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[mirror_ubuntu-hirsute-kernel.git] / sound / soc / sunxi / sun4i-i2s.c
1 /*
2 * Copyright (C) 2015 Andrea Venturi
3 * Andrea Venturi <be17068@iperbole.bo.it>
4 *
5 * Copyright (C) 2016 Maxime Ripard
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 */
13
14 #include <linux/clk.h>
15 #include <linux/dmaengine.h>
16 #include <linux/module.h>
17 #include <linux/of_device.h>
18 #include <linux/platform_device.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/regmap.h>
21 #include <linux/reset.h>
22
23 #include <sound/dmaengine_pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dai.h>
27
28 #define SUN4I_I2S_CTRL_REG 0x00
29 #define SUN4I_I2S_CTRL_SDO_EN_MASK GENMASK(11, 8)
30 #define SUN4I_I2S_CTRL_SDO_EN(sdo) BIT(8 + (sdo))
31 #define SUN4I_I2S_CTRL_MODE_MASK BIT(5)
32 #define SUN4I_I2S_CTRL_MODE_SLAVE (1 << 5)
33 #define SUN4I_I2S_CTRL_MODE_MASTER (0 << 5)
34 #define SUN4I_I2S_CTRL_TX_EN BIT(2)
35 #define SUN4I_I2S_CTRL_RX_EN BIT(1)
36 #define SUN4I_I2S_CTRL_GL_EN BIT(0)
37
38 #define SUN4I_I2S_FMT0_REG 0x04
39 #define SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(7)
40 #define SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 7)
41 #define SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 7)
42 #define SUN4I_I2S_FMT0_BCLK_POLARITY_MASK BIT(6)
43 #define SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 6)
44 #define SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 6)
45 #define SUN4I_I2S_FMT0_SR_MASK GENMASK(5, 4)
46 #define SUN4I_I2S_FMT0_SR(sr) ((sr) << 4)
47 #define SUN4I_I2S_FMT0_WSS_MASK GENMASK(3, 2)
48 #define SUN4I_I2S_FMT0_WSS(wss) ((wss) << 2)
49 #define SUN4I_I2S_FMT0_FMT_MASK GENMASK(1, 0)
50 #define SUN4I_I2S_FMT0_FMT_RIGHT_J (2 << 0)
51 #define SUN4I_I2S_FMT0_FMT_LEFT_J (1 << 0)
52 #define SUN4I_I2S_FMT0_FMT_I2S (0 << 0)
53 #define SUN4I_I2S_FMT0_POLARITY_INVERTED (1)
54 #define SUN4I_I2S_FMT0_POLARITY_NORMAL (0)
55
56 #define SUN4I_I2S_FMT1_REG 0x08
57 #define SUN4I_I2S_FIFO_TX_REG 0x0c
58 #define SUN4I_I2S_FIFO_RX_REG 0x10
59
60 #define SUN4I_I2S_FIFO_CTRL_REG 0x14
61 #define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
62 #define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
63 #define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
64 #define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
65 #define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
66 #define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
67
68 #define SUN4I_I2S_FIFO_STA_REG 0x18
69
70 #define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
71 #define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
72 #define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
73
74 #define SUN4I_I2S_INT_STA_REG 0x20
75
76 #define SUN4I_I2S_CLK_DIV_REG 0x24
77 #define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
78 #define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
79 #define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
80 #define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
81 #define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
82
83 #define SUN4I_I2S_RX_CNT_REG 0x28
84 #define SUN4I_I2S_TX_CNT_REG 0x2c
85
86 #define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
87 #define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
88
89 #define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
90 #define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
91
92 #define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
93 #define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
94
95 /* Defines required for sun8i-h3 support */
96 #define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
97 #define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
98
99 #define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
100 #define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
101
102 #define SUN8I_I2S_INT_STA_REG 0x0c
103 #define SUN8I_I2S_FIFO_TX_REG 0x20
104
105 #define SUN8I_I2S_CHAN_CFG_REG 0x30
106 #define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(6, 4)
107 #define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) (chan - 1)
108 #define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(2, 0)
109 #define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
110
111 #define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
112 #define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
113 #define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 11)
114 #define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
115 #define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
116 #define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
117
118 #define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
119 #define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
120
121 /**
122 * struct sun4i_i2s_quirks - Differences between SoC variants.
123 *
124 * @has_reset: SoC needs reset deasserted.
125 * @has_slave_select_bit: SoC has a bit to enable slave mode.
126 * @has_fmt_set_lrck_period: SoC requires lrclk period to be set.
127 * @has_chcfg: tx and rx slot number need to be set.
128 * @has_chsel_tx_chen: SoC requires that the tx channels are enabled.
