fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / mtd / maps / omap_nor.c
blobe8d9ae535673d68d04b547f029dbdadefd6b3e58
1 /*
2 * Flash memory support for various TI OMAP boards
4 * Copyright (C) 2001-2002 MontaVista Software Inc.
5 * Copyright (C) 2003-2004 Texas Instruments
6 * Copyright (C) 2004 Nokia Corporation
8 * Assembled using driver code copyright the companies above
9 * and written by David Brownell, Jian Zhang <jzhang@ti.com>,
10 * Tony Lindgren <tony@atomide.com> and others.
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * You should have received a copy of the GNU General Public License along
29 * with this program; if not, write to the Free Software Foundation, Inc.,
30 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include <linux/platform_device.h>
34 #include <linux/module.h>
35 #include <linux/types.h>
36 #include <linux/kernel.h>
37 #include <linux/init.h>
38 #include <linux/ioport.h>
39 #include <linux/slab.h>
41 #include <linux/mtd/mtd.h>
42 #include <linux/mtd/map.h>
43 #include <linux/mtd/partitions.h>
45 #include <asm/io.h>
46 #include <asm/hardware.h>
47 #include <asm/mach/flash.h>
48 #include <asm/arch/tc.h>
50 #ifdef CONFIG_MTD_PARTITIONS
51 static const char *part_probes[] = { /* "RedBoot", */ "cmdlinepart", NULL };
52 #endif
54 struct omapflash_info {
55 struct mtd_partition *parts;
56 struct mtd_info *mtd;
57 struct map_info map;
60 static void omap_set_vpp(struct map_info *map, int enable)
62 static int count;
64 if (enable) {
65 if (count++ == 0)
66 OMAP_EMIFS_CONFIG_REG |= OMAP_EMIFS_CONFIG_WP;
67 } else {
68 if (count && (--count == 0))
69 OMAP_EMIFS_CONFIG_REG &= ~OMAP_EMIFS_CONFIG_WP;
73 static int __devinit omapflash_probe(struct platform_device *pdev)
75 int err;
76 struct omapflash_info *info;
77 struct flash_platform_data *pdata = pdev->dev.platform_data;
78 struct resource *res = pdev->resource;
79 unsigned long size = res->end - res->start + 1;
81 info = kzalloc(sizeof(struct omapflash_info), GFP_KERNEL);
82 if (!info)
83 return -ENOMEM;
85 if (!request_mem_region(res->start, size, "flash")) {
86 err = -EBUSY;
87 goto out_free_info;
90 info->map.virt = ioremap(res->start, size);
91 if (!info->map.virt) {
92 err = -ENOMEM;
93 goto out_release_mem_region;
95 info->map.name = pdev->dev.bus_id;
96 info->map.phys = res->start;
97 info->map.size = size;
98 info->map.bankwidth = pdata->width;
99 info->map.set_vpp = omap_set_vpp;
101 simple_map_init(&info->map);
102 info->mtd = do_map_probe(pdata->map_name, &info->map);
103 if (!info->mtd) {
104 err = -EIO;
105 goto out_iounmap;
107 info->mtd->owner = THIS_MODULE;
109 #ifdef CONFIG_MTD_PARTITIONS
110 err = parse_mtd_partitions(info->mtd, part_probes, &info->parts, 0);
111 if (err > 0)
112 add_mtd_partitions(info->mtd, info->parts, err);
113 else if (err < 0 && pdata->parts)
114 add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
115 else
116 #endif
117 add_mtd_device(info->mtd);
119 platform_set_drvdata(pdev, info);
121 return 0;
123 out_iounmap:
124 iounmap(info->map.virt);
125 out_release_mem_region:
126 release_mem_region(res->start, size);
127 out_free_info:
128 kfree(info);
130 return err;
133 static int __devexit omapflash_remove(struct platform_device *pdev)
135 struct omapflash_info *info = platform_get_drvdata(pdev);
137 platform_set_drvdata(pdev, NULL);
139 if (info) {
140 if (info->parts) {
141 del_mtd_partitions(info->mtd);
142 kfree(info->parts);
143 } else
144 del_mtd_device(info->mtd);
145 map_destroy(info->mtd);
146 release_mem_region(info->map.phys, info->map.size);
147 iounmap((void __iomem *) info->map.virt);
148 kfree(info);
151 return 0;
154 static struct platform_driver omapflash_driver = {
155 .probe = omapflash_probe,
156 .remove = __devexit_p(omapflash_remove),
157 .driver = {
158 .name = "omapflash",
162 static int __init omapflash_init(void)
164 return platform_driver_register(&omapflash_driver);
167 static void __exit omapflash_exit(void)
169 platform_driver_unregister(&omapflash_driver);
172 module_init(omapflash_init);
173 module_exit(omapflash_exit);
175 MODULE_LICENSE("GPL");
176 MODULE_DESCRIPTION("MTD NOR map driver for TI OMAP boards");