[alsa-devel] [PATCH v2] NUC900/audio: add nuc900 audio driver support
Liam Girdwood
lrg at slimlogic.co.uk
Wed May 19 12:55:24 CEST 2010
On Wed, 2010-05-19 at 16:07 +0800, Wan ZongShun wrote:
> Hi Mark,
>
> How about this patch?
> Could it be merged into mainline?
Some minor comments inline.
>
> Thanks!
>
> 在 2010年5月18日 下午1:41，Wan ZongShun <mcuos.com at gmail.com> 写道：
> > Dear Mark,
> >
> > I have modified some codes according to your comments,
> > now I submit the patch as v2 again.
> >
> > Thanks a lot for your help.
> >
> > Signed-off-by: Wan ZongShun<mcuos.com at gmail.com>
> > ---
> > sound/soc/Kconfig | 1 +
> > sound/soc/Makefile | 1 +
> > sound/soc/nuc900/Kconfig | 27 +++
> > sound/soc/nuc900/Makefile | 11 +
> > sound/soc/nuc900/nuc900-ac97.c | 443 +++++++++++++++++++++++++++++++++++++++
> > sound/soc/nuc900/nuc900-audio.c | 81 +++++++
> > sound/soc/nuc900/nuc900-auido.h | 121 +++++++++++
> > sound/soc/nuc900/nuc900-pcm.c | 352 +++++++++++++++++++++++++++++++
> > 8 files changed, 1037 insertions(+), 0 deletions(-)
> > create mode 100644 sound/soc/nuc900/Kconfig
> > create mode 100644 sound/soc/nuc900/Makefile
> > create mode 100644 sound/soc/nuc900/nuc900-ac97.c
> > create mode 100644 sound/soc/nuc900/nuc900-audio.c
> > create mode 100644 sound/soc/nuc900/nuc900-auido.h
> > create mode 100644 sound/soc/nuc900/nuc900-pcm.c
> >
> > diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
> > index b1749bc..6e04fc2 100644
> > --- a/sound/soc/Kconfig
> > +++ b/sound/soc/Kconfig
> > @@ -30,6 +30,7 @@ source "sound/soc/blackfin/Kconfig"
> > source "sound/soc/davinci/Kconfig"
> > source "sound/soc/fsl/Kconfig"
> > source "sound/soc/imx/Kconfig"
> > +source "sound/soc/nuc900/Kconfig"
> > source "sound/soc/omap/Kconfig"
> > source "sound/soc/pxa/Kconfig"
> > source "sound/soc/s3c24xx/Kconfig"
> > diff --git a/sound/soc/Makefile b/sound/soc/Makefile
> > index 1470141..ccec241 100644
> > --- a/sound/soc/Makefile
> > +++ b/sound/soc/Makefile
> > @@ -8,6 +8,7 @@ obj-$(CONFIG_SND_SOC) += blackfin/
> > obj-$(CONFIG_SND_SOC) += davinci/
> > obj-$(CONFIG_SND_SOC) += fsl/
> > obj-$(CONFIG_SND_SOC) += imx/
> > +obj-$(CONFIG_SND_SOC) += nuc900/
> > obj-$(CONFIG_SND_SOC) += omap/
> > obj-$(CONFIG_SND_SOC) += pxa/
> > obj-$(CONFIG_SND_SOC) += s3c24xx/
> > diff --git a/sound/soc/nuc900/Kconfig b/sound/soc/nuc900/Kconfig
> > new file mode 100644
> > index 0000000..a0ed1c6
> > --- /dev/null
> > +++ b/sound/soc/nuc900/Kconfig
> > @@ -0,0 +1,27 @@
> > +##
> > +## NUC900 series AC97 API
> > +##
> > +config SND_SOC_NUC900
> > + tristate "SoC Audio for NUC900 series"
> > + depends on ARCH_W90X900
> > + help
> > + This option enables support for AC97 mode on the NUC900 SoC.
> > +
> > +config SND_SOC_NUC900_AC97
> > + tristate
> > + select AC97_BUS
> > + select SND_AC97_CODEC
> > + select SND_SOC_AC97_BUS
> > +
> > +
> > +##
> > +## Boards
> > +##
> > +config SND_SOC_NUC900EVB
> > + tristate "NUC900 AC97 support for demo board"
> > + depends on SND_SOC_NUC900
> > + select SND_SOC_NUC900_AC97
> > + select SND_SOC_AC97_CODEC
> > + help
> > + Select this option to enable audio (AC97) on the
> > + NUC900 demoboard.
