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[pohmelfs.git] / sound / spi / at73c213.c
blob4dd051bdf4fd1365498cc0740173d95b3b4bdc60
1 /*
2 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
3 *
4 * Copyright (C) 2006-2007 Atmel Norway
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
10
11 /*#define DEBUG*/
12
13 #include <linux/clk.h>
14 #include <linux/err.h>
15 #include <linux/delay.h>
16 #include <linux/device.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/module.h>
21 #include <linux/mutex.h>
22 #include <linux/platform_device.h>
23 #include <linux/io.h>
24
25 #include <sound/initval.h>
26 #include <sound/control.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29
30 #include <linux/atmel-ssc.h>
31
32 #include <linux/spi/spi.h>
33 #include <linux/spi/at73c213.h>
34
35 #include "at73c213.h"
36
37 #define BITRATE_MIN 8000 /* Hardware limit? */
38 #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
39 #define BITRATE_MAX 50000 /* Hardware limit. */
40
41 /* Initial (hardware reset) AT73C213 register values. */
42 static u8 snd_at73c213_original_image[18] =
43 {
44 0x00, /* 00 - CTRL */
45 0x05, /* 01 - LLIG */
46 0x05, /* 02 - RLIG */
47 0x08, /* 03 - LPMG */
48 0x08, /* 04 - RPMG */
49 0x00, /* 05 - LLOG */
50 0x00, /* 06 - RLOG */
51 0x22, /* 07 - OLC */
52 0x09, /* 08 - MC */
53 0x00, /* 09 - CSFC */
54 0x00, /* 0A - MISC */
55 0x00, /* 0B - */
56 0x00, /* 0C - PRECH */
57 0x05, /* 0D - AUXG */
58 0x00, /* 0E - */
59 0x00, /* 0F - */
60 0x00, /* 10 - RST */
61 0x00, /* 11 - PA_CTRL */
62 };
63
64 struct snd_at73c213 {
65 struct snd_card *card;
66 struct snd_pcm *pcm;
67 struct snd_pcm_substream *substream;
68 struct at73c213_board_info *board;
69 int irq;
70 int period;
71 unsigned long bitrate;
72 struct ssc_device *ssc;
73 struct spi_device *spi;
74 u8 spi_wbuffer[2];
75 u8 spi_rbuffer[2];
76 /* Image of the SPI registers in AT73C213. */
77 u8 reg_image[18];
78 /* Protect SSC registers against concurrent access. */
79 spinlock_t lock;
80 /* Protect mixer registers against concurrent access. */
81 struct mutex mixer_lock;
82 };
83
84 #define get_chip(card) ((struct snd_at73c213 *)card->private_data)
85
86 static int
87 snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
88 {
89 struct spi_message msg;
90 struct spi_transfer msg_xfer = {
91 .len = 2,
92 .cs_change = 0,
93 };
94 int retval;
95
96 spi_message_init(&msg);
97
98 chip->spi_wbuffer[0] = reg;
99 chip->spi_wbuffer[1] = val;
100
101 msg_xfer.tx_buf = chip->spi_wbuffer;
102 msg_xfer.rx_buf = chip->spi_rbuffer;
103 spi_message_add_tail(&msg_xfer, &msg);
104
105 retval = spi_sync(chip->spi, &msg);
106
107 if (!retval)
108 chip->reg_image[reg] = val;
109
110 return retval;
111 }
112
113 static struct snd_pcm_hardware snd_at73c213_playback_hw = {
114 .info = SNDRV_PCM_INFO_INTERLEAVED |
115 SNDRV_PCM_INFO_BLOCK_TRANSFER,
116 .formats = SNDRV_PCM_FMTBIT_S16_BE,
117 .rates = SNDRV_PCM_RATE_CONTINUOUS,
118 .rate_min = 8000, /* Replaced by chip->bitrate later. */
119 .rate_max = 50000, /* Replaced by chip->bitrate later. */
120 .channels_min = 1,
121 .channels_max = 2,
122 .buffer_bytes_max = 64 * 1024 - 1,
123 .period_bytes_min = 512,
124 .period_bytes_max = 64 * 1024 - 1,
125 .periods_min = 4,
126 .periods_max = 1024,
127 };
128
129 /*
130 * Calculate and set bitrate and divisions.
131 */
132 static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
133 {
134 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
135 unsigned long dac_rate_new, ssc_div;
136 int status;
137 unsigned long ssc_div_max, ssc_div_min;
138 int max_tries;
139
140 /*
141 * We connect two clocks here, picking divisors so the I2S clocks
142 * out data at the same rate the DAC clocks it in ... and as close
143 * as practical to the desired target rate.
144 *
145 * The DAC master clock (MCLK) is programmable, and is either 256
146 * or (not here) 384 times the I2S output clock (BCLK).
147 */
148
149 /* SSC clock / (bitrate * stereo * 16-bit). */
150 ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
151 ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
152 ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
153 max_tries = (ssc_div_max - ssc_div_min) / 2;
154
155 if (max_tries < 1)
156 max_tries = 1;
157
158 /* ssc_div must be even. */
159 ssc_div = (ssc_div + 1) & ~1UL;
160
161 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
162 ssc_div -= 2;
163 if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
164 return -ENXIO;
165 }
166
167 /* Search for a possible bitrate. */
168 do {
169 /* SSC clock / (ssc divider * 16-bit * stereo). */
170 if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
171 return -ENXIO;
172
173 /* 256 / (2 * 16) = 8 */
174 dac_rate_new = 8 * (ssc_rate / ssc_div);
175
176 status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
177 if (status < 0)
178 return status;
179
180 /* Ignore difference smaller than 256 Hz. */
181 if ((status/256) == (dac_rate_new/256))
182 goto set_rate;
183
184 ssc_div += 2;
185 } while (--max_tries);
186
187 /* Not able to find a valid bitrate. */
188 return -ENXIO;
189
190 set_rate:
191 status = clk_set_rate(chip->board->dac_clk, status);
192 if (status < 0)
193 return status;
194
195 /* Set divider in SSC device. */
196 ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
197
198 /* SSC clock / (ssc divider * 16-bit * stereo). */
199 chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
200
201 dev_info(&chip->spi->dev,
202 "at73c213: supported bitrate is %lu (%lu divider)\n",
203 chip->bitrate, ssc_div);
204
205 return 0;
206 }
207
208 static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
209 {
210 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
211 struct snd_pcm_runtime *runtime = substream->runtime;
212 int err;
213
214 /* ensure buffer_size is a multiple of period_size */
215 err = snd_pcm_hw_constraint_integer(runtime,
216 SNDRV_PCM_HW_PARAM_PERIODS);
217 if (err < 0)
218 return err;
219 snd_at73c213_playback_hw.rate_min = chip->bitrate;
220 snd_at73c213_playback_hw.rate_max = chip->bitrate;
221 runtime->hw = snd_at73c213_playback_hw;
222 chip->substream = substream;
223
224 return 0;
225 }
226
227 static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
228 {
229 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
230 chip->substream = NULL;
231 return 0;
232 }
233
234 static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
235 struct snd_pcm_hw_params *hw_params)
236 {
237 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
238 int channels = params_channels(hw_params);
239 int val;
240
241 val = ssc_readl(chip->ssc->regs, TFMR);
242 val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
243 ssc_writel(chip->ssc->regs, TFMR, val);
244
245 return snd_pcm_lib_malloc_pages(substream,
246 params_buffer_bytes(hw_params));
247 }
248
249 static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
250 {
251 return snd_pcm_lib_free_pages(substream);
252 }
253
254 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
255 {
256 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
257 struct snd_pcm_runtime *runtime = substream->runtime;
258 int block_size;
