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> | |
16 | #include <linux/init.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/mtd/mtd.h> | |
21 | #include <linux/mtd/map.h> | |
22 | #include <linux/mtd/partitions.h> | |
23 | #include <asm/txx9/rbtx4939.h> | |
24 | ||
25 | struct rbtx4939_flash_info { | |
26 | struct mtd_info *mtd; | |
27 | struct map_info map; | |
610f75e7 AN |
28 | }; |
29 | ||
30 | static int rbtx4939_flash_remove(struct platform_device *dev) | |
31 | { | |
32 | struct rbtx4939_flash_info *info; | |
33 | ||
34 | info = platform_get_drvdata(dev); | |
35 | if (!info) | |
36 | return 0; | |
37 | platform_set_drvdata(dev, NULL); | |
38 | ||
39 | if (info->mtd) { | |
610f75e7 AN |
40 | struct rbtx4939_flash_data *pdata = dev->dev.platform_data; |
41 | ||
16b0eb15 | 42 | mtd_device_unregister(info->mtd); |
610f75e7 AN |
43 | map_destroy(info->mtd); |
44 | } | |
45 | return 0; | |
46 | } | |
47 | ||
48 | static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL }; | |
610f75e7 AN |
49 | |
50 | static int rbtx4939_flash_probe(struct platform_device *dev) | |
51 | { | |
52 | struct rbtx4939_flash_data *pdata; | |
53 | struct rbtx4939_flash_info *info; | |
54 | struct resource *res; | |
55 | const char **probe_type; | |
56 | int err = 0; | |
57 | unsigned long size; | |
58 | ||
59 | pdata = dev->dev.platform_data; | |
60 | if (!pdata) | |
61 | return -ENODEV; | |
62 | ||
63 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
64 | if (!res) | |
65 | return -ENODEV; | |
66 | info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info), | |
67 | GFP_KERNEL); | |
68 | if (!info) | |
69 | return -ENOMEM; | |
70 | ||
71 | platform_set_drvdata(dev, info); | |
72 | ||
73 | size = resource_size(res); | |
74 | pr_notice("rbtx4939 platform flash device: %pR\n", res); | |
75 | ||
76 | if (!devm_request_mem_region(&dev->dev, res->start, size, | |
77 | dev_name(&dev->dev))) | |
78 | return -EBUSY; | |
79 | ||
80 | info->map.name = dev_name(&dev->dev); | |
81 | info->map.phys = res->start; | |
82 | info->map.size = size; | |
83 | info->map.bankwidth = pdata->width; | |
84 | ||
85 | info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size); | |
86 | if (!info->map.virt) | |
87 | return -EBUSY; | |
88 | ||
89 | if (pdata->map_init) | |
90 | (*pdata->map_init)(&info->map); | |
91 | else | |
92 | simple_map_init(&info->map); | |
93 | ||
94 | probe_type = rom_probe_types; | |
95 | for (; !info->mtd && *probe_type; probe_type++) | |
96 | info->mtd = do_map_probe(*probe_type, &info->map); | |
97 | if (!info->mtd) { | |
98 | dev_err(&dev->dev, "map_probe failed\n"); | |
99 | err = -ENXIO; | |
100 | goto err_out; | |
101 | } | |
102 | info->mtd->owner = THIS_MODULE; | |
103 | if (err) | |
104 | goto err_out; | |
c77d8092 DES |
105 | err = mtd_device_parse_register(info->mtd, NULL, 0, |
106 | pdata->parts, pdata->nr_parts); | |
610f75e7 | 107 | |
c77d8092 DES |
108 | if (err) |
109 | goto err_out; | |
610f75e7 AN |
110 | return 0; |
111 | ||
112 | err_out: | |
113 | rbtx4939_flash_remove(dev); | |
114 | return err; | |
115 | } | |
116 | ||
117 | #ifdef CONFIG_PM | |
610f75e7 AN |
118 | static void rbtx4939_flash_shutdown(struct platform_device *dev) |
119 | { | |
120 | struct rbtx4939_flash_info *info = platform_get_drvdata(dev); | |
121 | ||
122 | if (info->mtd->suspend && info->mtd->resume) | |
123 | if (info->mtd->suspend(info->mtd) == 0) | |
124 | info->mtd->resume(info->mtd); | |
125 | } | |
126 | #else | |
610f75e7 AN |
127 | #define rbtx4939_flash_shutdown NULL |
128 | #endif | |
129 | ||
130 | static struct platform_driver rbtx4939_flash_driver = { | |
131 | .probe = rbtx4939_flash_probe, | |
132 | .remove = rbtx4939_flash_remove, | |
610f75e7 AN |
133 | .shutdown = rbtx4939_flash_shutdown, |
134 | .driver = { | |
135 | .name = "rbtx4939-flash", | |
136 | .owner = THIS_MODULE, | |
137 | }, | |
138 | }; | |
139 | ||
f99640de | 140 | module_platform_driver(rbtx4939_flash_driver); |
610f75e7 AN |
141 | |
142 | MODULE_LICENSE("GPL"); | |
143 | MODULE_DESCRIPTION("RBTX4939 MTD map driver"); | |
144 | MODULE_ALIAS("platform:rbtx4939-flash"); |