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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 { | |
44 | struct mtd_partition *parts; | |
45 | int nr_parts; | |
46 | struct mtd_info *mtd; | |
47 | struct map_info map; | |
48 | }; | |
49 | ||
50 | ||
51 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; | |
52 | ||
53 | ||
7a192ec3 | 54 | static int __init pxa2xx_flash_probe(struct platform_device *pdev) |
e644f7d6 | 55 | { |
e644f7d6 TP |
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 = kmalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); | |
67 | if (!info) | |
68 | return -ENOMEM; | |
69 | ||
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; | |
77 | ||
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", | |
81 | info->map.name); | |
82 | return -ENOMEM; | |
83 | } | |
84 | info->map.cached = | |
85 | ioremap_cached(info->map.phys, info->map.size); | |
86 | if (!info->map.cached) | |
87 | printk(KERN_WARNING "Failed to ioremap cached %s\n", | |
88 | info->map.name); | |
89 | info->map.inval_cache = pxa2xx_map_inval_cache; | |
90 | simple_map_init(&info->map); | |
91 | ||
92 | printk(KERN_NOTICE | |
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); | |
97 | ||
98 | info->mtd = do_map_probe(flash->map_name, &info->map); | |
99 | ||
100 | if (!info->mtd) { | |
101 | iounmap((void *)info->map.virt); | |
102 | if (info->map.cached) | |
103 | iounmap(info->map.cached); | |
104 | return -EIO; | |
105 | } | |
106 | info->mtd->owner = THIS_MODULE; | |
107 | ||
108 | #ifdef CONFIG_MTD_PARTITIONS | |
109 | ret = parse_mtd_partitions(info->mtd, probes, &parts, 0); | |
110 | ||
111 | if (ret > 0) { | |
112 | info->nr_parts = ret; | |
113 | info->parts = parts; | |
114 | } | |
115 | #endif | |
116 | ||
117 | if (info->nr_parts) { | |
118 | add_mtd_partitions(info->mtd, info->parts, | |
119 | info->nr_parts); | |
120 | } else { | |
121 | printk("Registering %s as whole device\n", | |
122 | info->map.name); | |
123 | add_mtd_device(info->mtd); | |
124 | } | |
125 | ||
7a192ec3 | 126 | platform_set_drvdata(pdev, info); |
e644f7d6 TP |
127 | return 0; |
128 | } | |
129 | ||
67a52bb9 | 130 | static int __devexit pxa2xx_flash_remove(struct platform_device *dev) |
e644f7d6 | 131 | { |
7a192ec3 | 132 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 133 | |
7a192ec3 | 134 | platform_set_drvdata(dev, NULL); |
e644f7d6 TP |
135 | |
136 | #ifdef CONFIG_MTD_PARTITIONS | |
137 | if (info->nr_parts) | |
138 | del_mtd_partitions(info->mtd); | |
139 | else | |
140 | #endif | |
141 | del_mtd_device(info->mtd); | |
142 | ||
143 | map_destroy(info->mtd); | |
144 | iounmap(info->map.virt); | |
145 | if (info->map.cached) | |
146 | iounmap(info->map.cached); | |
147 | kfree(info->parts); | |
148 | kfree(info); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | #ifdef CONFIG_PM | |
7a192ec3 | 153 | static void pxa2xx_flash_shutdown(struct platform_device *dev) |
e644f7d6 | 154 | { |
7a192ec3 | 155 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 TP |
156 | |
157 | if (info && info->mtd->suspend(info->mtd) == 0) | |
158 | info->mtd->resume(info->mtd); | |
159 | } | |
160 | #else | |
e644f7d6 TP |
161 | #define pxa2xx_flash_shutdown NULL |
162 | #endif | |
163 | ||
7a192ec3 ML |
164 | static struct platform_driver pxa2xx_flash_driver = { |
165 | .driver = { | |
166 | .name = "pxa2xx-flash", | |
167 | .owner = THIS_MODULE, | |
168 | }, | |
e644f7d6 | 169 | .probe = pxa2xx_flash_probe, |
7a192ec3 | 170 | .remove = __devexit_p(pxa2xx_flash_remove), |
e644f7d6 TP |
171 | .shutdown = pxa2xx_flash_shutdown, |
172 | }; | |
173 | ||
174 | static int __init init_pxa2xx_flash(void) | |
175 | { | |
7a192ec3 | 176 | return platform_driver_register(&pxa2xx_flash_driver); |
e644f7d6 TP |
177 | } |
178 | ||
179 | static void __exit cleanup_pxa2xx_flash(void) | |
180 | { | |
7a192ec3 | 181 | platform_driver_unregister(&pxa2xx_flash_driver); |
e644f7d6 TP |
182 | } |
183 | ||
184 | module_init(init_pxa2xx_flash); | |
185 | module_exit(cleanup_pxa2xx_flash); | |
186 | ||
187 | MODULE_LICENSE("GPL"); | |
2f82af08 | 188 | MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); |
e644f7d6 | 189 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |