ALSA: ASoC: Au12x0/Au1550 PSC Audio support
Audio for Au12x0/Au1550 PSCs in AC97 and I2S mode, for ASoC v1 framework. - DBDMA, AC97 and I2S drivers - sample AC97 machine code (Db1200) Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>hifive-unleashed-5.1
Manuel Lauss
Jaroslav Kysela
parent
bf41534506
commit
4a161d235b
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@ -204,6 +204,14 @@ typedef struct psc_i2s {
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u32 psc_i2sudf;
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} psc_i2s_t;
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#define PSC_I2SCFG_OFFSET 0x08
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#define PSC_I2SMASK_OFFSET 0x0C
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#define PSC_I2SPCR_OFFSET 0x10
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#define PSC_I2SSTAT_OFFSET 0x14
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#define PSC_I2SEVENT_OFFSET 0x18
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#define PSC_I2SRXTX_OFFSET 0x1C
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#define PSC_I2SUDF_OFFSET 0x20
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/* I2S Config Register. */
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#define PSC_I2SCFG_RT_MASK (3 << 30)
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#define PSC_I2SCFG_RT_FIFO1 (0 << 30)
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@ -24,6 +24,7 @@ config SND_SOC_AC97_BUS
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# All the supported Soc's
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source "sound/soc/at32/Kconfig"
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source "sound/soc/at91/Kconfig"
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source "sound/soc/au1x/Kconfig"
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source "sound/soc/pxa/Kconfig"
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source "sound/soc/s3c24xx/Kconfig"
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source "sound/soc/sh/Kconfig"
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@ -2,4 +2,4 @@ snd-soc-core-objs := soc-core.o soc-dapm.o
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obj-$(CONFIG_SND_SOC) += snd-soc-core.o
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obj-$(CONFIG_SND_SOC) += codecs/ at32/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/
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obj-$(CONFIG_SND_SOC) += omap/
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obj-$(CONFIG_SND_SOC) += omap/ au1x/
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@ -0,0 +1,32 @@
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##
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## Au1200/Au1550 PSC + DBDMA
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##
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config SND_SOC_AU1XPSC
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tristate "SoC Audio for Au1200/Au1250/Au1550"
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depends on SOC_AU1200 || SOC_AU1550
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help
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This option enables support for the Programmable Serial
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Controllers in AC97 and I2S mode, and the Descriptor-Based DMA
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Controller (DBDMA) as found on the Au1200/Au1250/Au1550 SoC.
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config SND_SOC_AU1XPSC_I2S
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tristate
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config SND_SOC_AU1XPSC_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_SAMPLE_PSC_AC97
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tristate "Sample Au12x0/Au1550 PSC AC97 sound machine"
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depends on SND_SOC_AU1XPSC
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select SND_SOC_AU1XPSC_AC97
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select SND_SOC_AC97_CODEC
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help
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This is a sample AC97 sound machine for use in Au12x0/Au1550
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based systems which have audio on PSC1 (e.g. Db1200 demoboard).
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@ -0,0 +1,13 @@
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# Au1200/Au1550 PSC audio
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snd-soc-au1xpsc-dbdma-objs := dbdma2.o
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snd-soc-au1xpsc-i2s-objs := psc-i2s.o
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snd-soc-au1xpsc-ac97-objs := psc-ac97.o
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obj-$(CONFIG_SND_SOC_AU1XPSC) += snd-soc-au1xpsc-dbdma.o
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obj-$(CONFIG_SND_SOC_AU1XPSC_I2S) += snd-soc-au1xpsc-i2s.o
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obj-$(CONFIG_SND_SOC_AU1XPSC_AC97) += snd-soc-au1xpsc-ac97.o
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# Boards
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snd-soc-sample-ac97-objs := sample-ac97.o
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obj-$(CONFIG_SND_SOC_SAMPLE_PSC_AC97) += snd-soc-sample-ac97.o
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@ -0,0 +1,421 @@
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/*
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* Au12x0/Au1550 PSC ALSA ASoC audio support.
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*
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* (c) 2007-2008 MSC Vertriebsges.m.b.H.,
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* Manuel Lauss <mano@roarinelk.homelinux.net>
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* DMA glue for Au1x-PSC audio.
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*
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* NOTE: all of these drivers can only work with a SINGLE instance
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* of a PSC. Multiple independent audio devices are impossible
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* with ASoC v1.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/au1xxx_dbdma.h>
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#include <asm/mach-au1x00/au1xxx_psc.h>
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#include "psc.h"
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/*#define PCM_DEBUG*/
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#define MSG(x...) printk(KERN_INFO "au1xpsc_pcm: " x)
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#ifdef PCM_DEBUG
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#define DBG MSG
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#else
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#define DBG(x...) do {} while (0)
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#endif
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struct au1xpsc_audio_dmadata {
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/* DDMA control data */
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unsigned int ddma_id; /* DDMA direction ID for this PSC */
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u32 ddma_chan; /* DDMA context */
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/* PCM context (for irq handlers) */
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struct snd_pcm_substream *substream;
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unsigned long curr_period; /* current segment DDMA is working on */
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unsigned long q_period; /* queue period(s) */
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unsigned long dma_area; /* address of queued DMA area */
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unsigned long dma_area_s; /* start address of DMA area */
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unsigned long pos; /* current byte position being played */
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unsigned long periods; /* number of SG segments in total */
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unsigned long period_bytes; /* size in bytes of one SG segment */
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/* runtime data */
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int msbits;
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};
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/* instance data. There can be only one, MacLeod!!!! */
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static struct au1xpsc_audio_dmadata *au1xpsc_audio_pcmdma[2];
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/*
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* These settings are somewhat okay, at least on my machine audio plays
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* almost skip-free. Especially the 64kB buffer seems to help a LOT.
