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 *cpu_dai = rtd->cpu_dai;
36 struct snd_soc_dai *codec_dai = rtd->codec_dai;
37 unsigned int pll_out;
38 int bfs, rfs, ret;
39
40 switch (params_width(params)) {
41 case 8:
42 bfs = 16;
43 break;
44 case 16:
45 bfs = 32;
46 break;
47 default:
48 return -EINVAL;
49 }
50
51 /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
52 * This criterion can't be met if we request PLL output
53 * as {8000x256, 64000x256, 11025x256}Hz.
54 * As a wayout, we rather change rfs to a minimum value that
55 * results in (params_rate(params) * rfs), and itself, acceptable
56 * to both - the CODEC and the CPU.
57 */
58 switch (params_rate(params)) {
59 case 16000:
60 case 22050:
61 case 32000:
62 case 44100:
63 case 48000:
64 case 88200:
65 case 96000:
66 rfs = 256;
67 break;
68 case 64000:
69 rfs = 384;
70 break;
71 case 8000:
72 case 11025:
73 rfs = 512;
74 break;
75 default:
76 return -EINVAL;
77 }
78 pll_out = params_rate(params) * rfs;
79
80 /* Set the Codec DAI configuration */
81 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
82 | SND_SOC_DAIFMT_NB_NF
83 | SND_SOC_DAIFMT_CBM_CFM);
84 if (ret < 0)
85 return ret;
86
87 /* Set the AP DAI configuration */
88 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
89 | SND_SOC_DAIFMT_NB_NF
90 | SND_SOC_DAIFMT_CBM_CFM);
91 if (ret < 0)
92 return ret;
93
94 /* Set WM8580 to drive MCLK from its PLLA */
95 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
96 WM8580_CLKSRC_PLLA);
97 if (ret < 0)
98 return ret;
99
100 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
101 SMDK_WM8580_FREQ, pll_out);
102 if (ret < 0)
103 return ret;
104
105 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
106 pll_out, SND_SOC_CLOCK_IN);
107 if (ret < 0)
108 return ret;
109
110 return 0;
111 }
112
113 /*
114 * SMDK WM8580 DAI operations.
115 */
116 static struct snd_soc_ops smdk_ops = {
117 .hw_params = smdk_hw_params,
118 };
119
120 /* SMDK Playback widgets */
121 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
122 SND_SOC_DAPM_HP("Front", NULL),
123 SND_SOC_DAPM_HP("Center+Sub", NULL),
124 SND_SOC_DAPM_HP("Rear", NULL),
125
126 SND_SOC_DAPM_MIC("MicIn", NULL),
127 SND_SOC_DAPM_LINE("LineIn", NULL),
128 };
129
130 /* SMDK-PAIFTX connections */
131 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
132 /* MicIn feeds AINL */
133 {"AINL", NULL, "MicIn"},
134
135 /* LineIn feeds AINL/R */
136 {"AINL", NULL, "LineIn"},
137 {"AINR", NULL, "LineIn"},
138
139 /* Front Left/Right are fed VOUT1L/R */
140 {"Front", NULL, "VOUT1L"},
141 {"Front", NULL, "VOUT1R"},
142
143 /* Center/Sub are fed VOUT2L/R */
144 {"Center+Sub", NULL, "VOUT2L"},
145 {"Center+Sub", NULL, "VOUT2R"},
146
147 /* Rear Left/Right are fed VOUT3L/R */
148 {"Rear", NULL, "VOUT3L"},
149 {"Rear", NULL, "VOUT3R"},
150 };
151
smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime * rtd)152 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
153 {
154 struct snd_soc_codec *codec = rtd->codec;
155 struct snd_soc_dapm_context *dapm = &codec->dapm;
156
157 /* Enabling the microphone requires the fitting of a 0R
158 * resistor to connect the line from the microphone jack.
159 */
160 snd_soc_dapm_disable_pin(dapm, "MicIn");
161
162 return 0;
163 }
164
165 enum {
166 PRI_PLAYBACK = 0,
167 PRI_CAPTURE,
168 SEC_PLAYBACK,
169 };
170
171 static struct snd_soc_dai_link smdk_dai[] = {
172 [PRI_PLAYBACK] = { /* Primary Playback i/f */
173 .name = "WM8580 PAIF RX",
174 .stream_name = "Playback",
175 .cpu_dai_name = "samsung-i2s.0",
176 .codec_dai_name = "wm8580-hifi-playback",
177 .platform_name = "samsung-i2s.0",
178 .codec_name = "wm8580.0-001b",
179 .ops = &smdk_ops,
180 },
181 [PRI_CAPTURE] = { /* Primary Capture i/f */
182 .name = "WM8580 PAIF TX",
183 .stream_name = "Capture",
184 .cpu_dai_name = "samsung-i2s.0",
185 .codec_dai_name = "wm8580-hifi-capture",
186 .platform_name = "samsung-i2s.0",
187 .codec_name = "wm8580.0-001b",
188 .init = smdk_wm8580_init_paiftx,
189 .ops = &smdk_ops,
190 },
191 [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
192 .name = "Sec_FIFO TX",
193 .stream_name = "Playback",
194 .cpu_dai_name = "samsung-i2s-sec",
195 .codec_dai_name = "wm8580-hifi-playback",
196 .platform_name = "samsung-i2s-sec",
197 .codec_name = "wm8580.0-001b",
198 .ops = &smdk_ops,
199 },
200 };
201
202 static struct snd_soc_card smdk = {
203 .name = "SMDK-I2S",
204 .owner = THIS_MODULE,
205 .dai_link = smdk_dai,
206 .num_links = 2,
207
208 .dapm_widgets = smdk_wm8580_dapm_widgets,
209 .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
210 .dapm_routes = smdk_wm8580_audio_map,
211 .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
212 };
213
214 static struct platform_device *smdk_snd_device;
215
smdk_audio_init(void)216 static int __init smdk_audio_init(void)
217 {
218 int ret;
219 char *str;
220
221 if (machine_is_smdkc100()
222 || machine_is_smdkv210() || machine_is_smdkc110()) {
223 smdk.num_links = 3;
224 } else if (machine_is_smdk6410()) {
225 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
226 str[strlen(str) - 1] = '2';
227 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
228 str[strlen(str) - 1] = '2';
229 }
230
231 smdk_snd_device = platform_device_alloc("soc-audio", -1);
232 if (!smdk_snd_device)
233 return -ENOMEM;
234
235 platform_set_drvdata(smdk_snd_device, &smdk);
236 ret = platform_device_add(smdk_snd_device);
237
238 if (ret)
239 platform_device_put(smdk_snd_device);
240
241 return ret;
242 }
243 module_init(smdk_audio_init);
244
smdk_audio_exit(void)245 static void __exit smdk_audio_exit(void)
246 {
247 platform_device_unregister(smdk_snd_device);
248 }
249 module_exit(smdk_audio_exit);
250
251 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
252 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
253 MODULE_LICENSE("GPL");
254