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fa375d42 ZG |
1 | /* |
2 | * linux/sound/soc/pxa/mmp-sspa.c | |
3 | * Base on pxa2xx-ssp.c | |
4 | * | |
5 | * Copyright (C) 2011 Marvell International Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | * | |
21 | */ | |
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> | |
d65a1458 DM |
30 | #include <linux/dmaengine.h> |
31 | ||
fa375d42 ZG |
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> | |
d65a1458 | 38 | #include <sound/dmaengine_pcm.h> |
fa375d42 ZG |
39 | #include "mmp-sspa.h" |
40 | ||
41 | /* | |
42 | * SSPA audio private data | |
43 | */ | |
44 | struct sspa_priv { | |
45 | struct ssp_device *sspa; | |
d65a1458 | 46 | struct snd_dmaengine_dai_dma_data *dma_params; |
fa375d42 ZG |
47 | struct clk *audio_clk; |
48 | struct clk *sysclk; | |
49 | int dai_fmt; | |
50 | int running_cnt; | |
51 | }; | |
52 | ||
53 | static void mmp_sspa_write_reg(struct ssp_device *sspa, u32 reg, u32 val) | |
54 | { | |
55 | __raw_writel(val, sspa->mmio_base + reg); | |
56 | } | |
57 | ||
58 | static u32 mmp_sspa_read_reg(struct ssp_device *sspa, u32 reg) | |
59 | { | |
60 | return __raw_readl(sspa->mmio_base + reg); | |
61 | } | |
62 | ||
63 | static 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 | ||
73 | static 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 | ||
83 | static 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 | ||
93 | static 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 | ||
103 | static 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 | ||
114 | static 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 | return; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Set the SSP ports SYSCLK. | |
127 | */ | |
128 | static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai, | |
129 | int clk_id, unsigned int freq, int dir) | |
130 | { | |
131 | struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); | |
132 | int ret = 0; | |
133 | ||
134 | switch (clk_id) { | |
135 | case MMP_SSPA_CLK_AUDIO: | |
136 | ret = clk_set_rate(priv->audio_clk, freq); | |
137 | if (ret) | |
138 | return ret; | |
139 | break; | |
140 | case MMP_SSPA_CLK_PLL: | |
141 | case MMP_SSPA_CLK_VCXO: | |
142 | /* not support yet */ | |
143 | return -EINVAL; | |
144 | default: | |
145 | return -EINVAL; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id, | |
152 | int source, unsigned int freq_in, | |
153 | unsigned int freq_out) | |
154 | { | |
155 | struct sspa_priv *priv = snd_soc_dai_get_drvdata(cpu_dai); | |
156 | int ret = 0; | |
157 | ||
158 | switch (pll_id) { | |
159 | case MMP_SYSCLK: | |
160 | ret = clk_set_rate(priv->sysclk, freq_out); | |
161 | if (ret) | |
162 | return ret; | |
163 | break; | |
164 | case MMP_SSPA_CLK: | |
165 | ret = clk_set_rate(priv->sspa->clk, freq_out); | |
166 | if (ret) | |
167 | return ret; | |
168 | break; | |
169 | default: | |
170 | return -ENODEV; | |
171 | } | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Set up the sspa dai format. The sspa port must be inactive | |
178 | * before calling this function as the physical | |
179 | * interface format is changed. | |
180 | */ | |
181 | static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai, | |
182 | unsigned int fmt) | |
183 | { | |
184 | struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(cpu_dai); | |
185 | struct ssp_device *sspa = sspa_priv->sspa; | |
186 | u32 sspa_sp, sspa_ctrl; | |
187 | ||
188 | /* check if we need to change anything at all */ | |
189 | if (sspa_priv->dai_fmt == fmt) | |
190 | return 0; | |
