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 1.19 2007/07/02 23:52:05 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/vnode.h>
  51 #include <sys/poll.h>
  52 #include <sys/sysctl.h>
  53 #include <sys/thread2.h>
  54
  55 #include <bus/usb/usb.h>
  56 #include <bus/usb/usbdi.h>
  57 #include <bus/usb/usbdi_util.h>
  58
  59 #include <bus/usb/usbdevs.h>
  60 #include <bus/usb/dsbr100io.h>
  61
  62 #ifdef USB_DEBUG
  63 #define DPRINTF(x)      if (ufmdebug) kprintf x
  64 #define DPRINTFN(n,x)   if (ufmdebug>(n)) kprintf x
  65 int     ufmdebug = 0;
  66 SYSCTL_NODE(_hw_usb, OID_AUTO, ufm, CTLFLAG_RW, 0, "USB ufm");
  67 SYSCTL_INT(_hw_usb_ufm, OID_AUTO, debug, CTLFLAG_RW,
  68            &ufmdebug, 0, "ufm debug level");
  69 #else
  70 #define DPRINTF(x)
  71 #define DPRINTFN(n,x)
  72 #endif
  73
  74 d_open_t  ufmopen;
  75 d_close_t ufmclose;
  76 d_ioctl_t ufmioctl;
  77
  78 #define UFM_CDEV_MAJOR  200
  79
  80 static struct dev_ops ufm_ops = {
  81         { "ufm", UFM_CDEV_MAJOR, 0 },
  82         .d_open = ufmopen,
  83         .d_close = ufmclose,
  84         .d_ioctl = ufmioctl,
  85 };
  86
  87 #define FM_CMD0         0x00
  88 #define FM_CMD_SET_FREQ 0x01
  89 #define FM_CMD2         0x02
  90
  91 struct ufm_softc {
  92         device_t sc_dev;
  93         usbd_device_handle sc_udev;
  94         usbd_interface_handle sc_iface;
  95
  96         int sc_opened;
  97         int sc_epaddr;
  98         int sc_freq;
  99
 100         int sc_refcnt;
 101 };
 102
 103 #define UFMUNIT(n) (minor(n))
 104
 105 static device_probe_t ufm_match;
 106 static device_attach_t ufm_attach;
 107 static device_detach_t ufm_detach;
 108
 109 static devclass_t ufm_devclass;
 110
 111 static kobj_method_t ufm_methods[] = {
 112         DEVMETHOD(device_probe, ufm_match),
 113         DEVMETHOD(device_attach, ufm_attach),
 114         DEVMETHOD(device_detach, ufm_detach),
 115         {0,0}
 116 };
 117
 118 static driver_t ufm_driver = {
 119         "ufm",
 120         ufm_methods,
 121         sizeof(struct ufm_softc)
 122 };
 123
 124 MODULE_DEPEND(ufm, usb, 1, 1, 1);
 125
 126 static int
 127 ufm_match(device_t self)
 128 {
 129         struct usb_attach_arg *uaa = device_get_ivars(self);
 130         usb_device_descriptor_t *dd;
 131
 132         DPRINTFN(10,("ufm_match\n"));
 133         if (!uaa->iface)
 134                 return UMATCH_NONE;
 135
 136         dd = usbd_get_device_descriptor(uaa->device);
 137
 138         if (dd &&
 139             ((UGETW(dd->idVendor) == USB_VENDOR_CYPRESS &&
 140             UGETW(dd->idProduct) == USB_PRODUCT_CYPRESS_FMRADIO)))
 141                 return UMATCH_VENDOR_PRODUCT;
 142         else
 143                 return UMATCH_NONE;
 144 }
 145
 146 static int
 147 ufm_attach(device_t self)
 148 {
 149         struct ufm_softc *sc = device_get_softc(self);
 150         struct usb_attach_arg *uaa = device_get_ivars(self);
 151         char devinfo[1024];
 152         usb_endpoint_descriptor_t *edesc;
 153         usbd_device_handle udev;
 154         usbd_interface_handle iface;
 155         u_int8_t epcount;
 156         usbd_status r;
 157         char * ermsg = "<none>";
 158
 159         DPRINTFN(10,("ufm_attach: sc=%p\n", sc));
 160         usbd_devinfo(uaa->device, 0, devinfo);
 161         sc->sc_dev = self;
 162         device_set_desc_copy(self, devinfo);
 163         kprintf("%s: %s\n", device_get_nameunit(sc->sc_dev), devinfo);
 164
 165         sc->sc_udev = udev = uaa->device;
 166
 167         if ((!uaa->device) || (!uaa->iface)) {
 168                 ermsg = "device or iface";