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*/
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#define AU1XPSC_PERIOD_MIN_BYTES 1024
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#define AU1XPSC_BUFFER_MIN_BYTES 65536
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#define AU1XPSC_PCM_FMTS \
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(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \
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SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
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SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE | \
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SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE | \
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SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE | \
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0)
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/* PCM hardware DMA capabilities - platform specific */
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static const struct snd_pcm_hardware au1xpsc_pcm_hardware = {
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.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_INTERLEAVED,
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.formats = AU1XPSC_PCM_FMTS,
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.period_bytes_min = AU1XPSC_PERIOD_MIN_BYTES,
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.period_bytes_max = 4096 * 1024 - 1,
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.periods_min = 2,
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.periods_max = 4096, /* 2 to as-much-as-you-like */
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.buffer_bytes_max = 4096 * 1024 - 1,
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.fifo_size = 16, /* fifo entries of AC97/I2S PSC */
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};
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static void au1x_pcm_queue_tx(struct au1xpsc_audio_dmadata *cd)
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{
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au1xxx_dbdma_put_source_flags(cd->ddma_chan,
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(void *)phys_to_virt(cd->dma_area),
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cd->period_bytes, DDMA_FLAGS_IE);
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/* update next-to-queue period */
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++cd->q_period;
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cd->dma_area += cd->period_bytes;
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if (cd->q_period >= cd->periods) {
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cd->q_period = 0;
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cd->dma_area = cd->dma_area_s;
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}
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}
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static void au1x_pcm_queue_rx(struct au1xpsc_audio_dmadata *cd)
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{
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au1xxx_dbdma_put_dest_flags(cd->ddma_chan,
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(void *)phys_to_virt(cd->dma_area),
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cd->period_bytes, DDMA_FLAGS_IE);
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/* update next-to-queue period */
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++cd->q_period;
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cd->dma_area += cd->period_bytes;
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if (cd->q_period >= cd->periods) {
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cd->q_period = 0;
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cd->dma_area = cd->dma_area_s;
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}
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}
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static void au1x_pcm_dmatx_cb(int irq, void *dev_id)
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{
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struct au1xpsc_audio_dmadata *cd = dev_id;
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cd->pos += cd->period_bytes;
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if (++cd->curr_period >= cd->periods) {
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cd->pos = 0;
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cd->curr_period = 0;
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}
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snd_pcm_period_elapsed(cd->substream);
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au1x_pcm_queue_tx(cd);
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}
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static void au1x_pcm_dmarx_cb(int irq, void *dev_id)
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{
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struct au1xpsc_audio_dmadata *cd = dev_id;
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cd->pos += cd->period_bytes;
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if (++cd->curr_period >= cd->periods) {
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cd->pos = 0;
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cd->curr_period = 0;
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}
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snd_pcm_period_elapsed(cd->substream);
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au1x_pcm_queue_rx(cd);
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}
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static void au1x_pcm_dbdma_free(struct au1xpsc_audio_dmadata *pcd)
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{
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if (pcd->ddma_chan) {
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au1xxx_dbdma_stop(pcd->ddma_chan);
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au1xxx_dbdma_reset(pcd->ddma_chan);
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au1xxx_dbdma_chan_free(pcd->ddma_chan);
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pcd->ddma_chan = 0;
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pcd->msbits = 0;
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}
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}
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/* in case of missing DMA ring or changed TX-source / RX-dest bit widths,
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* allocate (or reallocate) a 2-descriptor DMA ring with bit depth according
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* to ALSA-supplied sample depth. This is due to limitations in the dbdma api
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* (cannot adjust source/dest widths of already allocated descriptor ring).
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*/
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static int au1x_pcm_dbdma_realloc(struct au1xpsc_audio_dmadata *pcd,
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int stype, int msbits)
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{
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/* DMA only in 8/16/32 bit widths */
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if (msbits == 24)
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msbits = 32;
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/* check current config: correct bits and descriptors allocated? */
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if ((pcd->ddma_chan) && (msbits == pcd->msbits))
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goto out; /* all ok! */
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au1x_pcm_dbdma_free(pcd);
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if (stype == PCM_RX)
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pcd->ddma_chan = au1xxx_dbdma_chan_alloc(pcd->ddma_id,
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DSCR_CMD0_ALWAYS,
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au1x_pcm_dmarx_cb, (void *)pcd);
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else
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pcd->ddma_chan = au1xxx_dbdma_chan_alloc(DSCR_CMD0_ALWAYS,
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pcd->ddma_id,
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au1x_pcm_dmatx_cb, (void *)pcd);
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if (!pcd->ddma_chan)
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return -ENOMEM;;
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au1xxx_dbdma_set_devwidth(pcd->ddma_chan, msbits);
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au1xxx_dbdma_ring_alloc(pcd->ddma_chan, 2);
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pcd->msbits = msbits;
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au1xxx_dbdma_stop(pcd->ddma_chan);
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au1xxx_dbdma_reset(pcd->ddma_chan);
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out:
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return 0;
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}
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static int au1xpsc_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct au1xpsc_audio_dmadata *pcd;
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int stype, ret;
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ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
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if (ret < 0)
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goto out;
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stype = SUBSTREAM_TYPE(substream);
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pcd = au1xpsc_audio_pcmdma[stype];
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DBG("runtime->dma_area = 0x%08lx dma_addr_t = 0x%08lx dma_size = %d "
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"runtime->min_align %d\n",
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(unsigned long)runtime->dma_area,
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(unsigned long)runtime->dma_addr, runtime->dma_bytes,
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runtime->min_align);
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DBG("bits %d frags %d frag_bytes %d is_rx %d\n", params->msbits,
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params_periods(params), params_period_bytes(params), stype);
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ret = au1x_pcm_dbdma_realloc(pcd, stype, params->msbits);
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if (ret) {
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MSG("DDMA channel (re)alloc failed!\n");
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goto out;
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}
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pcd->substream = substream;
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pcd->period_bytes = params_period_bytes(params);
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pcd->periods = params_periods(params);
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pcd->dma_area_s = pcd->dma_area = (unsigned long)runtime->dma_addr;
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pcd->q_period = 0;
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pcd->curr_period = 0;
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pcd->pos = 0;
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ret = 0;
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out:
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return ret;
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}
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static int au1xpsc_pcm_hw_free(struct snd_pcm_substream *substream)
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{
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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static int au1xpsc_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct au1xpsc_audio_dmadata *pcd =
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au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)];
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au1xxx_dbdma_reset(pcd->ddma_chan);
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if (SUBSTREAM_TYPE(substream) == PCM_RX) {
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au1x_pcm_queue_rx(pcd);
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au1x_pcm_queue_rx(pcd);
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} else {
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au1x_pcm_queue_tx(pcd);
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au1x_pcm_queue_tx(pcd);
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}
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return 0;
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}
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static int au1xpsc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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u32 c = au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]->ddma_chan;
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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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au1xxx_dbdma_start(c);
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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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au1xxx_dbdma_stop(c);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static snd_pcm_uframes_t
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au1xpsc_pcm_pointer(struct snd_pcm_substream *substream)
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{
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return bytes_to_frames(substream->runtime,
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au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]->pos);
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}
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static int au1xpsc_pcm_open(struct snd_pcm_substream *substream)
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{
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snd_soc_set_runtime_hwparams(substream, &au1xpsc_pcm_hardware);
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return 0;
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}
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static int au1xpsc_pcm_close(struct snd_pcm_substream *substream)
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{
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au1x_pcm_dbdma_free(au1xpsc_audio_pcmdma[SUBSTREAM_TYPE(substream)]);
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return 0;
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}
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struct snd_pcm_ops au1xpsc_pcm_ops = {
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.open = au1xpsc_pcm_open,
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.close = au1xpsc_pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = au1xpsc_pcm_hw_params,
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.hw_free = au1xpsc_pcm_hw_free,
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.prepare = au1xpsc_pcm_prepare,
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.trigger = au1xpsc_pcm_trigger,
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.pointer = au1xpsc_pcm_pointer,
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};
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static void au1xpsc_pcm_free_dma_buffers(struct snd_pcm *pcm)
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{
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snd_pcm_lib_preallocate_free_for_all(pcm);
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}
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static int au1xpsc_pcm_new(struct snd_card *card,
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struct snd_soc_dai *dai,
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struct snd_pcm *pcm)
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{
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snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
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card->dev, AU1XPSC_BUFFER_MIN_BYTES, (4096 * 1024) - 1);
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return 0;
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}
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static int au1xpsc_pcm_probe(struct platform_device *pdev)
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{
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struct resource *r;
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int ret;
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if (au1xpsc_audio_pcmdma[PCM_TX] || au1xpsc_audio_pcmdma[PCM_RX])
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return -EBUSY;
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/* TX DMA */
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au1xpsc_audio_pcmdma[PCM_TX]
|
||||
= kzalloc(sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
|
||||
if (!au1xpsc_audio_pcmdma[PCM_TX])
|
||||
return -ENOMEM;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
||||
if (!r) {
|
||||
ret = -ENODEV;
|
||||
goto out1;
|
||||
}
|
||||
(au1xpsc_audio_pcmdma[PCM_TX])->ddma_id = r->start;
|
||||
|
||||
/* RX DMA */
|
||||
au1xpsc_audio_pcmdma[PCM_RX]
|
||||
= kzalloc(sizeof(struct au1xpsc_audio_dmadata), GFP_KERNEL);
|
||||
if (!au1xpsc_audio_pcmdma[PCM_RX])
|
||||
return -ENOMEM;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
|
||||
if (!r) {
|
||||
ret = -ENODEV;
|
||||
goto out2;
|
||||
}
|
||||
(au1xpsc_audio_pcmdma[PCM_RX])->ddma_id = r->start;
|
||||
|
||||
return 0;
|
||||
|
||||
out2:
|
||||
kfree(au1xpsc_audio_pcmdma[PCM_RX]);
|
||||
au1xpsc_audio_pcmdma[PCM_RX] = NULL;
|
||||
out1:
|
||||
kfree(au1xpsc_audio_pcmdma[PCM_TX]);
|
||||
au1xpsc_audio_pcmdma[PCM_TX] = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xpsc_pcm_remove(struct platform_device *pdev)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 2; i++) {
|
||||
if (au1xpsc_audio_pcmdma[i]) {
|
||||
au1x_pcm_dbdma_free(au1xpsc_audio_pcmdma[i]);
|
||||
kfree(au1xpsc_audio_pcmdma[i]);
|
||||
au1xpsc_audio_pcmdma[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* au1xpsc audio platform */
|
||||
struct snd_soc_platform au1xpsc_soc_platform = {
|
||||
.name = "au1xpsc-pcm-dbdma",
|
||||
.probe = au1xpsc_pcm_probe,
|
||||
.remove = au1xpsc_pcm_remove,
|
||||
.pcm_ops = &au1xpsc_pcm_ops,
|
||||
.pcm_new = au1xpsc_pcm_new,
|
||||
.pcm_free = au1xpsc_pcm_free_dma_buffers,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(au1xpsc_soc_platform);
|
||||
|
||||
static int __init au1xpsc_audio_dbdma_init(void)
|
||||
{
|
||||
au1xpsc_audio_pcmdma[PCM_TX] = NULL;
|
||||
au1xpsc_audio_pcmdma[PCM_RX] = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit au1xpsc_audio_dbdma_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
module_init(au1xpsc_audio_dbdma_init);
|
||||
module_exit(au1xpsc_audio_dbdma_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au12x0/Au1550 PSC Audio DMA driver");
|
||||
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
|
||||
|
|
@ -0,0 +1,387 @@
|
|||
/*
|
||||
* Au12x0/Au1550 PSC ALSA ASoC audio support.
|
||||
*
|
||||
* (c) 2007-2008 MSC Vertriebsges.m.b.H.,
|
||||
* Manuel Lauss <mano@roarinelk.homelinux.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* Au1xxx-PSC AC97 glue.
