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 <[email protected]>

SVN-Revision: 42088

target/linux/brcm47xx/patches-3.14/144-make-reboot-more-reliable.patch

@@ -1,17 +1,40 @@
+From 26db431400c336c4cc658cb4888bab18d254c64a Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <[email protected]>
+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 <[email protected]>
+Date:   Mon Jul 28 23:53:57 2014 +0200
+
+    MIPS: BCM47XX: make reboot more relaiable
+
+Signed-off-by: Hauke Mehrtens <[email protected]>
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -59,12 +59,12 @@ static void bcm47xx_machine_restart(char
+@@ -59,7 +59,16 @@ 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
- 	}

target/linux/brcm47xx/patches-3.14/153-MIPS-BCM47XX-Detect-more-then-128-MiB-of-RAM-HIGHMEM.patch

@@ -132,7 +132,7 @@ Signed-off-by: Ralf Baechle <[email protected]>
 +#endif /* defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM) */
 --- a/arch/mips/bcm47xx/setup.c
 +++ b/arch/mips/bcm47xx/setup.c
-@@ -218,6 +218,9 @@ void __init plat_mem_setup(void)
+@@ -227,6 +227,9 @@ 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);

target/linux/brcm47xx/patches-3.14/830-huawei_e970_support.patch

@@ -8,7 +8,7 @@
  #include <asm/bootinfo.h>
  #include <asm/idle.h>
  #include <asm/prom.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_workarounds();
  
  	fixed_phy_add(PHY_POLL, 0, &bcm47xx_fixed_phy_status);

target/linux/brcm47xx/patches-3.14/980-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);