1 /* sound/soc/s3c24xx/s3c24xx_simtec.c
3 * Copyright 2009 Simtec Electronics
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.
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>
17 #include <sound/core.h>
18 #include <sound/pcm.h>
19 #include <sound/soc.h>
20 #include <sound/soc-dapm.h>
22 #include <plat/audio-simtec.h>
25 #include "s3c24xx-i2s.h"
26 #include "s3c24xx_simtec.h"
28 static struct s3c24xx_audio_simtec_pdata *pdata;
29 static struct clk *xtal_clk;
32 static int spk_unmute;
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.
39 * Read the value for the AMP gain control.
41 static int speaker_gain_get(struct snd_kcontrol *kcontrol,
42 struct snd_ctl_elem_value *ucontrol)
44 ucontrol->value.integer.value[0] = spk_gain;
49 * speaker_gain_set - set the value of the speaker amp gain
50 * @value: The value to write.
52 static void speaker_gain_set(int value)
54 gpio_set_value_cansleep(pdata->amp_gain[0], value & 1);
55 gpio_set_value_cansleep(pdata->amp_gain[1], value >> 1);
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.
63 * Set the value of the speaker gain from the specified
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.
70 static int speaker_gain_put(struct snd_kcontrol *kcontrol,
71 struct snd_ctl_elem_value *ucontrol)
73 int value = ucontrol->value.integer.value[0];
78 speaker_gain_set(value);
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),
89 * spk_unmute_state - set the unmute state of the speaker
90 * @to: zero to unmute, non-zero to ununmute.
92 static void spk_unmute_state(int to)
94 pr_debug("%s: to=%d\n", __func__, to);
97 gpio_set_value(pdata->amp_gpio, to);
99 /* if we're umuting, also re-set the gain */
100 if (to && pdata->amp_gain[0] > 0)
101 speaker_gain_set(spk_gain);
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.
109 * Read the value for the AMP gain control.
111 static int speaker_unmute_get(struct snd_kcontrol *kcontrol,
112 struct snd_ctl_elem_value *ucontrol)
114 ucontrol->value.integer.value[0] = spk_unmute;
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.
123 * Set the value of the speaker gain from the specified
126 static int speaker_unmute_put(struct snd_kcontrol *kcontrol,
127 struct snd_ctl_elem_value *ucontrol)
129 spk_unmute_state(ucontrol->value.integer.value[0]);
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.
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),
142 void simtec_audio_init(struct snd_soc_pcm_runtime *rtd)
144 struct snd_soc_codec *codec = rtd->codec;
146 if (pdata->amp_gpio > 0) {
147 pr_debug("%s: adding amp routes\n", __func__);
149 snd_soc_add_controls(codec, amp_unmute_controls,
150 ARRAY_SIZE(amp_unmute_controls));
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));
159 EXPORT_SYMBOL_GPL(simtec_audio_init);
161 #define CODEC_CLOCK 12000000
164 * simtec_hw_params - update hardware parameters
165 * @substream: The audio substream instance.
166 * @params: The parameters requested.
168 * Update the codec data routing and configuration settings
169 * from the supplied data.
171 static int simtec_hw_params(struct snd_pcm_substream *substream,
172 struct snd_pcm_hw_params *params)
174 struct snd_soc_pcm_runtime *rtd = substream->private_data;
175 struct snd_soc_dai *codec_dai = rtd->codec_dai;
176 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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);
184 pr_err("%s: failed set cpu dai format\n", __func__);
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);
193 pr_err("%s: failed set codec dai format\n", __func__);
197 ret = snd_soc_dai_set_sysclk(codec_dai, 0,
198 CODEC_CLOCK, SND_SOC_CLOCK_IN);
200 pr_err( "%s: failed setting codec sysclk\n", __func__);
204 if (pdata->use_mpllin) {
205 ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_MPLL,
206 0, SND_SOC_CLOCK_OUT);
209 pr_err("%s: failed to set MPLLin as clksrc\n",
215 if (pdata->output_cdclk) {
218 cdclk_scale = clk_get_rate(xtal_clk) / CODEC_CLOCK;
221 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
228 static int simtec_call_startup(struct s3c24xx_audio_simtec_pdata *pd)
230 /* call any board supplied startup code, this currently only
231 * covers the bast/vr1000 which have a CPLD in the way of the
239 static struct snd_soc_ops simtec_snd_ops = {
240 .hw_params = simtec_hw_params,
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.
248 * If there is a GPIO based amplifier attached to the board, claim
249 * the necessary GPIO lines for it, and set default values.
251 static int attach_gpio_amp(struct device *dev,
252 struct s3c24xx_audio_simtec_pdata *pd)
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");
260 dev_err(dev, "cannot get amp gpio gain0\n");
264 ret = gpio_request(pd->amp_gain[1], "gpio-amp-gain1");
266 dev_err(dev, "cannot get amp gpio gain1\n");
267 gpio_free(pdata->amp_gain[0]);
271 gpio_direction_output(pd->amp_gain[0], 0);
272 gpio_direction_output(pd->amp_gain[1], 0);
275 /* note, currently we assume GPA0 isn't valid amp */
276 if (pdata->amp_gpio > 0) {
277 ret = gpio_request(pd->amp_gpio, "gpio-amp");
279 dev_err(dev, "cannot get amp gpio %d (%d)\n",
284 /* set the amp off at startup */
291 if (pd->amp_gain[0] > 0) {
292 gpio_free(pd->amp_gain[0]);
293 gpio_free(pd->amp_gain[1]);
299 static void detach_gpio_amp(struct s3c24xx_audio_simtec_pdata *pd)
301 if (pd->amp_gain[0] > 0) {
302 gpio_free(pd->amp_gain[0]);
303 gpio_free(pd->amp_gain[1]);
306 if (pd->amp_gpio > 0)
307 gpio_free(pd->amp_gpio);
311 int simtec_audio_resume(struct device *dev)
313 simtec_call_startup(pdata);
317 const struct dev_pm_ops simtec_audio_pmops = {
318 .resume = simtec_audio_resume,
320 EXPORT_SYMBOL_GPL(simtec_audio_pmops);
323 int __devinit simtec_audio_core_probe(struct platform_device *pdev,
324 struct snd_soc_card *card)
326 struct platform_device *snd_dev;
329 card->dai_link->ops = &simtec_snd_ops;
331 pdata = pdev->dev.platform_data;
333 dev_err(&pdev->dev, "no platform data supplied\n");
337 simtec_call_startup(pdata);
339 xtal_clk = clk_get(&pdev->dev, "xtal");
340 if (IS_ERR(xtal_clk)) {
341 dev_err(&pdev->dev, "could not get clkout0\n");
345 dev_info(&pdev->dev, "xtal rate is %ld\n", clk_get_rate(xtal_clk));
347 ret = attach_gpio_amp(&pdev->dev, pdata);
351 snd_dev = platform_device_alloc("soc-audio", -1);
353 dev_err(&pdev->dev, "failed to alloc soc-audio devicec\n");
358 platform_set_drvdata(snd_dev, card);
360 ret = platform_device_add(snd_dev);
362 dev_err(&pdev->dev, "failed to add soc-audio dev\n");
366 platform_set_drvdata(pdev, snd_dev);
370 platform_device_put(snd_dev);
373 detach_gpio_amp(pdata);
379 EXPORT_SYMBOL_GPL(simtec_audio_core_probe);
381 int __devexit simtec_audio_remove(struct platform_device *pdev)
383 struct platform_device *snd_dev = platform_get_drvdata(pdev);
385 platform_device_unregister(snd_dev);
387 detach_gpio_amp(pdata);
391 EXPORT_SYMBOL_GPL(simtec_audio_remove);
393 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
394 MODULE_DESCRIPTION("ALSA SoC Simtec Audio common support");
395 MODULE_LICENSE("GPL");