sound: convert "sound" subdirectory to UTF-8
[linux-2.6.git] / sound / oss / trident.c
1 /*
2  *      OSS driver for Linux 2.[46].x for
3  *
4  *      Trident 4D-Wave
5  *      SiS 7018
6  *      ALi 5451
7  *      Tvia/IGST CyberPro 5050
8  *
9  *      Driver: Alan Cox <alan@redhat.com>
10  *
11  *  Built from:
12  *      Low level code: <audio@tridentmicro.com> from ALSA
13  *      Framework: Thomas Sailer <sailer@ife.ee.ethz.ch>
14  *      Extended by: Zach Brown <zab@redhat.com>  
15  *
16  *  Hacked up by:
17  *      Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
18  *      Ollie Lho <ollie@sis.com.tw> SiS 7018 Audio Core Support
19  *      Ching-Ling Lee <cling-li@ali.com.tw> ALi 5451 Audio Core Support 
20  *      Matt Wu <mattwu@acersoftech.com.cn> ALi 5451 Audio Core Support
21  *      Peter W├Ąchtler <pwaechtler@loewe-komp.de> CyberPro5050 support
22  *      Muli Ben-Yehuda <mulix@mulix.org>
23  *
24  *
25  *      This program is free software; you can redistribute it and/or modify
26  *      it under the terms of the GNU General Public License as published by
27  *      the Free Software Foundation; either version 2 of the License, or
28  *      (at your option) any later version.
29  *
30  *      This program is distributed in the hope that it will be useful,
31  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
32  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
33  *      GNU General Public License for more details.
34  *
35  *      You should have received a copy of the GNU General Public License
36  *      along with this program; if not, write to the Free Software
37  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
38  *
39  *  History
40  *  v0.14.10j
41  *      January 3 2004 Eugene Teo <eugeneteo@eugeneteo.net>
42  *      minor cleanup to use pr_debug instead of TRDBG since it is already
43  *      defined in linux/kernel.h.
44  *  v0.14.10i
45  *      December 29 2003 Muli Ben-Yehuda <mulix@mulix.org>
46  *      major cleanup for 2.6, fix a few error patch buglets
47  *      with returning without properly cleaning up first,
48  *      get rid of lock_kernel().
49  *  v0.14.10h
50  *      Sept 10 2002 Pascal Schmidt <der.eremit@email.de>
51  *      added support for ALi 5451 joystick port
52  *  v0.14.10g
53  *      Sept 05 2002 Alan Cox <alan@redhat.com>
54  *      adapt to new pci joystick attachment interface
55  *  v0.14.10f
56  *      July 24 2002 Muli Ben-Yehuda <mulix@actcom.co.il>
57  *      patch from Eric Lemar (via Ian Soboroff): in suspend and resume, 
58  *      fix wrong cast from pci_dev* to struct trident_card*. 
59  *  v0.14.10e
60  *      July 19 2002 Muli Ben-Yehuda <mulix@actcom.co.il>
61  *      rewrite the DMA buffer allocation/deallcoation functions, to make it 
62  *      modular and fix a bug where we would call free_pages on memory 
63  *      obtained with pci_alloc_consistent. Also remove unnecessary #ifdef 
64  *      CONFIG_PROC_FS and various other cleanups.
65  *  v0.14.10d
66  *      July 19 2002 Muli Ben-Yehuda <mulix@actcom.co.il>
67  *      made several printk(KERN_NOTICE...) into TRDBG(...), to avoid spamming
68  *      my syslog with hundreds of messages. 
69  *  v0.14.10c
70  *      July 16 2002 Muli Ben-Yehuda <mulix@actcom.co.il>
71  *      Cleaned up Lei Hu's 0.4.10 driver to conform to Documentation/CodingStyle
72  *      and the coding style used in the rest of the file. 
73  *  v0.14.10b
74  *      June 23 2002 Muli Ben-Yehuda <mulix@actcom.co.il>
75  *      add a missing unlock_set_fmt, remove a superflous lock/unlock pair 
76  *      with nothing in between. 
77  *  v0.14.10a
78  *      June 21 2002 Muli Ben-Yehuda <mulix@actcom.co.il> 
79  *      use a debug macro instead of #ifdef CONFIG_DEBUG, trim to 80 columns 
80  *      per line, use 'do {} while (0)' in statement macros. 
81  *  v0.14.10
82  *      June 6 2002 Lei Hu <Lei_hu@ali.com.tw>
83  *      rewrite the part to read/write registers of audio codec for Ali5451 
84  *  v0.14.9e
85  *      January 2 2002 Vojtech Pavlik <vojtech@ucw.cz> added gameport
86  *      support to avoid resource conflict with pcigame.c
87  *  v0.14.9d
88  *      October 8 2001 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
89  *      use set_current_state, properly release resources on failure in
90  *      trident_probe, get rid of check_region
91  *  v0.14.9c
92  *      August 10 2001 Peter W├Ąchtler <pwaechtler@loewe-komp.de>
93  *      added support for Tvia (formerly Integraphics/IGST) CyberPro5050
94  *      this chip is often found in settop boxes (combined video+audio)
95  *  v0.14.9b
96  *      Switch to static inline not extern inline (gcc 3)
97  *  v0.14.9a
98  *      Aug 6 2001 Alan Cox
99  *      0.14.9 crashed on rmmod due to a timer/bh left running. Simplified
100  *      the existing logic (the BH doesn't help as ac97 is lock_irqsave)
101  *      and used del_timer_sync to clean up
102  *      Fixed a problem where the ALi change broke my generic card
103  *  v0.14.9
104  *      Jul 10 2001 Matt Wu
105  *      Add H/W Volume Control
106  *  v0.14.8a
107  *      July 7 2001 Alan Cox
108  *      Moved Matt Wu's ac97 register cache into the card structure
109  *  v0.14.8
110  *      Apr 30 2001 Matt Wu
111  *      Set EBUF1 and EBUF2 to still mode
112  *      Add dc97/ac97 reset function
113  *      Fix power management: ali_restore_regs
114  *  unreleased 
115  *      Mar 09 2001 Matt Wu
116  *      Add cache for ac97 access
117  *  v0.14.7
118  *      Feb 06 2001 Matt Wu
119  *      Fix ac97 initialization
120  *      Fix bug: an extra tail will be played when playing
121  *      Jan 05 2001 Matt Wu
122  *      Implement multi-channels and S/PDIF in support for ALi 1535+
123  *  v0.14.6 
124  *      Nov 1 2000 Ching-Ling Lee
125  *      Fix the bug of memory leak when switching 5.1-channels to 2 channels.
126  *      Add lock protection into dynamic changing format of data.
127  *      Oct 18 2000 Ching-Ling Lee
128  *      5.1-channels support for ALi
129  *      June 28 2000 Ching-Ling Lee
130  *      S/PDIF out/in(playback/record) support for ALi 1535+, using /proc to be selected by user
131  *      Simple Power Management support for ALi
132  *  v0.14.5 May 23 2000 Ollie Lho
133  *      Misc bug fix from the Net
134  *  v0.14.4 May 20 2000 Aaron Holtzman
135  *      Fix kfree'd memory access in release
136  *      Fix race in open while looking for a free virtual channel slot
137  *      remove open_wait wq (which appears to be unused)
138  *  v0.14.3 May 10 2000 Ollie Lho
139  *      fixed a small bug in trident_update_ptr, xmms 1.0.1 no longer uses 100% CPU
140  *  v0.14.2 Mar 29 2000 Ching-Ling Lee
141  *      Add clear to silence advance in trident_update_ptr 
142  *      fix invalid data of the end of the sound
143  *  v0.14.1 Mar 24 2000 Ching-Ling Lee
144  *      ALi 5451 support added, playback and recording O.K.
145  *      ALi 5451 originally developed and structured based on sonicvibes, and
146  *      suggested to merge into this file by Alan Cox.
147  *  v0.14 Mar 15 2000 Ollie Lho
148  *      5.1 channel output support with channel binding. What's the Matrix ?
149  *  v0.13.1 Mar 10 2000 Ollie Lho
150  *      few minor bugs on dual codec support, needs more testing
151  *  v0.13 Mar 03 2000 Ollie Lho
152  *      new pci_* for 2.4 kernel, back ported to 2.2
153  *  v0.12 Feb 23 2000 Ollie Lho
154  *      Preliminary Recording support
155  *  v0.11.2 Feb 19 2000 Ollie Lho
156  *      removed incomplete full-dulplex support
157  *  v0.11.1 Jan 28 2000 Ollie Lho
158  *      small bug in setting sample rate for 4d-nx (reported by Aaron)
159  *  v0.11 Jan 27 2000 Ollie Lho
160  *      DMA bug, scheduler latency, second try
161  *  v0.10 Jan 24 2000 Ollie Lho
162  *      DMA bug fixed, found kernel scheduling problem
163  *  v0.09 Jan 20 2000 Ollie Lho
164  *      Clean up of channel register access routine (prepare for channel binding)
165  *  v0.08 Jan 14 2000 Ollie Lho
166  *      Isolation of AC97 codec code
167  *  v0.07 Jan 13 2000 Ollie Lho
168  *      Get rid of ugly old low level access routines (e.g. CHRegs.lp****)
169  *  v0.06 Jan 11 2000 Ollie Lho
170  *      Preliminary support for dual (more ?) AC97 codecs
171  *  v0.05 Jan 08 2000 Luca Montecchiani <m.luca@iname.com>
172  *      adapt to 2.3.x new __setup/__init call
173  *  v0.04 Dec 31 1999 Ollie Lho
174  *      Multiple Open, using Middle Loop Interrupt to smooth playback
175  *  v0.03 Dec 24 1999 Ollie Lho
176  *      mem leak in prog_dmabuf and dealloc_dmabuf removed
177  *  v0.02 Dec 15 1999 Ollie Lho
178  *      SiS 7018 support added, playback O.K.
179  *  v0.01 Alan Cox et. al.
180  *      Initial Release in kernel 2.3.30, does not work
181  * 
182  *  ToDo
183  *      Clean up of low level channel register access code. (done)
184  *      Fix the bug on dma buffer management in update_ptr, read/write, drain_dac (done)
185  *      Dual AC97 codecs support (done)
186  *      Recording support (done)
187  *      Mmap support
188  *      "Channel Binding" ioctl extension (done)
189  *      new pci device driver interface for 2.4 kernel (done)
190  *
191  *      Lock order (high->low)
192  *              lock    -       hardware lock
193  *              open_mutex -    guard opens
194  *              sem     -       guard dmabuf, write re-entry etc
195  */
196
197 #include <linux/module.h>
198 #include <linux/string.h>
199 #include <linux/ctype.h>
200 #include <linux/ioport.h>
201 #include <linux/sched.h>
202 #include <linux/delay.h>
203 #include <linux/sound.h>
204 #include <linux/slab.h>
205 #include <linux/soundcard.h>
206 #include <linux/pci.h>
207 #include <linux/init.h>
208 #include <linux/poll.h>
209 #include <linux/spinlock.h>
210 #include <linux/ac97_codec.h>
211 #include <linux/bitops.h>
212 #include <linux/proc_fs.h>
213 #include <linux/interrupt.h>
214 #include <linux/pm.h>
215 #include <linux/gameport.h>
216 #include <linux/kernel.h>
217 #include <linux/mutex.h>
218 #include <linux/mm.h>
219
220 #include <asm/uaccess.h>
221 #include <asm/io.h>
222 #include <asm/dma.h>
223
224 #if defined(CONFIG_ALPHA_NAUTILUS) || defined(CONFIG_ALPHA_GENERIC)
225 #include <asm/hwrpb.h>
226 #endif
227
228 #include "trident.h"
229
230 #define DRIVER_VERSION "0.14.10j-2.6"
231
232 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
233 #define SUPPORT_JOYSTICK 1
234 #endif
235
236 /* magic numbers to protect our data structures */
237 #define TRIDENT_CARD_MAGIC      0x5072696E      /* "Prin" */
238 #define TRIDENT_STATE_MAGIC     0x63657373      /* "cess" */
239
240 #define TRIDENT_DMA_MASK        0x3fffffff      /* DMA buffer mask for pci_alloc_consist */
241 #define ALI_DMA_MASK            0x7fffffff      /* ALI Tridents have 31-bit DMA. Wow. */
242
243 #define NR_HW_CH                32
244
245 /* maximum number of AC97 codecs connected, AC97 2.0 defined 4, but 7018 and 4D-NX only
246    have 2 SDATA_IN lines (currently) */
247 #define NR_AC97         2
248
249 /* minor number of /dev/swmodem (temporary, experimental) */
250 #define SND_DEV_SWMODEM 7
251
252 static const unsigned ali_multi_channels_5_1[] = {
253         /*ALI_SURR_LEFT_CHANNEL, ALI_SURR_RIGHT_CHANNEL, */
254         ALI_CENTER_CHANNEL,
255         ALI_LEF_CHANNEL,
256         ALI_SURR_LEFT_CHANNEL,
257         ALI_SURR_RIGHT_CHANNEL
258 };
259
260 static const unsigned sample_size[] = { 1, 2, 2, 4 };
261 static const unsigned sample_shift[] = { 0, 1, 1, 2 };
262
263 static const char invalid_magic[] = KERN_CRIT "trident: invalid magic value in %s\n";
264
265 enum {
266         TRIDENT_4D_DX = 0,
267         TRIDENT_4D_NX,
268         SIS_7018,
269         ALI_5451,
270         CYBER5050
271 };
272
273 static char *card_names[] = {
274         "Trident 4DWave DX",
275         "Trident 4DWave NX",
276         "SiS 7018 PCI Audio",
277         "ALi Audio Accelerator",
278         "Tvia/IGST CyberPro 5050"
279 };
280
281 static struct pci_device_id trident_pci_tbl[] = {
282         {PCI_DEVICE(PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_TRIDENT_4DWAVE_DX),
283                 PCI_CLASS_MULTIMEDIA_AUDIO << 8, 0xffff00, TRIDENT_4D_DX},
284         {PCI_DEVICE(PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_TRIDENT_4DWAVE_NX),
285                 0, 0, TRIDENT_4D_NX},
286         {PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7018), 0, 0, SIS_7018},
287         {PCI_DEVICE(PCI_VENDOR_ID_ALI, PCI_DEVICE_ID_ALI_5451), 0, 0, ALI_5451},
288         {PCI_DEVICE(PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_5050),
289                 0, 0, CYBER5050},
290         {0,}
291 };
292
293 MODULE_DEVICE_TABLE(pci, trident_pci_tbl);
294
295 /* "software" or virtual channel, an instance of opened /dev/dsp */
296 struct trident_state {
297         unsigned int magic;
298         struct trident_card *card;      /* Card info */
299
300         /* file mode */
301         mode_t open_mode;
302
303         /* virtual channel number */
304         int virt;
305
306         struct dmabuf {
307                 /* wave sample stuff */
308                 unsigned int rate;
309                 unsigned char fmt, enable;
310
311                 /* hardware channel */
312                 struct trident_channel *channel;
313
314                 /* OSS buffer management stuff */
315                 void *rawbuf;
316                 dma_addr_t dma_handle;
317                 unsigned buforder;
318                 unsigned numfrag;
319                 unsigned fragshift;
320
321                 /* our buffer acts like a circular ring */
322                 unsigned hwptr; /* where dma last started, updated by update_ptr */
323                 unsigned swptr; /* where driver last clear/filled, updated by read/write */
324                 int count;      /* bytes to be comsumed or been generated by dma machine */
325                 unsigned total_bytes;   /* total bytes dmaed by hardware */
326
327                 unsigned error; /* number of over/underruns */
328                 /* put process on wait queue when no more space in buffer */
329                 wait_queue_head_t wait; 
330
331                 /* redundant, but makes calculations easier */
332                 unsigned fragsize;
333                 unsigned dmasize;
334                 unsigned fragsamples;
335
336                 /* OSS stuff */
337                 unsigned mapped:1;
338                 unsigned ready:1;
339                 unsigned endcleared:1;
340                 unsigned update_flag;
341                 unsigned ossfragshift;
342                 int ossmaxfrags;
343                 unsigned subdivision;
344
345         } dmabuf;
346
347         /* 5.1 channels */
348         struct trident_state *other_states[4];
349         int multi_channels_adjust_count;
350         unsigned chans_num;
351         unsigned long fmt_flag;
352         /* Guard against mmap/write/read races */
353         struct mutex sem;
354
355 };
356
357 /* hardware channels */
358 struct trident_channel {
359         int num; /* channel number */
360         u32 lba; /* Loop Begine Address, where dma buffer starts */
361         u32 eso; /* End Sample Offset, wehre dma buffer ends */ 
362                  /* (in the unit of samples) */
363         u32 delta; /* delta value, sample rate / 48k for playback, */
364                    /* 48k/sample rate for recording */
365         u16 attribute; /* control where PCM data go and come  */
366         u16 fm_vol;
367         u32 control; /* signed/unsigned, 8/16 bits, mono/stereo */
368 };
369
370 struct trident_pcm_bank_address {
371         u32 start;
372         u32 stop;
373         u32 aint;
374         u32 aint_en;
375 };
376
377 static struct trident_pcm_bank_address bank_a_addrs = {
378         T4D_START_A,
379         T4D_STOP_A,
380         T4D_AINT_A,
381         T4D_AINTEN_A
382 };
383
384 static struct trident_pcm_bank_address bank_b_addrs = {
385         T4D_START_B,
386         T4D_STOP_B,
387         T4D_AINT_B,
388         T4D_AINTEN_B
389 };
390
391 struct trident_pcm_bank {
392         /* register addresses to control bank operations */
393         struct trident_pcm_bank_address *addresses;
394         /* each bank has 32 channels */
395         u32 bitmap;             /* channel allocation bitmap */
396         struct trident_channel channels[32];
397 };
398
399 struct trident_card {
400         unsigned int magic;
401
402         /* We keep trident cards in a linked list */
403         struct trident_card *next;
404
405         /* single open lock mechanism, only used for recording */
406         struct mutex open_mutex;
407
408         /* The trident has a certain amount of cross channel interaction
409            so we use a single per card lock */
410         spinlock_t lock;
411
412         /* PCI device stuff */
413         struct pci_dev *pci_dev;
414         u16 pci_id;
415         u8 revision;
416
417         /* soundcore stuff */
418         int dev_audio;
419
420         /* structures for abstraction of hardware facilities, codecs, */ 
421         /* banks and channels */
422         struct ac97_codec *ac97_codec[NR_AC97];
423         struct trident_pcm_bank banks[NR_BANKS];
424         struct trident_state *states[NR_HW_CH];
425
426         /* hardware resources */
427         unsigned long iobase;
428         u32 irq;
429
430         /* Function support */
431         struct trident_channel *(*alloc_pcm_channel) (struct trident_card *);
432         struct trident_channel *(*alloc_rec_pcm_channel) (struct trident_card *);
433         void (*free_pcm_channel) (struct trident_card *, unsigned int chan);
434         void (*address_interrupt) (struct trident_card *);
435
436         /* Added by Matt Wu 01-05-2001 for spdif in */
437         int multi_channel_use_count;
438         int rec_channel_use_count;
439         u16 mixer_regs[64][NR_AC97];    /* Made card local by Alan */
440         int mixer_regs_ready;
441
442         /* Added for hardware volume control */
443         int hwvolctl;
444         struct timer_list timer;
445
446         /* Game port support */
447         struct gameport *gameport;
448 };
449
450 enum dmabuf_mode {
451         DM_PLAYBACK = 0,
452         DM_RECORD
453 };
454
455 /* table to map from CHANNELMASK to channel attribute for SiS 7018 */
456 static u16 mask2attr[] = {
457         PCM_LR, PCM_LR, SURR_LR, CENTER_LFE,
458         HSET, MIC, MODEM_LINE1, MODEM_LINE2,
459         I2S_LR, SPDIF_LR
460 };
461
462 /* table to map from channel attribute to CHANNELMASK for SiS 7018 */
463 static int attr2mask[] = {
464         DSP_BIND_MODEM1, DSP_BIND_MODEM2, DSP_BIND_FRONT, DSP_BIND_HANDSET,
465         DSP_BIND_I2S, DSP_BIND_CENTER_LFE, DSP_BIND_SURR, DSP_BIND_SPDIF
466 };
467
468 /* Added by Matt Wu 01-05-2001 for spdif in */
469 static int ali_close_multi_channels(void);
470 static void ali_delay(struct trident_card *card, int interval);
471 static void ali_detect_spdif_rate(struct trident_card *card);
472
473 static void ali_ac97_write(struct ac97_codec *codec, u8 reg, u16 val);
474 static u16 ali_ac97_read(struct ac97_codec *codec, u8 reg);
475
476 static struct trident_card *devs;
477
478 static void trident_ac97_set(struct ac97_codec *codec, u8 reg, u16 val);
479 static u16 trident_ac97_get(struct ac97_codec *codec, u8 reg);
480
481 static int trident_open_mixdev(struct inode *inode, struct file *file);
482 static int trident_ioctl_mixdev(struct inode *inode, struct file *file, 
483                                 unsigned int cmd, unsigned long arg);
484
485 static void ali_ac97_set(struct trident_card *card, int secondary, u8 reg, u16 val);
486 static u16 ali_ac97_get(struct trident_card *card, int secondary, u8 reg);
487 static void ali_set_spdif_out_rate(struct trident_card *card, unsigned int rate);
488 static void ali_enable_special_channel(struct trident_state *stat);
489 static struct trident_channel *ali_alloc_rec_pcm_channel(struct trident_card *card);
490 static struct trident_channel *ali_alloc_pcm_channel(struct trident_card *card);
491 static void ali_free_pcm_channel(struct trident_card *card, unsigned int channel);
492 static int ali_setup_multi_channels(struct trident_card *card, int chan_nums);
493 static unsigned int ali_get_spdif_in_rate(struct trident_card *card);
494 static void ali_setup_spdif_in(struct trident_card *card);
495 static void ali_disable_spdif_in(struct trident_card *card);
496 static void ali_disable_special_channel(struct trident_card *card, int ch);
497 static void ali_setup_spdif_out(struct trident_card *card, int flag);
498 static int ali_write_5_1(struct trident_state *state,
499                          const char __user *buffer, 
500                          int cnt_for_multi_channel, unsigned int *copy_count, 
501                          unsigned int *state_cnt);
502 static int ali_allocate_other_states_resources(struct trident_state *state, 
503                                                int chan_nums);
504 static void ali_free_other_states_resources(struct trident_state *state);
505
506 #define seek_offset(dma_ptr, buffer, cnt, offset, copy_count)   do { \
507         (dma_ptr) += (offset);    \
508         (buffer) += (offset);     \
509         (cnt) -= (offset);        \
510         (copy_count) += (offset); \
511 } while (0)
512
513 static inline int lock_set_fmt(struct trident_state* state)
514 {
515         if (test_and_set_bit(0, &state->fmt_flag))
516                 return -EFAULT;
517
518         return 0;
519 }
520
521 static inline void unlock_set_fmt(struct trident_state* state)
522 {
523         clear_bit(0, &state->fmt_flag);
524 }
525
526 static int
527 trident_enable_loop_interrupts(struct trident_card *card)
528 {
529         u32 global_control;
530
531         global_control = inl(TRID_REG(card, T4D_LFO_GC_CIR));
532
533         switch (card->pci_id) {
534         case PCI_DEVICE_ID_SI_7018:
535                 global_control |= (ENDLP_IE | MIDLP_IE | BANK_B_EN);
536                 break;
537         case PCI_DEVICE_ID_ALI_5451:
538         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
539         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
540         case PCI_DEVICE_ID_INTERG_5050:
541                 global_control |= (ENDLP_IE | MIDLP_IE);
542                 break;
543         default:
544                 return 0;
545         }
546
547         outl(global_control, TRID_REG(card, T4D_LFO_GC_CIR));
548
549         pr_debug("trident: Enable Loop Interrupts, globctl = 0x%08X\n",
550                  inl(TRID_REG(card, T4D_LFO_GC_CIR)));
551
552         return 1;
553 }
554
555 static int
556 trident_disable_loop_interrupts(struct trident_card *card)
557 {
558         u32 global_control;
559
560         global_control = inl(TRID_REG(card, T4D_LFO_GC_CIR));
561         global_control &= ~(ENDLP_IE | MIDLP_IE);
562         outl(global_control, TRID_REG(card, T4D_LFO_GC_CIR));
563
564         pr_debug("trident: Disabled Loop Interrupts, globctl = 0x%08X\n",
565                  global_control);
566
567         return 1;
568 }
569
570 static void
571 trident_enable_voice_irq(struct trident_card *card, unsigned int channel)
572 {
573         unsigned int mask = 1 << (channel & 0x1f);
574         struct trident_pcm_bank *bank = &card->banks[channel >> 5];
575         u32 reg, addr = bank->addresses->aint_en;
576
577         reg = inl(TRID_REG(card, addr));
578         reg |= mask;
579         outl(reg, TRID_REG(card, addr));
580
581 #ifdef DEBUG
582         reg = inl(TRID_REG(card, addr));
583         pr_debug("trident: enabled IRQ on channel %d, %s = 0x%08x(addr:%X)\n",
584                  channel, addr == T4D_AINTEN_B ? "AINTEN_B" : "AINTEN_A",
585                  reg, addr);
586 #endif /* DEBUG */
587 }
588
589 static void
590 trident_disable_voice_irq(struct trident_card *card, unsigned int channel)
591 {
592         unsigned int mask = 1 << (channel & 0x1f);
593         struct trident_pcm_bank *bank = &card->banks[channel >> 5];
594         u32 reg, addr = bank->addresses->aint_en;
595
596         reg = inl(TRID_REG(card, addr));
597         reg &= ~mask;
598         outl(reg, TRID_REG(card, addr));
599
600         /* Ack the channel in case the interrupt was set before we disable it. */
601         outl(mask, TRID_REG(card, bank->addresses->aint));
602
603 #ifdef DEBUG
604         reg = inl(TRID_REG(card, addr));
605         pr_debug("trident: disabled IRQ on channel %d, %s = 0x%08x(addr:%X)\n",
606                  channel, addr == T4D_AINTEN_B ? "AINTEN_B" : "AINTEN_A",
607                  reg, addr);
608 #endif /* DEBUG */
609 }
610
611 static void
612 trident_start_voice(struct trident_card *card, unsigned int channel)
613 {
614         unsigned int mask = 1 << (channel & 0x1f);
615         struct trident_pcm_bank *bank = &card->banks[channel >> 5];
616         u32 addr = bank->addresses->start;
617
618 #ifdef DEBUG
619         u32 reg;
620 #endif /* DEBUG */
621
622         outl(mask, TRID_REG(card, addr));
623
624 #ifdef DEBUG
625         reg = inl(TRID_REG(card, addr));
626         pr_debug("trident: start voice on channel %d, %s = 0x%08x(addr:%X)\n",
627                  channel, addr == T4D_START_B ? "START_B" : "START_A",
628                  reg, addr);
629 #endif /* DEBUG */
630 }
631
632 static void
633 trident_stop_voice(struct trident_card *card, unsigned int channel)
634 {
635         unsigned int mask = 1 << (channel & 0x1f);
636         struct trident_pcm_bank *bank = &card->banks[channel >> 5];
637         u32 addr = bank->addresses->stop;
638
639 #ifdef DEBUG
640         u32 reg;
641 #endif /* DEBUG */
642
643         outl(mask, TRID_REG(card, addr));
644
645 #ifdef DEBUG
646         reg = inl(TRID_REG(card, addr));
647         pr_debug("trident: stop voice on channel %d, %s = 0x%08x(addr:%X)\n",
648                  channel, addr == T4D_STOP_B ? "STOP_B" : "STOP_A",
649                  reg, addr);
650 #endif /* DEBUG */
651 }
652
653 static u32
654 trident_get_interrupt_mask(struct trident_card *card, unsigned int channel)
655 {
656         struct trident_pcm_bank *bank = &card->banks[channel];
657         u32 addr = bank->addresses->aint;
658         return inl(TRID_REG(card, addr));
659 }
660
661 static int
662 trident_check_channel_interrupt(struct trident_card *card, unsigned int channel)
663 {
664         unsigned int mask = 1 << (channel & 0x1f);
665         u32 reg = trident_get_interrupt_mask(card, channel >> 5);
666
667 #ifdef DEBUG
668         if (reg & mask)
669                 pr_debug("trident: channel %d has interrupt, %s = 0x%08x\n",
670                          channel, reg == T4D_AINT_B ? "AINT_B" : "AINT_A",
671                          reg);
672 #endif /* DEBUG */
673         return (reg & mask) ? 1 : 0;
674 }
675
676 static void
677 trident_ack_channel_interrupt(struct trident_card *card, unsigned int channel)
678 {
679         unsigned int mask = 1 << (channel & 0x1f);
680         struct trident_pcm_bank *bank = &card->banks[channel >> 5];
681         u32 reg, addr = bank->addresses->aint;
682
683         reg = inl(TRID_REG(card, addr));
684         reg &= mask;
685         outl(reg, TRID_REG(card, addr));
686
687 #ifdef DEBUG
688         reg = inl(TRID_REG(card, T4D_AINT_B));
689         pr_debug("trident: Ack channel %d interrupt, AINT_B = 0x%08x\n",
690                  channel, reg);
691 #endif /* DEBUG */
692 }
693
694 static struct trident_channel *
695 trident_alloc_pcm_channel(struct trident_card *card)
696 {
697         struct trident_pcm_bank *bank;
698         int idx;
699
700         bank = &card->banks[BANK_B];
701
702         for (idx = 31; idx >= 0; idx--) {
703                 if (!(bank->bitmap & (1 << idx))) {
704                         struct trident_channel *channel = &bank->channels[idx];
705                         bank->bitmap |= 1 << idx;
706                         channel->num = idx + 32;
707                         return channel;
708                 }
709         }
710
711         /* no more free channels available */
712         printk(KERN_ERR "trident: no more channels available on Bank B.\n");
713         return NULL;
714 }
715
716 static void
717 trident_free_pcm_channel(struct trident_card *card, unsigned int channel)
718 {
719         int bank;
720         unsigned char b;
721
722         if (channel < 31 || channel > 63)
723                 return;
724
725         if (card->pci_id == PCI_DEVICE_ID_TRIDENT_4DWAVE_DX || 
726             card->pci_id == PCI_DEVICE_ID_TRIDENT_4DWAVE_NX) {
727                 b = inb(TRID_REG(card, T4D_REC_CH));
728                 if ((b & ~0x80) == channel)
729                         outb(0x0, TRID_REG(card, T4D_REC_CH));
730         }
731
732         bank = channel >> 5;
733         channel = channel & 0x1f;
734
735         card->banks[bank].bitmap &= ~(1 << (channel));
736 }
737
738 static struct trident_channel *
739 cyber_alloc_pcm_channel(struct trident_card *card)
740 {
741         struct trident_pcm_bank *bank;
742         int idx;
743
744         /* The cyberpro 5050 has only 32 voices and one bank */
745         /* .. at least they are not documented (if you want to call that 
746          * crap documentation), perhaps broken ? */
747
748         bank = &card->banks[BANK_A];
749
750         for (idx = 31; idx >= 0; idx--) {
751                 if (!(bank->bitmap & (1 << idx))) {
752                         struct trident_channel *channel = &bank->channels[idx];
753                         bank->bitmap |= 1 << idx;
754                         channel->num = idx;
755                         return channel;
756                 }
757         }
758
759         /* no more free channels available */
760         printk(KERN_ERR "cyberpro5050: no more channels available on Bank A.\n");
761         return NULL;
762 }
763
764 static void
765 cyber_free_pcm_channel(struct trident_card *card, unsigned int channel)
766 {
767         if (channel > 31)
768                 return;
769         card->banks[BANK_A].bitmap &= ~(1 << (channel));
770 }
771
772 static inline void
773 cyber_outidx(int port, int idx, int data)
774 {
775         outb(idx, port);
776         outb(data, port + 1);
777 }
778
779 static inline int
780 cyber_inidx(int port, int idx)
781 {
782         outb(idx, port);
783         return inb(port + 1);
784 }
785
786 static int
787 cyber_init_ritual(struct trident_card *card)
788 {
789         /* some black magic, taken from SDK samples */
790         /* remove this and nothing will work */
791         int portDat;
792         int ret = 0;
793         unsigned long flags;
794
795         /*
796          *      Keep interrupts off for the configure - we don't want to
797          *      clash with another cyberpro config event
798          */
799
800         spin_lock_irqsave(&card->lock, flags);
801         portDat = cyber_inidx(CYBER_PORT_AUDIO, CYBER_IDX_AUDIO_ENABLE);
802         /* enable, if it was disabled */
803         if ((portDat & CYBER_BMSK_AUENZ) != CYBER_BMSK_AUENZ_ENABLE) {
804                 printk(KERN_INFO "cyberpro5050: enabling audio controller\n");
805                 cyber_outidx(CYBER_PORT_AUDIO, CYBER_IDX_AUDIO_ENABLE, 
806                              portDat | CYBER_BMSK_AUENZ_ENABLE);
807                 /* check again if hardware is enabled now */
808                 portDat = cyber_inidx(CYBER_PORT_AUDIO, CYBER_IDX_AUDIO_ENABLE);
809         }
810         if ((portDat & CYBER_BMSK_AUENZ) != CYBER_BMSK_AUENZ_ENABLE) {
811                 printk(KERN_ERR "cyberpro5050: initAudioAccess: no success\n");
812                 ret = -1;
813         } else {
814                 cyber_outidx(CYBER_PORT_AUDIO, CYBER_IDX_IRQ_ENABLE, 
815                              CYBER_BMSK_AUDIO_INT_ENABLE);
816                 cyber_outidx(CYBER_PORT_AUDIO, 0xbf, 0x01);
817                 cyber_outidx(CYBER_PORT_AUDIO, 0xba, 0x20);
818                 cyber_outidx(CYBER_PORT_AUDIO, 0xbb, 0x08);
819                 cyber_outidx(CYBER_PORT_AUDIO, 0xbf, 0x02);
820                 cyber_outidx(CYBER_PORT_AUDIO, 0xb3, 0x06);
821                 cyber_outidx(CYBER_PORT_AUDIO, 0xbf, 0x00);
822         }
823         spin_unlock_irqrestore(&card->lock, flags);
824         return ret;
825 }
826
827 /*  called with spin lock held */
828
829 static int
830 trident_load_channel_registers(struct trident_card *card, u32 * data, 
831                                unsigned int channel)
832 {
833         int i;
834
835         if (channel > 63)
836                 return 0;
837
838         /* select hardware channel to write */
839         outb(channel, TRID_REG(card, T4D_LFO_GC_CIR));
840
841         /* Output the channel registers, but don't write register
842            three to an ALI chip. */
843         for (i = 0; i < CHANNEL_REGS; i++) {
844                 if (i == 3 && card->pci_id == PCI_DEVICE_ID_ALI_5451)
845                         continue;
846                 outl(data[i], TRID_REG(card, CHANNEL_START + 4 * i));
847         }
848         if (card->pci_id == PCI_DEVICE_ID_ALI_5451 || 
849             card->pci_id == PCI_DEVICE_ID_INTERG_5050) {
850                 outl(ALI_EMOD_Still, TRID_REG(card, ALI_EBUF1));
851                 outl(ALI_EMOD_Still, TRID_REG(card, ALI_EBUF2));
852         }
853         return 1;
854 }
855
856 /* called with spin lock held */
857 static int
858 trident_write_voice_regs(struct trident_state *state)
859 {
860         unsigned int data[CHANNEL_REGS + 1];
861         struct trident_channel *channel;
862
863         channel = state->dmabuf.channel;
864
865         data[1] = channel->lba;
866         data[4] = channel->control;
867
868         switch (state->card->pci_id) {
869         case PCI_DEVICE_ID_ALI_5451:
870                 data[0] = 0;    /* Current Sample Offset */
871                 data[2] = (channel->eso << 16) | (channel->delta & 0xffff);
872                 data[3] = 0;
873                 break;
874         case PCI_DEVICE_ID_SI_7018:
875         case PCI_DEVICE_ID_INTERG_5050:
876                 data[0] = 0;    /* Current Sample Offset */
877                 data[2] = (channel->eso << 16) | (channel->delta & 0xffff);
878                 data[3] = (channel->attribute << 16) | (channel->fm_vol & 0xffff);
879                 break;
880         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
881                 data[0] = 0;    /* Current Sample Offset */
882                 data[2] = (channel->eso << 16) | (channel->delta & 0xffff);
883                 data[3] = channel->fm_vol & 0xffff;
884                 break;
885         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
886                 data[0] = (channel->delta << 24);
887                 data[2] = ((channel->delta << 16) & 0xff000000) | 
888                         (channel->eso & 0x00ffffff);
889                 data[3] = channel->fm_vol & 0xffff;
890                 break;
891         default:
892                 return 0;
893         }
894
895         return trident_load_channel_registers(state->card, data, channel->num);
896 }
897
898 static int
899 compute_rate_play(u32 rate)
900 {
901         int delta;
902         /* We special case 44100 and 8000 since rounding with the equation
903            does not give us an accurate enough value. For 11025 and 22050
904            the equation gives us the best answer. All other frequencies will
905            also use the equation. JDW */
906         if (rate == 44100)
907                 delta = 0xeb3;
908         else if (rate == 8000)
909                 delta = 0x2ab;
910         else if (rate == 48000)
911                 delta = 0x1000;
912         else
913                 delta = (((rate << 12) + rate) / 48000) & 0x0000ffff;
914         return delta;
915 }
916
917 static int
918 compute_rate_rec(u32 rate)
919 {
920         int delta;
921
922         if (rate == 44100)
923                 delta = 0x116a;
924         else if (rate == 8000)
925                 delta = 0x6000;
926         else if (rate == 48000)
927                 delta = 0x1000;
928         else
929                 delta = ((48000 << 12) / rate) & 0x0000ffff;
930
931         return delta;
932 }
933
934 /* set playback sample rate */
935 static unsigned int
936 trident_set_dac_rate(struct trident_state *state, unsigned int rate)
937 {
938         struct dmabuf *dmabuf = &state->dmabuf;
939
940         if (rate > 48000)
941                 rate = 48000;
942         if (rate < 4000)
943                 rate = 4000;
944
945         dmabuf->rate = rate;
946         dmabuf->channel->delta = compute_rate_play(rate);
947
948         trident_write_voice_regs(state);
949
950         pr_debug("trident: called trident_set_dac_rate : rate = %d\n", rate);
951
952         return rate;
953 }
954
955 /* set recording sample rate */
956 static unsigned int
957 trident_set_adc_rate(struct trident_state *state, unsigned int rate)
958 {
959         struct dmabuf *dmabuf = &state->dmabuf;
960
961         if (rate > 48000)
962                 rate = 48000;
963         if (rate < 4000)
964                 rate = 4000;
965
966         dmabuf->rate = rate;
967         dmabuf->channel->delta = compute_rate_rec(rate);
968
969         trident_write_voice_regs(state);
970
971         pr_debug("trident: called trident_set_adc_rate : rate = %d\n", rate);
972
973         return rate;
974 }
975
976 /* prepare channel attributes for playback */
977 static void
978 trident_play_setup(struct trident_state *state)
979 {
980         struct dmabuf *dmabuf = &state->dmabuf;
981         struct trident_channel *channel = dmabuf->channel;
982
983         channel->lba = dmabuf->dma_handle;
984         channel->delta = compute_rate_play(dmabuf->rate);
985
986         channel->eso = dmabuf->dmasize >> sample_shift[dmabuf->fmt];
987         channel->eso -= 1;
988
989         if (state->card->pci_id != PCI_DEVICE_ID_SI_7018) {
990                 channel->attribute = 0;
991                 if (state->card->pci_id == PCI_DEVICE_ID_ALI_5451) {
992                         if ((channel->num == ALI_SPDIF_IN_CHANNEL) || 
993                             (channel->num == ALI_PCM_IN_CHANNEL))
994                                 ali_disable_special_channel(state->card, channel->num);
995                         else if ((inl(TRID_REG(state->card, ALI_GLOBAL_CONTROL)) 
996                                   & ALI_SPDIF_OUT_CH_ENABLE)
997                                  && (channel->num == ALI_SPDIF_OUT_CHANNEL)) {
998                                 ali_set_spdif_out_rate(state->card, 
999                                                        state->dmabuf.rate);
1000                                 state->dmabuf.channel->delta = 0x1000;
1001                         }
1002                 }
1003         }
1004
1005         channel->fm_vol = 0x0;
1006
1007         channel->control = CHANNEL_LOOP;
1008         if (dmabuf->fmt & TRIDENT_FMT_16BIT) {
1009                 /* 16-bits */
1010                 channel->control |= CHANNEL_16BITS;
1011                 /* signed */
1012                 channel->control |= CHANNEL_SIGNED;
1013         }
1014         if (dmabuf->fmt & TRIDENT_FMT_STEREO)
1015                 /* stereo */
1016                 channel->control |= CHANNEL_STEREO;
1017
1018         pr_debug("trident: trident_play_setup, LBA = 0x%08x, Delta = 0x%08x, "
1019                  "ESO = 0x%08x, Control = 0x%08x\n", channel->lba,
1020                  channel->delta, channel->eso, channel->control);
1021
1022         trident_write_voice_regs(state);
1023 }
1024
1025 /* prepare channel attributes for recording */
1026 static void
1027 trident_rec_setup(struct trident_state *state)
1028 {
1029         u16 w;
1030         u8 bval;
1031
1032         struct trident_card *card = state->card;
1033         struct dmabuf *dmabuf = &state->dmabuf;
1034         struct trident_channel *channel = dmabuf->channel;
1035         unsigned int rate;
1036
1037         /* Enable AC-97 ADC (capture) */
1038         switch (card->pci_id) {
1039         case PCI_DEVICE_ID_ALI_5451:
1040                 ali_enable_special_channel(state);
1041                 break;
1042         case PCI_DEVICE_ID_SI_7018:
1043                 /* for 7018, the ac97 is always in playback/record (duplex) mode */
1044                 break;
1045         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
1046                 w = inb(TRID_REG(card, DX_ACR2_AC97_COM_STAT));
1047                 outb(w | 0x48, TRID_REG(card, DX_ACR2_AC97_COM_STAT));
1048                 /* enable and set record channel */
1049                 outb(0x80 | channel->num, TRID_REG(card, T4D_REC_CH));
1050                 break;
1051         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
1052                 w = inw(TRID_REG(card, T4D_MISCINT));
1053                 outw(w | 0x1000, TRID_REG(card, T4D_MISCINT));
1054                 /* enable and set record channel */
1055                 outb(0x80 | channel->num, TRID_REG(card, T4D_REC_CH));
1056                 break;
1057         case PCI_DEVICE_ID_INTERG_5050:
1058                 /* don't know yet, using special channel 22 in GC1(0xd4)? */
1059                 break;
1060         default:
1061                 return;
1062         }
1063
1064         channel->lba = dmabuf->dma_handle;
1065         channel->delta = compute_rate_rec(dmabuf->rate);
1066         if ((card->pci_id == PCI_DEVICE_ID_ALI_5451) && 
1067             (channel->num == ALI_SPDIF_IN_CHANNEL)) {
1068                 rate = ali_get_spdif_in_rate(card);
1069                 if (rate == 0) {
1070                         printk(KERN_WARNING "trident: ALi 5451 "
1071                                "S/PDIF input setup error!\n");
1072                         rate = 48000;
1073                 }
1074                 bval = inb(TRID_REG(card, ALI_SPDIF_CTRL));
1075                 if (bval & 0x10) {
1076                         outb(bval, TRID_REG(card, ALI_SPDIF_CTRL));
1077                         printk(KERN_WARNING "trident: cleared ALi "
1078                                "5451 S/PDIF parity error flag.\n");
1079                 }
1080
1081                 if (rate != 48000)
1082                         channel->delta = ((rate << 12) / dmabuf->rate) & 0x0000ffff;
1083         }
1084
1085         channel->eso = dmabuf->dmasize >> sample_shift[dmabuf->fmt];
1086         channel->eso -= 1;
1087
1088         if (state->card->pci_id != PCI_DEVICE_ID_SI_7018) {
1089                 channel->attribute = 0;
1090         }
1091
1092         channel->fm_vol = 0x0;
1093
1094         channel->control = CHANNEL_LOOP;
1095         if (dmabuf->fmt & TRIDENT_FMT_16BIT) {
1096                 /* 16-bits */
1097                 channel->control |= CHANNEL_16BITS;
1098                 /* signed */
1099                 channel->control |= CHANNEL_SIGNED;
1100         }
1101         if (dmabuf->fmt & TRIDENT_FMT_STEREO)
1102                 /* stereo */
