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9f5b64b7 GL |
1 | /* |
2 | * ALSA SoC driver for Migo-R | |
3 | * | |
4 | * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
f4fd58d6 | 11 | #include <linux/clkdev.h> |
9f5b64b7 GL |
12 | #include <linux/device.h> |
13 | #include <linux/firmware.h> | |
14 | #include <linux/module.h> | |
15 | ||
16 | #include <asm/clock.h> | |
17 | ||
18 | #include <cpu/sh7722.h> | |
19 | ||
20 | #include <sound/core.h> | |
21 | #include <sound/pcm.h> | |
22 | #include <sound/soc.h> | |
9f5b64b7 GL |
23 | |
24 | #include "../codecs/wm8978.h" | |
25 | #include "siu.h" | |
26 | ||
27 | /* Default 8000Hz sampling frequency */ | |
28 | static unsigned long codec_freq = 8000 * 512; | |
29 | ||
30 | static unsigned int use_count; | |
31 | ||
32 | /* External clock, sourced from the codec at the SIUMCKB pin */ | |
33 | static unsigned long siumckb_recalc(struct clk *clk) | |
34 | { | |
35 | return codec_freq; | |
36 | } | |
37 | ||
c8587193 | 38 | static struct sh_clk_ops siumckb_clk_ops = { |
9f5b64b7 GL |
39 | .recalc = siumckb_recalc, |
40 | }; | |
41 | ||
42 | static struct clk siumckb_clk = { | |
9f5b64b7 GL |
43 | .ops = &siumckb_clk_ops, |
44 | .rate = 0, /* initialised at run-time */ | |
45 | }; | |
46 | ||
cbfa5184 GL |
47 | static struct clk_lookup *siumckb_lookup; |
48 | ||
9f5b64b7 GL |
49 | static int migor_hw_params(struct snd_pcm_substream *substream, |
50 | struct snd_pcm_hw_params *params) | |
51 | { | |
52 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 53 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
9f5b64b7 GL |
54 | int ret; |
55 | unsigned int rate = params_rate(params); | |
56 | ||
57 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 13000000, | |
58 | SND_SOC_CLOCK_IN); | |
59 | if (ret < 0) | |
60 | return ret; | |
61 | ||
9f5b64b7 GL |
62 | ret = snd_soc_dai_set_clkdiv(codec_dai, WM8978_OPCLKRATE, rate * 512); |
63 | if (ret < 0) | |
64 | return ret; | |
65 | ||
66 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_NB_IF | | |
67 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS); | |
68 | if (ret < 0) | |
69 | return ret; | |
70 | ||
f0fba2ad | 71 | ret = snd_soc_dai_set_fmt(rtd->cpu_dai, SND_SOC_DAIFMT_NB_IF | |
9f5b64b7 GL |
72 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS); |
73 | if (ret < 0) | |
74 | return ret; | |
75 | ||
76 | codec_freq = rate * 512; | |
77 | /* | |
78 | * This propagates the parent frequency change to children and | |
79 | * recalculates the frequency table | |
80 | */ | |
81 | clk_set_rate(&siumckb_clk, codec_freq); | |
82 | dev_dbg(codec_dai->dev, "%s: configure %luHz\n", __func__, codec_freq); | |
83 | ||
f0fba2ad | 84 | ret = snd_soc_dai_set_sysclk(rtd->cpu_dai, SIU_CLKB_EXT, |
9f5b64b7 GL |
85 | codec_freq / 2, SND_SOC_CLOCK_IN); |
86 | ||
87 | if (!ret) | |
88 | use_count++; | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
93 | static int migor_hw_free(struct snd_pcm_substream *substream) | |
94 | { | |
95 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 96 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
9f5b64b7 GL |
97 | |
98 | if (use_count) { | |
99 | use_count--; | |
100 | ||
101 | if (!use_count) | |
102 | snd_soc_dai_set_sysclk(codec_dai, WM8978_PLL, 0, | |
103 | SND_SOC_CLOCK_IN); | |
104 | } else { | |
105 | dev_dbg(codec_dai->dev, "Unbalanced hw_free!\n"); | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static struct snd_soc_ops migor_dai_ops = { | |
112 | .hw_params = migor_hw_params, | |
113 | .hw_free = migor_hw_free, | |
114 | }; | |
115 | ||
116 | static const struct snd_soc_dapm_widget migor_dapm_widgets[] = { | |
117 | SND_SOC_DAPM_HP("Headphone", NULL), | |
118 | SND_SOC_DAPM_MIC("Onboard Microphone", NULL), | |
