Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
5b99e6cc SG |
2 | /* |
3 | * sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based | |
4 | * ATMEL AT91SAM9G20ek board. | |
5 | * | |
6 | * Copyright (C) 2005 SAN People | |
7 | * Copyright (C) 2008 Atmel | |
8 | * | |
9 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> | |
10 | * | |
11 | * Based on ati_b1_wm8731.c by: | |
12 | * Frank Mandarino <fmandarino@endrelia.com> | |
13 | * Copyright 2006 Endrelia Technologies Inc. | |
14 | * Based on corgi.c by: | |
15 | * Copyright 2005 Wolfson Microelectronics PLC. | |
16 | * Copyright 2005 Openedhand Ltd. | |
5b99e6cc SG |
17 | */ |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/moduleparam.h> | |
5b99e6cc SG |
21 | #include <linux/kernel.h> |
22 | #include <linux/clk.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/platform_device.h> | |
5998102b | 26 | #include <linux/i2c.h> |
8aa99652 | 27 | #include <linux/of.h> |
5b99e6cc SG |
28 | |
29 | #include <linux/atmel-ssc.h> | |
30 | ||
31 | #include <sound/core.h> | |
32 | #include <sound/pcm.h> | |
33 | #include <sound/pcm_params.h> | |
34 | #include <sound/soc.h> | |
5b99e6cc | 35 | |
5b99e6cc SG |
36 | #include "../codecs/wm8731.h" |
37 | #include "atmel-pcm.h" | |
38 | #include "atmel_ssc_dai.h" | |
39 | ||
5de7f9b2 MB |
40 | #define MCLK_RATE 12000000 |
41 | ||
22df8eb4 MB |
42 | /* |
43 | * As shipped the board does not have inputs. However, it is relatively | |
44 | * straightforward to modify the board to hook them up so support is left | |
45 | * in the driver. | |
46 | */ | |
47 | #undef ENABLE_MIC_INPUT | |
48 | ||
5de7f9b2 | 49 | static struct clk *mclk; |
5b99e6cc | 50 | |
5de7f9b2 | 51 | static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card, |
d4c6005f | 52 | struct snd_soc_dapm_context *dapm, |
5de7f9b2 MB |
53 | enum snd_soc_bias_level level) |
54 | { | |
55 | static int mclk_on; | |
56 | int ret = 0; | |
57 | ||
58 | switch (level) { | |
59 | case SND_SOC_BIAS_ON: | |
60 | case SND_SOC_BIAS_PREPARE: | |
61 | if (!mclk_on) | |
62 | ret = clk_enable(mclk); | |
63 | if (ret == 0) | |
64 | mclk_on = 1; | |
65 | break; | |
66 | ||
67 | case SND_SOC_BIAS_OFF: | |
68 | case SND_SOC_BIAS_STANDBY: | |
69 | if (mclk_on) | |
70 | clk_disable(mclk); | |
71 | mclk_on = 0; | |
72 | break; | |
73 | } | |
74 | ||
75 | return ret; | |
76 | } | |
5b99e6cc SG |
77 | |
78 | static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = { | |
79 | SND_SOC_DAPM_MIC("Int Mic", NULL), | |
80 | SND_SOC_DAPM_SPK("Ext Spk", NULL), | |
81 | }; | |
82 | ||
83 | static const struct snd_soc_dapm_route intercon[] = { | |
84 | ||
a1677e39 | 85 | /* speaker connected to LHPOUT/RHPOUT */ |
5b99e6cc | 86 | {"Ext Spk", NULL, "LHPOUT"}, |
a1677e39 | 87 | {"Ext Spk", NULL, "RHPOUT"}, |
5b99e6cc SG |
88 | |
89 | /* mic is connected to Mic Jack, with WM8731 Mic Bias */ | |
90 | {"MICIN", NULL, "Mic Bias"}, | |
91 | {"Mic Bias", NULL, "Int Mic"}, | |
92 | }; | |
93 | ||
94 | /* | |
95 | * Logic for a wm8731 as connected on a at91sam9g20ek board. | |
96 | */ | |
f0fba2ad | 97 | static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd) |
5b99e6cc | 98 | { |
f0fba2ad | 99 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
