189 lines
4 KiB
C
189 lines
4 KiB
C
/*
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* Atheros AR71xx SoC specific prom routines
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*
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* Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/string.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/fw/myloader/myloader.h>
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#include <asm/mach-ar71xx/ar71xx.h>
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static inline int is_valid_ram_addr(void *addr)
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{
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if (((u32) addr > KSEG0) &&
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((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
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return 1;
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if (((u32) addr > KSEG1) &&
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((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
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return 1;
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return 0;
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}
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static void __init ar71xx_prom_append_cmdline(const char *name,
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const char *value)
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{
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char buf[COMMAND_LINE_SIZE];
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snprintf(buf, sizeof(buf), " %s=%s", name, value);
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strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
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}
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static const char * __init ar71xx_prom_find_env(char **envp, const char *name)
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{
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const char *ret = NULL;
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int len;
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char **p;
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if (!is_valid_ram_addr(envp))
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return NULL;
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len = strlen(name);
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for (p = envp; is_valid_ram_addr(*p); p++) {
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if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
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ret = *p + len + 1;
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break;
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}
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/* RedBoot env comes in pointer pairs - key, value */
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if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
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if (is_valid_ram_addr(*(++p))) {
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ret = *p;
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break;
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}
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}
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return ret;
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}
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static int __init ar71xx_prom_init_myloader(void)
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{
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struct myloader_info *mylo;
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char mac_buf[32];
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char *mac;
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mylo = myloader_get_info();
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if (!mylo)
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return 0;
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switch (mylo->did) {
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case DEVID_COMPEX_WP543:
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ar71xx_prom_append_cmdline("board", "WP543");
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break;
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default:
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printk(KERN_WARNING "prom: unknown device id: %x\n",
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mylo->did);
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return 0;
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}
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mac = mylo->macs[0];
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snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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ar71xx_prom_append_cmdline("ethaddr", mac_buf);
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return 1;
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}
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#ifdef CONFIG_IMAGE_CMDLINE_HACK
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extern char __image_cmdline[];
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static int __init ar71xx_use__image_cmdline(void)
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{
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char *p = __image_cmdline;
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int replace = 0;
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if (*p == '-') {
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replace = 1;
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p++;
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}
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if (*p == '\0')
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return 0;
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if (replace) {
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strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
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} else {
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strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
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strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
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}
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return 1;
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}
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#else
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static inline int ar71xx_use__image_cmdline(void) { return 0; }
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#endif
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static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
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{
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int i;
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if (ar71xx_use__image_cmdline())
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return;
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if (!is_valid_ram_addr(argv))
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return;
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for (i = 0; i < argc; i++)
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if (is_valid_ram_addr(argv[i])) {
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strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
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strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
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}
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}
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void __init prom_init(void)
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{
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const char *env;
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char **envp;
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printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
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"fw_arg2=%08x, fw_arg3=%08x\n",
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(unsigned int)fw_arg0, (unsigned int)fw_arg1,
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(unsigned int)fw_arg2, (unsigned int)fw_arg3);
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if (ar71xx_prom_init_myloader())
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return;
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ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
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envp = (char **)fw_arg2;
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if (!strstr(arcs_cmdline, "ethaddr=")) {
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env = ar71xx_prom_find_env(envp, "ethaddr");
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if (env)
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ar71xx_prom_append_cmdline("ethaddr", env);
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}
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if (!strstr(arcs_cmdline, "board=")) {
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env = ar71xx_prom_find_env(envp, "board");
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if (env) {
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/* Workaround for buggy bootloaders */
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if (strcmp(env, "RouterStation") == 0 ||
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strcmp(env, "Ubiquiti AR71xx-based board") == 0)
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env = "UBNT-RS";
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if (strcmp(env, "RouterStation PRO") == 0)
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env = "UBNT-RSPRO";
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ar71xx_prom_append_cmdline("board", env);
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}
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}
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}
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void __init prom_free_prom_memory(void)
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{
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/* We do not have to prom memory to free */
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}
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