ASoC: NUC900/audio: add nuc900 audio driver support
Add support for NUC900 AC97 Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Wan ZongShun
Mark Brown
Родитель
b6f4bb383d
Коммит
1082e2703a
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@ -30,6 +30,7 @@ source "sound/soc/blackfin/Kconfig"
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source "sound/soc/davinci/Kconfig"
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source "sound/soc/fsl/Kconfig"
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source "sound/soc/imx/Kconfig"
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source "sound/soc/nuc900/Kconfig"
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source "sound/soc/omap/Kconfig"
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source "sound/soc/pxa/Kconfig"
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source "sound/soc/s3c24xx/Kconfig"
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@ -8,6 +8,7 @@ obj-$(CONFIG_SND_SOC) += blackfin/
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obj-$(CONFIG_SND_SOC) += davinci/
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obj-$(CONFIG_SND_SOC) += fsl/
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obj-$(CONFIG_SND_SOC) += imx/
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obj-$(CONFIG_SND_SOC) += nuc900/
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obj-$(CONFIG_SND_SOC) += omap/
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obj-$(CONFIG_SND_SOC) += pxa/
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obj-$(CONFIG_SND_SOC) += s3c24xx/
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@ -0,0 +1,27 @@
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##
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## NUC900 series AC97 API
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##
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config SND_SOC_NUC900
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tristate "SoC Audio for NUC900 series"
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depends on ARCH_W90X900
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help
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This option enables support for AC97 mode on the NUC900 SoC.
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config SND_SOC_NUC900_AC97
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tristate
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select AC97_BUS
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select SND_AC97_CODEC
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select SND_SOC_AC97_BUS
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##
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## Boards
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##
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config SND_SOC_NUC900EVB
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tristate "NUC900 AC97 support for demo board"
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depends on SND_SOC_NUC900
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select SND_SOC_NUC900_AC97
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select SND_SOC_AC97_CODEC
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help
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Select this option to enable audio (AC97) on the
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NUC900 demoboard.
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@ -0,0 +1,11 @@
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# NUC900 series audio
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snd-soc-nuc900-pcm-objs := nuc900-pcm.o
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snd-soc-nuc900-ac97-objs := nuc900-ac97.o
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obj-$(CONFIG_SND_SOC_NUC900) += snd-soc-nuc900-pcm.o
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obj-$(CONFIG_SND_SOC_NUC900_AC97) += snd-soc-nuc900-ac97.o
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# Boards
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snd-soc-nuc900-audio-objs := nuc900-audio.o
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obj-$(CONFIG_SND_SOC_NUC900EVB) += snd-soc-nuc900-audio.o
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@ -0,0 +1,442 @@
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/*
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* Copyright (c) 2009-2010 Nuvoton technology corporation.
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation;version 2 of the License.
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*
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/suspend.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <linux/device.h>
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#include <linux/clk.h>
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#include <mach/mfp.h>
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#include "nuc900-auido.h"
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static DEFINE_MUTEX(ac97_mutex);
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struct nuc900_audio *nuc900_ac97_data;
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static int nuc900_checkready(void)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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if (!(AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS0) & CODEC_READY))
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return -EPERM;
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return 0;
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}
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/* AC97 controller reads codec register */
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static unsigned short nuc900_ac97_read(struct snd_ac97 *ac97,
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unsigned short reg)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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unsigned long timeout = 0x10000, val;
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mutex_lock(&ac97_mutex);
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val = nuc900_checkready();
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if (!!val) {
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dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
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goto out;
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}
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/* set the R_WB bit and write register index */
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, R_WB | reg);
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/* set the valid frame bit and valid slots */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
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val |= (VALID_FRAME | SLOT1_VALID);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
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udelay(100);
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/* polling the AC_R_FINISH */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
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val &= AC_R_FINISH;
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while (!val && timeout--)
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mdelay(1);
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if (!timeout) {
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dev_err(nuc900_audio->dev, "AC97 read register time out !\n");
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val = -EPERM;
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goto out;
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}
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0) ;
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val &= ~SLOT1_VALID;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, val);
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if (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS1) >> 2 != reg) {
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dev_err(nuc900_audio->dev,
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"R_INDEX of REG_ACTL_ACIS1 not match!\n");
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}
