linux-kernel - [PATCH 29/35] mtd: st_spi_fsm: Add the ability to read the FSM's status

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1392735362-1245-30-git-send-email-lee.jones@linaro.org>
Date:	Tue, 18 Feb 2014 14:55:56 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	lee.jones@...aro.org, DCG_UPD_stlinux_kernel@...t.st.com,
	dwmw2@...radead.org, linux-mtd@...ts.infradead.org,
	computersforpeace@...il.com, Angus.Clark@...com
Subject: [PATCH 29/35] mtd: st_spi_fsm: Add the ability to read the FSM's status

Acked-by Angus Clark <angus.clark@...com>
Signed-off-by: Lee Jones <lee.jones@...aro.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 a5e2c5a..5b2993d 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;
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/