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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 clk_enable(chip->ssc->clk);
222
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;
230 clk_disable(chip->ssc->clk);
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{
237 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
238 int channels = params_channels(hw_params);
239 int val;
240
241 val = ssc_readl(chip->ssc->regs, TFMR);
242 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
243 ssc_writel(chip->ssc->regs, TFMR, val);
244
245 return 0;
246}
247
248static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
249{
250 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
251 struct snd_pcm_runtime *runtime = substream->runtime;
252 int block_size;
253
254 block_size = frames_to_bytes(runtime, runtime->period_size);
255
256 chip->period = 0;
257
258 ssc_writel(chip->ssc->regs, PDC_TPR,
259 (long)runtime->dma_addr);
260 ssc_writel(chip->ssc->regs, PDC_TCR,
261 runtime->period_size * runtime->channels);
262 ssc_writel(chip->ssc->regs, PDC_TNPR,
263 (long)runtime->dma_addr + block_size);
264 ssc_writel(chip->ssc->regs, PDC_TNCR,
265 runtime->period_size * runtime->channels);
266
267 return 0;
268}
269
270static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
271 int cmd)
272{
273 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
274 int retval = 0;
275
276 spin_lock(&chip->lock);
277
278 switch (cmd) {
279 case SNDRV_PCM_TRIGGER_START:
280 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
281 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
282 break;
283 case SNDRV_PCM_TRIGGER_STOP:
284 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
285 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
286 break;
287 default:
288 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
289 retval = -EINVAL;
290 break;
291 }
292
293 spin_unlock(&chip->lock);
294
295 return retval;
296}
297
298static snd_pcm_uframes_t
299snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
300{
301 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
302 struct snd_pcm_runtime *runtime = substream->runtime;
303 snd_pcm_uframes_t pos;
304 unsigned long bytes;
305
306 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
307 - (unsigned long)runtime->dma_addr;
308
309 pos = bytes_to_frames(runtime, bytes);
310 if (pos >= runtime->buffer_size)
311 pos -= runtime->buffer_size;
312
313 return pos;
314}
315
316static const struct snd_pcm_ops at73c213_playback_ops = {
317 .open = snd_at73c213_pcm_open,
318 .close = snd_at73c213_pcm_close,
319 .hw_params = snd_at73c213_pcm_hw_params,
320 .prepare = snd_at73c213_pcm_prepare,
321 .trigger = snd_at73c213_pcm_trigger,
322 .pointer = snd_at73c213_pcm_pointer,
323};
324
325static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
326{
327 struct snd_pcm *pcm;
328 int retval;
329
330 retval = snd_pcm_new(chip->card, chip->card->shortname,
331 device, 1, 0, &pcm);
332 if (retval < 0)
333 goto out;
334
335 pcm->private_data = chip;
336 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
337 strcpy(pcm->name, "at73c213");
338 chip->pcm = pcm;
339
340 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
341
342 snd_pcm_set_managed_buffer_all(chip->pcm,
343 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
344 64 * 1024, 64 * 1024);
345out:
346 return retval;
347}
348
349static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
350{
351 struct snd_at73c213 *chip = dev_id;
352 struct snd_pcm_runtime *runtime = chip->substream->runtime;
353 u32 status;
354 int offset;
355 int block_size;
356 int next_period;
357 int retval = IRQ_NONE;
358
359 spin_lock(&chip->lock);
360
361 block_size = frames_to_bytes(runtime, runtime->period_size);
362 status = ssc_readl(chip->ssc->regs, IMR);
363
364 if (status & SSC_BIT(IMR_ENDTX)) {
365 chip->period++;
366 if (chip->period == runtime->periods)
367 chip->period = 0;
368 next_period = chip->period + 1;
369 if (next_period == runtime->periods)
370 next_period = 0;
371
372 offset = block_size * next_period;
373
374 ssc_writel(chip->ssc->regs, PDC_TNPR,
375 (long)runtime->dma_addr + offset);
376 ssc_writel(chip->ssc->regs, PDC_TNCR,
377 runtime->period_size * runtime->channels);
378 retval = IRQ_HANDLED;
379 }
380
381 ssc_readl(chip->ssc->regs, IMR);
382 spin_unlock(&chip->lock);
383
384 if (status & SSC_BIT(IMR_ENDTX))
385 snd_pcm_period_elapsed(chip->substream);
386
387 return retval;
388}
389
390/*
391 * Mixer functions.
