sys/arm/ti/am335x/am335x_lcd.c

   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/time.h>
  39 #include <sys/bus.h>
  40 #include <sys/lock.h>
  41 #include <sys/mutex.h>
  42 #include <sys/resource.h>
  43 #include <sys/rman.h>
  44 #include <sys/sysctl.h>
  45 #include <vm/vm.h>
  46 #include <vm/pmap.h>
  47 #include <sys/fbio.h>
  48 #include <sys/consio.h>
  49
  50 #include <machine/bus.h>
  51
  52 #include <dev/fdt/fdt_common.h>
  53 #include <dev/ofw/openfirm.h>
  54 #include <dev/ofw/ofw_bus.h>
  55 #include <dev/ofw/ofw_bus_subr.h>
  56
  57 #include <dev/videomode/videomode.h>
  58 #include <dev/videomode/edidvar.h>
  59
  60 #include <dev/fb/fbreg.h>
  61 #ifdef DEV_SC
  62 #include <dev/syscons/syscons.h>
  63 #else /* VT */
  64 #include <dev/vt/vt.h>
  65 #endif
  66
  67 #include <arm/ti/ti_prcm.h>
  68 #include <arm/ti/ti_scm.h>
  69
  70 #include "am335x_lcd.h"
  71 #include "am335x_pwm.h"
  72
  73 #include "fb_if.h"
  74 #include "hdmi_if.h"
  75
  76 #define LCD_PID                 0x00
  77 #define LCD_CTRL                0x04
  78 #define         CTRL_DIV_MASK           0xff
  79 #define         CTRL_DIV_SHIFT          8
  80 #define         CTRL_AUTO_UFLOW_RESTART (1 << 1)
  81 #define         CTRL_RASTER_MODE        1
  82 #define         CTRL_LIDD_MODE          0
  83 #define LCD_LIDD_CTRL           0x0C
  84 #define LCD_LIDD_CS0_CONF       0x10
  85 #define LCD_LIDD_CS0_ADDR       0x14
  86 #define LCD_LIDD_CS0_DATA       0x18
  87 #define LCD_LIDD_CS1_CONF       0x1C
  88 #define LCD_LIDD_CS1_ADDR       0x20
  89 #define LCD_LIDD_CS1_DATA       0x24
  90 #define LCD_RASTER_CTRL         0x28
  91 #define         RASTER_CTRL_TFT24_UNPACKED      (1 << 26)
  92 #define         RASTER_CTRL_TFT24               (1 << 25)
  93 #define         RASTER_CTRL_STN565              (1 << 24)
  94 #define         RASTER_CTRL_TFTPMAP             (1 << 23)
  95 #define         RASTER_CTRL_NIBMODE             (1 << 22)
  96 #define         RASTER_CTRL_PALMODE_SHIFT       20
  97 #define         PALETTE_PALETTE_AND_DATA        0x00
  98 #define         PALETTE_PALETTE_ONLY            0x01
  99 #define         PALETTE_DATA_ONLY               0x02
 100 #define         RASTER_CTRL_REQDLY_SHIFT        12
 101 #define         RASTER_CTRL_MONO8B              (1 << 9)
 102 #define         RASTER_CTRL_RBORDER             (1 << 8)
 103 #define         RASTER_CTRL_LCDTFT              (1 << 7)
 104 #define         RASTER_CTRL_LCDBW               (1 << 1)
 105 #define         RASTER_CTRL_LCDEN               (1 << 0)
 106 #define LCD_RASTER_TIMING_0     0x2C
 107 #define         RASTER_TIMING_0_HBP_SHIFT       24
 108 #define         RASTER_TIMING_0_HFP_SHIFT       16
 109 #define         RASTER_TIMING_0_HSW_SHIFT       10
 110 #define         RASTER_TIMING_0_PPLLSB_SHIFT    4
 111 #define         RASTER_TIMING_0_PPLMSB_SHIFT    3
 112 #define LCD_RASTER_TIMING_1     0x30
 113 #define         RASTER_TIMING_1_VBP_SHIFT       24
 114 #define         RASTER_TIMING_1_VFP_SHIFT       16
 115 #define         RASTER_TIMING_1_VSW_SHIFT       10
 116 #define         RASTER_TIMING_1_LPP_SHIFT       0
 117 #define LCD_RASTER_TIMING_2     0x34
 118 #define         RASTER_TIMING_2_HSWHI_SHIFT     27
 119 #define         RASTER_TIMING_2_LPP_B10_SHIFT   26
 120 #define         RASTER_TIMING_2_PHSVS           (1 << 25)
 121 #define         RASTER_TIMING_2_PHSVS_RISE      (1 << 24)
 122 #define         RASTER_TIMING_2_PHSVS_FALL      (0 << 24)
 123 #define         RASTER_TIMING_2_IOE             (1 << 23)
 124 #define         RASTER_TIMING_2_IPC             (1 << 22)
 125 #define         RASTER_TIMING_2_IHS             (1 << 21)
 126 #define         RASTER_TIMING_2_IVS             (1 << 20)
 127 #define         RASTER_TIMING_2_ACBI_SHIFT      16
 128 #define         RASTER_TIMING_2_ACB_SHIFT       8
 129 #define         RASTER_TIMING_2_HBPHI_SHIFT     4
 130 #define         RASTER_TIMING_2_HFPHI_SHIFT     0
 131 #define LCD_RASTER_SUBPANEL     0x38
 132 #define LCD_RASTER_SUBPANEL2    0x3C
 133 #define LCD_LCDDMA_CTRL         0x40
 134 #define         LCDDMA_CTRL_DMA_MASTER_PRIO_SHIFT               16
 135 #define         LCDDMA_CTRL_TH_FIFO_RDY_SHIFT   8
 136 #define         LCDDMA_CTRL_BURST_SIZE_SHIFT    4
 137 #define         LCDDMA_CTRL_BYTES_SWAP          (1 << 3)
 138 #define         LCDDMA_CTRL_BE                  (1 << 1)
 139 #define         LCDDMA_CTRL_FB0_ONLY            0
 140 #define         LCDDMA_CTRL_FB0_FB1             (1 << 0)
 141 #define LCD_LCDDMA_FB0_BASE     0x44
 142 #define LCD_LCDDMA_FB0_CEILING  0x48
 143 #define LCD_LCDDMA_FB1_BASE     0x4C
 144 #define LCD_LCDDMA_FB1_CEILING  0x50
 145 #define LCD_SYSCONFIG           0x54
 146 #define         SYSCONFIG_STANDBY_FORCE         (0 << 4)
 147 #define         SYSCONFIG_STANDBY_NONE          (1 << 4)
 148 #define         SYSCONFIG_STANDBY_SMART         (2 << 4)
 149 #define         SYSCONFIG_IDLE_FORCE            (0 << 2)
 150 #define         SYSCONFIG_IDLE_NONE             (1 << 2)
 151 #define         SYSCONFIG_IDLE_SMART            (2 << 2)
 152 #define LCD_IRQSTATUS_RAW       0x58
 153 #define LCD_IRQSTATUS           0x5C
 154 #define LCD_IRQENABLE_SET       0x60
 155 #define LCD_IRQENABLE_CLEAR     0x64
 156 #define         IRQ_EOF1                (1 << 9)
 157 #define         IRQ_EOF0                (1 << 8)
 158 #define         IRQ_PL                  (1 << 6)
 159 #define         IRQ_FUF                 (1 << 5)
 160 #define         IRQ_ACB                 (1 << 3)
 161 #define         IRQ_SYNC_LOST           (1 << 2)
 162 #define         IRQ_RASTER_DONE         (1 << 1)
 163 #define         IRQ_FRAME_DONE          (1 << 0)
 164 #define LCD_END_OF_INT_IND      0x68
 165 #define LCD_CLKC_ENABLE         0x6C
 166 #define         CLKC_ENABLE_DMA         (1 << 2)
 167 #define         CLKC_ENABLE_LDID        (1 << 1)
 168 #define         CLKC_ENABLE_CORE        (1 << 0)
 169 #define LCD_CLKC_RESET          0x70
 170 #define         CLKC_RESET_MAIN         (1 << 3)
 171 #define         CLKC_RESET_DMA          (1 << 2)
 172 #define         CLKC_RESET_LDID         (1 << 1)
 173 #define         CLKC_RESET_CORE         (1 << 0)
 174
 175 #define LCD_LOCK(_sc)           mtx_lock(&(_sc)->sc_mtx)
 176 #define LCD_UNLOCK(_sc)         mtx_unlock(&(_sc)->sc_mtx)
 177 #define LCD_LOCK_INIT(_sc)      mtx_init(&(_sc)->sc_mtx, \
 178     device_get_nameunit(_sc->sc_dev), "am335x_lcd", MTX_DEF)
 179 #define LCD_LOCK_DESTROY(_sc)   mtx_destroy(&(_sc)->sc_mtx);
 180
 181 #define LCD_READ4(_sc, reg)     bus_read_4((_sc)->sc_mem_res, reg);
 182 #define LCD_WRITE4(_sc, reg, value)     \
 183     bus_write_4((_sc)->sc_mem_res, reg, value);
 184
 185 /* Backlight is controlled by eCAS interface on PWM unit 0 */
 186 #define PWM_UNIT        0
 187 #define PWM_PERIOD      100
 188
 189 #define MODE_HBP(mode)  ((mode)->htotal - (mode)->hsync_end)
 190 #define MODE_HFP(mode)  ((mode)->hsync_start - (mode)->hdisplay)
 191 #define MODE_HSW(mode)  ((mode)->hsync_end - (mode)->hsync_start)
 192 #define MODE_VBP(mode)  ((mode)->vtotal - (mode)->vsync_end)
 193 #define MODE_VFP(mode)  ((mode)->vsync_start - (mode)->vdisplay)
 194 #define MODE_VSW(mode)  ((mode)->vsync_end - (mode)->vsync_start)
 195
 196 #define MAX_PIXEL_CLOCK 126000
 197 #define MAX_BANDWIDTH   (1280*1024*60)
 198
 199 struct am335x_lcd_softc {
 200         device_t                sc_dev;
 201         struct fb_info          sc_fb_info;
 202         struct resource         *sc_mem_res;
 203         struct resource         *sc_irq_res;
 204         void                    *sc_intr_hl;
 205         struct mtx              sc_mtx;
 206         int                     sc_backlight;
 207         struct sysctl_oid       *sc_oid;
 208
 209         struct panel_info       sc_panel;
 210
 211         /* Framebuffer */
 212         bus_dma_tag_t           sc_dma_tag;
 213         bus_dmamap_t            sc_dma_map;
 214         size_t                  sc_fb_size;
 215         bus_addr_t              sc_fb_phys;
 216         uint8_t                 *sc_fb_base;
 217
 218         /* HDMI framer */
 219         phandle_t               sc_hdmi_framer;
 220         eventhandler_tag        sc_hdmi_evh;
 221 };
 222
 223 static void
 224 am335x_fb_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
 225 {
 226         bus_addr_t *addr;
 227
 228         if (err)
