ssb: Implement SDIO host bus support

Add support for communicating with a Sonics Silicon Backplane through a
SDIO interface, as found in the Nintendo Wii WLAN daughter card.

The Nintendo Wii WLAN card includes a custom Broadcom 4318 chip with
a SDIO host interface.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
index 63ee5cfbefbb..b74212d698c7 100644
--- a/drivers/ssb/scan.c
+++ b/drivers/ssb/scan.c
@@ -175,6 +175,9 @@ static u32 scan_read32(struct ssb_bus *bus, u8 current_coreidx,
                 } else
                         ssb_pcmcia_switch_segment(bus, 0);
                 break;
+        case SSB_BUSTYPE_SDIO:
+                offset += current_coreidx * SSB_CORE_SIZE;
+                return ssb_sdio_scan_read32(bus, offset);
         }
         return readl(bus->mmio + offset);
 }
@@ -188,6 +191,8 @@ static int scan_switchcore(struct ssb_bus *bus, u8 coreidx)
                 return ssb_pci_switch_coreidx(bus, coreidx);
         case SSB_BUSTYPE_PCMCIA:
                 return ssb_pcmcia_switch_coreidx(bus, coreidx);
+        case SSB_BUSTYPE_SDIO:
+                return ssb_sdio_scan_switch_coreidx(bus, coreidx);
         }
         return 0;
 }
@@ -206,6 +211,8 @@ void ssb_iounmap(struct ssb_bus *bus)
                 SSB_BUG_ON(1); /* Can't reach this code. */
 #endif
                 break;
+        case SSB_BUSTYPE_SDIO:
+                break;
         }
         bus->mmio = NULL;
         bus->mapped_device = NULL;
@@ -230,6 +237,10 @@ static void __iomem *ssb_ioremap(struct ssb_bus *bus,
                 SSB_BUG_ON(1); /* Can't reach this code. */
 #endif
                 break;
+        case SSB_BUSTYPE_SDIO:
+                /* Nothing to ioremap in the SDIO case, just fake it */
+                mmio = (void __iomem *)baseaddr;
+                break;
         }
 
         return mmio;