2 * Map driver for Intel XScale PXA2xx platforms.
4 * Author: Nicolas Pitre
5 * Copyright: (C) 2001 MontaVista Software Inc.
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.
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/map.h>
20 #include <linux/mtd/partitions.h>
23 #include <mach/hardware.h>
25 #include <asm/mach/flash.h>
27 #define CACHELINESIZE 32
29 static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
32 unsigned long start = (unsigned long)map->cached + from;
33 unsigned long end = start + len;
35 start &= ~(CACHELINESIZE - 1);
37 /* invalidate D cache line */
38 asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
39 start += CACHELINESIZE;
43 struct pxa2xx_flash_info {
44 struct mtd_partition *parts;
51 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
54 static int __init pxa2xx_flash_probe(struct platform_device *pdev)
56 struct flash_platform_data *flash = pdev->dev.platform_data;
57 struct pxa2xx_flash_info *info;
58 struct mtd_partition *parts;
62 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
66 info = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
70 memset(info, 0, sizeof(struct pxa2xx_flash_info));
71 info->map.name = (char *) flash->name;
72 info->map.bankwidth = flash->width;
73 info->map.phys = res->start;
74 info->map.size = res->end - res->start + 1;
75 info->parts = flash->parts;
76 info->nr_parts = flash->nr_parts;
78 info->map.virt = ioremap(info->map.phys, info->map.size);
79 if (!info->map.virt) {
80 printk(KERN_WARNING "Failed to ioremap %s\n",
85 ioremap_cached(info->map.phys, info->map.size);
86 if (!info->map.cached)
87 printk(KERN_WARNING "Failed to ioremap cached %s\n",
89 info->map.inval_cache = pxa2xx_map_inval_cache;
90 simple_map_init(&info->map);
93 "Probing %s at physical address 0x%08lx"
94 " (%d-bit bankwidth)\n",
95 info->map.name, (unsigned long)info->map.phys,
96 info->map.bankwidth * 8);
98 info->mtd = do_map_probe(flash->map_name, &info->map);
101 iounmap((void *)info->map.virt);
102 if (info->map.cached)
103 iounmap(info->map.cached);
106 info->mtd->owner = THIS_MODULE;
108 #ifdef CONFIG_MTD_PARTITIONS
109 ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
112 info->nr_parts = ret;
117 if (info->nr_parts) {
118 add_mtd_partitions(info->mtd, info->parts,
121 printk("Registering %s as whole device\n",
123 add_mtd_device(info->mtd);
126 platform_set_drvdata(pdev, info);
130 static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
132 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
134 platform_set_drvdata(dev, NULL);
136 #ifdef CONFIG_MTD_PARTITIONS
138 del_mtd_partitions(info->mtd);
141 del_mtd_device(info->mtd);
143 map_destroy(info->mtd);
144 iounmap(info->map.virt);
145 if (info->map.cached)
146 iounmap(info->map.cached);
153 static void pxa2xx_flash_shutdown(struct platform_device *dev)
155 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
157 if (info && info->mtd->suspend(info->mtd) == 0)
158 info->mtd->resume(info->mtd);
161 #define pxa2xx_flash_shutdown NULL
164 static struct platform_driver pxa2xx_flash_driver = {
166 .name = "pxa2xx-flash",
167 .owner = THIS_MODULE,
169 .probe = pxa2xx_flash_probe,
170 .remove = __devexit_p(pxa2xx_flash_remove),
171 .shutdown = pxa2xx_flash_shutdown,
174 static int __init init_pxa2xx_flash(void)
176 return platform_driver_register(&pxa2xx_flash_driver);
179 static void __exit cleanup_pxa2xx_flash(void)
181 platform_driver_unregister(&pxa2xx_flash_driver);
184 module_init(init_pxa2xx_flash);
185 module_exit(cleanup_pxa2xx_flash);
187 MODULE_LICENSE("GPL");
188 MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
189 MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");