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/*
* s3c2443-ac97.c -- ALSA Soc Audio Layer
*
* (c) 2007 Wolfson Microelectronics PLC.
* Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
*
* Copyright (C) 2005, Sean Choi <sh428.choi@samsung.com>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Revision history
* 21st Mar 2007 Initial Version
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/plat-s3c/regs-ac97.h>
#include <asm/arch/regs-gpio.h>
#include <asm/arch/regs-clock.h>
#include <asm/arch/audio.h>
#include <asm/dma.h>
#include <asm/arch/dma.h>
#include "s3c24xx-pcm.h"
#include "s3c24xx-ac97.h"
struct s3c24xx_ac97_info {
void __iomem *regs;
struct clk *ac97_clk;
};
static struct s3c24xx_ac97_info s3c24xx_ac97;
DECLARE_COMPLETION(ac97_completion);
static u32 codec_ready;
static DECLARE_MUTEX(ac97_mutex);
static unsigned short s3c2443_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
u32 ac_glbctrl;
u32 ac_codec_cmd;
u32 stat, addr, data;
down(&ac97_mutex);
codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
udelay(50);
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
wait_for_completion(&ac97_completion);
stat = readl(s3c24xx_ac97.regs + S3C_AC97_STAT);
addr = (stat >> 16) & 0x7f;
data = (stat & 0xffff);
if (addr != reg)
printk(KERN_ERR "s3c24xx-ac97: req addr = %02x,"
" rep addr = %02x\n", reg, addr);
up(&ac97_mutex);
return (unsigned short)data;
}
static void s3c2443_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
u32 ac_glbctrl;
u32 ac_codec_cmd;
down(&ac97_mutex);
codec_ready = S3C_AC97_GLBSTAT_CODECREADY;
ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
udelay(50);
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
wait_for_completion(&ac97_completion);
ac_codec_cmd = readl(s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
writel(ac_codec_cmd, s3c24xx_ac97.regs + S3C_AC97_CODEC_CMD);
up(&ac97_mutex);
}
static void s3c2443_ac97_warm_reset(struct snd_ac97 *ac97)
{
u32 ac_glbctrl;
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl = S3C_AC97_GLBCTRL_WARMRESET;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl = 0;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
}
static void s3c2443_ac97_cold_reset(struct snd_ac97 *ac97)
{
u32 ac_glbctrl;
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl = 0;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA |
S3C_AC97_GLBCTRL_PCMINTM_DMA | S3C_AC97_GLBCTRL_MICINTM_DMA;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
}
static irqreturn_t s3c2443_ac97_irq(int irq, void *dev_id)
{
int status;
u32 ac_glbctrl;
status = readl(s3c24xx_ac97.regs + S3C_AC97_GLBSTAT) & codec_ready;
if (status) {
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
complete(&ac97_completion);
}
return IRQ_HANDLED;
}
struct snd_ac97_bus_ops soc_ac97_ops = {
.read = s3c2443_ac97_read,
.write = s3c2443_ac97_write,
.warm_reset = s3c2443_ac97_warm_reset,
.reset = s3c2443_ac97_cold_reset,
};
static struct s3c2410_dma_client s3c2443_dma_client_out = {
.name = "AC97 PCM Stereo out"
};
static struct s3c2410_dma_client s3c2443_dma_client_in = {
.name = "AC97 PCM Stereo in"
};
static struct s3c2410_dma_client s3c2443_dma_client_micin = {
.name = "AC97 Mic Mono in"
};
static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_out = {
.client = &s3c2443_dma_client_out,
.channel = DMACH_PCM_OUT,
.dma_addr = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
.dma_size = 4,
};
static struct s3c24xx_pcm_dma_params s3c2443_ac97_pcm_stereo_in = {
.client = &s3c2443_dma_client_in,
.channel = DMACH_PCM_IN,
.dma_addr = S3C2440_PA_AC97 + S3C_AC97_PCM_DATA,
.dma_size = 4,
};
static struct s3c24xx_pcm_dma_params s3c2443_ac97_mic_mono_in = {
.client = &s3c2443_dma_client_micin,
.channel = DMACH_MIC_IN,
.dma_addr = S3C2440_PA_AC97 + S3C_AC97_MIC_DATA,
.dma_size = 4,
};
static int s3c2443_ac97_probe(struct platform_device *pdev)
{
int ret;
u32 ac_glbctrl;
s3c24xx_ac97.regs = ioremap(S3C2440_PA_AC97, 0x100);
if (s3c24xx_ac97.regs == NULL)
return -ENXIO;
s3c24xx_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");
if (s3c24xx_ac97.ac97_clk == NULL) {
printk(KERN_ERR "s3c2443-ac97 failed to get ac97_clock\n");
iounmap(s3c24xx_ac97.regs);
return -ENODEV;
}
clk_enable(s3c24xx_ac97.ac97_clk);
s3c2410_gpio_cfgpin(S3C2410_GPE0, S3C2443_GPE0_AC_nRESET);
s3c2410_gpio_cfgpin(S3C2410_GPE1, S3C2443_GPE1_AC_SYNC);
s3c2410_gpio_cfgpin(S3C2410_GPE2, S3C2443_GPE2_AC_BITCLK);
s3c2410_gpio_cfgpin(S3C2410_GPE3, S3C2443_GPE3_AC_SDI);
s3c2410_gpio_cfgpin(S3C2410_GPE4, S3C2443_GPE4_AC_SDO);
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl = S3C_AC97_GLBCTRL_COLDRESET;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl = 0;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
msleep(1);
ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
ret = request_irq(IRQ_S3C2443_AC97, s3c2443_ac97_irq,
IRQF_DISABLED, "AC97", NULL);
if (ret < 0) {
printk(KERN_ERR "s3c24xx-ac97: interrupt request failed.\n");
clk_disable(s3c24xx_ac97.ac97_clk);
clk_put(s3c24xx_ac97.ac97_clk);
iounmap(s3c24xx_ac97.regs);
}
return ret;
}
static void s3c2443_ac97_remove(struct platform_device *pdev)
{
free_irq(IRQ_S3C2443_AC97, NULL);
clk_disable(s3c24xx_ac97.ac97_clk);
clk_put(s3c24xx_ac97.ac97_clk);
iounmap(s3c24xx_ac97.regs);
}
static int s3c2443_ac97_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_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_out;
else
cpu_dai->dma_data = &s3c2443_ac97_pcm_stereo_in;
return 0;
}
static int s3c2443_ac97_trigger(struct snd_pcm_substream *substream, int cmd)
{
u32 ac_glbctrl;
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
switch(cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
else
ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
else
ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
break;
}
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
return 0;
}
static int s3c2443_ac97_hw_mic_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return -ENODEV;
else
cpu_dai->dma_data = &s3c2443_ac97_mic_mono_in;
return 0;
}
static int s3c2443_ac97_mic_trigger(struct snd_pcm_substream *substream,
int cmd)
{
u32 ac_glbctrl;
ac_glbctrl = readl(s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
switch(cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
}
writel(ac_glbctrl, s3c24xx_ac97.regs + S3C_AC97_GLBCTRL);
return 0;
}
#define s3c2443_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
struct snd_soc_cpu_dai s3c2443_ac97_dai[] = {
{
.name = "s3c2443-ac97",
.id = 0,
.type = SND_SOC_DAI_AC97,
.probe = s3c2443_ac97_probe,
.remove = s3c2443_ac97_remove,
.playback = {
.stream_name = "AC97 Playback",
.channels_min = 2,
.channels_max = 2,
.rates = s3c2443_AC97_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.stream_name = "AC97 Capture",
.channels_min = 2,
.channels_max = 2,
.rates = s3c2443_AC97_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = {
.hw_params = s3c2443_ac97_hw_params,
.trigger = s3c2443_ac97_trigger},
},
{
.name = "pxa2xx-ac97-mic",
.id = 1,
.type = SND_SOC_DAI_AC97,
.capture = {
.stream_name = "AC97 Mic Capture",
.channels_min = 1,
.channels_max = 1,
.rates = s3c2443_AC97_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = {
.hw_params = s3c2443_ac97_hw_mic_params,
.trigger = s3c2443_ac97_mic_trigger,},
},
};
EXPORT_SYMBOL_GPL(s3c2443_ac97_dai);
EXPORT_SYMBOL_GPL(soc_ac97_ops);
MODULE_AUTHOR("Graeme Gregory");
MODULE_DESCRIPTION("AC97 driver for the Samsung s3c2443 chip");
MODULE_LICENSE("GPL");
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