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raumfeld.c
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1 /*
2  * raumfeld_audio.c -- SoC audio for Raumfeld audio devices
3  *
4  * Copyright (c) 2009 Daniel Mack <[email protected]>
5  *
6  * based on code from:
7  *
8  * Wolfson Microelectronics PLC.
9  * Openedhand Ltd.
10  * Liam Girdwood <[email protected]>
11  * Richard Purdie <[email protected]>
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 
44 static void set_max9485_clk(char clk)
45 {
46  i2c_master_send(max9486_client, &clk, 1);
47 }
48 
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 */
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 
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 
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 fmt, 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  fmt = SND_SOC_DAIFMT_I2S |
116  SND_SOC_DAIFMT_NB_NF |
117  SND_SOC_DAIFMT_CBS_CFS;
118 
119  /* setup the CODEC DAI */
120  ret = snd_soc_dai_set_fmt(codec_dai, fmt);
121  if (ret < 0)
122  return ret;
123 
124  ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
125  if (ret < 0)
126  return ret;
127 
128  /* setup the CPU DAI */
129  ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
130  if (ret < 0)
131  return ret;
132 
133  ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
134  if (ret < 0)
135  return ret;
136 
137  ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
138  if (ret < 0)
139  return ret;
140 
141  ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
142  if (ret < 0)
143  return ret;
144 
145  return 0;
146 }
147 
148 static struct snd_soc_ops raumfeld_cs4270_ops = {
149  .startup = raumfeld_cs4270_startup,
150  .shutdown = raumfeld_cs4270_shutdown,
151  .hw_params = raumfeld_cs4270_hw_params,
152 };
153 
154 static int raumfeld_analog_suspend(struct snd_soc_card *card)
155 {
156  raumfeld_enable_audio(false);
157  return 0;
158 }
159 
160 static int raumfeld_analog_resume(struct snd_soc_card *card)
161 {
162  raumfeld_enable_audio(true);
163  return 0;
164 }
165 
166 /* AK4104 */
167 
168 static int raumfeld_ak4104_hw_params(struct snd_pcm_substream *substream,
169  struct snd_pcm_hw_params *params)
170 {
171  struct snd_soc_pcm_runtime *rtd = substream->private_data;
172  struct snd_soc_dai *codec_dai = rtd->codec_dai;
173  struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
174  int fmt, ret = 0, clk = 0;
175 
176  switch (params_rate(params)) {
177  case 44100:
178  set_max9485_clk(MAX9485_MCLK_FREQ_112896);
179  clk = 11289600;
180  break;
181  case 48000:
182  set_max9485_clk(MAX9485_MCLK_FREQ_122880);
183  clk = 12288000;
184  break;
185  case 88200:
186  set_max9485_clk(MAX9485_MCLK_FREQ_225792);
187  clk = 22579200;
188  break;
189  case 96000:
190  set_max9485_clk(MAX9485_MCLK_FREQ_245760);
191  clk = 24576000;
192  break;
193  default:
194  return -EINVAL;
195  }
196 
197  fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
198 
199  /* setup the CODEC DAI */
200  ret = snd_soc_dai_set_fmt(codec_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
201  if (ret < 0)
202  return ret;
203 
204  /* setup the CPU DAI */
205  ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
206  if (ret < 0)
207  return ret;
208 
209  ret = snd_soc_dai_set_fmt(cpu_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
210  if (ret < 0)
211  return ret;
212 
213  ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
214  if (ret < 0)
215  return ret;
216 
217  ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
218  if (ret < 0)
219  return ret;
220 
221  return 0;
222 }
223 
224 static struct snd_soc_ops raumfeld_ak4104_ops = {
225  .hw_params = raumfeld_ak4104_hw_params,
226 };
227 
228 #define DAI_LINK_CS4270 \
229 { \
230  .name = "CS4270", \
231  .stream_name = "CS4270", \
232  .cpu_dai_name = "pxa-ssp-dai.0", \
233  .platform_name = "pxa-pcm-audio", \
234  .codec_dai_name = "cs4270-hifi", \
235  .codec_name = "cs4270.0-0048", \
236  .ops = &raumfeld_cs4270_ops, \
237 }
238 
239 #define DAI_LINK_AK4104 \
240 { \
241  .name = "ak4104", \
242  .stream_name = "Playback", \
243  .cpu_dai_name = "pxa-ssp-dai.1", \
244  .codec_dai_name = "ak4104-hifi", \
245  .platform_name = "pxa-pcm-audio", \
246  .ops = &raumfeld_ak4104_ops, \
247  .codec_name = "spi0.0", \
248 }
249 
250 static struct snd_soc_dai_link snd_soc_raumfeld_connector_dai[] =
251 {
252  DAI_LINK_CS4270,
253  DAI_LINK_AK4104,
254 };
255 
256 static struct snd_soc_dai_link snd_soc_raumfeld_speaker_dai[] =
257 {
258  DAI_LINK_CS4270,
259 };
260 
261 static struct snd_soc_card snd_soc_raumfeld_connector = {
262  .name = "Raumfeld Connector",
263  .owner = THIS_MODULE,
264  .dai_link = snd_soc_raumfeld_connector_dai,
265  .num_links = ARRAY_SIZE(snd_soc_raumfeld_connector_dai),
266  .suspend_post = raumfeld_analog_suspend,
267  .resume_pre = raumfeld_analog_resume,
268 };
269 
270 static struct snd_soc_card snd_soc_raumfeld_speaker = {
271  .name = "Raumfeld Speaker",
272  .owner = THIS_MODULE,
273  .dai_link = snd_soc_raumfeld_speaker_dai,
274  .num_links = ARRAY_SIZE(snd_soc_raumfeld_speaker_dai),
275  .suspend_post = raumfeld_analog_suspend,
276  .resume_pre = raumfeld_analog_resume,
277 };
278 
279 static struct platform_device *raumfeld_audio_device;
280 
281 static int __init raumfeld_audio_init(void)
282 {
283  int ret;
284 
285  if (!machine_is_raumfeld_speaker() &&
286  !machine_is_raumfeld_connector())
287  return 0;
288 
289  max9486_client = i2c_new_device(i2c_get_adapter(0),
290  &max9486_hwmon_info);
291 
292  if (!max9486_client)
293  return -ENOMEM;
294 
295  set_max9485_clk(MAX9485_MCLK_FREQ_122880);
296 
297  /* Register analog device */
298  raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
299  if (!raumfeld_audio_device)
300  return -ENOMEM;
301 
302  if (machine_is_raumfeld_speaker())
303  platform_set_drvdata(raumfeld_audio_device,
304  &snd_soc_raumfeld_speaker);
305 
306  if (machine_is_raumfeld_connector())
307  platform_set_drvdata(raumfeld_audio_device,
308  &snd_soc_raumfeld_connector);
309 
310  ret = platform_device_add(raumfeld_audio_device);
311  if (ret < 0) {
312  platform_device_put(raumfeld_audio_device);
313  return ret;
314  }
315 
316  raumfeld_enable_audio(true);
317  return 0;
318 }
319 
320 static void __exit raumfeld_audio_exit(void)
321 {
322  raumfeld_enable_audio(false);
323 
324  platform_device_unregister(raumfeld_audio_device);
325 
326  i2c_unregister_device(max9486_client);
327 
328  gpio_free(GPIO_MCLK_RESET);
329  gpio_free(GPIO_CODEC_RESET);
330  gpio_free(GPIO_SPDIF_RESET);
331 }
332 
333 module_init(raumfeld_audio_init);
334 module_exit(raumfeld_audio_exit);
335 
336 /* Module information */
337 MODULE_AUTHOR("Daniel Mack <[email protected]>");
338 MODULE_DESCRIPTION("Raumfeld audio SoC");
339 MODULE_LICENSE("GPL");
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