Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / 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/driver.h>
44 #include <sound/core.h>
45 #include <sound/pcm.h>
46 #include <sound/initval.h>
47 #include <sound/ac97_codec.h>
48
49 #include <asm/io.h>
50
51 #include "ad1889.h"
52 #include "ac97/ac97_id.h"
53
54 #define AD1889_DRVVER   "Version: 1.7"
55
56 MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
57 MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
58 MODULE_LICENSE("GPL");
59 MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");
60
61 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
62 module_param_array(index, int, NULL, 0444);
63 MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");
64
65 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
66 module_param_array(id, charp, NULL, 0444);
67 MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");
68
69 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
70 module_param_array(enable, bool, NULL, 0444);
71 MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");
72
73 static char *ac97_quirk[SNDRV_CARDS];
74 module_param_array(ac97_quirk, charp, NULL, 0444);
75 MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
76
77 #define DEVNAME "ad1889"
78 #define PFX     DEVNAME ": "
79
80 /* let's use the global sound debug interfaces */
81 #define ad1889_debug(fmt, arg...) snd_printd(KERN_DEBUG fmt, ## arg)
82
83 /* keep track of some hw registers */
84 struct ad1889_register_state {
85         u16 reg;        /* reg setup */
86         u32 addr;       /* dma base address */
87         unsigned long size;     /* DMA buffer size */
88 };
89
90 struct snd_ad1889 {
91         struct snd_card *card;
92         struct pci_dev *pci;
93
94         int irq;
95         unsigned long bar;
96         void __iomem *iobase;
97
98         struct snd_ac97 *ac97;
99         struct snd_ac97_bus *ac97_bus;
100         struct snd_pcm *pcm;
101         struct snd_info_entry *proc;
102
103         struct snd_pcm_substream *psubs;
104         struct snd_pcm_substream *csubs;
105
106         /* playback register state */
107         struct ad1889_register_state wave;
108         struct ad1889_register_state ramc;
109
110         spinlock_t lock;
111 };
112
113 static inline u16
114 ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
115 {
116         return readw(chip->iobase + reg);
117 }
118
119 static inline void
120 ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
121 {
122         writew(val, chip->iobase + reg);
123 }
124
125 static inline u32
126 ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
127 {
128         return readl(chip->iobase + reg);
129 }
130
131 static inline void
132 ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
133 {
134         writel(val, chip->iobase + reg);
135 }
136
137 static inline void
138 ad1889_unmute(struct snd_ad1889 *chip)
139 {
140         u16 st;
141         st = ad1889_readw(chip, AD_DS_WADA) & 
142                 ~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
143         ad1889_writew(chip, AD_DS_WADA, st);
144         ad1889_readw(chip, AD_DS_WADA);
145 }
146
147 static inline void
148 ad1889_mute(struct snd_ad1889 *chip)
149 {
150         u16 st;
151         st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
152         ad1889_writew(chip, AD_DS_WADA, st);
153         ad1889_readw(chip, AD_DS_WADA);
154 }
155
156 static inline void
157 ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
158 {
159         ad1889_writel(chip, AD_DMA_ADCBA, address);
160         ad1889_writel(chip, AD_DMA_ADCCA, address);
161 }
162
163 static inline void
164 ad1889_load_adc_buffer_count(struct snd_ad1889 *chip, u32 count)
165 {
166         ad1889_writel(chip, AD_DMA_ADCBC, count);
167         ad1889_writel(chip, AD_DMA_ADCCC, count);
168 }
169
170 static inline void
171 ad1889_load_adc_interrupt_count(struct snd_ad1889 *chip, u32 count)
