[PATCH] mark struct file_operations const 9
[linux-2.6.git] / sound / oss / ad1889.c
1 /*
2  *  Copyright 2001-2004 Randolph Chung <tausq@debian.org>
3  *
4  *  Analog Devices 1889 PCI audio driver (AD1819 AC97-compatible codec)
5  *
6  *   This program is free software; you can redistribute it and/or modify
7  *   it under the terms of the GNU General Public License as published by
8  *   the Free Software Foundation; either version 2 of the License, or
9  *   (at your option) any later version.
10  *
11  *   This program is distributed in the hope that it will be useful,
12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *   GNU General Public License for more details.
15  *
16  *   You should have received a copy of the GNU General Public License
17  *   along with this program; if not, write to the Free Software
18  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  *   Notes:
21  *   1. Only flat DMA is supported; s-g is not supported right now
22  *
23  *
24 <jsm> tausq: Anyway, to set up sample rates for D to A, you just use the sample rate on the codec. For A to D, you need to set the codec always to 48K (using the split sample rate feature on the codec) and then set the resampler on the AD1889 to the sample rate you want.
25 <jsm> Also, when changing the sample rate on the codec you need to power it down and re power it up for the change to take effect!
26  *
27  * $Id: ad1889.c,v 1.3 2002/10/19 21:31:44 grundler Exp $
28  */
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/ioport.h>
32 #include <linux/pci.h>
33 #include <linux/poll.h>
34 #include <linux/proc_fs.h>
35 #include <linux/slab.h>
36 #include <linux/soundcard.h>
37 #include <linux/ac97_codec.h>
38 #include <linux/sound.h>
39 #include <linux/interrupt.h>
40 #include <linux/mutex.h>
41
42 #include <asm/delay.h>
43 #include <asm/io.h>
44 #include <asm/dma.h>
45 #include <asm/uaccess.h>
46
47 #include "ad1889.h"
48
49 #define DBG(fmt, arg...) printk(fmt, ##arg)
50 #define DEVNAME "ad1889"
51
52 #define NR_HW_CH        4
53 #define DAC_RUNNING     1
54 #define ADC_RUNNING     2
55
56 #define UNDERRUN(dev)   (0)
57
58 #define AD1889_READW(dev,reg) readw(dev->regbase + reg)
59 #define AD1889_WRITEW(dev,reg,val) writew((val), dev->regbase + reg)
60 #define AD1889_READL(dev,reg) readl(dev->regbase + reg)
61 #define AD1889_WRITEL(dev,reg,val) writel((val), dev->regbase + reg)
62
63 //now 100ms
64 /* #define WAIT_10MS()  schedule_timeout(HZ/10) */
65 #define WAIT_10MS()     do { int __i; for (__i = 0; __i < 100; __i++) udelay(1000); } while(0)
66
67 /* currently only support a single device */
68 static ad1889_dev_t *ad1889_dev = NULL;
69
70 /************************* helper routines ***************************** */
71 static inline void ad1889_set_wav_rate(ad1889_dev_t *dev, int rate)
72 {
73         struct ac97_codec *ac97_codec = dev->ac97_codec;
74
75         DBG("Setting WAV rate to %d\n", rate);
76         dev->state[AD_WAV_STATE].dmabuf.rate = rate;
77         AD1889_WRITEW(dev, AD_DS_WAS, rate);
78
79         /* Cycle the DAC to enable the new rate */
80         ac97_codec->codec_write(dev->ac97_codec, AC97_POWER_CONTROL, 0x0200);
81         WAIT_10MS();
82         ac97_codec->codec_write(dev->ac97_codec, AC97_POWER_CONTROL, 0);
83 }
84
85 static inline void ad1889_set_wav_fmt(ad1889_dev_t *dev, int fmt)
86 {
87         u16 tmp;
88
89         DBG("Setting WAV format to 0x%x\n", fmt);
90
91         tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
92         if (fmt & AFMT_S16_LE) {
93                 //tmp |= 0x0100; /* set WA16 */
94                 tmp |= 0x0300; /* set WA16 stereo */
95         } else if (fmt & AFMT_U8) {
96                 tmp &= ~0x0100; /* clear WA16 */
97         } 
98         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
99 }
100
101 static inline void ad1889_set_adc_fmt(ad1889_dev_t *dev, int fmt)
102 {
103         u16 tmp;
104
105         DBG("Setting ADC format to 0x%x\n", fmt);
106
107         tmp = AD1889_READW(ad1889_dev, AD_DS_RAMC);
108         if (fmt & AFMT_S16_LE) {
109                 tmp |= 0x0100; /* set WA16 */
110         } else if (fmt & AFMT_U8) {
111                 tmp &= ~0x0100; /* clear WA16 */
112         } 
113         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, tmp);
114 }
115
116 static void ad1889_start_wav(ad1889_state_t *state)
117 {
118         unsigned long flags;
119         struct dmabuf *dmabuf = &state->dmabuf;
120         int cnt;
121         u16 tmp;
122
123         spin_lock_irqsave(&state->card->lock, flags);
124
125         if (dmabuf->dma_len)    /* DMA already in flight */
126                 goto skip_dma;
127
128         /* setup dma */
129         cnt = dmabuf->wr_ptr - dmabuf->rd_ptr;
130         if (cnt == 0)           /* done - don't need to do anything */
131                 goto skip_dma;
132
133         /* If the wr_ptr has wrapped, only map to the end */
134         if (cnt < 0)
135                 cnt = DMA_SIZE - dmabuf->rd_ptr;
136
137         dmabuf->dma_handle = pci_map_single(ad1889_dev->pci,
