Merge branch 'topic/docbook-fix' into for-linus
[linux-2.6] / sound / soc / s3c24xx / s3c64xx-i2s.c
1 /* sound/soc/s3c24xx/s3c64xx-i2s.c
2  *
3  * ALSA SoC Audio Layer - S3C64XX I2S driver
4  *
5  * Copyright 2008 Openmoko, Inc.
6  * Copyright 2008 Simtec Electronics
7  *      Ben Dooks <ben@simtec.co.uk>
8  *      http://armlinux.simtec.co.uk/
9  *
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.
13  */
14
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>
22 #include <linux/io.h>
23
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>
29
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>
35
36 #include <mach/map.h>
37 #include <mach/dma.h>
38
39 #include "s3c24xx-pcm.h"
40 #include "s3c64xx-i2s.h"
41
42 static struct s3c2410_dma_client s3c64xx_dma_client_out = {
43         .name           = "I2S PCM Stereo out"
44 };
45
46 static struct s3c2410_dma_client s3c64xx_dma_client_in = {
47         .name           = "I2S PCM Stereo in"
48 };
49
50 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_out[2] = {
51         [0] = {
52                 .channel        = DMACH_I2S0_OUT,
53                 .client         = &s3c64xx_dma_client_out,
54                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISTXD,
55                 .dma_size       = 4,
56         },
57         [1] = {
58                 .channel        = DMACH_I2S1_OUT,
59                 .client         = &s3c64xx_dma_client_out,
60                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISTXD,
61                 .dma_size       = 4,
62         },
63 };
64
65 static struct s3c24xx_pcm_dma_params s3c64xx_i2s_pcm_stereo_in[2] = {
66         [0] = {
67                 .channel        = DMACH_I2S0_IN,
68                 .client         = &s3c64xx_dma_client_in,
69                 .dma_addr       = S3C64XX_PA_IIS0 + S3C2412_IISRXD,
70                 .dma_size       = 4,
71         },
72         [1] = {
73                 .channel        = DMACH_I2S1_IN,
74                 .client         = &s3c64xx_dma_client_in,
75                 .dma_addr       = S3C64XX_PA_IIS1 + S3C2412_IISRXD,
76                 .dma_size       = 4,
77         },
78 };
79
80 static struct s3c_i2sv2_info s3c64xx_i2s[2];
81
82 static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
83 {
84         return cpu_dai->private_data;
85 }
86
87 static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
88                                   int clk_id, unsigned int freq, int dir)
89 {
90         struct s3c_i2sv2_info *i2s = to_info(cpu_dai);
91         u32 iismod = readl(i2s->regs + S3C2412_IISMOD);
92
93         switch (clk_id) {
94         case S3C64XX_CLKSRC_PCLK:
95                 iismod &= ~S3C64XX_IISMOD_IMS_SYSMUX;
96                 break;
97
98         case S3C64XX_CLKSRC_MUX:
99                 iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
100                 break;
101
102         default:
103                 return -EINVAL;
104         }
105
106         writel(iismod, i2s->regs + S3C2412_IISMOD);
107
108         return 0;
109 }
110
111
112 unsigned long s3c64xx_i2s_get_clockrate(struct snd_soc_dai *dai)
113 {
114         struct s3c_i2sv2_info *i2s = to_info(dai);
115
116         return clk_get_rate(i2s->iis_cclk);
117 }
118 EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clockrate);
119
120 static int s3c64xx_i2s_probe(struct platform_device *pdev,
121                              struct snd_soc_dai *dai)
122 {
123         struct device *dev = &pdev->dev;
124         struct s3c_i2sv2_info *i2s;
125         int ret;
126
127         dev_dbg(dev, "%s: probing dai %d\n", __func__, pdev->id);
128
129         if (pdev->id < 0 || pdev->id > ARRAY_SIZE(s3c64xx_i2s)) {
130                 dev_err(dev, "id %d out of range\n", pdev->id);
131                 return -EINVAL;
132         }
133
134         i2s = &s3c64xx_i2s[pdev->id];
135
136         ret = s3c_i2sv2_probe(pdev, dai, i2s,
137                               pdev->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0);
138         if (ret)
139                 return ret;
140
141         i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
142         i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
143
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");
147                 iounmap(i2s->regs);
148                 return -ENODEV;
149         }
150
151         /* configure GPIO for i2s port */
152         switch (pdev->id) {
153         case 0:
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);
159                 break;
160         case 1:
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);
166         }
167
168         return 0;
169 }
170
171
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)
176
177 #define S3C64XX_I2S_FMTS \
178         (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE)
179
180 static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
181         .set_sysclk     = s3c64xx_i2s_set_sysclk,       
182 };
183
184 struct snd_soc_dai s3c64xx_i2s_dai = {
185         .name           = "s3c64xx-i2s",
186         .id             = 0,
187         .probe          = s3c64xx_i2s_probe,
188         .playback = {
189                 .channels_min   = 2,
190                 .channels_max   = 2,
191                 .rates          = S3C64XX_I2S_RATES,
192                 .formats        = S3C64XX_I2S_FMTS,
193         },
194         .capture = {
195                 .channels_min   = 2,
196                 .channels_max   = 2,
197                 .rates          = S3C64XX_I2S_RATES,
198                 .formats        = S3C64XX_I2S_FMTS,
199         },
200         .ops = &s3c64xx_i2s_dai_ops,
201 };
202 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
203
204 static int __init s3c64xx_i2s_init(void)
205 {
206         return  s3c_i2sv2_register_dai(&s3c64xx_i2s_dai);
207 }
208 module_init(s3c64xx_i2s_init);
209
210 static void __exit s3c64xx_i2s_exit(void)
211 {
212         snd_soc_unregister_dai(&s3c64xx_i2s_dai);
213 }
214 module_exit(s3c64xx_i2s_exit);
215
216 /* Module information */
217 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
218 MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
219 MODULE_LICENSE("GPL");
220
221
222