Commit e1c1575f authored by Kumar Gala's avatar Kumar Gala
Browse files

[POWERPC] 85xx/86xx: refactor RSTCR reset code



On the majority of 85xx & 86xx we have a register that's ability to
assert HRESET_REQ to reset the board.  We refactored that code so it
can be shared between both platforms into fsl_soc.c and removed all
the duplication in each platform directory.
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent c9438aff
......@@ -214,6 +214,12 @@
device_type = "open-pic";
big-endian;
};
global-utilities@e0000 {
compatible = "fsl,mpc8641-guts";
reg = <e0000 1000>;
fsl,has-rstcr;
};
};
pcie@f8008000 {
......
#
# Makefile for the PowerPC 85xx linux kernel.
#
obj-$(CONFIG_PPC_85xx) += misc.o
obj-$(CONFIG_MPC8540_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC8560_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC85xx_CDS) += mpc85xx_cds.o
......
/*
* MPC85xx generic code.
*
* Maintained by Kumar Gala (see MAINTAINERS for contact information)
*
* Copyright 2005 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/irq.h>
#include <linux/module.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <sysdev/fsl_soc.h>
static __be32 __iomem *rstcr;
extern void abort(void);
static int __init mpc85xx_rstcr(void)
{
struct device_node *np;
np = of_find_node_by_name(NULL, "global-utilities");
if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
const u32 *prop = of_get_property(np, "reg", NULL);
if (prop) {
/* map reset control register
* 0xE00B0 is offset of reset control register
*/
rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
if (!rstcr)
printk (KERN_EMERG "Error: reset control "
"register not mapped!\n");
}
} else
printk (KERN_INFO "rstcr compatible register does not exist!\n");
if (np)
of_node_put(np);
return 0;
}
arch_initcall(mpc85xx_rstcr);
void mpc85xx_restart(char *cmd)
{
local_irq_disable();
if (rstcr)
/* set reset control register */
out_be32(rstcr, 0x2); /* HRESET_REQ */
abort();
}
/*
* arch/powerpc/platforms/85xx/mpc85xx.h
*
* MPC85xx soc definitions/function decls
*
* Maintainer: Kumar Gala <kumar.gala@freescale.com>
*
* Copyright 2005 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
extern void mpc85xx_restart(char *);
......@@ -30,7 +30,6 @@
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
#ifdef CONFIG_CPM2
#include <linux/fs_enet_pd.h>
......@@ -249,7 +248,7 @@ define_machine(mpc85xx_ads) {
.init_IRQ = mpc85xx_ads_pic_init,
.show_cpuinfo = mpc85xx_ads_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
......@@ -46,7 +46,6 @@
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
static int cds_pci_slot = 2;
static volatile u8 *cadmus;
......@@ -96,7 +95,7 @@ static void mpc85xx_cds_restart(char *cmd)
* If we can't find the VIA chip (maybe the P2P bridge is disabled)
* or the VIA chip reset didn't work, just use the default reset.
*/
mpc85xx_restart(NULL);
fsl_rstcr_restart(NULL);
}
static void __init mpc85xx_cds_pci_irq_fixup(struct pci_dev *dev)
......@@ -343,7 +342,7 @@ define_machine(mpc85xx_cds) {
.restart = mpc85xx_cds_restart,
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#else
.restart = mpc85xx_restart,
.restart = fsl_rstcr_restart,
#endif
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
......
......@@ -33,7 +33,6 @@
#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>
#include "mpc85xx.h"
#undef DEBUG
......@@ -211,7 +210,7 @@ define_machine(mpc8544_ds) {
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#endif
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
......@@ -225,7 +224,7 @@ define_machine(mpc8572_ds) {
.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
#endif
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
};
......@@ -50,8 +50,6 @@
#include <asm/qe_ic.h>
#include <asm/mpic.h>
#include "mpc85xx.h"
#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
......@@ -200,7 +198,7 @@ define_machine(mpc85xx_mds) {
.setup_arch = mpc85xx_mds_setup_arch,
.init_IRQ = mpc85xx_mds_pic_init,
.get_irq = mpic_get_irq,
.restart = mpc85xx_restart,
.restart = fsl_rstcr_restart,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
#ifdef CONFIG_PCI
......
......@@ -37,8 +37,6 @@
#include <sysdev/fsl_pci.h>
#include <sysdev/fsl_soc.h>
#define MPC86XX_RSTCR_OFFSET (0xe00b0) /* Reset Control Register */
void __init
mpc86xx_hpcd_init_irq(void)
{
......@@ -187,21 +185,6 @@ static int __init mpc86xx_hpcd_probe(void)
return 0;
}
void
mpc86xx_restart(char *cmd)
{
void __iomem *rstcr;
rstcr = ioremap(get_immrbase() + MPC86XX_RSTCR_OFFSET, 0x100);
local_irq_disable();
/* Assert reset request to Reset Control Register */
out_be32(rstcr, 0x2);
/* not reached */
}
long __init
mpc86xx_time_init(void)
{
......@@ -225,7 +208,7 @@ define_machine(mpc86xx_hpcd) {
.setup_arch = mpc86xx_hpcd_setup_arch,
.init_IRQ = mpc86xx_hpcd_init_irq,
.get_irq = mpic_get_irq,
.restart = mpc86xx_restart,
.restart = fsl_rstcr_restart,
.time_init = mpc86xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
......
/*
* MPC8641 HPCN board definitions
*
* Copyright 2006 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Author: Xianghua Xiao <x.xiao@freescale.com>
*/
#ifndef __MPC8641_HPCN_H__
#define __MPC8641_HPCN_H__
#include <linux/init.h>
#define MPC86XX_RSTCR_OFFSET (0xe00b0) /* Reset Control Register */
#endif /* __MPC8641_HPCN_H__ */
......@@ -35,7 +35,6 @@
#include <sysdev/fsl_soc.h>
#include "mpc86xx.h"
#include "mpc8641_hpcn.h"
#undef DEBUG
......@@ -196,23 +195,6 @@ static int __init mpc86xx_hpcn_probe(void)
return 0;
}
void
mpc86xx_restart(char *cmd)
{
void __iomem *rstcr;
rstcr = ioremap(get_immrbase() + MPC86XX_RSTCR_OFFSET, 0x100);
local_irq_disable();
/* Assert reset request to Reset Control Register */
out_be32(rstcr, 0x2);
/* not reached */
}
long __init
mpc86xx_time_init(void)
{
......@@ -237,7 +219,7 @@ define_machine(mpc86xx_hpcn) {
.init_IRQ = mpc86xx_hpcn_init_irq,
.show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = mpc86xx_restart,
.restart = fsl_rstcr_restart,
.time_init = mpc86xx_time_init,
.calibrate_decr = generic_calibrate_decr,
.progress = udbg_progress,
......
......@@ -1298,3 +1298,41 @@ err:
return spi_register_board_info(board_infos, num_board_infos);
}
#if defined(CONFIG_PPC_85xx) || defined(CONFIG_PPC_86xx)
static __be32 __iomem *rstcr;
static int __init setup_rstcr(void)
{
struct device_node *np;
np = of_find_node_by_name(NULL, "global-utilities");
if ((np && of_get_property(np, "fsl,has-rstcr", NULL))) {
const u32 *prop = of_get_property(np, "reg", NULL);
if (prop) {
/* map reset control register
* 0xE00B0 is offset of reset control register
*/
rstcr = ioremap(get_immrbase() + *prop + 0xB0, 0xff);
if (!rstcr)
printk (KERN_EMERG "Error: reset control "
"register not mapped!\n");
}
} else
printk (KERN_INFO "rstcr compatible register does not exist!\n");
if (np)
of_node_put(np);
return 0;
}
arch_initcall(setup_rstcr);
void fsl_rstcr_restart(char *cmd)
{
local_irq_disable();
if (rstcr)
/* set reset control register */
out_be32(rstcr, 0x2); /* HRESET_REQ */
while (1) ;
}
#endif
......@@ -15,5 +15,6 @@ extern int fsl_spi_init(struct spi_board_info *board_infos,
void (*activate_cs)(u8 cs, u8 polarity),
void (*deactivate_cs)(u8 cs, u8 polarity));
extern void fsl_rstcr_restart(char *cmd);
#endif
#endif
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