sys/dev/usb/video/udl.c

   1 /*      $OpenBSD: udl.c,v 1.81 2014/12/09 07:05:06 doug Exp $ */
   2 /*      $FreeBSD$ */
   3
   4 /*-
   5  * Copyright (c) 2015 Hans Petter Selasky <hselasky@freebsd.org>
   6  * Copyright (c) 2009 Marcus Glocker <mglocker@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  * Driver for the "DisplayLink DL-120 / DL-160" graphic chips based on
  23  * the reversed engineered specifications of Florian Echtler
  24  * <floe@butterbrot.org>:
  25  *
  26  *      http://floe.butterbrot.org/displaylink/doku.php
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/bus.h>
  31 #include <sys/callout.h>
  32 #include <sys/conf.h>
  33 #include <sys/kernel.h>
  34 #include <sys/lock.h>
  35 #include <sys/module.h>
  36 #include <sys/mutex.h>
  37 #include <sys/condvar.h>
  38 #include <sys/sysctl.h>
  39 #include <sys/systm.h>
  40 #include <sys/consio.h>
  41 #include <sys/fbio.h>
  42
  43 #include <dev/fb/fbreg.h>
  44 #include <dev/syscons/syscons.h>
  45
  46 #include <dev/videomode/videomode.h>
  47 #include <dev/videomode/edidvar.h>
  48
  49 #include <dev/usb/usb.h>
  50 #include <dev/usb/usbdi.h>
  51 #include <dev/usb/usbdi_util.h>
  52 #include "usbdevs.h"
  53
  54 #include <dev/usb/video/udl.h>
  55
  56 #include "fb_if.h"
  57
  58 #undef DPRINTF
  59 #undef DPRINTFN
  60 #define USB_DEBUG_VAR udl_debug
  61 #include <dev/usb/usb_debug.h>
  62
  63 static  SYSCTL_NODE(_hw_usb, OID_AUTO, udl, CTLFLAG_RW, 0, "USB UDL");
  64
  65 #ifdef USB_DEBUG
  66 static int udl_debug = 0;
  67
  68 SYSCTL_INT(_hw_usb_udl, OID_AUTO, debug, CTLFLAG_RWTUN,
  69     &udl_debug, 0, "Debug level");
  70 #endif
  71
  72 #define UDL_FPS_MAX     60
  73 #define UDL_FPS_MIN     1
  74
  75 static int udl_fps = 25;
  76 SYSCTL_INT(_hw_usb_udl, OID_AUTO, fps, CTLFLAG_RWTUN,
  77     &udl_fps, 0, "Frames Per Second, 1-60");
  78
  79 static struct mtx udl_buffer_mtx;
  80 static struct udl_buffer_head udl_buffer_head;
  81
  82 MALLOC_DEFINE(M_USB_DL, "USB", "USB DisplayLink");
  83
  84 /*
  85  * Prototypes.
  86  */
  87 static usb_callback_t udl_bulk_write_callback;
  88
  89 static device_probe_t udl_probe;
  90 static device_attach_t udl_attach;
  91 static device_detach_t udl_detach;
  92 static fb_getinfo_t udl_fb_getinfo;
  93 static fb_setblankmode_t udl_fb_setblankmode;
  94
  95 static void udl_select_chip(struct udl_softc *, struct usb_attach_arg *);
  96 static int udl_init_chip(struct udl_softc *);
  97 static void udl_select_mode(struct udl_softc *);
  98 static int udl_init_resolution(struct udl_softc *);
  99 static void udl_fbmem_alloc(struct udl_softc *);
 100 static int udl_cmd_write_buf_le16(struct udl_softc *, const uint8_t *, uint32_t, uint8_t, int);
 101 static int udl_cmd_buf_copy_le16(struct udl_softc *, uint32_t, uint32_t, uint8_t, int);
 102 static void udl_cmd_insert_int_1(struct udl_cmd_buf *, uint8_t);
 103 static void udl_cmd_insert_int_3(struct udl_cmd_buf *, uint32_t);
 104 static void udl_cmd_insert_buf_le16(struct udl_cmd_buf *, const uint8_t *, uint32_t);
 105 static void udl_cmd_write_reg_1(struct udl_cmd_buf *, uint8_t, uint8_t);
 106 static void udl_cmd_write_reg_3(struct udl_cmd_buf *, uint8_t, uint32_t);
 107 static int udl_power_save(struct udl_softc *, int, int);
 108
 109 static const struct usb_config udl_config[UDL_N_TRANSFER] = {
 110         [UDL_BULK_WRITE_0] = {
 111                 .type = UE_BULK,
 112                 .endpoint = UE_ADDR_ANY,
 113                 .direction = UE_DIR_TX,
 114                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,.ext_buffer = 1,},
 115                 .bufsize = UDL_CMD_MAX_DATA_SIZE * UDL_CMD_MAX_FRAMES,
 116                 .callback = &udl_bulk_write_callback,
 117                 .frames = UDL_CMD_MAX_FRAMES,
 118                 .timeout = 5000,        /* 5 seconds */
 119         },
 120         [UDL_BULK_WRITE_1] = {
 121                 .type = UE_BULK,
 122                 .endpoint = UE_ADDR_ANY,
 123                 .direction = UE_DIR_TX,
 124                 .flags = {.pipe_bof = 1,.force_short_xfer = 1,.ext_buffer = 1,},
 125                 .bufsize = UDL_CMD_MAX_DATA_SIZE * UDL_CMD_MAX_FRAMES,
 126                 .callback = &udl_bulk_write_callback,
 127                 .frames = UDL_CMD_MAX_FRAMES,
 128                 .timeout = 5000,        /* 5 seconds */
 129         },
 130 };
 131
 132 /*
 133  * Driver glue.
