sys/dev/netif/rum/if_rum.c

   1 /*      $OpenBSD: if_rum.c,v 1.40 2006/09/18 16:20:20 damien Exp $      */
   2 /*      $DragonFly: src/sys/dev/netif/rum/if_rum.c,v 1.6 2007/02/07 12:34:26 sephe Exp $        */
   3
   4 /*-
   5  * Copyright (c) 2005, 2006 Damien Bergamini <damien.bergamini@free.fr>
   6  * Copyright (c) 2006 Niall O'Higgins <niallo@openbsd.org>
   7  *
   8  * Permission to use, copy, modify, and distribute this software for any
   9  * purpose with or without fee is hereby granted, provided that the above
  10  * copyright notice and this permission notice appear in all copies.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19  */
  20
  21 /*-
  22  * Ralink Technology RT2501USB/RT2601USB chipset driver
  23  * http://www.ralinktech.com/
  24  */
  25
  26 #include <sys/param.h>
  27 #include <sys/bus.h>
  28 #include <sys/endian.h>
  29 #include <sys/kernel.h>
  30 #include <sys/malloc.h>
  31 #include <sys/mbuf.h>
  32 #include <sys/rman.h>
  33 #include <sys/serialize.h>
  34 #include <sys/socket.h>
  35 #include <sys/sockio.h>
  36
  37 #include <net/bpf.h>
  38 #include <net/ethernet.h>
  39 #include <net/if.h>
  40 #include <net/if_arp.h>
  41 #include <net/if_dl.h>
  42 #include <net/if_media.h>
  43 #include <net/ifq_var.h>
  44
  45 #include <netproto/802_11/ieee80211_var.h>
  46 #include <netproto/802_11/ieee80211_radiotap.h>
  47 #include <netproto/802_11/wlan_ratectl/onoe/ieee80211_onoe_param.h>
  48
  49 #include <bus/usb/usb.h>
  50 #include <bus/usb/usbdi.h>
  51 #include <bus/usb/usbdi_util.h>
  52 #include <bus/usb/usbdevs.h>
  53
  54 #include "if_rumreg.h"
  55 #include "if_rumvar.h"
  56 #include "rum_ucode.h"
  57
  58 #ifdef USB_DEBUG
  59 #define RUM_DEBUG
  60 #endif
  61
  62 #ifdef RUM_DEBUG
  63 #define DPRINTF(x)      do { if (rum_debug) logprintf x; } while (0)
  64 #define DPRINTFN(n, x)  do { if (rum_debug >= (n)) logprintf x; } while (0)
  65 int rum_debug = 0;
  66 #else
  67 #define DPRINTF(x)
  68 #define DPRINTFN(n, x)
  69 #endif
  70
  71 /* various supported device vendors/products */
  72 static const struct usb_devno rum_devs[] = {
  73         { USB_VENDOR_ABOCOM,            USB_PRODUCT_ABOCOM_RT2573 },
  74         { USB_VENDOR_ASUS,              USB_PRODUCT_ASUS_WL167G_2 },
  75         { USB_VENDOR_BELKIN,            USB_PRODUCT_BELKIN_F5D7050A },
  76         { USB_VENDOR_BELKIN,            USB_PRODUCT_BELKIN_F5D9050V3 },
  77         { USB_VENDOR_LINKSYS4,          USB_PRODUCT_LINKSYS4_WUSB54GC },
  78         { USB_VENDOR_CONCEPTRONIC,      USB_PRODUCT_CONCEPTRONIC_C54RU2 },
  79         { USB_VENDOR_DICKSMITH,         USB_PRODUCT_DICKSMITH_CWD854F },
  80         { USB_VENDOR_DICKSMITH,         USB_PRODUCT_DICKSMITH_RT2573 },
  81         { USB_VENDOR_DLINK2,            USB_PRODUCT_DLINK2_DWLG122C1 },
  82         { USB_VENDOR_DLINK2,            USB_PRODUCT_DLINK2_WUA1340 },
  83         { USB_VENDOR_GIGABYTE,          USB_PRODUCT_GIGABYTE_GNWB01GS },
  84         { USB_VENDOR_GIGASET,           USB_PRODUCT_GIGASET_RT2573 },
  85         { USB_VENDOR_GOODWAY,           USB_PRODUCT_GOODWAY_RT2573 },
  86         { USB_VENDOR_HUAWEI3COM,        USB_PRODUCT_HUAWEI3COM_RT2573 },
  87         { USB_VENDOR_MSI,               USB_PRODUCT_MSI_RT2573 },
  88         { USB_VENDOR_MSI,               USB_PRODUCT_MSI_RT2573_2 },
  89         { USB_VENDOR_MSI,               USB_PRODUCT_MSI_RT2573_3 },
  90         { USB_VENDOR_PLANEX2,           USB_PRODUCT_PLANEX2_GWUSMM },
  91         { USB_VENDOR_QCOM,              USB_PRODUCT_QCOM_RT2573 },
  92         { USB_VENDOR_QCOM,              USB_PRODUCT_QCOM_RT2573_2 },
  93         { USB_VENDOR_RALINK,            USB_PRODUCT_RALINK_RT2573 },
  94         { USB_VENDOR_RALINK,            USB_PRODUCT_RALINK_RT2671 },
  95         { USB_VENDOR_SITECOMEU,         USB_PRODUCT_SITECOMEU_WL113R2 },
  96         { USB_VENDOR_SITECOMEU,         USB_PRODUCT_SITECOMEU_WL172 },
  97         { USB_VENDOR_SURECOM,           USB_PRODUCT_SURECOM_RT2573 }
  98 };
  99
 100 #ifdef notyet
 101 Static void             rum_attachhook(void *);
 102 #endif
 103 Static int              rum_alloc_tx_list(struct rum_softc *);
 104 Static void             rum_free_tx_list(struct rum_softc *);
 105 Static int              rum_alloc_rx_list(struct rum_softc *);
 106 Static void             rum_free_rx_list(struct rum_softc *);
 107 Static int              rum_media_change(struct ifnet *);
 108 Static void             rum_next_scan(void *);
 109 Static void             rum_task(void *);
 110 Static int              rum_newstate(struct ieee80211com *,
 111                             enum ieee80211_state, int);
 112 Static void             rum_txeof(usbd_xfer_handle, usbd_private_handle,
 113                             usbd_status);
 114 Static void             rum_rxeof(usbd_xfer_handle, usbd_private_handle,
 115                             usbd_status);
 116 Static uint8_t          rum_rxrate(struct rum_rx_desc *);
 117 Static int              rum_ack_rate(struct ieee80211com *, int);
 118 Static uint16_t         rum_txtime(int, int, uint32_t);
 119 Static uint8_t          rum_plcp_signal(int);
 120 Static void             rum_setup_tx_desc(struct rum_softc *,
 121                             struct rum_tx_desc *, uint32_t, uint16_t, int,
 122                             int);
 123 Static int              rum_tx_data(struct rum_softc *, struct mbuf *,
 124                             struct ieee80211_node *);
 125 Static void             rum_start(struct ifnet *);
 126 Static void             rum_watchdog(struct ifnet *);
 127 Static int              rum_ioctl(struct ifnet *, u_long, caddr_t,
 128                                   struct ucred *);
 129 Static void             rum_eeprom_read(struct rum_softc *, uint16_t, void *,
 130                             int);
 131 Static uint32_t         rum_read(struct rum_softc *, uint16_t);
 132 Static void             rum_read_multi(struct rum_softc *, uint16_t, void *,
 133                             int);
 134 Static void             rum_write(struct rum_softc *, uint16_t, uint32_t);
 135 Static void             rum_write_multi(struct rum_softc *, uint16_t, void *,
 136                             size_t);
 137 Static void             rum_bbp_write(struct rum_softc *, uint8_t, uint8_t);
 138 Static uint8_t          rum_bbp_read(struct rum_softc *, uint8_t);
 139 Static void             rum_rf_write(struct rum_softc *, uint8_t, uint32_t);
 140 Static void             rum_select_antenna(struct rum_softc *);
 141 Static void             rum_enable_mrr(struct rum_softc *);
 142 Static void             rum_set_txpreamble(struct rum_softc *);
 143 Static void             rum_set_basicrates(struct rum_softc *);
 144 Static void             rum_select_band(struct rum_softc *,
 145                             struct ieee80211_channel *);
 146 Static void             rum_set_chan(struct rum_softc *,
 147                             struct ieee80211_channel *);
 148 Static void             rum_enable_tsf_sync(struct rum_softc *);
 149 Static void             rum_update_slot(struct rum_softc *);
 150 Static void             rum_set_bssid(struct rum_softc *, const uint8_t *);
 151 Static void             rum_set_macaddr(struct rum_softc *, const uint8_t *);
 152 Static void             rum_update_promisc(struct rum_softc *);
 153 Static const char       *rum_get_rf(int);
 154 Static void             rum_read_eeprom(struct rum_softc *);
 155 Static int              rum_bbp_init(struct rum_softc *);
 156 Static void             rum_init(void *);
 157 Static void             rum_stop(struct rum_softc *);
 158 Static int              rum_load_microcode(struct rum_softc *, const uint8_t *,
 159                             size_t);
 160 Static int              rum_prepare_beacon(struct rum_softc *);
 161
 162 Static void             rum_stats_timeout(void *);
 163 Static void             rum_stats_update(usbd_xfer_handle, usbd_private_handle,
 164                                          usbd_status);
 165 Static void             rum_stats(struct ieee80211com *,
 166                                   struct ieee80211_node *,
 167                                   struct ieee80211_ratectl_stats *);
 168 Static void             rum_ratectl_change(struct ieee80211com *ic, u_int,
 169                                            u_int);
 170 Static int              rum_get_rssi(struct rum_softc *, uint8_t);
 171
 172 /*
 173  * Supported rates for 802.11a/b/g modes (in 500Kbps unit).
 174  */
 175 static const struct ieee80211_rateset rum_rateset_11a =
 176         { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } };
 177
 178 static const struct ieee80211_rateset rum_rateset_11b =
 179         { 4, { 2, 4, 11, 22 } };
 180
 181 static const struct ieee80211_rateset rum_rateset_11g =
 182         { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } };
 183
 184 static const struct {
 185         uint32_t        reg;
 186         uint32_t        val;
 187 } rum_def_mac[] = {
 188         RT2573_DEF_MAC
 189 };
 190
 191 static const struct {
 192         uint8_t reg;
 193         uint8_t val;
 194 } rum_def_bbp[] = {
 195         RT2573_DEF_BBP
 196 };
 197
 198 static const struct rfprog {
 199         uint8_t         chan;
 200         uint32_t        r1, r2, r3, r4;
 201 }  rum_rf5226[] = {
 202         RT2573_RF5226
 203 }, rum_rf5225[] = {
 204         RT2573_RF5225
 205 };
 206
 207 USB_DECLARE_DRIVER(rum);
 208 DRIVER_MODULE(rum, uhub, rum_driver, rum_devclass, usbd_driver_load, 0);
 209
 210 USB_MATCH(rum)
 211 {
 212         USB_MATCH_START(rum, uaa);
 213
 214         if (uaa->iface != NULL)
 215                 return UMATCH_NONE;
 216
 217         return (usb_lookup(rum_devs, uaa->vendor, uaa->product) != NULL) ?
 218             UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
 219 }
 220
 221 USB_ATTACH(rum)
 222 {
 223         USB_ATTACH_START(rum, sc, uaa);
 224         struct ieee80211com *ic = &sc->sc_ic;
 225         struct ifnet *ifp = &ic->ic_if;
 226         usb_interface_descriptor_t *id;
 227         usb_endpoint_descriptor_t *ed;
 228         usbd_status error;
 229         char devinfo[1024];
 230         int i, ntries;
 231         uint32_t tmp;
 232
 233         sc->sc_udev = uaa->device;
 234
 235         usbd_devinfo(uaa->device, 0, devinfo);
 236         USB_ATTACH_SETUP;
 237
 238         if (usbd_set_config_no(sc->sc_udev, RT2573_CONFIG_NO, 0) != 0) {
 239                 kprintf("%s: could not set configuration no\n",
 240                     USBDEVNAME(sc->sc_dev));
 241                 USB_ATTACH_ERROR_RETURN;
 242         }
 243
 244         /* get the first interface handle */
 245         error = usbd_device2interface_handle(sc->sc_udev, RT2573_IFACE_INDEX,
 246             &sc->sc_iface);
 247         if (error != 0) {
 248                 kprintf("%s: could not get interface handle\n",
 249                     USBDEVNAME(sc->sc_dev));
 250                 USB_ATTACH_ERROR_RETURN;
 251         }
 252
 253         /*
 254          * Find endpoints.
 255          */
 256         id = usbd_get_interface_descriptor(sc->sc_iface);
 257
 258         sc->sc_rx_no = sc->sc_tx_no = -1;
 259         for (i = 0; i < id->bNumEndpoints; i++) {
 260                 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
 261                 if (ed == NULL) {
 262                         kprintf("%s: no endpoint descriptor for iface %d\n",
 263                             USBDEVNAME(sc->sc_dev), i);
 264                         USB_ATTACH_ERROR_RETURN;
 265                 }
 266
 267                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
 268                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
 269                         sc->sc_rx_no = ed->bEndpointAddress;
 270                 else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
 271                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK)
 272                         sc->sc_tx_no = ed->bEndpointAddress;
 273         }
 274         if (sc->sc_rx_no == -1 || sc->sc_tx_no == -1) {
 275                 kprintf("%s: missing endpoint\n", USBDEVNAME(sc->sc_dev));
 276                 USB_ATTACH_ERROR_RETURN;
 277         }
 278
 279         usb_init_task(&sc->sc_task, rum_task, sc);
 280
 281         callout_init(&sc->scan_ch);
 282         callout_init(&sc->stats_ch);
 283
 284         /* retrieve RT2573 rev. no */
 285         for (ntries = 0; ntries < 1000; ntries++) {
 286                 if ((tmp = rum_read(sc, RT2573_MAC_CSR0)) != 0)
 287                         break;
 288                 DELAY(1000);
 289         }
 290         if (ntries == 1000) {
 291                 kprintf("%s: timeout waiting for chip to settle\n",
 292                     USBDEVNAME(sc->sc_dev));
 293                 USB_ATTACH_ERROR_RETURN;
 294         }
 295
 296         /* retrieve MAC address and various other things from EEPROM */
 297         rum_read_eeprom(sc);
 298
 299         kprintf("%s: MAC/BBP RT%04x (rev 0x%05x), RF %s, address %6D\n",
 300             USBDEVNAME(sc->sc_dev), sc->macbbp_rev, tmp,
 301             rum_get_rf(sc->rf_rev), ic->ic_myaddr, ":");
 302
 303         error = rum_load_microcode(sc, rt2573, sizeof(rt2573));
 304         if (error != 0) {
 305                 device_printf(self, "can't load microcode\n");
 306                 USB_ATTACH_ERROR_RETURN;
 307         }
 308
 309         ic->ic_phytype = IEEE80211_T_OFDM;      /* not only, but not used */
 310         ic->ic_opmode = IEEE80211_M_STA;        /* default to BSS mode */
 311         ic->ic_state = IEEE80211_S_INIT;
 312
 313         /* set device capabilities */
 314         ic->ic_caps =
 315             IEEE80211_C_IBSS |          /* IBSS mode supported */
 316             IEEE80211_C_MONITOR |       /* monitor mode supported */
 317             IEEE80211_C_HOSTAP |        /* HostAp mode supported */
 318             IEEE80211_C_TXPMGT |        /* tx power management */
 319             IEEE80211_C_SHPREAMBLE |    /* short preamble supported */
 320             IEEE80211_C_SHSLOT |        /* short slot time supported */
 321             IEEE80211_C_WPA;            /* WPA 1+2 */
 322
 323         if (sc->rf_rev == RT2573_RF_5225 || sc->rf_rev == RT2573_RF_5226) {
 324                 /* set supported .11a rates */
 325                 ic->ic_sup_rates[IEEE80211_MODE_11A] = rum_rateset_11a;
 326
 327                 /* set supported .11a channels */
 328                 for (i = 34; i <= 46; i += 4) {
 329                         ic->ic_channels[i].ic_freq =
 330                             ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
 331                         ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
 332                 }
 333                 for (i = 36; i <= 64; i += 4) {
 334                         ic->ic_channels[i].ic_freq =
 335                             ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
 336                         ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
 337                 }
 338                 for (i = 100; i <= 140; i += 4) {
 339                         ic->ic_channels[i].ic_freq =
 340                             ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
 341                         ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
 342                 }
 343                 for (i = 149; i <= 165; i += 4) {
 344                         ic->ic_channels[i].ic_freq =
 345                             ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ);
 346                         ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A;
 347                 }
 348         }
 349
 350         /* set supported .11b and .11g rates */
 351         ic->ic_sup_rates[IEEE80211_MODE_11B] = rum_rateset_11b;
 352         ic->ic_sup_rates[IEEE80211_MODE_11G] = rum_rateset_11g;
 353
 354         /* set supported .11b and .11g channels (1 through 14) */
 355         for (i = 1; i <= 14; i++) {
 356                 ic->ic_channels[i].ic_freq =
 357                     ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ);
 358                 ic->ic_channels[i].ic_flags =
 359                     IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM |
 360                     IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ;
 361         }
 362
 363         if_initname(ifp, device_get_name(self), device_get_unit(self));
 364         ifp->if_softc = sc;
 365         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 366         ifp->if_init = rum_init;
 367         ifp->if_ioctl = rum_ioctl;
 368         ifp->if_start = rum_start;
 369         ifp->if_watchdog = rum_watchdog;
 370         ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 371         ifq_set_ready(&ifp->if_snd);
 372
 373         ic->ic_ratectl.rc_st_ratectl_cap = IEEE80211_RATECTL_CAP_ONOE;
 374         ic->ic_ratectl.rc_st_ratectl = IEEE80211_RATECTL_ONOE;
 375         ic->ic_ratectl.rc_st_valid_stats =
 376                 IEEE80211_RATECTL_STATS_PKT_NORETRY |
 377                 IEEE80211_RATECTL_STATS_PKT_OK |
 378                 IEEE80211_RATECTL_STATS_PKT_ERR |
 379                 IEEE80211_RATECTL_STATS_RETRIES;
 380         ic->ic_ratectl.rc_st_stats = rum_stats;
 381         ic->ic_ratectl.rc_st_change = rum_ratectl_change;
 382
 383         ieee80211_ifattach(ic);
 384
 385         /* Enable software beacon missing handling. */
 386         ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS;
 387
 388         /* override state transition machine */
 389         sc->sc_newstate = ic->ic_newstate;
 390         ic->ic_newstate = rum_newstate;
 391         ieee80211_media_init(ic, rum_media_change, ieee80211_media_status);
 392
 393         bpfattach_dlt(ifp, DLT_IEEE802_11_RADIO,
 394             sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
 395             &sc->sc_drvbpf);
 396
 397         sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
 398         sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
 399         sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2573_RX_RADIOTAP_PRESENT);
 400
 401         sc->sc_txtap_len = sizeof sc->sc_txtapu;
 402         sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
 403         sc->sc_txtap.wt_ihdr.it_present = htole32(RT2573_TX_RADIOTAP_PRESENT);
 404
 405         if (bootverbose)
 406                 ieee80211_announce(ic);
 407
 408         USB_ATTACH_SUCCESS_RETURN;
 409 }
 410
 411 USB_DETACH(rum)
 412 {
 413         USB_DETACH_START(rum, sc);
 414         struct ifnet *ifp = &sc->sc_ic.ic_if;
 415
 416 #ifdef spl
 417         s = splusb();
 418 #endif
 419
 420         lwkt_serialize_enter(ifp->if_serializer);
 421
 422         callout_stop(&sc->scan_ch);
 423         callout_stop(&sc->stats_ch);
 424
 425         sc->sc_flags |= RUM_FLAG_SYNCTASK;
 426         rum_stop(sc);
 427
 428         lwkt_serialize_exit(ifp->if_serializer);
 429
 430         usb_rem_task(sc->sc_udev, &sc->sc_task);
 431
 432         bpfdetach(ifp);
 433         ieee80211_ifdetach(&sc->sc_ic); /* free all nodes */
 434
 435         if (sc->stats_xfer != NULL) {
 436                 usbd_free_xfer(sc->stats_xfer);
 437                 sc->stats_xfer = NULL;
 438         }
 439
 440         if (sc->sc_rx_pipeh != NULL) {
 441                 usbd_abort_pipe(sc->sc_rx_pipeh);
 442                 usbd_close_pipe(sc->sc_rx_pipeh);
 443         }
 444
 445         if (sc->sc_tx_pipeh != NULL) {
 446                 usbd_abort_pipe(sc->sc_tx_pipeh);
 447                 usbd_close_pipe(sc->sc_tx_pipeh);
 448         }
 449
 450         rum_free_rx_list(sc);
 451         rum_free_tx_list(sc);
 452
 453 #ifdef spl
 454         splx(s);
 455 #endif
 456         return 0;
 457 }
 458
 459 Static int
 460 rum_alloc_tx_list(struct rum_softc *sc)
 461 {
 462         struct rum_tx_data *data;
 463         int i, error;
 464
 465         sc->tx_queued = 0;
 466
 467         for (i = 0; i < RT2573_TX_LIST_COUNT; i++) {
 468                 data = &sc->tx_data[i];
 469
 470                 data->sc = sc;
 471
 472                 data->xfer = usbd_alloc_xfer(sc->sc_udev);
 473                 if (data->xfer == NULL) {
 474                         kprintf("%s: could not allocate tx xfer\n",
 475                             USBDEVNAME(sc->sc_dev));
 476                         error = ENOMEM;
 477                         goto fail;
 478                 }
 479
 480                 data->buf = usbd_alloc_buffer(data->xfer,
 481                     RT2573_TX_DESC_SIZE + IEEE80211_MAX_LEN);
 482                 if (data->buf == NULL) {
 483                         kprintf("%s: could not allocate tx buffer\n",
 484                             USBDEVNAME(sc->sc_dev));
 485                         error = ENOMEM;
 486                         goto fail;
 487                 }
 488
 489                 /* clean Tx descriptor */
 490                 bzero(data->buf, RT2573_TX_DESC_SIZE);
 491         }
 492
 493         return 0;
 494
 495 fail:   rum_free_tx_list(sc);
 496         return error;
 497 }
 498
 499 Static void
 500 rum_free_tx_list(struct rum_softc *sc)
 501 {
 502         struct rum_tx_data *data;
 503         int i;
 504
 505         for (i = 0; i < RT2573_TX_LIST_COUNT; i++) {
 506                 data = &sc->tx_data[i];
 507
 508                 if (data->xfer != NULL) {
 509                         usbd_free_xfer(data->xfer);
 510                         data->xfer = NULL;
 511                 }
 512
 513                 if (data->ni != NULL) {
 514                         ieee80211_free_node(data->ni);
 515                         data->ni = NULL;
 516                 }
 517         }
 518 }
 519
 520 Static int
 521 rum_alloc_rx_list(struct rum_softc *sc)
 522 {
 523         struct rum_rx_data *data;
 524         int i, error;
 525
 526         for (i = 0; i < RT2573_RX_LIST_COUNT; i++) {
 527                 data = &sc->rx_data[i];
 528
 529                 data->sc = sc;
 530
 531                 data->xfer = usbd_alloc_xfer(sc->sc_udev);
 532                 if (data->xfer == NULL) {
 533                         kprintf("%s: could not allocate rx xfer\n",
 534                             USBDEVNAME(sc->sc_dev));
 535                         error = ENOMEM;
 536                         goto fail;
 537                 }
 538
 539                 if (usbd_alloc_buffer(data->xfer, MCLBYTES) == NULL) {
 540                         kprintf("%s: could not allocate rx buffer\n",
 541                             USBDEVNAME(sc->sc_dev));
 542                         error = ENOMEM;
 543                         goto fail;
 544                 }
 545
 546                 data->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
 547                 if (data->m == NULL) {
 548                         kprintf("%s: could not allocate rx mbuf\n",
 549                             USBDEVNAME(sc->sc_dev));
 550                         error = ENOMEM;
 551                         goto fail;
 552                 }
 553
 554                 data->buf = mtod(data->m, uint8_t *);
 555                 bzero(data->buf, sizeof(struct rum_rx_desc));
 556         }
 557
 558         return 0;
 559
 560 fail:   rum_free_tx_list(sc);
 561         return error;
 562 }
 563
 564 Static void
 565 rum_free_rx_list(struct rum_softc *sc)
 566 {
 567         struct rum_rx_data *data;
 568         int i;
 569
 570         for (i = 0; i < RT2573_RX_LIST_COUNT; i++) {
 571                 data = &sc->rx_data[i];
 572
 573                 if (data->xfer != NULL) {
 574                         usbd_free_xfer(data->xfer);
 575                         data->xfer = NULL;
 576                 }
 577
 578                 if (data->m != NULL) {
 579                         m_freem(data->m);
 580                         data->m = NULL;
 581                 }
 582         }
 583 }
 584
 585 Static int
 586 rum_media_change(struct ifnet *ifp)
 587 {
 588         int error;
 589
 590         error = ieee80211_media_change(ifp);
 591         if (error != ENETRESET)
 592                 return error;
 593
 594         if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING))
 595                 rum_init(ifp->if_softc);
 596
 597         return 0;
 598 }
 599
 600 /*
 601  * This function is called periodically (every 200ms) during scanning to
 602  * switch from one channel to another.
