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f8cf8176 BD |
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 | { | |
f8cf8176 | 123 | /* configure GPIO for i2s port */ |
172fd9e2 | 124 | switch (dai->id) { |
f8cf8176 BD |
125 | case 0: |
126 | s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK); | |
127 | s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK); | |
128 | s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK); | |
129 | s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI); | |
130 | s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0); | |
131 | break; | |
132 | case 1: | |
133 | s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK); | |
134 | s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK); | |
135 | s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK); | |
136 | s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI); | |
137 | s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0); | |
138 | } | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | ||
144 | #define S3C64XX_I2S_RATES \ | |
145 | (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ | |
146 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
147 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | |
148 | ||
149 | #define S3C64XX_I2S_FMTS \ | |
150 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE) | |
151 | ||
f2a5d6a2 MB |
152 | static struct snd_soc_dai_ops s3c64xx_i2s_dai_ops = { |
153 | .set_sysclk = s3c64xx_i2s_set_sysclk, | |
154 | }; | |
155 | ||
172fd9e2 MB |
156 | struct 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, | |
4bc4d899 | 174 | .symmetric_rates = 1, |
f8cf8176 | 175 | }, |
172fd9e2 MB |
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, | |
4bc4d899 | 193 | .symmetric_rates = 1, |
f8cf8176 | 194 | }, |
f8cf8176 BD |
195 | }; |
196 | EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai); | |
197 | ||
172fd9e2 MB |
198 | static __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"); | |
219 | ret = PTR_ERR(i2s->iis_cclk); | |
220 | goto err; | |
221 | } | |
222 | ||
223 | ret = s3c_i2sv2_probe(pdev, dai, i2s, | |
224 | dai->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0); | |
225 | if (ret) | |
226 | goto err_clk; | |
227 | ||
a7be4d92 | 228 | ret = s3c_i2sv2_register_dai(dai); |
172fd9e2 MB |
229 | if (ret != 0) |
230 | goto err_i2sv2; | |
231 | ||
232 | return 0; | |
233 | ||
234 | err_i2sv2: | |
235 | /* Not implemented for I2Sv2 core yet */ | |
236 | err_clk: | |
237 | clk_put(i2s->iis_cclk); | |
238 | err: | |
239 | return ret; | |
240 | } | |
241 | ||
242 | static __devexit int s3c64xx_iis_dev_remove(struct platform_device *pdev) | |
243 | { | |
244 | dev_err(&pdev->dev, "Device removal not yet supported\n"); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static struct platform_driver s3c64xx_iis_driver = { | |
249 | .probe = s3c64xx_iis_dev_probe, | |
250 | .remove = s3c64xx_iis_dev_remove, | |
251 | .driver = { | |
252 | .name = "s3c64xx-iis", | |
253 | .owner = THIS_MODULE, | |
254 | }, | |
255 | }; | |
256 | ||
f8cf8176 BD |
257 | static int __init s3c64xx_i2s_init(void) |
258 | { | |
172fd9e2 | 259 | return platform_driver_register(&s3c64xx_iis_driver); |
f8cf8176 BD |
260 | } |
261 | module_init(s3c64xx_i2s_init); | |
262 | ||
263 | static void __exit s3c64xx_i2s_exit(void) | |
264 | { | |
172fd9e2 | 265 | platform_driver_unregister(&s3c64xx_iis_driver); |
f8cf8176 BD |
266 | } |
267 | module_exit(s3c64xx_i2s_exit); | |
268 | ||
269 | /* Module information */ | |
270 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
271 | MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); | |
272 | MODULE_LICENSE("GPL"); |