 229                 return;
 230
 231         addr = (bus_addr_t*)arg;
 232         *addr = segs[0].ds_addr;
 233 }
 234
 235 static uint32_t
 236 am335x_lcd_calc_divisor(uint32_t reference, uint32_t freq)
 237 {
 238         uint32_t div, i;
 239         uint32_t delta, min_delta;
 240
 241         min_delta = freq;
 242         div = 255;
 243
 244         /* Raster mode case: divisors are in range from 2 to 255 */
 245         for (i = 2; i < 255; i++) {
 246                 delta = abs(reference/i - freq);
 247                 if (delta < min_delta) {
 248                         div = i;
 249                         min_delta = delta;
 250                 }
 251         }
 252
 253         return (div);
 254 }
 255
 256 static int
 257 am335x_lcd_sysctl_backlight(SYSCTL_HANDLER_ARGS)
 258 {
 259         struct am335x_lcd_softc *sc = (struct am335x_lcd_softc*)arg1;
 260         int error;
 261         int backlight;
 262
 263         backlight = sc->sc_backlight;
 264         error = sysctl_handle_int(oidp, &backlight, 0, req);
 265
 266         if (error != 0 || req->newptr == NULL)
 267                 return (error);
 268
 269         if (backlight < 0)
 270                 backlight = 0;
 271         if (backlight > 100)
 272                 backlight = 100;
 273
 274         LCD_LOCK(sc);
 275         error = am335x_pwm_config_ecap(PWM_UNIT, PWM_PERIOD,
 276             backlight*PWM_PERIOD/100);
 277         if (error == 0)
 278                 sc->sc_backlight = backlight;
 279         LCD_UNLOCK(sc);
 280
 281         return (error);
 282 }
 283
 284 static uint32_t
 285 am335x_mode_vrefresh(const struct videomode *mode)
 286 {
 287         uint32_t refresh;
 288
 289         /* Calculate vertical refresh rate */
 290         refresh = (mode->dot_clock * 1000 / mode->htotal);
 291         refresh = (refresh + mode->vtotal / 2) / mode->vtotal;
 292
 293         if (mode->flags & VID_INTERLACE)
 294                 refresh *= 2;
 295         if (mode->flags & VID_DBLSCAN)
 296                 refresh /= 2;
 297
 298         return refresh;
 299 }
 300
 301 static int
 302 am335x_mode_is_valid(const struct videomode *mode)
 303 {
 304         uint32_t hbp, hfp, hsw;
 305         uint32_t vbp, vfp, vsw;
 306
 307         if (mode->dot_clock > MAX_PIXEL_CLOCK)
 308                 return (0);
 309
 310         if (mode->hdisplay & 0xf)
 311                 return (0);
 312
 313         if (mode->vdisplay > 2048)
 314                 return (0);
 315
 316         /* Check ranges for timing parameters */
 317         hbp = MODE_HBP(mode) - 1;
 318         hfp = MODE_HFP(mode) - 1;
 319         hsw = MODE_HSW(mode) - 1;
 320         vbp = MODE_VBP(mode);
 321         vfp = MODE_VFP(mode);
 322         vsw = MODE_VSW(mode) - 1;
 323
 324         if (hbp > 0x3ff)
 325                 return (0);
 326         if (hfp > 0x3ff)
 327                 return (0);
 328         if (hsw > 0x3ff)
 329                 return (0);
 330
 331         if (vbp > 0xff)
 332                 return (0);
 333         if (vfp > 0xff)
 334                 return (0);
 335         if (vsw > 0x3f)
 336                 return (0);
 337         if (mode->vdisplay*mode->hdisplay*am335x_mode_vrefresh(mode)
 338             > MAX_BANDWIDTH)
 339                 return (0);
 340
 341         return (1);
 342 }
 343
 344 static void
 345 am335x_read_hdmi_property(device_t dev)
 346 {
 347         phandle_t node, xref;
 348         phandle_t endpoint;
 349         phandle_t hdmi_xref;
 350         struct am335x_lcd_softc *sc;
 351
 352         sc = device_get_softc(dev);
 353         node = ofw_bus_get_node(dev);
 354         sc->sc_hdmi_framer = 0;
 355
 356         /*
 357          * Old FreeBSD way of referencing to HDMI framer
 358          */
 359         if (OF_getencprop(node, "hdmi", &hdmi_xref, sizeof(hdmi_xref)) != -1) {
 360                 sc->sc_hdmi_framer = hdmi_xref;
 361                 return;
 362         }
 363
 364         /*
 365          * Use bindings described in Linux docs:
 366          * bindings/media/video-interfaces.txt
 367          * We assume that the only endpoint in LCDC node
 368          * is HDMI framer.
