From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756016AbaEAJ6V (ORCPT ); Thu, 1 May 2014 05:58:21 -0400 Received: from mail-we0-f176.google.com ([74.125.82.176]:41396 "EHLO mail-we0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755977AbaEAJ6Q (ORCPT ); Thu, 1 May 2014 05:58:16 -0400 From: Lee Jones To: linux-kernel@vger.kernel.org Cc: computersforpeace@gmail.com, linux-mtd@lists.infradead.org, kernel@stlinux.com, Lee Jones 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> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1398938214-17847-1-git-send-email-lee.jones@linaro.org> References: <1398938214-17847-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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