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Commit | Line | Data |
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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> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/io.h> | |
23 | ||
24 | #include <sound/driver.h> | |
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 registers against concurrent access. */ | |
80 | spinlock_t lock; | |
81 | }; | |
82 | ||
83 | #define get_chip(card) ((struct snd_at73c213 *)card->private_data) | |
84 | ||
85 | static int | |
86 | snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val) | |
87 | { | |
88 | struct spi_message msg; | |
89 | struct spi_transfer msg_xfer = { | |
90 | .len = 2, | |
91 | .cs_change = 0, | |
92 | }; | |
93 | int retval; | |
94 | ||
95 | spi_message_init(&msg); | |
96 | ||
97 | chip->spi_wbuffer[0] = reg; | |
98 | chip->spi_wbuffer[1] = val; | |
99 | ||
100 | msg_xfer.tx_buf = chip->spi_wbuffer; | |
101 | msg_xfer.rx_buf = chip->spi_rbuffer; | |
102 | spi_message_add_tail(&msg_xfer, &msg); | |
103 | ||
104 | retval = spi_sync(chip->spi, &msg); | |
105 | ||
106 | if (!retval) | |
107 | chip->reg_image[reg] = val; | |
108 | ||
109 | return retval; | |
110 | } | |
111 | ||
112 | static struct snd_pcm_hardware snd_at73c213_playback_hw = { | |
113 | .info = SNDRV_PCM_INFO_INTERLEAVED | | |
114 | SNDRV_PCM_INFO_BLOCK_TRANSFER, | |
115 | .formats = SNDRV_PCM_FMTBIT_S16_BE, | |
116 | .rates = SNDRV_PCM_RATE_CONTINUOUS, | |
117 | .rate_min = 8000, /* Replaced by chip->bitrate later. */ | |
118 | .rate_max = 50000, /* Replaced by chip->bitrate later. */ | |
119 | .channels_min = 2, | |
120 | .channels_max = 2, | |
121 | .buffer_bytes_max = 64 * 1024 - 1, | |
122 | .period_bytes_min = 512, | |
123 | .period_bytes_max = 64 * 1024 - 1, | |
124 | .periods_min = 4, | |
125 | .periods_max = 1024, | |
126 | }; | |
127 | ||
128 | /* | |
129 | * Calculate and set bitrate and divisions. | |
130 | */ | |
131 | static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip) | |
132 | { | |
133 | unsigned long ssc_rate = clk_get_rate(chip->ssc->clk); | |
134 | unsigned long dac_rate_new, ssc_div, status; | |
135 | unsigned long ssc_div_max, ssc_div_min; | |
136 | int max_tries; | |
137 | ||
138 | /* | |
139 | * We connect two clocks here, picking divisors so the I2S clocks | |
140 | * out data at the same rate the DAC clocks it in ... and as close | |
141 | * as practical to the desired target rate. | |
142 | * | |
143 | * The DAC master clock (MCLK) is programmable, and is either 256 | |
144 | * or (not here) 384 times the I2S output clock (BCLK). | |
145 | */ | |
146 | ||
147 | /* SSC clock / (bitrate * stereo * 16-bit). */ | |
148 | ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16); | |
149 | ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16); | |
150 | ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16); | |
151 | max_tries = (ssc_div_max - ssc_div_min) / 2; | |
152 | ||
153 | if (max_tries < 1) | |
154 | max_tries = 1; | |
155 | ||
156 | /* ssc_div must be a power of 2. */ | |
157 | ssc_div = (ssc_div + 1) & ~1UL; | |
158 | ||
159 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) { | |
160 | ssc_div -= 2; | |
161 | if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX) | |
162 | return -ENXIO; | |
163 | } | |
164 | ||
165 | /* Search for a possible bitrate. */ | |
166 | do { | |
167 | /* SSC clock / (ssc divider * 16-bit * stereo). */ | |
168 | if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) | |
169 | return -ENXIO; | |
170 | ||
171 | /* 256 / (2 * 16) = 8 */ | |
172 | dac_rate_new = 8 * (ssc_rate / ssc_div); | |
173 | ||
174 | status = clk_round_rate(chip->board->dac_clk, dac_rate_new); | |
175 | if (status < 0) | |
176 | return status; | |
177 | ||
178 | /* Ignore difference smaller than 256 Hz. */ | |
179 | if ((status/256) == (dac_rate_new/256)) | |
180 | goto set_rate; | |
181 | ||
182 | ssc_div += 2; | |
183 | } while (--max_tries); | |
184 | ||
185 | /* Not able to find a valid bitrate. */ | |
186 | return -ENXIO; | |
187 | ||
188 | set_rate: | |
189 | status = clk_set_rate(chip->board->dac_clk, status); | |
190 | if (status < 0) | |
191 | return status; | |
192 | ||
193 | /* Set divider in SSC device. */ | |
194 | ssc_writel(chip->ssc->regs, CMR, ssc_div/2); | |
195 | ||
196 | /* SSC clock / (ssc divider * 16-bit * stereo). */ | |
197 | chip->bitrate = ssc_rate / (ssc_div * 16 * 2); | |
198 | ||
199 | dev_info(&chip->spi->dev, | |
200 | "at73c213: supported bitrate is %lu (%lu divider)\n", | |
201 | chip->bitrate, ssc_div); | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream) | |
207 | { | |
208 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
209 | struct snd_pcm_runtime *runtime = substream->runtime; | |
210 | ||
211 | snd_at73c213_playback_hw.rate_min = chip->bitrate; | |
212 | snd_at73c213_playback_hw.rate_max = chip->bitrate; | |
213 | runtime->hw = snd_at73c213_playback_hw; | |
214 | chip->substream = substream; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream) | |
220 | { | |
221 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
222 | chip->substream = NULL; | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream, | |
227 | struct snd_pcm_hw_params *hw_params) | |
228 | { | |
229 | return snd_pcm_lib_malloc_pages(substream, | |
230 | params_buffer_bytes(hw_params)); | |
231 | } | |
232 | ||
233 | static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream) | |
234 | { | |
235 | return snd_pcm_lib_free_pages(substream); | |
236 | } | |
237 | ||
238 | static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream) | |
239 | { | |
240 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
241 | struct snd_pcm_runtime *runtime = substream->runtime; | |
242 | int block_size; | |
243 | ||
244 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
245 | ||
246 | chip->period = 0; | |
247 | ||
248 | ssc_writel(chip->ssc->regs, PDC_TPR, | |
249 | (long)runtime->dma_addr); | |
250 | ssc_writel(chip->ssc->regs, PDC_TCR, runtime->period_size * 2); | |
251 | ssc_writel(chip->ssc->regs, PDC_TNPR, | |
252 | (long)runtime->dma_addr + block_size); | |
253 | ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream, | |
259 | int cmd) | |
260 | { | |
261 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
262 | int retval = 0; | |
263 | ||
264 | spin_lock(&chip->lock); | |
265 | ||
266 | switch (cmd) { | |
267 | case SNDRV_PCM_TRIGGER_START: | |
268 | ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX)); | |
269 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN)); | |
270 | break; | |
271 | case SNDRV_PCM_TRIGGER_STOP: | |
272 | ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS)); | |
273 | ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX)); | |
274 | break; | |
275 | default: | |
276 | dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd); | |
277 | retval = -EINVAL; | |
278 | break; | |
279 | } | |
280 | ||
281 | spin_unlock(&chip->lock); | |
282 | ||
283 | return retval; | |
284 | } | |
285 | ||
286 | static snd_pcm_uframes_t | |
287 | snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream) | |
288 | { | |
289 | struct snd_at73c213 *chip = snd_pcm_substream_chip(substream); | |
290 | struct snd_pcm_runtime *runtime = substream->runtime; | |
291 | snd_pcm_uframes_t pos; | |
292 | unsigned long bytes; | |
293 | ||
294 | bytes = ssc_readl(chip->ssc->regs, PDC_TPR) | |
295 | - (unsigned long)runtime->dma_addr; | |
296 | ||
297 | pos = bytes_to_frames(runtime, bytes); | |