119 | SND_SOC_DAPM_MIC("External Microphone", NULL), | |
120 | }; | |
121 | ||
122 | static const struct snd_soc_dapm_route audio_map[] = { | |
123 | /* Headphone output connected to LHP/RHP, enable OUT4 for VMID */ | |
124 | { "Headphone", NULL, "OUT4 VMID" }, | |
125 | { "OUT4 VMID", NULL, "LHP" }, | |
126 | { "OUT4 VMID", NULL, "RHP" }, | |
127 | ||
128 | /* On-board microphone */ | |
129 | { "RMICN", NULL, "Mic Bias" }, | |
130 | { "RMICP", NULL, "Mic Bias" }, | |
131 | { "Mic Bias", NULL, "Onboard Microphone" }, | |
132 | ||
133 | /* External microphone */ | |
134 | { "LMICN", NULL, "Mic Bias" }, | |
135 | { "LMICP", NULL, "Mic Bias" }, | |
136 | { "Mic Bias", NULL, "External Microphone" }, | |
137 | }; | |
138 | ||
f0fba2ad | 139 | static int migor_dai_init(struct snd_soc_pcm_runtime *rtd) |
9f5b64b7 | 140 | { |
f0fba2ad | 141 | struct snd_soc_codec *codec = rtd->codec; |
ce6120cc | 142 | struct snd_soc_dapm_context *dapm = &codec->dapm; |
f0fba2ad | 143 | |
ce6120cc | 144 | snd_soc_dapm_new_controls(dapm, migor_dapm_widgets, |
9f5b64b7 GL |
145 | ARRAY_SIZE(migor_dapm_widgets)); |
146 | ||
ce6120cc | 147 | snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); |
9f5b64b7 GL |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
152 | /* migor digital audio interface glue - connects codec <--> CPU */ | |
153 | static struct snd_soc_dai_link migor_dai = { | |
154 | .name = "wm8978", | |
155 | .stream_name = "WM8978", | |
f0fba2ad LG |
156 | .cpu_dai_name = "siu-i2s-dai", |
157 | .codec_dai_name = "wm8978-hifi", | |
158 | .platform_name = "siu-pcm-audio", | |
5250a503 | 159 | .codec_name = "wm8978.0-001a", |
9f5b64b7 GL |
160 | .ops = &migor_dai_ops, |
161 | .init = migor_dai_init, | |
162 | }; | |
163 | ||
164 | /* migor audio machine driver */ | |
165 | static struct snd_soc_card snd_soc_migor = { | |
166 | .name = "Migo-R", | |
4a7042e5 | 167 | .owner = THIS_MODULE, |
9f5b64b7 GL |
168 | .dai_link = &migor_dai, |
169 | .num_links = 1, | |
170 | }; | |
171 | ||
9f5b64b7 GL |
172 | static struct platform_device *migor_snd_device; |
173 | ||
174 | static int __init migor_init(void) | |
175 | { | |
176 | int ret; | |
177 | ||
178 | ret = clk_register(&siumckb_clk); | |
179 | if (ret < 0) | |
180 | return ret; | |
181 | ||
cbfa5184 GL |
182 | siumckb_lookup = clkdev_alloc(&siumckb_clk, "siumckb_clk", NULL); |
183 | if (!siumckb_lookup) { | |
184 | ret = -ENOMEM; | |
185 | goto eclkdevalloc; | |
186 | } | |
187 | clkdev_add(siumckb_lookup); | |
188 | ||
9f5b64b7 GL |
189 | /* Port number used on this machine: port B */ |
190 | migor_snd_device = platform_device_alloc("soc-audio", 1); | |
191 | if (!migor_snd_device) { | |
192 | ret = -ENOMEM; | |
193 | goto epdevalloc; | |
194 | } | |
195 | ||
f0fba2ad | 196 | platform_set_drvdata(migor_snd_device, &snd_soc_migor); |
9f5b64b7 GL |
197 | |
198 | ret = platform_device_add(migor_snd_device); | |
199 | if (ret) | |
200 | goto epdevadd; | |
201 | ||
202 | return 0; | |
203 | ||
204 | epdevadd: | |
205 | platform_device_put(migor_snd_device); | |
206 | epdevalloc: | |
cbfa5184 GL |
207 | clkdev_drop(siumckb_lookup); |
208 | eclkdevalloc: | |
9f5b64b7 GL |
209 | clk_unregister(&siumckb_clk); |
210 | return ret; | |
211 | } | |
212 | ||
213 | static void __exit migor_exit(void) | |
214 | { | |
cbfa5184 | 215 | clkdev_drop(siumckb_lookup); |
9f5b64b7 GL |
216 | clk_unregister(&siumckb_clk); |
217 | platform_device_unregister(migor_snd_device); | |
218 | } | |
219 | ||
220 | module_init(migor_init); | |
221 | module_exit(migor_exit); | |
222 | ||
223 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
224 | MODULE_DESCRIPTION("ALSA SoC Migor"); | |
225 | MODULE_LICENSE("GPL v2"); |