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TOMOYO Linux Cross Reference
Linux/sound/pci/als300.c

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  1 // SPDX-License-Identifier: GPL-2.0-or-later
  2 /*
  3  *  als300.c - driver for Avance Logic ALS300/ALS300+ soundcards.
  4  *  Copyright (C) 2005 by Ash Willis <ashwillis@programmer.net>
  5  *
  6  *  TODO
  7  *  4 channel playback for ALS300+
  8  *  gameport
  9  *  mpu401
 10  *  opl3
 11  *
 12  *  NOTES
 13  *  The BLOCK_COUNTER registers for the ALS300(+) return a figure related to
 14  *  the position in the current period, NOT the whole buffer. It is important
 15  *  to know which period we are in so we can calculate the correct pointer.
 16  *  This is why we always use 2 periods. We can then use a flip-flop variable
 17  *  to keep track of what period we are in.
 18  */
 19 
 20 #include <linux/delay.h>
 21 #include <linux/init.h>
 22 #include <linux/module.h>
 23 #include <linux/pci.h>
 24 #include <linux/dma-mapping.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/slab.h>
 27 #include <linux/io.h>
 28 
 29 #include <sound/core.h>
 30 #include <sound/control.h>
 31 #include <sound/initval.h>
 32 #include <sound/pcm.h>
 33 #include <sound/pcm_params.h>
 34 #include <sound/ac97_codec.h>
 35 #include <sound/opl3.h>
 36 
 37 /* snd_als300_set_irq_flag */
 38 #define IRQ_DISABLE             0
 39 #define IRQ_ENABLE              1
 40 
 41 /* I/O port layout */
 42 #define AC97_ACCESS             0x00
 43 #define AC97_READ               0x04
 44 #define AC97_STATUS             0x06
 45 #define   AC97_DATA_AVAIL               (1<<6)
 46 #define   AC97_BUSY                     (1<<7)
 47 #define ALS300_IRQ_STATUS       0x07            /* ALS300 Only */
 48 #define   IRQ_PLAYBACK                  (1<<3)
 49 #define   IRQ_CAPTURE                   (1<<2)
 50 #define GCR_DATA                0x08
 51 #define GCR_INDEX               0x0C
 52 #define ALS300P_DRAM_IRQ_STATUS 0x0D            /* ALS300+ Only */
 53 #define MPU_IRQ_STATUS          0x0E            /* ALS300 Rev. E+, ALS300+ */
 54 #define ALS300P_IRQ_STATUS      0x0F            /* ALS300+ Only */
 55 
 56 /* General Control Registers */
 57 #define PLAYBACK_START          0x80
 58 #define PLAYBACK_END            0x81
 59 #define PLAYBACK_CONTROL        0x82
 60 #define   TRANSFER_START                (1<<16)
 61 #define   FIFO_PAUSE                    (1<<17)
 62 #define RECORD_START            0x83
 63 #define RECORD_END              0x84
 64 #define RECORD_CONTROL          0x85
 65 #define DRAM_WRITE_CONTROL      0x8B
 66 #define   WRITE_TRANS_START             (1<<16)
 67 #define   DRAM_MODE_2                   (1<<17)
 68 #define MISC_CONTROL            0x8C
 69 #define   IRQ_SET_BIT                   (1<<15)
 70 #define   VMUTE_NORMAL                  (1<<20)
 71 #define   MMUTE_NORMAL                  (1<<21)
 72 #define MUS_VOC_VOL             0x8E
 73 #define PLAYBACK_BLOCK_COUNTER  0x9A
 74 #define RECORD_BLOCK_COUNTER    0x9B
 75 
 76 #define DEBUG_PLAY_REC  0
 77 
 78 #if DEBUG_PLAY_REC
 79 #define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
 80 #else
 81 #define snd_als300_dbgplay(format, args...)
 82 #endif          
 83 
 84 enum {DEVICE_ALS300, DEVICE_ALS300_PLUS};
 85 
 86 MODULE_AUTHOR("Ash Willis <ashwillis@programmer.net>");
 87 MODULE_DESCRIPTION("Avance Logic ALS300");
 88 MODULE_LICENSE("GPL");
 89 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS300},{Avance Logic,ALS300+}}");
 90 
 91 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 92 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 93 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 94 
 95 module_param_array(index, int, NULL, 0444);
 96 MODULE_PARM_DESC(index, "Index value for ALS300 sound card.");
 97 module_param_array(id, charp, NULL, 0444);
 98 MODULE_PARM_DESC(id, "ID string for ALS300 sound card.");
 99 module_param_array(enable, bool, NULL, 0444);
100 MODULE_PARM_DESC(enable, "Enable ALS300 sound card.");
101 
102 struct snd_als300 {
103         unsigned long port;
104         spinlock_t reg_lock;
105         struct snd_card *card;
106         struct pci_dev *pci;
107 
108         struct snd_pcm *pcm;
109         struct snd_pcm_substream *playback_substream;
110         struct snd_pcm_substream *capture_substream;
111 
112         struct snd_ac97 *ac97;
113         struct snd_opl3 *opl3;
114 
115         struct resource *res_port;
116 
117         int irq;
118 
119         int chip_type; /* ALS300 or ALS300+ */
120 
121         char revision;  
122 };
123 
124 struct snd_als300_substream_data {
125         int period_flipflop;
126         int control_register;
127         int block_counter_register;
128 };
129 
130 static const struct pci_device_id snd_als300_ids[] = {
131         { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
132         { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
133         { 0, }
134 };
135 
136 MODULE_DEVICE_TABLE(pci, snd_als300_ids);
137 
138 static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
139 {
140         outb(reg, port+GCR_INDEX);
141         return inl(port+GCR_DATA);
142 }
143 
144 static inline void snd_als300_gcr_write(unsigned long port,
145                                                 unsigned short reg, u32 val)
146 {
147         outb(reg, port+GCR_INDEX);
148         outl(val, port+GCR_DATA);
149 }
150 
151 /* Enable/Disable Interrupts */
152 static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
153 {
154         u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
155 
156         /* boolean XOR check, since old vs. new hardware have
157            directly reversed bit setting for ENABLE and DISABLE.
158            ALS300+ acts like newer versions of ALS300 */
159         if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
160                                                 (cmd == IRQ_ENABLE)) == 0)
161                 tmp |= IRQ_SET_BIT;
162         else
163                 tmp &= ~IRQ_SET_BIT;
164         snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
165 }
166 
167 static int snd_als300_free(struct snd_als300 *chip)
168 {
169         snd_als300_set_irq_flag(chip, IRQ_DISABLE);
170         if (chip->irq >= 0)
171                 free_irq(chip->irq, chip);
172         pci_release_regions(chip->pci);
173         pci_disable_device(chip->pci);
174         kfree(chip);
175         return 0;
176 }
177 
178 static int snd_als300_dev_free(struct snd_device *device)
179 {
180         struct snd_als300 *chip = device->device_data;
181         return snd_als300_free(chip);
182 }
183 
184 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
185 {
186         u8 status;
187         struct snd_als300 *chip = dev_id;
188         struct snd_als300_substream_data *data;
189 
190         status = inb(chip->port+ALS300_IRQ_STATUS);
191         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
192                 return IRQ_NONE;
193 
194         /* ACK everything ASAP */
195         outb(status, chip->port+ALS300_IRQ_STATUS);
196         if (status & IRQ_PLAYBACK) {
197                 if (chip->pcm && chip->playback_substream) {
198                         data = chip->playback_substream->runtime->private_data;
199                         data->period_flipflop ^= 1;
200                         snd_pcm_period_elapsed(chip->playback_substream);
201                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
202                 }
203         }
204         if (status & IRQ_CAPTURE) {
205                 if (chip->pcm && chip->capture_substream) {
206                         data = chip->capture_substream->runtime->private_data;
207                         data->period_flipflop ^= 1;
208                         snd_pcm_period_elapsed(chip->capture_substream);
209                         snd_als300_dbgplay("IRQ_CAPTURE\n");
210                 }
211         }
212         return IRQ_HANDLED;
213 }
214 
215 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
216 {
217         u8 general, mpu, dram;
218         struct snd_als300 *chip = dev_id;
219         struct snd_als300_substream_data *data;
220         
221         general = inb(chip->port+ALS300P_IRQ_STATUS);
222         mpu = inb(chip->port+MPU_IRQ_STATUS);
223         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
224 
225         /* shared IRQ, for different device?? Exit ASAP! */
226         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
227                 return IRQ_NONE;
228 
229         if (general & IRQ_PLAYBACK) {
230                 if (chip->pcm && chip->playback_substream) {
231                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
232                         data = chip->playback_substream->runtime->private_data;
233                         data->period_flipflop ^= 1;
234                         snd_pcm_period_elapsed(chip->playback_substream);
235                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
236                 }
237         }
238         if (general & IRQ_CAPTURE) {
239                 if (chip->pcm && chip->capture_substream) {
240                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
241                         data = chip->capture_substream->runtime->private_data;
242                         data->period_flipflop ^= 1;
243                         snd_pcm_period_elapsed(chip->capture_substream);
244                         snd_als300_dbgplay("IRQ_CAPTURE\n");
245                 }
246         }
247         /* FIXME: Ack other interrupt types. Not important right now as
248          * those other devices aren't enabled. */
249         return IRQ_HANDLED;
250 }
251 
252 static void snd_als300_remove(struct pci_dev *pci)
253 {
254         snd_card_free(pci_get_drvdata(pci));
255 }
256 
257 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
258                                                         unsigned short reg)
259 {
260         int i;
261         struct snd_als300 *chip = ac97->private_data;
262 
263         for (i = 0; i < 1000; i++) {
264                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
265                         break;
266                 udelay(10);
267         }
268         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
269 
270         for (i = 0; i < 1000; i++) {
271                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
272                         break;
273                 udelay(10);
274         }
275         return inw(chip->port+AC97_READ);
276 }
277 
278 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
279                                 unsigned short reg, unsigned short val)
280 {
281         int i;
282         struct snd_als300 *chip = ac97->private_data;
283 
284         for (i = 0; i < 1000; i++) {
285                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
286                         break;
287                 udelay(10);
288         }
289         outl((reg << 24) | val, chip->port+AC97_ACCESS);
290 }
291 
292 static int snd_als300_ac97(struct snd_als300 *chip)
293 {
294         struct snd_ac97_bus *bus;
295         struct snd_ac97_template ac97;
296         int err;
297         static struct snd_ac97_bus_ops ops = {
298                 .write = snd_als300_ac97_write,
299                 .read = snd_als300_ac97_read,
300         };
301 
302         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
303                 return err;
304 
305         memset(&ac97, 0, sizeof(ac97));
306         ac97.private_data = chip;
307 
308         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
309 }
310 
311 /* hardware definition
312  *
313  * In AC97 mode, we always use 48k/16bit/stereo.
314  * Any request to change data type is ignored by
315  * the card when it is running outside of legacy
316  * mode.
317  */
318 static const struct snd_pcm_hardware snd_als300_playback_hw =
319 {
320         .info =                 (SNDRV_PCM_INFO_MMAP |
321                                 SNDRV_PCM_INFO_INTERLEAVED |
322                                 SNDRV_PCM_INFO_PAUSE |
323                                 SNDRV_PCM_INFO_MMAP_VALID),
324         .formats =              SNDRV_PCM_FMTBIT_S16,
325         .rates =                SNDRV_PCM_RATE_48000,
326         .rate_min =             48000,
327         .rate_max =             48000,
328         .channels_min =         2,
329         .channels_max =         2,
330         .buffer_bytes_max =     64 * 1024,
331         .period_bytes_min =     64,
332         .period_bytes_max =     32 * 1024,
333         .periods_min =          2,
334         .periods_max =          2,
335 };
336 
337 static const struct snd_pcm_hardware snd_als300_capture_hw =
338 {
339         .info =                 (SNDRV_PCM_INFO_MMAP |
340                                 SNDRV_PCM_INFO_INTERLEAVED |
341                                 SNDRV_PCM_INFO_PAUSE |
342                                 SNDRV_PCM_INFO_MMAP_VALID),
343         .formats =              SNDRV_PCM_FMTBIT_S16,
344         .rates =                SNDRV_PCM_RATE_48000,
345         .rate_min =             48000,
346         .rate_max =             48000,
347         .channels_min =         2,
348         .channels_max =         2,
349         .buffer_bytes_max =     64 * 1024,
350         .period_bytes_min =     64,
351         .period_bytes_max =     32 * 1024,
352         .periods_min =          2,
353         .periods_max =          2,
354 };
355 
356 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
357 {
358         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
359         struct snd_pcm_runtime *runtime = substream->runtime;
360         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
361                                                                 GFP_KERNEL);
362 
363         if (!data)
364                 return -ENOMEM;
365         chip->playback_substream = substream;
366         runtime->hw = snd_als300_playback_hw;
367         runtime->private_data = data;
368         data->control_register = PLAYBACK_CONTROL;
369         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
370         return 0;
371 }
372 
373 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
374 {
375         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
376         struct snd_als300_substream_data *data;
377 
378         data = substream->runtime->private_data;
379         kfree(data);
380         chip->playback_substream = NULL;
381         snd_pcm_lib_free_pages(substream);
382         return 0;
383 }
384 
385 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
386 {
387         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
388         struct snd_pcm_runtime *runtime = substream->runtime;
389         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
390                                                                 GFP_KERNEL);
391 
392         if (!data)
393                 return -ENOMEM;
394         chip->capture_substream = substream;
395         runtime->hw = snd_als300_capture_hw;
396         runtime->private_data = data;
397         data->control_register = RECORD_CONTROL;
398         data->block_counter_register = RECORD_BLOCK_COUNTER;
399         return 0;
400 }
401 
402 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
403 {
404         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
405         struct snd_als300_substream_data *data;
406 
407         data = substream->runtime->private_data;
408         kfree(data);
409         chip->capture_substream = NULL;
410         snd_pcm_lib_free_pages(substream);
411         return 0;
412 }
413 
414 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
415                                     struct snd_pcm_hw_params *hw_params)
416 {
417         return snd_pcm_lib_malloc_pages(substream,
418                                         params_buffer_bytes(hw_params));
419 }
420 
421 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
422 {
423         return snd_pcm_lib_free_pages(substream);
424 }
425 
426 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
427 {
428         u32 tmp;
429         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
430         struct snd_pcm_runtime *runtime = substream->runtime;
431         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
432         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
433         
434         spin_lock_irq(&chip->reg_lock);
435         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
436         tmp &= ~TRANSFER_START;
437 
438         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
439                                                 period_bytes, buffer_bytes);
440         
441         /* set block size */
442         tmp &= 0xffff0000;
443         tmp |= period_bytes - 1;
444         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
445 
446         /* set dma area */
447         snd_als300_gcr_write(chip->port, PLAYBACK_START,
448                                         runtime->dma_addr);
449         snd_als300_gcr_write(chip->port, PLAYBACK_END,
450                                         runtime->dma_addr + buffer_bytes - 1);
451         spin_unlock_irq(&chip->reg_lock);
452         return 0;
453 }
454 
455 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
456 {
457         u32 tmp;
458         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
459         struct snd_pcm_runtime *runtime = substream->runtime;
460         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
461         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
462 
463         spin_lock_irq(&chip->reg_lock);
464         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
465         tmp &= ~TRANSFER_START;
466 
467         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
468                                                         buffer_bytes);
469 
470         /* set block size */
471         tmp &= 0xffff0000;
472         tmp |= period_bytes - 1;
473 
474         /* set dma area */
475         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
476         snd_als300_gcr_write(chip->port, RECORD_START,
477                                         runtime->dma_addr);
478         snd_als300_gcr_write(chip->port, RECORD_END,
479                                         runtime->dma_addr + buffer_bytes - 1);
480         spin_unlock_irq(&chip->reg_lock);
481         return 0;
482 }
483 
484 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
485 {
486         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
487         u32 tmp;
488         struct snd_als300_substream_data *data;
489         unsigned short reg;
490         int ret = 0;
491 
492         data = substream->runtime->private_data;
493         reg = data->control_register;
494 
495         spin_lock(&chip->reg_lock);
496         switch (cmd) {
497         case SNDRV_PCM_TRIGGER_START:
498         case SNDRV_PCM_TRIGGER_RESUME:
499                 tmp = snd_als300_gcr_read(chip->port, reg);
500                 data->period_flipflop = 1;
501                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
502                 snd_als300_dbgplay("TRIGGER START\n");
503                 break;
504         case SNDRV_PCM_TRIGGER_STOP:
505         case SNDRV_PCM_TRIGGER_SUSPEND:
506                 tmp = snd_als300_gcr_read(chip->port, reg);
507                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
508                 snd_als300_dbgplay("TRIGGER STOP\n");
509                 break;
510         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
511                 tmp = snd_als300_gcr_read(chip->port, reg);
512                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
513                 snd_als300_dbgplay("TRIGGER PAUSE\n");
514                 break;
515         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
516                 tmp = snd_als300_gcr_read(chip->port, reg);
517                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
518                 snd_als300_dbgplay("TRIGGER RELEASE\n");
519                 break;
520         default:
521                 snd_als300_dbgplay("TRIGGER INVALID\n");
522                 ret = -EINVAL;
523         }
524         spin_unlock(&chip->reg_lock);
525         return ret;
526 }
527 
528 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
529 {
530         u16 current_ptr;
531         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
532         struct snd_als300_substream_data *data;
533         unsigned short period_bytes;
534 
535         data = substream->runtime->private_data;
536         period_bytes = snd_pcm_lib_period_bytes(substream);
537         
538         spin_lock(&chip->reg_lock);
539         current_ptr = (u16) snd_als300_gcr_read(chip->port,
540                                         data->block_counter_register) + 4;
541         spin_unlock(&chip->reg_lock);
542         if (current_ptr > period_bytes)
543                 current_ptr = 0;
544         else
545                 current_ptr = period_bytes - current_ptr;
546 
547         if (data->period_flipflop == 0)
548                 current_ptr += period_bytes;
549         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
550         return bytes_to_frames(substream->runtime, current_ptr);
551 }
552 
553 static const struct snd_pcm_ops snd_als300_playback_ops = {
554         .open =         snd_als300_playback_open,
555         .close =        snd_als300_playback_close,
556         .ioctl =        snd_pcm_lib_ioctl,
557         .hw_params =    snd_als300_pcm_hw_params,
558         .hw_free =      snd_als300_pcm_hw_free,
559         .prepare =      snd_als300_playback_prepare,
560         .trigger =      snd_als300_trigger,
561         .pointer =      snd_als300_pointer,
562 };
563 
564 static const struct snd_pcm_ops snd_als300_capture_ops = {
565         .open =         snd_als300_capture_open,
566         .close =        snd_als300_capture_close,
567         .ioctl =        snd_pcm_lib_ioctl,
568         .hw_params =    snd_als300_pcm_hw_params,
569         .hw_free =      snd_als300_pcm_hw_free,
570         .prepare =      snd_als300_capture_prepare,
571         .trigger =      snd_als300_trigger,
572         .pointer =      snd_als300_pointer,
573 };
574 
575 static int snd_als300_new_pcm(struct snd_als300 *chip)
576 {
577         struct snd_pcm *pcm;
578         int err;
579 
580         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
581         if (err < 0)
582                 return err;
583         pcm->private_data = chip;
584         strcpy(pcm->name, "ALS300");
585         chip->pcm = pcm;
586 
587         /* set operators */
588         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
589                                 &snd_als300_playback_ops);
590         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
591                                 &snd_als300_capture_ops);
592 
593         /* pre-allocation of buffers */
594         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
595         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
596         return 0;
597 }
598 
599 static void snd_als300_init(struct snd_als300 *chip)
600 {
601         unsigned long flags;
602         u32 tmp;
603         
604         spin_lock_irqsave(&chip->reg_lock, flags);
605         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
606                                                                 & 0x0000000F;
607         /* Setup DRAM */
608         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
609         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
610                                                 (tmp | DRAM_MODE_2)
611                                                 & ~WRITE_TRANS_START);
612 
613         /* Enable IRQ output */
614         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
615 
616         /* Unmute hardware devices so their outputs get routed to
617          * the onboard mixer */
618         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
619         snd_als300_gcr_write(chip->port, MISC_CONTROL,
620                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
621 
622         /* Reset volumes */
623         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
624 
625         /* Make sure playback transfer is stopped */
626         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
627         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
628                         tmp & ~TRANSFER_START);
629         spin_unlock_irqrestore(&chip->reg_lock, flags);
630 }
631 
632 static int snd_als300_create(struct snd_card *card,
633                              struct pci_dev *pci, int chip_type,
634                              struct snd_als300 **rchip)
635 {
636         struct snd_als300 *chip;
637         void *irq_handler;
638         int err;
639 
640         static struct snd_device_ops ops = {
641                 .dev_free = snd_als300_dev_free,
642         };
643         *rchip = NULL;
644 
645         if ((err = pci_enable_device(pci)) < 0)
646                 return err;
647 
648         if (dma_set_mask(&pci->dev, DMA_BIT_MASK(28)) < 0 ||
649                 dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(28)) < 0) {
650                 dev_err(card->dev, "error setting 28bit DMA mask\n");
651                 pci_disable_device(pci);
652                 return -ENXIO;
653         }
654         pci_set_master(pci);
655 
656         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
657         if (chip == NULL) {
658                 pci_disable_device(pci);
659                 return -ENOMEM;
660         }
661 
662         chip->card = card;
663         chip->pci = pci;
664         chip->irq = -1;
665         chip->chip_type = chip_type;
666         spin_lock_init(&chip->reg_lock);
667 
668         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
669                 kfree(chip);
670                 pci_disable_device(pci);
671                 return err;
672         }
673         chip->port = pci_resource_start(pci, 0);
674 
675         if (chip->chip_type == DEVICE_ALS300_PLUS)
676                 irq_handler = snd_als300plus_interrupt;
677         else
678                 irq_handler = snd_als300_interrupt;
679 
680         if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
681                         KBUILD_MODNAME, chip)) {
682                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
683                 snd_als300_free(chip);
684                 return -EBUSY;
685         }
686         chip->irq = pci->irq;
687 
688 
689         snd_als300_init(chip);
690 
691         err = snd_als300_ac97(chip);
692         if (err < 0) {
693                 dev_err(card->dev, "Could not create ac97\n");
694                 snd_als300_free(chip);
695                 return err;
696         }
697 
698         if ((err = snd_als300_new_pcm(chip)) < 0) {
699                 dev_err(card->dev, "Could not create PCM\n");
700                 snd_als300_free(chip);
701                 return err;
702         }
703 
704         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
705                                                 chip, &ops)) < 0) {
706                 snd_als300_free(chip);
707                 return err;
708         }
709 
710         *rchip = chip;
711         return 0;
712 }
713 
714 #ifdef CONFIG_PM_SLEEP
715 static int snd_als300_suspend(struct device *dev)
716 {
717         struct snd_card *card = dev_get_drvdata(dev);
718         struct snd_als300 *chip = card->private_data;
719 
720         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
721         snd_ac97_suspend(chip->ac97);
722         return 0;
723 }
724 
725 static int snd_als300_resume(struct device *dev)
726 {
727         struct snd_card *card = dev_get_drvdata(dev);
728         struct snd_als300 *chip = card->private_data;
729 
730         snd_als300_init(chip);
731         snd_ac97_resume(chip->ac97);
732 
733         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
734         return 0;
735 }
736 
737 static SIMPLE_DEV_PM_OPS(snd_als300_pm, snd_als300_suspend, snd_als300_resume);
738 #define SND_ALS300_PM_OPS       &snd_als300_pm
739 #else
740 #define SND_ALS300_PM_OPS       NULL
741 #endif
742 
743 static int snd_als300_probe(struct pci_dev *pci,
744                              const struct pci_device_id *pci_id)
745 {
746         static int dev;
747         struct snd_card *card;
748         struct snd_als300 *chip;
749         int err, chip_type;
750 
751         if (dev >= SNDRV_CARDS)
752                 return -ENODEV;
753         if (!enable[dev]) {
754                 dev++;
755                 return -ENOENT;
756         }
757 
758         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
759                            0, &card);
760 
761         if (err < 0)
762                 return err;
763 
764         chip_type = pci_id->driver_data;
765 
766         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
767                 snd_card_free(card);
768                 return err;
769         }
770         card->private_data = chip;
771 
772         strcpy(card->driver, "ALS300");
773         if (chip->chip_type == DEVICE_ALS300_PLUS)
774                 /* don't know much about ALS300+ yet
775                  * print revision number for now */
776                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
777         else
778                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
779                                                         chip->revision - 1);
780         sprintf(card->longname, "%s at 0x%lx irq %i",
781                                 card->shortname, chip->port, chip->irq);
782 
783         if ((err = snd_card_register(card)) < 0) {
784                 snd_card_free(card);
785                 return err;
786         }
787         pci_set_drvdata(pci, card);
788         dev++;
789         return 0;
790 }
791 
792 static struct pci_driver als300_driver = {
793         .name = KBUILD_MODNAME,
794         .id_table = snd_als300_ids,
795         .probe = snd_als300_probe,
796         .remove = snd_als300_remove,
797         .driver = {
798                 .pm = SND_ALS300_PM_OPS,
799         },
800 };
801 
802 module_pci_driver(als300_driver);
803 

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