@@ -2529,6 +2529,34 @@ static int spi_nor_map_cmp_erase_type(const void *l, const void *r)
}
/**
+ * spi_nor_sort_erase_mask() - sort erase mask
+ * @map: the erase map of the SPI NOR
+ * @erase_mask: the erase type mask to be sorted
+ *
+ * Replicate the sort done for the map's erase types in BFPT: sort the erase
+ * mask in ascending order with the smallest erase type size starting from
+ * BIT(0) in the sorted erase mask.
+ *
+ * Return: sorted erase mask.
+ */
+static u8 spi_nor_sort_erase_mask(struct spi_nor_erase_map *map, u8 erase_mask)
+{
+ struct spi_nor_erase_type *erase_type = map->erase_type;
+ int i;
+ u8 sorted_erase_mask = 0;
+
+ if (!erase_mask)
+ return 0;
+
+ /* Replicate the sort done for the map's erase types. */
+ for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++)
+ if (erase_type[i].size && erase_mask & BIT(erase_type[i].idx))
+ sorted_erase_mask |= BIT(i);
+
+ return sorted_erase_mask;
+}
+
+/**
* spi_nor_regions_sort_erase_types() - sort erase types in each region
* @map: the erase map of the SPI NOR
*
@@ -2543,19 +2571,13 @@ static int spi_nor_map_cmp_erase_type(const void *l, const void *r)
static void spi_nor_regions_sort_erase_types(struct spi_nor_erase_map *map)
{
struct spi_nor_erase_region *region = map->regions;
- struct spi_nor_erase_type *erase_type = map->erase_type;
- int i;
u8 region_erase_mask, sorted_erase_mask;
while (region) {
region_erase_mask = region->offset & SNOR_ERASE_TYPE_MASK;
- /* Replicate the sort done for the map's erase types. */
- sorted_erase_mask = 0;
- for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++)
- if (erase_type[i].size &&
- region_erase_mask & BIT(erase_type[i].idx))
- sorted_erase_mask |= BIT(i);
+ sorted_erase_mask = spi_nor_sort_erase_mask(map,
+ region_erase_mask);
/* Overwrite erase mask. */
region->offset = (region->offset & ~SNOR_ERASE_TYPE_MASK) |
@@ -2985,7 +3007,7 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
u64 offset;
u32 region_count;
int i, j;
- u8 erase_type;
+ u8 erase_type, uniform_erase_type;
region_count = SMPT_MAP_REGION_COUNT(*smpt);
/*
@@ -2998,7 +3020,7 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
return -ENOMEM;
map->regions = region;
- map->uniform_erase_type = 0xff;
+ uniform_erase_type = 0xff;
offset = 0;
/* Populate regions. */
for (i = 0; i < region_count; i++) {
@@ -3013,12 +3035,15 @@ static int spi_nor_init_non_uniform_erase_map(struct spi_nor *nor,
* Save the erase types that are supported in all regions and
* can erase the entire flash memory.
*/
- map->uniform_erase_type &= erase_type;
+ uniform_erase_type &= erase_type;
offset = (region[i].offset & ~SNOR_ERASE_FLAGS_MASK) +
region[i].size;
}
+ map->uniform_erase_type = spi_nor_sort_erase_mask(map,
+ uniform_erase_type);
+
spi_nor_region_mark_end(®ion[i - 1]);
return 0;
There are uniform, non-uniform and flexible erase flash configurations. The non-uniform erase types, are the erase types that can _not_ erase the entire flash by their own. As the code was, in case flashes had flexible erase capabilities (support both uniform and non-uniform erase types in the same flash configuration) and supported multiple uniform erase type sizes, the code did not sort the uniform erase types, and could select a wrong erase type size. Sort the uniform erase mask in case of flexible erase flash configurations, in order to select the best uniform erase type size. Uniform, non-uniform, and flexible configurations with just a valid uniform erase type, are not affected by this change. Uniform erase tested on mx25l3273fm2i-08g and sst26vf064B-104i/sn. Non uniform erase tested on sst26vf064B-104i/sn. Fixes: 5390a8df769e ("mtd: spi-nor: add support to non-uniform SFDP SPI NOR flash memories") Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> --- v2: drop uneeded change drivers/mtd/spi-nor/spi-nor.c | 47 +++++++++++++++++++++++++++++++++---------- 1 file changed, 36 insertions(+), 11 deletions(-)