138                                         dmabuf->rawbuf + dmabuf->rd_ptr,
139                                         cnt, PCI_DMA_TODEVICE);
140         dmabuf->dma_len = cnt;
141         dmabuf->ready = 1;
142
143         DBG("Starting playback at 0x%p for %ld bytes\n", dmabuf->rawbuf +
144             dmabuf->rd_ptr, dmabuf->dma_len);
145
146         /* load up the current register set */
147         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVCC, cnt);
148         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVICC, cnt);
149         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVCA, dmabuf->dma_handle);
150
151         /* TODO: for now we load the base registers with the same thing */
152         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVBC, cnt);
153         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVIBC, cnt);
154         AD1889_WRITEL(ad1889_dev, AD_DMA_WAVBA, dmabuf->dma_handle);
155
156         /* and we're off to the races... */
157         AD1889_WRITEL(ad1889_dev, AD_DMA_CHSS, 0x8);
158         tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
159         tmp |= 0x0400; /* set WAEN */
160         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
161         (void) AD1889_READW(ad1889_dev, AD_DS_WSMC); /* flush posted PCI write */
162
163         dmabuf->enable |= DAC_RUNNING;
164
165 skip_dma:
166         spin_unlock_irqrestore(&state->card->lock, flags);
167 }
168
169
170 static void ad1889_stop_wav(ad1889_state_t *state)
171 {
172         unsigned long flags;
173         struct dmabuf *dmabuf = &state->dmabuf;
174
175         spin_lock_irqsave(&state->card->lock, flags);
176
177         if (dmabuf->enable & DAC_RUNNING) {
178                 u16 tmp;
179                 unsigned long cnt = dmabuf->dma_len;
180
181                 tmp = AD1889_READW(ad1889_dev, AD_DS_WSMC);
182                 tmp &= ~0x0400; /* clear WAEN */
183                 AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, tmp);
184                 (void) AD1889_READW(ad1889_dev, AD_DS_WSMC); /* flush posted PCI write */
185                 pci_unmap_single(ad1889_dev->pci, dmabuf->dma_handle, 
186                                 cnt, PCI_DMA_TODEVICE);
187
188                 dmabuf->enable &= ~DAC_RUNNING;
189
190                 /* update dma pointers */
191                 dmabuf->rd_ptr += cnt;
192                 dmabuf->rd_ptr &= (DMA_SIZE - 1);
193
194                 dmabuf->dma_handle = 0;
195                 dmabuf->dma_len = 0;
196                 dmabuf->ready = 0;
197
198                 wake_up(&dmabuf->wait);
199         }
200
201         spin_unlock_irqrestore(&state->card->lock, flags);
202 }
203
204
205 #if 0
206 static void ad1889_startstop_adc(ad1889_state_t *state, int start)
207 {
208         u16 tmp;
209         unsigned long flags;
210
211         spin_lock_irqsave(&state->card->lock, flags);
212         
213         tmp = AD1889_READW(ad1889_dev, AD_DS_RAMC);
214         if (start) {
215                 state->dmabuf.enable |= ADC_RUNNING;
216                 tmp |= 0x0004; /* set ADEN */
217         } else {
218                 state->dmabuf.enable &= ~ADC_RUNNING;
219                 tmp &= ~0x0004; /* clear ADEN */
220         }
221         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, tmp);
222
223         spin_unlock_irqrestore(&state->card->lock, flags);
224 }
225 #endif
226
227 static ad1889_dev_t *ad1889_alloc_dev(struct pci_dev *pci)
228 {
229         ad1889_dev_t *dev;
230         struct dmabuf *dmabuf;
231         int i;
232
233         if ((dev = kmalloc(sizeof(ad1889_dev_t), GFP_KERNEL)) == NULL) 
234                 return NULL;
235         memset(dev, 0, sizeof(ad1889_dev_t));
236         spin_lock_init(&dev->lock);
237         dev->pci = pci;
238
239         for (i = 0; i < AD_MAX_STATES; i++) {
240                 dev->state[i].card = dev;
241                 mutex_init(&dev->state[i].mutex);
242                 init_waitqueue_head(&dev->state[i].dmabuf.wait);
243         }
244
245         /* allocate dma buffer */
246
247         for (i = 0; i < AD_MAX_STATES; i++) {
248                 dmabuf = &dev->state[i].dmabuf;
249                 dmabuf->rawbuf = kmalloc(DMA_SIZE, GFP_KERNEL|GFP_DMA);
250                 if (!dmabuf->rawbuf)
251                         goto err_free_dmabuf;
252                 dmabuf->rawbuf_size = DMA_SIZE;
253                 dmabuf->dma_handle = 0;
254                 dmabuf->rd_ptr = dmabuf->wr_ptr = dmabuf->dma_len = 0UL;
255                 dmabuf->ready = 0;
256                 dmabuf->rate = 48000;
257         }
258         return dev;
259
260 err_free_dmabuf:
261         while (--i >= 0)
262                 kfree(dev->state[i].dmabuf.rawbuf);
263         kfree(dev);
264         return NULL;
265 }
266
267 static void ad1889_free_dev(ad1889_dev_t *dev)
268 {
269         int j;
270         struct dmabuf *dmabuf;
271
272         if (dev == NULL) 
273                 return;
274
275         if (dev->ac97_codec)
276                 ac97_release_codec(dev->ac97_codec);
277
278         for (j = 0; j < AD_MAX_STATES; j++) {
