diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/at91/eti_b1_wm8731.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/sound/soc/at91/eti_b1_wm8731.c b/sound/soc/at91/eti_b1_wm8731.c new file mode 100644 index 00000000000..d955cacf2d0 --- /dev/null +++ b/sound/soc/at91/eti_b1_wm8731.c @@ -0,0 +1,230 @@ +/* + * eti_b1_wm8731 -- SoC audio for Endrelia ETI_B1. + * + * Author: Frank Mandarino <fmandarino@endrelia.com> + * Endrelia Technologies Inc. + * Created: Mar 29, 2006 + * + * Based on corgi.c by: + * + * Copyright 2005 Wolfson Microelectronics PLC. + * Copyright 2005 Openedhand Ltd. + * + * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com> + * Richard Purdie <richard@openedhand.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * Revision history + * 30th Nov 2005 Initial version. + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <sound/driver.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> + +#include <asm/arch/at91rm9200.h> +#include <asm/arch/gpio.h> +#include <asm/arch/hardware.h> + +#include "../codecs/wm8731.h" +#include "at91rm9200-pcm.h" + +#if 0 +#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731:" x) +#else +#define DBG(x...) +#endif + +static struct clk *pck1_clk; +static struct clk *pllb_clk; + +static int eti_b1_startup(snd_pcm_substream_t *substream) +{ + /* Start PCK1 clock. */ + clk_enable(pck1_clk); + DBG("pck1 started\n"); + + return 0; +} + +static void eti_b1_shutdown(snd_pcm_substream_t *substream) +{ + /* Stop PCK1 clock. */ + clk_disable(pck1_clk); + DBG("pck1 stopped\n"); +} + +static struct snd_soc_ops eti_b1_ops = { + .startup = eti_b1_startup, + .shutdown = eti_b1_shutdown, +}; + + +static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = { + SND_SOC_DAPM_MIC("Int Mic", NULL), + SND_SOC_DAPM_SPK("Ext Spk", NULL), +}; + +static const char *intercon[][3] = { + + /* speaker connected to LHPOUT */ + {"Ext Spk", NULL, "LHPOUT"}, + + /* mic is connected to Mic Jack, with WM8731 Mic Bias */ + {"MICIN", NULL, "Mic Bias"}, + {"Mic Bias", NULL, "Int Mic"}, + + /* terminator */ + {NULL, NULL, NULL}, +}; + +/* + * Logic for a wm8731 as connected on a Endrelia ETI-B1 board. + */ +static int eti_b1_wm8731_init(struct snd_soc_codec *codec) +{ + int i; + + DBG("eti_b1_wm8731_init() called\n"); + + /* Add specific widgets */ + for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) { + snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]); + } + + /* Set up specific audio path interconnects */ + for(i = 0; intercon[i][0] != NULL; i++) { + snd_soc_dapm_connect_input(codec, intercon[i][0], + intercon[i][1], intercon[i][2]); + } + + /* not connected */ + snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0); + snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0); + + /* always connected */ + snd_soc_dapm_set_endpoint(codec, "Int Mic", 1); + snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1); + + snd_soc_dapm_sync_endpoints(codec); + + return 0; +} + +unsigned int eti_b1_config_sysclk(struct snd_soc_pcm_runtime *rtd, + struct snd_soc_clock_info *info) +{ + if(info->bclk_master & SND_SOC_DAIFMT_CBS_CFS) { + return rtd->codec_dai->config_sysclk(rtd->codec_dai, info, 12000000); + } + return 0; +} + +static struct snd_soc_dai_link eti_b1_dai = { + .name = "WM8731", + .stream_name = "WM8731", + .cpu_dai = &at91rm9200_i2s_dai[1], + .codec_dai = &wm8731_dai, + .init = eti_b1_wm8731_init, + .config_sysclk = eti_b1_config_sysclk, +}; + +static struct snd_soc_machine snd_soc_machine_eti_b1 = { + .name = "ETI_B1", + .dai_link = &eti_b1_dai, + .num_links = 1, + .ops = &eti_b1_ops, +}; + +static struct wm8731_setup_data eti_b1_wm8731_setup = { + .i2c_address = 0x1a, +}; + +static struct snd_soc_device eti_b1_snd_devdata = { + .machine = &snd_soc_machine_eti_b1, + .platform = &at91rm9200_soc_platform, + .codec_dev = &soc_codec_dev_wm8731, + .codec_data = &eti_b1_wm8731_setup, +}; + +static struct platform_device *eti_b1_snd_device; + +static int __init eti_b1_init(void) +{ + int ret; + u32 ssc_pio_lines; + + eti_b1_snd_device = platform_device_alloc("soc-audio", -1); + if (!eti_b1_snd_device) + return -ENOMEM; + + platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata); + eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev; + + ret = platform_device_add(eti_b1_snd_device); + if (ret) { + platform_device_put(eti_b1_snd_device); + return ret; + } + + ssc_pio_lines = AT91_PB6_TF1 | AT91_PB7_TK1 | AT91_PB8_TD1 + | AT91_PB9_RD1 /* | AT91_PB10_RK1 | AT91_PB11_RF1 */; + + /* Reset all PIO registers and assign lines to peripheral A */ + at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines); + at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines); + + /* + * Set PCK1 parent to PLLB and its rate to 12 Mhz. + */ + pllb_clk = clk_get(NULL, "pllb"); + pck1_clk = clk_get(NULL, "pck1"); + + clk_set_parent(pck1_clk, pllb_clk); + clk_set_rate(pck1_clk, 12000000); + + DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk)); + + /* assign the GPIO pin to PCK1 */ + at91_set_B_periph(AT91_PIN_PA24, 0); + + return ret; +} + +static void __exit eti_b1_exit(void) +{ + clk_put(pck1_clk); + clk_put(pllb_clk); + + platform_device_unregister(eti_b1_snd_device); +} + +module_init(eti_b1_init); +module_exit(eti_b1_exit); + +/* Module information */ +MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>"); +MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731"); +MODULE_LICENSE("GPL"); |