sys/arm/ti/am335x/am335x_lcd.c

   1 /*-
   2  * Copyright 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include "opt_syscons.h"
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/clock.h>
  36 #include <sys/time.h>
  37 #include <sys/bus.h>
  38 #include <sys/lock.h>
  39 #include <sys/mutex.h>
  40 #include <sys/resource.h>
  41 #include <sys/rman.h>
  42 #include <sys/sysctl.h>
  43 #include <vm/vm.h>
  44 #include <vm/pmap.h>
  45 #include <sys/fbio.h>
  46 #include <sys/consio.h>
  47
  48 #include <machine/bus.h>
  49
  50 #include <dev/fdt/fdt_common.h>
  51 #include <dev/ofw/openfirm.h>
  52 #include <dev/ofw/ofw_bus.h>
  53 #include <dev/ofw/ofw_bus_subr.h>
  54
  55 #include <dev/videomode/videomode.h>
  56 #include <dev/videomode/edidvar.h>
  57
  58 #include <dev/fb/fbreg.h>
  59 #ifdef DEV_SC
  60 #include <dev/syscons/syscons.h>
  61 #else /* VT */
  62 #include <dev/vt/vt.h>
  63 #endif
  64
  65 #include <arm/ti/ti_prcm.h>
  66 #include <arm/ti/ti_scm.h>
  67
  68 #include "am335x_lcd.h"
  69 #include "am335x_pwm.h"
  70
  71 #include "fb_if.h"
  72 #include "hdmi_if.h"
  73
  74 #define LCD_PID                 0x00
  75 #define LCD_CTRL                0x04
  76 #define         CTRL_DIV_MASK           0xff
  77 #define         CTRL_DIV_SHIFT          8
  78 #define         CTRL_AUTO_UFLOW_RESTART (1 << 1)
  79 #define         CTRL_RASTER_MODE        1
  80 #define         CTRL_LIDD_MODE          0
  81 #define LCD_LIDD_CTRL           0x0C
  82 #define LCD_LIDD_CS0_CONF       0x10
  83 #define LCD_LIDD_CS0_ADDR       0x14
  84 #define LCD_LIDD_CS0_DATA       0x18
  85 #define LCD_LIDD_CS1_CONF       0x1C
  86 #define LCD_LIDD_CS1_ADDR       0x20
  87 #define LCD_LIDD_CS1_DATA       0x24
  88 #define LCD_RASTER_CTRL         0x28
  89 #define         RASTER_CTRL_TFT24_UNPACKED      (1 << 26)
  90 #define         RASTER_CTRL_TFT24               (1 << 25)
  91 #define         RASTER_CTRL_STN565              (1 << 24)
  92 #define         RASTER_CTRL_TFTPMAP             (1 << 23)
  93 #define         RASTER_CTRL_NIBMODE             (1 << 22)
  94 #define         RASTER_CTRL_PALMODE_SHIFT       20
  95 #define         PALETTE_PALETTE_AND_DATA        0x00
  96 #define         PALETTE_PALETTE_ONLY            0x01
  97 #define         PALETTE_DATA_ONLY               0x02
  98 #define         RASTER_CTRL_REQDLY_SHIFT        12
  99 #define         RASTER_CTRL_MONO8B              (1 << 9)
 100 #define         RASTER_CTRL_RBORDER             (1 << 8)
 101 #define         RASTER_CTRL_LCDTFT              (1 << 7)
 102 #define         RASTER_CTRL_LCDBW               (1 << 1)
 103 #define         RASTER_CTRL_LCDEN               (1 << 0)
 104 #define LCD_RASTER_TIMING_0     0x2C
 105 #define         RASTER_TIMING_0_HBP_SHIFT       24
 106 #define         RASTER_TIMING_0_HFP_SHIFT       16
 107 #define         RASTER_TIMING_0_HSW_SHIFT       10
 108 #define         RASTER_TIMING_0_PPLLSB_SHIFT    4
 109 #define         RASTER_TIMING_0_PPLMSB_SHIFT    3
 110 #define LCD_RASTER_TIMING_1     0x30
 111 #define         RASTER_TIMING_1_VBP_SHIFT       24
 112 #define         RASTER_TIMING_1_VFP_SHIFT       16
 113 #define         RASTER_TIMING_1_VSW_SHIFT       10
 114 #define         RASTER_TIMING_1_LPP_SHIFT       0
 115 #define LCD_RASTER_TIMING_2     0x34
 116 #define         RASTER_TIMING_2_HSWHI_SHIFT     27
 117 #define         RASTER_TIMING_2_LPP_B10_SHIFT   26
 118 #define         RASTER_TIMING_2_PHSVS           (1 << 25)
 119 #define         RASTER_TIMING_2_PHSVS_RISE      (1 << 24)
 120 #define         RASTER_TIMING_2_PHSVS_FALL      (0 << 24)
 121 #define         RASTER_TIMING_2_IOE             (1 << 23)
 122 #define         RASTER_TIMING_2_IPC             (1 << 22)
 123 #define         RASTER_TIMING_2_IHS             (1 << 21)
 124 #define         RASTER_TIMING_2_IVS             (1 << 20)
 125 #define         RASTER_TIMING_2_ACBI_SHIFT      16
 126 #define         RASTER_TIMING_2_ACB_SHIFT       8
 127 #define         RASTER_TIMING_2_HBPHI_SHIFT     4
 128 #define         RASTER_TIMING_2_HFPHI_SHIFT     0
 129 #define LCD_RASTER_SUBPANEL     0x38
 130 #define LCD_RASTER_SUBPANEL2    0x3C
 131 #define LCD_LCDDMA_CTRL         0x40
 132 #define         LCDDMA_CTRL_DMA_MASTER_PRIO_SHIFT               16
 133 #define         LCDDMA_CTRL_TH_FIFO_RDY_SHIFT   8
 134 #define         LCDDMA_CTRL_BURST_SIZE_SHIFT    4
 135 #define         LCDDMA_CTRL_BYTES_SWAP          (1 << 3)
 136 #define         LCDDMA_CTRL_BE                  (1 << 1)
 137 #define         LCDDMA_CTRL_FB0_ONLY            0
 138 #define         LCDDMA_CTRL_FB0_FB1             (1 << 0)
 139 #define LCD_LCDDMA_FB0_BASE     0x44
 140 #define LCD_LCDDMA_FB0_CEILING  0x48
 141 #define LCD_LCDDMA_FB1_BASE     0x4C
 142 #define LCD_LCDDMA_FB1_CEILING  0x50
 143 #define LCD_SYSCONFIG           0x54
 144 #define         SYSCONFIG_STANDBY_FORCE         (0 << 4)
 145 #define         SYSCONFIG_STANDBY_NONE          (1 << 4)
 146 #define         SYSCONFIG_STANDBY_SMART         (2 << 4)
 147 #define         SYSCONFIG_IDLE_FORCE            (0 << 2)
 148 #define         SYSCONFIG_IDLE_NONE             (1 << 2)
 149 #define         SYSCONFIG_IDLE_SMART            (2 << 2)
 150 #define LCD_IRQSTATUS_RAW       0x58
 151 #define LCD_IRQSTATUS           0x5C
 152 #define LCD_IRQENABLE_SET       0x60
 153 #define LCD_IRQENABLE_CLEAR     0x64
 154 #define         IRQ_EOF1                (1 << 9)
 155 #define         IRQ_EOF0                (1 << 8)
 156 #define         IRQ_PL                  (1 << 6)
 157 #define         IRQ_FUF                 (1 << 5)
 158 #define         IRQ_ACB                 (1 << 3)
 159 #define         IRQ_SYNC_LOST           (1 << 2)
 160 #define         IRQ_RASTER_DONE         (1 << 1)
 161 #define         IRQ_FRAME_DONE          (1 << 0)
 162 #define LCD_END_OF_INT_IND      0x68
 163 #define LCD_CLKC_ENABLE         0x6C
 164 #define         CLKC_ENABLE_DMA         (1 << 2)
 165 #define         CLKC_ENABLE_LDID        (1 << 1)
 166 #define         CLKC_ENABLE_CORE        (1 << 0)
 167 #define LCD_CLKC_RESET          0x70
 168 #define         CLKC_RESET_MAIN         (1 << 3)
 169 #define         CLKC_RESET_DMA          (1 << 2)
 170 #define         CLKC_RESET_LDID         (1 << 1)
 171 #define         CLKC_RESET_CORE         (1 << 0)
 172
 173 #define LCD_LOCK(_sc)           mtx_lock(&(_sc)->sc_mtx)
 174 #define LCD_UNLOCK(_sc)         mtx_unlock(&(_sc)->sc_mtx)
 175 #define LCD_LOCK_INIT(_sc)      mtx_init(&(_sc)->sc_mtx, \
 176     device_get_nameunit(_sc->sc_dev), "am335x_lcd", MTX_DEF)
 177 #define LCD_LOCK_DESTROY(_sc)   mtx_destroy(&(_sc)->sc_mtx);
 178
 179 #define LCD_READ4(_sc, reg)     bus_read_4((_sc)->sc_mem_res, reg);
 180 #define LCD_WRITE4(_sc, reg, value)     \
 181     bus_write_4((_sc)->sc_mem_res, reg, value);
 182
 183 /* Backlight is controlled by eCAS interface on PWM unit 0 */
 184 #define PWM_UNIT        0
 185 #define PWM_PERIOD      100
 186
 187 #define MODE_HBP(mode)  ((mode)->htotal - (mode)->hsync_end)
 188 #define MODE_HFP(mode)  ((mode)->hsync_start - (mode)->hdisplay)
 189 #define MODE_HSW(mode)  ((mode)->hsync_end - (mode)->hsync_start)
 190 #define MODE_VBP(mode)  ((mode)->vtotal - (mode)->vsync_end)
 191 #define MODE_VFP(mode)  ((mode)->vsync_start - (mode)->vdisplay)
 192 #define MODE_VSW(mode)  ((mode)->vsync_end - (mode)->vsync_start)
 193
 194 #define MAX_PIXEL_CLOCK 126000
 195 #define MAX_BANDWIDTH   (1280*1024*60)
 196
 197 struct am335x_lcd_softc {
 198         device_t                sc_dev;
 199         struct fb_info          sc_fb_info;
 200         struct resource         *sc_mem_res;
 201         struct resource         *sc_irq_res;
 202         void                    *sc_intr_hl;
 203         struct mtx              sc_mtx;
 204         int                     sc_backlight;
 205         struct sysctl_oid       *sc_oid;
 206
 207         struct panel_info       sc_panel;
 208
 209         /* Framebuffer */
 210         bus_dma_tag_t           sc_dma_tag;
 211         bus_dmamap_t            sc_dma_map;
 212         size_t                  sc_fb_size;
 213         bus_addr_t              sc_fb_phys;
 214         uint8_t                 *sc_fb_base;
 215
 216         /* HDMI framer */
 217         phandle_t               sc_hdmi_framer;
 218         eventhandler_tag        sc_hdmi_evh;
 219 };
 220
 221 static void
 222 am335x_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
 223 {
