mirror of https://gitee.com/openkylin/linux.git
124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
/*
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* 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 <linux/init.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/errno.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[]= {
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{
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.name = "BR bootloader",
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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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},
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{
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.name = "FLFS (U-Boot)",
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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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},
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{
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.name = "Root (SquashFS)",
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.size = 7040 * 1024,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = 0
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},
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{
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.name = "var (JFFS2)",
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.size = 896 * 1024,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = 0
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},
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{
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.name = "Flash without bootloader",
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.size = MTDPART_SIZ_FULL,
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.offset = 128 * 1024,
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.mask_flags = 0
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},
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{
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.name = "Complete Flash",
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.size = MTDPART_SIZ_FULL,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE
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}
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};
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#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
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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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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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.bankwidth = 4,
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.phys = WINDOW_ADDR,
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};
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static 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.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
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if (!dbox2_flash_map.virt) {
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printk("Failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&dbox2_flash_map);
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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.bankwidth = 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->owner = THIS_MODULE;
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/* Create MTD devices for each partition. */
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mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
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return 0;
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}
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iounmap((void *)dbox2_flash_map.virt);
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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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mtd_device_unregister(mymtd);
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map_destroy(mymtd);
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}
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if (dbox2_flash_map.virt) {
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iounmap((void *)dbox2_flash_map.virt);
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dbox2_flash_map.virt = 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 Davíðsson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
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MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");
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