sys/dev/usbmisc/ufm/ufm.c

   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  * $DragonFly: src/sys/dev/usbmisc/ufm/ufm.c,v 1.20 2007/08/07 10:42:40 hasso Exp $
  34  */
  35
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <sys/module.h>
  41 #include <sys/bus.h>
  42 #include <sys/ioccom.h>
  43 #include <sys/fcntl.h>
  44 #include <sys/filio.h>
  45 #include <sys/conf.h>
  46 #include <sys/uio.h>
  47 #include <sys/tty.h>
  48 #include <sys/file.h>
  49 #include <sys/select.h>
  50 #include <sys/poll.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/thread2.h>
  53
  54 #include <bus/usb/usb.h>
  55 #include <bus/usb/usbdi.h>
  56 #include <bus/usb/usbdi_util.h>
  57
  58 #include <bus/usb/usbdevs.h>
  59 #include <bus/usb/dsbr100io.h>
  60
  61 #ifdef USB_DEBUG
  62 #define DPRINTF(x)      if (ufmdebug) kprintf x
  63 #define DPRINTFN(n,x)   if (ufmdebug>(n)) kprintf x
  64 int     ufmdebug = 0;
  65 SYSCTL_NODE(_hw_usb, OID_AUTO, ufm, CTLFLAG_RW, 0, "USB ufm");
  66 SYSCTL_INT(_hw_usb_ufm, OID_AUTO, debug, CTLFLAG_RW,
  67            &ufmdebug, 0, "ufm debug level");
  68 #else
  69 #define DPRINTF(x)
  70 #define DPRINTFN(n,x)
  71 #endif
  72
  73 d_open_t  ufmopen;
  74 d_close_t ufmclose;
  75 d_ioctl_t ufmioctl;
  76
  77 #define UFM_CDEV_MAJOR  200
  78
  79 static struct dev_ops ufm_ops = {
  80         { "ufm", UFM_CDEV_MAJOR, 0 },
  81         .d_open = ufmopen,
  82         .d_close = ufmclose,
  83         .d_ioctl = ufmioctl,
  84 };
  85
  86 #define FM_CMD0         0x00
  87 #define FM_CMD_SET_FREQ 0x01
  88 #define FM_CMD2         0x02
  89
  90 struct ufm_softc {
  91         device_t sc_dev;
  92         usbd_device_handle sc_udev;
  93         usbd_interface_handle sc_iface;
  94
  95         int sc_opened;
  96         int sc_epaddr;
  97         int sc_freq;
  98
  99         int sc_refcnt;
 100 };
 101
 102 #define UFMUNIT(n) (minor(n))
 103
 104 static device_probe_t ufm_match;
 105 static device_attach_t ufm_attach;
 106 static device_detach_t ufm_detach;
 107
 108 static devclass_t ufm_devclass;
 109
 110 static kobj_method_t ufm_methods[] = {
 111         DEVMETHOD(device_probe, ufm_match),
 112         DEVMETHOD(device_attach, ufm_attach),
 113         DEVMETHOD(device_detach, ufm_detach),
 114         {0,0}
 115 };
 116
 117 static driver_t ufm_driver = {
 118         "ufm",
 119         ufm_methods,
 120         sizeof(struct ufm_softc)
 121 };
 122
 123 MODULE_DEPEND(ufm, usb, 1, 1, 1);
 124
 125 static int
 126 ufm_match(device_t self)
 127 {
 128         struct usb_attach_arg *uaa = device_get_ivars(self);
 129         usb_device_descriptor_t *dd;
 130
 131         DPRINTFN(10,("ufm_match\n"));
 132         if (!uaa->iface)
 133                 return UMATCH_NONE;
 134
 135         dd = usbd_get_device_descriptor(uaa->device);
 136
 137         if (dd &&
 138             ((UGETW(dd->idVendor) == USB_VENDOR_CYPRESS &&
 139             UGETW(dd->idProduct) == USB_PRODUCT_CYPRESS_FMRADIO)))
 140                 return UMATCH_VENDOR_PRODUCT;
 141         else
 142                 return UMATCH_NONE;
 143 }
 144
 145 static int
 146 ufm_attach(device_t self)
 147 {
 148         struct ufm_softc *sc = device_get_softc(self);
 149         struct usb_attach_arg *uaa = device_get_ivars(self);
 150         char devinfo[1024];
 151         usb_endpoint_descriptor_t *edesc;
 152         usbd_device_handle udev;
 153         usbd_interface_handle iface;
 154         u_int8_t epcount;
 155         usbd_status r;
 156         char * ermsg = "<none>";
 157
 158         DPRINTFN(10,("ufm_attach: sc=%p\n", sc));
 159         usbd_devinfo(uaa->device, 0, devinfo);
 160         sc->sc_dev = self;
 161         device_set_desc_copy(self, devinfo);
 162         kprintf("%s: %s\n", device_get_nameunit(sc->sc_dev), devinfo);