172 {
173         ad1889_writel(chip, AD_DMA_ADCIB, count);
174         ad1889_writel(chip, AD_DMA_ADCIC, count);
175 }
176
177 static inline void
178 ad1889_load_wave_buffer_address(struct snd_ad1889 *chip, u32 address)
179 {
180         ad1889_writel(chip, AD_DMA_WAVBA, address);
181         ad1889_writel(chip, AD_DMA_WAVCA, address);
182 }
183
184 static inline void
185 ad1889_load_wave_buffer_count(struct snd_ad1889 *chip, u32 count)
186 {
187         ad1889_writel(chip, AD_DMA_WAVBC, count);
188         ad1889_writel(chip, AD_DMA_WAVCC, count);
189 }
190
191 static inline void
192 ad1889_load_wave_interrupt_count(struct snd_ad1889 *chip, u32 count)
193 {
194         ad1889_writel(chip, AD_DMA_WAVIB, count);
195         ad1889_writel(chip, AD_DMA_WAVIC, count);
196 }
197
198 static void
199 ad1889_channel_reset(struct snd_ad1889 *chip, unsigned int channel)
200 {
201         u16 reg;
202         
203         if (channel & AD_CHAN_WAV) {
204                 /* Disable wave channel */
205                 reg = ad1889_readw(chip, AD_DS_WSMC) & ~AD_DS_WSMC_WAEN;
206                 ad1889_writew(chip, AD_DS_WSMC, reg);
207                 chip->wave.reg = reg;
208                 
209                 /* disable IRQs */
210                 reg = ad1889_readw(chip, AD_DMA_WAV);
211                 reg &= AD_DMA_IM_DIS;
212                 reg &= ~AD_DMA_LOOP;
213                 ad1889_writew(chip, AD_DMA_WAV, reg);
214
215                 /* clear IRQ and address counters and pointers */
216                 ad1889_load_wave_buffer_address(chip, 0x0);
217                 ad1889_load_wave_buffer_count(chip, 0x0);
218                 ad1889_load_wave_interrupt_count(chip, 0x0);
219
220                 /* flush */
221                 ad1889_readw(chip, AD_DMA_WAV);
222         }
223         
224         if (channel & AD_CHAN_ADC) {
225                 /* Disable ADC channel */
226                 reg = ad1889_readw(chip, AD_DS_RAMC) & ~AD_DS_RAMC_ADEN;
227                 ad1889_writew(chip, AD_DS_RAMC, reg);
228                 chip->ramc.reg = reg;
229
230                 reg = ad1889_readw(chip, AD_DMA_ADC);
231                 reg &= AD_DMA_IM_DIS;
232                 reg &= ~AD_DMA_LOOP;
233                 ad1889_writew(chip, AD_DMA_ADC, reg);
234         
235                 ad1889_load_adc_buffer_address(chip, 0x0);
236                 ad1889_load_adc_buffer_count(chip, 0x0);
237                 ad1889_load_adc_interrupt_count(chip, 0x0);
238
239                 /* flush */
240                 ad1889_readw(chip, AD_DMA_ADC);
241         }
242 }
243
244 static u16
245 snd_ad1889_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
246 {
247         struct snd_ad1889 *chip = ac97->private_data;
248         return ad1889_readw(chip, AD_AC97_BASE + reg);
249 }
250
251 static void
252 snd_ad1889_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
253 {
254         struct snd_ad1889 *chip = ac97->private_data;
255         ad1889_writew(chip, AD_AC97_BASE + reg, val);
256 }
257
258 static int
259 snd_ad1889_ac97_ready(struct snd_ad1889 *chip)
260 {
261         int retry = 400; /* average needs 352 msec */
262         
263         while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY) 
264                         && --retry)
265                 mdelay(1);
266         if (!retry) {
267                 snd_printk(KERN_ERR PFX "[%s] Link is not ready.\n",
268                        __FUNCTION__);
269                 return -EIO;
270         }
271         ad1889_debug("[%s] ready after %d ms\n", __FUNCTION__, 400 - retry);
272
273         return 0;
274 }
275
276 static int 
277 snd_ad1889_hw_params(struct snd_pcm_substream *substream,
278                         struct snd_pcm_hw_params *hw_params)
279 {
280         return snd_pcm_lib_malloc_pages(substream, 
