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a6d9a40e81
freebsd/sys/dev/usb/uhub.c
Bill Paul a6d9a40e81 More USB ethernet tweaks: 
- Sync ohci, uhci and usbdi modules with NetBSD in order to obtain the
  following improvements:
        o New USBD_NO_TSLEEP flag can be used in place of UQ_NO_TSLEEP
          quirk. This allows drivers to specify busy waiting only for
          certain transfers (namely control transfers for reading/writing
          registers and stuff).
        o New USBD_FORCE_SHORT_XFER flag can be used to deal with
          devices like the ADMtek Pegasus that sense the end of bulk OUT
          transfers in a special way (if a transfer is exactly a multiple
          of 64 bytes in size, you need to send an extra empty packet
          to terminate the transfer).
        o usbd_open_pipe_intr() now accepts an interval argument which
          can be used to change the rate at which the interrupt callback
          routine is invoked. Specifying USBD_DEFAULT_INTERVAL uses the
          value specified in the device's config data, but drivers can
          override it if needed.
- Change if_aue to use USBD_FORCE_SHORT_XFER for packet transmissions.
- Change if_aue, if_kue and if_cue to use USBD_NO_TSLEEP for all
  control transfers. We no longer force the non-tsleep hack for
  bulk transfers since these are done asynchronously anyway.
- Removed quirk entry fiddling from if_aue and if_kue since we don't
  need it anymore now that we have the USBD_NO_TSLEEP flag.
- Tweak ulpt, uhid, ums and ukbd drivers to use the new arg to
  usbd_open_pipe_intr().
- Add a flag to the softc struct in the ethernet drivers to indicate
  when a device has been detached, and use this flag to perform
  tests to prevent the drivers from trying to do control transfers
  if this is the case. This is necessary because calling if_detach()
  with INET6 enabled will eventually result in a call to the driver's
  ioctl() routine to delete the multicast groups on the interface,
  which will result in attempts to perform control transfers. (It's
  possible this also happens even without INET6 support enabled.) This
  is pointless since we know that if the detach method has been called,
  the hardware has been unplugged.
- Changed watchdog timeout routines to just call the driver init routines
  to initialize the device states without trying to close and re-open the
  pipes. This is partly because we don't want to frob things at interrupt
  context, but also because this doesn't seem to work right and I don't
  want to panic the system just because a USB device may have stopped
  responding.
- Fix aue_rxeof() to be a little smarter about detecting when a double
  transfer is needed. Unfortunately, the design of the chip makes it hard
  to get this exactly right. Hopefully, this will go away once either
  Nick or Lennart finds the bug in the uhci driver that makes this ugly
  hack necessary.
- Also sync usbdevs with NetBSD.
2000-01-20 07:38:33 +00:00

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/* $NetBSD: uhub.c,v 1.34 1999/11/18 23:32:29 augustss Exp $ */
/* $FreeBSD$ */
/*
* 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.
*/
/*
* USB spec: http://www.usb.org/cgi-usb/mailmerge.cgi/home/usb/docs/developers/cgiform.tpl
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#if defined(__NetBSD__) || defined(__OpenBSD__)
#include <sys/device.h>
#include <sys/proc.h>
#elif defined(__FreeBSD__)
#include <sys/module.h>
#include <sys/bus.h>
#include "bus_if.h"
#endif
#include <machine/bus.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdivar.h>
#ifdef UHUB_DEBUG
#define DPRINTF(x) if (uhubdebug) logprintf x
#define DPRINTFN(n,x) if (uhubdebug>(n)) logprintf x
int uhubdebug;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
struct uhub_softc {
USBBASEDEVICE sc_dev; /* base device */
usbd_device_handle sc_hub; /* USB device */
usbd_pipe_handle sc_ipipe; /* interrupt pipe */
u_int8_t sc_status[1]; /* XXX more ports */
u_char sc_running;
};
static usbd_status uhub_init_port __P((struct usbd_port *));
static usbd_status uhub_explore __P((usbd_device_handle hub));
static void uhub_intr __P((usbd_xfer_handle, usbd_private_handle,usbd_status));
#if defined(__FreeBSD__)
static bus_child_detached_t uhub_child_detached;
#endif
/*
* We need two attachment points:
* hub to usb and hub to hub
* Every other driver only connects to hubs
*/
#if defined(__NetBSD__) || defined(__OpenBSD__)
USB_DECLARE_DRIVER(uhub);
/* Create the driver instance for the hub connected to hub case */
struct cfattach uhub_uhub_ca = {
sizeof(struct uhub_softc), uhub_match, uhub_attach,
uhub_detach, uhub_activate
};
#elif defined(__FreeBSD__)
USB_DECLARE_DRIVER_INIT(uhub,
DEVMETHOD(bus_child_detached, uhub_child_detached));
/* Create the driver instance for the hub connected to usb case. */
devclass_t uhubroot_devclass;
static device_method_t uhubroot_methods[] = {
DEVMETHOD(device_probe, uhub_match),
DEVMETHOD(device_attach, uhub_attach),
/* detach is not allowed for a root hub */
{0,0}
};
static driver_t uhubroot_driver = {
"uhub",
uhubroot_methods,
sizeof(struct uhub_softc)
};
#endif
USB_MATCH(uhub)
{
USB_MATCH_START(uhub, uaa);
usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device);
DPRINTFN(5,("uhub_match, dd=%p\n", dd));
/*
* The subclass for hubs seems to be 0 for some and 1 for others,
* so we just ignore the subclass.
*/
if (uaa->iface == NULL && dd->bDeviceClass == UCLASS_HUB)
return (UMATCH_DEVCLASS_DEVSUBCLASS);
return (UMATCH_NONE);
}
USB_ATTACH(uhub)
{
USB_ATTACH_START(uhub, sc, uaa);
usbd_device_handle dev = uaa->device;
char devinfo[1024];
usbd_status err;
struct usbd_hub *hub;
usb_device_request_t req;
usb_hub_descriptor_t hubdesc;
int p, port, nports, nremov;
usbd_interface_handle iface;
usb_endpoint_descriptor_t *ed;
DPRINTFN(1,("uhub_attach\n"));
sc->sc_hub = dev;
usbd_devinfo(dev, 1, devinfo);
USB_ATTACH_SETUP;
printf("%s: %s\n", USBDEVNAME(sc->sc_dev), devinfo);
err = usbd_set_config_index(dev, 0, 1);
if (err) {
DPRINTF(("%s: configuration failed, error=%s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
USB_ATTACH_ERROR_RETURN;
}
if (dev->depth > USB_HUB_MAX_DEPTH) {
printf("%s: hub depth (%d) exceeded, hub ignored\n",
USBDEVNAME(sc->sc_dev), USB_HUB_MAX_DEPTH);
USB_ATTACH_ERROR_RETURN;
}
/* Get hub descriptor. */
req.bmRequestType = UT_READ_CLASS_DEVICE;
req.bRequest = UR_GET_DESCRIPTOR;
USETW(req.wValue, 0);
USETW(req.wIndex, 0);
USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE);
DPRINTFN(1,("usb_init_hub: getting hub descriptor\n"));
err = usbd_do_request(dev, &req, &hubdesc);
nports = hubdesc.bNbrPorts;
if (!err && nports > 7) {
USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
err = usbd_do_request(dev, &req, &hubdesc);
}
if (err) {
DPRINTF(("%s: getting hub descriptor failed, error=%s\n",
USBDEVNAME(sc->sc_dev), usbd_errstr(err)));
USB_ATTACH_ERROR_RETURN;
}
for (nremov = 0, port = 1; port <= nports; port++)
if (!UHD_NOT_REMOV(&hubdesc, port))
nremov++;
printf("%s: %d port%s with %d removable, %s powered\n",
USBDEVNAME(sc->sc_dev), nports, nports != 1 ? "s" : "",
nremov, dev->self_powered ? "self" : "bus");
hub = malloc(sizeof(*hub) + (nports-1) * sizeof(struct usbd_port),
M_USBDEV, M_NOWAIT);
if (hub == NULL)
USB_ATTACH_ERROR_RETURN;
dev->hub = hub;
dev->hub->hubsoftc = sc;
hub->explore = uhub_explore;
hub->hubdesc = hubdesc;
DPRINTFN(1,("usbhub_init_hub: selfpowered=%d, parent=%p, "
"parent->selfpowered=%d\n",
dev->self_powered, dev->powersrc->parent,
dev->powersrc->parent ?
dev->powersrc->parent->self_powered : 0));
if (!dev->self_powered && dev->powersrc->parent != NULL &&
!dev->powersrc->parent->self_powered) {
printf("%s: bus powered hub connected to bus powered hub, "
"ignored\n", USBDEVNAME(sc->sc_dev));
goto bad;
}
/* Set up interrupt pipe. */
err = usbd_device2interface_handle(dev, 0, &iface);
if (err) {
printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));
goto bad;
}
ed = usbd_interface2endpoint_descriptor(iface, 0);
if (ed == NULL) {
printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));
goto bad;
}
if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));
goto bad;
}
err = usbd_open_pipe_intr(iface, ed->bEndpointAddress,
USBD_SHORT_XFER_OK, &sc->sc_ipipe, sc, sc->sc_status,
sizeof(sc->sc_status), uhub_intr, USBD_DEFAULT_INTERVAL);
if (err) {
printf("%s: cannot open interrupt pipe\n",
USBDEVNAME(sc->sc_dev));
goto bad;
}
/* Wait with power off for a while. */
usbd_delay_ms(dev, USB_POWER_DOWN_TIME);
for (p = 0; p < nports; p++) {
struct usbd_port *up = &hub->ports[p];
up->device = 0;
up->parent = dev;
up->portno = p+1;
err = uhub_init_port(up);
if (err)
printf("%s: init of port %d failed\n",
USBDEVNAME(sc->sc_dev), up->portno);
}
sc->sc_running = 1;
USB_ATTACH_SUCCESS_RETURN;
bad:
free(hub, M_USBDEV);
dev->hub = 0;
USB_ATTACH_ERROR_RETURN;
}
usbd_status
uhub_init_port(up)
struct usbd_port *up;
{
int port = up->portno;
usbd_device_handle dev = up->parent;
usbd_status err;
u_int16_t pstatus;
err = usbd_get_port_status(dev, port, &up->status);
if (err)
return (err);
pstatus = UGETW(up->status.wPortStatus);
DPRINTF(("usbd_init_port: adding hub port=%d status=0x%04x "
"change=0x%04x\n",
port, pstatus, UGETW(up->status.wPortChange)));
if ((pstatus & UPS_PORT_POWER) == 0) {
/* Port lacks power, turn it on */
/* First let the device go through a good power cycle, */
usbd_delay_ms(dev, USB_PORT_POWER_DOWN_TIME);
#if 0
usbd_clear_hub_feature(dev, UHF_C_HUB_OVER_CURRENT);
usbd_clear_port_feature(dev, port, UHF_C_PORT_OVER_CURRENT);
#endif
/* then turn the power on. */
err = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
if (err)
return (err);
DPRINTF(("usb_init_port: turn on port %d power status=0x%04x "
"change=0x%04x\n",
port, UGETW(up->status.wPortStatus),
UGETW(up->status.wPortChange)));
/* Wait for stable power. */
usbd_delay_ms(dev, dev->hub->hubdesc.bPwrOn2PwrGood *
UHD_PWRON_FACTOR);
/* Get the port status again. */
err = usbd_get_port_status(dev, port, &up->status);
if (err)
return (err);
DPRINTF(("usb_init_port: after power on status=0x%04x "
"change=0x%04x\n",
UGETW(up->status.wPortStatus),
UGETW(up->status.wPortChange)));
#if 0
usbd_clear_hub_feature(dev, UHF_C_HUB_OVER_CURRENT);
usbd_clear_port_feature(dev, port, UHF_C_PORT_OVER_CURRENT);
usbd_get_port_status(dev, port, &up->status);
#endif
pstatus = UGETW(up->status.wPortStatus);
if ((pstatus & UPS_PORT_POWER) == 0)
printf("%s: port %d did not power up\n",
USBDEVNAME(((struct uhub_softc *)dev->hub->hubsoftc)->sc_dev), port);
}
if (dev->self_powered)
/* Self powered hub, give ports maximum current. */
up->power = USB_MAX_POWER;
else
up->power = USB_MIN_POWER;
return (USBD_NORMAL_COMPLETION);
}
usbd_status
uhub_explore(dev)
usbd_device_handle dev;
{
usb_hub_descriptor_t *hd = &dev->hub->hubdesc;
struct uhub_softc *sc = dev->hub->hubsoftc;
struct usbd_port *up;
usbd_status err;
int port;
int change, status;
DPRINTFN(10, ("uhub_explore dev=%p addr=%d\n", dev, dev->address));
if (!sc->sc_running)
return (USBD_NOT_STARTED);
/* Ignore hubs that are too deep. */
if (dev->depth > USB_HUB_MAX_DEPTH)
return (USBD_TOO_DEEP);
for(port = 1; port <= hd->bNbrPorts; port++) {
up = &dev->hub->ports[port-1];
err = usbd_get_port_status(dev, port, &up->status);
if (err) {
DPRINTF(("uhub_explore: get port status failed, "
"error=%s\n", usbd_errstr(err)));
continue;
}
status = UGETW(up->status.wPortStatus);
change = UGETW(up->status.wPortChange);
DPRINTFN(3,("uhub_explore: port %d status 0x%04x 0x%04x\n",
port, status, change));
if (change & UPS_C_PORT_ENABLED) {
DPRINTF(("uhub_explore: C_PORT_ENABLED\n"));
usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
if (status & UPS_PORT_ENABLED) {
printf("%s: illegal enable change, port %d\n",
USBDEVNAME(sc->sc_dev), port);
} else {
/* Port error condition. */
if (up->restartcnt++ < USBD_RESTART_MAX) {
printf("%s: port error, restarting "
"port %d\n",
USBDEVNAME(sc->sc_dev), port);
goto disco;
} else {
printf("%s: port error, giving up "
"port %d\n",
USBDEVNAME(sc->sc_dev), port);
}
}
}
if (!(change & UPS_C_CONNECT_STATUS)) {
DPRINTFN(3,("uhub_explore: port=%d !C_CONNECT_"
"STATUS\n", port));
/* No status change, just do recursive explore. */
if (up->device && up->device->hub)
up->device->hub->explore(up->device);
continue;
}
DPRINTF(("uhub_explore: status change hub=%d port=%d\n",
dev->address, port));
usbd_clear_port_feature(dev, port, UHF_C_PORT_CONNECTION);
usbd_clear_port_feature(dev, port, UHF_C_PORT_ENABLE);
/*
* If there is already a device on the port the change status
* must mean that is has disconnected. Looking at the
* current connect status is not enough to figure this out
* since a new unit may have been connected before we handle
* the disconnect.
*/
disco:
if (up->device != NULL) {
/* Disconnected */
DPRINTF(("uhub_explore: device addr=%d disappeared "
"on port %d\n", up->device->address, port));
usb_disconnect_port(up, USBDEV(sc->sc_dev));
usbd_clear_port_feature(dev, port,
UHF_C_PORT_CONNECTION);
}
if (!(status & UPS_CURRENT_CONNECT_STATUS)) {
DPRINTFN(3,("uhub_explore: port=%d !CURRENT_CONNECT"
"_STATUS\n", port));
continue;
}
/* Connected */
up->restartcnt = 0;
/* Wait for maximum device power up time. */
usbd_delay_ms(dev, USB_PORT_POWERUP_DELAY);
/* Reset port, which implies enabling it. */
if (usbd_reset_port(dev, port, &up->status)) {
DPRINTF(("uhub_explore: port=%d reset failed\n",
port));
continue;
}
/* Get device info and set its address. */
err = usbd_new_device(USBDEV(sc->sc_dev), dev->bus,
dev->depth + 1, status & UPS_LOW_SPEED,
port, up);
/* XXX retry a few times? */
if (err) {
DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
"error=%s\n", usbd_errstr(err)));
/* Avoid addressing problems by disabling. */
/* usbd_reset_port(dev, port, &up->status); */
/*
* The unit refused to accept a new address, or had
* some other serious problem. Since we cannot leave
* at 0 we have to disable the port instead.
*/
printf("%s: device problem, disabling port %d\n",
USBDEVNAME(sc->sc_dev), port);
usbd_clear_port_feature(dev, port, UHF_PORT_ENABLE);
/* Make sure we don't try to restart it infinitely. */
up->restartcnt = USBD_RESTART_MAX;
} else {
if (up->device->hub)
up->device->hub->explore(up->device);
}
}
return (USBD_NORMAL_COMPLETION);
}
#if defined(__NetBSD__) || defined(__OpenBSD__)
int
uhub_activate(self, act)
device_ptr_t self;
enum devact act;
{
struct uhub_softc *sc = (struct uhub_softc *)self;
usbd_device_handle devhub = sc->sc_hub;
usbd_device_handle dev;
int nports, port, i;
switch (act) {
case DVACT_ACTIVATE:
return (EOPNOTSUPP);
break;
case DVACT_DEACTIVATE:
nports = devhub->hub->hubdesc.bNbrPorts;
for(port = 0; port < nports; port++) {
dev = devhub->hub->ports[port].device;
if (dev != NULL) {
for (i = 0; dev->subdevs[i]; i++)
config_deactivate(dev->subdevs[i]);
}
}
break;
}
return (0);
}
#endif
/*
* Called from process context when the hub is gone.
* Detach all devices on active ports.
*/
USB_DETACH(uhub)
{
USB_DETACH_START(uhub, sc);
usbd_device_handle dev = sc->sc_hub;
struct usbd_port *rup;
int port, nports;
#if defined(__NetBSD__) || defined(__OpenBSD__)
DPRINTF(("uhub_detach: sc=%p flags=%d\n", sc, flags));
#elif defined(__FreeBSD__)
DPRINTF(("uhub_detach: sc=%port\n", sc));
#endif
if (dev->hub == NULL) /* Must be partially working */
return (0);
usbd_abort_pipe(sc->sc_ipipe);
usbd_close_pipe(sc->sc_ipipe);
nports = dev->hub->hubdesc.bNbrPorts;
for(port = 0; port < nports; port++) {
rup = &dev->hub->ports[port];
if (rup->device)
usb_disconnect_port(rup, self);
}
free(dev->hub, M_USBDEV);
dev->hub = NULL;
return (0);
}
#if defined(__FreeBSD__)
/* Called when a device has been detached from it */
static void
uhub_child_detached(self, child)
device_t self;
device_t child;
{
struct uhub_softc *sc = device_get_softc(self);
usbd_device_handle devhub = sc->sc_hub;
usbd_device_handle dev;
int nports;
int port;
int i;
if (!devhub->hub)
/* should never happen; children are only created after init */
panic("hub not fully initialised, but child deleted?");
nports = devhub->hub->hubdesc.bNbrPorts;
for (port = 0; port < nports; port++) {
dev = devhub->hub->ports[port].device;
if (dev && dev->subdevs) {
for (i = 0; dev->subdevs[i]; i++) {
if (dev->subdevs[i] == child) {
dev->subdevs[i] = NULL;
return;
}
}
}
}
}
#endif
/*
* Hub interrupt.
* This an indication that some port has changed status.
* Notify the bus event handler thread that we need
* to be explored again.
*/
void
uhub_intr(xfer, addr, status)
usbd_xfer_handle xfer;
usbd_private_handle addr;
usbd_status status;
{
struct uhub_softc *sc = addr;
DPRINTFN(5,("uhub_intr: sc=%p\n", sc));
if (status != USBD_NORMAL_COMPLETION)
usbd_clear_endpoint_stall_async(sc->sc_ipipe);
usb_needs_explore(sc->sc_hub->bus);
}
#if defined(__FreeBSD__)
DRIVER_MODULE(uhub, usb, uhubroot_driver, uhubroot_devclass, 0, 0);
DRIVER_MODULE(uhub, uhub, uhub_driver, uhub_devclass, usbd_driver_load, 0);
#endif
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