FreeBSD-5.3/sys/dev/usb/ehci_pci.c
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (augustss@carlstedt.se) at
* Carlstedt Research & Technology.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/dev/usb/ehci_pci.c,v 1.14 2004/08/02 15:37:34 iedowse Exp $");
/*
* USB Enhanced Host Controller Driver, a.k.a. USB 2.0 controller.
*
* The EHCI 1.0 spec can be found at
* http://developer.intel.com/technology/usb/download/ehci-r10.pdf
* and the USB 2.0 spec at
* http://www.usb.org/developers/docs/usb_20.zip
*/
/* The low level controller code for EHCI has been split into
* PCI probes and EHCI specific code. This was done to facilitate the
* sharing of code between *BSD's
*/
#include "opt_bus.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/queue.h>
#include <sys/lockmgr.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>
#include <dev/usb/ehcireg.h>
#include <dev/usb/ehcivar.h>
#define PCI_EHCI_VENDORID_ACERLABS 0x10b9
#define PCI_EHCI_VENDORID_AMD 0x1022
#define PCI_EHCI_VENDORID_APPLE 0x106b
#define PCI_EHCI_VENDORID_CMDTECH 0x1095
#define PCI_EHCI_VENDORID_INTEL 0x8086
#define PCI_EHCI_VENDORID_NEC 0x1033
#define PCI_EHCI_VENDORID_OPTI 0x1045
#define PCI_EHCI_VENDORID_SIS 0x1039
#define PCI_EHCI_VENDORID_NVIDIA 0x12D2
#define PCI_EHCI_VENDORID_NVIDIA2 0x10DE
#define PCI_EHCI_VENDORID_VIA 0x1106
#define PCI_EHCI_DEVICEID_NEC 0x00e01033
static const char *ehci_device_nec = "NEC uPD 720100 USB 2.0 controller";
#define PCI_EHCI_DEVICEID_VIA 0x31041106
static const char *ehci_device_via = "VIA VT6202 USB 2.0 controller";
static const char *ehci_device_generic = "EHCI (generic) USB 2.0 controller";
#define PCI_EHCI_BASE_REG 0x10
static int ehci_pci_attach(device_t self);
static int ehci_pci_detach(device_t self);
static int ehci_pci_shutdown(device_t self);
static int ehci_pci_suspend(device_t self);
static int ehci_pci_resume(device_t self);
static void ehci_pci_givecontroller(device_t self);
static void ehci_pci_takecontroller(device_t self);
static int
ehci_pci_suspend(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
int err;
err = bus_generic_suspend(self);
if (err)
return (err);
ehci_power(PWR_SUSPEND, sc);
return 0;
}
static int
ehci_pci_resume(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
ehci_pci_takecontroller(self);
ehci_power(PWR_RESUME, sc);
bus_generic_resume(self);
return 0;
}
static int
ehci_pci_shutdown(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
int err;
err = bus_generic_shutdown(self);
if (err)
return (err);
ehci_shutdown(sc);
ehci_pci_givecontroller(self);
return 0;
}
static const char *
ehci_pci_match(device_t self)
{
u_int32_t device_id = pci_get_devid(self);
switch (device_id) {
case PCI_EHCI_DEVICEID_NEC:
return (ehci_device_nec);
case PCI_EHCI_DEVICEID_VIA:
return (ehci_device_via);
default:
if (pci_get_class(self) == PCIC_SERIALBUS
&& pci_get_subclass(self) == PCIS_SERIALBUS_USB
&& pci_get_progif(self) == PCI_INTERFACE_EHCI) {
return (ehci_device_generic);
}
}
return NULL; /* dunno */
}
static int
ehci_pci_probe(device_t self)
{
const char *desc = ehci_pci_match(self);
if (desc) {
device_set_desc(self, desc);
return 0;
} else {
return ENXIO;
}
}
static int
ehci_pci_attach(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
device_t parent;
device_t *neighbors;
device_t *nbus;
struct usbd_bus *bsc;
int err;
int rid;
int ncomp;
int count, buscount;
int slot, function;
int res;
int i;
switch(pci_read_config(self, PCI_USBREV, 1) & PCI_USBREV_MASK) {
case PCI_USBREV_PRE_1_0:
case PCI_USBREV_1_0:
case PCI_USBREV_1_1:
sc->sc_bus.usbrev = USBREV_UNKNOWN;
printf("pre-2.0 USB rev\n");
return ENXIO;
case PCI_USBREV_2_0:
sc->sc_bus.usbrev = USBREV_2_0;
break;
default:
sc->sc_bus.usbrev = USBREV_UNKNOWN;
break;
}
pci_enable_busmaster(self);
rid = PCI_CBMEM;
sc->io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (!sc->io_res) {
device_printf(self, "Could not map memory\n");
return ENXIO;
}
sc->iot = rman_get_bustag(sc->io_res);
sc->ioh = rman_get_bushandle(sc->io_res);
rid = 0;
sc->irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
RF_SHAREABLE | RF_ACTIVE);
if (sc->irq_res == NULL) {
device_printf(self, "Could not allocate irq\n");
ehci_pci_detach(self);
return ENXIO;
}
sc->sc_bus.bdev = device_add_child(self, "usb", -1);
if (!sc->sc_bus.bdev) {
device_printf(self, "Could not add USB device\n");
ehci_pci_detach(self);
return ENOMEM;
}
device_set_ivars(sc->sc_bus.bdev, sc);
/* ehci_pci_match will never return NULL if ehci_pci_probe succeeded */
device_set_desc(sc->sc_bus.bdev, ehci_pci_match(self));
switch (pci_get_vendor(self)) {
case PCI_EHCI_VENDORID_ACERLABS:
sprintf(sc->sc_vendor, "AcerLabs");
break;
case PCI_EHCI_VENDORID_AMD:
sprintf(sc->sc_vendor, "AMD");
break;
case PCI_EHCI_VENDORID_APPLE:
sprintf(sc->sc_vendor, "Apple");
break;
case PCI_EHCI_VENDORID_CMDTECH:
sprintf(sc->sc_vendor, "CMDTECH");
break;
case PCI_EHCI_VENDORID_INTEL:
sprintf(sc->sc_vendor, "Intel");
break;
case PCI_EHCI_VENDORID_NEC:
sprintf(sc->sc_vendor, "NEC");
break;
case PCI_EHCI_VENDORID_OPTI:
sprintf(sc->sc_vendor, "OPTi");
break;
case PCI_EHCI_VENDORID_SIS:
sprintf(sc->sc_vendor, "SiS");
break;
case PCI_EHCI_VENDORID_NVIDIA:
case PCI_EHCI_VENDORID_NVIDIA2:
sprintf(sc->sc_vendor, "nVidia");
break;
case PCI_EHCI_VENDORID_VIA:
sprintf(sc->sc_vendor, "VIA");
break;
default:
if (bootverbose)
device_printf(self, "(New EHCI DeviceId=0x%08x)\n",
pci_get_devid(self));
sprintf(sc->sc_vendor, "(0x%04x)", pci_get_vendor(self));
}
err = bus_setup_intr(self, sc->irq_res, INTR_TYPE_BIO,
(driver_intr_t *) ehci_intr, sc, &sc->ih);
if (err) {
device_printf(self, "Could not setup irq, %d\n", err);
sc->ih = NULL;
ehci_pci_detach(self);
return ENXIO;
}
/*
* Find companion controllers. According to the spec they always
* have lower function numbers so they should be enumerated already.
*/
parent = device_get_parent(self);
res = device_get_children(parent, &neighbors, &count);
if (res != 0) {
device_printf(self, "Error finding companion busses\n");
ehci_pci_detach(self);
return ENXIO;
}
ncomp = 0;
slot = pci_get_slot(self);
function = pci_get_function(self);
for (i = 0; i < count; i++) {
if (pci_get_slot(neighbors[i]) == slot && \
pci_get_function(neighbors[i]) < function) {
res = device_get_children(neighbors[i],
&nbus, &buscount);
if (res != 0 || buscount != 1)
continue;
bsc = device_get_softc(nbus[0]);
printf("ehci_pci_attach: companion %s\n",
USBDEVNAME(bsc->bdev));
sc->sc_comps[ncomp++] = bsc;
if (ncomp >= EHCI_COMPANION_MAX)
break;
}
}
sc->sc_ncomp = ncomp;
ehci_pci_takecontroller(self);
err = ehci_init(sc);
if (!err) {
sc->sc_flags |= EHCI_SCFLG_DONEINIT;
err = device_probe_and_attach(sc->sc_bus.bdev);
}
if (err) {
device_printf(self, "USB init failed err=%d\n", err);
ehci_pci_detach(self);
return EIO;
}
return 0;
}
static int
ehci_pci_detach(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
ehci_detach(sc, 0);
sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
}
/*
* disable interrupts that might have been switched on in ehci_init
*/
if (sc->iot && sc->ioh)
bus_space_write_4(sc->iot, sc->ioh, EHCI_USBINTR, 0);
if (sc->irq_res && sc->ih) {
int err = bus_teardown_intr(self, sc->irq_res, sc->ih);
if (err)
/* XXX or should we panic? */
device_printf(self, "Could not tear down irq, %d\n",
err);
sc->ih = NULL;
}
if (sc->sc_bus.bdev) {
device_delete_child(self, sc->sc_bus.bdev);
sc->sc_bus.bdev = NULL;
}
if (sc->irq_res) {
bus_release_resource(self, SYS_RES_IRQ, 0, sc->irq_res);
sc->irq_res = NULL;
}
if (sc->io_res) {
bus_release_resource(self, SYS_RES_MEMORY, PCI_CBMEM, sc->io_res);
sc->io_res = NULL;
sc->iot = 0;
sc->ioh = 0;
}
return 0;
}
static void
ehci_pci_takecontroller(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
u_int32_t cparams, eec, legsup;
int eecp, i;
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;
legsup = eec;
pci_write_config(self, eecp, legsup | EHCI_LEGSUP_OSOWNED, 4);
if (legsup & EHCI_LEGSUP_BIOSOWNED) {
printf("%s: waiting for BIOS to give up control\n",
USBDEVNAME(sc->sc_bus.bdev));
for (i = 0; i < 5000; i++) {
legsup = pci_read_config(self, eecp, 4);
if ((legsup & EHCI_LEGSUP_BIOSOWNED) == 0)
break;
DELAY(1000);
}
if (legsup & EHCI_LEGSUP_BIOSOWNED)
printf("%s: timed out waiting for BIOS\n",
USBDEVNAME(sc->sc_bus.bdev));
}
}
}
static void
ehci_pci_givecontroller(device_t self)
{
ehci_softc_t *sc = device_get_softc(self);
u_int32_t cparams, eec, legsup;
int eecp;
cparams = EREAD4(sc, EHCI_HCCPARAMS);
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;
legsup = eec;
pci_write_config(self, eecp, legsup & ~EHCI_LEGSUP_OSOWNED, 4);
}
}
static device_method_t ehci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ehci_pci_probe),
DEVMETHOD(device_attach, ehci_pci_attach),
DEVMETHOD(device_detach, ehci_pci_detach),
DEVMETHOD(device_suspend, ehci_pci_suspend),
DEVMETHOD(device_resume, ehci_pci_resume),
DEVMETHOD(device_shutdown, ehci_pci_shutdown),
/* Bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
{0, 0}
};
static driver_t ehci_driver = {
"ehci",
ehci_methods,
sizeof(ehci_softc_t),
};
static devclass_t ehci_devclass;
DRIVER_MODULE(ehci, pci, ehci_driver, ehci_devclass, 0, 0);
DRIVER_MODULE(ehci, cardbus, ehci_driver, ehci_devclass, 0, 0);