2 /* Common Flash Interface structures
3 * See http://support.intel.com/design/flash/technote/index.htm
4 * $Id: cfi.h,v 1.56 2005/11/07 11:14:54 gleixner Exp $
10 #include <linux/config.h>
11 #include <linux/version.h>
12 #include <linux/delay.h>
13 #include <linux/types.h>
14 #include <linux/interrupt.h>
15 #include <linux/mtd/flashchip.h>
16 #include <linux/mtd/map.h>
17 #include <linux/mtd/cfi_endian.h>
19 #ifdef CONFIG_MTD_CFI_I1
20 #define cfi_interleave(cfi) 1
21 #define cfi_interleave_is_1(cfi) (cfi_interleave(cfi) == 1)
23 #define cfi_interleave_is_1(cfi) (0)
26 #ifdef CONFIG_MTD_CFI_I2
27 # ifdef cfi_interleave
28 # undef cfi_interleave
29 # define cfi_interleave(cfi) ((cfi)->interleave)
31 # define cfi_interleave(cfi) 2
33 #define cfi_interleave_is_2(cfi) (cfi_interleave(cfi) == 2)
35 #define cfi_interleave_is_2(cfi) (0)
38 #ifdef CONFIG_MTD_CFI_I4
39 # ifdef cfi_interleave
40 # undef cfi_interleave
41 # define cfi_interleave(cfi) ((cfi)->interleave)
43 # define cfi_interleave(cfi) 4
45 #define cfi_interleave_is_4(cfi) (cfi_interleave(cfi) == 4)
47 #define cfi_interleave_is_4(cfi) (0)
50 #ifdef CONFIG_MTD_CFI_I8
51 # ifdef cfi_interleave
52 # undef cfi_interleave
53 # define cfi_interleave(cfi) ((cfi)->interleave)
55 # define cfi_interleave(cfi) 8
57 #define cfi_interleave_is_8(cfi) (cfi_interleave(cfi) == 8)
59 #define cfi_interleave_is_8(cfi) (0)
62 static inline int cfi_interleave_supported(int i
)
65 #ifdef CONFIG_MTD_CFI_I1
68 #ifdef CONFIG_MTD_CFI_I2
71 #ifdef CONFIG_MTD_CFI_I4
74 #ifdef CONFIG_MTD_CFI_I8
85 /* NB: these values must represents the number of bytes needed to meet the
86 * device type (x8, x16, x32). Eg. a 32 bit device is 4 x 8 bytes.
87 * These numbers are used in calculations.
89 #define CFI_DEVICETYPE_X8 (8 / 8)
90 #define CFI_DEVICETYPE_X16 (16 / 8)
91 #define CFI_DEVICETYPE_X32 (32 / 8)
92 #define CFI_DEVICETYPE_X64 (64 / 8)
94 /* NB: We keep these structures in memory in HOST byteorder, except
95 * where individually noted.
98 /* Basic Query Structure */
109 uint8_t WordWriteTimeoutTyp
;
110 uint8_t BufWriteTimeoutTyp
;
111 uint8_t BlockEraseTimeoutTyp
;
112 uint8_t ChipEraseTimeoutTyp
;
113 uint8_t WordWriteTimeoutMax
;
114 uint8_t BufWriteTimeoutMax
;
115 uint8_t BlockEraseTimeoutMax
;
116 uint8_t ChipEraseTimeoutMax
;
118 uint16_t InterfaceDesc
;
119 uint16_t MaxBufWriteSize
;
120 uint8_t NumEraseRegions
;
121 uint32_t EraseRegionInfo
[0]; /* Not host ordered */
122 } __attribute__((packed
));
124 /* Extended Query Structure for both PRI and ALT */
126 struct cfi_extquery
{
128 uint8_t MajorVersion
;
129 uint8_t MinorVersion
;
130 } __attribute__((packed
));
132 /* Vendor-Specific PRI for Intel/Sharp Extended Command Set (0x0001) */
134 struct cfi_pri_intelext
{
136 uint8_t MajorVersion
;
137 uint8_t MinorVersion
;
138 uint32_t FeatureSupport
; /* if bit 31 is set then an additional uint32_t feature
139 block follows - FIXME - not currently supported */
