519 lines
13 KiB
C
519 lines
13 KiB
C
/* $NetBSD: uhid.c,v 1.4 1998/08/20 19:55:07 veego 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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#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/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/select.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/device.h>
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#include <sys/poll.h>
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#include <dev/usb/usb.h>
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#include <dev/usb/usbhid.h>
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#include <dev/usb/usbdi.h>
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#include <dev/usb/usbdi_util.h>
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#include <dev/usb/hid.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 (uhiddebug) printf x
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#define DPRINTFN(n,x) if (uhiddebug>(n)) printf x
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int uhiddebug = 0;
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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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struct uhid_softc {
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struct device sc_dev; /* base device */
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usbd_interface_handle sc_iface; /* interface */
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usbd_pipe_handle sc_intrpipe; /* interrupt pipe */
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int sc_ep_addr;
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int sc_isize;
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int sc_osize;
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int sc_fsize;
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u_int8_t sc_iid;
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u_int8_t sc_oid;
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u_int8_t sc_fid;
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char *sc_ibuf;
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char *sc_obuf;
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void *sc_repdesc;
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int sc_repdesc_size;
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struct clist sc_q;
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struct selinfo sc_rsel;
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u_char sc_state; /* driver state */
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#define UHID_OPEN 0x01 /* device is open */
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#define UHID_ASLP 0x02 /* waiting for mouse data */
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#define UHID_NEEDCLEAR 0x04 /* needs clearing endpoint stall */
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#define UHID_IMMED 0x08 /* return read data immediately */
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int sc_disconnected; /* device is gone */
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};
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#define UHIDUNIT(dev) (minor(dev))
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#define UHID_CHUNK 128 /* chunk size for read */
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#define UHID_BSIZE 1020 /* buffer size */
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int uhid_match __P((struct device *, struct cfdata *, void *));
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void uhid_attach __P((struct device *, struct device *, void *));
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int uhidopen __P((dev_t, int, int, struct proc *));
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int uhidclose __P((dev_t, int, int, struct proc *p));
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int uhidread __P((dev_t, struct uio *uio, int));
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int uhidwrite __P((dev_t, struct uio *uio, int));
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int uhidioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
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int uhidpoll __P((dev_t, int, struct proc *));
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void uhid_intr __P((usbd_request_handle, usbd_private_handle, usbd_status));
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void uhid_disco __P((void *));
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extern struct cfdriver uhid_cd;
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struct cfattach uhid_ca = {
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sizeof(struct uhid_softc), uhid_match, uhid_attach
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};
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int
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uhid_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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struct usb_attach_arg *uaa = aux;
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usb_interface_descriptor_t *id;
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if (!uaa->iface)
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return (UMATCH_NONE);
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id = usbd_get_interface_descriptor(uaa->iface);
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if (!id || id->bInterfaceClass != UCLASS_HID)
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return (UMATCH_NONE);
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return (UMATCH_IFACECLASS_GENERIC);
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}
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void
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uhid_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 uhid_softc *sc = (struct uhid_softc *)self;
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struct usb_attach_arg *uaa = aux;
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usbd_interface_handle iface = uaa->iface;
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usb_interface_descriptor_t *id;
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usb_endpoint_descriptor_t *ed;
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int size;
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void *desc;
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usbd_status r;
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char devinfo[1024];
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sc->sc_disconnected = 1;
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sc->sc_iface = iface;
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id = usbd_get_interface_descriptor(iface);
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usbd_devinfo(uaa->device, 0, devinfo);
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printf(": %s (interface class %d/%d)\n", devinfo,
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id->bInterfaceClass, id->bInterfaceSubClass);
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ed = usbd_interface2endpoint_descriptor(iface, 0);
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if (!ed) {
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printf("%s: could not read endpoint descriptor\n",
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sc->sc_dev.dv_xname);
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return;
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}
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DPRINTFN(10,("uhid_attach: \
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bLength=%d bDescriptorType=%d bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d bInterval=%d\n",
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ed->bLength, ed->bDescriptorType, ed->bEndpointAddress & UE_ADDR,
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ed->bEndpointAddress & UE_IN ? "in" : "out",
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ed->bmAttributes & UE_XFERTYPE,
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UGETW(ed->wMaxPacketSize), ed->bInterval));
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if ((ed->bEndpointAddress & UE_IN) != UE_IN ||
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(ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) {
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printf("%s: unexpected endpoint\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_ep_addr = ed->bEndpointAddress;
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sc->sc_disconnected = 0;
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r = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_USB);
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if (r != USBD_NORMAL_COMPLETION) {
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printf("%s: no report descriptor\n", sc->sc_dev.dv_xname);
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return;
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}
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(void)usbd_set_idle(iface, 0, 0);
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sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid);
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sc->sc_osize = hid_report_size(desc, size, hid_output, &sc->sc_oid);
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sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid);
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sc->sc_repdesc = desc;
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sc->sc_repdesc_size = size;
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}
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void
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uhid_disco(p)
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void *p;
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{
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struct uhid_softc *sc = p;
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DPRINTF(("ums_hid: sc=%p\n", sc));
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usbd_abort_pipe(sc->sc_intrpipe);
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sc->sc_disconnected = 1;
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}
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void
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uhid_intr(reqh, addr, status)
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usbd_request_handle reqh;
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usbd_private_handle addr;
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usbd_status status;
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{
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struct uhid_softc *sc = addr;
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DPRINTFN(5, ("uhid_intr: status=%d\n", status));
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DPRINTFN(5, ("uhid_intr: data = %02x %02x %02x\n",
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sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2]));
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if (status == USBD_CANCELLED)
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return;
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if (status != USBD_NORMAL_COMPLETION) {
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DPRINTF(("uhid_intr: status=%d\n", status));
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sc->sc_state |= UHID_NEEDCLEAR;
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return;
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}
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(void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q);
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if (sc->sc_state & UHID_ASLP) {
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sc->sc_state &= ~UHID_ASLP;
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DPRINTFN(5, ("uhid_intr: waking %p\n", sc));
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wakeup((caddr_t)sc);
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}
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selwakeup(&sc->sc_rsel);
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}
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int
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uhidopen(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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int unit = UHIDUNIT(dev);
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struct uhid_softc *sc;
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usbd_status r;
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if (unit >= uhid_cd.cd_ndevs)
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return ENXIO;
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sc = uhid_cd.cd_devs[unit];
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if (!sc)
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return ENXIO;
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DPRINTF(("uhidopen: sc=%p, disco=%d\n", sc, sc->sc_disconnected));
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if (sc->sc_disconnected)
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return (EIO);
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if (sc->sc_state & UHID_OPEN)
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return EBUSY;
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if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1)
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return ENOMEM;
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sc->sc_state |= UHID_OPEN;
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sc->sc_state &= ~UHID_IMMED;
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sc->sc_ibuf = malloc(sc->sc_isize, M_USB, M_WAITOK);
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sc->sc_obuf = malloc(sc->sc_osize, M_USB, M_WAITOK);
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/* Set up interrupt pipe. */
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r = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
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USBD_SHORT_XFER_OK,
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&sc->sc_intrpipe, sc, sc->sc_ibuf,
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sc->sc_isize, uhid_intr);
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if (r != USBD_NORMAL_COMPLETION) {
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DPRINTF(("uhidopen: usbd_open_pipe_intr failed, error=%d\n",r));
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sc->sc_state &= ~UHID_OPEN;
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return (EIO);
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}
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usbd_set_disco(sc->sc_intrpipe, uhid_disco, sc);
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return 0;
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}
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int
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uhidclose(dev, flag, mode, p)
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dev_t dev;
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int flag;
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int mode;
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struct proc *p;
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{
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struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)];
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if (sc->sc_disconnected)
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return (EIO);
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DPRINTF(("uhidclose: sc=%p\n", sc));
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/* Disable interrupts. */
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usbd_abort_pipe(sc->sc_intrpipe);
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usbd_close_pipe(sc->sc_intrpipe);
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sc->sc_state &= ~UHID_OPEN;
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clfree(&sc->sc_q);
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free(sc->sc_ibuf, M_USB);
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free(sc->sc_obuf, M_USB);
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return 0;
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}
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int
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uhidread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)];
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int s;
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int error = 0;
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size_t length;
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u_char buffer[UHID_CHUNK];
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usbd_status r;
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if (sc->sc_disconnected)
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return (EIO);
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DPRINTFN(1, ("uhidread\n"));
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if (sc->sc_state & UHID_IMMED) {
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DPRINTFN(1, ("uhidread immed\n"));
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r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT,
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sc->sc_iid, sc->sc_ibuf, sc->sc_isize);
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if (r != USBD_NORMAL_COMPLETION)
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return (EIO);
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return (uiomove(buffer, sc->sc_isize, uio));
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}
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s = spltty();
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while (sc->sc_q.c_cc == 0) {
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if (flag & IO_NDELAY) {
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splx(s);
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return EWOULDBLOCK;
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}
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sc->sc_state |= UHID_ASLP;
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DPRINTFN(5, ("uhidread: sleep on %p\n", sc));
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error = tsleep((caddr_t)sc, PZERO | PCATCH, "uhidrea", 0);
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DPRINTFN(5, ("uhidread: woke, error=%d\n", error));
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if (error) {
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sc->sc_state &= ~UHID_ASLP;
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splx(s);
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return (error);
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}
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if (sc->sc_state & UHID_NEEDCLEAR) {
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DPRINTFN(-1,("uhidread: clearing stall\n"));
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sc->sc_state &= ~UHID_NEEDCLEAR;
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usbd_clear_endpoint_stall(sc->sc_intrpipe);
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}
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}
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splx(s);
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/* Transfer as many chunks as possible. */
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while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) {
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length = min(sc->sc_q.c_cc, uio->uio_resid);
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if (length > sizeof(buffer))
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length = sizeof(buffer);
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/* Remove a small chunk from the input queue. */
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(void) q_to_b(&sc->sc_q, buffer, length);
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DPRINTFN(5, ("uhidread: got %d chars\n", length));
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/* Copy the data to the user process. */
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if ((error = uiomove(buffer, length, uio)) != 0)
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break;
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}
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return (error);
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}
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int
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uhidwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)];
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int error;
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int size;
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usbd_status r;
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if (sc->sc_disconnected)
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return (EIO);
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DPRINTFN(1, ("uhidwrite\n"));
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size = sc->sc_osize;
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error = 0;
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while (uio->uio_resid > 0) {
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if (uio->uio_resid != size)
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return (0);
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if ((error = uiomove(sc->sc_obuf, size, uio)) != 0)
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break;
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if (sc->sc_oid)
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r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
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sc->sc_obuf[0],
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sc->sc_obuf+1, size-1);
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else
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r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT,
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0, sc->sc_obuf, size);
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if (r != USBD_NORMAL_COMPLETION) {
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error = EIO;
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break;
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}
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}
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return (error);
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}
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int
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uhidioctl(dev, cmd, addr, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t addr;
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int flag;
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struct proc *p;
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{
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struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)];
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struct usb_ctl_report_desc *rd;
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struct usb_ctl_report *re;
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int size, id;
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usbd_status r;
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if (sc->sc_disconnected)
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return (EIO);
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DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd));
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switch (cmd) {
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case FIONBIO:
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/* All handled in the upper FS layer. */
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break;
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case USB_GET_REPORT_DESC:
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rd = (struct usb_ctl_report_desc *)addr;
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size = min(sc->sc_repdesc_size, sizeof rd->data);
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rd->size = size;
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memcpy(rd->data, sc->sc_repdesc, size);
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break;
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case USB_SET_IMMED:
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if (*(int *)addr)
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sc->sc_state |= UHID_IMMED;
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else
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sc->sc_state &= ~UHID_IMMED;
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break;
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case USB_GET_REPORT:
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re = (struct usb_ctl_report *)addr;
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switch (re->report) {
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case UHID_INPUT_REPORT:
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size = sc->sc_isize;
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id = sc->sc_iid;
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break;
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case UHID_OUTPUT_REPORT:
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size = sc->sc_osize;
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id = sc->sc_oid;
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break;
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case UHID_FEATURE_REPORT:
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size = sc->sc_fsize;
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id = sc->sc_fid;
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break;
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default:
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return (EINVAL);
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}
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r = usbd_get_report(sc->sc_iface, re->report, id,
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re->data, size);
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if (r != USBD_NORMAL_COMPLETION)
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return (EIO);
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break;
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default:
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return (EINVAL);
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}
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return (0);
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}
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int
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uhidpoll(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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struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)];
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int revents = 0;
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int s;
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if (sc->sc_disconnected)
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|
return (EIO);
|
|
|
|
s = spltty();
|
|
if (events & (POLLOUT | POLLWRNORM))
|
|
revents |= events & (POLLOUT | POLLWRNORM);
|
|
if (events & (POLLIN | POLLRDNORM)) {
|
|
if (sc->sc_q.c_cc > 0)
|
|
revents |= events & (POLLIN | POLLRDNORM);
|
|
else
|
|
selrecord(p, &sc->sc_rsel);
|
|
}
|
|
|
|
splx(s);
|
|
return (revents);
|
|
}
|