279                 dmabuf = &dev->state[j].dmabuf;
280                 kfree(dmabuf->rawbuf);
281         }
282
283         kfree(dev);
284 }
285
286 static inline void ad1889_trigger_playback(ad1889_dev_t *dev)
287 {
288 #if 0
289         u32 val;
290         struct dmabuf *dmabuf = &dev->state[AD_WAV_STATE].dmabuf;
291 #endif
292
293         ad1889_start_wav(&dev->state[AD_WAV_STATE]);
294 }
295
296 static int ad1889_read_proc (char *page, char **start, off_t off,
297                              int count, int *eof, void *data)
298 {
299         char *out = page;
300         int len, i;
301         ad1889_dev_t *dev = data;
302         ad1889_reg_t regs[] = {
303                 { "WSMC", AD_DS_WSMC, 16 },
304                 { "RAMC", AD_DS_RAMC, 16 },
305                 { "WADA", AD_DS_WADA, 16 },
306                 { "SYDA", AD_DS_SYDA, 16 },
307                 { "WAS", AD_DS_WAS, 16 },
308                 { "RES", AD_DS_RES, 16 },
309                 { "CCS", AD_DS_CCS, 16 },
310                 { "ADCBA", AD_DMA_ADCBA, 32 },
311                 { "ADCCA", AD_DMA_ADCCA, 32 },
312                 { "ADCBC", AD_DMA_ADCBC, 32 },
313                 { "ADCCC", AD_DMA_ADCCC, 32 },
314                 { "ADCIBC", AD_DMA_ADCIBC, 32 },
315                 { "ADCICC", AD_DMA_ADCICC, 32 },
316                 { "ADCCTRL", AD_DMA_ADCCTRL, 16 },
317                 { "WAVBA", AD_DMA_WAVBA, 32 },
318                 { "WAVCA", AD_DMA_WAVCA, 32 },
319                 { "WAVBC", AD_DMA_WAVBC, 32 },
320                 { "WAVCC", AD_DMA_WAVCC, 32 },
321                 { "WAVIBC", AD_DMA_WAVIBC, 32 },
322                 { "WAVICC", AD_DMA_WAVICC, 32 },
323                 { "WAVCTRL", AD_DMA_WAVCTRL, 16 },
324                 { "DISR", AD_DMA_DISR, 32 },
325                 { "CHSS", AD_DMA_CHSS, 32 },
326                 { "IPC", AD_GPIO_IPC, 16 },
327                 { "OP", AD_GPIO_OP, 16 },
328                 { "IP", AD_GPIO_IP, 16 },
329                 { "ACIC", AD_AC97_ACIC, 16 },
330                 { "AC97_RESET", AD_AC97_BASE + AC97_RESET, 16 },
331                 { "AC97_MASTER_VOL_STEREO", AD_AC97_BASE + AC97_MASTER_VOL_STEREO, 16 },
332                 { "AC97_HEADPHONE_VOL", AD_AC97_BASE + AC97_HEADPHONE_VOL, 16 },
333                 { "AC97_MASTER_VOL_MONO", AD_AC97_BASE + AC97_MASTER_VOL_MONO, 16 },
334                 { "AC97_MASTER_TONE", AD_AC97_BASE + AC97_MASTER_TONE, 16 },
335                 { "AC97_PCBEEP_VOL", AD_AC97_BASE + AC97_PCBEEP_VOL, 16 },
336                 { "AC97_PHONE_VOL", AD_AC97_BASE + AC97_PHONE_VOL, 16 },
337                 { "AC97_MIC_VOL", AD_AC97_BASE + AC97_MIC_VOL, 16 },
338                 { "AC97_LINEIN_VOL", AD_AC97_BASE + AC97_LINEIN_VOL, 16 },
339                 { "AC97_CD_VOL", AD_AC97_BASE + AC97_CD_VOL, 16 },
340                 { "AC97_VIDEO_VOL", AD_AC97_BASE + AC97_VIDEO_VOL, 16 },
341                 { "AC97_AUX_VOL", AD_AC97_BASE + AC97_AUX_VOL, 16 },
342                 { "AC97_PCMOUT_VOL", AD_AC97_BASE + AC97_PCMOUT_VOL, 16 },
343                 { "AC97_RECORD_SELECT", AD_AC97_BASE + AC97_RECORD_SELECT, 16 },
344                 { "AC97_RECORD_GAIN", AD_AC97_BASE + AC97_RECORD_GAIN, 16 },
345                 { "AC97_RECORD_GAIN_MIC", AD_AC97_BASE + AC97_RECORD_GAIN_MIC, 16 },
346                 { "AC97_GENERAL_PURPOSE", AD_AC97_BASE + AC97_GENERAL_PURPOSE, 16 },
347                 { "AC97_3D_CONTROL", AD_AC97_BASE + AC97_3D_CONTROL, 16 },
348                 { "AC97_MODEM_RATE", AD_AC97_BASE + AC97_MODEM_RATE, 16 },
349                 { "AC97_POWER_CONTROL", AD_AC97_BASE + AC97_POWER_CONTROL, 16 },
350                 { NULL }
351         };
352
353         if (dev == NULL)
354                 return -ENODEV;
355
356         for (i = 0; regs[i].name != 0; i++)
357                 out += sprintf(out, "%s: 0x%0*x\n", regs[i].name, 
358                         regs[i].width >> 2, 
359                         (regs[i].width == 16 
360                                 ? AD1889_READW(dev, regs[i].offset)
361                                 : AD1889_READL(dev, regs[i].offset)));
362
363         for (i = 0; i < AD_MAX_STATES; i++) {
364                 out += sprintf(out, "DMA status for %s:\n", 
365                         (i == AD_WAV_STATE ? "WAV" : "ADC")); 
366                 out += sprintf(out, "\t\t0x%p (IOVA: 0x%llu)\n",
367                         dev->state[i].dmabuf.rawbuf,
368                         (unsigned long long)dev->state[i].dmabuf.dma_handle);
369
370                 out += sprintf(out, "\tread ptr: offset %u\n", 
371                         (unsigned int)dev->state[i].dmabuf.rd_ptr);
372                 out += sprintf(out, "\twrite ptr: offset %u\n", 
373                         (unsigned int)dev->state[i].dmabuf.wr_ptr);
374                 out += sprintf(out, "\tdma len: offset %u\n", 
375                         (unsigned int)dev->state[i].dmabuf.dma_len);
376         }
377
378         len = out - page - off;
379         if (len < count) {
380                 *eof = 1;
381                 if (len <= 0) return 0;
382         } else {
383                 len = count;
384         }
385         *start = page + off;
386         return len;
387 }
388
389 /***************************** DMA interfaces ************************** */
390 #if 0
391 static inline unsigned long ad1889_get_dma_addr(ad1889_state_t *state)
392 {
393         struct dmabuf *dmabuf = &state->dmabuf;
394         u32 offset;
395
396         if (!(dmabuf->enable & (DAC_RUNNING | ADC_RUNNING))) {
397                 printk(KERN_ERR DEVNAME ": get_dma_addr called without dma enabled\n");
398                 return 0;
399         }
400         
401         if (dmabuf->enable & DAC_RUNNING)
402                 offset = le32_to_cpu(AD1889_READL(state->card, AD_DMA_WAVBA));
403         else
404                 offset = le32_to_cpu(AD1889_READL(state->card, AD_DMA_ADCBA));
405
406         return (unsigned long)bus_to_virt((unsigned long)offset) - (unsigned long)dmabuf->rawbuf;
407 }
408
409 static void ad1889_update_ptr(ad1889_dev_t *dev, int wake)
410 {
411         ad1889_state_t *state;
412         struct dmabuf *dmabuf;
413         unsigned long hwptr;
414         int diff;
415
416         /* check ADC first */
417         state = &dev->adc_state;
418         dmabuf = &state->dmabuf;
419         if (dmabuf->enable & ADC_RUNNING) {
420                 hwptr = ad1889_get_dma_addr(state);
421                 diff = (dmabuf->dmasize + hwptr - dmabuf->hwptr) % dmabuf->dmasize;
422
423                 dmabuf->hwptr = hwptr;
424                 dmabuf->total_bytes += diff;
425                 dmabuf->count += diff;
426                 if (dmabuf->count > dmabuf->dmasize)
427                         dmabuf->count = dmabuf->dmasize;
428
429                 if (dmabuf->mapped) {
430                         if (wake & dmabuf->count >= dmabuf->fragsize)
431                                 wake_up(&dmabuf->wait);
432                 } else {
433                         if (wake & dmabuf->count > 0)
434                                 wake_up(&dmabuf->wait);
435                 }
436         }
437
438         /* check DAC */
439         state = &dev->wav_state;
440         dmabuf = &state->dmabuf;
441         if (dmabuf->enable & DAC_RUNNING) {
442 XXX
443
444 }
445 #endif
446
447 /************************* /dev/dsp interfaces ************************* */
448
449 static ssize_t ad1889_read(struct file *file, char __user *buffer, size_t count,
450         loff_t *ppos)
451 {
452         return 0;
453 }
454
455 static ssize_t ad1889_write(struct file *file, const char __user *buffer, size_t count,
456         loff_t *ppos)
457 {
458         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
459         ad1889_state_t *state = &dev->state[AD_WAV_STATE];
460         volatile struct dmabuf *dmabuf = &state->dmabuf;
461         ssize_t ret = 0;
462         DECLARE_WAITQUEUE(wait, current);
463
464         mutex_lock(&state->mutex);
465 #if 0
466         if (dmabuf->mapped) {
467                 ret = -ENXIO;
468                 goto err1;
469         }
470 #endif
471         if (!access_ok(VERIFY_READ, buffer, count)) {
472                 ret = -EFAULT;
473                 goto err1;
474         }
475
476         add_wait_queue(&state->dmabuf.wait, &wait);
477
478         /* start filling dma buffer.... */
479         while (count > 0) {
480                 long rem;
481                 long cnt = count;
482                 unsigned long flags;
483
484                 for (;;) {
485                         long used_bytes;
486                         long timeout;   /* max time for DMA in jiffies */
487
488                         /* buffer is full if wr catches up to rd */
489                         spin_lock_irqsave(&state->card->lock, flags);
490                         used_bytes = dmabuf->wr_ptr - dmabuf->rd_ptr;
491                         timeout = (dmabuf->dma_len * HZ) / dmabuf->rate;
492                         spin_unlock_irqrestore(&state->card->lock, flags);
493
494                         /* adjust for buffer wrap around */
495                         used_bytes = (used_bytes + DMA_SIZE) & (DMA_SIZE - 1);
496
497                         /* If at least one page unused */
498                         if (used_bytes < (DMA_SIZE - 0x1000))
499                                 break;
500
501                         /* dma buffer full */
502
503                         if (file->f_flags & O_NONBLOCK) {
504                                 ret = -EAGAIN;
505                                 goto err2;
506                         }
507
508                         set_current_state(TASK_INTERRUPTIBLE);
509                         schedule_timeout(timeout + 1);
510                         if (signal_pending(current)) {
511                                 ret = -ERESTARTSYS;
512                                 goto err2;
513                         }
514                 }
515
516                 /* watch out for wrapping around static buffer */
517                 spin_lock_irqsave(&state->card->lock, flags);
518                 rem = DMA_SIZE - dmabuf->wr_ptr;
519                 if (cnt > rem)