 134  */
 135 static devclass_t udl_devclass;
 136
 137 static device_method_t udl_methods[] = {
 138         DEVMETHOD(device_probe, udl_probe),
 139         DEVMETHOD(device_attach, udl_attach),
 140         DEVMETHOD(device_detach, udl_detach),
 141         DEVMETHOD(fb_getinfo, udl_fb_getinfo),
 142         DEVMETHOD_END
 143 };
 144
 145 static driver_t udl_driver = {
 146         .name = "udl",
 147         .methods = udl_methods,
 148         .size = sizeof(struct udl_softc),
 149 };
 150
 151 DRIVER_MODULE(udl, uhub, udl_driver, udl_devclass, NULL, NULL);
 152 MODULE_DEPEND(udl, usb, 1, 1, 1);
 153 MODULE_DEPEND(udl, fbd, 1, 1, 1);
 154 MODULE_DEPEND(udl, videomode, 1, 1, 1);
 155 MODULE_VERSION(udl, 1);
 156
 157 /*
 158  * Matching devices.
 159  */
 160 static const STRUCT_USB_HOST_ID udl_devs[] = {
 161         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD4300U, DL120)},
 162         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD8000U, DL120)},
 163         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_GUC2020, DL160)},
 164         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LD220, DL165)},
 165         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VCUD60, DL160)},
 166         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DLDVI, DL160)},
 167         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VGA10, DL120)},
 168         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_WSDVI, DLUNK)},
 169         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_EC008, DL160)},
 170         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_HPDOCK, DL160)},
 171         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NL571, DL160)},
 172         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_M01061, DL195)},
 173         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NBDOCK, DL165)},
 174         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_SWDVI, DLUNK)},
 175         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_UM7X0, DL120)},
 176         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_CONV, DL160)},
 177         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_PLUGABLE, DL160)},
 178         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LUM70, DL125)},
 179         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_POLARIS2, DLUNK)},
 180         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LT1421, DLUNK)},
 181         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_ITEC, DL165)},
 182 };
 183
 184 static void
 185 udl_buffer_init(void *arg)
 186 {
 187         mtx_init(&udl_buffer_mtx, "USB", "UDL", MTX_DEF);
 188         TAILQ_INIT(&udl_buffer_head);
 189 }
 190 SYSINIT(udl_buffer_init, SI_SUB_LOCK, SI_ORDER_FIRST, udl_buffer_init, NULL);
 191
 192 CTASSERT(sizeof(struct udl_buffer) < PAGE_SIZE);
 193
 194 static void *
 195 udl_buffer_alloc(uint32_t size)
 196 {
 197         struct udl_buffer *buf;
 198         mtx_lock(&udl_buffer_mtx);
 199         TAILQ_FOREACH(buf, &udl_buffer_head, entry) {
 200                 if (buf->size == size) {
 201                         TAILQ_REMOVE(&udl_buffer_head, buf, entry);
 202                         break;
 203                 }
 204         }
 205         mtx_unlock(&udl_buffer_mtx);
 206         if (buf != NULL) {
 207                 uint8_t *ptr = ((uint8_t *)buf) - size;
 208                 /* wipe and recycle buffer */
 209                 memset(ptr, 0, size);
 210                 /* return buffer pointer */
 211                 return (ptr);
 212         }
 213         /* allocate new buffer */
 214         return (malloc(size + sizeof(*buf), M_USB_DL, M_WAITOK | M_ZERO));
 215 }
 216
 217 static void
 218 udl_buffer_free(void *_buf, uint32_t size)
 219 {
 220         struct udl_buffer *buf;
 221
 222         /* check for NULL pointer */
 223         if (_buf == NULL)
 224                 return;
 225         /* compute pointer to recycle list */
 226         buf = (struct udl_buffer *)(((uint8_t *)_buf) + size);
 227
 228         /*
 229          * Memory mapped buffers should never be freed.
 230          * Put display buffer into a recycle list.
 231          */
 232         mtx_lock(&udl_buffer_mtx);
 233         buf->size = size;
 234         TAILQ_INSERT_TAIL(&udl_buffer_head, buf, entry);
 235         mtx_unlock(&udl_buffer_mtx);
 236 }
 237
 238 static uint32_t
 239 udl_get_fb_size(struct udl_softc *sc)
 240 {
 241         unsigned i = sc->sc_cur_mode;
 242
 243         return ((uint32_t)udl_modes[i].hdisplay *
 244             (uint32_t)udl_modes[i].vdisplay * 2);
 245 }
 246
 247 static uint32_t
 248 udl_get_fb_width(struct udl_softc *sc)
 249 {
 250         unsigned i = sc->sc_cur_mode;
 251
 252         return (udl_modes[i].hdisplay);
 253 }
 254
 255 static uint32_t
 256 udl_get_fb_height(struct udl_softc *sc)
 257 {
 258         unsigned i = sc->sc_cur_mode;
 259
 260         return (udl_modes[i].vdisplay);
 261 }
 262
 263 static uint32_t
 264 udl_get_fb_hz(struct udl_softc *sc)
 265 {
 266         unsigned i = sc->sc_cur_mode;
 267
 268         return (udl_modes[i].hz);
 269 }
 270
 271 static void
 272 udl_callout(void *arg)
 273 {
 274         struct udl_softc *sc = arg;
 275         const uint32_t max = udl_get_fb_size(sc);
 276         int fps;
 277
 278         if (sc->sc_power_save == 0) {
 279                 fps = udl_fps;
 280
 281                 /* figure out number of frames per second */
 282                 if (fps < UDL_FPS_MIN)
 283                         fps = UDL_FPS_MIN;
 284                 else if (fps > UDL_FPS_MAX)
 285                         fps = UDL_FPS_MAX;
 286
 287                 if (sc->sc_sync_off >= max)
 288                         sc->sc_sync_off = 0;
 289                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 290                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 291         } else {
 292                 fps = 1;
 293         }
 294         callout_reset(&sc->sc_callout, hz / fps, &udl_callout, sc);
 295 }
 296
 297 static int
 298 udl_probe(device_t dev)
 299 {
 300         struct usb_attach_arg *uaa = device_get_ivars(dev);
 301
 302         if (uaa->usb_mode != USB_MODE_HOST)
 303                 return (ENXIO);
 304         if (uaa->info.bConfigIndex != 0)
 305                 return (ENXIO);
 306         if (uaa->info.bIfaceIndex != 0)
 307                 return (ENXIO);
 308
 309         return (usbd_lookup_id_by_uaa(udl_devs, sizeof(udl_devs), uaa));
 310 }
 311
 312 static int
 313 udl_attach(device_t dev)
 314 {
 315         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
 316         struct sysctl_oid *tree = device_get_sysctl_tree(dev);
 317         struct udl_softc *sc = device_get_softc(dev);
 318         struct usb_attach_arg *uaa = device_get_ivars(dev);
 319         int error;
 320         int i;
 321
 322         device_set_usb_desc(dev);
 323
 324         mtx_init(&sc->sc_mtx, "UDL lock", NULL, MTX_DEF);
 325         cv_init(&sc->sc_cv, "UDLCV");
 326         callout_init_mtx(&sc->sc_callout, &sc->sc_mtx, 0);
 327         sc->sc_udev = uaa->device;
 328
 329         error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
 330             sc->sc_xfer, udl_config, UDL_N_TRANSFER, sc, &sc->sc_mtx);
 331
 332         if (error) {
 333                 DPRINTF("usbd_transfer_setup error=%s\n", usbd_errstr(error));
 334                 goto detach;
 335         }
 336         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_0], &sc->sc_xfer_head[0]);
 337         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_1], &sc->sc_xfer_head[1]);
 338
 339         TAILQ_INIT(&sc->sc_xfer_head[0]);
 340         TAILQ_INIT(&sc->sc_xfer_head[1]);
 341         TAILQ_INIT(&sc->sc_cmd_buf_free);
 342         TAILQ_INIT(&sc->sc_cmd_buf_pending);
 343
 344         sc->sc_def_chip = -1;
 345         sc->sc_chip = USB_GET_DRIVER_INFO(uaa);
 346         sc->sc_def_mode = -1;
 347         sc->sc_cur_mode = UDL_MAX_MODES;
 348
 349         /* Allow chip ID to be overwritten */
 350         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid_force",
 351             CTLFLAG_RWTUN, &sc->sc_def_chip, 0, "chip ID");
 352
 353         /* Export current chip ID */
 354         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid",
 355             CTLFLAG_RD, &sc->sc_chip, 0, "chip ID");
 356
 357         if (sc->sc_def_chip > -1 && sc->sc_def_chip <= DLMAX) {
 358                 device_printf(dev, "Forcing chip ID to 0x%04x\n", sc->sc_def_chip);
 359                 sc->sc_chip = sc->sc_def_chip;
 360         }
 361         /*
 362          * The product might have more than one chip
 363          */
 364         if (sc->sc_chip == DLUNK)
 365                 udl_select_chip(sc, uaa);
 366
 367         for (i = 0; i != UDL_CMD_MAX_BUFFERS; i++) {
 368                 struct udl_cmd_buf *cb = &sc->sc_cmd_buf_temp[i];
 369
 370                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 371         }
 372
 373         /*
 374          * Initialize chip.
 375          */
 376         error = udl_init_chip(sc);
 377         if (error != USB_ERR_NORMAL_COMPLETION)
 378                 goto detach;
 379
 380         /*
 381          * Select edid mode.
 382          */
 383         udl_select_mode(sc);
 384
 385         /* Allow default mode to be overwritten */
 386         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode_force",
 387             CTLFLAG_RWTUN, &sc->sc_def_mode, 0, "mode");
 388
 389         /* Export current mode */
 390         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode",
 391             CTLFLAG_RD, &sc->sc_cur_mode, 0, "mode");
 392
 393         i = sc->sc_def_mode;
 394         if (i > -1 && i < UDL_MAX_MODES) {
 395                 if (udl_modes[i].chip <= sc->sc_chip) {
 396                         device_printf(dev, "Forcing mode to %d\n", i);
 397                         sc->sc_cur_mode = i;
 398                 }
 399         }
 400         /* Printout current mode */
 401         device_printf(dev, "Mode selected %dx%d @ %dHz\n",
 402             (int)udl_get_fb_width(sc),
 403             (int)udl_get_fb_height(sc),
 404             (int)udl_get_fb_hz(sc));
 405
 406         udl_init_resolution(sc);
 407
 408         /* Allocate frame buffer */
 409         udl_fbmem_alloc(sc);
 410
 411         UDL_LOCK(sc);
 412         udl_callout(sc);
 413         UDL_UNLOCK(sc);
 414
 415         sc->sc_fb_info.fb_name = device_get_nameunit(dev);
 416         sc->sc_fb_info.fb_size = sc->sc_fb_size;
 417         sc->sc_fb_info.fb_bpp = 16;
 418         sc->sc_fb_info.fb_depth = 16;
 419         sc->sc_fb_info.fb_width = udl_get_fb_width(sc);
 420         sc->sc_fb_info.fb_height = udl_get_fb_height(sc);
 421         sc->sc_fb_info.fb_stride = sc->sc_fb_info.fb_width * 2;
 422         sc->sc_fb_info.fb_pbase = 0;
 423         sc->sc_fb_info.fb_vbase = (uintptr_t)sc->sc_fb_addr;
 424         sc->sc_fb_info.fb_priv = sc;
 425         sc->sc_fb_info.setblankmode = &udl_fb_setblankmode;
 426
 427         sc->sc_fbdev = device_add_child(dev, "fbd", -1);
 428         if (sc->sc_fbdev == NULL)
 429                 goto detach;
 430         if (device_probe_and_attach(sc->sc_fbdev) != 0)
 431                 goto detach;
 432
 433         return (0);
 434
 435 detach:
 436         udl_detach(dev);
 437
 438         return (ENXIO);
 439 }
 440
 441 static int
 442 udl_detach(device_t dev)
 443 {
 444         struct udl_softc *sc = device_get_softc(dev);
 445
 446         /* delete all child devices */
 447         device_delete_children(dev);
 448
 449         UDL_LOCK(sc);
 450         sc->sc_gone = 1;
 451         callout_stop(&sc->sc_callout);
 452         UDL_UNLOCK(sc);
 453
 454         usbd_transfer_unsetup(sc->sc_xfer, UDL_N_TRANSFER);
 455
 456         callout_drain(&sc->sc_callout);
 457
 458         mtx_destroy(&sc->sc_mtx);
 459         cv_destroy(&sc->sc_cv);
 460
 461         /* put main framebuffer into a recycle list, if any */
 462         udl_buffer_free(sc->sc_fb_addr, sc->sc_fb_size);
 463
 464         /* free shadow framebuffer memory, if any */
 465         free(sc->sc_fb_copy, M_USB_DL);
 466
 467         return (0);
 468 }
 469
 470 static struct fb_info *
 471 udl_fb_getinfo(device_t dev)
 472 {
 473         struct udl_softc *sc = device_get_softc(dev);
 474
 475         return (&sc->sc_fb_info);
 476 }
 477
 478 static int
 479 udl_fb_setblankmode(void *arg, int mode)
 480 {
 481         struct udl_softc *sc = arg;
 482
 483         switch (mode) {
 484         case V_DISPLAY_ON:
 485                 udl_power_save(sc, 1, M_WAITOK);
 486                 break;
 487         case V_DISPLAY_BLANK:
 488                 udl_power_save(sc, 1, M_WAITOK);
 489                 if (sc->sc_fb_addr != 0) {
 490                         const uint32_t max = udl_get_fb_size(sc);
 491
 492                         memset((void *)sc->sc_fb_addr, 0, max);
 493                 }
 494                 break;
 495         case V_DISPLAY_STAND_BY:
 496         case V_DISPLAY_SUSPEND:
 497                 udl_power_save(sc, 0, M_WAITOK);
 498                 break;
 499         }
 500         return (0);
 501 }
 502
 503 static struct udl_cmd_buf *
 504 udl_cmd_buf_alloc_locked(struct udl_softc *sc, int flags)
 505 {
 506         struct udl_cmd_buf *cb;
 507
 508         while ((cb = TAILQ_FIRST(&sc->sc_cmd_buf_free)) == NULL) {
 509                 if (flags != M_WAITOK)
 510                         break;
 511                 cv_wait(&sc->sc_cv, &sc->sc_mtx);
 512         }
 513         if (cb != NULL) {
 514                 TAILQ_REMOVE(&sc->sc_cmd_buf_free, cb, entry);
 515                 cb->off = 0;
 516         }
 517         return (cb);
 518 }
 519
 520 static struct udl_cmd_buf *
 521 udl_cmd_buf_alloc(struct udl_softc *sc, int flags)
 522 {
 523         struct udl_cmd_buf *cb;
 524
 525         UDL_LOCK(sc);
 526         cb = udl_cmd_buf_alloc_locked(sc, flags);
 527         UDL_UNLOCK(sc);
 528         return (cb);
 529 }
 530
 531 static void
 532 udl_cmd_buf_send(struct udl_softc *sc, struct udl_cmd_buf *cb)
 533 {
 534         UDL_LOCK(sc);
 535         if (sc->sc_gone) {
 536                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 537         } else {
 538                 /* mark end of command stack */
 539                 udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 540                 udl_cmd_insert_int_1(cb, UDL_BULK_CMD_EOC);
 541
 542                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_pending, cb, entry);
 543                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 544                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 545         }
 546         UDL_UNLOCK(sc);
 547 }
 548
 549 static struct udl_cmd_buf *
