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u-boot/include/configs/sunxi-common.h
Siarhei Siamashka 77ef136950 sunxi: Machine id hack to prevent loading buggy sunxi-3.4 kernels 
Right now U-Boot supports the CONFIG_OLD_SUNXI_KERNEL_COMPAT option,
which makes it go out of its way in limiting the selection of PLL clock
frequencies and PMIC voltages in order not to upset outdated buggy
sunxi-3.4 kernel releases. And if the CONFIG_OLD_SUNXI_KERNEL_COMPAT
option is not set, then booting such old kernels exhibits various
failures at runtime. This is very user unfriendly, and there were
already several incidents when people wasted their time being hit
by these runtime failures and trying to debug them.

The right solution is not to add hacks and workarounds to the mainline
U-Boot, but to fix these bugs in the sunxi-3.4 kernel. And in fact,
the updated sunxi-3.4 kernels already exist. Still we need to follow
the 'Principle of Least Surprise' and U-Boot needs to ensure that
the old buggy kernels are not getting happily booted when the
CONFIG_OLD_SUNXI_KERNEL_COMPAT option is not set. And this patch
addresses this particular issue.

This patch makes U-Boot store the 'compatibility revision' number in
the top 4 bits of the machine id and pass it to the kernel. The old
buggy kernels will fail to load with a very much googlable error
message on the serial console (the "r1 = 0x100010bb" part of it):

  "Error: unrecognized/unsupported machine ID (r1 = 0x100010bb)"

This error message can be documented in the linux-sunxi wiki with
proper explanations about how to resolve this situation and where
to get the necessary bugfixes for the sunxi-3.4 kernel.

The fixed sunxi-3.4 kernels implement a revision compatibility check
and clear the top 4 bits of the machine id if everything is alright.
By accepting the machine id with the bits 31:28 set to 1, the sunxi-3.4
kernel effectively certifies that it has the PLL5 clock speed and
AXP209 DCDC3 voltage fixes applied.

It is still possible to set the CONFIG_OLD_SUNXI_KERNEL_COMPAT option
in U-Boot if the user desires to use an outdated unpatched sunxi-3.4
kernel.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-02-21 16:54:29 +01:00

