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Common MTD:

Browse source 
* Add Kconfig option for keeping both the 'master' and 'partition' MTDs
    registered as devices. This would really make a better default if we could
    do it over, as it allows a lot more flexibility in (1) determining the flash
    topology of the system from user-space and (2) adding temporary partitions
    at runtime (ioctl(BLKPG)). Unfortunately, this would possibly cause
    user-space breakage, as it will cause renumbering of the /dev/mtdX devices.
    We'll see if we can change this in the future, as there have already been a
    few people looking for this feature, and I know others have just been
    working around our current limitations instead of fixing them this way.
  * Along with the previous change, add some additional information to sysfs, so
    user-space can read the offset of each partition within its master device
 
 SPI NOR:
  * add new device tree compatible binding to represent the mostly-compatible
    class of SPI NOR flash which can be detected by their extended JEDEC ID
    bytes, cutting down the duplication of our ID tables
  * misc. new IDs
 
 Various other miscellaneous fixes and changes
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Merge tag 'for-linus-20150422' of git://git.infradead.org/linux-mtd

Pull MTD updates from Brian Norris:
 "Common MTD:

   - Add Kconfig option for keeping both the 'master' and 'partition'
     MTDs registered as devices.  This would really make a better
     default if we could do it over, as it allows a lot more flexibility
     in (1) determining the flash topology of the system from user-space
     and (2) adding temporary partitions at runtime (ioctl(BLKPG)).

     Unfortunately, this would possibly cause user-space breakage, as it
     will cause renumbering of the /dev/mtdX devices.  We'll see if we
     can change this in the future, as there have already been a few
     people looking for this feature, and I know others have just been
     working around our current limitations instead of fixing them this
     way.

   - Along with the previous change, add some additional information to
     sysfs, so user-space can read the offset of each partition within
     its master device

  SPI NOR:

   - add new device tree compatible binding to represent the
     mostly-compatible class of SPI NOR flash which can be detected by
     their extended JEDEC ID bytes, cutting down the duplication of our
     ID tables

   - misc.  new IDs

  Various other miscellaneous fixes and changes"

* tag 'for-linus-20150422' of git://git.infradead.org/linux-mtd: (53 commits)
  mtd: spi-nor: Add support for Macronix mx25u6435f serial flash
  mtd: spi-nor: Add support for Winbond w25q64dw serial flash
  mtd: spi-nor: add support for the Winbond W25X05 flash
  mtd: spi-nor: support en25s64 device
  mtd: m25p80: bind to "nor-jedec" ID, for auto-detection
  Documentation: devicetree: m25p80: add "nor-jedec" binding
  mtd: Make MTD tests cancelable
  mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3
  mtd: docg3: remove invalid __exit annotations
  mtd: fsl_ifc_nand: use msecs_to_jiffies for time conversion
  mtd: atmel_nand: don't map the ROM table if no pmecc table offset in DT
  mtd: atmel_nand: add a definition for the oob reserved bytes
  mtd: part: Remove partition overlap checks
  mtd: part: Add sysfs variable for offset of partition
  mtd: part: Create the master device node when partitioned
  mtd: ts5500_flash: Fix typo in MODULE_DESCRIPTION in ts5500_flash.c
  mtd: denali: Disable sub-page writes in Denali NAND driver
  mtd: pxa3xx_nand: cleanup wait_for_completion handling
  mtd: nand: gpmi: Check for scan_bbt() error
  mtd: nand: gpmi: fixup return type of wait_for_completion_timeout
  ...
This commit is contained in:
Linus Torvalds 2015-04-22 12:00:44 -07:00
commit a62d016cec
42 changed files with 642 additions and 320 deletions
Download patch file Download diff file Expand all files Collapse all files

54
include/linux/mtd/map.h
View file

@ -77,7 +77,7 @@
/* ensure we never evaluate anything shorted than an unsigned long
* to zero, and ensure we'll never miss the end of an comparison (bjd) */
#define map_calc_words(map) ((map_bankwidth(map) + (sizeof(unsigned long)-1))/ sizeof(unsigned long))
#define map_calc_words(map) ((map_bankwidth(map) + (sizeof(unsigned long)-1)) / sizeof(unsigned long))
#ifdef CONFIG_MTD_MAP_BANK_WIDTH_8
# ifdef map_bankwidth
@ -181,7 +181,7 @@ static inline int map_bankwidth_supported(int w)
}
}
#define MAX_MAP_LONGS ( ((MAX_MAP_BANKWIDTH*8) + BITS_PER_LONG - 1) / BITS_PER_LONG )
#define MAX_MAP_LONGS (((MAX_MAP_BANKWIDTH * 8) + BITS_PER_LONG - 1) / BITS_PER_LONG)
typedef union {
unsigned long x[MAX_MAP_LONGS];
@ -264,20 +264,22 @@ void unregister_mtd_chip_driver(struct mtd_chip_driver *);
struct mtd_info *do_map_probe(const char *name, struct map_info *map);
void map_destroy(struct mtd_info *mtd);
#define ENABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 1); } while(0)
#define DISABLE_VPP(map) do { if(map->set_vpp) map->set_vpp(map, 0); } while(0)
#define ENABLE_VPP(map) do { if (map->set_vpp) map->set_vpp(map, 1); } while (0)
#define DISABLE_VPP(map) do { if (map->set_vpp) map->set_vpp(map, 0); } while (0)
#define INVALIDATE_CACHED_RANGE(map, from, size) \
do { if(map->inval_cache) map->inval_cache(map, from, size); } while(0)
do { if (map->inval_cache) map->inval_cache(map, from, size); } while (0)
static inline int map_word_equal(struct map_info *map, map_word val1, map_word val2)
{
int i;
for (i=0; i<map_words(map); i++) {
for (i = 0; i < map_words(map); i++) {
if (val1.x[i] != val2.x[i])
return 0;
}
return 1;
}
@ -286,9 +288,9 @@ static inline map_word map_word_and(struct map_info *map, map_word val1, map_wor
map_word r;
int i;
for (i=0; i<map_words(map); i++) {
for (i = 0; i < map_words(map); i++)
r.x[i] = val1.x[i] & val2.x[i];
}
return r;
}
@ -297,9 +299,9 @@ static inline map_word map_word_clr(struct map_info *map, map_word val1, map_wor
map_word r;
int i;
for (i=0; i<map_words(map); i++) {
for (i = 0; i < map_words(map); i++)
r.x[i] = val1.x[i] & ~val2.x[i];
}
return r;
}
@ -308,22 +310,33 @@ static inline map_word map_word_or(struct map_info *map, map_word val1, map_word
map_word r;
int i;
for (i=0; i<map_words(map); i++) {
for (i = 0; i < map_words(map); i++)
r.x[i] = val1.x[i] | val2.x[i];
}
return r;
}
#define map_word_andequal(m, a, b, z) map_word_equal(m, z, map_word_and(m, a, b))
static inline int map_word_andequal(struct map_info *map, map_word val1, map_word val2, map_word val3)
{
int i;
for (i = 0; i < map_words(map); i++) {
if ((val1.x[i] & val2.x[i]) != val3.x[i])
return 0;
}
return 1;
}
static inline int map_word_bitsset(struct map_info *map, map_word val1, map_word val2)
{
int i;
for (i=0; i<map_words(map); i++) {
for (i = 0; i < map_words(map); i++) {
if (val1.x[i] & val2.x[i])
return 1;
}
return 0;
}
@ -355,14 +368,16 @@ static inline map_word map_word_load_partial(struct map_info *map, map_word orig
if (map_bankwidth_is_large(map)) {
char *dest = (char *)&orig;
memcpy(dest+start, buf, len);
} else {
for (i=start; i < start+len; i++) {
for (i = start; i < start+len; i++) {
int bitpos;
#ifdef __LITTLE_ENDIAN
bitpos = i*8;
bitpos = i * 8;
#else /* __BIG_ENDIAN */
bitpos = (map_bankwidth(map)-1-i)*8;
bitpos = (map_bankwidth(map) - 1 - i) * 8;
#endif
orig.x[0] &= ~(0xff << bitpos);
orig.x[0] |= (unsigned long)buf[i-start] << bitpos;
@ -384,9 +399,10 @@ static inline map_word map_word_ff(struct map_info *map)
if (map_bankwidth(map) < MAP_FF_LIMIT) {
int bw = 8 * map_bankwidth(map);
r.x[0] = (1UL << bw) - 1;
} else {
for (i=0; i<map_words(map); i++)
for (i = 0; i < map_words(map); i++)
r.x[i] = ~0UL;
}
return r;
@ -407,7 +423,7 @@ static inline map_word inline_map_read(struct map_info *map, unsigned long ofs)
r.x[0] = __raw_readq(map->virt + ofs);
#endif
else if (map_bankwidth_is_large(map))
memcpy_fromio(r.x, map->virt+ofs, map->bankwidth);
memcpy_fromio(r.x, map->virt + ofs, map->bankwidth);
else
BUG();

5
include/linux/mtd/spi-nor.h
View file

@ -155,6 +155,8 @@ enum spi_nor_option_flags {
* @write: [DRIVER-SPECIFIC] write data to the SPI NOR
* @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
* at the offset @offs
* @lock: [FLASH-SPECIFIC] lock a region of the SPI NOR
* @unlock: [FLASH-SPECIFIC] unlock a region of the SPI NOR
* @priv: the private data
*/
struct spi_nor {
@ -189,6 +191,9 @@ struct spi_nor {
size_t len, size_t *retlen, const u_char *write_buf);
int (*erase)(struct spi_nor *nor, loff_t offs);
int (*flash_lock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
int (*flash_unlock)(struct spi_nor *nor, loff_t ofs, uint64_t len);
void *priv;
};