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board-apollon.c

/*
 * linux/arch/arm/mach-omap2/board-apollon.c
 *
 * Copyright (C) 2005,2006 Samsung Electronics
 * Author: Kyungmin Park <kyungmin.park@samsung.com>
 *
 * Modified from mach-omap/omap2/board-h4.c
 *
 * Code for apollon OMAP2 board. Should work on many OMAP2 systems where
 * the bootloader passes the board-specific data to the kernel.
 * Do not put any board specific code to this file; create a new machine
 * type if you need custom low-level initializations.
 *
 * 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/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/onenand.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/leds.h>
#include <linux/err.h>
#include <linux/clk.h>

#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>

#include <asm/arch/gpio.h>
#include <asm/arch/led.h>
#include <asm/arch/mux.h>
#include <asm/arch/usb.h>
#include <asm/arch/board.h>
#include <asm/arch/common.h>
#include <asm/arch/gpmc.h>
#include <asm/arch/control.h>

/* LED & Switch macros */
#define LED0_GPIO13           13
#define LED1_GPIO14           14
#define LED2_GPIO15           15
#define SW_ENTER_GPIO16       16
#define SW_UP_GPIO17          17
#define SW_DOWN_GPIO58        58

#define APOLLON_FLASH_CS      0
#define APOLLON_ETH_CS        1

static struct mtd_partition apollon_partitions[] = {
      {
            .name       = "X-Loader + U-Boot",
            .offset           = 0,
            .size       = SZ_128K,
            .mask_flags = MTD_WRITEABLE,
      },
      {
            .name       = "params",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_128K,
      },
      {
            .name       = "kernel",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_2M,
      },
      {
            .name       = "rootfs",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_16M,
      },
      {
            .name       = "filesystem00",
            .offset           = MTDPART_OFS_APPEND,
            .size       = SZ_32M,
      },
      {
            .name       = "filesystem01",
            .offset           = MTDPART_OFS_APPEND,
            .size       = MTDPART_SIZ_FULL,
      },
};

static struct flash_platform_data apollon_flash_data = {
      .parts            = apollon_partitions,
      .nr_parts   = ARRAY_SIZE(apollon_partitions),
};

static struct resource apollon_flash_resource[] = {
      [0] = {
            .flags            = IORESOURCE_MEM,
      },
};

static struct platform_device apollon_onenand_device = {
      .name       = "onenand",
      .id         = -1,
      .dev        = {
            .platform_data    = &apollon_flash_data,
      },
      .num_resources    = ARRAY_SIZE(apollon_flash_resource),
      .resource   = apollon_flash_resource,
};

static void __init apollon_flash_init(void)
{
      unsigned long base;

      if (gpmc_cs_request(APOLLON_FLASH_CS, SZ_128K, &base) < 0) {
            printk(KERN_ERR "Cannot request OneNAND GPMC CS\n");
            return;
      }
      apollon_flash_resource[0].start = base;
      apollon_flash_resource[0].end   = base + SZ_128K - 1;
}

static struct resource apollon_smc91x_resources[] = {
      [0] = {
            .flags  = IORESOURCE_MEM,
      },
      [1] = {
            .start      = OMAP_GPIO_IRQ(APOLLON_ETHR_GPIO_IRQ),
            .end  = OMAP_GPIO_IRQ(APOLLON_ETHR_GPIO_IRQ),
            .flags      = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
      },
};

static struct platform_device apollon_smc91x_device = {
      .name       = "smc91x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(apollon_smc91x_resources),
      .resource   = apollon_smc91x_resources,
};

static struct platform_device apollon_lcd_device = {
      .name       = "apollon_lcd",
      .id         = -1,
};

static struct omap_led_config apollon_led_config[] = {
      {
            .cdev = {
                  .name = "apollon:led0",
            },
            .gpio = LED0_GPIO13,
      },
      {
            .cdev = {
                  .name = "apollon:led1",
            },
            .gpio = LED1_GPIO14,
      },
      {
            .cdev = {
                  .name = "apollon:led2",
            },
            .gpio = LED2_GPIO15,
      },
};

static struct omap_led_platform_data apollon_led_data = {
      .nr_leds    = ARRAY_SIZE(apollon_led_config),
      .leds       = apollon_led_config,
};

static struct platform_device apollon_led_device = {
      .name       = "omap-led",
      .id         = -1,
      .dev        = {
            .platform_data    = &apollon_led_data,
      },
};

static struct platform_device *apollon_devices[] __initdata = {
      &apollon_onenand_device,
      &apollon_smc91x_device,
      &apollon_lcd_device,
      &apollon_led_device,
};

static inline void __init apollon_init_smc91x(void)
{
      unsigned long base;

      unsigned int rate;
      struct clk *gpmc_fck;
      int eth_cs;

      gpmc_fck = clk_get(NULL, "gpmc_fck");     /* Always on ENABLE_ON_INIT */
      if (IS_ERR(gpmc_fck)) {
            WARN_ON(1);
            return;
      }

      clk_enable(gpmc_fck);
      rate = clk_get_rate(gpmc_fck);

      eth_cs = APOLLON_ETH_CS;

      /* Make sure CS1 timings are correct */
      gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG1, 0x00011200);

      if (rate >= 160000000) {
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f01);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080803);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1c0b1c0a);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
      } else if (rate >= 130000000) {
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x041f1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000004C4);
      } else {/* rate = 100000000 */
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG2, 0x001f1f00);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG3, 0x00080802);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG4, 0x1C091C09);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG5, 0x031A1F1F);
            gpmc_cs_write_reg(eth_cs, GPMC_CS_CONFIG6, 0x000003C2);
      }

      if (gpmc_cs_request(APOLLON_ETH_CS, SZ_16M, &base) < 0) {
            printk(KERN_ERR "Failed to request GPMC CS for smc91x\n");
            goto out;
      }
      apollon_smc91x_resources[0].start = base + 0x300;
      apollon_smc91x_resources[0].end   = base + 0x30f;
      udelay(100);

      omap_cfg_reg(W4__24XX_GPIO74);
      if (omap_request_gpio(APOLLON_ETHR_GPIO_IRQ) < 0) {
            printk(KERN_ERR "Failed to request GPIO%d for smc91x IRQ\n",
                  APOLLON_ETHR_GPIO_IRQ);
            gpmc_cs_free(APOLLON_ETH_CS);
            goto out;
      }
      omap_set_gpio_direction(APOLLON_ETHR_GPIO_IRQ, 1);

out:
      clk_disable(gpmc_fck);
      clk_put(gpmc_fck);
}

static void __init omap_apollon_init_irq(void)
{
      omap2_init_common_hw();
      omap_init_irq();
      omap_gpio_init();
      apollon_init_smc91x();
}

static struct omap_uart_config apollon_uart_config __initdata = {
      .enabled_uarts = (1 << 0) | (0 << 1) | (0 << 2),
};

static struct omap_mmc_config apollon_mmc_config __initdata = {
      .mmc [0] = {
            .enabled    = 1,
            .wire4            = 1,
            .wp_pin           = -1,
            .power_pin  = -1,
            .switch_pin = -1,
      },
};

static struct omap_usb_config apollon_usb_config __initdata = {
      .register_dev     = 1,
      .hmc_mode   = 0x14,     /* 0:dev 1:host1 2:disable */

      .pins[0]    = 6,
};

static struct omap_lcd_config apollon_lcd_config __initdata = {
      .ctrl_name  = "internal",
};

static struct omap_board_config_kernel apollon_config[] = {
      { OMAP_TAG_UART,  &apollon_uart_config },
      { OMAP_TAG_MMC,         &apollon_mmc_config },
      { OMAP_TAG_USB,         &apollon_usb_config },
      { OMAP_TAG_LCD,         &apollon_lcd_config },
};

static void __init apollon_led_init(void)
{
      /* LED0 - AA10 */
      omap_cfg_reg(AA10_242X_GPIO13);
      omap_request_gpio(LED0_GPIO13);
      omap_set_gpio_direction(LED0_GPIO13, 0);
      omap_set_gpio_dataout(LED0_GPIO13, 0);
      /* LED1  - AA6 */
      omap_cfg_reg(AA6_242X_GPIO14);
      omap_request_gpio(LED1_GPIO14);
      omap_set_gpio_direction(LED1_GPIO14, 0);
      omap_set_gpio_dataout(LED1_GPIO14, 0);
      /* LED2  - AA4 */
      omap_cfg_reg(AA4_242X_GPIO15);
      omap_request_gpio(LED2_GPIO15);
      omap_set_gpio_direction(LED2_GPIO15, 0);
      omap_set_gpio_dataout(LED2_GPIO15, 0);
}

