diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.9/0013-MTD-lantiq-Add-NAND-support-on-Lantiq-Falcon-SoC.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.9/0013-MTD-lantiq-Add-NAND-support-on-Lantiq-Falcon-SoC.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.9/0013-MTD-lantiq-Add-NAND-support-on-Lantiq-Falcon-SoC.patch b/target/linux/lantiq/patches-3.9/0013-MTD-lantiq-Add-NAND-support-on-Lantiq-Falcon-SoC.patch new file mode 100644 index 0000000..2651ea6 --- /dev/null +++ b/target/linux/lantiq/patches-3.9/0013-MTD-lantiq-Add-NAND-support-on-Lantiq-Falcon-SoC.patch @@ -0,0 +1,138 @@ +From 6bfb122580ccf67b82abf6c5fe2ae1e770812f0d Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Wed, 30 Jan 2013 21:12:47 +0100 +Subject: [PATCH 13/22] MTD: lantiq: Add NAND support on Lantiq Falcon SoC. + +The driver uses plat_nand. As the platform_device is loaded from DT, we need +to lookup the node and attach our falcon specific "struct platform_nand_data" +to it. + +Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + drivers/mtd/nand/Kconfig | 8 ++++ + drivers/mtd/nand/Makefile | 1 + + drivers/mtd/nand/falcon_nand.c | 83 ++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 92 insertions(+) + create mode 100644 drivers/mtd/nand/falcon_nand.c + +diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig +index 81bf5e5..2738097 100644 +--- a/drivers/mtd/nand/Kconfig ++++ b/drivers/mtd/nand/Kconfig +@@ -574,4 +574,12 @@ config MTD_NAND_XWAY + Enables support for NAND Flash chips on Lantiq XWAY SoCs. NAND is attached + to the External Bus Unit (EBU). + ++config MTD_NAND_FALCON ++ tristate "Support for NAND on Lantiq FALC-ON SoC" ++ depends on LANTIQ && SOC_FALCON ++ select MTD_NAND_PLATFORM ++ help ++ Enables support for NAND Flash chips on Lantiq FALC-ON SoCs. NAND is ++ attached to the External Bus Unit (EBU). ++ + endif # MTD_NAND +diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile +index d76d912..1a61bf0 100644 +--- a/drivers/mtd/nand/Makefile ++++ b/drivers/mtd/nand/Makefile +@@ -53,5 +53,6 @@ obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o + obj-$(CONFIG_MTD_NAND_GPMI_NAND) += gpmi-nand/ + obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o + obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/ ++obj-$(CONFIG_MTD_NAND_FALCON) += falcon_nand.o + + nand-objs := nand_base.o nand_bbt.o +diff --git a/drivers/mtd/nand/falcon_nand.c b/drivers/mtd/nand/falcon_nand.c +new file mode 100644 +index 0000000..13458d3 +--- /dev/null ++++ b/drivers/mtd/nand/falcon_nand.c +@@ -0,0 +1,83 @@ ++/* ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ * ++ * Copyright (C) 2011 Thomas Langer <thomas.langer@lantiq.com> ++ * Copyright (C) 2011 John Crispin <blogic@openwrt.org> ++ */ ++ ++#include <linux/mtd/nand.h> ++#include <linux/of_platform.h> ++ ++#include <lantiq_soc.h> ++ ++/* address lines used for NAND control signals */ ++#define NAND_ADDR_ALE 0x10000 ++#define NAND_ADDR_CLE 0x20000 ++ ++/* Ready/Busy Status */ ++#define MODCON_STS 0x0002 ++ ++/* Ready/Busy Status Edge */ ++#define MODCON_STSEDGE 0x0004 ++#define LTQ_EBU_MODCON 0x000C ++ ++static const char const *part_probes[] = { "cmdlinepart", "ofpart", NULL }; ++ ++static int falcon_nand_ready(struct mtd_info *mtd) ++{ ++ u32 modcon = ltq_ebu_r32(LTQ_EBU_MODCON); ++ ++ return (((modcon & (MODCON_STS | MODCON_STSEDGE)) == ++ (MODCON_STS | MODCON_STSEDGE))); ++} ++ ++static void falcon_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) ++{ ++ struct nand_chip *this = mtd->priv; ++ unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; ++ ++ if (ctrl & NAND_CTRL_CHANGE) { ++ nandaddr &= ~(NAND_ADDR_ALE | NAND_ADDR_CLE); ++ ++ if (ctrl & NAND_CLE) ++ nandaddr |= NAND_ADDR_CLE; ++ if (ctrl & NAND_ALE) ++ nandaddr |= NAND_ADDR_ALE; ++ ++ this->IO_ADDR_W = (void __iomem *) nandaddr; ++ } ++ ++ if (cmd != NAND_CMD_NONE) ++ writeb(cmd, this->IO_ADDR_W); ++} ++ ++static struct platform_nand_data falcon_nand_data = { ++ .chip = { ++ .nr_chips = 1, ++ .chip_delay = 25, ++ .part_probe_types = part_probes, ++ }, ++ .ctrl = { ++ .cmd_ctrl = falcon_hwcontrol, ++ .dev_ready = falcon_nand_ready, ++ } ++}; ++ ++int __init falcon_register_nand(void) ++{ ++ struct device_node *node; ++ struct platform_device *pdev; ++ ++ node = of_find_compatible_node(NULL, NULL, "lantiq,nand-falcon"); ++ if (!node) ++ return -1; ++ pdev = of_find_device_by_node(node); ++ if (pdev) ++ pdev->dev.platform_data = &falcon_nand_data; ++ of_node_put(node); ++ return 0; ++} ++ ++arch_initcall(falcon_register_nand); +-- +1.7.10.4 + |