292 lines
8.3 KiB
Diff
292 lines
8.3 KiB
Diff
Index: linux-2.6.30.8/drivers/mtd/maps/Makefile
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===================================================================
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--- linux-2.6.30.8.orig/drivers/mtd/maps/Makefile 2009-09-24 17:28:02.000000000 +0200
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+++ linux-2.6.30.8/drivers/mtd/maps/Makefile 2009-10-19 21:31:32.000000000 +0200
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@@ -62,3 +62,4 @@
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obj-$(CONFIG_MTD_BFIN_ASYNC) += bfin-async-flash.o
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obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o
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obj-$(CONFIG_MTD_VMU) += vmu-flash.o
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+obj-$(CONFIG_MTD_IFXMIPS) += ifxmips.o
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Index: linux-2.6.30.8/drivers/mtd/maps/ifxmips.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ linux-2.6.30.8/drivers/mtd/maps/ifxmips.c 2009-10-19 21:40:44.000000000 +0200
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@@ -0,0 +1,277 @@
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+/*
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ *
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+ * Copyright (C) 2004 Liu Peng Infineon IFAP DC COM CPE
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+ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <linux/io.h>
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+#include <linux/init.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#include <linux/mtd/partitions.h>
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+#include <linux/mtd/cfi.h>
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+#include <linux/magic.h>
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+#include <linux/platform_device.h>
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+
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+#include <ifxmips.h>
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+#include <ifxmips_prom.h>
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+#include <ifxmips_ebu.h>
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+
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+#ifndef CONFIG_MTD_PARTITIONS
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+#error Please enable CONFIG_MTD_PARTITIONS
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+#endif
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+
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+static struct map_info ifxmips_map = {
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+ .name = "ifx-nor",
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+ .bankwidth = 2,
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+ .size = 0x400000,
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+};
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+
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+static map_word ifxmips_read16(struct map_info *map, unsigned long adr)
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+{
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+ unsigned long flags;
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+ map_word temp;
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+ spin_lock_irqsave(&ebu_lock, flags);
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+ adr ^= 2;
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+ temp.x[0] = *((__u16 *)(map->virt + adr));
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+ spin_unlock_irqrestore(&ebu_lock, flags);
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+ return temp;
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+}
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+
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+static void ifxmips_write16(struct map_info *map, map_word d, unsigned long adr)
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+{
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+ unsigned long flags;
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+ spin_lock_irqsave(&ebu_lock, flags);
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+ adr ^= 2;
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+ *((__u16 *)(map->virt + adr)) = d.x[0];
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+ spin_unlock_irqrestore(&ebu_lock, flags);
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+}
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+
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+void ifxmips_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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+{
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+ unsigned char *p;
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+ unsigned char *to_8;
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+ unsigned long flags;
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+ spin_lock_irqsave(&ebu_lock, flags);
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+ from = (unsigned long)(from + map->virt);
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+ p = (unsigned char *) from;
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+ to_8 = (unsigned char *) to;
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+ while (len--)
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+ *to_8++ = *p++;
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+ spin_unlock_irqrestore(&ebu_lock, flags);
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+}
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+
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+void ifxmips_copy_to(struct map_info *map,
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+ unsigned long to,
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+ const void *from,
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+ ssize_t len)
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+{
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+ unsigned char *p = (unsigned char *)from;
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+ unsigned char *to_8;
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+ unsigned long flags;
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+ spin_lock_irqsave(&ebu_lock, flags);
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+ to += (unsigned long) map->virt;
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+ to_8 = (unsigned char *)to;
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+ while (len--)
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+ *p++ = *to_8++;
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+ spin_unlock_irqrestore(&ebu_lock, flags);
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+}
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+
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+static struct mtd_partition ifxmips_partitions[] = {
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+ {
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+ .name = "uboot",
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+ .offset = 0x00000000,
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+ .size = 0x00020000,
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+ },
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+ {
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+ .name = "uboot_env",
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+ .offset = 0x00020000,
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+ .size = 0x00010000,
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+ },
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+ {
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+ .name = "kernel",
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+ .offset = 0x00030000,
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+ .size = 0x0,
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+ },
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+ {
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+ .name = "rootfs",
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+ .offset = 0x0,
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+ .size = 0x0,
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+ },
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+ {
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+ .name = "board_config",
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+ .offset = 0x0,
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+ .size = 0x0,
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+ },
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+};
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+
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+static struct mtd_partition ifxmips_meta_partition = {
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+ .name = "linux",
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+ .offset = 0x00030000,
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+ .size = 0x0,
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+};
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+
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+static const char *part_probe_types[] = { "cmdlinepart", NULL };
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+
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+int find_uImage_size(unsigned long start_offset)
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+{
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+ unsigned long magic;
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+ unsigned long temp;
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+ ifxmips_copy_from(&ifxmips_map, &magic, start_offset, 4);
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+ if (le32_to_cpu(magic) != 0x56190527) {
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+ printk(KERN_INFO "ifxmips_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", le32_to_cpu(magic), start_offset);
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+ return 0;
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+ }
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+ ifxmips_copy_from(&ifxmips_map, &temp, start_offset + 12, 4);
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+ printk(KERN_INFO "ifxmips_mtd: kernel size is %ld \n", temp + 0x40);
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+ return temp + 0x40;
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+}
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+
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+int find_brn_block(unsigned long start_offset)
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+{
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+ unsigned char temp[9];
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+ ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 8);
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+ temp[8] = '\0';
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+ printk(KERN_INFO "data in brn block %s\n", temp);
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+ if (memcmp(temp, "BRN-BOOT", 8) == 0)
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+ return 1;
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+ else
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+ return 0;
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+}
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+
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+int detect_squashfs_partition(unsigned long start_offset)
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+{
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+ unsigned long temp;
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+ ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 4);
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+ return le32_to_cpu(temp) == SQUASHFS_MAGIC;
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+}
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+
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+static int ifxmips_mtd_probe(struct platform_device *dev)
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+{
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+ struct mtd_info *ifxmips_mtd = NULL;
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+ struct mtd_partition *parts = NULL;
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+ unsigned long uimage_size;
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+ int err, i;
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+ int kernel_part = 2, rootfs_part = 3;
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+ int num_parts = ARRAY_SIZE(ifxmips_partitions);
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+
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+ ifxmips_w32(0x1d7ff, IFXMIPS_EBU_BUSCON0);
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+
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+ ifxmips_map.read = ifxmips_read16;
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+ ifxmips_map.write = ifxmips_write16;
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+ ifxmips_map.copy_from = ifxmips_copy_from;
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+ ifxmips_map.copy_to = ifxmips_copy_to;
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+ ifxmips_map.phys = dev->resource->start;
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+ ifxmips_map.size = dev->resource->end - ifxmips_map.phys + 1;
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+ ifxmips_map.virt = ioremap_nocache(ifxmips_map.phys, ifxmips_map.size);
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+
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+ if (!ifxmips_map.virt) {
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+ printk(KERN_WARNING "ifxmips_mtd: failed to ioremap!\n");
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+ return -EIO;
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+ }
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+
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+ ifxmips_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &ifxmips_map);
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+ if (!ifxmips_mtd) {
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+ iounmap(ifxmips_map.virt);
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+ printk(KERN_WARNING "ifxmips_mtd: probing failed\n");
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+ return -ENXIO;
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+ }
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+
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+ ifxmips_mtd->owner = THIS_MODULE;
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+
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+ err = parse_mtd_partitions(ifxmips_mtd, part_probe_types, &parts, 0);
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+ if (err > 0) {
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+ printk(KERN_INFO "ifxmips_mtd: found %d partitions from cmdline\n", err);
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+ num_parts = err;
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+ kernel_part = 0;
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+ rootfs_part = 0;
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+ for (i = 0; i < num_parts; i++) {
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+ if (strcmp(parts[i].name, "kernel") == 0)
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+ kernel_part = i;
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+ if (strcmp(parts[i].name, "rootfs") == 0)
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+ rootfs_part = i;
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+ }
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+ } else {
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+ parts = &ifxmips_partitions[0];
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+ }
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+
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+ /* dynamic size detection only if rootfs-part follows kernel-part */
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+ if (kernel_part+1 == rootfs_part) {
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+ uimage_size = find_uImage_size(parts[kernel_part].offset);
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+
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+ if (detect_squashfs_partition(parts[kernel_part].offset + uimage_size)) {
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+ printk(KERN_INFO "ifxmips_mtd: found a squashfs following the uImage\n");
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+ } else {
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+ uimage_size &= ~0xffff;
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+ uimage_size += 0x10000;
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+ }
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+
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+ parts[kernel_part].size = uimage_size;
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+ parts[rootfs_part].offset = parts[kernel_part].offset + parts[kernel_part].size;
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+ parts[rootfs_part].size = ((ifxmips_mtd->size >> 20) * 1024 * 1024) - parts[rootfs_part].offset;
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+
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+ ifxmips_meta_partition.offset = parts[kernel_part].offset;
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+ ifxmips_meta_partition.size = parts[kernel_part].size + parts[rootfs_part].size;
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+ }
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+
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+ if (err <= 0) {
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+ if (ifxmips_has_brn_block()) {
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+ parts[3].size -= ifxmips_mtd->erasesize;
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+ parts[4].offset = ifxmips_mtd->size - ifxmips_mtd->erasesize;
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+ parts[4].size = ifxmips_mtd->erasesize;
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+ } else {
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+ num_parts--;
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+ }
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+ }
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+
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+ add_mtd_partitions(ifxmips_mtd, parts, num_parts);
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+ add_mtd_partitions(ifxmips_mtd, &ifxmips_meta_partition, 1);
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+
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+ printk(KERN_INFO "ifxmips_mtd: added %s flash with %dMB\n",
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+ ifxmips_map.name, ((int)ifxmips_mtd->size) >> 20);
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+ return 0;
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+}
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+
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+static struct platform_driver ifxmips_mtd_driver = {
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+ .probe = ifxmips_mtd_probe,
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+ .driver = {
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+ .name = "ifxmips_mtd",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+int __init init_ifxmips_mtd(void)
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+{
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+ int ret = platform_driver_register(&ifxmips_mtd_driver);
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+ if (ret)
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+ printk(KERN_INFO "ifxmips_mtd: error registering platfom driver!");
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+ return ret;
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+}
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+
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+static void __exit cleanup_ifxmips_mtd(void)
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+{
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+ platform_driver_unregister(&ifxmips_mtd_driver);
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+}
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+
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+module_init(init_ifxmips_mtd);
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+module_exit(cleanup_ifxmips_mtd);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
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+MODULE_DESCRIPTION("MTD map driver for IFXMIPS boards");
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