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i.MX pcm043: Add AC97 sound support 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2010-02-09 11:04:36 +01:00
parent c8a6885f21
commit d2831d1f54
1 changed files with 101 additions and 0 deletions
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101
arch/arm/mach-mx3/mach-pcm043.c
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@ -26,6 +26,7 @@
#include <linux/gpio.h>
#include <linux/smc911x.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/usb/otg.h>
@ -49,6 +50,8 @@
#include <mach/mxc_nand.h>
#include <mach/mxc_ehci.h>
#include <mach/ulpi.h>
#include <mach/audmux.h>
#include <mach/ssi.h>
#include "devices.h"
@ -213,6 +216,91 @@ static struct pad_desc pcm043_pads[] = {
/* USB host */
MX35_PAD_I2C2_CLK__USB_TOP_USBH2_PWR,
MX35_PAD_I2C2_DAT__USB_TOP_USBH2_OC,
/* SSI */
MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS,
MX35_PAD_STXD4__AUDMUX_AUD4_TXD,
MX35_PAD_SRXD4__AUDMUX_AUD4_RXD,
MX35_PAD_SCK4__AUDMUX_AUD4_TXC,
};
#define AC97_GPIO_TXFS (1 * 32 + 31)
#define AC97_GPIO_TXD (1 * 32 + 28)
#define AC97_GPIO_RESET (1 * 32 + 0)
static void pcm043_ac97_warm_reset(struct snd_ac97 *ac97)
{
struct pad_desc txfs_gpio = MX35_PAD_STXFS4__GPIO2_31;
struct pad_desc txfs = MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS;
int ret;
ret = gpio_request(AC97_GPIO_TXFS, "SSI");
if (ret) {
printk("failed to get GPIO_TXFS: %d\n", ret);
return;
}
mxc_iomux_v3_setup_pad(&txfs_gpio);
/* warm reset */
gpio_direction_output(AC97_GPIO_TXFS, 1);
udelay(2);
gpio_set_value(AC97_GPIO_TXFS, 0);
gpio_free(AC97_GPIO_TXFS);
mxc_iomux_v3_setup_pad(&txfs);
}
static void pcm043_ac97_cold_reset(struct snd_ac97 *ac97)
{
struct pad_desc txfs_gpio = MX35_PAD_STXFS4__GPIO2_31;
struct pad_desc txfs = MX35_PAD_STXFS4__AUDMUX_AUD4_TXFS;
struct pad_desc txd_gpio = MX35_PAD_STXD4__GPIO2_28;
struct pad_desc txd = MX35_PAD_STXD4__AUDMUX_AUD4_TXD;
struct pad_desc reset_gpio = MX35_PAD_SD2_CMD__GPIO2_0;
int ret;
ret = gpio_request(AC97_GPIO_TXFS, "SSI");
if (ret)
goto err1;
ret = gpio_request(AC97_GPIO_TXD, "SSI");
if (ret)
goto err2;
ret = gpio_request(AC97_GPIO_RESET, "SSI");
if (ret)
goto err3;
mxc_iomux_v3_setup_pad(&txfs_gpio);
mxc_iomux_v3_setup_pad(&txd_gpio);
mxc_iomux_v3_setup_pad(&reset_gpio);
gpio_direction_output(AC97_GPIO_TXFS, 0);
gpio_direction_output(AC97_GPIO_TXD, 0);
/* cold reset */
gpio_direction_output(AC97_GPIO_RESET, 0);
udelay(10);
gpio_direction_output(AC97_GPIO_RESET, 1);
mxc_iomux_v3_setup_pad(&txd);
mxc_iomux_v3_setup_pad(&txfs);
gpio_free(AC97_GPIO_RESET);
err3:
gpio_free(AC97_GPIO_TXD);
err2:
gpio_free(AC97_GPIO_TXFS);
err1:
if (ret)
printk("%s failed with %d\n", __func__, ret);
mdelay(1);
}
static struct imx_ssi_platform_data pcm043_ssi_pdata = {
.ac97_reset = pcm043_ac97_cold_reset,
.ac97_warm_reset = pcm043_ac97_warm_reset,
.flags = IMX_SSI_USE_AC97,
};
static struct mxc_nand_platform_data pcm037_nand_board_info = {
@ -258,10 +346,23 @@ static void __init mxc_board_init(void)
{
mxc_iomux_v3_setup_multiple_pads(pcm043_pads, ARRAY_SIZE(pcm043_pads));
mxc_audmux_v2_configure_port(3,
MXC_AUDMUX_V2_PTCR_SYN | /* 4wire mode */
MXC_AUDMUX_V2_PTCR_TFSEL(0) |
MXC_AUDMUX_V2_PTCR_TFSDIR,
MXC_AUDMUX_V2_PDCR_RXDSEL(0));
mxc_audmux_v2_configure_port(0,
MXC_AUDMUX_V2_PTCR_SYN | /* 4wire mode */
MXC_AUDMUX_V2_PTCR_TCSEL(3) |
MXC_AUDMUX_V2_PTCR_TCLKDIR, /* clock is output */
MXC_AUDMUX_V2_PDCR_RXDSEL(3));
platform_add_devices(devices, ARRAY_SIZE(devices));
mxc_register_device(&mxc_uart_device0, &uart_pdata);
mxc_register_device(&mxc_nand_device, &pcm037_nand_board_info);
mxc_register_device(&imx_ssi_device0, &pcm043_ssi_pdata);
mxc_register_device(&mxc_uart_device1, &uart_pdata);