402 lines
9.3 KiB
C
402 lines
9.3 KiB
C
/* $NetBSD: usb.c,v 1.3 1998/08/01 18:16:20 augustss Exp $ */
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/*
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Author: Lennart Augustsson <augustss@carlstedt.se>
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* Carlstedt Research & Technology
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* USB spec: http://www.teleport.com/cgi-bin/mailmerge.cgi/~usb/cgiform.tpl
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* More USB specs at http://www.usb.org/developers/index.shtml
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*/
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#include "opt_usbverbose.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <sys/poll.h>
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#include <sys/proc.h>
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#include <sys/select.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdivar.h>
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#include <dev/usb/usb_quirks.h>
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#ifdef USB_DEBUG
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#define DPRINTF(x) if (usbdebug) printf x
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#define DPRINTFN(n,x) if (usbdebug>(n)) printf x
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int usbdebug = 0;
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int uhcidebug;
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int ohcidebug;
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#else
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#define DPRINTF(x)
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#define DPRINTFN(n,x)
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#endif
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#define USBUNIT(dev) (minor(dev))
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struct usb_softc {
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struct device sc_dev; /* base device */
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usbd_bus_handle sc_bus; /* USB controller */
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struct usbd_port sc_port; /* dummy port for root hub */
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char sc_running;
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char sc_exploring;
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struct selinfo sc_consel; /* waiting for connect change */
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};
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int usb_match __P((struct device *, struct cfdata *, void *));
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void usb_attach __P((struct device *, struct device *, void *));
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int usbopen __P((dev_t, int, int, struct proc *));
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int usbclose __P((dev_t, int, int, struct proc *));
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int usbioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
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int usbpoll __P((dev_t, int, struct proc *));
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usbd_status usb_discover __P((struct usb_softc *));
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extern struct cfdriver usb_cd;
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struct cfattach usb_ca = {
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sizeof(struct usb_softc), usb_match, usb_attach
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};
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int
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usb_match(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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DPRINTF(("usbd_match\n"));
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return (1);
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}
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void
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usb_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct usb_softc *sc = (struct usb_softc *)self;
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usbd_device_handle dev;
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usbd_status r;
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DPRINTF(("usbd_attach\n"));
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sc->sc_bus = aux;
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sc->sc_bus->usbctl = sc;
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printf("\n");
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sc->sc_running = 1;
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sc->sc_bus->use_polling = 1;
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sc->sc_port.power = USB_MAX_POWER;
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r = usbd_new_device(&sc->sc_dev, sc->sc_bus, 0, 0, 0, &sc->sc_port);
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if (r == USBD_NORMAL_COMPLETION) {
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dev = sc->sc_port.device;
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if (!dev->hub) {
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sc->sc_running = 0;
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printf("%s: root device is not a hub\n",
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sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_bus->root_hub = dev;
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dev->hub->explore(&sc->sc_dev, sc->sc_bus->root_hub);
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} else {
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printf("%s: root hub problem, error=%d\n",
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sc->sc_dev.dv_xname, r);
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sc->sc_running = 0;
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}
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sc->sc_bus->use_polling = 0;
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}
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int
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usbctlprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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/* only "usb"es can attach to host controllers */
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if (pnp)
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printf("usb at %s", pnp);
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return (UNCONF);
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}
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int
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usbopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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int unit = USBUNIT(dev);
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struct usb_softc *sc;
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if (unit >= usb_cd.cd_ndevs)
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return (ENXIO);
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sc = usb_cd.cd_devs[unit];
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if (sc == 0 || !sc->sc_running)
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return (ENXIO);
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return (0);
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}
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int
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usbclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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return (0);
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}
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int
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usbioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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int unit = USBUNIT(dev);
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struct usb_softc *sc = usb_cd.cd_devs[unit];
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if (sc == 0 || !sc->sc_running)
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return (ENXIO);
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switch (cmd) {
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#ifdef USB_DEBUG
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case USB_SETDEBUG:
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usbdebug = uhcidebug = ohcidebug = *(int *)data;
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break;
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#endif
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case USB_DISCOVER:
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usb_discover(sc);
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break;
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case USB_REQUEST:
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{
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struct usb_ctl_request *ur = (void *)data;
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int len = UGETW(ur->request.wLength);
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struct iovec iov;
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struct uio uio;
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void *ptr = 0;
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int addr = ur->addr;
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usbd_status r;
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int error = 0;
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if (len < 0 || len > 32768)
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return EINVAL;
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if (addr < 0 || addr >= USB_MAX_DEVICES ||
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sc->sc_bus->devices[addr] == 0)
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return EINVAL;
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if (len != 0) {
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iov.iov_base = (caddr_t)ur->data;
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iov.iov_len = len;
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uio.uio_iov = &iov;
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uio.uio_iovcnt = 1;
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uio.uio_resid = len;
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uio.uio_offset = 0;
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uio.uio_segflg = UIO_USERSPACE;
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uio.uio_rw =
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ur->request.bmRequestType & UT_READ ?
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UIO_READ : UIO_WRITE;
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uio.uio_procp = p;
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ptr = malloc(len, M_TEMP, M_WAITOK);
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if (uio.uio_rw == UIO_WRITE) {
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error = uiomove(ptr, len, &uio);
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if (error)
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goto ret;
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}
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}
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r = usbd_do_request(sc->sc_bus->devices[addr],
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&ur->request, ptr);
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if (r) {
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error = EIO;
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goto ret;
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}
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if (len != 0) {
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if (uio.uio_rw == UIO_READ) {
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error = uiomove(ptr, len, &uio);
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if (error)
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goto ret;
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}
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}
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ret:
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if (ptr)
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free(ptr, M_TEMP);
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return (error);
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break;
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}
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case USB_DEVICEINFO:
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{
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struct usb_device_info *di = (void *)data;
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int addr = di->addr;
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usbd_device_handle dev;
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struct usbd_port *p;
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int i, r, s;
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if (addr < 1 || addr >= USB_MAX_DEVICES)
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return (EINVAL);
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dev = sc->sc_bus->devices[addr];
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if (dev == 0)
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return (ENXIO);
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di->config = dev->config;
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usbd_devinfo_vp(dev, di->product, di->vendor);
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usbd_printBCD(di->revision, UGETW(dev->ddesc.bcdDevice));
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di->class = dev->ddesc.bDeviceClass;
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di->power = dev->self_powered ? 0 : dev->power;
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di->lowspeed = dev->lowspeed;
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if (dev->hub) {
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for (i = 0;
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i < sizeof(di->ports) / sizeof(di->ports[0]) &&
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i < dev->hub->hubdesc.bNbrPorts;
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i++) {
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p = &dev->hub->ports[i];
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if (p->device)
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r = p->device->address;
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else {
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s = UGETW(p->status.wPortStatus);
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if (s & UPS_PORT_ENABLED)
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r = USB_PORT_ENABLED;
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else if (s & UPS_SUSPEND)
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r = USB_PORT_SUSPENDED;
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else if (s & UPS_PORT_POWER)
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r = USB_PORT_POWERED;
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else
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r = USB_PORT_DISABLED;
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}
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di->ports[i] = r;
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}
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di->nports = dev->hub->hubdesc.bNbrPorts;
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} else
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di->nports = 0;
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break;
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}
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case USB_DEVICESTATS:
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*(struct usb_device_stats *)data = sc->sc_bus->stats;
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break;
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default:
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return (ENXIO);
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}
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return (0);
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}
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int
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usbpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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int unit = USBUNIT(dev);
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struct usb_softc *sc = usb_cd.cd_devs[unit];
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int revents, s;
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DPRINTFN(2, ("usbpoll: sc=%p events=0x%x\n", sc, events));
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s = splusb();
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revents = 0;
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if (events & (POLLOUT | POLLWRNORM))
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if (sc->sc_bus->needs_explore)
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revents |= events & (POLLOUT | POLLWRNORM);
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DPRINTFN(2, ("usbpoll: revents=0x%x\n", revents));
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if (revents == 0) {
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if (events & (POLLOUT | POLLWRNORM)) {
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DPRINTFN(2, ("usbpoll: selrecord\n"));
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selrecord(p, &sc->sc_consel);
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}
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}
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splx(s);
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return (revents);
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}
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int
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usb_bus_count()
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{
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int i, n;
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for (i = n = 0; i < usb_cd.cd_ndevs; i++)
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if (usb_cd.cd_devs[i])
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n++;
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return (n);
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}
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usbd_status
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usb_get_bus_handle(n, h)
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int n;
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usbd_bus_handle *h;
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{
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int i;
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for (i = 0; i < usb_cd.cd_ndevs; i++)
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if (usb_cd.cd_devs[i] && n-- == 0) {
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*h = usb_cd.cd_devs[i];
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return (USBD_NORMAL_COMPLETION);
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}
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return (USBD_INVAL);
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}
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usbd_status
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usb_discover(sc)
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struct usb_softc *sc;
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{
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int s;
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/* Explore device tree from the root */
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/* We need mutual exclusion while traversing the device tree. */
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s = splusb();
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while (sc->sc_exploring)
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tsleep(&sc->sc_exploring, PRIBIO, "usbdis", 0);
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sc->sc_exploring = 1;
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sc->sc_bus->needs_explore = 0;
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splx(s);
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sc->sc_bus->root_hub->hub->explore(&sc->sc_dev, sc->sc_bus->root_hub);
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s = splusb();
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sc->sc_exploring = 0;
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wakeup(&sc->sc_exploring);
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splx(s);
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/* XXX should we start over if sc_needsexplore is set again? */
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return (0);
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}
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void
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usb_needs_explore(bus)
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usbd_bus_handle bus;
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{
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bus->needs_explore = 1;
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selwakeup(&bus->usbctl->sc_consel);
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}
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