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af56b1c2 JB |
1 | /* sound/soc/s3c24xx/s3c64xx-i2s-v4.c |
2 | * | |
3 | * ALSA SoC Audio Layer - S3C64XX I2Sv4 driver | |
4 | * Copyright (c) 2010 Samsung Electronics Co. Ltd | |
5 | * Author: Jaswinder Singh <jassi.brar@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/clk.h> | |
13 | #include <linux/gpio.h> | |
14 | #include <linux/io.h> | |
15 | ||
16 | #include <sound/soc.h> | |
17 | #include <sound/pcm_params.h> | |
18 | ||
19 | #include <mach/gpio-bank-c.h> | |
20 | #include <mach/gpio-bank-h.h> | |
21 | #include <plat/gpio-cfg.h> | |
22 | ||
23 | #include <mach/map.h> | |
24 | #include <mach/dma.h> | |
25 | ||
26 | #include "s3c-dma.h" | |
27 | #include "regs-i2s-v2.h" | |
28 | #include "s3c64xx-i2s.h" | |
29 | ||
30 | static struct s3c2410_dma_client s3c64xx_dma_client_out = { | |
31 | .name = "I2Sv4 PCM Stereo out" | |
32 | }; | |
33 | ||
34 | static struct s3c2410_dma_client s3c64xx_dma_client_in = { | |
35 | .name = "I2Sv4 PCM Stereo in" | |
36 | }; | |
37 | ||
38 | static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_out; | |
39 | static struct s3c_dma_params s3c64xx_i2sv4_pcm_stereo_in; | |
40 | static struct s3c_i2sv2_info s3c64xx_i2sv4; | |
41 | ||
42 | struct snd_soc_dai s3c64xx_i2s_v4_dai; | |
43 | EXPORT_SYMBOL_GPL(s3c64xx_i2s_v4_dai); | |
44 | ||
45 | static inline struct s3c_i2sv2_info *to_info(struct snd_soc_dai *cpu_dai) | |
46 | { | |
47 | return cpu_dai->private_data; | |
48 | } | |
49 | ||
50 | static int s3c64xx_i2sv4_probe(struct platform_device *pdev, | |
51 | struct snd_soc_dai *dai) | |
52 | { | |
53 | /* configure GPIO for i2s port */ | |
54 | s3c_gpio_cfgpin(S3C64XX_GPC(4), S3C64XX_GPC4_I2S_V40_DO0); | |
55 | s3c_gpio_cfgpin(S3C64XX_GPC(5), S3C64XX_GPC5_I2S_V40_DO1); | |
56 | s3c_gpio_cfgpin(S3C64XX_GPC(7), S3C64XX_GPC7_I2S_V40_DO2); | |
57 | s3c_gpio_cfgpin(S3C64XX_GPH(6), S3C64XX_GPH6_I2S_V40_BCLK); | |
58 | s3c_gpio_cfgpin(S3C64XX_GPH(7), S3C64XX_GPH7_I2S_V40_CDCLK); | |
59 | s3c_gpio_cfgpin(S3C64XX_GPH(8), S3C64XX_GPH8_I2S_V40_LRCLK); | |
60 | s3c_gpio_cfgpin(S3C64XX_GPH(9), S3C64XX_GPH9_I2S_V40_DI); | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
65 | static int s3c_i2sv4_hw_params(struct snd_pcm_substream *substream, | |
66 | struct snd_pcm_hw_params *params, | |
67 | struct snd_soc_dai *cpu_dai) | |
68 | { | |
69 | struct s3c_i2sv2_info *i2s = to_info(cpu_dai); | |
70 | struct s3c_dma_params *dma_data; | |
71 | u32 iismod; | |
72 | ||
73 | dev_dbg(cpu_dai->dev, "Entered %s\n", __func__); | |
74 | ||
75 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
76 | dma_data = i2s->dma_playback; | |
77 | else | |
78 | dma_data = i2s->dma_capture; | |
79 | ||
80 | snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); | |
81 | ||
82 | iismod = readl(i2s->regs + S3C2412_IISMOD); | |
83 | dev_dbg(cpu_dai->dev, "%s: r: IISMOD: %x\n", __func__, iismod); | |
84 | ||
85 | iismod &= ~S3C64XX_IISMOD_BLC_MASK; | |
86 | switch (params_format(params)) { | |
87 | case SNDRV_PCM_FORMAT_S8: | |
88 | iismod |= S3C64XX_IISMOD_BLC_8BIT; | |
89 | break; | |
90 | case SNDRV_PCM_FORMAT_S16_LE: | |
91 | break; | |
92 | case SNDRV_PCM_FORMAT_S24_LE: | |
93 | iismod |= S3C64XX_IISMOD_BLC_24BIT; | |
94 | break; | |
95 | } | |
96 | ||
97 | writel(iismod, i2s->regs + S3C2412_IISMOD); | |
98 | dev_dbg(cpu_dai->dev, "%s: w: IISMOD: %x\n", __func__, iismod); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static struct snd_soc_dai_ops s3c64xx_i2sv4_dai_ops = { | |
104 | .hw_params = s3c_i2sv4_hw_params, | |
