mb/siemens/mc_apl1: Deduplicate wait_for_legacy_dev()

There's one copy of this function for all variants except mc_apl4. Move
one copy into common mainboard.c and exit early if running on mc_apl4.

Change-Id: I4e35b58adc074831ccec433b8e014db0695b955e
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47402
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

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);