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         {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DVI_19, DL165)},
 183 };
 184
 185 static void
 186 udl_buffer_init(void *arg)
 187 {
 188         mtx_init(&udl_buffer_mtx, "USB", "UDL", MTX_DEF);
 189         TAILQ_INIT(&udl_buffer_head);
 190 }
 191 SYSINIT(udl_buffer_init, SI_SUB_LOCK, SI_ORDER_FIRST, udl_buffer_init, NULL);
 192
 193 CTASSERT(sizeof(struct udl_buffer) < PAGE_SIZE);
 194
 195 static void *
 196 udl_buffer_alloc(uint32_t size)
 197 {
 198         struct udl_buffer *buf;
 199         mtx_lock(&udl_buffer_mtx);
 200         TAILQ_FOREACH(buf, &udl_buffer_head, entry) {
 201                 if (buf->size == size) {
 202                         TAILQ_REMOVE(&udl_buffer_head, buf, entry);
 203                         break;
 204                 }
 205         }
 206         mtx_unlock(&udl_buffer_mtx);
 207         if (buf != NULL) {
 208                 uint8_t *ptr = ((uint8_t *)buf) - size;
 209                 /* wipe and recycle buffer */
 210                 memset(ptr, 0, size);
 211                 /* return buffer pointer */
 212                 return (ptr);
 213         }
 214         /* allocate new buffer */
 215         return (malloc(size + sizeof(*buf), M_USB_DL, M_WAITOK | M_ZERO));
 216 }
 217
 218 static void
 219 udl_buffer_free(void *_buf, uint32_t size)
 220 {
 221         struct udl_buffer *buf;
 222
 223         /* check for NULL pointer */
 224         if (_buf == NULL)
 225                 return;
 226         /* compute pointer to recycle list */
 227         buf = (struct udl_buffer *)(((uint8_t *)_buf) + size);
 228
 229         /*
 230          * Memory mapped buffers should never be freed.
 231          * Put display buffer into a recycle list.
 232          */
 233         mtx_lock(&udl_buffer_mtx);
 234         buf->size = size;
 235         TAILQ_INSERT_TAIL(&udl_buffer_head, buf, entry);
 236         mtx_unlock(&udl_buffer_mtx);
 237 }
 238
 239 static uint32_t
 240 udl_get_fb_size(struct udl_softc *sc)
 241 {
 242         unsigned i = sc->sc_cur_mode;
 243
 244         return ((uint32_t)udl_modes[i].hdisplay *
 245             (uint32_t)udl_modes[i].vdisplay * 2);
 246 }
 247
 248 static uint32_t
 249 udl_get_fb_width(struct udl_softc *sc)
 250 {
 251         unsigned i = sc->sc_cur_mode;
 252
 253         return (udl_modes[i].hdisplay);
 254 }
 255
 256 static uint32_t
 257 udl_get_fb_height(struct udl_softc *sc)
 258 {
 259         unsigned i = sc->sc_cur_mode;
 260
 261         return (udl_modes[i].vdisplay);
 262 }
 263
 264 static uint32_t
 265 udl_get_fb_hz(struct udl_softc *sc)
 266 {
 267         unsigned i = sc->sc_cur_mode;
 268
 269         return (udl_modes[i].hz);
 270 }
 271
 272 static void
 273 udl_callout(void *arg)
 274 {
 275         struct udl_softc *sc = arg;
 276         const uint32_t max = udl_get_fb_size(sc);
 277         int fps;
 278
 279         if (sc->sc_power_save == 0) {
 280                 fps = udl_fps;
 281
 282                 /* figure out number of frames per second */
 283                 if (fps < UDL_FPS_MIN)
 284                         fps = UDL_FPS_MIN;
 285                 else if (fps > UDL_FPS_MAX)
 286                         fps = UDL_FPS_MAX;
 287
 288                 if (sc->sc_sync_off >= max)
 289                         sc->sc_sync_off = 0;
 290                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 291                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 292         } else {
 293                 fps = 1;
 294         }
 295         callout_reset(&sc->sc_callout, hz / fps, &udl_callout, sc);
 296 }
 297
 298 static int
 299 udl_probe(device_t dev)
 300 {
 301         struct usb_attach_arg *uaa = device_get_ivars(dev);
 302
 303         if (uaa->usb_mode != USB_MODE_HOST)
 304                 return (ENXIO);
 305         if (uaa->info.bConfigIndex != 0)
 306                 return (ENXIO);
 307         if (uaa->info.bIfaceIndex != 0)
 308                 return (ENXIO);
 309
 310         return (usbd_lookup_id_by_uaa(udl_devs, sizeof(udl_devs), uaa));
 311 }
 312
 313 static int
 314 udl_attach(device_t dev)
 315 {
 316         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
 317         struct sysctl_oid *tree = device_get_sysctl_tree(dev);
 318         struct udl_softc *sc = device_get_softc(dev);
 319         struct usb_attach_arg *uaa = device_get_ivars(dev);
 320         int error;
 321         int i;
 322
 323         device_set_usb_desc(dev);
 324
 325         mtx_init(&sc->sc_mtx, "UDL lock", NULL, MTX_DEF);
 326         cv_init(&sc->sc_cv, "UDLCV");
 327         callout_init_mtx(&sc->sc_callout, &sc->sc_mtx, 0);
 328         sc->sc_udev = uaa->device;
 329
 330         error = usbd_transfer_setup(uaa->device, &uaa->info.bIfaceIndex,
 331             sc->sc_xfer, udl_config, UDL_N_TRANSFER, sc, &sc->sc_mtx);
 332
 333         if (error) {
 334                 DPRINTF("usbd_transfer_setup error=%s\n", usbd_errstr(error));
 335                 goto detach;
 336         }
 337         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_0], &sc->sc_xfer_head[0]);
 338         usbd_xfer_set_priv(sc->sc_xfer[UDL_BULK_WRITE_1], &sc->sc_xfer_head[1]);
 339
 340         TAILQ_INIT(&sc->sc_xfer_head[0]);
 341         TAILQ_INIT(&sc->sc_xfer_head[1]);
 342         TAILQ_INIT(&sc->sc_cmd_buf_free);
 343         TAILQ_INIT(&sc->sc_cmd_buf_pending);
 344
 345         sc->sc_def_chip = -1;
 346         sc->sc_chip = USB_GET_DRIVER_INFO(uaa);
 347         sc->sc_def_mode = -1;
 348         sc->sc_cur_mode = UDL_MAX_MODES;
 349
 350         /* Allow chip ID to be overwritten */
 351         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid_force",
 352             CTLFLAG_RWTUN, &sc->sc_def_chip, 0, "chip ID");
 353
 354         /* Export current chip ID */
 355         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "chipid",
 356             CTLFLAG_RD, &sc->sc_chip, 0, "chip ID");
 357
 358         if (sc->sc_def_chip > -1 && sc->sc_def_chip <= DLMAX) {
 359                 device_printf(dev, "Forcing chip ID to 0x%04x\n", sc->sc_def_chip);
 360                 sc->sc_chip = sc->sc_def_chip;
 361         }
 362         /*
 363          * The product might have more than one chip
 364          */
 365         if (sc->sc_chip == DLUNK)
 366                 udl_select_chip(sc, uaa);
 367
 368         for (i = 0; i != UDL_CMD_MAX_BUFFERS; i++) {
 369                 struct udl_cmd_buf *cb = &sc->sc_cmd_buf_temp[i];
 370
 371                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 372         }
 373
 374         /*
 375          * Initialize chip.
 376          */
 377         error = udl_init_chip(sc);
 378         if (error != USB_ERR_NORMAL_COMPLETION)
 379                 goto detach;
 380
 381         /*
 382          * Select edid mode.
 383          */
 384         udl_select_mode(sc);
 385
 386         /* Allow default mode to be overwritten */
 387         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode_force",
 388             CTLFLAG_RWTUN, &sc->sc_def_mode, 0, "mode");
 389
 390         /* Export current mode */
 391         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, "mode",
 392             CTLFLAG_RD, &sc->sc_cur_mode, 0, "mode");
 393
 394         i = sc->sc_def_mode;
 395         if (i > -1 && i < UDL_MAX_MODES) {
 396                 if (udl_modes[i].chip <= sc->sc_chip) {
 397                         device_printf(dev, "Forcing mode to %d\n", i);
 398                         sc->sc_cur_mode = i;
 399                 }
 400         }
 401         /* Printout current mode */
 402         device_printf(dev, "Mode selected %dx%d @ %dHz\n",
 403             (int)udl_get_fb_width(sc),
 404             (int)udl_get_fb_height(sc),
 405             (int)udl_get_fb_hz(sc));
 406
 407         udl_init_resolution(sc);
 408
 409         /* Allocate frame buffer */
 410         udl_fbmem_alloc(sc);
 411
 412         UDL_LOCK(sc);
 413         udl_callout(sc);
 414         UDL_UNLOCK(sc);
 415
 416         sc->sc_fb_info.fb_name = device_get_nameunit(dev);
 417         sc->sc_fb_info.fb_size = sc->sc_fb_size;
 418         sc->sc_fb_info.fb_bpp = 16;
 419         sc->sc_fb_info.fb_depth = 16;
 420         sc->sc_fb_info.fb_width = udl_get_fb_width(sc);
 421         sc->sc_fb_info.fb_height = udl_get_fb_height(sc);
 422         sc->sc_fb_info.fb_stride = sc->sc_fb_info.fb_width * 2;
 423         sc->sc_fb_info.fb_pbase = 0;
 424         sc->sc_fb_info.fb_vbase = (uintptr_t)sc->sc_fb_addr;
 425         sc->sc_fb_info.fb_priv = sc;
 426         sc->sc_fb_info.setblankmode = &udl_fb_setblankmode;
 427
 428         sc->sc_fbdev = device_add_child(dev, "fbd", -1);
 429         if (sc->sc_fbdev == NULL)
 430                 goto detach;
 431         if (device_probe_and_attach(sc->sc_fbdev) != 0)
 432                 goto detach;
 433
 434         return (0);
 435
 436 detach:
 437         udl_detach(dev);
 438
 439         return (ENXIO);
 440 }
 441
 442 static int
 443 udl_detach(device_t dev)
 444 {
 445         struct udl_softc *sc = device_get_softc(dev);
 446
 447         /* delete all child devices */
 448         device_delete_children(dev);
 449
 450         UDL_LOCK(sc);
 451         sc->sc_gone = 1;
 452         callout_stop(&sc->sc_callout);
 453         UDL_UNLOCK(sc);
 454
 455         usbd_transfer_unsetup(sc->sc_xfer, UDL_N_TRANSFER);
 456
 457         callout_drain(&sc->sc_callout);
 458
 459         mtx_destroy(&sc->sc_mtx);
 460         cv_destroy(&sc->sc_cv);
 461
 462         /* put main framebuffer into a recycle list, if any */
 463         udl_buffer_free(sc->sc_fb_addr, sc->sc_fb_size);
 464
 465         /* free shadow framebuffer memory, if any */
 466         free(sc->sc_fb_copy, M_USB_DL);
 467
 468         return (0);
 469 }
 470
 471 static struct fb_info *
 472 udl_fb_getinfo(device_t dev)
 473 {
 474         struct udl_softc *sc = device_get_softc(dev);
 475
 476         return (&sc->sc_fb_info);
 477 }
 478
 479 static int
 480 udl_fb_setblankmode(void *arg, int mode)
 481 {
 482         struct udl_softc *sc = arg;
 483
 484         switch (mode) {
 485         case V_DISPLAY_ON:
 486                 udl_power_save(sc, 1, M_WAITOK);
 487                 break;
 488         case V_DISPLAY_BLANK:
 489                 udl_power_save(sc, 1, M_WAITOK);
 490                 if (sc->sc_fb_addr != 0) {
 491                         const uint32_t max = udl_get_fb_size(sc);
 492
 493                         memset((void *)sc->sc_fb_addr, 0, max);
 494                 }
 495                 break;
 496         case V_DISPLAY_STAND_BY:
 497         case V_DISPLAY_SUSPEND:
 498                 udl_power_save(sc, 0, M_WAITOK);
 499                 break;
 500         }
 501         return (0);
 502 }
 503
 504 static struct udl_cmd_buf *
 505 udl_cmd_buf_alloc_locked(struct udl_softc *sc, int flags)
 506 {
 507         struct udl_cmd_buf *cb;
 508
 509         while ((cb = TAILQ_FIRST(&sc->sc_cmd_buf_free)) == NULL) {
 510                 if (flags != M_WAITOK)
 511                         break;
 512                 cv_wait(&sc->sc_cv, &sc->sc_mtx);
 513         }
 514         if (cb != NULL) {
 515                 TAILQ_REMOVE(&sc->sc_cmd_buf_free, cb, entry);
 516                 cb->off = 0;
 517         }
 518         return (cb);
 519 }
 520
 521 static struct udl_cmd_buf *
 522 udl_cmd_buf_alloc(struct udl_softc *sc, int flags)
 523 {
 524         struct udl_cmd_buf *cb;
 525
 526         UDL_LOCK(sc);
 527         cb = udl_cmd_buf_alloc_locked(sc, flags);
 528         UDL_UNLOCK(sc);
 529         return (cb);
 530 }
 531
 532 static void
 533 udl_cmd_buf_send(struct udl_softc *sc, struct udl_cmd_buf *cb)
 534 {
 535         UDL_LOCK(sc);
 536         if (sc->sc_gone) {
 537                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
 538         } else {
 539                 /* mark end of command stack */
 540                 udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 541                 udl_cmd_insert_int_1(cb, UDL_BULK_CMD_EOC);
 542
 543                 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_pending, cb, entry);
 544                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
 545                 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
 546         }
 547         UDL_UNLOCK(sc);
 548 }
 549
 550 static struct udl_cmd_buf *
 551 udl_fb_synchronize_locked(struct udl_softc *sc)
 552 {
 553         const uint32_t max = udl_get_fb_size(sc);
 554
 555         /* check if framebuffer is not ready */
 556         if (sc->sc_fb_addr == NULL ||
 557             sc->sc_fb_copy == NULL)
 558                 return (NULL);
 559
 560         while (sc->sc_sync_off < max) {
 561                 uint32_t delta = max - sc->sc_sync_off;
 562
 563                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
 564                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
 565                 if (bcmp(sc->sc_fb_addr + sc->sc_sync_off, sc->sc_fb_copy + sc->sc_sync_off, delta) != 0) {
 566                         struct udl_cmd_buf *cb;
 567
 568                         cb = udl_cmd_buf_alloc_locked(sc, M_NOWAIT);
 569                         if (cb == NULL)
 570                                 goto done;
 571                         memcpy(sc->sc_fb_copy + sc->sc_sync_off,
 572                             sc->sc_fb_addr + sc->sc_sync_off, delta);
 573                         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 574                         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
 575                         udl_cmd_insert_int_3(cb, sc->sc_sync_off);
 576                         udl_cmd_insert_int_1(cb, delta / 2);
 577                         udl_cmd_insert_buf_le16(cb, sc->sc_fb_copy + sc->sc_sync_off, delta);
 578                         sc->sc_sync_off += delta;
 579                         return (cb);
 580                 } else {
 581                         sc->sc_sync_off += delta;
 582                 }
 583         }
 584 done:
 585         return (NULL);
 586 }
 587
 588 static void
 589 udl_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
 590 {
 591         struct udl_softc *sc = usbd_xfer_softc(xfer);
 592         struct udl_cmd_head *phead = usbd_xfer_get_priv(xfer);
 593         struct udl_cmd_buf *cb;
 594         unsigned i;
 595
 596         switch (USB_GET_STATE(xfer)) {
 597         case USB_ST_TRANSFERRED:
 598                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 599         case USB_ST_SETUP:
 600 tr_setup:
 601                 for (i = 0; i != UDL_CMD_MAX_FRAMES; i++) {
 602                         cb = TAILQ_FIRST(&sc->sc_cmd_buf_pending);
 603                         if (cb == NULL) {
 604                                 cb = udl_fb_synchronize_locked(sc);
 605                                 if (cb == NULL)
 606                                         break;
 607                         } else {
 608                                 TAILQ_REMOVE(&sc->sc_cmd_buf_pending, cb, entry);
 609                         }
 610                         TAILQ_INSERT_TAIL(phead, cb, entry);
 611                         usbd_xfer_set_frame_data(xfer, i, cb->buf, cb->off);
 612                 }
 613                 if (i != 0) {
 614                         usbd_xfer_set_frames(xfer, i);
 615                         usbd_transfer_submit(xfer);
 616                 }
 617                 break;
 618         default:
 619                 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
 620                 if (error != USB_ERR_CANCELLED) {
 621                         /* try clear stall first */
 622                         usbd_xfer_set_stall(xfer);
 623                         goto tr_setup;
 624                 }
 625                 break;
 626         }
 627         /* wakeup any waiters */
 628         cv_signal(&sc->sc_cv);
 629 }
 630
 631 static int
 632 udl_power_save(struct udl_softc *sc, int on, int flags)
 633 {
 634         struct udl_cmd_buf *cb;
 635
 636         /* get new buffer */
 637         cb = udl_cmd_buf_alloc(sc, flags);
 638         if (cb == NULL)
 639                 return (EAGAIN);
 640
 641         DPRINTF("screen %s\n", on ? "ON" : "OFF");
 642
 643         sc->sc_power_save = on ? 0 : 1;
 644
 645         if (on)
 646                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
 647         else
 648                 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_OFF);
 649
 650         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
 651         udl_cmd_buf_send(sc, cb);
 652         return (0);
 653 }
 654
 655 static int
 656 udl_ctrl_msg(struct udl_softc *sc, uint8_t rt, uint8_t r,
 657     uint16_t index, uint16_t value, uint8_t *buf, size_t len)
 658 {
 659         usb_device_request_t req;
 660         int error;
 661
 662         req.bmRequestType = rt;
 663         req.bRequest = r;
 664         USETW(req.wIndex, index);
 665         USETW(req.wValue, value);
 666         USETW(req.wLength, len);
 667
 668         error = usbd_do_request_flags(sc->sc_udev, NULL,
 669             &req, buf, 0, NULL, USB_DEFAULT_TIMEOUT);
 670
 671         DPRINTF("%s\n", usbd_errstr(error));
 672
 673         return (error);
 674 }
 675
 676 static int
 677 udl_poll(struct udl_softc *sc, uint32_t *buf)
 678 {
 679         uint32_t lbuf;
 680         int error;
 681
 682         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 683             UDL_CTRL_CMD_POLL, 0x0000, 0x0000, (uint8_t *)&lbuf, sizeof(lbuf));
 684         if (error == USB_ERR_NORMAL_COMPLETION)
 685                 *buf = le32toh(lbuf);
 686         return (error);
 687 }
 688
 689 static int
 690 udl_read_1(struct udl_softc *sc, uint16_t addr, uint8_t *buf)
 691 {
 692         uint8_t lbuf[1];
 693         int error;
 694
 695         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 696             UDL_CTRL_CMD_READ_1, addr, 0x0000, lbuf, 1);
 697         if (error == USB_ERR_NORMAL_COMPLETION)
 698                 *buf = *(uint8_t *)lbuf;
 699         return (error);
 700 }
 701
 702 static int
 703 udl_write_1(struct udl_softc *sc, uint16_t addr, uint8_t buf)
 704 {
 705         int error;
 706
 707         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 708             UDL_CTRL_CMD_WRITE_1, addr, 0x0000, &buf, 1);
 709         return (error);
 710 }
 711
 712 static int
 713 udl_read_edid(struct udl_softc *sc, uint8_t *buf)
 714 {
 715         uint8_t lbuf[64];
 716         uint16_t offset;
 717         int error;
 718
 719         offset = 0;
 720
 721         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 722             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 723         if (error != USB_ERR_NORMAL_COMPLETION)
 724                 goto fail;
 725         bcopy(lbuf + 1, buf + offset, 63);
 726         offset += 63;
 727
 728         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 729             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
 730         if (error != USB_ERR_NORMAL_COMPLETION)
 731                 goto fail;
 732         bcopy(lbuf + 1, buf + offset, 63);
 733         offset += 63;
 734
 735         error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
 736             UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 3);
 737         if (error != USB_ERR_NORMAL_COMPLETION)
 738                 goto fail;
 739         bcopy(lbuf + 1, buf + offset, 2);
 740 fail:
 741         return (error);
 742 }
 743
 744 static uint8_t
 745 udl_lookup_mode(uint16_t hdisplay, uint16_t vdisplay, uint8_t hz,
 746     uint16_t chip, uint32_t clock)
 747 {
 748         uint8_t idx;
 749
 750         /*
 751          * Check first if we have a matching mode with pixelclock
 752          */
 753         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 754                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 755                     (udl_modes[idx].vdisplay == vdisplay) &&
 756                     (udl_modes[idx].clock == clock) &&
 757                     (udl_modes[idx].chip <= chip)) {
 758                         return (idx);
 759                 }
 760         }
 761
 762         /*
 763          * If not, check for matching mode with update frequency
 764          */
 765         for (idx = 0; idx != UDL_MAX_MODES; idx++) {
 766                 if ((udl_modes[idx].hdisplay == hdisplay) &&
 767                     (udl_modes[idx].vdisplay == vdisplay) &&
 768                     (udl_modes[idx].hz == hz) &&
 769                     (udl_modes[idx].chip <= chip)) {
 770                         return (idx);
 771                 }
 772         }
 773         return (idx);
 774 }
 775
 776 static void
 777 udl_select_chip(struct udl_softc *sc, struct usb_attach_arg *uaa)
 778 {
 779         const char *pserial;
 780
 781         pserial = usb_get_serial(uaa->device);
 782
 783         sc->sc_chip = DL120;
 784
 785         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 786             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_WSDVI)) {
 787
 788                 /*
 789                  * WS Tech DVI is DL120 or DL160. All deviced uses the
 790                  * same revision (0.04) so iSerialNumber must be used
 791                  * to determin which chip it is.
 792                  */
 793
 794                 if (strlen(pserial) > 7) {
 795                         if (strncmp(pserial, "0198-13", 7) == 0)
 796                                 sc->sc_chip = DL160;
 797                 }
 798                 DPRINTF("iSerialNumber (%s) used to select chip (%d)\n",
 799                     pserial, sc->sc_chip);
 800         }
 801         if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
 802             (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_SWDVI)) {
 803
 804                 /*
 805                  * SUNWEIT DVI is DL160, DL125, DL165 or DL195. Major revision
 806                  * can be used to differ between DL1x0 and DL1x5. Minor to
 807                  * differ between DL1x5. iSerialNumber seems not to be uniqe.
