static LIST_HEAD(phram_list);
-
static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
u_char *start = mtd->priv;
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
-
memset(start + instr->addr, 0xff, instr->len);
/* This'll catch a few races. Free the thing before returning :)
* I don't feel at all ashamed. This kind of thing is possible anyway
* with flash, but unlikely.
*/
-
instr->state = MTD_ERASE_DONE;
-
mtd_erase_callback(instr);
-
return 0;
}
static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
- /* can we return a physical address with this driver? */
- if (phys)
- return -EINVAL;
-
*virt = mtd->priv + from;
*retlen = len;
return 0;
{
u_char *start = mtd->priv;
- if (from >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - from)
- len = mtd->size - from;
-
memcpy(buf, start + from, len);
-
*retlen = len;
return 0;
}
{
u_char *start = mtd->priv;
- if (to >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - to)
- len = mtd->size - to;
-
memcpy(start + to, buf, len);
-
*retlen = len;
return 0;
}
-
-
static void unregister_devices(void)
{
struct phram_mtd_list *this, *safe;