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 };
 182
 183 static void
 184 udl_buffer_init(void *arg)
 185 {
 186         mtx_init(&udl_buffer_mtx, "USB", "UDL", MTX_DEF);
 187         TAILQ_INIT(&udl_buffer_head);
 188 }
 189 SYSINIT(udl_buffer_init, SI_SUB_LOCK, SI_ORDER_FIRST, udl_buffer_init, NULL);
 190
 191 CTASSERT(sizeof(struct udl_buffer) < PAGE_SIZE);
 192
 193 static void *
 194 udl_buffer_alloc(uint32_t size)
 195 {
 196         struct udl_buffer *buf;
 197         mtx_lock(&udl_buffer_mtx);
 198         TAILQ_FOREACH(buf, &udl_buffer_head, entry) {
 199                 if (buf->size == size) {
 200                         TAILQ_REMOVE(&udl_buffer_head, buf, entry);
 201                         break;
 202                 }
 203         }
 204         mtx_unlock(&udl_buffer_mtx);
 205         if (buf != NULL) {
 206                 uint8_t *ptr = ((uint8_t *)buf) - size;
 207                 /* wipe and recycle buffer */
 208                 memset(ptr, 0, size);
 209                 /* return buffer pointer */
 210                 return (ptr);
 211         }
 212         /* allocate new buffer */
 213         return (malloc(size + sizeof(*buf), M_USB_DL, M_WAITOK | M_ZERO));
 214 }
 215
 216 static void
 217 udl_buffer_free(void *_buf, uint32_t size)
 218 {
 219         struct udl_buffer *buf;
 220
 221         /* check for NULL pointer */
 222         if (_buf == NULL)
 223                 return;
 224         /* compute pointer to recycle list */
 225         buf = (struct udl_buffer *)(((uint8_t *)_buf) + size);
 226
 227         /*
 228          * Memory mapped buffers should never be freed.
 229          * Put display buffer into a recycle list.
 230          */
 231         mtx_lock(&udl_buffer_mtx);
 232         buf->size = size;
 233         TAILQ_INSERT_TAIL(&udl_buffer_head, buf, entry);
 234         mtx_unlock(&udl_buffer_mtx);
 235 }
 236
 237 static uint32_t
 238 udl_get_fb_size(struct udl_softc *sc)
 239 {
 240         unsigned i = sc->sc_cur_mode;
 241
 242         return ((uint32_t)udl_modes[i].hdisplay *
 243             (uint32_t)udl_modes[i].vdisplay * 2);
 244 }
 245
 246 static uint32_t
 247 udl_get_fb_width(struct udl_softc *sc)
 248 {
 249         unsigned i = sc->sc_cur_mode;
 250
 251         return (udl_modes[i].hdisplay);
 252 }
 253
 254 static uint32_t
 255 udl_get_fb_height(struct udl_softc *sc)
 256 {
 257         unsigned i = sc->sc_cur_mode;
 258
 259         return (udl_modes[i].vdisplay);
 260 }
 261
 262 static uint32_t
 263 udl_get_fb_hz(struct udl_softc *sc)
 264 {
 265         unsigned i = sc->sc_cur_mode;
 266
 267         return (udl_modes[i].hz);
 268 }
 269
 270 static void
 271 udl_callout(void *arg)
 272 {
 273         struct udl_softc *sc = arg;
 274         const uint32_t max = udl_get_fb_size(sc);
 275         int fps;
 276
 277         if (sc->sc_power_save == 0) {
 278                 fps = udl_fps;
 279
 280                 /* figure out number of frames per second */
 281                 if (fps < UDL_FPS_MIN)
 282                         fps = UDL_FPS_MIN;
 283                 else if (fps > UDL_FPS_MAX)
 284                         fps = UDL_FPS_MAX;
 285
 286                 if (sc->sc_sync_off >= max)
 287                         sc->sc_sync_off = 0;
 288                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 289                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 290         } else {
 291                 fps = 1;
 292         }
 293         callout_reset(&sc->sc_callout, hz / fps, &udl_callout, sc);
 294 }
 295
 296 static int
 297 udl_probe(device_t dev)
 298 {
 299         struct usb_attach_arg *uaa = device_get_ivars(dev);
 300
 301         if (uaa->usb_mode != USB_MODE_HOST)
 302                 return (ENXIO);
 303         if (uaa->info.bConfigIndex != 0)
 304                 return (ENXIO);
 305         if (uaa->info.bIfaceIndex != 0)
 306                 return (ENXIO);
 307
 308         return (usbd_lookup_id_by_uaa(udl_devs, sizeof(udl_devs), uaa));
 309 }
 310
 311 static int
 312 udl_attach(device_t dev)
 313 {
 314         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
 315         struct sysctl_oid *tree = device_get_sysctl_tree(dev);
 316         struct udl_softc *sc = device_get_softc(dev);
