2 /* Common Flash Interface structures
3 * See http://support.intel.com/design/flash/technote/index.htm
4 * $Id: cfi.h,v 1.57 2005/11/15 23:28:17 tpoynor Exp $
10 #include <linux/delay.h>
11 #include <linux/types.h>
12 #include <linux/interrupt.h>
13 #include <linux/mtd/flashchip.h>
14 #include <linux/mtd/map.h>
15 #include <linux/mtd/cfi_endian.h>
17 #ifdef CONFIG_MTD_CFI_I1
18 #define cfi_interleave(cfi) 1
19 #define cfi_interleave_is_1(cfi) (cfi_interleave(cfi) == 1)
21 #define cfi_interleave_is_1(cfi) (0)
24 #ifdef CONFIG_MTD_CFI_I2
25 # ifdef cfi_interleave
26 # undef cfi_interleave
27 # define cfi_interleave(cfi) ((cfi)->interleave)
29 # define cfi_interleave(cfi) 2
31 #define cfi_interleave_is_2(cfi) (cfi_interleave(cfi) == 2)
33 #define cfi_interleave_is_2(cfi) (0)
36 #ifdef CONFIG_MTD_CFI_I4
37 # ifdef cfi_interleave
38 # undef cfi_interleave
39 # define cfi_interleave(cfi) ((cfi)->interleave)
41 # define cfi_interleave(cfi) 4
43 #define cfi_interleave_is_4(cfi) (cfi_interleave(cfi) == 4)
45 #define cfi_interleave_is_4(cfi) (0)
48 #ifdef CONFIG_MTD_CFI_I8
49 # ifdef cfi_interleave
50 # undef cfi_interleave
51 # define cfi_interleave(cfi) ((cfi)->interleave)
53 # define cfi_interleave(cfi) 8
55 #define cfi_interleave_is_8(cfi) (cfi_interleave(cfi) == 8)
57 #define cfi_interleave_is_8(cfi) (0)
60 #ifndef cfi_interleave
61 #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
62 static inline int cfi_interleave(void *cfi)
69 static inline int cfi_interleave_supported(int i)
72 #ifdef CONFIG_MTD_CFI_I1
75 #ifdef CONFIG_MTD_CFI_I2
78 #ifdef CONFIG_MTD_CFI_I4
81 #ifdef CONFIG_MTD_CFI_I8
92 /* NB: these values must represents the number of bytes needed to meet the
93 * device type (x8, x16, x32). Eg. a 32 bit device is 4 x 8 bytes.
94 * These numbers are used in calculations.
96 #define CFI_DEVICETYPE_X8 (8 / 8)
97 #define CFI_DEVICETYPE_X16 (16 / 8)
98 #define CFI_DEVICETYPE_X32 (32 / 8)
99 #define CFI_DEVICETYPE_X64 (64 / 8)
101 /* NB: We keep these structures in memory in HOST byteorder, except
102 * where individually noted.
105 /* Basic Query Structure */
116 uint8_t WordWriteTimeoutTyp;
117 uint8_t BufWriteTimeoutTyp;
118 uint8_t BlockEraseTimeoutTyp;
119 uint8_t ChipEraseTimeoutTyp;
120 uint8_t WordWriteTimeoutMax;
121 uint8_t BufWriteTimeoutMax;
122 uint8_t BlockEraseTimeoutMax;
123 uint8_t ChipEraseTimeoutMax;
125 uint16_t InterfaceDesc;
126 uint16_t MaxBufWriteSize;
127 uint8_t NumEraseRegions;
128 uint32_t EraseRegionInfo[0]; /* Not host ordered */
129 } __attribute__((packed));
131 /* Extended Query Structure for both PRI and ALT */
133 struct cfi_extquery {
135 uint8_t MajorVersion;
136 uint8_t MinorVersion;
137 } __attribute__((packed));
139 /* Vendor-Specific PRI for Intel/Sharp Extended Command Set (0x0001) */
141 struct cfi_pri_intelext {
143 uint8_t MajorVersion;
144 uint8_t MinorVersion;
145 uint32_t FeatureSupport; /* if bit 31 is set then an additional uint32_t feature
146 block follows - FIXME - not currently supported */
147 uint8_t SuspendCmdSupport;
148 uint16_t BlkStatusRegMask;
151 uint8_t NumProtectionFields;
152 uint16_t ProtRegAddr;
153 uint8_t FactProtRegSize;
154 uint8_t UserProtRegSize;
156 } __attribute__((packed));
158 struct cfi_intelext_otpinfo {
159 uint32_t ProtRegAddr;
161 uint8_t FactProtRegSize;
163 uint8_t UserProtRegSize;
164 } __attribute__((packed));
166 struct cfi_intelext_blockinfo {
167 uint16_t NumIdentBlocks;
169 uint16_t MinBlockEraseCycles;
172 } __attribute__((packed));
174 struct cfi_intelext_regioninfo {
175 uint16_t NumIdentPartitions;
176 uint8_t NumOpAllowed;
177 uint8_t NumOpAllowedSimProgMode;
178 uint8_t NumOpAllowedSimEraMode;
179 uint8_t NumBlockTypes;
180 struct cfi_intelext_blockinfo BlockTypes[1];
181 } __attribute__((packed));
183 struct cfi_intelext_programming_regioninfo {
184 uint8_t ProgRegShift;
186 uint8_t ControlValid;
188 uint8_t ControlInvalid;
190 } __attribute__((packed));
192 /* Vendor-Specific PRI for AMD/Fujitsu Extended Command Set (0x0002) */
194 struct cfi_pri_amdstd {
196 uint8_t MajorVersion;
197 uint8_t MinorVersion;
198 uint8_t SiliconRevision; /* bits 1-0: Address Sensitive Unlock */
199 uint8_t EraseSuspend;
201 uint8_t TmpBlkUnprotect;
202 uint8_t BlkProtUnprot;
203 uint8_t SimultaneousOps;
209 } __attribute__((packed));
211 /* Vendor-Specific PRI for Atmel chips (command set 0x0002) */
213 struct cfi_pri_atmel {
215 uint8_t MajorVersion;
216 uint8_t MinorVersion;
221 } __attribute__((packed));
223 struct cfi_pri_query {
225 uint32_t ProtField[1]; /* Not host ordered */
226 } __attribute__((packed));
228 struct cfi_bri_query {
229 uint8_t PageModeReadCap;
231 uint32_t ConfField[1]; /* Not host ordered */
232 } __attribute__((packed));
234 #define P_ID_NONE 0x0000
235 #define P_ID_INTEL_EXT 0x0001
236 #define P_ID_AMD_STD 0x0002
237 #define P_ID_INTEL_STD 0x0003
238 #define P_ID_AMD_EXT 0x0004
239 #define P_ID_WINBOND 0x0006
240 #define P_ID_ST_ADV 0x0020
241 #define P_ID_MITSUBISHI_STD 0x0100
242 #define P_ID_MITSUBISHI_EXT 0x0101
243 #define P_ID_SST_PAGE 0x0102
244 #define P_ID_INTEL_PERFORMANCE 0x0200
245 #define P_ID_INTEL_DATA 0x0210
246 #define P_ID_RESERVED 0xffff
249 #define CFI_MODE_CFI 1
250 #define CFI_MODE_JEDEC 0
257 int cfi_mode; /* Are we a JEDEC device pretending to be CFI? */
260 struct mtd_info *(*cmdset_setup)(struct map_info *);
261 struct cfi_ident *cfiq; /* For now only one. We insist that all devs
262 must be of the same type. */
265 unsigned long chipshift; /* Because they're of the same type */
266 const char *im_name; /* inter_module name for cmdset_setup */
267 struct flchip chips[0]; /* per-chip data structure for each chip */
271 * Returns the command address according to the given geometry.
273 static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs, int interleave, int type)
275 return (cmd_ofs * type) * interleave;
279 * Transforms the CFI command for the given geometry (bus width & interleave).
280 * It looks too long to be inline, but in the common case it should almost all
281 * get optimised away.
