1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * ALSA SoC SPDIF Audio Layer
4 *
5 * Copyright 2015 Andrea Venturi <be17068@iperbole.bo.it>
6 * Copyright 2015 Marcus Cooper <codekipper@gmail.com>
7 *
8 * Based on the Allwinner SDK driver, released under the GPL.
9 */
10
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/device.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/regmap.h>
17 #include <linux/of_address.h>
18 #include <linux/of_device.h>
19 #include <linux/ioport.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/reset.h>
24 #include <linux/spinlock.h>
25 #include <sound/asoundef.h>
26 #include <sound/dmaengine_pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29
30 #define SUN4I_SPDIF_CTL (0x00)
31 #define SUN4I_SPDIF_CTL_MCLKDIV(v) ((v) << 4) /* v even */
32 #define SUN4I_SPDIF_CTL_MCLKOUTEN BIT(2)
33 #define SUN4I_SPDIF_CTL_GEN BIT(1)
34 #define SUN4I_SPDIF_CTL_RESET BIT(0)
35
36 #define SUN4I_SPDIF_TXCFG (0x04)
37 #define SUN4I_SPDIF_TXCFG_SINGLEMOD BIT(31)
38 #define SUN4I_SPDIF_TXCFG_ASS BIT(17)
39 #define SUN4I_SPDIF_TXCFG_NONAUDIO BIT(16)
40 #define SUN4I_SPDIF_TXCFG_TXRATIO(v) ((v) << 4)
41 #define SUN4I_SPDIF_TXCFG_TXRATIO_MASK GENMASK(8, 4)
42 #define SUN4I_SPDIF_TXCFG_FMTRVD GENMASK(3, 2)
43 #define SUN4I_SPDIF_TXCFG_FMT16BIT (0 << 2)
44 #define SUN4I_SPDIF_TXCFG_FMT20BIT (1 << 2)
45 #define SUN4I_SPDIF_TXCFG_FMT24BIT (2 << 2)
46 #define SUN4I_SPDIF_TXCFG_CHSTMODE BIT(1)
47 #define SUN4I_SPDIF_TXCFG_TXEN BIT(0)
48
49 #define SUN4I_SPDIF_RXCFG (0x08)
50 #define SUN4I_SPDIF_RXCFG_LOCKFLAG BIT(4)
51 #define SUN4I_SPDIF_RXCFG_CHSTSRC BIT(3)
52 #define SUN4I_SPDIF_RXCFG_CHSTCP BIT(1)
53 #define SUN4I_SPDIF_RXCFG_RXEN BIT(0)
54
55 #define SUN4I_SPDIF_TXFIFO (0x0C)
56
57 #define SUN4I_SPDIF_RXFIFO (0x10)
58
59 #define SUN4I_SPDIF_FCTL (0x14)
60 #define SUN4I_SPDIF_FCTL_FIFOSRC BIT(31)
61 #define SUN4I_SPDIF_FCTL_FTX BIT(17)
62 #define SUN4I_SPDIF_FCTL_FRX BIT(16)
63 #define SUN4I_SPDIF_FCTL_TXTL(v) ((v) << 8)
64 #define SUN4I_SPDIF_FCTL_TXTL_MASK GENMASK(12, 8)
65 #define SUN4I_SPDIF_FCTL_RXTL(v) ((v) << 3)
66 #define SUN4I_SPDIF_FCTL_RXTL_MASK GENMASK(7, 3)
67 #define SUN4I_SPDIF_FCTL_TXIM BIT(2)
68 #define SUN4I_SPDIF_FCTL_RXOM(v) ((v) << 0)
69 #define SUN4I_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
70
71 #define SUN50I_H6_SPDIF_FCTL (0x14)
72 #define SUN50I_H6_SPDIF_FCTL_HUB_EN BIT(31)
73 #define SUN50I_H6_SPDIF_FCTL_FTX BIT(30)
74 #define SUN50I_H6_SPDIF_FCTL_FRX BIT(29)
75 #define SUN50I_H6_SPDIF_FCTL_TXTL(v) ((v) << 12)
76 #define SUN50I_H6_SPDIF_FCTL_TXTL_MASK GENMASK(19, 12)
77 #define SUN50I_H6_SPDIF_FCTL_RXTL(v) ((v) << 4)
78 #define SUN50I_H6_SPDIF_FCTL_RXTL_MASK GENMASK(10, 4)
79 #define SUN50I_H6_SPDIF_FCTL_TXIM BIT(2)
80 #define SUN50I_H6_SPDIF_FCTL_RXOM(v) ((v) << 0)
81 #define SUN50I_H6_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
82
83 #define SUN4I_SPDIF_FSTA (0x18)
84 #define SUN4I_SPDIF_FSTA_TXE BIT(14)
85 #define SUN4I_SPDIF_FSTA_TXECNTSHT (8)
86 #define SUN4I_SPDIF_FSTA_RXA BIT(6)
87 #define SUN4I_SPDIF_FSTA_RXACNTSHT (0)
88
89 #define SUN4I_SPDIF_INT (0x1C)
90 #define SUN4I_SPDIF_INT_RXLOCKEN BIT(18)
91 #define SUN4I_SPDIF_INT_RXUNLOCKEN BIT(17)
92 #define SUN4I_SPDIF_INT_RXPARERREN BIT(16)
93 #define SUN4I_SPDIF_INT_TXDRQEN BIT(7)
