[PATCH v2 03/13] ARM: sunxi: introduce mach-sunxi
Jules Maselbas
jmaselbas at zdiv.net
Wed May 24 16:43:18 PDT 2023
Add kbuild boilerplate and some early init functions and lowlevel
pinctrl functions that will be necessary for early debug uart.
Signed-off-by: Jules Maselbas <jmaselbas at zdiv.net>
---
rfc->v2:
- removed ARCH_TEXT_BASE
- add lowlevel pinmux
arch/arm/Kconfig | 14 ++++++
arch/arm/Makefile | 1 +
arch/arm/mach-sunxi/Kconfig | 3 ++
arch/arm/mach-sunxi/Makefile | 2 +
arch/arm/mach-sunxi/cpu_init.c | 57 ++++++++++++++++++++++
arch/arm/mach-sunxi/sunxi.c | 0
images/Makefile | 1 +
images/Makefile.sunxi | 13 +++++
include/mach/sunxi/init.h | 11 +++++
include/mach/sunxi/sun50i-regs.h | 43 +++++++++++++++++
include/mach/sunxi/sunxi-pinctrl.h | 76 ++++++++++++++++++++++++++++++
11 files changed, 221 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 5aef8fcd3b..3c6a3133a8 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -155,6 +155,19 @@ config ARCH_SOCFPGA
select COMMON_CLK
select CLKDEV_LOOKUP
+config ARCH_SUNXI
+ bool "Allwinner SoCs"
+ depends on 64BIT
+ select CLKDEV_LOOKUP
+ select COMMON_CLK
+ select COMMON_CLK_OF_PROVIDER
+ select GPIOLIB
+ select HAVE_PBL_MULTI_IMAGES
+ select OFDEVICE
+ select OFTREE
+ select PINCTRL
+ select RELOCATABLE
+
config ARCH_VERSATILE
bool "ARM Versatile boards (ARM926EJ-S)"
depends on 32BIT
@@ -325,6 +338,7 @@ 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..6094f40e2e
--- /dev/null
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -0,0 +1,3 @@
+if ARCH_SUNXI
+
+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..aa6add243e
--- /dev/null
+++ b/arch/arm/mach-sunxi/cpu_init.c
@@ -0,0 +1,57 @@
+/* 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)
+{
+ /* running from osc24 */
+ set_cntfrq(24 * 1000 * 1000);
+ /* 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);
+}
+
+void sun50i_cpu_lowlevel_init(void)
+{
+ arm_cpu_lowlevel_init();
+ sunxi_ccu_init(SUN50I_CCU_BASE_ADDR);
+}
+
+void sun50i_cpu_lowlevel_reset(void)
+{
+ void __iomem *reg = SUN50I_TIMER_BASE_ADDR;
+ /* Set the watchdog for its shortest interval (.5s) and wait */
+ writel(1, reg + 0xB4); /* reset whole system */
+ writel(1, reg + 0xB8); /* enable */
+ writel((0xa57 << 1) | 1, reg + 0xB0); /* restart */
+ __hang();
+}
+
+void sun50i_uart_setup(void)
+{
+ void __iomem *ccu = SUN50I_CCU_BASE_ADDR;
+ void __iomem *pio = SUN50I_PIO_BASE_ADDR;
+
+ /* PIO clock enable */
+ setbits_le32(ccu + CCU_BUS_CLK_GATE2, BIT(5));
+ /* UART0 clock enable */
+ setbits_le32(ccu + CCU_BUS_CLK_GATE3, BIT(16));
+ /* UART0 release reset */
+ setbits_le32(ccu + CCU_BUS_SOFT_RST4, BIT(16));
+
+ /* UART0 pinmux (PB8 + PB9) */
+ sunxi_pinmux_set_func(pio, PIO_PB_CFG0, GENMASK(9, 8), 4);
+
+ debug_ll_init();
+ putc_ll('>');
+}
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..fed9afe6ba
--- /dev/null
+++ b/include/mach/sunxi/init.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef MACH_SUNXI_INIT_H
+#define MACH_SUNXI_INIT_H
+
+void sun50i_cpu_lowlevel_init(void);
+
+void sun50i_cpu_lowlevel_reset(void);
+
+void sun50i_uart_setup(void);
+
+#endif
diff --git a/include/mach/sunxi/sun50i-regs.h b/include/mach/sunxi/sun50i-regs.h
new file mode 100644
index 0000000000..23934601b4
--- /dev/null
+++ b/include/mach/sunxi/sun50i-regs.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef MACH_SUNXI_SUN50I_REGS_H