 603  */
 604 Static void
 605 rum_next_scan(void *arg)
 606 {
 607         struct rum_softc *sc = arg;
 608         struct ieee80211com *ic = &sc->sc_ic;
 609         struct ifnet *ifp = &ic->ic_if;
 610
 611         lwkt_serialize_enter(ifp->if_serializer);
 612
 613         if (ic->ic_state == IEEE80211_S_SCAN)
 614                 ieee80211_next_scan(ic);
 615
 616         lwkt_serialize_exit(ifp->if_serializer);
 617 }
 618
 619 Static void
 620 rum_task(void *arg)
 621 {
 622         struct rum_softc *sc = arg;
 623         struct ieee80211com *ic = &sc->sc_ic;
 624         struct ifnet *ifp = &ic->ic_if;
 625         enum ieee80211_state ostate;
 626         struct ieee80211_node *ni;
 627         uint32_t tmp;
 628
 629         lwkt_serialize_enter(ifp->if_serializer);
 630
 631         ieee80211_ratectl_newstate(ic, sc->sc_state);
 632
 633         ostate = ic->ic_state;
 634
 635         switch (sc->sc_state) {
 636         case IEEE80211_S_INIT:
 637                 if (ostate == IEEE80211_S_RUN) {
 638                         /* abort TSF synchronization */
 639                         tmp = rum_read(sc, RT2573_TXRX_CSR9);
 640                         rum_write(sc, RT2573_TXRX_CSR9, tmp & ~0x00ffffff);
 641                 }
 642                 break;
 643
 644         case IEEE80211_S_SCAN:
 645                 rum_set_chan(sc, ic->ic_curchan);
 646                 callout_reset(&sc->scan_ch, hz / 5, rum_next_scan, sc);
 647                 break;
 648
 649         case IEEE80211_S_AUTH:
 650                 rum_set_chan(sc, ic->ic_curchan);
 651                 break;
 652
 653         case IEEE80211_S_ASSOC:
 654                 rum_set_chan(sc, ic->ic_curchan);
 655                 break;
 656
 657         case IEEE80211_S_RUN:
 658                 rum_set_chan(sc, ic->ic_curchan);
 659
 660                 ni = ic->ic_bss;
 661
 662                 lwkt_serialize_exit(ifp->if_serializer);
 663
 664                 if (ic->ic_opmode != IEEE80211_M_MONITOR) {
 665                         rum_update_slot(sc);
 666                         rum_enable_mrr(sc);
 667                         rum_set_txpreamble(sc);
 668                         rum_set_basicrates(sc);
 669                         rum_set_bssid(sc, ni->ni_bssid);
 670                 }
 671
 672                 if (ic->ic_opmode == IEEE80211_M_HOSTAP ||
 673                     ic->ic_opmode == IEEE80211_M_IBSS)
 674                         rum_prepare_beacon(sc);
 675
 676                 if (ic->ic_opmode != IEEE80211_M_MONITOR)
 677                         rum_enable_tsf_sync(sc);
 678
 679                 /* clear statistic registers (STA_CSR0 to STA_CSR5) */
 680                 rum_read_multi(sc, RT2573_STA_CSR0, sc->sta, sizeof(sc->sta));
 681
 682                 lwkt_serialize_enter(ifp->if_serializer);
 683
 684                 callout_reset(&sc->stats_ch, 4 * hz / 5, rum_stats_timeout, sc);
 685
 686                 break;
 687         }
 688
 689         sc->sc_newstate(ic, sc->sc_state, sc->sc_arg);
 690
 691         lwkt_serialize_exit(ifp->if_serializer);
 692 }
 693
 694 Static int
 695 rum_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
 696 {
 697         struct rum_softc *sc = ic->ic_if.if_softc;
 698         struct ifnet *ifp = &ic->ic_if;
 699
 700         ASSERT_SERIALIZED(ifp->if_serializer);
 701
 702         callout_stop(&sc->scan_ch);
 703         callout_stop(&sc->stats_ch);
 704
 705         /* do it in a process context */
 706         sc->sc_state = nstate;
 707         sc->sc_arg = arg;
 708
 709         lwkt_serialize_exit(ifp->if_serializer);
 710         usb_rem_task(sc->sc_udev, &sc->sc_task);
 711
 712         if (sc->sc_flags & RUM_FLAG_SYNCTASK) {
 713                 usb_do_task(sc->sc_udev, &sc->sc_task, USB_TASKQ_DRIVER,
 714                             USBD_NO_TIMEOUT);
 715         } else {
 716                 usb_add_task(sc->sc_udev, &sc->sc_task, USB_TASKQ_DRIVER);
 717         }
 718         lwkt_serialize_enter(ifp->if_serializer);
 719
 720         return 0;
 721 }
 722
 723 /* quickly determine if a given rate is CCK or OFDM */
 724 #define RUM_RATE_IS_OFDM(rate)  ((rate) >= 12 && (rate) != 22)
 725
 726 #define RUM_ACK_SIZE    14      /* 10 + 4(FCS) */
 727 #define RUM_CTS_SIZE    14      /* 10 + 4(FCS) */
 728
 729 Static void
 730 rum_txeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 731 {
 732         struct rum_tx_data *data = priv;
 733         struct rum_softc *sc = data->sc;
 734         struct ieee80211com *ic = &sc->sc_ic;
 735         struct ifnet *ifp = &ic->ic_if;
 736
 737         if (status != USBD_NORMAL_COMPLETION) {
 738                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
 739                         return;
 740
 741                 kprintf("%s: could not transmit buffer: %s\n",
 742                     USBDEVNAME(sc->sc_dev), usbd_errstr(status));
 743
 744                 if (status == USBD_STALLED)
 745                         usbd_clear_endpoint_stall_async(sc->sc_tx_pipeh);
 746
 747                 ifp->if_oerrors++;
 748                 return;
 749         }
 750
 751 #ifdef spl
 752         s = splnet();
 753 #endif
 754
 755         lwkt_serialize_enter(ifp->if_serializer);
 756
 757         m_freem(data->m);
 758         data->m = NULL;
 759         ieee80211_free_node(data->ni);
 760         data->ni = NULL;
 761
 762         bzero(data->buf, sizeof(struct rum_tx_data));
 763         sc->tx_queued--;
 764         ifp->if_opackets++;
 765
 766         DPRINTFN(10, ("tx done\n"));
 767
 768         sc->sc_tx_timer = 0;
 769         ifp->if_flags &= ~IFF_OACTIVE;
 770         rum_start(ifp);
 771
 772         lwkt_serialize_exit(ifp->if_serializer);
 773
 774 #ifdef spl
 775         splx(s);
 776 #endif
 777 }
 778
 779 Static void
 780 rum_rxeof(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 781 {
 782         struct rum_rx_data *data = priv;
 783         struct rum_softc *sc = data->sc;
 784         struct ieee80211com *ic = &sc->sc_ic;
 785         struct ifnet *ifp = &ic->ic_if;
 786         struct rum_rx_desc *desc;
 787         struct ieee80211_frame_min *wh;
 788         struct ieee80211_node *ni;
 789         struct mbuf *mnew, *m;
 790         int len, rssi;
 791
 792         if (status != USBD_NORMAL_COMPLETION) {
 793                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
 794                         return;
 795
 796                 if (status == USBD_STALLED)
 797                         usbd_clear_endpoint_stall_async(sc->sc_rx_pipeh);
 798                 goto skip;
 799         }
 800
 801         usbd_get_xfer_status(xfer, NULL, NULL, &len, NULL);
 802
 803         if (len < RT2573_RX_DESC_SIZE + sizeof (struct ieee80211_frame_min)) {
 804                 DPRINTF(("%s: xfer too short %d\n", USBDEVNAME(sc->sc_dev),
 805                     len));
 806                 ifp->if_ierrors++;
 807                 goto skip;
 808         }
 809
 810         desc = (struct rum_rx_desc *)data->buf;
 811
 812         if (le32toh(desc->flags) & RT2573_RX_CRC_ERROR) {
 813                 /*
 814                  * This should not happen since we did not request to receive
 815                  * those frames when we filled RT2573_TXRX_CSR0.
 816                  */
 817                 DPRINTFN(5, ("CRC error\n"));
 818                 ifp->if_ierrors++;
 819                 goto skip;
 820         }
 821
 822         mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
 823         if (mnew == NULL) {
 824                 kprintf("%s: could not allocate rx mbuf\n",
 825                     USBDEVNAME(sc->sc_dev));
 826                 ifp->if_ierrors++;
 827                 goto skip;
 828         }
 829
 830         m = data->m;
 831         data->m = mnew;
 832         data->buf = mtod(data->m, uint8_t *);
 833
 834         /* finalize mbuf */
 835         m->m_pkthdr.rcvif = ifp;
 836         m->m_data = (caddr_t)(desc + 1);
 837         m->m_pkthdr.len = m->m_len = (le32toh(desc->flags) >> 16) & 0xfff;
 838
 839 #ifdef spl
 840         s = splnet();
 841 #endif
 842
 843         lwkt_serialize_enter(ifp->if_serializer);
 844
 845         rssi = rum_get_rssi(sc, desc->rssi);
 846
 847         wh = mtod(m, struct ieee80211_frame_min *);
 848         ni = ieee80211_find_rxnode(ic, wh);
 849
 850         /* Error happened during RSSI conversion. */
 851         if (rssi < 0)
 852                 rssi = ni->ni_rssi;
 853
 854         if (sc->sc_drvbpf != NULL) {
 855                 struct rum_rx_radiotap_header *tap = &sc->sc_rxtap;
 856
 857                 tap->wr_flags = 0;
 858                 tap->wr_rate = rum_rxrate(desc);
 859                 tap->wr_chan_freq = htole16(ic->ic_bss->ni_chan->ic_freq);
 860                 tap->wr_chan_flags = htole16(ic->ic_bss->ni_chan->ic_flags);
 861                 tap->wr_antenna = sc->rx_ant;
 862                 tap->wr_antsignal = rssi;
 863
 864                 bpf_ptap(sc->sc_drvbpf, m, tap, sc->sc_rxtap_len);
 865         }
 866
 867         /* send the frame to the 802.11 layer */
 868         ieee80211_input(ic, m, ni, rssi, 0);
 869
 870         /* node is no longer needed */
 871         ieee80211_free_node(ni);
 872
 873         /*
 874          * In HostAP mode, ieee80211_input() will enqueue packets in if_snd
 875          * without calling if_start().
 876          */
 877         if (!ifq_is_empty(&ifp->if_snd) && !(ifp->if_flags & IFF_OACTIVE))
 878                 rum_start(ifp);
 879
 880 #ifdef spl
 881         splx(s);
 882 #endif
 883
 884         lwkt_serialize_exit(ifp->if_serializer);
 885
 886         DPRINTFN(15, ("rx done\n"));
 887
 888 skip:   /* setup a new transfer */
 889         bzero(data->buf, sizeof(struct rum_rx_desc));
 890         usbd_setup_xfer(xfer, sc->sc_rx_pipeh, data, data->buf, MCLBYTES,
 891             USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, rum_rxeof);
 892         usbd_transfer(xfer);
 893 }
 894
 895 /*
 896  * This function is only used by the Rx radiotap code. It returns the rate at
 897  * which a given frame was received.
 898  */
 899 Static uint8_t
 900 rum_rxrate(struct rum_rx_desc *desc)
 901 {
 902         if (le32toh(desc->flags) & RT2573_RX_OFDM) {
 903                 /* reverse function of rum_plcp_signal */
 904                 switch (desc->rate) {
 905                 case 0xb:       return 12;
 906                 case 0xf:       return 18;
 907                 case 0xa:       return 24;
 908                 case 0xe:       return 36;
 909                 case 0x9:       return 48;
 910                 case 0xd:       return 72;
 911                 case 0x8:       return 96;
 912                 case 0xc:       return 108;
 913                 }
 914         } else {
 915                 if (desc->rate == 10)
 916                         return 2;
 917                 if (desc->rate == 20)
 918                         return 4;
 919                 if (desc->rate == 55)
 920                         return 11;
 921                 if (desc->rate == 110)
 922                         return 22;
 923         }
 924         return 2;       /* should not get there */
 925 }
 926
 927 /*
 928  * Return the expected ack rate for a frame transmitted at rate `rate'.
 929  * XXX: this should depend on the destination node basic rate set.
 930  */
 931 Static int
 932 rum_ack_rate(struct ieee80211com *ic, int rate)
 933 {
 934         switch (rate) {
 935         /* CCK rates */
 936         case 2:
 937                 return 2;
 938         case 4:
 939         case 11:
 940         case 22:
 941                 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate;
 942
 943         /* OFDM rates */
 944         case 12:
 945         case 18:
 946                 return 12;
 947         case 24:
 948         case 36:
 949                 return 24;
 950         case 48:
 951         case 72:
 952         case 96:
 953         case 108:
 954                 return 48;
 955         }
 956
 957         /* default to 1Mbps */
 958         return 2;
 959 }
 960
 961 /*
 962  * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'.
 963  * The function automatically determines the operating mode depending on the
 964  * given rate. `flags' indicates whether short preamble is in use or not.
 965  */
 966 Static uint16_t
 967 rum_txtime(int len, int rate, uint32_t flags)
 968 {
 969         uint16_t txtime;
 970
 971         if (RUM_RATE_IS_OFDM(rate)) {
 972                 /* IEEE Std 802.11a-1999, pp. 37 */
 973                 txtime = (8 + 4 * len + 3 + rate - 1) / rate;
 974                 txtime = 16 + 4 + 4 * txtime + 6;
 975         } else {
 976                 /* IEEE Std 802.11b-1999, pp. 28 */
 977                 txtime = (16 * len + rate - 1) / rate;
 978                 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE))
 979                         txtime +=  72 + 24;
 980                 else
 981                         txtime += 144 + 48;
 982         }
 983         return txtime;
 984 }
 985
 986 Static uint8_t
 987 rum_plcp_signal(int rate)
 988 {
 989         switch (rate) {
 990         /* CCK rates (returned values are device-dependent) */
 991         case 2:         return 0x0;
 992         case 4:         return 0x1;
 993         case 11:        return 0x2;
 994         case 22:        return 0x3;
 995
 996         /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
 997         case 12:        return 0xb;
 998         case 18:        return 0xf;
 999         case 24:        return 0xa;
1000         case 36:        return 0xe;
1001         case 48:        return 0x9;
1002         case 72:        return 0xd;
1003         case 96:        return 0x8;
1004         case 108:       return 0xc;
1005
1006         /* unsupported rates (should not get there) */
1007         default:        return 0xff;
1008         }
1009 }
1010
1011 Static void
1012 rum_setup_tx_desc(struct rum_softc *sc, struct rum_tx_desc *desc,
1013     uint32_t flags, uint16_t xflags, int len, int rate)
1014 {
1015         struct ieee80211com *ic = &sc->sc_ic;
1016         uint16_t plcp_length;
1017         int remainder;
1018
1019         desc->flags = htole32(flags);
1020         desc->flags |= htole32(len << 16);
1021
1022         desc->xflags = htole16(xflags);
1023
1024         desc->wme = htole16(
1025             RT2573_QID(0) |
1026             RT2573_AIFSN(2) |
1027             RT2573_LOGCWMIN(4) |
1028             RT2573_LOGCWMAX(10));
1029
1030         /* setup PLCP fields */
1031         desc->plcp_signal  = rum_plcp_signal(rate);
1032         desc->plcp_service = 4;
1033
1034         len += IEEE80211_CRC_LEN;
1035         if (RUM_RATE_IS_OFDM(rate)) {
1036                 desc->flags |= htole32(RT2573_TX_OFDM);
1037
1038                 plcp_length = len & 0xfff;
1039                 desc->plcp_length_hi = plcp_length >> 6;
1040                 desc->plcp_length_lo = plcp_length & 0x3f;
1041         } else {
1042                 plcp_length = (16 * len + rate - 1) / rate;
1043                 if (rate == 22) {
1044                         remainder = (16 * len) % 22;
1045                         if (remainder != 0 && remainder < 7)
1046                                 desc->plcp_service |= RT2573_PLCP_LENGEXT;
1047                 }
1048                 desc->plcp_length_hi = plcp_length >> 8;
1049                 desc->plcp_length_lo = plcp_length & 0xff;
1050
1051                 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
1052                         desc->plcp_signal |= 0x08;
1053         }
1054         desc->flags |= htole32(RT2573_TX_VALID);
1055 }
1056
1057 #define RUM_TX_TIMEOUT  5000
1058
1059 Static int
1060 rum_tx_data(struct rum_softc *sc, struct mbuf *m0, struct ieee80211_node *ni)
1061 {
1062         struct ieee80211com *ic = &sc->sc_ic;
1063         struct rum_tx_desc *desc;
1064         struct rum_tx_data *data;
1065         struct ieee80211_frame *wh;
1066         uint32_t flags = 0;
1067         uint16_t dur;
1068         usbd_status error;
1069         int xferlen, rate;
1070
1071         wh = mtod(m0, struct ieee80211_frame *);
1072
1073         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1074                 if (ieee80211_crypto_encap(ic, ni, m0) == NULL) {
1075                         m_freem(m0);
1076                         return ENOBUFS;
1077                 }
1078
1079                 /* packet header may have moved, reset our local pointer */
1080                 wh = mtod(m0, struct ieee80211_frame *);
1081         }
1082
1083         /* pickup a rate */
1084         if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1085             IEEE80211_FC0_TYPE_MGT) {
1086                 /* mgmt frames are sent at the lowest available bit-rate */
1087                 rate = ni->ni_rates.rs_rates[0];
1088         } else {
1089                 if (ic->ic_fixed_rate != -1) {
1090                         rate = ic->ic_sup_rates[ic->ic_curmode].
1091                             rs_rates[ic->ic_fixed_rate];
1092                 } else
1093                         rate = ni->ni_rates.rs_rates[ni->ni_txrate];
1094         }
1095         rate &= IEEE80211_RATE_VAL;
1096         if (rate == 0)
1097                 rate = 2;       /* fallback to 1Mbps; should not happen  */
1098
1099         data = &sc->tx_data[0];
1100         desc = (struct rum_tx_desc *)data->buf;
1101
1102         data->m = m0;
1103         data->ni = ni;
1104
1105         if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1106                 flags |= RT2573_TX_ACK;
1107
1108                 dur = rum_txtime(RUM_ACK_SIZE, rum_ack_rate(ic, rate),
1109                     ic->ic_flags) + sc->sifs;
1110                 *(uint16_t *)wh->i_dur = htole16(dur);
1111
1112                 /* tell hardware to set timestamp in probe responses */
1113                 if ((wh->i_fc[0] &
1114                     (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) ==
1115                     (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP))
1116                         flags |= RT2573_TX_TIMESTAMP;
1117         }
1118
1119         if (sc->sc_drvbpf != NULL) {
1120                 struct rum_tx_radiotap_header *tap = &sc->sc_txtap;
1121
1122                 tap->wt_flags = 0;
1123                 tap->wt_rate = rate;
1124                 tap->wt_chan_freq = htole16(ic->ic_bss->ni_chan->ic_freq);
1125                 tap->wt_chan_flags = htole16(ic->ic_bss->ni_chan->ic_flags);
1126                 tap->wt_antenna = sc->tx_ant;
1127
1128                 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len);
1129         }
1130
1131         m_copydata(m0, 0, m0->m_pkthdr.len, data->buf + RT2573_TX_DESC_SIZE);
1132         rum_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate);
1133
1134         /* align end on a 4-bytes boundary */
1135         xferlen = (RT2573_TX_DESC_SIZE + m0->m_pkthdr.len + 3) & ~3;
1136
1137         /*
1138          * No space left in the last URB to store the extra 4 bytes, force
1139          * sending of another URB.
