[ALSA] sound: fix ad1889 section mismatch
[linux-2.6.git] / sound / pci / ad1889.c
1 /* Analog Devices 1889 audio driver
2  *
3  * This is a driver for the AD1889 PCI audio chipset found
4  * on the HP PA-RISC [BCJ]-xxx0 workstations.
5  *
6  * Copyright (C) 2004-2005, Kyle McMartin <kyle@parisc-linux.org>
7  * Copyright (C) 2005, Thibaut Varene <varenet@parisc-linux.org>
8  *   Based on the OSS AD1889 driver by Randolph Chung <tausq@debian.org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License, version 2, as
12  * published by the Free Software Foundation.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  *
23  * TODO:
24  *      Do we need to take care of CCS register?
25  *      Maybe we could use finer grained locking (separate locks for pb/cap)?
26  * Wishlist:
27  *      Control Interface (mixer) support
28  *      Better AC97 support (VSR...)?
29  *      PM support
30  *      MIDI support
31  *      Game Port support
32  *      SG DMA support (this will need *alot* of work)
33  */
34
35 #include <linux/init.h>
36 #include <linux/pci.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/slab.h>
39 #include <linux/interrupt.h>
40 #include <linux/compiler.h>
41 #include <linux/delay.h>
42
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/initval.h>
46 #include <sound/ac97_codec.h>
47
48 #include <asm/io.h>
49
50 #include "ad1889.h"
51 #include "ac97/ac97_id.h"
52
53 #define AD1889_DRVVER   "Version: 1.7"
54
55 MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
56 MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
57 MODULE_LICENSE("GPL");
58 MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");
59
60 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
61 module_param_array(index, int, NULL, 0444);
62 MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");
63
64 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
65 module_param_array(id, charp, NULL, 0444);
66 MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");
67
68 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
69 module_param_array(enable, bool, NULL, 0444);
70 MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");
71
72 static char *ac97_quirk[SNDRV_CARDS];
73 module_param_array(ac97_quirk, charp, NULL, 0444);
74 MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
75
76 #define DEVNAME "ad1889"
77 #define PFX     DEVNAME ": "
78
79 /* let's use the global sound debug interfaces */
80 #define ad1889_debug(fmt, arg...) snd_printd(KERN_DEBUG fmt, ## arg)
81
82 /* keep track of some hw registers */
83 struct ad1889_register_state {
84         u16 reg;        /* reg setup */
85         u32 addr;       /* dma base address */
86         unsigned long size;     /* DMA buffer size */
87 };
88
89 struct snd_ad1889 {
90         struct snd_card *card;
91         struct pci_dev *pci;
92
93         int irq;
94         unsigned long bar;
95         void __iomem *iobase;
96
97         struct snd_ac97 *ac97;
98         struct snd_ac97_bus *ac97_bus;
99         struct snd_pcm *pcm;
100         struct snd_info_entry *proc;
101
102         struct snd_pcm_substream *psubs;
103         struct snd_pcm_substream *csubs;
104
105         /* playback register state */
106         struct ad1889_register_state wave;
107         struct ad1889_register_state ramc;
108
109         spinlock_t lock;
110 };
111
112 static inline u16
113 ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
114 {
115         return readw(chip->iobase + reg);
116 }
117
118 static inline void
119 ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
120 {
121         writew(val, chip->iobase + reg);
122 }
123
124 static inline u32
125 ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
126 {
127         return readl(chip->iobase + reg);
128 }
129
130 static inline void
131 ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
132 {
133         writel(val, chip->iobase + reg);
134 }
135
136 static inline void
137 ad1889_unmute(struct snd_ad1889 *chip)
138 {
139         u16 st;
140         st = ad1889_readw(chip, AD_DS_WADA) & 
141                 ~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
142         ad1889_writew(chip, AD_DS_WADA, st);
143         ad1889_readw(chip, AD_DS_WADA);
144 }
145
146 static inline void
147 ad1889_mute(struct snd_ad1889 *chip)
148 {
149         u16 st;
150         st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
151         ad1889_writew(chip, AD_DS_WADA, st);
152         ad1889_readw(chip, AD_DS_WADA);
153 }
154
155 static inline void
156 ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
157 {
158         ad1889_writel(chip, AD_DMA_ADCBA, address);
159         ad1889_writel(chip, AD_DMA_ADCCA, address);
160 }
161
162 static inline void
163 ad1889_load_adc_buffer_count(struct snd_ad1889 *chip, u32 count)
164 {
165         ad1889_writel(chip, AD_DMA_ADCBC, count);
166         ad1889_writel(chip, AD_DMA_ADCCC, count);
167 }
168
169 static inline void
170 ad1889_load_adc_interrupt_count(struct snd_ad1889 *chip, u32 count)
171 {
172         ad1889_writel(chip, AD_DMA_ADCIB, count);
173         ad1889_writel(chip, AD_DMA_ADCIC, count);
174 }
175
176 static inline void
177 ad1889_load_wave_buffer_address(struct snd_ad1889 *chip, u32 address)
178 {
179         ad1889_writel(chip, AD_DMA_WAVBA, address);
180         ad1889_writel(chip, AD_DMA_WAVCA, address);
181 }
182
183 static inline void
184 ad1889_load_wave_buffer_count(struct snd_ad1889 *chip, u32 count)
185 {
186         ad1889_writel(chip, AD_DMA_WAVBC, count);
187         ad1889_writel(chip, AD_DMA_WAVCC, count);
188 }
189
190 static inline void
191 ad1889_load_wave_interrupt_count(struct snd_ad1889 *chip, u32 count)
192 {
193         ad1889_writel(chip, AD_DMA_WAVIB, count);
194         ad1889_writel(chip, AD_DMA_WAVIC, count);
195 }
196
197 static void
198 ad1889_channel_reset(struct snd_ad1889 *chip, unsigned int channel)
199 {
200         u16 reg;
201         
202         if (channel & AD_CHAN_WAV) {
203                 /* Disable wave channel */
204                 reg = ad1889_readw(chip, AD_DS_WSMC) & ~AD_DS_WSMC_WAEN;
205                 ad1889_writew(chip, AD_DS_WSMC, reg);
206                 chip->wave.reg = reg;
207                 
208                 /* disable IRQs */
209                 reg = ad1889_readw(chip, AD_DMA_WAV);
210                 reg &= AD_DMA_IM_DIS;
211                 reg &= ~AD_DMA_LOOP;
212                 ad1889_writew(chip, AD_DMA_WAV, reg);
213
214                 /* clear IRQ and address counters and pointers */
215                 ad1889_load_wave_buffer_address(chip, 0x0);
216                 ad1889_load_wave_buffer_count(chip, 0x0);
217                 ad1889_load_wave_interrupt_count(chip, 0x0);
218
219                 /* flush */
220                 ad1889_readw(chip, AD_DMA_WAV);
221         }
222         
223         if (channel & AD_CHAN_ADC) {
224                 /* Disable ADC channel */
225                 reg = ad1889_readw(chip, AD_DS_RAMC) & ~AD_DS_RAMC_ADEN;
226                 ad1889_writew(chip, AD_DS_RAMC, reg);
227                 chip->ramc.reg = reg;
228
229                 reg = ad1889_readw(chip, AD_DMA_ADC);
230                 reg &= AD_DMA_IM_DIS;
231                 reg &= ~AD_DMA_LOOP;
232                 ad1889_writew(chip, AD_DMA_ADC, reg);
233         
234                 ad1889_load_adc_buffer_address(chip, 0x0);
235                 ad1889_load_adc_buffer_count(chip, 0x0);
236                 ad1889_load_adc_interrupt_count(chip, 0x0);
237
238                 /* flush */
239                 ad1889_readw(chip, AD_DMA_ADC);
240         }
241 }
242
243 static u16
244 snd_ad1889_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
245 {
246         struct snd_ad1889 *chip = ac97->private_data;
247         return ad1889_readw(chip, AD_AC97_BASE + reg);
248 }
249
250 static void
251 snd_ad1889_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
252 {
253         struct snd_ad1889 *chip = ac97->private_data;
254         ad1889_writew(chip, AD_AC97_BASE + reg, val);
255 }
256
257 static int
258 snd_ad1889_ac97_ready(struct snd_ad1889 *chip)
259 {
260         int retry = 400; /* average needs 352 msec */
261         
262         while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY) 
263                         && --retry)
264                 mdelay(1);
265         if (!retry) {
266                 snd_printk(KERN_ERR PFX "[%s] Link is not ready.\n",
267                        __FUNCTION__);
268                 return -EIO;
269         }
270         ad1889_debug("[%s] ready after %d ms\n", __FUNCTION__, 400 - retry);
271
272         return 0;
273 }
274
275 static int 
276 snd_ad1889_hw_params(struct snd_pcm_substream *substream,
277                         struct snd_pcm_hw_params *hw_params)
278 {
279         return snd_pcm_lib_malloc_pages(substream, 
280                                         params_buffer_bytes(hw_params));
281 }
282
283 static int
284 snd_ad1889_hw_free(struct snd_pcm_substream *substream)
285 {
286         return snd_pcm_lib_free_pages(substream);
287 }
288
289 static struct snd_pcm_hardware snd_ad1889_playback_hw = {
290         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
291                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
292         .formats = SNDRV_PCM_FMTBIT_S16_LE,
293         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
294         .rate_min = 8000,       /* docs say 7000, but we're lazy */
295         .rate_max = 48000,
296         .channels_min = 1,
297         .channels_max = 2,
298         .buffer_bytes_max = BUFFER_BYTES_MAX,
299         .period_bytes_min = PERIOD_BYTES_MIN,
300         .period_bytes_max = PERIOD_BYTES_MAX,
301         .periods_min = PERIODS_MIN,
302         .periods_max = PERIODS_MAX,
303         /*.fifo_size = 0,*/
304 };
305
306 static struct snd_pcm_hardware snd_ad1889_capture_hw = {
307         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
308                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
309         .formats = SNDRV_PCM_FMTBIT_S16_LE,
310         .rates = SNDRV_PCM_RATE_48000,
311         .rate_min = 48000,      /* docs say we could to VSR, but we're lazy */
312         .rate_max = 48000,
313         .channels_min = 1,
314         .channels_max = 2,
315         .buffer_bytes_max = BUFFER_BYTES_MAX,
316         .period_bytes_min = PERIOD_BYTES_MIN,
317         .period_bytes_max = PERIOD_BYTES_MAX,
318         .periods_min = PERIODS_MIN,
319         .periods_max = PERIODS_MAX,
320         /*.fifo_size = 0,*/
321 };
322
323 static int
324 snd_ad1889_playback_open(struct snd_pcm_substream *ss)
325 {
326         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
327         struct snd_pcm_runtime *rt = ss->runtime;
328
329         chip->psubs = ss;
330         rt->hw = snd_ad1889_playback_hw;
331
332         return 0;
333 }
334
335 static int
336 snd_ad1889_capture_open(struct snd_pcm_substream *ss)
337 {
338         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
339         struct snd_pcm_runtime *rt = ss->runtime;
340
341         chip->csubs = ss;
342         rt->hw = snd_ad1889_capture_hw;
343
344         return 0;
345 }
346
347 static int
348 snd_ad1889_playback_close(struct snd_pcm_substream *ss)
349 {
350         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
351         chip->psubs = NULL;
352         return 0;
353 }
354
355 static int
356 snd_ad1889_capture_close(struct snd_pcm_substream *ss)
357 {
358         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
359         chip->csubs = NULL;
360         return 0;
361 }
362
363 static int
364 snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
365 {
366         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
367         struct snd_pcm_runtime *rt = ss->runtime;
368         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
369         unsigned int count = snd_pcm_lib_period_bytes(ss);
370         u16 reg;
371
372         ad1889_channel_reset(chip, AD_CHAN_WAV);
373
374         reg = ad1889_readw(chip, AD_DS_WSMC);
375         
376         /* Mask out 16-bit / Stereo */
377         reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
378
379         if (snd_pcm_format_width(rt->format) == 16)
380                 reg |= AD_DS_WSMC_WA16;
381
382         if (rt->channels > 1)
383                 reg |= AD_DS_WSMC_WAST;
384
385         /* let's make sure we don't clobber ourselves */
386         spin_lock_irq(&chip->lock);
387         
