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02b20b0b MCC |
1 | /*\r |
2 | * Driver for the Conexant CX25821 PCIe bridge\r | |
3 | *\r | |
4 | * Copyright (C) 2009 Conexant Systems Inc. \r | |
5 | * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>\r | |
6 | * Based on SAA713x ALSA driver and CX88 driver\r | |
7 | *\r | |
8 | * This program is free software; you can redistribute it and/or modify\r | |
9 | * it under the terms of the GNU General Public License as published by\r | |
10 | * the Free Software Foundation, version 2\r | |
11 | *\r | |
12 | * This program is distributed in the hope that it will be useful,\r | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r | |
15 | * GNU General Public License for more details.\r | |
16 | *\r | |
17 | * You should have received a copy of the GNU General Public License\r | |
18 | * along with this program; if not, write to the Free Software\r | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r | |
20 | *\r | |
21 | */\r | |
22 | \r | |
23 | \r | |
24 | #include <linux/module.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/device.h> | |
27 | #include <linux/interrupt.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/dma-mapping.h> | |
30 | #include <linux/pci.h> | |
31 | ||
32 | #include <asm/delay.h> | |
33 | #include <sound/core.h> | |
34 | #include <sound/pcm.h> | |
35 | #include <sound/pcm_params.h> | |
36 | #include <sound/control.h> | |
37 | #include <sound/initval.h> | |
38 | #include <sound/tlv.h> | |
39 | ||
40 | ||
41 | #include "cx25821.h" | |
42 | #include "cx25821-reg.h" | |
43 | ||
44 | #define AUDIO_SRAM_CHANNEL SRAM_CH08 | |
45 | ||
46 | #define dprintk(level,fmt, arg...) if (debug >= level) \ | |
47 | printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg) | |
48 | ||
49 | #define dprintk_core(level,fmt, arg...) if (debug >= level) \ | |
50 | printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg) | |
51 | ||
52 | ||
53 | /**************************************************************************** | |
54 | Data type declarations - Can be moded to a header file later | |
55 | ****************************************************************************/ | |
56 | ||
57 | ||
58 | static struct snd_card *snd_cx25821_cards[SNDRV_CARDS]; | |
59 | static int devno; | |
60 | ||
61 | struct cx25821_audio_dev { | |
62 | struct cx25821_dev *dev; | |
63 | struct cx25821_dmaqueue q; | |
64 | ||
65 | /* pci i/o */ | |
66 | struct pci_dev *pci; | |
67 | ||
68 | /* audio controls */ | |
69 | int irq; | |
70 | ||
71 | struct snd_card *card; | |
72 | ||
73 | unsigned long iobase; | |
74 | spinlock_t reg_lock; | |
75 | atomic_t count; | |
76 | ||
77 | unsigned int dma_size; | |
78 | unsigned int period_size; | |
79 | unsigned int num_periods; | |
80 | ||
81 | struct videobuf_dmabuf *dma_risc; | |
82 | ||
83 | struct cx25821_buffer *buf; | |
84 | ||
85 | struct snd_pcm_substream *substream; | |
86 | }; | |
87 | typedef struct cx25821_audio_dev snd_cx25821_card_t; | |
88 | ||
89 | ||
90 | ||
91 | /**************************************************************************** | |
92 | Module global static vars | |
93 | ****************************************************************************/ | |
94 | ||
95 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
96 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
97 | static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1}; | |
98 | ||
99 | module_param_array(enable, bool, NULL, 0444); | |
100 | MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); | |
101 | ||
102 | module_param_array(index, int, NULL, 0444); | |
103 | MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); | |
104 | ||
105 | ||
