diff options
Diffstat (limited to 'drivers/mtd/maps/redwood.c')
| -rw-r--r-- | drivers/mtd/maps/redwood.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/drivers/mtd/maps/redwood.c b/drivers/mtd/maps/redwood.c new file mode 100644 index 0000000..edd01ee --- /dev/null +++ b/drivers/mtd/maps/redwood.c @@ -0,0 +1,169 @@ +/* + * $Id: redwood.c,v 1.10 2004/11/04 13:24:15 gleixner Exp $ + * + * drivers/mtd/maps/redwood.c + * + * FLASH map for the IBM Redwood 4/5/6 boards. + * + * Author: MontaVista Software, Inc. <source@mvista.com> + * + * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under + * the terms of the GNU General Public License version 2. This program + * is licensed "as is" without any warranty of any kind, whether express + * or implied. + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/io.h> + +#if !defined (CONFIG_REDWOOD_6) + +#define WINDOW_ADDR 0xffc00000 +#define WINDOW_SIZE 0x00400000 + +#define RW_PART0_OF 0 +#define RW_PART0_SZ 0x10000 +#define RW_PART1_OF RW_PART0_SZ +#define RW_PART1_SZ 0x200000 - 0x10000 +#define RW_PART2_OF 0x200000 +#define RW_PART2_SZ 0x10000 +#define RW_PART3_OF 0x210000 +#define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000) +#define RW_PART4_OF 0x3e0000 +#define RW_PART4_SZ 0x20000 + +static struct mtd_partition redwood_flash_partitions[] = { + { + .name = "Redwood OpenBIOS Vital Product Data", + .offset = RW_PART0_OF, + .size = RW_PART0_SZ, + .mask_flags = MTD_WRITEABLE /* force read-only */ + }, + { + .name = "Redwood kernel", + .offset = RW_PART1_OF, + .size = RW_PART1_SZ + }, + { + .name = "Redwood OpenBIOS non-volatile storage", + .offset = RW_PART2_OF, + .size = RW_PART2_SZ, + .mask_flags = MTD_WRITEABLE /* force read-only */ + }, + { + .name = "Redwood filesystem", + .offset = RW_PART3_OF, + .size = RW_PART3_SZ + }, + { + .name = "Redwood OpenBIOS", + .offset = RW_PART4_OF, + .size = RW_PART4_SZ, + .mask_flags = MTD_WRITEABLE /* force read-only */ + } +}; + +#else /* CONFIG_REDWOOD_6 */ +/* FIXME: the window is bigger - armin */ +#define WINDOW_ADDR 0xff800000 +#define WINDOW_SIZE 0x00800000 + +#define RW_PART0_OF 0 +#define RW_PART0_SZ 0x400000 /* 4 MiB data */ +#define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ +#define RW_PART1_SZ 0x10000 /* 64K VPD */ +#define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ +#define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000) +#define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ +#define RW_PART3_SZ 0x20000 + +static struct mtd_partition redwood_flash_partitions[] = { + { + .name = "Redwood filesystem", + .offset = RW_PART0_OF, + .size = RW_PART0_SZ + }, + { + .name = "Redwood OpenBIOS Vital Product Data", + .offset = RW_PART1_OF, + .size = RW_PART1_SZ, + .mask_flags = MTD_WRITEABLE /* force read-only */ + }, + { + .name = "Redwood kernel", + .offset = RW_PART2_OF, + .size = RW_PART2_SZ + }, + { + .name = "Redwood OpenBIOS", + .offset = RW_PART3_OF, + .size = RW_PART3_SZ, + .mask_flags = MTD_WRITEABLE /* force read-only */ + } +}; + +#endif /* CONFIG_REDWOOD_6 */ + +struct map_info redwood_flash_map = { + .name = "IBM Redwood", + .size = WINDOW_SIZE, + .bankwidth = 2, + .phys = WINDOW_ADDR, +}; + + +#define NUM_REDWOOD_FLASH_PARTITIONS \ + (sizeof(redwood_flash_partitions)/sizeof(redwood_flash_partitions[0])) + +static struct mtd_info *redwood_mtd; + +int __init init_redwood_flash(void) +{ + printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n", + WINDOW_SIZE, WINDOW_ADDR); + + redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); + + if (!redwood_flash_map.virt) { + printk("init_redwood_flash: failed to ioremap\n"); + return -EIO; + } + simple_map_init(&redwood_flash_map); + + redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map); + + if (redwood_mtd) { + redwood_mtd->owner = THIS_MODULE; + return add_mtd_partitions(redwood_mtd, + redwood_flash_partitions, + NUM_REDWOOD_FLASH_PARTITIONS); + } + + return -ENXIO; +} + +static void __exit cleanup_redwood_flash(void) +{ + if (redwood_mtd) { + del_mtd_partitions(redwood_mtd); + /* moved iounmap after map_destroy - armin */ + map_destroy(redwood_mtd); + iounmap((void *)redwood_flash_map.virt); + } +} + +module_init(init_redwood_flash); +module_exit(cleanup_redwood_flash); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("MontaVista Software <source@mvista.com>"); +MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards"); |