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Commit c13cbf3b authored by Joern Engel's avatar Joern Engel Committed by Thomas Gleixner
Browse files

[MTD] mtdram: Quick cleanup of the driver: 



- Lindent
- Removal of slram/phram functionality
- Removal of most #ifdefs

Signed-off-by: default avatarJoern Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 7d200960

drivers/mtd/devices/mtdram.c

+96 −169
Original line number Diff line number Diff line 
/*

 * 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

 *
@@ -18,41 +19,25 @@ 
#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;

#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");

#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





// 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);

	if (instr->addr + instr->len > mtd->size)

		return -EINVAL;

  }



	memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
@@ -62,7 +47,8 @@ ram_erase(struct mtd_info *mtd, struct erase_info *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;
@@ -75,17 +61,13 @@ static int ram_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *ret 
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)

{

  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);

	if (from + len > mtd->size)

		return -EINVAL;

  }



	memcpy(buf, mtd->priv + from, len);
@@ -96,11 +78,8 @@ static int ram_read(struct mtd_info *mtd, loff_t from, size_t len, 
static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,

		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);

	if (to + len > mtd->size)

		return -EINVAL;

  }



	memcpy((char *)mtd->priv + to, buf, len);
@@ -112,14 +91,8 @@ 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);

	}

}
@@ -151,45 +124,14 @@ int mtdram_init_device(struct mtd_info *mtd, void *mapped_address, 
	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;

}



#else /* CONFIG_MTDRAM_ABS_POS > 0 */

	if (!total_size)

		return -EINVAL;



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)
@@ -197,17 +139,12 @@ static int __init init_mtdram(void) 


	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) 

  {

	err = mtdram_init_device(mtd_info, addr, MTDRAM_TOTAL_SIZE, "mtdram test device");

	if (err) {

		vfree(addr);

		kfree(mtd_info);

		mtd_info = NULL;
@@ -216,15 +153,6 @@ static int __init init_mtdram(void) 
	memset(mtd_info->priv, 0xff, MTDRAM_TOTAL_SIZE);

	return err;

}

#endif /* !(CONFIG_MTDRAM_ABS_POS > 0) */



#else /* CONFIG_MTDRAM_TOTAL_SIZE > 0 */



static int __init init_mtdram(void)

{

  return 0;

}

#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");