[RFC PATCH 02/11] sunxi: introduce mach-sunxi
Jules Maselbas
jmaselbas at zdiv.net
Wed May 10 16:37:02 PDT 2023
Add kbuild boilerplate and some early init functions
---
arch/arm/Kconfig | 12 ++++++++++
arch/arm/Makefile | 1 +
arch/arm/mach-sunxi/Kconfig | 16 +++++++++++++
arch/arm/mach-sunxi/Makefile | 2 ++
arch/arm/mach-sunxi/cpu_init.c | 33 +++++++++++++++++++++++++++
arch/arm/mach-sunxi/sunxi.c | 0
images/Makefile | 1 +
images/Makefile.sunxi | 13 +++++++++++
include/mach/sunxi/init.h | 6 +++++
include/mach/sunxi/sun50i-regs.h | 36 ++++++++++++++++++++++++++++++
include/mach/sunxi/sunxi-pinctrl.h | 13 +++++++++++
11 files changed, 133 insertions(+)
create mode 100644 arch/arm/mach-sunxi/Kconfig
create mode 100644 arch/arm/mach-sunxi/Makefile
create mode 100644 arch/arm/mach-sunxi/cpu_init.c
create mode 100644 arch/arm/mach-sunxi/sunxi.c
create mode 100644 images/Makefile.sunxi
create mode 100644 include/mach/sunxi/init.h
create mode 100644 include/mach/sunxi/sun50i-regs.h
create mode 100644 include/mach/sunxi/sunxi-pinctrl.h
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index abe649de49..8da03e2703 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -144,6 +144,17 @@ config ARCH_SOCFPGA
select COMMON_CLK
select CLKDEV_LOOKUP
+config ARCH_SUNXI
+ bool "Allwinner SoCs"
+ select OFTREE
+ select OFDEVICE
+ select COMMON_CLK
+ select COMMON_CLK_OF_PROVIDER
+ select CLKDEV_LOOKUP
+ select GENERIC_GPIO
+ select GPIOLIB
+ select PINCTRL
+
config ARCH_VERSATILE
bool "ARM Versatile boards (ARM926EJ-S)"
select GPIOLIB
@@ -311,6 +322,7 @@ source "arch/arm/mach-omap/Kconfig"
source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/mach-rockchip/Kconfig"
source "arch/arm/mach-socfpga/Kconfig"
+source "arch/arm/mach-sunxi/Kconfig"
source "arch/arm/mach-stm32mp/Kconfig"
source "arch/arm/mach-versatile/Kconfig"
source "arch/arm/mach-vexpress/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index a506f1e3a3..bb61392e4c 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -103,6 +103,7 @@ machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
machine-$(CONFIG_ARCH_SAMSUNG) += samsung
machine-$(CONFIG_ARCH_SOCFPGA) += socfpga
machine-$(CONFIG_ARCH_STM32MP) += stm32mp
+machine-$(CONFIG_ARCH_SUNXI) += sunxi
machine-$(CONFIG_ARCH_VERSATILE) += versatile
machine-$(CONFIG_ARCH_VEXPRESS) += vexpress
machine-$(CONFIG_ARCH_TEGRA) += tegra
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
new file mode 100644
index 0000000000..0e8d83fedd
--- /dev/null
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -0,0 +1,16 @@
+if ARCH_SUNXI
+
+config ARCH_TEXT_BASE
+ hex
+ default 0x0
+
+menuconfig SUNXI_MULTI_BOARDS
+ bool "Allwinner boards"
+ select HAVE_PBL_MULTI_IMAGES
+ select RELOCATABLE
+
+if SUNXI_MULTI_BOARDS
+
+endif
+
+endif
diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
new file mode 100644
index 0000000000..d678973ca2
--- /dev/null
+++ b/arch/arm/mach-sunxi/Makefile
@@ -0,0 +1,2 @@
+obj-y += sunxi.o
+lwl-y += cpu_init.o
diff --git a/arch/arm/mach-sunxi/cpu_init.c b/arch/arm/mach-sunxi/cpu_init.c
new file mode 100644
index 0000000000..f4092d8d5d
--- /dev/null
+++ b/arch/arm/mach-sunxi/cpu_init.c
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <common.h>
+#include <linux/sizes.h>
+#include <asm/barebox-arm-head.h>
+// #include <asm/errata.h> TODO: errata 843419 ?
+#include <io.h>
+#include <debug_ll.h>
+#include <mach/sunxi/init.h>
+#include <mach/sunxi/sun50i-regs.h>
+#include <mach/sunxi/sunxi-pinctrl.h>
+
+static void sunxi_ccu_init(void __iomem *ccu)
+{
+ /* APB2 = 24MHz (UART, I2C) */
+ writel((1 << 24 /* src: 1=osc24 */) |
+ (0 << 16 /* pre_div (N): 0=/1 1=/2 2=/4 3=/8 */) |
+ (0 << 0) /* M-1 */,
+ ccu + CCU_APB2_CFG);
+ set_cntfrq(24 * 1000 * 1000);
+
+ /* PIO clock enable */
+ setbits_le32(ccu + CCU_BUS_CLK_GATE2, 1u << 5);
+ /* UART0 clock enable */
+ setbits_le32(ccu + CCU_BUS_CLK_GATE3, 1u << 16);
+ /* UART0 release reset */
+ setbits_le32(ccu + CCU_BUS_SOFT_RST4, 1u << 16);
+}
+
+static void sunxi_cpu_lowlevel_init(void)
+{
+ sunxi_ccu_init(IOMEM(SUNXI_CCU_BASE_ADDR));
+}
diff --git a/arch/arm/mach-sunxi/sunxi.c b/arch/arm/mach-sunxi/sunxi.c
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/images/Makefile b/images/Makefile
index aa5814710f..3a10fe1abb 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -151,6 +151,7 @@ include $(srctree)/images/Makefile.omap3
include $(srctree)/images/Makefile.rockchip
include $(srctree)/images/Makefile.socfpga
include $(srctree)/images/Makefile.stm32mp
+include $(srctree)/images/Makefile.sunxi
include $(srctree)/images/Makefile.tegra
include $(srctree)/images/Makefile.vexpress
include $(srctree)/images/Makefile.xburst
diff --git a/images/Makefile.sunxi b/images/Makefile.sunxi
new file mode 100644
index 0000000000..778d6f9bdf
--- /dev/null
+++ b/images/Makefile.sunxi
@@ -0,0 +1,13 @@
+#
+# barebox image generation Makefile for Allwinner sunxi eGON boot images
+#
+
+# %.egonimg - convert into eGON.BT0 image
+# ----------------------------------------------------------------------
+quiet_cmd_egon_image = EGON $@
+ cmd_egon_image = $(objtree)/scripts/egon_mkimage $< $@
+
+$(obj)/%.egonimg: $(obj)/% FORCE
+ $(call if_changed,egon_image)
+
+# ----------------------------------------------------------------------
diff --git a/include/mach/sunxi/init.h b/include/mach/sunxi/init.h
new file mode 100644
index 0000000000..26cc022fde
--- /dev/null
+++ b/include/mach/sunxi/init.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MACH_INIT_H
+#define __MACH_INIT_H
+
+#endif
diff --git a/include/mach/sunxi/sun50i-regs.h b/include/mach/sunxi/sun50i-regs.h
new file mode 100644
index 0000000000..68501fa351
--- /dev/null
+++ b/include/mach/sunxi/sun50i-regs.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MACH_SUN50I_REGS_H
+#define __MACH_SUN50I_REGS_H
+
+#define SUN50I_SRAM_A1_BASE_ADDR 0x00000000
+#define SUN50I_SRAM_A1_SIZE SZ_64K
+#define SUN50I_SRAM_A2_BASE_ADDR 0x00044000
+#define SUN50I_SRAM_A2_SIZE SZ_32K
+
+#define SUN50I_DRAM_BASE_ADDR 0x40000000
+
+#define SUN50I_CCU_BASE_ADDR 0x01c20000
+#define SUN50I_PIO_BASE_ADDR 0x01c20800
+#define SUN50I_MMC0_BASE_ADDR 0x01c0f000
+#define SUN50I_MMC1_BASE_ADDR 0x01c10000
+#define SUN50I_MMC2_BASE_ADDR 0x01c11000
+#define SUN50I_TIMER_BASE_ADDR 0x01c20c00
+
+#define CCU_PLL_CPUX 0x00
+#define CCU_PLL_PERIPH0 0x28
+#define CCU_CPUX_AXI_CFG 0x50
+#define CCU_AHB1_APB1_CFG 0x54
+#define CCU_APB2_CFG 0x58
+#define CCU_AHB2_CFG 0x5c
+#define CCU_BUS_CLK_GATE0 0x60
+#define CCU_BUS_CLK_GATE1 0x64
+#define CCU_BUS_CLK_GATE2 0x68
+#define CCU_BUS_CLK_GATE3 0x6c
+#define CCU_CE_CLK 0x9c
+#define CCU_MBUS_CLK 0x15c
+#define CCU_BUS_SOFT_RST0 0x2c0
+#define CCU_BUS_SOFT_RST4 0x2d8
+#define CCU_PLL_LOCK_CTRL 0x320
+
+#endif
diff --git a/include/mach/sunxi/sunxi-pinctrl.h b/include/mach/sunxi/sunxi-pinctrl.h
new file mode 100644
index 0000000000..adb2a24577
--- /dev/null
+++ b/include/mach/sunxi/sunxi-pinctrl.h
@@ -0,0 +1,13 @@
+/* pio aka "allwinner,sun8i-h3-pinctrl" */
+
+#define PIO_PA_CFG0 0x00
+#define PIO_PB_CFG0 0x24
+#define PIO_PB_CFG1 0x28
+#define PIO_PD_CFG0 0x6c
+#define PIO_PD_CFG1 0x70
+#define PIO_PD_CFG2 0x74
+#define PIO_PF_CFG0 0xb4
+
+#define PIO_PA_PULL1 0x20
+#define PIO_PB_PULL0 0x40
+#define PIO_PD_DATA 0x7c
--
2.40.0
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