From 77cbe30ea95e622c99b9e518406e24c231d89b72 Mon Sep 17 00:00:00 2001
From: Andrew Thompson <thompsa@FreeBSD.org>
Date: Mon, 26 Oct 2009 20:23:15 +0000
Subject: [PATCH] Remove usb controller takeover code now that it is handled by
 the pci code.

Reminded by:	jhb
Reviewed by:	HPS
---
 sys/dev/usb/controller/ehci_pci.c | 49 -------------------------------
 sys/dev/usb/controller/ohci.c     | 24 ---------------
 sys/dev/usb/controller/uhci_pci.c | 15 ----------
 3 files changed, 88 deletions(-)

diff --git a/sys/dev/usb/controller/ehci_pci.c b/sys/dev/usb/controller/ehci_pci.c
index fc2035bd2974..5931c51b82b8 100644
--- a/sys/dev/usb/controller/ehci_pci.c
+++ b/sys/dev/usb/controller/ehci_pci.c
@@ -102,8 +102,6 @@ __FBSDID("$FreeBSD$");
 
 #define	PCI_EHCI_BASE_REG	0x10
 
-static void ehci_pci_takecontroller(device_t self);
-
 static device_probe_t ehci_pci_probe;
 static device_attach_t ehci_pci_attach;
 static device_detach_t ehci_pci_detach;
@@ -129,7 +127,6 @@ ehci_pci_resume(device_t self)
 {
 	ehci_softc_t *sc = device_get_softc(self);
 
-	ehci_pci_takecontroller(self);
 	ehci_resume(sc);
 
 	bus_generic_resume(self);
@@ -414,7 +411,6 @@ ehci_pci_attach(device_t self)
 		sc->sc_intr_hdl = NULL;
 		goto error;
 	}
-	ehci_pci_takecontroller(self);
 
 	/* Undocumented quirks taken from Linux */
 
@@ -506,51 +502,6 @@ ehci_pci_detach(device_t self)
 	return (0);
 }
 
-static void
-ehci_pci_takecontroller(device_t self)
-{
-	ehci_softc_t *sc = device_get_softc(self);
-	uint32_t cparams;
-	uint32_t eec;
-	uint16_t to;
-	uint8_t eecp;
-	uint8_t bios_sem;
-
-	cparams = EREAD4(sc, EHCI_HCCPARAMS);
-
-	/* Synchronise with the BIOS if it owns the controller. */
-	for (eecp = EHCI_HCC_EECP(cparams); eecp != 0;
-	    eecp = EHCI_EECP_NEXT(eec)) {
-		eec = pci_read_config(self, eecp, 4);
-		if (EHCI_EECP_ID(eec) != EHCI_EC_LEGSUP) {
-			continue;
-		}
-		bios_sem = pci_read_config(self, eecp +
-		    EHCI_LEGSUP_BIOS_SEM, 1);
-		if (bios_sem == 0) {
-			continue;
-		}
-		device_printf(sc->sc_bus.bdev, "waiting for BIOS "
-		    "to give up control\n");
-		pci_write_config(self, eecp +
-		    EHCI_LEGSUP_OS_SEM, 1, 1);
-		to = 500;
-		while (1) {
-			bios_sem = pci_read_config(self, eecp +
-			    EHCI_LEGSUP_BIOS_SEM, 1);
-			if (bios_sem == 0)
-				break;
-
-			if (--to == 0) {
-				device_printf(sc->sc_bus.bdev,
-				    "timed out waiting for BIOS\n");
-				break;
-			}
-			usb_pause_mtx(NULL, hz / 100);	/* wait 10ms */
-		}
-	}
-}
-
 static driver_t ehci_driver =
 {
 	.name = "ehci",
diff --git a/sys/dev/usb/controller/ohci.c b/sys/dev/usb/controller/ohci.c
index 637b639e3f6f..2ced6765dadc 100644
--- a/sys/dev/usb/controller/ohci.c
+++ b/sys/dev/usb/controller/ohci.c
@@ -175,30 +175,6 @@ ohci_controller_init(ohci_softc_t *sc)
 	uint32_t per;
 	uint32_t desca;
 
-	/* Determine in what context we are running. */
-	ctl = OREAD4(sc, OHCI_CONTROL);
-	if (ctl & OHCI_IR) {
-		/* SMM active, request change */
-		DPRINTF("SMM active, request owner change\n");
-		OWRITE4(sc, OHCI_COMMAND_STATUS, OHCI_OCR);
-		for (i = 0; (i < 100) && (ctl & OHCI_IR); i++) {
-			usb_pause_mtx(NULL, hz / 1000);
-			ctl = OREAD4(sc, OHCI_CONTROL);
-		}
-		if (ctl & OHCI_IR) {
-			device_printf(sc->sc_bus.bdev,
-			    "SMM does not respond, resetting\n");
-			OWRITE4(sc, OHCI_CONTROL, OHCI_HCFS_RESET);
-			goto reset;
-		}
-	} else {
-		DPRINTF("cold started\n");
-reset:
-		/* controller was cold started */
-		usb_pause_mtx(NULL,
-		    USB_MS_TO_TICKS(USB_BUS_RESET_DELAY));
-	}
-
 	/*
 	 * This reset should not be necessary according to the OHCI spec, but
 	 * without it some controllers do not start.
diff --git a/sys/dev/usb/controller/uhci_pci.c b/sys/dev/usb/controller/uhci_pci.c
index 3956eada4232..e367b23597af 100644
--- a/sys/dev/usb/controller/uhci_pci.c
+++ b/sys/dev/usb/controller/uhci_pci.c
@@ -115,8 +115,6 @@ uhci_pci_resume(device_t self)
 {
 	uhci_softc_t *sc = device_get_softc(self);
 
-	pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
-
 	uhci_resume(sc);
 
 	bus_generic_resume(self);
@@ -363,19 +361,6 @@ uhci_pci_attach(device_t self)
 		sc->sc_intr_hdl = NULL;
 		goto error;
 	}
-	/*
-	 * Set the PIRQD enable bit and switch off all the others. We don't
-	 * want legacy support to interfere with us XXX Does this also mean
-	 * that the BIOS won't touch the keyboard anymore if it is connected
-	 * to the ports of the root hub?
-	 */
-#ifdef USB_DEBUG
-	if (pci_read_config(self, PCI_LEGSUP, 2) != PCI_LEGSUP_USBPIRQDEN) {
-		device_printf(self, "LegSup = 0x%04x\n",
-		    pci_read_config(self, PCI_LEGSUP, 2));
-	}
-#endif
-	pci_write_config(self, PCI_LEGSUP, PCI_LEGSUP_USBPIRQDEN, 2);
 
 	err = uhci_init(sc);
 	if (!err) {