1/*
  2 * D-Box 2 flash driver
  3 */
  4
  5#include <linux/module.h>
  6#include <linux/types.h>
  7#include <linux/kernel.h>
  8#include <linux/init.h>
  9#include <asm/io.h>
 10#include <linux/mtd/mtd.h>
 11#include <linux/mtd/map.h>
 12#include <linux/mtd/partitions.h>
 13#include <linux/errno.h>
 14
 15/* partition_info gives details on the logical partitions that the split the
 16 * single flash device into. If the size if zero we use up to the end of the
 17 * device. */
 18static struct mtd_partition partition_info[]= {
 19	{
 20	.name		= "BR bootloader",
 21	.size		= 128 * 1024,
 22	.offset		= 0,
 23	.mask_flags	= MTD_WRITEABLE
 24	},
 25	{
 26	.name		= "FLFS (U-Boot)",
 27	.size		= 128 * 1024,
 28	.offset		= MTDPART_OFS_APPEND,
 29	.mask_flags	= 0
 30	},
 31	{
 32	.name		= "Root (SquashFS)",
 33	.size		= 7040 * 1024,
 34	.offset		= MTDPART_OFS_APPEND,
 35	.mask_flags	= 0
 36	},
 37	{
 38	.name		= "var (JFFS2)",
 39	.size		= 896 * 1024,
 40	.offset		= MTDPART_OFS_APPEND,
 41	.mask_flags	= 0
 42	},
 43	{
 44	.name		= "Flash without bootloader",
 45	.size		= MTDPART_SIZ_FULL,
 46	.offset		= 128 * 1024,
 47	.mask_flags	= 0
 48	},
 49	{
 50	.name		= "Complete Flash",
 51	.size		= MTDPART_SIZ_FULL,
 52	.offset		= 0,
 53	.mask_flags	= MTD_WRITEABLE
 54	}
 55};
 56
 57#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
 58
 59#define WINDOW_ADDR 0x10000000
 60#define WINDOW_SIZE 0x800000
 61
 62static struct mtd_info *mymtd;
 63
 64
 65struct map_info dbox2_flash_map = {
 66	.name		= "D-Box 2 flash memory",
 67	.size		= WINDOW_SIZE,
 68	.bankwidth	= 4,
 69	.phys		= WINDOW_ADDR,
 70};
 71
 72static int __init init_dbox2_flash(void)
 73{
 74       	printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
 75	dbox2_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
 76
 77	if (!dbox2_flash_map.virt) {
 78		printk("Failed to ioremap\n");
 79		return -EIO;
 80	}
 81	simple_map_init(&dbox2_flash_map);
 82
 83	// Probe for dual Intel 28F320 or dual AMD
 84	mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
 85	if (!mymtd) {
 86	    // Probe for single Intel 28F640
 87	    dbox2_flash_map.bankwidth = 2;
 88
 89	    mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
 90	}
 91
 92	if (mymtd) {
 93		mymtd->owner = THIS_MODULE;
 94
 95                /* Create MTD devices for each partition. */
 96		mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
 97
 98		return 0;
 99	}
100
101	iounmap((void *)dbox2_flash_map.virt);
102	return -ENXIO;
103}
104
105static void __exit cleanup_dbox2_flash(void)
106{
107	if (mymtd) {
108		mtd_device_unregister(mymtd);
109		map_destroy(mymtd);
110	}
111	if (dbox2_flash_map.virt) {
112		iounmap((void *)dbox2_flash_map.virt);
113		dbox2_flash_map.virt = 0;
114	}
115}
116
117module_init(init_dbox2_flash);
118module_exit(cleanup_dbox2_flash);
119
120
121MODULE_LICENSE("GPL");
122MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
123MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");