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8#include <linux/init.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/delay.h>
12#include <linux/clk.h>
13#include <linux/slab.h>
14#include <linux/io.h>
15#include <linux/dmaengine.h>
16#include <linux/pm_runtime.h>
17
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/initval.h>
21#include <sound/pcm_params.h>
22#include <sound/soc.h>
23#include <sound/pxa2xx-lib.h>
24#include <sound/dmaengine_pcm.h>
25#include "mmp-sspa.h"
26
27
28
29
30struct sspa_priv {
31 void __iomem *tx_base;
32 void __iomem *rx_base;
33
34 struct snd_dmaengine_dai_dma_data playback_dma_data;
35 struct snd_dmaengine_dai_dma_data capture_dma_data;
36 struct clk *clk;
37 struct clk *audio_clk;
38 struct clk *sysclk;
39
40 int running_cnt;
41 u32 sp;
42 u32 ctrl;
43};
44
45static void mmp_sspa_tx_enable(struct sspa_priv *sspa)
46{
47 unsigned int sspa_sp = sspa->sp;
48
49 sspa_sp &= ~SSPA_SP_MSL;
50 sspa_sp |= SSPA_SP_S_EN;
51 sspa_sp |= SSPA_SP_WEN;
52 __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
53}
54
55static void mmp_sspa_tx_disable(struct sspa_priv *sspa)
56{
57 unsigned int sspa_sp = sspa->sp;
58
59 sspa_sp &= ~SSPA_SP_MSL;
60 sspa_sp &= ~SSPA_SP_S_EN;
61 sspa_sp |= SSPA_SP_WEN;
62 __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
63}
64
65static void mmp_sspa_rx_enable(struct sspa_priv *sspa)
66{
67 unsigned int sspa_sp = sspa->sp;
68
69 sspa_sp |= SSPA_SP_S_EN;
70 sspa_sp |= SSPA_SP_WEN;
71 __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
72}
73
74static void mmp_sspa_rx_disable(struct sspa_priv *sspa)
75{
76 unsigned int sspa_sp = sspa->sp;
77
78 sspa_sp &= ~SSPA_SP_S_EN;
79 sspa_sp |= SSPA_SP_WEN;
80 __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
81}
82
83static int mmp_sspa_startup(struct snd_pcm_substream *substream,
84 struct snd_soc_dai *dai)
85{
86 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
87
88 clk_prepare_enable(sspa->sysclk);
89 clk_prepare_enable(sspa->clk);
90
91 return 0;
92}
93
94static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
95 struct snd_soc_dai *dai)
96{
97 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
98
99 clk_disable_unprepare(sspa->clk);
100 clk_disable_unprepare(sspa->sysclk);
101}
102
103
104
105
106static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
107 int clk_id, unsigned int freq, int dir)
108{
109 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
110 struct device *dev = cpu_dai->component->dev;
111 int ret = 0;
112
113 if (dev->of_node)
114 return -ENOTSUPP;
115
116 switch (clk_id) {
117 case MMP_SSPA_CLK_AUDIO:
118 ret = clk_set_rate(sspa->audio_clk, freq);
119 if (ret)
120 return ret;
121 break;
122 case MMP_SSPA_CLK_PLL:
123 case MMP_SSPA_CLK_VCXO:
124
125 return -EINVAL;
126 default:
127 return -EINVAL;
128 }
129
130 return 0;
131}
132
133static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
134 int source, unsigned int freq_in,
135 unsigned int freq_out)
136{
137 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
138 struct device *dev = cpu_dai->component->dev;
139 int ret = 0;
140
141 if (dev->of_node)
142 return -ENOTSUPP;
143
144 switch (pll_id) {
145 case MMP_SYSCLK:
146 ret = clk_set_rate(sspa->sysclk, freq_out);
147 if (ret)
148 return ret;
149 break;
150 case MMP_SSPA_CLK:
151 ret = clk_set_rate(sspa->clk, freq_out);
152 if (ret)
153 return ret;
154 break;
155 default:
156 return -ENODEV;
157 }
158
159 return 0;
160}
161
162
163
164
165static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
166 unsigned int fmt)