94 #define SUN4I_SPDIF_INT_TXUIEN BIT(6)
95 #define SUN4I_SPDIF_INT_TXOIEN BIT(5)
96 #define SUN4I_SPDIF_INT_TXEIEN BIT(4)
97 #define SUN4I_SPDIF_INT_RXDRQEN BIT(2)
98 #define SUN4I_SPDIF_INT_RXOIEN BIT(1)
99 #define SUN4I_SPDIF_INT_RXAIEN BIT(0)
100
101 #define SUN4I_SPDIF_ISTA (0x20)
102 #define SUN4I_SPDIF_ISTA_RXLOCKSTA BIT(18)
103 #define SUN4I_SPDIF_ISTA_RXUNLOCKSTA BIT(17)
104 #define SUN4I_SPDIF_ISTA_RXPARERRSTA BIT(16)
105 #define SUN4I_SPDIF_ISTA_TXUSTA BIT(6)
106 #define SUN4I_SPDIF_ISTA_TXOSTA BIT(5)
107 #define SUN4I_SPDIF_ISTA_TXESTA BIT(4)
108 #define SUN4I_SPDIF_ISTA_RXOSTA BIT(1)
109 #define SUN4I_SPDIF_ISTA_RXASTA BIT(0)
110
111 #define SUN8I_SPDIF_TXFIFO (0x20)
112
113 #define SUN4I_SPDIF_TXCNT (0x24)
114
115 #define SUN4I_SPDIF_RXCNT (0x28)
116
117 #define SUN4I_SPDIF_TXCHSTA0 (0x2C)
118 #define SUN4I_SPDIF_TXCHSTA0_CLK(v) ((v) << 28)
119 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ(v) ((v) << 24)
120 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ_MASK GENMASK(27, 24)
121 #define SUN4I_SPDIF_TXCHSTA0_CHNUM(v) ((v) << 20)
122 #define SUN4I_SPDIF_TXCHSTA0_CHNUM_MASK GENMASK(23, 20)
123 #define SUN4I_SPDIF_TXCHSTA0_SRCNUM(v) ((v) << 16)
124 #define SUN4I_SPDIF_TXCHSTA0_CATACOD(v) ((v) << 8)
125 #define SUN4I_SPDIF_TXCHSTA0_MODE(v) ((v) << 6)
126 #define SUN4I_SPDIF_TXCHSTA0_EMPHASIS(v) ((v) << 3)
127 #define SUN4I_SPDIF_TXCHSTA0_CP BIT(2)
128 #define SUN4I_SPDIF_TXCHSTA0_AUDIO BIT(1)
129 #define SUN4I_SPDIF_TXCHSTA0_PRO BIT(0)
130
131 #define SUN4I_SPDIF_TXCHSTA1 (0x30)
132 #define SUN4I_SPDIF_TXCHSTA1_CGMSA(v) ((v) << 8)
133 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ(v) ((v) << 4)
134 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ_MASK GENMASK(7, 4)
135 #define SUN4I_SPDIF_TXCHSTA1_SAMWORDLEN(v) ((v) << 1)
136 #define SUN4I_SPDIF_TXCHSTA1_MAXWORDLEN BIT(0)
137
138 #define SUN4I_SPDIF_RXCHSTA0 (0x34)
139 #define SUN4I_SPDIF_RXCHSTA0_CLK(v) ((v) << 28)
140 #define SUN4I_SPDIF_RXCHSTA0_SAMFREQ(v) ((v) << 24)
141 #define SUN4I_SPDIF_RXCHSTA0_CHNUM(v) ((v) << 20)
142 #define SUN4I_SPDIF_RXCHSTA0_SRCNUM(v) ((v) << 16)
143 #define SUN4I_SPDIF_RXCHSTA0_CATACOD(v) ((v) << 8)
144 #define SUN4I_SPDIF_RXCHSTA0_MODE(v) ((v) << 6)
145 #define SUN4I_SPDIF_RXCHSTA0_EMPHASIS(v) ((v) << 3)
146 #define SUN4I_SPDIF_RXCHSTA0_CP BIT(2)
147 #define SUN4I_SPDIF_RXCHSTA0_AUDIO BIT(1)
148 #define SUN4I_SPDIF_RXCHSTA0_PRO BIT(0)
149
150 #define SUN4I_SPDIF_RXCHSTA1 (0x38)
151 #define SUN4I_SPDIF_RXCHSTA1_CGMSA(v) ((v) << 8)
152 #define SUN4I_SPDIF_RXCHSTA1_ORISAMFREQ(v) ((v) << 4)
153 #define SUN4I_SPDIF_RXCHSTA1_SAMWORDLEN(v) ((v) << 1)
154 #define SUN4I_SPDIF_RXCHSTA1_MAXWORDLEN BIT(0)
155
156 /* Defines for Sampling Frequency */
157 #define SUN4I_SPDIF_SAMFREQ_44_1KHZ 0x0
158 #define SUN4I_SPDIF_SAMFREQ_NOT_INDICATED 0x1
159 #define SUN4I_SPDIF_SAMFREQ_48KHZ 0x2
160 #define SUN4I_SPDIF_SAMFREQ_32KHZ 0x3
161 #define SUN4I_SPDIF_SAMFREQ_22_05KHZ 0x4
162 #define SUN4I_SPDIF_SAMFREQ_24KHZ 0x6
163 #define SUN4I_SPDIF_SAMFREQ_88_2KHZ 0x8
164 #define SUN4I_SPDIF_SAMFREQ_76_8KHZ 0x9
165 #define SUN4I_SPDIF_SAMFREQ_96KHZ 0xa
166 #define SUN4I_SPDIF_SAMFREQ_176_4KHZ 0xc
167 #define SUN4I_SPDIF_SAMFREQ_192KHZ 0xe
168
169 /**
170 * struct sun4i_spdif_quirks - Differences between SoC variants.
171 *
