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coresight: Make the coresight_device_fwnode_match declaration's fwnode parameter...
[linux-block.git] / sound / spi / at73c213.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
eafe5708
HCE		 2/*
3 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
4 *
5 * Copyright (C) 2006-2007 Atmel Norway
eafe5708
HCE		 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>
f488d9fc 18#include <linux/mutex.h>
eafe5708
HCE		 19#include <linux/platform_device.h>
20#include <linux/io.h>
21
eafe5708
HCE		 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 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;
eafe5708
HCE		 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];
f488d9fc 75 /* Protect SSC registers against concurrent access. */
eafe5708 76 spinlock_t lock;
f488d9fc
HCE		 77 /* Protect mixer registers against concurrent access. */
78 struct mutex mixer_lock;
eafe5708
HCE		 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. */
4a295ca4 117 .channels_min = 1,
eafe5708
HCE		 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);
c67582b1
AN		 132 unsigned long dac_rate_new, ssc_div;
133 int status;
eafe5708
HCE		 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
e2e95662 155 /* ssc_div must be even. */
eafe5708
HCE		 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);
f62438ac 174 if (status <= 0)
eafe5708
HCE		 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;
f5e09ef0 209 int err;
eafe5708 210
f5e09ef0
AN		 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;
eafe5708
HCE		 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
3568459a
MR		 221 clk_enable(chip->ssc->clk);
222
eafe5708
HCE		 223 return 0;
224}
225
226static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
227{
228 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
229 chip->substream = NULL;
3568459a 230 clk_disable(chip->ssc->clk);
eafe5708
HCE		 231 return 0;
232}
233
234static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
235 struct snd_pcm_hw_params *hw_params)
236{
4a295ca4
AN		 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
eafe5708
HCE		 245 return snd_pcm_lib_malloc_pages(substream,
246 params_buffer_bytes(hw_params));
247}
248
249static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
250{
251 return snd_pcm_lib_free_pages(substream);
252}
253
254static 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);
4a295ca4
AN		 266 ssc_writel(chip->ssc->regs, PDC_TCR,
267 runtime->period_size * runtime->channels);
eafe5708
HCE		 268 ssc_writel(chip->ssc->regs, PDC_TNPR,
269 (long)runtime->dma_addr + block_size);
4a295ca4
AN		 270 ssc_writel(chip->ssc->regs, PDC_TNCR,
271 runtime->period_size * runtime->channels);
eafe5708
HCE		 272
273 return 0;
274}
275
276static 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
304static snd_pcm_uframes_t
305snd_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
7a205f5d 322static const struct snd_pcm_ops at73c213_playback_ops = {
eafe5708
HCE		 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
4423d247 333static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
eafe5708
HCE		 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;
eafe5708
HCE		 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
600bacfc 350 snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
eafe5708
HCE		 351 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
352 64 * 1024, 64 * 1024);
353out:
354 return retval;
355}
356
357static 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);
4a295ca4
AN		 384 ssc_writel(chip->ssc->regs, PDC_TNCR,
385 runtime->period_size * runtime->channels);
eafe5708
HCE		 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 */
401static 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
f488d9fc 410 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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
f488d9fc 419 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 420
421 return 0;
422}
423
424static 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
f488d9fc 440 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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
f488d9fc 446 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 447
448 if (retval)
449 return retval;
450
451 return change;
452}
453
454static 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
471static 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
f488d9fc 482 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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
f488d9fc 496 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 497
498 return 0;
499}
500
501static 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
f488d9fc 523 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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) {
f488d9fc 531 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 532 goto out;
533 }
534 retval = snd_at73c213_write_reg(chip, right_reg, val2);
535 if (retval) {
f488d9fc 536 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 537 goto out;
538 }
539
f488d9fc 540 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 541
542 return change;
543
544out:
545 return retval;
546}
547
4b6c26af 548#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
eafe5708
HCE		 549
550static 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
f488d9fc 558 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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
f488d9fc 567 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 568
569 return 0;
570}
571
572static 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
f488d9fc 592 mutex_lock(&chip->mixer_lock);
eafe5708
HCE		 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
f488d9fc 599 mutex_unlock(&chip->mixer_lock);
eafe5708
HCE		 600
601 if (retval)
602 return retval;
603
604 return change;
605}
606
607static 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
618static 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
631static 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
4423d247 668static struct snd_kcontrol_new snd_at73c213_controls[] = {
eafe5708
HCE		 669AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
670AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
671AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
672AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
673AT73C213_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},
685AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
686 0x01, 1),
687AT73C213_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},
697AT73C213_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},
709AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
710};
711
4423d247 712static int snd_at73c213_mixer(struct snd_at73c213 *chip)
eafe5708
HCE		 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
734cleanup:
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 */
4423d247 747static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
eafe5708
HCE		 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
4423d247 777static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
eafe5708
HCE		 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
863out_clk:
864 clk_disable(chip->board->dac_clk);
865out:
866 return retval;
867}
868
869static 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
4423d247
BP		 882static int snd_at73c213_dev_init(struct snd_card *card,
883 struct spi_device *spi)
eafe5708
HCE		 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);
f488d9fc 896 mutex_init(&chip->mixer_lock);
eafe5708
HCE		 897 chip->card = card;
898 chip->irq = -1;
899
3568459a
MR		 900 clk_enable(chip->ssc->clk);
901
eafe5708
HCE		 902 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
903 if (retval) {
904 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
905 goto out;
906 }
907 chip->irq = irq;
908
909 memcpy(&chip->reg_image, &snd_at73c213_original_image,
910 sizeof(snd_at73c213_original_image));
911
912 retval = snd_at73c213_ssc_init(chip);
913 if (retval)
914 goto out_irq;
915
916 retval = snd_at73c213_chip_init(chip);
917 if (retval)
918 goto out_irq;
919
920 retval = snd_at73c213_pcm_new(chip, 0);
921 if (retval)
922 goto out_irq;
923
924 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
925 if (retval)
926 goto out_irq;
927
928 retval = snd_at73c213_mixer(chip);
929 if (retval)
930 goto out_snd_dev;
931
eafe5708
HCE		 932 goto out;
933
934out_snd_dev:
935 snd_device_free(card, chip);
936out_irq:
937 free_irq(chip->irq, chip);
938 chip->irq = -1;
939out:
3568459a
MR		 940 clk_disable(chip->ssc->clk);
941
eafe5708
HCE		 942 return retval;
943}
944
4423d247 945static int snd_at73c213_probe(struct spi_device *spi)
eafe5708
HCE		 946{
947 struct snd_card *card;
948 struct snd_at73c213 *chip;
949 struct at73c213_board_info *board;
950 int retval;
951 char id[16];
952
953 board = spi->dev.platform_data;
954 if (!board) {
955 dev_dbg(&spi->dev, "no platform_data\n");
956 return -ENXIO;
957 }
958
959 if (!board->dac_clk) {
960 dev_dbg(&spi->dev, "no DAC clk\n");
961 return -ENXIO;
962 }
963
964 if (IS_ERR(board->dac_clk)) {
965 dev_dbg(&spi->dev, "no DAC clk\n");
966 return PTR_ERR(board->dac_clk);
967 }
968
eafe5708
HCE		 969 /* Allocate "card" using some unused identifiers. */
970 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
6e10af77
TI		 971 retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
972 sizeof(struct snd_at73c213), &card);
bd7dd77c 973 if (retval < 0)
eafe5708
HCE		 974 goto out;
975
976 chip = card->private_data;
977 chip->spi = spi;
978 chip->board = board;
979
980 chip->ssc = ssc_request(board->ssc_id);
981 if (IS_ERR(chip->ssc)) {
982 dev_dbg(&spi->dev, "could not get ssc%d device\n",
983 board->ssc_id);
984 retval = PTR_ERR(chip->ssc);
985 goto out_card;
986 }
987
988 retval = snd_at73c213_dev_init(card, spi);
989 if (retval)
990 goto out_ssc;
991
992 strcpy(card->driver, "at73c213");
993 strcpy(card->shortname, board->shortname);
994 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
995
996 retval = snd_card_register(card);
997 if (retval)
998 goto out_ssc;
999
1000 dev_set_drvdata(&spi->dev, card);
1001
1002 goto out;
1003
1004out_ssc:
1005 ssc_free(chip->ssc);
1006out_card:
1007 snd_card_free(card);
1008out:
1009 return retval;
1010}
1011
4423d247 1012static int snd_at73c213_remove(struct spi_device *spi)
eafe5708
HCE		 1013{
1014 struct snd_card *card = dev_get_drvdata(&spi->dev);
1015 struct snd_at73c213 *chip = card->private_data;
1016 int retval;
1017
1018 /* Stop playback. */
3568459a 1019 clk_enable(chip->ssc->clk);
eafe5708 1020 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
3568459a 1021 clk_disable(chip->ssc->clk);
eafe5708
HCE		 1022
1023 /* Mute sound. */
1024 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1025 if (retval)
1026 goto out;
1027 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1028 if (retval)
1029 goto out;
1030 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1031 if (retval)
1032 goto out;
1033 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1034 if (retval)
1035 goto out;
1036 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1037 if (retval)
1038 goto out;
1039 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1040 if (retval)
1041 goto out;
1042 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1043 if (retval)
1044 goto out;
1045
1046 /* Turn off PA. */
1047 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1048 chip->reg_image[PA_CTRL] | 0x0f);
1049 if (retval)
1050 goto out;
1051 msleep(10);
1052 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1053 (1 << PA_CTRL_APALP) | 0x0f);
1054 if (retval)
1055 goto out;
1056
1057 /* Turn off external DAC. */
1058 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1059 if (retval)
1060 goto out;
1061 msleep(2);
1062 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1063 if (retval)
1064 goto out;
1065
1066 /* Turn off master power. */
1067 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1068 if (retval)
1069 goto out;
1070
1071out:
1072 /* Stop DAC master clock. */
1073 clk_disable(chip->board->dac_clk);
1074
1075 ssc_free(chip->ssc);
1076 snd_card_free(card);
eafe5708
HCE		 1077
1078 return 0;
1079}
1080
01f9326a
LPC		 1081#ifdef CONFIG_PM_SLEEP
1082
1083static int snd_at73c213_suspend(struct device *dev)
eafe5708 1084{
01f9326a 1085 struct snd_card *card = dev_get_drvdata(dev);
eafe5708
HCE		 1086 struct snd_at73c213 *chip = card->private_data;
1087
1088 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
3568459a 1089 clk_disable(chip->ssc->clk);
eafe5708
HCE		 1090 clk_disable(chip->board->dac_clk);
1091
1092 return 0;
1093}
1094
01f9326a 1095static int snd_at73c213_resume(struct device *dev)
eafe5708 1096{
01f9326a 1097 struct snd_card *card = dev_get_drvdata(dev);
eafe5708
HCE		 1098 struct snd_at73c213 *chip = card->private_data;
1099
1100 clk_enable(chip->board->dac_clk);
3568459a 1101 clk_enable(chip->ssc->clk);
eafe5708
HCE		 1102 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1103
1104 return 0;
1105}
01f9326a
LPC		 1106
1107static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
1108 snd_at73c213_resume);
1109#define AT73C213_PM_OPS (&at73c213_pm_ops)
1110
eafe5708 1111#else
01f9326a 1112#define AT73C213_PM_OPS NULL
eafe5708
HCE		 1113#endif
1114
1115static struct spi_driver at73c213_driver = {
1116 .driver = {
1117 .name = "at73c213",
01f9326a 1118 .pm = AT73C213_PM_OPS,
eafe5708
HCE		 1119 },
1120 .probe = snd_at73c213_probe,
4423d247 1121 .remove = snd_at73c213_remove,
eafe5708
HCE		 1122};
1123
f443ac93 1124module_spi_driver(at73c213_driver);
eafe5708 1125
0cfae7c9 1126MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
eafe5708
HCE		 1127MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1128MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)