|
||||
*
|
||||
* NOTE: all of these drivers can only work with a SINGLE instance
|
||||
* of a PSC. Multiple independent audio devices are impossible
|
||||
* with ASoC v1.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/soc.h>
|
||||
#include <asm/mach-au1x00/au1000.h>
|
||||
#include <asm/mach-au1x00/au1xxx_psc.h>
|
||||
|
||||
#include "psc.h"
|
||||
|
||||
#define AC97_DIR \
|
||||
(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
|
||||
|
||||
#define AC97_RATES \
|
||||
SNDRV_PCM_RATE_8000_48000
|
||||
|
||||
#define AC97_FMTS \
|
||||
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3BE)
|
||||
|
||||
#define AC97PCR_START(stype) \
|
||||
((stype) == PCM_TX ? PSC_AC97PCR_TS : PSC_AC97PCR_RS)
|
||||
#define AC97PCR_STOP(stype) \
|
||||
((stype) == PCM_TX ? PSC_AC97PCR_TP : PSC_AC97PCR_RP)
|
||||
#define AC97PCR_CLRFIFO(stype) \
|
||||
((stype) == PCM_TX ? PSC_AC97PCR_TC : PSC_AC97PCR_RC)
|
||||
|
||||
/* instance data. There can be only one, MacLeod!!!! */
|
||||
static struct au1xpsc_audio_data *au1xpsc_ac97_workdata;
|
||||
|
||||
/* AC97 controller reads codec register */
|
||||
static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
|
||||
unsigned short reg)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
unsigned short data, tmo;
|
||||
|
||||
au_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), AC97_CDC(pscdata));
|
||||
au_sync();
|
||||
|
||||
tmo = 1000;
|
||||
while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
|
||||
udelay(2);
|
||||
|
||||
if (!tmo)
|
||||
data = 0xffff;
|
||||
else
|
||||
data = au_readl(AC97_CDC(pscdata)) & 0xffff;
|
||||
|
||||
au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
|
||||
au_sync();
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
/* AC97 controller writes to codec register */
|
||||
static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
|
||||
unsigned short val)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
unsigned int tmo;
|
||||
|
||||
au_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), AC97_CDC(pscdata));
|
||||
au_sync();
|
||||
tmo = 1000;
|
||||
while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
|
||||
au_sync();
|
||||
|
||||
au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
|
||||
au_sync();
|
||||
}
|
||||
|
||||
/* AC97 controller asserts a warm reset */
|
||||
static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
|
||||
au_writel(PSC_AC97RST_SNC, AC97_RST(pscdata));
|
||||
au_sync();
|
||||
msleep(10);
|
||||
au_writel(0, AC97_RST(pscdata));
|
||||
au_sync();
|
||||
}
|
||||
|
||||
static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
int i;
|
||||
|
||||
/* disable PSC during cold reset */
|
||||
au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* issue cold reset */
|
||||
au_writel(PSC_AC97RST_RST, AC97_RST(pscdata));
|
||||
au_sync();
|
||||
msleep(500);
|
||||
au_writel(0, AC97_RST(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* enable PSC */
|
||||
au_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* wait for PSC to indicate it's ready */
|
||||
i = 100000;
|
||||
while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i))
|
||||
au_sync();
|
||||
|
||||
if (i == 0) {
|
||||
printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* enable the ac97 function */
|
||||
au_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* wait for AC97 core to become ready */
|
||||
i = 100000;
|
||||
while (!((au_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i))
|
||||
au_sync();
|
||||
if (i == 0)
|
||||
printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n");
|
||||
}
|
||||
|
||||
/* AC97 controller operations */
|
||||
struct snd_ac97_bus_ops soc_ac97_ops = {
|
||||
.read = au1xpsc_ac97_read,
|
||||
.write = au1xpsc_ac97_write,
|
||||
.reset = au1xpsc_ac97_cold_reset,
|
||||
.warm_reset = au1xpsc_ac97_warm_reset,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(soc_ac97_ops);
|
||||
|
||||
static int au1xpsc_ac97_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
unsigned long r, stat;
|
||||
int chans, stype = SUBSTREAM_TYPE(substream);
|
||||
|
||||
chans = params_channels(params);
|
||||
|
||||
r = au_readl(AC97_CFG(pscdata));
|
||||
stat = au_readl(AC97_STAT(pscdata));
|
||||
|
||||
/* already active? */
|
||||
if (stat & (PSC_AC97STAT_TB | PSC_AC97STAT_RB)) {
|
||||
/* reject parameters not currently set up */
|
||||
if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) ||
|
||||
(pscdata->rate != params_rate(params)))
|
||||
return -EINVAL;
|
||||
} else {
|
||||
/* disable AC97 device controller first */
|
||||
au_writel(r & ~PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* set sample bitdepth: REG[24:21]=(BITS-2)/2 */
|
||||
r &= ~PSC_AC97CFG_LEN_MASK;
|
||||
r |= PSC_AC97CFG_SET_LEN(params->msbits);
|
||||
|
||||
/* channels: enable slots for front L/R channel */
|
||||
if (stype == PCM_TX) {
|
||||
r &= ~PSC_AC97CFG_TXSLOT_MASK;
|
||||
r |= PSC_AC97CFG_TXSLOT_ENA(3);
|
||||
r |= PSC_AC97CFG_TXSLOT_ENA(4);
|
||||
} else {
|
||||
r &= ~PSC_AC97CFG_RXSLOT_MASK;
|
||||
r |= PSC_AC97CFG_RXSLOT_ENA(3);
|
||||
r |= PSC_AC97CFG_RXSLOT_ENA(4);
|
||||
}
|
||||
|
||||
/* finally enable the AC97 controller again */
|
||||
au_writel(r | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));
|
||||
au_sync();
|
||||
|
||||
pscdata->cfg = r;
|
||||
pscdata->rate = params_rate(params);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xpsc_ac97_trigger(struct snd_pcm_substream *substream,
|
||||
int cmd)
|
||||
{
|
||||
/* FIXME */
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
|
||||
int ret, stype = SUBSTREAM_TYPE(substream);
|
||||
|
||||
ret = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
au_writel(AC97PCR_START(stype), AC97_PCR(pscdata));
|
||||
au_sync();
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
au_writel(AC97PCR_STOP(stype), AC97_PCR(pscdata));
|
||||
au_sync();
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xpsc_ac97_probe(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
int ret;
|
||||
struct resource *r;
|
||||
unsigned long sel;
|
||||
|
||||
if (au1xpsc_ac97_workdata)
|
||||
return -EBUSY;
|
||||
|
||||
au1xpsc_ac97_workdata =
|
||||
kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
|
||||
if (!au1xpsc_ac97_workdata)
|
||||
return -ENOMEM;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!r) {
|
||||
ret = -ENODEV;
|
||||
goto out0;
|
||||
}
|
||||
|
||||
ret = -EBUSY;
|
||||
au1xpsc_ac97_workdata->ioarea =
|
||||
request_mem_region(r->start, r->end - r->start + 1,
|
||||
"au1xpsc_ac97");
|
||||
if (!au1xpsc_ac97_workdata->ioarea)
|
||||
goto out0;
|
||||
|
||||
au1xpsc_ac97_workdata->mmio = ioremap(r->start, 0xffff);
|
||||
if (!au1xpsc_ac97_workdata->mmio)
|
||||
goto out1;
|
||||
|
||||
/* configuration: max dma trigger threshold, enable ac97 */
|
||||
au1xpsc_ac97_workdata->cfg = PSC_AC97CFG_RT_FIFO8 |
|
||||
PSC_AC97CFG_TT_FIFO8 |
|
||||
PSC_AC97CFG_DE_ENABLE;
|
||||
|
||||
/* preserve PSC clock source set up by platform (dev.platform_data
|
||||
* is already occupied by soc layer)
|
||||
*/
|
||||
sel = au_readl(PSC_SEL(au1xpsc_ac97_workdata)) & PSC_SEL_CLK_MASK;
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
au_writel(0, PSC_SEL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_SEL_PS_AC97MODE | sel, PSC_SEL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
/* next up: cold reset. Dont check for PSC-ready now since
|
||||
* there may not be any codec clock yet.