172 * @reg_dac_txdata: TX FIFO offset for DMA config.
173 * @has_reset: SoC needs reset deasserted.
174 * @val_fctl_ftx: TX FIFO flush bitmask.
175 */
176 struct sun4i_spdif_quirks {
177 unsigned int reg_dac_txdata;
178 bool has_reset;
179 unsigned int val_fctl_ftx;
180 };
181
182 struct sun4i_spdif_dev {
183 struct platform_device *pdev;
184 struct clk *spdif_clk;
185 struct clk *apb_clk;
186 struct reset_control *rst;
187 struct snd_soc_dai_driver cpu_dai_drv;
188 struct regmap *regmap;
189 struct snd_dmaengine_dai_dma_data dma_params_tx;
190 const struct sun4i_spdif_quirks *quirks;
191 spinlock_t lock;
192 };
193
sun4i_spdif_configure(struct sun4i_spdif_dev * host)194 static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
195 {
196 const struct sun4i_spdif_quirks *quirks = host->quirks;
197
198 /* soft reset SPDIF */
199 regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET);
200
201 /* flush TX FIFO */
202 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
203 quirks->val_fctl_ftx, quirks->val_fctl_ftx);
204
205 /* clear TX counter */
206 regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0);
207 }
208
sun4i_snd_txctrl_on(struct snd_pcm_substream * substream,struct sun4i_spdif_dev * host)209 static void sun4i_snd_txctrl_on(struct snd_pcm_substream *substream,
210 struct sun4i_spdif_dev *host)
211 {
212 if (substream->runtime->channels == 1)
213 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
214 SUN4I_SPDIF_TXCFG_SINGLEMOD,
215 SUN4I_SPDIF_TXCFG_SINGLEMOD);
216
217 /* SPDIF TX ENABLE */
218 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
219 SUN4I_SPDIF_TXCFG_TXEN, SUN4I_SPDIF_TXCFG_TXEN);
220
221 /* DRQ ENABLE */
222 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
223 SUN4I_SPDIF_INT_TXDRQEN, SUN4I_SPDIF_INT_TXDRQEN);
224
225 /* Global enable */
226 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
227 SUN4I_SPDIF_CTL_GEN, SUN4I_SPDIF_CTL_GEN);
228 }
229
sun4i_snd_txctrl_off(struct snd_pcm_substream * substream,struct sun4i_spdif_dev * host)230 static void sun4i_snd_txctrl_off(struct snd_pcm_substream *substream,
231 struct sun4i_spdif_dev *host)
232 {
233 /* SPDIF TX DISABLE */
234 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
235 SUN4I_SPDIF_TXCFG_TXEN, 0);
236
237 /* DRQ DISABLE */
238 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
239 SUN4I_SPDIF_INT_TXDRQEN, 0);
240
241 /* Global disable */
242 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
243 SUN4I_SPDIF_CTL_GEN, 0);
244 }
245
sun4i_spdif_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)246 static int sun4i_spdif_startup(struct snd_pcm_substream *substream,
247 struct snd_soc_dai *cpu_dai)
248 {
249 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
250 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
251
252 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
253 return -EINVAL;
254
255 sun4i_spdif_configure(host);
256
257 return 0;
258 }
259
sun4i_spdif_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * cpu_dai)260 static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
261 struct snd_pcm_hw_params *params,
262 struct snd_soc_dai *cpu_dai)
263 {
264 int ret = 0;
265 int fmt;
266 unsigned long rate = params_rate(params);
267 u32 mclk_div = 0;
268 unsigned int mclk = 0;
269 u32 reg_val;
