1 // SPDX-License-Identifier: GPL-2.0-only
2 // ALSA SoC Audio Layer - Rockchip I2S/TDM Controller driver
3
4 // Copyright (c) 2018 Rockchip Electronics Co. Ltd.
5 // Author: Sugar Zhang <sugar.zhang@rock-chips.com>
6 // Author: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
7
8 #include <linux/clk.h>
9 #include <linux/clk-provider.h>
10 #include <linux/delay.h>
11 #include <linux/mfd/syscon.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regmap.h>
16 #include <linux/reset.h>
17 #include <linux/spinlock.h>
18 #include <sound/dmaengine_pcm.h>
19 #include <sound/pcm_params.h>
20
21 #include "rockchip_i2s_tdm.h"
22
23 #define DRV_NAME "rockchip-i2s-tdm"
24
25 #define DEFAULT_MCLK_FS 256
26 #define CH_GRP_MAX 4 /* The max channel 8 / 2 */
27 #define MULTIPLEX_CH_MAX 10
28
29 #define TRCM_TXRX 0
30 #define TRCM_TX 1
31 #define TRCM_RX 2
32
33 struct txrx_config {
34 u32 addr;
35 u32 reg;
36 u32 txonly;
37 u32 rxonly;
38 };
39
40 struct rk_i2s_soc_data {
41 u32 softrst_offset;
42 u32 grf_reg_offset;
43 u32 grf_shift;
44 int config_count;
45 const struct txrx_config *configs;
46 int (*init)(struct device *dev, u32 addr);
47 };
48
49 struct rk_i2s_tdm_dev {
50 struct device *dev;
51 struct clk *hclk;
52 struct clk *mclk_tx;
53 struct clk *mclk_rx;
54 struct regmap *regmap;
55 struct regmap *grf;
56 struct snd_dmaengine_dai_dma_data capture_dma_data;
57 struct snd_dmaengine_dai_dma_data playback_dma_data;
58 struct reset_control *tx_reset;
59 struct reset_control *rx_reset;
60 const struct rk_i2s_soc_data *soc_data;
61 bool is_master_mode;
62 bool io_multiplex;
63 bool tdm_mode;
64 unsigned int frame_width;
65 unsigned int clk_trcm;
66 unsigned int i2s_sdis[CH_GRP_MAX];
67 unsigned int i2s_sdos[CH_GRP_MAX];
68 int refcount;
69 spinlock_t lock; /* xfer lock */
70 bool has_playback;
71 bool has_capture;
72 struct snd_soc_dai_driver *dai;
73 };
74
to_ch_num(unsigned int val)75 static int to_ch_num(unsigned int val)
76 {
77 switch (val) {
78 case I2S_CHN_4:
79 return 4;
80 case I2S_CHN_6:
81 return 6;
82 case I2S_CHN_8:
83 return 8;
84 default:
85 return 2;
86 }
87 }
88
i2s_tdm_disable_unprepare_mclk(struct rk_i2s_tdm_dev * i2s_tdm)89 static void i2s_tdm_disable_unprepare_mclk(struct rk_i2s_tdm_dev *i2s_tdm)
90 {
91 clk_disable_unprepare(i2s_tdm->mclk_tx);
92 clk_disable_unprepare(i2s_tdm->mclk_rx);
93 }
94
95 /**
96 * i2s_tdm_prepare_enable_mclk - prepare to enable all mclks, disable them on
97 * failure.
98 * @i2s_tdm: rk_i2s_tdm_dev struct
99 *
100 * This function attempts to enable all mclk clocks, but cleans up after
101 * itself on failure. Guarantees to balance its calls.
102 *
103 * Returns success (0) or negative errno.
104 */
i2s_tdm_prepare_enable_mclk(struct rk_i2s_tdm_dev * i2s_tdm)105 static int i2s_tdm_prepare_enable_mclk(struct rk_i2s_tdm_dev *i2s_tdm)
106 {
107 int ret = 0;
108
109 ret = clk_prepare_enable(i2s_tdm->mclk_tx);
110 if (ret)
111 goto err_mclk_tx;
112 ret = clk_prepare_enable(i2s_tdm->mclk_rx);
113 if (ret)
114 goto err_mclk_rx;
115
116 return 0;
117
118 err_mclk_rx:
119 clk_disable_unprepare(i2s_tdm->mclk_tx);
120 err_mclk_tx:
121 return ret;
122 }
123
i2s_tdm_runtime_suspend(struct device * dev)124 static int __maybe_unused i2s_tdm_runtime_suspend(struct device *dev)
125 {
126 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
127
128 regcache_cache_only(i2s_tdm->regmap, true);
129 i2s_tdm_disable_unprepare_mclk(i2s_tdm);
130
131 clk_disable_unprepare(i2s_tdm->hclk);
132
133 return 0;
134 }
135
i2s_tdm_runtime_resume(struct device * dev)136 static int __maybe_unused i2s_tdm_runtime_resume(struct device *dev)
137 {
138 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
139 int ret;
140
141 ret = clk_prepare_enable(i2s_tdm->hclk);
142 if (ret)
143 goto err_hclk;
144
145 ret = i2s_tdm_prepare_enable_mclk(i2s_tdm);
146 if (ret)
147 goto err_mclk;
148
149 regcache_cache_only(i2s_tdm->regmap, false);
150 regcache_mark_dirty(i2s_tdm->regmap);
151
152 ret = regcache_sync(i2s_tdm->regmap);
153 if (ret)
154 goto err_regcache;
155
156 return 0;
157
158 err_regcache:
159 i2s_tdm_disable_unprepare_mclk(i2s_tdm);
160 err_mclk:
161 clk_disable_unprepare(i2s_tdm->hclk);
162 err_hclk:
163 return ret;
164 }
165
to_info(struct snd_soc_dai * dai)166 static inline struct rk_i2s_tdm_dev *to_info(struct snd_soc_dai *dai)
167 {
168 return snd_soc_dai_get_drvdata(dai);
169 }
170
171 /*
172 * Makes sure that both tx and rx are reset at the same time to sync lrck
173 * when clk_trcm > 0.
174 */
rockchip_snd_xfer_sync_reset(struct rk_i2s_tdm_dev * i2s_tdm)175 static void rockchip_snd_xfer_sync_reset(struct rk_i2s_tdm_dev *i2s_tdm)
176 {
177 /* This is technically race-y.
178 *
179 * In an ideal world, we could atomically assert both resets at the
180 * same time, through an atomic bulk reset API. This API however does
181 * not exist, so what the downstream vendor code used to do was
182 * implement half a reset controller here and require the CRU to be
183 * passed to the driver as a device tree node. Violating abstractions
184 * like that is bad, especially when it influences something like the
185 * bindings which are supposed to describe the hardware, not whatever
186 * workarounds the driver needs, so it was dropped.
187 *
188 * In practice, asserting the resets one by one appears to work just
189 * fine for playback. During duplex (playback + capture) operation,
190 * this might become an issue, but that should be solved by the
191 * implementation of the aforementioned API, not by shoving a reset
192 * controller into an audio driver.
