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5033f43c | 1 | /* sound/soc/samsung/s3c24xx_simtec.c |
14412acd BD |
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 | ||
14412acd BD |
10 | #include <linux/gpio.h> |
11 | #include <linux/clk.h> | |
da155d5b | 12 | #include <linux/module.h> |
14412acd | 13 | |
14412acd | 14 | #include <sound/soc.h> |
14412acd BD |
15 | |
16 | #include <plat/audio-simtec.h> | |
17 | ||
14412acd BD |
18 | #include "s3c24xx-i2s.h" |
19 | #include "s3c24xx_simtec.h" | |
20 | ||
21 | static struct s3c24xx_audio_simtec_pdata *pdata; | |
22 | static struct clk *xtal_clk; | |
23 | ||
24 | static int spk_gain; | |
25 | static int spk_unmute; | |
26 | ||
27 | /** | |
28 | * speaker_gain_get - read the speaker gain setting. | |
29 | * @kcontrol: The control for the speaker gain. | |
30 | * @ucontrol: The value that needs to be updated. | |
31 | * | |
32 | * Read the value for the AMP gain control. | |
33 | */ | |
34 | static int speaker_gain_get(struct snd_kcontrol *kcontrol, | |
35 | struct snd_ctl_elem_value *ucontrol) | |
36 | { | |
37 | ucontrol->value.integer.value[0] = spk_gain; | |
38 | return 0; | |
39 | } | |
40 | ||
41 | /** | |
42 | * speaker_gain_set - set the value of the speaker amp gain | |
43 | * @value: The value to write. | |
44 | */ | |
45 | static void speaker_gain_set(int value) | |
46 | { | |
47 | gpio_set_value_cansleep(pdata->amp_gain[0], value & 1); | |
48 | gpio_set_value_cansleep(pdata->amp_gain[1], value >> 1); | |
49 | } | |
50 | ||
51 | /** | |
52 | * speaker_gain_put - set the speaker gain setting. | |
53 | * @kcontrol: The control for the speaker gain. | |
54 | * @ucontrol: The value that needs to be set. | |
55 | * | |
56 | * Set the value of the speaker gain from the specified | |
57 | * @ucontrol setting. | |
58 | * | |
59 | * Note, if the speaker amp is muted, then we do not set a gain value | |
60 | * as at-least one of the ICs that is fitted will try and power up even | |
61 | * if the main control is set to off. | |
62 | */ | |
63 | static int speaker_gain_put(struct snd_kcontrol *kcontrol, | |
64 | struct snd_ctl_elem_value *ucontrol) | |
65 | { | |
66 | int value = ucontrol->value.integer.value[0]; | |
67 | ||
68 | spk_gain = value; | |
69 | ||
70 | if (!spk_unmute) | |
71 | speaker_gain_set(value); | |
72 | ||
73 | return 0; | |
74 | } | |
75 | ||
76 | static const struct snd_kcontrol_new amp_gain_controls[] = { | |
77 | SOC_SINGLE_EXT("Speaker Gain", 0, 0, 3, 0, | |
78 | speaker_gain_get, speaker_gain_put), | |
79 | }; | |
80 | ||
81 | /** | |
82 | * spk_unmute_state - set the unmute state of the speaker | |
83 | * @to: zero to unmute, non-zero to ununmute. | |
84 | */ | |
85 | static void spk_unmute_state(int to) | |
86 | { | |
87 | pr_debug("%s: to=%d\n", __func__, to); | |
88 | ||
89 | spk_unmute = to; | |
90 | gpio_set_value(pdata->amp_gpio, to); | |
91 | ||
92 | /* if we're umuting, also re-set the gain */ | |
93 | if (to && pdata->amp_gain[0] > 0) | |
94 | speaker_gain_set(spk_gain); | |
95 | } | |
96 | ||
97 | /** | |
98 | * speaker_unmute_get - read the speaker unmute setting. | |
99 | * @kcontrol: The control for the speaker gain. | |
100 | * @ucontrol: The value that needs to be updated. | |
101 | * | |
102 | * Read the value for the AMP gain control. | |
103 | */ | |
104 | static int speaker_unmute_get(struct snd_kcontrol *kcontrol, | |
105 | struct snd_ctl_elem_value *ucontrol) | |
106 | { | |
107 | ucontrol->value.integer.value[0] = spk_unmute; | |
108 | return 0; | |
109 | } | |
110 | ||
111 | /** | |
112 | * speaker_unmute_put - set the speaker unmute setting. | |
113 | * @kcontrol: The control for the speaker gain. | |
114 | * @ucontrol: The value that needs to be set. | |
115 | * | |
116 | * Set the value of the speaker gain from the specified | |
117 | * @ucontrol setting. | |
118 | */ | |
119 | static int speaker_unmute_put(struct snd_kcontrol *kcontrol, | |
120 | struct snd_ctl_elem_value *ucontrol) | |
121 | { | |
122 | spk_unmute_state(ucontrol->value.integer.value[0]); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | /* This is added as a manual control as the speaker amps create clicks | |
127 | * when their power state is changed, which are far more noticeable than | |
128 | * anything produced by the CODEC itself. | |
129 | */ | |
130 | static const struct snd_kcontrol_new amp_unmute_controls[] = { | |
131 | SOC_SINGLE_EXT("Speaker Switch", 0, 0, 1, 0, | |
132 | speaker_unmute_get, speaker_unmute_put), | |
133 | }; | |
134 | ||
f0fba2ad | 135 | void simtec_audio_init(struct snd_soc_pcm_runtime *rtd) |
14412acd | 136 | { |
022658be | 137 | struct snd_soc_card *card = rtd->card; |
f0fba2ad | 138 | |
14412acd BD |
139 | if (pdata->amp_gpio > 0) { |
140 | pr_debug("%s: adding amp routes\n", __func__); | |
141 | ||
022658be | 142 | snd_soc_add_card_controls(card, amp_unmute_controls, |
14412acd BD |
143 | ARRAY_SIZE(amp_unmute_controls)); |
144 | } | |
145 | ||
146 | if (pdata->amp_gain[0] > 0) { | |
147 | pr_debug("%s: adding amp controls\n", __func__); | |
022658be | 148 | snd_soc_add_card_controls(card, amp_gain_controls, |
14412acd BD |
149 | ARRAY_SIZE(amp_gain_controls)); |
150 | } | |
151 | } | |
152 | EXPORT_SYMBOL_GPL(simtec_audio_init); | |
153 | ||
154 | #define CODEC_CLOCK 12000000 | |
155 | ||
156 | /** | |
157 | * simtec_hw_params - update hardware parameters | |
158 | * @substream: The audio substream instance. | |
159 | * @params: The parameters requested. | |
160 | * | |
161 | * Update the codec data routing and configuration settings | |
162 | * from the supplied data. | |
163 | */ | |
164 | static int simtec_hw_params(struct snd_pcm_substream *substream, | |
165 | struct snd_pcm_hw_params *params) | |
166 | { | |
167 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad LG |
168 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
169 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
14412acd BD |
170 | int ret; |
171 | ||
172 | /* Set the CODEC as the bus clock master, I2S */ | |
173 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
174 | SND_SOC_DAIFMT_NB_NF | | |
175 | SND_SOC_DAIFMT_CBM_CFM); | |
176 | if (ret) { | |
177 | pr_err("%s: failed set cpu dai format\n", __func__); | |
178 | return ret; | |
179 | } | |
180 | ||
181 | /* Set the CODEC as the bus clock master */ | |
