From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wi0-f171.google.com ([209.85.212.171]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WfnlE-0003MG-Pp for linux-mtd@lists.infradead.org; Thu, 01 May 2014 09:58:37 +0000 Received: by mail-wi0-f171.google.com with SMTP id hm4so409035wib.10 for ; Thu, 01 May 2014 02:58:15 -0700 (PDT) From: Lee Jones To: linux-kernel@vger.kernel.org Subject: [PATCH 33/47] mtd: nand: stm_nand_bch: read and write raw (FLEX) Date: Thu, 1 May 2014 10:56:40 +0100 Message-Id: <1398938214-17847-34-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: , Once the correct READ/WRITE(SEQIN) commands and address locations have been sent to the Controller, these calls are able to read/write the requested information from the FLEX_DATA register. Signed-off-by: Lee Jones --- drivers/mtd/nand/stm_nand_bch.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/mtd/nand/stm_nand_bch.c b/drivers/mtd/nand/stm_nand_bch.c index aba4bc5..32d2211 100644 --- a/drivers/mtd/nand/stm_nand_bch.c +++ b/drivers/mtd/nand/stm_nand_bch.c @@ -754,6 +754,41 @@ static void flex_addr(struct nandi_controller *nandi, writel(addr, nandi->base + NANDHAM_FLEX_ADD); } +static int flex_read_raw(struct nandi_controller *nandi, + uint32_t page_addr, + uint32_t col_addr, + uint8_t *buf, uint32_t len) +{ + dev_dbg(nandi->dev, "%s %u bytes at [0x%06x,0x%04x]\n", + __func__, len, page_addr, col_addr); + + BUG_ON(len & 0x3); + BUG_ON((unsigned long)buf & 0x3); + + emiss_nandi_select(STM_NANDI_HAMMING); + nandi_enable_interrupts(nandi, NAND_INT_RBN); + reinit_completion(&nandi->rbn_completed); + + writel(FLEX_DATA_CFG_BEATS_4 | FLEX_DATA_CFG_CSN, + nandi->base + NANDHAM_FLEX_DATAREAD_CONFIG); + + flex_cmd(nandi, NAND_CMD_READ0); + flex_addr(nandi, col_addr, 2); + flex_addr(nandi, page_addr, nandi->extra_addr ? 3 : 2); + flex_cmd(nandi, NAND_CMD_READSTART); + + flex_wait_rbn(nandi); + + readsl(nandi->base + NANDHAM_FLEX_DATA, buf, len / 4); + + nandi_disable_interrupts(nandi, NAND_INT_RBN); + + writel(FLEX_DATA_CFG_BEATS_1 | FLEX_DATA_CFG_CSN, + nandi->base + NANDHAM_FLEX_DATAREAD_CONFIG); + + return 0; +} + /* * Bad Block Tables/Bad Block Markers */ -- 1.8.3.2