openwrt-xburst/target/linux/lantiq/patches/210-nor.patch

--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -260,6 +260,12 @@
 	  Support for parsing CFE image tag and creating MTD partitions on
 	  Broadcom BCM63xx boards.
 
+config MTD_LANTIQ
+	bool "Lantiq SoC NOR support"
+	depends on LANTIQ && MTD_PARTITIONS
+	help
+	  Support for NOR flsh chips on Lantiq SoC
+
 config MTD_DILNETPC
 	tristate "CFI Flash device mapped on DIL/Net PC"
 	depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -59,3 +59,4 @@
 obj-$(CONFIG_MTD_VMU)		+= vmu-flash.o
 obj-$(CONFIG_MTD_GPIO_ADDR)	+= gpio-addr-flash.o
 obj-$(CONFIG_MTD_BCM963XX)	+= bcm963xx-flash.o
+obj-$(CONFIG_MTD_LANTIQ)	+= lantiq.o
--- /dev/null
+++ b/drivers/mtd/maps/lantiq.c
@@ -0,0 +1,183 @@
+/*
+ *  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) 2004 Liu Peng Infineon IFAP DC COM CPE
+ *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/cfi.h>
+#include <linux/magic.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/cfi.h>
+
+#include <lantiq.h>
+#include <lantiq_platform.h>
+
+#ifdef CONFIG_SOC_LANTIQ_XWAY
+#include <xway.h>
+#endif
+static int ltq_mtd_probing;
+
+static map_word
+lq_read16(struct map_info *map, unsigned long adr)
+{
+	unsigned long flags;
+	map_word temp;
+	spin_lock_irqsave(&ebu_lock, flags);
+	if (ltq_mtd_probing)
+		adr ^= 2;
+	temp.x[0] = *((__u16 *)(map->virt + adr));
+	spin_unlock_irqrestore(&ebu_lock, flags);
+	return temp;
+}
+
+static void
+lq_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
+	if (ltq_mtd_probing)
+		adr ^= 2;
+	*((__u16 *)(map->virt + adr)) = d.x[0];
+	spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+void
+lq_copy_from(struct map_info *map, void *to,
+	unsigned long from, ssize_t len)
+{
+	unsigned char *p;
+	unsigned char *to_8;
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
+	from = (unsigned long)(from + map->virt);
+	p = (unsigned char *) from;
+	to_8 = (unsigned char *) to;
+	while (len--)
+		*to_8++ = *p++;
+	spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+void
+lq_copy_to(struct map_info *map, unsigned long to,
+	const void *from, ssize_t len)
+{
+	unsigned char *p =  (unsigned char *)from;
+	unsigned char *to_8;
+	unsigned long flags;
+	spin_lock_irqsave(&ebu_lock, flags);
+	to += (unsigned long) map->virt;
+	to_8 = (unsigned char *)to;
+	while (len--)
+		*p++ = *to_8++;
+	spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+static const char *part_probe_types[] = { "cmdlinepart", NULL };
+
+static struct map_info lq_map = {
+	.name = "lq_nor",
+	.bankwidth = 2,
+	.read = lq_read16,
+	.write = lq_write16,
+	.copy_from = lq_copy_from,
+	.copy_to = lq_copy_to,
+};
+
+static int
+lq_mtd_probe(struct platform_device *pdev)
+{
+	struct physmap_flash_data *lq_mtd_data =
+		(struct physmap_flash_data*) dev_get_platdata(&pdev->dev);
+	struct mtd_info *lq_mtd = NULL;
+	struct mtd_partition *parts = NULL;
+	struct resource *res = 0;
+	int nr_parts = 0;
+	struct cfi_private *cfi;
+
+#ifdef CONFIG_SOC_LANTIQ_XWAY
+	lq_w32(lq_r32(LQ_EBU_BUSCON0) & ~EBU_WRDIS, LQ_EBU_BUSCON0);
+#endif
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if(!res)
+	{
+		dev_err(&pdev->dev, "failed to get memory resource");
+		return -ENOENT;
+	}
+	res = request_mem_region(res->start, resource_size(res),
+		dev_name(&pdev->dev));
+	if(!res)
+	{
+		dev_err(&pdev->dev, "failed to request mem resource");
+		return -EBUSY;
+	}
+
+	lq_map.phys = res->start;
+	lq_map.size = resource_size(res);
+	lq_map.virt = ioremap_nocache(lq_map.phys, lq_map.size);
+
+	if (!lq_map.virt ) {
+		dev_err(&pdev->dev, "failed to ioremap!\n");
+		return -EIO;
+	}
+
+	ltq_mtd_probing = 1;
+	lq_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &lq_map);
+	ltq_mtd_probing = 0;
+	if (!lq_mtd) {
+		iounmap(lq_map.virt);
+		dev_err(&pdev->dev, "probing failed\n");
+		return -ENXIO;
+	}
+
+	lq_mtd->owner = THIS_MODULE;
+	cfi = lq_map.fldrv_priv;
+	cfi->addr_unlock1 ^= 1;
+	cfi->addr_unlock2 ^= 1;
+
+	nr_parts = parse_mtd_partitions(lq_mtd, part_probe_types, &parts, 0);
+	if (nr_parts > 0) {
+		dev_info(&pdev->dev, "using %d partitions from cmdline", nr_parts);
+	} else {
+		nr_parts = lq_mtd_data->nr_parts;
+		parts = lq_mtd_data->parts;
+	}
+
+	add_mtd_partitions(lq_mtd, parts, nr_parts);
+	return 0;
+}
+
+static struct platform_driver lq_mtd_driver = {
+	.probe = lq_mtd_probe,
+	.driver = {
+		.name = "lq_nor",
+		.owner = THIS_MODULE,
+	},
+};
+
+int __init
+init_lq_mtd(void)
+{
+	int ret = platform_driver_register(&lq_mtd_driver);
+	if (ret)
+		printk(KERN_INFO "lq_nor: error registering platfom driver");
+	return ret;
+}
+
+module_init(init_lq_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("Lantiq SoC NOR");