dbox2-flash.c
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上传日期:2013-04-10
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- /*
- * $Id: dbox2-flash.c,v 1.4 2001/10/02 15:05:14 dwmw2 Exp $
- *
- * Nokia / Sagem D-Box 2 flash driver
- */
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <asm/io.h>
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/map.h>
- #include <linux/mtd/partitions.h>
- #include <linux/config.h>
- /* partition_info gives details on the logical partitions that the split the
- * single flash device into. If the size if zero we use up to the end of the
- * device. */
- static struct mtd_partition partition_info[]= {{name: "BR bootloader", // raw
- size: 128 * 1024,
- offset: 0,
- mask_flags: MTD_WRITEABLE},
- {name: "PPC bootloader", // flfs
- size: 128 * 1024,
- offset: MTDPART_OFS_APPEND,
- mask_flags: 0},
- {name: "Kernel", // idxfs
- size: 768 * 1024,
- offset: MTDPART_OFS_APPEND,
- mask_flags: 0},
- {name: "System", // jffs
- size: MTDPART_SIZ_FULL,
- offset: MTDPART_OFS_APPEND,
- mask_flags: 0}};
- #define NUM_PARTITIONS (sizeof(partition_info) / sizeof(partition_info[0]))
- #define WINDOW_ADDR 0x10000000
- #define WINDOW_SIZE 0x800000
- static struct mtd_info *mymtd;
- __u8 dbox2_flash_read8(struct map_info *map, unsigned long ofs)
- {
- return __raw_readb(map->map_priv_1 + ofs);
- }
- __u16 dbox2_flash_read16(struct map_info *map, unsigned long ofs)
- {
- return __raw_readw(map->map_priv_1 + ofs);
- }
- __u32 dbox2_flash_read32(struct map_info *map, unsigned long ofs)
- {
- return __raw_readl(map->map_priv_1 + ofs);
- }
- void dbox2_flash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
- {
- memcpy_fromio(to, map->map_priv_1 + from, len);
- }
- void dbox2_flash_write8(struct map_info *map, __u8 d, unsigned long adr)
- {
- __raw_writeb(d, map->map_priv_1 + adr);
- mb();
- }
- void dbox2_flash_write16(struct map_info *map, __u16 d, unsigned long adr)
- {
- __raw_writew(d, map->map_priv_1 + adr);
- mb();
- }
- void dbox2_flash_write32(struct map_info *map, __u32 d, unsigned long adr)
- {
- __raw_writel(d, map->map_priv_1 + adr);
- mb();
- }
- void dbox2_flash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
- {
- memcpy_toio(map->map_priv_1 + to, from, len);
- }
- struct map_info dbox2_flash_map = {
- name: "D-Box 2 flash memory",
- size: WINDOW_SIZE,
- buswidth: 4,
- read8: dbox2_flash_read8,
- read16: dbox2_flash_read16,
- read32: dbox2_flash_read32,
- copy_from: dbox2_flash_copy_from,
- write8: dbox2_flash_write8,
- write16: dbox2_flash_write16,
- write32: dbox2_flash_write32,
- copy_to: dbox2_flash_copy_to
- };
- int __init init_dbox2_flash(void)
- {
- printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)n", WINDOW_SIZE, WINDOW_ADDR);
- dbox2_flash_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
- if (!dbox2_flash_map.map_priv_1) {
- printk("Failed to ioremapn");
- return -EIO;
- }
- // Probe for dual Intel 28F320 or dual AMD
- mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
- if (!mymtd) {
- // Probe for single Intel 28F640
- dbox2_flash_map.buswidth = 2;
-
- mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
- }
-
- if (mymtd) {
- mymtd->module = THIS_MODULE;
- /* Create MTD devices for each partition. */
- add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
-
- return 0;
- }
- iounmap((void *)dbox2_flash_map.map_priv_1);
- return -ENXIO;
- }
- static void __exit cleanup_dbox2_flash(void)
- {
- if (mymtd) {
- del_mtd_partitions(mymtd);
- map_destroy(mymtd);
- }
- if (dbox2_flash_map.map_priv_1) {
- iounmap((void *)dbox2_flash_map.map_priv_1);
- dbox2_flash_map.map_priv_1 = 0;
- }
- }
- module_init(init_dbox2_flash);
- module_exit(cleanup_dbox2_flash);
- MODULE_LICENSE("GPL");
- MODULE_AUTHOR("K醨i Dav眇sson <kd@flaga.is>");
- MODULE_DESCRIPTION("MTD map driver for Nokia/Sagem D-Box 2 board");