298 | if (pos >= runtime->buffer_size) | |
299 | pos -= runtime->buffer_size; | |
300 | ||
301 | return pos; | |
302 | } | |
303 | ||
304 | static struct snd_pcm_ops at73c213_playback_ops = { | |
305 | .open = snd_at73c213_pcm_open, | |
306 | .close = snd_at73c213_pcm_close, | |
307 | .ioctl = snd_pcm_lib_ioctl, | |
308 | .hw_params = snd_at73c213_pcm_hw_params, | |
309 | .hw_free = snd_at73c213_pcm_hw_free, | |
310 | .prepare = snd_at73c213_pcm_prepare, | |
311 | .trigger = snd_at73c213_pcm_trigger, | |
312 | .pointer = snd_at73c213_pcm_pointer, | |
313 | }; | |
314 | ||
315 | static void snd_at73c213_pcm_free(struct snd_pcm *pcm) | |
316 | { | |
317 | struct snd_at73c213 *chip = snd_pcm_chip(pcm); | |
318 | if (chip->pcm) { | |
319 | snd_pcm_lib_preallocate_free_for_all(chip->pcm); | |
320 | chip->pcm = NULL; | |
321 | } | |
322 | } | |
323 | ||
324 | static int __devinit snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device) | |
325 | { | |
326 | struct snd_pcm *pcm; | |
327 | int retval; | |
328 | ||
329 | retval = snd_pcm_new(chip->card, chip->card->shortname, | |
330 | device, 1, 0, &pcm); | |
331 | if (retval < 0) | |
332 | goto out; | |
333 | ||
334 | pcm->private_data = chip; | |
335 | pcm->private_free = snd_at73c213_pcm_free; | |
336 | pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER; | |
337 | strcpy(pcm->name, "at73c213"); | |
338 | chip->pcm = pcm; | |
339 | ||
340 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops); | |
341 | ||
342 | retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm, | |
343 | SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev, | |
344 | 64 * 1024, 64 * 1024); | |
345 | out: | |
346 | return retval; | |
347 | } | |
348 | ||
349 | static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id) | |
350 | { | |
351 | struct snd_at73c213 *chip = dev_id; | |
352 | struct snd_pcm_runtime *runtime = chip->substream->runtime; | |
353 | u32 status; | |
354 | int offset; | |
355 | int block_size; | |
356 | int next_period; | |
357 | int retval = IRQ_NONE; | |
358 | ||
359 | spin_lock(&chip->lock); | |
360 | ||
361 | block_size = frames_to_bytes(runtime, runtime->period_size); | |
362 | status = ssc_readl(chip->ssc->regs, IMR); | |
363 | ||
364 | if (status & SSC_BIT(IMR_ENDTX)) { | |
365 | chip->period++; | |
366 | if (chip->period == runtime->periods) | |
367 | chip->period = 0; | |
368 | next_period = chip->period + 1; | |
369 | if (next_period == runtime->periods) | |
370 | next_period = 0; | |
371 | ||
372 | offset = block_size * next_period; | |
373 | ||
374 | ssc_writel(chip->ssc->regs, PDC_TNPR, | |
375 | (long)runtime->dma_addr + offset); | |
376 | ssc_writel(chip->ssc->regs, PDC_TNCR, runtime->period_size * 2); | |
377 | retval = IRQ_HANDLED; | |
378 | } | |
379 | ||
380 | ssc_readl(chip->ssc->regs, IMR); | |
381 | spin_unlock(&chip->lock); | |
382 | ||
383 | if (status & SSC_BIT(IMR_ENDTX)) | |
384 | snd_pcm_period_elapsed(chip->substream); | |
385 | ||
386 | return retval; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Mixer functions. | |
391 | */ | |
392 | static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol, | |
393 | struct snd_ctl_elem_value *ucontrol) | |
394 | { | |
395 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
396 | int reg = kcontrol->private_value & 0xff; | |
397 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
398 | int mask = (kcontrol->private_value >> 16) & 0xff; | |
399 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
400 | ||
401 | spin_lock_irq(&chip->lock); | |
402 | ||
403 | ucontrol->value.integer.value[0] = | |
404 | (chip->reg_image[reg] >> shift) & mask; | |
405 | ||
406 | if (invert) | |
407 | ucontrol->value.integer.value[0] = | |
408 | mask - ucontrol->value.integer.value[0]; | |
409 | ||
410 | spin_unlock_irq(&chip->lock); | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol, | |
416 | struct snd_ctl_elem_value *ucontrol) | |
417 | { | |
418 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
419 | int reg = kcontrol->private_value & 0xff; | |
420 | int shift = (kcontrol->private_value >> 8) & 0xff; | |
421 | int mask = (kcontrol->private_value >> 16) & 0xff; | |
422 | int invert = (kcontrol->private_value >> 24) & 0xff; | |
423 | int change, retval; | |
424 | unsigned short val; | |
425 | ||
426 | val = (ucontrol->value.integer.value[0] & mask); | |
427 | if (invert) | |
428 | val = mask - val; | |
429 | val <<= shift; | |
430 | ||
431 | spin_lock_irq(&chip->lock); | |
432 | ||
433 | val = (chip->reg_image[reg] & ~(mask << shift)) | val; | |
434 | change = val != chip->reg_image[reg]; | |
435 | retval = snd_at73c213_write_reg(chip, reg, val); | |
436 | ||
437 | spin_unlock_irq(&chip->lock); | |
438 | ||
439 | if (retval) | |
440 | return retval; | |
441 | ||
442 | return change; | |
443 | } | |
444 | ||
445 | static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol, | |
446 | struct snd_ctl_elem_info *uinfo) | |
447 | { | |
448 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
449 | ||
450 | if (mask == 1) | |
451 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
452 | else | |
453 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
454 | ||
455 | uinfo->count = 2; | |
456 | uinfo->value.integer.min = 0; | |
457 | uinfo->value.integer.max = mask; | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol, | |
463 | struct snd_ctl_elem_value *ucontrol) | |
464 | { | |
465 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
466 | int left_reg = kcontrol->private_value & 0xff; | |
467 | int right_reg = (kcontrol->private_value >> 8) & 0xff; | |
468 | int shift_left = (kcontrol->private_value >> 16) & 0x07; | |
469 | int shift_right = (kcontrol->private_value >> 19) & 0x07; | |
470 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
471 | int invert = (kcontrol->private_value >> 22) & 1; | |
472 | ||
473 | spin_lock_irq(&chip->lock); | |
474 | ||
475 | ucontrol->value.integer.value[0] = | |
476 | (chip->reg_image[left_reg] >> shift_left) & mask; | |
477 | ucontrol->value.integer.value[1] = | |
478 | (chip->reg_image[right_reg] >> shift_right) & mask; | |
479 | ||
480 | if (invert) { | |
481 | ucontrol->value.integer.value[0] = | |
482 | mask - ucontrol->value.integer.value[0]; | |
483 | ucontrol->value.integer.value[1] = | |
484 | mask - ucontrol->value.integer.value[1]; | |
485 | } | |
486 | ||
487 | spin_unlock_irq(&chip->lock); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol, | |
493 | struct snd_ctl_elem_value *ucontrol) | |
494 | { | |
495 | struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol); | |
496 | int left_reg = kcontrol->private_value & 0xff; | |
497 | int right_reg = (kcontrol->private_value >> 8) & 0xff; | |
498 | int shift_left = (kcontrol->private_value >> 16) & 0x07; | |
499 | int shift_right = (kcontrol->private_value >> 19) & 0x07; | |
500 | int mask = (kcontrol->private_value >> 24) & 0xff; | |
501 | int invert = (kcontrol->private_value >> 22) & 1; | |
502 | int change, retval; | |
503 | unsigned short val1, val2; | |
504 | ||
505 | val1 = ucontrol->value.integer.value[0] & mask; | |
506 | val2 = ucontrol->value.integer.value[1] & mask; | |
507 | if (invert) { | |
508 | val1 = mask - val1; | |
509 | val2 = mask - val2; | |
510 | } | |
511 | val1 <<= shift_left; | |
512 | val2 <<= shift_right; | |
513 | ||
514 | spin_lock_irq(&chip->lock); | |
515 | ||
516 | val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1; | |
517 | val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2; | |
