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authorGabor Juhos <juhosg@openwrt.org>2013-12-16 10:11:01 +0000
committerGabor Juhos <juhosg@openwrt.org>2013-12-16 10:11:01 +0000
commit16565ec94b39abceca14cb844fb1ff6cab2f815d (patch)
treea540ed1491393cbd8399457ebce21508cab02dd5 /target/linux/ar71xx/files/arch
parent0601b5f404925808765b0dde196d633c3326ce84 (diff)
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ar71xx: add some RouterBOOT specific helper functions
Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 39091
Diffstat (limited to 'target/linux/ar71xx/files/arch')
-rw-r--r--target/linux/ar71xx/files/arch/mips/ath79/routerboot.c129
-rw-r--r--target/linux/ar71xx/files/arch/mips/ath79/routerboot.h24
2 files changed, 153 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
index 1cb1f9d4eb..dbdec02056 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.c
@@ -8,12 +8,21 @@
* by the Free Software Foundation.
*/
+#define pr_fmt(fmt) "rb: " fmt
+
#include <linux/kernel.h>
+#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/routerboot.h>
+#include <linux/rle.h>
#include "routerboot.h"
+#define RB_BLOCK_SIZE 0x1000
+#define RB_ART_SIZE 0x10000
+
+static struct rb_info rb_info;
+
static u32 get_u32(void *buf)
{
u8 *p = buf;
@@ -118,3 +127,123 @@ routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
return ret;
}
+
+static inline int
+rb_find_hard_cfg_tag(u16 tag_id, u8 **tag_data, u16 *tag_len)
+{
+ if (!rb_info.hard_cfg_data ||
+ !rb_info.hard_cfg_size)
+ return -ENOENT;
+
+ return routerboot_find_tag(rb_info.hard_cfg_data,
+ rb_info.hard_cfg_size,
+ tag_id, tag_data, tag_len);
+}
+
+__init const char *
+rb_get_board_name(void)
+{
+ u16 tag_len;
+ u8 *tag;
+ int err;
+
+ err = rb_find_hard_cfg_tag(RB_ID_BOARD_NAME, &tag, &tag_len);
+ if (err)
+ return NULL;
+
+ return tag;
+}
+
+__init u32
+rb_get_hw_options(void)
+{
+ u16 tag_len;
+ u8 *tag;
+ int err;
+
+ err = rb_find_hard_cfg_tag(RB_ID_HW_OPTIONS, &tag, &tag_len);
+ if (err)
+ return 0;
+
+ return get_u32(tag);
+}
+
+__init void *
+rb_get_wlan_data(void)
+{
+ u16 tag_len;
+ u8 *tag;
+ void *buf;
+ int err;
+
+ err = rb_find_hard_cfg_tag(RB_ID_WLAN_DATA, &tag, &tag_len);
+ if (err) {
+ pr_err("no calibration data found\n");
+ goto err;
+ }
+
+ buf = kmalloc(RB_ART_SIZE, GFP_KERNEL);
+ if (buf == NULL) {
+ pr_err("no memory for calibration data\n");
+ goto err;
+ }
+
+ err = rle_decode((char *) tag, tag_len, buf, RB_ART_SIZE,
+ NULL, NULL);
+ if (err) {
+ pr_err("unable to decode calibration data\n");
+ goto err_free;
+ }
+
+ return buf;
+
+err_free:
+ kfree(buf);
+err:
+ return NULL;
+}
+
+__init const struct rb_info *
+rb_init_info(void *data, unsigned int size)
+{
+ unsigned int offset;
+
+ if (size == 0 || (size % RB_BLOCK_SIZE) != 0)
+ return NULL;
+
+ for (offset = 0; offset < size; offset += RB_BLOCK_SIZE) {
+ u32 magic;
+
+ magic = get_u32(data + offset);
+ switch (magic) {
+ case RB_MAGIC_HARD:
+ rb_info.hard_cfg_offs = offset;
+ break;
+
+ case RB_MAGIC_SOFT:
+ rb_info.soft_cfg_offs = offset;
+ break;
+ }
+ }
+
+ if (!rb_info.hard_cfg_offs) {
+ pr_err("could not find a valid RouterBOOT hard config\n");
+ return NULL;
+ }
+
+ if (!rb_info.soft_cfg_offs) {
+ pr_err("could not find a valid RouterBOOT soft config\n");
+ return NULL;
+ }
+
+ rb_info.hard_cfg_size = RB_BLOCK_SIZE;
+ rb_info.hard_cfg_data = kmemdup(data + rb_info.hard_cfg_offs,
+ RB_BLOCK_SIZE, GFP_KERNEL);
+ if (!rb_info.hard_cfg_data)
+ return NULL;
+
+ rb_info.board_name = rb_get_board_name();
+ rb_info.hw_options = rb_get_hw_options();
+
+ return &rb_info;
+}
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
index 2489e0aee0..6ec296afd4 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/routerboot.h
@@ -11,11 +11,35 @@
#ifndef _ATH79_ROUTERBOOT_H_
#define _ATH79_ROUTERBOOT_H_
+struct rb_info {
+ unsigned int hard_cfg_offs;
+ unsigned int hard_cfg_size;
+ void *hard_cfg_data;
+ unsigned int soft_cfg_offs;
+
+ const char *board_name;
+ u32 hw_options;
+};
+
#ifdef CONFIG_ATH79_ROUTERBOOT
+const struct rb_info *rb_init_info(void *data, unsigned int size);
+void *rb_get_wlan_data(void);
+
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 const struct rb_info *
+rb_init_info(void *data, unsigned int size)
+{
+ return NULL;
+}
+
+static inline void *rb_get_wlan_data(void)
+{
+ return NULL;
+}
+
static inline int
routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
u8 **tag_data, u16 *tag_len)