270 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
271 struct platform_device *pdev = host->pdev;
272
273 /* Add the PCM and raw data select interface */
274 switch (params_channels(params)) {
275 case 1: /* PCM mode */
276 case 2:
277 fmt = 0;
278 break;
279 case 4: /* raw data mode */
280 fmt = SUN4I_SPDIF_TXCFG_NONAUDIO;
281 break;
282 default:
283 return -EINVAL;
284 }
285
286 switch (params_format(params)) {
287 case SNDRV_PCM_FORMAT_S16_LE:
288 fmt |= SUN4I_SPDIF_TXCFG_FMT16BIT;
289 break;
290 case SNDRV_PCM_FORMAT_S20_3LE:
291 fmt |= SUN4I_SPDIF_TXCFG_FMT20BIT;
292 break;
293 case SNDRV_PCM_FORMAT_S24_LE:
294 fmt |= SUN4I_SPDIF_TXCFG_FMT24BIT;
295 break;
296 default:
297 return -EINVAL;
298 }
299
300 switch (rate) {
301 case 22050:
302 case 44100:
303 case 88200:
304 case 176400:
305 mclk = 22579200;
306 break;
307 case 24000:
308 case 32000:
309 case 48000:
310 case 96000:
311 case 192000:
312 mclk = 24576000;
313 break;
314 default:
315 return -EINVAL;
316 }
317
318 ret = clk_set_rate(host->spdif_clk, mclk);
319 if (ret < 0) {
320 dev_err(&pdev->dev,
321 "Setting SPDIF clock rate for %d Hz failed!\n", mclk);
322 return ret;
323 }
324
325 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
326 SUN4I_SPDIF_FCTL_TXIM, SUN4I_SPDIF_FCTL_TXIM);
327
328 switch (rate) {
329 case 22050:
330 case 24000:
331 mclk_div = 8;
332 break;
333 case 32000:
334 mclk_div = 6;
335 break;
336 case 44100:
337 case 48000:
338 mclk_div = 4;
339 break;
340 case 88200:
341 case 96000:
342 mclk_div = 2;
343 break;
344 case 176400:
345 case 192000:
346 mclk_div = 1;
347 break;
348 default:
349 return -EINVAL;
350 }
351
352 reg_val = 0;
353 reg_val |= SUN4I_SPDIF_TXCFG_ASS;
354 reg_val |= fmt; /* set non audio and bit depth */
355 reg_val |= SUN4I_SPDIF_TXCFG_CHSTMODE;
356 reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1);
357 regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val);
358
359 return 0;
360 }
361
sun4i_spdif_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)362 static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
363 struct snd_soc_dai *dai)
364 {
365 int ret = 0;
366 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
367
368 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
369 return -EINVAL;
370
371 switch (cmd) {
372 case SNDRV_PCM_TRIGGER_START:
373 case SNDRV_PCM_TRIGGER_RESUME:
374 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
375 sun4i_snd_txctrl_on(substream, host);
376 break;
377
378 case SNDRV_PCM_TRIGGER_STOP:
379 case SNDRV_PCM_TRIGGER_SUSPEND:
380 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
381 sun4i_snd_txctrl_off(substream, host);
382 break;
383
384 default:
385 ret = -EINVAL;
386 break;
387 }
388 return ret;
389 }
390
sun4i_spdif_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)391 static int sun4i_spdif_info(struct snd_kcontrol *kcontrol,
392 struct snd_ctl_elem_info *uinfo)
393 {
394 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
395 uinfo->count = 1;
396
397 return 0;
398 }
399
sun4i_spdif_get_status_mask(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)400 static int sun4i_spdif_get_status_mask(struct snd_kcontrol *kcontrol,
401 struct snd_ctl_elem_value *ucontrol)
402 {
403 u8 *status = ucontrol->value.iec958.status;
404
405 status[0] = 0xff;
