2 * eti_b1_wm8731 -- SoC audio for Endrelia ETI_B1.
4 * Author: Frank Mandarino <fmandarino@endrelia.com>
5 * Endrelia Technologies Inc.
6 * Created: Mar 29, 2006
10 * Copyright 2005 Wolfson Microelectronics PLC.
11 * Copyright 2005 Openedhand Ltd.
13 * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
14 * Richard Purdie <richard@openedhand.com>
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.
22 * 30th Nov 2005 Initial version.
26 #include <linux/module.h>
27 #include <linux/moduleparam.h>
28 #include <linux/version.h>
29 #include <linux/kernel.h>
30 #include <linux/clk.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/platform_device.h>
34 #include <sound/driver.h>
35 #include <sound/core.h>
36 #include <sound/pcm.h>
37 #include <sound/soc.h>
38 #include <sound/soc-dapm.h>
40 #include <asm/arch/at91rm9200.h>
41 #include <asm/arch/gpio.h>
42 #include <asm/arch/hardware.h>
44 #include "../codecs/wm8731.h"
45 #include "at91rm9200-pcm.h"
48 #define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x)
53 static struct clk *pck1_clk;
54 static struct clk *pllb_clk;
56 static int eti_b1_startup(snd_pcm_substream_t *substream)
58 /* Start PCK1 clock. */
60 DBG("pck1 started\n");
65 static void eti_b1_shutdown(snd_pcm_substream_t *substream)
67 /* Stop PCK1 clock. */
68 clk_disable(pck1_clk);
69 DBG("pck1 stopped\n");
72 static struct snd_soc_ops eti_b1_ops = {
73 .startup = eti_b1_startup,
74 .shutdown = eti_b1_shutdown,
78 static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
79 SND_SOC_DAPM_MIC("Int Mic", NULL),
80 SND_SOC_DAPM_SPK("Ext Spk", NULL),
83 static const char *intercon[][3] = {
85 /* speaker connected to LHPOUT */
86 {"Ext Spk", NULL, "LHPOUT"},
88 /* mic is connected to Mic Jack, with WM8731 Mic Bias */
89 {"MICIN", NULL, "Mic Bias"},
90 {"Mic Bias", NULL, "Int Mic"},
97 * Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
99 static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
103 DBG("eti_b1_wm8731_init() called\n");
105 /* Add specific widgets */
106 for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
107 snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
110 /* Set up specific audio path interconnects */
111 for(i = 0; intercon[i][0] != NULL; i++) {
112 snd_soc_dapm_connect_input(codec, intercon[i][0],
113 intercon[i][1], intercon[i][2]);
117 snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
118 snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
120 /* always connected */
121 snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
122 snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);
124 snd_soc_dapm_sync_endpoints(codec);
129 unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
130 struct snd_soc_clock_info *info)
132 if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
133 return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
138 static struct snd_soc_dai_link eti_b1_dai = {
140 .stream_name = "WM8731",
141 .cpu_dai = &at91rm9200_i2s_dai[1],
142 .codec_dai = &wm8731_dai,
143 .init = eti_b1_wm8731_init,
144 .config_sysclk = eti_b1_config_sysclk,
147 static struct snd_soc_machine snd_soc_machine_eti_b1 = {
149 .dai_link = &eti_b1_dai,
154 static struct wm8731_setup_data eti_b1_wm8731_setup = {
158 static struct snd_soc_device eti_b1_snd_devdata = {
159 .machine = &snd_soc_machine_eti_b1,
160 .platform = &at91rm9200_soc_platform,
161 .codec_dev = &soc_codec_dev_wm8731,
162 .codec_data = &eti_b1_wm8731_setup,
165 static struct platform_device *eti_b1_snd_device;
167 static int __init eti_b1_init(void)
172 eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
173 if (!eti_b1_snd_device)
176 platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
177 eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
179 ret = platform_device_add(eti_b1_snd_device);
181 platform_device_put(eti_b1_snd_device);
185 ssc_pio_lines = AT91_PB6_TF1 | AT91_PB7_TK1 | AT91_PB8_TD1
186 | AT91_PB9_RD1 /* | AT91_PB10_RK1 | AT91_PB11_RF1 */;
188 /* Reset all PIO registers and assign lines to peripheral A */
189 at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
190 at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines);
191 at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
192 at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
193 at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines);
194 at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
195 at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
196 at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines);
197 at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
200 * Set PCK1 parent to PLLB and its rate to 12 Mhz.
202 pllb_clk = clk_get(NULL, "pllb");
203 pck1_clk = clk_get(NULL, "pck1");
205 clk_set_parent(pck1_clk, pllb_clk);
206 clk_set_rate(pck1_clk, 12000000);
208 DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
210 /* assign the GPIO pin to PCK1 */
211 at91_set_B_periph(AT91_PIN_PA24, 0);
216 static void __exit eti_b1_exit(void)
221 platform_device_unregister(eti_b1_snd_device);
224 module_init(eti_b1_init);
225 module_exit(eti_b1_exit);
227 /* Module information */
228 MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
229 MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
230 MODULE_LICENSE("GPL");