Commit | Line | Data |
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610f75e7 AN |
1 | /* |
2 | * rbtx4939-flash (based on physmap.c) | |
3 | * | |
4 | * This is a simplified physmap driver with map_init callback function. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp> | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/kernel.h> | |
610f75e7 AN |
16 | #include <linux/slab.h> |
17 | #include <linux/device.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/mtd/mtd.h> | |
20 | #include <linux/mtd/map.h> | |
21 | #include <linux/mtd/partitions.h> | |
22 | #include <asm/txx9/rbtx4939.h> | |
23 | ||
24 | struct rbtx4939_flash_info { | |
25 | struct mtd_info *mtd; | |
26 | struct map_info map; | |
610f75e7 AN |
27 | }; |
28 | ||
29 | static int rbtx4939_flash_remove(struct platform_device *dev) | |
30 | { | |
31 | struct rbtx4939_flash_info *info; | |
32 | ||
33 | info = platform_get_drvdata(dev); | |
34 | if (!info) | |
35 | return 0; | |
610f75e7 AN |
36 | |
37 | if (info->mtd) { | |
16b0eb15 | 38 | mtd_device_unregister(info->mtd); |
610f75e7 AN |
39 | map_destroy(info->mtd); |
40 | } | |
41 | return 0; | |
42 | } | |
43 | ||
0984c891 AB |
44 | static const char * const rom_probe_types[] = { |
45 | "cfi_probe", "jedec_probe", NULL }; | |
610f75e7 AN |
46 | |
47 | static int rbtx4939_flash_probe(struct platform_device *dev) | |
48 | { | |
49 | struct rbtx4939_flash_data *pdata; | |
50 | struct rbtx4939_flash_info *info; | |
51 | struct resource *res; | |
0984c891 | 52 | const char * const *probe_type; |
610f75e7 AN |
53 | int err = 0; |
54 | unsigned long size; | |
55 | ||
d20d5a57 | 56 | pdata = dev_get_platdata(&dev->dev); |
610f75e7 AN |
57 | if (!pdata) |
58 | return -ENODEV; | |
59 | ||
60 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
61 | if (!res) | |
62 | return -ENODEV; | |
63 | info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info), | |
64 | GFP_KERNEL); | |
65 | if (!info) | |
66 | return -ENOMEM; | |
67 | ||
68 | platform_set_drvdata(dev, info); | |
69 | ||
70 | size = resource_size(res); | |
71 | pr_notice("rbtx4939 platform flash device: %pR\n", res); | |
72 | ||
73 | if (!devm_request_mem_region(&dev->dev, res->start, size, | |
74 | dev_name(&dev->dev))) | |
75 | return -EBUSY; | |
76 | ||
77 | info->map.name = dev_name(&dev->dev); | |
78 | info->map.phys = res->start; | |
79 | info->map.size = size; | |
80 | info->map.bankwidth = pdata->width; | |
81 | ||
82 | info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size); | |
83 | if (!info->map.virt) | |
84 | return -EBUSY; | |
85 | ||
86 | if (pdata->map_init) | |
87 | (*pdata->map_init)(&info->map); | |
88 | else | |
89 | simple_map_init(&info->map); | |
90 | ||
91 | probe_type = rom_probe_types; | |
92 | for (; !info->mtd && *probe_type; probe_type++) | |
93 | info->mtd = do_map_probe(*probe_type, &info->map); | |
94 | if (!info->mtd) { | |
95 | dev_err(&dev->dev, "map_probe failed\n"); | |
96 | err = -ENXIO; | |
97 | goto err_out; | |
98 | } | |
99 | info->mtd->owner = THIS_MODULE; | |
42d7fbe2 AB |
100 | err = mtd_device_parse_register(info->mtd, NULL, NULL, pdata->parts, |
101 | pdata->nr_parts); | |
610f75e7 | 102 | |
c77d8092 DES |
103 | if (err) |
104 | goto err_out; | |
610f75e7 AN |
105 | return 0; |
106 | ||
107 | err_out: | |
108 | rbtx4939_flash_remove(dev); | |
109 | return err; | |
110 | } | |
111 | ||
112 | #ifdef CONFIG_PM | |
610f75e7 AN |
113 | static void rbtx4939_flash_shutdown(struct platform_device *dev) |
114 | { | |
115 | struct rbtx4939_flash_info *info = platform_get_drvdata(dev); | |
116 | ||
079c985e AB |
117 | if (mtd_suspend(info->mtd) == 0) |
118 | mtd_resume(info->mtd); | |
610f75e7 AN |
119 | } |
120 | #else | |
610f75e7 AN |
121 | #define rbtx4939_flash_shutdown NULL |
122 | #endif | |
123 | ||
124 | static struct platform_driver rbtx4939_flash_driver = { | |
125 | .probe = rbtx4939_flash_probe, | |
126 | .remove = rbtx4939_flash_remove, | |
610f75e7 AN |
127 | .shutdown = rbtx4939_flash_shutdown, |
128 | .driver = { | |
129 | .name = "rbtx4939-flash", | |
610f75e7 AN |
130 | }, |
131 | }; | |
132 | ||
f99640de | 133 | module_platform_driver(rbtx4939_flash_driver); |
610f75e7 AN |
134 | |
135 | MODULE_LICENSE("GPL"); | |
136 | MODULE_DESCRIPTION("RBTX4939 MTD map driver"); | |
137 | MODULE_ALIAS("platform:rbtx4939-flash"); |