392 */
393static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
394 struct snd_ctl_elem_value *ucontrol)
395{
396 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
397 int reg = kcontrol->private_value & 0xff;
398 int shift = (kcontrol->private_value >> 8) & 0xff;
399 int mask = (kcontrol->private_value >> 16) & 0xff;
400 int invert = (kcontrol->private_value >> 24) & 0xff;
401
402 mutex_lock(&chip->mixer_lock);
403
404 ucontrol->value.integer.value[0] =
405 (chip->reg_image[reg] >> shift) & mask;
406
407 if (invert)
408 ucontrol->value.integer.value[0] =
409 mask - ucontrol->value.integer.value[0];
410
411 mutex_unlock(&chip->mixer_lock);
412
413 return 0;
414}
415
416static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
417 struct snd_ctl_elem_value *ucontrol)
418{
419 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
420 int reg = kcontrol->private_value & 0xff;
421 int shift = (kcontrol->private_value >> 8) & 0xff;
422 int mask = (kcontrol->private_value >> 16) & 0xff;
423 int invert = (kcontrol->private_value >> 24) & 0xff;
424 int change, retval;
425 unsigned short val;
426
427 val = (ucontrol->value.integer.value[0] & mask);
428 if (invert)
429 val = mask - val;
430 val <<= shift;
431
432 mutex_lock(&chip->mixer_lock);
433
434 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
435 change = val != chip->reg_image[reg];
436 retval = snd_at73c213_write_reg(chip, reg, val);
437
438 mutex_unlock(&chip->mixer_lock);
439
440 if (retval)
441 return retval;
442
443 return change;
444}
445
446static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
447 struct snd_ctl_elem_info *uinfo)
448{
449 int mask = (kcontrol->private_value >> 24) & 0xff;
450
451 if (mask == 1)
452 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
453 else
454 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
455
456 uinfo->count = 2;
457 uinfo->value.integer.min = 0;
458 uinfo->value.integer.max = mask;
459
460 return 0;
461}
462
463static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
464 struct snd_ctl_elem_value *ucontrol)
465{
466 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
467 int left_reg = kcontrol->private_value & 0xff;
468 int right_reg = (kcontrol->private_value >> 8) & 0xff;
469 int shift_left = (kcontrol->private_value >> 16) & 0x07;
470 int shift_right = (kcontrol->private_value >> 19) & 0x07;
471 int mask = (kcontrol->private_value >> 24) & 0xff;
472 int invert = (kcontrol->private_value >> 22) & 1;
473
474 mutex_lock(&chip->mixer_lock);
475
476 ucontrol->value.integer.value[0] =
477 (chip->reg_image[left_reg] >> shift_left) & mask;
478 ucontrol->value.integer.value[1] =
479 (chip->reg_image[right_reg] >> shift_right) & mask;
480
481 if (invert) {
482 ucontrol->value.integer.value[0] =
483 mask - ucontrol->value.integer.value[0];
484 ucontrol->value.integer.value[1] =
485 mask - ucontrol->value.integer.value[1];
486 }
487
488 mutex_unlock(&chip->mixer_lock);
489
490 return 0;
491}
492
493static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
494 struct snd_ctl_elem_value *ucontrol)
495{
496 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
497 int left_reg = kcontrol->private_value & 0xff;
498 int right_reg = (kcontrol->private_value >> 8) & 0xff;
499 int shift_left = (kcontrol->private_value >> 16) & 0x07;
500 int shift_right = (kcontrol->private_value >> 19) & 0x07;
501 int mask = (kcontrol->private_value >> 24) & 0xff;
502 int invert = (kcontrol->private_value >> 22) & 1;
503 int change, retval;
504 unsigned short val1, val2;
505
506 val1 = ucontrol->value.integer.value[0] & mask;
507 val2 = ucontrol->value.integer.value[1] & mask;
508 if (invert) {
509 val1 = mask - val1;
510 val2 = mask - val2;
511 }
512 val1 <<= shift_left;
513 val2 <<= shift_right;
514
515 mutex_lock(&chip->mixer_lock);
516
517 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
518 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
519 change = val1 != chip->reg_image[left_reg]
520 || val2 != chip->reg_image[right_reg];
521 retval = snd_at73c213_write_reg(chip, left_reg, val1);
522 if (retval) {
523 mutex_unlock(&chip->mixer_lock);
524 goto out;
525 }
526 retval = snd_at73c213_write_reg(chip, right_reg, val2);
527 if (retval) {
528 mutex_unlock(&chip->mixer_lock);
529 goto out;
530 }
531
532 mutex_unlock(&chip->mixer_lock);
533
534 return change;
535
536out:
537 return retval;
538}
539
540#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
541
542static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
543 struct snd_ctl_elem_value *ucontrol)
544{
545 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
546 int reg = kcontrol->private_value & 0xff;
547 int shift = (kcontrol->private_value >> 8) & 0xff;
548 int invert = (kcontrol->private_value >> 24) & 0xff;
549
550 mutex_lock(&chip->mixer_lock);
551
552 ucontrol->value.integer.value[0] =
553 (chip->reg_image[reg] >> shift) & 0x01;
554
555 if (invert)
556 ucontrol->value.integer.value[0] =
557 0x01 - ucontrol->value.integer.value[0];
558
559 mutex_unlock(&chip->mixer_lock);
560
561 return 0;
562}
563
564static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
565 struct snd_ctl_elem_value *ucontrol)
566{
567 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
568 int reg = kcontrol->private_value & 0xff;
569 int shift = (kcontrol->private_value >> 8) & 0xff;
570 int mask = (kcontrol->private_value >> 16) & 0xff;
571 int invert = (kcontrol->private_value >> 24) & 0xff;
572 int change, retval;
