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USB: usb_serial_console: allocate fake tty and termios before calling driver open...
[linux-2.6/mini2440.git] / sound / spi / at73c213.c
blob89d6e9c351405c8d186176d7b80454d24153ad24
1 /*
2 * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
3 *
4 * Copyright (C) 2006-2007 Atmel Norway
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
10
11 /*#define DEBUG*/
12
13 #include <linux/clk.h>
14 #include <linux/err.h>
15 #include <linux/delay.h>
16 #include <linux/device.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/module.h>
21 #include <linux/mutex.h>
22 #include <linux/platform_device.h>
23 #include <linux/io.h>
24
25 #include <sound/initval.h>
26 #include <sound/control.h>
27 #include <sound/core.h>
28 #include <sound/pcm.h>
29
30 #include <linux/atmel-ssc.h>
31
32 #include <linux/spi/spi.h>
33 #include <linux/spi/at73c213.h>
34
35 #include "at73c213.h"
36
37 #define BITRATE_MIN 8000 /* Hardware limit? */
38 #define BITRATE_TARGET CONFIG_SND_AT73C213_TARGET_BITRATE
39 #define BITRATE_MAX 50000 /* Hardware limit. */
40
41 /* Initial (hardware reset) AT73C213 register values. */
42 static u8 snd_at73c213_original_image[18] =
43 {
44 0x00, /* 00 - CTRL */
45 0x05, /* 01 - LLIG */
46 0x05, /* 02 - RLIG */
47 0x08, /* 03 - LPMG */
48 0x08, /* 04 - RPMG */
49 0x00, /* 05 - LLOG */
50 0x00, /* 06 - RLOG */
51 0x22, /* 07 - OLC */
52 0x09, /* 08 - MC */
53 0x00, /* 09 - CSFC */
54 0x00, /* 0A - MISC */
55 0x00, /* 0B - */
56 0x00, /* 0C - PRECH */
57 0x05, /* 0D - AUXG */
58 0x00, /* 0E - */
59 0x00, /* 0F - */
60 0x00, /* 10 - RST */
61 0x00, /* 11 - PA_CTRL */
62 };
63
64 struct snd_at73c213 {
65 struct snd_card *card;
66 struct snd_pcm *pcm;
67 struct snd_pcm_substream *substream;
68 struct at73c213_board_info *board;
69 int irq;
70 int period;
71 unsigned long bitrate;
72 struct clk *bitclk;
73 struct ssc_device *ssc;
74 struct spi_device *spi;
75 u8 spi_wbuffer[2];
76 u8 spi_rbuffer[2];
77 /* Image of the SPI registers in AT73C213. */
78 u8 reg_image[18];
79 /* Protect SSC registers against concurrent access. */
80 spinlock_t lock;
81 /* Protect mixer registers against concurrent access. */
82 struct mutex mixer_lock;
83 };
84
85 #define get_chip(card) ((struct snd_at73c213 *)card->private_data)
86
87 static int
88 snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
89 {
90 struct spi_message msg;
91 struct spi_transfer msg_xfer = {
92 .len = 2,
93 .cs_change = 0,
94 };
95 int retval;
96
97 spi_message_init(&msg);
98
99 chip->spi_wbuffer[0] = reg;
100 chip->spi_wbuffer[1] = val;
101
102 msg_xfer.tx_buf = chip->spi_wbuffer;
103 msg_xfer.rx_buf = chip->spi_rbuffer;
104 spi_message_add_tail(&msg_xfer, &msg);
105
106 retval = spi_sync(chip->spi, &msg);
107
108 if (!retval)
109 chip->reg_image[reg] = val;
110
111 return retval;
112 }
113
114 static struct snd_pcm_hardware snd_at73c213_playback_hw = {
115 .info = SNDRV_PCM_INFO_INTERLEAVED |
116 SNDRV_PCM_INFO_BLOCK_TRANSFER,
117 .formats = SNDRV_PCM_FMTBIT_S16_BE,
118 .rates = SNDRV_PCM_RATE_CONTINUOUS,
119 .rate_min = 8000, /* Replaced by chip->bitrate later. */
120 .rate_max = 50000, /* Replaced by chip->bitrate later. */
121 .channels_min = 2,
122 .channels_max = 2,
123 .buffer_bytes_max = 64 * 1024 - 1,
124 .period_bytes_min = 512,
125 .period_bytes_max = 64 * 1024 - 1,
126 .periods_min = 4,
127 .periods_max = 1024,
128 };
129
130 /*
131 * Calculate and set bitrate and divisions.
