2 * rbtx4939-flash (based on physmap.c)
4 * This is a simplified physmap driver with map_init callback function.
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.
10 * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/kernel.h>
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>
24 struct rbtx4939_flash_info {
29 static int rbtx4939_flash_remove(struct platform_device *dev)
31 struct rbtx4939_flash_info *info;
33 info = platform_get_drvdata(dev);
38 struct rbtx4939_flash_data *pdata = dev_get_platdata(&dev->dev);
40 mtd_device_unregister(info->mtd);
41 map_destroy(info->mtd);
46 static const char * const rom_probe_types[] = {
47 "cfi_probe", "jedec_probe", NULL };
49 static int rbtx4939_flash_probe(struct platform_device *dev)
51 struct rbtx4939_flash_data *pdata;
52 struct rbtx4939_flash_info *info;
54 const char * const *probe_type;
58 pdata = dev_get_platdata(&dev->dev);
62 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
65 info = devm_kzalloc(&dev->dev, sizeof(struct rbtx4939_flash_info),
70 platform_set_drvdata(dev, info);
72 size = resource_size(res);
73 pr_notice("rbtx4939 platform flash device: %pR\n", res);
75 if (!devm_request_mem_region(&dev->dev, res->start, size,
79 info->map.name = dev_name(&dev->dev);
80 info->map.phys = res->start;
81 info->map.size = size;
82 info->map.bankwidth = pdata->width;
84 info->map.virt = devm_ioremap(&dev->dev, info->map.phys, size);
89 (*pdata->map_init)(&info->map);
91 simple_map_init(&info->map);
93 probe_type = rom_probe_types;
94 for (; !info->mtd && *probe_type; probe_type++)
95 info->mtd = do_map_probe(*probe_type, &info->map);
97 dev_err(&dev->dev, "map_probe failed\n");
101 info->mtd->owner = THIS_MODULE;
102 err = mtd_device_parse_register(info->mtd, NULL, NULL, pdata->parts,
110 rbtx4939_flash_remove(dev);
115 static void rbtx4939_flash_shutdown(struct platform_device *dev)
117 struct rbtx4939_flash_info *info = platform_get_drvdata(dev);
119 if (mtd_suspend(info->mtd) == 0)
120 mtd_resume(info->mtd);
123 #define rbtx4939_flash_shutdown NULL
126 static struct platform_driver rbtx4939_flash_driver = {
127 .probe = rbtx4939_flash_probe,
128 .remove = rbtx4939_flash_remove,
129 .shutdown = rbtx4939_flash_shutdown,
131 .name = "rbtx4939-flash",
132 .owner = THIS_MODULE,
136 module_platform_driver(rbtx4939_flash_driver);
138 MODULE_LICENSE("GPL");
139 MODULE_DESCRIPTION("RBTX4939 MTD map driver");
140 MODULE_ALIAS("platform:rbtx4939-flash");