1103                 channel->control |= CHANNEL_STEREO;
1104
1105         pr_debug("trident: trident_rec_setup, LBA = 0x%08x, Delat = 0x%08x, "
1106                  "ESO = 0x%08x, Control = 0x%08x\n", channel->lba,
1107                  channel->delta, channel->eso, channel->control);
1108
1109         trident_write_voice_regs(state);
1110 }
1111
1112 /* get current playback/recording dma buffer pointer (byte offset from LBA),
1113    called with spinlock held! */
1114 static inline unsigned
1115 trident_get_dma_addr(struct trident_state *state)
1116 {
1117         struct dmabuf *dmabuf = &state->dmabuf;
1118         u32 cso;
1119
1120         if (!dmabuf->enable)
1121                 return 0;
1122
1123         outb(dmabuf->channel->num, TRID_REG(state->card, T4D_LFO_GC_CIR));
1124
1125         switch (state->card->pci_id) {
1126         case PCI_DEVICE_ID_ALI_5451:
1127         case PCI_DEVICE_ID_SI_7018:
1128         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
1129         case PCI_DEVICE_ID_INTERG_5050:
1130                 /* 16 bits ESO, CSO for 7018 and DX */
1131                 cso = inw(TRID_REG(state->card, CH_DX_CSO_ALPHA_FMS + 2));
1132                 break;
1133         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
1134                 /* 24 bits ESO, CSO for NX */
1135                 cso = inl(TRID_REG(state->card, CH_NX_DELTA_CSO)) & 0x00ffffff;
1136                 break;
1137         default:
1138                 return 0;
1139         }
1140
1141         pr_debug("trident: trident_get_dma_addr: chip reported channel: %d, "
1142                  "cso = 0x%04x\n", dmabuf->channel->num, cso);
1143
1144         /* ESO and CSO are in units of Samples, convert to byte offset */
1145         cso <<= sample_shift[dmabuf->fmt];
1146
1147         return (cso % dmabuf->dmasize);
1148 }
1149
1150 /* Stop recording (lock held) */
1151 static inline void
1152 __stop_adc(struct trident_state *state)
1153 {
1154         struct dmabuf *dmabuf = &state->dmabuf;
1155         unsigned int chan_num = dmabuf->channel->num;
1156         struct trident_card *card = state->card;
1157
1158         dmabuf->enable &= ~ADC_RUNNING;
1159         trident_stop_voice(card, chan_num);
1160         trident_disable_voice_irq(card, chan_num);
1161 }
1162
1163 static void
1164 stop_adc(struct trident_state *state)
1165 {
1166         struct trident_card *card = state->card;
1167         unsigned long flags;
1168
1169         spin_lock_irqsave(&card->lock, flags);
1170         __stop_adc(state);
1171         spin_unlock_irqrestore(&card->lock, flags);
1172 }
1173
1174 static void
1175 start_adc(struct trident_state *state)
1176 {
1177         struct dmabuf *dmabuf = &state->dmabuf;
1178         unsigned int chan_num = dmabuf->channel->num;
1179         struct trident_card *card = state->card;
1180         unsigned long flags;
1181
1182         spin_lock_irqsave(&card->lock, flags);
1183         if ((dmabuf->mapped || 
1184              dmabuf->count < (signed) dmabuf->dmasize) && 
1185             dmabuf->ready) {
1186                 dmabuf->enable |= ADC_RUNNING;
1187                 trident_enable_voice_irq(card, chan_num);
1188                 trident_start_voice(card, chan_num);
1189         }
1190         spin_unlock_irqrestore(&card->lock, flags);
1191 }
1192
1193 /* stop playback (lock held) */
1194 static inline void
1195 __stop_dac(struct trident_state *state)
1196 {
1197         struct dmabuf *dmabuf = &state->dmabuf;
1198         unsigned int chan_num = dmabuf->channel->num;
1199         struct trident_card *card = state->card;
1200
1201         dmabuf->enable &= ~DAC_RUNNING;
1202         trident_stop_voice(card, chan_num);
1203         if (state->chans_num == 6) {
1204                 trident_stop_voice(card, state->other_states[0]->
1205                                    dmabuf.channel->num);
1206                 trident_stop_voice(card, state->other_states[1]->
1207                                    dmabuf.channel->num);
1208                 trident_stop_voice(card, state->other_states[2]->
1209                                    dmabuf.channel->num);
1210                 trident_stop_voice(card, state->other_states[3]->
1211                                    dmabuf.channel->num);
1212         }
1213         trident_disable_voice_irq(card, chan_num);
1214 }
1215
1216 static void
1217 stop_dac(struct trident_state *state)
1218 {
1219         struct trident_card *card = state->card;
1220         unsigned long flags;
1221
1222         spin_lock_irqsave(&card->lock, flags);
1223         __stop_dac(state);
1224         spin_unlock_irqrestore(&card->lock, flags);
1225 }
1226
1227 static void
1228 start_dac(struct trident_state *state)
1229 {
1230         struct dmabuf *dmabuf = &state->dmabuf;
1231         unsigned int chan_num = dmabuf->channel->num;
1232         struct trident_card *card = state->card;
1233         unsigned long flags;
1234
1235         spin_lock_irqsave(&card->lock, flags);
1236         if ((dmabuf->mapped || dmabuf->count > 0) && dmabuf->ready) {
1237                 dmabuf->enable |= DAC_RUNNING;
1238                 trident_enable_voice_irq(card, chan_num);
1239                 trident_start_voice(card, chan_num);
1240                 if (state->chans_num == 6) {
1241                         trident_start_voice(card, state->other_states[0]->
1242                                             dmabuf.channel->num);
1243                         trident_start_voice(card, state->other_states[1]->
1244                                             dmabuf.channel->num);
1245                         trident_start_voice(card, state->other_states[2]->
1246                                             dmabuf.channel->num);
1247                         trident_start_voice(card, state->other_states[3]->
1248                                             dmabuf.channel->num);
1249                 }
1250         }
1251         spin_unlock_irqrestore(&card->lock, flags);
1252 }
1253
1254 #define DMABUF_DEFAULTORDER (15-PAGE_SHIFT)
1255 #define DMABUF_MINORDER 1
1256
1257 /* alloc a DMA buffer of with a buffer of this order */
1258 static int
1259 alloc_dmabuf(struct dmabuf *dmabuf, struct pci_dev *pci_dev, int order)
1260 {
1261         void *rawbuf = NULL;
1262         struct page *page, *pend;
1263
1264         if (!(rawbuf = pci_alloc_consistent(pci_dev, PAGE_SIZE << order, 
1265                                             &dmabuf->dma_handle)))
1266                 return -ENOMEM;
1267
1268         pr_debug("trident: allocated %ld (order = %d) bytes at %p\n",
1269                  PAGE_SIZE << order, order, rawbuf);
1270
1271         dmabuf->ready = dmabuf->mapped = 0;
1272         dmabuf->rawbuf = rawbuf;
1273         dmabuf->buforder = order;
1274
1275         /* now mark the pages as reserved; otherwise */ 
1276         /* remap_pfn_range doesn't do what we want */
1277         pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
1278         for (page = virt_to_page(rawbuf); page <= pend; page++)
1279                 SetPageReserved(page);
1280
1281         return 0;
1282 }
1283
1284 /* allocate the main DMA buffer, playback and recording buffer should be */
1285 /* allocated separately */
1286 static int
1287 alloc_main_dmabuf(struct trident_state *state)
1288 {
1289         struct dmabuf *dmabuf = &state->dmabuf;
1290         int order;
1291         int ret = -ENOMEM;
1292
1293         /* alloc as big a chunk as we can, FIXME: is this necessary ?? */
1294         for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) {
1295                 if (!(ret = alloc_dmabuf(dmabuf, state->card->pci_dev, order)))
1296                         return 0;
1297                 /* else try again */
1298         }
1299         return ret;
1300 }
1301
1302 /* deallocate a DMA buffer */
1303 static void
1304 dealloc_dmabuf(struct dmabuf *dmabuf, struct pci_dev *pci_dev)
1305 {
1306         struct page *page, *pend;
1307
1308         if (dmabuf->rawbuf) {
1309                 /* undo marking the pages as reserved */
1310                 pend = virt_to_page(dmabuf->rawbuf + (PAGE_SIZE << dmabuf->buforder) - 1);
1311                 for (page = virt_to_page(dmabuf->rawbuf); page <= pend; page++)
1312                         ClearPageReserved(page);
1313                 pci_free_consistent(pci_dev, PAGE_SIZE << dmabuf->buforder, 
1314                                     dmabuf->rawbuf, dmabuf->dma_handle);
1315                 dmabuf->rawbuf = NULL;
1316         }
1317         dmabuf->mapped = dmabuf->ready = 0;
1318 }
1319
1320 static int
1321 prog_dmabuf(struct trident_state *state, enum dmabuf_mode rec)
1322 {
1323         struct dmabuf *dmabuf = &state->dmabuf;
1324         unsigned bytepersec;
1325         struct trident_state *s = state;
1326         unsigned bufsize, dma_nums;
1327         unsigned long flags;
1328         int ret, i, order;
1329
1330         if ((ret = lock_set_fmt(state)) < 0)
1331                 return ret;
1332
1333         if (state->chans_num == 6)
1334                 dma_nums = 5;
1335         else
1336                 dma_nums = 1;
1337
1338         for (i = 0; i < dma_nums; i++) {
1339                 if (i > 0) {
1340                         s = state->other_states[i - 1];
1341                         dmabuf = &s->dmabuf;
1342                         dmabuf->fmt = state->dmabuf.fmt;
1343                         dmabuf->rate = state->dmabuf.rate;
1344                 }
1345
1346                 spin_lock_irqsave(&s->card->lock, flags);
1347                 dmabuf->hwptr = dmabuf->swptr = dmabuf->total_bytes = 0;
1348                 dmabuf->count = dmabuf->error = 0;
1349                 spin_unlock_irqrestore(&s->card->lock, flags);
1350
1351                 /* allocate DMA buffer if not allocated yet */
1352                 if (!dmabuf->rawbuf) {
1353                         if (i == 0) {
1354                                 if ((ret = alloc_main_dmabuf(state))) {
1355                                         unlock_set_fmt(state);
1356                                         return ret;
1357                                 }
1358                         } else {
1359                                 ret = -ENOMEM;
1360                                 order = state->dmabuf.buforder - 1;
1361                                 if (order >= DMABUF_MINORDER) {
1362                                         ret = alloc_dmabuf(dmabuf,
1363                                                            state->card->pci_dev,
1364                                                            order);
1365                                 }
1366                                 if (ret) {
1367                                         /* release the main DMA buffer */
1368                                         dealloc_dmabuf(&state->dmabuf, state->card->pci_dev);
1369                                         /* release the auxiliary DMA buffers */
1370                                         for (i -= 2; i >= 0; i--)
1371                                                 dealloc_dmabuf(&state->other_states[i]->dmabuf, 
1372                                                                state->card->pci_dev);
1373                                         unlock_set_fmt(state);
1374                                         return ret;
1375                                 }
1376                         }
1377                 }
1378                 /* FIXME: figure out all this OSS fragment stuff */
1379                 bytepersec = dmabuf->rate << sample_shift[dmabuf->fmt];
1380                 bufsize = PAGE_SIZE << dmabuf->buforder;
1381                 if (dmabuf->ossfragshift) {
1382                         if ((1000 << dmabuf->ossfragshift) < bytepersec)
1383                                 dmabuf->fragshift = ld2(bytepersec / 1000);
1384                         else
1385                                 dmabuf->fragshift = dmabuf->ossfragshift;
1386                 } else {
1387                         /* lets hand out reasonable big ass buffers by default */
1388                         dmabuf->fragshift = (dmabuf->buforder + PAGE_SHIFT - 2);
1389                 }
1390                 dmabuf->numfrag = bufsize >> dmabuf->fragshift;
1391                 while (dmabuf->numfrag < 4 && dmabuf->fragshift > 3) {
1392                         dmabuf->fragshift--;
1393                         dmabuf->numfrag = bufsize >> dmabuf->fragshift;
1394                 }
1395                 dmabuf->fragsize = 1 << dmabuf->fragshift;
1396                 if (dmabuf->ossmaxfrags >= 4 && dmabuf->ossmaxfrags < dmabuf->numfrag)
1397                         dmabuf->numfrag = dmabuf->ossmaxfrags;
1398                 dmabuf->fragsamples = dmabuf->fragsize >> sample_shift[dmabuf->fmt];
1399                 dmabuf->dmasize = dmabuf->numfrag << dmabuf->fragshift;
1400
1401                 memset(dmabuf->rawbuf, (dmabuf->fmt & TRIDENT_FMT_16BIT) ? 0 : 0x80, 
1402                        dmabuf->dmasize);
1403
1404                 spin_lock_irqsave(&s->card->lock, flags);
1405                 if (rec == DM_RECORD)
1406                         trident_rec_setup(s);
1407                 else /* DM_PLAYBACK */
1408                         trident_play_setup(s);
1409
1410                 spin_unlock_irqrestore(&s->card->lock, flags);
1411
1412                 /* set the ready flag for the dma buffer */
1413                 dmabuf->ready = 1;
1414
1415                 pr_debug("trident: prog_dmabuf(%d), sample rate = %d, "
1416                          "format = %d, numfrag = %d, fragsize = %d "
1417                          "dmasize = %d\n", dmabuf->channel->num,
1418                          dmabuf->rate, dmabuf->fmt, dmabuf->numfrag,
1419                          dmabuf->fragsize, dmabuf->dmasize);
1420         }
1421         unlock_set_fmt(state);
1422         return 0;
1423 }
1424
1425
1426 static inline int prog_dmabuf_record(struct trident_state* state)
1427 {
1428         return prog_dmabuf(state, DM_RECORD);
1429 }
1430
1431 static inline int prog_dmabuf_playback(struct trident_state* state)
1432 {
1433         return prog_dmabuf(state, DM_PLAYBACK);
1434 }
1435
1436 /* we are doing quantum mechanics here, the buffer can only be empty, half or full filled i.e.
1437    |------------|------------|   or   |xxxxxxxxxxxx|------------|   or   |xxxxxxxxxxxx|xxxxxxxxxxxx|
1438    but we almost always get this
1439    |xxxxxx------|------------|   or   |xxxxxxxxxxxx|xxxxx-------|
1440    so we have to clear the tail space to "silence"
1441    |xxxxxx000000|------------|   or   |xxxxxxxxxxxx|xxxxxx000000|
1442 */
1443 static void
1444 trident_clear_tail(struct trident_state *state)
1445 {
1446         struct dmabuf *dmabuf = &state->dmabuf;
1447         unsigned swptr;
1448         unsigned char silence = (dmabuf->fmt & TRIDENT_FMT_16BIT) ? 0 : 0x80;
1449         unsigned int len;
1450         unsigned long flags;
1451
1452         spin_lock_irqsave(&state->card->lock, flags);
1453         swptr = dmabuf->swptr;
1454         spin_unlock_irqrestore(&state->card->lock, flags);
1455
1456         if (swptr == 0 || swptr == dmabuf->dmasize / 2 || 
1457             swptr == dmabuf->dmasize)
1458                 return;
1459
1460         if (swptr < dmabuf->dmasize / 2)
1461                 len = dmabuf->dmasize / 2 - swptr;
1462         else
1463                 len = dmabuf->dmasize - swptr;
1464
1465         memset(dmabuf->rawbuf + swptr, silence, len);
1466         if (state->card->pci_id != PCI_DEVICE_ID_ALI_5451) {
1467                 spin_lock_irqsave(&state->card->lock, flags);
1468                 dmabuf->swptr += len;
1469                 dmabuf->count += len;
1470                 spin_unlock_irqrestore(&state->card->lock, flags);
1471         }
1472
1473         /* restart the dma machine in case it is halted */
1474         start_dac(state);
1475 }
1476
1477 static int
1478 drain_dac(struct trident_state *state, int nonblock)
1479 {
1480         DECLARE_WAITQUEUE(wait, current);
1481         struct dmabuf *dmabuf = &state->dmabuf;
1482         unsigned long flags;
1483         unsigned long tmo;
1484         int count;
1485         unsigned long diff = 0;
1486
1487         if (dmabuf->mapped || !dmabuf->ready)
1488                 return 0;
1489
1490         add_wait_queue(&dmabuf->wait, &wait);
1491         for (;;) {
1492                 /* It seems that we have to set the current state to TASK_INTERRUPTIBLE
1493                    every time to make the process really go to sleep */
1494                 set_current_state(TASK_INTERRUPTIBLE);
1495
1496                 spin_lock_irqsave(&state->card->lock, flags);
1497                 count = dmabuf->count;
1498                 spin_unlock_irqrestore(&state->card->lock, flags);
1499
1500                 if (count <= 0)
1501                         break;
1502
1503                 if (signal_pending(current))
1504                         break;
1505
1506                 if (nonblock) {
1507                         remove_wait_queue(&dmabuf->wait, &wait);
1508                         set_current_state(TASK_RUNNING);
1509                         return -EBUSY;
1510                 }
1511
1512                 /* No matter how much data is left in the buffer, we have to wait until
1513                    CSO == ESO/2 or CSO == ESO when address engine interrupts */
1514                 if (state->card->pci_id == PCI_DEVICE_ID_ALI_5451 || 
1515                     state->card->pci_id == PCI_DEVICE_ID_INTERG_5050) {
1516                         diff = dmabuf->swptr - trident_get_dma_addr(state) + dmabuf->dmasize;
1517                         diff = diff % (dmabuf->dmasize);
1518                         tmo = (diff * HZ) / dmabuf->rate;
1519                 } else {
1520                         tmo = (dmabuf->dmasize * HZ) / dmabuf->rate;
1521                 }
1522                 tmo >>= sample_shift[dmabuf->fmt];
1523                 if (!schedule_timeout(tmo ? tmo : 1) && tmo) {
1524                         break;
1525                 }
1526         }
1527         remove_wait_queue(&dmabuf->wait, &wait);
1528         set_current_state(TASK_RUNNING);
1529         if (signal_pending(current))
1530                 return -ERESTARTSYS;
1531
1532         return 0;
1533 }
1534
1535 /* update buffer manangement pointers, especially, */ 
1536 /* dmabuf->count and dmabuf->hwptr */
1537 static void
1538 trident_update_ptr(struct trident_state *state)
1539 {
1540         struct dmabuf *dmabuf = &state->dmabuf;
1541         unsigned hwptr, swptr;
1542         int clear_cnt = 0;
1543         int diff;
1544         unsigned char silence;
1545         unsigned half_dmasize;
1546
1547         /* update hardware pointer */
1548         hwptr = trident_get_dma_addr(state);
1549         diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
1550         dmabuf->hwptr = hwptr;
1551         dmabuf->total_bytes += diff;
1552
1553         /* error handling and process wake up for ADC */
1554         if (dmabuf->enable == ADC_RUNNING) {
1555                 if (dmabuf->mapped) {
1556                         dmabuf->count -= diff;
1557                         if (dmabuf->count >= (signed) dmabuf->fragsize)
1558                                 wake_up(&dmabuf->wait);
1559                 } else {
1560                         dmabuf->count += diff;
1561
1562                         if (dmabuf->count < 0 || 
1563                             dmabuf->count > dmabuf->dmasize) {
1564                                 /* buffer underrun or buffer overrun, */ 
1565                                 /* we have no way to recover it here, just */ 
1566                                 /* stop the machine and let the process */ 
1567                                 /* force hwptr and swptr to sync */
1568                                 __stop_adc(state);
1569                                 dmabuf->error++;
1570                         }
1571                         if (dmabuf->count < (signed) dmabuf->dmasize / 2)
1572                                 wake_up(&dmabuf->wait);
1573                 }
1574         }
1575
1576         /* error handling and process wake up for DAC */
1577         if (dmabuf->enable == DAC_RUNNING) {
1578                 if (dmabuf->mapped) {
1579                         dmabuf->count += diff;
1580                         if (dmabuf->count >= (signed) dmabuf->fragsize)
1581                                 wake_up(&dmabuf->wait);
1582                 } else {
1583                         dmabuf->count -= diff;
1584
1585                         if (dmabuf->count < 0 || 
1586                             dmabuf->count > dmabuf->dmasize) {
1587                                 /* buffer underrun or buffer overrun, we have no way to recover
1588                                    it here, just stop the machine and let the process force hwptr
1589                                    and swptr to sync */
1590                                 __stop_dac(state);
1591                                 dmabuf->error++;
1592                         } else if (!dmabuf->endcleared) {
1593                                 swptr = dmabuf->swptr;
1594                                 silence = (dmabuf->fmt & TRIDENT_FMT_16BIT ? 0 : 0x80);
1595                                 if (dmabuf->update_flag & ALI_ADDRESS_INT_UPDATE) {
1596                                         /* We must clear end data of 1/2 dmabuf if needed.
1597                                            According to 1/2 algorithm of Address Engine Interrupt,
1598                                            check the validation of the data of half dmasize. */
1599                                         half_dmasize = dmabuf->dmasize / 2;
1600                                         if ((diff = hwptr - half_dmasize) < 0)
1601                                                 diff = hwptr;
1602                                         if ((dmabuf->count + diff) < half_dmasize) {
1603                                                 //there is invalid data in the end of half buffer
1604                                                 if ((clear_cnt = half_dmasize - swptr) < 0)
1605                                                         clear_cnt += half_dmasize;
1606                                                 //clear the invalid data
1607                                                 memset(dmabuf->rawbuf + swptr, silence, clear_cnt);
1608                                                 if (state->chans_num == 6) {
1609                                                         clear_cnt = clear_cnt / 2;
1610                                                         swptr = swptr / 2;
1611                                                         memset(state->other_states[0]->dmabuf.rawbuf + swptr, 
1612                                                                silence, clear_cnt);
1613                                                         memset(state->other_states[1]->dmabuf.rawbuf + swptr, 
1614                                                                silence, clear_cnt);
1615                                                         memset(state->other_states[2]->dmabuf.rawbuf + swptr, 
1616                                                                silence, clear_cnt);
1617                                                         memset(state->other_states[3]->dmabuf.rawbuf + swptr, 
1618                                                                silence, clear_cnt);
1619                                                 }
1620                                                 dmabuf->endcleared = 1;
1621                                         }
1622                                 } else if (dmabuf->count < (signed) dmabuf->fragsize) {
1623                                         clear_cnt = dmabuf->fragsize;
1624                                         if ((swptr + clear_cnt) > dmabuf->dmasize)
1625                                                 clear_cnt = dmabuf->dmasize - swptr;
1626                                         memset(dmabuf->rawbuf + swptr, silence, clear_cnt);
1627                                         if (state->chans_num == 6) {
1628                                                 clear_cnt = clear_cnt / 2;
1629                                                 swptr = swptr / 2;
1630                                                 memset(state->other_states[0]->dmabuf.rawbuf + swptr, 
1631                                                        silence, clear_cnt);
1632                                                 memset(state->other_states[1]->dmabuf.rawbuf + swptr, 
1633                                                        silence, clear_cnt);
1634                                                 memset(state->other_states[2]->dmabuf.rawbuf + swptr, 
1635                                                        silence, clear_cnt);
1636                                                 memset(state->other_states[3]->dmabuf.rawbuf + swptr, 
1637                                                        silence, clear_cnt);
1638                                         }
1639                                         dmabuf->endcleared = 1;
1640                                 }
1641                         }
1642                         /* trident_update_ptr is called by interrupt handler or by process via
1643                            ioctl/poll, we only wake up the waiting process when we have more
1644                            than 1/2 buffer free (always true for interrupt handler) */
1645                         if (dmabuf->count < (signed) dmabuf->dmasize / 2)
1646                                 wake_up(&dmabuf->wait);
1647                 }
1648         }
1649         dmabuf->update_flag &= ~ALI_ADDRESS_INT_UPDATE;
1650 }
1651
1652 static void
1653 trident_address_interrupt(struct trident_card *card)
1654 {
1655         int i;
1656         struct trident_state *state;
1657         unsigned int channel;
1658
1659         /* Update the pointers for all channels we are running. */
1660         /* FIXME: should read interrupt status only once */
1661         for (i = 0; i < NR_HW_CH; i++) {
1662                 channel = 63 - i;
1663                 if (trident_check_channel_interrupt(card, channel)) {
1664                         trident_ack_channel_interrupt(card, channel);
1665                         if ((state = card->states[i]) != NULL) {
1666                                 trident_update_ptr(state);
1667                         } else {
1668                                 printk(KERN_WARNING "trident: spurious channel " 
1669                                        "irq %d.\n", channel);
1670                                 trident_stop_voice(card, channel);
1671                                 trident_disable_voice_irq(card, channel);
1672                         }
1673                 }
1674         }
1675 }
1676
1677 static void
1678 ali_hwvol_control(struct trident_card *card, int opt)
1679 {
1680         u16 dwTemp, volume[2], mute, diff, *pVol[2];
1681
1682         dwTemp = ali_ac97_read(card->ac97_codec[0], 0x02);
1683         mute = dwTemp & 0x8000;
1684         volume[0] = dwTemp & 0x001f;
1685         volume[1] = (dwTemp & 0x1f00) >> 8;
1686         if (volume[0] < volume[1]) {
1687                 pVol[0] = &volume[0];
1688                 pVol[1] = &volume[1];
1689         } else {
1690                 pVol[1] = &volume[0];
1691                 pVol[0] = &volume[1];
1692         }
1693         diff = *(pVol[1]) - *(pVol[0]);
1694
1695         if (opt == 1) {         // MUTE
1696                 dwTemp ^= 0x8000;
1697                 ali_ac97_write(card->ac97_codec[0], 
1698                                0x02, dwTemp);
1699         } else if (opt == 2) {  // Down
1700                 if (mute)
1701                         return;
1702                 if (*(pVol[1]) < 0x001f) {
1703                         (*pVol[1])++;
1704                         *(pVol[0]) = *(pVol[1]) - diff;
1705                 }
1706                 dwTemp &= 0xe0e0;
1707                 dwTemp |= (volume[0]) | (volume[1] << 8);
1708                 ali_ac97_write(card->ac97_codec[0], 0x02, dwTemp);
1709                 card->ac97_codec[0]->mixer_state[0] = ((32 - volume[0]) * 25 / 8) | 
1710                         (((32 - volume[1]) * 25 / 8) << 8);
1711         } else if (opt == 4) {  // Up
1712                 if (mute)
1713                         return;
1714                 if (*(pVol[0]) > 0) {
1715                         (*pVol[0])--;
1716                         *(pVol[1]) = *(pVol[0]) + diff;
1717                 }
1718                 dwTemp &= 0xe0e0;
1719                 dwTemp |= (volume[0]) | (volume[1] << 8);
1720                 ali_ac97_write(card->ac97_codec[0], 0x02, dwTemp);
1721                 card->ac97_codec[0]->mixer_state[0] = ((32 - volume[0]) * 25 / 8) | 
1722                         (((32 - volume[1]) * 25 / 8) << 8);
1723         } else {
1724                 /* Nothing needs doing */
1725         }
1726 }
1727
1728 /*
1729  *      Re-enable reporting of vol change after 0.1 seconds
1730  */
1731
1732 static void
1733 ali_timeout(unsigned long ptr)
1734 {
1735         struct trident_card *card = (struct trident_card *) ptr;
1736         u16 temp = 0;
1737
1738         /* Enable GPIO IRQ (MISCINT bit 18h) */
1739         temp = inw(TRID_REG(card, T4D_MISCINT + 2));
1740         temp |= 0x0004;
1741         outw(temp, TRID_REG(card, T4D_MISCINT + 2));
1742 }
1743
1744 /*
1745  *      Set up the timer to clear the vol change notification
1746  */
1747
1748 static void
1749 ali_set_timer(struct trident_card *card)
1750 {
1751         /* Add Timer Routine to Enable GPIO IRQ */
1752         del_timer(&card->timer);        /* Never queue twice */
1753         card->timer.function = ali_timeout;
1754         card->timer.data = (unsigned long) card;
1755         card->timer.expires = jiffies + HZ / 10;
1756         add_timer(&card->timer);
1757 }
1758
1759 /*
1760  *      Process a GPIO event
1761  */
1762
1763 static void
1764 ali_queue_task(struct trident_card *card, int opt)
1765 {
1766         u16 temp;
1767
1768         /* Disable GPIO IRQ (MISCINT bit 18h) */
1769         temp = inw(TRID_REG(card, T4D_MISCINT + 2));
1770         temp &= (u16) (~0x0004);
1771         outw(temp, TRID_REG(card, T4D_MISCINT + 2));
1772
1773         /* Adjust the volume */
1774         ali_hwvol_control(card, opt);
1775
1776         /* Set the timer for 1/10th sec */
1777         ali_set_timer(card);
1778 }
1779
1780 static void
1781 cyber_address_interrupt(struct trident_card *card)
1782 {
1783         int i, irq_status;
1784         struct trident_state *state;
1785         unsigned int channel;
1786
1787         /* Update the pointers for all channels we are running. */
1788         /* FIXED: read interrupt status only once */
1789         irq_status = inl(TRID_REG(card, T4D_AINT_A));
1790
1791         pr_debug("cyber_address_interrupt: irq_status 0x%X\n", irq_status);
1792
1793         for (i = 0; i < NR_HW_CH; i++) {
1794                 channel = 31 - i;
1795                 if (irq_status & (1 << channel)) {
1796                         /* clear bit by writing a 1, zeroes are ignored */
1797                         outl((1 << channel), TRID_REG(card, T4D_AINT_A));
1798
1799                         pr_debug("cyber_interrupt: channel %d\n", channel);
1800
1801                         if ((state = card->states[i]) != NULL) {
1802                                 trident_update_ptr(state);
1803                         } else {
1804                                 printk(KERN_WARNING "cyber5050: spurious " 
1805                                        "channel irq %d.\n", channel);
1806                                 trident_stop_voice(card, channel);
1807                                 trident_disable_voice_irq(card, channel);
1808                         }
1809                 }
1810         }
1811 }
1812
1813 static irqreturn_t
1814 trident_interrupt(int irq, void *dev_id)
1815 {
1816         struct trident_card *card = (struct trident_card *) dev_id;
1817         u32 event;
1818         u32 gpio;
1819
1820         spin_lock(&card->lock);
1821         event = inl(TRID_REG(card, T4D_MISCINT));
1822
1823         pr_debug("trident: trident_interrupt called, MISCINT = 0x%08x\n",
1824                  event);
1825
1826         if (event & ADDRESS_IRQ) {
1827                 card->address_interrupt(card);
1828         }
1829
1830         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
1831                 /* GPIO IRQ (H/W Volume Control) */
1832                 event = inl(TRID_REG(card, T4D_MISCINT));
1833                 if (event & (1 << 25)) {
1834                         gpio = inl(TRID_REG(card, ALI_GPIO));
1835                         if (!timer_pending(&card->timer))
1836                                 ali_queue_task(card, gpio & 0x07);
1837                 }
1838                 event = inl(TRID_REG(card, T4D_MISCINT));
1839                 outl(event | (ST_TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW), 
1840                      TRID_REG(card, T4D_MISCINT));
1841                 spin_unlock(&card->lock);
1842                 return IRQ_HANDLED;
1843         }
1844
1845         /* manually clear interrupt status, bad hardware design, blame T^2 */
1846         outl((ST_TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW), 
1847              TRID_REG(card, T4D_MISCINT));
1848         spin_unlock(&card->lock);
1849         return IRQ_HANDLED;
1850 }
1851
1852 /* in this loop, dmabuf.count signifies the amount of data that is waiting */ 
1853 /* to be copied to the user's buffer.  it is filled by the dma machine and */ 
1854 /* drained by this loop. */
1855 static ssize_t
1856 trident_read(struct file *file, char __user *buffer, size_t count, loff_t * ppos)
1857 {
1858         struct trident_state *state = (struct trident_state *)file->private_data;
1859         struct dmabuf *dmabuf = &state->dmabuf;
1860         ssize_t ret = 0;
1861         unsigned long flags;
1862         unsigned swptr;
1863         int cnt;
1864
1865         pr_debug("trident: trident_read called, count = %zd\n", count);
1866
1867         VALIDATE_STATE(state);
1868
1869         if (dmabuf->mapped)
1870                 return -ENXIO;
1871         if (!access_ok(VERIFY_WRITE, buffer, count))
1872                 return -EFAULT;
1873
1874         mutex_lock(&state->sem);
1875         if (!dmabuf->ready && (ret = prog_dmabuf_record(state)))
1876                 goto out;
1877
1878         while (count > 0) {
1879                 spin_lock_irqsave(&state->card->lock, flags);
1880                 if (dmabuf->count > (signed) dmabuf->dmasize) {
1881                         /* buffer overrun, we are recovering from */ 
1882                         /* sleep_on_timeout, resync hwptr and swptr, */ 
1883                         /* make process flush the buffer */
1884                         dmabuf->count = dmabuf->dmasize;
1885                         dmabuf->swptr = dmabuf->hwptr;
1886                 }
1887                 swptr = dmabuf->swptr;
1888                 cnt = dmabuf->dmasize - swptr;
1889                 if (dmabuf->count < cnt)
1890                         cnt = dmabuf->count;
1891                 spin_unlock_irqrestore(&state->card->lock, flags);
1892
1893                 if (cnt > count)
1894                         cnt = count;
1895                 if (cnt <= 0) {
1896                         unsigned long tmo;
1897                         /* buffer is empty, start the dma machine and */ 
1898                         /* wait for data to be recorded */
1899                         start_adc(state);
1900                         if (file->f_flags & O_NONBLOCK) {
1901                                 if (!ret)
1902                                         ret = -EAGAIN;
1903                                 goto out;
1904                         }
1905
1906                         mutex_unlock(&state->sem);
1907                         /* No matter how much space left in the buffer, */ 
1908                         /* we have to wait until CSO == ESO/2 or CSO == ESO */ 
1909                         /* when address engine interrupts */
1910                         tmo = (dmabuf->dmasize * HZ) / (dmabuf->rate * 2);
1911                         tmo >>= sample_shift[dmabuf->fmt];
1912                         /* There are two situations when sleep_on_timeout returns, one is when
1913                            the interrupt is serviced correctly and the process is waked up by
1914                            ISR ON TIME. Another is when timeout is expired, which means that
1915                            either interrupt is NOT serviced correctly (pending interrupt) or it
1916                            is TOO LATE for the process to be scheduled to run (scheduler latency)
1917                            which results in a (potential) buffer overrun. And worse, there is
1918                            NOTHING we can do to prevent it. */
1919                         if (!interruptible_sleep_on_timeout(&dmabuf->wait, tmo)) {
1920                                 pr_debug(KERN_ERR "trident: recording schedule timeout, "
1921                                          "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
1922                                          dmabuf->dmasize, dmabuf->fragsize, dmabuf->count,
1923                                          dmabuf->hwptr, dmabuf->swptr);
1924
1925                                 /* a buffer overrun, we delay the recovery until next time the
1926                                    while loop begin and we REALLY have space to record */
1927                         }
1928                         if (signal_pending(current)) {
1929                                 if (!ret)
1930                                         ret = -ERESTARTSYS;
1931                                 goto out;
1932                         }
1933                         mutex_lock(&state->sem);
1934                         if (dmabuf->mapped) {
1935                                 if (!ret)
1936                                         ret = -ENXIO;
1937                                 goto out;
1938                         }
1939                         continue;
1940                 }
1941
1942                 if (copy_to_user(buffer, dmabuf->rawbuf + swptr, cnt)) {
1943                         if (!ret)
1944                                 ret = -EFAULT;
1945                         goto out;
1946                 }
1947
1948                 swptr = (swptr + cnt) % dmabuf->dmasize;
1949
1950                 spin_lock_irqsave(&state->card->lock, flags);
1951                 dmabuf->swptr = swptr;
1952                 dmabuf->count -= cnt;
1953                 spin_unlock_irqrestore(&state->card->lock, flags);
1954
1955                 count -= cnt;
1956                 buffer += cnt;
1957                 ret += cnt;
1958                 start_adc(state);
1959         }
1960 out:
1961         mutex_unlock(&state->sem);
1962         return ret;
1963 }
1964
1965 /* in this loop, dmabuf.count signifies the amount of data that is waiting to be dma to
1966    the soundcard.  it is drained by the dma machine and filled by this loop. */
1967
1968 static ssize_t
1969 trident_write(struct file *file, const char __user *buffer, size_t count, loff_t * ppos)
1970 {
1971         struct trident_state *state = (struct trident_state *)file->private_data;
1972         struct dmabuf *dmabuf = &state->dmabuf;
1973         ssize_t ret;
1974         unsigned long flags;
1975         unsigned swptr;
1976         int cnt;
1977         unsigned int state_cnt;
1978         unsigned int copy_count;
1979         int lret; /* for lock_set_fmt */
1980
1981         pr_debug("trident: trident_write called, count = %zd\n", count);
1982
1983         VALIDATE_STATE(state);
1984
1985         /*
1986          *      Guard against an mmap or ioctl while writing
1987          */
1988
1989         mutex_lock(&state->sem);
1990
1991         if (dmabuf->mapped) {
1992                 ret = -ENXIO;
1993                 goto out;
1994         }
1995         if (!dmabuf->ready && (ret = prog_dmabuf_playback(state)))
1996                 goto out;
1997
1998         if (!access_ok(VERIFY_READ, buffer, count)) {
1999                 ret = -EFAULT;
2000                 goto out;
2001         }
2002
2003         ret = 0;
2004
2005         while (count > 0) {
2006                 spin_lock_irqsave(&state->card->lock, flags);
2007                 if (dmabuf->count < 0) {
2008                         /* buffer underrun, we are recovering from */ 
2009                         /* sleep_on_timeout, resync hwptr and swptr */
2010                         dmabuf->count = 0;
2011                         dmabuf->swptr = dmabuf->hwptr;
2012                 }
2013                 swptr = dmabuf->swptr;
2014                 cnt = dmabuf->dmasize - swptr;
2015                 if (dmabuf->count + cnt > dmabuf->dmasize)
2016                         cnt = dmabuf->dmasize - dmabuf->count;
2017                 spin_unlock_irqrestore(&state->card->lock, flags);
2018
2019                 if (cnt > count)
2020                         cnt = count;
2021                 if (cnt <= 0) {
2022                         unsigned long tmo;
2023                         /* buffer is full, start the dma machine and */ 
2024                         /* wait for data to be played */
2025                         start_dac(state);
2026                         if (file->f_flags & O_NONBLOCK) {
2027                                 if (!ret)
2028                                         ret = -EAGAIN;
2029                                 goto out;
2030                         }
2031                         /* No matter how much data left in the buffer, */ 
2032                         /* we have to wait until CSO == ESO/2 or CSO == ESO */ 
2033                         /* when address engine interrupts */
2034                         lock_set_fmt(state);
2035                         tmo = (dmabuf->dmasize * HZ) / (dmabuf->rate * 2);
2036                         tmo >>= sample_shift[dmabuf->fmt];
2037                         unlock_set_fmt(state);
2038                         mutex_unlock(&state->sem);
2039
2040                         /* There are two situations when sleep_on_timeout */ 
2041                         /* returns, one is when the interrupt is serviced */ 
2042                         /* correctly and the process is waked up by ISR */ 
2043                         /* ON TIME. Another is when timeout is expired, which */ 
2044                         /* means that either interrupt is NOT serviced */ 
2045                         /* correctly (pending interrupt) or it is TOO LATE */ 
2046                         /* for the process to be scheduled to run */ 
2047                         /* (scheduler latency) which results in a (potential) */ 
2048                         /* buffer underrun. And worse, there is NOTHING we */ 
2049                         /* can do to prevent it. */
2050                         if (!interruptible_sleep_on_timeout(&dmabuf->wait, tmo)) {
2051                                 pr_debug(KERN_ERR "trident: playback schedule "
2052                                          "timeout, dmasz %u fragsz %u count %i "
2053                                          "hwptr %u swptr %u\n", dmabuf->dmasize,
2054                                          dmabuf->fragsize, dmabuf->count,
2055                                          dmabuf->hwptr, dmabuf->swptr);
2056
2057                                 /* a buffer underrun, we delay the recovery */ 
2058                                 /* until next time the while loop begin and */ 
2059                                 /* we REALLY have data to play */
2060                         }
2061                         if (signal_pending(current)) {
2062                                 if (!ret)
2063                                         ret = -ERESTARTSYS;
2064                                 goto out_nolock;
2065                         }
2066                         mutex_lock(&state->sem);
2067                         if (dmabuf->mapped) {
2068                                 if (!ret)
2069                                         ret = -ENXIO;
2070                                 goto out;
2071                         }
2072                         continue;
2073                 }
2074                 if ((lret = lock_set_fmt(state)) < 0) {
2075                         ret = lret;
2076                         goto out;
2077                 }
2078
2079                 if (state->chans_num == 6) {
2080                         copy_count = 0;
2081                         state_cnt = 0;
2082                         if (ali_write_5_1(state, buffer, cnt, &copy_count, 
2083                                           &state_cnt) == -EFAULT) {
2084                                 if (state_cnt) {
2085                                         swptr = (swptr + state_cnt) % dmabuf->dmasize;
2086                                         spin_lock_irqsave(&state->card->lock, flags);
2087                                         dmabuf->swptr = swptr;
2088                                         dmabuf->count += state_cnt;
2089                                         dmabuf->endcleared = 0;
2090                                         spin_unlock_irqrestore(&state->card->lock, flags);
2091                                 }
2092                                 ret += copy_count;
2093                                 if (!ret)
2094                                         ret = -EFAULT;
2095                                 unlock_set_fmt(state);
2096                                 goto out;
2097                         }
2098                 } else {
2099                         if (copy_from_user(dmabuf->rawbuf + swptr, 
2100                                            buffer, cnt)) {
2101                                 if (!ret)
2102                                         ret = -EFAULT;
2103                                 unlock_set_fmt(state);
2104                                 goto out;
2105                         }
2106                         state_cnt = cnt;
2107                 }
2108                 unlock_set_fmt(state);
2109
2110                 swptr = (swptr + state_cnt) % dmabuf->dmasize;
2111
2112                 spin_lock_irqsave(&state->card->lock, flags);
2113                 dmabuf->swptr = swptr;
2114                 dmabuf->count += state_cnt;
2115                 dmabuf->endcleared = 0;
2116                 spin_unlock_irqrestore(&state->card->lock, flags);
2117
2118                 count -= cnt;
2119                 buffer += cnt;
2120                 ret += cnt;
2121                 start_dac(state);
2122         }
2123 out:
2124         mutex_unlock(&state->sem);
2125 out_nolock:
2126         return ret;
2127 }
2128
2129 /* No kernel lock - we have our own spinlock */
2130 static unsigned int
2131 trident_poll(struct file *file, struct poll_table_struct *wait)
2132 {
2133         struct trident_state *state = (struct trident_state *)file->private_data;
2134         struct dmabuf *dmabuf = &state->dmabuf;
2135         unsigned long flags;
2136         unsigned int mask = 0;
2137
2138         VALIDATE_STATE(state);
2139
2140         /*
2141          *      Guard against a parallel poll and write causing multiple
2142          *      prog_dmabuf events
2143          */
2144
2145         mutex_lock(&state->sem);
2146
2147         if (file->f_mode & FMODE_WRITE) {
2148                 if (!dmabuf->ready && prog_dmabuf_playback(state)) {
2149                         mutex_unlock(&state->sem);
2150                         return 0;
2151                 }
2152                 poll_wait(file, &dmabuf->wait, wait);
2153         }
2154         if (file->f_mode & FMODE_READ) {
2155                 if (!dmabuf->ready && prog_dmabuf_record(state)) {
2156                         mutex_unlock(&state->sem);
2157                         return 0;
2158                 }
2159                 poll_wait(file, &dmabuf->wait, wait);
2160         }
2161
2162         mutex_unlock(&state->sem);
2163
2164         spin_lock_irqsave(&state->card->lock, flags);
2165         trident_update_ptr(state);
2166         if (file->f_mode & FMODE_READ) {
2167                 if (dmabuf->count >= (signed) dmabuf->fragsize)
2168                         mask |= POLLIN | POLLRDNORM;
2169         }
2170         if (file->f_mode & FMODE_WRITE) {
2171                 if (dmabuf->mapped) {
2172                         if (dmabuf->count >= (signed) dmabuf->fragsize)
2173                                 mask |= POLLOUT | POLLWRNORM;
2174                 } else {
2175                         if ((signed) dmabuf->dmasize >= dmabuf->count + 
2176                             (signed) dmabuf->fragsize)
2177                                 mask |= POLLOUT | POLLWRNORM;
2178                 }
2179         }
2180         spin_unlock_irqrestore(&state->card->lock, flags);
2181
2182         return mask;
2183 }
2184
2185 static int
2186 trident_mmap(struct file *file, struct vm_area_struct *vma)
2187 {
2188         struct trident_state *state = (struct trident_state *)file->private_data;
2189         struct dmabuf *dmabuf = &state->dmabuf;
2190         int ret = -EINVAL;
2191         unsigned long size;
2192
2193         VALIDATE_STATE(state);
2194
2195         /*
2196          *      Lock against poll read write or mmap creating buffers. Also lock
2197          *      a read or write against an mmap.