 224         bus_addr_t *addr;
 225
 226         if (err)
 227                 return;
 228
 229         addr = (bus_addr_t*)arg;
 230         *addr = segs[0].ds_addr;
 231 }
 232
 233 static uint32_t
 234 am335x_lcd_calc_divisor(uint32_t reference, uint32_t freq)
 235 {
 236         uint32_t div, i;
 237         uint32_t delta, min_delta;
 238
 239         min_delta = freq;
 240         div = 255;
 241
 242         /* Raster mode case: divisors are in range from 2 to 255 */
 243         for (i = 2; i < 255; i++) {
 244                 delta = abs(reference/i - freq);
 245                 if (delta < min_delta) {
 246                         div = i;
 247                         min_delta = delta;
 248                 }
 249         }
 250
 251         return (div);
 252 }
 253
 254 static int
 255 am335x_lcd_sysctl_backlight(SYSCTL_HANDLER_ARGS)
 256 {
 257         struct am335x_lcd_softc *sc = (struct am335x_lcd_softc*)arg1;
 258         int error;
 259         int backlight;
 260
 261         backlight = sc->sc_backlight;
 262         error = sysctl_handle_int(oidp, &backlight, 0, req);
 263
 264         if (error != 0 || req->newptr == NULL)
 265                 return (error);
 266
 267         if (backlight < 0)
 268                 backlight = 0;
 269         if (backlight > 100)
 270                 backlight = 100;
 271
 272         LCD_LOCK(sc);
 273         error = am335x_pwm_config_ecap(PWM_UNIT, PWM_PERIOD,
 274             backlight*PWM_PERIOD/100);
 275         if (error == 0)
 276                 sc->sc_backlight = backlight;
 277         LCD_UNLOCK(sc);
 278
 279         return (error);
 280 }
 281
 282 static uint32_t
 283 am335x_mode_vrefresh(const struct videomode *mode)
 284 {
 285         uint32_t refresh;
 286
 287         /* Calculate vertical refresh rate */
 288         refresh = (mode->dot_clock * 1000 / mode->htotal);
 289         refresh = (refresh + mode->vtotal / 2) / mode->vtotal;
 290
 291         if (mode->flags & VID_INTERLACE)
 292                 refresh *= 2;
 293         if (mode->flags & VID_DBLSCAN)
 294                 refresh /= 2;
 295
 296         return refresh;
 297 }
 298
 299 static int
 300 am335x_mode_is_valid(const struct videomode *mode)
 301 {
 302         uint32_t hbp, hfp, hsw;
 303         uint32_t vbp, vfp, vsw;
 304
 305         if (mode->dot_clock > MAX_PIXEL_CLOCK)
 306                 return (0);
 307
 308         if (mode->hdisplay & 0xf)
 309                 return (0);
 310
 311         if (mode->vdisplay > 2048)
 312                 return (0);
 313
 314         /* Check ranges for timing parameters */
 315         hbp = MODE_HBP(mode) - 1;
 316         hfp = MODE_HFP(mode) - 1;
 317         hsw = MODE_HSW(mode) - 1;
 318         vbp = MODE_VBP(mode);
 319         vfp = MODE_VFP(mode);
 320         vsw = MODE_VSW(mode) - 1;
 321
 322         if (hbp > 0x3ff)
 323                 return (0);
 324         if (hfp > 0x3ff)
 325                 return (0);
 326         if (hsw > 0x3ff)
 327                 return (0);
 328
 329         if (vbp > 0xff)
 330                 return (0);
 331         if (vfp > 0xff)
 332                 return (0);
 333         if (vsw > 0x3f)
 334                 return (0);
 335         if (mode->vdisplay*mode->hdisplay*am335x_mode_vrefresh(mode)
 336             > MAX_BANDWIDTH)
 337                 return (0);
 338
 339         return (1);
 340 }
 341
 342 static void
 343 am335x_read_hdmi_property(device_t dev)
 344 {
 345         phandle_t node, xref;
 346         phandle_t endpoint;
 347         phandle_t hdmi_xref;
 348         struct am335x_lcd_softc *sc;
 349
 350         sc = device_get_softc(dev);
 351         node = ofw_bus_get_node(dev);
 352         sc->sc_hdmi_framer = 0;
 353
 354         /*
 355          * Old FreeBSD way of referencing to HDMI framer
 356          */
 357         if (OF_getencprop(node, "hdmi", &hdmi_xref, sizeof(hdmi_xref)) != -1) {
 358                 sc->sc_hdmi_framer = hdmi_xref;
 359                 return;
 360         }
 361
 362         /*
 363          * Use bindings described in Linux docs:
 364          * bindings/media/video-interfaces.txt
 365          * We assume that the only endpoint in LCDC node
 366          * is HDMI framer.