 369          */
 370         node = ofw_bus_find_child(node, "port");
 371
 372         /* No media bindings */
 373         if (node == 0)
 374                 return;
 375
 376         for (endpoint = OF_child(node); endpoint != 0; endpoint = OF_peer(endpoint)) {
 377                 if (OF_getencprop(endpoint, "remote-endpoint", &xref, sizeof(xref)) != -1) {
 378                         /* port/port@0/endpoint@0 */
 379                         node = OF_node_from_xref(xref);
 380                         /* port/port@0 */
 381                         node = OF_parent(node);
 382                         /* port */
 383                         node = OF_parent(node);
 384                         /* actual owner of port, in our case HDMI framer */
 385                         sc->sc_hdmi_framer = OF_xref_from_node(OF_parent(node));
 386                         if (sc->sc_hdmi_framer != 0)
 387                                 return;
 388                 }
 389         }
 390 }
 391
 392 static int
 393 am335x_read_property(device_t dev, phandle_t node, const char *name, uint32_t *val)
 394 {
 395         pcell_t cell;
 396
 397         if ((OF_getencprop(node, name, &cell, sizeof(cell))) <= 0) {
 398                 device_printf(dev, "missing '%s' attribute in LCD panel info\n",
 399                     name);
 400                 return (ENXIO);
 401         }
 402
 403         *val = cell;
 404
 405         return (0);
 406 }
 407
 408 static int
 409 am335x_read_timing(device_t dev, phandle_t node, struct panel_info *panel)
 410 {
 411         int error;
 412         phandle_t timings_node, timing_node, native;
 413
 414         timings_node = ofw_bus_find_child(node, "display-timings");
 415         if (timings_node == 0) {
 416                 device_printf(dev, "no \"display-timings\" node\n");
 417                 return (-1);
 418         }
 419
 420         if (OF_searchencprop(timings_node, "native-mode", &native,
 421             sizeof(native)) == -1) {
 422                 device_printf(dev, "no \"native-mode\" reference in \"timings\" node\n");
 423                 return (-1);
 424         }
 425
 426         timing_node = OF_node_from_xref(native);
 427
 428         error = 0;
 429         if ((error = am335x_read_property(dev, timing_node,
 430             "hactive", &panel->panel_width)))
 431                 goto out;
 432
 433         if ((error = am335x_read_property(dev, timing_node,
 434             "vactive", &panel->panel_height)))
 435                 goto out;
 436
 437         if ((error = am335x_read_property(dev, timing_node,
 438             "hfront-porch", &panel->panel_hfp)))
 439                 goto out;
 440
 441         if ((error = am335x_read_property(dev, timing_node,
 442             "hback-porch", &panel->panel_hbp)))
 443                 goto out;
 444
 445         if ((error = am335x_read_property(dev, timing_node,
 446             "hsync-len", &panel->panel_hsw)))
 447                 goto out;
 448
 449         if ((error = am335x_read_property(dev, timing_node,
 450             "vfront-porch", &panel->panel_vfp)))
 451                 goto out;
 452
 453         if ((error = am335x_read_property(dev, timing_node,
 454             "vback-porch", &panel->panel_vbp)))
 455                 goto out;
 456
 457         if ((error = am335x_read_property(dev, timing_node,
 458             "vsync-len", &panel->panel_vsw)))
 459                 goto out;
 460
 461         if ((error = am335x_read_property(dev, timing_node,
 462             "clock-frequency", &panel->panel_pxl_clk)))
 463                 goto out;
 464
 465         if ((error = am335x_read_property(dev, timing_node,
 466             "pixelclk-active", &panel->pixelclk_active)))
 467                 goto out;
 468
 469         if ((error = am335x_read_property(dev, timing_node,
 470             "hsync-active", &panel->hsync_active)))
 471                 goto out;
 472
 473         if ((error = am335x_read_property(dev, timing_node,
 474             "vsync-active", &panel->vsync_active)))
 475                 goto out;
 476
 477 out:
 478         return (error);
 479 }
 480
 481 static int
 482 am335x_read_panel_info(device_t dev, phandle_t node, struct panel_info *panel)
 483 {
 484         phandle_t panel_info_node;
 485
 486         panel_info_node = ofw_bus_find_child(node, "panel-info");
 487         if (panel_info_node == 0)
 488                 return (-1);
 489
 490         am335x_read_property(dev, panel_info_node,
 491             "ac-bias", &panel->ac_bias);
 492
 493         am335x_read_property(dev, panel_info_node,
 494             "ac-bias-intrpt", &panel->ac_bias_intrpt);
 495
 496         am335x_read_property(dev, panel_info_node,
 497             "dma-burst-sz", &panel->dma_burst_sz);
 498
 499         am335x_read_property(dev, panel_info_node,
 500             "bpp", &panel->bpp);
 501
 502         am335x_read_property(dev, panel_info_node,
 503             "fdd", &panel->fdd);
 504
 505         am335x_read_property(dev, panel_info_node,
 506             "sync-edge", &panel->sync_edge);
 507
 508         am335x_read_property(dev, panel_info_node,
 509             "sync-ctrl", &panel->sync_ctrl);
 510
 511         return (0);
 512 }
 513
 514 static void
 515 am335x_lcd_intr(void *arg)
 516 {
 517         struct am335x_lcd_softc *sc = arg;
 518         uint32_t reg;
 519
 520         reg = LCD_READ4(sc, LCD_IRQSTATUS);
 521         LCD_WRITE4(sc, LCD_IRQSTATUS, reg);
 522         /* Read value back to make sure it reached the hardware */
 523         reg = LCD_READ4(sc, LCD_IRQSTATUS);
 524
 525         if (reg & IRQ_SYNC_LOST) {
 526                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 527                 reg &= ~RASTER_CTRL_LCDEN;
 528                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 529
 530                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 531                 reg |= RASTER_CTRL_LCDEN;
 532                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 533                 goto done;
 534         }
 535
 536         if (reg & IRQ_PL) {
 537                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 538                 reg &= ~RASTER_CTRL_LCDEN;
 539                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 540
 541                 reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 542                 reg |= RASTER_CTRL_LCDEN;
 543                 LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 544                 goto done;
 545         }
 546
 547         if (reg & IRQ_EOF0) {
 548                 LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys);
 549                 LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 550                 reg &= ~IRQ_EOF0;
 551         }
 552
 553         if (reg & IRQ_EOF1) {
 554                 LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys);
 555                 LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 556                 reg &= ~IRQ_EOF1;
 557         }
 558
 559         if (reg & IRQ_FUF) {
 560                 /* TODO: Handle FUF */
 561         }
 562
 563         if (reg & IRQ_ACB) {
 564                 /* TODO: Handle ACB */
 565         }
 566
 567 done:
 568         LCD_WRITE4(sc, LCD_END_OF_INT_IND, 0);
 569         /* Read value back to make sure it reached the hardware */
 570         reg = LCD_READ4(sc, LCD_END_OF_INT_IND);
 571 }
 572
 573 static const struct videomode *
 574 am335x_lcd_pick_mode(struct edid_info *ei)
 575 {
 576         const struct videomode *videomode;
 577         const struct videomode *m;
 578         int n;
 579
 580         /* Get standard VGA as default */
 581         videomode = NULL;
 582
 583         /*
 584          * Pick a mode.
