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Kinetis: fix preparation of FlexRAM before flash programming 

FlexRAM should be requested before any section programming.
Test FCNFG RAMRDY bit before issuing FTFx_CMD_SETFLEXRAM
to speed up operation and to cover pflash only devices.

Change-Id: Ib0f2d8e8ab8b1507cbf2b7f8565178ab79941f5d
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2990
Tested-by: jenkins
This commit is contained in:
Tomas Vanek 2015-10-01 23:35:12 +02:00 committed by Andreas Fritiofson
parent c161b81b0f
commit 66d9a24b06
1 changed files with 38 additions and 28 deletions
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66
src/flash/nor/kinetis.c
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@ -984,11 +984,41 @@ static int kinetis_erase(struct flash_bank *bank, int first, int last)
return ERROR_OK;
}
static int kinetis_make_ram_ready(struct target *target)
{
int result;
uint8_t ftfx_fstat;
uint8_t ftfx_fcnfg;
/* check if ram ready */
result = target_read_memory(target, FTFx_FCNFG, 1, 1, &ftfx_fcnfg);
if (result != ERROR_OK)
return result;
if (ftfx_fcnfg & (1 << 1))
return ERROR_OK; /* ram ready */
/* make flex ram available */
result = kinetis_ftfx_command(target, FTFx_CMD_SETFLEXRAM, 0x00ff0000,
0, 0, 0, 0, 0, 0, 0, 0, &ftfx_fstat);
if (result != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
/* check again */
result = target_read_memory(target, FTFx_FCNFG, 1, 1, &ftfx_fcnfg);
if (result != ERROR_OK)
return result;
if (ftfx_fcnfg & (1 << 1))
return ERROR_OK; /* ram ready */
return ERROR_FLASH_OPERATION_FAILED;
}
static int kinetis_write(struct flash_bank *bank, const uint8_t *buffer,
uint32_t offset, uint32_t count)
{
unsigned int i, result, fallback = 0;
uint8_t buf[8];
uint32_t wc;
struct kinetis_flash_bank *kinfo = bank->driver_priv;
uint8_t *new_buffer = NULL;
@ -1002,36 +1032,16 @@ static int kinetis_write(struct flash_bank *bank, const uint8_t *buffer,
/* fallback to longword write */
fallback = 1;
LOG_WARNING("This device supports Program Longword execution only.");
LOG_DEBUG("flash write into PFLASH @08%" PRIX32, offset);
} else if (kinfo->flash_class == FC_FLEX_NVM) {
uint8_t ftfx_fstat;
LOG_DEBUG("flash write into FlexNVM @%08" PRIX32, offset);
/* make flex ram available */
result = kinetis_ftfx_command(bank->target, FTFx_CMD_SETFLEXRAM, 0x00ff0000,
0, 0, 0, 0, 0, 0, 0, 0, &ftfx_fstat);
if (result != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
/* check if ram ready */
result = target_read_memory(bank->target, FTFx_FCNFG, 1, 1, buf);
if (result != ERROR_OK)
return result;
if (!(buf[0] & (1 << 1))) {
/* fallback to longword write */
fallback = 1;
LOG_WARNING("ram not ready, fallback to slow longword write (FCNFG: %02X)", buf[0]);
}
} else {
LOG_DEBUG("flash write into PFLASH @08%" PRIX32, offset);
result = kinetis_make_ram_ready(bank->target);
if (result != ERROR_OK) {
fallback = 1;
LOG_WARNING("FlexRAM not ready, fallback to slow longword write.");
}
}
LOG_DEBUG("flash write @08%" PRIX32, offset);
/* program section command */
if (fallback == 0) {