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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> |
8aa99652 | 40 | #include <linux/of.h> |
5b99e6cc SG |
41 | |
42 | #include <linux/atmel-ssc.h> | |
43 | ||
44 | #include <sound/core.h> | |
45 | #include <sound/pcm.h> | |
46 | #include <sound/pcm_params.h> | |
47 | #include <sound/soc.h> | |
5b99e6cc | 48 | |
5b99e6cc SG |
49 | #include "../codecs/wm8731.h" |
50 | #include "atmel-pcm.h" | |
51 | #include "atmel_ssc_dai.h" | |
52 | ||
5de7f9b2 MB |
53 | #define MCLK_RATE 12000000 |
54 | ||
22df8eb4 MB |
55 | /* |
56 | * As shipped the board does not have inputs. However, it is relatively | |
57 | * straightforward to modify the board to hook them up so support is left | |
58 | * in the driver. | |
59 | */ | |
60 | #undef ENABLE_MIC_INPUT | |
61 | ||
5de7f9b2 | 62 | static struct clk *mclk; |
5b99e6cc | 63 | |
5de7f9b2 | 64 | static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, |
d4c6005f | 65 | struct snd_soc_dapm_context *dapm, |
5de7f9b2 MB |
66 | enum snd_soc_bias_level level) |
67 | { | |
68 | static int mclk_on; | |
69 | int ret = 0; | |
70 | ||
71 | switch (level) { | |
72 | case SND_SOC_BIAS_ON: | |
73 | case SND_SOC_BIAS_PREPARE: | |
74 | if (!mclk_on) | |
75 | ret = clk_enable(mclk); | |
76 | if (ret == 0) | |
77 | mclk_on = 1; | |
78 | break; | |
79 | ||
80 | case SND_SOC_BIAS_OFF: | |
81 | case SND_SOC_BIAS_STANDBY: | |
82 | if (mclk_on) | |
83 | clk_disable(mclk); | |
84 | mclk_on = 0; | |
85 | break; | |
86 | } | |
87 | ||
88 | return ret; | |
89 | } | |
5b99e6cc SG |
90 | |
91 | static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { | |
92 | SND_SOC_DAPM_MIC("Int Mic", NULL), | |
93 | SND_SOC_DAPM_SPK("Ext Spk", NULL), | |
94 | }; | |
95 | ||
96 | static const struct snd_soc_dapm_route intercon[] = { | |
97 | ||
98 | /* speaker connected to LHPOUT */ | |
99 | {"Ext Spk", NULL, "LHPOUT"}, | |
100 | ||
101 | /* mic is connected to Mic Jack, with WM8731 Mic Bias */ | |
102 | {"MICIN", NULL, "Mic Bias"}, | |
103 | {"Mic Bias", NULL, "Int Mic"}, | |
104 | }; | |
105 | ||
106 | /* | |
107 | * Logic for a wm8731 as connected on a at91sam9g20ek board. | |
108 | */ | |
f0fba2ad | 109 | static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) |
5b99e6cc | 110 | { |
f0fba2ad LG |
111 | struct snd_soc_codec *codec = rtd->codec; |
112 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | |
ce6120cc | 113 | struct snd_soc_dapm_context *dapm = &codec->dapm; |
96fd6d47 MB |
114 | int ret; |
115 | ||
5b99e6cc SG |
116 | printk(KERN_DEBUG |
117 | "at91sam9g20ek_wm8731 " | |
118 | ": at91sam9g20ek_wm8731_init() called\n"); | |
119 | ||
6bb74a72 | 120 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, |
96fd6d47 MB |
121 | MCLK_RATE, SND_SOC_CLOCK_IN); |
122 | if (ret < 0) { | |
123 | printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret); | |
124 | return ret; | |
125 | } | |
126 | ||
5b99e6cc | 127 | /* not connected */ |
ce6120cc LG |
