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_format(params)) {
41 case SNDRV_PCM_FORMAT_U8:
42 case SNDRV_PCM_FORMAT_S8:
43 bfs = 16;
44 break;
45 case SNDRV_PCM_FORMAT_U16_LE:
46 case SNDRV_PCM_FORMAT_S16_LE:
47 bfs = 32;
48 break;
49 default:
50 return -EINVAL;
51 }
52
53 /* The Fvco for WM8580 PLLs must fall within [90,100]MHz.
54 * This criterion can't be met if we request PLL output
55 * as {8000x256, 64000x256, 11025x256}Hz.
56 * As a wayout, we rather change rfs to a minimum value that
57 * results in (params_rate(params) * rfs), and itself, acceptable
58 * to both - the CODEC and the CPU.
59 */
60 switch (params_rate(params)) {
61 case 16000:
62 case 22050:
63 case 32000:
64 case 44100:
65 case 48000:
66 case 88200:
67 case 96000:
68 rfs = 256;
69 break;
70 case 64000:
71 rfs = 384;
72 break;
73 case 8000:
74 case 11025:
75 rfs = 512;
76 break;
77 default:
78 return -EINVAL;
79 }
80 pll_out = params_rate(params) * rfs;
81
82 /* Set the Codec DAI configuration */
83 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
84 | SND_SOC_DAIFMT_NB_NF
85 | SND_SOC_DAIFMT_CBM_CFM);
86 if (ret < 0)
87 return ret;
88
89 /* Set the AP DAI configuration */
90 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
91 | SND_SOC_DAIFMT_NB_NF
92 | SND_SOC_DAIFMT_CBM_CFM);
93 if (ret < 0)
94 return ret;
95
96 /* Set WM8580 to drive MCLK from its PLLA */
97 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
98 WM8580_CLKSRC_PLLA);
99 if (ret < 0)
100 return ret;
101
102 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
103 SMDK_WM8580_FREQ, pll_out);
104 if (ret < 0)
105 return ret;
106
107 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
108 pll_out, SND_SOC_CLOCK_IN);
109 if (ret < 0)
110 return ret;
111
112 return 0;
113 }
114
115 /*
116 * SMDK WM8580 DAI operations.
117 */
118 static struct snd_soc_ops smdk_ops = {
119 .hw_params = smdk_hw_params,
120 };
121
122 /* SMDK Playback widgets */
123 static const struct snd_soc_dapm_widget smdk_wm8580_dapm_widgets[] = {
124 SND_SOC_DAPM_HP("Front", NULL),
125 SND_SOC_DAPM_HP("Center+Sub", NULL),
126 SND_SOC_DAPM_HP("Rear", NULL),
127
128 SND_SOC_DAPM_MIC("MicIn", NULL),
129 SND_SOC_DAPM_LINE("LineIn", NULL),
130 };
131
132 /* SMDK-PAIFTX connections */
133 static const struct snd_soc_dapm_route smdk_wm8580_audio_map[] = {
134 /* MicIn feeds AINL */
135 {"AINL", NULL, "MicIn"},
136
137 /* LineIn feeds AINL/R */
138 {"AINL", NULL, "LineIn"},
139 {"AINR", NULL, "LineIn"},
140
141 /* Front Left/Right are fed VOUT1L/R */
142 {"Front", NULL, "VOUT1L"},
143 {"Front", NULL, "VOUT1R"},
144
145 /* Center/Sub are fed VOUT2L/R */
146 {"Center+Sub", NULL, "VOUT2L"},
147 {"Center+Sub", NULL, "VOUT2R"},
148
149 /* Rear Left/Right are fed VOUT3L/R */
150 {"Rear", NULL, "VOUT3L"},
151 {"Rear", NULL, "VOUT3R"},
152 };
153
smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime * rtd)154 static int smdk_wm8580_init_paiftx(struct snd_soc_pcm_runtime *rtd)
155 {
156 struct snd_soc_codec *codec = rtd->codec;
157 struct snd_soc_dapm_context *dapm = &codec->dapm;
158
159 /* Enabling the microphone requires the fitting of a 0R
160 * resistor to connect the line from the microphone jack.