 367          */
 368         node = ofw_bus_find_child(node, "port");
 369
 370         /* No media bindings */
 371         if (node == 0)
 372                 return;
 373
 374         for (endpoint = OF_child(node); endpoint != 0; endpoint = OF_peer(endpoint)) {
 375                 if (OF_getencprop(endpoint, "remote-endpoint", &xref, sizeof(xref)) != -1) {
 376                         /* port/port@0/endpoint@0 */
 377                         node = OF_node_from_xref(xref);
 378                         /* port/port@0 */
 379                         node = OF_parent(node);
 380                         /* port */
 381                         node = OF_parent(node);
 382                         /* actual owner of port, in our case HDMI framer */
 383                         sc->sc_hdmi_framer = OF_xref_from_node(OF_parent(node));
 384                         if (sc->sc_hdmi_framer != 0)
 385                                 return;
 386                 }
 387         }
 388 }
 389
 390 static int
 391 am335x_read_property(device_t dev, phandle_t node, const char *name, uint32_t *val)
 392 {
 393         pcell_t cell;
 394
 395         if ((OF_getencprop(node, name, &cell, sizeof(cell))) <= 0) {
 396                 device_printf(dev, "missing '%s' attribute in LCD panel info\n",
 397                     name);
 398                 return (ENXIO);
 399         }
 400
 401         *val = cell;
 402
 403         return (0);
 404 }
 405
 406 static int
 407 am335x_read_timing(device_t dev, phandle_t node, struct panel_info *panel)
 408 {
 409         int error;
 410         phandle_t timings_node, timing_node, native;
 411
 412         timings_node = ofw_bus_find_child(node, "display-timings");
 413         if (timings_node == 0) {
 414                 device_printf(dev, "no \"display-timings\" node\n");
 415                 return (-1);
 416         }
 417
 418         if (OF_searchencprop(timings_node, "native-mode", &native,
 419             sizeof(native)) == -1) {
 420                 device_printf(dev, "no \"native-mode\" reference in \"timings\" node\n");
 421                 return (-1);
 422         }
 423
 424         timing_node = OF_node_from_xref(native);
 425
 426         error = 0;
 427         if ((error = am335x_read_property(dev, timing_node,
 428             "hactive", &panel->panel_width)))
 429                 goto out;
 430
 431         if ((error = am335x_read_property(dev, timing_node,
 432             "vactive", &panel->panel_height)))
 433                 goto out;
 434
 435         if ((error = am335x_read_property(dev, timing_node,
 436             "hfront-porch", &panel->panel_hfp)))
 437                 goto out;
 438
 439         if ((error = am335x_read_property(dev, timing_node,
 440             "hback-porch", &panel->panel_hbp)))
 441                 goto out;
 442
 443         if ((error = am335x_read_property(dev, timing_node,
 444             "hsync-len", &panel->panel_hsw)))
 445                 goto out;
 446
 447         if ((error = am335x_read_property(dev, timing_node,
 448             "vfront-porch", &panel->panel_vfp)))
 449                 goto out;
 450
 451         if ((error = am335x_read_property(dev, timing_node,
 452             "vback-porch", &panel->panel_vbp)))
 453                 goto out;
 454
 455         if ((error = am335x_read_property(dev, timing_node,
 456             "vsync-len", &panel->panel_vsw)))
 457                 goto out;
 458
 459         if ((error = am335x_read_property(dev, timing_node,
 460             "clock-frequency", &panel->panel_pxl_clk)))
 461                 goto out;
 462
 463         if ((error = am335x_read_property(dev, timing_node,
 464             "pixelclk-active", &panel->pixelclk_active)))
 465                 goto out;
 466
 467         if ((error = am335x_read_property(dev, timing_node,
 468             "hsync-active", &panel->hsync_active)))
 469                 goto out;
 470
 471         if ((error = am335x_read_property(dev, timing_node,
 472             "vsync-active", &panel->vsync_active)))
 473                 goto out;
 474
 475 out:
 476         return (error);
 477 }
 478
 479 static int
 480 am335x_read_panel_info(device_t dev, phandle_t node, struct panel_info *panel)
 481 {
 482         phandle_t panel_info_node;
 483
 484         panel_info_node = ofw_bus_find_child(node, "panel-info");
 485         if (panel_info_node == 0)
 486                 return (-1);
 487
 488         am335x_read_property(dev, panel_info_node,
 489             "ac-bias", &panel->ac_bias);
 490
 491         am335x_read_property(dev, panel_info_node,
 492             "ac-bias-intrpt", &panel->ac_bias_intrpt);
 493
 494         am335x_read_property(dev, panel_info_node,
 495             "dma-burst-sz", &panel->dma_burst_sz);
 496
 497         am335x_read_property(dev, panel_info_node,
 498             "bpp", &panel->bpp);
 499
 500         am335x_read_property(dev, panel_info_node,
 501             "fdd", &panel->fdd);
 502
 503         am335x_read_property(dev, panel_info_node,
 504             "sync-edge", &panel->sync_edge);
 505
 506         am335x_read_property(dev, panel_info_node,
 507             "sync-ctrl", &panel->sync_ctrl);
 508
 509         return (0);
 510 }
 511
 512 static void
 513 am335x_lcd_intr(void *arg)
 514 {
 515         struct am335x_lcd_softc *sc = arg;
 516         uint32_t reg;
 517
 518         reg = LCD_READ4(sc, LCD_IRQSTATUS);
 519         LCD_WRITE4(sc, LCD_IRQSTATUS, reg);
 520         /* Read value back to make sure it reached the hardware */
 521         reg = LCD_READ4(sc, LCD_IRQSTATUS);
 522
 523         if (reg & IRQ_SYNC_LOST) {
 524                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 525                 reg &= ~RASTER_CTRL_LCDEN;
 526                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 527
 528                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 529                 reg |= RASTER_CTRL_LCDEN;
 530                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 531                 goto done;
 532         }
 533
 534         if (reg & IRQ_PL) {
 535                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 536                 reg &= ~RASTER_CTRL_LCDEN;
 537                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 538
 539                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 540                 reg |= RASTER_CTRL_LCDEN;
 541                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 542                 goto done;
 543         }
 544
 545         if (reg & IRQ_EOF0) {
 546                 LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys);
 547                 LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 548                 reg &= ~IRQ_EOF0;
 549         }
 550
 551         if (reg & IRQ_EOF1) {
 552                 LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys);
 553                 LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 554                 reg &= ~IRQ_EOF1;
 555         }
 556
 557         if (reg & IRQ_FUF) {
 558                 /* TODO: Handle FUF */
 559         }
 560
 561         if (reg & IRQ_ACB) {
 562                 /* TODO: Handle ACB */
 563         }
 564
 565 done:
 566         LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
 567         /* Read value back to make sure it reached the hardware */
 568         reg = LCD_READ4(sc, LCD_END_OF_INT_IND);
 569 }
 570
 571 static const struct videomode *
 572 am335x_lcd_pick_mode(struct edid_info *ei)
 573 {
 574         const struct videomode *videomode;
 575         const struct videomode *m;
 576         int n;
 577
 578         /* Get standard VGA as default */
 579         videomode = NULL;
 580
 581         /*
 582          * Pick a mode.
