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1 | /* |
2 | * mx27vis_wm8974.c -- SoC audio for mx27vis | |
3 | * | |
4 | * Copyright 2009 Vista Silicon S.L. | |
5 | * Author: Javier Martin | |
6 | * javier.martin@vista-silicon.com | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/i2c.h> | |
19 | #include <sound/core.h> | |
20 | #include <sound/pcm.h> | |
21 | #include <sound/soc.h> | |
22 | #include <sound/soc-dapm.h> | |
23 | ||
24 | ||
25 | #include "../codecs/wm8974.h" | |
26 | #include "mx1_mx2-pcm.h" | |
27 | #include "mxc-ssi.h" | |
28 | #include <mach/gpio.h> | |
29 | #include <mach/iomux.h> | |
30 | ||
31 | #define IGNORED_ARG 0 | |
32 | ||
33 | ||
34 | static struct snd_soc_card mx27vis; | |
35 | ||
36 | /** | |
37 | * This function connects SSI1 (HPCR1) as slave to | |
38 | * SSI1 external signals (PPCR1) | |
39 | * As slave, HPCR1 must set TFSDIR and TCLKDIR as inputs from | |
40 | * port 4 | |
41 | */ | |
42 | void audmux_connect_1_4(void) | |
43 | { | |
44 | pr_debug("AUDMUX: normal operation mode\n"); | |
45 | /* Reset HPCR1 and PPCR1 */ | |
46 | ||
47 | DAM_HPCR1 = 0x00000000; | |
48 | DAM_PPCR1 = 0x00000000; | |
49 | ||
50 | /* set to synchronous */ | |
51 | DAM_HPCR1 |= AUDMUX_HPCR_SYN; | |
52 | DAM_PPCR1 |= AUDMUX_PPCR_SYN; | |
53 | ||
54 | ||
55 | /* set Rx sources 1 <--> 4 */ | |
56 | DAM_HPCR1 |= AUDMUX_HPCR_RXDSEL(3); /* port 4 */ | |
57 | DAM_PPCR1 |= AUDMUX_PPCR_RXDSEL(0); /* port 1 */ | |
58 | ||
59 | /* set Tx frame and Clock direction and source 4 --> 1 output */ | |
60 | DAM_HPCR1 |= AUDMUX_HPCR_TFSDIR | AUDMUX_HPCR_TCLKDIR; | |
61 | DAM_HPCR1 |= AUDMUX_HPCR_TFCSEL(3); /* TxDS and TxCclk from port 4 */ | |
62 | ||
63 | return; | |
64 | } | |
65 | ||
66 | static int mx27vis_hifi_hw_params(struct snd_pcm_substream *substream, | |
67 | struct snd_pcm_hw_params *params) | |
68 | { | |
69 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
70 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
71 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
72 | unsigned int pll_out = 0, bclk = 0, fmt = 0, mclk = 0; | |
73 | int ret = 0; | |
74 | ||
75 | /* | |
76 | * The WM8974 is better at generating accurate audio clocks than the | |
77 | * MX27 SSI controller, so we will use it as master when we can. | |
78 | */ | |
79 | switch (params_rate(params)) { | |
80 | case 8000: | |
81 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
82 | mclk = WM8974_MCLKDIV_12; | |
83 | pll_out = 24576000; | |
84 | break; | |
85 | case 16000: | |
86 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
87 | pll_out = 12288000; | |
88 | break; | |
89 | case 48000: | |
90 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
91 | bclk = WM8974_BCLKDIV_4; | |
92 | pll_out = 12288000; | |
93 | break; | |
94 | case 96000: | |
95 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
96 | bclk = WM8974_BCLKDIV_2; | |
97 | pll_out = 12288000; | |
98 | break; | |
99 | case 11025: | |
100 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
101 | bclk = WM8974_BCLKDIV_16; | |
102 | pll_out = 11289600; | |
103 | break; | |
104 | case 22050: | |
105 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
106 | bclk = WM8974_BCLKDIV_8; | |
107 | pll_out = 11289600; | |
108 | break; | |
109 | case 44100: | |
