diff options
author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-12-05 15:03:26 (GMT) |
---|---|---|
committer | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-12-08 15:08:33 (GMT) |
commit | 7a3620b24649663857d99e8ab73ec0b3bd60e50e (patch) | |
tree | 550362162350c26d1a7c853fa846632dd26a62e6 /arch/arm/cpu/armv7/uniphier/support_card.c | |
parent | dc7246e725cda125382df548115e73e7e000728c (diff) | |
download | u-boot-7a3620b24649663857d99e8ab73ec0b3bd60e50e.tar.xz |
ARM: UniPhier: detect the number of flash banks at run-time
Some UniPhier boards are equipped with an expansion slot that
some optional SRAM/NOR-flash cards can be attached to. So, run-time
detection of the number of flash banks would be more user-friendly.
Until this commit, UniPhier boards have achieved this by (ab)using
board_flash_wp_on() because the boot failed if flash_size got zero.
Fortunately, this problem was solved by commit 70879a92561a (flash:
do not fail even if flash_size is zero).
Now it is possible to throw away such a tricky workaround. This
commit also enables CONFIG_SYS_MAX_FLASH_BANKS_DETECT for further
refactoring.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Diffstat (limited to 'arch/arm/cpu/armv7/uniphier/support_card.c')
-rw-r--r-- | arch/arm/cpu/armv7/uniphier/support_card.c | 125 |
1 files changed, 85 insertions, 40 deletions
diff --git a/arch/arm/cpu/armv7/uniphier/support_card.c b/arch/arm/cpu/armv7/uniphier/support_card.c index 40d4940..419012e 100644 --- a/arch/arm/cpu/armv7/uniphier/support_card.c +++ b/arch/arm/cpu/armv7/uniphier/support_card.c @@ -83,6 +83,12 @@ static int support_card_show_revision(void) } #endif +int check_support_card(void) +{ + printf("SC: Micro Support Card "); + return support_card_show_revision(); +} + void support_card_init(void) { /* @@ -94,12 +100,6 @@ void support_card_init(void) support_card_reset_deassert(); } -int check_support_card(void) -{ - printf("SC: Micro Support Card "); - return support_card_show_revision(); -} - #if defined(CONFIG_SMC911X) #include <netdev.h> @@ -112,18 +112,14 @@ int board_eth_init(bd_t *bis) #if !defined(CONFIG_SYS_NO_FLASH) #include <mtd/cfi_flash.h> +#include <asm/arch/sbc-regs.h> -#if CONFIG_SYS_MAX_FLASH_BANKS > 1 -static phys_addr_t flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS] = - CONFIG_SYS_FLASH_BANKS_LIST; +struct memory_bank { + phys_addr_t base; + unsigned long size; +}; -phys_addr_t cfi_flash_bank_addr(int i) -{ - return flash_banks_list[i]; -} -#endif - -int mem_is_flash(phys_addr_t base) +static int mem_is_flash(const struct memory_bank *mem) { const int loop = 128; u32 *scratch_addr; @@ -131,8 +127,9 @@ int mem_is_flash(phys_addr_t base) int ret = 1; int i; - scratch_addr = map_physmem(base + 0x01e00000, - sizeof(u32) * loop, MAP_NOCACHE); + /* just in case, use the tail of the memory bank */ + scratch_addr = map_physmem(mem->base + mem->size - sizeof(u32) * loop, + sizeof(u32) * loop, MAP_NOCACHE); for (i = 0; i < loop; i++, scratch_addr++) { saved_value = readl(scratch_addr); @@ -150,31 +147,79 @@ int mem_is_flash(phys_addr_t base) return ret; } -int board_flash_wp_on(void) +#if defined(CONFIG_PFC_MICRO_SUPPORT_CARD) + /* {address, size} */ +static const struct memory_bank memory_banks_boot_swap_off[] = { + {0x02000000, 0x01f00000}, +}; + +static const struct memory_bank memory_banks_boot_swap_on[] = { + {0x00000000, 0x01f00000}, +}; +#endif + +#if defined(CONFIG_DCC_MICRO_SUPPORT_CARD) +static const struct memory_bank memory_banks_boot_swap_off[] = { + {0x04000000, 0x04000000}, +}; + +static const struct memory_bank memory_banks_boot_swap_on[] = { + {0x00000000, 0x04000000}, + {0x04000000, 0x04000000}, +}; +#endif + +static const struct memory_bank +*flash_banks_list[CONFIG_SYS_MAX_FLASH_BANKS_DETECT]; + +phys_addr_t cfi_flash_bank_addr(int i) { - int i; - int ret = 1; + return flash_banks_list[i]->base; +} - for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { - if (mem_is_flash(cfi_flash_bank_addr(i))) { - /* - * We found at least one flash. - * We need to return 0 and call flash_init(). - */ - ret = 0; - } -#if CONFIG_SYS_MAX_FLASH_BANKS > 1 - else { - /* - * We might have a SRAM here. - * To prevent SRAM data from being destroyed, - * we set dummy address (SDRAM). - */ - flash_banks_list[i] = 0x80000000 + 0x10000 * i; +unsigned long cfi_flash_bank_size(int i) +{ + return flash_banks_list[i]->size; +} + +static void detect_num_flash_banks(void) +{ + const struct memory_bank *memory_bank, *end; + + cfi_flash_num_flash_banks = 0; + + if (boot_is_swapped()) { + memory_bank = memory_banks_boot_swap_on; + end = memory_bank + ARRAY_SIZE(memory_banks_boot_swap_on); + } else { + memory_bank = memory_banks_boot_swap_off; + end = memory_bank + ARRAY_SIZE(memory_banks_boot_swap_off); + } + + for (; memory_bank < end; memory_bank++) { + if (cfi_flash_num_flash_banks >= + CONFIG_SYS_MAX_FLASH_BANKS_DETECT) + break; + + if (mem_is_flash(memory_bank)) { + flash_banks_list[cfi_flash_num_flash_banks] = + memory_bank; + + debug("flash bank found: base = 0x%lx, size = 0x%lx\n", + memory_bank->base, memory_bank->size); + cfi_flash_num_flash_banks++; } -#endif } - return ret; + debug("number of flash banks: %d\n", cfi_flash_num_flash_banks); +} +#else /* ONFIG_SYS_NO_FLASH */ +void detect_num_flash_banks(void) +{ +}; +#endif /* ONFIG_SYS_NO_FLASH */ + +void support_card_late_init(void) +{ + detect_num_flash_banks(); } -#endif |