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[23/47] mtd: nand: stm_nand_bch: erase one block (BCH)

Message ID 1398938214-17847-24-git-send-email-lee.jones@linaro.org
State New
Headers show

Commit Message

Lee Jones May 1, 2014, 9:56 a.m. UTC 
Adding a function which simply erases a single flash block.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mtd/nand/stm_nand_bch.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
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Patch

diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c
index 40767b8..6d7ab79 100644
--- a/drivers/mtd/nand/stm_nand_bch.c
+++ b/drivers/mtd/nand/stm_nand_bch.c
@@ -458,6 +458,33 @@  static void bch_wait_seq(struct nandi_controller *nandi)
 		dev_err(nandi->dev, "BCH Seq timeout\n");
 }
 
+static uint8_t bch_erase_block(struct nandi_controller *nandi,
+			       loff_t offs)
+{
+	struct bch_prog *prog = &bch_prog_erase_block;
+	uint8_t status;
+
+	dev_dbg(nandi->dev, "%s: offs = 0x%012llx\n", __func__, offs);
+
+	prog->extra = (uint32_t)(offs >> nandi->page_shift);
+
+	emiss_nandi_select(STM_NANDI_BCH);
+
+	nandi_enable_interrupts(nandi, NANDBCH_INT_SEQNODESOVER);
+	reinit_completion(&nandi->seq_completed);
+
+	bch_load_prog_cpu(nandi, prog);
+
+	bch_wait_seq(nandi);
+
+	nandi_disable_interrupts(nandi, NANDBCH_INT_SEQNODESOVER);
+
+	status = (uint8_t)(readl(nandi->base +
+				 NANDBCH_CHECK_STATUS_REG_A) & 0xff);
+
+	return status;
+}
+
 /*
  * Initialisation
  */