105 | }; | |
106 | ||
107 | static __devinit int s3c64xx_i2sv4_dev_probe(struct platform_device *pdev) | |
108 | { | |
109 | struct s3c_i2sv2_info *i2s; | |
110 | struct snd_soc_dai *dai; | |
111 | int ret; | |
112 | ||
113 | i2s = &s3c64xx_i2sv4; | |
114 | dai = &s3c64xx_i2s_v4_dai; | |
115 | ||
116 | if (dai->dev) { | |
117 | dev_dbg(dai->dev, "%s: \ | |
118 | I2Sv4 instance already registered!\n", __func__); | |
119 | return -EBUSY; | |
120 | } | |
121 | ||
122 | dai->dev = &pdev->dev; | |
123 | dai->name = "s3c64xx-i2s-v4"; | |
124 | dai->id = 0; | |
125 | dai->symmetric_rates = 1; | |
126 | dai->playback.channels_min = 2; | |
127 | dai->playback.channels_max = 2; | |
128 | dai->playback.rates = S3C64XX_I2S_RATES; | |
129 | dai->playback.formats = S3C64XX_I2S_FMTS; | |
130 | dai->capture.channels_min = 2; | |
131 | dai->capture.channels_max = 2; | |
132 | dai->capture.rates = S3C64XX_I2S_RATES; | |
133 | dai->capture.formats = S3C64XX_I2S_FMTS; | |
134 | dai->probe = s3c64xx_i2sv4_probe; | |
135 | dai->ops = &s3c64xx_i2sv4_dai_ops; | |
136 | ||
137 | i2s->feature |= S3C_FEATURE_CDCLKCON; | |
138 | ||
139 | i2s->dma_capture = &s3c64xx_i2sv4_pcm_stereo_in; | |
140 | i2s->dma_playback = &s3c64xx_i2sv4_pcm_stereo_out; | |
141 | ||
142 | i2s->dma_capture->channel = DMACH_HSI_I2SV40_RX; | |
143 | i2s->dma_capture->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISRXD; | |
144 | i2s->dma_playback->channel = DMACH_HSI_I2SV40_TX; | |
145 | i2s->dma_playback->dma_addr = S3C64XX_PA_IISV4 + S3C2412_IISTXD; | |
146 | ||
147 | i2s->dma_capture->client = &s3c64xx_dma_client_in; | |
148 | i2s->dma_capture->dma_size = 4; | |
149 | i2s->dma_playback->client = &s3c64xx_dma_client_out; | |
150 | i2s->dma_playback->dma_size = 4; | |
151 | ||
152 | i2s->iis_cclk = clk_get(&pdev->dev, "audio-bus"); | |
153 | if (IS_ERR(i2s->iis_cclk)) { | |
154 | dev_err(&pdev->dev, "failed to get audio-bus\n"); | |
155 | ret = PTR_ERR(i2s->iis_cclk); | |
156 | goto err; | |
157 | } | |
158 | ||
159 | clk_enable(i2s->iis_cclk); | |
160 | ||
161 | ret = s3c_i2sv2_probe(pdev, dai, i2s, 0); | |
162 | if (ret) | |
163 | goto err_clk; | |
164 | ||
165 | ret = s3c_i2sv2_register_dai(dai); | |
166 | if (ret != 0) | |
167 | goto err_i2sv2; | |
168 | ||
169 | return 0; | |
170 | ||
171 | err_i2sv2: | |
172 | /* Not implemented for I2Sv2 core yet */ | |
173 | err_clk: | |
174 | clk_put(i2s->iis_cclk); | |
175 | err: | |
176 | return ret; | |
177 | } | |
178 | ||
179 | static __devexit int s3c64xx_i2sv4_dev_remove(struct platform_device *pdev) | |
180 | { | |
181 | dev_err(&pdev->dev, "Device removal not yet supported\n"); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static struct platform_driver s3c64xx_i2sv4_driver = { | |
186 | .probe = s3c64xx_i2sv4_dev_probe, | |
187 | .remove = s3c64xx_i2sv4_dev_remove, | |
188 | .driver = { | |
189 | .name = "s3c64xx-iis-v4", | |
190 | .owner = THIS_MODULE, | |
191 | }, | |
192 | }; | |
193 | ||
194 | static int __init s3c64xx_i2sv4_init(void) | |
195 | { | |
196 | return platform_driver_register(&s3c64xx_i2sv4_driver); | |
197 | } | |
198 | module_init(s3c64xx_i2sv4_init); | |
199 | ||
200 | static void __exit s3c64xx_i2sv4_exit(void) | |
201 | { | |
202 | platform_driver_unregister(&s3c64xx_i2sv4_driver); | |
203 | } | |
204 | module_exit(s3c64xx_i2sv4_exit); | |
205 | ||
206 | /* Module information */ | |
207 | MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>"); | |
208 | MODULE_DESCRIPTION("S3C64XX I2Sv4 SoC Interface"); | |
209 | MODULE_LICENSE("GPL"); |