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>
42 #include <linux/atmel-ssc.h>
44 #include <sound/core.h>
45 #include <sound/pcm.h>
46 #include <sound/pcm_params.h>
47 #include <sound/soc.h>
49 #include "../codecs/wm8731.h"
50 #include "atmel-pcm.h"
51 #include "atmel_ssc_dai.h"
53 #define MCLK_RATE 12000000
56 * As shipped the board does not have inputs. However, it is relatively
57 * straightforward to modify the board to hook them up so support is left
60 #undef ENABLE_MIC_INPUT
62 static struct clk
*mclk
;
64 static int at91sam9g20ek_set_bias_level(struct snd_soc_card
*card
,
65 struct snd_soc_dapm_context
*dapm
,
66 enum snd_soc_bias_level level
)
73 case SND_SOC_BIAS_PREPARE
:
75 ret
= clk_enable(mclk
);
80 case SND_SOC_BIAS_OFF
:
81 case SND_SOC_BIAS_STANDBY
:
91 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets
[] = {
92 SND_SOC_DAPM_MIC("Int Mic", NULL
),
93 SND_SOC_DAPM_SPK("Ext Spk", NULL
),
96 static const struct snd_soc_dapm_route intercon
[] = {
98 /* speaker connected to LHPOUT */
99 {"Ext Spk", NULL
, "LHPOUT"},
101 /* mic is connected to Mic Jack, with WM8731 Mic Bias */
102 {"MICIN", NULL
, "Mic Bias"},
103 {"Mic Bias", NULL
, "Int Mic"},
107 * Logic for a wm8731 as connected on a at91sam9g20ek board.
109 static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime
*rtd
)
111 struct snd_soc_codec
*codec
= rtd
->codec
;
112 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
113 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
117 "at91sam9g20ek_wm8731 "
118 ": at91sam9g20ek_wm8731_init() called\n");
120 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8731_SYSCLK_MCLK
,
121 MCLK_RATE
, SND_SOC_CLOCK_IN
);
123 printk(KERN_ERR
"Failed to set WM8731 SYSCLK: %d\n", ret
);
128 snd_soc_dapm_nc_pin(dapm
, "RLINEIN");
129 snd_soc_dapm_nc_pin(dapm
, "LLINEIN");
131 #ifndef ENABLE_MIC_INPUT
132 snd_soc_dapm_nc_pin(&rtd
->card
->dapm
, "Int Mic");
138 static struct snd_soc_dai_link at91sam9g20ek_dai
= {
140 .stream_name
= "WM8731 PCM",
141 .cpu_dai_name
= "at91rm9200_ssc.0",
142 .codec_dai_name
= "wm8731-hifi",
143 .init
= at91sam9g20ek_wm8731_init
,
144 .platform_name
= "at91rm9200_ssc.0",
145 .codec_name
= "wm8731.0-001b",
146 .dai_fmt
= SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
|
147 SND_SOC_DAIFMT_CBM_CFM
,
150 static struct snd_soc_card snd_soc_at91sam9g20ek
= {
151 .name
= "AT91SAMG20-EK",
152 .owner
= THIS_MODULE
,
153 .dai_link
= &at91sam9g20ek_dai
,
155 .set_bias_level
= at91sam9g20ek_set_bias_level
,
157 .dapm_widgets
= at91sam9g20ek_dapm_widgets
,
158 .num_dapm_widgets
= ARRAY_SIZE(at91sam9g20ek_dapm_widgets
),
159 .dapm_routes
= intercon
,
160 .num_dapm_routes
= ARRAY_SIZE(intercon
),
163 static int at91sam9g20ek_audio_probe(struct platform_device
*pdev
)
165 struct device_node
*np
= pdev
->dev
.of_node
;
166 struct device_node
*codec_np
, *cpu_np
;
168 struct snd_soc_card
*card
= &snd_soc_at91sam9g20ek
;
175 ret
= atmel_ssc_set_audio(0);
177 dev_err(&pdev
->dev
, "ssc channel is not valid\n");
182 * Codec MCLK is supplied by PCK0 - set it up.
184 mclk
= clk_get(NULL
, "pck0");
186 printk(KERN_ERR
"ASoC: Failed to get MCLK\n");
191 pllb
= clk_get(NULL
, "pllb");
193 printk(KERN_ERR
"ASoC: Failed to get PLLB\n");
197 ret
= clk_set_parent(mclk
, pllb
);
200 printk(KERN_ERR
"ASoC: Failed to set MCLK parent\n");
204 clk_set_rate(mclk
, MCLK_RATE
);
206 card
->dev
= &pdev
->dev
;
208 /* Parse device node info */
209 ret
= snd_soc_of_parse_card_name(card
, "atmel,model");
213 ret
= snd_soc_of_parse_audio_routing(card
,
214 "atmel,audio-routing");
218 /* Parse codec info */
219 at91sam9g20ek_dai
.codec_name
= NULL
;
220 codec_np
= of_parse_phandle(np
, "atmel,audio-codec", 0);
222 dev_err(&pdev
->dev
, "codec info missing\n");
225 at91sam9g20ek_dai
.codec_of_node
= codec_np
;
227 /* Parse dai and platform info */
228 at91sam9g20ek_dai
.cpu_dai_name
= NULL
;
229 at91sam9g20ek_dai
.platform_name
= NULL
;
230 cpu_np
= of_parse_phandle(np
, "atmel,ssc-controller", 0);
232 dev_err(&pdev
->dev
, "dai and pcm info missing\n");
235 at91sam9g20ek_dai
.cpu_of_node
= cpu_np
;
236 at91sam9g20ek_dai
.platform_of_node
= cpu_np
;
238 of_node_put(codec_np
);
241 ret
= snd_soc_register_card(card
);
243 printk(KERN_ERR
"ASoC: snd_soc_register_card() failed\n");
252 atmel_ssc_put_audio(0);
256 static int at91sam9g20ek_audio_remove(struct platform_device
*pdev
)
258 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
262 snd_soc_unregister_card(card
);
263 atmel_ssc_put_audio(0);
269 static const struct of_device_id at91sam9g20ek_wm8731_dt_ids
[] = {
270 { .compatible
= "atmel,at91sam9g20ek-wm8731-audio", },
273 MODULE_DEVICE_TABLE(of
, at91sam9g20ek_wm8731_dt_ids
);
276 static struct platform_driver at91sam9g20ek_audio_driver
= {
278 .name
= "at91sam9g20ek-audio",
279 .of_match_table
= of_match_ptr(at91sam9g20ek_wm8731_dt_ids
),
281 .probe
= at91sam9g20ek_audio_probe
,
282 .remove
= at91sam9g20ek_audio_remove
,
285 module_platform_driver(at91sam9g20ek_audio_driver
);
287 /* Module information */
288 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
289 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
290 MODULE_ALIAS("platform:at91sam9g20ek-audio");
291 MODULE_LICENSE("GPL");