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ASoC: Merge AT91 and AVR32 support into a single atmel architecture 

The Ateml AT91 and AVR32 SoC share common IP for audio and can share the
same driver code using the atmel-ssc API provided for both architectures.
Do this, creating a new unified atmel ASoC architecture to replace the
previous at32 and at91 ones.

[This was contributed as a patch series for reviewability but has been
squashed down to a single commit to help preserve both the history and
bisectability.  A small bugfix from Jukka is included.]

Tested-by: Jukka Hynninen <ext-jukka.hynninen@vaisala.com>
Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Sedji Gaouaou 2008-10-03 16:57:50 +02:00 committed by Mark Brown
parent dc06102a0c
commit 6c7425095c
20 changed files with 1232 additions and 2566 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sound/soc/Kconfig
View File

@ -23,8 +23,7 @@ config SND_SOC_AC97_BUS
bool
# All the supported Soc's
source "sound/soc/at32/Kconfig"
source "sound/soc/at91/Kconfig"
source "sound/soc/atmel/Kconfig"
source "sound/soc/au1x/Kconfig"
source "sound/soc/pxa/Kconfig"
source "sound/soc/s3c24xx/Kconfig"

2
sound/soc/Makefile
View File

@ -1,5 +1,5 @@
snd-soc-core-objs := soc-core.o soc-dapm.o
obj-$(CONFIG_SND_SOC) += snd-soc-core.o
obj-$(CONFIG_SND_SOC) += codecs/ at32/ at91/ pxa/ s3c24xx/ sh/ fsl/ davinci/
obj-$(CONFIG_SND_SOC) += codecs/ atmel/ pxa/ s3c24xx/ sh/ fsl/ davinci/
obj-$(CONFIG_SND_SOC) += omap/ au1x/ blackfin/

34
sound/soc/at32/Kconfig
View File

@ -1,34 +0,0 @@
config SND_AT32_SOC
tristate "SoC Audio for the Atmel AT32 System-on-a-Chip"
depends on AVR32 && SND_SOC
help
Say Y or M if you want to add support for codecs attached to
the AT32 SSC interface. You will also need to
to select the audio interfaces to support below.
config SND_AT32_SOC_SSC
tristate
config SND_AT32_SOC_PLAYPAQ
tristate "SoC Audio support for PlayPaq with WM8510"
depends on SND_AT32_SOC && BOARD_PLAYPAQ
select SND_AT32_SOC_SSC
select SND_SOC_WM8510
help
Say Y or M here if you want to add support for SoC audio
on the LRS PlayPaq.
config SND_AT32_SOC_PLAYPAQ_SLAVE
bool "Run CODEC on PlayPaq in slave mode"
depends on SND_AT32_SOC_PLAYPAQ
default n
help
Say Y if you want to run with the AT32 SSC generating the BCLK
and FRAME signals on the PlayPaq. Unless you want to play
with the AT32 as the SSC master, you probably want to say N here,
as this will give you better sound quality.

11
sound/soc/at32/Makefile
View File

@ -1,11 +0,0 @@
# AT32 Platform Support
snd-soc-at32-objs := at32-pcm.o
snd-soc-at32-ssc-objs := at32-ssc.o
obj-$(CONFIG_SND_AT32_SOC) += snd-soc-at32.o
obj-$(CONFIG_SND_AT32_SOC_SSC) += snd-soc-at32-ssc.o
# AT32 Machine Support
snd-soc-playpaq-objs := playpaq_wm8510.o
obj-$(CONFIG_SND_AT32_SOC_PLAYPAQ) += snd-soc-playpaq.o

79
sound/soc/at32/at32-pcm.h
View File

@ -1,79 +0,0 @@
/* sound/soc/at32/at32-pcm.h
* ASoC PCM interface for Atmel AT32 SoC
*
* Copyright (C) 2008 Long Range Systems
* Geoffrey Wossum <gwossum@acm.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __SOUND_SOC_AT32_AT32_PCM_H
#define __SOUND_SOC_AT32_AT32_PCM_H __FILE__
#include <linux/atmel-ssc.h>
/*
* Registers and status bits that are required by the PCM driver
* TODO: Is ptcr really used?
*/
struct at32_pdc_regs {
u32 xpr; /* PDC RX/TX pointer */
u32 xcr; /* PDC RX/TX counter */
u32 xnpr; /* PDC next RX/TX pointer */
u32 xncr; /* PDC next RX/TX counter */
u32 ptcr; /* PDC transfer control */
};
/*
* SSC mask info
*/
struct at32_ssc_mask {
u32 ssc_enable; /* SSC RX/TX enable */
u32 ssc_disable; /* SSC RX/TX disable */
u32 ssc_endx; /* SSC ENDTX or ENDRX */
u32 ssc_endbuf; /* SSC TXBUFF or RXBUFF */
u32 pdc_enable; /* PDC RX/TX enable */
u32 pdc_disable; /* PDC RX/TX disable */
};
/*
* This structure, shared between the PCM driver and the interface,
* contains all information required by the PCM driver to perform the
* PDC DMA operation. All fields except dma_intr_handler() are initialized
* by the interface. The dms_intr_handler() pointer is set by the PCM
* driver and called by the interface SSC interrupt handler if it is
* non-NULL.
*/
struct at32_pcm_dma_params {
char *name; /* stream identifier */
int pdc_xfer_size; /* PDC counter increment in bytes */
struct ssc_device *ssc; /* SSC device for stream */
struct at32_pdc_regs *pdc; /* PDC register info */
struct at32_ssc_mask *mask; /* SSC mask info */
struct snd_pcm_substream *substream;
void (*dma_intr_handler) (u32, struct snd_pcm_substream *);
};
/*
* The AT32 ASoC platform driver
*/
extern struct snd_soc_platform at32_soc_platform;
/*
* SSC register access (since ssc_writel() / ssc_readl() require literal name)
*/
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
#endif /* __SOUND_SOC_AT32_AT32_PCM_H */

849
sound/soc/at32/at32-ssc.c
View File

@ -1,849 +0,0 @@
/* sound/soc/at32/at32-ssc.c
* ASoC platform driver for AT32 using SSC as DAI
*
* Copyright (C) 2008 Long Range Systems
* Geoffrey Wossum <gwossum@acm.org>
*
* 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 that this is basically a port of the sound/soc/at91-ssc.c to
* the AVR32 kernel. Thanks to Frank Mandarino for that code.
*/
/* #define DEBUG */
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel-ssc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include "at32-pcm.h"
#include "at32-ssc.h"
/*-------------------------------------------------------------------------*\
* Constants
\*-------------------------------------------------------------------------*/
#define NUM_SSC_DEVICES 3
/*
* SSC direction masks
*/
#define SSC_DIR_MASK_UNUSED 0
#define SSC_DIR_MASK_PLAYBACK 1
#define SSC_DIR_MASK_CAPTURE 2
/*
* SSC register values that Atmel left out of <linux/atmel-ssc.h>. These
* are expected to be used with SSC_BF
*/
/* START bit field values */
#define SSC_START_CONTINUOUS 0
#define SSC_START_TX_RX 1
#define SSC_START_LOW_RF 2
#define SSC_START_HIGH_RF 3
#define SSC_START_FALLING_RF 4
#define SSC_START_RISING_RF 5
#define SSC_START_LEVEL_RF 6
#define SSC_START_EDGE_RF 7
#define SSS_START_COMPARE_0 8
/* CKI bit field values */
#define SSC_CKI_FALLING 0
#define SSC_CKI_RISING 1
/* CKO bit field values */
#define SSC_CKO_NONE 0
#define SSC_CKO_CONTINUOUS 1
#define SSC_CKO_TRANSFER 2
/* CKS bit field values */
#define SSC_CKS_DIV 0
#define SSC_CKS_CLOCK 1
#define SSC_CKS_PIN 2
/* FSEDGE bit field values */
#define SSC_FSEDGE_POSITIVE 0
#define SSC_FSEDGE_NEGATIVE 1
/* FSOS bit field values */
#define SSC_FSOS_NONE 0
#define SSC_FSOS_NEGATIVE 1
#define SSC_FSOS_POSITIVE 2
#define SSC_FSOS_LOW 3
#define SSC_FSOS_HIGH 4
#define SSC_FSOS_TOGGLE 5
#define START_DELAY 1
/*-------------------------------------------------------------------------*\
* Module data
\*-------------------------------------------------------------------------*/
/*
* SSC PDC registered required by the PCM DMA engine
*/
static struct at32_pdc_regs pdc_tx_reg = {
.xpr = SSC_PDC_TPR,
.xcr = SSC_PDC_TCR,
.xnpr = SSC_PDC_TNPR,
.xncr = SSC_PDC_TNCR,
};
static struct at32_pdc_regs pdc_rx_reg = {
.xpr = SSC_PDC_RPR,
.xcr = SSC_PDC_RCR,
.xnpr = SSC_PDC_RNPR,
.xncr = SSC_PDC_RNCR,
};
/*
* SSC and PDC status bits for transmit and receive
*/
static struct at32_ssc_mask ssc_tx_mask = {
.ssc_enable = SSC_BIT(CR_TXEN),
.ssc_disable = SSC_BIT(CR_TXDIS),
.ssc_endx = SSC_BIT(SR_ENDTX),
.ssc_endbuf = SSC_BIT(SR_TXBUFE),
.pdc_enable = SSC_BIT(PDC_PTCR_TXTEN),
.pdc_disable = SSC_BIT(PDC_PTCR_TXTDIS),
};
static struct at32_ssc_mask ssc_rx_mask = {
.ssc_enable = SSC_BIT(CR_RXEN),
.ssc_disable = SSC_BIT(CR_RXDIS),
.ssc_endx = SSC_BIT(SR_ENDRX),
.ssc_endbuf = SSC_BIT(SR_RXBUFF),
.pdc_enable = SSC_BIT(PDC_PTCR_RXTEN),
.pdc_disable = SSC_BIT(PDC_PTCR_RXTDIS),
};
/*
* DMA parameters for each SSC
*/
static struct at32_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
{
{
.name = "SSC0 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC0 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
},
},
{
{
.name = "SSC1 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC1 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
},
},
{
{
.name = "SSC2 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC2 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
},
},
};
static struct at32_ssc_info ssc_info[NUM_SSC_DEVICES] = {
{
.name = "ssc0",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[0].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
{
.name = "ssc1",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
{
.name = "ssc2",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[2].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
};
/*-------------------------------------------------------------------------*\
* ISR
\*-------------------------------------------------------------------------*/
/*
* SSC interrupt handler. Passes PDC interrupts to the DMA interrupt
* handler in the PCM driver.
*/
static irqreturn_t at32_ssc_interrupt(int irq, void *dev_id)
{
struct at32_ssc_info *ssc_p = dev_id;
struct at32_pcm_dma_params *dma_params;
u32 ssc_sr;
u32 ssc_substream_mask;
int i;
ssc_sr = (ssc_readl(ssc_p->ssc->regs, SR) &
ssc_readl(ssc_p->ssc->regs, IMR));
/*
* Loop through substreams attached to this SSC. If a DMA-related
* interrupt occured on that substream, call the DMA interrupt
* handler function, if one has been registered in the dma_param
* structure by the PCM driver.
*/
for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
dma_params = ssc_p->dma_params[i];
if ((dma_params != NULL) &&
(dma_params->dma_intr_handler != NULL)) {
ssc_substream_mask = (dma_params->mask->ssc_endx |
dma_params->mask->ssc_endbuf);
if (ssc_sr & ssc_substream_mask) {
dma_params->dma_intr_handler(ssc_sr,
dma_params->
substream);
}
}
}
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*\
* DAI functions
\*-------------------------------------------------------------------------*/
/*
* Startup. Only that one substream allowed in each direction.
*/
static int at32_ssc_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at32_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
int dir_mask;
dir_mask = ((substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
SSC_DIR_MASK_PLAYBACK : SSC_DIR_MASK_CAPTURE);
spin_lock_irq(&ssc_p->lock);
if (ssc_p->dir_mask & dir_mask) {
spin_unlock_irq(&ssc_p->lock);
return -EBUSY;
}
ssc_p->dir_mask |= dir_mask;
spin_unlock_irq(&ssc_p->lock);
return 0;
}
/*
* Shutdown. Clear DMA parameters and shutdown the SSC if there
* are no other substreams open.
*/
static void at32_ssc_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at32_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct at32_pcm_dma_params *dma_params;
int dir_mask;
dma_params = ssc_p->dma_params[substream->stream];
if (dma_params != NULL) {
ssc_writel(dma_params->ssc->regs, CR,
dma_params->mask->ssc_disable);
pr_debug("%s disabled SSC_SR=0x%08x\n",
(substream->stream ? "receiver" : "transmit"),
ssc_readl(ssc_p->ssc->regs, SR));
dma_params->ssc = NULL;
dma_params->substream = NULL;
ssc_p->dma_params[substream->stream] = NULL;
}
dir_mask = 1 << substream->stream;
spin_lock_irq(&ssc_p->lock);
ssc_p->dir_mask &= ~dir_mask;
if (!ssc_p->dir_mask) {
/* Shutdown the SSC clock */
pr_debug("at32-ssc: Stopping user %d clock\n",
ssc_p->ssc->user);
clk_disable(ssc_p->ssc->clk);
if (ssc_p->initialized) {
free_irq(ssc_p->ssc->irq, ssc_p);
ssc_p->initialized = 0;
}
/* Reset the SSC */
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
/* clear the SSC dividers */
ssc_p->cmr_div = 0;
ssc_p->tcmr_period = 0;
ssc_p->rcmr_period = 0;
}
spin_unlock_irq(&ssc_p->lock);
}
/*
* Set the SSC system clock rate
*/
static int at32_ssc_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
/* TODO: What the heck do I do here? */
return 0;
}
/*
* Record DAI format for use by hw_params()
*/
static int at32_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct at32_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
ssc_p->daifmt = fmt;
return 0;
}
/*
* Record SSC clock dividers for use in hw_params()
*/
static int at32_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
struct at32_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
switch (div_id) {
case AT32_SSC_CMR_DIV:
/*
* The same master clock divider is used for both
* transmit and receive, so if a value has already
* been set, it must match this value
*/
if (ssc_p->cmr_div == 0)
ssc_p->cmr_div = div;
else if (div != ssc_p->cmr_div)
return -EBUSY;
break;
case AT32_SSC_TCMR_PERIOD:
ssc_p->tcmr_period = div;
break;
case AT32_SSC_RCMR_PERIOD:
ssc_p->rcmr_period = div;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* Configure the SSC
*/
static int at32_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int id = rtd->dai->cpu_dai->id;
struct at32_ssc_info *ssc_p = &ssc_info[id];
struct at32_pcm_dma_params *dma_params;
int channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
int start_event;
int ret;
/*
* Currently, there is only one set of dma_params for each direction.
* If more are added, this code will have to be changed to select
* the proper set
*/
dma_params = &ssc_dma_params[id][substream->stream];
dma_params->ssc = ssc_p->ssc;
dma_params->substream = substream;
ssc_p->dma_params[substream->stream] = dma_params;
/*
* The cpu_dai->dma_data field is only used to communicate the
* appropriate DMA parameters to the PCM driver's hw_params()
* function. It should not be used for other purposes as it
* is common to all substreams.
*/
rtd->dai->cpu_dai->dma_data = dma_params;
channels = params_channels(params);
/*
* Determine sample size in bits and the PDC increment
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
dma_params->pdc_xfer_size = 1;
break;
case SNDRV_PCM_FORMAT_S16:
bits = 16;
dma_params->pdc_xfer_size = 2;
break;
case SNDRV_PCM_FORMAT_S24:
bits = 24;
dma_params->pdc_xfer_size = 4;
break;
case SNDRV_PCM_FORMAT_S32:
bits = 32;
dma_params->pdc_xfer_size = 4;
break;
default:
pr_warning("at32-ssc: Unsupported PCM format %d",
params_format(params));
return -EINVAL;
}
pr_debug("at32-ssc: bits = %d, pdc_xfer_size = %d, channels = %d\n",
bits, dma_params->pdc_xfer_size, channels);
/*
* The SSC only supports up to 16-bit samples in I2S format, due
* to the size of the Frame Mode Register FSLEN field.
*/
if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S)
if (bits > 16) {
pr_warning("at32-ssc: "
"sample size %d is too large for I2S\n",
bits);
return -EINVAL;
}
/*
* Compute the SSC register settings
*/
switch (ssc_p->daifmt & (SND_SOC_DAIFMT_FORMAT_MASK |
SND_SOC_DAIFMT_MASTER_MASK)) {
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
* I2S format, SSC provides BCLK and LRS clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line
*/
pr_debug("at32-ssc: SSC mode is I2S BCLK / FRAME master\n");
rcmr = (SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period) |
SSC_BF(RCMR_STTDLY, START_DELAY) |
SSC_BF(RCMR_START, SSC_START_FALLING_RF) |
SSC_BF(RCMR_CKI, SSC_CKI_RISING) |
SSC_BF(RCMR_CKO, SSC_CKO_NONE) |
SSC_BF(RCMR_CKS, SSC_CKS_DIV));
rfmr = (SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(RFMR_FSOS, SSC_FSOS_NEGATIVE) |
SSC_BF(RFMR_FSLEN, bits - 1) |
SSC_BF(RFMR_DATNB, channels - 1) |
SSC_BIT(RFMR_MSBF) | SSC_BF(RFMR_DATLEN, bits - 1));
tcmr = (SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period) |
SSC_BF(TCMR_STTDLY, START_DELAY) |
SSC_BF(TCMR_START, SSC_START_FALLING_RF) |
SSC_BF(TCMR_CKI, SSC_CKI_FALLING) |
SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS) |
SSC_BF(TCMR_CKS, SSC_CKS_DIV));
tfmr = (SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(TFMR_FSOS, SSC_FSOS_NEGATIVE) |
SSC_BF(TFMR_FSLEN, bits - 1) |
SSC_BF(TFMR_DATNB, channels - 1) | SSC_BIT(TFMR_MSBF) |
SSC_BF(TFMR_DATLEN, bits - 1));
break;
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
/*
* I2S format, CODEC supplies BCLK and LRC clock.
*
* The SSC transmit clock is obtained from the BCLK signal
* on the TK line, and the SSC receive clock is generated from
* the transmit clock.
*
* For single channel data, one sample is transferred on the
* falling edge of the LRC clock. For two channel data, one
* sample is transferred on both edges of the LRC clock.
*/
pr_debug("at32-ssc: SSC mode is I2S BCLK / FRAME slave\n");
start_event = ((channels == 1) ?
SSC_START_FALLING_RF : SSC_START_EDGE_RF);
rcmr = (SSC_BF(RCMR_STTDLY, START_DELAY) |
SSC_BF(RCMR_START, start_event) |
SSC_BF(RCMR_CKI, SSC_CKI_RISING) |
SSC_BF(RCMR_CKO, SSC_CKO_NONE) |
SSC_BF(RCMR_CKS, SSC_CKS_CLOCK));
rfmr = (SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(RFMR_FSOS, SSC_FSOS_NONE) |
SSC_BIT(RFMR_MSBF) | SSC_BF(RFMR_DATLEN, bits - 1));
tcmr = (SSC_BF(TCMR_STTDLY, START_DELAY) |
SSC_BF(TCMR_START, start_event) |
SSC_BF(TCMR_CKI, SSC_CKI_FALLING) |
SSC_BF(TCMR_CKO, SSC_CKO_NONE) |
SSC_BF(TCMR_CKS, SSC_CKS_PIN));
tfmr = (SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(TFMR_FSOS, SSC_FSOS_NONE) |
SSC_BIT(TFMR_MSBF) | SSC_BF(TFMR_DATLEN, bits - 1));
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
/*
* DSP/PCM Mode A format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line
*/
pr_debug("at32-ssc: SSC mode is DSP A BCLK / FRAME master\n");
rcmr = (SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period) |
SSC_BF(RCMR_STTDLY, 1) |
SSC_BF(RCMR_START, SSC_START_RISING_RF) |
SSC_BF(RCMR_CKI, SSC_CKI_RISING) |
SSC_BF(RCMR_CKO, SSC_CKO_NONE) |
SSC_BF(RCMR_CKS, SSC_CKS_DIV));
rfmr = (SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(RFMR_FSOS, SSC_FSOS_POSITIVE) |
SSC_BF(RFMR_DATNB, channels - 1) |
SSC_BIT(RFMR_MSBF) | SSC_BF(RFMR_DATLEN, bits - 1));
tcmr = (SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period) |
SSC_BF(TCMR_STTDLY, 1) |
SSC_BF(TCMR_START, SSC_START_RISING_RF) |
SSC_BF(TCMR_CKI, SSC_CKI_RISING) |
SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS) |
SSC_BF(TCMR_CKS, SSC_CKS_DIV));
tfmr = (SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE) |
SSC_BF(TFMR_FSOS, SSC_FSOS_POSITIVE) |
SSC_BF(TFMR_DATNB, channels - 1) |
SSC_BIT(TFMR_MSBF) | SSC_BF(TFMR_DATLEN, bits - 1));
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
default:
pr_warning("at32-ssc: unsupported DAI format 0x%x\n",
ssc_p->daifmt);
return -EINVAL;
break;
}
pr_debug("at32-ssc: RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n",
rcmr, rfmr, tcmr, tfmr);
if (!ssc_p->initialized) {
/* enable peripheral clock */
pr_debug("at32-ssc: Starting clock\n");
clk_enable(ssc_p->ssc->clk);
/* Reset the SSC and its PDC registers */
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0);
ret = request_irq(ssc_p->ssc->irq, at32_ssc_interrupt, 0,
ssc_p->name, ssc_p);
if (ret < 0) {
pr_warning("at32-ssc: request irq failed (%d)\n", ret);
pr_debug("at32-ssc: Stopping clock\n");
clk_disable(ssc_p->ssc->clk);
return ret;
}
ssc_p->initialized = 1;
}
/* Set SSC clock mode register */
ssc_writel(ssc_p->ssc->regs, CMR, ssc_p->cmr_div);
/* set receive clock mode and format */
ssc_writel(ssc_p->ssc->regs, RCMR, rcmr);
ssc_writel(ssc_p->ssc->regs, RFMR, rfmr);
/* set transmit clock mode and format */
ssc_writel(ssc_p->ssc->regs, TCMR, tcmr);
ssc_writel(ssc_p->ssc->regs, TFMR, tfmr);
pr_debug("at32-ssc: SSC initialized\n");
return 0;
}
static int at32_ssc_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at32_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct at32_pcm_dma_params *dma_params;
dma_params = ssc_p->dma_params[substream->stream];
ssc_writel(dma_params->ssc->regs, CR, dma_params->mask->ssc_enable);
return 0;
}
#ifdef CONFIG_PM
static int at32_ssc_suspend(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct at32_ssc_info *ssc_p;
if (!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
/* Save the status register before disabling transmit and receive */
ssc_p->ssc_state.ssc_sr = ssc_readl(ssc_p->ssc->regs, SR);
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_TXDIS) | SSC_BIT(CR_RXDIS));
/* Save the current interrupt mask, then disable unmasked interrupts */
ssc_p->ssc_state.ssc_imr = ssc_readl(ssc_p->ssc->regs, IMR);
ssc_writel(ssc_p->ssc->regs, IDR, ssc_p->ssc_state.ssc_imr);
ssc_p->ssc_state.ssc_cmr = ssc_readl(ssc_p->ssc->regs, CMR);
ssc_p->ssc_state.ssc_rcmr = ssc_readl(ssc_p->ssc->regs, RCMR);
ssc_p->ssc_state.ssc_rfmr = ssc_readl(ssc_p->ssc->regs, RFMR);
ssc_p->ssc_state.ssc_tcmr = ssc_readl(ssc_p->ssc->regs, TCMR);
ssc_p->ssc_state.ssc_tfmr = ssc_readl(ssc_p->ssc->regs, TFMR);
return 0;
}
static int at32_ssc_resume(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct at32_ssc_info *ssc_p;
u32 cr;
if (!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
/* restore SSC register settings */
ssc_writel(ssc_p->ssc->regs, TFMR, ssc_p->ssc_state.ssc_tfmr);
ssc_writel(ssc_p->ssc->regs, TCMR, ssc_p->ssc_state.ssc_tcmr);
ssc_writel(ssc_p->ssc->regs, RFMR, ssc_p->ssc_state.ssc_rfmr);
ssc_writel(ssc_p->ssc->regs, RCMR, ssc_p->ssc_state.ssc_rcmr);
ssc_writel(ssc_p->ssc->regs, CMR, ssc_p->ssc_state.ssc_cmr);
/* re-enable interrupts */
ssc_writel(ssc_p->ssc->regs, IER, ssc_p->ssc_state.ssc_imr);
/* Re-enable recieve and transmit as appropriate */
cr = 0;
cr |=
(ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_RXEN)) ? SSC_BIT(CR_RXEN) : 0;
cr |=
(ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_TXEN)) ? SSC_BIT(CR_TXEN) : 0;
ssc_writel(ssc_p->ssc->regs, CR, cr);
return 0;
}
#else /* CONFIG_PM */
# define at32_ssc_suspend NULL
# define at32_ssc_resume NULL
#endif /* CONFIG_PM */
#define AT32_SSC_RATES \
(SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \
SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define AT32_SSC_FORMATS \
(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16 | \
SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_S32)
struct snd_soc_dai at32_ssc_dai[NUM_SSC_DEVICES] = {
{
.name = "at32-ssc0",
.id = 0,
.type = SND_SOC_DAI_PCM,
.suspend = at32_ssc_suspend,
.resume = at32_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.ops = {
.startup = at32_ssc_startup,
.shutdown = at32_ssc_shutdown,
.prepare = at32_ssc_prepare,
.hw_params = at32_ssc_hw_params,
},
.dai_ops = {
.set_sysclk = at32_ssc_set_dai_sysclk,
.set_fmt = at32_ssc_set_dai_fmt,
.set_clkdiv = at32_ssc_set_dai_clkdiv,
},
.private_data = &ssc_info[0],
},
{
.name = "at32-ssc1",
.id = 1,
.type = SND_SOC_DAI_PCM,
.suspend = at32_ssc_suspend,
.resume = at32_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.ops = {
.startup = at32_ssc_startup,
.shutdown = at32_ssc_shutdown,
.prepare = at32_ssc_prepare,
.hw_params = at32_ssc_hw_params,
},
.dai_ops = {
.set_sysclk = at32_ssc_set_dai_sysclk,
.set_fmt = at32_ssc_set_dai_fmt,
.set_clkdiv = at32_ssc_set_dai_clkdiv,
},
.private_data = &ssc_info[1],
},
{
.name = "at32-ssc2",
.id = 2,
.type = SND_SOC_DAI_PCM,
.suspend = at32_ssc_suspend,
.resume = at32_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT32_SSC_RATES,
.formats = AT32_SSC_FORMATS,
},
.ops = {
.startup = at32_ssc_startup,
.shutdown = at32_ssc_shutdown,
.prepare = at32_ssc_prepare,
.hw_params = at32_ssc_hw_params,
},
.dai_ops = {
.set_sysclk = at32_ssc_set_dai_sysclk,
.set_fmt = at32_ssc_set_dai_fmt,
.set_clkdiv = at32_ssc_set_dai_clkdiv,
},
.private_data = &ssc_info[2],
},
};
EXPORT_SYMBOL_GPL(at32_ssc_dai);
MODULE_AUTHOR("Geoffrey Wossum <gwossum@acm.org>");
MODULE_DESCRIPTION("AT32 SSC ASoC Interface");
MODULE_LICENSE("GPL");

59
sound/soc/at32/at32-ssc.h
View File

@ -1,59 +0,0 @@
/* sound/soc/at32/at32-ssc.h
* ASoC SSC interface for Atmel AT32 SoC
*
* Copyright (C) 2008 Long Range Systems
* Geoffrey Wossum <gwossum@acm.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __SOUND_SOC_AT32_AT32_SSC_H
#define __SOUND_SOC_AT32_AT32_SSC_H __FILE__
#include <linux/types.h>
#include <linux/atmel-ssc.h>
#include "at32-pcm.h"
struct at32_ssc_state {
u32 ssc_cmr;
u32 ssc_rcmr;
u32 ssc_rfmr;
u32 ssc_tcmr;
u32 ssc_tfmr;
u32 ssc_sr;
u32 ssc_imr;
};
struct at32_ssc_info {
char *name;
struct ssc_device *ssc;
spinlock_t lock; /* lock for dir_mask */
unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
unsigned short initialized; /* true if SSC has been initialized */
unsigned short daifmt;
unsigned short cmr_div;
unsigned short tcmr_period;
unsigned short rcmr_period;
struct at32_pcm_dma_params *dma_params[2];
struct at32_ssc_state ssc_state;
};
/* SSC divider ids */
#define AT32_SSC_CMR_DIV 0 /* MCK divider for BCLK */
#define AT32_SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */
#define AT32_SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */
extern struct snd_soc_dai at32_ssc_dai[];
#endif /* __SOUND_SOC_AT32_AT32_SSC_H */

10
sound/soc/at91/Kconfig
View File

@ -1,10 +0,0 @@
config SND_AT91_SOC
tristate "SoC Audio for the Atmel AT91 System-on-Chip"
depends on ARCH_AT91
help
Say Y or M if you want to add support for codecs attached to
the AT91 SSC interface. You will also need
to select the audio interfaces to support below.
config SND_AT91_SOC_SSC
tristate

6
sound/soc/at91/Makefile
View File

@ -1,6 +0,0 @@
# AT91 Platform Support
snd-soc-at91-objs := at91-pcm.o
snd-soc-at91-ssc-objs := at91-ssc.o
obj-$(CONFIG_SND_AT91_SOC) += snd-soc-at91.o
obj-$(CONFIG_SND_AT91_SOC_SSC) += snd-soc-at91-ssc.o

434
sound/soc/at91/at91-pcm.c
View File

@ -1,434 +0,0 @@
/*
* at91-pcm.c -- ALSA PCM interface for the Atmel AT91 SoC
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
* Created: Mar 3, 2006
*
* Based on pxa2xx-pcm.c by:
*
* Author: Nicolas Pitre
* Created: Nov 30, 2004
* Copyright: (C) 2004 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/hardware.h>
#include <mach/at91_ssc.h>
#include "at91-pcm.h"
#if 0
#define DBG(x...) printk(KERN_INFO "at91-pcm: " x)
#else
#define DBG(x...)
#endif
static const struct snd_pcm_hardware at91_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.period_bytes_min = 32,
.period_bytes_max = 8192,
.periods_min = 2,
.periods_max = 1024,
.buffer_bytes_max = 32 * 1024,
};
struct at91_runtime_data {
struct at91_pcm_dma_params *params;
dma_addr_t dma_buffer; /* physical address of dma buffer */
dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
size_t period_size;
dma_addr_t period_ptr; /* physical address of next period */
u32 pdc_xpr_save; /* PDC register save */
u32 pdc_xcr_save;
u32 pdc_xnpr_save;
u32 pdc_xncr_save;
};
static void at91_pcm_dma_irq(u32 ssc_sr,
struct snd_pcm_substream *substream)
{
struct at91_runtime_data *prtd = substream->runtime->private_data;
struct at91_pcm_dma_params *params = prtd->params;
static int count = 0;
count++;
if (ssc_sr & params->mask->ssc_endbuf) {
printk(KERN_WARNING
"at91-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? "underrun" : "overrun",
params->name, ssc_sr, count);
/* re-start the PDC */
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
prtd->period_ptr += prtd->period_size;
if (prtd->period_ptr >= prtd->dma_buffer_end) {
prtd->period_ptr = prtd->dma_buffer;
}
at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
at91_ssc_write(params->ssc_base + params->pdc->xcr,
prtd->period_size / params->pdc_xfer_size);
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
}
if (ssc_sr & params->mask->ssc_endx) {
/* Load the PDC next pointer and counter registers */
prtd->period_ptr += prtd->period_size;
if (prtd->period_ptr >= prtd->dma_buffer_end) {
prtd->period_ptr = prtd->dma_buffer;
}
at91_ssc_write(params->ssc_base + params->pdc->xnpr,
prtd->period_ptr);
at91_ssc_write(params->ssc_base + params->pdc->xncr,
prtd->period_size / params->pdc_xfer_size);
}
snd_pcm_period_elapsed(substream);
}
static int at91_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at91_runtime_data *prtd = runtime->private_data;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
/* this may get called several times by oss emulation
* with different params */
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = params_buffer_bytes(params);
prtd->params = rtd->dai->cpu_dai->dma_data;
prtd->params->dma_intr_handler = at91_pcm_dma_irq;
prtd->dma_buffer = runtime->dma_addr;
prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
prtd->period_size = params_period_bytes(params);
DBG("hw_params: DMA for %s initialized (dma_bytes=%d, period_size=%d)\n",
prtd->params->name, runtime->dma_bytes, prtd->period_size);
return 0;
}
static int at91_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct at91_runtime_data *prtd = substream->runtime->private_data;
struct at91_pcm_dma_params *params = prtd->params;
if (params != NULL) {
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
prtd->params->dma_intr_handler = NULL;
}
return 0;
}
static int at91_pcm_prepare(struct snd_pcm_substream *substream)
{
struct at91_runtime_data *prtd = substream->runtime->private_data;
struct at91_pcm_dma_params *params = prtd->params;
at91_ssc_write(params->ssc_base + AT91_SSC_IDR,
params->mask->ssc_endx | params->mask->ssc_endbuf);
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
return 0;
}
static int at91_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct at91_runtime_data *prtd = substream->runtime->private_data;
struct at91_pcm_dma_params *params = prtd->params;
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
prtd->period_ptr = prtd->dma_buffer;
at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
at91_ssc_write(params->ssc_base + params->pdc->xcr,
prtd->period_size / params->pdc_xfer_size);
prtd->period_ptr += prtd->period_size;
at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
at91_ssc_write(params->ssc_base + params->pdc->xncr,
prtd->period_size / params->pdc_xfer_size);
DBG("trigger: period_ptr=%lx, xpr=%lx, xcr=%ld, xnpr=%lx, xncr=%ld\n",
(unsigned long) prtd->period_ptr,
at91_ssc_read(params->ssc_base + params->pdc->xpr),
at91_ssc_read(params->ssc_base + params->pdc->xcr),
at91_ssc_read(params->ssc_base + params->pdc->xnpr),
at91_ssc_read(params->ssc_base + params->pdc->xncr));
at91_ssc_write(params->ssc_base + AT91_SSC_IER,
params->mask->ssc_endx | params->mask->ssc_endbuf);
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR,
params->mask->pdc_enable);
DBG("sr=%lx imr=%lx\n",
at91_ssc_read(params->ssc_base + AT91_SSC_SR),
at91_ssc_read(params->ssc_base + AT91_SSC_IMR));
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
break;
default:
ret = -EINVAL;
}
return ret;
}
static snd_pcm_uframes_t at91_pcm_pointer(
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at91_runtime_data *prtd = runtime->private_data;
struct at91_pcm_dma_params *params = prtd->params;
dma_addr_t ptr;
snd_pcm_uframes_t x;
ptr = (dma_addr_t) at91_ssc_read(params->ssc_base + params->pdc->xpr);
x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
if (x == runtime->buffer_size)
x = 0;
return x;
}
static int at91_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at91_runtime_data *prtd;
int ret = 0;
snd_soc_set_runtime_hwparams(substream, &at91_pcm_hardware);
/* ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
goto out;
prtd = kzalloc(sizeof(struct at91_runtime_data), GFP_KERNEL);
if (prtd == NULL) {
ret = -ENOMEM;
goto out;
}
runtime->private_data = prtd;
out:
return ret;
}
static int at91_pcm_close(struct snd_pcm_substream *substream)
{
struct at91_runtime_data *prtd = substream->runtime->private_data;
kfree(prtd);
return 0;
}
static int at91_pcm_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);
}
struct snd_pcm_ops at91_pcm_ops = {
.open = at91_pcm_open,
.close = at91_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = at91_pcm_hw_params,
.hw_free = at91_pcm_hw_free,
.prepare = at91_pcm_prepare,
.trigger = at91_pcm_trigger,
.pointer = at91_pcm_pointer,
.mmap = at91_pcm_mmap,
};
static int at91_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
int stream)
{
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
struct snd_dma_buffer *buf = &substream->dma_buffer;
size_t size = at91_pcm_hardware.buffer_bytes_max;
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = pcm->card->dev;
buf->private_data = NULL;
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
&buf->addr, GFP_KERNEL);
DBG("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
(void *) buf->area,
(void *) buf->addr,
size);
if (!buf->area)
return -ENOMEM;
buf->bytes = size;
return 0;
}
static u64 at91_pcm_dmamask = 0xffffffff;
static int at91_pcm_new(struct snd_card *card,
struct snd_soc_dai *dai, struct snd_pcm *pcm)
{
int ret = 0;
if (!card->dev->dma_mask)
card->dev->dma_mask = &at91_pcm_dmamask;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = 0xffffffff;
if (dai->playback.channels_min) {
ret = at91_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret)
goto out;
}
if (dai->capture.channels_min) {
ret = at91_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
if (ret)
goto out;
}
out:
return ret;
}
static void at91_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
struct snd_pcm_substream *substream;
struct snd_dma_buffer *buf;
int stream;
for (stream = 0; stream < 2; stream++) {
substream = pcm->streams[stream].substream;
if (!substream)
continue;
buf = &substream->dma_buffer;
if (!buf->area)
continue;
dma_free_writecombine(pcm->card->dev, buf->bytes,
buf->area, buf->addr);
buf->area = NULL;
}
}
#ifdef CONFIG_PM
static int at91_pcm_suspend(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = dai->runtime;
struct at91_runtime_data *prtd;
struct at91_pcm_dma_params *params;
if (!runtime)
return 0;
prtd = runtime->private_data;
params = prtd->params;
/* disable the PDC and save the PDC registers */
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_disable);
prtd->pdc_xpr_save = at91_ssc_read(params->ssc_base + params->pdc->xpr);
prtd->pdc_xcr_save = at91_ssc_read(params->ssc_base + params->pdc->xcr);
prtd->pdc_xnpr_save = at91_ssc_read(params->ssc_base + params->pdc->xnpr);
prtd->pdc_xncr_save = at91_ssc_read(params->ssc_base + params->pdc->xncr);
return 0;
}
static int at91_pcm_resume(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = dai->runtime;
struct at91_runtime_data *prtd;
struct at91_pcm_dma_params *params;
if (!runtime)
return 0;
prtd = runtime->private_data;
params = prtd->params;
/* restore the PDC registers and enable the PDC */
at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->pdc_xpr_save);
at91_ssc_write(params->ssc_base + params->pdc->xcr, prtd->pdc_xcr_save);
at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->pdc_xnpr_save);
at91_ssc_write(params->ssc_base + params->pdc->xncr, prtd->pdc_xncr_save);
at91_ssc_write(params->ssc_base + ATMEL_PDC_PTCR, params->mask->pdc_enable);
return 0;
}
#else
#define at91_pcm_suspend NULL
#define at91_pcm_resume NULL
#endif
struct snd_soc_platform at91_soc_platform = {
.name = "at91-audio",
.pcm_ops = &at91_pcm_ops,
.pcm_new = at91_pcm_new,
.pcm_free = at91_pcm_free_dma_buffers,
.suspend = at91_pcm_suspend,
.resume = at91_pcm_resume,
};
EXPORT_SYMBOL_GPL(at91_soc_platform);
MODULE_AUTHOR("Frank Mandarino <fmandarino@endrelia.com>");
MODULE_DESCRIPTION("Atmel AT91 PCM module");
MODULE_LICENSE("GPL");

72
sound/soc/at91/at91-pcm.h
View File

@ -1,72 +0,0 @@
/*
* at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
* Created: Mar 3, 2006
*
* Based on pxa2xx-pcm.h by:
*
* Author: Nicolas Pitre
* Created: Nov 30, 2004
* Copyright: MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _AT91_PCM_H
#define _AT91_PCM_H
#include <mach/hardware.h>
struct at91_ssc_periph {
void __iomem *base;
u32 pid;
};
/*
* Registers and status bits that are required by the PCM driver.
*/
struct at91_pdc_regs {
unsigned int xpr; /* PDC recv/trans pointer */
unsigned int xcr; /* PDC recv/trans counter */
unsigned int xnpr; /* PDC next recv/trans pointer */
unsigned int xncr; /* PDC next recv/trans counter */
unsigned int ptcr; /* PDC transfer control */
};
struct at91_ssc_mask {
u32 ssc_enable; /* SSC recv/trans enable */
u32 ssc_disable; /* SSC recv/trans disable */
u32 ssc_endx; /* SSC ENDTX or ENDRX */
u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
u32 pdc_enable; /* PDC recv/trans enable */
u32 pdc_disable; /* PDC recv/trans disable */
};
/*
* This structure, shared between the PCM driver and the interface,
* contains all information required by the PCM driver to perform the
* PDC DMA operation. All fields except dma_intr_handler() are initialized
* by the interface. The dms_intr_handler() pointer is set by the PCM
* driver and called by the interface SSC interrupt handler if it is
* non-NULL.
*/
struct at91_pcm_dma_params {
char *name; /* stream identifier */
int pdc_xfer_size; /* PDC counter increment in bytes */
void __iomem *ssc_base; /* SSC base address */
struct at91_pdc_regs *pdc; /* PDC receive or transmit registers */
struct at91_ssc_mask *mask;/* SSC & PDC status bits */
struct snd_pcm_substream *substream;
void (*dma_intr_handler)(u32, struct snd_pcm_substream *);
};
extern struct snd_soc_platform at91_soc_platform;
#define at91_ssc_read(a) ((unsigned long) __raw_readl(a))
#define at91_ssc_write(a,v) __raw_writel((v),(a))
#endif /* _AT91_PCM_H */

791
sound/soc/at91/at91-ssc.c
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@ -1,791 +0,0 @@
/*
* at91-ssc.c -- ALSA SoC AT91 SSC Audio Layer Platform driver
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
*
* Based on pxa2xx Platform drivers by
* Liam Girdwood <lrg@slimlogic.co.uk>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/atmel_pdc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <mach/hardware.h>
#include <mach/at91_pmc.h>
#include <mach/at91_ssc.h>
#include "at91-pcm.h"
#include "at91-ssc.h"
#if 0
#define DBG(x...) printk(KERN_DEBUG "at91-ssc:" x)
#else
#define DBG(x...)
#endif
#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#define NUM_SSC_DEVICES 1
#else
#define NUM_SSC_DEVICES 3
#endif
/*
* SSC PDC registers required by the PCM DMA engine.
*/
static struct at91_pdc_regs pdc_tx_reg = {
.xpr = ATMEL_PDC_TPR,
.xcr = ATMEL_PDC_TCR,
.xnpr = ATMEL_PDC_TNPR,
.xncr = ATMEL_PDC_TNCR,
};
static struct at91_pdc_regs pdc_rx_reg = {
.xpr = ATMEL_PDC_RPR,
.xcr = ATMEL_PDC_RCR,
.xnpr = ATMEL_PDC_RNPR,
.xncr = ATMEL_PDC_RNCR,
};
/*
* SSC & PDC status bits for transmit and receive.
*/
static struct at91_ssc_mask ssc_tx_mask = {
.ssc_enable = AT91_SSC_TXEN,
.ssc_disable = AT91_SSC_TXDIS,
.ssc_endx = AT91_SSC_ENDTX,
.ssc_endbuf = AT91_SSC_TXBUFE,
.pdc_enable = ATMEL_PDC_TXTEN,
.pdc_disable = ATMEL_PDC_TXTDIS,
};
static struct at91_ssc_mask ssc_rx_mask = {
.ssc_enable = AT91_SSC_RXEN,
.ssc_disable = AT91_SSC_RXDIS,
.ssc_endx = AT91_SSC_ENDRX,
.ssc_endbuf = AT91_SSC_RXBUFF,
.pdc_enable = ATMEL_PDC_RXTEN,
.pdc_disable = ATMEL_PDC_RXTDIS,
};
/*
* DMA parameters.
*/
static struct at91_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
{{
.name = "SSC0 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC0 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
#if NUM_SSC_DEVICES == 3
{{
.name = "SSC1 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC1 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
{{
.name = "SSC2 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC2 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
}},
#endif
};
struct at91_ssc_state {
u32 ssc_cmr;
u32 ssc_rcmr;
u32 ssc_rfmr;
u32 ssc_tcmr;
u32 ssc_tfmr;
u32 ssc_sr;
u32 ssc_imr;
};
static struct at91_ssc_info {
char *name;
struct at91_ssc_periph ssc;
spinlock_t lock; /* lock for dir_mask */
unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
unsigned short initialized; /* 1=SSC has been initialized */
unsigned short daifmt;
unsigned short cmr_div;
unsigned short tcmr_period;
unsigned short rcmr_period;
struct at91_pcm_dma_params *dma_params[2];
struct at91_ssc_state ssc_state;
} ssc_info[NUM_SSC_DEVICES] = {
{
.name = "ssc0",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[0].lock),
.dir_mask = 0,
.initialized = 0,
},
#if NUM_SSC_DEVICES == 3
{
.name = "ssc1",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
.dir_mask = 0,
.initialized = 0,
},
{
.name = "ssc2",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[2].lock),
.dir_mask = 0,
.initialized = 0,
},
#endif
};
static unsigned int at91_ssc_sysclk;
/*
* SSC interrupt handler. Passes PDC interrupts to the DMA
* interrupt handler in the PCM driver.
*/
static irqreturn_t at91_ssc_interrupt(int irq, void *dev_id)
{
struct at91_ssc_info *ssc_p = dev_id;
struct at91_pcm_dma_params *dma_params;
u32 ssc_sr;
int i;
ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR)
& at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
/*
* Loop through the substreams attached to this SSC. If
* a DMA-related interrupt occurred on that substream, call
* the DMA interrupt handler function, if one has been
* registered in the dma_params structure by the PCM driver.
*/
for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
dma_params = ssc_p->dma_params[i];
if (dma_params != NULL && dma_params->dma_intr_handler != NULL &&
(ssc_sr &
(dma_params->mask->ssc_endx | dma_params->mask->ssc_endbuf)))
dma_params->dma_intr_handler(ssc_sr, dma_params->substream);
}
return IRQ_HANDLED;
}
/*
* Startup. Only that one substream allowed in each direction.
*/
static int at91_ssc_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
int dir_mask;
DBG("ssc_startup: SSC_SR=0x%08lx\n",
at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
dir_mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0x1 : 0x2;
spin_lock_irq(&ssc_p->lock);
if (ssc_p->dir_mask & dir_mask) {
spin_unlock_irq(&ssc_p->lock);
return -EBUSY;
}
ssc_p->dir_mask |= dir_mask;
spin_unlock_irq(&ssc_p->lock);
return 0;
}
/*
* Shutdown. Clear DMA parameters and shutdown the SSC if there
* are no other substreams open.
*/
static void at91_ssc_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct at91_pcm_dma_params *dma_params;
int dir, dir_mask;
dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
dma_params = ssc_p->dma_params[dir];
if (dma_params != NULL) {
at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
dma_params->mask->ssc_disable);
DBG("%s disabled SSC_SR=0x%08lx\n", (dir ? "receive" : "transmit"),
at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
dma_params->ssc_base = NULL;
dma_params->substream = NULL;
ssc_p->dma_params[dir] = NULL;
}
dir_mask = 1 << dir;
spin_lock_irq(&ssc_p->lock);
ssc_p->dir_mask &= ~dir_mask;
if (!ssc_p->dir_mask) {
/* Shutdown the SSC clock. */
DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
if (ssc_p->initialized) {
free_irq(ssc_p->ssc.pid, ssc_p);
ssc_p->initialized = 0;
}
/* Reset the SSC */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
/* Clear the SSC dividers */
ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
}
spin_unlock_irq(&ssc_p->lock);
}
/*
* Record the SSC system clock rate.
*/
static int at91_ssc_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
/*
* The only clock supplied to the SSC is the AT91 master clock,
* which is only used if the SSC is generating BCLK and/or
* LRC clocks.
*/
switch (clk_id) {
case AT91_SYSCLK_MCK:
at91_ssc_sysclk = freq;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* Record the DAI format for use in hw_params().
*/
static int at91_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
ssc_p->daifmt = fmt;
return 0;
}
/*
* Record SSC clock dividers for use in hw_params().
*/
static int at91_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
switch (div_id) {
case AT91SSC_CMR_DIV:
/*
* The same master clock divider is used for both
* transmit and receive, so if a value has already
* been set, it must match this value.
*/
if (ssc_p->cmr_div == 0)
ssc_p->cmr_div = div;
else
if (div != ssc_p->cmr_div)
return -EBUSY;
break;
case AT91SSC_TCMR_PERIOD:
ssc_p->tcmr_period = div;
break;
case AT91SSC_RCMR_PERIOD:
ssc_p->rcmr_period = div;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* Configure the SSC.
*/
static int at91_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
int id = rtd->dai->cpu_dai->id;
struct at91_ssc_info *ssc_p = &ssc_info[id];
struct at91_pcm_dma_params *dma_params;
int dir, channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
int start_event;
int ret;
/*
* Currently, there is only one set of dma params for
* each direction. If more are added, this code will
* have to be changed to select the proper set.
*/
dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
dma_params = &ssc_dma_params[id][dir];
dma_params->ssc_base = ssc_p->ssc.base;
dma_params->substream = substream;
ssc_p->dma_params[dir] = dma_params;
/*
* The cpu_dai->dma_data field is only used to communicate the
* appropriate DMA parameters to the pcm driver hw_params()
* function. It should not be used for other purposes
* as it is common to all substreams.
*/
rtd->dai->cpu_dai->dma_data = dma_params;
channels = params_channels(params);
/*
* Determine sample size in bits and the PDC increment.
*/
switch(params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
dma_params->pdc_xfer_size = 1;
break;
case SNDRV_PCM_FORMAT_S16_LE:
bits = 16;
dma_params->pdc_xfer_size = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
bits = 24;
dma_params->pdc_xfer_size = 4;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bits = 32;
dma_params->pdc_xfer_size = 4;
break;
default:
printk(KERN_WARNING "at91-ssc: unsupported PCM format\n");
return -EINVAL;
}
/*
* The SSC only supports up to 16-bit samples in I2S format, due
* to the size of the Frame Mode Register FSLEN field.
*/
if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
&& bits > 16) {
printk(KERN_WARNING
"at91-ssc: sample size %d is too large for I2S\n", bits);
return -EINVAL;
}
/*
* Compute SSC register settings.
*/
switch (ssc_p->daifmt
& (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
* I2S format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line.
*/
rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
| (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
| (((bits - 1) << 16) & AT91_SSC_FSLEN)
| (((channels - 1) << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_LOOP)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( AT91_SSC_START_FALLING_RF ) & AT91_SSC_START)
| (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( 0 << 23) & AT91_SSC_FSDEN)
| (( AT91_SSC_FSOS_NEGATIVE ) & AT91_SSC_FSOS)
| (((bits - 1) << 16) & AT91_SSC_FSLEN)
| (((channels - 1) << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_DATDEF)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
break;
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
/*
* I2S format, CODEC supplies BCLK and LRC clocks.
*
* The SSC transmit clock is obtained from the BCLK signal on
* on the TK line, and the SSC receive clock is generated from the
* transmit clock.
*
* For single channel data, one sample is transferred on the falling
* edge of the LRC clock. For two channel data, one sample is
* transferred on both edges of the LRC clock.
*/
start_event = channels == 1
? AT91_SSC_START_FALLING_RF
: AT91_SSC_START_EDGE_RF;
rcmr = (( 0 << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( start_event ) & AT91_SSC_START)
| (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_CLOCK ) & AT91_SSC_CKS);
rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
| (( 0 << 16) & AT91_SSC_FSLEN)
| (( 0 << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_LOOP)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
tcmr = (( 0 << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( start_event ) & AT91_SSC_START)
| (( AT91_SSC_CKI_FALLING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_PIN ) & AT91_SSC_CKS);
tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( 0 << 23) & AT91_SSC_FSDEN)
| (( AT91_SSC_FSOS_NONE ) & AT91_SSC_FSOS)
| (( 0 << 16) & AT91_SSC_FSLEN)
| (( 0 << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_DATDEF)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
/*
* DSP/PCM Mode A format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output on the SSC TK line.
*/
rcmr = (( ssc_p->rcmr_period << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
| (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_NONE ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
rfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
| (( 0 << 16) & AT91_SSC_FSLEN)
| (((channels - 1) << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_LOOP)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
tcmr = (( ssc_p->tcmr_period << 24) & AT91_SSC_PERIOD)
| (( 1 << 16) & AT91_SSC_STTDLY)
| (( AT91_SSC_START_RISING_RF ) & AT91_SSC_START)
| (( AT91_SSC_CK_RISING ) & AT91_SSC_CKI)
| (( AT91_SSC_CKO_CONTINUOUS ) & AT91_SSC_CKO)
| (( AT91_SSC_CKS_DIV ) & AT91_SSC_CKS);
tfmr = (( AT91_SSC_FSEDGE_POSITIVE ) & AT91_SSC_FSEDGE)
| (( 0 << 23) & AT91_SSC_FSDEN)
| (( AT91_SSC_FSOS_POSITIVE ) & AT91_SSC_FSOS)
| (( 0 << 16) & AT91_SSC_FSLEN)
| (((channels - 1) << 8) & AT91_SSC_DATNB)
| (( 1 << 7) & AT91_SSC_MSBF)
| (( 0 << 5) & AT91_SSC_DATDEF)
| (((bits - 1) << 0) & AT91_SSC_DATALEN);
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
default:
printk(KERN_WARNING "at91-ssc: unsupported DAI format 0x%x.\n",
ssc_p->daifmt);
return -EINVAL;
break;
}
DBG("RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n", rcmr, rfmr, tcmr, tfmr);
if (!ssc_p->initialized) {
/* Enable PMC peripheral clock for this SSC */
DBG("Starting pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
/* Reset the SSC and its PDC registers */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RPR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RCR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RNPR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_RNCR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TPR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TCR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNPR, 0);
at91_ssc_write(ssc_p->ssc.base + ATMEL_PDC_TNCR, 0);
if ((ret = request_irq(ssc_p->ssc.pid, at91_ssc_interrupt,
0, ssc_p->name, ssc_p)) < 0) {
printk(KERN_WARNING "at91-ssc: request_irq failure\n");
DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
return ret;
}
ssc_p->initialized = 1;
}
/* set SSC clock mode register */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->cmr_div);
/* set receive clock mode and format */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
/* set transmit clock mode and format */
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
DBG("hw_params: SSC initialized\n");
return 0;
}
static int at91_ssc_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct at91_pcm_dma_params *dma_params;
int dir;
dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
dma_params = ssc_p->dma_params[dir];
at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
dma_params->mask->ssc_enable);
DBG("%s enabled SSC_SR=0x%08lx\n", dir ? "receive" : "transmit",
at91_ssc_read(dma_params->ssc_base + AT91_SSC_SR));
return 0;
}
#ifdef CONFIG_PM
static int at91_ssc_suspend(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct at91_ssc_info *ssc_p;
if(!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
/* Save the status register before disabling transmit and receive. */
ssc_p->ssc_state.ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
AT91_SSC_TXDIS | AT91_SSC_RXDIS);
/* Save the current interrupt mask, then disable unmasked interrupts. */
ssc_p->ssc_state.ssc_imr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IDR, ssc_p->ssc_state.ssc_imr);
ssc_p->ssc_state.ssc_cmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
ssc_p->ssc_state.ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
ssc_p->ssc_state.ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RFMR);
ssc_p->ssc_state.ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TCMR);
ssc_p->ssc_state.ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TFMR);
return 0;
}
static int at91_ssc_resume(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct at91_ssc_info *ssc_p;
if(!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, ssc_p->ssc_state.ssc_tfmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, ssc_p->ssc_state.ssc_tcmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, ssc_p->ssc_state.ssc_rfmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rcmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->ssc_state.ssc_cmr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER, ssc_p->ssc_state.ssc_imr);
at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
((ssc_p->ssc_state.ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
((ssc_p->ssc_state.ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
return 0;
}
#else
#define at91_ssc_suspend NULL
#define at91_ssc_resume NULL
#endif
#define AT91_SSC_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
SNDRV_PCM_RATE_96000)
#define AT91_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
struct snd_soc_dai at91_ssc_dai[NUM_SSC_DEVICES] = {
{ .name = "at91-ssc0",
.id = 0,
.type = SND_SOC_DAI_PCM,
.suspend = at91_ssc_suspend,
.resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.ops = {
.startup = at91_ssc_startup,
.shutdown = at91_ssc_shutdown,
.prepare = at91_ssc_prepare,
.hw_params = at91_ssc_hw_params,},
.dai_ops = {
.set_sysclk = at91_ssc_set_dai_sysclk,
.set_fmt = at91_ssc_set_dai_fmt,
.set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[0].ssc,
},
#if NUM_SSC_DEVICES == 3
{ .name = "at91-ssc1",
.id = 1,
.type = SND_SOC_DAI_PCM,
.suspend = at91_ssc_suspend,
.resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.ops = {
.startup = at91_ssc_startup,
.shutdown = at91_ssc_shutdown,
.prepare = at91_ssc_prepare,
.hw_params = at91_ssc_hw_params,},
.dai_ops = {
.set_sysclk = at91_ssc_set_dai_sysclk,
.set_fmt = at91_ssc_set_dai_fmt,
.set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[1].ssc,
},
{ .name = "at91-ssc2",
.id = 2,
.type = SND_SOC_DAI_PCM,
.suspend = at91_ssc_suspend,
.resume = at91_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = AT91_SSC_RATES,
.formats = AT91_SSC_FORMATS,},
.ops = {
.startup = at91_ssc_startup,
.shutdown = at91_ssc_shutdown,
.prepare = at91_ssc_prepare,
.hw_params = at91_ssc_hw_params,},
.dai_ops = {
.set_sysclk = at91_ssc_set_dai_sysclk,
.set_fmt = at91_ssc_set_dai_fmt,
.set_clkdiv = at91_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[2].ssc,
},
#endif
};
EXPORT_SYMBOL_GPL(at91_ssc_dai);
/* Module information */
MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
MODULE_DESCRIPTION("AT91 SSC ASoC Interface");
MODULE_LICENSE("GPL");

27
sound/soc/at91/at91-ssc.h
View File

@ -1,27 +0,0 @@
/*
* at91-ssc.h - ALSA SSC interface for the Atmel AT91 SoC
*
* Author: Frank Mandarino <fmandarino@endrelia.com>
* Endrelia Technologies Inc.
* Created: Jan 9, 2007
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _AT91_SSC_H
#define _AT91_SSC_H
/* SSC system clock ids */
#define AT91_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */
/* SSC divider ids */
#define AT91SSC_CMR_DIV 0 /* MCK divider for BCLK */
#define AT91SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */
#define AT91SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */
extern struct snd_soc_dai at91_ssc_dai[];
#endif /* _AT91_SSC_H */

43
sound/soc/atmel/Kconfig Normal file
View File

@ -0,0 +1,43 @@
config SND_ATMEL_SOC
tristate "SoC Audio for the Atmel System-on-Chip"
depends on ARCH_AT91 || AVR32
help
Say Y or M if you want to add support for codecs attached to
the ATMEL SSC interface. You will also need
to select the audio interfaces to support below.
config SND_ATMEL_SOC_SSC
tristate
depends on SND_ATMEL_SOC
help
Say Y or M if you want to add support for codecs the
ATMEL SSC interface. You will also needs to select the individual
machine drivers to support below.
config SND_AT91_SOC_SAM9G20_WM8731
tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
depends on ATMEL_SSC && ARCH_AT91SAM9G20 && SND_ATMEL_SOC
select SND_ATMEL_SOC_SSC
select SND_SOC_WM8731
help
Say Y if you want to add support for SoC audio on WM8731-based
AT91sam9g20 evaluation board.
config SND_AT32_SOC_PLAYPAQ
tristate "SoC Audio support for PlayPaq with WM8510"
depends on SND_ATMEL_SOC && BOARD_PLAYPAQ
select SND_ATMEL_SOC_SSC
select SND_SOC_WM8510
help
Say Y or M here if you want to add support for SoC audio
on the LRS PlayPaq.
config SND_AT32_SOC_PLAYPAQ_SLAVE
bool "Run CODEC on PlayPaq in slave mode"
depends on SND_AT32_SOC_PLAYPAQ
default n
help
Say Y if you want to run with the AT32 SSC generating the BCLK
and FRAME signals on the PlayPaq. Unless you want to play
with the AT32 as the SSC master, you probably want to say N here,
as this will give you better sound quality.

15
sound/soc/atmel/Makefile Normal file
View File

@ -0,0 +1,15 @@
# AT91 Platform Support
snd-soc-atmel-pcm-objs := atmel-pcm.o
snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
obj-$(CONFIG_SND_ATMEL_SOC) += snd-soc-atmel-pcm.o
obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
# AT91 Machine Support
snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o
# AT32 Machine Support
snd-soc-playpaq-objs := playpaq_wm8510.o
obj-$(CONFIG_SND_AT91_SOC_SAM9G20_WM8731) += snd-soc-sam9g20-wm8731.o
obj-$(CONFIG_SND_AT32_SOC_PLAYPAQ) += snd-soc-playpaq.o

370
sound/soc/at32/at32-pcm.c → sound/soc/atmel/atmel-pcm.c
View File

@ -1,15 +1,34 @@
/* sound/soc/at32/at32-pcm.c
* ASoC PCM interface for Atmel AT32 SoC
/*
* atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC.
*
* Copyright (C) 2008 Long Range Systems
* Geoffrey Wossum <gwossum@acm.org>
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
*
* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
*
* Based on at91-pcm. by:
* Frank Mandarino <fmandarino@endrelia.com>
* Copyright 2006 Endrelia Technologies Inc.
*
* Based on pxa2xx-pcm.c by:
*
* Author: Nicolas Pitre
* Created: Nov 30, 2004
* Copyright: (C) 2004 MontaVista Software, Inc.
*
* 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.
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Note that this is basically a port of the sound/soc/at91-pcm.c to
* the AVR32 kernel. Thanks to Frank Mandarino for that code.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
@ -18,14 +37,16 @@
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel-ssc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "at32-pcm.h"
#include <mach/hardware.h>
#include "atmel-pcm.h"
/*--------------------------------------------------------------------------*\
@ -34,36 +55,33 @@
/* TODO: These values were taken from the AT91 platform driver, check
* them against real values for AT32
*/
static const struct snd_pcm_hardware at32_pcm_hardware = {
.info = (SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_PAUSE),
.formats = SNDRV_PCM_FMTBIT_S16,
.period_bytes_min = 32,
.period_bytes_max = 8192, /* 512 frames * 16 bytes / frame */
.periods_min = 2,
.periods_max = 1024,
.buffer_bytes_max = 32 * 1024,
static const struct snd_pcm_hardware atmel_pcm_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_PAUSE,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.period_bytes_min = 32,
.period_bytes_max = 8192,
.periods_min = 2,
.periods_max = 1024,
.buffer_bytes_max = 32 * 1024,
};
/*--------------------------------------------------------------------------*\
* Data types
\*--------------------------------------------------------------------------*/
struct at32_runtime_data {
struct at32_pcm_dma_params *params;
dma_addr_t dma_buffer; /* physical address of DMA buffer */
dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
struct atmel_runtime_data {
struct atmel_pcm_dma_params *params;
dma_addr_t dma_buffer; /* physical address of dma buffer */
dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
size_t period_size;
dma_addr_t period_ptr; /* physical address of next period */
int periods; /* period index of period_ptr */
dma_addr_t period_ptr; /* physical address of next period */
int periods; /* period index of period_ptr */
/* Save PDC registers (for power management) */
/* PDC register save */
u32 pdc_xpr_save;
u32 pdc_xcr_save;
u32 pdc_xnpr_save;
@ -71,49 +89,51 @@ struct at32_runtime_data {
};
/*--------------------------------------------------------------------------*\
* Helper functions
\*--------------------------------------------------------------------------*/
static int at32_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
int stream)
{
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
struct snd_dma_buffer *dmabuf = &substream->dma_buffer;
size_t size = at32_pcm_hardware.buffer_bytes_max;
struct snd_dma_buffer *buf = &substream->dma_buffer;
size_t size = atmel_pcm_hardware.buffer_bytes_max;
dmabuf->dev.type = SNDRV_DMA_TYPE_DEV;
dmabuf->dev.dev = pcm->card->dev;
dmabuf->private_data = NULL;
dmabuf->area = dma_alloc_coherent(pcm->card->dev, size,
&dmabuf->addr, GFP_KERNEL);
pr_debug("at32_pcm: preallocate_dma_buffer: "
"area=%p, addr=%p, size=%ld\n",
(void *)dmabuf->area, (void *)dmabuf->addr, size);
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = pcm->card->dev;
buf->private_data = NULL;
buf->area = dma_alloc_coherent(pcm->card->dev, size,
&buf->addr, GFP_KERNEL);
pr_debug("atmel-pcm:"
"preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
(void *) buf->area,
(void *) buf->addr,
size);
if (!dmabuf->area)
if (!buf->area)
return -ENOMEM;
dmabuf->bytes = size;
buf->bytes = size;
return 0;
}
/*--------------------------------------------------------------------------*\
* ISR
\*--------------------------------------------------------------------------*/
static void at32_pcm_dma_irq(u32 ssc_sr, struct snd_pcm_substream *substream)
static void atmel_pcm_dma_irq(u32 ssc_sr,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *rtd = substream->runtime;
struct at32_runtime_data *prtd = rtd->private_data;
struct at32_pcm_dma_params *params = prtd->params;
struct atmel_runtime_data *prtd = substream->runtime->private_data;
struct atmel_pcm_dma_params *params = prtd->params;
static int count;
count++;
if (ssc_sr & params->mask->ssc_endbuf) {
pr_warning("at32-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
"underrun" : "overrun", params->name, ssc_sr, count);
pr_warning("atmel-pcm: buffer %s on %s"
" (SSC_SR=%#x, count=%d)\n",
substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? "underrun" : "overrun",
params->name, ssc_sr, count);
/* re-start the PDC */
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
@ -122,7 +142,6 @@ static void at32_pcm_dma_irq(u32 ssc_sr, struct snd_pcm_substream *substream)
if (prtd->period_ptr >= prtd->dma_buffer_end)
prtd->period_ptr = prtd->dma_buffer;
ssc_writex(params->ssc->regs, params->pdc->xpr,
prtd->period_ptr);
ssc_writex(params->ssc->regs, params->pdc->xcr,
@ -131,60 +150,58 @@ static void at32_pcm_dma_irq(u32 ssc_sr, struct snd_pcm_substream *substream)
params->mask->pdc_enable);
}
if (ssc_sr & params->mask->ssc_endx) {
/* Load the PDC next pointer and counter registers */
prtd->period_ptr += prtd->period_size;
if (prtd->period_ptr >= prtd->dma_buffer_end)
prtd->period_ptr = prtd->dma_buffer;
ssc_writex(params->ssc->regs, params->pdc->xnpr,
prtd->period_ptr);
ssc_writex(params->ssc->regs, params->pdc->xncr,
prtd->period_size / params->pdc_xfer_size);
}
snd_pcm_period_elapsed(substream);
}
/*--------------------------------------------------------------------------*\
* PCM operations
\*--------------------------------------------------------------------------*/
static int at32_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at32_runtime_data *prtd = runtime->private_data;
struct atmel_runtime_data *prtd = runtime->private_data;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
/* this may get called several times by oss emulation
* with different params
*/
* with different params */
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = params_buffer_bytes(params);
prtd->params = rtd->dai->cpu_dai->dma_data;
prtd->params->dma_intr_handler = at32_pcm_dma_irq;
prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
prtd->dma_buffer = runtime->dma_addr;
prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
prtd->period_size = params_period_bytes(params);
pr_debug("hw_params: DMA for %s initialized "
"(dma_bytes=%ld, period_size=%ld)\n",
prtd->params->name, runtime->dma_bytes, prtd->period_size);
pr_debug("atmel-pcm: "
"hw_params: DMA for %s initialized "
"(dma_bytes=%u, period_size=%u)\n",
prtd->params->name,
runtime->dma_bytes,
prtd->period_size);
return 0;
}
static int at32_pcm_hw_free(struct snd_pcm_substream *substream)
static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct at32_runtime_data *prtd = substream->runtime->private_data;
struct at32_pcm_dma_params *params = prtd->params;
struct atmel_runtime_data *prtd = substream->runtime->private_data;
struct atmel_pcm_dma_params *params = prtd->params;
if (params != NULL) {
ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
@ -195,32 +212,29 @@ static int at32_pcm_hw_free(struct snd_pcm_substream *substream)
return 0;
}
static int at32_pcm_prepare(struct snd_pcm_substream *substream)
static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
{
struct at32_runtime_data *prtd = substream->runtime->private_data;
struct at32_pcm_dma_params *params = prtd->params;
struct atmel_runtime_data *prtd = substream->runtime->private_data;
struct atmel_pcm_dma_params *params = prtd->params;
ssc_writex(params->ssc->regs, SSC_IDR,
params->mask->ssc_endx | params->mask->ssc_endbuf);
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
params->mask->pdc_disable);
return 0;
}
static int at32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct snd_pcm_runtime *rtd = substream->runtime;
struct at32_runtime_data *prtd = rtd->private_data;
struct at32_pcm_dma_params *params = prtd->params;
struct atmel_runtime_data *prtd = rtd->private_data;
struct atmel_pcm_dma_params *params = prtd->params;
int ret = 0;
pr_debug("at32_pcm_trigger: buffer_size = %ld, "
"dma_area = %p, dma_bytes = %ld\n",
rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
pr_debug("atmel-pcm:buffer_size = %ld,"
"dma_area = %p, dma_bytes = %u\n",
rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
@ -237,26 +251,25 @@ static int at32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
ssc_writex(params->ssc->regs, params->pdc->xncr,
prtd->period_size / params->pdc_xfer_size);
pr_debug("trigger: period_ptr=%lx, xpr=%x, "
"xcr=%d, xnpr=%x, xncr=%d\n",
(unsigned long)prtd->period_ptr,
ssc_readx(params->ssc->regs, params->pdc->xpr),
ssc_readx(params->ssc->regs, params->pdc->xcr),
ssc_readx(params->ssc->regs, params->pdc->xnpr),
ssc_readx(params->ssc->regs, params->pdc->xncr));
pr_debug("atmel-pcm: trigger: "
"period_ptr=%lx, xpr=%u, "
"xcr=%u, xnpr=%u, xncr=%u\n",
(unsigned long)prtd->period_ptr,
ssc_readx(params->ssc->regs, params->pdc->xpr),
ssc_readx(params->ssc->regs, params->pdc->xcr),
ssc_readx(params->ssc->regs, params->pdc->xnpr),
ssc_readx(params->ssc->regs, params->pdc->xncr));
ssc_writex(params->ssc->regs, SSC_IER,
params->mask->ssc_endx | params->mask->ssc_endbuf);
ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
params->mask->pdc_enable);
pr_debug("sr=%x, imr=%x\n",
ssc_readx(params->ssc->regs, SSC_SR),
ssc_readx(params->ssc->regs, SSC_IER));
pr_debug("sr=%u imr=%u\n",
ssc_readx(params->ssc->regs, SSC_SR),
ssc_readx(params->ssc->regs, SSC_IER));
break; /* SNDRV_PCM_TRIGGER_START */
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@ -264,7 +277,6 @@ static int at32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
params->mask->pdc_disable);
break;
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
@ -278,13 +290,12 @@ static int at32_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
return ret;
}
static snd_pcm_uframes_t at32_pcm_pointer(struct snd_pcm_substream *substream)
static snd_pcm_uframes_t atmel_pcm_pointer(
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at32_runtime_data *prtd = runtime->private_data;
struct at32_pcm_dma_params *params = prtd->params;
struct atmel_runtime_data *prtd = runtime->private_data;
struct atmel_pcm_dma_params *params = prtd->params;
dma_addr_t ptr;
snd_pcm_uframes_t x;
@ -297,108 +308,95 @@ static snd_pcm_uframes_t at32_pcm_pointer(struct snd_pcm_substream *substream)
return x;
}
static int at32_pcm_open(struct snd_pcm_substream *substream)
static int atmel_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct at32_runtime_data *prtd;
struct atmel_runtime_data *prtd;
int ret = 0;
snd_soc_set_runtime_hwparams(substream, &at32_pcm_hardware);
snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
/* ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
goto out;
prtd = kzalloc(sizeof(*prtd), GFP_KERNEL);
prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
if (prtd == NULL) {
ret = -ENOMEM;
goto out;
}
runtime->private_data = prtd;
out:
out:
return ret;
}
static int at32_pcm_close(struct snd_pcm_substream *substream)
static int atmel_pcm_close(struct snd_pcm_substream *substream)
{
struct at32_runtime_data *prtd = substream->runtime->private_data;
struct atmel_runtime_data *prtd = substream->runtime->private_data;
kfree(prtd);
return 0;
}
static int at32_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
static int atmel_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
return remap_pfn_range(vma, vma->vm_start,
substream->dma_buffer.addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
substream->dma_buffer.addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
}
static struct snd_pcm_ops at32_pcm_ops = {
.open = at32_pcm_open,
.close = at32_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = at32_pcm_hw_params,
.hw_free = at32_pcm_hw_free,
.prepare = at32_pcm_prepare,
.trigger = at32_pcm_trigger,
.pointer = at32_pcm_pointer,
.mmap = at32_pcm_mmap,
struct snd_pcm_ops atmel_pcm_ops = {
.open = atmel_pcm_open,
.close = atmel_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = atmel_pcm_hw_params,
.hw_free = atmel_pcm_hw_free,
.prepare = atmel_pcm_prepare,
.trigger = atmel_pcm_trigger,
.pointer = atmel_pcm_pointer,
.mmap = atmel_pcm_mmap,
};
/*--------------------------------------------------------------------------*\
* ASoC platform driver
\*--------------------------------------------------------------------------*/
static u64 at32_pcm_dmamask = 0xffffffff;
static u64 atmel_pcm_dmamask = 0xffffffff;
static int at32_pcm_new(struct snd_card *card,
struct snd_soc_dai *dai,
struct snd_pcm *pcm)
static int atmel_pcm_new(struct snd_card *card,
struct snd_soc_dai *dai, struct snd_pcm *pcm)
{
int ret = 0;
if (!card->dev->dma_mask)
card->dev->dma_mask = &at32_pcm_dmamask;
card->dev->dma_mask = &atmel_pcm_dmamask;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = 0xffffffff;
if (dai->playback.channels_min) {
ret = at32_pcm_preallocate_dma_buffer(
pcm, SNDRV_PCM_STREAM_PLAYBACK);
ret = atmel_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret)
goto out;
}
if (dai->capture.channels_min) {
pr_debug("at32-pcm: Allocating PCM capture DMA buffer\n");
ret = at32_pcm_preallocate_dma_buffer(
pcm, SNDRV_PCM_STREAM_CAPTURE);
pr_debug("at32-pcm:"
"Allocating PCM capture DMA buffer\n");
ret = atmel_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
if (ret)
goto out;
}
out:
out:
return ret;
}
static void at32_pcm_free_dma_buffers(struct snd_pcm *pcm)
static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
struct snd_pcm_substream *substream;
struct snd_dma_buffer *buf;
@ -406,7 +404,7 @@ static void at32_pcm_free_dma_buffers(struct snd_pcm *pcm)
for (stream = 0; stream < 2; stream++) {
substream = pcm->streams[stream].substream;
if (substream == NULL)
if (!substream)
continue;
buf = &substream->dma_buffer;
@ -418,24 +416,23 @@ static void at32_pcm_free_dma_buffers(struct snd_pcm *pcm)
}
}
#ifdef CONFIG_PM
static int at32_pcm_suspend(struct platform_device *pdev,
struct snd_soc_dai *dai)
static int atmel_pcm_suspend(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = dai->runtime;
struct at32_runtime_data *prtd;
struct at32_pcm_dma_params *params;
struct atmel_runtime_data *prtd;
struct atmel_pcm_dma_params *params;
if (runtime == NULL)
if (!runtime)
return 0;
prtd = runtime->private_data;
params = prtd->params;
/* Disable the PDC and save the PDC registers */
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
params->mask->pdc_disable);
/* disable the PDC and save the PDC registers */
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
@ -445,48 +442,43 @@ static int at32_pcm_suspend(struct platform_device *pdev,
return 0;
}
static int at32_pcm_resume(struct platform_device *pdev,
struct snd_soc_dai *dai)
static int atmel_pcm_resume(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
struct snd_pcm_runtime *runtime = dai->runtime;
struct at32_runtime_data *prtd;
struct at32_pcm_dma_params *params;
struct atmel_runtime_data *prtd;
struct atmel_pcm_dma_params *params;
if (runtime == NULL)
if (!runtime)
return 0;
prtd = runtime->private_data;
params = prtd->params;
/* Restore the PDC registers and enable the PDC */
/* restore the PDC registers and enable the PDC */
ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, params->mask->pdc_enable);
ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
return 0;
}
#else /* CONFIG_PM */
# define at32_pcm_suspend NULL
# define at32_pcm_resume NULL
#endif /* CONFIG_PM */
#else
#define atmel_pcm_suspend NULL
#define atmel_pcm_resume NULL
#endif
struct snd_soc_platform at32_soc_platform = {
.name = "at32-audio",
.pcm_ops = &at32_pcm_ops,
.pcm_new = at32_pcm_new,
.pcm_free = at32_pcm_free_dma_buffers,
.suspend = at32_pcm_suspend,
.resume = at32_pcm_resume,
struct snd_soc_platform atmel_soc_platform = {
.name = "atmel-audio",
.pcm_ops = &atmel_pcm_ops,
.pcm_new = atmel_pcm_new,
.pcm_free = atmel_pcm_free_dma_buffers,
.suspend = atmel_pcm_suspend,
.resume = atmel_pcm_resume,
};
EXPORT_SYMBOL_GPL(at32_soc_platform);
EXPORT_SYMBOL_GPL(atmel_soc_platform);
MODULE_AUTHOR("Geoffrey Wossum <gwossum@acm.org>");
MODULE_DESCRIPTION("Atmel AT32 PCM module");
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
MODULE_DESCRIPTION("Atmel PCM module");
MODULE_LICENSE("GPL");

