104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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* Flash device on Lasat 100 and 200 boards
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*
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* (C) 2002 Brian Murphy <brian@murphy.dk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* $Id: lasat.c,v 1.9 2004/11/04 13:24:15 gleixner Exp $
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*
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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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#include <asm/lasat/lasat.h>
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static struct mtd_info *lasat_mtd;
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static struct mtd_partition partition_info[LASAT_MTD_LAST];
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static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};
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static void lasat_set_vpp(struct map_info *map, int vpp)
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{
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if (vpp)
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*lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;
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else
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*lasat_misc->flash_wp_reg &= ~(1 << lasat_misc->flash_wp_bit);
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}
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static struct map_info lasat_map = {
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.name = "LASAT flash",
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.bankwidth = 4,
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.set_vpp = lasat_set_vpp
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};
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static int __init init_lasat(void)
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{
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int i;
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/* since we use AMD chips and set_vpp is not implimented
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* for these (yet) we still have to permanently enable flash write */
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printk(KERN_NOTICE "Unprotecting flash\n");
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ENABLE_VPP((&lasat_map));
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lasat_map.phys = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);
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lasat_map.virt = ioremap_nocache(
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lasat_map.phys, lasat_board_info.li_flash_size);
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lasat_map.size = lasat_board_info.li_flash_size;
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simple_map_init(&lasat_map);
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for (i=0; i < LASAT_MTD_LAST; i++)
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partition_info[i].name = lasat_mtd_partnames[i];
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lasat_mtd = do_map_probe("cfi_probe", &lasat_map);
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if (!lasat_mtd)
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lasat_mtd = do_map_probe("jedec_probe", &lasat_map);
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if (lasat_mtd) {
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u32 size, offset = 0;
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lasat_mtd->owner = THIS_MODULE;
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for (i=0; i < LASAT_MTD_LAST; i++) {
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size = lasat_flash_partition_size(i);
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partition_info[i].size = size;
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partition_info[i].offset = offset;
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offset += size;
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}
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add_mtd_partitions( lasat_mtd, partition_info, LASAT_MTD_LAST );
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return 0;
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}
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iounmap(lasat_map.virt);
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return -ENXIO;
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}
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static void __exit cleanup_lasat(void)
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{
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if (lasat_mtd) {
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del_mtd_partitions(lasat_mtd);
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map_destroy(lasat_mtd);
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}
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if (lasat_map.virt) {
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iounmap(lasat_map.virt);
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lasat_map.virt = 0;
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}
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}
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module_init(init_lasat);
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module_exit(cleanup_lasat);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");
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MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");
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