388         chip->wave.size = size;
389         chip->wave.reg = reg;
390         chip->wave.addr = rt->dma_addr;
391
392         ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
393         
394         /* Set sample rates on the codec */
395         ad1889_writew(chip, AD_DS_WAS, rt->rate);
396
397         /* Set up DMA */
398         ad1889_load_wave_buffer_address(chip, chip->wave.addr);
399         ad1889_load_wave_buffer_count(chip, size);
400         ad1889_load_wave_interrupt_count(chip, count);
401
402         /* writes flush */
403         ad1889_readw(chip, AD_DS_WSMC);
404         
405         spin_unlock_irq(&chip->lock);
406         
407         ad1889_debug("prepare playback: addr = 0x%x, count = %u, "
408                         "size = %u, reg = 0x%x, rate = %u\n", chip->wave.addr,
409                         count, size, reg, rt->rate);
410         return 0;
411 }
412
413 static int
414 snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
415 {
416         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
417         struct snd_pcm_runtime *rt = ss->runtime;
418         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
419         unsigned int count = snd_pcm_lib_period_bytes(ss);
420         u16 reg;
421
422         ad1889_channel_reset(chip, AD_CHAN_ADC);
423         
424         reg = ad1889_readw(chip, AD_DS_RAMC);
425
426         /* Mask out 16-bit / Stereo */
427         reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
428
429         if (snd_pcm_format_width(rt->format) == 16)
430                 reg |= AD_DS_RAMC_AD16;
431
432         if (rt->channels > 1)
433                 reg |= AD_DS_RAMC_ADST;
434
435         /* let's make sure we don't clobber ourselves */
436         spin_lock_irq(&chip->lock);
437         
438         chip->ramc.size = size;
439         chip->ramc.reg = reg;
440         chip->ramc.addr = rt->dma_addr;
441
442         ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
443
444         /* Set up DMA */
445         ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
446         ad1889_load_adc_buffer_count(chip, size);
447         ad1889_load_adc_interrupt_count(chip, count);
448
449         /* writes flush */
450         ad1889_readw(chip, AD_DS_RAMC);
451         
452         spin_unlock_irq(&chip->lock);
453         
454         ad1889_debug("prepare capture: addr = 0x%x, count = %u, "
455                         "size = %u, reg = 0x%x, rate = %u\n", chip->ramc.addr,
456                         count, size, reg, rt->rate);
457         return 0;
458 }
459
460 /* this is called in atomic context with IRQ disabled.
461    Must be as fast as possible and not sleep.
462    DMA should be *triggered* by this call.
463    The WSMC "WAEN" bit triggers DMA Wave On/Off */
464 static int
465 snd_ad1889_playback_trigger(struct snd_pcm_substream *ss, int cmd)
466 {
467         u16 wsmc;
468         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
469         
470         wsmc = ad1889_readw(chip, AD_DS_WSMC);
471
472         switch (cmd) {
473         case SNDRV_PCM_TRIGGER_START:
474                 /* enable DMA loop & interrupts */
475                 ad1889_writew(chip, AD_DMA_WAV, AD_DMA_LOOP | AD_DMA_IM_CNT);
476                 wsmc |= AD_DS_WSMC_WAEN;
477                 /* 1 to clear CHSS bit */
478                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_WAVS);
479                 ad1889_unmute(chip);
480                 break;
481         case SNDRV_PCM_TRIGGER_STOP:
482                 ad1889_mute(chip);
483                 wsmc &= ~AD_DS_WSMC_WAEN;
484                 break;
485         default:
486                 snd_BUG();
487                 return -EINVAL;
488         }
489         
490         chip->wave.reg = wsmc;
491         ad1889_writew(chip, AD_DS_WSMC, wsmc);  
492         ad1889_readw(chip, AD_DS_WSMC); /* flush */
493
494         /* reset the chip when STOP - will disable IRQs */
495         if (cmd == SNDRV_PCM_TRIGGER_STOP)
496                 ad1889_channel_reset(chip, AD_CHAN_WAV);
497
498         return 0;
499 }
500
501 /* this is called in atomic context with IRQ disabled.
502    Must be as fast as possible and not sleep.
503    DMA should be *triggered* by this call.
504    The RAMC "ADEN" bit triggers DMA ADC On/Off */
505 static int
506 snd_ad1889_capture_trigger(struct snd_pcm_substream *ss, int cmd)
507 {
508         u16 ramc;
509         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
510
511         ramc = ad1889_readw(chip, AD_DS_RAMC);
512         
513         switch (cmd) {
514         case SNDRV_PCM_TRIGGER_START:
515                 /* enable DMA loop & interrupts */
516                 ad1889_writew(chip, AD_DMA_ADC, AD_DMA_LOOP | AD_DMA_IM_CNT);
517                 ramc |= AD_DS_RAMC_ADEN;
518                 /* 1 to clear CHSS bit */
519                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_ADCS);
520                 break;
521         case SNDRV_PCM_TRIGGER_STOP:
522                 ramc &= ~AD_DS_RAMC_ADEN;
523                 break;
524         default:
525                 return -EINVAL;
526         }
527         
528         chip->ramc.reg = ramc;
529         ad1889_writew(chip, AD_DS_RAMC, ramc);  
530         ad1889_readw(chip, AD_DS_RAMC); /* flush */
531         
532         /* reset the chip when STOP - will disable IRQs */
533         if (cmd == SNDRV_PCM_TRIGGER_STOP)
534                 ad1889_channel_reset(chip, AD_CHAN_ADC);
535                 
536         return 0;
537 }
538
539 /* Called in atomic context with IRQ disabled */
540 static snd_pcm_uframes_t
541 snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
542 {
543         size_t ptr = 0;
544         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
545
546         if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
547                 return 0;
548
549         ptr = ad1889_readl(chip, AD_DMA_WAVCA);
550         ptr -= chip->wave.addr;
551         
552         snd_assert((ptr >= 0) && (ptr < chip->wave.size), return 0);
553         
554         return bytes_to_frames(ss->runtime, ptr);
555 }
556
557 /* Called in atomic context with IRQ disabled */
558 static snd_pcm_uframes_t
559 snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
560 {
561         size_t ptr = 0;
562         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
563
564         if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
565                 return 0;
566
567         ptr = ad1889_readl(chip, AD_DMA_ADCCA);
568         ptr -= chip->ramc.addr;
569
570         snd_assert((ptr >= 0) && (ptr < chip->ramc.size), return 0);
571         
572         return bytes_to_frames(ss->runtime, ptr);
573 }
574
575 static struct snd_pcm_ops snd_ad1889_playback_ops = {
576         .open = snd_ad1889_playback_open,
577         .close = snd_ad1889_playback_close,
578         .ioctl = snd_pcm_lib_ioctl,
579         .hw_params = snd_ad1889_hw_params,
580         .hw_free = snd_ad1889_hw_free,
581         .prepare = snd_ad1889_playback_prepare,
582         .trigger = snd_ad1889_playback_trigger,
583         .pointer = snd_ad1889_playback_pointer, 
584 };
585
586 static struct snd_pcm_ops snd_ad1889_capture_ops = {
587         .open = snd_ad1889_capture_open,
588         .close = snd_ad1889_capture_close,
589         .ioctl = snd_pcm_lib_ioctl,
590         .hw_params = snd_ad1889_hw_params,
591         .hw_free = snd_ad1889_hw_free,
592         .prepare = snd_ad1889_capture_prepare,
593         .trigger = snd_ad1889_capture_trigger,
594         .pointer = snd_ad1889_capture_pointer, 
595 };
596
597 static irqreturn_t
598 snd_ad1889_interrupt(int irq, void *dev_id)
599 {
600         unsigned long st;
601         struct snd_ad1889 *chip = dev_id;
602
603         st = ad1889_readl(chip, AD_DMA_DISR);
604
605         /* clear ISR */
606         ad1889_writel(chip, AD_DMA_DISR, st);
607
608         st &= AD_INTR_MASK;
609
610         if (unlikely(!st))
611                 return IRQ_NONE;
612
613         if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
614                 ad1889_debug("Unexpected master or target abort interrupt!\n");
615
616         if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
617                 snd_pcm_period_elapsed(chip->psubs);
618         if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
619                 snd_pcm_period_elapsed(chip->csubs);
620
621         return IRQ_HANDLED;
622 }
623
624 static int __devinit
625 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, struct snd_pcm **rpcm)
626 {
627         int err;
628         struct snd_pcm *pcm;
629
630         if (rpcm)
631                 *rpcm = NULL;
632
633         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
634         if (err < 0)
635                 return err;
636
637         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
638                         &snd_ad1889_playback_ops);
639         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
640                         &snd_ad1889_capture_ops);
641
642         pcm->private_data = chip;
