1 /*
2 * smdk_wm8580.c
3 *
4 * Copyright (c) 2009 Samsung Electronics Co. Ltd
5 * Author: Jaswinder Singh <jassisinghbrar@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13 #include <linux/module.h>
14 #include <sound/soc.h>
15 #include <sound/pcm_params.h>
16
17 #include "../codecs/wm8580.h"
18 #include "i2s.h"
19
20 /*
21 * Default CFG switch settings to use this driver:
22 *
23 * SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
24 */
25
26 /* SMDK has a 12MHZ crystal attached to WM8580 */
27 #define SMDK_WM8580_FREQ 12000000
28
smdk_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)29 static int smdk_hw_params(struct snd_pcm_substream *substream,
30 struct snd_pcm_hw_params *params)
31 {
32 struct snd_soc_pcm_runtime *rtd = substream->private_data;
33 struct snd_soc_dai *codec_dai = rtd->codec_dai;
34 unsigned int pll_out;
35 int rfs, ret;
36
37 switch (params_width(params)) {
38 case 8:
39 case 16:
40 break;
41 default:
42 return -EINVAL;
43 }
44
45 /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
46 * This criterion can't be met if we request PLL output
47 * as {8000x256, 64000x256, 11025x256}Hz.
48 * As a wayout, we rather change rfs to a minimum value that
49 * results in (params_rate(params) * rfs), and itself, acceptable
50 * to both - the CODEC and the CPU.
51 */
52 switch (params_rate(params)) {
53 case 16000:
54 case 22050:
55 case 32000:
56 case 44100:
57 case 48000:
58 case 88200:
59 case 96000:
60 rfs = 256;
61 break;
62 case 64000:
63 rfs = 384;
64 break;
65 case 8000:
66 case 11025:
67 rfs = 512;
68 break;
69 default:
70 return -EINVAL;
71 }
72 pll_out = params_rate(params) * rfs;
73
74 /* Set WM8580 to drive MCLK from its PLLA */
75 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
76 WM8580_CLKSRC_PLLA);
77 if (ret < 0)
78 return ret;
79
80 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
81 SMDK_WM8580_FREQ, pll_out);
82 if (ret < 0)
83 return ret;
84
85 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
86 pll_out, SND_SOC_CLOCK_IN);
87 if (ret < 0)
88 return ret;
89
90 return 0;
91 }
92
93 /*
94 * SMDK WM8580 DAI operations.
95 */
96 static struct snd_soc_ops smdk_ops = {
97 .hw_params = smdk_hw_params,
98 };
99
100 /* SMDK Playback widgets */
101 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
102 SND_SOC_DAPM_HP("Front", NULL),
103 SND_SOC_DAPM_HP("Center+Sub", NULL),
104 SND_SOC_DAPM_HP("Rear", NULL),
105
106 SND_SOC_DAPM_MIC("MicIn", NULL),
107 SND_SOC_DAPM_LINE("LineIn", NULL),
108 };
109
110 /* SMDK-PAIFTX connections */
111 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
112 /* MicIn feeds AINL */
113 {"AINL", NULL, "MicIn"},
114
115 /* LineIn feeds AINL/R */
116 {"AINL", NULL, "LineIn"},
117 {"AINR", NULL, "LineIn"},
118
119 /* Front Left/Right are fed VOUT1L/R */
120 {"Front", NULL, "VOUT1L"},
121 {"Front", NULL, "VOUT1R"},
122
123 /* Center/Sub are fed VOUT2L/R */
124 {"Center+Sub", NULL, "VOUT2L"},
125 {"Center+Sub", NULL, "VOUT2R"},
126
127 /* Rear Left/Right are fed VOUT3L/R */
128 {"Rear", NULL, "VOUT3L"},
129 {"Rear", NULL, "VOUT3R"},
130 };
131
smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime * rtd)132 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
133 {
134 /* Enabling the microphone requires the fitting of a 0R
135 * resistor to connect the line from the microphone jack.
136 */
137 snd_soc_dapm_disable_pin(&rtd->card->dapm, "MicIn");
138
139 return 0;
140 }
141
142 enum {
143 PRI_PLAYBACK = 0,
144 PRI_CAPTURE,
145 };
146
147 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
148 SND_SOC_DAIFMT_CBM_CFM)
149
150 static struct snd_soc_dai_link smdk_dai[] = {
151 [PRI_PLAYBACK] = { /* Primary Playback i/f */
152 .name = "WM8580 PAIF RX",
153 .stream_name = "Playback",
154 .cpu_dai_name = "samsung-i2s.2",
155 .codec_dai_name = "wm8580-hifi-playback",
156 .platform_name = "samsung-i2s.0",
157 .codec_name = "wm8580.0-001b",
158 .dai_fmt = SMDK_DAI_FMT,
159 .ops = &smdk_ops,
160 },
161 [PRI_CAPTURE] = { /* Primary Capture i/f */
162 .name = "WM8580 PAIF TX",
163 .stream_name = "Capture",
164 .cpu_dai_name = "samsung-i2s.2",
165 .codec_dai_name = "wm8580-hifi-capture",
166 .platform_name = "samsung-i2s.0",
167 .codec_name = "wm8580.0-001b",
168 .dai_fmt = SMDK_DAI_FMT,
169 .init = smdk_wm8580_init_paiftx,
170 .ops = &smdk_ops,
171 },
172 };
173
174 static struct snd_soc_card smdk = {
175 .name = "SMDK-I2S",
176 .owner = THIS_MODULE,
177 .dai_link = smdk_dai,
178 .num_links = ARRAY_SIZE(smdk_dai),
179
180 .dapm_widgets = smdk_wm8580_dapm_widgets,
181 .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
182 .dapm_routes = smdk_wm8580_audio_map,
183 .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
184 };
185
186 static struct platform_device *smdk_snd_device;
187
smdk_audio_init(void)188 static int __init smdk_audio_init(void)
189 {
190 int ret;
191
192 smdk_snd_device = platform_device_alloc("soc-audio", -1);
193 if (!smdk_snd_device)
194 return -ENOMEM;
195
196 platform_set_drvdata(smdk_snd_device, &smdk);
197 ret = platform_device_add(smdk_snd_device);
198
199 if (ret)
200 platform_device_put(smdk_snd_device);
201
202 return ret;
203 }
204 module_init(smdk_audio_init);
205
smdk_audio_exit(void)206 static void __exit smdk_audio_exit(void)
207 {
208 platform_device_unregister(smdk_snd_device);
209 }
210 module_exit(smdk_audio_exit);
211
212 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
213 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
214 MODULE_LICENSE("GPL");
215