1140          */
1141         if ((xferlen % 64) == 0)
1142                 xferlen += 4;
1143
1144         DPRINTFN(10, ("sending frame len=%u rate=%u xfer len=%u\n",
1145             m0->m_pkthdr.len + RT2573_TX_DESC_SIZE, rate, xferlen));
1146
1147         usbd_setup_xfer(data->xfer, sc->sc_tx_pipeh, data, data->buf, xferlen,
1148             USBD_FORCE_SHORT_XFER | USBD_NO_COPY, RUM_TX_TIMEOUT, rum_txeof);
1149
1150         error = usbd_transfer(data->xfer);
1151         if (error != USBD_NORMAL_COMPLETION && error != USBD_IN_PROGRESS) {
1152                 m_freem(m0);
1153                 return error;
1154         }
1155
1156         sc->tx_queued++;
1157
1158         return 0;
1159 }
1160
1161 Static void
1162 rum_start(struct ifnet *ifp)
1163 {
1164         struct rum_softc *sc = ifp->if_softc;
1165         struct ieee80211com *ic = &sc->sc_ic;
1166         struct ieee80211_node *ni;
1167         struct mbuf *m0;
1168
1169         ASSERT_SERIALIZED(ifp->if_serializer);
1170
1171         /*
1172          * net80211 may still try to send management frames even if the
1173          * IFF_RUNNING flag is not set...
1174          */
1175         if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
1176                 return;
1177
1178         for (;;) {
1179                 if (!IF_QEMPTY(&ic->ic_mgtq)) {
1180                         if (sc->tx_queued >= RT2573_TX_LIST_COUNT) {
1181                                 ifp->if_flags |= IFF_OACTIVE;
1182                                 break;
1183                         }
1184                         IF_DEQUEUE(&ic->ic_mgtq, m0);
1185
1186                         ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif;
1187                         m0->m_pkthdr.rcvif = NULL;
1188
1189                         BPF_MTAP(ifp, m0);
1190
1191                         if (rum_tx_data(sc, m0, ni) != 0)
1192                                 break;
1193
1194                 } else {
1195                         struct ether_header *eh;
1196
1197                         if (ic->ic_state != IEEE80211_S_RUN)
1198                                 break;
1199
1200                         m0 = ifq_poll(&ifp->if_snd);
1201                         if (m0 == NULL)
1202                                 break;
1203                         if (sc->tx_queued >= RT2573_TX_LIST_COUNT) {
1204                                 ifp->if_flags |= IFF_OACTIVE;
1205                                 break;
1206                         }
1207                         ifq_dequeue(&ifp->if_snd, m0);
1208
1209                         if (m0->m_len < sizeof (struct ether_header) &&
1210                             !(m0 = m_pullup(m0, sizeof (struct ether_header))))
1211                                 continue;
1212
1213                         eh = mtod(m0, struct ether_header *);
1214                         ni = ieee80211_find_txnode(ic, eh->ether_dhost);
1215                         if (ni == NULL) {
1216                                 m_freem(m0);
1217                                 continue;
1218                         }
1219
1220                         BPF_MTAP(ifp, m0);
1221
1222                         m0 = ieee80211_encap(ic, m0, ni);
1223                         if (m0 == NULL)
1224                                 continue;
1225
1226                         if (ic->ic_rawbpf != NULL)
1227                                 bpf_mtap(ic->ic_rawbpf, m0);
1228
1229                         if (rum_tx_data(sc, m0, ni) != 0) {
1230                                 if (ni != NULL)
1231                                         ieee80211_free_node(ni);
1232                                 ifp->if_oerrors++;
1233                                 break;
1234                         }
1235                 }
1236
1237                 sc->sc_tx_timer = 5;
1238                 ifp->if_timer = 1;
1239         }
1240 }
1241
1242 Static void
1243 rum_watchdog(struct ifnet *ifp)
1244 {
1245         struct rum_softc *sc = ifp->if_softc;
1246
1247         ASSERT_SERIALIZED(ifp->if_serializer);
1248
1249         ifp->if_timer = 0;
1250
1251         if (sc->sc_tx_timer > 0) {
1252                 if (--sc->sc_tx_timer == 0) {
1253                         kprintf("%s: device timeout\n", USBDEVNAME(sc->sc_dev));
1254                         /*rum_init(sc); XXX needs a process context! */
1255                         ifp->if_oerrors++;
1256                         return;
1257                 }
1258                 ifp->if_timer = 1;
1259         }
1260
1261         ieee80211_watchdog(&sc->sc_ic);
1262 }
1263
1264 Static int
1265 rum_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1266 {
1267         struct rum_softc *sc = ifp->if_softc;
1268         struct ieee80211com *ic = &sc->sc_ic;
1269         int error = 0;
1270
1271         ASSERT_SERIALIZED(ifp->if_serializer);
1272
1273 #ifdef spl
1274         s = splnet();
1275 #endif
1276
1277         switch (cmd) {
1278         case SIOCSIFFLAGS:
1279                 if (ifp->if_flags & IFF_UP) {
1280                         if (ifp->if_flags & IFF_RUNNING)
1281                                 rum_update_promisc(sc);
1282                         else
1283                                 rum_init(sc);
1284                 } else {
1285                         if (ifp->if_flags & IFF_RUNNING)
1286                                 rum_stop(sc);
1287                 }
1288                 break;
1289         default:
1290                 error = ieee80211_ioctl(ic, cmd, data, cr);
1291                 break;
1292         }
1293
1294         if (error == ENETRESET) {
1295                 struct ieee80211req *ireq = (struct ieee80211req *)data;
1296
1297                 if (cmd == SIOCS80211 &&
1298                     ireq->i_type == IEEE80211_IOC_CHANNEL &&
1299                     ic->ic_opmode == IEEE80211_M_MONITOR) {
1300                         /*
1301                          * This allows for fast channel switching in monitor mode
1302                          * (used by kismet). In IBSS mode, we must explicitly reset
1303                          * the interface to generate a new beacon frame.
1304                          */
1305                         rum_set_chan(sc, ic->ic_ibss_chan);
1306                 } else if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
1307                     (IFF_UP | IFF_RUNNING)) {
1308                         rum_init(sc);
1309                 }
1310                 error = 0;
1311         }
1312
1313 #ifdef spl
1314         splx(s);
1315 #endif
1316
1317         return error;
1318 }
1319
1320 Static void
1321 rum_eeprom_read(struct rum_softc *sc, uint16_t addr, void *buf, int len)
1322 {
1323         usb_device_request_t req;
1324         usbd_status error;
1325
1326         req.bmRequestType = UT_READ_VENDOR_DEVICE;
1327         req.bRequest = RT2573_READ_EEPROM;
1328         USETW(req.wValue, 0);
1329         USETW(req.wIndex, addr);
1330         USETW(req.wLength, len);
1331
1332         error = usbd_do_request(sc->sc_udev, &req, buf);
1333         if (error != 0) {
1334                 kprintf("%s: could not read EEPROM: %s\n",
1335                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
1336         }
1337 }
1338
1339 Static uint32_t
1340 rum_read(struct rum_softc *sc, uint16_t reg)
1341 {
1342         uint32_t val;
1343
1344         rum_read_multi(sc, reg, &val, sizeof val);
1345
1346         return le32toh(val);
1347 }
1348
1349 Static void
1350 rum_read_multi(struct rum_softc *sc, uint16_t reg, void *buf, int len)
1351 {
1352         usb_device_request_t req;
1353         usbd_status error;
1354
1355         req.bmRequestType = UT_READ_VENDOR_DEVICE;
1356         req.bRequest = RT2573_READ_MULTI_MAC;
1357         USETW(req.wValue, 0);
1358         USETW(req.wIndex, reg);
1359         USETW(req.wLength, len);
1360
1361         error = usbd_do_request(sc->sc_udev, &req, buf);
1362         if (error != 0) {
1363                 kprintf("%s: could not multi read MAC register: %s\n",
1364                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
1365         }
1366 }
1367
1368 Static void
1369 rum_write(struct rum_softc *sc, uint16_t reg, uint32_t val)
1370 {
1371         uint32_t tmp = htole32(val);
1372
1373         rum_write_multi(sc, reg, &tmp, sizeof tmp);
1374 }
1375
1376 Static void
1377 rum_write_multi(struct rum_softc *sc, uint16_t reg, void *buf, size_t len)
1378 {
1379         usb_device_request_t req;
1380         usbd_status error;
1381
1382         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
1383         req.bRequest = RT2573_WRITE_MULTI_MAC;
1384         USETW(req.wValue, 0);
1385         USETW(req.wIndex, reg);
1386         USETW(req.wLength, len);
1387
1388         error = usbd_do_request(sc->sc_udev, &req, buf);
1389         if (error != 0) {
1390                 kprintf("%s: could not multi write MAC register: %s\n",
1391                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
1392         }
1393 }
1394
1395 Static void
1396 rum_bbp_write(struct rum_softc *sc, uint8_t reg, uint8_t val)
1397 {
1398         uint32_t tmp;
1399         int ntries;
1400
1401         for (ntries = 0; ntries < 5; ntries++) {
1402                 if (!(rum_read(sc, RT2573_PHY_CSR3) & RT2573_BBP_BUSY))
1403                         break;
1404         }
1405         if (ntries == 5) {
1406                 kprintf("%s: could not write to BBP\n", USBDEVNAME(sc->sc_dev));
1407                 return;
1408         }
1409
1410         tmp = RT2573_BBP_BUSY | (reg & 0x7f) << 8 | val;
1411         rum_write(sc, RT2573_PHY_CSR3, tmp);
1412 }
1413
1414 Static uint8_t
1415 rum_bbp_read(struct rum_softc *sc, uint8_t reg)
1416 {
1417         uint32_t val;
1418         int ntries;
1419
1420         for (ntries = 0; ntries < 5; ntries++) {
1421                 if (!(rum_read(sc, RT2573_PHY_CSR3) & RT2573_BBP_BUSY))
1422                         break;
1423         }
1424         if (ntries == 5) {
1425                 kprintf("%s: could not read BBP\n", USBDEVNAME(sc->sc_dev));
1426                 return 0;
1427         }
1428
1429         val = RT2573_BBP_BUSY | RT2573_BBP_READ | reg << 8;
1430         rum_write(sc, RT2573_PHY_CSR3, val);
1431
1432         for (ntries = 0; ntries < 100; ntries++) {
1433                 val = rum_read(sc, RT2573_PHY_CSR3);
1434                 if (!(val & RT2573_BBP_BUSY))
1435                         return val & 0xff;
1436                 DELAY(1);
1437         }
1438
1439         kprintf("%s: could not read BBP\n", USBDEVNAME(sc->sc_dev));
1440         return 0;
1441 }
1442
1443 Static void
1444 rum_rf_write(struct rum_softc *sc, uint8_t reg, uint32_t val)
1445 {
1446         uint32_t tmp;
1447         int ntries;
1448
1449         for (ntries = 0; ntries < 5; ntries++) {
1450                 if (!(rum_read(sc, RT2573_PHY_CSR4) & RT2573_RF_BUSY))
1451                         break;
1452         }
1453         if (ntries == 5) {
1454                 kprintf("%s: could not write to RF\n", USBDEVNAME(sc->sc_dev));
1455                 return;
1456         }
1457
1458         tmp = RT2573_RF_BUSY | RT2573_RF_20BIT | (val & 0xfffff) << 2 |
1459             (reg & 3);
1460         rum_write(sc, RT2573_PHY_CSR4, tmp);
1461
1462         /* remember last written value in sc */
1463         sc->rf_regs[reg] = val;
1464
1465         DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 3, val & 0xfffff));
1466 }
1467
1468 Static void
1469 rum_select_antenna(struct rum_softc *sc)
1470 {
1471         uint8_t bbp4, bbp77;
1472         uint32_t tmp;
1473
1474         bbp4  = rum_bbp_read(sc, 4);
1475         bbp77 = rum_bbp_read(sc, 77);
1476
1477         /* TBD */
1478
1479         /* make sure Rx is disabled before switching antenna */
1480         tmp = rum_read(sc, RT2573_TXRX_CSR0);
1481         rum_write(sc, RT2573_TXRX_CSR0, tmp | RT2573_DISABLE_RX);
1482
1483         rum_bbp_write(sc,  4, bbp4);
1484         rum_bbp_write(sc, 77, bbp77);
1485
1486         rum_write(sc, RT2573_TXRX_CSR0, tmp);
1487 }
1488
1489 /*
1490  * Enable multi-rate retries for frames sent at OFDM rates.
1491  * In 802.11b/g mode, allow fallback to CCK rates.
1492  */
1493 Static void
1494 rum_enable_mrr(struct rum_softc *sc)
1495 {
1496         struct ieee80211com *ic = &sc->sc_ic;
1497         uint32_t tmp;
1498
1499         tmp = rum_read(sc, RT2573_TXRX_CSR4);
1500
1501         tmp &= ~RT2573_MRR_CCK_FALLBACK;
1502         if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan))
1503                 tmp |= RT2573_MRR_CCK_FALLBACK;
1504         tmp |= RT2573_MRR_ENABLED;
1505
1506         rum_write(sc, RT2573_TXRX_CSR4, tmp);
1507 }
1508
1509 Static void
1510 rum_set_txpreamble(struct rum_softc *sc)
1511 {
1512         uint32_t tmp;
1513
1514         tmp = rum_read(sc, RT2573_TXRX_CSR4);
1515
1516         tmp &= ~RT2573_SHORT_PREAMBLE;
1517         if (sc->sc_ic.ic_flags & IEEE80211_F_SHPREAMBLE)
1518                 tmp |= RT2573_SHORT_PREAMBLE;
1519
1520         rum_write(sc, RT2573_TXRX_CSR4, tmp);
1521 }
1522
1523 Static void
1524 rum_set_basicrates(struct rum_softc *sc)
1525 {
1526         struct ieee80211com *ic = &sc->sc_ic;
1527
1528         /* update basic rate set */
1529         if (ic->ic_curmode == IEEE80211_MODE_11B) {
1530                 /* 11b basic rates: 1, 2Mbps */
1531                 rum_write(sc, RT2573_TXRX_CSR5, 0x3);
1532         } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_bss->ni_chan)) {
1533                 /* 11a basic rates: 6, 12, 24Mbps */
1534                 rum_write(sc, RT2573_TXRX_CSR5, 0x150);
1535         } else {
1536                 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */
1537                 rum_write(sc, RT2573_TXRX_CSR5, 0x15f);
1538         }
1539 }
1540
1541 /*
1542  * Reprogram MAC/BBP to switch to a new band.  Values taken from the reference
1543  * driver.
1544  */
1545 Static void
1546 rum_select_band(struct rum_softc *sc, struct ieee80211_channel *c)
1547 {
1548         uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104;
1549         uint32_t tmp;
1550
1551         /* update all BBP registers that depend on the band */
1552         bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c;
1553         bbp35 = 0x50; bbp97 = 0x48; bbp98  = 0x48;
1554         if (IEEE80211_IS_CHAN_5GHZ(c)) {
1555                 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c;
1556                 bbp35 += 0x10; bbp97 += 0x10; bbp98  += 0x10;
1557         }
1558         if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) ||
1559             (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) {
1560                 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10;
1561         }
1562
1563         sc->bbp17 = bbp17;
1564         rum_bbp_write(sc,  17, bbp17);
1565         rum_bbp_write(sc,  96, bbp96);
1566         rum_bbp_write(sc, 104, bbp104);
1567
1568         if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) ||
1569             (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) {
1570                 rum_bbp_write(sc, 75, 0x80);
1571                 rum_bbp_write(sc, 86, 0x80);
1572                 rum_bbp_write(sc, 88, 0x80);
1573         }
1574
1575         rum_bbp_write(sc, 35, bbp35);
1576         rum_bbp_write(sc, 97, bbp97);
1577         rum_bbp_write(sc, 98, bbp98);
1578
1579         tmp = rum_read(sc, RT2573_PHY_CSR0);
1580         tmp &= ~(RT2573_PA_PE_2GHZ | RT2573_PA_PE_5GHZ);
1581         if (IEEE80211_IS_CHAN_2GHZ(c))
1582                 tmp |= RT2573_PA_PE_2GHZ;
1583         else
1584                 tmp |= RT2573_PA_PE_5GHZ;
1585         rum_write(sc, RT2573_PHY_CSR0, tmp);
1586
1587         /* 802.11a uses a 16 microseconds short interframe space */
1588         sc->sifs = IEEE80211_IS_CHAN_5GHZ(c) ? 16 : 10;
1589 }
1590
1591 Static void
1592 rum_set_chan(struct rum_softc *sc, struct ieee80211_channel *c)
1593 {
1594         struct ieee80211com *ic = &sc->sc_ic;
1595         struct ifnet *ifp = &ic->ic_if;
1596         const struct rfprog *rfprog;
1597         uint8_t bbp3, bbp94 = RT2573_BBPR94_DEFAULT;
1598         int8_t power;
1599         u_int i, chan;
1600
1601         ASSERT_SERIALIZED(ifp->if_serializer);
1602
1603         chan = ieee80211_chan2ieee(ic, c);
1604         if (chan == 0 || chan == IEEE80211_CHAN_ANY)
1605                 return;
1606
1607         lwkt_serialize_exit(ifp->if_serializer);
1608
1609         /* select the appropriate RF settings based on what EEPROM says */
1610         rfprog = (sc->rf_rev == RT2573_RF_5225 ||
1611                   sc->rf_rev == RT2573_RF_2527) ? rum_rf5225 : rum_rf5226;
1612
1613         /* find the settings for this channel (we know it exists) */
1614         for (i = 0; rfprog[i].chan != chan; i++)
1615                 ;       /* EMPTY */
1616
1617         power = sc->txpow[i];
1618         if (power < 0) {
1619                 bbp94 += power;
1620                 power = 0;
1621         } else if (power > 31) {
1622                 bbp94 += power - 31;
1623                 power = 31;
1624         }
1625
1626         /*
1627          * If we are switching from the 2GHz band to the 5GHz band or
1628          * vice-versa, BBP registers need to be reprogrammed.
1629          */
1630         if (c->ic_flags != sc->sc_curchan->ic_flags) {
1631                 rum_select_band(sc, c);
1632                 rum_select_antenna(sc);
1633         }
1634         sc->sc_curchan = c;
1635
1636         rum_rf_write(sc, RT2573_RF1, rfprog[i].r1);
1637         rum_rf_write(sc, RT2573_RF2, rfprog[i].r2);
1638         rum_rf_write(sc, RT2573_RF3, rfprog[i].r3 | power << 7);
1639         rum_rf_write(sc, RT2573_RF4, rfprog[i].r4 | sc->rffreq << 10);
1640
1641         rum_rf_write(sc, RT2573_RF1, rfprog[i].r1);
1642         rum_rf_write(sc, RT2573_RF2, rfprog[i].r2);
1643         rum_rf_write(sc, RT2573_RF3, rfprog[i].r3 | power << 7 | 1);
1644         rum_rf_write(sc, RT2573_RF4, rfprog[i].r4 | sc->rffreq << 10);
1645
1646         rum_rf_write(sc, RT2573_RF1, rfprog[i].r1);
1647         rum_rf_write(sc, RT2573_RF2, rfprog[i].r2);
1648         rum_rf_write(sc, RT2573_RF3, rfprog[i].r3 | power << 7);
1649         rum_rf_write(sc, RT2573_RF4, rfprog[i].r4 | sc->rffreq << 10);
1650
1651         DELAY(10);
1652
1653         /* enable smart mode for MIMO-capable RFs */
1654         bbp3 = rum_bbp_read(sc, 3);
1655
1656         bbp3 &= ~RT2573_SMART_MODE;
1657         if (sc->rf_rev == RT2573_RF_5225 || sc->rf_rev == RT2573_RF_2527)
1658                 bbp3 |= RT2573_SMART_MODE;
1659
1660         rum_bbp_write(sc, 3, bbp3);
1661
1662         if (bbp94 != RT2573_BBPR94_DEFAULT)
1663                 rum_bbp_write(sc, 94, bbp94);
1664
1665         lwkt_serialize_enter(ifp->if_serializer);
1666 }
1667
1668 /*
1669  * Enable TSF synchronization and tell h/w to start sending beacons for IBSS
1670  * and HostAP operating modes.
1671  */
1672 Static void
1673 rum_enable_tsf_sync(struct rum_softc *sc)
1674 {
1675         struct ieee80211com *ic = &sc->sc_ic;
1676         uint32_t tmp;
1677
1678         if (ic->ic_opmode != IEEE80211_M_STA) {
1679                 /*
1680                  * Change default 16ms TBTT adjustment to 8ms.
1681                  * Must be done before enabling beacon generation.
1682                  */
1683                 rum_write(sc, RT2573_TXRX_CSR10, 1 << 12 | 8);
1684         }
1685
1686         tmp = rum_read(sc, RT2573_TXRX_CSR9) & 0xff000000;
1687
1688         /* set beacon interval (in 1/16ms unit) */
1689         tmp |= ic->ic_bss->ni_intval * 16;
1690
1691         tmp |= RT2573_TSF_TICKING | RT2573_ENABLE_TBTT;
1692         if (ic->ic_opmode == IEEE80211_M_STA)
1693                 tmp |= RT2573_TSF_MODE(1);
1694         else
1695                 tmp |= RT2573_TSF_MODE(2) | RT2573_GENERATE_BEACON;
1696
1697         rum_write(sc, RT2573_TXRX_CSR9, tmp);
1698 }
1699
1700 Static void
1701 rum_update_slot(struct rum_softc *sc)
1702 {
1703         struct ieee80211com *ic = &sc->sc_ic;
1704         uint8_t slottime;
1705         uint32_t tmp;
1706
1707         slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
1708
1709         tmp = rum_read(sc, RT2573_MAC_CSR9);
1710         tmp = (tmp & ~0xff) | slottime;
1711         rum_write(sc, RT2573_MAC_CSR9, tmp);
1712
1713         DPRINTF(("setting slot time to %uus\n", slottime));
1714 }
1715
1716 Static void
1717 rum_set_bssid(struct rum_softc *sc, const uint8_t *bssid)
1718 {
1719         uint32_t tmp;
1720
1721         tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24;
1722         rum_write(sc, RT2573_MAC_CSR4, tmp);
1723
1724         tmp = bssid[4] | bssid[5] << 8 | RT2573_ONE_BSSID << 16;
1725         rum_write(sc, RT2573_MAC_CSR5, tmp);
1726 }
1727
1728 Static void
1729 rum_set_macaddr(struct rum_softc *sc, const uint8_t *addr)
1730 {
1731         uint32_t tmp;
1732
1733         tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24;
1734         rum_write(sc, RT2573_MAC_CSR2, tmp);
1735
1736         tmp = addr[4] | addr[5] << 8 | 0xff << 16;
1737         rum_write(sc, RT2573_MAC_CSR3, tmp);
1738 }
1739
1740 Static void
1741 rum_update_promisc(struct rum_softc *sc)
1742 {
1743         struct ifnet *ifp = &sc->sc_ic.ic_if;
1744         uint32_t tmp;
1745
1746         tmp = rum_read(sc, RT2573_TXRX_CSR0);
1747
1748         tmp &= ~RT2573_DROP_NOT_TO_ME;
1749         if (!(ifp->if_flags & IFF_PROMISC))
1750                 tmp |= RT2573_DROP_NOT_TO_ME;
1751
1752         rum_write(sc, RT2573_TXRX_CSR0, tmp);
