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