ar71xx: add linux 3.14 support

Signed-off-by: Zhao, Gang <gang.zhao.42@gmail.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 42038

1 files changed, 86 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.14/506-MIPS-ath79-prom-parse-redboot-args.patch b/target/linux/ar71xx/patches-3.14/506-MIPS-ath79-prom-parse-redboot-args.patch
new file mode 100644
index 0000000000..aab959b900
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.14/506-MIPS-ath79-prom-parse-redboot-args.patch
@@ -0,0 +1,86 @@
+--- a/arch/mips/ath79/prom.c
++++ b/arch/mips/ath79/prom.c
+@@ -19,6 +19,8 @@
+ 
+ #include "common.h"
+ 
++static char ath79_cmdline_buf[COMMAND_LINE_SIZE] __initdata;
++
+ static inline int is_valid_ram_addr(void *addr)
+ {
+ 	if (((u32) addr > KSEG0) &&
+@@ -32,6 +34,41 @@ static inline int is_valid_ram_addr(void
+ 	return 0;
+ }
+ 
++static void __init ath79_prom_append_cmdline(const char *name,
++					      const char *value)
++{
++	snprintf(ath79_cmdline_buf, sizeof(ath79_cmdline_buf),
++		 " %s=%s", name, value);
++	strlcat(arcs_cmdline, ath79_cmdline_buf, sizeof(arcs_cmdline));
++}
++
++static const char * __init ath79_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;
++}
++
+ static __init void ath79_prom_init_cmdline(int argc, char **argv)
+ {
+ 	int i;
+@@ -48,7 +85,32 @@ static __init void ath79_prom_init_cmdli
+ 
+ void __init prom_init(void)
+ {
++	const char *env;
++	char **envp;
++
+ 	ath79_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
++
++	envp = (char **)fw_arg2;
++	if (!strstr(arcs_cmdline, "ethaddr=")) {
++		env = ath79_prom_find_env(envp, "ethaddr");
++		if (env)
++			ath79_prom_append_cmdline("ethaddr", env);
++	}
++
++	if (!strstr(arcs_cmdline, "board=")) {
++		env = ath79_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";
++
++			ath79_prom_append_cmdline("board", env);
++		}
++	}
+ }
+ 
+ void __init prom_free_prom_memory(void)