1753
1754         DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ?
1755             "entering" : "leaving"));
1756 }
1757
1758 Static const char *
1759 rum_get_rf(int rev)
1760 {
1761         switch (rev) {
1762         case RT2573_RF_2527:    return "RT2527 (MIMO XR)";
1763         case RT2573_RF_2528:    return "RT2528";
1764         case RT2573_RF_5225:    return "RT5225 (MIMO XR)";
1765         case RT2573_RF_5226:    return "RT5226";
1766         default:                return "unknown";
1767         }
1768 }
1769
1770 Static void
1771 rum_read_eeprom(struct rum_softc *sc)
1772 {
1773         struct ieee80211com *ic = &sc->sc_ic;
1774         uint16_t val;
1775 #ifdef RUM_DEBUG
1776         int i;
1777 #endif
1778
1779         /* read MAC/BBP type */
1780         rum_eeprom_read(sc, RT2573_EEPROM_MACBBP, &val, 2);
1781         sc->macbbp_rev = le16toh(val);
1782
1783         /* read MAC address */
1784         rum_eeprom_read(sc, RT2573_EEPROM_ADDRESS, ic->ic_myaddr, 6);
1785
1786         rum_eeprom_read(sc, RT2573_EEPROM_ANTENNA, &val, 2);
1787         val = le16toh(val);
1788         sc->rf_rev =   (val >> 11) & 0x1f;
1789         sc->hw_radio = (val >> 10) & 0x1;
1790         sc->rx_ant =   (val >> 4)  & 0x3;
1791         sc->tx_ant =   (val >> 2)  & 0x3;
1792         sc->nb_ant =   val & 0x3;
1793
1794         DPRINTF(("RF revision=%d\n", sc->rf_rev));
1795
1796         rum_eeprom_read(sc, RT2573_EEPROM_CONFIG2, &val, 2);
1797         val = le16toh(val);
1798         sc->ext_5ghz_lna = (val >> 6) & 0x1;
1799         sc->ext_2ghz_lna = (val >> 4) & 0x1;
1800
1801         DPRINTF(("External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n",
1802             sc->ext_2ghz_lna, sc->ext_5ghz_lna));
1803
1804         rum_eeprom_read(sc, RT2573_EEPROM_RSSI_2GHZ_OFFSET, &val, 2);
1805         val = le16toh(val);
1806         if ((val & 0xff) != 0xff)
1807                 sc->rssi_2ghz_corr = (int8_t)(val & 0xff);      /* signed */
1808
1809         /* Only [-10, 10] is valid */
1810         if (sc->rssi_2ghz_corr < -10 || sc->rssi_2ghz_corr > 10)
1811                 sc->rssi_2ghz_corr = 0;
1812
1813         rum_eeprom_read(sc, RT2573_EEPROM_RSSI_5GHZ_OFFSET, &val, 2);
1814         val = le16toh(val);
1815         if ((val & 0xff) != 0xff)
1816                 sc->rssi_5ghz_corr = (int8_t)(val & 0xff);      /* signed */
1817
1818         /* Only [-10, 10] is valid */
1819         if (sc->rssi_5ghz_corr < -10 || sc->rssi_5ghz_corr > 10)
1820                 sc->rssi_5ghz_corr = 0;
1821
1822         if (sc->ext_2ghz_lna)
1823                 sc->rssi_2ghz_corr -= 14;
1824         if (sc->ext_5ghz_lna)
1825                 sc->rssi_5ghz_corr -= 14;
1826
1827         DPRINTF(("RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n",
1828             sc->rssi_2ghz_corr, sc->rssi_5ghz_corr));
1829
1830         rum_eeprom_read(sc, RT2573_EEPROM_FREQ_OFFSET, &val, 2);
1831         val = le16toh(val);
1832         if ((val & 0xff) != 0xff)
1833                 sc->rffreq = val & 0xff;
1834
1835         DPRINTF(("RF freq=%d\n", sc->rffreq));
1836
1837         /* read Tx power for all a/b/g channels */
1838         rum_eeprom_read(sc, RT2573_EEPROM_TXPOWER, sc->txpow, 14);
1839         /* XXX default Tx power for 802.11a channels */
1840         memset(sc->txpow + 14, 24, sizeof (sc->txpow) - 14);
1841 #ifdef RUM_DEBUG
1842         for (i = 0; i < 14; i++)
1843                 DPRINTF(("Channel=%d Tx power=%d\n", i + 1,  sc->txpow[i]));
1844 #endif
1845
1846         /* read default values for BBP registers */
1847         rum_eeprom_read(sc, RT2573_EEPROM_BBP_BASE, sc->bbp_prom, 2 * 16);
1848 #ifdef RUM_DEBUG
1849         for (i = 0; i < 14; i++) {
1850                 if (sc->bbp_prom[i].reg == 0 || sc->bbp_prom[i].reg == 0xff)
1851                         continue;
1852                 DPRINTF(("BBP R%d=%02x\n", sc->bbp_prom[i].reg,
1853                     sc->bbp_prom[i].val));
1854         }
1855 #endif
1856 }
1857
1858 Static int
1859 rum_bbp_init(struct rum_softc *sc)
1860 {
1861 #define N(a)    (sizeof (a) / sizeof ((a)[0]))
1862         int i, ntries;
1863         uint8_t val;
1864
1865         /* wait for BBP to be ready */
1866         for (ntries = 0; ntries < 100; ntries++) {
1867                 val = rum_bbp_read(sc, 0);
1868                 if (val != 0 && val != 0xff)
1869                         break;
1870                 DELAY(1000);
1871         }
1872         if (ntries == 100) {
1873                 kprintf("%s: timeout waiting for BBP\n",
1874                     USBDEVNAME(sc->sc_dev));
1875                 return EIO;
1876         }
1877
1878         /* initialize BBP registers to default values */
1879         for (i = 0; i < N(rum_def_bbp); i++)
1880                 rum_bbp_write(sc, rum_def_bbp[i].reg, rum_def_bbp[i].val);
1881
1882         /* write vendor-specific BBP values (from EEPROM) */
1883         for (i = 0; i < 16; i++) {
1884                 if (sc->bbp_prom[i].reg == 0 || sc->bbp_prom[i].reg == 0xff)
1885                         continue;
1886                 rum_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
1887         }
1888
1889         return 0;
1890 #undef N
1891 }
1892
1893 Static void
1894 rum_init(void *xsc)
1895 {
1896 #define N(a)    (sizeof (a) / sizeof ((a)[0]))
1897         struct rum_softc *sc = xsc;
1898         struct ieee80211com *ic = &sc->sc_ic;
1899         struct ifnet *ifp = &ic->ic_if;
1900         struct rum_rx_data *data;
1901         uint32_t tmp;
1902         usbd_status error;
1903         int i, ntries;
1904
1905         ASSERT_SERIALIZED(ifp->if_serializer);
1906
1907         rum_stop(sc);
1908
1909         /* initialize MAC registers to default values */
1910         for (i = 0; i < N(rum_def_mac); i++)
1911                 rum_write(sc, rum_def_mac[i].reg, rum_def_mac[i].val);
1912
1913         /* set host ready */
1914         rum_write(sc, RT2573_MAC_CSR1, 3);
1915         rum_write(sc, RT2573_MAC_CSR1, 0);
1916
1917         /* wait for BBP/RF to wakeup */
1918         for (ntries = 0; ntries < 1000; ntries++) {
1919                 if (rum_read(sc, RT2573_MAC_CSR12) & 8)
1920                         break;
1921                 rum_write(sc, RT2573_MAC_CSR12, 4);     /* force wakeup */
1922                 DELAY(1000);
1923         }
1924         if (ntries == 1000) {
1925                 kprintf("%s: timeout waiting for BBP/RF to wakeup\n",
1926                     USBDEVNAME(sc->sc_dev));
1927                 goto fail;
1928         }
1929
1930         if ((error = rum_bbp_init(sc)) != 0)
1931                 goto fail;
1932
1933         /* select default channel */
1934         sc->sc_curchan = ic->ic_curchan = ic->ic_ibss_chan;
1935         rum_select_band(sc, sc->sc_curchan);
1936         rum_select_antenna(sc);
1937         rum_set_chan(sc, sc->sc_curchan);
1938
1939         /* clear STA registers */
1940         rum_read_multi(sc, RT2573_STA_CSR0, sc->sta, sizeof sc->sta);
1941
1942         IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp));
1943         rum_set_macaddr(sc, ic->ic_myaddr);
1944
1945         /* initialize ASIC */
1946         rum_write(sc, RT2573_MAC_CSR1, 4);
1947
1948         /*
1949          * Allocate xfer for AMRR statistics requests.
1950          */
1951         sc->stats_xfer = usbd_alloc_xfer(sc->sc_udev);
1952         if (sc->stats_xfer == NULL) {
1953                 kprintf("%s: could not allocate AMRR xfer\n",
1954                     USBDEVNAME(sc->sc_dev));
1955                 goto fail;
1956         }
1957
1958         /*
1959          * Open Tx and Rx USB bulk pipes.
1960          */
1961         error = usbd_open_pipe(sc->sc_iface, sc->sc_tx_no, USBD_EXCLUSIVE_USE,
1962             &sc->sc_tx_pipeh);
1963         if (error != 0) {
1964                 kprintf("%s: could not open Tx pipe: %s\n",
1965                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
1966                 goto fail;
1967         }
1968
1969         error = usbd_open_pipe(sc->sc_iface, sc->sc_rx_no, USBD_EXCLUSIVE_USE,
1970             &sc->sc_rx_pipeh);
1971         if (error != 0) {
1972                 kprintf("%s: could not open Rx pipe: %s\n",
1973                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
1974                 goto fail;
1975         }
1976
1977         /*
1978          * Allocate Tx and Rx xfer queues.
1979          */
1980         error = rum_alloc_tx_list(sc);
1981         if (error != 0) {
1982                 kprintf("%s: could not allocate Tx list\n",
1983                     USBDEVNAME(sc->sc_dev));
1984                 goto fail;
1985         }
1986
1987         error = rum_alloc_rx_list(sc);
1988         if (error != 0) {
1989                 kprintf("%s: could not allocate Rx list\n",
1990                     USBDEVNAME(sc->sc_dev));
1991                 goto fail;
1992         }
1993
1994         /*
1995          * Start up the receive pipe.