 585          */
 586         if (ei->edid_preferred_mode != NULL) {
 587                 if (am335x_mode_is_valid(ei->edid_preferred_mode))
 588                         videomode = ei->edid_preferred_mode;
 589         }
 590
 591         if (videomode == NULL) {
 592                 m = ei->edid_modes;
 593
 594                 sort_modes(ei->edid_modes,
 595                     &ei->edid_preferred_mode,
 596                     ei->edid_nmodes);
 597                 for (n = 0; n < ei->edid_nmodes; n++)
 598                         if (am335x_mode_is_valid(&m[n])) {
 599                                 videomode = &m[n];
 600                                 break;
 601                         }
 602         }
 603
 604         return videomode;
 605 }
 606
 607 static int
 608 am335x_lcd_configure(struct am335x_lcd_softc *sc)
 609 {
 610         int div;
 611         uint32_t reg, timing0, timing1, timing2;
 612         uint32_t burst_log;
 613         size_t dma_size;
 614         uint32_t hbp, hfp, hsw;
 615         uint32_t vbp, vfp, vsw;
 616         uint32_t width, height;
 617         unsigned int ref_freq;
 618         int err;
 619
 620         /*
 621          * try to adjust clock to get double of requested frequency
 622          * HDMI/DVI displays are very sensitive to error in frequncy value
 623          */
 624         if (ti_prcm_clk_set_source_freq(LCDC_CLK, sc->sc_panel.panel_pxl_clk*2)) {
 625                 device_printf(sc->sc_dev, "can't set source frequency\n");
 626                 return (ENXIO);
 627         }
 628
 629         if (ti_prcm_clk_get_source_freq(LCDC_CLK, &ref_freq)) {
 630                 device_printf(sc->sc_dev, "can't get reference frequency\n");
 631                 return (ENXIO);
 632         }
 633
 634         /* Panle initialization */
 635         dma_size = round_page(sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8);
 636
 637         /*
 638          * Now allocate framebuffer memory
 639          */
 640         err = bus_dma_tag_create(
 641             bus_get_dma_tag(sc->sc_dev),
 642             4, 0,               /* alignment, boundary */
 643             BUS_SPACE_MAXADDR_32BIT,    /* lowaddr */
 644             BUS_SPACE_MAXADDR,          /* highaddr */
 645             NULL, NULL,                 /* filter, filterarg */
 646             dma_size, 1,                        /* maxsize, nsegments */
 647             dma_size, 0,                        /* maxsegsize, flags */
 648             NULL, NULL,                 /* lockfunc, lockarg */
 649             &sc->sc_dma_tag);
 650         if (err)
 651                 goto done;
 652
 653         err = bus_dmamem_alloc(sc->sc_dma_tag, (void **)&sc->sc_fb_base,
 654             BUS_DMA_COHERENT, &sc->sc_dma_map);
 655
 656         if (err) {
 657                 device_printf(sc->sc_dev, "cannot allocate framebuffer\n");
 658                 goto done;
 659         }
 660
 661         err = bus_dmamap_load(sc->sc_dma_tag, sc->sc_dma_map, sc->sc_fb_base,
 662             dma_size, am335x_fb_dmamap_cb, &sc->sc_fb_phys, BUS_DMA_NOWAIT);
 663
 664         if (err) {
 665                 device_printf(sc->sc_dev, "cannot load DMA map\n");
 666                 goto done;
 667         }
 668
 669         /* Make sure it's blank */
 670         memset(sc->sc_fb_base, 0x0, dma_size);
 671
 672         /* Calculate actual FB Size */
 673         sc->sc_fb_size = sc->sc_panel.panel_width*sc->sc_panel.panel_height*sc->sc_panel.bpp/8;
 674
 675         /* Only raster mode is supported */
 676         reg = CTRL_RASTER_MODE;
 677         div = am335x_lcd_calc_divisor(ref_freq, sc->sc_panel.panel_pxl_clk);
 678         reg |= (div << CTRL_DIV_SHIFT);
 679         LCD_WRITE4(sc, LCD_CTRL, reg);
 680
 681         /* Set timing */
 682         timing0 = timing1 = timing2 = 0;
 683
 684         hbp = sc->sc_panel.panel_hbp - 1;
 685         hfp = sc->sc_panel.panel_hfp - 1;
 686         hsw = sc->sc_panel.panel_hsw - 1;
 687
 688         vbp = sc->sc_panel.panel_vbp;
 689         vfp = sc->sc_panel.panel_vfp;
 690         vsw = sc->sc_panel.panel_vsw - 1;
 691
 692         height = sc->sc_panel.panel_height - 1;
 693         width = sc->sc_panel.panel_width - 1;
 694
 695         /* Horizontal back porch */
 696         timing0 |= (hbp & 0xff) << RASTER_TIMING_0_HBP_SHIFT;
 697         timing2 |= ((hbp >> 8) & 3) << RASTER_TIMING_2_HBPHI_SHIFT;
 698         /* Horizontal front porch */
 699         timing0 |= (hfp & 0xff) << RASTER_TIMING_0_HFP_SHIFT;
 700         timing2 |= ((hfp >> 8) & 3) << RASTER_TIMING_2_HFPHI_SHIFT;
 701         /* Horizontal sync width */
 702         timing0 |= (hsw & 0x3f) << RASTER_TIMING_0_HSW_SHIFT;
 703         timing2 |= ((hsw >> 6) & 0xf) << RASTER_TIMING_2_HSWHI_SHIFT;
 704
