175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
/*
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* drivers/mtd/maps/redwood.c
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*
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* FLASH map for the IBM Redwood 4/5/6 boards.
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*
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* Author: MontaVista Software, Inc. <source@mvista.com>
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*
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* 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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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 <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/io.h>
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#if !defined (CONFIG_REDWOOD_6)
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#define WINDOW_ADDR 0xffc00000
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#define WINDOW_SIZE 0x00400000
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#define RW_PART0_OF 0
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#define RW_PART0_SZ 0x10000
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#define RW_PART1_OF RW_PART0_SZ
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#define RW_PART1_SZ 0x200000 - 0x10000
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#define RW_PART2_OF 0x200000
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#define RW_PART2_SZ 0x10000
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#define RW_PART3_OF 0x210000
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#define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000)
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#define RW_PART4_OF 0x3e0000
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#define RW_PART4_SZ 0x20000
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static struct mtd_partition redwood_flash_partitions[] = {
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{
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.name = "Redwood OpenBIOS Vital Product Data",
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.offset = RW_PART0_OF,
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.size = RW_PART0_SZ,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},
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{
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.name = "Redwood kernel",
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.offset = RW_PART1_OF,
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.size = RW_PART1_SZ
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},
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{
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.name = "Redwood OpenBIOS non-volatile storage",
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.offset = RW_PART2_OF,
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.size = RW_PART2_SZ,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},
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{
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.name = "Redwood filesystem",
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.offset = RW_PART3_OF,
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.size = RW_PART3_SZ
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},
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{
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.name = "Redwood OpenBIOS",
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.offset = RW_PART4_OF,
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.size = RW_PART4_SZ,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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}
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};
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#else /* CONFIG_REDWOOD_6 */
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/* FIXME: the window is bigger - armin */
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#define WINDOW_ADDR 0xff800000
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#define WINDOW_SIZE 0x00800000
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#define RW_PART0_OF 0
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#define RW_PART0_SZ 0x400000 /* 4 MiB data */
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#define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ
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#define RW_PART1_SZ 0x10000 /* 64K VPD */
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#define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ
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#define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000)
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#define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ
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#define RW_PART3_SZ 0x20000
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static struct mtd_partition redwood_flash_partitions[] = {
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{
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.name = "Redwood filesystem",
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.offset = RW_PART0_OF,
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.size = RW_PART0_SZ
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},
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{
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.name = "Redwood OpenBIOS Vital Product Data",
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.offset = RW_PART1_OF,
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.size = RW_PART1_SZ,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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},
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{
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.name = "Redwood kernel",
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.offset = RW_PART2_OF,
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.size = RW_PART2_SZ
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},
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{
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.name = "Redwood OpenBIOS",
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.offset = RW_PART3_OF,
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.size = RW_PART3_SZ,
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.mask_flags = MTD_WRITEABLE /* force read-only */
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}
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};
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#endif /* CONFIG_REDWOOD_6 */
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struct map_info redwood_flash_map = {
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.name = "IBM Redwood",
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.size = WINDOW_SIZE,
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.bankwidth = 2,
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.phys = WINDOW_ADDR,
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};
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#define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
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static struct mtd_info *redwood_mtd;
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static int __init init_redwood_flash(void)
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{
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int err;
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printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
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WINDOW_SIZE, WINDOW_ADDR);
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redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
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if (!redwood_flash_map.virt) {
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printk("init_redwood_flash: failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&redwood_flash_map);
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redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
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if (redwood_mtd) {
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redwood_mtd->owner = THIS_MODULE;
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err = add_mtd_partitions(redwood_mtd,
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redwood_flash_partitions,
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NUM_REDWOOD_FLASH_PARTITIONS);
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if (err) {
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printk("init_redwood_flash: add_mtd_partitions failed\n");
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iounmap(redwood_flash_map.virt);
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}
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return err;
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}
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iounmap(redwood_flash_map.virt);
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return -ENXIO;
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}
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static void __exit cleanup_redwood_flash(void)
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{
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if (redwood_mtd) {
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del_mtd_partitions(redwood_mtd);
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/* moved iounmap after map_destroy - armin */
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map_destroy(redwood_mtd);
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iounmap((void *)redwood_flash_map.virt);
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}
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}
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module_init(init_redwood_flash);
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module_exit(cleanup_redwood_flash);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
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MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");
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