[PATCH 2/3] ASoC: AC97: S3C: Add controller driver
jassi brar
jassisinghbrar at gmail.com
Tue Jan 26 06:03:09 EST 2010
On Tue, Jan 26, 2010 at 7:23 PM, Ben Dooks <ben-linux at fluff.org> wrote:
> On Tue, Jan 26, 2010 at 02:51:40PM +0900, jassisinghbrar at gmail.com wrote:
>> From: Jassi Brar <jassi.brar at samsung.com>
>>
>> Add the AC97 controller driver for Samsung SoCs that have one.
>>
>> Signed-off-by: Jassi Brar <jassi.brar at samsung.com>
>> ---
>> sound/soc/s3c24xx/Kconfig | 6 +-
>> sound/soc/s3c24xx/Makefile | 3 +-
>> sound/soc/s3c24xx/s3c-ac97.c | 535 ++++++++++++++++++++++++++++++++++++++++++
>> sound/soc/s3c24xx/s3c-ac97.h | 23 ++
>> 4 files changed, 565 insertions(+), 2 deletions(-)
>> create mode 100644 sound/soc/s3c24xx/s3c-ac97.c
>> create mode 100644 sound/soc/s3c24xx/s3c-ac97.h
>>
>> diff --git a/sound/soc/s3c24xx/Kconfig b/sound/soc/s3c24xx/Kconfig
>> index b489f1a..ad3690e 100644
>> --- a/sound/soc/s3c24xx/Kconfig
>> +++ b/sound/soc/s3c24xx/Kconfig
>> @@ -32,7 +32,11 @@ config SND_S3C2443_SOC_AC97
>> select S3C2410_DMA
>> select AC97_BUS
>> select SND_SOC_AC97_BUS
>> -
>> +
>> +config SND_S3C_SOC_AC97
>> + tristate
>> + select SND_SOC_AC97_BUS
>> +
>> config SND_S3C24XX_SOC_NEO1973_WM8753
>> tristate "SoC I2S Audio support for NEO1973 - WM8753"
>> depends on SND_S3C24XX_SOC && MACH_NEO1973_GTA01
>> diff --git a/sound/soc/s3c24xx/Makefile b/sound/soc/s3c24xx/Makefile
>> index b744657..b7411bd 100644
>> --- a/sound/soc/s3c24xx/Makefile
>> +++ b/sound/soc/s3c24xx/Makefile
>> @@ -4,12 +4,14 @@ snd-soc-s3c24xx-i2s-objs := s3c24xx-i2s.o
>> snd-soc-s3c2412-i2s-objs := s3c2412-i2s.o
>> snd-soc-s3c64xx-i2s-objs := s3c64xx-i2s.o
>> snd-soc-s3c2443-ac97-objs := s3c2443-ac97.o
>> +snd-soc-s3c-ac97-objs := s3c-ac97.o
>> snd-soc-s3c-i2s-v2-objs := s3c-i2s-v2.o
>> snd-soc-s3c-pcm-objs := s3c-pcm.o
>>
>> obj-$(CONFIG_SND_S3C24XX_SOC) += snd-soc-s3c24xx.o
>> obj-$(CONFIG_SND_S3C24XX_SOC_I2S) += snd-soc-s3c24xx-i2s.o
>> obj-$(CONFIG_SND_S3C2443_SOC_AC97) += snd-soc-s3c2443-ac97.o
>> +obj-$(CONFIG_SND_S3C_SOC_AC97) += snd-soc-s3c-ac97.o
>> obj-$(CONFIG_SND_S3C2412_SOC_I2S) += snd-soc-s3c2412-i2s.o
>> obj-$(CONFIG_SND_S3C64XX_SOC_I2S) += snd-soc-s3c64xx-i2s.o
>> obj-$(CONFIG_SND_S3C_I2SV2_SOC) += snd-soc-s3c-i2s-v2.o
>> @@ -37,4 +39,3 @@ obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC) += snd-soc-s3c24xx-simtec.o
>> obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC_HERMES) += snd-soc-s3c24xx-simtec-hermes.o
>> obj-$(CONFIG_SND_S3C24XX_SOC_SIMTEC_TLV320AIC23) += snd-soc-s3c24xx-simtec-tlv320aic23.o
>> obj-$(CONFIG_SND_S3C64XX_SOC_WM8580) += snd-soc-smdk64xx-wm8580.o
>> -
>> diff --git a/sound/soc/s3c24xx/s3c-ac97.c b/sound/soc/s3c24xx/s3c-ac97.c
>> new file mode 100644
>> index 0000000..acb8f51
>> --- /dev/null
>> +++ b/sound/soc/s3c24xx/s3c-ac97.c
>> @@ -0,0 +1,535 @@
>> +/* sound/soc/s3c24xx/s3c-ac97.c
>> + *
>> + * ALSA SoC Audio Layer - S3C AC97 Controller driver
>> + * Evolved from s3c2443-ac97.c
>> + *
>> + * Copyright (c) 2010 Samsung Electronics Co. Ltd
>> + * Author: Jaswinder Singh <jassi.brar at samsung.com>
>> + * Credits: Graeme Gregory, Sean Choi
>> + *
>> + * 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/io.h>
>> +#include <linux/delay.h>
>> +#include <linux/clk.h>
>> +
>> +#include <sound/soc.h>
>> +
>> +#include <plat/regs-ac97.h>
>> +#include <mach/dma.h>
>> +#include <plat/audio.h>
>> +
>> +#include "s3c-dma.h"
>> +#include "s3c-ac97.h"
>> +
>> +#define AC_CMD_ADDR(x) (x << 16)
>> +#define AC_CMD_DATA(x) (x & 0xffff)
>> +
>> +struct s3c_ac97_info {
>> + unsigned state;
>> + struct clk *ac97_clk;
>> + void __iomem *regs;
>> + struct mutex lock;
>> + struct completion done;
>> +};
>> +static struct s3c_ac97_info s3c_ac97;
>> +
>> +static struct s3c2410_dma_client s3c_dma_client_out = {
>> + .name = "AC97 PCMOut"
>> +};
>> +
>> +static struct s3c2410_dma_client s3c_dma_client_in = {
>> + .name = "AC97 PCMIn"
>> +};
>> +
>> +static struct s3c2410_dma_client s3c_dma_client_micin = {
>> + .name = "AC97 MicIn"
>> +};
>> +
>> +static struct s3c_dma_params s3c_ac97_pcm_out = {
>> + .client = &s3c_dma_client_out,
>> + .dma_size = 4,
>> +};
>> +
>> +static struct s3c_dma_params s3c_ac97_pcm_in = {
>> + .client = &s3c_dma_client_in,
>> + .dma_size = 4,
>> +};
>> +
>> +static struct s3c_dma_params s3c_ac97_mic_in = {
>> + .client = &s3c_dma_client_micin,
>> + .dma_size = 4,
>> +};
>> +
>> +static void s3c_ac97_cold_reset(struct snd_ac97 *ac97)
>> +{
>> + writel(S3C_AC97_GLBCTRL_COLDRESET,
>> + s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +
>> + writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +}
>> +
>> +static void s3c_ac97_warm_reset(struct snd_ac97 *ac97)
>> +{
>> + writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +
>> + writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +}
>
> It would be nice t osee something to convert a 'struct snd_ac97' to a
> 'struct s3c_ac97_info' as this is being passed in to most place and
> would also help if there is ever >1 block.
ok, will find a way to do that.
>> +static void s3c_ac97_activate(struct snd_ac97 *ac97)
>> +{
>> + u32 ac_glbctrl, stat;
>> +
>> + stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7;
>> + switch (stat) {
>> + case S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE:
>> + return;
>> + case S3C_AC97_GLBSTAT_MAINSTATE_READY:
>> + case S3C_AC97_GLBSTAT_MAINSTATE_INIT:
>> + break;
>> + default:
>> + s3c_ac97_cold_reset(ac97);
>> + s3c_ac97_warm_reset(ac97);
>> + break;
>> + }
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +
>> + ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + msleep(1);
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + INIT_COMPLETION(s3c_ac97.done);
>> +
>> + if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
>> + printk(KERN_ERR "AC97: Unable to activate!");
>> +}
>> +
>> +static unsigned short s3c_ac97_read(struct snd_ac97 *ac97,
>> + unsigned short reg)
>> +{
>> + u32 ac_glbctrl, ac_codec_cmd;
>> + u32 stat, addr, data;
>> +
>> + mutex_lock(&s3c_ac97.lock);
>> +
>> + s3c_ac97_activate(ac97);
>> +
>> + ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> + ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg);
>> + writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> +
>> + udelay(50);
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + INIT_COMPLETION(s3c_ac97.done);
>> +
>> + if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
>> + printk(KERN_ERR "AC97: Unable to read!");
>> +
>> + stat = readl(s3c_ac97.regs + S3C_AC97_STAT);
>> + addr = (stat >> 16) & 0x7f;
>> + data = (stat & 0xffff);
>> +
>> + if (addr != reg)
>> + printk(KERN_ERR "s3c-ac97: req addr = %02x,"
>> + " rep addr = %02x\n", reg, addr);
>> +
>> + mutex_unlock(&s3c_ac97.lock);
>> +
>> + return (unsigned short)data;
>> +}
>> +
>> +static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
>> + unsigned short val)
>> +{
>> + u32 ac_glbctrl, ac_codec_cmd;
>> +
>> + mutex_lock(&s3c_ac97.lock);
>> +
>> + s3c_ac97_activate(ac97);
>> +
>> + ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> + ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val);
>> + writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> +
>> + udelay(50);
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + INIT_COMPLETION(s3c_ac97.done);
>> +