 705         /* Vertical back porch, front porch, sync width */
 706         timing1 |= (vbp & 0xff) << RASTER_TIMING_1_VBP_SHIFT;
 707         timing1 |= (vfp & 0xff) << RASTER_TIMING_1_VFP_SHIFT;
 708         timing1 |= (vsw & 0x3f) << RASTER_TIMING_1_VSW_SHIFT;
 709
 710         /* Pixels per line */
 711         timing0 |= ((width >> 10) & 1)
 712             << RASTER_TIMING_0_PPLMSB_SHIFT;
 713         timing0 |= ((width >> 4) & 0x3f)
 714             << RASTER_TIMING_0_PPLLSB_SHIFT;
 715
 716         /* Lines per panel */
 717         timing1 |= (height & 0x3ff)
 718             << RASTER_TIMING_1_LPP_SHIFT;
 719         timing2 |= ((height >> 10 ) & 1)
 720             << RASTER_TIMING_2_LPP_B10_SHIFT;
 721
 722         /* clock signal settings */
 723         if (sc->sc_panel.sync_ctrl)
 724                 timing2 |= RASTER_TIMING_2_PHSVS;
 725         if (sc->sc_panel.sync_edge)
 726                 timing2 |= RASTER_TIMING_2_PHSVS_RISE;
 727         else
 728                 timing2 |= RASTER_TIMING_2_PHSVS_FALL;
 729         if (sc->sc_panel.hsync_active == 0)
 730                 timing2 |= RASTER_TIMING_2_IHS;
 731         if (sc->sc_panel.vsync_active == 0)
 732                 timing2 |= RASTER_TIMING_2_IVS;
 733         if (sc->sc_panel.pixelclk_active == 0)
 734                 timing2 |= RASTER_TIMING_2_IPC;
 735
 736         /* AC bias */
 737         timing2 |= (sc->sc_panel.ac_bias << RASTER_TIMING_2_ACB_SHIFT);
 738         timing2 |= (sc->sc_panel.ac_bias_intrpt << RASTER_TIMING_2_ACBI_SHIFT);
 739
 740         LCD_WRITE4(sc, LCD_RASTER_TIMING_0, timing0);
 741         LCD_WRITE4(sc, LCD_RASTER_TIMING_1, timing1);
 742         LCD_WRITE4(sc, LCD_RASTER_TIMING_2, timing2);
 743
 744         /* DMA settings */
 745         reg = LCDDMA_CTRL_FB0_FB1;
 746         /* Find power of 2 for current burst size */
 747         switch (sc->sc_panel.dma_burst_sz) {
 748         case 1:
 749                 burst_log = 0;
 750                 break;
 751         case 2:
 752                 burst_log = 1;
 753                 break;
 754         case 4:
 755                 burst_log = 2;
 756                 break;
 757         case 8:
 758                 burst_log = 3;
 759                 break;
 760         case 16:
 761         default:
 762                 burst_log = 4;
 763                 break;
 764         }
 765         reg |= (burst_log << LCDDMA_CTRL_BURST_SIZE_SHIFT);
 766         /* XXX: FIFO TH */
 767         reg |= (0 << LCDDMA_CTRL_TH_FIFO_RDY_SHIFT);
 768         LCD_WRITE4(sc, LCD_LCDDMA_CTRL, reg);
 769
 770         LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys);
 771         LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 772         LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys);
 773         LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1);
 774
 775         /* Enable LCD */
 776         reg = RASTER_CTRL_LCDTFT;
 777         reg |= (sc->sc_panel.fdd << RASTER_CTRL_REQDLY_SHIFT);
 778         reg |= (PALETTE_DATA_ONLY << RASTER_CTRL_PALMODE_SHIFT);
 779         if (sc->sc_panel.bpp >= 24)
 780                 reg |= RASTER_CTRL_TFT24;
 781         if (sc->sc_panel.bpp == 32)
 782                 reg |= RASTER_CTRL_TFT24_UNPACKED;
 783         LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 784
 785         LCD_WRITE4(sc, LCD_CLKC_ENABLE,
 786             CLKC_ENABLE_DMA | CLKC_ENABLE_LDID | CLKC_ENABLE_CORE);
 787
 788         LCD_WRITE4(sc, LCD_CLKC_RESET, CLKC_RESET_MAIN);
 789         DELAY(100);
 790         LCD_WRITE4(sc, LCD_CLKC_RESET, 0);
 791
 792         reg = IRQ_EOF1 | IRQ_EOF0 | IRQ_FUF | IRQ_PL |
 793             IRQ_ACB | IRQ_SYNC_LOST |  IRQ_RASTER_DONE |
 794             IRQ_FRAME_DONE;
 795         LCD_WRITE4(sc, LCD_IRQENABLE_SET, reg);
 796
 797         reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 798         reg |= RASTER_CTRL_LCDEN;
 799         LCD_WRITE4(sc, LCD_RASTER_CTRL, reg);
 800
 801         LCD_WRITE4(sc, LCD_SYSCONFIG,
 802             SYSCONFIG_STANDBY_SMART | SYSCONFIG_IDLE_SMART);
 803
 804         sc->sc_fb_info.fb_name = device_get_nameunit(sc->sc_dev);
 805         sc->sc_fb_info.fb_vbase = (intptr_t)sc->sc_fb_base;
 806         sc->sc_fb_info.fb_pbase = sc->sc_fb_phys;
 807         sc->sc_fb_info.fb_size = sc->sc_fb_size;
 808         sc->sc_fb_info.fb_bpp = sc->sc_fb_info.fb_depth = sc->sc_panel.bpp;
 809         sc->sc_fb_info.fb_stride = sc->sc_panel.panel_width*sc->sc_panel.bpp / 8;
 810         sc->sc_fb_info.fb_width = sc->sc_panel.panel_width;
 811         sc->sc_fb_info.fb_height = sc->sc_panel.panel_height;
 812
 813 #ifdef  DEV_SC
 814         err = (sc_attach_unit(device_get_unit(sc->sc_dev),
 815             device_get_flags(sc->sc_dev) | SC_AUTODETECT_KBD));
 816
 817         if (err) {
 818                 device_printf(sc->sc_dev, "failed to attach syscons\n");
 819                 goto fail;
 820         }
 821
 822         am335x_lcd_syscons_setup((vm_offset_t)sc->sc_fb_base, sc->sc_fb_phys, &panel);
 823 #else /* VT */
 824         device_t fbd = device_add_child(sc->sc_dev, "fbd",
 825         device_get_unit(sc->sc_dev));
 826         if (fbd != NULL) {
 827                 if (device_probe_and_attach(fbd) != 0)
 828                         device_printf(sc->sc_dev, "failed to attach fbd device\n");
 829         } else
 830                 device_printf(sc->sc_dev, "failed to add fbd child\n");
 831 #endif
 832
 833 done:
 834         return (err);
 835 }
 836
 837 static void
 838 am335x_lcd_hdmi_event(void *arg, device_t hdmi, int event)
 839 {
 840         struct am335x_lcd_softc *sc;
 841         const struct videomode *videomode;
 842         struct videomode hdmi_mode;
 843         device_t hdmi_dev;
 844         uint8_t *edid;
 845         uint32_t edid_len;
 846         struct edid_info ei;
 847
 848         sc = arg;
 849
 850         /* Nothing to work with */
 851         if (!sc->sc_hdmi_framer) {
 852                 device_printf(sc->sc_dev, "HDMI event without HDMI framer set\n");
 853                 return;
 854         }
 855
 856         hdmi_dev = OF_device_from_xref(sc->sc_hdmi_framer);
 857         if (!hdmi_dev) {
 858                 device_printf(sc->sc_dev, "no actual device for \"hdmi\" property\n");
 859                 return;
 860         }
 861
 862         edid = NULL;
 863         edid_len = 0;
 864         if (HDMI_GET_EDID(hdmi_dev, &edid, &edid_len) != 0) {
 865                 device_printf(sc->sc_dev, "failed to get EDID info from HDMI framer\n");
 866                 return;
 867         }
 868
 869         videomode = NULL;
 870
 871         if (edid_parse(edid, &ei) == 0) {
 872                 edid_print(&ei);
 873                 videomode = am335x_lcd_pick_mode(&ei);
 874         } else
 875                 device_printf(sc->sc_dev, "failed to parse EDID\n");
 876
 877         /* Use standard VGA as fallback */
 878         if (videomode == NULL)
 879                 videomode = pick_mode_by_ref(640, 480, 60);
 880
 881         if (videomode == NULL) {
 882                 device_printf(sc->sc_dev, "failed to find usable videomode");
 883                 return;
 884         }
 885
 886         device_printf(sc->sc_dev, "detected videomode: %dx%d @ %dKHz\n", videomode->hdisplay,
 887                 videomode->vdisplay, am335x_mode_vrefresh(videomode));
 888
 889         sc->sc_panel.panel_width = videomode->hdisplay;
 890         sc->sc_panel.panel_height = videomode->vdisplay;
 891         sc->sc_panel.panel_hfp = videomode->hsync_start - videomode->hdisplay;
 892         sc->sc_panel.panel_hbp = videomode->htotal - videomode->hsync_end;
 893         sc->sc_panel.panel_hsw = videomode->hsync_end - videomode->hsync_start;
 894         sc->sc_panel.panel_vfp = videomode->vsync_start - videomode->vdisplay;
 895         sc->sc_panel.panel_vbp = videomode->vtotal - videomode->vsync_end;
 896         sc->sc_panel.panel_vsw = videomode->vsync_end - videomode->vsync_start;
 897         sc->sc_panel.pixelclk_active = 1;
 898
 899         /* logic for HSYNC should be reversed */
 900         if (videomode->flags & VID_NHSYNC)
 901                 sc->sc_panel.hsync_active = 1;
 902         else
 903                 sc->sc_panel.hsync_active = 0;
 904
 905         if (videomode->flags & VID_NVSYNC)
 906                 sc->sc_panel.vsync_active = 0;
 907         else
 908                 sc->sc_panel.vsync_active = 1;
 909
 910         sc->sc_panel.panel_pxl_clk = videomode->dot_clock * 1000;
 911
 912         am335x_lcd_configure(sc);
 913
 914         memcpy(&hdmi_mode, videomode, sizeof(hdmi_mode));
 915         hdmi_mode.hskew = videomode->hsync_end - videomode->hsync_start;
 916         hdmi_mode.flags |= VID_HSKEW;
 917
 918         HDMI_SET_VIDEOMODE(hdmi_dev, &hdmi_mode);
 919 }
 920
 921 static int
 922 am335x_lcd_probe(device_t dev)
 923 {
 924 #ifdef DEV_SC
 925         int err;
 926 #endif
 927
 928         if (!ofw_bus_status_okay(dev))
 929                 return (ENXIO);
 930
 931         if (!ofw_bus_is_compatible(dev, "ti,am33xx-tilcdc"))
 932                 return (ENXIO);
 933
 934         device_set_desc(dev, "AM335x LCD controller");
 935
 936 #ifdef DEV_SC
 937         err = sc_probe_unit(device_get_unit(dev),
 938             device_get_flags(dev) | SC_AUTODETECT_KBD);
 939         if (err != 0)
 940                 return (err);
 941 #endif
 942
 943         return (BUS_PROBE_DEFAULT);
 944 }
 945
 946 static int
 947 am335x_lcd_attach(device_t dev)
 948 {
 949         struct am335x_lcd_softc *sc;
 950
 951         int err;
