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em7210.c

/*
 * 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 <arnaud.patard@rtp-net.org>
 *
 * 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 <asm/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 <asm/arch/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,
      .offset           = iop_gettimeoffset,
};

/*
 * 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(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 = {
      .swizzle    = pci_std_swizzle,
      .nr_controllers = 1,
      .setup            = iop3xx_pci_setup,
      .preinit    = iop3xx_pci_preinit,
      .scan       = iop3xx_pci_scan_bus,
      .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")
      .phys_io    = IQ31244_UART,
      .io_pg_offst      = ((IQ31244_UART) >> 18) & 0xfffc,
      .boot_params      = 0xa0000100,
      .map_io           = em7210_map_io,
      .init_irq   = iop32x_init_irq,
      .timer            = &em7210_timer,
      .init_machine     = em7210_init_machine,
MACHINE_END

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