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path: root/target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c
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Diffstat (limited to 'target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c')
-rw-r--r--target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c243
1 files changed, 0 insertions, 243 deletions
diff --git a/target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c b/target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c
deleted file mode 100644
index e732334e92..0000000000
--- a/target/linux/rdc/files/drivers/mtd/maps/bifferboard-flash.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/* Flash mapping for Bifferboard, (c) bifferos@yahoo.co.uk
- * Works with 1, 4 and 8MB flash versions
- */
-
-#include <linux/delay.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-
-#define DRV "bifferboard-flash: "
-
-static struct mtd_info *bb_mtd = NULL;
-
-#define SIZE_BIFFBOOT 0x10000
-#define SIZE_SECTOR 0x10000
-#define SIZE_CONFIG 0x02000
-#define SIZE_1MB 0x00100000
-#define SIZE_4MB 0x00400000
-#define SIZE_8MB 0x00800000
-
-#define BASE_1MB 0xfff00000
-#define BASE_4MB 0xffc00000
-#define BASE_8MB 0xff800000
-
-#define OFFS_KERNEL 0x6000
-#define OFFS_CONFIG 0x4000
-
-/*
- * Flash detection code. This is needed because the cfi_probe doesn't probe
- * for the size correctly. You actually have to know the flash size before you
- * call it, or so it seems. It does work correctly if you map the entire flash
- * chip, but unsure of the implications for mapping more mem than exists.
- */
-
-static unsigned char ReadFlash(void* base, u32 addr)
-{
- unsigned char val = *(volatile unsigned char *)(base+addr);
- udelay(1);
- return val;
-}
-
-static void WriteFlash(void* base, u32 addr, unsigned short data)
-{
- *(volatile unsigned short *)(base+addr) = data;
-}
-
-static DEFINE_SPINLOCK(flash_lock);
-
-static u32 bb_detect(void)
-{
- u32 ret = 0;
- ulong flags;
-
- /* for detection, map in just the 1MB device, 1st 64k is enough */
- void* base = ioremap_nocache(BASE_1MB, 0x10000);
-
- if (!base)
- {
- pr_err(DRV "Failed to map flash for probing\n");
- return 0;
- }
-
- spin_lock_irqsave(&flash_lock, flags);
-
- /* put flash in auto-detect mode */
- WriteFlash(base, 0xaaaa, 0xaaaa);
- WriteFlash(base, 0x5554, 0x5555);
- WriteFlash(base, 0xaaaa, 0x9090);
-
- /* Read the auto-config data - 4 values in total */
- ret = ReadFlash(base, 0x0000); ret <<= 8;
- ret |= ReadFlash(base, 0x0200); ret <<= 8;
- ret |= ReadFlash(base, 0x0003); ret <<= 8;
- ret |= ReadFlash(base, 0x0002);
-
- /* exit the autodetect state */
- WriteFlash(base, 0x0000, 0xf0f0);
-
- spin_unlock_irqrestore(&flash_lock, flags);
-
- /* unmap it, it'll be re-mapped based on the detection */
- iounmap(base);
-
- return ret;
-}
-
-
-static struct map_info bb_map;
-
-/* Update the map, using the detected flash signature. */
-static int bb_adjust_map(unsigned long sig, struct map_info* m)
-{
- m->bankwidth = 2;
- switch (sig)
- {
- case 0x7f1c225b :
- m->name = "ENLV800B";
- m->phys = BASE_1MB;
- m->size = SIZE_1MB;
- break;
- case 0x7f1c22f9 :
- m->name = "ENLV320B";
- m->phys = BASE_4MB;
