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