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From: Jules Maselbas <jmaselbas@zdiv.net>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: Sascha Hauer <sha@pengutronix.de>, barebox@lists.infradead.org
Subject: Re: [PATCH v2 11/13] ARM: boards: sunxi: Add initial support for the pinephone
Date: Thu, 1 Jun 2023 08:19:25 +0200	[thread overview]
Message-ID: <ZHg4bZ0aozgjtUy0@tour> (raw)
In-Reply-To: <a24bf8d3-2d27-d18f-32df-11a6af2ab27c@pengutronix.de>

On Thu, Jun 01, 2023 at 08:00:47AM +0200, Ahmad Fatoum wrote:
> On 01.06.23 07:50, Jules Maselbas wrote:
> > Hi Sascha,
> > 
> > Thanks for your review
> > 
> > On Tue, May 30, 2023 at 10:42:36AM +0200, Sascha Hauer wrote:
> >> On Thu, May 25, 2023 at 01:43:26AM +0200, Jules Maselbas wrote:
> >>> Signed-off-by: Jules Maselbas <jmaselbas@zdiv.net>
> >>> ---
> >>>  arch/arm/boards/Makefile                    |   1 +
> >>>  arch/arm/boards/pine64-pinephone/Makefile   |   2 +
> >>>  arch/arm/boards/pine64-pinephone/board.c    |   0
> >>>  arch/arm/boards/pine64-pinephone/lowlevel.c | 104 ++++++++++++++++++++
> >>>  arch/arm/configs/pinephone_defconfig        |  12 +++
> >>>  arch/arm/dts/Makefile                       |   1 +
> >>>  arch/arm/dts/sun50i-a64-pinephone-1_2.dts   |   3 +
> >>>  arch/arm/mach-sunxi/Kconfig                 |  17 ++++
> >>>  images/Makefile.sunxi                       |   9 ++
> >>>  include/mach/sunxi/init.h                   |   4 +
> >>>  10 files changed, 153 insertions(+)
> >>>  create mode 100644 arch/arm/boards/pine64-pinephone/Makefile
> >>>  create mode 100644 arch/arm/boards/pine64-pinephone/board.c
> >>>  create mode 100644 arch/arm/boards/pine64-pinephone/lowlevel.c
> >>>  create mode 100644 arch/arm/configs/pinephone_defconfig
> >>>  create mode 100644 arch/arm/dts/sun50i-a64-pinephone-1_2.dts
> >>>
> >>> diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
> >>> index b204c257f6..f4796f5374 100644
> >>> --- a/arch/arm/boards/Makefile
> >>> +++ b/arch/arm/boards/Makefile
> >>> @@ -96,6 +96,7 @@ obj-$(CONFIG_MACH_PHYTEC_SOM_IMX6)		+= phytec-som-imx6/
> >>>  obj-$(CONFIG_MACH_PHYTEC_PHYCORE_IMX7)		+= phytec-phycore-imx7/
> >>>  obj-$(CONFIG_MACH_PHYTEC_PHYCORE_STM32MP1)	+= phytec-phycore-stm32mp1/
> >>>  obj-$(CONFIG_MACH_PHYTEC_SOM_IMX8MQ)		+= phytec-som-imx8mq/
> >>> +obj-$(CONFIG_MACH_PINE64_PINEPHONE)		+= pine64-pinephone/
> >>>  obj-$(CONFIG_MACH_PLATHOME_OPENBLOCKS_AX3)	+= plathome-openblocks-ax3/
> >>>  obj-$(CONFIG_MACH_PLATHOME_OPENBLOCKS_A6)	+= plathome-openblocks-a6/
> >>>  obj-$(CONFIG_MACH_PM9261)			+= pm9261/
> >>> diff --git a/arch/arm/boards/pine64-pinephone/Makefile b/arch/arm/boards/pine64-pinephone/Makefile
> >>> new file mode 100644
> >>> index 0000000000..092c31d6b2
> >>> --- /dev/null
> >>> +++ b/arch/arm/boards/pine64-pinephone/Makefile
> >>> @@ -0,0 +1,2 @@
> >>> +lwl-y += lowlevel.o
> >>> +obj-y += board.o
> >>> diff --git a/arch/arm/boards/pine64-pinephone/board.c b/arch/arm/boards/pine64-pinephone/board.c
> >>> new file mode 100644
> >>> index 0000000000..e69de29bb2
> >>> diff --git a/arch/arm/boards/pine64-pinephone/lowlevel.c b/arch/arm/boards/pine64-pinephone/lowlevel.c
> >>> new file mode 100644
> >>> index 0000000000..262d194864
> >>> --- /dev/null
> >>> +++ b/arch/arm/boards/pine64-pinephone/lowlevel.c
> >>> @@ -0,0 +1,104 @@
> >>> +// SPDX-License-Identifier: GPL-2.0+
> >>> +#include <common.h>
> >>> +#include <debug_ll.h>
> >>> +#include <linux/sizes.h>
> >>> +#include <linux/bitops.h>
> >>> +#include <mach/sunxi/barebox-arm.h>
> >>
> >> This file is missing in this series. Forgot to git add it?