110 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
111 | bclk = WM8974_BCLKDIV_4; | |
112 | mclk = WM8974_MCLKDIV_2; | |
113 | pll_out = 11289600; | |
114 | break; | |
115 | case 88200: | |
116 | fmt = SND_SOC_DAIFMT_CBM_CFM; | |
117 | bclk = WM8974_BCLKDIV_2; | |
118 | pll_out = 11289600; | |
119 | break; | |
120 | } | |
121 | ||
122 | /* set codec DAI configuration */ | |
123 | ret = codec_dai->ops->set_fmt(codec_dai, | |
124 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF | | |
125 | SND_SOC_DAIFMT_SYNC | fmt); | |
126 | if (ret < 0) { | |
127 | printk(KERN_ERR "Error from codec DAI configuration\n"); | |
128 | return ret; | |
129 | } | |
130 | ||
131 | /* set cpu DAI configuration */ | |
132 | ret = cpu_dai->ops->set_fmt(cpu_dai, | |
133 | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | | |
134 | SND_SOC_DAIFMT_SYNC | fmt); | |
135 | if (ret < 0) { | |
136 | printk(KERN_ERR "Error from cpu DAI configuration\n"); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | /* Put DC field of STCCR to 1 (not zero) */ | |
141 | ret = cpu_dai->ops->set_tdm_slot(cpu_dai, 0, 2); | |
142 | ||
143 | /* set the SSI system clock as input */ | |
144 | ret = cpu_dai->ops->set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0, | |
145 | SND_SOC_CLOCK_IN); | |
146 | if (ret < 0) { | |
147 | printk(KERN_ERR "Error when setting system SSI clk\n"); | |
148 | return ret; | |
149 | } | |
150 | ||
151 | /* set codec BCLK division for sample rate */ | |
152 | ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_BCLKDIV, bclk); | |
153 | if (ret < 0) { | |
154 | printk(KERN_ERR "Error when setting BCLK division\n"); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | ||
159 | /* codec PLL input is 25 MHz */ | |
85488037 | 160 | ret = codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, IGNORED_ARG, |
2ccafed4 M |
161 | 25000000, pll_out); |
162 | if (ret < 0) { | |
163 | printk(KERN_ERR "Error when setting PLL input\n"); | |
164 | return ret; | |
165 | } | |
166 | ||
167 | /*set codec MCLK division for sample rate */ | |
168 | ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_MCLKDIV, mclk); | |
169 | if (ret < 0) { | |
170 | printk(KERN_ERR "Error when setting MCLK division\n"); | |
171 | return ret; | |
172 | } | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static int mx27vis_hifi_hw_free(struct snd_pcm_substream *substream) | |
178 | { | |
179 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
180 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
181 | ||
182 | /* disable the PLL */ | |
183 | return codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, 0, 0); | |
184 | } | |
185 | ||
186 | /* | |
187 | * mx27vis WM8974 HiFi DAI opserations. | |
188 | */ | |
189 | static struct snd_soc_ops mx27vis_hifi_ops = { | |
190 | .hw_params = mx27vis_hifi_hw_params, | |
191 | .hw_free = mx27vis_hifi_hw_free, | |
192 | }; | |
193 | ||
194 | ||
195 | static int mx27vis_suspend(struct platform_device *pdev, pm_message_t state) | |
196 | { | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static int mx27vis_resume(struct platform_device *pdev) | |
201 | { | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static int mx27vis_probe(struct platform_device *pdev) | |
206 | { | |
207 | int ret = 0; | |
208 | ||
209 | ret = get_ssi_clk(0, &pdev->dev); | |
210 | ||
211 | if (ret < 0) { | |
212 | printk(KERN_ERR "%s: cant get ssi clock\n", __func__); | |
213 | return ret; | |
214 | } | |
215 | ||
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
220 | static int mx27vis_remove(struct platform_device *pdev) | |
221 | { | |
222 | put_ssi_clk(0); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | static struct snd_soc_dai_link mx27vis_dai[] = { | |
227 | { /* Hifi Playback*/ | |
228 | .name = "WM8974", | |
229 | .stream_name = "WM8974 HiFi", | |
230 | .cpu_dai = &imx_ssi_pcm_dai[0], | |
231 | .codec_dai = &wm8974_dai, | |
232 | .ops = &mx27vis_hifi_ops, | |
233 | }, | |
234 | }; | |
235 | ||
236 | static struct snd_soc_card mx27vis = { | |
237 | .name = "mx27vis", | |
238 | .platform = &mx1_mx2_soc_platform, | |
239 | .probe = mx27vis_probe, | |
240 | .remove = mx27vis_remove, | |
241 | .suspend_pre = mx27vis_suspend, | |
242 | .resume_post = mx27vis_resume, | |
243 | .dai_link = mx27vis_dai, | |
244 | .num_links = ARRAY_SIZE(mx27vis_dai), | |
245 | }; | |
246 | ||
247 | static struct snd_soc_device mx27vis_snd_devdata = { | |
248 | .card = &mx27vis, | |
249 | .codec_dev = &soc_codec_dev_wm8974, | |
250 | }; | |
251 | ||
252 | static struct platform_device *mx27vis_snd_device; | |
253 | ||
254 | /* Temporal definition of board specific behaviour */ | |
255 | void gpio_ssi_active(int ssi_num) | |
256 | { | |
257 | int ret = 0; | |
258 | ||
259 | unsigned int ssi1_pins[] = { | |
260 | PC20_PF_SSI1_FS, | |
261 | PC21_PF_SSI1_RXD, | |
262 | PC22_PF_SSI1_TXD, | |
263 | PC23_PF_SSI1_CLK, | |
264 | }; | |
265 | unsigned int ssi2_pins[] = { | |
266 | PC24_PF_SSI2_FS, | |
267 | PC25_PF_SSI2_RXD, | |
268 | PC26_PF_SSI2_TXD, | |
269 | PC27_PF_SSI2_CLK, | |
270 | }; | |
271 | if (ssi_num == 0) | |
272 | ret = mxc_gpio_setup_multiple_pins(ssi1_pins, | |
273 | ARRAY_SIZE(ssi1_pins), "USB OTG"); | |
274 | else | |
275 | ret = mxc_gpio_setup_multiple_pins(ssi2_pins, | |
276 | ARRAY_SIZE(ssi2_pins), "USB OTG"); | |
277 | if (ret) | |
278 | printk(KERN_ERR "Error requesting ssi %x pins\n", ssi_num); | |
279 | } | |
280 | ||
281 | ||
282 | static int __init mx27vis_init(void) | |
283 | { | |
284 | int ret; | |
285 | ||
286 | mx27vis_snd_device = platform_device_alloc("soc-audio", -1); | |
287 | if (!mx27vis_snd_device) | |
288 | return -ENOMEM; | |
289 | ||
290 | platform_set_drvdata(mx27vis_snd_device, &mx27vis_snd_devdata); | |
291 | mx27vis_snd_devdata.dev = &mx27vis_snd_device->dev; | |
292 | ret = platform_device_add(mx27vis_snd_device); | |
293 | ||
294 | if (ret) { | |
295 | printk(KERN_ERR "ASoC: Platform device allocation failed\n"); | |
296 | platform_device_put(mx27vis_snd_device); | |
297 | } | |
298 | ||
299 | /* WM8974 uses SSI1 (HPCR1) via AUDMUX port 4 for audio (PPCR1) */ | |
300 | gpio_ssi_active(0); | |
301 | audmux_connect_1_4(); | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static void __exit mx27vis_exit(void) | |
307 | { | |
308 | /* We should call some "ssi_gpio_inactive()" properly */ | |
309 | } | |
310 | ||
311 | module_init(mx27vis_init); | |
312 | module_exit(mx27vis_exit); | |
313 | ||
314 | ||
315 | MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com"); | |
316 | MODULE_DESCRIPTION("ALSA SoC WM8974 mx27vis"); | |
317 | MODULE_LICENSE("GPL"); |