283 static inline map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
285 map_word val = { {0} };
286 int wordwidth, words_per_bus, chip_mode, chips_per_word;
287 unsigned long onecmd;
290 /* We do it this way to give the compiler a fighting chance
291 of optimising away all the crap for 'bankwidth' larger than
292 an unsigned long, in the common case where that support is
294 if (map_bankwidth_is_large(map)) {
295 wordwidth = sizeof(unsigned long);
296 words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
298 wordwidth = map_bankwidth(map);
302 chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
303 chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
305 /* First, determine what the bit-pattern should be for a single
306 device, according to chip mode and endianness... */
313 onecmd = cpu_to_cfi16(cmd);
316 onecmd = cpu_to_cfi32(cmd);
320 /* Now replicate it across the size of an unsigned long, or
321 just to the bus width as appropriate */
322 switch (chips_per_word) {
324 #if BITS_PER_LONG >= 64
326 onecmd |= (onecmd << (chip_mode * 32));
329 onecmd |= (onecmd << (chip_mode * 16));
331 onecmd |= (onecmd << (chip_mode * 8));
336 /* And finally, for the multi-word case, replicate it
337 in all words in the structure */
338 for (i=0; i < words_per_bus; i++) {
344 #define CMD(x) cfi_build_cmd((x), map, cfi)
347 static inline unsigned long cfi_merge_status(map_word val, struct map_info *map,
348 struct cfi_private *cfi)
350 int wordwidth, words_per_bus, chip_mode, chips_per_word;
351 unsigned long onestat, res = 0;
354 /* We do it this way to give the compiler a fighting chance
355 of optimising away all the crap for 'bankwidth' larger than
356 an unsigned long, in the common case where that support is
358 if (map_bankwidth_is_large(map)) {
359 wordwidth = sizeof(unsigned long);
360 words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
362 wordwidth = map_bankwidth(map);
366 chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
367 chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
370 /* Or all status words together */
371 for (i=1; i < words_per_bus; i++) {
376 switch(chips_per_word) {
378 #if BITS_PER_LONG >= 64
380 res |= (onestat >> (chip_mode * 32));
383 res |= (onestat >> (chip_mode * 16));
385 res |= (onestat >> (chip_mode * 8));
390 /* Last, determine what the bit-pattern should be for a single
391 device, according to chip mode and endianness... */
396 res = cfi16_to_cpu(res);
399 res = cfi32_to_cpu(res);
406 #define MERGESTATUS(x) cfi_merge_status((x), map, cfi)
410 * Sends a CFI command to a bank of flash for the given geometry.
412 * Returns the offset in flash where the command was written.
413 * If prev_val is non-null, it will be set to the value at the command address,
414 * before the command was written.
416 static inline uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
417 struct map_info *map, struct cfi_private *cfi,
418 int type, map_word *prev_val)
421 uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, cfi_interleave(cfi), type);
423 val = cfi_build_cmd(cmd, map, cfi);
426 *prev_val = map_read(map, addr);
428 map_write(map, val, addr);
433 static inline uint8_t cfi_read_query(struct map_info *map, uint32_t addr)
435 map_word val = map_read(map, addr);
437 if (map_bankwidth_is_1(map)) {
439 } else if (map_bankwidth_is_2(map)) {
440 return cfi16_to_cpu(val.x[0]);
442 /* No point in a 64-bit byteswap since that would just be
443 swapping the responses from different chips, and we are
444 only interested in one chip (a representative sample) */
445 return cfi32_to_cpu(val.x[0]);
449 static inline uint16_t cfi_read_query16(struct map_info *map, uint32_t addr)
451 map_word val = map_read(map, addr);
453 if (map_bankwidth_is_1(map)) {
454 return val.x[0] & 0xff;
455 } else if (map_bankwidth_is_2(map)) {
456 return cfi16_to_cpu(val.x[0]);
458 /* No point in a 64-bit byteswap since that would just be
459 swapping the responses from different chips, and we are
460 only interested in one chip (a representative sample) */
461 return cfi32_to_cpu(val.x[0]);
465 static inline void cfi_udelay(int us)
468 msleep((us+999)/1000);
475 struct cfi_extquery *cfi_read_pri(struct map_info *map, uint16_t adr, uint16_t size,
480 void (*fixup)(struct mtd_info *mtd, void* param);
484 #define CFI_MFR_ANY 0xffff
485 #define CFI_ID_ANY 0xffff
487 #define CFI_MFR_AMD 0x0001
488 #define CFI_MFR_ATMEL 0x001F
489 #define CFI_MFR_ST 0x0020 /* STMicroelectronics */
491 void cfi_fixup(struct mtd_info *mtd, struct cfi_fixup* fixups);
493 typedef int (*varsize_frob_t)(struct map_info *map, struct flchip *chip,
494 unsigned long adr, int len, void *thunk);
496 int cfi_varsize_frob(struct mtd_info *mtd, varsize_frob_t frob,
497 loff_t ofs, size_t len, void *thunk);
500 #endif /* __MTD_CFI_H__ */