diff options
author | Graeme Gregory <gg@opensource.wolfsonmicro.com> | 2007-05-14 11:02:51 +0200 |
---|---|---|
committer | Jaroslav Kysela <perex@suse.cz> | 2007-07-20 11:11:15 +0200 |
commit | 050f05eaec1c7c5434c78d010ada3cfeb7d0b3b3 (patch) | |
tree | 3672da69afdb2961530c712b292df1337c77d939 /sound/soc/s3c24xx/s3c2443-ac97.c | |
parent | c111b8de975a357ff58e73047e9af48afacf2347 (diff) | |
download | lwn-050f05eaec1c7c5434c78d010ada3cfeb7d0b3b3.tar.gz lwn-050f05eaec1c7c5434c78d010ada3cfeb7d0b3b3.zip |
[ALSA] ASoC S3C24xx machine drivers - s3c2443-AC97
This patch adds AC97 support to the Samsung S3C2443 CPU.
Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/soc/s3c24xx/s3c2443-ac97.c')
-rw-r--r-- | sound/soc/s3c24xx/s3c2443-ac97.c | 401 |
1 files changed, 401 insertions, 0 deletions
diff --git a/sound/soc/s3c24xx/s3c2443-ac97.c b/sound/soc/s3c24xx/s3c2443-ac97.c new file mode 100644 index 000000000000..75acf7ef5528 --- /dev/null +++ b/sound/soc/s3c24xx/s3c2443-ac97.c @@ -0,0 +1,401 @@ +/* + * 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/arch/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"); |