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-rw-r--r--target/linux/amazon/files/drivers/mtd/maps/amazon.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/target/linux/amazon/files/drivers/mtd/maps/amazon.c b/target/linux/amazon/files/drivers/mtd/maps/amazon.c
new file mode 100644
index 0000000000..3e7dc4f583
--- /dev/null
+++ b/target/linux/amazon/files/drivers/mtd/maps/amazon.c
@@ -0,0 +1,166 @@
+/*
+ * Handle mapping of the flash memory access routines
+ * on Amazon based devices.
+ *
+ * Copyright(C) 2004 peng.liu@infineon.com
+ *
+ * This code is GPLed
+ *
+ */
+// 000005:fchang 2005/6/2 Modified by Bingtao to double check if the EBU is enabled/disabled
+// 506231:tc.chen 2005/06/23 increase firmware partition size form 192KB to 256KB
+// 050701:linmars 2005/07/01 fix flash size wrong alignment after increase firmware partition
+// 165001:henryhsu 2005/8/18 Remove the support for Intel flash because of 2.1 not enough rootfs partition size
+// 165001:henryhsu 2005/9/7 Rolback to support INtel flash
+// 509071:tc.chen 2005/09/07 Reduced flash writing time
+// 511046:linmars 2005/11/04 change bootloader size from 128 into 64
+// 511241:linmars 2005/11/24 merge TaiChen's IRM patch
+
+// copyright 2005 infineon
+
+// copyright 2007 john crispin <blogic@openwrt.org>
+// copyright 2007 felix fietkau <nbd@openwrt.org>
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/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/mutex.h>
+#include <asm/amazon/amazon.h>
+
+#define AMAZON_PCI_ARB_CTL_ALT 0xb100205c
+#define AMAZON_MTD_REG32( addr ) (*(volatile u32 *)(addr))
+
+
+static struct map_info amazon_map = {
+ .name = "AMAZON_FLASH",
+ .bankwidth = 2,
+ .size = 0x400000,
+};
+
+static map_word amazon_read16(struct map_info * map, unsigned long ofs)
+{
+ map_word temp;
+ ofs ^= 2;
+ temp.x[0] = *((__u16 *) (map->virt + ofs));
+ return temp;
+}
+
+static void amazon_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+ adr ^= 2;
+ *((__u16 *) (map->virt + adr)) = d.x[0];
+}
+
+void amazon_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ u8 *p;
+ u8 *to_8;
+ ssize_t l = len;
+ from = (unsigned long) (from + map->virt);
+ p = (u8 *) from;
+ to_8 = (u8 *) to;
+ while(len--){
+ *to_8++ = *p++;
+ }
+}
+
+void amazon_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+ u8 *p = (u8*) from;
+ u8 *to_8;
+ to += (unsigned long) map->virt;
+ to_8 = (u8*)to;
+ while(len--){
+ *p++ = *to_8++;
+ }
+}
+
+#define UBOOT_SIZE 0x40000
+
+static struct mtd_partition amazon_partitions[3] = {
+ {
+ name:"U-Boot", /* U-Boot firmware */
+ offset:0x00000000,
+ size:UBOOT_SIZE , /* 128k */
+ },
+ {
+ name:"kernel", /* firmware */
+ offset:UBOOT_SIZE,
+ size:0x00100000, /* 192K */
+ },
+ {
+ name:"rootfs", /* default partition */
+ offset:0x00200000,
+ size:0x00200000,
+ },
+};
+
+
+unsigned long flash_start = 0x13000000;
+unsigned long flash_size = 0x800000;
+unsigned long uImage_size = 0x10000d;
+
+int find_uImage_size(unsigned long start_offset){
+ unsigned long temp;
+
+ printk("trying to find uImage and its size\n");
+ amazon_copy_from(&amazon_map, &temp, start_offset + 12, 4);
+ printk("kernel size is %d \n", temp + 0x40);
+ return temp + 0x40;
+}
+
+int __init init_amazon_mtd(void)
+{
+ int ret = 0;
+ struct mtd_info *mymtd = NULL;
+ struct mtd_partition *parts = NULL;
+
+ *AMAZON_EBU_BUSCON0 = 0x1d7ff;
+
+ amazon_map.read = amazon_read16;
+ amazon_map.write = amazon_write16;
+ amazon_map.copy_from = amazon_copy_from;
+ amazon_map.copy_to = amazon_copy_to;
+
+ amazon_map.phys = flash_start;
+ amazon_map.virt = ioremap_nocache(flash_start, flash_size);
+
+ if (!amazon_map.virt) {
+ printk(KERN_WARNING "Failed to ioremap!\n");
+ return -EIO;
+ }
+
+ mymtd = (struct mtd_info *) do_map_probe("cfi_probe", &amazon_map);
+ if (!mymtd) {
+ iounmap(amazon_map.virt);
+ printk("probing failed\n");
+ return -ENXIO;
+ }
+
+ mymtd->owner = THIS_MODULE;
+ parts = &amazon_partitions[0];
+ amazon_partitions[2].offset = UBOOT_SIZE + find_uImage_size(amazon_partitions[1].offset);
+ amazon_partitions[1].size = mymtd->size - amazon_partitions[1].offset - (2 * mymtd->erasesize);
+ amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - (2 * mymtd->erasesize);
+ add_mtd_partitions(mymtd, parts, 3);
+ return 0;
+}
+
+static void __exit cleanup_amazon_mtd(void)
+{
+ /* FIXME! */
+}
+
+module_init(init_amazon_mtd);
+module_exit(cleanup_amazon_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("john crispin blogic@openwrt.org");
+MODULE_DESCRIPTION("MTD map driver for AMAZON boards");