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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 | ||
d3ff5a3e | 24 | #include "s3c-dma.h" |
14412acd BD |
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 | ||
f0fba2ad | 142 | void simtec_audio_init(struct snd_soc_pcm_runtime *rtd) |
14412acd | 143 | { |
f0fba2ad LG |
144 | struct snd_soc_codec *codec = rtd->codec; |
145 | ||
14412acd BD |
146 | if (pdata->amp_gpio > 0) { |
147 | pr_debug("%s: adding amp routes\n", __func__); | |
148 | ||
149 | snd_soc_add_controls(codec, amp_unmute_controls, | |
150 | ARRAY_SIZE(amp_unmute_controls)); | |
151 | } | |
152 | ||
153 | if (pdata->amp_gain[0] > 0) { | |
154 | pr_debug("%s: adding amp controls\n", __func__); | |
155 | snd_soc_add_controls(codec, amp_gain_controls, | |
156 | ARRAY_SIZE(amp_gain_controls)); | |
157 | } | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(simtec_audio_init); | |
160 | ||
161 | #define CODEC_CLOCK 12000000 | |
162 | ||
163 | /** | |
164 | * simtec_hw_params - update hardware parameters | |
165 | * @substream: The audio substream instance. | |
166 | * @params: The parameters requested. | |
167 | * | |
168 | * Update the codec data routing and configuration settings | |
169 | * from the supplied data. | |
170 | */ | |
171 | static int simtec_hw_params(struct snd_pcm_substream *substream, | |
172 | struct snd_pcm_hw_params *params) | |
173 | { | |
174 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad LG |
175 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
176 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
14412acd BD |
177 | int ret; |
178 | ||
179 | /* Set the CODEC as the bus clock master, I2S */ | |
180 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
181 | SND_SOC_DAIFMT_NB_NF | | |
182 | SND_SOC_DAIFMT_CBM_CFM); | |
183 | if (ret) { | |
184 | pr_err("%s: failed set cpu dai format\n", __func__); | |
185 | return ret; | |
186 | } | |
187 | ||
188 | /* Set the CODEC as the bus clock master */ | |
189 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
190 | SND_SOC_DAIFMT_NB_NF | | |
191 | SND_SOC_DAIFMT_CBM_CFM); | |
192 | if (ret) { | |
193 | pr_err("%s: failed set codec dai format\n", __func__); | |
194 | return ret; | |
195 | } | |
196 | ||
197 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, | |
198 | CODEC_CLOCK, SND_SOC_CLOCK_IN); | |
199 | if (ret) { | |
200 | pr_err( "%s: failed setting codec sysclk\n", __func__); | |
201 | return ret; | |
202 | } | |
203 | ||
204 | if (pdata->use_mpllin) { | |
205 | ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_MPLL, | |
206 | 0, SND_SOC_CLOCK_OUT); | |
207 | ||
208 | if (ret) { | |
209 | pr_err("%s: failed to set MPLLin as clksrc\n", | |
210 | __func__); | |
211 | return ret; | |
212 | } | |
213 | } | |
214 | ||
215 | if (pdata->output_cdclk) { | |
216 | int cdclk_scale; | |
217 | ||
218 | cdclk_scale = clk_get_rate(xtal_clk) / CODEC_CLOCK; | |
219 | cdclk_scale--; | |
220 | ||
221 | ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER, | |
222 | cdclk_scale); | |
223 | } | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | static int simtec_call_startup(struct s3c24xx_audio_simtec_pdata *pd) | |
229 | { | |
230 | /* call any board supplied startup code, this currently only | |
231 | * covers the bast/vr1000 which have a CPLD in the way of the | |
232 | * LRCLK */ | |
233 | if (pd->startup) | |
234 | pd->startup(); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static struct snd_soc_ops simtec_snd_ops = { | |
240 | .hw_params = simtec_hw_params, | |
241 | }; | |
242 | ||
243 | /** | |
244 | * attach_gpio_amp - get and configure the necessary gpios | |
245 | * @dev: The device we're probing. | |
246 | * @pd: The platform data supplied by the board. | |
247 | * | |
248 | * If there is a GPIO based amplifier attached to the board, claim | |
249 | * the necessary GPIO lines for it, and set default values. | |
250 | */ | |
251 | static int attach_gpio_amp(struct device *dev, | |
252 | struct s3c24xx_audio_simtec_pdata *pd) | |
253 | { | |
254 | int ret; | |
255 | ||
256 | /* attach gpio amp gain (if any) */ | |
257 | if (pdata->amp_gain[0] > 0) { | |
258 | ret = gpio_request(pd->amp_gain[0], "gpio-amp-gain0"); | |
259 | if (ret) { | |
260 | dev_err(dev, "cannot get amp gpio gain0\n"); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | ret = gpio_request(pd->amp_gain[1], "gpio-amp-gain1"); | |
265 | if (ret) { | |
266 | dev_err(dev, "cannot get amp gpio gain1\n"); | |
267 | gpio_free(pdata->amp_gain[0]); | |
268 | return ret; | |
269 | } | |
270 | ||
271 | gpio_direction_output(pd->amp_gain[0], 0); | |
272 | gpio_direction_output(pd->amp_gain[1], 0); | |
273 | } | |
274 | ||
af901ca1 | 275 | /* note, currently we assume GPA0 isn't valid amp */ |
14412acd BD |
276 | if (pdata->amp_gpio > 0) { |
277 | ret = gpio_request(pd->amp_gpio, "gpio-amp"); | |
278 | if (ret) { | |
279 | dev_err(dev, "cannot get amp gpio %d (%d)\n", | |
280 | pd->amp_gpio, ret); | |
281 | goto err_amp; | |
282 | } | |
283 | ||
284 | /* set the amp off at startup */ | |
285 | spk_unmute_state(0); | |
286 | } | |
287 | ||
288 | return 0; | |
289 | ||
290 | err_amp: | |
291 | if (pd->amp_gain[0] > 0) { | |
292 | gpio_free(pd->amp_gain[0]); | |
293 | gpio_free(pd->amp_gain[1]); | |
294 | } | |
295 | ||
296 | return ret; | |
297 | } | |
298 | ||
299 | static void detach_gpio_amp(struct s3c24xx_audio_simtec_pdata *pd) | |
300 | { | |
301 | if (pd->amp_gain[0] > 0) { | |
302 | gpio_free(pd->amp_gain[0]); | |
303 | gpio_free(pd->amp_gain[1]); | |
304 | } | |
305 | ||
306 | if (pd->amp_gpio > 0) | |
307 | gpio_free(pd->amp_gpio); | |
308 | } | |
309 | ||
310 | #ifdef CONFIG_PM | |
311 | int simtec_audio_resume(struct device *dev) | |
312 | { | |
313 | simtec_call_startup(pdata); | |
314 | return 0; | |
315 | } | |
316 | ||
47145210 | 317 | const struct dev_pm_ops simtec_audio_pmops = { |
14412acd BD |
318 | .resume = simtec_audio_resume, |
319 | }; | |
320 | EXPORT_SYMBOL_GPL(simtec_audio_pmops); | |
321 | #endif | |
322 | ||
323 | int __devinit simtec_audio_core_probe(struct platform_device *pdev, | |
f0fba2ad | 324 | struct snd_soc_card *card) |
14412acd BD |
325 | { |
326 | struct platform_device *snd_dev; | |
327 | int ret; | |
328 | ||
f0fba2ad | 329 | card->dai_link->ops = &simtec_snd_ops; |
14412acd BD |
330 | |
331 | pdata = pdev->dev.platform_data; | |
332 | if (!pdata) { | |
333 | dev_err(&pdev->dev, "no platform data supplied\n"); | |
334 | return -EINVAL; | |
335 | } | |
336 | ||
337 | simtec_call_startup(pdata); | |
338 | ||
339 | xtal_clk = clk_get(&pdev->dev, "xtal"); | |
340 | if (IS_ERR(xtal_clk)) { | |
341 | dev_err(&pdev->dev, "could not get clkout0\n"); | |
342 | return -EINVAL; | |
343 | } | |
344 | ||
345 | dev_info(&pdev->dev, "xtal rate is %ld\n", clk_get_rate(xtal_clk)); | |
346 | ||
347 | ret = attach_gpio_amp(&pdev->dev, pdata); | |
348 | if (ret) | |
349 | goto err_clk; | |
350 | ||
351 | snd_dev = platform_device_alloc("soc-audio", -1); | |
352 | if (!snd_dev) { | |
353 | dev_err(&pdev->dev, "failed to alloc soc-audio devicec\n"); | |
354 | ret = -ENOMEM; | |
355 | goto err_gpio; | |
356 | } | |
357 | ||
f0fba2ad | 358 | platform_set_drvdata(snd_dev, card); |
14412acd BD |
359 | |
360 | ret = platform_device_add(snd_dev); | |
361 | if (ret) { | |
362 | dev_err(&pdev->dev, "failed to add soc-audio dev\n"); | |
363 | goto err_pdev; | |
364 | } | |
365 | ||
366 | platform_set_drvdata(pdev, snd_dev); | |
367 | return 0; | |
368 | ||
369 | err_pdev: | |
370 | platform_device_put(snd_dev); | |
371 | ||
372 | err_gpio: | |
373 | detach_gpio_amp(pdata); | |
374 | ||
375 | err_clk: | |
376 | clk_put(xtal_clk); | |
377 | return ret; | |
378 | } | |
379 | EXPORT_SYMBOL_GPL(simtec_audio_core_probe); | |
380 | ||
381 | int __devexit simtec_audio_remove(struct platform_device *pdev) | |
382 | { | |
383 | struct platform_device *snd_dev = platform_get_drvdata(pdev); | |
384 | ||
385 | platform_device_unregister(snd_dev); | |
386 | ||
387 | detach_gpio_amp(pdata); | |
388 | clk_put(xtal_clk); | |
389 | return 0; | |
390 | } | |
391 | EXPORT_SYMBOL_GPL(simtec_audio_remove); | |
392 | ||
393 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
394 | MODULE_DESCRIPTION("ALSA SoC Simtec Audio common support"); | |
395 | MODULE_LICENSE("GPL"); |