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path: root/drivers/mtd/devices/mtdram.c
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Diffstat (limited to 'drivers/mtd/devices/mtdram.c')
-rw-r--r--drivers/mtd/devices/mtdram.c265
1 files changed, 96 insertions, 169 deletions
diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index edac415..bb713fe 100644
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -1,9 +1,10 @@
/*
* mtdram - a test mtd device
- * $Id: mtdram.c,v 1.35 2005/01/05 18:05:12 dwmw2 Exp $
+ * $Id: mtdram.c,v 1.37 2005/04/21 03:42:11 joern Exp $
* 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
*
@@ -18,213 +19,140 @@
#include <linux/mtd/compatmac.h>
#include <linux/mtd/mtd.h>
-#ifndef CONFIG_MTDRAM_ABS_POS
- #define CONFIG_MTDRAM_ABS_POS 0
-#endif
-
-#if CONFIG_MTDRAM_ABS_POS > 0
- #include <asm/io.h>
-#endif
-
-#ifdef MODULE
static unsigned long total_size = CONFIG_MTDRAM_TOTAL_SIZE;
static unsigned long erase_size = CONFIG_MTDRAM_ERASE_SIZE;
-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");
#define MTDRAM_TOTAL_SIZE (total_size * 1024)
#define MTDRAM_ERASE_SIZE (erase_size * 1024)
-#else
-#define MTDRAM_TOTAL_SIZE (CONFIG_MTDRAM_TOTAL_SIZE * 1024)
-#define MTDRAM_ERASE_SIZE (CONFIG_MTDRAM_ERASE_SIZE * 1024)
-#endif
+#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)
+static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
- DEBUG(MTD_DEBUG_LEVEL2, "ram_erase(pos:%ld, len:%ld)\n", (long)instr->addr, (long)instr->len);
- if (instr->addr + instr->len > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL1, "ram_erase() out of bounds (%ld > %ld)\n", (long)(instr->addr + instr->len), (long)mtd->size);
- return -EINVAL;
- }
-
- memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
-
- instr->state = MTD_ERASE_DONE;
- mtd_erase_callback(instr);
-
- return 0;
+ if (instr->addr + instr->len > mtd->size)
+ return -EINVAL;
+
+ 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, u_char **mtdbuf)
+static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char **mtdbuf)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
- *mtdbuf = mtd->priv + from;
- *retlen = len;
- return 0;
+ if (from + len > mtd->size)
+ return -EINVAL;
+
+ *mtdbuf = mtd->priv + from;
+ *retlen = len;
+ return 0;
}
-static void ram_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from,
- size_t len)
+static void ram_unpoint(struct mtd_info *mtd, u_char * addr, loff_t from,
+ size_t len)
{
- DEBUG(MTD_DEBUG_LEVEL2, "ram_unpoint\n");
}
static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
+ size_t *retlen, u_char *buf)
{
- DEBUG(MTD_DEBUG_LEVEL2, "ram_read(pos:%ld, len:%ld)\n", (long)from, (long)len);
- if (from + len > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL1, "ram_read() out of bounds (%ld > %ld)\n", (long)(from + len), (long)mtd->size);
- return -EINVAL;
- }
+ if (from + len > mtd->size)
+ return -EINVAL;
- memcpy(buf, mtd->priv + from, len);
+ memcpy(buf, mtd->priv + from, len);
- *retlen=len;
- return 0;
+ *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)
+ size_t *retlen, const u_char *buf)
{
- DEBUG(MTD_DEBUG_LEVEL2, "ram_write(pos:%ld, len:%ld)\n", (long)to, (long)len);
- if (to + len > mtd->size) {
- DEBUG(MTD_DEBUG_LEVEL1, "ram_write() out of bounds (%ld > %ld)\n", (long)(to + len), (long)mtd->size);
- return -EINVAL;
- }
+ if (to + len > mtd->size)
+ return -EINVAL;
- memcpy ((char *)mtd->priv + to, buf, len);
+ memcpy((char *)mtd->priv + to, buf, len);
- *retlen=len;
- return 0;
+ *retlen = len;
+ return 0;
}
static void __exit cleanup_mtdram(void)
{
- if (mtd_info) {
- del_mtd_device(mtd_info);
-#if CONFIG_MTDRAM_TOTAL_SIZE > 0
- if (mtd_info->priv)
-#if CONFIG_MTDRAM_ABS_POS > 0
- iounmap(mtd_info->priv);
-#else
- vfree(mtd_info->priv);
-#endif
-#endif
- kfree(mtd_info);
- }
-}
-
-int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
- unsigned long size, 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->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->read = ram_read;
- mtd->write = ram_write;
-
- if (add_mtd_device(mtd)) {
- return -EIO;
- }
-
- return 0;
-}
-
-#if CONFIG_MTDRAM_TOTAL_SIZE > 0
-#if CONFIG_MTDRAM_ABS_POS > 0
-static int __init init_mtdram(void)
-{
- void *addr;
- int err;
- /* Allocate some memory */
- mtd_info = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
- if (!mtd_info)
- return -ENOMEM;
-
- addr = ioremap(CONFIG_MTDRAM_ABS_POS, MTDRAM_TOTAL_SIZE);
- if (!addr) {
- DEBUG(MTD_DEBUG_LEVEL1,
- "Failed to ioremap) memory region of size %ld at ABS_POS:%ld\n",
- (long)MTDRAM_TOTAL_SIZE, (long)CONFIG_MTDRAM_ABS_POS);
- kfree(mtd_info);
- mtd_info = NULL;
- return -ENOMEM;
- }
- err = mtdram_init_device(mtd_info, addr,
- MTDRAM_TOTAL_SIZE, "mtdram test device");
- if (err)
- {
- iounmap(addr);
- kfree(mtd_info);
- mtd_info = NULL;
- return err;
- }
- memset(mtd_info->priv, 0xff, MTDRAM_TOTAL_SIZE);
- return err;
+ if (mtd_info) {
+ del_mtd_device(mtd_info);
+ if (mtd_info->priv)
+ vfree(mtd_info->priv);
+ kfree(mtd_info);
+ }
}
-#else /* CONFIG_MTDRAM_ABS_POS > 0 */
-
-static int __init init_mtdram(void)
+int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
+ unsigned long size, char *name)
{
- void *addr;
- int err;
- /* Allocate some memory */
- mtd_info = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
- if (!mtd_info)
- return -ENOMEM;
-
- addr = vmalloc(MTDRAM_TOTAL_SIZE);
- if (!addr) {
- DEBUG(MTD_DEBUG_LEVEL1,
- "Failed to vmalloc memory region of size %ld\n",
- (long)MTDRAM_TOTAL_SIZE);
- 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;
+ 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->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->read = ram_read;
+ mtd->write = ram_write;
+
+ if (add_mtd_device(mtd)) {
+ return -EIO;
+ }
+
+ return 0;
}
-#endif /* !(CONFIG_MTDRAM_ABS_POS > 0) */
-
-#else /* CONFIG_MTDRAM_TOTAL_SIZE > 0 */
static int __init init_mtdram(void)
{
- return 0;
+ 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;
}
-#endif /* !(CONFIG_MTDRAM_TOTAL_SIZE > 0) */
module_init(init_mtdram);
module_exit(cleanup_mtdram);
@@ -232,4 +160,3 @@ module_exit(cleanup_mtdram);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexander Larsson <alexl@redhat.com>");
MODULE_DESCRIPTION("Simulated MTD driver for testing");
-
generated by cgit v1.1 at 2024-10-30 12:30:28 +0000