From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wi0-f177.google.com ([209.85.212.177]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wfnkv-0002s8-GJ for linux-mtd@lists.infradead.org; Thu, 01 May 2014 09:58:17 +0000 Received: by mail-wi0-f177.google.com with SMTP id cc10so403670wib.10 for ; Thu, 01 May 2014 02:57:55 -0700 (PDT) From: Lee Jones To: linux-kernel@vger.kernel.org Subject: [PATCH 23/47] mtd: nand: stm_nand_bch: erase one block (BCH) Date: Thu, 1 May 2014 10:56:30 +0100 Message-Id: <1398938214-17847-24-git-send-email-lee.jones@linaro.org> In-Reply-To: <1398938214-17847-1-git-send-email-lee.jones@linaro.org> References: <1398938214-17847-1-git-send-email-lee.jones@linaro.org> Cc: Lee Jones , computersforpeace@gmail.com, linux-mtd@lists.infradead.org, kernel@stlinux.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Adding a function which simply erases a single flash block. Signed-off-by: Lee Jones --- drivers/mtd/nand/stm_nand_bch.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) 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 */ -- 1.8.3.2