 317         struct usb_attach_arg *uaa = device_get_ivars(dev);
 318         int error;
 319         int i;
 320
 321         device_set_usb_desc(dev);
 322
 323         mtx_init(&sc->sc_mtx, "UDL lock", NULL, MTX_DEF);
 324         cv_init(&sc->sc_cv, "UDLCV");
 325         callout_init_mtx(&sc->sc_callout, &sc->sc_mtx, 0);
 326         sc->sc_udev = uaa->device;
 327
 328         error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
 329             sc->sc_xfer, udl_config, UDL_N_TRANSFER, sc, &sc->sc_mtx);
 330
 331         if (error) {
 332                 DPRINTF("usbd_transfer_setup error=%s\n", usbd_errstr(error));
 333                 goto detach;
 334         }
 335         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_0], &sc->sc_xfer_head[0]);
 336         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_1], &sc->sc_xfer_head[1]);
 337
 338         TAILQ_INIT(&sc->sc_xfer_head[0]);
 339         TAILQ_INIT(&sc->sc_xfer_head[1]);
 340         TAILQ_INIT(&sc->sc_cmd_buf_free);
 341         TAILQ_INIT(&sc->sc_cmd_buf_pending);
 342
 343         sc->sc_def_chip = -1;
 344         sc->sc_chip = USB_GET_DRIVER_INFO(uaa);
 345         sc->sc_def_mode = -1;
 346         sc->sc_cur_mode = UDL_MAX_MODES;
 347
 348         /* Allow chip ID to be overwritten */
 349         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid_force",
 350             CTLFLAG_RWTUN, &sc->sc_def_chip, 0, "chip ID");
 351
 352         /* Export current chip ID */
 353         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid",
 354             CTLFLAG_RD, &sc->sc_chip, 0, "chip ID");
 355
 356         if (sc->sc_def_chip > -1 && sc->sc_def_chip <= DLMAX) {
 357                 device_printf(dev, "Forcing chip ID to 0x%04x\n", sc->sc_def_chip);
 358                 sc->sc_chip = sc->sc_def_chip;
 359         }
 360         /*
 361          * The product might have more than one chip
 362          */
 363         if (sc->sc_chip == DLUNK)
 364                 udl_select_chip(sc, uaa);
 365
 366         for (i = 0; i != UDL_CMD_MAX_BUFFERS; i++) {
 367                 struct udl_cmd_buf *cb = &sc->sc_cmd_buf_temp[i];
 368
 369                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 370         }
 371
 372         /*
 373          * Initialize chip.
 374          */
 375         error = udl_init_chip(sc);
 376         if (error != USB_ERR_NORMAL_COMPLETION)
 377                 goto detach;
 378
 379         /*
 380          * Select edid mode.
 381          */
 382         udl_select_mode(sc);
 383
 384         /* Allow default mode to be overwritten */
 385         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode_force",
 386             CTLFLAG_RWTUN, &sc->sc_def_mode, 0, "mode");
 387
 388         /* Export current mode */
 389         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode",
 390             CTLFLAG_RD, &sc->sc_cur_mode, 0, "mode");
 391
 392         i = sc->sc_def_mode;
 393         if (i > -1 && i < UDL_MAX_MODES) {
 394                 if (udl_modes[i].chip <= sc->sc_chip) {
 395                         device_printf(dev, "Forcing mode to %d\n", i);
 396                         sc->sc_cur_mode = i;
 397                 }
 398         }
 399         /* Printout current mode */
 400         device_printf(dev, "Mode selected %dx%d @ %dHz\n",
 401             (int)udl_get_fb_width(sc),
 402             (int)udl_get_fb_height(sc),
 403             (int)udl_get_fb_hz(sc));
 404
 405         udl_init_resolution(sc);
 406
 407         /* Allocate frame buffer */
 408         udl_fbmem_alloc(sc);
 409
 410         UDL_LOCK(sc);
 411         udl_callout(sc);
 412         UDL_UNLOCK(sc);
 413
 414         sc->sc_fb_info.fb_name = device_get_nameunit(dev);
 415         sc->sc_fb_info.fb_size = sc->sc_fb_size;
 416         sc->sc_fb_info.fb_bpp = 16;
 417         sc->sc_fb_info.fb_depth = 16;
 418         sc->sc_fb_info.fb_width = udl_get_fb_width(sc);
 419         sc->sc_fb_info.fb_height = udl_get_fb_height(sc);
 420         sc->sc_fb_info.fb_stride = sc->sc_fb_info.fb_width * 2;
 421         sc->sc_fb_info.fb_pbase = 0;
 422         sc->sc_fb_info.fb_vbase = (uintptr_t)sc->sc_fb_addr;
 423         sc->sc_fb_info.fb_priv = sc;
 424         sc->sc_fb_info.setblankmode = &udl_fb_setblankmode;
 425
 426         sc->sc_fbdev = device_add_child(dev, "fbd", -1);
 427         if (sc->sc_fbdev == NULL)
 428                 goto detach;
 429         if (device_probe_and_attach(sc->sc_fbdev) != 0)
 430                 goto detach;
 431
 432         return (0);
 433
 434 detach:
 435         udl_detach(dev);
 436
 437         return (ENXIO);
 438 }
 439
 440 static int
 441 udl_detach(device_t dev)
 442 {
 443         struct udl_softc *sc = device_get_softc(dev);
 444
 445         if (sc->sc_fbdev != NULL) {
 446                 device_t bdev;
 447
 448                 bdev = sc->sc_fbdev;
 449                 sc->sc_fbdev = NULL;
 450                 device_detach(bdev);
 451                 device_delete_child(dev, bdev);
 452         }
 453         UDL_LOCK(sc);
 454         sc->sc_gone = 1;
 455         callout_stop(&sc->sc_callout);
 456         UDL_UNLOCK(sc);
 457
 458         usbd_transfer_unsetup(sc->sc_xfer, UDL_N_TRANSFER);
 459
 460         callout_drain(&sc->sc_callout);
 461
 462         mtx_destroy(&sc->sc_mtx);
 463         cv_destroy(&sc->sc_cv);
 464
 465         /* put main framebuffer into a recycle list, if any */
 466         udl_buffer_free(sc->sc_fb_addr, sc->sc_fb_size);
 467
 468         /* free shadow framebuffer memory, if any */
 469         free(sc->sc_fb_copy, M_USB_DL);
 470
 471         return (0);
 472 }
 473
 474 static struct fb_info *
 475 udl_fb_getinfo(device_t dev)
 476 {
 477         struct udl_softc *sc = device_get_softc(dev);
 478
 479         return (&sc->sc_fb_info);
 480 }
 481
 482 static int
 483 udl_fb_setblankmode(void *arg, int mode)
 484 {
 485         struct udl_softc *sc = arg;
 486
 487         switch (mode) {
 488         case V_DISPLAY_ON:
 489                 udl_power_save(sc, 1, M_WAITOK);
 490                 break;
 491         case V_DISPLAY_BLANK:
 492                 udl_power_save(sc, 1, M_WAITOK);
 493                 if (sc->sc_fb_addr != 0) {
 494                         const uint32_t max = udl_get_fb_size(sc);
 495
 496                         memset((void *)sc->sc_fb_addr, 0, max);
 497                 }
 498                 break;
 499         case V_DISPLAY_STAND_BY:
 500         case V_DISPLAY_SUSPEND:
 501                 udl_power_save(sc, 0, M_WAITOK);
 502                 break;
 503         }
 504         return (0);
 505 }
 506
 507 static struct udl_cmd_buf *
 508 udl_cmd_buf_alloc_locked(struct udl_softc *sc, int flags)
 509 {
 510         struct udl_cmd_buf *cb;
 511
 512         while ((cb = TAILQ_FIRST(&sc->sc_cmd_buf_free)) == NULL) {
 513                 if (flags != M_WAITOK)
 514                         break;
 515                 cv_wait(&sc->sc_cv, &sc->sc_mtx);
 516         }
 517         if (cb != NULL) {
 518                 TAILQ_REMOVE(&sc->sc_cmd_buf_free, cb, entry);
 519                 cb->off = 0;
 520         }
 521         return (cb);
 522 }
 523
 524 static struct udl_cmd_buf *
 525 udl_cmd_buf_alloc(struct udl_softc *sc, int flags)
 526 {
 527         struct udl_cmd_buf *cb;
 528
 529         UDL_LOCK(sc);
 530         cb = udl_cmd_buf_alloc_locked(sc, flags);
 531         UDL_UNLOCK(sc);
 532         return (cb);
 533 }
 534
 535 static void
 536 udl_cmd_buf_send(struct udl_softc *sc, struct udl_cmd_buf *cb)
 537 {
 538         UDL_LOCK(sc);
 539         if (sc->sc_gone) {
 540                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 541         } else {
 542                 /* mark end of command stack */
 543                 udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 544                 udl_cmd_insert_int_1(cb, UDL_BULK_CMD_EOC);
 545
 546                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_pending, cb, entry);
 547                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 548                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 549         }
 550         UDL_UNLOCK(sc);
 551 }
 552
 553 static struct udl_cmd_buf *
 554 udl_fb_synchronize_locked(struct udl_softc *sc)
 555 {
 556         const uint32_t max = udl_get_fb_size(sc);
 557
 558         /* check if framebuffer is not ready */
 559         if (sc->sc_fb_addr == NULL ||
 560             sc->sc_fb_copy == NULL)
 561                 return (NULL);
 562
 563         while (sc->sc_sync_off < max) {
 564                 uint32_t delta = max - sc->sc_sync_off;
 565
 566                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
 567                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
 568                 if (bcmp(sc->sc_fb_addr + sc->sc_sync_off, sc->sc_fb_copy + sc->sc_sync_off, delta) != 0) {
 569                         struct udl_cmd_buf *cb;
 570
 571                         cb = udl_cmd_buf_alloc_locked(sc, M_NOWAIT);
 572                         if (cb == NULL)
 573                                 goto done;
 574                         memcpy(sc->sc_fb_copy + sc->sc_sync_off,
 575                             sc->sc_fb_addr + sc->sc_sync_off, delta);
 576                         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 577                         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
 578                         udl_cmd_insert_int_3(cb, sc->sc_sync_off);
 579                         udl_cmd_insert_int_1(cb, delta / 2);
 580                         udl_cmd_insert_buf_le16(cb, sc->sc_fb_copy + sc->sc_sync_off, delta);
 581                         sc->sc_sync_off += delta;
 582                         return (cb);
 583                 } else {
 584                         sc->sc_sync_off += delta;
 585                 }
 586         }
 587 done:
 588         return (NULL);
 589 }
 590
 591 static void
 592 udl_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
 593 {
 594         struct udl_softc *sc = usbd_xfer_softc(xfer);
 595         struct udl_cmd_head *phead = usbd_xfer_get_priv(xfer);
 596         struct udl_cmd_buf *cb;
 597         unsigned i;
 598
 599         switch (USB_GET_STATE(xfer)) {
 600         case USB_ST_TRANSFERRED:
 601                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 602         case USB_ST_SETUP:
 603 tr_setup:
 604                 for (i = 0; i != UDL_CMD_MAX_FRAMES; i++) {
 605                         cb = TAILQ_FIRST(&sc->sc_cmd_buf_pending);
 606                         if (cb == NULL) {
 607                                 cb = udl_fb_synchronize_locked(sc);
 608                                 if (cb == NULL)
 609                                         break;
 610                         } else {
 611                                 TAILQ_REMOVE(&sc->sc_cmd_buf_pending, cb, entry);
 612                         }
 613                         TAILQ_INSERT_TAIL(phead, cb, entry);
 614                         usbd_xfer_set_frame_data(xfer, i, cb->buf, cb->off);
 615                 }
 616                 if (i != 0) {
 617                         usbd_xfer_set_frames(xfer, i);
 618                         usbd_transfer_submit(xfer);
 619                 }
 620                 break;
 621         default:
 622                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 623                 if (error != USB_ERR_CANCELLED) {
 624                         /* try clear stall first */
 625                         usbd_xfer_set_stall(xfer);
 626                         goto tr_setup;
 627                 }
 628                 break;
 629         }
 630         /* wakeup any waiters */
 631         cv_signal(&sc->sc_cv);
 632 }
 633
 634 static int
 635 udl_power_save(struct udl_softc *sc, int on, int flags)
 636 {
 637         struct udl_cmd_buf *cb;
 638
 639         /* get new buffer */
 640         cb = udl_cmd_buf_alloc(sc, flags);
 641         if (cb == NULL)
 642                 return (EAGAIN);
 643
 644         DPRINTF("screen %s\n", on ? "ON" : "OFF");
 645
 646         sc->sc_power_save = on ? 0 : 1;
 647
 648         if (on)
 649                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
 650         else
 651                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_OFF);
 652
 653         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
 654         udl_cmd_buf_send(sc, cb);
 655         return (0);
 656 }
 657
 658 static int
 659 udl_ctrl_msg(struct udl_softc *sc, uint8_t rt, uint8_t r,
 660     uint16_t index, uint16_t value, uint8_t *buf, size_t len)
 661 {
 662         usb_device_request_t req;
 663         int error;
 664
 665         req.bmRequestType = rt;
 666         req.bRequest = r;
 667         USETW(req.wIndex, index);
 668         USETW(req.wValue, value);
 669         USETW(req.wLength, len);
 670
 671         error = usbd_do_request_flags(sc->sc_udev, NULL,
 672             &req, buf, 0, NULL, USB_DEFAULT_TIMEOUT);
 673
 674         DPRINTF("%s\n", usbd_errstr(error));
 675
 676         return (error);
 677 }
 678
 679 static int
 680 udl_poll(struct udl_softc *sc, uint32_t *buf)
 681 {
 682         uint32_t lbuf;
 683         int error;
 684
 685         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 686             UDL_CTRL_CMD_POLL, 0x0000, 0x0000, (uint8_t *)&lbuf, sizeof(lbuf));
 687         if (error == USB_ERR_NORMAL_COMPLETION)
 688                 *buf = le32toh(lbuf);
 689         return (error);
 690 }
 691
 692 static int
 693 udl_read_1(struct udl_softc *sc, uint16_t addr, uint8_t *buf)
 694 {
 695         uint8_t lbuf[1];
 696         int error;
 697
 698         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 699             UDL_CTRL_CMD_READ_1, addr, 0x0000, lbuf, 1);
 700         if (error == USB_ERR_NORMAL_COMPLETION)
 701                 *buf = *(uint8_t *)lbuf;
 702         return (error);
 703 }
 704
 705 static int
 706 udl_write_1(struct udl_softc *sc, uint16_t addr, uint8_t buf)
 707 {
 708         int error;
 709
 710         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 711             UDL_CTRL_CMD_WRITE_1, addr, 0x0000, &buf, 1);
 712         return (error);
 713 }
 714
 715 static int
 716 udl_read_edid(struct udl_softc *sc, uint8_t *buf)
 717 {
 718         uint8_t lbuf[64];
 719         uint16_t offset;
 720         int error;
 721
 722         offset = 0;
 723
 724         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 725             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 726         if (error != USB_ERR_NORMAL_COMPLETION)
 727                 goto fail;
 728         bcopy(lbuf + 1, buf + offset, 63);
 729         offset += 63;
 730
 731         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 732             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 733         if (error != USB_ERR_NORMAL_COMPLETION)
 734                 goto fail;
 735         bcopy(lbuf + 1, buf + offset, 63);
 736         offset += 63;
 737
 738         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 739             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 3);
 740         if (error != USB_ERR_NORMAL_COMPLETION)
 741                 goto fail;
 742         bcopy(lbuf + 1, buf + offset, 2);
 743 fail:
 744         return (error);
 745 }
 746
 747 static uint8_t
 748 udl_lookup_mode(uint16_t hdisplay, uint16_t vdisplay, uint8_t hz,
 749     uint16_t chip, uint32_t clock)
 750 {
 751         uint8_t idx;
 752
 753         /*
 754          * Check first if we have a matching mode with pixelclock
 755          */
 756         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 757                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 758                     (udl_modes[idx].vdisplay == vdisplay) &&
 759                     (udl_modes[idx].clock == clock) &&
 760                     (udl_modes[idx].chip <= chip)) {
 761                         return (idx);
 762                 }
 763         }
 764
 765         /*
 766          * If not, check for matching mode with update frequency
 767          */
 768         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 769                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 770                     (udl_modes[idx].vdisplay == vdisplay) &&
 771                     (udl_modes[idx].hz == hz) &&
 772                     (udl_modes[idx].chip <= chip)) {
 773                         return (idx);
 774                 }
 775         }
 776         return (idx);
 777 }
 778
 779 static void
 780 udl_select_chip(struct udl_softc *sc, struct usb_attach_arg *uaa)
 781 {
 782         const char *pserial;
 783
 784         pserial = usb_get_serial(uaa->device);
 785
 786         sc->sc_chip = DL120;
 787
 788         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 789             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_WSDVI)) {
 790
 791                 /*
 792                  * WS Tech DVI is DL120 or DL160. All deviced uses the
 793                  * same revision (0.04) so iSerialNumber must be used
 794                  * to determin which chip it is.
 795                  */
 796
 797                 if (strlen(pserial) > 7) {
 798                         if (strncmp(pserial, "0198-13", 7) == 0)
 799                                 sc->sc_chip = DL160;
 800                 }
 801                 DPRINTF("iSerialNumber (%s) used to select chip (%d)\n",
 802                     pserial, sc->sc_chip);
 803         }
 804         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 805             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_SWDVI)) {
 806
 807                 /*
 808                  * SUNWEIT DVI is DL160, DL125, DL165 or DL195. Major revision
 809                  * can be used to differ between DL1x0 and DL1x5. Minor to
 810                  * differ between DL1x5. iSerialNumber seems not to be uniqe.
 811                  */
 812
 813                 sc->sc_chip = DL160;
 814
 815                 if (uaa->info.bcdDevice >= 0x100) {
 816                         sc->sc_chip = DL165;
 817                         if (uaa->info.bcdDevice == 0x104)
 818                                 sc->sc_chip = DL195;
 819                         if (uaa->info.bcdDevice == 0x108)
 820                                 sc->sc_chip = DL125;
 821                 }
 822                 DPRINTF("bcdDevice (%02x) used to select chip (%d)\n",
 823                     uaa->info.bcdDevice, sc->sc_chip);
 824         }
 825 }
 826
 827 static int
 828 udl_set_enc_key(struct udl_softc *sc, uint8_t *buf, uint8_t len)
 829 {
 830         int error;
 831
 832         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 833             UDL_CTRL_CMD_SET_KEY, 0x0000, 0x0000, buf, len);
 834         return (error);
 835 }
 836
 837 static void
 838 udl_fbmem_alloc(struct udl_softc *sc)
 839 {
 840         uint32_t size;
 841
 842         size = udl_get_fb_size(sc);
 843         size = round_page(size);
 844         /* check for zero size */
 845         if (size == 0)
 846                 size = PAGE_SIZE;
 847         /*
 848          * It is assumed that allocations above PAGE_SIZE bytes will
 849          * be PAGE_SIZE aligned for use with mmap()
 850          */
 851         sc->sc_fb_addr = udl_buffer_alloc(size);
 852         sc->sc_fb_copy = malloc(size, M_USB_DL, M_WAITOK | M_ZERO);
 853         sc->sc_fb_size = size;
 854 }
 855
 856 static void
 857 udl_cmd_insert_int_1(struct udl_cmd_buf *cb, uint8_t value)
 858 {
 859
 860         cb->buf[cb->off] = value;
 861         cb->off += 1;
 862 }
 863
 864 #if 0
 865 static void
 866 udl_cmd_insert_int_2(struct udl_cmd_buf *cb, uint16_t value)
 867 {
 868         uint16_t lvalue;
 869
 870         lvalue = htobe16(value);
 871         bcopy(&lvalue, cb->buf + cb->off, 2);
 872
 873         cb->off += 2;
 874 }
 875
 876 #endif
 877
 878 static void
 879 udl_cmd_insert_int_3(struct udl_cmd_buf *cb, uint32_t value)
 880 {
 881         uint32_t lvalue;
 882
 883 #if BYTE_ORDER == BIG_ENDIAN
 884         lvalue = htobe32(value) << 8;
 885 #else
 886         lvalue = htobe32(value) >> 8;
 887 #endif
 888         bcopy(&lvalue, cb->buf + cb->off, 3);
 889
 890         cb->off += 3;
 891 }
 892
 893 #if 0
 894 static void
 895 udl_cmd_insert_int_4(struct udl_cmd_buf *cb, uint32_t value)
 896 {
 897         uint32_t lvalue;
 898
 899         lvalue = htobe32(value);
 900         bcopy(&lvalue, cb->buf + cb->off, 4);
 901
 902         cb->off += 4;
 903 }
 904
 905 #endif
 906
 907 static void
 908 udl_cmd_insert_buf_le16(struct udl_cmd_buf *cb, const uint8_t *buf, uint32_t len)
 909 {
 910         uint32_t x;
 911
 912         for (x = 0; x != len; x += 2) {
 913                 /* byte swap from little endian to big endian */
 914                 cb->buf[cb->off + x + 0] = buf[x + 1];
 915                 cb->buf[cb->off + x + 1] = buf[x + 0];
 916         }
 917         cb->off += len;
 918 }
 919
 920 static void
 921 udl_cmd_write_reg_1(struct udl_cmd_buf *cb, uint8_t reg, uint8_t val)
 922 {
 923
 924         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 925         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_REG_WRITE_1);
 926         udl_cmd_insert_int_1(cb, reg);
 927         udl_cmd_insert_int_1(cb, val);
 928 }
 929
 930 static void
 931 udl_cmd_write_reg_3(struct udl_cmd_buf *cb, uint8_t reg, uint32_t val)
 932 {
 933
 934         udl_cmd_write_reg_1(cb, reg + 0, (val >> 16) & 0xff);
 935         udl_cmd_write_reg_1(cb, reg + 1, (val >> 8) & 0xff);
 936         udl_cmd_write_reg_1(cb, reg + 2, (val >> 0) & 0xff);
 937 }
 938
 939 static int
 940 udl_init_chip(struct udl_softc *sc)
 941 {
 942         uint32_t ui32;
 943         uint8_t ui8;
 944         int error;
 945
 946         error = udl_poll(sc, &ui32);
 947         if (error != USB_ERR_NORMAL_COMPLETION)
 948                 return (error);
 949         DPRINTF("poll=0x%08x\n", ui32);
 950
 951         /* Some products may use later chip too */
 952         switch (ui32 & 0xff) {
 953         case 0xf1:                      /* DL1x5 */
 954                 switch (sc->sc_chip) {
 955                 case DL120:
 956                         sc->sc_chip = DL125;
 957                         break;
 958                 case DL160:
 959                         sc->sc_chip = DL165;
 960                         break;
 961                 }
 962                 break;
 963         }
 964         DPRINTF("chip 0x%04x\n", sc->sc_chip);
 965
 966         error = udl_read_1(sc, 0xc484, &ui8);
 967         if (error != USB_ERR_NORMAL_COMPLETION)
 968                 return (error);
 969         DPRINTF("read 0x%02x from 0xc484\n", ui8);
 970
 971         error = udl_write_1(sc, 0xc41f, 0x01);
 972         if (error != USB_ERR_NORMAL_COMPLETION)
 973                 return (error);
 974         DPRINTF("write 0x01 to 0xc41f\n");
 975
 976         error = udl_read_edid(sc, sc->sc_edid);
 977         if (error != USB_ERR_NORMAL_COMPLETION)
 978                 return (error);
 979         DPRINTF("read EDID\n");
 980
 981         error = udl_set_enc_key(sc, __DECONST(void *, udl_null_key_1),
 982             sizeof(udl_null_key_1));
 983         if (error != USB_ERR_NORMAL_COMPLETION)
 984                 return (error);
 985         DPRINTF("set encryption key\n");
 986
 987         error = udl_write_1(sc, 0xc40b, 0x00);
 988         if (error != USB_ERR_NORMAL_COMPLETION)
 989                 return (error);
 990         DPRINTF("write 0x00 to 0xc40b\n");
 991
 992         return (USB_ERR_NORMAL_COMPLETION);
 993 }
 994
 995 static void
 996 udl_init_fb_offsets(struct udl_cmd_buf *cb, uint32_t start16, uint32_t stride16,
 997     uint32_t start8, uint32_t stride8)
 998 {
 999         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
1000         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START16, start16);
1001         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE16, stride16);
1002         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START8, start8);
1003         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE8, stride8);
1004         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1005 }
1006
1007 static int
1008 udl_init_resolution(struct udl_softc *sc)
1009 {
1010         const uint32_t max = udl_get_fb_size(sc);
1011         const uint8_t *buf = udl_modes[sc->sc_cur_mode].mode;
1012         struct udl_cmd_buf *cb;
1013         uint32_t delta;
1014         uint32_t i;
1015         int error;
1016
1017         /* get new buffer */
1018         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1019         if (cb == NULL)
1020                 return (EAGAIN);
1021
1022         /* write resolution values and set video memory offsets */
1023         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
1024         for (i = 0; i < UDL_MODE_SIZE; i++)
1025                 udl_cmd_write_reg_1(cb, i, buf[i]);
1026         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1027
1028         udl_init_fb_offsets(cb, 0x000000, 0x000a00, 0x555555, 0x000500);
1029         udl_cmd_buf_send(sc, cb);
1030
1031         /* fill screen with black color */
1032         for (i = 0; i < max; i += delta) {
1033                 static const uint8_t udl_black[UDL_CMD_MAX_PIXEL_COUNT * 2] __aligned(4);
1034
1035                 delta = max - i;
1036                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
1037                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
1038                 if (i == 0)
1039                         error = udl_cmd_write_buf_le16(sc, udl_black, i, delta / 2, M_WAITOK);
1040                 else
1041                         error = udl_cmd_buf_copy_le16(sc, 0, i, delta / 2, M_WAITOK);
1042                 if (error)
1043                         return (error);
1044         }
1045
1046         /* get new buffer */
1047         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1048         if (cb == NULL)
1049                 return (EAGAIN);
1050
1051         /* show framebuffer content */
1052         udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
1053         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1054         udl_cmd_buf_send(sc, cb);
1055         return (0);
1056 }
1057
1058 static void
1059 udl_select_mode(struct udl_softc *sc)
1060 {
1061         struct udl_mode mode;
1062         int index = UDL_MAX_MODES;
1063         int i;
1064
1065         /* try to get the preferred mode from EDID */
1066         edid_parse(sc->sc_edid, &sc->sc_edid_info);
1067 #ifdef USB_DEBUG
1068         edid_print(&sc->sc_edid_info);
1069 #endif
1070         if (sc->sc_edid_info.edid_preferred_mode != NULL) {
1071                 mode.hz =
1072                     (sc->sc_edid_info.edid_preferred_mode->dot_clock * 1000) /
1073                     (sc->sc_edid_info.edid_preferred_mode->htotal *
1074                     sc->sc_edid_info.edid_preferred_mode->vtotal);
1075                 mode.clock =
1076                     sc->sc_edid_info.edid_preferred_mode->dot_clock / 10;
1077                 mode.hdisplay =
1078                     sc->sc_edid_info.edid_preferred_mode->hdisplay;
1079                 mode.vdisplay =
1080                     sc->sc_edid_info.edid_preferred_mode->vdisplay;
1081                 index = udl_lookup_mode(mode.hdisplay, mode.vdisplay, mode.hz,
1082                     sc->sc_chip, mode.clock);
1083                 sc->sc_cur_mode = index;
1084         } else {
1085                 DPRINTF("no preferred mode found!\n");
1086         }
1087
1088         if (index == UDL_MAX_MODES) {
1089                 DPRINTF("no mode line found\n");
1090
1091                 i = 0;
1092                 while (i < sc->sc_edid_info.edid_nmodes) {
1093                         mode.hz =
1094                             (sc->sc_edid_info.edid_modes[i].dot_clock * 1000) /
1095                             (sc->sc_edid_info.edid_modes[i].htotal *
1096                             sc->sc_edid_info.edid_modes[i].vtotal);
1097                         mode.clock =
1098                             sc->sc_edid_info.edid_modes[i].dot_clock / 10;
1099                         mode.hdisplay =
1100                             sc->sc_edid_info.edid_modes[i].hdisplay;
1101                         mode.vdisplay =
1102                             sc->sc_edid_info.edid_modes[i].vdisplay;
1103                         index = udl_lookup_mode(mode.hdisplay, mode.vdisplay,
1104                             mode.hz, sc->sc_chip, mode.clock);
1105                         if (index < UDL_MAX_MODES)
1106                                 if ((sc->sc_cur_mode == UDL_MAX_MODES) ||
1107                                     (index > sc->sc_cur_mode))
1108                                         sc->sc_cur_mode = index;
1109                         i++;
1110                 }
1111         }
1112         /*
1113          * If no mode found use default.
1114          */
1115         if (sc->sc_cur_mode == UDL_MAX_MODES)
1116                 sc->sc_cur_mode = udl_lookup_mode(800, 600, 60, sc->sc_chip, 0);
1117 }
1118
1119 static int
1120 udl_cmd_write_buf_le16(struct udl_softc *sc, const uint8_t *buf, uint32_t off,
1121     uint8_t pixels, int flags)
1122 {
1123         struct udl_cmd_buf *cb;
1124
1125         cb = udl_cmd_buf_alloc(sc, flags);
1126         if (cb == NULL)
1127                 return (EAGAIN);
1128
1129         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1130         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
1131         udl_cmd_insert_int_3(cb, off);
1132         udl_cmd_insert_int_1(cb, pixels);
1133         udl_cmd_insert_buf_le16(cb, buf, 2 * pixels);
1134         udl_cmd_buf_send(sc, cb);
1135
1136         return (0);
1137 }
1138
1139 static int
1140 udl_cmd_buf_copy_le16(struct udl_softc *sc, uint32_t src, uint32_t dst,
1141     uint8_t pixels, int flags)
1142 {
1143         struct udl_cmd_buf *cb;
1144
1145         cb = udl_cmd_buf_alloc(sc, flags);
1146         if (cb == NULL)
1147                 return (EAGAIN);
1148
1149         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1150         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_COPY | UDL_BULK_CMD_FB_WORD);
1151         udl_cmd_insert_int_3(cb, dst);
1152         udl_cmd_insert_int_1(cb, pixels);
1153         udl_cmd_insert_int_3(cb, src);
1154         udl_cmd_buf_send(sc, cb);
1155
1156         return (0);
1157 }