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Commit | Line | Data |
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e644f7d6 TP |
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> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
e644f7d6 TP |
15 | #include <linux/kernel.h> |
16 | #include <linux/init.h> | |
17 | #include <linux/platform_device.h> | |
e644f7d6 TP |
18 | #include <linux/mtd/mtd.h> |
19 | #include <linux/mtd/map.h> | |
20 | #include <linux/mtd/partitions.h> | |
21 | ||
22 | #include <asm/io.h> | |
a09e64fb | 23 | #include <mach/hardware.h> |
e644f7d6 TP |
24 | |
25 | #include <asm/mach/flash.h> | |
26 | ||
ccaf5f05 NP |
27 | #define CACHELINESIZE 32 |
28 | ||
e644f7d6 TP |
29 | static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, |
30 | ssize_t len) | |
31 | { | |
ccaf5f05 NP |
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 | /* invalidate D cache line */ | |
38 | asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)); | |
39 | start += CACHELINESIZE; | |
40 | } | |
e644f7d6 TP |
41 | } |
42 | ||
43 | struct pxa2xx_flash_info { | |
e644f7d6 TP |
44 | struct mtd_info *mtd; |
45 | struct map_info map; | |
46 | }; | |
47 | ||
0984c891 | 48 | static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; |
e644f7d6 | 49 | |
06f25510 | 50 | static int pxa2xx_flash_probe(struct platform_device *pdev) |
e644f7d6 | 51 | { |
d20d5a57 | 52 | struct flash_platform_data *flash = dev_get_platdata(&pdev->dev); |
e644f7d6 | 53 | struct pxa2xx_flash_info *info; |
e644f7d6 | 54 | struct resource *res; |
e644f7d6 TP |
55 | |
56 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
57 | if (!res) | |
58 | return -ENODEV; | |
59 | ||
2bfefa4c | 60 | info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); |
e644f7d6 TP |
61 | if (!info) |
62 | return -ENOMEM; | |
63 | ||
7c4bb4f8 | 64 | info->map.name = flash->name; |
e644f7d6 TP |
65 | info->map.bankwidth = flash->width; |
66 | info->map.phys = res->start; | |
28f65c11 | 67 | info->map.size = resource_size(res); |
e644f7d6 TP |
68 | |
69 | info->map.virt = ioremap(info->map.phys, info->map.size); | |
70 | if (!info->map.virt) { | |
71 | printk(KERN_WARNING "Failed to ioremap %s\n", | |
72 | info->map.name); | |
73 | return -ENOMEM; | |
74 | } | |
75 | info->map.cached = | |
0a5ccc86 | 76 | ioremap_cache(info->map.phys, info->map.size); |
e644f7d6 TP |
77 | if (!info->map.cached) |
78 | printk(KERN_WARNING "Failed to ioremap cached %s\n", | |
79 | info->map.name); | |
80 | info->map.inval_cache = pxa2xx_map_inval_cache; | |
81 | simple_map_init(&info->map); | |
82 | ||
83 | printk(KERN_NOTICE | |
84 | "Probing %s at physical address 0x%08lx" | |
85 | " (%d-bit bankwidth)\n", | |
86 | info->map.name, (unsigned long)info->map.phys, | |
87 | info->map.bankwidth * 8); | |
88 | ||
89 | info->mtd = do_map_probe(flash->map_name, &info->map); | |
90 | ||
91 | if (!info->mtd) { | |
92 | iounmap((void *)info->map.virt); | |
93 | if (info->map.cached) | |
94 | iounmap(info->map.cached); | |
95 | return -EIO; | |
96 | } | |
97 | info->mtd->owner = THIS_MODULE; | |
98 | ||
42d7fbe2 AB |
99 | mtd_device_parse_register(info->mtd, probes, NULL, flash->parts, |
100 | flash->nr_parts); | |
e644f7d6 | 101 | |
7a192ec3 | 102 | platform_set_drvdata(pdev, info); |
e644f7d6 TP |
103 | return 0; |
104 | } | |
105 | ||
810b7e06 | 106 | static int pxa2xx_flash_remove(struct platform_device *dev) |
e644f7d6 | 107 | { |
7a192ec3 | 108 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 109 | |
3dfad123 | 110 | mtd_device_unregister(info->mtd); |
e644f7d6 TP |
111 | |
112 | map_destroy(info->mtd); | |
113 | iounmap(info->map.virt); | |
114 | if (info->map.cached) | |
115 | iounmap(info->map.cached); | |
e644f7d6 TP |
116 | kfree(info); |
117 | return 0; | |
118 | } | |
119 | ||
120 | #ifdef CONFIG_PM | |
7a192ec3 | 121 | static void pxa2xx_flash_shutdown(struct platform_device *dev) |
e644f7d6 | 122 | { |
7a192ec3 | 123 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 124 | |
3fe4bae8 | 125 | if (info && mtd_suspend(info->mtd) == 0) |
ead995f8 | 126 | mtd_resume(info->mtd); |
e644f7d6 TP |
127 | } |
128 | #else | |
e644f7d6 TP |
129 | #define pxa2xx_flash_shutdown NULL |
130 | #endif | |
131 | ||
7a192ec3 ML |
132 | static struct platform_driver pxa2xx_flash_driver = { |
133 | .driver = { | |
134 | .name = "pxa2xx-flash", | |
135 | .owner = THIS_MODULE, | |
136 | }, | |
e644f7d6 | 137 | .probe = pxa2xx_flash_probe, |
5153b88c | 138 | .remove = pxa2xx_flash_remove, |
e644f7d6 TP |
139 | .shutdown = pxa2xx_flash_shutdown, |
140 | }; | |
141 | ||
f99640de | 142 | module_platform_driver(pxa2xx_flash_driver); |
e644f7d6 TP |
143 | |
144 | MODULE_LICENSE("GPL"); | |
2f82af08 | 145 | MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); |
e644f7d6 | 146 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |