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Todd Poynore644f7d2005-11-07 21:47:48 +00001/*
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090014#include <linux/slab.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000015#include <linux/kernel.h>
16#include <linux/init.h>
17#include <linux/platform_device.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000018#include <linux/mtd/mtd.h>
19#include <linux/mtd/map.h>
20#include <linux/mtd/partitions.h>
21
22#include <asm/io.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010023#include <mach/hardware.h>
Todd Poynore644f7d2005-11-07 21:47:48 +000024
25#include <asm/mach/flash.h>
26
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010027#define CACHELINESIZE 32
28
Todd Poynore644f7d2005-11-07 21:47:48 +000029static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
30 ssize_t len)
31{
Nicolas Pitreccaf5f02009-12-11 02:21:57 +010032 unsigned long start = (unsigned long)map->cached + from;
33 unsigned long end = start + len;
34
35 start &= ~(CACHELINESIZE - 1);
36 while (start < end) {
37 /* invalidate D cache line */
38 asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
39 start += CACHELINESIZE;
40 }
Todd Poynore644f7d2005-11-07 21:47:48 +000041}
42
43struct pxa2xx_flash_info {
44 struct mtd_partition *parts;
45 int nr_parts;
46 struct mtd_info *mtd;
47 struct map_info map;
48};
49
50
51static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
52
53
Marek Vasutf9d1bf72010-10-10 00:34:28 +020054static int __devinit pxa2xx_flash_probe(struct platform_device *pdev)
Todd Poynore644f7d2005-11-07 21:47:48 +000055{
Todd Poynore644f7d2005-11-07 21:47:48 +000056 struct flash_platform_data *flash = pdev->dev.platform_data;
57 struct pxa2xx_flash_info *info;
58 struct mtd_partition *parts;
59 struct resource *res;
60 int ret = 0;
61
62 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
63 if (!res)
64 return -ENODEV;
65
Julia Lawall2bfefa42010-05-13 22:03:15 +020066 info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
Todd Poynore644f7d2005-11-07 21:47:48 +000067 if (!info)
68 return -ENOMEM;
69
Todd Poynore644f7d2005-11-07 21:47:48 +000070 info->map.name = (char *) flash->name;
71 info->map.bankwidth = flash->width;
72 info->map.phys = res->start;
73 info->map.size = res->end - res->start + 1;
74 info->parts = flash->parts;
75 info->nr_parts = flash->nr_parts;
76
77 info->map.virt = ioremap(info->map.phys, info->map.size);
78 if (!info->map.virt) {
79 printk(KERN_WARNING "Failed to ioremap %s\n",
80 info->map.name);
81 return -ENOMEM;
82 }
83 info->map.cached =
84 ioremap_cached(info->map.phys, info->map.size);
85 if (!info->map.cached)
86 printk(KERN_WARNING "Failed to ioremap cached %s\n",
87 info->map.name);
88 info->map.inval_cache = pxa2xx_map_inval_cache;
89 simple_map_init(&info->map);
90
91 printk(KERN_NOTICE
92 "Probing %s at physical address 0x%08lx"
93 " (%d-bit bankwidth)\n",
94 info->map.name, (unsigned long)info->map.phys,
95 info->map.bankwidth * 8);
96
97 info->mtd = do_map_probe(flash->map_name, &info->map);
98
99 if (!info->mtd) {
100 iounmap((void *)info->map.virt);
101 if (info->map.cached)
102 iounmap(info->map.cached);
103 return -EIO;
104 }
105 info->mtd->owner = THIS_MODULE;
106
107#ifdef CONFIG_MTD_PARTITIONS
108 ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
109
110 if (ret > 0) {
111 info->nr_parts = ret;
112 info->parts = parts;
113 }
114#endif
115
116 if (info->nr_parts) {
117 add_mtd_partitions(info->mtd, info->parts,
118 info->nr_parts);
119 } else {
120 printk("Registering %s as whole device\n",
121 info->map.name);
122 add_mtd_device(info->mtd);
123 }
124
Ming Lei7a192ec2009-02-06 23:40:12 +0800125 platform_set_drvdata(pdev, info);
Todd Poynore644f7d2005-11-07 21:47:48 +0000126 return 0;
127}
128
Russell King67a52bb2009-04-02 23:23:43 +0100129static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000130{
Ming Lei7a192ec2009-02-06 23:40:12 +0800131 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000132
Ming Lei7a192ec2009-02-06 23:40:12 +0800133 platform_set_drvdata(dev, NULL);
Todd Poynore644f7d2005-11-07 21:47:48 +0000134
135#ifdef CONFIG_MTD_PARTITIONS
136 if (info->nr_parts)
137 del_mtd_partitions(info->mtd);
138 else
139#endif
140 del_mtd_device(info->mtd);
141
142 map_destroy(info->mtd);
143 iounmap(info->map.virt);
144 if (info->map.cached)
145 iounmap(info->map.cached);
146 kfree(info->parts);
147 kfree(info);
148 return 0;
149}
150
151#ifdef CONFIG_PM
Ming Lei7a192ec2009-02-06 23:40:12 +0800152static void pxa2xx_flash_shutdown(struct platform_device *dev)
Todd Poynore644f7d2005-11-07 21:47:48 +0000153{
Ming Lei7a192ec2009-02-06 23:40:12 +0800154 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
Todd Poynore644f7d2005-11-07 21:47:48 +0000155
156 if (info && info->mtd->suspend(info->mtd) == 0)
157 info->mtd->resume(info->mtd);
158}
159#else
Todd Poynore644f7d2005-11-07 21:47:48 +0000160#define pxa2xx_flash_shutdown NULL
161#endif
162
Ming Lei7a192ec2009-02-06 23:40:12 +0800163static struct platform_driver pxa2xx_flash_driver = {
164 .driver = {
165 .name = "pxa2xx-flash",
166 .owner = THIS_MODULE,
167 },
Todd Poynore644f7d2005-11-07 21:47:48 +0000168 .probe = pxa2xx_flash_probe,
Ming Lei7a192ec2009-02-06 23:40:12 +0800169 .remove = __devexit_p(pxa2xx_flash_remove),
Todd Poynore644f7d2005-11-07 21:47:48 +0000170 .shutdown = pxa2xx_flash_shutdown,
171};
172
173static int __init init_pxa2xx_flash(void)
174{
Ming Lei7a192ec2009-02-06 23:40:12 +0800175 return platform_driver_register(&pxa2xx_flash_driver);
Todd Poynore644f7d2005-11-07 21:47:48 +0000176}
177
178static void __exit cleanup_pxa2xx_flash(void)
179{
Ming Lei7a192ec2009-02-06 23:40:12 +0800180 platform_driver_unregister(&pxa2xx_flash_driver);
Todd Poynore644f7d2005-11-07 21:47:48 +0000181}
182
183module_init(init_pxa2xx_flash);
184module_exit(cleanup_pxa2xx_flash);
185
186MODULE_LICENSE("GPL");
Nicolas Pitre2f82af02009-09-14 03:25:28 -0400187MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
Todd Poynore644f7d2005-11-07 21:47:48 +0000188MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");