Hi
I'm trying to understand what is wrong here with this small
driver.
/* McBSP1 */
OMAP4_MUX(ABE_MCBSP1_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP4_MUX(ABE_MCBSP1_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT_PULLDOWN),
OMAP4_MUX(ABE_MCBSP1_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT |
OMAP_PULL_ENA),
OMAP4_MUX(ABE_MCBSP1_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
kernel 3.8.0
[ 107.276702] omap-mcbsp omap-mcbsp.1: Configuring McBSP1 phys_base: 0x40122000
[ 107.283691] omap-mcbsp omap-mcbsp.1: **** McBSP1 regs ****
[ 107.283721] omap-mcbsp omap-mcbsp.1: DRR2: 0x88260a09
[ 107.283721] omap-mcbsp omap-mcbsp.1: DRR1: 0x0000
[ 107.283752] omap-mcbsp omap-mcbsp.1: DXR2: 0x0000
[ 107.283752] omap-mcbsp omap-mcbsp.1: DXR1: 0x0000
[ 107.283752] omap-mcbsp omap-mcbsp.1: SPCR2: 0x0233
[ 107.283782] omap-mcbsp omap-mcbsp.1: SPCR1: 0x0030
[ 107.283782] omap-mcbsp omap-mcbsp.1: RCR2: 0x80a1
[ 107.283813] omap-mcbsp omap-mcbsp.1: RCR1: 0x00a0
[ 107.283813] omap-mcbsp omap-mcbsp.1: XCR2: 0x80a1
[ 107.283813] omap-mcbsp omap-mcbsp.1: XCR1: 0x00a0
[ 107.283843] omap-mcbsp omap-mcbsp.1: SRGR2: 0x203f
[ 107.283843] omap-mcbsp omap-mcbsp.1: SRGR1: 0x1f00
[ 107.283843] omap-mcbsp omap-mcbsp.1: PCR0: 0x008f
[ 107.283874] omap-mcbsp omap-mcbsp.1: ***********************
[ 119.926177] omap-dma-engine omap-dma-engine: freeing channel for 33
Well basically it doesn't start the transfer. The clock is provided
using the clkx pin. clkx is rate * channel * bitsxword and come from
the codec.
What is wrong? (I know that how I register the card is deprecated)
Regards Michael
/*
* dacmax.c -- SoC audio for pandaboard demokit
*
* Author: Michael Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx>
*
* Based on:
* Author: Misael Lopez Cruz <x0052729@xxxxxx>
*
* 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.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <linux/gpio.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
#include <linux/module.h>
#include "omap-mcbsp.h"
static struct snd_soc_card snd_soc_dacmax;
static int dacmax_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
int ret;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
pr_info("%s: setting the params\n", __func__);
ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKX_EXT, 0,
SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR "can't set CPU system clock " \
"OMAP_MCBSP_CLKR_SRC_CLKX\n");
}
return 0;
}
static struct snd_soc_ops dacmax_ops = {
.hw_params = dacmax_hw_params,
};
static int dacmax_init(struct snd_soc_pcm_runtime *rtd)
{
pr_info("%s: INIT\n", __func__);
return 0;
}
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link dacmax_dai = {
.name = "DACMAX-I2S",
.stream_name = "DACMAX-Audio",
.cpu_dai_name = "omap-mcbsp.1",
.codec_dai_name = "pcm1792a-hifi",
.platform_name = "omap-pcm-audio",
.codec_name = "pcm1792a",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM,
.init = dacmax_init,
.ops = &dacmax_ops,
};
/* Audio machine driver */
static struct snd_soc_card snd_soc_dacmax = {
.name = "DACMAX",
.driver_name = "OMAP4",
.long_name = "TI OMAP4 Board",
.dai_link = &dacmax_dai,
.num_links = 1,
};
static struct platform_device *dacmax_snd_device;
static int __init dacmax_soc_init(void)
{
int ret;
printk(KERN_INFO "DACMAX SoC init\n");
dacmax_snd_device = platform_device_alloc("soc-audio", -1);
if (!dacmax_snd_device) {
printk(KERN_ERR "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(dacmax_snd_device, &snd_soc_dacmax);
ret = platform_device_add(dacmax_snd_device);
if (ret)
goto err1;
return 0;
err1:
printk(KERN_ERR "Unable to add platform device\n");
platform_device_put(dacmax_snd_device);
return ret;
}
module_init(dacmax_soc_init);
static void __exit dacmax_soc_exit(void)
{
platform_device_unregister(dacmax_snd_device);
}
module_exit(dacmax_soc_exit);
MODULE_AUTHOR("Michael Trimarchi <michael@xxxxxxxxxxxxxxxxxxxx>");
MODULE_DESCRIPTION("ALSA SoC DACMAX");
MODULE_LICENSE("GPL");
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