132 */
133 static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
134 {
135 unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
136 unsigned long dac_rate_new, ssc_div, 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 a power of 2. */
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
213 snd_at73c213_playback_hw.rate_min = chip->bitrate;
214 snd_at73c213_playback_hw.rate_max = chip->bitrate;
215 runtime->hw = snd_at73c213_playback_hw;
216 chip->substream = substream;
217
218 return 0;
219 }
220
221 static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
222 {
223 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
224 chip->substream = NULL;
225 return 0;
226 }
227
228 static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
229 struct snd_pcm_hw_params *hw_params)
230 {
231 return snd_pcm_lib_malloc_pages(substream,
232 params_buffer_bytes(hw_params));
233 }
234
235 static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
236 {
237 return snd_pcm_lib_free_pages(substream);
238 }
239
240 static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
241 {
242 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
243 struct snd_pcm_runtime *runtime = substream->runtime;
244 int block_size;
245
246 block_size = frames_to_bytes(runtime, runtime->period_size);
247
248 chip->period = 0;
249
250 ssc_writel(chip->ssc->regs, PDC_TPR,
251 (long)runtime->dma_addr);
252 ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2);
253 ssc_writel(chip->ssc->regs, PDC_TNPR,
254 (long)runtime->dma_addr + block_size);
255 ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);
256
257 return 0;
258 }
259
260 static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
261 int cmd)
262 {
263 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
264 int retval = 0;
265
266 spin_lock(&chip->lock);
267
268 switch (cmd) {
269 case SNDRV_PCM_TRIGGER_START:
270 ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
271 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
272 break;
273 case SNDRV_PCM_TRIGGER_STOP:
274 ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
275 ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
276 break;
277 default:
278 dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
279 retval = -EINVAL;
280 break;
281 }
282
283 spin_unlock(&chip->lock);
284
285 return retval;
286 }
287
288 static snd_pcm_uframes_t
289 snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
290 {
291 struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
292 struct snd_pcm_runtime *runtime = substream->runtime;
293 snd_pcm_uframes_t pos;
294 unsigned long bytes;
295
296 bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
297 - (unsigned long)runtime->dma_addr;
298
299 pos = bytes_to_frames(runtime, bytes);
300 if (pos >= runtime->buffer_size)
301 pos -= runtime->buffer_size;
302
303 return pos;
304 }
305
306 static struct snd_pcm_ops at73c213_playback_ops = {
307 .open = snd_at73c213_pcm_open,
308 .close = snd_at73c213_pcm_close,
309 .ioctl = snd_pcm_lib_ioctl,
310 .hw_params = snd_at73c213_pcm_hw_params,
311 .hw_free = snd_at73c213_pcm_hw_free,
312 .prepare = snd_at73c213_pcm_prepare,
313 .trigger = snd_at73c213_pcm_trigger,
314 .pointer = snd_at73c213_pcm_pointer,
315 };
316
317 static void snd_at73c213_pcm_free(struct snd_pcm *pcm)
318 {
319 struct snd_at73c213 *chip = snd_pcm_chip(pcm);
320 if (chip->pcm) {
321 snd_pcm_lib_preallocate_free_for_all(chip->pcm);
322 chip->pcm = NULL;
323 }
324 }
325
326 static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
327 {
328 struct snd_pcm *pcm;
329 int retval;
330
331 retval = snd_pcm_new(chip->card, chip->card->shortname,
332 device, 1, 0, &pcm);
333 if (retval < 0)
334 goto out;
335
336 pcm->private_data = chip;
337 pcm->private_free = snd_at73c213_pcm_free;
338 pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
339 strcpy(pcm->name, "at73c213");
340 chip->pcm = pcm;
341
342 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
343
344 retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
345 SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
346 64 * 1024, 64 * 1024);
347 out:
348 return retval;
349 }
350
351 static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
352 {
353 struct snd_at73c213 *chip = dev_id;
354 struct snd_pcm_runtime *runtime = chip->substream->runtime;
355 u32 status;
356 int offset;
357 int block_size;
358 int next_period;
359 int retval = IRQ_NONE;
360
361 spin_lock(&chip->lock);
362
363 block_size = frames_to_bytes(runtime, runtime->period_size);
364 status = ssc_readl(chip->ssc->regs, IMR);
365
366 if (status & SSC_BIT(IMR_ENDTX)) {
367 chip->period++;
368 if (chip->period == runtime->periods)
369 chip->period = 0;
370 next_period = chip->period + 1;
371 if (next_period == runtime->periods)
372 next_period = 0;
373
374 offset = block_size * next_period;
375
376 ssc_writel(chip->ssc->regs, PDC_TNPR,
377 (long)runtime->dma_addr + offset);
378 ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2);
379 retval = IRQ_HANDLED;
380 }
381
382 ssc_readl(chip->ssc->regs, IMR);
383 spin_unlock(&chip->lock);
384
385 if (status & SSC_BIT(IMR_ENDTX))
386 snd_pcm_period_elapsed(chip->substream);
387
388 return retval;
389 }
390
391 /*
392 * Mixer functions.
393 */
394 static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
395 struct snd_ctl_elem_value *ucontrol)
396 {
397 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
398 int reg = kcontrol->private_value & 0xff;
399 int shift = (kcontrol->private_value >> 8) & 0xff;
400 int mask = (kcontrol->private_value >> 16) & 0xff;
401 int invert = (kcontrol->private_value >> 24) & 0xff;
402
403 mutex_lock(&chip->mixer_lock);
404
405 ucontrol->value.integer.value[0] =
406 (chip->reg_image[reg] >> shift) & mask;
407
408 if (invert)
409 ucontrol->value.integer.value[0] =
410 mask - ucontrol->value.integer.value[0];
411
412 mutex_unlock(&chip->mixer_lock);
413
414 return 0;
415 }
416
417 static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
418 struct snd_ctl_elem_value *ucontrol)
419 {
420 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
421 int reg = kcontrol->private_value & 0xff;
422 int shift = (kcontrol->private_value >> 8) & 0xff;
423 int mask = (kcontrol->private_value >> 16) & 0xff;
424 int invert = (kcontrol->private_value >> 24) & 0xff;
425 int change, retval;
426 unsigned short val;
427
428 val = (ucontrol->value.integer.value[0] & mask);
429 if (invert)
430 val = mask - val;
431 val <<= shift;
432
433 mutex_lock(&chip->mixer_lock);
434
435 val = (chip->reg_image[reg] & ~(mask << shift)) | val;
436 change = val != chip->reg_image[reg];
437 retval = snd_at73c213_write_reg(chip, reg, val);
438
439 mutex_unlock(&chip->mixer_lock);
440
441 if (retval)
442 return retval;
443
444 return change;
445 }
446
447 static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
448 struct snd_ctl_elem_info *uinfo)
449 {
450 int mask = (kcontrol->private_value >> 24) & 0xff;
451
452 if (mask == 1)
453 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
454 else
455 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
456
457 uinfo->count = 2;
458 uinfo->value.integer.min = 0;
459 uinfo->value.integer.max = mask;
460
461 return 0;
462 }
463
464 static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
465 struct snd_ctl_elem_value *ucontrol)
466 {
467 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
468 int left_reg = kcontrol->private_value & 0xff;
469 int right_reg = (kcontrol->private_value >> 8) & 0xff;
470 int shift_left = (kcontrol->private_value >> 16) & 0x07;
471 int shift_right = (kcontrol->private_value >> 19) & 0x07;
472 int mask = (kcontrol->private_value >> 24) & 0xff;
473 int invert = (kcontrol->private_value >> 22) & 1;
474
475 mutex_lock(&chip->mixer_lock);
476
477 ucontrol->value.integer.value[0] =
478 (chip->reg_image[left_reg] >> shift_left) & mask;
479 ucontrol->value.integer.value[1] =
480 (chip->reg_image[right_reg] >> shift_right) & mask;
481
482 if (invert) {