1996          */
1997         for (i = 0; i < RT2573_RX_LIST_COUNT; i++) {
1998                 data = &sc->rx_data[i];
1999
2000                 usbd_setup_xfer(data->xfer, sc->sc_rx_pipeh, data, data->buf,
2001                     MCLBYTES, USBD_SHORT_XFER_OK, USBD_NO_TIMEOUT, rum_rxeof);
2002                 usbd_transfer(data->xfer);
2003         }
2004
2005         /* update Rx filter */
2006         tmp = rum_read(sc, RT2573_TXRX_CSR0) & 0xffff;
2007
2008         tmp |= RT2573_DROP_PHY_ERROR | RT2573_DROP_CRC_ERROR;
2009         if (ic->ic_opmode != IEEE80211_M_MONITOR) {
2010                 tmp |= RT2573_DROP_CTL | RT2573_DROP_VER_ERROR |
2011                        RT2573_DROP_ACKCTS;
2012                 if (ic->ic_opmode != IEEE80211_M_HOSTAP)
2013                         tmp |= RT2573_DROP_TODS;
2014                 if (!(ifp->if_flags & IFF_PROMISC))
2015                         tmp |= RT2573_DROP_NOT_TO_ME;
2016         }
2017         rum_write(sc, RT2573_TXRX_CSR0, tmp);
2018
2019         ifp->if_flags &= ~IFF_OACTIVE;
2020         ifp->if_flags |= IFF_RUNNING;
2021
2022         if (ic->ic_opmode == IEEE80211_M_MONITOR)
2023                 ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
2024         else
2025                 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
2026
2027         return;
2028
2029 fail:   rum_stop(sc);
2030
2031 #undef N
2032 }
2033
2034 Static void
2035 rum_stop(struct rum_softc *sc)
2036 {
2037         struct ieee80211com *ic = &sc->sc_ic;
2038         struct ifnet *ifp = &ic->ic_if;
2039         uint32_t tmp;
2040
2041         ASSERT_SERIALIZED(ifp->if_serializer);
2042
2043         ieee80211_new_state(ic, IEEE80211_S_INIT, -1);  /* free all nodes */
2044
2045         sc->sc_tx_timer = 0;
2046         ifp->if_timer = 0;
2047         ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
2048
2049         /* disable Rx */
2050         tmp = rum_read(sc, RT2573_TXRX_CSR0);
2051         rum_write(sc, RT2573_TXRX_CSR0, tmp | RT2573_DISABLE_RX);
2052
2053         /* reset ASIC */
2054         rum_write(sc, RT2573_MAC_CSR1, 3);
2055         rum_write(sc, RT2573_MAC_CSR1, 0);
2056
2057         if (sc->sc_rx_pipeh != NULL) {
2058                 usbd_abort_pipe(sc->sc_rx_pipeh);
2059                 usbd_close_pipe(sc->sc_rx_pipeh);
2060                 sc->sc_rx_pipeh = NULL;
2061         }
2062
2063         if (sc->sc_tx_pipeh != NULL) {
2064                 usbd_abort_pipe(sc->sc_tx_pipeh);
2065                 usbd_close_pipe(sc->sc_tx_pipeh);
2066                 sc->sc_tx_pipeh = NULL;
2067         }
2068
2069         rum_free_rx_list(sc);
2070         rum_free_tx_list(sc);
2071 }
2072
2073 Static int
2074 rum_load_microcode(struct rum_softc *sc, const uint8_t *ucode, size_t size)
2075 {
2076         usb_device_request_t req;
2077         uint16_t reg = RT2573_MCU_CODE_BASE;
2078         usbd_status error;
2079
2080         /* copy firmware image into NIC */
2081         for (; size >= 4; reg += 4, ucode += 4, size -= 4)
2082                 rum_write(sc, reg, UGETDW(ucode));
2083
2084         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
2085         req.bRequest = RT2573_MCU_CNTL;
2086         USETW(req.wValue, RT2573_MCU_RUN);
2087         USETW(req.wIndex, 0);
2088         USETW(req.wLength, 0);
2089
2090         error = usbd_do_request(sc->sc_udev, &req, NULL);
2091         if (error != 0) {
2092                 kprintf("%s: could not run firmware: %s\n",
2093                     USBDEVNAME(sc->sc_dev), usbd_errstr(error));
2094         }
2095         return error;
2096 }
2097
2098 Static int
2099 rum_prepare_beacon(struct rum_softc *sc)
2100 {
2101         struct ieee80211com *ic = &sc->sc_ic;
2102         struct ieee80211_beacon_offsets bo;
2103         struct rum_tx_desc desc;
2104         struct mbuf *m0;
2105         int rate;
2106
2107         m0 = ieee80211_beacon_alloc(ic, ic->ic_bss, &bo);
2108         if (m0 == NULL) {
2109                 if_printf(&ic->ic_if, "could not allocate beacon frame\n");
2110                 return ENOBUFS;
2111         }
2112
2113         /* send beacons at the lowest available rate */
2114         rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bss->ni_chan) ? 12 : 2;
2115
2116         rum_setup_tx_desc(sc, &desc, RT2573_TX_TIMESTAMP, RT2573_TX_HWSEQ,
2117             m0->m_pkthdr.len, rate);
2118
2119         /* copy the first 24 bytes of Tx descriptor into NIC memory */
2120         rum_write_multi(sc, RT2573_HW_BEACON_BASE0, (uint8_t *)&desc, 24);
2121
2122         /* copy beacon header and payload into NIC memory */
2123         rum_write_multi(sc, RT2573_HW_BEACON_BASE0 + 24, mtod(m0, uint8_t *),
2124             m0->m_pkthdr.len);
2125
2126         m_freem(m0);
2127
2128         return 0;
2129 }
2130
2131 Static void
2132 rum_stats_timeout(void *arg)
2133 {
2134         struct rum_softc *sc = arg;
2135         struct ifnet *ifp = &sc->sc_ic.ic_if;
2136         usb_device_request_t req;
2137
2138         lwkt_serialize_enter(ifp->if_serializer);
2139
2140         /*
2141          * Asynchronously read statistic registers (cleared by read).
2142          */
2143         req.bmRequestType = UT_READ_VENDOR_DEVICE;
2144         req.bRequest = RT2573_READ_MULTI_MAC;
2145         USETW(req.wValue, 0);
2146         USETW(req.wIndex, RT2573_STA_CSR0);
2147         USETW(req.wLength, sizeof(sc->sta));
2148
2149         usbd_setup_default_xfer(sc->stats_xfer, sc->sc_udev, sc,
2150                                 USBD_DEFAULT_TIMEOUT, &req,
2151                                 sc->sta, sizeof(sc->sta), 0,
2152                                 rum_stats_update);
2153         usbd_transfer(sc->stats_xfer);
2154
2155         lwkt_serialize_exit(ifp->if_serializer);
2156 }
2157
2158 Static void
2159 rum_stats_update(usbd_xfer_handle xfer, usbd_private_handle priv,
2160                  usbd_status status)
2161 {
2162         struct rum_softc *sc = (struct rum_softc *)priv;
2163         struct ifnet *ifp = &sc->sc_ic.ic_if;
2164         struct ieee80211_ratectl_stats *stats = &sc->sc_stats;
2165
2166         if (status != USBD_NORMAL_COMPLETION) {
2167                 kprintf("%s: could not retrieve Tx statistics - cancelling "
2168                     "automatic rate control\n", USBDEVNAME(sc->sc_dev));
2169                 return;
2170         }
2171
2172         lwkt_serialize_enter(ifp->if_serializer);
2173
2174         /* count TX retry-fail as Tx errors */
2175         ifp->if_oerrors += RUM_TX_PKT_FAIL(sc);
2176
2177         stats->stats_pkt_noretry += RUM_TX_PKT_NO_RETRY(sc);
2178         stats->stats_pkt_ok += RUM_TX_PKT_NO_RETRY(sc) +
2179                                RUM_TX_PKT_ONE_RETRY(sc) +
2180                                RUM_TX_PKT_MULTI_RETRY(sc);
2181         stats->stats_pkt_err += RUM_TX_PKT_FAIL(sc);
2182
2183         stats->stats_short_retries += RUM_TX_PKT_ONE_RETRY(sc);
2184 #if 1
2185         /*
2186          * XXX Estimated average:
2187          * Actual number of retries for each packet should belong to
2188          * [2, RUM_TX_SHORT_RETRY_MAX]
2189          */
2190         stats->stats_short_retries +=
2191                 RUM_TX_PKT_MULTI_RETRY(sc) *
2192                 ((2 + RUM_TX_SHORT_RETRY_MAX) / 2);
2193 #else
2194         stats->stats_short_retries += RUM_TX_PKT_MULTI_RETRY(sc);
2195 #endif
2196         stats->stats_short_retries +=
2197                 RUM_TX_PKT_FAIL(sc) * RUM_TX_SHORT_RETRY_MAX;
2198
2199         callout_reset(&sc->stats_ch, 4 * hz / 5, rum_stats_timeout, sc);
2200
2201         lwkt_serialize_exit(ifp->if_serializer);
2202 }
2203
2204 Static void
2205 rum_stats(struct ieee80211com *ic, struct ieee80211_node *ni __unused,
2206           struct ieee80211_ratectl_stats *stats)
2207 {
2208         struct ifnet *ifp = &ic->ic_if;
2209         struct rum_softc *sc = ifp->if_softc;
2210
2211         ASSERT_SERIALIZED(ifp->if_serializer);
2212
2213         bcopy(&sc->sc_stats, stats, sizeof(*stats));
2214         bzero(&sc->sc_stats, sizeof(sc->sc_stats));
2215 }
2216
2217 Static void
2218 rum_ratectl_change(struct ieee80211com *ic, u_int orc __unused, u_int nrc)
2219 {
2220         struct ieee80211_ratectl_state *st = &ic->ic_ratectl;
2221         struct ieee80211_onoe_param *oparam;
2222
2223         if (st->rc_st_param != NULL) {
2224                 kfree(st->rc_st_param, M_DEVBUF);
2225                 st->rc_st_param = NULL;
2226         }
2227
2228         switch (nrc) {
2229         case IEEE80211_RATECTL_ONOE:
2230                 oparam = kmalloc(sizeof(*oparam), M_DEVBUF, M_INTWAIT);
2231
2232                 IEEE80211_ONOE_PARAM_SETUP(oparam);
2233                 oparam->onoe_raise = 15;
2234
2235                 st->rc_st_param = oparam;
2236                 break;
2237         case IEEE80211_RATECTL_NONE:
2238                 /* This could only happen during detaching */
2239                 break;
2240         default:
2241                 panic("unknown rate control algo %u\n", nrc);
2242         }
2243 }
2244
2245 Static int
2246 rum_get_rssi(struct rum_softc *sc, uint8_t raw)
2247 {
2248         int lna, agc, rssi;
2249
2250         lna = (raw >> 5) & 0x3;
2251         agc = raw & 0x1f;
2252
2253         if (lna == 0) {
2254                 /*
2255                  * No RSSI mapping
2256                  *
2257                  * NB: Since RSSI is relative to noise floor, -1 is
2258                  *     adequate for caller to know error happened.
2259                  */
2260                 return -1;
2261         }
2262
2263         rssi = (2 * agc) - RT2573_NOISE_FLOOR;
2264
2265         if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) {
2266                 rssi += sc->rssi_2ghz_corr;
2267
2268                 if (lna == 1)
2269                         rssi -= 64;
2270                 else if (lna == 2)
2271                         rssi -= 74;
2272                 else if (lna == 3)
2273                         rssi -= 90;
2274         } else {
2275                 rssi += sc->rssi_5ghz_corr;
2276
2277                 if (!sc->ext_5ghz_lna && lna != 1)
2278                         rssi += 4;
2279
2280                 if (lna == 1)
2281                         rssi -= 64;
2282                 else if (lna == 2)
2283                         rssi -= 86;
2284                 else if (lna == 3)
2285                         rssi -= 100;
2286         }
2287         return rssi;
2288 }