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>
diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index 17ffc1f..3d0a9ff 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -238,6 +238,7 @@
SSB_BUSTYPE_SSB, /* This SSB bus is the system bus */
SSB_BUSTYPE_PCI, /* SSB is connected to PCI bus */
SSB_BUSTYPE_PCMCIA, /* SSB is connected to PCMCIA bus */
+ SSB_BUSTYPE_SDIO, /* SSB is connected to SDIO bus */
};
/* board_vendor */
@@ -270,8 +271,12 @@
/* The core in the basic address register window. (PCI bus only) */
struct ssb_device *mapped_device;
- /* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */
- u8 mapped_pcmcia_seg;
+ union {
+ /* Currently mapped PCMCIA segment. (bustype == SSB_BUSTYPE_PCMCIA only) */
+ u8 mapped_pcmcia_seg;
+ /* Current SSB base address window for SDIO. */
+ u32 sdio_sbaddr;
+ };
/* Lock for core and segment switching.
* On PCMCIA-host busses this is used to protect the whole MMIO access. */
spinlock_t bar_lock;
@@ -282,6 +287,11 @@
struct pci_dev *host_pci;
/* Pointer to the PCMCIA device (only if bustype == SSB_BUSTYPE_PCMCIA). */
struct pcmcia_device *host_pcmcia;
+ /* Pointer to the SDIO device (only if bustype == SSB_BUSTYPE_SDIO). */
+ struct sdio_func *host_sdio;
+
+ /* See enum ssb_quirks */
+ unsigned int quirks;
#ifdef CONFIG_SSB_SPROM
/* Mutex to protect the SPROM writing. */
@@ -336,6 +346,11 @@
#endif /* DEBUG */
};
+enum ssb_quirks {
+ /* SDIO connected card requires performing a read after writing a 32-bit value */
+ SSB_QUIRK_SDIO_READ_AFTER_WRITE32 = (1 << 0),
+};
+
/* The initialization-invariants. */
struct ssb_init_invariants {
/* Versioning information about the PCB. */
@@ -366,6 +381,12 @@
struct pcmcia_device *pcmcia_dev,
unsigned long baseaddr);
#endif /* CONFIG_SSB_PCMCIAHOST */
+#ifdef CONFIG_SSB_SDIOHOST
+extern int ssb_bus_sdiobus_register(struct ssb_bus *bus,
+ struct sdio_func *sdio_func,
+ unsigned int quirks);
+#endif /* CONFIG_SSB_SDIOHOST */
+
extern void ssb_bus_unregister(struct ssb_bus *bus);