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 | ||
48 | ||
49 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
50 | ||
51 | ||
06f25510 | 52 | static int pxa2xx_flash_probe(struct platform_device *pdev) |
e644f7d6 | 53 | { |
e644f7d6 TP |
54 | struct flash_platform_data *flash = pdev->dev.platform_data; |
55 | struct pxa2xx_flash_info *info; | |
e644f7d6 | 56 | struct resource *res; |
e644f7d6 TP |
57 | |
58 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
59 | if (!res) | |
60 | return -ENODEV; | |
61 | ||
2bfefa4c | 62 | info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); |
e644f7d6 TP |
63 | if (!info) |
64 | return -ENOMEM; | |
65 | ||
e644f7d6 TP |
66 | info->map.name = (char *) flash->name; |
67 | info->map.bankwidth = flash->width; | |
68 | info->map.phys = res->start; | |
28f65c11 | 69 | info->map.size = resource_size(res); |
e644f7d6 TP |
70 | |
71 | info->map.virt = ioremap(info->map.phys, info->map.size); | |
72 | if (!info->map.virt) { | |
73 | printk(KERN_WARNING "Failed to ioremap %s\n", | |
74 | info->map.name); | |
75 | return -ENOMEM; | |
76 | } | |
77 | info->map.cached = | |
78 | ioremap_cached(info->map.phys, info->map.size); | |
79 | if (!info->map.cached) | |
80 | printk(KERN_WARNING "Failed to ioremap cached %s\n", | |
81 | info->map.name); | |
82 | info->map.inval_cache = pxa2xx_map_inval_cache; | |
83 | simple_map_init(&info->map); | |
84 | ||
85 | printk(KERN_NOTICE | |
86 | "Probing %s at physical address 0x%08lx" | |
87 | " (%d-bit bankwidth)\n", | |
88 | info->map.name, (unsigned long)info->map.phys, | |
89 | info->map.bankwidth * 8); | |
90 | ||
91 | info->mtd = do_map_probe(flash->map_name, &info->map); | |
92 | ||
93 | if (!info->mtd) { | |
94 | iounmap((void *)info->map.virt); | |
95 | if (info->map.cached) | |
96 | iounmap(info->map.cached); | |
97 | return -EIO; | |
98 | } | |
99 | info->mtd->owner = THIS_MODULE; | |
100 | ||
42d7fbe2 AB |
101 | mtd_device_parse_register(info->mtd, probes, NULL, flash->parts, |
102 | flash->nr_parts); | |
e644f7d6 | 103 | |
7a192ec3 | 104 | platform_set_drvdata(pdev, info); |
e644f7d6 TP |
105 | return 0; |
106 | } | |
107 | ||
810b7e06 | 108 | static int pxa2xx_flash_remove(struct platform_device *dev) |
e644f7d6 | 109 | { |
7a192ec3 | 110 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 111 | |
7a192ec3 | 112 | platform_set_drvdata(dev, NULL); |
e644f7d6 | 113 | |
3dfad123 | 114 | mtd_device_unregister(info->mtd); |
e644f7d6 TP |
115 | |
116 | map_destroy(info->mtd); | |
117 | iounmap(info->map.virt); | |
118 | if (info->map.cached) | |
119 | iounmap(info->map.cached); | |
e644f7d6 TP |
120 | kfree(info); |
121 | return 0; | |
122 | } | |
123 | ||
124 | #ifdef CONFIG_PM | |
7a192ec3 | 125 | static void pxa2xx_flash_shutdown(struct platform_device *dev) |
e644f7d6 | 126 | { |
7a192ec3 | 127 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 128 | |
3fe4bae8 | 129 | if (info && mtd_suspend(info->mtd) == 0) |
ead995f8 | 130 | mtd_resume(info->mtd); |
e644f7d6 TP |
131 | } |
132 | #else | |
e644f7d6 TP |
133 | #define pxa2xx_flash_shutdown NULL |
134 | #endif | |
135 | ||
7a192ec3 ML |
136 | static struct platform_driver pxa2xx_flash_driver = { |
137 | .driver = { | |
138 | .name = "pxa2xx-flash", | |
139 | .owner = THIS_MODULE, | |
140 | }, | |
e644f7d6 | 141 | .probe = pxa2xx_flash_probe, |
5153b88c | 142 | .remove = pxa2xx_flash_remove, |
e644f7d6 TP |
143 | .shutdown = pxa2xx_flash_shutdown, |
144 | }; | |
145 | ||
f99640de | 146 | module_platform_driver(pxa2xx_flash_driver); |
e644f7d6 TP |
147 | |
148 | MODULE_LICENSE("GPL"); | |
2f82af08 | 149 | MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); |
e644f7d6 | 150 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |