Commit | Line | Data |
---|---|---|
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 | { | |
123 | struct device *dev = &pdev->dev; | |
124 | struct s3c_i2sv2_info *i2s; | |
125 | int ret; | |
126 | ||
127 | dev_dbg(dev, "%s: probing dai %d\n", __func__, pdev->id); | |
128 | ||
129 | if (pdev->id < 0 || pdev->id > ARRAY_SIZE(s3c64xx_i2s)) { | |
130 | dev_err(dev, "id %d out of range\n", pdev->id); | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | i2s = &s3c64xx_i2s[pdev->id]; | |
135 | ||
136 | ret = s3c_i2sv2_probe(pdev, dai, i2s, | |
137 | pdev->id ? S3C64XX_PA_IIS1 : S3C64XX_PA_IIS0); | |
138 | if (ret) | |
139 | return ret; | |
140 | ||
141 | i2s->dma_capture = &s3c64xx_i2s_pcm_stereo_in[pdev->id]; | |
142 | i2s->dma_playback = &s3c64xx_i2s_pcm_stereo_out[pdev->id]; | |
143 | ||
144 | i2s->iis_cclk = clk_get(dev, "audio-bus"); | |
145 | if (IS_ERR(i2s->iis_cclk)) { | |
146 | dev_err(dev, "failed to get audio-bus"); | |
147 | iounmap(i2s->regs); | |
148 | return -ENODEV; | |
149 | } | |
150 | ||
151 | /* configure GPIO for i2s port */ | |
152 | switch (pdev->id) { | |
153 | case 0: | |
154 | s3c_gpio_cfgpin(S3C64XX_GPD(0), S3C64XX_GPD0_I2S0_CLK); | |
155 | s3c_gpio_cfgpin(S3C64XX_GPD(1), S3C64XX_GPD1_I2S0_CDCLK); | |
156 | s3c_gpio_cfgpin(S3C64XX_GPD(2), S3C64XX_GPD2_I2S0_LRCLK); | |
157 | s3c_gpio_cfgpin(S3C64XX_GPD(3), S3C64XX_GPD3_I2S0_DI); | |
158 | s3c_gpio_cfgpin(S3C64XX_GPD(4), S3C64XX_GPD4_I2S0_D0); | |
159 | break; | |
160 | case 1: | |
161 | s3c_gpio_cfgpin(S3C64XX_GPE(0), S3C64XX_GPE0_I2S1_CLK); | |
162 | s3c_gpio_cfgpin(S3C64XX_GPE(1), S3C64XX_GPE1_I2S1_CDCLK); | |
163 | s3c_gpio_cfgpin(S3C64XX_GPE(2), S3C64XX_GPE2_I2S1_LRCLK); | |
164 | s3c_gpio_cfgpin(S3C64XX_GPE(3), S3C64XX_GPE3_I2S1_DI); | |
165 | s3c_gpio_cfgpin(S3C64XX_GPE(4), S3C64XX_GPE4_I2S1_D0); | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | ||
172 | #define S3C64XX_I2S_RATES \ | |
173 | (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ | |
174 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
175 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | |
176 | ||
177 | #define S3C64XX_I2S_FMTS \ | |
178 | (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE) | |
179 | ||
180 | struct snd_soc_dai s3c64xx_i2s_dai = { | |
181 | .name = "s3c64xx-i2s", | |
182 | .id = 0, | |
183 | .probe = s3c64xx_i2s_probe, | |
184 | .playback = { | |
185 | .channels_min = 2, | |
186 | .channels_max = 2, | |
187 | .rates = S3C64XX_I2S_RATES, | |
188 | .formats = S3C64XX_I2S_FMTS, | |
189 | }, | |
190 | .capture = { | |
191 | .channels_min = 2, | |
192 | .channels_max = 2, | |
193 | .rates = S3C64XX_I2S_RATES, | |
194 | .formats = S3C64XX_I2S_FMTS, | |
195 | }, | |
196 | .ops = { | |
197 | .set_sysclk = s3c64xx_i2s_set_sysclk, | |
198 | }, | |
199 | }; | |
200 | EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai); | |
201 | ||
202 | static int __init s3c64xx_i2s_init(void) | |
203 | { | |
204 | return s3c_i2sv2_register_dai(&s3c64xx_i2s_dai); | |
205 | } | |
206 | module_init(s3c64xx_i2s_init); | |
207 | ||
208 | static void __exit s3c64xx_i2s_exit(void) | |
209 | { | |
210 | snd_soc_unregister_dai(&s3c64xx_i2s_dai); | |
211 | } | |
212 | module_exit(s3c64xx_i2s_exit); | |
213 | ||
214 | /* Module information */ | |
215 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
216 | MODULE_DESCRIPTION("S3C64XX I2S SoC Interface"); | |
217 | MODULE_LICENSE("GPL"); | |
218 | ||
219 | ||
220 |