372 lines
8.9 KiB
C
372 lines
8.9 KiB
C
/*
|
|
* File: sound/soc/blackfin/bf5xx-tdm.c
|
|
* Author: Barry Song <Barry.Song@analog.com>
|
|
*
|
|
* Created: Thurs June 04 2009
|
|
* Description: Blackfin I2S(TDM) CPU DAI driver
|
|
* Even though TDM mode can be as part of I2S DAI, but there
|
|
* are so much difference in configuration and data flow,
|
|
* it's very ugly to integrate I2S and TDM into a module
|
|
*
|
|
* Modified:
|
|
* Copyright 2009 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 <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-tdm.h"
|
|
|
|
static struct bf5xx_tdm_port bf5xx_tdm;
|
|
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
|
|
* codecs and EMAC using Port G concurrently.
|
|
*/
|
|
#ifdef CONFIG_BF527_SPORT0_PORTG
|
|
#define LOCAL_SPORT0_TFS (0)
|
|
#else
|
|
#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
|
|
#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_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
|
|
unsigned int fmt)
|
|
{
|
|
int ret = 0;
|
|
|
|
/* interface format:support TDM,slave mode */
|
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_DSP_A:
|
|
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_tdm_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
int ret = 0;
|
|
|
|
bf5xx_tdm.tcr2 &= ~0x1f;
|
|
bf5xx_tdm.rcr2 &= ~0x1f;
|
|
switch (params_format(params)) {
|
|
case SNDRV_PCM_FORMAT_S32_LE:
|
|
bf5xx_tdm.tcr2 |= 31;
|
|
bf5xx_tdm.rcr2 |= 31;
|
|
sport_handle->wdsize = 4;
|
|
break;
|
|
/* at present, we only support 32bit transfer */
|
|
default:
|
|
pr_err("not supported PCM format yet\n");
|
|
return -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (!bf5xx_tdm.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.
|
|
*/
|
|
ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1,
|
|
bf5xx_tdm.rcr2, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1,
|
|
bf5xx_tdm.tcr2, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
bf5xx_tdm.configured = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
/* No active stream, SPORT is allowed to be configured again. */
|
|
if (!dai->active)
|
|
bf5xx_tdm.configured = 0;
|
|
}
|
|
|
|
static int bf5xx_tdm_set_channel_map(struct snd_soc_dai *dai,
|
|
unsigned int tx_num, unsigned int *tx_slot,
|
|
unsigned int rx_num, unsigned int *rx_slot)
|
|
{
|
|
int i;
|
|
unsigned int slot;
|
|
unsigned int tx_mapped = 0, rx_mapped = 0;
|
|
|
|
if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
|
|
(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < tx_num; i++) {
|
|
slot = tx_slot[i];
|
|
if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
|
|
(!(tx_mapped & (1 << slot)))) {
|
|
bf5xx_tdm.tx_map[i] = slot;
|
|
tx_mapped |= 1 << slot;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
for (i = 0; i < rx_num; i++) {
|
|
slot = rx_slot[i];
|
|
if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
|
|
(!(rx_mapped & (1 << slot)))) {
|
|
bf5xx_tdm.rx_map[i] = slot;
|
|
rx_mapped |= 1 << slot;
|
|
} else
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
|
|
{
|
|
struct sport_device *sport =
|
|
(struct sport_device *)dai->private_data;
|
|
|
|
if (!dai->active)
|
|
return 0;
|
|
if (dai->capture.active)
|
|
sport_rx_stop(sport);
|
|
if (dai->playback.active)
|
|
sport_tx_stop(sport);
|
|
return 0;
|
|
}
|
|
|
|
static int bf5xx_tdm_resume(struct snd_soc_dai *dai)
|
|
{
|
|
int ret;
|
|
struct sport_device *sport =
|
|
(struct sport_device *)dai->private_data;
|
|
|
|
if (!dai->active)
|
|
return 0;
|
|
|
|
ret = sport_set_multichannel(sport, 8, 0xFF, 1);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
}
|
|
|
|
ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
}
|
|
|
|
ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
#define bf5xx_tdm_suspend NULL
|
|
#define bf5xx_tdm_resume NULL
|
|
#endif
|
|
|
|
static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
|
|
.hw_params = bf5xx_tdm_hw_params,
|
|
.set_fmt = bf5xx_tdm_set_dai_fmt,
|
|
.shutdown = bf5xx_tdm_shutdown,
|
|
.set_channel_map = bf5xx_tdm_set_channel_map,
|
|
};
|
|
|
|
struct snd_soc_dai bf5xx_tdm_dai = {
|
|
.name = "bf5xx-tdm",
|
|
.id = 0,
|
|
.suspend = bf5xx_tdm_suspend,
|
|
.resume = bf5xx_tdm_resume,
|
|
.playback = {
|
|
.channels_min = 2,
|
|
.channels_max = 8,
|
|
.rates = SNDRV_PCM_RATE_48000,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,},
|
|
.capture = {
|
|
.channels_min = 2,
|
|
.channels_max = 8,
|
|
.rates = SNDRV_PCM_RATE_48000,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,},
|
|
.ops = &bf5xx_tdm_dai_ops,
|
|
};
|
|
EXPORT_SYMBOL_GPL(bf5xx_tdm_dai);
|
|
|
|
static int __devinit bfin_tdm_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
|
|
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, \
|
|
8 * sizeof(u32), NULL);
|
|
if (!sport_handle) {
|
|
peripheral_free_list(&sport_req[sport_num][0]);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* SPORT works in TDM mode */
|
|
ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
goto sport_config_err;
|
|
}
|
|
|
|
ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
goto sport_config_err;
|
|
}
|
|
|
|
ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0);
|
|
if (ret) {
|
|
pr_err("SPORT is busy!\n");
|
|
ret = -EBUSY;
|
|
goto sport_config_err;
|
|
}
|
|
|
|
ret = snd_soc_register_dai(&bf5xx_tdm_dai);
|
|
if (ret) {
|
|
pr_err("Failed to register DAI: %d\n", ret);
|
|
goto sport_config_err;
|
|
}
|
|
|
|
sport_handle->private_data = &bf5xx_tdm;
|
|
return 0;
|
|
|
|
sport_config_err:
|
|
peripheral_free_list(&sport_req[sport_num][0]);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit bfin_tdm_remove(struct platform_device *pdev)
|
|
{
|
|
peripheral_free_list(&sport_req[sport_num][0]);
|
|
snd_soc_unregister_dai(&bf5xx_tdm_dai);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver bfin_tdm_driver = {
|
|
.probe = bfin_tdm_probe,
|
|
.remove = __devexit_p(bfin_tdm_remove),
|
|
.driver = {
|
|
.name = "bfin-tdm",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init bfin_tdm_init(void)
|
|
{
|
|
return platform_driver_register(&bfin_tdm_driver);
|
|
}
|
|
module_init(bfin_tdm_init);
|
|
|
|
static void __exit bfin_tdm_exit(void)
|
|
{
|
|
platform_driver_unregister(&bfin_tdm_driver);
|
|
}
|
|
module_exit(bfin_tdm_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Barry Song");
|
|
MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
|
|
MODULE_LICENSE("GPL");
|
|
|