 169                 goto nobulk;
 170         }
 171         sc->sc_iface = iface = uaa->iface;
 172         sc->sc_opened = 0;
 173         sc->sc_refcnt = 0;
 174
 175         r = usbd_endpoint_count(iface, &epcount);
 176         if (r != USBD_NORMAL_COMPLETION) {
 177                 ermsg = "endpoints";
 178                 goto nobulk;
 179         }
 180
 181         edesc = usbd_interface2endpoint_descriptor(iface, 0);
 182         if (!edesc) {
 183                 ermsg = "interface endpoint";
 184                 goto nobulk;
 185         }
 186         sc->sc_epaddr = edesc->bEndpointAddress;
 187
 188         /* XXX no error trapping, no storing of cdev_t */
 189         dev_ops_add(&ufm_ops, -1, device_get_unit(self));
 190         make_dev(&ufm_ops, device_get_unit(self),
 191                         UID_ROOT, GID_OPERATOR,
 192                         0644, "ufm%d", device_get_unit(self));
 193
 194         DPRINTFN(10, ("ufm_attach: %p\n", sc->sc_udev));
 195
 196         return 0;
 197
 198  nobulk:
 199         kprintf("%s: could not find %s\n", device_get_nameunit(sc->sc_dev),ermsg);
 200         return ENXIO;
 201 }
 202
 203
 204 int
 205 ufmopen(struct dev_open_args *ap)
 206 {
 207         cdev_t dev = ap->a_head.a_dev;
 208         struct ufm_softc *sc;
 209
 210         int unit = UFMUNIT(dev);
 211         sc = devclass_get_softc(ufm_devclass, unit);
 212         if (sc == NULL)
 213                 return (ENXIO);
 214
 215         DPRINTFN(5, ("ufmopen: flag=%d, mode=%d, unit=%d\n",
 216                      ap->a_oflags, ap->a_devtype, unit));
 217
 218         if (sc->sc_opened)
 219                 return (EBUSY);
 220
 221         if ((ap->a_oflags & (FWRITE|FREAD)) != (FWRITE|FREAD))
 222                 return (EACCES);
 223
 224         sc->sc_opened = 1;
 225         return (0);
 226 }
 227
 228 int
 229 ufmclose(struct dev_close_args *ap)
 230 {
 231         cdev_t dev = ap->a_head.a_dev;
 232         struct ufm_softc *sc;
 233
 234         int unit = UFMUNIT(dev);
 235         sc = devclass_get_softc(ufm_devclass, unit);
 236
 237         DPRINTFN(5, ("ufmclose: flag=%d, mode=%d, unit=%d\n",
 238                     ap->a_fflag, ap->a_devtype, unit));
 239         sc->sc_opened = 0;
 240         sc->sc_refcnt = 0;
 241         return 0;
 242 }
 243
 244 static int
 245 ufm_do_req(struct ufm_softc *sc, u_int8_t reqtype, u_int8_t request,
 246     u_int16_t value, u_int16_t index, u_int8_t len, void *retbuf)
 247 {
 248         usb_device_request_t req;
 249         usbd_status err;
 250
 251         crit_enter();
 252         req.bmRequestType = reqtype;
 253         req.bRequest = request;
 254         USETW(req.wValue, value);
 255         USETW(req.wIndex, index);
 256         USETW(req.wLength, len);
 257         err = usbd_do_request_flags(sc->sc_udev, &req, retbuf, 0, NULL,
 258             USBD_DEFAULT_TIMEOUT);
 259         crit_exit();
 260         if (err) {
 261                 kprintf("usbd_do_request_flags returned %#x\n", err);
 262                 return (EIO);
 263         }
 264         return (0);
 265 }
 266
 267 static int
 268 ufm_set_freq(struct ufm_softc *sc, caddr_t addr)
 269 {
 270         int freq = *(int *)addr;
 271         u_int8_t ret;
 272
 273         /*
 274          * Freq now is in Hz.  We need to convert it to the frequency
 275          * that the radio wants.  This frequency is 10.7MHz above
 276          * the actual frequency.  We then need to convert to
 277          * units of 12.5kHz.  We add one to the IFM to make rounding
 278          * easier.