259
260 block_size = frames_to_bytes(runtime, runtime->period_size);
261
262 chip->period = 0;
263
264 ssc_writel(chip->ssc->regs, PDC_TPR,
265 (long)runtime->dma_addr);
266 ssc_writel(chip->ssc->regs, PDC_TCR,
267 runtime->period_size * runtime->channels);
268 ssc_writel(chip->ssc->regs, PDC_TNPR,
269 (long)runtime->dma_addr + block_size);
270 ssc_writel(chip->ssc->regs, PDC_TNCR,
271 runtime->period_size * runtime->channels);
272
273 return 0;
274 }
275
276 static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
277 int cmd)
278 {
279 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
280 int retval = 0;
281
282 spin_lock(&chip->lock);
283
284 switch (cmd) {
285 case SNDRV_PCM_TRIGGER_START:
286 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
287 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
288 break;
289 case SNDRV_PCM_TRIGGER_STOP:
290 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
291 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
292 break;
293 default:
294 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
295 retval = -EINVAL;
296 break;
297 }
298
299 spin_unlock(&chip->lock);
300
301 return retval;
302 }
303
304 static snd_pcm_uframes_t
305 snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
306 {
307 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
308 struct snd_pcm_runtime *runtime = substream->runtime;
309 snd_pcm_uframes_t pos;
310 unsigned long bytes;
311
312 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
313 - (unsigned long)runtime->dma_addr;
314
315 pos = bytes_to_frames(runtime, bytes);
316 if (pos >= runtime->buffer_size)
317 pos -= runtime->buffer_size;
318
319 return pos;
320 }
321
322 static struct snd_pcm_ops at73c213_playback_ops = {
323 .open = snd_at73c213_pcm_open,
324 .close = snd_at73c213_pcm_close,
325 .ioctl = snd_pcm_lib_ioctl,
326 .hw_params = snd_at73c213_pcm_hw_params,
327 .hw_free = snd_at73c213_pcm_hw_free,
328 .prepare = snd_at73c213_pcm_prepare,
329 .trigger = snd_at73c213_pcm_trigger,
330 .pointer = snd_at73c213_pcm_pointer,
331 };
332
333 static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
334 {
335 struct snd_pcm *pcm;
336 int retval;
337
338 retval = snd_pcm_new(chip->card, chip->card->shortname,
339 device, 1, 0, &pcm);
340 if (retval < 0)
341 goto out;
342
343 pcm->private_data = chip;
344 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
345 strcpy(pcm->name, "at73c213");
346 chip->pcm = pcm;
347
348 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
349
350 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
351 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
352 64 * 1024, 64 * 1024);
353 out:
354 return retval;
355 }
356
357 static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
358 {
359 struct snd_at73c213 *chip = dev_id;
360 struct snd_pcm_runtime *runtime = chip->substream->runtime;
361 u32 status;
362 int offset;
363 int block_size;
364 int next_period;
365 int retval = IRQ_NONE;
366
367 spin_lock(&chip->lock);
368
369 block_size = frames_to_bytes(runtime, runtime->period_size);
370 status = ssc_readl(chip->ssc->regs, IMR);
371
372 if (status & SSC_BIT(IMR_ENDTX)) {
373 chip->period++;
374 if (chip->period == runtime->periods)
375 chip->period = 0;
376 next_period = chip->period + 1;
377 if (next_period == runtime->periods)
378 next_period = 0;
379
380 offset = block_size * next_period;
381
382 ssc_writel(chip->ssc->regs, PDC_TNPR,
383 (long)runtime->dma_addr + offset);
384 ssc_writel(chip->ssc->regs, PDC_TNCR,
385 runtime->period_size * runtime->channels);
386 retval = IRQ_HANDLED;
387 }
388
389 ssc_readl(chip->ssc->regs, IMR);
390 spin_unlock(&chip->lock);
391
392 if (status & SSC_BIT(IMR_ENDTX))
393 snd_pcm_period_elapsed(chip->substream);
394
395 return retval;
396 }
397
398 /*
399 * Mixer functions.
400 */
401 static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
402 struct snd_ctl_elem_value *ucontrol)
403 {
404 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
405 int reg = kcontrol->private_value & 0xff;
406 int shift = (kcontrol->private_value >> 8) & 0xff;
407 int mask = (kcontrol->private_value >> 16) & 0xff;
408 int invert = (kcontrol->private_value >> 24) & 0xff;
409
410 mutex_lock(&chip->mixer_lock);
411
412 ucontrol->value.integer.value[0] =
413 (chip->reg_image[reg] >> shift) & mask;
414
415 if (invert)
416 ucontrol->value.integer.value[0] =
417 mask - ucontrol->value.integer.value[0];
418
419 mutex_unlock(&chip->mixer_lock);
420
421 return 0;
422 }
423
424 static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
425 struct snd_ctl_elem_value *ucontrol)
426 {
427 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
428 int reg = kcontrol->private_value & 0xff;
429 int shift = (kcontrol->private_value >> 8) & 0xff;
430 int mask = (kcontrol->private_value >> 16) & 0xff;
431 int invert = (kcontrol->private_value >> 24) & 0xff;
432 int change, retval;
433 unsigned short val;
434
435 val = (ucontrol->value.integer.value[0] & mask);
436 if (invert)
437 val = mask - val;
438 val <<= shift;
439
440 mutex_lock(&chip->mixer_lock);
441
442 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
443 change = val != chip->reg_image[reg];
444 retval = snd_at73c213_write_reg(chip, reg, val);
445
446 mutex_unlock(&chip->mixer_lock);
447
448 if (retval)
449 return retval;
450
451 return change;
452 }
453
454 static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
455 struct snd_ctl_elem_info *uinfo)
456 {
457 int mask = (kcontrol->private_value >> 24) & 0xff;
458
459 if (mask == 1)
460 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
461 else
462 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
463
464 uinfo->count = 2;
465 uinfo->value.integer.min = 0;
466 uinfo->value.integer.max = mask;
467
468 return 0;
469 }
470
471 static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
472 struct snd_ctl_elem_value *ucontrol)
473 {
474 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
475 int left_reg = kcontrol->private_value & 0xff;
476 int right_reg = (kcontrol->private_value >> 8) & 0xff;
477 int shift_left = (kcontrol->private_value >> 16) & 0x07;
478 int shift_right = (kcontrol->private_value >> 19) & 0x07;
479 int mask = (kcontrol->private_value >> 24) & 0xff;
480 int invert = (kcontrol->private_value >> 22) & 1;
481
482 mutex_lock(&chip->mixer_lock);
483
484 ucontrol->value.integer.value[0] =
485 (chip->reg_image[left_reg] >> shift_left) & mask;
486 ucontrol->value.integer.value[1] =
487 (chip->reg_image[right_reg] >> shift_right) & mask;
488
489 if (invert) {
490 ucontrol->value.integer.value[0] =
491 mask - ucontrol->value.integer.value[0];
492 ucontrol->value.integer.value[1] =
493 mask - ucontrol->value.integer.value[1];
494 }
495
496 mutex_unlock(&chip->mixer_lock);
497
498 return 0;
499 }
500
501 static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
502 struct snd_ctl_elem_value *ucontrol)
503 {
504 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
505 int left_reg = kcontrol->private_value & 0xff;
506 int right_reg = (kcontrol->private_value >> 8) & 0xff;
507 int shift_left = (kcontrol->private_value >> 16) & 0x07;
508 int shift_right = (kcontrol->private_value >> 19) & 0x07;
509 int mask = (kcontrol->private_value >> 24) & 0xff;
510 int invert = (kcontrol->private_value >> 22) & 1;
511 int change, retval;
512 unsigned short val1, val2;
513
514 val1 = ucontrol->value.integer.value[0] & mask;
515 val2 = ucontrol->value.integer.value[1] & mask;
516 if (invert) {
517 val1 = mask - val1;
518 val2 = mask - val2;
519 }
520 val1 <<= shift_left;
521 val2 <<= shift_right;
522
523 mutex_lock(&chip->mixer_lock);
524
525 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
526 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
527 change = val1 != chip->reg_image[left_reg]
528 || val2 != chip->reg_image[right_reg];
529 retval = snd_at73c213_write_reg(chip, left_reg, val1);
530 if (retval) {
531 mutex_unlock(&chip->mixer_lock);
532 goto out;
533 }
534 retval = snd_at73c213_write_reg(chip, right_reg, val2);
535 if (retval) {
536 mutex_unlock(&chip->mixer_lock);
537 goto out;
538 }
539
540 mutex_unlock(&chip->mixer_lock);
541
542 return change;
543
544 out:
545 return retval;
546 }
547
548 #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
549
550 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
551 struct snd_ctl_elem_value *ucontrol)
552 {
553 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
554 int reg = kcontrol->private_value & 0xff;
555 int shift = (kcontrol->private_value >> 8) & 0xff;
556 int invert = (kcontrol->private_value >> 24) & 0xff;
557
558 mutex_lock(&chip->mixer_lock);
559
560 ucontrol->value.integer.value[0] =
561 (chip->reg_image[reg] >> shift) & 0x01;
562
563 if (invert)
564 ucontrol->value.integer.value[0] =
565 0x01 - ucontrol->value.integer.value[0];
566
567 mutex_unlock(&chip->mixer_lock);
568
569 return 0;
570 }
571
572 static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
573 struct snd_ctl_elem_value *ucontrol)
574 {
575 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
576 int reg = kcontrol->private_value & 0xff;
577 int shift = (kcontrol->private_value >> 8) & 0xff;
578 int mask = (kcontrol->private_value >> 16) & 0xff;
579 int invert = (kcontrol->private_value >> 24) & 0xff;
580 int change, retval;
581 unsigned short val;
582
583 if (ucontrol->value.integer.value[0])
584 val = mask;
585 else
586 val = 0;
587
588 if (invert)
589 val = mask - val;
590 val <<= shift;
591
592 mutex_lock(&chip->mixer_lock);
593
594 val |= (chip->reg_image[reg] & ~(mask << shift));
595 change = val != chip->reg_image[reg];
596
597 retval = snd_at73c213_write_reg(chip, reg, val);
598
599 mutex_unlock(&chip->mixer_lock);
600
601 if (retval)
602 return retval;
603
604 return change;
605 }
606
607 static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
608 struct snd_ctl_elem_info *uinfo)
609 {
610 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
611 uinfo->count = 1;
612 uinfo->value.integer.min = 0;
613 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
614
615 return 0;
616 }
617
618 static int snd_at73c213_line_capture_volume_info(
619 struct snd_kcontrol *kcontrol,
620 struct snd_ctl_elem_info *uinfo)
621 {
622 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
623 uinfo->count = 2;
624 /* When inverted will give values 0x10001 => 0. */
625 uinfo->value.integer.min = 14;
626 uinfo->value.integer.max = 31;
627
628 return 0;
629 }
630
631 static int snd_at73c213_aux_capture_volume_info(
632 struct snd_kcontrol *kcontrol,
633 struct snd_ctl_elem_info *uinfo)
634 {
635 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
636 uinfo->count = 1;
637 /* When inverted will give values 0x10001 => 0. */
638 uinfo->value.integer.min = 14;
639 uinfo->value.integer.max = 31;
640
641 return 0;
642 }
643
644 #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
645 { \
646 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
647 .name = xname, \
648 .index = xindex, \
649 .info = snd_at73c213_mono_switch_info, \
650 .get = snd_at73c213_mono_switch_get, \
651 .put = snd_at73c213_mono_switch_put, \
652 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
653 }
654
655 #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
656 { \
657 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
658 .name = xname, \
659 .index = xindex, \
660 .info = snd_at73c213_stereo_info, \
661 .get = snd_at73c213_stereo_get, \
662 .put = snd_at73c213_stereo_put, \
663 .private_value = (left_reg | (right_reg << 8) \
664 | (shift_left << 16) | (shift_right << 19) \
665 | (mask << 24) | (invert << 22)) \
666 }
667
668 static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = {
669 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