573 unsigned short val;
574
575 if (ucontrol->value.integer.value[0])
576 val = mask;
577 else
578 val = 0;
579
580 if (invert)
581 val = mask - val;
582 val <<= shift;
583
584 mutex_lock(&chip->mixer_lock);
585
586 val |= (chip->reg_image[reg] & ~(mask << shift));
587 change = val != chip->reg_image[reg];
588
589 retval = snd_at73c213_write_reg(chip, reg, val);
590
591 mutex_unlock(&chip->mixer_lock);
592
593 if (retval)
594 return retval;
595
596 return change;
597}
598
599static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
600 struct snd_ctl_elem_info *uinfo)
601{
602 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
603 uinfo->count = 1;
604 uinfo->value.integer.min = 0;
605 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
606
607 return 0;
608}
609
610static int snd_at73c213_line_capture_volume_info(
611 struct snd_kcontrol *kcontrol,
612 struct snd_ctl_elem_info *uinfo)
613{
614 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
615 uinfo->count = 2;
616 /* When inverted will give values 0x10001 => 0. */
617 uinfo->value.integer.min = 14;
618 uinfo->value.integer.max = 31;
619
620 return 0;
621}
622
623static int snd_at73c213_aux_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 = 1;
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#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
637{ \
638 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
639 .name = xname, \
640 .index = xindex, \
641 .info = snd_at73c213_mono_switch_info, \
642 .get = snd_at73c213_mono_switch_get, \
643 .put = snd_at73c213_mono_switch_put, \
644 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
645}
646
647#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
648{ \
649 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
650 .name = xname, \
651 .index = xindex, \
652 .info = snd_at73c213_stereo_info, \
653 .get = snd_at73c213_stereo_get, \
654 .put = snd_at73c213_stereo_put, \
655 .private_value = (left_reg | (right_reg << 8) \
656 | (shift_left << 16) | (shift_right << 19) \
657 | (mask << 24) | (invert << 22)) \
658}
659
660static const struct snd_kcontrol_new snd_at73c213_controls[] = {
661AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
662AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
663AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
664AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
665AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
666 0x01, 0),
667{
668 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
669 .name = "PA Playback Volume",
670 .index = 0,
671 .info = snd_at73c213_pa_volume_info,
672 .get = snd_at73c213_mono_get,
673 .put = snd_at73c213_mono_put,
674 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
675 (0x0f << 16) | (1 << 24),
676},
677AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
678 0x01, 1),
679AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
680{
681 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
682 .name = "Aux Capture Volume",
683 .index = 0,
684 .info = snd_at73c213_aux_capture_volume_info,
685 .get = snd_at73c213_mono_get,
686 .put = snd_at73c213_mono_put,
687 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
688},
689AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
690 0x01, 0),
691{
692 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
693 .name = "Line Capture Volume",
694 .index = 0,
695 .info = snd_at73c213_line_capture_volume_info,
696 .get = snd_at73c213_stereo_get,
697 .put = snd_at73c213_stereo_put,
698 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
699 | (0x1f << 24) | (1 << 22),
700},
701AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
702};
703
704static int snd_at73c213_mixer(struct snd_at73c213 *chip)
705{
706 struct snd_card *card;
707 int errval, idx;
708
709 if (chip == NULL || chip->pcm == NULL)
710 return -EINVAL;
711
712 card = chip->card;
713
714 strcpy(card->mixername, chip->pcm->name);
715
716 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
717 errval = snd_ctl_add(card,
718 snd_ctl_new1(&snd_at73c213_controls[idx],
719 chip));
720 if (errval < 0)
721 goto cleanup;
722 }
723
724 return 0;
725
726cleanup:
727 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
728 struct snd_kcontrol *kctl;
729 kctl = snd_ctl_find_numid(card, idx);
730 if (kctl)
731 snd_ctl_remove(card, kctl);
732 }
733 return errval;
734}
735
736/*
737 * Device functions
738 */
739static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
740{
741 /*
742 * Continuous clock output.
743 * Starts on falling TF.
744 * Delay 1 cycle (1 bit).
745 * Periode is 16 bit (16 - 1).
746 */
747 ssc_writel(chip->ssc->regs, TCMR,
748 SSC_BF(TCMR_CKO, 1)
749 | SSC_BF(TCMR_START, 4)
750 | SSC_BF(TCMR_STTDLY, 1)
751 | SSC_BF(TCMR_PERIOD, 16 - 1));
752 /*
753 * Data length is 16 bit (16 - 1).
754 * Transmit MSB first.
755 * Transmit 2 words each transfer.
756 * Frame sync length is 16 bit (16 - 1).
757 * Frame starts on negative pulse.
758 */
759 ssc_writel(chip->ssc->regs, TFMR,
760 SSC_BF(TFMR_DATLEN, 16 - 1)
761 | SSC_BIT(TFMR_MSBF)
762 | SSC_BF(TFMR_DATNB, 1)
763 | SSC_BF(TFMR_FSLEN, 16 - 1)
764 | SSC_BF(TFMR_FSOS, 1));
765
766 return 0;
767}
768
769static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
770{
771 int retval;
772 unsigned char dac_ctrl = 0;
773
774 retval = snd_at73c213_set_bitrate(chip);
775 if (retval)
776 goto out;
777
778 /* Enable DAC master clock. */
779 clk_enable(chip->board->dac_clk);
780
