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

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  1 /*
  2  *  als300.c - driver for Avance Logic ALS300/ALS300+ soundcards.
  3  *  Copyright (C) 2005 by Ash Willis <ashwillis@programmer.net>
  4  *
  5  *  This program is free software; you can redistribute it and/or modify
  6  *  it under the terms of the GNU General Public License as published by
  7  *  the Free Software Foundation; either version 2 of the License, or
  8  *  (at your option) any later version.
  9  *
 10  *  This program is distributed in the hope that it will be useful,
 11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  *  GNU General Public License for more details.
 14  *
 15  *  You should have received a copy of the GNU General Public License
 16  *  along with this program; if not, write to the Free Software
 17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 18  *
 19  *  TODO
 20  *  4 channel playback for ALS300+
 21  *  gameport
 22  *  mpu401
 23  *  opl3
 24  *
 25  *  NOTES
 26  *  The BLOCK_COUNTER registers for the ALS300(+) return a figure related to
 27  *  the position in the current period, NOT the whole buffer. It is important
 28  *  to know which period we are in so we can calculate the correct pointer.
 29  *  This is why we always use 2 periods. We can then use a flip-flop variable
 30  *  to keep track of what period we are in.
 31  */
 32 
 33 #include <linux/delay.h>
 34 #include <linux/init.h>
 35 #include <linux/module.h>
 36 #include <linux/pci.h>
 37 #include <linux/dma-mapping.h>
 38 #include <linux/interrupt.h>
 39 #include <linux/slab.h>
 40 
 41 #include <asm/io.h>
 42 
 43 #include <sound/core.h>
 44 #include <sound/control.h>
 45 #include <sound/initval.h>
 46 #include <sound/pcm.h>
 47 #include <sound/pcm_params.h>
 48 #include <sound/ac97_codec.h>
 49 #include <sound/opl3.h>
 50 
 51 /* snd_als300_set_irq_flag */
 52 #define IRQ_DISABLE             0
 53 #define IRQ_ENABLE              1
 54 
 55 /* I/O port layout */
 56 #define AC97_ACCESS             0x00
 57 #define AC97_READ               0x04
 58 #define AC97_STATUS             0x06
 59 #define   AC97_DATA_AVAIL               (1<<6)
 60 #define   AC97_BUSY                     (1<<7)
 61 #define ALS300_IRQ_STATUS       0x07            /* ALS300 Only */
 62 #define   IRQ_PLAYBACK                  (1<<3)
 63 #define   IRQ_CAPTURE                   (1<<2)
 64 #define GCR_DATA                0x08
 65 #define GCR_INDEX               0x0C
 66 #define ALS300P_DRAM_IRQ_STATUS 0x0D            /* ALS300+ Only */
 67 #define MPU_IRQ_STATUS          0x0E            /* ALS300 Rev. E+, ALS300+ */
 68 #define ALS300P_IRQ_STATUS      0x0F            /* ALS300+ Only */
 69 
 70 /* General Control Registers */
 71 #define PLAYBACK_START          0x80
 72 #define PLAYBACK_END            0x81
 73 #define PLAYBACK_CONTROL        0x82
 74 #define   TRANSFER_START                (1<<16)
 75 #define   FIFO_PAUSE                    (1<<17)
 76 #define RECORD_START            0x83
 77 #define RECORD_END              0x84
 78 #define RECORD_CONTROL          0x85
 79 #define DRAM_WRITE_CONTROL      0x8B
 80 #define   WRITE_TRANS_START             (1<<16)
 81 #define   DRAM_MODE_2                   (1<<17)
 82 #define MISC_CONTROL            0x8C
 83 #define   IRQ_SET_BIT                   (1<<15)
 84 #define   VMUTE_NORMAL                  (1<<20)
 85 #define   MMUTE_NORMAL                  (1<<21)
 86 #define MUS_VOC_VOL             0x8E
 87 #define PLAYBACK_BLOCK_COUNTER  0x9A
 88 #define RECORD_BLOCK_COUNTER    0x9B
 89 
 90 #define DEBUG_CALLS     0
 91 #define DEBUG_PLAY_REC  0
 92 
 93 #if DEBUG_CALLS
 94 #define snd_als300_dbgcalls(format, args...) printk(KERN_DEBUG format, ##args)
 95 #define snd_als300_dbgcallenter() printk(KERN_ERR "--> %s\n", __func__)
 96 #define snd_als300_dbgcallleave() printk(KERN_ERR "<-- %s\n", __func__)
 97 #else
 98 #define snd_als300_dbgcalls(format, args...)
 99 #define snd_als300_dbgcallenter()
100 #define snd_als300_dbgcallleave()
101 #endif
102 
103 #if DEBUG_PLAY_REC
104 #define snd_als300_dbgplay(format, args...) printk(KERN_ERR format, ##args)
105 #else
106 #define snd_als300_dbgplay(format, args...)
107 #endif          
108 
109 enum {DEVICE_ALS300, DEVICE_ALS300_PLUS};
110 
111 MODULE_AUTHOR("Ash Willis <ashwillis@programmer.net>");
112 MODULE_DESCRIPTION("Avance Logic ALS300");
113 MODULE_LICENSE("GPL");
114 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS300},{Avance Logic,ALS300+}}");
115 
116 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
117 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
118 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
119 
120 module_param_array(index, int, NULL, 0444);
121 MODULE_PARM_DESC(index, "Index value for ALS300 sound card.");
122 module_param_array(id, charp, NULL, 0444);
123 MODULE_PARM_DESC(id, "ID string for ALS300 sound card.");
124 module_param_array(enable, bool, NULL, 0444);
125 MODULE_PARM_DESC(enable, "Enable ALS300 sound card.");
126 
127 struct snd_als300 {
128         unsigned long port;
129         spinlock_t reg_lock;
130         struct snd_card *card;
131         struct pci_dev *pci;
132 
133         struct snd_pcm *pcm;
134         struct snd_pcm_substream *playback_substream;
135         struct snd_pcm_substream *capture_substream;
136 
137         struct snd_ac97 *ac97;
138         struct snd_opl3 *opl3;
139 
140         struct resource *res_port;
141 
142         int irq;
143 
144         int chip_type; /* ALS300 or ALS300+ */
145 
146         char revision;  
147 };
148 
149 struct snd_als300_substream_data {
150         int period_flipflop;
151         int control_register;
152         int block_counter_register;
153 };
154 
155 static DEFINE_PCI_DEVICE_TABLE(snd_als300_ids) = {
156         { 0x4005, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300 },
157         { 0x4005, 0x0308, PCI_ANY_ID, PCI_ANY_ID, 0, 0, DEVICE_ALS300_PLUS },
158         { 0, }
159 };
160 
161 MODULE_DEVICE_TABLE(pci, snd_als300_ids);
162 
163 static inline u32 snd_als300_gcr_read(unsigned long port, unsigned short reg)
164 {
165         outb(reg, port+GCR_INDEX);
166         return inl(port+GCR_DATA);
167 }
168 
169 static inline void snd_als300_gcr_write(unsigned long port,
170                                                 unsigned short reg, u32 val)
171 {
172         outb(reg, port+GCR_INDEX);
173         outl(val, port+GCR_DATA);
174 }
175 
176 /* Enable/Disable Interrupts */
177 static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
178 {
179         u32 tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
180         snd_als300_dbgcallenter();
181 
182         /* boolean XOR check, since old vs. new hardware have
183            directly reversed bit setting for ENABLE and DISABLE.
