This patch contains scripts to decrease the time taken for
[kvmfornfv.git] / kernel / sound / soc / samsung / s3c2412-i2s.c
1 /* sound/soc/samsung/s3c2412-i2s.c
2  *
3  * ALSA Soc Audio Layer - S3C2412 I2S driver
4  *
5  * Copyright (c) 2006 Wolfson Microelectronics PLC.
6  *      Graeme Gregory graeme.gregory@wolfsonmicro.com
7  *      linux@wolfsonmicro.com
8  *
9  * Copyright (c) 2007, 2004-2005 Simtec Electronics
10  *      http://armlinux.simtec.co.uk/
11  *      Ben Dooks <ben@simtec.co.uk>
12  *
13  * This program is free software; you can redistribute  it and/or modify it
14  * under  the terms of  the GNU General  Public License as published by the
15  * Free Software Foundation;  either version 2 of the  License, or (at your
16  * option) any later version.
17  */
18
19 #include <linux/delay.h>
20 #include <linux/gpio.h>
21 #include <linux/clk.h>
22 #include <linux/io.h>
23 #include <linux/module.h>
24
25 #include <sound/soc.h>
26 #include <sound/pcm_params.h>
27
28 #include <mach/dma.h>
29 #include <mach/gpio-samsung.h>
30 #include <plat/gpio-cfg.h>
31
32 #include "dma.h"
33 #include "regs-i2s-v2.h"
34 #include "s3c2412-i2s.h"
35
36 static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
37         .channel        = DMACH_I2S_OUT,
38         .ch_name        = "tx",
39         .dma_size       = 4,
40 };
41
42 static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
43         .channel        = DMACH_I2S_IN,
44         .ch_name        = "rx",
45         .dma_size       = 4,
46 };
47
48 static struct s3c_i2sv2_info s3c2412_i2s;
49
50 static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
51 {
52         int ret;
53
54         pr_debug("Entered %s\n", __func__);
55
56         samsung_asoc_init_dma_data(dai, &s3c2412_i2s_pcm_stereo_out,
57                 &s3c2412_i2s_pcm_stereo_in);
58
59         ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
60         if (ret)
61                 return ret;
62
63         s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
64         s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
65
66         s3c2412_i2s.iis_cclk = devm_clk_get(dai->dev, "i2sclk");
67         if (IS_ERR(s3c2412_i2s.iis_cclk)) {
68                 pr_err("failed to get i2sclk clock\n");
69                 return PTR_ERR(s3c2412_i2s.iis_cclk);
70         }
71
72         /* Set MPLL as the source for IIS CLK */
73
74         clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
75         clk_prepare_enable(s3c2412_i2s.iis_cclk);
76
77         s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
78
79         /* Configure the I2S pins (GPE0...GPE4) in correct mode */
80         s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2),
81                               S3C_GPIO_PULL_NONE);
82
83         return 0;
84 }
85
86 static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
87 {
88         clk_disable_unprepare(s3c2412_i2s.iis_cclk);
89
90         return 0;
91 }
92
93 static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
94                                  struct snd_pcm_hw_params *params,
95                                  struct snd_soc_dai *cpu_dai)
96 {
97         struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
98         u32 iismod;
99
100         pr_debug("Entered %s\n", __func__);
101
102         iismod = readl(i2s->regs + S3C2412_IISMOD);
103         pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
104
105         switch (params_width(params)) {
106         case 8:
107                 iismod |= S3C2412_IISMOD_8BIT;
108                 break;
109         case 16:
110                 iismod &= ~S3C2412_IISMOD_8BIT;
111                 break;
112         }
113
114         writel(iismod, i2s->regs + S3C2412_IISMOD);
115         pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
116
117         return 0;
118 }
119
120 #define S3C2412_I2S_RATES \
121         (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
122         SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
123         SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
124
125 static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
126         .hw_params      = s3c2412_i2s_hw_params,
127 };
128
129 static struct snd_soc_dai_driver s3c2412_i2s_dai = {
130         .probe          = s3c2412_i2s_probe,
131         .remove = s3c2412_i2s_remove,
132         .playback = {
133                 .channels_min   = 2,
134                 .channels_max   = 2,
135                 .rates          = S3C2412_I2S_RATES,
136                 .formats        = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
137         },
138         .capture = {
139                 .channels_min   = 2,
140                 .channels_max   = 2,
141                 .rates          = S3C2412_I2S_RATES,
142                 .formats        = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
143         },
144         .ops = &s3c2412_i2s_dai_ops,
145 };
146
147 static const struct snd_soc_component_driver s3c2412_i2s_component = {
148         .name           = "s3c2412-i2s",
149 };
150
151 static int s3c2412_iis_dev_probe(struct platform_device *pdev)
152 {
153         int ret = 0;
154         struct resource *res;
155
156         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
157         s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
158         if (IS_ERR(s3c2412_i2s.regs))
159                 return PTR_ERR(s3c2412_i2s.regs);
160
161         s3c2412_i2s_pcm_stereo_out.dma_addr = res->start + S3C2412_IISTXD;
162         s3c2412_i2s_pcm_stereo_in.dma_addr = res->start + S3C2412_IISRXD;
163
164         ret = s3c_i2sv2_register_component(&pdev->dev, -1,
165                                            &s3c2412_i2s_component,
166                                            &s3c2412_i2s_dai);
167         if (ret) {
168                 pr_err("failed to register the dai\n");
169                 return ret;
170         }
171
172         ret = samsung_asoc_dma_platform_register(&pdev->dev);
173         if (ret)
174                 pr_err("failed to register the DMA: %d\n", ret);
175
176         return ret;
177 }
178
179 static struct platform_driver s3c2412_iis_driver = {
180         .probe  = s3c2412_iis_dev_probe,
181         .driver = {
182                 .name = "s3c2412-iis",
183         },
184 };
185
186 module_platform_driver(s3c2412_iis_driver);
187
188 /* Module information */
189 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
190 MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
191 MODULE_LICENSE("GPL");
192 MODULE_ALIAS("platform:s3c2412-iis");