From: Rouven Czerwinski <[email protected]>

Working:
- RKBIN DDR training (rk3566_ddr_1056MHz_v1.13.bin)
- RKBIN TF-A (v1.34) from RKBIN
- Environment storage
- DHCP, ping and link detection

Signed-off-by: Rouven Czerwinski <[email protected]>
---
 arch/arm/boards/Makefile             |  1 +
 arch/arm/boards/radxa-cm3/.gitignore |  1 +
 arch/arm/boards/radxa-cm3/Makefile   |  3 ++
 arch/arm/boards/radxa-cm3/board.c    | 56 ++++++++++++++++++++++++++++
 arch/arm/boards/radxa-cm3/lowlevel.c | 50 +++++++++++++++++++++++++
 arch/arm/dts/Makefile                |  1 +
 arch/arm/dts/rk3566-cm3-io.dts       | 55 +++++++++++++++++++++++++++
 arch/arm/mach-rockchip/Kconfig       |  6 +++
 images/Makefile.rockchip             |  7 ++++
 9 files changed, 180 insertions(+)
 create mode 100644 arch/arm/boards/radxa-cm3/.gitignore
 create mode 100644 arch/arm/boards/radxa-cm3/Makefile
 create mode 100644 arch/arm/boards/radxa-cm3/board.c
 create mode 100644 arch/arm/boards/radxa-cm3/lowlevel.c
 create mode 100644 arch/arm/dts/rk3566-cm3-io.dts

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 37b1650e63..b204c257f6 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -190,3 +190,4 @@ obj-$(CONFIG_MACH_RK3568_BPI_R2PRO)                 += 
rockchip-rk3568-bpi-r2pro/
 obj-$(CONFIG_MACH_PINE64_QUARTZ64)             += pine64-quartz64/
 obj-$(CONFIG_MACH_RADXA_ROCK3)                 += radxa-rock3/
 obj-$(CONFIG_MACH_VARISCITE_DT8MCUSTOMBOARD_IMX8MP)    += 
variscite-dt8mcustomboard-imx8mp/
+obj-$(CONFIG_MACH_RADXA_CM3)                   += radxa-cm3/
diff --git a/arch/arm/boards/radxa-cm3/.gitignore 
b/arch/arm/boards/radxa-cm3/.gitignore
new file mode 100644
index 0000000000..f458f794b5
--- /dev/null
+++ b/arch/arm/boards/radxa-cm3/.gitignore
@@ -0,0 +1 @@
+sdram-init.bin
diff --git a/arch/arm/boards/radxa-cm3/Makefile 
b/arch/arm/boards/radxa-cm3/Makefile
new file mode 100644
index 0000000000..b37b6c870b
--- /dev/null
+++ b/arch/arm/boards/radxa-cm3/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y += board.o
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/radxa-cm3/board.c 
b/arch/arm/boards/radxa-cm3/board.c
new file mode 100644
index 0000000000..14b6784179
--- /dev/null
+++ b/arch/arm/boards/radxa-cm3/board.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <bootsource.h>
+#include <common.h>
+#include <deep-probe.h>
+#include <init.h>
+#include <mach/rockchip/bbu.h>
+
+struct cm3_model {
+       const char *name;
+       const char *shortname;
+};
+
+static int cm3_probe(struct device *dev)
+{
+       enum bootsource bootsource = bootsource_get();
+       int instance = bootsource_get_instance();
+       const struct cm3_model *model;
+
+       model = device_get_match_data(dev);
+
+       barebox_set_model(model->name);
+       barebox_set_hostname(model->shortname);
+
+       if (bootsource == BOOTSOURCE_MMC && instance == 1)
+               of_device_enable_path("/chosen/environment-sd");
+       else
+               of_device_enable_path("/chosen/environment-emmc");
+
+       rk3568_bbu_mmc_register("emmc", BBU_HANDLER_FLAG_DEFAULT,
+                               "/dev/mmc0");
+       rk3568_bbu_mmc_register("sd", 0, "/dev/mmc1");
+
+       return 0;
+}
+
+static const struct cm3_model cm3_io = {
+       .name = "Radxa CM3 on IO Board",
+       .shortname = "cm3-io",
+};
+
+static const struct of_device_id cm3_of_match[] = {
+       {
+               .compatible = "radxa,cm3-io",
+               .data = &cm3_io,
+       },
+       { /* sentinel */ },
+};
+
+static struct driver cm3_io_board_driver = {
+       .name = "board-cm3-io",
+       .probe = cm3_probe,
+       .of_compatible = cm3_of_match,
+};
+coredevice_platform_driver(cm3_io_board_driver);
+
+BAREBOX_DEEP_PROBE_ENABLE(cm3_of_match);
diff --git a/arch/arm/boards/radxa-cm3/lowlevel.c 
b/arch/arm/boards/radxa-cm3/lowlevel.c
new file mode 100644
index 0000000000..e25ba62bea
--- /dev/null
+++ b/arch/arm/boards/radxa-cm3/lowlevel.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/rockchip/hardware.h>
+#include <mach/rockchip/atf.h>
+#include <debug_ll.h>
+#include <mach/rockchip/rockchip.h>
+
+extern char __dtb_rk3566_cm3_io_start[];
+
+static noinline void rk3566_start(void)
+{
+       void *fdt = __dtb_rk3566_cm3_io_start;
+
+       /*
+        * Enable vccio4 1.8V and vccio6 1.8V
+        * Needed for GMAC to work.
+        * FIXME: This is done by the io-domain driver as well, but there
+        * currently is no mechanism to make sure the driver gets probed
+        * before its consumers. Remove this setup once this issue is
+        * resolved.
+        */
+       writel(RK_SETBITS(0x50), 0xfdc20140);
+
+       if (current_el() == 3) {
+               rk3568_lowlevel_init();
+               rk3568_atf_load_bl31(fdt);
+               /* not reached */
+       }
+
+       barebox_arm_entry(RK3568_DRAM_BOTTOM, 0x80000000 - RK3568_DRAM_BOTTOM, 
fdt);
+}
+
+ENTRY_FUNCTION(start_radxa_cm3_io, r0, r1, r2)
+{
+       /*
+        * Image execution starts at 0x0, but this is used for ATF and
+        * OP-TEE later, so move away from here.
+        */
+       if (current_el() == 3)
+               relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);
+       else
+               relocate_to_current_adr();
+
+       setup_c();
+
+       rk3566_start();
+}
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0a7cceb461..220e1617e3 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -109,6 +109,7 @@ lwl-$(CONFIG_MACH_PROTONIC_STM32MP1) += \
        stm32mp151-prtt1s.dtb.o
 lwl-$(CONFIG_MACH_RADXA_ROCK) += rk3188-radxarock.dtb.o
 lwl-$(CONFIG_MACH_RADXA_ROCK3) += rk3568-rock-3a.dtb.o
+lwl-$(CONFIG_MACH_RADXA_CM3) += rk3566-cm3-io.dtb.o
 lwl-$(CONFIG_MACH_PHYTEC_SOM_RK3288) += rk3288-phycore-som.dtb.o
 lwl-$(CONFIG_MACH_REALQ7) += imx6q-dmo-edmqmx6.dtb.o
 lwl-$(CONFIG_MACH_RK3568_EVB) += rk3568-evb1-v10.dtb.o
diff --git a/arch/arm/dts/rk3566-cm3-io.dts b/arch/arm/dts/rk3566-cm3-io.dts
new file mode 100644
index 0000000000..81f896b943
--- /dev/null
+++ b/arch/arm/dts/rk3566-cm3-io.dts
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+
+#include <arm64/rockchip/rk3566-radxa-cm3-io.dts>
+#include "rk356x.dtsi"
+
+/ {
+       chosen: chosen {
+               environment-sd {
+                       compatible = "barebox,environment";
+                       device-path = &environment_sd;
+                       status = "disabled";
+               };
+
+               environment-emmc {
+                       compatible = "barebox,environment";
+                       device-path = &environment_emmc;
+                       status = "disabled";
+               };
+       };
+
+       memory@a00000 {
+               device_type = "memory";
+               reg = <0x0 0x00a00000 0x0 0x7f600000>;
+       };
+};
+
+&sdhci {
+       no-sd;
+
+       partitions {
+               compatible = "fixed-partitions";
+               #address-cells = <2>;
+               #size-cells = <2>;
+
+               environment_emmc: partition@408000 {
+                       label = "barebox-environment";
+                       reg = <0x0 0x408000 0x0 0x8000>;
+               };
+       };
+};
+
+&sdmmc0 {
+       partitions {
+               compatible = "fixed-partitions";
+               #address-cells = <2>;
+               #size-cells = <2>;
+
+               environment_sd: partition@408000 {
+                       label = "barebox-environment";
+                       reg = <0x0 0x408000 0x0 0x8000>;
+               };
+       };
+};
diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index 4ac75ab947..0d3bbebaad 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -86,6 +86,12 @@ config MACH_RADXA_ROCK3
        help
          Say Y here if you are using a Radxa ROCK3
 
+config MACH_RADXA_CM3
+       select ARCH_RK3568
+       bool "Radxa CM3"
+       help
+         Say Y here if you are using a Radxa CM3
+
 comment "select board features:"
 
 config ARCH_ROCKCHIP_ATF
diff --git a/images/Makefile.rockchip b/images/Makefile.rockchip
index 33c76caf79..490e1ddb4d 100644
--- a/images/Makefile.rockchip
+++ b/images/Makefile.rockchip
@@ -23,6 +23,9 @@ image-$(CONFIG_MACH_PINE64_QUARTZ64) += barebox-quartz64a.img
 pblb-$(CONFIG_MACH_RADXA_ROCK3) += start_rock3a
 image-$(CONFIG_MACH_RADXA_ROCK3) += barebox-rock3a.img
 
+pblb-$(CONFIG_MACH_RADXA_CM3) += start_radxa-cm3-io.img
+image-$(CONFIG_MACH_RADXA_CM3) += barebox-radxa-cm3-io.img
+
 quiet_cmd_rkimg_image = RK-IMG $@
       cmd_rkimg_image = $(objtree)/scripts/rkimage -o $@ $(word 2,$^) $(word 
1,$^)
 
@@ -41,3 +44,7 @@ $(obj)/barebox-quartz64a.img: $(obj)/start_quartz64a.pblb \
 $(obj)/barebox-rock3a.img: $(obj)/start_rock3a.pblb \
                 $(board)/radxa-rock3/sdram-init.bin
        $(call if_changed,rkimg_image)
+
+$(obj)/barebox-radxa-cm3-io.img: $(obj)/start_radxa_cm3_io.pblb \
+                $(board)/radxa-cm3/sdram-init.bin
+       $(call if_changed,rkimg_image)
-- 
2.39.2


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