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linux-sg2042/sound/soc/blackfin/bf5xx-ad73311.c

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/*
* File: sound/soc/blackfin/bf5xx-ad73311.c
* Author: Cliff Cai <Cliff.Cai@analog.com>
*
* Created: Thur Sep 25 2008
* Description: Board driver for ad73311 sound chip
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/irq.h>
#include <asm/dma.h>
#include <asm/portmux.h>
#include "../codecs/ad73311.h"
#include "bf5xx-sport.h"
#include "bf5xx-i2s-pcm.h"
#if CONFIG_SND_BF5XX_SPORT_NUM == 0
#define bfin_write_SPORT_TCR1 bfin_write_SPORT0_TCR1
#define bfin_read_SPORT_TCR1 bfin_read_SPORT0_TCR1
#define bfin_write_SPORT_TCR2 bfin_write_SPORT0_TCR2
#define bfin_write_SPORT_TX16 bfin_write_SPORT0_TX16
#define bfin_read_SPORT_STAT bfin_read_SPORT0_STAT
#else
#define bfin_write_SPORT_TCR1 bfin_write_SPORT1_TCR1
#define bfin_read_SPORT_TCR1 bfin_read_SPORT1_TCR1
#define bfin_write_SPORT_TCR2 bfin_write_SPORT1_TCR2
#define bfin_write_SPORT_TX16 bfin_write_SPORT1_TX16
#define bfin_read_SPORT_STAT bfin_read_SPORT1_STAT
#endif
#define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
static struct snd_soc_card bf5xx_ad73311;
static int snd_ad73311_startup(void)
{
pr_debug("%s enter\n", __func__);
/* Pull up SE pin on AD73311L */
gpio_set_value(GPIO_SE, 1);
return 0;
}
static int snd_ad73311_configure(void)
{
unsigned short ctrl_regs[6];
unsigned short status = 0;
int count = 0;
/* DMCLK = MCLK = 16.384 MHz
* SCLK = DMCLK/8 = 2.048 MHz
* Sample Rate = DMCLK/2048 = 8 KHz
*/
ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
REGB_SCDIV(0) | REGB_DIRATE(0);
ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
REGD_IGS(2);
ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
local_irq_disable();
snd_ad73311_startup();
udelay(1);
bfin_write_SPORT_TCR1(TFSR);
bfin_write_SPORT_TCR2(0xF);
SSYNC();
/* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
* FIFO before enable SPORT to transfer the data
*/
for (count = 0; count < 6; count++)
bfin_write_SPORT_TX16(ctrl_regs[count]);
SSYNC();
bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
SSYNC();
/* When TUVF is set, the data is already send out */
while (!(status & TUVF) && ++count < 10000) {
udelay(1);
status = bfin_read_SPORT_STAT();
SSYNC();
}
bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
SSYNC();
local_irq_enable();
if (count >= 10000) {
printk(KERN_ERR "ad73311: failed to configure codec\n");
return -1;
}
return 0;
}
static int bf5xx_probe(struct snd_soc_card *card)
{
int err;
if (gpio_request(GPIO_SE, "AD73311_SE")) {
printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
return -EBUSY;
}
gpio_direction_output(GPIO_SE, 0);
err = snd_ad73311_configure();
if (err < 0)
return -EFAULT;
return 0;
}
static int bf5xx_ad73311_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 *cpu_dai = rtd->cpu_dai;
int ret = 0;
pr_debug("%s rate %d format %x\n", __func__, params_rate(params),
params_format(params));
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops bf5xx_ad73311_ops = {
.hw_params = bf5xx_ad73311_hw_params,
};
static struct snd_soc_dai_link bf5xx_ad73311_dai[] = {
{
.name = "ad73311",
.stream_name = "AD73311",
.cpu_dai_name = "bfin-i2s.0",
.codec_dai_name = "ad73311-hifi",
.platform_name = "bfin-i2s-pcm-audio",
.codec_name = "ad73311",
.ops = &bf5xx_ad73311_ops,
},
{
.name = "ad73311",
.stream_name = "AD73311",
.cpu_dai_name = "bfin-i2s.1",
.codec_dai_name = "ad73311-hifi",
.platform_name = "bfin-i2s-pcm-audio",
.codec_name = "ad73311",
.ops = &bf5xx_ad73311_ops,
},
};
static struct snd_soc_card bf5xx_ad73311 = {
.name = "bfin-ad73311",
.probe = bf5xx_probe,
.dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM],
.num_links = 1,
};
static struct platform_device *bf5xx_ad73311_snd_device;
static int __init bf5xx_ad73311_init(void)
{
int ret;
pr_debug("%s enter\n", __func__);
bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
if (!bf5xx_ad73311_snd_device)
return -ENOMEM;
platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
ret = platform_device_add(bf5xx_ad73311_snd_device);
if (ret)
platform_device_put(bf5xx_ad73311_snd_device);
return ret;
}
static void __exit bf5xx_ad73311_exit(void)
{
pr_debug("%s enter\n", __func__);
platform_device_unregister(bf5xx_ad73311_snd_device);
}
module_init(bf5xx_ad73311_init);
module_exit(bf5xx_ad73311_exit);
/* Module information */
MODULE_AUTHOR("Cliff Cai");
MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
MODULE_LICENSE("GPL");
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