406 status[1] = 0xff;
407 status[2] = 0xff;
408 status[3] = 0xff;
409 status[4] = 0xff;
410 status[5] = 0x03;
411
412 return 0;
413 }
414
sun4i_spdif_get_status(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)415 static int sun4i_spdif_get_status(struct snd_kcontrol *kcontrol,
416 struct snd_ctl_elem_value *ucontrol)
417 {
418 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
419 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
420 u8 *status = ucontrol->value.iec958.status;
421 unsigned long flags;
422 unsigned int reg;
423
424 spin_lock_irqsave(&host->lock, flags);
425
426 regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA0, ®);
427
428 status[0] = reg & 0xff;
429 status[1] = (reg >> 8) & 0xff;
430 status[2] = (reg >> 16) & 0xff;
431 status[3] = (reg >> 24) & 0xff;
432
433 regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA1, ®);
434
435 status[4] = reg & 0xff;
436 status[5] = (reg >> 8) & 0x3;
437
438 spin_unlock_irqrestore(&host->lock, flags);
439
440 return 0;
441 }
442
sun4i_spdif_set_status(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)443 static int sun4i_spdif_set_status(struct snd_kcontrol *kcontrol,
444 struct snd_ctl_elem_value *ucontrol)
445 {
446 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
447 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
448 u8 *status = ucontrol->value.iec958.status;
449 unsigned long flags;
450 unsigned int reg;
451 bool chg0, chg1;
452
453 spin_lock_irqsave(&host->lock, flags);
454
455 reg = (u32)status[3] << 24;
456 reg |= (u32)status[2] << 16;
457 reg |= (u32)status[1] << 8;
458 reg |= (u32)status[0];
459
460 regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA0,
461 GENMASK(31,0), reg, &chg0);
462
463 reg = (u32)status[5] << 8;
464 reg |= (u32)status[4];
465
466 regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA1,
467 GENMASK(9,0), reg, &chg1);
468
469 reg = SUN4I_SPDIF_TXCFG_CHSTMODE;
470 if (status[0] & IEC958_AES0_NONAUDIO)
471 reg |= SUN4I_SPDIF_TXCFG_NONAUDIO;
472
473 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
474 SUN4I_SPDIF_TXCFG_CHSTMODE |
475 SUN4I_SPDIF_TXCFG_NONAUDIO, reg);
476
477 spin_unlock_irqrestore(&host->lock, flags);
478
479 return chg0 || chg1;
480 }
481
482 static struct snd_kcontrol_new sun4i_spdif_controls[] = {
483 {
484 .access = SNDRV_CTL_ELEM_ACCESS_READ,
485 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
486 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
487 .info = sun4i_spdif_info,
488 .get = sun4i_spdif_get_status_mask
489 },
490 {
491 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
492 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
493 .info = sun4i_spdif_info,
494 .get = sun4i_spdif_get_status,
495 .put = sun4i_spdif_set_status
496 }
497 };
498
sun4i_spdif_soc_dai_probe(struct snd_soc_dai * dai)499 static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai)
500 {
501 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
502
503 snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);
504 snd_soc_add_dai_controls(dai, sun4i_spdif_controls,
505 ARRAY_SIZE(sun4i_spdif_controls));
506
507 return 0;
508 }
509
510 static const struct snd_soc_dai_ops sun4i_spdif_dai_ops = {
511 .startup = sun4i_spdif_startup,
512 .trigger = sun4i_spdif_trigger,
513 .hw_params = sun4i_spdif_hw_params,