129 * @has_chsel_offset: SoC uses offset for selecting dai operational mode.
130 * @reg_offset_txdata: offset of the tx fifo.
131 * @sun4i_i2s_regmap: regmap config to use.
132 * @mclk_offset: Value by which mclkdiv needs to be adjusted.
133 * @bclk_offset: Value by which bclkdiv needs to be adjusted.
134 * @fmt_offset: Value by which wss and sr needs to be adjusted.
135 * @field_clkdiv_mclk_en: regmap field to enable mclk output.
136 * @field_fmt_wss: regmap field to set word select size.
137 * @field_fmt_sr: regmap field to set sample resolution.
138 * @field_fmt_bclk: regmap field to set clk polarity.
139 * @field_fmt_lrclk: regmap field to set frame polarity.
140 * @field_fmt_mode: regmap field to set the operational mode.
141 * @field_txchanmap: location of the tx channel mapping register.
142 * @field_rxchanmap: location of the rx channel mapping register.
143 * @field_txchansel: location of the tx channel select bit fields.
144 * @field_rxchansel: location of the rx channel select bit fields.
145 */
146 struct sun4i_i2s_quirks {
147 bool has_reset;
148 bool has_slave_select_bit;
149 bool has_fmt_set_lrck_period;
150 bool has_chcfg;
151 bool has_chsel_tx_chen;
152 bool has_chsel_offset;
153 unsigned int reg_offset_txdata; /* TX FIFO */
154 const struct regmap_config *sun4i_i2s_regmap;
155 unsigned int mclk_offset;
156 unsigned int bclk_offset;
157 unsigned int fmt_offset;
158
159 /* Register fields for i2s */
160 struct reg_field field_clkdiv_mclk_en;
161 struct reg_field field_fmt_wss;
162 struct reg_field field_fmt_sr;
163 struct reg_field field_fmt_bclk;
164 struct reg_field field_fmt_lrclk;
165 struct reg_field field_fmt_mode;
166 struct reg_field field_txchanmap;
167 struct reg_field field_rxchanmap;
168 struct reg_field field_txchansel;
169 struct reg_field field_rxchansel;
170 };
171
172 struct sun4i_i2s {
173 struct clk *bus_clk;
174 struct clk *mod_clk;
175 struct regmap *regmap;
176 struct reset_control *rst;
177
178 unsigned int mclk_freq;
179
180 struct snd_dmaengine_dai_dma_data capture_dma_data;
181 struct snd_dmaengine_dai_dma_data playback_dma_data;
182
183 /* Register fields for i2s */
184 struct regmap_field *field_clkdiv_mclk_en;
185 struct regmap_field *field_fmt_wss;
186 struct regmap_field *field_fmt_sr;
187 struct regmap_field *field_fmt_bclk;
188 struct regmap_field *field_fmt_lrclk;
189 struct regmap_field *field_fmt_mode;
190 struct regmap_field *field_txchanmap;
191 struct regmap_field *field_rxchanmap;
192 struct regmap_field *field_txchansel;
193 struct regmap_field *field_rxchansel;
194
195 const struct sun4i_i2s_quirks *variant;
196 };
197
198 struct sun4i_i2s_clk_div {
199 u8 div;
200 u8 val;
201 };
202
203 static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
204 { .div = 2, .val = 0 },
205 { .div = 4, .val = 1 },
206 { .div = 6, .val = 2 },
207 { .div = 8, .val = 3 },
208 { .div = 12, .val = 4 },
209 { .div = 16, .val = 5 },
210 /* TODO - extend divide ratio supported by newer SoCs */
211 };
212
213 static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
214 { .div = 1, .val = 0 },
215 { .div = 2, .val = 1 },
216 { .div = 4, .val = 2 },
217 { .div = 6, .val = 3 },
218 { .div = 8, .val = 4 },
219 { .div = 12, .val = 5 },
220 { .div = 16, .val = 6 },
221 { .div = 24, .val = 7 },
222 /* TODO - extend divide ratio supported by newer SoCs */
223 };
224
225 static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
226 unsigned int oversample_rate,
227 unsigned int word_size)
228 {
229 int div = oversample_rate / word_size / 2;
230 int i;
231
232 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) {
233 const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
234
235 if (bdiv->div == div)
236 return bdiv->val;
237 }
238
239 return -EINVAL;
240 }
241
242 static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
243 unsigned int oversample_rate,
244 unsigned int module_rate,
245 unsigned int sampling_rate)
246 {
247 int div = module_rate / sampling_rate / oversample_rate;
248 int i;
249
250 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_mclk_div); i++) {
251 const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
252
253 if (mdiv->div == div)
254 return mdiv->val;
255 }
256
257 return -EINVAL;
258 }
259
260 static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
261 static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
262 {
263 int i;
264
265 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
266 if (sun4i_i2s_oversample_rates[i] == oversample)
267 return true;
268
269 return false;
270 }
271
272 static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
273 unsigned int rate,
274 unsigned int word_size)
275 {
276 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
277 unsigned int oversample_rate, clk_rate;
278 int bclk_div, mclk_div;
279 int ret;
280
281 switch (rate) {
282 case 176400:
283 case 88200:
284 case 44100:
285 case 22050:
