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5b99e6cc SG |
1 | /* |
2 | * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based | |
3 | * ATMEL AT91SAM9G20ek board. | |
4 | * | |
5 | * Copyright (C) 2005 SAN People | |
6 | * Copyright (C) 2008 Atmel | |
7 | * | |
8 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> | |
9 | * | |
10 | * Based on ati_b1_wm8731.c by: | |
11 | * Frank Mandarino <fmandarino@endrelia.com> | |
12 | * Copyright 2006 Endrelia Technologies Inc. | |
13 | * Based on corgi.c by: | |
14 | * Copyright 2005 Wolfson Microelectronics PLC. | |
15 | * Copyright 2005 Openedhand Ltd. | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or modify | |
18 | * it under the terms of the GNU General Public License as published by | |
19 | * the Free Software Foundation; either version 2 of the License, or | |
20 | * (at your option) any later version. | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
30 | */ | |
31 | ||
32 | #include <linux/module.h> | |
33 | #include <linux/moduleparam.h> | |
5b99e6cc SG |
34 | #include <linux/kernel.h> |
35 | #include <linux/clk.h> | |
36 | #include <linux/timer.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/platform_device.h> | |
5998102b | 39 | #include <linux/i2c.h> |
5b99e6cc SG |
40 | |
41 | #include <linux/atmel-ssc.h> | |
42 | ||
43 | #include <sound/core.h> | |
44 | #include <sound/pcm.h> | |
45 | #include <sound/pcm_params.h> | |
46 | #include <sound/soc.h> | |
47 | #include <sound/soc-dapm.h> | |
48 | ||
40135ea0 | 49 | #include <asm/mach-types.h> |
5b99e6cc SG |
50 | #include <mach/hardware.h> |
51 | #include <mach/gpio.h> | |
52 | ||
53 | #include "../codecs/wm8731.h" | |
54 | #include "atmel-pcm.h" | |
55 | #include "atmel_ssc_dai.h" | |
56 | ||
5de7f9b2 MB |
57 | #define MCLK_RATE 12000000 |
58 | ||
22df8eb4 MB |
59 | /* |
60 | * As shipped the board does not have inputs. However, it is relatively | |
61 | * straightforward to modify the board to hook them up so support is left | |
62 | * in the driver. | |
63 | */ | |
64 | #undef ENABLE_MIC_INPUT | |
65 | ||
5de7f9b2 | 66 | static struct clk *mclk; |
5b99e6cc | 67 | |
5b99e6cc SG |
68 | static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream, |
69 | struct snd_pcm_hw_params *params) | |
70 | { | |
71 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
72 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
73 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
5b99e6cc SG |
74 | int ret; |
75 | ||
5b99e6cc SG |
76 | /* set codec DAI configuration */ |
77 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
2a01e5f3 | 78 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); |
5b99e6cc SG |
79 | if (ret < 0) |
80 | return ret; | |
81 | ||
82 | /* set cpu DAI configuration */ | |
83 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
2a01e5f3 | 84 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); |
5b99e6cc SG |
85 | if (ret < 0) |
86 | return ret; | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static struct snd_soc_ops at91sam9g20ek_ops = { | |
5b99e6cc | 92 | .hw_params = at91sam9g20ek_hw_params, |
5b99e6cc SG |
93 | }; |
94 | ||
5de7f9b2 MB |
95 | static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, |
96 | enum snd_soc_bias_level level) | |
97 | { | |
98 | static int mclk_on; | |
99 | int ret = 0; | |
100 | ||
