1/*
  2 * osk5912.c  --  SoC audio for OSK 5912
  3 *
  4 * Copyright (C) 2008 Mistral Solutions
  5 *
  6 * Contact: Arun KS  <arunks@mistralsolutions.com>
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License
 10 * version 2 as published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful, but
 13 * WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 20 * 02110-1301 USA
 21 *
 22 */
 23
 24#include <linux/clk.h>
 25#include <linux/platform_device.h>
 26#include <sound/core.h>
 27#include <sound/pcm.h>
 28#include <sound/soc.h>
 29
 30#include <asm/mach-types.h>
 31#include <mach/hardware.h>
 32#include <linux/gpio.h>
 33#include <plat/mcbsp.h>
 34
 35#include "omap-mcbsp.h"
 36#include "omap-pcm.h"
 37#include "../codecs/tlv320aic23.h"
 38
 39#define CODEC_CLOCK 	12000000
 40
 41static struct clk *tlv320aic23_mclk;
 42
 43static int osk_startup(struct snd_pcm_substream *substream)
 44{
 45	return clk_enable(tlv320aic23_mclk);
 46}
 47
 48static void osk_shutdown(struct snd_pcm_substream *substream)
 49{
 50	clk_disable(tlv320aic23_mclk);
 51}
 52
 53static int osk_hw_params(struct snd_pcm_substream *substream,
 54			 struct snd_pcm_hw_params *params)
 55{
 56	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 57	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 58	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 59	int err;
 60
 61	/* Set codec DAI configuration */
 62	err = snd_soc_dai_set_fmt(codec_dai,
 63				  SND_SOC_DAIFMT_DSP_B |
 64				  SND_SOC_DAIFMT_NB_NF |
 65				  SND_SOC_DAIFMT_CBM_CFM);
 66	if (err < 0) {
 67		printk(KERN_ERR "can't set codec DAI configuration\n");
 68		return err;
 69	}
 70
 71	/* Set cpu DAI configuration */
 72	err = snd_soc_dai_set_fmt(cpu_dai,
 73				  SND_SOC_DAIFMT_DSP_B |
 74				  SND_SOC_DAIFMT_NB_NF |
 75				  SND_SOC_DAIFMT_CBM_CFM);
 76	if (err < 0) {
 77		printk(KERN_ERR "can't set cpu DAI configuration\n");
 78		return err;
 79	}
 80
 81	/* Set the codec system clock for DAC and ADC */
 82	err =
 83	    snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK, SND_SOC_CLOCK_IN);
 84
 85	if (err < 0) {
 86		printk(KERN_ERR "can't set codec system clock\n");
 87		return err;
 88	}
 89
 90	return err;
 91}
 92
 93static struct snd_soc_ops osk_ops = {
 94	.startup = osk_startup,
 95	.hw_params = osk_hw_params,
 96	.shutdown = osk_shutdown,
 97};
 98
 99static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
100	SND_SOC_DAPM_HP("Headphone Jack", NULL),
101	SND_SOC_DAPM_LINE("Line In", NULL),
102	SND_SOC_DAPM_MIC("Mic Jack", NULL),
103};
104
105static const struct snd_soc_dapm_route audio_map[] = {
106	{"Headphone Jack", NULL, "LHPOUT"},
107	{"Headphone Jack", NULL, "RHPOUT"},
108
109	{"LLINEIN", NULL, "Line In"},
110	{"RLINEIN", NULL, "Line In"},
111
112	{"MICIN", NULL, "Mic Jack"},
113};
114
115static int osk_tlv320aic23_init(struct snd_soc_pcm_runtime *rtd)
116{
117	struct snd_soc_codec *codec = rtd->codec;
118	struct snd_soc_dapm_context *dapm = &codec->dapm;
119
120	/* Add osk5912 specific widgets */
121	snd_soc_dapm_new_controls(dapm, tlv320aic23_dapm_widgets,
122				  ARRAY_SIZE(tlv320aic23_dapm_widgets));
123
124	/* Set up osk5912 specific audio path audio_map */
125	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
126
127	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
128	snd_soc_dapm_enable_pin(dapm, "Line In");
129	snd_soc_dapm_enable_pin(dapm, "Mic Jack");
130
131	snd_soc_dapm_sync(dapm);
132
133	return 0;
134}
135
136/* Digital audio interface glue - connects codec <--> CPU */
137static struct snd_soc_dai_link osk_dai = {
138	.name = "TLV320AIC23",
139	.stream_name = "AIC23",
140	.cpu_dai_name = "omap-mcbsp-dai.0",
141	.codec_dai_name = "tlv320aic23-hifi",
142	.platform_name = "omap-pcm-audio",
143	.codec_name = "tlv320aic23-codec",
144	.init = osk_tlv320aic23_init,
145	.ops = &osk_ops,
146};
147
148/* Audio machine driver */
149static struct snd_soc_card snd_soc_card_osk = {
150	.name = "OSK5912",
151	.dai_link = &osk_dai,
152	.num_links = 1,
153};
154
155static struct platform_device *osk_snd_device;
156
157static int __init osk_soc_init(void)
158{
159	int err;
160	u32 curRate;
161	struct device *dev;
162
163	if (!(machine_is_omap_osk()))
164		return -ENODEV;
165
166	osk_snd_device = platform_device_alloc("soc-audio", -1);
167	if (!osk_snd_device)
168		return -ENOMEM;
169
170	platform_set_drvdata(osk_snd_device, &snd_soc_card_osk);
171	err = platform_device_add(osk_snd_device);
172	if (err)
173		goto err1;
174
175	dev = &osk_snd_device->dev;
176
177	tlv320aic23_mclk = clk_get(dev, "mclk");
178	if (IS_ERR(tlv320aic23_mclk)) {
179		printk(KERN_ERR "Could not get mclk clock\n");
180		err = PTR_ERR(tlv320aic23_mclk);
181		goto err2;
182	}
183
184	/*
185	 * Configure 12 MHz output on MCLK.
186	 */
187	curRate = (uint) clk_get_rate(tlv320aic23_mclk);
188	if (curRate != CODEC_CLOCK) {
189		if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
190			printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
191			err = -ECANCELED;
192			goto err3;
193		}
194	}
195
196	printk(KERN_INFO "MCLK = %d [%d]\n",
197	       (uint) clk_get_rate(tlv320aic23_mclk), CODEC_CLOCK);
198
199	return 0;
200
201err3:
202	clk_put(tlv320aic23_mclk);
203err2:
204	platform_device_del(osk_snd_device);
205err1:
206	platform_device_put(osk_snd_device);
207
208	return err;
209
210}
211
212static void __exit osk_soc_exit(void)
213{
214	clk_put(tlv320aic23_mclk);
215	platform_device_unregister(osk_snd_device);
216}
217
218module_init(osk_soc_init);
219module_exit(osk_soc_exit);
220
221MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
222MODULE_DESCRIPTION("ALSA SoC OSK 5912");
223MODULE_LICENSE("GPL");