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-rw-r--r--arch/cris/arch-v32/drivers/axisflashmap.c592
1 files changed, 0 insertions, 592 deletions
diff --git a/arch/cris/arch-v32/drivers/axisflashmap.c b/arch/cris/arch-v32/drivers/axisflashmap.c
deleted file mode 100644
index 87656c41fec7..000000000000
--- a/arch/cris/arch-v32/drivers/axisflashmap.c
+++ /dev/null
@@ -1,592 +0,0 @@
-/*
- * Physical mapping layer for MTD using the Axis partitiontable format
- *
- * Copyright (c) 2001-2007 Axis Communications AB
- *
- * This file is under the GPL.
- *
- * First partition is always sector 0 regardless of if we find a partitiontable
- * or not. In the start of the next sector, there can be a partitiontable that
- * tells us what other partitions to define. If there isn't, we use a default
- * partition split defined below.
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/concat.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/mtdram.h>
-#include <linux/mtd/partitions.h>
-
-#include <asm/axisflashmap.h>
-#include <asm/mmu.h>
-
-#define MEM_CSE0_SIZE (0x04000000)
-#define MEM_CSE1_SIZE (0x04000000)
-
-#define FLASH_UNCACHED_ADDR KSEG_E
-#define FLASH_CACHED_ADDR KSEG_F
-
-#define PAGESIZE (512)
-
-#if CONFIG_ETRAX_FLASH_BUSWIDTH==1
-#define flash_data __u8
-#elif CONFIG_ETRAX_FLASH_BUSWIDTH==2
-#define flash_data __u16
-#elif CONFIG_ETRAX_FLASH_BUSWIDTH==4
-#define flash_data __u32
-#endif
-
-/* From head.S */
-extern unsigned long romfs_in_flash; /* 1 when romfs_start, _length in flash */
-extern unsigned long romfs_start, romfs_length;
-extern unsigned long nand_boot; /* 1 when booted from nand flash */
-
-struct partition_name {
- char name[6];
-};
-
-/* The master mtd for the entire flash. */
-struct mtd_info* axisflash_mtd = NULL;
-
-/* Map driver functions. */
-
-static map_word flash_read(struct map_info *map, unsigned long ofs)
-{
- map_word tmp;
- tmp.x[0] = *(flash_data *)(map->map_priv_1 + ofs);
- return tmp;
-}
-
-static void flash_copy_from(struct map_info *map, void *to,
- unsigned long from, ssize_t len)
-{
- memcpy(to, (void *)(map->map_priv_1 + from), len);
-}
-
-static void flash_write(struct map_info *map, map_word d, unsigned long adr)
-{
- *(flash_data *)(map->map_priv_1 + adr) = (flash_data)d.x[0];
-}
-
-/*
- * The map for chip select e0.
- *
- * We run into tricky coherence situations if we mix cached with uncached
- * accesses to we only use the uncached version here.
- *
- * The size field is the total size where the flash chips may be mapped on the
- * chip select. MTD probes should find all devices there and it does not matter
- * if there are unmapped gaps or aliases (mirrors of flash devices). The MTD
- * probes will ignore them.
- *
- * The start address in map_priv_1 is in virtual memory so we cannot use
- * MEM_CSE0_START but must rely on that FLASH_UNCACHED_ADDR is the start
- * address of cse0.
- */
-static struct map_info map_cse0 = {
- .name = "cse0",
- .size = MEM_CSE0_SIZE,
- .bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
- .read = flash_read,
- .copy_from = flash_copy_from,
- .write = flash_write,
- .map_priv_1 = FLASH_UNCACHED_ADDR
-};
-
-/*
- * The map for chip select e1.
- *
- * If there was a gap between cse0 and cse1, map_priv_1 would get the wrong
- * address, but there isn't.
- */
-static struct map_info map_cse1 = {
- .name = "cse1",
- .size = MEM_CSE1_SIZE,
- .bankwidth = CONFIG_ETRAX_FLASH_BUSWIDTH,
- .read = flash_read,
- .copy_from = flash_copy_from,
- .write = flash_write,
- .map_priv_1 = FLASH_UNCACHED_ADDR + MEM_CSE0_SIZE
-};
-
-#define MAX_PARTITIONS 7
-#ifdef CONFIG_ETRAX_NANDBOOT
-#define NUM_DEFAULT_PARTITIONS 4
-#define DEFAULT_ROOTFS_PARTITION_NO 2
-#define DEFAULT_MEDIA_SIZE 0x2000000 /* 32 megs */
-#else
-#define NUM_DEFAULT_PARTITIONS 3
-#define DEFAULT_ROOTFS_PARTITION_NO (-1)
-#define DEFAULT_MEDIA_SIZE 0x800000 /* 8 megs */
-#endif
-
-#if (MAX_PARTITIONS < NUM_DEFAULT_PARTITIONS)
-#error MAX_PARTITIONS must be >= than NUM_DEFAULT_PARTITIONS
-#endif
-
-/* Initialize the ones normally used. */
-static struct mtd_partition axis_partitions[MAX_PARTITIONS] = {
- {
- .name = "part0",
- .size = CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = 0
- },
- {
- .name = "part1",
- .size = 0,
- .offset = 0
- },
- {
- .name = "part2",
- .size = 0,
- .offset = 0
- },
- {
- .name = "part3",
- .size = 0,
- .offset = 0
- },
- {
- .name = "part4",
- .size = 0,
- .offset = 0
- },
- {
- .name = "part5",
- .size = 0,
- .offset = 0
- },
- {
- .name = "part6",
- .size = 0,
- .offset = 0
- },
-};
-
-
-/* If no partition-table was found, we use this default-set.
- * Default flash size is 8MB (NOR). CONFIG_ETRAX_PTABLE_SECTOR is most
- * likely the size of one flash block and "filesystem"-partition needs
- * to be >=5 blocks to be able to use JFFS.
- */
-static struct mtd_partition axis_default_partitions[NUM_DEFAULT_PARTITIONS] = {
- {
- .name = "boot firmware",
- .size = CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = 0
- },
- {
- .name = "kernel",
- .size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = CONFIG_ETRAX_PTABLE_SECTOR
- },
-#define FILESYSTEM_SECTOR (11 * CONFIG_ETRAX_PTABLE_SECTOR)
-#ifdef CONFIG_ETRAX_NANDBOOT
- {
- .name = "rootfs",
- .size = 10 * CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = FILESYSTEM_SECTOR
- },
-#undef FILESYSTEM_SECTOR
-#define FILESYSTEM_SECTOR (21 * CONFIG_ETRAX_PTABLE_SECTOR)
-#endif
- {
- .name = "rwfs",
- .size = DEFAULT_MEDIA_SIZE - FILESYSTEM_SECTOR,
- .offset = FILESYSTEM_SECTOR
- }
-};
-
-#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
-/* Main flash device */
-static struct mtd_partition main_partition = {
- .name = "main",
- .size = 0,
- .offset = 0
-};
-#endif
-
-/* Auxiliary partition if we find another flash */
-static struct mtd_partition aux_partition = {
- .name = "aux",
- .size = 0,
- .offset = 0
-};
-
-/*
- * Probe a chip select for AMD-compatible (JEDEC) or CFI-compatible flash
- * chips in that order (because the amd_flash-driver is faster).
- */
-static struct mtd_info *probe_cs(struct map_info *map_cs)
-{
- struct mtd_info *mtd_cs = NULL;
-
- printk(KERN_INFO
- "%s: Probing a 0x%08lx bytes large window at 0x%08lx.\n",
- map_cs->name, map_cs->size, map_cs->map_priv_1);
-
-#ifdef CONFIG_MTD_CFI
- mtd_cs = do_map_probe("cfi_probe", map_cs);
-#endif
-#ifdef CONFIG_MTD_JEDECPROBE
- if (!mtd_cs)
- mtd_cs = do_map_probe("jedec_probe", map_cs);
-#endif
-
- return mtd_cs;
-}
-
-/*
- * Probe each chip select individually for flash chips. If there are chips on
- * both cse0 and cse1, the mtd_info structs will be concatenated to one struct
- * so that MTD partitions can cross chip boundaries.
- *
- * The only known restriction to how you can mount your chips is that each
- * chip select must hold similar flash chips. But you need external hardware
- * to do that anyway and you can put totally different chips on cse0 and cse1
- * so it isn't really much of a restriction.
- */
-extern struct mtd_info* __init crisv32_nand_flash_probe (void);
-static struct mtd_info *flash_probe(void)
-{
- struct mtd_info *mtd_cse0;
- struct mtd_info *mtd_cse1;
- struct mtd_info *mtd_total;
- struct mtd_info *mtds[2];
- int count = 0;
-
- if ((mtd_cse0 = probe_cs(&map_cse0)) != NULL)
- mtds[count++] = mtd_cse0;
- if ((mtd_cse1 = probe_cs(&map_cse1)) != NULL)
- mtds[count++] = mtd_cse1;
-
- if (!mtd_cse0 && !mtd_cse1) {
- /* No chip found. */
- return NULL;
- }
-
- if (count > 1) {
- /* Since the concatenation layer adds a small overhead we
- * could try to figure out if the chips in cse0 and cse1 are
- * identical and reprobe the whole cse0+cse1 window. But since
- * flash chips are slow, the overhead is relatively small.
- * So we use the MTD concatenation layer instead of further
- * complicating the probing procedure.
- */
- mtd_total = mtd_concat_create(mtds, count, "cse0+cse1");
- if (!mtd_total) {
- printk(KERN_ERR "%s and %s: Concatenation failed!\n",
- map_cse0.name, map_cse1.name);
-
- /* The best we can do now is to only use what we found
- * at cse0. */
- mtd_total = mtd_cse0;
- map_destroy(mtd_cse1);
- }
- } else
- mtd_total = mtd_cse0 ? mtd_cse0 : mtd_cse1;
-
- return mtd_total;
-}
-
-/*
- * Probe the flash chip(s) and, if it succeeds, read the partition-table
- * and register the partitions with MTD.
- */
-static int __init init_axis_flash(void)
-{
- struct mtd_info *main_mtd;
- struct mtd_info *aux_mtd = NULL;
- int err = 0;
- int pidx = 0;
- struct partitiontable_head *ptable_head = NULL;
- struct partitiontable_entry *ptable;
- int ptable_ok = 0;
- static char page[PAGESIZE];
- size_t len;
- int ram_rootfs_partition = -1; /* -1 => no RAM rootfs partition */
- int part;
- struct mtd_partition *partition;
-
- /* We need a root fs. If it resides in RAM, we need to use an
- * MTDRAM device, so it must be enabled in the kernel config,
- * but its size must be configured as 0 so as not to conflict
- * with our usage.
- */
-#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0)
- if (!romfs_in_flash && !nand_boot) {
- printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
- "device; configure CONFIG_MTD_MTDRAM with size = 0!\n");
- panic("This kernel cannot boot from RAM!\n");
- }
-#endif
-
- main_mtd = flash_probe();
- if (main_mtd)
- printk(KERN_INFO "%s: 0x%08llx bytes of NOR flash memory.\n",
- main_mtd->name, main_mtd->size);
-
-#ifdef CONFIG_ETRAX_NANDFLASH
- aux_mtd = crisv32_nand_flash_probe();
- if (aux_mtd)
- printk(KERN_INFO "%s: 0x%08x bytes of NAND flash memory.\n",
- aux_mtd->name, aux_mtd->size);
-
-#ifdef CONFIG_ETRAX_NANDBOOT
- {
- struct mtd_info *tmp_mtd;
-
- printk(KERN_INFO "axisflashmap: Set to boot from NAND flash, "
- "making NAND flash primary device.\n");
- tmp_mtd = main_mtd;
- main_mtd = aux_mtd;
- aux_mtd = tmp_mtd;
- }
-#endif /* CONFIG_ETRAX_NANDBOOT */
-#endif /* CONFIG_ETRAX_NANDFLASH */
-
- if (!main_mtd && !aux_mtd) {
- /* There's no reason to use this module if no flash chip can
- * be identified. Make sure that's understood.
- */
- printk(KERN_INFO "axisflashmap: Found no flash chip.\n");
- }
-
-#if 0 /* Dump flash memory so we can see what is going on */
- if (main_mtd) {
- int sectoraddr;
- for (sectoraddr = 0; sectoraddr < 2*65536+4096;
- sectoraddr += PAGESIZE) {
- main_mtd->read(main_mtd, sectoraddr, PAGESIZE, &len,
- page);
- printk(KERN_INFO
- "Sector at %d (length %d):\n",
- sectoraddr, len);
- print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, page, PAGESIZE, false);
- }
- }
-#endif
-
- if (main_mtd) {
- loff_t ptable_sector = CONFIG_ETRAX_PTABLE_SECTOR;
- main_mtd->owner = THIS_MODULE;
- axisflash_mtd = main_mtd;
-
-
- /* First partition (rescue) is always set to the default. */
- pidx++;
-#ifdef CONFIG_ETRAX_NANDBOOT
- /* We know where the partition table should be located,
- * it will be in first good block after that.
- */
- int blockstat;
- do {
- blockstat = mtd_block_isbad(main_mtd, ptable_sector);
- if (blockstat < 0)
- ptable_sector = 0; /* read error */
- else if (blockstat)
- ptable_sector += main_mtd->erasesize;
- } while (blockstat && ptable_sector);
-#endif
- if (ptable_sector) {
- mtd_read(main_mtd, ptable_sector, PAGESIZE, &len,
- page);
- ptable_head = &((struct partitiontable *) page)->head;
- }
-
-#if 0 /* Dump partition table so we can see what is going on */
- printk(KERN_INFO
- "axisflashmap: flash read %d bytes at 0x%08x, data: %8ph\n",
- len, CONFIG_ETRAX_PTABLE_SECTOR, page);
- printk(KERN_INFO
- "axisflashmap: partition table offset %d, data: %8ph\n",
- PARTITION_TABLE_OFFSET, page + PARTITION_TABLE_OFFSET);
-#endif
- }
-
- if (ptable_head && (ptable_head->magic == PARTITION_TABLE_MAGIC)
- && (ptable_head->size <
- (MAX_PARTITIONS * sizeof(struct partitiontable_entry) +
- PARTITIONTABLE_END_MARKER_SIZE))
- && (*(unsigned long*)((void*)ptable_head + sizeof(*ptable_head) +
- ptable_head->size -
- PARTITIONTABLE_END_MARKER_SIZE)
- == PARTITIONTABLE_END_MARKER)) {
- /* Looks like a start, sane length and end of a
- * partition table, lets check csum etc.
- */
- struct partitiontable_entry *max_addr =
- (struct partitiontable_entry *)
- ((unsigned long)ptable_head + sizeof(*ptable_head) +
- ptable_head->size);
- unsigned long offset = CONFIG_ETRAX_PTABLE_SECTOR;
- unsigned char *p;
- unsigned long csum = 0;
-
- ptable = (struct partitiontable_entry *)
- ((unsigned long)ptable_head + sizeof(*ptable_head));
-
- /* Lets be PARANOID, and check the checksum. */
- p = (unsigned char*) ptable;
-
- while (p <= (unsigned char*)max_addr) {
- csum += *p++;
- csum += *p++;
- csum += *p++;
- csum += *p++;
- }
- ptable_ok = (csum == ptable_head->checksum);
-
- /* Read the entries and use/show the info. */
- printk(KERN_INFO "axisflashmap: "
- "Found a%s partition table at 0x%p-0x%p.\n",
- (ptable_ok ? " valid" : "n invalid"), ptable_head,
- max_addr);
-
- /* We have found a working bootblock. Now read the
- * partition table. Scan the table. It ends with 0xffffffff.
- */
- while (ptable_ok
- && ptable->offset != PARTITIONTABLE_END_MARKER
- && ptable < max_addr
- && pidx < MAX_PARTITIONS - 1) {
-
- axis_partitions[pidx].offset = offset + ptable->offset;
-#ifdef CONFIG_ETRAX_NANDFLASH
- if (main_mtd->type == MTD_NANDFLASH) {
- axis_partitions[pidx].size =
- (((ptable+1)->offset ==
- PARTITIONTABLE_END_MARKER) ?
- main_mtd->size :
- ((ptable+1)->offset + offset)) -
- (ptable->offset + offset);
-
- } else
-#endif /* CONFIG_ETRAX_NANDFLASH */
- axis_partitions[pidx].size = ptable->size;
-#ifdef CONFIG_ETRAX_NANDBOOT
- /* Save partition number of jffs2 ro partition.
- * Needed if RAM booting or root file system in RAM.
- */
- if (!nand_boot &&
- ram_rootfs_partition < 0 && /* not already set */
- ptable->type == PARTITION_TYPE_JFFS2 &&
- (ptable->flags & PARTITION_FLAGS_READONLY_MASK) ==
- PARTITION_FLAGS_READONLY)
- ram_rootfs_partition = pidx;
-#endif /* CONFIG_ETRAX_NANDBOOT */
- pidx++;
- ptable++;
- }
- }
-
- /* Decide whether to use default partition table. */
- /* Only use default table if we actually have a device (main_mtd) */
-
- partition = &axis_partitions[0];
- if (main_mtd && !ptable_ok) {
- memcpy(axis_partitions, axis_default_partitions,
- sizeof(axis_default_partitions));
- pidx = NUM_DEFAULT_PARTITIONS;
- ram_rootfs_partition = DEFAULT_ROOTFS_PARTITION_NO;
- }
-
- /* Add artificial partitions for rootfs if necessary */
- if (romfs_in_flash) {
- /* rootfs is in directly accessible flash memory = NOR flash.
- Add an overlapping device for the rootfs partition. */
- printk(KERN_INFO "axisflashmap: Adding partition for "
- "overlapping root file system image\n");
- axis_partitions[pidx].size = romfs_length;
- axis_partitions[pidx].offset = romfs_start - FLASH_CACHED_ADDR;
- axis_partitions[pidx].name = "romfs";
- axis_partitions[pidx].mask_flags |= MTD_WRITEABLE;
- ram_rootfs_partition = -1;
- pidx++;
- } else if (romfs_length && !nand_boot) {
- /* romfs exists in memory, but not in flash, so must be in RAM.
- * Configure an MTDRAM partition. */
- if (ram_rootfs_partition < 0) {
- /* None set yet, put it at the end */
- ram_rootfs_partition = pidx;
- pidx++;
- }
- printk(KERN_INFO "axisflashmap: Adding partition for "
- "root file system image in RAM\n");
- axis_partitions[ram_rootfs_partition].size = romfs_length;
- axis_partitions[ram_rootfs_partition].offset = romfs_start;
- axis_partitions[ram_rootfs_partition].name = "romfs";
- axis_partitions[ram_rootfs_partition].mask_flags |=
- MTD_WRITEABLE;
- }
-
-#ifdef CONFIG_ETRAX_AXISFLASHMAP_MTD0WHOLE
- if (main_mtd) {
- main_partition.size = main_mtd->size;
- err = mtd_device_register(main_mtd, &main_partition, 1);
- if (err)
- panic("axisflashmap: Could not initialize "
- "partition for whole main mtd device!\n");
- }
-#endif
-
- /* Now, register all partitions with mtd.
- * We do this one at a time so we can slip in an MTDRAM device
- * in the proper place if required. */
-
- for (part = 0; part < pidx; part++) {
- if (part == ram_rootfs_partition) {
- /* add MTDRAM partition here */
- struct mtd_info *mtd_ram;
-
- mtd_ram = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
- if (!mtd_ram)
- panic("axisflashmap: Couldn't allocate memory "
- "for mtd_info!\n");
- printk(KERN_INFO "axisflashmap: Adding RAM partition "
- "for rootfs image.\n");
- err = mtdram_init_device(mtd_ram,
- (void *)(u_int32_t)partition[part].offset,
- partition[part].size,
- partition[part].name);
- if (err)
- panic("axisflashmap: Could not initialize "
- "MTD RAM device!\n");
- /* JFFS2 likes to have an erasesize. Keep potential
- * JFFS2 rootfs happy by providing one. Since image
- * was most likely created for main mtd, use that
- * erasesize, if available. Otherwise, make a guess. */
- mtd_ram->erasesize = (main_mtd ? main_mtd->erasesize :
- CONFIG_ETRAX_PTABLE_SECTOR);
- } else {
- err = mtd_device_register(main_mtd, &partition[part],
- 1);
- if (err)
- panic("axisflashmap: Could not add mtd "
- "partition %d\n", part);
- }
- }
-
- if (aux_mtd) {
- aux_partition.size = aux_mtd->size;
- err = mtd_device_register(aux_mtd, &aux_partition, 1);
- if (err)
- panic("axisflashmap: Could not initialize "
- "aux mtd device!\n");
-
- }
-
- return err;
-}
-
-/* This adds the above to the kernels init-call chain. */
-module_init(init_axis_flash);
-
-EXPORT_SYMBOL(axisflash_mtd);