1 /*
2 * Map driver for Intel XScale PXA2xx platforms.
3 *
4 * Author: Nicolas Pitre
5 * Copyright: (C) 2001 MontaVista Software Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/platform_device.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/map.h>
19 #include <linux/mtd/partitions.h>
20
21 #include <asm/io.h>
22 #include <mach/hardware.h>
23 #include <asm/cacheflush.h>
24
25 #include <asm/mach/flash.h>
26
27 static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
28 ssize_t len)
29 {
30 flush_ioremap_region(map->phys, map->cached, from, len);
31 }
32
33 struct pxa2xx_flash_info {
34 struct mtd_partition *parts;
35 int nr_parts;
36 struct mtd_info *mtd;
37 struct map_info map;
38 };
39
40
41 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
42
43
44 static int __init pxa2xx_flash_probe(struct platform_device *pdev)
45 {
46 struct flash_platform_data *flash = pdev->dev.platform_data;
47 struct pxa2xx_flash_info *info;
48 struct mtd_partition *parts;
49 struct resource *res;
50 int ret = 0;
51
52 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
53 if (!res)
54 return -ENODEV;
55
56 info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
57 if (!info)
58 return -ENOMEM;
59
60 memset(info, 0, sizeof(struct pxa2xx_flash_info));
61 info->map.name = (char *) flash->name;
62 info->map.bankwidth = flash->width;
63 info->map.phys = res->start;
64 info->map.size = res->end - res->start + 1;
65 info->parts = flash->parts;
66 info->nr_parts = flash->nr_parts;
67
68 info->map.virt = ioremap(info->map.phys, info->map.size);
69 if (!info->map.virt) {
70 printk(KERN_WARNING "Failed to ioremap %s\n",
71 info->map.name);
72 return -ENOMEM;
73 }
74 info->map.cached =
75 ioremap_cached(info->map.phys, info->map.size);
76 if (!info->map.cached)
77 printk(KERN_WARNING "Failed to ioremap cached %s\n",
78 info->map.name);
79 info->map.inval_cache = pxa2xx_map_inval_cache;
80 simple_map_init(&info->map);
81
82 printk(KERN_NOTICE
83 "Probing %s at physical address 0x%08lx"
84 " (%d-bit bankwidth)\n",
85 info->map.name, (unsigned long)info->map.phys,
86 info->map.bankwidth * 8);
87
88 info->mtd = do_map_probe(flash->map_name, &info->map);
89
90 if (!info->mtd) {
91 iounmap((void *)info->map.virt);
92 if (info->map.cached)
93 iounmap(info->map.cached);
94 return -EIO;
95 }
96 info->mtd->owner = THIS_MODULE;
97
98 #ifdef CONFIG_MTD_PARTITIONS
99 ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
100
101 if (ret > 0) {
102 info->nr_parts = ret;
103 info->parts = parts;
104 }
105 #endif
106
107 if (info->nr_parts) {
108 add_mtd_partitions(info->mtd, info->parts,
109 info->nr_parts);
110 } else {
111 printk("Registering %s as whole device\n",
112 info->map.name);
113 add_mtd_device(info->mtd);
114 }
115
116 platform_set_drvdata(pdev, info);
117 return 0;
118 }
119
120 static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
121 {
122 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
123
124 platform_set_drvdata(dev, NULL);
125
126 #ifdef CONFIG_MTD_PARTITIONS
127 if (info->nr_parts)
128 del_mtd_partitions(info->mtd);
129 else
130 #endif
131 del_mtd_device(info->mtd);
132
133 map_destroy(info->mtd);
134 iounmap(info->map.virt);
135 if (info->map.cached)
136 iounmap(info->map.cached);
137 kfree(info->parts);
138 kfree(info);
139 return 0;
140 }
141
142 #ifdef CONFIG_PM
143 static void pxa2xx_flash_shutdown(struct platform_device *dev)
144 {
145 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
146
147 if (info && info->mtd->suspend(info->mtd) == 0)
148 info->mtd->resume(info->mtd);
149 }
150 #else
151 #define pxa2xx_flash_shutdown NULL
152 #endif
153
154 static struct platform_driver pxa2xx_flash_driver = {
155 .driver = {
156 .name = "pxa2xx-flash",
157 .owner = THIS_MODULE,
158 },
159 .probe = pxa2xx_flash_probe,
160 .remove = __devexit_p(pxa2xx_flash_remove),
161 .shutdown = pxa2xx_flash_shutdown,
162 };
163
164 static int __init init_pxa2xx_flash(void)
165 {
166 return platform_driver_register(&pxa2xx_flash_driver);
167 }
168
169 static void __exit cleanup_pxa2xx_flash(void)
170 {
171 platform_driver_unregister(&pxa2xx_flash_driver);
172 }
173
174 module_init(init_pxa2xx_flash);
175 module_exit(cleanup_pxa2xx_flash);
176
177 MODULE_LICENSE("GPL");
178 MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
179 MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");
180
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