board-init.c

1. 8623L平台

/*****************************************
 Copyright (c) 2002-2007
 Sigma Designs, Inc. All Rights Reserved
 Proprietary and Confidential
 *****************************************/

#include "../config.h"
#include "../uart.h"
#include "../util.h"
#include "../vsprintf.h"
#include "../io.h"
#include "../em86xxapi.h"
#include "hardware.h" /* PMP_8628 definition */

/* Board specific initialization routine */
int board_init(void)
{
 	uart_puts("Configuring RCLKOUT\n");
  	__raw_writel(0x01070014, REG_BASE_SYSTEM + SYS_clkgen2_pll);
	__raw_writel(0x00000202, REG_BASE_SYSTEM + SYS_clkgen2_div);
	__raw_writel(0x0C000000, REG_BASE_SYSTEM + SYS_avclk_mux);

#if defined(CONFIG_ENABLE_IRQHANDLER) && defined(CONFIG_ENABLE_BITMAPS) && defined (CONFIG_ENABLE_VSYNCPARAM)
	/* leave display on, we show splashscreen right away anyway */
#else

	/* don't display garbage, so disable lcd interface till gui comes up */
	uart_puts("Disabling LCD\n");
	#ifdef PMP_8628
		em86xx_gpio_write(32, 0); /* LED_SET */
		em86xx_usleep(500);

		/* follow power on/off sequence described on page 19 of lcd datasheet LTP400WQ-F01 */
		em86xx_msleep(160/4);
		em86xx_gpio_write(30, 0); /* LCD_DISP */

		em86xx_msleep(50/2);
		em86xx_gpio_write(25, 0); /* LCD5V_ON */

		em86xx_msleep(50/2);
  		__raw_writel(0x7F6E, 0x6c138); /* uart0: change dtr, rts, dcd, dsr, cts to gpio */
		__raw_writel(0x0800, 0x6c134); /* put uart0 dcd/gpio3 low */
		__raw_writel(0x0808, 0x6c130); /* uart0 dcd output */

		em86xx_msleep(50/2);
		em86xx_gpio_write(29, 0); /* LCD2V6_ON */
	#else
		/* turn off backlight (LED_PWM) */
		__raw_writel(0x107FFFF, 0x10510);

		/* just turn off lcd interface, everything else is hardware logic */
  		__raw_writel(0x7F6E, 0x6c138); /* uart0: change dtr, rts, dcd, dsr, cts to gpio */
		__raw_writel(0x0800, 0x6c134); /* put uart0 dcd/gpio3 low */
		__raw_writel(0x0808, 0x6c130); /* uart0 dcd output */
	#endif
#endif

#ifdef PMP_8628
	/* do PCI reset */
	uart_puts("Resetting PCI\n");
	em86xx_msleep(100);
	em86xx_gpio_write(26, 1); /* make sure bit is initialized to output in config file */
#endif

	/* add delay for PCI reset */
	uart_puts("Waiting for PCI reset\n");
	em86xx_msleep(10);

	/* do hdd hardware reset */
	uart_puts("Resetting HDD\n");
	em86xx_gpio_write(14, 1);
	em86xx_msleep(1);
	em86xx_gpio_write(14, 0);
	em86xx_msleep(1);
	em86xx_gpio_write(14, 1);

#ifndef PMP_8620
	/* power down samsung wlan module by default to save power */
	uart_puts("Powering down WLAN module\n");
	em86xx_gpio_write(7, 0); /* make sure bit is initialized to output in config file */
#endif

	return(0);
}
#if defined(CONFIG_ENABLE_IRQHANDLER) && defined(CONFIG_ENABLE_BITMAPS) && defined (CONFIG_ENABLE_VSYNCPARAM)
/* Board specific initialization routine for screen */
int board_splashscreen_init(void)
{
#ifndef CONFIG_BOOT_2NDBOOT
	/* enable lcd interface */
 	uart_puts("Enabling LCD for splashscreen\n");
	#ifdef PMP_8628
		/* follow power on/off sequence described on page 19 of lcd datasheet LTP400WQ-F01 */
		em86xx_gpio_write(29, 1); /* LCD2V6_ON */
		em86xx_msleep(50/2);

  		__raw_writel(0x7F6E, 0x6c138); /* uart0: change dtr, rts, dcd, dsr, cts to gpio */
		__raw_writel(0x0808, 0x6c134); /* put uart0 dcd/gpio3 high */
		__raw_writel(0x0808, 0x6c130); /* uart0 dcd output */
		em86xx_msleep(50/2);

		em86xx_gpio_write(25, 1); /* LCD5V_ON */
		em86xx_msleep(50/2);

		em86xx_gpio_write(30, 1); /* LCD_DISP */
		em86xx_msleep(240); /* 160 is not enough */

		/* turn on backlight to normal */
		em86xx_gpio_write(31, 1); /* LED_SEL */ {
		int i = 5; /* we could also do 15 and LED_SET to 0 for 0.4 volt */
		while(i--) { /* output level_new rising edges */
			em86xx_gpio_write(32, 1); /* LED_SET */
			em86xx_usleep(50);
			em86xx_gpio_write(32, 0); /* LED_SET */
			em86xx_usleep(50);
		}
		em86xx_gpio_write(32, 1); /* LED_SET, wait latch time */
		em86xx_usleep(500);
		}
	#else
		/* just turn on lcd interface, everything else is hardware logic */
  		__raw_writel(0x7F6E, 0x6c138); /* uart0: change dtr, rts, dcd, dsr, cts to gpio */
		__raw_writel(0x0808, 0x6c134); /* put uart0 dcd/gpio3 high */
		__raw_writel(0x0808, 0x6c130); /* uart0 dcd output */

		/* turn on backlight to normal */
		__raw_writel(0x1073000, 0x10510);
	#endif
#endif
	return(0);
}
#endif