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riscv: Support booting SiFive Unmatched from SPI.

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Configure SPI flash devices into SPL.  Add SPI boot option to spl.c.
Document how to format flash for booting.

Signed-off-by: Thomas Skibo <thomas-git@skibo.net>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Thomas Skibo 2021-11-24 14:32:09 -08:00 • committed by Leo Yu-Chi Liang
parent ffb78a7c71
commit 6a863894ad
4 changed files with 51 additions and 0 deletions
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11
arch/riscv/dts/hifive-unmatched-a00-u-boot.dtsi
View file

@ -16,6 +16,10 @@
u-boot,dm-spl;
};
config {
u-boot,spl-payload-offset = <0x105000>; /* loader2 @1044KB */
};
hfclk {
u-boot,dm-spl;
};
@ -30,6 +34,13 @@
clocks = <&rtcclk>;
};
&qspi0 {
u-boot,dm-spl;
flash@0 {
u-boot,dm-spl;
};
};
&spi0 {
mmc@0 {
u-boot,dm-spl;

3
board/sifive/unmatched/spl.c
View file

@ -22,6 +22,7 @@
#define GEM_PHY_RESET SIFIVE_GENERIC_GPIO_NR(0, 12)
#define MODE_SELECT_REG 0x1000
#define MODE_SELECT_SPI 0x6
#define MODE_SELECT_SD 0xb
#define MODE_SELECT_MASK GENMASK(3, 0)
@ -123,6 +124,8 @@ u32 spl_boot_device(void)
u32 boot_device = mode_select & MODE_SELECT_MASK;
switch (boot_device) {
case MODE_SELECT_SPI:
return BOOT_DEVICE_SPI;
case MODE_SELECT_SD:
return BOOT_DEVICE_MMC1;
default:

6
configs/sifive_unmatched_defconfig
View file

@ -8,6 +8,7 @@ CONFIG_SPL_DM_SPI=y
CONFIG_DEFAULT_DEVICE_TREE="hifive-unmatched-a00"
CONFIG_SPL_MMC=y
CONFIG_SPL=y
CONFIG_SPL_SPI_FLASH_SUPPORT=y
CONFIG_SPL_SPI=y
CONFIG_AHCI=y
CONFIG_TARGET_SIFIVE_UNMATCHED=y
@ -23,17 +24,22 @@ CONFIG_DISPLAY_BOARDINFO=y
CONFIG_DISPLAY_BOARDINFO_LATE=y
CONFIG_ID_EEPROM=y
CONFIG_SPL_SEPARATE_BSS=y
CONFIG_SPL_DM_SPI_FLASH=y
CONFIG_SPL_DM_RESET=y
CONFIG_SPL_SPI_LOAD=y
CONFIG_CMD_EEPROM=y
CONFIG_CMD_MEMINFO=y
CONFIG_CMD_PWM=y
CONFIG_CMD_GPT_RENAME=y
CONFIG_CMD_PCI=y
CONFIG_CMD_USB=y
CONFIG_USE_ENV_SPI_BUS=y
CONFIG_ENV_SPI_BUS=1
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_SCSI_AHCI=y
CONFIG_AHCI_PCI=y
CONFIG_SPL_CLK=y
CONFIG_SPI_FLASH_ISSI=y
CONFIG_SYS_I2C_EEPROM_ADDR=0x54
CONFIG_E1000=y
CONFIG_NVME=y

31
doc/board/sifive/unmatched.rst
View file

@ -534,3 +534,34 @@ Sample boot log from HiFive Unmatched board
OpenEmbedded nodistro.0 unmatched ttySIF0
unmatched login:
Booting from SPI
----------------
Use Building steps from "Booting from uSD using U-Boot SPL" section.
Partition the SPI in Linux via mtdblock. The partition types here are
"HiFive Unleashed FSBL", "HiFive Unleashed BBL", and "U-Boot environment"
for partitions one through three respectively.
.. code-block:: none
sgdisk --clear -a 1 \
--new=1:40:2087 --change-name=1:spl --typecode=1:5B193300-FC78-40CD-8002-E86C45580B47 \
--new=2:2088:10279 --change-name=2:uboot --typecode=2:2E54B353-1271-4842-806F-E436D6AF6985 \
--new=3:10280:10535 --change-name=3:env --typecode=3:3DE21764-95BD-54BD-A5C3-4ABE786F38A8 \
/dev/mtdblock0
Write U-boot SPL and U-boot to their partitions.
.. code-block:: none
dd if=u-boot-spl.bin of=/dev/mtdblock0 bs=4096 seek=5 conv=sync
dd if=u-boot.itb of=/dev/mtdblock0 bs=4096 seek=261 conv=sync
Power off the board.
Change DIP switches MSEL[3:0] to 0110.
Power up the board.