edefc8f3 | 100 | struct device *dev = rtd->dev; |
96fd6d47 MB |
101 | int ret; |
102 | ||
edefc8f3 | 103 | dev_dbg(dev, "%s called\n", __func__); |
5b99e6cc | 104 | |
6bb74a72 | 105 | ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK, |
edefc8f3 | 106 | MCLK_RATE, SND_SOC_CLOCK_IN); |
96fd6d47 | 107 | if (ret < 0) { |
edefc8f3 | 108 | dev_err(dev, "Failed to set WM8731 SYSCLK: %d\n", ret); |
96fd6d47 MB |
109 | return ret; |
110 | } | |
111 | ||
b0ffe9b1 LPC |
112 | #ifndef ENABLE_MIC_INPUT |
113 | snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic"); | |
22df8eb4 MB |
114 | #endif |
115 | ||
5b99e6cc SG |
116 | return 0; |
117 | } | |
118 | ||
119 | static struct snd_soc_dai_link at91sam9g20ek_dai = { | |
120 | .name = "WM8731", | |
121 | .stream_name = "WM8731 PCM", | |
3310b57d | 122 | .cpu_dai_name = "at91rm9200_ssc.0", |
f0fba2ad | 123 | .codec_dai_name = "wm8731-hifi", |
5b99e6cc | 124 | .init = at91sam9g20ek_wm8731_init, |
3310b57d | 125 | .platform_name = "at91rm9200_ssc.0", |
99b59f3c | 126 | .codec_name = "wm8731.0-001b", |
059d3dc6 LPC |
127 | .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
128 | SND_SOC_DAIFMT_CBM_CFM, | |
5b99e6cc SG |
129 | }; |
130 | ||
87506549 | 131 | static struct snd_soc_card snd_soc_at91sam9g20ek = { |
7ee75380 | 132 | .name = "AT91SAMG20-EK", |
338d68db | 133 | .owner = THIS_MODULE, |
5b99e6cc SG |
134 | .dai_link = &at91sam9g20ek_dai, |
135 | .num_links = 1, | |
5de7f9b2 | 136 | .set_bias_level = at91sam9g20ek_set_bias_level, |
b0ffe9b1 LPC |
137 | |
138 | .dapm_widgets = at91sam9g20ek_dapm_widgets, | |
139 | .num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets), | |
140 | .dapm_routes = intercon, | |
141 | .num_dapm_routes = ARRAY_SIZE(intercon), | |
a1677e39 | 142 | .fully_routed = true, |
5b99e6cc SG |
143 | }; |
144 | ||
71d14ea6 | 145 | static int at91sam9g20ek_audio_probe(struct platform_device *pdev) |
5b99e6cc | 146 | { |
531f67e4 BS |
147 | struct device_node *np = pdev->dev.of_node; |
148 | struct device_node *codec_np, *cpu_np; | |
5de7f9b2 | 149 | struct clk *pllb; |
242b9bb8 | 150 | struct snd_soc_card *card = &snd_soc_at91sam9g20ek; |
5b99e6cc SG |
151 | int ret; |
152 | ||
531f67e4 | 153 | if (!np) { |
d7a6fe01 | 154 | return -ENODEV; |
531f67e4 | 155 | } |
40135ea0 | 156 | |
3310b57d BS |
157 | ret = atmel_ssc_set_audio(0); |
158 | if (ret) { | |
159 | dev_err(&pdev->dev, "ssc channel is not valid\n"); | |
160 | return -EINVAL; | |
161 | } | |
162 | ||
5de7f9b2 MB |
163 | /* |
164 | * Codec MCLK is supplied by PCK0 - set it up. | |
165 | */ | |
166 | mclk = clk_get(NULL, "pck0"); | |
167 | if (IS_ERR(mclk)) { | |
edefc8f3 | 168 | dev_err(&pdev->dev, "Failed to get MCLK\n"); |
5de7f9b2 MB |
169 | ret = PTR_ERR(mclk); |
170 | goto err; | |
171 | } | |
172 | ||
173 | pllb = clk_get(NULL, "pllb"); | |
b3915d1f | 174 | if (IS_ERR(pllb)) { |
edefc8f3 | 175 | dev_err(&pdev->dev, "Failed to get PLLB\n"); |
b3915d1f | 176 | ret = PTR_ERR(pllb); |
5de7f9b2 MB |
177 | goto err_mclk; |
178 | } | |
179 | ret = clk_set_parent(mclk, pllb); | |
180 | clk_put(pllb); | |
181 | if (ret != 0) { | |
edefc8f3 | 182 | dev_err(&pdev->dev, "Failed to set MCLK parent\n"); |
5de7f9b2 MB |
