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linux/sound/soc/blackfin/bf5xx-i2s.c
Barry Song 766df6d98f ASoC: Blackfin I2S: use dai state rather than local counter 
Since the active field of the dai already tells us the stream activity,
the local counter variable is redundant and can be replaced.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2009-09-23 09:08:25 -07:00

318 lines
7.7 KiB
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/*
* File: sound/soc/blackfin/bf5xx-i2s.c
* Author: Cliff Cai <Cliff.Cai@analog.com>
*
* Created: Tue June 06 2008
* Description: Blackfin I2S CPU DAI driver
*
* Modified:
* Copyright 2008 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include "bf5xx-sport.h"
#include "bf5xx-i2s.h"
struct bf5xx_i2s_port {
u16 tcr1;
u16 rcr1;
u16 tcr2;
u16 rcr2;
int configured;
};
static struct bf5xx_i2s_port bf5xx_i2s;
static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
static struct sport_param sport_params[2] = {
{
.dma_rx_chan = CH_SPORT0_RX,
.dma_tx_chan = CH_SPORT0_TX,
.err_irq = IRQ_SPORT0_ERROR,
.regs = (struct sport_register *)SPORT0_TCR1,
},
{
.dma_rx_chan = CH_SPORT1_RX,
.dma_tx_chan = CH_SPORT1_TX,
.err_irq = IRQ_SPORT1_ERROR,
.regs = (struct sport_register *)SPORT1_TCR1,
}
};
/*
* Setting the TFS pin selector for SPORT 0 based on whether the selected
* port id F or G. If the port is F then no conflict should exist for the
* TFS. When Port G is selected and EMAC then there is a conflict between
* the PHY interrupt line and TFS. Current settings prevent the conflict
* by ignoring the TFS pin when Port G is selected. This allows both
* ssm2602 using Port G and EMAC concurrently.
*/
#ifdef CONFIG_BF527_SPORT0_PORTF
#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
#else
#define LOCAL_SPORT0_TFS (0)
#endif
static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
{P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
int ret = 0;
/* interface format:support I2S,slave mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
bf5xx_i2s.tcr1 |= TFSR | TCKFE;
bf5xx_i2s.rcr1 |= RFSR | RCKFE;
bf5xx_i2s.tcr2 |= TSFSE;
bf5xx_i2s.rcr2 |= RSFSE;
break;
case SND_SOC_DAIFMT_DSP_A:
bf5xx_i2s.tcr1 |= TFSR;
bf5xx_i2s.rcr1 |= RFSR;
break;
case SND_SOC_DAIFMT_LEFT_J:
ret = -EINVAL;
break;
default:
printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
ret = -EINVAL;
break;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
break;
case SND_SOC_DAIFMT_CBS_CFS:
case SND_SOC_DAIFMT_CBM_CFS:
case SND_SOC_DAIFMT_CBS_CFM:
ret = -EINVAL;
break;
default:
printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
ret = -EINVAL;
break;
}
return ret;
}
static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int ret = 0;
bf5xx_i2s.tcr2 &= ~0x1f;
bf5xx_i2s.rcr2 &= ~0x1f;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
bf5xx_i2s.tcr2 |= 15;
bf5xx_i2s.rcr2 |= 15;
sport_handle->wdsize = 2;
break;
case SNDRV_PCM_FORMAT_S24_LE:
bf5xx_i2s.tcr2 |= 23;
bf5xx_i2s.rcr2 |= 23;
sport_handle->wdsize = 3;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bf5xx_i2s.tcr2 |= 31;
bf5xx_i2s.rcr2 |= 31;
sport_handle->wdsize = 4;
break;
}
if (!bf5xx_i2s.configured) {
/*
* TX and RX are not independent,they are enabled at the
* same time, even if only one side is running. So, we
* need to configure both of them at the time when the first
* stream is opened.
*
* CPU DAI:slave mode.
*/
bf5xx_i2s.configured = 1;
ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
bf5xx_i2s.rcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
bf5xx_i2s.tcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
}
return 0;
}
static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
pr_debug("%s enter\n", __func__);
/* No active stream, SPORT is allowed to be configured again. */
if (!dai->active)
bf5xx_i2s.configured = 0;
}
static int bf5xx_i2s_probe(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
pr_debug("%s enter\n", __func__);
if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
pr_err("Requesting Peripherals failed\n");
return -EFAULT;
}
/* request DMA for SPORT */
sport_handle = sport_init(&sport_params[sport_num], 4, \
2 * sizeof(u32), NULL);
if (!sport_handle) {
peripheral_free_list(&sport_req[sport_num][0]);
return -ENODEV;
}
return 0;
}
static void bf5xx_i2s_remove(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
pr_debug("%s enter\n", __func__);
peripheral_free_list(&sport_req[sport_num][0]);
}
#ifdef CONFIG_PM
static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
{
pr_debug("%s : sport %d\n", __func__, dai->id);
if (dai->capture.active)
sport_rx_stop(sport_handle);
if (dai->playback.active)
sport_tx_stop(sport_handle);
return 0;
}
static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
{
int ret;
pr_debug("%s : sport %d\n", __func__, dai->id);
ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
bf5xx_i2s.rcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
bf5xx_i2s.tcr2, 0, 0);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
return 0;
}
#else
#define bf5xx_i2s_suspend NULL
#define bf5xx_i2s_resume NULL
#endif
#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
SNDRV_PCM_RATE_96000)
#define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
.shutdown = bf5xx_i2s_shutdown,
.hw_params = bf5xx_i2s_hw_params,
.set_fmt = bf5xx_i2s_set_dai_fmt,
};
struct snd_soc_dai bf5xx_i2s_dai = {
.name = "bf5xx-i2s",
.id = 0,
.probe = bf5xx_i2s_probe,
.remove = bf5xx_i2s_remove,
.suspend = bf5xx_i2s_suspend,
.resume = bf5xx_i2s_resume,
.playback = {
.channels_min = 1,
.channels_max = 2,
.rates = BF5XX_I2S_RATES,
.formats = BF5XX_I2S_FORMATS,},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = BF5XX_I2S_RATES,
.formats = BF5XX_I2S_FORMATS,},
.ops = &bf5xx_i2s_dai_ops,
};
EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
static int __init bfin_i2s_init(void)
{
return snd_soc_register_dai(&bf5xx_i2s_dai);
}
module_init(bfin_i2s_init);
static void __exit bfin_i2s_exit(void)
{
snd_soc_unregister_dai(&bf5xx_i2s_dai);
}
module_exit(bfin_i2s_exit);
/* Module information */
MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
MODULE_LICENSE("GPL");
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