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sys/arm/ti/am335x/am335x_lcd.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright 2013 Oleksandr Tymoshenko <gonzo@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_syscons.h" 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/clock.h> 38 #include <sys/eventhandler.h> 39 #include <sys/time.h> 40 #include <sys/bus.h> 41 #include <sys/lock.h> 42 #include <sys/mutex.h> 43 #include <sys/resource.h> 44 #include <sys/rman.h> 45 #include <sys/sysctl.h> 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 #include <sys/fbio.h> 49 #include <sys/consio.h> 50 51 #include <machine/bus.h> 52 53 #include <dev/extres/clk/clk.h> 54 55 #include <dev/fdt/fdt_common.h> 56 #include <dev/ofw/openfirm.h> 57 #include <dev/ofw/ofw_bus.h> 58 #include <dev/ofw/ofw_bus_subr.h> 59 60 #include <dev/videomode/videomode.h> 61 #include <dev/videomode/edidvar.h> 62 63 #include <dev/fb/fbreg.h> 64 #ifdef DEV_SC 65 #include <dev/syscons/syscons.h> 66 #else /* VT */ 67 #include <dev/vt/vt.h> 68 #endif 69 70 #include <arm/ti/ti_sysc.h> 71 #include <arm/ti/ti_scm.h> 72 73 #include "am335x_lcd.h" 74 #include "am335x_pwm.h" 75 76 #include "fb_if.h" 77 #include "hdmi_if.h" 78 79 #define LCD_PID 0x00 80 #define LCD_CTRL 0x04 81 #define CTRL_DIV_MASK 0xff 82 #define CTRL_DIV_SHIFT 8 83 #define CTRL_AUTO_UFLOW_RESTART (1 << 1) 84 #define CTRL_RASTER_MODE 1 85 #define CTRL_LIDD_MODE 0 86 #define LCD_LIDD_CTRL 0x0C 87 #define LCD_LIDD_CS0_CONF 0x10 88 #define LCD_LIDD_CS0_ADDR 0x14 89 #define LCD_LIDD_CS0_DATA 0x18 90 #define LCD_LIDD_CS1_CONF 0x1C 91 #define LCD_LIDD_CS1_ADDR 0x20 92 #define LCD_LIDD_CS1_DATA 0x24 93 #define LCD_RASTER_CTRL 0x28 94 #define RASTER_CTRL_TFT24_UNPACKED (1 << 26) 95 #define RASTER_CTRL_TFT24 (1 << 25) 96 #define RASTER_CTRL_STN565 (1 << 24) 97 #define RASTER_CTRL_TFTPMAP (1 << 23) 98 #define RASTER_CTRL_NIBMODE (1 << 22) 99 #define RASTER_CTRL_PALMODE_SHIFT 20 100 #define PALETTE_PALETTE_AND_DATA 0x00 101 #define PALETTE_PALETTE_ONLY 0x01 102 #define PALETTE_DATA_ONLY 0x02 103 #define RASTER_CTRL_REQDLY_SHIFT 12 104 #define RASTER_CTRL_MONO8B (1 << 9) 105 #define RASTER_CTRL_RBORDER (1 << 8) 106 #define RASTER_CTRL_LCDTFT (1 << 7) 107 #define RASTER_CTRL_LCDBW (1 << 1) 108 #define RASTER_CTRL_LCDEN (1 << 0) 109 #define LCD_RASTER_TIMING_0 0x2C 110 #define RASTER_TIMING_0_HBP_SHIFT 24 111 #define RASTER_TIMING_0_HFP_SHIFT 16 112 #define RASTER_TIMING_0_HSW_SHIFT 10 113 #define RASTER_TIMING_0_PPLLSB_SHIFT 4 114 #define RASTER_TIMING_0_PPLMSB_SHIFT 3 115 #define LCD_RASTER_TIMING_1 0x30 116 #define RASTER_TIMING_1_VBP_SHIFT 24 117 #define RASTER_TIMING_1_VFP_SHIFT 16 118 #define RASTER_TIMING_1_VSW_SHIFT 10 119 #define RASTER_TIMING_1_LPP_SHIFT 0 120 #define LCD_RASTER_TIMING_2 0x34 121 #define RASTER_TIMING_2_HSWHI_SHIFT 27 122 #define RASTER_TIMING_2_LPP_B10_SHIFT 26 123 #define RASTER_TIMING_2_PHSVS (1 << 25) 124 #define RASTER_TIMING_2_PHSVS_RISE (1 << 24) 125 #define RASTER_TIMING_2_PHSVS_FALL (0 << 24) 126 #define RASTER_TIMING_2_IOE (1 << 23) 127 #define RASTER_TIMING_2_IPC (1 << 22) 128 #define RASTER_TIMING_2_IHS (1 << 21) 129 #define RASTER_TIMING_2_IVS (1 << 20) 130 #define RASTER_TIMING_2_ACBI_SHIFT 16 131 #define RASTER_TIMING_2_ACB_SHIFT 8 132 #define RASTER_TIMING_2_HBPHI_SHIFT 4 133 #define RASTER_TIMING_2_HFPHI_SHIFT 0 134 #define LCD_RASTER_SUBPANEL 0x38 135 #define LCD_RASTER_SUBPANEL2 0x3C 136 #define LCD_LCDDMA_CTRL 0x40 137 #define LCDDMA_CTRL_DMA_MASTER_PRIO_SHIFT 16 138 #define LCDDMA_CTRL_TH_FIFO_RDY_SHIFT 8 139 #define LCDDMA_CTRL_BURST_SIZE_SHIFT 4 140 #define LCDDMA_CTRL_BYTES_SWAP (1 << 3) 141 #define LCDDMA_CTRL_BE (1 << 1) 142 #define LCDDMA_CTRL_FB0_ONLY 0 143 #define LCDDMA_CTRL_FB0_FB1 (1 << 0) 144 #define LCD_LCDDMA_FB0_BASE 0x44 145 #define LCD_LCDDMA_FB0_CEILING 0x48 146 #define LCD_LCDDMA_FB1_BASE 0x4C 147 #define LCD_LCDDMA_FB1_CEILING 0x50 148 #define LCD_SYSCONFIG 0x54 149 #define SYSCONFIG_STANDBY_FORCE (0 << 4) 150 #define SYSCONFIG_STANDBY_NONE (1 << 4) 151 #define SYSCONFIG_STANDBY_SMART (2 << 4) 152 #define SYSCONFIG_IDLE_FORCE (0 << 2) 153 #define SYSCONFIG_IDLE_NONE (1 << 2) 154 #define SYSCONFIG_IDLE_SMART (2 << 2) 155 #define LCD_IRQSTATUS_RAW 0x58 156 #define LCD_IRQSTATUS 0x5C 157 #define LCD_IRQENABLE_SET 0x60 158 #define LCD_IRQENABLE_CLEAR 0x64 159 #define IRQ_EOF1 (1 << 9) 160 #define IRQ_EOF0 (1 << 8) 161 #define IRQ_PL (1 << 6) 162 #define IRQ_FUF (1 << 5) 163 #define IRQ_ACB (1 << 3) 164 #define IRQ_SYNC_LOST (1 << 2) 165 #define IRQ_RASTER_DONE (1 << 1) 166 #define IRQ_FRAME_DONE (1 << 0) 167 #define LCD_END_OF_INT_IND 0x68 168 #define LCD_CLKC_ENABLE 0x6C 169 #define CLKC_ENABLE_DMA (1 << 2) 170 #define CLKC_ENABLE_LDID (1 << 1) 171 #define CLKC_ENABLE_CORE (1 << 0) 172 #define LCD_CLKC_RESET 0x70 173 #define CLKC_RESET_MAIN (1 << 3) 174 #define CLKC_RESET_DMA (1 << 2) 175 #define CLKC_RESET_LDID (1 << 1) 176 #define CLKC_RESET_CORE (1 << 0) 177 178 #define LCD_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 179 #define LCD_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 180 #define LCD_LOCK_INIT(_sc) mtx_init(&(_sc)->sc_mtx, \ 181 device_get_nameunit(_sc->sc_dev), "am335x_lcd", MTX_DEF) 182 #define LCD_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx); 183 184 #define LCD_READ4(_sc, reg) bus_read_4((_sc)->sc_mem_res, reg); 185 #define LCD_WRITE4(_sc, reg, value) \ 186 bus_write_4((_sc)->sc_mem_res, reg, value); 187 188 /* Backlight is controlled by eCAS interface on PWM unit 0 */ 189 #define PWM_UNIT 0 190 #define PWM_PERIOD 100 191 192 #define MODE_HBP(mode) ((mode)->htotal - (mode)->hsync_end) 193 #define MODE_HFP(mode) ((mode)->hsync_start - (mode)->hdisplay) 194 #define MODE_HSW(mode) ((mode)->hsync_end - (mode)->hsync_start) 195 #define MODE_VBP(mode) ((mode)->vtotal - (mode)->vsync_end) 196 #define MODE_VFP(mode) ((mode)->vsync_start - (mode)->vdisplay) 197 #define MODE_VSW(mode) ((mode)->vsync_end - (mode)->vsync_start) 198 199 #define MAX_PIXEL_CLOCK 126000 200 #define MAX_BANDWIDTH (1280*1024*60) 201 202 struct am335x_lcd_softc { 203 device_t sc_dev; 204 struct fb_info sc_fb_info; 205 struct resource *sc_mem_res; 206 struct resource *sc_irq_res; 207 void *sc_intr_hl; 208 struct mtx sc_mtx; 209 int sc_backlight; 210 struct sysctl_oid *sc_oid; 211 212 struct panel_info sc_panel; 213 214 /* Framebuffer */ 215 bus_dma_tag_t sc_dma_tag; 216 bus_dmamap_t sc_dma_map; 217 size_t sc_fb_size; 218 bus_addr_t sc_fb_phys; 219 uint8_t *sc_fb_base; 220 221 /* HDMI framer */ 222 phandle_t sc_hdmi_framer; 223 eventhandler_tag sc_hdmi_evh; 224 225 /* Clock */ 226 clk_t sc_clk_dpll_disp_ck; 227 }; 228 229 static void 230 am335x_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 231 { 232 bus_addr_t *addr; 233 234 if (err) 235 return; 236 237 addr = (bus_addr_t*)arg; 238 *addr = segs[0].ds_addr; 239 } 240 241 static uint32_t 242 am335x_lcd_calc_divisor(uint32_t reference, uint32_t freq) 243 { 244 uint32_t div, i; 245 uint32_t delta, min_delta; 246 247 min_delta = freq; 248 div = 255; 249 250 /* Raster mode case: divisors are in range from 2 to 255 */ 251 for (i = 2; i < 255; i++) { 252 delta = abs(reference/i - freq); 253 if (delta < min_delta) { 254 div = i; 255 min_delta = delta; 256 } 257 } 258 259 return (div); 260 } 261 262 static int 263 am335x_lcd_sysctl_backlight(SYSCTL_HANDLER_ARGS) 264 { 265 struct am335x_lcd_softc *sc = (struct am335x_lcd_softc*)arg1; 266 int error; 267 int backlight; 268 269 backlight = sc->sc_backlight; 270 error = sysctl_handle_int(oidp, &backlight, 0, req); 271 272 if (error != 0 || req->newptr == NULL) 273 return (error); 274 275 if (backlight < 0) 276 backlight = 0; 277 if (backlight > 100) 278 backlight = 100; 279 280 LCD_LOCK(sc); 281 error = am335x_pwm_config_ecap(PWM_UNIT, PWM_PERIOD, 282 backlight*PWM_PERIOD/100); 283 if (error == 0) 284 sc->sc_backlight = backlight; 285 LCD_UNLOCK(sc); 286 287 return (error); 288 } 289 290 static uint32_t 291 am335x_mode_vrefresh(const struct videomode *mode) 292 { 293 uint32_t refresh; 294 295 /* Calculate vertical refresh rate */ 296 refresh = (mode->dot_clock * 1000 / mode->htotal); 297 refresh = (refresh + mode->vtotal / 2) / mode->vtotal; 298 299 if (mode->flags & VID_INTERLACE) 300 refresh *= 2; 301 if (mode->flags & VID_DBLSCAN) 302 refresh /= 2; 303 304 return refresh; 305 } 306 307 static int 308 am335x_mode_is_valid(const struct videomode *mode) 309 { 310 uint32_t hbp, hfp, hsw; 311 uint32_t vbp, vfp, vsw; 312 313 if (mode->dot_clock > MAX_PIXEL_CLOCK) 314 return (0); 315 316 if (mode->hdisplay & 0xf) 317 return (0); 318 319 if (mode->vdisplay > 2048) 320 return (0); 321 322 /* Check ranges for timing parameters */ 323 hbp = MODE_HBP(mode) - 1; 324 hfp = MODE_HFP(mode) - 1; 325 hsw = MODE_HSW(mode) - 1; 326 vbp = MODE_VBP(mode); 327 vfp = MODE_VFP(mode); 328 vsw = MODE_VSW(mode) - 1; 329 330 if (hbp > 0x3ff) 331 return (0); 332 if (hfp > 0x3ff) 333 return (0); 334 if (hsw > 0x3ff) 335 return (0); 336 337 if (vbp > 0xff) 338 return (0); 339 if (vfp > 0xff) 340 return (0); 341 if (vsw > 0x3f) 342 return (0); 343 if (mode->vdisplay*mode->hdisplay*am335x_mode_vrefresh(mode) 344 > MAX_BANDWIDTH) 345 return (0); 346 347 return (1); 348 } 349 350 static void 351 am335x_read_hdmi_property(device_t dev) 352 { 353 phandle_t node, xref; 354 phandle_t endpoint; 355 phandle_t hdmi_xref; 356 struct am335x_lcd_softc *sc; 357 358 sc = device_get_softc(dev); 359 node = ofw_bus_get_node(dev); 360 sc->sc_hdmi_framer = 0; 361 362 /* 363 * Old FreeBSD way of referencing to HDMI framer 364 */ 365 if (OF_getencprop(node, "hdmi", &hdmi_xref, sizeof(hdmi_xref)) != -1) { 366 sc->sc_hdmi_framer = hdmi_xref; 367 return; 368 } 369 370 /* 371 * Use bindings described in Linux docs: 372 * bindings/media/video-interfaces.txt 373 * We assume that the only endpoint in LCDC node 374 * is HDMI framer. 375 */ 376 node = ofw_bus_find_child(node, "port"); 377 378 /* No media bindings */ 379 if (node == 0) 380 return; 381 382 for (endpoint = OF_child(node); endpoint != 0; endpoint = OF_peer(endpoint)) { 383 if (OF_getencprop(endpoint, "remote-endpoint", &xref, sizeof(xref)) != -1) { 384 /* port/port@0/endpoint@0 */ 385 node = OF_node_from_xref(xref); 386 /* port/port@0 */ 387 node = OF_parent(node); 388 /* port */ 389 node = OF_parent(node); 390 /* actual owner of port, in our case HDMI framer */ 391 sc->sc_hdmi_framer = OF_xref_from_node(OF_parent(node)); 392 if (sc->sc_hdmi_framer != 0) 393 return; 394 } 395 } 396 } 397 398 static int 399 am335x_read_property(device_t dev, phandle_t node, const char *name, uint32_t *val) 400 { 401 pcell_t cell; 402 403 if ((OF_getencprop(node, name, &cell, sizeof(cell))) <= 0) { 404 device_printf(dev, "missing '%s' attribute in LCD panel info\n", 405 name); 406 return (ENXIO); 407 } 408 409 *val = cell; 410 411 return (0); 412 } 413 414 static int 415 am335x_read_timing(device_t dev, phandle_t node, struct panel_info *panel) 416 { 417 int error; 418 phandle_t timings_node, timing_node, native; 419 420 timings_node = ofw_bus_find_child(node, "display-timings"); 421 if (timings_node == 0) { 422 device_printf(dev, "no \"display-timings\" node\n"); 423 return (-1); 424 } 425 426 if (OF_searchencprop(timings_node, "native-mode", &native, 427 sizeof(native)) == -1) { 428 device_printf(dev, "no \"native-mode\" reference in \"timings\" node\n"); 429 return (-1); 430 } 431 432 timing_node = OF_node_from_xref(native); 433 434 error = 0; 435 if ((error = am335x_read_property(dev, timing_node, 436 "hactive", &panel->panel_width))) 437 goto out; 438 439 if ((error = am335x_read_property(dev, timing_node, 