286 case 11025:
287 clk_rate = 22579200;
288 break;
289
290 case 192000:
291 case 128000:
292 case 96000:
293 case 64000:
294 case 48000:
295 case 32000:
296 case 24000:
297 case 16000:
298 case 12000:
299 case 8000:
300 clk_rate = 24576000;
301 break;
302
303 default:
304 dev_err(dai->dev, "Unsupported sample rate: %u\n", rate);
305 return -EINVAL;
306 }
307
308 ret = clk_set_rate(i2s->mod_clk, clk_rate);
309 if (ret)
310 return ret;
311
312 oversample_rate = i2s->mclk_freq / rate;
313 if (!sun4i_i2s_oversample_is_valid(oversample_rate)) {
314 dev_err(dai->dev, "Unsupported oversample rate: %d\n",
315 oversample_rate);
316 return -EINVAL;
317 }
318
319 bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
320 word_size);
321 if (bclk_div < 0) {
322 dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div);
323 return -EINVAL;
324 }
325
326 mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
327 clk_rate, rate);
328 if (mclk_div < 0) {
329 dev_err(dai->dev, "Unsupported MCLK divider: %d\n", mclk_div);
330 return -EINVAL;
331 }
332
333 /* Adjust the clock division values if needed */
334 bclk_div += i2s->variant->bclk_offset;
335 mclk_div += i2s->variant->mclk_offset;
336
337 regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
338 SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
339 SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
340
341 regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
342
343 /* Set sync period */
344 if (i2s->variant->has_fmt_set_lrck_period)
345 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
346 SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
347 SUN8I_I2S_FMT0_LRCK_PERIOD(32));
348
349 return 0;
350 }
351
352 static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
353 struct snd_pcm_hw_params *params,
354 struct snd_soc_dai *dai)
355 {
356 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
357 int sr, wss, channels;
358 u32 width;
359
360 channels = params_channels(params);
361 if (channels != 2) {
362 dev_err(dai->dev, "Unsupported number of channels: %d\n",
363 channels);
364 return -EINVAL;
365 }
366
367 if (i2s->variant->has_chcfg) {
368 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
369 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
370 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
371 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
372 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
373 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
374 }
375
376 /* Map the channels for playback and capture */
377 regmap_field_write(i2s->field_txchanmap, 0x76543210);
378 regmap_field_write(i2s->field_rxchanmap, 0x00003210);
379
380 /* Configure the channels */
381 regmap_field_write(i2s->field_txchansel,
382 SUN4I_I2S_CHAN_SEL(params_channels(params)));
383
384 regmap_field_write(i2s->field_rxchansel,
385 SUN4I_I2S_CHAN_SEL(params_channels(params)));
386
387 if (i2s->variant->has_chsel_tx_chen)
388 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
389 SUN8I_I2S_TX_CHAN_EN_MASK,
390 SUN8I_I2S_TX_CHAN_EN(channels));
391
392 switch (params_physical_width(params)) {
393 case 16:
394 width = DMA_SLAVE_BUSWIDTH_2_BYTES;
395 break;
396 default:
397 dev_err(dai->dev, "Unsupported physical sample width: %d\n",
398 params_physical_width(params));
399 return -EINVAL;
400 }
401 i2s->playback_dma_data.addr_width = width;
402
403 switch (params_width(params)) {
404 case 16:
405 sr = 0;
406 wss = 0;
407 break;
408
409 default:
410 dev_err(dai->dev, "Unsupported sample width: %d\n",
411 params_width(params));
412 return -EINVAL;
413 }
414
415 regmap_field_write(i2s->field_fmt_wss,
416 wss + i2s->variant->fmt_offset);
417 regmap_field_write(i2s->field_fmt_sr,
418 sr + i2s->variant->fmt_offset);
419
420 return sun4i_i2s_set_clk_rate(dai, params_rate(params),
421 params_width(params));
422 }
423
424 static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
425 {
426 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
427 u32 val;
428 u32 offset = 0;
429 u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
430 u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
431
432 /* DAI Mode */
433 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
434 case SND_SOC_DAIFMT_I2S:
435 val = SUN4I_I2S_FMT0_FMT_I2S;
436 offset = 1;
437 break;
438 case SND_SOC_DAIFMT_LEFT_J:
439 val = SUN4I_I2S_FMT0_FMT_LEFT_J;
440 break;
441 case SND_SOC_DAIFMT_RIGHT_J:
442 val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
443 break;
444 default:
445 dev_err(dai->dev, "Unsupported format: %d\n",
446 fmt & SND_SOC_DAIFMT_FORMAT_MASK);
447 return -EINVAL;
448 }
449
450 if (i2s->variant->has_chsel_offset) {
451 /*
452 * offset being set indicates that we're connected to an i2s
453 * device, however offset is only used on the sun8i block and
454 * i2s shares the same setting with the LJ format. Increment
455 * val so that the bit to value to write is correct.
