realtek: phy: add serdes driver

Until now we have a lot of things in the normal net/phy driver. The
SerDes stuff does not belong there. Looking around we can take a lot
of ideas from the ocelot/felix drivers and provide a nice implementation
for the realtek target. Add the driver and enable it in the readonly
mode for all 4 SoC types.

What can we do later with this:

1. Inject patch commands through the devicetree.
2. Lookup the SerDes thorugh the net/phy driver to control
   the SerDes at appropriate events (e.g. mac_config()).

The NIC adress range in the rlt839x.dtsi is inconsistent and overlaps
with the SerDes registers. Reorganize that to some meaningful range.
The NIC driver does not use that base at all.

Tested on:

RTL838x: Linksys LGS310C
RTL839x: Zyxel GS1920-24
RTL930x: Zyxel XGS1210-12
RTL931x: Linksys LGS352C

Signed-off-by: Markus Stockhausen <[email protected]>

target/linux/realtek/dts/rtl838x.dtsi

@@ -44,6 +44,15 @@
 		phy-mode = #m ; \
 	};
 
+#define SWITCH_PORT_SDS(n, s, m, sds1, sds2) \
+	port@##n { \
+		reg = <##n>; \
+		label = SWITCH_PORT_LABEL(s) ; \
+		phy-handle = <&phy##n>; \
+		phy-mode = #m ; \
+		phys = <&serdes0 sds1 sds2>; \
+	};
+
 #define SWITCH_SFP_PORT(n, s, m) \
 	port##n: port@##n { \
 		reg = <##n>; \
@@ -276,6 +285,15 @@
 		};
 	};
 
+	serdes0: serdes@1b00e780 {
+		compatible = "realtek,rtl8380-serdes", "realtek,otto-serdes";
+		reg = <0x1b00e780 0x1200>;
+		port-count = <6>;
+		page-count = <4>;
+		controlled-ports = <0x0000>;
+		#phy-cells = <2>;
+	};
+
 	sram0: sram@9f000000 {
 		compatible = "mmio-sram";
 		reg = <0x9f000000 0x10000>;

target/linux/realtek/dts/rtl839x.dtsi

@@ -44,6 +44,15 @@
 		phy-mode = #m ; \
 	};
 
+#define SWITCH_PORT_SDS(n, s, m, sds1, sds2) \
+	port@##n { \
+		reg = <##n>; \
+		label = SWITCH_PORT_LABEL(s) ; \
+		phy-handle = <&phy##n>; \
+		phy-mode = #m ; \
+		phys = <&serdes0 sds1 sds2>; \
+	};
+
 #define SWITCH_SFP_PORT(n, s, m) \
 	port@##n { \
 		reg = <##n>; \
@@ -292,9 +301,9 @@
 		};
 	};
 
-	ethernet0: ethernet@1b00a300 {
+	ethernet0: ethernet@1b00780c {
 		compatible = "realtek,rtl838x-eth";
-		reg = <0x1b00a300 0x100>;
+		reg = <0x1b00780c 0x74>;
 
 		interrupt-parent = <&intc>;
 		interrupts = <24 3>;
@@ -307,6 +316,15 @@
 		};
 	};
 
+	serdes0: serdes@1b00a000 {
+		compatible = "realtek,rtl8390-serdes", "realtek,otto-serdes";
+		reg = <0x1b00a000 0x1c00>;
+		port-count = <14>;
+		page-count = <12>;
+		controlled-ports = <0x0000>;
+		#phy-cells = <2>;
+	};
+
 	sram0: sram@9f000000 {
 		compatible = "mmio-sram";
 		reg = <0x9f000000 0x18000>;

target/linux/realtek/dts/rtl930x.dtsi

@@ -173,6 +173,16 @@
 		};
 	};
 
+        serdes0: serdes@1b0003b0 {
+                compatible = "realtek,rtl9300-serdes", "realtek,otto-serdes";
+                reg = <0x1b0003b0 0x8>;
+                port-count = <12>;
+                page-count = <64>;
+                controlled-ports = <0x0000>;
+                #phy-cells = <2>;
+        };
+
+
 	switch0: switch@1b000000 {
 		compatible = "realtek,rtl83xx-switch";
 		status = "okay";

target/linux/realtek/dts/rtl931x.dtsi

@@ -195,6 +195,15 @@
 		};
 	};
 
+	serdes0: serdes@1b005638 {
+		compatible = "realtek,rtl9310-serdes", "realtek,otto-serdes";
+		reg = <0x1b005638 0x8>;
+		port-count = <14>;
+		page-count = <192>;
+		controlled-ports = <0x0000>;
+		#phy-cells = <2>;
+	};
+
 	switch0: switch@1b000000 {
 		compatible = "realtek,rtl83xx-switch";
 		status = "okay";