182 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
183 | SND_SOC_DAIFMT_NB_NF | | |
184 | SND_SOC_DAIFMT_CBM_CFM); | |
185 | if (ret) { | |
186 | pr_err("%s: failed set codec dai format\n", __func__); | |
187 | return ret; | |
188 | } | |
189 | ||
190 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, | |
191 | CODEC_CLOCK, SND_SOC_CLOCK_IN); | |
192 | if (ret) { | |
193 | pr_err( "%s: failed setting codec sysclk\n", __func__); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | if (pdata->use_mpllin) { | |
198 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_MPLL, | |
199 | 0, SND_SOC_CLOCK_OUT); | |
200 | ||
201 | if (ret) { | |
202 | pr_err("%s: failed to set MPLLin as clksrc\n", | |
203 | __func__); | |
204 | return ret; | |
205 | } | |
206 | } | |
207 | ||
208 | if (pdata->output_cdclk) { | |
209 | int cdclk_scale; | |
210 | ||
211 | cdclk_scale = clk_get_rate(xtal_clk) / CODEC_CLOCK; | |
212 | cdclk_scale--; | |
213 | ||
214 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER, | |
215 | cdclk_scale); | |
216 | } | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static int simtec_call_startup(struct s3c24xx_audio_simtec_pdata *pd) | |
222 | { | |
223 | /* call any board supplied startup code, this currently only | |
224 | * covers the bast/vr1000 which have a CPLD in the way of the | |
225 | * LRCLK */ | |
226 | if (pd->startup) | |
227 | pd->startup(); | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static struct snd_soc_ops simtec_snd_ops = { | |
233 | .hw_params = simtec_hw_params, | |
234 | }; | |
235 | ||
236 | /** | |
237 | * attach_gpio_amp - get and configure the necessary gpios | |
238 | * @dev: The device we're probing. | |
239 | * @pd: The platform data supplied by the board. | |
240 | * | |
241 | * If there is a GPIO based amplifier attached to the board, claim | |
242 | * the necessary GPIO lines for it, and set default values. | |
243 | */ | |
244 | static int attach_gpio_amp(struct device *dev, | |
245 | struct s3c24xx_audio_simtec_pdata *pd) | |
246 | { | |
247 | int ret; | |
248 | ||
249 | /* attach gpio amp gain (if any) */ | |
250 | if (pdata->amp_gain[0] > 0) { | |
251 | ret = gpio_request(pd->amp_gain[0], "gpio-amp-gain0"); | |
252 | if (ret) { | |
253 | dev_err(dev, "cannot get amp gpio gain0\n"); | |
254 | return ret; | |
255 | } | |
256 | ||
257 | ret = gpio_request(pd->amp_gain[1], "gpio-amp-gain1"); | |
258 | if (ret) { | |
259 | dev_err(dev, "cannot get amp gpio gain1\n"); | |
260 | gpio_free(pdata->amp_gain[0]); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | gpio_direction_output(pd->amp_gain[0], 0); | |
265 | gpio_direction_output(pd->amp_gain[1], 0); | |
266 | } | |
267 | ||
af901ca1 | 268 | /* note, currently we assume GPA0 isn't valid amp */ |
14412acd BD |
269 | if (pdata->amp_gpio > 0) { |
270 | ret = gpio_request(pd->amp_gpio, "gpio-amp"); | |
271 | if (ret) { | |
272 | dev_err(dev, "cannot get amp gpio %d (%d)\n", | |
273 | pd->amp_gpio, ret); | |
274 | goto err_amp; | |
275 | } | |
276 | ||
277 | /* set the amp off at startup */ | |
278 | spk_unmute_state(0); | |
279 | } | |
280 | ||
281 | return 0; | |
282 | ||
283 | err_amp: | |
