From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wm0-x22f.google.com ([2a00:1450:400c:c09::22f]) by merlin.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1ZzrUG-0000IE-4b for barebox@lists.infradead.org; Fri, 20 Nov 2015 19:36:49 +0000 Received: by wmvv187 with SMTP id v187so86249975wmv.1 for ; Fri, 20 Nov 2015 11:36:26 -0800 (PST) From: Sebastian Hesselbarth Date: Fri, 20 Nov 2015 20:36:08 +0100 Message-Id: <1448048172-10080-16-git-send-email-sebastian.hesselbarth@gmail.com> In-Reply-To: <1448048172-10080-1-git-send-email-sebastian.hesselbarth@gmail.com> References: <1448048172-10080-1-git-send-email-sebastian.hesselbarth@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 15/19] mtd: nand_mrvl_nfc: Add support for 8bit BCH HW ECC To: Sebastian Hesselbarth , barebox@lists.infradead.org Cc: Thomas Petazzoni , Ezequiel Garcia Add support for 8bit HW ECC modes supported by later IP versions. Signed-off-by: Sebastian Hesselbarth Tested-by: Robert Jarzmik --- drivers/mtd/nand/nand_mrvl_nfc.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/mtd/nand/nand_mrvl_nfc.c b/drivers/mtd/nand/nand_mrvl_nfc.c index 3e9fccdffefe..f43200dcf2c7 100644 --- a/drivers/mtd/nand/nand_mrvl_nfc.c +++ b/drivers/mtd/nand/nand_mrvl_nfc.c @@ -252,6 +252,17 @@ static struct nand_ecclayout ecc_layout_4KB_bch4bit = { .oobfree = { {1, 4}, {6, 26}, {64, 32} } }; +static struct nand_ecclayout ecc_layout_4KB_bch8bit = { + .eccbytes = 64, + .eccpos = { + 32, 33, 34, 35, 36, 37, 38, 39, + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63}, + /* Bootrom looks in bytes 0 & 5 for bad blocks */ + .oobfree = { {1, 4}, {6, 26} } +}; + #define NDTR0_tCH(c) (min((c), 7) << 19) #define NDTR0_tCS(c) (min((c), 7) << 16) #define NDTR0_tWH(c) (min((c), 7) << 11) @@ -928,6 +939,31 @@ static int pxa_ecc_strength4(struct mrvl_nand_host *host, return -ENODEV; } +static int pxa_ecc_strength8(struct mrvl_nand_host *host, + struct nand_ecc_ctrl *ecc, int ecc_stepsize, int page_size) +{ + if (!(host->hwflags & HWFLAGS_ECC_BCH)) + return -ENODEV; + + /* + * Required ECC: 8-bit correction per 512 bytes + * Select: 16-bit correction per 1024 bytes + */ + if (ecc_stepsize == 512 && page_size == 4096) { + host->chunk_size = 1024; + host->spare_size = 0; + host->ecc_size = 32; + host->ecc_bch = 1; + ecc->mode = NAND_ECC_HW; + ecc->size = 1024; + ecc->layout = &ecc_layout_4KB_bch8bit; + ecc->strength = 16; + return 0; + } + + return -ENODEV; +} + static int pxa_ecc_init(struct mrvl_nand_host *host, struct nand_ecc_ctrl *ecc, int strength, int ecc_stepsize, int page_size) @@ -941,6 +977,9 @@ static int pxa_ecc_init(struct mrvl_nand_host *host, case 4: ret = pxa_ecc_strength4(host, ecc, ecc_stepsize, page_size); break; + case 8: + ret = pxa_ecc_strength8(host, ecc, ecc_stepsize, page_size); + break; } if (ret) { -- 2.1.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox