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eafe5708 HCE |
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> | |
f488d9fc | 21 | #include <linux/mutex.h> |
eafe5708 HCE |
22 | #include <linux/platform_device.h> |
23 | #include <linux/io.h> | |
24 | ||
eafe5708 HCE |
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]; | |
f488d9fc | 79 | /* Protect SSC registers against concurrent access. */ |
eafe5708 | 80 | spinlock_t lock; |
f488d9fc HCE |
81 | /* Protect mixer registers against concurrent access. */ |
82 | struct mutex mixer_lock; | |
eafe5708 HCE |
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. */ | |
4a295ca4 | 121 | .channels_min = 1, |
eafe5708 HCE |
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); | |
c67582b1 AN |
136 | unsigned long dac_rate_new, ssc_div; |
137 | int status; | |
eafe5708 HCE |
138 | unsigned long ssc_div_max, ssc_div_min; |
139 | int max_tries; | |
140 | ||
141 | /* | |
142 | * We connect two clocks here, picking divisors so the I2S clocks | |
143 | * out data at the same rate the DAC clocks it in ... and as close | |
144 | * as practical to the desired target rate. | |
145 | * | |
146 | * The DAC master clock (MCLK) is programmable, and is either 256 | |
147 | * or (not here) 384 times the I2S output clock (BCLK). | |
148 | */ | |
149 | ||
150 | /* SSC clock / (bitrate * stereo * 16-bit). */ | |
151 | ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); | |
152 | ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); | |
153 | ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); | |
154 | max_tries = (ssc_div_max - ssc_div_min) / 2; | |
155 | ||
156 | if (max_tries < 1) | |
157 | max_tries = 1; | |
158 | ||
159 | /* ssc_div must be a power of 2. */ | |
160 | ssc_div = (ssc_div + 1) & ~1UL; | |
161 | ||
162 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { | |
163 | ssc_div -= 2; | |
164 | if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) | |
165 | return -ENXIO; | |
166 | } | |
167 | ||
168 | /* Search for a possible bitrate. */ | |
169 | do { | |
170 | /* SSC clock / (ssc divider * 16-bit * stereo). */ | |
171 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) | |
172 | return -ENXIO; | |
173 | ||
174 | /* 256 / (2 * 16) = 8 */ | |
175 | dac_rate_new = 8 * (ssc_rate / ssc_div); | |
176 | ||
177 | status = clk_round_rate(chip->board->dac_clk, dac_rate_new); | |
178 | if (status < 0) | |
179 | return status; | |
180 | ||
181 | /* Ignore difference smaller than 256 Hz. */ | |
182 | if ((status/256) == (dac_rate_new/256)) | |
183 | goto set_rate; | |
184 | ||
185 | ssc_div += 2; | |
186 | } while (--max_tries); | |
187 | ||
188 | /* Not able to find a valid bitrate. */ | |
189 | return -ENXIO; | |
190 | ||
191 | set_rate: | |
192 | status = clk_set_rate(chip->board->dac_clk, status); | |
193 | if (status < 0) | |
194 | return status; | |
195 | ||
196 | /* Set divider in SSC device. */ | |
197 | ssc_writel(chip->ssc->regs, CMR, ssc_div/2); | |
198 | ||
199 | /* SSC clock / (ssc divider * 16-bit * stereo). */ | |
200 | chip->bitrate = ssc_rate / (ssc_div * 16 * 2); | |
201 | ||
202 | dev_info(&chip->spi->dev, | |
203 | "at73c213: supported bitrate is %lu (%lu divider)\n", | |
204 | chip->bitrate, ssc_div); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) | |
210 | { | |
211 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
212 | struct snd_pcm_runtime *runtime = substream->runtime; | |
213 | ||
214 | snd_at73c213_playback_hw.rate_min = chip->bitrate; | |
215 | snd_at73c213_playback_hw.rate_max = chip->bitrate; | |
216 | runtime->hw = snd_at73c213_playback_hw; | |
217 | chip->substream = substream; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) | |
223 | { | |
224 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
225 | chip->substream = NULL; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, | |
230 | struct snd_pcm_hw_params *hw_params) | |
231 | { | |
4a295ca4 AN |
232 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); |
233 | int channels = params_channels(hw_params); | |
234 | int val; | |
235 | ||
236 | val = ssc_readl(chip->ssc->regs, TFMR); | |
237 | val = SSC_BFINS(TFMR_DATNB, channels - 1, val); | |
238 | ssc_writel(chip->ssc->regs, TFMR, val); | |
239 | ||
eafe5708 HCE |
240 | return snd_pcm_lib_malloc_pages(substream, |
241 | params_buffer_bytes(hw_params)); | |
242 | } | |
243 | ||
244 | static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream) | |
245 | { | |
246 | return snd_pcm_lib_free_pages(substream); | |
247 | } | |
248 | ||
249 | static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) | |
250 | { | |
251 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
252 | struct snd_pcm_runtime *runtime = substream->runtime; | |
253 | int block_size; | |
254 | ||
255 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
256 | ||
257 | chip->period = 0; | |
258 | ||
259 | ssc_writel(chip->ssc->regs, PDC_TPR, | |
260 | (long)runtime->dma_addr); | |
4a295ca4 AN |
261 | ssc_writel(chip->ssc->regs, PDC_TCR, |
262 | runtime->period_size * runtime->channels); | |
eafe5708 HCE |
263 | ssc_writel(chip->ssc->regs, PDC_TNPR, |
264 | (long)runtime->dma_addr + block_size); | |
4a295ca4 AN |
265 | ssc_writel(chip->ssc->regs, PDC_TNCR, |
266 | runtime->period_size * runtime->channels); | |
eafe5708 HCE |
267 | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, | |
272 | int cmd) | |
273 | { | |
274 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
275 | int retval = 0; | |
276 | ||
277 | spin_lock(&chip->lock); | |
278 | ||
279 | switch (cmd) { | |
280 | case SNDRV_PCM_TRIGGER_START: | |
281 | ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); | |
282 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); | |
283 | break; | |
284 | case SNDRV_PCM_TRIGGER_STOP: | |
285 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); | |
286 | ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); | |
287 | break; | |
288 | default: | |
289 | dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); | |
290 | retval = -EINVAL; | |
291 | break; | |
292 | } | |
293 | ||
294 | spin_unlock(&chip->lock); | |
295 | ||
296 | return retval; | |
297 | } | |
298 | ||
299 | static snd_pcm_uframes_t | |
300 | snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) | |
301 | { | |
302 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
303 | struct snd_pcm_runtime *runtime = substream->runtime; | |
304 | snd_pcm_uframes_t pos; | |
305 | unsigned long bytes; | |
306 | ||
307 | bytes = ssc_readl(chip->ssc->regs, PDC_TPR) | |
308 | - (unsigned long)runtime->dma_addr; | |
309 | ||
310 | pos = bytes_to_frames(runtime, bytes); | |
311 | if (pos >= runtime->buffer_size) | |
312 | pos -= runtime->buffer_size; | |
313 | ||
314 | return pos; | |
315 | } | |
316 | ||
317 | static struct snd_pcm_ops at73c213_playback_ops = { | |
318 | .open = snd_at73c213_pcm_open, | |
319 | .close = snd_at73c213_pcm_close, | |
320 | .ioctl = snd_pcm_lib_ioctl, | |
321 | .hw_params = snd_at73c213_pcm_hw_params, | |
322 | .hw_free = snd_at73c213_pcm_hw_free, | |
323 | .prepare = snd_at73c213_pcm_prepare, | |
324 | .trigger = snd_at73c213_pcm_trigger, | |
325 | .pointer = snd_at73c213_pcm_pointer, | |
326 | }; | |
327 | ||
328 | static void snd_at73c213_pcm_free(struct snd_pcm *pcm) | |
329 | { | |
330 | struct snd_at73c213 *chip = snd_pcm_chip(pcm); | |
331 | if (chip->pcm) { | |
332 | snd_pcm_lib_preallocate_free_for_all(chip->pcm); | |
333 | chip->pcm = NULL; | |
334 | } | |
335 | } | |
336 | ||
337 | static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) | |
338 | { | |
339 | struct snd_pcm *pcm; | |
340 | int retval; | |
341 | ||
342 | retval = snd_pcm_new(chip->card, chip->card->shortname, | |
343 | device, 1, 0, &pcm); | |
344 | if (retval < 0) | |
345 | goto out; | |
346 | ||
347 | pcm->private_data = chip; | |
348 | pcm->private_free = snd_at73c213_pcm_free; | |
349 | pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; | |
350 | strcpy(pcm->name, "at73c213"); | |
351 | chip->pcm = pcm; | |
352 | ||
353 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); | |
354 | ||
355 | retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm, | |
356 | SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, | |
357 | 64 * 1024, 64 * 1024); | |
358 | out: | |
359 | return retval; | |
360 | } | |
361 | ||
362 | static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) | |
363 | { | |
364 | struct snd_at73c213 *chip = dev_id; | |
365 | struct snd_pcm_runtime *runtime = chip->substream->runtime; | |
366 | u32 status; | |
367 | int offset; | |
368 | int block_size; | |
369 | int next_period; | |
370 | int retval = IRQ_NONE; | |
371 | ||
372 | spin_lock(&chip->lock); | |
373 | ||
374 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
375 | status = ssc_readl(chip->ssc->regs, IMR); | |
376 | ||
377 | if (status & SSC_BIT(IMR_ENDTX)) { | |
378 | chip->period++; | |
379 | if (chip->period == runtime->periods) | |
380 | chip->period = 0; | |
381 | next_period = chip->period + 1; | |
382 | if (next_period == runtime->periods) | |
383 | next_period = 0; | |
384 | ||
385 | offset = block_size * next_period; | |
386 | ||
387 | ssc_writel(chip->ssc->regs, PDC_TNPR, | |
388 | (long)runtime->dma_addr + offset); | |
4a295ca4 AN |
389 | ssc_writel(chip->ssc->regs, PDC_TNCR, |
390 | runtime->period_size * runtime->channels); | |
eafe5708 HCE |
391 | retval = IRQ_HANDLED; |
392 | } | |
393 | ||
394 | ssc_readl(chip->ssc->regs, IMR); | |
395 | spin_unlock(&chip->lock); | |
396 | ||
397 | if (status & SSC_BIT(IMR_ENDTX)) | |
398 | snd_pcm_period_elapsed(chip->substream); | |
399 | ||
400 | return retval; | |
401 | } | |
402 | ||
403 | /* | |
404 | * Mixer functions. | |
405 | */ | |
406 | static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, | |
407 | struct snd_ctl_elem_value *ucontrol) | |
408 | { | |
409 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
410 | int reg = kcontrol->private_value & 0xff; | |
411 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
412 | int mask = (kcontrol->private_value >> 16) & 0xff; | |
413 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
414 | ||
f488d9fc | 415 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
416 | |
417 | ucontrol->value.integer.value[0] = | |
418 | (chip->reg_image[reg] >> shift) & mask; | |
419 | ||
420 | if (invert) | |
421 | ucontrol->value.integer.value[0] = | |
422 | mask - ucontrol->value.integer.value[0]; | |
423 | ||
f488d9fc | 424 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
425 | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, | |
430 | struct snd_ctl_elem_value *ucontrol) | |
431 | { | |
432 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
433 | int reg = kcontrol->private_value & 0xff; | |
434 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
435 | int mask = (kcontrol->private_value >> 16) & 0xff; | |
436 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
437 | int change, retval; | |
438 | unsigned short val; | |
439 | ||
440 | val = (ucontrol->value.integer.value[0] & mask); | |
441 | if (invert) | |
442 | val = mask - val; | |
443 | val <<= shift; | |
444 | ||
f488d9fc | 445 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
446 | |
447 | val = (chip->reg_image[reg] & ~(mask << shift)) | val; | |
448 | change = val != chip->reg_image[reg]; | |
449 | retval = snd_at73c213_write_reg(chip, reg, val); | |
450 | ||
f488d9fc | 451 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
452 | |
453 | if (retval) | |
454 | return retval; | |
455 | ||
456 | return change; | |
457 | } | |
458 | ||
459 | static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, | |
460 | struct snd_ctl_elem_info *uinfo) | |
461 | { | |
462 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
463 | ||
464 | if (mask == 1) | |
465 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
466 | else | |
467 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
468 | ||
469 | uinfo->count = 2; | |
470 | uinfo->value.integer.min = 0; | |
471 | uinfo->value.integer.max = mask; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, | |
477 | struct snd_ctl_elem_value *ucontrol) | |
478 | { | |
479 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
480 | int left_reg = kcontrol->private_value & 0xff; | |
481 | int right_reg = (kcontrol->private_value >> 8) & 0xff; | |
482 | int shift_left = (kcontrol->private_value >> 16) & 0x07; | |
483 | int shift_right = (kcontrol->private_value >> 19) & 0x07; | |
484 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
485 | int invert = (kcontrol->private_value >> 22) & 1; | |
486 | ||
f488d9fc | 487 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
488 | |
489 | ucontrol->value.integer.value[0] = | |
490 | (chip->reg_image[left_reg] >> shift_left) & mask; | |
491 | ucontrol->value.integer.value[1] = | |
492 | (chip->reg_image[right_reg] >> shift_right) & mask; | |
493 | ||
494 | if (invert) { | |
495 | ucontrol->value.integer.value[0] = | |
496 | mask - ucontrol->value.integer.value[0]; | |
497 | ucontrol->value.integer.value[1] = | |
498 | mask - ucontrol->value.integer.value[1]; | |
499 | } | |
500 | ||
f488d9fc | 501 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
502 | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, | |
507 | struct snd_ctl_elem_value *ucontrol) | |
508 | { | |
509 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
510 | int left_reg = kcontrol->private_value & 0xff; | |
511 | int right_reg = (kcontrol->private_value >> 8) & 0xff; | |
512 | int shift_left = (kcontrol->private_value >> 16) & 0x07; | |
513 | int shift_right = (kcontrol->private_value >> 19) & 0x07; | |
514 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
515 | int invert = (kcontrol->private_value >> 22) & 1; | |
516 | int change, retval; | |
517 | unsigned short val1, val2; | |
518 | ||
519 | val1 = ucontrol->value.integer.value[0] & mask; | |
520 | val2 = ucontrol->value.integer.value[1] & mask; | |
521 | if (invert) { | |
522 | val1 = mask - val1; | |
523 | val2 = mask - val2; | |
524 | } | |
525 | val1 <<= shift_left; | |
526 | val2 <<= shift_right; | |
527 | ||
f488d9fc | 528 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
529 | |
530 | val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; | |
531 | val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; | |
532 | change = val1 != chip->reg_image[left_reg] | |
533 | || val2 != chip->reg_image[right_reg]; | |
534 | retval = snd_at73c213_write_reg(chip, left_reg, val1); | |
535 | if (retval) { | |
f488d9fc | 536 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
537 | goto out; |
538 | } | |
539 | retval = snd_at73c213_write_reg(chip, right_reg, val2); | |
540 | if (retval) { | |
f488d9fc | 541 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
542 | goto out; |
543 | } | |
544 | ||
f488d9fc | 545 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
546 | |
547 | return change; | |
548 | ||
549 | out: | |
550 | return retval; | |
551 | } | |
552 | ||
4b6c26af | 553 | #define snd_at73c213_mono_switch_info snd_ctl_boolean_mono_info |
eafe5708 HCE |
554 | |
555 | static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol, | |
556 | struct snd_ctl_elem_value *ucontrol) | |
557 | { | |
558 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
559 | int reg = kcontrol->private_value & 0xff; | |
560 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
561 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
562 | ||
f488d9fc | 563 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
564 | |
565 | ucontrol->value.integer.value[0] = | |
566 | (chip->reg_image[reg] >> shift) & 0x01; | |
567 | ||
568 | if (invert) | |
569 | ucontrol->value.integer.value[0] = | |
570 | 0x01 - ucontrol->value.integer.value[0]; | |
571 | ||
f488d9fc | 572 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
573 | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol, | |
578 | struct snd_ctl_elem_value *ucontrol) | |
579 | { | |
580 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
581 | int reg = kcontrol->private_value & 0xff; | |
582 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
583 | int mask = (kcontrol->private_value >> 16) & 0xff; | |
584 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
585 | int change, retval; | |
586 | unsigned short val; | |
587 | ||
588 | if (ucontrol->value.integer.value[0]) | |
589 | val = mask; | |
590 | else | |
591 | val = 0; | |
592 | ||
593 | if (invert) | |
594 | val = mask - val; | |
595 | val <<= shift; | |
596 | ||
f488d9fc | 597 | mutex_lock(&chip->mixer_lock); |
eafe5708 HCE |
598 | |
599 | val |= (chip->reg_image[reg] & ~(mask << shift)); | |
600 | change = val != chip->reg_image[reg]; | |
601 | ||
602 | retval = snd_at73c213_write_reg(chip, reg, val); | |
603 | ||
f488d9fc | 604 | mutex_unlock(&chip->mixer_lock); |
eafe5708 HCE |
605 | |
606 | if (retval) | |
607 | return retval; | |
608 | ||
609 | return change; | |
610 | } | |
