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14412acd BD |
1 | /* sound/soc/s3c24xx/s3c24xx_simtec.c |
2 | * | |
3 | * Copyright 2009 Simtec Electronics | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/moduleparam.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/gpio.h> | |
14 | #include <linux/clk.h> | |
15 | #include <linux/i2c.h> | |
16 | ||
17 | #include <sound/core.h> | |
18 | #include <sound/pcm.h> | |
19 | #include <sound/soc.h> | |
20 | #include <sound/soc-dapm.h> | |
21 | ||
22 | #include <plat/audio-simtec.h> | |
23 | ||
24 | #include "s3c24xx-pcm.h" | |
25 | #include "s3c24xx-i2s.h" | |
26 | #include "s3c24xx_simtec.h" | |
27 | ||
28 | static struct s3c24xx_audio_simtec_pdata *pdata; | |
29 | static struct clk *xtal_clk; | |
30 | ||
31 | static int spk_gain; | |
32 | static int spk_unmute; | |
33 | ||
34 | /** | |
35 | * speaker_gain_get - read the speaker gain setting. | |
36 | * @kcontrol: The control for the speaker gain. | |
37 | * @ucontrol: The value that needs to be updated. | |
38 | * | |
39 | * Read the value for the AMP gain control. | |
40 | */ | |
41 | static int speaker_gain_get(struct snd_kcontrol *kcontrol, | |
42 | struct snd_ctl_elem_value *ucontrol) | |
43 | { | |
44 | ucontrol->value.integer.value[0] = spk_gain; | |
45 | return 0; | |
46 | } | |
47 | ||
48 | /** | |
49 | * speaker_gain_set - set the value of the speaker amp gain | |
50 | * @value: The value to write. | |
51 | */ | |
52 | static void speaker_gain_set(int value) | |
53 | { | |
54 | gpio_set_value_cansleep(pdata->amp_gain[0], value & 1); | |
55 | gpio_set_value_cansleep(pdata->amp_gain[1], value >> 1); | |
56 | } | |
57 | ||
58 | /** | |
59 | * speaker_gain_put - set the speaker gain setting. | |
60 | * @kcontrol: The control for the speaker gain. | |
61 | * @ucontrol: The value that needs to be set. | |
62 | * | |
63 | * Set the value of the speaker gain from the specified | |
64 | * @ucontrol setting. | |
65 | * | |
66 | * Note, if the speaker amp is muted, then we do not set a gain value | |
67 | * as at-least one of the ICs that is fitted will try and power up even | |
68 | * if the main control is set to off. | |
69 | */ | |
70 | static int speaker_gain_put(struct snd_kcontrol *kcontrol, | |
71 | struct snd_ctl_elem_value *ucontrol) | |
72 | { | |
73 | int value = ucontrol->value.integer.value[0]; | |
74 | ||
75 | spk_gain = value; | |
76 | ||
77 | if (!spk_unmute) | |
78 | speaker_gain_set(value); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static const struct snd_kcontrol_new amp_gain_controls[] = { | |
84 | SOC_SINGLE_EXT("Speaker Gain", 0, 0, 3, 0, | |
85 | speaker_gain_get, speaker_gain_put), | |
86 | }; | |
87 | ||
88 | /** | |
89 | * spk_unmute_state - set the unmute state of the speaker | |
90 | * @to: zero to unmute, non-zero to ununmute. | |
91 | */ | |
92 | static void spk_unmute_state(int to) | |
93 | { | |
94 | pr_debug("%s: to=%d\n", __func__, to); | |
95 | ||
96 | spk_unmute = to; | |
97 | gpio_set_value(pdata->amp_gpio, to); | |
98 | ||
99 | /* if we're umuting, also re-set the gain */ | |
100 | if (to && pdata->amp_gain[0] > 0) | |
101 | speaker_gain_set(spk_gain); | |
102 | } | |
103 | ||
104 | /** | |
105 | * speaker_unmute_get - read the speaker unmute setting. | |
106 | * @kcontrol: The control for the speaker gain. | |
107 | * @ucontrol: The value that needs to be updated. | |
108 | * | |
109 | * Read the value for the AMP gain control. | |
110 | */ | |
111 | static int speaker_unmute_get(struct snd_kcontrol *kcontrol, | |
112 | struct snd_ctl_elem_value *ucontrol) | |
113 | { | |
114 | ucontrol->value.integer.value[0] = spk_unmute; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | /** | |
119 | * speaker_unmute_put - set the speaker unmute setting. | |
120 | * @kcontrol: The control for the speaker gain. | |
121 | * @ucontrol: The value that needs to be set. | |
122 | * | |
123 | * Set the value of the speaker gain from the specified | |
124 | * @ucontrol setting. | |
125 | */ | |
126 | static int speaker_unmute_put(struct snd_kcontrol *kcontrol, | |
127 | struct snd_ctl_elem_value *ucontrol) | |
128 | { | |
129 | spk_unmute_state(ucontrol->value.integer.value[0]); | |
