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 <asm/mach-types.h>
18
19 #include "../codecs/wm8580.h"
20 #include "i2s.h"
21
22 /*
23 * Default CFG switch settings to use this driver:
24 *
25 * SMDK6410: Set CFG1 1-3 Off, CFG2 1-4 On
26 */
27
28 /* SMDK has a 12MHZ crystal attached to WM8580 */
29 #define SMDK_WM8580_FREQ 12000000
30
smdk_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)31 static int smdk_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
33 {
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 unsigned int pll_out;
37 int bfs, rfs, ret;
38
39 switch (params_width(params)) {
40 case 8:
41 bfs = 16;
42 break;
43 case 16:
44 bfs = 32;
45 break;
46 default:
47 return -EINVAL;
48 }
49
50 /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
51 * This criterion can't be met if we request PLL output
52 * as {8000x256, 64000x256, 11025x256}Hz.
53 * As a wayout, we rather change rfs to a minimum value that
54 * results in (params_rate(params) * rfs), and itself, acceptable
55 * to both - the CODEC and the CPU.
56 */
57 switch (params_rate(params)) {
58 case 16000:
59 case 22050:
60 case 32000:
61 case 44100:
62 case 48000:
63 case 88200:
64 case 96000:
65 rfs = 256;
66 break;
67 case 64000:
68 rfs = 384;
69 break;
70 case 8000:
71 case 11025:
72 rfs = 512;
73 break;
74 default:
75 return -EINVAL;
76 }
77 pll_out = params_rate(params) * rfs;
78
79 /* Set WM8580 to drive MCLK from its PLLA */
80 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
81 WM8580_CLKSRC_PLLA);
82 if (ret < 0)
83 return ret;
84
85 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
86 SMDK_WM8580_FREQ, pll_out);
87 if (ret < 0)
88 return ret;
89
90 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
91 pll_out, SND_SOC_CLOCK_IN);
92 if (ret < 0)
93 return ret;
94
95 return 0;
96 }
97
98 /*
99 * SMDK WM8580 DAI operations.
100 */
101 static struct snd_soc_ops smdk_ops = {
102 .hw_params = smdk_hw_params,
103 };
104
105 /* SMDK Playback widgets */
106 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
107 SND_SOC_DAPM_HP("Front", NULL),
108 SND_SOC_DAPM_HP("Center+Sub", NULL),
109 SND_SOC_DAPM_HP("Rear", NULL),
110
111 SND_SOC_DAPM_MIC("MicIn", NULL),
112 SND_SOC_DAPM_LINE("LineIn", NULL),
113 };
114
115 /* SMDK-PAIFTX connections */
116 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
117 /* MicIn feeds AINL */
118 {"AINL", NULL, "MicIn"},
119
120 /* LineIn feeds AINL/R */
121 {"AINL", NULL, "LineIn"},
122 {"AINR", NULL, "LineIn"},
123
124 /* Front Left/Right are fed VOUT1L/R */
125 {"Front", NULL, "VOUT1L"},
126 {"Front", NULL, "VOUT1R"},
127
128 /* Center/Sub are fed VOUT2L/R */
129 {"Center+Sub", NULL, "VOUT2L"},
130 {"Center+Sub", NULL, "VOUT2R"},
131
132 /* Rear Left/Right are fed VOUT3L/R */
133 {"Rear", NULL, "VOUT3L"},
134 {"Rear", NULL, "VOUT3R"},
135 };
136
smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime * rtd)137 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
138 {
139 /* Enabling the microphone requires the fitting of a 0R
140 * resistor to connect the line from the microphone jack.
141 */
142 snd_soc_dapm_disable_pin(&rtd->card->dapm, "MicIn");
143
144 return 0;
145 }
146
147 enum {
148 PRI_PLAYBACK = 0,
149 PRI_CAPTURE,
150 SEC_PLAYBACK,
151 };
152
153 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | \
154 SND_SOC_DAIFMT_CBM_CFM)
155
156 static struct snd_soc_dai_link smdk_dai[] = {
157 [PRI_PLAYBACK] = { /* Primary Playback i/f */
158 .name = "WM8580 PAIF RX",
159 .stream_name = "Playback",
160 .cpu_dai_name = "samsung-i2s.0",
161 .codec_dai_name = "wm8580-hifi-playback",
162 .platform_name = "samsung-i2s.0",
163 .codec_name = "wm8580.0-001b",
164 .dai_fmt = SMDK_DAI_FMT,
165 .ops = &smdk_ops,
166 },
167 [PRI_CAPTURE] = { /* Primary Capture i/f */
168 .name = "WM8580 PAIF TX",
169 .stream_name = "Capture",
170 .cpu_dai_name = "samsung-i2s.0",
171 .codec_dai_name = "wm8580-hifi-capture",
172 .platform_name = "samsung-i2s.0",
173 .codec_name = "wm8580.0-001b",
174 .dai_fmt = SMDK_DAI_FMT,
175 .init = smdk_wm8580_init_paiftx,
176 .ops = &smdk_ops,
177 },
178 [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
179 .name = "Sec_FIFO TX",
180 .stream_name = "Playback",
181 .cpu_dai_name = "samsung-i2s-sec",
182 .codec_dai_name = "wm8580-hifi-playback",
183 .platform_name = "samsung-i2s-sec",
184 .codec_name = "wm8580.0-001b",
185 .dai_fmt = SMDK_DAI_FMT,
186 .ops = &smdk_ops,
187 },
188 };
189
190 static struct snd_soc_card smdk = {
191 .name = "SMDK-I2S",
192 .owner = THIS_MODULE,
193 .dai_link = smdk_dai,
194 .num_links = 2,
195
196 .dapm_widgets = smdk_wm8580_dapm_widgets,
197 .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
198 .dapm_routes = smdk_wm8580_audio_map,
199 .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
200 };
201
202 static struct platform_device *smdk_snd_device;
203
smdk_audio_init(void)204 static int __init smdk_audio_init(void)
205 {
206 int ret;
207 char *str;
208
209 if (machine_is_smdkc100()
210 || machine_is_smdkv210() || machine_is_smdkc110()) {
211 smdk.num_links = 3;
212 } else if (machine_is_smdk6410()) {
213 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
214 str[strlen(str) - 1] = '2';
215 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
216 str[strlen(str) - 1] = '2';
217 }
218
219 smdk_snd_device = platform_device_alloc("soc-audio", -1);
220 if (!smdk_snd_device)
221 return -ENOMEM;
222
223 platform_set_drvdata(smdk_snd_device, &smdk);
224 ret = platform_device_add(smdk_snd_device);
225
226 if (ret)
227 platform_device_put(smdk_snd_device);
228
229 return ret;
230 }
231 module_init(smdk_audio_init);
232
smdk_audio_exit(void)233 static void __exit smdk_audio_exit(void)
234 {
235 platform_device_unregister(smdk_snd_device);
236 }
237 module_exit(smdk_audio_exit);
238
239 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
240 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
241 MODULE_LICENSE("GPL");
242