1 /* sound/soc/s3c24xx/s3c64xx-i2s.c
3 * ALSA SoC Audio Layer - S3C64XX I2S driver
5 * Copyright 2008 Openmoko, Inc.
6 * Copyright 2008 Simtec Electronics
7 * Ben Dooks <ben@simtec.co.uk>
8 * http://armlinux.simtec.co.uk/
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/init.h>
16 #include <linux/module.h>
17 #include <linux/device.h>
18 #include <linux/delay.h>
19 #include <linux/clk.h>
20 #include <linux/kernel.h>
21 #include <linux/gpio.h>
24 #include <sound/core.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/initval.h>
28 #include <sound/soc.h>
30 #include <plat/regs-s3c2412-iis.h>
31 #include <plat/gpio-bank-d.h>
32 #include <plat/gpio-bank-e.h>
33 #include <plat/gpio-cfg.h>
34 #include <plat/audio.h>
39 #include "s3c24xx-pcm.h"
40 #include "s3c64xx-i2s.h"
42 static struct s3c2410_dma_client s3c64xx_dma_client_out
= {
43 .name
= "I2S PCM Stereo out"
46 static struct s3c2410_dma_client s3c64xx_dma_client_in
= {
47 .name
= "I2S PCM Stereo in"
50 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out
[2] = {
52 .channel
= DMACH_I2S0_OUT
,
53 .client
= &s3c64xx_dma_client_out
,
54 .dma_addr
= S3C64XX_PA_IIS0
+ S3C2412_IISTXD
,
58 .channel
= DMACH_I2S1_OUT
,
59 .client
= &s3c64xx_dma_client_out
,
60 .dma_addr
= S3C64XX_PA_IIS1
+ S3C2412_IISTXD
,
65 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in
[2] = {
67 .channel
= DMACH_I2S0_IN
,
68 .client
= &s3c64xx_dma_client_in
,
69 .dma_addr
= S3C64XX_PA_IIS0
+ S3C2412_IISRXD
,
73 .channel
= DMACH_I2S1_IN
,
74 .client
= &s3c64xx_dma_client_in
,
75 .dma_addr
= S3C64XX_PA_IIS1
+ S3C2412_IISRXD
,
80 static struct s3c_i2sv2_info s3c64xx_i2s
[2];
82 static inline struct s3c_i2sv2_info
*to_info(struct snd_soc_dai
*cpu_dai
)
84 return cpu_dai
->private_data
;
87 static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai
*cpu_dai
,
88 int clk_id
, unsigned int freq
, int dir
)
90 struct s3c_i2sv2_info
*i2s
= to_info(cpu_dai
);
91 u32 iismod
= readl(i2s
->regs
+ S3C2412_IISMOD
);
94 case S3C64XX_CLKSRC_PCLK
:
95 iismod
&= ~S3C64XX_IISMOD_IMS_SYSMUX
;
98 case S3C64XX_CLKSRC_MUX
:
99 iismod
|= S3C64XX_IISMOD_IMS_SYSMUX
;
106 writel(iismod
, i2s
->regs
+ S3C2412_IISMOD
);
112 unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai
*dai
)
114 struct s3c_i2sv2_info
*i2s
= to_info(dai
);
116 return clk_get_rate(i2s
->iis_cclk
);
118 EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate
);
120 static int s3c64xx_i2s_probe(struct platform_device
*pdev
,
121 struct snd_soc_dai
*dai
)
123 struct device
*dev
= &pdev
->dev
;
124 struct s3c_i2sv2_info
*i2s
;
127 dev_dbg(dev
, "%s: probing dai %d\n", __func__
, pdev
->id
);
129 if (pdev
->id
< 0 || pdev
->id
> ARRAY_SIZE(s3c64xx_i2s
)) {
130 dev_err(dev
, "id %d out of range\n", pdev
->id
);
134 i2s
= &s3c64xx_i2s
[pdev
->id
];
136 ret
= s3c_i2sv2_probe(pdev
, dai
, i2s
,
137 pdev
->id
? S3C64XX_PA_IIS1
: S3C64XX_PA_IIS0
);
141 i2s
->dma_capture
= &s3c64xx_i2s_pcm_stereo_in
[pdev
->id
];
142 i2s
->dma_playback
= &s3c64xx_i2s_pcm_stereo_out
[pdev
->id
];
144 i2s
->iis_cclk
= clk_get(dev
, "audio-bus");
145 if (IS_ERR(i2s
->iis_cclk
)) {
146 dev_err(dev
, "failed to get audio-bus");
151 /* configure GPIO for i2s port */
154 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK
);
155 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK
);
156 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK
);
157 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI
);
158 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0
);
161 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK
);
162 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK
);
163 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK
);
164 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI
);
165 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0
);
172 #define S3C64XX_I2S_RATES \
173 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
174 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
175 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
177 #define S3C64XX_I2S_FMTS \
178 (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE)
180 static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops
= {
181 .set_sysclk
= s3c64xx_i2s_set_sysclk
,
184 struct snd_soc_dai s3c64xx_i2s_dai
= {
185 .name
= "s3c64xx-i2s",
187 .probe
= s3c64xx_i2s_probe
,
191 .rates
= S3C64XX_I2S_RATES
,
192 .formats
= S3C64XX_I2S_FMTS
,
197 .rates
= S3C64XX_I2S_RATES
,
198 .formats
= S3C64XX_I2S_FMTS
,
200 .ops
= &s3c64xx_i2s_dai_ops
,
202 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai
);
204 static int __init
s3c64xx_i2s_init(void)
206 return s3c_i2sv2_register_dai(&s3c64xx_i2s_dai
);
208 module_init(s3c64xx_i2s_init
);
210 static void __exit
s3c64xx_i2s_exit(void)
212 snd_soc_unregister_dai(&s3c64xx_i2s_dai
);
214 module_exit(s3c64xx_i2s_exit
);
216 /* Module information */
217 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
218 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
219 MODULE_LICENSE("GPL");