456 */
457 if (offset > 0)
458 val++;
459 /* blck offset determines whether i2s or LJ */
460 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
461 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
462 SUN8I_I2S_TX_CHAN_OFFSET(offset));
463 }
464
465 regmap_field_write(i2s->field_fmt_mode, val);
466
467 /* DAI clock polarity */
468 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
469 case SND_SOC_DAIFMT_IB_IF:
470 /* Invert both clocks */
471 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
472 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
473 break;
474 case SND_SOC_DAIFMT_IB_NF:
475 /* Invert bit clock */
476 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
477 break;
478 case SND_SOC_DAIFMT_NB_IF:
479 /* Invert frame clock */
480 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
481 break;
482 case SND_SOC_DAIFMT_NB_NF:
483 break;
484 default:
485 dev_err(dai->dev, "Unsupported clock polarity: %d\n",
486 fmt & SND_SOC_DAIFMT_INV_MASK);
487 return -EINVAL;
488 }
489
490 regmap_field_write(i2s->field_fmt_bclk, bclk_polarity);
491 regmap_field_write(i2s->field_fmt_lrclk, lrclk_polarity);
492
493 if (i2s->variant->has_slave_select_bit) {
494 /* DAI clock master masks */
495 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
496 case SND_SOC_DAIFMT_CBS_CFS:
497 /* BCLK and LRCLK master */
498 val = SUN4I_I2S_CTRL_MODE_MASTER;
499 break;
500 case SND_SOC_DAIFMT_CBM_CFM:
501 /* BCLK and LRCLK slave */
502 val = SUN4I_I2S_CTRL_MODE_SLAVE;
503 break;
504 default:
505 dev_err(dai->dev, "Unsupported slave setting: %d\n",
506 fmt & SND_SOC_DAIFMT_MASTER_MASK);
507 return -EINVAL;
508 }
509 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
510 SUN4I_I2S_CTRL_MODE_MASK,
511 val);
512 } else {
513 /*
514 * The newer i2s block does not have a slave select bit,
515 * instead the clk pins are configured as inputs.
516 */
517 /* DAI clock master masks */
518 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
519 case SND_SOC_DAIFMT_CBS_CFS:
520 /* BCLK and LRCLK master */
521 val = SUN8I_I2S_CTRL_BCLK_OUT |
522 SUN8I_I2S_CTRL_LRCK_OUT;
523 break;
524 case SND_SOC_DAIFMT_CBM_CFM:
525 /* BCLK and LRCLK slave */
526 val = 0;
527 break;
528 default:
529 dev_err(dai->dev, "Unsupported slave setting: %d\n",
530 fmt & SND_SOC_DAIFMT_MASTER_MASK);
531 return -EINVAL;
532 }
533 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
534 SUN8I_I2S_CTRL_BCLK_OUT |
535 SUN8I_I2S_CTRL_LRCK_OUT,
536 val);
537 }
538
539 /* Set significant bits in our FIFOs */
540 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
541 SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
542 SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
543 SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
544 SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
545 return 0;
546 }
547
548 static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
549 {
550 /* Flush RX FIFO */
551 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
552 SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
553 SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
554
555 /* Clear RX counter */
556 regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
557
558 /* Enable RX Block */
559 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
560 SUN4I_I2S_CTRL_RX_EN,
561 SUN4I_I2S_CTRL_RX_EN);
562
563 /* Enable RX DRQ */
564 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
565 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
566 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
567 }
568
569 static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
570 {
571 /* Flush TX FIFO */
572 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
573 SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
574 SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
575
576 /* Clear TX counter */
577 regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
578
579 /* Enable TX Block */
580 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
581 SUN4I_I2S_CTRL_TX_EN,
582 SUN4I_I2S_CTRL_TX_EN);
583
584 /* Enable TX DRQ */
585 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
586 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
587 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
588 }
589
590 static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
591 {
592 /* Disable RX Block */
593 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
594 SUN4I_I2S_CTRL_RX_EN,
595 0);
596
597 /* Disable RX DRQ */
598 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
