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22#include <linux/init.h>
23#include <linux/module.h>
24#include <linux/platform_device.h>
25#include <linux/delay.h>
26#include <linux/clk.h>
27#include <linux/slab.h>
28#include <linux/pxa2xx_ssp.h>
29#include <linux/io.h>
30#include <linux/dmaengine.h>
31
32#include <sound/core.h>
33#include <sound/pcm.h>
34#include <sound/initval.h>
35#include <sound/pcm_params.h>
36#include <sound/soc.h>
37#include <sound/pxa2xx-lib.h>
38#include <sound/dmaengine_pcm.h>
39#include "mmp-sspa.h"
40
41
42
43
44struct sspa_priv {
45 struct ssp_device *sspa;
46 struct snd_dmaengine_dai_dma_data *dma_params;
47 struct clk *audio_clk;
48 struct clk *sysclk;
49 int dai_fmt;
50 int running_cnt;
51};
52
53static void mmp_sspa_write_reg(struct ssp_device *sspa, u32 reg, u32 val)
54{
55 __raw_writel(val, sspa->mmio_base + reg);
56}
57
58static u32 mmp_sspa_read_reg(struct ssp_device *sspa, u32 reg)
59{
60 return __raw_readl(sspa->mmio_base + reg);
61}
62
63static void mmp_sspa_tx_enable(struct ssp_device *sspa)
64{
65 unsigned int sspa_sp;
66
67 sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
68 sspa_sp |= SSPA_SP_S_EN;
69 sspa_sp |= SSPA_SP_WEN;
70 mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
71}
72
73static void mmp_sspa_tx_disable(struct ssp_device *sspa)
74{
75 unsigned int sspa_sp;
76
77 sspa_sp = mmp_sspa_read_reg(sspa, SSPA_TXSP);
78 sspa_sp &= ~SSPA_SP_S_EN;
79 sspa_sp |= SSPA_SP_WEN;
80 mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
81}
82
83static void mmp_sspa_rx_enable(struct ssp_device *sspa)
84{
85 unsigned int sspa_sp;
86
87 sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
88 sspa_sp |= SSPA_SP_S_EN;
89 sspa_sp |= SSPA_SP_WEN;
90 mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
91}
92
93static void mmp_sspa_rx_disable(struct ssp_device *sspa)
94{
95 unsigned int sspa_sp;
96
97 sspa_sp = mmp_sspa_read_reg(sspa, SSPA_RXSP);
98 sspa_sp &= ~SSPA_SP_S_EN;
99 sspa_sp |= SSPA_SP_WEN;
100 mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
101}
102
103static int mmp_sspa_startup(struct snd_pcm_substream *substream,
104 struct snd_soc_dai *dai)
105{
106 struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
107
108 clk_enable(priv->sysclk);
109 clk_enable(priv->sspa->clk);
110
111 return 0;
112}
113
114static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
115 struct snd_soc_dai *dai)
116{
117 struct sspa_priv *priv = snd_soc_dai_get_drvdata(dai);
118
119 clk_disable(priv->sspa->clk);
120 clk_disable(priv->sysclk);
121
122}
123
124
125
126
127static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
128 int clk_id, unsigned int freq, int dir)
129{
130 struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
131 int ret = 0;
132
133 switch (clk_id) {
134 case MMP_SSPA_CLK_AUDIO:
135 ret = clk_set_rate(priv->audio_clk, freq);
136 if (ret)
137 return ret;
138 break;
139 case MMP_SSPA_CLK_PLL:
140 case MMP_SSPA_CLK_VCXO:
141
142 return -EINVAL;
143 default:
144 return -EINVAL;
145 }
146
147 return 0;
148}
149
150static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
151 int source, unsigned int freq_in,
152 unsigned int freq_out)
153{
154 struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai);
155 int ret = 0;
156
157 switch (pll_id) {
158 case MMP_SYSCLK:
159 ret = clk_set_rate(priv->sysclk, freq_out);
160 if (ret)
161 return ret;
162 break;
163 case MMP_SSPA_CLK:
164 ret = clk_set_rate(priv->sspa->clk, freq_out);
165 if (ret)
166 return ret;
167 break;
168 default:
169 return -ENODEV;
170 }
171
172 return 0;
173}
174
175
176
177
178
179
180static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
181 unsigned int fmt)
182{
183 struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(cpu_dai);
184 struct ssp_device *sspa = sspa_priv->sspa;
185 u32 sspa_sp, sspa_ctrl;
186
187
188 if (sspa_priv->dai_fmt == fmt)
189 return 0;
190
191
192 if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) ||
193 (mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) {
194 dev_err(&sspa->pdev->dev,
195 "can't change hardware dai format: stream is in use\n");
196 return -EINVAL;
197 }
198
199
200 sspa_sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
201 sspa_ctrl = 0;
202
203 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
204 case SND_SOC_DAIFMT_CBS_CFS:
205 sspa_sp |= SSPA_SP_MSL;
206 break;
207 case SND_SOC_DAIFMT_CBM_CFM:
208 break;
209 default:
210 return -EINVAL;
211 }
212
213 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
214 case SND_SOC_DAIFMT_NB_NF:
215 sspa_sp |= SSPA_SP_FSP;
216 break;
217 default:
218 return -EINVAL;
219 }
220
221 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
222 case SND_SOC_DAIFMT_I2S:
223 sspa_sp |= SSPA_TXSP_FPER(63);
224 sspa_sp |= SSPA_SP_FWID(31);
225 sspa_ctrl |= SSPA_CTL_XDATDLY(1);
226 break;
227 default:
228 return -EINVAL;
229 }
230
231 mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
232 mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
233
234 sspa_sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
235 mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
236 mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp);
237
238
239
240
241
242
243
244
245 sspa_sp &= ~SSPA_SP_MSL;
246 mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp);
247
248 mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
249 mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
250
251
252
253
254
255 sspa_priv->dai_fmt = fmt;
256 return 0;
257}
258
259
260
261
262
263static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
264 struct snd_pcm_hw_params *params,
265 struct snd_soc_dai *dai)
266{
267 struct snd_soc_pcm_runtime *rtd = substream->private_data;
268 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
269 struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
270 struct ssp_device *sspa = sspa_priv->sspa;
271 struct snd_dmaengine_dai_dma_data *dma_params;
272 u32 sspa_ctrl;
273
274 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
275 sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_TXCTL);
276 else
277 sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_RXCTL);
278
279 sspa_ctrl &= ~SSPA_CTL_XFRLEN1_MASK;
280 sspa_ctrl |= SSPA_CTL_XFRLEN1(params_channels(params) - 1);
281 sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
282 sspa_ctrl |= SSPA_CTL_XWDLEN1(SSPA_CTL_32_BITS);
283 sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
284
285 switch (params_format(params)) {
286 case SNDRV_PCM_FORMAT_S8:
287 sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_8_BITS);
288 break;
289 case SNDRV_PCM_FORMAT_S16_LE:
290 sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_16_BITS);
291 break;
292 case SNDRV_PCM_FORMAT_S20_3LE:
293 sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_20_BITS);
294 break;
295 case SNDRV_PCM_FORMAT_S24_3LE:
296 sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_24_BITS);
297 break;
298 case SNDRV_PCM_FORMAT_S32_LE:
299 sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_32_BITS);
300 break;
301 default:
302 return -EINVAL;
303 }
304
305 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
306 mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl);
307 mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1);
308 } else {
309 mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl);
310 mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0);
311 }
312
313 dma_params = &sspa_priv->dma_params[substream->stream];
314 dma_params->addr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
315 (sspa->phys_base + SSPA_TXD) :
316 (sspa->phys_base + SSPA_RXD);
317 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_params);
318 return 0;
319}
320
321static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
322 struct snd_soc_dai *dai)
323{
324 struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai);
325 struct ssp_device *sspa = sspa_priv->sspa;
326 int ret = 0;
327
328 switch (cmd) {
329 case SNDRV_PCM_TRIGGER_START:
330 case SNDRV_PCM_TRIGGER_RESUME:
331 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
332
333
334
335
336
337
338 if (!sspa_priv->running_cnt)
339 mmp_sspa_rx_enable(sspa);
340
341 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
342 mmp_sspa_tx_enable(sspa);
343
344 sspa_priv->running_cnt++;
345 break;
346
347 case SNDRV_PCM_TRIGGER_STOP:
348 case SNDRV_PCM_TRIGGER_SUSPEND:
349 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
350 sspa_priv->running_cnt--;
351
352 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
353 mmp_sspa_tx_disable(sspa);
354
355
356 if (!sspa_priv->running_cnt)
357 mmp_sspa_rx_disable(sspa);
358 break;
359
360 default:
361 ret = -EINVAL;
362 }
363
364 return ret;
365}
366
367static int mmp_sspa_probe(struct snd_soc_dai *dai)
368{
369 struct sspa_priv *priv = dev_get_drvdata(dai->dev);
370
371 snd_soc_dai_set_drvdata(dai, priv);
372 return 0;
373
374}
375
376#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
377#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
378 SNDRV_PCM_FMTBIT_S16_LE | \
379 SNDRV_PCM_FMTBIT_S24_LE | \
380 SNDRV_PCM_FMTBIT_S32_LE)
381
382static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
383 .startup = mmp_sspa_startup,
384 .shutdown = mmp_sspa_shutdown,
385 .trigger = mmp_sspa_trigger,
386 .hw_params = mmp_sspa_hw_params,
387 .set_sysclk = mmp_sspa_set_dai_sysclk,
388 .set_pll = mmp_sspa_set_dai_pll,
389 .set_fmt = mmp_sspa_set_dai_fmt,
390};
391
392static struct snd_soc_dai_driver mmp_sspa_dai = {
393 .probe = mmp_sspa_probe,
394 .playback = {
395 .channels_min = 1,
396 .channels_max = 128,
397 .rates = MMP_SSPA_RATES,
398 .formats = MMP_SSPA_FORMATS,
399 },
400 .capture = {
401 .channels_min = 1,
402 .channels_max = 2,
403 .rates = MMP_SSPA_RATES,
404 .formats = MMP_SSPA_FORMATS,
405 },
406 .ops = &mmp_sspa_dai_ops,
407};
408
409static const struct snd_soc_component_driver mmp_sspa_component = {
410 .name = "mmp-sspa",
411};
412
413static int asoc_mmp_sspa_probe(struct platform_device *pdev)
414{
415 struct sspa_priv *priv;
416 struct resource *res;
417
418 priv = devm_kzalloc(&pdev->dev,
419 sizeof(struct sspa_priv), GFP_KERNEL);
420 if (!priv)
421 return -ENOMEM;
422
423 priv->sspa = devm_kzalloc(&pdev->dev,
424 sizeof(struct ssp_device), GFP_KERNEL);
425 if (priv->sspa == NULL)
426 return -ENOMEM;
427
428 priv->dma_params = devm_kcalloc(&pdev->dev,
429 2, sizeof(struct snd_dmaengine_dai_dma_data),
430 GFP_KERNEL);
431 if (priv->dma_params == NULL)
432 return -ENOMEM;
433
434 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
435 priv->sspa->mmio_base = devm_ioremap_resource(&pdev->dev, res);
436 if (IS_ERR(priv->sspa->mmio_base))
437 return PTR_ERR(priv->sspa->mmio_base);
438
439 priv->sspa->clk = devm_clk_get(&pdev->dev, NULL);
440 if (IS_ERR(priv->sspa->clk))
441 return PTR_ERR(priv->sspa->clk);
442
443 priv->audio_clk = clk_get(NULL, "mmp-audio");
444 if (IS_ERR(priv->audio_clk))
445 return PTR_ERR(priv->audio_clk);
446
447 priv->sysclk = clk_get(NULL, "mmp-sysclk");
448 if (IS_ERR(priv->sysclk)) {
449 clk_put(priv->audio_clk);
450 return PTR_ERR(priv->sysclk);
451 }
452 clk_enable(priv->audio_clk);
453 priv->dai_fmt = (unsigned int) -1;
454 platform_set_drvdata(pdev, priv);
455
456 return devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
457 &mmp_sspa_dai, 1);
458}
459
460static int asoc_mmp_sspa_remove(struct platform_device *pdev)
461{
462 struct sspa_priv *priv = platform_get_drvdata(pdev);
463
464 clk_disable(priv->audio_clk);
465 clk_put(priv->audio_clk);
466 clk_put(priv->sysclk);
467 return 0;
468}
469
470static struct platform_driver asoc_mmp_sspa_driver = {
471 .driver = {
472 .name = "mmp-sspa-dai",
473 },
474 .probe = asoc_mmp_sspa_probe,
475 .remove = asoc_mmp_sspa_remove,
476};
477
478module_platform_driver(asoc_mmp_sspa_driver);
479
480MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
481MODULE_DESCRIPTION("MMP SSPA SoC Interface");
482MODULE_LICENSE("GPL");
483MODULE_ALIAS("platform:mmp-sspa-dai");
484
