ACPI: pci_root: simplify list traversals
[linux-2.6/linux-acpi-2.6.git] / drivers / mtd / maps / integrator-flash.c
blobc9681a339a594b2c10913027425d931c655e7bb4
1 /*======================================================================
3 drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver
5 Copyright (C) 2000 ARM Limited
6 Copyright (C) 2003 Deep Blue Solutions Ltd.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 This is access code for flashes using ARM's flash partitioning
23 standards.
25 ======================================================================*/
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/kernel.h>
30 #include <linux/slab.h>
31 #include <linux/ioport.h>
32 #include <linux/platform_device.h>
33 #include <linux/init.h>
34 #include <linux/io.h>
36 #include <linux/mtd/mtd.h>
37 #include <linux/mtd/map.h>
38 #include <linux/mtd/partitions.h>
40 #include <asm/mach/flash.h>
41 #include <mach/hardware.h>
42 #include <asm/system.h>
44 #ifdef CONFIG_ARCH_P720T
45 #define FLASH_BASE (0x04000000)
46 #define FLASH_SIZE (64*1024*1024)
47 #endif
49 struct armflash_info {
50 struct flash_platform_data *plat;
51 struct resource *res;
52 struct mtd_partition *parts;
53 struct mtd_info *mtd;
54 struct map_info map;
57 static void armflash_set_vpp(struct map_info *map, int on)
59 struct armflash_info *info = container_of(map, struct armflash_info, map);
61 if (info->plat && info->plat->set_vpp)
62 info->plat->set_vpp(on);
65 static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL };
67 static int armflash_probe(struct platform_device *dev)
69 struct flash_platform_data *plat = dev->dev.platform_data;
70 struct resource *res = dev->resource;
71 unsigned int size = res->end - res->start + 1;
72 struct armflash_info *info;
73 int err;
74 void __iomem *base;
76 info = kzalloc(sizeof(struct armflash_info), GFP_KERNEL);
77 if (!info) {
78 err = -ENOMEM;
79 goto out;
82 info->plat = plat;
83 if (plat && plat->init) {
84 err = plat->init();
85 if (err)
86 goto no_resource;
89 info->res = request_mem_region(res->start, size, "armflash");
90 if (!info->res) {
91 err = -EBUSY;
92 goto no_resource;
95 base = ioremap(res->start, size);
96 if (!base) {
97 err = -ENOMEM;
98 goto no_mem;
102 * look for CFI based flash parts fitted to this board
104 info->map.size = size;
105 info->map.bankwidth = plat->width;
106 info->map.phys = res->start;
107 info->map.virt = base;
108 info->map.name = dev_name(&dev->dev);
109 info->map.set_vpp = armflash_set_vpp;
111 simple_map_init(&info->map);
114 * Also, the CFI layer automatically works out what size
115 * of chips we have, and does the necessary identification
116 * for us automatically.
118 info->mtd = do_map_probe(plat->map_name, &info->map);
119 if (!info->mtd) {
120 err = -ENXIO;
121 goto no_device;
124 info->mtd->owner = THIS_MODULE;
126 err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0);
127 if (err > 0) {
128 err = add_mtd_partitions(info->mtd, info->parts, err);
129 if (err)
130 printk(KERN_ERR
131 "mtd partition registration failed: %d\n", err);
134 if (err == 0)
135 platform_set_drvdata(dev, info);
138 * If we got an error, free all resources.
140 if (err < 0) {
141 if (info->mtd) {
142 del_mtd_partitions(info->mtd);
143 map_destroy(info->mtd);
145 kfree(info->parts);
147 no_device:
148 iounmap(base);
149 no_mem:
150 release_mem_region(res->start, size);
151 no_resource:
152 if (plat && plat->exit)
153 plat->exit();
154 kfree(info);
156 out:
157 return err;
160 static int armflash_remove(struct platform_device *dev)
162 struct armflash_info *info = platform_get_drvdata(dev);
164 platform_set_drvdata(dev, NULL);
166 if (info) {
167 if (info->mtd) {
168 del_mtd_partitions(info->mtd);
169 map_destroy(info->mtd);
171 kfree(info->parts);
173 iounmap(info->map.virt);
174 release_resource(info->res);
175 kfree(info->res);
177 if (info->plat && info->plat->exit)
178 info->plat->exit();
180 kfree(info);
183 return 0;
186 static struct platform_driver armflash_driver = {
187 .probe = armflash_probe,
188 .remove = armflash_remove,
189 .driver = {
190 .name = "armflash",
191 .owner = THIS_MODULE,
195 static int __init armflash_init(void)
197 return platform_driver_register(&armflash_driver);
200 static void __exit armflash_exit(void)
202 platform_driver_unregister(&armflash_driver);
205 module_init(armflash_init);
206 module_exit(armflash_exit);
208 MODULE_AUTHOR("ARM Ltd");
209 MODULE_DESCRIPTION("ARM Integrator CFI map driver");
210 MODULE_LICENSE("GPL");
211 MODULE_ALIAS("platform:armflash");