net:sunxi-gmac: add gmac support

The commit itself comes from

https://github.com/cubieboard/linux-sunxi/tree/cubie/sunxi-3.4/

IRC user jemk found out the IP itself comes from DesignWare. It turns
out it is supported already in both the mainline (stmmac) and the
U-Boot (designware). These existing drivers should be made to work
with Allwinner chips. This driver is solely for the purpose of the
reference and will not be improved.

Signed-off-by: arokux <arokux@gmail.com>

arch/arm/plat-sunxi/include/plat/irqs.h

@@ -188,9 +188,9 @@
 #define SW_INT_IRQNO_SYNC_TIMER1	(83 + SW_INT_START)
 
 /* sun7i only */
+#define SW_INT_IRQNO_GMAC		(85 + SW_INT_START)
 #define SW_INT_IRQNO_TWI3		(88 + SW_INT_START)
 #define SW_INT_IRQNO_TWI4		(89 + SW_INT_START)
-#define SW_INT_IRQNO_GMAC		(85 + SW_INT_START)
 #ifdef CONFIG_ARCH_SUN7I
 #define SW_INT_END				  (127 + SW_INT_START)
 #else

drivers/net/ethernet/Kconfig

@@ -184,6 +184,7 @@ config SUNXI_EMAC
           To compile this driver as a module, choose M here.  The module
           will be called sunxi_emac.
 
+source "drivers/net/ethernet/allwinner/gmac/Kconfig"
 source "drivers/net/ethernet/tehuti/Kconfig"
 source "drivers/net/ethernet/ti/Kconfig"
 source "drivers/net/ethernet/tile/Kconfig"

drivers/net/ethernet/Makefile

@@ -68,6 +68,7 @@ obj-$(CONFIG_NET_VENDOR_SMSC) += smsc/
 obj-$(CONFIG_NET_VENDOR_STMICRO) += stmicro/
 obj-$(CONFIG_NET_VENDOR_SUN) += sun/
 obj-$(CONFIG_SUNXI_EMAC) += allwinner/
+obj-$(CONFIG_SUNXI_GMAC) += allwinner/gmac/
 obj-$(CONFIG_NET_VENDOR_TEHUTI) += tehuti/
 obj-$(CONFIG_NET_VENDOR_TI) += ti/
 obj-$(CONFIG_TILE_NET) += tile/

drivers/net/ethernet/allwinner/gmac/Kconfig

@@ -0,0 +1,47 @@
+config SUNXI_GMAC
+	tristate "Sunxi platform 10/100/1000Mbps Ethernet driver"
+	depends on HAS_IOMEM
+	select NET_CORE
+	select MII
+	select PHYLIB
+	select CRC32
+	---help---
+	  This is the driver for the Sunxi Ethernet.
+
+if SUNXI_GMAC
+
+config GMAC_SCRIPT_SYS
+	bool "Use sunxi platform script"
+	depends on SUNXI_GMAC
+	default y
+	---help---
+	 The GMAC gpio request and control by the script of sunxi platform.
+	 Select it, by script. If not, ioremap by drivers itself.
+
+config GMAC_CLK_SYS
+	bool "Clock use system interface"
+	depends on SUNXI_GMAC
+	default y
+	---help---
+	 It select the clock controler is system or the driver itself.
+	 If you want to use the system interface, select it. If not, the
+	 driver will control the clock by ioremap.
+
+choice
+	prompt "Select the DMA TX/RX descriptor operating modes"
+	depends on SUNXI_GMAC
+	---help---
+	  This driver supports DMA descriptor to operate both in dual buffer
+	  (RING) and linked-list(CHAINED) mode. In RING mode each descriptor
+	  points to two data buffer pointers whereas in CHAINED mode they
+	  points to only one data buffer pointer.
+
+config GMAC_RING
+	bool "Enable Descriptor Ring Mode"
+
+config GMAC_CHAINED
+	bool "Enable Descriptor Chained Mode"
+
+endchoice
+
+endif

drivers/net/ethernet/allwinner/gmac/Makefile

@@ -0,0 +1,6 @@
+obj-$(CONFIG_SUNXI_GMAC) += sunxi_gmac.o
+gmac-$(CONFIG_GMAC_TEST) += gmac_test.o
+
+sunxi_gmac-y := gmac_core.o gmac_mdio.o \
+			gmac_plat.o gmac_base.o \
+			gmac_desc.o gmac_ethtool.o