static irqreturn_t apollon_sw_interrupt(int irq, void *ignored)
{
      static unsigned int led0, led1, led2;

      if (irq == OMAP_GPIO_IRQ(SW_ENTER_GPIO16))
            omap_set_gpio_dataout(LED0_GPIO13, led0 ^= 1);
      else if (irq == OMAP_GPIO_IRQ(SW_UP_GPIO17))
            omap_set_gpio_dataout(LED1_GPIO14, led1 ^= 1);
      else if (irq == OMAP_GPIO_IRQ(SW_DOWN_GPIO58))
            omap_set_gpio_dataout(LED2_GPIO15, led2 ^= 1);

      return IRQ_HANDLED;
}

static void __init apollon_sw_init(void)
{
      /* Enter SW - Y11 */
      omap_cfg_reg(Y11_242X_GPIO16);
      omap_request_gpio(SW_ENTER_GPIO16);
      omap_set_gpio_direction(SW_ENTER_GPIO16, 1);
      /* Up SW - AA12 */
      omap_cfg_reg(AA12_242X_GPIO17);
      omap_request_gpio(SW_UP_GPIO17);
      omap_set_gpio_direction(SW_UP_GPIO17, 1);
      /* Down SW - AA8 */
      omap_cfg_reg(AA8_242X_GPIO58);
      omap_request_gpio(SW_DOWN_GPIO58);
      omap_set_gpio_direction(SW_DOWN_GPIO58, 1);

      set_irq_type(OMAP_GPIO_IRQ(SW_ENTER_GPIO16), IRQT_RISING);
      if (request_irq(OMAP_GPIO_IRQ(SW_ENTER_GPIO16), &apollon_sw_interrupt,
                        IRQF_SHARED, "enter sw",
                        &apollon_sw_interrupt))
            return;
      set_irq_type(OMAP_GPIO_IRQ(SW_UP_GPIO17), IRQT_RISING);
      if (request_irq(OMAP_GPIO_IRQ(SW_UP_GPIO17), &apollon_sw_interrupt,
                        IRQF_SHARED, "up sw",
                        &apollon_sw_interrupt))
            return;
      set_irq_type(OMAP_GPIO_IRQ(SW_DOWN_GPIO58), IRQT_RISING);
      if (request_irq(OMAP_GPIO_IRQ(SW_DOWN_GPIO58), &apollon_sw_interrupt,
                        IRQF_SHARED, "down sw",
                        &apollon_sw_interrupt))
            return;
}

static void __init apollon_usb_init(void)
{
      /* USB device */
      /* DEVICE_SUSPEND */
      omap_cfg_reg(P21_242X_GPIO12);
      omap_request_gpio(12);
      omap_set_gpio_direction(12, 0);           /* OUT */
      omap_set_gpio_dataout(12, 0);
}

static void __init omap_apollon_init(void)
{
      u32 v;

      apollon_led_init();
      apollon_sw_init();
      apollon_flash_init();
      apollon_usb_init();

      /* REVISIT: where's the correct place */
      omap_cfg_reg(W19_24XX_SYS_NIRQ);

      /* Use Interal loop-back in MMC/SDIO Module Input Clock selection */
      v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
      v |= (1 << 24);
      omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);

      /*
       * Make sure the serial ports are muxed on at this point.
       * You have to mux them off in device drivers later on
       * if not needed.
       */
      platform_add_devices(apollon_devices, ARRAY_SIZE(apollon_devices));
      omap_board_config = apollon_config;
      omap_board_config_size = ARRAY_SIZE(apollon_config);
      omap_serial_init();
}

static void __init omap_apollon_map_io(void)
{
      omap2_set_globals_242x();
      omap2_map_common_io();
}

MACHINE_START(OMAP_APOLLON, "OMAP24xx Apollon")
      /* Maintainer: Kyungmin Park <kyungmin.park@samsung.com> */
      .phys_io    = 0x48000000,
      .io_pg_offst      = ((0xd8000000) >> 18) & 0xfffc,
      .boot_params      = 0x80000100,
      .map_io           = omap_apollon_map_io,
      .init_irq   = omap_apollon_init_irq,
      .init_machine     = omap_apollon_init,
      .timer            = &omap_timer,
MACHINE_END

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