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-rw-r--r--sound/soc/blackfin/bf5xx-ssm2602.c186
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1/*
2 * File: sound/soc/blackfin/bf5xx-ssm2602.c
3 * Author: Cliff Cai <Cliff.Cai@analog.com>
4 *
5 * Created: Tue June 06 2008
6 * Description: board driver for SSM2602 sound chip
7 *
8 * Modified:
9 * Copyright 2008 Analog Devices Inc.
10 *
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, see the file COPYING, or write
25 * to the Free Software Foundation, Inc.,
26 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29#include <linux/module.h>
30#include <linux/moduleparam.h>
31#include <linux/device.h>
32
33#include <sound/core.h>
34#include <sound/pcm.h>
35#include <sound/soc.h>
36#include <sound/soc-dapm.h>
37#include <sound/pcm_params.h>
38
39#include <asm/dma.h>
40#include <asm/portmux.h>
41#include <linux/gpio.h>
42#include "../codecs/ssm2602.h"
43#include "bf5xx-sport.h"
44#include "bf5xx-i2s-pcm.h"
45#include "bf5xx-i2s.h"
46
47static struct snd_soc_machine bf5xx_ssm2602;
48
49static int bf5xx_ssm2602_startup(struct snd_pcm_substream *substream)
50{
51 struct snd_soc_pcm_runtime *rtd = substream->private_data;
52 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
53
54 pr_debug("%s enter\n", __func__);
55 cpu_dai->private_data = sport_handle;
56 return 0;
57}
58
59static int bf5xx_ssm2602_hw_params(struct snd_pcm_substream *substream,
60 struct snd_pcm_hw_params *params)
61{
62 struct snd_soc_pcm_runtime *rtd = substream->private_data;
63 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
64 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
65 unsigned int clk = 0;
66 int ret = 0;
67
68 pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
69 params_format(params));
70 /*
71 * If you are using a crystal source which frequency is not 12MHz
72 * then modify the below case statement with frequency of the crystal.
73 *
74 * If you are using the SPORT to generate clocking then this is
75 * where to do it.
76 */
77
78 switch (params_rate(params)) {
79 case 8000:
80 case 16000:
81 case 48000:
82 case 96000:
83 case 11025:
84 case 22050:
85 case 44100:
86 clk = 12000000;
87 break;
88 }
89
90 /*
91 * CODEC is master for BCLK and LRC in this configuration.
92 */
93
94 /* set codec DAI configuration */
95 ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
96 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
97 if (ret < 0)
98 return ret;
99 /* set cpu DAI configuration */
100 ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
101 SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
102 if (ret < 0)
103 return ret;
104
105 ret = codec_dai->dai_ops.set_sysclk(codec_dai, SSM2602_SYSCLK, clk,
106 SND_SOC_CLOCK_IN);
107 if (ret < 0)
108 return ret;
109
110 return 0;
111}
112
113static struct snd_soc_ops bf5xx_ssm2602_ops = {
114 .startup = bf5xx_ssm2602_startup,
115 .hw_params = bf5xx_ssm2602_hw_params,
116};
117
118static struct snd_soc_dai_link bf5xx_ssm2602_dai = {
119 .name = "ssm2602",
120 .stream_name = "SSM2602",
121 .cpu_dai = &bf5xx_i2s_dai,
122 .codec_dai = &ssm2602_dai,
123 .ops = &bf5xx_ssm2602_ops,
124};
125
126/*
127 * SSM2602 2 wire address is determined by CSB
128 * state during powerup.
129 * low = 0x1a
130 * high = 0x1b
131 */
132
133static struct ssm2602_setup_data bf5xx_ssm2602_setup = {
134 .i2c_bus = 0,
135 .i2c_address = 0x1b,
136};
137
138static struct snd_soc_machine bf5xx_ssm2602 = {
139 .name = "bf5xx_ssm2602",
140 .dai_link = &bf5xx_ssm2602_dai,
141 .num_links = 1,
142};
143
144static struct snd_soc_device bf5xx_ssm2602_snd_devdata = {
145 .machine = &bf5xx_ssm2602,
146 .platform = &bf5xx_i2s_soc_platform,
147 .codec_dev = &soc_codec_dev_ssm2602,
148 .codec_data = &bf5xx_ssm2602_setup,
149};
150
151static struct platform_device *bf52x_ssm2602_snd_device;
152
153static int __init bf5xx_ssm2602_init(void)
154{
155 int ret;
156
157 pr_debug("%s enter\n", __func__);
158 bf52x_ssm2602_snd_device = platform_device_alloc("soc-audio", -1);
159 if (!bf52x_ssm2602_snd_device)
160 return -ENOMEM;
161
162 platform_set_drvdata(bf52x_ssm2602_snd_device,
163 &bf5xx_ssm2602_snd_devdata);
164 bf5xx_ssm2602_snd_devdata.dev = &bf52x_ssm2602_snd_device->dev;
165 ret = platform_device_add(bf52x_ssm2602_snd_device);
166
167 if (ret)
168 platform_device_put(bf52x_ssm2602_snd_device);
169
170 return ret;
171}
172
173static void __exit bf5xx_ssm2602_exit(void)
174{
175 pr_debug("%s enter\n", __func__);
176 platform_device_unregister(bf52x_ssm2602_snd_device);
177}
178
179module_init(bf5xx_ssm2602_init);
180module_exit(bf5xx_ssm2602_exit);
181
182/* Module information */
183MODULE_AUTHOR("Cliff Cai");
184MODULE_DESCRIPTION("ALSA SoC SSM2602 BF527-EZKIT");
185MODULE_LICENSE("GPL");
186