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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>
21
22#include <asm/io.h>
23#include <mach/hardware.h>
24
25#include <asm/mach/flash.h>
26
27#define CACHELINESIZE 32
28
29static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from,
30 ssize_t len)
31{
32 unsigned long start = (unsigned long)map->cached + from;
33 unsigned long end = start + len;
34
35 start &= ~(CACHELINESIZE - 1);
36 while (start < end) {
37
38 asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start));
39 start += CACHELINESIZE;
40 }
41}
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
54static int __devinit pxa2xx_flash_probe(struct platform_device *pdev)
55{
56 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
66 info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL);
67 if (!info)
68 return -ENOMEM;
69
70 info->map.name = (char *) flash->name;
71 info->map.bankwidth = flash->width;
72 info->map.phys = res->start;
73 info->map.size = resource_size(res);
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 ret = parse_mtd_partitions(info->mtd, probes, &parts, 0);
108
109 if (ret > 0) {
110 info->nr_parts = ret;
111 info->parts = parts;
112 }
113
114 if (!info->nr_parts)
115 printk("Registering %s as whole device\n",
116 info->map.name);
117
118 mtd_device_register(info->mtd, info->parts, info->nr_parts);
119
120 platform_set_drvdata(pdev, info);
121 return 0;
122}
123
124static int __devexit pxa2xx_flash_remove(struct platform_device *dev)
125{
126 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
127
128 platform_set_drvdata(dev, NULL);
129
130 mtd_device_unregister(info->mtd);
131
132 map_destroy(info->mtd);
133 iounmap(info->map.virt);
134 if (info->map.cached)
135 iounmap(info->map.cached);
136 kfree(info->parts);
137 kfree(info);
138 return 0;
139}
140
141#ifdef CONFIG_PM
142static void pxa2xx_flash_shutdown(struct platform_device *dev)
143{
144 struct pxa2xx_flash_info *info = platform_get_drvdata(dev);
145
146 if (info && info->mtd->suspend(info->mtd) == 0)
147 info->mtd->resume(info->mtd);
148}
149#else
150#define pxa2xx_flash_shutdown NULL
151#endif
152
153static struct platform_driver pxa2xx_flash_driver = {
154 .driver = {
155 .name = "pxa2xx-flash",
156 .owner = THIS_MODULE,
157 },
158 .probe = pxa2xx_flash_probe,
159 .remove = __devexit_p(pxa2xx_flash_remove),
160 .shutdown = pxa2xx_flash_shutdown,
161};
162
163static int __init init_pxa2xx_flash(void)
164{
165 return platform_driver_register(&pxa2xx_flash_driver);
166}
167
168static void __exit cleanup_pxa2xx_flash(void)
169{
170 platform_driver_unregister(&pxa2xx_flash_driver);
171}
172
173module_init(init_pxa2xx_flash);
174module_exit(cleanup_pxa2xx_flash);
175
176MODULE_LICENSE("GPL");
177MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>");
178MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx");
179
