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127 lines
3.4 KiB
127 lines
3.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board |
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* |
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* Copyright (C) 2001 Mark Langsdorf ([email protected]) |
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* based on sc520cdp.c by Sysgo Real-Time Solutions GmbH |
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* |
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* The NetSc520 is a demonstration board for the Elan Sc520 processor available |
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* from AMD. It has a single back of 16 megs of 32-bit Flash ROM and another |
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* 16 megs of SDRAM. |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <asm/io.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/map.h> |
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#include <linux/mtd/partitions.h> |
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/* |
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** The single, 16 megabyte flash bank is divided into four virtual |
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** partitions. The first partition is 768 KiB and is intended to |
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** store the kernel image loaded by the bootstrap loader. The second |
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** partition is 256 KiB and holds the BIOS image. The third |
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** partition is 14.5 MiB and is intended for the flash file system |
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** image. The last partition is 512 KiB and contains another copy |
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** of the BIOS image and the reset vector. |
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** |
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** Only the third partition should be mounted. The first partition |
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** should not be mounted, but it can erased and written to using the |
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** MTD character routines. The second and fourth partitions should |
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** not be touched - it is possible to corrupt the BIOS image by |
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** mounting these partitions, and potentially the board will not be |
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** recoverable afterwards. |
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*/ |
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/* partition_info gives details on the logical partitions that the split the |
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* single flash device into. If the size if zero we use up to the end of the |
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* device. */ |
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static const struct mtd_partition partition_info[] = { |
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{ |
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.name = "NetSc520 boot kernel", |
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.offset = 0, |
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.size = 0xc0000 |
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}, |
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{ |
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.name = "NetSc520 Low BIOS", |
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.offset = 0xc0000, |
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.size = 0x40000 |
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}, |
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{ |
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.name = "NetSc520 file system", |
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.offset = 0x100000, |
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.size = 0xe80000 |
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}, |
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{ |
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.name = "NetSc520 High BIOS", |
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.offset = 0xf80000, |
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.size = 0x80000 |
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}, |
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}; |
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#define NUM_PARTITIONS ARRAY_SIZE(partition_info) |
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#define WINDOW_SIZE 0x00100000 |
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#define WINDOW_ADDR 0x00200000 |
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static struct map_info netsc520_map = { |
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.name = "netsc520 Flash Bank", |
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.size = WINDOW_SIZE, |
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.bankwidth = 4, |
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.phys = WINDOW_ADDR, |
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}; |
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#define NUM_FLASH_BANKS ARRAY_SIZE(netsc520_map) |
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static struct mtd_info *mymtd; |
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static int __init init_netsc520(void) |
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{ |
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printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n", |
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(unsigned long long)netsc520_map.size, |
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(unsigned long long)netsc520_map.phys); |
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netsc520_map.virt = ioremap(netsc520_map.phys, netsc520_map.size); |
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if (!netsc520_map.virt) { |
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printk("Failed to ioremap\n"); |
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return -EIO; |
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} |
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simple_map_init(&netsc520_map); |
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mymtd = do_map_probe("cfi_probe", &netsc520_map); |
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if(!mymtd) |
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mymtd = do_map_probe("map_ram", &netsc520_map); |
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if(!mymtd) |
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mymtd = do_map_probe("map_rom", &netsc520_map); |
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if (!mymtd) { |
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iounmap(netsc520_map.virt); |
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return -ENXIO; |
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} |
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mymtd->owner = THIS_MODULE; |
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mtd_device_register(mymtd, partition_info, NUM_PARTITIONS); |
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return 0; |
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} |
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static void __exit cleanup_netsc520(void) |
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{ |
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if (mymtd) { |
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mtd_device_unregister(mymtd); |
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map_destroy(mymtd); |
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} |
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if (netsc520_map.virt) { |
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iounmap(netsc520_map.virt); |
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netsc520_map.virt = NULL; |
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} |
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} |
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module_init(init_netsc520); |
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module_exit(cleanup_netsc520); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("Mark Langsdorf <[email protected]>"); |
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MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board");
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