167{
168 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
169
170
171 sspa->sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
172 sspa->ctrl = 0;
173
174 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
175 case SND_SOC_DAIFMT_CBS_CFS:
176 sspa->sp |= SSPA_SP_MSL;
177 break;
178 case SND_SOC_DAIFMT_CBM_CFM:
179 break;
180 default:
181 return -EINVAL;
182 }
183
184 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
185 case SND_SOC_DAIFMT_NB_NF:
186 sspa->sp |= SSPA_SP_FSP;
187 break;
188 default:
189 return -EINVAL;
190 }
191
192 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
193 case SND_SOC_DAIFMT_I2S:
194 sspa->ctrl |= SSPA_CTL_XDATDLY(1);
195 break;
196 default:
197 return -EINVAL;
198 }
199
200
201
202
203
204 return 0;
205}
206
207
208
209
210
211static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
212 struct snd_pcm_hw_params *params,
213 struct snd_soc_dai *dai)
214{
215 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
216 struct device *dev = dai->component->dev;
217 u32 sspa_ctrl = sspa->ctrl;
218 int bits;
219 int bitval;
220
221 switch (params_format(params)) {
222 case SNDRV_PCM_FORMAT_S8:
223 bits = 8;
224 bitval = SSPA_CTL_8_BITS;
225 break;
226 case SNDRV_PCM_FORMAT_S16_LE:
227 bits = 16;
228 bitval = SSPA_CTL_16_BITS;
229 break;
230 case SNDRV_PCM_FORMAT_S24_3LE:
231 bits = 24;
232 bitval = SSPA_CTL_24_BITS;
233 break;
234 case SNDRV_PCM_FORMAT_S32_LE:
235 bits = 32;
236 bitval = SSPA_CTL_32_BITS;
237 break;
238 default:
239 return -EINVAL;
240 }
241
242 if (dev->of_node || params_channels(params) == 2)
243 sspa_ctrl |= SSPA_CTL_XPH;
244
245 sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
246 sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);
247
248 sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
249 sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);
250
251 sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
252 sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);
253
254 sspa->sp &= ~SSPA_SP_FWID_MASK;
255 sspa->sp |= SSPA_SP_FWID(bits - 1);
256
257 sspa->sp &= ~SSPA_TXSP_FPER_MASK;
258 sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);
259
260 if (dev->of_node) {
261 clk_set_rate(sspa->clk, params_rate(params) *
262 params_channels(params) * bits);
263 }
264
265 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
266 __raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
267 __raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
268 } else {
269 __raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
270 __raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
271 }
272
273 return 0;
274}
275
276static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
277 struct snd_soc_dai *dai)
278{
279 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
280 int ret = 0;
281
282 switch (cmd) {
283 case SNDRV_PCM_TRIGGER_START:
284 case SNDRV_PCM_TRIGGER_RESUME:
285 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
286
287
288
289
290
291
292 if (!sspa->running_cnt)
293 mmp_sspa_rx_enable(sspa);
294
295 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
296 mmp_sspa_tx_enable(sspa);
297
298 sspa->running_cnt++;
299 break;
300
301 case SNDRV_PCM_TRIGGER_STOP:
302 case SNDRV_PCM_TRIGGER_SUSPEND:
303 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
304 sspa->running_cnt--;
305
306 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
307 mmp_sspa_tx_disable(sspa);
308
309
310 if (!sspa->running_cnt)
311 mmp_sspa_rx_disable(sspa);
312 break;
313
314 default:
315 ret = -EINVAL;
316 }
317
318 return ret;
319}
320
321static int mmp_sspa_probe(struct snd_soc_dai *dai)
322{
323 struct sspa_priv *sspa = dev_get_drvdata(dai->dev);
324
325 snd_soc_dai_init_dma_data(dai,
326 &sspa->playback_dma_data,
327 &sspa->capture_dma_data);
328
329 snd_soc_dai_set_drvdata(dai, sspa);
330 return 0;
331}
332
333#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
334#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
335 SNDRV_PCM_FMTBIT_S16_LE | \
336 SNDRV_PCM_FMTBIT_S24_3LE | \
337 SNDRV_PCM_FMTBIT_S32_LE)
338
339static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
340 .startup = mmp_sspa_startup,
341 .shutdown = mmp_sspa_shutdown,
342 .trigger = mmp_sspa_trigger,
343 .hw_params = mmp_sspa_hw_params,
344 .set_sysclk = mmp_sspa_set_dai_sysclk,
345 .set_pll = mmp_sspa_set_dai_pll,
346 .set_fmt = mmp_sspa_set_dai_fmt,
347};
348
349static struct snd_soc_dai_driver mmp_sspa_dai = {
350 .probe = mmp_sspa_probe,
351 .playback = {
352 .channels_min = 1,
353 .channels_max = 128,
354 .rates = MMP_SSPA_RATES,
355 .formats = MMP_SSPA_FORMATS,
356 },
357 .capture = {
358 .channels_min = 1,
359 .channels_max = 2,
360 .rates = MMP_SSPA_RATES,
361 .formats = MMP_SSPA_FORMATS,
362 },
363 .ops = &mmp_sspa_dai_ops,
364};
365
366#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
367 SNDRV_PCM_INFO_MMAP_VALID | \
368 SNDRV_PCM_INFO_INTERLEAVED | \
369 SNDRV_PCM_INFO_PAUSE | \
370 SNDRV_PCM_INFO_RESUME | \
371 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
372
373static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
374 {
375 .info = MMP_PCM_INFO,
376 .period_bytes_min = 1024,
377 .period_bytes_max = 2048,
378 .periods_min = 2,
379 .periods_max = 32,
380 .buffer_bytes_max = 4096,
381 .fifo_size = 32,
382 },
383 {
384 .info = MMP_PCM_INFO,
385 .period_bytes_min = 1024,
386 .period_bytes_max = 2048,
387 .periods_min = 2,
388 .periods_max = 32,
389 .buffer_bytes_max = 4096,
390 .fifo_size = 32,
391 },
392};
393
394static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
395 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
396 .pcm_hardware = mmp_pcm_hardware,
397 .prealloc_buffer_size = 4096,
398};
399
400static int mmp_pcm_mmap(struct snd_soc_component *component,
401 struct snd_pcm_substream *substream,
402 struct vm_area_struct *vma)
403{
404 vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
405 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
406 return remap_pfn_range(vma, vma->vm_start,
407 substream->dma_buffer.addr >> PAGE_SHIFT,
408 vma->vm_end - vma->vm_start, vma->vm_page_prot);
409}
410
411static int mmp_sspa_open(struct snd_soc_component *component,
412 struct snd_pcm_substream *substream)
413{
414 struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);
415
416 pm_runtime_get_sync(component->dev);
417
418
419 if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
420 (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
421 dev_err(component->dev,
422 "can't change hardware dai format: stream is in use\n");
423 return -EBUSY;
424 }
425
426 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
427 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
428
429 sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
430 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
431 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
432
433
434
435
436
437
438
439
440 __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);
441
442 __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
443 __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);
