1 /* $OpenBSD: udl.c,v 1.81 2014/12/09 07:05:06 doug Exp $ */
2
3 /*-
4 * Copyright (c) 2015 Hans Petter Selasky <hselasky@freebsd.org>
5 * Copyright (c) 2009 Marcus Glocker <mglocker@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 /*
21 * Driver for the "DisplayLink DL-120 / DL-160" graphic chips based on
22 * the reversed engineered specifications of Florian Echtler
23 * <floe@butterbrot.org>:
24 *
25 * http://floe.butterbrot.org/displaylink/doku.php
26 */
27
28 #include <sys/param.h>
29 #include <sys/bus.h>
30 #include <sys/callout.h>
31 #include <sys/conf.h>
32 #include <sys/kernel.h>
33 #include <sys/lock.h>
34 #include <sys/module.h>
35 #include <sys/mutex.h>
36 #include <sys/condvar.h>
37 #include <sys/sysctl.h>
38 #include <sys/systm.h>
39 #include <sys/consio.h>
40 #include <sys/fbio.h>
41
42 #include <dev/fb/fbreg.h>
43 #include <dev/syscons/syscons.h>
44
45 #include <dev/videomode/videomode.h>
46 #include <dev/videomode/edidvar.h>
47
48 #include <dev/usb/usb.h>
49 #include <dev/usb/usbdi.h>
50 #include <dev/usb/usbdi_util.h>
51 #include "usbdevs.h"
52
53 #include <dev/usb/video/udl.h>
54
55 #include "fb_if.h"
56
57 #undef DPRINTF
58 #undef DPRINTFN
59 #define USB_DEBUG_VAR udl_debug
60 #include <dev/usb/usb_debug.h>
61
62 static SYSCTL_NODE(_hw_usb, OID_AUTO, udl, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
63 "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 device_method_t udl_methods[] = {
136 DEVMETHOD(device_probe, udl_probe),
137 DEVMETHOD(device_attach, udl_attach),
138 DEVMETHOD(device_detach, udl_detach),
139 DEVMETHOD(fb_getinfo, udl_fb_getinfo),
140 DEVMETHOD_END
141 };
142
143 static driver_t udl_driver = {
144 .name = "udl",
145 .methods = udl_methods,
146 .size = sizeof(struct udl_softc),
147 };
148
149 DRIVER_MODULE(udl, uhub, udl_driver, NULL, NULL);
150 MODULE_DEPEND(udl, usb, 1, 1, 1);
151 MODULE_DEPEND(udl, fbd, 1, 1, 1);
152 MODULE_DEPEND(udl, videomode, 1, 1, 1);
153 MODULE_VERSION(udl, 1);
154
155 /*
156 * Matching devices.
157 */
158 static const STRUCT_USB_HOST_ID udl_devs[] = {
159 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD4300U, DL120)},
160 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD8000U, DL120)},
161 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_GUC2020, DL160)},
162 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LD220, DL165)},
163 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VCUD60, DL160)},
164 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DLDVI, DL160)},
165 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VGA10, DL120)},
166 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_WSDVI, DLUNK)},
167 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_EC008, DL160)},
168 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_HPDOCK, DL160)},
169 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NL571, DL160)},
170 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_M01061, DL195)},
171 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_NBDOCK, DL165)},
172 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_SWDVI, DLUNK)},
173 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_UM7X0, DL120)},
174 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_CONV, DL160)},
175 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_PLUGABLE, DL160)},
176 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LUM70, DL125)},
177 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_POLARIS2, DLUNK)},
178 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LT1421, DLUNK)},
179 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_ITEC, DL165)},
180 {USB_VPI(USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DVI_19, DL165)},
181 };
182
183 static void
udl_buffer_init(void * arg)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 *
udl_buffer_alloc(uint32_t size)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
udl_buffer_free(void * _buf,uint32_t size)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
udl_get_fb_size(struct udl_softc * sc)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
