Merge branch 'topic/atmel' into for-linus
This commit is contained in:
commit
158c1529fe
23
include/sound/atmel-abdac.h
Normal file
23
include/sound/atmel-abdac.h
Normal file
|
@ -0,0 +1,23 @@
|
|||
/*
|
||||
* Driver for the Atmel Audio Bitstream DAC (ABDAC)
|
||||
*
|
||||
* Copyright (C) 2009 Atmel Corporation
|
||||
*
|
||||
* 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 __INCLUDE_SOUND_ATMEL_ABDAC_H
|
||||
#define __INCLUDE_SOUND_ATMEL_ABDAC_H
|
||||
|
||||
#include <linux/dw_dmac.h>
|
||||
|
||||
/**
|
||||
* struct atmel_abdac_pdata - board specific ABDAC configuration
|
||||
* @dws: DMA slave interface to use for sound playback.
|
||||
*/
|
||||
struct atmel_abdac_pdata {
|
||||
struct dw_dma_slave dws;
|
||||
};
|
||||
|
||||
#endif /* __INCLUDE_SOUND_ATMEL_ABDAC_H */
|
40
include/sound/atmel-ac97c.h
Normal file
40
include/sound/atmel-ac97c.h
Normal file
|
@ -0,0 +1,40 @@
|
|||
/*
|
||||
* Driver for the Atmel AC97C controller
|
||||
*
|
||||
* Copyright (C) 2005-2009 Atmel Corporation
|
||||
*
|
||||
* 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 __INCLUDE_SOUND_ATMEL_AC97C_H
|
||||
#define __INCLUDE_SOUND_ATMEL_AC97C_H
|
||||
|
||||
#include <linux/dw_dmac.h>
|
||||
|
||||
#define AC97C_CAPTURE 0x01
|
||||
#define AC97C_PLAYBACK 0x02
|
||||
#define AC97C_BOTH (AC97C_CAPTURE | AC97C_PLAYBACK)
|
||||
|
||||
/**
|
||||
* struct atmel_ac97c_pdata - board specific AC97C configuration
|
||||
* @rx_dws: DMA slave interface to use for sound capture.
|
||||
* @tx_dws: DMA slave interface to use for sound playback.
|
||||
* @reset_pin: GPIO pin wired to the reset input on the external AC97 codec,
|
||||
* optional to use, set to -ENODEV if not in use. AC97 layer will
|
||||
* try to do a software reset of the external codec anyway.
|
||||
* @flags: Flags for which directions should be enabled.
|
||||
*
|
||||
* If the user do not want to use a DMA channel for playback or capture, i.e.
|
||||
* only one feature is required on the board. The slave for playback or capture
|
||||
* can be set to NULL. The AC97C driver will take use of this when setting up
|
||||
* the sound streams.
|
||||
*/
|
||||
struct ac97c_platform_data {
|
||||
struct dw_dma_slave rx_dws;
|
||||
struct dw_dma_slave tx_dws;
|
||||
unsigned int flags;
|
||||
int reset_pin;
|
||||
};
|
||||
|
||||
#endif /* __INCLUDE_SOUND_ATMEL_AC97C_H */
|
|
@ -60,6 +60,8 @@ source "sound/aoa/Kconfig"
|
|||
|
||||
source "sound/arm/Kconfig"
|
||||
|
||||
source "sound/atmel/Kconfig"
|
||||
|
||||
source "sound/spi/Kconfig"
|
||||
|
||||
source "sound/mips/Kconfig"
|
||||
|
|
|
@ -6,7 +6,7 @@ obj-$(CONFIG_SOUND_PRIME) += sound_firmware.o
|
|||
obj-$(CONFIG_SOUND_PRIME) += oss/
|
||||
obj-$(CONFIG_DMASOUND) += oss/
|
||||
obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \
|
||||
sparc/ spi/ parisc/ pcmcia/ mips/ soc/
|
||||
sparc/ spi/ parisc/ pcmcia/ mips/ soc/ atmel/
|
||||
obj-$(CONFIG_SND_AOA) += aoa/
|
||||
|
||||
# This one must be compilable even if sound is configured out
|
||||
|
|
19
sound/atmel/Kconfig
Normal file
19
sound/atmel/Kconfig
Normal file
|
@ -0,0 +1,19 @@
|
|||
menu "Atmel devices (AVR32 and AT91)"
|
||||
depends on AVR32 || ARCH_AT91
|
||||
|
||||
config SND_ATMEL_ABDAC
|
||||
tristate "Atmel Audio Bitstream DAC (ABDAC) driver"
|
||||
select SND_PCM
|
||||
depends on DW_DMAC && AVR32
|
||||
help
|
||||
ALSA sound driver for the Atmel Audio Bitstream DAC (ABDAC).
|
||||
|
||||
config SND_ATMEL_AC97C
|
||||
tristate "Atmel AC97 Controller (AC97C) driver"
|
||||
select SND_PCM
|
||||
select SND_AC97_CODEC
|
||||
depends on DW_DMAC && AVR32
|
||||
help
|
||||
ALSA sound driver for the Atmel AC97 controller.
|
||||
|
||||
endmenu
|
5
sound/atmel/Makefile
Normal file
5
sound/atmel/Makefile
Normal file
|
@ -0,0 +1,5 @@
|
|||
snd-atmel-abdac-objs := abdac.o
|
||||
snd-atmel-ac97c-objs := ac97c.o
|
||||
|
||||
obj-$(CONFIG_SND_ATMEL_ABDAC) += snd-atmel-abdac.o
|
||||
obj-$(CONFIG_SND_ATMEL_AC97C) += snd-atmel-ac97c.o
|
602
sound/atmel/abdac.c
Normal file
602
sound/atmel/abdac.c
Normal file
|
@ -0,0 +1,602 @@
|
|||
/*
|
||||
* Driver for the Atmel on-chip Audio Bitstream DAC (ABDAC)
|
||||
*
|
||||
* Copyright (C) 2006-2009 Atmel Corporation
|
||||
*
|
||||
* 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/clk.h>
|
||||
#include <linux/bitmap.h>
|
||||
#include <linux/dw_dmac.h>
|
||||
#include <linux/dmaengine.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <sound/core.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
#include <sound/atmel-abdac.h>
|
||||
|
||||
/* DAC register offsets */
|
||||
#define DAC_DATA 0x0000
|
||||
#define DAC_CTRL 0x0008
|
||||
#define DAC_INT_MASK 0x000c
|
||||
#define DAC_INT_EN 0x0010
|
||||
#define DAC_INT_DIS 0x0014
|
||||
#define DAC_INT_CLR 0x0018
|
||||
#define DAC_INT_STATUS 0x001c
|
||||
|
||||
/* Bitfields in CTRL */
|
||||
#define DAC_SWAP_OFFSET 30
|
||||
#define DAC_SWAP_SIZE 1
|
||||
#define DAC_EN_OFFSET 31
|
||||
#define DAC_EN_SIZE 1
|
||||
|
||||
/* Bitfields in INT_MASK/INT_EN/INT_DIS/INT_STATUS/INT_CLR */
|
||||
#define DAC_UNDERRUN_OFFSET 28
|
||||
#define DAC_UNDERRUN_SIZE 1
|
||||
#define DAC_TX_READY_OFFSET 29
|
||||
#define DAC_TX_READY_SIZE 1
|
||||
|
||||
/* Bit manipulation macros */
|
||||
#define DAC_BIT(name) \
|
||||
(1 << DAC_##name##_OFFSET)
|
||||
#define DAC_BF(name, value) \
|
||||
(((value) & ((1 << DAC_##name##_SIZE) - 1)) \
|
||||
<< DAC_##name##_OFFSET)
|
||||
#define DAC_BFEXT(name, value) \
|
||||
(((value) >> DAC_##name##_OFFSET) \
|
||||
& ((1 << DAC_##name##_SIZE) - 1))
|
||||
#define DAC_BFINS(name, value, old) \
|
||||
(((old) & ~(((1 << DAC_##name##_SIZE) - 1) \
|
||||
<< DAC_##name##_OFFSET)) \
|
||||
| DAC_BF(name, value))
|
||||
|
||||
/* Register access macros */
|
||||
#define dac_readl(port, reg) \
|
||||
__raw_readl((port)->regs + DAC_##reg)
|
||||
#define dac_writel(port, reg, value) \
|
||||
__raw_writel((value), (port)->regs + DAC_##reg)
|
||||
|
||||
/*
|
||||
* ABDAC supports a maximum of 6 different rates from a generic clock. The
|
||||
* generic clock has a power of two divider, which gives 6 steps from 192 kHz
|
||||
* to 5112 Hz.
|
||||
*/
|
||||
#define MAX_NUM_RATES 6
|
||||
/* ALSA seems to use rates between 192000 Hz and 5112 Hz. */
|
||||
#define RATE_MAX 192000
|
||||
#define RATE_MIN 5112
|
||||
|
||||
enum {
|
||||
DMA_READY = 0,
|
||||
};
|
||||
|
||||
struct atmel_abdac_dma {
|
||||
struct dma_chan *chan;
|
||||
struct dw_cyclic_desc *cdesc;
|
||||
};
|
||||
|
||||
struct atmel_abdac {
|
||||
struct clk *pclk;
|
||||
struct clk *sample_clk;
|
||||
struct platform_device *pdev;
|
||||
struct atmel_abdac_dma dma;
|
||||
|
||||
struct snd_pcm_hw_constraint_list constraints_rates;
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_card *card;
|
||||
struct snd_pcm *pcm;
|
||||
|
||||
void __iomem *regs;
|
||||
unsigned long flags;
|
||||
unsigned int rates[MAX_NUM_RATES];
|
||||
unsigned int rates_num;
|
||||
int irq;
|
||||
};
|
||||
|
||||
#define get_dac(card) ((struct atmel_abdac *)(card)->private_data)
|
||||
|
||||
/* This function is called by the DMA driver. */
|
||||
static void atmel_abdac_dma_period_done(void *arg)
|
||||
{
|
||||
struct atmel_abdac *dac = arg;
|
||||
snd_pcm_period_elapsed(dac->substream);
|
||||
}
|
||||
|
||||
static int atmel_abdac_prepare_dma(struct atmel_abdac *dac,
|
||||
struct snd_pcm_substream *substream,
|
||||
enum dma_data_direction direction)
|
||||
{
|
||||
struct dma_chan *chan = dac->dma.chan;
|
||||
struct dw_cyclic_desc *cdesc;
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
unsigned long buffer_len, period_len;
|
||||
|
||||
/*
|
||||
* We don't do DMA on "complex" transfers, i.e. with
|
||||
* non-halfword-aligned buffers or lengths.
|
||||
*/
|
||||
if (runtime->dma_addr & 1 || runtime->buffer_size & 1) {
|
||||
dev_dbg(&dac->pdev->dev, "too complex transfer\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
|
||||
period_len = frames_to_bytes(runtime, runtime->period_size);
|
||||
|
||||
cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len,
|
||||
period_len, DMA_TO_DEVICE);
|
||||
if (IS_ERR(cdesc)) {
|
||||
dev_dbg(&dac->pdev->dev, "could not prepare cyclic DMA\n");
|
||||
return PTR_ERR(cdesc);
|
||||
}
|
||||
|
||||
cdesc->period_callback = atmel_abdac_dma_period_done;
|
||||
cdesc->period_callback_param = dac;
|
||||
|
||||
dac->dma.cdesc = cdesc;
|
||||
|
||||
set_bit(DMA_READY, &dac->flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_pcm_hardware atmel_abdac_hw = {
|
||||
.info = (SNDRV_PCM_INFO_MMAP
|
||||
| SNDRV_PCM_INFO_MMAP_VALID
|
||||
| SNDRV_PCM_INFO_INTERLEAVED
|
||||
| SNDRV_PCM_INFO_BLOCK_TRANSFER
|
||||
| SNDRV_PCM_INFO_RESUME
|
||||
| SNDRV_PCM_INFO_PAUSE),
|
||||
.formats = (SNDRV_PCM_FMTBIT_S16_BE),
|
||||
.rates = (SNDRV_PCM_RATE_KNOT),
|
||||
.rate_min = RATE_MIN,
|
||||
.rate_max = RATE_MAX,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.buffer_bytes_max = 64 * 4096,
|
||||
.period_bytes_min = 4096,
|
||||
.period_bytes_max = 4096,
|
||||
.periods_min = 4,
|
||||
.periods_max = 64,
|
||||
};
|
||||
|
||||
static int atmel_abdac_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
|
||||
dac->substream = substream;
|
||||
atmel_abdac_hw.rate_max = dac->rates[dac->rates_num - 1];
|
||||
atmel_abdac_hw.rate_min = dac->rates[0];
|
||||
substream->runtime->hw = atmel_abdac_hw;
|
||||
|
||||
return snd_pcm_hw_constraint_list(substream->runtime, 0,
|
||||
SNDRV_PCM_HW_PARAM_RATE, &dac->constraints_rates);
|
||||
}
|
||||
|
||||
static int atmel_abdac_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
dac->substream = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_abdac_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
int retval;
|
||||
|
||||
retval = snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
|
||||
if (retval == 1)
|
||||
if (test_and_clear_bit(DMA_READY, &dac->flags))
|
||||
dw_dma_cyclic_free(dac->dma.chan);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int atmel_abdac_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
if (test_and_clear_bit(DMA_READY, &dac->flags))
|
||||
dw_dma_cyclic_free(dac->dma.chan);
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int atmel_abdac_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
int retval;
|
||||
|
||||
retval = clk_set_rate(dac->sample_clk, 256 * substream->runtime->rate);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
if (!test_bit(DMA_READY, &dac->flags))
|
||||
retval = atmel_abdac_prepare_dma(dac, substream, DMA_TO_DEVICE);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int atmel_abdac_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
int retval = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
clk_enable(dac->sample_clk);
|
||||
retval = dw_dma_cyclic_start(dac->dma.chan);
|
||||
if (retval)
|
||||
goto out;
|
||||
dac_writel(dac, CTRL, DAC_BIT(EN));
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
dw_dma_cyclic_stop(dac->dma.chan);
|
||||
dac_writel(dac, DATA, 0);
|
||||
dac_writel(dac, CTRL, 0);
|
||||
clk_disable(dac->sample_clk);
|
||||
break;
|
||||
default:
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
out:
|
||||
return retval;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t
|
||||
atmel_abdac_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_abdac *dac = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
snd_pcm_uframes_t frames;
|
||||
unsigned long bytes;
|
||||
|
||||
bytes = dw_dma_get_src_addr(dac->dma.chan);
|
||||
bytes -= runtime->dma_addr;
|
||||
|
||||
frames = bytes_to_frames(runtime, bytes);
|
||||
if (frames >= runtime->buffer_size)
|
||||
frames -= runtime->buffer_size;
|
||||
|
||||
return frames;
|
||||
}
|
||||
|
||||
static irqreturn_t abdac_interrupt(int irq, void *dev_id)
|
||||
{
|
||||
struct atmel_abdac *dac = dev_id;
|
||||
u32 status;
|
||||
|
||||
status = dac_readl(dac, INT_STATUS);
|
||||
if (status & DAC_BIT(UNDERRUN)) {
|
||||
dev_err(&dac->pdev->dev, "underrun detected\n");
|
||||
dac_writel(dac, INT_CLR, DAC_BIT(UNDERRUN));
|
||||
} else {
|
||||
dev_err(&dac->pdev->dev, "spurious interrupt (status=0x%x)\n",
|
||||
status);
|
||||
dac_writel(dac, INT_CLR, status);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static struct snd_pcm_ops atmel_abdac_ops = {
|
||||
.open = atmel_abdac_open,
|
||||
.close = atmel_abdac_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = atmel_abdac_hw_params,
|
||||
.hw_free = atmel_abdac_hw_free,
|
||||
.prepare = atmel_abdac_prepare,
|
||||
.trigger = atmel_abdac_trigger,
|
||||
.pointer = atmel_abdac_pointer,
|
||||
};
|
||||
|
||||
static int __devinit atmel_abdac_pcm_new(struct atmel_abdac *dac)
|
||||
{
|
||||
struct snd_pcm_hardware hw = atmel_abdac_hw;
|
||||
struct snd_pcm *pcm;
|
||||
int retval;
|
||||
|
||||
retval = snd_pcm_new(dac->card, dac->card->shortname,
|
||||
dac->pdev->id, 1, 0, &pcm);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
strcpy(pcm->name, dac->card->shortname);
|
||||
pcm->private_data = dac;
|
||||
pcm->info_flags = 0;
|
||||
dac->pcm = pcm;
|
||||
|
||||
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &atmel_abdac_ops);
|
||||
|
||||
retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
|
||||
&dac->pdev->dev, hw.periods_min * hw.period_bytes_min,
|
||||
hw.buffer_bytes_max);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static bool filter(struct dma_chan *chan, void *slave)
|
||||
{
|
||||
struct dw_dma_slave *dws = slave;
|
||||
|
||||
if (dws->dma_dev == chan->device->dev) {
|
||||
chan->private = dws;
|
||||
return true;
|
||||
} else
|
||||
return false;
|
||||
}
|
||||
|
||||
static int set_sample_rates(struct atmel_abdac *dac)
|
||||
{
|
||||
long new_rate = RATE_MAX;
|
||||
int retval = -EINVAL;
|
||||
int index = 0;
|
||||
|
||||
/* we start at 192 kHz and work our way down to 5112 Hz */
|
||||
while (new_rate >= RATE_MIN && index < (MAX_NUM_RATES + 1)) {
|
||||
new_rate = clk_round_rate(dac->sample_clk, 256 * new_rate);
|
||||
if (new_rate < 0)
|
||||
break;
|
||||
/* make sure we are below the ABDAC clock */
|
||||
if (new_rate <= clk_get_rate(dac->pclk)) {
|
||||
dac->rates[index] = new_rate / 256;
|
||||
index++;
|
||||
}
|
||||
/* divide by 256 and then by two to get next rate */
|
||||
new_rate /= 256 * 2;
|
||||
}
|
||||
|
||||
if (index) {
|
||||
int i;
|
||||
|
||||
/* reverse array, smallest go first */
|
||||
for (i = 0; i < (index / 2); i++) {
|
||||
unsigned int tmp = dac->rates[index - 1 - i];
|
||||
dac->rates[index - 1 - i] = dac->rates[i];
|
||||
dac->rates[i] = tmp;
|
||||
}
|
||||
|
||||
dac->constraints_rates.count = index;
|
||||
dac->constraints_rates.list = dac->rates;
|
||||
dac->constraints_rates.mask = 0;
|
||||
dac->rates_num = index;
|
||||
|
||||
retval = 0;
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int __devinit atmel_abdac_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card;
|
||||
struct atmel_abdac *dac;
|
||||
struct resource *regs;
|
||||
struct atmel_abdac_pdata *pdata;
|
||||
struct clk *pclk;
|
||||
struct clk *sample_clk;
|
||||
int retval;
|
||||
int irq;
|
||||
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!regs) {
|
||||
dev_dbg(&pdev->dev, "no memory resource\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
dev_dbg(&pdev->dev, "could not get IRQ number\n");
|
||||
return irq;
|
||||
}
|
||||
|
||||
pdata = pdev->dev.platform_data;
|
||||
if (!pdata) {
|
||||
dev_dbg(&pdev->dev, "no platform data\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
pclk = clk_get(&pdev->dev, "pclk");
|
||||
if (IS_ERR(pclk)) {
|
||||
dev_dbg(&pdev->dev, "no peripheral clock\n");
|
||||
return PTR_ERR(pclk);
|
||||
}
|
||||
sample_clk = clk_get(&pdev->dev, "sample_clk");
|
||||
if (IS_ERR(pclk)) {
|
||||
dev_dbg(&pdev->dev, "no sample clock\n");
|
||||
retval = PTR_ERR(pclk);
|
||||
goto out_put_pclk;
|
||||
}
|
||||
clk_enable(pclk);
|
||||
|
||||
retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
|
||||
THIS_MODULE, sizeof(struct atmel_abdac), &card);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not create sound card device\n");
|
||||
goto out_put_sample_clk;
|
||||
}
|
||||
|
||||
dac = get_dac(card);
|
||||
|
||||
dac->irq = irq;
|
||||
dac->card = card;
|
||||
dac->pclk = pclk;
|
||||
dac->sample_clk = sample_clk;
|
||||
dac->pdev = pdev;
|
||||
|
||||
retval = set_sample_rates(dac);
|
||||
if (retval < 0) {
|
||||
dev_dbg(&pdev->dev, "could not set supported rates\n");
|
||||
goto out_free_card;
|
||||
}
|
||||
|
||||
dac->regs = ioremap(regs->start, regs->end - regs->start + 1);
|
||||
if (!dac->regs) {
|
||||
dev_dbg(&pdev->dev, "could not remap register memory\n");
|
||||
goto out_free_card;
|
||||
}
|
||||
|
||||
/* make sure the DAC is silent and disabled */
|
||||
dac_writel(dac, DATA, 0);
|
||||
dac_writel(dac, CTRL, 0);
|
||||
|
||||
retval = request_irq(irq, abdac_interrupt, 0, "abdac", dac);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not request irq\n");
|
||||
goto out_unmap_regs;
|
||||
}
|
||||
|
||||
snd_card_set_dev(card, &pdev->dev);
|
||||
|
||||
if (pdata->dws.dma_dev) {
|
||||
struct dw_dma_slave *dws = &pdata->dws;
|
||||
dma_cap_mask_t mask;
|
||||
|
||||
dws->tx_reg = regs->start + DAC_DATA;
|
||||
|
||||
dma_cap_zero(mask);
|
||||
dma_cap_set(DMA_SLAVE, mask);
|
||||
|
||||
dac->dma.chan = dma_request_channel(mask, filter, dws);
|
||||
}
|
||||
if (!pdata->dws.dma_dev || !dac->dma.chan) {
|
||||
dev_dbg(&pdev->dev, "DMA not available\n");
|
||||
retval = -ENODEV;
|
||||
goto out_unset_card_dev;
|
||||
}
|
||||
|
||||
strcpy(card->driver, "Atmel ABDAC");
|
||||
strcpy(card->shortname, "Atmel ABDAC");
|
||||
sprintf(card->longname, "Atmel Audio Bitstream DAC");
|
||||
|
||||
retval = atmel_abdac_pcm_new(dac);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register ABDAC pcm device\n");
|
||||
goto out_release_dma;
|
||||
}
|
||||
|
||||
retval = snd_card_register(card);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register sound card\n");
|
||||
goto out_release_dma;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, card);
|
||||
|
||||
dev_info(&pdev->dev, "Atmel ABDAC at 0x%p using %s\n",
|
||||
dac->regs, dac->dma.chan->dev->device.bus_id);
|
||||
|
||||
return retval;
|
||||
|
||||
out_release_dma:
|
||||
dma_release_channel(dac->dma.chan);
|
||||
dac->dma.chan = NULL;
|
||||
out_unset_card_dev:
|
||||
snd_card_set_dev(card, NULL);
|
||||
free_irq(irq, dac);
|
||||
out_unmap_regs:
|
||||
iounmap(dac->regs);
|
||||
out_free_card:
|
||||
snd_card_free(card);
|
||||
out_put_sample_clk:
|
||||
clk_put(sample_clk);
|
||||
clk_disable(pclk);
|
||||
out_put_pclk:
|
||||
clk_put(pclk);
|
||||
return retval;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int atmel_abdac_suspend(struct platform_device *pdev, pm_message_t msg)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_abdac *dac = card->private_data;
|
||||
|
||||
dw_dma_cyclic_stop(dac->dma.chan);
|
||||
clk_disable(dac->sample_clk);
|
||||
clk_disable(dac->pclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_abdac_resume(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_abdac *dac = card->private_data;
|
||||
|
||||
clk_enable(dac->pclk);
|
||||
clk_enable(dac->sample_clk);
|
||||
if (test_bit(DMA_READY, &dac->flags))
|
||||
dw_dma_cyclic_start(dac->dma.chan);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define atmel_abdac_suspend NULL
|
||||
#define atmel_abdac_resume NULL
|
||||
#endif
|
||||
|
||||
static int __devexit atmel_abdac_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_abdac *dac = get_dac(card);
|
||||
|
||||
clk_put(dac->sample_clk);
|
||||
clk_disable(dac->pclk);
|
||||
clk_put(dac->pclk);
|
||||
|
||||
dma_release_channel(dac->dma.chan);
|
||||
dac->dma.chan = NULL;
|
||||
snd_card_set_dev(card, NULL);
|
||||
iounmap(dac->regs);
|
||||
free_irq(dac->irq, dac);
|
||||
snd_card_free(card);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver atmel_abdac_driver = {
|
||||
.remove = __devexit_p(atmel_abdac_remove),
|
||||
.driver = {
|
||||
.name = "atmel_abdac",
|
||||
},
|
||||
.suspend = atmel_abdac_suspend,
|
||||
.resume = atmel_abdac_resume,
|
||||
};
|
||||
|
||||
static int __init atmel_abdac_init(void)
|
||||
{
|
||||
return platform_driver_probe(&atmel_abdac_driver,
|
||||
atmel_abdac_probe);
|
||||
}
|
||||
module_init(atmel_abdac_init);
|
||||
|
||||
static void __exit atmel_abdac_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&atmel_abdac_driver);
|
||||
}
|
||||
module_exit(atmel_abdac_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Driver for Atmel Audio Bitstream DAC (ABDAC)");
|
||||
MODULE_AUTHOR("Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>");
|
932
sound/atmel/ac97c.c
Normal file
932
sound/atmel/ac97c.c
Normal file
|
@ -0,0 +1,932 @@
|
|||
/*
|
||||
* Driver for the Atmel AC97C controller
|
||||
*
|
||||
* Copyright (C) 2005-2009 Atmel Corporation
|
||||
*
|
||||
* 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/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/bitmap.h>
|
||||
#include <linux/dmaengine.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/gpio.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <sound/core.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
#include <sound/ac97_codec.h>
|
||||
#include <sound/atmel-ac97c.h>
|
||||
#include <sound/memalloc.h>
|
||||
|
||||
#include <linux/dw_dmac.h>
|
||||
|
||||
#include "ac97c.h"
|
||||
|
||||
enum {
|
||||
DMA_TX_READY = 0,
|
||||
DMA_RX_READY,
|
||||
DMA_TX_CHAN_PRESENT,
|
||||
DMA_RX_CHAN_PRESENT,
|
||||
};
|
||||
|
||||
/* Serialize access to opened variable */
|
||||
static DEFINE_MUTEX(opened_mutex);
|
||||
|
||||
struct atmel_ac97c_dma {
|
||||
struct dma_chan *rx_chan;
|
||||
struct dma_chan *tx_chan;
|
||||
};
|
||||
|
||||
struct atmel_ac97c {
|
||||
struct clk *pclk;
|
||||
struct platform_device *pdev;
|
||||
struct atmel_ac97c_dma dma;
|
||||
|
||||
struct snd_pcm_substream *playback_substream;
|
||||
struct snd_pcm_substream *capture_substream;
|
||||
struct snd_card *card;
|
||||
struct snd_pcm *pcm;
|
||||
struct snd_ac97 *ac97;
|
||||
struct snd_ac97_bus *ac97_bus;
|
||||
|
||||
u64 cur_format;
|
||||
unsigned int cur_rate;
|
||||
unsigned long flags;
|
||||
/* Serialize access to opened variable */
|
||||
spinlock_t lock;
|
||||
void __iomem *regs;
|
||||
int opened;
|
||||
int reset_pin;
|
||||
};
|
||||
|
||||
#define get_chip(card) ((struct atmel_ac97c *)(card)->private_data)
|
||||
|
||||
#define ac97c_writel(chip, reg, val) \
|
||||
__raw_writel((val), (chip)->regs + AC97C_##reg)
|
||||
#define ac97c_readl(chip, reg) \
|
||||
__raw_readl((chip)->regs + AC97C_##reg)
|
||||
|
||||
/* This function is called by the DMA driver. */
|
||||
static void atmel_ac97c_dma_playback_period_done(void *arg)
|
||||
{
|
||||
struct atmel_ac97c *chip = arg;
|
||||
snd_pcm_period_elapsed(chip->playback_substream);
|
||||
}
|
||||
|
||||
static void atmel_ac97c_dma_capture_period_done(void *arg)
|
||||
{
|
||||
struct atmel_ac97c *chip = arg;
|
||||
snd_pcm_period_elapsed(chip->capture_substream);
|
||||
}
|
||||
|
||||
static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
|
||||
struct snd_pcm_substream *substream,
|
||||
enum dma_data_direction direction)
|
||||
{
|
||||
struct dma_chan *chan;
|
||||
struct dw_cyclic_desc *cdesc;
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
unsigned long buffer_len, period_len;
|
||||
|
||||
/*
|
||||
* We don't do DMA on "complex" transfers, i.e. with
|
||||
* non-halfword-aligned buffers or lengths.