191 | ||
192 | /* we can only change the settings if the port is not in use */ | |
193 | if ((mmp_sspa_read_reg(sspa, SSPA_TXSP) & SSPA_SP_S_EN) || | |
194 | (mmp_sspa_read_reg(sspa, SSPA_RXSP) & SSPA_SP_S_EN)) { | |
195 | dev_err(&sspa->pdev->dev, | |
196 | "can't change hardware dai format: stream is in use\n"); | |
197 | return -EINVAL; | |
198 | } | |
199 | ||
200 | /* reset port settings */ | |
201 | sspa_sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH; | |
202 | sspa_ctrl = 0; | |
203 | ||
204 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
205 | case SND_SOC_DAIFMT_CBS_CFS: | |
206 | sspa_sp |= SSPA_SP_MSL; | |
207 | break; | |
208 | case SND_SOC_DAIFMT_CBM_CFM: | |
209 | break; | |
210 | default: | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
214 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
215 | case SND_SOC_DAIFMT_NB_NF: | |
216 | sspa_sp |= SSPA_SP_FSP; | |
217 | break; | |
218 | default: | |
219 | return -EINVAL; | |
220 | } | |
221 | ||
222 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
223 | case SND_SOC_DAIFMT_I2S: | |
224 | sspa_sp |= SSPA_TXSP_FPER(63); | |
225 | sspa_sp |= SSPA_SP_FWID(31); | |
226 | sspa_ctrl |= SSPA_CTL_XDATDLY(1); | |
227 | break; | |
228 | default: | |
229 | return -EINVAL; | |
230 | } | |
231 | ||
232 | mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp); | |
233 | mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp); | |
234 | ||
235 | sspa_sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH); | |
236 | mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp); | |
237 | mmp_sspa_write_reg(sspa, SSPA_RXSP, sspa_sp); | |
238 | ||
239 | /* | |
240 | * FIXME: hw issue, for the tx serial port, | |
241 | * can not config the master/slave mode; | |
242 | * so must clean this bit. | |
243 | * The master/slave mode has been set in the | |
244 | * rx port. | |
245 | */ | |
246 | sspa_sp &= ~SSPA_SP_MSL; | |
247 | mmp_sspa_write_reg(sspa, SSPA_TXSP, sspa_sp); | |
248 | ||
249 | mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl); | |
250 | mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl); | |
251 | ||
252 | /* Since we are configuring the timings for the format by hand | |
253 | * we have to defer some things until hw_params() where we | |
254 | * know parameters like the sample size. | |
255 | */ | |
256 | sspa_priv->dai_fmt = fmt; | |
257 | return 0; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Set the SSPA audio DMA parameters and sample size. | |
262 | * Can be called multiple times by oss emulation. | |
263 | */ | |
264 | static int mmp_sspa_hw_params(struct snd_pcm_substream *substream, | |
265 | struct snd_pcm_hw_params *params, | |
266 | struct snd_soc_dai *dai) | |
267 | { | |
268 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
269 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
270 | struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai); | |
271 | struct ssp_device *sspa = sspa_priv->sspa; | |
d65a1458 | 272 | struct snd_dmaengine_dai_dma_data *dma_params; |
fa375d42 ZG |
273 | u32 sspa_ctrl; |
274 | ||
275 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
276 | sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_TXCTL); | |
277 | else | |
278 | sspa_ctrl = mmp_sspa_read_reg(sspa, SSPA_RXCTL); | |
279 | ||
280 | sspa_ctrl &= ~SSPA_CTL_XFRLEN1_MASK; | |
281 | sspa_ctrl |= SSPA_CTL_XFRLEN1(params_channels(params) - 1); | |
282 | sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK; | |
283 | sspa_ctrl |= SSPA_CTL_XWDLEN1(SSPA_CTL_32_BITS); | |
284 | sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK; | |
285 | ||
286 | switch (params_format(params)) { | |
287 | case SNDRV_PCM_FORMAT_S8: | |
288 | sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_8_BITS); | |
289 | break; | |
290 | case SNDRV_PCM_FORMAT_S16_LE: | |
291 | sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_16_BITS); | |
292 | break; | |
293 | case SNDRV_PCM_FORMAT_S20_3LE: | |
294 | sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_20_BITS); | |
295 | break; | |
296 | case SNDRV_PCM_FORMAT_S24_3LE: | |
297 | sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_24_BITS); | |
298 | break; | |
299 | case SNDRV_PCM_FORMAT_S32_LE: | |
300 | sspa_ctrl |= SSPA_CTL_XSSZ1(SSPA_CTL_32_BITS); | |
301 | break; | |
302 | default: | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
307 | mmp_sspa_write_reg(sspa, SSPA_TXCTL, sspa_ctrl); | |
308 | mmp_sspa_write_reg(sspa, SSPA_TXFIFO_LL, 0x1); | |
309 | } else { | |
310 | mmp_sspa_write_reg(sspa, SSPA_RXCTL, sspa_ctrl); | |
311 | mmp_sspa_write_reg(sspa, SSPA_RXFIFO_UL, 0x0); | |
312 | } | |
313 | ||
314 | dma_params = &sspa_priv->dma_params[substream->stream]; | |
d65a1458 | 315 | dma_params->addr = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? |
fa375d42 ZG |
316 | (sspa->phys_base + SSPA_TXD) : |
317 | (sspa->phys_base + SSPA_RXD); | |
318 | snd_soc_dai_set_dma_data(cpu_dai, substream, dma_params); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd, | |
323 | struct snd_soc_dai *dai) | |
324 | { | |
325 | struct sspa_priv *sspa_priv = snd_soc_dai_get_drvdata(dai); | |
326 | struct ssp_device *sspa = sspa_priv->sspa; | |
327 | int ret = 0; | |
328 | ||
329 | switch (cmd) { | |
330 | case SNDRV_PCM_TRIGGER_START: | |
331 | case SNDRV_PCM_TRIGGER_RESUME: | |
332 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
333 | /* | |
334 | * whatever playback or capture, must enable rx. | |
335 | * this is a hw issue, so need check if rx has been | |
336 | * enabled or not; if has been enabled by another | |
337 | * stream, do not enable again. | |
338 | */ | |
339 | if (!sspa_priv->running_cnt) | |
340 | mmp_sspa_rx_enable(sspa); | |
341 | ||
342 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
343 | mmp_sspa_tx_enable(sspa); | |
344 | ||
345 | sspa_priv->running_cnt++; | |
346 | break; | |
347 | ||
348 | case SNDRV_PCM_TRIGGER_STOP: | |
349 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
350 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
351 | sspa_priv->running_cnt--; | |
352 | ||
353 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
354 | mmp_sspa_tx_disable(sspa); | |
355 | ||
356 | /* have no capture stream, disable rx port */ | |
357 | if (!sspa_priv->running_cnt) | |
358 | mmp_sspa_rx_disable(sspa); | |
359 | break; | |
360 | ||
361 | default: | |
362 | ret = -EINVAL; | |
363 | } | |
364 | ||
365 | return ret; | |
366 | } | |
367 | ||
368 | static int mmp_sspa_probe(struct snd_soc_dai *dai) | |
369 | { | |
370 | struct sspa_priv *priv = dev_get_drvdata(dai->dev); | |
371 | ||
372 | snd_soc_dai_set_drvdata(dai, priv); | |
373 | return 0; | |
374 | ||
375 | } | |
376 | ||
377 | #define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000 | |
378 | #define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ | |
379 | SNDRV_PCM_FMTBIT_S16_LE | \ | |
380 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
381 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
382 | SNDRV_PCM_FMTBIT_S32_LE) | |
383 | ||
384 | static struct snd_soc_dai_ops mmp_sspa_dai_ops = { | |
385 | .startup = mmp_sspa_startup, | |
