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| author | Lee Jones <lee.jones@linaro.org> | 2014-03-20 13:21:02 +0400 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-03-20 15:17:20 +0400 |
| commit | 150571b74ad92485b1443d0802dc740e194883f1 (patch) | |
| tree | 4baa6bea29daf8b607707e9602d29418cccb2c25 /drivers/mtd | |
| parent | ac94dbcb6779d184f89bde0f8e2c7368d7179dd8 (diff) | |
| download | linux-150571b74ad92485b1443d0802dc740e194883f1.tar.xz | |
mtd: st_spi_fsm: Add the ability to write to FSM's status register
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>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/devices/st_spi_fsm.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c index 5e315e31a839..0eb2c09dd004 100644 --- a/drivers/mtd/devices/st_spi_fsm.c +++ b/drivers/mtd/devices/st_spi_fsm.c @@ -588,6 +588,23 @@ static struct stfsm_seq stfsm_seq_erase_chip = { SEQ_CFG_STARTSEQ), }; +static struct stfsm_seq stfsm_seq_write_status = { + .seq_opc[0] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) | + SEQ_OPC_OPCODE(FLASH_CMD_WREN) | SEQ_OPC_CSDEASSERT), + .seq_opc[1] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) | + SEQ_OPC_OPCODE(FLASH_CMD_WRSR)), + .seq = { + STFSM_INST_CMD1, + STFSM_INST_CMD2, + STFSM_INST_STA_WR1, + STFSM_INST_STOP, + }, + .seq_cfg = (SEQ_CFG_PADS_1 | + SEQ_CFG_READNOTWRITE | + SEQ_CFG_CSDEASSERT | + SEQ_CFG_STARTSEQ), +}; + static struct stfsm_seq stfsm_seq_wrvcr = { .seq_opc[0] = (SEQ_OPC_PADS_1 | SEQ_OPC_CYCLES(8) | SEQ_OPC_OPCODE(FLASH_CMD_WREN) | SEQ_OPC_CSDEASSERT), @@ -817,6 +834,25 @@ static int stfsm_read_status(struct stfsm *fsm, uint8_t cmd, return 0; } +static int stfsm_write_status(struct stfsm *fsm, uint16_t status, + int sta_bytes) +{ + struct stfsm_seq *seq = &stfsm_seq_write_status; + + dev_dbg(fsm->dev, "writing STA[%s] 0x%04x\n", + (sta_bytes == 1) ? "1" : "1+2", status); + + seq->status = (uint32_t)status | STA_PADS_1 | STA_CSDEASSERT; + seq->seq[2] = (sta_bytes == 1) ? + STFSM_INST_STA_WR1 : STFSM_INST_STA_WR1_2; + + stfsm_load_seq(fsm, seq); + + stfsm_wait_seq(fsm); + + return 0; +}; + static int stfsm_wrvcr(struct stfsm *fsm, uint8_t data) { struct stfsm_seq *seq = &stfsm_seq_wrvcr; |