 808                  */
 809
 810                 sc->sc_chip = DL160;
 811
 812                 if (uaa->info.bcdDevice >= 0x100) {
 813                         sc->sc_chip = DL165;
 814                         if (uaa->info.bcdDevice == 0x104)
 815                                 sc->sc_chip = DL195;
 816                         if (uaa->info.bcdDevice == 0x108)
 817                                 sc->sc_chip = DL125;
 818                 }
 819                 DPRINTF("bcdDevice (%02x) used to select chip (%d)\n",
 820                     uaa->info.bcdDevice, sc->sc_chip);
 821         }
 822 }
 823
 824 static int
 825 udl_set_enc_key(struct udl_softc *sc, uint8_t *buf, uint8_t len)
 826 {
 827         int error;
 828
 829         error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
 830             UDL_CTRL_CMD_SET_KEY, 0x0000, 0x0000, buf, len);
 831         return (error);
 832 }
 833
 834 static void
 835 udl_fbmem_alloc(struct udl_softc *sc)
 836 {
 837         uint32_t size;
 838
 839         size = udl_get_fb_size(sc);
 840         size = round_page(size);
 841         /* check for zero size */
 842         if (size == 0)
 843                 size = PAGE_SIZE;
 844         /*
 845          * It is assumed that allocations above PAGE_SIZE bytes will
 846          * be PAGE_SIZE aligned for use with mmap()
 847          */
 848         sc->sc_fb_addr = udl_buffer_alloc(size);
 849         sc->sc_fb_copy = malloc(size, M_USB_DL, M_WAITOK | M_ZERO);
 850         sc->sc_fb_size = size;
 851 }
 852
 853 static void
 854 udl_cmd_insert_int_1(struct udl_cmd_buf *cb, uint8_t value)
 855 {
 856
 857         cb->buf[cb->off] = value;
 858         cb->off += 1;
 859 }
 860
 861 #if 0
 862 static void
 863 udl_cmd_insert_int_2(struct udl_cmd_buf *cb, uint16_t value)
 864 {
 865         uint16_t lvalue;
 866
 867         lvalue = htobe16(value);
 868         bcopy(&lvalue, cb->buf + cb->off, 2);
 869
 870         cb->off += 2;
 871 }
 872
 873 #endif
 874
 875 static void
 876 udl_cmd_insert_int_3(struct udl_cmd_buf *cb, uint32_t value)
 877 {
 878         uint32_t lvalue;
 879
 880 #if BYTE_ORDER == BIG_ENDIAN
 881         lvalue = htobe32(value) << 8;
 882 #else
 883         lvalue = htobe32(value) >> 8;
 884 #endif
 885         bcopy(&lvalue, cb->buf + cb->off, 3);
 886
 887         cb->off += 3;
 888 }
 889
 890 #if 0
 891 static void
 892 udl_cmd_insert_int_4(struct udl_cmd_buf *cb, uint32_t value)
 893 {
 894         uint32_t lvalue;
 895
 896         lvalue = htobe32(value);
 897         bcopy(&lvalue, cb->buf + cb->off, 4);
 898
 899         cb->off += 4;
 900 }
 901
 902 #endif
 903
 904 static void
 905 udl_cmd_insert_buf_le16(struct udl_cmd_buf *cb, const uint8_t *buf, uint32_t len)
 906 {
 907         uint32_t x;
 908
 909         for (x = 0; x != len; x += 2) {
 910                 /* byte swap from little endian to big endian */
 911                 cb->buf[cb->off + x + 0] = buf[x + 1];
 912                 cb->buf[cb->off + x + 1] = buf[x + 0];
 913         }
 914         cb->off += len;
 915 }
 916
 917 static void
 918 udl_cmd_write_reg_1(struct udl_cmd_buf *cb, uint8_t reg, uint8_t val)
 919 {
 920
 921         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
 922         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_REG_WRITE_1);
 923         udl_cmd_insert_int_1(cb, reg);
 924         udl_cmd_insert_int_1(cb, val);
 925 }
 926
 927 static void
 928 udl_cmd_write_reg_3(struct udl_cmd_buf *cb, uint8_t reg, uint32_t val)
 929 {
 930
 931         udl_cmd_write_reg_1(cb, reg + 0, (val >> 16) & 0xff);
 932         udl_cmd_write_reg_1(cb, reg + 1, (val >> 8) & 0xff);
 933         udl_cmd_write_reg_1(cb, reg + 2, (val >> 0) & 0xff);
 934 }
 935
 936 static int
 937 udl_init_chip(struct udl_softc *sc)
 938 {
 939         uint32_t ui32;
 940         uint8_t ui8;
 941         int error;
 942
 943         error = udl_poll(sc, &ui32);
 944         if (error != USB_ERR_NORMAL_COMPLETION)
 945                 return (error);
 946         DPRINTF("poll=0x%08x\n", ui32);
 947
 948         /* Some products may use later chip too */
 949         switch (ui32 & 0xff) {
 950         case 0xf1:                      /* DL1x5 */
 951                 switch (sc->sc_chip) {
 952                 case DL120:
 953                         sc->sc_chip = DL125;
 954                         break;
 955                 case DL160:
 956                         sc->sc_chip = DL165;
 957                         break;
 958                 }
 959                 break;
 960         }
 961         DPRINTF("chip 0x%04x\n", sc->sc_chip);
 962
 963         error = udl_read_1(sc, 0xc484, &ui8);
 964         if (error != USB_ERR_NORMAL_COMPLETION)
 965                 return (error);
 966         DPRINTF("read 0x%02x from 0xc484\n", ui8);
 967
 968         error = udl_write_1(sc, 0xc41f, 0x01);
 969         if (error != USB_ERR_NORMAL_COMPLETION)
 970                 return (error);
 971         DPRINTF("write 0x01 to 0xc41f\n");
 972
 973         error = udl_read_edid(sc, sc->sc_edid);
 974         if (error != USB_ERR_NORMAL_COMPLETION)
 975                 return (error);
 976         DPRINTF("read EDID\n");
 977
 978         error = udl_set_enc_key(sc, __DECONST(void *, udl_null_key_1),
 979             sizeof(udl_null_key_1));
 980         if (error != USB_ERR_NORMAL_COMPLETION)
 981                 return (error);
 982         DPRINTF("set encryption key\n");
 983
 984         error = udl_write_1(sc, 0xc40b, 0x00);
 985         if (error != USB_ERR_NORMAL_COMPLETION)
 986                 return (error);
 987         DPRINTF("write 0x00 to 0xc40b\n");
 988
 989         return (USB_ERR_NORMAL_COMPLETION);
 990 }
 991
 992 static void
 993 udl_init_fb_offsets(struct udl_cmd_buf *cb, uint32_t start16, uint32_t stride16,
 994     uint32_t start8, uint32_t stride8)
 995 {
 996         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
 997         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START16, start16);
 998         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE16, stride16);
 999         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_START8, start8);
1000         udl_cmd_write_reg_3(cb, UDL_REG_ADDR_STRIDE8, stride8);
1001         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1002 }
1003
1004 static int
1005 udl_init_resolution(struct udl_softc *sc)
1006 {
1007         const uint32_t max = udl_get_fb_size(sc);
1008         const uint8_t *buf = udl_modes[sc->sc_cur_mode].mode;
1009         struct udl_cmd_buf *cb;
1010         uint32_t delta;
1011         uint32_t i;
1012         int error;
1013
1014         /* get new buffer */
1015         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1016         if (cb == NULL)
1017                 return (EAGAIN);
1018
1019         /* write resolution values and set video memory offsets */
1020         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0x00);
1021         for (i = 0; i < UDL_MODE_SIZE; i++)
1022                 udl_cmd_write_reg_1(cb, i, buf[i]);
1023         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1024
1025         udl_init_fb_offsets(cb, 0x000000, 0x000a00, 0x555555, 0x000500);
1026         udl_cmd_buf_send(sc, cb);
1027
1028         /* fill screen with black color */
1029         for (i = 0; i < max; i += delta) {
1030                 static const uint8_t udl_black[UDL_CMD_MAX_PIXEL_COUNT * 2] __aligned(4);
1031
1032                 delta = max - i;
1033                 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
1034                         delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
1035                 if (i == 0)
1036                         error = udl_cmd_write_buf_le16(sc, udl_black, i, delta / 2, M_WAITOK);
1037                 else
1038                         error = udl_cmd_buf_copy_le16(sc, 0, i, delta / 2, M_WAITOK);
1039                 if (error)
1040                         return (error);
1041         }
1042
1043         /* get new buffer */
1044         cb = udl_cmd_buf_alloc(sc, M_WAITOK);
1045         if (cb == NULL)
1046                 return (EAGAIN);
1047
1048         /* show framebuffer content */
1049         udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
1050         udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
1051         udl_cmd_buf_send(sc, cb);
1052         return (0);
1053 }
1054
1055 static void
1056 udl_select_mode(struct udl_softc *sc)
1057 {
1058         struct udl_mode mode;
1059         int index = UDL_MAX_MODES;
1060         int i;
1061
1062         /* try to get the preferred mode from EDID */
1063         edid_parse(sc->sc_edid, &sc->sc_edid_info);
1064 #ifdef USB_DEBUG
1065         edid_print(&sc->sc_edid_info);
1066 #endif
1067         if (sc->sc_edid_info.edid_preferred_mode != NULL) {
1068                 mode.hz =
1069                     (sc->sc_edid_info.edid_preferred_mode->dot_clock * 1000) /
1070                     (sc->sc_edid_info.edid_preferred_mode->htotal *
1071                     sc->sc_edid_info.edid_preferred_mode->vtotal);
1072                 mode.clock =
1073                     sc->sc_edid_info.edid_preferred_mode->dot_clock / 10;
1074                 mode.hdisplay =
1075                     sc->sc_edid_info.edid_preferred_mode->hdisplay;
1076                 mode.vdisplay =
1077                     sc->sc_edid_info.edid_preferred_mode->vdisplay;
1078                 index = udl_lookup_mode(mode.hdisplay, mode.vdisplay, mode.hz,
1079                     sc->sc_chip, mode.clock);
1080                 sc->sc_cur_mode = index;
1081         } else {
1082                 DPRINTF("no preferred mode found!\n");
1083         }
1084
1085         if (index == UDL_MAX_MODES) {
1086                 DPRINTF("no mode line found\n");
1087
1088                 i = 0;
1089                 while (i < sc->sc_edid_info.edid_nmodes) {
1090                         mode.hz =
1091                             (sc->sc_edid_info.edid_modes[i].dot_clock * 1000) /
1092                             (sc->sc_edid_info.edid_modes[i].htotal *
1093                             sc->sc_edid_info.edid_modes[i].vtotal);
1094                         mode.clock =
1095                             sc->sc_edid_info.edid_modes[i].dot_clock / 10;
1096                         mode.hdisplay =
1097                             sc->sc_edid_info.edid_modes[i].hdisplay;
1098                         mode.vdisplay =
1099                             sc->sc_edid_info.edid_modes[i].vdisplay;
1100                         index = udl_lookup_mode(mode.hdisplay, mode.vdisplay,
1101                             mode.hz, sc->sc_chip, mode.clock);
1102                         if (index < UDL_MAX_MODES)
1103                                 if ((sc->sc_cur_mode == UDL_MAX_MODES) ||
1104                                     (index > sc->sc_cur_mode))
1105                                         sc->sc_cur_mode = index;
1106                         i++;
1107                 }
1108         }
1109         /*
1110          * If no mode found use default.
1111          */
1112         if (sc->sc_cur_mode == UDL_MAX_MODES)
1113                 sc->sc_cur_mode = udl_lookup_mode(800, 600, 60, sc->sc_chip, 0);
1114 }
1115
1116 static int
1117 udl_cmd_write_buf_le16(struct udl_softc *sc, const uint8_t *buf, uint32_t off,
1118     uint8_t pixels, int flags)
1119 {
1120         struct udl_cmd_buf *cb;
1121
1122         cb = udl_cmd_buf_alloc(sc, flags);
1123         if (cb == NULL)
1124                 return (EAGAIN);
1125
1126         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1127         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
1128         udl_cmd_insert_int_3(cb, off);
1129         udl_cmd_insert_int_1(cb, pixels);
1130         udl_cmd_insert_buf_le16(cb, buf, 2 * pixels);
1131         udl_cmd_buf_send(sc, cb);
1132
1133         return (0);
1134 }
1135
1136 static int
1137 udl_cmd_buf_copy_le16(struct udl_softc *sc, uint32_t src, uint32_t dst,
1138     uint8_t pixels, int flags)
1139 {
1140         struct udl_cmd_buf *cb;
1141
1142         cb = udl_cmd_buf_alloc(sc, flags);
1143         if (cb == NULL)
1144                 return (EAGAIN);
1145
1146         udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
1147         udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_COPY | UDL_BULK_CMD_FB_WORD);
1148         udl_cmd_insert_int_3(cb, dst);
1149         udl_cmd_insert_int_1(cb, pixels);
1150         udl_cmd_insert_int_3(cb, src);
1151         udl_cmd_buf_send(sc, cb);
1152
1153         return (0);
1154 }