 583          */
 584         if (ei->edid_preferred_mode != NULL) {
 585                 if (am335x_mode_is_valid(ei->edid_preferred_mode))
 586                         videomode = ei->edid_preferred_mode;
 587         }
 588
 589         if (videomode == NULL) {
 590                 m = ei->edid_modes;
 591
 592                 sort_modes(ei->edid_modes,
 593                     &ei->edid_preferred_mode,
 594                     ei->edid_nmodes);
 595                 for (n = 0; n < ei->edid_nmodes; n++)
 596                         if (am335x_mode_is_valid(&m[n])) {
 597                                 videomode = &m[n];
 598                                 break;
 599                         }
 600         }
 601
 602         return videomode;
 603 }
 604
 605 static int
 606 am335x_lcd_configure(struct am335x_lcd_softc *sc)
 607 {
 608         int div;
 609         uint32_t reg, timing0, timing1, timing2;
 610         uint32_t burst_log;
 611         size_t dma_size;
 612         uint32_t hbp, hfp, hsw;
 613         uint32_t vbp, vfp, vsw;
 614         uint32_t width, height;
 615         unsigned int ref_freq;
 616         int err;
 617
 618         /*
 619          * try to adjust clock to get double of requested frequency
 620          * HDMI/DVI displays are very sensitive to error in frequncy value
 621          */
 622         if (ti_prcm_clk_set_source_freq(LCDC_CLK, sc->sc_panel.panel_pxl_clk*2)) {
 623                 device_printf(sc->sc_dev, "can't set source frequency\n");
 624                 return (ENXIO);
 625         }
 626
 627         if (ti_prcm_clk_get_source_freq(LCDC_CLK, &ref_freq)) {
 628                 device_printf(sc->sc_dev, "can't get reference frequency\n");
 629                 return (ENXIO);
 630         }
 631
 632         /* Panle initialization */
 633         dma_size = round_page(sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8);
 634
 635         /*
 636          * Now allocate framebuffer memory
 637          */
 638         err = bus_dma_tag_create(
 639             bus_get_dma_tag(sc->sc_dev),
 640             4, 0,               /* alignment, boundary */
 641             BUS_SPACE_MAXADDR_32BIT,    /* lowaddr */
 642             BUS_SPACE_MAXADDR,          /* highaddr */
 643             NULL, NULL,                 /* filter, filterarg */
 644             dma_size, 1,                        /* maxsize, nsegments */
 645             dma_size, 0,                        /* maxsegsize, flags */
 646             NULL, NULL,                 /* lockfunc, lockarg */
 647             &sc->sc_dma_tag);
 648         if (err)
 649                 goto done;
 650
 651         err = bus_dmamem_alloc(sc->sc_dma_tag, (void **)&sc->sc_fb_base,
 652             BUS_DMA_COHERENT, &sc->sc_dma_map);
 653
 654         if (err) {
 655                 device_printf(sc->sc_dev, "cannot allocate framebuffer\n");
 656                 goto done;
 657         }
 658
 659         err = bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, sc->sc_fb_base,
 660             dma_size, am335x_fb_dmamap_cb, &sc->sc_fb_phys, BUS_DMA_NOWAIT);
 661
 662         if (err) {
 663                 device_printf(sc->sc_dev, "cannot load DMA map\n");
 664                 goto done;
 665         }
 666
 667         /* Make sure it's blank */
 668         memset(sc->sc_fb_base, 0x0, dma_size);
 669
 670         /* Calculate actual FB Size */
 671         sc->sc_fb_size = sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8;
 672
 673         /* Only raster mode is supported */
 674         reg = CTRL_RASTER_MODE;
 675         div = am335x_lcd_calc_divisor(ref_freq, sc->sc_panel.panel_pxl_clk);
 676         reg |= (div << CTRL_DIV_SHIFT);
 677         LCD_WRITE4(sc, LCD_CTRL, reg);
 678
 679         /* Set timing */
 680         timing0 = timing1 = timing2 = 0;
 681
 682         hbp = sc->sc_panel.panel_hbp - 1;
 683         hfp = sc->sc_panel.panel_hfp - 1;
 684         hsw = sc->sc_panel.panel_hsw - 1;
 685
 686         vbp = sc->sc_panel.panel_vbp;
 687         vfp = sc->sc_panel.panel_vfp;
 688         vsw = sc->sc_panel.panel_vsw - 1;
 689
 690         height = sc->sc_panel.panel_height - 1;
 691         width = sc->sc_panel.panel_width - 1;
 692
 693         /* Horizontal back porch */
 694         timing0 |= (hbp & 0xff) << RASTER_TIMING_0_HBP_SHIFT;
 695         timing2 |= ((hbp >> 8) & 3) << RASTER_TIMING_2_HBPHI_SHIFT;
 696         /* Horizontal front porch */
 697         timing0 |= (hfp & 0xff) << RASTER_TIMING_0_HFP_SHIFT;
 698         timing2 |= ((hfp >> 8) & 3) << RASTER_TIMING_2_HFPHI_SHIFT;
 699         /* Horizontal sync width */
 700         timing0 |= (hsw & 0x3f) << RASTER_TIMING_0_HSW_SHIFT;
 701         timing2 |= ((hsw >> 6) & 0xf) << RASTER_TIMING_2_HSWHI_SHIFT;
 702