+#define MACH_SUNXI_SUN50I_REGS_H
+
+#include <linux/sizes.h>
+
+#define SUN50I_A64_RVBAR_IOMAP 0x017000a0
+#define SUN50I_PBL_STACK_TOP (SUN50I_SRAM_A1_ADDR + SUN50I_SRAM_A1_SIZE)
+
+#define SUN50I_SRAM_A1_ADDR 0x00010000
+#define SUN50I_SRAM_A1_SIZE SZ_32K
+#define SUN50I_SRAM_A2_ADDR 0x00044000
+#define SUN50I_SRAM_A2_SIZE SZ_64K
+#define SUN50I_SRAM_C_ADDR 0x00018000
+/* advertised as 160K, but only ~108K can be used */
+#define SUN50I_SRAM_C_SIZE (108 * SZ_1K)
+
+#define SUN50I_DRAM_ADDR 0x40000000
+
+#define SUN50I_CCU_BASE_ADDR IOMEM(0x01c20000)
+#define SUN50I_PIO_BASE_ADDR IOMEM(0x01c20800)
+#define SUN50I_MMC0_BASE_ADDR IOMEM(0x01c0f000)
+#define SUN50I_MMC1_BASE_ADDR IOMEM(0x01c10000)
+#define SUN50I_MMC2_BASE_ADDR IOMEM(0x01c11000)
+#define SUN50I_TIMER_BASE_ADDR IOMEM(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..5e796197bd
--- /dev/null
+++ b/include/mach/sunxi/sunxi-pinctrl.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MACH_SUNXI_PINCTRL_H
+#define __MACH_SUNXI_PINCTRL_H
+
+/* low-level gpio "pio" defines to be used in PBL early init,
+ * pio aka "allwinner,sun8i-h3-pinctrl" */
+
+#define PIO_Pn_CFG0(n) ((n)+0x0)
+#define PIO_Pn_CFG1(n) ((n)+0x4)
+#define PIO_Pn_CFG2(n) ((n)+0x8)
+#define PIO_Pn_CFG3(n) ((n)+0xc)
+
+#define PIO_PB_BASE (0x24*1)
+#define PIO_PC_BASE (0x24*2)
+#define PIO_PD_BASE (0x24*3)
+#define PIO_PE_BASE (0x24*4)
+#define PIO_PF_BASE (0x24*5)
+#define PIO_PG_BASE (0x24*6)
+#define PIO_PH_BASE (0x24*7)
+
+/* PORT B */
+#define PIO_PB_CFG0 PIO_Pn_CFG0(PIO_PB_BASE)
+#define PIO_PB_CFG1 PIO_Pn_CFG1(PIO_PB_BASE)
+/* PORT C */
+#define PIO_PC_CFG0 PIO_Pn_CFG0(PIO_PC_BASE)
+#define PIO_PC_CFG1 PIO_Pn_CFG1(PIO_PC_BASE)
+#define PIO_PC_CFG2 PIO_Pn_CFG2(PIO_PC_BASE)
+/* PORT D */
+#define PIO_PD_CFG0 PIO_Pn_CFG0(PIO_PD_BASE)
+#define PIO_PD_CFG1 PIO_Pn_CFG1(PIO_PD_BASE)
+#define PIO_PD_CFG2 PIO_Pn_CFG2(PIO_PD_BASE)
+#define PIO_PD_CFG3 PIO_Pn_CFG3(PIO_PD_BASE)
+/* PORT E */
+#define PIO_PE_CFG0 PIO_Pn_CFG0(PIO_PE_BASE)
+#define PIO_PE_CFG1 PIO_Pn_CFG1(PIO_PE_BASE)
+#define PIO_PE_CFG2 PIO_Pn_CFG2(PIO_PE_BASE)
+/* PORT F */
+#define PIO_PF_CFG0 PIO_Pn_CFG0(PIO_PF_BASE)
+/* PORT G */
+#define PIO_PG_CFG0 PIO_Pn_CFG0(PIO_PG_BASE)
+#define PIO_PG_CFG1 PIO_Pn_CFG1(PIO_PG_BASE)
+/* PORT H */
+#define PIO_PH_CFG0 PIO_Pn_CFG0(PIO_PH_BASE)
+#define PIO_PH_CFG1 PIO_Pn_CFG1(PIO_PH_BASE)
+
+#define PIO_PA_PULL1 0x20
+#define PIO_PB_PULL0 0x40
+#define PIO_PD_DATA 0x7c
+
+/* static inline so this function can be optimized to a single "call" to clrsetbits */
+static inline void sunxi_pinmux_set_func_port(void __iomem *pio, u32 port, u32 pins, u8 func)
+{
+ u32 i, msk = 0, cfg = 0;
+
+ if (!(pins & 0xff))
+ return;
+
+ for (i = 0; i < 8; i++) {
+ if (pins & (1 << i)) {
+ cfg |= func << (i * 4);
+ msk |= 0xf << (i * 4);
+ }
+ }
+ clrsetbits_le32(pio + port, msk, cfg);
+}
+
+static inline void sunxi_pinmux_set_func(void __iomem *pio, u32 port, u32 pins, u8 func)
+{
+ sunxi_pinmux_set_func_port(pio, PIO_Pn_CFG0(port), pins, func);
+ sunxi_pinmux_set_func_port(pio, PIO_Pn_CFG1(port), pins >> 8, func);
+ sunxi_pinmux_set_func_port(pio, PIO_Pn_CFG2(port), pins >> 16, func);
+ sunxi_pinmux_set_func_port(pio, PIO_Pn_CFG3(port), pins >> 24, func);
+}
+
+#endif
--
2.40.1
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