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/*
* Ralink RT288x SoC specific setup
*
* Copyright (C) 2008-2009 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/module.h>
#include <linux/gpio.h>
#include <asm/mach-ralink/common.h>
#include <asm/mach-ralink/rt288x.h>
#include <asm/mach-ralink/rt288x_regs.h>
unsigned long rt288x_cpu_freq;
EXPORT_SYMBOL_GPL(rt288x_cpu_freq);
unsigned long rt288x_sys_freq;
EXPORT_SYMBOL_GPL(rt288x_sys_freq);
void __iomem * rt288x_sysc_base;
void __iomem * rt288x_memc_base;
void __init rt288x_detect_sys_type(void)
{
u32 n0;
u32 n1;
u32 id;
n0 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME0);
n1 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME1);
id = rt288x_sysc_rr(SYSC_REG_CHIP_ID);
snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
"Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
(char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
(char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
(char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
(char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
(id & CHIP_ID_REV_MASK));
}
void __init rt288x_detect_sys_freq(void)
{
u32 t;
t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
switch (t) {
case SYSTEM_CONFIG_CPUCLK_250:
rt288x_cpu_freq = 250000000;
break;
case SYSTEM_CONFIG_CPUCLK_266:
rt288x_cpu_freq = 266666667;
break;
case SYSTEM_CONFIG_CPUCLK_280:
rt288x_cpu_freq = 280000000;
break;
case SYSTEM_CONFIG_CPUCLK_300:
rt288x_cpu_freq = 300000000;
break;
}
rt288x_sys_freq = rt288x_cpu_freq / 2;
}
static void rt288x_gpio_reserve(int first, int last)
{
for (; first <= last; first++)
gpio_request(first, "reserved");
}
void __init rt288x_gpio_init(u32 mode)
{
rt288x_sysc_wr(mode, SYSC_REG_GPIO_MODE);
ramips_gpio_init();
if ((mode & RT2880_GPIO_MODE_I2C) == 0)
rt288x_gpio_reserve(1, 2);
if ((mode & RT2880_GPIO_MODE_SPI) == 0)
rt288x_gpio_reserve(3, 6);
if ((mode & RT2880_GPIO_MODE_UART0) == 0)
rt288x_gpio_reserve(7, 14);
if ((mode & RT2880_GPIO_MODE_JTAG) == 0)
rt288x_gpio_reserve(17, 21);
if ((mode & RT2880_GPIO_MODE_MDIO) == 0)
rt288x_gpio_reserve(22, 23);
if ((mode & RT2880_GPIO_MODE_SDRAM) == 0)
rt288x_gpio_reserve(24, 39);
if ((mode & RT2880_GPIO_MODE_PCI) == 0)
rt288x_gpio_reserve(40, 71);
}
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