611 | ||
612 | static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol, | |
613 | struct snd_ctl_elem_info *uinfo) | |
614 | { | |
615 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
616 | uinfo->count = 1; | |
617 | uinfo->value.integer.min = 0; | |
618 | uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1; | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | static int snd_at73c213_line_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 = 2; | |
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 | static int snd_at73c213_aux_capture_volume_info( | |
637 | struct snd_kcontrol *kcontrol, | |
638 | struct snd_ctl_elem_info *uinfo) | |
639 | { | |
640 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
641 | uinfo->count = 1; | |
642 | /* When inverted will give values 0x10001 => 0. */ | |
643 | uinfo->value.integer.min = 14; | |
644 | uinfo->value.integer.max = 31; | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | #define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert) \ | |
650 | { \ | |
651 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ | |
652 | .name = xname, \ | |
653 | .index = xindex, \ | |
654 | .info = snd_at73c213_mono_switch_info, \ | |
655 | .get = snd_at73c213_mono_switch_get, \ | |
656 | .put = snd_at73c213_mono_switch_put, \ | |
657 | .private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \ | |
658 | } | |
659 | ||
660 | #define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \ | |
661 | { \ | |
662 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \ | |
663 | .name = xname, \ | |
664 | .index = xindex, \ | |
665 | .info = snd_at73c213_stereo_info, \ | |
666 | .get = snd_at73c213_stereo_get, \ | |
667 | .put = snd_at73c213_stereo_put, \ | |
668 | .private_value = (left_reg | (right_reg << 8) \ | |
669 | | (shift_left << 16) | (shift_right << 19) \ | |
670 | | (mask << 24) | (invert << 22)) \ | |
671 | } | |
672 | ||
673 | static struct snd_kcontrol_new snd_at73c213_controls[] __devinitdata = { | |
674 | AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1), | |
675 | AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1), | |
676 | AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1), | |
677 | AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1), | |
678 | AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV, | |
679 | 0x01, 0), | |
680 | { | |
681 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
682 | .name = "PA Playback Volume", | |
683 | .index = 0, | |
684 | .info = snd_at73c213_pa_volume_info, | |
685 | .get = snd_at73c213_mono_get, | |
686 | .put = snd_at73c213_mono_put, | |
687 | .private_value = PA_CTRL | (PA_CTRL_APAGAIN << 8) | \ | |
688 | (0x0f << 16) | (1 << 24), | |
689 | }, | |
690 | AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP, | |
691 | 0x01, 1), | |
692 | AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0), | |
693 | { | |
694 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
695 | .name = "Aux Capture Volume", | |
696 | .index = 0, | |
697 | .info = snd_at73c213_aux_capture_volume_info, | |
698 | .get = snd_at73c213_mono_get, | |
699 | .put = snd_at73c213_mono_put, | |
700 | .private_value = DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24), | |
701 | }, | |
702 | AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN, | |
703 | 0x01, 0), | |
704 | { | |
705 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
706 | .name = "Line Capture Volume", | |
707 | .index = 0, | |
708 | .info = snd_at73c213_line_capture_volume_info, | |
709 | .get = snd_at73c213_stereo_get, | |
710 | .put = snd_at73c213_stereo_put, | |
711 | .private_value = DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19) | |
712 | | (0x1f << 24) | (1 << 22), | |
713 | }, | |
714 | AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0), | |
715 | }; | |
716 | ||
717 | static int __devinit snd_at73c213_mixer(struct snd_at73c213 *chip) | |
718 | { | |
719 | struct snd_card *card; | |
720 | int errval, idx; | |
721 | ||
722 | if (chip == NULL || chip->pcm == NULL) | |
723 | return -EINVAL; | |
724 | ||
725 | card = chip->card; | |
726 | ||
727 | strcpy(card->mixername, chip->pcm->name); | |
728 | ||
729 | for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) { | |
730 | errval = snd_ctl_add(card, | |
731 | snd_ctl_new1(&snd_at73c213_controls[idx], | |
732 | chip)); | |
733 | if (errval < 0) | |
734 | goto cleanup; | |
735 | } | |
736 | ||
737 | return 0; | |
738 | ||
739 | cleanup: | |
740 | for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) { | |
741 | struct snd_kcontrol *kctl; | |
742 | kctl = snd_ctl_find_numid(card, idx); | |
743 | if (kctl) | |
744 | snd_ctl_remove(card, kctl); | |
745 | } | |
746 | return errval; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Device functions | |
751 | */ | |
2eef1258 | 752 | static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip) |
eafe5708 HCE |
753 | { |
754 | /* | |
755 | * Continuous clock output. | |
756 | * Starts on falling TF. | |
757 | * Delay 1 cycle (1 bit). | |
758 | * Periode is 16 bit (16 - 1). | |
759 | */ | |
760 | ssc_writel(chip->ssc->regs, TCMR, | |
761 | SSC_BF(TCMR_CKO, 1) | |
762 | | SSC_BF(TCMR_START, 4) | |
763 | | SSC_BF(TCMR_STTDLY, 1) | |
764 | | SSC_BF(TCMR_PERIOD, 16 - 1)); | |
765 | /* | |
766 | * Data length is 16 bit (16 - 1). | |
767 | * Transmit MSB first. | |
768 | * Transmit 2 words each transfer. | |
769 | * Frame sync length is 16 bit (16 - 1). | |
770 | * Frame starts on negative pulse. | |
771 | */ | |
772 | ssc_writel(chip->ssc->regs, TFMR, | |
773 | SSC_BF(TFMR_DATLEN, 16 - 1) | |
774 | | SSC_BIT(TFMR_MSBF) | |
775 | | SSC_BF(TFMR_DATNB, 1) | |
776 | | SSC_BF(TFMR_FSLEN, 16 - 1) | |
777 | | SSC_BF(TFMR_FSOS, 1)); | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
2eef1258 | 782 | static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip) |
eafe5708 HCE |
783 | { |
784 | int retval; | |
785 | unsigned char dac_ctrl = 0; | |
786 | ||
787 | retval = snd_at73c213_set_bitrate(chip); | |
788 | if (retval) | |
789 | goto out; | |
790 | ||
791 | /* Enable DAC master clock. */ | |
792 | clk_enable(chip->board->dac_clk); | |
793 | ||
794 | /* Initialize at73c213 on SPI bus. */ | |
795 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04); | |
796 | if (retval) | |
797 | goto out_clk; | |
798 | msleep(1); | |
799 | retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03); | |
800 | if (retval) | |
801 | goto out_clk; | |
802 | ||
803 | /* Precharge everything. */ | |
804 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff); | |
805 | if (retval) | |
806 | goto out_clk; | |
807 | retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH)); | |
808 | if (retval) | |
809 | goto out_clk; | |
810 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, | |
811 | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR)); | |
812 | if (retval) | |
813 | goto out_clk; | |
814 | ||
815 | msleep(50); | |
816 | ||
817 | /* Stop precharging PA. */ | |
818 | retval = snd_at73c213_write_reg(chip, PA_CTRL, | |
819 | (1<<PA_CTRL_APALP) | 0x0f); | |
820 | if (retval) | |
821 | goto out_clk; | |
822 | ||
823 | msleep(450); | |
824 | ||
825 | /* Stop precharging DAC, turn on master power. */ | |
826 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR)); | |
827 | if (retval) | |
828 | goto out_clk; | |
829 | ||
830 | msleep(1); | |
831 | ||
832 | /* Turn on DAC. */ | |
833 | dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR) | |
834 | | (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR); | |
835 | ||
836 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl); | |
837 | if (retval) | |
838 | goto out_clk; | |
839 | ||
840 | /* Mute sound. */ | |
841 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); | |
842 | if (retval) | |
843 | goto out_clk; | |
844 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); | |
845 | if (retval) | |
846 | goto out_clk; | |
847 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); | |
848 | if (retval) | |
849 | goto out_clk; | |
850 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); | |
851 | if (retval) | |
852 | goto out_clk; | |
853 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); | |
854 | if (retval) | |
855 | goto out_clk; | |
856 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); | |
857 | if (retval) | |
858 | goto out_clk; | |
859 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); | |
860 | if (retval) | |
861 | goto out_clk; | |
862 | ||
