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.h>
18 #include <linux/ioport.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/reset.h>
23 #include <linux/spinlock.h>
24 #include <sound/asoundef.h>
25 #include <sound/dmaengine_pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28
29 #define SUN4I_SPDIF_CTL (0x00)
30 #define SUN4I_SPDIF_CTL_MCLKDIV(v) ((v) << 4) /* v even */
31 #define SUN4I_SPDIF_CTL_MCLKOUTEN BIT(2)
32 #define SUN4I_SPDIF_CTL_GEN BIT(1)
33 #define SUN4I_SPDIF_CTL_RESET BIT(0)
34
35 #define SUN4I_SPDIF_TXCFG (0x04)
36 #define SUN4I_SPDIF_TXCFG_SINGLEMOD BIT(31)
37 #define SUN4I_SPDIF_TXCFG_ASS BIT(17)
38 #define SUN4I_SPDIF_TXCFG_NONAUDIO BIT(16)
39 #define SUN4I_SPDIF_TXCFG_TXRATIO(v) ((v) << 4)
40 #define SUN4I_SPDIF_TXCFG_TXRATIO_MASK GENMASK(8, 4)
41 #define SUN4I_SPDIF_TXCFG_FMTRVD GENMASK(3, 2)
42 #define SUN4I_SPDIF_TXCFG_FMT16BIT (0 << 2)
43 #define SUN4I_SPDIF_TXCFG_FMT20BIT (1 << 2)
44 #define SUN4I_SPDIF_TXCFG_FMT24BIT (2 << 2)
45 #define SUN4I_SPDIF_TXCFG_CHSTMODE BIT(1)
46 #define SUN4I_SPDIF_TXCFG_TXEN BIT(0)
47
48 #define SUN4I_SPDIF_RXCFG (0x08)
49 #define SUN4I_SPDIF_RXCFG_LOCKFLAG BIT(4)
50 #define SUN4I_SPDIF_RXCFG_CHSTSRC BIT(3)
51 #define SUN4I_SPDIF_RXCFG_CHSTCP BIT(1)
52 #define SUN4I_SPDIF_RXCFG_RXEN BIT(0)
53
54 #define SUN4I_SPDIF_TXFIFO (0x0C)
55
56 #define SUN4I_SPDIF_RXFIFO (0x10)
57
58 #define SUN4I_SPDIF_FCTL (0x14)
59 #define SUN4I_SPDIF_FCTL_FIFOSRC BIT(31)
60 #define SUN4I_SPDIF_FCTL_FTX BIT(17)
61 #define SUN4I_SPDIF_FCTL_FRX BIT(16)
62 #define SUN4I_SPDIF_FCTL_TXTL(v) ((v) << 8)
63 #define SUN4I_SPDIF_FCTL_TXTL_MASK GENMASK(12, 8)
64 #define SUN4I_SPDIF_FCTL_RXTL(v) ((v) << 3)
65 #define SUN4I_SPDIF_FCTL_RXTL_MASK GENMASK(7, 3)
66 #define SUN4I_SPDIF_FCTL_TXIM BIT(2)
67 #define SUN4I_SPDIF_FCTL_RXOM(v) ((v) << 0)
68 #define SUN4I_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
69
70 #define SUN50I_H6_SPDIF_FCTL (0x14)
71 #define SUN50I_H6_SPDIF_FCTL_HUB_EN BIT(31)
72 #define SUN50I_H6_SPDIF_FCTL_FTX BIT(30)
73 #define SUN50I_H6_SPDIF_FCTL_FRX BIT(29)
74 #define SUN50I_H6_SPDIF_FCTL_TXTL(v) ((v) << 12)
75 #define SUN50I_H6_SPDIF_FCTL_TXTL_MASK GENMASK(19, 12)
76 #define SUN50I_H6_SPDIF_FCTL_RXTL(v) ((v) << 4)
77 #define SUN50I_H6_SPDIF_FCTL_RXTL_MASK GENMASK(10, 4)
78 #define SUN50I_H6_SPDIF_FCTL_TXIM BIT(2)
79 #define SUN50I_H6_SPDIF_FCTL_RXOM(v) ((v) << 0)
80 #define SUN50I_H6_SPDIF_FCTL_RXOM_MASK GENMASK(1, 0)
81
82 #define SUN4I_SPDIF_FSTA (0x18)
83 #define SUN4I_SPDIF_FSTA_TXE BIT(14)
84 #define SUN4I_SPDIF_FSTA_TXECNTSHT (8)
85 #define SUN4I_SPDIF_FSTA_RXA BIT(6)
86 #define SUN4I_SPDIF_FSTA_RXACNTSHT (0)
87
88 #define SUN4I_SPDIF_INT (0x1C)
89 #define SUN4I_SPDIF_INT_RXLOCKEN BIT(18)
90 #define SUN4I_SPDIF_INT_RXUNLOCKEN BIT(17)
91 #define SUN4I_SPDIF_INT_RXPARERREN BIT(16)
92 #define SUN4I_SPDIF_INT_TXDRQEN BIT(7)
93 #define SUN4I_SPDIF_INT_TXUIEN BIT(6)
94 #define SUN4I_SPDIF_INT_TXOIEN BIT(5)
95 #define SUN4I_SPDIF_INT_TXEIEN BIT(4)
96 #define SUN4I_SPDIF_INT_RXDRQEN BIT(2)
97 #define SUN4I_SPDIF_INT_RXOIEN BIT(1)
98 #define SUN4I_SPDIF_INT_RXAIEN BIT(0)
99
100 #define SUN4I_SPDIF_ISTA (0x20)
101 #define SUN4I_SPDIF_ISTA_RXLOCKSTA BIT(18)
102 #define SUN4I_SPDIF_ISTA_RXUNLOCKSTA BIT(17)
103 #define SUN4I_SPDIF_ISTA_RXPARERRSTA BIT(16)
104 #define SUN4I_SPDIF_ISTA_TXUSTA BIT(6)
105 #define SUN4I_SPDIF_ISTA_TXOSTA BIT(5)
106 #define SUN4I_SPDIF_ISTA_TXESTA BIT(4)
107 #define SUN4I_SPDIF_ISTA_RXOSTA BIT(1)
108 #define SUN4I_SPDIF_ISTA_RXASTA BIT(0)
109
110 #define SUN8I_SPDIF_TXFIFO (0x20)
111
112 #define SUN4I_SPDIF_TXCNT (0x24)
113
114 #define SUN4I_SPDIF_RXCNT (0x28)
115
116 #define SUN4I_SPDIF_TXCHSTA0 (0x2C)
117 #define SUN4I_SPDIF_TXCHSTA0_CLK(v) ((v) << 28)
118 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ(v) ((v) << 24)
119 #define SUN4I_SPDIF_TXCHSTA0_SAMFREQ_MASK GENMASK(27, 24)
120 #define SUN4I_SPDIF_TXCHSTA0_CHNUM(v) ((v) << 20)
121 #define SUN4I_SPDIF_TXCHSTA0_CHNUM_MASK GENMASK(23, 20)
122 #define SUN4I_SPDIF_TXCHSTA0_SRCNUM(v) ((v) << 16)
123 #define SUN4I_SPDIF_TXCHSTA0_CATACOD(v) ((v) << 8)
124 #define SUN4I_SPDIF_TXCHSTA0_MODE(v) ((v) << 6)
125 #define SUN4I_SPDIF_TXCHSTA0_EMPHASIS(v) ((v) << 3)
126 #define SUN4I_SPDIF_TXCHSTA0_CP BIT(2)
127 #define SUN4I_SPDIF_TXCHSTA0_AUDIO BIT(1)
128 #define SUN4I_SPDIF_TXCHSTA0_PRO BIT(0)
129
130 #define SUN4I_SPDIF_TXCHSTA1 (0x30)
131 #define SUN4I_SPDIF_TXCHSTA1_CGMSA(v) ((v) << 8)
132 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ(v) ((v) << 4)
133 #define SUN4I_SPDIF_TXCHSTA1_ORISAMFREQ_MASK GENMASK(7, 4)
134 #define SUN4I_SPDIF_TXCHSTA1_SAMWORDLEN(v) ((v) << 1)
135 #define SUN4I_SPDIF_TXCHSTA1_MAXWORDLEN BIT(0)
136
137 #define SUN4I_SPDIF_RXCHSTA0 (0x34)
138 #define SUN4I_SPDIF_RXCHSTA0_CLK(v) ((v) << 28)
139 #define SUN4I_SPDIF_RXCHSTA0_SAMFREQ(v) ((v) << 24)
140 #define SUN4I_SPDIF_RXCHSTA0_CHNUM(v) ((v) << 20)
141 #define SUN4I_SPDIF_RXCHSTA0_SRCNUM(v) ((v) << 16)
142 #define SUN4I_SPDIF_RXCHSTA0_CATACOD(v) ((v) << 8)
143 #define SUN4I_SPDIF_RXCHSTA0_MODE(v) ((v) << 6)
144 #define SUN4I_SPDIF_RXCHSTA0_EMPHASIS(v) ((v) << 3)
145 #define SUN4I_SPDIF_RXCHSTA0_CP BIT(2)
146 #define SUN4I_SPDIF_RXCHSTA0_AUDIO BIT(1)
147 #define SUN4I_SPDIF_RXCHSTA0_PRO BIT(0)
148
149 #define SUN4I_SPDIF_RXCHSTA1 (0x38)
150 #define SUN4I_SPDIF_RXCHSTA1_CGMSA(v) ((v) << 8)
151 #define SUN4I_SPDIF_RXCHSTA1_ORISAMFREQ(v) ((v) << 4)
152 #define SUN4I_SPDIF_RXCHSTA1_SAMWORDLEN(v) ((v) << 1)
153 #define SUN4I_SPDIF_RXCHSTA1_MAXWORDLEN BIT(0)
154
155 /* Defines for Sampling Frequency */
156 #define SUN4I_SPDIF_SAMFREQ_44_1KHZ 0x0
157 #define SUN4I_SPDIF_SAMFREQ_NOT_INDICATED 0x1
158 #define SUN4I_SPDIF_SAMFREQ_48KHZ 0x2
159 #define SUN4I_SPDIF_SAMFREQ_32KHZ 0x3
160 #define SUN4I_SPDIF_SAMFREQ_22_05KHZ 0x4
161 #define SUN4I_SPDIF_SAMFREQ_24KHZ 0x6
162 #define SUN4I_SPDIF_SAMFREQ_88_2KHZ 0x8
163 #define SUN4I_SPDIF_SAMFREQ_76_8KHZ 0x9
164 #define SUN4I_SPDIF_SAMFREQ_96KHZ 0xa
165 #define SUN4I_SPDIF_SAMFREQ_176_4KHZ 0xc
166 #define SUN4I_SPDIF_SAMFREQ_192KHZ 0xe
167
168 /**
169 * struct sun4i_spdif_quirks - Differences between SoC variants.
170 *
171 * @reg_dac_txdata: TX FIFO offset for DMA config.
172 * @has_reset: SoC needs reset deasserted.
173 * @val_fctl_ftx: TX FIFO flush bitmask.
174 */
175 struct sun4i_spdif_quirks {
176 unsigned int reg_dac_txdata;
177 bool has_reset;
178 unsigned int val_fctl_ftx;
179 };
180
181 struct sun4i_spdif_dev {
182 struct platform_device *pdev;
183 struct clk *spdif_clk;
184 struct clk *apb_clk;
185 struct reset_control *rst;
186 struct snd_soc_dai_driver cpu_dai_drv;
187 struct regmap *regmap;
188 struct snd_dmaengine_dai_dma_data dma_params_tx;
189 const struct sun4i_spdif_quirks *quirks;
190 spinlock_t lock;
191 };
192
sun4i_spdif_configure(struct sun4i_spdif_dev * host)193 static void sun4i_spdif_configure(struct sun4i_spdif_dev *host)
194 {
195 const struct sun4i_spdif_quirks *quirks = host->quirks;
196
197 /* soft reset SPDIF */
198 regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET);
199
200 /* flush TX FIFO */
201 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
202 quirks->val_fctl_ftx, quirks->val_fctl_ftx);
203
204 /* clear TX counter */
205 regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0);
206 }
207
sun4i_snd_txctrl_on(struct snd_pcm_substream * substream,struct sun4i_spdif_dev * host)208 static void sun4i_snd_txctrl_on(struct snd_pcm_substream *substream,
209 struct sun4i_spdif_dev *host)
210 {
211 if (substream->runtime->channels == 1)
212 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
213 SUN4I_SPDIF_TXCFG_SINGLEMOD,
214 SUN4I_SPDIF_TXCFG_SINGLEMOD);
215
216 /* SPDIF TX ENABLE */
217 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
218 SUN4I_SPDIF_TXCFG_TXEN, SUN4I_SPDIF_TXCFG_TXEN);
219
220 /* DRQ ENABLE */
221 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
222 SUN4I_SPDIF_INT_TXDRQEN, SUN4I_SPDIF_INT_TXDRQEN);
223
224 /* Global enable */
225 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
226 SUN4I_SPDIF_CTL_GEN, SUN4I_SPDIF_CTL_GEN);
227 }
228
sun4i_snd_txctrl_off(struct snd_pcm_substream * substream,struct sun4i_spdif_dev * host)229 static void sun4i_snd_txctrl_off(struct snd_pcm_substream *substream,
230 struct sun4i_spdif_dev *host)
231 {
232 /* SPDIF TX DISABLE */
233 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
234 SUN4I_SPDIF_TXCFG_TXEN, 0);
235
236 /* DRQ DISABLE */
237 regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,
238 SUN4I_SPDIF_INT_TXDRQEN, 0);
239
240 /* Global disable */
241 regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,
242 SUN4I_SPDIF_CTL_GEN, 0);
243 }
244
sun4i_spdif_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)245 static int sun4i_spdif_startup(struct snd_pcm_substream *substream,
246 struct snd_soc_dai *cpu_dai)
247 {
248 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
249 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0));
250
251 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
252 return -EINVAL;
253
254 sun4i_spdif_configure(host);
255
256 return 0;
257 }
258
sun4i_spdif_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * cpu_dai)259 static int sun4i_spdif_hw_params(struct snd_pcm_substream *substream,
260 struct snd_pcm_hw_params *params,
261 struct snd_soc_dai *cpu_dai)
262 {
263 int ret = 0;
264 int fmt;
265 unsigned long rate = params_rate(params);
266 u32 mclk_div = 0;
267 unsigned int mclk = 0;
268 u32 reg_val;
269 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
270 struct platform_device *pdev = host->pdev;
271
272 /* Add the PCM and raw data select interface */
273 switch (params_channels(params)) {
274 case 1: /* PCM mode */
275 case 2:
276 fmt = 0;
277 break;
278 case 4: /* raw data mode */
279 fmt = SUN4I_SPDIF_TXCFG_NONAUDIO;
280 break;
281 default:
282 return -EINVAL;
283 }
284
285 switch (params_format(params)) {
286 case SNDRV_PCM_FORMAT_S16_LE:
287 fmt |= SUN4I_SPDIF_TXCFG_FMT16BIT;
288 break;
289 case SNDRV_PCM_FORMAT_S20_3LE:
290 fmt |= SUN4I_SPDIF_TXCFG_FMT20BIT;
291 break;
292 case SNDRV_PCM_FORMAT_S24_LE:
293 fmt |= SUN4I_SPDIF_TXCFG_FMT24BIT;
294 break;
295 default:
296 return -EINVAL;
297 }
298
299 switch (rate) {
300 case 22050:
301 case 44100:
302 case 88200:
303 case 176400:
304 mclk = 22579200;
305 break;
306 case 24000:
307 case 32000:
308 case 48000:
309 case 96000:
310 case 192000:
311 mclk = 24576000;
312 break;
313 default:
314 return -EINVAL;
315 }
316
317 ret = clk_set_rate(host->spdif_clk, mclk);
318 if (ret < 0) {
319 dev_err(&pdev->dev,
320 "Setting SPDIF clock rate for %d Hz failed!\n", mclk);
321 return ret;
322 }
323
324 regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,
325 SUN4I_SPDIF_FCTL_TXIM, SUN4I_SPDIF_FCTL_TXIM);
326
327 switch (rate) {
328 case 22050:
329 case 24000:
330 mclk_div = 8;
331 break;
332 case 32000:
333 mclk_div = 6;
334 break;
335 case 44100:
336 case 48000:
337 mclk_div = 4;
338 break;
339 case 88200:
340 case 96000:
341 mclk_div = 2;
342 break;
343 case 176400:
344 case 192000:
345 mclk_div = 1;
346 break;
347 default:
348 return -EINVAL;
349 }
350
351 reg_val = 0;
352 reg_val |= SUN4I_SPDIF_TXCFG_ASS;
353 reg_val |= fmt; /* set non audio and bit depth */
354 reg_val |= SUN4I_SPDIF_TXCFG_CHSTMODE;
355 reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1);
356 regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val);
357
358 return 0;
359 }
360
sun4i_spdif_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)361 static int sun4i_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
362 struct snd_soc_dai *dai)
363 {
364 int ret = 0;
365 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
366
367 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
368 return -EINVAL;
369
370 switch (cmd) {
371 case SNDRV_PCM_TRIGGER_START:
372 case SNDRV_PCM_TRIGGER_RESUME:
373 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
374 sun4i_snd_txctrl_on(substream, host);
375 break;
376
377 case SNDRV_PCM_TRIGGER_STOP:
378 case SNDRV_PCM_TRIGGER_SUSPEND:
379 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
380 sun4i_snd_txctrl_off(substream, host);
381 break;
382
383 default:
384 ret = -EINVAL;
385 break;
386 }
387 return ret;
388 }
389
sun4i_spdif_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)390 static int sun4i_spdif_info(struct snd_kcontrol *kcontrol,
391 struct snd_ctl_elem_info *uinfo)
392 {
393 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
394 uinfo->count = 1;
395
396 return 0;
397 }
398
sun4i_spdif_get_status_mask(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)399 static int sun4i_spdif_get_status_mask(struct snd_kcontrol *kcontrol,
400 struct snd_ctl_elem_value *ucontrol)
401 {
402 u8 *status = ucontrol->value.iec958.status;
403
404 status[0] = 0xff;
405 status[1] = 0xff;
406 status[2] = 0xff;
407 status[3] = 0xff;
408 status[4] = 0xff;
409 status[5] = 0x03;
410
411 return 0;
412 }
413
sun4i_spdif_get_status(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)414 static int sun4i_spdif_get_status(struct snd_kcontrol *kcontrol,
415 struct snd_ctl_elem_value *ucontrol)
416 {
417 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
418 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
419 u8 *status = ucontrol->value.iec958.status;
420 unsigned long flags;
421 unsigned int reg;
422
423 spin_lock_irqsave(&host->lock, flags);
424
425 regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA0, ®);
426
427 status[0] = reg & 0xff;
428 status[1] = (reg >> 8) & 0xff;
429 status[2] = (reg >> 16) & 0xff;
430 status[3] = (reg >> 24) & 0xff;
431
432 regmap_read(host->regmap, SUN4I_SPDIF_TXCHSTA1, ®);
433
434 status[4] = reg & 0xff;
435 status[5] = (reg >> 8) & 0x3;
436
437 spin_unlock_irqrestore(&host->lock, flags);
438
439 return 0;
440 }
441
sun4i_spdif_set_status(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)442 static int sun4i_spdif_set_status(struct snd_kcontrol *kcontrol,
443 struct snd_ctl_elem_value *ucontrol)
444 {
445 struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
446 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
447 u8 *status = ucontrol->value.iec958.status;
448 unsigned long flags;
449 unsigned int reg;
450 bool chg0, chg1;
451
452 spin_lock_irqsave(&host->lock, flags);
453
454 reg = (u32)status[3] << 24;
455 reg |= (u32)status[2] << 16;
456 reg |= (u32)status[1] << 8;
457 reg |= (u32)status[0];
458
459 regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA0,
460 GENMASK(31,0), reg, &chg0);
461
462 reg = (u32)status[5] << 8;
463 reg |= (u32)status[4];
464
465 regmap_update_bits_check(host->regmap, SUN4I_SPDIF_TXCHSTA1,
466 GENMASK(9,0), reg, &chg1);
467
468 reg = SUN4I_SPDIF_TXCFG_CHSTMODE;
469 if (status[0] & IEC958_AES0_NONAUDIO)
470 reg |= SUN4I_SPDIF_TXCFG_NONAUDIO;
471
472 regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,
473 SUN4I_SPDIF_TXCFG_CHSTMODE |
474 SUN4I_SPDIF_TXCFG_NONAUDIO, reg);
475
476 spin_unlock_irqrestore(&host->lock, flags);
477
478 return chg0 || chg1;
479 }
480
481 static struct snd_kcontrol_new sun4i_spdif_controls[] = {
482 {
483 .access = SNDRV_CTL_ELEM_ACCESS_READ,
484 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
485 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
486 .info = sun4i_spdif_info,
487 .get = sun4i_spdif_get_status_mask
488 },
489 {
490 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
491 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
492 .info = sun4i_spdif_info,
493 .get = sun4i_spdif_get_status,
494 .put = sun4i_spdif_set_status
495 }
496 };
497
sun4i_spdif_soc_dai_probe(struct snd_soc_dai * dai)498 static int sun4i_spdif_soc_dai_probe(struct snd_soc_dai *dai)
499 {
500 struct sun4i_spdif_dev *host = snd_soc_dai_get_drvdata(dai);
501
502 snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);
503 snd_soc_add_dai_controls(dai, sun4i_spdif_controls,
504 ARRAY_SIZE(sun4i_spdif_controls));
505
506 return 0;
507 }
508
509 static const struct snd_soc_dai_ops sun4i_spdif_dai_ops = {
510 .probe = sun4i_spdif_soc_dai_probe,
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 .ops = &sun4i_spdif_dai_ops,
537 .name = "spdif",
538 };
539
540 static const struct sun4i_spdif_quirks sun4i_a10_spdif_quirks = {
541 .reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
542 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
543 };
544
545 static const struct sun4i_spdif_quirks sun6i_a31_spdif_quirks = {
546 .reg_dac_txdata = SUN4I_SPDIF_TXFIFO,
547 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
548 .has_reset = true,
549 };
550
551 static const struct sun4i_spdif_quirks sun8i_h3_spdif_quirks = {
552 .reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
553 .val_fctl_ftx = SUN4I_SPDIF_FCTL_FTX,
554 .has_reset = true,
555 };
556
557 static const struct sun4i_spdif_quirks sun50i_h6_spdif_quirks = {
558 .reg_dac_txdata = SUN8I_SPDIF_TXFIFO,
559 .val_fctl_ftx = SUN50I_H6_SPDIF_FCTL_FTX,
560 .has_reset = true,
561 };
562
563 static const struct of_device_id sun4i_spdif_of_match[] = {
564 {
565 .compatible = "allwinner,sun4i-a10-spdif",
566 .data = &sun4i_a10_spdif_quirks,
567 },
568 {
569 .compatible = "allwinner,sun6i-a31-spdif",
570 .data = &sun6i_a31_spdif_quirks,
571 },
572 {
573 .compatible = "allwinner,sun8i-h3-spdif",
574 .data = &sun8i_h3_spdif_quirks,
575 },
576 {
577 .compatible = "allwinner,sun50i-h6-spdif",
578 .data = &sun50i_h6_spdif_quirks,
579 },
580 {
581 .compatible = "allwinner,sun50i-h616-spdif",
582 /* Essentially the same as the H6, but without RX */
583 .data = &sun50i_h6_spdif_quirks,
584 },
585 { /* sentinel */ }
586 };
587 MODULE_DEVICE_TABLE(of, sun4i_spdif_of_match);
588
589 static const struct snd_soc_component_driver sun4i_spdif_component = {
590 .name = "sun4i-spdif",
591 .legacy_dai_naming = 1,
592 };
593
sun4i_spdif_runtime_suspend(struct device * dev)594 static int sun4i_spdif_runtime_suspend(struct device *dev)
595 {
596 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
597
598 clk_disable_unprepare(host->spdif_clk);
599 clk_disable_unprepare(host->apb_clk);
600
601 return 0;
602 }
603
sun4i_spdif_runtime_resume(struct device * dev)604 static int sun4i_spdif_runtime_resume(struct device *dev)
605 {
606 struct sun4i_spdif_dev *host = dev_get_drvdata(dev);
607 int ret;
608
609 ret = clk_prepare_enable(host->spdif_clk);
610 if (ret)
611 return ret;
612 ret = clk_prepare_enable(host->apb_clk);
613 if (ret)
614 clk_disable_unprepare(host->spdif_clk);
615
616 return ret;
617 }
618
sun4i_spdif_probe(struct platform_device * pdev)619 static int sun4i_spdif_probe(struct platform_device *pdev)
620 {
621 struct sun4i_spdif_dev *host;
622 struct resource *res;
623 const struct sun4i_spdif_quirks *quirks;
624 int ret;
625 void __iomem *base;
626
627 dev_dbg(&pdev->dev, "Entered %s\n", __func__);
628
629 host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
630 if (!host)
631 return -ENOMEM;
632
633 host->pdev = pdev;
634 spin_lock_init(&host->lock);
635
636 /* Initialize this copy of the CPU DAI driver structure */
637 memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));
638 host->cpu_dai_drv.name = dev_name(&pdev->dev);
639
640 /* Get the addresses */
641 base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
642 if (IS_ERR(base))
643 return PTR_ERR(base);
644
645 quirks = of_device_get_match_data(&pdev->dev);
646 if (quirks == NULL) {
647 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
648 return -ENODEV;
649 }
650 host->quirks = quirks;
651
652 host->regmap = devm_regmap_init_mmio(&pdev->dev, base,
653 &sun4i_spdif_regmap_config);
654
655 /* Clocks */
656 host->apb_clk = devm_clk_get(&pdev->dev, "apb");
657 if (IS_ERR(host->apb_clk)) {
658 dev_err(&pdev->dev, "failed to get a apb clock.\n");
659 return PTR_ERR(host->apb_clk);
660 }
661
662 host->spdif_clk = devm_clk_get(&pdev->dev, "spdif");
663 if (IS_ERR(host->spdif_clk)) {
664 dev_err(&pdev->dev, "failed to get a spdif clock.\n");
665 return PTR_ERR(host->spdif_clk);
666 }
667
668 host->dma_params_tx.addr = res->start + quirks->reg_dac_txdata;
669 host->dma_params_tx.maxburst = 8;
670 host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
671
672 platform_set_drvdata(pdev, host);
673
674 if (quirks->has_reset) {
675 host->rst = devm_reset_control_get_optional_exclusive(&pdev->dev,
676 NULL);
677 if (PTR_ERR(host->rst) == -EPROBE_DEFER) {
678 ret = -EPROBE_DEFER;
679 dev_err(&pdev->dev, "Failed to get reset: %d\n", ret);
680 return ret;
681 }
682 if (!IS_ERR(host->rst))
683 reset_control_deassert(host->rst);
684 }
685
686 ret = devm_snd_soc_register_component(&pdev->dev,
687 &sun4i_spdif_component, &sun4i_spdif_dai, 1);
688 if (ret)
689 return ret;
690
691 pm_runtime_enable(&pdev->dev);
692 if (!pm_runtime_enabled(&pdev->dev)) {
693 ret = sun4i_spdif_runtime_resume(&pdev->dev);
694 if (ret)
695 goto err_unregister;
696 }
697
698 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
699 if (ret)
700 goto err_suspend;
701 return 0;
702 err_suspend:
703 if (!pm_runtime_status_suspended(&pdev->dev))
704 sun4i_spdif_runtime_suspend(&pdev->dev);
705 err_unregister:
706 pm_runtime_disable(&pdev->dev);
707 return ret;
708 }
709
sun4i_spdif_remove(struct platform_device * pdev)710 static void sun4i_spdif_remove(struct platform_device *pdev)
711 {
712 pm_runtime_disable(&pdev->dev);
713 if (!pm_runtime_status_suspended(&pdev->dev))
714 sun4i_spdif_runtime_suspend(&pdev->dev);
715 }
716
717 static const struct dev_pm_ops sun4i_spdif_pm = {
718 SET_RUNTIME_PM_OPS(sun4i_spdif_runtime_suspend,
719 sun4i_spdif_runtime_resume, NULL)
720 };
721
722 static struct platform_driver sun4i_spdif_driver = {
723 .driver = {
724 .name = "sun4i-spdif",
725 .of_match_table = sun4i_spdif_of_match,
726 .pm = &sun4i_spdif_pm,
727 },
728 .probe = sun4i_spdif_probe,
729 .remove = sun4i_spdif_remove,
730 };
731
732 module_platform_driver(sun4i_spdif_driver);
733
734 MODULE_AUTHOR("Marcus Cooper <codekipper@gmail.com>");
735 MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
736 MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface");
737 MODULE_LICENSE("GPL");
738 MODULE_ALIAS("platform:sun4i-spdif");
739