ar71xx: add hard_cfg offset detection for rb2011 support - fixes wlan on some newer devices

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36631 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 51 insertions, 7 deletions

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
index 60baae9b7..46b8a053d 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rb2011.c
@@ -39,11 +39,10 @@
 #define RB2011_GPIO_NAND_NCE	14
 
 #define RB_ROUTERBOOT_OFFSET	0x0000
-#define RB_ROUTERBOOT_SIZE	0xb000
-#define RB_HARD_CFG_OFFSET	0xb000
+#define RB_ROUTERBOOT_MIN_SIZE	0xb000
 #define RB_HARD_CFG_SIZE	0x1000
 #define RB_BIOS_OFFSET		0xd000
-#define RB_BIOS_SIZE		0x2000
+#define RB_BIOS_SIZE		0x1000
 #define RB_SOFT_CFG_OFFSET	0xf000
 #define RB_SOFT_CFG_SIZE	0x1000
 
@@ -53,11 +52,9 @@ static struct mtd_partition rb2011_spi_partitions[] = {
 	{
 		.name		= "routerboot",
 		.offset		= RB_ROUTERBOOT_OFFSET,
-		.size		= RB_ROUTERBOOT_SIZE,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "hard_config",
-		.offset		= RB_HARD_CFG_OFFSET,
 		.size		= RB_HARD_CFG_SIZE,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
@@ -67,11 +64,29 @@ static struct mtd_partition rb2011_spi_partitions[] = {
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "soft_config",
-		.offset		= RB_SOFT_CFG_OFFSET,
 		.size		= RB_SOFT_CFG_SIZE,
 	}
 };
 
+
+static void __init rb2011_init_partitions(void)
+{
+	u8 *addr = (u8 *) KSEG1ADDR(0x1f000000);
+	u32 next = RB_ROUTERBOOT_MIN_SIZE;
+
+	if (routerboot_find_magic(addr, 0x10000, &next, true))
+		printk(KERN_ERR "Warning: could not find a valid RouterBOOT hard config\n");
+	rb2011_spi_partitions[0].size = next;
+	rb2011_spi_partitions[1].offset = next;
+
+	next = RB_BIOS_OFFSET + RB_BIOS_SIZE;
+	if (routerboot_find_magic(addr, 0x10000, &next, false))
+		printk(KERN_ERR "Warning: could not find a valid RouterBOOT soft config\n");
+
+	rb2011_spi_partitions[3].offset = next;
+}
+
+
 static struct mtd_partition rb2011_nand_partitions[] = {
 	{
 		.name	= "booter",
@@ -125,13 +140,14 @@ static struct mdio_board_info rb2011_mdio0_info[] = {
 
 static void __init rb2011_wlan_init(void)
 {
-	u8 *hard_cfg = (u8 *) KSEG1ADDR(0x1f000000 + RB_HARD_CFG_OFFSET);
+	u8 *hard_cfg = (u8 *) KSEG1ADDR(0x1f000000);
 	u16 tag_len;
 	u8 *tag;
 	char *art_buf;
 	u8 wlan_mac[ETH_ALEN];
 	int err;
 
+	hard_cfg += rb2011_spi_partitions[1].offset;
 	err = routerboot_find_tag(hard_cfg, RB_HARD_CFG_SIZE, RB_ID_WLAN_DATA,
 				  &tag, &tag_len);
 	if (err) {
@@ -211,6 +227,7 @@ static void __init rb2011_gpio_init(void)
 
 static void __init rb2011_setup(void)
 {
+	rb2011_init_partitions();
 	rb2011_gpio_init();
 
 	ath79_register_m25p80(&rb2011_spi_flash_data);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
index 3c6f9aaeb..1cb1f9d4e 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
@@ -30,6 +30,26 @@ static u16 get_u16(void *buf)
 }
 
 __init int
+routerboot_find_magic(u8 *buf, unsigned int buflen, u32 *offset, bool hard)
+{
+	u32 magic_ref = hard ? RB_MAGIC_HARD : RB_MAGIC_SOFT;
+	u32 magic;
+	u32 cur = *offset;
+
+	while (cur < buflen) {
+		magic = get_u32(buf + cur);
+		if (magic == magic_ref) {
+			*offset = cur;
+			return 0;
+		}
+
+		cur += 0x1000;
+	}
+
+	return -ENOENT;
+}
+
+__init int
 routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
 		    u8 **tag_data, u16 *tag_len)
 {
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
index 9a4dde59e..2489e0aee 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
@@ -14,6 +14,7 @@
 #ifdef CONFIG_ATH79_ROUTERBOOT
 int routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
 			u8 **tag_data, u16 *tag_len);
+int routerboot_find_magic(u8 *buf, unsigned int buflen, u32 *offset, bool hard);
 #else
 static inline int
 routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
@@ -21,6 +22,12 @@ routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
 {
 	return -ENOENT;
 }
+
+static inline int
+routerboot_find_magic(u8 *buf, unsigned int buflen, u32 *offset, bool hard)
+{
+	return -ENOENT;
+}
 #endif
 
 #endif /* _ATH79_ROUTERBOOT_H_ */