From ac94dbcb6779d184f89bde0f8e2c7368d7179dd8 Mon Sep 17 00:00:00 2001 From: Lee Jones Date: Thu, 20 Mar 2014 09:21:01 +0000 Subject: mtd: st_spi_fsm: Add the ability to read the FSM's status Acked-by Angus Clark Signed-off-by: Lee Jones Signed-off-by: Brian Norris --- drivers/mtd/devices/st_spi_fsm.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/mtd') diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 34aac3f49ba..5e315e31a83 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -793,6 +793,30 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm) 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) { struct stfsm_seq *seq = &stfsm_seq_wrvcr; -- cgit v1.2.3