Commit | Line | Data |
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9e44d632 MM |
1 | /* |
2 | * | |
3 | * Support for CX23885 analog audio capture | |
4 | * | |
5 | * (c) 2008 Mijhail Moreyra <mijhail.moreyra@gmail.com> | |
6 | * Adapted from cx88-alsa.c | |
7 | * (c) 2009 Steven Toth <stoth@kernellabs.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
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 | ||
34 | #include <sound/core.h> | |
35 | #include <sound/pcm.h> | |
36 | #include <sound/pcm_params.h> | |
37 | #include <sound/control.h> | |
38 | #include <sound/initval.h> | |
39 | ||
40 | #include <sound/tlv.h> | |
41 | ||
42 | ||
43 | #include "cx23885.h" | |
44 | #include "cx23885-reg.h" | |
45 | ||
46 | #define AUDIO_SRAM_CHANNEL SRAM_CH07 | |
47 | ||
48 | #define dprintk(level, fmt, arg...) if (audio_debug >= level) \ | |
49 | printk(KERN_INFO "%s/1: " fmt, chip->dev->name , ## arg) | |
50 | ||
51 | #define dprintk_core(level, fmt, arg...) if (audio_debug >= level) \ | |
52 | printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name , ## arg) | |
53 | ||
54 | /**************************************************************************** | |
55 | Module global static vars | |
56 | ****************************************************************************/ | |
57 | ||
58 | static unsigned int disable_analog_audio; | |
59 | module_param(disable_analog_audio, int, 0644); | |
60 | MODULE_PARM_DESC(disable_analog_audio, "disable analog audio ALSA driver"); | |
61 | ||
62 | static unsigned int audio_debug; | |
63 | module_param(audio_debug, int, 0644); | |
64 | MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]"); | |
65 | ||
66 | /**************************************************************************** | |
67 | Board specific funtions | |
68 | ****************************************************************************/ | |
69 | ||
70 | /* Constants taken from cx88-reg.h */ | |
71 | #define AUD_INT_DN_RISCI1 (1 << 0) | |
72 | #define AUD_INT_UP_RISCI1 (1 << 1) | |
73 | #define AUD_INT_RDS_DN_RISCI1 (1 << 2) | |
74 | #define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ | |
75 | #define AUD_INT_UP_RISCI2 (1 << 5) | |
76 | #define AUD_INT_RDS_DN_RISCI2 (1 << 6) | |
77 | #define AUD_INT_DN_SYNC (1 << 12) | |
78 | #define AUD_INT_UP_SYNC (1 << 13) | |
79 | #define AUD_INT_RDS_DN_SYNC (1 << 14) | |
80 | #define AUD_INT_OPC_ERR (1 << 16) | |
81 | #define AUD_INT_BER_IRQ (1 << 20) | |
82 | #define AUD_INT_MCHG_IRQ (1 << 21) | |
83 | #define GP_COUNT_CONTROL_RESET 0x3 | |
84 | ||
85 | /* | |
86 | * BOARD Specific: Sets audio DMA | |
87 | */ | |
88 | ||
89 | static int cx23885_start_audio_dma(struct cx23885_audio_dev *chip) | |
90 | { | |
91 | struct cx23885_audio_buffer *buf = chip->buf; | |
92 | struct cx23885_dev *dev = chip->dev; | |
93 | struct sram_channel *audio_ch = | |
94 | &dev->sram_channels[AUDIO_SRAM_CHANNEL]; | |
95 | ||
96 | dprintk(1, "%s()\n", __func__); | |
97 | ||
98 | /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ | |
99 | cx_clear(AUD_INT_DMA_CTL, 0x11); | |
100 | ||
101 | /* setup fifo + format - out channel */ | |
102 | cx23885_sram_channel_setup(chip->dev, audio_ch, buf->bpl, | |
103 | buf->risc.dma); | |
104 | ||
105 | /* sets bpl size */ | |
106 | cx_write(AUD_INT_A_LNGTH, buf->bpl); | |
107 | ||
108 | /* This is required to get good audio (1 seems to be ok) */ | |
109 | cx_write(AUD_INT_A_MODE, 1); | |
