[PATCH v3 31/36] mtd: st_spi_fsm: Add the ability to read the FSM's status

Lee Jones
2013-11-29T12:21:51Z

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/devices/st_spi_fsm.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index ecb001d..1d6bd94 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -365,6 +365,30 @@ static uint8_t stfsm_wait_busy(struct stfsm *fsm)
return -EIO;
}

+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;
--
1.8.3.2