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/*
* (C) Copyright 2012-2012 Henrik Nordstrom <henrik@henriknordstrom.net>
*
* (C) Copyright 2007-2011
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* Tom Cubie <tangliang@allwinnertech.com>
*
* Configuration settings for the Allwinner sunxi series of boards.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _SUNXI_COMMON_CONFIG_H
#define _SUNXI_COMMON_CONFIG_H
#ifdef CONFIG_OLD_SUNXI_KERNEL_COMPAT
/*
* The U-Boot workarounds bugs in the outdated buggy sunxi-3.4 kernels at the
* expense of restricting some features, so the regular machine id values can
* be used.
*/
# define CONFIG_MACH_TYPE_COMPAT_REV 0
#else
/*
* A compatibility guard to prevent loading outdated buggy sunxi-3.4 kernels.
* Only sunxi-3.4 kernels with appropriate fixes applied are able to pass
* beyond the machine id check.
*/
# define CONFIG_MACH_TYPE_COMPAT_REV 1
#endif
/*
* High Level Configuration Options
*/
#define CONFIG_SUNXI /* sunxi family */
#ifdef CONFIG_SPL_BUILD
#define CONFIG_SYS_THUMB_BUILD /* Thumbs mode to save space in SPL */
#endif
#include <asm/arch/cpu.h> /* get chip and board defs */
#define CONFIG_SYS_TEXT_BASE 0x4a000000
#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_DM)
# define CONFIG_DW_SERIAL
#endif
/*
* Display CPU information
*/
#define CONFIG_DISPLAY_CPUINFO
#define CONFIG_SYS_PROMPT "sunxi# "
/* Serial & console */
#define CONFIG_SYS_NS16550
#define CONFIG_SYS_NS16550_SERIAL
/* ns16550 reg in the low bits of cpu reg */
#define CONFIG_SYS_NS16550_CLK 24000000
#ifndef CONFIG_DM_SERIAL
# define CONFIG_SYS_NS16550_REG_SIZE -4
# define CONFIG_SYS_NS16550_COM1 SUNXI_UART0_BASE
# define CONFIG_SYS_NS16550_COM2 SUNXI_UART1_BASE
# define CONFIG_SYS_NS16550_COM3 SUNXI_UART2_BASE
# define CONFIG_SYS_NS16550_COM4 SUNXI_UART3_BASE
# define CONFIG_SYS_NS16550_COM5 SUNXI_R_UART_BASE
#endif
/* DRAM Base */
#define CONFIG_SYS_SDRAM_BASE 0x40000000
#define CONFIG_SYS_INIT_RAM_ADDR 0x0
#define CONFIG_SYS_INIT_RAM_SIZE 0x8000 /* 32 KiB */
#define CONFIG_SYS_INIT_SP_OFFSET \
(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_INIT_SP_ADDR \
(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
#define CONFIG_NR_DRAM_BANKS 1
#define PHYS_SDRAM_0 CONFIG_SYS_SDRAM_BASE
#define PHYS_SDRAM_0_SIZE 0x80000000 /* 2 GiB */
#ifdef CONFIG_AHCI
#define CONFIG_LIBATA
#define CONFIG_SCSI_AHCI
#define CONFIG_SCSI_AHCI_PLAT
#define CONFIG_SUNXI_AHCI
#define CONFIG_SYS_SCSI_MAX_SCSI_ID 1
#define CONFIG_SYS_SCSI_MAX_LUN 1
#define CONFIG_SYS_SCSI_MAX_DEVICE (CONFIG_SYS_SCSI_MAX_SCSI_ID * \
CONFIG_SYS_SCSI_MAX_LUN)
#define CONFIG_CMD_SCSI
#endif
#define CONFIG_CMD_MEMORY
#define CONFIG_CMD_SETEXPR
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_CMDLINE_TAG
#define CONFIG_INITRD_TAG
/* mmc config */
#if !defined(CONFIG_UART0_PORT_F)
#define CONFIG_MMC
#define CONFIG_GENERIC_MMC
#define CONFIG_CMD_MMC
#define CONFIG_MMC_SUNXI
#define CONFIG_MMC_SUNXI_SLOT 0
#define CONFIG_ENV_IS_IN_MMC
#define CONFIG_SYS_MMC_ENV_DEV 0 /* first detected MMC controller */
#endif
/* 4MB of malloc() pool */
#define CONFIG_SYS_MALLOC_LEN (CONFIG_ENV_SIZE + (4 << 20))
/*
* Miscellaneous configurable options
*/
#define CONFIG_CMD_ECHO
#define CONFIG_SYS_CBSIZE 1024 /* Console I/O Buffer Size */
#define CONFIG_SYS_PBSIZE 1024 /* Print Buffer Size */
#define CONFIG_SYS_MAXARGS 16 /* max number of command args */
#define CONFIG_SYS_GENERIC_BOARD
/* Boot Argument Buffer Size */
#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
#define CONFIG_SYS_LOAD_ADDR 0x42000000 /* default load address */
/* standalone support */
#define CONFIG_STANDALONE_LOAD_ADDR 0x42000000