670 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
671 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
672 AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
673 AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
674 0x01, 0),
675 {
676 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
677 .name = "PA Playback Volume",
678 .index = 0,
679 .info = snd_at73c213_pa_volume_info,
680 .get = snd_at73c213_mono_get,
681 .put = snd_at73c213_mono_put,
682 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
683 (0x0f << 16) | (1 << 24),
684 },
685 AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
686 0x01, 1),
687 AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
688 {
689 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
690 .name = "Aux Capture Volume",
691 .index = 0,
692 .info = snd_at73c213_aux_capture_volume_info,
693 .get = snd_at73c213_mono_get,
694 .put = snd_at73c213_mono_put,
695 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
696 },
697 AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
698 0x01, 0),
699 {
700 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
701 .name = "Line Capture Volume",
702 .index = 0,
703 .info = snd_at73c213_line_capture_volume_info,
704 .get = snd_at73c213_stereo_get,
705 .put = snd_at73c213_stereo_put,
706 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
707 | (0x1f << 24) | (1 << 22),
708 },
709 AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
710 };
711
712 static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip)
713 {
714 struct snd_card *card;
715 int errval, idx;
716
717 if (chip == NULL || chip->pcm == NULL)
718 return -EINVAL;
719
720 card = chip->card;
721
722 strcpy(card->mixername, chip->pcm->name);
723
724 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
725 errval = snd_ctl_add(card,
726 snd_ctl_new1(&snd_at73c213_controls[idx],
727 chip));
728 if (errval < 0)
729 goto cleanup;
730 }
731
732 return 0;
733
734 cleanup:
735 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
736 struct snd_kcontrol *kctl;
737 kctl = snd_ctl_find_numid(card, idx);
738 if (kctl)
739 snd_ctl_remove(card, kctl);
740 }
741 return errval;
742 }
743
744 /*
745 * Device functions
746 */
747 static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip)
748 {
749 /*
750 * Continuous clock output.
751 * Starts on falling TF.
752 * Delay 1 cycle (1 bit).
753 * Periode is 16 bit (16 - 1).
754 */
755 ssc_writel(chip->ssc->regs, TCMR,
756 SSC_BF(TCMR_CKO, 1)
757 | SSC_BF(TCMR_START, 4)
758 | SSC_BF(TCMR_STTDLY, 1)
759 | SSC_BF(TCMR_PERIOD, 16 - 1));
760 /*
761 * Data length is 16 bit (16 - 1).
762 * Transmit MSB first.
763 * Transmit 2 words each transfer.
764 * Frame sync length is 16 bit (16 - 1).
765 * Frame starts on negative pulse.
766 */
767 ssc_writel(chip->ssc->regs, TFMR,
768 SSC_BF(TFMR_DATLEN, 16 - 1)
769 | SSC_BIT(TFMR_MSBF)
770 | SSC_BF(TFMR_DATNB, 1)
771 | SSC_BF(TFMR_FSLEN, 16 - 1)
772 | SSC_BF(TFMR_FSOS, 1));
773
774 return 0;
775 }
776
777 static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip)
778 {
779 int retval;
780 unsigned char dac_ctrl = 0;
781
782 retval = snd_at73c213_set_bitrate(chip);
783 if (retval)
784 goto out;
785
786 /* Enable DAC master clock. */
787 clk_enable(chip->board->dac_clk);
788
789 /* Initialize at73c213 on SPI bus. */
790 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
791 if (retval)
792 goto out_clk;
793 msleep(1);
794 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
795 if (retval)
796 goto out_clk;
797
798 /* Precharge everything. */
799 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
800 if (retval)
801 goto out_clk;
802 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
803 if (retval)
804 goto out_clk;
805 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
806 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
807 if (retval)
808 goto out_clk;
809
810 msleep(50);
811
812 /* Stop precharging PA. */
813 retval = snd_at73c213_write_reg(chip, PA_CTRL,
814 (1<<PA_CTRL_APALP) | 0x0f);
815 if (retval)
816 goto out_clk;
817
818 msleep(450);
819
820 /* Stop precharging DAC, turn on master power. */
821 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
822 if (retval)
823 goto out_clk;
824
825 msleep(1);
826
827 /* Turn on DAC. */
828 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
829 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
830
831 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
832 if (retval)
833 goto out_clk;
834
835 /* Mute sound. */
836 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
837 if (retval)
838 goto out_clk;
839 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
840 if (retval)
841 goto out_clk;
842 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
843 if (retval)
844 goto out_clk;
845 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
846 if (retval)
847 goto out_clk;
848 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
849 if (retval)
850 goto out_clk;
851 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
852 if (retval)
853 goto out_clk;
854 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
855 if (retval)
856 goto out_clk;
857
858 /* Enable I2S device, i.e. clock output. */
859 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
860
861 goto out;
862
863 out_clk:
864 clk_disable(chip->board->dac_clk);
865 out:
866 return retval;
867 }
868
869 static int snd_at73c213_dev_free(struct snd_device *device)
870 {
871 struct snd_at73c213 *chip = device->device_data;
872
873 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
874 if (chip->irq >= 0) {
875 free_irq(chip->irq, chip);
876 chip->irq = -1;
877 }
878
879 return 0;
880 }
881
882 static int __devinit snd_at73c213_dev_init(struct snd_card *card,
883 struct spi_device *spi)
884 {
885 static struct snd_device_ops ops = {
886 .dev_free = snd_at73c213_dev_free,
887 };
888 struct snd_at73c213 *chip = get_chip(card);
889 int irq, retval;
890
891 irq = chip->ssc->irq;
892 if (irq < 0)
893 return irq;
894
895 spin_lock_init(&chip->lock);
896 mutex_init(&chip->mixer_lock);
897 chip->card = card;
898 chip->irq = -1;
899
900 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
901 if (retval) {
902 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
903 goto out;
904 }
905 chip->irq = irq;
906
907 memcpy(&chip->reg_image, &snd_at73c213_original_image,
908 sizeof(snd_at73c213_original_image));
909
910 retval = snd_at73c213_ssc_init(chip);
911 if (retval)
912 goto out_irq;
913
914 retval = snd_at73c213_chip_init(chip);
915 if (retval)
916 goto out_irq;
917
918 retval = snd_at73c213_pcm_new(chip, 0);
919 if (retval)
920 goto out_irq;
921
922 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
923 if (retval)
924 goto out_irq;
925
926 retval = snd_at73c213_mixer(chip);
927 if (retval)
928 goto out_snd_dev;
929
930 snd_card_set_dev(card, &spi->dev);
931
932 goto out;
933
934 out_snd_dev:
935 snd_device_free(card, chip);
936 out_irq:
937 free_irq(chip->irq, chip);
938 chip->irq = -1;
939 out:
940 return retval;
941 }
942
943 static int __devinit snd_at73c213_probe(struct spi_device *spi)
944 {
945 struct snd_card *card;
946 struct snd_at73c213 *chip;
947 struct at73c213_board_info *board;
948 int retval;
949 char id[16];
950
951 board = spi->dev.platform_data;
952 if (!board) {
953 dev_dbg(&spi->dev, "no platform_data\n");
954 return -ENXIO;
955 }
956
957 if (!board->dac_clk) {
958 dev_dbg(&spi->dev, "no DAC clk\n");
959 return -ENXIO;
960 }
961
962 if (IS_ERR(board->dac_clk)) {
963 dev_dbg(&spi->dev, "no DAC clk\n");
964 return PTR_ERR(board->dac_clk);
965 }
966
967 /* Allocate "card" using some unused identifiers. */
968 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
969 retval = snd_card_create(-1, id, THIS_MODULE,
970 sizeof(struct snd_at73c213), &card);
971 if (retval < 0)
972 goto out;
973
974 chip = card->private_data;
975 chip->spi = spi;
976 chip->board = board;
977
978 chip->ssc = ssc_request(board->ssc_id);
979 if (IS_ERR(chip->ssc)) {
980 dev_dbg(&spi->dev, "could not get ssc%d device\n",
981 board->ssc_id);
982 retval = PTR_ERR(chip->ssc);
983 goto out_card;
984 }
985
986 retval = snd_at73c213_dev_init(card, spi);
987 if (retval)
988 goto out_ssc;
989
990 strcpy(card->driver, "at73c213");
991 strcpy(card->shortname, board->shortname);
992 sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
993
994 retval = snd_card_register(card);
995 if (retval)
996 goto out_ssc;
997
998 dev_set_drvdata(&spi->dev, card);
999
1000 goto out;
1001
1002 out_ssc:
1003 ssc_free(chip->ssc);
1004 out_card:
1005 snd_card_free(card);
1006 out:
1007 return retval;
1008 }
1009
1010 static int __devexit snd_at73c213_remove(struct spi_device *spi)
1011 {
1012 struct snd_card *card = dev_get_drvdata(&spi->dev);
1013 struct snd_at73c213 *chip = card->private_data;
1014 int retval;
1015
1016 /* Stop playback. */
1017 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1018
1019 /* Mute sound. */
1020 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1021 if (retval)
1022 goto out;
1023 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1024 if (retval)
1025 goto out;
1026 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1027 if (retval)
1028 goto out;
1029 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1030 if (retval)
1031 goto out;
1032 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1033 if (retval)
1034 goto out;
1035 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1036 if (retval)
1037 goto out;
1038 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1039 if (retval)
1040 goto out;
1041
1042 /* Turn off PA. */
1043 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1044 chip->reg_image[PA_CTRL] | 0x0f);
1045 if (retval)
1046 goto out;
1047 msleep(10);
1048 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1049 (1 << PA_CTRL_APALP) | 0x0f);
1050 if (retval)
1051 goto out;
1052
1053 /* Turn off external DAC. */
1054 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1055 if (retval)
1056 goto out;
1057 msleep(2);
1058 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1059 if (retval)
1060 goto out;
1061
1062 /* Turn off master power. */
1063 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1064 if (retval)
1065 goto out;
1066
1067 out:
1068 /* Stop DAC master clock. */
1069 clk_disable(chip->board->dac_clk);
1070
1071 ssc_free(chip->ssc);
1072 snd_card_free(card);
1073 dev_set_drvdata(&spi->dev, NULL);
1074
1075 return 0;
1076 }
1077
1078 #ifdef CONFIG_PM
1079 static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg)
1080 {
1081 struct snd_card *card = dev_get_drvdata(&spi->dev);
1082 struct snd_at73c213 *chip = card->private_data;
1083
1084 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1085 clk_disable(chip->board->dac_clk);
1086
1087 return 0;
1088 }
1089
1090 static int snd_at73c213_resume(struct spi_device *spi)
1091 {
1092 struct snd_card *card = dev_get_drvdata(&spi->dev);
1093 struct snd_at73c213 *chip = card->private_data;
1094
1095 clk_enable(chip->board->dac_clk);
1096 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1097
1098 return 0;
1099 }
1100 #else
1101 #define snd_at73c213_suspend NULL
1102 #define snd_at73c213_resume NULL
1103 #endif
1104
1105 static struct spi_driver at73c213_driver = {
1106 .driver = {
1107 .name = "at73c213",
1108 },
1109 .probe = snd_at73c213_probe,
1110 .suspend = snd_at73c213_suspend,
1111 .resume = snd_at73c213_resume,
1112 .remove = __devexit_p(snd_at73c213_remove),
1113 };
1114
1115 static int __init at73c213_init(void)
1116 {
1117 return spi_register_driver(&at73c213_driver);
1118 }
1119 module_init(at73c213_init);
1120
1121 static void __exit at73c213_exit(void)
1122 {
1123 spi_unregister_driver(&at73c213_driver);
1124 }
1125 module_exit(at73c213_exit);
1126
1127 MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
1128 MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1129 MODULE_LICENSE("GPL");