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1 | /* |
2 | * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC |
3 | * |
4 | * Copyright (C) 2006-2007 Atmel Norway |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License version 2 as published by |
8 | * the Free Software Foundation. |
9 | */ |
10 | |
11 | /*#define DEBUG*/ |
12 | |
13 | #include <linux/clk.h> |
14 | #include <linux/err.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/device.h> |
17 | #include <linux/dma-mapping.h> |
18 | #include <linux/init.h> |
19 | #include <linux/interrupt.h> |
20 | #include <linux/module.h> |
21 | #include <linux/mutex.h> |
22 | #include <linux/platform_device.h> |
23 | #include <linux/io.h> |
24 | |
25 | #include <sound/initval.h> |
26 | #include <sound/control.h> |
27 | #include <sound/core.h> |
28 | #include <sound/pcm.h> |
29 | |
30 | #include <linux/atmel-ssc.h> |
31 | |
32 | #include <linux/spi/spi.h> |
33 | #include <linux/spi/at73c213.h> |
34 | |
35 | #include "at73c213.h" |
36 | |
37 | #define BITRATE_MIN 8000 /* Hardware limit? */ |
38 | #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE |
39 | #define BITRATE_MAX 50000 /* Hardware limit. */ |
40 | |
41 | /* Initial (hardware reset) AT73C213 register values. */ |
42 | static u8 snd_at73c213_original_image[18] = |
43 | { |
44 | 0x00, /* 00 - CTRL */ |
45 | 0x05, /* 01 - LLIG */ |
46 | 0x05, /* 02 - RLIG */ |
47 | 0x08, /* 03 - LPMG */ |
48 | 0x08, /* 04 - RPMG */ |
49 | 0x00, /* 05 - LLOG */ |
50 | 0x00, /* 06 - RLOG */ |
51 | 0x22, /* 07 - OLC */ |
52 | 0x09, /* 08 - MC */ |
53 | 0x00, /* 09 - CSFC */ |
54 | 0x00, /* 0A - MISC */ |
55 | 0x00, /* 0B - */ |
56 | 0x00, /* 0C - PRECH */ |
57 | 0x05, /* 0D - AUXG */ |
58 | 0x00, /* 0E - */ |
59 | 0x00, /* 0F - */ |
60 | 0x00, /* 10 - RST */ |
61 | 0x00, /* 11 - PA_CTRL */ |
62 | }; |
63 | |
64 | struct snd_at73c213 { |
65 | struct snd_card *card; |
66 | struct snd_pcm *pcm; |
67 | struct snd_pcm_substream *substream; |
68 | struct at73c213_board_info *board; |
69 | int irq; |
70 | int period; |
71 | unsigned long bitrate; |
72 | struct clk *bitclk; |
73 | struct ssc_device *ssc; |
74 | struct spi_device *spi; |
75 | u8 spi_wbuffer[2]; |
76 | u8 spi_rbuffer[2]; |
77 | /* Image of the SPI registers in AT73C213. */ |
78 | u8 reg_image[18]; |
79 | /* Protect SSC registers against concurrent access. */ |
80 | spinlock_t lock; |
81 | /* Protect mixer registers against concurrent access. */ |
82 | struct mutex mixer_lock; |
83 | }; |
84 | |
85 | #define get_chip(card) ((struct snd_at73c213 *)card->private_data) |
86 | |
87 | static int |
88 | snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val) |
89 | { |
90 | struct spi_message msg; |
91 | struct spi_transfer msg_xfer = { |
92 | .len = 2, |
93 | .cs_change = 0, |
94 | }; |
95 | int retval; |
96 | |
97 | spi_message_init(&msg); |
98 | |
99 | chip->spi_wbuffer[0] = reg; |
100 | chip->spi_wbuffer[1] = val; |
101 | |
102 | msg_xfer.tx_buf = chip->spi_wbuffer; |
103 | msg_xfer.rx_buf = chip->spi_rbuffer; |
104 | spi_message_add_tail(&msg_xfer, &msg); |
105 | |
106 | retval = spi_sync(chip->spi, &msg); |
107 | |
108 | if (!retval) |
109 | chip->reg_image[reg] = val; |
110 | |
111 | return retval; |
112 | } |
113 | |
114 | static struct snd_pcm_hardware snd_at73c213_playback_hw = { |
115 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
116 | SNDRV_PCM_INFO_BLOCK_TRANSFER, |
117 | .formats = SNDRV_PCM_FMTBIT_S16_BE, |
118 | .rates = SNDRV_PCM_RATE_CONTINUOUS, |
119 | .rate_min = 8000, /* Replaced by chip->bitrate later. */ |
120 | .rate_max = 50000, /* Replaced by chip->bitrate later. */ |
121 | .channels_min = 1, |
122 | .channels_max = 2, |
123 | .buffer_bytes_max = 64 * 1024 - 1, |
124 | .period_bytes_min = 512, |
125 | .period_bytes_max = 64 * 1024 - 1, |
126 | .periods_min = 4, |
127 | .periods_max = 1024, |
128 | }; |
129 | |
130 | /* |
131 | * Calculate and set bitrate and divisions. |
132 | */ |
133 | static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) |
134 | { |
135 | unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); |
136 | unsigned long dac_rate_new, ssc_div; |
137 | int status; |
138 | unsigned long ssc_div_max, ssc_div_min; |
139 | int max_tries; |
140 | |
141 | /* |
142 | * We connect two clocks here, picking divisors so the I2S clocks |
143 | * out data at the same rate the DAC clocks it in ... and as close |
144 | * as practical to the desired target rate. |
145 | * |
146 | * The DAC master clock (MCLK) is programmable, and is either 256 |
147 | * or (not here) 384 times the I2S output clock (BCLK). |
148 | */ |
149 | |
150 | /* SSC clock / (bitrate * stereo * 16-bit). */ |
151 | ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); |
152 | ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); |
153 | ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); |
154 | max_tries = (ssc_div_max - ssc_div_min) / 2; |
155 | |
156 | if (max_tries < 1) |
157 | max_tries = 1; |
158 | |
159 | /* ssc_div must be a power of 2. */ |
160 | ssc_div = (ssc_div + 1) & ~1UL; |
161 | |
162 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { |
163 | ssc_div -= 2; |
164 | if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) |
165 | return -ENXIO; |
166 | } |
167 | |
168 | /* Search for a possible bitrate. */ |
169 | do { |
170 | /* SSC clock / (ssc divider * 16-bit * stereo). */ |
171 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) |
172 | return -ENXIO; |
173 | |
174 | /* 256 / (2 * 16) = 8 */ |
175 | dac_rate_new = 8 * (ssc_rate / ssc_div); |
176 | |
177 | status = clk_round_rate(chip->board->dac_clk, dac_rate_new); |
178 | if (status < 0) |
179 | return status; |
180 | |
181 | /* Ignore difference smaller than 256 Hz. */ |
182 | if ((status/256) == (dac_rate_new/256)) |
183 | goto set_rate; |
184 | |
185 | ssc_div += 2; |
186 | } while (--max_tries); |
187 | |
188 | /* Not able to find a valid bitrate. */ |
189 | return -ENXIO; |
190 | |
191 | set_rate: |
192 | status = clk_set_rate(chip->board->dac_clk, status); |
193 | if (status < 0) |
194 | return status; |
195 | |
196 | /* Set divider in SSC device. */ |
197 | ssc_writel(chip->ssc->regs, CMR, ssc_div/2); |
198 | |
199 | /* SSC clock / (ssc divider * 16-bit * stereo). */ |
200 | chip->bitrate = ssc_rate / (ssc_div * 16 * 2); |
201 | |
202 | dev_info(&chip->spi->dev, |
203 | "at73c213: supported bitrate is %lu (%lu divider)\n", |
204 | chip->bitrate, ssc_div); |
205 | |
206 | return 0; |
207 | } |
208 | |
209 | static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) |
210 | { |
211 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
212 | struct snd_pcm_runtime *runtime = substream->runtime; |
213 | int err; |
214 | |
215 | /* ensure buffer_size is a multiple of period_size */ |
216 | err = snd_pcm_hw_constraint_integer(runtime, |
217 | SNDRV_PCM_HW_PARAM_PERIODS); |
218 | if (err < 0) |
219 | return err; |
220 | snd_at73c213_playback_hw.rate_min = chip->bitrate; |
221 | snd_at73c213_playback_hw.rate_max = chip->bitrate; |
222 | runtime->hw = snd_at73c213_playback_hw; |
223 | chip->substream = substream; |
224 | |
225 | return 0; |
226 | } |
227 | |
228 | static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) |
229 | { |
230 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
231 | chip->substream = NULL; |
232 | return 0; |
233 | } |
234 | |
235 | static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, |
236 | struct snd_pcm_hw_params *hw_params) |
237 | { |
238 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
239 | int channels = params_channels(hw_params); |
240 | int val; |
241 | |
242 | val = ssc_readl(chip->ssc->regs, TFMR); |
243 | val = SSC_BFINS(TFMR_DATNB, channels - 1, val); |
244 | ssc_writel(chip->ssc->regs, TFMR, val); |
245 | |
246 | return snd_pcm_lib_malloc_pages(substream, |
247 | params_buffer_bytes(hw_params)); |
248 | } |
249 | |
250 | static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream) |
251 | { |
252 | return snd_pcm_lib_free_pages(substream); |
253 | } |
254 | |
255 | static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) |
256 | { |
257 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
258 | struct snd_pcm_runtime *runtime = substream->runtime; |
259 | int block_size; |
260 | |
261 | block_size = frames_to_bytes(runtime, runtime->period_size); |
262 | |
263 | chip->period = 0; |
264 | |
265 | ssc_writel(chip->ssc->regs, PDC_TPR, |
266 | (long)runtime->dma_addr); |
267 | ssc_writel(chip->ssc->regs, PDC_TCR, |
268 | runtime->period_size * runtime->channels); |
269 | ssc_writel(chip->ssc->regs, PDC_TNPR, |
270 | (long)runtime->dma_addr + block_size); |
271 | ssc_writel(chip->ssc->regs, PDC_TNCR, |
272 | runtime->period_size * runtime->channels); |
273 | |
274 | return 0; |
275 | } |
276 | |
277 | static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, |
278 | int cmd) |
279 | { |
280 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
281 | int retval = 0; |
282 | |
283 | spin_lock(&chip->lock); |
284 | |
285 | switch (cmd) { |
286 | case SNDRV_PCM_TRIGGER_START: |
287 | ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); |
288 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); |
289 | break; |
290 | case SNDRV_PCM_TRIGGER_STOP: |
291 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); |
292 | ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); |
293 | break; |
294 | default: |
295 | dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); |
296 | retval = -EINVAL; |
297 | break; |
298 | } |
299 | |
300 | spin_unlock(&chip->lock); |
301 | |
302 | return retval; |
303 | } |
304 | |
305 | static snd_pcm_uframes_t |
306 | snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) |
307 | { |
308 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
309 | struct snd_pcm_runtime *runtime = substream->runtime; |
310 | snd_pcm_uframes_t pos; |
311 | unsigned long bytes; |
312 | |
313 | bytes = ssc_readl(chip->ssc->regs, PDC_TPR) |
314 | - (unsigned long)runtime->dma_addr; |
315 | |
316 | pos = bytes_to_frames(runtime, bytes); |
317 | if (pos >= runtime->buffer_size) |
318 | pos -= runtime->buffer_size; |
319 | |
320 | return pos; |
321 | } |
322 | |
323 | static struct snd_pcm_ops at73c213_playback_ops = { |
324 | .open = snd_at73c213_pcm_open, |
325 | .close = snd_at73c213_pcm_close, |
326 | .ioctl = snd_pcm_lib_ioctl, |
327 | .hw_params = snd_at73c213_pcm_hw_params, |
328 | .hw_free = snd_at73c213_pcm_hw_free, |
329 | .prepare = snd_at73c213_pcm_prepare, |
330 | .trigger = snd_at73c213_pcm_trigger, |
331 | .pointer = snd_at73c213_pcm_pointer, |
332 | }; |
333 | |
334 | static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) |
335 | { |
336 | struct snd_pcm *pcm; |
337 | int retval; |
338 | |
339 | retval = snd_pcm_new(chip->card, chip->card->shortname, |
340 | device, 1, 0, &pcm); |
341 | if (retval < 0) |
342 | goto out; |
343 | |
344 | pcm->private_data = chip; |
345 | pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; |
346 | strcpy(pcm->name, "at73c213"); |
347 | chip->pcm = pcm; |
348 | |
349 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); |
350 | |
351 | retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm, |
352 | SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, |
353 | 64 * 1024, 64 * 1024); |
354 | out: |
355 | return retval; |
356 | } |
357 | |
358 | static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) |
359 | { |
360 | struct snd_at73c213 *chip = dev_id; |
361 | struct snd_pcm_runtime *runtime = chip->substream->runtime; |
362 | u32 status; |
363 | int offset; |
364 | int block_size; |
365 | int next_period; |
366 | int retval = IRQ_NONE; |
367 | |
368 | spin_lock(&chip->lock); |
369 | |
370 | block_size = frames_to_bytes(runtime, runtime->period_size); |
371 | status = ssc_readl(chip->ssc->regs, IMR); |
372 | |
373 | if (status & SSC_BIT(IMR_ENDTX)) { |
374 | chip->period++; |
375 | if (chip->period == runtime->periods) |
376 | chip->period = 0; |
377 | next_period = chip->period + 1; |
378 | if (next_period == runtime->periods) |
379 | next_period = 0; |
380 | |
381 | offset = block_size * next_period; |
382 | |
383 | ssc_writel(chip->ssc->regs, PDC_TNPR, |
384 | (long)runtime->dma_addr + offset); |
385 | ssc_writel(chip->ssc->regs, PDC_TNCR, |
386 | runtime->period_size * runtime->channels); |
387 | retval = IRQ_HANDLED; |
388 | } |
389 | |
390 | ssc_readl(chip->ssc->regs, IMR); |
391 | spin_unlock(&chip->lock); |
392 | |
393 | if (status & SSC_BIT(IMR_ENDTX)) |
394 | snd_pcm_period_elapsed(chip->substream); |
395 | |
396 | return retval; |
397 | } |
398 | |
399 | /* |
400 | * Mixer functions. |
401 | */ |
402 | static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, |
403 | struct snd_ctl_elem_value *ucontrol) |
404 | { |
405 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
406 | int reg = kcontrol->private_value & 0xff; |
407 | int shift = (kcontrol->private_value >> 8) & 0xff; |
408 | int mask = (kcontrol->private_value >> 16) & 0xff; |
409 | int invert = (kcontrol->private_value >> 24) & 0xff; |
410 | |
411 | mutex_lock(&chip->mixer_lock); |
412 | |
413 | ucontrol->value.integer.value[0] = |
414 | (chip->reg_image[reg] >> shift) & mask; |
415 | |
416 | if (invert) |
417 | ucontrol->value.integer.value[0] = |
418 | mask - ucontrol->value.integer.value[0]; |
