diff options
Diffstat (limited to 'target/linux/ar71xx/files-2.6.39/arch/mips/ar71xx/prom.c')
| -rw-r--r-- | target/linux/ar71xx/files-2.6.39/arch/mips/ar71xx/prom.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files-2.6.39/arch/mips/ar71xx/prom.c b/target/linux/ar71xx/files-2.6.39/arch/mips/ar71xx/prom.c new file mode 100644 index 0000000000..b9b1e64fdf --- /dev/null +++ b/target/linux/ar71xx/files-2.6.39/arch/mips/ar71xx/prom.c @@ -0,0 +1,191 @@ +/* + * Atheros AR71xx SoC specific prom routines + * + * Copyright (C) 2008-2010 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 char ar71xx_cmdline_buf[COMMAND_LINE_SIZE] __initdata; +static void __init ar71xx_prom_append_cmdline(const char *name, + const char *value) +{ + snprintf(ar71xx_cmdline_buf, sizeof(ar71xx_cmdline_buf), + " %s=%s", name, value); + strlcat(arcs_cmdline, ar71xx_cmdline_buf, sizeof(arcs_cmdline)); +} + +static const char * __init ar71xx_prom_find_env(char **envp, const char *name) +{ + const char *ret = NULL; + int len; + char **p; + + if (!is_valid_ram_addr(envp)) + return NULL; + + len = strlen(name); + for (p = envp; is_valid_ram_addr(*p); p++) { + if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') { + ret = *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))) { + ret = *p; + break; + } + } + + return ret; +} + +#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 inline int ar71xx_use__image_cmdline(void) { return 0; } +#endif + +static int __init ar71xx_prom_init_myloader(void) +{ + struct myloader_info *mylo; + char mac_buf[32]; + unsigned 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); + + ar71xx_use__image_cmdline(); + + return 1; +} + +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) +{ + const char *env; + 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; + if (!strstr(arcs_cmdline, "ethaddr=")) { + env = ar71xx_prom_find_env(envp, "ethaddr"); + if (env) + ar71xx_prom_append_cmdline("ethaddr", env); + } + + if (!strstr(arcs_cmdline, "board=")) { + env = ar71xx_prom_find_env(envp, "board"); + if (env) { + /* Workaround for buggy bootloaders */ + if (strcmp(env, "RouterStation") == 0 || + strcmp(env, "Ubiquiti AR71xx-based board") == 0) + env = "UBNT-RS"; + + if (strcmp(env, "RouterStation PRO") == 0) + env = "UBNT-RSPRO"; + + ar71xx_prom_append_cmdline("board", env); + } + } +} + +void __init prom_free_prom_memory(void) +{ + /* We do not have to prom memory to free */ +} |