omap5912osk.c

嵌入式试验箱S3C2410的bootloader源代码

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * (C) Copyright 2002
 * David Mueller, ELSOFT AG, <[e-mail]>
 *
 * (C) Copyright 2003
 * Texas Instruments, <www.ti.com>
 * Kshitij Gupta <[e-mail]>
 *
 * (C) Copyright 2004
 * Texas Instruments, <www.ti.com>
 * Rishi Bhattacharya <[e-mail]>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 <common.h>
#if defined(CONFIG_OMAP1610)
#include <./configs/omap1510.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

void flash__init (void);
void ether__init (void);
void set_muxconf_regs (void);
void peripheral_power_enable (void);

#define COMP_MODE_ENABLE ((unsigned int)0x0000EAEF)

static inline void delay (unsigned long loops)
{
	__asm__ volatile ("1:\n"
		"subs %0, %1, #1\n"
		"bne 1b":"=r" (loops):"0" (loops));
}

/*
 * Miscellaneous platform dependent initialisations
 */

int board_init (void)
{
	gd->bd->bi_arch_number = MACH_TYPE_OMAP_OSK;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0x10000100;

	/* Configure MUX settings */
	set_muxconf_regs ();
	peripheral_power_enable ();

/* this speeds up your boot a quite a bit.  However to make it
 *  work, you need make sure your kernel startup flush bug is fixed.
 *  ... rkw ...
 */
	icache_enable ();

	flash__init ();
	ether__init ();
	return 0;
}


int misc_init_r (void)
{
	/* currently empty */
	return (0);
}

/******************************
 Routine:
 Description:
******************************/
void flash__init (void)
{
#define EMIFS_GlB_Config_REG 0xfffecc0c
	unsigned int regval;
	regval = *((volatile unsigned int *) EMIFS_GlB_Config_REG);
	/* Turn off write protection for flash devices. */
	regval = regval | 0x0001;
	*((volatile unsigned int *) EMIFS_GlB_Config_REG) = regval;
}
/*************************************************************
 Routine:ether__init
 Description: take the Ethernet controller out of reset and wait
			   for the EEPROM load to complete.
*************************************************************/
void ether__init (void)
{
#define ETH_CONTROL_REG 0x0480000b
	int i;

	*((volatile unsigned short *) 0xfffece08) = 0x03FF;
	*((volatile unsigned short *) 0xfffb3824) = 0x8000;
	*((volatile unsigned short *) 0xfffb3830) = 0x0000;
	*((volatile unsigned short *) 0xfffb3834) = 0x0009;
	*((volatile unsigned short *) 0xfffb3838) = 0x0009;
	*((volatile unsigned short *) 0xfffb3818) = 0x0002;
	*((volatile unsigned short *) 0xfffb382C) = 0x0048;
	*((volatile unsigned short *) 0xfffb3824) = 0x8603;
	udelay (3);
	for (i=0;i<2000;i++);
	*((volatile unsigned short *) 0xfffb381C) = 0x6610;
	udelay (30);
	for (i=0;i<10000;i++);

	*((volatile unsigned char *) ETH_CONTROL_REG) &= ~0x01;
	udelay (3);


}

/******************************
 Routine:
 Description:
******************************/
int dram_init (void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;

	return 0;
}

/******************************************************
 Routine: set_muxconf_regs
 Description: Setting up the configuration Mux registers
			  specific to the hardware
*******************************************************/
void set_muxconf_regs (void)
{
	volatile unsigned int *MuxConfReg;
	/* set each registers to its reset value; */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_0);
	/* setup for UART1 */
	*MuxConfReg &= ~(0x02000000);	/* bit 25 */
	/* setup for UART2 */
	*MuxConfReg &= ~(0x01000000);	/* bit 24 */
	/* Disable Uwire CS Hi-Z */
	*MuxConfReg |= 0x08000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_3);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_4);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_5);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_6);
	/*setup mux for UART3 */
	*MuxConfReg |= 0x00000001;	/* bit3, 1, 0 (mux0 5,5,26) */
	*MuxConfReg &= ~0x0000003e;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_7);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_8);
	/* Disable Uwire CS Hi-Z */
	*MuxConfReg |= 0x00001200;	/*bit 9 for CS0 12 for CS3 */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_9);
	/*  Need to turn on bits 21 and 12 in FUNC_MUX_CTRL_9 so the  */
	/*  hardware will actually use TX and RTS based on bit 25 in  */
	/*  FUNC_MUX_CTRL_0.  I told you this thing was screwy!	 */
	*MuxConfReg |= 0x00201000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_A);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_B);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_C);
	/* setup for UART2 */
	/*  Need to turn on bits 27 and 24 in FUNC_MUX_CTRL_C so the  */
	/*  hardware will actually use TX and RTS based on bit 24 in  */
	/*  FUNC_MUX_CTRL_0. */
	*MuxConfReg |= 0x09000000;
	MuxConfReg =
	(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_D);
	*MuxConfReg |= 0x00000020;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PULL_DWN_CTRL_0);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PULL_DWN_CTRL_1);
	*MuxConfReg = 0x00000000;
	/* mux setup for SD/MMC driver */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PULL_DWN_CTRL_2);
	*MuxConfReg &= 0xFFFE0FFF;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PULL_DWN_CTRL_3);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) MOD_CONF_CTRL_0);
	/* bit 13 for MMC2 XOR_CLK */
	*MuxConfReg &= ~(0x00002000);
	/* bit 29 for UART 1 */
	*MuxConfReg &= ~(0x00002000);
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) FUNC_MUX_CTRL_0);
	/* Configure for USB. Turn on VBUS_CTRL and VBUS_MODE. */
	*MuxConfReg |= 0x000C0000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int)USB_TRANSCEIVER_CTRL);
	*MuxConfReg &= ~(0x00000070);
	*MuxConfReg &= ~(0x00000008);
	*MuxConfReg |= 0x00000003;
	*MuxConfReg |= 0x00000180;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) MOD_CONF_CTRL_0);
	/* bit 17, software controls VBUS */
	*MuxConfReg &= ~(0x00020000);
	/* Enable USB 48 and 12M clocks */
	*MuxConfReg |= 0x00000200;
	*MuxConfReg &= ~(0x00000180);
	/*2.75V for MMCSDIO1 */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) VOLTAGE_CTRL_0);
	*MuxConfReg = 0x00001FE7;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_0);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_1);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_2);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_3);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_4);
	*MuxConfReg = 0x00000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PULL_DWN_CTRL_4);
	*MuxConfReg = 0x00000000;
	/* Turn on UART2 48 MHZ clock */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) MOD_CONF_CTRL_0);
	*MuxConfReg |= 0x40000000;
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) USB_OTG_CTRL);
	/* setup for USB VBus detection OMAP161x */
	*MuxConfReg |= 0x00040000;	/* bit 18 */
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int) PU_PD_SEL_2);
	/* PullUps for SD/MMC driver */
	*MuxConfReg |= ~(0xFFFE0FFF);
	MuxConfReg =
		(volatile unsigned int *) ((unsigned int)COMP_MODE_CTRL_0);
	*MuxConfReg = COMP_MODE_ENABLE;
}

/******************************************************
 Routine: peripheral_power_enable
 Description: Enable the power for UART1
*******************************************************/
void peripheral_power_enable (void)
{
#define UART1_48MHZ_ENABLE	((unsigned short)0x0200)
#define SW_CLOCK_REQUEST	((volatile unsigned short *)0xFFFE0834)

	*SW_CLOCK_REQUEST |= UART1_48MHZ_ENABLE;
}

/*
 * Check Board Identity
 */
int checkboard(void)
{
	char *s = getenv("serial#");

	puts("Board: OSK5912");

	if (s != NULL) {
		puts(", serial# ");
		puts(s);
	}
	putc('\n');

	return (0);
}