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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
*
* (C) Copyright 2003
* Texas Instruments, <www.ti.com>
* Kshitij Gupta <Kshitij@ti.com>
*
* (C) Copyright 2004
* ARM Ltd.
* Philippe Robin, <philippe.robin@arm.com>
*
* 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 <netdev.h>
#include <asm/io.h>
#include <asm/arch/systimer.h>
#include <asm/arch/sysctrl.h>
#include <asm/arch/wdt.h>
static ulong timestamp;
static ulong lastdec;
static struct wdt *wdt_base = (struct wdt *)WDT_BASE;
static struct systimer *systimer_base = (struct systimer *)SYSTIMER_BASE;
static struct sysctrl *sysctrl_base = (struct sysctrl *)SCTL_BASE;
static void flash__init(void);
static void vexpress_timer_init(void);
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_SHOW_BOOT_PROGRESS)
void show_boot_progress(int progress)
{
printf("Boot reached stage %d\n", progress);
}
#endif
static inline void delay(ulong loops)
{
__asm__ volatile ("1:\n"
"subs %0, %1, #1\n"
"bne 1b" : "=r" (loops) : "0" (loops));
}
int board_init(void)
{
gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
gd->bd->bi_arch_number = MACH_TYPE_VEXPRESS;
gd->flags = 0;
icache_enable();
flash__init();
vexpress_timer_init();
return 0;
}
int board_eth_init(bd_t *bis)
{
int rc = 0;
#ifdef CONFIG_SMC911X
rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
#endif
return rc;
}
static void flash__init(void)
{
/* Setup the sytem control register to allow writing to flash */
writel(readl(&sysctrl_base->scflashctrl) | VEXPRESS_FLASHPROG_FLVPPEN,
&sysctrl_base->scflashctrl);
}
int dram_init(void)
{
gd->ram_size = get_ram_size(CONFIG_SYS_SDRAM_BASE, PHYS_SDRAM_1_SIZE);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = get_ram_size(PHYS_SDRAM_1, PHYS_SDRAM_1_SIZE);
gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
gd->bd->bi_dram[1].size = get_ram_size(PHYS_SDRAM_2, PHYS_SDRAM_2_SIZE);
}
int timer_init(void)
{
return 0;
}
/*
* Start timer:
* Setup a 32 bit timer, running at 1KHz
* Versatile Express Motherboard provides 1 MHz timer
*/
static void vexpress_timer_init(void)
{
/*
* Set clock frequency in system controller:
* VEXPRESS_REFCLK is 32KHz
* VEXPRESS_TIMCLK is 1MHz
*/
writel(SP810_TIMER0_ENSEL | SP810_TIMER1_ENSEL |
SP810_TIMER2_ENSEL | SP810_TIMER3_ENSEL |
readl(&sysctrl_base->scctrl), &sysctrl_base->scctrl);
/*
* Set Timer0 to be:
* Enabled, free running, no interrupt, 32-bit, wrapping
*/
writel(SYSTIMER_RELOAD, &systimer_base->timer0load);
writel(SYSTIMER_RELOAD, &systimer_base->timer0value);
writel(SYSTIMER_EN | SYSTIMER_32BIT | \
readl(&systimer_base->timer0control), \
&systimer_base->timer0control);
reset_timer_masked();
}
/* Use the ARM Watchdog System to cause reset */
void reset_cpu(ulong addr)
{
writeb(WDT_EN, &wdt_base->wdogcontrol);
writel(WDT_RESET_LOAD, &wdt_base->wdogload);
while (1)
;
}
/*
* Delay x useconds AND perserve advance timstamp value
* assumes timer is ticking at 1 msec
*/
void udelay(ulong usec)
{
ulong tmo, tmp;
tmo = usec / 1000;
tmp = get_timer(0); /* get current timestamp */
/*
* If setting this forward will roll time stamp then
* reset "advancing" timestamp to 0 and set lastdec value
* otherwise set the advancing stamp to the wake up time
*/
if ((tmo + tmp + 1) < tmp)
reset_timer_masked();
else
tmo += tmp;
while (get_timer_masked() < tmo)
; /* loop till wakeup event */
}
ulong get_timer(ulong base)
{
return get_timer_masked() - base;
}
void reset_timer_masked(void)
{
lastdec = readl(&systimer_base->timer0value) / 1000;
timestamp = 0;
}
void reset_timer(void)
{
reset_timer_masked();
}
ulong get_timer_masked(void)
{
ulong now = readl(&systimer_base->timer0value) / 1000;
if (lastdec >= now) { /* normal mode (non roll) */
timestamp += lastdec - now;
} else { /* count down timer overflowed */
/*
* nts = ts + ld - now
* ts = old stamp, ld = time before passing through - 1
* now = amount of time after passing though - 1
* nts = new "advancing time stamp"
*/
timestamp += lastdec + SYSTIMER_RELOAD - now;
}
lastdec = now;
return timestamp;
}
void lowlevel_init(void)
{
}
ulong get_board_rev(void){
return readl((u32 *)SYS_ID);
}
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