 163
 164         sc->sc_udev = udev = uaa->device;
 165
 166         if ((!uaa->device) || (!uaa->iface)) {
 167                 ermsg = "device or iface";
 168                 goto nobulk;
 169         }
 170         sc->sc_iface = iface = uaa->iface;
 171         sc->sc_opened = 0;
 172         sc->sc_refcnt = 0;
 173
 174         r = usbd_endpoint_count(iface, &epcount);
 175         if (r != USBD_NORMAL_COMPLETION) {
 176                 ermsg = "endpoints";
 177                 goto nobulk;
 178         }
 179
 180         edesc = usbd_interface2endpoint_descriptor(iface, 0);
 181         if (!edesc) {
 182                 ermsg = "interface endpoint";
 183                 goto nobulk;
 184         }
 185         sc->sc_epaddr = edesc->bEndpointAddress;
 186
 187         /* XXX no error trapping, no storing of cdev_t */
 188         dev_ops_add(&ufm_ops, -1, device_get_unit(self));
 189         make_dev(&ufm_ops, device_get_unit(self),
 190                         UID_ROOT, GID_OPERATOR,
 191                         0644, "ufm%d", device_get_unit(self));
 192
 193         DPRINTFN(10, ("ufm_attach: %p\n", sc->sc_udev));
 194
 195         return 0;
 196
 197  nobulk:
 198         kprintf("%s: could not find %s\n", device_get_nameunit(sc->sc_dev),ermsg);
 199         return ENXIO;
 200 }
 201
 202
 203 int
 204 ufmopen(struct dev_open_args *ap)
 205 {
 206         cdev_t dev = ap->a_head.a_dev;
 207         struct ufm_softc *sc;
 208
 209         int unit = UFMUNIT(dev);
 210         sc = devclass_get_softc(ufm_devclass, unit);
 211         if (sc == NULL)
 212                 return (ENXIO);
 213
 214         DPRINTFN(5, ("ufmopen: flag=%d, mode=%d, unit=%d\n",
 215                      ap->a_oflags, ap->a_devtype, unit));
 216
 217         if (sc->sc_opened)
 218                 return (EBUSY);
 219
 220         if ((ap->a_oflags & (FWRITE|FREAD)) != (FWRITE|FREAD))
 221                 return (EACCES);
 222
 223         sc->sc_opened = 1;
 224         return (0);
 225 }
 226
 227 int
 228 ufmclose(struct dev_close_args *ap)
 229 {
 230         cdev_t dev = ap->a_head.a_dev;
 231         struct ufm_softc *sc;
 232
 233         int unit = UFMUNIT(dev);
 234         sc = devclass_get_softc(ufm_devclass, unit);
 235
 236         DPRINTFN(5, ("ufmclose: flag=%d, mode=%d, unit=%d\n",
 237                     ap->a_fflag, ap->a_devtype, unit));
 238         sc->sc_opened = 0;
 239         sc->sc_refcnt = 0;
 240         return 0;
 241 }
 242
 243 static int
 244 ufm_do_req(struct ufm_softc *sc, u_int8_t reqtype, u_int8_t request,
 245     u_int16_t value, u_int16_t index, u_int8_t len, void *retbuf)
 246 {
 247         usb_device_request_t req;
 248         usbd_status err;
 249
 250         crit_enter();
 251         req.bmRequestType = reqtype;
 252         req.bRequest = request;
 253         USETW(req.wValue, value);
 254         USETW(req.wIndex, index);
 255         USETW(req.wLength, len);
 256         err = usbd_do_request_flags(sc->sc_udev, &req, retbuf, 0, NULL,
 257             USBD_DEFAULT_TIMEOUT);
 258         crit_exit();
 259         if (err) {
 260                 kprintf("usbd_do_request_flags returned %#x\n", err);
 261                 return (EIO);
 262         }
 263         return (0);
 264 }
 265
 266 static int
 267 ufm_set_freq(struct ufm_softc *sc, caddr_t addr)
 268 {
 269         int freq = *(int *)addr;
 270         u_int8_t ret;
 271
 272         /*
 273          * Freq now is in Hz.  We need to convert it to the frequency
 274          * that the radio wants.  This frequency is 10.7MHz above
 275          * the actual frequency.  We then need to convert to
 276          * units of 12.5kHz.  We add one to the IFM to make rounding
 277          * easier.
