mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 06:21:34 +07:00
d4906688d4
mtd_partition are not supposed to change at runtime. Functions 'mtd_device_parse_register' working with const mtd_partition provided by <linux/mtd/mtd.h>. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Richard Weinberger <richard@nod.at>
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board
|
|
*
|
|
* Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com)
|
|
* based on sc520cdp.c by Sysgo Real-Time Solutions GmbH
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*
|
|
* The NetSc520 is a demonstration board for the Elan Sc520 processor available
|
|
* from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another
|
|
* 16 megs of SDRAM.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <asm/io.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
|
|
/*
|
|
** The single, 16 megabyte flash bank is divided into four virtual
|
|
** partitions. The first partition is 768 KiB and is intended to
|
|
** store the kernel image loaded by the bootstrap loader. The second
|
|
** partition is 256 KiB and holds the BIOS image. The third
|
|
** partition is 14.5 MiB and is intended for the flash file system
|
|
** image. The last partition is 512 KiB and contains another copy
|
|
** of the BIOS image and the reset vector.
|
|
**
|
|
** Only the third partition should be mounted. The first partition
|
|
** should not be mounted, but it can erased and written to using the
|
|
** MTD character routines. The second and fourth partitions should
|
|
** not be touched - it is possible to corrupt the BIOS image by
|
|
** mounting these partitions, and potentially the board will not be
|
|
** recoverable afterwards.
|
|
*/
|
|
|
|
/* partition_info gives details on the logical partitions that the split the
|
|
* single flash device into. If the size if zero we use up to the end of the
|
|
* device. */
|
|
static const struct mtd_partition partition_info[] = {
|
|
{
|
|
.name = "NetSc520 boot kernel",
|
|
.offset = 0,
|
|
.size = 0xc0000
|
|
},
|
|
{
|
|
.name = "NetSc520 Low BIOS",
|
|
.offset = 0xc0000,
|
|
.size = 0x40000
|
|
},
|
|
{
|
|
.name = "NetSc520 file system",
|
|
.offset = 0x100000,
|
|
.size = 0xe80000
|
|
},
|
|
{
|
|
.name = "NetSc520 High BIOS",
|
|
.offset = 0xf80000,
|
|
.size = 0x80000
|
|
},
|
|
};
|
|
#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
|
|
|
|
#define WINDOW_SIZE 0x00100000
|
|
#define WINDOW_ADDR 0x00200000
|
|
|
|
static struct map_info netsc520_map = {
|
|
.name = "netsc520 Flash Bank",
|
|
.size = WINDOW_SIZE,
|
|
.bankwidth = 4,
|
|
.phys = WINDOW_ADDR,
|
|
};
|
|
|
|
#define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map)
|
|
|
|
static struct mtd_info *mymtd;
|
|
|
|
static int __init init_netsc520(void)
|
|
{
|
|
printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n",
|
|
(unsigned long long)netsc520_map.size,
|
|
(unsigned long long)netsc520_map.phys);
|
|
netsc520_map.virt = ioremap_nocache(netsc520_map.phys, netsc520_map.size);
|
|
|
|
if (!netsc520_map.virt) {
|
|
printk("Failed to ioremap_nocache\n");
|
|
return -EIO;
|
|
}
|
|
|
|
simple_map_init(&netsc520_map);
|
|
|
|
mymtd = do_map_probe("cfi_probe", &netsc520_map);
|
|
if(!mymtd)
|
|
mymtd = do_map_probe("map_ram", &netsc520_map);
|
|
if(!mymtd)
|
|
mymtd = do_map_probe("map_rom", &netsc520_map);
|
|
|
|
if (!mymtd) {
|
|
iounmap(netsc520_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
|
|
mymtd->owner = THIS_MODULE;
|
|
mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit cleanup_netsc520(void)
|
|
{
|
|
if (mymtd) {
|
|
mtd_device_unregister(mymtd);
|
|
map_destroy(mymtd);
|
|
}
|
|
if (netsc520_map.virt) {
|
|
iounmap(netsc520_map.virt);
|
|
netsc520_map.virt = NULL;
|
|
}
|
|
}
|
|
|
|
module_init(init_netsc520);
|
|
module_exit(cleanup_netsc520);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>");
|
|
MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board");
|