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1/*
2 * Driver for the Conexant CX25821 PCIe bridge
3 *
4 * Copyright (C) 2009 Conexant Systems Inc.
5 * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
6 * Based on SAA713x ALSA driver and CX88 driver
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, version 2
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/device.h>
28#include <linux/interrupt.h>
29#include <linux/vmalloc.h>
30#include <linux/dma-mapping.h>
31#include <linux/pci.h>
32#include <linux/slab.h>
33
34#include <linux/delay.h>
35#include <sound/core.h>
36#include <sound/pcm.h>
37#include <sound/pcm_params.h>
38#include <sound/control.h>
39#include <sound/initval.h>
40#include <sound/tlv.h>
41
42#include "cx25821.h"
43#include "cx25821-reg.h"
44
45#define AUDIO_SRAM_CHANNEL SRAM_CH08
46
47#define dprintk(level, fmt, arg...) \
48do { \
49 if (debug >= level) \
50 pr_info("%s/1: " fmt, chip->dev->name, ##arg); \
51} while (0)
52#define dprintk_core(level, fmt, arg...) \
53do { \
54 if (debug >= level) \
55 printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \
56} while (0)
57
58/****************************************************************************
59 Data type declarations - Can be moded to a header file later
60 ****************************************************************************/
61
62static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
63static int devno;
64
65struct cx25821_audio_buffer {
66 unsigned int bpl;
67 struct btcx_riscmem risc;
68 struct videobuf_dmabuf dma;
69};
70
71struct cx25821_audio_dev {
72 struct cx25821_dev *dev;
73 struct cx25821_dmaqueue q;
74
75 /* pci i/o */
76 struct pci_dev *pci;
77
78 /* audio controls */
79 int irq;
80
81 struct snd_card *card;
82
83 unsigned long iobase;
84 spinlock_t reg_lock;
85 atomic_t count;
86
87 unsigned int dma_size;
88 unsigned int period_size;
89 unsigned int num_periods;
90
91 struct videobuf_dmabuf *dma_risc;
92
93 struct cx25821_audio_buffer *buf;
94
95 struct snd_pcm_substream *substream;
96};
97
98
99/****************************************************************************
100 Module global static vars
101 ****************************************************************************/
102
103static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
104static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
105static bool enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
106
107module_param_array(enable, bool, NULL, 0444);
108MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
109
110module_param_array(index, int, NULL, 0444);
111MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
112
113/****************************************************************************
114 Module macros
115 ****************************************************************************/
116
117MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
118MODULE_AUTHOR("Hiep Huynh");
119MODULE_LICENSE("GPL");
120MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */
121
122static unsigned int debug;
123module_param(debug, int, 0644);
124MODULE_PARM_DESC(debug, "enable debug messages");
125
126/****************************************************************************
127 Module specific funtions
128 ****************************************************************************/
129/* Constants taken from cx88-reg.h */
130#define AUD_INT_DN_RISCI1 (1 << 0)
131#define AUD_INT_UP_RISCI1 (1 << 1)
132#define AUD_INT_RDS_DN_RISCI1 (1 << 2)
133#define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */
134#define AUD_INT_UP_RISCI2 (1 << 5)
135#define AUD_INT_RDS_DN_RISCI2 (1 << 6)
136#define AUD_INT_DN_SYNC (1 << 12)
137#define AUD_INT_UP_SYNC (1 << 13)
138#define AUD_INT_RDS_DN_SYNC (1 << 14)
139#define AUD_INT_OPC_ERR (1 << 16)
140#define AUD_INT_BER_IRQ (1 << 20)
141#define AUD_INT_MCHG_IRQ (1 << 21)
142#define GP_COUNT_CONTROL_RESET 0x3
143
144#define PCI_MSK_AUD_EXT (1 << 4)
145#define PCI_MSK_AUD_INT (1 << 3)
146/*
147 * BOARD Specific: Sets audio DMA
148 */
149
150static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
151{
152 struct cx25821_audio_buffer *buf = chip->buf;
153 struct cx25821_dev *dev = chip->dev;
154 struct sram_channel *audio_ch =
155 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
156 u32 tmp = 0;
157
158 /* enable output on the GPIO 0 for the MCLK ADC (Audio) */
159 cx25821_set_gpiopin_direction(chip->dev, 0, 0);
160
161 /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
162 cx_clear(AUD_INT_DMA_CTL,
163 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
164
165 /* setup fifo + format - out channel */
166 cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
167 buf->risc.dma);
168
169 /* sets bpl size */
170 cx_write(AUD_A_LNGTH, buf->bpl);
171
172 /* reset counter */
173 /* GP_COUNT_CONTROL_RESET = 0x3 */
174 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
175 atomic_set(&chip->count, 0);
176
177 /* Set the input mode to 16-bit */
178 tmp = cx_read(AUD_A_CFG);
179 cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
180 FLD_AUD_CLK_ENABLE);
181
182 /*
183 pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n",
184 buf->bpl, audio_ch->cmds_start,
185 cx_read(audio_ch->cmds_start + 12)>>1,
186 chip->num_periods, buf->bpl * chip->num_periods);
187 */
188
189 /* Enables corresponding bits at AUD_INT_STAT */
190 cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF |
191 FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR);
192
193 /* Clean any pending interrupt bits already set */
194 cx_write(AUD_A_INT_STAT, ~0);
195
196 /* enable audio irqs */
197 cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
198
199 /* Turn on audio downstream fifo and risc enable 0x101 */
200 tmp = cx_read(AUD_INT_DMA_CTL);
201 cx_set(AUD_INT_DMA_CTL, tmp |
202 (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
203
204 mdelay(100);
205 return 0;
206}
207
208/*
209 * BOARD Specific: Resets audio DMA
210 */
211static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
212{
213 struct cx25821_dev *dev = chip->dev;
214
215 /* stop dma */
216 cx_clear(AUD_INT_DMA_CTL,
217 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
218
219 /* disable irqs */
220 cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
221 cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
222 AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
223
224 return 0;
225}
226
227#define MAX_IRQ_LOOP 50
228
229/*
230 * BOARD Specific: IRQ dma bits
231 */
232static char *cx25821_aud_irqs[32] = {
233 "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
234 NULL, /* reserved */
235 "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
236 NULL, /* reserved */
237 "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */
238 NULL, /* reserved */
239 "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */
240 NULL, /* reserved */
241 "opc_err", "par_err", "rip_err", /* 16-18 */
242 "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */
243};
244
245/*
246 * BOARD Specific: Threats IRQ audio specific calls
247 */
248static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
249 u32 mask)
250{
251 struct cx25821_dev *dev = chip->dev;
252
253 if (0 == (status & mask))
254 return;
255
256 cx_write(AUD_A_INT_STAT, status);
257 if (debug > 1 || (status & mask & ~0xff))
258 cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs,
259 ARRAY_SIZE(cx25821_aud_irqs), status, mask);
260
261 /* risc op code error */
262 if (status & AUD_INT_OPC_ERR) {
263 pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name);
264
265 cx_clear(AUD_INT_DMA_CTL,
266 FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
267 cx25821_sram_channel_dump_audio(dev,
268 &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]);
269 }
270 if (status & AUD_INT_DN_SYNC) {
271 pr_warn("WARNING %s: Downstream sync error!\n", dev->name);
272 cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
273 return;
274 }
275
276 /* risc1 downstream */
277 if (status & AUD_INT_DN_RISCI1) {
278 atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
279 snd_pcm_period_elapsed(chip->substream);
280 }
281}
282
283/*
284 * BOARD Specific: Handles IRQ calls
285 */
286static irqreturn_t cx25821_irq(int irq, void *dev_id)
287{
288 struct cx25821_audio_dev *chip = dev_id;
289 struct cx25821_dev *dev = chip->dev;
290 u32 status, pci_status;
291 u32 audint_status, audint_mask;
292 int loop, handled = 0;
293
294 audint_status = cx_read(AUD_A_INT_STAT);
295 audint_mask = cx_read(AUD_A_INT_MSK);