781 /* Initialize at73c213 on SPI bus. */
782 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
783 if (retval)
784 goto out_clk;
785 msleep(1);
786 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
787 if (retval)
788 goto out_clk;
789
790 /* Precharge everything. */
791 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
792 if (retval)
793 goto out_clk;
794 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
795 if (retval)
796 goto out_clk;
797 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
798 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
799 if (retval)
800 goto out_clk;
801
802 msleep(50);
803
804 /* Stop precharging PA. */
805 retval = snd_at73c213_write_reg(chip, PA_CTRL,
806 (1<<PA_CTRL_APALP) | 0x0f);
807 if (retval)
808 goto out_clk;
809
810 msleep(450);
811
812 /* Stop precharging DAC, turn on master power. */
813 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
814 if (retval)
815 goto out_clk;
816
817 msleep(1);
818
819 /* Turn on DAC. */
820 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
821 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
822
823 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
824 if (retval)
825 goto out_clk;
826
827 /* Mute sound. */
828 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
829 if (retval)
830 goto out_clk;
831 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
832 if (retval)
833 goto out_clk;
834 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
835 if (retval)
836 goto out_clk;
837 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
838 if (retval)
839 goto out_clk;
840 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
841 if (retval)
842 goto out_clk;
843 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
844 if (retval)
845 goto out_clk;
846 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
847 if (retval)
848 goto out_clk;
849
850 /* Enable I2S device, i.e. clock output. */
851 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
852
853 goto out;
854
855out_clk:
856 clk_disable(chip->board->dac_clk);
857out:
858 return retval;
859}
860
861static int snd_at73c213_dev_free(struct snd_device *device)
862{
863 struct snd_at73c213 *chip = device->device_data;
864
865 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
866 if (chip->irq >= 0) {
867 free_irq(chip->irq, chip);
868 chip->irq = -1;
869 }
870
871 return 0;
872}
873
874static int snd_at73c213_dev_init(struct snd_card *card,
875 struct spi_device *spi)
876{
877 static const struct snd_device_ops ops = {
878 .dev_free = snd_at73c213_dev_free,
879 };
880 struct snd_at73c213 *chip = get_chip(card);
881 int irq, retval;
882
883 irq = chip->ssc->irq;
884 if (irq < 0)
885 return irq;
886
887 spin_lock_init(&chip->lock);
888 mutex_init(&chip->mixer_lock);
889 chip->card = card;
890 chip->irq = -1;
891
892 clk_enable(chip->ssc->clk);
893
894 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
895 if (retval) {
896 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
897 goto out;
898 }
899 chip->irq = irq;
900
901 memcpy(&chip->reg_image, &snd_at73c213_original_image,
902 sizeof(snd_at73c213_original_image));
903
904 retval = snd_at73c213_ssc_init(chip);
905 if (retval)
906 goto out_irq;
907
908 retval = snd_at73c213_chip_init(chip);
909 if (retval)
910 goto out_irq;
911
912 retval = snd_at73c213_pcm_new(chip, 0);
913 if (retval)
914 goto out_irq;
915
916 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
917 if (retval)
918 goto out_irq;
919
920 retval = snd_at73c213_mixer(chip);
921 if (retval)
922 goto out_snd_dev;
923
924 goto out;
925
926out_snd_dev:
927 snd_device_free(card, chip);
928out_irq:
929 free_irq(chip->irq, chip);
930 chip->irq = -1;
931out:
932 clk_disable(chip->ssc->clk);
933
934 return retval;
935}
936
937static int snd_at73c213_probe(struct spi_device *spi)
938{
939 struct snd_card *card;
940 struct snd_at73c213 *chip;
941 struct at73c213_board_info *board;
942 int retval;
943 char id[16];
944
945 board = spi->dev.platform_data;
946 if (!board) {
947 dev_dbg(&spi->dev, "no platform_data\n");
948 return -ENXIO;
949 }
950
951 if (!board->dac_clk) {
952 dev_dbg(&spi->dev, "no DAC clk\n");
953 return -ENXIO;
954 }
955
956 if (IS_ERR(board->dac_clk)) {
957 dev_dbg(&spi->dev, "no DAC clk\n");
958 return PTR_ERR(board->dac_clk);
959 }
960
961 /* Allocate "card" using some unused identifiers. */
962 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
963 retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
964 sizeof(struct snd_at73c213), &card);
965 if (retval < 0)
966 goto out;
967
968 chip = card->private_data;
969 chip->spi = spi;
970 chip->board = board;
971
972 chip->ssc = ssc_request(board->ssc_id);
973 if (IS_ERR(chip->ssc)) {
974 dev_dbg(&spi->dev, "could not get ssc%d device\n",
975 board->ssc_id);
976 retval = PTR_ERR(chip->ssc);
977 goto out_card;
978 }
979
980 retval = snd_at73c213_dev_init(card, spi);
981 if (retval)
982 goto out_ssc;
983
984 strcpy(card->driver, "at73c213");
985 strcpy(card->shortname, board->shortname);
986 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
987
988 retval = snd_card_register(card);
989 if (retval)
990 goto out_ssc;
991
992 dev_set_drvdata(&spi->dev, card);
993
994 goto out;
995
996out_ssc:
997 ssc_free(chip->ssc);
998out_card:
999 snd_card_free(card);
1000out:
1001 return retval;
1002}
1003
1004static int snd_at73c213_remove(struct spi_device *spi)
1005{
1006 struct snd_card *card = dev_get_drvdata(&spi->dev);
1007 struct snd_at73c213 *chip = card->private_data;
1008 int retval;
1009
1010 /* Stop playback. */
1011 clk_enable(chip->ssc->clk);
1012 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1013 clk_disable(chip->ssc->clk);
1014
1015 /* Mute sound. */
1016 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1017 if (retval)
1018 goto out;
1019 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1020 if (retval)
1021 goto out;
1022 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1023 if (retval)
1024 goto out;
1025 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1026 if (retval)
1027 goto out;
1028 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1029 if (retval)
1030 goto out;
1031 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1032 if (retval)
1033 goto out;
1034 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1035 if (retval)
1036 goto out;
1037
1038 /* Turn off PA. */
1039 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1040 chip->reg_image[PA_CTRL] | 0x0f);
1041 if (retval)
1042 goto out;
1043 msleep(10);
1044 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1045 (1 << PA_CTRL_APALP) | 0x0f);
1046 if (retval)
1047 goto out;
1048
1049 /* Turn off external DAC. */
1050 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1051 if (retval)
1052 goto out;
1053 msleep(2);
1054 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1055 if (retval)
1056 goto out;
1057
1058 /* Turn off master power. */
1059 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1060 if (retval)
1061 goto out;
1062
1063out:
1064 /* Stop DAC master clock. */
1065 clk_disable(chip->board->dac_clk);
1066
1067 ssc_free(chip->ssc);
1068 snd_card_free(card);
1069
1070 return 0;
1071}
1072
1073#ifdef CONFIG_PM_SLEEP
1074
1075static int snd_at73c213_suspend(struct device *dev)
1076{
1077 struct snd_card *card = dev_get_drvdata(dev);
1078 struct snd_at73c213 *chip = card->private_data;
1079
1080 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1081 clk_disable(chip->ssc->clk);
1082 clk_disable(chip->board->dac_clk);
1083
1084 return 0;
1085}
1086
1087static int snd_at73c213_resume(struct device *dev)
1088{
1089 struct snd_card *card = dev_get_drvdata(dev);
1090 struct snd_at73c213 *chip = card->private_data;
1091
1092 clk_enable(chip->board->dac_clk);
1093 clk_enable(chip->ssc->clk);
1094 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1095
1096 return 0;
1097}
1098
1099static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
1100 snd_at73c213_resume);
1101#define AT73C213_PM_OPS (&at73c213_pm_ops)
1102
1103#else
1104#define AT73C213_PM_OPS NULL
1105#endif
1106
1107static struct spi_driver at73c213_driver = {
1108 .driver = {
1109 .name = "at73c213",
1110 .pm = AT73C213_PM_OPS,
1111 },
1112 .probe = snd_at73c213_probe,
1113 .remove = snd_at73c213_remove,
1114};
1115
1116module_spi_driver(at73c213_driver);
1117
1118MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
1119MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1120MODULE_LICENSE("GPL");
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. */
42static 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
64struct snd_at73c213 {
65 struct snd_card *card;
66 struct snd_pcm *pcm;
67 struct snd_pcm_substream *substream;
68 struct at73c213_board_info *board;
69 int irq;
70 int period;
71 unsigned long bitrate;
72 struct ssc_device *ssc;
73 struct spi_device *spi;
74 u8 spi_wbuffer[2];
75 u8 spi_rbuffer[2];
76 /* Image of the SPI registers in AT73C213. */
77 u8 reg_image[18];
78 /* Protect SSC registers against concurrent access. */
79 spinlock_t lock;
80 /* Protect mixer registers against concurrent access. */
81 struct mutex mixer_lock;
82};
83
84#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
85
86static int
87snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
88{
89 struct spi_message msg;
90 struct spi_transfer msg_xfer = {
91 .len = 2,
92 .cs_change = 0,
93 };
94 int retval;
95
96 spi_message_init(&msg);
97
98 chip->spi_wbuffer[0] = reg;
99 chip->spi_wbuffer[1] = val;
100
101 msg_xfer.tx_buf = chip->spi_wbuffer;
102 msg_xfer.rx_buf = chip->spi_rbuffer;
103 spi_message_add_tail(&msg_xfer, &msg);
104
105 retval = spi_sync(chip->spi, &msg);
106
107 if (!retval)
108 chip->reg_image[reg] = val;
109
110 return retval;
111}
112
113static struct snd_pcm_hardware snd_at73c213_playback_hw = {
114 .info = SNDRV_PCM_INFO_INTERLEAVED |
115 SNDRV_PCM_INFO_BLOCK_TRANSFER,
116 .formats = SNDRV_PCM_FMTBIT_S16_BE,
117 .rates = SNDRV_PCM_RATE_CONTINUOUS,
118 .rate_min = 8000, /* Replaced by chip->bitrate later. */
119 .rate_max = 50000, /* Replaced by chip->bitrate later. */
120 .channels_min = 1,
121 .channels_max = 2,
122 .buffer_bytes_max = 64 * 1024 - 1,
123 .period_bytes_min = 512,
124 .period_bytes_max = 64 * 1024 - 1,
125 .periods_min = 4,
126 .periods_max = 1024,
127};
128
129/*
130 * Calculate and set bitrate and divisions.
131 */
132static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
133{
134 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
135 unsigned long dac_rate_new, ssc_div;
136 int status;
137 unsigned long ssc_div_max, ssc_div_min;
138 int max_tries;
139
140 /*
141 * We connect two clocks here, picking divisors so the I2S clocks
142 * out data at the same rate the DAC clocks it in ... and as close
143 * as practical to the desired target rate.
144 *
145 * The DAC master clock (MCLK) is programmable, and is either 256
146 * or (not here) 384 times the I2S output clock (BCLK).