udl_get_fb_width(struct udl_softc * sc)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
udl_get_fb_height(struct udl_softc * sc)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
udl_get_fb_hz(struct udl_softc * sc)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
udl_callout(void * arg)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
udl_probe(device_t dev)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
udl_attach(device_t dev)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", DEVICE_UNIT_ANY);
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
udl_detach(device_t dev)441 udl_detach(device_t dev)
442 {
443 struct udl_softc *sc = device_get_softc(dev);
444 int error;
445
446 /* delete all child devices */
447 error = bus_generic_detach(dev);
448 if (error != 0)
449 return (error);
450
451 UDL_LOCK(sc);
452 sc->sc_gone = 1;
453 callout_stop(&sc->sc_callout);
454 UDL_UNLOCK(sc);
455
456 usbd_transfer_unsetup(sc->sc_xfer, UDL_N_TRANSFER);
457
458 callout_drain(&sc->sc_callout);
459
460 mtx_destroy(&sc->sc_mtx);
461 cv_destroy(&sc->sc_cv);
462
463 /* put main framebuffer into a recycle list, if any */
464 udl_buffer_free(sc->sc_fb_addr, sc->sc_fb_size);
465
466 /* free shadow framebuffer memory, if any */
467 free(sc->sc_fb_copy, M_USB_DL);
468
469 return (0);
470 }
471
472 static struct fb_info *
udl_fb_getinfo(device_t dev)473 udl_fb_getinfo(device_t dev)
474 {
475 struct udl_softc *sc = device_get_softc(dev);
476
477 return (&sc->sc_fb_info);
478 }
479
480 static int
udl_fb_setblankmode(void * arg,int mode)481 udl_fb_setblankmode(void *arg, int mode)
482 {
483 struct udl_softc *sc = arg;
484
485 switch (mode) {
486 case V_DISPLAY_ON:
487 udl_power_save(sc, 1, M_WAITOK);
488 break;
489 case V_DISPLAY_BLANK:
490 udl_power_save(sc, 1, M_WAITOK);
491 if (sc->sc_fb_addr != 0) {
492 const uint32_t max = udl_get_fb_size(sc);
493
494 memset((void *)sc->sc_fb_addr, 0, max);
495 }
496 break;
497 case V_DISPLAY_STAND_BY:
498 case V_DISPLAY_SUSPEND:
499 udl_power_save(sc, 0, M_WAITOK);
500 break;
501 }
502 return (0);
503 }
504
505 static struct udl_cmd_buf *
udl_cmd_buf_alloc_locked(struct udl_softc * sc,int flags)506 udl_cmd_buf_alloc_locked(struct udl_softc *sc, int flags)
507 {
508 struct udl_cmd_buf *cb;
509
510 while ((cb = TAILQ_FIRST(&sc->sc_cmd_buf_free)) == NULL) {
511 if (flags != M_WAITOK)
512 break;
513 cv_wait(&sc->sc_cv, &sc->sc_mtx);
514 }
515 if (cb != NULL) {
516 TAILQ_REMOVE(&sc->sc_cmd_buf_free, cb, entry);
517 cb->off = 0;
518 }
519 return (cb);
520 }
521
522 static struct udl_cmd_buf *
udl_cmd_buf_alloc(struct udl_softc * sc,int flags)523 udl_cmd_buf_alloc(struct udl_softc *sc, int flags)
524 {
525 struct udl_cmd_buf *cb;
526
527 UDL_LOCK(sc);
528 cb = udl_cmd_buf_alloc_locked(sc, flags);
529 UDL_UNLOCK(sc);
530 return (cb);
531 }
532
533 static void
udl_cmd_buf_send(struct udl_softc * sc,struct udl_cmd_buf * cb)534 udl_cmd_buf_send(struct udl_softc *sc, struct udl_cmd_buf *cb)
535 {
536 UDL_LOCK(sc);
537 if (sc->sc_gone) {
538 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_free, cb, entry);
539 } else {
540 /* mark end of command stack */
541 udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
542 udl_cmd_insert_int_1(cb, UDL_BULK_CMD_EOC);
543
544 TAILQ_INSERT_TAIL(&sc->sc_cmd_buf_pending, cb, entry);
545 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_0]);
546 usbd_transfer_start(sc->sc_xfer[UDL_BULK_WRITE_1]);
547 }
548 UDL_UNLOCK(sc);
549 }
550
551 static struct udl_cmd_buf *
udl_fb_synchronize_locked(struct udl_softc * sc)552 udl_fb_synchronize_locked(struct udl_softc *sc)
553 {
554 const uint32_t max = udl_get_fb_size(sc);
555
556 /* check if framebuffer is not ready */
557 if (sc->sc_fb_addr == NULL ||
558 sc->sc_fb_copy == NULL)
559 return (NULL);
560
561 while (sc->sc_sync_off < max) {
562 uint32_t delta = max - sc->sc_sync_off;
563
564 if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
565 delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
566 if (bcmp(sc->sc_fb_addr + sc->sc_sync_off, sc->sc_fb_copy + sc->sc_sync_off, delta) != 0) {
567 struct udl_cmd_buf *cb;
568
569 cb = udl_cmd_buf_alloc_locked(sc, M_NOWAIT);
570 if (cb == NULL)
571 goto done;
572 memcpy(sc->sc_fb_copy + sc->sc_sync_off,
573 sc->sc_fb_addr + sc->sc_sync_off, delta);
574 udl_cmd_insert_int_1(cb, UDL_BULK_SOC);
575 udl_cmd_insert_int_1(cb, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
576 udl_cmd_insert_int_3(cb, sc->sc_sync_off);
577 udl_cmd_insert_int_1(cb, delta / 2);
578 udl_cmd_insert_buf_le16(cb, sc->sc_fb_copy + sc->sc_sync_off, delta);
579 sc->sc_sync_off += delta;
580 return (cb);
581 } else {
582 sc->sc_sync_off += delta;
583 }
584 }
585 done:
586 return (NULL);
587 }
588
589 static void
udl_bulk_write_callback(struct usb_xfer * xfer,usb_error_t error)590 udl_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error)
591 {
592 struct udl_softc *sc = usbd_xfer_softc(xfer);
593 struct udl_cmd_head *phead = usbd_xfer_get_priv(xfer);
594 struct udl_cmd_buf *cb;
595 unsigned i;
596
597 switch (USB_GET_STATE(xfer)) {
598 case USB_ST_TRANSFERRED:
599 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
600 case USB_ST_SETUP:
601 tr_setup:
602 for (i = 0; i != UDL_CMD_MAX_FRAMES; i++) {
603 cb = TAILQ_FIRST(&sc->sc_cmd_buf_pending);
604 if (cb == NULL) {
605 cb = udl_fb_synchronize_locked(sc);
606 if (cb == NULL)
607 break;
608 } else {
609 TAILQ_REMOVE(&sc->sc_cmd_buf_pending, cb, entry);
610 }
611 TAILQ_INSERT_TAIL(phead, cb, entry);
612 usbd_xfer_set_frame_data(xfer, i, cb->buf, cb->off);
613 }
614 if (i != 0) {
615 usbd_xfer_set_frames(xfer, i);
616 usbd_transfer_submit(xfer);
617 }
618 break;
619 default:
620 TAILQ_CONCAT(&sc->sc_cmd_buf_free, phead, entry);
621 if (error != USB_ERR_CANCELLED) {
622 /* try clear stall first */
623 usbd_xfer_set_stall(xfer);
624 goto tr_setup;
625 }
626 break;
627 }
628 /* wakeup any waiters */
629 cv_signal(&sc->sc_cv);
630 }
631
632 static int
udl_power_save(struct udl_softc * sc,int on,int flags)633 udl_power_save(struct udl_softc *sc, int on, int flags)
634 {
635 struct udl_cmd_buf *cb;
636
637 /* get new buffer */
638 cb = udl_cmd_buf_alloc(sc, flags);
639 if (cb == NULL)
640 return (EAGAIN);
641
642 DPRINTF("screen %s\n", on ? "ON" : "OFF");
643
644 sc->sc_power_save = on ? 0 : 1;
645
646 if (on)
647 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
648 else
649 udl_cmd_write_reg_1(cb, UDL_REG_SCREEN, UDL_REG_SCREEN_OFF);
650
651 udl_cmd_write_reg_1(cb, UDL_REG_SYNC, 0xff);
652 udl_cmd_buf_send(sc, cb);
653 return (0);
654 }
655
656 static int
udl_ctrl_msg(struct udl_softc * sc,uint8_t rt,uint8_t r,uint16_t index,uint16_t value,uint8_t * buf,size_t len)657 udl_ctrl_msg(struct udl_softc *sc, uint8_t rt, uint8_t r,
658 uint16_t index, uint16_t value, uint8_t *buf, size_t len)
659 {
660 usb_device_request_t req;
661 int error;
662
663 req.bmRequestType = rt;
664 req.bRequest = r;
665 USETW(req.wIndex, index);
666 USETW(req.wValue, value);
667 USETW(req.wLength, len);
668
669 error = usbd_do_request_flags(sc->sc_udev, NULL,
670 &req, buf, 0, NULL, USB_DEFAULT_TIMEOUT);
671
672 DPRINTF("%s\n", usbd_errstr(error));
673
674 return (error);
675 }
676
677 static int
udl_poll(struct udl_softc * sc,uint32_t * buf)678 udl_poll(struct udl_softc *sc, uint32_t *buf)
679 {
680 uint32_t lbuf;
681 int error;
682
683 error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
684 UDL_CTRL_CMD_POLL, 0x0000, 0x0000, (uint8_t *)&lbuf, sizeof(lbuf));
685 if (error == USB_ERR_NORMAL_COMPLETION)
686 *buf = le32toh(lbuf);
687 return (error);
688 }
689
690 static int
udl_read_1(struct udl_softc * sc,uint16_t addr,uint8_t * buf)691 udl_read_1(struct udl_softc *sc, uint16_t addr, uint8_t *buf)
692 {
693 uint8_t lbuf[1];
694 int error;
695
696 error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
697 UDL_CTRL_CMD_READ_1, addr, 0x0000, lbuf, 1);
698 if (error == USB_ERR_NORMAL_COMPLETION)
699 *buf = *(uint8_t *)lbuf;
700 return (error);
701 }
702
703 static int
udl_write_1(struct udl_softc * sc,uint16_t addr,uint8_t buf)704 udl_write_1(struct udl_softc *sc, uint16_t addr, uint8_t buf)
705 {
706 int error;
707
708 error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
709 UDL_CTRL_CMD_WRITE_1, addr, 0x0000, &buf, 1);
710 return (error);
711 }
712
713 static int
udl_read_edid(struct udl_softc * sc,uint8_t * buf)714 udl_read_edid(struct udl_softc *sc, uint8_t *buf)
715 {
716 uint8_t lbuf[64];
717 uint16_t offset;
718 int error;
719
720 offset = 0;
721
722 error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
723 UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
724 if (error != USB_ERR_NORMAL_COMPLETION)
725 goto fail;
726 bcopy(lbuf + 1, buf + offset, 63);
727 offset += 63;
728
729 error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
730 UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
731 if (error != USB_ERR_NORMAL_COMPLETION)
732 goto fail;
733 bcopy(lbuf + 1, buf + offset, 63);
734 offset += 63;
735
736 error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
737 UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 3);
738 if (error != USB_ERR_NORMAL_COMPLETION)
739 goto fail;
740 bcopy(lbuf + 1, buf + offset, 2);
741 fail:
742 return (error);
743 }
744
745 static uint8_t
udl_lookup_mode(uint16_t hdisplay,uint16_t vdisplay,uint8_t hz,uint16_t chip,uint32_t clock)746 udl_lookup_mode(uint16_t hdisplay, uint16_t vdisplay, uint8_t hz,
747 uint16_t chip, uint32_t clock)
748 {
749 uint8_t idx;
750
751 /*
752 * Check first if we have a matching mode with pixelclock
753 */
754 for (idx = 0; idx != UDL_MAX_MODES; idx++) {
755 if ((udl_modes[idx].hdisplay == hdisplay) &&
756 (udl_modes[idx].vdisplay == vdisplay) &&
757 (udl_modes[idx].clock == clock) &&
758 (udl_modes[idx].chip <= chip)) {
759 return (idx);
760 }
761 }
762
763 /*
764 * If not, check for matching mode with update frequency
765 */
766 for (idx = 0; idx != UDL_MAX_MODES; idx++) {
767 if ((udl_modes[idx].hdisplay == hdisplay) &&
768 (udl_modes[idx].vdisplay == vdisplay) &&
769 (udl_modes[idx].hz == hz) &&
770 (udl_modes[idx].chip <= chip)) {
771 return (idx);
772 }
773 }
774 return (idx);
775 }
776
777 static void
udl_select_chip(struct udl_softc * sc,struct usb_attach_arg * uaa)778 udl_select_chip(struct udl_softc *sc, struct usb_attach_arg *uaa)
779 {
780 const char *pserial;
781
782 pserial = usb_get_serial(uaa->device);
783
784 sc->sc_chip = DL120;
785
786 if ((uaa->info.idVendor == USB_VENDOR_DISPLAYLINK) &&
787 (uaa->info.idProduct == USB_PRODUCT_DISPLAYLINK_WSDVI)) {
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 determine 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 * 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
udl_set_enc_key(struct udl_softc * sc,uint8_t * buf,uint8_t len)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
udl_fbmem_alloc(struct udl_softc * sc)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
udl_cmd_insert_int_1(struct udl_cmd_buf * cb,uint8_t value)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
udl_cmd_insert_int_3(struct udl_cmd_buf * cb,uint32_t value)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
udl_cmd_insert_buf_le16(struct udl_cmd_buf * cb,const uint8_t * buf,uint32_t len)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
udl_cmd_write_reg_1(struct udl_cmd_buf * cb,uint8_t reg,uint8_t val)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
udl_cmd_write_reg_3(struct udl_cmd_buf * cb,uint8_t reg,uint32_t val)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
udl_init_chip(struct udl_softc * sc)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
udl_init_fb_offsets(struct udl_cmd_buf * cb,uint32_t start16,uint32_t stride16,uint32_t start8,uint32_t stride8)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
udl_init_resolution(struct udl_softc * sc)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
udl_select_mode(struct udl_softc * sc)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
udl_cmd_write_buf_le16(struct udl_softc * sc,const uint8_t * buf,uint32_t off,uint8_t pixels,int flags)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
udl_cmd_buf_copy_le16(struct udl_softc * sc,uint32_t src,uint32_t dst,uint8_t pixels,int flags)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 }
1154