Customize reset for HPE iLO

*** 985,995 ****
--- 985,1014 ----
          }
  
          return (DDI_SUCCESS);
  }
  
+ /*
+  * ehci_wait_reset
+  *
+  * wait specified time for chip to reset
+  * with workaround of 250us for HPE iLO chip
+  */
+ static void
+ ehci_wait_reset(ehci_state_t *ehcip, clock_t microsecs)
+ {
+         /* Wait specified times for reset to complete */
+         drv_usecwait(microsecs);
  
+         if (ehcip->ehci_vendor_id == PCI_VENDOR_HP) {
+                 for (int i = 10; i < 250; i += 10) {
+                         /* Wait 10ms for reset to complete */
+                         drv_usecwait(EHCI_RESET_TIMEWAIT);
+                 }
+         }
+ }
+ 
  /*
   * ehci_init_hardware
   *
   * take control from BIOS, reset EHCI host controller, and check version, etc.
   */
*** 1029,1039 ****
          /* Reset the EHCI host controller */
          Set_OpReg(ehci_command,
              Get_OpReg(ehci_command) | EHCI_CMD_HOST_CTRL_RESET);
  
          /* Wait 10ms for reset to complete */
!         drv_usecwait(EHCI_RESET_TIMEWAIT);
  
          ASSERT(Get_OpReg(ehci_status) & EHCI_STS_HOST_CTRL_HALTED);
  
          /* Verify the version number */
          revision = Get_16Cap(ehci_version);
--- 1048,1058 ----
          /* Reset the EHCI host controller */
          Set_OpReg(ehci_command,
              Get_OpReg(ehci_command) | EHCI_CMD_HOST_CTRL_RESET);
  
          /* Wait 10ms for reset to complete */
!         ehci_wait_reset(ehcip, EHCI_RESET_TIMEWAIT);
  
          ASSERT(Get_OpReg(ehci_status) & EHCI_STS_HOST_CTRL_HALTED);
  
          /* Verify the version number */
          revision = Get_16Cap(ehci_version);
*** 3814,3824 ****
          Set_OpReg(ehci_command, ((Get_OpReg(ehci_command) &
              ~EHCI_CMD_INTR_THRESHOLD) |
              (EHCI_CMD_01_INTR | EHCI_CMD_HOST_CTRL_RUN)));
  
          /* Wait 10ms for EHCI to start sending SOF */
!         drv_usecwait(EHCI_RESET_TIMEWAIT);
  
          /*
           * Get the current usb frame number before waiting for
           * few milliseconds.
           */
--- 3833,3843 ----
          Set_OpReg(ehci_command, ((Get_OpReg(ehci_command) &
              ~EHCI_CMD_INTR_THRESHOLD) |
              (EHCI_CMD_01_INTR | EHCI_CMD_HOST_CTRL_RUN)));
  
          /* Wait 10ms for EHCI to start sending SOF */
!         ehci_wait_reset(ehcip, EHCI_RESET_TIMEWAIT);
  
          /*
           * Get the current usb frame number before waiting for
           * few milliseconds.
           */