3 files changed, 21 insertions, 0 deletions

diff --git a/drivers/ssb/driver_chipcommon.c b/drivers/ssb/driver_chipcommon.c
index 59c3c0fdbecd..59ae76bace14 100644
--- a/drivers/ssb/driver_chipcommon.c
+++ b/drivers/ssb/driver_chipcommon.c
@@ -233,6 +233,8 @@ void ssb_chipcommon_init(struct ssb_chipcommon *cc)
 {
         if (!cc->dev)
                 return; /* We don't have a ChipCommon */
+        if (cc->dev->id.revision >= 11)
+                cc->status = chipco_read32(cc, SSB_CHIPCO_CHIPSTAT);
         ssb_pmu_init(cc);
         chipco_powercontrol_init(cc);
         ssb_chipco_set_clockmode(cc, SSB_CLKMODE_FAST);
diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c
index 9e50896233aa..a4b2b99f2c80 100644
--- a/drivers/ssb/pci.c
+++ b/drivers/ssb/pci.c
@@ -620,6 +620,11 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus,
         int err = -ENOMEM;
         u16 *buf;
 
+        if (!ssb_is_sprom_available(bus)) {
+                ssb_printk(KERN_ERR PFX "No SPROM available!\n");
+                return -ENODEV;
+        }
+
         buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL);
         if (!buf)
                 goto out;
diff --git a/drivers/ssb/sprom.c b/drivers/ssb/sprom.c
index d0e6762fec50..83bc088b941d 100644
--- a/drivers/ssb/sprom.c
+++ b/drivers/ssb/sprom.c
@@ -175,3 +175,17 @@ const struct ssb_sprom *ssb_get_fallback_sprom(void)
 {
         return fallback_sprom;
 }
+
+/* http://bcm-v4.sipsolutions.net/802.11/IsSpromAvailable */
+bool ssb_is_sprom_available(struct ssb_bus *bus)
+{
+        /* status register only exists on chipcomon rev >= 11 and we need check
+           for >= 31 only */
+        /* this routine differs from specs as we do not access SPROM directly
+           on PCMCIA */
+        if (bus->bustype == SSB_BUSTYPE_PCI &&
+            bus->chipco.dev->id.revision >= 31)
+                return bus->chipco.capabilities & SSB_CHIPCO_CAP_SPROM;
+
+        return true;
+}