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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#include <linux/module.h>
24
25#include <sound/soc.h>
26#include <sound/pcm_params.h>
27
28#include <mach/regs-gpio.h>
29#include <mach/dma.h>
30
31#include "dma.h"
32#include "regs-i2s-v2.h"
33#include "s3c2412-i2s.h"
34
35static struct s3c2410_dma_client s3c2412_dma_client_out = {
36 .name = "I2S PCM Stereo out"
37};
38
39static struct s3c2410_dma_client s3c2412_dma_client_in = {
40 .name = "I2S PCM Stereo in"
41};
42
43static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
44 .client = &s3c2412_dma_client_out,
45 .channel = DMACH_I2S_OUT,
46 .dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD,
47 .dma_size = 4,
48};
49
50static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
51 .client = &s3c2412_dma_client_in,
52 .channel = DMACH_I2S_IN,
53 .dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD,
54 .dma_size = 4,
55};
56
57static struct s3c_i2sv2_info s3c2412_i2s;
58
59static int s3c2412_i2s_probe(struct snd_soc_dai *dai)
60{
61 int ret;
62
63 pr_debug("Entered %s\n", __func__);
64
65 ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS);
66 if (ret)
67 return ret;
68
69 s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in;
70 s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out;
71
72 s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk");
73 if (IS_ERR(s3c2412_i2s.iis_cclk)) {
74 pr_err("failed to get i2sclk clock\n");
75 iounmap(s3c2412_i2s.regs);
76 return PTR_ERR(s3c2412_i2s.iis_cclk);
77 }
78
79
80
81 clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll"));
82 clk_enable(s3c2412_i2s.iis_cclk);
83
84 s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk;
85
86
87 s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2410_GPE0_I2SLRCK);
88 s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2410_GPE1_I2SSCLK);
89 s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2410_GPE2_CDCLK);
90 s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2410_GPE3_I2SSDI);
91 s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2410_GPE4_I2SSDO);
92
93 return 0;
94}
95
96static int s3c2412_i2s_remove(struct snd_soc_dai *dai)
97{
98 clk_disable(s3c2412_i2s.iis_cclk);
99 clk_put(s3c2412_i2s.iis_cclk);
100 iounmap(s3c2412_i2s.regs);
101
102 return 0;
103}
104
105static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream,
106 struct snd_pcm_hw_params *params,
107 struct snd_soc_dai *cpu_dai)
108{
109 struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai);
110 struct s3c_dma_params *dma_data;
111 u32 iismod;
112
113 pr_debug("Entered %s\n", __func__);
114
115 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
116 dma_data = i2s->dma_playback;
117 else
118 dma_data = i2s->dma_capture;
119
120 snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
121
122 iismod = readl(i2s->regs + S3C2412_IISMOD);
123 pr_debug("%s: r: IISMOD: %x\n", __func__, iismod);
124
125 switch (params_format(params)) {
126 case SNDRV_PCM_FORMAT_S8:
127 iismod |= S3C2412_IISMOD_8BIT;
128 break;
129 case SNDRV_PCM_FORMAT_S16_LE:
130 iismod &= ~S3C2412_IISMOD_8BIT;
131 break;
132 }
133
134 writel(iismod, i2s->regs + S3C2412_IISMOD);
135 pr_debug("%s: w: IISMOD: %x\n", __func__, iismod);
136
137 return 0;
138}
139
140#define S3C2412_I2S_RATES \
141 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
142 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
143 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
144
145static struct snd_soc_dai_ops s3c2412_i2s_dai_ops = {
146 .hw_params = s3c2412_i2s_hw_params,
147};
148
149static struct snd_soc_dai_driver s3c2412_i2s_dai = {
150 .probe = s3c2412_i2s_probe,
151 .remove = s3c2412_i2s_remove,
152 .playback = {
153 .channels_min = 2,
154 .channels_max = 2,
155 .rates = S3C2412_I2S_RATES,
156 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
157 },
158 .capture = {
159 .channels_min = 2,
160 .channels_max = 2,
161 .rates = S3C2412_I2S_RATES,
162 .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE,
163 },
164 .ops = &s3c2412_i2s_dai_ops,
165};
166
167static __devinit int s3c2412_iis_dev_probe(struct platform_device *pdev)
168{
169 return snd_soc_register_dai(&pdev->dev, &s3c2412_i2s_dai);
170}
171
172static __devexit int s3c2412_iis_dev_remove(struct platform_device *pdev)
173{
174 snd_soc_unregister_dai(&pdev->dev);
175 return 0;
176}
177
178static struct platform_driver s3c2412_iis_driver = {
179 .probe = s3c2412_iis_dev_probe,
180 .remove = __devexit_p(s3c2412_iis_dev_remove),
181 .driver = {
182 .name = "s3c2412-iis",
183 .owner = THIS_MODULE,
184 },
185};
186
187static int __init s3c2412_i2s_init(void)
188{
189 return platform_driver_register(&s3c2412_iis_driver);
190}
191module_init(s3c2412_i2s_init);
192
193static void __exit s3c2412_i2s_exit(void)
194{
195 platform_driver_unregister(&s3c2412_iis_driver);
196}
197module_exit(s3c2412_i2s_exit);
198
199
200MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
201MODULE_DESCRIPTION("S3C2412 I2S SoC Interface");
202MODULE_LICENSE("GPL");
203MODULE_ALIAS("platform:s3c2412-iis");
204
