sys/bus/u4b/misc/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 #include <sys/stdint.h>
  32 #include <sys/param.h>
  33 #include <sys/queue.h>
  34 #include <sys/types.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/bus.h>
  38 #include <sys/module.h>
  39 #include <sys/lock.h>
  40 #include <sys/condvar.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/unistd.h>
  43 #include <sys/callout.h>
  44 #include <sys/malloc.h>
  45 #include <sys/priv.h>
  46 #include <sys/conf.h>
  47 #include <sys/fcntl.h>
  48
  49 #include <bus/u4b/usb.h>
  50 #include <bus/u4b/usbdi.h>
  51 #include "usbdevs.h"
  52
  53 #define USB_DEBUG_VAR usb_debug
  54 #include <bus/u4b/usb_debug.h>
  55
  56 #include <bus/u4b/ufm_ioctl.h>
  57
  58 #define UFM_CMD0                0x00
  59 #define UFM_CMD_SET_FREQ        0x01
  60 #define UFM_CMD2                0x02
  61
  62 struct ufm_softc {
  63         struct usb_fifo_sc sc_fifo;
  64         struct lock sc_lock;
  65
  66         struct usb_device *sc_udev;
  67
  68         uint32_t sc_unit;
  69         uint32_t sc_freq;
  70
  71         uint8_t sc_name[16];
  72 };
  73
  74 /* prototypes */
  75
  76 static device_probe_t ufm_probe;
  77 static device_attach_t ufm_attach;
  78 static device_detach_t ufm_detach;
  79
  80 static usb_fifo_ioctl_t ufm_ioctl;
  81
  82 static struct usb_fifo_methods ufm_fifo_methods = {
  83         .f_ioctl = &ufm_ioctl,
  84         .basename[0] = "ufm",
  85 };
  86
  87 static int      ufm_do_req(struct ufm_softc *, uint8_t, uint16_t, uint16_t,
  88                     uint8_t *);
  89 static int      ufm_set_freq(struct ufm_softc *, void *);
  90 static int      ufm_get_freq(struct ufm_softc *, void *);
  91 static int      ufm_start(struct ufm_softc *, void *);
  92 static int      ufm_stop(struct ufm_softc *, void *);
  93 static int      ufm_get_stat(struct ufm_softc *, void *);
  94
  95 static devclass_t ufm_devclass;
  96
  97 static device_method_t ufm_methods[] = {
  98         DEVMETHOD(device_probe, ufm_probe),
  99         DEVMETHOD(device_attach, ufm_attach),
 100         DEVMETHOD(device_detach, ufm_detach),
 101         DEVMETHOD_END
 102 };
 103
 104 static driver_t ufm_driver = {
 105         .name = "ufm",
 106         .methods = ufm_methods,
 107         .size = sizeof(struct ufm_softc),
 108 };
 109
 110 DRIVER_MODULE(ufm, uhub, ufm_driver, ufm_devclass, NULL, NULL);
 111 MODULE_DEPEND(ufm, usb, 1, 1, 1);
 112 MODULE_VERSION(ufm, 1);
 113
 114 static const STRUCT_USB_HOST_ID ufm_devs[] = {
 115         {USB_VPI(USB_VENDOR_CYPRESS, USB_PRODUCT_CYPRESS_FMRADIO, 0)},
 116 };
 117
 118 static int
 119 ufm_probe(device_t dev)
 120 {
 121         struct usb_attach_arg *uaa = device_get_ivars(dev);
 122
 123         if (uaa->usb_mode != USB_MODE_HOST)
 124                 return (ENXIO);
 125         if (uaa->info.bConfigIndex != 0)
 126                 return (ENXIO);
 127         if (uaa->info.bIfaceIndex != 0)
 128                 return (ENXIO);
 129
 130         return (usbd_lookup_id_by_uaa(ufm_devs, sizeof(ufm_devs), uaa));
 131 }
 132
 133 static int
 134 ufm_attach(device_t dev)
 135 {
 136         struct usb_attach_arg *uaa = device_get_ivars(dev);
 137         struct ufm_softc *sc = device_get_softc(dev);
 138         int error;
 139
 140         sc->sc_udev = uaa->device;
 141         sc->sc_unit = device_get_unit(dev);
 142
 143         ksnprintf(sc->sc_name, sizeof(sc->sc_name), "%s",
 144             device_get_nameunit(dev));
 145
 146         lockinit(&sc->sc_lock, "ufm lock", 0, LK_CANRECURSE);
 147
 148         device_set_usb_desc(dev);
 149
 150         error = usb_fifo_attach(uaa->device, sc, &sc->sc_lock,
 151             &ufm_fifo_methods, &sc->sc_fifo,
 152             device_get_unit(dev), 0 - 1, uaa->info.bIfaceIndex,
 153             UID_ROOT, GID_OPERATOR, 0644);
 154         if (error) {
 155                 goto detach;
 156         }
 157         return (0);                     /* success */
 158
 159 detach:
 160         ufm_detach(dev);
 161         return (ENXIO);
 162 }
 163
 164 static int
 165 ufm_detach(device_t dev)
 166 {
 167         struct ufm_softc *sc = device_get_softc(dev);
 168
 169         usb_fifo_detach(&sc->sc_fifo);
 170
 171         lockuninit(&sc->sc_lock);
 172
 173         return (0);
 174 }
 175
 176 static int
 177 ufm_do_req(struct ufm_softc *sc, uint8_t request,
 178     uint16_t value, uint16_t index, uint8_t *retbuf)
 179 {
 180         int error;
 181
 182         struct usb_device_request req;
 183         uint8_t buf[1];
 184
 185         req.bmRequestType = UT_READ_VENDOR_DEVICE;
 186         req.bRequest = request;
 187         USETW(req.wValue, value);
 188         USETW(req.wIndex, index);
 189         USETW(req.wLength, 1);
 190
 191         error = usbd_do_request(sc->sc_udev, NULL, &req, buf);
 192
 193         if (retbuf) {
 194                 *retbuf = buf[0];
 195         }
 196         if (error) {
 197                 return (ENXIO);
 198         }
 199         return (0);
 200 }
 201
 202 static int
 203 ufm_set_freq(struct ufm_softc *sc, void *addr)
 204 {
 205         int freq = *(int *)addr;
 206
 207         /*
 208          * Freq now is in Hz.  We need to convert it to the frequency
 209          * that the radio wants.  This frequency is 10.7MHz above
 210          * the actual frequency.  We then need to convert to
 211          * units of 12.5kHz.  We add one to the IFM to make rounding
 212          * easier.
 213          */
 214         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 215         sc->sc_freq = freq;
 216         lockmgr(&sc->sc_lock, LK_RELEASE);
 217
 218         freq = (freq + 10700001) / 12500;
 219
 220         /* This appears to set the frequency */
 221         if (ufm_do_req(sc, UFM_CMD_SET_FREQ,
 222             freq >> 8, freq, NULL) != 0) {
 223                 return (EIO);
 224         }
 225         /* Not sure what this does */
 226         if (ufm_do_req(sc, UFM_CMD0,
 227             0x96, 0xb7, NULL) != 0) {
 228                 return (EIO);
 229         }
 230         return (0);
 231 }
 232
 233 static int
 234 ufm_get_freq(struct ufm_softc *sc, void *addr)
 235 {
 236         int *valp = (int *)addr;
 237
 238         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 239         *valp = sc->sc_freq;
 240         lockmgr(&sc->sc_lock, LK_RELEASE);
 241         return (0);
 242 }
 243
 244 static int
 245 ufm_start(struct ufm_softc *sc, void *addr)
 246 {
 247         uint8_t ret;
 248
 249         if (ufm_do_req(sc, UFM_CMD0,
 250             0x00, 0xc7, &ret)) {
 251                 return (EIO);
 252         }
 253         if (ufm_do_req(sc, UFM_CMD2,
 254             0x01, 0x00, &ret)) {
 255                 return (EIO);
 256         }
 257         if (ret & 0x1) {
 258                 return (EIO);
 259         }
 260         return (0);
 261 }
 262
 263 static int
 264 ufm_stop(struct ufm_softc *sc, void *addr)
 265 {
 266         if (ufm_do_req(sc, UFM_CMD0,
 267             0x16, 0x1C, NULL)) {
 268                 return (EIO);
 269         }
 270         if (ufm_do_req(sc, UFM_CMD2,
 271             0x00, 0x00, NULL)) {
 272                 return (EIO);
 273         }
 274         return (0);
 275 }
 276
 277 static int
 278 ufm_get_stat(struct ufm_softc *sc, void *addr)
 279 {
 280         uint8_t ret;
 281
 282         /*
 283          * Note, there's a 240ms settle time before the status
 284          * will be valid, so sleep that amount.
 285          */
 286         usb_pause_mtx(NULL, hz / 4);
 287
 288         if (ufm_do_req(sc, UFM_CMD0,
 289             0x00, 0x24, &ret)) {
 290                 return (EIO);
 291         }
 292         *(int *)addr = ret;
 293
 294         return (0);
 295 }
 296
 297 static int
 298 ufm_ioctl(struct usb_fifo *fifo, u_long cmd, void *addr,
 299     int fflags)
 300 {
 301         struct ufm_softc *sc = usb_fifo_softc(fifo);
 302         int error = 0;
 303
 304         if ((fflags & (FWRITE | FREAD)) != (FWRITE | FREAD)) {
 305                 return (EACCES);
 306         }
 307
 308         switch (cmd) {
 309         case FM_SET_FREQ:
 310                 error = ufm_set_freq(sc, addr);
 311                 break;
 312         case FM_GET_FREQ:
 313                 error = ufm_get_freq(sc, addr);
 314                 break;
 315         case FM_START:
 316                 error = ufm_start(sc, addr);
 317                 break;
 318         case FM_STOP:
 319                 error = ufm_stop(sc, addr);
 320                 break;
 321         case FM_GET_STAT:
 322                 error = ufm_get_stat(sc, addr);
 323                 break;
 324         default:
 325                 error = ENOTTY;
 326                 break;
 327         }
 328         return (error);
 329 }