[RFC 38/47] mtd: nand: stm_nand_bch: check WP (FLEX)

Lee Jones
2014-03-25T08:21:53Z

Return status of the Write Protect bit for the NAND device.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/nand/stm_nand_bch.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 3853e7a..18601e5 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -543,6 +543,22 @@ static void flex_addr(struct nandi_controller *nandi,
writel(addr, nandi->base + NANDHAM_FLEX_ADD);
}

+/*
+ * Hamming-FLEX operations (optimised replacements for nand_base.c versions)
+ */
+static int flex_check_wp(struct nandi_controller *nandi)
+{
+ uint8_t status;
+
+ emiss_nandi_select(STM_NANDI_HAMMING);
+
+ flex_cmd(nandi, NAND_CMD_STATUS);
+
+ status = (uint8_t)(readl(nandi->base + NANDHAM_FLEX_DATA) & 0xff);
+
+ return status & NAND_STATUS_WP ? 0 : 1;
+}
+
static int flex_read_raw(struct nandi_controller *nandi,
uint32_t page_addr,
uint32_t col_addr,
--
1.8.3.2