cpu_init.c

UBOOT 源码

/*
 * (C) Copyright 2003
 * Josef Baumgartner <[e-mail]>
 *
 * MCF5282 additionals
 * (C) Copyright 2005
 * BuS Elektronik GmbH & Co. KG <[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>
#include <watchdog.h>

#ifdef	CONFIG_M5271
#include <asm/m5271.h>
#include <asm/immap_5271.h>
#endif

#ifdef	CONFIG_M5272
#include <asm/m5272.h>
#include <asm/immap_5272.h>
#endif

#ifdef	CONFIG_M5282
#include <asm/m5282.h>
#include <asm/immap_5282.h>
#endif

#ifdef	CONFIG_M5249
#include <asm/m5249.h>
#endif

#if defined(CONFIG_M5271)
void cpu_init_f (void)
{
#ifndef CONFIG_WATCHDOG
	/* Disable the watchdog if we aren't using it */
	mbar_writeShort(MCF_WTM_WCR, 0);
#endif

	/* Set clockspeed to 100MHz */
	mbar_writeShort(MCF_FMPLL_SYNCR,
			MCF_FMPLL_SYNCR_MFD(0) | MCF_FMPLL_SYNCR_RFD(0));
	while (!mbar_readByte(MCF_FMPLL_SYNSR) & MCF_FMPLL_SYNSR_LOCK);

	/* Enable UART pins */
	mbar_writeShort(MCF_GPIO_PAR_UART, MCF_GPIO_PAR_UART_U0TXD |
			MCF_GPIO_PAR_UART_U0RXD |
			MCF_GPIO_PAR_UART_U1RXD_UART1 |
			MCF_GPIO_PAR_UART_U1TXD_UART1);

	/* Enable Ethernet pins */
	mbar_writeByte(MCF_GPIO_PAR_FECI2C, CFG_FECI2C);
}

/*
 * initialize higher level parts of CPU like timers
 */
int cpu_init_r	(void)
{
	return (0);
}
#endif

#if defined(CONFIG_M5272)
/*
 * Breath some life into the CPU...
 *
 * Set up the memory map,
 * initialize a bunch of registers,
 * initialize the UPM's
 */
void cpu_init_f (void)
{
	/* if we come from RAM we assume the CPU is
	 * already initialized.
	 */
#ifndef CONFIG_MONITOR_IS_IN_RAM
	volatile immap_t *regp = (immap_t *)CFG_MBAR;

	volatile unsigned char	*mbar;
	mbar = (volatile unsigned char *) CFG_MBAR;

	regp->sysctrl_reg.sc_scr = CFG_SCR;
	regp->sysctrl_reg.sc_spr = CFG_SPR;

	/* Setup Ports: */
	regp->gpio_reg.gpio_pacnt = CFG_PACNT;
	regp->gpio_reg.gpio_paddr = CFG_PADDR;
	regp->gpio_reg.gpio_padat = CFG_PADAT;
	regp->gpio_reg.gpio_pbcnt = CFG_PBCNT;
	regp->gpio_reg.gpio_pbddr = CFG_PBDDR;
	regp->gpio_reg.gpio_pbdat = CFG_PBDAT;
	regp->gpio_reg.gpio_pdcnt = CFG_PDCNT;

	/* Memory Controller: */
	regp->csctrl_reg.cs_br0 = CFG_BR0_PRELIM;
	regp->csctrl_reg.cs_or0 = CFG_OR0_PRELIM;

#if (defined(CFG_OR1_PRELIM) && defined(CFG_BR1_PRELIM))
	regp->csctrl_reg.cs_br1 = CFG_BR1_PRELIM;
	regp->csctrl_reg.cs_or1 = CFG_OR1_PRELIM;
#endif

#if defined(CFG_OR2_PRELIM) && defined(CFG_BR2_PRELIM)
	regp->csctrl_reg.cs_br2 = CFG_BR2_PRELIM;
	regp->csctrl_reg.cs_or2 = CFG_OR2_PRELIM;
#endif

#if defined(CFG_OR3_PRELIM) && defined(CFG_BR3_PRELIM)
	regp->csctrl_reg.cs_br3 = CFG_BR3_PRELIM;
	regp->csctrl_reg.cs_or3 = CFG_OR3_PRELIM;
#endif

#if defined(CFG_OR4_PRELIM) && defined(CFG_BR4_PRELIM)
	regp->csctrl_reg.cs_br4 = CFG_BR4_PRELIM;
	regp->csctrl_reg.cs_or4 = CFG_OR4_PRELIM;
#endif

#if defined(CFG_OR5_PRELIM) && defined(CFG_BR5_PRELIM)
	regp->csctrl_reg.cs_br5 = CFG_BR5_PRELIM;
	regp->csctrl_reg.cs_or5 = CFG_OR5_PRELIM;
#endif

#if defined(CFG_OR6_PRELIM) && defined(CFG_BR6_PRELIM)
	regp->csctrl_reg.cs_br6 = CFG_BR6_PRELIM;
	regp->csctrl_reg.cs_or6 = CFG_OR6_PRELIM;
#endif

#if defined(CFG_OR7_PRELIM) && defined(CFG_BR7_PRELIM)
	regp->csctrl_reg.cs_br7 = CFG_BR7_PRELIM;
	regp->csctrl_reg.cs_or7 = CFG_OR7_PRELIM;
#endif

#endif /* #ifndef CONFIG_MONITOR_IS_IN_RAM */

	/* enable instruction cache now */
	icache_enable();

}

/*
 * initialize higher level parts of CPU like timers
 */
int cpu_init_r	(void)
{
	return (0);
}
#endif /* #if defined(CONFIG_M5272) */


#ifdef	CONFIG_M5282
/*
 * Breath some life into the CPU...
 *
 * Set up the memory map,
 * initialize a bunch of registers,
 * initialize the UPM's
 */
void cpu_init_f (void)
{
#ifndef CONFIG_WATCHDOG
	/* disable watchdog if we aren't using it */
	MCFWTM_WCR = 0;
#endif

#ifndef CONFIG_MONITOR_IS_IN_RAM
	/* Set speed /PLL */
	MCFCLOCK_SYNCR =  MCFCLOCK_SYNCR_MFD(CFG_MFD) | MCFCLOCK_SYNCR_RFD(CFG_RFD);

	/* Set up the GPIO ports */
#ifdef CFG_PEPAR
	MCFGPIO_PEPAR = CFG_PEPAR;
#endif
#ifdef	CFG_PFPAR
	MCFGPIO_PFPAR = CFG_PFPAR;
#endif
#ifdef CFG_PJPAR
	MCFGPIO_PJPAR = CFG_PJPAR;
#endif
#ifdef CFG_PSDPAR
	MCFGPIO_PSDPAR = CFG_PSDPAR;
#endif
#ifdef CFG_PASPAR
	MCFGPIO_PASPAR = CFG_PASPAR;
#endif
#ifdef CFG_PEHLPAR
	MCFGPIO_PEHLPAR = CFG_PEHLPAR;
#endif
#ifdef CFG_PQSPAR
	MCFGPIO_PQSPAR = CFG_PQSPAR;
#endif
#ifdef CFG_PTCPAR
	MCFGPIO_PTCPAR = CFG_PTCPAR;
#endif
#ifdef CFG_PTDPAR
	MCFGPIO_PTDPAR = CFG_PTDPAR;
#endif
#ifdef CFG_PUAPAR
	MCFGPIO_PUAPAR = CFG_PUAPAR;
#endif

#ifdef CFG_DDRUA
	MCFGPIO_DDRUA = CFG_DDRUA;
#endif

	/* This is probably a bad place to setup chip selects, but everyone
	   else is doing it! */

