ar71xx: rewrite prom code (based on a patch by Jeff Hansen)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17566 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar71xx/config-2.6.28

@@ -98,7 +98,7 @@ CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_GPIO=y
 CONFIG_ICPLUS_PHY=y
 # CONFIG_IDE is not set
-# CONFIG_IMAGE_CMDLINE_HACK is not set
+CONFIG_IMAGE_CMDLINE_HACK=y
 CONFIG_INITRAMFS_ROOT_GID=0
 CONFIG_INITRAMFS_ROOT_UID=0
 CONFIG_INITRAMFS_SOURCE="../../root"

target/linux/ar71xx/config-2.6.30

@@ -110,7 +110,7 @@ CONFIG_I2C_ALGOBIT=y
 CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_GPIO=y
 CONFIG_ICPLUS_PHY=y
-# CONFIG_IMAGE_CMDLINE_HACK is not set
+CONFIG_IMAGE_CMDLINE_HACK=y
 CONFIG_INITRAMFS_ROOT_GID=0
 CONFIG_INITRAMFS_ROOT_UID=0
 CONFIG_INITRAMFS_SOURCE="../../root"

target/linux/ar71xx/config-2.6.31

@@ -110,7 +110,7 @@ CONFIG_I2C_ALGOBIT=y
 CONFIG_I2C_BOARDINFO=y
 CONFIG_I2C_GPIO=y
 CONFIG_ICPLUS_PHY=y
-# CONFIG_IMAGE_CMDLINE_HACK is not set
+CONFIG_IMAGE_CMDLINE_HACK=y
 CONFIG_INITRAMFS_ROOT_GID=0
 CONFIG_INITRAMFS_ROOT_UID=0
 CONFIG_INITRAMFS_SOURCE="../../root"

target/linux/ar71xx/files/arch/mips/ar71xx/prom.c

@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/io.h>
+#include <linux/string.h>
 
 #include <asm/bootinfo.h>
 #include <asm/addrspace.h>
@@ -26,10 +27,6 @@ struct board_rec {
 	enum ar71xx_mach_type	mach_type;
 };
 
-static int ar71xx_prom_argc __initdata;
-static char **ar71xx_prom_argv __initdata;
-static char **ar71xx_prom_envp __initdata;
-
 static struct board_rec boards[] __initdata = {
 	{
 		.name		= "411",
@@ -91,6 +88,9 @@ static struct board_rec boards[] __initdata = {
 	}, {
 		.name		= "WRT160NL",
 		.mach_type	= AR71XX_MACH_WRT160NL,
+	}, {
+		.name		= "WP543",
+		.mach_type	= AR71XX_MACH_WP543,
 	}, {
 		.name		= "WRT400N",
 		.mach_type	= AR71XX_MACH_WRT400N,
@@ -109,6 +109,34 @@ static struct board_rec boards[] __initdata = {
 	}
 };
 
+static int __init ar71xx_board_setup(char *name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(boards); i++)
+		if (strcmp(name, boards[i].name) == 0) {
+			ar71xx_mach = boards[i].mach_type;
+			break;
+		}
+
+	return 1;
+}
+__setup("board=", ar71xx_board_setup);
+
+static int __init ar71xx_ethaddr_setup(char *str)
+{
+	ar71xx_parse_mac_addr(str);
+	return 1;
+}
+__setup("ethaddr=", ar71xx_ethaddr_setup);
+
+static int __init ar71xx_kmac_setup(char *str)
+{
+	ar71xx_parse_mac_addr(str);
+	return 1;
+}
+__setup("kmac=", ar71xx_kmac_setup);
+
 static inline int is_valid_ram_addr(void *addr)
 {
 	if (((u32) addr > KSEG0) &&
@@ -122,62 +150,43 @@ static inline int is_valid_ram_addr(void *addr)
 	return 0;
 }
 
-static __init char *ar71xx_prom_getargv(const char *name)
+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);
-	int i;
+	char **p;
 
-	if (!is_valid_ram_addr(ar71xx_prom_argv))
-		return NULL;
+	if (!is_valid_ram_addr(envp))
+		return;
 
-	for (i = 0; i < ar71xx_prom_argc; i++) {
-		char *argv = ar71xx_prom_argv[i];
-
-		if (!is_valid_ram_addr(argv))
-			continue;
-
-		if (strncmp(name, argv, len) == 0 && (argv)[len] == '=')
-			return argv + len + 1;
-	}
-
-	return NULL;
-}
-
-static __init char *ar71xx_prom_getenv(const char *envname)
-{
-	int len = strlen(envname);
-	char **env;
-
-	if (!is_valid_ram_addr(ar71xx_prom_envp))
-		return NULL;
-
-	for (env = ar71xx_prom_envp; is_valid_ram_addr(*env); env++) {
-		if (strncmp(envname, *env, len) == 0 && (*env)[len] == '=')
-			return *env + len + 1;
+	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(envname, *env, len) == 0 && (*env)[len] == 0)
-			if (is_valid_ram_addr(*(++env)))
-				return *env;
+		if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
+			if (is_valid_ram_addr(*(++p))) {
+				ar71xx_prom_append_cmdline(name, *p);
+				break;
+			}
 	}
-
-	return NULL;
 }
 
-static __init unsigned long find_board_byname(char *name)
-{
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(boards); i++)
-		if (strcmp(name, boards[i].name) == 0)
-			return boards[i].mach_type;
-
-	return AR71XX_MACH_GENERIC;
-}
-
-static int ar71xx_prom_init_myloader(void)
+static int __init ar71xx_prom_init_myloader(void)
 {
 	struct myloader_info *mylo;
+	char mac_buf[32];
+	char *mac;
 
 	mylo = myloader_get_info();
 	if (!mylo)
@@ -185,51 +194,89 @@ static int ar71xx_prom_init_myloader(void)
 
 	switch (mylo->did) {
 	case DEVID_COMPEX_WP543:
-		ar71xx_mach = AR71XX_MACH_WP543;
+		ar71xx_prom_append_cmdline("board", "WP543");
 		break;
 	default:
 		printk(KERN_WARNING "prom: unknown device id: %x\n",
 				mylo->did);
+		return 0;
 	}
-	ar71xx_set_mac_base(mylo->macs[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;
 }
 
-static void ar71xx_prom_init_generic(void)
+#ifdef CONFIG_IMAGE_CMDLINE_HACK
+extern char __image_cmdline[];
+
+static int __init ar71xx_use__image_cmdline(void)
 {
-	char *p;
+	char *p = __image_cmdline;
+	int replace = 0;
 
-	ar71xx_prom_argc = fw_arg0;
-	ar71xx_prom_argv = (char **)fw_arg1;
-	ar71xx_prom_envp = (char **)fw_arg2;
+	if (*p == '-') {
+		replace = 1;
+		p++;
+	}
 
-	p = ar71xx_prom_getargv("board");
-	if (!p)
-		p = ar71xx_prom_getenv("board");
-	if (p)
-		ar71xx_mach = find_board_byname(p);
+	if (*p == '\0')
+		return 0;
 
-	p = ar71xx_prom_getenv("ethaddr");
-	if (!p)
-		p = ar71xx_prom_getargv("kmac");
-	if (p)
-		ar71xx_parse_mac_addr(p);
+	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);
 
+
 	ar71xx_mach = AR71XX_MACH_GENERIC;
 
 	if (ar71xx_prom_init_myloader())
 		return;
 
-	ar71xx_prom_init_generic();
+	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)