diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/staging/cx25821/cx25821-alsa.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/staging/cx25821/cx25821-alsa.c')
-rw-r--r-- | drivers/staging/cx25821/cx25821-alsa.c | 795 |
1 files changed, 795 insertions, 0 deletions
diff --git a/drivers/staging/cx25821/cx25821-alsa.c b/drivers/staging/cx25821/cx25821-alsa.c new file mode 100644 index 00000000000..ebdba7c65bc --- /dev/null +++ b/drivers/staging/cx25821/cx25821-alsa.c | |||
@@ -0,0 +1,795 @@ | |||
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 int 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 | |||
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, | ||
180 | tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | | ||
181 | FLD_AUD_CLK_ENABLE); | ||
182 | |||
183 | /* | ||
184 | pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", | ||
185 | buf->bpl, audio_ch->cmds_start, | ||
186 | cx_read(audio_ch->cmds_start + 12)>>1, | ||
187 | chip->num_periods, buf->bpl * chip->num_periods); | ||
188 | */ | ||
189 | |||
190 | /* Enables corresponding bits at AUD_INT_STAT */ | ||
191 | cx_write(AUD_A_INT_MSK, | ||
192 | FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC | | ||
193 | FLD_AUD_DST_OPC_ERR); | ||
194 | |||
195 | /* Clean any pending interrupt bits already set */ | ||
196 | cx_write(AUD_A_INT_STAT, ~0); | ||
197 | |||
198 | /* enable audio irqs */ | ||
199 | cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); | ||
200 | |||
201 | /* Turn on audio downstream fifo and risc enable 0x101 */ | ||
202 | tmp = cx_read(AUD_INT_DMA_CTL); | ||
203 | cx_set(AUD_INT_DMA_CTL, | ||
204 | tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); | ||
205 | |||
206 | mdelay(100); | ||
207 | return 0; | ||
208 | } | ||
209 | |||
210 | /* | ||
211 | * BOARD Specific: Resets audio DMA | ||
212 | */ | ||
213 | static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) | ||
214 | { | ||
215 | struct cx25821_dev *dev = chip->dev; | ||
216 | |||
217 | /* stop dma */ | ||
218 | cx_clear(AUD_INT_DMA_CTL, | ||
219 | FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); | ||
220 | |||
221 | /* disable irqs */ | ||
222 | cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); | ||
223 | cx_clear(AUD_A_INT_MSK, | ||
224 | AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 | | ||
225 | AUD_INT_DN_RISCI1); | ||
226 | |||
227 | return 0; | ||
228 | } | ||
229 | |||
230 | #define MAX_IRQ_LOOP 50 | ||
231 | |||
232 | /* | ||
233 | * BOARD Specific: IRQ dma bits | ||
234 | */ | ||
235 | static char *cx25821_aud_irqs[32] = { | ||
236 | "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ | ||
237 | NULL, /* reserved */ | ||
238 | "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ | ||
239 | NULL, /* reserved */ | ||
240 | "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ | ||
241 | NULL, /* reserved */ | ||
242 | "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ | ||
243 | NULL, /* reserved */ | ||
244 | "opc_err", "par_err", "rip_err", /* 16-18 */ | ||
245 | "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ | ||
246 | }; | ||
247 | |||
248 | /* | ||
249 | * BOARD Specific: Threats IRQ audio specific calls | ||
250 | */ | ||
251 | static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, | ||
252 | u32 mask) | ||
253 | { | ||
254 | struct cx25821_dev *dev = chip->dev; | ||
255 | |||
256 | if (0 == (status & mask)) | ||
257 | return; | ||
258 | |||
259 | cx_write(AUD_A_INT_STAT, status); | ||
260 | if (debug > 1 || (status & mask & ~0xff)) | ||
261 | cx25821_print_irqbits(dev->name, "irq aud", | ||
262 | cx25821_aud_irqs, | ||
263 | ARRAY_SIZE(cx25821_aud_irqs), status, | ||
264 | mask); | ||
265 | |||
266 | /* risc op code error */ | ||
267 | if (status & AUD_INT_OPC_ERR) { | ||
268 | pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); | ||
269 | |||
270 | cx_clear(AUD_INT_DMA_CTL, | ||
271 | FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); | ||
272 | cx25821_sram_channel_dump_audio(dev, | ||
273 | &cx25821_sram_channels | ||
274 | [AUDIO_SRAM_CHANNEL]); | ||
275 | } | ||
276 | if (status & AUD_INT_DN_SYNC) { | ||
277 | pr_warn("WARNING %s: Downstream sync error!\n", dev->name); | ||
278 | cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); | ||
279 | return; | ||
280 | } | ||
281 | |||
282 | /* risc1 downstream */ | ||
283 | if (status & AUD_INT_DN_RISCI1) { | ||
284 | atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); | ||
285 | snd_pcm_period_elapsed(chip->substream); | ||
286 | } | ||
287 | } | ||
288 | |||
289 | /* | ||
290 | * BOARD Specific: Handles IRQ calls | ||
291 | */ | ||
292 | static irqreturn_t cx25821_irq(int irq, void *dev_id) | ||
293 | { | ||
294 | struct cx25821_audio_dev *chip = dev_id; | ||
295 | struct cx25821_dev *dev = chip->dev; | ||
296 | u32 status, pci_status; | ||
297 | u32 audint_status, audint_mask; | ||
298 | int loop, handled = 0; | ||
299 | int audint_count = 0; | ||
300 | |||
301 | audint_status = cx_read(AUD_A_INT_STAT); | ||
302 | audint_mask = cx_read(AUD_A_INT_MSK); | ||
303 | audint_count = cx_read(AUD_A_GPCNT); | ||
304 | status = cx_read(PCI_INT_STAT); | ||
305 | |||
306 | for (loop = 0; loop < 1; loop++) { | ||
307 | status = cx_read(PCI_INT_STAT); | ||
308 | if (0 == status) { | ||
309 | status = cx_read(PCI_INT_STAT); | ||
310 | audint_status = cx_read(AUD_A_INT_STAT); | ||
311 | audint_mask = cx_read(AUD_A_INT_MSK); | ||
312 | |||
313 | if (status) { | ||
314 | handled = 1; | ||
315 | cx_write(PCI_INT_STAT, status); | ||
316 | |||
317 | cx25821_aud_irq(chip, audint_status, | ||
318 | audint_mask); | ||
319 | break; | ||
320 | } else | ||
321 | goto out; | ||
322 | } | ||
323 | |||
324 | handled = 1; | ||
325 | cx_write(PCI_INT_STAT, status); | ||
326 | |||
327 | cx25821_aud_irq(chip, audint_status, audint_mask); | ||
328 | } | ||
329 | |||
330 | pci_status = cx_read(PCI_INT_STAT); | ||
331 | |||
332 | if (handled) | ||
333 | cx_write(PCI_INT_STAT, pci_status); | ||
334 | |||
335 | out: | ||
336 | return IRQ_RETVAL(handled); | ||
337 | } | ||
338 | |||
339 | static int dsp_buffer_free(struct cx25821_audio_dev *chip) | ||
340 | { | ||
341 | BUG_ON(!chip->dma_size); | ||
342 | |||
343 | dprintk(2, "Freeing buffer\n"); | ||
344 | videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc); | ||
345 | videobuf_dma_free(chip->dma_risc); | ||
346 | btcx_riscmem_free(chip->pci, &chip->buf->risc); | ||
347 | kfree(chip->buf); | ||
348 | |||
349 | chip->dma_risc = NULL; | ||
350 | chip->dma_size = 0; | ||
351 | |||
352 | return 0; | ||
353 | } | ||
354 | |||
355 | /**************************************************************************** | ||
356 | ALSA PCM Interface | ||
357 | ****************************************************************************/ | ||
358 | |||
359 | /* | ||
360 | * Digital hardware definition | ||
361 | */ | ||
362 | #define DEFAULT_FIFO_SIZE 384 | ||
363 | static struct snd_pcm_hardware snd_cx25821_digital_hw = { | ||
364 | .info = SNDRV_PCM_INFO_MMAP | | ||
365 | SNDRV_PCM_INFO_INTERLEAVED | | ||
366 | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID, | ||
367 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | ||
368 | |||
369 | .rates = SNDRV_PCM_RATE_48000, | ||
370 | .rate_min = 48000, | ||
371 | .rate_max = 48000, | ||
372 | .channels_min = 2, | ||
373 | .channels_max = 2, | ||
374 | /* Analog audio output will be full of clicks and pops if there | ||
375 | are not exactly four lines in the SRAM FIFO buffer. */ | ||
376 | .period_bytes_min = DEFAULT_FIFO_SIZE / 3, | ||
377 | .period_bytes_max = DEFAULT_FIFO_SIZE / 3, | ||
378 | .periods_min = 1, | ||
379 | .periods_max = AUDIO_LINE_SIZE, | ||
380 | /* 128 * 128 = 16384 = 1024 * 16 */ | ||
381 | .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), | ||
382 | }; | ||
383 | |||
384 | /* | ||
385 | * audio pcm capture open callback | ||
386 | */ | ||
387 | static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) | ||
388 | { | ||
389 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); | ||
390 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
391 | int err; | ||
392 | unsigned int bpl = 0; | ||
393 | |||
394 | if (!chip) { | ||
395 | pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n"); | ||
396 | return -ENODEV; | ||
397 | } | ||
398 | |||
399 | err = | ||
400 | snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); | ||
401 | if (err < 0) | ||
402 | goto _error; | ||
403 | |||
404 | chip->substream = substream; | ||
405 | |||
406 | runtime->hw = snd_cx25821_digital_hw; | ||
407 | |||
408 | if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != | ||
409 | DEFAULT_FIFO_SIZE) { | ||
410 | /* since there are 3 audio Clusters */ | ||
411 | bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; | ||
412 | bpl &= ~7; /* must be multiple of 8 */ | ||
413 | |||
414 | if (bpl > AUDIO_LINE_SIZE) | ||
415 | bpl = AUDIO_LINE_SIZE; | ||
416 | |||
417 | runtime->hw.period_bytes_min = bpl; | ||
418 | runtime->hw.period_bytes_max = bpl; | ||
419 | } | ||
420 | |||
421 | return 0; | ||
422 | _error: | ||
423 | dprintk(1, "Error opening PCM!\n"); | ||
424 | return err; | ||
425 | } | ||
426 | |||
427 | /* | ||
428 | * audio close callback | ||
429 | */ | ||
430 | static int snd_cx25821_close(struct snd_pcm_substream *substream) | ||
431 | { | ||
432 | return 0; | ||
433 | } | ||
434 | |||
435 | /* | ||
436 | * hw_params callback | ||
437 | */ | ||
438 | static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, | ||
439 | struct snd_pcm_hw_params *hw_params) | ||
440 | { | ||
441 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); | ||
442 | struct videobuf_dmabuf *dma; | ||
443 | |||
444 | struct cx25821_audio_buffer *buf; | ||
445 | int ret; | ||
446 | |||
447 | if (substream->runtime->dma_area) { | ||
448 | dsp_buffer_free(chip); | ||
449 | substream->runtime->dma_area = NULL; | ||
450 | } | ||
451 | |||
452 | chip->period_size = params_period_bytes(hw_params); | ||
453 | chip->num_periods = params_periods(hw_params); | ||
454 | chip->dma_size = chip->period_size * params_periods(hw_params); | ||
455 | |||
456 | BUG_ON(!chip->dma_size); | ||
457 | BUG_ON(chip->num_periods & (chip->num_periods - 1)); | ||
458 | |||
459 | buf = kzalloc(sizeof(*buf), GFP_KERNEL); | ||
460 | if (NULL == buf) | ||
461 | return -ENOMEM; | ||
462 | |||
463 | if (chip->period_size > AUDIO_LINE_SIZE) | ||
464 | chip->period_size = AUDIO_LINE_SIZE; | ||
465 | |||
466 | buf->bpl = chip->period_size; | ||
467 | |||
468 | dma = &buf->dma; | ||
469 | videobuf_dma_init(dma); | ||
470 | ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, | ||
471 | (PAGE_ALIGN(chip->dma_size) >> | ||
472 | PAGE_SHIFT)); | ||
473 | if (ret < 0) | ||
474 | goto error; | ||
475 | |||
476 | ret = videobuf_dma_map(&chip->pci->dev, dma); | ||
477 | if (ret < 0) | ||
478 | goto error; | ||
479 | |||
480 | ret = | ||
481 | cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist, | ||
482 | chip->period_size, chip->num_periods, | ||
483 | 1); | ||
484 | if (ret < 0) { | ||
485 | pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); | ||
486 | goto error; | ||
487 | } | ||
488 | |||
489 | /* Loop back to start of program */ | ||
490 | buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC); | ||
491 | buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); | ||
492 | buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ | ||
493 | |||
494 | chip->buf = buf; | ||
495 | chip->dma_risc = dma; | ||
496 | |||
497 | substream->runtime->dma_area = chip->dma_risc->vaddr; | ||
498 | substream->runtime->dma_bytes = chip->dma_size; | ||
499 | substream->runtime->dma_addr = 0; | ||
500 | |||
501 | return 0; | ||
502 | |||
503 | error: | ||
504 | kfree(buf); | ||
505 | return ret; | ||
506 | } | ||
507 | |||
508 | /* | ||
509 | * hw free callback | ||
510 | */ | ||
511 | static int snd_cx25821_hw_free(struct snd_pcm_substream *substream) | ||
512 | { | ||
513 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); | ||
514 | |||
515 | if (substream->runtime->dma_area) { | ||
516 | dsp_buffer_free(chip); | ||
517 | substream->runtime->dma_area = NULL; | ||
518 | } | ||
519 | |||
520 | return 0; | ||
521 | } | ||
522 | |||
523 | /* | ||
524 | * prepare callback | ||
525 | */ | ||
526 | static int snd_cx25821_prepare(struct snd_pcm_substream *substream) | ||
527 | { | ||
528 | return 0; | ||
529 | } | ||
530 | |||
531 | /* | ||
532 | * trigger callback | ||
533 | */ | ||
534 | static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, | ||
535 | int cmd) | ||
536 | { | ||
537 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); | ||
538 | int err = 0; | ||
539 | |||
540 | /* Local interrupts are already disabled by ALSA */ | ||
541 | spin_lock(&chip->reg_lock); | ||
542 | |||
543 | switch (cmd) { | ||
544 | case SNDRV_PCM_TRIGGER_START: | ||
545 | err = _cx25821_start_audio_dma(chip); | ||
546 | break; | ||
547 | case SNDRV_PCM_TRIGGER_STOP: | ||
548 | err = _cx25821_stop_audio_dma(chip); | ||
549 | break; | ||
550 | default: | ||
551 | err = -EINVAL; | ||
552 | break; | ||
553 | } | ||
554 | |||
555 | spin_unlock(&chip->reg_lock); | ||
556 | |||
557 | return err; | ||
558 | } | ||
559 | |||
560 | /* | ||
561 | * pointer callback | ||
562 | */ | ||
563 | static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream | ||
564 | *substream) | ||
565 | { | ||
566 | struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); | ||
567 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
568 | u16 count; | ||
569 | |||
570 | count = atomic_read(&chip->count); | ||
571 | |||
572 | return runtime->period_size * (count & (runtime->periods - 1)); | ||
573 | } | ||
574 | |||
575 | /* | ||
576 | * page callback (needed for mmap) | ||
577 | */ | ||
578 | static struct page *snd_cx25821_page(struct snd_pcm_substream *substream, | ||
579 | unsigned long offset) | ||
580 | { | ||
581 | void *pageptr = substream->runtime->dma_area + offset; | ||
582 | |||
583 | return vmalloc_to_page(pageptr); | ||
584 | } | ||
585 | |||
586 | /* | ||
587 | * operators | ||
588 | */ | ||
589 | static struct snd_pcm_ops snd_cx25821_pcm_ops = { | ||
590 | .open = snd_cx25821_pcm_open, | ||
591 | .close = snd_cx25821_close, | ||
592 | .ioctl = snd_pcm_lib_ioctl, | ||
593 | .hw_params = snd_cx25821_hw_params, | ||
594 | .hw_free = snd_cx25821_hw_free, | ||
595 | .prepare = snd_cx25821_prepare, | ||
596 | .trigger = snd_cx25821_card_trigger, | ||
597 | .pointer = snd_cx25821_pointer, | ||
598 | .page = snd_cx25821_page, | ||
599 | }; | ||
600 | |||
601 | /* | ||
602 | * ALSA create a PCM device: Called when initializing the board. | ||
603 | * Sets up the name and hooks up the callbacks | ||
604 | */ | ||
605 | static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, | ||
606 | char *name) | ||
607 | { | ||
608 | struct snd_pcm *pcm; | ||
609 | int err; | ||
610 | |||
611 | err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); | ||
612 | if (err < 0) { | ||
613 | pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); | ||
614 | return err; | ||
615 | } | ||
616 | pcm->private_data = chip; | ||
617 | pcm->info_flags = 0; | ||
618 | strcpy(pcm->name, name); | ||
619 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); | ||
620 | |||
621 | return 0; | ||
622 | } | ||
623 | |||
624 | /**************************************************************************** | ||
625 | Basic Flow for Sound Devices | ||
626 | ****************************************************************************/ | ||
627 | |||
628 | /* | ||
629 | * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio | ||
630 | * Only boards with eeprom and byte 1 at eeprom=1 have it | ||
631 | */ | ||
632 | |||
633 | static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = { | ||
634 | {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | ||
635 | {0,} | ||
636 | }; | ||
637 | |||
638 | MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); | ||
639 | |||
640 | /* | ||
641 | * Not used in the function snd_cx25821_dev_free so removing | ||
642 | * from the file. | ||
643 | */ | ||
644 | /* | ||
645 | static int snd_cx25821_free(struct cx25821_audio_dev *chip) | ||
646 | { | ||
647 | if (chip->irq >= 0) | ||
648 | free_irq(chip->irq, chip); | ||
649 | |||
650 | cx25821_dev_unregister(chip->dev); | ||
651 | pci_disable_device(chip->pci); | ||
652 | |||
653 | return 0; | ||
654 | } | ||
655 | */ | ||
656 | |||
657 | /* | ||
658 | * Component Destructor | ||
659 | */ | ||
660 | static void snd_cx25821_dev_free(struct snd_card *card) | ||
661 | { | ||
662 | struct cx25821_audio_dev *chip = card->private_data; | ||
663 | |||
664 | /* snd_cx25821_free(chip); */ | ||
665 | snd_card_free(chip->card); | ||
666 | } | ||
667 | |||
668 | /* | ||
669 | * Alsa Constructor - Component probe | ||
670 | */ | ||
671 | static int cx25821_audio_initdev(struct cx25821_dev *dev) | ||
672 | { | ||
673 | struct snd_card *card; | ||
674 | struct cx25821_audio_dev *chip; | ||
675 | int err; | ||
676 | |||
677 | if (devno >= SNDRV_CARDS) { | ||
678 | pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); | ||
679 | return -ENODEV; | ||
680 | } | ||
681 | |||
682 | if (!enable[devno]) { | ||
683 | ++devno; | ||
684 | pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); | ||
685 | return -ENOENT; | ||
686 | } | ||
687 | |||
688 | err = snd_card_create(index[devno], id[devno], THIS_MODULE, | ||
689 | sizeof(struct cx25821_audio_dev), &card); | ||
690 | if (err < 0) { | ||
691 | pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", | ||
692 | __func__); | ||
693 | return err; | ||
694 | } | ||
695 | |||
696 | strcpy(card->driver, "cx25821"); | ||
697 | |||
698 | /* Card "creation" */ | ||
699 | card->private_free = snd_cx25821_dev_free; | ||
700 | chip = card->private_data; | ||
701 | spin_lock_init(&chip->reg_lock); | ||
702 | |||
703 | chip->dev = dev; | ||
704 | chip->card = card; | ||
705 | chip->pci = dev->pci; | ||
706 | chip->iobase = pci_resource_start(dev->pci, 0); | ||
707 | |||
708 | chip->irq = dev->pci->irq; | ||
709 | |||
710 | err = request_irq(dev->pci->irq, cx25821_irq, | ||
711 | IRQF_SHARED | IRQF_DISABLED, chip->dev->name, chip); | ||
712 | |||
713 | if (err < 0) { | ||
714 | pr_err("ERROR %s: can't get IRQ %d for ALSA\n", | ||
715 | chip->dev->name, dev->pci->irq); | ||
716 | goto error; | ||
717 | } | ||
718 | |||
719 | err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); | ||
720 | if (err < 0) { | ||
721 | pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", | ||
722 | __func__); | ||
723 | goto error; | ||
724 | } | ||
725 | |||
726 | snd_card_set_dev(card, &chip->pci->dev); | ||
727 | |||
728 | strcpy(card->shortname, "cx25821"); | ||
729 | sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, | ||
730 | chip->iobase, chip->irq); | ||
731 | strcpy(card->mixername, "CX25821"); | ||
732 | |||
733 | pr_info("%s/%i: ALSA support for cx25821 boards\n", | ||
734 | card->driver, devno); | ||
735 | |||
736 | err = snd_card_register(card); | ||
737 | if (err < 0) { | ||
738 | pr_info("DEBUG ERROR: cannot register sound card %s\n", | ||
739 | __func__); | ||
740 | goto error; | ||
741 | } | ||
742 | |||
743 | snd_cx25821_cards[devno] = card; | ||
744 | |||
745 | devno++; | ||
746 | return 0; | ||
747 | |||
748 | error: | ||
749 | snd_card_free(card); | ||
750 | return err; | ||
751 | } | ||
752 | |||
753 | /**************************************************************************** | ||
754 | LINUX MODULE INIT | ||
755 | ****************************************************************************/ | ||
756 | static void cx25821_audio_fini(void) | ||
757 | { | ||
758 | snd_card_free(snd_cx25821_cards[0]); | ||
759 | } | ||
760 | |||
761 | /* | ||
762 | * Module initializer | ||
763 | * | ||
764 | * Loops through present saa7134 cards, and assigns an ALSA device | ||
765 | * to each one | ||
766 | * | ||
767 | */ | ||
768 | static int cx25821_alsa_init(void) | ||
769 | { | ||
770 | struct cx25821_dev *dev = NULL; | ||
771 | struct list_head *list; | ||
772 | |||
773 | mutex_lock(&cx25821_devlist_mutex); | ||
774 | list_for_each(list, &cx25821_devlist) { | ||
775 | dev = list_entry(list, struct cx25821_dev, devlist); | ||
776 | cx25821_audio_initdev(dev); | ||
777 | } | ||
778 | mutex_unlock(&cx25821_devlist_mutex); | ||
779 | |||
780 | if (dev == NULL) | ||
781 | pr_info("ERROR ALSA: no cx25821 cards found\n"); | ||
782 | |||
783 | return 0; | ||
784 | |||
785 | } | ||
786 | |||
787 | late_initcall(cx25821_alsa_init); | ||
788 | module_exit(cx25821_audio_fini); | ||
789 | |||
790 | /* ----------------------------------------------------------- */ | ||
791 | /* | ||
792 | * Local variables: | ||
793 | * c-basic-offset: 8 | ||
794 | * End: | ||
795 | */ | ||