> > diff --git a/sound/soc/nuc900/Makefile b/sound/soc/nuc900/Makefile
> > new file mode 100644
> > index 0000000..7e46c71
> > --- /dev/null
> > +++ b/sound/soc/nuc900/Makefile
> > @@ -0,0 +1,11 @@
> > +# NUC900 series audio
> > +snd-soc-nuc900-pcm-objs := nuc900-pcm.o
> > +snd-soc-nuc900-ac97-objs := nuc900-ac97.o
> > +
> > +obj-$(CONFIG_SND_SOC_NUC900) += snd-soc-nuc900-pcm.o
> > +obj-$(CONFIG_SND_SOC_NUC900_AC97) += snd-soc-nuc900-ac97.o
> > +
> > +# Boards
> > +snd-soc-nuc900-audio-objs := nuc900-audio.o
> > +
> > +obj-$(CONFIG_SND_SOC_NUC900EVB) += snd-soc-nuc900-audio.o
> > diff --git a/sound/soc/nuc900/nuc900-ac97.c b/sound/soc/nuc900/nuc900-ac97.c
> > new file mode 100644
> > index 0000000..2c345e2
> > --- /dev/null
> > +++ b/sound/soc/nuc900/nuc900-ac97.c
> > @@ -0,0 +1,443 @@
> > +/*
> > + * Copyright (c) 2009-2010 Nuvoton technology corporation.
> > + *
> > + * Wan ZongShun <mcuos.com at gmail.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation;version 2 of the License.
> > + *
> > + */
> > +
> > +#include <linux/init.h>
> > +#include <linux/module.h>
> > +#include <linux/slab.h>
> > +#include <linux/device.h>
> > +#include <linux/delay.h>
> > +#include <linux/mutex.h>
> > +#include <linux/suspend.h>
> > +#include <sound/core.h>
> > +#include <sound/pcm.h>
> > +#include <sound/initval.h>
> > +#include <sound/soc.h>
> > +#include <linux/device.h>
> > +#include <linux/clk.h>
> > +
> > +#include <mach/mfp.h>
> > +
> > +#include "nuc900-auido.h"
> > +
> > +static DEFINE_MUTEX(ac97_mutex);
> > +struct nuc900_audio *nuc900_ac97_data;
> > +
> > +static int nuc900_checkready(void)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > +
> > + if (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS0) & CODEC_READY))
> > + return -EPERM;
> > +
> > + return 0;
> > +}
> > +
> > +/* AC97 controller reads codec register */
> > +static unsigned short nuc900_ac97_read(struct snd_ac97 *ac97,
> > + unsigned short reg)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + unsigned long timeout = 0x10000, val;
> > +
> > + mutex_lock(&ac97_mutex);
> > +
> > + val = nuc900_checkready();
> > + if (!!val) {
> > + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
> > + goto out;
> > + }
> > +
> > + /* set the R_WB bit and write register index */
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, R_WB | reg);
> > +
> > + /* set the valid frame bit and valid slots */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
> > + val |= (VALID_FRAME | SLOT1_VALID);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
> > +
> > + udelay(100);
> > +
> > + /* polling the AC_R_FINISH */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
> > + val &= AC_R_FINISH;
> > + while (!val && timeout--)
> > + mdelay(1);
> > +
> > + if (!timeout) {
> > + dev_err(nuc900_audio->dev, "AC97 read register time out !\n");
> > + val = -EPERM;
> > + goto out;
> > + }
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0) ;
> > + val &= ~SLOT1_VALID;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
> > +
> > + if (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS1) >> 2 != reg) {
> > + dev_err(nuc900_audio->dev,
> > + "R_INDEX of REG_ACTL_ACIS1 not match!\n");
> > + }
> > +
> > + udelay(100);
> > + val = (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS2) & 0xFFFF);
> > +
> > +out:
> > + mutex_unlock(&ac97_mutex);
> > + return val;
> > +}
> > +
> > +/* AC97 controller writes to codec register */
> > +static void nuc900_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
> > + unsigned short val)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + unsigned long tmp, timeout = 0x10000;
> > +
> > + mutex_lock(&ac97_mutex);
> > +
> > + tmp = nuc900_checkready();
> > + if (!!tmp)
> > + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
> > +
> > + /* clear the R_WB bit and write register index */
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, reg);
> > +
> > + /* write register value */
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS2, val);
> > +
> > + /* set the valid frame bit and valid slots */
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
> > + tmp |= SLOT1_VALID | SLOT2_VALID | VALID_FRAME;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
> > +
> > + udelay(100);
> > +
> > + /* polling the AC_W_FINISH */
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
> > + tmp &= AC_W_FINISH;
> > + while (tmp && timeout--)
> > + mdelay(1);
> > +
> > + if (!timeout)
> > + dev_err(nuc900_audio->dev, "AC97 write register time out !\n");
> > +
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
> > + tmp &= ~(SLOT1_VALID | SLOT2_VALID);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
> > +
> > + mutex_unlock(&ac97_mutex);
> > +
> > +}
> > +
> > +static void nuc900_ac97_warm_reset(struct snd_ac97 *ac97)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + unsigned long val;
> > +
> > + mutex_lock(&ac97_mutex);
> > +
> > + /* warm reset AC 97 */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
> > + val |= AC_W_RES;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
> > +
> > + udelay(1000);
> > +
> > + val = nuc900_checkready();
> > + if (!!val)
> > + dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
> > +
> > + mutex_unlock(&ac97_mutex);
> > +}
> > +
> > +static void nuc900_ac97_cold_reset(struct snd_ac97 *ac97)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + unsigned long val;
> > +
> > + mutex_lock(&ac97_mutex);
> > +
> > + /* reset Audio Controller */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + val |= ACTL_RESET_BIT;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + udelay(1000);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + val &= (~ACTL_RESET_BIT);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + udelay(1000);
> > +
> > + /* reset AC-link interface */
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + val |= AC_RESET;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + udelay(1000);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + val &= ~AC_RESET;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + udelay(1000);
> > +
> > + /* cold reset AC 97 */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
> > + val |= AC_C_RES;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
> > +
> > + udelay(1000);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
> > + val &= (~AC_C_RES);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
> > +
> > + udelay(1000);
> > +
Just curious, these 1000 micro seconds delays all seem over spec for the
AC97 interface.
> > + mutex_unlock(&ac97_mutex);
> > +
> > +}
> > +
> > +/* AC97 controller operations */
> > +struct snd_ac97_bus_ops soc_ac97_ops = {
> > + .read = nuc900_ac97_read,
> > + .write = nuc900_ac97_write,
> > + .reset = nuc900_ac97_cold_reset,
> > + .warm_reset = nuc900_ac97_warm_reset,
> > +}
> > +EXPORT_SYMBOL_GPL(soc_ac97_ops);
> > +
> > +static int nuc900_ac97_trigger(struct snd_pcm_substream *substream,
> > + int cmd, struct snd_soc_dai *dai)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + int ret, stype = SUBSTREAM_TYPE(substream);
> > + unsigned long val, tmp;
> > +
> > + ret = 0;
> > +
> > + switch (cmd) {
> > + case SNDRV_PCM_TRIGGER_START:
> > + case SNDRV_PCM_TRIGGER_RESUME:
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + if (PCM_TX == stype) {
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
> > + tmp |= (SLOT3_VALID | SLOT4_VALID | VALID_FRAME);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
> > +
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
> > + tmp |= (P_DMA_END_IRQ | P_DMA_MIDDLE_IRQ);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, tmp);
> > + val |= AC_PLAY;
> > + } else {
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
> > + tmp |= (R_DMA_END_IRQ | R_DMA_MIDDLE_IRQ);
> > +
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, tmp);
> > + val |= AC_RECORD;
> > + }
> > +
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + break;
> > + case SNDRV_PCM_TRIGGER_STOP:
> > + case SNDRV_PCM_TRIGGER_SUSPEND:
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > + if (PCM_TX == stype) {
> > + tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
> > + tmp &= ~(SLOT3_VALID | SLOT4_VALID);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
> > +
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, RESET_PRSR);
> > + val &= ~AC_PLAY;
> > + } else {
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, RESET_PRSR);
> > + val &= ~AC_RECORD;
> > + }
> > +
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > +
> > + break;
> > + default:
> > + ret = -EINVAL;
> > + }
> > +
> > + return ret;
> > +}
> > +
> > +static int nuc900_ac97_probe(struct platform_device *pdev,
> > + struct snd_soc_dai *dai)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > + unsigned long val;
> > +
> > + mutex_lock(&ac97_mutex);
> > +
> > + /* enable unit clock */
> > + clk_enable(nuc900_audio->clk);
> > +
> > + /* enable audio controller and AC-link interface */
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
> > + val |= (IIS_AC_PIN_SEL | ACLINK_EN);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
> > +
> > + mutex_unlock(&ac97_mutex);
> > +
> > + return 0;
> > +}
> > +
> > +static void nuc900_ac97_remove(struct platform_device *pdev,
> > + struct snd_soc_dai *dai)
> > +{
> > + struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
> > +
> > + clk_disable(nuc900_audio->clk);
> > +}
> > +
> > +static struct snd_soc_dai_ops nuc900_ac97_dai_ops = {
> > + .trigger = nuc900_ac97_trigger,
> > +};
> > +
> > +struct snd_soc_dai nuc900_ac97_dai = {
> > + .name = "nuc900-ac97",
> > + .probe = nuc900_ac97_probe,
> > + .remove = nuc900_ac97_remove,
> > + .ac97_control = 1,
> > + .playback = {
> > + .rates = SNDRV_PCM_RATE_8000_48000,
> > + .formats = SNDRV_PCM_FMTBIT_S16_LE,
> > + .channels_min = 1,
> > + .channels_max = 2,
> > + },
> > + .capture = {
> > + .rates = SNDRV_PCM_RATE_8000_48000,
> > + .formats = SNDRV_PCM_FMTBIT_S16_LE,
> > + .channels_min = 1,
