From: Pekon Gupta <pekon@ti.com>
To: Brian Norris <computersforpeace@gmail.com>
Cc: Stefan Roese <sr@denx.de>,
linux-mtd <linux-mtd@lists.infradead.org>,
Felipe Balbi <balbi@ti.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
Pekon Gupta <pekon@ti.com>
Subject: [PATCH v3 1/4] mtd: nand: omap: add support for BCH16_ECC - GPMC driver updates
Date: Mon, 24 Mar 2014 16:50:03 +0530 [thread overview]
Message-ID: <1395660006-27560-2-git-send-email-pekon@ti.com> (raw)
In-Reply-To: <1395660006-27560-1-git-send-email-pekon@ti.com>
This patch add support for BCH16_ECC in GPMC (controller) driver:
- extend configuration space to include BCH16 registers
- extend parsing of DT binding for selecting BCH16 ecc-scheme
Signed-off-by: Pekon Gupta <pekon@ti.com>
---
arch/arm/mach-omap2/gpmc.c | 15 +++++++++++++++
include/linux/platform_data/mtd-nand-omap2.h | 5 +++++
2 files changed, 20 insertions(+)
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index ab43755..9b27773 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -68,6 +68,9 @@
#define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */
#define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */
#define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */
+#define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */
/* GPMC ECC control settings */
#define GPMC_ECC_CTRL_ECCCLEAR 0x100
@@ -666,6 +669,12 @@ void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
GPMC_BCH_SIZE * i;
reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 +
GPMC_BCH_SIZE * i;
+ reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 +
+ i * GPMC_BCH_SIZE;
+ reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 +
+ i * GPMC_BCH_SIZE;
+ reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 +
+ i * GPMC_BCH_SIZE;
}
}
@@ -1401,6 +1410,12 @@ static int gpmc_probe_nand_child(struct platform_device *pdev,
else
gpmc_nand_data->ecc_opt =
OMAP_ECC_BCH8_CODE_HW_DETECTION_SW;
+ else if (!strcmp(s, "bch16"))
+ if (gpmc_nand_data->elm_of_node)
+ gpmc_nand_data->ecc_opt =
+ OMAP_ECC_BCH16_CODE_HW;
+ else
+ pr_err("%s: BCH16 requires ELM support\n", __func__);
else
pr_err("%s: ti,nand-ecc-opt invalid value\n", __func__);
diff --git a/include/linux/platform_data/mtd-nand-omap2.h b/include/linux/platform_data/mtd-nand-omap2.h
index 3e9dd66..c2172e8 100644
--- a/include/linux/platform_data/mtd-nand-omap2.h
+++ b/include/linux/platform_data/mtd-nand-omap2.h
@@ -31,6 +31,8 @@ enum omap_ecc {
OMAP_ECC_BCH8_CODE_HW_DETECTION_SW,
/* 8-bit ECC calculation by GPMC, Error detection by ELM */
OMAP_ECC_BCH8_CODE_HW,
+ /* 16-bit ECC calculation by GPMC, Error detection by ELM */
+ OMAP_ECC_BCH16_CODE_HW
};
struct gpmc_nand_regs {
@@ -50,6 +52,9 @@ struct gpmc_nand_regs {
void __iomem *gpmc_bch_result1[GPMC_BCH_NUM_REMAINDER];
void __iomem *gpmc_bch_result2[GPMC_BCH_NUM_REMAINDER];
void __iomem *gpmc_bch_result3[GPMC_BCH_NUM_REMAINDER];
+ void __iomem *gpmc_bch_result4[GPMC_BCH_NUM_REMAINDER];
+ void __iomem *gpmc_bch_result5[GPMC_BCH_NUM_REMAINDER];
+ void __iomem *gpmc_bch_result6[GPMC_BCH_NUM_REMAINDER];
};
struct omap_nand_platform_data {
--
1.8.5.1.163.gd7aced9
next prev parent reply other threads:[~2014-03-24 11:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-24 11:20 [PATCH v3 0/4] mtd: nand: omap: add support for BCH16_ECC Pekon Gupta
2014-03-24 11:20 ` Pekon Gupta [this message]
2014-03-24 11:20 ` [PATCH v3 2/4] mtd: nand: omap: add support for BCH16_ECC - ELM driver updates Pekon Gupta
2014-03-24 11:20 ` [PATCH v3 3/4] mtd: nand: omap: add support for BCH16_ECC - NAND " Pekon Gupta
2014-03-24 11:20 ` [PATCH v3 4/4] mtd: nand: omap: Documentation: How to select correct ECC scheme for your device ? Pekon Gupta
2014-04-28 5:08 ` [PATCH v3 0/4] mtd: nand: omap: add support for BCH16_ECC Gupta, Pekon
2014-05-06 4:21 ` Gupta, Pekon
2014-05-09 8:59 Pekon Gupta
2014-05-09 8:59 ` [PATCH v3 1/4] mtd: nand: omap: add support for BCH16_ECC - GPMC driver updates Pekon Gupta
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