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[ALSA] at73c213: monaural support
[linux-2.6/openmoko-kernel.git] / sound / spi / at73c213.c
blob1355fe0c6674e2a9831651d5720afdb102017274
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
214 snd_at73c213_playback_hw.rate_min = chip->bitrate;
215 snd_at73c213_playback_hw.rate_max = chip->bitrate;
216 runtime->hw = snd_at73c213_playback_hw;
217 chip->substream = substream;
218
219 return 0;
220 }
221
222 static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
223 {
224 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
225 chip->substream = NULL;
226 return 0;
227 }
228
229 static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
230 struct snd_pcm_hw_params *hw_params)
231 {
232 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
233 int channels = params_channels(hw_params);
234 int val;
235
236 val = ssc_readl(chip->ssc->regs, TFMR);
237 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
238 ssc_writel(chip->ssc->regs, TFMR, val);
239
240 return snd_pcm_lib_malloc_pages(substream,
241 params_buffer_bytes(hw_params));
242 }
243
244 static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
245 {
246 return snd_pcm_lib_free_pages(substream);
247 }
248
249 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
250 {
251 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
252 struct snd_pcm_runtime *runtime = substream->runtime;
253 int block_size;
254
255 block_size = frames_to_bytes(runtime, runtime->period_size);
256
257 chip->period = 0;
258
259 ssc_writel(chip->ssc->regs, PDC_TPR,
260 (long)runtime->dma_addr);
261 ssc_writel(chip->ssc->regs, PDC_TCR,
262 runtime->period_size * runtime->channels);
263 ssc_writel(chip->ssc->regs, PDC_TNPR,
264 (long)runtime->dma_addr + block_size);
265 ssc_writel(chip->ssc->regs, PDC_TNCR,
266 runtime->period_size * runtime->channels);
267
268 return 0;
269 }
270
271 static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
272 int cmd)
273 {
274 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
275 int retval = 0;
276
277 spin_lock(&chip->lock);
278
279 switch (cmd) {
280 case SNDRV_PCM_TRIGGER_START:
281 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
282 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
283 break;
284 case SNDRV_PCM_TRIGGER_STOP:
285 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
286 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
287 break;
288 default:
289 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
290 retval = -EINVAL;
291 break;
292 }
293
294 spin_unlock(&chip->lock);
295
296 return retval;
297 }
298
299 static snd_pcm_uframes_t
300 snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
301 {
302 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
303 struct snd_pcm_runtime *runtime = substream->runtime;
304 snd_pcm_uframes_t pos;
305 unsigned long bytes;
306
307 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
308 - (unsigned long)runtime->dma_addr;
309
310 pos = bytes_to_frames(runtime, bytes);
311 if (pos >= runtime->buffer_size)
312 pos -= runtime->buffer_size;
313
314 return pos;
315 }
316
317 static struct snd_pcm_ops at73c213_playback_ops = {
318 .open = snd_at73c213_pcm_open,
319 .close = snd_at73c213_pcm_close,
320 .ioctl = snd_pcm_lib_ioctl,
321 .hw_params = snd_at73c213_pcm_hw_params,
322 .hw_free = snd_at73c213_pcm_hw_free,
323 .prepare = snd_at73c213_pcm_prepare,
324 .trigger = snd_at73c213_pcm_trigger,
325 .pointer = snd_at73c213_pcm_pointer,
326 };
327
328 static void snd_at73c213_pcm_free(struct snd_pcm *pcm)
329 {
330 struct snd_at73c213 *chip = snd_pcm_chip(pcm);
331 if (chip->pcm) {
332 snd_pcm_lib_preallocate_free_for_all(chip->pcm);
333 chip->pcm = NULL;
334 }
335 }
336
337 static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
338 {
339 struct snd_pcm *pcm;
340 int retval;
341
342 retval = snd_pcm_new(chip->card, chip->card->shortname,
343 device, 1, 0, &pcm);
344 if (retval < 0)
345 goto out;
346
347 pcm->private_data = chip;
348 pcm->private_free = snd_at73c213_pcm_free;
349 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
350 strcpy(pcm->name, "at73c213");
351 chip->pcm = pcm;
352
353 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
354
355 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
356 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
357 64 * 1024, 64 * 1024);
358 out:
359 return retval;
360 }
361
362 static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
363 {
364 struct snd_at73c213 *chip = dev_id;
365 struct snd_pcm_runtime *runtime = chip->substream->runtime;
366 u32 status;
367 int offset;
368 int block_size;
369 int next_period;
370 int retval = IRQ_NONE;
371
372 spin_lock(&chip->lock);
373
374 block_size = frames_to_bytes(runtime, runtime->period_size);
375 status = ssc_readl(chip->ssc->regs, IMR);
376
377 if (status & SSC_BIT(IMR_ENDTX)) {
378 chip->period++;
379 if (chip->period == runtime->periods)
380 chip->period = 0;
381 next_period = chip->period + 1;
382 if (next_period == runtime->periods)
383 next_period = 0;
384
385 offset = block_size * next_period;
386
387 ssc_writel(chip->ssc->regs, PDC_TNPR,
388 (long)runtime->dma_addr + offset);
389 ssc_writel(chip->ssc->regs, PDC_TNCR,
390 runtime->period_size * runtime->channels);
391 retval = IRQ_HANDLED;
392 }
393
394 ssc_readl(chip->ssc->regs, IMR);
395 spin_unlock(&chip->lock);
396
397 if (status & SSC_BIT(IMR_ENDTX))
398 snd_pcm_period_elapsed(chip->substream);
399
400 return retval;
401 }
402
403 /*
404 * Mixer functions.
405 */
406 static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
407 struct snd_ctl_elem_value *ucontrol)
408 {
409 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
410 int reg = kcontrol->private_value & 0xff;
411 int shift = (kcontrol->private_value >> 8) & 0xff;
412 int mask = (kcontrol->private_value >> 16) & 0xff;
413 int invert = (kcontrol->private_value >> 24) & 0xff;
414
415 mutex_lock(&chip->mixer_lock);
416
417 ucontrol->value.integer.value[0] =
418 (chip->reg_image[reg] >> shift) & mask;
419
420 if (invert)
421 ucontrol->value.integer.value[0] =
422 mask - ucontrol->value.integer.value[0];
423
424 mutex_unlock(&chip->mixer_lock);
425
426 return 0;
427 }
428
429 static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
430 struct snd_ctl_elem_value *ucontrol)
431 {
432 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
433 int reg = kcontrol->private_value & 0xff;
434 int shift = (kcontrol->private_value >> 8) & 0xff;
435 int mask = (kcontrol->private_value >> 16) & 0xff;
436 int invert = (kcontrol->private_value >> 24) & 0xff;
437 int change, retval;
438 unsigned short val;
439
440 val = (ucontrol->value.integer.value[0] & mask);
441 if (invert)
442 val = mask - val;
443 val <<= shift;
444
445 mutex_lock(&chip->mixer_lock);
446
447 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
448 change = val != chip->reg_image[reg];
449 retval = snd_at73c213_write_reg(chip, reg, val);
450
451 mutex_unlock(&chip->mixer_lock);
452
453 if (retval)
454 return retval;
455
456 return change;
457 }
458
459 static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
460 struct snd_ctl_elem_info *uinfo)
461 {
462 int mask = (kcontrol->private_value >> 24) & 0xff;
463
464 if (mask == 1)
465 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
466 else
467 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
468
469 uinfo->count = 2;
470 uinfo->value.integer.min = 0;
471 uinfo->value.integer.max = mask;
472
473 return 0;
474 }
475
476 static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
477 struct snd_ctl_elem_value *ucontrol)
478 {
479 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
480 int left_reg = kcontrol->private_value & 0xff;
481 int right_reg = (kcontrol->private_value >> 8) & 0xff;
482 int shift_left = (kcontrol->private_value >> 16) & 0x07;
483 int shift_right = (kcontrol->private_value >> 19) & 0x07;
484 int mask = (kcontrol->private_value >> 24) & 0xff;
485 int invert = (kcontrol->private_value >> 22) & 1;
486
487 mutex_lock(&chip->mixer_lock);
488
489 ucontrol->value.integer.value[0] =
490 (chip->reg_image[left_reg] >> shift_left) & mask;
491 ucontrol->value.integer.value[1] =
492 (chip->reg_image[right_reg] >> shift_right) & mask;
493
494 if (invert) {
495 ucontrol->value.integer.value[0] =
496 mask - ucontrol->value.integer.value[0];
497 ucontrol->value.integer.value[1] =
498 mask - ucontrol->value.integer.value[1];
499 }
500
501 mutex_unlock(&chip->mixer_lock);
502
503 return 0;
504 }
505
506 static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
507 struct snd_ctl_elem_value *ucontrol)
508 {
509 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
510 int left_reg = kcontrol->private_value & 0xff;
511 int right_reg = (kcontrol->private_value >> 8) & 0xff;
512 int shift_left = (kcontrol->private_value >> 16) & 0x07;
513 int shift_right = (kcontrol->private_value >> 19) & 0x07;
514 int mask = (kcontrol->private_value >> 24) & 0xff;
515 int invert = (kcontrol->private_value >> 22) & 1;
516 int change, retval;
517 unsigned short val1, val2;
518
519 val1 = ucontrol->value.integer.value[0] & mask;
520 val2 = ucontrol->value.integer.value[1] & mask;
521 if (invert) {
522 val1 = mask - val1;
523 val2 = mask - val2;
524 }
525 val1 <<= shift_left;
526 val2 <<= shift_right;
527
528 mutex_lock(&chip->mixer_lock);
529
530 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
531 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
532 change = val1 != chip->reg_image[left_reg]
533 || val2 != chip->reg_image[right_reg];
534 retval = snd_at73c213_write_reg(chip, left_reg, val1);
535 if (retval) {
536 mutex_unlock(&chip->mixer_lock);
537 goto out;
538 }
539 retval = snd_at73c213_write_reg(chip, right_reg, val2);
540 if (retval) {
541 mutex_unlock(&chip->mixer_lock);
542 goto out;
543 }
544
545 mutex_unlock(&chip->mixer_lock);
546
547 return change;
548
549 out:
550 return retval;
551 }
552
553 #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
554
555 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
556 struct snd_ctl_elem_value *ucontrol)
557 {
558 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
559 int reg = kcontrol->private_value & 0xff;
560 int shift = (kcontrol->private_value >> 8) & 0xff;
561 int invert = (kcontrol->private_value >> 24) & 0xff;
562
563 mutex_lock(&chip->mixer_lock);
564
565 ucontrol->value.integer.value[0] =
566 (chip->reg_image[reg] >> shift) & 0x01;
567
568 if (invert)
569 ucontrol->value.integer.value[0] =
570 0x01 - ucontrol->value.integer.value[0];
571
572 mutex_unlock(&chip->mixer_lock);
573
574 return 0;
575 }
576
577 static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
578 struct snd_ctl_elem_value *ucontrol)
579 {
580 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
581 int reg = kcontrol->private_value & 0xff;
582 int shift = (kcontrol->private_value >> 8) & 0xff;
583 int mask = (kcontrol->private_value >> 16) & 0xff;
584 int invert = (kcontrol->private_value >> 24) & 0xff;
585 int change, retval;
586 unsigned short val;
587
588 if (ucontrol->value.integer.value[0])
589 val = mask;
590 else
591 val = 0;
592
593 if (invert)
594 val = mask - val;
595 val <<= shift;
596
597 mutex_lock(&chip->mixer_lock);
598
599 val |= (chip->reg_image[reg] & ~(mask << shift));
600 change = val != chip->reg_image[reg];
601
602 retval = snd_at73c213_write_reg(chip, reg, val);
603
604 mutex_unlock(&chip->mixer_lock);
605
606 if (retval)
607 return retval;
608
609 return change;
610 }
611
612 static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
613 struct snd_ctl_elem_info *uinfo)
614 {
615 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
616 uinfo->count = 1;
617 uinfo->value.integer.min = 0;
618 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
619
620 return 0;
621 }
622
623 static int snd_at73c213_line_capture_volume_info(
624 struct snd_kcontrol *kcontrol,
625 struct snd_ctl_elem_info *uinfo)
626 {
627 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
628 uinfo->count = 2;
629 /* When inverted will give values 0x10001 => 0. */
630 uinfo->value.integer.min = 14;
631 uinfo->value.integer.max = 31;
632
633 return 0;
634 }
635
636 static int snd_at73c213_aux_capture_volume_info(
637 struct snd_kcontrol *kcontrol,
638 struct snd_ctl_elem_info *uinfo)
639 {
640 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
641 uinfo->count = 1;
642 /* When inverted will give values 0x10001 => 0. */
643 uinfo->value.integer.min = 14;
644 uinfo->value.integer.max = 31;
645
646 return 0;
647 }
648
649 #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
650 { \
651 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
652 .name = xname, \
653 .index = xindex, \
654 .info = snd_at73c213_mono_switch_info, \
655 .get = snd_at73c213_mono_switch_get, \
656 .put = snd_at73c213_mono_switch_put, \
657 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
658 }
659
660 #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
661 { \
662 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
663 .name = xname, \
664 .index = xindex, \
665 .info = snd_at73c213_stereo_info, \
666 .get = snd_at73c213_stereo_get, \
667 .put = snd_at73c213_stereo_put, \
668 .private_value = (left_reg | (right_reg << 8) \
669 | (shift_left << 16) | (shift_right << 19) \
670 | (mask << 24) | (invert << 22)) \
671 }
672
673 static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = {
674 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
675 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
676 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
677 AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
678 AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
679 0x01, 0),
680 {
681 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
682 .name = "PA Playback Volume",
683 .index = 0,
684 .info = snd_at73c213_pa_volume_info,
685 .get = snd_at73c213_mono_get,
686 .put = snd_at73c213_mono_put,
687 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
688 (0x0f << 16) | (1 << 24),
689 },
690 AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
691 0x01, 1),
692 AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
693 {
694 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
695 .name = "Aux Capture Volume",
696 .index = 0,
697 .info = snd_at73c213_aux_capture_volume_info,
698 .get = snd_at73c213_mono_get,
699 .put = snd_at73c213_mono_put,
700 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
701 },
702 AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
703 0x01, 0),
704 {
705 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
706 .name = "Line Capture Volume",
707 .index = 0,
708 .info = snd_at73c213_line_capture_volume_info,
709 .get = snd_at73c213_stereo_get,
710 .put = snd_at73c213_stereo_put,
711 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
712 | (0x1f << 24) | (1 << 22),
713 },
714 AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
715 };
716
717 static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip)
718 {
719 struct snd_card *card;
720 int errval, idx;
721
722 if (chip == NULL || chip->pcm == NULL)
723 return -EINVAL;
724
725 card = chip->card;
726
727 strcpy(card->mixername, chip->pcm->name);
728
729 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
730 errval = snd_ctl_add(card,
731 snd_ctl_new1(&snd_at73c213_controls[idx],
732 chip));
733 if (errval < 0)
734 goto cleanup;
735 }
736
737 return 0;
738
739 cleanup:
740 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
741 struct snd_kcontrol *kctl;
742 kctl = snd_ctl_find_numid(card, idx);
743 if (kctl)
744 snd_ctl_remove(card, kctl);
745 }
746 return errval;
747 }
748
749 /*
750 * Device functions
751 */
752 static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip)
753 {
754 /*
755 * Continuous clock output.
756 * Starts on falling TF.
757 * Delay 1 cycle (1 bit).
758 * Periode is 16 bit (16 - 1).
759 */
760 ssc_writel(chip->ssc->regs, TCMR,
761 SSC_BF(TCMR_CKO, 1)
762 | SSC_BF(TCMR_START, 4)
763 | SSC_BF(TCMR_STTDLY, 1)
764 | SSC_BF(TCMR_PERIOD, 16 - 1));
765 /*
766 * Data length is 16 bit (16 - 1).
767 * Transmit MSB first.
768 * Transmit 2 words each transfer.
769 * Frame sync length is 16 bit (16 - 1).
770 * Frame starts on negative pulse.
771 */
772 ssc_writel(chip->ssc->regs, TFMR,
773 SSC_BF(TFMR_DATLEN, 16 - 1)
774 | SSC_BIT(TFMR_MSBF)
775 | SSC_BF(TFMR_DATNB, 1)
776 | SSC_BF(TFMR_FSLEN, 16 - 1)
777 | SSC_BF(TFMR_FSOS, 1));
778
779 return 0;
780 }
781
782 static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip)
783 {
784 int retval;
785 unsigned char dac_ctrl = 0;
786
787 retval = snd_at73c213_set_bitrate(chip);
788 if (retval)
789 goto out;
790
791 /* Enable DAC master clock. */
792 clk_enable(chip->board->dac_clk);
793
794 /* Initialize at73c213 on SPI bus. */
795 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
796 if (retval)
797 goto out_clk;
798 msleep(1);
799 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
800 if (retval)
801 goto out_clk;
802
803 /* Precharge everything. */
804 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
805 if (retval)
806 goto out_clk;
807 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
808 if (retval)
809 goto out_clk;
810 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
811 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
812 if (retval)
813 goto out_clk;
814
815 msleep(50);
816
817 /* Stop precharging PA. */
818 retval = snd_at73c213_write_reg(chip, PA_CTRL,
819 (1<<PA_CTRL_APALP) | 0x0f);
820 if (retval)
821 goto out_clk;
822
823 msleep(450);
824
825 /* Stop precharging DAC, turn on master power. */
826 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
827 if (retval)
828 goto out_clk;
829
830 msleep(1);
831
832 /* Turn on DAC. */
833 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
834 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
835
836 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
837 if (retval)
838 goto out_clk;
839
840 /* Mute sound. */
841 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
842 if (retval)
843 goto out_clk;
844 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
845 if (retval)
846 goto out_clk;
847 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
848 if (retval)
849 goto out_clk;
850 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
851 if (retval)
852 goto out_clk;
853 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
854 if (retval)
855 goto out_clk;
856 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
857 if (retval)
858 goto out_clk;
859 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
860 if (retval)
861 goto out_clk;
862
863 /* Enable I2S device, i.e. clock output. */
864 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
865
866 goto out;
867
868 out_clk:
869 clk_disable(chip->board->dac_clk);
870 out:
871 return retval;
872 }
873
874 static int snd_at73c213_dev_free(struct snd_device *device)
875 {
876 struct snd_at73c213 *chip = device->device_data;
877
878 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
879 if (chip->irq >= 0) {
880 free_irq(chip->irq, chip);
881 chip->irq = -1;
882 }
883
884 return 0;
885 }
886
887 static int __devinit snd_at73c213_dev_init(struct snd_card *card,
888 struct spi_device *spi)
889 {
890 static struct snd_device_ops ops = {
891 .dev_free = snd_at73c213_dev_free,
892 };
893 struct snd_at73c213 *chip = get_chip(card);
894 int irq, retval;
895
896 irq = chip->ssc->irq;
897 if (irq < 0)
898 return irq;
899
900 spin_lock_init(&chip->lock);
901 mutex_init(&chip->mixer_lock);
902 chip->card = card;
903 chip->irq = -1;
904
905 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
906 if (retval) {
907 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
908 goto out;
909 }
910 chip->irq = irq;
911
912 memcpy(&chip->reg_image, &snd_at73c213_original_image,
913 sizeof(snd_at73c213_original_image));
914
915 retval = snd_at73c213_ssc_init(chip);
916 if (retval)
917 goto out_irq;
918
919 retval = snd_at73c213_chip_init(chip);
920 if (retval)
921 goto out_irq;
922
923 retval = snd_at73c213_pcm_new(chip, 0);
924 if (retval)
925 goto out_irq;
926
927 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
928 if (retval)
929 goto out_irq;
930
931 retval = snd_at73c213_mixer(chip);
932 if (retval)
933 goto out_snd_dev;
934
935 snd_card_set_dev(card, &spi->dev);
936
937 goto out;
938
939 out_snd_dev:
940 snd_device_free(card, chip);
941 out_irq:
942 free_irq(chip->irq, chip);
943 chip->irq = -1;
944 out:
945 return retval;
946 }
947
948 static int __devinit snd_at73c213_probe(struct spi_device *spi)
949 {
950 struct snd_card *card;
951 struct snd_at73c213 *chip;
952 struct at73c213_board_info *board;
953 int retval;
954 char id[16];
955
956 board = spi->dev.platform_data;
957 if (!board) {
958 dev_dbg(&spi->dev, "no platform_data\n");
959 return -ENXIO;
960 }