483 ucontrol->value.integer.value[0] =
484 mask - ucontrol->value.integer.value[0];
485 ucontrol->value.integer.value[1] =
486 mask - ucontrol->value.integer.value[1];
487 }
488
489 mutex_unlock(&chip->mixer_lock);
490
491 return 0;
492 }
493
494 static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
495 struct snd_ctl_elem_value *ucontrol)
496 {
497 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
498 int left_reg = kcontrol->private_value & 0xff;
499 int right_reg = (kcontrol->private_value >> 8) & 0xff;
500 int shift_left = (kcontrol->private_value >> 16) & 0x07;
501 int shift_right = (kcontrol->private_value >> 19) & 0x07;
502 int mask = (kcontrol->private_value >> 24) & 0xff;
503 int invert = (kcontrol->private_value >> 22) & 1;
504 int change, retval;
505 unsigned short val1, val2;
506
507 val1 = ucontrol->value.integer.value[0] & mask;
508 val2 = ucontrol->value.integer.value[1] & mask;
509 if (invert) {
510 val1 = mask - val1;
511 val2 = mask - val2;
512 }
513 val1 <<= shift_left;
514 val2 <<= shift_right;
515
516 mutex_lock(&chip->mixer_lock);
517
518 val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
519 val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
520 change = val1 != chip->reg_image[left_reg]
521 || val2 != chip->reg_image[right_reg];
522 retval = snd_at73c213_write_reg(chip, left_reg, val1);
523 if (retval) {
524 mutex_unlock(&chip->mixer_lock);
525 goto out;
526 }
527 retval = snd_at73c213_write_reg(chip, right_reg, val2);
528 if (retval) {
529 mutex_unlock(&chip->mixer_lock);
530 goto out;
531 }
532
533 mutex_unlock(&chip->mixer_lock);
534
535 return change;
536
537 out:
538 return retval;
539 }
540
541 #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info
542
543 static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
544 struct snd_ctl_elem_value *ucontrol)
545 {
546 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
547 int reg = kcontrol->private_value & 0xff;
548 int shift = (kcontrol->private_value >> 8) & 0xff;
549 int invert = (kcontrol->private_value >> 24) & 0xff;
550
551 mutex_lock(&chip->mixer_lock);
552
553 ucontrol->value.integer.value[0] =
554 (chip->reg_image[reg] >> shift) & 0x01;
555
556 if (invert)
557 ucontrol->value.integer.value[0] =
558 0x01 - ucontrol->value.integer.value[0];
559
560 mutex_unlock(&chip->mixer_lock);
561
562 return 0;
563 }
564
565 static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
566 struct snd_ctl_elem_value *ucontrol)
567 {
568 struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
569 int reg = kcontrol->private_value & 0xff;
570 int shift = (kcontrol->private_value >> 8) & 0xff;
571 int mask = (kcontrol->private_value >> 16) & 0xff;
572 int invert = (kcontrol->private_value >> 24) & 0xff;
573 int change, retval;
574 unsigned short val;
575
576 if (ucontrol->value.integer.value[0])
577 val = mask;
578 else
579 val = 0;
580
581 if (invert)
582 val = mask - val;
583 val <<= shift;
584
585 mutex_lock(&chip->mixer_lock);
586
587 val |= (chip->reg_image[reg] & ~(mask << shift));
588 change = val != chip->reg_image[reg];
589
590 retval = snd_at73c213_write_reg(chip, reg, val);
591
592 mutex_unlock(&chip->mixer_lock);
593
594 if (retval)
595 return retval;
596
597 return change;
598 }
599
600 static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
601 struct snd_ctl_elem_info *uinfo)
602 {
603 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
604 uinfo->count = 1;
605 uinfo->value.integer.min = 0;
606 uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
607
608 return 0;
609 }
610
611 static int snd_at73c213_line_capture_volume_info(
612 struct snd_kcontrol *kcontrol,
613 struct snd_ctl_elem_info *uinfo)
614 {
615 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
616 uinfo->count = 2;
617 /* When inverted will give values 0x10001 => 0. */
618 uinfo->value.integer.min = 14;
619 uinfo->value.integer.max = 31;
620
621 return 0;
622 }
623
624 static int snd_at73c213_aux_capture_volume_info(
625 struct snd_kcontrol *kcontrol,