440 "vactive", &panel->panel_height))) 441 goto out; 442 443 if ((error = am335x_read_property(dev, timing_node, 444 "hfront-porch", &panel->panel_hfp))) 445 goto out; 446 447 if ((error = am335x_read_property(dev, timing_node, 448 "hback-porch", &panel->panel_hbp))) 449 goto out; 450 451 if ((error = am335x_read_property(dev, timing_node, 452 "hsync-len", &panel->panel_hsw))) 453 goto out; 454 455 if ((error = am335x_read_property(dev, timing_node, 456 "vfront-porch", &panel->panel_vfp))) 457 goto out; 458 459 if ((error = am335x_read_property(dev, timing_node, 460 "vback-porch", &panel->panel_vbp))) 461 goto out; 462 463 if ((error = am335x_read_property(dev, timing_node, 464 "vsync-len", &panel->panel_vsw))) 465 goto out; 466 467 if ((error = am335x_read_property(dev, timing_node, 468 "clock-frequency", &panel->panel_pxl_clk))) 469 goto out; 470 471 if ((error = am335x_read_property(dev, timing_node, 472 "pixelclk-active", &panel->pixelclk_active))) 473 goto out; 474 475 if ((error = am335x_read_property(dev, timing_node, 476 "hsync-active", &panel->hsync_active))) 477 goto out; 478 479 if ((error = am335x_read_property(dev, timing_node, 480 "vsync-active", &panel->vsync_active))) 481 goto out; 482 483 out: 484 return (error); 485 } 486 487 static int 488 am335x_read_panel_info(device_t dev, phandle_t node, struct panel_info *panel) 489 { 490 phandle_t panel_info_node; 491 492 panel_info_node = ofw_bus_find_child(node, "panel-info"); 493 if (panel_info_node == 0) 494 return (-1); 495 496 am335x_read_property(dev, panel_info_node, 497 "ac-bias", &panel->ac_bias); 498 499 am335x_read_property(dev, panel_info_node, 500 "ac-bias-intrpt", &panel->ac_bias_intrpt); 501 502 am335x_read_property(dev, panel_info_node, 503 "dma-burst-sz", &panel->dma_burst_sz); 504 505 am335x_read_property(dev, panel_info_node, 506 "bpp", &panel->bpp); 507 508 am335x_read_property(dev, panel_info_node, 509 "fdd", &panel->fdd); 510 511 am335x_read_property(dev, panel_info_node, 512 "sync-edge", &panel->sync_edge); 513 514 am335x_read_property(dev, panel_info_node, 515 "sync-ctrl", &panel->sync_ctrl); 516 517 return (0); 518 } 519 520 static void 521 am335x_lcd_intr(void *arg) 522 { 523 struct am335x_lcd_softc *sc = arg; 524 uint32_t reg; 525 526 reg = LCD_READ4(sc, LCD_IRQSTATUS); 527 LCD_WRITE4(sc, LCD_IRQSTATUS, reg); 528 /* Read value back to make sure it reached the hardware */ 529 reg = LCD_READ4(sc, LCD_IRQSTATUS); 530 531 if (reg & IRQ_SYNC_LOST) { 532 reg = LCD_READ4(sc, LCD_RASTER_CTRL); 533 reg &= ~RASTER_CTRL_LCDEN; 534 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 535 536 reg = LCD_READ4(sc, LCD_RASTER_CTRL); 537 reg |= RASTER_CTRL_LCDEN; 538 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 539 goto done; 540 } 541 542 if (reg & IRQ_PL) { 543 reg = LCD_READ4(sc, LCD_RASTER_CTRL); 544 reg &= ~RASTER_CTRL_LCDEN; 545 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 546 547 reg = LCD_READ4(sc, LCD_RASTER_CTRL); 548 reg |= RASTER_CTRL_LCDEN; 549 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 550 goto done; 551 } 552 553 if (reg & IRQ_EOF0) { 554 LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys); 555 LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 556 reg &= ~IRQ_EOF0; 557 } 558 559 if (reg & IRQ_EOF1) { 560 LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys); 561 LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 562 reg &= ~IRQ_EOF1; 563 } 564 565 if (reg & IRQ_FUF) { 566 /* TODO: Handle FUF */ 567 } 568 569 if (reg & IRQ_ACB) { 570 /* TODO: Handle ACB */ 571 } 572 573 done: 574 LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0); 575 /* Read value back to make sure it reached the hardware */ 576 reg = LCD_READ4(sc, LCD_END_OF_INT_IND); 577 } 578 579 static const struct videomode * 580 am335x_lcd_pick_mode(struct edid_info *ei) 581 { 582 const struct videomode *videomode; 583 const struct videomode *m; 584 int n; 585 586 /* Get standard VGA as default */ 587 videomode = NULL; 588 589 /* 590 * Pick a mode. 591 */ 592 if (ei->edid_preferred_mode != NULL) { 593 if (am335x_mode_is_valid(ei->edid_preferred_mode)) 594 videomode = ei->edid_preferred_mode; 595 } 596 597 if (videomode == NULL) { 598 m = ei->edid_modes; 599 600 sort_modes(ei->edid_modes, 601 &ei->edid_preferred_mode, 602 ei->edid_nmodes); 603 for (n = 0; n < ei->edid_nmodes; n++) 604 if (am335x_mode_is_valid(&m[n])) { 605 videomode = &m[n]; 606 break; 607 } 608 } 609 610 return videomode; 611 } 612 613 static int 614 am335x_lcd_configure(struct am335x_lcd_softc *sc) 615 { 616 int div; 617 uint32_t reg, timing0, timing1, timing2; 618 uint32_t burst_log; 619 size_t dma_size; 620 uint32_t hbp, hfp, hsw; 621 uint32_t vbp, vfp, vsw; 622 uint32_t width, height; 623 uint64_t ref_freq; 624 int err; 625 626 /* 627 * try to adjust clock to get double of requested frequency 628 * HDMI/DVI displays are very sensitive to error in frequncy value 629 */ 630 631 err = clk_set_freq(sc->sc_clk_dpll_disp_ck, sc->sc_panel.panel_pxl_clk*2, 632 CLK_SET_ROUND_ANY); 633 if (err != 0) { 634 device_printf(sc->sc_dev, "can't set source frequency\n"); 635 return (ENXIO); 636 } 637 638 err = clk_get_freq(sc->sc_clk_dpll_disp_ck, &ref_freq); 639 if (err != 0) { 640 device_printf(sc->sc_dev, "can't get reference frequency\n"); 641 return (ENXIO); 642 } 643 644 /* Panel initialization */ 645 dma_size = round_page(sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8); 646 647 /* 648 * Now allocate framebuffer memory 649 */ 650 err = bus_dma_tag_create( 651 bus_get_dma_tag(sc->sc_dev), 652 4, 0, /* alignment, boundary */ 653 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ 654 BUS_SPACE_MAXADDR, /* highaddr */ 655 NULL, NULL, /* filter, filterarg */ 656 dma_size, 1, /* maxsize, nsegments */ 657 dma_size, 0, /* maxsegsize, flags */ 658 NULL, NULL, /* lockfunc, lockarg */ 659 &sc->sc_dma_tag); 660 if (err) 661 goto done; 662 663 err = bus_dmamem_alloc(sc->sc_dma_tag, (void **)&sc->sc_fb_base, 664 BUS_DMA_COHERENT, &sc->sc_dma_map); 665 666 if (err) { 667 device_printf(sc->sc_dev, "cannot allocate framebuffer\n"); 668 goto done; 669 } 670 671 err = bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, sc->sc_fb_base, 672 dma_size, am335x_fb_dmamap_cb, &sc->sc_fb_phys, BUS_DMA_NOWAIT); 673 674 if (err) { 675 device_printf(sc->sc_dev, "cannot load DMA map\n"); 676 goto done; 677 } 678 679 /* Make sure it's blank */ 680 memset(sc->sc_fb_base, 0x0, dma_size); 681 682 /* Calculate actual FB Size */ 683 sc->sc_fb_size = sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8; 684 685 /* Only raster mode is supported */ 686 reg = CTRL_RASTER_MODE; 687 div = am335x_lcd_calc_divisor(ref_freq, sc->sc_panel.panel_pxl_clk); 688 reg |= (div << CTRL_DIV_SHIFT); 689 LCD_WRITE4(sc, LCD_CTRL, reg); 690 691 /* Set timing */ 692 timing0 = timing1 = timing2 = 0; 693 694 hbp = sc->sc_panel.panel_hbp - 1; 695 hfp = sc->sc_panel.panel_hfp - 1; 696 hsw = sc->sc_panel.panel_hsw - 1; 697 698 vbp = sc->sc_panel.panel_vbp; 699 vfp = sc->sc_panel.panel_vfp; 700 vsw = sc->sc_panel.panel_vsw - 1; 701 702 height = sc->sc_panel.panel_height - 1; 703 width = sc->sc_panel.panel_width - 1; 704 705 /* Horizontal back porch */ 706 timing0 |= (hbp & 0xff) << RASTER_TIMING_0_HBP_SHIFT; 707 timing2 |= ((hbp >> 8) & 3) << RASTER_TIMING_2_HBPHI_SHIFT; 708 /* Horizontal front porch */ 709 timing0 |= (hfp & 0xff) << RASTER_TIMING_0_HFP_SHIFT; 710 timing2 |= ((hfp >> 8) & 3) << RASTER_TIMING_2_HFPHI_SHIFT; 711 /* Horizontal sync width */ 712 timing0 |= (hsw & 0x3f) << RASTER_TIMING_0_HSW_SHIFT; 713 timing2 |= ((hsw >> 6) & 0xf) << RASTER_TIMING_2_HSWHI_SHIFT; 714 715 /* Vertical back porch, front porch, sync width */ 716 timing1 |= (vbp & 0xff) << RASTER_TIMING_1_VBP_SHIFT; 