643         pcm->info_flags = 0;
644         strcpy(pcm->name, chip->card->shortname);
645         
646         chip->pcm = pcm;
647         chip->psubs = NULL;
648         chip->csubs = NULL;
649
650         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
651                                                 snd_dma_pci_data(chip->pci),
652                                                 BUFFER_BYTES_MAX / 2,
653                                                 BUFFER_BYTES_MAX);
654
655         if (err < 0) {
656                 snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
657                 return err;
658         }
659         
660         if (rpcm)
661                 *rpcm = pcm;
662         
663         return 0;
664 }
665
666 static void
667 snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
668 {
669         struct snd_ad1889 *chip = entry->private_data;
670         u16 reg;
671         int tmp;
672
673         reg = ad1889_readw(chip, AD_DS_WSMC);
674         snd_iprintf(buffer, "Wave output: %s\n",
675                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
676         snd_iprintf(buffer, "Wave Channels: %s\n",
677                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
678         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
679                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
680         
681         /* WARQ is at offset 12 */
682         tmp = (reg & AD_DS_WSMC_WARQ) ?
683                         (((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
684         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
685         
686         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
687                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
688                                 
689         
690         snd_iprintf(buffer, "Synthesis output: %s\n",
691                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
692         
693         /* SYRQ is at offset 4 */
694         tmp = (reg & AD_DS_WSMC_SYRQ) ?
695                         (((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
696         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
697         
698         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
699                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
700
701         reg = ad1889_readw(chip, AD_DS_RAMC);
702         snd_iprintf(buffer, "ADC input: %s\n",
703                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
704         snd_iprintf(buffer, "ADC Channels: %s\n",
705                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
706         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
707                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
708         
709         /* ACRQ is at offset 4 */
710         tmp = (reg & AD_DS_RAMC_ACRQ) ?
711                         (((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
712         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
713         
714         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
715                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
716         
717         snd_iprintf(buffer, "Resampler input: %s\n",
718                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
719                         
720         /* RERQ is at offset 12 */
721         tmp = (reg & AD_DS_RAMC_RERQ) ?
722                         (((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
723         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
724         
725         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
726                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
727                                 
728         
729         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
730         suggests that LSB is -3dB, which is more coherent with the logarithmic
731         nature of the dB scale */
732         reg = ad1889_readw(chip, AD_DS_WADA);
733         snd_iprintf(buffer, "Left: %s, -%d dB\n",
734                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
735                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
736         reg = ad1889_readw(chip, AD_DS_WADA);
737         snd_iprintf(buffer, "Right: %s, -%d dB\n",
738                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
739                         ((reg & AD_DS_WADA_RWAA) >> 8) * 3);
740         
741         reg = ad1889_readw(chip, AD_DS_WAS);
742         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
743         reg = ad1889_readw(chip, AD_DS_RES);
744         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
745 }
746
747 static void __devinit
748 snd_ad1889_proc_init(struct snd_ad1889 *chip)
749 {
750         struct snd_info_entry *entry;
751
752         if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
