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/*
* Atheros AR71xx SoC specific prom routines
*
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
* Copyright (C) 2008 Imre Kaloz <kaloz@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 <linux/io.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/addrspace.h>
#include <asm/fw/myloader/myloader.h>
#include <asm/mach-ar71xx/ar71xx.h>
static inline int is_valid_ram_addr(void *addr)
{
if (((u32) addr > KSEG0) &&
((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
return 1;
if (((u32) addr > KSEG1) &&
((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
return 1;
return 0;
}
static void __init ar71xx_prom_append_cmdline(const char *name,
const char *value)
{
char buf[CL_SIZE];
snprintf(buf, sizeof(buf), " %s=%s", name, value);
strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
}
static void __init ar71xx_prom_find_env(char **envp, const char *name)
{
int len = strlen(name);
char **p;
if (!is_valid_ram_addr(envp))
return;
for (p = envp; is_valid_ram_addr(*p); p++) {
if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
ar71xx_prom_append_cmdline(name, *p + len + 1);
break;
}
/* RedBoot env comes in pointer pairs - key, value */
if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
if (is_valid_ram_addr(*(++p))) {
ar71xx_prom_append_cmdline(name, *p);
break;
}
}
}
static int __init ar71xx_prom_init_myloader(void)
{
struct myloader_info *mylo;
char mac_buf[32];
char *mac;
mylo = myloader_get_info();
if (!mylo)
return 0;
switch (mylo->did) {
case DEVID_COMPEX_WP543:
ar71xx_prom_append_cmdline("board", "WP543");
break;
default:
printk(KERN_WARNING "prom: unknown device id: %x\n",
mylo->did);
return 0;
}
mac = mylo->macs[0];
snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
ar71xx_prom_append_cmdline("ethaddr", mac_buf);
return 1;
}
#ifdef CONFIG_IMAGE_CMDLINE_HACK
extern char __image_cmdline[];
static int __init ar71xx_use__image_cmdline(void)
{
char *p = __image_cmdline;
int replace = 0;
if (*p == '-') {
replace = 1;
p++;
}
if (*p == '\0')
return 0;
if (replace) {
strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
} else {
strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
}
return 1;
}
#else
static int inline ar71xx_use__image_cmdline(void) { return 0; }
#endif
static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
{
int i;
if (ar71xx_use__image_cmdline())
return;
if (!is_valid_ram_addr(argv))
return;
for (i = 0; i < argc; i++)
if (is_valid_ram_addr(argv[i])) {
strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
}
}
void __init prom_init(void)
{
char **envp;
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);
if (ar71xx_prom_init_myloader())
return;
ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
envp = (char **)fw_arg2;
ar71xx_prom_find_env(envp, "board");
ar71xx_prom_find_env(envp, "ethaddr");
}
void __init prom_free_prom_memory(void)
{
/* We do not have to prom memory to free */
}
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