> > ooops, yes forgot to add it.
> > There is almost nothing in it:
> > ```
> > #include <asm/barebox-arm.h>
> > 
> > #define SUN50I_A64_ENTRY_FUNCTION(name, arg0, arg1, arg2) \
> > 	ENTRY_FUNCTION_WITHSTACK(name, SUN50I_PBL_STACK_TOP, arg0, arg1, arg2)
> > ```
> > that's all
> 
> Can this pull in the eGON header as well? That way sun50i entry points
> can just look like normal C functions and board porters need not be aware
> of the magic.
well, I already spent huge amount of time trying to do so and failed so right
now I do not want to try to fit the headers into the entry macro again.
The issue was that I got multiple instances of the each headers because there
where two instance of the entry macro in the same lowlevel.c file...

> > 
> >>> +#include <mach/sunxi/init.h>
> >>> +#include <mach/sunxi/xload.h>
> >>> +#include <mach/sunxi/egon.h>
> >>> +#include <mach/sunxi/rmr_switch.h>
> >>> +#include <mach/sunxi/sun50i-regs.h>
> >>> +#include <mach/sunxi/sunxi-pinctrl.h>
> >>> +
> >>> +#ifdef DEBUG
> >>> +static void debug_led_rgb(int rgb)
> >>> +{
> >>> +	void __iomem *piobase = SUN50I_PIO_BASE_ADDR;
> >>> +	uint32_t clr, set = 0;
> >>> +	int r = rgb & 0xff0000;
> >>> +	int g = rgb & 0x00ff00;
> >>> +	int b = rgb & 0x0000ff;
> >>> +
> >>> +	clr = (1 << 19) | (1 << 18) | (1 << 20);
> >>> +	set |= r ? 1 << 19 : 0;
> >>> +	set |= g ? 1 << 18 : 0;
> >>> +	set |= b ? 1 << 20 : 0;
> >>> +
> >>> +	clrsetbits_le32(piobase + PIO_PD_DATA, clr, set);
> >>> +}
> >>> +
> >>> +static void debug_led_init(void)
> >>> +{
> >>> +	void __iomem *ccubase = SUN50I_CCU_BASE_ADDR;
> >>> +	void __iomem *piobase = SUN50I_PIO_BASE_ADDR;
> >>> +
> >>> +	/* PIO clock enable */
> >>> +	setbits_le32(ccubase + CCU_BUS_CLK_GATE2, BIT(5));
> >>> +	/* LED set output */
> >>> +	clrsetbits_le32(piobase + PIO_PD_CFG2, 0x000fff00, 0x00011100);
> >>> +}
> >>> +#else
> >>> +static void debug_led_rgb(int rgb) {}
> >>> +static void debug_led_init(void) {}
> >>> +#endif
> >>> +
> >>> +SUN50I_A64_ENTRY_FUNCTION(start_pine64_pinephone, r0, r1, r2)
> >>> +{
> >>> +	extern char __dtb_z_sun50i_a64_pinephone_1_2_start[];
> >>> +	void *fdt;
> >>> +	u32 size;
> >>> +
> >>> +	sunxi_switch_to_aarch64(.text_head_soc_header2, SUN50I_A64_RVBAR_IOMAP);
> >>> +
> >>> +	debug_led_init();
> >>> +	debug_led_rgb(0xffff00);
> >>> +
> >>> +	sun50i_cpu_lowlevel_init();
> >>> +	sun50i_uart_setup();
> >>> +
> >>> +	relocate_to_current_adr();
> >>> +	setup_c();
> >>> +
> >>> +	/* Skip SDRAM initialization if we run from it */
> >>> +	if (get_pc() < SUN50I_DRAM_ADDR) {
> >>> +		size = sun50i_a64_lpddr3_dram_init();
> >>> +		if (size == 0) {
> >>> +			puts_ll("FAIL: dram init\r\n");
> >>> +			goto reset;
> >>> +		}
> >>> +		puthex_ll(size);
> >>> +		putc_ll('\r');	putc_ll('\n');
> >>> +	}
> >>
> >> How can we get here with SDRAM uninitialized? Is this for USB or JTAG
> >> boot?
> > Yes this is when not chain loaded, when started directly from USB via fel or
> > via JTAG.
> > 
> >>> +
> >>> +	puts_ll("now booting\r\n");
> >>> +	fdt = __dtb_z_sun50i_a64_pinephone_1_2_start + get_runtime_offset();
> >>> +	barebox_arm_entry(SUN50I_DRAM_ADDR, SZ_1G, fdt);
> >>> +
> >>> +reset:
> >>> +	debug_led_rgb(0xff0000);
> >>> +	sun50i_cpu_lowlevel_reset();
> >>> +}
> >>> +
> >>> +SUN50I_A64_ENTRY_FUNCTION(start_pine64_pinephone_xload, r0, r1, r2)
> >>> +{
> >>> +
> >>> +	sunxi_egon_header(.text_head_soc_header0);
> >>> +	sunxi_switch_to_aarch64(.text_head_soc_header1, SUN50I_A64_RVBAR_IOMAP);
> >>> +
> >>> +	debug_led_init();
> >>> +	debug_led_rgb(0xff0000);
> >>> +
> >>> +	sun50i_cpu_lowlevel_init();
> >>> +	sun50i_uart_setup();
> >>> +	debug_led_rgb(0xffff00);
> >>> +
> >>> +	relocate_to_current_adr();
> >>> +	setup_c();
> >>> +
> >>> +	sun50i_a64_lpddr3_dram_init();
> >>> +
> >>> +	debug_led_rgb(0xff0000);
> >>> +
> >>
> >> You would have to place code here to continue booting, right? In that
> >> case you should add a comment to let the reader know that there's
> >> something missing here.
