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19#include <linux/delay.h>
20#include <linux/gpio.h>
21#include <linux/clk.h>
22#include <linux/io.h>
23
24#include <sound/soc.h>
25#include <sound/pcm_params.h>
26
27#include <mach/regs-gpio.h>
28#include <mach/dma.h>
29
30#include "dma.h"
31#include "regs-i2s-v2.h"
32#include "s3c2412-i2s.h"
33
34static struct s3c2410_dma_client s3c2412_dma_client_out = {
35 .name = "I2S PCM Stereo out"
36};
37
38static struct s3c2410_dma_client s3c2412_dma_client_in = {
39 .name = "I2S PCM Stereo in"
40};
41
42static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
43 .client = &s3c2412_dma_client_out,
44 .channel = DMACH_I2S_OUT,
45 .dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
46 .dma_size = 4,
47};
48
49static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
50 .client = &s3c2412_dma_client_in,
51 .channel = DMACH_I2S_IN,
52 .dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
53 .dma_size = 4,
54};
55
56static struct s3c_i2sv2_info s3c2412_i2s;
57
58static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
59{
60 int ret;
61
62 pr_debug("Entered %s\n", __func__);
63
64 ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
65 if (ret)
66 return ret;
67
68 s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
69 s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
70
71 s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
72 if (s3c2412_i2s.iis_cclk == NULL) {
73 pr_err("failed to get i2sclk clock\n");
74 iounmap(s3c2412_i2s.regs);
75 return -ENODEV;
76 }
77
78
79
80 clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
81 clk_enable(s3c2412_i2s.iis_cclk);
82
83 s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
84
85
86 s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
87 s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
88 s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
89 s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
90 s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
91
92 return 0;
93}
94
95static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
96{
97 clk_disable(s3c2412_i2s.iis_cclk);
98 clk_put(s3c2412_i2s.iis_cclk);
99 iounmap(s3c2412_i2s.regs);
100
101 return 0;
102}
103
104static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
105 struct snd_pcm_hw_params *params,
106 struct snd_soc_dai *cpu_dai)
107{
108 struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
109 struct s3c_dma_params *dma_data;
110 u32 iismod;
111
112 pr_debug("Entered %s\n", __func__);
113
114 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
115 dma_data = i2s->dma_playback;
116 else
117 dma_data = i2s->dma_capture;
118
119 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
120
121 iismod = readl(i2s->regs + S3C2412_IISMOD);
122 pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
123
124 switch (params_format(params)) {
125 case SNDRV_PCM_FORMAT_S8:
126 iismod |= S3C2412_IISMOD_8BIT;
127 break;
128 case SNDRV_PCM_FORMAT_S16_LE:
129 iismod &= ~S3C2412_IISMOD_8BIT;
130 break;
131 }
132
133 writel(iismod, i2s->regs + S3C2412_IISMOD);
134 pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
135
136 return 0;
137}
138
139#define S3C2412_I2S_RATES \
140 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
141 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
142 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
143
144static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
145 .hw_params = s3c2412_i2s_hw_params,
146};
147
148static struct snd_soc_dai_driver s3c2412_i2s_dai = {
149 .probe = s3c2412_i2s_probe,
150 .remove = s3c2412_i2s_remove,
151 .playback = {
152 .channels_min = 2,
153 .channels_max = 2,
154 .rates = S3C2412_I2S_RATES,
155 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
156 },
157 .capture = {
158 .channels_min = 2,
159 .channels_max = 2,
160 .rates = S3C2412_I2S_RATES,
161 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
162 },
163 .ops = &s3c2412_i2s_dai_ops,
164};
165
166static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
167{
168 return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
169}
170
171static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
172{
173 snd_soc_unregister_dai(&pdev->dev);
174 return 0;
175}
176
177static struct platform_driver s3c2412_iis_driver = {
178 .probe = s3c2412_iis_dev_probe,
179 .remove = s3c2412_iis_dev_remove,
180 .driver = {
181 .name = "s3c2412-iis",
182 .owner = THIS_MODULE,
183 },
184};
185
186static int __init s3c2412_i2s_init(void)
187{
188 return platform_driver_register(&s3c2412_iis_driver);
189}
190module_init(s3c2412_i2s_init);
191
192static void __exit s3c2412_i2s_exit(void)
193{
194 platform_driver_unregister(&s3c2412_iis_driver);
195}
196module_exit(s3c2412_i2s_exit);
197
198
199MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
200MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
201MODULE_LICENSE("GPL");
202MODULE_ALIAS("platform:s3c2412-iis");
203