106 | /**************************************************************************** | |
107 | Module macros | |
108 | ****************************************************************************/ | |
109 | ||
110 | MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); | |
111 | MODULE_AUTHOR("Hiep Huynh"); | |
112 | MODULE_LICENSE("GPL"); | |
113 | MODULE_SUPPORTED_DEVICE("{{Conexant,25821}");//"{{Conexant,23881}," | |
114 | ||
115 | static unsigned int debug; | |
116 | module_param(debug,int,0644); | |
117 | MODULE_PARM_DESC(debug,"enable debug messages"); | |
118 | ||
119 | /**************************************************************************** | |
120 | Module specific funtions | |
121 | ****************************************************************************/ | |
122 | /* Constants taken from cx88-reg.h */ | |
123 | #define AUD_INT_DN_RISCI1 (1 << 0) | |
124 | #define AUD_INT_UP_RISCI1 (1 << 1) | |
125 | #define AUD_INT_RDS_DN_RISCI1 (1 << 2) | |
126 | #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ | |
127 | #define AUD_INT_UP_RISCI2 (1 << 5) | |
128 | #define AUD_INT_RDS_DN_RISCI2 (1 << 6) | |
129 | #define AUD_INT_DN_SYNC (1 << 12) | |
130 | #define AUD_INT_UP_SYNC (1 << 13) | |
131 | #define AUD_INT_RDS_DN_SYNC (1 << 14) | |
132 | #define AUD_INT_OPC_ERR (1 << 16) | |
133 | #define AUD_INT_BER_IRQ (1 << 20) | |
134 | #define AUD_INT_MCHG_IRQ (1 << 21) | |
135 | #define GP_COUNT_CONTROL_RESET 0x3 | |
136 | ||
137 | #define PCI_MSK_AUD_EXT (1 << 4) | |
138 | #define PCI_MSK_AUD_INT (1 << 3) | |
139 | /* | |
140 | * BOARD Specific: Sets audio DMA | |
141 | */ | |
142 | ||
143 | static int _cx25821_start_audio_dma(snd_cx25821_card_t *chip) | |
144 | { | |
145 | struct cx25821_buffer *buf = chip->buf; | |
146 | struct cx25821_dev * dev = chip->dev; | |
147 | struct sram_channel *audio_ch = &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; | |
148 | u32 tmp = 0; | |
149 | ||
150 | // enable output on the GPIO 0 for the MCLK ADC (Audio) | |
151 | cx25821_set_gpiopin_direction( chip->dev, 0, 0 ); | |
152 | ||
153 | /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ | |
154 | cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN ); | |
155 | ||
156 | /* setup fifo + format - out channel */ | |
157 | cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, buf->risc.dma); | |
158 | ||
159 | /* sets bpl size */ | |
160 | cx_write(AUD_A_LNGTH, buf->bpl); | |
161 | ||
162 | /* reset counter */ | |
163 | cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); //GP_COUNT_CONTROL_RESET = 0x3 | |
164 | atomic_set(&chip->count, 0); | |
165 | ||
166 | //Set the input mode to 16-bit | |
167 | tmp = cx_read(AUD_A_CFG); | |
168 | cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | FLD_AUD_CLK_ENABLE); | |
169 | ||
170 | //printk(KERN_INFO "DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d " | |
171 | // "byte buffer\n", buf->bpl, audio_ch->cmds_start, cx_read(audio_ch->cmds_start + 12)>>1, | |
172 | // chip->num_periods, buf->bpl * chip->num_periods); | |
173 | ||
174 | ||
175 | /* Enables corresponding bits at AUD_INT_STAT */ | |
176 | cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR ); | |
177 | ||
178 | /* Clean any pending interrupt bits already set */ | |
179 | cx_write(AUD_A_INT_STAT, ~0); | |
180 | ||
181 | /* enable audio irqs */ | |
182 | cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); | |
183 | ||
184 | // Turn on audio downstream fifo and risc enable 0x101 | |
185 | tmp = cx_read(AUD_INT_DMA_CTL); | |
186 | cx_set(AUD_INT_DMA_CTL, tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN) ); | |
187 | ||
188 | mdelay(100); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | /* | |
193 | * BOARD Specific: Resets audio DMA | |
194 | */ | |
195 | static int _cx25821_stop_audio_dma(snd_cx25821_card_t *chip) | |
196 | { | |
197 | struct cx25821_dev *dev = chip->dev; | |
198 | ||
199 | /* stop dma */ | |
200 | cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN ); | |
201 | ||
202 | /* disable irqs */ | |
203 | cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); | |
204 | cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | #define MAX_IRQ_LOOP 50 | |
210 | ||
211 | /* | |
212 | * BOARD Specific: IRQ dma bits | |
213 | */ | |
214 | static char *cx25821_aud_irqs[32] = { | |
215 | "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ | |
216 | NULL, /* reserved */ | |
217 | "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ | |
218 | NULL, /* reserved */ | |
219 | "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ | |
220 | NULL, /* reserved */ | |
221 | "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ | |
222 | NULL, /* reserved */ | |
223 | "opc_err", "par_err", "rip_err", /* 16-18 */ | |
224 | "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ | |
225 | }; | |
226 | ||
227 | /* | |
228 | * BOARD Specific: Threats IRQ audio specific calls | |
229 | */ | |
230 | static void cx25821_aud_irq(snd_cx25821_card_t *chip, u32 status, u32 mask) | |
231 | { | |
232 | struct cx25821_dev *dev = chip->dev; | |
233 | ||
234 | if (0 == (status & mask)) | |
235 | { | |
236 | return; | |
237 | } | |
238 | ||
239 | cx_write(AUD_A_INT_STAT, status); | |
240 | if (debug > 1 || (status & mask & ~0xff)) | |
241 | cx25821_print_irqbits(dev->name, "irq aud", | |
242 | cx25821_aud_irqs, ARRAY_SIZE(cx25821_aud_irqs), | |
243 | status, mask); | |
244 | ||
245 | /* risc op code error */ | |
246 | if (status & AUD_INT_OPC_ERR) { | |
247 | printk(KERN_WARNING "WARNING %s/1: Audio risc op code error\n",dev->name); | |
248 | ||
249 | cx_clear(AUD_INT_DMA_CTL, FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN ); | |
250 | cx25821_sram_channel_dump_audio(dev, &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]); | |
251 | } | |
252 | if (status & AUD_INT_DN_SYNC) { | |
253 | printk(KERN_WARNING "WARNING %s: Downstream sync error!\n",dev->name); | |
254 | cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); | |
255 | return; | |
256 | } | |
257 | ||
258 | ||
259 | /* risc1 downstream */ | |
260 | if (status & AUD_INT_DN_RISCI1) { | |
261 | atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); | |
262 | snd_pcm_period_elapsed(chip->substream); | |
263 | } | |
264 | } | |
265 | ||
266 | ||
267 | /* | |
268 | * BOARD Specific: Handles IRQ calls | |
269 | */ | |
270 | static irqreturn_t cx25821_irq(int irq, void *dev_id) | |
271 | { | |
272 | snd_cx25821_card_t *chip = dev_id; | |
273 | struct cx25821_dev *dev = chip->dev; | |
274 | u32 status, pci_status; | |
275 | u32 audint_status, audint_mask; | |
276 | int loop, handled = 0; | |
277 | int audint_count = 0; | |
278 | ||
279 | ||
280 | audint_status = cx_read(AUD_A_INT_STAT); | |
281 | audint_mask = cx_read(AUD_A_INT_MSK); | |
282 | audint_count = cx_read(AUD_A_GPCNT); | |
283 | status = cx_read(PCI_INT_STAT); | |
284 | ||
285 | for (loop = 0; loop < 1; loop++) | |
286 | { | |
287 | status = cx_read(PCI_INT_STAT); | |
288 | if (0 == status) | |
289 | { | |
290 | status = cx_read(PCI_INT_STAT); | |
291 | audint_status = cx_read(AUD_A_INT_STAT); | |
292 | audint_mask = cx_read(AUD_A_INT_MSK); | |
293 | ||
294 | if (status) | |
295 | { | |
296 | handled = 1; | |
297 | cx_write(PCI_INT_STAT, status); | |
298 | ||
299 | cx25821_aud_irq(chip, audint_status, audint_mask); | |
300 | break; | |
301 | } | |
302 | else | |
303 | goto out; | |
304 | } | |
305 | ||
306 | handled = 1; | |
307 | cx_write(PCI_INT_STAT, status); | |
