1
2
3
4
5
6
7#include <linux/module.h>
8#include <linux/io.h>
9#include <linux/of.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>
15
16#include "sirf-usp.h"
17
18struct sirf_usp {
19 struct regmap *regmap;
20 struct clk *clk;
21 u32 mode1_reg;
22 u32 mode2_reg;
23 int daifmt_format;
24 struct snd_dmaengine_dai_dma_data playback_dma_data;
25 struct snd_dmaengine_dai_dma_data capture_dma_data;
26};
27
28static void sirf_usp_tx_enable(struct sirf_usp *usp)
29{
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);
33
34 regmap_update_bits(usp->regmap, USP_TX_FIFO_OP,
35 USP_TX_FIFO_START, USP_TX_FIFO_START);
36
37 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
38 USP_TX_ENA, USP_TX_ENA);
39}
40
41static void sirf_usp_tx_disable(struct sirf_usp *usp)
42{
43 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
44 USP_TX_ENA, ~USP_TX_ENA);
45
46 regmap_write(usp->regmap, USP_TX_FIFO_OP, 0);
47}
48
49static void sirf_usp_rx_enable(struct sirf_usp *usp)
50{
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);
54
55 regmap_update_bits(usp->regmap, USP_RX_FIFO_OP,
56 USP_RX_FIFO_START, USP_RX_FIFO_START);
57
58 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
59 USP_RX_ENA, USP_RX_ENA);
60}
61
62static void sirf_usp_rx_disable(struct sirf_usp *usp)
63{
64 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
65 USP_RX_ENA, ~USP_RX_ENA);
66
67 regmap_write(usp->regmap, USP_RX_FIFO_OP, 0);
68}
69
70static int sirf_usp_pcm_dai_probe(struct snd_soc_dai *dai)
71{
72 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
73
74 snd_soc_dai_init_dma_data(dai, &usp->playback_dma_data,
75 &usp->capture_dma_data);
76 return 0;
77}
78
79static int sirf_usp_pcm_set_dai_fmt(struct snd_soc_dai *dai,
80 unsigned int fmt)
81{
82 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
83
84
85 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
86 case SND_SOC_DAIFMT_CBM_CFM:
87 break;
88 default:
89 dev_err(dai->dev, "Only CBM and CFM supported\n");
90 return -EINVAL;
91 }
92
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);
97 break;
98 default:
99 dev_err(dai->dev, "Only I2S and DSP_A format supported\n");
100 return -EINVAL;
101 }
102
103 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
104 case SND_SOC_DAIFMT_NB_NF:
105 break;
106 case SND_SOC_DAIFMT_IB_NF:
107 usp->daifmt_format |= (fmt & SND_SOC_DAIFMT_INV_MASK);
108 break;
109 default:
110 return -EINVAL;
111 }
112
113 return 0;
114}
115
116static void sirf_usp_i2s_init(struct sirf_usp *usp)
117{
118
119 regmap_update_bits(usp->regmap, USP_RISC_DSP_MODE,
120 USP_RISC_DSP_SEL, ~USP_RISC_DSP_SEL);
121
122
123
124
125
126 regmap_write(usp->regmap, USP_TX_DMA_IO_LEN, 0);
127 regmap_write(usp->regmap, USP_RX_DMA_IO_LEN, 0);
128
129
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);
133
134
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);
139
140
141 regmap_write(usp->regmap, USP_RX_DMA_IO_CTRL, 0);
142
143
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));
147
148
149 regmap_write(usp->regmap, USP_RX_FIFO_LEVEL_CHK,
150 RX_FIFO_SC(0x04) | RX_FIFO_LC(0x0E) | RX_FIFO_HC(0x1B));
151
152
153 regmap_write(usp->regmap, USP_TX_DMA_IO_CTRL, 0);
154
155
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
160 regmap_write(usp->regmap, USP_TX_FIFO_LEVEL_CHK,
161 TX_FIFO_SC(0x1B) | TX_FIFO_LC(0x0E) | TX_FIFO_HC(0x04));
162}
163
164static int sirf_usp_pcm_hw_params(struct snd_pcm_substream *substream,
165 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
166{
167 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
168 u32 data_len, frame_len, shifter_len;
169
170 switch (params_format(params)) {
171 case SNDRV_PCM_FORMAT_S16_LE:
172 data_len = 16;
173 frame_len = 16;
174 break;
175 case SNDRV_PCM_FORMAT_S24_LE:
176 data_len = 24;
177 frame_len = 32;
178 break;
179 case SNDRV_PCM_FORMAT_S24_3LE:
180 data_len = 24;
181 frame_len = 24;
182 break;
183 default:
184 dev_err(dai->dev, "Format unsupported\n");
185 return -EINVAL;
186 }
187
188 shifter_len = data_len;
189
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);
194 break;
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;
200 break;
201 default:
202 dev_err(dai->dev, "Only support I2S and DSP_A mode\n");
203 return -EINVAL;
204 }
205
206 switch (usp->daifmt_format & SND_SOC_DAIFMT_INV_MASK) {
207 case SND_SOC_DAIFMT_NB_NF:
208 break;
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);
213 break;
214 default:
215 return -EINVAL;
216 }
217
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);
226 else
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);
234
235 return 0;
236}
237
238static int sirf_usp_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
239 struct snd_soc_dai *dai)
240{
241 struct sirf_usp *usp = snd_soc_dai_get_drvdata(dai);
242
243 switch (cmd) {
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);
249 else
250 sirf_usp_rx_enable(usp);
251 break;
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);
257 else
258 sirf_usp_rx_disable(usp);
259 break;
260 }
261
262 return 0;
263}
264
265static 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,
269};
270
271static struct snd_soc_dai_driver sirf_usp_pcm_dai = {
272 .probe = sirf_usp_pcm_dai_probe,
273 .name = "sirf-usp-pcm",
274 .id = 0,
275 .playback = {
276 .stream_name = "SiRF USP PCM Playback",
277 .channels_min = 1,
278 .channels_max = 2,
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,
282 },
283 .capture = {
284 .stream_name = "SiRF USP PCM Capture",
285 .channels_min = 1,
286 .channels_max = 2,
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,
290 },
291 .ops = &sirf_usp_pcm_dai_ops,
292};
293
294static int sirf_usp_pcm_runtime_suspend(struct device *dev)
295{
296 struct sirf_usp *usp = dev_get_drvdata(dev);
297
298 clk_disable_unprepare(usp->clk);
299 return 0;
300}
301
302static int sirf_usp_pcm_runtime_resume(struct device *dev)
303{
304 struct sirf_usp *usp = dev_get_drvdata(dev);
305 int ret;
306
307 ret = clk_prepare_enable(usp->clk);
308 if (ret) {
309 dev_err(dev, "clk_enable failed: %d\n", ret);
310 return ret;
311 }
312 sirf_usp_i2s_init(usp);
313 return 0;
314}
315
316#ifdef CONFIG_PM_SLEEP
317static int sirf_usp_pcm_suspend(struct device *dev)
318{
319 struct sirf_usp *usp = dev_get_drvdata(dev);
320
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);
325 }
326 return 0;
327}
328
329static int sirf_usp_pcm_resume(struct device *dev)
330{
331 struct sirf_usp *usp = dev_get_drvdata(dev);
332 int ret;
333
334 if (!pm_runtime_status_suspended(dev)) {
335 ret = sirf_usp_pcm_runtime_resume(dev);
336 if (ret)
337 return ret;
338 regmap_write(usp->regmap, USP_MODE1, usp->mode1_reg);
339 regmap_write(usp->regmap, USP_MODE2, usp->mode2_reg);
340 }
341 return 0;
342}
343#endif
344
345static const struct snd_soc_component_driver sirf_usp_component = {
346 .name = "sirf-usp",
347};
348
349static const struct regmap_config sirf_usp_regmap_config = {
350 .reg_bits = 32,
351 .reg_stride = 4,
352 .val_bits = 32,
353 .max_register = USP_RX_FIFO_DATA,
354 .cache_type = REGCACHE_NONE,
355};
356
357static int sirf_usp_pcm_probe(struct platform_device *pdev)
358{
359 int ret;
360 struct sirf_usp *usp;
361 void __iomem *base;
362
363 usp = devm_kzalloc(&pdev->dev, sizeof(struct sirf_usp),
364 GFP_KERNEL);
365 if (!usp)
366 return -ENOMEM;
367
368 platform_set_drvdata(pdev, usp);
369
370 base = devm_platform_ioremap_resource(pdev, 0);
371 if (IS_ERR(base))
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);
377
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);
382 }
383
384 pm_runtime_enable(&pdev->dev);
385 if (!pm_runtime_enabled(&pdev->dev)) {
386 ret = sirf_usp_pcm_runtime_resume(&pdev->dev);
387 if (ret)
388 return ret;
389 }
390
391 ret = devm_snd_soc_register_component(&pdev->dev, &sirf_usp_component,
392 &sirf_usp_pcm_dai, 1);
393 if (ret) {
394 dev_err(&pdev->dev, "Register Audio SoC dai failed.\n");
395 return ret;
396 }
397 return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
398}
399
400static int sirf_usp_pcm_remove(struct platform_device *pdev)
401{
402 if (!pm_runtime_enabled(&pdev->dev))
403 sirf_usp_pcm_runtime_suspend(&pdev->dev);
404 else
405 pm_runtime_disable(&pdev->dev);
406 return 0;
407}
408
409static const struct of_device_id sirf_usp_pcm_of_match[] = {
410 { .compatible = "sirf,prima2-usp-pcm", },
411 {}
412};
413MODULE_DEVICE_TABLE(of, sirf_usp_pcm_of_match);
414
415static 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)
419};
420
421static struct platform_driver sirf_usp_pcm_driver = {
422 .driver = {
423 .name = "sirf-usp-pcm",
424 .of_match_table = sirf_usp_pcm_of_match,
425 .pm = &sirf_usp_pcm_pm_ops,
426 },
427 .probe = sirf_usp_pcm_probe,
428 .remove = sirf_usp_pcm_remove,
429};
430
431module_platform_driver(sirf_usp_pcm_driver);
432
433MODULE_DESCRIPTION("SiRF SoC USP PCM bus driver");
434MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
435MODULE_LICENSE("GPL v2");
436