717 timing1 |= (vfp & 0xff) << RASTER_TIMING_1_VFP_SHIFT; 718 timing1 |= (vsw & 0x3f) << RASTER_TIMING_1_VSW_SHIFT; 719 720 /* Pixels per line */ 721 timing0 |= ((width >> 10) & 1) 722 << RASTER_TIMING_0_PPLMSB_SHIFT; 723 timing0 |= ((width >> 4) & 0x3f) 724 << RASTER_TIMING_0_PPLLSB_SHIFT; 725 726 /* Lines per panel */ 727 timing1 |= (height & 0x3ff) 728 << RASTER_TIMING_1_LPP_SHIFT; 729 timing2 |= ((height >> 10 ) & 1) 730 << RASTER_TIMING_2_LPP_B10_SHIFT; 731 732 /* clock signal settings */ 733 if (sc->sc_panel.sync_ctrl) 734 timing2 |= RASTER_TIMING_2_PHSVS; 735 if (sc->sc_panel.sync_edge) 736 timing2 |= RASTER_TIMING_2_PHSVS_RISE; 737 else 738 timing2 |= RASTER_TIMING_2_PHSVS_FALL; 739 if (sc->sc_panel.hsync_active == 0) 740 timing2 |= RASTER_TIMING_2_IHS; 741 if (sc->sc_panel.vsync_active == 0) 742 timing2 |= RASTER_TIMING_2_IVS; 743 if (sc->sc_panel.pixelclk_active == 0) 744 timing2 |= RASTER_TIMING_2_IPC; 745 746 /* AC bias */ 747 timing2 |= (sc->sc_panel.ac_bias << RASTER_TIMING_2_ACB_SHIFT); 748 timing2 |= (sc->sc_panel.ac_bias_intrpt << RASTER_TIMING_2_ACBI_SHIFT); 749 750 LCD_WRITE4(sc, LCD_RASTER_TIMING_0, timing0); 751 LCD_WRITE4(sc, LCD_RASTER_TIMING_1, timing1); 752 LCD_WRITE4(sc, LCD_RASTER_TIMING_2, timing2); 753 754 /* DMA settings */ 755 reg = LCDDMA_CTRL_FB0_FB1; 756 /* Find power of 2 for current burst size */ 757 switch (sc->sc_panel.dma_burst_sz) { 758 case 1: 759 burst_log = 0; 760 break; 761 case 2: 762 burst_log = 1; 763 break; 764 case 4: 765 burst_log = 2; 766 break; 767 case 8: 768 burst_log = 3; 769 break; 770 case 16: 771 default: 772 burst_log = 4; 773 break; 774 } 775 reg |= (burst_log << LCDDMA_CTRL_BURST_SIZE_SHIFT); 776 /* XXX: FIFO TH */ 777 reg |= (0 << LCDDMA_CTRL_TH_FIFO_RDY_SHIFT); 778 LCD_WRITE4(sc, LCD_LCDDMA_CTRL, reg); 779 780 LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys); 781 LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 782 LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys); 783 LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 784 785 /* Enable LCD */ 786 reg = RASTER_CTRL_LCDTFT; 787 reg |= (sc->sc_panel.fdd << RASTER_CTRL_REQDLY_SHIFT); 788 reg |= (PALETTE_DATA_ONLY << RASTER_CTRL_PALMODE_SHIFT); 789 if (sc->sc_panel.bpp >= 24) 790 reg |= RASTER_CTRL_TFT24; 791 if (sc->sc_panel.bpp == 32) 792 reg |= RASTER_CTRL_TFT24_UNPACKED; 793 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 794 795 LCD_WRITE4(sc, LCD_CLKC_ENABLE, 796 CLKC_ENABLE_DMA | CLKC_ENABLE_LDID | CLKC_ENABLE_CORE); 797 798 LCD_WRITE4(sc, LCD_CLKC_RESET, CLKC_RESET_MAIN); 799 DELAY(100); 800 LCD_WRITE4(sc, LCD_CLKC_RESET, 0); 801 802 reg = IRQ_EOF1 | IRQ_EOF0 | IRQ_FUF | IRQ_PL | 803 IRQ_ACB | IRQ_SYNC_LOST | IRQ_RASTER_DONE | 804 IRQ_FRAME_DONE; 805 LCD_WRITE4(sc, LCD_IRQENABLE_SET, reg); 806 807 reg = LCD_READ4(sc, LCD_RASTER_CTRL); 808 reg |= RASTER_CTRL_LCDEN; 809 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 810 811 LCD_WRITE4(sc, LCD_SYSCONFIG, 812 SYSCONFIG_STANDBY_SMART | SYSCONFIG_IDLE_SMART); 813 814 sc->sc_fb_info.fb_name = device_get_nameunit(sc->sc_dev); 815 sc->sc_fb_info.fb_vbase = (intptr_t)sc->sc_fb_base; 816 sc->sc_fb_info.fb_pbase = sc->sc_fb_phys; 817 sc->sc_fb_info.fb_size = sc->sc_fb_size; 818 sc->sc_fb_info.fb_bpp = sc->sc_fb_info.fb_depth = sc->sc_panel.bpp; 819 sc->sc_fb_info.fb_stride = sc->sc_panel.panel_width*sc->sc_panel.bpp / 8; 820 sc->sc_fb_info.fb_width = sc->sc_panel.panel_width; 821 sc->sc_fb_info.fb_height = sc->sc_panel.panel_height; 822 823 #ifdef DEV_SC 824 err = (sc_attach_unit(device_get_unit(sc->sc_dev), 825 device_get_flags(sc->sc_dev) | SC_AUTODETECT_KBD)); 826 827 if (err) { 828 device_printf(sc->sc_dev, "failed to attach syscons\n"); 829 goto fail; 830 } 831 832 am335x_lcd_syscons_setup((vm_offset_t)sc->sc_fb_base, sc->sc_fb_phys, &panel); 833 #else /* VT */ 834 device_t fbd = device_add_child(sc->sc_dev, "fbd", 835 device_get_unit(sc->sc_dev)); 836 if (fbd != NULL) { 837 if (device_probe_and_attach(fbd) != 0) 838 device_printf(sc->sc_dev, "failed to attach fbd device\n"); 839 } else 840 device_printf(sc->sc_dev, "failed to add fbd child\n"); 841 #endif 842 843 done: 844 return (err); 845 } 846 847 static void 848 am335x_lcd_hdmi_event(void *arg, device_t hdmi, int event) 849 { 850 struct am335x_lcd_softc *sc; 851 const struct videomode *videomode; 852 struct videomode hdmi_mode; 853 device_t hdmi_dev; 854 uint8_t *edid; 855 uint32_t edid_len; 856 struct edid_info ei; 857 858 sc = arg; 859 860 /* Nothing to work with */ 861 if (!sc->sc_hdmi_framer) { 862 device_printf(sc->sc_dev, "HDMI event without HDMI framer set\n"); 863 return; 864 } 865 866 hdmi_dev = OF_device_from_xref(sc->sc_hdmi_framer); 867 if (!hdmi_dev) { 868 device_printf(sc->sc_dev, "no actual device for \"hdmi\" property\n"); 869 return; 870 } 871 872 edid = NULL; 873 edid_len = 0; 874 if (HDMI_GET_EDID(hdmi_dev, &edid, &edid_len) != 0) { 875 device_printf(sc->sc_dev, "failed to get EDID info from HDMI framer\n"); 876 return; 877 } 878 879 videomode = NULL; 880 881 if (edid_parse(edid, &ei) == 0) { 882 edid_print(&ei); 883 videomode = am335x_lcd_pick_mode(&ei); 884 } else 885 device_printf(sc->sc_dev, "failed to parse EDID\n"); 886 887 /* Use standard VGA as fallback */ 888 if (videomode == NULL) 889 videomode = pick_mode_by_ref(640, 480, 60); 890 891 if (videomode == NULL) { 892 device_printf(sc->sc_dev, "failed to find usable videomode"); 893 return; 894 } 895 896 device_printf(sc->sc_dev, "detected videomode: %dx%d @ %dKHz\n", videomode->hdisplay, 897 videomode->vdisplay, am335x_mode_vrefresh(videomode)); 898 899 sc->sc_panel.panel_width = videomode->hdisplay; 900 sc->sc_panel.panel_height = videomode->vdisplay; 901 sc->sc_panel.panel_hfp = videomode->hsync_start - videomode->hdisplay; 902 sc->sc_panel.panel_hbp = videomode->htotal - videomode->hsync_end; 903 sc->sc_panel.panel_hsw = videomode->hsync_end - videomode->hsync_start; 904 sc->sc_panel.panel_vfp = videomode->vsync_start - videomode->vdisplay; 905 sc->sc_panel.panel_vbp = videomode->vtotal - videomode->vsync_end; 906 sc->sc_panel.panel_vsw = videomode->vsync_end - videomode->vsync_start; 907 sc->sc_panel.pixelclk_active = 1; 908 909 /* logic for HSYNC should be reversed */ 910 if (videomode->flags & VID_NHSYNC) 911 sc->sc_panel.hsync_active = 1; 912 else 913 sc->sc_panel.hsync_active = 0; 914 915 if (videomode->flags & VID_NVSYNC) 916 sc->sc_panel.vsync_active = 0; 917 else 918 sc->sc_panel.vsync_active = 1; 919 920 sc->sc_panel.panel_pxl_clk = videomode->dot_clock * 1000; 921 922 am335x_lcd_configure(sc); 923 924 memcpy(&hdmi_mode, videomode, sizeof(hdmi_mode)); 925 hdmi_mode.hskew = videomode->hsync_end - videomode->hsync_start; 926 hdmi_mode.flags |= VID_HSKEW; 927 928 HDMI_SET_VIDEOMODE(hdmi_dev, &hdmi_mode); 929 } 930 931 static int 932 am335x_lcd_probe(device_t dev) 933 { 934 #ifdef DEV_SC 935 int err; 936 #endif 937 938 if (!ofw_bus_status_okay(dev)) 939 return (ENXIO); 940 941 if (!ofw_bus_is_compatible(dev, "ti,am33xx-tilcdc")) 942 return (ENXIO); 943 944 device_set_desc(dev, "AM335x LCD controller"); 945 946 #ifdef DEV_SC 947 err = sc_probe_unit(device_get_unit(dev), 948 device_get_flags(dev) | SC_AUTODETECT_KBD); 949 if (err != 0) 950 return (err); 951 #endif 952 953 return (BUS_PROBE_DEFAULT); 954 } 955 956 static int 957 am335x_lcd_attach(device_t dev) 958 { 959 struct am335x_lcd_softc *sc; 960 961 int err; 962 int rid; 963 struct sysctl_ctx_list *ctx; 964 struct sysctl_oid *tree; 965 phandle_t root, panel_node; 966 967 err = 0; 968 sc = device_get_softc(dev); 969 sc->sc_dev = dev; 970 971 am335x_read_hdmi_property(dev); 972 973 root = OF_finddevice("/"); 974 if (root == -1) { 975 device_printf(dev, "failed to get FDT root node\n"); 976 return (ENXIO); 977 } 978 979 /* Fixme: Cant find any reference in DTS for dpll_disp_ck@498 for now. */ 980 err = clk_get_by_name(dev, "dpll_disp_ck@498", &sc->sc_clk_dpll_disp_ck); 981 if (err != 0) { 982 device_printf(dev, "Cant get dpll_disp_ck@49\n"); 983 return (ENXIO); 984 } 985 986 sc->sc_panel.ac_bias = 255; 987 sc->sc_panel.ac_bias_intrpt = 0; 988 sc->sc_panel.dma_burst_sz = 16; 989 sc->sc_panel.bpp = 16; 990 sc->sc_panel.fdd = 128; 991 sc->sc_panel.sync_edge = 0; 992 sc->sc_panel.sync_ctrl = 1; 993 994 panel_node = fdt_find_compatible(root, "ti,tilcdc,panel", 1); 995 if (panel_node != 0) { 996 device_printf(dev, "using static panel info\n"); 997 if (am335x_read_panel_info(dev, panel_node, &sc->sc_panel)) { 998 device_printf(dev, "failed to read panel info\n"); 999 return (ENXIO); 1000 } 1001 1002 if (am335x_read_timing(dev, panel_node, &sc->sc_panel)) { 1003 device_printf(dev, "failed to read timings\n"); 1004 return (ENXIO); 1005 } 1006 } 1007 1008 err = ti_sysc_clock_enable(device_get_parent(dev)); 1009 if (err != 0) { 1010 device_printf(dev, "Failed to enable sysc clkctrl, err %d\n", err); 1011 return (ENXIO); 1012 } 1013 1014 rid = 0; 1015 sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 1016 RF_ACTIVE); 1017 if (!sc->sc_mem_res) { 1018 device_printf(dev, "cannot allocate memory window\n"); 1019 return (ENXIO); 1020 } 1021 1022 rid = 0; 1023 sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 1024 RF_ACTIVE); 1025 if (!sc->sc_irq_res) { 1026 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res); 1027 device_printf(dev, "cannot allocate interrupt\n"); 1028 return (ENXIO); 1029 } 1030 1031 if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 1032 NULL, am335x_lcd_intr, sc, 1033 &sc->sc_intr_hl) != 0) { 1034 bus_release_resource(dev, SYS_RES_IRQ, rid, 1035 sc->sc_irq_res); 1036 bus_release_resource(dev, SYS_RES_MEMORY, rid, 1037 sc->sc_mem_res); 1038 device_printf(dev, "Unable to setup the irq handler.\n"); 1039 return (ENXIO); 1040 } 1041 1042 LCD_LOCK_INIT(sc); 1043 1044 /* Init backlight interface */ 1045 ctx = device_get_sysctl_ctx(sc->sc_dev); 1046 tree = device_get_sysctl_tree(sc->sc_dev); 1047 sc->sc_oid = SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO, 1048 "backlight", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 0, 1049 am335x_lcd_sysctl_backlight, "I", "LCD backlight"); 1050 sc->sc_backlight = 0; 1051 /* Check if eCAS interface is available at this point */ 1052 if (am335x_pwm_config_ecap(PWM_UNIT, 1053 PWM_PERIOD, PWM_PERIOD) == 0) 1054 sc->sc_backlight = 100; 1055 1056 if (panel_node != 0) 1057 am335x_lcd_configure(sc); 1058 else 1059 sc->sc_hdmi_evh = EVENTHANDLER_REGISTER(hdmi_event, 1060 am335x_lcd_hdmi_event, sc, EVENTHANDLER_PRI_ANY); 1061 1062 return (0); 1063 } 1064 1065 static int 1066 am335x_lcd_detach(device_t dev) 1067 { 1068 /* Do not let unload driver */ 1069 return (EBUSY); 1070 } 1071 1072 static struct fb_info * 1073 am335x_lcd_fb_getinfo(device_t dev) 1074 { 1075 struct am335x_lcd_softc *sc; 1076 1077 sc = device_get_softc(dev); 1078 1079 return (&sc->sc_fb_info); 1080 } 1081 1082 static device_method_t am335x_lcd_methods[] = { 1083 DEVMETHOD(device_probe, am335x_lcd_probe), 1084 DEVMETHOD(device_attach, am335x_lcd_attach), 1085 DEVMETHOD(device_detach, am335x_lcd_detach), 1086 1087 /* Framebuffer service methods */ 1088 DEVMETHOD(fb_getinfo, am335x_lcd_fb_getinfo), 1089 1090 DEVMETHOD_END 1091 }; 1092 1093 static driver_t am335x_lcd_driver = { 1094 "fb", 1095 am335x_lcd_methods, 1096 sizeof(struct am335x_lcd_softc), 1097 }; 1098 1099 DRIVER_MODULE(am335x_lcd, simplebus, am335x_lcd_driver, 0, 0); 1100 MODULE_VERSION(am335x_lcd, 1); 1101 MODULE_DEPEND(am335x_lcd, simplebus, 1, 1, 1); 1102 MODULE_DEPEND(am335x_lcd, ti_sysc, 1, 1, 1);
Cache object: 13199b18416fd442963b4f871beee761
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