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b41bf38a | 1 | /* |
9f0ac6e1 | 2 | * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board. |
b41bf38a FM |
3 | * |
4 | * Author: Frank Mandarino <fmandarino@endrelia.com> | |
5 | * Endrelia Technologies Inc. | |
6 | * Created: Mar 29, 2006 | |
7 | * | |
8 | * Based on corgi.c by: | |
9 | * | |
10 | * Copyright 2005 Wolfson Microelectronics PLC. | |
11 | * Copyright 2005 Openedhand Ltd. | |
12 | * | |
13 | * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com> | |
14 | * Richard Purdie <richard@openedhand.com> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify it | |
17 | * under the terms of the GNU General Public License as published by the | |
18 | * Free Software Foundation; either version 2 of the License, or (at your | |
19 | * option) any later version. | |
20 | * | |
b41bf38a FM |
21 | */ |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/moduleparam.h> | |
25 | #include <linux/version.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/clk.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/interrupt.h> | |
30 | #include <linux/platform_device.h> | |
b41bf38a FM |
31 | #include <sound/core.h> |
32 | #include <sound/pcm.h> | |
33 | #include <sound/soc.h> | |
34 | #include <sound/soc-dapm.h> | |
35 | ||
c21098ea | 36 | #include <asm/hardware.h> |
9f0ac6e1 | 37 | #include <asm/arch/gpio.h> |
b41bf38a FM |
38 | |
39 | #include "../codecs/wm8731.h" | |
9f0ac6e1 | 40 | #include "at91-pcm.h" |
eb831da5 | 41 | #include "at91-ssc.h" |
b41bf38a FM |
42 | |
43 | #if 0 | |
c8044274 | 44 | #define DBG(x...) printk(KERN_INFO "eti_b1_wm8731: " x) |
b41bf38a FM |
45 | #else |
46 | #define DBG(x...) | |
47 | #endif | |
48 | ||
49 | static struct clk *pck1_clk; | |
50 | static struct clk *pllb_clk; | |
51 | ||
c8044274 | 52 | |
9f0ac6e1 | 53 | static int eti_b1_startup(struct snd_pcm_substream *substream) |
b41bf38a | 54 | { |
c8044274 FM |
55 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
56 | struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai; | |
57 | struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai; | |
58 | int ret; | |
59 | ||
60 | /* cpu clock is the AT91 master clock sent to the SSC */ | |
61 | ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, AT91_SYSCLK_MCK, | |
62 | 60000000, SND_SOC_CLOCK_IN); | |
63 | if (ret < 0) | |
64 | return ret; | |
65 | ||
66 | /* codec system clock is supplied by PCK1, set to 12MHz */ | |
67 | ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8731_SYSCLK, | |
68 | 12000000, SND_SOC_CLOCK_IN); | |
69 | if (ret < 0) | |
70 | return ret; | |
71 | ||
b41bf38a FM |
72 | /* Start PCK1 clock. */ |
73 | clk_enable(pck1_clk); | |
74 | DBG("pck1 started\n"); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
9f0ac6e1 | 79 | static void eti_b1_shutdown(struct snd_pcm_substream *substream) |
b41bf38a FM |
80 | { |
81 | /* Stop PCK1 clock. */ | |
82 | clk_disable(pck1_clk); | |
83 | DBG("pck1 stopped\n"); | |
84 | } | |
85 | ||
c8044274 FM |
86 | static int eti_b1_hw_params(struct snd_pcm_substream *substream, |
87 | struct snd_pcm_hw_params *params) | |
88 | { | |
89 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
90 | struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai; | |
91 | struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai; | |
92 | int ret; | |
93 | ||
94 | #ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE | |
95 | unsigned int rate; | |
96 | int cmr_div, period; | |
97 | ||
98 | /* set codec DAI configuration */ | |
99 | ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
100 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); | |
101 | if (ret < 0) | |
102 | return ret; | |
103 | ||
104 | /* set cpu DAI configuration */ | |
105 | ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
106 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); | |
107 | if (ret < 0) | |
108 | return ret; | |
109 | ||
110 | /* | |
111 | * The SSC clock dividers depend on the sample rate. The CMR.DIV | |
112 | * field divides the system master clock MCK to drive the SSC TK | |
113 | * signal which provides the codec BCLK. The TCMR.PERIOD and | |
114 | * RCMR.PERIOD fields further divide the BCLK signal to drive | |
115 | * the SSC TF and RF signals which provide the codec DACLRC and | |
116 | * ADCLRC clocks. | |
117 | * | |
118 | * The dividers were determined through trial and error, where a | |
119 | * CMR.DIV value is chosen such that the resulting BCLK value is | |
120 | * divisible, or almost divisible, by (2 * sample rate), and then | |
121 | * the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1. | |
122 | */ | |
123 | rate = params_rate(params); | |
124 | ||
125 | switch (rate) { | |
126 | case 8000: | |
127 | cmr_div = 25; /* BCLK = 60MHz/(2*25) = 1.2MHz */ | |
128 | period = 74; /* LRC = BCLK/(2*(74+1)) = 8000Hz */ | |
129 | break; | |
130 | case 32000: | |
131 | cmr_div = 7; /* BCLK = 60MHz/(2*7) ~= 4.28571428MHz */ | |
132 | period = 66; /* LRC = BCLK/(2*(66+1)) = 31982.942Hz */ | |
133 | break; | |
134 | case 48000: | |
135 | cmr_div = 13; /* BCLK = 60MHz/(2*13) ~= 2.3076923MHz */ | |
136 | period = 23; /* LRC = BCLK/(2*(23+1)) = 48076.923Hz */ | |
137 | break; | |
138 | default: | |
139 | printk(KERN_WARNING "unsupported rate %d on ETI-B1 board\n", rate); | |
140 | return -EINVAL; | |
141 | } | |
142 | ||
143 | /* set the MCK divider for BCLK */ | |
144 | ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div); | |
145 | if (ret < 0) | |
146 | return ret; | |
147 | ||
148 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
149 | /* set the BCLK divider for DACLRC */ | |
150 | ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, | |
151 | AT91SSC_TCMR_PERIOD, period); | |
152 | } else { | |
153 | /* set the BCLK divider for ADCLRC */ | |
154 | ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, | |
155 | AT91SSC_RCMR_PERIOD, period); | |
156 | } | |
157 | if (ret < 0) | |
158 | return ret; | |
159 | ||
160 | #else /* CONFIG_SND_AT91_SOC_ETI_SLAVE */ | |
161 | /* | |
162 | * Codec in Master Mode. | |
163 | */ | |
164 | ||
165 | /* set codec DAI configuration */ | |
166 | ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | | |
167 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); | |
168 | if (ret < 0) | |
169 | return ret; | |
170 | ||
171 | /* set cpu DAI configuration */ | |
172 | ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | | |
173 | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM); | |
174 | if (ret < 0) | |
175 | return ret; | |
176 | ||
177 | #endif /* CONFIG_SND_AT91_SOC_ETI_SLAVE */ | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
b41bf38a FM |
182 | static struct snd_soc_ops eti_b1_ops = { |
183 | .startup = eti_b1_startup, | |
c8044274 | 184 | .hw_params = eti_b1_hw_params, |
b41bf38a FM |
185 | .shutdown = eti_b1_shutdown, |
186 | }; | |
187 | ||
188 | ||
189 | static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = { | |
190 | SND_SOC_DAPM_MIC("Int Mic", NULL), | |
191 | SND_SOC_DAPM_SPK("Ext Spk", NULL), | |
192 | }; | |
193 | ||
194 | static const char *intercon[][3] = { | |
195 | ||
196 | /* speaker connected to LHPOUT */ | |
197 | {"Ext Spk", NULL, "LHPOUT"}, | |
198 | ||
199 | /* mic is connected to Mic Jack, with WM8731 Mic Bias */ | |
200 | {"MICIN", NULL, "Mic Bias"}, | |
201 | {"Mic Bias", NULL, "Int Mic"}, | |
202 | ||
203 | /* terminator */ | |
204 | {NULL, NULL, NULL}, | |
205 | }; | |
206 | ||
207 | /* | |
208 | * Logic for a wm8731 as connected on a Endrelia ETI-B1 board. | |
209 | */ | |
210 | static int eti_b1_wm8731_init(struct snd_soc_codec *codec) | |
211 | { | |
212 | int i; | |
213 | ||
214 | DBG("eti_b1_wm8731_init() called\n"); | |
215 | ||
216 | /* Add specific widgets */ | |
217 | for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) { | |
218 | snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]); | |
219 | } | |
220 | ||
221 | /* Set up specific audio path interconnects */ | |
222 | for(i = 0; intercon[i][0] != NULL; i++) { | |
223 | snd_soc_dapm_connect_input(codec, intercon[i][0], | |
224 | intercon[i][1], intercon[i][2]); | |
225 | } | |
226 | ||
227 | /* not connected */ | |
228 | snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0); | |
229 | snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0); | |
230 | ||
231 | /* always connected */ | |
232 | snd_soc_dapm_set_endpoint(codec, "Int Mic", 1); | |
233 | snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1); | |
234 | ||
235 | snd_soc_dapm_sync_endpoints(codec); | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
b41bf38a FM |
240 | static struct snd_soc_dai_link eti_b1_dai = { |
241 | .name = "WM8731", | |
eb831da5 FM |
242 | .stream_name = "WM8731 PCM", |
243 | .cpu_dai = &at91_ssc_dai[1], | |
b41bf38a FM |
244 | .codec_dai = &wm8731_dai, |
245 | .init = eti_b1_wm8731_init, | |
c8044274 | 246 | .ops = &eti_b1_ops, |
b41bf38a FM |
247 | }; |
248 | ||
249 | static struct snd_soc_machine snd_soc_machine_eti_b1 = { | |
eb831da5 | 250 | .name = "ETI_B1_WM8731", |
b41bf38a FM |
251 | .dai_link = &eti_b1_dai, |
252 | .num_links = 1, | |
b41bf38a FM |
253 | }; |
254 | ||
255 | static struct wm8731_setup_data eti_b1_wm8731_setup = { | |
256 | .i2c_address = 0x1a, | |
257 | }; | |
258 | ||
259 | static struct snd_soc_device eti_b1_snd_devdata = { | |
260 | .machine = &snd_soc_machine_eti_b1, | |
9f0ac6e1 | 261 | .platform = &at91_soc_platform, |
b41bf38a FM |
262 | .codec_dev = &soc_codec_dev_wm8731, |
263 | .codec_data = &eti_b1_wm8731_setup, | |
264 | }; | |
265 | ||
266 | static struct platform_device *eti_b1_snd_device; | |
267 | ||
268 | static int __init eti_b1_init(void) | |
269 | { | |
270 | int ret; | |
9f0ac6e1 FM |
271 | struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data; |
272 | ||
273 | if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) { | |
274 | DBG("SSC1 memory region is busy\n"); | |
275 | return -EBUSY; | |
276 | } | |
277 | ||
278 | ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K); | |
279 | if (!ssc->base) { | |
280 | DBG("SSC1 memory ioremap failed\n"); | |
281 | ret = -ENOMEM; | |
282 | goto fail_release_mem; | |
283 | } | |
284 | ||
285 | ssc->pid = AT91RM9200_ID_SSC1; | |
b41bf38a FM |
286 | |
287 | eti_b1_snd_device = platform_device_alloc("soc-audio", -1); | |
9f0ac6e1 FM |
288 | if (!eti_b1_snd_device) { |
289 | DBG("platform device allocation failed\n"); | |
290 | ret = -ENOMEM; | |
291 | goto fail_io_unmap; | |
292 | } | |
b41bf38a FM |
293 | |
294 | platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata); | |
295 | eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev; | |
296 | ||
297 | ret = platform_device_add(eti_b1_snd_device); | |
298 | if (ret) { | |
9f0ac6e1 | 299 | DBG("platform device add failed\n"); |
b41bf38a | 300 | platform_device_put(eti_b1_snd_device); |
9f0ac6e1 | 301 | goto fail_io_unmap; |
b41bf38a FM |
302 | } |
303 | ||
c21098ea AV |
304 | at91_set_A_periph(AT91_PIN_PB6, 0); /* TF1 */ |
305 | at91_set_A_periph(AT91_PIN_PB7, 0); /* TK1 */ | |
306 | at91_set_A_periph(AT91_PIN_PB8, 0); /* TD1 */ | |
307 | at91_set_A_periph(AT91_PIN_PB9, 0); /* RD1 */ | |
308 | /* at91_set_A_periph(AT91_PIN_PB10, 0);*/ /* RK1 */ | |
309 | at91_set_A_periph(AT91_PIN_PB11, 0); /* RF1 */ | |
b41bf38a FM |
310 | |
311 | /* | |
312 | * Set PCK1 parent to PLLB and its rate to 12 Mhz. | |
313 | */ | |
314 | pllb_clk = clk_get(NULL, "pllb"); | |
315 | pck1_clk = clk_get(NULL, "pck1"); | |
316 | ||
317 | clk_set_parent(pck1_clk, pllb_clk); | |
318 | clk_set_rate(pck1_clk, 12000000); | |
319 | ||
320 | DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk)); | |
321 | ||
322 | /* assign the GPIO pin to PCK1 */ | |
323 | at91_set_B_periph(AT91_PIN_PA24, 0); | |
324 | ||
c8044274 FM |
325 | #ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE |
326 | printk(KERN_INFO "eti_b1_wm8731: Codec in Slave Mode\n"); | |
327 | #else | |
328 | printk(KERN_INFO "eti_b1_wm8731: Codec in Master Mode\n"); | |
329 | #endif | |
b41bf38a | 330 | return ret; |
9f0ac6e1 FM |
331 | |
332 | fail_io_unmap: | |
333 | iounmap(ssc->base); | |
334 | fail_release_mem: | |
335 | release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K); | |
336 | return ret; | |
b41bf38a FM |
337 | } |
338 | ||
339 | static void __exit eti_b1_exit(void) | |
340 | { | |
9f0ac6e1 FM |
341 | struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data; |
342 | ||
b41bf38a FM |
343 | clk_put(pck1_clk); |
344 | clk_put(pllb_clk); | |
345 | ||
346 | platform_device_unregister(eti_b1_snd_device); | |
9f0ac6e1 FM |
347 | |
348 | iounmap(ssc->base); | |
349 | release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K); | |
b41bf38a FM |
350 | } |
351 | ||
352 | module_init(eti_b1_init); | |
353 | module_exit(eti_b1_exit); | |
354 | ||
355 | /* Module information */ | |
356 | MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>"); | |
357 | MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731"); | |
358 | MODULE_LICENSE("GPL"); |