[RFC PATCH 02/11] sunxi: introduce mach-sunxi
Jules Maselbas
jmaselbas at zdiv.net
Fri May 19 03:09:05 PDT 2023
On Thu, May 18, 2023 at 08:46:56PM +0200, Ahmad Fatoum wrote:
> On 11.05.23 01:37, Jules Maselbas wrote:
> > 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"
>
> depends on ARCH_MULTIARCH? :-)
I don't recall testing a multiarch build, yet
> That's the new hot stuff where you can build multiple SoC families
> in one go. Also, no HAS_DEBUG_LL?
low-level debug is added in a later patch. my initial though was that
HAS_DEBUG_LL is more board specific as it depends on the acctual UART
used for debugging, that's why it is added in ARCH_SUN50I_A64 Kconfig.
I can change this, add HAS_DEBUG_LL to ARCH_SUNXI instead.
> > + select OFTREE
> > + select OFDEVICE
> > + select COMMON_CLK
> > + select COMMON_CLK_OF_PROVIDER
> > + select CLKDEV_LOOKUP
> > + select GENERIC_GPIO
>
> This is implied by select GPIOLIB below.
ack
> > + 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
>
> Just make this the default?
by putting this into ARCH_SUNXI ?
> > +
> > +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);
>
> Nit: There's a BIT() macro that could be used here.
ack
> > + /* UART0 clock enable */
> > + setbits_le32(ccu + CCU_BUS_CLK_GATE3, 1u << 16);
> > + /* UART0 release reset */
> > + setbits_le32(ccu + CCU_BUS_SOFT_RST4, 1u << 16);
>
> Can the pads UART0 uses be muxed otherwise? Is it ok to unconditionally
To be clear: nothing touches the pin-muxes here, only clock-gate and reset
for gpio and uart. UART0 isn't muxed by default, it can be either muxed to
PB8/PB9 or PF2/PF4. To enable UART0 on PB8/PB9 you will to write 0x-----33-
into PIO PB_CFG1(0x28) register. Which I didn't do here... I think that's
because the boot ROM has done it... or i am missing something.
> enable UART0 here? I'd expect this to be a separate sunxi_uart_setup(port)
> that can be used by board code after doing lowlevel_init.
okay
> > +}
> > +
> > +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
>
> #include <linux/sizes.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
>
> I know much existing code doesn't, but you could already use IOMEM
> here to avoid casts in consumer code.
ack
> > +
> > +#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" */
>
> No include guard?
... this file could be merged in "sun50i-regs.h", what do you think ?
> > +
> > +#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
>
> --
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>
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