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...) \
48 do { \
49 if (debug >= level) \
50 pr_info("%s/1: " fmt, chip->dev->name, ##arg); \
51 } while (0)
52 #define dprintk_core(level, fmt, arg...) \
53 do { \
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
62 static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
63 static int devno;
64
65 struct cx25821_audio_buffer {
66 unsigned int bpl;
67 struct btcx_riscmem risc;
68 struct videobuf_dmabuf dma;
69 };
70
71 struct 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
103 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
104 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
105 static bool enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 };
106
107 module_param_array(enable, bool, NULL, 0444);
108 MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
109
110 module_param_array(index, int, NULL, 0444);
111 MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
112
113 /****************************************************************************
114 Module macros
115 ****************************************************************************/
116
117 MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
118 MODULE_AUTHOR("Hiep Huynh");
119 MODULE_LICENSE("GPL");
120 MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */
121
122 static unsigned int debug;
123 module_param(debug, int, 0644);
124 MODULE_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
_cx25821_start_audio_dma(struct cx25821_audio_dev * chip)150 static 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 */
_cx25821_stop_audio_dma(struct cx25821_audio_dev * chip)211 static 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 */
232 static 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 */
cx25821_aud_irq(struct cx25821_audio_dev * chip,u32 status,u32 mask)248 static 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 */
cx25821_irq(int irq,void * dev_id)286 static 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 int audint_count = 0;
294
295 audint_status = cx_read(AUD_A_INT_STAT);
296 audint_mask = cx_read(AUD_A_INT_MSK);
297 audint_count = cx_read(AUD_A_GPCNT);
298 status = cx_read(PCI_INT_STAT);
299
300 for (loop = 0; loop < 1; loop++) {
301 status = cx_read(PCI_INT_STAT);
302 if (0 == status) {
303 status = cx_read(PCI_INT_STAT);
304 audint_status = cx_read(AUD_A_INT_STAT);
305 audint_mask = cx_read(AUD_A_INT_MSK);
306
307 if (status) {
308 handled = 1;
309 cx_write(PCI_INT_STAT, status);
310
311 cx25821_aud_irq(chip, audint_status,
312 audint_mask);
313 break;
314 } else {
315 goto out;
316 }
317 }
318
319 handled = 1;
320 cx_write(PCI_INT_STAT, status);
321
322 cx25821_aud_irq(chip, audint_status, audint_mask);
323 }
324
325 pci_status = cx_read(PCI_INT_STAT);
326
327 if (handled)
328 cx_write(PCI_INT_STAT, pci_status);
329
330 out:
331 return IRQ_RETVAL(handled);
332 }
333
dsp_buffer_free(struct cx25821_audio_dev * chip)334 static int dsp_buffer_free(struct cx25821_audio_dev *chip)
335 {
336 BUG_ON(!chip->dma_size);
337
338 dprintk(2, "Freeing buffer\n");
339 videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
340 videobuf_dma_free(chip->dma_risc);
341 btcx_riscmem_free(chip->pci, &chip->buf->risc);
342 kfree(chip->buf);
343
344 chip->dma_risc = NULL;
345 chip->dma_size = 0;
346
347 return 0;
348 }
349
350 /****************************************************************************
351 ALSA PCM Interface
352 ****************************************************************************/
353
354 /*
355 * Digital hardware definition
356 */
357 #define DEFAULT_FIFO_SIZE 384
358 static struct snd_pcm_hardware snd_cx25821_digital_hw = {
359 .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
360 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
361 .formats = SNDRV_PCM_FMTBIT_S16_LE,
362
363 .rates = SNDRV_PCM_RATE_48000,
364 .rate_min = 48000,
365 .rate_max = 48000,
366 .channels_min = 2,
367 .channels_max = 2,
368 /* Analog audio output will be full of clicks and pops if there
369 are not exactly four lines in the SRAM FIFO buffer. */
370 .period_bytes_min = DEFAULT_FIFO_SIZE / 3,
371 .period_bytes_max = DEFAULT_FIFO_SIZE / 3,
372 .periods_min = 1,
373 .periods_max = AUDIO_LINE_SIZE,
374 /* 128 * 128 = 16384 = 1024 * 16 */
375 .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
376 };
377
378 /*
379 * audio pcm capture open callback
380 */
snd_cx25821_pcm_open(struct snd_pcm_substream * substream)381 static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
382 {
383 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
384 struct snd_pcm_runtime *runtime = substream->runtime;
385 int err;
386 unsigned int bpl = 0;
387
388 if (!chip) {
389 pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n");
390 return -ENODEV;
391 }
392
393 err = snd_pcm_hw_constraint_pow2(runtime, 0,
394 SNDRV_PCM_HW_PARAM_PERIODS);
395 if (err < 0)
396 goto _error;
397
398 chip->substream = substream;
399
400 runtime->hw = snd_cx25821_digital_hw;
401
402 if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
403 DEFAULT_FIFO_SIZE) {
404 /* since there are 3 audio Clusters */
405 bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
406 bpl &= ~7; /* must be multiple of 8 */
407
408 if (bpl > AUDIO_LINE_SIZE)
409 bpl = AUDIO_LINE_SIZE;
410
411 runtime->hw.period_bytes_min = bpl;
412 runtime->hw.period_bytes_max = bpl;
413 }
414
415 return 0;
416 _error:
417 dprintk(1, "Error opening PCM!\n");
418 return err;
419 }
420
421 /*
422 * audio close callback
423 */
snd_cx25821_close(struct snd_pcm_substream * substream)424 static int snd_cx25821_close(struct snd_pcm_substream *substream)
425 {
426 return 0;
427 }
428
429 /*
430 * hw_params callback
431 */
snd_cx25821_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * hw_params)432 static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
433 struct snd_pcm_hw_params *hw_params)
434 {
435 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
436 struct videobuf_dmabuf *dma;
437
438 struct cx25821_audio_buffer *buf;
439 int ret;
440
441 if (substream->runtime->dma_area) {
442 dsp_buffer_free(chip);
443 substream->runtime->dma_area = NULL;
444 }
445
446 chip->period_size = params_period_bytes(hw_params);
447 chip->num_periods = params_periods(hw_params);
448 chip->dma_size = chip->period_size * params_periods(hw_params);
449
450 BUG_ON(!chip->dma_size);
451 BUG_ON(chip->num_periods & (chip->num_periods - 1));
452
453 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
454 if (NULL == buf)
455 return -ENOMEM;
456
457 if (chip->period_size > AUDIO_LINE_SIZE)
458 chip->period_size = AUDIO_LINE_SIZE;
459
460 buf->bpl = chip->period_size;
461
462 dma = &buf->dma;
463 videobuf_dma_init(dma);
464 ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
465 (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
466 if (ret < 0)
467 goto error;
468
469 ret = videobuf_dma_map(&chip->pci->dev, dma);
470 if (ret < 0)
471 goto error;
472
473 ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist,
474 chip->period_size, chip->num_periods, 1);
475 if (ret < 0) {
476 pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
477 goto error;
478 }
479
480 /* Loop back to start of program */
481 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
482 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
483 buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
484
485 chip->buf = buf;
486 chip->dma_risc = dma;
487
488 substream->runtime->dma_area = chip->dma_risc->vaddr;
489 substream->runtime->dma_bytes = chip->dma_size;
490 substream->runtime->dma_addr = 0;
491
492 return 0;
493
494 error:
495 kfree(buf);
496 return ret;
497 }
498
499 /*
500 * hw free callback
501 */
snd_cx25821_hw_free(struct snd_pcm_substream * substream)502 static int snd_cx25821_hw_free(struct snd_pcm_substream *substream)
503 {
504 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
505
506 if (substream->runtime->dma_area) {
507 dsp_buffer_free(chip);
508 substream->runtime->dma_area = NULL;
509 }
510
511 return 0;
512 }
513
514 /*
515 * prepare callback
516 */
snd_cx25821_prepare(struct snd_pcm_substream * substream)517 static int snd_cx25821_prepare(struct snd_pcm_substream *substream)
518 {
519 return 0;
520 }
521
522 /*
523 * trigger callback
524 */
snd_cx25821_card_trigger(struct snd_pcm_substream * substream,int cmd)525 static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream,
526 int cmd)
527 {
528 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
529 int err = 0;
530
531 /* Local interrupts are already disabled by ALSA */
532 spin_lock(&chip->reg_lock);
533
534 switch (cmd) {
535 case SNDRV_PCM_TRIGGER_START:
536 err = _cx25821_start_audio_dma(chip);
537 break;
538 case SNDRV_PCM_TRIGGER_STOP:
539 err = _cx25821_stop_audio_dma(chip);
540 break;
541 default:
542 err = -EINVAL;
543 break;
544 }
545
546 spin_unlock(&chip->reg_lock);
547
548 return err;
549 }
550
551 /*
552 * pointer callback
553 */
snd_cx25821_pointer(struct snd_pcm_substream * substream)554 static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream
555 *substream)
556 {
557 struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
558 struct snd_pcm_runtime *runtime = substream->runtime;
559 u16 count;
560
561 count = atomic_read(&chip->count);
562
563 return runtime->period_size * (count & (runtime->periods - 1));
564 }
565
566 /*
567 * page callback (needed for mmap)
568 */
snd_cx25821_page(struct snd_pcm_substream * substream,unsigned long offset)569 static struct page *snd_cx25821_page(struct snd_pcm_substream *substream,
570 unsigned long offset)
571 {
572 void *pageptr = substream->runtime->dma_area + offset;
573
574 return vmalloc_to_page(pageptr);
575 }
576
577 /*
578 * operators
579 */
580 static struct snd_pcm_ops snd_cx25821_pcm_ops = {
581 .open = snd_cx25821_pcm_open,
582 .close = snd_cx25821_close,
583 .ioctl = snd_pcm_lib_ioctl,
584 .hw_params = snd_cx25821_hw_params,
585 .hw_free = snd_cx25821_hw_free,
586 .prepare = snd_cx25821_prepare,
587 .trigger = snd_cx25821_card_trigger,
588 .pointer = snd_cx25821_pointer,
589 .page = snd_cx25821_page,
590 };
591
592 /*
593 * ALSA create a PCM device: Called when initializing the board.
594 * Sets up the name and hooks up the callbacks
595 */
snd_cx25821_pcm(struct cx25821_audio_dev * chip,int device,char * name)596 static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device,
597 char *name)
598 {
599 struct snd_pcm *pcm;
600 int err;
601
602 err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
603 if (err < 0) {
604 pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__);
605 return err;
606 }
607 pcm->private_data = chip;
608 pcm->info_flags = 0;
609 strcpy(pcm->name, name);
610 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops);
611
612 return 0;
613 }
614
615 /****************************************************************************
616 Basic Flow for Sound Devices
617 ****************************************************************************/
618
619 /*
620 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
621 * Only boards with eeprom and byte 1 at eeprom=1 have it
622 */
623
624 static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
625 {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
626 {0,}
627 };
628
629 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
630
631 /*
632 * Not used in the function snd_cx25821_dev_free so removing
633 * from the file.
634 */
635 /*
636 static int snd_cx25821_free(struct cx25821_audio_dev *chip)
637 {
638 if (chip->irq >= 0)
639 free_irq(chip->irq, chip);
640
641 cx25821_dev_unregister(chip->dev);
642 pci_disable_device(chip->pci);
643
644 return 0;
645 }
646 */
647
648 /*
649 * Component Destructor
650 */
snd_cx25821_dev_free(struct snd_card * card)651 static void snd_cx25821_dev_free(struct snd_card *card)
652 {
653 struct cx25821_audio_dev *chip = card->private_data;
654
655 /* snd_cx25821_free(chip); */
656 snd_card_free(chip->card);
657 }
658
659 /*
660 * Alsa Constructor - Component probe
661 */
cx25821_audio_initdev(struct cx25821_dev * dev)662 static int cx25821_audio_initdev(struct cx25821_dev *dev)
663 {
664 struct snd_card *card;
665 struct cx25821_audio_dev *chip;
666 int err;
667
668 if (devno >= SNDRV_CARDS) {
669 pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__);
670 return -ENODEV;
671 }
672
673 if (!enable[devno]) {
674 ++devno;
675 pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__);
676 return -ENOENT;
677 }
678
679 err = snd_card_create(index[devno], id[devno], THIS_MODULE,
680 sizeof(struct cx25821_audio_dev), &card);
681 if (err < 0) {
682 pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n",
683 __func__);
684 return err;
685 }
686
687 strcpy(card->driver, "cx25821");
688
689 /* Card "creation" */
690 card->private_free = snd_cx25821_dev_free;
691 chip = card->private_data;
692 spin_lock_init(&chip->reg_lock);
693
694 chip->dev = dev;
695 chip->card = card;
696 chip->pci = dev->pci;
697 chip->iobase = pci_resource_start(dev->pci, 0);
698
699 chip->irq = dev->pci->irq;
700
701 err = request_irq(dev->pci->irq, cx25821_irq,
702 IRQF_SHARED, chip->dev->name, chip);
703
704 if (err < 0) {
705 pr_err("ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name,
706 dev->pci->irq);
707 goto error;
708 }
709
710 err = snd_cx25821_pcm(chip, 0, "cx25821 Digital");
711 if (err < 0) {
712 pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n",
713 __func__);
714 goto error;
715 }
716
717 snd_card_set_dev(card, &chip->pci->dev);
718
719 strcpy(card->shortname, "cx25821");
720 sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
721 chip->iobase, chip->irq);
722 strcpy(card->mixername, "CX25821");
723
724 pr_info("%s/%i: ALSA support for cx25821 boards\n", card->driver,
725 devno);
726
727 err = snd_card_register(card);
728 if (err < 0) {
729 pr_info("DEBUG ERROR: cannot register sound card %s\n",
730 __func__);
731 goto error;
732 }
733
734 snd_cx25821_cards[devno] = card;
735
736 devno++;
737 return 0;
738
739 error:
740 snd_card_free(card);
741 return err;
742 }
743
744 /****************************************************************************
745 LINUX MODULE INIT
746 ****************************************************************************/
cx25821_audio_fini(void)747 static void cx25821_audio_fini(void)
748 {
749 snd_card_free(snd_cx25821_cards[0]);
750 }
751
752 /*
753 * Module initializer
754 *
755 * Loops through present saa7134 cards, and assigns an ALSA device
756 * to each one
757 *
758 */
cx25821_alsa_init(void)759 static int cx25821_alsa_init(void)
760 {
761 struct cx25821_dev *dev = NULL;
762 struct list_head *list;
763
764 mutex_lock(&cx25821_devlist_mutex);
765 list_for_each(list, &cx25821_devlist) {
766 dev = list_entry(list, struct cx25821_dev, devlist);
767 cx25821_audio_initdev(dev);
768 }
769 mutex_unlock(&cx25821_devlist_mutex);
770
771 if (dev == NULL)
772 pr_info("ERROR ALSA: no cx25821 cards found\n");
773
774 return 0;
775
776 }
777
778 late_initcall(cx25821_alsa_init);
779 module_exit(cx25821_audio_fini);
780
781 /* ----------------------------------------------------------- */
782 /*
783 * Local variables:
784 * c-basic-offset: 8
785 * End:
786 */
787