libertas: if_spi, driver for libertas GSPI devices

Add initial support for libertas devices using a GSPI interface.  This has
been tested with the 8686.

GSPI is intended to be used on embedded systems. Board-specific parameters are
required (see libertas_spi.h).

Thanks to everyone who took a look at the earlier versions of the patch.

Signed-off-by: Colin McCabe <colin@cozybit.com>
Signed-off-by: Andrey Yurovsky <andrey@cozybit.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/Kconfig

@@ -151,6 +151,12 @@ config LIBERTAS_SDIO
 	---help---
 	  A driver for Marvell Libertas 8385 and 8686 SDIO devices.
 
+config LIBERTAS_SPI
+	tristate "Marvell Libertas 8686 SPI 802.11b/g cards"
+	depends on LIBERTAS && SPI && GENERIC_GPIO
+	---help---
+	  A driver for Marvell Libertas 8686 SPI devices.
+
 config LIBERTAS_DEBUG
 	bool "Enable full debugging output in the Libertas module."
 	depends on LIBERTAS

drivers/net/wireless/libertas/Makefile

@@ -4,8 +4,10 @@ libertas-objs := main.o wext.o rx.o tx.o cmd.o cmdresp.o scan.o 11d.o	\
 usb8xxx-objs += if_usb.o
 libertas_cs-objs += if_cs.o
 libertas_sdio-objs += if_sdio.o
+libertas_spi-objs += if_spi.o
 
 obj-$(CONFIG_LIBERTAS)     += libertas.o
 obj-$(CONFIG_LIBERTAS_USB) += usb8xxx.o
 obj-$(CONFIG_LIBERTAS_CS)  += libertas_cs.o
 obj-$(CONFIG_LIBERTAS_SDIO) += libertas_sdio.o
+obj-$(CONFIG_LIBERTAS_SPI) += libertas_spi.o

drivers/net/wireless/libertas/defs.h

@@ -41,6 +41,7 @@
 #define LBS_DEB_HEX	0x00200000
 #define LBS_DEB_SDIO	0x00400000
 #define LBS_DEB_SYSFS	0x00800000
+#define LBS_DEB_SPI	0x01000000
 
 extern unsigned int lbs_debug;
 
@@ -84,6 +85,7 @@ do { if ((lbs_debug & (grp)) == (grp)) \
 #define lbs_deb_thread(fmt, args...)    LBS_DEB_LL(LBS_DEB_THREAD, " thread", fmt, ##args)
 #define lbs_deb_sdio(fmt, args...)      LBS_DEB_LL(LBS_DEB_SDIO, " sdio", fmt, ##args)
 #define lbs_deb_sysfs(fmt, args...)     LBS_DEB_LL(LBS_DEB_SYSFS, " sysfs", fmt, ##args)
+#define lbs_deb_spi(fmt, args...)       LBS_DEB_LL(LBS_DEB_SPI, " spi", fmt, ##args)
 
 #define lbs_pr_info(format, args...) \
 	printk(KERN_INFO DRV_NAME": " format, ## args)