板子MDK9263

内核版本2.6.26

uboot版本1.3.4

交叉编译工具arm-none-linux-gnueabi

问题：内核起来后停止在start kernel...阶段

解决办法：1、注意menuconfig里的选项！

               2、注意board_at91sam9263ek.c中硬件的配置（附修改后的代码）

/*
 * linux/arch/arm/mach-at91/board-sam9263ek.c
 *
 *  Copyright (C) 2005 SAN People
 *  Copyright (C) 2007 Atmel Corporation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>
#include <linux/fb.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>

#include <video/atmel_lcdc.h>

#include <mach/hardware.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/irq.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <mach/board.h>
#include <mach/gpio.h>
#include <mach/at91sam9_smc.h>

#include "generic.h"

static void __init ek_map_io(void)
{
 /* Initialize processor: 16.367 MHz crystal */
 at91sam9263_initialize(18432000);

 /* DGBU on ttyS0. (Rx & Tx only) */
 at91_register_uart(0, 0, 0);

 /* USART0 on ttyS1. (Rx, Tx, RTS, CTS) */
 at91_register_uart(AT91SAM9263_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS);

 /* set serial console to ttyS0 (ie, DBGU) */
 at91_set_serial_console(0);
}

static void __init ek_init_irq(void)
{
 at91sam9263_init_interrupts(NULL);
}

/*
 * USB Host port
 */
static struct at91_usbh_data __initdata ek_usbh_data = {
 .ports  = 2,
 .vbus_pin = { AT91_PIN_PA24, AT91_PIN_PA21 },
};

/*
 * USB Device port
 */
static struct at91_udc_data __initdata ek_udc_data = {
 .vbus_pin = AT91_PIN_PA25,
 .pullup_pin = 0,  /* pull-up driven by UDC */
};

/*
 * ADS7846 Touchscreen
 */
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
static int ads7843_pendown_state(void)
{
 return !at91_get_gpio_value(AT91_PIN_PA15); /* Touchscreen PENIRQ */
}

static struct ads7846_platform_data ads_info = {
 .model   = 7843,
 .x_min   = 150,
 .x_max   = 3830,
 .y_min   = 190,
 .y_max   = 3830,
 .vref_delay_usecs = 100,
 .x_plate_ohms  = 450,
 .y_plate_ohms  = 250,
 .pressure_max  = 15000,
 .debounce_max  = 1,
 .debounce_rep  = 0,
 .debounce_tol  = (~0),
 .get_pendown_state = ads7843_pendown_state,
};

static void __init ek_add_device_ts(void)
{
 at91_set_B_periph(AT91_PIN_PA15, 1); /* External IRQ1, with pullup */
 at91_set_gpio_input(AT91_PIN_PA31, 1); /* Touchscreen BUSY signal */
}
#else
static void __init ek_add_device_ts(void) {}
#endif

/*
 * SPI devices.
 */
static struct spi_board_info ek_spi_devices[] = {
#if defined(CONFIG_MTD_AT91_DATAFLASH_CARD)
 { /* DataFlash card */
  .modalias = "mtd_dataflash",
  .chip_select = 0,
  .max_speed_hz = 15 * 1000 * 1000,
  .bus_num = 0,
 },
#endif
#if defined(CONFIG_TOUCHSCREEN_ADS7846) || defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
 {
  .modalias = "ads7846",
  .chip_select = 3,
  .max_speed_hz = 125000 * 26, /* (max sample rate @ 3V) * (cmd + data + overhead) */
  .bus_num = 0,
  .platform_data = &ads_info,
  .irq  = AT91SAM9263_ID_IRQ1,
 },
#endif
};

/*
 * MCI (SD/MMC)
 */
static struct at91_mmc_data __initdata ek_mmc_data = {
 .wire4  = 1,
 .det_pin = AT91_PIN_PE18,
 .wp_pin  = AT91_PIN_PE19,
// .vcc_pin = ... not connected
};

/*
 * MACB Ethernet device
 */
static struct at91_eth_data __initdata ek_macb_data = {
 .phy_irq_pin = AT91_PIN_PE31,
 .is_rmii = 1,
};

/*
 * NAND flash
 */
static struct mtd_partition __initdata ek_nand_partition[] = {
 {
  .name = "Partition 1",
  .offset = 0,
  .size = 64 * 1024 * 1024,
 },
 {
  .name = "Partition 2",
  .offset = 64 * 1024 * 1024,
  .size = MTDPART_SIZ_FULL,
 },
};

static struct mtd_partition * __init nand_partitions(int size, int *num_partitions)
{
 *num_partitions = ARRAY_SIZE(ek_nand_partition);
 return ek_nand_partition;
}

static struct atmel_nand_data __initdata ek_nand_data = {
 .ale  = 21,
 .cle  = 22,
// .det_pin = ... not connected
 .rdy_pin = AT91_PIN_PA22,
 .enable_pin = AT91_PIN_PD15,
 .partition_info = nand_partitions,
#if defined(CONFIG_MTD_NAND_ATMEL_BUSWIDTH_16)
 .bus_width_16 = 1,
#else
 .bus_width_16 = 0,
#endif
};

/*
 * LCD Controller
 */
#if defined(CONFIG_FB_ATMEL) || defined(CONFIG_FB_ATMEL_MODULE)
static struct fb_videomode at91_tft_vga_modes[] = {
 {
         .name           = "TX09D50VM1CCA @ 60",
  .refresh = 60,
  .xres  = 320,  .yres  = 240,
  .pixclock = KHZ2PICOS(4965),

  .left_margin = 11,  .right_margin = 10,
  .upper_margin = 7,  .lower_margin = 11,
  .hsync_len = 2,  .vsync_len = 2,

  .sync  = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  .vmode  = FB_VMODE_NONINTERLACED,
 },
};

static struct fb_monspecs at91fb_default_monspecs = {
 .manufacturer = "HIT",
 .monitor        = "TX09D70VM1CCA",

 .modedb  = at91_tft_vga_modes,
 .modedb_len = ARRAY_SIZE(at91_tft_vga_modes),
 .hfmin  = 15000,
 .hfmax  = 64000,
 .vfmin  = 50,
 .vfmax  = 150,
};

#define AT91SAM9263_DEFAULT_LCDCON2  (ATMEL_LCDC_MEMOR_LITTLE /
     | ATMEL_LCDC_DISTYPE_TFT    /
     | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE)

static void at91_lcdc_power_control(int on)
{
 at91_set_gpio_value(AT91_PIN_PA30, on);
}

/* Driver datas */
static struct atmel_lcdfb_info __initdata ek_lcdc_data = {
 .lcdcon_is_backlight  = true,
 .default_bpp   = 16,
 .default_dmacon   = ATMEL_LCDC_DMAEN,
 .default_lcdcon2  = AT91SAM9263_DEFAULT_LCDCON2,
 .default_monspecs  = &at91fb_default_monspecs,
 .atmel_lcdfb_power_control = at91_lcdc_power_control,
 .guard_time   = 1,
};

#else
static struct atmel_lcdfb_info __initdata ek_lcdc_data;
#endif

/*
 * GPIO Buttons
 */
#if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
static struct gpio_keys_button ek_buttons[] = {
 { /* BP1, "leftclic" */
  .code  = BTN_LEFT,
  .gpio  = AT91_PIN_PC5,
  .active_low = 1,
  .desc  = "left_click",
  .wakeup  = 1,
 },
 { /* BP2, "rightclic" */
  .code  = BTN_RIGHT,
  .gpio  = AT91_PIN_PC4,
  .active_low = 1,
  .desc  = "right_click",
  .wakeup  = 1,
 },
};

static struct gpio_keys_platform_data ek_button_data = {
 .buttons = ek_buttons,
 .nbuttons = ARRAY_SIZE(ek_buttons),
};

static struct platform_device ek_button_device = {
 .name  = "gpio-keys",
 .id  = -1,
 .num_resources = 0,
 .dev  = {
  .platform_data = &ek_button_data,
 }
};

static void __init ek_add_device_buttons(void)
{
 at91_set_GPIO_periph(AT91_PIN_PC5, 0); /* left button */
 at91_set_deglitch(AT91_PIN_PC5, 1);
 at91_set_GPIO_periph(AT91_PIN_PC4, 0); /* right button */
 at91_set_deglitch(AT91_PIN_PC4, 1);

 platform_device_register(&ek_button_device);
}
#else
static void __init ek_add_device_buttons(void) {}
#endif

/*
 * AC97
 */
static struct atmel_ac97_data ek_ac97_data = {
 .reset_pin = AT91_PIN_PA13,
};

/*
 * LEDs ... these could all be PWM-driven, for variable brightness
 */
static struct gpio_led ek_leds[] = {
 { /* "left" led, green, userled1, pwm1 */
  .name   = "ds1",
  .gpio   = AT91_PIN_PB8,
  .active_low  = 1,
  .default_trigger = "mmc0",
 },
 { /* "right" led, green, userled2, pwm2 */
  .name   = "ds2",
  .gpio   = AT91_PIN_PC29,
  .active_low  = 1,
  .default_trigger = "nand-disk",
 },
 { /* "power" led, yellow, pwm0 */
  .name   = "ds3",
  .gpio   = AT91_PIN_PB7,
  .default_trigger = "heartbeat",
 }
};

static void __init ek_board_init(void)
{
 /* Serial */
 at91_add_device_serial();
 /* USB Host */
 at91_add_device_usbh(&ek_usbh_data);
 /* USB Device */
 at91_add_device_udc(&ek_udc_data);
 /* SPI */
 at91_set_gpio_output(AT91_PIN_PE20, 1);  /* select spi0 clock */
 at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices));
 /* Touchscreen */
 ek_add_device_ts();
 /* MMC */
 at91_add_device_mmc(1, &ek_mmc_data);
 /* Ethernet */
 at91_add_device_eth(&ek_macb_data);
 /* NAND */
 at91_add_device_nand(&ek_nand_data);
 /* I2C */
 at91_add_device_i2c(NULL, 0);
 /* LCD Controller */
 at91_add_device_lcdc(&ek_lcdc_data);
 /* Push Buttons */
 ek_add_device_buttons();
 /* AC97 */
 at91_add_device_ac97(&ek_ac97_data);
 /* LEDs */
 at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
}

MACHINE_START(AT91SAM9263EK, "Atmel AT91SAM9263-EK")
 /* Maintainer: Atmel */
 .phys_io = AT91_BASE_SYS,
 .io_pg_offst = (AT91_VA_BASE_SYS >> 18) & 0xfffc,
 .boot_params = AT91_SDRAM_BASE + 0x100,
 .timer  = &at91sam926x_timer,
 .map_io  = ek_map_io,
 .init_irq = ek_init_irq,
 .init_machine = ek_board_init,
MACHINE_END