/* baudrate */
#define CONFIG_BAUDRATE 115200
/* The stack sizes are set up in start.S using the settings below */
#define CONFIG_STACKSIZE (256 << 10) /* 256 KiB */
/* FLASH and environment organization */
#define CONFIG_SYS_NO_FLASH
#define CONFIG_SYS_MONITOR_LEN (512 << 10) /* 512 KiB */
#define CONFIG_IDENT_STRING " Allwinner Technology"
#define CONFIG_ENV_OFFSET (544 << 10) /* (8 + 24 + 512) KiB */
#define CONFIG_ENV_SIZE (128 << 10) /* 128 KiB */
#include <config_cmd_default.h>
#undef CONFIG_CMD_FPGA
#define CONFIG_FAT_WRITE /* enable write access */
#define CONFIG_SPL_FRAMEWORK
#define CONFIG_SPL_LIBCOMMON_SUPPORT
#define CONFIG_SPL_SERIAL_SUPPORT
#define CONFIG_SPL_LIBGENERIC_SUPPORT
#define CONFIG_SPL_BOARD_LOAD_IMAGE
#ifdef CONFIG_SPL_FEL
#define CONFIG_SPL_TEXT_BASE 0x2000
#define CONFIG_SPL_MAX_SIZE 0x4000 /* 16 KiB */
#else /* CONFIG_SPL */
#define CONFIG_SPL_BSS_START_ADDR 0x4ff80000
#define CONFIG_SPL_BSS_MAX_SIZE 0x80000 /* 512 KiB */
#define CONFIG_SPL_TEXT_BASE 0x20 /* sram start+header */
#define CONFIG_SPL_MAX_SIZE 0x5fe0 /* 24KB on sun4i/sun7i */
#define CONFIG_SPL_LIBDISK_SUPPORT
#if !defined(CONFIG_UART0_PORT_F)
#define CONFIG_SPL_MMC_SUPPORT
#endif
#define CONFIG_SPL_LDSCRIPT "arch/arm/cpu/armv7/sunxi/u-boot-spl.lds"
#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 80 /* 40KiB */
#define CONFIG_SPL_PAD_TO 32768 /* decimal for 'dd' */
#endif /* CONFIG_SPL */
/* end of 32 KiB in sram */
#define LOW_LEVEL_SRAM_STACK 0x00008000 /* End of sram */
#define CONFIG_SPL_STACK LOW_LEVEL_SRAM_STACK
#define CONFIG_SYS_SPL_MALLOC_START 0x4ff00000
#define CONFIG_SYS_SPL_MALLOC_SIZE 0x00080000 /* 512 KiB */
/* I2C */
#if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER
#define CONFIG_SPL_I2C_SUPPORT
#endif
#define CONFIG_SYS_I2C
#define CONFIG_SYS_I2C_MVTWSI
#define CONFIG_SYS_I2C_SPEED 400000
#define CONFIG_SYS_I2C_SLAVE 0x7f
#if defined CONFIG_VIDEO_LCD_PANEL_I2C && !(defined CONFIG_SPL_BUILD)
#define CONFIG_SYS_I2C_SOFT
#define CONFIG_SYS_I2C_SOFT_SPEED 50000
#define CONFIG_SYS_I2C_SOFT_SLAVE 0x00
#define CONFIG_VIDEO_LCD_I2C_BUS 0 /* The lcd panel soft i2c is bus 0 */
#define CONFIG_SYS_SPD_BUS_NUM 1 /* And the axp209 i2c bus is bus 1 */
/* We use pin names in Kconfig and sunxi_name_to_gpio() */
#define CONFIG_SOFT_I2C_GPIO_SDA soft_i2c_gpio_sda
#define CONFIG_SOFT_I2C_GPIO_SCL soft_i2c_gpio_scl
#ifndef __ASSEMBLY__
extern int soft_i2c_gpio_sda;
extern int soft_i2c_gpio_scl;
#endif
#endif
#define CONFIG_CMD_I2C
/* PMU */
#if defined CONFIG_AXP152_POWER || defined CONFIG_AXP209_POWER || defined CONFIG_AXP221_POWER
#define CONFIG_SPL_POWER_SUPPORT
#endif
#ifndef CONFIG_CONS_INDEX
#define CONFIG_CONS_INDEX 1 /* UART0 */
#endif
#if CONFIG_CONS_INDEX == 1
#ifdef CONFIG_MACH_SUN9I
#define OF_STDOUT_PATH "/soc/serial@07000000:115200"
#else
#define OF_STDOUT_PATH "/soc@01c00000/serial@01c28000:115200"
#endif
#elif CONFIG_CONS_INDEX == 2 && defined(CONFIG_MACH_SUN5I)
#define OF_STDOUT_PATH "/soc@01c00000/serial@01c28400:115200"
#elif CONFIG_CONS_INDEX == 5 && defined(CONFIG_MACH_SUN8I)
#define OF_STDOUT_PATH "/soc@01c00000/serial@01f02800:115200"
#else
#error Unsupported console port nr. Please fix stdout-path in sunxi-common.h.
#endif
/* GPIO */
#define CONFIG_SUNXI_GPIO
#define CONFIG_SPL_GPIO_SUPPORT
#define CONFIG_CMD_GPIO
#ifdef CONFIG_VIDEO
/*
* The amount of RAM to keep free at the top of RAM when relocating u-boot,
* to use as framebuffer. This must be a multiple of 4096.
*/
#define CONFIG_SUNXI_MAX_FB_SIZE (9 << 20)
/* Do we want to initialize a simple FB? */
#define CONFIG_VIDEO_DT_SIMPLEFB
#define CONFIG_VIDEO_SUNXI