863 | /* Enable I2S device, i.e. clock output. */ | |
864 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); | |
865 | ||
866 | goto out; | |
867 | ||
868 | out_clk: | |
869 | clk_disable(chip->board->dac_clk); | |
870 | out: | |
871 | return retval; | |
872 | } | |
873 | ||
874 | static int snd_at73c213_dev_free(struct snd_device *device) | |
875 | { | |
876 | struct snd_at73c213 *chip = device->device_data; | |
877 | ||
878 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); | |
879 | if (chip->irq >= 0) { | |
880 | free_irq(chip->irq, chip); | |
881 | chip->irq = -1; | |
882 | } | |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
887 | static int __devinit snd_at73c213_dev_init(struct snd_card *card, | |
888 | struct spi_device *spi) | |
889 | { | |
890 | static struct snd_device_ops ops = { | |
891 | .dev_free = snd_at73c213_dev_free, | |
892 | }; | |
893 | struct snd_at73c213 *chip = get_chip(card); | |
894 | int irq, retval; | |
895 | ||
896 | irq = chip->ssc->irq; | |
897 | if (irq < 0) | |
898 | return irq; | |
899 | ||
900 | spin_lock_init(&chip->lock); | |
f488d9fc | 901 | mutex_init(&chip->mixer_lock); |
eafe5708 HCE |
902 | chip->card = card; |
903 | chip->irq = -1; | |
904 | ||
905 | retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); | |
906 | if (retval) { | |
907 | dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); | |
908 | goto out; | |
909 | } | |
910 | chip->irq = irq; | |
911 | ||
912 | memcpy(&chip->reg_image, &snd_at73c213_original_image, | |
913 | sizeof(snd_at73c213_original_image)); | |
914 | ||
915 | retval = snd_at73c213_ssc_init(chip); | |
916 | if (retval) | |
917 | goto out_irq; | |
918 | ||
919 | retval = snd_at73c213_chip_init(chip); | |
920 | if (retval) | |
921 | goto out_irq; | |
922 | ||
923 | retval = snd_at73c213_pcm_new(chip, 0); | |
924 | if (retval) | |
925 | goto out_irq; | |
926 | ||
927 | retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); | |
928 | if (retval) | |
929 | goto out_irq; | |
930 | ||
931 | retval = snd_at73c213_mixer(chip); | |
932 | if (retval) | |
933 | goto out_snd_dev; | |
934 | ||
935 | snd_card_set_dev(card, &spi->dev); | |
936 | ||
937 | goto out; | |
938 | ||
939 | out_snd_dev: | |
940 | snd_device_free(card, chip); | |
941 | out_irq: | |
942 | free_irq(chip->irq, chip); | |
943 | chip->irq = -1; | |
944 | out: | |
945 | return retval; | |
946 | } | |
947 | ||
2eef1258 | 948 | static int __devinit snd_at73c213_probe(struct spi_device *spi) |
eafe5708 HCE |
949 | { |
950 | struct snd_card *card; | |
951 | struct snd_at73c213 *chip; | |
952 | struct at73c213_board_info *board; | |
953 | int retval; | |
954 | char id[16]; | |
955 | ||
956 | board = spi->dev.platform_data; | |
957 | if (!board) { | |
958 | dev_dbg(&spi->dev, "no platform_data\n"); | |
959 | return -ENXIO; | |
960 | } | |
961 | ||
962 | if (!board->dac_clk) { | |
963 | dev_dbg(&spi->dev, "no DAC clk\n"); | |
964 | return -ENXIO; | |
965 | } | |
966 | ||
967 | if (IS_ERR(board->dac_clk)) { | |
968 | dev_dbg(&spi->dev, "no DAC clk\n"); | |
969 | return PTR_ERR(board->dac_clk); | |
970 | } | |
971 | ||
972 | retval = -ENOMEM; | |
973 | ||
974 | /* Allocate "card" using some unused identifiers. */ | |
975 | snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); | |
976 | card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213)); | |
977 | if (!card) | |
978 | goto out; | |
979 | ||
980 | chip = card->private_data; | |
981 | chip->spi = spi; | |
982 | chip->board = board; | |
983 | ||
984 | chip->ssc = ssc_request(board->ssc_id); | |
985 | if (IS_ERR(chip->ssc)) { | |
986 | dev_dbg(&spi->dev, "could not get ssc%d device\n", | |
987 | board->ssc_id); | |
988 | retval = PTR_ERR(chip->ssc); | |
989 | goto out_card; | |
990 | } | |
991 | ||
992 | retval = snd_at73c213_dev_init(card, spi); | |
993 | if (retval) | |
994 | goto out_ssc; | |
995 | ||
996 | strcpy(card->driver, "at73c213"); | |
997 | strcpy(card->shortname, board->shortname); | |
998 | sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq); | |
999 | ||
1000 | retval = snd_card_register(card); | |
1001 | if (retval) | |
1002 | goto out_ssc; | |
1003 | ||
1004 | dev_set_drvdata(&spi->dev, card); | |
1005 | ||
1006 | goto out; | |
1007 | ||
