rockchip: rk3588-rock-5b: Enable boot from SPI NOR flash

Add sfc and flash node to device tree and config options to enable
support for booting from SPI NOR flash on Radxa ROCK 5 Model B.

Similar to RK3568 the BootRom in RK3588 can read all data and look for
idbloader at 0x8000, same as on SD and eMMC.

Use the rksd format and modify the mkimage offset to generate a bootable
u-boot-rockchip-spi.bin that can be written to 0x0 of SPI NOR flash. The
FIT image is loaded from 0x60000.

  => sf probe
  SF: Detected mx25u12835f with page size 256 Bytes, erase size 4 KiB, total 16 MiB

  => load mmc 1:1 10000000 u-boot-rockchip-spi.bin
  1492992 bytes read in 129 ms (11 MiB/s)

  => sf update $fileaddr 0 $filesize
  device 0 offset 0x0, size 0x16c800
  1300480 bytes written, 192512 bytes skipped in 11.103s, speed 137694 B/s

The BROM_BOOTSOURCE_ID value read back when booting from SPI flash does
not match the expected value of 3 (SPINOR) used by other SoCs. Instead a
value of 6 is read back, add a new enum value to handle this new
bootsource id.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: Eugen Hristev <eugen.hristev@collabora.com>

4 files changed, 46 insertions, 0 deletions

diff --git a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
index db342e6..1cd8a57 100644
--- a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
+++ b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
@@ -11,6 +11,7 @@
 / {
 	aliases {
 		mmc1 = &sdmmc;
+		spi0 = &sfc;
 	};
 
 	chosen {
@@ -54,6 +55,10 @@
 	bootph-all;
 };
 
+&fspim2_pins {
+	bootph-all;
+};
+
 &pcie2x1l2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie2x1l2_pins &pcie_reset_h>;
@@ -123,6 +128,25 @@
 	pinctrl-0 = <&emmc_bus8 &emmc_clk &emmc_cmd &emmc_data_strobe &emmc_rstnout>;
 };
 
+&sfc {
+	bootph-pre-ram;
+	u-boot,spl-sfc-no-dma;
+	pinctrl-names = "default";
+	pinctrl-0 = <&fspim2_pins>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	flash@0 {
+		bootph-pre-ram;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <24000000>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <1>;
+	};
+};
+
 &uart2m0_xfer {
 	bootph-all;
 };
diff --git a/arch/arm/dts/rk3588s-u-boot.dtsi b/arch/arm/dts/rk3588s-u-boot.dtsi
index 4fdf97c..c703e41 100644
--- a/arch/arm/dts/rk3588s-u-boot.dtsi
+++ b/arch/arm/dts/rk3588s-u-boot.dtsi
@@ -165,6 +165,15 @@
 		};
 	};
 
+	sfc: spi@fe2b0000 {
+		compatible = "rockchip,sfc";
+		reg = <0x0 0xfe2b0000 0x0 0x4000>;
+		interrupts = <GIC_SPI 206 IRQ_TYPE_LEVEL_HIGH 0>;
+		clocks = <&cru SCLK_SFC>, <&cru HCLK_SFC>;
+		clock-names = "clk_sfc", "hclk_sfc";
+		status = "disabled";
+	};
+
 	otp: nvmem@fecc0000 {
 		compatible = "rockchip,rk3588-otp";
 		reg = <0x0 0xfecc0000 0x0 0x400>;
@@ -242,3 +251,14 @@
 &ioc {
 	bootph-pre-ram;
 };
+
+#ifdef CONFIG_ROCKCHIP_SPI_IMAGE
+&binman {
+	simple-bin-spi {
+		mkimage {
+			args = "-n", CONFIG_SYS_SOC, "-T", "rksd";
+			offset = <0x8000>;
+		};
+	};
+};
+#endif
diff --git a/arch/arm/include/asm/arch-rockchip/bootrom.h b/arch/arm/include/asm/arch-rockchip/bootrom.h
index 4276a0f..7dab18f 100644
--- a/arch/arm/include/asm/arch-rockchip/bootrom.h
+++ b/arch/arm/include/asm/arch-rockchip/bootrom.h
@@ -48,6 +48,7 @@ enum {
 	BROM_BOOTSOURCE_SPINOR = 3,
 	BROM_BOOTSOURCE_SPINAND = 4,
 	BROM_BOOTSOURCE_SD = 5,
+	BROM_BOOTSOURCE_SPINOR_RK3588 = 6,
 	BROM_BOOTSOURCE_USB = 10,
 	BROM_LAST_BOOTSOURCE = BROM_BOOTSOURCE_USB
 };
diff --git a/arch/arm/mach-rockchip/rk3588/rk3588.c b/arch/arm/mach-rockchip/rk3588/rk3588.c
index 18e67b5..b1f535f 100644
--- a/arch/arm/mach-rockchip/rk3588/rk3588.c
+++ b/arch/arm/mach-rockchip/rk3588/rk3588.c
@@ -41,6 +41,7 @@ const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
 	[BROM_BOOTSOURCE_EMMC] = "/mmc@fe2e0000",
 	[BROM_BOOTSOURCE_SPINOR] = "/spi@fe2b0000/flash@0",
 	[BROM_BOOTSOURCE_SD] = "/mmc@fe2c0000",
+	[BROM_BOOTSOURCE_SPINOR_RK3588] = "/spi@fe2b0000/flash@0",
 };
 
 static struct mm_region rk3588_mem_map[] = {