mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-28 20:15:18 +02:00
be7ba8de2f
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17456 3c298f89-4303-0410-b956-a3cf2f4a3e73
146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
/*
|
|
* Ralink RT305x SoC specific prom routines
|
|
*
|
|
* Copyright (C) 2009 Gabor Juhos <juhosg@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 <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
#include <asm/mach-ralink/common.h>
|
|
#include <asm/mach-ralink/machine.h>
|
|
#include <asm/mach-ralink/rt305x.h>
|
|
#include <asm/mach-ralink/rt305x_regs.h>
|
|
|
|
struct board_rec {
|
|
char *name;
|
|
enum ramips_mach_type mach_type;
|
|
};
|
|
|
|
static int rt305x_prom_argc __initdata;
|
|
static char **rt305x_prom_argv __initdata;
|
|
static char **rt305x_prom_envp __initdata;
|
|
|
|
static struct board_rec boards[] __initdata = {
|
|
{
|
|
.name = "WHR-G300N",
|
|
.mach_type = RAMIPS_MACH_WHR_G300N,
|
|
}
|
|
};
|
|
|
|
static inline void *to_ram_addr(void *addr)
|
|
{
|
|
u32 base;
|
|
|
|
base = KSEG0ADDR(RT305X_SDRAM_BASE);
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RT305X_MEM_SIZE_MAX)))
|
|
return addr;
|
|
|
|
base = KSEG1ADDR(RT305X_SDRAM_BASE);
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RT305X_MEM_SIZE_MAX)))
|
|
return addr;
|
|
|
|
/* some U-Boot variants uses physical addresses */
|
|
base = RT305X_SDRAM_BASE;
|
|
if (((u32) addr > base) &&
|
|
((u32) addr < (base + RT305X_MEM_SIZE_MAX)))
|
|
return (void *)KSEG0ADDR(addr);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static __init char *rt305x_prom_getargv(const char *name)
|
|
{
|
|
int len = strlen(name);
|
|
int i;
|
|
|
|
if (!rt305x_prom_argv) {
|
|
printk(KERN_DEBUG "argv=%p is invalid, skipping\n",
|
|
rt305x_prom_argv);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < rt305x_prom_argc; i++) {
|
|
char *argv = to_ram_addr(rt305x_prom_argv[i]);
|
|
|
|
if (!argv) {
|
|
printk(KERN_DEBUG
|
|
"argv[%d]=%p is invalid, skipping\n",
|
|
i, rt305x_prom_argv[i]);
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_DEBUG "argv[i]: %s\n", argv);
|
|
if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
|
|
return argv + len + 1;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static __init char *rt305x_prom_getenv(const char *envname)
|
|
{
|
|
int len = strlen(envname);
|
|
char **env;
|
|
char *p;
|
|
|
|
env = rt305x_prom_envp;
|
|
if (!env) {
|
|
printk(KERN_DEBUG "envp=%p is not in RAM, skipping\n",
|
|
rt305x_prom_envp);
|
|
return NULL;
|
|
}
|
|
|
|
for (p = to_ram_addr(*env); p; env++) {
|
|
printk(KERN_DEBUG "env: %s\n", *env);
|
|
if (strncmp(envname, p, len) == 0 && (p)[len] == '=')
|
|
return p + len + 1;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static __init void find_board_byname(char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(boards); i++)
|
|
if (strcmp(name, boards[i].name) == 0) {
|
|
ramips_mach = boards[i].mach_type;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
char *p;
|
|
|
|
printk(KERN_DEBUG
|
|
"prom: fw_arg0=%08x, fw_arg1=%08x, fw_arg2=%08x, fw_arg3=%08x\n",
|
|
(unsigned int)fw_arg0, (unsigned int)fw_arg1,
|
|
(unsigned int)fw_arg2, (unsigned int)fw_arg3);
|
|
|
|
rt305x_prom_argc = fw_arg0;
|
|
rt305x_prom_argv = to_ram_addr((void *)fw_arg1);
|
|
rt305x_prom_envp = to_ram_addr((void *)fw_arg2);
|
|
|
|
p = rt305x_prom_getargv("board");
|
|
if (!p)
|
|
p = rt305x_prom_getenv("board");
|
|
if (p)
|
|
find_board_byname(p);
|
|
}
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
/* We do not have to prom memory to free */
|
|
}
|