961
962 if (!board->dac_clk) {
963 dev_dbg(&spi->dev, "no DAC clk\n");
964 return -ENXIO;
965 }
966
967 if (IS_ERR(board->dac_clk)) {
968 dev_dbg(&spi->dev, "no DAC clk\n");
969 return PTR_ERR(board->dac_clk);
970 }
971
972 retval = -ENOMEM;
973
974 /* Allocate "card" using some unused identifiers. */
975 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
976 card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213));
977 if (!card)
978 goto out;
979
980 chip = card->private_data;
981 chip->spi = spi;
982 chip->board = board;
983
984 chip->ssc = ssc_request(board->ssc_id);
985 if (IS_ERR(chip->ssc)) {
986 dev_dbg(&spi->dev, "could not get ssc%d device\n",
987 board->ssc_id);
988 retval = PTR_ERR(chip->ssc);
989 goto out_card;
990 }
991
992 retval = snd_at73c213_dev_init(card, spi);
993 if (retval)
994 goto out_ssc;
995
996 strcpy(card->driver, "at73c213");
997 strcpy(card->shortname, board->shortname);
998 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
999
1000 retval = snd_card_register(card);
1001 if (retval)
1002 goto out_ssc;
1003
1004 dev_set_drvdata(&spi->dev, card);
1005
1006 goto out;
1007
1008 out_ssc:
1009 ssc_free(chip->ssc);
1010 out_card:
1011 snd_card_free(card);
1012 out:
1013 return retval;
1014 }
1015
1016 static int __devexit snd_at73c213_remove(struct spi_device *spi)
1017 {
1018 struct snd_card *card = dev_get_drvdata(&spi->dev);
1019 struct snd_at73c213 *chip = card->private_data;
1020 int retval;
1021
1022 /* Stop playback. */
1023 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1024
1025 /* Mute sound. */
1026 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1027 if (retval)
1028 goto out;
1029 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1030 if (retval)
1031 goto out;
1032 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1033 if (retval)
1034 goto out;
1035 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1036 if (retval)
1037 goto out;
1038 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1039 if (retval)
1040 goto out;
1041 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1042 if (retval)
1043 goto out;
1044 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1045 if (retval)
1046 goto out;
1047
1048 /* Turn off PA. */
1049 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1050 chip->reg_image[PA_CTRL] | 0x0f);
1051 if (retval)
1052 goto out;
1053 msleep(10);
1054 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1055 (1 << PA_CTRL_APALP) | 0x0f);
1056 if (retval)
1057 goto out;
1058
1059 /* Turn off external DAC. */
1060 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1061 if (retval)
1062 goto out;
1063 msleep(2);
1064 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1065 if (retval)
1066 goto out;
1067
1068 /* Turn off master power. */
1069 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1070 if (retval)
1071 goto out;
1072
1073 out:
1074 /* Stop DAC master clock. */
1075 clk_disable(chip->board->dac_clk);
1076
1077 ssc_free(chip->ssc);
1078 snd_card_free(card);
1079 dev_set_drvdata(&spi->dev, NULL);
1080
1081 return 0;
1082 }
1083
1084 #ifdef CONFIG_PM
1085 static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg)
1086 {
1087 struct snd_card *card = dev_get_drvdata(&spi->dev);
1088 struct snd_at73c213 *chip = card->private_data;
1089
1090 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1091 clk_disable(chip->board->dac_clk);
1092
1093 return 0;
1094 }
1095
1096 static int snd_at73c213_resume(struct spi_device *spi)
1097 {
1098 struct snd_card *card = dev_get_drvdata(&spi->dev);
1099 struct snd_at73c213 *chip = card->private_data;
1100
1101 clk_enable(chip->board->dac_clk);
1102 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1103
1104 return 0;
1105 }
1106 #else
1107 #define snd_at73c213_suspend NULL
1108 #define snd_at73c213_resume NULL
1109 #endif
1110
1111 static struct spi_driver at73c213_driver = {
1112 .driver = {
1113 .name = "at73c213",
1114 },
1115 .probe = snd_at73c213_probe,
1116 .suspend = snd_at73c213_suspend,
1117 .resume = snd_at73c213_resume,
1118 .remove = __devexit_p(snd_at73c213_remove),
1119 };
1120
1121 static int __init at73c213_init(void)
1122 {
1123 return spi_register_driver(&at73c213_driver);
1124 }
1125 module_init(at73c213_init);
1126
1127 static void __exit at73c213_exit(void)
1128 {
1129 spi_unregister_driver(&at73c213_driver);
1130 }
1131 module_exit(at73c213_exit);
1132
1133 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
1134 MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1135 MODULE_LICENSE("GPL");
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