140 uint8_t SuspendCmdSupport
;
141 uint16_t BlkStatusRegMask
;
144 uint8_t NumProtectionFields
;
145 uint16_t ProtRegAddr
;
146 uint8_t FactProtRegSize
;
147 uint8_t UserProtRegSize
;
149 } __attribute__((packed
));
151 struct cfi_intelext_otpinfo
{
152 uint32_t ProtRegAddr
;
154 uint8_t FactProtRegSize
;
156 uint8_t UserProtRegSize
;
157 } __attribute__((packed
));
159 struct cfi_intelext_blockinfo
{
160 uint16_t NumIdentBlocks
;
162 uint16_t MinBlockEraseCycles
;
165 } __attribute__((packed
));
167 struct cfi_intelext_regioninfo
{
168 uint16_t NumIdentPartitions
;
169 uint8_t NumOpAllowed
;
170 uint8_t NumOpAllowedSimProgMode
;
171 uint8_t NumOpAllowedSimEraMode
;
172 uint8_t NumBlockTypes
;
173 struct cfi_intelext_blockinfo BlockTypes
[1];
174 } __attribute__((packed
));
176 struct cfi_intelext_programming_regioninfo
{
177 uint8_t ProgRegShift
;
179 uint8_t ControlValid
;
181 uint8_t ControlInvalid
;
183 } __attribute__((packed
));
185 /* Vendor-Specific PRI for AMD/Fujitsu Extended Command Set (0x0002) */
187 struct cfi_pri_amdstd
{
189 uint8_t MajorVersion
;
190 uint8_t MinorVersion
;
191 uint8_t SiliconRevision
; /* bits 1-0: Address Sensitive Unlock */
192 uint8_t EraseSuspend
;
194 uint8_t TmpBlkUnprotect
;
195 uint8_t BlkProtUnprot
;
196 uint8_t SimultaneousOps
;
202 } __attribute__((packed
));
204 struct cfi_pri_query
{
206 uint32_t ProtField
[1]; /* Not host ordered */
207 } __attribute__((packed
));
209 struct cfi_bri_query
{
210 uint8_t PageModeReadCap
;
212 uint32_t ConfField
[1]; /* Not host ordered */
213 } __attribute__((packed
));
215 #define P_ID_NONE 0x0000
216 #define P_ID_INTEL_EXT 0x0001
217 #define P_ID_AMD_STD 0x0002
218 #define P_ID_INTEL_STD 0x0003
219 #define P_ID_AMD_EXT 0x0004
220 #define P_ID_WINBOND 0x0006
221 #define P_ID_ST_ADV 0x0020
222 #define P_ID_MITSUBISHI_STD 0x0100
223 #define P_ID_MITSUBISHI_EXT 0x0101
224 #define P_ID_SST_PAGE 0x0102
225 #define P_ID_INTEL_PERFORMANCE 0x0200
226 #define P_ID_INTEL_DATA 0x0210
227 #define P_ID_RESERVED 0xffff
230 #define CFI_MODE_CFI 1
231 #define CFI_MODE_JEDEC 0
238 int cfi_mode
; /* Are we a JEDEC device pretending to be CFI? */
241 struct mtd_info
*(*cmdset_setup
)(struct map_info
*);
242 struct cfi_ident
*cfiq
; /* For now only one. We insist that all devs
243 must be of the same type. */
246 unsigned long chipshift
; /* Because they're of the same type */
247 const char *im_name
; /* inter_module name for cmdset_setup */
248 struct flchip chips
[0]; /* per-chip data structure for each chip */
252 * Returns the command address according to the given geometry.
254 static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs
, int interleave
, int type
)
256 return (cmd_ofs
* type
) * interleave
;
260 * Transforms the CFI command for the given geometry (bus width & interleave).
261 * It looks too long to be inline, but in the common case it should almost all
262 * get optimised away.
264 static inline map_word
cfi_build_cmd(u_long cmd
, struct map_info
*map
, struct cfi_private
*cfi
)
266 map_word val
= { {0} };
267 int wordwidth
, words_per_bus
, chip_mode
, chips_per_word
;
268 unsigned long onecmd
;
271 /* We do it this way to give the compiler a fighting chance
272 of optimising away all the crap for 'bankwidth' larger than
273 an unsigned long, in the common case where that support is
275 if (map_bankwidth_is_large(map
)) {
276 wordwidth
= sizeof(unsigned long);
277 words_per_bus
= (map_bankwidth(map
)) / wordwidth
; // i.e. normally 1
279 wordwidth
= map_bankwidth(map
);
283 chip_mode
= map_bankwidth(map
) / cfi_interleave(cfi
);
284 chips_per_word
= wordwidth
* cfi_interleave(cfi
) / map_bankwidth(map
);
286 /* First, determine what the bit-pattern should be for a single
287 device, according to chip mode and endianness... */
294 onecmd
= cpu_to_cfi16(cmd
);
297 onecmd
= cpu_to_cfi32(cmd
);
301 /* Now replicate it across the size of an unsigned long, or
302 just to the bus width as appropriate */
303 switch (chips_per_word
) {
305 #if BITS_PER_LONG >= 64
307 onecmd
|= (onecmd
<< (chip_mode
* 32));
310 onecmd
|= (onecmd
<< (chip_mode
* 16));
312 onecmd
|= (onecmd
<< (chip_mode
* 8));
317 /* And finally, for the multi-word case, replicate it
318 in all words in the structure */
319 for (i
=0; i
< words_per_bus
; i
++) {
325 #define CMD(x) cfi_build_cmd((x), map, cfi)
328 static inline unsigned long cfi_merge_status(map_word val
, struct map_info
*map
,
329 struct cfi_private
*cfi
)
331 int wordwidth
, words_per_bus
, chip_mode
, chips_per_word
;
332 unsigned long onestat
, res
= 0;
335 /* We do it this way to give the compiler a fighting chance
336 of optimising away all the crap for 'bankwidth' larger than
337 an unsigned long, in the common case where that support is
339 if (map_bankwidth_is_large(map
)) {
340 wordwidth
= sizeof(unsigned long);
341 words_per_bus
= (map_bankwidth(map
)) / wordwidth
; // i.e. normally 1
343 wordwidth
= map_bankwidth(map
);
347 chip_mode
= map_bankwidth(map
) / cfi_interleave(cfi
);
348 chips_per_word
= wordwidth
* cfi_interleave(cfi
) / map_bankwidth(map
);
351 /* Or all status words together */
352 for (i
=1; i
< words_per_bus
; i
++) {
357 switch(chips_per_word
) {
359 #if BITS_PER_LONG >= 64
361 res
|= (onestat
>> (chip_mode
* 32));
364 res
|= (onestat
>> (chip_mode
* 16));
366 res
|= (onestat
>> (chip_mode
* 8));
371 /* Last, determine what the bit-pattern should be for a single
372 device, according to chip mode and endianness... */
377 res
= cfi16_to_cpu(res
);
380 res
= cfi32_to_cpu(res
);
387 #define MERGESTATUS(x) cfi_merge_status((x), map, cfi)
391 * Sends a CFI command to a bank of flash for the given geometry.
393 * Returns the offset in flash where the command was written.
394 * If prev_val is non-null, it will be set to the value at the command address,
395 * before the command was written.
397 static inline uint32_t cfi_send_gen_cmd(u_char cmd
, uint32_t cmd_addr
, uint32_t base
,
398 struct map_info
*map
, struct cfi_private
*cfi
,
399 int type
, map_word
*prev_val
)
402 uint32_t addr
= base
+ cfi_build_cmd_addr(cmd_addr
, cfi_interleave(cfi
), type
);
404 val
= cfi_build_cmd(cmd
, map
, cfi
);
407 *prev_val
= map_read(map
, addr
);
409 map_write(map
, val
, addr
);
414 static inline uint8_t cfi_read_query(struct map_info
*map
, uint32_t addr
)
416 map_word val
= map_read(map
, addr
);
418 if (map_bankwidth_is_1(map
)) {
420 } else if (map_bankwidth_is_2(map
)) {
421 return cfi16_to_cpu(val
.x
[0]);
423 /* No point in a 64-bit byteswap since that would just be
424 swapping the responses from different chips, and we are
425 only interested in one chip (a representative sample) */
426 return cfi32_to_cpu(val
.x
[0]);
430 static inline void cfi_udelay(int us
)
433 msleep((us
+999)/1000);
440 struct cfi_extquery
*cfi_read_pri(struct map_info
*map
, uint16_t adr
, uint16_t size
,
445 void (*fixup
)(struct mtd_info
*mtd
, void* param
);
449 #define CFI_MFR_ANY 0xffff
450 #define CFI_ID_ANY 0xffff
452 #define CFI_MFR_AMD 0x0001
453 #define CFI_MFR_ST 0x0020 /* STMicroelectronics */
455 void cfi_fixup(struct mtd_info
*mtd
, struct cfi_fixup
* fixups
);
457 typedef int (*varsize_frob_t
)(struct map_info
*map
, struct flchip
*chip
,
458 unsigned long adr
, int len
, void *thunk
);
460 int cfi_varsize_frob(struct mtd_info
*mtd
, varsize_frob_t frob
,
461 loff_t ofs
, size_t len
, void *thunk
);
464 #endif /* __MTD_CFI_H__ */