518 | change = val1 != chip->reg_image[left_reg] | |
519 | || val2 != chip->reg_image[right_reg]; | |
520 | retval = snd_at73c213_write_reg(chip, left_reg, val1); | |
521 | if (retval) { | |
522 | spin_unlock_irq(&chip->lock); | |
523 | goto out; | |
524 | } | |
525 | retval = snd_at73c213_write_reg(chip, right_reg, val2); | |
526 | if (retval) { | |
527 | spin_unlock_irq(&chip->lock); | |
528 | goto out; | |
529 | } | |
530 | ||
531 | spin_unlock_irq(&chip->lock); | |
532 | ||
533 | return change; | |
534 | ||
535 | out: | |
536 | return retval; | |
537 | } | |
538 | ||
539 | static int snd_at73c213_mono_switch_info(struct snd_kcontrol *kcontrol, | |
540 | struct snd_ctl_elem_info *uinfo) | |
541 | { | |
542 | uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; | |
543 | uinfo->count = 1; | |
544 | uinfo->value.integer.min = 0; | |
545 | uinfo->value.integer.max = 1; | |
546 | ||
547 | return 0; | |
548 | } | |
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 | spin_lock_irq(&chip->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 | spin_unlock_irq(&chip->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 | spin_lock_irq(&chip->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 | spin_unlock_irq(&chip->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 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 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 | chip->card = card; | |
897 | chip->irq = -1; | |
898 | ||
899 | retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip); | |
900 | if (retval) { | |
901 | dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq); | |
902 | goto out; | |
903 | } | |
904 | chip->irq = irq; | |
905 | ||
906 | memcpy(&chip->reg_image, &snd_at73c213_original_image, | |
907 | sizeof(snd_at73c213_original_image)); | |
908 | ||
909 | retval = snd_at73c213_ssc_init(chip); | |
910 | if (retval) | |
911 | goto out_irq; | |
912 | ||
913 | retval = snd_at73c213_chip_init(chip); | |
914 | if (retval) | |
915 | goto out_irq; | |
916 | ||
917 | retval = snd_at73c213_pcm_new(chip, 0); | |
918 | if (retval) | |
919 | goto out_irq; | |
920 | ||
921 | retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); | |
922 | if (retval) | |
923 | goto out_irq; | |
924 | ||
925 | retval = snd_at73c213_mixer(chip); | |
926 | if (retval) | |
927 | goto out_snd_dev; | |
928 | ||
929 | snd_card_set_dev(card, &spi->dev); | |
930 | ||
931 | goto out; | |
932 | ||
933 | out_snd_dev: | |
934 | snd_device_free(card, chip); | |
935 | out_irq: | |
936 | free_irq(chip->irq, chip); | |
937 | chip->irq = -1; | |
938 | out: | |
939 | return retval; | |
940 | } | |
941 | ||
942 | static int snd_at73c213_probe(struct spi_device *spi) | |
943 | { | |
944 | struct snd_card *card; | |
945 | struct snd_at73c213 *chip; | |
946 | struct at73c213_board_info *board; | |
947 | int retval; | |
948 | char id[16]; | |
949 | ||
950 | board = spi->dev.platform_data; | |
951 | if (!board) { | |
952 | dev_dbg(&spi->dev, "no platform_data\n"); | |
953 | return -ENXIO; | |
954 | } | |
955 | ||
956 | if (!board->dac_clk) { | |
957 | dev_dbg(&spi->dev, "no DAC clk\n"); | |
958 | return -ENXIO; | |
959 | } | |
960 | ||
961 | if (IS_ERR(board->dac_clk)) { | |
962 | dev_dbg(&spi->dev, "no DAC clk\n"); | |
963 | return PTR_ERR(board->dac_clk); | |
964 | } | |
965 | ||
966 | retval = -ENOMEM; | |
967 | ||
968 | /* Allocate "card" using some unused identifiers. */ | |
969 | snprintf(id, sizeof id, "at73c213_%d", board->ssc_id); | |
970 | card = snd_card_new(-1, id, THIS_MODULE, sizeof(struct snd_at73c213)); | |
971 | if (!card) | |
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 <hcegtvedt@atmel.com>"); | |
1128 | MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC"); | |
1129 | MODULE_LICENSE("GPL"); |