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@ -8,12 +8,21 @@
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* by the Free Software Foundation.
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*/
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#define pr_fmt(fmt) "rb: " fmt
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/routerboot.h>
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#include <linux/rle.h>
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#include "routerboot.h"
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#define RB_BLOCK_SIZE 0x1000
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#define RB_ART_SIZE 0x10000
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static struct rb_info rb_info;
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static u32 get_u32(void *buf)
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{
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u8 *p = buf;
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@ -118,3 +127,123 @@ routerboot_find_tag(u8 *buf, unsigned int buflen, u16 tag_id,
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return ret;
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}
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static inline int
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rb_find_hard_cfg_tag(u16 tag_id, u8 **tag_data, u16 *tag_len)
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{
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if (!rb_info.hard_cfg_data ||
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!rb_info.hard_cfg_size)
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return -ENOENT;
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return routerboot_find_tag(rb_info.hard_cfg_data,
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rb_info.hard_cfg_size,
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tag_id, tag_data, tag_len);
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}
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__init const char *
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rb_get_board_name(void)
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{
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u16 tag_len;
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u8 *tag;
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int err;
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err = rb_find_hard_cfg_tag(RB_ID_BOARD_NAME, &tag, &tag_len);
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if (err)
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return NULL;
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return tag;
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}
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__init u32
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rb_get_hw_options(void)
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{
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u16 tag_len;
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u8 *tag;
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int err;
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err = rb_find_hard_cfg_tag(RB_ID_HW_OPTIONS, &tag, &tag_len);
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if (err)
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return 0;
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return get_u32(tag);
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}
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__init void *
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rb_get_wlan_data(void)
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{
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u16 tag_len;
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u8 *tag;
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void *buf;
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int err;
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err = rb_find_hard_cfg_tag(RB_ID_WLAN_DATA, &tag, &tag_len);
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if (err) {
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pr_err("no calibration data found\n");
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goto err;
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}
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buf = kmalloc(RB_ART_SIZE, GFP_KERNEL);
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if (buf == NULL) {
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pr_err("no memory for calibration data\n");
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goto err;
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}
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err = rle_decode((char *) tag, tag_len, buf, RB_ART_SIZE,
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NULL, NULL);
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if (err) {
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pr_err("unable to decode calibration data\n");
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goto err_free;
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}
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return buf;
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err_free:
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kfree(buf);
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err:
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return NULL;
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}
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__init const struct rb_info *
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rb_init_info(void *data, unsigned int size)
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{
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unsigned int offset;
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if (size == 0 || (size % RB_BLOCK_SIZE) != 0)
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return NULL;
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for (offset = 0; offset < size; offset += RB_BLOCK_SIZE) {
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u32 magic;
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magic = get_u32(data + offset);
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switch (magic) {
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case RB_MAGIC_HARD:
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rb_info.hard_cfg_offs = offset;
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break;
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case RB_MAGIC_SOFT:
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rb_info.soft_cfg_offs = offset;
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break;
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}
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}
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if (!rb_info.hard_cfg_offs) {
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pr_err("could not find a valid RouterBOOT hard config\n");
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return NULL;
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}
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if (!rb_info.soft_cfg_offs) {
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pr_err("could not find a valid RouterBOOT soft config\n");
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return NULL;
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}
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rb_info.hard_cfg_size = RB_BLOCK_SIZE;
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rb_info.hard_cfg_data = kmemdup(data + rb_info.hard_cfg_offs,
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RB_BLOCK_SIZE, GFP_KERNEL);
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if (!rb_info.hard_cfg_data)
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return NULL;
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rb_info.board_name = rb_get_board_name();
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rb_info.hw_options = rb_get_hw_options();
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return &rb_info;
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}
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