 278          */
 279         sc->sc_freq = freq;
 280         freq = (freq + 10700001) / 12500;
 281         /* This appears to set the frequency */
 282         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD_SET_FREQ, freq >> 8,
 283             freq, 1, &ret) != 0)
 284                 return (EIO);
 285         /* Not sure what this does */
 286         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x96, 0xb7, 1,
 287             &ret) != 0)
 288                 return (EIO);
 289         return (0);
 290 }
 291
 292 static int
 293 ufm_get_freq(struct ufm_softc *sc, caddr_t addr)
 294 {
 295         int *valp = (int *)addr;
 296         *valp = sc->sc_freq;
 297         return (0);
 298 }
 299
 300 static int
 301 ufm_start(struct ufm_softc *sc, caddr_t addr)
 302 {
 303         u_int8_t ret;
 304
 305         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0xc7,
 306             1, &ret))
 307                 return (EIO);
 308         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x01, 0x00,
 309             1, &ret))
 310                 return (EIO);
 311         if (ret & 0x1)
 312                 return (EIO);
 313         return (0);
 314 }
 315
 316 static int
 317 ufm_stop(struct ufm_softc *sc, caddr_t addr)
 318 {
 319         u_int8_t ret;
 320
 321         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x16, 0x1C,
 322             1, &ret))
 323                 return (EIO);
 324         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x00, 0x00,
 325             1, &ret))
 326                 return (EIO);
 327         return (0);
 328 }
 329
 330 static int
 331 ufm_get_stat(struct ufm_softc *sc, caddr_t addr)
 332 {
 333         u_int8_t ret;
 334
 335         /*
 336          * Note, there's a 240ms settle time before the status
 337          * will be valid, so tsleep that amount.  hz/4 is a good
 338          * approximation of that.  Since this is a short sleep
 339          * we don't try to catch any signals to keep things
 340          * simple.
 341          */
 342         tsleep(sc, 0, "ufmwait", hz/4);
 343         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0x24,
 344             1, &ret))
 345                 return (EIO);
 346         *(int *)addr = ret;
 347
 348         return (0);
 349 }
 350
 351 int
 352 ufmioctl(struct dev_ioctl_args *ap)
 353 {
 354         cdev_t dev = ap->a_head.a_dev;
 355         caddr_t addr = ap->a_data;
 356         struct ufm_softc *sc;
 357
 358         int unit = UFMUNIT(dev);
 359         int error = 0;
 360
 361         sc = devclass_get_softc(ufm_devclass, unit);
 362
 363         switch (ap->a_cmd) {
 364         case FM_SET_FREQ:
 365                 error = ufm_set_freq(sc, addr);
 366                 break;
 367         case FM_GET_FREQ:
 368                 error = ufm_get_freq(sc, addr);
 369                 break;
 370         case FM_START:
 371                 error = ufm_start(sc, addr);
 372                 break;
 373         case FM_STOP:
 374                 error = ufm_stop(sc, addr);
 375                 break;
 376         case FM_GET_STAT:
 377                 error = ufm_get_stat(sc, addr);
 378                 break;
 379         default:
 380                 return ENOTTY;
 381                 break;
 382         }
 383         return error;
 384 }
 385
 386 static int
 387 ufm_detach(device_t self)
 388 {
 389         DPRINTF(("%s: disconnected\n", device_get_nameunit(self)));
 390         return 0;
 391 }
 392
 393 DRIVER_MODULE(ufm, uhub, ufm_driver, ufm_devclass, usbd_driver_load, 0);