diff options
Diffstat (limited to 'drivers/mtd/maps/lubbock-flash.c')
| -rw-r--r-- | drivers/mtd/maps/lubbock-flash.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/mtd/maps/lubbock-flash.c b/drivers/mtd/maps/lubbock-flash.c new file mode 100644 index 00000000000..1298de475c9 --- /dev/null +++ b/drivers/mtd/maps/lubbock-flash.c @@ -0,0 +1,168 @@ +/* + * $Id: lubbock-flash.c,v 1.19 2004/11/04 13:24:15 gleixner Exp $ + * + * Map driver for the Lubbock developer platform. + * + * Author: Nicolas Pitre + * Copyright: (C) 2001 MontaVista Software Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/dma-mapping.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> +#include <asm/io.h> +#include <asm/hardware.h> +#include <asm/arch/pxa-regs.h> +#include <asm/arch/lubbock.h> + + +#define ROM_ADDR 0x00000000 +#define FLASH_ADDR 0x04000000 + +#define WINDOW_SIZE 64*1024*1024 + +static void lubbock_map_inval_cache(struct map_info *map, unsigned long from, ssize_t len) +{ + consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE); +} + +static struct map_info lubbock_maps[2] = { { + .size = WINDOW_SIZE, + .phys = 0x00000000, + .inval_cache = lubbock_map_inval_cache, +}, { + .size = WINDOW_SIZE, + .phys = 0x04000000, + .inval_cache = lubbock_map_inval_cache, +} }; + +static struct mtd_partition lubbock_partitions[] = { + { + .name = "Bootloader", + .size = 0x00040000, + .offset = 0, + .mask_flags = MTD_WRITEABLE /* force read-only */ + },{ + .name = "Kernel", + .size = 0x00100000, + .offset = 0x00040000, + },{ + .name = "Filesystem", + .size = MTDPART_SIZ_FULL, + .offset = 0x00140000 + } +}; + +static struct mtd_info *mymtds[2]; +static struct mtd_partition *parsed_parts[2]; +static int nr_parsed_parts[2]; + +static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; + +static int __init init_lubbock(void) +{ + int flashboot = (LUB_CONF_SWITCHES & 1); + int ret = 0, i; + + lubbock_maps[0].bankwidth = lubbock_maps[1].bankwidth = + (BOOT_DEF & 1) ? 2 : 4; + + /* Compensate for the nROMBT switch which swaps the flash banks */ + printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n", + flashboot?"Flash":"ROM", flashboot); + + lubbock_maps[flashboot^1].name = "Lubbock Application Flash"; + lubbock_maps[flashboot].name = "Lubbock Boot ROM"; + + for (i = 0; i < 2; i++) { + lubbock_maps[i].virt = ioremap(lubbock_maps[i].phys, WINDOW_SIZE); + if (!lubbock_maps[i].virt) { + printk(KERN_WARNING "Failed to ioremap %s\n", lubbock_maps[i].name); + if (!ret) + ret = -ENOMEM; + continue; + } + lubbock_maps[i].cached = ioremap_cached(lubbock_maps[i].phys, WINDOW_SIZE); + if (!lubbock_maps[i].cached) + printk(KERN_WARNING "Failed to ioremap cached %s\n", lubbock_maps[i].name); + simple_map_init(&lubbock_maps[i]); + + printk(KERN_NOTICE "Probing %s at physical address 0x%08lx (%d-bit bankwidth)\n", + lubbock_maps[i].name, lubbock_maps[i].phys, + lubbock_maps[i].bankwidth * 8); + + mymtds[i] = do_map_probe("cfi_probe", &lubbock_maps[i]); + + if (!mymtds[i]) { + iounmap((void *)lubbock_maps[i].virt); + if (lubbock_maps[i].cached) + iounmap(lubbock_maps[i].cached); + if (!ret) + ret = -EIO; + continue; + } + mymtds[i]->owner = THIS_MODULE; + + ret = parse_mtd_partitions(mymtds[i], probes, + &parsed_parts[i], 0); + + if (ret > 0) + nr_parsed_parts[i] = ret; + } + + if (!mymtds[0] && !mymtds[1]) + return ret; + + for (i = 0; i < 2; i++) { + if (!mymtds[i]) { + printk(KERN_WARNING "%s is absent. Skipping\n", lubbock_maps[i].name); + } else if (nr_parsed_parts[i]) { + add_mtd_partitions(mymtds[i], parsed_parts[i], nr_parsed_parts[i]); + } else if (!i) { + printk("Using static partitions on %s\n", lubbock_maps[i].name); + add_mtd_partitions(mymtds[i], lubbock_partitions, ARRAY_SIZE(lubbock_partitions)); + } else { + printk("Registering %s as whole device\n", lubbock_maps[i].name); + add_mtd_device(mymtds[i]); + } + } + return 0; +} + +static void __exit cleanup_lubbock(void) +{ + int i; + for (i = 0; i < 2; i++) { + if (!mymtds[i]) + continue; + + if (nr_parsed_parts[i] || !i) + del_mtd_partitions(mymtds[i]); + else + del_mtd_device(mymtds[i]); + + map_destroy(mymtds[i]); + iounmap((void *)lubbock_maps[i].virt); + if (lubbock_maps[i].cached) + iounmap(lubbock_maps[i].cached); + + if (parsed_parts[i]) + kfree(parsed_parts[i]); + } +} + +module_init(init_lubbock); +module_exit(cleanup_lubbock); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); +MODULE_DESCRIPTION("MTD map driver for Intel Lubbock"); |