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1275 |
phoenix |
/*
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* $Id: dbox2-flash.c,v 1.1.1.1 2004-04-15 01:51:54 phoenix Exp $
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*
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* Nokia / Sagem D-Box 2 flash driver
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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 <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 <linux/config.h>
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/* partition_info gives details on the logical partitions that the split the
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* single flash device into. If the size if zero we use up to the end of the
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* device. */
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static struct mtd_partition partition_info[]= {{name: "BR bootloader", // raw
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size: 128 * 1024,
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offset: 0,
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mask_flags: MTD_WRITEABLE},
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{name: "PPC bootloader", // flfs
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size: 128 * 1024,
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offset: MTDPART_OFS_APPEND,
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mask_flags: 0},
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{name: "Kernel", // idxfs
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size: 768 * 1024,
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offset: MTDPART_OFS_APPEND,
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mask_flags: 0},
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{name: "System", // jffs
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size: MTDPART_SIZ_FULL,
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offset: MTDPART_OFS_APPEND,
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mask_flags: 0}};
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#define NUM_PARTITIONS (sizeof(partition_info) / sizeof(partition_info[0]))
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#define WINDOW_ADDR 0x10000000
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#define WINDOW_SIZE 0x800000
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static struct mtd_info *mymtd;
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__u8 dbox2_flash_read8(struct map_info *map, unsigned long ofs)
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{
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return __raw_readb(map->map_priv_1 + ofs);
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}
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__u16 dbox2_flash_read16(struct map_info *map, unsigned long ofs)
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{
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return __raw_readw(map->map_priv_1 + ofs);
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}
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__u32 dbox2_flash_read32(struct map_info *map, unsigned long ofs)
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{
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return __raw_readl(map->map_priv_1 + ofs);
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}
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void dbox2_flash_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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memcpy_fromio(to, map->map_priv_1 + from, len);
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}
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void dbox2_flash_write8(struct map_info *map, __u8 d, unsigned long adr)
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{
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__raw_writeb(d, map->map_priv_1 + adr);
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mb();
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}
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void dbox2_flash_write16(struct map_info *map, __u16 d, unsigned long adr)
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{
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__raw_writew(d, map->map_priv_1 + adr);
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mb();
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}
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void dbox2_flash_write32(struct map_info *map, __u32 d, unsigned long adr)
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{
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__raw_writel(d, map->map_priv_1 + adr);
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mb();
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}
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void dbox2_flash_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
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{
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memcpy_toio(map->map_priv_1 + to, from, len);
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}
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struct map_info dbox2_flash_map = {
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name: "D-Box 2 flash memory",
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size: WINDOW_SIZE,
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buswidth: 4,
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read8: dbox2_flash_read8,
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read16: dbox2_flash_read16,
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read32: dbox2_flash_read32,
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copy_from: dbox2_flash_copy_from,
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write8: dbox2_flash_write8,
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write16: dbox2_flash_write16,
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write32: dbox2_flash_write32,
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copy_to: dbox2_flash_copy_to
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};
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int __init init_dbox2_flash(void)
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{
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printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
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dbox2_flash_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
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if (!dbox2_flash_map.map_priv_1) {
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printk("Failed to ioremap\n");
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return -EIO;
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}
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// Probe for dual Intel 28F320 or dual AMD
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mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
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if (!mymtd) {
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// Probe for single Intel 28F640
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dbox2_flash_map.buswidth = 2;
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mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
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}
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if (mymtd) {
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mymtd->module = THIS_MODULE;
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/* Create MTD devices for each partition. */
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add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
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return 0;
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}
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iounmap((void *)dbox2_flash_map.map_priv_1);
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return -ENXIO;
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}
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static void __exit cleanup_dbox2_flash(void)
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{
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if (mymtd) {
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del_mtd_partitions(mymtd);
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map_destroy(mymtd);
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}
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if (dbox2_flash_map.map_priv_1) {
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iounmap((void *)dbox2_flash_map.map_priv_1);
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dbox2_flash_map.map_priv_1 = 0;
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}
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}
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module_init(init_dbox2_flash);
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module_exit(cleanup_dbox2_flash);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Kári Davíđsson <kd@flaga.is>");
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MODULE_DESCRIPTION("MTD map driver for Nokia/Sagem D-Box 2 board");
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