626 struct snd_ctl_elem_info *uinfo)
627 {
628 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
629 uinfo->count = 1;
630 /* When inverted will give values 0x10001 => 0. */
631 uinfo->value.integer.min = 14;
632 uinfo->value.integer.max = 31;
633
634 return 0;
635 }
636
637 #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \
638 { \
639 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
640 .name = xname, \
641 .index = xindex, \
642 .info = snd_at73c213_mono_switch_info, \
643 .get = snd_at73c213_mono_switch_get, \
644 .put = snd_at73c213_mono_switch_put, \
645 .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
646 }
647
648 #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
649 { \
650 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
651 .name = xname, \
652 .index = xindex, \
653 .info = snd_at73c213_stereo_info, \
654 .get = snd_at73c213_stereo_get, \
655 .put = snd_at73c213_stereo_put, \
656 .private_value = (left_reg | (right_reg << 8) \
657 | (shift_left << 16) | (shift_right << 19) \
658 | (mask << 24) | (invert << 22)) \
659 }
660
661 static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = {
662 AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
663 AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
664 AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
665 AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
666 AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
667 0x01, 0),
668 {
669 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
670 .name = "PA Playback Volume",
671 .index = 0,
672 .info = snd_at73c213_pa_volume_info,
673 .get = snd_at73c213_mono_get,
674 .put = snd_at73c213_mono_put,
675 .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
676 (0x0f << 16) | (1 << 24),
677 },
678 AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
679 0x01, 1),
680 AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
681 {
682 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
683 .name = "Aux Capture Volume",
684 .index = 0,
685 .info = snd_at73c213_aux_capture_volume_info,
686 .get = snd_at73c213_mono_get,
687 .put = snd_at73c213_mono_put,
688 .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
689 },
690 AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
691 0x01, 0),
692 {
693 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
694 .name = "Line Capture Volume",
695 .index = 0,
696 .info = snd_at73c213_line_capture_volume_info,
697 .get = snd_at73c213_stereo_get,
698 .put = snd_at73c213_stereo_put,
699 .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
700 | (0x1f << 24) | (1 << 22),
701 },
702 AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
703 };
704
705 static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip)
706 {
707 struct snd_card *card;
708 int errval, idx;
709
710 if (chip == NULL || chip->pcm == NULL)
711 return -EINVAL;
712
713 card = chip->card;
714
715 strcpy(card->mixername, chip->pcm->name);
716
717 for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
718 errval = snd_ctl_add(card,
719 snd_ctl_new1(&snd_at73c213_controls[idx],
720 chip));
721 if (errval < 0)
722 goto cleanup;
723 }
724
725 return 0;
726
727 cleanup:
728 for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
729 struct snd_kcontrol *kctl;
730 kctl = snd_ctl_find_numid(card, idx);
731 if (kctl)
732 snd_ctl_remove(card, kctl);
733 }
734 return errval;
735 }
736
737 /*
738 * Device functions
739 */
740 static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
741 {
742 /*
743 * Continuous clock output.
744 * Starts on falling TF.
745 * Delay 1 cycle (1 bit).
746 * Periode is 16 bit (16 - 1).
747 */
748 ssc_writel(chip->ssc->regs, TCMR,
749 SSC_BF(TCMR_CKO, 1)
750 | SSC_BF(TCMR_START, 4)
751 | SSC_BF(TCMR_STTDLY, 1)
752 | SSC_BF(TCMR_PERIOD, 16 - 1));
753 /*
754 * Data length is 16 bit (16 - 1).
755 * Transmit MSB first.
756 * Transmit 2 words each transfer.
757 * Frame sync length is 16 bit (16 - 1).
758 * Frame starts on negative pulse.
