at91sam9261_devices.c

linux 内核源代码

/*
 * arch/arm/mach-at91/at91sam9261_devices.c
 *
 *  Copyright (C) 2005 Thibaut VARENE <[e-mail]>
 *  Copyright (C) 2005 David Brownell
 *
 * 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.
 *
 */
#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <linux/platform_device.h>
#include <linux/i2c-gpio.h>

#include <linux/fb.h>
#include <video/atmel_lcdc.h>

#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91sam9261.h>
#include <asm/arch/at91sam9261_matrix.h>
#include <asm/arch/at91sam926x_mc.h>

#include "generic.h"


/* --------------------------------------------------------------------
 *  USB Host
 * -------------------------------------------------------------------- */

#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static u64 ohci_dmamask = 0xffffffffUL;
static struct at91_usbh_data usbh_data;

static struct resource usbh_resources[] = {
	[0] = {
		.start	= AT91SAM9261_UHP_BASE,
		.end	= AT91SAM9261_UHP_BASE + SZ_1M - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= AT91SAM9261_ID_UHP,
		.end	= AT91SAM9261_ID_UHP,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device at91sam9261_usbh_device = {
	.name		= "at91_ohci",
	.id		= -1,
	.dev		= {
				.dma_mask		= &ohci_dmamask,
				.coherent_dma_mask	= 0xffffffff,
				.platform_data		= &usbh_data,
	},
	.resource	= usbh_resources,
	.num_resources	= ARRAY_SIZE(usbh_resources),
};

void __init at91_add_device_usbh(struct at91_usbh_data *data)
{
	if (!data)
		return;

	usbh_data = *data;
	platform_device_register(&at91sam9261_usbh_device);
}
#else
void __init at91_add_device_usbh(struct at91_usbh_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  USB Device (Gadget)
 * -------------------------------------------------------------------- */

#ifdef CONFIG_USB_GADGET_AT91
static struct at91_udc_data udc_data;

static struct resource udc_resources[] = {
	[0] = {
		.start	= AT91SAM9261_BASE_UDP,
		.end	= AT91SAM9261_BASE_UDP + SZ_16K - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= AT91SAM9261_ID_UDP,
		.end	= AT91SAM9261_ID_UDP,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device at91sam9261_udc_device = {
	.name		= "at91_udc",
	.id		= -1,
	.dev		= {
				.platform_data		= &udc_data,
	},
	.resource	= udc_resources,
	.num_resources	= ARRAY_SIZE(udc_resources),
};

void __init at91_add_device_udc(struct at91_udc_data *data)
{
	unsigned long x;

	if (!data)
		return;

	if (data->vbus_pin) {
		at91_set_gpio_input(data->vbus_pin, 0);
		at91_set_deglitch(data->vbus_pin, 1);
	}

	/* Pullup pin is handled internally */
	x = at91_sys_read(AT91_MATRIX_USBPUCR);
	at91_sys_write(AT91_MATRIX_USBPUCR, x | AT91_MATRIX_USBPUCR_PUON);

	udc_data = *data;
	platform_device_register(&at91sam9261_udc_device);
}
#else
void __init at91_add_device_udc(struct at91_udc_data *data) {}
#endif

/* --------------------------------------------------------------------
 *  MMC / SD
 * -------------------------------------------------------------------- */

#if defined(CONFIG_MMC_AT91) || defined(CONFIG_MMC_AT91_MODULE)
static u64 mmc_dmamask = 0xffffffffUL;
static struct at91_mmc_data mmc_data;

static struct resource mmc_resources[] = {
	[0] = {
		.start	= AT91SAM9261_BASE_MCI,
		.end	= AT91SAM9261_BASE_MCI + SZ_16K - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= AT91SAM9261_ID_MCI,
		.end	= AT91SAM9261_ID_MCI,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device at91sam9261_mmc_device = {
	.name		= "at91_mci",
	.id		= -1,
	.dev		= {
				.dma_mask		= &mmc_dmamask,
				.coherent_dma_mask	= 0xffffffff,
				.platform_data		= &mmc_data,
	},
	.resource	= mmc_resources,
	.num_resources	= ARRAY_SIZE(mmc_resources),
};

void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data)
{
	if (!data)
		return;

	/* input/irq */
	if (data->det_pin) {
		at91_set_gpio_input(data->det_pin, 1);
		at91_set_deglitch(data->det_pin, 1);
	}
	if (data->wp_pin)
		at91_set_gpio_input(data->wp_pin, 1);
	if (data->vcc_pin)
		at91_set_gpio_output(data->vcc_pin, 0);

	/* CLK */
	at91_set_B_periph(AT91_PIN_PA2, 0);

	/* CMD */
	at91_set_B_periph(AT91_PIN_PA1, 1);

	/* DAT0, maybe DAT1..DAT3 */
	at91_set_B_periph(AT91_PIN_PA0, 1);
	if (data->wire4) {
		at91_set_B_periph(AT91_PIN_PA4, 1);
		at91_set_B_periph(AT91_PIN_PA5, 1);
		at91_set_B_periph(AT91_PIN_PA6, 1);
	}

	mmc_data = *data;
	platform_device_register(&at91sam9261_mmc_device);
}
#else
void __init at91_add_device_mmc(short mmc_id, struct at91_mmc_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  NAND / SmartMedia
 * -------------------------------------------------------------------- */

#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
static struct at91_nand_data nand_data;

#define NAND_BASE	AT91_CHIPSELECT_3

static struct resource nand_resources[] = {
	{
		.start	= NAND_BASE,
		.end	= NAND_BASE + SZ_256M - 1,
		.flags	= IORESOURCE_MEM,
	}
};

static struct platform_device at91_nand_device = {
	.name		= "at91_nand",
	.id		= -1,
	.dev		= {
				.platform_data	= &nand_data,
	},
	.resource	= nand_resources,
	.num_resources	= ARRAY_SIZE(nand_resources),
};

void __init at91_add_device_nand(struct at91_nand_data *data)
{
	unsigned long csa, mode;

	if (!data)
		return;

	csa = at91_sys_read(AT91_MATRIX_EBICSA);
	at91_sys_write(AT91_MATRIX_EBICSA, csa | AT91_MATRIX_CS3A_SMC);

	/* set the bus interface characteristics */
	at91_sys_write(AT91_SMC_SETUP(3), AT91_SMC_NWESETUP_(0) | AT91_SMC_NCS_WRSETUP_(0)
			| AT91_SMC_NRDSETUP_(0) | AT91_SMC_NCS_RDSETUP_(0));

	at91_sys_write(AT91_SMC_PULSE(3), AT91_SMC_NWEPULSE_(2) | AT91_SMC_NCS_WRPULSE_(5)
			| AT91_SMC_NRDPULSE_(2) | AT91_SMC_NCS_RDPULSE_(5));

	at91_sys_write(AT91_SMC_CYCLE(3), AT91_SMC_NWECYCLE_(7) | AT91_SMC_NRDCYCLE_(7));

	if (data->bus_width_16)
		mode = AT91_SMC_DBW_16;
	else
		mode = AT91_SMC_DBW_8;
	at91_sys_write(AT91_SMC_MODE(3), mode | AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_TDF_(1));

	/* enable pin */
	if (data->enable_pin)
		at91_set_gpio_output(data->enable_pin, 1);

	/* ready/busy pin */
	if (data->rdy_pin)
		at91_set_gpio_input(data->rdy_pin, 1);

	/* card detect pin */
	if (data->det_pin)
		at91_set_gpio_input(data->det_pin, 1);

	at91_set_A_periph(AT91_PIN_PC0, 0);		/* NANDOE */
	at91_set_A_periph(AT91_PIN_PC1, 0);		/* NANDWE */

	nand_data = *data;
	platform_device_register(&at91_nand_device);
}

#else
void __init at91_add_device_nand(struct at91_nand_data *data) {}
#endif


/* --------------------------------------------------------------------
 *  TWI (i2c)
 * -------------------------------------------------------------------- */