|
||||
*/
|
||||
|
||||
return 0;
|
||||
|
||||
out1:
|
||||
release_resource(au1xpsc_ac97_workdata->ioarea);
|
||||
kfree(au1xpsc_ac97_workdata->ioarea);
|
||||
out0:
|
||||
kfree(au1xpsc_ac97_workdata);
|
||||
au1xpsc_ac97_workdata = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void au1xpsc_ac97_remove(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
/* disable PSC completely */
|
||||
au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
|
||||
iounmap(au1xpsc_ac97_workdata->mmio);
|
||||
release_resource(au1xpsc_ac97_workdata->ioarea);
|
||||
kfree(au1xpsc_ac97_workdata->ioarea);
|
||||
kfree(au1xpsc_ac97_workdata);
|
||||
au1xpsc_ac97_workdata = NULL;
|
||||
}
|
||||
|
||||
static int au1xpsc_ac97_suspend(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
/* save interesting registers and disable PSC */
|
||||
au1xpsc_ac97_workdata->pm[0] =
|
||||
au_readl(PSC_SEL(au1xpsc_ac97_workdata));
|
||||
|
||||
au_writel(0, AC97_CFG(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xpsc_ac97_resume(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
/* restore PSC clock config */
|
||||
au_writel(au1xpsc_ac97_workdata->pm[0] | PSC_SEL_PS_AC97MODE,
|
||||
PSC_SEL(au1xpsc_ac97_workdata));
|
||||
au_sync();
|
||||
|
||||
/* after this point the ac97 core will cold-reset the codec.
|
||||
* During cold-reset the PSC is reinitialized and the last
|
||||
* configuration set up in hw_params() is restored.
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_dai au1xpsc_ac97_dai = {
|
||||
.name = "au1xpsc_ac97",
|
||||
.type = SND_SOC_DAI_AC97,
|
||||
.probe = au1xpsc_ac97_probe,
|
||||
.remove = au1xpsc_ac97_remove,
|
||||
.suspend = au1xpsc_ac97_suspend,
|
||||
.resume = au1xpsc_ac97_resume,
|
||||
.playback = {
|
||||
.rates = AC97_RATES,
|
||||
.formats = AC97_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
},
|
||||
.capture = {
|
||||
.rates = AC97_RATES,
|
||||
.formats = AC97_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
},
|
||||
.ops = {
|
||||
.trigger = au1xpsc_ac97_trigger,
|
||||
.hw_params = au1xpsc_ac97_hw_params,
|
||||
},
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(au1xpsc_ac97_dai);
|
||||
|
||||
static int __init au1xpsc_ac97_init(void)
|
||||
{
|
||||
au1xpsc_ac97_workdata = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit au1xpsc_ac97_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
module_init(au1xpsc_ac97_init);
|
||||
module_exit(au1xpsc_ac97_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver");
|
||||
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
|
||||
|
|
@ -0,0 +1,414 @@
|
|||
/*
|
||||
* Au12x0/Au1550 PSC ALSA ASoC audio support.
|
||||
*
|
||||
* (c) 2007-2008 MSC Vertriebsges.m.b.H.,
|
||||
* Manuel Lauss <mano@roarinelk.homelinux.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* Au1xxx-PSC I2S glue.
|
||||
*
|
||||
* NOTE: all of these drivers can only work with a SINGLE instance
|
||||
* of a PSC. Multiple independent audio devices are impossible
|
||||
* with ASoC v1.
|
||||
* NOTE: so far only PSC slave mode (bit- and frameclock) is supported.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/soc.h>
|
||||
#include <asm/mach-au1x00/au1000.h>
|
||||
#include <asm/mach-au1x00/au1xxx_psc.h>
|
||||
|
||||
#include "psc.h"
|
||||
|
||||
/* supported I2S DAI hardware formats */
|
||||
#define AU1XPSC_I2S_DAIFMT \
|
||||
(SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_LEFT_J | \
|
||||
SND_SOC_DAIFMT_NB_NF)
|
||||
|
||||
/* supported I2S direction */
|
||||
#define AU1XPSC_I2S_DIR \
|
||||
(SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE)
|
||||
|
||||
#define AU1XPSC_I2S_RATES \
|
||||
SNDRV_PCM_RATE_8000_192000
|
||||
|
||||
#define AU1XPSC_I2S_FMTS \
|
||||
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
|
||||
|
||||
#define I2SSTAT_BUSY(stype) \
|
||||
((stype) == PCM_TX ? PSC_I2SSTAT_TB : PSC_I2SSTAT_RB)
|
||||
#define I2SPCR_START(stype) \
|
||||
((stype) == PCM_TX ? PSC_I2SPCR_TS : PSC_I2SPCR_RS)
|
||||
#define I2SPCR_STOP(stype) \
|
||||
((stype) == PCM_TX ? PSC_I2SPCR_TP : PSC_I2SPCR_RP)
|
||||
#define I2SPCR_CLRFIFO(stype) \
|
||||
((stype) == PCM_TX ? PSC_I2SPCR_TC : PSC_I2SPCR_RC)
|
||||
|
||||
|
||||
/* instance data. There can be only one, MacLeod!!!! */
|
||||
static struct au1xpsc_audio_data *au1xpsc_i2s_workdata;
|
||||
|
||||
static int au1xpsc_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
|
||||
unsigned int fmt)
|
||||
{
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
|
||||
unsigned long ct;
|
||||
int ret;
|
||||
|
||||
ret = -EINVAL;
|
||||
|
||||
ct = pscdata->cfg;
|
||||
|
||||
ct &= ~(PSC_I2SCFG_XM | PSC_I2SCFG_MLJ); /* left-justified */
|
||||
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
||||
case SND_SOC_DAIFMT_I2S:
|
||||
ct |= PSC_I2SCFG_XM; /* enable I2S mode */
|
||||
break;
|
||||
case SND_SOC_DAIFMT_MSB:
|
||||
break;
|
||||
case SND_SOC_DAIFMT_LSB:
|
||||
ct |= PSC_I2SCFG_MLJ; /* LSB (right-) justified */
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
ct &= ~(PSC_I2SCFG_BI | PSC_I2SCFG_WI); /* IB-IF */
|
||||
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
|
||||
case SND_SOC_DAIFMT_NB_NF:
|
||||
ct |= PSC_I2SCFG_BI | PSC_I2SCFG_WI;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_NB_IF:
|
||||
ct |= PSC_I2SCFG_BI;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_IB_NF:
|
||||
ct |= PSC_I2SCFG_WI;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_IB_IF:
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
||||
case SND_SOC_DAIFMT_CBM_CFM: /* CODEC master */
|
||||
ct |= PSC_I2SCFG_MS; /* PSC I2S slave mode */
|
||||
break;
|
||||
case SND_SOC_DAIFMT_CBS_CFS: /* CODEC slave */
|
||||
ct &= ~PSC_I2SCFG_MS; /* PSC I2S Master mode */
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
pscdata->cfg = ct;
|
||||
ret = 0;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
|
||||
|
||||
int cfgbits;
|
||||
unsigned long stat;
|
||||
|
||||
/* check if the PSC is already streaming data */
|
||||
stat = au_readl(I2S_STAT(pscdata));
|
||||
if (stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB)) {
|
||||
/* reject parameters not currently set up in hardware */
|
||||
cfgbits = au_readl(I2S_CFG(pscdata));
|
||||
if ((PSC_I2SCFG_GET_LEN(cfgbits) != params->msbits) ||
|
||||
(params_rate(params) != pscdata->rate))
|
||||
return -EINVAL;
|
||||
} else {
|
||||
/* set sample bitdepth */
|
||||
pscdata->cfg &= ~(0x1f << 4);
|
||||
pscdata->cfg |= PSC_I2SCFG_SET_LEN(params->msbits);
|
||||
/* remember current rate for other stream */
|
||||
pscdata->rate = params_rate(params);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Configure PSC late: on my devel systems the codec is I2S master and
|
||||
* supplies the i2sbitclock __AND__ i2sMclk (!) to the PSC unit. ASoC
|
||||
* uses aggressive PM and switches the codec off when it is not in use
|
||||
* which also means the PSC unit doesn't get any clocks and is therefore
|
||||
* dead. That's why this chunk here gets called from the trigger callback
|
||||
* because I can be reasonably certain the codec is driving the clocks.
