bmips: add experimental PCI/PCIe support

These PCI drivers are a bit hacky and definitely not suitable for upstreaming,
but hopefully we can use them as a base for developing proper upstream PCI
drivers.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

11 files changed, 223 insertions, 0 deletions

diff --git a/target/linux/bmips/dts/bcm6318-comtrend-ar-5315u.dts b/target/linux/bmips/dts/bcm6318-comtrend-ar-5315u.dts
index a5ae435a3a..5b44b05e70 100644
--- a/target/linux/bmips/dts/bcm6318-comtrend-ar-5315u.dts
+++ b/target/linux/bmips/dts/bcm6318-comtrend-ar-5315u.dts
@@ -164,6 +164,10 @@
 	status = "okay";
 };
 
+&pcie {
+	status = "okay";
+};
+
 &pinctrl {
 	pinctrl_leds: leds {
 		function = "led";
diff --git a/target/linux/bmips/dts/bcm6318.dtsi b/target/linux/bmips/dts/bcm6318.dtsi
index e7dc38e937..9067db952e 100644
--- a/target/linux/bmips/dts/bcm6318.dtsi
+++ b/target/linux/bmips/dts/bcm6318.dtsi
@@ -347,6 +347,41 @@
 			status = "disabled";
 		};
 
+		pcie: pcie@10010000 {
+			compatible = "brcm,bcm6318-pcie";
+			reg = <0x10010000 0x10000>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x10200000 0x10200000 0 0x100000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6318_IRQ_PCIE_RC>;
+
+			clocks = <&periph_clk BCM6318_CLK_PCIE>,
+				 <&periph_clk BCM6318_CLK_PCIE25>,
+				 <&ubus_clk BCM6318_UCLK_PCIE>;
+			clock-names = "pcie",
+				      "pcie25",
+				      "pcie-ubus";
+
+			resets = <&periph_rst BCM6318_RST_PCIE>,
+				 <&periph_rst BCM6318_RST_PCIE_EXT>,
+				 <&periph_rst BCM6318_RST_PCIE_CORE>,
+				 <&periph_rst BCM6318_RST_PCIE_HARD>;
+			reset-names = "pcie",
+				      "pcie-ext",
+				      "pcie-core",
+				      "pcie-hard";
+
+			power-domains = <&periph_pwr BCM6318_POWER_DOMAIN_PCIE>;
+
+			status = "disabled";
+		};
+
 		switch0: switch@10080000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
diff --git a/target/linux/bmips/dts/bcm63268.dtsi b/target/linux/bmips/dts/bcm63268.dtsi
index 284d2c8ef0..32cbbd7200 100644
--- a/target/linux/bmips/dts/bcm63268.dtsi
+++ b/target/linux/bmips/dts/bcm63268.dtsi
@@ -371,6 +371,12 @@
 			status = "disabled";
 		};
 
+		serdes_cntl: syscon@10001804 {
+			compatible = "syscon";
+			reg = <0x10001804 0x4>;
+			native-endian;
+		};
+
 		periph_pwr: power-controller@1000184c {
 			compatible = "brcm,bcm63268-power-controller";
 			reg = <0x1000184c 0x4>;
@@ -468,6 +474,39 @@
 			status = "disabled";
 		};
 
+		pcie: pcie@106e0000 {
+			compatible = "brcm,bcm6328-pcie";
+			reg = <0x106e0000 0x10000>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x11000000 0x11000000 0 0xf00000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM63268_IRQ_PCIE_RC>;
+
+			clocks = <&periph_clk BCM63268_CLK_PCIE>;
+			clock-names = "pcie";
+
+			resets = <&periph_rst BCM63268_RST_PCIE>,
+				 <&periph_rst BCM63268_RST_PCIE_EXT>,
+				 <&periph_rst BCM63268_RST_PCIE_CORE>,
+				 <&periph_rst BCM63268_RST_PCIE_HARD>;
+			reset-names = "pcie",
+				      "pcie-ext",
+				      "pcie-core",
+				      "pcie-hard";
+
+			power-domains = <&periph_pwr BCM63268_POWER_DOMAIN_PCIE>;
+
+			brcm,serdes = <&serdes_cntl>;
+
+			status = "disabled";
+		};
+
 		switch0: switch@10700000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
diff --git a/target/linux/bmips/dts/bcm6328-comtrend-ar-5387un.dts b/target/linux/bmips/dts/bcm6328-comtrend-ar-5387un.dts
index 9ebd6c5c4d..261162454f 100644
--- a/target/linux/bmips/dts/bcm6328-comtrend-ar-5387un.dts
+++ b/target/linux/bmips/dts/bcm6328-comtrend-ar-5387un.dts
@@ -111,6 +111,10 @@
 	status = "okay";
 };
 
+&pcie {
+	status = "okay";
+};
+
 &pinctrl {
 	pinctrl_leds: leds {
 		function = "led";
diff --git a/target/linux/bmips/dts/bcm6328.dtsi b/target/linux/bmips/dts/bcm6328.dtsi
index 64fd04142c..76d7a257d4 100644
--- a/target/linux/bmips/dts/bcm6328.dtsi
+++ b/target/linux/bmips/dts/bcm6328.dtsi
@@ -317,6 +317,12 @@
 			status = "disabled";
 		};
 
+		serdes_cntl: syscon@10001800 {
+			compatible = "syscon";
+			reg = <0x10001800 0x4>;
+			native-endian;
+		};
+
 		periph_pwr: power-controller@10001848 {
 			compatible = "brcm,bcm6328-power-controller";
 			reg = <0x10001848 0x4>;
@@ -462,5 +468,38 @@
 				reg = <1>;
 			};
 		};
+
+		pcie: pcie@10e40000 {
+			compatible = "brcm,bcm6328-pcie";
+			reg = <0x10e40000 0x10000>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x10f00000 0x10f00000 0 0x100000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6328_IRQ_PCIE_RC>;
+
+			clocks = <&periph_clk BCM6328_CLK_PCIE>;
+			clock-names = "pcie";
+
+			resets = <&periph_rst BCM6328_RST_PCIE>,
+				 <&periph_rst BCM6328_RST_PCIE_EXT>,
+				 <&periph_rst BCM6328_RST_PCIE_CORE>,
+				 <&periph_rst BCM6328_RST_PCIE_HARD>;
+			reset-names = "pcie",
+				      "pcie-ext",
+				      "pcie-core",
+				      "pcie-hard";
+
+			power-domains = <&periph_pwr BCM6328_POWER_DOMAIN_PCIE>;
+
+			brcm,serdes = <&serdes_cntl>;
+
+			status = "disabled";
+		};
 	};
 };
diff --git a/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts b/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
index ba776caf78..0f21ca4a6b 100644
--- a/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
+++ b/target/linux/bmips/dts/bcm6358-huawei-hg556a-b.dts
@@ -129,6 +129,10 @@
 	status = "okay";
 };
 
+&pci {
+	status = "okay";
+};
+
 &pflash {
 	status = "okay";
 
diff --git a/target/linux/bmips/dts/bcm6358.dtsi b/target/linux/bmips/dts/bcm6358.dtsi
index c06001c62d..fee9850059 100644
--- a/target/linux/bmips/dts/bcm6358.dtsi
+++ b/target/linux/bmips/dts/bcm6358.dtsi
@@ -280,6 +280,31 @@
 			status = "disabled";
 		};
 
+		pci: pci@fffe1000 {
+			compatible = "brcm,bcm6348-pci";
+			reg = <0xfffe1000 0x200>,
+			      <0x08000000 0x10000>;
+			reg-names = "pci",
+				    "pci-io";
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x30000000 0x30000000 0 0x8000000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6358_IRQ_MPI>;
+
+			resets = <&periph_rst BCM6358_RST_MPI>;
+			reset-names = "pci";
+
+			brcm,remap;
+
+			status = "disabled";
+		};
+
 		ehci: usb@fffe1300 {
 			compatible = "brcm,bcm6358-ehci", "generic-ehci";
 			reg = <0xfffe1300 0x100>;
diff --git a/target/linux/bmips/dts/bcm6362-netgear-dgnd3700-v2.dts b/target/linux/bmips/dts/bcm6362-netgear-dgnd3700-v2.dts
index 0d88169184..3ad37fed71 100644
--- a/target/linux/bmips/dts/bcm6362-netgear-dgnd3700-v2.dts
+++ b/target/linux/bmips/dts/bcm6362-netgear-dgnd3700-v2.dts
@@ -209,6 +209,10 @@
 	status = "okay";
 };
 
+&pcie {
+	status = "okay";
+};
+
 &pinctrl {
 	pinctrl_leds: leds {
 		function = "led";
diff --git a/target/linux/bmips/dts/bcm6362.dtsi b/target/linux/bmips/dts/bcm6362.dtsi
index 9a3d9c1f66..1ae1522287 100644
--- a/target/linux/bmips/dts/bcm6362.dtsi
+++ b/target/linux/bmips/dts/bcm6362.dtsi
@@ -406,6 +406,12 @@
 			status = "disabled";
 		};
 
+		serdes_cntl: syscon@10001804 {
+			compatible = "syscon";
+			reg = <0x10001804 0x4>;
+			native-endian;
+		};
+
 		periph_pwr: power-controller@10001848 {
 			compatible = "brcm,bcm6362-power-controller";
 			reg = <0x10001848 0x4>;
@@ -559,5 +565,36 @@
 				reg = <1>;
 			};
 		};
+
+		pcie: pcie@10e40000 {
+			compatible = "brcm,bcm6328-pcie";
+			reg = <0x10e40000 0x10000>;
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x10f00000 0x10f00000 0 0x100000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6362_IRQ_PCIE_RC>;
+
+			clocks = <&periph_clk BCM6362_CLK_PCIE>;
+			clock-names = "pcie";
+
+			resets = <&periph_rst BCM6362_RST_PCIE>,
+				 <&periph_rst BCM6362_RST_PCIE_EXT>,
+				 <&periph_rst BCM6362_RST_PCIE_CORE>;
+			reset-names = "pcie",
+				      "pcie-ext",
+				      "pcie-core";
+
+			power-domains = <&periph_pwr BCM6362_POWER_DOMAIN_PCIE>;
+
+			brcm,serdes = <&serdes_cntl>;
+
+			status = "disabled";
+		};
 	};
 };
diff --git a/target/linux/bmips/dts/bcm6368-comtrend-vr-3025u.dts b/target/linux/bmips/dts/bcm6368-comtrend-vr-3025u.dts
index b597a05f3a..c036b1cbec 100644
--- a/target/linux/bmips/dts/bcm6368-comtrend-vr-3025u.dts
+++ b/target/linux/bmips/dts/bcm6368-comtrend-vr-3025u.dts
@@ -69,6 +69,10 @@
 	status = "okay";
 };
 
+&pci {
+	status = "okay";
+};
+
 &pflash {
 	status = "okay";
 
diff --git a/target/linux/bmips/dts/bcm6368.dtsi b/target/linux/bmips/dts/bcm6368.dtsi
index 5b5064b29e..9f59182517 100644
--- a/target/linux/bmips/dts/bcm6368.dtsi
+++ b/target/linux/bmips/dts/bcm6368.dtsi
@@ -414,6 +414,34 @@
 			status = "disabled";
 		};
 
+		pci: pci@10001000 {
+			compatible = "brcm,bcm6348-pci";
+			reg = <0x10001000 0x200>,
+			      <0x08000000 0x10000>;
+			reg-names = "pci",
+				    "pci-io";
+			#address-cells = <3>;
+			#size-cells = <2>;
+
+			device_type = "pci";
+			bus-range = <0x00 0x01>;
+			ranges = <0x2000000 0 0x30000000 0x30000000 0 0x8000000>;
+			linux,pci-probe-only = <1>;
+
+			interrupt-parent = <&periph_intc>;
+			interrupts = <BCM6368_IRQ_MPI>;
+
+			resets = <&periph_rst BCM6368_RST_MPI>;
+			reset-names = "pci";
+
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_pci>;
+
+			brcm,remap;
+
+			status = "disabled";
+		};
+
 		ehci: usb@10001500 {
 			compatible = "brcm,bcm6368-ehci", "generic-ehci";
 			reg = <0x10001500 0x100>;