Commit | Line | Data |
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5033f43c | 1 | /* sound/soc/samsung/s3c2412-i2s.c |
49646dfa BD |
2 | * |
3 | * ALSA Soc Audio Layer - S3C2412 I2S driver | |
4 | * | |
5 | * Copyright (c) 2006 Wolfson Microelectronics PLC. | |
6 | * Graeme Gregory graeme.gregory@wolfsonmicro.com | |
7 | * linux@wolfsonmicro.com | |
8 | * | |
9 | * Copyright (c) 2007, 2004-2005 Simtec Electronics | |
10 | * http://armlinux.simtec.co.uk/ | |
11 | * Ben Dooks <ben@simtec.co.uk> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify it | |
14 | * under the terms of the GNU General Public License as published by the | |
15 | * Free Software Foundation; either version 2 of the License, or (at your | |
16 | * option) any later version. | |
17 | */ | |
18 | ||
49646dfa | 19 | #include <linux/delay.h> |
ec976d6e | 20 | #include <linux/gpio.h> |
49646dfa | 21 | #include <linux/clk.h> |
8150bc88 | 22 | #include <linux/io.h> |
da155d5b | 23 | #include <linux/module.h> |
49646dfa | 24 | |
49646dfa | 25 | #include <sound/soc.h> |
0378b6ac | 26 | #include <sound/pcm_params.h> |
49646dfa | 27 | |
a09e64fb | 28 | #include <mach/dma.h> |
49646dfa | 29 | |
4b640cf3 | 30 | #include "dma.h" |
d07e7ce9 | 31 | #include "regs-i2s-v2.h" |
49646dfa BD |
32 | #include "s3c2412-i2s.h" |
33 | ||
49646dfa BD |
34 | static struct s3c2410_dma_client s3c2412_dma_client_out = { |
35 | .name = "I2S PCM Stereo out" | |
36 | }; | |
37 | ||
38 | static struct s3c2410_dma_client s3c2412_dma_client_in = { | |
39 | .name = "I2S PCM Stereo in" | |
40 | }; | |
41 | ||
faa31776 | 42 | static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = { |
49646dfa BD |
43 | .client = &s3c2412_dma_client_out, |
44 | .channel = DMACH_I2S_OUT, | |
45 | .dma_addr = S3C2410_PA_IIS + S3C2412_IISTXD, | |
46 | .dma_size = 4, | |
47 | }; | |
48 | ||
faa31776 | 49 | static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = { |
49646dfa BD |
50 | .client = &s3c2412_dma_client_in, |
51 | .channel = DMACH_I2S_IN, | |
52 | .dma_addr = S3C2410_PA_IIS + S3C2412_IISRXD, | |
53 | .dma_size = 4, | |
54 | }; | |
55 | ||
dc85447b | 56 | static struct s3c_i2sv2_info s3c2412_i2s; |
49646dfa | 57 | |
f0fba2ad | 58 | static int s3c2412_i2s_probe(struct snd_soc_dai *dai) |
49646dfa | 59 | { |
dc85447b | 60 | int ret; |
49646dfa | 61 | |
ee7d4767 | 62 | pr_debug("Entered %s\n", __func__); |
49646dfa | 63 | |
f0fba2ad | 64 | ret = s3c_i2sv2_probe(dai, &s3c2412_i2s, S3C2410_PA_IIS); |
dc85447b BD |
65 | if (ret) |
66 | return ret; | |
49646dfa | 67 | |
dc85447b BD |
68 | s3c2412_i2s.dma_capture = &s3c2412_i2s_pcm_stereo_in; |
69 | s3c2412_i2s.dma_playback = &s3c2412_i2s_pcm_stereo_out; | |
49646dfa | 70 | |
f0fba2ad | 71 | s3c2412_i2s.iis_cclk = clk_get(dai->dev, "i2sclk"); |
7803e329 | 72 | if (IS_ERR(s3c2412_i2s.iis_cclk)) { |
008bec39 | 73 | pr_err("failed to get i2sclk clock\n"); |
49646dfa | 74 | iounmap(s3c2412_i2s.regs); |
7803e329 | 75 | return PTR_ERR(s3c2412_i2s.iis_cclk); |
49646dfa BD |
76 | } |
77 | ||
dc85447b | 78 | /* Set MPLL as the source for IIS CLK */ |
49646dfa | 79 | |
dc85447b | 80 | clk_set_parent(s3c2412_i2s.iis_cclk, clk_get(NULL, "mpll")); |
49646dfa BD |
81 | clk_enable(s3c2412_i2s.iis_cclk); |
82 | ||
dc85447b | 83 | s3c2412_i2s.iis_cclk = s3c2412_i2s.iis_pclk; |
49646dfa | 84 | |
601787c2 SN |
85 | /* Configure the I2S pins (GPE0...GPE4) in correct mode */ |
86 | s3c_gpio_cfgall_range(S3C2410_GPE(0), 5, S3C_GPIO_SFN(2), | |
87 | S3C_GPIO_PULL_NONE); | |
49646dfa | 88 | |
6cab2d3d BD |
89 | return 0; |
90 | } | |
91 | ||
f0fba2ad LG |
92 | static int s3c2412_i2s_remove(struct snd_soc_dai *dai) |
93 | { | |
94 | clk_disable(s3c2412_i2s.iis_cclk); | |
95 | clk_put(s3c2412_i2s.iis_cclk); | |
96 | iounmap(s3c2412_i2s.regs); | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
9c9b1257 JB |
101 | static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream, |
102 | struct snd_pcm_hw_params *params, | |
103 | struct snd_soc_dai *cpu_dai) | |
104 | { | |
f0fba2ad | 105 | struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai); |
fd23b7de | 106 | struct s3c_dma_params *dma_data; |
9c9b1257 JB |
107 | u32 iismod; |
108 | ||
109 | pr_debug("Entered %s\n", __func__); | |
110 | ||
111 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
fd23b7de | 112 | dma_data = i2s->dma_playback; |
9c9b1257 | 113 | else |
fd23b7de DM |
114 | dma_data = i2s->dma_capture; |
115 | ||
116 | snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data); | |
9c9b1257 JB |
117 | |
118 | iismod = readl(i2s->regs + S3C2412_IISMOD); | |
119 | pr_debug("%s: r: IISMOD: %x\n", __func__, iismod); | |
120 | ||
121 | switch (params_format(params)) { | |
122 | case SNDRV_PCM_FORMAT_S8: | |
123 | iismod |= S3C2412_IISMOD_8BIT; | |
124 | break; | |
125 | case SNDRV_PCM_FORMAT_S16_LE: | |
126 | iismod &= ~S3C2412_IISMOD_8BIT; | |
127 | break; | |
128 | } | |
129 | ||
130 | writel(iismod, i2s->regs + S3C2412_IISMOD); | |
131 | pr_debug("%s: w: IISMOD: %x\n", __func__, iismod); | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
49646dfa BD |
136 | #define S3C2412_I2S_RATES \ |
137 | (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ | |
138 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
139 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000) | |
140 | ||
85e7652d | 141 | static const struct snd_soc_dai_ops s3c2412_i2s_dai_ops = { |
9c9b1257 | 142 | .hw_params = s3c2412_i2s_hw_params, |
6335d055 EM |
143 | }; |
144 | ||
f0fba2ad | 145 | static struct snd_soc_dai_driver s3c2412_i2s_dai = { |
dc85447b | 146 | .probe = s3c2412_i2s_probe, |
f0fba2ad | 147 | .remove = s3c2412_i2s_remove, |
49646dfa BD |
148 | .playback = { |
149 | .channels_min = 2, | |
150 | .channels_max = 2, | |
151 | .rates = S3C2412_I2S_RATES, | |
152 | .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, | |
153 | }, | |
154 | .capture = { | |
155 | .channels_min = 2, | |
156 | .channels_max = 2, | |
157 | .rates = S3C2412_I2S_RATES, | |
158 | .formats = SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE, | |
159 | }, | |
6335d055 | 160 | .ops = &s3c2412_i2s_dai_ops, |
49646dfa | 161 | }; |
f0fba2ad | 162 | |
fdca21ad | 163 | static int s3c2412_iis_dev_probe(struct platform_device *pdev) |
f0fba2ad | 164 | { |
a08485d8 PV |
165 | int ret = 0; |
166 | ||
167 | ret = s3c_i2sv2_register_dai(&pdev->dev, -1, &s3c2412_i2s_dai); | |
168 | if (ret) { | |
169 | pr_err("failed to register the dai\n"); | |
170 | return ret; | |
171 | } | |
172 | ||
173 | ret = asoc_dma_platform_register(&pdev->dev); | |
174 | if (ret) { | |
175 | pr_err("failed to register the DMA: %d\n", ret); | |
176 | goto err; | |
177 | } | |
178 | ||
179 | return 0; | |
180 | err: | |
181 | snd_soc_unregister_dai(&pdev->dev); | |
182 | return ret; | |
f0fba2ad LG |
183 | } |
184 | ||
fdca21ad | 185 | static int s3c2412_iis_dev_remove(struct platform_device *pdev) |
f0fba2ad | 186 | { |
a08485d8 | 187 | asoc_dma_platform_unregister(&pdev->dev); |
f0fba2ad LG |
188 | snd_soc_unregister_dai(&pdev->dev); |
189 | return 0; | |
190 | } | |
191 | ||
192 | static struct platform_driver s3c2412_iis_driver = { | |
193 | .probe = s3c2412_iis_dev_probe, | |
fdca21ad | 194 | .remove = s3c2412_iis_dev_remove, |
f0fba2ad LG |
195 | .driver = { |
196 | .name = "s3c2412-iis", | |
197 | .owner = THIS_MODULE, | |
198 | }, | |
199 | }; | |
49646dfa | 200 | |
e00c3f55 | 201 | module_platform_driver(s3c2412_iis_driver); |
3f4b783c | 202 | |
49646dfa BD |
203 | /* Module information */ |
204 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
205 | MODULE_DESCRIPTION("S3C2412 I2S SoC Interface"); | |
206 | MODULE_LICENSE("GPL"); | |
960d0697 | 207 | MODULE_ALIAS("platform:s3c2412-iis"); |