tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Handle mapping of the flash on the RPX Lite and CLLF boards
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
13
14#define WINDOW_ADDR 0xfe000000
15#define WINDOW_SIZE 0x800000
16
17static struct mtd_info *mymtd;
18
19static struct map_info rpxlite_map = {
20 .name = "RPX",
21 .size = WINDOW_SIZE,
22 .bankwidth = 4,
23 .phys = WINDOW_ADDR,
24};
25
26static int __init init_rpxlite(void)
27{
28 printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
29 rpxlite_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
30
31 if (!rpxlite_map.virt) {
32 printk("Failed to ioremap\n");
33 return -EIO;
34 }
35 simple_map_init(&rpxlite_map);
36 mymtd = do_map_probe("cfi_probe", &rpxlite_map);
37 if (mymtd) {
38 mymtd->owner = THIS_MODULE;
39 mtd_device_register(mymtd, NULL, 0);
40 return 0;
41 }
42
43 iounmap((void *)rpxlite_map.virt);
44 return -ENXIO;
45}
46
47static void __exit cleanup_rpxlite(void)
48{
49 if (mymtd) {
50 mtd_device_unregister(mymtd);
51 map_destroy(mymtd);
52 }
53 if (rpxlite_map.virt) {
54 iounmap((void *)rpxlite_map.virt);
55 rpxlite_map.virt = 0;
56 }
57}
58
59module_init(init_rpxlite);
60module_exit(cleanup_rpxlite);
61
62MODULE_LICENSE("GPL");
63MODULE_AUTHOR("Arnold Christensen <AKC@pel.dk>");
64MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");