 952         int rid;
 953         struct sysctl_ctx_list *ctx;
 954         struct sysctl_oid *tree;
 955         phandle_t root, panel_node;
 956
 957         err = 0;
 958         sc = device_get_softc(dev);
 959         sc->sc_dev = dev;
 960
 961         am335x_read_hdmi_property(dev);
 962
 963         root = OF_finddevice("/");
 964         if (root == -1) {
 965                 device_printf(dev, "failed to get FDT root node\n");
 966                 return (ENXIO);
 967         }
 968
 969         sc->sc_panel.ac_bias = 255;
 970         sc->sc_panel.ac_bias_intrpt = 0;
 971         sc->sc_panel.dma_burst_sz = 16;
 972         sc->sc_panel.bpp = 16;
 973         sc->sc_panel.fdd = 128;
 974         sc->sc_panel.sync_edge = 0;
 975         sc->sc_panel.sync_ctrl = 1;
 976
 977         panel_node = fdt_find_compatible(root, "ti,tilcdc,panel", 1);
 978         if (panel_node != 0) {
 979                 device_printf(dev, "using static panel info\n");
 980                 if (am335x_read_panel_info(dev, panel_node, &sc->sc_panel)) {
 981                         device_printf(dev, "failed to read panel info\n");
 982                         return (ENXIO);
 983                 }
 984
 985                 if (am335x_read_timing(dev, panel_node, &sc->sc_panel)) {
 986                         device_printf(dev, "failed to read timings\n");
 987                         return (ENXIO);
 988                 }
 989         }
 990
 991         ti_prcm_clk_enable(LCDC_CLK);
 992
 993         rid = 0;
 994         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
 995             RF_ACTIVE);
 996         if (!sc->sc_mem_res) {
 997                 device_printf(dev, "cannot allocate memory window\n");
 998                 return (ENXIO);
 999         }
1000
1001         rid = 0;
1002         sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
1003             RF_ACTIVE);
1004         if (!sc->sc_irq_res) {
1005                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
1006                 device_printf(dev, "cannot allocate interrupt\n");
1007                 return (ENXIO);
1008         }
1009
1010         if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
1011                         NULL, am335x_lcd_intr, sc,
1012                         &sc->sc_intr_hl) != 0) {
1013                 bus_release_resource(dev, SYS_RES_IRQ, rid,
1014                     sc->sc_irq_res);
1015                 bus_release_resource(dev, SYS_RES_MEMORY, rid,
1016                     sc->sc_mem_res);
1017                 device_printf(dev, "Unable to setup the irq handler.\n");
1018                 return (ENXIO);
1019         }
1020
1021         LCD_LOCK_INIT(sc);
1022
1023         /* Init backlight interface */
1024         ctx = device_get_sysctl_ctx(sc->sc_dev);
1025         tree = device_get_sysctl_tree(sc->sc_dev);
1026         sc->sc_oid = SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
1027             "backlight", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
1028             am335x_lcd_sysctl_backlight, "I", "LCD backlight");
1029         sc->sc_backlight = 0;
1030         /* Check if eCAS interface is available at this point */
1031         if (am335x_pwm_config_ecap(PWM_UNIT,
1032             PWM_PERIOD, PWM_PERIOD) == 0)
1033                 sc->sc_backlight = 100;
1034
1035         if (panel_node != 0)
1036                 am335x_lcd_configure(sc);
1037         else
1038                 sc->sc_hdmi_evh = EVENTHANDLER_REGISTER(hdmi_event,
1039                     am335x_lcd_hdmi_event, sc, EVENTHANDLER_PRI_ANY);
1040
1041         return (0);
1042 }
1043
1044 static int
1045 am335x_lcd_detach(device_t dev)
1046 {
1047         /* Do not let unload driver */
1048         return (EBUSY);
1049 }
1050
1051 static struct fb_info *
1052 am335x_lcd_fb_getinfo(device_t dev)
1053 {
1054         struct am335x_lcd_softc *sc;
1055
1056         sc = device_get_softc(dev);
1057
1058         return (&sc->sc_fb_info);
1059 }
1060
1061 static device_method_t am335x_lcd_methods[] = {
1062         DEVMETHOD(device_probe,         am335x_lcd_probe),
1063         DEVMETHOD(device_attach,        am335x_lcd_attach),
1064         DEVMETHOD(device_detach,        am335x_lcd_detach),
1065
1066         /* Framebuffer service methods */
1067         DEVMETHOD(fb_getinfo,           am335x_lcd_fb_getinfo),
1068
1069         DEVMETHOD_END
1070 };
1071
1072 static driver_t am335x_lcd_driver = {
1073         "fb",
1074         am335x_lcd_methods,
1075         sizeof(struct am335x_lcd_softc),
1076 };
1077
1078 static devclass_t am335x_lcd_devclass;
1079
1080 DRIVER_MODULE(am335x_lcd, simplebus, am335x_lcd_driver, am335x_lcd_devclass, 0, 0);
1081 MODULE_VERSION(am335x_lcd, 1);
1082 MODULE_DEPEND(am335x_lcd, simplebus, 1, 1, 1);