1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * SiRF USP in I2S/DSP mode
5 * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
7 #include <linux/module.h>
10 #include <linux/clk.h>
11 #include <linux/pm_runtime.h>
12 #include <sound/soc.h>
13 #include <sound/pcm_params.h>
14 #include <sound/dmaengine_pcm.h>
19 struct regmap *regmap;
24 struct snd_dmaengine_dai_dma_data playback_dma_data;
25 struct snd_dmaengine_dai_dma_data capture_dma_data;
28 static void sirf_usp_tx_enable(struct sirf_usp *usp)
30 regmap_update_bits(usp->regmap, USP_TX_FIFO_OP,
31 USP_TX_FIFO_RESET, USP_TX_FIFO_RESET);
32 regmap_write(usp->regmap, USP_TX_FIFO_OP, 0);
34 regmap_update_bits(usp->regmap, USP_TX_FIFO_OP,
35 USP_TX_FIFO_START, USP_TX_FIFO_START);
37 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
38 USP_TX_ENA, USP_TX_ENA);
41 static void sirf_usp_tx_disable(struct sirf_usp *usp)
43 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
44 USP_TX_ENA, ~USP_TX_ENA);
46 regmap_write(usp->regmap, USP_TX_FIFO_OP, 0);
49 static void sirf_usp_rx_enable(struct sirf_usp *usp)
51 regmap_update_bits(usp->regmap, USP_RX_FIFO_OP,
52 USP_RX_FIFO_RESET, USP_RX_FIFO_RESET);
53 regmap_write(usp->regmap, USP_RX_FIFO_OP, 0);
55 regmap_update_bits(usp->regmap, USP_RX_FIFO_OP,
56 USP_RX_FIFO_START, USP_RX_FIFO_START);
58 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
59 USP_RX_ENA, USP_RX_ENA);
62 static void sirf_usp_rx_disable(struct sirf_usp *usp)
64 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
65 USP_RX_ENA, ~USP_RX_ENA);
67 regmap_write(usp->regmap, USP_RX_FIFO_OP, 0);
70 static int sirf_usp_pcm_dai_probe(struct snd_soc_dai *dai)
72 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
74 snd_soc_dai_init_dma_data(dai, &usp->playback_dma_data,
75 &usp->capture_dma_data);
79 static int sirf_usp_pcm_set_dai_fmt(struct snd_soc_dai *dai,
82 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
84 /* set master/slave audio interface */
85 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
86 case SND_SOC_DAIFMT_CBM_CFM:
89 dev_err(dai->dev, "Only CBM and CFM supported\n");
93 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
94 case SND_SOC_DAIFMT_I2S:
95 case SND_SOC_DAIFMT_DSP_A:
96 usp->daifmt_format = (fmt & SND_SOC_DAIFMT_FORMAT_MASK);
99 dev_err(dai->dev, "Only I2S and DSP_A format supported\n");
103 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
104 case SND_SOC_DAIFMT_NB_NF:
106 case SND_SOC_DAIFMT_IB_NF:
107 usp->daifmt_format |= (fmt & SND_SOC_DAIFMT_INV_MASK);
116 static void sirf_usp_i2s_init(struct sirf_usp *usp)
118 /* Configure RISC mode */
119 regmap_update_bits(usp->regmap, USP_RISC_DSP_MODE,
120 USP_RISC_DSP_SEL, ~USP_RISC_DSP_SEL);
123 * Configure DMA IO Length register
124 * Set no limit, USP can receive data continuously until it is diabled
126 regmap_write(usp->regmap, USP_TX_DMA_IO_LEN, 0);
127 regmap_write(usp->regmap, USP_RX_DMA_IO_LEN, 0);
129 /* Configure Mode2 register */
130 regmap_write(usp->regmap, USP_MODE2, (1 << USP_RXD_DELAY_LEN_OFFSET) |
131 (0 << USP_TXD_DELAY_LEN_OFFSET) |
132 USP_TFS_CLK_SLAVE_MODE | USP_RFS_CLK_SLAVE_MODE);
134 /* Configure Mode1 register */
135 regmap_write(usp->regmap, USP_MODE1,
136 USP_SYNC_MODE | USP_EN | USP_TXD_ACT_EDGE_FALLING |
137 USP_RFS_ACT_LEVEL_LOGIC1 | USP_TFS_ACT_LEVEL_LOGIC1 |
138 USP_TX_UFLOW_REPEAT_ZERO | USP_CLOCK_MODE_SLAVE);
140 /* Configure RX DMA IO Control register */
141 regmap_write(usp->regmap, USP_RX_DMA_IO_CTRL, 0);
143 /* Congiure RX FIFO Control register */
144 regmap_write(usp->regmap, USP_RX_FIFO_CTRL,
