2 * raumfeld_audio.c -- SoC audio for Raumfeld audio devices
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
8 * Wolfson Microelectronics PLC.
10 * Liam Girdwood <lrg@slimlogic.co.uk>
11 * Richard Purdie <richard@openedhand.com>
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/delay.h>
22 #include <linux/gpio.h>
23 #include <sound/pcm.h>
24 #include <sound/soc.h>
25 #include <sound/soc-dapm.h>
27 #include <asm/mach-types.h>
31 #define GPIO_SPDIF_RESET (38)
32 #define GPIO_MCLK_RESET (111)
33 #define GPIO_CODEC_RESET (120)
35 static struct i2c_client *max9486_client;
36 static struct i2c_board_info max9486_hwmon_info = {
37 I2C_BOARD_INFO("max9485", 0x63),
40 #define MAX9485_MCLK_FREQ_112896 0x22
41 #define MAX9485_MCLK_FREQ_122880 0x23
42 #define MAX9485_MCLK_FREQ_225792 0x32
43 #define MAX9485_MCLK_FREQ_245760 0x33
45 static void set_max9485_clk(char clk)
47 i2c_master_send(max9486_client, &clk, 1);
50 static void raumfeld_enable_audio(bool en)
53 gpio_set_value(GPIO_MCLK_RESET, 1);
55 /* wait some time to let the clocks become stable */
58 gpio_set_value(GPIO_SPDIF_RESET, 1);
59 gpio_set_value(GPIO_CODEC_RESET, 1);
61 gpio_set_value(GPIO_MCLK_RESET, 0);
62 gpio_set_value(GPIO_SPDIF_RESET, 0);
63 gpio_set_value(GPIO_CODEC_RESET, 0);
68 static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
70 struct snd_soc_pcm_runtime *rtd = substream->private_data;
71 struct snd_soc_dai *codec_dai = rtd->codec_dai;
73 /* set freq to 0 to enable all possible codec sample rates */
74 return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
77 static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
79 struct snd_soc_pcm_runtime *rtd = substream->private_data;
80 struct snd_soc_dai *codec_dai = rtd->codec_dai;
82 /* set freq to 0 to enable all possible codec sample rates */
83 snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
86 static int raumfeld_cs4270_hw_params(struct snd_pcm_substream *substream,
87 struct snd_pcm_hw_params *params)
89 struct snd_soc_pcm_runtime *rtd = substream->private_data;
90 struct snd_soc_dai *codec_dai = rtd->codec_dai;
91 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
92 unsigned int fmt, clk = 0;
95 switch (params_rate(params)) {
97 set_max9485_clk(MAX9485_MCLK_FREQ_112896);
101 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
105 set_max9485_clk(MAX9485_MCLK_FREQ_225792);
109 set_max9485_clk(MAX9485_MCLK_FREQ_245760);
116 fmt = SND_SOC_DAIFMT_I2S |
117 SND_SOC_DAIFMT_NB_NF |
118 SND_SOC_DAIFMT_CBS_CFS;
120 /* setup the CODEC DAI */
121 ret = snd_soc_dai_set_fmt(codec_dai, fmt);
125 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
129 /* setup the CPU DAI */
130 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
134 ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
138 ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
142 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
149 static struct snd_soc_ops raumfeld_cs4270_ops = {
150 .startup = raumfeld_cs4270_startup,
151 .shutdown = raumfeld_cs4270_shutdown,
152 .hw_params = raumfeld_cs4270_hw_params,
155 static int raumfeld_line_suspend(struct platform_device *pdev, pm_message_t state)
157 raumfeld_enable_audio(false);
161 static int raumfeld_line_resume(struct platform_device *pdev)
163 raumfeld_enable_audio(true);
169 static int raumfeld_ak4104_hw_params(struct snd_pcm_substream *substream,
170 struct snd_pcm_hw_params *params)
172 struct snd_soc_pcm_runtime *rtd = substream->private_data;
173 struct snd_soc_dai *codec_dai = rtd->codec_dai;
174 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
175 int fmt, ret = 0, clk = 0;
177 switch (params_rate(params)) {
179 set_max9485_clk(MAX9485_MCLK_FREQ_112896);
183 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
187 set_max9485_clk(MAX9485_MCLK_FREQ_225792);
191 set_max9485_clk(MAX9485_MCLK_FREQ_245760);
198 fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
200 /* setup the CODEC DAI */
201 ret = snd_soc_dai_set_fmt(codec_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
205 /* setup the CPU DAI */
206 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
210 ret = snd_soc_dai_set_fmt(cpu_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
214 ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
218 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
225 static struct snd_soc_ops raumfeld_ak4104_ops = {
226 .hw_params = raumfeld_ak4104_hw_params,
229 static struct snd_soc_dai_link raumfeld_dai[] = {
232 .stream_name = "Playback",
233 .cpu_dai_name = "pxa-ssp-dai.1",
234 .codec_dai_name = "ak4104-hifi",
235 .platform_name = "pxa-pcm-audio",
236 .ops = &raumfeld_ak4104_ops,
237 .codec_name = "ak4104-codec.0",
241 .stream_name = "CS4270",
242 .cpu_dai_name = "pxa-ssp-dai.0",
243 .platform_name = "pxa-pcm-audio",
244 .codec_dai_name = "cs4270-hifi",
245 .codec_name = "cs4270-codec.0-0048",
246 .ops = &raumfeld_cs4270_ops,
249 static struct snd_soc_card snd_soc_raumfeld = {
251 .dai_link = raumfeld_dai,
252 .suspend_post = raumfeld_line_suspend,
253 .resume_pre = raumfeld_line_resume,
254 .num_links = ARRAY_SIZE(raumfeld_dai),
257 static struct platform_device *raumfeld_audio_device;
259 static int __init raumfeld_audio_init(void)
263 if (!machine_is_raumfeld_speaker() &&
264 !machine_is_raumfeld_connector())
267 max9486_client = i2c_new_device(i2c_get_adapter(0),
268 &max9486_hwmon_info);
273 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
275 /* Register LINE and SPDIF */
276 raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
277 if (!raumfeld_audio_device)
280 platform_set_drvdata(raumfeld_audio_device,
282 ret = platform_device_add(raumfeld_audio_device);
284 /* no S/PDIF on Speakers */
285 if (machine_is_raumfeld_speaker())
288 raumfeld_enable_audio(true);
293 static void __exit raumfeld_audio_exit(void)
295 raumfeld_enable_audio(false);
297 platform_device_unregister(raumfeld_audio_device);
299 i2c_unregister_device(max9486_client);
301 gpio_free(GPIO_MCLK_RESET);
302 gpio_free(GPIO_CODEC_RESET);
303 gpio_free(GPIO_SPDIF_RESET);
306 module_init(raumfeld_audio_init);
307 module_exit(raumfeld_audio_exit);
309 /* Module information */
310 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
311 MODULE_DESCRIPTION("Raumfeld audio SoC");
312 MODULE_LICENSE("GPL");