|
||||
*/
|
||||
static int au1xpsc_i2s_configure(struct au1xpsc_audio_data *pscdata)
|
||||
{
|
||||
unsigned long tmo;
|
||||
|
||||
/* bring PSC out of sleep, and configure I2S unit */
|
||||
au_writel(PSC_CTRL_ENABLE, PSC_CTRL(pscdata));
|
||||
au_sync();
|
||||
|
||||
tmo = 1000000;
|
||||
while (!(au_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_SR) && tmo)
|
||||
tmo--;
|
||||
|
||||
if (!tmo)
|
||||
goto psc_err;
|
||||
|
||||
au_writel(0, I2S_CFG(pscdata));
|
||||
au_sync();
|
||||
au_writel(pscdata->cfg | PSC_I2SCFG_DE_ENABLE, I2S_CFG(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* wait for I2S controller to become ready */
|
||||
tmo = 1000000;
|
||||
while (!(au_readl(I2S_STAT(pscdata)) & PSC_I2SSTAT_DR) && tmo)
|
||||
tmo--;
|
||||
|
||||
if (tmo)
|
||||
return 0;
|
||||
|
||||
psc_err:
|
||||
au_writel(0, I2S_CFG(pscdata));
|
||||
au_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata));
|
||||
au_sync();
|
||||
return -ETIMEDOUT;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_start(struct au1xpsc_audio_data *pscdata, int stype)
|
||||
{
|
||||
unsigned long tmo, stat;
|
||||
int ret;
|
||||
|
||||
ret = 0;
|
||||
|
||||
/* if both TX and RX are idle, configure the PSC */
|
||||
stat = au_readl(I2S_STAT(pscdata));
|
||||
if (!(stat & (PSC_I2SSTAT_TB | PSC_I2SSTAT_RB))) {
|
||||
ret = au1xpsc_i2s_configure(pscdata);
|
||||
if (ret)
|
||||
goto out;
|
||||
}
|
||||
|
||||
au_writel(I2SPCR_CLRFIFO(stype), I2S_PCR(pscdata));
|
||||
au_sync();
|
||||
au_writel(I2SPCR_START(stype), I2S_PCR(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* wait for start confirmation */
|
||||
tmo = 1000000;
|
||||
while (!(au_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo)
|
||||
tmo--;
|
||||
|
||||
if (!tmo) {
|
||||
au_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata));
|
||||
au_sync();
|
||||
ret = -ETIMEDOUT;
|
||||
}
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_stop(struct au1xpsc_audio_data *pscdata, int stype)
|
||||
{
|
||||
unsigned long tmo, stat;
|
||||
|
||||
au_writel(I2SPCR_STOP(stype), I2S_PCR(pscdata));
|
||||
au_sync();
|
||||
|
||||
/* wait for stop confirmation */
|
||||
tmo = 1000000;
|
||||
while ((au_readl(I2S_STAT(pscdata)) & I2SSTAT_BUSY(stype)) && tmo)
|
||||
tmo--;
|
||||
|
||||
/* if both TX and RX are idle, disable PSC */
|
||||
stat = au_readl(I2S_STAT(pscdata));
|
||||
if (!(stat & (PSC_I2SSTAT_RB | PSC_I2SSTAT_RB))) {
|
||||
au_writel(0, I2S_CFG(pscdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_SUSPEND, PSC_CTRL(pscdata));
|
||||
au_sync();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct au1xpsc_audio_data *pscdata = au1xpsc_i2s_workdata;
|
||||
int ret, stype = SUBSTREAM_TYPE(substream);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
ret = au1xpsc_i2s_start(pscdata, stype);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
ret = au1xpsc_i2s_stop(pscdata, stype);
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_probe(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct resource *r;
|
||||
unsigned long sel;
|
||||
int ret;
|
||||
|
||||
if (au1xpsc_i2s_workdata)
|
||||
return -EBUSY;
|
||||
|
||||
au1xpsc_i2s_workdata =
|
||||
kzalloc(sizeof(struct au1xpsc_audio_data), GFP_KERNEL);
|
||||
if (!au1xpsc_i2s_workdata)
|
||||
return -ENOMEM;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!r) {
|
||||
ret = -ENODEV;
|
||||
goto out0;
|
||||
}
|
||||
|
||||
ret = -EBUSY;
|
||||
au1xpsc_i2s_workdata->ioarea =
|
||||
request_mem_region(r->start, r->end - r->start + 1,
|
||||
"au1xpsc_i2s");
|
||||
if (!au1xpsc_i2s_workdata->ioarea)
|
||||
goto out0;
|
||||
|
||||
au1xpsc_i2s_workdata->mmio = ioremap(r->start, 0xffff);
|
||||
if (!au1xpsc_i2s_workdata->mmio)
|
||||
goto out1;
|
||||
|
||||
/* preserve PSC clock source set up by platform (dev.platform_data
|
||||
* is already occupied by soc layer)
|
||||
*/
|
||||
sel = au_readl(PSC_SEL(au1xpsc_i2s_workdata)) & PSC_SEL_CLK_MASK;
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_SEL_PS_I2SMODE | sel, PSC_SEL(au1xpsc_i2s_workdata));
|
||||
au_writel(0, I2S_CFG(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
|
||||
/* preconfigure: set max rx/tx fifo depths */
|
||||
au1xpsc_i2s_workdata->cfg |=
|
||||
PSC_I2SCFG_RT_FIFO8 | PSC_I2SCFG_TT_FIFO8;
|
||||
|
||||
/* don't wait for I2S core to become ready now; clocks may not
|
||||
* be running yet; depending on clock input for PSC a wait might
|
||||
* time out.