759 */
760 ssc_writel(chip->ssc->regs, TFMR,
761 SSC_BF(TFMR_DATLEN, 16 - 1)
762 | SSC_BIT(TFMR_MSBF)
763 | SSC_BF(TFMR_DATNB, 1)
764 | SSC_BF(TFMR_FSLEN, 16 - 1)
765 | SSC_BF(TFMR_FSOS, 1));
766
767 return 0;
768 }
769
770 static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
771 {
772 int retval;
773 unsigned char dac_ctrl = 0;
774
775 retval = snd_at73c213_set_bitrate(chip);
776 if (retval)
777 goto out;
778
779 /* Enable DAC master clock. */
780 clk_enable(chip->board->dac_clk);
781
782 /* Initialize at73c213 on SPI bus. */
783 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
784 if (retval)
785 goto out_clk;
786 msleep(1);
787 retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
788 if (retval)
789 goto out_clk;
790
791 /* Precharge everything. */
792 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
793 if (retval)
794 goto out_clk;
795 retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
796 if (retval)
797 goto out_clk;
798 retval = snd_at73c213_write_reg(chip, DAC_CTRL,
799 (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
800 if (retval)
801 goto out_clk;
802
803 msleep(50);
804
805 /* Stop precharging PA. */
806 retval = snd_at73c213_write_reg(chip, PA_CTRL,
807 (1<<PA_CTRL_APALP) | 0x0f);
808 if (retval)
809 goto out_clk;
810
811 msleep(450);
812
813 /* Stop precharging DAC, turn on master power. */
814 retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
815 if (retval)
816 goto out_clk;
817
818 msleep(1);
819
820 /* Turn on DAC. */
821 dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
822 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
823
824 retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
825 if (retval)
826 goto out_clk;
827
828 /* Mute sound. */
829 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
830 if (retval)
831 goto out_clk;
832 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
833 if (retval)
834 goto out_clk;
835 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
836 if (retval)
837 goto out_clk;
838 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
839 if (retval)
840 goto out_clk;
841 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
842 if (retval)
843 goto out_clk;
844 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
845 if (retval)
846 goto out_clk;
847 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
848 if (retval)
849 goto out_clk;
850
851 /* Enable I2S device, i.e. clock output. */
852 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
853
854 goto out;
855
856 out_clk:
857 clk_disable(chip->board->dac_clk);
858 out:
859 return retval;
860 }
861
862 static int snd_at73c213_dev_free(struct snd_device *device)
863 {
864 struct snd_at73c213 *chip = device->device_data;
865
866 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
867 if (chip->irq >= 0) {
868 free_irq(chip->irq, chip);
869 chip->irq = -1;
870 }
871
872 return 0;
873 }
874
875 static int __devinit snd_at73c213_dev_init(struct snd_card *card,
876 struct spi_device *spi)
877 {
878 static struct snd_device_ops ops = {
879 .dev_free = snd_at73c213_dev_free,
880 };
881 struct snd_at73c213 *chip = get_chip(card);
882 int irq, retval;
883
884 irq = chip->ssc->irq;
885 if (irq < 0)
886 return irq;
887
888 spin_lock_init(&chip->lock);
889 mutex_init(&chip->mixer_lock);
890 chip->card = card;
891 chip->irq = -1;
892
893 retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
894 if (retval) {
895 dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
896 goto out;
897 }
898 chip->irq = irq;
899
900 memcpy(&chip->reg_image, &snd_at73c213_original_image,
901 sizeof(snd_at73c213_original_image));
902
903 retval = snd_at73c213_ssc_init(chip);
904 if (retval)
905 goto out_irq;
906
907 retval = snd_at73c213_chip_init(chip);
908 if (retval)
909 goto out_irq;
910
911 retval = snd_at73c213_pcm_new(chip, 0);
912 if (retval)
913 goto out_irq;
914
915 retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
916 if (retval)
917 goto out_irq;
918
919 retval = snd_at73c213_mixer(chip);
920 if (retval)
921 goto out_snd_dev;
922
923 snd_card_set_dev(card, &spi->dev);
924
925 goto out;
926
927 out_snd_dev:
928 snd_device_free(card, chip);
929 out_irq:
930 free_irq(chip->irq, chip);