281                                         params_buffer_bytes(hw_params));
282 }
283
284 static int
285 snd_ad1889_hw_free(struct snd_pcm_substream *substream)
286 {
287         return snd_pcm_lib_free_pages(substream);
288 }
289
290 static struct snd_pcm_hardware snd_ad1889_playback_hw = {
291         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
292                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
293         .formats = SNDRV_PCM_FMTBIT_S16_LE,
294         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
295         .rate_min = 8000,       /* docs say 7000, but we're lazy */
296         .rate_max = 48000,
297         .channels_min = 1,
298         .channels_max = 2,
299         .buffer_bytes_max = BUFFER_BYTES_MAX,
300         .period_bytes_min = PERIOD_BYTES_MIN,
301         .period_bytes_max = PERIOD_BYTES_MAX,
302         .periods_min = PERIODS_MIN,
303         .periods_max = PERIODS_MAX,
304         /*.fifo_size = 0,*/
305 };
306
307 static struct snd_pcm_hardware snd_ad1889_capture_hw = {
308         .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
309                 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
310         .formats = SNDRV_PCM_FMTBIT_S16_LE,
311         .rates = SNDRV_PCM_RATE_48000,
312         .rate_min = 48000,      /* docs say we could to VSR, but we're lazy */
313         .rate_max = 48000,
314         .channels_min = 1,
315         .channels_max = 2,
316         .buffer_bytes_max = BUFFER_BYTES_MAX,
317         .period_bytes_min = PERIOD_BYTES_MIN,
318         .period_bytes_max = PERIOD_BYTES_MAX,
319         .periods_min = PERIODS_MIN,
320         .periods_max = PERIODS_MAX,
321         /*.fifo_size = 0,*/
322 };
323
324 static int
325 snd_ad1889_playback_open(struct snd_pcm_substream *ss)
326 {
327         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
328         struct snd_pcm_runtime *rt = ss->runtime;
329
330         chip->psubs = ss;
331         rt->hw = snd_ad1889_playback_hw;
332
333         return 0;
334 }
335
336 static int
337 snd_ad1889_capture_open(struct snd_pcm_substream *ss)
338 {
339         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
340         struct snd_pcm_runtime *rt = ss->runtime;
341
342         chip->csubs = ss;
343         rt->hw = snd_ad1889_capture_hw;
344
345         return 0;
346 }
347
348 static int
349 snd_ad1889_playback_close(struct snd_pcm_substream *ss)
350 {
351         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
352         chip->psubs = NULL;
353         return 0;
354 }
355
356 static int
357 snd_ad1889_capture_close(struct snd_pcm_substream *ss)
358 {
359         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
360         chip->csubs = NULL;
361         return 0;
362 }
363
364 static int
365 snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
366 {
367         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
368         struct snd_pcm_runtime *rt = ss->runtime;
369         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
370         unsigned int count = snd_pcm_lib_period_bytes(ss);
371         u16 reg;
372
373         ad1889_channel_reset(chip, AD_CHAN_WAV);
374
375         reg = ad1889_readw(chip, AD_DS_WSMC);
376         
377         /* Mask out 16-bit / Stereo */
378         reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
379
380         if (snd_pcm_format_width(rt->format) == 16)
381                 reg |= AD_DS_WSMC_WA16;
382
383         if (rt->channels > 1)
384                 reg |= AD_DS_WSMC_WAST;
385
386         /* let's make sure we don't clobber ourselves */
387         spin_lock_irq(&chip->lock);
388         
389         chip->wave.size = size;
390         chip->wave.reg = reg;
391         chip->wave.addr = rt->dma_addr;
392
393         ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
394         
395         /* Set sample rates on the codec */
