usb: Allow configuration of sigatt time (in etc/usb-time-sigatt)

Several users have reported devices that take more than 100ms to
announce their presence on a USB port.  Allow the sigatt timeout to be
specified at runtime as a way to extend the default timeout.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/src/hw/usb.c b/src/hw/usb.c
index e46092c6..2bffd250 100644
--- a/src/hw/usb.c
+++ b/src/hw/usb.c
@@ -8,6 +8,7 @@
 #include "config.h" // CONFIG_*
 #include "malloc.h" // free
 #include "output.h" // dprintf
+#include "romfile.h" // romfile_loadint
 #include "string.h" // memset
 #include "usb.h" // struct usb_s
 #include "usb-ehci.h" // ehci_setup
@@ -455,12 +456,14 @@ resetfail:
     goto done;
 }
 
+u32 usb_time_sigatt;
+
 void
 usb_enumerate(struct usbhub_s *hub)
 {
     u32 portcount = hub->portcount;
     hub->threads = portcount;
-    hub->detectend = timer_calc(USB_TIME_SIGATT);
+    hub->detectend = timer_calc(usb_time_sigatt);
 
     // Launch a thread for every port.
     int i;
@@ -497,5 +500,6 @@ usb_setup(void)
     ASSERT32FLAT();
     if (! CONFIG_USB)
         return;
+    usb_time_sigatt = romfile_loadint("etc/usb-time-sigatt", USB_TIME_SIGATT);
     run_thread(__usb_setup, NULL);
 }