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devices.c

/*
 * Common devices definition for Gemini
 *
 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
 *
 * 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/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/mtd/physmap.h>

#include <mach/irqs.h>
#include <mach/hardware.h>
#include <mach/global_reg.h>

static struct plat_serial8250_port serial_platform_data[] = {
      {
            .membase    = (void *)IO_ADDRESS(GEMINI_UART_BASE),
            .mapbase    = GEMINI_UART_BASE,
            .irq        = IRQ_UART,
            .uartclk    = UART_CLK,
            .regshift   = 2,
            .iotype           = UPIO_MEM,
            .type       = PORT_16550A,
            .flags            = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_FIXED_TYPE,
      },
      {},
};

static struct platform_device serial_device = {
      .name = "serial8250",
      .id   = PLAT8250_DEV_PLATFORM,
      .dev  = {
            .platform_data = serial_platform_data,
      },
};

int platform_register_uart(void)
{
      return platform_device_register(&serial_device);
}

static struct resource flash_resource = {
      .start      = GEMINI_FLASH_BASE,
      .flags      = IORESOURCE_MEM,
};

static struct physmap_flash_data pflash_platform_data = {};

static struct platform_device pflash_device = {
      .name = "physmap-flash",
      .id   = 0,
      .dev  = {
            .platform_data = &pflash_platform_data,
      },
      .resource = &flash_resource,
      .num_resources = 1,
};

int platform_register_pflash(unsigned int size, struct mtd_partition *parts,
                       unsigned int nr_parts)
{
      unsigned int reg;

      reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_STATUS);

      if ((reg & FLASH_TYPE_MASK) != FLASH_TYPE_PARALLEL)
            return -ENXIO;

      if (reg & FLASH_WIDTH_16BIT)
            pflash_platform_data.width = 2;
      else
            pflash_platform_data.width = 1;

      /* enable parallel flash pins and disable others */
      reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
      reg &= ~PFLASH_PADS_DISABLE;
      reg |= SFLASH_PADS_DISABLE | NAND_PADS_DISABLE;
      __raw_writel(reg, IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);

      flash_resource.end = flash_resource.start + size - 1;

      pflash_platform_data.parts = parts;
      pflash_platform_data.nr_parts = nr_parts;

      return platform_device_register(&pflash_device);
}

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