> > + .channels_max = 2,
> > + },
> > + .ops = &nuc900_ac97_dai_ops,
> > +}
> > +EXPORT_SYMBOL_GPL(nuc900_ac97_dai);
> > +
> > +static int __devinit nuc900_ac97_drvprobe(struct platform_device *pdev)
> > +{
> > + struct nuc900_audio *nuc900_audio;
> > + int ret;
> > +
> > + if (nuc900_ac97_data)
> > + return -EBUSY;
> > +
> > + nuc900_audio = kzalloc(sizeof(struct nuc900_audio), GFP_KERNEL);
> > + if (!nuc900_audio)
> > + return -ENOMEM;
> > +
> > + spin_lock_init(&nuc900_audio->lock);
> > +
> > + nuc900_audio->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + if (!nuc900_audio->res) {
> > + ret = -ENODEV;
> > + goto out0;
> > + }
> > +
> > + if (!request_mem_region(nuc900_audio->res->start,
> > + resource_size(nuc900_audio->res), pdev->name)) {
> > + ret = -EBUSY;
> > + goto out0;
> > + }
> > +
> > + nuc900_audio->mmio = ioremap(nuc900_audio->res->start,
> > + resource_size(nuc900_audio->res));
> > + if (!nuc900_audio->mmio) {
> > + ret = -ENOMEM;
> > + goto out1;
> > + }
> > +
> > + nuc900_audio->clk = clk_get(&pdev->dev, NULL);
> > + if (IS_ERR(nuc900_audio->clk)) {
> > + ret = PTR_ERR(nuc900_audio->clk);
> > + goto out2;
> > + }
> > +
> > + nuc900_audio->irq_num = platform_get_irq(pdev, 0);
> > + if (!nuc900_audio->irq_num) {
> > + ret = -EBUSY;
> > + goto out2;
> > + }
> > +
> > + nuc900_ac97_data = nuc900_audio;
> > +
> > + nuc900_audio->dev = nuc900_ac97_dai.dev = &pdev->dev;
> > +
> > + ret = snd_soc_register_dai(&nuc900_ac97_dai);
> > + if (ret)
> > + goto out3;
> > +
> > + mfp_set_groupg(nuc900_audio->dev); /* enbale ac97 multifunction pin*/
> > +
> > + return 0;
> > +
> > +out3:
> > + clk_put(nuc900_audio->clk);
> > +out2:
> > + iounmap(nuc900_audio->mmio);
> > +out1:
> > + release_mem_region(nuc900_audio->res->start,
> > + resource_size(nuc900_audio->res));
> > +out0:
> > + kfree(nuc900_audio);
> > + return ret;
> > +}
> > +
> > +static int __devexit nuc900_ac97_drvremove(struct platform_device *pdev)
> > +{
> > +
> > + snd_soc_unregister_dai(&nuc900_ac97_dai);
> > +
> > + clk_put(nuc900_ac97_data->clk);
> > + iounmap(nuc900_ac97_data->mmio);
> > + release_mem_region(nuc900_ac97_data->res->start,
> > + resource_size(nuc900_ac97_data->res));
> > +
> > + nuc900_ac97_data = NULL;
> > +
> > + return 0;
> > +}
> > +
> > +static struct platform_driver nuc900_ac97_driver = {
> > + .driver = {
> > + .name = "nuc900-audio",
> > + .owner = THIS_MODULE,
> > + },
> > + .probe = nuc900_ac97_drvprobe,
> > + .remove = __devexit_p(nuc900_ac97_drvremove),
> > +};
> > +
> > +static int __init nuc900_ac97_init(void)
> > +{
> > + return platform_driver_register(&nuc900_ac97_driver);
> > +}
> > +
> > +static void __exit nuc900_ac97_exit(void)
> > +{
> > + platform_driver_unregister(&nuc900_ac97_driver);
> > +}
> > +
> > +module_init(nuc900_ac97_init);
> > +module_exit(nuc900_ac97_exit);
> > +
> > +MODULE_AUTHOR("Wan ZongShun <mcuos.com at gmail.com>");
> > +MODULE_DESCRIPTION("NUC900 AC97 SoC driver!");
> > +MODULE_LICENSE("GPL");
> > +MODULE_ALIAS("platform:nuc900-ac97");
> > +
> > diff --git a/sound/soc/nuc900/nuc900-audio.c b/sound/soc/nuc900/nuc900-audio.c
> > new file mode 100644
> > index 0000000..b33d5b8
> > --- /dev/null
> > +++ b/sound/soc/nuc900/nuc900-audio.c
> > @@ -0,0 +1,81 @@
> > +/*
> > + * Copyright (c) 2010 Nuvoton technology corporation.
> > + *
> > + * Wan ZongShun <mcuos.com at gmail.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation;version 2 of the License.
> > + *
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/moduleparam.h>
> > +#include <linux/timer.h>
> > +#include <linux/interrupt.h>
> > +#include <linux/platform_device.h>
> > +
> > +#include <sound/core.h>
> > +#include <sound/pcm.h>
> > +#include <sound/soc.h>
> > +#include <sound/soc-dapm.h>
> > +
> > +#include "../codecs/ac97.h"
> > +#include "nuc900-auido.h"
> > +
> > +static struct snd_soc_dai_link nuc900evb_ac97_dai = {
> > + .name = "AC97",
> > + .stream_name = "AC97 HiFi",
> > + .cpu_dai = &nuc900_ac97_dai,
> > + .codec_dai = &ac97_dai,
> > +};
> > +
> > +static struct snd_soc_card nuc900evb_audio_machine = {
> > + .name = "NUC900EVB_AC97",
> > + .dai_link = &nuc900evb_ac97_dai,
> > + .num_links = 1,
> > + .platform = &nuc900_soc_platform,
> > +};
> > +
> > +static struct snd_soc_device nuc900evb_ac97_devdata = {
> > + .card = &nuc900evb_audio_machine,
> > + .codec_dev = &soc_codec_dev_ac97,
> > +};
> > +
> > +static struct platform_device *nuc900evb_asoc_dev;
> > +
> > +static int __init nuc900evb_audio_init(void)
> > +{
> > + int ret;
> > +
> > + ret = -ENOMEM;
> > + nuc900evb_asoc_dev = platform_device_alloc("soc-audio", -1);
> > + if (!nuc900evb_asoc_dev)
> > + goto out;
> > +
> > + /* nuc900 board audio device */
> > + platform_set_drvdata(nuc900evb_asoc_dev, &nuc900evb_ac97_devdata);
> > +
> > + nuc900evb_ac97_devdata.dev = &nuc900evb_asoc_dev->dev;
> > + ret = platform_device_add(nuc900evb_asoc_dev);
> > +
> > + if (ret) {
> > + platform_device_put(nuc900evb_asoc_dev);
> > + nuc900evb_asoc_dev = NULL;
> > + }
> > +
> > +out:
> > + return ret;
> > +}
> > +
> > +static void __exit nuc900evb_audio_exit(void)
> > +{
> > + platform_device_unregister(nuc900evb_asoc_dev);
> > +}
> > +
> > +module_init(nuc900evb_audio_init);
> > +module_exit(nuc900evb_audio_exit);
> > +
> > +MODULE_LICENSE("GPL");
> > +MODULE_DESCRIPTION("NUC900 Series ASoC audio support");
> > +MODULE_AUTHOR("Wan ZongShun");
> > diff --git a/sound/soc/nuc900/nuc900-auido.h b/sound/soc/nuc900/nuc900-auido.h
> > new file mode 100644
> > index 0000000..95ac4ef
> > --- /dev/null
> > +++ b/sound/soc/nuc900/nuc900-auido.h
> > @@ -0,0 +1,121 @@
> > +/*
> > + * Copyright (c) 2010 Nuvoton technology corporation.
> > + *
> > + * Wan ZongShun <mcuos.com at gmail.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation;version 2 of the License.
> > + *
> > + */
> > +
> > +#ifndef _NUC900_AUDIO_H
> > +#define _NUC900_AUDIO_H
> > +
> > +#include <linux/io.h>
> > +
> > +/* Audio Control Registers */
> > +#define ACTL_CON 0x00
> > +#define ACTL_RESET 0x04
> > +#define ACTL_RDSTB 0x08
> > +#define ACTL_RDST_LENGTH 0x0C
> > +#define ACTL_RDSTC 0x10
> > +#define ACTL_RSR 0x14
> > +#define ACTL_PDSTB 0x18
> > +#define ACTL_PDST_LENGTH 0x1C
> > +#define ACTL_PDSTC 0x20
> > +#define ACTL_PSR 0x24
> > +#define ACTL_IISCON 0x28
> > +#define ACTL_ACCON 0x2C
> > +#define ACTL_ACOS0 0x30
> > +#define ACTL_ACOS1 0x34
> > +#define ACTL_ACOS2 0x38
> > +#define ACTL_ACIS0 0x3C
> > +#define ACTL_ACIS1 0x40
> > +#define ACTL_ACIS2 0x44
> > +#define ACTL_COUNTER 0x48
> > +
> > +/* bit definition of REG_ACTL_CON register */
> > +#define R_DMA_IRQ 0x1000
> > +#define T_DMA_IRQ 0x0800
> > +#define IIS_AC_PIN_SEL 0x0100
> > +#define FIFO_TH 0x0080
> > +#define ADC_EN 0x0010
> > +#define M80_EN 0x0008
> > +#define ACLINK_EN 0x0004
> > +#define IIS_EN 0x0002
> > +
> > +/* bit definition of REG_ACTL_RESET register */
> > +#define W5691_PLAY 0x20000
> > +#define ACTL_RESET_BIT 0x10000
> > +#define RECORD_RIGHT_CHNNEL 0x08000
> > +#define RECORD_LEFT_CHNNEL 0x04000
> > +#define PLAY_RIGHT_CHNNEL 0x02000
> > +#define PLAY_LEFT_CHNNEL 0x01000
> > +#define DAC_PLAY 0x00800
> > +#define ADC_RECORD 0x00400
> > +#define M80_PLAY 0x00200
> > +#define AC_RECORD 0x00100
> > +#define AC_PLAY 0x00080
> > +#define IIS_RECORD 0x00040
> > +#define IIS_PLAY 0x00020
> > +#define DAC_RESET 0x00010
> > +#define ADC_RESET 0x00008
> > +#define M80_RESET 0x00004
> > +#define AC_RESET 0x00002
> > +#define IIS_RESET 0x00001
> > +
> > +/* bit definition of REG_ACTL_ACCON register */
> > +#define AC_BCLK_PU_EN 0x20
> > +#define AC_R_FINISH 0x10
> > +#define AC_W_FINISH 0x08
> > +#define AC_W_RES 0x04
> > +#define AC_C_RES 0x02
> > +
> > +/* bit definition of ACTL_RSR register */
> > +#define R_FIFO_EMPTY 0x04
> > +#define R_DMA_END_IRQ 0x02
> > +#define R_DMA_MIDDLE_IRQ 0x01
> > +
> > +/* bit definition of ACTL_PSR register */
> > +#define P_FIFO_EMPTY 0x04
> > +#define P_DMA_END_IRQ 0x02
> > +#define P_DMA_MIDDLE_IRQ 0x01
> > +
> > +/* bit definition of ACTL_ACOS0 register */
> > +#define SLOT1_VALID 0x01
> > +#define SLOT2_VALID 0x02
> > +#define SLOT3_VALID 0x04
> > +#define SLOT4_VALID 0x08
> > +#define VALID_FRAME 0x10
> > +
> > +/* bit definition of ACTL_ACOS1 register */
> > +#define R_WB 0x80
> > +
> > +#define CODEC_READY 0x10
> > +#define RESET_PRSR 0x00
> > +#define AUDIO_WRITE(addr, val) __raw_writel(val, addr)
> > +#define AUDIO_READ(addr) __raw_readl(addr)
> > +#define PCM_TX 0
> > +#define PCM_RX 1
> > +#define SUBSTREAM_TYPE(substream) \
> > + ((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
Why are you redefining SNDRV_PCM_STREAM_PLAYBACK as PCM_TX. It makes the
code more difficult to read.
> > +
> > +struct nuc900_audio {
> > + void __iomem *mmio;
> > + spinlock_t lock;
> > + dma_addr_t dma_addr[2];
> > + unsigned long buffersize[2];
> > + unsigned long irq_num;
> > + struct snd_pcm_substream *substream;
> > + struct resource *res;
> > + struct clk *clk;
> > + struct device *dev;
> > +
> > +};
> > +
> > +extern struct nuc900_audio *nuc900_ac97_data;
> > +extern struct snd_soc_dai nuc900_ac97_dai;
> > +extern struct snd_soc_platform nuc900_soc_platform;
> > +
> > +#endif /*end _NUC900_AUDIO_H */
> > diff --git a/sound/soc/nuc900/nuc900-pcm.c b/sound/soc/nuc900/nuc900-pcm.c
> > new file mode 100644
> > index 0000000..32a503c
> > --- /dev/null
> > +++ b/sound/soc/nuc900/nuc900-pcm.c
> > @@ -0,0 +1,352 @@
> > +/*
> > + * Copyright (c) 2010 Nuvoton technology corporation.
> > + *
> > + * Wan ZongShun <mcuos.com at gmail.com>
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation;version 2 of the License.
> > + *
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/init.h>
> > +#include <linux/io.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/slab.h>
> > +#include <linux/dma-mapping.h>
> > +
> > +#include <sound/core.h>
> > +#include <sound/pcm.h>
> > +#include <sound/pcm_params.h>
> > +#include <sound/soc.h>
> > +
> > +#include <mach/hardware.h>
> > +
> > +#include "nuc900-auido.h"
> > +
> > +static const struct snd_pcm_hardware nuc900_pcm_hardware = {
> > + .info = SNDRV_PCM_INFO_INTERLEAVED |
> > + SNDRV_PCM_INFO_BLOCK_TRANSFER |
> > + SNDRV_PCM_INFO_MMAP |
> > + SNDRV_PCM_INFO_MMAP_VALID |
> > + SNDRV_PCM_INFO_PAUSE |
> > + SNDRV_PCM_INFO_RESUME,
> > + .formats = SNDRV_PCM_FMTBIT_S16_LE,
> > + .channels_min = 1,
> > + .channels_max = 2,
> > + .buffer_bytes_max = 4*1024,
> > + .period_bytes_min = 1*1024,
> > + .period_bytes_max = 4*1024,
> > + .periods_min = 1,
> > + .periods_max = 1024,
> > +};
> > +
> > +static int nuc900_dma_hw_params(struct snd_pcm_substream *substream,
> > + struct snd_pcm_hw_params *params)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > + unsigned long flags, stype = SUBSTREAM_TYPE(substream);
> > + int ret = 0;
> > +
> > + spin_lock_irqsave(&nuc900_audio->lock, flags);
> > +
> > + ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
> > + if (ret < 0)
> > + return ret;
> > +
> > + nuc900_audio->substream = substream;
> > + nuc900_audio->dma_addr[stype] = runtime->dma_addr;
> > + nuc900_audio->buffersize[stype] = params_buffer_bytes(params);
> > +
> > + spin_unlock_irqrestore(&nuc900_audio->lock, flags);
> > +
> > + return ret;
> > +}
> > +
> > +static void nuc900_update_dma_register(struct snd_pcm_substream *substream,
> > + dma_addr_t dma_addr, size_t count)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > + void __iomem *mmio_addr, *mmio_len;
> > +
> > + if (SUBSTREAM_TYPE(substream) == PCM_TX) {
> > + mmio_addr = nuc900_audio->mmio + ACTL_PDSTB;
> > + mmio_len = nuc900_audio->mmio + ACTL_PDST_LENGTH;
> > + } else {
> > + mmio_addr = nuc900_audio->mmio + ACTL_RDSTB;
> > + mmio_len = nuc900_audio->mmio + ACTL_RDST_LENGTH;
> > + }
> > +
> > + AUDIO_WRITE(mmio_addr, dma_addr);
> > + AUDIO_WRITE(mmio_len, count);
> > +}
> > +
> > +static void nuc900_dma_start(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > + unsigned long val;
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
> > + val |= (T_DMA_IRQ | R_DMA_IRQ);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
> > +}
> > +
> > +static void nuc900_dma_stop(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > + unsigned long val;
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
> > + val &= ~(T_DMA_IRQ | R_DMA_IRQ);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
> > +}
> > +
> > +static irqreturn_t nuc900_dma_interrupt(int irq, void *dev_id)
> > +{
> > + struct snd_pcm_substream *substream = dev_id;
> > + struct nuc900_audio *nuc900_audio = substream->runtime->private_data;
> > + unsigned long val;
> > +
> > + spin_lock(&nuc900_audio->lock);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
> > +
> > + if (val & R_DMA_IRQ) {
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | R_DMA_IRQ);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
> > +
> > + if (val & R_DMA_MIDDLE_IRQ) {
> > + val |= R_DMA_MIDDLE_IRQ;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
> > + }
> > +
> > + if (val & R_DMA_END_IRQ) {
> > + val |= R_DMA_END_IRQ;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, val);
> > + }
> > + } else if (val & T_DMA_IRQ) {
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val | T_DMA_IRQ);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
> > +
> > + if (val & P_DMA_MIDDLE_IRQ) {
> > + val |= P_DMA_MIDDLE_IRQ;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
> > + }
> > +
> > + if (val & P_DMA_END_IRQ) {
> > + val |= P_DMA_END_IRQ;
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, val);
> > + }
> > + } else {
> > + dev_err(nuc900_audio->dev, "Wrong DMA interrupt status!\n");
> > + spin_unlock(&nuc900_audio->lock);
> > + return IRQ_HANDLED;
> > + }
> > +
> > + spin_unlock(&nuc900_audio->lock);
> > +
> > + snd_pcm_period_elapsed(substream);
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static int nuc900_dma_hw_free(struct snd_pcm_substream *substream)
> > +{
> > + snd_pcm_lib_free_pages(substream);
> > + return 0;
> > +}
> > +
> > +static int nuc900_dma_prepare(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > + unsigned long flags, val, stype = SUBSTREAM_TYPE(substream);;
> > +
> > + spin_lock_irqsave(&nuc900_audio->lock, flags);
> > +
> > + nuc900_update_dma_register(substream,
> > + nuc900_audio->dma_addr[stype], nuc900_audio->buffersize[stype]);
> > +
> > + val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
> > +
> > + switch (runtime->channels) {
> > + case 1:
> > + if (PCM_TX == stype) {
> > + val &= ~(PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
> > + val |= PLAY_RIGHT_CHNNEL;
> > + } else {
> > + val &= ~(RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
> > + val |= RECORD_RIGHT_CHNNEL;
> > + }
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > + break;
> > + case 2:
> > + if (PCM_TX == stype)
> > + val |= (PLAY_LEFT_CHNNEL | PLAY_RIGHT_CHNNEL);
> > + else
> > + val |= (RECORD_LEFT_CHNNEL | RECORD_RIGHT_CHNNEL);
> > + AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
> > + break;
> > + default:
> > + return -EINVAL;
> > + }
> > + spin_unlock_irqrestore(&nuc900_audio->lock, flags);
> > + return 0;
> > +}
> > +
> > +static int nuc900_dma_trigger(struct snd_pcm_substream *substream, int cmd)
> > +{
> > + int ret = 0;
> > +
> > + switch (cmd) {
> > + case SNDRV_PCM_TRIGGER_START:
> > + case SNDRV_PCM_TRIGGER_RESUME:
> > + nuc900_dma_start(substream);
> > + break;
> > +
> > + case SNDRV_PCM_TRIGGER_STOP:
> > + case SNDRV_PCM_TRIGGER_SUSPEND:
> > + nuc900_dma_stop(substream);
> > + break;
> > +
> > + default:
> > + ret = -EINVAL;
> > + break;
> > + }
> > +
> > + return ret;
> > +}
> > +
> > +int nuc900_dma_getposition(struct snd_pcm_substream *substream,
> > + dma_addr_t *src, dma_addr_t *dst)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > +
> > + if (src != NULL)
> > + *src = AUDIO_READ(nuc900_audio->mmio + ACTL_PDSTC);
> > +
> > + if (dst != NULL)
> > + *dst = AUDIO_READ(nuc900_audio->mmio + ACTL_RDSTC);
> > +
> > + return 0;
> > +}
> > +
> > +static snd_pcm_uframes_t nuc900_dma_pointer(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + dma_addr_t src, dst;
> > + unsigned long res;
> > +
> > + nuc900_dma_getposition(substream, &src, &dst);
> > +
> > + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
> > + res = dst - runtime->dma_addr;
> > + else
> > + res = src - runtime->dma_addr;
> > +
> > + return bytes_to_frames(substream->runtime, res);
> > +}
> > +
> > +static int nuc900_dma_open(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio;
> > +
> > + snd_soc_set_runtime_hwparams(substream, &nuc900_pcm_hardware);
> > +
> > + nuc900_audio = nuc900_ac97_data;
> > +
> > + if (request_irq(nuc900_audio->irq_num, nuc900_dma_interrupt,
> > + IRQF_DISABLED, "nuc900-dma", substream))
> > + return -EBUSY;
> > +
> > + runtime->private_data = nuc900_audio;
> > +
> > + return 0;
> > +}
> > +
> > +static int nuc900_dma_close(struct snd_pcm_substream *substream)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > + struct nuc900_audio *nuc900_audio = runtime->private_data;
> > +
> > + free_irq(nuc900_audio->irq_num, substream);
> > +
> > + return 0;
> > +}
> > +
> > +static int nuc900_dma_mmap(struct snd_pcm_substream *substream,
> > + struct vm_area_struct *vma)
> > +{
> > + struct snd_pcm_runtime *runtime = substream->runtime;
> > +
> > + return dma_mmap_writecombine(substream->pcm->card->dev, vma,
> > + runtime->dma_area,
> > + runtime->dma_addr,
> > + runtime->dma_bytes);
> > +}
> > +
> > +static struct snd_pcm_ops nuc900_dma_ops = {
> > + .open = nuc900_dma_open,
> > + .close = nuc900_dma_close,
> > + .ioctl = snd_pcm_lib_ioctl,
> > + .hw_params = nuc900_dma_hw_params,
> > + .hw_free = nuc900_dma_hw_free,
> > + .prepare = nuc900_dma_prepare,
> > + .trigger = nuc900_dma_trigger,
> > + .pointer = nuc900_dma_pointer,
> > + .mmap = nuc900_dma_mmap,
> > +};
> > +
> > +static void nuc900_dma_free_dma_buffers(struct snd_pcm *pcm)
> > +{
> > + snd_pcm_lib_preallocate_free_for_all(pcm);
> > +}
> > +
> > +static u64 nuc900_pcm_dmamask = DMA_BIT_MASK(32);
> > +static int nuc900_dma_new(struct snd_card *card,
> > + struct snd_soc_dai *dai, struct snd_pcm *pcm)
> > +{
> > + if (!card->dev->dma_mask)
> > + card->dev->dma_mask = &nuc900_pcm_dmamask;
> > + if (!card->dev->coherent_dma_mask)
> > + card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> > +
> > + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
> > + card->dev, 4 * 1024, (4 * 1024) - 1);
> > +
> > + return 0;
> > +}
> > +
> > +struct snd_soc_platform nuc900_soc_platform = {
> > + .name = "nuc900-dma",
> > + .pcm_ops = &nuc900_dma_ops,
> > + .pcm_new = nuc900_dma_new,
> > + .pcm_free = nuc900_dma_free_dma_buffers,
> > +}
> > +EXPORT_SYMBOL_GPL(nuc900_soc_platform);
> > +
> > +static int __init nuc900_soc_platform_init(void)
> > +{
> > + return snd_soc_register_platform(&nuc900_soc_platform);
> > +}
> > +
> > +static void __exit nuc900_soc_platform_exit(void)
> > +{
> > + snd_soc_unregister_platform(&nuc900_soc_platform);
> > +}
> > +
> > +module_init(nuc900_soc_platform_init);
> > +module_exit(nuc900_soc_platform_exit);
> > +
> > +MODULE_AUTHOR("Wan ZongShun, <mcuos.com at gmail.com>");
> > +MODULE_DESCRIPTION("nuc900 Audio DMA module");
> > +MODULE_LICENSE("GPL");
> > --
> > 1.6.3.3
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