mm: Hold a file reference in madvise_remove
[linux-2.6.git] / sound / oss / swarm_cs4297a.c
1 /*******************************************************************************
2 *
3 *      "swarm_cs4297a.c" --  Cirrus Logic-Crystal CS4297a linux audio driver.
4 *
5 *      Copyright (C) 2001  Broadcom Corporation.
6 *      Copyright (C) 2000,2001  Cirrus Logic Corp.  
7 *            -- adapted from drivers by Thomas Sailer, 
8 *            -- but don't bug him; Problems should go to:
9 *            -- tom woller (twoller@crystal.cirrus.com) or
10 *               (audio@crystal.cirrus.com).
11 *            -- adapted from cs4281 PCI driver for cs4297a on
12 *               BCM1250 Synchronous Serial interface
13 *               (Kip Walker, Broadcom Corp.)
14 *      Copyright (C) 2004  Maciej W. Rozycki
15 *      Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
16 *
17 *      This program is free software; you can redistribute it and/or modify
18 *      it under the terms of the GNU General Public License as published by
19 *      the Free Software Foundation; either version 2 of the License, or
20 *      (at your option) any later version.
21 *
22 *      This program is distributed in the hope that it will be useful,
23 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
24 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25 *      GNU General Public License for more details.
26 *
27 *      You should have received a copy of the GNU General Public License
28 *      along with this program; if not, write to the Free Software
29 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 *
31 * Module command line parameters:
32 *   none
33 *
34 *  Supported devices:
35 *  /dev/dsp    standard /dev/dsp device, (mostly) OSS compatible
36 *  /dev/mixer  standard /dev/mixer device, (mostly) OSS compatible
37 *  /dev/midi   simple MIDI UART interface, no ioctl
38 *
39 * Modification History
40 * 08/20/00 trw - silence and no stopping DAC until release
41 * 08/23/00 trw - added CS_DBG statements, fix interrupt hang issue on DAC stop.
42 * 09/18/00 trw - added 16bit only record with conversion 
43 * 09/24/00 trw - added Enhanced Full duplex (separate simultaneous 
44 *                capture/playback rates)
45 * 10/03/00 trw - fixed mmap (fixed GRECORD and the XMMS mmap test plugin  
46 *                libOSSm.so)
47 * 10/11/00 trw - modified for 2.4.0-test9 kernel enhancements (NR_MAP removal)
48 * 11/03/00 trw - fixed interrupt loss/stutter, added debug.
49 * 11/10/00 bkz - added __devinit to cs4297a_hw_init()
50 * 11/10/00 trw - fixed SMP and capture spinlock hang.
51 * 12/04/00 trw - cleaned up CSDEBUG flags and added "defaultorder" moduleparm.
52 * 12/05/00 trw - fixed polling (myth2), and added underrun swptr fix.
53 * 12/08/00 trw - added PM support. 
54 * 12/14/00 trw - added wrapper code, builds under 2.4.0, 2.2.17-20, 2.2.17-8 
55 *                (RH/Dell base), 2.2.18, 2.2.12.  cleaned up code mods by ident.
56 * 12/19/00 trw - added PM support for 2.2 base (apm_callback). other PM cleanup.
57 * 12/21/00 trw - added fractional "defaultorder" inputs. if >100 then use 
58 *                defaultorder-100 as power of 2 for the buffer size. example:
59 *                106 = 2^(106-100) = 2^6 = 64 bytes for the buffer size.
60 *
61 *******************************************************************************/
62
63 #include <linux/list.h>
64 #include <linux/module.h>
65 #include <linux/string.h>
66 #include <linux/ioport.h>
67 #include <linux/sched.h>
68 #include <linux/delay.h>
69 #include <linux/sound.h>
70 #include <linux/slab.h>
71 #include <linux/soundcard.h>
72 #include <linux/ac97_codec.h>
73 #include <linux/pci.h>
74 #include <linux/bitops.h>
75 #include <linux/interrupt.h>
76 #include <linux/init.h>
77 #include <linux/poll.h>
78 #include <linux/mutex.h>
79 #include <linux/kernel.h>
80
81 #include <asm/byteorder.h>
82 #include <asm/dma.h>
83 #include <asm/io.h>
84 #include <asm/uaccess.h>
85
86 #include <asm/sibyte/sb1250_regs.h>
87 #include <asm/sibyte/sb1250_int.h>
88 #include <asm/sibyte/sb1250_dma.h>
89 #include <asm/sibyte/sb1250_scd.h>
90 #include <asm/sibyte/sb1250_syncser.h>
91 #include <asm/sibyte/sb1250_mac.h>
92 #include <asm/sibyte/sb1250.h>
93
94 struct cs4297a_state;
95
96 static DEFINE_MUTEX(swarm_cs4297a_mutex);
97 static void stop_dac(struct cs4297a_state *s);
98 static void stop_adc(struct cs4297a_state *s);
99 static void start_dac(struct cs4297a_state *s);
100 static void start_adc(struct cs4297a_state *s);
101 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
102
103 // --------------------------------------------------------------------- 
104
105 #define CS4297a_MAGIC           0xf00beef1
106
107 // buffer order determines the size of the dma buffer for the driver.
108 // under Linux, a smaller buffer allows more responsiveness from many of the 
109 // applications (e.g. games).  A larger buffer allows some of the apps (esound) 
110 // to not underrun the dma buffer as easily.  As default, use 32k (order=3)
111 // rather than 64k as some of the games work more responsively.
112 // log base 2( buff sz = 32k).
113
114 //
115 // Turn on/off debugging compilation by commenting out "#define CSDEBUG"
116 //
117 #define CSDEBUG 0
118 #if CSDEBUG
119 #define CSDEBUG_INTERFACE 1
120 #else
121 #undef CSDEBUG_INTERFACE
122 #endif
123 //
124 // cs_debugmask areas
125 //
126 #define CS_INIT         0x00000001      // initialization and probe functions
127 #define CS_ERROR        0x00000002      // tmp debugging bit placeholder
128 #define CS_INTERRUPT    0x00000004      // interrupt handler (separate from all other)
129 #define CS_FUNCTION     0x00000008      // enter/leave functions
130 #define CS_WAVE_WRITE   0x00000010      // write information for wave
131 #define CS_WAVE_READ    0x00000020      // read information for wave
132 #define CS_AC97         0x00000040      // AC97 register access
133 #define CS_DESCR        0x00000080      // descriptor management
134 #define CS_OPEN         0x00000400      // all open functions in the driver
135 #define CS_RELEASE      0x00000800      // all release functions in the driver
136 #define CS_PARMS        0x00001000      // functional and operational parameters
137 #define CS_IOCTL        0x00002000      // ioctl (non-mixer)
138 #define CS_TMP          0x10000000      // tmp debug mask bit
139
140 //
141 // CSDEBUG is usual mode is set to 1, then use the
142 // cs_debuglevel and cs_debugmask to turn on or off debugging.
143 // Debug level of 1 has been defined to be kernel errors and info
144 // that should be printed on any released driver.
145 //
146 #if CSDEBUG
147 #define CS_DBGOUT(mask,level,x) if((cs_debuglevel >= (level)) && ((mask) & cs_debugmask) ) {x;}
148 #else
149 #define CS_DBGOUT(mask,level,x)
150 #endif
151
152 #if CSDEBUG
153 static unsigned long cs_debuglevel = 4; // levels range from 1-9
154 static unsigned long cs_debugmask = CS_INIT /*| CS_IOCTL*/;
155 module_param(cs_debuglevel, int, 0);
156 module_param(cs_debugmask, int, 0);
157 #endif
158 #define CS_TRUE         1
159 #define CS_FALSE        0
160
161 #define CS_TYPE_ADC 0
162 #define CS_TYPE_DAC 1
163
164 #define SER_BASE    (A_SER_BASE_1 + KSEG1)
165 #define SS_CSR(t)   (SER_BASE+t)
166 #define SS_TXTBL(t) (SER_BASE+R_SER_TX_TABLE_BASE+(t*8))
167 #define SS_RXTBL(t) (SER_BASE+R_SER_RX_TABLE_BASE+(t*8))
168
169 #define FRAME_BYTES            32
170 #define FRAME_SAMPLE_BYTES      4
171
172 /* Should this be variable? */
173 #define SAMPLE_BUF_SIZE        (16*1024)
174 #define SAMPLE_FRAME_COUNT     (SAMPLE_BUF_SIZE / FRAME_SAMPLE_BYTES)
175 /* The driver can explode/shrink the frames to/from a smaller sample
176    buffer */
177 #define DMA_BLOAT_FACTOR       1
178 #define DMA_DESCR              (SAMPLE_FRAME_COUNT / DMA_BLOAT_FACTOR)
179 #define DMA_BUF_SIZE           (DMA_DESCR * FRAME_BYTES)
180
181 /* Use the maxmium count (255 == 5.1 ms between interrupts) */
182 #define DMA_INT_CNT            ((1 << S_DMA_INT_PKTCNT) - 1)
183
184 /* Figure this out: how many TX DMAs ahead to schedule a reg access */
185 #define REG_LATENCY            150
186
187 #define FRAME_TX_US             20
188
189 #define SERDMA_NEXTBUF(d,f) (((d)->f+1) % (d)->ringsz)
190
191 static const char invalid_magic[] =
192     KERN_CRIT "cs4297a: invalid magic value\n";
193
194 #define VALIDATE_STATE(s)                          \
195 ({                                                 \
196         if (!(s) || (s)->magic != CS4297a_MAGIC) { \
197                 printk(invalid_magic);             \
198                 return -ENXIO;                     \
199         }                                          \
200 })
201
202 struct list_head cs4297a_devs = { &cs4297a_devs, &cs4297a_devs };
203
204 typedef struct serdma_descr_s {
205         u64 descr_a;
206         u64 descr_b;
207 } serdma_descr_t;
208
209 typedef unsigned long paddr_t;
210
211 typedef struct serdma_s {
212         unsigned         ringsz;
213         serdma_descr_t  *descrtab;
214         serdma_descr_t  *descrtab_end;
215         paddr_t          descrtab_phys;
216         
217         serdma_descr_t  *descr_add;
218         serdma_descr_t  *descr_rem;
219         
220         u64  *dma_buf;           // buffer for DMA contents (frames)
221         paddr_t          dma_buf_phys;
222         u16  *sample_buf;               // tmp buffer for sample conversions
223         u16  *sb_swptr;
224         u16  *sb_hwptr;
225         u16  *sb_end;
226
227         dma_addr_t dmaaddr;
228 //        unsigned buforder;    // Log base 2 of 'dma_buf' size in bytes..
229         unsigned numfrag;       // # of 'fragments' in the buffer.
230         unsigned fragshift;     // Log base 2 of fragment size.
231         unsigned hwptr, swptr;
232         unsigned total_bytes;   // # bytes process since open.
233         unsigned blocks;        // last returned blocks value GETOPTR
234         unsigned wakeup;        // interrupt occurred on block 
235         int count;
236         unsigned underrun;      // underrun flag
237         unsigned error; // over/underrun 
238         wait_queue_head_t wait;
239         wait_queue_head_t reg_wait;
240         // redundant, but makes calculations easier 
241         unsigned fragsize;      // 2**fragshift..
242         unsigned sbufsz;        // 2**buforder.
243         unsigned fragsamples;
244         // OSS stuff 
245         unsigned mapped:1;      // Buffer mapped in cs4297a_mmap()?
246         unsigned ready:1;       // prog_dmabuf_dac()/adc() successful?
247         unsigned endcleared:1;
248         unsigned type:1;        // adc or dac buffer (CS_TYPE_XXX)
249         unsigned ossfragshift;
250         int ossmaxfrags;
251         unsigned subdivision;
252 } serdma_t;
253
254 struct cs4297a_state {
255         // magic 
256         unsigned int magic;
257
258         struct list_head list;
259
260         // soundcore stuff 
261         int dev_audio;
262         int dev_mixer;
263
264         // hardware resources 
265         unsigned int irq;
266
267         struct {
268                 unsigned int rx_ovrrn; /* FIFO */
269                 unsigned int rx_overflow; /* staging buffer */
270                 unsigned int tx_underrun;
271                 unsigned int rx_bad;
272                 unsigned int rx_good;
273         } stats;
274
275         // mixer registers 
276         struct {
277                 unsigned short vol[10];
278                 unsigned int recsrc;
279                 unsigned int modcnt;
280                 unsigned short micpreamp;
281         } mix;
282
283         // wave stuff   
284         struct properties {
285                 unsigned fmt;
286                 unsigned fmt_original;  // original requested format
287                 unsigned channels;
288                 unsigned rate;
289         } prop_dac, prop_adc;
290         unsigned conversion:1;  // conversion from 16 to 8 bit in progress
291         unsigned ena;
292         spinlock_t lock;
293         struct mutex open_mutex;
294         struct mutex open_sem_adc;
295         struct mutex open_sem_dac;
296         fmode_t open_mode;
297         wait_queue_head_t open_wait;
298         wait_queue_head_t open_wait_adc;
299         wait_queue_head_t open_wait_dac;
300
301         dma_addr_t dmaaddr_sample_buf;
302         unsigned buforder_sample_buf;   // Log base 2 of 'dma_buf' size in bytes..
303
304         serdma_t dma_dac, dma_adc;
305
306         volatile u16 read_value;
307         volatile u16 read_reg;
308         volatile u64 reg_request;
309 };
310
311 #if 1
312 #define prog_codec(a,b)
313 #define dealloc_dmabuf(a,b);
314 #endif
315
316 static int prog_dmabuf_adc(struct cs4297a_state *s)
317 {
318         s->dma_adc.ready = 1;
319         return 0;
320 }
321
322
323 static int prog_dmabuf_dac(struct cs4297a_state *s)
324 {
325         s->dma_dac.ready = 1;
326         return 0;
327 }
328
329 static void clear_advance(void *buf, unsigned bsize, unsigned bptr,
330                           unsigned len, unsigned char c)
331 {
332         if (bptr + len > bsize) {
333                 unsigned x = bsize - bptr;
334                 memset(((char *) buf) + bptr, c, x);
335                 bptr = 0;
336                 len -= x;
337         }
338         CS_DBGOUT(CS_WAVE_WRITE, 4, printk(KERN_INFO
339                 "cs4297a: clear_advance(): memset %d at 0x%.8x for %d size \n",
340                         (unsigned)c, (unsigned)((char *) buf) + bptr, len));
341         memset(((char *) buf) + bptr, c, len);
342 }
343
344 #if CSDEBUG
345
346 // DEBUG ROUTINES
347
348 #define SOUND_MIXER_CS_GETDBGLEVEL      _SIOWR('M',120, int)
349 #define SOUND_MIXER_CS_SETDBGLEVEL      _SIOWR('M',121, int)
350 #define SOUND_MIXER_CS_GETDBGMASK       _SIOWR('M',122, int)
351 #define SOUND_MIXER_CS_SETDBGMASK       _SIOWR('M',123, int)
352
353 static void cs_printioctl(unsigned int x)
354 {
355         unsigned int i;
356         unsigned char vidx;
357         // Index of mixtable1[] member is Device ID 
358         // and must be <= SOUND_MIXER_NRDEVICES.
359         // Value of array member is index into s->mix.vol[]
360         static const unsigned char mixtable1[SOUND_MIXER_NRDEVICES] = {
361                 [SOUND_MIXER_PCM] = 1,  // voice 
362                 [SOUND_MIXER_LINE1] = 2,        // AUX
363                 [SOUND_MIXER_CD] = 3,   // CD 
364                 [SOUND_MIXER_LINE] = 4, // Line 
365                 [SOUND_MIXER_SYNTH] = 5,        // FM
366                 [SOUND_MIXER_MIC] = 6,  // Mic 
367                 [SOUND_MIXER_SPEAKER] = 7,      // Speaker 
368                 [SOUND_MIXER_RECLEV] = 8,       // Recording level 
369                 [SOUND_MIXER_VOLUME] = 9        // Master Volume 
370         };
371
372         switch (x) {
373         case SOUND_MIXER_CS_GETDBGMASK:
374                 CS_DBGOUT(CS_IOCTL, 4,
375                           printk("SOUND_MIXER_CS_GETDBGMASK:\n"));
376                 break;
377         case SOUND_MIXER_CS_GETDBGLEVEL:
378                 CS_DBGOUT(CS_IOCTL, 4,
379                           printk("SOUND_MIXER_CS_GETDBGLEVEL:\n"));
380                 break;
381         case SOUND_MIXER_CS_SETDBGMASK:
382                 CS_DBGOUT(CS_IOCTL, 4,
383                           printk("SOUND_MIXER_CS_SETDBGMASK:\n"));
384                 break;
385         case SOUND_MIXER_CS_SETDBGLEVEL:
386                 CS_DBGOUT(CS_IOCTL, 4,
387                           printk("SOUND_MIXER_CS_SETDBGLEVEL:\n"));
388                 break;
389         case OSS_GETVERSION:
390                 CS_DBGOUT(CS_IOCTL, 4, printk("OSS_GETVERSION:\n"));
391                 break;
392         case SNDCTL_DSP_SYNC:
393                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SYNC:\n"));
394                 break;
395         case SNDCTL_DSP_SETDUPLEX:
396                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETDUPLEX:\n"));
397                 break;
398         case SNDCTL_DSP_GETCAPS:
399                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETCAPS:\n"));
400                 break;
401         case SNDCTL_DSP_RESET:
402                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_RESET:\n"));
403                 break;
404         case SNDCTL_DSP_SPEED:
405                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SPEED:\n"));
406                 break;
407         case SNDCTL_DSP_STEREO:
408                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_STEREO:\n"));
409                 break;
410         case SNDCTL_DSP_CHANNELS:
411                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_CHANNELS:\n"));
412                 break;
413         case SNDCTL_DSP_GETFMTS:
414                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETFMTS:\n"));
415                 break;
416         case SNDCTL_DSP_SETFMT:
417                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETFMT:\n"));
418                 break;
419         case SNDCTL_DSP_POST:
420                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_POST:\n"));
421                 break;
422         case SNDCTL_DSP_GETTRIGGER:
423                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETTRIGGER:\n"));
424                 break;
425         case SNDCTL_DSP_SETTRIGGER:
426                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETTRIGGER:\n"));
427                 break;
428         case SNDCTL_DSP_GETOSPACE:
429                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOSPACE:\n"));
430                 break;
431         case SNDCTL_DSP_GETISPACE:
432                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETISPACE:\n"));
433                 break;
434         case SNDCTL_DSP_NONBLOCK:
435                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_NONBLOCK:\n"));
436                 break;
437         case SNDCTL_DSP_GETODELAY:
438                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETODELAY:\n"));
439                 break;
440         case SNDCTL_DSP_GETIPTR:
441                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETIPTR:\n"));
442                 break;
443         case SNDCTL_DSP_GETOPTR:
444                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETOPTR:\n"));
445                 break;
446         case SNDCTL_DSP_GETBLKSIZE:
447                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_GETBLKSIZE:\n"));
448                 break;
449         case SNDCTL_DSP_SETFRAGMENT:
450                 CS_DBGOUT(CS_IOCTL, 4,
451                           printk("SNDCTL_DSP_SETFRAGMENT:\n"));
452                 break;
453         case SNDCTL_DSP_SUBDIVIDE:
454                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SUBDIVIDE:\n"));
455                 break;
456         case SOUND_PCM_READ_RATE:
457                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_RATE:\n"));
458                 break;
459         case SOUND_PCM_READ_CHANNELS:
460                 CS_DBGOUT(CS_IOCTL, 4,
461                           printk("SOUND_PCM_READ_CHANNELS:\n"));
462                 break;
463         case SOUND_PCM_READ_BITS:
464                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_BITS:\n"));
465                 break;
466         case SOUND_PCM_WRITE_FILTER:
467                 CS_DBGOUT(CS_IOCTL, 4,
468                           printk("SOUND_PCM_WRITE_FILTER:\n"));
469                 break;
470         case SNDCTL_DSP_SETSYNCRO:
471                 CS_DBGOUT(CS_IOCTL, 4, printk("SNDCTL_DSP_SETSYNCRO:\n"));
472                 break;
473         case SOUND_PCM_READ_FILTER:
474                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_PCM_READ_FILTER:\n"));
475                 break;
476         case SOUND_MIXER_PRIVATE1:
477                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE1:\n"));
478                 break;
479         case SOUND_MIXER_PRIVATE2:
480                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE2:\n"));
481                 break;
482         case SOUND_MIXER_PRIVATE3:
483                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE3:\n"));
484                 break;
485         case SOUND_MIXER_PRIVATE4:
486                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE4:\n"));
487                 break;
488         case SOUND_MIXER_PRIVATE5:
489                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_PRIVATE5:\n"));
490                 break;
491         case SOUND_MIXER_INFO:
492                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_INFO:\n"));
493                 break;
494         case SOUND_OLD_MIXER_INFO:
495                 CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_OLD_MIXER_INFO:\n"));
496                 break;
497
498         default:
499                 switch (_IOC_NR(x)) {
500                 case SOUND_MIXER_VOLUME:
501                         CS_DBGOUT(CS_IOCTL, 4,
502                                   printk("SOUND_MIXER_VOLUME:\n"));
503                         break;
504                 case SOUND_MIXER_SPEAKER:
505                         CS_DBGOUT(CS_IOCTL, 4,
506                                   printk("SOUND_MIXER_SPEAKER:\n"));
507                         break;
508                 case SOUND_MIXER_RECLEV:
509                         CS_DBGOUT(CS_IOCTL, 4,
510                                   printk("SOUND_MIXER_RECLEV:\n"));
511                         break;
512                 case SOUND_MIXER_MIC:
513                         CS_DBGOUT(CS_IOCTL, 4,
514                                   printk("SOUND_MIXER_MIC:\n"));
515                         break;
516                 case SOUND_MIXER_SYNTH:
517                         CS_DBGOUT(CS_IOCTL, 4,
518                                   printk("SOUND_MIXER_SYNTH:\n"));
519                         break;
520                 case SOUND_MIXER_RECSRC:
521                         CS_DBGOUT(CS_IOCTL, 4,
522                                   printk("SOUND_MIXER_RECSRC:\n"));
523                         break;
524                 case SOUND_MIXER_DEVMASK:
525                         CS_DBGOUT(CS_IOCTL, 4,
526                                   printk("SOUND_MIXER_DEVMASK:\n"));
527                         break;
528                 case SOUND_MIXER_RECMASK:
529                         CS_DBGOUT(CS_IOCTL, 4,
530                                   printk("SOUND_MIXER_RECMASK:\n"));
531                         break;
532                 case SOUND_MIXER_STEREODEVS:
533                         CS_DBGOUT(CS_IOCTL, 4,
534                                   printk("SOUND_MIXER_STEREODEVS:\n"));
535                         break;
536                 case SOUND_MIXER_CAPS:
537                         CS_DBGOUT(CS_IOCTL, 4, printk("SOUND_MIXER_CAPS:\n"));
538                         break;
539                 default:
540                         i = _IOC_NR(x);
541                         if (i >= SOUND_MIXER_NRDEVICES
542                             || !(vidx = mixtable1[i])) {
543                                 CS_DBGOUT(CS_IOCTL, 4, printk
544                                         ("UNKNOWN IOCTL: 0x%.8x NR=%d\n",
545                                                 x, i));
546                         } else {
547                                 CS_DBGOUT(CS_IOCTL, 4, printk
548                                         ("SOUND_MIXER_IOCTL AC9x: 0x%.8x NR=%d\n",
549                                                 x, i));
550                         }
551                         break;
552                 }
553         }
554 }
555 #endif
556
557
558 static int ser_init(struct cs4297a_state *s)
559 {
560         int i;
561
562         CS_DBGOUT(CS_INIT, 2, 
563                   printk(KERN_INFO "cs4297a: Setting up serial parameters\n"));
564
565         __raw_writeq(M_SYNCSER_CMD_RX_RESET | M_SYNCSER_CMD_TX_RESET, SS_CSR(R_SER_CMD));
566
567         __raw_writeq(M_SYNCSER_MSB_FIRST, SS_CSR(R_SER_MODE));
568         __raw_writeq(32, SS_CSR(R_SER_MINFRM_SZ));
569         __raw_writeq(32, SS_CSR(R_SER_MAXFRM_SZ));
570
571         __raw_writeq(1, SS_CSR(R_SER_TX_RD_THRSH));
572         __raw_writeq(4, SS_CSR(R_SER_TX_WR_THRSH));
573         __raw_writeq(8, SS_CSR(R_SER_RX_RD_THRSH));
574
575         /* This looks good from experimentation */
576         __raw_writeq((M_SYNCSER_TXSYNC_INT | V_SYNCSER_TXSYNC_DLY(0) | M_SYNCSER_TXCLK_EXT |
577                M_SYNCSER_RXSYNC_INT | V_SYNCSER_RXSYNC_DLY(1) | M_SYNCSER_RXCLK_EXT | M_SYNCSER_RXSYNC_EDGE),
578               SS_CSR(R_SER_LINE_MODE));
579
580         /* This looks good from experimentation */
581         __raw_writeq(V_SYNCSER_SEQ_COUNT(14) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE,
582               SS_TXTBL(0));
583         __raw_writeq(V_SYNCSER_SEQ_COUNT(15) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
584               SS_TXTBL(1));
585         __raw_writeq(V_SYNCSER_SEQ_COUNT(13) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
586               SS_TXTBL(2));
587         __raw_writeq(V_SYNCSER_SEQ_COUNT( 0) | M_SYNCSER_SEQ_ENABLE |
588               M_SYNCSER_SEQ_STROBE | M_SYNCSER_SEQ_LAST, SS_TXTBL(3));
589
590         __raw_writeq(V_SYNCSER_SEQ_COUNT(14) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE,
591               SS_RXTBL(0));
592         __raw_writeq(V_SYNCSER_SEQ_COUNT(15) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
593               SS_RXTBL(1));
594         __raw_writeq(V_SYNCSER_SEQ_COUNT(13) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_BYTE,
595               SS_RXTBL(2));
596         __raw_writeq(V_SYNCSER_SEQ_COUNT( 0) | M_SYNCSER_SEQ_ENABLE | M_SYNCSER_SEQ_STROBE |
597               M_SYNCSER_SEQ_LAST, SS_RXTBL(3));
598
599         for (i=4; i<16; i++) {
600                 /* Just in case... */
601                 __raw_writeq(M_SYNCSER_SEQ_LAST, SS_TXTBL(i));
602                 __raw_writeq(M_SYNCSER_SEQ_LAST, SS_RXTBL(i));
603         }
604
605         return 0;
606 }
607
608 static int init_serdma(serdma_t *dma)
609 {
610         CS_DBGOUT(CS_INIT, 2,
611                   printk(KERN_ERR "cs4297a: desc - %d sbufsize - %d dbufsize - %d\n",
612                          DMA_DESCR, SAMPLE_BUF_SIZE, DMA_BUF_SIZE));
613
614         /* Descriptors */
615         dma->ringsz = DMA_DESCR;
616         dma->descrtab = kzalloc(dma->ringsz * sizeof(serdma_descr_t), GFP_KERNEL);
617         if (!dma->descrtab) {
618                 printk(KERN_ERR "cs4297a: kzalloc descrtab failed\n");
619                 return -1;
620         }
621         dma->descrtab_end = dma->descrtab + dma->ringsz;
622         /* XXX bloddy mess, use proper DMA API here ...  */
623         dma->descrtab_phys = CPHYSADDR((long)dma->descrtab);
624         dma->descr_add = dma->descr_rem = dma->descrtab;
625
626         /* Frame buffer area */
627         dma->dma_buf = kzalloc(DMA_BUF_SIZE, GFP_KERNEL);
628         if (!dma->dma_buf) {
629                 printk(KERN_ERR "cs4297a: kzalloc dma_buf failed\n");
630                 kfree(dma->descrtab);
631                 return -1;
632         }
633         dma->dma_buf_phys = CPHYSADDR((long)dma->dma_buf);
634
635         /* Samples buffer area */
636         dma->sbufsz = SAMPLE_BUF_SIZE;
637         dma->sample_buf = kmalloc(dma->sbufsz, GFP_KERNEL);
638         if (!dma->sample_buf) {
639                 printk(KERN_ERR "cs4297a: kmalloc sample_buf failed\n");
640                 kfree(dma->descrtab);
641                 kfree(dma->dma_buf);
642                 return -1;
643         }
644         dma->sb_swptr = dma->sb_hwptr = dma->sample_buf;
645         dma->sb_end = (u16 *)((void *)dma->sample_buf + dma->sbufsz);
646         dma->fragsize = dma->sbufsz >> 1;
647
648         CS_DBGOUT(CS_INIT, 4, 
649                   printk(KERN_ERR "cs4297a: descrtab - %08x dma_buf - %x sample_buf - %x\n",
650                          (int)dma->descrtab, (int)dma->dma_buf, 
651                          (int)dma->sample_buf));
652
653         return 0;
654 }
655
656 static int dma_init(struct cs4297a_state *s)
657 {
658         int i;
659
660         CS_DBGOUT(CS_INIT, 2, 
661                   printk(KERN_INFO "cs4297a: Setting up DMA\n"));
662
663         if (init_serdma(&s->dma_adc) ||
664             init_serdma(&s->dma_dac))
665                 return -1;
666
667         if (__raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_RX))||
668             __raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_TX))) {
669                 panic("DMA state corrupted?!");
670         }
671
672         /* Initialize now - the descr/buffer pairings will never
673            change... */
674         for (i=0; i<DMA_DESCR; i++) {
675                 s->dma_dac.descrtab[i].descr_a = M_DMA_SERRX_SOP | V_DMA_DSCRA_A_SIZE(1) | 
676                         (s->dma_dac.dma_buf_phys + i*FRAME_BYTES);
677                 s->dma_dac.descrtab[i].descr_b = V_DMA_DSCRB_PKT_SIZE(FRAME_BYTES);
678                 s->dma_adc.descrtab[i].descr_a = V_DMA_DSCRA_A_SIZE(1) |
679                         (s->dma_adc.dma_buf_phys + i*FRAME_BYTES);
680                 s->dma_adc.descrtab[i].descr_b = 0;
681         }
682
683         __raw_writeq((M_DMA_EOP_INT_EN | V_DMA_INT_PKTCNT(DMA_INT_CNT) |
684                V_DMA_RINGSZ(DMA_DESCR) | M_DMA_TDX_EN),
685               SS_CSR(R_SER_DMA_CONFIG0_RX));
686         __raw_writeq(M_DMA_L2CA, SS_CSR(R_SER_DMA_CONFIG1_RX));
687         __raw_writeq(s->dma_adc.descrtab_phys, SS_CSR(R_SER_DMA_DSCR_BASE_RX));
688
689         __raw_writeq(V_DMA_RINGSZ(DMA_DESCR), SS_CSR(R_SER_DMA_CONFIG0_TX));
690         __raw_writeq(M_DMA_L2CA | M_DMA_NO_DSCR_UPDT, SS_CSR(R_SER_DMA_CONFIG1_TX));
691         __raw_writeq(s->dma_dac.descrtab_phys, SS_CSR(R_SER_DMA_DSCR_BASE_TX));
692
693         /* Prep the receive DMA descriptor ring */
694         __raw_writeq(DMA_DESCR, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
695
696         __raw_writeq(M_SYNCSER_DMA_RX_EN | M_SYNCSER_DMA_TX_EN, SS_CSR(R_SER_DMA_ENABLE));
697
698         __raw_writeq((M_SYNCSER_RX_SYNC_ERR | M_SYNCSER_RX_OVERRUN | M_SYNCSER_RX_EOP_COUNT),
699               SS_CSR(R_SER_INT_MASK));
700
701         /* Enable the rx/tx; let the codec warm up to the sync and
702            start sending good frames before the receive FIFO is
703            enabled */
704         __raw_writeq(M_SYNCSER_CMD_TX_EN, SS_CSR(R_SER_CMD));
705         udelay(1000);
706         __raw_writeq(M_SYNCSER_CMD_RX_EN | M_SYNCSER_CMD_TX_EN, SS_CSR(R_SER_CMD));
707
708         /* XXXKW is this magic? (the "1" part) */
709         while ((__raw_readq(SS_CSR(R_SER_STATUS)) & 0xf1) != 1)
710                 ;
711
712         CS_DBGOUT(CS_INIT, 4, 
713                   printk(KERN_INFO "cs4297a: status: %08x\n",
714                          (unsigned int)(__raw_readq(SS_CSR(R_SER_STATUS)) & 0xffffffff)));
715
716         return 0;
717 }
718
719 static int serdma_reg_access(struct cs4297a_state *s, u64 data)
720 {
721         serdma_t *d = &s->dma_dac;
722         u64 *data_p;
723         unsigned swptr;
724         unsigned long flags;
725         serdma_descr_t *descr;
726
727         if (s->reg_request) {
728                 printk(KERN_ERR "cs4297a: attempt to issue multiple reg_access\n");
729                 return -1;
730         }
731
732         if (s->ena & FMODE_WRITE) {
733                 /* Since a writer has the DSP open, we have to mux the
734                    request in */
735                 s->reg_request = data;
736                 interruptible_sleep_on(&s->dma_dac.reg_wait);
737                 /* XXXKW how can I deal with the starvation case where
738                    the opener isn't writing? */
739         } else {
740                 /* Be safe when changing ring pointers */
741                 spin_lock_irqsave(&s->lock, flags);
742                 if (d->hwptr != d->swptr) {
743                         printk(KERN_ERR "cs4297a: reg access found bookkeeping error (hw/sw = %d/%d\n",
744                                d->hwptr, d->swptr);
745                         spin_unlock_irqrestore(&s->lock, flags);
746                         return -1;
747                 }
748                 swptr = d->swptr;
749                 d->hwptr = d->swptr = (d->swptr + 1) % d->ringsz;
750                 spin_unlock_irqrestore(&s->lock, flags);
751
752                 descr = &d->descrtab[swptr];
753                 data_p = &d->dma_buf[swptr * 4];
754                 *data_p = cpu_to_be64(data);
755                 __raw_writeq(1, SS_CSR(R_SER_DMA_DSCR_COUNT_TX));
756                 CS_DBGOUT(CS_DESCR, 4,
757                           printk(KERN_INFO "cs4297a: add_tx  %p (%x -> %x)\n",
758                                  data_p, swptr, d->hwptr));
759         }
760
761         CS_DBGOUT(CS_FUNCTION, 6,
762                   printk(KERN_INFO "cs4297a: serdma_reg_access()-\n"));
763         
764         return 0;
765 }
766
767 //****************************************************************************
768 // "cs4297a_read_ac97" -- Reads an AC97 register
769 //****************************************************************************
770 static int cs4297a_read_ac97(struct cs4297a_state *s, u32 offset,
771                             u32 * value)
772 {
773         CS_DBGOUT(CS_AC97, 1,
774                   printk(KERN_INFO "cs4297a: read reg %2x\n", offset));
775         if (serdma_reg_access(s, (0xCLL << 60) | (1LL << 47) | ((u64)(offset & 0x7F) << 40)))
776                 return -1;
777
778         interruptible_sleep_on(&s->dma_adc.reg_wait);
779         *value = s->read_value;
780         CS_DBGOUT(CS_AC97, 2,
781                   printk(KERN_INFO "cs4297a: rdr reg %x -> %x\n", s->read_reg, s->read_value));
782
783         return 0;
784 }
785
786
787 //****************************************************************************
788 // "cs4297a_write_ac97()"-- writes an AC97 register
789 //****************************************************************************
790 static int cs4297a_write_ac97(struct cs4297a_state *s, u32 offset,
791                              u32 value)
792 {
793         CS_DBGOUT(CS_AC97, 1,
794                   printk(KERN_INFO "cs4297a: write reg %2x -> %04x\n", offset, value));
795         return (serdma_reg_access(s, (0xELL << 60) | ((u64)(offset & 0x7F) << 40) | ((value & 0xffff) << 12)));
796 }
797
798 static void stop_dac(struct cs4297a_state *s)
799 {
800         unsigned long flags;
801
802         CS_DBGOUT(CS_WAVE_WRITE, 3, printk(KERN_INFO "cs4297a: stop_dac():\n"));
803         spin_lock_irqsave(&s->lock, flags);
804         s->ena &= ~FMODE_WRITE;
805 #if 0
806         /* XXXKW what do I really want here?  My theory for now is
807            that I just flip the "ena" bit, and the interrupt handler
808            will stop processing the xmit channel */
809         __raw_writeq((s->ena & FMODE_READ) ? M_SYNCSER_DMA_RX_EN : 0,
810               SS_CSR(R_SER_DMA_ENABLE));
811 #endif
812
813         spin_unlock_irqrestore(&s->lock, flags);
814 }
815
816
817 static void start_dac(struct cs4297a_state *s)
818 {
819         unsigned long flags;
820
821         CS_DBGOUT(CS_FUNCTION, 3, printk(KERN_INFO "cs4297a: start_dac()+\n"));
822         spin_lock_irqsave(&s->lock, flags);
823         if (!(s->ena & FMODE_WRITE) && (s->dma_dac.mapped ||
824                                         (s->dma_dac.count > 0
825                                         && s->dma_dac.ready))) {
826                 s->ena |= FMODE_WRITE;
827                 /* XXXKW what do I really want here?  My theory for
828                    now is that I just flip the "ena" bit, and the
829                    interrupt handler will start processing the xmit
830                    channel */
831
832                 CS_DBGOUT(CS_WAVE_WRITE | CS_PARMS, 8, printk(KERN_INFO
833                         "cs4297a: start_dac(): start dma\n"));
834
835         }
836         spin_unlock_irqrestore(&s->lock, flags);
837         CS_DBGOUT(CS_FUNCTION, 3,
838                   printk(KERN_INFO "cs4297a: start_dac()-\n"));
839 }
840
841
842 static void stop_adc(struct cs4297a_state *s)
843 {
844         unsigned long flags;
845
846         CS_DBGOUT(CS_FUNCTION, 3,
847                   printk(KERN_INFO "cs4297a: stop_adc()+\n"));
848
849         spin_lock_irqsave(&s->lock, flags);
850         s->ena &= ~FMODE_READ;
851
852         if (s->conversion == 1) {
853                 s->conversion = 0;
854                 s->prop_adc.fmt = s->prop_adc.fmt_original;
855         }
856         /* Nothing to do really, I need to keep the DMA going
857            XXXKW when do I get here, and is there more I should do? */
858         spin_unlock_irqrestore(&s->lock, flags);
859         CS_DBGOUT(CS_FUNCTION, 3,
860                   printk(KERN_INFO "cs4297a: stop_adc()-\n"));
861 }
862
863
864 static void start_adc(struct cs4297a_state *s)
865 {
866         unsigned long flags;
867
868         CS_DBGOUT(CS_FUNCTION, 2,
869                   printk(KERN_INFO "cs4297a: start_adc()+\n"));
870
871         if (!(s->ena & FMODE_READ) &&
872             (s->dma_adc.mapped || s->dma_adc.count <=
873              (signed) (s->dma_adc.sbufsz - 2 * s->dma_adc.fragsize))
874             && s->dma_adc.ready) {
875                 if (s->prop_adc.fmt & AFMT_S8 || s->prop_adc.fmt & AFMT_U8) {
876                         // 
877                         // now only use 16 bit capture, due to truncation issue
878                         // in the chip, noticeable distortion occurs.
879                         // allocate buffer and then convert from 16 bit to 
880                         // 8 bit for the user buffer.
881                         //
882                         s->prop_adc.fmt_original = s->prop_adc.fmt;
883                         if (s->prop_adc.fmt & AFMT_S8) {
884                                 s->prop_adc.fmt &= ~AFMT_S8;
885                                 s->prop_adc.fmt |= AFMT_S16_LE;
886                         }
887                         if (s->prop_adc.fmt & AFMT_U8) {
888                                 s->prop_adc.fmt &= ~AFMT_U8;
889                                 s->prop_adc.fmt |= AFMT_U16_LE;
890                         }
891                         //
892                         // prog_dmabuf_adc performs a stop_adc() but that is
893                         // ok since we really haven't started the DMA yet.
894                         //
895                         prog_codec(s, CS_TYPE_ADC);
896
897                         prog_dmabuf_adc(s);
898                         s->conversion = 1;
899                 }
900                 spin_lock_irqsave(&s->lock, flags);
901                 s->ena |= FMODE_READ;
902                 /* Nothing to do really, I am probably already
903                    DMAing...  XXXKW when do I get here, and is there
904                    more I should do? */
905                 spin_unlock_irqrestore(&s->lock, flags);
906
907                 CS_DBGOUT(CS_PARMS, 6, printk(KERN_INFO
908                          "cs4297a: start_adc(): start adc\n"));
909         }
910         CS_DBGOUT(CS_FUNCTION, 2,
911                   printk(KERN_INFO "cs4297a: start_adc()-\n"));
912
913 }
914
915
916 // call with spinlock held! 
917 static void cs4297a_update_ptr(struct cs4297a_state *s, int intflag)
918 {
919         int good_diff, diff, diff2;
920         u64 *data_p, data;
921         u32 *s_ptr;
922         unsigned hwptr;
923         u32 status;
924         serdma_t *d;
925         serdma_descr_t *descr;
926
927         // update ADC pointer 
928         status = intflag ? __raw_readq(SS_CSR(R_SER_STATUS)) : 0;
929
930         if ((s->ena & FMODE_READ) || (status & (M_SYNCSER_RX_EOP_COUNT))) {
931                 d = &s->dma_adc;
932                 hwptr = (unsigned) (((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
933                                      d->descrtab_phys) / sizeof(serdma_descr_t));
934
935                 if (s->ena & FMODE_READ) {
936                         CS_DBGOUT(CS_FUNCTION, 2, 
937                                   printk(KERN_INFO "cs4297a: upd_rcv sw->hw->hw %x/%x/%x (int-%d)n",
938                                          d->swptr, d->hwptr, hwptr, intflag));
939                         /* Number of DMA buffers available for software: */
940                         diff2 = diff = (d->ringsz + hwptr - d->hwptr) % d->ringsz;
941                         d->hwptr = hwptr;
942                         good_diff = 0;
943                         s_ptr = (u32 *)&(d->dma_buf[d->swptr*4]);
944                         descr = &d->descrtab[d->swptr];
945                         while (diff2--) {
946                                 u64 data = be64_to_cpu(*(u64 *)s_ptr);
947                                 u64 descr_a;
948                                 u16 left, right;
949                                 descr_a = descr->descr_a;
950                                 descr->descr_a &= ~M_DMA_SERRX_SOP;
951                                 if ((descr_a & M_DMA_DSCRA_A_ADDR) != CPHYSADDR((long)s_ptr)) {
952                                         printk(KERN_ERR "cs4297a: RX Bad address (read)\n");
953                                 }
954                                 if (((data & 0x9800000000000000) != 0x9800000000000000) ||
955                                     (!(descr_a & M_DMA_SERRX_SOP)) ||
956                                     (G_DMA_DSCRB_PKT_SIZE(descr->descr_b) != FRAME_BYTES)) {
957                                         s->stats.rx_bad++;
958                                         printk(KERN_DEBUG "cs4297a: RX Bad attributes (read)\n");
959                                         continue;
960                                 }
961                                 s->stats.rx_good++;
962                                 if ((data >> 61) == 7) {
963                                         s->read_value = (data >> 12) & 0xffff;
964                                         s->read_reg = (data >> 40) & 0x7f;
965                                         wake_up(&d->reg_wait);
966                                 }
967                                 if (d->count && (d->sb_hwptr == d->sb_swptr)) {
968                                         s->stats.rx_overflow++;
969                                         printk(KERN_DEBUG "cs4297a: RX overflow\n");
970                                         continue;
971                                 }
972                                 good_diff++;
973                                 left = ((be32_to_cpu(s_ptr[1]) & 0xff) << 8) |
974                                        ((be32_to_cpu(s_ptr[2]) >> 24) & 0xff);
975                                 right = (be32_to_cpu(s_ptr[2]) >> 4) & 0xffff;
976                                 *d->sb_hwptr++ = cpu_to_be16(left);
977                                 *d->sb_hwptr++ = cpu_to_be16(right);
978                                 if (d->sb_hwptr == d->sb_end)
979                                         d->sb_hwptr = d->sample_buf;
980                                 descr++;
981                                 if (descr == d->descrtab_end) {
982                                         descr = d->descrtab;
983                                         s_ptr = (u32 *)s->dma_adc.dma_buf;
984                                 } else {
985                                         s_ptr += 8;
986                                 }
987                         }
988                         d->total_bytes += good_diff * FRAME_SAMPLE_BYTES;
989                         d->count += good_diff * FRAME_SAMPLE_BYTES;
990                         if (d->count > d->sbufsz) {
991                                 printk(KERN_ERR "cs4297a: bogus receive overflow!!\n");
992                         }
993                         d->swptr = (d->swptr + diff) % d->ringsz;
994                         __raw_writeq(diff, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
995                         if (d->mapped) {
996                                 if (d->count >= (signed) d->fragsize)
997                                         wake_up(&d->wait);
998                         } else {
999                                 if (d->count > 0) {
1000                                         CS_DBGOUT(CS_WAVE_READ, 4,
1001                                                   printk(KERN_INFO
1002                                                          "cs4297a: update count -> %d\n", d->count));
1003                                         wake_up(&d->wait);
1004                                 }
1005                         }
1006                 } else {
1007                         /* Receive is going even if no one is
1008                            listening (for register accesses and to
1009                            avoid FIFO overrun) */
1010                         diff2 = diff = (hwptr + d->ringsz - d->hwptr) % d->ringsz;
1011                         if (!diff) {
1012                                 printk(KERN_ERR "cs4297a: RX full or empty?\n");
1013                         }
1014                         
1015                         descr = &d->descrtab[d->swptr];
1016                         data_p = &d->dma_buf[d->swptr*4];
1017
1018                         /* Force this to happen at least once; I got
1019                            here because of an interrupt, so there must
1020                            be a buffer to process. */
1021                         do {
1022                                 data = be64_to_cpu(*data_p);
1023                                 if ((descr->descr_a & M_DMA_DSCRA_A_ADDR) != CPHYSADDR((long)data_p)) {
1024                                         printk(KERN_ERR "cs4297a: RX Bad address %d (%llx %lx)\n", d->swptr,
1025                                                (long long)(descr->descr_a & M_DMA_DSCRA_A_ADDR),
1026                                                (long)CPHYSADDR((long)data_p));
1027                                 }
1028                                 if (!(data & (1LL << 63)) ||
1029                                     !(descr->descr_a & M_DMA_SERRX_SOP) ||
1030                                     (G_DMA_DSCRB_PKT_SIZE(descr->descr_b) != FRAME_BYTES)) {
1031                                         s->stats.rx_bad++;
1032                                         printk(KERN_DEBUG "cs4297a: RX Bad attributes\n");
1033                                 } else {
1034                                         s->stats.rx_good++;
1035                                         if ((data >> 61) == 7) {
1036                                                 s->read_value = (data >> 12) & 0xffff;
1037                                                 s->read_reg = (data >> 40) & 0x7f;
1038                                                 wake_up(&d->reg_wait);
1039                                         }
1040                                 }
1041                                 descr->descr_a &= ~M_DMA_SERRX_SOP;
1042                                 descr++;
1043                                 d->swptr++;
1044                                 data_p += 4;
1045                                 if (descr == d->descrtab_end) {
1046                                         descr = d->descrtab;
1047                                         d->swptr = 0;
1048                                         data_p = d->dma_buf;
1049                                 }
1050                                 __raw_writeq(1, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
1051                         } while (--diff);
1052                         d->hwptr = hwptr;
1053
1054                         CS_DBGOUT(CS_DESCR, 6, 
1055                                   printk(KERN_INFO "cs4297a: hw/sw %x/%x\n", d->hwptr, d->swptr));
1056                 }
1057
1058                 CS_DBGOUT(CS_PARMS, 8, printk(KERN_INFO
1059                         "cs4297a: cs4297a_update_ptr(): s=0x%.8x hwptr=%d total_bytes=%d count=%d \n",
1060                                 (unsigned)s, d->hwptr, 
1061                                 d->total_bytes, d->count));
1062         }
1063
1064         /* XXXKW worry about s->reg_request -- there is a starvation
1065            case if s->ena has FMODE_WRITE on, but the client isn't
1066            doing writes */
1067
1068         // update DAC pointer 
1069         //
1070         // check for end of buffer, means that we are going to wait for another interrupt
1071         // to allow silence to fill the fifos on the part, to keep pops down to a minimum.
