net: emac: emac gigabit ethernet controller driver

Add support for the Qualcomm Technologies, Inc. EMAC gigabit Ethernet
controller.

This driver supports the following features:
1) Checksum offload.
2) Interrupt coalescing support.
3) SGMII phy.
4) phylib interface for external phy

Based on original work by
	Niranjana Vishwanathapura <[email protected]>
	Gilad Avidov <[email protected]>

Signed-off-by: Timur Tabi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Timur Tabi

Documentation/devicetree/bindings/net/qcom-emac.txt

@@ -0,0 +1,111 @@
+Qualcomm Technologies EMAC Gigabit Ethernet Controller
+
+This network controller consists of two devices: a MAC and an SGMII
+internal PHY.  Each device is represented by a device tree node.  A phandle
+connects the MAC node to its corresponding internal phy node.  Another
+phandle points to the external PHY node.
+
+Required properties:
+
+MAC node:
+- compatible : Should be "qcom,fsm9900-emac".
+- reg : Offset and length of the register regions for the device
+- interrupts : Interrupt number used by this controller
+- mac-address : The 6-byte MAC address. If present, it is the default
+	MAC address.
+- internal-phy : phandle to the internal PHY node
+- phy-handle : phandle the the external PHY node
+
+Internal PHY node:
+- compatible : Should be "qcom,fsm9900-emac-sgmii" or "qcom,qdf2432-emac-sgmii".
+- reg : Offset and length of the register region(s) for the device
+- interrupts : Interrupt number used by this controller
+
+The external phy child node:
+- reg : The phy address
+
+Example:
+
+FSM9900:
+
+soc {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	emac0: ethernet@feb20000 {
+		compatible = "qcom,fsm9900-emac";
+		reg = <0xfeb20000 0x10000>,
+		      <0xfeb36000 0x1000>;
+		interrupts = <76>;
+
+		clocks = <&gcc 0>, <&gcc 1>, <&gcc 3>, <&gcc 4>, <&gcc 5>,
+			<&gcc 6>, <&gcc 7>;
+		clock-names = "axi_clk", "cfg_ahb_clk", "high_speed_clk",
+			"mdio_clk", "tx_clk", "rx_clk", "sys_clk";
+
+		internal-phy = <&emac_sgmii>;
+
+		phy-handle = <&phy0>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+		phy0: ethernet-phy@0 {
+			reg = <0>;
+		};
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&mdio_pins_a>;
+	};
+
+	emac_sgmii: ethernet@feb38000 {
+		compatible = "qcom,fsm9900-emac-sgmii";
+		reg = <0xfeb38000 0x1000>;
+		interrupts = <80>;
+	};
+
+	tlmm: pinctrl@fd510000 {
+		compatible = "qcom,fsm9900-pinctrl";
+
+		mdio_pins_a: mdio {
+			state {
+				pins = "gpio123", "gpio124";
+				function = "mdio";
+			};
+		};
+	};
+
+
+QDF2432:
+
+soc {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	emac0: ethernet@38800000 {
+		compatible = "qcom,fsm9900-emac";
+		reg = <0x0 0x38800000 0x0 0x10000>,
+		      <0x0 0x38816000 0x0 0x1000>;
+		interrupts = <0 256 4>;
+
+		clocks = <&gcc 0>, <&gcc 1>, <&gcc 3>, <&gcc 4>, <&gcc 5>,
+			 <&gcc 6>, <&gcc 7>;
+		clock-names = "axi_clk", "cfg_ahb_clk", "high_speed_clk",
+			"mdio_clk", "tx_clk", "rx_clk", "sys_clk";
+
+		internal-phy = <&emac_sgmii>;
+
+		phy-handle = <&phy0>;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+		phy0: ethernet-phy@4 {
+			reg = <4>;
+		};
+	};
+
+	emac_sgmii: ethernet@410400 {
+		compatible = "qcom,qdf2432-emac-sgmii";
+		reg = <0x0 0x00410400 0x0 0xc00>, /* Base address */
+		      <0x0 0x00410000 0x0 0x400>; /* Per-lane digital */
+		interrupts = <0 254 1>;
+	};

MAINTAINERS

@@ -9696,6 +9696,12 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
 S:	Supported
 F:	drivers/net/wireless/ath/ath10k/
 
+QUALCOMM EMAC GIGABIT ETHERNET DRIVER
+M:	Timur Tabi <[email protected]>
+L:	[email protected]
+S:	Supported
+F:	drivers/net/ethernet/qualcomm/emac/
+
 QUALCOMM HEXAGON ARCHITECTURE
 M:	Richard Kuo <[email protected]>
 L:	[email protected]

drivers/net/ethernet/qualcomm/Kconfig

@@ -24,4 +24,16 @@ config QCA7000
 	  To compile this driver as a module, choose M here. The module
 	  will be called qcaspi.
 
+config QCOM_EMAC
+	tristate "Qualcomm Technologies, Inc. EMAC Gigabit Ethernet support"
+	select CRC32
+	select PHYLIB
+	---help---
+	  This driver supports the Qualcomm Technologies, Inc. Gigabit
+	  Ethernet Media Access Controller (EMAC). The controller
+	  supports IEEE 802.3-2002, half-duplex mode at 10/100 Mb/s,
+	  full-duplex mode at 10/100/1000Mb/s, Wake On LAN (WOL) for
+	  low power, Receive-Side Scaling (RSS), and IEEE 1588-2008
+	  Precision Clock Synchronization Protocol.
+
 endif # NET_VENDOR_QUALCOMM

drivers/net/ethernet/qualcomm/Makefile

@@ -4,3 +4,5 @@
 
 obj-$(CONFIG_QCA7000) += qcaspi.o
 qcaspi-objs := qca_spi.o qca_framing.o qca_7k.o qca_debug.o
+
+obj-y += emac/

drivers/net/ethernet/qualcomm/emac/Makefile

@@ -0,0 +1,7 @@
+#
+# Makefile for the Qualcomm Technologies, Inc. EMAC Gigabit Ethernet driver
+#
+
+obj-$(CONFIG_QCOM_EMAC) += qcom-emac.o
+
+qcom-emac-objs := emac.o emac-mac.o emac-phy.o emac-sgmii.o