161 */
162 snd_soc_dapm_disable_pin(dapm, "MicIn");
163
164 return 0;
165 }
166
167 enum {
168 PRI_PLAYBACK = 0,
169 PRI_CAPTURE,
170 SEC_PLAYBACK,
171 };
172
173 static struct snd_soc_dai_link smdk_dai[] = {
174 [PRI_PLAYBACK] = { /* Primary Playback i/f */
175 .name = "WM8580 PAIF RX",
176 .stream_name = "Playback",
177 .cpu_dai_name = "samsung-i2s.0",
178 .codec_dai_name = "wm8580-hifi-playback",
179 .platform_name = "samsung-audio",
180 .codec_name = "wm8580.0-001b",
181 .ops = &smdk_ops,
182 },
183 [PRI_CAPTURE] = { /* Primary Capture i/f */
184 .name = "WM8580 PAIF TX",
185 .stream_name = "Capture",
186 .cpu_dai_name = "samsung-i2s.0",
187 .codec_dai_name = "wm8580-hifi-capture",
188 .platform_name = "samsung-audio",
189 .codec_name = "wm8580.0-001b",
190 .init = smdk_wm8580_init_paiftx,
191 .ops = &smdk_ops,
192 },
193 [SEC_PLAYBACK] = { /* Sec_Fifo Playback i/f */
194 .name = "Sec_FIFO TX",
195 .stream_name = "Playback",
196 .cpu_dai_name = "samsung-i2s.x",
197 .codec_dai_name = "wm8580-hifi-playback",
198 .platform_name = "samsung-audio",
199 .codec_name = "wm8580.0-001b",
200 .ops = &smdk_ops,
201 },
202 };
203
204 static struct snd_soc_card smdk = {
205 .name = "SMDK-I2S",
206 .owner = THIS_MODULE,
207 .dai_link = smdk_dai,
208 .num_links = 2,
209
210 .dapm_widgets = smdk_wm8580_dapm_widgets,
211 .num_dapm_widgets = ARRAY_SIZE(smdk_wm8580_dapm_widgets),
212 .dapm_routes = smdk_wm8580_audio_map,
213 .num_dapm_routes = ARRAY_SIZE(smdk_wm8580_audio_map),
214 };
215
216 static struct platform_device *smdk_snd_device;
217
smdk_audio_init(void)218 static int __init smdk_audio_init(void)
219 {
220 int ret;
221 char *str;
222
223 if (machine_is_smdkc100()
224 || machine_is_smdkv210() || machine_is_smdkc110()) {
225 smdk.num_links = 3;
226 /* Secondary is at offset SAMSUNG_I2S_SECOFF from Primary */
227 str = (char *)smdk_dai[SEC_PLAYBACK].cpu_dai_name;
228 str[strlen(str) - 1] = '0' + SAMSUNG_I2S_SECOFF;
229 } else if (machine_is_smdk6410()) {
230 str = (char *)smdk_dai[PRI_PLAYBACK].cpu_dai_name;
231 str[strlen(str) - 1] = '2';
232 str = (char *)smdk_dai[PRI_CAPTURE].cpu_dai_name;
233 str[strlen(str) - 1] = '2';
234 }
235
236 smdk_snd_device = platform_device_alloc("soc-audio", -1);
237 if (!smdk_snd_device)
238 return -ENOMEM;
239
240 platform_set_drvdata(smdk_snd_device, &smdk);
241 ret = platform_device_add(smdk_snd_device);
242
243 if (ret)
244 platform_device_put(smdk_snd_device);
245
246 return ret;
247 }
248 module_init(smdk_audio_init);
249
smdk_audio_exit(void)250 static void __exit smdk_audio_exit(void)
251 {
252 platform_device_unregister(smdk_snd_device);
253 }
254 module_exit(smdk_audio_exit);
255
256 MODULE_AUTHOR("Jaswinder Singh, jassisinghbrar@gmail.com");
257 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580");
258 MODULE_LICENSE("GPL");
259