130 | return 0; | |
131 | } | |
132 | ||
133 | /* This is added as a manual control as the speaker amps create clicks | |
134 | * when their power state is changed, which are far more noticeable than | |
135 | * anything produced by the CODEC itself. | |
136 | */ | |
137 | static const struct snd_kcontrol_new amp_unmute_controls[] = { | |
138 | SOC_SINGLE_EXT("Speaker Switch", 0, 0, 1, 0, | |
139 | speaker_unmute_get, speaker_unmute_put), | |
140 | }; | |
141 | ||
142 | void simtec_audio_init(struct snd_soc_codec *codec) | |
143 | { | |
144 | if (pdata->amp_gpio > 0) { | |
145 | pr_debug("%s: adding amp routes\n", __func__); | |
146 | ||
147 | snd_soc_add_controls(codec, amp_unmute_controls, | |
148 | ARRAY_SIZE(amp_unmute_controls)); | |
149 | } | |
150 | ||
151 | if (pdata->amp_gain[0] > 0) { | |
152 | pr_debug("%s: adding amp controls\n", __func__); | |
153 | snd_soc_add_controls(codec, amp_gain_controls, | |
154 | ARRAY_SIZE(amp_gain_controls)); | |
155 | } | |
156 | } | |
157 | EXPORT_SYMBOL_GPL(simtec_audio_init); | |
158 | ||
159 | #define CODEC_CLOCK 12000000 | |
160 | ||
161 | /** | |
162 | * simtec_hw_params - update hardware parameters | |
163 | * @substream: The audio substream instance. | |
164 | * @params: The parameters requested. | |
165 | * | |
166 | * Update the codec data routing and configuration settings | |
167 | * from the supplied data. | |
168 | */ | |
169 | static int simtec_hw_params(struct snd_pcm_substream *substream, | |
170 | struct snd_pcm_hw_params *params) | |
171 | { | |
172 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
173 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
174 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
175 | int ret; | |
176 | ||
177 | /* Set the CODEC as the bus clock master, I2S */ | |
178 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
179 | SND_SOC_DAIFMT_NB_NF | | |
180 | SND_SOC_DAIFMT_CBM_CFM); | |
181 | if (ret) { | |
182 | pr_err("%s: failed set cpu dai format\n", __func__); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | /* Set the CODEC as the bus clock master */ | |
187 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
188 | SND_SOC_DAIFMT_NB_NF | | |
189 | SND_SOC_DAIFMT_CBM_CFM); | |
190 | if (ret) { | |
191 | pr_err("%s: failed set codec dai format\n", __func__); | |
192 | return ret; | |
193 | } | |
194 | ||
195 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, | |
196 | CODEC_CLOCK, SND_SOC_CLOCK_IN); | |
197 | if (ret) { | |
198 | pr_err( "%s: failed setting codec sysclk\n", __func__); | |
199 | return ret; | |
200 | } | |
201 | ||
202 | if (pdata->use_mpllin) { | |
203 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_MPLL, | |
204 | 0, SND_SOC_CLOCK_OUT); | |
205 | ||
206 | if (ret) { | |
207 | pr_err("%s: failed to set MPLLin as clksrc\n", | |
208 | __func__); | |
209 | return ret; | |
210 | } | |
211 | } | |
212 | ||
213 | if (pdata->output_cdclk) { | |
214 | int cdclk_scale; | |
215 | ||
216 | cdclk_scale = clk_get_rate(xtal_clk) / CODEC_CLOCK; | |
217 | cdclk_scale--; | |
218 | ||
219 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER, | |
220 | cdclk_scale); | |
221 | } | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static int simtec_call_startup(struct s3c24xx_audio_simtec_pdata *pd) | |
227 | { | |
228 | /* call any board supplied startup code, this currently only | |
229 | * covers the bast/vr1000 which have a CPLD in the way of the | |
230 | * LRCLK */ | |
231 | if (pd->startup) | |
232 | pd->startup(); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static struct snd_soc_ops simtec_snd_ops = { | |
238 | .hw_params = simtec_hw_params, | |
239 | }; | |
240 | ||
241 | /** | |
242 | * attach_gpio_amp - get and configure the necessary gpios | |
243 | * @dev: The device we're probing. | |
244 | * @pd: The platform data supplied by the board. | |
245 | * | |
246 | * If there is a GPIO based amplifier attached to the board, claim | |
247 | * the necessary GPIO lines for it, and set default values. | |
248 | */ | |
249 | static int attach_gpio_amp(struct device *dev, | |
250 | struct s3c24xx_audio_simtec_pdata *pd) | |
251 | { | |
252 | int ret; | |
253 | ||
