mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
4897015d2f
If driver doesn't specify parsers it can use that little helper. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
/*
|
|
* Handle mapping of the NOR flash on implementa A7 boards
|
|
*
|
|
* Copyright 2002 SYSGO Real-Time Solutions GmbH
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <asm/io.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#define WINDOW_ADDR0 0x00000000 /* physical properties of flash */
|
|
#define WINDOW_SIZE0 0x00800000
|
|
#define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
|
|
#define WINDOW_SIZE1 0x00800000
|
|
#define NUM_FLASHBANKS 2
|
|
#define BUSWIDTH 4
|
|
|
|
#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
|
|
#define MTDID "impa7-%d" /* for mtdparts= partitioning */
|
|
|
|
static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
|
|
|
|
static const char * const rom_probe_types[] = { "jedec_probe", NULL };
|
|
|
|
static struct map_info impa7_map[NUM_FLASHBANKS] = {
|
|
{
|
|
.name = "impA7 NOR Flash Bank #0",
|
|
.size = WINDOW_SIZE0,
|
|
.bankwidth = BUSWIDTH,
|
|
},
|
|
{
|
|
.name = "impA7 NOR Flash Bank #1",
|
|
.size = WINDOW_SIZE1,
|
|
.bankwidth = BUSWIDTH,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* MTD partitioning stuff
|
|
*/
|
|
static const struct mtd_partition partitions[] =
|
|
{
|
|
{
|
|
.name = "FileSystem",
|
|
.size = 0x800000,
|
|
.offset = 0x00000000
|
|
},
|
|
};
|
|
|
|
static int __init init_impa7(void)
|
|
{
|
|
const char * const *type;
|
|
int i;
|
|
static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
|
|
{ WINDOW_ADDR0, WINDOW_SIZE0 },
|
|
{ WINDOW_ADDR1, WINDOW_SIZE1 },
|
|
};
|
|
int devicesfound = 0;
|
|
|
|
for(i=0; i<NUM_FLASHBANKS; i++)
|
|
{
|
|
printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
|
|
pt[i].size, pt[i].addr);
|
|
|
|
impa7_map[i].phys = pt[i].addr;
|
|
impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
|
|
if (!impa7_map[i].virt) {
|
|
printk(MSG_PREFIX "failed to ioremap\n");
|
|
return -EIO;
|
|
}
|
|
simple_map_init(&impa7_map[i]);
|
|
|
|
impa7_mtd[i] = NULL;
|
|
type = rom_probe_types;
|
|
for(; !impa7_mtd[i] && *type; type++) {
|
|
impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
|
|
}
|
|
|
|
if (impa7_mtd[i]) {
|
|
impa7_mtd[i]->owner = THIS_MODULE;
|
|
devicesfound++;
|
|
mtd_device_register(impa7_mtd[i], partitions,
|
|
ARRAY_SIZE(partitions));
|
|
} else {
|
|
iounmap((void __iomem *)impa7_map[i].virt);
|
|
}
|
|
}
|
|
return devicesfound == 0 ? -ENXIO : 0;
|
|
}
|
|
|
|
static void __exit cleanup_impa7(void)
|
|
{
|
|
int i;
|
|
for (i=0; i<NUM_FLASHBANKS; i++) {
|
|
if (impa7_mtd[i]) {
|
|
mtd_device_unregister(impa7_mtd[i]);
|
|
map_destroy(impa7_mtd[i]);
|
|
iounmap((void __iomem *)impa7_map[i].virt);
|
|
impa7_map[i].virt = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
module_init(init_impa7);
|
|
module_exit(cleanup_impa7);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
|
|
MODULE_DESCRIPTION("MTD map driver for implementa impA7");
|