+++ /dev/null
-/*
- * 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.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/wait.h>
-#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/clk.h>
-
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/ac97_codec.h>
-#include <sound/initval.h>
-#include <sound/soc.h>
-
-#include <mach/hardware.h>
-#include <plat/regs-ac97.h>
-#include <mach/regs-gpio.h>
-#include <mach/regs-clock.h>
-#include <asm/dma.h>
-#include <mach/dma.h>
-
-#include "s3c-dma.h"
-#include "s3c24xx-ac97.h"
-
-struct s3c24xx_ac97_info {
- void __iomem *regs;
- struct clk *ac97_clk;
-};
-static struct s3c24xx_ac97_info s3c24xx_ac97;
-
-static DECLARE_COMPLETION(ac97_completion);
-static u32 codec_ready;
-static DEFINE_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;
-
- mutex_lock(&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);
-
- mutex_unlock(&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;
-
- mutex_lock(&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);
-
- mutex_unlock(&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 s3c_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 s3c_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 s3c_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,
- struct snd_soc_dai *dai)
-{
- 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_S3C244x_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,
- struct snd_soc_dai *dai)
-{
- free_irq(IRQ_S3C244x_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_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_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,
- struct snd_soc_dai *dai)
-{
- u32 ac_glbctrl;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- int channel = ((struct s3c_dma_params *)
- rtd->dai->cpu_dai->dma_data)->channel;
-
- 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);
-
- s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);
-
- return 0;
-}
-
-static int s3c2443_ac97_hw_mic_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
-{
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- struct snd_soc_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, struct snd_soc_dai *dai)
-{
- u32 ac_glbctrl;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
- int channel = ((struct s3c_dma_params *)
- rtd->dai->cpu_dai->dma_data)->channel;
-
- 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);
-
- s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);
-
- 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)
-
-static struct snd_soc_dai_ops s3c2443_ac97_dai_ops = {
- .hw_params = s3c2443_ac97_hw_params,
- .trigger = s3c2443_ac97_trigger,
-};
-
-static struct snd_soc_dai_ops s3c2443_ac97_mic_dai_ops = {
- .hw_params = s3c2443_ac97_hw_mic_params,
- .trigger = s3c2443_ac97_mic_trigger,
-};
-
-struct snd_soc_dai s3c2443_ac97_dai[] = {
-{
- .name = "s3c2443-ac97",
- .id = 0,
- .ac97_control = 1,
- .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 = &s3c2443_ac97_dai_ops,
-},
-{
- .name = "pxa2xx-ac97-mic",
- .id = 1,
- .ac97_control = 1,
- .capture = {
- .stream_name = "AC97 Mic Capture",
- .channels_min = 1,
- .channels_max = 1,
- .rates = s3c2443_AC97_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,},
- .ops = &s3c2443_ac97_mic_dai_ops,
-},
-};
-EXPORT_SYMBOL_GPL(s3c2443_ac97_dai);
-EXPORT_SYMBOL_GPL(soc_ac97_ops);
-
-static int __init s3c2443_ac97_init(void)
-{
- return snd_soc_register_dais(s3c2443_ac97_dai,
- ARRAY_SIZE(s3c2443_ac97_dai));
-}
-module_init(s3c2443_ac97_init);
-
-static void __exit s3c2443_ac97_exit(void)
-{
- snd_soc_unregister_dais(s3c2443_ac97_dai,
- ARRAY_SIZE(s3c2443_ac97_dai));
-}
-module_exit(s3c2443_ac97_exit);
-
-
-MODULE_AUTHOR("Graeme Gregory");
-MODULE_DESCRIPTION("AC97 driver for the Samsung s3c2443 chip");
-MODULE_LICENSE("GPL");
projects / linux-beck.git / commitdiff