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[deliverable/linux.git] / sound / soc / sunxi / sun4i-spdif.c
1 /*
2 * ALSA SoC SPDIF Audio Layer
3 *
4 * Copyright 2015 Andrea Venturi <be17068@iperbole.bo.it>
5 * Copyright 2015 Marcus Cooper <codekipper@gmail.com>
6 *
7 * Based on the Allwinner SDK driver, released under the GPL.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 */
19
20 #include <linux/clk.h>
21 #include <linux/delay.h>
22 #include <linux/device.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/regmap.h>
26 #include <linux/of_address.h>
27 #include <linux/of_device.h>
28 #include <linux/ioport.h>
29 #include <linux/module.h>
30 #include <linux/platform_device.h>
31 #include <linux/pm_runtime.h>
32 #include <linux/reset.h>
33 #include <sound/dmaengine_pcm.h>
34 #include <sound/pcm_params.h>
35 #include <sound/soc.h>
36
37 #define SUN4I_SPDIF_CTL (0x00)
38 #define SUN4I_SPDIF_CTL_MCLKDIV(v) ((v) << 4) /* v even */
39 #define SUN4I_SPDIF_CTL_MCLKOUTEN BIT(2)
40 #define SUN4I_SPDIF_CTL_GEN BIT(1)
41 #define SUN4I_SPDIF_CTL_RESET BIT(0)
42
43 #define SUN4I_SPDIF_TXCFG (0x04)
44 #define SUN4I_SPDIF_TXCFG_SINGLEMOD BIT(31)
45 #define SUN4I_SPDIF_TXCFG_ASS BIT(17)
46 #define SUN4I_SPDIF_TXCFG_NONAUDIO BIT(16)
47 #define SUN4I_SPDIF_TXCFG_TXRATIO(v) ((v) << 4)
48 #define SUN4I_SPDIF_TXCFG_TXRATIO_MASK GENMASK(8, 4)
49 #define SUN4I_SPDIF_TXCFG_FMTRVD GENMASK(3, 2)
50 #define SUN4I_SPDIF_TXCFG_FMT16BIT (0 << 2)
51 #define SUN4I_SPDIF_TXCFG_FMT20BIT (1 << 2)
52 #define SUN4I_SPDIF_TXCFG_FMT24BIT (2 << 2)
53 #define SUN4I_SPDIF_TXCFG_CHSTMODE BIT(1)
54 #define SUN4I_SPDIF_TXCFG_TXEN BIT(0)
55
56 #define SUN4I_SPDIF_RXCFG (0x08)
57 #define SUN4I_SPDIF_RXCFG_LOCKFLAG BIT(4)
58 #define SUN4I_SPDIF_RXCFG_CHSTSRC BIT(3)
59 #define SUN4I_SPDIF_RXCFG_CHSTCP BIT(1)
60 #define SUN4I_SPDIF_RXCFG_RXEN BIT(0)
61
62 #define SUN4I_SPDIF_TXFIFO (0x0C)
63
64 #define SUN4I_SPDIF_RXFIFO (0x10)
65
66 #define SUN4I_SPDIF_FCTL (0x14)
67 #define SUN4I_SPDIF_FCTL_FIFOSRC BIT(31)
68 #define SUN4I_SPDIF_FCTL_FTX BIT(17)
69 #define SUN4I_SPDIF_FCTL_FRX BIT(16)
70 #define SUN4I_SPDIF_FCTL_TXTL(v) ((v) << 8)
71 #define SUN4I_SPDIF_FCTL_TXTL_MASK GENMASK(12, 8)
72 #define SUN4I_SPDIF_FCTL_RXTL(v) ((v) << 3)
73 #define SUN4I_SPDIF_FCTL_RXTL_MASK GENMASK(7, 3)
74 #define SUN4I_SPDIF_FCTL_TXIM BIT(2)
75 #define SUN4I_SPDIF_FCTL_RXOM(v) ((v) << 0)
76 #define SUN4I_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
77
78 #define SUN4I_SPDIF_FSTA (0x18)
79 #define SUN4I_SPDIF_FSTA_TXE BIT(14)
80 #define SUN4I_SPDIF_FSTA_TXECNTSHT (8)
81 #define SUN4I_SPDIF_FSTA_RXA BIT(6)
82 #define SUN4I_SPDIF_FSTA_RXACNTSHT (0)
83
84 #define SUN4I_SPDIF_INT (0x1C)
85 #define SUN4I_SPDIF_INT_RXLOCKEN BIT(18)
86 #define SUN4I_SPDIF_INT_RXUNLOCKEN BIT(17)
87 #define SUN4I_SPDIF_INT_RXPARERREN BIT(16)
88 #define SUN4I_SPDIF_INT_TXDRQEN BIT(7)
89 #define SUN4I_SPDIF_INT_TXUIEN BIT(6)
90 #define SUN4I_SPDIF_INT_TXOIEN BIT(5)
91 #define SUN4I_SPDIF_INT_TXEIEN BIT(4)
92 #define SUN4I_SPDIF_INT_RXDRQEN BIT(2)
93 #define SUN4I_SPDIF_INT_RXOIEN BIT(1)
94 #define SUN4I_SPDIF_INT_RXAIEN BIT(0)
95
96 #define SUN4I_SPDIF_ISTA (0x20)
97 #define SUN4I_SPDIF_ISTA_RXLOCKSTA BIT(18)
98 #define SUN4I_SPDIF_ISTA_RXUNLOCKSTA BIT(17)
99 #define SUN4I_SPDIF_ISTA_RXPARERRSTA BIT(16)
100 #define SUN4I_SPDIF_ISTA_TXUSTA BIT(6)
101 #define SUN4I_SPDIF_ISTA_TXOSTA BIT(5)
102 #define SUN4I_SPDIF_ISTA_TXESTA BIT(4)
103 #define SUN4I_SPDIF_ISTA_RXOSTA BIT(1)
104 #define SUN4I_SPDIF_ISTA_RXASTA BIT(0)
105
106 #define SUN4I_SPDIF_TXCNT (0x24)
107
108 #define SUN4I_SPDIF_RXCNT (0x28)
109
110 #define SUN4I_SPDIF_TXCHSTA0 (0x2C)
111 #define SUN4I_SPDIF_TXCHSTA0_CLK(v) ((v) << 28)
112 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ(v) ((v) << 24)
113 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ_MASK GENMASK(27, 24)
114 #define SUN4I_SPDIF_TXCHSTA0_CHNUM(v) ((v) << 20)
115 #define SUN4I_SPDIF_TXCHSTA0_CHNUM_MASK GENMASK(23, 20)
116 #define SUN4I_SPDIF_TXCHSTA0_SRCNUM(v) ((v) << 16)
117 #define SUN4I_SPDIF_TXCHSTA0_CATACOD(v) ((v) << 8)
118 #define SUN4I_SPDIF_TXCHSTA0_MODE(v) ((v) << 6)
119 #define SUN4I_SPDIF_TXCHSTA0_EMPHASIS(v) ((v) << 3)
120 #define SUN4I_SPDIF_TXCHSTA0_CP BIT(2)
121 #define SUN4I_SPDIF_TXCHSTA0_AUDIO BIT(1)
122 #define SUN4I_SPDIF_TXCHSTA0_PRO BIT(0)
123
124 #define SUN4I_SPDIF_TXCHSTA1 (0x30)
125 #define SUN4I_SPDIF_TXCHSTA1_CGMSA(v) ((v) << 8)
126 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ(v) ((v) << 4)
127 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ_MASK GENMASK(7, 4)
128 #define SUN4I_SPDIF_TXCHSTA1_SAMWORDLEN(v) ((v) << 1)
129 #define SUN4I_SPDIF_TXCHSTA1_MAXWORDLEN BIT(0)
130
131 #define SUN4I_SPDIF_RXCHSTA0 (0x34)
132 #define SUN4I_SPDIF_RXCHSTA0_CLK(v) ((v) << 28)
133 #define SUN4I_SPDIF_RXCHSTA0_SAMFREQ(v) ((v) << 24)
134 #define SUN4I_SPDIF_RXCHSTA0_CHNUM(v) ((v) << 20)
135 #define SUN4I_SPDIF_RXCHSTA0_SRCNUM(v) ((v) << 16)
136 #define SUN4I_SPDIF_RXCHSTA0_CATACOD(v) ((v) << 8)
137 #define SUN4I_SPDIF_RXCHSTA0_MODE(v) ((v) << 6)
138 #define SUN4I_SPDIF_RXCHSTA0_EMPHASIS(v) ((v) << 3)
139 #define SUN4I_SPDIF_RXCHSTA0_CP BIT(2)
140 #define SUN4I_SPDIF_RXCHSTA0_AUDIO BIT(1)
141 #define SUN4I_SPDIF_RXCHSTA0_PRO BIT(0)
142
143 #define SUN4I_SPDIF_RXCHSTA1 (0x38)
144 #define SUN4I_SPDIF_RXCHSTA1_CGMSA(v) ((v) << 8)
145 #define SUN4I_SPDIF_RXCHSTA1_ORISAMFREQ(v) ((v) << 4)
146 #define SUN4I_SPDIF_RXCHSTA1_SAMWORDLEN(v) ((v) << 1)
147 #define SUN4I_SPDIF_RXCHSTA1_MAXWORDLEN BIT(0)
148
149 /* Defines for Sampling Frequency */
150 #define SUN4I_SPDIF_SAMFREQ_44_1KHZ 0x0
151 #define SUN4I_SPDIF_SAMFREQ_NOT_INDICATED 0x1
152 #define SUN4I_SPDIF_SAMFREQ_48KHZ 0x2
153 #define SUN4I_SPDIF_SAMFREQ_32KHZ 0x3
