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");
164 static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
167 struct rk_i2s_dev *i2s = to_info(cpu_dai);
168 unsigned int mask = 0, val = 0;
170 mask = I2S_CKR_MSS_MASK;
171 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
172 case SND_SOC_DAIFMT_CBS_CFS:
173 /* Set source clock in Master mode */
174 val = I2S_CKR_MSS_MASTER;
176 case SND_SOC_DAIFMT_CBM_CFM:
177 val = I2S_CKR_MSS_SLAVE;
183 regmap_update_bits(i2s->regmap, I2S_CKR, mask, val);
185 mask = I2S_TXCR_IBM_MASK;
186 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
187 case SND_SOC_DAIFMT_RIGHT_J:
188 val = I2S_TXCR_IBM_RSJM;
190 case SND_SOC_DAIFMT_LEFT_J:
191 val = I2S_TXCR_IBM_LSJM;
193 case SND_SOC_DAIFMT_I2S:
194 val = I2S_TXCR_IBM_NORMAL;
200 regmap_update_bits(i2s->regmap, I2S_TXCR, mask, val);
202 mask = I2S_RXCR_IBM_MASK;
203 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
204 case SND_SOC_DAIFMT_RIGHT_J:
205 val = I2S_RXCR_IBM_RSJM;
207 case SND_SOC_DAIFMT_LEFT_J:
208 val = I2S_RXCR_IBM_LSJM;
210 case SND_SOC_DAIFMT_I2S:
211 val = I2S_RXCR_IBM_NORMAL;
217 regmap_update_bits(i2s->regmap, I2S_RXCR, mask, val);
222 static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
223 struct snd_pcm_hw_params *params,
224 struct snd_soc_dai *dai)
226 struct rk_i2s_dev *i2s = to_info(dai);
227 unsigned int val = 0;
229 switch (params_format(params)) {
230 case SNDRV_PCM_FORMAT_S8:
231 val |= I2S_TXCR_VDW(8);
233 case SNDRV_PCM_FORMAT_S16_LE:
234 val |= I2S_TXCR_VDW(16);
236 case SNDRV_PCM_FORMAT_S20_3LE:
237 val |= I2S_TXCR_VDW(20);
239 case SNDRV_PCM_FORMAT_S24_LE:
240 val |= I2S_TXCR_VDW(24);
246 regmap_update_bits(i2s->regmap, I2S_TXCR, I2S_TXCR_VDW_MASK, val);
247 regmap_update_bits(i2s->regmap, I2S_RXCR, I2S_RXCR_VDW_MASK, val);
252 static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
253 int cmd, struct snd_soc_dai *dai)
255 struct rk_i2s_dev *i2s = to_info(dai);
259 case SNDRV_PCM_TRIGGER_START:
260 case SNDRV_PCM_TRIGGER_RESUME:
261 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
262 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
263 rockchip_snd_rxctrl(i2s, 1);
265 rockchip_snd_txctrl(i2s, 1);
267 case SNDRV_PCM_TRIGGER_SUSPEND:
268 case SNDRV_PCM_TRIGGER_STOP:
269 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
270 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
271 rockchip_snd_rxctrl(i2s, 0);
273 rockchip_snd_txctrl(i2s, 0);
283 static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
284 unsigned int freq, int dir)
286 struct rk_i2s_dev *i2s = to_info(cpu_dai);
289 ret = clk_set_rate(i2s->mclk, freq);
291 dev_err(i2s->dev, "Fail to set mclk %d\n", ret);
296 static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
298 struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai);
300 dai->capture_dma_data = &i2s->capture_dma_data;
301 dai->playback_dma_data = &i2s->playback_dma_data;
306 static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
307 .hw_params = rockchip_i2s_hw_params,
308 .set_sysclk = rockchip_i2s_set_sysclk,
309 .set_fmt = rockchip_i2s_set_fmt,
310 .trigger = rockchip_i2s_trigger,
313 static struct snd_soc_dai_driver rockchip_i2s_dai = {
314 .probe = rockchip_i2s_dai_probe,
316 .stream_name = "Playback",
319 .rates = SNDRV_PCM_RATE_8000_192000,
320 .formats = (SNDRV_PCM_FMTBIT_S8 |
321 SNDRV_PCM_FMTBIT_S16_LE |
322 SNDRV_PCM_FMTBIT_S20_3LE |
323 SNDRV_PCM_FMTBIT_S24_LE),
326 .stream_name = "Capture",
329 .rates = SNDRV_PCM_RATE_8000_192000,
330 .formats = (SNDRV_PCM_FMTBIT_S8 |
331 SNDRV_PCM_FMTBIT_S16_LE |
332 SNDRV_PCM_FMTBIT_S20_3LE |
333 SNDRV_PCM_FMTBIT_S24_LE),
335 .ops = &rockchip_i2s_dai_ops,
338 static const struct snd_soc_component_driver rockchip_i2s_component = {
342 static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg)
359 static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg)
378 static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg)
389 static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg)
397 static const struct regmap_config rockchip_i2s_regmap_config = {
401 .max_register = I2S_RXDR,
402 .writeable_reg = rockchip_i2s_wr_reg,
403 .readable_reg = rockchip_i2s_rd_reg,
404 .volatile_reg = rockchip_i2s_volatile_reg,
405 .precious_reg = rockchip_i2s_precious_reg,
406 .cache_type = REGCACHE_FLAT,
409 static int rockchip_i2s_probe(struct platform_device *pdev)
411 struct rk_i2s_dev *i2s;
412 struct resource *res;
416 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
418 dev_err(&pdev->dev, "Can't allocate rk_i2s_dev\n");
422 /* try to prepare related clocks */
423 i2s->hclk = devm_clk_get(&pdev->dev, "i2s_hclk");
424 if (IS_ERR(i2s->hclk)) {
425 dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n");
426 return PTR_ERR(i2s->hclk);
428 ret = clk_prepare_enable(i2s->hclk);
430 dev_err(i2s->dev, "hclock enable failed %d\n", ret);
434 i2s->mclk = devm_clk_get(&pdev->dev, "i2s_clk");
435 if (IS_ERR(i2s->mclk)) {
436 dev_err(&pdev->dev, "Can't retrieve i2s master clock\n");
437 return PTR_ERR(i2s->mclk);
440 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
441 regs = devm_ioremap_resource(&pdev->dev, res);
443 return PTR_ERR(regs);
445 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
446 &rockchip_i2s_regmap_config);
447 if (IS_ERR(i2s->regmap)) {
449 "Failed to initialise managed register map\n");
450 return PTR_ERR(i2s->regmap);
453 i2s->playback_dma_data.addr = res->start + I2S_TXDR;
454 i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
455 i2s->playback_dma_data.maxburst = 16;
457 i2s->capture_dma_data.addr = res->start + I2S_RXDR;
458 i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
459 i2s->capture_dma_data.maxburst = 16;
461 i2s->dev = &pdev->dev;
462 dev_set_drvdata(&pdev->dev, i2s);
464 pm_runtime_enable(&pdev->dev);
465 if (!pm_runtime_enabled(&pdev->dev)) {
466 ret = i2s_runtime_resume(&pdev->dev);
471 ret = devm_snd_soc_register_component(&pdev->dev,
472 &rockchip_i2s_component,
473 &rockchip_i2s_dai, 1);
475 dev_err(&pdev->dev, "Could not register DAI\n");
479 ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
481 dev_err(&pdev->dev, "Could not register PCM\n");
482 goto err_pcm_register;
488 snd_dmaengine_pcm_unregister(&pdev->dev);
490 if (!pm_runtime_status_suspended(&pdev->dev))
491 i2s_runtime_suspend(&pdev->dev);
493 pm_runtime_disable(&pdev->dev);
498 static int rockchip_i2s_remove(struct platform_device *pdev)
500 struct rk_i2s_dev *i2s = dev_get_drvdata(&pdev->dev);
502 pm_runtime_disable(&pdev->dev);
503 if (!pm_runtime_status_suspended(&pdev->dev))
504 i2s_runtime_suspend(&pdev->dev);
506 clk_disable_unprepare(i2s->mclk);
507 clk_disable_unprepare(i2s->hclk);
508 snd_dmaengine_pcm_unregister(&pdev->dev);
509 snd_soc_unregister_component(&pdev->dev);
514 static const struct of_device_id rockchip_i2s_match[] = {
515 { .compatible = "rockchip,rk3066-i2s", },
519 static const struct dev_pm_ops rockchip_i2s_pm_ops = {
520 SET_RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume,
524 static struct platform_driver rockchip_i2s_driver = {
525 .probe = rockchip_i2s_probe,
526 .remove = rockchip_i2s_remove,
529 .owner = THIS_MODULE,
530 .of_match_table = of_match_ptr(rockchip_i2s_match),
531 .pm = &rockchip_i2s_pm_ops,
534 module_platform_driver(rockchip_i2s_driver);
536 MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
537 MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>");
538 MODULE_LICENSE("GPL v2");
539 MODULE_ALIAS("platform:" DRV_NAME);
540 MODULE_DEVICE_TABLE(of, rockchip_i2s_match);