110 | ||
111 | /* reset counter */ | |
112 | cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); | |
113 | atomic_set(&chip->count, 0); | |
114 | ||
115 | dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d " | |
116 | "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start+12)>>1, | |
117 | chip->num_periods, buf->bpl * chip->num_periods); | |
118 | ||
119 | /* Enables corresponding bits at AUD_INT_STAT */ | |
120 | cx_write(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | | |
121 | AUD_INT_DN_RISCI1); | |
122 | ||
123 | /* Clean any pending interrupt bits already set */ | |
124 | cx_write(AUDIO_INT_INT_STAT, ~0); | |
125 | ||
126 | /* enable audio irqs */ | |
127 | cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); | |
128 | ||
129 | /* start dma */ | |
130 | cx_set(DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */ | |
131 | cx_set(AUD_INT_DMA_CTL, 0x11); /* audio downstream FIFO and | |
132 | RISC enable */ | |
133 | if (audio_debug) | |
134 | cx23885_sram_channel_dump(chip->dev, audio_ch); | |
135 | ||
136 | return 0; | |
137 | } | |
138 | ||
139 | /* | |
140 | * BOARD Specific: Resets audio DMA | |
141 | */ | |
142 | static int cx23885_stop_audio_dma(struct cx23885_audio_dev *chip) | |
143 | { | |
144 | struct cx23885_dev *dev = chip->dev; | |
145 | dprintk(1, "Stopping audio DMA\n"); | |
146 | ||
147 | /* stop dma */ | |
148 | cx_clear(AUD_INT_DMA_CTL, 0x11); | |
149 | ||
150 | /* disable irqs */ | |
151 | cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); | |
152 | cx_clear(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | | |
153 | AUD_INT_DN_RISCI1); | |
154 | ||
155 | if (audio_debug) | |
156 | cx23885_sram_channel_dump(chip->dev, | |
157 | &dev->sram_channels[AUDIO_SRAM_CHANNEL]); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | /* | |
163 | * BOARD Specific: Handles audio IRQ | |
164 | */ | |
165 | int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask) | |
166 | { | |
167 | struct cx23885_audio_dev *chip = dev->audio_dev; | |
168 | ||
169 | if (0 == (status & mask)) | |
170 | return 0; | |
171 | ||
172 | cx_write(AUDIO_INT_INT_STAT, status); | |
173 | ||
174 | /* risc op code error */ | |
175 | if (status & AUD_INT_OPC_ERR) { | |
176 | printk(KERN_WARNING "%s/1: Audio risc op code error\n", | |
177 | dev->name); | |
178 | cx_clear(AUD_INT_DMA_CTL, 0x11); | |
179 | cx23885_sram_channel_dump(dev, | |
180 | &dev->sram_channels[AUDIO_SRAM_CHANNEL]); | |
181 | } | |
182 | if (status & AUD_INT_DN_SYNC) { | |
183 | dprintk(1, "Downstream sync error\n"); | |
184 | cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); | |
185 | return 1; | |
186 | } | |
187 | /* risc1 downstream */ | |
188 | if (status & AUD_INT_DN_RISCI1) { | |
189 | atomic_set(&chip->count, cx_read(AUD_INT_A_GPCNT)); | |
190 | snd_pcm_period_elapsed(chip->substream); | |
191 | } | |
192 | /* FIXME: Any other status should deserve a special handling? */ | |
193 | ||
194 | return 1; | |
195 | } | |
196 | ||
197 | static int dsp_buffer_free(struct cx23885_audio_dev *chip) | |
198 | { | |
199 | BUG_ON(!chip->dma_size); | |
200 | ||
201 | dprintk(2, "Freeing buffer\n"); | |
202 | videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc); | |
203 | videobuf_dma_free(chip->dma_risc); | |
204 | btcx_riscmem_free(chip->pci, &chip->buf->risc); | |
205 | kfree(chip->buf); | |
206 | ||
207 | chip->dma_risc = NULL; | |
