Add a bootdev for SPI flash so that these devices can be used with standard boot. It only supports loading a script.
Add a special case for the label, since we want to use "spi", not "spi_flash".
Enable the new bootdev on sandbox.
Signed-off-by: Simon Glass sjg@chromium.org ---
boot/bootdev-uclass.c | 10 +++- boot/bootflow.c | 12 +++++ configs/sandbox_defconfig | 1 + configs/sandbox_flattree_defconfig | 1 + drivers/mtd/spi/Kconfig | 8 +++ drivers/mtd/spi/Makefile | 1 + drivers/mtd/spi/sf-uclass.c | 11 ++++ drivers/mtd/spi/sf_bootdev.c | 82 ++++++++++++++++++++++++++++++ include/bootflow.h | 9 ++++ test/boot/bootdev.c | 19 ++++--- 10 files changed, 144 insertions(+), 10 deletions(-) create mode 100644 drivers/mtd/spi/sf_bootdev.c
diff --git a/boot/bootdev-uclass.c b/boot/bootdev-uclass.c index f43307d006d..dd9ec668e16 100644 --- a/boot/bootdev-uclass.c +++ b/boot/bootdev-uclass.c @@ -375,8 +375,14 @@ static int label_to_uclass(const char *label, int *seqp) log_debug("find %s: seq=%d, id=%d/%s\n", label, seq, id, uclass_get_name(id)); if (id == UCLASS_INVALID) { - log_warning("Unknown uclass '%s' in label\n", label); - return -EINVAL; + /* try some special cases */ + if (IS_ENABLED(CONFIG_BOOTDEV_SPI_FLASH) && + !strncmp("spi", label, len)) { + id = UCLASS_SPI_FLASH; + } else { + log_warning("Unknown uclass '%s' in label\n", label); + return -EINVAL; + } } if (id == UCLASS_USB) id = UCLASS_MASS_STORAGE; diff --git a/boot/bootflow.c b/boot/bootflow.c index 21d4f6b5a9a..463d58c01d8 100644 --- a/boot/bootflow.c +++ b/boot/bootflow.c @@ -439,6 +439,18 @@ int bootflow_iter_check_blk(const struct bootflow_iter *iter) return -ENOTSUPP; }
+int bootflow_iter_check_sf(const struct bootflow_iter *iter) +{ + const struct udevice *media = dev_get_parent(iter->dev); + enum uclass_id id = device_get_uclass_id(media); + + log_debug("uclass %d: %s\n", id, uclass_get_name(id)); + if (id == UCLASS_SPI_FLASH) + return 0; + + return -ENOTSUPP; +} + int bootflow_iter_check_net(const struct bootflow_iter *iter) { const struct udevice *media = dev_get_parent(iter->dev); diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index 02bf0e5df25..6ec2462cf91 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -208,6 +208,7 @@ CONFIG_MMC_SANDBOX=y CONFIG_MMC_SDHCI=y CONFIG_MTD=y CONFIG_SPI_FLASH_SANDBOX=y +CONFIG_BOOTDEV_SPI_FLASH=y CONFIG_SPI_FLASH_ATMEL=y CONFIG_SPI_FLASH_EON=y CONFIG_SPI_FLASH_GIGADEVICE=y diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig index ff4e6a46cc5..bd166ef63d9 100644 --- a/configs/sandbox_flattree_defconfig +++ b/configs/sandbox_flattree_defconfig @@ -135,6 +135,7 @@ CONFIG_PWRSEQ=y CONFIG_I2C_EEPROM=y CONFIG_MMC_SANDBOX=y CONFIG_SPI_FLASH_SANDBOX=y +CONFIG_BOOTDEV_SPI_FLASH=y CONFIG_SPI_FLASH_ATMEL=y CONFIG_SPI_FLASH_EON=y CONFIG_SPI_FLASH_GIGADEVICE=y diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig index 7b858a3a919..a9617c6c58c 100644 --- a/drivers/mtd/spi/Kconfig +++ b/drivers/mtd/spi/Kconfig @@ -80,6 +80,14 @@ config SF_DEFAULT_SPEED
if SPI_FLASH
+config BOOTDEV_SPI_FLASH + bool "SPI Flash bootdev support" + help + Enable a boot device for SPI flash. This allows reading a script + from SPI flash so that it can be used to boot an Operating System. + + If unsure, say N + config SPI_FLASH_SFDP_SUPPORT bool "SFDP table parsing support for SPI NOR flashes" depends on !SPI_FLASH_BAR diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile index 99cc4185522..409395382f5 100644 --- a/drivers/mtd/spi/Makefile +++ b/drivers/mtd/spi/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_SPI_FLASH) += spi-nor.o obj-$(CONFIG_SPI_FLASH_DATAFLASH) += sf_dataflash.o obj-$(CONFIG_$(SPL_TPL_)SPI_FLASH_MTD) += sf_mtd.o obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o +obj-$(CONFIG_$(SPL_TPL_)BOOTDEV_SPI_FLASH) += sf_bootdev.o diff --git a/drivers/mtd/spi/sf-uclass.c b/drivers/mtd/spi/sf-uclass.c index e6e650ef8c0..df1f75390c4 100644 --- a/drivers/mtd/spi/sf-uclass.c +++ b/drivers/mtd/spi/sf-uclass.c @@ -6,6 +6,7 @@ #define LOG_CATEGORY UCLASS_SPI_FLASH
#include <common.h> +#include <bootdev.h> #include <dm.h> #include <log.h> #include <malloc.h> @@ -13,6 +14,7 @@ #include <spi_flash.h> #include <asm/global_data.h> #include <dm/device-internal.h> +#include <test/test.h> #include "sf_internal.h"
DECLARE_GLOBAL_DATA_PTR; @@ -86,6 +88,14 @@ int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
static int spi_flash_post_bind(struct udevice *dev) { + int ret; + + if (CONFIG_IS_ENABLED(BOOTDEV_SPI_FLASH) && test_sf_bootdev_enabled()) { + ret = bootdev_setup_for_dev(dev, "sf_bootdev"); + if (ret) + return log_msg_ret("bd", ret); + } + #if defined(CONFIG_NEEDS_MANUAL_RELOC) struct dm_spi_flash_ops *ops = sf_get_ops(dev); static int reloc_done; @@ -101,6 +111,7 @@ static int spi_flash_post_bind(struct udevice *dev) reloc_done++; } #endif + return 0; }
diff --git a/drivers/mtd/spi/sf_bootdev.c b/drivers/mtd/spi/sf_bootdev.c new file mode 100644 index 00000000000..2272e8567ce --- /dev/null +++ b/drivers/mtd/spi/sf_bootdev.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Read a bootflow from SPI flash + * + * Copyright 2022 Google LLC + */ + +#include <common.h> +#include <bootdev.h> +#include <bootflow.h> +#include <bootmeth.h> +#include <dm.h> +#include <env.h> +#include <malloc.h> +#include <spi_flash.h> + +static int sf_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, + struct bootflow *bflow) +{ + struct udevice *sf = dev_get_parent(dev); + uint size; + char *buf; + int ret; + + /* We only support the whole device, not partitions */ + if (iter->part) + return log_msg_ret("max", -ESHUTDOWN); + + size = env_get_hex("script_size_f", 0); + if (!size) + return log_msg_ret("sz", -EINVAL); + + buf = malloc(size + 1); + if (!buf) + return log_msg_ret("buf", -ENOMEM); + + ret = spi_flash_read_dm(sf, env_get_hex("script_offset_f", 0), + size, buf); + if (ret) + return log_msg_ret("cmd", -EINVAL); + bflow->state = BOOTFLOWST_MEDIA; + + ret = bootmeth_set_bootflow(bflow->method, bflow, buf, size); + if (ret) { + free(buf); + return log_msg_ret("method", ret); + } + + return 0; +} + +static int sf_bootdev_bind(struct udevice *dev) +{ + struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); + + ucp->prio = BOOTDEVP_2_SCAN_FAST; + + return 0; +} + +struct bootdev_ops sf_bootdev_ops = { + .get_bootflow = sf_get_bootflow, +}; + +static const struct udevice_id sf_bootdev_ids[] = { + { .compatible = "u-boot,bootdev-sf" }, + { } +}; + +U_BOOT_DRIVER(sf_bootdev) = { + .name = "sf_bootdev", + .id = UCLASS_BOOTDEV, + .ops = &sf_bootdev_ops, + .bind = sf_bootdev_bind, + .of_match = sf_bootdev_ids, +}; + +BOOTDEV_HUNTER(sf_bootdev_hunter) = { + .prio = BOOTDEVP_2_SCAN_FAST, + .uclass = UCLASS_SPI_FLASH, + .drv = DM_DRIVER_REF(sf_bootdev), +}; diff --git a/include/bootflow.h b/include/bootflow.h index f77bfb6eace..1a240954494 100644 --- a/include/bootflow.h +++ b/include/bootflow.h @@ -320,6 +320,15 @@ void bootflow_remove(struct bootflow *bflow); */ int bootflow_iter_check_blk(const struct bootflow_iter *iter);
+/** + * bootflow_iter_check_sf() - Check that a bootflow uses SPI FLASH + * + * This checks the bootdev in the bootflow to make sure it uses SPI flash + * + * Return: 0 if OK, -ENOTSUPP if some other device is used (e.g. ethernet) + */ +int bootflow_iter_check_sf(const struct bootflow_iter *iter); + /** * bootflow_iter_check_net() - Check that a bootflow uses a network device * diff --git a/test/boot/bootdev.c b/test/boot/bootdev.c index 2ad31a0ef66..ea0703fa5c8 100644 --- a/test/boot/bootdev.c +++ b/test/boot/bootdev.c @@ -243,9 +243,10 @@ static int bootdev_test_hunter(struct unit_test_state *uts) ut_assert_nextline(" 10 mmc mmc_bootdev"); ut_assert_nextline(" 30 nvme nvme_bootdev"); ut_assert_nextline(" 30 scsi scsi_bootdev"); + ut_assert_nextline(" 30 spi_flash sf_bootdev"); ut_assert_nextline(" 40 usb usb_bootdev"); ut_assert_nextline(" 30 virtio virtio_bootdev"); - ut_assert_nextline("(total hunters: 7)"); + ut_assert_nextline("(total hunters: 8)"); ut_assert_console_end();
ut_assertok(bootdev_hunt("usb1", false)); @@ -253,8 +254,8 @@ static int bootdev_test_hunter(struct unit_test_state *uts) "Bus usb@1: scanning bus usb@1 for devices... 5 USB Device(s) found"); ut_assert_console_end();
- /* USB is fifth in the list, so bit 5 */ - ut_asserteq(BIT(5), std->hunters_used); + /* USB is fifth in the list, so bit 6 */ + ut_asserteq(BIT(6), std->hunters_used);
return 0; } @@ -274,7 +275,7 @@ static int bootdev_test_cmd_hunt(struct unit_test_state *uts) ut_assertok(run_command("bootdev hunt -l", 0)); ut_assert_nextline("Prio Used Uclass Hunter"); ut_assert_nextlinen("----"); - ut_assert_skip_to_line("(total hunters: 7)"); + ut_assert_skip_to_line("(total hunters: 8)"); ut_assert_console_end();
/* Scan all hunters */ @@ -288,10 +289,11 @@ static int bootdev_test_cmd_hunt(struct unit_test_state *uts) ut_assert_nextline("Hunting with: nvme"); ut_assert_nextline("Hunting with: scsi"); ut_assert_nextline("scanning bus for devices..."); - ut_assert_skip_to_line("Hunting with: usb"); + ut_assert_skip_to_line("Hunting with: spi_flash"); + ut_assert_nextline("Hunting with: usb"); ut_assert_nextline( "Bus usb@1: scanning bus usb@1 for devices... 5 USB Device(s) found"); - ut_assert_skip_to_line("Hunting with: virtio"); + ut_assert_nextline("Hunting with: virtio"); ut_assert_console_end();
/* List available hunters */ @@ -303,12 +305,13 @@ static int bootdev_test_cmd_hunt(struct unit_test_state *uts) ut_assert_nextline(" 10 * mmc mmc_bootdev"); ut_assert_nextline(" 30 * nvme nvme_bootdev"); ut_assert_nextline(" 30 * scsi scsi_bootdev"); + ut_assert_nextline(" 30 * spi_flash sf_bootdev"); ut_assert_nextline(" 40 * usb usb_bootdev"); ut_assert_nextline(" 30 * virtio virtio_bootdev"); - ut_assert_nextline("(total hunters: 7)"); + ut_assert_nextline("(total hunters: 8)"); ut_assert_console_end();
- ut_asserteq(GENMASK(6, 0), std->hunters_used); + ut_asserteq(GENMASK(7, 0), std->hunters_used);
return 0; }