386 | .shutdown = mmp_sspa_shutdown, | |
387 | .trigger = mmp_sspa_trigger, | |
388 | .hw_params = mmp_sspa_hw_params, | |
389 | .set_sysclk = mmp_sspa_set_dai_sysclk, | |
390 | .set_pll = mmp_sspa_set_dai_pll, | |
391 | .set_fmt = mmp_sspa_set_dai_fmt, | |
392 | }; | |
393 | ||
5d9ff402 | 394 | static struct snd_soc_dai_driver mmp_sspa_dai = { |
fa375d42 ZG |
395 | .probe = mmp_sspa_probe, |
396 | .playback = { | |
397 | .channels_min = 1, | |
398 | .channels_max = 128, | |
399 | .rates = MMP_SSPA_RATES, | |
400 | .formats = MMP_SSPA_FORMATS, | |
401 | }, | |
402 | .capture = { | |
403 | .channels_min = 1, | |
404 | .channels_max = 2, | |
405 | .rates = MMP_SSPA_RATES, | |
406 | .formats = MMP_SSPA_FORMATS, | |
407 | }, | |
408 | .ops = &mmp_sspa_dai_ops, | |
409 | }; | |
410 | ||
425f3708 KM |
411 | static const struct snd_soc_component_driver mmp_sspa_component = { |
412 | .name = "mmp-sspa", | |
413 | }; | |
414 | ||
570f6fe1 | 415 | static int asoc_mmp_sspa_probe(struct platform_device *pdev) |
fa375d42 ZG |
416 | { |
417 | struct sspa_priv *priv; | |
418 | struct resource *res; | |
419 | ||
420 | priv = devm_kzalloc(&pdev->dev, | |
421 | sizeof(struct sspa_priv), GFP_KERNEL); | |
422 | if (!priv) | |
423 | return -ENOMEM; | |
424 | ||
425 | priv->sspa = devm_kzalloc(&pdev->dev, | |
426 | sizeof(struct ssp_device), GFP_KERNEL); | |
427 | if (priv->sspa == NULL) | |
428 | return -ENOMEM; | |
429 | ||
430 | priv->dma_params = devm_kzalloc(&pdev->dev, | |
d65a1458 DM |
431 | 2 * sizeof(struct snd_dmaengine_dai_dma_data), |
432 | GFP_KERNEL); | |
fa375d42 ZG |
433 | if (priv->dma_params == NULL) |
434 | return -ENOMEM; | |
435 | ||
436 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
b25b5aa0 TR |
437 | priv->sspa->mmio_base = devm_ioremap_resource(&pdev->dev, res); |
438 | if (IS_ERR(priv->sspa->mmio_base)) | |
439 | return PTR_ERR(priv->sspa->mmio_base); | |
fa375d42 ZG |
440 | |
441 | priv->sspa->clk = devm_clk_get(&pdev->dev, NULL); | |
442 | if (IS_ERR(priv->sspa->clk)) | |
443 | return PTR_ERR(priv->sspa->clk); | |
444 | ||
445 | priv->audio_clk = clk_get(NULL, "mmp-audio"); | |
446 | if (IS_ERR(priv->audio_clk)) | |
447 | return PTR_ERR(priv->audio_clk); | |
448 | ||
449 | priv->sysclk = clk_get(NULL, "mmp-sysclk"); | |
450 | if (IS_ERR(priv->sysclk)) { | |
451 | clk_put(priv->audio_clk); | |
452 | return PTR_ERR(priv->sysclk); | |
453 | } | |
454 | clk_enable(priv->audio_clk); | |
455 | priv->dai_fmt = (unsigned int) -1; | |
456 | platform_set_drvdata(pdev, priv); | |
457 | ||
9ff50721 SK |
458 | return devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component, |
459 | &mmp_sspa_dai, 1); | |
fa375d42 ZG |
460 | } |
461 | ||
570f6fe1 | 462 | static int asoc_mmp_sspa_remove(struct platform_device *pdev) |
fa375d42 ZG |
463 | { |
464 | struct sspa_priv *priv = platform_get_drvdata(pdev); | |
465 | ||
466 | clk_disable(priv->audio_clk); | |
467 | clk_put(priv->audio_clk); | |
468 | clk_put(priv->sysclk); | |
fa375d42 ZG |
469 | return 0; |
470 | } | |
471 | ||
472 | static struct platform_driver asoc_mmp_sspa_driver = { | |
473 | .driver = { | |
474 | .name = "mmp-sspa-dai", | |
fa375d42 ZG |
475 | }, |
476 | .probe = asoc_mmp_sspa_probe, | |
570f6fe1 | 477 | .remove = asoc_mmp_sspa_remove, |
fa375d42 ZG |
478 | }; |
479 | ||
480 | module_platform_driver(asoc_mmp_sspa_driver); | |
481 | ||
482 | MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); | |
483 | MODULE_DESCRIPTION("MMP SSPA SoC Interface"); | |
484 | MODULE_LICENSE("GPL"); | |
e5b7d71a | 485 | MODULE_ALIAS("platform:mmp-sspa-dai"); |