+++ /dev/null
-/*
- * eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
- *
- * 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.
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/clk.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/soc.h>
-#include <sound/soc-dapm.h>
-
-#include <mach/hardware.h>
-#include <mach/gpio.h>
-
-#include "../codecs/wm8731.h"
-#include "at91-pcm.h"
-#include "at91-ssc.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(struct snd_pcm_substream *substream)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
- struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
- int ret;
-
- /* cpu clock is the AT91 master clock sent to the SSC */
- ret = snd_soc_dai_set_sysclk(cpu_dai, AT91_SYSCLK_MCK,
- 60000000, SND_SOC_CLOCK_IN);
- if (ret < 0)
- return ret;
-
- /* codec system clock is supplied by PCK1, set to 12MHz */
- ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
- 12000000, SND_SOC_CLOCK_IN);
- if (ret < 0)
- return ret;
-
- /* Start PCK1 clock. */
- clk_enable(pck1_clk);
- DBG("pck1 started\n");
-
- return 0;
-}
-
-static void eti_b1_shutdown(struct snd_pcm_substream *substream)
-{
- /* Stop PCK1 clock. */
- clk_disable(pck1_clk);
- DBG("pck1 stopped\n");
-}
-
-static int eti_b1_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
- struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
- int ret;
-
-#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
- unsigned int rate;
- int cmr_div, period;
-
- /* set codec DAI configuration */
- ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
- if (ret < 0)
- return ret;
-
- /* set cpu DAI configuration */
- ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
- if (ret < 0)
- return ret;
-
- /*
- * The SSC clock dividers depend on the sample rate. The CMR.DIV
- * field divides the system master clock MCK to drive the SSC TK
- * signal which provides the codec BCLK. The TCMR.PERIOD and
- * RCMR.PERIOD fields further divide the BCLK signal to drive
- * the SSC TF and RF signals which provide the codec DACLRC and
- * ADCLRC clocks.
- *
- * The dividers were determined through trial and error, where a
- * CMR.DIV value is chosen such that the resulting BCLK value is
- * divisible, or almost divisible, by (2 * sample rate), and then
- * the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1.
- */
- rate = params_rate(params);
-
- switch (rate) {
- case 8000:
- cmr_div = 25; /* BCLK = 60MHz/(2*25) = 1.2MHz */
- period = 74; /* LRC = BCLK/(2*(74+1)) = 8000Hz */
- break;
- case 32000:
- cmr_div = 7; /* BCLK = 60MHz/(2*7) ~= 4.28571428MHz */
- period = 66; /* LRC = BCLK/(2*(66+1)) = 31982.942Hz */
- break;
- case 48000:
- cmr_div = 13; /* BCLK = 60MHz/(2*13) ~= 2.3076923MHz */
- period = 23; /* LRC = BCLK/(2*(23+1)) = 48076.923Hz */
- break;
- default:
- printk(KERN_WARNING "unsupported rate %d on ETI-B1 board\n", rate);
- return -EINVAL;
- }
-
- /* set the MCK divider for BCLK */
- ret = snd_soc_dai_set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div);
- if (ret < 0)
- return ret;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- /* set the BCLK divider for DACLRC */
- ret = snd_soc_dai_set_clkdiv(cpu_dai,
- AT91SSC_TCMR_PERIOD, period);
- } else {
- /* set the BCLK divider for ADCLRC */
- ret = snd_soc_dai_set_clkdiv(cpu_dai,
- AT91SSC_RCMR_PERIOD, period);
- }
- if (ret < 0)
- return ret;
-
-#else /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
- /*
- * Codec in Master Mode.
- */
-
- /* set codec DAI configuration */
- ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
- if (ret < 0)
- return ret;
-
- /* set cpu DAI configuration */
- ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
- SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
- if (ret < 0)
- return ret;
-
-#endif /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
-
- return 0;
-}
-
-static struct snd_soc_ops eti_b1_ops = {
- .startup = eti_b1_startup,
- .hw_params = eti_b1_hw_params,
- .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 struct snd_soc_dapm_route intercon[] = {
-
- /* 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"},
-};
-
-/*
- * Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
- */
-static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
-{
- DBG("eti_b1_wm8731_init() called\n");
-
- /* Add specific widgets */
- snd_soc_dapm_new_controls(codec, eti_b1_dapm_widgets,
- ARRAY_SIZE(eti_b1_dapm_widgets));
-
- /* Set up specific audio path interconnects */
- snd_soc_dapm_add_route(codec, intercon, ARRAY_SIZE(intercon));
-
- /* not connected */
- snd_soc_dapm_disable_pin(codec, "RLINEIN");
- snd_soc_dapm_disable_pin(codec, "LLINEIN");
-
- /* always connected */
- snd_soc_dapm_enable_pin(codec, "Int Mic");
- snd_soc_dapm_enable_pin(codec, "Ext Spk");
-
- snd_soc_dapm_sync(codec);
-
- return 0;
-}
-
-static struct snd_soc_dai_link eti_b1_dai = {
- .name = "WM8731",
- .stream_name = "WM8731 PCM",
- .cpu_dai = &at91_ssc_dai[1],
- .codec_dai = &wm8731_dai,
- .init = eti_b1_wm8731_init,
- .ops = &eti_b1_ops,
-};
-
-static struct snd_soc_machine snd_soc_machine_eti_b1 = {
- .name = "ETI_B1_WM8731",
- .dai_link = &eti_b1_dai,
- .num_links = 1,
-};
-
-static struct wm8731_setup_data eti_b1_wm8731_setup = {
- .i2c_bus = 0,
- .i2c_address = 0x1a,
-};
-
-static struct snd_soc_device eti_b1_snd_devdata = {
- .machine = &snd_soc_machine_eti_b1,
- .platform = &at91_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;
- struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
-
- if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
- DBG("SSC1 memory region is busy\n");
- return -EBUSY;
- }
-
- ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
- if (!ssc->base) {
- DBG("SSC1 memory ioremap failed\n");
- ret = -ENOMEM;
- goto fail_release_mem;
- }
-
- ssc->pid = AT91RM9200_ID_SSC1;
-
- eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
- if (!eti_b1_snd_device) {
- DBG("platform device allocation failed\n");
- ret = -ENOMEM;
- goto fail_io_unmap;
- }
-
- 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) {
- DBG("platform device add failed\n");
- platform_device_put(eti_b1_snd_device);
- goto fail_io_unmap;
- }
-
- at91_set_A_periph(AT91_PIN_PB6, 0); /* TF1 */
- at91_set_A_periph(AT91_PIN_PB7, 0); /* TK1 */
- at91_set_A_periph(AT91_PIN_PB8, 0); /* TD1 */
- at91_set_A_periph(AT91_PIN_PB9, 0); /* RD1 */
-/* at91_set_A_periph(AT91_PIN_PB10, 0);*/ /* RK1 */
- at91_set_A_periph(AT91_PIN_PB11, 0); /* RF1 */
-
- /*
- * 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);
-
-#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
- printk(KERN_INFO "eti_b1_wm8731: Codec in Slave Mode\n");
-#else
- printk(KERN_INFO "eti_b1_wm8731: Codec in Master Mode\n");
-#endif
- return ret;
-
-fail_io_unmap:
- iounmap(ssc->base);
-fail_release_mem:
- release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
- return ret;
-}
-
-static void __exit eti_b1_exit(void)
-{
- struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
-
- clk_put(pck1_clk);
- clk_put(pllb_clk);
-
- platform_device_unregister(eti_b1_snd_device);
-
- iounmap(ssc->base);
- release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
-}
-
-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");
projects / openwrt / staging / blogic.git / commitdiff