|
||||
*/
|
||||
|
||||
return 0;
|
||||
|
||||
out1:
|
||||
release_resource(au1xpsc_i2s_workdata->ioarea);
|
||||
kfree(au1xpsc_i2s_workdata->ioarea);
|
||||
out0:
|
||||
kfree(au1xpsc_i2s_workdata);
|
||||
au1xpsc_i2s_workdata = NULL;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void au1xpsc_i2s_remove(struct platform_device *pdev,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
au_writel(0, I2S_CFG(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
|
||||
iounmap(au1xpsc_i2s_workdata->mmio);
|
||||
release_resource(au1xpsc_i2s_workdata->ioarea);
|
||||
kfree(au1xpsc_i2s_workdata->ioarea);
|
||||
kfree(au1xpsc_i2s_workdata);
|
||||
au1xpsc_i2s_workdata = NULL;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_suspend(struct platform_device *pdev,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
/* save interesting register and disable PSC */
|
||||
au1xpsc_i2s_workdata->pm[0] =
|
||||
au_readl(PSC_SEL(au1xpsc_i2s_workdata));
|
||||
|
||||
au_writel(0, I2S_CFG(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xpsc_i2s_resume(struct platform_device *pdev,
|
||||
struct snd_soc_dai *cpu_dai)
|
||||
{
|
||||
/* select I2S mode and PSC clock */
|
||||
au_writel(PSC_CTRL_DISABLE, PSC_CTRL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
au_writel(0, PSC_SEL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
au_writel(au1xpsc_i2s_workdata->pm[0],
|
||||
PSC_SEL(au1xpsc_i2s_workdata));
|
||||
au_sync();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_dai au1xpsc_i2s_dai = {
|
||||
.name = "au1xpsc_i2s",
|
||||
.type = SND_SOC_DAI_I2S,
|
||||
.probe = au1xpsc_i2s_probe,
|
||||
.remove = au1xpsc_i2s_remove,
|
||||
.suspend = au1xpsc_i2s_suspend,
|
||||
.resume = au1xpsc_i2s_resume,
|
||||
.playback = {
|
||||
.rates = AU1XPSC_I2S_RATES,
|
||||
.formats = AU1XPSC_I2S_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 8, /* 2 without external help */
|
||||
},
|
||||
.capture = {
|
||||
.rates = AU1XPSC_I2S_RATES,
|
||||
.formats = AU1XPSC_I2S_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 8, /* 2 without external help */
|
||||
},
|
||||
.ops = {
|
||||
.trigger = au1xpsc_i2s_trigger,
|
||||
.hw_params = au1xpsc_i2s_hw_params,
|
||||
},
|
||||
.dai_ops = {
|
||||
.set_fmt = au1xpsc_i2s_set_fmt,
|
||||
},
|
||||
};
|
||||
EXPORT_SYMBOL(au1xpsc_i2s_dai);
|
||||
|
||||
static int __init au1xpsc_i2s_init(void)
|
||||
{
|
||||
au1xpsc_i2s_workdata = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit au1xpsc_i2s_exit(void)
|
||||
{
|
||||
}
|
||||
|
||||
module_init(au1xpsc_i2s_init);
|
||||
module_exit(au1xpsc_i2s_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au12x0/Au1550 PSC I2S ALSA ASoC audio driver");
|
||||
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
/*
|
||||
* Au12x0/Au1550 PSC ALSA ASoC audio support.
|
||||
*
|
||||
* (c) 2007-2008 MSC Vertriebsges.m.b.H.,
|
||||
* Manuel Lauss <mano@roarinelk.homelinux.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* NOTE: all of these drivers can only work with a SINGLE instance
|
||||
* of a PSC. Multiple independent audio devices are impossible
|
||||
* with ASoC v1.
|
||||
*/
|
||||
|
||||
#ifndef _AU1X_PCM_H
|
||||
#define _AU1X_PCM_H
|
||||
|
||||
extern struct snd_soc_dai au1xpsc_ac97_dai;
|
||||
extern struct snd_soc_dai au1xpsc_i2s_dai;
|
||||
extern struct snd_soc_platform au1xpsc_soc_platform;
|
||||
extern struct snd_ac97_bus_ops soc_ac97_ops;
|
||||
|
||||
struct au1xpsc_audio_data {
|
||||
void __iomem *mmio;
|
||||
|
||||
unsigned long cfg;
|
||||
unsigned long rate;
|
||||
|
||||
unsigned long pm[2];
|
||||
struct resource *ioarea;
|
||||
};
|
||||
|
||||
#define PCM_TX 0
|
||||
#define PCM_RX 1
|
||||
|
||||
#define SUBSTREAM_TYPE(substream) \
|
||||
((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
|
||||
|
||||
/* easy access macros */
|
||||
#define PSC_CTRL(x) ((unsigned long)((x)->mmio) + PSC_CTRL_OFFSET)
|
||||
#define PSC_SEL(x) ((unsigned long)((x)->mmio) + PSC_SEL_OFFSET)
|
||||
#define I2S_STAT(x) ((unsigned long)((x)->mmio) + PSC_I2SSTAT_OFFSET)
|
||||
#define I2S_CFG(x) ((unsigned long)((x)->mmio) + PSC_I2SCFG_OFFSET)
|
||||
#define I2S_PCR(x) ((unsigned long)((x)->mmio) + PSC_I2SPCR_OFFSET)
|
||||
#define AC97_CFG(x) ((unsigned long)((x)->mmio) + PSC_AC97CFG_OFFSET)
|
||||
#define AC97_CDC(x) ((unsigned long)((x)->mmio) + PSC_AC97CDC_OFFSET)
|
||||
#define AC97_EVNT(x) ((unsigned long)((x)->mmio) + PSC_AC97EVNT_OFFSET)
|
||||
#define AC97_PCR(x) ((unsigned long)((x)->mmio) + PSC_AC97PCR_OFFSET)
|
||||
#define AC97_RST(x) ((unsigned long)((x)->mmio) + PSC_AC97RST_OFFSET)
|
||||
#define AC97_STAT(x) ((unsigned long)((x)->mmio) + PSC_AC97STAT_OFFSET)
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,144 @@
|
|||
/*
|
||||
* Sample Au12x0/Au1550 PSC AC97 sound machine.
