diff options
Diffstat (limited to 'include/linux/mtd/cfi.h')
| -rw-r--r-- | include/linux/mtd/cfi.h | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h index d6fb115f5a0..00e2b575021 100644 --- a/include/linux/mtd/cfi.h +++ b/include/linux/mtd/cfi.h @@ -12,6 +12,7 @@ #include <linux/mtd/flashchip.h> #include <linux/mtd/map.h> #include <linux/mtd/cfi_endian.h> +#include <linux/mtd/xip.h> #ifdef CONFIG_MTD_CFI_I1 #define cfi_interleave(cfi) 1 @@ -281,9 +282,25 @@ struct cfi_private { /* * Returns the command address according to the given geometry. */ -static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs, int interleave, int type) +static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs, + struct map_info *map, struct cfi_private *cfi) { - return (cmd_ofs * type) * interleave; + unsigned bankwidth = map_bankwidth(map); + unsigned interleave = cfi_interleave(cfi); + unsigned type = cfi->device_type; + uint32_t addr; + + addr = (cmd_ofs * type) * interleave; + + /* Modify the unlock address if we are in compatiblity mode. + * For 16bit devices on 8 bit busses + * and 32bit devices on 16 bit busses + * set the low bit of the alternating bit sequence of the address. + */ + if (((type * interleave) > bankwidth) && ((uint8_t)cmd_ofs == 0xaa)) + addr |= (type >> 1)*interleave; + + return addr; } /* @@ -429,8 +446,7 @@ static inline uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t int type, map_word *prev_val) { map_word val; - uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, cfi_interleave(cfi), type); - + uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi); val = cfi_build_cmd(cmd, map, cfi); if (prev_val) @@ -483,6 +499,13 @@ static inline void cfi_udelay(int us) } } +int __xipram cfi_qry_present(struct map_info *map, __u32 base, + struct cfi_private *cfi); +int __xipram cfi_qry_mode_on(uint32_t base, struct map_info *map, + struct cfi_private *cfi); +void __xipram cfi_qry_mode_off(uint32_t base, struct map_info *map, + struct cfi_private *cfi); + struct cfi_extquery *cfi_read_pri(struct map_info *map, uint16_t adr, uint16_t size, const char* name); struct cfi_fixup { |