520                         cnt = rem;
521
522                 rem = dmabuf->wr_ptr;
523
524                 /* update dma pointers */
525                 dmabuf->wr_ptr += cnt;
526                 dmabuf->wr_ptr &= DMA_SIZE - 1; /* wrap ptr if necessary */
527                 spin_unlock_irqrestore(&state->card->lock, flags);
528
529                 /* transfer unwrapped chunk */
530                 if (copy_from_user(dmabuf->rawbuf + rem, buffer, cnt)) {
531                         ret = -EFAULT;
532                         goto err2;
533                 }
534
535                 DBG("Writing 0x%lx bytes to +0x%lx\n", cnt, rem);
536
537                 /* update counters */
538                 count -= cnt;
539                 buffer += cnt;
540                 ret += cnt;
541
542                 /* we have something to play - go play it! */
543                 ad1889_trigger_playback(dev);
544         }
545
546 err2:
547         remove_wait_queue(&state->dmabuf.wait, &wait);
548 err1:
549         mutex_unlock(&state->mutex);
550         return ret;
551 }
552
553 static unsigned int ad1889_poll(struct file *file, struct poll_table_struct *wait)
554 {
555         unsigned int mask = 0;
556 #if 0
557         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
558         ad1889_state_t *state = NULL;
559         struct dmabuf *dmabuf;
560         unsigned long flags;
561         
562         if (!(file->f_mode & (FMODE_READ | FMODE_WRITE)))
563                 return -EINVAL;
564
565         if (file->f_mode & FMODE_WRITE) {
566                 state = &dev->state[AD_WAV_STATE];
567                 if (!state) return 0;
568                 dmabuf = &state->dmabuf;
569                 poll_wait(file, &dmabuf->wait, wait);
570         }
571
572         if (file->f_mode & FMODE_READ) {
573                 state = &dev->state[AD_ADC_STATE];
574                 if (!state) return 0;
575                 dmabuf = &state->dmabuf;
576                 poll_wait(file, &dmabuf->wait, wait);
577         }
578
579         spin_lock_irqsave(&dev->lock, flags);
580         ad1889_update_ptr(dev, 0);
581
582         if (file->f_mode & FMODE_WRITE) {
583                 state = &dev->state[WAV_STATE];
584                 dmabuf = &state->dmabuf;
585                 if (dmabuf->mapped) {
586                         if (dmabuf->count >= (int)dmabuf->fragsize)
587                                 mask |= POLLOUT | POLLWRNORM;
588                 } else {
589                         if ((int)dmabuf->dmasize >= dmabuf->count + 
590                                 (int)dmabuf->fragsize)
591                                 mask |= POLLOUT | POLLWRNORM;
592                 }
593         }
594
595         if (file ->f_mode & FMODE_READ) {
596                 state = &dev->state[AD_ADC_STATE];
597                 dmabuf = &state->dmabuf;
598                 if (dmabuf->count >= (int)dmabuf->fragsize)
599                         mask |= POLLIN | POLLRDNORM;
600         }
601         spin_unlock_irqrestore(&dev->lock, flags);
602
603 #endif
604         return mask;
605 }
606
607 static int ad1889_mmap(struct file *file, struct vm_area_struct *vma)
608 {
609         return 0;
610 }
611
612 static int ad1889_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
613         unsigned long arg)
614 {
615         int val = 0;
616         ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
617         struct dmabuf *dmabuf;
618         audio_buf_info abinfo;
619         int __user *p = (int __user *)arg;
620
621         DBG("ad1889_ioctl cmd 0x%x arg %lu\n", cmd, arg);
622
623         switch (cmd)
624         {
625         case OSS_GETVERSION:
626                 return put_user(SOUND_VERSION, p);
627
628         case SNDCTL_DSP_RESET:
629                 break;
630
631         case SNDCTL_DSP_SYNC:
632                 break;
633
634         case SNDCTL_DSP_SPEED:
635                 /* set sampling rate */
636                 if (get_user(val, p))
637                         return -EFAULT;
638                 if (val > 5400 && val < 48000)
639                 {
640                         if (file->f_mode & FMODE_WRITE)
641                                 AD1889_WRITEW(ad1889_dev, AD_DS_WAS, val);
642                         if (file->f_mode & FMODE_READ)
643                                 AD1889_WRITEW(ad1889_dev, AD_DS_RES, val);
644                 }
645                 return 0;
646
647         case SNDCTL_DSP_STEREO: /* undocumented? */
648                 if (get_user(val, p))
649                         return -EFAULT;
650                 if (file->f_mode & FMODE_READ) {
651                         val = AD1889_READW(ad1889_dev, AD_DS_WSMC);
652                         if (val) {
653                                 val |= 0x0200;  /* set WAST */
654                         } else {
655                                 val &= ~0x0200; /* clear WAST */
656                         }
657                         AD1889_WRITEW(ad1889_dev, AD_DS_WSMC, val);
658                 }
659                 if (file->f_mode & FMODE_WRITE) {
660                         val = AD1889_READW(ad1889_dev, AD_DS_RAMC);
661                         if (val) {
662                                 val |= 0x0002;  /* set ADST */
663                         } else {
664                                 val &= ~0x0002; /* clear ADST */
665                         }
666                         AD1889_WRITEW(ad1889_dev, AD_DS_RAMC, val);
667                 }
668
669                 return 0;
670
671         case SNDCTL_DSP_GETBLKSIZE:
672                 return put_user(DMA_SIZE, p);
673
674         case SNDCTL_DSP_GETFMTS:
675                 return put_user(AFMT_S16_LE|AFMT_U8, p);
676
677         case SNDCTL_DSP_SETFMT:
678                 if (get_user(val, p))
679                         return -EFAULT;
680
681                 if (val == 0) {
682                         if (file->f_mode & FMODE_READ) 
683                                 ad1889_set_adc_fmt(dev, val);
684
685                         if (file->f_mode & FMODE_WRITE) 
686                                 ad1889_set_wav_fmt(dev, val);
687                 } else {
688                         val = AFMT_S16_LE | AFMT_U8;
689                 }
690
691                 return put_user(val, p);
692
693         case SNDCTL_DSP_CHANNELS:
694                 break;
695
696         case SNDCTL_DSP_POST:
697                 /* send all data to device */
698                 break;
699
700         case SNDCTL_DSP_SUBDIVIDE:
701                 break;
702
703         case SNDCTL_DSP_SETFRAGMENT:
704                 /* not supported; uses fixed fragment sizes */
705                 return put_user(DMA_SIZE, p);
706
707         case SNDCTL_DSP_GETOSPACE:
708         case SNDCTL_DSP_GETISPACE:
709                 /* space left in dma buffers */
710                 if (cmd == SNDCTL_DSP_GETOSPACE)
711                         dmabuf = &dev->state[AD_WAV_STATE].dmabuf;
712                 else
713                         dmabuf = &dev->state[AD_ADC_STATE].dmabuf;
714                 abinfo.fragments = 1;
715                 abinfo.fragstotal = 1;
716                 abinfo.fragsize = DMA_SIZE;
717                 abinfo.bytes = DMA_SIZE;
718                 return copy_to_user(p, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
719         case SNDCTL_DSP_NONBLOCK:
720                 file->f_flags |= O_NONBLOCK;
721                 return 0;
722
723         case SNDCTL_DSP_GETCAPS:
724                 return put_user(0, p);
725
726         case SNDCTL_DSP_GETTRIGGER:
727         case SNDCTL_DSP_SETTRIGGER:
728                 break;
729
730         case SNDCTL_DSP_GETIPTR:
731         case SNDCTL_DSP_GETOPTR:
732                 break;
733
734         case SNDCTL_DSP_SETDUPLEX:
735                 break;
736         
737         case SNDCTL_DSP_GETODELAY:
738                 break;
739
740         case SOUND_PCM_READ_RATE:
741                 return put_user(AD1889_READW(ad1889_dev, AD_DS_WAS), p);
742
743         case SOUND_PCM_READ_CHANNELS:
744         case SOUND_PCM_READ_BITS:
745                 break;
746
747         case SNDCTL_DSP_MAPINBUF:
748         case SNDCTL_DSP_MAPOUTBUF:
749         case SNDCTL_DSP_SETSYNCRO:
750         case SOUND_PCM_WRITE_FILTER:
751         case SOUND_PCM_READ_FILTER:
752                 break;
753
754         default:
755                 break;
756         }
757
758         return -ENOTTY;
759 }
760
761 static int ad1889_open(struct inode *inode, struct file *file)
762 {
763         /* check minor; only support /dev/dsp atm */
764         if (iminor(inode) != 3)
765                 return -ENXIO;
766         
767         file->private_data = ad1889_dev;
768
769         ad1889_set_wav_rate(ad1889_dev, 48000);
770         ad1889_set_wav_fmt(ad1889_dev, AFMT_S16_LE);
771         AD1889_WRITEW(ad1889_dev, AD_DS_WADA, 0x0404); /* attenuation */
772         return nonseekable_open(inode, file);
773 }
774
775 static int ad1889_release(struct inode *inode, struct file *file)
776 {
777         /* if we have state free it here */
778         return 0;
779 }
780
781 static const struct file_operations ad1889_fops = {
782         .owner          = THIS_MODULE,
783         .llseek         = no_llseek,
784         .read           = ad1889_read,
785         .write          = ad1889_write,
786         .poll           = ad1889_poll,
787         .ioctl          = ad1889_ioctl,
788         .mmap           = ad1889_mmap,
789         .open           = ad1889_open,
790         .release        = ad1889_release,
791 };
792
793 /************************* /dev/mixer interfaces ************************ */
794 static int ad1889_mixer_open(struct inode *inode, struct file *file)
795 {
796         if (ad1889_dev->ac97_codec->dev_mixer != iminor(inode))
797                 return -ENODEV;
798
799         file->private_data = ad1889_dev->ac97_codec;
800         return 0;
801 }
802
803 static int ad1889_mixer_release(struct inode *inode, struct file *file)
804 {
805         return 0;
806 }
807
808 static int ad1889_mixer_ioctl(struct inode *inode, struct file *file,
809         unsigned int cmd, unsigned long arg)
810 {
811         struct ac97_codec *codec = (struct ac97_codec *)file->private_data;
812         return codec->mixer_ioctl(codec, cmd, arg);
813 }
814
815 static const struct file_operations ad1889_mixer_fops = {
816         .owner          = THIS_MODULE,
817         .llseek         = no_llseek,
818         .ioctl          = ad1889_mixer_ioctl,
819         .open           = ad1889_mixer_open,
820         .release        = ad1889_mixer_release,
821 };
822
823 /************************* AC97 interfaces ****************************** */
824 static void ad1889_codec_write(struct ac97_codec *ac97, u8 reg, u16 val)
825 {
826         ad1889_dev_t *dev = ac97->private_data;
827
828         //DBG("Writing 0x%x to 0x%lx\n", val, dev->regbase + AD_AC97_BASE + reg);
829         AD1889_WRITEW(dev, AD_AC97_BASE + reg, val);
830 }
831
832 static u16 ad1889_codec_read(struct ac97_codec *ac97, u8 reg)
833 {
834         ad1889_dev_t *dev = ac97->private_data;
835         //DBG("Reading from 0x%lx\n", dev->regbase + AD_AC97_BASE + reg);
836         return AD1889_READW(dev, AD_AC97_BASE + reg);
837 }       
838
839 static int ad1889_ac97_init(ad1889_dev_t *dev, int id)
840 {
841         struct ac97_codec *ac97;
842         u16 eid;
843
844         if ((ac97 = ac97_alloc_codec()) == NULL) 
845                 return -ENOMEM;
846
847         ac97->private_data = dev;
848         ac97->id = id;
849
850         ac97->codec_read = ad1889_codec_read;
851         ac97->codec_write = ad1889_codec_write;
852
853         if (ac97_probe_codec(ac97) == 0) {
854                 printk(DEVNAME ": ac97_probe_codec failed\n");
855                 goto out_free;
856         }
857
858         eid = ad1889_codec_read(ac97, AC97_EXTENDED_ID);
859         if (eid == 0xffff) {
860                 printk(KERN_WARNING DEVNAME ": no codec attached?\n");
861                 goto out_free;
862         }
863
864         dev->ac97_features = eid;
865
866         if ((ac97->dev_mixer = register_sound_mixer(&ad1889_mixer_fops, -1)) < 0) {
867                 printk(KERN_ERR DEVNAME ": cannot register mixer\n");
868                 goto out_free;
869         }
870
871         dev->ac97_codec = ac97;
872         return 0;
873
874 out_free:
875         ac97_release_codec(ac97);
876         return -ENODEV;
877 }
878
879 static int ad1889_aclink_reset(struct pci_dev * pcidev)
880 {
881         u16 stat;
882         int retry = 200;
883         ad1889_dev_t *dev = pci_get_drvdata(pcidev);
884
885         AD1889_WRITEW(dev, AD_DS_CCS, 0x8000); /* turn on clock */
886         AD1889_READW(dev, AD_DS_CCS);
887
888         WAIT_10MS();
889
890         stat = AD1889_READW(dev, AD_AC97_ACIC);
891         stat |= 0x0002;                         /* Reset Disable */
892         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
893         (void) AD1889_READW(dev, AD_AC97_ACIC); /* flush posted write */
894
895         udelay(10);
896
897         stat = AD1889_READW(dev, AD_AC97_ACIC);
898         stat |= 0x0001;                         /* Interface Enable */
899         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
900
901         do {
902                 if (AD1889_READW(dev, AD_AC97_ACIC) & 0x8000)   /* Ready */
903                         break;
904                 WAIT_10MS();
905                 retry--;
906         } while (retry > 0);
907
908         if (!retry) {
909                 printk(KERN_ERR "ad1889_aclink_reset: codec is not ready [0x%x]\n",
910                             AD1889_READW(dev, AD_AC97_ACIC));
911                 return -EBUSY;
912         }
913
914         /* TODO reset AC97 codec */
915         /* TODO set wave/adc pci ctrl status */
916
917         stat = AD1889_READW(dev, AD_AC97_ACIC);
918         stat |= 0x0004;                         /* Audio Stream Output Enable */
919         AD1889_WRITEW(dev, AD_AC97_ACIC, stat);
920         return 0;
921 }
922
923 /************************* PCI interfaces ****************************** */
924 /* PCI device table */
925 static struct pci_device_id ad1889_id_tbl[] = {
926         { PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS, PCI_ANY_ID, 
927           PCI_ANY_ID, 0, 0, (unsigned long)DEVNAME },
928         { },
929 };
930 MODULE_DEVICE_TABLE(pci, ad1889_id_tbl);
931
932 static irqreturn_t ad1889_interrupt(int irq, void *dev_id)
933 {
934         u32 stat;
935         ad1889_dev_t *dev = (ad1889_dev_t *)dev_id;
936
937         stat = AD1889_READL(dev, AD_DMA_DISR);
938
939         /* clear ISR */
940         AD1889_WRITEL(dev, AD_DMA_DISR, stat);
941
942         if (stat & 0x8) {               /* WAVI */
943                 DBG("WAV interrupt\n");
944                 dev->stats.wav_intrs++;
945                 if (dev->state[AD_WAV_STATE].dmabuf.ready) {
946                         ad1889_stop_wav(&dev->state[AD_WAV_STATE]);     /* clean up */
947                         ad1889_start_wav(&dev->state[AD_WAV_STATE]);    /* start new */
948                 }
949         }
950
951         if ((stat & 0x2) && dev->state[AD_ADC_STATE].dmabuf.ready) { /* ADCI */
952                 DBG("ADC interrupt\n");
953                 dev->stats.adc_intrs++;
954         }
955         if(stat)
956                 return IRQ_HANDLED;
957         return IRQ_NONE;
958 }
959
960 static void ad1889_initcfg(ad1889_dev_t *dev)
961 {
962         u16 tmp16;
963         u32 tmp32;
964
965         /* make sure the interrupt bits are setup the way we want */
966         tmp32 = AD1889_READL(dev, AD_DMA_WAVCTRL);
967         tmp32 &= ~0xff; /* flat dma, no sg, mask out the intr bits */
968         tmp32 |= 0x6;  /* intr on count, loop */
969         AD1889_WRITEL(dev, AD_DMA_WAVCTRL, tmp32);
970
971         /* unmute... */
972         tmp16 = AD1889_READW(dev, AD_DS_WADA);
973         tmp16 &= ~0x8080;
974         AD1889_WRITEW(dev, AD_DS_WADA, tmp16);
975 }
976
977 static int __devinit ad1889_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
978 {
979         int err;
980         ad1889_dev_t *dev;
981         unsigned long bar;
982         struct proc_dir_entry *proc_root = NULL;
983
984         if ((err = pci_enable_device(pcidev)) != 0) {
985                 printk(KERN_ERR DEVNAME ": pci_enable_device failed\n");
986                 return err;
987         }
988
989         pci_set_master(pcidev);
990         if ((dev = ad1889_alloc_dev(pcidev)) == NULL) {
991                 printk(KERN_ERR DEVNAME ": cannot allocate memory for device\n");
992                 return -ENOMEM;
993         }
994         pci_set_drvdata(pcidev, dev);
995         bar = pci_resource_start(pcidev, 0);
996         
997         if (!(pci_resource_flags(pcidev, 0) & IORESOURCE_MEM)) {
998                 printk(KERN_ERR DEVNAME ": memory region not assigned\n");
999                 goto out1;
1000         }
1001
1002         if (pci_request_region(pcidev, 0, DEVNAME)) {
1003                 printk(KERN_ERR DEVNAME ": unable to request memory region\n");
1004                 goto out1;
1005         }
1006
1007         dev->regbase = ioremap_nocache(bar, AD_DS_IOMEMSIZE);
1008         if (!dev->regbase) {
1009                 printk(KERN_ERR DEVNAME ": unable to remap iomem\n");
1010                 goto out2;
1011         }
1012
1013         if (request_irq(pcidev->irq, ad1889_interrupt, IRQF_SHARED, DEVNAME, dev) != 0) {
1014                 printk(KERN_ERR DEVNAME ": unable to request interrupt\n");
1015                 goto out3;
1016         }
1017
1018         printk(KERN_INFO DEVNAME ": %s at %p IRQ %d\n",
1019                 (char *)ent->driver_data, dev->regbase, pcidev->irq);
1020
1021         if (ad1889_aclink_reset(pcidev) != 0)
1022                 goto out4;
1023
1024         /* register /dev/dsp */
1025         if ((dev->dev_audio = register_sound_dsp(&ad1889_fops, -1)) < 0) {
1026                 printk(KERN_ERR DEVNAME ": cannot register /dev/dsp\n");
1027                 goto out4;
1028         }
1029
1030         if ((err = ad1889_ac97_init(dev, 0)) != 0)
1031                 goto out5;
1032
1033         /* XXX: cleanups */
1034         if (((proc_root = proc_mkdir("driver/ad1889", NULL)) == NULL) ||
1035             create_proc_read_entry("ac97", S_IFREG|S_IRUGO, proc_root, ac97_read_proc, dev->ac97_codec) == NULL ||
1036             create_proc_read_entry("info", S_IFREG|S_IRUGO, proc_root, ad1889_read_proc, dev) == NULL) 
1037                 goto out5;
1038         
1039         ad1889_initcfg(dev);
1040
1041         //DBG(DEVNAME ": Driver initialization done!\n");
1042
1043         ad1889_dev = dev;
1044
1045         return 0;
1046
1047 out5:
1048         unregister_sound_dsp(dev->dev_audio);
1049 out4:
1050         free_irq(pcidev->irq, dev);
1051 out3:
1052         iounmap(dev->regbase);
1053 out2:
1054         pci_release_region(pcidev, 0);
1055 out1:
1056         ad1889_free_dev(dev);
1057         pci_set_drvdata(pcidev, NULL);
1058
1059         return -ENODEV;
1060 }
1061
1062 static void __devexit ad1889_remove(struct pci_dev *pcidev)
1063 {
1064         ad1889_dev_t *dev = pci_get_drvdata(pcidev);
1065
1066         if (dev == NULL) return;
1067         
1068         unregister_sound_mixer(dev->ac97_codec->dev_mixer);
1069         unregister_sound_dsp(dev->dev_audio);
1070         free_irq(pcidev->irq, dev);
1071         iounmap(dev->regbase);
1072         pci_release_region(pcidev, 0);
1073
1074         /* any hw programming needed? */
1075         ad1889_free_dev(dev);
1076         pci_set_drvdata(pcidev, NULL);
1077 }
1078
1079 MODULE_AUTHOR("Randolph Chung");
1080 MODULE_DESCRIPTION("Analog Devices AD1889 PCI Audio");
1081 MODULE_LICENSE("GPL");
1082
1083 static struct pci_driver ad1889_driver = {
1084         .name           = DEVNAME,
1085         .id_table       = ad1889_id_tbl,
1086         .probe          = ad1889_probe,
1087         .remove         = __devexit_p(ad1889_remove),
1088 };
1089
1090 static int __init ad1889_init_module(void)
1091 {
1092         return pci_register_driver(&ad1889_driver);
1093 }
1094
1095 static void ad1889_exit_module(void)
1096 {
1097         pci_unregister_driver(&ad1889_driver);
1098         return;
1099 }
1100
1101 module_init(ad1889_init_module);
1102 module_exit(ad1889_exit_module);