#if defined(CFG_CS0_BASE) & defined(CFG_CS0_SIZE) & \
    defined(CFG_CS0_WIDTH) & defined(CFG_CS0_RO) & \
	defined(CFG_CS0_WS)

	MCFCSM_CSAR0 =	(CFG_CS0_BASE >> 16) & 0xFFFF;

	#if (CFG_CS0_WIDTH == 8)
		#define	 CFG_CS0_PS  MCFCSM_CSCR_PS_8
	#elif (CFG_CS0_WIDTH == 16)
		#define	 CFG_CS0_PS  MCFCSM_CSCR_PS_16
	#elif (CFG_CS0_WIDTH == 32)
		#define	 CFG_CS0_PS  MCFCSM_CSCR_PS_32
	#else
		#error	"CFG_CS0_WIDTH: Fault - wrong bus with for CS0"
	#endif
	MCFCSM_CSCR0 =	MCFCSM_CSCR_WS(CFG_CS0_WS)
			|CFG_CS0_PS
			|MCFCSM_CSCR_AA;

	#if (CFG_CS0_RO != 0)
		MCFCSM_CSMR0 =	MCFCSM_CSMR_BAM(CFG_CS0_SIZE-1)
				|MCFCSM_CSMR_WP|MCFCSM_CSMR_V;
 	#else
		MCFCSM_CSMR0 =	MCFCSM_CSMR_BAM(CFG_CS0_SIZE-1)|MCFCSM_CSMR_V;
	#endif
#else
	#waring "Chip Select 0 are not initialized/used"
#endif

#if defined(CFG_CS1_BASE) & defined(CFG_CS1_SIZE) & \
    defined(CFG_CS1_WIDTH) & defined(CFG_CS1_RO) & \
	defined(CFG_CS1_WS)

	MCFCSM_CSAR1 = (CFG_CS1_BASE >> 16) & 0xFFFF;

	#if (CFG_CS1_WIDTH == 8)
		#define	 CFG_CS1_PS  MCFCSM_CSCR_PS_8
	#elif (CFG_CS1_WIDTH == 16)
		#define	 CFG_CS1_PS  MCFCSM_CSCR_PS_16
	#elif (CFG_CS1_WIDTH == 32)
		#define	 CFG_CS1_PS  MCFCSM_CSCR_PS_32
	#else
		#error	"CFG_CS1_WIDTH: Fault - wrong bus with for CS1"
	#endif
	MCFCSM_CSCR1 =	MCFCSM_CSCR_WS(CFG_CS1_WS)
			|CFG_CS1_PS
			|MCFCSM_CSCR_AA;

	#if (CFG_CS1_RO != 0)
		MCFCSM_CSMR1 =	MCFCSM_CSMR_BAM(CFG_CS1_SIZE-1)
				|MCFCSM_CSMR_WP
				|MCFCSM_CSMR_V;
 	#else
		MCFCSM_CSMR1 =	MCFCSM_CSMR_BAM(CFG_CS1_SIZE-1)
				|MCFCSM_CSMR_V;
	#endif
#else
	#warning "Chip Select 1 are not initialized/used"
#endif

#if defined(CFG_CS2_BASE) & defined(CFG_CS2_SIZE) & \
    defined(CFG_CS2_WIDTH) & defined(CFG_CS2_RO) & \
	defined(CFG_CS2_WS)

	MCFCSM_CSAR2 = (CFG_CS2_BASE >> 16) & 0xFFFF;

	#if (CFG_CS2_WIDTH == 8)
		#define	 CFG_CS2_PS  MCFCSM_CSCR_PS_8
	#elif (CFG_CS2_WIDTH == 16)
		#define	 CFG_CS2_PS  MCFCSM_CSCR_PS_16
	#elif (CFG_CS2_WIDTH == 32)
		#define	 CFG_CS2_PS  MCFCSM_CSCR_PS_32
	#else
		#error	"CFG_CS2_WIDTH: Fault - wrong bus with for CS2"
	#endif
	MCFCSM_CSCR2 =	MCFCSM_CSCR_WS(CFG_CS2_WS)
			|CFG_CS2_PS
			|MCFCSM_CSCR_AA;

