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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
42static struct s3c2410_dma_client s3c64xx_dma_client_out = {
43 .name = "I2S PCM Stereo out"
44};
45
46static struct s3c2410_dma_client s3c64xx_dma_client_in = {
47 .name = "I2S PCM Stereo in"
48};
49
50static 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
65static 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
80static struct s3c_i2sv2_info s3c64xx_i2s[2];
81
82static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai)
83{
84 return cpu_dai->private_data;
85}
86
87static 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
111struct clk *s3c64xx_i2s_get_clock(struct snd_soc_dai *dai)
112{
113 struct s3c_i2sv2_info *i2s = to_info(dai);
114
115 return i2s->iis_cclk;
116}
117EXPORT_SYMBOL_GPL(s3c64xx_i2s_get_clock);
118
119static int s3c64xx_i2s_probe(struct platform_device *pdev,
120 struct snd_soc_dai *dai)
121{
122
123 switch (dai->id) {
124 case 0:
125 s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK);
126 s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK);
127 s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK);
128 s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI);
129 s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0);
130 break;
131 case 1:
132 s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK);
133 s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK);
134 s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK);
135 s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI);
136 s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0);
137 }
138
139 return 0;
140}
141
142
143#define S3C64XX_I2S_RATES \
144 (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
145 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
146 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
147
148#define S3C64XX_I2S_FMTS \
149 (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
150 SNDRV_PCM_FMTBIT_S24_LE)
151
152static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = {
153 .set_sysclk = s3c64xx_i2s_set_sysclk,
154};
155
156struct snd_soc_dai s3c64xx_i2s_dai[] = {
157 {
158 .name = "s3c64xx-i2s",
159 .id = 0,
160 .probe = s3c64xx_i2s_probe,
161 .playback = {
162 .channels_min = 2,
163 .channels_max = 2,
164 .rates = S3C64XX_I2S_RATES,
165 .formats = S3C64XX_I2S_FMTS,
166 },
167 .capture = {
168 .channels_min = 2,
169 .channels_max = 2,
170 .rates = S3C64XX_I2S_RATES,
171 .formats = S3C64XX_I2S_FMTS,
172 },
173 .ops = &s3c64xx_i2s_dai_ops,
174 .symmetric_rates = 1,
175 },
176 {
177 .name = "s3c64xx-i2s",
178 .id = 1,
179 .probe = s3c64xx_i2s_probe,
180 .playback = {
181 .channels_min = 2,
182 .channels_max = 2,
183 .rates = S3C64XX_I2S_RATES,
184 .formats = S3C64XX_I2S_FMTS,
185 },
186 .capture = {
187 .channels_min = 2,
188 .channels_max = 2,
189 .rates = S3C64XX_I2S_RATES,
190 .formats = S3C64XX_I2S_FMTS,
191 },
192 .ops = &s3c64xx_i2s_dai_ops,
193 .symmetric_rates = 1,
194 },
195};
196EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);
197
198static __devinit int s3c64xx_iis_dev_probe(struct platform_device *pdev)
199{
200 struct s3c_i2sv2_info *i2s;
201 struct snd_soc_dai *dai;
202 int ret;
203
204 if (pdev->id >= ARRAY_SIZE(s3c64xx_i2s)) {
205 dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
206 return -EINVAL;
207 }
208
209 i2s = &s3c64xx_i2s[pdev->id];
210 dai = &s3c64xx_i2s_dai[pdev->id];
211 dai->dev = &pdev->dev;
212
213 i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id];
214 i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id];
215
216 i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus");
217 if (IS_ERR(i2s->iis_cclk)) {
218 dev_err(&pdev->dev, "failed to get audio-bus\n");
219 ret = PTR_ERR(i2s->iis_cclk);
220 goto err;
221 }
222
223 clk_enable(i2s->iis_cclk);
224
225 ret = s3c_i2sv2_probe(pdev, dai, i2s, 0);
226 if (ret)
227 goto err_clk;
228
229 ret = s3c_i2sv2_register_dai(dai);
230 if (ret != 0)
231 goto err_i2sv2;
232
233 return 0;
234
235err_i2sv2:
236
237err_clk:
238 clk_put(i2s->iis_cclk);
239err:
240 return ret;
241}
242
243static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev)
244{
245 dev_err(&pdev->dev, "Device removal not yet supported\n");
246 return 0;
247}
248
249static struct platform_driver s3c64xx_iis_driver = {
250 .probe = s3c64xx_iis_dev_probe,
251 .remove = s3c64xx_iis_dev_remove,
252 .driver = {
253 .name = "s3c64xx-iis",
254 .owner = THIS_MODULE,
255 },
256};
257
258static int __init s3c64xx_i2s_init(void)
259{
260 return platform_driver_register(&s3c64xx_iis_driver);
261}
262module_init(s3c64xx_i2s_init);
263
264static void __exit s3c64xx_i2s_exit(void)
265{
266 platform_driver_unregister(&s3c64xx_iis_driver);
267}
268module_exit(s3c64xx_i2s_exit);
269
270
271MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
272MODULE_DESCRIPTION("S3C64XX I2S SoC Interface");
273MODULE_LICENSE("GPL");
274
