1 /*
2 * raumfeld_audio.c -- SoC audio for Raumfeld audio devices
3 *
4 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
5 *
6 * based on code from:
7 *
8 * Wolfson Microelectronics PLC.
9 * Openedhand Ltd.
10 * Liam Girdwood <lrg@slimlogic.co.uk>
11 * Richard Purdie <richard@openedhand.com>
12 *
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.
17 */
18
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
26 #include <asm/mach-types.h>
27
28 #include "pxa-ssp.h"
29
30 #define GPIO_SPDIF_RESET (38)
31 #define GPIO_MCLK_RESET (111)
32 #define GPIO_CODEC_RESET (120)
33
34 static struct i2c_client *max9486_client;
35 static struct i2c_board_info max9486_hwmon_info = {
36 I2C_BOARD_INFO("max9485", 0x63),
37 };
38
39 #define MAX9485_MCLK_FREQ_112896 0x22
40 #define MAX9485_MCLK_FREQ_122880 0x23
41 #define MAX9485_MCLK_FREQ_225792 0x32
42 #define MAX9485_MCLK_FREQ_245760 0x33
43
set_max9485_clk(char clk)44 static void set_max9485_clk(char clk)
45 {
46 i2c_master_send(max9486_client, &clk, 1);
47 }
48
raumfeld_enable_audio(bool en)49 static void raumfeld_enable_audio(bool en)
50 {
51 if (en) {
52 gpio_set_value(GPIO_MCLK_RESET, 1);
53
54 /* wait some time to let the clocks become stable */
55 msleep(100);
56
57 gpio_set_value(GPIO_SPDIF_RESET, 1);
58 gpio_set_value(GPIO_CODEC_RESET, 1);
59 } else {
60 gpio_set_value(GPIO_MCLK_RESET, 0);
61 gpio_set_value(GPIO_SPDIF_RESET, 0);
62 gpio_set_value(GPIO_CODEC_RESET, 0);
63 }
64 }
65
66 /* CS4270 */
raumfeld_cs4270_startup(struct snd_pcm_substream * substream)67 static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
68 {
69 struct snd_soc_pcm_runtime *rtd = substream->private_data;
70 struct snd_soc_dai *codec_dai = rtd->codec_dai;
71
72 /* set freq to 0 to enable all possible codec sample rates */
73 return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
74 }
75
raumfeld_cs4270_shutdown(struct snd_pcm_substream * substream)76 static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
77 {
78 struct snd_soc_pcm_runtime *rtd = substream->private_data;
79 struct snd_soc_dai *codec_dai = rtd->codec_dai;
80
81 /* set freq to 0 to enable all possible codec sample rates */
82 snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
83 }
84
raumfeld_cs4270_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)85 static int raumfeld_cs4270_hw_params(struct snd_pcm_substream *substream,
86 struct snd_pcm_hw_params *params)
87 {
88 struct snd_soc_pcm_runtime *rtd = substream->private_data;
89 struct snd_soc_dai *codec_dai = rtd->codec_dai;
90 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
91 unsigned int clk = 0;
92 int ret = 0;
93
94 switch (params_rate(params)) {
95 case 44100:
96 set_max9485_clk(MAX9485_MCLK_FREQ_112896);
97 clk = 11289600;
98 break;
99 case 48000:
100 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
101 clk = 12288000;
102 break;
103 case 88200:
104 set_max9485_clk(MAX9485_MCLK_FREQ_225792);
105 clk = 22579200;
106 break;
107 case 96000:
108 set_max9485_clk(MAX9485_MCLK_FREQ_245760);
109 clk = 24576000;
110 break;
111 default:
112 return -EINVAL;
113 }
114
115 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
116 if (ret < 0)
117 return ret;
118
119 /* setup the CPU DAI */
120 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
121 if (ret < 0)
122 return ret;
123
124 ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
125 if (ret < 0)
126 return ret;
127
128 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
129 if (ret < 0)
130 return ret;
131
132 return 0;
133 }
134
135 static struct snd_soc_ops raumfeld_cs4270_ops = {
136 .startup = raumfeld_cs4270_startup,
137 .shutdown = raumfeld_cs4270_shutdown,
138 .hw_params = raumfeld_cs4270_hw_params,
139 };
140
raumfeld_analog_suspend(struct snd_soc_card * card)141 static int raumfeld_analog_suspend(struct snd_soc_card *card)
142 {
143 raumfeld_enable_audio(false);
144 return 0;
145 }
146
raumfeld_analog_resume(struct snd_soc_card * card)147 static int raumfeld_analog_resume(struct snd_soc_card *card)
148 {
149 raumfeld_enable_audio(true);
150 return 0;
151 }
152
153 /* AK4104 */
154
raumfeld_ak4104_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)155 static int raumfeld_ak4104_hw_params(struct snd_pcm_substream *substream,
156 struct snd_pcm_hw_params *params)
157 {
158 struct snd_soc_pcm_runtime *rtd = substream->private_data;
159 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
160 int ret = 0, clk = 0;
161
162 switch (params_rate(params)) {
163 case 44100:
164 set_max9485_clk(MAX9485_MCLK_FREQ_112896);
165 clk = 11289600;
166 break;
167 case 48000:
168 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
169 clk = 12288000;
170 break;
171 case 88200:
172 set_max9485_clk(MAX9485_MCLK_FREQ_225792);
173 clk = 22579200;
174 break;
175 case 96000:
176 set_max9485_clk(MAX9485_MCLK_FREQ_245760);
177 clk = 24576000;
178 break;
179 default:
180 return -EINVAL;
181 }
182
183 /* setup the CPU DAI */
184 ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
185 if (ret < 0)
186 return ret;
187
188 ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
189 if (ret < 0)
190 return ret;
191
192 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
193 if (ret < 0)
194 return ret;
195
196 return 0;
197 }
198
199 static struct snd_soc_ops raumfeld_ak4104_ops = {
200 .hw_params = raumfeld_ak4104_hw_params,
201 };
202
203 #define DAI_LINK_CS4270 \
204 { \
205 .name = "CS4270", \
206 .stream_name = "CS4270", \
207 .cpu_dai_name = "pxa-ssp-dai.0", \
208 .platform_name = "pxa-pcm-audio", \
209 .codec_dai_name = "cs4270-hifi", \
210 .codec_name = "cs4270.0-0048", \
211 .dai_fmt = SND_SOC_DAIFMT_I2S | \
212 SND_SOC_DAIFMT_NB_NF | \
213 SND_SOC_DAIFMT_CBS_CFS, \
214 .ops = &raumfeld_cs4270_ops, \
215 }
216
217 #define DAI_LINK_AK4104 \
218 { \
219 .name = "ak4104", \
220 .stream_name = "Playback", \
221 .cpu_dai_name = "pxa-ssp-dai.1", \
222 .codec_dai_name = "ak4104-hifi", \
223 .platform_name = "pxa-pcm-audio", \
224 .dai_fmt = SND_SOC_DAIFMT_I2S | \
225 SND_SOC_DAIFMT_NB_NF | \
226 SND_SOC_DAIFMT_CBS_CFS, \
227 .ops = &raumfeld_ak4104_ops, \
228 .codec_name = "spi0.0", \
229 }
230
231 static struct snd_soc_dai_link snd_soc_raumfeld_connector_dai[] =
232 {
233 DAI_LINK_CS4270,
234 DAI_LINK_AK4104,
235 };
236
237 static struct snd_soc_dai_link snd_soc_raumfeld_speaker_dai[] =
238 {
239 DAI_LINK_CS4270,
240 };
241
242 static struct snd_soc_card snd_soc_raumfeld_connector = {
243 .name = "Raumfeld Connector",
244 .owner = THIS_MODULE,
245 .dai_link = snd_soc_raumfeld_connector_dai,
246 .num_links = ARRAY_SIZE(snd_soc_raumfeld_connector_dai),
247 .suspend_post = raumfeld_analog_suspend,
248 .resume_pre = raumfeld_analog_resume,
249 };
250
251 static struct snd_soc_card snd_soc_raumfeld_speaker = {
252 .name = "Raumfeld Speaker",
253 .owner = THIS_MODULE,
254 .dai_link = snd_soc_raumfeld_speaker_dai,
255 .num_links = ARRAY_SIZE(snd_soc_raumfeld_speaker_dai),
256 .suspend_post = raumfeld_analog_suspend,
257 .resume_pre = raumfeld_analog_resume,
258 };
259
260 static struct platform_device *raumfeld_audio_device;
261
raumfeld_audio_init(void)262 static int __init raumfeld_audio_init(void)
263 {
264 int ret;
265
266 if (!machine_is_raumfeld_speaker() &&
267 !machine_is_raumfeld_connector())
268 return 0;
269
270 max9486_client = i2c_new_device(i2c_get_adapter(0),
271 &max9486_hwmon_info);
272
273 if (!max9486_client)
274 return -ENOMEM;
275
276 set_max9485_clk(MAX9485_MCLK_FREQ_122880);
277
278 /* Register analog device */
279 raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
280 if (!raumfeld_audio_device)
281 return -ENOMEM;
282
283 if (machine_is_raumfeld_speaker())
284 platform_set_drvdata(raumfeld_audio_device,
285 &snd_soc_raumfeld_speaker);
286
287 if (machine_is_raumfeld_connector())
288 platform_set_drvdata(raumfeld_audio_device,
289 &snd_soc_raumfeld_connector);
290
291 ret = platform_device_add(raumfeld_audio_device);
292 if (ret < 0) {
293 platform_device_put(raumfeld_audio_device);
294 return ret;
295 }
296
297 raumfeld_enable_audio(true);
298 return 0;
299 }
300
raumfeld_audio_exit(void)301 static void __exit raumfeld_audio_exit(void)
302 {
303 raumfeld_enable_audio(false);
304
305 platform_device_unregister(raumfeld_audio_device);
306
307 i2c_unregister_device(max9486_client);
308
309 gpio_free(GPIO_MCLK_RESET);
310 gpio_free(GPIO_CODEC_RESET);
311 gpio_free(GPIO_SPDIF_RESET);
312 }
313
314 module_init(raumfeld_audio_init);
315 module_exit(raumfeld_audio_exit);
316
317 /* Module information */
318 MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
319 MODULE_DESCRIPTION("Raumfeld audio SoC");
320 MODULE_LICENSE("GPL");
321