396         ad1889_writew(chip, AD_DS_WAS, rt->rate);
397
398         /* Set up DMA */
399         ad1889_load_wave_buffer_address(chip, chip->wave.addr);
400         ad1889_load_wave_buffer_count(chip, size);
401         ad1889_load_wave_interrupt_count(chip, count);
402
403         /* writes flush */
404         ad1889_readw(chip, AD_DS_WSMC);
405         
406         spin_unlock_irq(&chip->lock);
407         
408         ad1889_debug("prepare playback: addr = 0x%x, count = %u, "
409                         "size = %u, reg = 0x%x, rate = %u\n", chip->wave.addr,
410                         count, size, reg, rt->rate);
411         return 0;
412 }
413
414 static int
415 snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
416 {
417         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
418         struct snd_pcm_runtime *rt = ss->runtime;
419         unsigned int size = snd_pcm_lib_buffer_bytes(ss);
420         unsigned int count = snd_pcm_lib_period_bytes(ss);
421         u16 reg;
422
423         ad1889_channel_reset(chip, AD_CHAN_ADC);
424         
425         reg = ad1889_readw(chip, AD_DS_RAMC);
426
427         /* Mask out 16-bit / Stereo */
428         reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
429
430         if (snd_pcm_format_width(rt->format) == 16)
431                 reg |= AD_DS_RAMC_AD16;
432
433         if (rt->channels > 1)
434                 reg |= AD_DS_RAMC_ADST;
435
436         /* let's make sure we don't clobber ourselves */
437         spin_lock_irq(&chip->lock);
438         
439         chip->ramc.size = size;
440         chip->ramc.reg = reg;
441         chip->ramc.addr = rt->dma_addr;
442
443         ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
444
445         /* Set up DMA */
446         ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
447         ad1889_load_adc_buffer_count(chip, size);
448         ad1889_load_adc_interrupt_count(chip, count);
449
450         /* writes flush */
451         ad1889_readw(chip, AD_DS_RAMC);
452         
453         spin_unlock_irq(&chip->lock);
454         
455         ad1889_debug("prepare capture: addr = 0x%x, count = %u, "
456                         "size = %u, reg = 0x%x, rate = %u\n", chip->ramc.addr,
457                         count, size, reg, rt->rate);
458         return 0;
459 }
460
461 /* this is called in atomic context with IRQ disabled.
462    Must be as fast as possible and not sleep.
463    DMA should be *triggered* by this call.
464    The WSMC "WAEN" bit triggers DMA Wave On/Off */
465 static int
466 snd_ad1889_playback_trigger(struct snd_pcm_substream *ss, int cmd)
467 {
468         u16 wsmc;
469         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
470         
471         wsmc = ad1889_readw(chip, AD_DS_WSMC);
472
473         switch (cmd) {
474         case SNDRV_PCM_TRIGGER_START:
475                 /* enable DMA loop & interrupts */
476                 ad1889_writew(chip, AD_DMA_WAV, AD_DMA_LOOP | AD_DMA_IM_CNT);
477                 wsmc |= AD_DS_WSMC_WAEN;
478                 /* 1 to clear CHSS bit */
479                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_WAVS);
480                 ad1889_unmute(chip);
481                 break;
482         case SNDRV_PCM_TRIGGER_STOP:
483                 ad1889_mute(chip);
484                 wsmc &= ~AD_DS_WSMC_WAEN;
485                 break;
486         default:
487                 snd_BUG();
488                 return -EINVAL;
489         }
490         
491         chip->wave.reg = wsmc;
492         ad1889_writew(chip, AD_DS_WSMC, wsmc);  
493         ad1889_readw(chip, AD_DS_WSMC); /* flush */
494
495         /* reset the chip when STOP - will disable IRQs */
496         if (cmd == SNDRV_PCM_TRIGGER_STOP)
497                 ad1889_channel_reset(chip, AD_CHAN_WAV);
498
499         return 0;
500 }
501
502 /* this is called in atomic context with IRQ disabled.
