diff options
Diffstat (limited to 'src/mainboard/siemens/mc_apl1/mainboard.c')
| -rw-r--r-- | src/mainboard/siemens/mc_apl1/mainboard.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_apl1/mainboard.c b/src/mainboard/siemens/mc_apl1/mainboard.c index 9540d6dca2..b2cd449b87 100644 --- a/src/mainboard/siemens/mc_apl1/mainboard.c +++ b/src/mainboard/siemens/mc_apl1/mainboard.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <bootstate.h> #include <console/console.h> #include <device/mmio.h> #include <device/device.h> @@ -13,6 +14,7 @@ #include <soc/pci_devs.h> #include <string.h> #include <timer.h> +#include <timestamp.h> #include <baseboard/variants.h> #include <types.h> @@ -222,3 +224,33 @@ struct chip_operations mainboard_ops = { .init = mainboard_init, .final = mainboard_final, }; + +static void wait_for_legacy_dev(void *unused) +{ + uint32_t legacy_delay, us_since_boot; + struct stopwatch sw; + + if (CONFIG(BOARD_SIEMENS_MC_APL4)) + return; + + /* Open main hwinfo block. */ + if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS) + return; + + /* Get legacy delay parameter from hwinfo. */ + if (hwilib_get_field(LegacyDelay, (uint8_t *) &legacy_delay, + sizeof(legacy_delay)) != sizeof(legacy_delay)) + return; + + us_since_boot = get_us_since_boot(); + /* No need to wait if the time since boot is already long enough.*/ + if (us_since_boot > legacy_delay) + return; + stopwatch_init_msecs_expire(&sw, (legacy_delay - us_since_boot) / 1000); + printk(BIOS_NOTICE, "Wait remaining %d of %d us for legacy devices...", + legacy_delay - us_since_boot, legacy_delay); + stopwatch_wait_until_expired(&sw); + printk(BIOS_NOTICE, "done!\n"); +} + +BOOT_STATE_INIT_ENTRY(BS_DEV_ENUMERATE, BS_ON_ENTRY, wait_for_legacy_dev, NULL); |