1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * linux/sound/soc/pxa/mmp-sspa.c
4 * Base on pxa2xx-ssp.c
5 *
6 * Copyright (C) 2011 Marvell International Ltd.
7 */
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 * SSPA audio private data
29 */
30 struct 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
mmp_sspa_tx_enable(struct sspa_priv * sspa)45 static 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
mmp_sspa_tx_disable(struct sspa_priv * sspa)55 static 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
mmp_sspa_rx_enable(struct sspa_priv * sspa)65 static 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
mmp_sspa_rx_disable(struct sspa_priv * sspa)74 static 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
mmp_sspa_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)83 static 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
mmp_sspa_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)94 static 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 * Set the SSP ports SYSCLK.
105 */
mmp_sspa_set_dai_sysclk(struct snd_soc_dai * cpu_dai,int clk_id,unsigned int freq,int dir)106 static 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 /* not support yet */
125 return -EINVAL;
126 default:
127 return -EINVAL;
128 }
129
130 return 0;
131 }
132
mmp_sspa_set_dai_pll(struct snd_soc_dai * cpu_dai,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)133 static 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 * Set up the sspa dai format.
164 */
mmp_sspa_set_dai_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)165 static 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 /* reset port settings */
171 sspa->sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
172 sspa->ctrl = 0;
173
174 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
175 case SND_SOC_DAIFMT_BP_FP:
176 sspa->sp |= SSPA_SP_MSL;
177 break;
178 case SND_SOC_DAIFMT_BC_FC:
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 /* Since we are configuring the timings for the format by hand
201 * we have to defer some things until hw_params() where we
202 * know parameters like the sample size.
203 */
204 return 0;
205 }
206
207 /*
208 * Set the SSPA audio DMA parameters and sample size.
209 * Can be called multiple times by oss emulation.
210 */
mmp_sspa_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)211 static 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 sspa_ctrl &= ~SSPA_CTL_XPH;
243 if (dev->of_node || params_channels(params) == 2)
244 sspa_ctrl |= SSPA_CTL_XPH;
245
246 sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
247 sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);
248
249 sspa_ctrl &= ~SSPA_CTL_XWDLEN2_MASK;
250 sspa_ctrl |= SSPA_CTL_XWDLEN2(bitval);
251
252 sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
253 sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);
254
255 sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
256 sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);
257
258 sspa->sp &= ~SSPA_SP_FWID_MASK;
259 sspa->sp |= SSPA_SP_FWID(bits - 1);
260
261 sspa->sp &= ~SSPA_TXSP_FPER_MASK;
262 sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);
263
264 if (dev->of_node) {
265 clk_set_rate(sspa->clk, params_rate(params) *
266 params_channels(params) * bits);
267 }
268
269 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
270 __raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
271 __raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
272 } else {
273 __raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
274 __raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
275 }
276
277 return 0;
278 }
279
mmp_sspa_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)280 static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
281 struct snd_soc_dai *dai)
282 {
283 struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
284 int ret = 0;
285
286 switch (cmd) {
287 case SNDRV_PCM_TRIGGER_START:
288 case SNDRV_PCM_TRIGGER_RESUME:
289 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
290 /*
291 * whatever playback or capture, must enable rx.
292 * this is a hw issue, so need check if rx has been
293 * enabled or not; if has been enabled by another
294 * stream, do not enable again.
295 */
296 if (!sspa->running_cnt)
297 mmp_sspa_rx_enable(sspa);
298
299 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
300 mmp_sspa_tx_enable(sspa);
301
302 sspa->running_cnt++;
303 break;
304
305 case SNDRV_PCM_TRIGGER_STOP:
306 case SNDRV_PCM_TRIGGER_SUSPEND:
307 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
308 sspa->running_cnt--;
309
310 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
311 mmp_sspa_tx_disable(sspa);
312
313 /* have no capture stream, disable rx port */
314 if (!sspa->running_cnt)
315 mmp_sspa_rx_disable(sspa);
316 break;
317
318 default:
319 ret = -EINVAL;
320 }
321
322 return ret;
323 }
324
mmp_sspa_probe(struct snd_soc_dai * dai)325 static int mmp_sspa_probe(struct snd_soc_dai *dai)
326 {
327 struct sspa_priv *sspa = dev_get_drvdata(dai->dev);
328
329 snd_soc_dai_init_dma_data(dai,
330 &sspa->playback_dma_data,
331 &sspa->capture_dma_data);
332
333 return 0;
334 }
335
336 #define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
337 #define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
338 SNDRV_PCM_FMTBIT_S16_LE | \
339 SNDRV_PCM_FMTBIT_S24_3LE | \
340 SNDRV_PCM_FMTBIT_S32_LE)
341
342 static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
343 .startup = mmp_sspa_startup,
344 .shutdown = mmp_sspa_shutdown,
345 .trigger = mmp_sspa_trigger,
346 .hw_params = mmp_sspa_hw_params,
347 .set_sysclk = mmp_sspa_set_dai_sysclk,
348 .set_pll = mmp_sspa_set_dai_pll,
349 .set_fmt = mmp_sspa_set_dai_fmt,
350 };
351
352 static struct snd_soc_dai_driver mmp_sspa_dai = {
353 .probe = mmp_sspa_probe,
354 .playback = {
355 .channels_min = 1,
356 .channels_max = 128,
357 .rates = MMP_SSPA_RATES,
358 .formats = MMP_SSPA_FORMATS,
359 },
360 .capture = {
361 .channels_min = 1,
362 .channels_max = 2,
363 .rates = MMP_SSPA_RATES,
364 .formats = MMP_SSPA_FORMATS,
365 },
366 .ops = &mmp_sspa_dai_ops,
367 };
368
369 #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
370 SNDRV_PCM_INFO_MMAP_VALID | \
371 SNDRV_PCM_INFO_INTERLEAVED | \
372 SNDRV_PCM_INFO_PAUSE | \
373 SNDRV_PCM_INFO_RESUME | \
374 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
375
376 static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
377 {
378 .info = MMP_PCM_INFO,
379 .period_bytes_min = 1024,
380 .period_bytes_max = 2048,
381 .periods_min = 2,
382 .periods_max = 32,
383 .buffer_bytes_max = 4096,
384 .fifo_size = 32,
385 },
386 {
387 .info = MMP_PCM_INFO,
388 .period_bytes_min = 1024,
389 .period_bytes_max = 2048,
390 .periods_min = 2,
391 .periods_max = 32,
392 .buffer_bytes_max = 4096,
393 .fifo_size = 32,
394 },
395 };
396
397 static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
398 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
399 .pcm_hardware = mmp_pcm_hardware,
400 .prealloc_buffer_size = 4096,
401 };
402
mmp_pcm_mmap(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct vm_area_struct * vma)403 static int mmp_pcm_mmap(struct snd_soc_component *component,
404 struct snd_pcm_substream *substream,
405 struct vm_area_struct *vma)
406 {
407 vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
408 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
409 return remap_pfn_range(vma, vma->vm_start,
410 substream->dma_buffer.addr >> PAGE_SHIFT,
411 vma->vm_end - vma->vm_start, vma->vm_page_prot);
412 }
413
mmp_sspa_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)414 static int mmp_sspa_open(struct snd_soc_component *component,
415 struct snd_pcm_substream *substream)
416 {
417 struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);
418
419 pm_runtime_get_sync(component->dev);
420
421 /* we can only change the settings if the port is not in use */
422 if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
423 (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
424 dev_err(component->dev,
425 "can't change hardware dai format: stream is in use\n");
426 return -EBUSY;
427 }
428
429 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
430 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
431
432 sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
433 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
434 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
435
436 /*
437 * FIXME: hw issue, for the tx serial port,
438 * can not config the master/slave mode;
439 * so must clean this bit.
440 * The master/slave mode has been set in the
441 * rx port.
442 */
443 __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);
444
445 __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
446 __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);
447
448 return 0;
449 }
450
mmp_sspa_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)451 static int mmp_sspa_close(struct snd_soc_component *component,
452 struct snd_pcm_substream *substream)
453 {
454 pm_runtime_put_sync(component->dev);
455 return 0;
456 }
457
458 static const struct snd_soc_component_driver mmp_sspa_component = {
459 .name = "mmp-sspa",
460 .mmap = mmp_pcm_mmap,
461 .open = mmp_sspa_open,
462 .close = mmp_sspa_close,
463 .legacy_dai_naming = 1,
464 };
465
asoc_mmp_sspa_probe(struct platform_device * pdev)466 static int asoc_mmp_sspa_probe(struct platform_device *pdev)
467 {
468 struct sspa_priv *sspa;
469 int ret;
470
471 sspa = devm_kzalloc(&pdev->dev,
472 sizeof(struct sspa_priv), GFP_KERNEL);
473 if (!sspa)
474 return -ENOMEM;
475
476 if (pdev->dev.of_node) {
477 sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
478 if (IS_ERR(sspa->rx_base))
479 return PTR_ERR(sspa->rx_base);
480
481 sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
482 if (IS_ERR(sspa->tx_base))
483 return PTR_ERR(sspa->tx_base);
484
485 sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
486 if (IS_ERR(sspa->clk))
487 return PTR_ERR(sspa->clk);
488
489 sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
490 if (IS_ERR(sspa->audio_clk))
491 return PTR_ERR(sspa->audio_clk);
492 } else {
493 struct resource *res;
494
495 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
496 if (res == NULL)
497 return -ENODEV;
498
499 sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
500 if (!sspa->rx_base)
501 return -ENOMEM;
502
503 sspa->tx_base = devm_ioremap(&pdev->dev,
504 res->start + 0x80, 0x30);
505 if (!sspa->tx_base)
506 return -ENOMEM;
507
508 sspa->clk = devm_clk_get(&pdev->dev, NULL);
509 if (IS_ERR(sspa->clk))
510 return PTR_ERR(sspa->clk);
511
512 sspa->audio_clk = clk_get(NULL, "mmp-audio");
513 if (IS_ERR(sspa->audio_clk))
514 return PTR_ERR(sspa->audio_clk);
515
516 sspa->sysclk = clk_get(NULL, "mmp-sysclk");
517 if (IS_ERR(sspa->sysclk)) {
518 clk_put(sspa->audio_clk);
519 return PTR_ERR(sspa->sysclk);
520 }
521 }
522 platform_set_drvdata(pdev, sspa);
523
524 sspa->playback_dma_data.maxburst = 4;
525 sspa->capture_dma_data.maxburst = 4;
526 /* You know, these addresses are actually ignored. */
527 sspa->capture_dma_data.addr = SSPA_D;
528 sspa->playback_dma_data.addr = 0x80 + SSPA_D;
529
530 if (pdev->dev.of_node) {
531 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
532 &mmp_pcm_config, 0);
533 if (ret)
534 return ret;
535 }
536
537 ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
538 &mmp_sspa_dai, 1);
539 if (ret)
540 return ret;
541
542 pm_runtime_enable(&pdev->dev);
543 clk_prepare_enable(sspa->audio_clk);
544
545 return 0;
546 }
547
asoc_mmp_sspa_remove(struct platform_device * pdev)548 static int asoc_mmp_sspa_remove(struct platform_device *pdev)
549 {
550 struct sspa_priv *sspa = platform_get_drvdata(pdev);
551
552 clk_disable_unprepare(sspa->audio_clk);
553 pm_runtime_disable(&pdev->dev);
554
555 if (pdev->dev.of_node)
556 return 0;
557
558 clk_put(sspa->audio_clk);
559 clk_put(sspa->sysclk);
560 return 0;
561 }
562
563 #ifdef CONFIG_OF
564 static const struct of_device_id mmp_sspa_of_match[] = {
565 { .compatible = "marvell,mmp-sspa" },
566 {},
567 };
568
569 MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
570 #endif
571
572 static struct platform_driver asoc_mmp_sspa_driver = {
573 .driver = {
574 .name = "mmp-sspa-dai",
575 .of_match_table = of_match_ptr(mmp_sspa_of_match),
576 },
577 .probe = asoc_mmp_sspa_probe,
578 .remove = asoc_mmp_sspa_remove,
579 };
580
581 module_platform_driver(asoc_mmp_sspa_driver);
582
583 MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
584 MODULE_DESCRIPTION("MMP SSPA SoC Interface");
585 MODULE_LICENSE("GPL");
586 MODULE_ALIAS("platform:mmp-sspa-dai");
587