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Merge branch 'mxc-audio' into for-2.6.34

Browse Source 
Conflicts:
	arch/arm/plat-mxc/Makefile (dual add)
	sound/soc/imx/mx27vis_wm8974.c (API updates & removal)
This commit is contained in:
Mark Brown 2010-01-17 16:47:32 +00:00
commit 9135f6db09
14 changed files with 1755 additions and 1950 deletions
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4
arch/arm/plat-mxc/Makefile
View File

@ -13,3 +13,7 @@ obj-$(CONFIG_USB_EHCI_MXC) += ehci.o
obj-$(CONFIG_MXC_ULPI) += ulpi.o
obj-$(CONFIG_ARCH_MXC_AUDMUX_V1) += audmux-v1.o
obj-$(CONFIG_ARCH_MXC_AUDMUX_V2) += audmux-v2.o
ifdef CONFIG_SND_IMX_SOC
obj-y += ssi-fiq.o
obj-y += ssi-fiq-ksym.o
endif

20
arch/arm/plat-mxc/ssi-fiq-ksym.c Normal file
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@ -0,0 +1,20 @@
/*
* Exported ksyms for the SSI FIQ handler
*
* Copyright (C) 2009, Sascha Hauer <s.hauer@pengutronix.de>
*
* 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 <mach/ssi.h>
EXPORT_SYMBOL(imx_ssi_fiq_tx_buffer);
EXPORT_SYMBOL(imx_ssi_fiq_rx_buffer);
EXPORT_SYMBOL(imx_ssi_fiq_start);
EXPORT_SYMBOL(imx_ssi_fiq_end);
EXPORT_SYMBOL(imx_ssi_fiq_base);

134
arch/arm/plat-mxc/ssi-fiq.S Normal file
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@ -0,0 +1,134 @@
/*
* Copyright (C) 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* 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/linkage.h>
#include <asm/assembler.h>
/*
* r8 = bit 0-15: tx offset, bit 16-31: tx buffer size
* r9 = bit 0-15: rx offset, bit 16-31: rx buffer size
*/
#define SSI_STX0 0x00
#define SSI_SRX0 0x08
#define SSI_SISR 0x14
#define SSI_SIER 0x18
#define SSI_SACNT 0x38
#define SSI_SACNT_AC97EN (1 << 0)
#define SSI_SIER_TFE0_EN (1 << 0)
#define SSI_SISR_TFE0 (1 << 0)
#define SSI_SISR_RFF0 (1 << 2)
#define SSI_SIER_RFF0_EN (1 << 2)
.text
.global imx_ssi_fiq_start
.global imx_ssi_fiq_end
.global imx_ssi_fiq_base
.global imx_ssi_fiq_rx_buffer
.global imx_ssi_fiq_tx_buffer
imx_ssi_fiq_start:
ldr r12, imx_ssi_fiq_base
/* TX */
ldr r11, imx_ssi_fiq_tx_buffer
/* shall we send? */
ldr r13, [r12, #SSI_SIER]
tst r13, #SSI_SIER_TFE0_EN
beq 1f
/* TX FIFO empty? */
ldr r13, [r12, #SSI_SISR]
tst r13, #SSI_SISR_TFE0
beq 1f
mov r10, #0x10000
sub r10, #1
and r10, r10, r8 /* r10: current buffer offset */
add r11, r11, r10
ldrh r13, [r11]
strh r13, [r12, #SSI_STX0]
ldrh r13, [r11, #2]
strh r13, [r12, #SSI_STX0]
ldrh r13, [r11, #4]
strh r13, [r12, #SSI_STX0]
ldrh r13, [r11, #6]
strh r13, [r12, #SSI_STX0]
add r10, #8
lsr r13, r8, #16 /* r13: buffer size */
cmp r10, r13
lslgt r8, r13, #16
addle r8, #8
1:
/* RX */
/* shall we receive? */
ldr r13, [r12, #SSI_SIER]
tst r13, #SSI_SIER_RFF0_EN
beq 1f
/* RX FIFO full? */
ldr r13, [r12, #SSI_SISR]
tst r13, #SSI_SISR_RFF0
beq 1f
ldr r11, imx_ssi_fiq_rx_buffer
mov r10, #0x10000
sub r10, #1
and r10, r10, r9 /* r10: current buffer offset */
add r11, r11, r10
ldr r13, [r12, #SSI_SACNT]
tst r13, #SSI_SACNT_AC97EN
ldr r13, [r12, #SSI_SRX0]
strh r13, [r11]
ldr r13, [r12, #SSI_SRX0]
strh r13, [r11, #2]
/* dummy read to skip slot 12 */
ldrne r13, [r12, #SSI_SRX0]
ldr r13, [r12, #SSI_SRX0]
strh r13, [r11, #4]
ldr r13, [r12, #SSI_SRX0]
strh r13, [r11, #6]
/* dummy read to skip slot 12 */
ldrne r13, [r12, #SSI_SRX0]
add r10, #8
lsr r13, r9, #16 /* r13: buffer size */
cmp r10, r13
lslgt r9, r13, #16
addle r9, #8
1:
@ return from FIQ
subs pc, lr, #4
imx_ssi_fiq_base:
.word 0x0
imx_ssi_fiq_rx_buffer:
.word 0x0
imx_ssi_fiq_tx_buffer:
.word 0x0
imx_ssi_fiq_end:

20
sound/soc/imx/Kconfig
View File

@ -1,21 +1,13 @@
config SND_MX1_MX2_SOC
tristate "SoC Audio for Freecale i.MX1x i.MX2x CPUs"
depends on ARCH_MX2 || ARCH_MX1
config SND_IMX_SOC
tristate "SoC Audio for Freecale i.MX CPUs"
depends on ARCH_MXC && BROKEN
select SND_PCM
select FIQ
select SND_SOC_AC97_BUS
help
Say Y or M if you want to add support for codecs attached to
the MX1 or MX2 SSI interface.
the i.MX SSI interface.
config SND_MXC_SOC_SSI
tristate
config SND_SOC_MX27VIS_WM8974
tristate "SoC Audio support for MX27 - WM8974 Visstrim_sm10 board"
depends on SND_MX1_MX2_SOC && MACH_MX27 && MACH_IMX27_VISSTRIM_M10
select SND_MXC_SOC_SSI
select SND_SOC_WM8974
help
Say Y if you want to add support for SoC audio on Visstrim SM10
board with WM8974.

12
sound/soc/imx/Makefile
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@ -1,10 +1,10 @@
# i.MX Platform Support
snd-soc-mx1_mx2-objs := mx1_mx2-pcm.o
snd-soc-mxc-ssi-objs := mxc-ssi.o
snd-soc-imx-objs := imx-ssi.o imx-pcm-fiq.o
obj-$(CONFIG_SND_MX1_MX2_SOC) += snd-soc-mx1_mx2.o
obj-$(CONFIG_SND_MXC_SOC_SSI) += snd-soc-mxc-ssi.o
ifdef CONFIG_MACH_MX27
snd-soc-imx-objs += imx-pcm-dma-mx2.o
endif
obj-$(CONFIG_SND_IMX_SOC) += snd-soc-imx.o
# i.MX Machine Support
snd-soc-mx27vis-wm8974-objs := mx27vis_wm8974.o
obj-$(CONFIG_SND_SOC_MX27VIS_WM8974) += snd-soc-mx27vis-wm8974.o

313
sound/soc/imx/imx-pcm-dma-mx2.c Normal file
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@ -0,0 +1,313 @@
/*
* imx-pcm-dma-mx2.c -- ALSA Soc Audio Layer
*
* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* This code is based on code copyrighted by Freescale,
* Liam Girdwood, Javier Martin and probably others.
*
* 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/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/dma-mx1-mx2.h>
#include "imx-ssi.h"
struct imx_pcm_runtime_data {
int sg_count;
struct scatterlist *sg_list;
int period;
int periods;
unsigned long dma_addr;
int dma;
struct snd_pcm_substream *substream;
unsigned long offset;
unsigned long size;
unsigned long period_cnt;
void *buf;
int period_time;
};
/* Called by the DMA framework when a period has elapsed */
static void imx_ssi_dma_progression(int channel, void *data,
struct scatterlist *sg)
{
struct snd_pcm_substream *substream = data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
if (!sg)
return;
runtime = iprtd->substream->runtime;
iprtd->offset = sg->dma_address - runtime->dma_addr;
snd_pcm_period_elapsed(iprtd->substream);
}
static void imx_ssi_dma_callback(int channel, void *data)
{
pr_err("%s shouldn't be called\n", __func__);
}
static void snd_imx_dma_err_callback(int channel, void *data, int err)
{
pr_err("DMA error callback called\n");
pr_err("DMA timeout on channel %d -%s%s%s%s\n",
channel,
err & IMX_DMA_ERR_BURST ? " burst" : "",
err & IMX_DMA_ERR_REQUEST ? " request" : "",
err & IMX_DMA_ERR_TRANSFER ? " transfer" : "",
err & IMX_DMA_ERR_BUFFER ? " buffer" : "");
}
static int imx_ssi_dma_alloc(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct imx_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
int ret;
iprtd->dma = imx_dma_request_by_prio(DRV_NAME, DMA_PRIO_HIGH);
if (iprtd->dma < 0) {
pr_err("Failed to claim the audio DMA\n");
return -ENODEV;
}
ret = imx_dma_setup_handlers(iprtd->dma,
imx_ssi_dma_callback,
snd_imx_dma_err_callback, substream);
if (ret)
goto out;
ret = imx_dma_setup_progression_handler(iprtd->dma,
imx_ssi_dma_progression);
if (ret) {
pr_err("Failed to setup the DMA handler\n");
goto out;
}
ret = imx_dma_config_channel(iprtd->dma,
IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
dma_params->dma, 1);
if (ret < 0) {
pr_err("Cannot configure DMA channel: %d\n", ret);
goto out;
}
imx_dma_config_burstlen(iprtd->dma, dma_params->burstsize * 2);
return 0;
out:
imx_dma_free(iprtd->dma);
return ret;
}
static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
int i;
unsigned long dma_addr;
imx_ssi_dma_alloc(substream);
iprtd->size = params_buffer_bytes(params);
iprtd->periods = params_periods(params);
iprtd->period = params_period_bytes(params);
iprtd->offset = 0;
iprtd->period_time = HZ / (params_rate(params) /
params_period_size(params));
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
if (iprtd->sg_count != iprtd->periods) {
kfree(iprtd->sg_list);
iprtd->sg_list = kcalloc(iprtd->periods + 1,
sizeof(struct scatterlist), GFP_KERNEL);
if (!iprtd->sg_list)
return -ENOMEM;
iprtd->sg_count = iprtd->periods + 1;
}
sg_init_table(iprtd->sg_list, iprtd->sg_count);
dma_addr = runtime->dma_addr;
for (i = 0; i < iprtd->periods; i++) {
iprtd->sg_list[i].page_link = 0;
iprtd->sg_list[i].offset = 0;
iprtd->sg_list[i].dma_address = dma_addr;
iprtd->sg_list[i].length = iprtd->period;
dma_addr += iprtd->period;
}
/* close the loop */
iprtd->sg_list[iprtd->sg_count - 1].offset = 0;
iprtd->sg_list[iprtd->sg_count - 1].length = 0;
iprtd->sg_list[iprtd->sg_count - 1].page_link =
((unsigned long) iprtd->sg_list | 0x01) & ~0x02;
return 0;
}
static int snd_imx_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
if (iprtd->dma >= 0) {
imx_dma_free(iprtd->dma);
iprtd->dma = -EINVAL;
}
kfree(iprtd->sg_list);
iprtd->sg_list = NULL;
return 0;
}
static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct imx_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
int err;
iprtd->substream = substream;
iprtd->buf = (unsigned int *)substream->dma_buffer.area;
iprtd->period_cnt = 0;
pr_debug("%s: buf: %p period: %d periods: %d\n",
__func__, iprtd->buf, iprtd->period, iprtd->periods);
err = imx_dma_setup_sg(iprtd->dma, iprtd->sg_list, iprtd->sg_count,
IMX_DMA_LENGTH_LOOP, dma_params->dma_addr,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_MODE_WRITE : DMA_MODE_READ);
if (err)
return err;
return 0;
}
static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
imx_dma_enable(iprtd->dma);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
imx_dma_disable(iprtd->dma);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
return bytes_to_frames(substream->runtime, iprtd->offset);
}
static struct snd_pcm_hardware snd_imx_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rate_min = 8000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
.period_bytes_min = 128,
.period_bytes_max = 16 * 1024,
.periods_min = 2,
.periods_max = 255,
.fifo_size = 0,
};
static int snd_imx_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd;
int ret;
iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
runtime->private_data = iprtd;
ret = snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;
snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
return 0;
}
static struct snd_pcm_ops imx_pcm_ops = {
.open = snd_imx_open,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_imx_pcm_hw_params,
.hw_free = snd_imx_pcm_hw_free,
.prepare = snd_imx_pcm_prepare,
.trigger = snd_imx_pcm_trigger,
.pointer = snd_imx_pcm_pointer,
.mmap = snd_imx_pcm_mmap,
};
static struct snd_soc_platform imx_soc_platform_dma = {
.name = "imx-audio",
.pcm_ops = &imx_pcm_ops,
.pcm_new = imx_pcm_new,
.pcm_free = imx_pcm_free,
};
struct snd_soc_platform *imx_ssi_dma_mx2_init(struct platform_device *pdev,
struct imx_ssi *ssi)
{
ssi->dma_params_tx.burstsize = DMA_TXFIFO_BURST;
ssi->dma_params_rx.burstsize = DMA_RXFIFO_BURST;
return &imx_soc_platform_dma;
}

277
sound/soc/imx/imx-pcm-fiq.c Normal file
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@ -0,0 +1,277 @@
/*
* imx-pcm-fiq.c -- ALSA Soc Audio Layer
*
* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* This code is based on code copyrighted by Freescale,
* Liam Girdwood, Javier Martin and probably others.
*
* 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/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <asm/fiq.h>
#include <mach/ssi.h>
#include "imx-ssi.h"
struct imx_pcm_runtime_data {
int period;
int periods;
unsigned long dma_addr;
int dma;
unsigned long offset;
unsigned long size;
unsigned long period_cnt;
void *buf;
struct timer_list timer;
int period_time;
};
static void imx_ssi_timer_callback(unsigned long data)
{
struct snd_pcm_substream *substream = (void *)data;
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
struct pt_regs regs;
get_fiq_regs(&regs);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
iprtd->offset = regs.ARM_r8 & 0xffff;
else
iprtd->offset = regs.ARM_r9 & 0xffff;
iprtd->timer.expires = jiffies + iprtd->period_time;
add_timer(&iprtd->timer);
snd_pcm_period_elapsed(substream);
}
static struct fiq_handler fh = {
.name = DRV_NAME,
};
static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
iprtd->size = params_buffer_bytes(params);
iprtd->periods = params_periods(params);
iprtd->period = params_period_bytes(params);
iprtd->offset = 0;
iprtd->period_time = HZ / (params_rate(params) / params_period_size(params));
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
return 0;
}
static int snd_imx_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
struct pt_regs regs;
get_fiq_regs(&regs);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
regs.ARM_r8 = (iprtd->period * iprtd->periods - 1) << 16;
else
regs.ARM_r9 = (iprtd->period * iprtd->periods - 1) << 16;
set_fiq_regs(&regs);
return 0;
}
static int fiq_enable;
static int imx_pcm_fiq;
static int snd_imx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
iprtd->timer.expires = jiffies + iprtd->period_time;
add_timer(&iprtd->timer);
if (++fiq_enable == 1)
enable_fiq(imx_pcm_fiq);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
del_timer(&iprtd->timer);
if (--fiq_enable == 0)
disable_fiq(imx_pcm_fiq);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t snd_imx_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
return bytes_to_frames(substream->runtime, iprtd->offset);
}
static struct snd_pcm_hardware snd_imx_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rate_min = 8000,
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = IMX_SSI_DMABUF_SIZE,
.period_bytes_min = 128,
.period_bytes_max = 16 * 1024,
.periods_min = 2,
.periods_max = 255,
.fifo_size = 0,
};
static int snd_imx_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd;
int ret;
iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
runtime->private_data = iprtd;
init_timer(&iprtd->timer);
iprtd->timer.data = (unsigned long)substream;
iprtd->timer.function = imx_ssi_timer_callback;
ret = snd_pcm_hw_constraint_integer(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;
snd_soc_set_runtime_hwparams(substream, &snd_imx_hardware);
return 0;
}
static int snd_imx_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct imx_pcm_runtime_data *iprtd = runtime->private_data;
del_timer_sync(&iprtd->timer);
kfree(iprtd);
return 0;
}
static struct snd_pcm_ops imx_pcm_ops = {
.open = snd_imx_open,
.close = snd_imx_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_imx_pcm_hw_params,
.prepare = snd_imx_pcm_prepare,
.trigger = snd_imx_pcm_trigger,
.pointer = snd_imx_pcm_pointer,
.mmap = snd_imx_pcm_mmap,
};
static int imx_pcm_fiq_new(struct snd_card *card, struct snd_soc_dai *dai,
struct snd_pcm *pcm)
{
int ret;
ret = imx_pcm_new(card, dai, pcm);
if (ret)
return ret;
if (dai->playback.channels_min) {
struct snd_pcm_substream *substream =
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
struct snd_dma_buffer *buf = &substream->dma_buffer;
imx_ssi_fiq_tx_buffer = (unsigned long)buf->area;
}
if (dai->capture.channels_min) {
struct snd_pcm_substream *substream =
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
struct snd_dma_buffer *buf = &substream->dma_buffer;
imx_ssi_fiq_rx_buffer = (unsigned long)buf->area;
}
set_fiq_handler(&imx_ssi_fiq_start,
&imx_ssi_fiq_end - &imx_ssi_fiq_start);
return 0;
}
static struct snd_soc_platform imx_soc_platform_fiq = {
.pcm_ops = &imx_pcm_ops,
.pcm_new = imx_pcm_fiq_new,
.pcm_free = imx_pcm_free,
};
struct snd_soc_platform *imx_ssi_fiq_init(struct platform_device *pdev,
struct imx_ssi *ssi)
{
int ret = 0;
ret = claim_fiq(&fh);
if (ret) {
dev_err(&pdev->dev, "failed to claim fiq: %d", ret);
return ERR_PTR(ret);
}
mxc_set_irq_fiq(ssi->irq, 1);
imx_pcm_fiq = ssi->irq;
imx_ssi_fiq_base = (unsigned long)ssi->base;
ssi->dma_params_tx.burstsize = 4;
ssi->dma_params_rx.burstsize = 6;
return &imx_soc_platform_fiq;
}
void imx_ssi_fiq_exit(struct platform_device *pdev,
struct imx_ssi *ssi)
{
mxc_set_irq_fiq(ssi->irq, 0);
release_fiq(&fh);
}

758
sound/soc/imx/imx-ssi.c Normal file
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@ -0,0 +1,758 @@
/*
* imx-ssi.c -- ALSA Soc Audio Layer
*
* Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
*
* This code is based on code copyrighted by Freescale,
* Liam Girdwood, Javier Martin and probably others.
*
* 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.
*
*
* The i.MX SSI core has some nasty limitations in AC97 mode. While most
* sane processor vendors have a FIFO per AC97 slot, the i.MX has only
* one FIFO which combines all valid receive slots. We cannot even select
* which slots we want to receive. The WM9712 with which this driver
* was developped with always sends GPIO status data in slot 12 which
* we receive in our (PCM-) data stream. The only chance we have is to
* manually skip this data in the FIQ handler. With sampling rates different
* from 48000Hz not every frame has valid receive data, so the ratio
* between pcm data and GPIO status data changes. Our FIQ handler is not
* able to handle this, hence this driver only works with 48000Hz sampling
* rate.
* Reading and writing AC97 registers is another challange. The core
* provides us status bits when the read register is updated with *another*
* value. When we read the same register two times (and the register still
* contains the same value) these status bits are not set. We work
* around this by not polling these bits but only wait a fixed delay.
*
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/ssi.h>
#include <mach/hardware.h>
#include "imx-ssi.h"
#define SSI_SACNT_DEFAULT (SSI_SACNT_AC97EN | SSI_SACNT_FV)
/*
* SSI Network Mode or TDM slots configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
{
struct imx_ssi *ssi = cpu_dai->private_data;
u32 sccr;
sccr = readl(ssi->base + SSI_STCCR);
sccr &= ~SSI_STCCR_DC_MASK;
sccr |= SSI_STCCR_DC(slots - 1);
writel(sccr, ssi->base + SSI_STCCR);
sccr = readl(ssi->base + SSI_SRCCR);
sccr &= ~SSI_STCCR_DC_MASK;
sccr |= SSI_STCCR_DC(slots - 1);
writel(sccr, ssi->base + SSI_SRCCR);
writel(tx_mask, ssi->base + SSI_STMSK);
writel(rx_mask, ssi->base + SSI_SRMSK);
return 0;
}
/*
* SSI DAI format configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
* Note: We don't use the I2S modes but instead manually configure the
* SSI for I2S because the I2S mode is only a register preset.
*/
static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
struct imx_ssi *ssi = cpu_dai->private_data;
u32 strcr = 0, scr;
scr = readl(ssi->base + SSI_SCR) & ~(SSI_SCR_SYN | SSI_SCR_NET);
/* DAI mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* data on rising edge of bclk, frame low 1clk before data */
strcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0;
scr |= SSI_SCR_NET;
break;
case SND_SOC_DAIFMT_LEFT_J:
/* data on rising edge of bclk, frame high with data */
strcr |= SSI_STCR_TXBIT0;
break;
case SND_SOC_DAIFMT_DSP_B:
/* data on rising edge of bclk, frame high with data */
strcr |= SSI_STCR_TFSL;
break;
case SND_SOC_DAIFMT_DSP_A:
/* data on rising edge of bclk, frame high 1clk before data */
strcr |= SSI_STCR_TFSL | SSI_STCR_TEFS;
break;
}
/* DAI clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
strcr |= SSI_STCR_TFSI;
strcr &= ~SSI_STCR_TSCKP;
break;
case SND_SOC_DAIFMT_IB_NF:
strcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI);
break;
case SND_SOC_DAIFMT_NB_IF:
strcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP;
break;
case SND_SOC_DAIFMT_NB_NF:
strcr &= ~SSI_STCR_TFSI;
strcr |= SSI_STCR_TSCKP;
break;
}
/* DAI clock master masks */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
break;
default:
/* Master mode not implemented, needs handling of clocks. */
return -EINVAL;
}
strcr |= SSI_STCR_TFEN0;
writel(strcr, ssi->base + SSI_STCR);
writel(strcr, ssi->base + SSI_SRCR);
writel(scr, ssi->base + SSI_SCR);
return 0;
}
/*
* SSI system clock configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct imx_ssi *ssi = cpu_dai->private_data;
u32 scr;
scr = readl(ssi->base + SSI_SCR);
switch (clk_id) {
case IMX_SSP_SYS_CLK:
if (dir == SND_SOC_CLOCK_OUT)
scr |= SSI_SCR_SYS_CLK_EN;
else
scr &= ~SSI_SCR_SYS_CLK_EN;
break;
default:
return -EINVAL;
}
writel(scr, ssi->base + SSI_SCR);
return 0;
}
/*
* SSI Clock dividers
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
struct imx_ssi *ssi = cpu_dai->private_data;
u32 stccr, srccr;
stccr = readl(ssi->base + SSI_STCCR);
srccr = readl(ssi->base + SSI_SRCCR);
switch (div_id) {
case IMX_SSI_TX_DIV_2:
stccr &= ~SSI_STCCR_DIV2;
stccr |= div;
break;
case IMX_SSI_TX_DIV_PSR:
stccr &= ~SSI_STCCR_PSR;
stccr |= div;
break;
case IMX_SSI_TX_DIV_PM:
stccr &= ~0xff;
stccr |= SSI_STCCR_PM(div);
break;
case IMX_SSI_RX_DIV_2:
stccr &= ~SSI_STCCR_DIV2;
stccr |= div;
break;
case IMX_SSI_RX_DIV_PSR:
stccr &= ~SSI_STCCR_PSR;
stccr |= div;
break;
case IMX_SSI_RX_DIV_PM:
stccr &= ~0xff;
stccr |= SSI_STCCR_PM(div);
break;
default:
return -EINVAL;
}
writel(stccr, ssi->base + SSI_STCCR);
writel(srccr, ssi->base + SSI_SRCCR);
return 0;
}
/*
* Should only be called when port is inactive (i.e. SSIEN = 0),
* although can be called multiple times by upper layers.
*/
static int imx_ssi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
struct imx_ssi *ssi = cpu_dai->private_data;
u32 reg, sccr;
/* Tx/Rx config */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
reg = SSI_STCCR;
cpu_dai->dma_data = &ssi->dma_params_tx;
} else {
reg = SSI_SRCCR;
cpu_dai->dma_data = &ssi->dma_params_rx;
}
sccr = readl(ssi->base + reg) & ~SSI_STCCR_WL_MASK;
/* DAI data (word) size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
sccr |= SSI_SRCCR_WL(16);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
sccr |= SSI_SRCCR_WL(20);
break;
case SNDRV_PCM_FORMAT_S24_LE:
sccr |= SSI_SRCCR_WL(24);
break;
}
writel(sccr, ssi->base + reg);
return 0;
}
static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct imx_ssi *ssi = cpu_dai->private_data;
unsigned int sier_bits, sier;
unsigned int scr;
scr = readl(ssi->base + SSI_SCR);
sier = readl(ssi->base + SSI_SIER);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
if (ssi->flags & IMX_SSI_DMA)
sier_bits = SSI_SIER_TDMAE;
else
sier_bits = SSI_SIER_TIE | SSI_SIER_TFE0_EN;
} else {
if (ssi->flags & IMX_SSI_DMA)
sier_bits = SSI_SIER_RDMAE;
else
sier_bits = SSI_SIER_RIE | SSI_SIER_RFF0_EN;
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
scr |= SSI_SCR_TE;
else
scr |= SSI_SCR_RE;
sier |= sier_bits;
if (++ssi->enabled == 1)
scr |= SSI_SCR_SSIEN;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
scr &= ~SSI_SCR_TE;
else
scr &= ~SSI_SCR_RE;
sier &= ~sier_bits;
if (--ssi->enabled == 0)
scr &= ~SSI_SCR_SSIEN;
break;
default:
return -EINVAL;
}
if (!(ssi->flags & IMX_SSI_USE_AC97))
/* rx/tx are always enabled to access ac97 registers */
writel(scr, ssi->base + SSI_SCR);
writel(sier, ssi->base + SSI_SIER);
return 0;
}
static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
.hw_params = imx_ssi_hw_params,
.set_fmt = imx_ssi_set_dai_fmt,
.set_clkdiv = imx_ssi_set_dai_clkdiv,
.set_sysclk = imx_ssi_set_dai_sysclk,
.set_tdm_slot = imx_ssi_set_dai_tdm_slot,
.trigger = imx_ssi_trigger,
};
static struct snd_soc_dai imx_ssi_dai = {
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &imx_ssi_pcm_dai_ops,
};
int snd_imx_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int ret;
ret = dma_mmap_coherent(NULL, vma, runtime->dma_area,
runtime->dma_addr, runtime->dma_bytes);
pr_debug("%s: ret: %d %p 0x%08x 0x%08x\n", __func__, ret,
runtime->dma_area,
runtime->dma_addr,
runtime->dma_bytes);
return ret;
}
static int imx_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 = IMX_SSI_DMABUF_SIZE;
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);
if (!buf->area)
return -ENOMEM;
buf->bytes = size;
return 0;
}
static u64 imx_pcm_dmamask = DMA_BIT_MASK(32);
int imx_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 = &imx_pcm_dmamask;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
if (dai->playback.channels_min) {
ret = imx_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret)
goto out;
}
if (dai->capture.channels_min) {
ret = imx_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
if (ret)
goto out;
}
out:
return ret;
}
void imx_pcm_free(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;
}
}
struct snd_soc_platform imx_soc_platform = {
.name = "imx-audio",
};
EXPORT_SYMBOL_GPL(imx_soc_platform);
static struct snd_soc_dai imx_ac97_dai = {
.name = "AC97",
.ac97_control = 1,
.playback = {
.stream_name = "AC97 Playback",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "AC97 Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &imx_ssi_pcm_dai_ops,
};
static void setup_channel_to_ac97(struct imx_ssi *imx_ssi)
{
void __iomem *base = imx_ssi->base;
writel(0x0, base + SSI_SCR);
writel(0x0, base + SSI_STCR);
writel(0x0, base + SSI_SRCR);
writel(SSI_SCR_SYN | SSI_SCR_NET, base + SSI_SCR);
writel(SSI_SFCSR_RFWM0(8) |
SSI_SFCSR_TFWM0(8) |
SSI_SFCSR_RFWM1(8) |
SSI_SFCSR_TFWM1(8), base + SSI_SFCSR);
writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_STCCR);
writel(SSI_STCCR_WL(16) | SSI_STCCR_DC(12), base + SSI_SRCCR);
writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN, base + SSI_SCR);
writel(SSI_SOR_WAIT(3), base + SSI_SOR);
writel(SSI_SCR_SYN | SSI_SCR_NET | SSI_SCR_SSIEN |
SSI_SCR_TE | SSI_SCR_RE,
base + SSI_SCR);
writel(SSI_SACNT_DEFAULT, base + SSI_SACNT);
writel(0xff, base + SSI_SACCDIS);
writel(0x300, base + SSI_SACCEN);
}
static struct imx_ssi *ac97_ssi;
static void imx_ssi_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
struct imx_ssi *imx_ssi = ac97_ssi;
void __iomem *base = imx_ssi->base;
unsigned int lreg;
unsigned int lval;
if (reg > 0x7f)
return;
pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);
lreg = reg << 12;
writel(lreg, base + SSI_SACADD);
lval = val << 4;
writel(lval , base + SSI_SACDAT);
writel(SSI_SACNT_DEFAULT | SSI_SACNT_WR, base + SSI_SACNT);
udelay(100);
}
static unsigned short imx_ssi_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
struct imx_ssi *imx_ssi = ac97_ssi;
void __iomem *base = imx_ssi->base;
unsigned short val = -1;
unsigned int lreg;
lreg = (reg & 0x7f) << 12 ;
writel(lreg, base + SSI_SACADD);
writel(SSI_SACNT_DEFAULT | SSI_SACNT_RD, base + SSI_SACNT);
udelay(100);
val = (readl(base + SSI_SACDAT) >> 4) & 0xffff;
pr_debug("%s: 0x%02x 0x%04x\n", __func__, reg, val);
return val;
}
static void imx_ssi_ac97_reset(struct snd_ac97 *ac97)
{
struct imx_ssi *imx_ssi = ac97_ssi;
if (imx_ssi->ac97_reset)
imx_ssi->ac97_reset(ac97);
}
static void imx_ssi_ac97_warm_reset(struct snd_ac97 *ac97)
{
struct imx_ssi *imx_ssi = ac97_ssi;
if (imx_ssi->ac97_warm_reset)
imx_ssi->ac97_warm_reset(ac97);
}
struct snd_ac97_bus_ops soc_ac97_ops = {
.read = imx_ssi_ac97_read,
.write = imx_ssi_ac97_write,
.reset = imx_ssi_ac97_reset,
.warm_reset = imx_ssi_ac97_warm_reset
};
EXPORT_SYMBOL_GPL(soc_ac97_ops);
struct snd_soc_dai imx_ssi_pcm_dai[2];
EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai);
static int imx_ssi_probe(struct platform_device *pdev)
{
struct resource *res;
struct imx_ssi *ssi;
struct imx_ssi_platform_data *pdata = pdev->dev.platform_data;
struct snd_soc_platform *platform;
int ret = 0;
unsigned int val;
struct snd_soc_dai *dai = &imx_ssi_pcm_dai[pdev->id];
if (dai->id >= ARRAY_SIZE(imx_ssi_pcm_dai))
return -EINVAL;
ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
if (!ssi)
return -ENOMEM;
if (pdata) {
ssi->ac97_reset = pdata->ac97_reset;
ssi->ac97_warm_reset = pdata->ac97_warm_reset;
ssi->flags = pdata->flags;
}
ssi->irq = platform_get_irq(pdev, 0);
ssi->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(ssi->clk)) {
ret = PTR_ERR(ssi->clk);
dev_err(&pdev->dev, "Cannot get the clock: %d\n",
ret);
goto failed_clk;
}
clk_enable(ssi->clk);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
goto failed_get_resource;
}
if (!request_mem_region(res->start, resource_size(res), DRV_NAME)) {
dev_err(&pdev->dev, "request_mem_region failed\n");
ret = -EBUSY;
goto failed_get_resource;
}
ssi->base = ioremap(res->start, resource_size(res));
if (!ssi->base) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENODEV;
goto failed_ioremap;
}
if (ssi->flags & IMX_SSI_USE_AC97) {
if (ac97_ssi) {
ret = -EBUSY;
goto failed_ac97;
}
ac97_ssi = ssi;
setup_channel_to_ac97(ssi);
memcpy(dai, &imx_ac97_dai, sizeof(imx_ac97_dai));
} else
memcpy(dai, &imx_ssi_dai, sizeof(imx_ssi_dai));
writel(0x0, ssi->base + SSI_SIER);
ssi->dma_params_rx.dma_addr = res->start + SSI_SRX0;
ssi->dma_params_tx.dma_addr = res->start + SSI_STX0;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx0");
if (res)
ssi->dma_params_tx.dma = res->start;
res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx0");
if (res)
ssi->dma_params_rx.dma = res->start;
dai->id = pdev->id;
dai->dev = &pdev->dev;
dai->name = kasprintf(GFP_KERNEL, "imx-ssi.%d", pdev->id);
dai->private_data = ssi;
if ((cpu_is_mx27() || cpu_is_mx21()) &&
!(ssi->flags & IMX_SSI_USE_AC97)) {
ssi->flags |= IMX_SSI_DMA;
platform = imx_ssi_dma_mx2_init(pdev, ssi);
} else
platform = imx_ssi_fiq_init(pdev, ssi);
imx_soc_platform.pcm_ops = platform->pcm_ops;
imx_soc_platform.pcm_new = platform->pcm_new;
imx_soc_platform.pcm_free = platform->pcm_free;
val = SSI_SFCSR_TFWM0(ssi->dma_params_tx.burstsize) |
SSI_SFCSR_RFWM0(ssi->dma_params_rx.burstsize);
writel(val, ssi->base + SSI_SFCSR);
ret = snd_soc_register_dai(dai);
if (ret) {
dev_err(&pdev->dev, "register DAI failed\n");
goto failed_register;
}
platform_set_drvdata(pdev, ssi);
return 0;
failed_register:
failed_ac97:
iounmap(ssi->base);
failed_ioremap:
release_mem_region(res->start, resource_size(res));
failed_get_resource:
clk_disable(ssi->clk);
clk_put(ssi->clk);
failed_clk:
kfree(ssi);
return ret;
}
static int __devexit imx_ssi_remove(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct imx_ssi *ssi = platform_get_drvdata(pdev);
struct snd_soc_dai *dai = &imx_ssi_pcm_dai[pdev->id];
snd_soc_unregister_dai(dai);
if (ssi->flags & IMX_SSI_USE_AC97)
ac97_ssi = NULL;
if (!(ssi->flags & IMX_SSI_DMA))
imx_ssi_fiq_exit(pdev, ssi);
iounmap(ssi->base);
release_mem_region(res->start, resource_size(res));
clk_disable(ssi->clk);
clk_put(ssi->clk);
kfree(ssi);
return 0;
}
static struct platform_driver imx_ssi_driver = {
.probe = imx_ssi_probe,
.remove = __devexit_p(imx_ssi_remove),
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
};
static int __init imx_ssi_init(void)
{
int ret;
ret = snd_soc_register_platform(&imx_soc_platform);
if (ret) {
pr_err("failed to register soc platform: %d\n", ret);
return ret;
}
ret = platform_driver_register(&imx_ssi_driver);
if (ret) {
snd_soc_unregister_platform(&imx_soc_platform);
return ret;
}
return 0;
}
static void __exit imx_ssi_exit(void)
{
platform_driver_unregister(&imx_ssi_driver);
snd_soc_unregister_platform(&imx_soc_platform);
}
module_init(imx_ssi_init);
module_exit(imx_ssi_exit);
/* Module information */
MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>");
MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface");
MODULE_LICENSE("GPL");

237
sound/soc/imx/imx-ssi.h Normal file
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@ -0,0 +1,237 @@
/*
* 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 _IMX_SSI_H
#define _IMX_SSI_H
#define SSI_STX0 0x00
#define SSI_STX1 0x04
#define SSI_SRX0 0x08
#define SSI_SRX1 0x0c
#define SSI_SCR 0x10
#define SSI_SCR_CLK_IST (1 << 9)
#define SSI_SCR_CLK_IST_SHIFT 9
#define SSI_SCR_TCH_EN (1 << 8)
#define SSI_SCR_SYS_CLK_EN (1 << 7)
#define SSI_SCR_I2S_MODE_NORM (0 << 5)
#define SSI_SCR_I2S_MODE_MSTR (1 << 5)
#define SSI_SCR_I2S_MODE_SLAVE (2 << 5)
#define SSI_I2S_MODE_MASK (3 << 5)
#define SSI_SCR_SYN (1 << 4)
#define SSI_SCR_NET (1 << 3)
#define SSI_SCR_RE (1 << 2)
#define SSI_SCR_TE (1 << 1)
#define SSI_SCR_SSIEN (1 << 0)
#define SSI_SISR 0x14
#define SSI_SISR_MASK ((1 << 19) - 1)
#define SSI_SISR_CMDAU (1 << 18)
#define SSI_SISR_CMDDU (1 << 17)
#define SSI_SISR_RXT (1 << 16)
#define SSI_SISR_RDR1 (1 << 15)
#define SSI_SISR_RDR0 (1 << 14)
#define SSI_SISR_TDE1 (1 << 13)
#define SSI_SISR_TDE0 (1 << 12)
#define SSI_SISR_ROE1 (1 << 11)
#define SSI_SISR_ROE0 (1 << 10)
#define SSI_SISR_TUE1 (1 << 9)
#define SSI_SISR_TUE0 (1 << 8)
#define SSI_SISR_TFS (1 << 7)
#define SSI_SISR_RFS (1 << 6)
#define SSI_SISR_TLS (1 << 5)
#define SSI_SISR_RLS (1 << 4)
#define SSI_SISR_RFF1 (1 << 3)
#define SSI_SISR_RFF0 (1 << 2)
#define SSI_SISR_TFE1 (1 << 1)
#define SSI_SISR_TFE0 (1 << 0)
#define SSI_SIER 0x18
#define SSI_SIER_RDMAE (1 << 22)
#define SSI_SIER_RIE (1 << 21)
#define SSI_SIER_TDMAE (1 << 20)
#define SSI_SIER_TIE (1 << 19)
#define SSI_SIER_CMDAU_EN (1 << 18)
#define SSI_SIER_CMDDU_EN (1 << 17)
#define SSI_SIER_RXT_EN (1 << 16)
#define SSI_SIER_RDR1_EN (1 << 15)
#define SSI_SIER_RDR0_EN (1 << 14)
#define SSI_SIER_TDE1_EN (1 << 13)
#define SSI_SIER_TDE0_EN (1 << 12)
#define SSI_SIER_ROE1_EN (1 << 11)
#define SSI_SIER_ROE0_EN (1 << 10)
#define SSI_SIER_TUE1_EN (1 << 9)
#define SSI_SIER_TUE0_EN (1 << 8)
#define SSI_SIER_TFS_EN (1 << 7)
#define SSI_SIER_RFS_EN (1 << 6)
#define SSI_SIER_TLS_EN (1 << 5)
#define SSI_SIER_RLS_EN (1 << 4)
#define SSI_SIER_RFF1_EN (1 << 3)
#define SSI_SIER_RFF0_EN (1 << 2)
#define SSI_SIER_TFE1_EN (1 << 1)
#define SSI_SIER_TFE0_EN (1 << 0)
#define SSI_STCR 0x1c
#define SSI_STCR_TXBIT0 (1 << 9)
#define SSI_STCR_TFEN1 (1 << 8)
#define SSI_STCR_TFEN0 (1 << 7)
#define SSI_FIFO_ENABLE_0_SHIFT 7
#define SSI_STCR_TFDIR (1 << 6)
#define SSI_STCR_TXDIR (1 << 5)
#define SSI_STCR_TSHFD (1 << 4)
#define SSI_STCR_TSCKP (1 << 3)
#define SSI_STCR_TFSI (1 << 2)
#define SSI_STCR_TFSL (1 << 1)
#define SSI_STCR_TEFS (1 << 0)
#define SSI_SRCR 0x20
#define SSI_SRCR_RXBIT0 (1 << 9)
#define SSI_SRCR_RFEN1 (1 << 8)
#define SSI_SRCR_RFEN0 (1 << 7)
#define SSI_FIFO_ENABLE_0_SHIFT 7
#define SSI_SRCR_RFDIR (1 << 6)
#define SSI_SRCR_RXDIR (1 << 5)
#define SSI_SRCR_RSHFD (1 << 4)
#define SSI_SRCR_RSCKP (1 << 3)
#define SSI_SRCR_RFSI (1 << 2)
#define SSI_SRCR_RFSL (1 << 1)
#define SSI_SRCR_REFS (1 << 0)
#define SSI_SRCCR 0x28
#define SSI_SRCCR_DIV2 (1 << 18)
#define SSI_SRCCR_PSR (1 << 17)
#define SSI_SRCCR_WL(x) ((((x) - 2) >> 1) << 13)
#define SSI_SRCCR_DC(x) (((x) & 0x1f) << 8)
#define SSI_SRCCR_PM(x) (((x) & 0xff) << 0)
#define SSI_SRCCR_WL_MASK (0xf << 13)
#define SSI_SRCCR_DC_MASK (0x1f << 8)
#define SSI_SRCCR_PM_MASK (0xff << 0)
#define SSI_STCCR 0x24
#define SSI_STCCR_DIV2 (1 << 18)
#define SSI_STCCR_PSR (1 << 17)
#define SSI_STCCR_WL(x) ((((x) - 2) >> 1) << 13)
#define SSI_STCCR_DC(x) (((x) & 0x1f) << 8)
#define SSI_STCCR_PM(x) (((x) & 0xff) << 0)
#define SSI_STCCR_WL_MASK (0xf << 13)
#define SSI_STCCR_DC_MASK (0x1f << 8)
#define SSI_STCCR_PM_MASK (0xff << 0)
#define SSI_SFCSR 0x2c
#define SSI_SFCSR_RFCNT1(x) (((x) & 0xf) << 28)
#define SSI_RX_FIFO_1_COUNT_SHIFT 28
#define SSI_SFCSR_TFCNT1(x) (((x) & 0xf) << 24)
#define SSI_TX_FIFO_1_COUNT_SHIFT 24
#define SSI_SFCSR_RFWM1(x) (((x) & 0xf) << 20)
#define SSI_SFCSR_TFWM1(x) (((x) & 0xf) << 16)
#define SSI_SFCSR_RFCNT0(x) (((x) & 0xf) << 12)
#define SSI_RX_FIFO_0_COUNT_SHIFT 12
#define SSI_SFCSR_TFCNT0(x) (((x) & 0xf) << 8)
#define SSI_TX_FIFO_0_COUNT_SHIFT 8
#define SSI_SFCSR_RFWM0(x) (((x) & 0xf) << 4)
#define SSI_SFCSR_TFWM0(x) (((x) & 0xf) << 0)
#define SSI_SFCSR_RFWM0_MASK (0xf << 4)
#define SSI_SFCSR_TFWM0_MASK (0xf << 0)
#define SSI_STR 0x30
#define SSI_STR_TEST (1 << 15)
#define SSI_STR_RCK2TCK (1 << 14)
#define SSI_STR_RFS2TFS (1 << 13)
#define SSI_STR_RXSTATE(x) (((x) & 0xf) << 8)
#define SSI_STR_TXD2RXD (1 << 7)
#define SSI_STR_TCK2RCK (1 << 6)
#define SSI_STR_TFS2RFS (1 << 5)
#define SSI_STR_TXSTATE(x) (((x) & 0xf) << 0)
#define SSI_SOR 0x34
#define SSI_SOR_CLKOFF (1 << 6)
#define SSI_SOR_RX_CLR (1 << 5)
#define SSI_SOR_TX_CLR (1 << 4)
#define SSI_SOR_INIT (1 << 3)
#define SSI_SOR_WAIT(x) (((x) & 0x3) << 1)
#define SSI_SOR_WAIT_MASK (0x3 << 1)
#define SSI_SOR_SYNRST (1 << 0)
#define SSI_SACNT 0x38
#define SSI_SACNT_FRDIV(x) (((x) & 0x3f) << 5)
#define SSI_SACNT_WR (1 << 4)
#define SSI_SACNT_RD (1 << 3)
#define SSI_SACNT_TIF (1 << 2)
#define SSI_SACNT_FV (1 << 1)
#define SSI_SACNT_AC97EN (1 << 0)
#define SSI_SACADD 0x3c
#define SSI_SACDAT 0x40
#define SSI_SATAG 0x44
#define SSI_STMSK 0x48
#define SSI_SRMSK 0x4c
#define SSI_SACCST 0x50
#define SSI_SACCEN 0x54
#define SSI_SACCDIS 0x58
/* SSI clock sources */
#define IMX_SSP_SYS_CLK 0
/* SSI audio dividers */
#define IMX_SSI_TX_DIV_2 0
#define IMX_SSI_TX_DIV_PSR 1
#define IMX_SSI_TX_DIV_PM 2
#define IMX_SSI_RX_DIV_2 3
#define IMX_SSI_RX_DIV_PSR 4
#define IMX_SSI_RX_DIV_PM 5
extern struct snd_soc_dai imx_ssi_pcm_dai[2];
extern struct snd_soc_platform imx_soc_platform;
#define DRV_NAME "imx-ssi"
struct imx_pcm_dma_params {
int dma;
unsigned long dma_addr;
int burstsize;
};
struct imx_ssi {
struct platform_device *ac97_dev;
struct snd_soc_device imx_ac97;
struct clk *clk;
void __iomem *base;
int irq;
int fiq_enable;
unsigned int offset;
unsigned int flags;
void (*ac97_reset) (struct snd_ac97 *ac97);
void (*ac97_warm_reset)(struct snd_ac97 *ac97);
struct imx_pcm_dma_params dma_params_rx;
struct imx_pcm_dma_params dma_params_tx;
int enabled;
};
struct snd_soc_platform *imx_ssi_fiq_init(struct platform_device *pdev,
struct imx_ssi *ssi);
void imx_ssi_fiq_exit(struct platform_device *pdev, struct imx_ssi *ssi);
struct snd_soc_platform *imx_ssi_dma_mx2_init(struct platform_device *pdev,
struct imx_ssi *ssi);
int snd_imx_pcm_mmap(struct snd_pcm_substream *substream, struct vm_area_struct *vma);
int imx_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
struct snd_pcm *pcm);
void imx_pcm_free(struct snd_pcm *pcm);
/*
* Do not change this as the FIQ handler depends on this size
*/
#define IMX_SSI_DMABUF_SIZE (64 * 1024)
#define DMA_RXFIFO_BURST 0x4
#define DMA_TXFIFO_BURST 0x6
#endif /* _IMX_SSI_H */

488
sound/soc/imx/mx1_mx2-pcm.c
View File

@ -1,488 +0,0 @@
/*
* mx1_mx2-pcm.c -- ALSA SoC interface for Freescale i.MX1x, i.MX2x CPUs
*
* Copyright 2009 Vista Silicon S.L.
* Author: Javier Martin
* javier.martin@vista-silicon.com
*
* Based on mxc-pcm.c by Liam Girdwood.
*
* 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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <asm/dma.h>
#include <mach/hardware.h>
#include <mach/dma-mx1-mx2.h>
#include "mx1_mx2-pcm.h"
static const struct snd_pcm_hardware mx1_mx2_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.buffer_bytes_max = 32 * 1024,
.period_bytes_min = 64,
.period_bytes_max = 8 * 1024,
.periods_min = 2,
.periods_max = 255,
.fifo_size = 0,
};
struct mx1_mx2_runtime_data {
int dma_ch;
int active;
unsigned int period;
unsigned int periods;
int tx_spin;
spinlock_t dma_lock;
struct mx1_mx2_pcm_dma_params *dma_params;
};
/**
* This function stops the current dma transfer for playback
* and clears the dma pointers.
*
* @param substream pointer to the structure of the current stream.
*
*/
static int audio_stop_dma(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
unsigned long flags;
spin_lock_irqsave(&prtd->dma_lock, flags);
pr_debug("%s\n", __func__);
prtd->active = 0;
prtd->period = 0;
prtd->periods = 0;
/* this stops the dma channel and clears the buffer ptrs */
imx_dma_disable(prtd->dma_ch);
spin_unlock_irqrestore(&prtd->dma_lock, flags);
return 0;
}
/**
* This function is called whenever a new audio block needs to be
* transferred to the codec. The function receives the address and the size
* of the new block and start a new DMA transfer.
*
* @param substream pointer to the structure of the current stream.
*
*/
static int dma_new_period(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
unsigned int dma_size;
unsigned int offset;
int ret = 0;
dma_addr_t mem_addr;
unsigned int dev_addr;
if (prtd->active) {
dma_size = frames_to_bytes(runtime, runtime->period_size);
offset = dma_size * prtd->period;
pr_debug("%s: period (%d) out of (%d)\n", __func__,
prtd->period,
runtime->periods);
pr_debug("period_size %d frames\n offset %d bytes\n",
(unsigned int)runtime->period_size,
offset);
pr_debug("dma_size %d bytes\n", dma_size);
snd_BUG_ON(dma_size > mx1_mx2_pcm_hardware.period_bytes_max);
mem_addr = (dma_addr_t)(runtime->dma_addr + offset);
dev_addr = prtd->dma_params->per_address;
pr_debug("%s: mem_addr is %x\n dev_addr is %x\n",
__func__, mem_addr, dev_addr);
ret = imx_dma_setup_single(prtd->dma_ch, mem_addr,
dma_size, dev_addr,
prtd->dma_params->transfer_type);
if (ret < 0) {
printk(KERN_ERR "Error %d configuring DMA\n", ret);
return ret;
}
imx_dma_enable(prtd->dma_ch);
pr_debug("%s: transfer enabled\nmem_addr = %x\n",
__func__, (unsigned int) mem_addr);
pr_debug("dev_addr = %x\ndma_size = %d\n",
(unsigned int) dev_addr, dma_size);
prtd->tx_spin = 1; /* FGA little trick to retrieve DMA pos */
prtd->period++;
prtd->period %= runtime->periods;
}
return ret;
}
/**
* This is a callback which will be called
* when a TX transfer finishes. The call occurs
* in interrupt context.
*
* @param dat pointer to the structure of the current stream.
*
*/
static void audio_dma_irq(int channel, void *data)
{
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
struct mx1_mx2_runtime_data *prtd;
unsigned int dma_size;
unsigned int previous_period;
unsigned int offset;
substream = data;
runtime = substream->runtime;
prtd = runtime->private_data;
previous_period = prtd->periods;
dma_size = frames_to_bytes(runtime, runtime->period_size);
offset = dma_size * previous_period;
prtd->tx_spin = 0;
prtd->periods++;
prtd->periods %= runtime->periods;
pr_debug("%s: irq per %d offset %x\n", __func__, prtd->periods, offset);
/*
* If we are getting a callback for an active stream then we inform
* the PCM middle layer we've finished a period
*/
if (prtd->active)
snd_pcm_period_elapsed(substream);
/*
* Trig next DMA transfer
*/
dma_new_period(substream);
}
/**
* This function configures the hardware to allow audio
* playback operations. It is called by ALSA framework.
*
* @param substream pointer to the structure of the current stream.
*
* @return 0 on success, -1 otherwise.
*/
static int
snd_mx1_mx2_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
prtd->period = 0;
prtd->periods = 0;
return 0;
}
static int mx1_mx2_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int ret;
ret = snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
if (ret < 0) {
printk(KERN_ERR "%s: Error %d failed to malloc pcm pages \n",
__func__, ret);
return ret;
}
pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_addr 0x(%x)\n",
__func__, (unsigned int)runtime->dma_addr);
pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_area 0x(%x)\n",
__func__, (unsigned int)runtime->dma_area);
pr_debug("%s: snd_imx1_mx2_audio_hw_params runtime->dma_bytes 0x(%x)\n",
__func__, (unsigned int)runtime->dma_bytes);
return ret;
}
static int mx1_mx2_pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
imx_dma_free(prtd->dma_ch);
snd_pcm_lib_free_pages(substream);
return 0;
}
static int mx1_mx2_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct mx1_mx2_runtime_data *prtd = substream->runtime->private_data;
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
prtd->tx_spin = 0;
/* requested stream startup */
prtd->active = 1;
pr_debug("%s: starting dma_new_period\n", __func__);
ret = dma_new_period(substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
/* requested stream shutdown */
pr_debug("%s: stopping dma transfer\n", __func__);
ret = audio_stop_dma(substream);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static snd_pcm_uframes_t
mx1_mx2_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
unsigned int offset = 0;
/* tx_spin value is used here to check if a transfer is active */
if (prtd->tx_spin) {
offset = (runtime->period_size * (prtd->periods)) +
(runtime->period_size >> 1);
if (offset >= runtime->buffer_size)
offset = runtime->period_size >> 1;
} else {
offset = (runtime->period_size * (prtd->periods));
if (offset >= runtime->buffer_size)
offset = 0;
}
pr_debug("%s: pointer offset %x\n", __func__, offset);
return offset;
}
static int mx1_mx2_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct mx1_mx2_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
int ret;
snd_soc_set_runtime_hwparams(substream, &mx1_mx2_pcm_hardware);
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
return ret;
prtd = kzalloc(sizeof(struct mx1_mx2_runtime_data), GFP_KERNEL);
if (prtd == NULL) {
ret = -ENOMEM;
goto out;
}
runtime->private_data = prtd;
if (!dma_data)
return -ENODEV;
prtd->dma_params = dma_data;
pr_debug("%s: Requesting dma channel (%s)\n", __func__,
prtd->dma_params->name);
ret = imx_dma_request_by_prio(prtd->dma_params->name, DMA_PRIO_HIGH);
if (ret < 0) {
printk(KERN_ERR "Error %d requesting dma channel\n", ret);
return ret;
}
prtd->dma_ch = ret;
imx_dma_config_burstlen(prtd->dma_ch,
prtd->dma_params->watermark_level);
ret = imx_dma_config_channel(prtd->dma_ch,
prtd->dma_params->per_config,
prtd->dma_params->mem_config,
prtd->dma_params->event_id, 0);
if (ret) {
pr_debug(KERN_ERR "Error %d configuring dma channel %d\n",
ret, prtd->dma_ch);
return ret;
}
pr_debug("%s: Setting tx dma callback function\n", __func__);
ret = imx_dma_setup_handlers(prtd->dma_ch,
audio_dma_irq, NULL,
(void *)substream);
if (ret < 0) {
printk(KERN_ERR "Error %d setting dma callback function\n", ret);
return ret;
}
return 0;
out:
return ret;
}
static int mx1_mx2_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct mx1_mx2_runtime_data *prtd = runtime->private_data;
kfree(prtd);
return 0;
}
static int mx1_mx2_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);
}
static struct snd_pcm_ops mx1_mx2_pcm_ops = {
.open = mx1_mx2_pcm_open,
.close = mx1_mx2_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = mx1_mx2_pcm_hw_params,
.hw_free = mx1_mx2_pcm_hw_free,
.prepare = snd_mx1_mx2_prepare,
.trigger = mx1_mx2_pcm_trigger,
.pointer = mx1_mx2_pcm_pointer,
.mmap = mx1_mx2_pcm_mmap,
};
static u64 mx1_mx2_pcm_dmamask = 0xffffffff;
static int mx1_mx2_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 = mx1_mx2_pcm_hardware.buffer_bytes_max;
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = pcm->card->dev;
buf->private_data = NULL;
/* Reserve uncached-buffered memory area for DMA */
buf->area = dma_alloc_writecombine(pcm->card->dev, size,
&buf->addr, GFP_KERNEL);
pr_debug("%s: preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
__func__, (void *) buf->area, (void *) buf->addr, size);
if (!buf->area)
return -ENOMEM;
buf->bytes = size;
return 0;
}
static void mx1_mx2_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;
}
}
static int mx1_mx2_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 = &mx1_mx2_pcm_dmamask;
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = 0xffffffff;
if (dai->playback.channels_min) {
ret = mx1_mx2_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
pr_debug("%s: preallocate playback buffer\n", __func__);
if (ret)
goto out;
}
if (dai->capture.channels_min) {
ret = mx1_mx2_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
pr_debug("%s: preallocate capture buffer\n", __func__);
if (ret)
goto out;
}
out:
return ret;
}
struct snd_soc_platform mx1_mx2_soc_platform = {
.name = "mx1_mx2-audio",
.pcm_ops = &mx1_mx2_pcm_ops,
.pcm_new = mx1_mx2_pcm_new,
.pcm_free = mx1_mx2_pcm_free_dma_buffers,
};
EXPORT_SYMBOL_GPL(mx1_mx2_soc_platform);
static int __init mx1_mx2_soc_platform_init(void)
{
return snd_soc_register_platform(&mx1_mx2_soc_platform);
}
module_init(mx1_mx2_soc_platform_init);
static void __exit mx1_mx2_soc_platform_exit(void)
{
snd_soc_unregister_platform(&mx1_mx2_soc_platform);
}
module_exit(mx1_mx2_soc_platform_exit);
MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com");
MODULE_DESCRIPTION("Freescale i.MX2x, i.MX1x PCM DMA module");
MODULE_LICENSE("GPL");

26
sound/soc/imx/mx1_mx2-pcm.h
View File

@ -1,26 +0,0 @@
/*
* mx1_mx2-pcm.h :- ASoC platform header for Freescale i.MX1x, i.MX2x
*
* 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 _MX1_MX2_PCM_H
#define _MX1_MX2_PCM_H
/* DMA information for mx1_mx2 platforms */
struct mx1_mx2_pcm_dma_params {
char *name; /* stream identifier */
unsigned int transfer_type; /* READ or WRITE DMA transfer */
dma_addr_t per_address; /* physical address of SSI fifo */
int event_id; /* fixed DMA number for SSI fifo */
int watermark_level; /* SSI fifo watermark level */
int per_config; /* DMA Config flags for peripheral */
int mem_config; /* DMA Config flags for RAM */
};
/* platform data */
extern struct snd_soc_platform mx1_mx2_soc_platform;
#endif

318
sound/soc/imx/mx27vis_wm8974.c
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@ -1,318 +0,0 @@
/*
* mx27vis_wm8974.c -- SoC audio for mx27vis
*
* Copyright 2009 Vista Silicon S.L.
* Author: Javier Martin
* javier.martin@vista-silicon.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.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "../codecs/wm8974.h"
#include "mx1_mx2-pcm.h"
#include "mxc-ssi.h"
#include <mach/gpio.h>
#include <mach/iomux.h>
#define IGNORED_ARG 0
static struct snd_soc_card mx27vis;
/**
* This function connects SSI1 (HPCR1) as slave to
* SSI1 external signals (PPCR1)
* As slave, HPCR1 must set TFSDIR and TCLKDIR as inputs from
* port 4
*/
void audmux_connect_1_4(void)
{
pr_debug("AUDMUX: normal operation mode\n");
/* Reset HPCR1 and PPCR1 */
DAM_HPCR1 = 0x00000000;
DAM_PPCR1 = 0x00000000;
/* set to synchronous */
DAM_HPCR1 |= AUDMUX_HPCR_SYN;
DAM_PPCR1 |= AUDMUX_PPCR_SYN;
/* set Rx sources 1 <--> 4 */
DAM_HPCR1 |= AUDMUX_HPCR_RXDSEL(3); /* port 4 */
DAM_PPCR1 |= AUDMUX_PPCR_RXDSEL(0); /* port 1 */
/* set Tx frame and Clock direction and source 4 --> 1 output */
DAM_HPCR1 |= AUDMUX_HPCR_TFSDIR | AUDMUX_HPCR_TCLKDIR;
DAM_HPCR1 |= AUDMUX_HPCR_TFCSEL(3); /* TxDS and TxCclk from port 4 */
return;
}
static int mx27vis_hifi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
unsigned int pll_out = 0, bclk = 0, fmt = 0, mclk = 0;
int ret = 0;
/*
* The WM8974 is better at generating accurate audio clocks than the
* MX27 SSI controller, so we will use it as master when we can.
*/
switch (params_rate(params)) {
case 8000:
fmt = SND_SOC_DAIFMT_CBM_CFM;
mclk = WM8974_MCLKDIV_12;
pll_out = 24576000;
break;
case 16000:
fmt = SND_SOC_DAIFMT_CBM_CFM;
pll_out = 12288000;
break;
case 48000:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_4;
pll_out = 12288000;
break;
case 96000:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_2;
pll_out = 12288000;
break;
case 11025:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_16;
pll_out = 11289600;
break;
case 22050:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_8;
pll_out = 11289600;
break;
case 44100:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_4;
mclk = WM8974_MCLKDIV_2;
pll_out = 11289600;
break;
case 88200:
fmt = SND_SOC_DAIFMT_CBM_CFM;
bclk = WM8974_BCLKDIV_2;
pll_out = 11289600;
break;
}
/* set codec DAI configuration */
ret = codec_dai->ops->set_fmt(codec_dai,
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
SND_SOC_DAIFMT_SYNC | fmt);
if (ret < 0) {
printk(KERN_ERR "Error from codec DAI configuration\n");
return ret;
}
/* set cpu DAI configuration */
ret = cpu_dai->ops->set_fmt(cpu_dai,
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_SYNC | fmt);
if (ret < 0) {
printk(KERN_ERR "Error from cpu DAI configuration\n");
return ret;
}
/* Put DC field of STCCR to 1 (not zero) */
ret = cpu_dai->ops->set_tdm_slot(cpu_dai, 0, 2);
/* set the SSI system clock as input */
ret = cpu_dai->ops->set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR "Error when setting system SSI clk\n");
return ret;
}
/* set codec BCLK division for sample rate */
ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_BCLKDIV, bclk);
if (ret < 0) {
printk(KERN_ERR "Error when setting BCLK division\n");
return ret;
}
/* codec PLL input is 25 MHz */
ret = codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, IGNORED_ARG,
25000000, pll_out);
if (ret < 0) {
printk(KERN_ERR "Error when setting PLL input\n");
return ret;
}
/*set codec MCLK division for sample rate */
ret = codec_dai->ops->set_clkdiv(codec_dai, WM8974_MCLKDIV, mclk);
if (ret < 0) {
printk(KERN_ERR "Error when setting MCLK division\n");
return ret;
}
return 0;
}
static int mx27vis_hifi_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
/* disable the PLL */
return codec_dai->ops->set_pll(codec_dai, IGNORED_ARG, IGNORED_ARG,
0, 0);
}
/*
* mx27vis WM8974 HiFi DAI opserations.
*/
static struct snd_soc_ops mx27vis_hifi_ops = {
.hw_params = mx27vis_hifi_hw_params,
.hw_free = mx27vis_hifi_hw_free,
};
static int mx27vis_suspend(struct platform_device *pdev, pm_message_t state)
{
return 0;
}
static int mx27vis_resume(struct platform_device *pdev)
{
return 0;
}
static int mx27vis_probe(struct platform_device *pdev)
{
int ret = 0;
ret = get_ssi_clk(0, &pdev->dev);
if (ret < 0) {
printk(KERN_ERR "%s: cant get ssi clock\n", __func__);
return ret;
}
return 0;
}
static int mx27vis_remove(struct platform_device *pdev)
{
put_ssi_clk(0);
return 0;
}
static struct snd_soc_dai_link mx27vis_dai[] = {
{ /* Hifi Playback*/
.name = "WM8974",
.stream_name = "WM8974 HiFi",
.cpu_dai = &imx_ssi_pcm_dai[0],
.codec_dai = &wm8974_dai,
.ops = &mx27vis_hifi_ops,
},
};
static struct snd_soc_card mx27vis = {
.name = "mx27vis",
.platform = &mx1_mx2_soc_platform,
.probe = mx27vis_probe,
.remove = mx27vis_remove,
.suspend_pre = mx27vis_suspend,
.resume_post = mx27vis_resume,
.dai_link = mx27vis_dai,
.num_links = ARRAY_SIZE(mx27vis_dai),
};
static struct snd_soc_device mx27vis_snd_devdata = {
.card = &mx27vis,
.codec_dev = &soc_codec_dev_wm8974,
};
static struct platform_device *mx27vis_snd_device;
/* Temporal definition of board specific behaviour */
void gpio_ssi_active(int ssi_num)
{
int ret = 0;
unsigned int ssi1_pins[] = {
PC20_PF_SSI1_FS,
PC21_PF_SSI1_RXD,
PC22_PF_SSI1_TXD,
PC23_PF_SSI1_CLK,
};
unsigned int ssi2_pins[] = {
PC24_PF_SSI2_FS,
PC25_PF_SSI2_RXD,
PC26_PF_SSI2_TXD,
PC27_PF_SSI2_CLK,
};
if (ssi_num == 0)
ret = mxc_gpio_setup_multiple_pins(ssi1_pins,
ARRAY_SIZE(ssi1_pins), "USB OTG");
else
ret = mxc_gpio_setup_multiple_pins(ssi2_pins,
ARRAY_SIZE(ssi2_pins), "USB OTG");
if (ret)
printk(KERN_ERR "Error requesting ssi %x pins\n", ssi_num);
}
static int __init mx27vis_init(void)
{
int ret;
mx27vis_snd_device = platform_device_alloc("soc-audio", -1);
if (!mx27vis_snd_device)
return -ENOMEM;
platform_set_drvdata(mx27vis_snd_device, &mx27vis_snd_devdata);
mx27vis_snd_devdata.dev = &mx27vis_snd_device->dev;
ret = platform_device_add(mx27vis_snd_device);
if (ret) {
printk(KERN_ERR "ASoC: Platform device allocation failed\n");
platform_device_put(mx27vis_snd_device);
}
/* WM8974 uses SSI1 (HPCR1) via AUDMUX port 4 for audio (PPCR1) */
gpio_ssi_active(0);
audmux_connect_1_4();
return ret;
}
static void __exit mx27vis_exit(void)
{
/* We should call some "ssi_gpio_inactive()" properly */
}
module_init(mx27vis_init);
module_exit(mx27vis_exit);
MODULE_AUTHOR("Javier Martin, javier.martin@vista-silicon.com");
MODULE_DESCRIPTION("ALSA SoC WM8974 mx27vis");
MODULE_LICENSE("GPL");

860
sound/soc/imx/mxc-ssi.c
View File

@ -1,860 +0,0 @@
/*
* mxc-ssi.c -- SSI driver for Freescale IMX
*
* Copyright 2006 Wolfson Microelectronics PLC.
* Author: Liam Girdwood
* liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
*
* Based on mxc-alsa-mc13783 (C) 2006 Freescale.
*
* 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.
*
* TODO:
* Need to rework SSI register defs when new defs go into mainline.
* Add support for TDM and FIFO 1.
* Add support for i.mx3x DMA interface.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <mach/dma-mx1-mx2.h>
#include <asm/mach-types.h>
#include "mxc-ssi.h"
#include "mx1_mx2-pcm.h"
#define SSI1_PORT 0
#define SSI2_PORT 1
static int ssi_active[2] = {0, 0};
/* DMA information for mx1_mx2 platforms */
static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out0 = {
.name = "SSI1 PCM Stereo out 0",
.transfer_type = DMA_MODE_WRITE,
.per_address = SSI1_BASE_ADDR + STX0,
.event_id = DMA_REQ_SSI1_TX0,
.watermark_level = TXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_out1 = {
.name = "SSI1 PCM Stereo out 1",
.transfer_type = DMA_MODE_WRITE,
.per_address = SSI1_BASE_ADDR + STX1,
.event_id = DMA_REQ_SSI1_TX1,
.watermark_level = TXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in0 = {
.name = "SSI1 PCM Stereo in 0",
.transfer_type = DMA_MODE_READ,
.per_address = SSI1_BASE_ADDR + SRX0,
.event_id = DMA_REQ_SSI1_RX0,
.watermark_level = RXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi1_pcm_stereo_in1 = {
.name = "SSI1 PCM Stereo in 1",
.transfer_type = DMA_MODE_READ,
.per_address = SSI1_BASE_ADDR + SRX1,
.event_id = DMA_REQ_SSI1_RX1,
.watermark_level = RXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out0 = {
.name = "SSI2 PCM Stereo out 0",
.transfer_type = DMA_MODE_WRITE,
.per_address = SSI2_BASE_ADDR + STX0,
.event_id = DMA_REQ_SSI2_TX0,
.watermark_level = TXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_out1 = {
.name = "SSI2 PCM Stereo out 1",
.transfer_type = DMA_MODE_WRITE,
.per_address = SSI2_BASE_ADDR + STX1,
.event_id = DMA_REQ_SSI2_TX1,
.watermark_level = TXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in0 = {
.name = "SSI2 PCM Stereo in 0",
.transfer_type = DMA_MODE_READ,
.per_address = SSI2_BASE_ADDR + SRX0,
.event_id = DMA_REQ_SSI2_RX0,
.watermark_level = RXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct mx1_mx2_pcm_dma_params imx_ssi2_pcm_stereo_in1 = {
.name = "SSI2 PCM Stereo in 1",
.transfer_type = DMA_MODE_READ,
.per_address = SSI2_BASE_ADDR + SRX1,
.event_id = DMA_REQ_SSI2_RX1,
.watermark_level = RXFIFO_WATERMARK,
.per_config = IMX_DMA_MEMSIZE_16 | IMX_DMA_TYPE_FIFO,
.mem_config = IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR,
};
static struct clk *ssi_clk0, *ssi_clk1;
int get_ssi_clk(int ssi, struct device *dev)
{
switch (ssi) {
case 0:
ssi_clk0 = clk_get(dev, "ssi1");
if (IS_ERR(ssi_clk0))
return PTR_ERR(ssi_clk0);
return 0;
case 1:
ssi_clk1 = clk_get(dev, "ssi2");
if (IS_ERR(ssi_clk1))
return PTR_ERR(ssi_clk1);
return 0;
default:
return -EINVAL;
}
}
EXPORT_SYMBOL(get_ssi_clk);
void put_ssi_clk(int ssi)
{
switch (ssi) {
case 0:
clk_put(ssi_clk0);
ssi_clk0 = NULL;
break;
case 1:
clk_put(ssi_clk1);
ssi_clk1 = NULL;
break;
}
}
EXPORT_SYMBOL(put_ssi_clk);
/*
* SSI system clock configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
u32 scr;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
scr = SSI1_SCR;
pr_debug("%s: SCR for SSI1 is %x\n", __func__, scr);
} else {
scr = SSI2_SCR;
pr_debug("%s: SCR for SSI2 is %x\n", __func__, scr);
}
if (scr & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
switch (clk_id) {
case IMX_SSP_SYS_CLK:
if (dir == SND_SOC_CLOCK_OUT) {
scr |= SSI_SCR_SYS_CLK_EN;
pr_debug("%s: clk of is output\n", __func__);
} else {
scr &= ~SSI_SCR_SYS_CLK_EN;
pr_debug("%s: clk of is input\n", __func__);
}
break;
default:
return -EINVAL;
}
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
pr_debug("%s: writeback of SSI1_SCR\n", __func__);
SSI1_SCR = scr;
} else {
pr_debug("%s: writeback of SSI2_SCR\n", __func__);
SSI2_SCR = scr;
}
return 0;
}
/*
* SSI Clock dividers
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
int div_id, int div)
{
u32 stccr, srccr;
pr_debug("%s\n", __func__);
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
if (SSI1_SCR & SSI_SCR_SSIEN)
return 0;
srccr = SSI1_STCCR;
stccr = SSI1_STCCR;
} else {
if (SSI2_SCR & SSI_SCR_SSIEN)
return 0;
srccr = SSI2_STCCR;
stccr = SSI2_STCCR;
}
switch (div_id) {
case IMX_SSI_TX_DIV_2:
stccr &= ~SSI_STCCR_DIV2;
stccr |= div;
break;
case IMX_SSI_TX_DIV_PSR:
stccr &= ~SSI_STCCR_PSR;
stccr |= div;
break;
case IMX_SSI_TX_DIV_PM:
stccr &= ~0xff;
stccr |= SSI_STCCR_PM(div);
break;
case IMX_SSI_RX_DIV_2:
stccr &= ~SSI_STCCR_DIV2;
stccr |= div;
break;
case IMX_SSI_RX_DIV_PSR:
stccr &= ~SSI_STCCR_PSR;
stccr |= div;
break;
case IMX_SSI_RX_DIV_PM:
stccr &= ~0xff;
stccr |= SSI_STCCR_PM(div);
break;
default:
return -EINVAL;
}
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
SSI1_STCCR = stccr;
SSI1_SRCCR = srccr;
} else {
SSI2_STCCR = stccr;
SSI2_SRCCR = srccr;
}
return 0;
}
/*
* SSI Network Mode or TDM slots configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
*/
static int imx_ssi_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
unsigned int mask, int slots)
{
u32 stmsk, srmsk, stccr;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
if (SSI1_SCR & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
stccr = SSI1_STCCR;
} else {
if (SSI2_SCR & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
stccr = SSI2_STCCR;
}
stmsk = srmsk = mask;
stccr &= ~SSI_STCCR_DC_MASK;
stccr |= SSI_STCCR_DC(slots - 1);
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
SSI1_STMSK = stmsk;
SSI1_SRMSK = srmsk;
SSI1_SRCCR = SSI1_STCCR = stccr;
} else {
SSI2_STMSK = stmsk;
SSI2_SRMSK = srmsk;
SSI2_SRCCR = SSI2_STCCR = stccr;
}
return 0;
}
/*
* SSI DAI format configuration.
* Should only be called when port is inactive (i.e. SSIEN = 0).
* Note: We don't use the I2S modes but instead manually configure the
* SSI for I2S.
*/
static int imx_ssi_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
u32 stcr = 0, srcr = 0, scr;
/*
* This is done to avoid this function to modify
* previous set values in stcr
*/
stcr = SSI1_STCR;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
scr = SSI1_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET);
else
scr = SSI2_SCR & ~(SSI_SCR_SYN | SSI_SCR_NET);
if (scr & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
/* DAI mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/* data on rising edge of bclk, frame low 1clk before data */
stcr |= SSI_STCR_TFSI | SSI_STCR_TEFS | SSI_STCR_TXBIT0;
srcr |= SSI_SRCR_RFSI | SSI_SRCR_REFS | SSI_SRCR_RXBIT0;
break;
case SND_SOC_DAIFMT_LEFT_J:
/* data on rising edge of bclk, frame high with data */
stcr |= SSI_STCR_TXBIT0;
srcr |= SSI_SRCR_RXBIT0;
break;
case SND_SOC_DAIFMT_DSP_B:
/* data on rising edge of bclk, frame high with data */
stcr |= SSI_STCR_TFSL;
srcr |= SSI_SRCR_RFSL;
break;
case SND_SOC_DAIFMT_DSP_A:
/* data on rising edge of bclk, frame high 1clk before data */
stcr |= SSI_STCR_TFSL | SSI_STCR_TEFS;
srcr |= SSI_SRCR_RFSL | SSI_SRCR_REFS;
break;
}
/* DAI clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
stcr |= SSI_STCR_TFSI;
stcr &= ~SSI_STCR_TSCKP;
srcr |= SSI_SRCR_RFSI;
srcr &= ~SSI_SRCR_RSCKP;
break;
case SND_SOC_DAIFMT_IB_NF:
stcr &= ~(SSI_STCR_TSCKP | SSI_STCR_TFSI);
srcr &= ~(SSI_SRCR_RSCKP | SSI_SRCR_RFSI);
break;
case SND_SOC_DAIFMT_NB_IF:
stcr |= SSI_STCR_TFSI | SSI_STCR_TSCKP;
srcr |= SSI_SRCR_RFSI | SSI_SRCR_RSCKP;
break;
case SND_SOC_DAIFMT_NB_NF:
stcr &= ~SSI_STCR_TFSI;
stcr |= SSI_STCR_TSCKP;
srcr &= ~SSI_SRCR_RFSI;
srcr |= SSI_SRCR_RSCKP;
break;
}
/* DAI clock master masks */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
stcr |= SSI_STCR_TFDIR | SSI_STCR_TXDIR;
srcr |= SSI_SRCR_RFDIR | SSI_SRCR_RXDIR;
break;
case SND_SOC_DAIFMT_CBM_CFS:
stcr |= SSI_STCR_TFDIR;
srcr |= SSI_SRCR_RFDIR;
break;
case SND_SOC_DAIFMT_CBS_CFM:
stcr |= SSI_STCR_TXDIR;
srcr |= SSI_SRCR_RXDIR;
break;
}
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
SSI1_STCR = stcr;
SSI1_SRCR = srcr;
SSI1_SCR = scr;
} else {
SSI2_STCR = stcr;
SSI2_SRCR = srcr;
SSI2_SCR = scr;
}
return 0;
}
static int imx_ssi_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* set up TX DMA params */
switch (cpu_dai->id) {
case IMX_DAI_SSI0:
cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out0;
break;
case IMX_DAI_SSI1:
cpu_dai->dma_data = &imx_ssi1_pcm_stereo_out1;
break;
case IMX_DAI_SSI2:
cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out0;
break;
case IMX_DAI_SSI3:
cpu_dai->dma_data = &imx_ssi2_pcm_stereo_out1;
}
pr_debug("%s: (playback)\n", __func__);
} else {
/* set up RX DMA params */
switch (cpu_dai->id) {
case IMX_DAI_SSI0:
cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in0;
break;
case IMX_DAI_SSI1:
cpu_dai->dma_data = &imx_ssi1_pcm_stereo_in1;
break;
case IMX_DAI_SSI2:
cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in0;
break;
case IMX_DAI_SSI3:
cpu_dai->dma_data = &imx_ssi2_pcm_stereo_in1;
}
pr_debug("%s: (capture)\n", __func__);
}
/*
* we cant really change any SSI values after SSI is enabled
* need to fix in software for max flexibility - lrg
*/
if (cpu_dai->active) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
/* reset the SSI port - Sect 45.4.4 */
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
if (!ssi_clk0)
return -EINVAL;
if (ssi_active[SSI1_PORT]++) {
pr_debug("%s: exit before reset\n", __func__);
return 0;
}
/* SSI1 Reset */
SSI1_SCR = 0;
SSI1_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
} else {
if (!ssi_clk1)
return -EINVAL;
if (ssi_active[SSI2_PORT]++) {
pr_debug("%s: exit before reset\n", __func__);
return 0;
}
/* SSI2 Reset */
SSI2_SCR = 0;
SSI2_SFCSR = SSI_SFCSR_RFWM1(RXFIFO_WATERMARK) |
SSI_SFCSR_RFWM0(RXFIFO_WATERMARK) |
SSI_SFCSR_TFWM1(TXFIFO_WATERMARK) |
SSI_SFCSR_TFWM0(TXFIFO_WATERMARK);
}
return 0;
}
int imx_ssi_hw_tx_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
u32 stccr, stcr, sier;
pr_debug("%s\n", __func__);
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
stccr = SSI1_STCCR & ~SSI_STCCR_WL_MASK;
stcr = SSI1_STCR;
sier = SSI1_SIER;
} else {
stccr = SSI2_STCCR & ~SSI_STCCR_WL_MASK;
stcr = SSI2_STCR;
sier = SSI2_SIER;
}
/* DAI data (word) size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
stccr |= SSI_STCCR_WL(16);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
stccr |= SSI_STCCR_WL(20);
break;
case SNDRV_PCM_FORMAT_S24_LE:
stccr |= SSI_STCCR_WL(24);
break;
}
/* enable interrupts */
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
stcr |= SSI_STCR_TFEN0;
else
stcr |= SSI_STCR_TFEN1;
sier |= SSI_SIER_TDMAE;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
SSI1_STCR = stcr;
SSI1_STCCR = stccr;
SSI1_SIER = sier;
} else {
SSI2_STCR = stcr;
SSI2_STCCR = stccr;
SSI2_SIER = sier;
}
return 0;
}
int imx_ssi_hw_rx_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
u32 srccr, srcr, sier;
pr_debug("%s\n", __func__);
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
srccr = SSI1_SRCCR & ~SSI_SRCCR_WL_MASK;
srcr = SSI1_SRCR;
sier = SSI1_SIER;
} else {
srccr = SSI2_SRCCR & ~SSI_SRCCR_WL_MASK;
srcr = SSI2_SRCR;
sier = SSI2_SIER;
}
/* DAI data (word) size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
srccr |= SSI_SRCCR_WL(16);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
srccr |= SSI_SRCCR_WL(20);
break;
case SNDRV_PCM_FORMAT_S24_LE:
srccr |= SSI_SRCCR_WL(24);
break;
}
/* enable interrupts */
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
srcr |= SSI_SRCR_RFEN0;
else
srcr |= SSI_SRCR_RFEN1;
sier |= SSI_SIER_RDMAE;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
SSI1_SRCR = srcr;
SSI1_SRCCR = srccr;
SSI1_SIER = sier;
} else {
SSI2_SRCR = srcr;
SSI2_SRCCR = srccr;
SSI2_SIER = sier;
}
return 0;
}
/*
* Should only be called when port is inactive (i.e. SSIEN = 0),
* although can be called multiple times by upper layers.
*/
int imx_ssi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int ret;
/* cant change any parameters when SSI is running */
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
if (SSI1_SCR & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
} else {
if (SSI2_SCR & SSI_SCR_SSIEN) {
printk(KERN_WARNING "Warning ssi already enabled\n");
return 0;
}
}
/*
* Configure both tx and rx params with the same settings. This is
* really a harware restriction because SSI must be disabled until
* we can change those values. If there is an active audio stream in
* one direction, enabling the other direction with different
* settings would mean disturbing the running one.
*/
ret = imx_ssi_hw_tx_params(substream, params);
if (ret < 0)
return ret;
return imx_ssi_hw_rx_params(substream, params);
}
int imx_ssi_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int ret;
pr_debug("%s\n", __func__);
/* Enable clks here to follow SSI recommended init sequence */
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2) {
ret = clk_enable(ssi_clk0);
if (ret < 0)
printk(KERN_ERR "Unable to enable ssi_clk0\n");
} else {
ret = clk_enable(ssi_clk1);
if (ret < 0)
printk(KERN_ERR "Unable to enable ssi_clk1\n");
}
return 0;
}
static int imx_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
u32 scr;
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
scr = SSI1_SCR;
else
scr = SSI2_SCR;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
scr |= SSI_SCR_TE | SSI_SCR_SSIEN;
else
scr |= SSI_SCR_RE | SSI_SCR_SSIEN;
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
scr &= ~SSI_SCR_TE;
else
scr &= ~SSI_SCR_RE;
break;
default:
return -EINVAL;
}
if (cpu_dai->id == IMX_DAI_SSI0 || cpu_dai->id == IMX_DAI_SSI2)
SSI1_SCR = scr;
else
SSI2_SCR = scr;
return 0;
}
static void imx_ssi_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
/* shutdown SSI if neither Tx or Rx is active */
if (!cpu_dai->active) {
if (cpu_dai->id == IMX_DAI_SSI0 ||
cpu_dai->id == IMX_DAI_SSI2) {
if (--ssi_active[SSI1_PORT] > 1)
return;
SSI1_SCR = 0;
clk_disable(ssi_clk0);
} else {
if (--ssi_active[SSI2_PORT])
return;
SSI2_SCR = 0;
clk_disable(ssi_clk1);
}
}
}
#ifdef CONFIG_PM
static int imx_ssi_suspend(struct platform_device *dev,
struct snd_soc_dai *dai)
{
return 0;
}
static int imx_ssi_resume(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
return 0;
}
#else
#define imx_ssi_suspend NULL
#define imx_ssi_resume NULL
#endif
#define IMX_SSI_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 IMX_SSI_BITS \
(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE)
static struct snd_soc_dai_ops imx_ssi_pcm_dai_ops = {
.startup = imx_ssi_startup,
.shutdown = imx_ssi_shutdown,
.trigger = imx_ssi_trigger,
.prepare = imx_ssi_prepare,
.hw_params = imx_ssi_hw_params,
.set_sysclk = imx_ssi_set_dai_sysclk,
.set_clkdiv = imx_ssi_set_dai_clkdiv,
.set_fmt = imx_ssi_set_dai_fmt,
.set_tdm_slot = imx_ssi_set_dai_tdm_slot,
};
struct snd_soc_dai imx_ssi_pcm_dai[] = {
{
.name = "imx-i2s-1-0",
.id = IMX_DAI_SSI0,
.suspend = imx_ssi_suspend,
.resume = imx_ssi_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.ops = &imx_ssi_pcm_dai_ops,
},
{
.name = "imx-i2s-2-0",
.id = IMX_DAI_SSI1,
.playback = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.ops = &imx_ssi_pcm_dai_ops,
},
{
.name = "imx-i2s-1-1",
.id = IMX_DAI_SSI2,
.suspend = imx_ssi_suspend,
.resume = imx_ssi_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.ops = &imx_ssi_pcm_dai_ops,
},
{
.name = "imx-i2s-2-1",
.id = IMX_DAI_SSI3,
.playback = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.formats = IMX_SSI_BITS,
.rates = IMX_SSI_RATES,},
.ops = &imx_ssi_pcm_dai_ops,
},
};
EXPORT_SYMBOL_GPL(imx_ssi_pcm_dai);
static int __init imx_ssi_init(void)
{
return snd_soc_register_dais(imx_ssi_pcm_dai,
ARRAY_SIZE(imx_ssi_pcm_dai));
}
static void __exit imx_ssi_exit(void)
{
snd_soc_unregister_dais(imx_ssi_pcm_dai,
ARRAY_SIZE(imx_ssi_pcm_dai));
}
module_init(imx_ssi_init);
module_exit(imx_ssi_exit);
MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com");
MODULE_DESCRIPTION("i.MX ASoC I2S driver");
MODULE_LICENSE("GPL");

238
sound/soc/imx/mxc-ssi.h
View File

@ -1,238 +0,0 @@
/*
* 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 _IMX_SSI_H
#define _IMX_SSI_H
#include <mach/hardware.h>
/* SSI regs definition - MOVE to /arch/arm/plat-mxc/include/mach/ when stable */
#define SSI1_IO_BASE_ADDR IO_ADDRESS(SSI1_BASE_ADDR)
#define SSI2_IO_BASE_ADDR IO_ADDRESS(SSI2_BASE_ADDR)
#define STX0 0x00
#define STX1 0x04
#define SRX0 0x08
#define SRX1 0x0c
#define SCR 0x10
#define SISR 0x14
#define SIER 0x18
#define STCR 0x1c
#define SRCR 0x20
#define STCCR 0x24
#define SRCCR 0x28
#define SFCSR 0x2c
#define STR 0x30
#define SOR 0x34
#define SACNT 0x38
#define SACADD 0x3c
#define SACDAT 0x40
#define SATAG 0x44
#define STMSK 0x48
#define SRMSK 0x4c
#define SSI1_STX0 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STX0)))
#define SSI1_STX1 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STX1)))
#define SSI1_SRX0 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRX0)))
#define SSI1_SRX1 (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRX1)))
#define SSI1_SCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SCR)))
#define SSI1_SISR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SISR)))
#define SSI1_SIER (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SIER)))
#define SSI1_STCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STCR)))
#define SSI1_SRCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRCR)))
#define SSI1_STCCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STCCR)))
#define SSI1_SRCCR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRCCR)))
#define SSI1_SFCSR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SFCSR)))
#define SSI1_STR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STR)))
#define SSI1_SOR (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SOR)))
#define SSI1_SACNT (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACNT)))
#define SSI1_SACADD (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACADD)))
#define SSI1_SACDAT (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SACDAT)))
#define SSI1_SATAG (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SATAG)))
#define SSI1_STMSK (*((volatile u32 *)(SSI1_IO_BASE_ADDR + STMSK)))
#define SSI1_SRMSK (*((volatile u32 *)(SSI1_IO_BASE_ADDR + SRMSK)))
#define SSI2_STX0 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STX0)))
#define SSI2_STX1 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STX1)))
#define SSI2_SRX0 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRX0)))
#define SSI2_SRX1 (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRX1)))
#define SSI2_SCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SCR)))
#define SSI2_SISR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SISR)))
#define SSI2_SIER (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SIER)))
#define SSI2_STCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STCR)))
#define SSI2_SRCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRCR)))
#define SSI2_STCCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STCCR)))
#define SSI2_SRCCR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRCCR)))
#define SSI2_SFCSR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SFCSR)))
#define SSI2_STR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STR)))
#define SSI2_SOR (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SOR)))
#define SSI2_SACNT (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACNT)))
#define SSI2_SACADD (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACADD)))
#define SSI2_SACDAT (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SACDAT)))
#define SSI2_SATAG (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SATAG)))
#define SSI2_STMSK (*((volatile u32 *)(SSI2_IO_BASE_ADDR + STMSK)))
#define SSI2_SRMSK (*((volatile u32 *)(SSI2_IO_BASE_ADDR + SRMSK)))
#define SSI_SCR_CLK_IST (1 << 9)
#define SSI_SCR_TCH_EN (1 << 8)
#define SSI_SCR_SYS_CLK_EN (1 << 7)
#define SSI_SCR_I2S_MODE_NORM (0 << 5)
#define SSI_SCR_I2S_MODE_MSTR (1 << 5)
#define SSI_SCR_I2S_MODE_SLAVE (2 << 5)
#define SSI_SCR_SYN (1 << 4)
#define SSI_SCR_NET (1 << 3)
#define SSI_SCR_RE (1 << 2)
#define SSI_SCR_TE (1 << 1)
#define SSI_SCR_SSIEN (1 << 0)
#define SSI_SISR_CMDAU (1 << 18)
#define SSI_SISR_CMDDU (1 << 17)
#define SSI_SISR_RXT (1 << 16)
#define SSI_SISR_RDR1 (1 << 15)
#define SSI_SISR_RDR0 (1 << 14)
#define SSI_SISR_TDE1 (1 << 13)
#define SSI_SISR_TDE0 (1 << 12)
#define SSI_SISR_ROE1 (1 << 11)
#define SSI_SISR_ROE0 (1 << 10)
#define SSI_SISR_TUE1 (1 << 9)
#define SSI_SISR_TUE0 (1 << 8)
#define SSI_SISR_TFS (1 << 7)
#define SSI_SISR_RFS (1 << 6)
#define SSI_SISR_TLS (1 << 5)
#define SSI_SISR_RLS (1 << 4)
#define SSI_SISR_RFF1 (1 << 3)
#define SSI_SISR_RFF0 (1 << 2)
#define SSI_SISR_TFE1 (1 << 1)
#define SSI_SISR_TFE0 (1 << 0)
#define SSI_SIER_RDMAE (1 << 22)
#define SSI_SIER_RIE (1 << 21)
#define SSI_SIER_TDMAE (1 << 20)
#define SSI_SIER_TIE (1 << 19)
#define SSI_SIER_CMDAU_EN (1 << 18)
#define SSI_SIER_CMDDU_EN (1 << 17)
#define SSI_SIER_RXT_EN (1 << 16)
#define SSI_SIER_RDR1_EN (1 << 15)
#define SSI_SIER_RDR0_EN (1 << 14)
#define SSI_SIER_TDE1_EN (1 << 13)
#define SSI_SIER_TDE0_EN (1 << 12)
#define SSI_SIER_ROE1_EN (1 << 11)
#define SSI_SIER_ROE0_EN (1 << 10)
#define SSI_SIER_TUE1_EN (1 << 9)
#define SSI_SIER_TUE0_EN (1 << 8)
#define SSI_SIER_TFS_EN (1 << 7)
#define SSI_SIER_RFS_EN (1 << 6)
#define SSI_SIER_TLS_EN (1 << 5)
#define SSI_SIER_RLS_EN (1 << 4)
#define SSI_SIER_RFF1_EN (1 << 3)
#define SSI_SIER_RFF0_EN (1 << 2)
#define SSI_SIER_TFE1_EN (1 << 1)
#define SSI_SIER_TFE0_EN (1 << 0)
#define SSI_STCR_TXBIT0 (1 << 9)
#define SSI_STCR_TFEN1 (1 << 8)
#define SSI_STCR_TFEN0 (1 << 7)
#define SSI_STCR_TFDIR (1 << 6)
#define SSI_STCR_TXDIR (1 << 5)
#define SSI_STCR_TSHFD (1 << 4)
#define SSI_STCR_TSCKP (1 << 3)
#define SSI_STCR_TFSI (1 << 2)
#define SSI_STCR_TFSL (1 << 1)
#define SSI_STCR_TEFS (1 << 0)
#define SSI_SRCR_RXBIT0 (1 << 9)
#define SSI_SRCR_RFEN1 (1 << 8)
#define SSI_SRCR_RFEN0 (1 << 7)
#define SSI_SRCR_RFDIR (1 << 6)
#define SSI_SRCR_RXDIR (1 << 5)
#define SSI_SRCR_RSHFD (1 << 4)
#define SSI_SRCR_RSCKP (1 << 3)
#define SSI_SRCR_RFSI (1 << 2)
#define SSI_SRCR_RFSL (1 << 1)
#define SSI_SRCR_REFS (1 << 0)
#define SSI_STCCR_DIV2 (1 << 18)
#define SSI_STCCR_PSR (1 << 15)
#define SSI_STCCR_WL(x) ((((x) - 2) >> 1) << 13)
#define SSI_STCCR_DC(x) (((x) & 0x1f) << 8)
#define SSI_STCCR_PM(x) (((x) & 0xff) << 0)
#define SSI_STCCR_WL_MASK (0xf << 13)
#define SSI_STCCR_DC_MASK (0x1f << 8)
#define SSI_STCCR_PM_MASK (0xff << 0)
#define SSI_SRCCR_DIV2 (1 << 18)
#define SSI_SRCCR_PSR (1 << 15)
#define SSI_SRCCR_WL(x) ((((x) - 2) >> 1) << 13)
#define SSI_SRCCR_DC(x) (((x) & 0x1f) << 8)
#define SSI_SRCCR_PM(x) (((x) & 0xff) << 0)
#define SSI_SRCCR_WL_MASK (0xf << 13)
#define SSI_SRCCR_DC_MASK (0x1f << 8)
#define SSI_SRCCR_PM_MASK (0xff << 0)
#define SSI_SFCSR_RFCNT1(x) (((x) & 0xf) << 28)
#define SSI_SFCSR_TFCNT1(x) (((x) & 0xf) << 24)
#define SSI_SFCSR_RFWM1(x) (((x) & 0xf) << 20)
#define SSI_SFCSR_TFWM1(x) (((x) & 0xf) << 16)
#define SSI_SFCSR_RFCNT0(x) (((x) & 0xf) << 12)
#define SSI_SFCSR_TFCNT0(x) (((x) & 0xf) << 8)
#define SSI_SFCSR_RFWM0(x) (((x) & 0xf) << 4)
#define SSI_SFCSR_TFWM0(x) (((x) & 0xf) << 0)
#define SSI_STR_TEST (1 << 15)
#define SSI_STR_RCK2TCK (1 << 14)
#define SSI_STR_RFS2TFS (1 << 13)
#define SSI_STR_RXSTATE(x) (((x) & 0xf) << 8)
#define SSI_STR_TXD2RXD (1 << 7)
#define SSI_STR_TCK2RCK (1 << 6)
#define SSI_STR_TFS2RFS (1 << 5)
#define SSI_STR_TXSTATE(x) (((x) & 0xf) << 0)
#define SSI_SOR_CLKOFF (1 << 6)
#define SSI_SOR_RX_CLR (1 << 5)
#define SSI_SOR_TX_CLR (1 << 4)
#define SSI_SOR_INIT (1 << 3)
#define SSI_SOR_WAIT(x) (((x) & 0x3) << 1)
#define SSI_SOR_SYNRST (1 << 0)
#define SSI_SACNT_FRDIV(x) (((x) & 0x3f) << 5)
#define SSI_SACNT_WR (x << 4)
#define SSI_SACNT_RD (x << 3)
#define SSI_SACNT_TIF (x << 2)
#define SSI_SACNT_FV (x << 1)
#define SSI_SACNT_AC97EN (x << 0)
/* Watermarks for FIFO's */
#define TXFIFO_WATERMARK 0x4
#define RXFIFO_WATERMARK 0x4
/* i.MX DAI SSP ID's */
#define IMX_DAI_SSI0 0 /* SSI1 FIFO 0 */
#define IMX_DAI_SSI1 1 /* SSI1 FIFO 1 */
#define IMX_DAI_SSI2 2 /* SSI2 FIFO 0 */
#define IMX_DAI_SSI3 3 /* SSI2 FIFO 1 */
/* SSI clock sources */
#define IMX_SSP_SYS_CLK 0
/* SSI audio dividers */
#define IMX_SSI_TX_DIV_2 0
#define IMX_SSI_TX_DIV_PSR 1
#define IMX_SSI_TX_DIV_PM 2
#define IMX_SSI_RX_DIV_2 3
#define IMX_SSI_RX_DIV_PSR 4
#define IMX_SSI_RX_DIV_PM 5
/* SSI Div 2 */
#define IMX_SSI_DIV_2_OFF (~SSI_STCCR_DIV2)
#define IMX_SSI_DIV_2_ON SSI_STCCR_DIV2
extern struct snd_soc_dai imx_ssi_pcm_dai[4];
extern int get_ssi_clk(int ssi, struct device *dev);
extern void put_ssi_clk(int ssi);
#endif