101 | switch (level) { | |
102 | case SND_SOC_BIAS_ON: | |
103 | case SND_SOC_BIAS_PREPARE: | |
104 | if (!mclk_on) | |
105 | ret = clk_enable(mclk); | |
106 | if (ret == 0) | |
107 | mclk_on = 1; | |
108 | break; | |
109 | ||
110 | case SND_SOC_BIAS_OFF: | |
111 | case SND_SOC_BIAS_STANDBY: | |
112 | if (mclk_on) | |
113 | clk_disable(mclk); | |
114 | mclk_on = 0; | |
115 | break; | |
116 | } | |
117 | ||
118 | return ret; | |
119 | } | |
5b99e6cc SG |
120 | |
121 | static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { | |
122 | SND_SOC_DAPM_MIC("Int Mic", NULL), | |
123 | SND_SOC_DAPM_SPK("Ext Spk", NULL), | |
124 | }; | |
125 | ||
126 | static const struct snd_soc_dapm_route intercon[] = { | |
127 | ||
128 | /* speaker connected to LHPOUT */ | |
129 | {"Ext Spk", NULL, "LHPOUT"}, | |
130 | ||
131 | /* mic is connected to Mic Jack, with WM8731 Mic Bias */ | |
132 | {"MICIN", NULL, "Mic Bias"}, | |
133 | {"Mic Bias", NULL, "Int Mic"}, | |
134 | }; | |
135 | ||
136 | /* | |
137 | * Logic for a wm8731 as connected on a at91sam9g20ek board. | |
138 | */ | |
139 | static int at91sam9g20ek_wm8731_init(struct snd_soc_codec *codec) | |
140 | { | |
96fd6d47 MB |
141 | struct snd_soc_dai *codec_dai = &codec->dai[0]; |
142 | int ret; | |
143 | ||
5b99e6cc SG |
144 | printk(KERN_DEBUG |
145 | "at91sam9g20ek_wm8731 " | |
146 | ": at91sam9g20ek_wm8731_init() called\n"); | |
147 | ||
96fd6d47 MB |
148 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK, |
149 | MCLK_RATE, SND_SOC_CLOCK_IN); | |
150 | if (ret < 0) { | |
151 | printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret); | |
152 | return ret; | |
153 | } | |
154 | ||
5b99e6cc SG |
155 | /* Add specific widgets */ |
156 | snd_soc_dapm_new_controls(codec, at91sam9g20ek_dapm_widgets, | |
157 | ARRAY_SIZE(at91sam9g20ek_dapm_widgets)); | |
158 | /* Set up specific audio path interconnects */ | |
159 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
160 | ||
161 | /* not connected */ | |
8c0bad7f MB |
162 | snd_soc_dapm_nc_pin(codec, "RLINEIN"); |
163 | snd_soc_dapm_nc_pin(codec, "LLINEIN"); | |
5b99e6cc | 164 | |
22df8eb4 | 165 | #ifdef ENABLE_MIC_INPUT |
5b99e6cc | 166 | snd_soc_dapm_enable_pin(codec, "Int Mic"); |
22df8eb4 MB |
167 | #else |
168 | snd_soc_dapm_nc_pin(codec, "Int Mic"); | |
169 | #endif | |
170 | ||
171 | /* always connected */ | |
5b99e6cc SG |
172 | snd_soc_dapm_enable_pin(codec, "Ext Spk"); |
173 | ||
174 | snd_soc_dapm_sync(codec); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static struct snd_soc_dai_link at91sam9g20ek_dai = { | |
180 | .name = "WM8731", | |
181 | .stream_name = "WM8731 PCM", | |
182 | .cpu_dai = &atmel_ssc_dai[0], | |
183 | .codec_dai = &wm8731_dai, | |
184 | .init = at91sam9g20ek_wm8731_init, | |
185 | .ops = &at91sam9g20ek_ops, | |
186 | }; | |
187 | ||
87506549 | 188 | static struct snd_soc_card snd_soc_at91sam9g20ek = { |
7ee75380 | 189 | .name = "AT91SAMG20-EK", |
87689d56 | 190 | .platform = &atmel_soc_platform, |
5b99e6cc SG |
191 | .dai_link = &at91sam9g20ek_dai, |
192 | .num_links = 1, | |
5de7f9b2 | 193 | .set_bias_level = at91sam9g20ek_set_bias_level, |
5b99e6cc SG |
194 | }; |
195 | ||
5b99e6cc | 196 | static struct snd_soc_device at91sam9g20ek_snd_devdata = { |
87506549 | 197 | .card = &snd_soc_at91sam9g20ek, |
5b99e6cc | 198 | .codec_dev = &soc_codec_dev_wm8731, |
5b99e6cc SG |