145 (USP_RX_FIFO_THRESHOLD << USP_RX_FIFO_THD_OFFSET) |
146 (USP_TX_RX_FIFO_WIDTH_DWORD << USP_RX_FIFO_WIDTH_OFFSET));
148 /* Congiure RX FIFO Level Check register */
149 regmap_write(usp->regmap, USP_RX_FIFO_LEVEL_CHK,
150 RX_FIFO_SC(0x04) | RX_FIFO_LC(0x0E) | RX_FIFO_HC(0x1B));
152 /* Configure TX DMA IO Control register*/
153 regmap_write(usp->regmap, USP_TX_DMA_IO_CTRL, 0);
155 /* Configure TX FIFO Control register */
156 regmap_write(usp->regmap, USP_TX_FIFO_CTRL,
157 (USP_TX_FIFO_THRESHOLD << USP_TX_FIFO_THD_OFFSET) |
158 (USP_TX_RX_FIFO_WIDTH_DWORD << USP_TX_FIFO_WIDTH_OFFSET));
159 /* Congiure TX FIFO Level Check register */
160 regmap_write(usp->regmap, USP_TX_FIFO_LEVEL_CHK,
161 TX_FIFO_SC(0x1B) | TX_FIFO_LC(0x0E) | TX_FIFO_HC(0x04));
164 static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
167 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
168 u32 data_len, frame_len, shifter_len;
170 switch (params_format(params)) {
171 case SNDRV_PCM_FORMAT_S16_LE:
175 case SNDRV_PCM_FORMAT_S24_LE:
179 case SNDRV_PCM_FORMAT_S24_3LE:
184 dev_err(dai->dev, "Format unsupported\n");
188 shifter_len = data_len;
190 switch (usp->daifmt_format & SND_SOC_DAIFMT_FORMAT_MASK) {
191 case SND_SOC_DAIFMT_I2S:
192 regmap_update_bits(usp->regmap, USP_RX_FRAME_CTRL,
193 USP_I2S_SYNC_CHG, USP_I2S_SYNC_CHG);
195 case SND_SOC_DAIFMT_DSP_A:
196 regmap_update_bits(usp->regmap, USP_RX_FRAME_CTRL,
197 USP_I2S_SYNC_CHG, 0);
198 frame_len = data_len * params_channels(params);
199 data_len = frame_len;
202 dev_err(dai->dev, "Only support I2S and DSP_A mode\n");
206 switch (usp->daifmt_format & SND_SOC_DAIFMT_INV_MASK) {
207 case SND_SOC_DAIFMT_NB_NF:
209 case SND_SOC_DAIFMT_IB_NF:
210 regmap_update_bits(usp->regmap, USP_MODE1,
211 USP_RXD_ACT_EDGE_FALLING | USP_TXD_ACT_EDGE_FALLING,
212 USP_RXD_ACT_EDGE_FALLING);
218 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
219 regmap_update_bits(usp->regmap, USP_TX_FRAME_CTRL,
220 USP_TXC_DATA_LEN_MASK | USP_TXC_FRAME_LEN_MASK
221 | USP_TXC_SHIFTER_LEN_MASK | USP_TXC_SLAVE_CLK_SAMPLE,
222 ((data_len - 1) << USP_TXC_DATA_LEN_OFFSET)
223 | ((frame_len - 1) << USP_TXC_FRAME_LEN_OFFSET)
224 | ((shifter_len - 1) << USP_TXC_SHIFTER_LEN_OFFSET)
225 | USP_TXC_SLAVE_CLK_SAMPLE);
227 regmap_update_bits(usp->regmap, USP_RX_FRAME_CTRL,
228 USP_RXC_DATA_LEN_MASK | USP_RXC_FRAME_LEN_MASK
229 | USP_RXC_SHIFTER_LEN_MASK | USP_SINGLE_SYNC_MODE,
230 ((data_len - 1) << USP_RXC_DATA_LEN_OFFSET)
231 | ((frame_len - 1) << USP_RXC_FRAME_LEN_OFFSET)
232 | ((shifter_len - 1) << USP_RXC_SHIFTER_LEN_OFFSET)
233 | USP_SINGLE_SYNC_MODE);
238 static int sirf_usp_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
239 struct snd_soc_dai *dai)
241 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
244 case SNDRV_PCM_TRIGGER_START:
245 case SNDRV_PCM_TRIGGER_RESUME:
246 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
247 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
248 sirf_usp_tx_enable(usp);
250 sirf_usp_rx_enable(usp);
252 case SNDRV_PCM_TRIGGER_STOP:
253 case SNDRV_PCM_TRIGGER_SUSPEND:
254 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
255 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
256 sirf_usp_tx_disable(usp);
258 sirf_usp_rx_disable(usp);
265 static const struct snd_soc_dai_ops sirf_usp_pcm_dai_ops = {
266 .trigger = sirf_usp_pcm_trigger,
267 .set_fmt = sirf_usp_pcm_set_dai_fmt,
268 .hw_params = sirf_usp_pcm_hw_params,
271 static struct snd_soc_dai_driver sirf_usp_pcm_dai = {
272 .probe = sirf_usp_pcm_dai_probe,
273 .name = "sirf-usp-pcm",
276 .stream_name = "SiRF USP PCM Playback",
279 .rates = SNDRV_PCM_RATE_8000_192000,
280 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
281 SNDRV_PCM_FMTBIT_S24_3LE,
284 .stream_name = "SiRF USP PCM Capture",
287 .rates = SNDRV_PCM_RATE_8000_192000,
288 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
289 SNDRV_PCM_FMTBIT_S24_3LE,
291 .ops = &sirf_usp_pcm_dai_ops,
294 static int sirf_usp_pcm_runtime_suspend(struct device *dev)
296 struct sirf_usp *usp = dev_get_drvdata(dev);
298 clk_disable_unprepare(usp->clk);
302 static int sirf_usp_pcm_runtime_resume(struct device *dev)
304 struct sirf_usp *usp = dev_get_drvdata(dev);
307 ret = clk_prepare_enable(usp->clk);
309 dev_err(dev, "clk_enable failed: %d\n", ret);
312 sirf_usp_i2s_init(usp);
316 #ifdef CONFIG_PM_SLEEP
317 static int sirf_usp_pcm_suspend(struct device *dev)
319 struct sirf_usp *usp = dev_get_drvdata(dev);
321 if (!pm_runtime_status_suspended(dev)) {
322 regmap_read(usp->regmap, USP_MODE1, &usp->mode1_reg);
323 regmap_read(usp->regmap, USP_MODE2, &usp->mode2_reg);
324 sirf_usp_pcm_runtime_suspend(dev);
329 static int sirf_usp_pcm_resume(struct device *dev)
331 struct sirf_usp *usp = dev_get_drvdata(dev);
334 if (!pm_runtime_status_suspended(dev)) {
335 ret = sirf_usp_pcm_runtime_resume(dev);
338 regmap_write(usp->regmap, USP_MODE1, usp->mode1_reg);
339 regmap_write(usp->regmap, USP_MODE2, usp->mode2_reg);
345 static const struct snd_soc_component_driver sirf_usp_component = {
349 static const struct regmap_config sirf_usp_regmap_config = {
353 .max_register = USP_RX_FIFO_DATA,
354 .cache_type = REGCACHE_NONE,
357 static int sirf_usp_pcm_probe(struct platform_device *pdev)
360 struct sirf_usp *usp;
363 usp = devm_kzalloc(&pdev->dev, sizeof(struct sirf_usp),
368 platform_set_drvdata(pdev, usp);
370 base = devm_platform_ioremap_resource(pdev, 0);
372 return PTR_ERR(base);
373 usp->regmap = devm_regmap_init_mmio(&pdev->dev, base,
374 &sirf_usp_regmap_config);
375 if (IS_ERR(usp->regmap))
376 return PTR_ERR(usp->regmap);
378 usp->clk = devm_clk_get(&pdev->dev, NULL);
379 if (IS_ERR(usp->clk)) {
380 dev_err(&pdev->dev, "Get clock failed.\n");
381 return PTR_ERR(usp->clk);
384 pm_runtime_enable(&pdev->dev);
385 if (!pm_runtime_enabled(&pdev->dev)) {
386 ret = sirf_usp_pcm_runtime_resume(&pdev->dev);
391 ret = devm_snd_soc_register_component(&pdev->dev, &sirf_usp_component,
392 &sirf_usp_pcm_dai, 1);
394 dev_err(&pdev->dev, "Register Audio SoC dai failed.\n");
397 return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
400 static int sirf_usp_pcm_remove(struct platform_device *pdev)
402 if (!pm_runtime_enabled(&pdev->dev))
403 sirf_usp_pcm_runtime_suspend(&pdev->dev);
405 pm_runtime_disable(&pdev->dev);
409 static const struct of_device_id sirf_usp_pcm_of_match[] = {
410 { .compatible = "sirf,prima2-usp-pcm", },
413 MODULE_DEVICE_TABLE(of, sirf_usp_pcm_of_match);
415 static const struct dev_pm_ops sirf_usp_pcm_pm_ops = {
416 SET_RUNTIME_PM_OPS(sirf_usp_pcm_runtime_suspend,
417 sirf_usp_pcm_runtime_resume, NULL)
418 SET_SYSTEM_SLEEP_PM_OPS(sirf_usp_pcm_suspend, sirf_usp_pcm_resume)
421 static struct platform_driver sirf_usp_pcm_driver = {
423 .name = "sirf-usp-pcm",
424 .of_match_table = sirf_usp_pcm_of_match,
425 .pm = &sirf_usp_pcm_pm_ops,
427 .probe = sirf_usp_pcm_probe,
428 .remove = sirf_usp_pcm_remove,
431 module_platform_driver(sirf_usp_pcm_driver);
433 MODULE_DESCRIPTION("SiRF SoC USP PCM bus driver");
434 MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
435 MODULE_LICENSE("GPL v2");