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Linux/sound/pci/ad1889.c

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  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                        __func__);
268                 return -EIO;
269         }
270         ad1889_debug("[%s] ready after %d ms\n", __func__, 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         if (snd_BUG_ON(ptr >= chip->wave.size))
553                 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         if (snd_BUG_ON(ptr >= chip->ramc.size))
572                 return 0;
573         
574         return bytes_to_frames(ss->runtime, ptr);
575 }
576 
577 static struct snd_pcm_ops snd_ad1889_playback_ops = {
578         .open = snd_ad1889_playback_open,
579         .close = snd_ad1889_playback_close,
580         .ioctl = snd_pcm_lib_ioctl,
581         .hw_params = snd_ad1889_hw_params,
582         .hw_free = snd_ad1889_hw_free,
583         .prepare = snd_ad1889_playback_prepare,
584         .trigger = snd_ad1889_playback_trigger,
585         .pointer = snd_ad1889_playback_pointer, 
586 };
587 
588 static struct snd_pcm_ops snd_ad1889_capture_ops = {
589         .open = snd_ad1889_capture_open,
590         .close = snd_ad1889_capture_close,
591         .ioctl = snd_pcm_lib_ioctl,
592         .hw_params = snd_ad1889_hw_params,
593         .hw_free = snd_ad1889_hw_free,
594         .prepare = snd_ad1889_capture_prepare,
595         .trigger = snd_ad1889_capture_trigger,
596         .pointer = snd_ad1889_capture_pointer, 
597 };
598 
599 static irqreturn_t
600 snd_ad1889_interrupt(int irq, void *dev_id)
601 {
602         unsigned long st;
603         struct snd_ad1889 *chip = dev_id;
604 
605         st = ad1889_readl(chip, AD_DMA_DISR);
606 
607         /* clear ISR */
608         ad1889_writel(chip, AD_DMA_DISR, st);
609 
610         st &= AD_INTR_MASK;
611 
612         if (unlikely(!st))
613                 return IRQ_NONE;
614 
615         if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
616                 ad1889_debug("Unexpected master or target abort interrupt!\n");
617 
618         if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
619                 snd_pcm_period_elapsed(chip->psubs);
620         if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
621                 snd_pcm_period_elapsed(chip->csubs);
622 
623         return IRQ_HANDLED;
624 }
625 
626 static int __devinit
627 snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, struct snd_pcm **rpcm)
628 {
629         int err;
630         struct snd_pcm *pcm;
631 
632         if (rpcm)
633                 *rpcm = NULL;
634 
635         err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
636         if (err < 0)
637                 return err;
638 
639         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
640                         &snd_ad1889_playback_ops);
641         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
642                         &snd_ad1889_capture_ops);
643 
644         pcm->private_data = chip;
645         pcm->info_flags = 0;
646         strcpy(pcm->name, chip->card->shortname);
647         
648         chip->pcm = pcm;
649         chip->psubs = NULL;
650         chip->csubs = NULL;
651 
652         err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
653                                                 snd_dma_pci_data(chip->pci),
654                                                 BUFFER_BYTES_MAX / 2,
655                                                 BUFFER_BYTES_MAX);
656 
657         if (err < 0) {
658                 snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
659                 return err;
660         }
661         
662         if (rpcm)
663                 *rpcm = pcm;
664         
665         return 0;
666 }
667 
668 static void
669 snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
670 {
671         struct snd_ad1889 *chip = entry->private_data;
672         u16 reg;
673         int tmp;
674 
675         reg = ad1889_readw(chip, AD_DS_WSMC);
676         snd_iprintf(buffer, "Wave output: %s\n",
677                         (reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
678         snd_iprintf(buffer, "Wave Channels: %s\n",
679                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
680         snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
681                         (reg & AD_DS_WSMC_WA16) ? 16 : 8);
682         
683         /* WARQ is at offset 12 */
684         tmp = (reg & AD_DS_WSMC_WARQ) ?
685                         (((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
686         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
687         
688         snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
689                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
690                                 
691         
692         snd_iprintf(buffer, "Synthesis output: %s\n",
693                         reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
694         
695         /* SYRQ is at offset 4 */
696         tmp = (reg & AD_DS_WSMC_SYRQ) ?
697                         (((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
698         tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
699         
700         snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
701                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
702 
703         reg = ad1889_readw(chip, AD_DS_RAMC);
704         snd_iprintf(buffer, "ADC input: %s\n",
705                         (reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
706         snd_iprintf(buffer, "ADC Channels: %s\n",
707                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
708         snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
709                         (reg & AD_DS_RAMC_AD16) ? 16 : 8);
710         
711         /* ACRQ is at offset 4 */
712         tmp = (reg & AD_DS_RAMC_ACRQ) ?
713                         (((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
714         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
715         
716         snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
717                         (reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
718         
719         snd_iprintf(buffer, "Resampler input: %s\n",
720                         reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
721                         
722         /* RERQ is at offset 12 */
723         tmp = (reg & AD_DS_RAMC_RERQ) ?
724                         (((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
725         tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
726         
727         snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
728                         (reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
729                                 
730         
731         /* doc says LSB represents -1.5dB, but the max value (-94.5dB)
732         suggests that LSB is -3dB, which is more coherent with the logarithmic
733         nature of the dB scale */
734         reg = ad1889_readw(chip, AD_DS_WADA);
735         snd_iprintf(buffer, "Left: %s, -%d dB\n",
736                         (reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
737                         ((reg & AD_DS_WADA_LWAA) >> 8) * 3);
738         reg = ad1889_readw(chip, AD_DS_WADA);
739         snd_iprintf(buffer, "Right: %s, -%d dB\n",
740                         (reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
741                         ((reg & AD_DS_WADA_RWAA) >> 8) * 3);
742         
743         reg = ad1889_readw(chip, AD_DS_WAS);
744         snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
745         reg = ad1889_readw(chip, AD_DS_RES);
746         snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
747 }
748 
749 static void __devinit
750 snd_ad1889_proc_init(struct snd_ad1889 *chip)
751 {
752         struct snd_info_entry *entry;
753 
754         if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
755                 snd_info_set_text_ops(entry, chip, snd_ad1889_proc_read);
756 }
757 
758 static struct ac97_quirk ac97_quirks[] = {
759         {
760                 .subvendor = 0x11d4,    /* AD */
761                 .subdevice = 0x1889,    /* AD1889 */
762                 .codec_id = AC97_ID_AD1819,
763                 .name = "AD1889",
764                 .type = AC97_TUNE_HP_ONLY
765         },
766         { } /* terminator */
767 };
768 
769 static void __devinit
770 snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
771 {
772         u16 reg;
773 
774         reg = ad1889_readw(chip, AD_AC97_ACIC);
775         reg |= AD_AC97_ACIC_ACRD;               /* Reset Disable */
776         ad1889_writew(chip, AD_AC97_ACIC, reg);
777         ad1889_readw(chip, AD_AC97_ACIC);       /* flush posted write */
778         udelay(10);
779         /* Interface Enable */
780         reg |= AD_AC97_ACIC_ACIE;
781         ad1889_writew(chip, AD_AC97_ACIC, reg);
782         
783         snd_ad1889_ac97_ready(chip);
784 
785         /* Audio Stream Output | Variable Sample Rate Mode */
786         reg = ad1889_readw(chip, AD_AC97_ACIC);
787         reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
788         ad1889_writew(chip, AD_AC97_ACIC, reg);
789         ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
790 
791 }
792 
793 static void
794 snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
795 {
796         struct snd_ad1889 *chip = bus->private_data;
797         chip->ac97_bus = NULL;
798 }
799 
800 static void
801 snd_ad1889_ac97_free(struct snd_ac97 *ac97)
802 {
803         struct snd_ad1889 *chip = ac97->private_data;
804         chip->ac97 = NULL;
805 }
806 
807 static int __devinit
808 snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
809 {
810         int err;
811         struct snd_ac97_template ac97;
812         static struct snd_ac97_bus_ops ops = {
813                 .write = snd_ad1889_ac97_write,
814                 .read = snd_ad1889_ac97_read,
815         };
816 
817         /* doing that here, it works. */
818         snd_ad1889_ac97_xinit(chip);
819 
820         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
821         if (err < 0)
822                 return err;
823         
824         chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
825 
826         memset(&ac97, 0, sizeof(ac97));
827         ac97.private_data = chip;
828         ac97.private_free = snd_ad1889_ac97_free;
829         ac97.pci = chip->pci;
830 
831         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
832         if (err < 0)
833                 return err;
834                 
835         snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
836         
837         return 0;
838 }
839 
840 static int
841 snd_ad1889_free(struct snd_ad1889 *chip)
842 {
843         if (chip->irq < 0)
844                 goto skip_hw;
845 
846         spin_lock_irq(&chip->lock);
847 
848         ad1889_mute(chip);
849 
850         /* Turn off interrupt on count and zero DMA registers */
851         ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
852 
853         /* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
854         ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
855         ad1889_readl(chip, AD_DMA_DISR);        /* flush, dammit! */
856 
857         spin_unlock_irq(&chip->lock);
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_BIT_MASK(32)) < 0 ||
913             pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(32)) < 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 = pci_ioremap_bar(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         err = snd_card_create(index[devno], id[devno], THIS_MODULE, 0, &card);
999         /* XXX REVISIT: we can probably allocate chip in this call */
1000         if (err < 0)
1001                 return err;
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);
1078 

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