1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
21da177e4SLinus Torvalds /*
31da177e4SLinus Torvalds * Handle mapping of the NOR flash on implementa A7 boards
41da177e4SLinus Torvalds *
51da177e4SLinus Torvalds * Copyright 2002 SYSGO Real-Time Solutions GmbH
61da177e4SLinus Torvalds */
71da177e4SLinus Torvalds
81da177e4SLinus Torvalds #include <linux/module.h>
91da177e4SLinus Torvalds #include <linux/types.h>
101da177e4SLinus Torvalds #include <linux/kernel.h>
111da177e4SLinus Torvalds #include <linux/init.h>
121da177e4SLinus Torvalds #include <asm/io.h>
131da177e4SLinus Torvalds #include <linux/mtd/mtd.h>
141da177e4SLinus Torvalds #include <linux/mtd/map.h>
151da177e4SLinus Torvalds #include <linux/mtd/partitions.h>
161da177e4SLinus Torvalds
171da177e4SLinus Torvalds #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */
181da177e4SLinus Torvalds #define WINDOW_SIZE0 0x00800000
191da177e4SLinus Torvalds #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
201da177e4SLinus Torvalds #define WINDOW_SIZE1 0x00800000
211da177e4SLinus Torvalds #define NUM_FLASHBANKS 2
221da177e4SLinus Torvalds #define BUSWIDTH 4
231da177e4SLinus Torvalds
241da177e4SLinus Torvalds #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
251da177e4SLinus Torvalds #define MTDID "impa7-%d" /* for mtdparts= partitioning */
261da177e4SLinus Torvalds
271da177e4SLinus Torvalds static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
281da177e4SLinus Torvalds
290984c891SArtem Bityutskiy static const char * const rom_probe_types[] = { "jedec_probe", NULL };
301da177e4SLinus Torvalds
311da177e4SLinus Torvalds static struct map_info impa7_map[NUM_FLASHBANKS] = {
321da177e4SLinus Torvalds {
331da177e4SLinus Torvalds .name = "impA7 NOR Flash Bank #0",
341da177e4SLinus Torvalds .size = WINDOW_SIZE0,
351da177e4SLinus Torvalds .bankwidth = BUSWIDTH,
361da177e4SLinus Torvalds },
371da177e4SLinus Torvalds {
381da177e4SLinus Torvalds .name = "impA7 NOR Flash Bank #1",
391da177e4SLinus Torvalds .size = WINDOW_SIZE1,
401da177e4SLinus Torvalds .bankwidth = BUSWIDTH,
411da177e4SLinus Torvalds },
421da177e4SLinus Torvalds };
431da177e4SLinus Torvalds
441da177e4SLinus Torvalds /*
451da177e4SLinus Torvalds * MTD partitioning stuff
461da177e4SLinus Torvalds */
47d4906688SArvind Yadav static const struct mtd_partition partitions[] =
481da177e4SLinus Torvalds {
491da177e4SLinus Torvalds {
501da177e4SLinus Torvalds .name = "FileSystem",
511da177e4SLinus Torvalds .size = 0x800000,
521da177e4SLinus Torvalds .offset = 0x00000000
531da177e4SLinus Torvalds },
541da177e4SLinus Torvalds };
551da177e4SLinus Torvalds
init_impa7(void)564f8f3af2SDmitri Vorobiev static int __init init_impa7(void)
571da177e4SLinus Torvalds {
580984c891SArtem Bityutskiy const char * const *type;
591da177e4SLinus Torvalds int i;
601da177e4SLinus Torvalds static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
611da177e4SLinus Torvalds { WINDOW_ADDR0, WINDOW_SIZE0 },
621da177e4SLinus Torvalds { WINDOW_ADDR1, WINDOW_SIZE1 },
631da177e4SLinus Torvalds };
641da177e4SLinus Torvalds int devicesfound = 0;
651da177e4SLinus Torvalds
661da177e4SLinus Torvalds for(i=0; i<NUM_FLASHBANKS; i++)
671da177e4SLinus Torvalds {
681da177e4SLinus Torvalds printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
691da177e4SLinus Torvalds pt[i].size, pt[i].addr);
701da177e4SLinus Torvalds
711da177e4SLinus Torvalds impa7_map[i].phys = pt[i].addr;
721da177e4SLinus Torvalds impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
731da177e4SLinus Torvalds if (!impa7_map[i].virt) {
741da177e4SLinus Torvalds printk(MSG_PREFIX "failed to ioremap\n");
751da177e4SLinus Torvalds return -EIO;
761da177e4SLinus Torvalds }
771da177e4SLinus Torvalds simple_map_init(&impa7_map[i]);
781da177e4SLinus Torvalds
79d1d90c99SJingoo Han impa7_mtd[i] = NULL;
801da177e4SLinus Torvalds type = rom_probe_types;
811da177e4SLinus Torvalds for(; !impa7_mtd[i] && *type; type++) {
821da177e4SLinus Torvalds impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
831da177e4SLinus Torvalds }
841da177e4SLinus Torvalds
851da177e4SLinus Torvalds if (impa7_mtd[i]) {
861da177e4SLinus Torvalds impa7_mtd[i]->owner = THIS_MODULE;
871da177e4SLinus Torvalds devicesfound++;
884897015dSRafał Miłecki mtd_device_register(impa7_mtd[i], partitions,
895003403bSDmitry Eremin-Solenikov ARRAY_SIZE(partitions));
90d1d90c99SJingoo Han } else {
91d1d90c99SJingoo Han iounmap((void __iomem *)impa7_map[i].virt);
921da177e4SLinus Torvalds }
931da177e4SLinus Torvalds }
941da177e4SLinus Torvalds return devicesfound == 0 ? -ENXIO : 0;
951da177e4SLinus Torvalds }
961da177e4SLinus Torvalds
cleanup_impa7(void)971da177e4SLinus Torvalds static void __exit cleanup_impa7(void)
981da177e4SLinus Torvalds {
991da177e4SLinus Torvalds int i;
1001da177e4SLinus Torvalds for (i=0; i<NUM_FLASHBANKS; i++) {
1011da177e4SLinus Torvalds if (impa7_mtd[i]) {
10296b639fdSJamie Iles mtd_device_unregister(impa7_mtd[i]);
1031da177e4SLinus Torvalds map_destroy(impa7_mtd[i]);
104d1d90c99SJingoo Han iounmap((void __iomem *)impa7_map[i].virt);
105d1d90c99SJingoo Han impa7_map[i].virt = NULL;
1061da177e4SLinus Torvalds }
1071da177e4SLinus Torvalds }
1081da177e4SLinus Torvalds }
1091da177e4SLinus Torvalds
1101da177e4SLinus Torvalds module_init(init_impa7);
1111da177e4SLinus Torvalds module_exit(cleanup_impa7);
1121da177e4SLinus Torvalds
1131da177e4SLinus Torvalds MODULE_LICENSE("GPL");
1141da177e4SLinus Torvalds MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
1151da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD map driver for implementa impA7");
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