2198          */
2199
2200         mutex_lock(&state->sem);
2201
2202         if (vma->vm_flags & VM_WRITE) {
2203                 if ((ret = prog_dmabuf_playback(state)) != 0)
2204                         goto out;
2205         } else if (vma->vm_flags & VM_READ) {
2206                 if ((ret = prog_dmabuf_record(state)) != 0)
2207                         goto out;
2208         } else
2209                 goto out;
2210
2211         ret = -EINVAL;
2212         if (vma->vm_pgoff != 0)
2213                 goto out;
2214         size = vma->vm_end - vma->vm_start;
2215         if (size > (PAGE_SIZE << dmabuf->buforder))
2216                 goto out;
2217         ret = -EAGAIN;
2218         if (remap_pfn_range(vma, vma->vm_start,
2219                              virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
2220                              size, vma->vm_page_prot))
2221                 goto out;
2222         dmabuf->mapped = 1;
2223         ret = 0;
2224 out:
2225         mutex_unlock(&state->sem);
2226         return ret;
2227 }
2228
2229 static int
2230 trident_ioctl(struct inode *inode, struct file *file, 
2231               unsigned int cmd, unsigned long arg)
2232 {
2233         struct trident_state *state = (struct trident_state *)file->private_data;
2234         struct dmabuf *dmabuf = &state->dmabuf;
2235         unsigned long flags;
2236         audio_buf_info abinfo;
2237         count_info cinfo;
2238         int val, mapped, ret = 0;
2239         struct trident_card *card = state->card;
2240         void __user *argp = (void __user *)arg;
2241         int __user *p = argp;
2242
2243         VALIDATE_STATE(state);
2244
2245
2246         mapped = ((file->f_mode & (FMODE_WRITE | FMODE_READ)) && dmabuf->mapped);
2247
2248         pr_debug("trident: trident_ioctl, command = %2d, arg = 0x%08x\n",
2249                  _IOC_NR(cmd), arg ? *p : 0);
2250
2251         switch (cmd) {
2252         case OSS_GETVERSION:
2253                 ret = put_user(SOUND_VERSION, p);
2254                 break;
2255
2256         case SNDCTL_DSP_RESET:
2257                 /* FIXME: spin_lock ? */
2258                 if (file->f_mode & FMODE_WRITE) {
2259                         stop_dac(state);
2260                         synchronize_irq(card->irq);
2261                         dmabuf->ready = 0;
2262                         dmabuf->swptr = dmabuf->hwptr = 0;
2263                         dmabuf->count = dmabuf->total_bytes = 0;
2264                 }
2265                 if (file->f_mode & FMODE_READ) {
2266                         stop_adc(state);
2267                         synchronize_irq(card->irq);
2268                         dmabuf->ready = 0;
2269                         dmabuf->swptr = dmabuf->hwptr = 0;
2270                         dmabuf->count = dmabuf->total_bytes = 0;
2271                 }
2272                 break;
2273
2274         case SNDCTL_DSP_SYNC:
2275                 if (file->f_mode & FMODE_WRITE)
2276                         ret = drain_dac(state, file->f_flags & O_NONBLOCK);
2277                 break;
2278
2279         case SNDCTL_DSP_SPEED:  /* set smaple rate */
2280                 if (get_user(val, p)) {
2281                         ret = -EFAULT;
2282                         break;
2283                 }
2284                 if (val >= 0) {
2285                         if (file->f_mode & FMODE_WRITE) {
2286                                 stop_dac(state);
2287                                 dmabuf->ready = 0;
2288                                 spin_lock_irqsave(&state->card->lock, flags);
2289                                 trident_set_dac_rate(state, val);
2290                                 spin_unlock_irqrestore(&state->card->lock, flags);
2291                         }
2292                         if (file->f_mode & FMODE_READ) {
2293                                 stop_adc(state);
2294                                 dmabuf->ready = 0;
2295                                 spin_lock_irqsave(&state->card->lock, flags);
2296                                 trident_set_adc_rate(state, val);
2297                                 spin_unlock_irqrestore(&state->card->lock, flags);
2298                         }
2299                 }
2300                 ret = put_user(dmabuf->rate, p);
2301                 break;
2302
2303         case SNDCTL_DSP_STEREO: /* set stereo or mono channel */
2304                 if (get_user(val, p)) {
2305                         ret = -EFAULT;
2306                         break;
2307                 }
2308                 if ((ret = lock_set_fmt(state)) < 0)
2309                         return ret;
2310
2311                 if (file->f_mode & FMODE_WRITE) {
2312                         stop_dac(state);
2313                         dmabuf->ready = 0;
2314                         if (val)
2315                                 dmabuf->fmt |= TRIDENT_FMT_STEREO;
2316                         else
2317                                 dmabuf->fmt &= ~TRIDENT_FMT_STEREO;
2318                 }
2319                 if (file->f_mode & FMODE_READ) {
2320                         stop_adc(state);
2321                         dmabuf->ready = 0;
2322                         if (val)
2323                                 dmabuf->fmt |= TRIDENT_FMT_STEREO;
2324                         else
2325                                 dmabuf->fmt &= ~TRIDENT_FMT_STEREO;
2326                 }
2327                 unlock_set_fmt(state);
2328                 break;
2329
2330         case SNDCTL_DSP_GETBLKSIZE:
2331                 if (file->f_mode & FMODE_WRITE) {
2332                         if ((val = prog_dmabuf_playback(state)))
2333                                 ret = val;
2334                         else
2335                                 ret = put_user(dmabuf->fragsize, p);
2336                         break;
2337                 }
2338                 if (file->f_mode & FMODE_READ) {
2339                         if ((val = prog_dmabuf_record(state)))
2340                                 ret = val;
2341                         else
2342                                 ret = put_user(dmabuf->fragsize, p);
2343                         break;
2344                 }
2345                 /* neither READ nor WRITE? is this even possible? */
2346                 ret = -EINVAL;
2347                 break;
2348
2349
2350         case SNDCTL_DSP_GETFMTS: /* Returns a mask of supported sample format */
2351                 ret = put_user(AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 | 
2352                                AFMT_U8, p);
2353                 break;
2354
2355         case SNDCTL_DSP_SETFMT: /* Select sample format */
2356                 if (get_user(val, p)) {
2357                         ret = -EFAULT;
2358                         break;
2359                 }
2360                 if ((ret = lock_set_fmt(state)) < 0)
2361                         return ret;
2362
2363                 if (val != AFMT_QUERY) {
2364                         if (file->f_mode & FMODE_WRITE) {
2365                                 stop_dac(state);
2366                                 dmabuf->ready = 0;
2367                                 if (val == AFMT_S16_LE)
2368                                         dmabuf->fmt |= TRIDENT_FMT_16BIT;
2369                                 else
2370                                         dmabuf->fmt &= ~TRIDENT_FMT_16BIT;
2371                         }
2372                         if (file->f_mode & FMODE_READ) {
2373                                 stop_adc(state);
2374                                 dmabuf->ready = 0;
2375                                 if (val == AFMT_S16_LE)
2376                                         dmabuf->fmt |= TRIDENT_FMT_16BIT;
2377                                 else
2378                                         dmabuf->fmt &= ~TRIDENT_FMT_16BIT;
2379                         }
2380                 }
2381                 unlock_set_fmt(state);
2382                 ret = put_user((dmabuf->fmt & TRIDENT_FMT_16BIT) ? AFMT_S16_LE : 
2383                                AFMT_U8, p);
2384                 break;
2385
2386         case SNDCTL_DSP_CHANNELS:
2387                 if (get_user(val, p)) {
2388                         ret = -EFAULT;
2389                         break;
2390                 }
2391                 if (val != 0) {
2392                         if ((ret = lock_set_fmt(state)) < 0)
2393                                 return ret;
2394
2395                         if (file->f_mode & FMODE_WRITE) {
2396                                 stop_dac(state);
2397                                 dmabuf->ready = 0;
2398
2399                                 //prevent from memory leak
2400                                 if ((state->chans_num > 2) && (state->chans_num != val)) {
2401                                         ali_free_other_states_resources(state);
2402                                         state->chans_num = 1;
2403                                 }
2404
2405                                 if (val >= 2) {
2406
2407                                         dmabuf->fmt |= TRIDENT_FMT_STEREO;
2408                                         if ((val == 6) && (state->card->pci_id == PCI_DEVICE_ID_ALI_5451)) {
2409                                                 if (card->rec_channel_use_count > 0) {
2410                                                         printk(KERN_ERR "trident: Record is "
2411                                                                "working on the card!\n");
2412                                                         ret = -EBUSY;
2413                                                         unlock_set_fmt(state);
2414                                                         break;
2415                                                 }
2416
2417                                                 ret = ali_setup_multi_channels(state->card, 6);
2418                                                 if (ret < 0) {
2419                                                         unlock_set_fmt(state);
2420                                                         break;
2421                                                 }
2422                                                 mutex_lock(&state->card->open_mutex);
2423                                                 ret = ali_allocate_other_states_resources(state, 6);
2424                                                 if (ret < 0) {
2425                                                         mutex_unlock(&state->card->open_mutex);
2426                                                         unlock_set_fmt(state);
2427                                                         break;
2428                                                 }
2429                                                 state->card->multi_channel_use_count++;
2430                                                 mutex_unlock(&state->card->open_mutex);
2431                                         } else
2432                                                 val = 2;        /*yield to 2-channels */
2433                                 } else
2434                                         dmabuf->fmt &= ~TRIDENT_FMT_STEREO;
2435                                 state->chans_num = val;
2436                         }
2437                         if (file->f_mode & FMODE_READ) {
2438                                 stop_adc(state);
2439                                 dmabuf->ready = 0;
2440                                 if (val >= 2) {
2441                                         if (!((file->f_mode & FMODE_WRITE) && 
2442                                               (val == 6)))
2443                                                 val = 2;
2444                                         dmabuf->fmt |= TRIDENT_FMT_STEREO;
2445                                 } else
2446                                         dmabuf->fmt &= ~TRIDENT_FMT_STEREO;
2447                                 state->chans_num = val;
2448                         }
2449                         unlock_set_fmt(state);
2450                 }
2451                 ret = put_user(val, p);
2452                 break;
2453
2454         case SNDCTL_DSP_POST:
2455                 /* Cause the working fragment to be output */
2456                 break;
2457
2458         case SNDCTL_DSP_SUBDIVIDE:
2459                 if (dmabuf->subdivision) {
2460                         ret = -EINVAL;
2461                         break;
2462                 }
2463                 if (get_user(val, p)) {
2464                         ret = -EFAULT;
2465                         break;
2466                 }
2467                 if (val != 1 && val != 2 && val != 4) {
2468                         ret = -EINVAL;
2469                         break;
2470                 }
2471                 dmabuf->subdivision = val;
2472                 break;
2473
2474         case SNDCTL_DSP_SETFRAGMENT:
2475                 if (get_user(val, p)) {
2476                         ret = -EFAULT;
2477                         break;
2478                 }
2479
2480                 dmabuf->ossfragshift = val & 0xffff;
2481                 dmabuf->ossmaxfrags = (val >> 16) & 0xffff;
2482                 if (dmabuf->ossfragshift < 4)
2483                         dmabuf->ossfragshift = 4;
2484                 if (dmabuf->ossfragshift > 15)
2485                         dmabuf->ossfragshift = 15;
2486                 if (dmabuf->ossmaxfrags < 4)
2487                         dmabuf->ossmaxfrags = 4;
2488
2489                 break;
2490
2491         case SNDCTL_DSP_GETOSPACE:
2492                 if (!(file->f_mode & FMODE_WRITE)) {
2493                         ret = -EINVAL;
2494                         break;
2495                 }
2496                 if (!dmabuf->ready && (val = prog_dmabuf_playback(state)) != 0) {
2497                         ret = val;
2498                         break;
2499                 }
2500                 spin_lock_irqsave(&state->card->lock, flags);
2501                 trident_update_ptr(state);
2502                 abinfo.fragsize = dmabuf->fragsize;
2503                 abinfo.bytes = dmabuf->dmasize - dmabuf->count;
2504                 abinfo.fragstotal = dmabuf->numfrag;
2505                 abinfo.fragments = abinfo.bytes >> dmabuf->fragshift;
2506                 spin_unlock_irqrestore(&state->card->lock, flags);
2507                 ret = copy_to_user(argp, &abinfo, sizeof (abinfo)) ? 
2508                         -EFAULT : 0;
2509                 break;
2510
2511         case SNDCTL_DSP_GETISPACE:
2512                 if (!(file->f_mode & FMODE_READ)) {
2513                         ret = -EINVAL;
2514                         break;
2515                 }
2516                 if (!dmabuf->ready && (val = prog_dmabuf_record(state)) != 0) {
2517                         ret = val;
2518                         break;
2519                 }
2520                 spin_lock_irqsave(&state->card->lock, flags);
2521                 trident_update_ptr(state);
2522                 abinfo.fragsize = dmabuf->fragsize;
2523                 abinfo.bytes = dmabuf->count;
2524                 abinfo.fragstotal = dmabuf->numfrag;
2525                 abinfo.fragments = abinfo.bytes >> dmabuf->fragshift;
2526                 spin_unlock_irqrestore(&state->card->lock, flags);
2527                 ret = copy_to_user(argp, &abinfo, sizeof (abinfo)) ? 
2528                         -EFAULT : 0;
2529                 break;
2530
2531         case SNDCTL_DSP_NONBLOCK:
2532                 file->f_flags |= O_NONBLOCK;
2533                 break;
2534
2535         case SNDCTL_DSP_GETCAPS:
2536                 ret = put_user(DSP_CAP_REALTIME | DSP_CAP_TRIGGER | 
2537                                DSP_CAP_MMAP | DSP_CAP_BIND, p);
2538                 break;
2539
2540         case SNDCTL_DSP_GETTRIGGER:
2541                 val = 0;
2542                 if ((file->f_mode & FMODE_READ) && dmabuf->enable)
2543                         val |= PCM_ENABLE_INPUT;
2544                 if ((file->f_mode & FMODE_WRITE) && dmabuf->enable)
2545                         val |= PCM_ENABLE_OUTPUT;
2546                 ret = put_user(val, p);
2547                 break;
2548
2549         case SNDCTL_DSP_SETTRIGGER:
2550                 if (get_user(val, p)) {
2551                         ret = -EFAULT;
2552                         break;
2553                 }
2554                 if (file->f_mode & FMODE_READ) {
2555                         if (val & PCM_ENABLE_INPUT) {
2556                                 if (!dmabuf->ready && 
2557                                     (ret = prog_dmabuf_record(state)))
2558                                         break;
2559                                 start_adc(state);
2560                         } else
2561                                 stop_adc(state);
2562                 }
2563                 if (file->f_mode & FMODE_WRITE) {
2564                         if (val & PCM_ENABLE_OUTPUT) {
2565                                 if (!dmabuf->ready && 
2566                                     (ret = prog_dmabuf_playback(state)))
2567                                         break;
2568                                 start_dac(state);
2569                         } else
2570                                 stop_dac(state);
2571                 }
2572                 break;
2573
2574         case SNDCTL_DSP_GETIPTR:
2575                 if (!(file->f_mode & FMODE_READ)) {
2576                         ret = -EINVAL;
2577                         break;
2578                 }
2579                 if (!dmabuf->ready && (val = prog_dmabuf_record(state))
2580                     != 0) {
2581                         ret = val;
2582                         break;
2583                 }
2584                 spin_lock_irqsave(&state->card->lock, flags);
2585                 trident_update_ptr(state);
2586                 cinfo.bytes = dmabuf->total_bytes;
2587                 cinfo.blocks = dmabuf->count >> dmabuf->fragshift;
2588                 cinfo.ptr = dmabuf->hwptr;
2589                 if (dmabuf->mapped)
2590                         dmabuf->count &= dmabuf->fragsize - 1;
2591                 spin_unlock_irqrestore(&state->card->lock, flags);
2592                 ret = copy_to_user(argp, &cinfo, sizeof (cinfo)) ? 
2593                         -EFAULT : 0;
2594                 break;
2595
2596         case SNDCTL_DSP_GETOPTR:
2597                 if (!(file->f_mode & FMODE_WRITE)) {
2598                         ret = -EINVAL;
2599                         break;
2600                 }
2601                 if (!dmabuf->ready && (val = prog_dmabuf_playback(state))
2602                     != 0) {
2603                         ret = val;
2604                         break;
2605                 }
2606
2607                 spin_lock_irqsave(&state->card->lock, flags);
2608                 trident_update_ptr(state);
2609                 cinfo.bytes = dmabuf->total_bytes;
2610                 cinfo.blocks = dmabuf->count >> dmabuf->fragshift;
2611                 cinfo.ptr = dmabuf->hwptr;
2612                 if (dmabuf->mapped)
2613                         dmabuf->count &= dmabuf->fragsize - 1;
2614                 spin_unlock_irqrestore(&state->card->lock, flags);
2615                 ret = copy_to_user(argp, &cinfo, sizeof (cinfo)) ? 
2616                         -EFAULT : 0;
2617                 break;
2618
2619         case SNDCTL_DSP_SETDUPLEX:
2620                 ret = -EINVAL;
2621                 break;
2622
2623         case SNDCTL_DSP_GETODELAY:
2624                 if (!(file->f_mode & FMODE_WRITE)) {
2625                         ret = -EINVAL;
2626                         break;
2627                 }
2628                 if (!dmabuf->ready && (val = prog_dmabuf_playback(state)) != 0) {
2629                         ret = val;
2630                         break;
2631                 }
2632                 spin_lock_irqsave(&state->card->lock, flags);
2633                 trident_update_ptr(state);
2634                 val = dmabuf->count;
2635                 spin_unlock_irqrestore(&state->card->lock, flags);
2636                 ret = put_user(val, p);
2637                 break;
2638
2639         case SOUND_PCM_READ_RATE:
2640                 ret = put_user(dmabuf->rate, p);
2641                 break;
2642
2643         case SOUND_PCM_READ_CHANNELS:
2644                 ret = put_user((dmabuf->fmt & TRIDENT_FMT_STEREO) ? 2 : 1, 
2645                                p);
2646                 break;
2647
2648         case SOUND_PCM_READ_BITS:
2649                 ret = put_user((dmabuf->fmt & TRIDENT_FMT_16BIT) ? AFMT_S16_LE : 
2650                                AFMT_U8, p);
2651                 break;
2652
2653         case SNDCTL_DSP_GETCHANNELMASK:
2654                 ret = put_user(DSP_BIND_FRONT | DSP_BIND_SURR | 
2655                                DSP_BIND_CENTER_LFE,  p);
2656                 break;
2657
2658         case SNDCTL_DSP_BIND_CHANNEL:
2659                 if (state->card->pci_id != PCI_DEVICE_ID_SI_7018) {
2660                         ret = -EINVAL;
2661                         break;
2662                 }
2663
2664                 if (get_user(val, p)) {
2665                         ret = -EFAULT;
2666                         break;
2667                 }
2668                 if (val == DSP_BIND_QUERY) {
2669                         val = dmabuf->channel->attribute | 0x3c00;
2670                         val = attr2mask[val >> 8];
2671                 } else {
2672                         dmabuf->ready = 0;
2673                         if (file->f_mode & FMODE_READ)
2674                                 dmabuf->channel->attribute = (CHANNEL_REC | 
2675                                                               SRC_ENABLE);
2676                         if (file->f_mode & FMODE_WRITE)
2677                                 dmabuf->channel->attribute = (CHANNEL_SPC_PB | 
2678                                                               SRC_ENABLE);
2679                         dmabuf->channel->attribute |= mask2attr[ffs(val)];
2680                 }
2681                 ret = put_user(val, p);
2682                 break;
2683
2684         case SNDCTL_DSP_MAPINBUF:
2685         case SNDCTL_DSP_MAPOUTBUF:
2686         case SNDCTL_DSP_SETSYNCRO:
2687         case SOUND_PCM_WRITE_FILTER:
2688         case SOUND_PCM_READ_FILTER:
2689         default:
2690                 ret = -EINVAL;
2691                 break;
2692
2693         }
2694         return ret;
2695 }
2696
2697 static int
2698 trident_open(struct inode *inode, struct file *file)
2699 {
2700         int i = 0;
2701         int minor = iminor(inode);
2702         struct trident_card *card = devs;
2703         struct trident_state *state = NULL;
2704         struct dmabuf *dmabuf = NULL;
2705
2706         /* Added by Matt Wu 01-05-2001 */
2707         /* TODO: there's some redundacy here wrt the check below */
2708         /* for multi_use_count > 0. Should we return -EBUSY or find */
2709         /* a different card? for now, don't break current behaviour */
2710         /* -- mulix */
2711         if (file->f_mode & FMODE_READ) {
2712                 if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
2713                         if (card->multi_channel_use_count > 0)
2714                                 return -EBUSY;
2715                 }
2716         }
2717
2718         /* find an available virtual channel (instance of /dev/dsp) */
2719         while (card != NULL) {
2720                 mutex_lock(&card->open_mutex);
2721                 if (file->f_mode & FMODE_READ) {
2722                         /* Skip opens on cards that are in 6 channel mode */
2723                         if (card->multi_channel_use_count > 0) {
2724                                 mutex_unlock(&card->open_mutex);
2725                                 card = card->next;
2726                                 continue;
2727                         }
2728                 }
2729                 for (i = 0; i < NR_HW_CH; i++) {
2730                         if (card->states[i] == NULL) {
2731                                 state = card->states[i] = kzalloc(sizeof(*state), GFP_KERNEL);
2732                                 if (state == NULL) {
2733                                         mutex_unlock(&card->open_mutex);
2734                                         return -ENOMEM;
2735                                 }
2736                                 mutex_init(&state->sem);
2737                                 dmabuf = &state->dmabuf;
2738                                 goto found_virt;
2739                         }
2740                 }
2741                 mutex_unlock(&card->open_mutex);
2742                 card = card->next;
2743         }
2744         /* no more virtual channel avaiable */
2745         if (!state) {
2746                 return -ENODEV;
2747         }
2748       found_virt:
2749         /* found a free virtual channel, allocate hardware channels */
2750         if (file->f_mode & FMODE_READ)
2751                 dmabuf->channel = card->alloc_rec_pcm_channel(card);
2752         else
2753                 dmabuf->channel = card->alloc_pcm_channel(card);
2754
2755         if (dmabuf->channel == NULL) {
2756                 kfree(card->states[i]);
2757                 card->states[i] = NULL;
2758                 return -ENODEV;
2759         }
2760
2761         /* initialize the virtual channel */
2762         state->virt = i;
2763         state->card = card;
2764         state->magic = TRIDENT_STATE_MAGIC;
2765         init_waitqueue_head(&dmabuf->wait);
2766         file->private_data = state;
2767
2768         /* set default sample format. According to OSS Programmer's */ 
2769         /* Guide  /dev/dsp should be default to unsigned 8-bits, mono, */ 
2770         /* with sample rate 8kHz and /dev/dspW will accept 16-bits sample */
2771         if (file->f_mode & FMODE_WRITE) {
2772                 dmabuf->fmt &= ~TRIDENT_FMT_MASK;
2773                 if ((minor & 0x0f) == SND_DEV_DSP16)
2774                         dmabuf->fmt |= TRIDENT_FMT_16BIT;
2775                 dmabuf->ossfragshift = 0;
2776                 dmabuf->ossmaxfrags = 0;
2777                 dmabuf->subdivision = 0;
2778                 if (card->pci_id == PCI_DEVICE_ID_SI_7018) {
2779                         /* set default channel attribute to normal playback */
2780                         dmabuf->channel->attribute = CHANNEL_PB;
2781                 }
2782                 trident_set_dac_rate(state, 8000);
2783         }
2784
2785         if (file->f_mode & FMODE_READ) {
2786                 /* FIXME: Trident 4d can only record in signed 16-bits stereo, */ 
2787                 /* 48kHz sample, to be dealed with in trident_set_adc_rate() ?? */
2788                 dmabuf->fmt &= ~TRIDENT_FMT_MASK;
2789                 if ((minor & 0x0f) == SND_DEV_DSP16)
2790                         dmabuf->fmt |= TRIDENT_FMT_16BIT;
2791                 dmabuf->ossfragshift = 0;
2792                 dmabuf->ossmaxfrags = 0;
2793                 dmabuf->subdivision = 0;
2794                 if (card->pci_id == PCI_DEVICE_ID_SI_7018) {
2795                         /* set default channel attribute to 0x8a80, record from
2796                            PCM L/R FIFO and mono = (left + right + 1)/2 */
2797                         dmabuf->channel->attribute = (CHANNEL_REC | PCM_LR | 
2798                                                       MONO_MIX);
2799                 }
2800                 trident_set_adc_rate(state, 8000);
2801
2802                 /* Added by Matt Wu 01-05-2001 */
2803                 if (card->pci_id == PCI_DEVICE_ID_ALI_5451)
2804                         card->rec_channel_use_count++;
2805         }
2806
2807         state->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2808         mutex_unlock(&card->open_mutex);
2809
2810         pr_debug("trident: open virtual channel %d, hard channel %d\n",
2811                  state->virt, dmabuf->channel->num);
2812
2813         return nonseekable_open(inode, file);
2814 }
2815
2816 static int
2817 trident_release(struct inode *inode, struct file *file)
2818 {
2819         struct trident_state *state = (struct trident_state *)file->private_data;
2820         struct trident_card *card;
2821         struct dmabuf *dmabuf;
2822
2823         VALIDATE_STATE(state);
2824
2825         card = state->card;
2826         dmabuf = &state->dmabuf;
2827
2828         if (file->f_mode & FMODE_WRITE) {
2829                 trident_clear_tail(state);
2830                 drain_dac(state, file->f_flags & O_NONBLOCK);
2831         }
2832
2833         pr_debug("trident: closing virtual channel %d, hard channel %d\n",
2834                  state->virt, dmabuf->channel->num);
2835
2836         /* stop DMA state machine and free DMA buffers/channels */
2837         mutex_lock(&card->open_mutex);
2838
2839         if (file->f_mode & FMODE_WRITE) {
2840                 stop_dac(state);
2841                 dealloc_dmabuf(&state->dmabuf, state->card->pci_dev);
2842                 state->card->free_pcm_channel(state->card, dmabuf->channel->num);
2843
2844                 /* Added by Matt Wu */
2845                 if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
2846                         if (state->chans_num > 2) {
2847                                 if (card->multi_channel_use_count-- < 0)
2848                                         card->multi_channel_use_count = 0;
2849                                 if (card->multi_channel_use_count == 0)
2850                                         ali_close_multi_channels();
2851                                 ali_free_other_states_resources(state);
2852                         }
2853                 }
2854         }
2855         if (file->f_mode & FMODE_READ) {
2856                 stop_adc(state);
2857                 dealloc_dmabuf(&state->dmabuf, state->card->pci_dev);
2858                 state->card->free_pcm_channel(state->card, dmabuf->channel->num);
2859
2860                 /* Added by Matt Wu */
2861                 if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
2862                         if (card->rec_channel_use_count-- < 0)
2863                                 card->rec_channel_use_count = 0;
2864                 }
2865         }
2866
2867         card->states[state->virt] = NULL;
2868         kfree(state);
2869
2870         /* we're covered by the open_mutex */
2871         mutex_unlock(&card->open_mutex);
2872
2873         return 0;
2874 }
2875
2876 static /*const */ struct file_operations trident_audio_fops = {
2877         .owner = THIS_MODULE,
2878         .llseek = no_llseek,
2879         .read = trident_read,
2880         .write = trident_write,
2881         .poll = trident_poll,
2882         .ioctl = trident_ioctl,
2883         .mmap = trident_mmap,
2884         .open = trident_open,
2885         .release = trident_release,
2886 };
2887
2888 /* trident specific AC97 functions */
2889 /* Write AC97 codec registers */
2890 static void
2891 trident_ac97_set(struct ac97_codec *codec, u8 reg, u16 val)
2892 {
2893         struct trident_card *card = (struct trident_card *)codec->private_data;
2894         unsigned int address, mask, busy;
2895         unsigned short count = 0xffff;
2896         unsigned long flags;
2897         u32 data;
2898
2899         data = ((u32) val) << 16;
2900
2901         switch (card->pci_id) {
2902         default:
2903         case PCI_DEVICE_ID_SI_7018:
2904                 address = SI_AC97_WRITE;
2905                 mask = SI_AC97_BUSY_WRITE | SI_AC97_AUDIO_BUSY;
2906                 if (codec->id)
2907                         mask |= SI_AC97_SECONDARY;
2908                 busy = SI_AC97_BUSY_WRITE;
2909                 break;
2910         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
2911                 address = DX_ACR0_AC97_W;
2912                 mask = busy = DX_AC97_BUSY_WRITE;
2913                 break;
2914         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
2915                 address = NX_ACR1_AC97_W;
2916                 mask = NX_AC97_BUSY_WRITE;
2917                 if (codec->id)
2918                         mask |= NX_AC97_WRITE_SECONDARY;
2919                 busy = NX_AC97_BUSY_WRITE;
2920                 break;
2921         case PCI_DEVICE_ID_INTERG_5050:
2922                 address = SI_AC97_WRITE;
2923                 mask = busy = SI_AC97_BUSY_WRITE;
2924                 if (codec->id)
2925                         mask |= SI_AC97_SECONDARY;
2926                 break;
2927         }
2928
2929         spin_lock_irqsave(&card->lock, flags);
2930         do {
2931                 if ((inw(TRID_REG(card, address)) & busy) == 0)
2932                         break;
2933         } while (count--);
2934
2935         data |= (mask | (reg & AC97_REG_ADDR));
2936
2937         if (count == 0) {
2938                 printk(KERN_ERR "trident: AC97 CODEC write timed out.\n");
2939                 spin_unlock_irqrestore(&card->lock, flags);
2940                 return;
2941         }
2942
2943         outl(data, TRID_REG(card, address));
2944         spin_unlock_irqrestore(&card->lock, flags);
2945 }
2946
2947 /* Read AC97 codec registers */
2948 static u16
2949 trident_ac97_get(struct ac97_codec *codec, u8 reg)
2950 {
2951         struct trident_card *card = (struct trident_card *)codec->private_data;
2952         unsigned int address, mask, busy;
2953         unsigned short count = 0xffff;
2954         unsigned long flags;
2955         u32 data;
2956
2957         switch (card->pci_id) {
2958         default:
2959         case PCI_DEVICE_ID_SI_7018:
2960                 address = SI_AC97_READ;
2961                 mask = SI_AC97_BUSY_READ | SI_AC97_AUDIO_BUSY;
2962                 if (codec->id)
2963                         mask |= SI_AC97_SECONDARY;
2964                 busy = SI_AC97_BUSY_READ;
2965                 break;
2966         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
2967                 address = DX_ACR1_AC97_R;
2968                 mask = busy = DX_AC97_BUSY_READ;
2969                 break;
2970         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
2971                 if (codec->id)
2972                         address = NX_ACR3_AC97_R_SECONDARY;
2973                 else
2974                         address = NX_ACR2_AC97_R_PRIMARY;
2975                 mask = NX_AC97_BUSY_READ;
2976                 busy = NX_AC97_BUSY_READ | NX_AC97_BUSY_DATA;
2977                 break;
2978         case PCI_DEVICE_ID_INTERG_5050:
2979                 address = SI_AC97_READ;
2980                 mask = busy = SI_AC97_BUSY_READ;
2981                 if (codec->id)
2982                         mask |= SI_AC97_SECONDARY;
2983                 break;
2984         }
2985
2986         data = (mask | (reg & AC97_REG_ADDR));
2987
2988         spin_lock_irqsave(&card->lock, flags);
2989         outl(data, TRID_REG(card, address));
2990         do {
2991                 data = inl(TRID_REG(card, address));
2992                 if ((data & busy) == 0)
2993                         break;
2994         } while (count--);
2995         spin_unlock_irqrestore(&card->lock, flags);
2996
2997         if (count == 0) {
2998                 printk(KERN_ERR "trident: AC97 CODEC read timed out.\n");
2999                 data = 0;
3000         }
3001         return ((u16) (data >> 16));
3002 }
3003
3004 /* rewrite ac97 read and write mixer register by hulei for ALI*/
3005 static int
3006 acquirecodecaccess(struct trident_card *card)
3007 {
3008         u16 wsemamask = 0x6000; /* bit 14..13 */
3009         u16 wsemabits;
3010         u16 wcontrol;
3011         int block = 0;
3012         int ncount = 25;
3013         while (1) {
3014                 wcontrol = inw(TRID_REG(card, ALI_AC97_WRITE));
3015                 wsemabits = wcontrol & wsemamask;
3016
3017                 if (wsemabits == 0x4000)
3018                         return 1;       /* 0x4000 is audio ,then success */
3019                 if (ncount-- < 0)
3020                         break;
3021                 if (wsemabits == 0) {
3022                       unlock:
3023                         outl(((u32) (wcontrol & 0x1eff) | 0x00004000), 
3024                              TRID_REG(card, ALI_AC97_WRITE));
3025                         continue;
3026                 }
3027                 udelay(20);
3028         }
3029         if (!block) {
3030                 pr_debug("accesscodecsemaphore: try unlock\n");
3031                 block = 1;
3032                 goto unlock;
3033         }
3034         return 0;
3035 }
3036
3037 static void
3038 releasecodecaccess(struct trident_card *card)
3039 {
3040         unsigned long wcontrol;
3041         wcontrol = inl(TRID_REG(card, ALI_AC97_WRITE));
3042         outl((wcontrol & 0xffff1eff), TRID_REG(card, ALI_AC97_WRITE));
3043 }
3044
3045 static int
3046 waitforstimertick(struct trident_card *card)
3047 {
3048         unsigned long chk1, chk2;
3049         unsigned int wcount = 0xffff;
3050         chk1 = inl(TRID_REG(card, ALI_STIMER));
3051
3052         while (1) {
3053                 chk2 = inl(TRID_REG(card, ALI_STIMER));
3054                 if ((wcount > 0) && chk1 != chk2)
3055                         return 1;
3056                 if (wcount <= 0)
3057                         break;
3058                 udelay(50);
3059         }
3060         return 0;
3061 }
3062
3063 /* Read AC97 codec registers for ALi*/
3064 static u16
3065 ali_ac97_get(struct trident_card *card, int secondary, u8 reg)
3066 {
3067         unsigned int address, mask;
3068         unsigned int ncount;
3069         unsigned long aud_reg;
3070         u32 data;
3071         u16 wcontrol;
3072         unsigned long flags;
3073
3074         if (!card)
3075                 BUG();
3076
3077         address = ALI_AC97_READ;
3078         if (card->revision == ALI_5451_V02) {
3079                 address = ALI_AC97_WRITE;
3080         }
3081         mask = ALI_AC97_READ_ACTION | ALI_AC97_AUDIO_BUSY;
3082         if (secondary)
3083                 mask |= ALI_AC97_SECONDARY;
3084
3085         spin_lock_irqsave(&card->lock, flags);
3086
3087         if (!acquirecodecaccess(card))
3088                 printk(KERN_ERR "access codec fail\n");
3089
3090         wcontrol = inw(TRID_REG(card, ALI_AC97_WRITE));
3091         wcontrol &= 0xfe00;
3092         wcontrol |= (0x8000 | reg);
3093         outw(wcontrol, TRID_REG(card, ALI_AC97_WRITE));
3094
3095         data = (mask | (reg & AC97_REG_ADDR));
3096
3097         if (!waitforstimertick(card)) {
3098                 printk(KERN_ERR "ali_ac97_read: BIT_CLOCK is dead\n");
3099                 goto releasecodec;
3100         }
3101
3102         udelay(20);
3103
3104         ncount = 10;
3105
3106         while (1) {
3107                 if ((inw(TRID_REG(card, ALI_AC97_WRITE)) & ALI_AC97_BUSY_READ) 
3108                     != 0)
3109                         break;
3110                 if (ncount <= 0)
3111                         break;
3112                 if (ncount-- == 1) {
3113                         pr_debug("ali_ac97_read :try clear busy flag\n");
3114                         aud_reg = inl(TRID_REG(card, ALI_AC97_WRITE));
3115                         outl((aud_reg & 0xffff7fff), 
3116                              TRID_REG(card, ALI_AC97_WRITE));
3117                 }
3118                 udelay(10);
3119         }
3120
3121         data = inl(TRID_REG(card, address));
3122
3123         spin_unlock_irqrestore(&card->lock, flags);
3124
3125         return ((u16) (data >> 16));
3126
3127       releasecodec:
3128         releasecodecaccess(card);
3129         spin_unlock_irqrestore(&card->lock, flags);
3130         printk(KERN_ERR "ali_ac97_read: AC97 CODEC read timed out.\n");
3131         return 0;
3132 }
3133
3134 /* Write AC97 codec registers for hulei*/
3135 static void
3136 ali_ac97_set(struct trident_card *card, int secondary, u8 reg, u16 val)
3137 {
3138         unsigned int address, mask;
3139         unsigned int ncount;
3140         u32 data;
3141         u16 wcontrol;
3142         unsigned long flags;
3143
3144         data = ((u32) val) << 16;
3145
3146         if (!card)
3147                 BUG();
3148
3149         address = ALI_AC97_WRITE;
3150         mask = ALI_AC97_WRITE_ACTION | ALI_AC97_AUDIO_BUSY;
3151         if (secondary)
3152                 mask |= ALI_AC97_SECONDARY;
3153         if (card->revision == ALI_5451_V02)
3154                 mask |= ALI_AC97_WRITE_MIXER_REGISTER;
3155
3156         spin_lock_irqsave(&card->lock, flags);
3157         if (!acquirecodecaccess(card))
3158                 printk(KERN_ERR "ali_ac97_write: access codec fail\n");
3159
3160         wcontrol = inw(TRID_REG(card, ALI_AC97_WRITE));
3161         wcontrol &= 0xff00;
3162         wcontrol |= (0x8100 | reg); /* bit 8=1: (ali1535 )reserved/ */ 
3163                                     /* ali1535+ write */
3164         outl((data | wcontrol), TRID_REG(card, ALI_AC97_WRITE));
3165
3166         if (!waitforstimertick(card)) {
3167                 printk(KERN_ERR "BIT_CLOCK is dead\n");
3168                 goto releasecodec;
3169         }
3170
3171         ncount = 10;
3172         while (1) {
3173                 wcontrol = inw(TRID_REG(card, ALI_AC97_WRITE));
3174                 if (!(wcontrol & 0x8000))
3175                         break;
3176                 if (ncount <= 0)
3177                         break;
3178                 if (ncount-- == 1) {
3179                         pr_debug("ali_ac97_set :try clear busy flag!!\n");
3180                         outw(wcontrol & 0x7fff, 
3181                              TRID_REG(card, ALI_AC97_WRITE));
3182                 }
3183                 udelay(10);
3184         }
3185
3186       releasecodec:
3187         releasecodecaccess(card);
3188         spin_unlock_irqrestore(&card->lock, flags);
3189         return;
3190 }
3191
3192 static void
3193 ali_enable_special_channel(struct trident_state *stat)
3194 {
3195         struct trident_card *card = stat->card;
3196         unsigned long s_channels;
3197
3198         s_channels = inl(TRID_REG(card, ALI_GLOBAL_CONTROL));
3199         s_channels |= (1 << stat->dmabuf.channel->num);
3200         outl(s_channels, TRID_REG(card, ALI_GLOBAL_CONTROL));
3201 }
3202
3203 static u16
3204 ali_ac97_read(struct ac97_codec *codec, u8 reg)
3205 {
3206         int id;
3207         u16 data;
3208         struct trident_card *card = NULL;
3209
3210         /* Added by Matt Wu */
3211         if (!codec)
3212                 BUG();
3213
3214         card = (struct trident_card *) codec->private_data;
3215
3216         if (!card->mixer_regs_ready)
3217                 return ali_ac97_get(card, codec->id, reg);
3218
3219         /*
3220          *      FIXME: need to stop this caching some registers
3221          */
3222         if (codec->id)
3223                 id = 1;
3224         else
3225                 id = 0;
3226
3227         data = card->mixer_regs[reg / 2][id];
3228         return data;
3229 }
3230
3231 static void
3232 ali_ac97_write(struct ac97_codec *codec, u8 reg, u16 val)
3233 {
3234         int id;
3235         struct trident_card *card;
3236
3237         /*  Added by Matt Wu */
3238         if (!codec)
3239                 BUG();
3240
3241         card = (struct trident_card *) codec->private_data;
3242
3243         if (!card->mixer_regs_ready) {
3244                 ali_ac97_set(card, codec->id, reg, val);
3245                 return;
3246         }
3247
3248         if (codec->id)
3249                 id = 1;
3250         else
3251                 id = 0;
3252
3253         card->mixer_regs[reg / 2][id] = val;
3254         ali_ac97_set(card, codec->id, reg, val);
3255 }
3256
3257 /*
3258 flag:   ALI_SPDIF_OUT_TO_SPDIF_OUT
3259         ALI_PCM_TO_SPDIF_OUT
3260 */
3261
3262 static void
3263 ali_setup_spdif_out(struct trident_card *card, int flag)
3264 {
3265         unsigned long spdif;
3266         unsigned char ch;
3267
3268         char temp;
3269         struct pci_dev *pci_dev = NULL;
3270
3271         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
3272                                  pci_dev);
3273         if (pci_dev == NULL)
3274                 return;
3275         pci_read_config_byte(pci_dev, 0x61, &temp);
3276         temp |= 0x40;
3277         pci_write_config_byte(pci_dev, 0x61, temp);
3278         pci_read_config_byte(pci_dev, 0x7d, &temp);
3279         temp |= 0x01;
3280         pci_write_config_byte(pci_dev, 0x7d, temp);
3281         pci_read_config_byte(pci_dev, 0x7e, &temp);
3282         temp &= (~0x20);
3283         temp |= 0x10;
3284         pci_write_config_byte(pci_dev, 0x7e, temp);
3285
3286         pci_dev_put(pci_dev);
3287
3288         ch = inb(TRID_REG(card, ALI_SCTRL));
3289         outb(ch | ALI_SPDIF_OUT_ENABLE, TRID_REG(card, ALI_SCTRL));
3290         ch = inb(TRID_REG(card, ALI_SPDIF_CTRL));
3291         outb(ch & ALI_SPDIF_OUT_CH_STATUS, TRID_REG(card, ALI_SPDIF_CTRL));
3292
3293         if (flag & ALI_SPDIF_OUT_TO_SPDIF_OUT) {
3294                 spdif = inw(TRID_REG(card, ALI_GLOBAL_CONTROL));
3295                 spdif |= ALI_SPDIF_OUT_CH_ENABLE;
3296                 spdif &= ALI_SPDIF_OUT_SEL_SPDIF;
3297                 outw(spdif, TRID_REG(card, ALI_GLOBAL_CONTROL));
3298                 spdif = inw(TRID_REG(card, ALI_SPDIF_CS));
3299                 if (flag & ALI_SPDIF_OUT_NON_PCM)
3300                         spdif |= 0x0002;
3301                 else
3302                         spdif &= (~0x0002);
3303                 outw(spdif, TRID_REG(card, ALI_SPDIF_CS));
3304         } else {
3305                 spdif = inw(TRID_REG(card, ALI_GLOBAL_CONTROL));
3306                 spdif |= ALI_SPDIF_OUT_SEL_PCM;
3307                 outw(spdif, TRID_REG(card, ALI_GLOBAL_CONTROL));
3308         }
3309 }
3310
3311 static void
3312 ali_disable_special_channel(struct trident_card *card, int ch)
3313 {
3314         unsigned long sc;
3315
3316         sc = inl(TRID_REG(card, ALI_GLOBAL_CONTROL));
3317         sc &= ~(1 << ch);
3318         outl(sc, TRID_REG(card, ALI_GLOBAL_CONTROL));
3319 }
3320
3321 static void
3322 ali_disable_spdif_in(struct trident_card *card)
3323 {
3324         unsigned long spdif;
3325
3326         spdif = inl(TRID_REG(card, ALI_GLOBAL_CONTROL));
3327         spdif &= (~ALI_SPDIF_IN_SUPPORT);
3328         outl(spdif, TRID_REG(card, ALI_GLOBAL_CONTROL));
3329
3330         ali_disable_special_channel(card, ALI_SPDIF_IN_CHANNEL);
3331 }
3332
3333 static void
3334 ali_setup_spdif_in(struct trident_card *card)
3335 {
3336         unsigned long spdif;
3337
3338         //Set SPDIF IN Supported
3339         spdif = inl(TRID_REG(card, ALI_GLOBAL_CONTROL));
3340         spdif |= ALI_SPDIF_IN_SUPPORT;
3341         outl(spdif, TRID_REG(card, ALI_GLOBAL_CONTROL));
3342
3343         //Set SPDIF IN Rec
3344         spdif = inl(TRID_REG(card, ALI_GLOBAL_CONTROL));
3345         spdif |= ALI_SPDIF_IN_CH_ENABLE;
3346         outl(spdif, TRID_REG(card, ALI_GLOBAL_CONTROL));
3347
3348         spdif = inb(TRID_REG(card, ALI_SPDIF_CTRL));
3349         spdif |= ALI_SPDIF_IN_CH_STATUS;
3350         outb(spdif, TRID_REG(card, ALI_SPDIF_CTRL));
3351 /*
3352         spdif = inb(TRID_REG(card, ALI_SPDIF_CTRL));
3353         spdif |= ALI_SPDIF_IN_FUNC_ENABLE;
3354         outb(spdif, TRID_REG(card, ALI_SPDIF_CTRL));
3355 */
3356 }
3357
3358 static void
3359 ali_delay(struct trident_card *card, int interval)
3360 {
3361         unsigned long begintimer, currenttimer;
3362
3363         begintimer = inl(TRID_REG(card, ALI_STIMER));
3364         currenttimer = inl(TRID_REG(card, ALI_STIMER));
3365
3366         while (currenttimer < begintimer + interval)
3367                 currenttimer = inl(TRID_REG(card, ALI_STIMER));
3368 }
3369
3370 static void
3371 ali_detect_spdif_rate(struct trident_card *card)
3372 {
3373         u16 wval = 0;
3374         u16 count = 0;
3375         u8 bval = 0, R1 = 0, R2 = 0;
3376
3377         bval = inb(TRID_REG(card, ALI_SPDIF_CTRL));
3378         bval |= 0x02;
3379         outb(bval, TRID_REG(card, ALI_SPDIF_CTRL));
3380
3381         bval = inb(TRID_REG(card, ALI_SPDIF_CTRL + 1));
3382         bval |= 0x1F;
3383         outb(bval, TRID_REG(card, ALI_SPDIF_CTRL + 1));
3384
3385         while (((R1 < 0x0B) || (R1 > 0x0E)) && (R1 != 0x12) && 
3386                count <= 50000) {
3387                 count++;
3388
3389                 ali_delay(card, 6);
3390
3391                 bval = inb(TRID_REG(card, ALI_SPDIF_CTRL + 1));
3392                 R1 = bval & 0x1F;
3393         }
3394
3395         if (count > 50000) {
3396                 printk(KERN_WARNING "trident: Error in "
3397                        "ali_detect_spdif_rate!\n");
3398                 return;
3399         }
3400
3401         count = 0;
3402
3403         while (count <= 50000) {
3404                 count++;
3405
3406                 ali_delay(card, 6);
3407
3408                 bval = inb(TRID_REG(card, ALI_SPDIF_CTRL + 1));
3409                 R2 = bval & 0x1F;
3410
3411                 if (R2 != R1)
3412                         R1 = R2;
3413                 else
3414                         break;
3415         }
3416
3417         if (count > 50000) {
3418                 printk(KERN_WARNING "trident: Error in "
3419                        "ali_detect_spdif_rate!\n");
3420                 return;
3421         }
3422
3423         switch (R2) {
3424         case 0x0b:
3425         case 0x0c:
3426         case 0x0d:
3427         case 0x0e:
3428                 wval = inw(TRID_REG(card, ALI_SPDIF_CTRL + 2));
3429                 wval &= 0xE0F0;
3430                 wval |= (u16) 0x09 << 8 | (u16) 0x05;
3431                 outw(wval, TRID_REG(card, ALI_SPDIF_CTRL + 2));
3432
3433                 bval = inb(TRID_REG(card, ALI_SPDIF_CS + 3)) & 0xF0;
3434                 outb(bval | 0x02, TRID_REG(card, ALI_SPDIF_CS + 3));
3435                 break;
3436
3437         case 0x12:
3438                 wval = inw(TRID_REG(card, ALI_SPDIF_CTRL + 2));
3439                 wval &= 0xE0F0;
3440                 wval |= (u16) 0x0E << 8 | (u16) 0x08;
3441                 outw(wval, TRID_REG(card, ALI_SPDIF_CTRL + 2));
3442
3443                 bval = inb(TRID_REG(card, ALI_SPDIF_CS + 3)) & 0xF0;
3444                 outb(bval | 0x03, TRID_REG(card, ALI_SPDIF_CS + 3));
3445                 break;
3446
3447         default:
3448                 break;
3449         }
3450
3451 }
3452
3453 static unsigned int
3454 ali_get_spdif_in_rate(struct trident_card *card)
3455 {
3456         u32 dwRate = 0;
3457         u8 bval = 0;
3458
3459         ali_detect_spdif_rate(card);
3460
3461         bval = inb(TRID_REG(card, ALI_SPDIF_CTRL));
3462         bval &= 0x7F;
3463         bval |= 0x40;
3464         outb(bval, TRID_REG(card, ALI_SPDIF_CTRL));
3465
3466         bval = inb(TRID_REG(card, ALI_SPDIF_CS + 3));
3467         bval &= 0x0F;
3468
3469         switch (bval) {
3470         case 0:
3471                 dwRate = 44100;
3472                 break;
3473         case 1:
3474                 dwRate = 48000;
3475                 break;
3476         case 2:
3477                 dwRate = 32000;
3478                 break;
3479         default:
3480                 // Error occurs
3481                 break;
3482         }
3483
3484         return dwRate;
3485
3486 }
3487
3488 static int
3489 ali_close_multi_channels(void)
3490 {
3491         char temp = 0;
3492         struct pci_dev *pci_dev = NULL;
3493
3494         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
3495                                  pci_dev);
3496         if (pci_dev == NULL)
3497                 return -1;
3498
3499         pci_read_config_byte(pci_dev, 0x59, &temp);
3500         temp &= ~0x80;
3501         pci_write_config_byte(pci_dev, 0x59, temp);
3502
3503         pci_dev_put(pci_dev);
3504
3505         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101,
3506                                  NULL);
3507         if (pci_dev == NULL)
3508                 return -1;
3509
3510         pci_read_config_byte(pci_dev, 0xB8, &temp);
3511         temp &= ~0x20;
3512         pci_write_config_byte(pci_dev, 0xB8, temp);
3513
3514         pci_dev_put(pci_dev);
3515
3516         return 0;
3517 }
3518
3519 static int
3520 ali_setup_multi_channels(struct trident_card *card, int chan_nums)
3521 {
3522         unsigned long dwValue;
3523         char temp = 0;
3524         struct pci_dev *pci_dev = NULL;
3525
3526         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
3527                                  pci_dev);
3528         if (pci_dev == NULL)
3529                 return -1;
3530         pci_read_config_byte(pci_dev, 0x59, &temp);
3531         temp |= 0x80;
3532         pci_write_config_byte(pci_dev, 0x59, temp);
3533
3534         pci_dev_put(pci_dev);
3535
3536         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101,
3537                                  NULL);
3538         if (pci_dev == NULL)
3539                 return -1;
3540         pci_read_config_byte(pci_dev, (int) 0xB8, &temp);
3541         temp |= 0x20;
3542         pci_write_config_byte(pci_dev, (int) 0xB8, (u8) temp);
3543
3544         pci_dev_put(pci_dev);
3545
3546         if (chan_nums == 6) {
3547                 dwValue = inl(TRID_REG(card, ALI_SCTRL)) | 0x000f0000;
3548                 outl(dwValue, TRID_REG(card, ALI_SCTRL));
3549                 mdelay(4);
3550                 dwValue = inl(TRID_REG(card, ALI_SCTRL));
3551                 if (dwValue & 0x2000000) {
3552                         ali_ac97_write(card->ac97_codec[0], 0x02, 8080);
3553                         ali_ac97_write(card->ac97_codec[0], 0x36, 0);
3554                         ali_ac97_write(card->ac97_codec[0], 0x38, 0);
3555                         /*
3556                          *      On a board with a single codec you won't get the
3557                          *      surround. On other boards configure it.
3558                          */
3559                         if (card->ac97_codec[1] != NULL) {
3560                                 ali_ac97_write(card->ac97_codec[1], 0x36, 0);
3561                                 ali_ac97_write(card->ac97_codec[1], 0x38, 0);
3562                                 ali_ac97_write(card->ac97_codec[1], 0x02, 0x0606);
3563                                 ali_ac97_write(card->ac97_codec[1], 0x18, 0x0303);
3564                                 ali_ac97_write(card->ac97_codec[1], 0x74, 0x3);
3565                         }
3566                         return 1;
3567                 }
3568         }
3569         return -EINVAL;
3570 }
3571
3572 static void
3573 ali_free_pcm_channel(struct trident_card *card, unsigned int channel)
3574 {
3575         int bank;
3576
3577         if (channel > 31)
3578                 return;
3579
3580         bank = channel >> 5;
3581         channel = channel & 0x1f;
3582
3583         card->banks[bank].bitmap &= ~(1 << (channel));
3584 }
3585
3586 static int
3587 ali_allocate_other_states_resources(struct trident_state *state, int chan_nums)
3588 {
3589         struct trident_card *card = state->card;
3590         struct trident_state *s;
3591         int i, state_count = 0;
3592         struct trident_pcm_bank *bank;
3593         struct trident_channel *channel;
3594         unsigned long num;
3595
3596         bank = &card->banks[BANK_A];
3597
3598         if (chan_nums != 6)
3599                 return 0;
3600
3601         for (i = 0; (i < ALI_CHANNELS) && (state_count != 4); i++) {
3602                 if (card->states[i])
3603                         continue;
3604
3605                 num = ali_multi_channels_5_1[state_count];
3606                 if (!(bank->bitmap & (1 << num))) {
3607                         bank->bitmap |= 1 << num;
3608                         channel = &bank->channels[num];
3609                         channel->num = num;
3610                 } else {
3611                         state_count--;
3612                         for (; state_count >= 0; state_count--) {
3613                                 kfree(state->other_states[state_count]);
3614                                 num = ali_multi_channels_5_1[state_count];
3615                                         ali_free_pcm_channel(card, num);
3616                         }
3617                         return -EBUSY;
3618                 }
3619                 s = card->states[i] = kzalloc(sizeof(*state), GFP_KERNEL);
3620                 if (!s) {
3621                         num = ali_multi_channels_5_1[state_count];
3622                         ali_free_pcm_channel(card, num);
3623                         state_count--;
3624                         for (; state_count >= 0; state_count--) {
3625                                 num = ali_multi_channels_5_1[state_count];
3626                                 ali_free_pcm_channel(card, num);
3627                                 kfree(state->other_states[state_count]);
3628                         }
3629                         return -ENOMEM;
3630                 }
3631
3632                 s->dmabuf.channel = channel;
3633                 s->dmabuf.ossfragshift = s->dmabuf.ossmaxfrags =
3634                         s->dmabuf.subdivision = 0;
3635                 init_waitqueue_head(&s->dmabuf.wait);
3636                 s->magic = card->magic;
3637                 s->card = card;
3638                 s->virt = i;
3639                 ali_enable_special_channel(s);
3640                 state->other_states[state_count++] = s;
3641         }
3642
3643         if (state_count != 4) {
3644                 state_count--;
3645                 for (; state_count >= 0; state_count--) {
3646                         kfree(state->other_states[state_count]);
3647                         num = ali_multi_channels_5_1[state_count];
3648                         ali_free_pcm_channel(card, num);
3649                 }
3650                 return -EBUSY;
3651         }
3652         return 0;
3653 }
3654
3655 #ifdef CONFIG_PM
3656 /* save registers for ALi Power Management */
3657 static struct ali_saved_registers {
3658         unsigned long global_regs[ALI_GLOBAL_REGS];
3659         unsigned long channel_regs[ALI_CHANNELS][ALI_CHANNEL_REGS];
3660         unsigned mixer_regs[ALI_MIXER_REGS];
3661 } ali_registers;
3662
3663 static void
3664 ali_save_regs(struct trident_card *card)
3665 {
3666         unsigned long flags;
3667         int i, j;
3668
3669         spin_lock_irqsave(&card->lock, flags);
3670
3671         ali_registers.global_regs[0x2c] = inl(TRID_REG(card, T4D_MISCINT));
3672         //ali_registers.global_regs[0x20] = inl(TRID_REG(card,T4D_START_A));    
3673         ali_registers.global_regs[0x21] = inl(TRID_REG(card, T4D_STOP_A));
3674
3675         //disable all IRQ bits
3676         outl(ALI_DISABLE_ALL_IRQ, TRID_REG(card, T4D_MISCINT));
3677
3678         for (i = 1; i < ALI_MIXER_REGS; i++)
3679                 ali_registers.mixer_regs[i] = ali_ac97_read(card->ac97_codec[0], 
3680                                                             i * 2);
3681
3682         for (i = 0; i < ALI_GLOBAL_REGS; i++) {
3683                 if ((i * 4 == T4D_MISCINT) || (i * 4 == T4D_STOP_A))
3684                         continue;
3685                 ali_registers.global_regs[i] = inl(TRID_REG(card, i * 4));
3686         }
3687
3688         for (i = 0; i < ALI_CHANNELS; i++) {
3689                 outb(i, TRID_REG(card, T4D_LFO_GC_CIR));
3690                 for (j = 0; j < ALI_CHANNEL_REGS; j++)
3691                         ali_registers.channel_regs[i][j] = inl(TRID_REG(card, 
3692                                                                         j * 4 + 0xe0));
3693         }
3694
3695         //Stop all HW channel
3696         outl(ALI_STOP_ALL_CHANNELS, TRID_REG(card, T4D_STOP_A));
3697
3698         spin_unlock_irqrestore(&card->lock, flags);
3699 }
3700
3701 static void
3702 ali_restore_regs(struct trident_card *card)
3703 {
3704         unsigned long flags;
3705         int i, j;
3706
3707         spin_lock_irqsave(&card->lock, flags);
3708
3709         for (i = 1; i < ALI_MIXER_REGS; i++)
3710                 ali_ac97_write(card->ac97_codec[0], i * 2, 
3711                                ali_registers.mixer_regs[i]);
3712
3713         for (i = 0; i < ALI_CHANNELS; i++) {
3714                 outb(i, TRID_REG(card, T4D_LFO_GC_CIR));
3715                 for (j = 0; j < ALI_CHANNEL_REGS; j++)
3716                         outl(ali_registers.channel_regs[i][j], 
3717                              TRID_REG(card, j * 4 + 0xe0));
3718         }
3719
3720         for (i = 0; i < ALI_GLOBAL_REGS; i++) {
3721                 if ((i * 4 == T4D_MISCINT) || (i * 4 == T4D_STOP_A) || 
3722                     (i * 4 == T4D_START_A))
3723                         continue;
3724                 outl(ali_registers.global_regs[i], TRID_REG(card, i * 4));
3725         }
3726
3727         //start HW channel
3728         outl(ali_registers.global_regs[0x20], TRID_REG(card, T4D_START_A));
3729         //restore IRQ enable bits
3730         outl(ali_registers.global_regs[0x2c], TRID_REG(card, T4D_MISCINT));
3731
3732         spin_unlock_irqrestore(&card->lock, flags);
3733 }
3734
3735 static int
3736 trident_suspend(struct pci_dev *dev, pm_message_t unused)
3737 {
3738         struct trident_card *card = pci_get_drvdata(dev);
3739
3740         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
3741                 ali_save_regs(card);
3742         }
3743         return 0;
3744 }
3745
3746 static int
3747 trident_resume(struct pci_dev *dev)
3748 {
3749         struct trident_card *card = pci_get_drvdata(dev);
3750
3751         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
3752                 ali_restore_regs(card);
3753         }
3754         return 0;
3755 }
3756 #endif
3757
3758 static struct trident_channel *
3759 ali_alloc_pcm_channel(struct trident_card *card)
3760 {
3761         struct trident_pcm_bank *bank;
3762         int idx;
3763
3764         bank = &card->banks[BANK_A];
3765
3766         if (inl(TRID_REG(card, ALI_GLOBAL_CONTROL)) & 
3767             (ALI_SPDIF_OUT_CH_ENABLE)) {
3768                 idx = ALI_SPDIF_OUT_CHANNEL;
3769                 if (!(bank->bitmap & (1 << idx))) {
3770                         struct trident_channel *channel = &bank->channels[idx];
3771                         bank->bitmap |= 1 << idx;
3772                         channel->num = idx;
3773                         return channel;
3774                 }
3775         }
3776
3777         for (idx = ALI_PCM_OUT_CHANNEL_FIRST; idx <= ALI_PCM_OUT_CHANNEL_LAST; 
3778              idx++) {
3779                 if (!(bank->bitmap & (1 << idx))) {
3780                         struct trident_channel *channel = &bank->channels[idx];
3781                         bank->bitmap |= 1 << idx;
3782                         channel->num = idx;
3783                         return channel;
3784                 }
3785         }
3786
3787         /* no more free channels avaliable */
3788 #if 0 
3789         printk(KERN_ERR "ali: no more channels available on Bank A.\n");
3790 #endif /* 0 */ 
3791         return NULL;
3792 }
3793
3794 static struct trident_channel *
3795 ali_alloc_rec_pcm_channel(struct trident_card *card)
3796 {
3797         struct trident_pcm_bank *bank;
3798         int idx;
3799
3800         if (inl(TRID_REG(card, ALI_GLOBAL_CONTROL)) & ALI_SPDIF_IN_SUPPORT)
3801                 idx = ALI_SPDIF_IN_CHANNEL;
3802         else
3803                 idx = ALI_PCM_IN_CHANNEL;
3804
3805         bank = &card->banks[BANK_A];
3806
3807         if (!(bank->bitmap & (1 << idx))) {
3808                 struct trident_channel *channel = &bank->channels[idx];
3809                 bank->bitmap |= 1 << idx;
3810                 channel->num = idx;
3811                 return channel;
3812         }
3813
3814         /* no free recordable channels avaliable */
3815 #if 0 
3816         printk(KERN_ERR "ali: no recordable channels available on Bank A.\n");
3817 #endif /* 0 */ 
3818         return NULL;
3819 }
3820
3821 static void
3822 ali_set_spdif_out_rate(struct trident_card *card, unsigned int rate)
3823 {
3824         unsigned char ch_st_sel;
3825         unsigned short status_rate;
3826
3827         switch (rate) {
3828         case 44100:
3829                 status_rate = 0;
3830                 break;
3831         case 32000:
3832                 status_rate = 0x300;
3833                 break;
3834         case 48000:
3835         default:
3836                 status_rate = 0x200;
3837                 break;
3838         }
3839
3840         /* select spdif_out */ 
3841         ch_st_sel = inb(TRID_REG(card, ALI_SPDIF_CTRL)) & ALI_SPDIF_OUT_CH_STATUS;
3842
3843         ch_st_sel |= 0x80;      /* select right */ 
3844         outb(ch_st_sel, TRID_REG(card, ALI_SPDIF_CTRL));
3845         outb(status_rate | 0x20, TRID_REG(card, ALI_SPDIF_CS + 2));
3846
3847         ch_st_sel &= (~0x80);   /* select left */ 
3848         outb(ch_st_sel, TRID_REG(card, ALI_SPDIF_CTRL));
3849         outw(status_rate | 0x10, TRID_REG(card, ALI_SPDIF_CS + 2));
3850 }
3851
3852 static void
3853 ali_address_interrupt(struct trident_card *card)
3854 {
3855         int i, channel;
3856         struct trident_state *state;
3857         u32 mask, channel_mask;
3858
3859         mask = trident_get_interrupt_mask(card, 0);
3860         for (i = 0; i < NR_HW_CH; i++) {
3861                 if ((state = card->states[i]) == NULL)
3862                         continue;
3863                 channel = state->dmabuf.channel->num;
3864                 if ((channel_mask = 1 << channel) & mask) {
3865                         mask &= ~channel_mask;
3866                         trident_ack_channel_interrupt(card, channel);
3867                         udelay(100);
3868                         state->dmabuf.update_flag |= ALI_ADDRESS_INT_UPDATE;
3869                         trident_update_ptr(state);
3870                 }
3871         }
3872         if (mask) {
3873                 for (i = 0; i < NR_HW_CH; i++) {
3874                         if (mask & (1 << i)) {
3875                                 printk("ali: spurious channel irq %d.\n", i);
3876                                 trident_ack_channel_interrupt(card, i);
3877                                 trident_stop_voice(card, i);
3878                                 trident_disable_voice_irq(card, i);
3879                         }
3880                 }
3881         }
3882 }
3883
3884 /* Updating the values of counters of other_states' DMAs without lock 
3885 protection is no harm because all DMAs of multi-channels and interrupt
3886 depend on a master state's DMA, and changing the counters of the master
3887 state DMA is protected by a spinlock.
3888 */
3889 static int
3890 ali_write_5_1(struct trident_state *state, const char __user *buf, 
3891               int cnt_for_multi_channel, unsigned int *copy_count, 
3892               unsigned int *state_cnt)
3893 {
3894
3895         struct dmabuf *dmabuf = &state->dmabuf;
3896         struct dmabuf *dmabuf_temp;
3897         const char __user *buffer = buf;
3898         unsigned swptr, other_dma_nums, sample_s;
3899         unsigned int i, loop;
3900
3901         other_dma_nums = 4;
3902         sample_s = sample_size[dmabuf->fmt] >> 1;
3903         swptr = dmabuf->swptr;
3904
3905         if ((i = state->multi_channels_adjust_count) > 0) {
3906                 if (i == 1) {
3907                         if (copy_from_user(dmabuf->rawbuf + swptr, 
3908                                            buffer, sample_s))
3909                                 return -EFAULT;
3910                         seek_offset(swptr, buffer, cnt_for_multi_channel, 
3911                                     sample_s, *copy_count);
3912                         i--;
3913                         (*state_cnt) += sample_s;
3914                         state->multi_channels_adjust_count++;
3915                 } else
3916                         i = i - (state->chans_num - other_dma_nums);
3917                 for (; (i < other_dma_nums) && (cnt_for_multi_channel > 0); i++) {
3918                         dmabuf_temp = &state->other_states[i]->dmabuf;
3919                         if (copy_from_user(dmabuf_temp->rawbuf + dmabuf_temp->swptr, 
3920                                            buffer, sample_s))
3921                                 return -EFAULT;
3922                         seek_offset(dmabuf_temp->swptr, buffer, cnt_for_multi_channel, 
3923                                     sample_s, *copy_count);
3924                 }
3925                 if (cnt_for_multi_channel == 0)
3926                         state->multi_channels_adjust_count += i;
3927         }
3928         if (cnt_for_multi_channel > 0) {
3929                 loop = cnt_for_multi_channel / (state->chans_num * sample_s);
3930                 for (i = 0; i < loop; i++) {
3931                         if (copy_from_user(dmabuf->rawbuf + swptr, buffer, 
3932                                            sample_s * 2))
3933                                 return -EFAULT;
3934                         seek_offset(swptr, buffer, cnt_for_multi_channel, 
3935                                     sample_s * 2, *copy_count);
3936                         (*state_cnt) += (sample_s * 2);
3937
3938                         dmabuf_temp = &state->other_states[0]->dmabuf;
3939                         if (copy_from_user(dmabuf_temp->rawbuf + dmabuf_temp->swptr, 
3940                                            buffer, sample_s))
3941                                 return -EFAULT;
3942                         seek_offset(dmabuf_temp->swptr, buffer, cnt_for_multi_channel, 
3943                                     sample_s, *copy_count);
3944
3945                         dmabuf_temp = &state->other_states[1]->dmabuf;
3946                         if (copy_from_user(dmabuf_temp->rawbuf + dmabuf_temp->swptr, 
3947                                            buffer, sample_s))
3948                                 return -EFAULT;
3949                         seek_offset(dmabuf_temp->swptr, buffer, cnt_for_multi_channel, 
3950                                     sample_s, *copy_count);
3951
3952                         dmabuf_temp = &state->other_states[2]->dmabuf;
3953                         if (copy_from_user(dmabuf_temp->rawbuf + dmabuf_temp->swptr, 
3954                                            buffer, sample_s))
3955                                 return -EFAULT;
3956                         seek_offset(dmabuf_temp->swptr, buffer, cnt_for_multi_channel, 
3957                                     sample_s, *copy_count);
3958
3959                         dmabuf_temp = &state->other_states[3]->dmabuf;
3960                         if (copy_from_user(dmabuf_temp->rawbuf + dmabuf_temp->swptr, 
3961                                            buffer, sample_s))
3962                                 return -EFAULT;
3963                         seek_offset(dmabuf_temp->swptr, buffer, cnt_for_multi_channel, 
3964                                     sample_s, *copy_count);
3965                 }
3966
3967                 if (cnt_for_multi_channel > 0) {
3968                         state->multi_channels_adjust_count = cnt_for_multi_channel / sample_s;
3969
3970                         if (copy_from_user(dmabuf->rawbuf + swptr, buffer, sample_s))
3971                                 return -EFAULT;
3972                         seek_offset(swptr, buffer, cnt_for_multi_channel, 
3973                                     sample_s, *copy_count);
3974                         (*state_cnt) += sample_s;
3975
3976                         if (cnt_for_multi_channel > 0) {
3977                                 if (copy_from_user(dmabuf->rawbuf + swptr, 
3978                                                    buffer, sample_s))
3979                                         return -EFAULT;
3980                                 seek_offset(swptr, buffer, cnt_for_multi_channel, 
3981                                             sample_s, *copy_count);
3982                                 (*state_cnt) += sample_s;
3983
3984                                 if (cnt_for_multi_channel > 0) {
3985                                         int diff = state->chans_num - other_dma_nums;
3986                                         loop = state->multi_channels_adjust_count - diff;
3987                                         for (i = 0; i < loop; i++) {
3988                                                 dmabuf_temp = &state->other_states[i]->dmabuf;
3989                                                 if (copy_from_user(dmabuf_temp->rawbuf + 
3990                                                                    dmabuf_temp->swptr, 
3991                                                                    buffer, sample_s))
3992                                                         return -EFAULT;
3993                                                 seek_offset(dmabuf_temp->swptr, buffer, 
3994                                                             cnt_for_multi_channel, 
3995                                                             sample_s, *copy_count);
3996                                         }
3997                                 }
3998                         }
3999                 } else
4000                         state->multi_channels_adjust_count = 0;
4001         }
4002         for (i = 0; i < other_dma_nums; i++) {
4003                 dmabuf_temp = &state->other_states[i]->dmabuf;
4004                 dmabuf_temp->swptr = dmabuf_temp->swptr % dmabuf_temp->dmasize;
4005         }
4006         return *state_cnt;
4007 }
4008
4009 static void
4010 ali_free_other_states_resources(struct trident_state *state)
4011 {
4012         int i;
4013         struct trident_card *card = state->card;
4014         struct trident_state *s;
4015         unsigned other_states_count;
4016
4017         other_states_count = state->chans_num - 2; /* except PCM L/R channels */
4018         for (i = 0; i < other_states_count; i++) {
4019                 s = state->other_states[i];
4020                 dealloc_dmabuf(&s->dmabuf, card->pci_dev);
4021                 ali_disable_special_channel(s->card, s->dmabuf.channel->num);
4022                 state->card->free_pcm_channel(s->card, s->dmabuf.channel->num);
4023                 card->states[s->virt] = NULL;
4024                 kfree(s);
4025         }
4026 }
4027
4028 static struct proc_dir_entry *res;
4029
4030 static int
4031 ali_write_proc(struct file *file, const char __user *buffer, unsigned long count, void *data)
4032 {
4033         struct trident_card *card = (struct trident_card *) data;
4034         unsigned long flags;
4035         char c;
4036
4037         if (count < 0)
4038                 return -EINVAL;
4039         if (count == 0)
4040                 return 0;
4041         if (get_user(c, buffer))
4042                 return -EFAULT;
4043
4044         spin_lock_irqsave(&card->lock, flags);
4045         switch (c) {
4046         case '0':
4047                 ali_setup_spdif_out(card, ALI_PCM_TO_SPDIF_OUT);
4048                 ali_disable_special_channel(card, ALI_SPDIF_OUT_CHANNEL);
4049                 break;
4050         case '1':
4051                 ali_setup_spdif_out(card, ALI_SPDIF_OUT_TO_SPDIF_OUT | 
4052                                     ALI_SPDIF_OUT_PCM);
4053                 break;
4054         case '2':
4055                 ali_setup_spdif_out(card, ALI_SPDIF_OUT_TO_SPDIF_OUT | 
4056                                     ALI_SPDIF_OUT_NON_PCM);
4057                 break;
4058         case '3':
4059                 ali_disable_spdif_in(card);     //default
4060                 break;
4061         case '4':
4062                 ali_setup_spdif_in(card);
4063                 break;
4064         }
4065         spin_unlock_irqrestore(&card->lock, flags);
4066
4067         return count;
4068 }
4069
4070 /* OSS /dev/mixer file operation methods */
4071 static int
4072 trident_open_mixdev(struct inode *inode, struct file *file)
4073 {
4074         int i = 0;
4075         int minor = iminor(inode);
4076         struct trident_card *card = devs;
4077
4078         for (card = devs; card != NULL; card = card->next)
4079                 for (i = 0; i < NR_AC97; i++)
4080                         if (card->ac97_codec[i] != NULL && 
4081                             card->ac97_codec[i]->dev_mixer == minor)
4082                                 goto match;
4083
4084         if (!card) {
4085                 return -ENODEV;
4086         }
4087       match:
4088         file->private_data = card->ac97_codec[i];
4089
4090         return nonseekable_open(inode, file);
4091 }
4092
4093 static int
4094 trident_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, 
4095                      unsigned long arg)
4096 {
4097         struct ac97_codec *codec = (struct ac97_codec *) file->private_data;
4098
4099         return codec->mixer_ioctl(codec, cmd, arg);
4100 }
4101
4102 static /*const */ struct file_operations trident_mixer_fops = {
4103         .owner = THIS_MODULE,
4104         .llseek = no_llseek,
4105         .ioctl = trident_ioctl_mixdev,
4106         .open = trident_open_mixdev,
4107 };
4108
4109 static int
4110 ali_reset_5451(struct trident_card *card)
4111 {
4112         struct pci_dev *pci_dev = NULL;
4113         unsigned int dwVal;
4114         unsigned short wCount, wReg;
4115
4116         pci_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
4117                                  pci_dev);
4118         if (pci_dev == NULL)
4119                 return -1;
4120
4121         pci_read_config_dword(pci_dev, 0x7c, &dwVal);
4122         pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
4123         udelay(5000);
4124         pci_read_config_dword(pci_dev, 0x7c, &dwVal);
4125         pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
4126         udelay(5000);
4127         pci_dev_put(pci_dev);
4128
4129         pci_dev = card->pci_dev;
4130         if (pci_dev == NULL)
4131                 return -1;
4132
4133         pci_read_config_dword(pci_dev, 0x44, &dwVal);
4134         pci_write_config_dword(pci_dev, 0x44, dwVal | 0x000c0000);
4135         udelay(500);
4136         pci_read_config_dword(pci_dev, 0x44, &dwVal);
4137         pci_write_config_dword(pci_dev, 0x44, dwVal & 0xfffbffff);
4138         udelay(5000);
4139
4140         /* TODO: recognize if we have a PM capable codec and only do this */
4141         /* if the codec is PM capable */
4142         wCount = 2000;
4143         while (wCount--) {
4144                 wReg = ali_ac97_get(card, 0, AC97_POWER_CONTROL);
4145                 if ((wReg & 0x000f) == 0x000f)
4146                         return 0;
4147                 udelay(5000);
4148         }
4149         /* This is non fatal if you have a non PM capable codec.. */
4150         return 0;
4151 }
4152
4153 /* AC97 codec initialisation. */
4154 static int __devinit
4155 trident_ac97_init(struct trident_card *card)
4156 {
4157         int num_ac97 = 0;
4158         unsigned long ready_2nd = 0;
4159         struct ac97_codec *codec;
4160         int i = 0;
4161
4162         /* initialize controller side of AC link, and find out if secondary codes
4163            really exist */
4164         switch (card->pci_id) {
4165         case PCI_DEVICE_ID_ALI_5451:
4166                 if (ali_reset_5451(card)) {
4167                         printk(KERN_ERR "trident_ac97_init: error "
4168                                "resetting 5451.\n");
4169                         return -1;
4170                 }
4171                 outl(0x80000001, TRID_REG(card, ALI_GLOBAL_CONTROL));
4172                 outl(0x00000000, TRID_REG(card, T4D_AINTEN_A));
4173                 outl(0xffffffff, TRID_REG(card, T4D_AINT_A));
4174                 outl(0x00000000, TRID_REG(card, T4D_MUSICVOL_WAVEVOL));
4175                 outb(0x10, TRID_REG(card, ALI_MPUR2));
4176                 ready_2nd = inl(TRID_REG(card, ALI_SCTRL));
4177                 ready_2nd &= 0x3fff;
4178                 outl(ready_2nd | PCMOUT | 0x8000, TRID_REG(card, ALI_SCTRL));
4179                 ready_2nd = inl(TRID_REG(card, ALI_SCTRL));
4180                 ready_2nd &= SI_AC97_SECONDARY_READY;
4181                 if (card->revision < ALI_5451_V02)
4182                         ready_2nd = 0;
4183                 break;
4184         case PCI_DEVICE_ID_SI_7018:
4185                 /* disable AC97 GPIO interrupt */
4186                 outl(0x00, TRID_REG(card, SI_AC97_GPIO));
4187                 /* when power up the AC link is in cold reset mode so stop it */
4188                 outl(PCMOUT | SURROUT | CENTEROUT | LFEOUT | SECONDARY_ID, 
4189                      TRID_REG(card, SI_SERIAL_INTF_CTRL));
4190                 /* it take a long time to recover from a cold reset */ 
4191                 /* (especially when you have more than one codec) */
4192                 udelay(2000);
4193                 ready_2nd = inl(TRID_REG(card, SI_SERIAL_INTF_CTRL));
4194                 ready_2nd &= SI_AC97_SECONDARY_READY;
4195                 break;
4196         case PCI_DEVICE_ID_TRIDENT_4DWAVE_DX:
4197                 /* playback on */
4198                 outl(DX_AC97_PLAYBACK, TRID_REG(card, DX_ACR2_AC97_COM_STAT));
4199                 break;
4200         case PCI_DEVICE_ID_TRIDENT_4DWAVE_NX:
4201                 /* enable AC97 Output Slot 3,4 (PCM Left/Right Playback) */
4202                 outl(NX_AC97_PCM_OUTPUT, TRID_REG(card, NX_ACR0_AC97_COM_STAT));
4203                 ready_2nd = inl(TRID_REG(card, NX_ACR0_AC97_COM_STAT));
4204                 ready_2nd &= NX_AC97_SECONDARY_READY;
4205                 break;
4206         case PCI_DEVICE_ID_INTERG_5050:
4207                 /* disable AC97 GPIO interrupt */
4208                 outl(0x00, TRID_REG(card, SI_AC97_GPIO));
4209                 /* when power up, the AC link is in cold reset mode, so stop it */
4210                 outl(PCMOUT | SURROUT | CENTEROUT | LFEOUT, 
4211                      TRID_REG(card, SI_SERIAL_INTF_CTRL));
4212                 /* it take a long time to recover from a cold reset (especially */ 
4213                 /* when you have more than one codec) */
4214                 udelay(2000);
4215                 ready_2nd = inl(TRID_REG(card, SI_SERIAL_INTF_CTRL));
4216                 ready_2nd &= SI_AC97_SECONDARY_READY;
4217                 break;
4218         }
4219
4220         for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
4221                 if ((codec = ac97_alloc_codec()) == NULL)
4222                         return -ENOMEM;
4223
4224                 /* initialize some basic codec information, other fields */ 
4225                 /* will be filled in ac97_probe_codec */
4226                 codec->private_data = card;
4227                 codec->id = num_ac97;
4228
4229                 if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
4230                         codec->codec_read = ali_ac97_read;
4231                         codec->codec_write = ali_ac97_write;
4232                 } else {
4233                         codec->codec_read = trident_ac97_get;
4234                         codec->codec_write = trident_ac97_set;
4235                 }
4236
4237                 if (ac97_probe_codec(codec) == 0)
4238                         break;
4239
4240                 codec->dev_mixer = register_sound_mixer(&trident_mixer_fops, -1);
4241                 if (codec->dev_mixer < 0) {
4242                         printk(KERN_ERR "trident: couldn't register mixer!\n");
4243                         ac97_release_codec(codec);
4244                         break;
4245                 }
4246
4247                 card->ac97_codec[num_ac97] = codec;
4248
4249                 /* if there is no secondary codec at all, don't probe any more */
4250                 if (!ready_2nd)
4251                         break;
4252         }
4253
4254         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
4255                 for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
4256                         if (card->ac97_codec[num_ac97] == NULL)
4257                                 break;
4258                         for (i = 0; i < 64; i++) {
4259                                 u16 reg = ali_ac97_get(card, num_ac97, i * 2);
4260                                 card->mixer_regs[i][num_ac97] = reg;
4261                         }
4262                 }
4263         }
4264         return num_ac97 + 1;
4265 }
4266
4267 #ifdef SUPPORT_JOYSTICK
4268 /* Gameport functions for the cards ADC gameport */
4269
4270 static unsigned char trident_game_read(struct gameport *gameport)
4271 {
4272         struct trident_card *card = gameport->port_data;
4273
4274         return inb(TRID_REG(card, T4D_GAME_LEG));
4275 }
4276
4277 static void trident_game_trigger(struct gameport *gameport)
4278 {
4279         struct trident_card *card = gameport->port_data;
4280
4281         outb(0xff, TRID_REG(card, T4D_GAME_LEG));
4282 }
4283
4284 static int trident_game_cooked_read(struct gameport *gameport,
4285                                     int *axes, int *buttons)
4286 {
4287         struct trident_card *card = gameport->port_data;
4288         int i;
4289
4290         *buttons = (~inb(TRID_REG(card, T4D_GAME_LEG)) >> 4) & 0xf;
4291
4292         for (i = 0; i < 4; i++) {
4293                 axes[i] = inw(TRID_REG(card, T4D_GAME_AXD) + i * sizeof (u16));
4294                 if (axes[i] == 0xffff)
4295                         axes[i] = -1;
4296         }
4297
4298         return 0;
4299 }
4300
4301 static int trident_game_open(struct gameport *gameport, int mode)
4302 {
4303         struct trident_card *card = gameport->port_data;
4304
4305         switch (mode) {
4306         case GAMEPORT_MODE_COOKED:
4307                 outb(0x80, TRID_REG(card, T4D_GAME_CR));
4308                 msleep(20);
4309                 return 0;
4310         case GAMEPORT_MODE_RAW:
4311                 outb(0x00, TRID_REG(card, T4D_GAME_CR));
4312                 return 0;
4313         default:
4314                 return -1;
4315         }
4316
4317         return 0;
4318 }
4319
4320 static int __devinit trident_register_gameport(struct trident_card *card)
4321 {
4322         struct gameport *gp;
4323
4324         card->gameport = gp = gameport_allocate_port();
4325         if (!gp) {
4326                 printk(KERN_ERR "trident: can not allocate memory for gameport\n");
4327                 return -ENOMEM;
4328         }
4329
4330         gameport_set_name(gp, "Trident 4DWave");
4331         gameport_set_phys(gp, "pci%s/gameport0", pci_name(card->pci_dev));
4332         gp->read = trident_game_read;
4333         gp->trigger = trident_game_trigger;
4334         gp->cooked_read = trident_game_cooked_read;
4335         gp->open = trident_game_open;
4336         gp->fuzz = 64;
4337         gp->port_data = card;
4338
4339         gameport_register_port(gp);
4340
4341         return 0;
4342 }
4343
4344 static inline void trident_unregister_gameport(struct trident_card *card)
4345 {
4346         if (card->gameport)
4347                 gameport_unregister_port(card->gameport);
4348 }
4349
4350 #else
4351 static inline int trident_register_gameport(struct trident_card *card) { return -ENOSYS; }
4352 static inline void trident_unregister_gameport(struct trident_card *card) { }
4353 #endif /* SUPPORT_JOYSTICK */
4354
4355 /* install the driver, we do not allocate hardware channel nor DMA buffer */ 
4356 /* now, they are defered until "ACCESS" time (in prog_dmabuf called by */ 
4357 /* open/read/write/ioctl/mmap) */
4358 static int __devinit
4359 trident_probe(struct pci_dev *pci_dev, const struct pci_device_id *pci_id)
4360 {
4361         unsigned long iobase;
4362         struct trident_card *card;
4363         u8 bits;
4364         u8 revision;
4365         int i = 0;
4366         u16 temp;
4367         struct pci_dev *pci_dev_m1533 = NULL;
4368         int rc = -ENODEV;
4369         u64 dma_mask;
4370
4371         if (pci_enable_device(pci_dev))
4372                 goto out;
4373
4374         if (pci_dev->device == PCI_DEVICE_ID_ALI_5451)
4375                 dma_mask = ALI_DMA_MASK;
4376         else
4377                 dma_mask = TRIDENT_DMA_MASK;
4378         if (pci_set_dma_mask(pci_dev, dma_mask)) {
4379                 printk(KERN_ERR "trident: architecture does not support" 
4380                        " %s PCI busmaster DMA\n", 
4381                        pci_dev->device == PCI_DEVICE_ID_ALI_5451 ? 
4382                        "32-bit" : "30-bit");
4383                 goto out;
4384         }
4385         pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &revision);
4386
4387         if (pci_id->device == PCI_DEVICE_ID_INTERG_5050)
4388                 iobase = pci_resource_start(pci_dev, 1);
4389         else
4390                 iobase = pci_resource_start(pci_dev, 0);
4391
4392         if (!request_region(iobase, 256, card_names[pci_id->driver_data])) {
4393                 printk(KERN_ERR "trident: can't allocate I/O space at "
4394                        "0x%4.4lx\n", iobase);
4395                 goto out;
4396         }
4397
4398         rc = -ENOMEM;
4399         if ((card = kzalloc(sizeof(*card), GFP_KERNEL)) == NULL) {
4400                 printk(KERN_ERR "trident: out of memory\n");
4401                 goto out_release_region;
4402         }
4403
4404         init_timer(&card->timer);
4405         card->iobase = iobase;
4406         card->pci_dev = pci_dev_get(pci_dev);
4407         card->pci_id = pci_id->device;
4408         card->revision = revision;
4409         card->irq = pci_dev->irq;
4410         card->next = devs;
4411         card->magic = TRIDENT_CARD_MAGIC;
4412         card->banks[BANK_A].addresses = &bank_a_addrs;
4413         card->banks[BANK_A].bitmap = 0UL;
4414         card->banks[BANK_B].addresses = &bank_b_addrs;
4415         card->banks[BANK_B].bitmap = 0UL;
4416
4417         mutex_init(&card->open_mutex);
4418         spin_lock_init(&card->lock);
4419         init_timer(&card->timer);
4420
4421         devs = card;
4422
4423         pci_set_master(pci_dev);
4424
4425         printk(KERN_INFO "trident: %s found at IO 0x%04lx, IRQ %d\n", 
4426                card_names[pci_id->driver_data], card->iobase, card->irq);
4427
4428         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
4429                 /* ALi channel Management */
4430                 card->alloc_pcm_channel = ali_alloc_pcm_channel;
4431                 card->alloc_rec_pcm_channel = ali_alloc_rec_pcm_channel;
4432                 card->free_pcm_channel = ali_free_pcm_channel;
4433
4434                 card->address_interrupt = ali_address_interrupt;
4435
4436                 /* Added by Matt Wu 01-05-2001 for spdif in */
4437                 card->multi_channel_use_count = 0;
4438                 card->rec_channel_use_count = 0;
4439
4440                 /* ALi SPDIF OUT function */
4441                 if (card->revision == ALI_5451_V02) {
4442                         ali_setup_spdif_out(card, ALI_PCM_TO_SPDIF_OUT);
4443                         res = create_proc_entry("ALi5451", 0, NULL);
4444                         if (res) {
4445                                 res->write_proc = ali_write_proc;
4446                                 res->data = card;
4447                         }
4448                 }
4449
4450                 /* Add H/W Volume Control By Matt Wu Jul. 06, 2001 */
4451                 card->hwvolctl = 0;
4452                 pci_dev_m1533 = pci_find_device(PCI_VENDOR_ID_AL, 
4453                                                 PCI_DEVICE_ID_AL_M1533, 
4454                                                 pci_dev_m1533);
4455                 rc = -ENODEV;
4456                 if (pci_dev_m1533 == NULL)
4457                         goto out_proc_fs;
4458                 pci_read_config_byte(pci_dev_m1533, 0x63, &bits);
4459                 if (bits & (1 << 5))
4460                         card->hwvolctl = 1;
4461                 if (card->hwvolctl) {
4462                         /* Clear m1533 pci cfg 78h bit 30 to zero, which makes
4463                            GPIO11/12/13 work as ACGP_UP/DOWN/MUTE. */
4464                         pci_read_config_byte(pci_dev_m1533, 0x7b, &bits);
4465                         bits &= 0xbf;   /*clear bit 6 */
4466                         pci_write_config_byte(pci_dev_m1533, 0x7b, bits);
4467                 }
4468         } else if (card->pci_id == PCI_DEVICE_ID_INTERG_5050) {
4469                 card->alloc_pcm_channel = cyber_alloc_pcm_channel;
4470                 card->alloc_rec_pcm_channel = cyber_alloc_pcm_channel;
4471                 card->free_pcm_channel = cyber_free_pcm_channel;
4472                 card->address_interrupt = cyber_address_interrupt;
4473                 cyber_init_ritual(card);
4474         } else {
4475                 card->alloc_pcm_channel = trident_alloc_pcm_channel;
4476                 card->alloc_rec_pcm_channel = trident_alloc_pcm_channel;
4477                 card->free_pcm_channel = trident_free_pcm_channel;
4478                 card->address_interrupt = trident_address_interrupt;
4479         }
4480
4481         /* claim our irq */
4482         rc = -ENODEV;
4483         if (request_irq(card->irq, &trident_interrupt, IRQF_SHARED,
4484                         card_names[pci_id->driver_data], card)) {
4485                 printk(KERN_ERR "trident: unable to allocate irq %d\n", 
4486                        card->irq);
4487                 goto out_proc_fs;
4488         }
4489         /* register /dev/dsp */
4490         if ((card->dev_audio = register_sound_dsp(&trident_audio_fops, -1)) < 0) {
4491                 printk(KERN_ERR "trident: couldn't register DSP device!\n");
4492                 goto out_free_irq;
4493         }
4494         card->mixer_regs_ready = 0;
4495         /* initialize AC97 codec and register /dev/mixer */
4496         if (trident_ac97_init(card) <= 0) {
4497                 /* unregister audio devices */
4498                 for (i = 0; i < NR_AC97; i++) {
4499                         if (card->ac97_codec[i] != NULL) {
4500                                 struct ac97_codec* codec = card->ac97_codec[i];
4501                                 unregister_sound_mixer(codec->dev_mixer);
4502                                 ac97_release_codec(codec);
4503                         }
4504                 }
4505                 goto out_unregister_sound_dsp;
4506         }
4507         card->mixer_regs_ready = 1;
4508         outl(0x00, TRID_REG(card, T4D_MUSICVOL_WAVEVOL));
4509
4510         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
4511                 /* Add H/W Volume Control By Matt Wu Jul. 06, 2001 */
4512                 if (card->hwvolctl) {
4513                         /* Enable GPIO IRQ (MISCINT bit 18h) */
4514                         temp = inw(TRID_REG(card, T4D_MISCINT + 2));
4515                         temp |= 0x0004;
4516                         outw(temp, TRID_REG(card, T4D_MISCINT + 2));
4517
4518                         /* Enable H/W Volume Control GLOVAL CONTROL bit 0 */
4519                         temp = inw(TRID_REG(card, ALI_GLOBAL_CONTROL));
4520                         temp |= 0x0001;
4521                         outw(temp, TRID_REG(card, ALI_GLOBAL_CONTROL));
4522
4523                 }
4524                 if (card->revision == ALI_5451_V02)
4525                         ali_close_multi_channels();
4526                 /* edited by HMSEO for GT sound */
4527 #if defined(CONFIG_ALPHA_NAUTILUS) || defined(CONFIG_ALPHA_GENERIC)
4528                 {
4529                         u16 ac97_data;
4530                         extern struct hwrpb_struct *hwrpb;
4531
4532                         if ((hwrpb->sys_type) == 201) {
4533                                 printk(KERN_INFO "trident: Running on Alpha system "
4534                                        "type Nautilus\n");
4535                                 ac97_data = ali_ac97_get(card, 0, AC97_POWER_CONTROL);
4536                                 ali_ac97_set(card, 0, AC97_POWER_CONTROL, 
4537                                              ac97_data | ALI_EAPD_POWER_DOWN);
4538                         }
4539                 }
4540 #endif                          /* CONFIG_ALPHA_NAUTILUS || CONFIG_ALPHA_GENERIC */
4541                 /* edited by HMSEO for GT sound */
4542         }
4543         rc = 0;
4544         pci_set_drvdata(pci_dev, card);
4545
4546         /* Enable Address Engine Interrupts */
4547         trident_enable_loop_interrupts(card);
4548
4549         /* Register gameport */
4550         trident_register_gameport(card);
4551
4552 out:
4553         return rc;
4554
4555 out_unregister_sound_dsp:
4556         unregister_sound_dsp(card->dev_audio);
4557 out_free_irq:
4558         free_irq(card->irq, card);
4559 out_proc_fs:
4560         pci_dev_put(card->pci_dev);
4561         if (res) {
4562                 remove_proc_entry("ALi5451", NULL);
4563                 res = NULL;
4564         }
4565         kfree(card);
4566         devs = NULL;
4567 out_release_region:
4568         release_region(iobase, 256);
4569         return rc; 
4570 }
4571
4572 static void __devexit
4573 trident_remove(struct pci_dev *pci_dev)
4574 {
4575         int i;
4576         struct trident_card *card = pci_get_drvdata(pci_dev);
4577
4578         /*
4579          *      Kill running timers before unload. We can't have them
4580          *      going off after rmmod!
4581          */
4582         if (card->hwvolctl)
4583                 del_timer_sync(&card->timer);
4584
4585         /* ALi S/PDIF and Power Management */
4586         if (card->pci_id == PCI_DEVICE_ID_ALI_5451) {
4587                 ali_setup_spdif_out(card, ALI_PCM_TO_SPDIF_OUT);
4588                 ali_disable_special_channel(card, ALI_SPDIF_OUT_CHANNEL);
4589                 ali_disable_spdif_in(card);
4590                 remove_proc_entry("ALi5451", NULL);
4591         }
4592
4593         /* Unregister gameport */
4594         trident_unregister_gameport(card);
4595
4596         /* Kill interrupts, and SP/DIF */
4597         trident_disable_loop_interrupts(card);
4598
4599         /* free hardware resources */
4600         free_irq(card->irq, card);
4601         release_region(card->iobase, 256);
4602
4603         /* unregister audio devices */
4604         for (i = 0; i < NR_AC97; i++)
4605                 if (card->ac97_codec[i] != NULL) {
4606                         unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
4607                         ac97_release_codec(card->ac97_codec[i]);
4608                 }
4609         unregister_sound_dsp(card->dev_audio);
4610
4611         pci_set_drvdata(pci_dev, NULL);
4612         pci_dev_put(card->pci_dev);
4613         kfree(card);
4614 }
4615
4616 MODULE_AUTHOR("Alan Cox, Aaron Holtzman, Ollie Lho, Ching Ling Lee, Muli Ben-Yehuda");
4617 MODULE_DESCRIPTION("Trident 4DWave/SiS 7018/ALi 5451 and Tvia/IGST CyberPro5050 PCI "
4618                    "Audio Driver");
4619 MODULE_LICENSE("GPL");
4620
4621 #define TRIDENT_MODULE_NAME "trident"
4622
4623 static struct pci_driver trident_pci_driver = {
4624         .name = TRIDENT_MODULE_NAME,
4625         .id_table = trident_pci_tbl,
4626         .probe = trident_probe,
4627         .remove = __devexit_p(trident_remove),
4628 #ifdef CONFIG_PM
4629         .suspend = trident_suspend,
4630         .resume = trident_resume
4631 #endif
4632 };
4633
4634 static int __init
4635 trident_init_module(void)
4636 {
4637         printk(KERN_INFO "Trident 4DWave/SiS 7018/ALi 5451,Tvia CyberPro " 
4638                "5050 PCI Audio, version " DRIVER_VERSION ", " __TIME__ " " 
4639                __DATE__ "\n");
4640
4641         return pci_register_driver(&trident_pci_driver);
4642 }
4643
4644 static void __exit
4645 trident_cleanup_module(void)
4646 {
4647         pci_unregister_driver(&trident_pci_driver);
4648 }
4649
4650 module_init(trident_init_module);
4651 module_exit(trident_cleanup_module);