0a8899b31a
mtdram_init_device() wasn't updated along with mtd_partition.name. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
|
|
* mtdram - a test mtd device
|
|
* Author: Alexander Larsson <alex@cendio.se>
|
|
*
|
|
* Copyright (c) 1999 Alexander Larsson <alex@cendio.se>
|
|
* Copyright (c) 2005 Joern Engel <joern@wh.fh-wedel.de>
|
|
*
|
|
* This code is GPL
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/mtdram.h>
|
|
|
|
static unsigned long total_size = CONFIG_MTDRAM_TOTAL_SIZE;
|
|
static unsigned long erase_size = CONFIG_MTDRAM_ERASE_SIZE;
|
|
#define MTDRAM_TOTAL_SIZE (total_size * 1024)
|
|
#define MTDRAM_ERASE_SIZE (erase_size * 1024)
|
|
|
|
#ifdef MODULE
|
|
module_param(total_size, ulong, 0);
|
|
MODULE_PARM_DESC(total_size, "Total device size in KiB");
|
|
module_param(erase_size, ulong, 0);
|
|
MODULE_PARM_DESC(erase_size, "Device erase block size in KiB");
|
|
#endif
|
|
|
|
// We could store these in the mtd structure, but we only support 1 device..
|
|
static struct mtd_info *mtd_info;
|
|
|
|
static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
|
|
{
|
|
memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
|
|
instr->state = MTD_ERASE_DONE;
|
|
mtd_erase_callback(instr);
|
|
return 0;
|
|
}
|
|
|
|
static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, void **virt, resource_size_t *phys)
|
|
{
|
|
*virt = mtd->priv + from;
|
|
*retlen = len;
|
|
return 0;
|
|
}
|
|
|
|
static int ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Allow NOMMU mmap() to directly map the device (if not NULL)
|
|
* - return the address to which the offset maps
|
|
* - return -ENOSYS to indicate refusal to do the mapping
|
|
*/
|
|
static unsigned long ram_get_unmapped_area(struct mtd_info *mtd,
|
|
unsigned long len,
|
|
unsigned long offset,
|
|
unsigned long flags)
|
|
{
|
|
return (unsigned long) mtd->priv + offset;
|
|
}
|
|
|
|
static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, u_char *buf)
|
|
{
|
|
memcpy(buf, mtd->priv + from, len);
|
|
*retlen = len;
|
|
return 0;
|
|
}
|
|
|
|
static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,
|
|
size_t *retlen, const u_char *buf)
|
|
{
|
|
memcpy((char *)mtd->priv + to, buf, len);
|
|
*retlen = len;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit cleanup_mtdram(void)
|
|
{
|
|
if (mtd_info) {
|
|
mtd_device_unregister(mtd_info);
|
|
vfree(mtd_info->priv);
|
|
kfree(mtd_info);
|
|
}
|
|
}
|
|
|
|
int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
|
|
unsigned long size, const char *name)
|
|
{
|
|
memset(mtd, 0, sizeof(*mtd));
|
|
|
|
/* Setup the MTD structure */
|
|
mtd->name = name;
|
|
mtd->type = MTD_RAM;
|
|
mtd->flags = MTD_CAP_RAM;
|
|
mtd->size = size;
|
|
mtd->writesize = 1;
|
|
mtd->writebufsize = 64; /* Mimic CFI NOR flashes */
|
|
mtd->erasesize = MTDRAM_ERASE_SIZE;
|
|
mtd->priv = mapped_address;
|
|
|
|
mtd->owner = THIS_MODULE;
|
|
mtd->_erase = ram_erase;
|
|
mtd->_point = ram_point;
|
|
mtd->_unpoint = ram_unpoint;
|
|
mtd->_get_unmapped_area = ram_get_unmapped_area;
|
|
mtd->_read = ram_read;
|
|
mtd->_write = ram_write;
|
|
|
|
if (mtd_device_register(mtd, NULL, 0))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init init_mtdram(void)
|
|
{
|
|
void *addr;
|
|
int err;
|
|
|
|
if (!total_size)
|
|
return -EINVAL;
|
|
|
|
/* Allocate some memory */
|
|
mtd_info = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
|
|
if (!mtd_info)
|
|
return -ENOMEM;
|
|
|
|
addr = vmalloc(MTDRAM_TOTAL_SIZE);
|
|
if (!addr) {
|
|
kfree(mtd_info);
|
|
mtd_info = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
err = mtdram_init_device(mtd_info, addr, MTDRAM_TOTAL_SIZE, "mtdram test device");
|
|
if (err) {
|
|
vfree(addr);
|
|
kfree(mtd_info);
|
|
mtd_info = NULL;
|
|
return err;
|
|
}
|
|
memset(mtd_info->priv, 0xff, MTDRAM_TOTAL_SIZE);
|
|
return err;
|
|
}
|
|
|
|
module_init(init_mtdram);
|
|
module_exit(cleanup_mtdram);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Alexander Larsson <alexl@redhat.com>");
|
|
MODULE_DESCRIPTION("Simulated MTD driver for testing");
|