2 * $Id: impa7.c,v 1.2 2002/09/05 05:11:24 acurtis Exp $
4 * Handle mapping of the NOR flash on implementa A7 boards
6 * Copyright 2002 SYSGO Real-Time Solutions GmbH
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/map.h>
19 #include <linux/config.h>
21 #ifdef CONFIG_MTD_PARTITIONS
22 #include <linux/mtd/partitions.h>
25 #define WINDOW_ADDR0 0x00000000 /* physical properties of flash */
26 #define WINDOW_SIZE0 0x00800000
27 #define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
28 #define WINDOW_SIZE1 0x00800000
29 #define NUM_FLASHBANKS 2
32 /* can be { "cfi_probe", "jedec_probe", "map_rom", 0 }; */
33 #define PROBETYPES { "jedec_probe", 0 }
35 #define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
36 #define MTDID "impa7-%d" /* for mtdparts= partitioning */
38 static struct mtd_info *impa7_mtd[NUM_FLASHBANKS] = { 0 };
40 __u8 impa7_read8(struct map_info *map, unsigned long ofs)
42 return __raw_readb(map->map_priv_1 + ofs);
45 __u16 impa7_read16(struct map_info *map, unsigned long ofs)
47 return __raw_readw(map->map_priv_1 + ofs);
50 __u32 impa7_read32(struct map_info *map, unsigned long ofs)
52 return __raw_readl(map->map_priv_1 + ofs);
55 void impa7_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
57 memcpy_fromio(to, map->map_priv_1 + from, len);
60 void impa7_write8(struct map_info *map, __u8 d, unsigned long adr)
62 __raw_writeb(d, map->map_priv_1 + adr);
66 void impa7_write16(struct map_info *map, __u16 d, unsigned long adr)
68 __raw_writew(d, map->map_priv_1 + adr);
72 void impa7_write32(struct map_info *map, __u32 d, unsigned long adr)
74 __raw_writel(d, map->map_priv_1 + adr);
78 void impa7_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
80 memcpy_toio(map->map_priv_1 + to, from, len);
83 static struct map_info impa7_map[NUM_FLASHBANKS] = {
85 name: "impA7 NOR Flash Bank #0",
91 copy_from: impa7_copy_from,
93 write16: impa7_write16,
94 write32: impa7_write32,
95 copy_to: impa7_copy_to
98 name: "impA7 NOR Flash Bank #1",
102 read16: impa7_read16,
103 read32: impa7_read32,
104 copy_from: impa7_copy_from,
105 write8: impa7_write8,
106 write16: impa7_write16,
107 write32: impa7_write32,
108 copy_to: impa7_copy_to
112 #ifdef CONFIG_MTD_PARTITIONS
115 * MTD partitioning stuff
117 static struct mtd_partition static_partitions[] =
126 #define NB_OF(x) (sizeof (x) / sizeof (x[0]))
128 #ifdef CONFIG_MTD_CMDLINE_PARTS
129 int parse_cmdline_partitions(struct mtd_info *master,
130 struct mtd_partition **pparts,
136 static int mtd_parts_nb = 0;
137 static struct mtd_partition *mtd_parts = 0;
139 int __init init_impa7(void)
141 static const char *rom_probe_types[] = PROBETYPES;
143 const char *part_type = 0;
145 static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
146 { WINDOW_ADDR0, WINDOW_SIZE0 },
147 { WINDOW_ADDR1, WINDOW_SIZE1 },
150 int devicesfound = 0;
152 for(i=0; i<NUM_FLASHBANKS; i++)
154 printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
155 pt[i].size, pt[i].addr);
156 impa7_map[i].map_priv_1 = (unsigned long)
157 ioremap(pt[i].addr, pt[i].size);
159 if (!impa7_map[i].map_priv_1) {
160 printk(MSG_PREFIX "failed to ioremap\n");
165 type = rom_probe_types;
166 for(; !impa7_mtd[i] && *type; type++) {
167 impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
172 impa7_mtd[i]->module = THIS_MODULE;
173 add_mtd_device(impa7_mtd[i]);
175 #ifdef CONFIG_MTD_PARTITIONS
176 #ifdef CONFIG_MTD_CMDLINE_PARTS
177 sprintf(mtdid, MTDID, i);
178 mtd_parts_nb = parse_cmdline_partitions(impa7_mtd[i],
181 if (mtd_parts_nb > 0)
182 part_type = "command line";
184 if (mtd_parts_nb <= 0)
186 mtd_parts = static_partitions;
187 mtd_parts_nb = NB_OF(static_partitions);
188 part_type = "static";
190 if (mtd_parts_nb <= 0)
192 printk(KERN_NOTICE MSG_PREFIX
193 "no partition info available\n");
197 printk(KERN_NOTICE MSG_PREFIX
198 "using %s partition definition\n",
200 add_mtd_partitions(impa7_mtd[i],
201 mtd_parts, mtd_parts_nb);
206 iounmap((void *)impa7_map[i].map_priv_1);
208 return devicesfound == 0 ? -ENXIO : 0;
211 static void __exit cleanup_impa7(void)
214 for (i=0; i<NUM_FLASHBANKS; i++)
218 del_mtd_device(impa7_mtd[i]);
219 map_destroy(impa7_mtd[i]);
221 if (impa7_map[i].map_priv_1)
223 iounmap((void *)impa7_map[i].map_priv_1);
224 impa7_map[i].map_priv_1 = 0;
229 module_init(init_impa7);
230 module_exit(cleanup_impa7);
232 MODULE_LICENSE("GPL");
233 MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
234 MODULE_DESCRIPTION("MTD map driver for implementa impA7");