147 */
148
149 /* SSC clock / (bitrate * stereo * 16-bit). */
150 ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
151 ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
152 ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
153 max_tries = (ssc_div_max - ssc_div_min) / 2;
154
155 if (max_tries < 1)
156 max_tries = 1;
157
158 /* ssc_div must be even. */
159 ssc_div = (ssc_div + 1) & ~1UL;
160
161 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
162 ssc_div -= 2;
163 if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
164 return -ENXIO;
165 }
166
167 /* Search for a possible bitrate. */
168 do {
169 /* SSC clock / (ssc divider * 16-bit * stereo). */
170 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
171 return -ENXIO;
172
173 /* 256 / (2 * 16) = 8 */
174 dac_rate_new = 8 * (ssc_rate / ssc_div);
175
176 status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
177 if (status <= 0)
178 return status;
179
180 /* Ignore difference smaller than 256 Hz. */
181 if ((status/256) == (dac_rate_new/256))
182 goto set_rate;
183
184 ssc_div += 2;
185 } while (--max_tries);
186
187 /* Not able to find a valid bitrate. */
188 return -ENXIO;
189
190set_rate:
191 status = clk_set_rate(chip->board->dac_clk, status);
192 if (status < 0)
193 return status;
194
195 /* Set divider in SSC device. */
196 ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
197
198 /* SSC clock / (ssc divider * 16-bit * stereo). */
199 chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
200
201 dev_info(&chip->spi->dev,
202 "at73c213: supported bitrate is %lu (%lu divider)\n",
203 chip->bitrate, ssc_div);
204
205 return 0;
206}
207
208static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
209{
210 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
211 struct snd_pcm_runtime *runtime = substream->runtime;
212 int err;
213
214 /* ensure buffer_size is a multiple of period_size */
215 err = snd_pcm_hw_constraint_integer(runtime,
216 SNDRV_PCM_HW_PARAM_PERIODS);
217 if (err < 0)
218 return err;
219 snd_at73c213_playback_hw.rate_min = chip->bitrate;
220 snd_at73c213_playback_hw.rate_max = chip->bitrate;
221 runtime->hw = snd_at73c213_playback_hw;
222 chip->substream = substream;
223
224 return 0;
225}
226
227static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
228{
229 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
230 chip->substream = NULL;
231 return 0;
232}
233
234static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
235 struct snd_pcm_hw_params *hw_params)
236{
237 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
238 int channels = params_channels(hw_params);
239 int val;
240
241 val = ssc_readl(chip->ssc->regs, TFMR);
242 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
243 ssc_writel(chip->ssc->regs, TFMR, val);
244
245 return snd_pcm_lib_malloc_pages(substream,
246 params_buffer_bytes(hw_params));
247}
248
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);
266 ssc_writel(chip->ssc->regs, PDC_TCR,
267 runtime->period_size * runtime->channels);
268 ssc_writel(chip->ssc->regs, PDC_TNPR,
269 (long)runtime->dma_addr + block_size);
270 ssc_writel(chip->ssc->regs, PDC_TNCR,
271 runtime->period_size * runtime->channels);
272
273 return 0;
274}
275
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
322static struct snd_pcm_ops at73c213_playback_ops = {
323 .open = snd_at73c213_pcm_open,
324 .close = snd_at73c213_pcm_close,
325 .ioctl = snd_pcm_lib_ioctl,
326 .hw_params = snd_at73c213_pcm_hw_params,
327 .hw_free = snd_at73c213_pcm_hw_free,
328 .prepare = snd_at73c213_pcm_prepare,
329 .trigger = snd_at73c213_pcm_trigger,
330 .pointer = snd_at73c213_pcm_pointer,
331};
332
333static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
334{
335 struct snd_pcm *pcm;
336 int retval;
337
338 retval = snd_pcm_new(chip->card, chip->card->shortname,
339 device, 1, 0, &pcm);
340 if (retval < 0)
341 goto out;
342
343 pcm->private_data = chip;
344 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
345 strcpy(pcm->name, "at73c213");
346 chip->pcm = pcm;
347
348 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
349
350 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
351 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
352 64 * 1024, 64 * 1024);
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);
384 ssc_writel(chip->ssc->regs, PDC_TNCR,
385 runtime->period_size * runtime->channels);
386 retval = IRQ_HANDLED;
387 }
388
389 ssc_readl(chip->ssc->regs, IMR);
390 spin_unlock(&chip->lock);
391
392 if (status & SSC_BIT(IMR_ENDTX))
393 snd_pcm_period_elapsed(chip->substream);
394
395 return retval;
396}
397
398/*
399 * Mixer functions.
400 */
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
410 mutex_lock(&chip->mixer_lock);
411
412 ucontrol->value.integer.value[0] =
413 (chip->reg_image[reg] >> shift) & mask;
414
415 if (invert)
416 ucontrol->value.integer.value[0] =
417 mask - ucontrol->value.integer.value[0];
418
419 mutex_unlock(&chip->mixer_lock);
420
421 return 0;
422}
423
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
440 mutex_lock(&chip->mixer_lock);
441
442 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
443 change = val != chip->reg_image[reg];
444 retval = snd_at73c213_write_reg(chip, reg, val);
445
446 mutex_unlock(&chip->mixer_lock);
447
448 if (retval)
449 return retval;
450
451 return change;
452}
453
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
482 mutex_lock(&chip->mixer_lock);
483
484 ucontrol->value.integer.value[0] =
485 (chip->reg_image[left_reg] >> shift_left) & mask;
486 ucontrol->value.integer.value[1] =
487 (chip->reg_image[right_reg] >> shift_right) & mask;
488
489 if (invert) {
490 ucontrol->value.integer.value[0] =
491 mask - ucontrol->value.integer.value[0];
492 ucontrol->value.integer.value[1] =
493 mask - ucontrol->value.integer.value[1];
494 }
495
496 mutex_unlock(&chip->mixer_lock);
497
498 return 0;
499}
500
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
523 mutex_lock(&chip->mixer_lock);
524
525 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
526 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
527 change = val1 != chip->reg_image[left_reg]
528 || val2 != chip->reg_image[right_reg];
529 retval = snd_at73c213_write_reg(chip, left_reg, val1);
530 if (retval) {
531 mutex_unlock(&chip->mixer_lock);
532 goto out;
533 }
534 retval = snd_at73c213_write_reg(chip, right_reg, val2);
535 if (retval) {
536 mutex_unlock(&chip->mixer_lock);
537 goto out;
538 }
539
540 mutex_unlock(&chip->mixer_lock);
541
542 return change;
543
544out:
545 return retval;
546}
547
548#define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
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
558 mutex_lock(&chip->mixer_lock);
559
560 ucontrol->value.integer.value[0] =
561 (chip->reg_image[reg] >> shift) & 0x01;
562
563 if (invert)
564 ucontrol->value.integer.value[0] =
565 0x01 - ucontrol->value.integer.value[0];
566
567 mutex_unlock(&chip->mixer_lock);
568
569 return 0;
570}
571
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
592 mutex_lock(&chip->mixer_lock);
593
594 val |= (chip->reg_image[reg] & ~(mask << shift));
595 change = val != chip->reg_image[reg];
596
597 retval = snd_at73c213_write_reg(chip, reg, val);
598
599 mutex_unlock(&chip->mixer_lock);
600
601 if (retval)
602 return retval;
603
604 return change;
605}
606
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
668static struct snd_kcontrol_new snd_at73c213_controls[] = {
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
712static int snd_at73c213_mixer(struct snd_at73c213 *chip)
713{
714 struct snd_card *card;
715 int errval, idx;
716
717 if (chip == NULL || chip->pcm == NULL)
718 return -EINVAL;
719
720 card = chip->card;
721
722 strcpy(card->mixername, chip->pcm->name);
723
724 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
725 errval = snd_ctl_add(card,
726 snd_ctl_new1(&snd_at73c213_controls[idx],
727 chip));
728 if (errval < 0)
729 goto cleanup;
730 }
731
732 return 0;
733
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 */
747static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
748{
749 /*
750 * Continuous clock output.
751 * Starts on falling TF.
752 * Delay 1 cycle (1 bit).
753 * Periode is 16 bit (16 - 1).
754 */
755 ssc_writel(chip->ssc->regs, TCMR,
756 SSC_BF(TCMR_CKO, 1)
757 | SSC_BF(TCMR_START, 4)
758 | SSC_BF(TCMR_STTDLY, 1)
759 | SSC_BF(TCMR_PERIOD, 16 - 1));
760 /*
761 * Data length is 16 bit (16 - 1).
762 * Transmit MSB first.
763 * Transmit 2 words each transfer.
764 * Frame sync length is 16 bit (16 - 1).
765 * Frame starts on negative pulse.
766 */
767 ssc_writel(chip->ssc->regs, TFMR,
768 SSC_BF(TFMR_DATLEN, 16 - 1)
769 | SSC_BIT(TFMR_MSBF)
770 | SSC_BF(TFMR_DATNB, 1)
771 | SSC_BF(TFMR_FSLEN, 16 - 1)
772 | SSC_BF(TFMR_FSOS, 1));
773
774 return 0;
775}
776
777static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
778{
779 int retval;
780 unsigned char dac_ctrl = 0;
781
782 retval = snd_at73c213_set_bitrate(chip);
783 if (retval)
784 goto out;
785
786 /* Enable DAC master clock. */
787 clk_enable(chip->board->dac_clk);
788
789 /* Initialize at73c213 on SPI bus. */
790 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
791 if (retval)
792 goto out_clk;
793 msleep(1);
794 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
795 if (retval)
796 goto out_clk;
797
798 /* Precharge everything. */
799 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
800 if (retval)
801 goto out_clk;
802 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
803 if (retval)
804 goto out_clk;
805 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
806 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
807 if (retval)
808 goto out_clk;
809
810 msleep(50);
811
812 /* Stop precharging PA. */
813 retval = snd_at73c213_write_reg(chip, PA_CTRL,
814 (1<<PA_CTRL_APALP) | 0x0f);
815 if (retval)
816 goto out_clk;
817
818 msleep(450);
819
820 /* Stop precharging DAC, turn on master power. */
821 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
822 if (retval)
823 goto out_clk;
824
825 msleep(1);
826
827 /* Turn on DAC. */
828 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
829 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
830
831 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
832 if (retval)
833 goto out_clk;
834
835 /* Mute sound. */
836 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
837 if (retval)
838 goto out_clk;
839 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
840 if (retval)
841 goto out_clk;
842 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
843 if (retval)
844 goto out_clk;
845 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
846 if (retval)
847 goto out_clk;
848 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
849 if (retval)
850 goto out_clk;
851 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
