Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e644f7d6 TP |
2 | /* |
3 | * Map driver for Intel XScale PXA2xx platforms. | |
4 | * | |
5 | * Author: Nicolas Pitre | |
6 | * Copyright: (C) 2001 MontaVista Software Inc. | |
e644f7d6 TP |
7 | */ |
8 | ||
9 | #include <linux/module.h> | |
10 | #include <linux/types.h> | |
5a0e3ad6 | 11 | #include <linux/slab.h> |
e644f7d6 | 12 | #include <linux/kernel.h> |
e644f7d6 | 13 | #include <linux/platform_device.h> |
e644f7d6 TP |
14 | #include <linux/mtd/mtd.h> |
15 | #include <linux/mtd/map.h> | |
16 | #include <linux/mtd/partitions.h> | |
17 | ||
18 | #include <asm/io.h> | |
a09e64fb | 19 | #include <mach/hardware.h> |
e644f7d6 TP |
20 | |
21 | #include <asm/mach/flash.h> | |
22 | ||
ccaf5f05 NP |
23 | #define CACHELINESIZE 32 |
24 | ||
e644f7d6 TP |
25 | static void pxa2xx_map_inval_cache(struct map_info *map, unsigned long from, |
26 | ssize_t len) | |
27 | { | |
ccaf5f05 NP |
28 | unsigned long start = (unsigned long)map->cached + from; |
29 | unsigned long end = start + len; | |
30 | ||
31 | start &= ~(CACHELINESIZE - 1); | |
32 | while (start < end) { | |
33 | /* invalidate D cache line */ | |
34 | asm volatile ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)); | |
35 | start += CACHELINESIZE; | |
36 | } | |
e644f7d6 TP |
37 | } |
38 | ||
39 | struct pxa2xx_flash_info { | |
e644f7d6 TP |
40 | struct mtd_info *mtd; |
41 | struct map_info map; | |
42 | }; | |
43 | ||
0984c891 | 44 | static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; |
e644f7d6 | 45 | |
06f25510 | 46 | static int pxa2xx_flash_probe(struct platform_device *pdev) |
e644f7d6 | 47 | { |
d20d5a57 | 48 | struct flash_platform_data *flash = dev_get_platdata(&pdev->dev); |
e644f7d6 | 49 | struct pxa2xx_flash_info *info; |
e644f7d6 | 50 | struct resource *res; |
e644f7d6 TP |
51 | |
52 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
53 | if (!res) | |
54 | return -ENODEV; | |
55 | ||
2bfefa4c | 56 | info = kzalloc(sizeof(struct pxa2xx_flash_info), GFP_KERNEL); |
e644f7d6 TP |
57 | if (!info) |
58 | return -ENOMEM; | |
59 | ||
7c4bb4f8 | 60 | info->map.name = flash->name; |
e644f7d6 TP |
61 | info->map.bankwidth = flash->width; |
62 | info->map.phys = res->start; | |
28f65c11 | 63 | info->map.size = resource_size(res); |
e644f7d6 TP |
64 | |
65 | info->map.virt = ioremap(info->map.phys, info->map.size); | |
66 | if (!info->map.virt) { | |
67 | printk(KERN_WARNING "Failed to ioremap %s\n", | |
68 | info->map.name); | |
69 | return -ENOMEM; | |
70 | } | |
7769aea2 AB |
71 | info->map.cached = |
72 | ioremap_cached(info->map.phys, info->map.size); | |
e644f7d6 TP |
73 | if (!info->map.cached) |
74 | printk(KERN_WARNING "Failed to ioremap cached %s\n", | |
75 | info->map.name); | |
76 | info->map.inval_cache = pxa2xx_map_inval_cache; | |
77 | simple_map_init(&info->map); | |
78 | ||
79 | printk(KERN_NOTICE | |
80 | "Probing %s at physical address 0x%08lx" | |
81 | " (%d-bit bankwidth)\n", | |
82 | info->map.name, (unsigned long)info->map.phys, | |
83 | info->map.bankwidth * 8); | |
84 | ||
85 | info->mtd = do_map_probe(flash->map_name, &info->map); | |
86 | ||
87 | if (!info->mtd) { | |
88 | iounmap((void *)info->map.virt); | |
89 | if (info->map.cached) | |
90 | iounmap(info->map.cached); | |
91 | return -EIO; | |
92 | } | |
2451581f | 93 | info->mtd->dev.parent = &pdev->dev; |
e644f7d6 | 94 | |
42d7fbe2 AB |
95 | mtd_device_parse_register(info->mtd, probes, NULL, flash->parts, |
96 | flash->nr_parts); | |
e644f7d6 | 97 | |
7a192ec3 | 98 | platform_set_drvdata(pdev, info); |
e644f7d6 TP |
99 | return 0; |
100 | } | |
101 | ||
810b7e06 | 102 | static int pxa2xx_flash_remove(struct platform_device *dev) |
e644f7d6 | 103 | { |
7a192ec3 | 104 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 105 | |
3dfad123 | 106 | mtd_device_unregister(info->mtd); |
e644f7d6 TP |
107 | |
108 | map_destroy(info->mtd); | |
109 | iounmap(info->map.virt); | |
110 | if (info->map.cached) | |
7769aea2 | 111 | iounmap(info->map.cached); |
e644f7d6 TP |
112 | kfree(info); |
113 | return 0; | |
114 | } | |
115 | ||
116 | #ifdef CONFIG_PM | |
7a192ec3 | 117 | static void pxa2xx_flash_shutdown(struct platform_device *dev) |
e644f7d6 | 118 | { |
7a192ec3 | 119 | struct pxa2xx_flash_info *info = platform_get_drvdata(dev); |
e644f7d6 | 120 | |
3fe4bae8 | 121 | if (info && mtd_suspend(info->mtd) == 0) |
ead995f8 | 122 | mtd_resume(info->mtd); |
e644f7d6 TP |
123 | } |
124 | #else | |
e644f7d6 TP |
125 | #define pxa2xx_flash_shutdown NULL |
126 | #endif | |
127 | ||
7a192ec3 ML |
128 | static struct platform_driver pxa2xx_flash_driver = { |
129 | .driver = { | |
130 | .name = "pxa2xx-flash", | |
7a192ec3 | 131 | }, |
e644f7d6 | 132 | .probe = pxa2xx_flash_probe, |
5153b88c | 133 | .remove = pxa2xx_flash_remove, |
e644f7d6 TP |
134 | .shutdown = pxa2xx_flash_shutdown, |
135 | }; | |
136 | ||
f99640de | 137 | module_platform_driver(pxa2xx_flash_driver); |
e644f7d6 TP |
138 | |
139 | MODULE_LICENSE("GPL"); | |
2f82af08 | 140 | MODULE_AUTHOR("Nicolas Pitre <nico@fluxnic.net>"); |
e644f7d6 | 141 | MODULE_DESCRIPTION("MTD map driver for Intel XScale PXA2xx"); |