1072         //
1073         if (s->ena & FMODE_WRITE) {
1074                 serdma_t *d = &s->dma_dac;
1075                 hwptr = (unsigned) (((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
1076                                      d->descrtab_phys) / sizeof(serdma_descr_t));
1077                 diff = (d->ringsz + hwptr - d->hwptr) % d->ringsz;
1078                 CS_DBGOUT(CS_WAVE_WRITE, 4, printk(KERN_INFO
1079                                                    "cs4297a: cs4297a_update_ptr(): hw/hw/sw %x/%x/%x diff %d count %d\n",
1080                                                    d->hwptr, hwptr, d->swptr, diff, d->count));
1081                 d->hwptr = hwptr;
1082                 /* XXXKW stereo? conversion? Just assume 2 16-bit samples for now */
1083                 d->total_bytes += diff * FRAME_SAMPLE_BYTES;
1084                 if (d->mapped) {
1085                         d->count += diff * FRAME_SAMPLE_BYTES;
1086                         if (d->count >= d->fragsize) {
1087                                 d->wakeup = 1;
1088                                 wake_up(&d->wait);
1089                                 if (d->count > d->sbufsz)
1090                                         d->count &= d->sbufsz - 1;
1091                         }
1092                 } else {
1093                         d->count -= diff * FRAME_SAMPLE_BYTES;
1094                         if (d->count <= 0) {
1095                                 //
1096                                 // fill with silence, and do not shut down the DAC.
1097                                 // Continue to play silence until the _release.
1098                                 //
1099                                 CS_DBGOUT(CS_WAVE_WRITE, 6, printk(KERN_INFO
1100                                         "cs4297a: cs4297a_update_ptr(): memset %d at 0x%.8x for %d size \n",
1101                                                 (unsigned)(s->prop_dac.fmt & 
1102                                                 (AFMT_U8 | AFMT_U16_LE)) ? 0x80 : 0, 
1103                                                 (unsigned)d->dma_buf, 
1104                                                 d->ringsz));
1105                                 memset(d->dma_buf, 0, d->ringsz * FRAME_BYTES);
1106                                 if (d->count < 0) {
1107                                         d->underrun = 1;
1108                                         s->stats.tx_underrun++;
1109                                         d->count = 0;
1110                                         CS_DBGOUT(CS_ERROR, 9, printk(KERN_INFO
1111                                          "cs4297a: cs4297a_update_ptr(): underrun\n"));
1112                                 }
1113                         } else if (d->count <=
1114                                    (signed) d->fragsize
1115                                    && !d->endcleared) {
1116                           /* XXXKW what is this for? */
1117                                 clear_advance(d->dma_buf,
1118                                               d->sbufsz,
1119                                               d->swptr,
1120                                               d->fragsize,
1121                                               0);
1122                                 d->endcleared = 1;
1123                         }
1124                         if ( (d->count <= (signed) d->sbufsz/2) || intflag)
1125                         {
1126                                 CS_DBGOUT(CS_WAVE_WRITE, 4,
1127                                           printk(KERN_INFO
1128                                                  "cs4297a: update count -> %d\n", d->count));
1129                                 wake_up(&d->wait);
1130                         }
1131                 }
1132                 CS_DBGOUT(CS_PARMS, 8, printk(KERN_INFO
1133                         "cs4297a: cs4297a_update_ptr(): s=0x%.8x hwptr=%d total_bytes=%d count=%d \n",
1134                                 (unsigned) s, d->hwptr, 
1135                                 d->total_bytes, d->count));
1136         }
1137 }
1138
1139 static int mixer_ioctl(struct cs4297a_state *s, unsigned int cmd,
1140                        unsigned long arg)
1141 {
1142         // Index to mixer_src[] is value of AC97 Input Mux Select Reg.
1143         // Value of array member is recording source Device ID Mask.
1144         static const unsigned int mixer_src[8] = {
1145                 SOUND_MASK_MIC, SOUND_MASK_CD, 0, SOUND_MASK_LINE1,
1146                 SOUND_MASK_LINE, SOUND_MASK_VOLUME, 0, 0
1147         };
1148
1149         // Index of mixtable1[] member is Device ID 
1150         // and must be <= SOUND_MIXER_NRDEVICES.
1151         // Value of array member is index into s->mix.vol[]
1152         static const unsigned char mixtable1[SOUND_MIXER_NRDEVICES] = {
1153                 [SOUND_MIXER_PCM] = 1,  // voice 
1154                 [SOUND_MIXER_LINE1] = 2,        // AUX
1155                 [SOUND_MIXER_CD] = 3,   // CD 
1156                 [SOUND_MIXER_LINE] = 4, // Line 
1157                 [SOUND_MIXER_SYNTH] = 5,        // FM
1158                 [SOUND_MIXER_MIC] = 6,  // Mic 
1159                 [SOUND_MIXER_SPEAKER] = 7,      // Speaker 
1160                 [SOUND_MIXER_RECLEV] = 8,       // Recording level 
1161                 [SOUND_MIXER_VOLUME] = 9        // Master Volume 
1162         };
1163
1164         static const unsigned mixreg[] = {
1165                 AC97_PCMOUT_VOL,
1166                 AC97_AUX_VOL,
1167                 AC97_CD_VOL,
1168                 AC97_LINEIN_VOL
1169         };
1170         unsigned char l, r, rl, rr, vidx;
1171         unsigned char attentbl[11] =
1172             { 63, 42, 26, 17, 14, 11, 8, 6, 4, 2, 0 };
1173         unsigned temp1;
1174         int i, val;
1175
1176         VALIDATE_STATE(s);
1177         CS_DBGOUT(CS_FUNCTION, 4, printk(KERN_INFO
1178                  "cs4297a: mixer_ioctl(): s=0x%.8x cmd=0x%.8x\n",
1179                          (unsigned) s, cmd));
1180 #if CSDEBUG
1181         cs_printioctl(cmd);
1182 #endif
1183 #if CSDEBUG_INTERFACE
1184
1185         if ((cmd == SOUND_MIXER_CS_GETDBGMASK) ||
1186             (cmd == SOUND_MIXER_CS_SETDBGMASK) ||
1187             (cmd == SOUND_MIXER_CS_GETDBGLEVEL) ||
1188             (cmd == SOUND_MIXER_CS_SETDBGLEVEL))
1189         {
1190                 switch (cmd) {
1191
1192                 case SOUND_MIXER_CS_GETDBGMASK:
1193                         return put_user(cs_debugmask,
1194                                         (unsigned long *) arg);
1195
1196                 case SOUND_MIXER_CS_GETDBGLEVEL:
1197                         return put_user(cs_debuglevel,
1198                                         (unsigned long *) arg);
1199
1200                 case SOUND_MIXER_CS_SETDBGMASK:
1201                         if (get_user(val, (unsigned long *) arg))
1202                                 return -EFAULT;
1203                         cs_debugmask = val;
1204                         return 0;
1205
1206                 case SOUND_MIXER_CS_SETDBGLEVEL:
1207                         if (get_user(val, (unsigned long *) arg))
1208                                 return -EFAULT;
1209                         cs_debuglevel = val;
1210                         return 0;
1211                 default:
1212                         CS_DBGOUT(CS_ERROR, 1, printk(KERN_INFO
1213                                 "cs4297a: mixer_ioctl(): ERROR unknown debug cmd\n"));
1214                         return 0;
1215                 }
1216         }
1217 #endif
1218
1219         if (cmd == SOUND_MIXER_PRIVATE1) {
1220                 return -EINVAL;
1221         }
1222         if (cmd == SOUND_MIXER_PRIVATE2) {
1223                 // enable/disable/query spatializer 
1224                 if (get_user(val, (int *) arg))
1225                         return -EFAULT;
1226                 if (val != -1) {
1227                         temp1 = (val & 0x3f) >> 2;
1228                         cs4297a_write_ac97(s, AC97_3D_CONTROL, temp1);
1229                         cs4297a_read_ac97(s, AC97_GENERAL_PURPOSE,
1230                                          &temp1);
1231                         cs4297a_write_ac97(s, AC97_GENERAL_PURPOSE,
1232                                           temp1 | 0x2000);
1233                 }
1234                 cs4297a_read_ac97(s, AC97_3D_CONTROL, &temp1);
1235                 return put_user((temp1 << 2) | 3, (int *) arg);
1236         }
1237         if (cmd == SOUND_MIXER_INFO) {
1238                 mixer_info info;
1239                 memset(&info, 0, sizeof(info));
1240                 strlcpy(info.id, "CS4297a", sizeof(info.id));
1241                 strlcpy(info.name, "Crystal CS4297a", sizeof(info.name));
1242                 info.modify_counter = s->mix.modcnt;
1243                 if (copy_to_user((void *) arg, &info, sizeof(info)))
1244                         return -EFAULT;
1245                 return 0;
1246         }
1247         if (cmd == SOUND_OLD_MIXER_INFO) {
1248                 _old_mixer_info info;
1249                 memset(&info, 0, sizeof(info));
1250                 strlcpy(info.id, "CS4297a", sizeof(info.id));
1251                 strlcpy(info.name, "Crystal CS4297a", sizeof(info.name));
1252                 if (copy_to_user((void *) arg, &info, sizeof(info)))
1253                         return -EFAULT;
1254                 return 0;
1255         }
1256         if (cmd == OSS_GETVERSION)
1257                 return put_user(SOUND_VERSION, (int *) arg);
1258
1259         if (_IOC_TYPE(cmd) != 'M' || _SIOC_SIZE(cmd) != sizeof(int))
1260                 return -EINVAL;
1261
1262         // If ioctl has only the SIOC_READ bit(bit 31)
1263         // on, process the only-read commands. 
1264         if (_SIOC_DIR(cmd) == _SIOC_READ) {
1265                 switch (_IOC_NR(cmd)) {
1266                 case SOUND_MIXER_RECSRC:        // Arg contains a bit for each recording source 
1267                         cs4297a_read_ac97(s, AC97_RECORD_SELECT,
1268                                          &temp1);
1269                         return put_user(mixer_src[temp1 & 7], (int *) arg);
1270
1271                 case SOUND_MIXER_DEVMASK:       // Arg contains a bit for each supported device 
1272                         return put_user(SOUND_MASK_PCM | SOUND_MASK_LINE |
1273                                         SOUND_MASK_VOLUME | SOUND_MASK_RECLEV,
1274                                         (int *) arg);
1275
1276                 case SOUND_MIXER_RECMASK:       // Arg contains a bit for each supported recording source 
1277                         return put_user(SOUND_MASK_LINE | SOUND_MASK_VOLUME,
1278                                         (int *) arg);
1279
1280                 case SOUND_MIXER_STEREODEVS:    // Mixer channels supporting stereo 
1281                         return put_user(SOUND_MASK_PCM | SOUND_MASK_LINE |
1282                                         SOUND_MASK_VOLUME | SOUND_MASK_RECLEV,
1283                                         (int *) arg);
1284
1285                 case SOUND_MIXER_CAPS:
1286                         return put_user(SOUND_CAP_EXCL_INPUT, (int *) arg);
1287
1288                 default:
1289                         i = _IOC_NR(cmd);
1290                         if (i >= SOUND_MIXER_NRDEVICES
1291                             || !(vidx = mixtable1[i]))
1292                                 return -EINVAL;
1293                         return put_user(s->mix.vol[vidx - 1], (int *) arg);
1294                 }
1295         }
1296         // If ioctl doesn't have both the SIOC_READ and 
1297         // the SIOC_WRITE bit set, return invalid.
1298         if (_SIOC_DIR(cmd) != (_SIOC_READ | _SIOC_WRITE))
1299                 return -EINVAL;
1300
1301         // Increment the count of volume writes.
1302         s->mix.modcnt++;
1303
1304         // Isolate the command; it must be a write.
1305         switch (_IOC_NR(cmd)) {
1306
1307         case SOUND_MIXER_RECSRC:        // Arg contains a bit for each recording source 
1308                 if (get_user(val, (int *) arg))
1309                         return -EFAULT;
1310                 i = hweight32(val);     // i = # bits on in val.
1311                 if (i != 1)     // One & only 1 bit must be on.
1312                         return 0;
1313                 for (i = 0; i < sizeof(mixer_src) / sizeof(int); i++) {
1314                         if (val == mixer_src[i]) {
1315                                 temp1 = (i << 8) | i;
1316                                 cs4297a_write_ac97(s,
1317                                                   AC97_RECORD_SELECT,
1318                                                   temp1);
1319                                 return 0;
1320                         }
1321                 }
1322                 return 0;
1323
1324         case SOUND_MIXER_VOLUME:
1325                 if (get_user(val, (int *) arg))
1326                         return -EFAULT;
1327                 l = val & 0xff;
1328                 if (l > 100)
1329                         l = 100;        // Max soundcard.h vol is 100.
1330                 if (l < 6) {
1331                         rl = 63;
1332                         l = 0;
1333                 } else
1334                         rl = attentbl[(10 * l) / 100];  // Convert 0-100 vol to 63-0 atten.
1335
1336                 r = (val >> 8) & 0xff;
1337                 if (r > 100)
1338                         r = 100;        // Max right volume is 100, too
1339                 if (r < 6) {
1340                         rr = 63;
1341                         r = 0;
1342                 } else
1343                         rr = attentbl[(10 * r) / 100];  // Convert volume to attenuation.
1344
1345                 if ((rl > 60) && (rr > 60))     // If both l & r are 'low',          
1346                         temp1 = 0x8000; //  turn on the mute bit.
1347                 else
1348                         temp1 = 0;
1349
1350                 temp1 |= (rl << 8) | rr;
1351
1352                 cs4297a_write_ac97(s, AC97_MASTER_VOL_STEREO, temp1);
1353                 cs4297a_write_ac97(s, AC97_PHONE_VOL, temp1);
1354
1355 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1356                 s->mix.vol[8] = ((unsigned int) r << 8) | l;
1357 #else
1358                 s->mix.vol[8] = val;
1359 #endif
1360                 return put_user(s->mix.vol[8], (int *) arg);
1361
1362         case SOUND_MIXER_SPEAKER:
1363                 if (get_user(val, (int *) arg))
1364                         return -EFAULT;
1365                 l = val & 0xff;
1366                 if (l > 100)
1367                         l = 100;
1368                 if (l < 3) {
1369                         rl = 0;
1370                         l = 0;
1371                 } else {
1372                         rl = (l * 2 - 5) / 13;  // Convert 0-100 range to 0-15.
1373                         l = (rl * 13 + 5) / 2;
1374                 }
1375
1376                 if (rl < 3) {
1377                         temp1 = 0x8000;
1378                         rl = 0;
1379                 } else
1380                         temp1 = 0;
1381                 rl = 15 - rl;   // Convert volume to attenuation.
1382                 temp1 |= rl << 1;
1383                 cs4297a_write_ac97(s, AC97_PCBEEP_VOL, temp1);
1384
1385 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1386                 s->mix.vol[6] = l << 8;
1387 #else
1388                 s->mix.vol[6] = val;
1389 #endif
1390                 return put_user(s->mix.vol[6], (int *) arg);
1391
1392         case SOUND_MIXER_RECLEV:
1393                 if (get_user(val, (int *) arg))
1394                         return -EFAULT;
1395                 l = val & 0xff;
1396                 if (l > 100)
1397                         l = 100;
1398                 r = (val >> 8) & 0xff;
1399                 if (r > 100)
1400                         r = 100;
1401                 rl = (l * 2 - 5) / 13;  // Convert 0-100 scale to 0-15.
1402                 rr = (r * 2 - 5) / 13;
1403                 if (rl < 3 && rr < 3)
1404                         temp1 = 0x8000;
1405                 else
1406                         temp1 = 0;
1407
1408                 temp1 = temp1 | (rl << 8) | rr;
1409                 cs4297a_write_ac97(s, AC97_RECORD_GAIN, temp1);
1410
1411 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1412                 s->mix.vol[7] = ((unsigned int) r << 8) | l;
1413 #else
1414                 s->mix.vol[7] = val;
1415 #endif
1416                 return put_user(s->mix.vol[7], (int *) arg);
1417
1418         case SOUND_MIXER_MIC:
1419                 if (get_user(val, (int *) arg))
1420                         return -EFAULT;
1421                 l = val & 0xff;
1422                 if (l > 100)
1423                         l = 100;
1424                 if (l < 1) {
1425                         l = 0;
1426                         rl = 0;
1427                 } else {
1428                         rl = ((unsigned) l * 5 - 4) / 16;       // Convert 0-100 range to 0-31.
1429                         l = (rl * 16 + 4) / 5;
1430                 }
1431                 cs4297a_read_ac97(s, AC97_MIC_VOL, &temp1);
1432                 temp1 &= 0x40;  // Isolate 20db gain bit.
1433                 if (rl < 3) {
1434                         temp1 |= 0x8000;
1435                         rl = 0;
1436                 }
1437                 rl = 31 - rl;   // Convert volume to attenuation.
1438                 temp1 |= rl;
1439                 cs4297a_write_ac97(s, AC97_MIC_VOL, temp1);
1440
1441 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1442                 s->mix.vol[5] = val << 8;
1443 #else
1444                 s->mix.vol[5] = val;
1445 #endif
1446                 return put_user(s->mix.vol[5], (int *) arg);
1447
1448
1449         case SOUND_MIXER_SYNTH:
1450                 if (get_user(val, (int *) arg))
1451                         return -EFAULT;
1452                 l = val & 0xff;
1453                 if (l > 100)
1454                         l = 100;
1455                 if (get_user(val, (int *) arg))
1456                         return -EFAULT;
1457                 r = (val >> 8) & 0xff;
1458                 if (r > 100)
1459                         r = 100;
1460                 rl = (l * 2 - 11) / 3;  // Convert 0-100 range to 0-63.
1461                 rr = (r * 2 - 11) / 3;
1462                 if (rl < 3)     // If l is low, turn on
1463                         temp1 = 0x0080; //  the mute bit.
1464                 else
1465                         temp1 = 0;
1466
1467                 rl = 63 - rl;   // Convert vol to attenuation.
1468 //              writel(temp1 | rl, s->pBA0 + FMLVC);
1469                 if (rr < 3)     //  If rr is low, turn on
1470                         temp1 = 0x0080; //   the mute bit.
1471                 else
1472                         temp1 = 0;
1473                 rr = 63 - rr;   // Convert vol to attenuation.
1474 //              writel(temp1 | rr, s->pBA0 + FMRVC);
1475
1476 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1477                 s->mix.vol[4] = (r << 8) | l;
1478 #else
1479                 s->mix.vol[4] = val;
1480 #endif
1481                 return put_user(s->mix.vol[4], (int *) arg);
1482
1483
1484         default:
1485                 CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
1486                         "cs4297a: mixer_ioctl(): default\n"));
1487
1488                 i = _IOC_NR(cmd);
1489                 if (i >= SOUND_MIXER_NRDEVICES || !(vidx = mixtable1[i]))
1490                         return -EINVAL;
1491                 if (get_user(val, (int *) arg))
1492                         return -EFAULT;
1493                 l = val & 0xff;
1494                 if (l > 100)
1495                         l = 100;
1496                 if (l < 1) {
1497                         l = 0;
1498                         rl = 31;
1499                 } else
1500                         rl = (attentbl[(l * 10) / 100]) >> 1;
1501
1502                 r = (val >> 8) & 0xff;
1503                 if (r > 100)
1504                         r = 100;
1505                 if (r < 1) {
1506                         r = 0;
1507                         rr = 31;
1508                 } else
1509                         rr = (attentbl[(r * 10) / 100]) >> 1;
1510                 if ((rl > 30) && (rr > 30))
1511                         temp1 = 0x8000;
1512                 else
1513                         temp1 = 0;
1514                 temp1 = temp1 | (rl << 8) | rr;
1515                 cs4297a_write_ac97(s, mixreg[vidx - 1], temp1);
1516
1517 #ifdef OSS_DOCUMENTED_MIXER_SEMANTICS
1518                 s->mix.vol[vidx - 1] = ((unsigned int) r << 8) | l;
1519 #else
1520                 s->mix.vol[vidx - 1] = val;
1521 #endif
1522                 return put_user(s->mix.vol[vidx - 1], (int *) arg);
1523         }
1524 }
1525
1526
1527 // --------------------------------------------------------------------- 
1528
1529 static int cs4297a_open_mixdev(struct inode *inode, struct file *file)
1530 {
1531         int minor = iminor(inode);
1532         struct cs4297a_state *s=NULL;
1533         struct list_head *entry;
1534
1535         CS_DBGOUT(CS_FUNCTION | CS_OPEN, 4,
1536                   printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()+\n"));
1537
1538         mutex_lock(&swarm_cs4297a_mutex);
1539         list_for_each(entry, &cs4297a_devs)
1540         {
1541                 s = list_entry(entry, struct cs4297a_state, list);
1542                 if(s->dev_mixer == minor)
1543                         break;
1544         }
1545         if (!s)
1546         {
1547                 CS_DBGOUT(CS_FUNCTION | CS_OPEN | CS_ERROR, 2,
1548                         printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()- -ENODEV\n"));
1549
1550                 mutex_unlock(&swarm_cs4297a_mutex);
1551                 return -ENODEV;
1552         }
1553         VALIDATE_STATE(s);
1554         file->private_data = s;
1555
1556         CS_DBGOUT(CS_FUNCTION | CS_OPEN, 4,
1557                   printk(KERN_INFO "cs4297a: cs4297a_open_mixdev()- 0\n"));
1558         mutex_unlock(&swarm_cs4297a_mutex);
1559
1560         return nonseekable_open(inode, file);
1561 }
1562
1563
1564 static int cs4297a_release_mixdev(struct inode *inode, struct file *file)
1565 {
1566         struct cs4297a_state *s =
1567             (struct cs4297a_state *) file->private_data;
1568
1569         VALIDATE_STATE(s);
1570         return 0;
1571 }
1572
1573
1574 static int cs4297a_ioctl_mixdev(struct file *file,
1575                                unsigned int cmd, unsigned long arg)
1576 {
1577         int ret;
1578         mutex_lock(&swarm_cs4297a_mutex);
1579         ret = mixer_ioctl((struct cs4297a_state *) file->private_data, cmd,
1580                            arg);
1581         mutex_unlock(&swarm_cs4297a_mutex);
1582         return ret;
1583 }
1584
1585
1586 // ******************************************************************************************
1587 //   Mixer file operations struct.
1588 // ******************************************************************************************
1589 static const struct file_operations cs4297a_mixer_fops = {
1590         .owner          = THIS_MODULE,
1591         .llseek         = no_llseek,
1592         .unlocked_ioctl = cs4297a_ioctl_mixdev,
1593         .open           = cs4297a_open_mixdev,
1594         .release        = cs4297a_release_mixdev,
1595 };
1596
1597 // --------------------------------------------------------------------- 
1598
1599
1600 static int drain_adc(struct cs4297a_state *s, int nonblock)
1601 {
1602         /* This routine serves no purpose currently - any samples
1603            sitting in the receive queue will just be processed by the
1604            background consumer.  This would be different if DMA
1605            actually stopped when there were no clients. */
1606         return 0;
1607 }
1608
1609 static int drain_dac(struct cs4297a_state *s, int nonblock)
1610 {
1611         DECLARE_WAITQUEUE(wait, current);
1612         unsigned long flags;
1613         unsigned hwptr;
1614         unsigned tmo;
1615         int count;
1616
1617         if (s->dma_dac.mapped)
1618                 return 0;
1619         if (nonblock)
1620                 return -EBUSY;
1621         add_wait_queue(&s->dma_dac.wait, &wait);
1622         while ((count = __raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_TX))) ||
1623                (s->dma_dac.count > 0)) {
1624                 if (!signal_pending(current)) {
1625                         set_current_state(TASK_INTERRUPTIBLE);
1626                         /* XXXKW is this calculation working? */
1627                         tmo = ((count * FRAME_TX_US) * HZ) / 1000000;
1628                         schedule_timeout(tmo + 1);
1629                 } else {
1630                         /* XXXKW do I care if there is a signal pending? */
1631                 }
1632         }
1633         spin_lock_irqsave(&s->lock, flags);
1634         /* Reset the bookkeeping */
1635         hwptr = (int)(((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
1636                        s->dma_dac.descrtab_phys) / sizeof(serdma_descr_t));
1637         s->dma_dac.hwptr = s->dma_dac.swptr = hwptr;
1638         spin_unlock_irqrestore(&s->lock, flags);
1639         remove_wait_queue(&s->dma_dac.wait, &wait);
1640         current->state = TASK_RUNNING;
1641         return 0;
1642 }
1643
1644
1645 // --------------------------------------------------------------------- 
1646
1647 static ssize_t cs4297a_read(struct file *file, char *buffer, size_t count,
1648                            loff_t * ppos)
1649 {
1650         struct cs4297a_state *s =
1651             (struct cs4297a_state *) file->private_data;
1652         ssize_t ret;
1653         unsigned long flags;
1654         int cnt, count_fr, cnt_by;
1655         unsigned copied = 0;
1656
1657         CS_DBGOUT(CS_FUNCTION | CS_WAVE_READ, 2,
1658                   printk(KERN_INFO "cs4297a: cs4297a_read()+ %d \n", count));
1659
1660         VALIDATE_STATE(s);
1661         if (s->dma_adc.mapped)
1662                 return -ENXIO;
1663         if (!s->dma_adc.ready && (ret = prog_dmabuf_adc(s)))
1664                 return ret;
1665         if (!access_ok(VERIFY_WRITE, buffer, count))
1666                 return -EFAULT;
1667         ret = 0;
1668 //
1669 // "count" is the amount of bytes to read (from app), is decremented each loop
1670 //      by the amount of bytes that have been returned to the user buffer.
1671 // "cnt" is the running total of each read from the buffer (changes each loop)
1672 // "buffer" points to the app's buffer
1673 // "ret" keeps a running total of the amount of bytes that have been copied
1674 //      to the user buffer.
1675 // "copied" is the total bytes copied into the user buffer for each loop.
1676 //
1677         while (count > 0) {
1678                 CS_DBGOUT(CS_WAVE_READ, 8, printk(KERN_INFO
1679                         "_read() count>0 count=%d .count=%d .swptr=%d .hwptr=%d \n",
1680                                 count, s->dma_adc.count,
1681                                 s->dma_adc.swptr, s->dma_adc.hwptr));
1682                 spin_lock_irqsave(&s->lock, flags);
1683
1684                 /* cnt will be the number of available samples (16-bit
1685                    stereo); it starts out as the maxmimum consequetive
1686                    samples */
1687                 cnt = (s->dma_adc.sb_end - s->dma_adc.sb_swptr) / 2;
1688                 count_fr = s->dma_adc.count / FRAME_SAMPLE_BYTES;
1689
1690                 // dma_adc.count is the current total bytes that have not been read.
1691                 // if the amount of unread bytes from the current sw pointer to the
1692                 // end of the buffer is greater than the current total bytes that
1693                 // have not been read, then set the "cnt" (unread bytes) to the
1694                 // amount of unread bytes.  
1695
1696                 if (count_fr < cnt)
1697                         cnt = count_fr;
1698                 cnt_by = cnt * FRAME_SAMPLE_BYTES;
1699                 spin_unlock_irqrestore(&s->lock, flags);
1700                 //
1701                 // if we are converting from 8/16 then we need to copy
1702                 // twice the number of 16 bit bytes then 8 bit bytes.
1703                 // 
1704                 if (s->conversion) {
1705                         if (cnt_by > (count * 2)) {
1706                                 cnt = (count * 2) / FRAME_SAMPLE_BYTES;
1707                                 cnt_by = count * 2;
1708                         }
1709                 } else {
1710                         if (cnt_by > count) {
1711                                 cnt = count / FRAME_SAMPLE_BYTES;
1712                                 cnt_by = count;
1713                         }
1714                 }
1715                 //
1716                 // "cnt" NOW is the smaller of the amount that will be read,
1717                 // and the amount that is requested in this read (or partial).
1718                 // if there are no bytes in the buffer to read, then start the
1719                 // ADC and wait for the interrupt handler to wake us up.
1720                 //
1721                 if (cnt <= 0) {
1722
1723                         // start up the dma engine and then continue back to the top of
1724                         // the loop when wake up occurs.
1725                         start_adc(s);
1726                         if (file->f_flags & O_NONBLOCK)
1727                                 return ret ? ret : -EAGAIN;
1728                         interruptible_sleep_on(&s->dma_adc.wait);
1729                         if (signal_pending(current))
1730                                 return ret ? ret : -ERESTARTSYS;
1731                         continue;
1732                 }
1733                 // there are bytes in the buffer to read.
1734                 // copy from the hw buffer over to the user buffer.
1735                 // user buffer is designated by "buffer"
1736                 // virtual address to copy from is dma_buf+swptr
1737                 // the "cnt" is the number of bytes to read.
1738
1739                 CS_DBGOUT(CS_WAVE_READ, 2, printk(KERN_INFO
1740                         "_read() copy_to cnt=%d count=%d ", cnt_by, count));
1741                 CS_DBGOUT(CS_WAVE_READ, 8, printk(KERN_INFO
1742                          " .sbufsz=%d .count=%d buffer=0x%.8x ret=%d\n",
1743                                  s->dma_adc.sbufsz, s->dma_adc.count,
1744                                  (unsigned) buffer, ret));
1745
1746                 if (copy_to_user (buffer, ((void *)s->dma_adc.sb_swptr), cnt_by))
1747                         return ret ? ret : -EFAULT;
1748                 copied = cnt_by;
1749
1750                 /* Return the descriptors */
1751                 spin_lock_irqsave(&s->lock, flags);
1752                 CS_DBGOUT(CS_FUNCTION, 2, 
1753                           printk(KERN_INFO "cs4297a: upd_rcv sw->hw %x/%x\n", s->dma_adc.swptr, s->dma_adc.hwptr));
1754                 s->dma_adc.count -= cnt_by;
1755                 s->dma_adc.sb_swptr += cnt * 2;
1756                 if (s->dma_adc.sb_swptr == s->dma_adc.sb_end)
1757                         s->dma_adc.sb_swptr = s->dma_adc.sample_buf;
1758                 spin_unlock_irqrestore(&s->lock, flags);
1759                 count -= copied;
1760                 buffer += copied;
1761                 ret += copied;
1762                 start_adc(s);
1763         }
1764         CS_DBGOUT(CS_FUNCTION | CS_WAVE_READ, 2,
1765                   printk(KERN_INFO "cs4297a: cs4297a_read()- %d\n", ret));
1766         return ret;
1767 }
1768
1769
1770 static ssize_t cs4297a_write(struct file *file, const char *buffer,
1771                             size_t count, loff_t * ppos)
1772 {
1773         struct cs4297a_state *s =
1774             (struct cs4297a_state *) file->private_data;
1775         ssize_t ret;
1776         unsigned long flags;
1777         unsigned swptr, hwptr;
1778         int cnt;
1779
1780         CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE, 2,
1781                   printk(KERN_INFO "cs4297a: cs4297a_write()+ count=%d\n",
1782                          count));
1783         VALIDATE_STATE(s);
1784
1785         if (s->dma_dac.mapped)
1786                 return -ENXIO;
1787         if (!s->dma_dac.ready && (ret = prog_dmabuf_dac(s)))
1788                 return ret;
1789         if (!access_ok(VERIFY_READ, buffer, count))
1790                 return -EFAULT;
1791         ret = 0;
1792         while (count > 0) {
1793                 serdma_t *d = &s->dma_dac;
1794                 int copy_cnt;
1795                 u32 *s_tmpl;
1796                 u32 *t_tmpl;
1797                 u32 left, right;
1798                 int swap = (s->prop_dac.fmt == AFMT_S16_LE) || (s->prop_dac.fmt == AFMT_U16_LE);
1799                 
1800                 /* XXXXXX this is broken for BLOAT_FACTOR */
1801                 spin_lock_irqsave(&s->lock, flags);
1802                 if (d->count < 0) {
1803                         d->count = 0;
1804                         d->swptr = d->hwptr;
1805                 }
1806                 if (d->underrun) {
1807                         d->underrun = 0;
1808                         hwptr = (unsigned) (((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
1809                                              d->descrtab_phys) / sizeof(serdma_descr_t));
1810                         d->swptr = d->hwptr = hwptr;
1811                 }
1812                 swptr = d->swptr;
1813                 cnt = d->sbufsz - (swptr * FRAME_SAMPLE_BYTES);
1814                 /* Will this write fill up the buffer? */
1815                 if (d->count + cnt > d->sbufsz)
1816                         cnt = d->sbufsz - d->count;
1817                 spin_unlock_irqrestore(&s->lock, flags);
1818                 if (cnt > count)
1819                         cnt = count;
1820                 if (cnt <= 0) {
1821                         start_dac(s);
1822                         if (file->f_flags & O_NONBLOCK)
1823                                 return ret ? ret : -EAGAIN;
1824                         interruptible_sleep_on(&d->wait);
1825                         if (signal_pending(current))
1826                                 return ret ? ret : -ERESTARTSYS;
1827                         continue;
1828                 }
1829                 if (copy_from_user(d->sample_buf, buffer, cnt))
1830                         return ret ? ret : -EFAULT;
1831
1832                 copy_cnt = cnt;
1833                 s_tmpl = (u32 *)d->sample_buf;
1834                 t_tmpl = (u32 *)(d->dma_buf + (swptr * 4));
1835
1836                 /* XXXKW assuming 16-bit stereo! */
1837                 do {
1838                         u32 tmp;
1839
1840                         t_tmpl[0] = cpu_to_be32(0x98000000);
1841
1842                         tmp = be32_to_cpu(s_tmpl[0]);
1843                         left = tmp & 0xffff;
1844                         right = tmp >> 16;
1845                         if (swap) {
1846                                 left = swab16(left);
1847                                 right = swab16(right);
1848                         }
1849                         t_tmpl[1] = cpu_to_be32(left >> 8);
1850                         t_tmpl[2] = cpu_to_be32(((left & 0xff) << 24) |
1851                                                 (right << 4));
1852
1853                         s_tmpl++;
1854                         t_tmpl += 8;
1855                         copy_cnt -= 4;
1856                 } while (copy_cnt);
1857
1858                 /* Mux in any pending read/write accesses */
1859                 if (s->reg_request) {
1860                         *(u64 *)(d->dma_buf + (swptr * 4)) |=
1861                                 cpu_to_be64(s->reg_request);
1862                         s->reg_request = 0;
1863                         wake_up(&s->dma_dac.reg_wait);
1864                 }
1865
1866                 CS_DBGOUT(CS_WAVE_WRITE, 4,
1867                           printk(KERN_INFO
1868                                  "cs4297a: copy in %d to swptr %x\n", cnt, swptr));
1869
1870                 swptr = (swptr + (cnt/FRAME_SAMPLE_BYTES)) % d->ringsz;
1871                 __raw_writeq(cnt/FRAME_SAMPLE_BYTES, SS_CSR(R_SER_DMA_DSCR_COUNT_TX));
1872                 spin_lock_irqsave(&s->lock, flags);
1873                 d->swptr = swptr;
1874                 d->count += cnt;
1875                 d->endcleared = 0;
1876                 spin_unlock_irqrestore(&s->lock, flags);
1877                 count -= cnt;
1878                 buffer += cnt;
1879                 ret += cnt;
1880                 start_dac(s);
1881         }
1882         CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE, 2,
1883                   printk(KERN_INFO "cs4297a: cs4297a_write()- %d\n", ret));
1884         return ret;
1885 }
1886
1887
1888 static unsigned int cs4297a_poll(struct file *file,
1889                                 struct poll_table_struct *wait)
1890 {
1891         struct cs4297a_state *s =
1892             (struct cs4297a_state *) file->private_data;
1893         unsigned long flags;
1894         unsigned int mask = 0;
1895
1896         CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
1897                   printk(KERN_INFO "cs4297a: cs4297a_poll()+\n"));
1898         VALIDATE_STATE(s);
1899         if (file->f_mode & FMODE_WRITE) {
1900                 CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
1901                           printk(KERN_INFO
1902                                  "cs4297a: cs4297a_poll() wait on FMODE_WRITE\n"));
1903                 if(!s->dma_dac.ready && prog_dmabuf_dac(s))
1904                         return 0;
1905                 poll_wait(file, &s->dma_dac.wait, wait);
1906         }
1907         if (file->f_mode & FMODE_READ) {
1908                 CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
1909                           printk(KERN_INFO
1910                                  "cs4297a: cs4297a_poll() wait on FMODE_READ\n"));
1911                 if(!s->dma_dac.ready && prog_dmabuf_adc(s))
1912                         return 0;
1913                 poll_wait(file, &s->dma_adc.wait, wait);
1914         }
1915         spin_lock_irqsave(&s->lock, flags);
1916         cs4297a_update_ptr(s,CS_FALSE);
1917         if (file->f_mode & FMODE_WRITE) {
1918                 if (s->dma_dac.mapped) {
1919                         if (s->dma_dac.count >=
1920                             (signed) s->dma_dac.fragsize) {
1921                                 if (s->dma_dac.wakeup)
1922                                         mask |= POLLOUT | POLLWRNORM;
1923                                 else
1924                                         mask = 0;
1925                                 s->dma_dac.wakeup = 0;
1926                         }
1927                 } else {
1928                         if ((signed) (s->dma_dac.sbufsz/2) >= s->dma_dac.count)
1929                                 mask |= POLLOUT | POLLWRNORM;
1930                 }
1931         } else if (file->f_mode & FMODE_READ) {
1932                 if (s->dma_adc.mapped) {
1933                         if (s->dma_adc.count >= (signed) s->dma_adc.fragsize) 
1934                                 mask |= POLLIN | POLLRDNORM;
1935                 } else {
1936                         if (s->dma_adc.count > 0)
1937                                 mask |= POLLIN | POLLRDNORM;
1938                 }
1939         }
1940         spin_unlock_irqrestore(&s->lock, flags);
1941         CS_DBGOUT(CS_FUNCTION | CS_WAVE_WRITE | CS_WAVE_READ, 4,
1942                   printk(KERN_INFO "cs4297a: cs4297a_poll()- 0x%.8x\n",
1943                          mask));
1944         return mask;
1945 }
1946
1947
1948 static int cs4297a_mmap(struct file *file, struct vm_area_struct *vma)
1949 {
1950         /* XXXKW currently no mmap support */
1951         return -EINVAL;
1952         return 0;
1953 }
1954
1955
1956 static int cs4297a_ioctl(struct file *file,
1957                         unsigned int cmd, unsigned long arg)
1958 {
1959         struct cs4297a_state *s =
1960             (struct cs4297a_state *) file->private_data;
1961         unsigned long flags;
1962         audio_buf_info abinfo;
1963         count_info cinfo;
1964         int val, mapped, ret;
1965
1966         CS_DBGOUT(CS_FUNCTION|CS_IOCTL, 4, printk(KERN_INFO
1967                  "cs4297a: cs4297a_ioctl(): file=0x%.8x cmd=0x%.8x\n",
1968                          (unsigned) file, cmd));
1969 #if CSDEBUG
1970         cs_printioctl(cmd);
1971 #endif
1972         VALIDATE_STATE(s);
1973         mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1974             ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1975         switch (cmd) {
1976         case OSS_GETVERSION:
1977                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
1978                         "cs4297a: cs4297a_ioctl(): SOUND_VERSION=0x%.8x\n",
1979                                  SOUND_VERSION));
1980                 return put_user(SOUND_VERSION, (int *) arg);
1981
1982         case SNDCTL_DSP_SYNC:
1983                 CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
1984                          "cs4297a: cs4297a_ioctl(): DSP_SYNC\n"));
1985                 if (file->f_mode & FMODE_WRITE)
1986                         return drain_dac(s,
1987                                          0 /*file->f_flags & O_NONBLOCK */
1988                                          );
1989                 return 0;
1990
1991         case SNDCTL_DSP_SETDUPLEX:
1992                 return 0;
1993
1994         case SNDCTL_DSP_GETCAPS:
1995                 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1996                                 DSP_CAP_TRIGGER | DSP_CAP_MMAP,
1997                                 (int *) arg);
1998
1999         case SNDCTL_DSP_RESET:
2000                 CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
2001                          "cs4297a: cs4297a_ioctl(): DSP_RESET\n"));
2002                 if (file->f_mode & FMODE_WRITE) {
2003                         stop_dac(s);
2004                         synchronize_irq(s->irq);
2005                         s->dma_dac.count = s->dma_dac.total_bytes =
2006                                 s->dma_dac.blocks = s->dma_dac.wakeup = 0;
2007                         s->dma_dac.swptr = s->dma_dac.hwptr =
2008                                 (int)(((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_TX)) & M_DMA_CURDSCR_ADDR) -
2009                                        s->dma_dac.descrtab_phys) / sizeof(serdma_descr_t));
2010                 }
2011                 if (file->f_mode & FMODE_READ) {
2012                         stop_adc(s);
2013                         synchronize_irq(s->irq);
2014                         s->dma_adc.count = s->dma_adc.total_bytes =
2015                                 s->dma_adc.blocks = s->dma_dac.wakeup = 0;
2016                         s->dma_adc.swptr = s->dma_adc.hwptr =
2017                                 (int)(((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
2018                                        s->dma_adc.descrtab_phys) / sizeof(serdma_descr_t));
2019                 }
2020                 return 0;
2021
2022         case SNDCTL_DSP_SPEED:
2023                 if (get_user(val, (int *) arg))
2024                         return -EFAULT;
2025                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2026                          "cs4297a: cs4297a_ioctl(): DSP_SPEED val=%d -> 48000\n", val));
2027                 val = 48000;
2028                 return put_user(val, (int *) arg);
2029
2030         case SNDCTL_DSP_STEREO:
2031                 if (get_user(val, (int *) arg))
2032                         return -EFAULT;
2033                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2034                          "cs4297a: cs4297a_ioctl(): DSP_STEREO val=%d\n", val));
2035                 if (file->f_mode & FMODE_READ) {
2036                         stop_adc(s);
2037                         s->dma_adc.ready = 0;
2038                         s->prop_adc.channels = val ? 2 : 1;
2039                 }
2040                 if (file->f_mode & FMODE_WRITE) {
2041                         stop_dac(s);
2042                         s->dma_dac.ready = 0;
2043                         s->prop_dac.channels = val ? 2 : 1;
2044                 }
2045                 return 0;
2046
2047         case SNDCTL_DSP_CHANNELS:
2048                 if (get_user(val, (int *) arg))
2049                         return -EFAULT;
2050                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2051                          "cs4297a: cs4297a_ioctl(): DSP_CHANNELS val=%d\n",
2052                                  val));
2053                 if (val != 0) {
2054                         if (file->f_mode & FMODE_READ) {
2055                                 stop_adc(s);
2056                                 s->dma_adc.ready = 0;
2057                                 if (val >= 2)
2058                                         s->prop_adc.channels = 2;
2059                                 else
2060                                         s->prop_adc.channels = 1;
2061                         }
2062                         if (file->f_mode & FMODE_WRITE) {
2063                                 stop_dac(s);
2064                                 s->dma_dac.ready = 0;
2065                                 if (val >= 2)
2066                                         s->prop_dac.channels = 2;
2067                                 else
2068                                         s->prop_dac.channels = 1;
2069                         }
2070                 }
2071
2072                 if (file->f_mode & FMODE_WRITE)
2073                         val = s->prop_dac.channels;
2074                 else if (file->f_mode & FMODE_READ)
2075                         val = s->prop_adc.channels;
2076
2077                 return put_user(val, (int *) arg);
2078
2079         case SNDCTL_DSP_GETFMTS:        // Returns a mask 
2080                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2081                         "cs4297a: cs4297a_ioctl(): DSP_GETFMT val=0x%.8x\n",
2082                                  AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
2083                                  AFMT_U8));
2084                 return put_user(AFMT_S16_LE | AFMT_U16_LE | AFMT_S8 |
2085                                 AFMT_U8, (int *) arg);
2086
2087         case SNDCTL_DSP_SETFMT:
2088                 if (get_user(val, (int *) arg))
2089                         return -EFAULT;
2090                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2091                          "cs4297a: cs4297a_ioctl(): DSP_SETFMT val=0x%.8x\n",
2092                                  val));
2093                 if (val != AFMT_QUERY) {
2094                         if (file->f_mode & FMODE_READ) {
2095                                 stop_adc(s);
2096                                 s->dma_adc.ready = 0;
2097                                 if (val != AFMT_S16_LE
2098                                     && val != AFMT_U16_LE && val != AFMT_S8
2099                                     && val != AFMT_U8)
2100                                         val = AFMT_U8;
2101                                 s->prop_adc.fmt = val;
2102                                 s->prop_adc.fmt_original = s->prop_adc.fmt;
2103                         }
2104                         if (file->f_mode & FMODE_WRITE) {
2105                                 stop_dac(s);
2106                                 s->dma_dac.ready = 0;
2107                                 if (val != AFMT_S16_LE
2108                                     && val != AFMT_U16_LE && val != AFMT_S8
2109                                     && val != AFMT_U8)
2110                                         val = AFMT_U8;
2111                                 s->prop_dac.fmt = val;
2112                                 s->prop_dac.fmt_original = s->prop_dac.fmt;
2113                         }
2114                 } else {
2115                         if (file->f_mode & FMODE_WRITE)
2116                                 val = s->prop_dac.fmt_original;
2117                         else if (file->f_mode & FMODE_READ)
2118                                 val = s->prop_adc.fmt_original;
2119                 }
2120                 CS_DBGOUT(CS_IOCTL | CS_PARMS, 4, printk(KERN_INFO
2121                   "cs4297a: cs4297a_ioctl(): DSP_SETFMT return val=0x%.8x\n", 
2122                         val));
2123                 return put_user(val, (int *) arg);
2124
2125         case SNDCTL_DSP_POST:
2126                 CS_DBGOUT(CS_IOCTL, 4, printk(KERN_INFO
2127                          "cs4297a: cs4297a_ioctl(): DSP_POST\n"));
2128                 return 0;
2129
2130         case SNDCTL_DSP_GETTRIGGER:
2131                 val = 0;
2132                 if (file->f_mode & s->ena & FMODE_READ)
2133                         val |= PCM_ENABLE_INPUT;
2134                 if (file->f_mode & s->ena & FMODE_WRITE)
2135                         val |= PCM_ENABLE_OUTPUT;
2136                 return put_user(val, (int *) arg);
2137
2138         case SNDCTL_DSP_SETTRIGGER:
2139                 if (get_user(val, (int *) arg))
2140                         return -EFAULT;
2141                 if (file->f_mode & FMODE_READ) {
2142                         if (val & PCM_ENABLE_INPUT) {
2143                                 if (!s->dma_adc.ready
2144                                     && (ret = prog_dmabuf_adc(s)))
2145                                         return ret;
2146                                 start_adc(s);
2147                         } else
2148                                 stop_adc(s);
2149                 }
2150                 if (file->f_mode & FMODE_WRITE) {
2151                         if (val & PCM_ENABLE_OUTPUT) {
2152                                 if (!s->dma_dac.ready
2153                                     && (ret = prog_dmabuf_dac(s)))
2154                                         return ret;
2155                                 start_dac(s);
2156                         } else
2157                                 stop_dac(s);
2158                 }
2159                 return 0;
2160
2161         case SNDCTL_DSP_GETOSPACE:
2162                 if (!(file->f_mode & FMODE_WRITE))
2163                         return -EINVAL;
2164                 if (!s->dma_dac.ready && (val = prog_dmabuf_dac(s)))
2165                         return val;
2166                 spin_lock_irqsave(&s->lock, flags);
2167                 cs4297a_update_ptr(s,CS_FALSE);
2168                 abinfo.fragsize = s->dma_dac.fragsize;
2169                 if (s->dma_dac.mapped)
2170                         abinfo.bytes = s->dma_dac.sbufsz;
2171                 else
2172                         abinfo.bytes =
2173                             s->dma_dac.sbufsz - s->dma_dac.count;
2174                 abinfo.fragstotal = s->dma_dac.numfrag;
2175                 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
2176                 CS_DBGOUT(CS_FUNCTION | CS_PARMS, 4, printk(KERN_INFO
2177                         "cs4297a: cs4297a_ioctl(): GETOSPACE .fragsize=%d .bytes=%d .fragstotal=%d .fragments=%d\n",
2178                                 abinfo.fragsize,abinfo.bytes,abinfo.fragstotal,
2179                                 abinfo.fragments));
2180                 spin_unlock_irqrestore(&s->lock, flags);
2181                 return copy_to_user((void *) arg, &abinfo,
2182                                     sizeof(abinfo)) ? -EFAULT : 0;
2183
2184         case SNDCTL_DSP_GETISPACE:
2185                 if (!(file->f_mode & FMODE_READ))
2186                         return -EINVAL;
2187                 if (!s->dma_adc.ready && (val = prog_dmabuf_adc(s)))
2188                         return val;
2189                 spin_lock_irqsave(&s->lock, flags);
2190                 cs4297a_update_ptr(s,CS_FALSE);
2191                 if (s->conversion) {
2192                         abinfo.fragsize = s->dma_adc.fragsize / 2;
2193                         abinfo.bytes = s->dma_adc.count / 2;
2194                         abinfo.fragstotal = s->dma_adc.numfrag;
2195                         abinfo.fragments =
2196                             abinfo.bytes >> (s->dma_adc.fragshift - 1);
2197                 } else {
2198                         abinfo.fragsize = s->dma_adc.fragsize;
2199                         abinfo.bytes = s->dma_adc.count;
2200                         abinfo.fragstotal = s->dma_adc.numfrag;
2201                         abinfo.fragments =
2202                             abinfo.bytes >> s->dma_adc.fragshift;
2203                 }
2204                 spin_unlock_irqrestore(&s->lock, flags);
2205                 return copy_to_user((void *) arg, &abinfo,
2206                                     sizeof(abinfo)) ? -EFAULT : 0;
2207
2208         case SNDCTL_DSP_NONBLOCK:
2209                 spin_lock(&file->f_lock);
2210                 file->f_flags |= O_NONBLOCK;
2211                 spin_unlock(&file->f_lock);
2212                 return 0;
2213
2214         case SNDCTL_DSP_GETODELAY:
2215                 if (!(file->f_mode & FMODE_WRITE))
2216                         return -EINVAL;
2217                 if(!s->dma_dac.ready && prog_dmabuf_dac(s))
2218                         return 0;
2219                 spin_lock_irqsave(&s->lock, flags);
2220                 cs4297a_update_ptr(s,CS_FALSE);
2221                 val = s->dma_dac.count;
2222                 spin_unlock_irqrestore(&s->lock, flags);
2223                 return put_user(val, (int *) arg);
2224
2225         case SNDCTL_DSP_GETIPTR:
2226                 if (!(file->f_mode & FMODE_READ))
2227                         return -EINVAL;
2228                 if(!s->dma_adc.ready && prog_dmabuf_adc(s))
2229                         return 0;
2230                 spin_lock_irqsave(&s->lock, flags);
2231                 cs4297a_update_ptr(s,CS_FALSE);
2232                 cinfo.bytes = s->dma_adc.total_bytes;
2233                 if (s->dma_adc.mapped) {
2234                         cinfo.blocks =
2235                             (cinfo.bytes >> s->dma_adc.fragshift) -
2236                             s->dma_adc.blocks;
2237                         s->dma_adc.blocks =
2238                             cinfo.bytes >> s->dma_adc.fragshift;
2239                 } else {
2240                         if (s->conversion) {
2241                                 cinfo.blocks =
2242                                     s->dma_adc.count /
2243                                     2 >> (s->dma_adc.fragshift - 1);
2244                         } else
2245                                 cinfo.blocks =
2246                                     s->dma_adc.count >> s->dma_adc.
2247                                     fragshift;
2248                 }
2249                 if (s->conversion)
2250                         cinfo.ptr = s->dma_adc.hwptr / 2;
2251                 else
2252                         cinfo.ptr = s->dma_adc.hwptr;
2253                 if (s->dma_adc.mapped)
2254                         s->dma_adc.count &= s->dma_adc.fragsize - 1;
2255                 spin_unlock_irqrestore(&s->lock, flags);
2256                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
2257
2258         case SNDCTL_DSP_GETOPTR:
2259                 if (!(file->f_mode & FMODE_WRITE))
2260                         return -EINVAL;
2261                 if(!s->dma_dac.ready && prog_dmabuf_dac(s))
2262                         return 0;
2263                 spin_lock_irqsave(&s->lock, flags);
2264                 cs4297a_update_ptr(s,CS_FALSE);
2265                 cinfo.bytes = s->dma_dac.total_bytes;
2266                 if (s->dma_dac.mapped) {
2267                         cinfo.blocks =
2268                             (cinfo.bytes >> s->dma_dac.fragshift) -
2269                             s->dma_dac.blocks;
2270                         s->dma_dac.blocks =
2271                             cinfo.bytes >> s->dma_dac.fragshift;
2272                 } else {
2273                         cinfo.blocks =
2274                             s->dma_dac.count >> s->dma_dac.fragshift;
2275                 }
2276                 cinfo.ptr = s->dma_dac.hwptr;
2277                 if (s->dma_dac.mapped)
2278                         s->dma_dac.count &= s->dma_dac.fragsize - 1;
2279                 spin_unlock_irqrestore(&s->lock, flags);
2280                 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
2281
2282         case SNDCTL_DSP_GETBLKSIZE:
2283                 if (file->f_mode & FMODE_WRITE) {
2284                         if ((val = prog_dmabuf_dac(s)))
2285                                 return val;
2286                         return put_user(s->dma_dac.fragsize, (int *) arg);
2287                 }
2288                 if ((val = prog_dmabuf_adc(s)))
2289                         return val;
2290                 if (s->conversion)
2291                         return put_user(s->dma_adc.fragsize / 2,
2292                                         (int *) arg);
2293                 else
2294                         return put_user(s->dma_adc.fragsize, (int *) arg);
2295
2296         case SNDCTL_DSP_SETFRAGMENT:
2297                 if (get_user(val, (int *) arg))
2298                         return -EFAULT;
2299                 return 0;       // Say OK, but do nothing.
2300
2301         case SNDCTL_DSP_SUBDIVIDE:
2302                 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision)
2303                     || (file->f_mode & FMODE_WRITE
2304                         && s->dma_dac.subdivision)) return -EINVAL;
2305                 if (get_user(val, (int *) arg))
2306                         return -EFAULT;
2307                 if (val != 1 && val != 2 && val != 4)
2308                         return -EINVAL;
2309                 if (file->f_mode & FMODE_READ)
2310                         s->dma_adc.subdivision = val;
2311                 else if (file->f_mode & FMODE_WRITE)
2312                         s->dma_dac.subdivision = val;
2313                 return 0;
2314
2315         case SOUND_PCM_READ_RATE:
2316                 if (file->f_mode & FMODE_READ)
2317                         return put_user(s->prop_adc.rate, (int *) arg);
2318                 else if (file->f_mode & FMODE_WRITE)
2319                         return put_user(s->prop_dac.rate, (int *) arg);
2320
2321         case SOUND_PCM_READ_CHANNELS:
2322                 if (file->f_mode & FMODE_READ)
2323                         return put_user(s->prop_adc.channels, (int *) arg);
2324                 else if (file->f_mode & FMODE_WRITE)
2325                         return put_user(s->prop_dac.channels, (int *) arg);
2326
2327         case SOUND_PCM_READ_BITS:
2328                 if (file->f_mode & FMODE_READ)
2329                         return
2330                             put_user(
2331                                      (s->prop_adc.
2332                                       fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
2333                                      (int *) arg);
2334                 else if (file->f_mode & FMODE_WRITE)
2335                         return
2336                             put_user(
2337                                      (s->prop_dac.
2338                                       fmt & (AFMT_S8 | AFMT_U8)) ? 8 : 16,
2339                                      (int *) arg);
2340
2341         case SOUND_PCM_WRITE_FILTER:
2342         case SNDCTL_DSP_SETSYNCRO:
2343         case SOUND_PCM_READ_FILTER:
2344                 return -EINVAL;
2345         }
2346         return mixer_ioctl(s, cmd, arg);
2347 }
2348
2349 static long cs4297a_unlocked_ioctl(struct file *file, u_int cmd, u_long arg)
2350 {
2351         int ret;
2352
2353         mutex_lock(&swarm_cs4297a_mutex);
2354         ret = cs4297a_ioctl(file, cmd, arg);
2355         mutex_unlock(&swarm_cs4297a_mutex);
2356
2357         return ret;
2358 }
2359
2360 static int cs4297a_release(struct inode *inode, struct file *file)
2361 {
2362         struct cs4297a_state *s =
2363             (struct cs4297a_state *) file->private_data;
2364
2365         CS_DBGOUT(CS_FUNCTION | CS_RELEASE, 2, printk(KERN_INFO
2366                  "cs4297a: cs4297a_release(): inode=0x%.8x file=0x%.8x f_mode=0x%x\n",
2367                          (unsigned) inode, (unsigned) file, file->f_mode));
2368         VALIDATE_STATE(s);
2369
2370         if (file->f_mode & FMODE_WRITE) {
2371                 drain_dac(s, file->f_flags & O_NONBLOCK);
2372                 mutex_lock(&s->open_sem_dac);
2373                 stop_dac(s);
2374                 dealloc_dmabuf(s, &s->dma_dac);
2375                 s->open_mode &= ~FMODE_WRITE;
2376                 mutex_unlock(&s->open_sem_dac);
2377                 wake_up(&s->open_wait_dac);
2378         }
2379         if (file->f_mode & FMODE_READ) {
2380                 drain_adc(s, file->f_flags & O_NONBLOCK);
2381                 mutex_lock(&s->open_sem_adc);
2382                 stop_adc(s);
2383                 dealloc_dmabuf(s, &s->dma_adc);
2384                 s->open_mode &= ~FMODE_READ;
2385                 mutex_unlock(&s->open_sem_adc);
2386                 wake_up(&s->open_wait_adc);
2387         }
2388         return 0;
2389 }
2390
2391 static int cs4297a_locked_open(struct inode *inode, struct file *file)
2392 {
2393         int minor = iminor(inode);
2394         struct cs4297a_state *s=NULL;
2395         struct list_head *entry;
2396
2397         CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
2398                 "cs4297a: cs4297a_open(): inode=0x%.8x file=0x%.8x f_mode=0x%x\n",
2399                         (unsigned) inode, (unsigned) file, file->f_mode));
2400         CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
2401                 "cs4297a: status = %08x\n", (int)__raw_readq(SS_CSR(R_SER_STATUS_DEBUG))));
2402
2403         list_for_each(entry, &cs4297a_devs)
2404         {
2405                 s = list_entry(entry, struct cs4297a_state, list);
2406
2407                 if (!((s->dev_audio ^ minor) & ~0xf))
2408                         break;
2409         }
2410         if (entry == &cs4297a_devs)
2411                 return -ENODEV;
2412         if (!s) {
2413                 CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2, printk(KERN_INFO
2414                         "cs4297a: cs4297a_open(): Error - unable to find audio state struct\n"));
2415                 return -ENODEV;
2416         }
2417         VALIDATE_STATE(s);
2418         file->private_data = s;
2419
2420         // wait for device to become free 
2421         if (!(file->f_mode & (FMODE_WRITE | FMODE_READ))) {
2422                 CS_DBGOUT(CS_FUNCTION | CS_OPEN | CS_ERROR, 2, printk(KERN_INFO
2423                          "cs4297a: cs4297a_open(): Error - must open READ and/or WRITE\n"));
2424                 return -ENODEV;
2425         }
2426         if (file->f_mode & FMODE_WRITE) {
2427                 if (__raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_TX)) != 0) {
2428                         printk(KERN_ERR "cs4297a: TX pipe needs to drain\n");
2429                         while (__raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_TX)))
2430                                 ;
2431                 }
2432           
2433                 mutex_lock(&s->open_sem_dac);
2434                 while (s->open_mode & FMODE_WRITE) {
2435                         if (file->f_flags & O_NONBLOCK) {
2436                                 mutex_unlock(&s->open_sem_dac);
2437                                 return -EBUSY;
2438                         }
2439                         mutex_unlock(&s->open_sem_dac);
2440                         interruptible_sleep_on(&s->open_wait_dac);
2441
2442                         if (signal_pending(current)) {
2443                                 printk("open - sig pending\n");
2444                                 return -ERESTARTSYS;
2445                         }
2446                         mutex_lock(&s->open_sem_dac);
2447                 }
2448         }
2449         if (file->f_mode & FMODE_READ) {
2450                 mutex_lock(&s->open_sem_adc);
2451                 while (s->open_mode & FMODE_READ) {
2452                         if (file->f_flags & O_NONBLOCK) {
2453                                 mutex_unlock(&s->open_sem_adc);
2454                                 return -EBUSY;
2455                         }
2456                         mutex_unlock(&s->open_sem_adc);
2457                         interruptible_sleep_on(&s->open_wait_adc);
2458
2459                         if (signal_pending(current)) {
2460                                 printk("open - sig pending\n");
2461                                 return -ERESTARTSYS;
2462                         }
2463                         mutex_lock(&s->open_sem_adc);
2464                 }
2465         }
2466         s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
2467         if (file->f_mode & FMODE_READ) {
2468                 s->prop_adc.fmt = AFMT_S16_BE;
2469                 s->prop_adc.fmt_original = s->prop_adc.fmt;
2470                 s->prop_adc.channels = 2;
2471                 s->prop_adc.rate = 48000;
2472                 s->conversion = 0;
2473                 s->ena &= ~FMODE_READ;
2474                 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
2475                     s->dma_adc.subdivision = 0;
2476                 mutex_unlock(&s->open_sem_adc);
2477
2478                 if (prog_dmabuf_adc(s)) {
2479                         CS_DBGOUT(CS_OPEN | CS_ERROR, 2, printk(KERN_ERR
2480                                 "cs4297a: adc Program dmabufs failed.\n"));
2481                         cs4297a_release(inode, file);
2482                         return -ENOMEM;
2483                 }
2484         }
2485         if (file->f_mode & FMODE_WRITE) {
2486                 s->prop_dac.fmt = AFMT_S16_BE;
2487                 s->prop_dac.fmt_original = s->prop_dac.fmt;
2488                 s->prop_dac.channels = 2;
2489                 s->prop_dac.rate = 48000;
2490                 s->conversion = 0;
2491                 s->ena &= ~FMODE_WRITE;
2492                 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
2493                     s->dma_dac.subdivision = 0;
2494                 mutex_unlock(&s->open_sem_dac);
2495
2496                 if (prog_dmabuf_dac(s)) {
2497                         CS_DBGOUT(CS_OPEN | CS_ERROR, 2, printk(KERN_ERR
2498                                 "cs4297a: dac Program dmabufs failed.\n"));
2499                         cs4297a_release(inode, file);
2500                         return -ENOMEM;
2501                 }
2502         }
2503         CS_DBGOUT(CS_FUNCTION | CS_OPEN, 2,
2504                   printk(KERN_INFO "cs4297a: cs4297a_open()- 0\n"));
2505         return nonseekable_open(inode, file);
2506 }
2507
2508 static int cs4297a_open(struct inode *inode, struct file *file)
2509 {
2510         int ret;
2511
2512         mutex_lock(&swarm_cs4297a_mutex);
2513         ret = cs4297a_open(inode, file);
2514         mutex_unlock(&swarm_cs4297a_mutex);
2515
2516         return ret;
2517 }
2518
2519 // ******************************************************************************************
2520 //   Wave (audio) file operations struct.
2521 // ******************************************************************************************
2522 static const struct file_operations cs4297a_audio_fops = {
2523         .owner          = THIS_MODULE,
2524         .llseek         = no_llseek,
2525         .read           = cs4297a_read,
2526         .write          = cs4297a_write,
2527         .poll           = cs4297a_poll,
2528         .unlocked_ioctl = cs4297a_unlocked_ioctl,
2529         .mmap           = cs4297a_mmap,
2530         .open           = cs4297a_open,
2531         .release        = cs4297a_release,
2532 };
2533
2534 static void cs4297a_interrupt(int irq, void *dev_id)
2535 {
2536         struct cs4297a_state *s = (struct cs4297a_state *) dev_id;
2537         u32 status;
2538
2539         status = __raw_readq(SS_CSR(R_SER_STATUS_DEBUG));
2540
2541         CS_DBGOUT(CS_INTERRUPT, 6, printk(KERN_INFO
2542                  "cs4297a: cs4297a_interrupt() HISR=0x%.8x\n", status));
2543
2544 #if 0
2545         /* XXXKW what check *should* be done here? */
2546         if (!(status & (M_SYNCSER_RX_EOP_COUNT | M_SYNCSER_RX_OVERRUN | M_SYNCSER_RX_SYNC_ERR))) {
2547                 status = __raw_readq(SS_CSR(R_SER_STATUS));
2548                 printk(KERN_ERR "cs4297a: unexpected interrupt (status %08x)\n", status);
2549                 return;
2550         }
2551 #endif
2552
2553         if (status & M_SYNCSER_RX_SYNC_ERR) {
2554                 status = __raw_readq(SS_CSR(R_SER_STATUS));
2555                 printk(KERN_ERR "cs4297a: rx sync error (status %08x)\n", status);
2556                 return;
2557         }
2558
2559         if (status & M_SYNCSER_RX_OVERRUN) {
2560                 int newptr, i;
2561                 s->stats.rx_ovrrn++;
2562                 printk(KERN_ERR "cs4297a: receive FIFO overrun\n");
2563
2564                 /* Fix things up: get the receive descriptor pool
2565                    clean and give them back to the hardware */
2566                 while (__raw_readq(SS_CSR(R_SER_DMA_DSCR_COUNT_RX)))
2567                         ;
2568                 newptr = (unsigned) (((__raw_readq(SS_CSR(R_SER_DMA_CUR_DSCR_ADDR_RX)) & M_DMA_CURDSCR_ADDR) -
2569                                      s->dma_adc.descrtab_phys) / sizeof(serdma_descr_t));
2570                 for (i=0; i<DMA_DESCR; i++) {
2571                         s->dma_adc.descrtab[i].descr_a &= ~M_DMA_SERRX_SOP;
2572                 }
2573                 s->dma_adc.swptr = s->dma_adc.hwptr = newptr;
2574                 s->dma_adc.count = 0;
2575                 s->dma_adc.sb_swptr = s->dma_adc.sb_hwptr = s->dma_adc.sample_buf;
2576                 __raw_writeq(DMA_DESCR, SS_CSR(R_SER_DMA_DSCR_COUNT_RX));
2577         }
2578
2579         spin_lock(&s->lock);
2580         cs4297a_update_ptr(s,CS_TRUE);
2581         spin_unlock(&s->lock);
2582
2583         CS_DBGOUT(CS_INTERRUPT, 6, printk(KERN_INFO
2584                   "cs4297a: cs4297a_interrupt()-\n"));
2585 }
2586
2587 #if 0
2588 static struct initvol {
2589         int mixch;
2590         int vol;
2591 } initvol[] __initdata = {
2592
2593         {SOUND_MIXER_WRITE_VOLUME, 0x4040},
2594         {SOUND_MIXER_WRITE_PCM, 0x4040},
2595         {SOUND_MIXER_WRITE_SYNTH, 0x4040},
2596         {SOUND_MIXER_WRITE_CD, 0x4040},
2597         {SOUND_MIXER_WRITE_LINE, 0x4040},
2598         {SOUND_MIXER_WRITE_LINE1, 0x4040},
2599         {SOUND_MIXER_WRITE_RECLEV, 0x0000},
2600         {SOUND_MIXER_WRITE_SPEAKER, 0x4040},
2601         {SOUND_MIXER_WRITE_MIC, 0x0000}
2602 };
2603 #endif
2604
2605 static int __init cs4297a_init(void)
2606 {
2607         struct cs4297a_state *s;
2608         u32 pwr, id;
2609         mm_segment_t fs;
2610         int rval;
2611 #ifndef CONFIG_BCM_CS4297A_CSWARM
2612         u64 cfg;
2613         int mdio_val;
2614 #endif
2615
2616         CS_DBGOUT(CS_INIT | CS_FUNCTION, 2, printk(KERN_INFO 
2617                 "cs4297a: cs4297a_init_module()+ \n"));
2618
2619 #ifndef CONFIG_BCM_CS4297A_CSWARM
2620         mdio_val = __raw_readq(KSEG1 + A_MAC_REGISTER(2, R_MAC_MDIO)) &
2621                 (M_MAC_MDIO_DIR|M_MAC_MDIO_OUT);
2622
2623         /* Check syscfg for synchronous serial on port 1 */
2624         cfg = __raw_readq(KSEG1 + A_SCD_SYSTEM_CFG);
2625         if (!(cfg & M_SYS_SER1_ENABLE)) {
2626                 __raw_writeq(cfg | M_SYS_SER1_ENABLE, KSEG1+A_SCD_SYSTEM_CFG);
2627                 cfg = __raw_readq(KSEG1 + A_SCD_SYSTEM_CFG);
2628                 if (!(cfg & M_SYS_SER1_ENABLE)) {
2629                   printk(KERN_INFO "cs4297a: serial port 1 not configured for synchronous operation\n");
2630                   return -1;
2631                 }
2632
2633                 printk(KERN_INFO "cs4297a: serial port 1 switching to synchronous operation\n");
2634                 
2635                 /* Force the codec (on SWARM) to reset by clearing
2636                    GENO, preserving MDIO (no effect on CSWARM) */
2637                 __raw_writeq(mdio_val, KSEG1+A_MAC_REGISTER(2, R_MAC_MDIO));
2638                 udelay(10);
2639         }
2640
2641         /* Now set GENO */
2642         __raw_writeq(mdio_val | M_MAC_GENC, KSEG1+A_MAC_REGISTER(2, R_MAC_MDIO));
2643         /* Give the codec some time to finish resetting (start the bit clock) */
2644         udelay(100);
2645 #endif
2646
2647         if (!(s = kzalloc(sizeof(struct cs4297a_state), GFP_KERNEL))) {
2648                 CS_DBGOUT(CS_ERROR, 1, printk(KERN_ERR
2649                       "cs4297a: probe() no memory for state struct.\n"));
2650                 return -1;
2651         }
2652         s->magic = CS4297a_MAGIC;
2653         init_waitqueue_head(&s->dma_adc.wait);
2654         init_waitqueue_head(&s->dma_dac.wait);
2655         init_waitqueue_head(&s->dma_adc.reg_wait);
2656         init_waitqueue_head(&s->dma_dac.reg_wait);
2657         init_waitqueue_head(&s->open_wait);
2658         init_waitqueue_head(&s->open_wait_adc);
2659         init_waitqueue_head(&s->open_wait_dac);
2660         mutex_init(&s->open_sem_adc);
2661         mutex_init(&s->open_sem_dac);
2662         spin_lock_init(&s->lock);
2663
2664         s->irq = K_INT_SER_1;
2665
2666         if (request_irq
2667             (s->irq, cs4297a_interrupt, 0, "Crystal CS4297a", s)) {
2668                 CS_DBGOUT(CS_INIT | CS_ERROR, 1,
2669                           printk(KERN_ERR "cs4297a: irq %u in use\n", s->irq));
2670                 goto err_irq;
2671         }
2672         if ((s->dev_audio = register_sound_dsp(&cs4297a_audio_fops, -1)) <
2673             0) {
2674                 CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
2675                          "cs4297a: probe() register_sound_dsp() failed.\n"));
2676                 goto err_dev1;
2677         }
2678         if ((s->dev_mixer = register_sound_mixer(&cs4297a_mixer_fops, -1)) <
2679             0) {
2680                 CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
2681                          "cs4297a: probe() register_sound_mixer() failed.\n"));
2682                 goto err_dev2;
2683         }
2684
2685         if (ser_init(s) || dma_init(s)) {
2686                 CS_DBGOUT(CS_INIT | CS_ERROR, 1, printk(KERN_ERR
2687                          "cs4297a: ser_init failed.\n"));
2688                 goto err_dev3;
2689         }
2690
2691         do {
2692                 udelay(4000);
2693                 rval = cs4297a_read_ac97(s, AC97_POWER_CONTROL, &pwr);
2694         } while (!rval && (pwr != 0xf));
2695
2696         if (!rval) {
2697                 char *sb1250_duart_present;
2698
2699                 fs = get_fs();
2700                 set_fs(KERNEL_DS);
2701 #if 0
2702                 val = SOUND_MASK_LINE;
2703                 mixer_ioctl(s, SOUND_MIXER_WRITE_RECSRC, (unsigned long) &val);
2704                 for (i = 0; i < ARRAY_SIZE(initvol); i++) {
2705                         val = initvol[i].vol;
2706                         mixer_ioctl(s, initvol[i].mixch, (unsigned long) &val);
2707                 }
2708 //                cs4297a_write_ac97(s, 0x18, 0x0808);
2709 #else
2710                 //                cs4297a_write_ac97(s, 0x5e, 0x180);
2711                 cs4297a_write_ac97(s, 0x02, 0x0808);
2712                 cs4297a_write_ac97(s, 0x18, 0x0808);
2713 #endif
2714                 set_fs(fs);
2715
2716                 list_add(&s->list, &cs4297a_devs);
2717
2718                 cs4297a_read_ac97(s, AC97_VENDOR_ID1, &id);
2719
2720                 sb1250_duart_present = symbol_get(sb1250_duart_present);
2721                 if (sb1250_duart_present)
2722                         sb1250_duart_present[1] = 0;
2723
2724                 printk(KERN_INFO "cs4297a: initialized (vendor id = %x)\n", id);
2725
2726                 CS_DBGOUT(CS_INIT | CS_FUNCTION, 2,
2727                           printk(KERN_INFO "cs4297a: cs4297a_init_module()-\n"));
2728                 
2729                 return 0;
2730         }
2731
2732  err_dev3:
2733         unregister_sound_mixer(s->dev_mixer);
2734  err_dev2:
2735         unregister_sound_dsp(s->dev_audio);
2736  err_dev1:
2737         free_irq(s->irq, s);
2738  err_irq:
2739         kfree(s);
2740
2741         printk(KERN_INFO "cs4297a: initialization failed\n");
2742
2743         return -1;
2744 }
2745
2746 static void __exit cs4297a_cleanup(void)
2747 {
2748         /*
2749           XXXKW 
2750            disable_irq, free_irq
2751            drain DMA queue
2752            disable DMA
2753            disable TX/RX
2754            free memory
2755         */
2756         CS_DBGOUT(CS_INIT | CS_FUNCTION, 2,
2757                   printk(KERN_INFO "cs4297a: cleanup_cs4297a() finished\n"));
2758 }
2759
2760 // --------------------------------------------------------------------- 
2761
2762 MODULE_AUTHOR("Kip Walker, Broadcom Corp.");
2763 MODULE_DESCRIPTION("Cirrus Logic CS4297a Driver for Broadcom SWARM board");
2764
2765 // --------------------------------------------------------------------- 
2766
2767 module_init(cs4297a_init);
2768 module_exit(cs4297a_cleanup);