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devices.c

/*
 *  RouterBoard 500 Platform devices
 *
 *  Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
 *  Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
 *
 *  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.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>

#include <asm/bootinfo.h>

#include <asm/mach-rc32434/rc32434.h>
#include <asm/mach-rc32434/dma.h>
#include <asm/mach-rc32434/dma_v.h>
#include <asm/mach-rc32434/eth.h>
#include <asm/mach-rc32434/rb.h>
#include <asm/mach-rc32434/integ.h>
#include <asm/mach-rc32434/gpio.h>
#include <asm/mach-rc32434/irq.h>

#define ETH0_RX_DMA_ADDR  (DMA0_BASE_ADDR + 0 * DMA_CHAN_OFFSET)
#define ETH0_TX_DMA_ADDR  (DMA0_BASE_ADDR + 1 * DMA_CHAN_OFFSET)

static struct resource korina_dev0_res[] = {
      {
            .name = "korina_regs",
            .start = ETH0_BASE_ADDR,
            .end = ETH0_BASE_ADDR + sizeof(struct eth_regs),
            .flags = IORESOURCE_MEM,
       }, {
            .name = "korina_rx",
            .start = ETH0_DMA_RX_IRQ,
            .end = ETH0_DMA_RX_IRQ,
            .flags = IORESOURCE_IRQ
      }, {
            .name = "korina_tx",
            .start = ETH0_DMA_TX_IRQ,
            .end = ETH0_DMA_TX_IRQ,
            .flags = IORESOURCE_IRQ
      }, {
            .name = "korina_ovr",
            .start = ETH0_RX_OVR_IRQ,
            .end = ETH0_RX_OVR_IRQ,
            .flags = IORESOURCE_IRQ
      }, {
            .name = "korina_und",
            .start = ETH0_TX_UND_IRQ,
            .end = ETH0_TX_UND_IRQ,
            .flags = IORESOURCE_IRQ
      }, {
            .name = "korina_dma_rx",
            .start = ETH0_RX_DMA_ADDR,
            .end = ETH0_RX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
            .flags = IORESOURCE_MEM,
       }, {
            .name = "korina_dma_tx",
            .start = ETH0_TX_DMA_ADDR,
            .end = ETH0_TX_DMA_ADDR + DMA_CHAN_OFFSET - 1,
            .flags = IORESOURCE_MEM,
       }
};

static struct korina_device korina_dev0_data = {
      .name = "korina0",
      .mac = {0xde, 0xca, 0xff, 0xc0, 0xff, 0xee}
};

static struct platform_device korina_dev0 = {
      .id = -1,
      .name = "korina",
      .dev.platform_data = &korina_dev0_data,
      .resource = korina_dev0_res,
      .num_resources = ARRAY_SIZE(korina_dev0_res),
};

static struct resource cf_slot0_res[] = {
      {
            .name = "cf_membase",
            .flags = IORESOURCE_MEM
      }, {
            .name = "cf_irq",
            .start = (8 + 4 * 32 + CF_GPIO_NUM),      /* 149 */
            .end = (8 + 4 * 32 + CF_GPIO_NUM),
            .flags = IORESOURCE_IRQ
      }
};

static struct cf_device cf_slot0_data = {
      .gpio_pin = CF_GPIO_NUM
};

static struct platform_device cf_slot0 = {
      .id = -1,
      .name = "pata-rb532-cf",
      .dev.platform_data = &cf_slot0_data,
      .resource = cf_slot0_res,
      .num_resources = ARRAY_SIZE(cf_slot0_res),
};

/* Resources and device for NAND */
static int rb532_dev_ready(struct mtd_info *mtd)
{
      return gpio_get_value(GPIO_RDY);
}

static void rb532_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
      struct nand_chip *chip = mtd->priv;
      unsigned char orbits, nandbits;

      if (ctrl & NAND_CTRL_CHANGE) {
            orbits = (ctrl & NAND_CLE) << 1;
            orbits |= (ctrl & NAND_ALE) >> 1;

            nandbits = (~ctrl & NAND_CLE) << 1;
            nandbits |= (~ctrl & NAND_ALE) >> 1;

            set_latch_u5(orbits, nandbits);
      }
      if (cmd != NAND_CMD_NONE)
            writeb(cmd, chip->IO_ADDR_W);
}

static struct resource nand_slot0_res[] = {
      [0] = {
            .name = "nand_membase",
            .flags = IORESOURCE_MEM
      }
};

static struct platform_nand_data rb532_nand_data = {
      .ctrl.dev_ready = rb532_dev_ready,
      .ctrl.cmd_ctrl    = rb532_cmd_ctrl,
};

static struct platform_device nand_slot0 = {
      .name = "gen_nand",
      .id = -1,
      .resource = nand_slot0_res,
      .num_resources = ARRAY_SIZE(nand_slot0_res),
      .dev.platform_data = &rb532_nand_data,
};

static struct mtd_partition rb532_partition_info[] = {
      {
            .name = "Routerboard NAND boot",
            .offset = 0,
            .size = 4 * 1024 * 1024,
      }, {
            .name = "rootfs",
            .offset = MTDPART_OFS_NXTBLK,
            .size = MTDPART_SIZ_FULL,
      }
};

static struct platform_device rb532_led = {
      .name = "rb532-led",
      .id = -1,
};

static struct gpio_keys_button rb532_gpio_btn[] = {
      {
            .gpio = 1,
            .code = BTN_0,
            .desc = "S1",
            .active_low = 1,
      }
};

static struct gpio_keys_platform_data rb532_gpio_btn_data = {
      .buttons = rb532_gpio_btn,
      .nbuttons = ARRAY_SIZE(rb532_gpio_btn),
};

static struct platform_device rb532_button = {
      .name       = "gpio-keys",
      .id   = -1,
      .dev  = {
            .platform_data = &rb532_gpio_btn_data,
      }
};

static struct resource rb532_wdt_res[] = {
      {
            .name = "rb532_wdt_res",
            .start = INTEG0_BASE_ADDR,
            .end = INTEG0_BASE_ADDR + sizeof(struct integ),
            .flags = IORESOURCE_MEM,
      }
};

static struct platform_device rb532_wdt = {
      .name             = "rc32434_wdt",
      .id         = -1,
      .resource   = rb532_wdt_res,
      .num_resources    = ARRAY_SIZE(rb532_wdt_res),
};

static struct platform_device *rb532_devs[] = {
      &korina_dev0,
      &nand_slot0,
      &cf_slot0,
      &rb532_led,
      &rb532_button,
      &rb532_wdt
};

static void __init parse_mac_addr(char *macstr)
{
      int i, j;
      unsigned char result, value;

      for (i = 0; i < 6; i++) {
            result = 0;

            if (i != 5 && *(macstr + 2) != ':')
                  return;

            for (j = 0; j < 2; j++) {
                  if (isxdigit(*macstr)
                      && (value =
                        isdigit(*macstr) ? *macstr -
                        '0' : toupper(*macstr) - 'A' + 10) < 16) {
                        result = result * 16 + value;
                        macstr++;
                  } else
                        return;
            }

            macstr++;
            korina_dev0_data.mac[i] = result;
      }
}


/* NAND definitions */
#define NAND_CHIP_DELAY 25

static void __init rb532_nand_setup(void)
{
      switch (mips_machtype) {
      case MACH_MIKROTIK_RB532A:
            set_latch_u5(LO_FOFF | LO_CEX,
                        LO_ULED | LO_ALE | LO_CLE | LO_WPX);
            break;
      default:
            set_latch_u5(LO_WPX | LO_FOFF | LO_CEX,
                        LO_ULED | LO_ALE | LO_CLE);
            break;
      }

      /* Setup NAND specific settings */
      rb532_nand_data.chip.nr_chips = 1;
      rb532_nand_data.chip.nr_partitions = ARRAY_SIZE(rb532_partition_info);
      rb532_nand_data.chip.partitions = rb532_partition_info;
      rb532_nand_data.chip.chip_delay = NAND_CHIP_DELAY;
      rb532_nand_data.chip.options = NAND_NO_AUTOINCR;
}


static int __init plat_setup_devices(void)
{
      /* Look for the CF card reader */
      if (!readl(IDT434_REG_BASE + DEV1MASK))
            rb532_devs[2] = NULL;   /* disable cf_slot0 at index 2 */
      else {
            cf_slot0_res[0].start =
                readl(IDT434_REG_BASE + DEV1BASE);
            cf_slot0_res[0].end = cf_slot0_res[0].start + 0x1000;
      }

      /* Read the NAND resources from the device controller */
      nand_slot0_res[0].start = readl(IDT434_REG_BASE + DEV2BASE);
      nand_slot0_res[0].end = nand_slot0_res[0].start + 0x1000;

      /* Initialise the NAND device */
      rb532_nand_setup();

      return platform_add_devices(rb532_devs, ARRAY_SIZE(rb532_devs));
}

static int __init setup_kmac(char *s)
{
      printk(KERN_INFO "korina mac = %s\n", s);
      parse_mac_addr(s);
      return 0;
}

__setup("kmac=", setup_kmac);

arch_initcall(plat_setup_devices);

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