193 */
194
195 reset_control_assert(i2s_tdm->tx_reset);
196 reset_control_assert(i2s_tdm->rx_reset);
197 udelay(10);
198 reset_control_deassert(i2s_tdm->tx_reset);
199 reset_control_deassert(i2s_tdm->rx_reset);
200 udelay(10);
201 }
202
rockchip_snd_reset(struct reset_control * rc)203 static void rockchip_snd_reset(struct reset_control *rc)
204 {
205 reset_control_assert(rc);
206 udelay(10);
207 reset_control_deassert(rc);
208 udelay(10);
209 }
210
rockchip_snd_xfer_clear(struct rk_i2s_tdm_dev * i2s_tdm,unsigned int clr)211 static void rockchip_snd_xfer_clear(struct rk_i2s_tdm_dev *i2s_tdm,
212 unsigned int clr)
213 {
214 unsigned int xfer_mask = 0;
215 unsigned int xfer_val = 0;
216 unsigned int val;
217 int retry = 10;
218 bool tx = clr & I2S_CLR_TXC;
219 bool rx = clr & I2S_CLR_RXC;
220
221 if (!(rx || tx))
222 return;
223
224 if (tx) {
225 xfer_mask = I2S_XFER_TXS_START;
226 xfer_val = I2S_XFER_TXS_STOP;
227 }
228 if (rx) {
229 xfer_mask |= I2S_XFER_RXS_START;
230 xfer_val |= I2S_XFER_RXS_STOP;
231 }
232
233 regmap_update_bits(i2s_tdm->regmap, I2S_XFER, xfer_mask, xfer_val);
234 udelay(150);
235 regmap_update_bits(i2s_tdm->regmap, I2S_CLR, clr, clr);
236
237 regmap_read(i2s_tdm->regmap, I2S_CLR, &val);
238 /* Wait on the clear operation to finish */
239 while (val) {
240 udelay(15);
241 regmap_read(i2s_tdm->regmap, I2S_CLR, &val);
242 retry--;
243 if (!retry) {
244 dev_warn(i2s_tdm->dev, "clear failed, reset %s%s\n",
245 tx ? "tx" : "", rx ? "rx" : "");
246 if (rx && tx)
247 rockchip_snd_xfer_sync_reset(i2s_tdm);
248 else if (tx)
249 rockchip_snd_reset(i2s_tdm->tx_reset);
250 else if (rx)
251 rockchip_snd_reset(i2s_tdm->rx_reset);
252 break;
253 }
254 }
255 }
256
rockchip_enable_tde(struct regmap * regmap)257 static inline void rockchip_enable_tde(struct regmap *regmap)
258 {
259 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE,
260 I2S_DMACR_TDE_ENABLE);
261 }
262
rockchip_disable_tde(struct regmap * regmap)263 static inline void rockchip_disable_tde(struct regmap *regmap)
264 {
265 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_TDE_ENABLE,
266 I2S_DMACR_TDE_DISABLE);
267 }
268
rockchip_enable_rde(struct regmap * regmap)269 static inline void rockchip_enable_rde(struct regmap *regmap)
270 {
271 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE,
272 I2S_DMACR_RDE_ENABLE);
273 }
274
rockchip_disable_rde(struct regmap * regmap)275 static inline void rockchip_disable_rde(struct regmap *regmap)
276 {
277 regmap_update_bits(regmap, I2S_DMACR, I2S_DMACR_RDE_ENABLE,
278 I2S_DMACR_RDE_DISABLE);
279 }
280
281 /* only used when clk_trcm > 0 */
rockchip_snd_txrxctrl(struct snd_pcm_substream * substream,struct snd_soc_dai * dai,int on)282 static void rockchip_snd_txrxctrl(struct snd_pcm_substream *substream,
283 struct snd_soc_dai *dai, int on)
284 {
285 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
286 unsigned long flags;
287
288 spin_lock_irqsave(&i2s_tdm->lock, flags);
289 if (on) {
290 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
291 rockchip_enable_tde(i2s_tdm->regmap);
292 else
293 rockchip_enable_rde(i2s_tdm->regmap);
294
295 if (++i2s_tdm->refcount == 1) {
296 rockchip_snd_xfer_sync_reset(i2s_tdm);
297 regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
298 I2S_XFER_TXS_START |
299 I2S_XFER_RXS_START,
300 I2S_XFER_TXS_START |
301 I2S_XFER_RXS_START);
302 }
303 } else {
304 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
305 rockchip_disable_tde(i2s_tdm->regmap);
306 else
307 rockchip_disable_rde(i2s_tdm->regmap);
308
309 if (--i2s_tdm->refcount == 0) {
310 rockchip_snd_xfer_clear(i2s_tdm,
311 I2S_CLR_TXC | I2S_CLR_RXC);
312 }
313 }
314 spin_unlock_irqrestore(&i2s_tdm->lock, flags);
315 }
316
rockchip_snd_txctrl(struct rk_i2s_tdm_dev * i2s_tdm,int on)317 static void rockchip_snd_txctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on)
318 {
319 if (on) {
320 rockchip_enable_tde(i2s_tdm->regmap);
321
322 regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
323 I2S_XFER_TXS_START,
324 I2S_XFER_TXS_START);
325 } else {
326 rockchip_disable_tde(i2s_tdm->regmap);
327
328 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC);
329 }
330 }
331
rockchip_snd_rxctrl(struct rk_i2s_tdm_dev * i2s_tdm,int on)332 static void rockchip_snd_rxctrl(struct rk_i2s_tdm_dev *i2s_tdm, int on)
333 {
334 if (on) {
335 rockchip_enable_rde(i2s_tdm->regmap);
336
337 regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
338 I2S_XFER_RXS_START,
339 I2S_XFER_RXS_START);
340 } else {
341 rockchip_disable_rde(i2s_tdm->regmap);
342
343 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_RXC);
344 }
345 }
346
rockchip_i2s_tdm_set_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)347 static int rockchip_i2s_tdm_set_fmt(struct snd_soc_dai *cpu_dai,
348 unsigned int fmt)
349 {
350 struct rk_i2s_tdm_dev *i2s_tdm = to_info(cpu_dai);
351 unsigned int mask, val, tdm_val, txcr_val, rxcr_val;
352 int ret;
353 bool is_tdm = i2s_tdm->tdm_mode;
354
355 ret = pm_runtime_resume_and_get(cpu_dai->dev);
356 if (ret < 0 && ret != -EACCES)
357 return ret;
358
359 mask = I2S_CKR_MSS_MASK;
360 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
361 case SND_SOC_DAIFMT_BP_FP:
362 val = I2S_CKR_MSS_MASTER;
363 i2s_tdm->is_master_mode = true;
364 break;
365 case SND_SOC_DAIFMT_BC_FC:
366 val = I2S_CKR_MSS_SLAVE;
367 i2s_tdm->is_master_mode = false;
368 break;
369 default:
370 ret = -EINVAL;
371 goto err_pm_put;
372 }
373
374 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, mask, val);
375
376 mask = I2S_CKR_CKP_MASK | I2S_CKR_TLP_MASK | I2S_CKR_RLP_MASK;
377 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
378 case SND_SOC_DAIFMT_NB_NF:
379 val = I2S_CKR_CKP_NORMAL |
380 I2S_CKR_TLP_NORMAL |
381 I2S_CKR_RLP_NORMAL;
382 break;
383 case SND_SOC_DAIFMT_NB_IF:
384 val = I2S_CKR_CKP_NORMAL |
385 I2S_CKR_TLP_INVERTED |
386 I2S_CKR_RLP_INVERTED;
387 break;
388 case SND_SOC_DAIFMT_IB_NF:
389 val = I2S_CKR_CKP_INVERTED |
390 I2S_CKR_TLP_NORMAL |
391 I2S_CKR_RLP_NORMAL;
392 break;
393 case SND_SOC_DAIFMT_IB_IF:
394 val = I2S_CKR_CKP_INVERTED |
395 I2S_CKR_TLP_INVERTED |
396 I2S_CKR_RLP_INVERTED;
397 break;
398 default:
399 ret = -EINVAL;
400 goto err_pm_put;
401 }
402
403 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, mask, val);
404
405 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
406 case SND_SOC_DAIFMT_RIGHT_J:
407 txcr_val = I2S_TXCR_IBM_RSJM;
408 rxcr_val = I2S_RXCR_IBM_RSJM;
409 break;
410 case SND_SOC_DAIFMT_LEFT_J:
411 txcr_val = I2S_TXCR_IBM_LSJM;
412 rxcr_val = I2S_RXCR_IBM_LSJM;
413 break;
414 case SND_SOC_DAIFMT_I2S:
415 txcr_val = I2S_TXCR_IBM_NORMAL;
416 rxcr_val = I2S_RXCR_IBM_NORMAL;
417 break;
418 case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 mode */
419 txcr_val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1);
420 rxcr_val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1);
421 break;
422 case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
423 txcr_val = I2S_TXCR_TFS_PCM;
424 rxcr_val = I2S_RXCR_TFS_PCM;
425 break;
426 default:
427 ret = -EINVAL;
428 goto err_pm_put;
429 }
430
431 mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK;
432 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, txcr_val);
433
434 mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK;
435 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, rxcr_val);
436
437 if (is_tdm) {
438 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
439 case SND_SOC_DAIFMT_RIGHT_J:
440 val = I2S_TXCR_TFS_TDM_I2S;
441 tdm_val = TDM_SHIFT_CTRL(2);
442 break;
443 case SND_SOC_DAIFMT_LEFT_J:
444 val = I2S_TXCR_TFS_TDM_I2S;
445 tdm_val = TDM_SHIFT_CTRL(1);
446 break;
447 case SND_SOC_DAIFMT_I2S:
448 val = I2S_TXCR_TFS_TDM_I2S;
449 tdm_val = TDM_SHIFT_CTRL(0);
450 break;
451 case SND_SOC_DAIFMT_DSP_A:
452 val = I2S_TXCR_TFS_TDM_PCM;
453 tdm_val = TDM_SHIFT_CTRL(0);
454 break;
455 case SND_SOC_DAIFMT_DSP_B:
456 val = I2S_TXCR_TFS_TDM_PCM;
457 tdm_val = TDM_SHIFT_CTRL(2);
458 break;
459 default:
460 ret = -EINVAL;
461 goto err_pm_put;
462 }
463
464 tdm_val |= TDM_FSYNC_WIDTH_SEL1(1);
465 tdm_val |= TDM_FSYNC_WIDTH_HALF_FRAME;
466
467 mask = I2S_TXCR_TFS_MASK;
468 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR, mask, val);
469 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR, mask, val);
470
471 mask = TDM_FSYNC_WIDTH_SEL1_MSK | TDM_FSYNC_WIDTH_SEL0_MSK |
472 TDM_SHIFT_CTRL_MSK;
473 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR,
474 mask, tdm_val);
475 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR,
476 mask, tdm_val);
477 }
478
479 err_pm_put:
480 pm_runtime_put(cpu_dai->dev);
481
482 return ret;
483 }
484
rockchip_i2s_tdm_xfer_pause(struct snd_pcm_substream * substream,struct rk_i2s_tdm_dev * i2s_tdm)485 static void rockchip_i2s_tdm_xfer_pause(struct snd_pcm_substream *substream,
486 struct rk_i2s_tdm_dev *i2s_tdm)
487 {
488 int stream;
489
490 stream = SNDRV_PCM_STREAM_LAST - substream->stream;
491 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
492 rockchip_disable_tde(i2s_tdm->regmap);
493 else
494 rockchip_disable_rde(i2s_tdm->regmap);
495
496 rockchip_snd_xfer_clear(i2s_tdm, I2S_CLR_TXC | I2S_CLR_RXC);
497 }
498
rockchip_i2s_tdm_xfer_resume(struct snd_pcm_substream * substream,struct rk_i2s_tdm_dev * i2s_tdm)499 static void rockchip_i2s_tdm_xfer_resume(struct snd_pcm_substream *substream,
500 struct rk_i2s_tdm_dev *i2s_tdm)
501 {
502 int stream;
503
504 stream = SNDRV_PCM_STREAM_LAST - substream->stream;
505 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
506 rockchip_enable_tde(i2s_tdm->regmap);
507 else
508 rockchip_enable_rde(i2s_tdm->regmap);
509
510 regmap_update_bits(i2s_tdm->regmap, I2S_XFER,
511 I2S_XFER_TXS_START |
512 I2S_XFER_RXS_START,
513 I2S_XFER_TXS_START |
514 I2S_XFER_RXS_START);
515 }
516
rockchip_i2s_ch_to_io(unsigned int ch,bool substream_capture)517 static int rockchip_i2s_ch_to_io(unsigned int ch, bool substream_capture)
518 {
519 if (substream_capture) {
520 switch (ch) {
521 case I2S_CHN_4:
522 return I2S_IO_6CH_OUT_4CH_IN;
523 case I2S_CHN_6:
524 return I2S_IO_4CH_OUT_6CH_IN;
525 case I2S_CHN_8:
526 return I2S_IO_2CH_OUT_8CH_IN;
527 default:
528 return I2S_IO_8CH_OUT_2CH_IN;
529 }
530 } else {
531 switch (ch) {
532 case I2S_CHN_4:
533 return I2S_IO_4CH_OUT_6CH_IN;
534 case I2S_CHN_6:
535 return I2S_IO_6CH_OUT_4CH_IN;
536 case I2S_CHN_8:
537 return I2S_IO_8CH_OUT_2CH_IN;
538 default:
539 return I2S_IO_2CH_OUT_8CH_IN;
540 }
541 }
542 }
543
rockchip_i2s_io_multiplex(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)544 static int rockchip_i2s_io_multiplex(struct snd_pcm_substream *substream,
545 struct snd_soc_dai *dai)
546 {
547 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
548 int usable_chs = MULTIPLEX_CH_MAX;
549 unsigned int val = 0;
550
551 if (!i2s_tdm->io_multiplex)
552 return 0;
553
554 if (IS_ERR_OR_NULL(i2s_tdm->grf)) {
555 dev_err(i2s_tdm->dev,
556 "io multiplex not supported for this device\n");
557 return -EINVAL;
558 }
559
560 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
561 struct snd_pcm_str *playback_str =
562 &substream->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK];
563
564 if (playback_str->substream_opened) {
565 regmap_read(i2s_tdm->regmap, I2S_TXCR, &val);
566 val &= I2S_TXCR_CSR_MASK;
567 usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val);
568 }
569
570 regmap_read(i2s_tdm->regmap, I2S_RXCR, &val);
571 val &= I2S_RXCR_CSR_MASK;
572
573 if (to_ch_num(val) > usable_chs) {
574 dev_err(i2s_tdm->dev,
575 "Capture channels (%d) > usable channels (%d)\n",
576 to_ch_num(val), usable_chs);
577 return -EINVAL;
578 }
579
580 rockchip_i2s_ch_to_io(val, true);
581 } else {
582 struct snd_pcm_str *capture_str =
583 &substream->pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
584
585 if (capture_str->substream_opened) {
586 regmap_read(i2s_tdm->regmap, I2S_RXCR, &val);
587 val &= I2S_RXCR_CSR_MASK;
588 usable_chs = MULTIPLEX_CH_MAX - to_ch_num(val);
589 }
590
591 regmap_read(i2s_tdm->regmap, I2S_TXCR, &val);
592 val &= I2S_TXCR_CSR_MASK;
593
594 if (to_ch_num(val) > usable_chs) {
595 dev_err(i2s_tdm->dev,
596 "Playback channels (%d) > usable channels (%d)\n",
597 to_ch_num(val), usable_chs);
598 return -EINVAL;
599 }
600 }
601
602 val <<= i2s_tdm->soc_data->grf_shift;
603 val |= (I2S_IO_DIRECTION_MASK << i2s_tdm->soc_data->grf_shift) << 16;
604 regmap_write(i2s_tdm->grf, i2s_tdm->soc_data->grf_reg_offset, val);
605
606 return 0;
607 }
608
rockchip_i2s_trcm_mode(struct snd_pcm_substream * substream,struct snd_soc_dai * dai,unsigned int div_bclk,unsigned int div_lrck,unsigned int fmt)609 static int rockchip_i2s_trcm_mode(struct snd_pcm_substream *substream,
610 struct snd_soc_dai *dai,
611 unsigned int div_bclk,
612 unsigned int div_lrck,
613 unsigned int fmt)
614 {
615 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
616 unsigned long flags;
617
618 if (!i2s_tdm->clk_trcm)
619 return 0;
620
621 spin_lock_irqsave(&i2s_tdm->lock, flags);
622 if (i2s_tdm->refcount)
623 rockchip_i2s_tdm_xfer_pause(substream, i2s_tdm);
624
625 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
626 I2S_CLKDIV_TXM_MASK | I2S_CLKDIV_RXM_MASK,
627 I2S_CLKDIV_TXM(div_bclk) | I2S_CLKDIV_RXM(div_bclk));
628 regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
629 I2S_CKR_TSD_MASK | I2S_CKR_RSD_MASK,
630 I2S_CKR_TSD(div_lrck) | I2S_CKR_RSD(div_lrck));
631
632 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
633 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
634 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
635 fmt);
636 else
637 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
638 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
639 fmt);
640
641 if (i2s_tdm->refcount)
642 rockchip_i2s_tdm_xfer_resume(substream, i2s_tdm);
643 spin_unlock_irqrestore(&i2s_tdm->lock, flags);
644
645 return 0;
646 }
647
rockchip_i2s_tdm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)648 static int rockchip_i2s_tdm_hw_params(struct snd_pcm_substream *substream,
649 struct snd_pcm_hw_params *params,
650 struct snd_soc_dai *dai)
651 {
652 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
653 unsigned int val = 0;
654 unsigned int mclk_rate, bclk_rate, div_bclk = 4, div_lrck = 64;
655 int err;
656
657 if (i2s_tdm->is_master_mode) {
658 struct clk *mclk;
659
660 if (i2s_tdm->clk_trcm == TRCM_TX) {
661 mclk = i2s_tdm->mclk_tx;
662 } else if (i2s_tdm->clk_trcm == TRCM_RX) {
663 mclk = i2s_tdm->mclk_rx;
664 } else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
665 mclk = i2s_tdm->mclk_tx;
666 } else {
667 mclk = i2s_tdm->mclk_rx;
668 }
669
670 err = clk_set_rate(mclk, DEFAULT_MCLK_FS * params_rate(params));
671 if (err)
672 return err;
673
674 mclk_rate = clk_get_rate(mclk);
675 bclk_rate = i2s_tdm->frame_width * params_rate(params);
676 if (!bclk_rate)
677 return -EINVAL;
678
679 div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate);
680 div_lrck = bclk_rate / params_rate(params);
681 }
682
683 switch (params_format(params)) {
684 case SNDRV_PCM_FORMAT_S8:
685 val |= I2S_TXCR_VDW(8);
686 break;
687 case SNDRV_PCM_FORMAT_S16_LE:
688 val |= I2S_TXCR_VDW(16);
689 break;
690 case SNDRV_PCM_FORMAT_S20_3LE:
691 val |= I2S_TXCR_VDW(20);
692 break;
693 case SNDRV_PCM_FORMAT_S24_LE:
694 val |= I2S_TXCR_VDW(24);
695 break;
696 case SNDRV_PCM_FORMAT_S32_LE:
697 val |= I2S_TXCR_VDW(32);
698 break;
699 default:
700 return -EINVAL;
701 }
702
703 switch (params_channels(params)) {
704 case 8:
705 val |= I2S_CHN_8;
706 break;
707 case 6:
708 val |= I2S_CHN_6;
709 break;
710 case 4:
711 val |= I2S_CHN_4;
712 break;
713 case 2:
714 val |= I2S_CHN_2;
715 break;
716 default:
717 return -EINVAL;
718 }
719
720 if (i2s_tdm->clk_trcm) {
721 rockchip_i2s_trcm_mode(substream, dai, div_bclk, div_lrck, val);
722 } else if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
723 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
724 I2S_CLKDIV_TXM_MASK,
725 I2S_CLKDIV_TXM(div_bclk));
726 regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
727 I2S_CKR_TSD_MASK,
728 I2S_CKR_TSD(div_lrck));
729 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
730 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
731 val);
732 } else {
733 regmap_update_bits(i2s_tdm->regmap, I2S_CLKDIV,
734 I2S_CLKDIV_RXM_MASK,
735 I2S_CLKDIV_RXM(div_bclk));
736 regmap_update_bits(i2s_tdm->regmap, I2S_CKR,
737 I2S_CKR_RSD_MASK,
738 I2S_CKR_RSD(div_lrck));
739 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
740 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
741 val);
742 }
743
744 return rockchip_i2s_io_multiplex(substream, dai);
745 }
746
rockchip_i2s_tdm_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)747 static int rockchip_i2s_tdm_trigger(struct snd_pcm_substream *substream,
748 int cmd, struct snd_soc_dai *dai)
749 {
750 struct rk_i2s_tdm_dev *i2s_tdm = to_info(dai);
751
752 switch (cmd) {
753 case SNDRV_PCM_TRIGGER_START:
754 case SNDRV_PCM_TRIGGER_RESUME:
755 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
756 if (i2s_tdm->clk_trcm)
757 rockchip_snd_txrxctrl(substream, dai, 1);
758 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
759 rockchip_snd_rxctrl(i2s_tdm, 1);
760 else
761 rockchip_snd_txctrl(i2s_tdm, 1);
762 break;
763 case SNDRV_PCM_TRIGGER_SUSPEND:
764 case SNDRV_PCM_TRIGGER_STOP:
765 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
766 if (i2s_tdm->clk_trcm)
767 rockchip_snd_txrxctrl(substream, dai, 0);
768 else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
769 rockchip_snd_rxctrl(i2s_tdm, 0);
770 else
771 rockchip_snd_txctrl(i2s_tdm, 0);
772 break;
773 default:
774 return -EINVAL;
775 }
776
777 return 0;
778 }
779
rockchip_i2s_tdm_dai_probe(struct snd_soc_dai * dai)780 static int rockchip_i2s_tdm_dai_probe(struct snd_soc_dai *dai)
781 {
782 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
783
784 if (i2s_tdm->has_capture)
785 snd_soc_dai_dma_data_set_capture(dai, &i2s_tdm->capture_dma_data);
786 if (i2s_tdm->has_playback)
787 snd_soc_dai_dma_data_set_playback(dai, &i2s_tdm->playback_dma_data);
788
789 return 0;
790 }
791
rockchip_dai_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int slot_width)792 static int rockchip_dai_tdm_slot(struct snd_soc_dai *dai,
793 unsigned int tx_mask, unsigned int rx_mask,
794 int slots, int slot_width)
795 {
796 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
797 unsigned int mask, val;
798
799 i2s_tdm->tdm_mode = true;
800 i2s_tdm->frame_width = slots * slot_width;
801 mask = TDM_SLOT_BIT_WIDTH_MSK | TDM_FRAME_WIDTH_MSK;
802 val = TDM_SLOT_BIT_WIDTH(slot_width) |
803 TDM_FRAME_WIDTH(slots * slot_width);
804 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_TXCR,
805 mask, val);
806 regmap_update_bits(i2s_tdm->regmap, I2S_TDM_RXCR,
807 mask, val);
808
809 return 0;
810 }
811
rockchip_i2s_tdm_set_bclk_ratio(struct snd_soc_dai * dai,unsigned int ratio)812 static int rockchip_i2s_tdm_set_bclk_ratio(struct snd_soc_dai *dai,
813 unsigned int ratio)
814 {
815 struct rk_i2s_tdm_dev *i2s_tdm = snd_soc_dai_get_drvdata(dai);
816
817 if (ratio < 32 || ratio > 512 || ratio % 2 == 1)
818 return -EINVAL;
819
820 i2s_tdm->frame_width = ratio;
821
822 return 0;
823 }
824
825 static const struct snd_soc_dai_ops rockchip_i2s_tdm_dai_ops = {
826 .probe = rockchip_i2s_tdm_dai_probe,
827 .hw_params = rockchip_i2s_tdm_hw_params,
828 .set_bclk_ratio = rockchip_i2s_tdm_set_bclk_ratio,
829 .set_fmt = rockchip_i2s_tdm_set_fmt,
830 .set_tdm_slot = rockchip_dai_tdm_slot,
831 .trigger = rockchip_i2s_tdm_trigger,
832 };
833
834 static const struct snd_soc_component_driver rockchip_i2s_tdm_component = {
835 .name = DRV_NAME,
836 .legacy_dai_naming = 1,
837 };
838
rockchip_i2s_tdm_wr_reg(struct device * dev,unsigned int reg)839 static bool rockchip_i2s_tdm_wr_reg(struct device *dev, unsigned int reg)
840 {
841 switch (reg) {
842 case I2S_TXCR:
843 case I2S_RXCR:
844 case I2S_CKR:
845 case I2S_DMACR:
846 case I2S_INTCR:
847 case I2S_XFER:
848 case I2S_CLR:
849 case I2S_TXDR:
850 case I2S_TDM_TXCR:
851 case I2S_TDM_RXCR:
852 case I2S_CLKDIV:
853 return true;
854 default:
855 return false;
856 }
857 }
858
rockchip_i2s_tdm_rd_reg(struct device * dev,unsigned int reg)859 static bool rockchip_i2s_tdm_rd_reg(struct device *dev, unsigned int reg)
860 {
861 switch (reg) {
862 case I2S_TXCR:
863 case I2S_RXCR:
864 case I2S_CKR:
865 case I2S_DMACR:
866 case I2S_INTCR:
867 case I2S_XFER:
868 case I2S_CLR:
869 case I2S_TXDR:
870 case I2S_RXDR:
871 case I2S_TXFIFOLR:
872 case I2S_INTSR:
873 case I2S_RXFIFOLR:
874 case I2S_TDM_TXCR:
875 case I2S_TDM_RXCR:
876 case I2S_CLKDIV:
877 return true;
878 default:
879 return false;
880 }
881 }
882
rockchip_i2s_tdm_volatile_reg(struct device * dev,unsigned int reg)883 static bool rockchip_i2s_tdm_volatile_reg(struct device *dev, unsigned int reg)
884 {
885 switch (reg) {
886 case I2S_TXFIFOLR:
887 case I2S_INTSR:
888 case I2S_CLR:
889 case I2S_TXDR:
890 case I2S_RXDR:
891 case I2S_RXFIFOLR:
892 return true;
893 default:
894 return false;
895 }
896 }
897
rockchip_i2s_tdm_precious_reg(struct device * dev,unsigned int reg)898 static bool rockchip_i2s_tdm_precious_reg(struct device *dev, unsigned int reg)
899 {
900 if (reg == I2S_RXDR)
901 return true;
902 return false;
903 }
904
905 static const struct reg_default rockchip_i2s_tdm_reg_defaults[] = {
906 {0x00, 0x7200000f},
907 {0x04, 0x01c8000f},
908 {0x08, 0x00001f1f},
909 {0x10, 0x001f0000},
910 {0x14, 0x01f00000},
911 {0x30, 0x00003eff},
912 {0x34, 0x00003eff},
913 {0x38, 0x00000707},
914 };
915
916 static const struct regmap_config rockchip_i2s_tdm_regmap_config = {
917 .reg_bits = 32,
918 .reg_stride = 4,
919 .val_bits = 32,
920 .max_register = I2S_CLKDIV,
921 .reg_defaults = rockchip_i2s_tdm_reg_defaults,
922 .num_reg_defaults = ARRAY_SIZE(rockchip_i2s_tdm_reg_defaults),
923 .writeable_reg = rockchip_i2s_tdm_wr_reg,
924 .readable_reg = rockchip_i2s_tdm_rd_reg,
925 .volatile_reg = rockchip_i2s_tdm_volatile_reg,
926 .precious_reg = rockchip_i2s_tdm_precious_reg,
927 .cache_type = REGCACHE_FLAT,
928 };
929
common_soc_init(struct device * dev,u32 addr)930 static int common_soc_init(struct device *dev, u32 addr)
931 {
932 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
933 const struct txrx_config *configs = i2s_tdm->soc_data->configs;
934 u32 reg = 0, val = 0, trcm = i2s_tdm->clk_trcm;
935 int i;
936
937 if (trcm == TRCM_TXRX)
938 return 0;
939
940 if (IS_ERR_OR_NULL(i2s_tdm->grf)) {
941 dev_err(i2s_tdm->dev,
942 "no grf present but non-txrx TRCM specified\n");
943 return -EINVAL;
944 }
945
946 for (i = 0; i < i2s_tdm->soc_data->config_count; i++) {
947 if (addr != configs[i].addr)
948 continue;
949 reg = configs[i].reg;
950 if (trcm == TRCM_TX)
951 val = configs[i].txonly;
952 else
953 val = configs[i].rxonly;
954
955 if (reg)
956 regmap_write(i2s_tdm->grf, reg, val);
957 }
958
959 return 0;
960 }
961
962 static const struct txrx_config px30_txrx_config[] = {
963 { 0xff060000, 0x184, PX30_I2S0_CLK_TXONLY, PX30_I2S0_CLK_RXONLY },
964 };
965
966 static const struct txrx_config rk1808_txrx_config[] = {
967 { 0xff7e0000, 0x190, RK1808_I2S0_CLK_TXONLY, RK1808_I2S0_CLK_RXONLY },
968 };
969
970 static const struct txrx_config rk3308_txrx_config[] = {
971 { 0xff300000, 0x308, RK3308_I2S0_CLK_TXONLY, RK3308_I2S0_CLK_RXONLY },
972 { 0xff310000, 0x308, RK3308_I2S1_CLK_TXONLY, RK3308_I2S1_CLK_RXONLY },
973 };
974
975 static const struct txrx_config rk3568_txrx_config[] = {
976 { 0xfe410000, 0x504, RK3568_I2S1_CLK_TXONLY, RK3568_I2S1_CLK_RXONLY },
977 { 0xfe410000, 0x508, RK3568_I2S1_MCLK_TX_OE, RK3568_I2S1_MCLK_RX_OE },
978 { 0xfe420000, 0x508, RK3568_I2S2_MCLK_OE, RK3568_I2S2_MCLK_OE },
979 { 0xfe430000, 0x504, RK3568_I2S3_CLK_TXONLY, RK3568_I2S3_CLK_RXONLY },
980 { 0xfe430000, 0x508, RK3568_I2S3_MCLK_TXONLY, RK3568_I2S3_MCLK_RXONLY },
981 { 0xfe430000, 0x508, RK3568_I2S3_MCLK_OE, RK3568_I2S3_MCLK_OE },
982 };
983
984 static const struct txrx_config rv1126_txrx_config[] = {
985 { 0xff800000, 0x10260, RV1126_I2S0_CLK_TXONLY, RV1126_I2S0_CLK_RXONLY },
986 };
987
988 static const struct rk_i2s_soc_data px30_i2s_soc_data = {
989 .softrst_offset = 0x0300,
990 .configs = px30_txrx_config,
991 .config_count = ARRAY_SIZE(px30_txrx_config),
992 .init = common_soc_init,
993 };
994
995 static const struct rk_i2s_soc_data rk1808_i2s_soc_data = {
996 .softrst_offset = 0x0300,
997 .configs = rk1808_txrx_config,
998 .config_count = ARRAY_SIZE(rk1808_txrx_config),
999 .init = common_soc_init,
1000 };
1001
1002 static const struct rk_i2s_soc_data rk3308_i2s_soc_data = {
1003 .softrst_offset = 0x0400,
1004 .grf_reg_offset = 0x0308,
1005 .grf_shift = 5,
1006 .configs = rk3308_txrx_config,
1007 .config_count = ARRAY_SIZE(rk3308_txrx_config),
1008 .init = common_soc_init,
1009 };
1010
1011 static const struct rk_i2s_soc_data rk3568_i2s_soc_data = {
1012 .softrst_offset = 0x0400,
1013 .configs = rk3568_txrx_config,
1014 .config_count = ARRAY_SIZE(rk3568_txrx_config),
1015 .init = common_soc_init,
1016 };
1017
1018 static const struct rk_i2s_soc_data rv1126_i2s_soc_data = {
1019 .softrst_offset = 0x0300,
1020 .configs = rv1126_txrx_config,
1021 .config_count = ARRAY_SIZE(rv1126_txrx_config),
1022 .init = common_soc_init,
1023 };
1024
1025 static const struct of_device_id rockchip_i2s_tdm_match[] = {
1026 { .compatible = "rockchip,px30-i2s-tdm", .data = &px30_i2s_soc_data },
1027 { .compatible = "rockchip,rk1808-i2s-tdm", .data = &rk1808_i2s_soc_data },
1028 { .compatible = "rockchip,rk3308-i2s-tdm", .data = &rk3308_i2s_soc_data },
1029 { .compatible = "rockchip,rk3568-i2s-tdm", .data = &rk3568_i2s_soc_data },
1030 { .compatible = "rockchip,rk3588-i2s-tdm" },
1031 { .compatible = "rockchip,rv1126-i2s-tdm", .data = &rv1126_i2s_soc_data },
1032 {},
1033 };
1034
1035 static const struct snd_soc_dai_driver i2s_tdm_dai = {
1036 .ops = &rockchip_i2s_tdm_dai_ops,
1037 };
1038
rockchip_i2s_tdm_init_dai(struct rk_i2s_tdm_dev * i2s_tdm)1039 static int rockchip_i2s_tdm_init_dai(struct rk_i2s_tdm_dev *i2s_tdm)
1040 {
1041 struct snd_soc_dai_driver *dai;
1042 struct property *dma_names;
1043 const char *dma_name;
1044 u64 formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
1045 SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
1046 SNDRV_PCM_FMTBIT_S32_LE);
1047 struct device_node *node = i2s_tdm->dev->of_node;
1048
1049 of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
1050 if (!strcmp(dma_name, "tx"))
1051 i2s_tdm->has_playback = true;
1052 if (!strcmp(dma_name, "rx"))
1053 i2s_tdm->has_capture = true;
1054 }
1055
1056 dai = devm_kmemdup(i2s_tdm->dev, &i2s_tdm_dai,
1057 sizeof(*dai), GFP_KERNEL);
1058 if (!dai)
1059 return -ENOMEM;
1060
1061 if (i2s_tdm->has_playback) {
1062 dai->playback.stream_name = "Playback";
1063 dai->playback.channels_min = 2;
1064 dai->playback.channels_max = 8;
1065 dai->playback.rates = SNDRV_PCM_RATE_8000_192000;
1066 dai->playback.formats = formats;
1067 }
1068
1069 if (i2s_tdm->has_capture) {
1070 dai->capture.stream_name = "Capture";
1071 dai->capture.channels_min = 2;
1072 dai->capture.channels_max = 8;
1073 dai->capture.rates = SNDRV_PCM_RATE_8000_192000;
1074 dai->capture.formats = formats;
1075 }
1076
1077 if (i2s_tdm->clk_trcm != TRCM_TXRX)
1078 dai->symmetric_rate = 1;
1079
1080 i2s_tdm->dai = dai;
1081
1082 return 0;
1083 }
1084
rockchip_i2s_tdm_path_check(struct rk_i2s_tdm_dev * i2s_tdm,int num,bool is_rx_path)1085 static int rockchip_i2s_tdm_path_check(struct rk_i2s_tdm_dev *i2s_tdm,
1086 int num,
1087 bool is_rx_path)
1088 {
1089 unsigned int *i2s_data;
1090 int i, j;
1091
1092 if (is_rx_path)
1093 i2s_data = i2s_tdm->i2s_sdis;
1094 else
1095 i2s_data = i2s_tdm->i2s_sdos;
1096
1097 for (i = 0; i < num; i++) {
1098 if (i2s_data[i] > CH_GRP_MAX - 1) {
1099 dev_err(i2s_tdm->dev,
1100 "%s path i2s_data[%d]: %d is too high, max is: %d\n",
1101 is_rx_path ? "RX" : "TX",
1102 i, i2s_data[i], CH_GRP_MAX);
1103 return -EINVAL;
1104 }
1105
1106 for (j = 0; j < num; j++) {
1107 if (i == j)
1108 continue;
1109
1110 if (i2s_data[i] == i2s_data[j]) {
1111 dev_err(i2s_tdm->dev,
1112 "%s path invalid routed i2s_data: [%d]%d == [%d]%d\n",
1113 is_rx_path ? "RX" : "TX",
1114 i, i2s_data[i],
1115 j, i2s_data[j]);
1116 return -EINVAL;
1117 }
1118 }
1119 }
1120
1121 return 0;
1122 }
1123
rockchip_i2s_tdm_tx_path_config(struct rk_i2s_tdm_dev * i2s_tdm,int num)1124 static void rockchip_i2s_tdm_tx_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
1125 int num)
1126 {
1127 int idx;
1128
1129 for (idx = 0; idx < num; idx++) {
1130 regmap_update_bits(i2s_tdm->regmap, I2S_TXCR,
1131 I2S_TXCR_PATH_MASK(idx),
1132 I2S_TXCR_PATH(idx, i2s_tdm->i2s_sdos[idx]));
1133 }
1134 }
1135
rockchip_i2s_tdm_rx_path_config(struct rk_i2s_tdm_dev * i2s_tdm,int num)1136 static void rockchip_i2s_tdm_rx_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
1137 int num)
1138 {
1139 int idx;
1140
1141 for (idx = 0; idx < num; idx++) {
1142 regmap_update_bits(i2s_tdm->regmap, I2S_RXCR,
1143 I2S_RXCR_PATH_MASK(idx),
1144 I2S_RXCR_PATH(idx, i2s_tdm->i2s_sdis[idx]));
1145 }
1146 }
1147
rockchip_i2s_tdm_path_config(struct rk_i2s_tdm_dev * i2s_tdm,int num,bool is_rx_path)1148 static void rockchip_i2s_tdm_path_config(struct rk_i2s_tdm_dev *i2s_tdm,
1149 int num, bool is_rx_path)
1150 {
1151 if (is_rx_path)
1152 rockchip_i2s_tdm_rx_path_config(i2s_tdm, num);
1153 else
1154 rockchip_i2s_tdm_tx_path_config(i2s_tdm, num);
1155 }
1156
rockchip_i2s_tdm_path_prepare(struct rk_i2s_tdm_dev * i2s_tdm,struct device_node * np,bool is_rx_path)1157 static int rockchip_i2s_tdm_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
1158 struct device_node *np,
1159 bool is_rx_path)
1160 {
1161 char *i2s_tx_path_prop = "rockchip,i2s-tx-route";
1162 char *i2s_rx_path_prop = "rockchip,i2s-rx-route";
1163 char *i2s_path_prop;
1164 unsigned int *i2s_data;
1165 int num, ret = 0;
1166
1167 if (is_rx_path) {
1168 i2s_path_prop = i2s_rx_path_prop;
1169 i2s_data = i2s_tdm->i2s_sdis;
1170 } else {
1171 i2s_path_prop = i2s_tx_path_prop;
1172 i2s_data = i2s_tdm->i2s_sdos;
1173 }
1174
1175 num = of_count_phandle_with_args(np, i2s_path_prop, NULL);
1176 if (num < 0) {
1177 if (num != -ENOENT) {
1178 dev_err(i2s_tdm->dev,
1179 "Failed to read '%s' num: %d\n",
1180 i2s_path_prop, num);
1181 ret = num;
1182 }
1183 return ret;
1184 } else if (num != CH_GRP_MAX) {
1185 dev_err(i2s_tdm->dev,
1186 "The num: %d should be: %d\n", num, CH_GRP_MAX);
1187 return -EINVAL;
1188 }
1189
1190 ret = of_property_read_u32_array(np, i2s_path_prop,
1191 i2s_data, num);
1192 if (ret < 0) {
1193 dev_err(i2s_tdm->dev,
1194 "Failed to read '%s': %d\n",
1195 i2s_path_prop, ret);
1196 return ret;
1197 }
1198
1199 ret = rockchip_i2s_tdm_path_check(i2s_tdm, num, is_rx_path);
1200 if (ret < 0) {
1201 dev_err(i2s_tdm->dev,
1202 "Failed to check i2s data bus: %d\n", ret);
1203 return ret;
1204 }
1205
1206 rockchip_i2s_tdm_path_config(i2s_tdm, num, is_rx_path);
1207
1208 return 0;
1209 }
1210
rockchip_i2s_tdm_tx_path_prepare(struct rk_i2s_tdm_dev * i2s_tdm,struct device_node * np)1211 static int rockchip_i2s_tdm_tx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
1212 struct device_node *np)
1213 {
1214 return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 0);
1215 }
1216
rockchip_i2s_tdm_rx_path_prepare(struct rk_i2s_tdm_dev * i2s_tdm,struct device_node * np)1217 static int rockchip_i2s_tdm_rx_path_prepare(struct rk_i2s_tdm_dev *i2s_tdm,
1218 struct device_node *np)
1219 {
1220 return rockchip_i2s_tdm_path_prepare(i2s_tdm, np, 1);
1221 }
1222
rockchip_i2s_tdm_probe(struct platform_device * pdev)1223 static int rockchip_i2s_tdm_probe(struct platform_device *pdev)
1224 {
1225 struct device_node *node = pdev->dev.of_node;
1226 struct rk_i2s_tdm_dev *i2s_tdm;
1227 struct resource *res;
1228 void __iomem *regs;
1229 int ret;
1230
1231 i2s_tdm = devm_kzalloc(&pdev->dev, sizeof(*i2s_tdm), GFP_KERNEL);
1232 if (!i2s_tdm)
1233 return -ENOMEM;
1234
1235 i2s_tdm->dev = &pdev->dev;
1236
1237 spin_lock_init(&i2s_tdm->lock);
1238 i2s_tdm->soc_data = device_get_match_data(&pdev->dev);
1239 i2s_tdm->frame_width = 64;
1240
1241 i2s_tdm->clk_trcm = TRCM_TXRX;
1242 if (of_property_read_bool(node, "rockchip,trcm-sync-tx-only"))
1243 i2s_tdm->clk_trcm = TRCM_TX;
1244 if (of_property_read_bool(node, "rockchip,trcm-sync-rx-only")) {
1245 if (i2s_tdm->clk_trcm) {
1246 dev_err(i2s_tdm->dev, "invalid trcm-sync configuration\n");
1247 return -EINVAL;
1248 }
1249 i2s_tdm->clk_trcm = TRCM_RX;
1250 }
1251
1252 ret = rockchip_i2s_tdm_init_dai(i2s_tdm);
1253 if (ret)
1254 return ret;
1255
1256 i2s_tdm->grf = syscon_regmap_lookup_by_phandle(node, "rockchip,grf");
1257 i2s_tdm->tx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
1258 "tx-m");
1259 if (IS_ERR(i2s_tdm->tx_reset)) {
1260 ret = PTR_ERR(i2s_tdm->tx_reset);
1261 return dev_err_probe(i2s_tdm->dev, ret,
1262 "Error in tx-m reset control\n");
1263 }
1264
1265 i2s_tdm->rx_reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
1266 "rx-m");
1267 if (IS_ERR(i2s_tdm->rx_reset)) {
1268 ret = PTR_ERR(i2s_tdm->rx_reset);
1269 return dev_err_probe(i2s_tdm->dev, ret,
1270 "Error in rx-m reset control\n");
1271 }
1272
1273 i2s_tdm->hclk = devm_clk_get(&pdev->dev, "hclk");
1274 if (IS_ERR(i2s_tdm->hclk)) {
1275 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->hclk),
1276 "Failed to get clock hclk\n");
1277 }
1278
1279 i2s_tdm->mclk_tx = devm_clk_get(&pdev->dev, "mclk_tx");
1280 if (IS_ERR(i2s_tdm->mclk_tx)) {
1281 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_tx),
1282 "Failed to get clock mclk_tx\n");
1283 }
1284
1285 i2s_tdm->mclk_rx = devm_clk_get(&pdev->dev, "mclk_rx");
1286 if (IS_ERR(i2s_tdm->mclk_rx)) {
1287 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->mclk_rx),
1288 "Failed to get clock mclk_rx\n");
1289 }
1290
1291 i2s_tdm->io_multiplex =
1292 of_property_read_bool(node, "rockchip,io-multiplex");
1293
1294 regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1295 if (IS_ERR(regs)) {
1296 return dev_err_probe(i2s_tdm->dev, PTR_ERR(regs),
1297 "Failed to get resource IORESOURCE_MEM\n");
1298 }
1299
1300 i2s_tdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
1301 &rockchip_i2s_tdm_regmap_config);
1302 if (IS_ERR(i2s_tdm->regmap)) {
1303 return dev_err_probe(i2s_tdm->dev, PTR_ERR(i2s_tdm->regmap),
1304 "Failed to initialise regmap\n");
1305 }
1306
1307 if (i2s_tdm->has_playback) {
1308 i2s_tdm->playback_dma_data.addr = res->start + I2S_TXDR;
1309 i2s_tdm->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1310 i2s_tdm->playback_dma_data.maxburst = 8;
1311 }
1312
1313 if (i2s_tdm->has_capture) {
1314 i2s_tdm->capture_dma_data.addr = res->start + I2S_RXDR;
1315 i2s_tdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1316 i2s_tdm->capture_dma_data.maxburst = 8;
1317 }
1318
1319 ret = rockchip_i2s_tdm_tx_path_prepare(i2s_tdm, node);
1320 if (ret < 0) {
1321 dev_err(&pdev->dev, "I2S TX path prepare failed: %d\n", ret);
1322 return ret;
1323 }
1324
1325 ret = rockchip_i2s_tdm_rx_path_prepare(i2s_tdm, node);
1326 if (ret < 0) {
1327 dev_err(&pdev->dev, "I2S RX path prepare failed: %d\n", ret);
1328 return ret;
1329 }
1330
1331 dev_set_drvdata(&pdev->dev, i2s_tdm);
1332
1333 ret = clk_prepare_enable(i2s_tdm->hclk);
1334 if (ret) {
1335 return dev_err_probe(i2s_tdm->dev, ret,
1336 "Failed to enable clock hclk\n");
1337 }
1338
1339 ret = i2s_tdm_prepare_enable_mclk(i2s_tdm);
1340 if (ret) {
1341 ret = dev_err_probe(i2s_tdm->dev, ret,
1342 "Failed to enable one or more mclks\n");
1343 goto err_disable_hclk;
1344 }
1345
1346 pm_runtime_enable(&pdev->dev);
1347
1348 regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
1349 I2S_DMACR_TDL(16));
1350 regmap_update_bits(i2s_tdm->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
1351 I2S_DMACR_RDL(16));
1352 regmap_update_bits(i2s_tdm->regmap, I2S_CKR, I2S_CKR_TRCM_MASK,
1353 i2s_tdm->clk_trcm << I2S_CKR_TRCM_SHIFT);
1354
1355 if (i2s_tdm->soc_data && i2s_tdm->soc_data->init)
1356 i2s_tdm->soc_data->init(&pdev->dev, res->start);
1357
1358 ret = devm_snd_soc_register_component(&pdev->dev,
1359 &rockchip_i2s_tdm_component,
1360 i2s_tdm->dai, 1);
1361
1362 if (ret) {
1363 dev_err(&pdev->dev, "Could not register DAI\n");
1364 goto err_suspend;
1365 }
1366
1367 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1368 if (ret) {
1369 dev_err(&pdev->dev, "Could not register PCM\n");
1370 goto err_suspend;
1371 }
1372
1373 return 0;
1374
1375 err_suspend:
1376 if (!pm_runtime_status_suspended(&pdev->dev))
1377 i2s_tdm_runtime_suspend(&pdev->dev);
1378 pm_runtime_disable(&pdev->dev);
1379
1380 err_disable_hclk:
1381 clk_disable_unprepare(i2s_tdm->hclk);
1382
1383 return ret;
1384 }
1385
rockchip_i2s_tdm_remove(struct platform_device * pdev)1386 static void rockchip_i2s_tdm_remove(struct platform_device *pdev)
1387 {
1388 if (!pm_runtime_status_suspended(&pdev->dev))
1389 i2s_tdm_runtime_suspend(&pdev->dev);
1390
1391 pm_runtime_disable(&pdev->dev);
1392 }
1393
rockchip_i2s_tdm_suspend(struct device * dev)1394 static int __maybe_unused rockchip_i2s_tdm_suspend(struct device *dev)
1395 {
1396 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
1397
1398 regcache_mark_dirty(i2s_tdm->regmap);
1399
1400 return 0;
1401 }
1402
rockchip_i2s_tdm_resume(struct device * dev)1403 static int __maybe_unused rockchip_i2s_tdm_resume(struct device *dev)
1404 {
1405 struct rk_i2s_tdm_dev *i2s_tdm = dev_get_drvdata(dev);
1406 int ret;
1407
1408 ret = pm_runtime_resume_and_get(dev);
1409 if (ret < 0)
1410 return ret;
1411 ret = regcache_sync(i2s_tdm->regmap);
1412 pm_runtime_put(dev);
1413
1414 return ret;
1415 }
1416
1417 static const struct dev_pm_ops rockchip_i2s_tdm_pm_ops = {
1418 SET_RUNTIME_PM_OPS(i2s_tdm_runtime_suspend, i2s_tdm_runtime_resume,
1419 NULL)
1420 SET_SYSTEM_SLEEP_PM_OPS(rockchip_i2s_tdm_suspend,
1421 rockchip_i2s_tdm_resume)
1422 };
1423
1424 static struct platform_driver rockchip_i2s_tdm_driver = {
1425 .probe = rockchip_i2s_tdm_probe,
1426 .remove = rockchip_i2s_tdm_remove,
1427 .driver = {
1428 .name = DRV_NAME,
1429 .of_match_table = rockchip_i2s_tdm_match,
1430 .pm = &rockchip_i2s_tdm_pm_ops,
1431 },
1432 };
1433 module_platform_driver(rockchip_i2s_tdm_driver);
1434
1435 MODULE_DESCRIPTION("ROCKCHIP I2S/TDM ASoC Interface");
1436 MODULE_AUTHOR("Sugar Zhang <sugar.zhang@rock-chips.com>");
1437 MODULE_LICENSE("GPL v2");
1438 MODULE_ALIAS("platform:" DRV_NAME);
1439 MODULE_DEVICE_TABLE(of, rockchip_i2s_tdm_match);
1440