/*
 * Prefer the GPIO code since the TWI controller isn't robust
 * (gets overruns and underruns under load) and can only issue
 * repeated STARTs in one scenario (the driver doesn't yet handle them).
 */
#if defined(CONFIG_I2C_GPIO) || defined(CONFIG_I2C_GPIO_MODULE)

static struct i2c_gpio_platform_data pdata = {
	.sda_pin		= AT91_PIN_PA7,
	.sda_is_open_drain	= 1,
	.scl_pin		= AT91_PIN_PA8,
	.scl_is_open_drain	= 1,
	.udelay			= 2,		/* ~100 kHz */
};

static struct platform_device at91sam9261_twi_device = {
	.name			= "i2c-gpio",
	.id			= -1,
	.dev.platform_data	= &pdata,
};

void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices)
{
	at91_set_GPIO_periph(AT91_PIN_PA7, 1);		/* TWD (SDA) */
	at91_set_multi_drive(AT91_PIN_PA7, 1);

	at91_set_GPIO_periph(AT91_PIN_PA8, 1);		/* TWCK (SCL) */
	at91_set_multi_drive(AT91_PIN_PA8, 1);

	i2c_register_board_info(0, devices, nr_devices);
	platform_device_register(&at91sam9261_twi_device);
}

#elif defined(CONFIG_I2C_AT91) || defined(CONFIG_I2C_AT91_MODULE)

static struct resource twi_resources[] = {
	[0] = {
		.start	= AT91SAM9261_BASE_TWI,
		.end	= AT91SAM9261_BASE_TWI + SZ_16K - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= AT91SAM9261_ID_TWI,
		.end	= AT91SAM9261_ID_TWI,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device at91sam9261_twi_device = {
	.name		= "at91_i2c",
	.id		= -1,
	.resource	= twi_resources,
	.num_resources	= ARRAY_SIZE(twi_resources),
};

void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices)
{
	/* pins used for TWI interface */
	at91_set_A_periph(AT91_PIN_PA7, 0);		/* TWD */
	at91_set_multi_drive(AT91_PIN_PA7, 1);

	at91_set_A_periph(AT91_PIN_PA8, 0);		/* TWCK */
	at91_set_multi_drive(AT91_PIN_PA8, 1);

	i2c_register_board_info(0, devices, nr_devices);
	platform_device_register(&at91sam9261_twi_device);
}
#else
void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices) {}
#endif


/* --------------------------------------------------------------------
 *  SPI
 * -------------------------------------------------------------------- */

#if defined(CONFIG_SPI_ATMEL) || defined(CONFIG_SPI_ATMEL_MODULE)
static u64 spi_dmamask = 0xffffffffUL;

static struct resource spi0_resources[] = {
	[0] = {
		.start	= AT91SAM9261_BASE_SPI0,
		.end	= AT91SAM9261_BASE_SPI0 + SZ_16K - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= AT91SAM9261_ID_SPI0,
		.end	= AT91SAM9261_ID_SPI0,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct platform_device at91sam9261_spi0_device = {
	.name		= "atmel_spi",
	.id		= 0,
	.dev		= {
				.dma_mask		= &spi_dmamask,
				.coherent_dma_mask	= 0xffffffff,
	},
	.resource	= spi0_resources,
	.num_resources	= ARRAY_SIZE(spi0_resources),
};

static const unsigned spi0_standard_cs[4] = { AT91_PIN_PA3, AT91_PIN_PA4, AT91_PIN_PA5, AT91_PIN_PA6 };

static struct resource spi1_resources[] = {
	[0] = {
		.start	= AT91SAM9261_BASE_SPI1,
		.end	= AT91SAM9261_BASE_SPI1 + SZ_16K - 1,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {