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freebsd-dev/sys/dev/usb/uhub.c

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/* $NetBSD: uhub.c,v 1.14 1999/01/08 11:58:25 augustss Exp $ */
/* FreeBSD $Id: uhub.c,v 1.5 1999/01/07 23:31:34 n_hibma Exp $ */
/*
* 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#if defined(__NetBSD__)
#include <sys/device.h>
#elif defined(__FreeBSD__)
#include <sys/module.h>
#include <sys/bus.h>
#endif
#include <sys/proc.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdivar.h>
#ifdef USB_DEBUG
#define DPRINTF(x) if (usbdebug) printf x
#define DPRINTFN(n,x) if (usbdebug>(n)) printf x
extern int usbdebug;
extern char *usbd_error_strs[];
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
struct uhub_softc {
bdevice 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;
};
usbd_status uhub_init_port __P((struct usbd_port *));
void uhub_disconnect __P((struct usbd_port *up));
usbd_status uhub_explore __P((usbd_device_handle hub));
void uhub_intr __P((usbd_request_handle, usbd_private_handle, usbd_status));
/*void uhub_disco __P((void *));*/
USB_DECLARE_DRIVER_NAME(usb, uhub);
/* FIXME what does FreeBSD need? */
#if defined(__NetBSD__)
struct cfattach uhub_uhub_ca = {
sizeof(struct uhub_softc), uhub_match, uhub_attach
};
#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 == 0 && 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 r;
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);
r = usbd_set_config_index(dev, 0, 1);
if (r != USBD_NORMAL_COMPLETION) {
DPRINTF(("%s: configuration failed, error=%d(%s)\n",
USBDEVNAME(sc->sc_dev), r, usbd_error_strs[r]));
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"));
r = usbd_do_request(dev, &req, &hubdesc);
nports = hubdesc.bNbrPorts;
if (r == USBD_NORMAL_COMPLETION && nports > 7) {
USETW(req.wLength, USB_HUB_DESCRIPTOR_SIZE + (nports+1) / 8);
r = usbd_do_request(dev, &req, &hubdesc);
}
if (r != USBD_NORMAL_COMPLETION) {
DPRINTF(("%s: getting hub descriptor failed, error=%d(%s)\n",
USBDEVNAME(sc->sc_dev), r, usbd_error_strs[r]));
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_USB, M_NOWAIT);
if (hub == 0)
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 &&
!dev->powersrc->parent->self_powered) {
printf("%s: bus powered hub connected to bus powered hub, "
"ignored\n",
USBDEVNAME(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
/* Set up interrupt pipe. */
r = usbd_device2interface_handle(dev, 0, &iface);
if (r != USBD_NORMAL_COMPLETION) {
printf("%s: no interface handle\n", USBDEVNAME(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
ed = usbd_interface2endpoint_descriptor(iface, 0);
if (ed == 0) {
printf("%s: no endpoint descriptor\n", USBDEVNAME(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
if ((ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
printf("%s: bad interrupt endpoint\n", USBDEVNAME(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
r = usbd_open_pipe_intr(iface, ed->bEndpointAddress,USBD_SHORT_XFER_OK,
&sc->sc_ipipe, sc, sc->sc_status,
sizeof(sc->sc_status),
uhub_intr);
if (r != USBD_NORMAL_COMPLETION) {
printf("%s: cannot open interrupt pipe\n",
USBDEVNAME(sc->sc_dev));
USB_ATTACH_ERROR_RETURN;
}
/* 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;
r = uhub_init_port(up);
if (r != USBD_NORMAL_COMPLETION)
printf("%s: init of port %d failed\n",
USBDEVNAME(sc->sc_dev), up->portno);
}
sc->sc_running = 1;
USB_ATTACH_SUCCESS_RETURN;
}
#if defined(__FreeBSD__)
static int
uhub_detach(device_t self)
{
struct uhub_softc *sc = device_get_softc(self);
int nports = sc->sc_hub->hub->hubdesc.bNbrPorts;
int p;
for (p = 0; p < nports; p++) {
struct usbd_port *up = &sc->sc_hub->hub->ports[p];
if (up->device)
uhub_disconnect(up);
}
free(sc->sc_hub->hub, M_USB);
return 0;
}
#endif
usbd_status
uhub_init_port(up)
struct usbd_port *up;
{
int port = up->portno;
usbd_device_handle dev = up->parent;
usbd_status r;
u_int16_t pstatus;
r = usbd_get_port_status(dev, port, &up->status);
if (r != USBD_NORMAL_COMPLETION)
return (r);
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);
/* then turn the power on. */
r = usbd_set_port_feature(dev, port, UHF_PORT_POWER);
if (r != USBD_NORMAL_COMPLETION)
return (r);
r = usbd_get_port_status(dev, port, &up->status);
if (r != USBD_NORMAL_COMPLETION)
return (r);
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);
}
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 r;
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];
r = usbd_get_port_status(dev, port, &up->status);
if (r != USBD_NORMAL_COMPLETION) {
DPRINTF(("uhub_explore: get port status failed, "
"error=%d(%s)\n",
r, usbd_error_strs[r]));
continue;
}
status = UGETW(up->status.wPortStatus);
change = UGETW(up->status.wPortChange);
DPRINTFN(5, ("uhub_explore: port %d status 0x%04x 0x%04x\n",
port, status, change));
if (change & UPS_C_PORT_ENABLED) {
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)) {
/* 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) {
/* Disconnected */
DPRINTF(("uhub_explore: device %d disappeared "
"on port %d\n",
up->device->address, port));
uhub_disconnect(up);
usbd_clear_port_feature(dev, port,
UHF_C_PORT_CONNECTION);
}
if (!(status & UPS_CURRENT_CONNECT_STATUS))
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) !=
USBD_NORMAL_COMPLETION)
continue;
/* Get device info and set its address. */
r = usbd_new_device(&sc->sc_dev, dev->bus,
dev->depth + 1, status & UPS_LOW_SPEED,
port, up);
/* XXX retry a few times? */
if (r != USBD_NORMAL_COMPLETION) {
DPRINTFN(-1,("uhub_explore: usb_new_device failed, "
"error=%d(%s)\n", r, usbd_error_strs[r]));
/* Avoid addressing problems by disabling. */
/* usbd_reset_port(dev, port, &up->status); */
/* XXX
* What should we do. The device may or may not be at its
* assigned address. In any case we'd like to ignore it.
* Maybe the port should be disabled until the device is
* disconnected.
*/
if (r == USBD_SET_ADDR_FAILED || 1) {/* XXX */
/* The unit refused to accept a new
* address, and 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. */
up->restartcnt = USBD_RESTART_MAX;
}
} else {
if (up->device->hub)
up->device->hub->explore(up->device);
}
}
return (USBD_NORMAL_COMPLETION);
}
void
uhub_disconnect(up)
struct usbd_port *up;
{
usbd_device_handle dev = up->device;
usbd_pipe_handle p, n;
int i;
struct softc { bdevice sc_dev; }; /* all softc begin like this */
DPRINTFN(3,("uhub_disconnect: up=%p dev=%p port=%d\n",
up, dev, up->portno));
printf("%s: at %s port %d (addr %d) disconnected\n",
USBDEVNAME(((struct softc *)dev->softc)->sc_dev),
USBDEVNAME(((struct uhub_softc *)up->parent->softc)->sc_dev),
up->portno, dev->address);
if (!dev->cdesc) {
/* Partially attached device, just drop it. */
dev->bus->devices[dev->address] = 0;
up->device = 0;
return;
}
for (i = 0; i < dev->cdesc->bNumInterface; i++) {
for (p = LIST_FIRST(&dev->ifaces[i].pipes); p; p = n) {
n = LIST_NEXT(p, next);
if (p->disco)
p->disco(p->discoarg);
usbd_abort_pipe(p);
usbd_close_pipe(p);
}
}
/* XXX Free all data structures and disable further I/O. */
if (dev->hub) {
struct usbd_port *rup;
int p, nports;
DPRINTFN(3,("usb_disconnect: hub, recursing\n"));
nports = dev->hub->hubdesc.bNbrPorts;
for(p = 0; p < nports; p++) {
rup = &dev->hub->ports[p];
if (rup->device)
uhub_disconnect(rup);
}
}
dev->bus->devices[dev->address] = 0;
up->device = 0;
/* XXX free */
#if defined(__FreeBSD__)
device_delete_child(
device_get_parent(((struct softc *)dev->softc)->sc_dev),
((struct softc *)dev->softc)->sc_dev);
#endif
}
void
uhub_intr(reqh, addr, status)
usbd_request_handle reqh;
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);
else
usb_needs_explore(sc->sc_hub->bus);
}
#if defined(__FreeBSD__)
DRIVER_MODULE(uhub, usb, uhub_driver, uhub_devclass, usbd_driver_load, 0);
#endif
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