101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
|
|
* Ralink RT288x SoC specific setup
|
|
*
|
|
* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
|
|
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
|
*
|
|
* Parts of this file are based on Ralink's 2.6.21 BSP
|
|
*
|
|
* 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 <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/serial_8250.h>
|
|
|
|
#include <asm/mips_machine.h>
|
|
#include <asm/reboot.h>
|
|
#include <asm/time.h>
|
|
|
|
#include <asm/mach-ralink/common.h>
|
|
#include <asm/mach-ralink/rt288x.h>
|
|
#include <asm/mach-ralink/rt288x_regs.h>
|
|
|
|
static void rt288x_restart(char *command)
|
|
{
|
|
rt288x_sysc_wr(RT2880_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
|
|
while (1)
|
|
if (cpu_wait)
|
|
cpu_wait();
|
|
}
|
|
|
|
static void rt288x_halt(void)
|
|
{
|
|
while (1)
|
|
cpu_wait();
|
|
}
|
|
|
|
static void __init rt288x_early_serial_setup(void)
|
|
{
|
|
struct uart_port p;
|
|
int err;
|
|
|
|
memset(&p, 0, sizeof(p));
|
|
p.flags = UPF_SKIP_TEST;
|
|
p.iotype = UPIO_AU;
|
|
p.uartclk = rt288x_sys_freq;
|
|
p.regshift = 2;
|
|
p.type = PORT_16550A;
|
|
|
|
p.mapbase = RT2880_UART0_BASE;
|
|
p.membase = ioremap_nocache(p.mapbase, RT2880_UART0_SIZE);
|
|
p.line = 0;
|
|
p.irq = RT2880_INTC_IRQ_UART0;
|
|
|
|
err = early_serial_setup(&p);
|
|
if (err)
|
|
printk(KERN_ERR "RT288x: early UART0 registration failed %d\n",
|
|
err);
|
|
|
|
p.mapbase = RT2880_UART1_BASE;
|
|
p.membase = ioremap_nocache(p.mapbase, RT2880_UART1_SIZE);
|
|
p.line = 1;
|
|
p.irq = RT2880_INTC_IRQ_UART1;
|
|
|
|
err = early_serial_setup(&p);
|
|
if (err)
|
|
printk(KERN_ERR "RT288x: early UART1 registration failed %d\n",
|
|
err);
|
|
}
|
|
|
|
unsigned int __cpuinit get_c0_compare_irq(void)
|
|
{
|
|
return CP0_LEGACY_COMPARE_IRQ;
|
|
}
|
|
|
|
void __init ramips_soc_setup(void)
|
|
{
|
|
rt288x_sysc_base = ioremap_nocache(RT2880_SYSC_BASE, RT2880_SYSC_SIZE);
|
|
rt288x_memc_base = ioremap_nocache(RT2880_MEMC_BASE, RT2880_MEMC_SIZE);
|
|
|
|
rt288x_detect_sys_type();
|
|
rt288x_detect_sys_freq();
|
|
|
|
printk(KERN_INFO "%s running at %lu.%02lu MHz\n", ramips_sys_type,
|
|
rt288x_cpu_freq / 1000000,
|
|
(rt288x_cpu_freq % 1000000) * 100 / 1000000);
|
|
|
|
_machine_restart = rt288x_restart;
|
|
_machine_halt = rt288x_halt;
|
|
pm_power_off = rt288x_halt;
|
|
|
|
rt288x_early_serial_setup();
|
|
}
|
|
|
|
void __init plat_time_init(void)
|
|
{
|
|
mips_hpt_frequency = rt288x_cpu_freq / 2;
|
|
}
|