199 | }; |
200 | ||
201 | static struct platform_device *at91sam9g20ek_snd_device; | |
202 | ||
203 | static int __init at91sam9g20ek_init(void) | |
204 | { | |
205 | struct atmel_ssc_info *ssc_p = at91sam9g20ek_dai.cpu_dai->private_data; | |
206 | struct ssc_device *ssc = NULL; | |
5de7f9b2 | 207 | struct clk *pllb; |
5b99e6cc SG |
208 | int ret; |
209 | ||
69d2c2ae | 210 | if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc())) |
40135ea0 MB |
211 | return -ENODEV; |
212 | ||
5de7f9b2 MB |
213 | /* |
214 | * Codec MCLK is supplied by PCK0 - set it up. | |
215 | */ | |
216 | mclk = clk_get(NULL, "pck0"); | |
217 | if (IS_ERR(mclk)) { | |
218 | printk(KERN_ERR "ASoC: Failed to get MCLK\n"); | |
219 | ret = PTR_ERR(mclk); | |
220 | goto err; | |
221 | } | |
222 | ||
223 | pllb = clk_get(NULL, "pllb"); | |
224 | if (IS_ERR(mclk)) { | |
225 | printk(KERN_ERR "ASoC: Failed to get PLLB\n"); | |
226 | ret = PTR_ERR(mclk); | |
227 | goto err_mclk; | |
228 | } | |
229 | ret = clk_set_parent(mclk, pllb); | |
230 | clk_put(pllb); | |
231 | if (ret != 0) { | |
232 | printk(KERN_ERR "ASoC: Failed to set MCLK parent\n"); | |
233 | goto err_mclk; | |
234 | } | |
235 | ||
236 | clk_set_rate(mclk, MCLK_RATE); | |
237 | ||
5b99e6cc SG |
238 | /* |
239 | * Request SSC device | |
240 | */ | |
241 | ssc = ssc_request(0); | |
242 | if (IS_ERR(ssc)) { | |
d6943541 | 243 | printk(KERN_ERR "ASoC: Failed to request SSC 0\n"); |
5b99e6cc SG |
244 | ret = PTR_ERR(ssc); |
245 | ssc = NULL; | |
246 | goto err_ssc; | |
247 | } | |
248 | ssc_p->ssc = ssc; | |
249 | ||
250 | at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1); | |
251 | if (!at91sam9g20ek_snd_device) { | |
d6943541 | 252 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); |
5b99e6cc SG |
253 | ret = -ENOMEM; |
254 | } | |
255 | ||
256 | platform_set_drvdata(at91sam9g20ek_snd_device, | |
257 | &at91sam9g20ek_snd_devdata); | |
258 | at91sam9g20ek_snd_devdata.dev = &at91sam9g20ek_snd_device->dev; | |
259 | ||
260 | ret = platform_device_add(at91sam9g20ek_snd_device); | |
261 | if (ret) { | |
d6943541 | 262 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); |
5b99e6cc SG |
263 | platform_device_put(at91sam9g20ek_snd_device); |
264 | } | |
265 | ||
266 | return ret; | |
267 | ||
268 | err_ssc: | |
5998102b MB |
269 | ssc_free(ssc); |
270 | ssc_p->ssc = NULL; | |
5de7f9b2 MB |
271 | err_mclk: |
272 | clk_put(mclk); | |
273 | mclk = NULL; | |
274 | err: | |
5b99e6cc SG |
275 | return ret; |
276 | } | |
277 | ||
278 | static void __exit at91sam9g20ek_exit(void) | |
279 | { | |
280 | struct atmel_ssc_info *ssc_p = at91sam9g20ek_dai.cpu_dai->private_data; | |
281 | struct ssc_device *ssc; | |
282 | ||
283 | if (ssc_p != NULL) { | |
284 | ssc = ssc_p->ssc; | |
285 | if (ssc != NULL) | |
286 | ssc_free(ssc); | |
287 | ssc_p->ssc = NULL; | |
288 | } | |
289 | ||
290 | platform_device_unregister(at91sam9g20ek_snd_device); | |
291 | at91sam9g20ek_snd_device = NULL; | |
5de7f9b2 MB |
292 | clk_put(mclk); |
293 | mclk = NULL; | |
5b99e6cc SG |
294 | } |
295 | ||
296 | module_init(at91sam9g20ek_init); | |
297 | module_exit(at91sam9g20ek_exit); | |
298 | ||
299 | /* Module information */ | |
300 | MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); | |
301 | MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); | |
302 | MODULE_LICENSE("GPL"); |