183 | goto err_mclk; |
184 | } | |
185 | ||
186 | clk_set_rate(mclk, MCLK_RATE); | |
187 | ||
242b9bb8 | 188 | card->dev = &pdev->dev; |
531f67e4 BS |
189 | |
190 | /* Parse device node info */ | |
d7a6fe01 AB |
191 | ret = snd_soc_of_parse_card_name(card, "atmel,model"); |
192 | if (ret) | |
193 | goto err; | |
194 | ||
195 | ret = snd_soc_of_parse_audio_routing(card, | |
196 | "atmel,audio-routing"); | |
197 | if (ret) | |
198 | goto err; | |
199 | ||
200 | /* Parse codec info */ | |
201 | at91sam9g20ek_dai.codec_name = NULL; | |
202 | codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); | |
203 | if (!codec_np) { | |
204 | dev_err(&pdev->dev, "codec info missing\n"); | |
205 | return -EINVAL; | |
206 | } | |
207 | at91sam9g20ek_dai.codec_of_node = codec_np; | |
208 | ||
209 | /* Parse dai and platform info */ | |
210 | at91sam9g20ek_dai.cpu_dai_name = NULL; | |
211 | at91sam9g20ek_dai.platform_name = NULL; | |
212 | cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); | |
213 | if (!cpu_np) { | |
214 | dev_err(&pdev->dev, "dai and pcm info missing\n"); | |
215 | return -EINVAL; | |
531f67e4 | 216 | } |
d7a6fe01 AB |
217 | at91sam9g20ek_dai.cpu_of_node = cpu_np; |
218 | at91sam9g20ek_dai.platform_of_node = cpu_np; | |
219 | ||
220 | of_node_put(codec_np); | |
221 | of_node_put(cpu_np); | |
531f67e4 | 222 | |
242b9bb8 | 223 | ret = snd_soc_register_card(card); |
5b99e6cc | 224 | if (ret) { |
edefc8f3 | 225 | dev_err(&pdev->dev, "snd_soc_register_card() failed\n"); |
5b99e6cc SG |
226 | } |
227 | ||
228 | return ret; | |
229 | ||
5de7f9b2 MB |
230 | err_mclk: |
231 | clk_put(mclk); | |
232 | mclk = NULL; | |
233 | err: | |
3310b57d | 234 | atmel_ssc_put_audio(0); |
5b99e6cc SG |
235 | return ret; |
236 | } | |
237 | ||
71d14ea6 | 238 | static int at91sam9g20ek_audio_remove(struct platform_device *pdev) |
5b99e6cc | 239 | { |
242b9bb8 BS |
240 | struct snd_soc_card *card = platform_get_drvdata(pdev); |
241 | ||
151edfc7 | 242 | clk_disable(mclk); |
5de7f9b2 | 243 | mclk = NULL; |
151edfc7 BS |
244 | snd_soc_unregister_card(card); |
245 | atmel_ssc_put_audio(0); | |
242b9bb8 BS |
246 | |
247 | return 0; | |
5b99e6cc SG |
248 | } |
249 | ||
531f67e4 BS |
250 | #ifdef CONFIG_OF |
251 | static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = { | |
252 | { .compatible = "atmel,at91sam9g20ek-wm8731-audio", }, | |
253 | { } | |
254 | }; | |
255 | MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids); | |
256 | #endif | |
257 | ||
242b9bb8 BS |
258 | static struct platform_driver at91sam9g20ek_audio_driver = { |
259 | .driver = { | |
260 | .name = "at91sam9g20ek-audio", | |
531f67e4 | 261 | .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids), |
242b9bb8 BS |
262 | }, |
263 | .probe = at91sam9g20ek_audio_probe, | |
71d14ea6 | 264 | .remove = at91sam9g20ek_audio_remove, |
242b9bb8 BS |
265 | }; |
266 | ||
267 | module_platform_driver(at91sam9g20ek_audio_driver); | |
5b99e6cc SG |
268 | |
269 | /* Module information */ | |
270 | MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); | |
271 | MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731"); | |
242b9bb8 | 272 | MODULE_ALIAS("platform:at91sam9g20ek-audio"); |
5b99e6cc | 273 | MODULE_LICENSE("GPL"); |