1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/sound/soc/m8m/hi6210_i2s.c - I2S IP driver
4 *
5 * Copyright (C) 2015 Linaro, Ltd
6 * Author: Andy Green <andy.green@linaro.org>
7 *
8 * This driver only deals with S2 interface (BT)
9 */
10
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/clk.h>
16 #include <linux/jiffies.h>
17 #include <linux/io.h>
18 #include <linux/gpio.h>
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/dmaengine_pcm.h>
23 #include <sound/initval.h>
24 #include <sound/soc.h>
25 #include <linux/interrupt.h>
26 #include <linux/reset.h>
27 #include <linux/of_address.h>
28 #include <linux/of_irq.h>
29 #include <linux/mfd/syscon.h>
30 #include <linux/reset-controller.h>
31
32 #include "hi6210-i2s.h"
33
34 struct hi6210_i2s {
35 struct device *dev;
36 struct reset_control *rc;
37 struct clk *clk[8];
38 int clocks;
39 struct snd_soc_dai_driver dai;
40 void __iomem *base;
41 struct regmap *sysctrl;
42 phys_addr_t base_phys;
43 struct snd_dmaengine_dai_dma_data dma_data[2];
44 int clk_rate;
45 spinlock_t lock;
46 int rate;
47 int format;
48 u8 bits;
49 u8 channels;
50 u8 id;
51 u8 channel_length;
52 u8 use;
53 u32 master:1;
54 u32 status:1;
55 };
56
57 #define SC_PERIPH_CLKEN1 0x210
58 #define SC_PERIPH_CLKDIS1 0x214
59
60 #define SC_PERIPH_CLKEN3 0x230
61 #define SC_PERIPH_CLKDIS3 0x234
62
63 #define SC_PERIPH_CLKEN12 0x270
64 #define SC_PERIPH_CLKDIS12 0x274
65
66 #define SC_PERIPH_RSTEN1 0x310
67 #define SC_PERIPH_RSTDIS1 0x314
68 #define SC_PERIPH_RSTSTAT1 0x318
69
70 #define SC_PERIPH_RSTEN2 0x320
71 #define SC_PERIPH_RSTDIS2 0x324
72 #define SC_PERIPH_RSTSTAT2 0x328
73
74 #define SOC_PMCTRL_BBPPLLALIAS 0x48
75
76 enum {
77 CLK_DACODEC,
78 CLK_I2S_BASE,
79 };
80
hi6210_write_reg(struct hi6210_i2s * i2s,int reg,u32 val)81 static inline void hi6210_write_reg(struct hi6210_i2s *i2s, int reg, u32 val)
82 {
83 writel(val, i2s->base + reg);
84 }
85
hi6210_read_reg(struct hi6210_i2s * i2s,int reg)86 static inline u32 hi6210_read_reg(struct hi6210_i2s *i2s, int reg)
87 {
88 return readl(i2s->base + reg);
89 }
90
hi6210_i2s_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)91 static int hi6210_i2s_startup(struct snd_pcm_substream *substream,
92 struct snd_soc_dai *cpu_dai)
93 {
94 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
95 int ret, n;
96 u32 val;
97
98 /* deassert reset on ABB */
99 regmap_read(i2s->sysctrl, SC_PERIPH_RSTSTAT2, &val);
100 if (val & BIT(4))
101 regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS2, BIT(4));
102
103 for (n = 0; n < i2s->clocks; n++) {
104 ret = clk_prepare_enable(i2s->clk[n]);
105 if (ret) {
106 while (n--)
107 clk_disable_unprepare(i2s->clk[n]);
108 return ret;
109 }
110 }
111
112 ret = clk_set_rate(i2s->clk[CLK_I2S_BASE], 49152000);
113 if (ret) {
114 dev_err(i2s->dev, "%s: setting 49.152MHz base rate failed %d\n",
115 __func__, ret);
116 return ret;
117 }
118
119 /* enable clock before frequency division */
120 regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN12, BIT(9));
121
122 /* enable codec working clock / == "codec bus clock" */
123 regmap_write(i2s->sysctrl, SC_PERIPH_CLKEN1, BIT(5));
124
125 /* deassert reset on codec / interface clock / working clock */
126 regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5));
127 regmap_write(i2s->sysctrl, SC_PERIPH_RSTDIS1, BIT(5));
128
129 /* not interested in i2s irqs */
130 val = hi6210_read_reg(i2s, HII2S_CODEC_IRQ_MASK);
131 val |= 0x3f;
132 hi6210_write_reg(i2s, HII2S_CODEC_IRQ_MASK, val);
133
134
135 /* reset the stereo downlink fifo */
136 val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1);
137 val |= (BIT(5) | BIT(4));
138 hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val);
139
140 val = hi6210_read_reg(i2s, HII2S_APB_AFIFO_CFG_1);
141 val &= ~(BIT(5) | BIT(4));
142 hi6210_write_reg(i2s, HII2S_APB_AFIFO_CFG_1, val);
143
144
145 val = hi6210_read_reg(i2s, HII2S_SW_RST_N);
146 val &= ~(HII2S_SW_RST_N__ST_DL_WORDLEN_MASK <<
147 HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT);
148 val |= (HII2S_BITS_16 << HII2S_SW_RST_N__ST_DL_WORDLEN_SHIFT);
149 hi6210_write_reg(i2s, HII2S_SW_RST_N, val);
150
151 val = hi6210_read_reg(i2s, HII2S_MISC_CFG);
152 /* mux 11/12 = APB not i2s */
153 val &= ~HII2S_MISC_CFG__ST_DL_TEST_SEL;
154 /* BT R ch 0 = mixer op of DACR ch */
155 val &= ~HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL;
156 val &= ~HII2S_MISC_CFG__S2_DOUT_TEST_SEL;
157
158 val |= HII2S_MISC_CFG__S2_DOUT_RIGHT_SEL;
159 /* BT L ch = 1 = mux 7 = "mixer output of DACL */
160 val |= HII2S_MISC_CFG__S2_DOUT_TEST_SEL;
161 hi6210_write_reg(i2s, HII2S_MISC_CFG, val);
162
163 val = hi6210_read_reg(i2s, HII2S_SW_RST_N);
164 val |= HII2S_SW_RST_N__SW_RST_N;
165 hi6210_write_reg(i2s, HII2S_SW_RST_N, val);
166
167 return 0;
168 }
169
hi6210_i2s_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)170 static void hi6210_i2s_shutdown(struct snd_pcm_substream *substream,
171 struct snd_soc_dai *cpu_dai)
172 {
173 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
174 int n;
175
176 for (n = 0; n < i2s->clocks; n++)
177 clk_disable_unprepare(i2s->clk[n]);
178
179 regmap_write(i2s->sysctrl, SC_PERIPH_RSTEN1, BIT(5));
180 }
181
hi6210_i2s_txctrl(struct snd_soc_dai * cpu_dai,int on)182 static void hi6210_i2s_txctrl(struct snd_soc_dai *cpu_dai, int on)
183 {
184 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
185 u32 val;
186
187 spin_lock(&i2s->lock);
188 if (on) {
189 /* enable S2 TX */
190 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
191 val |= HII2S_I2S_CFG__S2_IF_TX_EN;
192 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
193 } else {
194 /* disable S2 TX */
195 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
196 val &= ~HII2S_I2S_CFG__S2_IF_TX_EN;
197 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
198 }
199 spin_unlock(&i2s->lock);
200 }
201
hi6210_i2s_rxctrl(struct snd_soc_dai * cpu_dai,int on)202 static void hi6210_i2s_rxctrl(struct snd_soc_dai *cpu_dai, int on)
203 {
204 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
205 u32 val;
206
207 spin_lock(&i2s->lock);
208 if (on) {
209 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
210 val |= HII2S_I2S_CFG__S2_IF_RX_EN;
211 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
212 } else {
213 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
214 val &= ~HII2S_I2S_CFG__S2_IF_RX_EN;
215 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
216 }
217 spin_unlock(&i2s->lock);
218 }
219
hi6210_i2s_set_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)220 static int hi6210_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
221 {
222 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
223
224 /*
225 * We don't actually set the hardware until the hw_params
226 * call, but we need to validate the user input here.
227 */
228 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
229 case SND_SOC_DAIFMT_CBM_CFM:
230 case SND_SOC_DAIFMT_CBS_CFS:
231 break;
232 default:
233 return -EINVAL;
234 }
235
236 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
237 case SND_SOC_DAIFMT_I2S:
238 case SND_SOC_DAIFMT_LEFT_J:
239 case SND_SOC_DAIFMT_RIGHT_J:
240 break;
241 default:
242 return -EINVAL;
243 }
244
245 i2s->format = fmt;
246 i2s->master = (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) ==
247 SND_SOC_DAIFMT_CBS_CFS;
248
249 return 0;
250 }
251
hi6210_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * cpu_dai)252 static int hi6210_i2s_hw_params(struct snd_pcm_substream *substream,
253 struct snd_pcm_hw_params *params,
254 struct snd_soc_dai *cpu_dai)
255 {
256 struct hi6210_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
257 u32 bits = 0, rate = 0, signed_data = 0, fmt = 0;
258 u32 val;
259 struct snd_dmaengine_dai_dma_data *dma_data;
260
261 switch (params_format(params)) {
262 case SNDRV_PCM_FORMAT_U16_LE:
263 signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
264 /* fall through */
265 case SNDRV_PCM_FORMAT_S16_LE:
266 bits = HII2S_BITS_16;
267 break;
268 case SNDRV_PCM_FORMAT_U24_LE:
269 signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
270 /* fall through */
271 case SNDRV_PCM_FORMAT_S24_LE:
272 bits = HII2S_BITS_24;
273 break;
274 default:
275 dev_err(cpu_dai->dev, "Bad format\n");
276 return -EINVAL;
277 }
278
279
280 switch (params_rate(params)) {
281 case 8000:
282 rate = HII2S_FS_RATE_8KHZ;
283 break;
284 case 16000:
285 rate = HII2S_FS_RATE_16KHZ;
286 break;
287 case 32000:
288 rate = HII2S_FS_RATE_32KHZ;
289 break;
290 case 48000:
291 rate = HII2S_FS_RATE_48KHZ;
292 break;
293 case 96000:
294 rate = HII2S_FS_RATE_96KHZ;
295 break;
296 case 192000:
297 rate = HII2S_FS_RATE_192KHZ;
298 break;
299 default:
300 dev_err(cpu_dai->dev, "Bad rate: %d\n", params_rate(params));
301 return -EINVAL;
302 }
303
304 if (!(params_channels(params))) {
305 dev_err(cpu_dai->dev, "Bad channels\n");
306 return -EINVAL;
307 }
308
309 dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
310
311 switch (bits) {
312 case HII2S_BITS_24:
313 i2s->bits = 32;
314 dma_data->addr_width = 3;
315 break;
316 default:
317 i2s->bits = 16;
318 dma_data->addr_width = 2;
319 break;
320 }
321 i2s->rate = params_rate(params);
322 i2s->channels = params_channels(params);
323 i2s->channel_length = i2s->channels * i2s->bits;
324
325 val = hi6210_read_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG);
326 val &= ~((HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_MASK <<
327 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) |
328 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_MASK <<
329 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) |
330 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_MASK <<
331 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) |
332 (HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_MASK <<
333 HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT));
334 val |= ((16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AEMPTY_SHIFT) |