	#if (CFG_CS2_RO != 0)
		MCFCSM_CSMR2 =	MCFCSM_CSMR_BAM(CFG_CS2_SIZE-1)
				|MCFCSM_CSMR_WP
				|MCFCSM_CSMR_V;
 	#else
		MCFCSM_CSMR2 =	MCFCSM_CSMR_BAM(CFG_CS2_SIZE-1)
				|MCFCSM_CSMR_V;
	#endif
#else
	#warning "Chip Select 2 are not initialized/used"
#endif

#if defined(CFG_CS3_BASE) & defined(CFG_CS3_SIZE) & \
    defined(CFG_CS3_WIDTH) & defined(CFG_CS3_RO) & \
	defined(CFG_CS3_WS)

	MCFCSM_CSAR3 = (CFG_CS3_BASE >> 16) & 0xFFFF;

	#if (CFG_CS3_WIDTH == 8)
		#define	 CFG_CS3_PS  MCFCSM_CSCR_PS_8
	#elif (CFG_CS3_WIDTH == 16)
		#define	 CFG_CS3_PS  MCFCSM_CSCR_PS_16
	#elif (CFG_CS3_WIDTH == 32)
		#define	 CFG_CS3_PS  MCFCSM_CSCR_PS_32
	#else
		#error	"CFG_CS3_WIDTH: Fault - wrong bus with for CS1"
	#endif
	MCFCSM_CSCR3 =	MCFCSM_CSCR_WS(CFG_CS3_WS)
			|CFG_CS3_PS
			|MCFCSM_CSCR_AA;

	#if (CFG_CS3_RO != 0)
		MCFCSM_CSMR3 =	MCFCSM_CSMR_BAM(CFG_CS3_SIZE-1)
				|MCFCSM_CSMR_WP
				|MCFCSM_CSMR_V;
 	#else
		MCFCSM_CSMR3 =	MCFCSM_CSMR_BAM(CFG_CS3_SIZE-1)
				|MCFCSM_CSMR_V;
	#endif
#else
	#warning "Chip Select 3 are not initialized/used"
#endif

#endif /* CONFIG_MONITOR_IS_IN_RAM */

	/* defer enabling cache until boot (see do_go) */
	/* icache_enable(); */
}

/*
 * initialize higher level parts of CPU like timers
 */
int cpu_init_r	(void)
{
	return (0);
}
#endif

#if defined(CONFIG_M5249)
/*
 * Breath some life into the CPU...
 *
 * Set up the memory map,
 * initialize a bunch of registers,
 * initialize the UPM's
 */
void cpu_init_f (void)
{
#ifndef CFG_PLL_BYPASS
	/*
	 *  Setup the PLL to run at the specified speed
	 *
	 */
	volatile unsigned long cpll = mbar2_readLong(MCFSIM_PLLCR);
	unsigned long pllcr;
#ifdef CFG_FAST_CLK
	pllcr = 0x925a3100;			  /* ~140MHz clock (PLL bypass = 0) */
#else
	pllcr = 0x135a4140;			  /* ~72MHz clock (PLL bypass = 0) */
#endif
	cpll = cpll & 0xfffffffe;		  /* Set PLL bypass mode = 0 (PSTCLK = crystal) */
	mbar2_writeLong(MCFSIM_PLLCR, cpll);	  /* Set the PLL to bypass mode (PSTCLK = crystal) */
	mbar2_writeLong(MCFSIM_PLLCR, pllcr);	  /* set the clock speed */
	pllcr ^= 0x00000001;			  /* Set pll bypass to 1 */
	mbar2_writeLong(MCFSIM_PLLCR, pllcr);	  /* Start locking (pll bypass = 1) */
	udelay(0x20);				  /* Wait for a lock ... */
#endif /* #ifndef CFG_PLL_BYPASS */

