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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.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 int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
1085{
1086 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
1087
1088 snd_soc_dai_init_dma_data(dai,
1089 &i2s->playback_dma_data,
1090 &i2s->capture_dma_data);
1091
1092 return 0;
1093}
1094
1095static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
1096 .probe = sun4i_i2s_dai_probe,
1097 .hw_params = sun4i_i2s_hw_params,
1098 .set_fmt = sun4i_i2s_set_fmt,
1099 .set_sysclk = sun4i_i2s_set_sysclk,
1100 .set_tdm_slot = sun4i_i2s_set_tdm_slot,
1101 .trigger = sun4i_i2s_trigger,
1102};
1103
1104#define SUN4I_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
1105 SNDRV_PCM_FMTBIT_S20_LE | \
1106 SNDRV_PCM_FMTBIT_S24_LE)
1107
1108static struct snd_soc_dai_driver sun4i_i2s_dai = {
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 void 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
1621static const struct of_device_id sun4i_i2s_match[] = {
1622 {
1623 .compatible = "allwinner,sun4i-a10-i2s",
1624 .data = &sun4i_a10_i2s_quirks,
1625 },
1626 {
1627 .compatible = "allwinner,sun6i-a31-i2s",
1628 .data = &sun6i_a31_i2s_quirks,
1629 },
1630 {
1631 .compatible = "allwinner,sun8i-a83t-i2s",
1632 .data = &sun8i_a83t_i2s_quirks,
1633 },
1634 {
1635 .compatible = "allwinner,sun8i-h3-i2s",
1636 .data = &sun8i_h3_i2s_quirks,
1637 },
1638 {
1639 .compatible = "allwinner,sun50i-a64-codec-i2s",
1640 .data = &sun50i_a64_codec_i2s_quirks,
1641 },
1642 {
1643 .compatible = "allwinner,sun50i-h6-i2s",
1644 .data = &sun50i_h6_i2s_quirks,
1645 },
1646 {
1647 .compatible = "allwinner,sun50i-r329-i2s",
1648 .data = &sun50i_r329_i2s_quirks,
1649 },
1650 {}
1651};
1652MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
1653
1654static const struct dev_pm_ops sun4i_i2s_pm_ops = {
1655 .runtime_resume = sun4i_i2s_runtime_resume,
1656 .runtime_suspend = sun4i_i2s_runtime_suspend,
1657};
1658
1659static struct platform_driver sun4i_i2s_driver = {
1660 .probe = sun4i_i2s_probe,
1661 .remove_new = sun4i_i2s_remove,
1662 .driver = {
1663 .name = "sun4i-i2s",
1664 .of_match_table = sun4i_i2s_match,
1665 .pm = &sun4i_i2s_pm_ops,
1666 },
1667};
1668module_platform_driver(sun4i_i2s_driver);
1669
1670MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
1671MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
1672MODULE_DESCRIPTION("Allwinner A10 I2S driver");
1673MODULE_LICENSE("GPL");
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_FIFO_TX_REG 0x0c
52#define SUN4I_I2S_FIFO_RX_REG 0x10
53
54#define SUN4I_I2S_FIFO_CTRL_REG 0x14
55#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
56#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
57#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
58#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
59#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
60#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
61
62#define SUN4I_I2S_FIFO_STA_REG 0x18
63
64#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
65#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
66#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
67
68#define SUN4I_I2S_INT_STA_REG 0x20
69
70#define SUN4I_I2S_CLK_DIV_REG 0x24
71#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
72#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
73#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
74#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
75#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
76
77#define SUN4I_I2S_TX_CNT_REG 0x28
78#define SUN4I_I2S_RX_CNT_REG 0x2c
79
80#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
81#define SUN4I_I2S_CHAN_SEL_MASK GENMASK(2, 0)
82#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
83
84#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
85#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
86
87#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
88#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
89
90/* Defines required for sun8i-h3 support */
91#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
92#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
93
94#define SUN8I_I2S_CTRL_MODE_MASK GENMASK(5, 4)
95#define SUN8I_I2S_CTRL_MODE_RIGHT (2 << 4)
96#define SUN8I_I2S_CTRL_MODE_LEFT (1 << 4)
97#define SUN8I_I2S_CTRL_MODE_PCM (0 << 4)
98
99#define SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(19)
100#define SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 19)
101#define SUN8I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 19)
102#define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
103#define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
104#define SUN8I_I2S_FMT0_BCLK_POLARITY_MASK BIT(7)
105#define SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 7)
106#define SUN8I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 7)
107
108#define SUN8I_I2S_INT_STA_REG 0x0c
109#define SUN8I_I2S_FIFO_TX_REG 0x20
110
111#define SUN8I_I2S_CHAN_CFG_REG 0x30
112#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(6, 4)
113#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) ((chan - 1) << 4)
114#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(2, 0)
115#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
116
117#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
118#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
119#define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 12)
120#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
121#define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
122#define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
123
124#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
125#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
126
127struct sun4i_i2s;
128
129/**
130 * struct sun4i_i2s_quirks - Differences between SoC variants.
131 *
132 * @has_reset: SoC needs reset deasserted.
133 * @reg_offset_txdata: offset of the tx fifo.
134 * @sun4i_i2s_regmap: regmap config to use.
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 */
139struct sun4i_i2s_quirks {
140 bool has_reset;
141 unsigned int reg_offset_txdata; /* TX FIFO */
142 const struct regmap_config *sun4i_i2s_regmap;
143
144 /* Register fields for i2s */
145 struct reg_field field_clkdiv_mclk_en;
146 struct reg_field field_fmt_wss;
147 struct reg_field field_fmt_sr;
148
149 const struct sun4i_i2s_clk_div *bclk_dividers;
150 unsigned int num_bclk_dividers;
151 const struct sun4i_i2s_clk_div *mclk_dividers;
152 unsigned int num_mclk_dividers;
153
154 unsigned long (*get_bclk_parent_rate)(const struct sun4i_i2s *);
155 s8 (*get_sr)(const struct sun4i_i2s *, int);
156 s8 (*get_wss)(const struct sun4i_i2s *, int);
157 int (*set_chan_cfg)(const struct sun4i_i2s *,
158 const struct snd_pcm_hw_params *);
159 int (*set_fmt)(const struct sun4i_i2s *, unsigned int);
160};
161
162struct sun4i_i2s {
163 struct clk *bus_clk;
164 struct clk *mod_clk;
165 struct regmap *regmap;
166 struct reset_control *rst;
167
168 unsigned int format;
169 unsigned int mclk_freq;
170 unsigned int slots;
171 unsigned int slot_width;
172
173 struct snd_dmaengine_dai_dma_data capture_dma_data;
174 struct snd_dmaengine_dai_dma_data playback_dma_data;
175
176 /* Register fields for i2s */
177 struct regmap_field *field_clkdiv_mclk_en;
178 struct regmap_field *field_fmt_wss;
179 struct regmap_field *field_fmt_sr;
180
181 const struct sun4i_i2s_quirks *variant;
182};
183
184struct sun4i_i2s_clk_div {
185 u8 div;
186 u8 val;
187};
188
189static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
190 { .div = 2, .val = 0 },
191 { .div = 4, .val = 1 },
192 { .div = 6, .val = 2 },
193 { .div = 8, .val = 3 },
194 { .div = 12, .val = 4 },
195 { .div = 16, .val = 5 },
196 /* TODO - extend divide ratio supported by newer SoCs */
197};
198
199static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
200 { .div = 1, .val = 0 },
201 { .div = 2, .val = 1 },
202 { .div = 4, .val = 2 },
203 { .div = 6, .val = 3 },
204 { .div = 8, .val = 4 },
205 { .div = 12, .val = 5 },
206 { .div = 16, .val = 6 },
207 { .div = 24, .val = 7 },
208 /* TODO - extend divide ratio supported by newer SoCs */
209};
210
211static const struct sun4i_i2s_clk_div sun8i_i2s_clk_div[] = {
212 { .div = 1, .val = 1 },
213 { .div = 2, .val = 2 },
214 { .div = 4, .val = 3 },
215 { .div = 6, .val = 4 },
216 { .div = 8, .val = 5 },
217 { .div = 12, .val = 6 },
218 { .div = 16, .val = 7 },
219 { .div = 24, .val = 8 },
220 { .div = 32, .val = 9 },
221 { .div = 48, .val = 10 },
222 { .div = 64, .val = 11 },
223 { .div = 96, .val = 12 },
224 { .div = 128, .val = 13 },
225 { .div = 176, .val = 14 },
226 { .div = 192, .val = 15 },
227};
228
229static unsigned long sun4i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
230{
231 return i2s->mclk_freq;
232}
233
234static unsigned long sun8i_i2s_get_bclk_parent_rate(const struct sun4i_i2s *i2s)
235{
236 return clk_get_rate(i2s->mod_clk);
237}
238
239static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
240 unsigned long parent_rate,
241 unsigned int sampling_rate,
242 unsigned int channels,
243 unsigned int word_size)
244{
245 const struct sun4i_i2s_clk_div *dividers = i2s->variant->bclk_dividers;
246 int div = parent_rate / sampling_rate / word_size / channels;
247 int i;
248
249 for (i = 0; i < i2s->variant->num_bclk_dividers; i++) {
250 const struct sun4i_i2s_clk_div *bdiv = ÷rs[i];
251
252 if (bdiv->div == div)
253 return bdiv->val;
254 }
255
256 return -EINVAL;
257}
258
259static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
260 unsigned long parent_rate,
261 unsigned long mclk_rate)
262{
263 const struct sun4i_i2s_clk_div *dividers = i2s->variant->mclk_dividers;
264 int div = parent_rate / mclk_rate;
265 int i;
266
267 for (i = 0; i < i2s->variant->num_mclk_dividers; i++) {
268 const struct sun4i_i2s_clk_div *mdiv = ÷rs[i];
269
270 if (mdiv->div == div)
271 return mdiv->val;
272 }
273
274 return -EINVAL;
275}
276
277static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
278static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
279{
280 int i;
281
282 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
283 if (sun4i_i2s_oversample_rates[i] == oversample)
284 return true;
285
286 return false;
287}
288
289static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai,
290 unsigned int rate,
291 unsigned int slots,
292 unsigned int slot_width)
293{
294 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
295 unsigned int oversample_rate, clk_rate, bclk_parent_rate;
296 int bclk_div, mclk_div;
297 int ret;
298
299 switch (rate) {
300 case 176400:
301 case 88200:
302 case 44100:
303 case 22050:
304 case 11025:
305 clk_rate = 22579200;
306 break;
307
308 case 192000:
309 case 128000:
310 case 96000:
311 case 64000:
312 case 48000:
313 case 32000:
314 case 24000:
315 case 16000:
316 case 12000:
317 case 8000:
318 clk_rate = 24576000;
319 break;
320
321 default:
322 dev_err(dai->dev, "Unsupported sample rate: %u\n", rate);
323 return -EINVAL;
324 }
325
326 ret = clk_set_rate(i2s->mod_clk, clk_rate);
327 if (ret)
328 return ret;
329
330 oversample_rate = i2s->mclk_freq / rate;
331 if (!sun4i_i2s_oversample_is_valid(oversample_rate)) {
332 dev_err(dai->dev, "Unsupported oversample rate: %d\n",
333 oversample_rate);
334 return -EINVAL;
335 }
336
337 bclk_parent_rate = i2s->variant->get_bclk_parent_rate(i2s);
338 bclk_div = sun4i_i2s_get_bclk_div(i2s, bclk_parent_rate,
339 rate, slots, slot_width);
340 if (bclk_div < 0) {
341 dev_err(dai->dev, "Unsupported BCLK divider: %d\n", bclk_div);
342 return -EINVAL;
343 }
344
345 mclk_div = sun4i_i2s_get_mclk_div(i2s, clk_rate, i2s->mclk_freq);
346 if (mclk_div < 0) {
347 dev_err(dai->dev, "Unsupported MCLK divider: %d\n", mclk_div);
348 return -EINVAL;
349 }
350
351 regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
352 SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
353 SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
354
355 regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
356
357 return 0;
358}
359
360static s8 sun4i_i2s_get_sr(const struct sun4i_i2s *i2s, int width)
361{
362 if (width < 16 || width > 24)
363 return -EINVAL;
364
365 if (width % 4)
366 return -EINVAL;
367
368 return (width - 16) / 4;
369}
370
371static s8 sun4i_i2s_get_wss(const struct sun4i_i2s *i2s, int width)
372{
373 if (width < 16 || width > 32)
374 return -EINVAL;
375
376 if (width % 4)
377 return -EINVAL;
378
379 return (width - 16) / 4;
380}
381
382static s8 sun8i_i2s_get_sr_wss(const struct sun4i_i2s *i2s, int width)
383{
384 if (width % 4)
385 return -EINVAL;
386
387 if (width < 8 || width > 32)
388 return -EINVAL;
389
390 return (width - 8) / 4 + 1;
391}
392
393static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
394 const struct snd_pcm_hw_params *params)
395{
396 unsigned int channels = params_channels(params);
397
398 /* Map the channels for playback and capture */
399 regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210);
400 regmap_write(i2s->regmap, SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210);
401
402 /* Configure the channels */
403 regmap_update_bits(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
404 SUN4I_I2S_CHAN_SEL_MASK,
405 SUN4I_I2S_CHAN_SEL(channels));
406 regmap_update_bits(i2s->regmap, SUN4I_I2S_RX_CHAN_SEL_REG,
407 SUN4I_I2S_CHAN_SEL_MASK,
408 SUN4I_I2S_CHAN_SEL(channels));
409
410 return 0;
411}
412
413static int sun8i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
414 const struct snd_pcm_hw_params *params)
415{
416 unsigned int channels = params_channels(params);
417 unsigned int slots = channels;
418 unsigned int lrck_period;
419
420 if (i2s->slots)
421 slots = i2s->slots;
422
423 /* Map the channels for playback and capture */
424 regmap_write(i2s->regmap, SUN8I_I2S_TX_CHAN_MAP_REG, 0x76543210);
425 regmap_write(i2s->regmap, SUN8I_I2S_RX_CHAN_MAP_REG, 0x76543210);
426
427 /* Configure the channels */
428 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
429 SUN4I_I2S_CHAN_SEL_MASK,
430 SUN4I_I2S_CHAN_SEL(channels));
431 regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
432 SUN4I_I2S_CHAN_SEL_MASK,
433 SUN4I_I2S_CHAN_SEL(channels));
434
435 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
436 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
437 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
438 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
439 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
440 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
441
442 switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) {
443 case SND_SOC_DAIFMT_DSP_A:
444 case SND_SOC_DAIFMT_DSP_B:
445 case SND_SOC_DAIFMT_LEFT_J:
446 case SND_SOC_DAIFMT_RIGHT_J:
447 lrck_period = params_physical_width(params) * slots;
448 break;
449
450 case SND_SOC_DAIFMT_I2S:
451 lrck_period = params_physical_width(params);
452 break;
453
454 default:
455 return -EINVAL;
456 }
457
458 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
459 SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
460 SUN8I_I2S_FMT0_LRCK_PERIOD(lrck_period));
461
462 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
463 SUN8I_I2S_TX_CHAN_EN_MASK,
464 SUN8I_I2S_TX_CHAN_EN(channels));
465
466 return 0;
467}
468
469static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params *params,
471 struct snd_soc_dai *dai)
472{
473 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
474 unsigned int word_size = params_width(params);
475 unsigned int slot_width = params_physical_width(params);
476 unsigned int channels = params_channels(params);
477 unsigned int slots = channels;
478 int ret, sr, wss;
479 u32 width;
480
481 if (i2s->slots)
482 slots = i2s->slots;
483
484 if (i2s->slot_width)
485 slot_width = i2s->slot_width;
486
487 ret = i2s->variant->set_chan_cfg(i2s, params);
488 if (ret < 0) {
489 dev_err(dai->dev, "Invalid channel configuration\n");
490 return ret;
491 }
492
493 switch (params_physical_width(params)) {
494 case 16:
495 width = DMA_SLAVE_BUSWIDTH_2_BYTES;
496 break;
497 default:
498 dev_err(dai->dev, "Unsupported physical sample width: %d\n",
499 params_physical_width(params));
500 return -EINVAL;
501 }
502 i2s->playback_dma_data.addr_width = width;
503
504 sr = i2s->variant->get_sr(i2s, word_size);
505 if (sr < 0)
506 return -EINVAL;
507
508 wss = i2s->variant->get_wss(i2s, slot_width);
509 if (wss < 0)
510 return -EINVAL;
511
512 regmap_field_write(i2s->field_fmt_wss, wss);
513 regmap_field_write(i2s->field_fmt_sr, sr);
514
515 return sun4i_i2s_set_clk_rate(dai, params_rate(params),
516 slots, slot_width);
517}
518
519static int sun4i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
520 unsigned int fmt)
521{
522 u32 val;
523
524 /* DAI clock polarity */
525 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
526 case SND_SOC_DAIFMT_IB_IF:
527 /* Invert both clocks */
528 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED |
529 SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
530 break;
531 case SND_SOC_DAIFMT_IB_NF:
532 /* Invert bit clock */
533 val = SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED;
534 break;
535 case SND_SOC_DAIFMT_NB_IF:
536 /* Invert frame clock */
537 val = SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
538 break;
539 case SND_SOC_DAIFMT_NB_NF:
540 val = 0;
541 break;
542 default:
543 return -EINVAL;
544 }
545
546 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
547 SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK |
548 SUN4I_I2S_FMT0_BCLK_POLARITY_MASK,
549 val);
550
551 /* DAI Mode */
552 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
553 case SND_SOC_DAIFMT_I2S:
554 val = SUN4I_I2S_FMT0_FMT_I2S;
555 break;
556
557 case SND_SOC_DAIFMT_LEFT_J:
558 val = SUN4I_I2S_FMT0_FMT_LEFT_J;
559 break;
560
561 case SND_SOC_DAIFMT_RIGHT_J:
562 val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
563 break;
564
565 default:
566 return -EINVAL;
567 }
568
569 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
570 SUN4I_I2S_FMT0_FMT_MASK, val);
571
572 /* DAI clock master masks */
573 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
574 case SND_SOC_DAIFMT_CBS_CFS:
575 /* BCLK and LRCLK master */
576 val = SUN4I_I2S_CTRL_MODE_MASTER;
577 break;
578
579 case SND_SOC_DAIFMT_CBM_CFM:
580 /* BCLK and LRCLK slave */
581 val = SUN4I_I2S_CTRL_MODE_SLAVE;
582 break;
583
584 default:
585 return -EINVAL;
586 }
587 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
588 SUN4I_I2S_CTRL_MODE_MASK, val);
589 return 0;
590}
591
592static int sun8i_i2s_set_soc_fmt(const struct sun4i_i2s *i2s,
593 unsigned int fmt)
594{
595 u32 mode, val;
596 u8 offset;
597
598 /*
599 * DAI clock polarity
600 *
601 * The setup for LRCK contradicts the datasheet, but under a
602 * scope it's clear that the LRCK polarity is reversed
603 * compared to the expected polarity on the bus.
604 */
605 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
606 case SND_SOC_DAIFMT_IB_IF:
607 /* Invert both clocks */
608 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED;
609 break;
610 case SND_SOC_DAIFMT_IB_NF:
611 /* Invert bit clock */
612 val = SUN8I_I2S_FMT0_BCLK_POLARITY_INVERTED |
613 SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
614 break;
615 case SND_SOC_DAIFMT_NB_IF:
616 /* Invert frame clock */
617 val = 0;
618 break;
619 case SND_SOC_DAIFMT_NB_NF:
620 val = SUN8I_I2S_FMT0_LRCLK_POLARITY_INVERTED;
621 break;
622 default:
623 return -EINVAL;
624 }
625
626 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
627 SUN8I_I2S_FMT0_LRCLK_POLARITY_MASK |
628 SUN8I_I2S_FMT0_BCLK_POLARITY_MASK,
629 val);
630
631 /* DAI Mode */
632 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
633 case SND_SOC_DAIFMT_DSP_A:
634 mode = SUN8I_I2S_CTRL_MODE_PCM;
635 offset = 1;
636 break;
637
638 case SND_SOC_DAIFMT_DSP_B:
639 mode = SUN8I_I2S_CTRL_MODE_PCM;
640 offset = 0;
641 break;
642
643 case SND_SOC_DAIFMT_I2S:
644 mode = SUN8I_I2S_CTRL_MODE_LEFT;
645 offset = 1;
646 break;
647
648 case SND_SOC_DAIFMT_LEFT_J:
649 mode = SUN8I_I2S_CTRL_MODE_LEFT;
650 offset = 0;
651 break;
652
653 case SND_SOC_DAIFMT_RIGHT_J:
654 mode = SUN8I_I2S_CTRL_MODE_RIGHT;
655 offset = 0;
656 break;
657
658 default:
659 return -EINVAL;
660 }
661
662 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
663 SUN8I_I2S_CTRL_MODE_MASK, mode);
664 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
665 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
666 SUN8I_I2S_TX_CHAN_OFFSET(offset));
667 regmap_update_bits(i2s->regmap, SUN8I_I2S_RX_CHAN_SEL_REG,
668 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
669 SUN8I_I2S_TX_CHAN_OFFSET(offset));
670
671 /* DAI clock master masks */
672 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
673 case SND_SOC_DAIFMT_CBS_CFS:
674 /* BCLK and LRCLK master */
675 val = SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT;
676 break;
677
678 case SND_SOC_DAIFMT_CBM_CFM:
679 /* BCLK and LRCLK slave */
680 val = 0;
681 break;
682
683 default:
684 return -EINVAL;
685 }
686
687 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
688 SUN8I_I2S_CTRL_BCLK_OUT | SUN8I_I2S_CTRL_LRCK_OUT,
689 val);
690
691 return 0;
692}
693
694static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
695{
696 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
697 int ret;
698
699 ret = i2s->variant->set_fmt(i2s, fmt);
700 if (ret) {
701 dev_err(dai->dev, "Unsupported format configuration\n");
702 return ret;
703 }
704
705 /* Set significant bits in our FIFOs */
706 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
707 SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
708 SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
709 SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
710 SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
711
712 i2s->format = fmt;
713
714 return 0;
715}
716
717static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
718{
719 /* Flush RX FIFO */
720 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
721 SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
722 SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
723
724 /* Clear RX counter */
725 regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
726
727 /* Enable RX Block */
728 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
729 SUN4I_I2S_CTRL_RX_EN,
730 SUN4I_I2S_CTRL_RX_EN);
731
732 /* Enable RX DRQ */
733 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
734 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
735 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
736}
737
738static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
739{
740 /* Flush TX FIFO */
741 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
742 SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
743 SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
744
745 /* Clear TX counter */
746 regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
747
748 /* Enable TX Block */
749 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
750 SUN4I_I2S_CTRL_TX_EN,
751 SUN4I_I2S_CTRL_TX_EN);
752
753 /* Enable TX DRQ */
754 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
755 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
756 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
757}
758
759static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
760{
761 /* Disable RX Block */
762 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
763 SUN4I_I2S_CTRL_RX_EN,
764 0);
765
766 /* Disable RX DRQ */
767 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
768 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
769 0);
770}
771
772static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
773{
774 /* Disable TX Block */
775 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
776 SUN4I_I2S_CTRL_TX_EN,
777 0);
778
779 /* Disable TX DRQ */
780 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
781 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
782 0);
783}
784
785static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
786 struct snd_soc_dai *dai)
787{
788 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
789
790 switch (cmd) {
791 case SNDRV_PCM_TRIGGER_START:
792 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
793 case SNDRV_PCM_TRIGGER_RESUME:
794 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
795 sun4i_i2s_start_playback(i2s);
796 else
797 sun4i_i2s_start_capture(i2s);
798 break;
799
800 case SNDRV_PCM_TRIGGER_STOP:
801 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
802 case SNDRV_PCM_TRIGGER_SUSPEND:
803 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
804 sun4i_i2s_stop_playback(i2s);
805 else
806 sun4i_i2s_stop_capture(i2s);
807 break;
808
809 default:
810 return -EINVAL;
811 }
812
813 return 0;
814}
815
816static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
817 unsigned int freq, int dir)
818{
819 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
820
821 if (clk_id != 0)
822 return -EINVAL;
823
824 i2s->mclk_freq = freq;
825
826 return 0;
827}
828
829static int sun4i_i2s_set_tdm_slot(struct snd_soc_dai *dai,
830 unsigned int tx_mask, unsigned int rx_mask,
831 int slots, int slot_width)
832{
833 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
834
835 if (slots > 8)
836 return -EINVAL;
837
838 i2s->slots = slots;
839 i2s->slot_width = slot_width;
840
841 return 0;
842}
843
844static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
845 .hw_params = sun4i_i2s_hw_params,
846 .set_fmt = sun4i_i2s_set_fmt,
847 .set_sysclk = sun4i_i2s_set_sysclk,
848 .set_tdm_slot = sun4i_i2s_set_tdm_slot,
849 .trigger = sun4i_i2s_trigger,
850};
851
852static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
853{
854 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
855
856 snd_soc_dai_init_dma_data(dai,
857 &i2s->playback_dma_data,
858 &i2s->capture_dma_data);
859
860 snd_soc_dai_set_drvdata(dai, i2s);
861
862 return 0;
863}
864
865static struct snd_soc_dai_driver sun4i_i2s_dai = {
866 .probe = sun4i_i2s_dai_probe,
867 .capture = {
868 .stream_name = "Capture",
869 .channels_min = 1,
870 .channels_max = 8,
871 .rates = SNDRV_PCM_RATE_8000_192000,
872 .formats = SNDRV_PCM_FMTBIT_S16_LE,
873 },
874 .playback = {
875 .stream_name = "Playback",
876 .channels_min = 1,
877 .channels_max = 8,
878 .rates = SNDRV_PCM_RATE_8000_192000,
879 .formats = SNDRV_PCM_FMTBIT_S16_LE,
880 },
881 .ops = &sun4i_i2s_dai_ops,
882 .symmetric_rates = 1,
883};
884
885static const struct snd_soc_component_driver sun4i_i2s_component = {
886 .name = "sun4i-dai",
887};
888
889static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
890{
891 switch (reg) {
892 case SUN4I_I2S_FIFO_TX_REG:
893 return false;
894
895 default:
896 return true;
897 }
898}
899
900static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
901{
902 switch (reg) {
903 case SUN4I_I2S_FIFO_RX_REG:
904 case SUN4I_I2S_FIFO_STA_REG:
905 return false;
906
907 default:
908 return true;
909 }
910}
911
912static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
913{
914 switch (reg) {
915 case SUN4I_I2S_FIFO_RX_REG:
916 case SUN4I_I2S_INT_STA_REG:
917 case SUN4I_I2S_RX_CNT_REG:
918 case SUN4I_I2S_TX_CNT_REG:
919 return true;
920
921 default:
922 return false;
923 }
924}
925
926static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
927{
928 switch (reg) {
929 case SUN8I_I2S_FIFO_TX_REG:
930 return false;
931
932 default:
933 return true;
934 }
935}
936
937static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
938{
939 if (reg == SUN8I_I2S_INT_STA_REG)
940 return true;
941 if (reg == SUN8I_I2S_FIFO_TX_REG)
942 return false;
943
944 return sun4i_i2s_volatile_reg(dev, reg);
945}
946
947static const struct reg_default sun4i_i2s_reg_defaults[] = {
948 { SUN4I_I2S_CTRL_REG, 0x00000000 },
949 { SUN4I_I2S_FMT0_REG, 0x0000000c },
950 { SUN4I_I2S_FMT1_REG, 0x00004020 },
951 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
952 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
953 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
954 { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
955 { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
956 { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
957 { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
958};
959
960static const struct reg_default sun8i_i2s_reg_defaults[] = {
961 { SUN4I_I2S_CTRL_REG, 0x00060000 },
962 { SUN4I_I2S_FMT0_REG, 0x00000033 },
963 { SUN4I_I2S_FMT1_REG, 0x00000030 },
964 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
965 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
966 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
967 { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
968 { SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
969 { SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
970 { SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
971 { SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
972};
973
974static const struct regmap_config sun4i_i2s_regmap_config = {
975 .reg_bits = 32,
976 .reg_stride = 4,
977 .val_bits = 32,
978 .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
979
980 .cache_type = REGCACHE_FLAT,
981 .reg_defaults = sun4i_i2s_reg_defaults,
982 .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
983 .writeable_reg = sun4i_i2s_wr_reg,
984 .readable_reg = sun4i_i2s_rd_reg,
985 .volatile_reg = sun4i_i2s_volatile_reg,
986};
987
988static const struct regmap_config sun8i_i2s_regmap_config = {
989 .reg_bits = 32,
990 .reg_stride = 4,
991 .val_bits = 32,
992 .max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
993 .cache_type = REGCACHE_FLAT,
994 .reg_defaults = sun8i_i2s_reg_defaults,
995 .num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
996 .writeable_reg = sun4i_i2s_wr_reg,
997 .readable_reg = sun8i_i2s_rd_reg,
998 .volatile_reg = sun8i_i2s_volatile_reg,
999};
1000
1001static int sun4i_i2s_runtime_resume(struct device *dev)
1002{
1003 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
1004 int ret;
1005
1006 ret = clk_prepare_enable(i2s->bus_clk);
1007 if (ret) {
1008 dev_err(dev, "Failed to enable bus clock\n");
1009 return ret;
1010 }
1011
1012 regcache_cache_only(i2s->regmap, false);
1013 regcache_mark_dirty(i2s->regmap);
1014
1015 ret = regcache_sync(i2s->regmap);
1016 if (ret) {
1017 dev_err(dev, "Failed to sync regmap cache\n");
1018 goto err_disable_clk;
1019 }
1020
1021 /* Enable the whole hardware block */
1022 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1023 SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
1024
1025 /* Enable the first output line */
1026 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1027 SUN4I_I2S_CTRL_SDO_EN_MASK,
1028 SUN4I_I2S_CTRL_SDO_EN(0));
1029
1030 ret = clk_prepare_enable(i2s->mod_clk);
1031 if (ret) {
1032 dev_err(dev, "Failed to enable module clock\n");
1033 goto err_disable_clk;
1034 }
1035
1036 return 0;
1037
1038err_disable_clk:
1039 clk_disable_unprepare(i2s->bus_clk);
1040 return ret;
1041}
1042
1043static int sun4i_i2s_runtime_suspend(struct device *dev)
1044{
1045 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
1046
1047 clk_disable_unprepare(i2s->mod_clk);
1048
1049 /* Disable our output lines */
1050 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1051 SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
1052
1053 /* Disable the whole hardware block */
1054 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
1055 SUN4I_I2S_CTRL_GL_EN, 0);
1056
1057 regcache_cache_only(i2s->regmap, true);
1058
1059 clk_disable_unprepare(i2s->bus_clk);
1060
1061 return 0;
1062}
1063
1064static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
1065 .has_reset = false,
1066 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
1067 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1068 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1069 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1070 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1071 .bclk_dividers = sun4i_i2s_bclk_div,
1072 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1073 .mclk_dividers = sun4i_i2s_mclk_div,
1074 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1075 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1076 .get_sr = sun4i_i2s_get_sr,
1077 .get_wss = sun4i_i2s_get_wss,
1078 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1079 .set_fmt = sun4i_i2s_set_soc_fmt,
1080};
1081
1082static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
1083 .has_reset = true,
1084 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
1085 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1086 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1087 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1088 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1089 .bclk_dividers = sun4i_i2s_bclk_div,
1090 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1091 .mclk_dividers = sun4i_i2s_mclk_div,
1092 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1093 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1094 .get_sr = sun4i_i2s_get_sr,
1095 .get_wss = sun4i_i2s_get_wss,
1096 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1097 .set_fmt = sun4i_i2s_set_soc_fmt,
1098};
1099
1100/*
1101 * This doesn't describe the TDM controller documented in the A83t
1102 * datasheet, but the three undocumented I2S controller that use the
1103 * older design.
1104 */
1105static const struct sun4i_i2s_quirks sun8i_a83t_i2s_quirks = {
1106 .has_reset = true,
1107 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1108 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1109 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1110 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1111 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1112 .bclk_dividers = sun4i_i2s_bclk_div,
1113 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1114 .mclk_dividers = sun4i_i2s_mclk_div,
1115 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1116 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1117 .get_sr = sun4i_i2s_get_sr,
1118 .get_wss = sun4i_i2s_get_wss,
1119 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1120 .set_fmt = sun4i_i2s_set_soc_fmt,
1121};
1122
1123static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
1124 .has_reset = true,
1125 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1126 .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
1127 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
1128 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
1129 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
1130 .bclk_dividers = sun8i_i2s_clk_div,
1131 .num_bclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1132 .mclk_dividers = sun8i_i2s_clk_div,
1133 .num_mclk_dividers = ARRAY_SIZE(sun8i_i2s_clk_div),
1134 .get_bclk_parent_rate = sun8i_i2s_get_bclk_parent_rate,
1135 .get_sr = sun8i_i2s_get_sr_wss,
1136 .get_wss = sun8i_i2s_get_sr_wss,
1137 .set_chan_cfg = sun8i_i2s_set_chan_cfg,
1138 .set_fmt = sun8i_i2s_set_soc_fmt,
1139};
1140
1141static const struct sun4i_i2s_quirks sun50i_a64_codec_i2s_quirks = {
1142 .has_reset = true,
1143 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
1144 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
1145 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
1146 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
1147 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
1148 .bclk_dividers = sun4i_i2s_bclk_div,
1149 .num_bclk_dividers = ARRAY_SIZE(sun4i_i2s_bclk_div),
1150 .mclk_dividers = sun4i_i2s_mclk_div,
1151 .num_mclk_dividers = ARRAY_SIZE(sun4i_i2s_mclk_div),
1152 .get_bclk_parent_rate = sun4i_i2s_get_bclk_parent_rate,
1153 .get_sr = sun4i_i2s_get_sr,
1154 .get_wss = sun4i_i2s_get_wss,
1155 .set_chan_cfg = sun4i_i2s_set_chan_cfg,
1156 .set_fmt = sun4i_i2s_set_soc_fmt,
1157};
1158
1159static int sun4i_i2s_init_regmap_fields(struct device *dev,
1160 struct sun4i_i2s *i2s)
1161{
1162 i2s->field_clkdiv_mclk_en =
1163 devm_regmap_field_alloc(dev, i2s->regmap,
1164 i2s->variant->field_clkdiv_mclk_en);
1165 if (IS_ERR(i2s->field_clkdiv_mclk_en))
1166 return PTR_ERR(i2s->field_clkdiv_mclk_en);
1167
1168 i2s->field_fmt_wss =
1169 devm_regmap_field_alloc(dev, i2s->regmap,
1170 i2s->variant->field_fmt_wss);
1171 if (IS_ERR(i2s->field_fmt_wss))
1172 return PTR_ERR(i2s->field_fmt_wss);
1173
1174 i2s->field_fmt_sr =
1175 devm_regmap_field_alloc(dev, i2s->regmap,
1176 i2s->variant->field_fmt_sr);
1177 if (IS_ERR(i2s->field_fmt_sr))
1178 return PTR_ERR(i2s->field_fmt_sr);
1179
1180 return 0;
1181}
1182
1183static int sun4i_i2s_probe(struct platform_device *pdev)
1184{
1185 struct sun4i_i2s *i2s;
1186 struct resource *res;
1187 void __iomem *regs;
1188 int irq, ret;
1189
1190 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
1191 if (!i2s)
1192 return -ENOMEM;
1193 platform_set_drvdata(pdev, i2s);
1194
1195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1196 regs = devm_ioremap_resource(&pdev->dev, res);
1197 if (IS_ERR(regs))
1198 return PTR_ERR(regs);
1199
1200 irq = platform_get_irq(pdev, 0);
1201 if (irq < 0)
1202 return irq;
1203
1204 i2s->variant = of_device_get_match_data(&pdev->dev);
1205 if (!i2s->variant) {
1206 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
1207 return -ENODEV;
1208 }
1209
1210 i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
1211 if (IS_ERR(i2s->bus_clk)) {
1212 dev_err(&pdev->dev, "Can't get our bus clock\n");
1213 return PTR_ERR(i2s->bus_clk);
1214 }
1215
1216 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
1217 i2s->variant->sun4i_i2s_regmap);
1218 if (IS_ERR(i2s->regmap)) {
1219 dev_err(&pdev->dev, "Regmap initialisation failed\n");
1220 return PTR_ERR(i2s->regmap);
1221 }
1222
1223 i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
1224 if (IS_ERR(i2s->mod_clk)) {
1225 dev_err(&pdev->dev, "Can't get our mod clock\n");
1226 return PTR_ERR(i2s->mod_clk);
1227 }
1228
1229 if (i2s->variant->has_reset) {
1230 i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
1231 if (IS_ERR(i2s->rst)) {
1232 dev_err(&pdev->dev, "Failed to get reset control\n");
1233 return PTR_ERR(i2s->rst);
1234 }
1235 }
1236
1237 if (!IS_ERR(i2s->rst)) {
1238 ret = reset_control_deassert(i2s->rst);
1239 if (ret) {
1240 dev_err(&pdev->dev,
1241 "Failed to deassert the reset control\n");
1242 return -EINVAL;
1243 }
1244 }
1245
1246 i2s->playback_dma_data.addr = res->start +
1247 i2s->variant->reg_offset_txdata;
1248 i2s->playback_dma_data.maxburst = 8;
1249
1250 i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
1251 i2s->capture_dma_data.maxburst = 8;
1252
1253 pm_runtime_enable(&pdev->dev);
1254 if (!pm_runtime_enabled(&pdev->dev)) {
1255 ret = sun4i_i2s_runtime_resume(&pdev->dev);
1256 if (ret)
1257 goto err_pm_disable;
1258 }
1259
1260 ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
1261 if (ret) {
1262 dev_err(&pdev->dev, "Could not initialise regmap fields\n");
1263 goto err_suspend;
1264 }
1265
1266 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1267 if (ret) {
1268 dev_err(&pdev->dev, "Could not register PCM\n");
1269 goto err_suspend;
1270 }
1271
1272 ret = devm_snd_soc_register_component(&pdev->dev,
1273 &sun4i_i2s_component,
1274 &sun4i_i2s_dai, 1);
1275 if (ret) {
1276 dev_err(&pdev->dev, "Could not register DAI\n");
1277 goto err_suspend;
1278 }
1279
1280 return 0;
1281
1282err_suspend:
1283 if (!pm_runtime_status_suspended(&pdev->dev))
1284 sun4i_i2s_runtime_suspend(&pdev->dev);
1285err_pm_disable:
1286 pm_runtime_disable(&pdev->dev);
1287 if (!IS_ERR(i2s->rst))
1288 reset_control_assert(i2s->rst);
1289
1290 return ret;
1291}
1292
1293static int sun4i_i2s_remove(struct platform_device *pdev)
1294{
1295 struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
1296
1297 pm_runtime_disable(&pdev->dev);
1298 if (!pm_runtime_status_suspended(&pdev->dev))
1299 sun4i_i2s_runtime_suspend(&pdev->dev);
1300
1301 if (!IS_ERR(i2s->rst))
1302 reset_control_assert(i2s->rst);
1303
1304 return 0;
1305}
1306
1307static const struct of_device_id sun4i_i2s_match[] = {
1308 {
1309 .compatible = "allwinner,sun4i-a10-i2s",
1310 .data = &sun4i_a10_i2s_quirks,
1311 },
1312 {
1313 .compatible = "allwinner,sun6i-a31-i2s",
1314 .data = &sun6i_a31_i2s_quirks,
1315 },
1316 {
1317 .compatible = "allwinner,sun8i-a83t-i2s",
1318 .data = &sun8i_a83t_i2s_quirks,
1319 },
1320 {
1321 .compatible = "allwinner,sun8i-h3-i2s",
1322 .data = &sun8i_h3_i2s_quirks,
1323 },
1324 {
1325 .compatible = "allwinner,sun50i-a64-codec-i2s",
1326 .data = &sun50i_a64_codec_i2s_quirks,
1327 },
1328 {}
1329};
1330MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
1331
1332static const struct dev_pm_ops sun4i_i2s_pm_ops = {
1333 .runtime_resume = sun4i_i2s_runtime_resume,
1334 .runtime_suspend = sun4i_i2s_runtime_suspend,
1335};
1336
1337static struct platform_driver sun4i_i2s_driver = {
1338 .probe = sun4i_i2s_probe,
1339 .remove = sun4i_i2s_remove,
1340 .driver = {
1341 .name = "sun4i-i2s",
1342 .of_match_table = sun4i_i2s_match,
1343 .pm = &sun4i_i2s_pm_ops,
1344 },
1345};
1346module_platform_driver(sun4i_i2s_driver);
1347
1348MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
1349MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
1350MODULE_DESCRIPTION("Allwinner A10 I2S driver");
1351MODULE_LICENSE("GPL");