2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
15 #include <linux/string.h>
17 #include <asm/bootinfo.h>
18 #include <asm/addrspace.h>
19 #include <asm/fw/myloader/myloader.h>
21 #include <asm/mach-ar71xx/ar71xx.h>
23 static inline int is_valid_ram_addr(void *addr)
25 if (((u32) addr > KSEG0) &&
26 ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
29 if (((u32) addr > KSEG1) &&
30 ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
36 static void __init ar71xx_prom_append_cmdline(const char *name,
39 char buf[COMMAND_LINE_SIZE];
41 snprintf(buf, sizeof(buf), " %s=%s", name, value);
42 strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
45 static const char * __init ar71xx_prom_find_env(char **envp, const char *name)
47 const char *ret = NULL;
51 if (!is_valid_ram_addr(envp))
55 for (p = envp; is_valid_ram_addr(*p); p++) {
56 if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
61 /* RedBoot env comes in pointer pairs - key, value */
62 if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
63 if (is_valid_ram_addr(*(++p))) {
72 static int __init ar71xx_prom_init_myloader(void)
74 struct myloader_info *mylo;
78 mylo = myloader_get_info();
83 case DEVID_COMPEX_WP543:
84 ar71xx_prom_append_cmdline("board", "WP543");
87 printk(KERN_WARNING "prom: unknown device id: %x\n",
93 snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
94 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
96 ar71xx_prom_append_cmdline("ethaddr", mac_buf);
101 #ifdef CONFIG_IMAGE_CMDLINE_HACK
102 extern char __image_cmdline[];
104 static int __init ar71xx_use__image_cmdline(void)
106 char *p = __image_cmdline;
118 strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
120 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
121 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
127 static inline int ar71xx_use__image_cmdline(void) { return 0; }
130 static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
134 if (ar71xx_use__image_cmdline())
137 if (!is_valid_ram_addr(argv))
140 for (i = 0; i < argc; i++)
141 if (is_valid_ram_addr(argv[i])) {
142 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
143 strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
147 void __init prom_init(void)
152 printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
153 "fw_arg2=%08x, fw_arg3=%08x\n",
154 (unsigned int)fw_arg0, (unsigned int)fw_arg1,
155 (unsigned int)fw_arg2, (unsigned int)fw_arg3);
158 if (ar71xx_prom_init_myloader())
161 ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
163 envp = (char **)fw_arg2;
164 if (!strstr(arcs_cmdline, "ethaddr=")) {
165 env = ar71xx_prom_find_env(envp, "ethaddr");
167 ar71xx_prom_append_cmdline("ethaddr", env);
170 if (!strstr(arcs_cmdline, "board=")) {
171 env = ar71xx_prom_find_env(envp, "board");
173 /* Workaround for buggy bootloaders */
174 if (strcmp(env, "RouterStation") == 0 ||
175 strcmp(env, "Ubiquiti AR71xx-based board") == 0)
178 if (strcmp(env, "RouterStation PRO") == 0)
181 ar71xx_prom_append_cmdline("board", env);
186 void __init prom_free_prom_memory(void)
188 /* We do not have to prom memory to free */