ufm.c

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    1 /*
    2  * Copyright (c) 2001 M. Warner Losh
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions, and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   18  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * This code is based on ugen.c and ulpt.c developed by Lennart Augustsson.
   27  * This code includes software developed by the NetBSD Foundation, Inc. and
   28  * its contributors.
   29  */
   30 
   31 /*
   32  * $FreeBSD: src/sys/dev/usb/ufm.c,v 1.16 2003/10/04 21:41:01 joe Exp $
   33  */
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.h>
   39 #include <sys/module.h>
   40 #include <sys/bus.h>
   41 #include <sys/fcntl.h>
   42 #include <sys/filio.h>
   43 #include <sys/conf.h>
   44 #include <sys/uio.h>
   45 #include <sys/tty.h>
   46 #include <sys/file.h>
   47 #include <sys/select.h>
   48 #include <sys/poll.h>
   49 #include <sys/sysctl.h>
   50 #include <sys/thread2.h>
   51 
   52 #include <bus/usb/usb.h>
   53 #include <bus/usb/usbdi.h>
   54 #include <bus/usb/usbdi_util.h>
   55 
   56 #include <bus/usb/dsbr100io.h>
   57 
   58 #ifdef USB_DEBUG
   59 #define DPRINTF(x)      if (ufmdebug) kprintf x
   60 #define DPRINTFN(n,x)   if (ufmdebug>(n)) kprintf x
   61 int     ufmdebug = 0;
   62 SYSCTL_NODE(_hw_usb, OID_AUTO, ufm, CTLFLAG_RW, 0, "USB ufm");
   63 SYSCTL_INT(_hw_usb_ufm, OID_AUTO, debug, CTLFLAG_RW,
   64            &ufmdebug, 0, "ufm debug level");
   65 #else
   66 #define DPRINTF(x)
   67 #define DPRINTFN(n,x)
   68 #endif
   69 
   70 d_open_t  ufmopen;
   71 d_close_t ufmclose;
   72 d_ioctl_t ufmioctl;
   73 
   74 static struct dev_ops ufm_ops = {
   75         { "ufm", 0, 0 },
   76         .d_open = ufmopen,
   77         .d_close = ufmclose,
   78         .d_ioctl = ufmioctl,
   79 };
   80 
   81 #define FM_CMD0         0x00
   82 #define FM_CMD_SET_FREQ 0x01
   83 #define FM_CMD2         0x02
   84 
   85 struct ufm_softc {
   86         device_t sc_dev;
   87         usbd_device_handle sc_udev;
   88         usbd_interface_handle sc_iface;
   89 
   90         int sc_opened;
   91         int sc_epaddr;
   92         int sc_freq;
   93 
   94         int sc_refcnt;
   95 };
   96 
   97 #define UFMUNIT(n) (minor(n))
   98 
   99 static device_probe_t ufm_match;
  100 static device_attach_t ufm_attach;
  101 static device_detach_t ufm_detach;
  102 
  103 static devclass_t ufm_devclass;
  104 
  105 static kobj_method_t ufm_methods[] = {
  106         DEVMETHOD(device_probe, ufm_match),
  107         DEVMETHOD(device_attach, ufm_attach),
  108         DEVMETHOD(device_detach, ufm_detach),
  109         DEVMETHOD_END
  110 };
  111 
  112 static driver_t ufm_driver = {
  113         "ufm",
  114         ufm_methods,
  115         sizeof(struct ufm_softc)
  116 };
  117 
  118 MODULE_DEPEND(ufm, usb, 1, 1, 1);
  119 
  120 static int
  121 ufm_match(device_t self)
  122 {
  123         struct usb_attach_arg *uaa = device_get_ivars(self);
  124         usb_device_descriptor_t *dd;
  125 
  126         DPRINTFN(10,("ufm_match\n"));
  127         if (!uaa->iface)
  128                 return UMATCH_NONE;
  129 
  130         dd = usbd_get_device_descriptor(uaa->device);
  131 
  132         if (dd &&
  133             ((UGETW(dd->idVendor) == 0x04b4 && UGETW(dd->idProduct) == 0x1002)))
  134                 return UMATCH_VENDOR_PRODUCT;
  135         else
  136                 return UMATCH_NONE;
  137 }
  138 
  139 static int
  140 ufm_attach(device_t self)
  141 {
  142         struct ufm_softc *sc = device_get_softc(self);
  143         struct usb_attach_arg *uaa = device_get_ivars(self);
  144         usb_endpoint_descriptor_t *edesc;
  145         usbd_interface_handle iface;
  146         u_int8_t epcount;
  147         usbd_status r;
  148         char * ermsg = "<none>";
  149 
  150         DPRINTFN(10,("ufm_attach: sc=%p\n", sc));
  151         sc->sc_dev = self;
  152         sc->sc_udev = uaa->device;
  153 
  154         if ((!uaa->device) || (!uaa->iface)) {
  155                 ermsg = "device or iface";
  156                 goto nobulk;
  157         }
  158         sc->sc_iface = iface = uaa->iface;
  159         sc->sc_opened = 0;
  160         sc->sc_refcnt = 0;
  161 
  162         r = usbd_endpoint_count(iface, &epcount);
  163         if (r != USBD_NORMAL_COMPLETION) {
  164                 ermsg = "endpoints";
  165                 goto nobulk;
  166         }
  167 
  168         edesc = usbd_interface2endpoint_descriptor(iface, 0);
  169         if (!edesc) {
  170                 ermsg = "interface endpoint";
  171                 goto nobulk;
  172         }
  173         sc->sc_epaddr = edesc->bEndpointAddress;
  174 
  175         /* XXX no error trapping, no storing of cdev_t */
  176         make_dev(&ufm_ops, device_get_unit(self),
  177                  UID_ROOT, GID_OPERATOR,
  178                  0644, "ufm%d", device_get_unit(self));
  179 
  180         DPRINTFN(10, ("ufm_attach: %p\n", sc->sc_udev));
  181 
  182         return 0;
  183 
  184  nobulk:
  185         kprintf("%s: could not find %s\n", device_get_nameunit(sc->sc_dev),ermsg);
  186         return ENXIO;
  187 }
  188 
  189 
  190 int
  191 ufmopen(struct dev_open_args *ap)
  192 {
  193         cdev_t dev = ap->a_head.a_dev;
  194         struct ufm_softc *sc;
  195 
  196         int unit = UFMUNIT(dev);
  197         sc = devclass_get_softc(ufm_devclass, unit);
  198         if (sc == NULL)
  199                 return (ENXIO);
  200 
  201         DPRINTFN(5, ("ufmopen: flag=%d, mode=%d, unit=%d\n",
  202                      ap->a_oflags, ap->a_devtype, unit));
  203 
  204         if (sc->sc_opened)
  205                 return (EBUSY);
  206 
  207         if ((ap->a_oflags & (FWRITE|FREAD)) != (FWRITE|FREAD))
  208                 return (EACCES);
  209 
  210         sc->sc_opened = 1;
  211         return (0);
  212 }
  213 
  214 int
  215 ufmclose(struct dev_close_args *ap)
  216 {
  217         cdev_t dev = ap->a_head.a_dev;
  218         struct ufm_softc *sc;
  219 
  220         int unit = UFMUNIT(dev);
  221         sc = devclass_get_softc(ufm_devclass, unit);
  222 
  223         DPRINTFN(5, ("ufmclose: flag=%d, mode=%d, unit=%d\n", 
  224                     ap->a_fflag, ap->a_devtype, unit));
  225         sc->sc_opened = 0;
  226         sc->sc_refcnt = 0;
  227         return 0;
  228 }
  229 
  230 static int
  231 ufm_do_req(struct ufm_softc *sc, u_int8_t reqtype, u_int8_t request,
  232     u_int16_t value, u_int16_t index, u_int8_t len, void *retbuf)
  233 {
  234         usb_device_request_t req;
  235         usbd_status err;
  236 
  237         crit_enter();
  238         req.bmRequestType = reqtype;
  239         req.bRequest = request;
  240         USETW(req.wValue, value);
  241         USETW(req.wIndex, index);
  242         USETW(req.wLength, len);
  243         err = usbd_do_request_flags(sc->sc_udev, &req, retbuf, 0, NULL,
  244             USBD_DEFAULT_TIMEOUT);
  245         crit_exit();
  246         if (err) {
  247                 kprintf("usbd_do_request_flags returned %#x\n", err);
  248                 return (EIO);
  249         }
  250         return (0);
  251 }
  252 
  253 static int
  254 ufm_set_freq(struct ufm_softc *sc, caddr_t addr)
  255 {
  256         int freq = *(int *)addr;
  257         u_int8_t ret;
  258 
  259         /*
  260          * Freq now is in Hz.  We need to convert it to the frequency
  261          * that the radio wants.  This frequency is 10.7MHz above
  262          * the actual frequency.  We then need to convert to
  263          * units of 12.5kHz.  We add one to the IFM to make rounding
  264          * easier.