503    Must be as fast as possible and not sleep.
504    DMA should be *triggered* by this call.
505    The RAMC "ADEN" bit triggers DMA ADC On/Off */
506 static int
507 snd_ad1889_capture_trigger(struct snd_pcm_substream *ss, int cmd)
508 {
509         u16 ramc;
510         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
511
512         ramc = ad1889_readw(chip, AD_DS_RAMC);
513         
514         switch (cmd) {
515         case SNDRV_PCM_TRIGGER_START:
516                 /* enable DMA loop & interrupts */
517                 ad1889_writew(chip, AD_DMA_ADC, AD_DMA_LOOP | AD_DMA_IM_CNT);
518                 ramc |= AD_DS_RAMC_ADEN;
519                 /* 1 to clear CHSS bit */
520                 ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_ADCS);
521                 break;
522         case SNDRV_PCM_TRIGGER_STOP:
523                 ramc &= ~AD_DS_RAMC_ADEN;
524                 break;
525         default:
526                 return -EINVAL;
527         }
528         
529         chip->ramc.reg = ramc;
530         ad1889_writew(chip, AD_DS_RAMC, ramc);  
531         ad1889_readw(chip, AD_DS_RAMC); /* flush */
532         
533         /* reset the chip when STOP - will disable IRQs */
534         if (cmd == SNDRV_PCM_TRIGGER_STOP)
535                 ad1889_channel_reset(chip, AD_CHAN_ADC);
536                 
537         return 0;
538 }
539
540 /* Called in atomic context with IRQ disabled */
541 static snd_pcm_uframes_t
542 snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
543 {
544         size_t ptr = 0;
545         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
546
547         if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
548                 return 0;
549
550         ptr = ad1889_readl(chip, AD_DMA_WAVCA);
551         ptr -= chip->wave.addr;
552         
553         snd_assert((ptr >= 0) && (ptr < chip->wave.size), return 0);
554         
555         return bytes_to_frames(ss->runtime, ptr);
556 }
557
558 /* Called in atomic context with IRQ disabled */
559 static snd_pcm_uframes_t
560 snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
561 {
562         size_t ptr = 0;
563         struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
564
565         if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
566                 return 0;
567
568         ptr = ad1889_readl(chip, AD_DMA_ADCCA);
569         ptr -= chip->ramc.addr;
570
571         snd_assert((ptr >= 0) && (ptr < chip->ramc.size), return 0);
572         
573         return bytes_to_frames(ss->runtime, ptr);
574 }
575
576 static struct snd_pcm_ops snd_ad1889_playback_ops = {
577         .open = snd_ad1889_playback_open,
578         .close = snd_ad1889_playback_close,
579         .ioctl = snd_pcm_lib_ioctl,
580         .hw_params = snd_ad1889_hw_params,
581         .hw_free = snd_ad1889_hw_free,
582         .prepare = snd_ad1889_playback_prepare,
583         .trigger = snd_ad1889_playback_trigger,
584         .pointer = snd_ad1889_playback_pointer, 
585 };
586
587 static struct snd_pcm_ops snd_ad1889_capture_ops = {
588         .open = snd_ad1889_capture_open,
589         .close = snd_ad1889_capture_close,
590         .ioctl = snd_pcm_lib_ioctl,
591         .hw_params = snd_ad1889_hw_params,
592         .hw_free = snd_ad1889_hw_free,
593         .prepare = snd_ad1889_capture_prepare,
594         .trigger = snd_ad1889_capture_trigger,
595         .pointer = snd_ad1889_capture_pointer, 
596 };
597
598 static irqreturn_t
599 snd_ad1889_interrupt(int irq, void *dev_id)
600 {
601         unsigned long st;
602         struct snd_ad1889 *chip = dev_id;
603
604         st = ad1889_readl(chip, AD_DMA_DISR);
605
606         /* clear ISR */
607         ad1889_writel(chip, AD_DMA_DISR, st);
608
609         st &= AD_INTR_MASK;
610
611         if (unlikely(!st))
612                 return IRQ_NONE;
613
614         if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
615                 ad1889_debug("Unexpected master or target abort interrupt!\n");
616
617         if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
618                 snd_pcm_period_elapsed(chip->psubs);
619         if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
620                 snd_pcm_period_elapsed(chip->csubs);
621
622         return IRQ_HANDLED;
623 }
624
625 static int __devinit
626 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, struct snd_pcm **rpcm)
627 {
628         int err;
629         struct snd_pcm *pcm;
630
631         if (rpcm)
632                 *rpcm = NULL;
633
634         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
635         if (err < 0)
636                 return err;
637
638         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
639                         &snd_ad1889_playback_ops);
640         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
641                         &snd_ad1889_capture_ops);
642
643         pcm->private_data = chip;
644         pcm->info_flags = 0;
645         strcpy(pcm->name, chip->card->shortname);
646         
647         chip->pcm = pcm;
648         chip->psubs = NULL;
649         chip->csubs = NULL;
650
651         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
652                                                 snd_dma_pci_data(chip->pci),
653                                                 BUFFER_BYTES_MAX / 2,
654                                                 BUFFER_BYTES_MAX);
655
656         if (err < 0) {
657                 snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
658                 return err;
659         }
660         
661         if (rpcm)
662                 *rpcm = pcm;
663         
664         return 0;
665 }
666
667 static void
668 snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
669 {
670         struct snd_ad1889 *chip = entry->private_data;
671         u16 reg;
672         int tmp;
673
674         reg = ad1889_readw(chip, AD_DS_WSMC);
675         snd_iprintf(buffer, "Wave output: %s\n",
676                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
677         snd_iprintf(buffer, "Wave Channels: %s\n",
678                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
679         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
680                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
681         
682         /* WARQ is at offset 12 */
683         tmp = (reg & AD_DS_WSMC_WARQ) ?
684                         (((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
685         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
686         
687         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
688                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
689                                 
690         
691         snd_iprintf(buffer, "Synthesis output: %s\n",
692                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
693         
694         /* SYRQ is at offset 4 */
695         tmp = (reg & AD_DS_WSMC_SYRQ) ?
696                         (((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
697         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
698         
699         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
700                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
701
702         reg = ad1889_readw(chip, AD_DS_RAMC);
703         snd_iprintf(buffer, "ADC input: %s\n",
704                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
705         snd_iprintf(buffer, "ADC Channels: %s\n",
706                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
707         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
708                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
709         
710         /* ACRQ is at offset 4 */
711         tmp = (reg & AD_DS_RAMC_ACRQ) ?
712                         (((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
713         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
714         
715         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
716                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
717         
718         snd_iprintf(buffer, "Resampler input: %s\n",
719                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
720                         
721         /* RERQ is at offset 12 */
722         tmp = (reg & AD_DS_RAMC_RERQ) ?
723                         (((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
724         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
725         
726         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
727                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
728                                 
729         
730         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
731         suggests that LSB is -3dB, which is more coherent with the logarithmic
732         nature of the dB scale */
733         reg = ad1889_readw(chip, AD_DS_WADA);
734         snd_iprintf(buffer, "Left: %s, -%d dB\n",
735                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
736                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
737         reg = ad1889_readw(chip, AD_DS_WADA);
738         snd_iprintf(buffer, "Right: %s, -%d dB\n",
739                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
740                         ((reg & AD_DS_WADA_RWAA) >> 8) * 3);
741         
742         reg = ad1889_readw(chip, AD_DS_WAS);
743         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
744         reg = ad1889_readw(chip, AD_DS_RES);
745         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
746 }
747
748 static void __devinit
749 snd_ad1889_proc_init(struct snd_ad1889 *chip)
750 {
751         struct snd_info_entry *entry;
752
753         if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
754                 snd_info_set_text_ops(entry, chip, snd_ad1889_proc_read);
755 }
756
757 static struct ac97_quirk ac97_quirks[] = {
758         {
759                 .subvendor = 0x11d4,    /* AD */
760                 .subdevice = 0x1889,    /* AD1889 */
761                 .codec_id = AC97_ID_AD1819,
762                 .name = "AD1889",
763                 .type = AC97_TUNE_HP_ONLY
764         },
765         { } /* terminator */
766 };
767
768 static void __devinit
769 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
770 {
771         u16 reg;
772
773         reg = ad1889_readw(chip, AD_AC97_ACIC);
774         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
775         ad1889_writew(chip, AD_AC97_ACIC, reg);
776         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
777         udelay(10);
778         /* Interface Enable */
779         reg |= AD_AC97_ACIC_ACIE;
780         ad1889_writew(chip, AD_AC97_ACIC, reg);
781         
782         snd_ad1889_ac97_ready(chip);
783
