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8#include <linux/module.h>
9#include <linux/io.h>
10#include <linux/of.h>
11#include <linux/clk.h>
12#include <linux/pm_runtime.h>
13#include <sound/soc.h>
14#include <sound/pcm_params.h>
15#include <sound/dmaengine_pcm.h>
16
17#include "sirf-usp.h"
18
19struct sirf_usp {
20 struct regmap *regmap;
21 struct clk *clk;
22 u32 mode1_reg;
23 u32 mode2_reg;
24 int daifmt_format;
25 struct snd_dmaengine_dai_dma_data playback_dma_data;
26 struct snd_dmaengine_dai_dma_data capture_dma_data;
27};
28
29static void sirf_usp_tx_enable(struct sirf_usp *usp)
30{
31 regmap_update_bits(usp->regmap, USP_TX_FIFO_OP,
32 USP_TX_FIFO_RESET, USP_TX_FIFO_RESET);
33 regmap_write(usp->regmap, USP_TX_FIFO_OP, 0);
34
35 regmap_update_bits(usp->regmap, USP_TX_FIFO_OP,
36 USP_TX_FIFO_START, USP_TX_FIFO_START);
37
38 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
39 USP_TX_ENA, USP_TX_ENA);
40}
41
42static void sirf_usp_tx_disable(struct sirf_usp *usp)
43{
44 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
45 USP_TX_ENA, ~USP_TX_ENA);
46
47 regmap_write(usp->regmap, USP_TX_FIFO_OP, 0);
48}
49
50static void sirf_usp_rx_enable(struct sirf_usp *usp)
51{
52 regmap_update_bits(usp->regmap, USP_RX_FIFO_OP,
53 USP_RX_FIFO_RESET, USP_RX_FIFO_RESET);
54 regmap_write(usp->regmap, USP_RX_FIFO_OP, 0);
55
56 regmap_update_bits(usp->regmap, USP_RX_FIFO_OP,
57 USP_RX_FIFO_START, USP_RX_FIFO_START);
58
59 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
60 USP_RX_ENA, USP_RX_ENA);
61}
62
63static void sirf_usp_rx_disable(struct sirf_usp *usp)
64{
65 regmap_update_bits(usp->regmap, USP_TX_RX_ENABLE,
66 USP_RX_ENA, ~USP_RX_ENA);
67
68 regmap_write(usp->regmap, USP_RX_FIFO_OP, 0);
69}
70
71static int sirf_usp_pcm_dai_probe(struct snd_soc_dai *dai)
72{
73 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);
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 clk_disable_unprepare(usp->clk);
298 return 0;
299}
300
301static int sirf_usp_pcm_runtime_resume(struct device *dev)
302{
303 struct sirf_usp *usp = dev_get_drvdata(dev);
304 int ret;
305 ret = clk_prepare_enable(usp->clk);
306 if (ret) {
307 dev_err(dev, "clk_enable failed: %d\n", ret);
308 return ret;
309 }
310 sirf_usp_i2s_init(usp);
311 return 0;
312}
313
314#ifdef CONFIG_PM_SLEEP
315static int sirf_usp_pcm_suspend(struct device *dev)
316{
317 struct sirf_usp *usp = dev_get_drvdata(dev);
318
319 if (!pm_runtime_status_suspended(dev)) {
320 regmap_read(usp->regmap, USP_MODE1, &usp->mode1_reg);
321 regmap_read(usp->regmap, USP_MODE2, &usp->mode2_reg);
322 sirf_usp_pcm_runtime_suspend(dev);
323 }
324 return 0;
325}
326
327static int sirf_usp_pcm_resume(struct device *dev)
328{
329 struct sirf_usp *usp = dev_get_drvdata(dev);
330 int ret;
331
332 if (!pm_runtime_status_suspended(dev)) {
333 ret = sirf_usp_pcm_runtime_resume(dev);
334 if (ret)
335 return ret;
336 regmap_write(usp->regmap, USP_MODE1, usp->mode1_reg);
337 regmap_write(usp->regmap, USP_MODE2, usp->mode2_reg);
338 }
339 return 0;
340}
341#endif
342
343static const struct snd_soc_component_driver sirf_usp_component = {
344 .name = "sirf-usp",
345};
346
347static const struct regmap_config sirf_usp_regmap_config = {
348 .reg_bits = 32,
349 .reg_stride = 4,
350 .val_bits = 32,
351 .max_register = USP_RX_FIFO_DATA,
352 .cache_type = REGCACHE_NONE,
353};
354
355static int sirf_usp_pcm_probe(struct platform_device *pdev)
356{
357 int ret;
358 struct sirf_usp *usp;
359 void __iomem *base;
360 struct resource *mem_res;
361
362 usp = devm_kzalloc(&pdev->dev, sizeof(struct sirf_usp),
363 GFP_KERNEL);
364 if (!usp)
365 return -ENOMEM;
366
367 platform_set_drvdata(pdev, usp);
368
369 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
370 base = devm_ioremap(&pdev->dev, mem_res->start,
371 resource_size(mem_res));
372 if (base == NULL)
373 return -ENOMEM;
374 usp->regmap = devm_regmap_init_mmio(&pdev->dev, base,
375 &sirf_usp_regmap_config);
376 if (IS_ERR(usp->regmap))
377 return PTR_ERR(usp->regmap);
378
379 usp->clk = devm_clk_get(&pdev->dev, NULL);
380 if (IS_ERR(usp->clk)) {
381 dev_err(&pdev->dev, "Get clock failed.\n");
382 return PTR_ERR(usp->clk);
383 }
384
385 pm_runtime_enable(&pdev->dev);
386 if (!pm_runtime_enabled(&pdev->dev)) {
387 ret = sirf_usp_pcm_runtime_resume(&pdev->dev);
388 if (ret)
389 return ret;
390 }
391
392 ret = devm_snd_soc_register_component(&pdev->dev, &sirf_usp_component,
393 &sirf_usp_pcm_dai, 1);
394 if (ret) {
395 dev_err(&pdev->dev, "Register Audio SoC dai failed.\n");
396 return ret;
397 }
398 return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
399}
400
401static int sirf_usp_pcm_remove(struct platform_device *pdev)
402{
403 if (!pm_runtime_enabled(&pdev->dev))
404 sirf_usp_pcm_runtime_suspend(&pdev->dev);
405 else
406 pm_runtime_disable(&pdev->dev);
407 return 0;
408}
409
410static const struct of_device_id sirf_usp_pcm_of_match[] = {
411 { .compatible = "sirf,prima2-usp-pcm", },
412 {}
413};
414MODULE_DEVICE_TABLE(of, sirf_usp_pcm_of_match);
415
416static const struct dev_pm_ops sirf_usp_pcm_pm_ops = {
417 SET_RUNTIME_PM_OPS(sirf_usp_pcm_runtime_suspend,
418 sirf_usp_pcm_runtime_resume, NULL)
419 SET_SYSTEM_SLEEP_PM_OPS(sirf_usp_pcm_suspend, sirf_usp_pcm_resume)
420};
421
422static struct platform_driver sirf_usp_pcm_driver = {
423 .driver = {
424 .name = "sirf-usp-pcm",
425 .of_match_table = sirf_usp_pcm_of_match,
426 .pm = &sirf_usp_pcm_pm_ops,
427 },
428 .probe = sirf_usp_pcm_probe,
429 .remove = sirf_usp_pcm_remove,
430};
431
432module_platform_driver(sirf_usp_pcm_driver);
433
434MODULE_DESCRIPTION("SiRF SoC USP PCM bus driver");
435MODULE_AUTHOR("RongJun Ying <Rongjun.Ying@csr.com>");
436MODULE_LICENSE("GPL v2");
437
