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mtd: st_spi_fsm: Add the ability to read the FSM's status 

Acked-by Angus Clark <angus.clark@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Lee Jones 2014-03-20 09:21:01 +00:00 committed by Brian Norris
parent 4a341fe758
commit ac94dbcb67
1 changed files with 24 additions and 0 deletions
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24
drivers/mtd/devices/st_spi_fsm.c
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@ -793,6 +793,30 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm)
return FLASH_STATUS_TIMEOUT; return FLASH_STATUS_TIMEOUT;
} }
static int stfsm_read_status(struct stfsm *fsm, uint8_t cmd,
uint8_t *status)
{
struct stfsm_seq *seq = &stfsm_seq_read_status_fifo;
uint32_t tmp;
dev_dbg(fsm->dev, "reading STA[%s]\n",
(cmd == FLASH_CMD_RDSR) ? "1" : "2");
seq->seq_opc[0] = (SEQ_OPC_PADS_1 |
SEQ_OPC_CYCLES(8) |
SEQ_OPC_OPCODE(cmd)),
stfsm_load_seq(fsm, seq);
stfsm_read_fifo(fsm, &tmp, 4);
*status = (uint8_t)(tmp >> 24);
stfsm_wait_seq(fsm);
return 0;
}
static int stfsm_wrvcr(struct stfsm *fsm, uint8_t data) static int stfsm_wrvcr(struct stfsm *fsm, uint8_t data)
{ {
struct stfsm_seq *seq = &stfsm_seq_wrvcr; struct stfsm_seq *seq = &stfsm_seq_wrvcr;