- m->size = SIZE_4MB;
- break;
- case 0x7f1c22cb :
- m->name = "ENLV640B";
- m->phys = BASE_8MB;
- m->size = SIZE_8MB;
- break;
- default:
- return -ENXIO;
- }
- return 0;
-}
-
-
-/* adjust partition sizes, prior to adding the partition
- * Values not specified by defines here are subject to replacement based on
- * the real flash size. (0x00000000 being the exception, of course) */
-
-static struct mtd_partition bb_parts[] =
-{
-/* 0 */ { name: "kernel", offset: 0x00000000, size: 0x000fa000 },
-/* 1 */ { name: "rootfs", offset: MTDPART_OFS_APPEND, size: 0x002F0000 },
-/* 2 */ { name: "biffboot", offset: MTDPART_OFS_APPEND, size: MTDPART_SIZ_FULL, mask_flags: MTD_WRITEABLE },
-};
-
-
-/* returns the count of partitions to be used */
-static ulong bb_adjust_partitions(struct map_info* m)
-{
- /* Read the kernel offset value, 1036 bytes into the config block. */
- u16 km_units = *((u16*)(m->virt + OFFS_CONFIG + 1036));
- u32 kernelmax = 0x200000; /* Biffboot 2.7 or earlier default */
-
- /* special-case 1MB devices, because there are fewer partitions */
- if (m->size == SIZE_1MB)
- {
- bb_parts[0].size = SIZE_1MB - SIZE_BIFFBOOT; /* kernel */
- bb_parts[1].name = "biffboot"; /* biffboot */
- bb_parts[1].offset = MTDPART_OFS_APPEND; /* biffboot */
- bb_parts[1].size = MTDPART_SIZ_FULL; /* biffboot */
- bb_parts[1].mask_flags = MTD_WRITEABLE;
- return 2; /* because there's no rootfs now */
- }
-
- /* sanity check */
- if (km_units > ((m->size-SIZE_BIFFBOOT)/SIZE_SECTOR))
- {
- pr_err(DRV "config block has invalid kernelmax\n");
- return 0;
- }
-
- kernelmax = km_units * SIZE_SECTOR;
-
- /* Kernel */
- bb_parts[0].size = kernelmax;
-
- /* rootfs */
- bb_parts[1].size = m->size - kernelmax - SIZE_BIFFBOOT;
-
- return 3; /* 3 partitions */
-}
-
-
-static int __init init_bb_map(void)
-{
- int ret;
- ulong signature = bb_detect();
- ulong part_len;
-
- if (!signature)
- {
- pr_err(DRV "Undetected flash chip");
- return -ENXIO;
- }
-
- ret = bb_adjust_map(signature, &bb_map);
-
- if (ret)
- {
- pr_err(DRV "Unrecognised flash chip (signature: 0x%lx)\n", signature);
- return ret;
- }
-
- bb_map.virt = ioremap_nocache(bb_map.phys, bb_map.size);
- if (!bb_map.virt)
- {
- pr_err(DRV "ioremap\n");
- return -EIO;
- }
-
- bb_mtd = do_map_probe("cfi_probe", &bb_map);
- if (!bb_mtd)
- {
- /* cfi_probe fails here for 1MB devices */
- pr_err(DRV "cfi_probe\n");
- ret = -ENXIO;
- goto err;
- }
-
- part_len = bb_adjust_partitions(&bb_map);
- if (!part_len)
- {
- pr_err(DRV "no partitions established");
- ret = -ENXIO;
- goto err2;
- }
-
- bb_mtd->owner = THIS_MODULE;
- ret = add_mtd_partitions(bb_mtd, bb_parts, part_len);
- if (ret)
- {
- pr_err(DRV "add_mtd_partitions\n");
- ret = -ENXIO;
- goto err2;
- }
-
- return 0;
-
-err2:
- map_destroy(bb_mtd);
-err:
- iounmap(bb_map.virt);
-
- return ret;
-}
-
-static void __exit exit_bb_map(void)
-{
- del_mtd_partitions(bb_mtd);
- map_destroy(bb_mtd);
- iounmap(bb_map.virt);
-}
-
-module_init(init_bb_map);
-module_exit(exit_bb_map);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Bifferos <bifferos@yahoo.co.uk>");
-MODULE_DESCRIPTION("MTD map driver for Bifferboard");
-
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