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/*
* (C) Copyright 2008
* Graeme Russ, graeme.russ@gmail.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 <asm/io.h>
#include <asm/ic/sc520.h>
#include <net.h>
#include <netdev.h>
#ifdef CONFIG_HW_WATCHDOG
#include <watchdog.h>
#endif
#include "hardware.h"
DECLARE_GLOBAL_DATA_PTR;
#undef SC520_CDP_DEBUG
#ifdef SC520_CDP_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
unsigned long monitor_flash_len = CONFIG_SYS_MONITOR_LEN;
static void enet_timer_isr(void);
static void enet_toggle_run_led(void);
/*
* Miscellaneous platform dependent initializations
*/
int board_early_init_f(void)
{
writeb(0x01, &sc520_mmcr->gpcsrt); /* GP Chip Select Recovery Time */
writeb(0x07, &sc520_mmcr->gpcspw); /* GP Chip Select Pulse Width */
writeb(0x00, &sc520_mmcr->gpcsoff); /* GP Chip Select Offset */
writeb(0x05, &sc520_mmcr->gprdw); /* GP Read pulse width */
writeb(0x01, &sc520_mmcr->gprdoff); /* GP Read offset */
writeb(0x05, &sc520_mmcr->gpwrw); /* GP Write pulse width */
writeb(0x01, &sc520_mmcr->gpwroff); /* GP Write offset */
writew(0x0630, &sc520_mmcr->piodata15_0); /* PIO15_PIO0 Data */
writew(0x2000, &sc520_mmcr->piodata31_16); /* PIO31_PIO16 Data */
writew(0x2000, &sc520_mmcr->piodir31_16); /* GPIO Direction */
writew(0x87b5, &sc520_mmcr->piodir15_0); /* GPIO Direction */
writew(0x0dfe, &sc520_mmcr->piopfs31_16); /* GPIO pin function 31-16 reg */
writew(0x200a, &sc520_mmcr->piopfs15_0); /* GPIO pin function 15-0 reg */
writeb(0xf8, &sc520_mmcr->cspfs); /* Chip Select Pin Function Select */
writel(0x200713f8, &sc520_mmcr->par[2]); /* Uart A (GPCS0, 0x013f8, 8 Bytes) */
writel(0x2c0712f8, &sc520_mmcr->par[3]); /* Uart B (GPCS3, 0x012f8, 8 Bytes) */
writel(0x300711f8, &sc520_mmcr->par[4]); /* Uart C (GPCS4, 0x011f8, 8 Bytes) */
writel(0x340710f8, &sc520_mmcr->par[5]); /* Uart D (GPCS5, 0x010f8, 8 Bytes) */
writel(0xe3ffc000, &sc520_mmcr->par[6]); /* SDRAM (0x00000000, 128MB) */
writel(0xaa3fd000, &sc520_mmcr->par[7]); /* StrataFlash (ROMCS1, 0x10000000, 16MB) */
writel(0xca3fd100, &sc520_mmcr->par[8]); /* StrataFlash (ROMCS2, 0x11000000, 16MB) */
writel(0x4203d900, &sc520_mmcr->par[9]); /* SRAM (GPCS0, 0x19000000, 1MB) */
writel(0x4e03d910, &sc520_mmcr->par[10]); /* SRAM (GPCS3, 0x19100000, 1MB) */
writel(0x50018100, &sc520_mmcr->par[11]); /* DP-RAM (GPCS4, 0x18100000, 4kB) */
writel(0x54020000, &sc520_mmcr->par[12]); /* CFLASH1 (0x200000000, 4kB) */
writel(0x5c020001, &sc520_mmcr->par[13]); /* CFLASH2 (0x200010000, 4kB) */
/* writel(0x8bfff800, &sc520_mmcr->par14); */ /* BOOTCS at 0x18000000 */
/* writel(0x38201000, &sc520_mmcr->par15); */ /* LEDs etc (GPCS6, 0x1000, 20 Bytes */
/* Disable Watchdog */
writew(0x3333, &sc520_mmcr->wdtmrctl);
writew(0xcccc, &sc520_mmcr->wdtmrctl);
writew(0x0000, &sc520_mmcr->wdtmrctl);
/* Chip Select Configuration */
writew(0x0033, &sc520_mmcr->bootcsctl);
writew(0x0615, &sc520_mmcr->romcs1ctl);
writew(0x0615, &sc520_mmcr->romcs2ctl);
/*
* Set the timer pin mapping
* no clock frequency selected, use 1.1892MHz
*/
writeb(0x72, &sc520_mmcr->clksel);
writeb(0x00, &sc520_mmcr->adddecctl);
writeb(0x07, &sc520_mmcr->uart1ctl);
writeb(0x07, &sc520_mmcr->uart2ctl);
writeb(0x06, &sc520_mmcr->sysarbctl);
writew(0x0003, &sc520_mmcr->sysarbmenb);
/* enable posted-writes */
writeb(0x04, &sc520_mmcr->hbctl);
return 0;
}
int board_early_init_r(void)
{
/* CPU Speed to 100MHz */
gd->cpu_clk = 100000000;
/* Crystal is 33.000MHz */
gd->bus_clk = 33000000;
return 0;
}
int dram_init(void)
{
init_sc520_dram();
return 0;
}
void show_boot_progress(int val)
{
uchar led_mask;
led_mask = 0x00;
if (val < 0)
led_mask |= LED_ERR_BITMASK;
led_mask |= (uchar)(val & 0x001f);
outb(led_mask, LED_LATCH_ADDRESS);
}
int last_stage_init(void)
{
int minor;
int major;
major = minor = 0;
outb(0x00, LED_LATCH_ADDRESS);
register_timer_isr (enet_timer_isr);
printf("Serck Controls eNET\n");
return 0;
}
ulong board_flash_get_legacy (ulong base, int banknum, flash_info_t * info)
{
if (banknum == 0) { /* non-CFI boot flash */
info->portwidth = FLASH_CFI_8BIT;
info->chipwidth = FLASH_CFI_BY8;
info->interface = FLASH_CFI_X8;
return 1;
} else
return 0;
}
int board_eth_init(bd_t *bis)
{
return pci_eth_init(bis);
}
void setup_pcat_compatibility()
{
/* disable global interrupt mode */
writeb(0x40, &sc520_mmcr->picicr);
/* set all irqs to edge */
writeb(0x00, &sc520_mmcr->pic_mode[0]);
writeb(0x00, &sc520_mmcr->pic_mode[1]);
writeb(0x00, &sc520_mmcr->pic_mode[2]);
/*
* active low polarity on PIC interrupt pins,
* active high polarity on all other irq pins
*/
writew(0x0000,&sc520_mmcr->intpinpol);
/*
* PIT 0 -> IRQ0
* RTC -> IRQ8
* FP error -> IRQ13
* UART1 -> IRQ4
* UART2 -> IRQ3
*/
writeb(SC520_IRQ0, &sc520_mmcr->pit_int_map[0]);
writeb(SC520_IRQ8, &sc520_mmcr->rtcmap);
writeb(SC520_IRQ13, &sc520_mmcr->ferrmap);
writeb(SC520_IRQ4, &sc520_mmcr->uart_int_map[0]);
writeb(SC520_IRQ3, &sc520_mmcr->uart_int_map[1]);
/* Disable all other interrupt sources */
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[0]);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[1]);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[2]);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[1]);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[2]);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->ssimap);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wdtmap);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wpvmap);
writeb(SC520_IRQ_DISABLED, &sc520_mmcr->icemap);
}
void enet_timer_isr(void)
{
static long enet_ticks = 0;
enet_ticks++;
/* Toggle Watchdog every 100ms */
if ((enet_ticks % 100) == 0)
hw_watchdog_reset();
/* Toggle Run LED every 500ms */
if ((enet_ticks % 500) == 0)
enet_toggle_run_led();
}
void hw_watchdog_reset(void)
{
/* Watchdog Reset must be atomic */
long flag = disable_interrupts();
if (sc520_mmcr->piodata15_0 & WATCHDOG_PIO_BIT)
sc520_mmcr->pioclr15_0 = WATCHDOG_PIO_BIT;
else
sc520_mmcr->pioset15_0 = WATCHDOG_PIO_BIT;
if (flag)
enable_interrupts();
}
void enet_toggle_run_led(void)
{
unsigned char leds_state= inb(LED_LATCH_ADDRESS);
if (leds_state & LED_RUN_BITMASK)
outb(leds_state &~ LED_RUN_BITMASK, LED_LATCH_ADDRESS);
else
outb(leds_state | LED_RUN_BITMASK, LED_LATCH_ADDRESS);
}
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