2 * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
3 * ATMEL AT91SAM9G20ek board.
5 * Copyright (C) 2005 SAN People
6 * Copyright (C) 2008 Atmel
8 * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
10 * Based on ati_b1_wm8731.c by:
11 * Frank Mandarino <fmandarino@endrelia.com>
12 * Copyright 2006 Endrelia Technologies Inc.
13 * Based on corgi.c by:
14 * Copyright 2005 Wolfson Microelectronics PLC.
15 * Copyright 2005 Openedhand Ltd.
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2 of the License, or
20 * (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/kernel.h>
35 #include <linux/clk.h>
36 #include <linux/timer.h>
37 #include <linux/interrupt.h>
38 #include <linux/platform_device.h>
39 #include <linux/i2c.h>
41 #include <linux/pinctrl/consumer.h>
43 #include <linux/atmel-ssc.h>
45 #include <sound/core.h>
46 #include <sound/pcm.h>
47 #include <sound/pcm_params.h>
48 #include <sound/soc.h>
50 #include <asm/mach-types.h>
51 #include <mach/hardware.h>
52 #include <mach/gpio.h>
54 #include "../codecs/wm8731.h"
55 #include "atmel-pcm.h"
56 #include "atmel_ssc_dai.h"
58 #define MCLK_RATE 12000000
61 * As shipped the board does not have inputs. However, it is relatively
62 * straightforward to modify the board to hook them up so support is left
65 #undef ENABLE_MIC_INPUT
67 static struct clk
*mclk
;
69 static int at91sam9g20ek_hw_params(struct snd_pcm_substream
*substream
,
70 struct snd_pcm_hw_params
*params
)
72 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
73 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
74 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
77 /* set codec DAI configuration */
78 ret
= snd_soc_dai_set_fmt(codec_dai
, SND_SOC_DAIFMT_I2S
|
79 SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM
);
83 /* set cpu DAI configuration */
84 ret
= snd_soc_dai_set_fmt(cpu_dai
, SND_SOC_DAIFMT_I2S
|
85 SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM
);
92 static struct snd_soc_ops at91sam9g20ek_ops
= {
93 .hw_params
= at91sam9g20ek_hw_params
,
96 static int at91sam9g20ek_set_bias_level(struct snd_soc_card
*card
,
97 struct snd_soc_dapm_context
*dapm
,
98 enum snd_soc_bias_level level
)
104 case SND_SOC_BIAS_ON
:
105 case SND_SOC_BIAS_PREPARE
:
107 ret
= clk_enable(mclk
);
112 case SND_SOC_BIAS_OFF
:
113 case SND_SOC_BIAS_STANDBY
:
123 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets
[] = {
124 SND_SOC_DAPM_MIC("Int Mic", NULL
),
125 SND_SOC_DAPM_SPK("Ext Spk", NULL
),
128 static const struct snd_soc_dapm_route intercon
[] = {
130 /* speaker connected to LHPOUT */
131 {"Ext Spk", NULL
, "LHPOUT"},
133 /* mic is connected to Mic Jack, with WM8731 Mic Bias */
134 {"MICIN", NULL
, "Mic Bias"},
135 {"Mic Bias", NULL
, "Int Mic"},
139 * Logic for a wm8731 as connected on a at91sam9g20ek board.
141 static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime
*rtd
)
143 struct snd_soc_codec
*codec
= rtd
->codec
;
144 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
145 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
149 "at91sam9g20ek_wm8731 "
150 ": at91sam9g20ek_wm8731_init() called\n");
152 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8731_SYSCLK_MCLK
,
153 MCLK_RATE
, SND_SOC_CLOCK_IN
);
155 printk(KERN_ERR
"Failed to set WM8731 SYSCLK: %d\n", ret
);
159 /* Add specific widgets */
160 snd_soc_dapm_new_controls(dapm
, at91sam9g20ek_dapm_widgets
,
161 ARRAY_SIZE(at91sam9g20ek_dapm_widgets
));
162 /* Set up specific audio path interconnects */
163 snd_soc_dapm_add_routes(dapm
, intercon
, ARRAY_SIZE(intercon
));
166 snd_soc_dapm_nc_pin(dapm
, "RLINEIN");
167 snd_soc_dapm_nc_pin(dapm
, "LLINEIN");
169 #ifdef ENABLE_MIC_INPUT
170 snd_soc_dapm_enable_pin(dapm
, "Int Mic");
172 snd_soc_dapm_nc_pin(dapm
, "Int Mic");
175 /* always connected */
176 snd_soc_dapm_enable_pin(dapm
, "Ext Spk");
181 static struct snd_soc_dai_link at91sam9g20ek_dai
= {
183 .stream_name
= "WM8731 PCM",
184 .cpu_dai_name
= "at91rm9200_ssc.0",
185 .codec_dai_name
= "wm8731-hifi",
186 .init
= at91sam9g20ek_wm8731_init
,
187 .platform_name
= "at91rm9200_ssc.0",
188 .codec_name
= "wm8731.0-001b",
189 .ops
= &at91sam9g20ek_ops
,
192 static struct snd_soc_card snd_soc_at91sam9g20ek
= {
193 .name
= "AT91SAMG20-EK",
194 .owner
= THIS_MODULE
,
195 .dai_link
= &at91sam9g20ek_dai
,
197 .set_bias_level
= at91sam9g20ek_set_bias_level
,
200 static int __devinit
at91sam9g20ek_audio_probe(struct platform_device
*pdev
)
202 struct device_node
*np
= pdev
->dev
.of_node
;
203 struct device_node
*codec_np
, *cpu_np
;
205 struct snd_soc_card
*card
= &snd_soc_at91sam9g20ek
;
206 struct pinctrl
*pinctrl
;
209 pinctrl
= devm_pinctrl_get_select_default(&pdev
->dev
);
210 if (IS_ERR(pinctrl
)) {
211 dev_err(&pdev
->dev
, "Failed to request pinctrl for mck\n");
212 return PTR_ERR(pinctrl
);
216 if (!(machine_is_at91sam9g20ek() ||
217 machine_is_at91sam9g20ek_2mmc()))
221 ret
= atmel_ssc_set_audio(0);
223 dev_err(&pdev
->dev
, "ssc channel is not valid\n");
228 * Codec MCLK is supplied by PCK0 - set it up.
230 mclk
= clk_get(NULL
, "pck0");
232 printk(KERN_ERR
"ASoC: Failed to get MCLK\n");
237 pllb
= clk_get(NULL
, "pllb");
239 printk(KERN_ERR
"ASoC: Failed to get PLLB\n");
243 ret
= clk_set_parent(mclk
, pllb
);
246 printk(KERN_ERR
"ASoC: Failed to set MCLK parent\n");
250 clk_set_rate(mclk
, MCLK_RATE
);
252 card
->dev
= &pdev
->dev
;
254 /* Parse device node info */
256 ret
= snd_soc_of_parse_card_name(card
, "atmel,model");
260 ret
= snd_soc_of_parse_audio_routing(card
,
261 "atmel,audio-routing");
265 /* Parse codec info */
266 at91sam9g20ek_dai
.codec_name
= NULL
;
267 codec_np
= of_parse_phandle(np
, "atmel,audio-codec", 0);
269 dev_err(&pdev
->dev
, "codec info missing\n");
272 at91sam9g20ek_dai
.codec_of_node
= codec_np
;
274 /* Parse dai and platform info */
275 at91sam9g20ek_dai
.cpu_dai_name
= NULL
;
276 at91sam9g20ek_dai
.platform_name
= NULL
;
277 cpu_np
= of_parse_phandle(np
, "atmel,ssc-controller", 0);
279 dev_err(&pdev
->dev
, "dai and pcm info missing\n");
282 at91sam9g20ek_dai
.cpu_of_node
= cpu_np
;
283 at91sam9g20ek_dai
.platform_of_node
= cpu_np
;
285 of_node_put(codec_np
);
289 ret
= snd_soc_register_card(card
);
291 printk(KERN_ERR
"ASoC: snd_soc_register_card() failed\n");
300 atmel_ssc_put_audio(0);
304 static int __devexit
at91sam9g20ek_audio_remove(struct platform_device
*pdev
)
306 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
308 atmel_ssc_put_audio(0);
309 snd_soc_unregister_card(card
);
317 static const struct of_device_id at91sam9g20ek_wm8731_dt_ids
[] = {
318 { .compatible
= "atmel,at91sam9g20ek-wm8731-audio", },
321 MODULE_DEVICE_TABLE(of
, at91sam9g20ek_wm8731_dt_ids
);
324 static struct platform_driver at91sam9g20ek_audio_driver
= {
326 .name
= "at91sam9g20ek-audio",
327 .owner
= THIS_MODULE
,
328 .of_match_table
= of_match_ptr(at91sam9g20ek_wm8731_dt_ids
),
330 .probe
= at91sam9g20ek_audio_probe
,
331 .remove
= __devexit_p(at91sam9g20ek_audio_remove
),
334 module_platform_driver(at91sam9g20ek_audio_driver
);
336 /* Module information */
337 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
338 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
339 MODULE_ALIAS("platform:at91sam9g20ek-audio");
340 MODULE_LICENSE("GPL");