2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * EBU - the external bus unit attaches PCI, NOR and NAND
8 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/ioport.h>
15 #include <lantiq_soc.h>
17 static struct resource ltq_ebu_resource
= {
19 .start
= LTQ_EBU_BASE_ADDR
,
20 .end
= LTQ_EBU_BASE_ADDR
+ LTQ_EBU_SIZE
- 1,
21 .flags
= IORESOURCE_MEM
,
24 /* remapped base addr of the clock unit and external bus unit */
25 void __iomem
*ltq_ebu_membase
;
27 static int __init
lantiq_ebu_init(void)
29 /* insert and request the memory region */
30 if (insert_resource(&iomem_resource
, <q_ebu_resource
) < 0)
31 panic("Failed to insert ebu memory");
33 if (request_mem_region(ltq_ebu_resource
.start
,
34 resource_size(<q_ebu_resource
), "ebu") < 0)
35 panic("Failed to request ebu memory");
37 /* remap ebu register range */
38 ltq_ebu_membase
= ioremap_nocache(ltq_ebu_resource
.start
,
39 resource_size(<q_ebu_resource
));
41 panic("Failed to remap ebu memory");
43 /* make sure to unprotect the memory region where flash is located */
44 ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0
) & ~EBU_WRDIS
, LTQ_EBU_BUSCON0
);
48 postcore_initcall(lantiq_ebu_init
);