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30f59336 KG |
1 | /* |
2 | * misc setup functions for MPC83xx | |
3 | * | |
4 | * Maintainer: Kumar Gala <galak@kernel.crashing.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | */ | |
11 | ||
30f59336 KG |
12 | #include <linux/stddef.h> |
13 | #include <linux/kernel.h> | |
14 | ||
15 | #include <asm/io.h> | |
16 | #include <asm/hw_irq.h> | |
17 | #include <sysdev/fsl_soc.h> | |
18 | ||
19 | #include "mpc83xx.h" | |
20 | ||
c75f902b KG |
21 | static __be32 __iomem *restart_reg_base; |
22 | ||
23 | static int __init mpc83xx_restart_init(void) | |
24 | { | |
25 | /* map reset restart_reg_baseister space */ | |
26 | restart_reg_base = ioremap(get_immrbase() + 0x900, 0xff); | |
27 | ||
28 | return 0; | |
29 | } | |
30 | ||
31 | arch_initcall(mpc83xx_restart_init); | |
32 | ||
30f59336 KG |
33 | void mpc83xx_restart(char *cmd) |
34 | { | |
35 | #define RST_OFFSET 0x00000900 | |
36 | #define RST_PROT_REG 0x00000018 | |
37 | #define RST_CTRL_REG 0x0000001c | |
30f59336 KG |
38 | |
39 | local_irq_disable(); | |
40 | ||
c75f902b KG |
41 | if (restart_reg_base) { |
42 | /* enable software reset "RSTE" */ | |
43 | out_be32(restart_reg_base + (RST_PROT_REG >> 2), 0x52535445); | |
44 | ||
45 | /* set software hard reset */ | |
46 | out_be32(restart_reg_base + (RST_CTRL_REG >> 2), 0x2); | |
47 | } else { | |
48 | printk (KERN_EMERG "Error: Restart registers not mapped, spinning!\n"); | |
49 | } | |
30f59336 | 50 | |
30f59336 KG |
51 | for (;;) ; |
52 | } | |
53 | ||
54 | long __init mpc83xx_time_init(void) | |
55 | { | |
56 | #define SPCR_OFFSET 0x00000110 | |
57 | #define SPCR_TBEN 0x00400000 | |
58 | __be32 __iomem *spcr = ioremap(get_immrbase() + SPCR_OFFSET, 4); | |
59 | __be32 tmp; | |
60 | ||
61 | tmp = in_be32(spcr); | |
62 | out_be32(spcr, tmp | SPCR_TBEN); | |
63 | ||
64 | iounmap(spcr); | |
65 | ||
66 | return 0; | |
67 | } |