 279          */
 280         sc->sc_freq = freq;
 281         freq = (freq + 10700001) / 12500;
 282         /* This appears to set the frequency */
 283         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD_SET_FREQ, freq >> 8,
 284             freq, 1, &ret) != 0)
 285                 return (EIO);
 286         /* Not sure what this does */
 287         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x96, 0xb7, 1,
 288             &ret) != 0)
 289                 return (EIO);
 290         return (0);
 291 }
 292
 293 static int
 294 ufm_get_freq(struct ufm_softc *sc, caddr_t addr)
 295 {
 296         int *valp = (int *)addr;
 297         *valp = sc->sc_freq;
 298         return (0);
 299 }
 300
 301 static int
 302 ufm_start(struct ufm_softc *sc, caddr_t addr)
 303 {
 304         u_int8_t ret;
 305
 306         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0xc7,
 307             1, &ret))
 308                 return (EIO);
 309         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x01, 0x00,
 310             1, &ret))
 311                 return (EIO);
 312         if (ret & 0x1)
 313                 return (EIO);
 314         return (0);
 315 }
 316
 317 static int
 318 ufm_stop(struct ufm_softc *sc, caddr_t addr)
 319 {
 320         u_int8_t ret;
 321
 322         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x16, 0x1C,
 323             1, &ret))
 324                 return (EIO);
 325         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x00, 0x00,
 326             1, &ret))
 327                 return (EIO);
 328         return (0);
 329 }
 330
 331 static int
 332 ufm_get_stat(struct ufm_softc *sc, caddr_t addr)
 333 {
 334         u_int8_t ret;
 335
 336         /*
 337          * Note, there's a 240ms settle time before the status
 338          * will be valid, so tsleep that amount.  hz/4 is a good
 339          * approximation of that.  Since this is a short sleep
 340          * we don't try to catch any signals to keep things
 341          * simple.
 342          */
 343         tsleep(sc, 0, "ufmwait", hz/4);
 344         if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0x24,
 345             1, &ret))
 346                 return (EIO);
 347         *(int *)addr = ret;
 348
 349         return (0);
 350 }
 351
 352 int
 353 ufmioctl(struct dev_ioctl_args *ap)
 354 {
 355         cdev_t dev = ap->a_head.a_dev;
 356         caddr_t addr = ap->a_data;
 357         struct ufm_softc *sc;
 358
 359         int unit = UFMUNIT(dev);
 360         int error = 0;
 361
 362         sc = devclass_get_softc(ufm_devclass, unit);
 363
 364         switch (ap->a_cmd) {
 365         case FM_SET_FREQ:
 366                 error = ufm_set_freq(sc, addr);
 367                 break;
 368         case FM_GET_FREQ:
 369                 error = ufm_get_freq(sc, addr);
 370                 break;
 371         case FM_START:
 372                 error = ufm_start(sc, addr);
 373                 break;
 374         case FM_STOP:
 375                 error = ufm_stop(sc, addr);
 376                 break;
 377         case FM_GET_STAT:
 378                 error = ufm_get_stat(sc, addr);
 379                 break;
 380         default:
 381                 return ENOTTY;
 382                 break;
 383         }
 384         return error;
 385 }
 386
 387 static int
 388 ufm_detach(device_t self)
 389 {
 390         DPRINTF(("%s: disconnected\n", device_get_nameunit(self)));
 391         return 0;
 392 }
 393
 394 DRIVER_MODULE(ufm, uhub, ufm_driver, ufm_devclass, usbd_driver_load, 0);