[coreboot-gerrit] Change in coreboot[master]: siemens/mc_bdx1: Add delay to wait for legacy devices

[Werner Zeh (Code Review)]

Werner Zeh has uploaded this change for review. ( https://review.coreboot.org/21933


Change subject: siemens/mc_bdx1: Add delay to wait for legacy devices
......................................................................

siemens/mc_bdx1: Add delay to wait for legacy devices

Like happend in commit efd0eb35af5e5620331d885d3140c734a6fc9098
(siemens/mc_apl1: Add delay to wait for legacy devices) add the
feature to mc_bdx1 as it uses the same legacy devices.

Change-Id: I355a53ce7aea70098d7bc08f24dc6a4e43d1d618
Signed-off-by: Werner Zeh <werner.zeh at siemens.com>
---
M src/mainboard/siemens/mc_bdx1/mainboard.c
1 file changed, 30 insertions(+), 0 deletions(-)



  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/21933/1

diff --git a/src/mainboard/siemens/mc_bdx1/mainboard.c b/src/mainboard/siemens/mc_bdx1/mainboard.c
index d4d84b5..ea525d4 100644
--- a/src/mainboard/siemens/mc_bdx1/mainboard.c
+++ b/src/mainboard/siemens/mc_bdx1/mainboard.c
@@ -35,6 +35,9 @@
 #include <soc/pci_devs.h>
 #include <soc/irq.h>
 #include <soc/lpc.h>
+#include <bootstate.h>
+#include <timer.h>
+#include <timestamp.h>
 
 #define MAX_PATH_DEPTH		12
 #define MAX_NUM_MAPPINGS	10
@@ -214,6 +217,33 @@
 	return CB_ERR;
 }
 
+static void wait_for_legacy_dev(void *unused)
+{
+	uint32_t legacy_delay, us_since_boot;
+	struct stopwatch sw;
+
+	/* 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);
+
 struct chip_operations mainboard_ops = {
 	.enable_dev = mainboard_enable,
 	.init = mainboard_init,

-- 
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I355a53ce7aea70098d7bc08f24dc6a4e43d1d618
Gerrit-Change-Number: 21933
Gerrit-PatchSet: 1
Gerrit-Owner: Werner Zeh <werner.zeh at siemens.com>
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