254 | /* attach gpio amp gain (if any) */ | |
255 | if (pdata->amp_gain[0] > 0) { | |
256 | ret = gpio_request(pd->amp_gain[0], "gpio-amp-gain0"); | |
257 | if (ret) { | |
258 | dev_err(dev, "cannot get amp gpio gain0\n"); | |
259 | return ret; | |
260 | } | |
261 | ||
262 | ret = gpio_request(pd->amp_gain[1], "gpio-amp-gain1"); | |
263 | if (ret) { | |
264 | dev_err(dev, "cannot get amp gpio gain1\n"); | |
265 | gpio_free(pdata->amp_gain[0]); | |
266 | return ret; | |
267 | } | |
268 | ||
269 | gpio_direction_output(pd->amp_gain[0], 0); | |
270 | gpio_direction_output(pd->amp_gain[1], 0); | |
271 | } | |
272 | ||
af901ca1 | 273 | /* note, currently we assume GPA0 isn't valid amp */ |
14412acd BD |
274 | if (pdata->amp_gpio > 0) { |
275 | ret = gpio_request(pd->amp_gpio, "gpio-amp"); | |
276 | if (ret) { | |
277 | dev_err(dev, "cannot get amp gpio %d (%d)\n", | |
278 | pd->amp_gpio, ret); | |
279 | goto err_amp; | |
280 | } | |
281 | ||
282 | /* set the amp off at startup */ | |
283 | spk_unmute_state(0); | |
284 | } | |
285 | ||
286 | return 0; | |
287 | ||
288 | err_amp: | |
289 | if (pd->amp_gain[0] > 0) { | |
290 | gpio_free(pd->amp_gain[0]); | |
291 | gpio_free(pd->amp_gain[1]); | |
292 | } | |
293 | ||
294 | return ret; | |
295 | } | |
296 | ||
297 | static void detach_gpio_amp(struct s3c24xx_audio_simtec_pdata *pd) | |
298 | { | |
299 | if (pd->amp_gain[0] > 0) { | |
300 | gpio_free(pd->amp_gain[0]); | |
301 | gpio_free(pd->amp_gain[1]); | |
302 | } | |
303 | ||
304 | if (pd->amp_gpio > 0) | |
305 | gpio_free(pd->amp_gpio); | |
306 | } | |
307 | ||
308 | #ifdef CONFIG_PM | |
309 | int simtec_audio_resume(struct device *dev) | |
310 | { | |
311 | simtec_call_startup(pdata); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | struct dev_pm_ops simtec_audio_pmops = { | |
316 | .resume = simtec_audio_resume, | |
317 | }; | |
318 | EXPORT_SYMBOL_GPL(simtec_audio_pmops); | |
319 | #endif | |
320 | ||
321 | int __devinit simtec_audio_core_probe(struct platform_device *pdev, | |
322 | struct snd_soc_device *socdev) | |
323 | { | |
324 | struct platform_device *snd_dev; | |
325 | int ret; | |
326 | ||
327 | socdev->card->dai_link->ops = &simtec_snd_ops; | |
328 | ||
329 | pdata = pdev->dev.platform_data; | |
330 | if (!pdata) { | |
331 | dev_err(&pdev->dev, "no platform data supplied\n"); | |
332 | return -EINVAL; | |
333 | } | |
334 | ||
335 | simtec_call_startup(pdata); | |
336 | ||
337 | xtal_clk = clk_get(&pdev->dev, "xtal"); | |
338 | if (IS_ERR(xtal_clk)) { | |
339 | dev_err(&pdev->dev, "could not get clkout0\n"); | |
340 | return -EINVAL; | |
341 | } | |
342 | ||
343 | dev_info(&pdev->dev, "xtal rate is %ld\n", clk_get_rate(xtal_clk)); | |
344 | ||
345 | ret = attach_gpio_amp(&pdev->dev, pdata); | |
346 | if (ret) | |
347 | goto err_clk; | |
348 | ||
349 | snd_dev = platform_device_alloc("soc-audio", -1); | |
350 | if (!snd_dev) { | |
351 | dev_err(&pdev->dev, "failed to alloc soc-audio devicec\n"); | |
352 | ret = -ENOMEM; | |
353 | goto err_gpio; | |
354 | } | |
355 | ||
356 | platform_set_drvdata(snd_dev, socdev); | |
357 | socdev->dev = &snd_dev->dev; | |
358 | ||
359 | ret = platform_device_add(snd_dev); | |
360 | if (ret) { | |
361 | dev_err(&pdev->dev, "failed to add soc-audio dev\n"); | |
362 | goto err_pdev; | |
363 | } | |
364 | ||
365 | platform_set_drvdata(pdev, snd_dev); | |
366 | return 0; | |
367 | ||
368 | err_pdev: | |
369 | platform_device_put(snd_dev); | |
370 | ||
371 | err_gpio: | |
372 | detach_gpio_amp(pdata); | |
373 | ||
374 | err_clk: | |
375 | clk_put(xtal_clk); | |
376 | return ret; | |
377 | } | |
378 | EXPORT_SYMBOL_GPL(simtec_audio_core_probe); | |
379 | ||
380 | int __devexit simtec_audio_remove(struct platform_device *pdev) | |
381 | { | |
382 | struct platform_device *snd_dev = platform_get_drvdata(pdev); | |
383 | ||
384 | platform_device_unregister(snd_dev); | |
385 | ||
386 | detach_gpio_amp(pdata); | |
387 | clk_put(xtal_clk); | |
388 | return 0; | |
389 | } | |
390 | EXPORT_SYMBOL_GPL(simtec_audio_remove); | |
391 | ||
392 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
393 | MODULE_DESCRIPTION("ALSA SoC Simtec Audio common support"); | |
394 | MODULE_LICENSE("GPL"); |