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/*
* BCM63XX specific implementation parts
*
* Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <stddef.h>
#include "config.h"
#include "cp0regdef.h"
#define READREG(r) *(volatile unsigned int *)(r)
#define WRITEREG(r,v) *(volatile unsigned int *)(r) = v
#define UART_IR_REG 0x10
#define UART_FIFO_REG 0x14
unsigned long uart_base;
static void wait_xfered(void)
{
unsigned int val;
do {
val = READREG(uart_base + UART_IR_REG);
if (val & (1 << 5))
break;
} while (1);
}
void board_putc(int ch)
{
if (!uart_base)
return;
wait_xfered();
WRITEREG(uart_base + UART_FIFO_REG, ch);
wait_xfered();
}
#define PRID_IMP_BMIPS32_REV4 0x4000
#define PRID_IMP_BMIPS32_REV8 0x8000
#define PRID_IMP_BMIPS3300 0x9000
#define PRID_IMP_BMIPS3300_ALT 0x9100
#define PRID_IMP_BMIPS3300_BUG 0x0000
#define PRID_IMP_BMIPS43XX 0xa000
void board_init(void)
{
unsigned long prid, chipid, chipid_reg;
prid = read_32bit_c0_register($15, 0);
switch (prid & 0xff00) {
case PRID_IMP_BMIPS32_REV4:
case PRID_IMP_BMIPS32_REV8:
case PRID_IMP_BMIPS3300_ALT:
case PRID_IMP_BMIPS3300_BUG:
chipid_reg = 0xfffe0000;
break;
case PRID_IMP_BMIPS3300:
if ((prid & 0xff) >= 0x33)
chipid_reg = 0xb0000000;
else
chipid_reg = 0xfffe0000;
break;
case PRID_IMP_BMIPS43XX:
if ((prid & 0xff) == 0x04)
chipid_reg = 0xfff8c000;
else if ((prid & 0xff) >= 0x30)
chipid_reg = 0xb0000000;
else
chipid_reg = 0xfffe0000;
break;
default:
return;
}
chipid = READREG(chipid_reg);
switch (chipid >> 16) {
case 0x3368:
case 0x6318:
case 0x6328:
case 0x6358:
case 0x6362:
case 0x6368:
case 0x6369:
uart_base = chipid_reg + 0x100;
break;
case 0x6316:
case 0x6326:
uart_base = chipid_reg + 0x180;
break;
case 0x6338:
case 0x6345:
case 0x6348:
uart_base = chipid_reg + 0x300;
break;
default:
return;
}
}
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