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Diffstat (limited to 'arch/cris/arch-v10/drivers/axisflashmap.c')
-rw-r--r--arch/cris/arch-v10/drivers/axisflashmap.c413
1 files changed, 0 insertions, 413 deletions
diff --git a/arch/cris/arch-v10/drivers/axisflashmap.c b/arch/cris/arch-v10/drivers/axisflashmap.c
deleted file mode 100644
index 28292da49664..000000000000
--- a/arch/cris/arch-v10/drivers/axisflashmap.c
+++ /dev/null
@@ -1,413 +0,0 @@
-/*
- * Physical mapping layer for MTD using the Axis partitiontable format
- *
- * Copyright (c) 2001, 2002 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>
-#include <arch/sv_addr_ag.h>
-
-#ifdef CONFIG_CRIS_LOW_MAP
-#define FLASH_UNCACHED_ADDR KSEG_8
-#define FLASH_CACHED_ADDR KSEG_5
-#else
-#define FLASH_UNCACHED_ADDR KSEG_E
-#define FLASH_CACHED_ADDR KSEG_F
-#endif
-
-#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_start, romfs_length, romfs_in_flash;
-
-/* 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
-};
-
-/* If no partition-table was found, we use this default-set. */
-#define MAX_PARTITIONS 7
-#define NUM_DEFAULT_PARTITIONS 3
-
-/*
- * Default flash size is 2MB. CONFIG_ETRAX_PTABLE_SECTOR is most likely the
- * size of one flash block and "filesystem"-partition needs 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 = 0x200000 - (6 * CONFIG_ETRAX_PTABLE_SECTOR),
- .offset = CONFIG_ETRAX_PTABLE_SECTOR
- },
- {
- .name = "filesystem",
- .size = 5 * CONFIG_ETRAX_PTABLE_SECTOR,
- .offset = 0x200000 - (5 * CONFIG_ETRAX_PTABLE_SECTOR)
- }
-};
-
-/* 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
- },
-};
-
-/*
- * 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.
- */
-static struct mtd_info *flash_probe(void)
-{
- struct mtd_info *mtd_cse0;
- struct mtd_info *mtd_cse1;
- struct mtd_info *mtd_cse;
-
- mtd_cse0 = probe_cs(&map_cse0);
- mtd_cse1 = probe_cs(&map_cse1);
-
- if (!mtd_cse0 && !mtd_cse1) {
- /* No chip found. */
- return NULL;
- }
-
- if (mtd_cse0 && mtd_cse1) {
- struct mtd_info *mtds[] = { mtd_cse0, mtd_cse1 };
-
- /* 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_cse = mtd_concat_create(mtds, ARRAY_SIZE(mtds),
- "cse0+cse1");
- if (!mtd_cse) {
- 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_cse = mtd_cse0;
- map_destroy(mtd_cse1);
- }
- } else {
- mtd_cse = mtd_cse0? mtd_cse0 : mtd_cse1;
- }
-
- return mtd_cse;
-}
-
-/*
- * 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 *mymtd;
- int err = 0;
- int pidx = 0;
- struct partitiontable_head *ptable_head = NULL;
- struct partitiontable_entry *ptable;
- int use_default_ptable = 1; /* Until proven otherwise. */
- const char pmsg[] = " /dev/flash%d at 0x%08x, size 0x%08x\n";
-
- if (!(mymtd = flash_probe())) {
- /* 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");
- } else {
- printk(KERN_INFO "%s: 0x%08x bytes of flash memory.\n",
- mymtd->name, mymtd->size);
- axisflash_mtd = mymtd;
- }
-
- if (mymtd) {
- mymtd->owner = THIS_MODULE;
- ptable_head = (struct partitiontable_head *)(FLASH_CACHED_ADDR +
- CONFIG_ETRAX_PTABLE_SECTOR +
- PARTITION_TABLE_OFFSET);
- }
- pidx++; /* First partition is always set to the default. */
-
- 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.
- */
- int ptable_ok = 0;
- 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 " 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 when
- * there is 0xffffffff, that is, empty flash.
- */
- while (ptable_ok
- && ptable->offset != 0xffffffff
- && ptable < max_addr
- && pidx < MAX_PARTITIONS) {
-
- axis_partitions[pidx].offset = offset + ptable->offset;
- axis_partitions[pidx].size = ptable->size;
-
- printk(pmsg, pidx, axis_partitions[pidx].offset,
- axis_partitions[pidx].size);
- pidx++;
- ptable++;
- }
- use_default_ptable = !ptable_ok;
- }
-
- if (romfs_in_flash) {
- /* Add an overlapping device for the root partition (romfs). */
-
- axis_partitions[pidx].name = "romfs";
- axis_partitions[pidx].size = romfs_length;
- axis_partitions[pidx].offset = romfs_start - FLASH_CACHED_ADDR;
- axis_partitions[pidx].mask_flags |= MTD_WRITEABLE;
-
- printk(KERN_INFO
- " Adding readonly flash partition for romfs image:\n");
- printk(pmsg, pidx, axis_partitions[pidx].offset,
- axis_partitions[pidx].size);
- pidx++;
- }
-
- if (mymtd) {
- if (use_default_ptable) {
- printk(KERN_INFO " Using default partition table.\n");
- err = mtd_device_register(mymtd,
- axis_default_partitions,
- NUM_DEFAULT_PARTITIONS);
- } else {
- err = mtd_device_register(mymtd, axis_partitions,
- pidx);
- }
-
- if (err)
- panic("axisflashmap could not add MTD partitions!\n");
- }
-
- if (!romfs_in_flash) {
- /* Create an RAM device for the root partition (romfs). */
-
-#if !defined(CONFIG_MTD_MTDRAM) || (CONFIG_MTDRAM_TOTAL_SIZE != 0)
- /* No use trying to boot this kernel from RAM. Panic! */
- printk(KERN_EMERG "axisflashmap: Cannot create an MTD RAM "
- "device due to kernel (mis)configuration!\n");
- panic("This kernel cannot boot from RAM!\n");
-#else
- 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 " Adding RAM partition for romfs image:\n");
- printk(pmsg, pidx, (unsigned)romfs_start,
- (unsigned)romfs_length);
-
- err = mtdram_init_device(mtd_ram,
- (void *)romfs_start,
- romfs_length,
- "romfs");
- if (err)
- panic("axisflashmap could not initialize MTD RAM "
- "device!\n");
-#endif
- }
- return err;
-}
-
-/* This adds the above to the kernels init-call chain. */
-module_init(init_axis_flash);
-
-EXPORT_SYMBOL(axisflash_mtd);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.