753                 snd_info_set_text_ops(entry, chip, snd_ad1889_proc_read);
754 }
755
756 static struct ac97_quirk ac97_quirks[] = {
757         {
758                 .subvendor = 0x11d4,    /* AD */
759                 .subdevice = 0x1889,    /* AD1889 */
760                 .codec_id = AC97_ID_AD1819,
761                 .name = "AD1889",
762                 .type = AC97_TUNE_HP_ONLY
763         },
764         { } /* terminator */
765 };
766
767 static void __devinit
768 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
769 {
770         u16 reg;
771
772         reg = ad1889_readw(chip, AD_AC97_ACIC);
773         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
774         ad1889_writew(chip, AD_AC97_ACIC, reg);
775         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
776         udelay(10);
777         /* Interface Enable */
778         reg |= AD_AC97_ACIC_ACIE;
779         ad1889_writew(chip, AD_AC97_ACIC, reg);
780         
781         snd_ad1889_ac97_ready(chip);
782
783         /* Audio Stream Output | Variable Sample Rate Mode */
784         reg = ad1889_readw(chip, AD_AC97_ACIC);
785         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
786         ad1889_writew(chip, AD_AC97_ACIC, reg);
787         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
788
789 }
790
791 static void
792 snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
793 {
794         struct snd_ad1889 *chip = bus->private_data;
795         chip->ac97_bus = NULL;
796 }
797
798 static void
799 snd_ad1889_ac97_free(struct snd_ac97 *ac97)
800 {
801         struct snd_ad1889 *chip = ac97->private_data;
802         chip->ac97 = NULL;
803 }
804
805 static int __devinit
806 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
807 {
808         int err;
809         struct snd_ac97_template ac97;
810         static struct snd_ac97_bus_ops ops = {
811                 .write = snd_ad1889_ac97_write,
812                 .read = snd_ad1889_ac97_read,
813         };
814
815         /* doing that here, it works. */
816         snd_ad1889_ac97_xinit(chip);
817
818         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
819         if (err < 0)
820                 return err;
821         
822         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
823
824         memset(&ac97, 0, sizeof(ac97));
825         ac97.private_data = chip;
826         ac97.private_free = snd_ad1889_ac97_free;
827         ac97.pci = chip->pci;
828
829         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
830         if (err < 0)
831                 return err;
832                 
833         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
834         
835         return 0;
836 }
837
838 static int
839 snd_ad1889_free(struct snd_ad1889 *chip)
840 {
841         if (chip->irq < 0)
842                 goto skip_hw;
843
844         spin_lock_irq(&chip->lock);
845
846         ad1889_mute(chip);
847
848         /* Turn off interrupt on count and zero DMA registers */
849         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
850
851         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
852         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
853         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
854
855         spin_unlock_irq(&chip->lock);
856
857         synchronize_irq(chip->irq);
858         
859         if (chip->irq >= 0)
860                 free_irq(chip->irq, chip);
861
862 skip_hw:
863         if (chip->iobase)
864                 iounmap(chip->iobase);
865
866         pci_release_regions(chip->pci);
867         pci_disable_device(chip->pci);
868
869         kfree(chip);
870         return 0;
871 }
872
873 static int
874 snd_ad1889_dev_free(struct snd_device *device) 
875 {
876         struct snd_ad1889 *chip = device->device_data;
877         return snd_ad1889_free(chip);
878 }
879
880 static int __devinit
881 snd_ad1889_init(struct snd_ad1889 *chip) 
882 {
883         ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
884         ad1889_readw(chip, AD_DS_CCS);  /* flush posted write */
885
886         mdelay(10);
887
888         /* enable Master and Target abort interrupts */
889         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
890
891         return 0;
892 }
893
894 static int __devinit
895 snd_ad1889_create(struct snd_card *card,
896                   struct pci_dev *pci,
897                   struct snd_ad1889 **rchip)
898 {
899         int err;
900
901         struct snd_ad1889 *chip;
902         static struct snd_device_ops ops = {
903                 .dev_free = snd_ad1889_dev_free,
904         };
905
906         *rchip = NULL;
907
908         if ((err = pci_enable_device(pci)) < 0)
909                 return err;
910
911         /* check PCI availability (32bit DMA) */
912         if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
913             pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
914                 printk(KERN_ERR PFX "error setting 32-bit DMA mask.\n");
915                 pci_disable_device(pci);
916                 return -ENXIO;
917         }
918
919         /* allocate chip specific data with zero-filled memory */
920         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
921                 pci_disable_device(pci);
922                 return -ENOMEM;
923         }
924
925         chip->card = card;
926         card->private_data = chip;
927         chip->pci = pci;
928         chip->irq = -1;
929
930         /* (1) PCI resource allocation */
931         if ((err = pci_request_regions(pci, card->driver)) < 0)
932                 goto free_and_ret;
933
934         chip->bar = pci_resource_start(pci, 0);
935         chip->iobase = ioremap_nocache(chip->bar, pci_resource_len(pci, 0));
936         if (chip->iobase == NULL) {
937                 printk(KERN_ERR PFX "unable to reserve region.\n");
938                 err = -EBUSY;
939                 goto free_and_ret;
940         }
941         
942         pci_set_master(pci);
943
944         spin_lock_init(&chip->lock);    /* only now can we call ad1889_free */
945
946         if (request_irq(pci->irq, snd_ad1889_interrupt,
947                         IRQF_SHARED, card->driver, chip)) {
948                 printk(KERN_ERR PFX "cannot obtain IRQ %d\n", pci->irq);
949                 snd_ad1889_free(chip);
950                 return -EBUSY;
951         }
952
953         chip->irq = pci->irq;
954         synchronize_irq(chip->irq);
955
956         /* (2) initialization of the chip hardware */
957         if ((err = snd_ad1889_init(chip)) < 0) {
958                 snd_ad1889_free(chip);
959                 return err;
960         }
961
962         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
963                 snd_ad1889_free(chip);
964                 return err;
965         }
966
967         snd_card_set_dev(card, &pci->dev);
968
969         *rchip = chip;
970
971         return 0;
972
973 free_and_ret:
974         kfree(chip);
975         pci_disable_device(pci);
976
977         return err;
978 }
979
980 static int __devinit
981 snd_ad1889_probe(struct pci_dev *pci,
982                  const struct pci_device_id *pci_id)
983 {
984         int err;
985         static int devno;
986         struct snd_card *card;
987         struct snd_ad1889 *chip;
988
989         /* (1) */
990         if (devno >= SNDRV_CARDS)
991                 return -ENODEV;
992         if (!enable[devno]) {
993                 devno++;
994                 return -ENOENT;
995         }
996
997         /* (2) */
998         card = snd_card_new(index[devno], id[devno], THIS_MODULE, 0);
999         /* XXX REVISIT: we can probably allocate chip in this call */
1000         if (card == NULL)
1001                 return -ENOMEM;
1002
1003         strcpy(card->driver, "AD1889");
1004         strcpy(card->shortname, "Analog Devices AD1889");
1005
1006         /* (3) */
1007         err = snd_ad1889_create(card, pci, &chip);
1008         if (err < 0)
1009                 goto free_and_ret;
1010
1011         /* (4) */
1012         sprintf(card->longname, "%s at 0x%lx irq %i",
1013                 card->shortname, chip->bar, chip->irq);
1014
1015         /* (5) */
1016         /* register AC97 mixer */
1017         err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
1018         if (err < 0)
1019                 goto free_and_ret;
1020         
1021         err = snd_ad1889_pcm_init(chip, 0, NULL);
1022         if (err < 0)
1023                 goto free_and_ret;
1024
1025         /* register proc interface */
1026         snd_ad1889_proc_init(chip);
1027
1028         /* (6) */
1029         err = snd_card_register(card);
1030         if (err < 0)
1031                 goto free_and_ret;
1032
1033         /* (7) */
1034         pci_set_drvdata(pci, card);
1035
1036         devno++;
1037         return 0;
1038
1039 free_and_ret:
1040         snd_card_free(card);
1041         return err;
1042 }
1043
1044 static void __devexit
1045 snd_ad1889_remove(struct pci_dev *pci)
1046 {
1047         snd_card_free(pci_get_drvdata(pci));
1048         pci_set_drvdata(pci, NULL);
1049 }
1050
1051 static struct pci_device_id snd_ad1889_ids[] = {
1052         { PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
1053         { 0, },
1054 };
1055 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
1056
1057 static struct pci_driver ad1889_pci_driver = {
1058         .name = "AD1889 Audio",
1059         .id_table = snd_ad1889_ids,
1060         .probe = snd_ad1889_probe,
1061         .remove = __devexit_p(snd_ad1889_remove),
1062 };
1063
1064 static int __init
1065 alsa_ad1889_init(void)
1066 {
1067         return pci_register_driver(&ad1889_pci_driver);
1068 }
1069
1070 static void __exit
1071 alsa_ad1889_fini(void)
1072 {
1073         pci_unregister_driver(&ad1889_pci_driver);
1074 }
1075
1076 module_init(alsa_ad1889_init);
1077 module_exit(alsa_ad1889_fini);