#define CONFIG_CFB_CONSOLE
#define CONFIG_VIDEO_SW_CURSOR
#define CONFIG_VIDEO_LOGO
#define CONFIG_VIDEO_STD_TIMINGS
#define CONFIG_I2C_EDID
/* allow both serial and cfb console. */
#define CONFIG_CONSOLE_MUX
/* stop x86 thinking in cfbconsole from trying to init a pc keyboard */
#define CONFIG_VGA_AS_SINGLE_DEVICE
/* To be able to hook simplefb into dt */
#ifdef CONFIG_VIDEO_DT_SIMPLEFB
#define CONFIG_OF_BOARD_SETUP
#endif
#endif /* CONFIG_VIDEO */
/* Ethernet support */
#ifdef CONFIG_SUNXI_EMAC
#define CONFIG_MII /* MII PHY management */
#endif
#ifdef CONFIG_SUNXI_GMAC
#define CONFIG_DESIGNWARE_ETH /* GMAC can use designware driver */
#define CONFIG_DW_AUTONEG
#define CONFIG_PHY_GIGE /* GMAC can use gigabit PHY */
#define CONFIG_PHY_ADDR 1
#define CONFIG_MII /* MII PHY management */
#define CONFIG_PHYLIB
#endif
#ifdef CONFIG_USB_EHCI
#define CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS 1
#endif
#ifdef CONFIG_USB_MUSB_SUNXI
#define CONFIG_MUSB_HOST
#define CONFIG_MUSB_PIO_ONLY
#endif
#if defined CONFIG_USB_EHCI || defined CONFIG_USB_MUSB_SUNXI
#define CONFIG_CMD_USB
#define CONFIG_USB_STORAGE
#endif
#ifdef CONFIG_USB_KEYBOARD
#define CONFIG_CONSOLE_MUX
#define CONFIG_PREBOOT
#define CONFIG_SYS_STDIO_DEREGISTER
#define CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
#endif
#if !defined CONFIG_ENV_IS_IN_MMC && \
!defined CONFIG_ENV_IS_IN_NAND && \
!defined CONFIG_ENV_IS_IN_FAT && \
!defined CONFIG_ENV_IS_IN_SPI_FLASH
#define CONFIG_ENV_IS_NOWHERE
#endif
#define CONFIG_MISC_INIT_R
#define CONFIG_SYS_CONSOLE_IS_IN_ENV
#ifndef CONFIG_SPL_BUILD
#include <config_distro_defaults.h>
/* Enable pre-console buffer to get complete log on the VGA console */
#define CONFIG_PRE_CONSOLE_BUFFER
#define CONFIG_PRE_CON_BUF_SZ (1024 * 1024)
/* Use the room between the end of bootm_size and the framebuffer */
#define CONFIG_PRE_CON_BUF_ADDR 0x4f000000
/*
* 240M RAM (256M minimum minus space for the framebuffer),
* 32M uncompressed kernel, 16M compressed kernel, 1M fdt,
* 1M script, 1M pxe and the ramdisk at the end.
*/
#define MEM_LAYOUT_ENV_SETTINGS \
"bootm_size=0xf000000\0" \
"kernel_addr_r=0x42000000\0" \
"fdt_addr_r=0x43000000\0" \
"scriptaddr=0x43100000\0" \
"pxefile_addr_r=0x43200000\0" \
"ramdisk_addr_r=0x43300000\0"
#ifdef CONFIG_MMC
#define BOOT_TARGET_DEVICES_MMC(func) func(MMC, mmc, 0)
#else
#define BOOT_TARGET_DEVICES_MMC(func)
#endif
#ifdef CONFIG_AHCI
#define BOOT_TARGET_DEVICES_SCSI(func) func(SCSI, scsi, 0)
#else
#define BOOT_TARGET_DEVICES_SCSI(func)
#endif
#ifdef CONFIG_USB_EHCI
#define BOOT_TARGET_DEVICES_USB(func) func(USB, usb, 0)
#else
#define BOOT_TARGET_DEVICES_USB(func)
#endif
#define BOOT_TARGET_DEVICES(func) \
BOOT_TARGET_DEVICES_MMC(func) \
BOOT_TARGET_DEVICES_SCSI(func) \
BOOT_TARGET_DEVICES_USB(func) \
func(PXE, pxe, na) \
func(DHCP, dhcp, na)
#include <config_distro_bootcmd.h>
#ifdef CONFIG_USB_KEYBOARD
#define CONSOLE_STDIN_SETTINGS \
"preboot=usb start\0" \
"stdin=serial,usbkbd\0"
#else
#define CONSOLE_STDIN_SETTINGS \
"stdin=serial\0"
#endif
#ifdef CONFIG_VIDEO
#define CONSOLE_STDOUT_SETTINGS \
"stdout=serial,vga\0" \
"stderr=serial,vga\0"
#else
#define CONSOLE_STDOUT_SETTINGS \
"stdout=serial\0" \
"stderr=serial\0"
#endif
#define CONSOLE_ENV_SETTINGS \
CONSOLE_STDIN_SETTINGS \
CONSOLE_STDOUT_SETTINGS
#define CONFIG_EXTRA_ENV_SETTINGS \
CONSOLE_ENV_SETTINGS \
MEM_LAYOUT_ENV_SETTINGS \
"fdtfile=" CONFIG_FDTFILE "\0" \
"console=ttyS0,115200\0" \
BOOTENV
#else /* ifndef CONFIG_SPL_BUILD */
#define CONFIG_EXTRA_ENV_SETTINGS
#endif
#endif /* _SUNXI_COMMON_CONFIG_H */
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