184            ALS300+ acts like newer versions of ALS300 */
185         if (((chip->revision > 5 || chip->chip_type == DEVICE_ALS300_PLUS) ^
186                                                 (cmd == IRQ_ENABLE)) == 0)
187                 tmp |= IRQ_SET_BIT;
188         else
189                 tmp &= ~IRQ_SET_BIT;
190         snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
191         snd_als300_dbgcallleave();
192 }
193 
194 static int snd_als300_free(struct snd_als300 *chip)
195 {
196         snd_als300_dbgcallenter();
197         snd_als300_set_irq_flag(chip, IRQ_DISABLE);
198         if (chip->irq >= 0)
199                 free_irq(chip->irq, chip);
200         pci_release_regions(chip->pci);
201         pci_disable_device(chip->pci);
202         kfree(chip);
203         snd_als300_dbgcallleave();
204         return 0;
205 }
206 
207 static int snd_als300_dev_free(struct snd_device *device)
208 {
209         struct snd_als300 *chip = device->device_data;
210         return snd_als300_free(chip);
211 }
212 
213 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
214 {
215         u8 status;
216         struct snd_als300 *chip = dev_id;
217         struct snd_als300_substream_data *data;
218 
219         status = inb(chip->port+ALS300_IRQ_STATUS);
220         if (!status) /* shared IRQ, for different device?? Exit ASAP! */
221                 return IRQ_NONE;
222 
223         /* ACK everything ASAP */
224         outb(status, chip->port+ALS300_IRQ_STATUS);
225         if (status & IRQ_PLAYBACK) {
226                 if (chip->pcm && chip->playback_substream) {
227                         data = chip->playback_substream->runtime->private_data;
228                         data->period_flipflop ^= 1;
229                         snd_pcm_period_elapsed(chip->playback_substream);
230                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
231                 }
232         }
233         if (status & IRQ_CAPTURE) {
234                 if (chip->pcm && chip->capture_substream) {
235                         data = chip->capture_substream->runtime->private_data;
236                         data->period_flipflop ^= 1;
237                         snd_pcm_period_elapsed(chip->capture_substream);
238                         snd_als300_dbgplay("IRQ_CAPTURE\n");
239                 }
240         }
241         return IRQ_HANDLED;
242 }
243 
244 static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
245 {
246         u8 general, mpu, dram;
247         struct snd_als300 *chip = dev_id;
248         struct snd_als300_substream_data *data;
249         
250         general = inb(chip->port+ALS300P_IRQ_STATUS);
251         mpu = inb(chip->port+MPU_IRQ_STATUS);
252         dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
253 
254         /* shared IRQ, for different device?? Exit ASAP! */
255         if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
256                 return IRQ_NONE;
257 
258         if (general & IRQ_PLAYBACK) {
259                 if (chip->pcm && chip->playback_substream) {
260                         outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
261                         data = chip->playback_substream->runtime->private_data;
262                         data->period_flipflop ^= 1;
263                         snd_pcm_period_elapsed(chip->playback_substream);
264                         snd_als300_dbgplay("IRQ_PLAYBACK\n");
265                 }
266         }
267         if (general & IRQ_CAPTURE) {
268                 if (chip->pcm && chip->capture_substream) {
269                         outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
270                         data = chip->capture_substream->runtime->private_data;
271                         data->period_flipflop ^= 1;
272                         snd_pcm_period_elapsed(chip->capture_substream);
273                         snd_als300_dbgplay("IRQ_CAPTURE\n");
274                 }
275         }
276         /* FIXME: Ack other interrupt types. Not important right now as
277          * those other devices aren't enabled. */
278         return IRQ_HANDLED;
279 }
280 
281 static void __devexit snd_als300_remove(struct pci_dev *pci)
282 {
283         snd_als300_dbgcallenter();
284         snd_card_free(pci_get_drvdata(pci));
285         pci_set_drvdata(pci, NULL);
286         snd_als300_dbgcallleave();
287 }
288 
289 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
290                                                         unsigned short reg)
291 {
292         int i;
293         struct snd_als300 *chip = ac97->private_data;
294 
295         for (i = 0; i < 1000; i++) {
296                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
297                         break;
298                 udelay(10);
299         }
300         outl((reg << 24) | (1 << 31), chip->port+AC97_ACCESS);
301 
302         for (i = 0; i < 1000; i++) {
303                 if ((inb(chip->port+AC97_STATUS) & (AC97_DATA_AVAIL)) != 0)
304                         break;
305                 udelay(10);
306         }
307         return inw(chip->port+AC97_READ);
308 }
309 
310 static void snd_als300_ac97_write(struct snd_ac97 *ac97,
311                                 unsigned short reg, unsigned short val)
312 {
313         int i;
314         struct snd_als300 *chip = ac97->private_data;
315 
316         for (i = 0; i < 1000; i++) {
317                 if ((inb(chip->port+AC97_STATUS) & (AC97_BUSY)) == 0)
318                         break;
319                 udelay(10);
320         }
321         outl((reg << 24) | val, chip->port+AC97_ACCESS);
322 }
323 
324 static int snd_als300_ac97(struct snd_als300 *chip)
325 {
326         struct snd_ac97_bus *bus;
327         struct snd_ac97_template ac97;
328         int err;
329         static struct snd_ac97_bus_ops ops = {
330                 .write = snd_als300_ac97_write,
331                 .read = snd_als300_ac97_read,
332         };
333 
334         snd_als300_dbgcallenter();
335         if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &bus)) < 0)
336                 return err;
337 
338         memset(&ac97, 0, sizeof(ac97));
339         ac97.private_data = chip;
340 
341         snd_als300_dbgcallleave();
342         return snd_ac97_mixer(bus, &ac97, &chip->ac97);
343 }
344 
345 /* hardware definition
346  *
347  * In AC97 mode, we always use 48k/16bit/stereo.
348  * Any request to change data type is ignored by
349  * the card when it is running outside of legacy
350  * mode.
351  */
352 static struct snd_pcm_hardware snd_als300_playback_hw =
353 {
354         .info =                 (SNDRV_PCM_INFO_MMAP |
355                                 SNDRV_PCM_INFO_INTERLEAVED |
356                                 SNDRV_PCM_INFO_PAUSE |
357                                 SNDRV_PCM_INFO_MMAP_VALID),
358         .formats =              SNDRV_PCM_FMTBIT_S16,
359         .rates =                SNDRV_PCM_RATE_48000,
360         .rate_min =             48000,
361         .rate_max =             48000,
362         .channels_min =         2,
363         .channels_max =         2,
364         .buffer_bytes_max =     64 * 1024,
365         .period_bytes_min =     64,
366         .period_bytes_max =     32 * 1024,
367         .periods_min =          2,
368         .periods_max =          2,
369 };
370 
371 static struct snd_pcm_hardware snd_als300_capture_hw =
372 {
373         .info =                 (SNDRV_PCM_INFO_MMAP |
374                                 SNDRV_PCM_INFO_INTERLEAVED |
375                                 SNDRV_PCM_INFO_PAUSE |
376                                 SNDRV_PCM_INFO_MMAP_VALID),
377         .formats =              SNDRV_PCM_FMTBIT_S16,
378         .rates =                SNDRV_PCM_RATE_48000,
379         .rate_min =             48000,
380         .rate_max =             48000,
381         .channels_min =         2,
382         .channels_max =         2,
383         .buffer_bytes_max =     64 * 1024,
384         .period_bytes_min =     64,
385         .period_bytes_max =     32 * 1024,
386         .periods_min =          2,
387         .periods_max =          2,
388 };
389 
390 static int snd_als300_playback_open(struct snd_pcm_substream *substream)
391 {
392         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
393         struct snd_pcm_runtime *runtime = substream->runtime;
394         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
395                                                                 GFP_KERNEL);
396 
397         snd_als300_dbgcallenter();
398         chip->playback_substream = substream;
399         runtime->hw = snd_als300_playback_hw;
400         runtime->private_data = data;
401         data->control_register = PLAYBACK_CONTROL;
402         data->block_counter_register = PLAYBACK_BLOCK_COUNTER;
403         snd_als300_dbgcallleave();
404         return 0;
405 }
406 
407 static int snd_als300_playback_close(struct snd_pcm_substream *substream)
408 {
409         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
410         struct snd_als300_substream_data *data;
411 
412         data = substream->runtime->private_data;
413         snd_als300_dbgcallenter();
414         kfree(data);
415         chip->playback_substream = NULL;
416         snd_pcm_lib_free_pages(substream);
417         snd_als300_dbgcallleave();
418         return 0;
419 }
420 
421 static int snd_als300_capture_open(struct snd_pcm_substream *substream)
422 {
423         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
424         struct snd_pcm_runtime *runtime = substream->runtime;
425         struct snd_als300_substream_data *data = kzalloc(sizeof(*data),
426                                                                 GFP_KERNEL);
427 
428         snd_als300_dbgcallenter();
429         chip->capture_substream = substream;
430         runtime->hw = snd_als300_capture_hw;
431         runtime->private_data = data;
432         data->control_register = RECORD_CONTROL;
433         data->block_counter_register = RECORD_BLOCK_COUNTER;
434         snd_als300_dbgcallleave();
435         return 0;
436 }
437 
438 static int snd_als300_capture_close(struct snd_pcm_substream *substream)
439 {
440         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
441         struct snd_als300_substream_data *data;
442 
443         data = substream->runtime->private_data;
444         snd_als300_dbgcallenter();
445         kfree(data);
446         chip->capture_substream = NULL;
447         snd_pcm_lib_free_pages(substream);
448         snd_als300_dbgcallleave();
449         return 0;
450 }
451 
452 static int snd_als300_pcm_hw_params(struct snd_pcm_substream *substream,
453                                     struct snd_pcm_hw_params *hw_params)
454 {
455         return snd_pcm_lib_malloc_pages(substream,
456                                         params_buffer_bytes(hw_params));
457 }
458 
459 static int snd_als300_pcm_hw_free(struct snd_pcm_substream *substream)
460 {
461         return snd_pcm_lib_free_pages(substream);
462 }
463 
464 static int snd_als300_playback_prepare(struct snd_pcm_substream *substream)
465 {
466         u32 tmp;
467         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
468         struct snd_pcm_runtime *runtime = substream->runtime;
469         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
470         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
471         
472         snd_als300_dbgcallenter();
473         spin_lock_irq(&chip->reg_lock);
474         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
475         tmp &= ~TRANSFER_START;
476 
477         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n",
478                                                 period_bytes, buffer_bytes);
479         
480         /* set block size */
481         tmp &= 0xffff0000;
482         tmp |= period_bytes - 1;
483         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL, tmp);
484 
485         /* set dma area */
486         snd_als300_gcr_write(chip->port, PLAYBACK_START,
487                                         runtime->dma_addr);
488         snd_als300_gcr_write(chip->port, PLAYBACK_END,
489                                         runtime->dma_addr + buffer_bytes - 1);
490         spin_unlock_irq(&chip->reg_lock);
491         snd_als300_dbgcallleave();
492         return 0;
493 }
494 
495 static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
496 {
497         u32 tmp;
498         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
499         struct snd_pcm_runtime *runtime = substream->runtime;
500         unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
501         unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
502 
503         snd_als300_dbgcallenter();
504         spin_lock_irq(&chip->reg_lock);
505         tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
506         tmp &= ~TRANSFER_START;
507 
508         snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
509                                                         buffer_bytes);
510 
511         /* set block size */
512         tmp &= 0xffff0000;
513         tmp |= period_bytes - 1;
514 
515         /* set dma area */
516         snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
517         snd_als300_gcr_write(chip->port, RECORD_START,
518                                         runtime->dma_addr);
519         snd_als300_gcr_write(chip->port, RECORD_END,
520                                         runtime->dma_addr + buffer_bytes - 1);
521         spin_unlock_irq(&chip->reg_lock);
522         snd_als300_dbgcallleave();
523         return 0;
524 }
525 
526 static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
527 {
528         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
529         u32 tmp;
530         struct snd_als300_substream_data *data;
531         unsigned short reg;
532         int ret = 0;
533 
534         data = substream->runtime->private_data;
535         reg = data->control_register;
536 
537         snd_als300_dbgcallenter();
538         spin_lock(&chip->reg_lock);
539         switch (cmd) {
540         case SNDRV_PCM_TRIGGER_START:
541         case SNDRV_PCM_TRIGGER_RESUME:
542                 tmp = snd_als300_gcr_read(chip->port, reg);
543                 data->period_flipflop = 1;
544                 snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
545                 snd_als300_dbgplay("TRIGGER START\n");
546                 break;
547         case SNDRV_PCM_TRIGGER_STOP:
548         case SNDRV_PCM_TRIGGER_SUSPEND:
549                 tmp = snd_als300_gcr_read(chip->port, reg);
550                 snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
551                 snd_als300_dbgplay("TRIGGER STOP\n");
552                 break;
553         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
554                 tmp = snd_als300_gcr_read(chip->port, reg);
555                 snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
556                 snd_als300_dbgplay("TRIGGER PAUSE\n");
557                 break;
558         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
559                 tmp = snd_als300_gcr_read(chip->port, reg);
560                 snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
561                 snd_als300_dbgplay("TRIGGER RELEASE\n");
562                 break;
563         default:
564                 snd_als300_dbgplay("TRIGGER INVALID\n");
565                 ret = -EINVAL;
566         }
567         spin_unlock(&chip->reg_lock);
568         snd_als300_dbgcallleave();
569         return ret;
570 }
571 
572 static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
573 {
574         u16 current_ptr;
575         struct snd_als300 *chip = snd_pcm_substream_chip(substream);
576         struct snd_als300_substream_data *data;
577         unsigned short period_bytes;
578 
579         data = substream->runtime->private_data;
580         period_bytes = snd_pcm_lib_period_bytes(substream);
581         
582         snd_als300_dbgcallenter();
583         spin_lock(&chip->reg_lock);
584         current_ptr = (u16) snd_als300_gcr_read(chip->port,
585                                         data->block_counter_register) + 4;
586         spin_unlock(&chip->reg_lock);
587         if (current_ptr > period_bytes)
588                 current_ptr = 0;
589         else
590                 current_ptr = period_bytes - current_ptr;
591 
592         if (data->period_flipflop == 0)
593                 current_ptr += period_bytes;
594         snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
595         snd_als300_dbgcallleave();
596         return bytes_to_frames(substream->runtime, current_ptr);
597 }
598 
599 static struct snd_pcm_ops snd_als300_playback_ops = {
600         .open =         snd_als300_playback_open,
601         .close =        snd_als300_playback_close,
602         .ioctl =        snd_pcm_lib_ioctl,
603         .hw_params =    snd_als300_pcm_hw_params,
604         .hw_free =      snd_als300_pcm_hw_free,
605         .prepare =      snd_als300_playback_prepare,
606         .trigger =      snd_als300_trigger,
607         .pointer =      snd_als300_pointer,
608 };
609 
610 static struct snd_pcm_ops snd_als300_capture_ops = {
611         .open =         snd_als300_capture_open,
612         .close =        snd_als300_capture_close,
613         .ioctl =        snd_pcm_lib_ioctl,
614         .hw_params =    snd_als300_pcm_hw_params,
615         .hw_free =      snd_als300_pcm_hw_free,
616         .prepare =      snd_als300_capture_prepare,
617         .trigger =      snd_als300_trigger,
618         .pointer =      snd_als300_pointer,
619 };
620 
621 static int __devinit snd_als300_new_pcm(struct snd_als300 *chip)
622 {
623         struct snd_pcm *pcm;
624         int err;
625 
626         snd_als300_dbgcallenter();
627         err = snd_pcm_new(chip->card, "ALS300", 0, 1, 1, &pcm);
628         if (err < 0)
629                 return err;
630         pcm->private_data = chip;
631         strcpy(pcm->name, "ALS300");
632         chip->pcm = pcm;
633 
634         /* set operators */
635         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
636                                 &snd_als300_playback_ops);
637         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
638                                 &snd_als300_capture_ops);
639 
640         /* pre-allocation of buffers */
641         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
642         snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
643         snd_als300_dbgcallleave();
644         return 0;
645 }
646 
647 static void snd_als300_init(struct snd_als300 *chip)
648 {
649         unsigned long flags;
650         u32 tmp;
651         
652         snd_als300_dbgcallenter();
653         spin_lock_irqsave(&chip->reg_lock, flags);
654         chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
655                                                                 & 0x0000000F;
656         /* Setup DRAM */
657         tmp = snd_als300_gcr_read(chip->port, DRAM_WRITE_CONTROL);
658         snd_als300_gcr_write(chip->port, DRAM_WRITE_CONTROL,
659                                                 (tmp | DRAM_MODE_2)
660                                                 & ~WRITE_TRANS_START);
661 
662         /* Enable IRQ output */
663         snd_als300_set_irq_flag(chip, IRQ_ENABLE);
664 
665         /* Unmute hardware devices so their outputs get routed to
666          * the onboard mixer */
667         tmp = snd_als300_gcr_read(chip->port, MISC_CONTROL);
668         snd_als300_gcr_write(chip->port, MISC_CONTROL,
669                         tmp | VMUTE_NORMAL | MMUTE_NORMAL);
670 
671         /* Reset volumes */
672         snd_als300_gcr_write(chip->port, MUS_VOC_VOL, 0);
673 
674         /* Make sure playback transfer is stopped */
675         tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
676         snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
677                         tmp & ~TRANSFER_START);
678         spin_unlock_irqrestore(&chip->reg_lock, flags);
679         snd_als300_dbgcallleave();
680 }
681 
682 static int __devinit snd_als300_create(struct snd_card *card,
683                                        struct pci_dev *pci, int chip_type,
684                                        struct snd_als300 **rchip)
685 {
686         struct snd_als300 *chip;
687         void *irq_handler;
688         int err;
689 
690         static struct snd_device_ops ops = {
691                 .dev_free = snd_als300_dev_free,
692         };
693         *rchip = NULL;
694 
695         snd_als300_dbgcallenter();
696         if ((err = pci_enable_device(pci)) < 0)
697                 return err;
698 
699         if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
700                 pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
701                 printk(KERN_ERR "error setting 28bit DMA mask\n");
702                 pci_disable_device(pci);
703                 return -ENXIO;
704         }
705         pci_set_master(pci);
706 
707         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
708         if (chip == NULL) {
709                 pci_disable_device(pci);
710                 return -ENOMEM;
711         }
712 
713         chip->card = card;
714         chip->pci = pci;
715         chip->irq = -1;
716         chip->chip_type = chip_type;
717         spin_lock_init(&chip->reg_lock);
718 
719         if ((err = pci_request_regions(pci, "ALS300")) < 0) {
720                 kfree(chip);
721                 pci_disable_device(pci);
722                 return err;
723         }
724         chip->port = pci_resource_start(pci, 0);
725 
726         if (chip->chip_type == DEVICE_ALS300_PLUS)
727                 irq_handler = snd_als300plus_interrupt;
728         else
729                 irq_handler = snd_als300_interrupt;
730 
731         if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
732                         KBUILD_MODNAME, chip)) {
733                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
734                 snd_als300_free(chip);
735                 return -EBUSY;
736         }
737         chip->irq = pci->irq;
738 
739 
740         snd_als300_init(chip);
741 
742         err = snd_als300_ac97(chip);
743         if (err < 0) {
744                 snd_printk(KERN_WARNING "Could not create ac97\n");
745                 snd_als300_free(chip);
746                 return err;
747         }
748 
749         if ((err = snd_als300_new_pcm(chip)) < 0) {
750                 snd_printk(KERN_WARNING "Could not create PCM\n");
751                 snd_als300_free(chip);
752                 return err;
753         }
754 
755         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
756                                                 chip, &ops)) < 0) {
757                 snd_als300_free(chip);
758                 return err;
759         }
760 
761         snd_card_set_dev(card, &pci->dev);
762 
763         *rchip = chip;
764         snd_als300_dbgcallleave();
765         return 0;
766 }
767 
768 #ifdef CONFIG_PM
769 static int snd_als300_suspend(struct pci_dev *pci, pm_message_t state)
770 {
771         struct snd_card *card = pci_get_drvdata(pci);
772         struct snd_als300 *chip = card->private_data;
773 
774         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
775         snd_pcm_suspend_all(chip->pcm);
776         snd_ac97_suspend(chip->ac97);
777 
778         pci_disable_device(pci);
779         pci_save_state(pci);
780         pci_set_power_state(pci, pci_choose_state(pci, state));
781         return 0;
782 }
783 
784 static int snd_als300_resume(struct pci_dev *pci)
785 {
786         struct snd_card *card = pci_get_drvdata(pci);
787         struct snd_als300 *chip = card->private_data;
788 
789         pci_set_power_state(pci, PCI_D0);
790         pci_restore_state(pci);
791         if (pci_enable_device(pci) < 0) {
792                 printk(KERN_ERR "als300: pci_enable_device failed, "
793                        "disabling device\n");
794                 snd_card_disconnect(card);
795                 return -EIO;
796         }
797         pci_set_master(pci);
798 
799         snd_als300_init(chip);
800         snd_ac97_resume(chip->ac97);
801 
802         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
803         return 0;
804 }
805 #endif
806 
807 static int __devinit snd_als300_probe(struct pci_dev *pci,
808                              const struct pci_device_id *pci_id)
809 {
810         static int dev;
811         struct snd_card *card;
812         struct snd_als300 *chip;
813         int err, chip_type;
814 
815         if (dev >= SNDRV_CARDS)
816                 return -ENODEV;
817         if (!enable[dev]) {
818                 dev++;
819                 return -ENOENT;
820         }
821 
822         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
823 
824         if (err < 0)
825                 return err;
826 
827         chip_type = pci_id->driver_data;
828 
829         if ((err = snd_als300_create(card, pci, chip_type, &chip)) < 0) {
830                 snd_card_free(card);
831                 return err;
832         }
833         card->private_data = chip;
834 
835         strcpy(card->driver, "ALS300");
836         if (chip->chip_type == DEVICE_ALS300_PLUS)
837                 /* don't know much about ALS300+ yet
838                  * print revision number for now */
839                 sprintf(card->shortname, "ALS300+ (Rev. %d)", chip->revision);
840         else
841                 sprintf(card->shortname, "ALS300 (Rev. %c)", 'A' +
842                                                         chip->revision - 1);
843         sprintf(card->longname, "%s at 0x%lx irq %i",
844                                 card->shortname, chip->port, chip->irq);
845 
846         if ((err = snd_card_register(card)) < 0) {
847                 snd_card_free(card);
848                 return err;
849         }
850         pci_set_drvdata(pci, card);
851         dev++;
852         return 0;
853 }
854 
855 static struct pci_driver driver = {
856         .name = KBUILD_MODNAME,
857         .id_table = snd_als300_ids,
858         .probe = snd_als300_probe,
859         .remove = __devexit_p(snd_als300_remove),
860 #ifdef CONFIG_PM
861         .suspend = snd_als300_suspend,
862         .resume = snd_als300_resume,
863 #endif
864 };
865 
866 static int __init alsa_card_als300_init(void)
867 {
868         return pci_register_driver(&driver);
869 }
870 
871 static void __exit alsa_card_als300_exit(void)
872 {
873         pci_unregister_driver(&driver);
874 }
875 
876 module_init(alsa_card_als300_init)
877 module_exit(alsa_card_als300_exit)
878 

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