diff options
Diffstat (limited to 'drivers/mtd/maps')
| -rw-r--r-- | drivers/mtd/maps/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/mtd/maps/gpio-addr-flash.c | 42 | ||||
| -rw-r--r-- | drivers/mtd/maps/pcmciamtd.c | 2 | ||||
| -rw-r--r-- | drivers/mtd/maps/physmap_of.c | 6 |
4 files changed, 35 insertions, 17 deletions
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig index 21b2874a303..ba801d2c6dc 100644 --- a/drivers/mtd/maps/Kconfig +++ b/drivers/mtd/maps/Kconfig @@ -249,7 +249,7 @@ config MTD_CFI_FLAGADM config MTD_SOLUTIONENGINE tristate "CFI Flash device mapped on Hitachi SolutionEngine" - depends on SUPERH && SOLUTION_ENGINE && MTD_CFI && MTD_REDBOOT_PARTS + depends on SOLUTION_ENGINE && MTD_CFI && MTD_REDBOOT_PARTS help This enables access to the flash chips on the Hitachi SolutionEngine and similar boards. Say 'Y' if you are building a kernel for such a board. diff --git a/drivers/mtd/maps/gpio-addr-flash.c b/drivers/mtd/maps/gpio-addr-flash.c index a4c477b9fdd..2fb346091af 100644 --- a/drivers/mtd/maps/gpio-addr-flash.c +++ b/drivers/mtd/maps/gpio-addr-flash.c @@ -99,22 +99,28 @@ static map_word gf_read(struct map_info *map, unsigned long ofs) * @from: flash offset to copy from * @len: how much to copy * - * We rely on the MTD layer to chunk up copies such that a single request here - * will not cross a window size. This allows us to only wiggle the GPIOs once - * before falling back to a normal memcpy. Reading the higher layer code shows - * that this is indeed the case, but add a BUG_ON() to future proof. + * The "from" region may straddle more than one window, so toggle the GPIOs for + * each window region before reading its data. */ static void gf_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) { struct async_state *state = gf_map_info_to_state(map); - gf_set_gpios(state, from); + int this_len; - /* BUG if operation crosses the win_size */ - BUG_ON(!((from + len) % state->win_size <= (from + len))); + while (len) { + if ((from % state->win_size) + len > state->win_size) + this_len = state->win_size - (from % state->win_size); + else + this_len = len; - /* operation does not cross the win_size, so one shot it */ - memcpy_fromio(to, map->virt + (from % state->win_size), len); + gf_set_gpios(state, from); + memcpy_fromio(to, map->virt + (from % state->win_size), + this_len); + len -= this_len; + from += this_len; + to += this_len; + } } /** @@ -147,13 +153,21 @@ static void gf_copy_to(struct map_info *map, unsigned long to, { struct async_state *state = gf_map_info_to_state(map); - gf_set_gpios(state, to); + int this_len; + + while (len) { + if ((to % state->win_size) + len > state->win_size) + this_len = state->win_size - (to % state->win_size); + else + this_len = len; - /* BUG if operation crosses the win_size */ - BUG_ON(!((to + len) % state->win_size <= (to + len))); + gf_set_gpios(state, to); + memcpy_toio(map->virt + (to % state->win_size), from, len); - /* operation does not cross the win_size, so one shot it */ - memcpy_toio(map->virt + (to % state->win_size), from, len); + len -= this_len; + to += this_len; + from += this_len; + } } static const char * const part_probe_types[] = { diff --git a/drivers/mtd/maps/pcmciamtd.c b/drivers/mtd/maps/pcmciamtd.c index a3cfad392ed..af747af5eee 100644 --- a/drivers/mtd/maps/pcmciamtd.c +++ b/drivers/mtd/maps/pcmciamtd.c @@ -89,7 +89,7 @@ static caddr_t remap_window(struct map_info *map, unsigned long to) if (!pcmcia_dev_present(dev->p_dev)) { pr_debug("device removed\n"); - return 0; + return NULL; } offset = to & ~(dev->win_size-1); diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c index 217c25d7381..c1d21cb501c 100644 --- a/drivers/mtd/maps/physmap_of.c +++ b/drivers/mtd/maps/physmap_of.c @@ -103,7 +103,7 @@ static struct mtd_info *obsolete_probe(struct platform_device *dev, if (strcmp(of_probe, "ROM") != 0) dev_warn(&dev->dev, "obsolete_probe: don't know probe " "type '%s', mapping as rom\n", of_probe); - return do_map_probe("mtd_rom", map); + return do_map_probe("map_rom", map); } } @@ -340,6 +340,10 @@ static struct of_device_id of_flash_match[] = { .data = (void *)"map_ram", }, { + .compatible = "mtd-rom", + .data = (void *)"map_rom", + }, + { .type = "rom", .compatible = "direct-mapped" }, |