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/atmel-ssc.h>
43 #include <sound/core.h>
44 #include <sound/pcm.h>
45 #include <sound/pcm_params.h>
46 #include <sound/soc.h>
47 #include <sound/soc-dapm.h>
49 #include <asm/mach-types.h>
50 #include <mach/hardware.h>
51 #include <mach/gpio.h>
53 #include "../codecs/wm8731.h"
54 #include "atmel-pcm.h"
55 #include "atmel_ssc_dai.h"
57 #define MCLK_RATE 12000000
60 * As shipped the board does not have inputs. However, it is relatively
61 * straightforward to modify the board to hook them up so support is left
64 #undef ENABLE_MIC_INPUT
66 static struct clk
*mclk
;
68 static int at91sam9g20ek_hw_params(struct snd_pcm_substream
*substream
,
69 struct snd_pcm_hw_params
*params
)
71 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
72 struct snd_soc_dai
*codec_dai
= rtd
->dai
->codec_dai
;
73 struct snd_soc_dai
*cpu_dai
= rtd
->dai
->cpu_dai
;
76 /* set codec DAI configuration */
77 ret
= snd_soc_dai_set_fmt(codec_dai
, SND_SOC_DAIFMT_I2S
|
78 SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM
);
82 /* set cpu DAI configuration */
83 ret
= snd_soc_dai_set_fmt(cpu_dai
, SND_SOC_DAIFMT_I2S
|
84 SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBM_CFM
);
91 static struct snd_soc_ops at91sam9g20ek_ops
= {
92 .hw_params
= at91sam9g20ek_hw_params
,
95 static int at91sam9g20ek_set_bias_level(struct snd_soc_card
*card
,
96 enum snd_soc_bias_level level
)
102 case SND_SOC_BIAS_ON
:
103 case SND_SOC_BIAS_PREPARE
:
105 ret
= clk_enable(mclk
);
110 case SND_SOC_BIAS_OFF
:
111 case SND_SOC_BIAS_STANDBY
:
121 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets
[] = {
122 SND_SOC_DAPM_MIC("Int Mic", NULL
),
123 SND_SOC_DAPM_SPK("Ext Spk", NULL
),
126 static const struct snd_soc_dapm_route intercon
[] = {
128 /* speaker connected to LHPOUT */
129 {"Ext Spk", NULL
, "LHPOUT"},
131 /* mic is connected to Mic Jack, with WM8731 Mic Bias */
132 {"MICIN", NULL
, "Mic Bias"},
133 {"Mic Bias", NULL
, "Int Mic"},
137 * Logic for a wm8731 as connected on a at91sam9g20ek board.
139 static int at91sam9g20ek_wm8731_init(struct snd_soc_codec
*codec
)
141 struct snd_soc_dai
*codec_dai
= &codec
->dai
[0];
145 "at91sam9g20ek_wm8731 "
146 ": at91sam9g20ek_wm8731_init() called\n");
148 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8731_SYSCLK
,
149 MCLK_RATE
, SND_SOC_CLOCK_IN
);
151 printk(KERN_ERR
"Failed to set WM8731 SYSCLK: %d\n", ret
);
155 /* Add specific widgets */
156 snd_soc_dapm_new_controls(codec
, at91sam9g20ek_dapm_widgets
,
157 ARRAY_SIZE(at91sam9g20ek_dapm_widgets
));
158 /* Set up specific audio path interconnects */
159 snd_soc_dapm_add_routes(codec
, intercon
, ARRAY_SIZE(intercon
));
162 snd_soc_dapm_nc_pin(codec
, "RLINEIN");
163 snd_soc_dapm_nc_pin(codec
, "LLINEIN");
165 #ifdef ENABLE_MIC_INPUT
166 snd_soc_dapm_enable_pin(codec
, "Int Mic");
168 snd_soc_dapm_nc_pin(codec
, "Int Mic");
171 /* always connected */
172 snd_soc_dapm_enable_pin(codec
, "Ext Spk");
174 snd_soc_dapm_sync(codec
);
179 static struct snd_soc_dai_link at91sam9g20ek_dai
= {
181 .stream_name
= "WM8731 PCM",
182 .cpu_dai
= &atmel_ssc_dai
[0],
183 .codec_dai
= &wm8731_dai
,
184 .init
= at91sam9g20ek_wm8731_init
,
185 .ops
= &at91sam9g20ek_ops
,
188 static struct snd_soc_card snd_soc_at91sam9g20ek
= {
189 .name
= "AT91SAMG20-EK",
190 .platform
= &atmel_soc_platform
,
191 .dai_link
= &at91sam9g20ek_dai
,
193 .set_bias_level
= at91sam9g20ek_set_bias_level
,
196 static struct snd_soc_device at91sam9g20ek_snd_devdata
= {
197 .card
= &snd_soc_at91sam9g20ek
,
198 .codec_dev
= &soc_codec_dev_wm8731
,
201 static struct platform_device
*at91sam9g20ek_snd_device
;
203 static int __init
at91sam9g20ek_init(void)
205 struct atmel_ssc_info
*ssc_p
= at91sam9g20ek_dai
.cpu_dai
->private_data
;
206 struct ssc_device
*ssc
= NULL
;
210 if (!machine_is_at91sam9g20ek())
214 * Codec MCLK is supplied by PCK0 - set it up.
216 mclk
= clk_get(NULL
, "pck0");
218 printk(KERN_ERR
"ASoC: Failed to get MCLK\n");
223 pllb
= clk_get(NULL
, "pllb");
225 printk(KERN_ERR
"ASoC: Failed to get PLLB\n");
229 ret
= clk_set_parent(mclk
, pllb
);
232 printk(KERN_ERR
"ASoC: Failed to set MCLK parent\n");
236 clk_set_rate(mclk
, MCLK_RATE
);
241 ssc
= ssc_request(0);
243 printk(KERN_ERR
"ASoC: Failed to request SSC 0\n");
250 at91sam9g20ek_snd_device
= platform_device_alloc("soc-audio", -1);
251 if (!at91sam9g20ek_snd_device
) {
252 printk(KERN_ERR
"ASoC: Platform device allocation failed\n");
256 platform_set_drvdata(at91sam9g20ek_snd_device
,
257 &at91sam9g20ek_snd_devdata
);
258 at91sam9g20ek_snd_devdata
.dev
= &at91sam9g20ek_snd_device
->dev
;
260 ret
= platform_device_add(at91sam9g20ek_snd_device
);
262 printk(KERN_ERR
"ASoC: Platform device allocation failed\n");
263 platform_device_put(at91sam9g20ek_snd_device
);
278 static void __exit
at91sam9g20ek_exit(void)
280 struct atmel_ssc_info
*ssc_p
= at91sam9g20ek_dai
.cpu_dai
->private_data
;
281 struct ssc_device
*ssc
;
290 platform_device_unregister(at91sam9g20ek_snd_device
);
291 at91sam9g20ek_snd_device
= NULL
;
296 module_init(at91sam9g20ek_init
);
297 module_exit(at91sam9g20ek_exit
);
299 /* Module information */
300 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
301 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
302 MODULE_LICENSE("GPL");