i.MX pcm043: Add AC97 sound support (d2831d1f) · Commits · 戴 / test

arch/arm/mach-mx3/mach-pcm043.c

+101 −0

Original line number	Diff line number	Diff line
		@@ -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);

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