284 | if (pd->amp_gain[0] > 0) { | |
285 | gpio_free(pd->amp_gain[0]); | |
286 | gpio_free(pd->amp_gain[1]); | |
287 | } | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | static void detach_gpio_amp(struct s3c24xx_audio_simtec_pdata *pd) | |
293 | { | |
294 | if (pd->amp_gain[0] > 0) { | |
295 | gpio_free(pd->amp_gain[0]); | |
296 | gpio_free(pd->amp_gain[1]); | |
297 | } | |
298 | ||
299 | if (pd->amp_gpio > 0) | |
300 | gpio_free(pd->amp_gpio); | |
301 | } | |
302 | ||
303 | #ifdef CONFIG_PM | |
2e4891a5 | 304 | static int simtec_audio_resume(struct device *dev) |
14412acd BD |
305 | { |
306 | simtec_call_startup(pdata); | |
307 | return 0; | |
308 | } | |
309 | ||
47145210 | 310 | const struct dev_pm_ops simtec_audio_pmops = { |
14412acd BD |
311 | .resume = simtec_audio_resume, |
312 | }; | |
313 | EXPORT_SYMBOL_GPL(simtec_audio_pmops); | |
314 | #endif | |
315 | ||
316 | int __devinit simtec_audio_core_probe(struct platform_device *pdev, | |
f0fba2ad | 317 | struct snd_soc_card *card) |
14412acd BD |
318 | { |
319 | struct platform_device *snd_dev; | |
320 | int ret; | |
321 | ||
f0fba2ad | 322 | card->dai_link->ops = &simtec_snd_ops; |
14412acd BD |
323 | |
324 | pdata = pdev->dev.platform_data; | |
325 | if (!pdata) { | |
326 | dev_err(&pdev->dev, "no platform data supplied\n"); | |
327 | return -EINVAL; | |
328 | } | |
329 | ||
330 | simtec_call_startup(pdata); | |
331 | ||
332 | xtal_clk = clk_get(&pdev->dev, "xtal"); | |
333 | if (IS_ERR(xtal_clk)) { | |
334 | dev_err(&pdev->dev, "could not get clkout0\n"); | |
335 | return -EINVAL; | |
336 | } | |
337 | ||
338 | dev_info(&pdev->dev, "xtal rate is %ld\n", clk_get_rate(xtal_clk)); | |
339 | ||
340 | ret = attach_gpio_amp(&pdev->dev, pdata); | |
341 | if (ret) | |
342 | goto err_clk; | |
343 | ||
344 | snd_dev = platform_device_alloc("soc-audio", -1); | |
345 | if (!snd_dev) { | |
346 | dev_err(&pdev->dev, "failed to alloc soc-audio devicec\n"); | |
347 | ret = -ENOMEM; | |
348 | goto err_gpio; | |
349 | } | |
350 | ||
f0fba2ad | 351 | platform_set_drvdata(snd_dev, card); |
14412acd BD |
352 | |
353 | ret = platform_device_add(snd_dev); | |
354 | if (ret) { | |
355 | dev_err(&pdev->dev, "failed to add soc-audio dev\n"); | |
356 | goto err_pdev; | |
357 | } | |
358 | ||
359 | platform_set_drvdata(pdev, snd_dev); | |
360 | return 0; | |
361 | ||
362 | err_pdev: | |
363 | platform_device_put(snd_dev); | |
364 | ||
365 | err_gpio: | |
366 | detach_gpio_amp(pdata); | |
367 | ||
368 | err_clk: | |
369 | clk_put(xtal_clk); | |
370 | return ret; | |
371 | } | |
372 | EXPORT_SYMBOL_GPL(simtec_audio_core_probe); | |
373 | ||
374 | int __devexit simtec_audio_remove(struct platform_device *pdev) | |
375 | { | |
376 | struct platform_device *snd_dev = platform_get_drvdata(pdev); | |
377 | ||
378 | platform_device_unregister(snd_dev); | |
379 | ||
380 | detach_gpio_amp(pdata); | |
381 | clk_put(xtal_clk); | |
382 | return 0; | |
383 | } | |
384 | EXPORT_SYMBOL_GPL(simtec_audio_remove); | |
385 | ||
386 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
387 | MODULE_DESCRIPTION("ALSA SoC Simtec Audio common support"); | |
388 | MODULE_LICENSE("GPL"); |