|
||||
*
|
||||
* Copyright (c) 2007-2008 Manuel Lauss <mano@roarinelk.homelinux.net>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms outlined in the file COPYING at the root of this
|
||||
* source archive.
|
||||
*
|
||||
* This is a very generic AC97 sound machine driver for boards which
|
||||
* have (AC97) audio at PSC1 (e.g. DB1200 demoboards).
|
||||
*/
|
||||
|
||||
#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 <asm/mach-au1x00/au1000.h>
|
||||
#include <asm/mach-au1x00/au1xxx_psc.h>
|
||||
#include <asm/mach-au1x00/au1xxx_dbdma.h>
|
||||
|
||||
#include "../codecs/ac97.h"
|
||||
#include "psc.h"
|
||||
|
||||
static int au1xpsc_sample_ac97_init(struct snd_soc_codec *codec)
|
||||
{
|
||||
snd_soc_dapm_sync(codec);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_soc_dai_link au1xpsc_sample_ac97_dai = {
|
||||
.name = "AC97",
|
||||
.stream_name = "AC97 HiFi",
|
||||
.cpu_dai = &au1xpsc_ac97_dai, /* see psc-ac97.c */
|
||||
.codec_dai = &ac97_dai, /* see codecs/ac97.c */
|
||||
.init = au1xpsc_sample_ac97_init,
|
||||
.ops = NULL,
|
||||
};
|
||||
|
||||
static struct snd_soc_machine au1xpsc_sample_ac97_machine = {
|
||||
.name = "Au1xxx PSC AC97 Audio",
|
||||
.dai_link = &au1xpsc_sample_ac97_dai,
|
||||
.num_links = 1,
|
||||
};
|
||||
|
||||
static struct snd_soc_device au1xpsc_sample_ac97_devdata = {
|
||||
.machine = &au1xpsc_sample_ac97_machine,
|
||||
.platform = &au1xpsc_soc_platform, /* see dbdma2.c */
|
||||
.codec_dev = &soc_codec_dev_ac97,
|
||||
};
|
||||
|
||||
static struct resource au1xpsc_psc1_res[] = {
|
||||
[0] = {
|
||||
.start = CPHYSADDR(PSC1_BASE_ADDR),
|
||||
.end = CPHYSADDR(PSC1_BASE_ADDR) + 0x000fffff,
|
||||
.flags = IORESOURCE_MEM,
|
||||
},
|
||||
[1] = {
|
||||
#ifdef CONFIG_SOC_AU1200
|
||||
.start = AU1200_PSC1_INT,
|
||||
.end = AU1200_PSC1_INT,
|
||||
#elif defined(CONFIG_SOC_AU1550)
|
||||
.start = AU1550_PSC1_INT,
|
||||
.end = AU1550_PSC1_INT,
|
||||
#endif
|
||||
.flags = IORESOURCE_IRQ,
|
||||
},
|
||||
[2] = {
|
||||
.start = DSCR_CMD0_PSC1_TX,
|
||||
.end = DSCR_CMD0_PSC1_TX,
|
||||
.flags = IORESOURCE_DMA,
|
||||
},
|
||||
[3] = {
|
||||
.start = DSCR_CMD0_PSC1_RX,
|
||||
.end = DSCR_CMD0_PSC1_RX,
|
||||
.flags = IORESOURCE_DMA,
|
||||
},
|
||||
};
|
||||
|
||||
static struct platform_device *au1xpsc_sample_ac97_dev;
|
||||
|
||||
static int __init au1xpsc_sample_ac97_load(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
#ifdef CONFIG_SOC_AU1200
|
||||
unsigned long io;
|
||||
|
||||
/* modify sys_pinfunc for AC97 on PSC1 */
|
||||
io = au_readl(SYS_PINFUNC);
|
||||
io |= SYS_PINFUNC_P1C;
|
||||
io &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B);
|
||||
au_writel(io, SYS_PINFUNC);
|
||||
au_sync();
|
||||
#endif
|
||||
|
||||
ret = -ENOMEM;
|
||||
|
||||
/* setup PSC clock source for AC97 part: external clock provided
|
||||
* by codec. The psc-ac97.c driver depends on this setting!
|
||||
*/
|
||||
au_writel(PSC_SEL_CLK_SERCLK, PSC1_BASE_ADDR + PSC_SEL_OFFSET);
|
||||
au_sync();
|
||||
|
||||
au1xpsc_sample_ac97_dev = platform_device_alloc("soc-audio", -1);
|
||||
if (!au1xpsc_sample_ac97_dev)
|
||||
goto out;
|
||||
|
||||
au1xpsc_sample_ac97_dev->resource =
|
||||
kmemdup(au1xpsc_psc1_res, sizeof(struct resource) *
|
||||
ARRAY_SIZE(au1xpsc_psc1_res), GFP_KERNEL);
|
||||
au1xpsc_sample_ac97_dev->num_resources = ARRAY_SIZE(au1xpsc_psc1_res);
|
||||
au1xpsc_sample_ac97_dev->id = 1;
|
||||
|
||||
platform_set_drvdata(au1xpsc_sample_ac97_dev,
|
||||
&au1xpsc_sample_ac97_devdata);
|
||||
au1xpsc_sample_ac97_devdata.dev = &au1xpsc_sample_ac97_dev->dev;
|
||||
ret = platform_device_add(au1xpsc_sample_ac97_dev);
|
||||
|
||||
if (ret) {
|
||||
platform_device_put(au1xpsc_sample_ac97_dev);
|
||||
au1xpsc_sample_ac97_dev = NULL;
|
||||
}
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit au1xpsc_sample_ac97_exit(void)
|
||||
{
|
||||
platform_device_unregister(au1xpsc_sample_ac97_dev);
|
||||
}
|
||||
|
||||
module_init(au1xpsc_sample_ac97_load);
|
||||
module_exit(au1xpsc_sample_ac97_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au1xxx PSC sample AC97 machine");
|
||||
MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
|
||||
Loading…
Reference in New Issue