 703         /* Vertical back porch, front porch, sync width */
 704         timing1 |= (vbp & 0xff) << RASTER_TIMING_1_VBP_SHIFT;
 705         timing1 |= (vfp & 0xff) << RASTER_TIMING_1_VFP_SHIFT;
 706         timing1 |= (vsw & 0x3f) << RASTER_TIMING_1_VSW_SHIFT;
 707
 708         /* Pixels per line */
 709         timing0 |= ((width >> 10) & 1)
 710             << RASTER_TIMING_0_PPLMSB_SHIFT;
 711         timing0 |= ((width >> 4) & 0x3f)
 712             << RASTER_TIMING_0_PPLLSB_SHIFT;
 713
 714         /* Lines per panel */
 715         timing1 |= (height & 0x3ff)
 716             << RASTER_TIMING_1_LPP_SHIFT;
 717         timing2 |= ((height >> 10 ) & 1)
 718             << RASTER_TIMING_2_LPP_B10_SHIFT;
 719
 720         /* clock signal settings */
 721         if (sc->sc_panel.sync_ctrl)
 722                 timing2 |= RASTER_TIMING_2_PHSVS;
 723         if (sc->sc_panel.sync_edge)
 724                 timing2 |= RASTER_TIMING_2_PHSVS_RISE;
 725         else
 726                 timing2 |= RASTER_TIMING_2_PHSVS_FALL;
 727         if (sc->sc_panel.hsync_active == 0)
 728                 timing2 |= RASTER_TIMING_2_IHS;
 729         if (sc->sc_panel.vsync_active == 0)
 730                 timing2 |= RASTER_TIMING_2_IVS;
 731         if (sc->sc_panel.pixelclk_active == 0)
 732                 timing2 |= RASTER_TIMING_2_IPC;
 733
 734         /* AC bias */
 735         timing2 |= (sc->sc_panel.ac_bias << RASTER_TIMING_2_ACB_SHIFT);
 736         timing2 |= (sc->sc_panel.ac_bias_intrpt << RASTER_TIMING_2_ACBI_SHIFT);
 737
 738         LCD_WRITE4(sc, LCD_RASTER_TIMING_0, timing0);
 739         LCD_WRITE4(sc, LCD_RASTER_TIMING_1, timing1);
 740         LCD_WRITE4(sc, LCD_RASTER_TIMING_2, timing2);
 741
 742         /* DMA settings */
 743         reg = LCDDMA_CTRL_FB0_FB1;
 744         /* Find power of 2 for current burst size */
 745         switch (sc->sc_panel.dma_burst_sz) {
 746         case 1:
 747                 burst_log = 0;
 748                 break;
 749         case 2:
 750                 burst_log = 1;
 751                 break;
 752         case 4:
 753                 burst_log = 2;
 754                 break;
 755         case 8:
 756                 burst_log = 3;
 757                 break;
 758         case 16:
 759         default:
 760                 burst_log = 4;
 761                 break;
 762         }
 763         reg |= (burst_log << LCDDMA_CTRL_BURST_SIZE_SHIFT);
 764         /* XXX: FIFO TH */
 765         reg |= (0 << LCDDMA_CTRL_TH_FIFO_RDY_SHIFT);
 766         LCD_WRITE4(sc, LCD_LCDDMA_CTRL, reg);
 767
 768         LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys);
 769         LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 770         LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys);
 771         LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 772
 773         /* Enable LCD */
 774         reg = RASTER_CTRL_LCDTFT;
 775         reg |= (sc->sc_panel.fdd << RASTER_CTRL_REQDLY_SHIFT);
 776         reg |= (PALETTE_DATA_ONLY << RASTER_CTRL_PALMODE_SHIFT);
 777         if (sc->sc_panel.bpp >= 24)
 778                 reg |= RASTER_CTRL_TFT24;
 779         if (sc->sc_panel.bpp == 32)
 780                 reg |= RASTER_CTRL_TFT24_UNPACKED;
 781         LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 782
 783         LCD_WRITE4(sc, LCD_CLKC_ENABLE,
 784             CLKC_ENABLE_DMA | CLKC_ENABLE_LDID | CLKC_ENABLE_CORE);
 785
 786         LCD_WRITE4(sc, LCD_CLKC_RESET, CLKC_RESET_MAIN);
 787         DELAY(100);
 788         LCD_WRITE4(sc, LCD_CLKC_RESET, 0);
 789
 790         reg = IRQ_EOF1 | IRQ_EOF0 | IRQ_FUF | IRQ_PL |
 791             IRQ_ACB | IRQ_SYNC_LOST |  IRQ_RASTER_DONE |
 792             IRQ_FRAME_DONE;
 793         LCD_WRITE4(sc, LCD_IRQENABLE_SET, reg);
 794
 795         reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 796         reg |= RASTER_CTRL_LCDEN;
 797         LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 798
 799         LCD_WRITE4(sc, LCD_SYSCONFIG,
 800             SYSCONFIG_STANDBY_SMART | SYSCONFIG_IDLE_SMART);
 801
 802         sc->sc_fb_info.fb_name = device_get_nameunit(sc->sc_dev);
 803         sc->sc_fb_info.fb_vbase = (intptr_t)sc->sc_fb_base;
 804         sc->sc_fb_info.fb_pbase = sc->sc_fb_phys;
 805         sc->sc_fb_info.fb_size = sc->sc_fb_size;
 806         sc->sc_fb_info.fb_bpp = sc->sc_fb_info.fb_depth = sc->sc_panel.bpp;
 807         sc->sc_fb_info.fb_stride = sc->sc_panel.panel_width*sc->sc_panel.bpp / 8;
 808         sc->sc_fb_info.fb_width = sc->sc_panel.panel_width;
 809         sc->sc_fb_info.fb_height = sc->sc_panel.panel_height;
 810
 811 #ifdef  DEV_SC
 812         err = (sc_attach_unit(device_get_unit(sc->sc_dev),
 813             device_get_flags(sc->sc_dev) | SC_AUTODETECT_KBD));
 814
 815         if (err) {
 816                 device_printf(sc->sc_dev, "failed to attach syscons\n");
 817                 goto fail;
 818         }
 819
 820         am335x_lcd_syscons_setup((vm_offset_t)sc->sc_fb_base, sc->sc_fb_phys, &panel);
 821 #else /* VT */
 822         device_t fbd = device_add_child(sc->sc_dev, "fbd",
 823         device_get_unit(sc->sc_dev));
 824         if (fbd != NULL) {
 825                 if (device_probe_and_attach(fbd) != 0)
 826                         device_printf(sc->sc_dev, "failed to attach fbd device\n");
 827         } else
 828                 device_printf(sc->sc_dev, "failed to add fbd child\n");
 829 #endif
 830
 831 done:
 832         return (err);
 833 }
 834
 835 static void
 836 am335x_lcd_hdmi_event(void *arg, device_t hdmi, int event)
 837 {
 838         struct am335x_lcd_softc *sc;
 839         const struct videomode *videomode;
 840         struct videomode hdmi_mode;
 841         device_t hdmi_dev;
 842         uint8_t *edid;
 843         uint32_t edid_len;
 844         struct edid_info ei;
 845
 846         sc = arg;
 847
 848         /* Nothing to work with */
 849         if (!sc->sc_hdmi_framer) {
 850                 device_printf(sc->sc_dev, "HDMI event without HDMI framer set\n");
 851                 return;
 852         }
 853
 854         hdmi_dev = OF_device_from_xref(sc->sc_hdmi_framer);
 855         if (!hdmi_dev) {
 856                 device_printf(sc->sc_dev, "no actual device for \"hdmi\" property\n");
 857                 return;
 858         }
 859
 860         edid = NULL;
 861         edid_len = 0;
 862         if (HDMI_GET_EDID(hdmi_dev, &edid, &edid_len) != 0) {
 863                 device_printf(sc->sc_dev, "failed to get EDID info from HDMI framer\n");
 864                 return;
 865         }
 866
 867         videomode = NULL;
 868
 869         if (edid_parse(edid, &ei) == 0) {
 870                 edid_print(&ei);
 871                 videomode = am335x_lcd_pick_mode(&ei);
 872         } else
 873                 device_printf(sc->sc_dev, "failed to parse EDID\n");
 874
 875         /* Use standard VGA as fallback */
 876         if (videomode == NULL)
 877                 videomode = pick_mode_by_ref(640, 480, 60);
 878
 879         if (videomode == NULL) {
 880                 device_printf(sc->sc_dev, "failed to find usable videomode");
 881                 return;
 882         }
 883
 884         device_printf(sc->sc_dev, "detected videomode: %dx%d @ %dKHz\n", videomode->hdisplay,
 885                 videomode->vdisplay, am335x_mode_vrefresh(videomode));
 886
 887         sc->sc_panel.panel_width = videomode->hdisplay;
 888         sc->sc_panel.panel_height = videomode->vdisplay;
 889         sc->sc_panel.panel_hfp = videomode->hsync_start - videomode->hdisplay;
 890         sc->sc_panel.panel_hbp = videomode->htotal - videomode->hsync_end;
 891         sc->sc_panel.panel_hsw = videomode->hsync_end - videomode->hsync_start;
 892         sc->sc_panel.panel_vfp = videomode->vsync_start - videomode->vdisplay;
 893         sc->sc_panel.panel_vbp = videomode->vtotal - videomode->vsync_end;
 894         sc->sc_panel.panel_vsw = videomode->vsync_end - videomode->vsync_start;
 895         sc->sc_panel.pixelclk_active = 1;
 896
 897         /* logic for HSYNC should be reversed */
 898         if (videomode->flags & VID_NHSYNC)
 899                 sc->sc_panel.hsync_active = 1;
 900         else
 901                 sc->sc_panel.hsync_active = 0;
 902
 903         if (videomode->flags & VID_NVSYNC)
 904                 sc->sc_panel.vsync_active = 0;
 905         else
 906                 sc->sc_panel.vsync_active = 1;
 907
 908         sc->sc_panel.panel_pxl_clk = videomode->dot_clock * 1000;
 909
 910         am335x_lcd_configure(sc);
 911
 912         memcpy(&hdmi_mode, videomode, sizeof(hdmi_mode));
 913         hdmi_mode.hskew = videomode->hsync_end - videomode->hsync_start;
 914         hdmi_mode.flags |= VID_HSKEW;
 915
 916         HDMI_SET_VIDEOMODE(hdmi_dev, &hdmi_mode);
 917 }
 918
 919 static int
 920 am335x_lcd_probe(device_t dev)
 921 {
 922 #ifdef DEV_SC
 923         int err;
 924 #endif
 925
 926         if (!ofw_bus_status_okay(dev))
 927                 return (ENXIO);
 928
 929         if (!ofw_bus_is_compatible(dev, "ti,am33xx-tilcdc"))
 930                 return (ENXIO);
 931
 932         device_set_desc(dev, "AM335x LCD controller");
 933
 934 #ifdef DEV_SC
 935         err = sc_probe_unit(device_get_unit(dev),
 936             device_get_flags(dev) | SC_AUTODETECT_KBD);
 937         if (err != 0)
 938                 return (err);
 939 #endif
 940
 941         return (BUS_PROBE_DEFAULT);
 942 }
 943
 944 static int
 945 am335x_lcd_attach(device_t dev)
 946 {
 947         struct am335x_lcd_softc *sc;
 948
 949         int err;