128 | snd_soc_dapm_nc_pin(dapm, "RLINEIN"); |
129 | snd_soc_dapm_nc_pin(dapm, "LLINEIN"); | |
5b99e6cc | 130 | |
b0ffe9b1 LPC |
131 | #ifndef ENABLE_MIC_INPUT |
132 | snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); | |
22df8eb4 MB |
133 | #endif |
134 | ||
5b99e6cc SG |
135 | return 0; |
136 | } | |
137 | ||
138 | static struct snd_soc_dai_link at91sam9g20ek_dai = { | |
139 | .name = "WM8731", | |
140 | .stream_name = "WM8731 PCM", | |
3310b57d | 141 | .cpu_dai_name = "at91rm9200_ssc.0", |
f0fba2ad | 142 | .codec_dai_name = "wm8731-hifi", |
5b99e6cc | 143 | .init = at91sam9g20ek_wm8731_init, |
3310b57d | 144 | .platform_name = "at91rm9200_ssc.0", |
99b59f3c | 145 | .codec_name = "wm8731.0-001b", |
059d3dc6 LPC |
146 | .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
147 | SND_SOC_DAIFMT_CBM_CFM, | |
5b99e6cc SG |
148 | }; |
149 | ||
87506549 | 150 | static struct snd_soc_card snd_soc_at91sam9g20ek = { |
7ee75380 | 151 | .name = "AT91SAMG20-EK", |
338d68db | 152 | .owner = THIS_MODULE, |
5b99e6cc SG |
153 | .dai_link = &at91sam9g20ek_dai, |
154 | .num_links = 1, | |
5de7f9b2 | 155 | .set_bias_level = at91sam9g20ek_set_bias_level, |
b0ffe9b1 LPC |
156 | |
157 | .dapm_widgets = at91sam9g20ek_dapm_widgets, | |
158 | .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), | |
159 | .dapm_routes = intercon, | |
160 | .num_dapm_routes = ARRAY_SIZE(intercon), | |
5b99e6cc SG |
161 | }; |
162 | ||
71d14ea6 | 163 | static int at91sam9g20ek_audio_probe(struct platform_device *pdev) |
5b99e6cc | 164 | { |
531f67e4 BS |
165 | struct device_node *np = pdev->dev.of_node; |
166 | struct device_node *codec_np, *cpu_np; | |
5de7f9b2 | 167 | struct clk *pllb; |
242b9bb8 | 168 | struct snd_soc_card *card = &snd_soc_at91sam9g20ek; |
5b99e6cc SG |
169 | int ret; |
170 | ||
531f67e4 | 171 | if (!np) { |
d7a6fe01 | 172 | return -ENODEV; |
531f67e4 | 173 | } |
40135ea0 | 174 | |
3310b57d BS |
175 | ret = atmel_ssc_set_audio(0); |
176 | if (ret) { | |
177 | dev_err(&pdev->dev, "ssc channel is not valid\n"); | |
178 | return -EINVAL; | |
179 | } | |
180 | ||
5de7f9b2 MB |
181 | /* |
182 | * Codec MCLK is supplied by PCK0 - set it up. | |
183 | */ | |
184 | mclk = clk_get(NULL, "pck0"); | |
185 | if (IS_ERR(mclk)) { | |
186 | printk(KERN_ERR "ASoC: Failed to get MCLK\n"); | |
187 | ret = PTR_ERR(mclk); | |
188 | goto err; | |
189 | } | |
190 | ||
191 | pllb = clk_get(NULL, "pllb"); | |
b3915d1f | 192 | if (IS_ERR(pllb)) { |
5de7f9b2 | 193 | printk(KERN_ERR "ASoC: Failed to get PLLB\n"); |
b3915d1f | 194 | ret = PTR_ERR(pllb); |
5de7f9b2 MB |
195 | goto err_mclk; |
196 | } | |
197 | ret = clk_set_parent(mclk, pllb); | |
198 | clk_put(pllb); | |
199 | if (ret != 0) { | |
200 | printk(KERN_ERR "ASoC: Failed to set MCLK parent\n"); | |
201 | goto err_mclk; | |
202 | } | |
203 | ||
204 | clk_set_rate(mclk, MCLK_RATE); | |
205 | ||
242b9bb8 | 206 | card->dev = &pdev->dev; |
531f67e4 BS |
207 | |
208 | /* Parse device node info */ | |
d7a6fe01 AB |
209 | ret = snd_soc_of_parse_card_name(card, "atmel,model"); |
210 | if (ret) | |
211 | goto err; | |
212 | ||
213 | ret = snd_soc_of_parse_audio_routing(card, | |
214 | "atmel,audio-routing"); | |
215 | if (ret) | |
216 | goto err; | |
217 | ||
218 | /* Parse codec info */ | |
219 | at91sam9g20ek_dai.codec_name = NULL; | |
220 | codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); | |
221 | if (!codec_np) { | |
222 | dev_err(&pdev->dev, "codec info missing\n"); | |
223 | return -EINVAL; | |
224 | } | |
225 | at91sam9g20ek_dai.codec_of_node = codec_np; | |
226 | ||
227 | /* Parse dai and platform info */ | |
228 | at91sam9g20ek_dai.cpu_dai_name = NULL; | |
229 | at91sam9g20ek_dai.platform_name = NULL; | |
230 | cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); | |
231 | if (!cpu_np) { | |
232 | dev_err(&pdev->dev, "dai and pcm info missing\n"); | |
233 | return -EINVAL; | |
531f67e4 | 234 | } |
d7a6fe01 AB |
235 | at91sam9g20ek_dai.cpu_of_node = cpu_np; |
236 | at91sam9g20ek_dai.platform_of_node = cpu_np; | |
237 | ||
238 | of_node_put(codec_np); | |
239 | of_node_put(cpu_np); | |
531f67e4 | 240 | |
242b9bb8 | 241 | ret = snd_soc_register_card(card); |
5b99e6cc | 242 | if (ret) { |
242b9bb8 | 243 | printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n"); |
5b99e6cc SG |
244 | } |
245 | ||
246 | return ret; | |
247 | ||
5de7f9b2 MB |
248 | err_mclk: |
249 | clk_put(mclk); | |
250 | mclk = NULL; | |
251 | err: | |
3310b57d | 252 | atmel_ssc_put_audio(0); |
5b99e6cc SG |
253 | return ret; |
254 | } | |
255 | ||
71d14ea6 | 256 | static int at91sam9g20ek_audio_remove(struct platform_device *pdev) |
5b99e6cc | 257 | { |
242b9bb8 BS |
258 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
259 | ||
151edfc7 | 260 | clk_disable(mclk); |
5de7f9b2 | 261 | mclk = NULL; |
151edfc7 BS |
262 | snd_soc_unregister_card(card); |
263 | atmel_ssc_put_audio(0); | |
242b9bb8 BS |
264 | |
265 | return 0; | |
5b99e6cc SG |
266 | } |
267 | ||
531f67e4 BS |
268 | #ifdef CONFIG_OF |
269 | static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { | |
270 | { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, | |
271 | { } | |
272 | }; | |
273 | MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); | |
274 | #endif | |
275 | ||
242b9bb8 BS |
276 | static struct platform_driver at91sam9g20ek_audio_driver = { |
277 | .driver = { | |
278 | .name = "at91sam9g20ek-audio", | |
531f67e4 | 279 | .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), |
242b9bb8 BS |
280 | }, |
281 | .probe = at91sam9g20ek_audio_probe, | |
71d14ea6 | 282 | .remove = at91sam9g20ek_audio_remove, |
242b9bb8 BS |
283 | }; |
284 | ||
285 | module_platform_driver(at91sam9g20ek_audio_driver); | |
5b99e6cc SG |
286 | |
287 | /* Module information */ | |
288 | MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); | |
289 | MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); | |
242b9bb8 | 290 | MODULE_ALIAS("platform:at91sam9g20ek-audio"); |
5b99e6cc | 291 | MODULE_LICENSE("GPL"); |