From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 1 Dec 2013 18:05:08 +0000 (+0000)
Subject: brcm47xx: deactivate mips wait instruction only for BCM4706
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c48f2851473bf24cdfec371c5857826eaa6007b5;p=openwrt%2Fstaging%2Faparcar.git

brcm47xx: deactivate mips wait instruction only for BCM4706

The wait instruction is only broken on the BCM4706 and not on the other
similar SoCs.

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

SVN-Revision: 38979
---

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 7715cf2bbc..c585faf8bb 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
@@ -1,12 +1,26 @@
---- a/arch/mips/kernel/idle.c
-+++ b/arch/mips/kernel/idle.c
-@@ -188,9 +188,6 @@ void __init check_wait(void)
- 		break;
+--- a/arch/mips/bcm47xx/setup.c
++++ b/arch/mips/bcm47xx/setup.c
+@@ -35,6 +35,7 @@
+ #include <asm/prom.h>
+ #include <asm/reboot.h>
+ #include <asm/time.h>
++#include <asm/idle.h>
+ #include <bcm47xx.h>
+ #include <bcm47xx_nvram.h>
+ #include <bcm47xx_board.h>
+@@ -214,6 +215,15 @@ static void __init bcm47xx_register_bcma
+ 		panic("Failed to initialize BCMA bus (err %d)", err);
  
- 	case CPU_74K:
--		cpu_wait = r4k_wait;
--		if ((c->processor_id & 0xff) >= PRID_REV_ENCODE_332(2, 1, 0))
--			cpu_wait = r4k_wait_irqoff;
- 		break;
+ 	bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
++
++	/* The BCM4706 has a problem with the CPU wait instruction.
++	 * When r4k_wait or r4k_wait_irqoff is used will just hang and 
++	 * not return from a msleep(). Removing the cpu_wait 
++	 * functionality is a workaround for this problem. The BCM4716 
++	 * does not have this problem.
++	 */
++	if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
++		cpu_wait = NULL;
+ }
+ #endif
  
- 	case CPU_TX49XX:
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 2ff649dde5..4cae1eac75 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>
-@@ -244,6 +245,33 @@ void __init plat_mem_setup(void)
+@@ -254,6 +255,33 @@ void __init plat_mem_setup(void)
  	mips_set_machine_name(bcm47xx_board_get_name());
  }
  
@@ -42,7 +42,7 @@
  static int __init bcm47xx_register_bus_complete(void)
  {
  	switch (bcm47xx_bus_type) {
-@@ -258,6 +286,8 @@ static int __init bcm47xx_register_bus_c
+@@ -268,6 +296,8 @@ static int __init bcm47xx_register_bus_c
  		break;
  #endif
  	}
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 069a0fa7a2..f30a4fbd75 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
-@@ -121,6 +121,10 @@ static int bcm47xx_get_invariants(struct
+@@ -122,6 +122,10 @@ static int bcm47xx_get_invariants(struct
  	if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
  		iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);