419 | |
420 | mutex_unlock(&chip->mixer_lock); |
421 | |
422 | return 0; |
423 | } |
424 | |
425 | static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, |
426 | struct snd_ctl_elem_value *ucontrol) |
427 | { |
428 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
429 | int reg = kcontrol->private_value & 0xff; |
430 | int shift = (kcontrol->private_value >> 8) & 0xff; |
431 | int mask = (kcontrol->private_value >> 16) & 0xff; |
432 | int invert = (kcontrol->private_value >> 24) & 0xff; |
433 | int change, retval; |
434 | unsigned short val; |
435 | |
436 | val = (ucontrol->value.integer.value[0] & mask); |
437 | if (invert) |
438 | val = mask - val; |
439 | val <<= shift; |
440 | |
441 | mutex_lock(&chip->mixer_lock); |
442 | |
443 | val = (chip->reg_image[reg] & ~(mask << shift)) | val; |
444 | change = val != chip->reg_image[reg]; |
445 | retval = snd_at73c213_write_reg(chip, reg, val); |
446 | |
447 | mutex_unlock(&chip->mixer_lock); |
448 | |
449 | if (retval) |
450 | return retval; |
451 | |
452 | return change; |
453 | } |
454 | |
455 | static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, |
456 | struct snd_ctl_elem_info *uinfo) |
457 | { |
458 | int mask = (kcontrol->private_value >> 24) & 0xff; |
459 | |
460 | if (mask == 1) |
461 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
462 | else |
463 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
464 | |
465 | uinfo->count = 2; |
466 | uinfo->value.integer.min = 0; |
467 | uinfo->value.integer.max = mask; |
468 | |
469 | return 0; |
470 | } |
471 | |
472 | static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, |
473 | struct snd_ctl_elem_value *ucontrol) |
474 | { |
475 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
476 | int left_reg = kcontrol->private_value & 0xff; |
477 | int right_reg = (kcontrol->private_value >> 8) & 0xff; |
478 | int shift_left = (kcontrol->private_value >> 16) & 0x07; |
479 | int shift_right = (kcontrol->private_value >> 19) & 0x07; |
480 | int mask = (kcontrol->private_value >> 24) & 0xff; |
481 | int invert = (kcontrol->private_value >> 22) & 1; |
482 | |
483 | mutex_lock(&chip->mixer_lock); |
484 | |
485 | ucontrol->value.integer.value[0] = |
486 | (chip->reg_image[left_reg] >> shift_left) & mask; |
487 | ucontrol->value.integer.value[1] = |
488 | (chip->reg_image[right_reg] >> shift_right) & mask; |
489 | |
490 | if (invert) { |
491 | ucontrol->value.integer.value[0] = |
492 | mask - ucontrol->value.integer.value[0]; |
493 | ucontrol->value.integer.value[1] = |
494 | mask - ucontrol->value.integer.value[1]; |
495 | } |
496 | |
497 | mutex_unlock(&chip->mixer_lock); |
498 | |
499 | return 0; |
500 | } |
501 | |
502 | static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, |
503 | struct snd_ctl_elem_value *ucontrol) |
504 | { |
505 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
506 | int left_reg = kcontrol->private_value & 0xff; |
507 | int right_reg = (kcontrol->private_value >> 8) & 0xff; |
508 | int shift_left = (kcontrol->private_value >> 16) & 0x07; |
509 | int shift_right = (kcontrol->private_value >> 19) & 0x07; |
510 | int mask = (kcontrol->private_value >> 24) & 0xff; |
511 | int invert = (kcontrol->private_value >> 22) & 1; |
512 | int change, retval; |
513 | unsigned short val1, val2; |
514 | |
515 | val1 = ucontrol->value.integer.value[0] & mask; |
516 | val2 = ucontrol->value.integer.value[1] & mask; |
517 | if (invert) { |
518 | val1 = mask - val1; |
519 | val2 = mask - val2; |
520 | } |
521 | val1 <<= shift_left; |
522 | val2 <<= shift_right; |
523 | |
524 | mutex_lock(&chip->mixer_lock); |
525 | |
526 | val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; |
527 | val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; |
528 | change = val1 != chip->reg_image[left_reg] |
529 | || val2 != chip->reg_image[right_reg]; |
530 | retval = snd_at73c213_write_reg(chip, left_reg, val1); |
531 | if (retval) { |
532 | mutex_unlock(&chip->mixer_lock); |
533 | goto out; |
534 | } |
535 | retval = snd_at73c213_write_reg(chip, right_reg, val2); |
536 | if (retval) { |
537 | mutex_unlock(&chip->mixer_lock); |
538 | goto out; |
539 | } |
540 | |
541 | mutex_unlock(&chip->mixer_lock); |
542 | |
543 | return change; |
544 | |
545 | out: |
546 | return retval; |
547 | } |
548 | |
549 | #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info |
550 | |
551 | static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol, |
552 | struct snd_ctl_elem_value *ucontrol) |
553 | { |
554 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
555 | int reg = kcontrol->private_value & 0xff; |
556 | int shift = (kcontrol->private_value >> 8) & 0xff; |
557 | int invert = (kcontrol->private_value >> 24) & 0xff; |
558 | |
559 | mutex_lock(&chip->mixer_lock); |
560 | |
561 | ucontrol->value.integer.value[0] = |
562 | (chip->reg_image[reg] >> shift) & 0x01; |
563 | |
564 | if (invert) |
565 | ucontrol->value.integer.value[0] = |
566 | 0x01 - ucontrol->value.integer.value[0]; |
567 | |
568 | mutex_unlock(&chip->mixer_lock); |
569 | |
570 | return 0; |
571 | } |
572 | |
573 | static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol, |
574 | struct snd_ctl_elem_value *ucontrol) |
575 | { |
576 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); |
577 | int reg = kcontrol->private_value & 0xff; |
578 | int shift = (kcontrol->private_value >> 8) & 0xff; |
579 | int mask = (kcontrol->private_value >> 16) & 0xff; |
580 | int invert = (kcontrol->private_value >> 24) & 0xff; |
581 | int change, retval; |
582 | unsigned short val; |
583 | |
584 | if (ucontrol->value.integer.value[0]) |
585 | val = mask; |
586 | else |
587 | val = 0; |
588 | |
589 | if (invert) |
590 | val = mask - val; |
591 | val <<= shift; |
592 | |
593 | mutex_lock(&chip->mixer_lock); |
594 | |
595 | val |= (chip->reg_image[reg] & ~(mask << shift)); |
596 | change = val != chip->reg_image[reg]; |
597 | |
598 | retval = snd_at73c213_write_reg(chip, reg, val); |
599 | |
600 | mutex_unlock(&chip->mixer_lock); |
601 | |
602 | if (retval) |
603 | return retval; |
604 | |
605 | return change; |
606 | } |
607 | |
608 | static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol, |
609 | struct snd_ctl_elem_info *uinfo) |
610 | { |
611 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
612 | uinfo->count = 1; |
613 | uinfo->value.integer.min = 0; |
614 | uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1; |
615 | |
616 | return 0; |
617 | } |
618 | |
619 | static int snd_at73c213_line_capture_volume_info( |
620 | struct snd_kcontrol *kcontrol, |
621 | struct snd_ctl_elem_info *uinfo) |
622 | { |
623 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
624 | uinfo->count = 2; |
625 | /* When inverted will give values 0x10001 => 0. */ |
626 | uinfo->value.integer.min = 14; |
627 | uinfo->value.integer.max = 31; |
628 | |
629 | return 0; |
630 | } |
631 | |
632 | static int snd_at73c213_aux_capture_volume_info( |
633 | struct snd_kcontrol *kcontrol, |
634 | struct snd_ctl_elem_info *uinfo) |
635 | { |
636 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
637 | uinfo->count = 1; |
638 | /* When inverted will give values 0x10001 => 0. */ |
639 | uinfo->value.integer.min = 14; |
640 | uinfo->value.integer.max = 31; |
641 | |
642 | return 0; |
643 | } |
644 | |
645 | #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \ |
646 | { \ |
647 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
648 | .name = xname, \ |
649 | .index = xindex, \ |
650 | .info = snd_at73c213_mono_switch_info, \ |
651 | .get = snd_at73c213_mono_switch_get, \ |
652 | .put = snd_at73c213_mono_switch_put, \ |
653 | .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \ |
654 | } |
655 | |
656 | #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \ |
657 | { \ |
658 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ |
659 | .name = xname, \ |
660 | .index = xindex, \ |
661 | .info = snd_at73c213_stereo_info, \ |
662 | .get = snd_at73c213_stereo_get, \ |
663 | .put = snd_at73c213_stereo_put, \ |
664 | .private_value = (left_reg | (right_reg << 8) \ |
665 | | (shift_left << 16) | (shift_right << 19) \ |
666 | | (mask << 24) | (invert << 22)) \ |
667 | } |
668 | |
669 | static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = { |
670 | AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1), |
671 | AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1), |
672 | AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1), |
673 | AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1), |
674 | AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV, |
675 | 0x01, 0), |
676 | { |
677 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
678 | .name = "PA Playback Volume", |
679 | .index = 0, |
680 | .info = snd_at73c213_pa_volume_info, |
681 | .get = snd_at73c213_mono_get, |
682 | .put = snd_at73c213_mono_put, |
683 | .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \ |
684 | (0x0f << 16) | (1 << 24), |
685 | }, |
686 | AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP, |
687 | 0x01, 1), |
688 | AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0), |
689 | { |
690 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
691 | .name = "Aux Capture Volume", |
692 | .index = 0, |
693 | .info = snd_at73c213_aux_capture_volume_info, |
694 | .get = snd_at73c213_mono_get, |
695 | .put = snd_at73c213_mono_put, |
696 | .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24), |
697 | }, |
698 | AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN, |
699 | 0x01, 0), |
700 | { |
701 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
702 | .name = "Line Capture Volume", |
703 | .index = 0, |
704 | .info = snd_at73c213_line_capture_volume_info, |
705 | .get = snd_at73c213_stereo_get, |
706 | .put = snd_at73c213_stereo_put, |
707 | .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19) |
708 | | (0x1f << 24) | (1 << 22), |
709 | }, |
710 | AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0), |
711 | }; |
712 | |
713 | static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip) |
714 | { |
715 | struct snd_card *card; |
716 | int errval, idx; |
717 | |
718 | if (chip == NULL || chip->pcm == NULL) |
719 | return -EINVAL; |
720 | |
721 | card = chip->card; |
722 | |
723 | strcpy(card->mixername, chip->pcm->name); |
724 | |
725 | for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) { |
726 | errval = snd_ctl_add(card, |
727 | snd_ctl_new1(&snd_at73c213_controls[idx], |
728 | chip)); |
729 | if (errval < 0) |
730 | goto cleanup; |
731 | } |
732 | |
733 | return 0; |
734 | |
735 | cleanup: |
736 | for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) { |
737 | struct snd_kcontrol *kctl; |
738 | kctl = snd_ctl_find_numid(card, idx); |
739 | if (kctl) |
740 | snd_ctl_remove(card, kctl); |
741 | } |
742 | return errval; |
743 | } |
744 | |
745 | /* |
746 | * Device functions |
747 | */ |
748 | static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip) |
749 | { |
750 | /* |
751 | * Continuous clock output. |
752 | * Starts on falling TF. |
753 | * Delay 1 cycle (1 bit). |
754 | * Periode is 16 bit (16 - 1). |
755 | */ |
756 | ssc_writel(chip->ssc->regs, TCMR, |
757 | SSC_BF(TCMR_CKO, 1) |
758 | | SSC_BF(TCMR_START, 4) |
759 | | SSC_BF(TCMR_STTDLY, 1) |
760 | | SSC_BF(TCMR_PERIOD, 16 - 1)); |
761 | /* |
762 | * Data length is 16 bit (16 - 1). |
763 | * Transmit MSB first. |
764 | * Transmit 2 words each transfer. |
765 | * Frame sync length is 16 bit (16 - 1). |
766 | * Frame starts on negative pulse. |
767 | */ |
768 | ssc_writel(chip->ssc->regs, TFMR, |
769 | SSC_BF(TFMR_DATLEN, 16 - 1) |
770 | | SSC_BIT(TFMR_MSBF) |
771 | | SSC_BF(TFMR_DATNB, 1) |
772 | | SSC_BF(TFMR_FSLEN, 16 - 1) |
773 | | SSC_BF(TFMR_FSOS, 1)); |
774 | |
775 | return 0; |
776 | } |
777 | |
778 | static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip) |
779 | { |
780 | int retval; |
781 | unsigned char dac_ctrl = 0; |
782 | |
783 | retval = snd_at73c213_set_bitrate(chip); |
784 | if (retval) |
785 | goto out; |
786 | |
787 | /* Enable DAC master clock. */ |
788 | clk_enable(chip->board->dac_clk); |
789 | |
790 | /* Initialize at73c213 on SPI bus. */ |
791 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); |
792 | if (retval) |
793 | goto out_clk; |
794 | msleep(1); |
795 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03); |
796 | if (retval) |
797 | goto out_clk; |
798 | |
799 | /* Precharge everything. */ |
800 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff); |
801 | if (retval) |
802 | goto out_clk; |
803 | retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH)); |
804 | if (retval) |
805 | goto out_clk; |
806 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, |
807 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR)); |
808 | if (retval) |
809 | goto out_clk; |
810 | |
811 | msleep(50); |
812 | |
813 | /* Stop precharging PA. */ |
814 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
815 | (1<<PA_CTRL_APALP) | 0x0f); |
816 | if (retval) |
817 | goto out_clk; |
818 | |
819 | msleep(450); |
820 | |
821 | /* Stop precharging DAC, turn on master power. */ |
822 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR)); |
823 | if (retval) |
824 | goto out_clk; |
825 | |
826 | msleep(1); |
827 | |
828 | /* Turn on DAC. */ |
829 | dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR) |
830 | | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR); |
831 | |
832 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl); |
833 | if (retval) |
834 | goto out_clk; |
835 | |
836 | /* Mute sound. */ |
837 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
838 | if (retval) |
839 | goto out_clk; |
840 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
841 | if (retval) |
842 | goto out_clk; |
843 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
844 | if (retval) |
845 | goto out_clk; |
846 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
847 | if (retval) |
848 | goto out_clk; |
849 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
850 | if (retval) |
851 | goto out_clk; |
852 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
853 | if (retval) |
854 | goto out_clk; |
855 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
856 | if (retval) |
857 | goto out_clk; |
858 | |
859 | /* Enable I2S device, i.e. clock output. */ |
860 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
861 | |
862 | goto out; |
863 | |
864 | out_clk: |
865 | clk_disable(chip->board->dac_clk); |
866 | out: |
867 | return retval; |
868 | } |
869 | |
870 | static int snd_at73c213_dev_free(struct snd_device *device) |
871 | { |
872 | struct snd_at73c213 *chip = device->device_data; |
873 | |
874 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
875 | if (chip->irq >= 0) { |
876 | free_irq(chip->irq, chip); |
877 | chip->irq = -1; |
878 | } |
879 | |
880 | return 0; |
881 | } |
882 | |
883 | static int __devinit snd_at73c213_dev_init(struct snd_card *card, |
884 | struct spi_device *spi) |
885 | { |
886 | static struct snd_device_ops ops = { |
887 | .dev_free = snd_at73c213_dev_free, |
888 | }; |
889 | struct snd_at73c213 *chip = get_chip(card); |
890 | int irq, retval; |
891 | |
892 | irq = chip->ssc->irq; |
893 | if (irq < 0) |
894 | return irq; |
895 | |
896 | spin_lock_init(&chip->lock); |
897 | mutex_init(&chip->mixer_lock); |
898 | chip->card = card; |
899 | chip->irq = -1; |
900 | |
901 | retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); |
902 | if (retval) { |
903 | dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); |
904 | goto out; |
905 | } |
906 | chip->irq = irq; |
907 | |
908 | memcpy(&chip->reg_image, &snd_at73c213_original_image, |
909 | sizeof(snd_at73c213_original_image)); |
910 | |
911 | retval = snd_at73c213_ssc_init(chip); |
912 | if (retval) |
913 | goto out_irq; |
914 | |
915 | retval = snd_at73c213_chip_init(chip); |
916 | if (retval) |
917 | goto out_irq; |
918 | |
919 | retval = snd_at73c213_pcm_new(chip, 0); |
920 | if (retval) |
921 | goto out_irq; |
922 | |
923 | retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); |
924 | if (retval) |
925 | goto out_irq; |
926 | |
927 | retval = snd_at73c213_mixer(chip); |
928 | if (retval) |
929 | goto out_snd_dev; |
930 | |
931 | snd_card_set_dev(card, &spi->dev); |
932 | |
933 | goto out; |
934 | |
935 | out_snd_dev: |
936 | snd_device_free(card, chip); |
937 | out_irq: |
938 | free_irq(chip->irq, chip); |
939 | chip->irq = -1; |
940 | out: |
941 | return retval; |
942 | } |
943 | |
944 | static int __devinit snd_at73c213_probe(struct spi_device *spi) |
945 | { |
946 | struct snd_card *card; |
947 | struct snd_at73c213 *chip; |
948 | struct at73c213_board_info *board; |
949 | int retval; |
950 | char id[16]; |
951 | |
952 | board = spi->dev.platform_data; |
953 | if (!board) { |
954 | dev_dbg(&spi->dev, "no platform_data\n"); |
955 | return -ENXIO; |
956 | } |
957 | |
958 | if (!board->dac_clk) { |
959 | dev_dbg(&spi->dev, "no DAC clk\n"); |
960 | return -ENXIO; |
961 | } |
962 | |
963 | if (IS_ERR(board->dac_clk)) { |
964 | dev_dbg(&spi->dev, "no DAC clk\n"); |
965 | return PTR_ERR(board->dac_clk); |
966 | } |
967 | |
968 | /* Allocate "card" using some unused identifiers. */ |
969 | snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); |
970 | retval = snd_card_create(-1, id, THIS_MODULE, |
971 | sizeof(struct snd_at73c213), &card); |
972 | if (retval < 0) |
973 | goto out; |
974 | |
975 | chip = card->private_data; |
976 | chip->spi = spi; |
977 | chip->board = board; |
978 | |
979 | chip->ssc = ssc_request(board->ssc_id); |
980 | if (IS_ERR(chip->ssc)) { |
981 | dev_dbg(&spi->dev, "could not get ssc%d device\n", |
982 | board->ssc_id); |
983 | retval = PTR_ERR(chip->ssc); |
984 | goto out_card; |
985 | } |
986 | |
987 | retval = snd_at73c213_dev_init(card, spi); |
988 | if (retval) |
989 | goto out_ssc; |
990 | |
991 | strcpy(card->driver, "at73c213"); |
992 | strcpy(card->shortname, board->shortname); |
993 | sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq); |
994 | |
995 | retval = snd_card_register(card); |
996 | if (retval) |
997 | goto out_ssc; |
998 | |
999 | dev_set_drvdata(&spi->dev, card); |
1000 | |
1001 | goto out; |
1002 | |
1003 | out_ssc: |
1004 | ssc_free(chip->ssc); |
1005 | out_card: |
1006 | snd_card_free(card); |
1007 | out: |
1008 | return retval; |
1009 | } |
1010 | |
1011 | static int __devexit snd_at73c213_remove(struct spi_device *spi) |
1012 | { |
1013 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
1014 | struct snd_at73c213 *chip = card->private_data; |
1015 | int retval; |
1016 | |
1017 | /* Stop playback. */ |
1018 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
1019 | |
1020 | /* Mute sound. */ |
1021 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); |
1022 | if (retval) |
1023 | goto out; |
1024 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); |
1025 | if (retval) |
1026 | goto out; |
1027 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); |
1028 | if (retval) |
1029 | goto out; |
1030 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); |
1031 | if (retval) |
1032 | goto out; |
1033 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); |
1034 | if (retval) |
1035 | goto out; |
1036 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); |
1037 | if (retval) |
1038 | goto out; |
1039 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); |
1040 | if (retval) |
1041 | goto out; |
1042 | |
1043 | /* Turn off PA. */ |
1044 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
1045 | chip->reg_image[PA_CTRL] | 0x0f); |
1046 | if (retval) |
1047 | goto out; |
1048 | msleep(10); |
1049 | retval = snd_at73c213_write_reg(chip, PA_CTRL, |
1050 | (1 << PA_CTRL_APALP) | 0x0f); |
1051 | if (retval) |
1052 | goto out; |
1053 | |
1054 | /* Turn off external DAC. */ |
1055 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c); |
1056 | if (retval) |
1057 | goto out; |
1058 | msleep(2); |
1059 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00); |
1060 | if (retval) |
1061 | goto out; |
1062 | |
1063 | /* Turn off master power. */ |
1064 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00); |
1065 | if (retval) |
1066 | goto out; |
1067 | |
1068 | out: |
1069 | /* Stop DAC master clock. */ |
1070 | clk_disable(chip->board->dac_clk); |
1071 | |
1072 | ssc_free(chip->ssc); |
1073 | snd_card_free(card); |
1074 | dev_set_drvdata(&spi->dev, NULL); |
1075 | |
1076 | return 0; |
1077 | } |
1078 | |
1079 | #ifdef CONFIG_PM |
1080 | static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg) |
1081 | { |
1082 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
1083 | struct snd_at73c213 *chip = card->private_data; |
1084 | |
1085 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); |
1086 | clk_disable(chip->board->dac_clk); |
1087 | |
1088 | return 0; |
1089 | } |
1090 | |
1091 | static int snd_at73c213_resume(struct spi_device *spi) |
1092 | { |
1093 | struct snd_card *card = dev_get_drvdata(&spi->dev); |
1094 | struct snd_at73c213 *chip = card->private_data; |
1095 | |
1096 | clk_enable(chip->board->dac_clk); |
1097 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); |
1098 | |
1099 | return 0; |
1100 | } |
1101 | #else |
1102 | #define snd_at73c213_suspend NULL |
1103 | #define snd_at73c213_resume NULL |
1104 | #endif |
1105 | |
1106 | static struct spi_driver at73c213_driver = { |
1107 | .driver = { |
1108 | .name = "at73c213", |
1109 | }, |
1110 | .probe = snd_at73c213_probe, |
1111 | .suspend = snd_at73c213_suspend, |
1112 | .resume = snd_at73c213_resume, |
1113 | .remove = __devexit_p(snd_at73c213_remove), |
1114 | }; |
1115 | |
1116 | static int __init at73c213_init(void) |
1117 | { |
1118 | return spi_register_driver(&at73c213_driver); |
1119 | } |
1120 | module_init(at73c213_init); |
1121 | |
1122 | static void __exit at73c213_exit(void) |
1123 | { |
1124 | spi_unregister_driver(&at73c213_driver); |
1125 | } |
1126 | module_exit(at73c213_exit); |
1127 | |
1128 | MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); |
1129 | MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); |
1130 | MODULE_LICENSE("GPL"); |
1131 |
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9