diff options
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 15 | ||||
| -rw-r--r-- | include/mtd/cfi_flash.h | 18 |
2 files changed, 20 insertions, 13 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index 22d8440..f6759a8 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -38,6 +38,7 @@ #include <asm/processor.h> #include <asm/io.h> #include <asm/byteorder.h> +#include <asm/unaligned.h> #include <environment.h> #include <mtd/cfi_flash.h> #include <watchdog.h> @@ -1640,9 +1641,10 @@ static void cfi_reverse_geometry(struct cfi_qry *qry) u32 tmp; for (i = 0, j = qry->num_erase_regions - 1; i < j; i++, j--) { - tmp = qry->erase_region_info[i]; - qry->erase_region_info[i] = qry->erase_region_info[j]; - qry->erase_region_info[j] = tmp; + tmp = get_unaligned(&(qry->erase_region_info[i])); + put_unaligned(get_unaligned(&(qry->erase_region_info[j])), + &(qry->erase_region_info[i])); + put_unaligned(tmp, &(qry->erase_region_info[j])); } } @@ -2073,8 +2075,8 @@ ulong flash_get_size (phys_addr_t base, int banknum) info->start[0] = (ulong)map_physmem(base, info->portwidth, MAP_NOCACHE); if (flash_detect_cfi (info, &qry)) { - info->vendor = le16_to_cpu(qry.p_id); - info->ext_addr = le16_to_cpu(qry.p_adr); + info->vendor = le16_to_cpu(get_unaligned(&(qry.p_id))); + info->ext_addr = le16_to_cpu(get_unaligned(&(qry.p_adr))); num_erase_regions = qry.num_erase_regions; if (info->ext_addr) { @@ -2163,7 +2165,8 @@ ulong flash_get_size (phys_addr_t base, int banknum) break; } - tmp = le32_to_cpu(qry.erase_region_info[i]); + tmp = le32_to_cpu(get_unaligned( + &(qry.erase_region_info[i]))); debug("erase region %u: 0x%08lx\n", i, tmp); erase_region_count = (tmp & 0xffff) + 1; 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 { |