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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 <borneo.antonio@gmail.com>
__archive__
Antonio Borneo 2010-04-23 12:07:53 +08:00 committed by Øyvind Harboe
parent 61bb0d3d23
commit a69cbf0f74
1 changed files with 22 additions and 25 deletions
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47
src/flash/nor/cfi.c
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@ -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);