308 | ||
309 | cx25821_aud_irq(chip, audint_status, audint_mask); | |
310 | } | |
311 | ||
312 | pci_status = cx_read(PCI_INT_STAT); | |
313 | ||
314 | if (handled) | |
315 | cx_write(PCI_INT_STAT, pci_status); | |
316 | ||
317 | out: | |
318 | return IRQ_RETVAL(handled); | |
319 | } | |
320 | ||
321 | ||
322 | static int dsp_buffer_free(snd_cx25821_card_t *chip) | |
323 | { | |
324 | BUG_ON(!chip->dma_size); | |
325 | ||
326 | dprintk(2,"Freeing buffer\n"); | |
327 | videobuf_sg_dma_unmap(&chip->pci->dev, chip->dma_risc); | |
328 | videobuf_dma_free(chip->dma_risc); | |
329 | btcx_riscmem_free(chip->pci,&chip->buf->risc); | |
330 | kfree(chip->buf); | |
331 | ||
332 | chip->dma_risc = NULL; | |
333 | chip->dma_size = 0; | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | /**************************************************************************** | |
339 | ALSA PCM Interface | |
340 | ****************************************************************************/ | |
341 | ||
342 | /* | |
343 | * Digital hardware definition | |
344 | */ | |
345 | #define DEFAULT_FIFO_SIZE 384 | |
346 | static struct snd_pcm_hardware snd_cx25821_digital_hw = { | |
347 | .info = SNDRV_PCM_INFO_MMAP | | |
348 | SNDRV_PCM_INFO_INTERLEAVED | | |
349 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
350 | SNDRV_PCM_INFO_MMAP_VALID, | |
351 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
352 | ||
353 | .rates = SNDRV_PCM_RATE_48000, | |
354 | .rate_min = 48000, | |
355 | .rate_max = 48000, | |
356 | .channels_min = 2, | |
357 | .channels_max = 2, | |
358 | /* Analog audio output will be full of clicks and pops if there | |
359 | are not exactly four lines in the SRAM FIFO buffer. */ | |
360 | .period_bytes_min = DEFAULT_FIFO_SIZE/3, | |
361 | .period_bytes_max = DEFAULT_FIFO_SIZE/3, | |
362 | .periods_min = 1, | |
363 | .periods_max = AUDIO_LINE_SIZE, | |
364 | .buffer_bytes_max = (AUDIO_LINE_SIZE*AUDIO_LINE_SIZE), //128*128 = 16384 = 1024 * 16 | |
365 | }; | |
366 | ||
367 | ||
368 | ||
369 | /* | |
370 | * audio pcm capture open callback | |
371 | */ | |
372 | static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) | |
373 | { | |
374 | snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream); | |
375 | struct snd_pcm_runtime *runtime = substream->runtime; | |
376 | int err; | |
377 | unsigned int bpl = 0; | |
378 | ||
379 | if (!chip) { | |
380 | printk(KERN_ERR "DEBUG: cx25821 can't find device struct." | |
381 | " Can't proceed with open\n"); | |
382 | return -ENODEV; | |
383 | } | |
384 | ||
385 | err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); | |
386 | if (err < 0) | |
387 | goto _error; | |
388 | ||
389 | chip->substream = substream; | |
390 | ||
391 | runtime->hw = snd_cx25821_digital_hw; | |
392 | ||
393 | if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != DEFAULT_FIFO_SIZE) | |
394 | { | |
395 | bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; //since there are 3 audio Clusters | |
396 | bpl &= ~7; /* must be multiple of 8 */ | |
397 | ||
398 | if( bpl > AUDIO_LINE_SIZE ) | |
399 | { | |
400 | bpl = AUDIO_LINE_SIZE; | |
401 | } | |
402 | runtime->hw.period_bytes_min = bpl; | |
403 | runtime->hw.period_bytes_max = bpl; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | _error: | |
408 | dprintk(1,"Error opening PCM!\n"); | |
409 | return err; | |
410 | } | |
411 | ||
412 | /* | |
413 | * audio close callback | |
414 | */ | |
415 | static int snd_cx25821_close(struct snd_pcm_substream *substream) | |
416 | { | |
417 | return 0; | |
418 | } | |
419 | ||
420 | /* | |
421 | * hw_params callback | |
422 | */ | |
423 | static int snd_cx25821_hw_params(struct snd_pcm_substream * substream, | |
424 | struct snd_pcm_hw_params * hw_params) | |
425 | { | |
426 | snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream); | |
427 | struct videobuf_dmabuf *dma; | |
428 | ||
429 | struct cx25821_buffer *buf; | |
430 | int ret; | |
431 | ||
432 | if (substream->runtime->dma_area) { | |
433 | dsp_buffer_free(chip); | |
434 | substream->runtime->dma_area = NULL; | |
435 | } | |
436 | ||
437 | ||
438 | chip->period_size = params_period_bytes(hw_params); | |
439 | chip->num_periods = params_periods(hw_params); | |
440 | chip->dma_size = chip->period_size * params_periods(hw_params); | |
441 | ||
442 | BUG_ON(!chip->dma_size); | |
443 | BUG_ON(chip->num_periods & (chip->num_periods-1)); | |
444 | ||
445 | buf = videobuf_sg_alloc(sizeof(*buf)); | |
446 | if (NULL == buf) | |
447 | return -ENOMEM; | |
448 | ||
449 | ||
450 | if( chip->period_size > AUDIO_LINE_SIZE ) | |
451 | { | |
452 | chip->period_size = AUDIO_LINE_SIZE; | |
453 | } | |
454 | ||
455 | ||
456 | buf->vb.memory = V4L2_MEMORY_MMAP; | |
457 | buf->vb.field = V4L2_FIELD_NONE; | |
458 | buf->vb.width = chip->period_size; | |
459 | buf->bpl = chip->period_size; | |
460 | buf->vb.height = chip->num_periods; | |
461 | buf->vb.size = chip->dma_size; | |
462 | ||
463 | dma = videobuf_to_dma(&buf->vb); | |
464 | videobuf_dma_init(dma); | |
465 | ||
466 | ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, | |
467 | (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT)); | |
468 | if (ret < 0) | |
469 | goto error; | |
470 | ||
471 | ret = videobuf_sg_dma_map(&chip->pci->dev, dma); | |
472 | if (ret < 0) | |
473 | goto error; | |
474 | ||
475 | ||
476 | ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist, buf->vb.width, buf->vb.height, 1); | |
477 | if (ret < 0) | |
478 | { | |
479 | printk(KERN_INFO "DEBUG: ERROR after cx25821_risc_databuffer_audio() \n"); | |
480 | goto error; | |
481 | } | |
482 | ||
483 | ||
484 | /* Loop back to start of program */ | |
485 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC); | |
486 | buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); | |
487 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ | |
488 | ||
489 | buf->vb.state = VIDEOBUF_PREPARED; | |
490 | ||
491 | chip->buf = buf; | |
492 | chip->dma_risc = dma; | |
493 | ||
494 | substream->runtime->dma_area = chip->dma_risc->vmalloc; | |
495 | substream->runtime->dma_bytes = chip->dma_size; | |
496 | substream->runtime->dma_addr = 0; | |
497 | ||
498 | return 0; | |
499 | ||
500 | error: | |
501 | kfree(buf); | |
502 | return ret; | |
503 | } | |
504 | ||
505 | /* | |
506 | * hw free callback | |
507 | */ | |
508 | static int snd_cx25821_hw_free(struct snd_pcm_substream * substream) | |
509 | { | |
510 | snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream); | |
511 | ||
512 | if (substream->runtime->dma_area) { | |
513 | dsp_buffer_free(chip); | |
514 | substream->runtime->dma_area = NULL; | |
515 | } | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | /* | |
521 | * prepare callback | |
522 | */ | |
523 | static int snd_cx25821_prepare(struct snd_pcm_substream *substream) | |
524 | { | |
525 | return 0; | |
526 | } | |
527 | ||
528 | /* | |
529 | * trigger callback | |
530 | */ | |
531 | static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, int cmd) | |
532 | { | |
533 | snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream); | |
534 | int err = 0; | |
535 | ||
536 | /* Local interrupts are already disabled by ALSA */ | |
537 | spin_lock(&chip->reg_lock); | |
538 | ||
539 | switch (cmd) | |
540 | { | |
541 | case SNDRV_PCM_TRIGGER_START: | |
542 | err = _cx25821_start_audio_dma(chip); | |
543 | break; | |
544 | case SNDRV_PCM_TRIGGER_STOP: | |
545 | err = _cx25821_stop_audio_dma(chip); | |
546 | break; | |
547 | default: | |
548 | err = -EINVAL; | |
549 | break; | |
550 | } | |
551 | ||
552 | spin_unlock(&chip->reg_lock); | |
553 | ||
554 | return err; | |
555 | } | |
556 | ||
557 | /* | |
558 | * pointer callback | |
559 | */ | |
560 | static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream *substream) | |
561 | { | |
562 | snd_cx25821_card_t *chip = snd_pcm_substream_chip(substream); | |
563 | struct snd_pcm_runtime *runtime = substream->runtime; | |
564 | u16 count; | |
565 | ||
566 | count = atomic_read(&chip->count); | |
567 | ||
568 | return runtime->period_size * (count & (runtime->periods-1)); | |
569 | } | |
570 | ||
571 | /* | |
572 | * page callback (needed for mmap) | |
573 | */ | |
574 | static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, | |
575 | unsigned long offset) | |
576 | { | |
577 | void *pageptr = substream->runtime->dma_area + offset; | |
578 | ||
579 | return vmalloc_to_page(pageptr); | |
580 | } | |
581 | ||
582 | /* | |
583 | * operators | |
584 | */ | |
585 | static struct snd_pcm_ops snd_cx25821_pcm_ops = { | |
586 | .open = snd_cx25821_pcm_open, | |
587 | .close = snd_cx25821_close, | |
588 | .ioctl = snd_pcm_lib_ioctl, | |
589 | .hw_params = snd_cx25821_hw_params, | |
590 | .hw_free = snd_cx25821_hw_free, | |
591 | .prepare = snd_cx25821_prepare, | |
592 | .trigger = snd_cx25821_card_trigger, | |
593 | .pointer = snd_cx25821_pointer, | |
594 | .page = snd_cx25821_page, | |
595 | }; | |
596 | ||
597 | ||
598 | /* | |
599 | * ALSA create a PCM device: Called when initializing the board. Sets up the name and hooks up | |
600 | * the callbacks | |
601 | */ | |
602 | static int snd_cx25821_pcm(snd_cx25821_card_t *chip, int device, char *name) | |
603 | { | |
604 | struct snd_pcm *pcm; | |
605 | int err; | |
606 | ||
607 | err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); | |
608 | if (err < 0) | |
609 | { | |
610 | printk(KERN_INFO "ERROR: FAILED snd_pcm_new() in %s\n", __func__); | |
611 | return err; | |
612 | } | |
613 | pcm->private_data = chip; | |
614 | pcm->info_flags = 0; | |
615 | strcpy(pcm->name, name); | |
616 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | ||
622 | /**************************************************************************** | |
623 | Basic Flow for Sound Devices | |
624 | ****************************************************************************/ | |
625 | ||
626 | /* | |
627 | * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio | |
628 | * Only boards with eeprom and byte 1 at eeprom=1 have it | |
629 | */ | |
630 | ||
631 | static struct pci_device_id cx25821_audio_pci_tbl[] __devinitdata = { | |
632 | {0x14f1,0x0920,PCI_ANY_ID,PCI_ANY_ID,0,0,0}, | |
633 | {0, } | |
634 | }; | |
635 | MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); | |
636 | ||
637 | /*\r | |
638 | * Not used in the function snd_cx25821_dev_free so removing\r | |
639 | * from the file.\r | |
640 | */\r | |
641 | /* | |
642 | static int snd_cx25821_free(snd_cx25821_card_t *chip) | |
643 | { | |
644 | if (chip->irq >= 0) | |
645 | free_irq(chip->irq, chip); | |
646 | ||
647 | cx25821_dev_unregister(chip->dev); | |
648 | pci_disable_device(chip->pci); | |
649 | ||
650 | return 0; | |
651 | } | |
652 | */\r | |
653 | ||
654 | /* | |
655 | * Component Destructor | |
656 | */ | |
657 | static void snd_cx25821_dev_free(struct snd_card * card) | |
658 | { | |
659 | snd_cx25821_card_t *chip = card->private_data; | |
660 | ||
661 | //snd_cx25821_free(chip); | |
662 | snd_card_free(chip->card); | |
663 | } | |
664 | ||
665 | ||
666 | /* | |
667 | * Alsa Constructor - Component probe | |
668 | */ | |
669 | static int cx25821_audio_initdev(struct cx25821_dev *dev) | |
670 | { | |
671 | struct snd_card *card; | |
672 | snd_cx25821_card_t *chip; | |
673 | int err; | |
674 | ||
675 | if (devno >= SNDRV_CARDS) | |
676 | { | |
677 | printk(KERN_INFO "DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); | |
678 | return (-ENODEV); | |
679 | } | |
680 | ||
681 | if (!enable[devno]) { | |
682 | ++devno; | |
683 | printk(KERN_INFO "DEBUG ERROR: !enable[devno] %s\n", __func__); | |
684 | return (-ENOENT); | |
685 | } | |
686 | ||
687 | card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx25821_card_t)); | |
688 | if (!card) | |
689 | { | |
690 | printk(KERN_INFO "DEBUG ERROR: cannot create snd_card_new in %s\n", __func__); | |
691 | return (-ENOMEM); | |
692 | } | |
693 | ||
694 | strcpy(card->driver, "cx25821"); | |
695 | ||
696 | /* Card "creation" */ | |
697 | card->private_free = snd_cx25821_dev_free; | |
698 | chip = (snd_cx25821_card_t *) card->private_data; | |
699 | spin_lock_init(&chip->reg_lock); | |
700 | ||
701 | chip->dev = dev; | |
702 | chip->card = card; | |
703 | chip->pci = dev->pci; | |
704 | chip->iobase = pci_resource_start(dev->pci, 0); | |
705 | ||
706 | ||
707 | chip->irq = dev->pci->irq; | |
708 | ||
709 | err = request_irq(dev->pci->irq, cx25821_irq, | |
710 | IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip); | |
711 | ||
712 | if (err < 0) { | |
713 | printk(KERN_ERR "ERROR %s: can't get IRQ %d for ALSA\n", chip->dev->name, dev->pci->irq); | |
714 | goto error; | |
715 | } | |
716 | ||
717 | ||
718 | if ((err = snd_cx25821_pcm(chip, 0, "cx25821 Digital")) < 0) | |
719 | { | |
720 | printk(KERN_INFO "DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", __func__); | |
721 | goto error; | |
722 | } | |
723 | ||
724 | snd_card_set_dev(card, &chip->pci->dev); | |
725 | ||
726 | ||
727 | strcpy(card->shortname, "cx25821"); | |
728 | sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, chip->iobase, chip->irq); | |
729 | strcpy (card->mixername, "CX25821"); | |
730 | ||
731 | printk(KERN_INFO "%s/%i: ALSA support for cx25821 boards\n", card->driver, devno); | |
732 | ||
733 | err = snd_card_register(card); | |
734 | if (err < 0) | |
735 | { | |
736 | printk(KERN_INFO "DEBUG ERROR: cannot register sound card %s\n", __func__); | |
737 | goto error; | |
738 | } | |
739 | ||
740 | snd_cx25821_cards[devno] = card; | |
741 | ||
742 | devno++; | |
743 | return 0; | |
744 | ||
745 | error: | |
746 | snd_card_free(card); | |
747 | return err; | |
748 | } | |
749 | ||
750 | ||
751 | /**************************************************************************** | |
752 | LINUX MODULE INIT | |
753 | ****************************************************************************/ | |
754 | static void cx25821_audio_fini(void) | |
755 | { | |
756 | snd_card_free(snd_cx25821_cards[0]); | |
757 | } | |
758 | ||
759 | /* | |
760 | * Module initializer | |
761 | * | |
762 | * Loops through present saa7134 cards, and assigns an ALSA device | |
763 | * to each one | |
764 | * | |
765 | */ | |
766 | static int cx25821_alsa_init(void) | |
767 | { | |
768 | struct cx25821_dev *dev = NULL; | |
769 | struct list_head *list; | |
770 | ||
771 | list_for_each(list,&cx25821_devlist) { | |
772 | dev = list_entry(list, struct cx25821_dev, devlist); | |
773 | cx25821_audio_initdev(dev); | |
774 | } | |
775 | ||
776 | if (dev == NULL) | |
777 | printk(KERN_INFO "cx25821 ERROR ALSA: no cx25821 cards found\n"); | |
778 | ||
779 | return 0; | |
780 | ||
781 | } | |
782 | ||
783 | late_initcall(cx25821_alsa_init); | |
784 | module_exit(cx25821_audio_fini); | |
785 | ||
786 | /* ----------------------------------------------------------- */ | |
787 | /* | |
788 | * Local variables: | |
789 | * c-basic-offset: 8 | |
790 | * End: | |
791 | */ |