![Takashi Iwai](/assets/img/avatar_default.png)
This header file exists only for some hacks to adapt alsa-driver tree. It's useless for building in the kernel. Let's move a few lines in it to sound/core.h and remove it. With this patch, sound/driver.h isn't removed but has just a single compile warning to include it. This should be really killed in future. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
375 lines
9.9 KiB
C
375 lines
9.9 KiB
C
/*
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* eti_b1_wm8731 -- SoC audio for AT91RM9200-based Endrelia ETI_B1 board.
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*
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* Author: Frank Mandarino <fmandarino@endrelia.com>
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* Endrelia Technologies Inc.
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* Created: Mar 29, 2006
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*
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* Based on corgi.c by:
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*
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Copyright 2005 Openedhand Ltd.
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*
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* Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
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* Richard Purdie <richard@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/version.h>
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#include <linux/kernel.h>
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#include <linux/clk.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/at91_pio.h>
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#include <asm/arch/gpio.h>
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#include "../codecs/wm8731.h"
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#include "at91-pcm.h"
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#include "at91-ssc.h"
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#if 0
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#define DBG(x...) printk(KERN_INFO "eti_b1_wm8731: " x)
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#else
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#define DBG(x...)
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#endif
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#define AT91_PIO_TF1 (1 << (AT91_PIN_PB6 - PIN_BASE) % 32)
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#define AT91_PIO_TK1 (1 << (AT91_PIN_PB7 - PIN_BASE) % 32)
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#define AT91_PIO_TD1 (1 << (AT91_PIN_PB8 - PIN_BASE) % 32)
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#define AT91_PIO_RD1 (1 << (AT91_PIN_PB9 - PIN_BASE) % 32)
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#define AT91_PIO_RK1 (1 << (AT91_PIN_PB10 - PIN_BASE) % 32)
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#define AT91_PIO_RF1 (1 << (AT91_PIN_PB11 - PIN_BASE) % 32)
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static struct clk *pck1_clk;
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static struct clk *pllb_clk;
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static int eti_b1_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
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int ret;
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/* cpu clock is the AT91 master clock sent to the SSC */
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ret = cpu_dai->dai_ops.set_sysclk(cpu_dai, AT91_SYSCLK_MCK,
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60000000, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* codec system clock is supplied by PCK1, set to 12MHz */
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ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8731_SYSCLK,
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12000000, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* Start PCK1 clock. */
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clk_enable(pck1_clk);
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DBG("pck1 started\n");
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return 0;
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}
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static void eti_b1_shutdown(struct snd_pcm_substream *substream)
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{
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/* Stop PCK1 clock. */
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clk_disable(pck1_clk);
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DBG("pck1 stopped\n");
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}
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static int eti_b1_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
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struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
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int ret;
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#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
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unsigned int rate;
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int cmr_div, period;
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/* set codec DAI configuration */
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ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
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if (ret < 0)
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return ret;
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/*
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* The SSC clock dividers depend on the sample rate. The CMR.DIV
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* field divides the system master clock MCK to drive the SSC TK
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* signal which provides the codec BCLK. The TCMR.PERIOD and
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* RCMR.PERIOD fields further divide the BCLK signal to drive
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* the SSC TF and RF signals which provide the codec DACLRC and
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* ADCLRC clocks.
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*
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* The dividers were determined through trial and error, where a
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* CMR.DIV value is chosen such that the resulting BCLK value is
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* divisible, or almost divisible, by (2 * sample rate), and then
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* the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1.
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*/
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rate = params_rate(params);
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switch (rate) {
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case 8000:
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cmr_div = 25; /* BCLK = 60MHz/(2*25) = 1.2MHz */
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period = 74; /* LRC = BCLK/(2*(74+1)) = 8000Hz */
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break;
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case 32000:
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cmr_div = 7; /* BCLK = 60MHz/(2*7) ~= 4.28571428MHz */
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period = 66; /* LRC = BCLK/(2*(66+1)) = 31982.942Hz */
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break;
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case 48000:
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cmr_div = 13; /* BCLK = 60MHz/(2*13) ~= 2.3076923MHz */
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period = 23; /* LRC = BCLK/(2*(23+1)) = 48076.923Hz */
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break;
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default:
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printk(KERN_WARNING "unsupported rate %d on ETI-B1 board\n", rate);
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return -EINVAL;
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}
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/* set the MCK divider for BCLK */
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ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div);
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if (ret < 0)
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return ret;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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/* set the BCLK divider for DACLRC */
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ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
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AT91SSC_TCMR_PERIOD, period);
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} else {
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/* set the BCLK divider for ADCLRC */
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ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai,
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AT91SSC_RCMR_PERIOD, period);
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}
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if (ret < 0)
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return ret;
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#else /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
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/*
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* Codec in Master Mode.
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*/
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/* set codec DAI configuration */
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ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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return ret;
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/* set cpu DAI configuration */
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ret = cpu_dai->dai_ops.set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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return ret;
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#endif /* CONFIG_SND_AT91_SOC_ETI_SLAVE */
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return 0;
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}
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static struct snd_soc_ops eti_b1_ops = {
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.startup = eti_b1_startup,
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.hw_params = eti_b1_hw_params,
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.shutdown = eti_b1_shutdown,
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};
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static const struct snd_soc_dapm_widget eti_b1_dapm_widgets[] = {
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SND_SOC_DAPM_MIC("Int Mic", NULL),
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SND_SOC_DAPM_SPK("Ext Spk", NULL),
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};
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static const char *intercon[][3] = {
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/* speaker connected to LHPOUT */
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{"Ext Spk", NULL, "LHPOUT"},
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/* mic is connected to Mic Jack, with WM8731 Mic Bias */
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{"MICIN", NULL, "Mic Bias"},
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{"Mic Bias", NULL, "Int Mic"},
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/* terminator */
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{NULL, NULL, NULL},
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};
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/*
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* Logic for a wm8731 as connected on a Endrelia ETI-B1 board.
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*/
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static int eti_b1_wm8731_init(struct snd_soc_codec *codec)
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{
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int i;
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DBG("eti_b1_wm8731_init() called\n");
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/* Add specific widgets */
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for(i = 0; i < ARRAY_SIZE(eti_b1_dapm_widgets); i++) {
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snd_soc_dapm_new_control(codec, &eti_b1_dapm_widgets[i]);
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}
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/* Set up specific audio path interconnects */
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for(i = 0; intercon[i][0] != NULL; i++) {
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snd_soc_dapm_connect_input(codec, intercon[i][0],
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intercon[i][1], intercon[i][2]);
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}
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/* not connected */
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snd_soc_dapm_set_endpoint(codec, "RLINEIN", 0);
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snd_soc_dapm_set_endpoint(codec, "LLINEIN", 0);
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/* always connected */
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snd_soc_dapm_set_endpoint(codec, "Int Mic", 1);
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snd_soc_dapm_set_endpoint(codec, "Ext Spk", 1);
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snd_soc_dapm_sync_endpoints(codec);
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return 0;
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}
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static struct snd_soc_dai_link eti_b1_dai = {
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.name = "WM8731",
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.stream_name = "WM8731 PCM",
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.cpu_dai = &at91_ssc_dai[1],
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.codec_dai = &wm8731_dai,
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.init = eti_b1_wm8731_init,
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.ops = &eti_b1_ops,
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};
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static struct snd_soc_machine snd_soc_machine_eti_b1 = {
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.name = "ETI_B1_WM8731",
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.dai_link = &eti_b1_dai,
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.num_links = 1,
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};
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static struct wm8731_setup_data eti_b1_wm8731_setup = {
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.i2c_address = 0x1a,
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};
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static struct snd_soc_device eti_b1_snd_devdata = {
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.machine = &snd_soc_machine_eti_b1,
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.platform = &at91_soc_platform,
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.codec_dev = &soc_codec_dev_wm8731,
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.codec_data = &eti_b1_wm8731_setup,
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};
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static struct platform_device *eti_b1_snd_device;
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static int __init eti_b1_init(void)
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{
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int ret;
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u32 ssc_pio_lines;
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struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
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if (!request_mem_region(AT91RM9200_BASE_SSC1, SZ_16K, "soc-audio")) {
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DBG("SSC1 memory region is busy\n");
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return -EBUSY;
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}
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ssc->base = ioremap(AT91RM9200_BASE_SSC1, SZ_16K);
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if (!ssc->base) {
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DBG("SSC1 memory ioremap failed\n");
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ret = -ENOMEM;
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goto fail_release_mem;
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}
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ssc->pid = AT91RM9200_ID_SSC1;
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eti_b1_snd_device = platform_device_alloc("soc-audio", -1);
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if (!eti_b1_snd_device) {
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DBG("platform device allocation failed\n");
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ret = -ENOMEM;
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goto fail_io_unmap;
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}
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platform_set_drvdata(eti_b1_snd_device, &eti_b1_snd_devdata);
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eti_b1_snd_devdata.dev = &eti_b1_snd_device->dev;
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ret = platform_device_add(eti_b1_snd_device);
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if (ret) {
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DBG("platform device add failed\n");
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platform_device_put(eti_b1_snd_device);
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goto fail_io_unmap;
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}
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ssc_pio_lines = AT91_PIO_TF1 | AT91_PIO_TK1 | AT91_PIO_TD1
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| AT91_PIO_RD1 /* | AT91_PIO_RK1 */ | AT91_PIO_RF1;
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/* Reset all PIO registers and assign lines to peripheral A */
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at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines);
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at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
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/*
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* Set PCK1 parent to PLLB and its rate to 12 Mhz.
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*/
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pllb_clk = clk_get(NULL, "pllb");
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pck1_clk = clk_get(NULL, "pck1");
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clk_set_parent(pck1_clk, pllb_clk);
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clk_set_rate(pck1_clk, 12000000);
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DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
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/* assign the GPIO pin to PCK1 */
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at91_set_B_periph(AT91_PIN_PA24, 0);
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#ifdef CONFIG_SND_AT91_SOC_ETI_SLAVE
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printk(KERN_INFO "eti_b1_wm8731: Codec in Slave Mode\n");
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#else
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printk(KERN_INFO "eti_b1_wm8731: Codec in Master Mode\n");
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#endif
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return ret;
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fail_io_unmap:
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iounmap(ssc->base);
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fail_release_mem:
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release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
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return ret;
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}
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static void __exit eti_b1_exit(void)
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{
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struct at91_ssc_periph *ssc = eti_b1_dai.cpu_dai->private_data;
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clk_put(pck1_clk);
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clk_put(pllb_clk);
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platform_device_unregister(eti_b1_snd_device);
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iounmap(ssc->base);
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release_mem_region(AT91RM9200_BASE_SSC1, SZ_16K);
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}
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module_init(eti_b1_init);
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module_exit(eti_b1_exit);
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/* Module information */
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MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
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MODULE_DESCRIPTION("ALSA SoC ETI-B1-WM8731");
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MODULE_LICENSE("GPL");
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