mips: octeon: Add minimal Octeon 3 EBB7304 EVK support

This patch adds very basic minimal support for the Marvell Octeon 3
CN73xx based EBB7304 EVK. Please note that the basic Octeon port does
not support DDR3/4 initialization yet. To still use U-Boot on with this
port, the L2 cache (4MiB) is used as RAM. This way, U-Boot can boot
to the prompt on this board.

Supported devices:
- UART
- reset
- CFI parallel NOR flash

Signed-off-by: Stefan Roese <sr@denx.de>

3 files changed, 111 insertions, 0 deletions

diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
index f711e9fb59c..dc85901dcaa 100644
--- a/arch/mips/dts/Makefile
+++ b/arch/mips/dts/Makefile
@@ -18,6 +18,7 @@ dtb-$(CONFIG_BOARD_COMTREND_VR3032U) += comtrend,vr-3032u.dtb
 dtb-$(CONFIG_BOARD_COMTREND_WAP5813N) += comtrend,wap-5813n.dtb
 dtb-$(CONFIG_BOARD_HUAWEI_HG556A) += huawei,hg556a.dtb
 dtb-$(CONFIG_BOARD_MT7628_RFB) += mediatek,mt7628-rfb.dtb
+dtb-$(CONFIG_TARGET_OCTEON_EBB7304) += mrvl,octeon-ebb7304.dtb
 dtb-$(CONFIG_BOARD_NETGEAR_CG3100D) += netgear,cg3100d.dtb
 dtb-$(CONFIG_BOARD_NETGEAR_DGND3700V2) += netgear,dgnd3700v2.dtb
 dtb-$(CONFIG_BOARD_SAGEM_FAST1704) += sagem,f@st1704.dtb
diff --git a/arch/mips/dts/mrvl,octeon-ebb7304.dts b/arch/mips/dts/mrvl,octeon-ebb7304.dts
new file mode 100644
index 00000000000..4e9c2de7d40
--- /dev/null
+++ b/arch/mips/dts/mrvl,octeon-ebb7304.dts
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Marvell / Cavium Inc. EVB CN7300
+ */
+
+/dts-v1/;
+
+/include/ "mrvl,cn73xx.dtsi"
+
+/ {
+	model = "cavium,ebb7304";
+	compatible = "cavium,ebb7304";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = &uart0;
+	};
+};
+
+&bootbus {
+	/*
+	 * bootbus CS0 for CFI flash is remapped (0x1fc0.0000 -> 1f40.0000)
+	 * as the initial size is too small for the 8MiB flash device
+	 */
+	ranges = <0 0  0       0x1f400000  0xc00000>,
+		 <1 0  0x10000 0x10000000  0>,
+		 <2 0  0x10000 0x20000000  0>,
+		 <3 0  0x10000 0x30000000  0>,
+		 <4 0  0       0x1d020000  0x10000>,
+		 <5 0  0x10000 0x50000000  0>,
+		 <6 0  0x10000 0x60000000  0>,
+		 <7 0  0x10000 0x70000000  0>;
+
+	cavium,cs-config@0 {
+		compatible = "cavium,octeon-3860-bootbus-config";
+		cavium,cs-index = <0>;
+		cavium,t-adr  = <10>;
+		cavium,t-ce   = <50>;
+		cavium,t-oe   = <50>;
+		cavium,t-we   = <35>;
+		cavium,t-rd-hld = <25>;
+		cavium,t-wr-hld = <35>;
+		cavium,t-pause  = <0>;
+		cavium,t-wait   = <50>;
+		cavium,t-page   = <30>;
+		cavium,t-rd-dly = <0>;
+		cavium,page-mode = <1>;
+		cavium,pages     = <8>;
+		cavium,bus-width = <8>;
+	};
+
+	cavium,cs-config@4 {
+		compatible = "cavium,octeon-3860-bootbus-config";
+		cavium,cs-index = <4>;
+		cavium,t-adr  = <10>;
+		cavium,t-ce   = <10>;
+		cavium,t-oe   = <160>;
+		cavium,t-we   = <100>;
+		cavium,t-rd-hld = <10>;
+		cavium,t-wr-hld = <0>;
+		cavium,t-pause  = <50>;
+		cavium,t-wait   = <50>;
+		cavium,t-page   = <10>;
+		cavium,t-rd-dly = <10>;
+		cavium,pages     = <0>;
+		cavium,bus-width = <8>;
+	};
+
+	flash0: nor@0,0 {
+		compatible = "cfi-flash";
+		reg = <0 0 0x800000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		partition@0 {
+			label = "bootloader";
+			reg = <0 0x340000>;
+			read-only;
+		};
+		partition@300000 {
+			label = "storage";
+			reg = <0x340000 0x4be000>;
+		};
+		partition@7fe000 {
+			label = "environment";
+			reg = <0x7fe000 0x2000>;
+			read-only;
+		};
+	};
+};
+
+&uart0 {
+	clock-frequency = <1200000000>;
+};
diff --git a/arch/mips/mach-octeon/Kconfig b/arch/mips/mach-octeon/Kconfig
index 3c8ca8dd367..e8596ed99aa 100644
--- a/arch/mips/mach-octeon/Kconfig
+++ b/arch/mips/mach-octeon/Kconfig
@@ -31,6 +31,18 @@ config SOC_OCTEON3
 
 endchoice
 
+choice
+	prompt "Octeon 3 board select"
+	default TARGET_OCTEON_EBB7304
+
+config TARGET_OCTEON_EBB7304
+	bool "Marvell Octeon EBB7304"
+	select OCTEON_CN73XX
+	help
+	 Choose this for the Octeon EBB7304 board
+
+endchoice
+
 config SYS_DCACHE_SIZE
 	default 32768
 
@@ -43,4 +55,6 @@ config SYS_ICACHE_SIZE
 config SYS_ICACHE_LINE_SIZE
 	default 128
 
+source "board/Marvell/octeon_ebb7304/Kconfig"
+
 endmenu