852 if (retval)
853 goto out_clk;
854 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
855 if (retval)
856 goto out_clk;
857
858 /* Enable I2S device, i.e. clock output. */
859 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
860
861 goto out;
862
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
882static int snd_at73c213_dev_init(struct snd_card *card,
883 struct spi_device *spi)
884{
885 static struct snd_device_ops ops = {
886 .dev_free = snd_at73c213_dev_free,
887 };
888 struct snd_at73c213 *chip = get_chip(card);
889 int irq, retval;
890
891 irq = chip->ssc->irq;
892 if (irq < 0)
893 return irq;
894
895 spin_lock_init(&chip->lock);
896 mutex_init(&chip->mixer_lock);
897 chip->card = card;
898 chip->irq = -1;
899
900 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
901 if (retval) {
902 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
903 goto out;
904 }
905 chip->irq = irq;
906
907 memcpy(&chip->reg_image, &snd_at73c213_original_image,
908 sizeof(snd_at73c213_original_image));
909
910 retval = snd_at73c213_ssc_init(chip);
911 if (retval)
912 goto out_irq;
913
914 retval = snd_at73c213_chip_init(chip);
915 if (retval)
916 goto out_irq;
917
918 retval = snd_at73c213_pcm_new(chip, 0);
919 if (retval)
920 goto out_irq;
921
922 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
923 if (retval)
924 goto out_irq;
925
926 retval = snd_at73c213_mixer(chip);
927 if (retval)
928 goto out_snd_dev;
929
930 goto out;
931
932out_snd_dev:
933 snd_device_free(card, chip);
934out_irq:
935 free_irq(chip->irq, chip);
936 chip->irq = -1;
937out:
938 return retval;
939}
940
941static int snd_at73c213_probe(struct spi_device *spi)
942{
943 struct snd_card *card;
944 struct snd_at73c213 *chip;
945 struct at73c213_board_info *board;
946 int retval;
947 char id[16];
948
949 board = spi->dev.platform_data;
950 if (!board) {
951 dev_dbg(&spi->dev, "no platform_data\n");
952 return -ENXIO;
953 }
954
955 if (!board->dac_clk) {
956 dev_dbg(&spi->dev, "no DAC clk\n");
957 return -ENXIO;
958 }
959
960 if (IS_ERR(board->dac_clk)) {
961 dev_dbg(&spi->dev, "no DAC clk\n");
962 return PTR_ERR(board->dac_clk);
963 }
964
965 /* Allocate "card" using some unused identifiers. */
966 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
967 retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
968 sizeof(struct snd_at73c213), &card);
969 if (retval < 0)
970 goto out;
971
972 chip = card->private_data;
973 chip->spi = spi;
974 chip->board = board;
975
976 chip->ssc = ssc_request(board->ssc_id);
977 if (IS_ERR(chip->ssc)) {
978 dev_dbg(&spi->dev, "could not get ssc%d device\n",
979 board->ssc_id);
980 retval = PTR_ERR(chip->ssc);
981 goto out_card;
982 }
983
984 retval = snd_at73c213_dev_init(card, spi);
985 if (retval)
986 goto out_ssc;
987
988 strcpy(card->driver, "at73c213");
989 strcpy(card->shortname, board->shortname);
990 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
991
992 retval = snd_card_register(card);
993 if (retval)
994 goto out_ssc;
995
996 dev_set_drvdata(&spi->dev, card);
997
998 goto out;
999
1000out_ssc:
1001 ssc_free(chip->ssc);
1002out_card:
1003 snd_card_free(card);
1004out:
1005 return retval;
1006}
1007
1008static int snd_at73c213_remove(struct spi_device *spi)
1009{
1010 struct snd_card *card = dev_get_drvdata(&spi->dev);
1011 struct snd_at73c213 *chip = card->private_data;
1012 int retval;
1013
1014 /* Stop playback. */
1015 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1016
1017 /* Mute sound. */
1018 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1019 if (retval)
1020 goto out;
1021 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1022 if (retval)
1023 goto out;
1024 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1025 if (retval)
1026 goto out;
1027 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1028 if (retval)
1029 goto out;
1030 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1031 if (retval)
1032 goto out;
1033 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1034 if (retval)
1035 goto out;
1036 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1037 if (retval)
1038 goto out;
1039
1040 /* Turn off PA. */
1041 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1042 chip->reg_image[PA_CTRL] | 0x0f);
1043 if (retval)
1044 goto out;
1045 msleep(10);
1046 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1047 (1 << PA_CTRL_APALP) | 0x0f);
1048 if (retval)
1049 goto out;
1050
1051 /* Turn off external DAC. */
1052 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1053 if (retval)
1054 goto out;
1055 msleep(2);
1056 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1057 if (retval)
1058 goto out;
1059
1060 /* Turn off master power. */
1061 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1062 if (retval)
1063 goto out;
1064
1065out:
1066 /* Stop DAC master clock. */
1067 clk_disable(chip->board->dac_clk);
1068
1069 ssc_free(chip->ssc);
1070 snd_card_free(card);
1071
1072 return 0;
1073}
1074
1075#ifdef CONFIG_PM_SLEEP
1076
1077static int snd_at73c213_suspend(struct device *dev)
1078{
1079 struct snd_card *card = dev_get_drvdata(dev);
1080 struct snd_at73c213 *chip = card->private_data;
1081
1082 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1083 clk_disable(chip->board->dac_clk);
1084
1085 return 0;
1086}
1087
1088static int snd_at73c213_resume(struct device *dev)
1089{
1090 struct snd_card *card = dev_get_drvdata(dev);
1091 struct snd_at73c213 *chip = card->private_data;
1092
1093 clk_enable(chip->board->dac_clk);
1094 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1095
1096 return 0;
1097}
1098
1099static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
1100 snd_at73c213_resume);
1101#define AT73C213_PM_OPS (&at73c213_pm_ops)
1102
1103#else
1104#define AT73C213_PM_OPS NULL
1105#endif
1106
1107static struct spi_driver at73c213_driver = {
1108 .driver = {
1109 .name = "at73c213",
1110 .pm = AT73C213_PM_OPS,
1111 },
1112 .probe = snd_at73c213_probe,
1113 .remove = snd_at73c213_remove,
1114};
1115
1116module_spi_driver(at73c213_driver);
1117
1118MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
1119MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1120MODULE_LICENSE("GPL");