diff options
Diffstat (limited to 'include/mtd/cfi_flash.h')
| -rw-r--r-- | include/mtd/cfi_flash.h | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/include/mtd/cfi_flash.h b/include/mtd/cfi_flash.h index 966b5e0..b644b91 100644 --- a/include/mtd/cfi_flash.h +++ b/include/mtd/cfi_flash.h @@ -129,12 +129,16 @@ typedef union { } cfiword_t; /* CFI standard query structure */ +/* The offsets and sizes of this packed structure members correspond + * to the actual layout in CFI Flash chips. Some 16- and 32-bit members + * are unaligned and must be accessed with explicit unaligned access macros. + */ struct cfi_qry { u8 qry[3]; - u16 p_id; - u16 p_adr; - u16 a_id; - u16 a_adr; + u16 p_id; /* unaligned */ + u16 p_adr; /* unaligned */ + u16 a_id; /* unaligned */ + u16 a_adr; /* unaligned */ u8 vcc_min; u8 vcc_max; u8 vpp_min; @@ -148,10 +152,10 @@ struct cfi_qry { u8 block_erase_timeout_max; u8 chip_erase_timeout_max; u8 dev_size; - u16 interface_desc; - u16 max_buf_write_size; + u16 interface_desc; /* aligned */ + u16 max_buf_write_size; /* aligned */ u8 num_erase_regions; - u32 erase_region_info[NUM_ERASE_REGIONS]; + u32 erase_region_info[NUM_ERASE_REGIONS]; /* unaligned */ } __attribute__((packed)); struct cfi_pri_hdr { |