Linux 2.6.31-rc6
[linux-2.6] / arch / arm / mach-ns9xxx / processor-ns9360.c
1 /*
2  * arch/arm/mach-ns9xxx/processor-ns9360.c
3  *
4  * Copyright (C) 2007 by Digi International Inc.
5  * All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License version 2 as published by
9  * the Free Software Foundation.
10  */
11 #include <linux/io.h>
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14
15 #include <asm/page.h>
16 #include <asm/mach/map.h>
17 #include <mach/processor-ns9360.h>
18 #include <mach/regs-sys-ns9360.h>
19
20 void ns9360_reset(char mode)
21 {
22         u32 reg;
23
24         reg = __raw_readl(SYS_PLL) >> 16;
25         REGSET(reg, SYS_PLL, SWC, YES);
26         __raw_writel(reg, SYS_PLL);
27 }
28
29 #define CRYSTAL 29491200 /* Hz */
30 unsigned long ns9360_systemclock(void)
31 {
32         u32 pll = __raw_readl(SYS_PLL);
33         return CRYSTAL * (REGGETIM(pll, SYS_PLL, ND) + 1)
34                 >> REGGETIM(pll, SYS_PLL, FS);
35 }
36
37 static struct map_desc ns9360_io_desc[] __initdata = {
38         { /* BBus */
39                 .virtual = io_p2v(0x90000000),
40                 .pfn = __phys_to_pfn(0x90000000),
41                 .length = 0x00700000,
42                 .type = MT_DEVICE,
43         }, { /* AHB */
44                 .virtual = io_p2v(0xa0100000),
45                 .pfn = __phys_to_pfn(0xa0100000),
46                 .length = 0x00900000,
47                 .type = MT_DEVICE,
48         },
49 };
50
51 void __init ns9360_map_io(void)
52 {
53         iotable_init(ns9360_io_desc, ARRAY_SIZE(ns9360_io_desc));
54 }