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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2015 Andrea Venturi
4 * Andrea Venturi <be17068@iperbole.bo.it>
5 *
6 * Copyright (C) 2016 Maxime Ripard
7 * Maxime Ripard <maxime.ripard@free-electrons.com>
8 */
9
10#include <linux/clk.h>
11#include <linux/dmaengine.h>
12#include <linux/module.h>
13#include <linux/of_device.h>
14#include <linux/platform_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/regmap.h>
17#include <linux/reset.h>
18
19#include <sound/dmaengine_pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include <sound/soc-dai.h>
23
24#define SUN4I_I2S_CTRL_REG 0x00
25#define SUN4I_I2S_CTRL_SDO_EN_MASK GENMASK(11, 8)
26#define SUN4I_I2S_CTRL_SDO_EN(sdo) BIT(8 + (sdo))
27#define SUN4I_I2S_CTRL_MODE_MASK BIT(5)
28#define SUN4I_I2S_CTRL_MODE_SLAVE (1 << 5)
29#define SUN4I_I2S_CTRL_MODE_MASTER (0 << 5)
30#define SUN4I_I2S_CTRL_TX_EN BIT(2)
31#define SUN4I_I2S_CTRL_RX_EN BIT(1)
32#define SUN4I_I2S_CTRL_GL_EN BIT(0)
33
34#define SUN4I_I2S_FMT0_REG 0x04
35#define SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(7)
36#define SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 7)
37#define SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 7)
38#define SUN4I_I2S_FMT0_BCLK_POLARITY_MASK BIT(6)
39#define SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 6)
40#define SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 6)
41#define SUN4I_I2S_FMT0_SR_MASK GENMASK(5, 4)
42#define SUN4I_I2S_FMT0_SR(sr) ((sr) << 4)
43#define SUN4I_I2S_FMT0_WSS_MASK GENMASK(3, 2)
44#define SUN4I_I2S_FMT0_WSS(wss) ((wss) << 2)
45#define SUN4I_I2S_FMT0_FMT_MASK GENMASK(1, 0)
46#define SUN4I_I2S_FMT0_FMT_RIGHT_J (2 << 0)
47#define SUN4I_I2S_FMT0_FMT_LEFT_J (1 << 0)
48#define SUN4I_I2S_FMT0_FMT_I2S (0 << 0)
49
50#define SUN4I_I2S_FMT1_REG 0x08
51#define SUN4I_I2S_FMT1_REG_SEXT_MASK BIT(8)
52#define SUN4I_I2S_FMT1_REG_SEXT(sext) ((sext) << 8)
53
54#define SUN4I_I2S_FIFO_TX_REG 0x0c
55#define SUN4I_I2S_FIFO_RX_REG 0x10
56
57#define SUN4I_I2S_FIFO_CTRL_REG 0x14
58#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
59#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
60#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
61#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
62#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
63#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
64
65#define SUN4I_I2S_FIFO_STA_REG 0x18
66
67#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
68#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
69#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
70
71#define SUN4I_I2S_INT_STA_REG 0x20
72
73#define SUN4I_I2S_CLK_DIV_REG 0x24
74#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
75#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
76#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
77#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
78#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
79
80#define SUN4I_I2S_TX_CNT_REG 0x28
81#define SUN4I_I2S_RX_CNT_REG 0x2c
82
83#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
84#define SUN4I_I2S_CHAN_SEL_MASK GENMASK(2, 0)
85#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
86
87#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
88#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
89
90#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
91#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
92
93/* Defines required for sun8i-h3 support */
94#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
95#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
96
97#define SUN8I_I2S_CTRL_MODE_MASK GENMASK(5, 4)
98#define SUN8I_I2S_CTRL_MODE_RIGHT (2 << 4)
99#define SUN8I_I2S_CTRL_MODE_LEFT (1 << 4)
100#define SUN8I_I2S_CTRL_MODE_PCM (0 << 4)
101
102#define SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(19)
103#define SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 19)
104#define SUN8I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 19)
105#define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
106#define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
107#define SUN8I_I2S_FMT0_BCLK_POLARITY_MASK BIT(7)
108#define SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 7)
109#define SUN8I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 7)
110
111#define SUN8I_I2S_FMT1_REG_SEXT_MASK GENMASK(5, 4)
112#define SUN8I_I2S_FMT1_REG_SEXT(sext) ((sext) << 4)
113
114#define SUN8I_I2S_INT_STA_REG 0x0c
115#define SUN8I_I2S_FIFO_TX_REG 0x20
116
117#define SUN8I_I2S_CHAN_CFG_REG 0x30
118#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(7, 4)
119#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) ((chan - 1) << 4)
120#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(3, 0)
121#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
122
123#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
124#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
125#define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 12)
126#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
127#define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
128#define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
129
130#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
131#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
132
133/* Defines required for sun50i-h6 support */
134#define SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET_MASK GENMASK(21, 20)
135#define SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET(offset) ((offset) << 20)
136#define SUN50I_H6_I2S_TX_CHAN_SEL_MASK GENMASK(19, 16)
137#define SUN50I_H6_I2S_TX_CHAN_SEL(chan) ((chan - 1) << 16)
138#define SUN50I_H6_I2S_TX_CHAN_EN_MASK GENMASK(15, 0)
139#define SUN50I_H6_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1))
140
141#define SUN50I_H6_I2S_TX_CHAN_SEL_REG(pin) (0x34 + 4 * (pin))
142#define SUN50I_H6_I2S_TX_CHAN_MAP0_REG(pin) (0x44 + 8 * (pin))
143#define SUN50I_H6_I2S_TX_CHAN_MAP1_REG(pin) (0x48 + 8 * (pin))
144
145#define SUN50I_H6_I2S_RX_CHAN_SEL_REG 0x64
146#define SUN50I_H6_I2S_RX_CHAN_MAP0_REG 0x68
147#define SUN50I_H6_I2S_RX_CHAN_MAP1_REG 0x6C
148
149#define SUN50I_R329_I2S_RX_CHAN_MAP0_REG 0x68
150#define SUN50I_R329_I2S_RX_CHAN_MAP1_REG 0x6c
151#define SUN50I_R329_I2S_RX_CHAN_MAP2_REG 0x70
152#define SUN50I_R329_I2S_RX_CHAN_MAP3_REG 0x74
153
154struct sun4i_i2s;
155
156/**
157 * struct sun4i_i2s_quirks - Differences between SoC variants.
158 * @has_reset: SoC needs reset deasserted.
159 * @reg_offset_txdata: offset of the tx fifo.
160 * @sun4i_i2s_regmap: regmap config to use.
161 * @field_clkdiv_mclk_en: regmap field to enable mclk output.
162 * @field_fmt_wss: regmap field to set word select size.
163 * @field_fmt_sr: regmap field to set sample resolution.
164 * @num_din_pins: input pins
165 * @num_dout_pins: output pins (currently set but unused)
166 * @bclk_dividers: bit clock dividers array
167 * @num_bclk_dividers: number of bit clock dividers
168 * @mclk_dividers: mclk dividers array
169 * @num_mclk_dividers: number of mclk dividers
170 * @get_bclk_parent_rate: callback to get bclk parent rate
171 * @get_sr: callback to get sample resolution
172 * @get_wss: callback to get word select size
173 * @set_chan_cfg: callback to set channel configuration
174 * @set_fmt: callback to set format
175 */
176struct sun4i_i2s_quirks {
177 bool has_reset;
178 unsigned int reg_offset_txdata; /* TX FIFO */
179 const struct regmap_config *sun4i_i2s_regmap;
180
181 /* Register fields for i2s */
182 struct reg_field field_clkdiv_mclk_en;
183 struct reg_field field_fmt_wss;
184 struct reg_field field_fmt_sr;
185
186 unsigned int num_din_pins;
187 unsigned int num_dout_pins;
188
189 const struct sun4i_i2s_clk_div *bclk_dividers;
190 unsigned int num_bclk_dividers;
191 const struct sun4i_i2s_clk_div *mclk_dividers;
192 unsigned int num_mclk_dividers;
193
194 unsigned long (*get_bclk_parent_rate)(const struct sun4i_i2s *i2s);
195 int (*get_sr)(unsigned int width);
196 int (*get_wss)(unsigned int width);
197
198 /*
199 * In the set_chan_cfg() function pointer:
200 * @slots: channels per frame + padding slots, regardless of format
201 * @slot_width: bits per sample + padding bits, regardless of format
202 */
203 int (*set_chan_cfg)(const struct sun4i_i2s *i2s,
204 unsigned int channels, unsigned int slots,
205 unsigned int slot_width);
206 int (*set_fmt)(const struct sun4i_i2s *i2s, unsigned int fmt);
207};
208
209struct sun4i_i2s {
210 struct clk *bus_clk;
211 struct clk *mod_clk;
212 struct regmap *regmap;
213 struct reset_control *rst;
214
215 unsigned int format;
216 unsigned int mclk_freq;
217 unsigned int slots;
218 unsigned int slot_width;
219
220 struct snd_dmaengine_dai_dma_data capture_dma_data;
221 struct snd_dmaengine_dai_dma_data playback_dma_data;
222
223 /* Register fields for i2s */
224 struct regmap_field *field_clkdiv_mclk_en;
225 struct regmap_field *field_fmt_wss;
226 struct regmap_field *field_fmt_sr;
227
228 const struct sun4i_i2s_quirks *variant;
229};
230
231struct sun4i_i2s_clk_div {
232 u8 div;
233 u8 val;
234};
235
236static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
237 { .div = 2, .val = 0 },
238 { .div = 4, .val = 1 },
239 { .div = 6, .val = 2 },
240 { .div = 8, .val = 3 },
241 { .div = 12, .val = 4 },
242 { .div = 16, .val = 5 },
243 /* TODO - extend divide ratio supported by newer SoCs */
244};
245
246static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
247 { .div = 1, .val = 0 },
248 { .div = 2, .val = 1 },
249 { .div = 4, .val = 2 },
250 { .div = 6, .val = 3 },
251 { .div = 8, .val = 4 },
252 { .div = 12, .val = 5 },
253 { .div = 16, .val = 6 },
254 { .div = 24, .val = 7 },
255 /* TODO - extend divide ratio supported by newer SoCs */
256};
257
258static const struct sun4i_i2s_clk_div sun8i_i2s_clk_div[] = {
259 { .div = 1, .val = 1 },
260 { .div = 2, .val = 2 },
261 { .div = 4, .val = 3 },
262 { .div = 6, .val = 4 },
263 { .div = 8, .val = 5 },
264 { .div = 12, .val = 6 },
265 { .div = 16, .val = 7 },
266 { .div = 24, .val = 8 },
267 { .div = 32, .val = 9 },
268 { .div = 48, .val = 10 },
269 { .div = 64, .val = 11 },
270 { .div = 96, .val = 12 },
271 { .div = 128, .val = 13 },
272 { .div = 176, .val = 14 },
273 { .div = 192, .val = 15 },
274};
275
276static unsigned long sun4i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
277{
278 return i2s->mclk_freq;
279}
280
281static unsigned long sun8i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
282{
283 return clk_get_rate(i2s->mod_clk);
284}
285
286static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
287 unsigned long parent_rate,
288 unsigned int sampling_rate,
289 unsigned int channels,
290 unsigned int word_size)
291{
292 const struct sun4i_i2s_clk_div *dividers = i2s->variant->bclk_dividers;
293 int div = parent_rate / sampling_rate / word_size / channels;
294 int i;
295
296 for (i = 0; i < i2s->variant->num_bclk_dividers; i++) {
297 const struct sun4i_i2s_clk_div *bdiv = ÷rs[i];
298
299 if (bdiv->div == div)
300 return bdiv->val;
301 }
302
303 return -EINVAL;
304}
305
306static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
307 unsigned long parent_rate,
308 unsigned long mclk_rate)
309{
310 const struct sun4i_i2s_clk_div *dividers = i2s->variant->mclk_dividers;
311 int div = parent_rate / mclk_rate;
312 int i;
313
314 for (i = 0; i < i2s->variant->num_mclk_dividers; i++) {
315 const struct sun4i_i2s_clk_div *mdiv = ÷rs[i];
316
317 if (mdiv->div == div)
318 return mdiv->val;
319 }
320
321 return -EINVAL;
322}
323
324static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
325static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
326{
327 int i;
328
329 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
330 if (sun4i_i2s_oversample_rates[i] == oversample)
331 return true;
332
333 return false;
334}
335
336static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
337 unsigned int rate,
338 unsigned int slots,
339 unsigned int slot_width)
340{
341 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
342 unsigned int oversample_rate, clk_rate, bclk_parent_rate;
343 int bclk_div, mclk_div;
344 int ret;
345
346 switch (rate) {
347 case 176400:
348 case 88200:
349 case 44100:
350 case 22050:
351 case 11025:
352 clk_rate = 22579200;
353 break;
354
355 case 192000:
356 case 128000:
357 case 96000:
358 case 64000:
359 case 48000:
360 case 32000:
361 case 24000:
362 case 16000:
363 case 12000:
364 case 8000:
365 clk_rate = 24576000;
366 break;
367
368 default:
369 dev_err(dai->dev, "Unsupported sample rate: %u\n", rate);
370 return -EINVAL;
371 }
372
373 ret = clk_set_rate(i2s->mod_clk, clk_rate);
374 if (ret)
375 return ret;
376
377 oversample_rate = i2s->mclk_freq / rate;
378 if (!sun4i_i2s_oversample_is_valid(oversample_rate)) {
379 dev_err(dai->dev, "Unsupported oversample rate: %d\n",
380 oversample_rate);
381 return -EINVAL;
382 }
383
384 bclk_parent_rate = i2s->variant->get_bclk_parent_rate(i2s);
385 bclk_div = sun4i_i2s_get_bclk_div(i2s, bclk_parent_rate,
386 rate, slots, slot_width);
387 if (bclk_div < 0) {
388 dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div);
389 return -EINVAL;
390 }
391
392 mclk_div = sun4i_i2s_get_mclk_div(i2s, clk_rate, i2s->mclk_freq);
393 if (mclk_div < 0) {
394 dev_err(dai->dev, "Unsupported MCLK divider: %d\n", mclk_div);
395 return -EINVAL;
396 }
397
398 regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
399 SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
400 SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
401
402 regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
403
404 return 0;
405}
406
407static int sun4i_i2s_get_sr(unsigned int width)
408{
409 switch (width) {
410 case 16:
411 return 0;
412 case 20:
413 return 1;
414 case 24:
415 return 2;
416 }
417
418 return -EINVAL;
419}
420
421static int sun4i_i2s_get_wss(unsigned int width)
422{
423 switch (width) {
424 case 16:
425 return 0;
426 case 20:
427 return 1;
428 case 24:
429 return 2;
430 case 32:
431 return 3;
432 }
433
434 return -EINVAL;
435}
436
437static int sun8i_i2s_get_sr_wss(unsigned int width)
438{
439 switch (width) {
440 case 8:
441 return 1;
442 case 12:
443 return 2;
444 case 16:
445 return 3;
446 case 20:
447 return 4;
448 case 24:
449 return 5;
450 case 28:
451 return 6;
452 case 32:
453 return 7;
454 }
455
456 return -EINVAL;
457}
458
459static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
460 unsigned int channels, unsigned int slots,
461 unsigned int slot_width)
462{
463 /* Map the channels for playback and capture */
464 regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210);
465 regmap_write(i2s->regmap, SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210);
466
467 /* Configure the channels */
468 regmap_update_bits(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
469 SUN4I_I2S_CHAN_SEL_MASK,
470 SUN4I_I2S_CHAN_SEL(channels));
471 regmap_update_bits(i2s->regmap, SUN4I_I2S_RX_CHAN_SEL_REG,
472 SUN4I_I2S_CHAN_SEL_MASK,
473 SUN4I_I2S_CHAN_SEL(channels));
474
475 return 0;
476}
477
478static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
479 unsigned int channels, unsigned int slots,
480 unsigned int slot_width)
481{
482 unsigned int lrck_period;
483
484 /* Map the channels for playback and capture */
485 regmap_write(i2s->regmap, SUN8I_I2S_TX_CHAN_MAP_REG, 0x76543210);
486 regmap_write(i2s->regmap, SUN8I_I2S_RX_CHAN_MAP_REG, 0x76543210);
487
488 /* Configure the channels */
489 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
490 SUN4I_I2S_CHAN_SEL_MASK,
491 SUN4I_I2S_CHAN_SEL(channels));
492 regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
493 SUN4I_I2S_CHAN_SEL_MASK,
494 SUN4I_I2S_CHAN_SEL(channels));
495
496 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
497 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
498 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
499 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
500 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
501 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
502
503 switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) {
504 case SND_SOC_DAIFMT_DSP_A:
505 case SND_SOC_DAIFMT_DSP_B:
506 lrck_period = slot_width * slots;
507 break;
508
509 case SND_SOC_DAIFMT_LEFT_J:
510 case SND_SOC_DAIFMT_RIGHT_J:
511 case SND_SOC_DAIFMT_I2S:
512 lrck_period = slot_width;
513 break;
514
515 default:
516 return -EINVAL;
517 }
518
519 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
520 SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
521 SUN8I_I2S_FMT0_LRCK_PERIOD(lrck_period));
522
523 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
524 SUN8I_I2S_TX_CHAN_EN_MASK,
525 SUN8I_I2S_TX_CHAN_EN(channels));
526
527 return 0;
528}
529
530static int sun50i_h6_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
531 unsigned int channels, unsigned int slots,
532 unsigned int slot_width)
533{
534 unsigned int lrck_period;
535
536 /* Map the channels for playback and capture */
537 regmap_write(i2s->regmap, SUN50I_H6_I2S_TX_CHAN_MAP0_REG(0), 0xFEDCBA98);
538 regmap_write(i2s->regmap, SUN50I_H6_I2S_TX_CHAN_MAP1_REG(0), 0x76543210);
539 if (i2s->variant->num_din_pins > 1) {
540 regmap_write(i2s->regmap, SUN50I_R329_I2S_RX_CHAN_MAP0_REG, 0x0F0E0D0C);
541 regmap_write(i2s->regmap, SUN50I_R329_I2S_RX_CHAN_MAP1_REG, 0x0B0A0908);
542 regmap_write(i2s->regmap, SUN50I_R329_I2S_RX_CHAN_MAP2_REG, 0x07060504);
543 regmap_write(i2s->regmap, SUN50I_R329_I2S_RX_CHAN_MAP3_REG, 0x03020100);
544 } else {
545 regmap_write(i2s->regmap, SUN50I_H6_I2S_RX_CHAN_MAP0_REG, 0xFEDCBA98);
546 regmap_write(i2s->regmap, SUN50I_H6_I2S_RX_CHAN_MAP1_REG, 0x76543210);
547 }
548
549 /* Configure the channels */
550 regmap_update_bits(i2s->regmap, SUN50I_H6_I2S_TX_CHAN_SEL_REG(0),
551 SUN50I_H6_I2S_TX_CHAN_SEL_MASK,
552 SUN50I_H6_I2S_TX_CHAN_SEL(channels));
553 regmap_update_bits(i2s->regmap, SUN50I_H6_I2S_RX_CHAN_SEL_REG,
554 SUN50I_H6_I2S_TX_CHAN_SEL_MASK,
555 SUN50I_H6_I2S_TX_CHAN_SEL(channels));
556
557 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
558 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
559 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
560 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
561 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
562 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
563
564 switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) {
565 case SND_SOC_DAIFMT_DSP_A:
566 case SND_SOC_DAIFMT_DSP_B:
567 lrck_period = slot_width * slots;
568 break;
569
570 case SND_SOC_DAIFMT_LEFT_J:
571 case SND_SOC_DAIFMT_RIGHT_J:
572 case SND_SOC_DAIFMT_I2S:
573 lrck_period = slot_width;
574 break;
575
576 default:
577 return -EINVAL;
578 }
579
580 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
581 SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
582 SUN8I_I2S_FMT0_LRCK_PERIOD(lrck_period));
583
584 regmap_update_bits(i2s->regmap, SUN50I_H6_I2S_TX_CHAN_SEL_REG(0),
585 SUN50I_H6_I2S_TX_CHAN_EN_MASK,
586 SUN50I_H6_I2S_TX_CHAN_EN(channels));
587
588 return 0;
589}
590
591static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
592 struct snd_pcm_hw_params *params,
593 struct snd_soc_dai *dai)
594{
595 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
596 unsigned int word_size = params_width(params);
597 unsigned int slot_width = params_physical_width(params);
598 unsigned int channels = params_channels(params);
599
600 unsigned int slots = channels;
601
602 int ret, sr, wss;
603 u32 width;
604
605 if (i2s->slots)
606 slots = i2s->slots;
607
608 if (i2s->slot_width)
609 slot_width = i2s->slot_width;
610
611 ret = i2s->variant->set_chan_cfg(i2s, channels, slots, slot_width);
612 if (ret < 0) {
613 dev_err(dai->dev, "Invalid channel configuration\n");
614 return ret;
615 }
616
617 /* Set significant bits in our FIFOs */
618 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
619 SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
620 SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
621 SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
622 SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
623
624 switch (params_physical_width(params)) {
625 case 16:
626 width = DMA_SLAVE_BUSWIDTH_2_BYTES;
627 break;
628 case 32:
629 width = DMA_SLAVE_BUSWIDTH_4_BYTES;
630 break;
631 default:
632 dev_err(dai->dev, "Unsupported physical sample width: %d\n",
633 params_physical_width(params));
634 return -EINVAL;
635 }
636 i2s->playback_dma_data.addr_width = width;
637
638 sr = i2s->variant->get_sr(word_size);
639 if (sr < 0)
640 return -EINVAL;
641
642 wss = i2s->variant->get_wss(slot_width);
643 if (wss < 0)
644 return -EINVAL;
645
646 regmap_field_write(i2s->field_fmt_wss, wss);
647 regmap_field_write(i2s->field_fmt_sr, sr);
648
649 return sun4i_i2s_set_clk_rate(dai, params_rate(params),
650 slots, slot_width);
651}
652
653static int sun4i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
654 unsigned int fmt)
655{
656 u32 val;
657
658 /* DAI clock polarity */
659 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
660 case SND_SOC_DAIFMT_IB_IF:
661 /* Invert both clocks */
662 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
663 SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
664 break;
665 case SND_SOC_DAIFMT_IB_NF:
666 /* Invert bit clock */
667 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED;
668 break;
669 case SND_SOC_DAIFMT_NB_IF:
670 /* Invert frame clock */
671 val = SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
672 break;
673 case SND_SOC_DAIFMT_NB_NF:
674 val = 0;
675 break;
676 default:
677 return -EINVAL;
678 }
679
680 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
681 SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK |
682 SUN4I_I2S_FMT0_BCLK_POLARITY_MASK,
683 val);
684
685 /* DAI Mode */
686 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
687 case SND_SOC_DAIFMT_I2S:
688 val = SUN4I_I2S_FMT0_FMT_I2S;
689 break;
690
691 case SND_SOC_DAIFMT_LEFT_J:
692 val = SUN4I_I2S_FMT0_FMT_LEFT_J;
693 break;
694
695 case SND_SOC_DAIFMT_RIGHT_J:
696 val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
697 break;
698
699 default:
700 return -EINVAL;
701 }
702
703 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
704 SUN4I_I2S_FMT0_FMT_MASK, val);
705
706 /* DAI clock master masks */
707 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
708 case SND_SOC_DAIFMT_BP_FP:
709 /* BCLK and LRCLK master */
710 val = SUN4I_I2S_CTRL_MODE_MASTER;
711 break;
712
713 case SND_SOC_DAIFMT_BC_FC:
714 /* BCLK and LRCLK slave */
715 val = SUN4I_I2S_CTRL_MODE_SLAVE;
716 break;
717
718 default:
719 return -EINVAL;
720 }
721 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
722 SUN4I_I2S_CTRL_MODE_MASK, val);
723
724 return 0;
725}
726
727static int sun8i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
728 unsigned int fmt)
729{
730 u32 mode, val;
731 u8 offset;
732
733 /*
734 * DAI clock polarity
735 *
736 * The setup for LRCK contradicts the datasheet, but under a
737 * scope it's clear that the LRCK polarity is reversed
738 * compared to the expected polarity on the bus.
739 */
740 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
741 case SND_SOC_DAIFMT_IB_IF:
742 /* Invert both clocks */
743 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED;
744 break;
745 case SND_SOC_DAIFMT_IB_NF:
746 /* Invert bit clock */
747 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED |
748 SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
749 break;
750 case SND_SOC_DAIFMT_NB_IF:
751 /* Invert frame clock */
752 val = 0;
753 break;
754 case SND_SOC_DAIFMT_NB_NF:
755 val = SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
756 break;
757 default:
758 return -EINVAL;
759 }
760
761 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
762 SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK |
763 SUN8I_I2S_FMT0_BCLK_POLARITY_MASK,
764 val);
765
766 /* DAI Mode */
767 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
768 case SND_SOC_DAIFMT_DSP_A:
769 mode = SUN8I_I2S_CTRL_MODE_PCM;
770 offset = 1;
771 break;
772
773 case SND_SOC_DAIFMT_DSP_B:
774 mode = SUN8I_I2S_CTRL_MODE_PCM;
775 offset = 0;
776 break;
777
778 case SND_SOC_DAIFMT_I2S:
779 mode = SUN8I_I2S_CTRL_MODE_LEFT;
780 offset = 1;
781 break;
782
783 case SND_SOC_DAIFMT_LEFT_J:
784 mode = SUN8I_I2S_CTRL_MODE_LEFT;
785 offset = 0;
786 break;
787
788 case SND_SOC_DAIFMT_RIGHT_J:
789 mode = SUN8I_I2S_CTRL_MODE_RIGHT;
790 offset = 0;
791 break;
792
793 default:
794 return -EINVAL;
795 }
796
797 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
798 SUN8I_I2S_CTRL_MODE_MASK, mode);
799 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
800 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
801 SUN8I_I2S_TX_CHAN_OFFSET(offset));
802 regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
803 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
804 SUN8I_I2S_TX_CHAN_OFFSET(offset));
805
806 /* DAI clock master masks */
807 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
808 case SND_SOC_DAIFMT_BP_FP:
809 /* BCLK and LRCLK master */
810 val = SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT;
811 break;
812
813 case SND_SOC_DAIFMT_BC_FC:
814 /* BCLK and LRCLK slave */
815 val = 0;
816 break;
817
818 default:
819 return -EINVAL;
820 }
821
822 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
823 SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT,
824 val);
825
826 /* Set sign extension to pad out LSB with 0 */
827 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT1_REG,
828 SUN8I_I2S_FMT1_REG_SEXT_MASK,
829 SUN8I_I2S_FMT1_REG_SEXT(0));
830
831 return 0;
832}
833
834static int sun50i_h6_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
835 unsigned int fmt)
836{
837 u32 mode, val;
838 u8 offset;
839
840 /*
841 * DAI clock polarity
842 *
843 * The setup for LRCK contradicts the datasheet, but under a
844 * scope it's clear that the LRCK polarity is reversed
845 * compared to the expected polarity on the bus.
846 */
847 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
848 case SND_SOC_DAIFMT_IB_IF:
849 /* Invert both clocks */
850 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED;
851 break;
852 case SND_SOC_DAIFMT_IB_NF:
853 /* Invert bit clock */
854 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED |
855 SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
856 break;
857 case SND_SOC_DAIFMT_NB_IF:
858 /* Invert frame clock */
859 val = 0;
860 break;
861 case SND_SOC_DAIFMT_NB_NF:
862 val = SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
863 break;
864 default:
865 return -EINVAL;
866 }
867
868 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
869 SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK |
870 SUN8I_I2S_FMT0_BCLK_POLARITY_MASK,
871 val);
872
873 /* DAI Mode */
874 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
875 case SND_SOC_DAIFMT_DSP_A:
876 mode = SUN8I_I2S_CTRL_MODE_PCM;
877 offset = 1;
878 break;
879
880 case SND_SOC_DAIFMT_DSP_B:
881 mode = SUN8I_I2S_CTRL_MODE_PCM;
882 offset = 0;
883 break;
884
885 case SND_SOC_DAIFMT_I2S:
886 mode = SUN8I_I2S_CTRL_MODE_LEFT;
887 offset = 1;
888 break;
889
890 case SND_SOC_DAIFMT_LEFT_J:
891 mode = SUN8I_I2S_CTRL_MODE_LEFT;
892 offset = 0;
893 break;
894
895 case SND_SOC_DAIFMT_RIGHT_J:
896 mode = SUN8I_I2S_CTRL_MODE_RIGHT;
897 offset = 0;
898 break;
899
900 default:
901 return -EINVAL;
902 }
903
904 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
905 SUN8I_I2S_CTRL_MODE_MASK, mode);
906 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
907 SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET_MASK,
908 SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET(offset));
909 regmap_update_bits(i2s->regmap, SUN50I_H6_I2S_RX_CHAN_SEL_REG,
910 SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET_MASK,
911 SUN50I_H6_I2S_TX_CHAN_SEL_OFFSET(offset));
912
913 /* DAI clock master masks */
914 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
915 case SND_SOC_DAIFMT_BP_FP:
916 /* BCLK and LRCLK master */
917 val = SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT;
918 break;
919
920 case SND_SOC_DAIFMT_BC_FC:
921 /* BCLK and LRCLK slave */
922 val = 0;
923 break;
924
925 default:
926 return -EINVAL;
927 }
928
929 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
930 SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT,
931 val);
932
933 /* Set sign extension to pad out LSB with 0 */
934 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT1_REG,
935 SUN8I_I2S_FMT1_REG_SEXT_MASK,
936 SUN8I_I2S_FMT1_REG_SEXT(0));
937
938 return 0;
939}
940
941static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
942{
943 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
944 int ret;
945
946 ret = i2s->variant->set_fmt(i2s, fmt);
947 if (ret) {
948 dev_err(dai->dev, "Unsupported format configuration\n");
949 return ret;
950 }
951
952 i2s->format = fmt;
953
954 return 0;
955}
956
957static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
958{
959 /* Flush RX FIFO */
960 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
961 SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
962 SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
963
964 /* Clear RX counter */
965 regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
966
967 /* Enable RX Block */
968 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
969 SUN4I_I2S_CTRL_RX_EN,
970 SUN4I_I2S_CTRL_RX_EN);
971
972 /* Enable RX DRQ */
973 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
974 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
975 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
976}
977
978static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
979{
980 /* Flush TX FIFO */
981 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
982 SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
983 SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
984
985 /* Clear TX counter */
986 regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
987
988 /* Enable TX Block */
989 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
990 SUN4I_I2S_CTRL_TX_EN,
991 SUN4I_I2S_CTRL_TX_EN);
992
993 /* Enable TX DRQ */
994 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
995 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
996 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
997}
998
999static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
1000{
1001 /* Disable RX Block */
1002 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1003 SUN4I_I2S_CTRL_RX_EN,
1004 0);
1005
1006 /* Disable RX DRQ */
1007 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
1008 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
1009 0);
1010}
1011
1012static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
1013{
1014 /* Disable TX Block */
1015 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1016 SUN4I_I2S_CTRL_TX_EN,
1017 0);
1018
1019 /* Disable TX DRQ */
1020 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
1021 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
1022 0);
1023}
1024
1025static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
1026 struct snd_soc_dai *dai)
1027{
1028 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
1029
1030 switch (cmd) {
1031 case SNDRV_PCM_TRIGGER_START:
1032 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1033 case SNDRV_PCM_TRIGGER_RESUME:
1034 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1035 sun4i_i2s_start_playback(i2s);
1036 else
1037 sun4i_i2s_start_capture(i2s);
1038 break;
1039
1040 case SNDRV_PCM_TRIGGER_STOP:
1041 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1042 case SNDRV_PCM_TRIGGER_SUSPEND:
1043 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1044 sun4i_i2s_stop_playback(i2s);
1045 else
1046 sun4i_i2s_stop_capture(i2s);
1047 break;
1048
1049 default:
1050 return -EINVAL;
1051 }
1052
1053 return 0;
1054}
1055
1056static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
1057 unsigned int freq, int dir)
1058{
1059 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
1060
1061 if (clk_id != 0)
1062 return -EINVAL;
1063
1064 i2s->mclk_freq = freq;
1065
1066 return 0;
1067}
1068
1069static int sun4i_i2s_set_tdm_slot(struct snd_soc_dai *dai,
1070 unsigned int tx_mask, unsigned int rx_mask,
1071 int slots, int slot_width)
1072{
1073 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
1074
1075 if (slots > 8)
1076 return -EINVAL;
1077
1078 i2s->slots = slots;
1079 i2s->slot_width = slot_width;
1080
1081 return 0;
1082}
1083
1084static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
1085 .hw_params = sun4i_i2s_hw_params,
1086 .set_fmt = sun4i_i2s_set_fmt,
1087 .set_sysclk = sun4i_i2s_set_sysclk,
1088 .set_tdm_slot = sun4i_i2s_set_tdm_slot,
1089 .trigger = sun4i_i2s_trigger,
1090};
1091
1092static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
1093{
1094 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
1095
1096 snd_soc_dai_init_dma_data(dai,
1097 &i2s->playback_dma_data,
1098 &i2s->capture_dma_data);
1099
1100 return 0;
1101}
1102
1103#define SUN4I_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
1104 SNDRV_PCM_FMTBIT_S20_LE | \
1105 SNDRV_PCM_FMTBIT_S24_LE)
1106
1107static struct snd_soc_dai_driver sun4i_i2s_dai = {
1108 .probe = sun4i_i2s_dai_probe,
1109 .capture = {
1110 .stream_name = "Capture",
1111 .channels_min = 1,
1112 .channels_max = 8,
1113 .rates = SNDRV_PCM_RATE_8000_192000,
1114 .formats = SUN4I_FORMATS,
1115 },
1116 .playback = {
1117 .stream_name = "Playback",
1118 .channels_min = 1,
1119 .channels_max = 8,
1120 .rates = SNDRV_PCM_RATE_8000_192000,
1121 .formats = SUN4I_FORMATS,
1122 },
1123 .ops = &sun4i_i2s_dai_ops,
1124 .symmetric_rate = 1,
1125};
1126
1127static const struct snd_soc_component_driver sun4i_i2s_component = {
1128 .name = "sun4i-dai",
1129 .legacy_dai_naming = 1,
1130};
1131
1132static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
1133{
1134 switch (reg) {
1135 case SUN4I_I2S_FIFO_TX_REG:
1136 return false;
1137
1138 default:
1139 return true;
1140 }
1141}
1142
1143static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
1144{
1145 switch (reg) {
1146 case SUN4I_I2S_FIFO_RX_REG:
1147 case SUN4I_I2S_FIFO_STA_REG:
1148 return false;
1149
1150 default:
1151 return true;
1152 }
1153}
1154
1155static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
1156{
1157 switch (reg) {
1158 case SUN4I_I2S_FIFO_RX_REG:
1159 case SUN4I_I2S_INT_STA_REG:
1160 case SUN4I_I2S_RX_CNT_REG:
1161 case SUN4I_I2S_TX_CNT_REG:
1162 return true;
1163
1164 default:
1165 return false;
1166 }
1167}
1168
1169static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
1170{
1171 switch (reg) {
1172 case SUN8I_I2S_FIFO_TX_REG:
1173 return false;
1174
1175 default:
1176 return true;
1177 }
1178}
1179
1180static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
1181{
1182 switch (reg) {
1183 case SUN4I_I2S_FIFO_CTRL_REG:
1184 case SUN4I_I2S_FIFO_RX_REG:
1185 case SUN4I_I2S_FIFO_STA_REG:
1186 case SUN4I_I2S_RX_CNT_REG:
1187 case SUN4I_I2S_TX_CNT_REG:
1188 case SUN8I_I2S_FIFO_TX_REG:
1189 case SUN8I_I2S_INT_STA_REG:
1190 return true;
1191
1192 default:
1193 return false;
1194 }
1195}
1196
1197static const struct reg_default sun4i_i2s_reg_defaults[] = {
1198 { SUN4I_I2S_CTRL_REG, 0x00000000 },
1199 { SUN4I_I2S_FMT0_REG, 0x0000000c },
1200 { SUN4I_I2S_FMT1_REG, 0x00004020 },
1201 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
1202 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
1203 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
1204 { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
1205 { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
1206 { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
1207 { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
1208};
1209
1210static const struct reg_default sun8i_i2s_reg_defaults[] = {
1211 { SUN4I_I2S_CTRL_REG, 0x00060000 },
1212 { SUN4I_I2S_FMT0_REG, 0x00000033 },
1213 { SUN4I_I2S_FMT1_REG, 0x00000030 },
1214 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
1215 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
1216 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
1217 { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
1218 { SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
1219 { SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
1220 { SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
1221 { SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
1222};
1223
1224static const struct reg_default sun50i_h6_i2s_reg_defaults[] = {
1225 { SUN4I_I2S_CTRL_REG, 0x00060000 },
1226 { SUN4I_I2S_FMT0_REG, 0x00000033 },
1227 { SUN4I_I2S_FMT1_REG, 0x00000030 },
1228 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
1229 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
1230 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
1231 { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
1232 { SUN50I_H6_I2S_TX_CHAN_SEL_REG(0), 0x00000000 },
1233 { SUN50I_H6_I2S_TX_CHAN_MAP0_REG(0), 0x00000000 },
1234 { SUN50I_H6_I2S_TX_CHAN_MAP1_REG(0), 0x00000000 },
1235 { SUN50I_H6_I2S_RX_CHAN_SEL_REG, 0x00000000 },
1236 { SUN50I_H6_I2S_RX_CHAN_MAP0_REG, 0x00000000 },
1237 { SUN50I_H6_I2S_RX_CHAN_MAP1_REG, 0x00000000 },
1238};
1239
1240static const struct regmap_config sun4i_i2s_regmap_config = {
1241 .reg_bits = 32,
1242 .reg_stride = 4,
1243 .val_bits = 32,
1244 .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
1245
1246 .cache_type = REGCACHE_FLAT,
1247 .reg_defaults = sun4i_i2s_reg_defaults,
1248 .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
1249 .writeable_reg = sun4i_i2s_wr_reg,
1250 .readable_reg = sun4i_i2s_rd_reg,
1251 .volatile_reg = sun4i_i2s_volatile_reg,
1252};
1253
1254static const struct regmap_config sun8i_i2s_regmap_config = {
1255 .reg_bits = 32,
1256 .reg_stride = 4,
1257 .val_bits = 32,
1258 .max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
1259 .cache_type = REGCACHE_FLAT,
1260 .reg_defaults = sun8i_i2s_reg_defaults,
1261 .num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
1262 .writeable_reg = sun4i_i2s_wr_reg,
1263 .readable_reg = sun8i_i2s_rd_reg,
1264 .volatile_reg = sun8i_i2s_volatile_reg,
1265};
1266
1267static const struct regmap_config sun50i_h6_i2s_regmap_config = {
1268 .reg_bits = 32,
1269 .reg_stride = 4,
1270 .val_bits = 32,
1271 .max_register = SUN50I_R329_I2S_RX_CHAN_MAP3_REG,
1272 .cache_type = REGCACHE_FLAT,
1273 .reg_defaults = sun50i_h6_i2s_reg_defaults,
1274 .num_reg_defaults = ARRAY_SIZE(sun50i_h6_i2s_reg_defaults),
1275 .writeable_reg = sun4i_i2s_wr_reg,
1276 .readable_reg = sun8i_i2s_rd_reg,
1277 .volatile_reg = sun8i_i2s_volatile_reg,
1278};
1279
1280static int sun4i_i2s_runtime_resume(struct device *dev)
1281{
1282 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
1283 int ret;
1284
1285 ret = clk_prepare_enable(i2s->bus_clk);
1286 if (ret) {
1287 dev_err(dev, "Failed to enable bus clock\n");
1288 return ret;
1289 }
1290
1291 regcache_cache_only(i2s->regmap, false);
1292 regcache_mark_dirty(i2s->regmap);
1293
1294 ret = regcache_sync(i2s->regmap);
1295 if (ret) {
1296 dev_err(dev, "Failed to sync regmap cache\n");
1297 goto err_disable_clk;
1298 }
1299
1300 /* Enable the whole hardware block */
1301 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1302 SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
1303
1304 /* Enable the first output line */
1305 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1306 SUN4I_I2S_CTRL_SDO_EN_MASK,
1307 SUN4I_I2S_CTRL_SDO_EN(0));
1308
1309 ret = clk_prepare_enable(i2s->mod_clk);
1310 if (ret) {
1311 dev_err(dev, "Failed to enable module clock\n");
1312 goto err_disable_clk;
1313 }
1314
1315 return 0;
1316
1317err_disable_clk:
1318 clk_disable_unprepare(i2s->bus_clk);
1319 return ret;
1320}
1321
1322static int sun4i_i2s_runtime_suspend(struct device *dev)
1323{
1324 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
1325
1326 clk_disable_unprepare(i2s->mod_clk);
1327
1328 /* Disable our output lines */
1329 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1330 SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
1331
1332 /* Disable the whole hardware block */
1333 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1334 SUN4I_I2S_CTRL_GL_EN, 0);
1335
1336 regcache_cache_only(i2s->regmap, true);
1337
1338 clk_disable_unprepare(i2s->bus_clk);
1339
1340 return 0;
1341}
1342
1343static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
1344 .has_reset = false,
1345 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
1346 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1347 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1348 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1349 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1350 .bclk_dividers = sun4i_i2s_bclk_div,
1351 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1352 .mclk_dividers = sun4i_i2s_mclk_div,
1353 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1354 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1355 .get_sr = sun4i_i2s_get_sr,
1356 .get_wss = sun4i_i2s_get_wss,
1357 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1358 .set_fmt = sun4i_i2s_set_soc_fmt,
1359};
1360
1361static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
1362 .has_reset = true,
1363 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
1364 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1365 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1366 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1367 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1368 .bclk_dividers = sun4i_i2s_bclk_div,
1369 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1370 .mclk_dividers = sun4i_i2s_mclk_div,
1371 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1372 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1373 .get_sr = sun4i_i2s_get_sr,
1374 .get_wss = sun4i_i2s_get_wss,
1375 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1376 .set_fmt = sun4i_i2s_set_soc_fmt,
1377};
1378
1379/*
1380 * This doesn't describe the TDM controller documented in the A83t
1381 * datasheet, but the three undocumented I2S controller that use the
1382 * older design.
1383 */
1384static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
1385 .has_reset = true,
1386 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1387 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1388 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1389 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1390 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1391 .bclk_dividers = sun4i_i2s_bclk_div,
1392 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1393 .mclk_dividers = sun4i_i2s_mclk_div,
1394 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1395 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1396 .get_sr = sun4i_i2s_get_sr,
1397 .get_wss = sun4i_i2s_get_wss,
1398 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1399 .set_fmt = sun4i_i2s_set_soc_fmt,
1400};
1401
1402static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
1403 .has_reset = true,
1404 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1405 .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
1406 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
1407 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
1408 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
1409 .bclk_dividers = sun8i_i2s_clk_div,
1410 .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1411 .mclk_dividers = sun8i_i2s_clk_div,
1412 .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1413 .get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
1414 .get_sr = sun8i_i2s_get_sr_wss,
1415 .get_wss = sun8i_i2s_get_sr_wss,
1416 .set_chan_cfg = sun8i_i2s_set_chan_cfg,
1417 .set_fmt = sun8i_i2s_set_soc_fmt,
1418};
1419
1420static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
1421 .has_reset = true,
1422 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1423 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1424 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1425 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1426 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1427 .bclk_dividers = sun4i_i2s_bclk_div,
1428 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1429 .mclk_dividers = sun4i_i2s_mclk_div,
1430 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1431 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1432 .get_sr = sun4i_i2s_get_sr,
1433 .get_wss = sun4i_i2s_get_wss,
1434 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1435 .set_fmt = sun4i_i2s_set_soc_fmt,
1436};
1437
1438static const struct sun4i_i2s_quirks sun50i_h6_i2s_quirks = {
1439 .has_reset = true,
1440 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1441 .sun4i_i2s_regmap = &sun50i_h6_i2s_regmap_config,
1442 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
1443 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
1444 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
1445 .bclk_dividers = sun8i_i2s_clk_div,
1446 .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1447 .mclk_dividers = sun8i_i2s_clk_div,
1448 .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1449 .get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
1450 .get_sr = sun8i_i2s_get_sr_wss,
1451 .get_wss = sun8i_i2s_get_sr_wss,
1452 .set_chan_cfg = sun50i_h6_i2s_set_chan_cfg,
1453 .set_fmt = sun50i_h6_i2s_set_soc_fmt,
1454};
1455
1456static const struct sun4i_i2s_quirks sun50i_r329_i2s_quirks = {
1457 .has_reset = true,
1458 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1459 .sun4i_i2s_regmap = &sun50i_h6_i2s_regmap_config,
1460 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
1461 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
1462 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
1463 .num_din_pins = 4,
1464 .num_dout_pins = 4,
1465 .bclk_dividers = sun8i_i2s_clk_div,
1466 .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1467 .mclk_dividers = sun8i_i2s_clk_div,
1468 .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1469 .get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
1470 .get_sr = sun8i_i2s_get_sr_wss,
1471 .get_wss = sun8i_i2s_get_sr_wss,
1472 .set_chan_cfg = sun50i_h6_i2s_set_chan_cfg,
1473 .set_fmt = sun50i_h6_i2s_set_soc_fmt,
1474};
1475
1476static int sun4i_i2s_init_regmap_fields(struct device *dev,
1477 struct sun4i_i2s *i2s)
1478{
1479 i2s->field_clkdiv_mclk_en =
1480 devm_regmap_field_alloc(dev, i2s->regmap,
1481 i2s->variant->field_clkdiv_mclk_en);
1482 if (IS_ERR(i2s->field_clkdiv_mclk_en))
1483 return PTR_ERR(i2s->field_clkdiv_mclk_en);
1484
1485 i2s->field_fmt_wss =
1486 devm_regmap_field_alloc(dev, i2s->regmap,
1487 i2s->variant->field_fmt_wss);
1488 if (IS_ERR(i2s->field_fmt_wss))
1489 return PTR_ERR(i2s->field_fmt_wss);
1490
1491 i2s->field_fmt_sr =
1492 devm_regmap_field_alloc(dev, i2s->regmap,
1493 i2s->variant->field_fmt_sr);
1494 if (IS_ERR(i2s->field_fmt_sr))
1495 return PTR_ERR(i2s->field_fmt_sr);
1496
1497 return 0;
1498}
1499
1500static int sun4i_i2s_probe(struct platform_device *pdev)
1501{
1502 struct sun4i_i2s *i2s;
1503 struct resource *res;
1504 void __iomem *regs;
1505 int irq, ret;
1506
1507 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
1508 if (!i2s)
1509 return -ENOMEM;
1510 platform_set_drvdata(pdev, i2s);
1511
1512 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1513 if (IS_ERR(regs))
1514 return PTR_ERR(regs);
1515
1516 irq = platform_get_irq(pdev, 0);
1517 if (irq < 0)
1518 return irq;
1519
1520 i2s->variant = of_device_get_match_data(&pdev->dev);
1521 if (!i2s->variant) {
1522 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
1523 return -ENODEV;
1524 }
1525
1526 i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
1527 if (IS_ERR(i2s->bus_clk)) {
1528 dev_err(&pdev->dev, "Can't get our bus clock\n");
1529 return PTR_ERR(i2s->bus_clk);
1530 }
1531
1532 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
1533 i2s->variant->sun4i_i2s_regmap);
1534 if (IS_ERR(i2s->regmap)) {
1535 dev_err(&pdev->dev, "Regmap initialisation failed\n");
1536 return PTR_ERR(i2s->regmap);
1537 }
1538
1539 i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
1540 if (IS_ERR(i2s->mod_clk)) {
1541 dev_err(&pdev->dev, "Can't get our mod clock\n");
1542 return PTR_ERR(i2s->mod_clk);
1543 }
1544
1545 if (i2s->variant->has_reset) {
1546 i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
1547 if (IS_ERR(i2s->rst)) {
1548 dev_err(&pdev->dev, "Failed to get reset control\n");
1549 return PTR_ERR(i2s->rst);
1550 }
1551 }
1552
1553 if (!IS_ERR(i2s->rst)) {
1554 ret = reset_control_deassert(i2s->rst);
1555 if (ret) {
1556 dev_err(&pdev->dev,
1557 "Failed to deassert the reset control\n");
1558 return -EINVAL;
1559 }
1560 }
1561
1562 i2s->playback_dma_data.addr = res->start +
1563 i2s->variant->reg_offset_txdata;
1564 i2s->playback_dma_data.maxburst = 8;
1565
1566 i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
1567 i2s->capture_dma_data.maxburst = 8;
1568
1569 pm_runtime_enable(&pdev->dev);
1570 if (!pm_runtime_enabled(&pdev->dev)) {
1571 ret = sun4i_i2s_runtime_resume(&pdev->dev);
1572 if (ret)
1573 goto err_pm_disable;
1574 }
1575
1576 ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
1577 if (ret) {
1578 dev_err(&pdev->dev, "Could not initialise regmap fields\n");
1579 goto err_suspend;
1580 }
1581
1582 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1583 if (ret) {
1584 dev_err(&pdev->dev, "Could not register PCM\n");
1585 goto err_suspend;
1586 }
1587
1588 ret = devm_snd_soc_register_component(&pdev->dev,
1589 &sun4i_i2s_component,
1590 &sun4i_i2s_dai, 1);
1591 if (ret) {
1592 dev_err(&pdev->dev, "Could not register DAI\n");
1593 goto err_suspend;
1594 }
1595
1596 return 0;
1597
1598err_suspend:
1599 if (!pm_runtime_status_suspended(&pdev->dev))
1600 sun4i_i2s_runtime_suspend(&pdev->dev);
1601err_pm_disable:
1602 pm_runtime_disable(&pdev->dev);
1603 if (!IS_ERR(i2s->rst))
1604 reset_control_assert(i2s->rst);
1605
1606 return ret;
1607}
1608
1609static int sun4i_i2s_remove(struct platform_device *pdev)
1610{
1611 struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
1612
1613 pm_runtime_disable(&pdev->dev);
1614 if (!pm_runtime_status_suspended(&pdev->dev))
1615 sun4i_i2s_runtime_suspend(&pdev->dev);
1616
1617 if (!IS_ERR(i2s->rst))
1618 reset_control_assert(i2s->rst);
1619
1620 return 0;
1621}
1622
1623static const struct of_device_id sun4i_i2s_match[] = {
1624 {
1625 .compatible = "allwinner,sun4i-a10-i2s",
1626 .data = &sun4i_a10_i2s_quirks,
1627 },
1628 {
1629 .compatible = "allwinner,sun6i-a31-i2s",
1630 .data = &sun6i_a31_i2s_quirks,
1631 },
1632 {
1633 .compatible = "allwinner,sun8i-a83t-i2s",
1634 .data = &sun8i_a83t_i2s_quirks,
1635 },
1636 {
1637 .compatible = "allwinner,sun8i-h3-i2s",
1638 .data = &sun8i_h3_i2s_quirks,
1639 },
1640 {
1641 .compatible = "allwinner,sun50i-a64-codec-i2s",
1642 .data = &sun50i_a64_codec_i2s_quirks,
1643 },
1644 {
1645 .compatible = "allwinner,sun50i-h6-i2s",
1646 .data = &sun50i_h6_i2s_quirks,
1647 },
1648 {
1649 .compatible = "allwinner,sun50i-r329-i2s",
1650 .data = &sun50i_r329_i2s_quirks,
1651 },
1652 {}
1653};
1654MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
1655
1656static const struct dev_pm_ops sun4i_i2s_pm_ops = {
1657 .runtime_resume = sun4i_i2s_runtime_resume,
1658 .runtime_suspend = sun4i_i2s_runtime_suspend,
1659};
1660
1661static struct platform_driver sun4i_i2s_driver = {
1662 .probe = sun4i_i2s_probe,
1663 .remove = sun4i_i2s_remove,
1664 .driver = {
1665 .name = "sun4i-i2s",
1666 .of_match_table = sun4i_i2s_match,
1667 .pm = &sun4i_i2s_pm_ops,
1668 },
1669};
1670module_platform_driver(sun4i_i2s_driver);
1671
1672MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
1673MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
1674MODULE_DESCRIPTION("Allwinner A10 I2S driver");
1675MODULE_LICENSE("GPL");
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
54#define SUN4I_I2S_FMT1_REG 0x08
55#define SUN4I_I2S_FIFO_TX_REG 0x0c
56#define SUN4I_I2S_FIFO_RX_REG 0x10
57
58#define SUN4I_I2S_FIFO_CTRL_REG 0x14
59#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
60#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
61#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
62#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
63#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
64#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
65
66#define SUN4I_I2S_FIFO_STA_REG 0x18
67
68#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
69#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
70#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
71
72#define SUN4I_I2S_INT_STA_REG 0x20
73
74#define SUN4I_I2S_CLK_DIV_REG 0x24
75#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
76#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
77#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
78#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
79#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
80
81#define SUN4I_I2S_RX_CNT_REG 0x28
82#define SUN4I_I2S_TX_CNT_REG 0x2c
83
84#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
85#define SUN4I_I2S_TX_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
86
87#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
88#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
89
90#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
91#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
92
93struct sun4i_i2s {
94 struct clk *bus_clk;
95 struct clk *mod_clk;
96 struct regmap *regmap;
97 struct reset_control *rst;
98
99 unsigned int mclk_freq;
100
101 struct snd_dmaengine_dai_dma_data capture_dma_data;
102 struct snd_dmaengine_dai_dma_data playback_dma_data;
103};
104
105struct sun4i_i2s_clk_div {
106 u8 div;
107 u8 val;
108};
109
110static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
111 { .div = 2, .val = 0 },
112 { .div = 4, .val = 1 },
113 { .div = 6, .val = 2 },
114 { .div = 8, .val = 3 },
115 { .div = 12, .val = 4 },
116 { .div = 16, .val = 5 },
117};
118
119static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
120 { .div = 1, .val = 0 },
121 { .div = 2, .val = 1 },
122 { .div = 4, .val = 2 },
123 { .div = 6, .val = 3 },
124 { .div = 8, .val = 4 },
125 { .div = 12, .val = 5 },
126 { .div = 16, .val = 6 },
127 { .div = 24, .val = 7 },
128};
129
130static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
131 unsigned int oversample_rate,
132 unsigned int word_size)
133{
134 int div = oversample_rate / word_size / 2;
135 int i;
136
137 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) {
138 const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
139
140 if (bdiv->div == div)
141 return bdiv->val;
142 }
143
144 return -EINVAL;
145}
146
147static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
148 unsigned int oversample_rate,
149 unsigned int module_rate,
150 unsigned int sampling_rate)
151{
152 int div = module_rate / sampling_rate / oversample_rate;
153 int i;
154
155 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_mclk_div); i++) {
156 const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
157
158 if (mdiv->div == div)
159 return mdiv->val;
160 }
161
162 return -EINVAL;
163}
164
165static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
166static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
167{
168 int i;
169
170 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
171 if (sun4i_i2s_oversample_rates[i] == oversample)
172 return true;
173
174 return false;
175}
176
177static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
178 unsigned int rate,
179 unsigned int word_size)
180{
181 unsigned int oversample_rate, clk_rate;
182 int bclk_div, mclk_div;
183 int ret;
184
185 switch (rate) {
186 case 176400:
187 case 88200:
188 case 44100:
189 case 22050:
190 case 11025:
191 clk_rate = 22579200;
192 break;
193
194 case 192000:
195 case 128000:
196 case 96000:
197 case 64000:
198 case 48000:
199 case 32000:
200 case 24000:
201 case 16000:
202 case 12000:
203 case 8000:
204 clk_rate = 24576000;
205 break;
206
207 default:
208 return -EINVAL;
209 }
210
211 ret = clk_set_rate(i2s->mod_clk, clk_rate);
212 if (ret)
213 return ret;
214
215 oversample_rate = i2s->mclk_freq / rate;
216 if (!sun4i_i2s_oversample_is_valid(oversample_rate))
217 return -EINVAL;
218
219 bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
220 word_size);
221 if (bclk_div < 0)
222 return -EINVAL;
223
224 mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
225 clk_rate, rate);
226 if (mclk_div < 0)
227 return -EINVAL;
228
229 regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
230 SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
231 SUN4I_I2S_CLK_DIV_MCLK(mclk_div) |
232 SUN4I_I2S_CLK_DIV_MCLK_EN);
233
234 return 0;
235}
236
237static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
238 struct snd_pcm_hw_params *params,
239 struct snd_soc_dai *dai)
240{
241 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
242 int sr, wss;
243 u32 width;
244
245 if (params_channels(params) != 2)
246 return -EINVAL;
247
248 switch (params_physical_width(params)) {
249 case 16:
250 width = DMA_SLAVE_BUSWIDTH_2_BYTES;
251 break;
252 default:
253 return -EINVAL;
254 }
255 i2s->playback_dma_data.addr_width = width;
256
257 switch (params_width(params)) {
258 case 16:
259 sr = 0;
260 wss = 0;
261 break;
262
263 default:
264 return -EINVAL;
265 }
266
267 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
268 SUN4I_I2S_FMT0_WSS_MASK | SUN4I_I2S_FMT0_SR_MASK,
269 SUN4I_I2S_FMT0_WSS(wss) | SUN4I_I2S_FMT0_SR(sr));
270
271 return sun4i_i2s_set_clk_rate(i2s, params_rate(params),
272 params_width(params));
273}
274
275static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
276{
277 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
278 u32 val;
279
280 /* DAI Mode */
281 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
282 case SND_SOC_DAIFMT_I2S:
283 val = SUN4I_I2S_FMT0_FMT_I2S;
284 break;
285 case SND_SOC_DAIFMT_LEFT_J:
286 val = SUN4I_I2S_FMT0_FMT_LEFT_J;
287 break;
288 case SND_SOC_DAIFMT_RIGHT_J:
289 val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
290 break;
291 default:
292 return -EINVAL;
293 }
294
295 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
296 SUN4I_I2S_FMT0_FMT_MASK,
297 val);
298
299 /* DAI clock polarity */
300 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
301 case SND_SOC_DAIFMT_IB_IF:
302 /* Invert both clocks */
303 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
304 SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
305 break;
306 case SND_SOC_DAIFMT_IB_NF:
307 /* Invert bit clock */
308 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
309 SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL;
310 break;
311 case SND_SOC_DAIFMT_NB_IF:
312 /* Invert frame clock */
313 val = SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED |
314 SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL;
315 break;
316 case SND_SOC_DAIFMT_NB_NF:
317 /* Nothing to do for both normal cases */
318 val = SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL |
319 SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL;
320 break;
321 default:
322 return -EINVAL;
323 }
324
325 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
326 SUN4I_I2S_FMT0_BCLK_POLARITY_MASK |
327 SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK,
328 val);
329
330 /* DAI clock master masks */
331 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
332 case SND_SOC_DAIFMT_CBS_CFS:
333 /* BCLK and LRCLK master */
334 val = SUN4I_I2S_CTRL_MODE_MASTER;
335 break;
336 case SND_SOC_DAIFMT_CBM_CFM:
337 /* BCLK and LRCLK slave */
338 val = SUN4I_I2S_CTRL_MODE_SLAVE;
339 break;
340 default:
341 return -EINVAL;
342 }
343
344 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
345 SUN4I_I2S_CTRL_MODE_MASK,
346 val);
347
348 /* Set significant bits in our FIFOs */
349 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
350 SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
351 SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
352 SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
353 SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
354 return 0;
355}
356
357static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
358{
359 /* Flush RX FIFO */
360 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
361 SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
362 SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
363
364 /* Clear RX counter */
365 regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
366
367 /* Enable RX Block */
368 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
369 SUN4I_I2S_CTRL_RX_EN,
370 SUN4I_I2S_CTRL_RX_EN);
371
372 /* Enable RX DRQ */
373 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
374 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
375 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
376}
377
378static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
379{
380 /* Flush TX FIFO */
381 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
382 SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
383 SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
384
385 /* Clear TX counter */
386 regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
387
388 /* Enable TX Block */
389 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
390 SUN4I_I2S_CTRL_TX_EN,
391 SUN4I_I2S_CTRL_TX_EN);
392
393 /* Enable TX DRQ */
394 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
395 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
396 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
397}
398
399static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
400{
401 /* Disable RX Block */
402 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
403 SUN4I_I2S_CTRL_RX_EN,
404 0);
405
406 /* Disable RX DRQ */
407 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
408 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
409 0);
410}
411
412static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
413{
414 /* Disable TX Block */
415 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
416 SUN4I_I2S_CTRL_TX_EN,
417 0);
418
419 /* Disable TX DRQ */
420 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
421 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
422 0);
423}
424
425static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
426 struct snd_soc_dai *dai)
427{
428 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
429
430 switch (cmd) {
431 case SNDRV_PCM_TRIGGER_START:
432 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
433 case SNDRV_PCM_TRIGGER_RESUME:
434 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
435 sun4i_i2s_start_playback(i2s);
436 else
437 sun4i_i2s_start_capture(i2s);
438 break;
439
440 case SNDRV_PCM_TRIGGER_STOP:
441 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
442 case SNDRV_PCM_TRIGGER_SUSPEND:
443 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
444 sun4i_i2s_stop_playback(i2s);
445 else
446 sun4i_i2s_stop_capture(i2s);
447 break;
448
449 default:
450 return -EINVAL;
451 }
452
453 return 0;
454}
455
456static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
457 struct snd_soc_dai *dai)
458{
459 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
460
461 /* Enable the whole hardware block */
462 regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG,
463 SUN4I_I2S_CTRL_GL_EN);
464
465 /* Enable the first output line */
466 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
467 SUN4I_I2S_CTRL_SDO_EN_MASK,
468 SUN4I_I2S_CTRL_SDO_EN(0));
469
470 /* Enable the first two channels */
471 regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
472 SUN4I_I2S_TX_CHAN_SEL(2));
473
474 /* Map them to the two first samples coming in */
475 regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG,
476 SUN4I_I2S_TX_CHAN_MAP(0, 0) | SUN4I_I2S_TX_CHAN_MAP(1, 1));
477
478 return clk_prepare_enable(i2s->mod_clk);
479}
480
481static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
482 struct snd_soc_dai *dai)
483{
484 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
485
486 clk_disable_unprepare(i2s->mod_clk);
487
488 /* Disable our output lines */
489 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
490 SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
491
492 /* Disable the whole hardware block */
493 regmap_write(i2s->regmap, SUN4I_I2S_CTRL_REG, 0);
494}
495
496static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
497 unsigned int freq, int dir)
498{
499 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
500
501 if (clk_id != 0)
502 return -EINVAL;
503
504 i2s->mclk_freq = freq;
505
506 return 0;
507}
508
509static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
510 .hw_params = sun4i_i2s_hw_params,
511 .set_fmt = sun4i_i2s_set_fmt,
512 .set_sysclk = sun4i_i2s_set_sysclk,
513 .shutdown = sun4i_i2s_shutdown,
514 .startup = sun4i_i2s_startup,
515 .trigger = sun4i_i2s_trigger,
516};
517
518static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
519{
520 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
521
522 snd_soc_dai_init_dma_data(dai,
523 &i2s->playback_dma_data,
524 &i2s->capture_dma_data);
525
526 snd_soc_dai_set_drvdata(dai, i2s);
527
528 return 0;
529}
530
531static struct snd_soc_dai_driver sun4i_i2s_dai = {
532 .probe = sun4i_i2s_dai_probe,
533 .capture = {
534 .stream_name = "Capture",
535 .channels_min = 2,
536 .channels_max = 2,
537 .rates = SNDRV_PCM_RATE_8000_192000,
538 .formats = SNDRV_PCM_FMTBIT_S16_LE,
539 },
540 .playback = {
541 .stream_name = "Playback",
542 .channels_min = 2,
543 .channels_max = 2,
544 .rates = SNDRV_PCM_RATE_8000_192000,
545 .formats = SNDRV_PCM_FMTBIT_S16_LE,
546 },
547 .ops = &sun4i_i2s_dai_ops,
548 .symmetric_rates = 1,
549};
550
551static const struct snd_soc_component_driver sun4i_i2s_component = {
552 .name = "sun4i-dai",
553};
554
555static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
556{
557 switch (reg) {
558 case SUN4I_I2S_FIFO_TX_REG:
559 return false;
560
561 default:
562 return true;
563 }
564}
565
566static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
567{
568 switch (reg) {
569 case SUN4I_I2S_FIFO_RX_REG:
570 case SUN4I_I2S_FIFO_STA_REG:
571 return false;
572
573 default:
574 return true;
575 }
576}
577
578static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
579{
580 switch (reg) {
581 case SUN4I_I2S_FIFO_RX_REG:
582 case SUN4I_I2S_INT_STA_REG:
583 case SUN4I_I2S_RX_CNT_REG:
584 case SUN4I_I2S_TX_CNT_REG:
585 return true;
586
587 default:
588 return false;
589 }
590}
591
592static const struct reg_default sun4i_i2s_reg_defaults[] = {
593 { SUN4I_I2S_CTRL_REG, 0x00000000 },
594 { SUN4I_I2S_FMT0_REG, 0x0000000c },
595 { SUN4I_I2S_FMT1_REG, 0x00004020 },
596 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
597 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
598 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
599 { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
600 { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
601 { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
602 { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
603};
604
605static const struct regmap_config sun4i_i2s_regmap_config = {
606 .reg_bits = 32,
607 .reg_stride = 4,
608 .val_bits = 32,
609 .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
610
611 .cache_type = REGCACHE_FLAT,
612 .reg_defaults = sun4i_i2s_reg_defaults,
613 .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
614 .writeable_reg = sun4i_i2s_wr_reg,
615 .readable_reg = sun4i_i2s_rd_reg,
616 .volatile_reg = sun4i_i2s_volatile_reg,
617};
618
619static int sun4i_i2s_runtime_resume(struct device *dev)
620{
621 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
622 int ret;
623
624 ret = clk_prepare_enable(i2s->bus_clk);
625 if (ret) {
626 dev_err(dev, "Failed to enable bus clock\n");
627 return ret;
628 }
629
630 regcache_cache_only(i2s->regmap, false);
631 regcache_mark_dirty(i2s->regmap);
632
633 ret = regcache_sync(i2s->regmap);
634 if (ret) {
635 dev_err(dev, "Failed to sync regmap cache\n");
636 goto err_disable_clk;
637 }
638
639 return 0;
640
641err_disable_clk:
642 clk_disable_unprepare(i2s->bus_clk);
643 return ret;
644}
645
646static int sun4i_i2s_runtime_suspend(struct device *dev)
647{
648 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
649
650 regcache_cache_only(i2s->regmap, true);
651
652 clk_disable_unprepare(i2s->bus_clk);
653
654 return 0;
655}
656
657struct sun4i_i2s_quirks {
658 bool has_reset;
659};
660
661static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
662 .has_reset = false,
663};
664
665static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
666 .has_reset = true,
667};
668
669static int sun4i_i2s_probe(struct platform_device *pdev)
670{
671 struct sun4i_i2s *i2s;
672 const struct sun4i_i2s_quirks *quirks;
673 struct resource *res;
674 void __iomem *regs;
675 int irq, ret;
676
677 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
678 if (!i2s)
679 return -ENOMEM;
680 platform_set_drvdata(pdev, i2s);
681
682 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
683 regs = devm_ioremap_resource(&pdev->dev, res);
684 if (IS_ERR(regs))
685 return PTR_ERR(regs);
686
687 irq = platform_get_irq(pdev, 0);
688 if (irq < 0) {
689 dev_err(&pdev->dev, "Can't retrieve our interrupt\n");
690 return irq;
691 }
692
693 quirks = of_device_get_match_data(&pdev->dev);
694 if (!quirks) {
695 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
696 return -ENODEV;
697 }
698
699 i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
700 if (IS_ERR(i2s->bus_clk)) {
701 dev_err(&pdev->dev, "Can't get our bus clock\n");
702 return PTR_ERR(i2s->bus_clk);
703 }
704
705 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
706 &sun4i_i2s_regmap_config);
707 if (IS_ERR(i2s->regmap)) {
708 dev_err(&pdev->dev, "Regmap initialisation failed\n");
709 return PTR_ERR(i2s->regmap);
710 }
711
712 i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
713 if (IS_ERR(i2s->mod_clk)) {
714 dev_err(&pdev->dev, "Can't get our mod clock\n");
715 return PTR_ERR(i2s->mod_clk);
716 }
717
718 if (quirks->has_reset) {
719 i2s->rst = devm_reset_control_get(&pdev->dev, NULL);
720 if (IS_ERR(i2s->rst)) {
721 dev_err(&pdev->dev, "Failed to get reset control\n");
722 return PTR_ERR(i2s->rst);
723 }
724 }
725
726 if (!IS_ERR(i2s->rst)) {
727 ret = reset_control_deassert(i2s->rst);
728 if (ret) {
729 dev_err(&pdev->dev,
730 "Failed to deassert the reset control\n");
731 return -EINVAL;
732 }
733 }
734
735 i2s->playback_dma_data.addr = res->start + SUN4I_I2S_FIFO_TX_REG;
736 i2s->playback_dma_data.maxburst = 4;
737
738 i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
739 i2s->capture_dma_data.maxburst = 4;
740
741 pm_runtime_enable(&pdev->dev);
742 if (!pm_runtime_enabled(&pdev->dev)) {
743 ret = sun4i_i2s_runtime_resume(&pdev->dev);
744 if (ret)
745 goto err_pm_disable;
746 }
747
748 ret = devm_snd_soc_register_component(&pdev->dev,
749 &sun4i_i2s_component,
750 &sun4i_i2s_dai, 1);
751 if (ret) {
752 dev_err(&pdev->dev, "Could not register DAI\n");
753 goto err_suspend;
754 }
755
756 ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
757 if (ret) {
758 dev_err(&pdev->dev, "Could not register PCM\n");
759 goto err_suspend;
760 }
761
762 return 0;
763
764err_suspend:
765 if (!pm_runtime_status_suspended(&pdev->dev))
766 sun4i_i2s_runtime_suspend(&pdev->dev);
767err_pm_disable:
768 pm_runtime_disable(&pdev->dev);
769 if (!IS_ERR(i2s->rst))
770 reset_control_assert(i2s->rst);
771
772 return ret;
773}
774
775static int sun4i_i2s_remove(struct platform_device *pdev)
776{
777 struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
778
779 snd_dmaengine_pcm_unregister(&pdev->dev);
780
781 pm_runtime_disable(&pdev->dev);
782 if (!pm_runtime_status_suspended(&pdev->dev))
783 sun4i_i2s_runtime_suspend(&pdev->dev);
784
785 if (!IS_ERR(i2s->rst))
786 reset_control_assert(i2s->rst);
787
788 return 0;
789}
790
791static const struct of_device_id sun4i_i2s_match[] = {
792 {
793 .compatible = "allwinner,sun4i-a10-i2s",
794 .data = &sun4i_a10_i2s_quirks,
795 },
796 {
797 .compatible = "allwinner,sun6i-a31-i2s",
798 .data = &sun6i_a31_i2s_quirks,
799 },
800 {}
801};
802MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
803
804static const struct dev_pm_ops sun4i_i2s_pm_ops = {
805 .runtime_resume = sun4i_i2s_runtime_resume,
806 .runtime_suspend = sun4i_i2s_runtime_suspend,
807};
808
809static struct platform_driver sun4i_i2s_driver = {
810 .probe = sun4i_i2s_probe,
811 .remove = sun4i_i2s_remove,
812 .driver = {
813 .name = "sun4i-i2s",
814 .of_match_table = sun4i_i2s_match,
815 .pm = &sun4i_i2s_pm_ops,
816 },
817};
818module_platform_driver(sun4i_i2s_driver);
819
820MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
821MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
822MODULE_DESCRIPTION("Allwinner A10 I2S driver");
823MODULE_LICENSE("GPL");