154 #define SUN4I_SPDIF_SAMFREQ_22_05KHZ 0x4
155 #define SUN4I_SPDIF_SAMFREQ_24KHZ 0x6
156 #define SUN4I_SPDIF_SAMFREQ_88_2KHZ 0x8
157 #define SUN4I_SPDIF_SAMFREQ_76_8KHZ 0x9
158 #define SUN4I_SPDIF_SAMFREQ_96KHZ 0xa
159 #define SUN4I_SPDIF_SAMFREQ_176_4KHZ 0xc
160 #define SUN4I_SPDIF_SAMFREQ_192KHZ 0xe
161
162 struct sun4i_spdif_dev {
163 struct platform_device *pdev;
164 struct clk *spdif_clk;
165 struct clk *apb_clk;
166 struct reset_control *rst;
167 struct snd_soc_dai_driver cpu_dai_drv;
168 struct regmap *regmap;
169 struct snd_dmaengine_dai_dma_data dma_params_tx;
170 };
171
172 static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
173 {
174 /* soft reset SPDIF */
175 regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET);
176
177 /* flush TX FIFO */
178 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
179 SUN4I_SPDIF_FCTL_FTX, SUN4I_SPDIF_FCTL_FTX);
180
181 /* clear TX counter */
182 regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0);
183 }
184
185 static void sun4i_snd_txctrl_on(struct snd_pcm_substream *substream,
186 struct sun4i_spdif_dev *host)
187 {
188 if (substream->runtime->channels == 1)
189 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
190 SUN4I_SPDIF_TXCFG_SINGLEMOD,
191 SUN4I_SPDIF_TXCFG_SINGLEMOD);
192
193 /* SPDIF TX ENABLE */
194 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
195 SUN4I_SPDIF_TXCFG_TXEN, SUN4I_SPDIF_TXCFG_TXEN);
196
197 /* DRQ ENABLE */
198 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
199 SUN4I_SPDIF_INT_TXDRQEN, SUN4I_SPDIF_INT_TXDRQEN);
200
201 /* Global enable */
202 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
203 SUN4I_SPDIF_CTL_GEN, SUN4I_SPDIF_CTL_GEN);
204 }
205
206 static void sun4i_snd_txctrl_off(struct snd_pcm_substream *substream,
207 struct sun4i_spdif_dev *host)
208 {
209 /* SPDIF TX DISABLE */
210 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
211 SUN4I_SPDIF_TXCFG_TXEN, 0);
212
213 /* DRQ DISABLE */
214 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
215 SUN4I_SPDIF_INT_TXDRQEN, 0);
216
217 /* Global disable */
218 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
219 SUN4I_SPDIF_CTL_GEN, 0);
220 }
221
222 static int sun4i_spdif_startup(struct snd_pcm_substream *substream,
223 struct snd_soc_dai *cpu_dai)
224 {
225 struct snd_soc_pcm_runtime *rtd = substream->private_data;
226 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(rtd->cpu_dai);
227
228 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
229 return -EINVAL;
230
231 sun4i_spdif_configure(host);
232
233 return 0;
234 }
235
236 static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
237 struct snd_pcm_hw_params *params,
238 struct snd_soc_dai *cpu_dai)
239 {
240 int ret = 0;
241 int fmt;
242 unsigned long rate = params_rate(params);
243 u32 mclk_div = 0;
244 unsigned int mclk = 0;
245 u32 reg_val;
