projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d894b89b GU |
1 | /* |
| 2 | * reset.c -- common ColdFire SoC reset support | |
| 3 | * | |
| 4 | * (C) Copyright 2012, Greg Ungerer <gerg@uclinux.org> | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file COPYING in the main directory of this archive | |
| 8 | * for more details. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/io.h> | |
| 14 | #include <asm/machdep.h> | |
| 15 | #include <asm/coldfire.h> | |
| 16 | #include <asm/mcfsim.h> | |
| 17 | ||
| ae909ea4 GU |
18 | /* |
| 19 | * There are 2 common methods amongst the ColdFure parts for reseting | |
| 20 | * the CPU. But there are couple of exceptions, the 5272 and the 547x | |
| 21 | * have something completely special to them, and we let their specific | |
| 22 | * subarch code handle them. | |
| 23 | */ | |
| 24 | ||
| 25 | #ifdef MCFSIM_SYPCR | |
| 26 | static void mcf_cpu_reset(void) | |
| d894b89b GU |
27 | { |
| 28 | local_irq_disable(); | |
| 29 | /* Set watchdog to soft reset, and enabled */ | |
| e1e362dc | 30 | __raw_writeb(0xc0, MCFSIM_SYPCR); |
| d894b89b GU |
31 | for (;;) |
| 32 | /* wait for watchdog to timeout */; | |
| 33 | } | |
| ae909ea4 GU |
34 | #endif |
| 35 | ||
| 36 | #ifdef MCF_RCR | |
| 37 | static void mcf_cpu_reset(void) | |
| 38 | { | |
| 39 | local_irq_disable(); | |
| 40 | __raw_writeb(MCF_RCR_SWRESET, MCF_RCR); | |
| 41 | } | |
| 42 | #endif | |
| d894b89b GU |
43 | |
| 44 | static int __init mcf_setup_reset(void) | |
| 45 | { | |
| 46 | mach_reset = mcf_cpu_reset; | |
| 47 | return 0; | |
| 48 | } | |
| 49 | ||
| 50 | arch_initcall(mcf_setup_reset); |