931 chip->irq = -1;
932 out:
933 return retval;
934 }
935
936 static int snd_at73c213_probe(struct spi_device *spi)
937 {
938 struct snd_card *card;
939 struct snd_at73c213 *chip;
940 struct at73c213_board_info *board;
941 int retval;
942 char id[16];
943
944 board = spi->dev.platform_data;
945 if (!board) {
946 dev_dbg(&spi->dev, "no platform_data\n");
947 return -ENXIO;
948 }
949
950 if (!board->dac_clk) {
951 dev_dbg(&spi->dev, "no DAC clk\n");
952 return -ENXIO;
953 }
954
955 if (IS_ERR(board->dac_clk)) {
956 dev_dbg(&spi->dev, "no DAC clk\n");
957 return PTR_ERR(board->dac_clk);
958 }
959
960 retval = -ENOMEM;
961
962 /* Allocate "card" using some unused identifiers. */
963 snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
964 card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213));
965 if (!card)
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
996 out_ssc:
997 ssc_free(chip->ssc);
998 out_card:
999 snd_card_free(card);
1000 out:
1001 return retval;
1002 }
1003
1004 static int __devexit 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 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1012
1013 /* Mute sound. */
1014 retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
1015 if (retval)
1016 goto out;
1017 retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
1018 if (retval)
1019 goto out;
1020 retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
1021 if (retval)
1022 goto out;
1023 retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
1024 if (retval)
1025 goto out;
1026 retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
1027 if (retval)
1028 goto out;
1029 retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
1030 if (retval)
1031 goto out;
1032 retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
1033 if (retval)
1034 goto out;
1035
1036 /* Turn off PA. */
1037 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1038 chip->reg_image[PA_CTRL] | 0x0f);
1039 if (retval)
1040 goto out;
1041 msleep(10);
1042 retval = snd_at73c213_write_reg(chip, PA_CTRL,
1043 (1 << PA_CTRL_APALP) | 0x0f);
1044 if (retval)
1045 goto out;
1046
1047 /* Turn off external DAC. */
1048 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
1049 if (retval)
1050 goto out;
1051 msleep(2);
1052 retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
1053 if (retval)
1054 goto out;
1055
1056 /* Turn off master power. */
1057 retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
1058 if (retval)
1059 goto out;
1060
1061 out:
1062 /* Stop DAC master clock. */
1063 clk_disable(chip->board->dac_clk);
1064
1065 ssc_free(chip->ssc);
1066 snd_card_free(card);
1067 dev_set_drvdata(&spi->dev, NULL);
1068
1069 return 0;
1070 }
1071
1072 #ifdef CONFIG_PM
1073 static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg)
1074 {
1075 struct snd_card *card = dev_get_drvdata(&spi->dev);
1076 struct snd_at73c213 *chip = card->private_data;
1077
1078 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
1079 clk_disable(chip->board->dac_clk);
1080
1081 return 0;
1082 }
1083
1084 static int snd_at73c213_resume(struct spi_device *spi)
1085 {
1086 struct snd_card *card = dev_get_drvdata(&spi->dev);
1087 struct snd_at73c213 *chip = card->private_data;
1088
1089 clk_enable(chip->board->dac_clk);
1090 ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
1091
1092 return 0;
1093 }
1094 #else
1095 #define snd_at73c213_suspend NULL
1096 #define snd_at73c213_resume NULL
1097 #endif
1098
1099 static struct spi_driver at73c213_driver = {
1100 .driver = {
1101 .name = "at73c213",
1102 },
1103 .probe = snd_at73c213_probe,
1104 .suspend = snd_at73c213_suspend,
1105 .resume = snd_at73c213_resume,
1106 .remove = __devexit_p(snd_at73c213_remove),
1107 };
1108
1109 static int __init at73c213_init(void)
1110 {
1111 return spi_register_driver(&at73c213_driver);
1112 }
1113 module_init(at73c213_init);
1114
1115 static void __exit at73c213_exit(void)
1116 {
1117 spi_unregister_driver(&at73c213_driver);
1118 }
1119 module_exit(at73c213_exit);
1120
1121 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
1122 MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
1123 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards