2 * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
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/hardware.h>
41 #include <asm/arch/at91_pio.h>
42 #include <asm/arch/gpio.h>
44 #include "../codecs/wm8731.h"
48 #define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x)
53 #define AT91_PIO_TF1 (1 << (AT91_PIN_PB6 - PIN_BASE) % 32)
54 #define AT91_PIO_TK1 (1 << (AT91_PIN_PB7 - PIN_BASE) % 32)
55 #define AT91_PIO_TD1 (1 << (AT91_PIN_PB8 - PIN_BASE) % 32)
56 #define AT91_PIO_RD1 (1 << (AT91_PIN_PB9 - PIN_BASE) % 32)
57 #define AT91_PIO_RK1 (1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
58 #define AT91_PIO_RF1 (1 << (AT91_PIN_PB11 - PIN_BASE) % 32)
61 static struct clk *pck1_clk;
62 static struct clk *pllb_clk;
64 static int eti_b1_startup(struct snd_pcm_substream *substream)
66 /* Start PCK1 clock. */
68 DBG("pck1 started\n");
73 static void eti_b1_shutdown(struct snd_pcm_substream *substream)
75 /* Stop PCK1 clock. */
76 clk_disable(pck1_clk);
77 DBG("pck1 stopped\n");
80 static struct snd_soc_ops eti_b1_ops = {
81 .startup = eti_b1_startup,
82 .shutdown = eti_b1_shutdown,
86 static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
87 SND_SOC_DAPM_MIC("Int Mic", NULL),
88 SND_SOC_DAPM_SPK("Ext Spk", NULL),
91 static const char *intercon[][3] = {
93 /* speaker connected to LHPOUT */
94 {"Ext Spk", NULL, "LHPOUT"},
96 /* mic is connected to Mic Jack, with WM8731 Mic Bias */
97 {"MICIN", NULL, "Mic Bias"},
98 {"Mic Bias", NULL, "Int Mic"},
105 * Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
107 static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
111 DBG("eti_b1_wm8731_init() called\n");
113 /* Add specific widgets */
114 for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
115 snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
118 /* Set up specific audio path interconnects */
119 for(i = 0; intercon[i][0] != NULL; i++) {
120 snd_soc_dapm_connect_input(codec, intercon[i][0],
121 intercon[i][1], intercon[i][2]);
125 snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
126 snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
128 /* always connected */
129 snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
130 snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);
132 snd_soc_dapm_sync_endpoints(codec);
137 unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd,
138 struct snd_soc_clock_info *info)
140 if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) {
141 return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000);
146 static struct snd_soc_dai_link eti_b1_dai = {
148 .stream_name = "WM8731",
149 .cpu_dai = &at91_i2s_dai[1],
150 .codec_dai = &wm8731_dai,
151 .init = eti_b1_wm8731_init,
152 .config_sysclk = eti_b1_config_sysclk,
155 static struct snd_soc_machine snd_soc_machine_eti_b1 = {
157 .dai_link = &eti_b1_dai,
162 static struct wm8731_setup_data eti_b1_wm8731_setup = {
166 static struct snd_soc_device eti_b1_snd_devdata = {
167 .machine = &snd_soc_machine_eti_b1,
168 .platform = &at91_soc_platform,
169 .codec_dev = &soc_codec_dev_wm8731,
170 .codec_data = &eti_b1_wm8731_setup,
173 static struct platform_device *eti_b1_snd_device;
175 static int __init eti_b1_init(void)
179 struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
181 if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
182 DBG("SSC1 memory region is busy\n");
186 ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
188 DBG("SSC1 memory ioremap failed\n");
190 goto fail_release_mem;
193 ssc->pid = AT91RM9200_ID_SSC1;
195 eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
196 if (!eti_b1_snd_device) {
197 DBG("platform device allocation failed\n");
202 platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
203 eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
205 ret = platform_device_add(eti_b1_snd_device);
207 DBG("platform device add failed\n");
208 platform_device_put(eti_b1_snd_device);
212 ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
213 | AT91_PIO_RD1 /* | AT91_PIO_RK1 | AT91_PIO_RF1 */;
215 /* Reset all PIO registers and assign lines to peripheral A */
216 at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
217 at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines);
218 at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
219 at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
220 at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines);
221 at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
222 at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
223 at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines);
224 at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
227 * Set PCK1 parent to PLLB and its rate to 12 Mhz.
229 pllb_clk = clk_get(NULL, "pllb");
230 pck1_clk = clk_get(NULL, "pck1");
232 clk_set_parent(pck1_clk, pllb_clk);
233 clk_set_rate(pck1_clk, 12000000);
235 DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
237 /* assign the GPIO pin to PCK1 */
238 at91_set_B_periph(AT91_PIN_PA24, 0);
245 release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
249 static void __exit eti_b1_exit(void)
251 struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
256 platform_device_unregister(eti_b1_snd_device);
259 release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
262 module_init(eti_b1_init);
263 module_exit(eti_b1_exit);
265 /* Module information */
266 MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
267 MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
268 MODULE_LICENSE("GPL");