|
||||
*/
|
||||
if (runtime->dma_addr & 1 || runtime->buffer_size & 1) {
|
||||
dev_dbg(&chip->pdev->dev, "too complex transfer\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (direction == DMA_TO_DEVICE)
|
||||
chan = chip->dma.tx_chan;
|
||||
else
|
||||
chan = chip->dma.rx_chan;
|
||||
|
||||
buffer_len = frames_to_bytes(runtime, runtime->buffer_size);
|
||||
period_len = frames_to_bytes(runtime, runtime->period_size);
|
||||
|
||||
cdesc = dw_dma_cyclic_prep(chan, runtime->dma_addr, buffer_len,
|
||||
period_len, direction);
|
||||
if (IS_ERR(cdesc)) {
|
||||
dev_dbg(&chip->pdev->dev, "could not prepare cyclic DMA\n");
|
||||
return PTR_ERR(cdesc);
|
||||
}
|
||||
|
||||
if (direction == DMA_TO_DEVICE) {
|
||||
cdesc->period_callback = atmel_ac97c_dma_playback_period_done;
|
||||
set_bit(DMA_TX_READY, &chip->flags);
|
||||
} else {
|
||||
cdesc->period_callback = atmel_ac97c_dma_capture_period_done;
|
||||
set_bit(DMA_RX_READY, &chip->flags);
|
||||
}
|
||||
|
||||
cdesc->period_callback_param = chip;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct snd_pcm_hardware atmel_ac97c_hw = {
|
||||
.info = (SNDRV_PCM_INFO_MMAP
|
||||
| SNDRV_PCM_INFO_MMAP_VALID
|
||||
| SNDRV_PCM_INFO_INTERLEAVED
|
||||
| SNDRV_PCM_INFO_BLOCK_TRANSFER
|
||||
| SNDRV_PCM_INFO_JOINT_DUPLEX
|
||||
| SNDRV_PCM_INFO_RESUME
|
||||
| SNDRV_PCM_INFO_PAUSE),
|
||||
.formats = (SNDRV_PCM_FMTBIT_S16_BE
|
||||
| SNDRV_PCM_FMTBIT_S16_LE),
|
||||
.rates = (SNDRV_PCM_RATE_CONTINUOUS),
|
||||
.rate_min = 4000,
|
||||
.rate_max = 48000,
|
||||
.channels_min = 1,
|
||||
.channels_max = 2,
|
||||
.buffer_bytes_max = 64 * 4096,
|
||||
.period_bytes_min = 4096,
|
||||
.period_bytes_max = 4096,
|
||||
.periods_min = 4,
|
||||
.periods_max = 64,
|
||||
};
|
||||
|
||||
static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->opened++;
|
||||
runtime->hw = atmel_ac97c_hw;
|
||||
if (chip->cur_rate) {
|
||||
runtime->hw.rate_min = chip->cur_rate;
|
||||
runtime->hw.rate_max = chip->cur_rate;
|
||||
}
|
||||
if (chip->cur_format)
|
||||
runtime->hw.formats = (1ULL << chip->cur_format);
|
||||
mutex_unlock(&opened_mutex);
|
||||
chip->playback_substream = substream;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->opened++;
|
||||
runtime->hw = atmel_ac97c_hw;
|
||||
if (chip->cur_rate) {
|
||||
runtime->hw.rate_min = chip->cur_rate;
|
||||
runtime->hw.rate_max = chip->cur_rate;
|
||||
}
|
||||
if (chip->cur_format)
|
||||
runtime->hw.formats = (1ULL << chip->cur_format);
|
||||
mutex_unlock(&opened_mutex);
|
||||
chip->capture_substream = substream;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_playback_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->opened--;
|
||||
if (!chip->opened) {
|
||||
chip->cur_rate = 0;
|
||||
chip->cur_format = 0;
|
||||
}
|
||||
mutex_unlock(&opened_mutex);
|
||||
|
||||
chip->playback_substream = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_capture_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->opened--;
|
||||
if (!chip->opened) {
|
||||
chip->cur_rate = 0;
|
||||
chip->cur_format = 0;
|
||||
}
|
||||
mutex_unlock(&opened_mutex);
|
||||
|
||||
chip->capture_substream = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
int retval;
|
||||
|
||||
retval = snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
|
||||
if (retval == 1)
|
||||
if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
|
||||
dw_dma_cyclic_free(chip->dma.tx_chan);
|
||||
|
||||
/* Set restrictions to params. */
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->cur_rate = params_rate(hw_params);
|
||||
chip->cur_format = params_format(hw_params);
|
||||
mutex_unlock(&opened_mutex);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
int retval;
|
||||
|
||||
retval = snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
|
||||
if (retval == 1)
|
||||
if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
|
||||
dw_dma_cyclic_free(chip->dma.rx_chan);
|
||||
|
||||
/* Set restrictions to params. */
|
||||
mutex_lock(&opened_mutex);
|
||||
chip->cur_rate = params_rate(hw_params);
|
||||
chip->cur_format = params_format(hw_params);
|
||||
mutex_unlock(&opened_mutex);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
|
||||
dw_dma_cyclic_free(chip->dma.tx_chan);
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
|
||||
dw_dma_cyclic_free(chip->dma.rx_chan);
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
unsigned long word = 0;
|
||||
int retval;
|
||||
|
||||
/* assign channels to AC97C channel A */
|
||||
switch (runtime->channels) {
|
||||
case 1:
|
||||
word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
|
||||
break;
|
||||
case 2:
|
||||
word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
|
||||
| AC97C_CH_ASSIGN(PCM_RIGHT, A);
|
||||
break;
|
||||
default:
|
||||
/* TODO: support more than two channels */
|
||||
return -EINVAL;
|
||||
break;
|
||||
}
|
||||
ac97c_writel(chip, OCA, word);
|
||||
|
||||
/* configure sample format and size */
|
||||
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
|
||||
|
||||
switch (runtime->format) {
|
||||
case SNDRV_PCM_FORMAT_S16_LE:
|
||||
word |= AC97C_CMR_CEM_LITTLE;
|
||||
break;
|
||||
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
|
||||
default:
|
||||
word &= ~(AC97C_CMR_CEM_LITTLE);
|
||||
break;
|
||||
}
|
||||
|
||||
ac97c_writel(chip, CAMR, word);
|
||||
|
||||
/* set variable rate if needed */
|
||||
if (runtime->rate != 48000) {
|
||||
word = ac97c_readl(chip, MR);
|
||||
word |= AC97C_MR_VRA;
|
||||
ac97c_writel(chip, MR, word);
|
||||
} else {
|
||||
word = ac97c_readl(chip, MR);
|
||||
word &= ~(AC97C_MR_VRA);
|
||||
ac97c_writel(chip, MR, word);
|
||||
}
|
||||
|
||||
retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,
|
||||
runtime->rate);
|
||||
if (retval)
|
||||
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
|
||||
runtime->rate);
|
||||
|
||||
if (!test_bit(DMA_TX_READY, &chip->flags))
|
||||
retval = atmel_ac97c_prepare_dma(chip, substream,
|
||||
DMA_TO_DEVICE);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
unsigned long word = 0;
|
||||
int retval;
|
||||
|
||||
/* assign channels to AC97C channel A */
|
||||
switch (runtime->channels) {
|
||||
case 1:
|
||||
word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
|
||||
break;
|
||||
case 2:
|
||||
word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
|
||||
| AC97C_CH_ASSIGN(PCM_RIGHT, A);
|
||||
break;
|
||||
default:
|
||||
/* TODO: support more than two channels */
|
||||
return -EINVAL;
|
||||
break;
|
||||
}
|
||||
ac97c_writel(chip, ICA, word);
|
||||
|
||||
/* configure sample format and size */
|
||||
word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
|
||||
|
||||
switch (runtime->format) {
|
||||
case SNDRV_PCM_FORMAT_S16_LE:
|
||||
word |= AC97C_CMR_CEM_LITTLE;
|
||||
break;
|
||||
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
|
||||
default:
|
||||
word &= ~(AC97C_CMR_CEM_LITTLE);
|
||||
break;
|
||||
}
|
||||
|
||||
ac97c_writel(chip, CAMR, word);
|
||||
|
||||
/* set variable rate if needed */
|
||||
if (runtime->rate != 48000) {
|
||||
word = ac97c_readl(chip, MR);
|
||||
word |= AC97C_MR_VRA;
|
||||
ac97c_writel(chip, MR, word);
|
||||
} else {
|
||||
word = ac97c_readl(chip, MR);
|
||||
word &= ~(AC97C_MR_VRA);
|
||||
ac97c_writel(chip, MR, word);
|
||||
}
|
||||
|
||||
retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE,
|
||||
runtime->rate);
|
||||
if (retval)
|
||||
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
|
||||
runtime->rate);
|
||||
|
||||
if (!test_bit(DMA_RX_READY, &chip->flags))
|
||||
retval = atmel_ac97c_prepare_dma(chip, substream,
|
||||
DMA_FROM_DEVICE);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int
|
||||
atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
unsigned long camr;
|
||||
int retval = 0;
|
||||
|
||||
camr = ac97c_readl(chip, CAMR);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
retval = dw_dma_cyclic_start(chip->dma.tx_chan);
|
||||
if (retval)
|
||||
goto out;
|
||||
camr |= AC97C_CMR_CENA;
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
dw_dma_cyclic_stop(chip->dma.tx_chan);
|
||||
if (chip->opened <= 1)
|
||||
camr &= ~AC97C_CMR_CENA;
|
||||
break;
|
||||
default:
|
||||
retval = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ac97c_writel(chip, CAMR, camr);
|
||||
out:
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int
|
||||
atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
unsigned long camr;
|
||||
int retval = 0;
|
||||
|
||||
camr = ac97c_readl(chip, CAMR);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
retval = dw_dma_cyclic_start(chip->dma.rx_chan);
|
||||
if (retval)
|
||||
goto out;
|
||||
camr |= AC97C_CMR_CENA;
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
dw_dma_cyclic_stop(chip->dma.rx_chan);
|
||||
if (chip->opened <= 1)
|
||||
camr &= ~AC97C_CMR_CENA;
|
||||
break;
|
||||
default:
|
||||
retval = -EINVAL;
|
||||
break;
|
||||
}
|
||||
|
||||
ac97c_writel(chip, CAMR, camr);
|
||||
out:
|
||||
return retval;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t
|
||||
atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
snd_pcm_uframes_t frames;
|
||||
unsigned long bytes;
|
||||
|
||||
bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
|
||||
bytes -= runtime->dma_addr;
|
||||
|
||||
frames = bytes_to_frames(runtime, bytes);
|
||||
if (frames >= runtime->buffer_size)
|
||||
frames -= runtime->buffer_size;
|
||||
return frames;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t
|
||||
atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
snd_pcm_uframes_t frames;
|
||||
unsigned long bytes;
|
||||
|
||||
bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
|
||||
bytes -= runtime->dma_addr;
|
||||
|
||||
frames = bytes_to_frames(runtime, bytes);
|
||||
if (frames >= runtime->buffer_size)
|
||||
frames -= runtime->buffer_size;
|
||||
return frames;
|
||||
}
|
||||
|
||||
static struct snd_pcm_ops atmel_ac97_playback_ops = {
|
||||
.open = atmel_ac97c_playback_open,
|
||||
.close = atmel_ac97c_playback_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = atmel_ac97c_playback_hw_params,
|
||||
.hw_free = atmel_ac97c_playback_hw_free,
|
||||
.prepare = atmel_ac97c_playback_prepare,
|
||||
.trigger = atmel_ac97c_playback_trigger,
|
||||
.pointer = atmel_ac97c_playback_pointer,
|
||||
};
|
||||
|
||||
static struct snd_pcm_ops atmel_ac97_capture_ops = {
|
||||
.open = atmel_ac97c_capture_open,
|
||||
.close = atmel_ac97c_capture_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = atmel_ac97c_capture_hw_params,
|
||||
.hw_free = atmel_ac97c_capture_hw_free,
|
||||
.prepare = atmel_ac97c_capture_prepare,
|
||||
.trigger = atmel_ac97c_capture_trigger,
|
||||
.pointer = atmel_ac97c_capture_pointer,
|
||||
};
|
||||
|
||||
static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
|
||||
{
|
||||
struct snd_pcm *pcm;
|
||||
struct snd_pcm_hardware hw = atmel_ac97c_hw;
|
||||
int capture, playback, retval;
|
||||
|
||||
capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
|
||||
playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
|
||||
|
||||
retval = snd_pcm_new(chip->card, chip->card->shortname,
|
||||
chip->pdev->id, playback, capture, &pcm);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
if (capture)
|
||||
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
||||
&atmel_ac97_capture_ops);
|
||||
if (playback)
|
||||
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
||||
&atmel_ac97_playback_ops);
|
||||
|
||||
retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
|
||||
&chip->pdev->dev, hw.periods_min * hw.period_bytes_min,
|
||||
hw.buffer_bytes_max);
|
||||
if (retval)
|
||||
return retval;
|
||||
|
||||
pcm->private_data = chip;
|
||||
pcm->info_flags = 0;
|
||||
strcpy(pcm->name, chip->card->shortname);
|
||||
chip->pcm = pcm;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_mixer_new(struct atmel_ac97c *chip)
|
||||
{
|
||||
struct snd_ac97_template template;
|
||||
memset(&template, 0, sizeof(template));
|
||||
template.private_data = chip;
|
||||
return snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97);
|
||||
}
|
||||
|
||||
static void atmel_ac97c_write(struct snd_ac97 *ac97, unsigned short reg,
|
||||
unsigned short val)
|
||||
{
|
||||
struct atmel_ac97c *chip = get_chip(ac97);
|
||||
unsigned long word;
|
||||
int timeout = 40;
|
||||
|
||||
word = (reg & 0x7f) << 16 | val;
|
||||
|
||||
do {
|
||||
if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) {
|
||||
ac97c_writel(chip, COTHR, word);
|
||||
return;
|
||||
}
|
||||
udelay(1);
|
||||
} while (--timeout);
|
||||
|
||||
dev_dbg(&chip->pdev->dev, "codec write timeout\n");
|
||||
}
|
||||
|
||||
static unsigned short atmel_ac97c_read(struct snd_ac97 *ac97,
|
||||
unsigned short reg)
|
||||
{
|
||||
struct atmel_ac97c *chip = get_chip(ac97);
|
||||
unsigned long word;
|
||||
int timeout = 40;
|
||||
int write = 10;
|
||||
|
||||
word = (0x80 | (reg & 0x7f)) << 16;
|
||||
|
||||
if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0)
|
||||
ac97c_readl(chip, CORHR);
|
||||
|
||||
retry_write:
|
||||
timeout = 40;
|
||||
|
||||
do {
|
||||
if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) {
|
||||
ac97c_writel(chip, COTHR, word);
|
||||
goto read_reg;
|
||||
}
|
||||
udelay(10);
|
||||
} while (--timeout);
|
||||
|
||||
if (!--write)
|
||||
goto timed_out;
|
||||
goto retry_write;
|
||||
|
||||
read_reg:
|
||||
do {
|
||||
if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) {
|
||||
unsigned short val = ac97c_readl(chip, CORHR);
|
||||
return val;
|
||||
}
|
||||
udelay(10);
|
||||
} while (--timeout);
|
||||
|
||||
if (!--write)
|
||||
goto timed_out;
|
||||
goto retry_write;
|
||||
|
||||
timed_out:
|
||||
dev_dbg(&chip->pdev->dev, "codec read timeout\n");
|
||||
return 0xffff;
|
||||
}
|
||||
|
||||
static bool filter(struct dma_chan *chan, void *slave)
|
||||
{
|
||||
struct dw_dma_slave *dws = slave;
|
||||
|
||||
if (dws->dma_dev == chan->device->dev) {
|
||||
chan->private = dws;
|
||||
return true;
|
||||
} else
|
||||
return false;
|
||||
}
|
||||
|
||||
static void atmel_ac97c_reset(struct atmel_ac97c *chip)
|
||||
{
|
||||
ac97c_writel(chip, MR, AC97C_MR_WRST);
|
||||
|
||||
if (gpio_is_valid(chip->reset_pin)) {
|
||||
gpio_set_value(chip->reset_pin, 0);
|
||||
/* AC97 v2.2 specifications says minimum 1 us. */
|
||||
udelay(10);
|
||||
gpio_set_value(chip->reset_pin, 1);
|
||||
}
|
||||
|
||||
udelay(1);
|
||||
ac97c_writel(chip, MR, AC97C_MR_ENA);
|
||||
}
|
||||
|
||||
static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card;
|
||||
struct atmel_ac97c *chip;
|
||||
struct resource *regs;
|
||||
struct ac97c_platform_data *pdata;
|
||||
struct clk *pclk;
|
||||
static struct snd_ac97_bus_ops ops = {
|
||||
.write = atmel_ac97c_write,
|
||||
.read = atmel_ac97c_read,
|
||||
};
|
||||
int retval;
|
||||
|
||||
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!regs) {
|
||||
dev_dbg(&pdev->dev, "no memory resource\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
pdata = pdev->dev.platform_data;
|
||||
if (!pdata) {
|
||||
dev_dbg(&pdev->dev, "no platform data\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
|
||||
pclk = clk_get(&pdev->dev, "pclk");
|
||||
if (IS_ERR(pclk)) {
|
||||
dev_dbg(&pdev->dev, "no peripheral clock\n");
|
||||
return PTR_ERR(pclk);
|
||||
}
|
||||
clk_enable(pclk);
|
||||
|
||||
retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
|
||||
THIS_MODULE, sizeof(struct atmel_ac97c), &card);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not create sound card device\n");
|
||||
goto err_snd_card_new;
|
||||
}
|
||||
|
||||
chip = get_chip(card);
|
||||
|
||||
spin_lock_init(&chip->lock);
|
||||
|
||||
strcpy(card->driver, "Atmel AC97C");
|
||||
strcpy(card->shortname, "Atmel AC97C");
|
||||
sprintf(card->longname, "Atmel AC97 controller");
|
||||
|
||||
chip->card = card;
|
||||
chip->pclk = pclk;
|
||||
chip->pdev = pdev;
|
||||
chip->regs = ioremap(regs->start, regs->end - regs->start + 1);
|
||||
|
||||
if (!chip->regs) {
|
||||
dev_dbg(&pdev->dev, "could not remap register memory\n");
|
||||
goto err_ioremap;
|
||||
}
|
||||
|
||||
if (gpio_is_valid(pdata->reset_pin)) {
|
||||
if (gpio_request(pdata->reset_pin, "reset_pin")) {
|
||||
dev_dbg(&pdev->dev, "reset pin not available\n");
|
||||
chip->reset_pin = -ENODEV;
|
||||
} else {
|
||||
gpio_direction_output(pdata->reset_pin, 1);
|
||||
chip->reset_pin = pdata->reset_pin;
|
||||
}
|
||||
}
|
||||
|
||||
snd_card_set_dev(card, &pdev->dev);
|
||||
|
||||
retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register on ac97 bus\n");
|
||||
goto err_ac97_bus;
|
||||
}
|
||||
|
||||
atmel_ac97c_reset(chip);
|
||||
|
||||
retval = atmel_ac97c_mixer_new(chip);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register ac97 mixer\n");
|
||||
goto err_ac97_bus;
|
||||
}
|
||||
|
||||
if (pdata->rx_dws.dma_dev) {
|
||||
struct dw_dma_slave *dws = &pdata->rx_dws;
|
||||
dma_cap_mask_t mask;
|
||||
|
||||
dws->rx_reg = regs->start + AC97C_CARHR + 2;
|
||||
|
||||
dma_cap_zero(mask);
|
||||
dma_cap_set(DMA_SLAVE, mask);
|
||||
|
||||
chip->dma.rx_chan = dma_request_channel(mask, filter, dws);
|
||||
|
||||
dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
|
||||
chip->dma.rx_chan->dev->device.bus_id);
|
||||
set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
|
||||
}
|
||||
|
||||
if (pdata->tx_dws.dma_dev) {
|
||||
struct dw_dma_slave *dws = &pdata->tx_dws;
|
||||
dma_cap_mask_t mask;
|
||||
|
||||
dws->tx_reg = regs->start + AC97C_CATHR + 2;
|
||||
|
||||
dma_cap_zero(mask);
|
||||
dma_cap_set(DMA_SLAVE, mask);
|
||||
|
||||
chip->dma.tx_chan = dma_request_channel(mask, filter, dws);
|
||||
|
||||
dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
|
||||
chip->dma.tx_chan->dev->device.bus_id);
|
||||
set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
|
||||
}
|
||||
|
||||
if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
|
||||
!test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
|
||||
dev_dbg(&pdev->dev, "DMA not available\n");
|
||||
retval = -ENODEV;
|
||||
goto err_dma;
|
||||
}
|
||||
|
||||
retval = atmel_ac97c_pcm_new(chip);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register ac97 pcm device\n");
|
||||
goto err_dma;
|
||||
}
|
||||
|
||||
retval = snd_card_register(card);
|
||||
if (retval) {
|
||||
dev_dbg(&pdev->dev, "could not register sound card\n");
|
||||
goto err_ac97_bus;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, card);
|
||||
|
||||
dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p\n",
|
||||
chip->regs);
|
||||
|
||||
return 0;
|
||||
|
||||
err_dma:
|
||||
if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
|
||||
dma_release_channel(chip->dma.rx_chan);
|
||||
if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
|
||||
dma_release_channel(chip->dma.tx_chan);
|
||||
clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
|
||||
clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
|
||||
chip->dma.rx_chan = NULL;
|
||||
chip->dma.tx_chan = NULL;
|
||||
err_ac97_bus:
|
||||
snd_card_set_dev(card, NULL);
|
||||
|
||||
if (gpio_is_valid(chip->reset_pin))
|
||||
gpio_free(chip->reset_pin);
|
||||
|
||||
iounmap(chip->regs);
|
||||
err_ioremap:
|
||||
snd_card_free(card);
|
||||
err_snd_card_new:
|
||||
clk_disable(pclk);
|
||||
clk_put(pclk);
|
||||
return retval;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int atmel_ac97c_suspend(struct platform_device *pdev, pm_message_t msg)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_ac97c *chip = card->private_data;
|
||||
|
||||
if (test_bit(DMA_RX_READY, &chip->flags))
|
||||
dw_dma_cyclic_stop(chip->dma.rx_chan);
|
||||
if (test_bit(DMA_TX_READY, &chip->flags))
|
||||
dw_dma_cyclic_stop(chip->dma.tx_chan);
|
||||
clk_disable(chip->pclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int atmel_ac97c_resume(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_ac97c *chip = card->private_data;
|
||||
|
||||
clk_enable(chip->pclk);
|
||||
if (test_bit(DMA_RX_READY, &chip->flags))
|
||||
dw_dma_cyclic_start(chip->dma.rx_chan);
|
||||
if (test_bit(DMA_TX_READY, &chip->flags))
|
||||
dw_dma_cyclic_start(chip->dma.tx_chan);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define atmel_ac97c_suspend NULL
|
||||
#define atmel_ac97c_resume NULL
|
||||
#endif
|
||||
|
||||
static int __devexit atmel_ac97c_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_card *card = platform_get_drvdata(pdev);
|
||||
struct atmel_ac97c *chip = get_chip(card);
|
||||
|
||||
if (gpio_is_valid(chip->reset_pin))
|
||||
gpio_free(chip->reset_pin);
|
||||
|
||||
clk_disable(chip->pclk);
|
||||
clk_put(chip->pclk);
|
||||
iounmap(chip->regs);
|
||||
|
||||
if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
|
||||
dma_release_channel(chip->dma.rx_chan);
|
||||
if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
|
||||
dma_release_channel(chip->dma.tx_chan);
|
||||
clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
|
||||
clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
|
||||
chip->dma.rx_chan = NULL;
|
||||
chip->dma.tx_chan = NULL;
|
||||
|
||||
snd_card_set_dev(card, NULL);
|
||||
snd_card_free(card);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver atmel_ac97c_driver = {
|
||||
.remove = __devexit_p(atmel_ac97c_remove),
|
||||
.driver = {
|
||||
.name = "atmel_ac97c",
|
||||
},
|
||||
.suspend = atmel_ac97c_suspend,
|
||||
.resume = atmel_ac97c_resume,
|
||||
};
|
||||
|
||||
static int __init atmel_ac97c_init(void)
|
||||
{
|
||||
return platform_driver_probe(&atmel_ac97c_driver,
|
||||
atmel_ac97c_probe);
|
||||
}
|
||||
module_init(atmel_ac97c_init);
|
||||
|
||||
static void __exit atmel_ac97c_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&atmel_ac97c_driver);
|
||||
}
|
||||
module_exit(atmel_ac97c_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Driver for Atmel AC97 controller");
|
||||
MODULE_AUTHOR("Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>");
|
71
sound/atmel/ac97c.h
Normal file
71
sound/atmel/ac97c.h
Normal file
|
@ -0,0 +1,71 @@
|
|||
/*
|
||||
* Register definitions for the Atmel AC97C controller
|
||||
*
|
||||
* Copyright (C) 2005-2009 Atmel Corporation
|
||||
*
|
||||
* 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_ATMEL_AC97C_H
|
||||
#define __SOUND_ATMEL_AC97C_H
|
||||
|
||||
#define AC97C_MR 0x08
|
||||
#define AC97C_ICA 0x10
|
||||
#define AC97C_OCA 0x14
|
||||
#define AC97C_CARHR 0x20
|
||||
#define AC97C_CATHR 0x24
|
||||
#define AC97C_CASR 0x28
|
||||
#define AC97C_CAMR 0x2c
|
||||
#define AC97C_CBRHR 0x30
|
||||
#define AC97C_CBTHR 0x34
|
||||
#define AC97C_CBSR 0x38
|
||||
#define AC97C_CBMR 0x3c
|
||||
#define AC97C_CORHR 0x40
|
||||
#define AC97C_COTHR 0x44
|
||||
#define AC97C_COSR 0x48
|
||||
#define AC97C_COMR 0x4c
|
||||
#define AC97C_SR 0x50
|
||||
#define AC97C_IER 0x54
|
||||
#define AC97C_IDR 0x58
|
||||
#define AC97C_IMR 0x5c
|
||||
#define AC97C_VERSION 0xfc
|
||||
|
||||
#define AC97C_CATPR PDC_TPR
|
||||
#define AC97C_CATCR PDC_TCR
|
||||
#define AC97C_CATNPR PDC_TNPR
|
||||
#define AC97C_CATNCR PDC_TNCR
|
||||
#define AC97C_CARPR PDC_RPR
|
||||
#define AC97C_CARCR PDC_RCR
|
||||
#define AC97C_CARNPR PDC_RNPR
|
||||
#define AC97C_CARNCR PDC_RNCR
|
||||
#define AC97C_PTCR PDC_PTCR
|
||||
|
||||
#define AC97C_MR_ENA (1 << 0)
|
||||
#define AC97C_MR_WRST (1 << 1)
|
||||
#define AC97C_MR_VRA (1 << 2)
|
||||
|
||||
#define AC97C_CSR_TXRDY (1 << 0)
|
||||
#define AC97C_CSR_UNRUN (1 << 2)
|
||||
#define AC97C_CSR_RXRDY (1 << 4)
|
||||
#define AC97C_CSR_ENDTX (1 << 10)
|
||||
#define AC97C_CSR_ENDRX (1 << 14)
|
||||
|
||||
#define AC97C_CMR_SIZE_20 (0 << 16)
|
||||
#define AC97C_CMR_SIZE_18 (1 << 16)
|
||||
#define AC97C_CMR_SIZE_16 (2 << 16)
|
||||
#define AC97C_CMR_SIZE_10 (3 << 16)
|
||||
#define AC97C_CMR_CEM_LITTLE (1 << 18)
|
||||
#define AC97C_CMR_CEM_BIG (0 << 18)
|
||||
#define AC97C_CMR_CENA (1 << 21)
|
||||
#define AC97C_CMR_DMAEN (1 << 22)
|
||||
|
||||
#define AC97C_SR_CAEVT (1 << 3)
|
||||
|
||||
#define AC97C_CH_ASSIGN(slot, channel) \
|
||||
(AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3)))
|
||||
#define AC97C_CHANNEL_NONE 0x0
|
||||
#define AC97C_CHANNEL_A 0x1
|
||||
#define AC97C_CHANNEL_B 0x2
|
||||
|
||||
#endif /* __SOUND_ATMEL_AC97C_H */
|
Loading…
Reference in a new issue