599 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
600 0);
601 }
602
603 static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
604 {
605 /* Disable TX Block */
606 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
607 SUN4I_I2S_CTRL_TX_EN,
608 0);
609
610 /* Disable TX DRQ */
611 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
612 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
613 0);
614 }
615
616 static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
617 struct snd_soc_dai *dai)
618 {
619 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
620
621 switch (cmd) {
622 case SNDRV_PCM_TRIGGER_START:
623 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
624 case SNDRV_PCM_TRIGGER_RESUME:
625 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
626 sun4i_i2s_start_playback(i2s);
627 else
628 sun4i_i2s_start_capture(i2s);
629 break;
630
631 case SNDRV_PCM_TRIGGER_STOP:
632 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
633 case SNDRV_PCM_TRIGGER_SUSPEND:
634 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
635 sun4i_i2s_stop_playback(i2s);
636 else
637 sun4i_i2s_stop_capture(i2s);
638 break;
639
640 default:
641 return -EINVAL;
642 }
643
644 return 0;
645 }
646
647 static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
648 struct snd_soc_dai *dai)
649 {
650 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
651
652 /* Enable the whole hardware block */
653 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
654 SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
655
656 /* Enable the first output line */
657 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
658 SUN4I_I2S_CTRL_SDO_EN_MASK,
659 SUN4I_I2S_CTRL_SDO_EN(0));
660
661
662 return clk_prepare_enable(i2s->mod_clk);
663 }
664
665 static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
666 struct snd_soc_dai *dai)
667 {
668 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
669
670 clk_disable_unprepare(i2s->mod_clk);
671
672 /* Disable our output lines */
673 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
674 SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
675
676 /* Disable the whole hardware block */
677 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
678 SUN4I_I2S_CTRL_GL_EN, 0);
679 }
680
681 static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
682 unsigned int freq, int dir)
683 {
684 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
685
686 if (clk_id != 0)
687 return -EINVAL;
688
689 i2s->mclk_freq = freq;
690
691 return 0;
692 }
693
694 static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
695 .hw_params = sun4i_i2s_hw_params,
696 .set_fmt = sun4i_i2s_set_fmt,
697 .set_sysclk = sun4i_i2s_set_sysclk,
698 .shutdown = sun4i_i2s_shutdown,
699 .startup = sun4i_i2s_startup,
700 .trigger = sun4i_i2s_trigger,
701 };
702
703 static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
704 {
705 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
706
707 snd_soc_dai_init_dma_data(dai,
708 &i2s->playback_dma_data,
709 &i2s->capture_dma_data);
710
711 snd_soc_dai_set_drvdata(dai, i2s);
712
713 return 0;
714 }
715
716 static struct snd_soc_dai_driver sun4i_i2s_dai = {
717 .probe = sun4i_i2s_dai_probe,
718 .capture = {
719 .stream_name = "Capture",
720 .channels_min = 2,
721 .channels_max = 2,
722 .rates = SNDRV_PCM_RATE_8000_192000,
723 .formats = SNDRV_PCM_FMTBIT_S16_LE,
724 },
725 .playback = {
726 .stream_name = "Playback",
727 .channels_min = 2,
728 .channels_max = 2,
729 .rates = SNDRV_PCM_RATE_8000_192000,
730 .formats = SNDRV_PCM_FMTBIT_S16_LE,
731 },
732 .ops = &sun4i_i2s_dai_ops,
733 .symmetric_rates = 1,
734 };
735
736 static const struct snd_soc_component_driver sun4i_i2s_component = {
737 .name = "sun4i-dai",
738 };
739
740 static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
741 {
742 switch (reg) {
743 case SUN4I_I2S_FIFO_TX_REG:
744 return false;
745
746 default:
747 return true;
748 }
749 }
750
751 static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
752 {
753 switch (reg) {
754 case SUN4I_I2S_FIFO_RX_REG:
755 case SUN4I_I2S_FIFO_STA_REG:
756 return false;
757
758 default:
759 return true;
760 }
761 }
762
763 static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
764 {
765 switch (reg) {
766 case SUN4I_I2S_FIFO_RX_REG:
767 case SUN4I_I2S_INT_STA_REG:
768 case SUN4I_I2S_RX_CNT_REG:
769 case SUN4I_I2S_TX_CNT_REG:
770 return true;
771
772 default:
773 return false;
774 }
775 }
776
777 static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
778 {
779 switch (reg) {
780 case SUN8I_I2S_FIFO_TX_REG:
781 return false;
782
783 default:
784 return true;
785 }
786 }
787
788 static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
789 {
790 if (reg == SUN8I_I2S_INT_STA_REG)
791 return true;
792 if (reg == SUN8I_I2S_FIFO_TX_REG)
793 return false;
794
795 return sun4i_i2s_volatile_reg(dev, reg);
796 }
797
798 static const struct reg_default sun4i_i2s_reg_defaults[] = {
799 { SUN4I_I2S_CTRL_REG, 0x00000000 },
800 { SUN4I_I2S_FMT0_REG, 0x0000000c },
801 { SUN4I_I2S_FMT1_REG, 0x00004020 },
802 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
803 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
804 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
805 { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
806 { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
807 { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
808 { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
809 };
810
811 static const struct reg_default sun8i_i2s_reg_defaults[] = {
812 { SUN4I_I2S_CTRL_REG, 0x00060000 },
813 { SUN4I_I2S_FMT0_REG, 0x00000033 },
814 { SUN4I_I2S_FMT1_REG, 0x00000030 },
815 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
816 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
817 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
818 { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
819 { SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
820 { SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
821 { SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
822 { SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
823 };
824
825 static const struct regmap_config sun4i_i2s_regmap_config = {
826 .reg_bits = 32,
827 .reg_stride = 4,
828 .val_bits = 32,
829 .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
830
831 .cache_type = REGCACHE_FLAT,
832 .reg_defaults = sun4i_i2s_reg_defaults,
833 .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
834 .writeable_reg = sun4i_i2s_wr_reg,
835 .readable_reg = sun4i_i2s_rd_reg,
836 .volatile_reg = sun4i_i2s_volatile_reg,
837 };
838
839 static const struct regmap_config sun8i_i2s_regmap_config = {
840 .reg_bits = 32,
841 .reg_stride = 4,
842 .val_bits = 32,
843 .max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
844 .cache_type = REGCACHE_FLAT,
845 .reg_defaults = sun8i_i2s_reg_defaults,
846 .num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
847 .writeable_reg = sun4i_i2s_wr_reg,
848 .readable_reg = sun8i_i2s_rd_reg,
849 .volatile_reg = sun8i_i2s_volatile_reg,
850 };
851
852 static int sun4i_i2s_runtime_resume(struct device *dev)
853 {
854 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
855 int ret;
856
857 ret = clk_prepare_enable(i2s->bus_clk);
858 if (ret) {
859 dev_err(dev, "Failed to enable bus clock\n");
860 return ret;
861 }
862
863 regcache_cache_only(i2s->regmap, false);
864 regcache_mark_dirty(i2s->regmap);
865
866 ret = regcache_sync(i2s->regmap);
867 if (ret) {
868 dev_err(dev, "Failed to sync regmap cache\n");
869 goto err_disable_clk;
870 }
871
872 return 0;
873
874 err_disable_clk:
875 clk_disable_unprepare(i2s->bus_clk);
876 return ret;
877 }
878
879 static int sun4i_i2s_runtime_suspend(struct device *dev)
880 {
881 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
882
883 regcache_cache_only(i2s->regmap, true);
884
885 clk_disable_unprepare(i2s->bus_clk);
886
887 return 0;
888 }
889
890 static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
891 .has_reset = false,
892 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
893 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
894 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
895 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
896 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
897 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
898 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
899 .has_slave_select_bit = true,
900 .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
901 .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
902 .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
903 .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
904 .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
905 };
906
907 static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
908 .has_reset = true,
909 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
910 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
911 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
912 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
913 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
914 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
915 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
916 .has_slave_select_bit = true,
917 .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
918 .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
919 .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
920 .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
921 .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
922 };
923
924 static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
925 .has_reset = true,
926 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
927 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
928 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
929 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
930 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
931 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
932 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
933 .has_slave_select_bit = true,
934 .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
935 .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
936 .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
937 .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
938 .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
939 };
940
941 static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
942 .has_reset = true,
943 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
944 .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
945 .mclk_offset = 1,
946 .bclk_offset = 2,
947 .fmt_offset = 3,
948 .has_fmt_set_lrck_period = true,
949 .has_chcfg = true,
950 .has_chsel_tx_chen = true,
951 .has_chsel_offset = true,
952 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
953 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
954 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
955 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
956 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
957 .field_fmt_mode = REG_FIELD(SUN4I_I2S_CTRL_REG, 4, 5),
958 .field_txchanmap = REG_FIELD(SUN8I_I2S_TX_CHAN_MAP_REG, 0, 31),
959 .field_rxchanmap = REG_FIELD(SUN8I_I2S_RX_CHAN_MAP_REG, 0, 31),
960 .field_txchansel = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 0, 2),
961 .field_rxchansel = REG_FIELD(SUN8I_I2S_RX_CHAN_SEL_REG, 0, 2),
962 };
963
964 static int sun4i_i2s_init_regmap_fields(struct device *dev,
965 struct sun4i_i2s *i2s)
966 {
967 i2s->field_clkdiv_mclk_en =
968 devm_regmap_field_alloc(dev, i2s->regmap,
969 i2s->variant->field_clkdiv_mclk_en);
970 if (IS_ERR(i2s->field_clkdiv_mclk_en))
971 return PTR_ERR(i2s->field_clkdiv_mclk_en);
972
973 i2s->field_fmt_wss =
974 devm_regmap_field_alloc(dev, i2s->regmap,
975 i2s->variant->field_fmt_wss);
976 if (IS_ERR(i2s->field_fmt_wss))
977 return PTR_ERR(i2s->field_fmt_wss);
978
979 i2s->field_fmt_sr =
980 devm_regmap_field_alloc(dev, i2s->regmap,
981 i2s->variant->field_fmt_sr);
982 if (IS_ERR(i2s->field_fmt_sr))
983 return PTR_ERR(i2s->field_fmt_sr);
984
985 i2s->field_fmt_bclk =
986 devm_regmap_field_alloc(dev, i2s->regmap,
987 i2s->variant->field_fmt_bclk);
988 if (IS_ERR(i2s->field_fmt_bclk))
989 return PTR_ERR(i2s->field_fmt_bclk);
990
991 i2s->field_fmt_lrclk =
992 devm_regmap_field_alloc(dev, i2s->regmap,
993 i2s->variant->field_fmt_lrclk);
994 if (IS_ERR(i2s->field_fmt_lrclk))
995 return PTR_ERR(i2s->field_fmt_lrclk);
996
997 i2s->field_fmt_mode =
998 devm_regmap_field_alloc(dev, i2s->regmap,
999 i2s->variant->field_fmt_mode);
1000 if (IS_ERR(i2s->field_fmt_mode))
1001 return PTR_ERR(i2s->field_fmt_mode);
1002
1003 i2s->field_txchanmap =
1004 devm_regmap_field_alloc(dev, i2s->regmap,
1005 i2s->variant->field_txchanmap);
1006 if (IS_ERR(i2s->field_txchanmap))
1007 return PTR_ERR(i2s->field_txchanmap);
1008
1009 i2s->field_rxchanmap =
1010 devm_regmap_field_alloc(dev, i2s->regmap,
1011 i2s->variant->field_rxchanmap);
1012 if (IS_ERR(i2s->field_rxchanmap))
1013 return PTR_ERR(i2s->field_rxchanmap);
1014
1015 i2s->field_txchansel =
1016 devm_regmap_field_alloc(dev, i2s->regmap,
1017 i2s->variant->field_txchansel);
1018 if (IS_ERR(i2s->field_txchansel))
1019 return PTR_ERR(i2s->field_txchansel);
1020
1021 i2s->field_rxchansel =
1022 devm_regmap_field_alloc(dev, i2s->regmap,
1023 i2s->variant->field_rxchansel);
1024 return PTR_ERR_OR_ZERO(i2s->field_rxchansel);
1025 }
1026
1027 static int sun4i_i2s_probe(struct platform_device *pdev)
1028 {
1029 struct sun4i_i2s *i2s;
1030 struct resource *res;
1031 void __iomem *regs;
1032 int irq, ret;
1033
1034 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
1035 if (!i2s)
1036 return -ENOMEM;
1037 platform_set_drvdata(pdev, i2s);
1038
1039 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1040 regs = devm_ioremap_resource(&pdev->dev, res);
1041 if (IS_ERR(regs))
1042 return PTR_ERR(regs);
1043
1044 irq = platform_get_irq(pdev, 0);
1045 if (irq < 0) {
1046 dev_err(&pdev->dev, "Can't retrieve our interrupt\n");
1047 return irq;
1048 }
1049
1050 i2s->variant = of_device_get_match_data(&pdev->dev);
1051 if (!i2s->variant) {
1052 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
1053 return -ENODEV;
1054 }
1055
1056 i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
1057 if (IS_ERR(i2s->bus_clk)) {
1058 dev_err(&pdev->dev, "Can't get our bus clock\n");
1059 return PTR_ERR(i2s->bus_clk);
1060 }
1061
1062 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
1063 i2s->variant->sun4i_i2s_regmap);
1064 if (IS_ERR(i2s->regmap)) {
1065 dev_err(&pdev->dev, "Regmap initialisation failed\n");
1066 return PTR_ERR(i2s->regmap);
1067 }
1068
1069 i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
1070 if (IS_ERR(i2s->mod_clk)) {
1071 dev_err(&pdev->dev, "Can't get our mod clock\n");
1072 return PTR_ERR(i2s->mod_clk);
1073 }
1074
1075 if (i2s->variant->has_reset) {
1076 i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
1077 if (IS_ERR(i2s->rst)) {
1078 dev_err(&pdev->dev, "Failed to get reset control\n");
1079 return PTR_ERR(i2s->rst);
1080 }
1081 }
1082
1083 if (!IS_ERR(i2s->rst)) {
1084 ret = reset_control_deassert(i2s->rst);
1085 if (ret) {
1086 dev_err(&pdev->dev,
1087 "Failed to deassert the reset control\n");
1088 return -EINVAL;
1089 }
1090 }
1091
1092 i2s->playback_dma_data.addr = res->start +
1093 i2s->variant->reg_offset_txdata;
1094 i2s->playback_dma_data.maxburst = 8;
1095
1096 i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
1097 i2s->capture_dma_data.maxburst = 8;
1098
1099 pm_runtime_enable(&pdev->dev);
1100 if (!pm_runtime_enabled(&pdev->dev)) {
1101 ret = sun4i_i2s_runtime_resume(&pdev->dev);
1102 if (ret)
1103 goto err_pm_disable;
1104 }
1105
1106 ret = devm_snd_soc_register_component(&pdev->dev,
1107 &sun4i_i2s_component,
1108 &sun4i_i2s_dai, 1);
1109 if (ret) {
1110 dev_err(&pdev->dev, "Could not register DAI\n");
1111 goto err_suspend;
1112 }
1113
1114 ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1115 if (ret) {
1116 dev_err(&pdev->dev, "Could not register PCM\n");
1117 goto err_suspend;
1118 }
1119
1120 ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
1121 if (ret) {
1122 dev_err(&pdev->dev, "Could not initialise regmap fields\n");
1123 goto err_suspend;
1124 }
1125
1126 return 0;
1127
1128 err_suspend:
1129 if (!pm_runtime_status_suspended(&pdev->dev))
1130 sun4i_i2s_runtime_suspend(&pdev->dev);
1131 err_pm_disable:
1132 pm_runtime_disable(&pdev->dev);
1133 if (!IS_ERR(i2s->rst))
1134 reset_control_assert(i2s->rst);
1135
1136 return ret;
1137 }
1138
1139 static int sun4i_i2s_remove(struct platform_device *pdev)
1140 {
1141 struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
1142
1143 snd_dmaengine_pcm_unregister(&pdev->dev);
1144
1145 pm_runtime_disable(&pdev->dev);
1146 if (!pm_runtime_status_suspended(&pdev->dev))
1147 sun4i_i2s_runtime_suspend(&pdev->dev);
1148
1149 if (!IS_ERR(i2s->rst))
1150 reset_control_assert(i2s->rst);
1151
1152 return 0;
1153 }
1154
1155 static const struct of_device_id sun4i_i2s_match[] = {
1156 {
1157 .compatible = "allwinner,sun4i-a10-i2s",
1158 .data = &sun4i_a10_i2s_quirks,
1159 },
1160 {
1161 .compatible = "allwinner,sun6i-a31-i2s",
1162 .data = &sun6i_a31_i2s_quirks,
1163 },
1164 {
1165 .compatible = "allwinner,sun8i-a83t-i2s",
1166 .data = &sun8i_a83t_i2s_quirks,
1167 },
1168 {
1169 .compatible = "allwinner,sun8i-h3-i2s",
1170 .data = &sun8i_h3_i2s_quirks,
1171 },
1172 {}
1173 };
1174 MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
1175
1176 static const struct dev_pm_ops sun4i_i2s_pm_ops = {
1177 .runtime_resume = sun4i_i2s_runtime_resume,
1178 .runtime_suspend = sun4i_i2s_runtime_suspend,
1179 };
1180
1181 static struct platform_driver sun4i_i2s_driver = {
1182 .probe = sun4i_i2s_probe,
1183 .remove = sun4i_i2s_remove,
1184 .driver = {
1185 .name = "sun4i-i2s",
1186 .of_match_table = sun4i_i2s_match,
1187 .pm = &sun4i_i2s_pm_ops,
1188 },
1189 };
1190 module_platform_driver(sun4i_i2s_driver);
1191
1192 MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
1193 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
1194 MODULE_DESCRIPTION("Allwinner A10 I2S driver");
1195 MODULE_LICENSE("GPL");
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