1/*
2 * omap3pandora.c  --  SoC audio for Pandora Handheld Console
3 *
4 * Author: Gražvydas Ignotas <notasas@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 *
20 */
21
22#include <linux/clk.h>
23#include <linux/platform_device.h>
24#include <linux/gpio.h>
25#include <linux/delay.h>
26#include <linux/regulator/consumer.h>
27#include <linux/module.h>
28
29#include <sound/core.h>
30#include <sound/pcm.h>
31#include <sound/soc.h>
32
33#include <asm/mach-types.h>
34#include <linux/platform_data/asoc-ti-mcbsp.h>
35
36#include "omap-mcbsp.h"
37
38#define OMAP3_PANDORA_DAC_POWER_GPIO	118
39#define OMAP3_PANDORA_AMP_POWER_GPIO	14
40
41#define PREFIX "ASoC omap3pandora: "
42
43static struct regulator *omap3pandora_dac_reg;
44
45static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
46	struct snd_pcm_hw_params *params)
47{
48	struct snd_soc_pcm_runtime *rtd = substream->private_data;
49	struct snd_soc_dai *codec_dai = rtd->codec_dai;
50	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
51	int ret;
52
53	/* Set the codec system clock for DAC and ADC */
54	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
55					    SND_SOC_CLOCK_IN);
56	if (ret < 0) {
57		pr_err(PREFIX "can't set codec system clock\n");
58		return ret;
59	}
60
61	/* Set McBSP clock to external */
62	ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
63				     256 * params_rate(params),
64				     SND_SOC_CLOCK_IN);
65	if (ret < 0) {
66		pr_err(PREFIX "can't set cpu system clock\n");
67		return ret;
68	}
69
70	ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
71	if (ret < 0) {
72		pr_err(PREFIX "can't set SRG clock divider\n");
73		return ret;
74	}
75
76	return 0;
77}
78
79static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
80	struct snd_kcontrol *k, int event)
81{
82	int ret;
83
84	/*
85	 * The PCM1773 DAC datasheet requires 1ms delay between switching
86	 * VCC power on/off and /PD pin high/low
87	 */
88	if (SND_SOC_DAPM_EVENT_ON(event)) {
89		ret = regulator_enable(omap3pandora_dac_reg);
90		if (ret) {
91			dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
92			return ret;
93		}
94		mdelay(1);
95		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
96	} else {
97		gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
98		mdelay(1);
99		regulator_disable(omap3pandora_dac_reg);
100	}
101
102	return 0;
103}
104
105static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
106	struct snd_kcontrol *k, int event)
107{
108	if (SND_SOC_DAPM_EVENT_ON(event))
109		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
110	else
111		gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
112
113	return 0;
114}
115
116/*
117 * Audio paths on Pandora board:
118 *
119 *  |O| ---> PCM DAC +-> AMP -> Headphone Jack
120 *  |M|         A    +--------> Line Out
121 *  |A| <~~clk~~+
122 *  |P| <--- TWL4030 <--------- Line In and MICs
123 */
124static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
125	SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
126			   0, 0, omap3pandora_dac_event,
127			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
128	SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
129			   0, 0, NULL, 0, omap3pandora_hp_event,
130			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
131	SND_SOC_DAPM_HP("Headphone Jack", NULL),
132	SND_SOC_DAPM_LINE("Line Out", NULL),
133
134	SND_SOC_DAPM_MIC("Mic (internal)", NULL),
135	SND_SOC_DAPM_MIC("Mic (external)", NULL),
136	SND_SOC_DAPM_LINE("Line In", NULL),
137};
138
139static const struct snd_soc_dapm_route omap3pandora_map[] = {
140	{"PCM DAC", NULL, "APLL Enable"},
141	{"Headphone Amplifier", NULL, "PCM DAC"},
142	{"Line Out", NULL, "PCM DAC"},
143	{"Headphone Jack", NULL, "Headphone Amplifier"},
144
145	{"AUXL", NULL, "Line In"},
146	{"AUXR", NULL, "Line In"},
147
148	{"MAINMIC", NULL, "Mic (internal)"},
149	{"Mic (internal)", NULL, "Mic Bias 1"},
150
151	{"SUBMIC", NULL, "Mic (external)"},
152	{"Mic (external)", NULL, "Mic Bias 2"},
153};
154
155static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
156{
157	struct snd_soc_codec *codec = rtd->codec;
158	struct snd_soc_dapm_context *dapm = &codec->dapm;
159
160	/* All TWL4030 output pins are floating */
161	snd_soc_dapm_nc_pin(dapm, "EARPIECE");
162	snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
163	snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
164	snd_soc_dapm_nc_pin(dapm, "HSOL");
165	snd_soc_dapm_nc_pin(dapm, "HSOR");
166	snd_soc_dapm_nc_pin(dapm, "CARKITL");
167	snd_soc_dapm_nc_pin(dapm, "CARKITR");
168	snd_soc_dapm_nc_pin(dapm, "HFL");
169	snd_soc_dapm_nc_pin(dapm, "HFR");
170	snd_soc_dapm_nc_pin(dapm, "VIBRA");
171
172	return 0;
173}
174
175static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
176{
177	struct snd_soc_codec *codec = rtd->codec;
178	struct snd_soc_dapm_context *dapm = &codec->dapm;
179
180	/* Not comnnected */
181	snd_soc_dapm_nc_pin(dapm, "HSMIC");
182	snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
183	snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
184	snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
185
186	return 0;
187}
188
189static struct snd_soc_ops omap3pandora_ops = {
190	.hw_params = omap3pandora_hw_params,
191};
192
193/* Digital audio interface glue - connects codec <--> CPU */
194static struct snd_soc_dai_link omap3pandora_dai[] = {
195	{
196		.name = "PCM1773",
197		.stream_name = "HiFi Out",
198		.cpu_dai_name = "omap-mcbsp.2",
199		.codec_dai_name = "twl4030-hifi",
200		.platform_name = "omap-mcbsp.2",
201		.codec_name = "twl4030-codec",
202		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
203			   SND_SOC_DAIFMT_CBS_CFS,
204		.ops = &omap3pandora_ops,
205		.init = omap3pandora_out_init,
206	}, {
207		.name = "TWL4030",
208		.stream_name = "Line/Mic In",
209		.cpu_dai_name = "omap-mcbsp.4",
210		.codec_dai_name = "twl4030-hifi",
211		.platform_name = "omap-mcbsp.4",
212		.codec_name = "twl4030-codec",
213		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
214			   SND_SOC_DAIFMT_CBS_CFS,
215		.ops = &omap3pandora_ops,
216		.init = omap3pandora_in_init,
217	}
218};
219
220/* SoC card */
221static struct snd_soc_card snd_soc_card_omap3pandora = {
222	.name = "omap3pandora",
223	.owner = THIS_MODULE,
224	.dai_link = omap3pandora_dai,
225	.num_links = ARRAY_SIZE(omap3pandora_dai),
226
227	.dapm_widgets = omap3pandora_dapm_widgets,
228	.num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
229	.dapm_routes = omap3pandora_map,
230	.num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
231};
232
233static struct platform_device *omap3pandora_snd_device;
234
235static int __init omap3pandora_soc_init(void)
236{
237	int ret;
238
239	if (!machine_is_omap3_pandora())
240		return -ENODEV;
241
242	pr_info("OMAP3 Pandora SoC init\n");
243
244	ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
245	if (ret) {
246		pr_err(PREFIX "Failed to get DAC power GPIO\n");
247		return ret;
248	}
249
250	ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
251	if (ret) {
252		pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
253		goto fail0;
254	}
255
256	ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
257	if (ret) {
258		pr_err(PREFIX "Failed to get amp power GPIO\n");
259		goto fail0;
260	}
261
262	ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
263	if (ret) {
264		pr_err(PREFIX "Failed to set amp power GPIO direction\n");
265		goto fail1;
266	}
267
268	omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
269	if (omap3pandora_snd_device == NULL) {
270		pr_err(PREFIX "Platform device allocation failed\n");
271		ret = -ENOMEM;
272		goto fail1;
273	}
274
275	platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
276
277	ret = platform_device_add(omap3pandora_snd_device);
278	if (ret) {
279		pr_err(PREFIX "Unable to add platform device\n");
280		goto fail2;
281	}
282
283	omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
284	if (IS_ERR(omap3pandora_dac_reg)) {
285		pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
286			dev_name(&omap3pandora_snd_device->dev),
287			PTR_ERR(omap3pandora_dac_reg));
288		ret = PTR_ERR(omap3pandora_dac_reg);
289		goto fail3;
290	}
291
292	return 0;
293
294fail3:
295	platform_device_del(omap3pandora_snd_device);
296fail2:
297	platform_device_put(omap3pandora_snd_device);
298fail1:
299	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
300fail0:
301	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
302	return ret;
303}
304module_init(omap3pandora_soc_init);
305
306static void __exit omap3pandora_soc_exit(void)
307{
308	regulator_put(omap3pandora_dac_reg);
309	platform_device_unregister(omap3pandora_snd_device);
310	gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
311	gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
312}
313module_exit(omap3pandora_soc_exit);
314
315MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
316MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
317MODULE_LICENSE("GPL");
318