ssb: Fix watchdog access for devices without a chipcommon

This fixes the SSB watchdog access for devices without a chipcommon.
These devices have the watchdog on the extif.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 63 insertions, 0 deletions

diff --git a/drivers/ssb/Kconfig b/drivers/ssb/Kconfig
index d976660cb7f0..78fd33125e02 100644
--- a/drivers/ssb/Kconfig
+++ b/drivers/ssb/Kconfig
@@ -105,6 +105,12 @@ config SSB_DRIVER_MIPS
 
           If unsure, say N
 
+# Assumption: We are on embedded, if we compile the MIPS core.
+config SSB_EMBEDDED
+        bool
+        depends on SSB_DRIVER_MIPS
+        default y
+
 config SSB_DRIVER_EXTIF
         bool "SSB Broadcom EXTIF core driver (EXPERIMENTAL)"
         depends on SSB_DRIVER_MIPS && EXPERIMENTAL
diff --git a/drivers/ssb/Makefile b/drivers/ssb/Makefile
index 7be397595805..e235144add7c 100644
--- a/drivers/ssb/Makefile
+++ b/drivers/ssb/Makefile
@@ -1,5 +1,6 @@
 # core
 ssb-y                                   += main.o scan.o
+ssb-$(CONFIG_SSB_EMBEDDED)              += embedded.o
 
 # host support
 ssb-$(CONFIG_SSB_PCIHOST)               += pci.o pcihost_wrapper.o
diff --git a/drivers/ssb/driver_extif.c b/drivers/ssb/driver_extif.c
index fe55eb8b038a..b1899f422a54 100644
--- a/drivers/ssb/driver_extif.c
+++ b/drivers/ssb/driver_extif.c
@@ -110,6 +110,12 @@ void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
         *m = extif_read32(extif, SSB_EXTIF_CLOCK_SB);
 }
 
+void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
+                                  u32 ticks)
+{
+        extif_write32(extif, SSB_EXTIF_WATCHDOG, ticks);
+}
+
 u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask)
 {
         return extif_read32(extif, SSB_EXTIF_GPIO_IN) & mask;
diff --git a/drivers/ssb/embedded.c b/drivers/ssb/embedded.c
new file mode 100644
index 000000000000..751f58ac612c
--- /dev/null
+++ b/drivers/ssb/embedded.c
@@ -0,0 +1,26 @@
+/*
+ * Sonics Silicon Backplane
+ * Embedded systems support code
+ *
+ * Copyright 2005-2008, Broadcom Corporation
+ * Copyright 2006-2008, Michael Buesch <mb@bu3sch.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_embedded.h>
+
+
+int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks)
+{
+        if (ssb_chipco_available(&bus->chipco)) {
+                ssb_chipco_watchdog_timer_set(&bus->chipco, ticks);
+                return 0;
+        }
+        if (ssb_extif_available(&bus->extif)) {
+                ssb_extif_watchdog_timer_set(&bus->extif, ticks);
+                return 0;
+        }
+        return -ENODEV;
+}
diff --git a/include/linux/ssb/ssb_driver_chipcommon.h b/include/linux/ssb/ssb_driver_chipcommon.h
index 35717b400cef..89638153cbe1 100644
--- a/include/linux/ssb/ssb_driver_chipcommon.h
+++ b/include/linux/ssb/ssb_driver_chipcommon.h
@@ -360,6 +360,11 @@ struct ssb_chipcommon {
         u16 fast_pwrup_delay;
 };
 
+static inline bool ssb_chipco_available(struct ssb_chipcommon *cc)
+{
+        return (cc->dev != NULL);
+}
+
 extern void ssb_chipcommon_init(struct ssb_chipcommon *cc);
 
 #include <linux/pm.h>
diff --git a/include/linux/ssb/ssb_driver_extif.h b/include/linux/ssb/ssb_driver_extif.h
index a9164357b5ae..0d7c9bfa965d 100644
--- a/include/linux/ssb/ssb_driver_extif.h
+++ b/include/linux/ssb/ssb_driver_extif.h
@@ -171,6 +171,9 @@ extern void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
 extern void ssb_extif_timing_init(struct ssb_extif *extif,
                                   unsigned long ns);
 
+extern void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
+                                         u32 ticks);
+
 u32 ssb_extif_gpio_in(struct ssb_extif *extif, u32 mask);
 
 void ssb_extif_gpio_out(struct ssb_extif *extif, u32 mask, u32 value);
@@ -200,5 +203,11 @@ void ssb_extif_get_clockcontrol(struct ssb_extif *extif,
 {
 }
 
+static inline
+void ssb_extif_watchdog_timer_set(struct ssb_extif *extif,
+                                  u32 ticks)
+{
+}
+
 #endif /* CONFIG_SSB_DRIVER_EXTIF */
 #endif /* LINUX_SSB_EXTIFCORE_H_ */
diff --git a/include/linux/ssb/ssb_embedded.h b/include/linux/ssb/ssb_embedded.h
new file mode 100644
index 000000000000..80bd58496450
--- /dev/null
+++ b/include/linux/ssb/ssb_embedded.h
@@ -0,0 +1,10 @@
+#ifndef LINUX_SSB_EMBEDDED_H_
+#define LINUX_SSB_EMBEDDED_H_
+
+#include <linux/types.h>
+#include <linux/ssb/ssb.h>
+
+
+extern int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks);
+
+#endif /* LINUX_SSB_EMBEDDED_H_ */