1 /* sound/soc/rockchip/rockchip_i2s.c
3 * ALSA SoC Audio Layer - Rockchip I2S Controller driver
5 * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
6 * Author: Jianqun <jay.xu@rock-chips.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/delay.h>
15 #include <linux/of_gpio.h>
16 #include <linux/clk.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/regmap.h>
19 #include <sound/pcm_params.h>
20 #include <sound/dmaengine_pcm.h>
22 #include "rockchip_i2s.h"
24 #define DRV_NAME "rockchip-i2s"
32 struct snd_dmaengine_dai_dma_data capture_dma_data;
33 struct snd_dmaengine_dai_dma_data playback_dma_data;
35 struct regmap *regmap;
38 * Used to indicate the tx/rx status.
39 * I2S controller hopes to start the tx and rx together,
40 * also to stop them when they are both try to stop.
46 static int i2s_runtime_suspend(struct device *dev)
48 struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
50 clk_disable_unprepare(i2s->mclk);
55 static int i2s_runtime_resume(struct device *dev)
57 struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
60 ret = clk_prepare_enable(i2s->mclk);
62 dev_err(i2s->dev, "clock enable failed %d\n", ret);
69 static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
71 return snd_soc_dai_get_drvdata(dai);
74 static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
80 regmap_update_bits(i2s->regmap, I2S_DMACR,
81 I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE);
83 regmap_update_bits(i2s->regmap, I2S_XFER,
84 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
85 I2S_XFER_TXS_START | I2S_XFER_RXS_START);
89 i2s->tx_start = false;
91 regmap_update_bits(i2s->regmap, I2S_DMACR,
92 I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE);
95 regmap_update_bits(i2s->regmap, I2S_XFER,
101 regmap_update_bits(i2s->regmap, I2S_CLR,
102 I2S_CLR_TXC | I2S_CLR_RXC,
103 I2S_CLR_TXC | I2S_CLR_RXC);
105 regmap_read(i2s->regmap, I2S_CLR, &val);
107 /* Should wait for clear operation to finish */
109 regmap_read(i2s->regmap, I2S_CLR, &val);
112 dev_warn(i2s->dev, "fail to clear\n");
120 static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
122 unsigned int val = 0;
126 regmap_update_bits(i2s->regmap, I2S_DMACR,
127 I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE);
129 regmap_update_bits(i2s->regmap, I2S_XFER,
130 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
131 I2S_XFER_TXS_START | I2S_XFER_RXS_START);
133 i2s->rx_start = true;
135 i2s->rx_start = false;
137 regmap_update_bits(i2s->regmap, I2S_DMACR,
138 I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE);
140 if (!i2s->tx_start) {
141 regmap_update_bits(i2s->regmap, I2S_XFER,
147 regmap_update_bits(i2s->regmap, I2S_CLR,
148 I2S_CLR_TXC | I2S_CLR_RXC,
149 I2S_CLR_TXC | I2S_CLR_RXC);
151 regmap_read(i2s->regmap, I2S_CLR, &val);
153 /* Should wait for clear operation to finish */
155 regmap_read(i2s->regmap, I2S_CLR, &val);
158 dev_warn(i2s->dev, "fail to clear\n");
166 static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
169 struct rk_i2s_dev *i2s = to_info(cpu_dai);
170 unsigned int mask = 0, val = 0;
172 mask = I2S_CKR_MSS_MASK;
173 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
174 case SND_SOC_DAIFMT_CBS_CFS:
175 /* Set source clock in Master mode */
176 val = I2S_CKR_MSS_MASTER;
178 case SND_SOC_DAIFMT_CBM_CFM:
179 val = I2S_CKR_MSS_SLAVE;
185 regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
187 mask = I2S_TXCR_IBM_MASK;
188 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
189 case SND_SOC_DAIFMT_RIGHT_J:
190 val = I2S_TXCR_IBM_RSJM;
192 case SND_SOC_DAIFMT_LEFT_J:
193 val = I2S_TXCR_IBM_LSJM;
195 case SND_SOC_DAIFMT_I2S:
196 val = I2S_TXCR_IBM_NORMAL;
202 regmap_update_bits(i2s->regmap, I2S_TXCR, mask, val);
204 mask = I2S_RXCR_IBM_MASK;
205 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
206 case SND_SOC_DAIFMT_RIGHT_J:
207 val = I2S_RXCR_IBM_RSJM;
209 case SND_SOC_DAIFMT_LEFT_J:
210 val = I2S_RXCR_IBM_LSJM;
212 case SND_SOC_DAIFMT_I2S:
213 val = I2S_RXCR_IBM_NORMAL;
219 regmap_update_bits(i2s->regmap, I2S_RXCR, mask, val);
224 static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
225 struct snd_pcm_hw_params *params,
226 struct snd_soc_dai *dai)
228 struct rk_i2s_dev *i2s = to_info(dai);
229 unsigned int val = 0;
231 switch (params_format(params)) {
232 case SNDRV_PCM_FORMAT_S8:
233 val |= I2S_TXCR_VDW(8);
235 case SNDRV_PCM_FORMAT_S16_LE:
236 val |= I2S_TXCR_VDW(16);
238 case SNDRV_PCM_FORMAT_S20_3LE:
239 val |= I2S_TXCR_VDW(20);
241 case SNDRV_PCM_FORMAT_S24_LE:
242 val |= I2S_TXCR_VDW(24);
248 regmap_update_bits(i2s->regmap, I2S_TXCR, I2S_TXCR_VDW_MASK, val);
249 regmap_update_bits(i2s->regmap, I2S_RXCR, I2S_RXCR_VDW_MASK, val);
250 regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
252 regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
258 static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
259 int cmd, struct snd_soc_dai *dai)
261 struct rk_i2s_dev *i2s = to_info(dai);
265 case SNDRV_PCM_TRIGGER_START:
266 case SNDRV_PCM_TRIGGER_RESUME:
267 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
268 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
269 rockchip_snd_rxctrl(i2s, 1);
271 rockchip_snd_txctrl(i2s, 1);
273 case SNDRV_PCM_TRIGGER_SUSPEND:
274 case SNDRV_PCM_TRIGGER_STOP:
275 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
276 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
277 rockchip_snd_rxctrl(i2s, 0);
279 rockchip_snd_txctrl(i2s, 0);
289 static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
290 unsigned int freq, int dir)
292 struct rk_i2s_dev *i2s = to_info(cpu_dai);
295 ret = clk_set_rate(i2s->mclk, freq);
297 dev_err(i2s->dev, "Fail to set mclk %d\n", ret);
302 static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
304 struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai);
306 dai->capture_dma_data = &i2s->capture_dma_data;
307 dai->playback_dma_data = &i2s->playback_dma_data;
312 static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
313 .hw_params = rockchip_i2s_hw_params,
314 .set_sysclk = rockchip_i2s_set_sysclk,
315 .set_fmt = rockchip_i2s_set_fmt,
316 .trigger = rockchip_i2s_trigger,
319 static struct snd_soc_dai_driver rockchip_i2s_dai = {
320 .probe = rockchip_i2s_dai_probe,
322 .stream_name = "Playback",
325 .rates = SNDRV_PCM_RATE_8000_192000,
326 .formats = (SNDRV_PCM_FMTBIT_S8 |
327 SNDRV_PCM_FMTBIT_S16_LE |
328 SNDRV_PCM_FMTBIT_S20_3LE |
329 SNDRV_PCM_FMTBIT_S24_LE),
332 .stream_name = "Capture",
335 .rates = SNDRV_PCM_RATE_8000_192000,
336 .formats = (SNDRV_PCM_FMTBIT_S8 |
337 SNDRV_PCM_FMTBIT_S16_LE |
338 SNDRV_PCM_FMTBIT_S20_3LE |
339 SNDRV_PCM_FMTBIT_S24_LE),
341 .ops = &rockchip_i2s_dai_ops,
342 .symmetric_rates = 1,
345 static const struct snd_soc_component_driver rockchip_i2s_component = {
349 static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg)
366 static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg)
385 static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg)
396 static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg)
404 static const struct regmap_config rockchip_i2s_regmap_config = {
408 .max_register = I2S_RXDR,
409 .writeable_reg = rockchip_i2s_wr_reg,
410 .readable_reg = rockchip_i2s_rd_reg,
411 .volatile_reg = rockchip_i2s_volatile_reg,
412 .precious_reg = rockchip_i2s_precious_reg,
413 .cache_type = REGCACHE_FLAT,
416 static int rockchip_i2s_probe(struct platform_device *pdev)
418 struct rk_i2s_dev *i2s;
419 struct resource *res;
423 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
425 dev_err(&pdev->dev, "Can't allocate rk_i2s_dev\n");
429 /* try to prepare related clocks */
430 i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk");
431 if (IS_ERR(i2s->hclk)) {
432 dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n");
433 return PTR_ERR(i2s->hclk);
435 ret = clk_prepare_enable(i2s->hclk);
437 dev_err(i2s->dev, "hclock enable failed %d\n", ret);
441 i2s->mclk = devm_clk_get(&pdev->dev, "i2s_clk");
442 if (IS_ERR(i2s->mclk)) {
443 dev_err(&pdev->dev, "Can't retrieve i2s master clock\n");
444 return PTR_ERR(i2s->mclk);
447 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
448 regs = devm_ioremap_resource(&pdev->dev, res);
450 return PTR_ERR(regs);
452 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
453 &rockchip_i2s_regmap_config);
454 if (IS_ERR(i2s->regmap)) {
456 "Failed to initialise managed register map\n");
457 return PTR_ERR(i2s->regmap);
460 i2s->playback_dma_data.addr = res->start + I2S_TXDR;
461 i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
462 i2s->playback_dma_data.maxburst = 4;
464 i2s->capture_dma_data.addr = res->start + I2S_RXDR;
465 i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
466 i2s->capture_dma_data.maxburst = 4;
468 i2s->dev = &pdev->dev;
469 dev_set_drvdata(&pdev->dev, i2s);
471 pm_runtime_enable(&pdev->dev);
472 if (!pm_runtime_enabled(&pdev->dev)) {
473 ret = i2s_runtime_resume(&pdev->dev);
478 ret = devm_snd_soc_register_component(&pdev->dev,
479 &rockchip_i2s_component,
480 &rockchip_i2s_dai, 1);
482 dev_err(&pdev->dev, "Could not register DAI\n");
486 ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
488 dev_err(&pdev->dev, "Could not register PCM\n");
489 goto err_pcm_register;
495 snd_dmaengine_pcm_unregister(&pdev->dev);
497 if (!pm_runtime_status_suspended(&pdev->dev))
498 i2s_runtime_suspend(&pdev->dev);
500 pm_runtime_disable(&pdev->dev);
505 static int rockchip_i2s_remove(struct platform_device *pdev)
507 struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev);
509 pm_runtime_disable(&pdev->dev);
510 if (!pm_runtime_status_suspended(&pdev->dev))
511 i2s_runtime_suspend(&pdev->dev);
513 clk_disable_unprepare(i2s->mclk);
514 clk_disable_unprepare(i2s->hclk);
515 snd_dmaengine_pcm_unregister(&pdev->dev);
516 snd_soc_unregister_component(&pdev->dev);
521 static const struct of_device_id rockchip_i2s_match[] = {
522 { .compatible = "rockchip,rk3066-i2s", },
526 static const struct dev_pm_ops rockchip_i2s_pm_ops = {
527 SET_RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume,
531 static struct platform_driver rockchip_i2s_driver = {
532 .probe = rockchip_i2s_probe,
533 .remove = rockchip_i2s_remove,
536 .of_match_table = of_match_ptr(rockchip_i2s_match),
537 .pm = &rockchip_i2s_pm_ops,
540 module_platform_driver(rockchip_i2s_driver);
542 MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
543 MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>");
544 MODULE_LICENSE("GPL v2");
545 MODULE_ALIAS("platform:" DRV_NAME);
546 MODULE_DEVICE_TABLE(of, rockchip_i2s_match);