514 };
515
516 static const struct regmap_config sun4i_spdif_regmap_config = {
517 .reg_bits = 32,
518 .reg_stride = 4,
519 .val_bits = 32,
520 .max_register = SUN4I_SPDIF_RXCHSTA1,
521 };
522
523 #define SUN4I_RATES SNDRV_PCM_RATE_8000_192000
524
525 #define SUN4I_FORMATS (SNDRV_PCM_FORMAT_S16_LE | \
526 SNDRV_PCM_FORMAT_S20_3LE | \
527 SNDRV_PCM_FORMAT_S24_LE)
528
529 static struct snd_soc_dai_driver sun4i_spdif_dai = {
530 .playback = {
531 .channels_min = 1,
532 .channels_max = 2,
533 .rates = SUN4I_RATES,
534 .formats = SUN4I_FORMATS,
535 },
536 .probe = sun4i_spdif_soc_dai_probe,
537 .ops = &sun4i_spdif_dai_ops,
538 .name = "spdif",
539 };
540
541 static const struct sun4i_spdif_quirks sun4i_a10_spdif_quirks = {
542 .reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
543 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
544 };
545
546 static const struct sun4i_spdif_quirks sun6i_a31_spdif_quirks = {
547 .reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
548 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
549 .has_reset = true,
550 };
551
552 static const struct sun4i_spdif_quirks sun8i_h3_spdif_quirks = {
553 .reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
554 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
555 .has_reset = true,
556 };
557
558 static const struct sun4i_spdif_quirks sun50i_h6_spdif_quirks = {
559 .reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
560 .val_fctl_ftx = SUN50I_H6_SPDIF_FCTL_FTX,
561 .has_reset = true,
562 };
563
564 static const struct of_device_id sun4i_spdif_of_match[] = {
565 {
566 .compatible = "allwinner,sun4i-a10-spdif",
567 .data = &sun4i_a10_spdif_quirks,
568 },
569 {
570 .compatible = "allwinner,sun6i-a31-spdif",
571 .data = &sun6i_a31_spdif_quirks,
572 },
573 {
574 .compatible = "allwinner,sun8i-h3-spdif",
575 .data = &sun8i_h3_spdif_quirks,
576 },
577 {
578 .compatible = "allwinner,sun50i-h6-spdif",
579 .data = &sun50i_h6_spdif_quirks,
580 },
581 { /* sentinel */ }
582 };
583 MODULE_DEVICE_TABLE(of, sun4i_spdif_of_match);
584
585 static const struct snd_soc_component_driver sun4i_spdif_component = {
586 .name = "sun4i-spdif",
587 .legacy_dai_naming = 1,
588 };
589
sun4i_spdif_runtime_suspend(struct device * dev)590 static int sun4i_spdif_runtime_suspend(struct device *dev)
591 {
592 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
593
594 clk_disable_unprepare(host->spdif_clk);
595 clk_disable_unprepare(host->apb_clk);
596
597 return 0;
598 }
599
sun4i_spdif_runtime_resume(struct device * dev)600 static int sun4i_spdif_runtime_resume(struct device *dev)
601 {
602 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
603 int ret;
604
605 ret = clk_prepare_enable(host->spdif_clk);
606 if (ret)
607 return ret;
608 ret = clk_prepare_enable(host->apb_clk);
609 if (ret)
610 clk_disable_unprepare(host->spdif_clk);
611
612 return ret;
613 }
614
sun4i_spdif_probe(struct platform_device * pdev)615 static int sun4i_spdif_probe(struct platform_device *pdev)
616 {
617 struct sun4i_spdif_dev *host;
618 struct resource *res;
619 const struct sun4i_spdif_quirks *quirks;
620 int ret;
621 void __iomem *base;
622
623 dev_dbg(&pdev->dev, "Entered %s\n", __func__);
624
625 host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
626 if (!host)
627 return -ENOMEM;
628
629 host->pdev = pdev;
630 spin_lock_init(&host->lock);
631
632 /* Initialize this copy of the CPU DAI driver structure */
633 memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));
634 host->cpu_dai_drv.name = dev_name(&pdev->dev);
635
636 /* Get the addresses */
637 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
638 if (IS_ERR(base))
639 return PTR_ERR(base);
640
641 quirks = of_device_get_match_data(&pdev->dev);
642 if (quirks == NULL) {
643 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
644 return -ENODEV;
645 }
646 host->quirks = quirks;
647
648 host->regmap = devm_regmap_init_mmio(&pdev->dev, base,
649 &sun4i_spdif_regmap_config);
650
651 /* Clocks */
652 host->apb_clk = devm_clk_get(&pdev->dev, "apb");
653 if (IS_ERR(host->apb_clk)) {
654 dev_err(&pdev->dev, "failed to get a apb clock.\n");
655 return PTR_ERR(host->apb_clk);
656 }
657
658 host->spdif_clk = devm_clk_get(&pdev->dev, "spdif");
659 if (IS_ERR(host->spdif_clk)) {
660 dev_err(&pdev->dev, "failed to get a spdif clock.\n");
661 return PTR_ERR(host->spdif_clk);
662 }
663
664 host->dma_params_tx.addr = res->start + quirks->reg_dac_txdata;
665 host->dma_params_tx.maxburst = 8;
666 host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
667
668 platform_set_drvdata(pdev, host);
669
670 if (quirks->has_reset) {
671 host->rst = devm_reset_control_get_optional_exclusive(&pdev->dev,
672 NULL);
673 if (PTR_ERR(host->rst) == -EPROBE_DEFER) {
674 ret = -EPROBE_DEFER;
675 dev_err(&pdev->dev, "Failed to get reset: %d\n", ret);
676 return ret;
677 }
678 if (!IS_ERR(host->rst))
679 reset_control_deassert(host->rst);
680 }
681
682 ret = devm_snd_soc_register_component(&pdev->dev,
683 &sun4i_spdif_component, &sun4i_spdif_dai, 1);
684 if (ret)
685 return ret;
686
687 pm_runtime_enable(&pdev->dev);
688 if (!pm_runtime_enabled(&pdev->dev)) {
689 ret = sun4i_spdif_runtime_resume(&pdev->dev);
690 if (ret)
691 goto err_unregister;
692 }
693
694 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
695 if (ret)
696 goto err_suspend;
697 return 0;
698 err_suspend:
699 if (!pm_runtime_status_suspended(&pdev->dev))
700 sun4i_spdif_runtime_suspend(&pdev->dev);
701 err_unregister:
702 pm_runtime_disable(&pdev->dev);
703 return ret;
704 }
705
sun4i_spdif_remove(struct platform_device * pdev)706 static int sun4i_spdif_remove(struct platform_device *pdev)
707 {
708 pm_runtime_disable(&pdev->dev);
709 if (!pm_runtime_status_suspended(&pdev->dev))
710 sun4i_spdif_runtime_suspend(&pdev->dev);
711
712 return 0;
713 }
714
715 static const struct dev_pm_ops sun4i_spdif_pm = {
716 SET_RUNTIME_PM_OPS(sun4i_spdif_runtime_suspend,
717 sun4i_spdif_runtime_resume, NULL)
718 };
719
720 static struct platform_driver sun4i_spdif_driver = {
721 .driver = {
722 .name = "sun4i-spdif",
723 .of_match_table = of_match_ptr(sun4i_spdif_of_match),
724 .pm = &sun4i_spdif_pm,
725 },
726 .probe = sun4i_spdif_probe,
727 .remove = sun4i_spdif_remove,
728 };
729
730 module_platform_driver(sun4i_spdif_driver);
731
732 MODULE_AUTHOR("Marcus Cooper <codekipper@gmail.com>");
733 MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
734 MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface");
735 MODULE_LICENSE("GPL");
736 MODULE_ALIAS("platform:sun4i-spdif");
737