em7210.c

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/*
 * arch/arm/mach-iop32x/em7210.c
 *
 * Board support code for the Lanner EM7210 platforms.
 *
 * Based on arch/arm/mach-iop32x/iq31244.c file.
 *
 * Copyright (C) 2007 Arnaud Patard <[email protected]>
 *
 * 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.
 *
 */

#include <linux/mm.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include <asm/mach/time.h>
#include <asm/mach-types.h>
#include <mach/time.h>

static void __init em7210_timer_init(void)
{
    /* http://www.kwaak.net/fotos/fotos-nas/slide_24.html */
    /* 33.333 MHz crystal.                                */
    iop_init_time(200000000);
}

static struct sys_timer em7210_timer = {
    .init       = em7210_timer_init,
};

/*
 * EM7210 RTC
 */
static struct i2c_board_info __initdata em7210_i2c_devices[] = {
    {
        I2C_BOARD_INFO("rs5c372a", 0x32),
    },
};

/*
 * EM7210 I/O
 */
static struct map_desc em7210_io_desc[] __initdata = {
    {   /* on-board devices */
        .virtual    = IQ31244_UART,
        .pfn        = __phys_to_pfn(IQ31244_UART),
        .length     = 0x00100000,
        .type       = MT_DEVICE,
    },
};

void __init em7210_map_io(void)
{
    iop3xx_map_io();
    iotable_init(em7210_io_desc, ARRAY_SIZE(em7210_io_desc));
}


/*
 * EM7210 PCI
 */
#define INTA    IRQ_IOP32X_XINT0
#define INTB    IRQ_IOP32X_XINT1
#define INTC    IRQ_IOP32X_XINT2
#define INTD    IRQ_IOP32X_XINT3

static int __init
em7210_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
    static int pci_irq_table[][4] = {
        /*
         * PCI IDSEL/INTPIN->INTLINE
         * A       B       C       D
         */
        {INTB, INTB, INTB, INTB}, /* console / uart */
        {INTA, INTA, INTA, INTA}, /* 1st 82541      */
        {INTD, INTD, INTD, INTD}, /* 2nd 82541      */
        {INTC, INTC, INTC, INTC}, /* GD31244        */
        {INTD, INTA, INTA, INTA}, /* mini-PCI       */
        {INTD, INTC, INTA, INTA}, /* NEC USB        */
    };

    if (pin < 1 || pin > 4)
        return -1;

    return pci_irq_table[slot % 6][pin - 1];
}

static struct hw_pci em7210_pci __initdata = {
    .nr_controllers = 1,
    .ops        = &iop3xx_ops,
    .setup      = iop3xx_pci_setup,
    .preinit    = iop3xx_pci_preinit,
    .map_irq    = em7210_pci_map_irq,
};

static int __init em7210_pci_init(void)
{
    if (machine_is_em7210())
        pci_common_init(&em7210_pci);

    return 0;
}

subsys_initcall(em7210_pci_init);


/*
 * EM7210 Flash
 */
static struct physmap_flash_data em7210_flash_data = {
    .width      = 2,
};

static struct resource em7210_flash_resource = {
    .start      = 0xf0000000,
    .end        = 0xf1ffffff,
    .flags      = IORESOURCE_MEM,
};

static struct platform_device em7210_flash_device = {
    .name       = "physmap-flash",
    .id     = 0,
    .dev        = {
        .platform_data  = &em7210_flash_data,
    },
    .num_resources  = 1,
    .resource   = &em7210_flash_resource,
};


/*
 * EM7210 UART
 * The physical address of the serial port is 0xfe800000,
 * so it can be used for physical and virtual address.
 */
static struct plat_serial8250_port em7210_serial_port[] = {
    {
        .mapbase    = IQ31244_UART,
        .membase    = (char *)IQ31244_UART,
        .irq        = IRQ_IOP32X_XINT1,
        .flags      = UPF_SKIP_TEST,
        .iotype     = UPIO_MEM,
        .regshift   = 0,
        .uartclk    = 1843200,
    },
    { },
};

static struct resource em7210_uart_resource = {
    .start      = IQ31244_UART,
    .end        = IQ31244_UART + 7,
    .flags      = IORESOURCE_MEM,
};

static struct platform_device em7210_serial_device = {
    .name       = "serial8250",
    .id     = PLAT8250_DEV_PLATFORM,
    .dev        = {
        .platform_data      = em7210_serial_port,
    },
    .num_resources  = 1,
    .resource   = &em7210_uart_resource,
};

void em7210_power_off(void)
{
    *IOP3XX_GPOE &= 0xfe;
    *IOP3XX_GPOD |= 0x01;
}

static void __init em7210_init_machine(void)
{
    platform_device_register(&em7210_serial_device);
    platform_device_register(&iop3xx_i2c0_device);
    platform_device_register(&iop3xx_i2c1_device);
    platform_device_register(&em7210_flash_device);
    platform_device_register(&iop3xx_dma_0_channel);
    platform_device_register(&iop3xx_dma_1_channel);

    i2c_register_board_info(0, em7210_i2c_devices,
        ARRAY_SIZE(em7210_i2c_devices));


    pm_power_off = em7210_power_off;
}

MACHINE_START(EM7210, "Lanner EM7210")
    .atag_offset    = 0x100,
    .map_io     = em7210_map_io,
    .init_irq   = iop32x_init_irq,
    .timer      = &em7210_timer,
    .init_machine   = em7210_init_machine,
    .restart    = iop3xx_restart,
MACHINE_END