From a69cbf0f74015993d749bdfe1a80f4b5a8bb6dc3 Mon Sep 17 00:00:00 2001 From: Antonio Borneo Date: Fri, 23 Apr 2010 12:07:53 +0800 Subject: [PATCH] NOR/CFI: use bus_width for memory access on flash ID. NOR flash structure requires each access to be bus_width wide. Fix read of flash ID accordingly to rule above. Add case (chip_width == 4), allowed by CFI spec and coherent with current value of CFI_MAX_CHIP_WIDTH but currently not used by any target. Signed-off-by: Antonio Borneo --- src/flash/nor/cfi.c | 47 ++++++++++++++++++++++------------------------- 1 file changed, 22 insertions(+), 25 deletions(-) diff --git a/src/flash/nor/cfi.c b/src/flash/nor/cfi.c index ca2fb0bb8..a6165c6f6 100644 --- a/src/flash/nor/cfi.c +++ b/src/flash/nor/cfi.c @@ -2105,6 +2105,7 @@ static int cfi_probe(struct flash_bank *bank) uint32_t unlock1 = 0x555; uint32_t unlock2 = 0x2aa; int retval; + uint8_t value_buf0[CFI_MAX_BUS_WIDTH], value_buf1[CFI_MAX_BUS_WIDTH]; if (bank->target->state != TARGET_HALTED) { @@ -2137,34 +2138,30 @@ static int cfi_probe(struct flash_bank *bank) return retval; } - if (bank->chip_width == 1) + if ((retval = target_read_memory(target, flash_address(bank, 0, 0x00), bank->bus_width, 1, value_buf0)) != ERROR_OK) { - uint8_t manufacturer, device_id; - /* FIXME: access flash at bus_width size */ - if ((retval = target_read_u8(target, flash_address(bank, 0, 0x00), &manufacturer)) != ERROR_OK) - { - return retval; - } - /* FIXME: access flash at bus_width size */ - if ((retval = target_read_u8(target, flash_address(bank, 0, 0x01), &device_id)) != ERROR_OK) - { - return retval; - } - cfi_info->manufacturer = manufacturer; - cfi_info->device_id = device_id; + return retval; } - else if (bank->chip_width == 2) + if ((retval = target_read_memory(target, flash_address(bank, 0, 0x01), bank->bus_width, 1, value_buf1)) != ERROR_OK) { - /* FIXME: access flash at bus_width size */ - if ((retval = target_read_u16(target, flash_address(bank, 0, 0x00), &cfi_info->manufacturer)) != ERROR_OK) - { - return retval; - } - /* FIXME: access flash at bus_width size */ - if ((retval = target_read_u16(target, flash_address(bank, 0, 0x01), &cfi_info->device_id)) != ERROR_OK) - { - return retval; - } + return retval; + } + switch (bank->chip_width) { + case 1: + cfi_info->manufacturer = *value_buf0; + cfi_info->device_id = *value_buf1; + break; + case 2: + cfi_info->manufacturer = target_buffer_get_u16(target, value_buf0); + cfi_info->device_id = target_buffer_get_u16(target, value_buf1); + break; + case 4: + cfi_info->manufacturer = target_buffer_get_u32(target, value_buf0); + cfi_info->device_id = target_buffer_get_u32(target, value_buf1); + break; + default: + LOG_ERROR("Unsupported bank chipwidth %d, can't probe memory", bank->chip_width); + return ERROR_FLASH_OPERATION_FAILED; } LOG_INFO("Flash Manufacturer/Device: 0x%04x 0x%04x", cfi_info->manufacturer, cfi_info->device_id); -- 2.11.4.GIT