	/*
	 *  NOTE: by setting the GPIO_FUNCTION registers, we ensure that the UART pins
	 *	  (UART0: gpio 30,27, UART1: gpio 31, 28) will be used as UART pins
	 *	  which is their primary function.
	 *	  ~Jeremy
	 */
	mbar2_writeLong(MCFSIM_GPIO_FUNC, CFG_GPIO_FUNC);
	mbar2_writeLong(MCFSIM_GPIO1_FUNC, CFG_GPIO1_FUNC);
	mbar2_writeLong(MCFSIM_GPIO_EN, CFG_GPIO_EN);
	mbar2_writeLong(MCFSIM_GPIO1_EN, CFG_GPIO1_EN);
	mbar2_writeLong(MCFSIM_GPIO_OUT, CFG_GPIO_OUT);
	mbar2_writeLong(MCFSIM_GPIO1_OUT, CFG_GPIO1_OUT);

	/*
	 *  dBug Compliance:
	 *    You can verify these values by using dBug's 'ird'
	 *    (Internal Register Display) command
	 *    ~Jeremy
	 *
	 */
	mbar_writeByte(MCFSIM_MPARK, 0x30);    /* 5249 Internal Core takes priority over DMA */
	mbar_writeByte(MCFSIM_SYPCR, 0x00);
	mbar_writeByte(MCFSIM_SWIVR, 0x0f);
	mbar_writeByte(MCFSIM_SWSR, 0x00);
	mbar_writeLong(MCFSIM_IMR, 0xfffffbff);
	mbar_writeByte(MCFSIM_SWDICR, 0x00);
	mbar_writeByte(MCFSIM_TIMER1ICR, 0x00);
	mbar_writeByte(MCFSIM_TIMER2ICR, 0x88);
	mbar_writeByte(MCFSIM_I2CICR, 0x00);
	mbar_writeByte(MCFSIM_UART1ICR, 0x00);
	mbar_writeByte(MCFSIM_UART2ICR, 0x00);
	mbar_writeByte(MCFSIM_ICR6, 0x00);
	mbar_writeByte(MCFSIM_ICR7, 0x00);
	mbar_writeByte(MCFSIM_ICR8, 0x00);
	mbar_writeByte(MCFSIM_ICR9, 0x00);
	mbar_writeByte(MCFSIM_QSPIICR, 0x00);

	mbar2_writeLong(MCFSIM_GPIO_INT_EN, 0x00000080);
	mbar2_writeByte(MCFSIM_INTBASE, 0x40);	/* Base interrupts at 64 */
	mbar2_writeByte(MCFSIM_SPURVEC, 0x00);
	mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020);	 /* Enable a 1 cycle pre-drive cycle on CS1 */

	/* Setup interrupt priorities for gpio7 */
	/* mbar2_writeLong(MCFSIM_INTLEV5, 0x70000000); */

	/* IDE Config registers */
	mbar2_writeLong(MCFSIM_IDECONFIG1, 0x00000020);
	mbar2_writeLong(MCFSIM_IDECONFIG2, 0x00000000);

	/*
	 *  Setup chip selects...
	 */

	mbar_writeShort(MCFSIM_CSAR1, CFG_CSAR1);
	mbar_writeShort(MCFSIM_CSCR1, CFG_CSCR1);
	mbar_writeLong(MCFSIM_CSMR1, CFG_CSMR1);

	mbar_writeShort(MCFSIM_CSAR0, CFG_CSAR0);
	mbar_writeShort(MCFSIM_CSCR0, CFG_CSCR0);
	mbar_writeLong(MCFSIM_CSMR0, CFG_CSMR0);

	/* enable instruction cache now */
	icache_enable();
}

/*
 * initialize higher level parts of CPU like timers
 */
int cpu_init_r	(void)
{
	return (0);
}
#endif /* #if defined(CONFIG_M5249) */