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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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