projects/linux·blob master · refs

1099 lines · 27.0 KiB

1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
4 *
5 * Copyright (C) 2006-2007 Atmel Norway
6 */
7
8/*#define DEBUG*/
9
10#include <linux/clk.h>
11#include <linux/err.h>
12#include <linux/delay.h>
13#include <linux/device.h>
14#include <linux/dma-mapping.h>
15#include <linux/init.h>
16#include <linux/interrupt.h>
17#include <linux/module.h>
18#include <linux/mutex.h>
19#include <linux/platform_device.h>
20#include <linux/io.h>
21
22#include <sound/initval.h>
23#include <sound/control.h>
24#include <sound/core.h>
25#include <sound/pcm.h>
26
27#include <linux/atmel-ssc.h>
28
29#include <linux/spi/spi.h>
30#include <linux/spi/at73c213.h>
31
32#include "at73c213.h"
33
34#define BITRATE_MIN 8000 /* Hardware limit? */
35#define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
36#define BITRATE_MAX 50000 /* Hardware limit. */
37
38/* Initial (hardware reset) AT73C213 register values. */
39static const u8 snd_at73c213_original_image[18] =
40{
41 0x00, /* 00 - CTRL */
42 0x05, /* 01 - LLIG */
43 0x05, /* 02 - RLIG */
44 0x08, /* 03 - LPMG */
45 0x08, /* 04 - RPMG */
46 0x00, /* 05 - LLOG */
47 0x00, /* 06 - RLOG */
48 0x22, /* 07 - OLC */
49 0x09, /* 08 - MC */
50 0x00, /* 09 - CSFC */
51 0x00, /* 0A - MISC */
52 0x00, /* 0B - */
53 0x00, /* 0C - PRECH */
54 0x05, /* 0D - AUXG */
55 0x00, /* 0E - */
56 0x00, /* 0F - */
57 0x00, /* 10 - RST */
58 0x00, /* 11 - PA_CTRL */
59};
60
61struct snd_at73c213 {
62 struct snd_card *card;
63 struct snd_pcm *pcm;
64 struct snd_pcm_substream *substream;
65 struct at73c213_board_info *board;
66 int irq;
67 int period;
68 unsigned long bitrate;
69 struct ssc_device *ssc;
70 struct spi_device *spi;
71 u8 spi_wbuffer[2];
72 u8 spi_rbuffer[2];
73 /* Image of the SPI registers in AT73C213. */
74 u8 reg_image[18];
75 /* Protect SSC registers against concurrent access. */
76 spinlock_t lock;
77 /* Protect mixer registers against concurrent access. */
78 struct mutex mixer_lock;
79};
80
81#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
82
83static int
84snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
85{
86 struct spi_message msg;
87 struct spi_transfer msg_xfer = {
88 .len = 2,
89 .cs_change = 0,
90 };
91 int retval;
92
93 spi_message_init(&msg);
94
95 chip->spi_wbuffer[0] = reg;
96 chip->spi_wbuffer[1] = val;
97
98 msg_xfer.tx_buf = chip->spi_wbuffer;
99 msg_xfer.rx_buf = chip->spi_rbuffer;
100 spi_message_add_tail(&msg_xfer, &msg);
101
102 retval = spi_sync(chip->spi, &msg);
103
104 if (!retval)
105 chip->reg_image[reg] = val;
106
107 return retval;
108}
109
110static struct snd_pcm_hardware snd_at73c213_playback_hw = {
111 .info = SNDRV_PCM_INFO_INTERLEAVED |
112 SNDRV_PCM_INFO_BLOCK_TRANSFER,
113 .formats = SNDRV_PCM_FMTBIT_S16_BE,
114 .rates = SNDRV_PCM_RATE_CONTINUOUS,
115 .rate_min = 8000, /* Replaced by chip->bitrate later. */
116 .rate_max = 50000, /* Replaced by chip->bitrate later. */
117 .channels_min = 1,
118 .channels_max = 2,
119 .buffer_bytes_max = 64 * 1024 - 1,
120 .period_bytes_min = 512,
121 .period_bytes_max = 64 * 1024 - 1,
122 .periods_min = 4,
123 .periods_max = 1024,
124};
125
126/*
127 * Calculate and set bitrate and divisions.
128 */
129static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
130{
131 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
132 unsigned long dac_rate_new, ssc_div;
133 int status;
134 unsigned long ssc_div_max, ssc_div_min;
135 int max_tries;
136
137 /*
138 * We connect two clocks here, picking divisors so the I2S clocks
139 * out data at the same rate the DAC clocks it in ... and as close
140 * as practical to the desired target rate.
141 *
142 * The DAC master clock (MCLK) is programmable, and is either 256
143 * or (not here) 384 times the I2S output clock (BCLK).
144 */
145
146 /* SSC clock / (bitrate * stereo * 16-bit). */
147 ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
148 ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
149 ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
150 max_tries = (ssc_div_max - ssc_div_min) / 2;
151
152 if (max_tries < 1)
153 max_tries = 1;
154
155 /* ssc_div must be even. */
156 ssc_div = (ssc_div + 1) & ~1UL;
157
158 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
159 ssc_div -= 2;
160 if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
161 return -ENXIO;
162 }
163
164 /* Search for a possible bitrate. */
165 do {
166 /* SSC clock / (ssc divider * 16-bit * stereo). */
167 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
168 return -ENXIO;
169
170 /* 256 / (2 * 16) = 8 */
171 dac_rate_new = 8 * (ssc_rate / ssc_div);
172
173 status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
174 if (status <= 0)
175 return status;
176
177 /* Ignore difference smaller than 256 Hz. */
178 if ((status/256) == (dac_rate_new/256))
179 goto set_rate;
180
181 ssc_div += 2;
182 } while (--max_tries);
183
184 /* Not able to find a valid bitrate. */
185 return -ENXIO;
186
187set_rate:
188 status = clk_set_rate(chip->board->dac_clk, status);
189 if (status < 0)
190 return status;
191
192 /* Set divider in SSC device. */
193 ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
194
195 /* SSC clock / (ssc divider * 16-bit * stereo). */
196 chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
197
198 dev_info(&chip->spi->dev,
199 "at73c213: supported bitrate is %lu (%lu divider)\n",
200 chip->bitrate, ssc_div);
201
202 return 0;
203}
204
205static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
206{
207 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
208 struct snd_pcm_runtime *runtime = substream->runtime;
209 int err;
210
211 /* ensure buffer_size is a multiple of period_size */
212 err = snd_pcm_hw_constraint_integer(runtime,
213 SNDRV_PCM_HW_PARAM_PERIODS);
214 if (err < 0)
215 return err;
216 snd_at73c213_playback_hw.rate_min = chip->bitrate;
217 snd_at73c213_playback_hw.rate_max = chip->bitrate;
218 runtime->hw = snd_at73c213_playback_hw;
219 chip->substream = substream;
220
221 err = clk_enable(chip->ssc->clk);
222 if (err)
223 return err;
224
225 return 0;
226}
227
228static 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 clk_disable(chip->ssc->clk);
233 return 0;
234}
235
236static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
237 struct snd_pcm_hw_params *hw_params)
238{
239 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
240 int channels = params_channels(hw_params);
241 int val;
242
243 val = ssc_readl(chip->ssc->regs, TFMR);
244 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
245 ssc_writel(chip->ssc->regs, TFMR, val);
246
247 return 0;
248}
249
250static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
251{
252 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
253 struct snd_pcm_runtime *runtime = substream->runtime;
254 int block_size;
255
256 block_size = frames_to_bytes(runtime, runtime->period_size);
257
258 chip->period = 0;
259
260 ssc_writel(chip->ssc->regs, PDC_TPR,
261 (long)runtime->dma_addr);
262 ssc_writel(chip->ssc->regs, PDC_TCR,
263 runtime->period_size * runtime->channels);
264 ssc_writel(chip->ssc->regs, PDC_TNPR,
265 (long)runtime->dma_addr + block_size);
266 ssc_writel(chip->ssc->regs, PDC_TNCR,
267 runtime->period_size * runtime->channels);
268
269 return 0;
270}
271
272static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
273 int cmd)
274{
275 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
276
277 guard(spinlock)(&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 return -EINVAL;
291 break;
292 }
293
294 return 0;
295}
296
297static snd_pcm_uframes_t
298snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
299{
300 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
301 struct snd_pcm_runtime *runtime = substream->runtime;
302 snd_pcm_uframes_t pos;
303 unsigned long bytes;
304
305 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
306 - (unsigned long)runtime->dma_addr;
307
308 pos = bytes_to_frames(runtime, bytes);
309 if (pos >= runtime->buffer_size)
310 pos -= runtime->buffer_size;
311
312 return pos;
313}
314
315static const struct snd_pcm_ops at73c213_playback_ops = {
316 .open = snd_at73c213_pcm_open,
317 .close = snd_at73c213_pcm_close,
318 .hw_params = snd_at73c213_pcm_hw_params,
319 .prepare = snd_at73c213_pcm_prepare,
320 .trigger = snd_at73c213_pcm_trigger,
321 .pointer = snd_at73c213_pcm_pointer,
322};
323
324static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
325{
326 struct snd_pcm *pcm;
327 int retval;
328
329 retval = snd_pcm_new(chip->card, chip->card->shortname,
330 device, 1, 0, &pcm);
331 if (retval < 0)
332 goto out;
333
334 pcm->private_data = chip;
335 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
336 strscpy(pcm->name, "at73c213");
337 chip->pcm = pcm;
338
339 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
340
341 snd_pcm_set_managed_buffer_all(chip->pcm,
342 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
343 64 * 1024, 64 * 1024);
344out:
345 return retval;
346}
347
348static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
349{
350 struct snd_at73c213 *chip = dev_id;
351 struct snd_pcm_runtime *runtime = chip->substream->runtime;
352 u32 status;
353 int offset;
354 int block_size;
355 int next_period;
356 int retval = IRQ_NONE;
357
358 scoped_guard(spinlock, &chip->lock) {
359 block_size = frames_to_bytes(runtime, runtime->period_size);
360 status = ssc_readl(chip->ssc->regs, IMR);
361
362 if (status & SSC_BIT(IMR_ENDTX)) {
363 chip->period++;
364 if (chip->period == runtime->periods)
365 chip->period = 0;
366 next_period = chip->period + 1;
367 if (next_period == runtime->periods)
368 next_period = 0;
369
370 offset = block_size * next_period;
371
372 ssc_writel(chip->ssc->regs, PDC_TNPR,
373 (long)runtime->dma_addr + offset);
374 ssc_writel(chip->ssc->regs, PDC_TNCR,
375 runtime->period_size * runtime->channels);
376 retval = IRQ_HANDLED;
377 }
378
379 ssc_readl(chip->ssc->regs, IMR);
380 }
381
382 if (status & SSC_BIT(IMR_ENDTX))
383 snd_pcm_period_elapsed(chip->substream);
384
385 return retval;
386}
387
388/*
389 * Mixer functions.
390 */
391static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
392 struct snd_ctl_elem_value *ucontrol)
393{
394 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
395 int reg = kcontrol->private_value & 0xff;
396 int shift = (kcontrol->private_value >> 8) & 0xff;
397 int mask = (kcontrol->private_value >> 16) & 0xff;
398 int invert = (kcontrol->private_value >> 24) & 0xff;
399
400 guard(mutex)(&chip->mixer_lock);
401
402 ucontrol->value.integer.value[0] =
403 (chip->reg_image[reg] >> shift) & mask;
404
405 if (invert)
406 ucontrol->value.integer.value[0] =
407 mask - ucontrol->value.integer.value[0];
408
409 return 0;
410}
411
412static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
413 struct snd_ctl_elem_value *ucontrol)
414{
415 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
416 int reg = kcontrol->private_value & 0xff;
417 int shift = (kcontrol->private_value >> 8) & 0xff;
418 int mask = (kcontrol->private_value >> 16) & 0xff;
419 int invert = (kcontrol->private_value >> 24) & 0xff;
420 int change, retval;
421 unsigned short val;
422
423 val = (ucontrol->value.integer.value[0] & mask);
424 if (invert)
425 val = mask - val;
426 val <<= shift;
427
428 guard(mutex)(&chip->mixer_lock);
429
430 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
431 change = val != chip->reg_image[reg];
432 retval = snd_at73c213_write_reg(chip, reg, val);
433
434 if (retval)
435 return retval;
436
437 return change;
438}
439
440static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
441 struct snd_ctl_elem_info *uinfo)
442{
443 int mask = (kcontrol->private_value >> 24) & 0xff;
444
445 if (mask == 1)
446 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
447 else
448 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
449
450 uinfo->count = 2;
451 uinfo->value.integer.min = 0;
452 uinfo->value.integer.max = mask;
453
454 return 0;
455}
456
457static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
458 struct snd_ctl_elem_value *ucontrol)
459{
460 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
461 int left_reg = kcontrol->private_value & 0xff;
462 int right_reg = (kcontrol->private_value >> 8) & 0xff;
463 int shift_left = (kcontrol->private_value >> 16) & 0x07;
464 int shift_right = (kcontrol->private_value >> 19) & 0x07;
465 int mask = (kcontrol->private_value >> 24) & 0xff;
466 int invert = (kcontrol->private_value >> 22) & 1;
467
468 guard(mutex)(&chip->mixer_lock);
469
470 ucontrol->value.integer.value[0] =
471 (chip->reg_image[left_reg] >> shift_left) & mask;
472 ucontrol->value.integer.value[1] =
473 (chip->reg_image[right_reg] >> shift_right) & mask;
474
475 if (invert) {
476 ucontrol->value.integer.value[0] =
477 mask - ucontrol->value.integer.value[0];
478 ucontrol->value.integer.value[1] =
479 mask - ucontrol->value.integer.value[1];
480 }
481
482 return 0;
483}
484
485static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
486 struct snd_ctl_elem_value *ucontrol)
487{
488 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
489 int left_reg = kcontrol->private_value & 0xff;
490 int right_reg = (kcontrol->private_value >> 8) & 0xff;
491 int shift_left = (kcontrol->private_value >> 16) & 0x07;
492 int shift_right = (kcontrol->private_value >> 19) & 0x07;
493 int mask = (kcontrol->private_value >> 24) & 0xff;
494 int invert = (kcontrol->private_value >> 22) & 1;
495 int change, retval;
496 unsigned short val1, val2;
497
498 val1 = ucontrol->value.integer.value[0] & mask;
499 val2 = ucontrol->value.integer.value[1] & mask;
500 if (invert) {
501 val1 = mask - val1;
502 val2 = mask - val2;
503 }
504 val1 <<= shift_left;
505 val2 <<= shift_right;
506
507 guard(mutex)(&chip->mixer_lock);
508
509 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
510 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
511 change = val1 != chip->reg_image[left_reg]
512 || val2 != chip->reg_image[right_reg];
513 retval = snd_at73c213_write_reg(chip, left_reg, val1);
514 if (retval)
515 return retval;
516 retval = snd_at73c213_write_reg(chip, right_reg, val2);
517 if (retval)
518 return retval;
519
520 return change;
521}
522
523#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
524
525static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
526 struct snd_ctl_elem_value *ucontrol)
527{
528 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
529 int reg = kcontrol->private_value & 0xff;
530 int shift = (kcontrol->private_value >> 8) & 0xff;
531 int invert = (kcontrol->private_value >> 24) & 0xff;
532
533 guard(mutex)(&chip->mixer_lock);
534
535 ucontrol->value.integer.value[0] =
536 (chip->reg_image[reg] >> shift) & 0x01;
537
538 if (invert)
539 ucontrol->value.integer.value[0] =
540 0x01 - ucontrol->value.integer.value[0];
541
542 return 0;
543}
544
545static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
546 struct snd_ctl_elem_value *ucontrol)
547{
548 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
549 int reg = kcontrol->private_value & 0xff;
550 int shift = (kcontrol->private_value >> 8) & 0xff;
551 int mask = (kcontrol->private_value >> 16) & 0xff;
552 int invert = (kcontrol->private_value >> 24) & 0xff;
553 int change, retval;
554 unsigned short val;
555
556 if (ucontrol->value.integer.value[0])
557 val = mask;
558 else
559 val = 0;
560
561 if (invert)
562 val = mask - val;
563 val <<= shift;
564
565 guard(mutex)(&chip->mixer_lock);
566
567 val |= (chip->reg_image[reg] & ~(mask << shift));
568 change = val != chip->reg_image[reg];
569
570 retval = snd_at73c213_write_reg(chip, reg, val);
571
572 if (retval)
573 return retval;
574
575 return change;
576}
577
578static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
579 struct snd_ctl_elem_info *uinfo)
580{
581 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
582 uinfo->count = 1;
583 uinfo->value.integer.min = 0;
584 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
585
586 return 0;
587}
588
589static int snd_at73c213_line_capture_volume_info(
590 struct snd_kcontrol *kcontrol,
591 struct snd_ctl_elem_info *uinfo)
592{
593 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
594 uinfo->count = 2;
595 /* When inverted will give values 0x10001 => 0. */
596 uinfo->value.integer.min = 14;
597 uinfo->value.integer.max = 31;
598
599 return 0;
600}
601
602static int snd_at73c213_aux_capture_volume_info(
603 struct snd_kcontrol *kcontrol,
604 struct snd_ctl_elem_info *uinfo)
605{
606 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
607 uinfo->count = 1;
608 /* When inverted will give values 0x10001 => 0. */
609 uinfo->value.integer.min = 14;
610 uinfo->value.integer.max = 31;
611
612 return 0;
613}
614
615#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
616{ \
617 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
618 .name = xname, \
619 .index = xindex, \
620 .info = snd_at73c213_mono_switch_info, \
621 .get = snd_at73c213_mono_switch_get, \
622 .put = snd_at73c213_mono_switch_put, \
623 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
624}
625
626#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
627{ \
628 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
629 .name = xname, \
630 .index = xindex, \
631 .info = snd_at73c213_stereo_info, \
632 .get = snd_at73c213_stereo_get, \
633 .put = snd_at73c213_stereo_put, \
634 .private_value = (left_reg | (right_reg << 8) \
635 | (shift_left << 16) | (shift_right << 19) \
636 | (mask << 24) | (invert << 22)) \
637}
638
639static const struct snd_kcontrol_new snd_at73c213_controls[] = {
640AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
641AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
642AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
643AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
644AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
645 0x01, 0),
646{
647 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
648 .name = "PA Playback Volume",
649 .index = 0,
650 .info = snd_at73c213_pa_volume_info,
651 .get = snd_at73c213_mono_get,
652 .put = snd_at73c213_mono_put,
653 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
654 (0x0f << 16) | (1 << 24),
655},
656AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
657 0x01, 1),
658AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
659{
660 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
661 .name = "Aux Capture Volume",
662 .index = 0,
663 .info = snd_at73c213_aux_capture_volume_info,
664 .get = snd_at73c213_mono_get,
665 .put = snd_at73c213_mono_put,
666 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
667},
668AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
669 0x01, 0),
670{
671 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
672 .name = "Line Capture Volume",
673 .index = 0,
674 .info = snd_at73c213_line_capture_volume_info,
675 .get = snd_at73c213_stereo_get,
676 .put = snd_at73c213_stereo_put,
677 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
678 | (0x1f << 24) | (1 << 22),
679},
680AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
681};
682
683static int snd_at73c213_mixer(struct snd_at73c213 *chip)
684{
685 struct snd_card *card;
686 int errval, idx;
687
688 if (chip == NULL || chip->pcm == NULL)
689 return -EINVAL;
690
691 card = chip->card;
692
693 strscpy(card->mixername, chip->pcm->name);
694
695 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
696 errval = snd_ctl_add(card,
697 snd_ctl_new1(&snd_at73c213_controls[idx],
698 chip));
699 if (errval < 0)
700 goto cleanup;
701 }
702
703 return 0;
704
705cleanup:
706 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++)
707 snd_ctl_remove(card, snd_ctl_find_numid(card, idx));
708 return errval;
709}
710
711/*
712 * Device functions
713 */
714static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
715{
716 /*
717 * Continuous clock output.
718 * Starts on falling TF.
719 * Delay 1 cycle (1 bit).
720 * Periode is 16 bit (16 - 1).
721 */
722 ssc_writel(chip->ssc->regs, TCMR,
723 SSC_BF(TCMR_CKO, 1)
724 | SSC_BF(TCMR_START, 4)
725 | SSC_BF(TCMR_STTDLY, 1)
726 | SSC_BF(TCMR_PERIOD, 16 - 1));
727 /*
728 * Data length is 16 bit (16 - 1).
729 * Transmit MSB first.
730 * Transmit 2 words each transfer.
731 * Frame sync length is 16 bit (16 - 1).
732 * Frame starts on negative pulse.
733 */
734 ssc_writel(chip->ssc->regs, TFMR,
735 SSC_BF(TFMR_DATLEN, 16 - 1)
736 | SSC_BIT(TFMR_MSBF)
737 | SSC_BF(TFMR_DATNB, 1)
738 | SSC_BF(TFMR_FSLEN, 16 - 1)
739 | SSC_BF(TFMR_FSOS, 1));
740
741 return 0;
742}
743
744static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
745{
746 int retval;
747 unsigned char dac_ctrl = 0;
748
749 retval = snd_at73c213_set_bitrate(chip);
750 if (retval)
751 goto out;
752
753 /* Enable DAC master clock. */
754 retval = clk_enable(chip->board->dac_clk);
755 if (retval)
756 goto out;
757
758 /* Initialize at73c213 on SPI bus. */
759 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
760 if (retval)
761 goto out_clk;
762 msleep(1);
763 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
764 if (retval)
765 goto out_clk;
766
767 /* Precharge everything. */
768 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
769 if (retval)
770 goto out_clk;
771 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
772 if (retval)
773 goto out_clk;
774 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
775 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
776 if (retval)
777 goto out_clk;
778
779 msleep(50);
780
781 /* Stop precharging PA. */
782 retval = snd_at73c213_write_reg(chip, PA_CTRL,
783 (1<<PA_CTRL_APALP) | 0x0f);
784 if (retval)
785 goto out_clk;
786
787 msleep(450);
788
789 /* Stop precharging DAC, turn on master power. */
790 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
791 if (retval)
792 goto out_clk;
793
794 msleep(1);
795
796 /* Turn on DAC. */
797 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
798 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
799
800 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
801 if (retval)
802 goto out_clk;
803
804 /* Mute sound. */
805 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
806 if (retval)
807 goto out_clk;
808 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
809 if (retval)
810 goto out_clk;
811 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
812 if (retval)
813 goto out_clk;
814 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
815 if (retval)
816 goto out_clk;
817 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
818 if (retval)
819 goto out_clk;
820 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
821 if (retval)
822 goto out_clk;
823 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
824 if (retval)
825 goto out_clk;
826
827 /* Enable I2S device, i.e. clock output. */
828 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
829
830 goto out;
831
832out_clk:
833 clk_disable(chip->board->dac_clk);
834out:
835 return retval;
836}
837
838static int snd_at73c213_dev_free(struct snd_device *device)
839{
840 struct snd_at73c213 *chip = device->device_data;
841
842 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
843 if (chip->irq >= 0) {
844 free_irq(chip->irq, chip);
845 chip->irq = -1;
846 }
847
848 return 0;
849}
850
851static int snd_at73c213_dev_init(struct snd_card *card,
852 struct spi_device *spi)
853{
854 static const struct snd_device_ops ops = {
855 .dev_free = snd_at73c213_dev_free,
856 };
857 struct snd_at73c213 *chip = get_chip(card);
858 int irq, retval;
859
860 irq = chip->ssc->irq;
861 if (irq < 0)
862 return irq;
863
864 spin_lock_init(&chip->lock);
865 mutex_init(&chip->mixer_lock);
866 chip->card = card;
867 chip->irq = -1;
868
869 retval = clk_enable(chip->ssc->clk);
870 if (retval)
871 return retval;
872
873 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
874 if (retval) {
875 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
876 goto out;
877 }
878 chip->irq = irq;
879
880 memcpy(&chip->reg_image, &snd_at73c213_original_image,
881 sizeof(snd_at73c213_original_image));
882
883 retval = snd_at73c213_ssc_init(chip);
884 if (retval)
885 goto out_irq;
886
887 retval = snd_at73c213_chip_init(chip);
888 if (retval)
889 goto out_irq;
890
891 retval = snd_at73c213_pcm_new(chip, 0);
892 if (retval)
893 goto out_irq;
894
895 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
896 if (retval)
897 goto out_irq;
898
899 retval = snd_at73c213_mixer(chip);
900 if (retval)
901 goto out_snd_dev;
902
903 goto out;
904
905out_snd_dev:
906 snd_device_free(card, chip);
907out_irq:
908 free_irq(chip->irq, chip);
909 chip->irq = -1;
910out:
911 clk_disable(chip->ssc->clk);
912
913 return retval;
914}
915
916static int snd_at73c213_probe(struct spi_device *spi)
917{
918 struct snd_card *card;
919 struct snd_at73c213 *chip;
920 struct at73c213_board_info *board;
921 int retval;
922 char id[16];
923
924 board = spi->dev.platform_data;
925 if (!board) {
926 dev_dbg(&spi->dev, "no platform_data\n");
927 return -ENXIO;
928 }
929
930 if (!board->dac_clk) {
931 dev_dbg(&spi->dev, "no DAC clk\n");
932 return -ENXIO;
933 }
934
935 if (IS_ERR(board->dac_clk)) {
936 dev_dbg(&spi->dev, "no DAC clk\n");
937 return PTR_ERR(board->dac_clk);
938 }
939
940 /* Allocate "card" using some unused identifiers. */
941 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
942 retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
943 sizeof(struct snd_at73c213), &card);
944 if (retval < 0)
945 goto out;
946
947 chip = card->private_data;
948 chip->spi = spi;
949 chip->board = board;
950
951 chip->ssc = ssc_request(board->ssc_id);
952 if (IS_ERR(chip->ssc)) {
953 dev_dbg(&spi->dev, "could not get ssc%d device\n",
954 board->ssc_id);
955 retval = PTR_ERR(chip->ssc);
956 goto out_card;
957 }
958
959 retval = snd_at73c213_dev_init(card, spi);
960 if (retval)
961 goto out_ssc;
962
963 strscpy(card->driver, "at73c213");
964 strscpy(card->shortname, board->shortname);
965 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
966
967 retval = snd_card_register(card);
968 if (retval)
969 goto out_ssc;
970
971 dev_set_drvdata(&spi->dev, card);
972
973 goto out;
974
975out_ssc:
976 ssc_free(chip->ssc);
977out_card:
978 snd_card_free(card);
979out:
980 return retval;
981}
982
983static void snd_at73c213_remove(struct spi_device *spi)
984{
985 struct snd_card *card = dev_get_drvdata(&spi->dev);
986 struct snd_at73c213 *chip = card->private_data;
987 int retval;
988
989 /* Stop playback. */
990 retval = clk_enable(chip->ssc->clk);
991 if (retval)
992 goto out;
993 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
994 clk_disable(chip->ssc->clk);
995
996 /* Mute sound. */
997 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
998 if (retval)
999 goto out;
1000 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1001 if (retval)
1002 goto out;
1003 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1004 if (retval)
1005 goto out;
1006 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1007 if (retval)
1008 goto out;
1009 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1010 if (retval)
1011 goto out;
1012 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1013 if (retval)
1014 goto out;
1015 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1016 if (retval)
1017 goto out;
1018
1019 /* Turn off PA. */
1020 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1021 chip->reg_image[PA_CTRL] | 0x0f);
1022 if (retval)
1023 goto out;
1024 msleep(10);
1025 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1026 (1 << PA_CTRL_APALP) | 0x0f);
1027 if (retval)
1028 goto out;
1029
1030 /* Turn off external DAC. */
1031 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1032 if (retval)
1033 goto out;
1034 msleep(2);
1035 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1036 if (retval)
1037 goto out;
1038
1039 /* Turn off master power. */
1040 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1041 if (retval)
1042 goto out;
1043
1044out:
1045 /* Stop DAC master clock. */
1046 clk_disable(chip->board->dac_clk);
1047
1048 ssc_free(chip->ssc);
1049 snd_card_free(card);
1050}
1051
1052static int snd_at73c213_suspend(struct device *dev)
1053{
1054 struct snd_card *card = dev_get_drvdata(dev);
1055 struct snd_at73c213 *chip = card->private_data;
1056
1057 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1058 clk_disable(chip->ssc->clk);
1059 clk_disable(chip->board->dac_clk);
1060
1061 return 0;
1062}
1063
1064static int snd_at73c213_resume(struct device *dev)
1065{
1066 struct snd_card *card = dev_get_drvdata(dev);
1067 struct snd_at73c213 *chip = card->private_data;
1068 int retval;
1069
1070 retval = clk_enable(chip->board->dac_clk);
1071 if (retval)
1072 return retval;
1073 retval = clk_enable(chip->ssc->clk);
1074 if (retval) {
1075 clk_disable(chip->board->dac_clk);
1076 return retval;
1077 }
1078 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1079
1080 return 0;
1081}
1082
1083static DEFINE_SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
1084 snd_at73c213_resume);
1085
1086static struct spi_driver at73c213_driver = {
1087 .driver = {
1088 .name = "at73c213",
1089 .pm = &at73c213_pm_ops,
1090 },
1091 .probe = snd_at73c213_probe,
1092 .remove = snd_at73c213_remove,
1093};
1094
1095module_spi_driver(at73c213_driver);
1096
1097MODULE_AUTHOR("Hans-Christian Egtvedt <[email protected]>");
1098MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1099MODULE_LICENSE("GPL");