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udelay(100);
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val = (AUDIO_READ(nuc900_audio->mmio + ACTL_ACIS2) & 0xFFFF);
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out:
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mutex_unlock(&ac97_mutex);
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return val;
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}
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/* AC97 controller writes to codec register */
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static void nuc900_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
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unsigned short val)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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unsigned long tmp, timeout = 0x10000;
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mutex_lock(&ac97_mutex);
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tmp = nuc900_checkready();
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if (!!tmp)
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dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
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/* clear the R_WB bit and write register index */
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS1, reg);
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/* write register value */
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS2, val);
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/* set the valid frame bit and valid slots */
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
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tmp |= SLOT1_VALID | SLOT2_VALID | VALID_FRAME;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
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udelay(100);
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/* polling the AC_W_FINISH */
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
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tmp &= AC_W_FINISH;
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while (tmp && timeout--)
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mdelay(1);
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if (!timeout)
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dev_err(nuc900_audio->dev, "AC97 write register time out !\n");
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
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tmp &= ~(SLOT1_VALID | SLOT2_VALID);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
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mutex_unlock(&ac97_mutex);
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}
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static void nuc900_ac97_warm_reset(struct snd_ac97 *ac97)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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unsigned long val;
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mutex_lock(&ac97_mutex);
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/* warm reset AC 97 */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
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val |= AC_W_RES;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
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udelay(1000);
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val = nuc900_checkready();
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if (!!val)
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dev_err(nuc900_audio->dev, "AC97 codec is not ready\n");
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mutex_unlock(&ac97_mutex);
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}
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static void nuc900_ac97_cold_reset(struct snd_ac97 *ac97)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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unsigned long val;
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mutex_lock(&ac97_mutex);
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/* reset Audio Controller */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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val |= ACTL_RESET_BIT;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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udelay(1000);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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val &= (~ACTL_RESET_BIT);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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udelay(1000);
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/* reset AC-link interface */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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val |= AC_RESET;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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udelay(1000);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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val &= ~AC_RESET;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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udelay(1000);
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/* cold reset AC 97 */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
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val |= AC_C_RES;
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
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udelay(1000);
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_ACCON);
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val &= (~AC_C_RES);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACCON, val);
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udelay(1000);
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mutex_unlock(&ac97_mutex);
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}
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/* AC97 controller operations */
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struct snd_ac97_bus_ops soc_ac97_ops = {
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.read = nuc900_ac97_read,
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.write = nuc900_ac97_write,
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.reset = nuc900_ac97_cold_reset,
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.warm_reset = nuc900_ac97_warm_reset,
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}
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EXPORT_SYMBOL_GPL(soc_ac97_ops);
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static int nuc900_ac97_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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int ret, stype = SUBSTREAM_TYPE(substream);
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unsigned long val, tmp;
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ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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if (PCM_TX == stype) {
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
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tmp |= (SLOT3_VALID | SLOT4_VALID | VALID_FRAME);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_PSR);
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tmp |= (P_DMA_END_IRQ | P_DMA_MIDDLE_IRQ);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, tmp);
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val |= AC_PLAY;
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} else {
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_RSR);
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tmp |= (R_DMA_END_IRQ | R_DMA_MIDDLE_IRQ);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, tmp);
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val |= AC_RECORD;
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}
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_RESET);
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if (PCM_TX == stype) {
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tmp = AUDIO_READ(nuc900_audio->mmio + ACTL_ACOS0);
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tmp &= ~(SLOT3_VALID | SLOT4_VALID);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_ACOS0, tmp);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_PSR, RESET_PRSR);
