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.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 42083

6 files changed, 39 insertions, 16 deletions

diff --git a/target/linux/brcm47xx/patches-3.10/144-make-reboot-more-reliable.patch b/target/linux/brcm47xx/patches-3.10/144-make-reboot-more-reliable.patch
index 036de1da3c..f1a343a0cc 100644
--- a/target/linux/brcm47xx/patches-3.10/144-make-reboot-more-reliable.patch
+++ b/target/linux/brcm47xx/patches-3.10/144-make-reboot-more-reliable.patch
@@ -1,17 +1,40 @@
+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
- 	}
diff --git a/target/linux/brcm47xx/patches-3.10/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch b/target/linux/brcm47xx/patches-3.10/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch
index cd726b09e4..ed5695dca3 100644
--- a/target/linux/brcm47xx/patches-3.10/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch
+++ b/target/linux/brcm47xx/patches-3.10/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch
@@ -132,7 +132,7 @@ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 +#endif /* defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM) */
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -214,6 +214,9 @@ void __init plat_mem_setup(void)
+@@ -223,6 +223,9 @@ void __init plat_mem_setup(void)
  		bcm47xx_bus_type = BCM47XX_BUS_TYPE_BCMA;
  		bcm47xx_register_bcma();
  		bcm47xx_set_system_type(bcm47xx_bus.bcma.bus.chipinfo.id);
diff --git a/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch b/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
index b5ff08467a..2cdd887a18 100644
--- a/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
+++ b/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
@@ -22,7 +22,7 @@ Acked-by: Rafa? Mi?ecki <zajec5@gmail.com>
  #include <bcm47xx.h>
  #include <bcm47xx_nvram.h>
  #include <bcm47xx_board.h>
-@@ -234,6 +235,31 @@ void __init plat_mem_setup(void)
+@@ -243,6 +244,31 @@ void __init plat_mem_setup(void)
  	mips_set_machine_name(bcm47xx_board_get_name());
  }
  
diff --git a/target/linux/brcm47xx/patches-3.10/208-b44-use-fixed-PHY-device-if-we-do-not-find-any.patch b/target/linux/brcm47xx/patches-3.10/208-b44-use-fixed-PHY-device-if-we-do-not-find-any.patch
index 7bf236c86f..ae539a3215 100644
--- a/target/linux/brcm47xx/patches-3.10/208-b44-use-fixed-PHY-device-if-we-do-not-find-any.patch
+++ b/target/linux/brcm47xx/patches-3.10/208-b44-use-fixed-PHY-device-if-we-do-not-find-any.patch
@@ -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>
-@@ -260,6 +263,12 @@ static int __init bcm47xx_cpu_fixes(void
+@@ -269,6 +272,12 @@ 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) {
-@@ -278,6 +287,7 @@ static int __init bcm47xx_register_bus_c
+@@ -287,6 +296,7 @@ static int __init bcm47xx_register_bus_c
  	bcm47xx_buttons_register();
  	bcm47xx_leds_register();
  	bcm47xx_workarounds();
diff --git a/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch b/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
index ca5ae5a674..6aaac837cc 100644
--- a/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
+++ b/target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
@@ -8,7 +8,7 @@
  #include <asm/bootinfo.h>
  #include <asm/prom.h>
  #include <asm/reboot.h>
-@@ -269,6 +270,33 @@ static struct fixed_phy_status bcm47xx_f
+@@ -278,6 +279,33 @@ 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) {
-@@ -288,6 +316,7 @@ static int __init bcm47xx_register_bus_c
+@@ -297,6 +325,7 @@ static int __init bcm47xx_register_bus_c
  	bcm47xx_leds_register();
  	bcm47xx_workarounds();
  	fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);
diff --git a/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch b/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
index 650f02f2a1..8bab5f09bf 100644
--- a/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
+++ b/target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
@@ -1,6 +1,6 @@
 --- 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);