nfsd4: typo logical vs bitwise negate for want_mask
[linux-btrfs-devel.git] / arch / mips / lantiq / xway / ebu.c
blob66eb52fa50a16d3590131ee098b159acf3e63190
1 /*
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>
9 */
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/version.h>
14 #include <linux/ioport.h>
16 #include <lantiq_soc.h>
18 /* all access to the ebu must be locked */
19 DEFINE_SPINLOCK(ebu_lock);
20 EXPORT_SYMBOL_GPL(ebu_lock);
22 static struct resource ltq_ebu_resource = {
23 .name = "ebu",
24 .start = LTQ_EBU_BASE_ADDR,
25 .end = LTQ_EBU_BASE_ADDR + LTQ_EBU_SIZE - 1,
26 .flags = IORESOURCE_MEM,
29 /* remapped base addr of the clock unit and external bus unit */
30 void __iomem *ltq_ebu_membase;
32 static int __init lantiq_ebu_init(void)
34 /* insert and request the memory region */
35 if (insert_resource(&iomem_resource, &ltq_ebu_resource) < 0)
36 panic("Failed to insert ebu memory\n");
38 if (request_mem_region(ltq_ebu_resource.start,
39 resource_size(&ltq_ebu_resource), "ebu") < 0)
40 panic("Failed to request ebu memory\n");
42 /* remap ebu register range */
43 ltq_ebu_membase = ioremap_nocache(ltq_ebu_resource.start,
44 resource_size(&ltq_ebu_resource));
45 if (!ltq_ebu_membase)
46 panic("Failed to remap ebu memory\n");
48 /* make sure to unprotect the memory region where flash is located */
49 ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_BUSCON0) & ~EBU_WRDIS, LTQ_EBU_BUSCON0);
50 return 0;
53 postcore_initcall(lantiq_ebu_init);