296 status = cx_read(PCI_INT_STAT);
297
298 for (loop = 0; loop < 1; loop++) {
299 status = cx_read(PCI_INT_STAT);
300 if (0 == status) {
301 status = cx_read(PCI_INT_STAT);
302 audint_status = cx_read(AUD_A_INT_STAT);
303 audint_mask = cx_read(AUD_A_INT_MSK);
304
305 if (status) {
306 handled = 1;
307 cx_write(PCI_INT_STAT, status);
308
309 cx25821_aud_irq(chip, audint_status,
310 audint_mask);
311 break;
312 } else {
313 goto out;
314 }
315 }
316
317 handled = 1;
318 cx_write(PCI_INT_STAT, status);
319
320 cx25821_aud_irq(chip, audint_status, audint_mask);
321 }
322
323 pci_status = cx_read(PCI_INT_STAT);
324
325 if (handled)
326 cx_write(PCI_INT_STAT, pci_status);
327
328out:
329 return IRQ_RETVAL(handled);
330}
331
332static int dsp_buffer_free(struct cx25821_audio_dev *chip)
333{
334 BUG_ON(!chip->dma_size);
335
336 dprintk(2, "Freeing buffer\n");
337 videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
338 videobuf_dma_free(chip->dma_risc);
339 btcx_riscmem_free(chip->pci, &chip->buf->risc);
340 kfree(chip->buf);
341
342 chip->dma_risc = NULL;
343 chip->dma_size = 0;
344
345 return 0;
346}
347
348/****************************************************************************
349 ALSA PCM Interface
350 ****************************************************************************/
351
352/*
353 * Digital hardware definition
354 */
355#define DEFAULT_FIFO_SIZE 384
356static struct snd_pcm_hardware snd_cx25821_digital_hw = {
357 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
358 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
359 .formats = SNDRV_PCM_FMTBIT_S16_LE,
360
361 .rates = SNDRV_PCM_RATE_48000,
362 .rate_min = 48000,
363 .rate_max = 48000,
364 .channels_min = 2,
365 .channels_max = 2,
366 /* Analog audio output will be full of clicks and pops if there
367 are not exactly four lines in the SRAM FIFO buffer. */
368 .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
369 .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
370 .periods_min = 1,
371 .periods_max = AUDIO_LINE_SIZE,
372 /* 128 * 128 = 16384 = 1024 * 16 */
373 .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
374};
375
376/*
377 * audio pcm capture open callback
378 */
379static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
380{
381 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
382 struct snd_pcm_runtime *runtime = substream->runtime;
383 int err;
384 unsigned int bpl = 0;
385
386 if (!chip) {
387 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n");
388 return -ENODEV;
389 }
390
391 err = snd_pcm_hw_constraint_pow2(runtime, 0,
392 SNDRV_PCM_HW_PARAM_PERIODS);
393 if (err < 0)
394 goto _error;
395
396 chip->substream = substream;
397
398 runtime->hw = snd_cx25821_digital_hw;
399
400 if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
401 DEFAULT_FIFO_SIZE) {
402 /* since there are 3 audio Clusters */
403 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
404 bpl &= ~7; /* must be multiple of 8 */
405
406 if (bpl > AUDIO_LINE_SIZE)
407 bpl = AUDIO_LINE_SIZE;
408
409 runtime->hw.period_bytes_min = bpl;
410 runtime->hw.period_bytes_max = bpl;
411 }
412
413 return 0;
414_error:
415 dprintk(1, "Error opening PCM!\n");
416 return err;
417}
418
419/*
420 * audio close callback
421 */
422static int snd_cx25821_close(struct snd_pcm_substream *substream)
423{
424 return 0;
425}
426
427/*
428 * hw_params callback
429 */
430static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
431 struct snd_pcm_hw_params *hw_params)
432{
433 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
434 struct videobuf_dmabuf *dma;
435
436 struct cx25821_audio_buffer *buf;
437 int ret;
438
439 if (substream->runtime->dma_area) {
440 dsp_buffer_free(chip);
441 substream->runtime->dma_area = NULL;
442 }
443
444 chip->period_size = params_period_bytes(hw_params);
445 chip->num_periods = params_periods(hw_params);
446 chip->dma_size = chip->period_size * params_periods(hw_params);
447
448 BUG_ON(!chip->dma_size);
449 BUG_ON(chip->num_periods & (chip->num_periods - 1));
450
451 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
452 if (NULL == buf)
453 return -ENOMEM;
454
455 if (chip->period_size > AUDIO_LINE_SIZE)
456 chip->period_size = AUDIO_LINE_SIZE;
457
458 buf->bpl = chip->period_size;
459