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val &= ~AC_PLAY;
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} else {
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RSR, RESET_PRSR);
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val &= ~AC_RECORD;
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}
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_RESET, val);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static int nuc900_ac97_probe(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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unsigned long val;
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mutex_lock(&ac97_mutex);
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/* enable unit clock */
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clk_enable(nuc900_audio->clk);
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/* enable audio controller and AC-link interface */
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val = AUDIO_READ(nuc900_audio->mmio + ACTL_CON);
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val |= (IIS_AC_PIN_SEL | ACLINK_EN);
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AUDIO_WRITE(nuc900_audio->mmio + ACTL_CON, val);
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mutex_unlock(&ac97_mutex);
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return 0;
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}
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static void nuc900_ac97_remove(struct platform_device *pdev,
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struct snd_soc_dai *dai)
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{
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struct nuc900_audio *nuc900_audio = nuc900_ac97_data;
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clk_disable(nuc900_audio->clk);
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}
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static struct snd_soc_dai_ops nuc900_ac97_dai_ops = {
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.trigger = nuc900_ac97_trigger,
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};
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struct snd_soc_dai nuc900_ac97_dai = {
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.name = "nuc900-ac97",
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.probe = nuc900_ac97_probe,
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.remove = nuc900_ac97_remove,
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.ac97_control = 1,
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.playback = {
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.channels_min = 1,
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.channels_max = 2,
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},
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.capture = {
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.channels_min = 1,
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.channels_max = 2,
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},
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.ops = &nuc900_ac97_dai_ops,
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}
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EXPORT_SYMBOL_GPL(nuc900_ac97_dai);
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static int __devinit nuc900_ac97_drvprobe(struct platform_device *pdev)
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{
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struct nuc900_audio *nuc900_audio;
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int ret;
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if (nuc900_ac97_data)
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return -EBUSY;
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nuc900_audio = kzalloc(sizeof(struct nuc900_audio), GFP_KERNEL);
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if (!nuc900_audio)
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return -ENOMEM;
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spin_lock_init(&nuc900_audio->lock);
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nuc900_audio->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!nuc900_audio->res) {
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ret = -ENODEV;
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goto out0;
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}
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if (!request_mem_region(nuc900_audio->res->start,
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resource_size(nuc900_audio->res), pdev->name)) {
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ret = -EBUSY;
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goto out0;
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}
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nuc900_audio->mmio = ioremap(nuc900_audio->res->start,
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resource_size(nuc900_audio->res));
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if (!nuc900_audio->mmio) {
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ret = -ENOMEM;
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goto out1;
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}
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nuc900_audio->clk = clk_get(&pdev->dev, NULL);
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if (IS_ERR(nuc900_audio->clk)) {
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ret = PTR_ERR(nuc900_audio->clk);
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goto out2;
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}
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nuc900_audio->irq_num = platform_get_irq(pdev, 0);
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if (!nuc900_audio->irq_num) {
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ret = -EBUSY;
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goto out2;
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}
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nuc900_ac97_data = nuc900_audio;
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nuc900_audio->dev = nuc900_ac97_dai.dev = &pdev->dev;
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ret = snd_soc_register_dai(&nuc900_ac97_dai);
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if (ret)
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goto out3;
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mfp_set_groupg(nuc900_audio->dev); /* enbale ac97 multifunction pin*/
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||||
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return 0;
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||||
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||||
out3:
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clk_put(nuc900_audio->clk);
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out2:
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iounmap(nuc900_audio->mmio);
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out1:
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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@gmail.com>");
|
||||
MODULE_DESCRIPTION("NUC900 AC97 SoC driver!");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:nuc900-ac97");
|
||||
|
|
@ -0,0 +1,81 @@
|
|||
/*
|
||||
* Copyright (c) 2010 Nuvoton technology corporation.
|
||||
*
|
||||
* Wan ZongShun <mcuos.com@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");
|
||||
|
|
@ -0,0 +1,121 @@
|
|||
/*
|
||||
* Copyright (c) 2010 Nuvoton technology corporation.
|
||||
*
|
||||
* Wan ZongShun <mcuos.com@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)
|
||||
|
||||
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 */
|
||||
|
|
@ -0,0 +1,352 @@
|
|||
/*
|
||||
* Copyright (c) 2010 Nuvoton technology corporation.
|
||||
*
|
||||
* Wan ZongShun <mcuos.com@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@gmail.com>");
|
||||
MODULE_DESCRIPTION("nuc900 Audio DMA module");
|
||||
MODULE_LICENSE("GPL");
|
||||
Загрузка…
Ссылка в новой задаче