Commit 5cd22bc5 authored by hauke's avatar hauke
Browse files

brcm47xx: fix reboot problem on BCM4705/BCM4785



This adds some code based on code from the Broadcom GPL tar to fix the
reboot problems on BCM4705/BCM4785. I tried rebooting my device for ~10
times and have never seen a problem. This reverts the changes in the
previous commit and adds the real fix as suggested by Rafał.

Setting bit 22 in Reg 22, sel 4 puts the BIU (Bus Interface Unit) into
async mode.

backport of: r42083
Signed-off-by: default avatarHauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42086 3c298f89-4303-0410-b956-a3cf2f4a3e73
parent 9d93edf4
From 26db431400c336c4cc658cb4888bab18d254c64a Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sat, 9 Aug 2014 00:00:09 +0200
Subject: [PATCH] MIPS: BCM47XX: fix reboot problem on BCM4705/BCM4785
This adds some code based on code from the Broadcom GPL tar to fix the
reboot problems on BCM4705/BCM4785. I tried rebooting my device for ~10
times and have never seen a problem. This reverts the changes in the
previous commit and adds the real fix as suggested by Rafał.
Setting bit 22 in Reg 22, sel 4 puts the BIU (Bus Interface Unit) into
async mode.
The previous try was this:
commit 316cad5c1d4daee998cd1f83ccdb437f6f20d45c
Author: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon Jul 28 23:53:57 2014 +0200
MIPS: BCM47XX: make reboot more relaiable
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -55,12 +55,12 @@ static void bcm47xx_machine_restart(char
@@ -55,7 +55,16 @@ static void bcm47xx_machine_restart(char
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
- ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
+ ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 3);
+ if (bcm47xx_bus.bcma.bus.chipinfo.id == 0x4785)
+ write_c0_diag4(1 << 22);
ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1);
+ if (bcm47xx_bus.bcma.bus.chipinfo.id == 0x4785) {
+ __asm__ __volatile__(
+ ".set\tmips3\n\t"
+ "sync\n\t"
+ "wait\n\t"
+ ".set\tmips0");
+ }
break;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
- bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1);
+ bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 3);
break;
#endif
}
......@@ -22,7 +22,7 @@ Acked-by: Rafa? Mi?ecki <zajec5@gmail.com>
#include <bcm47xx.h>
#include <bcm47xx_nvram.h>
#include <bcm47xx_board.h>
@@ -231,6 +232,31 @@ void __init plat_mem_setup(void)
@@ -240,6 +241,31 @@ void __init plat_mem_setup(void)
mips_set_machine_name(bcm47xx_board_get_name());
}
......
......@@ -30,7 +30,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/bcma/bcma_soc.h>
@@ -257,6 +260,12 @@ static int __init bcm47xx_cpu_fixes(void
@@ -266,6 +269,12 @@ static int __init bcm47xx_cpu_fixes(void
}
arch_initcall(bcm47xx_cpu_fixes);
......@@ -43,7 +43,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
@@ -275,6 +284,7 @@ static int __init bcm47xx_register_bus_c
@@ -284,6 +293,7 @@ static int __init bcm47xx_register_bus_c
bcm47xx_buttons_register();
bcm47xx_leds_register();
bcm47xx_workarounds();
......
......@@ -8,7 +8,7 @@
#include <asm/bootinfo.h>
#include <asm/prom.h>
#include <asm/reboot.h>
@@ -266,6 +267,33 @@ static struct fixed_phy_status bcm47xx_f
@@ -275,6 +276,33 @@ static struct fixed_phy_status bcm47xx_f
.duplex = DUPLEX_FULL,
};
......@@ -42,7 +42,7 @@
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
@@ -285,6 +313,7 @@ static int __init bcm47xx_register_bus_c
@@ -294,6 +322,7 @@ static int __init bcm47xx_register_bus_c
bcm47xx_leds_register();
bcm47xx_workarounds();
fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
......
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -127,6 +127,10 @@ static int bcm47xx_get_invariants(struct
@@ -136,6 +136,10 @@ static int bcm47xx_get_invariants(struct
if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);
......
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