208 | chip->dma_size = 0; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | /**************************************************************************** | |
214 | ALSA PCM Interface | |
215 | ****************************************************************************/ | |
216 | ||
217 | /* | |
218 | * Digital hardware definition | |
219 | */ | |
220 | #define DEFAULT_FIFO_SIZE 4096 | |
221 | ||
222 | static struct snd_pcm_hardware snd_cx23885_digital_hw = { | |
223 | .info = SNDRV_PCM_INFO_MMAP | | |
224 | SNDRV_PCM_INFO_INTERLEAVED | | |
225 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
226 | SNDRV_PCM_INFO_MMAP_VALID, | |
227 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
228 | ||
229 | .rates = SNDRV_PCM_RATE_48000, | |
230 | .rate_min = 48000, | |
231 | .rate_max = 48000, | |
232 | .channels_min = 2, | |
233 | .channels_max = 2, | |
234 | /* Analog audio output will be full of clicks and pops if there | |
235 | are not exactly four lines in the SRAM FIFO buffer. */ | |
236 | .period_bytes_min = DEFAULT_FIFO_SIZE/4, | |
237 | .period_bytes_max = DEFAULT_FIFO_SIZE/4, | |
238 | .periods_min = 1, | |
239 | .periods_max = 1024, | |
240 | .buffer_bytes_max = (1024*1024), | |
241 | }; | |
242 | ||
243 | /* | |
244 | * audio pcm capture open callback | |
245 | */ | |
246 | static int snd_cx23885_pcm_open(struct snd_pcm_substream *substream) | |
247 | { | |
248 | struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); | |
249 | struct snd_pcm_runtime *runtime = substream->runtime; | |
250 | int err; | |
251 | ||
252 | if (!chip) { | |
253 | printk(KERN_ERR "BUG: cx23885 can't find device struct." | |
254 | " Can't proceed with open\n"); | |
255 | return -ENODEV; | |
256 | } | |
257 | ||
258 | err = snd_pcm_hw_constraint_pow2(runtime, 0, | |
259 | SNDRV_PCM_HW_PARAM_PERIODS); | |
260 | if (err < 0) | |
261 | goto _error; | |
262 | ||
263 | chip->substream = substream; | |
264 | ||
265 | runtime->hw = snd_cx23885_digital_hw; | |
266 | ||
267 | if (chip->dev->sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != | |
268 | DEFAULT_FIFO_SIZE) { | |
269 | unsigned int bpl = chip->dev-> | |
270 | sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 4; | |
271 | bpl &= ~7; /* must be multiple of 8 */ | |
272 | runtime->hw.period_bytes_min = bpl; | |
273 | runtime->hw.period_bytes_max = bpl; | |
274 | } | |
275 | ||
276 | return 0; | |
277 | _error: | |
278 | dprintk(1, "Error opening PCM!\n"); | |
279 | return err; | |
280 | } | |
281 | ||
282 | /* | |
283 | * audio close callback | |
284 | */ | |
285 | static int snd_cx23885_close(struct snd_pcm_substream *substream) | |
286 | { | |
287 | return 0; | |
288 | } | |
289 | ||
290 | /* | |
291 | * hw_params callback | |
292 | */ | |
293 | static int snd_cx23885_hw_params(struct snd_pcm_substream *substream, | |
294 | struct snd_pcm_hw_params *hw_params) | |
295 | { | |
296 | struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); | |
297 | struct videobuf_dmabuf *dma; | |
298 | ||
299 | struct cx23885_audio_buffer *buf; | |
300 | int ret; | |
301 | ||
302 | if (substream->runtime->dma_area) { | |
303 | dsp_buffer_free(chip); | |
304 | substream->runtime->dma_area = NULL; | |
305 | } | |
306 | ||
307 | chip->period_size = params_period_bytes(hw_params); | |
308 | chip->num_periods = params_periods(hw_params); | |
309 | chip->dma_size = chip->period_size * params_periods(hw_params); | |
310 | ||
311 | BUG_ON(!chip->dma_size); | |
312 | BUG_ON(chip->num_periods & (chip->num_periods-1)); | |
313 | ||
314 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | |
315 | if (NULL == buf) | |
316 | return -ENOMEM; | |
317 | ||
318 | buf->bpl = chip->period_size; | |
319 | ||
320 | dma = &buf->dma; | |
321 | videobuf_dma_init(dma); | |
322 | ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, | |
323 | (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); | |
324 | if (ret < 0) | |
325 | goto error; | |
326 | ||
327 | ret = videobuf_dma_map(&chip->pci->dev, dma); | |
328 | if (ret < 0) | |
329 | goto error; | |
330 | ||
331 | ret = cx23885_risc_databuffer(chip->pci, &buf->risc, dma->sglist, | |
332 | chip->period_size, chip->num_periods, 1); | |
333 | if (ret < 0) | |
334 | goto error; | |
335 | ||
336 | /* Loop back to start of program */ | |
337 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC); | |
338 | buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); | |
339 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ | |
340 | ||
341 | chip->buf = buf; | |
342 | chip->dma_risc = dma; | |
343 | ||
344 | substream->runtime->dma_area = chip->dma_risc->vaddr; | |
345 | substream->runtime->dma_bytes = chip->dma_size; | |
346 | substream->runtime->dma_addr = 0; | |
347 | ||
348 | return 0; | |
349 | ||
350 | error: | |
351 | kfree(buf); | |
352 | return ret; | |
353 | } | |
354 | ||
355 | /* | |
356 | * hw free callback | |
357 | */ | |
358 | static int snd_cx23885_hw_free(struct snd_pcm_substream *substream) | |
359 | { | |
360 | ||
361 | struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); | |
362 | ||
363 | if (substream->runtime->dma_area) { | |
364 | dsp_buffer_free(chip); | |
365 | substream->runtime->dma_area = NULL; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | /* | |
372 | * prepare callback | |
373 | */ | |
374 | static int snd_cx23885_prepare(struct snd_pcm_substream *substream) | |
375 | { | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * trigger callback | |
381 | */ | |
382 | static int snd_cx23885_card_trigger(struct snd_pcm_substream *substream, | |
383 | int cmd) | |
384 | { | |
385 | struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); | |
386 | int err; | |
387 | ||
388 | /* Local interrupts are already disabled by ALSA */ | |
389 | spin_lock(&chip->lock); | |
390 | ||
391 | switch (cmd) { | |
392 | case SNDRV_PCM_TRIGGER_START: | |
393 | err = cx23885_start_audio_dma(chip); | |
394 | break; | |
395 | case SNDRV_PCM_TRIGGER_STOP: | |
396 | err = cx23885_stop_audio_dma(chip); | |
397 | break; | |
398 | default: | |
399 | err = -EINVAL; | |
400 | break; | |
401 | } | |
402 | ||
403 | spin_unlock(&chip->lock); | |
404 | ||
405 | return err; | |
406 | } | |
407 | ||
408 | /* | |
409 | * pointer callback | |
410 | */ | |
411 | static snd_pcm_uframes_t snd_cx23885_pointer( | |
412 | struct snd_pcm_substream *substream) | |
413 | { | |
414 | struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); | |
415 | struct snd_pcm_runtime *runtime = substream->runtime; | |
416 | u16 count; | |
417 | ||
418 | count = atomic_read(&chip->count); | |
419 | ||
420 | return runtime->period_size * (count & (runtime->periods-1)); | |
421 | } | |
422 | ||
423 | /* | |
424 | * page callback (needed for mmap) | |
425 | */ | |
426 | static struct page *snd_cx23885_page(struct snd_pcm_substream *substream, | |
427 | unsigned long offset) | |
428 | { | |
429 | void *pageptr = substream->runtime->dma_area + offset; | |
430 | return vmalloc_to_page(pageptr); | |
431 | } | |
432 | ||
433 | /* | |
434 | * operators | |
435 | */ | |
436 | static struct snd_pcm_ops snd_cx23885_pcm_ops = { | |
437 | .open = snd_cx23885_pcm_open, | |
438 | .close = snd_cx23885_close, | |
439 | .ioctl = snd_pcm_lib_ioctl, | |
440 | .hw_params = snd_cx23885_hw_params, | |
441 | .hw_free = snd_cx23885_hw_free, | |
442 | .prepare = snd_cx23885_prepare, | |
443 | .trigger = snd_cx23885_card_trigger, | |
444 | .pointer = snd_cx23885_pointer, | |
445 | .page = snd_cx23885_page, | |
446 | }; | |
447 | ||
448 | /* | |
449 | * create a PCM device | |
450 | */ | |
451 | static int snd_cx23885_pcm(struct cx23885_audio_dev *chip, int device, | |
452 | char *name) | |
453 | { | |
454 | int err; | |
455 | struct snd_pcm *pcm; | |
456 | ||
457 | err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); | |
458 | if (err < 0) | |
459 | return err; | |
460 | pcm->private_data = chip; | |
461 | strcpy(pcm->name, name); | |
462 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx23885_pcm_ops); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | /**************************************************************************** | |
468 | Basic Flow for Sound Devices | |
469 | ****************************************************************************/ | |
470 | ||
471 | /* | |
472 | * Alsa Constructor - Component probe | |
473 | */ | |
474 | ||
475 | struct cx23885_audio_dev *cx23885_audio_initdev(struct cx23885_dev *dev) | |
476 | { | |
477 | struct snd_card *card; | |
478 | struct cx23885_audio_dev *chip; | |
479 | int err; | |
480 | ||
481 | if (disable_analog_audio) | |
482 | return NULL; | |
483 | ||
484 | if (dev->sram_channels[AUDIO_SRAM_CHANNEL].cmds_start == 0) { | |
485 | printk(KERN_WARNING "%s(): Missing SRAM channel configuration " | |
486 | "for analog TV Audio\n", __func__); | |
487 | return NULL; | |
488 | } | |
489 | ||
490 | err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, | |
491 | THIS_MODULE, sizeof(struct cx23885_audio_dev), &card); | |
492 | if (err < 0) | |
493 | goto error; | |
494 | ||
495 | chip = (struct cx23885_audio_dev *) card->private_data; | |
496 | chip->dev = dev; | |
497 | chip->pci = dev->pci; | |
498 | chip->card = card; | |
499 | spin_lock_init(&chip->lock); | |
500 | ||
501 | snd_card_set_dev(card, &dev->pci->dev); | |
502 | ||
503 | err = snd_cx23885_pcm(chip, 0, "CX23885 Digital"); | |
504 | if (err < 0) | |
505 | goto error; | |
506 | ||
507 | strcpy(card->driver, "CX23885"); | |
508 | sprintf(card->shortname, "Conexant CX23885"); | |
509 | sprintf(card->longname, "%s at %s", card->shortname, dev->name); | |
510 | ||
511 | err = snd_card_register(card); | |
512 | if (err < 0) | |
513 | goto error; | |
514 | ||
515 | dprintk(0, "registered ALSA audio device\n"); | |
516 | ||
517 | return chip; | |
518 | ||
519 | error: | |
520 | snd_card_free(card); | |
521 | printk(KERN_ERR "%s(): Failed to register analog " | |
522 | "audio adapter\n", __func__); | |
523 | ||
524 | return NULL; | |
525 | } | |
526 | ||
527 | /* | |
528 | * ALSA destructor | |
529 | */ | |
530 | void cx23885_audio_finidev(struct cx23885_dev *dev) | |
531 | { | |
532 | struct cx23885_audio_dev *chip = dev->audio_dev; | |
533 | ||
534 | snd_card_free(chip->card); | |
535 | } |