86
sound/soc/atmel/atmel-pcm.h Normal file
View File

@ -0,0 +1,86 @@
/*
* at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC.
*
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
*
* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
*
* Based on at91-pcm. by:
* Frank Mandarino <fmandarino@endrelia.com>
* Copyright 2006 Endrelia Technologies Inc.
*
* Based on pxa2xx-pcm.c by:
*
* Author: Nicolas Pitre
* Created: Nov 30, 2004
* Copyright: (C) 2004 MontaVista Software, Inc.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _ATMEL_PCM_H
#define _ATMEL_PCM_H
#include <linux/atmel-ssc.h>
/*
* Registers and status bits that are required by the PCM driver.
*/
struct atmel_pdc_regs {
unsigned int xpr; /* PDC recv/trans pointer */
unsigned int xcr; /* PDC recv/trans counter */
unsigned int xnpr; /* PDC next recv/trans pointer */
unsigned int xncr; /* PDC next recv/trans counter */
unsigned int ptcr; /* PDC transfer control */
};
struct atmel_ssc_mask {
u32 ssc_enable; /* SSC recv/trans enable */
u32 ssc_disable; /* SSC recv/trans disable */
u32 ssc_endx; /* SSC ENDTX or ENDRX */
u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
u32 pdc_enable; /* PDC recv/trans enable */
u32 pdc_disable; /* PDC recv/trans disable */
};
/*
* This structure, shared between the PCM driver and the interface,
* contains all information required by the PCM driver to perform the
* PDC DMA operation. All fields except dma_intr_handler() are initialized
* by the interface. The dms_intr_handler() pointer is set by the PCM
* driver and called by the interface SSC interrupt handler if it is
* non-NULL.
*/
struct atmel_pcm_dma_params {
char *name; /* stream identifier */
int pdc_xfer_size; /* PDC counter increment in bytes */
struct ssc_device *ssc; /* SSC device for stream */
struct atmel_pdc_regs *pdc; /* PDC receive or transmit registers */
struct atmel_ssc_mask *mask; /* SSC & PDC status bits */
struct snd_pcm_substream *substream;
void (*dma_intr_handler)(u32, struct snd_pcm_substream *);
};
extern struct snd_soc_platform atmel_soc_platform;
/*
* SSC register access (since ssc_writel() / ssc_readl() require literal name)
*/
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
#endif /* _ATMEL_PCM_H */

782
sound/soc/atmel/atmel_ssc_dai.c Normal file
View File

@ -0,0 +1,782 @@
/*
* atmel_ssc_dai.c -- ALSA SoC ATMEL SSC Audio Layer Platform driver
*
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
*
* Author: Sedji Gaouaou <sedji.gaouaou@atmel.com>
* ATMEL CORP.
*
* Based on at91-ssc.c by
* Frank Mandarino <fmandarino@endrelia.com>
* Based on pxa2xx Platform drivers by
* Liam Girdwood <liam.girdwood@wolfsonmicro.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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/atmel_pdc.h>
#include <linux/atmel-ssc.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <mach/hardware.h>
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"
#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
#define NUM_SSC_DEVICES 1
#else
#define NUM_SSC_DEVICES 3
#endif
/*
* SSC PDC registers required by the PCM DMA engine.
*/
static struct atmel_pdc_regs pdc_tx_reg = {
.xpr = ATMEL_PDC_TPR,
.xcr = ATMEL_PDC_TCR,
.xnpr = ATMEL_PDC_TNPR,
.xncr = ATMEL_PDC_TNCR,
};
static struct atmel_pdc_regs pdc_rx_reg = {
.xpr = ATMEL_PDC_RPR,
.xcr = ATMEL_PDC_RCR,
.xnpr = ATMEL_PDC_RNPR,
.xncr = ATMEL_PDC_RNCR,
};
/*
* SSC & PDC status bits for transmit and receive.
*/
static struct atmel_ssc_mask ssc_tx_mask = {
.ssc_enable = SSC_BIT(CR_TXEN),
.ssc_disable = SSC_BIT(CR_TXDIS),
.ssc_endx = SSC_BIT(SR_ENDTX),
.ssc_endbuf = SSC_BIT(SR_TXBUFE),
.pdc_enable = ATMEL_PDC_TXTEN,
.pdc_disable = ATMEL_PDC_TXTDIS,
};
static struct atmel_ssc_mask ssc_rx_mask = {
.ssc_enable = SSC_BIT(CR_RXEN),
.ssc_disable = SSC_BIT(CR_RXDIS),
.ssc_endx = SSC_BIT(SR_ENDRX),
.ssc_endbuf = SSC_BIT(SR_RXBUFF),
.pdc_enable = ATMEL_PDC_RXTEN,
.pdc_disable = ATMEL_PDC_RXTDIS,
};
/*
* DMA parameters.
*/
static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
{{
.name = "SSC0 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC0 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
} },
#if NUM_SSC_DEVICES == 3
{{
.name = "SSC1 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC1 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
} },
{{
.name = "SSC2 PCM out",
.pdc = &pdc_tx_reg,
.mask = &ssc_tx_mask,
},
{
.name = "SSC2 PCM in",
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
} },
#endif
};
static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
{
.name = "ssc0",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[0].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
#if NUM_SSC_DEVICES == 3
{
.name = "ssc1",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
{
.name = "ssc2",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[2].lock),
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
#endif
};
/*
* SSC interrupt handler. Passes PDC interrupts to the DMA
* interrupt handler in the PCM driver.
*/
static irqreturn_t atmel_ssc_interrupt(int irq, void *dev_id)
{
struct atmel_ssc_info *ssc_p = dev_id;
struct atmel_pcm_dma_params *dma_params;
u32 ssc_sr;
u32 ssc_substream_mask;
int i;
ssc_sr = (unsigned long)ssc_readl(ssc_p->ssc->regs, SR)
& (unsigned long)ssc_readl(ssc_p->ssc->regs, IMR);
/*
* Loop through the substreams attached to this SSC. If
* a DMA-related interrupt occurred on that substream, call
* the DMA interrupt handler function, if one has been
* registered in the dma_params structure by the PCM driver.
*/
for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
dma_params = ssc_p->dma_params[i];
if ((dma_params != NULL) &&
(dma_params->dma_intr_handler != NULL)) {
ssc_substream_mask = (dma_params->mask->ssc_endx |
dma_params->mask->ssc_endbuf);
if (ssc_sr & ssc_substream_mask) {
dma_params->dma_intr_handler(ssc_sr,
dma_params->
substream);
}
}
}
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*\
* DAI functions
\*-------------------------------------------------------------------------*/
/*
* Startup. Only that one substream allowed in each direction.
*/
static int atmel_ssc_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
int dir_mask;
pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n",
ssc_readl(ssc_p->ssc->regs, SR));
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dir_mask = SSC_DIR_MASK_PLAYBACK;
else
dir_mask = SSC_DIR_MASK_CAPTURE;
spin_lock_irq(&ssc_p->lock);
if (ssc_p->dir_mask & dir_mask) {
spin_unlock_irq(&ssc_p->lock);
return -EBUSY;
}
ssc_p->dir_mask |= dir_mask;
spin_unlock_irq(&ssc_p->lock);
return 0;
}
/*
* Shutdown. Clear DMA parameters and shutdown the SSC if there
* are no other substreams open.
*/
static void atmel_ssc_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct atmel_pcm_dma_params *dma_params;
int dir, dir_mask;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dir = 0;
else
dir = 1;
dma_params = ssc_p->dma_params[dir];
if (dma_params != NULL) {
ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_disable);
pr_debug("atmel_ssc_shutdown: %s disabled SSC_SR=0x%08x\n",
(dir ? "receive" : "transmit"),
ssc_readl(ssc_p->ssc->regs, SR));
dma_params->ssc = NULL;
dma_params->substream = NULL;
ssc_p->dma_params[dir] = NULL;
}
dir_mask = 1 << dir;
spin_lock_irq(&ssc_p->lock);
ssc_p->dir_mask &= ~dir_mask;
if (!ssc_p->dir_mask) {
if (ssc_p->initialized) {
/* Shutdown the SSC clock. */
pr_debug("atmel_ssc_dau: Stopping clock\n");
clk_disable(ssc_p->ssc->clk);
free_irq(ssc_p->ssc->irq, ssc_p);
ssc_p->initialized = 0;
}
/* Reset the SSC */
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
/* Clear the SSC dividers */
ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
}
spin_unlock_irq(&ssc_p->lock);
}
/*
* Record the DAI format for use in hw_params().
*/
static int atmel_ssc_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct atmel_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
ssc_p->daifmt = fmt;
return 0;
}
/*
* Record SSC clock dividers for use in hw_params().
*/
static int atmel_ssc_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
struct atmel_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
switch (div_id) {
case ATMEL_SSC_CMR_DIV:
/*
* The same master clock divider is used for both
* transmit and receive, so if a value has already
* been set, it must match this value.
*/
if (ssc_p->cmr_div == 0)
ssc_p->cmr_div = div;
else
if (div != ssc_p->cmr_div)
return -EBUSY;
break;
case ATMEL_SSC_TCMR_PERIOD:
ssc_p->tcmr_period = div;
break;
case ATMEL_SSC_RCMR_PERIOD:
ssc_p->rcmr_period = div;
break;
default:
return -EINVAL;
}
return 0;
}
/*
* Configure the SSC.
*/
static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
int id = rtd->dai->cpu_dai->id;
struct atmel_ssc_info *ssc_p = &ssc_info[id];
struct atmel_pcm_dma_params *dma_params;
int dir, channels, bits;
u32 tfmr, rfmr, tcmr, rcmr;
int start_event;
int ret;
/*
* Currently, there is only one set of dma params for
* each direction. If more are added, this code will
* have to be changed to select the proper set.
*/
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dir = 0;
else
dir = 1;
dma_params = &ssc_dma_params[id][dir];
dma_params->ssc = ssc_p->ssc;
dma_params->substream = substream;
ssc_p->dma_params[dir] = dma_params;
/*
* The cpu_dai->dma_data field is only used to communicate the
* appropriate DMA parameters to the pcm driver hw_params()
* function. It should not be used for other purposes
* as it is common to all substreams.
*/
rtd->dai->cpu_dai->dma_data = dma_params;
channels = params_channels(params);
/*
* Determine sample size in bits and the PDC increment.
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
dma_params->pdc_xfer_size = 1;
break;
case SNDRV_PCM_FORMAT_S16_LE:
bits = 16;
dma_params->pdc_xfer_size = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
bits = 24;
dma_params->pdc_xfer_size = 4;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bits = 32;
dma_params->pdc_xfer_size = 4;
break;
default:
printk(KERN_WARNING "atmel_ssc_dai: unsupported PCM format");
return -EINVAL;
}
/*
* The SSC only supports up to 16-bit samples in I2S format, due
* to the size of the Frame Mode Register FSLEN field.
*/
if ((ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S
&& bits > 16) {
printk(KERN_WARNING
"atmel_ssc_dai: sample size %d"
"is too large for I2S\n", bits);
return -EINVAL;
}
/*
* Compute SSC register settings.
*/
switch (ssc_p->daifmt
& (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
/*
* I2S format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated
* from the MCK divider, and the BCLK signal
* is output on the SSC TK line.
*/
rcmr = SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period)
| SSC_BF(RCMR_STTDLY, START_DELAY)
| SSC_BF(RCMR_START, SSC_START_FALLING_RF)
| SSC_BF(RCMR_CKI, SSC_CKI_RISING)
| SSC_BF(RCMR_CKO, SSC_CKO_NONE)
| SSC_BF(RCMR_CKS, SSC_CKS_DIV);
rfmr = SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(RFMR_FSOS, SSC_FSOS_NEGATIVE)
| SSC_BF(RFMR_FSLEN, (bits - 1))
| SSC_BF(RFMR_DATNB, (channels - 1))
| SSC_BIT(RFMR_MSBF)
| SSC_BF(RFMR_LOOP, 0)
| SSC_BF(RFMR_DATLEN, (bits - 1));
tcmr = SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period)
| SSC_BF(TCMR_STTDLY, START_DELAY)
| SSC_BF(TCMR_START, SSC_START_FALLING_RF)
| SSC_BF(TCMR_CKI, SSC_CKI_FALLING)
| SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS)
| SSC_BF(TCMR_CKS, SSC_CKS_DIV);
tfmr = SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(TFMR_FSDEN, 0)
| SSC_BF(TFMR_FSOS, SSC_FSOS_NEGATIVE)
| SSC_BF(TFMR_FSLEN, (bits - 1))
| SSC_BF(TFMR_DATNB, (channels - 1))
| SSC_BIT(TFMR_MSBF)
| SSC_BF(TFMR_DATDEF, 0)
| SSC_BF(TFMR_DATLEN, (bits - 1));
break;
case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
/*
* I2S format, CODEC supplies BCLK and LRC clocks.
*
* The SSC transmit clock is obtained from the BCLK signal on
* on the TK line, and the SSC receive clock is
* generated from the transmit clock.
*
* For single channel data, one sample is transferred
* on the falling edge of the LRC clock.
* For two channel data, one sample is
* transferred on both edges of the LRC clock.
*/
start_event = ((channels == 1)
? SSC_START_FALLING_RF
: SSC_START_EDGE_RF);
rcmr = SSC_BF(RCMR_PERIOD, 0)
| SSC_BF(RCMR_STTDLY, START_DELAY)
| SSC_BF(RCMR_START, start_event)
| SSC_BF(RCMR_CKI, SSC_CKI_RISING)
| SSC_BF(RCMR_CKO, SSC_CKO_NONE)
| SSC_BF(RCMR_CKS, SSC_CKS_CLOCK);
rfmr = SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(RFMR_FSOS, SSC_FSOS_NONE)
| SSC_BF(RFMR_FSLEN, 0)
| SSC_BF(RFMR_DATNB, 0)
| SSC_BIT(RFMR_MSBF)
| SSC_BF(RFMR_LOOP, 0)
| SSC_BF(RFMR_DATLEN, (bits - 1));
tcmr = SSC_BF(TCMR_PERIOD, 0)
| SSC_BF(TCMR_STTDLY, START_DELAY)
| SSC_BF(TCMR_START, start_event)
| SSC_BF(TCMR_CKI, SSC_CKI_FALLING)
| SSC_BF(TCMR_CKO, SSC_CKO_NONE)
| SSC_BF(TCMR_CKS, SSC_CKS_PIN);
tfmr = SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(TFMR_FSDEN, 0)
| SSC_BF(TFMR_FSOS, SSC_FSOS_NONE)
| SSC_BF(TFMR_FSLEN, 0)
| SSC_BF(TFMR_DATNB, 0)
| SSC_BIT(TFMR_MSBF)
| SSC_BF(TFMR_DATDEF, 0)
| SSC_BF(TFMR_DATLEN, (bits - 1));
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
/*
* DSP/PCM Mode A format, SSC provides BCLK and LRC clocks.
*
* The SSC transmit and receive clocks are generated from the
* MCK divider, and the BCLK signal is output
* on the SSC TK line.
*/
rcmr = SSC_BF(RCMR_PERIOD, ssc_p->rcmr_period)
| SSC_BF(RCMR_STTDLY, 1)
| SSC_BF(RCMR_START, SSC_START_RISING_RF)
| SSC_BF(RCMR_CKI, SSC_CKI_RISING)
| SSC_BF(RCMR_CKO, SSC_CKO_NONE)
| SSC_BF(RCMR_CKS, SSC_CKS_DIV);
rfmr = SSC_BF(RFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(RFMR_FSOS, SSC_FSOS_POSITIVE)
| SSC_BF(RFMR_FSLEN, 0)
| SSC_BF(RFMR_DATNB, (channels - 1))
| SSC_BIT(RFMR_MSBF)
| SSC_BF(RFMR_LOOP, 0)
| SSC_BF(RFMR_DATLEN, (bits - 1));
tcmr = SSC_BF(TCMR_PERIOD, ssc_p->tcmr_period)
| SSC_BF(TCMR_STTDLY, 1)
| SSC_BF(TCMR_START, SSC_START_RISING_RF)
| SSC_BF(TCMR_CKI, SSC_CKI_RISING)
| SSC_BF(TCMR_CKO, SSC_CKO_CONTINUOUS)
| SSC_BF(TCMR_CKS, SSC_CKS_DIV);
tfmr = SSC_BF(TFMR_FSEDGE, SSC_FSEDGE_POSITIVE)
| SSC_BF(TFMR_FSDEN, 0)
| SSC_BF(TFMR_FSOS, SSC_FSOS_POSITIVE)
| SSC_BF(TFMR_FSLEN, 0)
| SSC_BF(TFMR_DATNB, (channels - 1))
| SSC_BIT(TFMR_MSBF)
| SSC_BF(TFMR_DATDEF, 0)
| SSC_BF(TFMR_DATLEN, (bits - 1));
break;
case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
default:
printk(KERN_WARNING "atmel_ssc_dai: unsupported DAI format 0x%x\n",
ssc_p->daifmt);
return -EINVAL;
break;
}
pr_debug("atmel_ssc_hw_params: "
"RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n",
rcmr, rfmr, tcmr, tfmr);
if (!ssc_p->initialized) {
/* Enable PMC peripheral clock for this SSC */
pr_debug("atmel_ssc_dai: Starting clock\n");
clk_enable(ssc_p->ssc->clk);
/* Reset the SSC and its PDC registers */
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_SWRST));
ssc_writel(ssc_p->ssc->regs, PDC_RPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RNPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_RNCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TCR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TNPR, 0);
ssc_writel(ssc_p->ssc->regs, PDC_TNCR, 0);
ret = request_irq(ssc_p->ssc->irq, atmel_ssc_interrupt, 0,
ssc_p->name, ssc_p);
if (ret < 0) {
printk(KERN_WARNING
"atmel_ssc_dai: request_irq failure\n");
pr_debug("Atmel_ssc_dai: Stoping clock\n");
clk_disable(ssc_p->ssc->clk);
return ret;
}
ssc_p->initialized = 1;
}
/* set SSC clock mode register */
ssc_writel(ssc_p->ssc->regs, CMR, ssc_p->cmr_div);
/* set receive clock mode and format */
ssc_writel(ssc_p->ssc->regs, RCMR, rcmr);
ssc_writel(ssc_p->ssc->regs, RFMR, rfmr);
/* set transmit clock mode and format */
ssc_writel(ssc_p->ssc->regs, TCMR, tcmr);
ssc_writel(ssc_p->ssc->regs, TFMR, tfmr);
pr_debug("atmel_ssc_dai,hw_params: SSC initialized\n");
return 0;
}
static int atmel_ssc_prepare(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
struct atmel_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
struct atmel_pcm_dma_params *dma_params;
int dir;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dir = 0;
else
dir = 1;
dma_params = ssc_p->dma_params[dir];
ssc_writel(ssc_p->ssc->regs, CR, dma_params->mask->ssc_enable);
pr_debug("%s enabled SSC_SR=0x%08x\n",
dir ? "receive" : "transmit",
ssc_readl(ssc_p->ssc->regs, SR));
return 0;
}
#ifdef CONFIG_PM
static int atmel_ssc_suspend(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct atmel_ssc_info *ssc_p;
if (!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
/* Save the status register before disabling transmit and receive */
ssc_p->ssc_state.ssc_sr = ssc_readl(ssc_p->ssc->regs, SR);
ssc_writel(ssc_p->ssc->regs, CR, SSC_BIT(CR_TXDIS) | SSC_BIT(CR_RXDIS));
/* Save the current interrupt mask, then disable unmasked interrupts */
ssc_p->ssc_state.ssc_imr = ssc_readl(ssc_p->ssc->regs, IMR);
ssc_writel(ssc_p->ssc->regs, IDR, ssc_p->ssc_state.ssc_imr);
ssc_p->ssc_state.ssc_cmr = ssc_readl(ssc_p->ssc->regs, CMR);
ssc_p->ssc_state.ssc_rcmr = ssc_readl(ssc_p->ssc->regs, RCMR);
ssc_p->ssc_state.ssc_rfmr = ssc_readl(ssc_p->ssc->regs, RFMR);
ssc_p->ssc_state.ssc_tcmr = ssc_readl(ssc_p->ssc->regs, TCMR);
ssc_p->ssc_state.ssc_tfmr = ssc_readl(ssc_p->ssc->regs, TFMR);
return 0;
}
static int atmel_ssc_resume(struct platform_device *pdev,
struct snd_soc_dai *cpu_dai)
{
struct atmel_ssc_info *ssc_p;
u32 cr;
if (!cpu_dai->active)
return 0;
ssc_p = &ssc_info[cpu_dai->id];
/* restore SSC register settings */
ssc_writel(ssc_p->ssc->regs, TFMR, ssc_p->ssc_state.ssc_tfmr);
ssc_writel(ssc_p->ssc->regs, TCMR, ssc_p->ssc_state.ssc_tcmr);
ssc_writel(ssc_p->ssc->regs, RFMR, ssc_p->ssc_state.ssc_rfmr);
ssc_writel(ssc_p->ssc->regs, RCMR, ssc_p->ssc_state.ssc_rcmr);
ssc_writel(ssc_p->ssc->regs, CMR, ssc_p->ssc_state.ssc_cmr);
/* re-enable interrupts */
ssc_writel(ssc_p->ssc->regs, IER, ssc_p->ssc_state.ssc_imr);
/* Re-enable recieve and transmit as appropriate */
cr = 0;
cr |=
(ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_RXEN)) ? SSC_BIT(CR_RXEN) : 0;
cr |=
(ssc_p->ssc_state.ssc_sr & SSC_BIT(SR_TXEN)) ? SSC_BIT(CR_TXEN) : 0;
ssc_writel(ssc_p->ssc->regs, CR, cr);
return 0;
}
#else /* CONFIG_PM */
# define atmel_ssc_suspend NULL
# define atmel_ssc_resume NULL
#endif /* CONFIG_PM */
#define ATMEL_SSC_RATES (SNDRV_PCM_RATE_8000_96000)
#define ATMEL_SSC_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
struct snd_soc_dai atmel_ssc_dai[NUM_SSC_DEVICES] = {
{ .name = "atmel-ssc0",
.id = 0,
.type = SND_SOC_DAI_PCM,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = {
.startup = atmel_ssc_startup,
.shutdown = atmel_ssc_shutdown,
.prepare = atmel_ssc_prepare,
.hw_params = atmel_ssc_hw_params,},
.dai_ops = {
.set_fmt = atmel_ssc_set_dai_fmt,
.set_clkdiv = atmel_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[0],
},
#if NUM_SSC_DEVICES == 3
{ .name = "atmel-ssc1",
.id = 1,
.type = SND_SOC_DAI_PCM,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = {
.startup = atmel_ssc_startup,
.shutdown = atmel_ssc_shutdown,
.prepare = atmel_ssc_prepare,
.hw_params = atmel_ssc_hw_params,},
.dai_ops = {
.set_fmt = atmel_ssc_set_dai_fmt,
.set_clkdiv = atmel_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[1],
},
{ .name = "atmel-ssc2",
.id = 2,
.type = SND_SOC_DAI_PCM,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = {
.startup = atmel_ssc_startup,
.shutdown = atmel_ssc_shutdown,
.prepare = atmel_ssc_prepare,
.hw_params = atmel_ssc_hw_params,},
.dai_ops = {
.set_fmt = atmel_ssc_set_dai_fmt,
.set_clkdiv = atmel_ssc_set_dai_clkdiv,},
.private_data = &ssc_info[2],
},
#endif
};
EXPORT_SYMBOL_GPL(atmel_ssc_dai);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou@atmel.com, www.atmel.com");
MODULE_DESCRIPTION("ATMEL SSC ASoC Interface");
MODULE_LICENSE("GPL");

121
sound/soc/atmel/atmel_ssc_dai.h Normal file
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/*
* atmel_ssc_dai.h - ALSA SSC interface for the Atmel SoC
*
* Copyright (C) 2005 SAN People
* Copyright (C) 2008 Atmel
*
* Author: Sedji Gaouaou <sedji.gaouaou@atmel.com>
* ATMEL CORP.
*
* Based on at91-ssc.c by
* Frank Mandarino <fmandarino@endrelia.com>
* Based on pxa2xx Platform drivers by
* Liam Girdwood <liam.girdwood@wolfsonmicro.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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _ATMEL_SSC_DAI_H
#define _ATMEL_SSC_DAI_H
#include <linux/types.h>
#include <linux/atmel-ssc.h>
#include "atmel-pcm.h"
/* SSC system clock ids */
#define ATMEL_SYSCLK_MCK 0 /* SSC uses AT91 MCK as system clock */
/* SSC divider ids */
#define ATMEL_SSC_CMR_DIV 0 /* MCK divider for BCLK */
#define ATMEL_SSC_TCMR_PERIOD 1 /* BCLK divider for transmit FS */
#define ATMEL_SSC_RCMR_PERIOD 2 /* BCLK divider for receive FS */
/*
* SSC direction masks
*/
#define SSC_DIR_MASK_UNUSED 0
#define SSC_DIR_MASK_PLAYBACK 1
#define SSC_DIR_MASK_CAPTURE 2
/*
* SSC register values that Atmel left out of <linux/atmel-ssc.h>. These
* are expected to be used with SSC_BF
*/
/* START bit field values */
#define SSC_START_CONTINUOUS 0
#define SSC_START_TX_RX 1
#define SSC_START_LOW_RF 2
#define SSC_START_HIGH_RF 3
#define SSC_START_FALLING_RF 4
#define SSC_START_RISING_RF 5
#define SSC_START_LEVEL_RF 6
#define SSC_START_EDGE_RF 7
#define SSS_START_COMPARE_0 8
/* CKI bit field values */
#define SSC_CKI_FALLING 0
#define SSC_CKI_RISING 1
/* CKO bit field values */
#define SSC_CKO_NONE 0
#define SSC_CKO_CONTINUOUS 1
#define SSC_CKO_TRANSFER 2
/* CKS bit field values */
#define SSC_CKS_DIV 0
#define SSC_CKS_CLOCK 1
#define SSC_CKS_PIN 2
/* FSEDGE bit field values */
#define SSC_FSEDGE_POSITIVE 0
#define SSC_FSEDGE_NEGATIVE 1
/* FSOS bit field values */
#define SSC_FSOS_NONE 0
#define SSC_FSOS_NEGATIVE 1
#define SSC_FSOS_POSITIVE 2
#define SSC_FSOS_LOW 3
#define SSC_FSOS_HIGH 4
#define SSC_FSOS_TOGGLE 5
#define START_DELAY 1
struct atmel_ssc_state {
u32 ssc_cmr;
u32 ssc_rcmr;
u32 ssc_rfmr;
u32 ssc_tcmr;
u32 ssc_tfmr;
u32 ssc_sr;
u32 ssc_imr;
};
struct atmel_ssc_info {
char *name;
struct ssc_device *ssc;
spinlock_t lock; /* lock for dir_mask */
unsigned short dir_mask; /* 0=unused, 1=playback, 2=capture */
unsigned short initialized; /* true if SSC has been initialized */
unsigned short daifmt;
unsigned short cmr_div;
unsigned short tcmr_period;
unsigned short rcmr_period;
struct atmel_pcm_dma_params *dma_params[2];
struct atmel_ssc_state ssc_state;
};
extern struct snd_soc_dai atmel_ssc_dai[];
#endif /* _AT91_SSC_DAI_H */

4
sound/soc/at32/playpaq_wm8510.c → sound/soc/atmel/playpaq_wm8510.c
View File

@ -40,8 +40,8 @@
#include <mach/portmux.h>
#include "../codecs/wm8510.h"
#include "at32-pcm.h"
#include "at32-ssc.h"
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"
/*-------------------------------------------------------------------------*\