> > I forgot to add the code that search for barebox.bin and continue execution
> > 
> >>
> >> debug_led_rgb(0xff0000) is the same color you used at the beginning of
> >> the function. Would it make more sense to use a different color?
> > Yes, I'll remove the first red color, I want to reserved it for error conditions.
> > 
> >>> +	sun50i_cpu_lowlevel_reset();
> >>
> >> Maybe hang() here instead to give the user a chance to see the last
> >> color?
> > Yes, I put the reset so it will re-enter fel so the board could be reprogrammed
> > without needing a powercycle, but that's only true if there are no valid boot
> > entry in eMMC nor SD, IMHO this only makes sense for developpement/debugging.
> >  
> >>> +}
> >>> diff --git a/arch/arm/configs/pinephone_defconfig b/arch/arm/configs/pinephone_defconfig
> >>
> >> In the hope that the config is not only suitable for the pinephone
> >> better name it sunxi_v8_defconfig.
> > Yes, currently use this config for the pine64 board, will make this change.
> > 
> >>
> >>> +++ b/arch/arm/mach-sunxi/Kconfig
> >>> @@ -1,7 +1,24 @@
> >>>  if ARCH_SUNXI
> >>>  
> >>> +config ARCH_SUN50I_A64
> >>> +	bool
> >>> +	select CPU_V8
> >>> +	select CPU_SUPPORTS_64BIT_KERNEL
> >>> +	select CLOCKSOURCE_ARM_ARCHITECTED_TIMER
> >>> +	select PINCTRL_SUN50I_A64
> >>> +	select HAS_DEBUG_LL
> >>> +	select PBL_RELOCATABLE
> >>> +	select PBL_FULLY_PIC
> >>> +	help
> >>> +	  Allwiner A64 (sun50iw1) SoC
> >>
> >> s/Allwiner/Allwinner/
> > ack
> > 
> >> Sascha
> >>
> >> -- 
> >> Pengutronix e.K.                           |                             |
> >> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> >> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> >> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
> >>
> > 
> > 
> 
> -- 
> Pengutronix e.K.                           |                             |
> Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
> 
> 



  reply	other threads:[~2023-06-01  6:20 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-24 23:43 [PATCH v2 00/13] Add support for Allwinner (sunxi) A64 SoC Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 01/13] Documentation: sunxi: Add some documentation Jules Maselbas
2023-05-29  9:24   ` Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 02/13] scripts: Add Allwinner eGON image support Jules Maselbas
2023-06-16 22:00   ` Marco Felsch
2023-06-17  7:25     ` Jules Maselbas
2023-06-20  4:52       ` Marco Felsch
2023-06-21  8:26       ` Sascha Hauer
2023-05-24 23:43 ` [PATCH v2 03/13] ARM: sunxi: introduce mach-sunxi Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 04/13] ARM: lds: Add SoC specific sections to go before .text_head_prologue Jules Maselbas
2023-06-01  6:34   ` Ahmad Fatoum
2023-06-01 21:20     ` Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 05/13] ARM: sunxi: Add lowlevel switch to aarch64 Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 06/13] ARM: sunxi: Add debug_ll Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 07/13] clk: Add clock driver for sun50i-a64 Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 08/13] pinctrl: Add sun50i-a64 pinctrl driver Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 09/13] mci: Add sunxi-mmc driver Jules Maselbas
2023-05-30  8:14   ` Sascha Hauer
2023-06-01  6:15     ` Jules Maselbas
2023-06-01  8:35       ` Sascha Hauer
2023-05-24 23:43 ` [PATCH v2 10/13] ARM: sunxi: Add sun50i SDRAM init Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 11/13] ARM: boards: sunxi: Add initial support for the pinephone Jules Maselbas
2023-05-30  8:42   ` Sascha Hauer
2023-06-01  5:50     ` Jules Maselbas
2023-06-01  6:00       ` Ahmad Fatoum
2023-06-01  6:19         ` Jules Maselbas [this message]
2023-06-01  6:36           ` Ahmad Fatoum
2023-06-01  7:09             ` Ahmad Fatoum
2023-05-24 23:43 ` [PATCH v2 12/13] ARM: boards: sunxi: Add pine64 board Jules Maselbas
2023-05-24 23:43 ` [PATCH v2 13/13] ARM: sunxi: xload: Add helpers for chain-loading from SD-card Jules Maselbas

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