784         /* Audio Stream Output | Variable Sample Rate Mode */
785         reg = ad1889_readw(chip, AD_AC97_ACIC);
786         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
787         ad1889_writew(chip, AD_AC97_ACIC, reg);
788         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
789
790 }
791
792 static void
793 snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
794 {
795         struct snd_ad1889 *chip = bus->private_data;
796         chip->ac97_bus = NULL;
797 }
798
799 static void
800 snd_ad1889_ac97_free(struct snd_ac97 *ac97)
801 {
802         struct snd_ad1889 *chip = ac97->private_data;
803         chip->ac97 = NULL;
804 }
805
806 static int __devinit
807 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
808 {
809         int err;
810         struct snd_ac97_template ac97;
811         static struct snd_ac97_bus_ops ops = {
812                 .write = snd_ad1889_ac97_write,
813                 .read = snd_ad1889_ac97_read,
814         };
815
816         /* doing that here, it works. */
817         snd_ad1889_ac97_xinit(chip);
818
819         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
820         if (err < 0)
821                 return err;
822         
823         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
824
825         memset(&ac97, 0, sizeof(ac97));
826         ac97.private_data = chip;
827         ac97.private_free = snd_ad1889_ac97_free;
828         ac97.pci = chip->pci;
829
830         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
831         if (err < 0)
832                 return err;
833                 
834         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
835         
836         return 0;
837 }
838
839 static int
840 snd_ad1889_free(struct snd_ad1889 *chip)
841 {
842         if (chip->irq < 0)
843                 goto skip_hw;
844
845         spin_lock_irq(&chip->lock);
846
847         ad1889_mute(chip);
848
849         /* Turn off interrupt on count and zero DMA registers */
850         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
851
852         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
853         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
854         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
855
856         spin_unlock_irq(&chip->lock);
857
858         synchronize_irq(chip->irq);
859         
860         if (chip->irq >= 0)
861                 free_irq(chip->irq, (void*)chip);
862
863 skip_hw:
864         if (chip->iobase)
865                 iounmap(chip->iobase);
866
867         pci_release_regions(chip->pci);
868         pci_disable_device(chip->pci);
869
870         kfree(chip);
871         return 0;
872 }
873
874 static int
875 snd_ad1889_dev_free(struct snd_device *device) 
876 {
877         struct snd_ad1889 *chip = device->device_data;
878         return snd_ad1889_free(chip);
879 }
880
881 static int __devinit
882 snd_ad1889_init(struct snd_ad1889 *chip) 
883 {
884         ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
885         ad1889_readw(chip, AD_DS_CCS);  /* flush posted write */
886
887         mdelay(10);
888
889         /* enable Master and Target abort interrupts */
890         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
891
892         return 0;
893 }
894
895 static int __devinit
896 snd_ad1889_create(struct snd_card *card,
897                   struct pci_dev *pci,
898                   struct snd_ad1889 **rchip)
899 {
900         int err;
901
902         struct snd_ad1889 *chip;
903         static struct snd_device_ops ops = {
904                 .dev_free = snd_ad1889_dev_free,
905         };
906
907         *rchip = NULL;
908
909         if ((err = pci_enable_device(pci)) < 0)
910                 return err;
911
912         /* check PCI availability (32bit DMA) */
913         if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
914             pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
915                 printk(KERN_ERR PFX "error setting 32-bit DMA mask.\n");
916                 pci_disable_device(pci);
917                 return -ENXIO;
918         }
919
920         /* allocate chip specific data with zero-filled memory */
921         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
922                 pci_disable_device(pci);
923                 return -ENOMEM;
924         }
925
926         chip->card = card;
927         card->private_data = chip;
928         chip->pci = pci;
929         chip->irq = -1;
930
931         /* (1) PCI resource allocation */
932         if ((err = pci_request_regions(pci, card->driver)) < 0)
933                 goto free_and_ret;
934
935         chip->bar = pci_resource_start(pci, 0);
936         chip->iobase = ioremap_nocache(chip->bar, pci_resource_len(pci, 0));
937         if (chip->iobase == NULL) {
938                 printk(KERN_ERR PFX "unable to reserve region.\n");
939                 err = -EBUSY;
940                 goto free_and_ret;
941         }
942         
943         pci_set_master(pci);
944
945         spin_lock_init(&chip->lock);    /* only now can we call ad1889_free */
946
947         if (request_irq(pci->irq, snd_ad1889_interrupt,
948                         IRQF_DISABLED|IRQF_SHARED, card->driver, (void*)chip)) {
949                 printk(KERN_ERR PFX "cannot obtain IRQ %d\n", pci->irq);
950                 snd_ad1889_free(chip);
951                 return -EBUSY;
952         }
953
954         chip->irq = pci->irq;
955         synchronize_irq(chip->irq);
956
957         /* (2) initialization of the chip hardware */
958         if ((err = snd_ad1889_init(chip)) < 0) {
959                 snd_ad1889_free(chip);
960                 return err;
961         }
962
963         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
964                 snd_ad1889_free(chip);
965                 return err;
966         }
967
968         snd_card_set_dev(card, &pci->dev);
969
970         *rchip = chip;
971
972         return 0;
973
974 free_and_ret:
975         kfree(chip);
976         pci_disable_device(pci);
977
978         return err;
979 }
980
981 static int __devinit
982 snd_ad1889_probe(struct pci_dev *pci,
983                  const struct pci_device_id *pci_id)
984 {
985         int err;
986         static int devno;
987         struct snd_card *card;
988         struct snd_ad1889 *chip;
989
990         /* (1) */
991         if (devno >= SNDRV_CARDS)
992                 return -ENODEV;
993         if (!enable[devno]) {
994                 devno++;
995                 return -ENOENT;
996         }
997
998         /* (2) */
999         card = snd_card_new(index[devno], id[devno], THIS_MODULE, 0);
1000         /* XXX REVISIT: we can probably allocate chip in this call */
1001         if (card == NULL)
1002                 return -ENOMEM;
1003
1004         strcpy(card->driver, "AD1889");
1005         strcpy(card->shortname, "Analog Devices AD1889");
1006
1007         /* (3) */
1008         err = snd_ad1889_create(card, pci, &chip);
1009         if (err < 0)
1010                 goto free_and_ret;
1011
1012         /* (4) */
1013         sprintf(card->longname, "%s at 0x%lx irq %i",
1014                 card->shortname, chip->bar, chip->irq);
1015
1016         /* (5) */
1017         /* register AC97 mixer */
1018         err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
1019         if (err < 0)
1020                 goto free_and_ret;
1021         
1022         err = snd_ad1889_pcm_init(chip, 0, NULL);
1023         if (err < 0)
1024                 goto free_and_ret;
1025
1026         /* register proc interface */
1027         snd_ad1889_proc_init(chip);
1028
1029         /* (6) */
1030         err = snd_card_register(card);
1031         if (err < 0)
1032                 goto free_and_ret;
1033
1034         /* (7) */
1035         pci_set_drvdata(pci, card);
1036
1037         devno++;
1038         return 0;
1039
1040 free_and_ret:
1041         snd_card_free(card);
1042         return err;
1043 }
1044
1045 static void __devexit
1046 snd_ad1889_remove(struct pci_dev *pci)
1047 {
1048         snd_card_free(pci_get_drvdata(pci));
1049         pci_set_drvdata(pci, NULL);
1050 }
1051
1052 static struct pci_device_id snd_ad1889_ids[] = {
1053         { PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
1054         { 0, },
1055 };
1056 MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
1057
1058 static struct pci_driver ad1889_pci = {
1059         .name = "AD1889 Audio",
1060         .id_table = snd_ad1889_ids,
1061         .probe = snd_ad1889_probe,
1062         .remove = __devexit_p(snd_ad1889_remove),
1063 };
1064
1065 static int __init
1066 alsa_ad1889_init(void)
1067 {
1068         return pci_register_driver(&ad1889_pci);
1069 }
1070
1071 static void __exit
1072 alsa_ad1889_fini(void)
1073 {
1074         pci_unregister_driver(&ad1889_pci);
1075 }
1076
1077 module_init(alsa_ad1889_init);
1078 module_exit(alsa_ad1889_fini);