444
445 return 0;
446}
447
448static int mmp_sspa_close(struct snd_soc_component *component,
449 struct snd_pcm_substream *substream)
450{
451 pm_runtime_put_sync(component->dev);
452 return 0;
453}
454
455static const struct snd_soc_component_driver mmp_sspa_component = {
456 .name = "mmp-sspa",
457 .mmap = mmp_pcm_mmap,
458 .open = mmp_sspa_open,
459 .close = mmp_sspa_close,
460};
461
462static int asoc_mmp_sspa_probe(struct platform_device *pdev)
463{
464 struct sspa_priv *sspa;
465 int ret;
466
467 sspa = devm_kzalloc(&pdev->dev,
468 sizeof(struct sspa_priv), GFP_KERNEL);
469 if (!sspa)
470 return -ENOMEM;
471
472 if (pdev->dev.of_node) {
473 sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
474 if (IS_ERR(sspa->rx_base))
475 return PTR_ERR(sspa->rx_base);
476
477 sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
478 if (IS_ERR(sspa->tx_base))
479 return PTR_ERR(sspa->tx_base);
480
481 sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
482 if (IS_ERR(sspa->clk))
483 return PTR_ERR(sspa->clk);
484
485 sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
486 if (IS_ERR(sspa->audio_clk))
487 return PTR_ERR(sspa->audio_clk);
488 } else {
489 struct resource *res;
490
491 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
492 if (res == NULL)
493 return -ENODEV;
494
495 sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
496 if (!sspa->rx_base)
497 return -ENOMEM;
498
499 sspa->tx_base = devm_ioremap(&pdev->dev,
500 res->start + 0x80, 0x30);
501 if (!sspa->tx_base)
502 return -ENOMEM;
503
504 sspa->clk = devm_clk_get(&pdev->dev, NULL);
505 if (IS_ERR(sspa->clk))
506 return PTR_ERR(sspa->clk);
507
508 sspa->audio_clk = clk_get(NULL, "mmp-audio");
509 if (IS_ERR(sspa->audio_clk))
510 return PTR_ERR(sspa->audio_clk);
511
512 sspa->sysclk = clk_get(NULL, "mmp-sysclk");
513 if (IS_ERR(sspa->sysclk)) {
514 clk_put(sspa->audio_clk);
515 return PTR_ERR(sspa->sysclk);
516 }
517 }
518 platform_set_drvdata(pdev, sspa);
519
520 sspa->playback_dma_data.maxburst = 4;
521 sspa->capture_dma_data.maxburst = 4;
522
523 sspa->capture_dma_data.addr = SSPA_D;
524 sspa->playback_dma_data.addr = 0x80 + SSPA_D;
525
526 if (pdev->dev.of_node) {
527 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
528 &mmp_pcm_config, 0);
529 if (ret)
530 return ret;
531 }
532
533 ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
534 &mmp_sspa_dai, 1);
535 if (ret)
536 return ret;
537
538 pm_runtime_enable(&pdev->dev);
539 clk_prepare_enable(sspa->audio_clk);
540
541 return 0;
542}
543
544static int asoc_mmp_sspa_remove(struct platform_device *pdev)
545{
546 struct sspa_priv *sspa = platform_get_drvdata(pdev);
547
548 clk_disable_unprepare(sspa->audio_clk);
549 pm_runtime_disable(&pdev->dev);
550
551 if (pdev->dev.of_node)
552 return 0;
553
554 clk_put(sspa->audio_clk);
555 clk_put(sspa->sysclk);
556 return 0;
557}
558
559#ifdef CONFIG_OF
560static const struct of_device_id mmp_sspa_of_match[] = {
561 { .compatible = "marvell,mmp-sspa" },
562 {},
563};
564
565MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
566#endif
567
568static struct platform_driver asoc_mmp_sspa_driver = {
569 .driver = {
570 .name = "mmp-sspa-dai",
571 .of_match_table = of_match_ptr(mmp_sspa_of_match),
572 },
573 .probe = asoc_mmp_sspa_probe,
574 .remove = asoc_mmp_sspa_remove,
575};
576
577module_platform_driver(asoc_mmp_sspa_driver);
578
579MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
580MODULE_DESCRIPTION("MMP SSPA SoC Interface");
581MODULE_LICENSE("GPL");
582MODULE_ALIAS("platform:mmp-sspa-dai");
583