1008 | out_ssc: | |
1009 | ssc_free(chip->ssc); | |
1010 | out_card: | |
1011 | snd_card_free(card); | |
1012 | out: | |
1013 | return retval; | |
1014 | } | |
1015 | ||
1016 | static int __devexit snd_at73c213_remove(struct spi_device *spi) | |
1017 | { | |
1018 | struct snd_card *card = dev_get_drvdata(&spi->dev); | |
1019 | struct snd_at73c213 *chip = card->private_data; | |
1020 | int retval; | |
1021 | ||
1022 | /* Stop playback. */ | |
1023 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); | |
1024 | ||
1025 | /* Mute sound. */ | |
1026 | retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f); | |
1027 | if (retval) | |
1028 | goto out; | |
1029 | retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f); | |
1030 | if (retval) | |
1031 | goto out; | |
1032 | retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f); | |
1033 | if (retval) | |
1034 | goto out; | |
1035 | retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f); | |
1036 | if (retval) | |
1037 | goto out; | |
1038 | retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11); | |
1039 | if (retval) | |
1040 | goto out; | |
1041 | retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11); | |
1042 | if (retval) | |
1043 | goto out; | |
1044 | retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11); | |
1045 | if (retval) | |
1046 | goto out; | |
1047 | ||
1048 | /* Turn off PA. */ | |
1049 | retval = snd_at73c213_write_reg(chip, PA_CTRL, | |
1050 | chip->reg_image[PA_CTRL] | 0x0f); | |
1051 | if (retval) | |
1052 | goto out; | |
1053 | msleep(10); | |
1054 | retval = snd_at73c213_write_reg(chip, PA_CTRL, | |
1055 | (1 << PA_CTRL_APALP) | 0x0f); | |
1056 | if (retval) | |
1057 | goto out; | |
1058 | ||
1059 | /* Turn off external DAC. */ | |
1060 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c); | |
1061 | if (retval) | |
1062 | goto out; | |
1063 | msleep(2); | |
1064 | retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00); | |
1065 | if (retval) | |
1066 | goto out; | |
1067 | ||
1068 | /* Turn off master power. */ | |
1069 | retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00); | |
1070 | if (retval) | |
1071 | goto out; | |
1072 | ||
1073 | out: | |
1074 | /* Stop DAC master clock. */ | |
1075 | clk_disable(chip->board->dac_clk); | |
1076 | ||
1077 | ssc_free(chip->ssc); | |
1078 | snd_card_free(card); | |
1079 | dev_set_drvdata(&spi->dev, NULL); | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
1084 | #ifdef CONFIG_PM | |
1085 | static int snd_at73c213_suspend(struct spi_device *spi, pm_message_t msg) | |
1086 | { | |
1087 | struct snd_card *card = dev_get_drvdata(&spi->dev); | |
1088 | struct snd_at73c213 *chip = card->private_data; | |
1089 | ||
1090 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS)); | |
1091 | clk_disable(chip->board->dac_clk); | |
1092 | ||
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | static int snd_at73c213_resume(struct spi_device *spi) | |
1097 | { | |
1098 | struct snd_card *card = dev_get_drvdata(&spi->dev); | |
1099 | struct snd_at73c213 *chip = card->private_data; | |
1100 | ||
1101 | clk_enable(chip->board->dac_clk); | |
1102 | ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN)); | |
1103 | ||
1104 | return 0; | |
1105 | } | |
1106 | #else | |
1107 | #define snd_at73c213_suspend NULL | |
1108 | #define snd_at73c213_resume NULL | |
1109 | #endif | |
1110 | ||
1111 | static struct spi_driver at73c213_driver = { | |
1112 | .driver = { | |
1113 | .name = "at73c213", | |
1114 | }, | |
1115 | .probe = snd_at73c213_probe, | |
1116 | .suspend = snd_at73c213_suspend, | |
1117 | .resume = snd_at73c213_resume, | |
1118 | .remove = __devexit_p(snd_at73c213_remove), | |
1119 | }; | |
1120 | ||
1121 | static int __init at73c213_init(void) | |
1122 | { | |
1123 | return spi_register_driver(&at73c213_driver); | |
1124 | } | |
1125 | module_init(at73c213_init); | |
1126 | ||
1127 | static void __exit at73c213_exit(void) | |
1128 | { | |
1129 | spi_unregister_driver(&at73c213_driver); | |
1130 | } | |
1131 | module_exit(at73c213_exit); | |
1132 | ||
1133 | MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>"); | |
1134 | MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); | |
1135 | MODULE_LICENSE("GPL"); |