  265          */
  266         sc->sc_freq = freq;
  267         freq = (freq + 10700001) / 12500;
  268         /* This appears to set the frequency */
  269         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD_SET_FREQ, freq >> 8,
  270             freq, 1, &ret) != 0)
  271                 return (EIO);
  272         /* Not sure what this does */
  273         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x96, 0xb7, 1,
  274             &ret) != 0)
  275                 return (EIO);
  276         return (0);
  277 }
  278 
  279 static int
  280 ufm_get_freq(struct ufm_softc *sc, caddr_t addr)
  281 {
  282         int *valp = (int *)addr;
  283         *valp = sc->sc_freq;
  284         return (0);
  285 }
  286 
  287 static int
  288 ufm_start(struct ufm_softc *sc, caddr_t addr)
  289 {
  290         u_int8_t ret;
  291 
  292         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0xc7,
  293             1, &ret))
  294                 return (EIO);
  295         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x01, 0x00,
  296             1, &ret))
  297                 return (EIO);
  298         if (ret & 0x1)
  299                 return (EIO);
  300         return (0);
  301 }
  302 
  303 static int
  304 ufm_stop(struct ufm_softc *sc, caddr_t addr)
  305 {
  306         u_int8_t ret;
  307 
  308         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x16, 0x1C,
  309             1, &ret))
  310                 return (EIO);
  311         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x00, 0x00,
  312             1, &ret))
  313                 return (EIO);
  314         return (0);
  315 }
  316 
  317 static int
  318 ufm_get_stat(struct ufm_softc *sc, caddr_t addr)
  319 {
  320         u_int8_t ret;
  321 
  322         /*
  323          * Note, there's a 240ms settle time before the status
  324          * will be valid, so tsleep that amount.  hz/4 is a good
  325          * approximation of that.  Since this is a short sleep
  326          * we don't try to catch any signals to keep things
  327          * simple.
  328          */
  329         tsleep(sc, 0, "ufmwait", hz/4);
  330         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0x24,
  331             1, &ret))
  332                 return (EIO);
  333         *(int *)addr = ret;
  334 
  335         return (0);
  336 }
  337 
  338 int
  339 ufmioctl(struct dev_ioctl_args *ap)
  340 {
  341         cdev_t dev = ap->a_head.a_dev;
  342         caddr_t addr = ap->a_data;
  343         struct ufm_softc *sc;
  344 
  345         int unit = UFMUNIT(dev);
  346         int error = 0;
  347 
  348         sc = devclass_get_softc(ufm_devclass, unit);
  349 
  350         switch (ap->a_cmd) {
  351         case FM_SET_FREQ:
  352                 error = ufm_set_freq(sc, addr);
  353                 break;
  354         case FM_GET_FREQ:
  355                 error = ufm_get_freq(sc, addr);
  356                 break;
  357         case FM_START:
  358                 error = ufm_start(sc, addr);
  359                 break;
  360         case FM_STOP:
  361                 error = ufm_stop(sc, addr);
  362                 break;
  363         case FM_GET_STAT:
  364                 error = ufm_get_stat(sc, addr);
  365                 break;
  366         default:
  367                 return ENOTTY;
  368                 break;
  369         }
  370         return error;
  371 }
  372 
  373 static int
  374 ufm_detach(device_t self)
  375 {
  376         DPRINTF(("%s: disconnected\n", device_get_nameunit(self)));
  377         return 0;
  378 }
  379 
  380 DRIVER_MODULE(ufm, uhub, ufm_driver, ufm_devclass, usbd_driver_load, NULL);
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FreeBSD/Linux Kernel Cross Reference sys/dev/usbmisc/ufm/ufm.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/usbmisc/ufm/ufm.c