>> + if (!wait_for_completion_timeout(&s3c_ac97.done, HZ))
>> + printk(KERN_ERR "AC97: Unable to write!");
>> +
>> + ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> + ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ;
>> + writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD);
>> +
>> + mutex_unlock(&s3c_ac97.lock);
>> +}
>> +
>> +static irqreturn_t s3c_ac97_irq(int irq, void *dev_id)
>> +{
>> + u32 ac_glbctrl, ac_glbstat;
>> +
>> + ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT);
>> +
>> + if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) {
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE;
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl |= (1<<30); /* Clear interrupt */
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + complete(&s3c_ac97.done);
>> + }
>> +
>> + return IRQ_HANDLED;
>> +}
>> +
>> +struct snd_ac97_bus_ops soc_ac97_ops = {
>> + .read = s3c_ac97_read,
>> + .write = s3c_ac97_write,
>> + .warm_reset = s3c_ac97_warm_reset,
>> + .reset = s3c_ac97_cold_reset,
>> +};
>> +EXPORT_SYMBOL_GPL(soc_ac97_ops);
>> +
>> +static int s3c_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 = &s3c_ac97_pcm_out;
>> + else
>> + cpu_dai->dma_data = &s3c_ac97_pcm_in;
>> +
>> + return 0;
>> +}
>> +
>> +static int s3c_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(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
>> + ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK;
>> + else
>> + ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK;
>> +
>> + 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:
>> + break;
>> + }
>> +
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);
>> +
>> + return 0;
>> +}
>> +
>> +static int s3c_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 = &s3c_ac97_mic_in;
>> +
>> + return 0;
>> +}
>> +
>> +static int s3c_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(s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> + ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK;
>> +
>> + switch (cmd) {
>> + case SNDRV_PCM_TRIGGER_START:
>> + case SNDRV_PCM_TRIGGER_RESUME:
>> + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
>> + ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA;
>> + break;
>> +
>> + case SNDRV_PCM_TRIGGER_STOP:
>> + case SNDRV_PCM_TRIGGER_SUSPEND:
>> + case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
>> + break;
>> + }
>> +
>> + writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
>> +
>> + s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STARTED);
>> +
>> + return 0;
>> +}
>> +
>> +#define S3C_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
>> + SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
>> + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
>> + SNDRV_PCM_RATE_48000)
>> +
>> +static struct snd_soc_dai_ops s3c_ac97_dai_ops = {
>> + .hw_params = s3c_ac97_hw_params,
>> + .trigger = s3c_ac97_trigger,
>> +};
>> +
>> +static struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = {
>> + .hw_params = s3c_ac97_hw_mic_params,
>> + .trigger = s3c_ac97_mic_trigger,
>> +};
>> +
>> +struct snd_soc_dai s3c_ac97_dai[] = {
>> + [S3C_AC97_DAI_PCM] = {
>> + .name = "s3c-ac97",
>> + .id = S3C_AC97_DAI_PCM,
>> + .ac97_control = 1,
>> + .playback = {
>> + .stream_name = "AC97 Playback",
>> + .channels_min = 2,
>> + .channels_max = 2,
>> + .rates = S3C_AC97_RATES,
>> + .formats = SNDRV_PCM_FMTBIT_S16_LE,},
>> + .capture = {
>> + .stream_name = "AC97 Capture",
>> + /* NOTE: If the codec ouputs just one slot,
>> + * it *seems* our AC97 controller reads the only
>> + * valid slot(if either 3 or 4) for PCM-In.
>> + * For such cases, we record Mono.
>> + */
>> + .channels_min = 1,
>> + .channels_max = 2,
>> + .rates = S3C_AC97_RATES,
>> + .formats = SNDRV_PCM_FMTBIT_S16_LE,},
>> + .ops = &s3c_ac97_dai_ops,
>> + },
>> + [S3C_AC97_DAI_MIC] = {
>> + .name = "s3c-ac97-mic",
>> + .id = S3C_AC97_DAI_MIC,
>> + .ac97_control = 1,
>> + .capture = {
>> + .stream_name = "AC97 Mic Capture",
>> + .channels_min = 1,
>> + /* NOTE: If the codec(like WM9713) can't ouput just
>> + * one slot, it *seems* our AC97 controller reads
>> + * two slots(if one of them is Slot-6) for MIC also.
>> + * For such cases, we record Stereo.
>> + */
>> + .channels_max = 2,
>> + .rates = S3C_AC97_RATES,
>> + .formats = SNDRV_PCM_FMTBIT_S16_LE,},
>> + .ops = &s3c_ac97_mic_dai_ops,
>> + },
>> +};
>> +EXPORT_SYMBOL_GPL(s3c_ac97_dai);
>> +
>> +static __devinit int s3c_ac97_probe(struct platform_device *pdev)
>> +{
>> + struct resource *mem_res, *dmatx_res, *dmarx_res, *dmamic_res, *irq_res;
>> + struct s3c_audio_pdata *ac97_pdata;
>> + int ret;
>> +
>> + ac97_pdata = pdev->dev.platform_data;
>> + if (!ac97_pdata || !ac97_pdata->cfg_gpio) {
>> + dev_err(&pdev->dev, "cfg_gpio callback not provided!\n");
>> + return -EINVAL;
>> + }
>> +
>> + /* Check for availability of necessary resource */
>> + dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
>> + if (!dmatx_res) {
>> + dev_err(&pdev->dev, "Unable to get AC97-TX dma resource\n");
>> + return -ENXIO;
>> + }
>> +
>> + dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
>> + if (!dmarx_res) {
>> + dev_err(&pdev->dev, "Unable to get AC97-RX dma resource\n");
>> + return -ENXIO;
>> + }
>> +
>> + dmamic_res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
>> + if (!dmamic_res) {
>> + dev_err(&pdev->dev, "Unable to get AC97-MIC dma resource\n");
>> + return -ENXIO;
>> + }
>> +
>> + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> + if (!mem_res) {
>> + dev_err(&pdev->dev, "Unable to get register resource\n");
>> + return -ENXIO;
>> + }
>> +
>> + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>> + if (!irq_res) {
>> + dev_err(&pdev->dev, "AC97 IRQ not provided!\n");
>> + return -ENXIO;
>> + }
>> +
>> + if (!request_mem_region(mem_res->start,
>> + resource_size(mem_res), "s3c-ac97")) {
>> + dev_err(&pdev->dev, "Unable to request register region\n");
>> + return -EBUSY;
>> + }
>> +
>> + s3c_ac97_pcm_out.channel = dmatx_res->start;
>> + s3c_ac97_pcm_out.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
>> + s3c_ac97_pcm_in.channel = dmarx_res->start;
>> + s3c_ac97_pcm_in.dma_addr = mem_res->start + S3C_AC97_PCM_DATA;
>> + s3c_ac97_mic_in.channel = dmamic_res->start;
>> + s3c_ac97_mic_in.dma_addr = mem_res->start + S3C_AC97_MIC_DATA;
>> +
>> + init_completion(&s3c_ac97.done);
>> + mutex_init(&s3c_ac97.lock);
>> +
>> + s3c_ac97.regs = ioremap(mem_res->start, resource_size(mem_res));
>> + if (s3c_ac97.regs == NULL) {
>> + dev_err(&pdev->dev, "Unable to ioremap register region\n");
>> + ret = -ENXIO;
>> + goto lb1;
>> + }
>> +
>> + s3c_ac97.ac97_clk = clk_get(&pdev->dev, "ac97");
>> + if (IS_ERR(s3c_ac97.ac97_clk)) {
>> + dev_err(&pdev->dev, "s3c-ac97 failed to get ac97_clock\n");
>> + ret = -ENODEV;
>> + goto lb2;
>> + }
>> + clk_enable(s3c_ac97.ac97_clk);
>> +
>> + if (ac97_pdata->cfg_gpio(pdev)) {
>> + dev_err(&pdev->dev, "Unable to configure gpio\n");
>> + ret = -EINVAL;
>> + goto lb3;
>> + }
>> +
>> + ret = request_irq(irq_res->start, s3c_ac97_irq,
>> + IRQF_DISABLED, "AC97", NULL);
>> + if (ret < 0) {
>> + printk(KERN_ERR "s3c-ac97: interrupt request failed.\n");
>> + goto lb4;
>> + }
>> +
>> + s3c_ac97_dai[S3C_AC97_DAI_PCM].dev = &pdev->dev;
>> + s3c_ac97_dai[S3C_AC97_DAI_MIC].dev = &pdev->dev;
>> +
>> + ret = snd_soc_register_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));
>> + if (ret)
>> + goto lb5;
>> +
>> + return 0;
>> +
>> +lb5:
>> + free_irq(irq_res->start, NULL);
>> +lb4:
>> +lb3:
>> + clk_disable(s3c_ac97.ac97_clk);
>> + clk_put(s3c_ac97.ac97_clk);
>> +lb2:
>> + iounmap(s3c_ac97.regs);
>> +lb1:
>> + release_mem_region(mem_res->start, resource_size(mem_res));
>> +
>> + return ret;
>> +}
>> +
>> +static __devexit int s3c_ac97_remove(struct platform_device *pdev)
>> +{
>> + struct resource *mem_res, *irq_res;
>> +
>> + snd_soc_unregister_dais(s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai));
>> +
>> + irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
>> + if (irq_res)
>> + free_irq(irq_res->start, NULL);
>> +
>> + clk_disable(s3c_ac97.ac97_clk);
>> + clk_put(s3c_ac97.ac97_clk);
>> +
>> + iounmap(s3c_ac97.regs);
>> +
>> + mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> + if (mem_res)
>> + release_mem_region(mem_res->start, resource_size(mem_res));
>> +
>> + return 0;
>> +}
>> +
>> +static struct platform_driver s3c_ac97_driver = {
>> + .probe = s3c_ac97_probe,
>> + .remove = s3c_ac97_remove,
>> + .driver = {
>> + .name = "s3c-ac97",
>> + .owner = THIS_MODULE,
>> + },
>> +};
>> +
>> +static int __init s3c_ac97_init(void)
>> +{
>> + return platform_driver_register(&s3c_ac97_driver);
>> +}
>> +module_init(s3c_ac97_init);
>> +
>> +static void __exit s3c_ac97_exit(void)
>> +{
>> + platform_driver_unregister(&s3c_ac97_driver);
>> +}
>> +module_exit(s3c_ac97_exit);
>> +
>> +MODULE_AUTHOR("Jaswinder Singh, <jassi.brar at samsung.com>");
>> +MODULE_DESCRIPTION("AC97 driver for the Samsung SoC");
>> +MODULE_LICENSE("GPL");
>> diff --git a/sound/soc/s3c24xx/s3c-ac97.h b/sound/soc/s3c24xx/s3c-ac97.h
>> new file mode 100644
>> index 0000000..2781983
>> --- /dev/null
>> +++ b/sound/soc/s3c24xx/s3c-ac97.h
>> @@ -0,0 +1,23 @@
>> +/* sound/soc/s3c24xx/s3c-ac97.h
>> + *
>> + * ALSA SoC Audio Layer - S3C AC97 Controller driver
>> + * Evolved from s3c2443-ac97.h
>> + *
>> + * Copyright (c) 2010 Samsung Electronics Co. Ltd
>> + * Author: Jaswinder Singh <jassi.brar at samsung.com>
>> + * Credits: Graeme Gregory, Sean Choi
>> + *
>> + * 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.
>> + */
>> +
>> +#ifndef __S3C_AC97_H_
>> +#define __S3C_AC97_H_
>> +
>> +#define S3C_AC97_DAI_PCM 0
>> +#define S3C_AC97_DAI_MIC 1
>> +
>> +extern struct snd_soc_dai s3c_ac97_dai[];
>> +
>> +#endif /* __S3C_AC97_H_ */
>> --
>> 1.6.2.5
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
>> the body of a message to majordomo at vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
> Out of interest, how similar are the two blocks and could the s3c2443
> case be elided into this one with some minimal checks for which one is
> currently in use?
Same except for a few 'dead' bits in 2443.
The only reason I didn't submit patch to delete s3c2443-ac97.c is that my
smdk2443 didn't produce any sound. (btw the s3c2443-ac97.c also fails to do so)
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