335 (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_R_AFULL_SHIFT) |
336 (16 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AEMPTY_SHIFT) |
337 (30 << HII2S_ST_DL_FIFO_TH_CFG__ST_DL_L_AFULL_SHIFT));
338 hi6210_write_reg(i2s, HII2S_ST_DL_FIFO_TH_CFG, val);
339
340
341 val = hi6210_read_reg(i2s, HII2S_IF_CLK_EN_CFG);
342 val |= (BIT(19) | BIT(18) | BIT(17) |
343 HII2S_IF_CLK_EN_CFG__S2_IF_CLK_EN |
344 HII2S_IF_CLK_EN_CFG__S2_OL_MIXER_EN |
345 HII2S_IF_CLK_EN_CFG__S2_OL_SRC_EN |
346 HII2S_IF_CLK_EN_CFG__ST_DL_R_EN |
347 HII2S_IF_CLK_EN_CFG__ST_DL_L_EN);
348 hi6210_write_reg(i2s, HII2S_IF_CLK_EN_CFG, val);
349
350
351 val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG);
352 val &= ~(HII2S_DIG_FILTER_CLK_EN_CFG__DACR_SDM_EN |
353 HII2S_DIG_FILTER_CLK_EN_CFG__DACR_HBF2I_EN |
354 HII2S_DIG_FILTER_CLK_EN_CFG__DACR_AGC_EN |
355 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_SDM_EN |
356 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_HBF2I_EN |
357 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_AGC_EN);
358 val |= (HII2S_DIG_FILTER_CLK_EN_CFG__DACR_MIXER_EN |
359 HII2S_DIG_FILTER_CLK_EN_CFG__DACL_MIXER_EN);
360 hi6210_write_reg(i2s, HII2S_DIG_FILTER_CLK_EN_CFG, val);
361
362
363 val = hi6210_read_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG);
364 val &= ~(HII2S_DIG_FILTER_MODULE_CFG__DACR_MIXER_IN2_MUTE |
365 HII2S_DIG_FILTER_MODULE_CFG__DACL_MIXER_IN2_MUTE);
366 hi6210_write_reg(i2s, HII2S_DIG_FILTER_MODULE_CFG, val);
367
368 val = hi6210_read_reg(i2s, HII2S_MUX_TOP_MODULE_CFG);
369 val &= ~(HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN1_MUTE |
370 HII2S_MUX_TOP_MODULE_CFG__S2_OL_MIXER_IN2_MUTE |
371 HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN1_MUTE |
372 HII2S_MUX_TOP_MODULE_CFG__VOICE_DLINK_MIXER_IN2_MUTE);
373 hi6210_write_reg(i2s, HII2S_MUX_TOP_MODULE_CFG, val);
374
375
376 switch (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) {
377 case SND_SOC_DAIFMT_CBM_CFM:
378 i2s->master = false;
379 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
380 val |= HII2S_I2S_CFG__S2_MST_SLV;
381 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
382 break;
383 case SND_SOC_DAIFMT_CBS_CFS:
384 i2s->master = true;
385 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
386 val &= ~HII2S_I2S_CFG__S2_MST_SLV;
387 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
388 break;
389 default:
390 WARN_ONCE(1, "Invalid i2s->fmt MASTER_MASK. This shouldn't happen\n");
391 return -EINVAL;
392 }
393
394 switch (i2s->format & SND_SOC_DAIFMT_FORMAT_MASK) {
395 case SND_SOC_DAIFMT_I2S:
396 fmt = HII2S_FORMAT_I2S;
397 break;
398 case SND_SOC_DAIFMT_LEFT_J:
399 fmt = HII2S_FORMAT_LEFT_JUST;
400 break;
401 case SND_SOC_DAIFMT_RIGHT_J:
402 fmt = HII2S_FORMAT_RIGHT_JUST;
403 break;
404 default:
405 WARN_ONCE(1, "Invalid i2s->fmt FORMAT_MASK. This shouldn't happen\n");
406 return -EINVAL;
407 }
408
409 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
410 val &= ~(HII2S_I2S_CFG__S2_FUNC_MODE_MASK <<
411 HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT);
412 val |= fmt << HII2S_I2S_CFG__S2_FUNC_MODE_SHIFT;
413 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
414
415
416 val = hi6210_read_reg(i2s, HII2S_CLK_SEL);
417 val &= ~(HII2S_CLK_SEL__I2S_BT_FM_SEL | /* BT gets the I2S */
418 HII2S_CLK_SEL__EXT_12_288MHZ_SEL);
419 hi6210_write_reg(i2s, HII2S_CLK_SEL, val);
420
421 dma_data->maxburst = 2;
422
423 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
424 dma_data->addr = i2s->base_phys + HII2S_ST_DL_CHANNEL;
425 else
426 dma_data->addr = i2s->base_phys + HII2S_STEREO_UPLINK_CHANNEL;
427
428 switch (i2s->channels) {
429 case 1:
430 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
431 val |= HII2S_I2S_CFG__S2_FRAME_MODE;
432 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
433 break;
434 default:
435 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
436 val &= ~HII2S_I2S_CFG__S2_FRAME_MODE;
437 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
438 break;
439 }
440
441 /* clear loopback, set signed type and word length */
442 val = hi6210_read_reg(i2s, HII2S_I2S_CFG);
443 val &= ~HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
444 val &= ~(HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_MASK <<
445 HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT);
446 val &= ~(HII2S_I2S_CFG__S2_DIRECT_LOOP_MASK <<
447 HII2S_I2S_CFG__S2_DIRECT_LOOP_SHIFT);
448 val |= signed_data;
449 val |= (bits << HII2S_I2S_CFG__S2_CODEC_IO_WORDLENGTH_SHIFT);
450 hi6210_write_reg(i2s, HII2S_I2S_CFG, val);
451
452
453 if (!i2s->master)
454 return 0;
455
456 /* set DAC and related units to correct rate */
457 val = hi6210_read_reg(i2s, HII2S_FS_CFG);
458 val &= ~(HII2S_FS_CFG__FS_S2_MASK << HII2S_FS_CFG__FS_S2_SHIFT);
459 val &= ~(HII2S_FS_CFG__FS_DACLR_MASK << HII2S_FS_CFG__FS_DACLR_SHIFT);
460 val &= ~(HII2S_FS_CFG__FS_ST_DL_R_MASK <<
461 HII2S_FS_CFG__FS_ST_DL_R_SHIFT);
462 val &= ~(HII2S_FS_CFG__FS_ST_DL_L_MASK <<
463 HII2S_FS_CFG__FS_ST_DL_L_SHIFT);
464 val |= (rate << HII2S_FS_CFG__FS_S2_SHIFT);
465 val |= (rate << HII2S_FS_CFG__FS_DACLR_SHIFT);
466 val |= (rate << HII2S_FS_CFG__FS_ST_DL_R_SHIFT);
467 val |= (rate << HII2S_FS_CFG__FS_ST_DL_L_SHIFT);
468 hi6210_write_reg(i2s, HII2S_FS_CFG, val);
469
470 return 0;
471 }
472
hi6210_i2s_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * cpu_dai)473 static int hi6210_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
474 struct snd_soc_dai *cpu_dai)
475 {
476 pr_debug("%s\n", __func__);
477 switch (cmd) {
478 case SNDRV_PCM_TRIGGER_START:
479 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
480 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
481 hi6210_i2s_rxctrl(cpu_dai, 1);
482 else
483 hi6210_i2s_txctrl(cpu_dai, 1);
484 break;
485 case SNDRV_PCM_TRIGGER_STOP:
486 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
487 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
488 hi6210_i2s_rxctrl(cpu_dai, 0);
489 else
490 hi6210_i2s_txctrl(cpu_dai, 0);
491 break;
492 default:
493 dev_err(cpu_dai->dev, "unknown cmd\n");
494 return -EINVAL;
495 }
496 return 0;
497 }
498
hi6210_i2s_dai_probe(struct snd_soc_dai * dai)499 static int hi6210_i2s_dai_probe(struct snd_soc_dai *dai)
500 {
501 struct hi6210_i2s *i2s = snd_soc_dai_get_drvdata(dai);
502
503 snd_soc_dai_init_dma_data(dai,
504 &i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
505 &i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
506
507 return 0;
508 }
509
510
511 static const struct snd_soc_dai_ops hi6210_i2s_dai_ops = {
512 .trigger = hi6210_i2s_trigger,
513 .hw_params = hi6210_i2s_hw_params,
514 .set_fmt = hi6210_i2s_set_fmt,
515 .startup = hi6210_i2s_startup,
516 .shutdown = hi6210_i2s_shutdown,
517 };
518
519 static const struct snd_soc_dai_driver hi6210_i2s_dai_init = {
520 .probe = hi6210_i2s_dai_probe,
521 .playback = {
522 .channels_min = 2,
523 .channels_max = 2,
524 .formats = SNDRV_PCM_FMTBIT_S16_LE |
525 SNDRV_PCM_FMTBIT_U16_LE,
526 .rates = SNDRV_PCM_RATE_48000,
527 },
528 .capture = {
529 .channels_min = 2,
530 .channels_max = 2,
531 .formats = SNDRV_PCM_FMTBIT_S16_LE |
532 SNDRV_PCM_FMTBIT_U16_LE,
533 .rates = SNDRV_PCM_RATE_48000,
534 },
535 .ops = &hi6210_i2s_dai_ops,
536 };
537
538 static const struct snd_soc_component_driver hi6210_i2s_i2s_comp = {
539 .name = "hi6210_i2s-i2s",
540 };
541
hi6210_i2s_probe(struct platform_device * pdev)542 static int hi6210_i2s_probe(struct platform_device *pdev)
543 {
544 struct device_node *node = pdev->dev.of_node;
545 struct device *dev = &pdev->dev;
546 struct hi6210_i2s *i2s;
547 struct resource *res;
548 int ret;
549
550 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
551 if (!i2s)
552 return -ENOMEM;
553
554 i2s->dev = dev;
555 spin_lock_init(&i2s->lock);
556
557 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
558 i2s->base = devm_ioremap_resource(dev, res);
559 if (IS_ERR(i2s->base))
560 return PTR_ERR(i2s->base);
561
562 i2s->base_phys = (phys_addr_t)res->start;
563 i2s->dai = hi6210_i2s_dai_init;
564
565 dev_set_drvdata(&pdev->dev, i2s);
566
567 i2s->sysctrl = syscon_regmap_lookup_by_phandle(node,
568 "hisilicon,sysctrl-syscon");
569 if (IS_ERR(i2s->sysctrl))
570 return PTR_ERR(i2s->sysctrl);
571
572 i2s->clk[CLK_DACODEC] = devm_clk_get(&pdev->dev, "dacodec");
573 if (IS_ERR_OR_NULL(i2s->clk[CLK_DACODEC]))
574 return PTR_ERR(i2s->clk[CLK_DACODEC]);
575 i2s->clocks++;
576
577 i2s->clk[CLK_I2S_BASE] = devm_clk_get(&pdev->dev, "i2s-base");
578 if (IS_ERR_OR_NULL(i2s->clk[CLK_I2S_BASE]))
579 return PTR_ERR(i2s->clk[CLK_I2S_BASE]);
580 i2s->clocks++;
581
582 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
583 if (ret)
584 return ret;
585
586 ret = devm_snd_soc_register_component(&pdev->dev, &hi6210_i2s_i2s_comp,
587 &i2s->dai, 1);
588 return ret;
589 }
590
591 static const struct of_device_id hi6210_i2s_dt_ids[] = {
592 { .compatible = "hisilicon,hi6210-i2s" },
593 { /* sentinel */ }
594 };
595
596 MODULE_DEVICE_TABLE(of, hi6210_i2s_dt_ids);
597
598 static struct platform_driver hi6210_i2s_driver = {
599 .probe = hi6210_i2s_probe,
600 .driver = {
601 .name = "hi6210_i2s",
602 .of_match_table = hi6210_i2s_dt_ids,
603 },
604 };
605
606 module_platform_driver(hi6210_i2s_driver);
607
608 MODULE_DESCRIPTION("Hisilicon HI6210 I2S driver");
609 MODULE_AUTHOR("Andy Green <andy.green@linaro.org>");
610 MODULE_LICENSE("GPL");
611