 950         int rid;
 951         struct sysctl_ctx_list *ctx;
 952         struct sysctl_oid *tree;
 953         phandle_t root, panel_node;
 954
 955         err = 0;
 956         sc = device_get_softc(dev);
 957         sc->sc_dev = dev;
 958
 959         am335x_read_hdmi_property(dev);
 960
 961         root = OF_finddevice("/");
 962         if (root == 0) {
 963                 device_printf(dev, "failed to get FDT root node\n");
 964                 return (ENXIO);
 965         }
 966
 967         sc->sc_panel.ac_bias = 255;
 968         sc->sc_panel.ac_bias_intrpt = 0;
 969         sc->sc_panel.dma_burst_sz = 16;
 970         sc->sc_panel.bpp = 16;
 971         sc->sc_panel.fdd = 128;
 972         sc->sc_panel.sync_edge = 0;
 973         sc->sc_panel.sync_ctrl = 1;
 974
 975         panel_node = fdt_find_compatible(root, "ti,tilcdc,panel", 1);
 976         if (panel_node != 0) {
 977                 device_printf(dev, "using static panel info\n");
 978                 if (am335x_read_panel_info(dev, panel_node, &sc->sc_panel)) {
 979                         device_printf(dev, "failed to read panel info\n");
 980                         return (ENXIO);
 981                 }
 982
 983                 if (am335x_read_timing(dev, panel_node, &sc->sc_panel)) {
 984                         device_printf(dev, "failed to read timings\n");
 985                         return (ENXIO);
 986                 }
 987         }
 988
 989         ti_prcm_clk_enable(LCDC_CLK);
 990
 991         rid = 0;
 992         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
 993             RF_ACTIVE);
 994         if (!sc->sc_mem_res) {
 995                 device_printf(dev, "cannot allocate memory window\n");
 996                 return (ENXIO);
 997         }
 998
 999         rid = 0;
1000         sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
1001             RF_ACTIVE);
1002         if (!sc->sc_irq_res) {
1003                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
1004                 device_printf(dev, "cannot allocate interrupt\n");
1005                 return (ENXIO);
1006         }
1007
1008         if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
1009                         NULL, am335x_lcd_intr, sc,
1010                         &sc->sc_intr_hl) != 0) {
1011                 bus_release_resource(dev, SYS_RES_IRQ, rid,
1012                     sc->sc_irq_res);
1013                 bus_release_resource(dev, SYS_RES_MEMORY, rid,
1014                     sc->sc_mem_res);
1015                 device_printf(dev, "Unable to setup the irq handler.\n");
1016                 return (ENXIO);
1017         }
1018
1019         LCD_LOCK_INIT(sc);
1020
1021         /* Init backlight interface */
1022         ctx = device_get_sysctl_ctx(sc->sc_dev);
1023         tree = device_get_sysctl_tree(sc->sc_dev);
1024         sc->sc_oid = SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
1025             "backlight", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
1026             am335x_lcd_sysctl_backlight, "I", "LCD backlight");
1027         sc->sc_backlight = 0;
1028         /* Check if eCAS interface is available at this point */
1029         if (am335x_pwm_config_ecap(PWM_UNIT,
1030             PWM_PERIOD, PWM_PERIOD) == 0)
1031                 sc->sc_backlight = 100;
1032
1033         if (panel_node != 0)
1034                 am335x_lcd_configure(sc);
1035         else
1036                 sc->sc_hdmi_evh = EVENTHANDLER_REGISTER(hdmi_event,
1037                     am335x_lcd_hdmi_event, sc, EVENTHANDLER_PRI_ANY);
1038
1039         return (0);
1040 }
1041
1042 static int
1043 am335x_lcd_detach(device_t dev)
1044 {
1045         /* Do not let unload driver */
1046         return (EBUSY);
1047 }
1048
1049 static struct fb_info *
1050 am335x_lcd_fb_getinfo(device_t dev)
1051 {
1052         struct am335x_lcd_softc *sc;
1053
1054         sc = device_get_softc(dev);
1055
1056         return (&sc->sc_fb_info);
1057 }
1058
1059 static device_method_t am335x_lcd_methods[] = {
1060         DEVMETHOD(device_probe,         am335x_lcd_probe),
1061         DEVMETHOD(device_attach,        am335x_lcd_attach),
1062         DEVMETHOD(device_detach,        am335x_lcd_detach),
1063
1064         /* Framebuffer service methods */
1065         DEVMETHOD(fb_getinfo,           am335x_lcd_fb_getinfo),
1066
1067         DEVMETHOD_END
1068 };
1069
1070 static driver_t am335x_lcd_driver = {
1071         "fb",
1072         am335x_lcd_methods,
1073         sizeof(struct am335x_lcd_softc),
1074 };
1075
1076 static devclass_t am335x_lcd_devclass;
1077
1078 DRIVER_MODULE(am335x_lcd, simplebus, am335x_lcd_driver, am335x_lcd_devclass, 0, 0);
1079 MODULE_VERSION(am335x_lcd, 1);
1080 MODULE_DEPEND(am335x_lcd, simplebus, 1, 1, 1);