 550 udl_fb_synchronize_locked(struct udl_softc *sc)
 551 {
 552         const uint32_t max = udl_get_fb_size(sc);
 553
 554         /* check if framebuffer is not ready */
 555         if (sc->sc_fb_addr == NULL ||
 556             sc->sc_fb_copy == NULL)
 557                 return (NULL);
 558
 559         while (sc->sc_sync_off < max) {
 560                 uint32_t delta = max - sc->sc_sync_off;
 561
 562                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
 563                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
 564                 if (bcmp(sc->sc_fb_addr + sc->sc_sync_off, sc->sc_fb_copy + sc->sc_sync_off, delta) != 0) {
 565                         struct udl_cmd_buf *cb;
 566
 567                         cb = udl_cmd_buf_alloc_locked(sc, M_NOWAIT);
 568                         if (cb == NULL)
 569                                 goto done;
 570                         memcpy(sc->sc_fb_copy + sc->sc_sync_off,
 571                             sc->sc_fb_addr + sc->sc_sync_off, delta);
 572                         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 573                         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
 574                         udl_cmd_insert_int_3(cb, sc->sc_sync_off);
 575                         udl_cmd_insert_int_1(cb, delta / 2);
 576                         udl_cmd_insert_buf_le16(cb, sc->sc_fb_copy + sc->sc_sync_off, delta);
 577                         sc->sc_sync_off += delta;
 578                         return (cb);
 579                 } else {
 580                         sc->sc_sync_off += delta;
 581                 }
 582         }
 583 done:
 584         return (NULL);
 585 }
 586
 587 static void
 588 udl_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
 589 {
 590         struct udl_softc *sc = usbd_xfer_softc(xfer);
 591         struct udl_cmd_head *phead = usbd_xfer_get_priv(xfer);
 592         struct udl_cmd_buf *cb;
 593         unsigned i;
 594
 595         switch (USB_GET_STATE(xfer)) {
 596         case USB_ST_TRANSFERRED:
 597                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 598         case USB_ST_SETUP:
 599 tr_setup:
 600                 for (i = 0; i != UDL_CMD_MAX_FRAMES; i++) {
 601                         cb = TAILQ_FIRST(&sc->sc_cmd_buf_pending);
 602                         if (cb == NULL) {
 603                                 cb = udl_fb_synchronize_locked(sc);
 604                                 if (cb == NULL)
 605                                         break;
 606                         } else {
 607                                 TAILQ_REMOVE(&sc->sc_cmd_buf_pending, cb, entry);
 608                         }
 609                         TAILQ_INSERT_TAIL(phead, cb, entry);
 610                         usbd_xfer_set_frame_data(xfer, i, cb->buf, cb->off);
 611                 }
 612                 if (i != 0) {
 613                         usbd_xfer_set_frames(xfer, i);
 614                         usbd_transfer_submit(xfer);
 615                 }
 616                 break;
 617         default:
 618                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 619                 if (error != USB_ERR_CANCELLED) {
 620                         /* try clear stall first */
 621                         usbd_xfer_set_stall(xfer);
 622                         goto tr_setup;
 623                 }
 624                 break;
 625         }
 626         /* wakeup any waiters */
 627         cv_signal(&sc->sc_cv);
 628 }
 629
 630 static int
 631 udl_power_save(struct udl_softc *sc, int on, int flags)
 632 {
 633         struct udl_cmd_buf *cb;
 634
 635         /* get new buffer */
 636         cb = udl_cmd_buf_alloc(sc, flags);
 637         if (cb == NULL)
 638                 return (EAGAIN);
 639
 640         DPRINTF("screen %s\n", on ? "ON" : "OFF");
 641
 642         sc->sc_power_save = on ? 0 : 1;
 643
 644         if (on)
 645                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
 646         else
 647                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_OFF);
 648
 649         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
 650         udl_cmd_buf_send(sc, cb);
 651         return (0);
 652 }
 653
 654 static int
 655 udl_ctrl_msg(struct udl_softc *sc, uint8_t rt, uint8_t r,
 656     uint16_t index, uint16_t value, uint8_t *buf, size_t len)
 657 {
 658         usb_device_request_t req;
 659         int error;
 660
 661         req.bmRequestType = rt;
 662         req.bRequest = r;
 663         USETW(req.wIndex, index);
 664         USETW(req.wValue, value);
 665         USETW(req.wLength, len);
 666
 667         error = usbd_do_request_flags(sc->sc_udev, NULL,
 668             &req, buf, 0, NULL, USB_DEFAULT_TIMEOUT);
 669
 670         DPRINTF("%s\n", usbd_errstr(error));
 671
 672         return (error);
 673 }
 674
 675 static int
 676 udl_poll(struct udl_softc *sc, uint32_t *buf)
 677 {
 678         uint32_t lbuf;
 679         int error;
 680
 681         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 682             UDL_CTRL_CMD_POLL, 0x0000, 0x0000, (uint8_t *)&lbuf, sizeof(lbuf));
 683         if (error == USB_ERR_NORMAL_COMPLETION)
 684                 *buf = le32toh(lbuf);
 685         return (error);
 686 }
 687
 688 static int
 689 udl_read_1(struct udl_softc *sc, uint16_t addr, uint8_t *buf)
 690 {
 691         uint8_t lbuf[1];
 692         int error;
 693
 694         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 695             UDL_CTRL_CMD_READ_1, addr, 0x0000, lbuf, 1);
 696         if (error == USB_ERR_NORMAL_COMPLETION)
 697                 *buf = *(uint8_t *)lbuf;
 698         return (error);
 699 }
 700
 701 static int
 702 udl_write_1(struct udl_softc *sc, uint16_t addr, uint8_t buf)
 703 {
 704         int error;
 705
 706         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 707             UDL_CTRL_CMD_WRITE_1, addr, 0x0000, &buf, 1);
 708         return (error);
 709 }
 710
 711 static int
 712 udl_read_edid(struct udl_softc *sc, uint8_t *buf)
 713 {
 714         uint8_t lbuf[64];
 715         uint16_t offset;
 716         int error;
 717
 718         offset = 0;
 719
 720         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 721             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 722         if (error != USB_ERR_NORMAL_COMPLETION)
 723                 goto fail;
 724         bcopy(lbuf + 1, buf + offset, 63);
 725         offset += 63;
 726
 727         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 728             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 729         if (error != USB_ERR_NORMAL_COMPLETION)
 730                 goto fail;
 731         bcopy(lbuf + 1, buf + offset, 63);
 732         offset += 63;
 733
 734         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 735             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 3);
 736         if (error != USB_ERR_NORMAL_COMPLETION)
 737                 goto fail;
 738         bcopy(lbuf + 1, buf + offset, 2);
 739 fail:
 740         return (error);
 741 }
 742
 743 static uint8_t
 744 udl_lookup_mode(uint16_t hdisplay, uint16_t vdisplay, uint8_t hz,
 745     uint16_t chip, uint32_t clock)
 746 {
 747         uint8_t idx;
 748
 749         /*
 750          * Check first if we have a matching mode with pixelclock
 751          */
 752         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 753                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 754                     (udl_modes[idx].vdisplay == vdisplay) &&
 755                     (udl_modes[idx].clock == clock) &&
 756                     (udl_modes[idx].chip <= chip)) {
 757                         return (idx);
 758                 }
 759         }
 760
 761         /*
 762          * If not, check for matching mode with update frequency
 763          */
 764         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 765                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 766                     (udl_modes[idx].vdisplay == vdisplay) &&
 767                     (udl_modes[idx].hz == hz) &&
 768                     (udl_modes[idx].chip <= chip)) {
 769                         return (idx);
 770                 }
 771         }
 772         return (idx);
 773 }
 774
 775 static void
 776 udl_select_chip(struct udl_softc *sc, struct usb_attach_arg *uaa)
 777 {
 778         const char *pserial;
 779
 780         pserial = usb_get_serial(uaa->device);
 781
 782         sc->sc_chip = DL120;
 783
 784         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 785             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_WSDVI)) {
 786
 787                 /*
 788                  * WS Tech DVI is DL120 or DL160. All deviced uses the
 789                  * same revision (0.04) so iSerialNumber must be used
 790                  * to determin which chip it is.
 791                  */
 792
 793                 if (strlen(pserial) > 7) {
 794                         if (strncmp(pserial, "0198-13", 7) == 0)
 795                                 sc->sc_chip = DL160;
 796                 }
 797                 DPRINTF("iSerialNumber (%s) used to select chip (%d)\n",
 798                     pserial, sc->sc_chip);
 799         }
 800         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 801             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_SWDVI)) {
 802
 803                 /*
 804                  * SUNWEIT DVI is DL160, DL125, DL165 or DL195. Major revision
 805                  * can be used to differ between DL1x0 and DL1x5. Minor to
 806                  * differ between DL1x5. iSerialNumber seems not to be uniqe.
 807                  */
 808
 809                 sc->sc_chip = DL160;
 810
 811                 if (uaa->info.bcdDevice >= 0x100) {
 812                         sc->sc_chip = DL165;
 813                         if (uaa->info.bcdDevice == 0x104)
 814                                 sc->sc_chip = DL195;
 815                         if (uaa->info.bcdDevice == 0x108)
 816                                 sc->sc_chip = DL125;
 817                 }
 818                 DPRINTF("bcdDevice (%02x) used to select chip (%d)\n",
 819                     uaa->info.bcdDevice, sc->sc_chip);
 820         }
 821 }
 822
 823 static int
 824 udl_set_enc_key(struct udl_softc *sc, uint8_t *buf, uint8_t len)
 825 {
 826         int error;
 827
 828         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 829             UDL_CTRL_CMD_SET_KEY, 0x0000, 0x0000, buf, len);
 830         return (error);
 831 }
 832
 833 static void
 834 udl_fbmem_alloc(struct udl_softc *sc)
 835 {
 836         uint32_t size;
 837
 838         size = udl_get_fb_size(sc);
 839         size = round_page(size);
 840         /* check for zero size */
 841         if (size == 0)
 842                 size = PAGE_SIZE;
 843         /*
 844          * It is assumed that allocations above PAGE_SIZE bytes will
 845          * be PAGE_SIZE aligned for use with mmap()
 846          */
 847         sc->sc_fb_addr = udl_buffer_alloc(size);
 848         sc->sc_fb_copy = malloc(size, M_USB_DL, M_WAITOK | M_ZERO);
 849         sc->sc_fb_size = size;
 850 }
 851
 852 static void
 853 udl_cmd_insert_int_1(struct udl_cmd_buf *cb, uint8_t value)
 854 {
 855
 856         cb->buf[cb->off] = value;
 857         cb->off += 1;
 858 }
 859
 860 #if 0
 861 static void
 862 udl_cmd_insert_int_2(struct udl_cmd_buf *cb, uint16_t value)
 863 {
 864         uint16_t lvalue;
 865
 866         lvalue = htobe16(value);
 867         bcopy(&lvalue, cb->buf + cb->off, 2);
 868
 869         cb->off += 2;
 870 }
 871
 872 #endif
 873
 874 static void
 875 udl_cmd_insert_int_3(struct udl_cmd_buf *cb, uint32_t value)
 876 {
 877         uint32_t lvalue;
 878
 879 #if BYTE_ORDER == BIG_ENDIAN
 880         lvalue = htobe32(value) << 8;
 881 #else
 882         lvalue = htobe32(value) >> 8;
 883 #endif
 884         bcopy(&lvalue, cb->buf + cb->off, 3);
 885
 886         cb->off += 3;
 887 }
 888
 889 #if 0
 890 static void
 891 udl_cmd_insert_int_4(struct udl_cmd_buf *cb, uint32_t value)
 892 {
 893         uint32_t lvalue;
 894
 895         lvalue = htobe32(value);
 896         bcopy(&lvalue, cb->buf + cb->off, 4);
 897
 898         cb->off += 4;
 899 }
 900
 901 #endif
 902
 903 static void
 904 udl_cmd_insert_buf_le16(struct udl_cmd_buf *cb, const uint8_t *buf, uint32_t len)
 905 {
 906         uint32_t x;
 907
 908         for (x = 0; x != len; x += 2) {
 909                 /* byte swap from little endian to big endian */
 910                 cb->buf[cb->off + x + 0] = buf[x + 1];
 911                 cb->buf[cb->off + x + 1] = buf[x + 0];
 912         }
 913         cb->off += len;
 914 }
 915
 916 static void
 917 udl_cmd_write_reg_1(struct udl_cmd_buf *cb, uint8_t reg, uint8_t val)
 918 {
 919
 920         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 921         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_REG_WRITE_1);
 922         udl_cmd_insert_int_1(cb, reg);
 923         udl_cmd_insert_int_1(cb, val);
 924 }
 925
 926 static void
 927 udl_cmd_write_reg_3(struct udl_cmd_buf *cb, uint8_t reg, uint32_t val)
 928 {
 929
 930         udl_cmd_write_reg_1(cb, reg + 0, (val >> 16) & 0xff);
 931         udl_cmd_write_reg_1(cb, reg + 1, (val >> 8) & 0xff);
 932         udl_cmd_write_reg_1(cb, reg + 2, (val >> 0) & 0xff);
 933 }
 934
 935 static int
 936 udl_init_chip(struct udl_softc *sc)
 937 {
 938         uint32_t ui32;
 939         uint8_t ui8;
 940         int error;
 941
 942         error = udl_poll(sc, &ui32);
 943         if (error != USB_ERR_NORMAL_COMPLETION)
 944                 return (error);
 945         DPRINTF("poll=0x%08x\n", ui32);
 946
 947         /* Some products may use later chip too */
 948         switch (ui32 & 0xff) {
 949         case 0xf1:                      /* DL1x5 */
 950                 switch (sc->sc_chip) {
 951                 case DL120:
 952                         sc->sc_chip = DL125;
 953                         break;
 954                 case DL160:
 955                         sc->sc_chip = DL165;
 956                         break;
 957                 }
 958                 break;
 959         }
 960         DPRINTF("chip 0x%04x\n", sc->sc_chip);
 961
 962         error = udl_read_1(sc, 0xc484, &ui8);
 963         if (error != USB_ERR_NORMAL_COMPLETION)
 964                 return (error);
 965         DPRINTF("read 0x%02x from 0xc484\n", ui8);
 966
 967         error = udl_write_1(sc, 0xc41f, 0x01);
 968         if (error != USB_ERR_NORMAL_COMPLETION)
 969                 return (error);
 970         DPRINTF("write 0x01 to 0xc41f\n");
 971
 972         error = udl_read_edid(sc, sc->sc_edid);
 973         if (error != USB_ERR_NORMAL_COMPLETION)
 974                 return (error);
 975         DPRINTF("read EDID\n");
 976
 977         error = udl_set_enc_key(sc, __DECONST(void *, udl_null_key_1),
 978             sizeof(udl_null_key_1));
 979         if (error != USB_ERR_NORMAL_COMPLETION)
 980                 return (error);
 981         DPRINTF("set encryption key\n");
 982
 983         error = udl_write_1(sc, 0xc40b, 0x00);
 984         if (error != USB_ERR_NORMAL_COMPLETION)
 985                 return (error);
 986         DPRINTF("write 0x00 to 0xc40b\n");
 987
 988         return (USB_ERR_NORMAL_COMPLETION);
 989 }
 990
 991 static void
 992 udl_init_fb_offsets(struct udl_cmd_buf *cb, uint32_t start16, uint32_t stride16,
 993     uint32_t start8, uint32_t stride8)
 994 {
 995         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
 996         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START16, start16);
 997         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE16, stride16);
 998         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START8, start8);
 999         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE8, stride8);
1000         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1001 }
1002
1003 static int
1004 udl_init_resolution(struct udl_softc *sc)
1005 {
1006         const uint32_t max = udl_get_fb_size(sc);
1007         const uint8_t *buf = udl_modes[sc->sc_cur_mode].mode;
1008         struct udl_cmd_buf *cb;
1009         uint32_t delta;
1010         uint32_t i;
1011         int error;
1012
1013         /* get new buffer */
1014         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1015         if (cb == NULL)
1016                 return (EAGAIN);
1017
1018         /* write resolution values and set video memory offsets */
1019         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
1020         for (i = 0; i < UDL_MODE_SIZE; i++)
1021                 udl_cmd_write_reg_1(cb, i, buf[i]);
1022         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1023
1024         udl_init_fb_offsets(cb, 0x000000, 0x000a00, 0x555555, 0x000500);
1025         udl_cmd_buf_send(sc, cb);
1026
1027         /* fill screen with black color */
1028         for (i = 0; i < max; i += delta) {
1029                 static const uint8_t udl_black[UDL_CMD_MAX_PIXEL_COUNT * 2] __aligned(4);
1030
1031                 delta = max - i;
1032                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
1033                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
1034                 if (i == 0)
1035                         error = udl_cmd_write_buf_le16(sc, udl_black, i, delta / 2, M_WAITOK);
1036                 else
1037                         error = udl_cmd_buf_copy_le16(sc, 0, i, delta / 2, M_WAITOK);
1038                 if (error)
1039                         return (error);
1040         }
1041
1042         /* get new buffer */
1043         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1044         if (cb == NULL)
1045                 return (EAGAIN);
1046
1047         /* show framebuffer content */
1048         udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
1049         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1050         udl_cmd_buf_send(sc, cb);
1051         return (0);
1052 }
1053
1054 static void
1055 udl_select_mode(struct udl_softc *sc)
1056 {
1057         struct udl_mode mode;
1058         int index = UDL_MAX_MODES;
1059         int i;
1060
1061         /* try to get the preferred mode from EDID */
1062         edid_parse(sc->sc_edid, &sc->sc_edid_info);
1063 #ifdef USB_DEBUG
1064         edid_print(&sc->sc_edid_info);
1065 #endif
1066         if (sc->sc_edid_info.edid_preferred_mode != NULL) {
1067                 mode.hz =
1068                     (sc->sc_edid_info.edid_preferred_mode->dot_clock * 1000) /
1069                     (sc->sc_edid_info.edid_preferred_mode->htotal *
1070                     sc->sc_edid_info.edid_preferred_mode->vtotal);
1071                 mode.clock =
1072                     sc->sc_edid_info.edid_preferred_mode->dot_clock / 10;
1073                 mode.hdisplay =
1074                     sc->sc_edid_info.edid_preferred_mode->hdisplay;
1075                 mode.vdisplay =
1076                     sc->sc_edid_info.edid_preferred_mode->vdisplay;
1077                 index = udl_lookup_mode(mode.hdisplay, mode.vdisplay, mode.hz,
1078                     sc->sc_chip, mode.clock);
1079                 sc->sc_cur_mode = index;
1080         } else {
1081                 DPRINTF("no preferred mode found!\n");
1082         }
1083
1084         if (index == UDL_MAX_MODES) {
1085                 DPRINTF("no mode line found\n");
1086
1087                 i = 0;
1088                 while (i < sc->sc_edid_info.edid_nmodes) {
1089                         mode.hz =
1090                             (sc->sc_edid_info.edid_modes[i].dot_clock * 1000) /
1091                             (sc->sc_edid_info.edid_modes[i].htotal *
1092                             sc->sc_edid_info.edid_modes[i].vtotal);
1093                         mode.clock =
1094                             sc->sc_edid_info.edid_modes[i].dot_clock / 10;
1095                         mode.hdisplay =
1096                             sc->sc_edid_info.edid_modes[i].hdisplay;
1097                         mode.vdisplay =
1098                             sc->sc_edid_info.edid_modes[i].vdisplay;
1099                         index = udl_lookup_mode(mode.hdisplay, mode.vdisplay,
1100                             mode.hz, sc->sc_chip, mode.clock);
1101                         if (index < UDL_MAX_MODES)
1102                                 if ((sc->sc_cur_mode == UDL_MAX_MODES) ||
1103                                     (index > sc->sc_cur_mode))
1104                                         sc->sc_cur_mode = index;
1105                         i++;
1106                 }
1107         }
1108         /*
1109          * If no mode found use default.
1110          */
1111         if (sc->sc_cur_mode == UDL_MAX_MODES)
1112                 sc->sc_cur_mode = udl_lookup_mode(800, 600, 60, sc->sc_chip, 0);
1113 }
1114
1115 static int
1116 udl_cmd_write_buf_le16(struct udl_softc *sc, const uint8_t *buf, uint32_t off,
1117     uint8_t pixels, int flags)
1118 {
1119         struct udl_cmd_buf *cb;
1120
1121         cb = udl_cmd_buf_alloc(sc, flags);
1122         if (cb == NULL)
1123                 return (EAGAIN);
1124
1125         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1126         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
1127         udl_cmd_insert_int_3(cb, off);
1128         udl_cmd_insert_int_1(cb, pixels);
1129         udl_cmd_insert_buf_le16(cb, buf, 2 * pixels);
1130         udl_cmd_buf_send(sc, cb);
1131
1132         return (0);
1133 }
1134
1135 static int
1136 udl_cmd_buf_copy_le16(struct udl_softc *sc, uint32_t src, uint32_t dst,
1137     uint8_t pixels, int flags)
1138 {
1139         struct udl_cmd_buf *cb;
1140
1141         cb = udl_cmd_buf_alloc(sc, flags);
1142         if (cb == NULL)
1143                 return (EAGAIN);
1144
1145         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1146         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_COPY | UDL_BULK_CMD_FB_WORD);
1147         udl_cmd_insert_int_3(cb, dst);
1148         udl_cmd_insert_int_1(cb, pixels);
1149         udl_cmd_insert_int_3(cb, src);
1150         udl_cmd_buf_send(sc, cb);
1151
1152         return (0);
1153 }