246 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
247 struct platform_device *pdev = host->pdev;
248
249 /* Add the PCM and raw data select interface */
250 switch (params_channels(params)) {
251 case 1: /* PCM mode */
252 case 2:
253 fmt = 0;
254 break;
255 case 4: /* raw data mode */
256 fmt = SUN4I_SPDIF_TXCFG_NONAUDIO;
257 break;
258 default:
259 return -EINVAL;
260 }
261
262 switch (params_format(params)) {
263 case SNDRV_PCM_FORMAT_S16_LE:
264 fmt |= SUN4I_SPDIF_TXCFG_FMT16BIT;
265 break;
266 case SNDRV_PCM_FORMAT_S20_3LE:
267 fmt |= SUN4I_SPDIF_TXCFG_FMT20BIT;
268 break;
269 case SNDRV_PCM_FORMAT_S24_LE:
270 fmt |= SUN4I_SPDIF_TXCFG_FMT24BIT;
271 break;
272 default:
273 return -EINVAL;
274 }
275
276 switch (rate) {
277 case 22050:
278 case 44100:
279 case 88200:
280 case 176400:
281 mclk = 22579200;
282 break;
283 case 24000:
284 case 32000:
285 case 48000:
286 case 96000:
287 case 192000:
288 mclk = 24576000;
289 break;
290 default:
291 return -EINVAL;
292 }
293
294 ret = clk_set_rate(host->spdif_clk, mclk);
295 if (ret < 0) {
296 dev_err(&pdev->dev,
297 "Setting SPDIF clock rate for %d Hz failed!\n", mclk);
298 return ret;
299 }
300
301 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
302 SUN4I_SPDIF_FCTL_TXIM, SUN4I_SPDIF_FCTL_TXIM);
303
304 switch (rate) {
305 case 22050:
306 case 24000:
307 mclk_div = 8;
308 break;
309 case 32000:
310 mclk_div = 6;
311 break;
312 case 44100:
313 case 48000:
314 mclk_div = 4;
315 break;
316 case 88200:
317 case 96000:
318 mclk_div = 2;
319 break;
320 case 176400:
321 case 192000:
322 mclk_div = 1;
323 break;
324 default:
325 return -EINVAL;
326 }
327
328 reg_val = 0;
329 reg_val |= SUN4I_SPDIF_TXCFG_ASS;
330 reg_val |= fmt; /* set non audio and bit depth */
331 reg_val |= SUN4I_SPDIF_TXCFG_CHSTMODE;
332 reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1);
333 regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val);
334
335 return 0;
336 }
337
338 static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
339 struct snd_soc_dai *dai)
340 {
341 int ret = 0;
342 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
343
344 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
345 return -EINVAL;
346
347 switch (cmd) {
348 case SNDRV_PCM_TRIGGER_START:
349 case SNDRV_PCM_TRIGGER_RESUME:
350 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
351 sun4i_snd_txctrl_on(substream, host);
352 break;
353
354 case SNDRV_PCM_TRIGGER_STOP:
355 case SNDRV_PCM_TRIGGER_SUSPEND:
356 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
357 sun4i_snd_txctrl_off(substream, host);
358 break;
359
360 default:
361 ret = -EINVAL;
362 break;
363 }
364 return ret;
365 }
366
367 static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai)
368 {
369 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
370
371 snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);
372 return 0;
373 }
374
375 static const struct snd_soc_dai_ops sun4i_spdif_dai_ops = {
376 .startup = sun4i_spdif_startup,
377 .trigger = sun4i_spdif_trigger,
378 .hw_params = sun4i_spdif_hw_params,
379 };
380
381 static const struct regmap_config sun4i_spdif_regmap_config = {
382 .reg_bits = 32,
383 .reg_stride = 4,
384 .val_bits = 32,
385 .max_register = SUN4I_SPDIF_RXCHSTA1,
386 };
387
388 #define SUN4I_RATES SNDRV_PCM_RATE_8000_192000
389
390 #define SUN4I_FORMATS (SNDRV_PCM_FORMAT_S16_LE | \
391 SNDRV_PCM_FORMAT_S20_3LE | \
392 SNDRV_PCM_FORMAT_S24_LE)
393
394 static struct snd_soc_dai_driver sun4i_spdif_dai = {
395 .playback = {
396 .channels_min = 1,
397 .channels_max = 2,
398 .rates = SUN4I_RATES,
399 .formats = SUN4I_FORMATS,
400 },
401 .probe = sun4i_spdif_soc_dai_probe,
402 .ops = &sun4i_spdif_dai_ops,
403 .name = "spdif",
404 };
405
406 static const struct snd_soc_dapm_widget dit_widgets[] = {
407 SND_SOC_DAPM_OUTPUT("spdif-out"),
408 };
409
410 static const struct snd_soc_dapm_route dit_routes[] = {
411 { "spdif-out", NULL, "Playback" },
412 };
413
414 static const struct of_device_id sun4i_spdif_of_match[] = {
415 { .compatible = "allwinner,sun4i-a10-spdif", },
416 { .compatible = "allwinner,sun6i-a31-spdif", },
417 { /* sentinel */ }
418 };
419 MODULE_DEVICE_TABLE(of, sun4i_spdif_of_match);
420
421 static const struct snd_soc_component_driver sun4i_spdif_component = {
422 .name = "sun4i-spdif",
423 };
424
425 static int sun4i_spdif_runtime_suspend(struct device *dev)
426 {
427 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
428
429 clk_disable_unprepare(host->spdif_clk);
430 clk_disable_unprepare(host->apb_clk);
431
432 return 0;
433 }
434
435 static int sun4i_spdif_runtime_resume(struct device *dev)
436 {
437 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
438
439 clk_prepare_enable(host->spdif_clk);
440 clk_prepare_enable(host->apb_clk);
441
442 return 0;
443 }
444
445 static int sun4i_spdif_probe(struct platform_device *pdev)
446 {
447 struct sun4i_spdif_dev *host;
448 struct resource *res;
449 int ret;
450 void __iomem *base;
451
452 dev_dbg(&pdev->dev, "Entered %s\n", __func__);
453
454 host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
455 if (!host)
456 return -ENOMEM;
457
458 host->pdev = pdev;
459
460 /* Initialize this copy of the CPU DAI driver structure */
461 memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));
462 host->cpu_dai_drv.name = dev_name(&pdev->dev);
463
464 /* Get the addresses */
465 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
466 base = devm_ioremap_resource(&pdev->dev, res);
467 if (IS_ERR(base))
468 return PTR_ERR(base);
469
470 host->regmap = devm_regmap_init_mmio(&pdev->dev, base,
471 &sun4i_spdif_regmap_config);
472
473 /* Clocks */
474 host->apb_clk = devm_clk_get(&pdev->dev, "apb");
475 if (IS_ERR(host->apb_clk)) {
476 dev_err(&pdev->dev, "failed to get a apb clock.\n");
477 return PTR_ERR(host->apb_clk);
478 }
479
480 host->spdif_clk = devm_clk_get(&pdev->dev, "spdif");
481 if (IS_ERR(host->spdif_clk)) {
482 dev_err(&pdev->dev, "failed to get a spdif clock.\n");
483 ret = PTR_ERR(host->spdif_clk);
484 goto err_disable_apb_clk;
485 }
486
487 host->dma_params_tx.addr = res->start + SUN4I_SPDIF_TXFIFO;
488 host->dma_params_tx.maxburst = 8;
489 host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
490
491 platform_set_drvdata(pdev, host);
492
493 if (of_device_is_compatible(pdev->dev.of_node,
494 "allwinner,sun6i-a31-spdif")) {
495 host->rst = devm_reset_control_get_optional(&pdev->dev, NULL);
496 if (IS_ERR(host->rst) && PTR_ERR(host->rst) == -EPROBE_DEFER) {
497 ret = -EPROBE_DEFER;
498 dev_err(&pdev->dev, "Failed to get reset: %d\n", ret);
499 goto err_disable_apb_clk;
500 }
501 if (!IS_ERR(host->rst))
502 reset_control_deassert(host->rst);
503 }
504
505 ret = devm_snd_soc_register_component(&pdev->dev,
506 &sun4i_spdif_component, &sun4i_spdif_dai, 1);
507 if (ret)
508 goto err_disable_apb_clk;
509
510 pm_runtime_enable(&pdev->dev);
511 if (!pm_runtime_enabled(&pdev->dev)) {
512 ret = sun4i_spdif_runtime_resume(&pdev->dev);
513 if (ret)
514 goto err_unregister;
515 }
516
517 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
518 if (ret)
519 goto err_suspend;
520 return 0;
521 err_suspend:
522 if (!pm_runtime_status_suspended(&pdev->dev))
523 sun4i_spdif_runtime_suspend(&pdev->dev);
524 err_unregister:
525 pm_runtime_disable(&pdev->dev);
526 snd_soc_unregister_component(&pdev->dev);
527 err_disable_apb_clk:
528 clk_disable_unprepare(host->apb_clk);
529 return ret;
530 }
531
532 static int sun4i_spdif_remove(struct platform_device *pdev)
533 {
534 pm_runtime_disable(&pdev->dev);
535 if (!pm_runtime_status_suspended(&pdev->dev))
536 sun4i_spdif_runtime_suspend(&pdev->dev);
537
538 snd_soc_unregister_platform(&pdev->dev);
539 snd_soc_unregister_component(&pdev->dev);
540
541 return 0;
542 }
543
544 static const struct dev_pm_ops sun4i_spdif_pm = {
545 SET_RUNTIME_PM_OPS(sun4i_spdif_runtime_suspend,
546 sun4i_spdif_runtime_resume, NULL)
547 };
548
549 static struct platform_driver sun4i_spdif_driver = {
550 .driver = {
551 .name = "sun4i-spdif",
552 .of_match_table = of_match_ptr(sun4i_spdif_of_match),
553 .pm = &sun4i_spdif_pm,
554 },
555 .probe = sun4i_spdif_probe,
556 .remove = sun4i_spdif_remove,
557 };
558
559 module_platform_driver(sun4i_spdif_driver);
560
561 MODULE_AUTHOR("Marcus Cooper <codekipper@gmail.com>");
562 MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
563 MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface");
564 MODULE_LICENSE("GPL");
565 MODULE_ALIAS("platform:sun4i-spdif");
Linux kernel - Deliverables
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