460 dma = &buf->dma;
461 videobuf_dma_init(dma);
462 ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
463 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
464 if (ret < 0)
465 goto error;
466
467 ret = videobuf_dma_map(&chip->pci->dev, dma);
468 if (ret < 0)
469 goto error;
470
471 ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
472 chip->period_size, chip->num_periods, 1);
473 if (ret < 0) {
474 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
475 goto error;
476 }
477
478 /* Loop back to start of program */
479 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
480 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
481 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
482
483 chip->buf = buf;
484 chip->dma_risc = dma;
485
486 substream->runtime->dma_area = chip->dma_risc->vaddr;
487 substream->runtime->dma_bytes = chip->dma_size;
488 substream->runtime->dma_addr = 0;
489
490 return 0;
491
492error:
493 kfree(buf);
494 return ret;
495}
496
497/*
498 * hw free callback
499 */
500static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
501{
502 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
503
504 if (substream->runtime->dma_area) {
505 dsp_buffer_free(chip);
506 substream->runtime->dma_area = NULL;
507 }
508
509 return 0;
510}
511
512/*
513 * prepare callback
514 */
515static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
516{
517 return 0;
518}
519
520/*
521 * trigger callback
522 */
523static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
524 int cmd)
525{
526 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
527 int err = 0;
528
529 /* Local interrupts are already disabled by ALSA */
530 spin_lock(&chip->reg_lock);
531
532 switch (cmd) {
533 case SNDRV_PCM_TRIGGER_START:
534 err = _cx25821_start_audio_dma(chip);
535 break;
536 case SNDRV_PCM_TRIGGER_STOP:
537 err = _cx25821_stop_audio_dma(chip);
538 break;
539 default:
540 err = -EINVAL;
541 break;
542 }
543
544 spin_unlock(&chip->reg_lock);
545
546 return err;
547}
548
549/*
550 * pointer callback
551 */
552static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
553 *substream)
554{
555 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
556 struct snd_pcm_runtime *runtime = substream->runtime;
557 u16 count;
558
559 count = atomic_read(&chip->count);
560
561 return runtime->period_size * (count & (runtime->periods - 1));
562}
563
564/*
565 * page callback (needed for mmap)
566 */
567static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
568 unsigned long offset)
569{
570 void *pageptr = substream->runtime->dma_area + offset;
571
572 return vmalloc_to_page(pageptr);
573}
574
575/*
576 * operators
577 */
578static struct snd_pcm_ops snd_cx25821_pcm_ops = {
579 .open = snd_cx25821_pcm_open,
580 .close = snd_cx25821_close,
581 .ioctl = snd_pcm_lib_ioctl,
582 .hw_params = snd_cx25821_hw_params,
583 .hw_free = snd_cx25821_hw_free,
584 .prepare = snd_cx25821_prepare,
585 .trigger = snd_cx25821_card_trigger,
586 .pointer = snd_cx25821_pointer,
587 .page = snd_cx25821_page,
588};
589
590/*
591 * ALSA create a PCM device: Called when initializing the board.
592 * Sets up the name and hooks up the callbacks
593 */
594static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
595 char *name)
596{
597 struct snd_pcm *pcm;
598 int err;
599
600 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
601 if (err < 0) {
602 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__);
603 return err;
604 }
605 pcm->private_data = chip;
606 pcm->info_flags = 0;
607 strcpy(pcm->name, name);
608 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
609
610 return 0;
611}
612
613/****************************************************************************
614 Basic Flow for Sound Devices
615 ****************************************************************************/
616
617/*
618 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
619 * Only boards with eeprom and byte 1 at eeprom=1 have it
620 */
621
622static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
623 {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
624 {0,}
625};
626
627MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
628
629/*
630 * Not used in the function snd_cx25821_dev_free so removing
631 * from the file.
632 */
633/*
634static int snd_cx25821_free(struct cx25821_audio_dev *chip)
635{
636 if (chip->irq >= 0)
637 free_irq(chip->irq, chip);
638
639 cx25821_dev_unregister(chip->dev);
640 pci_disable_device(chip->pci);
641
642 return 0;
643}
644*/
645
646/*
647 * Component Destructor
648 */
649static void snd_cx25821_dev_free(struct snd_card *card)
650{
651 struct cx25821_audio_dev *chip = card->private_data;
652
653 /* snd_cx25821_free(chip); */
654 snd_card_free(chip->card);
655}
656
657/*
658 * Alsa Constructor - Component probe
659 */
660static int cx25821_audio_initdev(struct cx25821_dev *dev)
661{
662 struct snd_card *card;
663 struct cx25821_audio_dev *chip;
664 int err;
665
666 if (devno >= SNDRV_CARDS) {
667 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__);
668 return -ENODEV;
669 }
670
671 if (!enable[devno]) {
672 ++devno;
673 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__);
674 return -ENOENT;
675 }
676
677 err = snd_card_create(index[devno], id[devno], THIS_MODULE,
678 sizeof(struct cx25821_audio_dev), &card);
679 if (err < 0) {
680 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n",
681 __func__);
682 return err;
683 }
684
685 strcpy(card->driver, "cx25821");
686
687 /* Card "creation" */
688 card->private_free = snd_cx25821_dev_free;
689 chip = card->private_data;
690 spin_lock_init(&chip->reg_lock);
691
692 chip->dev = dev;
693 chip->card = card;
694 chip->pci = dev->pci;
695 chip->iobase = pci_resource_start(dev->pci, 0);
696
697 chip->irq = dev->pci->irq;
698
699 err = request_irq(dev->pci->irq, cx25821_irq,
700 IRQF_SHARED, chip->dev->name, chip);
701
702 if (err < 0) {
703 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name,
704 dev->pci->irq);
705 goto error;
706 }
707
708 err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
709 if (err < 0) {
710 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
711 __func__);
712 goto error;
713 }
714
715 snd_card_set_dev(card, &chip->pci->dev);
716
717 strcpy(card->shortname, "cx25821");
718 sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
719 chip->iobase, chip->irq);
720 strcpy(card->mixername, "CX25821");
721
722 pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver,
723 devno);
724
725 err = snd_card_register(card);
726 if (err < 0) {
727 pr_info("DEBUG ERROR: cannot register sound card %s\n",
728 __func__);
729 goto error;
730 }
731
732 snd_cx25821_cards[devno] = card;
733
734 devno++;
735 return 0;
736
737error:
738 snd_card_free(card);
739 return err;
740}
741
742/****************************************************************************
743 LINUX MODULE INIT
744 ****************************************************************************/
745static void cx25821_audio_fini(void)
746{
747 snd_card_free(snd_cx25821_cards[0]);
748}
749
750/*
751 * Module initializer
752 *
753 * Loops through present saa7134 cards, and assigns an ALSA device
754 * to each one
755 *
756 */
757static int cx25821_alsa_init(void)
758{
759 struct cx25821_dev *dev = NULL;
760 struct list_head *list;
761
762 mutex_lock(&cx25821_devlist_mutex);
763 list_for_each(list, &cx25821_devlist) {
764 dev = list_entry(list, struct cx25821_dev, devlist);
765 cx25821_audio_initdev(dev);
766 }
767 mutex_unlock(&cx25821_devlist_mutex);
768
769 if (dev == NULL)
770 pr_info("ERROR ALSA: no cx25821 cards found\n");
771
772 return 0;
773
774}
775
776late_initcall(cx25821_alsa_init);
777module_exit(cx25821_audio_fini);
778
779/* ----------------------------------------------------------- */
780/*
781 * Local variables:
782 * c-basic-offset: 8
783 * End:
784 */