ssb-pcmcia: IRQ and DMA related fixes

Here come some IRQ and DMA related fixes for the ssb PCMCIA-host code.
Not much to say, actually. I think the patch explains itself.

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

2 files changed, 23 insertions, 15 deletions

diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index e12371916444..2fcfd73b3b6e 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -1064,9 +1064,9 @@ u32 ssb_dma_translation(struct ssb_device *dev)
 {
         switch (dev->bus->bustype) {
         case SSB_BUSTYPE_SSB:
+        case SSB_BUSTYPE_PCMCIA:
                 return 0;
         case SSB_BUSTYPE_PCI:
-        case SSB_BUSTYPE_PCMCIA:
                 return SSB_PCI_DMA;
         }
         return 0;
diff --git a/drivers/ssb/pcmcia.c b/drivers/ssb/pcmcia.c
index cd49f7c65531..d674cef7210d 100644
--- a/drivers/ssb/pcmcia.c
+++ b/drivers/ssb/pcmcia.c
@@ -28,11 +28,6 @@
 
 
 /* PCMCIA configuration registers */
-#define SSB_PCMCIA_CORECTL              0x00
-#define  SSB_PCMCIA_CORECTL_RESET       0x80 /* Core reset */
-#define  SSB_PCMCIA_CORECTL_IRQEN       0x04 /* IRQ enable */
-#define  SSB_PCMCIA_CORECTL_FUNCEN      0x01 /* Function enable */
-#define SSB_PCMCIA_CORECTL2             0x80
 #define SSB_PCMCIA_ADDRESS0             0x2E
 #define SSB_PCMCIA_ADDRESS1             0x30
 #define SSB_PCMCIA_ADDRESS2             0x32
@@ -671,6 +666,24 @@ static DEVICE_ATTR(ssb_sprom, 0600,
                    ssb_pcmcia_attr_sprom_show,
                    ssb_pcmcia_attr_sprom_store);
 
+static int ssb_pcmcia_cor_setup(struct ssb_bus *bus, u8 cor)
+{
+        u8 val;
+        int err;
+
+        err = ssb_pcmcia_cfg_read(bus, cor, &val);
+        if (err)
+                return err;
+        val &= ~COR_SOFT_RESET;
+        val |= COR_FUNC_ENA | COR_IREQ_ENA | COR_LEVEL_REQ;
+        err = ssb_pcmcia_cfg_write(bus, cor, val);
+        if (err)
+                return err;
+        msleep(40);
+
+        return 0;
+}
+
 void ssb_pcmcia_exit(struct ssb_bus *bus)
 {
         if (bus->bustype != SSB_BUSTYPE_PCMCIA)
@@ -681,7 +694,6 @@ void ssb_pcmcia_exit(struct ssb_bus *bus)
 
 int ssb_pcmcia_init(struct ssb_bus *bus)
 {
-        u8 val, offset;
         int err;
 
         if (bus->bustype != SSB_BUSTYPE_PCMCIA)
@@ -691,16 +703,12 @@ int ssb_pcmcia_init(struct ssb_bus *bus)
          * bus->mapped_pcmcia_seg with hardware state. */
         ssb_pcmcia_switch_segment(bus, 0);
 
-        /* Init IRQ routing */
-        if (bus->chip_id == 0x4306)
-                offset = SSB_PCMCIA_CORECTL;
-        else
-                offset = SSB_PCMCIA_CORECTL2;
-        err = ssb_pcmcia_cfg_read(bus, offset, &val);
+        /* Init the COR register. */
+        err = ssb_pcmcia_cor_setup(bus, CISREG_COR);
         if (err)
                 goto error;
-        val |= SSB_PCMCIA_CORECTL_IRQEN | SSB_PCMCIA_CORECTL_FUNCEN;
-        err = ssb_pcmcia_cfg_write(bus, offset, val);
+        /* Some cards also need this register to get poked. */
+        err = ssb_pcmcia_cor_setup(bus, CISREG_COR + 0x80);
         if (err)
                 goto error;