drivers/video/exynos_fb.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  *
   4  * Author: InKi Dae <inki.dae@samsung.com>
   5  * Author: Donghwa Lee <dh09.lee@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <config.h>
  24 #include <common.h>
  25 #include <lcd.h>
  26 #include <fdtdec.h>
  27 #include <libfdt.h>
  28 #include <asm/io.h>
  29 #include <asm/arch/cpu.h>
  30 #include <asm/arch/clock.h>
  31 #include <asm/arch/clk.h>
  32 #include <asm/arch/mipi_dsim.h>
  33 #include <asm/arch/dp_info.h>
  34 #include <asm/arch/system.h>
  35 #include <asm-generic/errno.h>
  36
  37 #include "exynos_fb.h"
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 int lcd_line_length;
  42 int lcd_color_fg;
  43 int lcd_color_bg;
  44
  45 void *lcd_base;
  46 void *lcd_console_address;
  47
  48 short console_col;
  49 short console_row;
  50
  51 static unsigned int panel_width, panel_height;
  52
  53 /*
  54  * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
  55  * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
  56  * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
  57  * is called. So, we are forced to statically assign it.
  58  */
  59 #ifdef CONFIG_OF_CONTROL
  60 vidinfo_t panel_info  = {
  61         .vl_col = LCD_XRES,
  62         .vl_row = LCD_YRES,
  63         .vl_bpix = LCD_COLOR16,
  64 };
  65 #endif
  66
  67 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  68 {
  69         unsigned long palette_size;
  70         unsigned int fb_size;
  71
  72         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  73
  74         lcd_base = lcdbase;
  75
  76         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  77
  78         exynos_fimd_lcd_init_mem((unsigned long)lcd_base,
  79                         (unsigned long)fb_size, palette_size);
  80 }
  81
  82 static void exynos_lcd_init(vidinfo_t *vid)
  83 {
  84         exynos_fimd_lcd_init(vid);
  85
  86         /* Enable flushing after LCD writes if requested */
  87         lcd_set_flush_dcache(1);
  88 }
  89
  90 #ifdef CONFIG_CMD_BMP
  91 static void draw_logo(void)
  92 {
  93         int x, y;
  94         ulong addr;
  95
  96         if (panel_width >= panel_info.logo_width) {
  97                 x = ((panel_width - panel_info.logo_width) >> 1);
  98         } else {
  99                 x = 0;
 100                 printf("Warning: image width is bigger than display width\n");
 101         }
 102
 103         if (panel_height >= panel_info.logo_height) {
 104                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
 105         } else {
 106                 y = 0;
 107                 printf("Warning: image height is bigger than display height\n");
 108         }
 109
 110         addr = panel_info.logo_addr;
 111         bmp_display(addr, x, y);
 112 }
 113 #endif
 114
 115 void __exynos_cfg_lcd_gpio(void)
 116 {
 117 }
 118 void exynos_cfg_lcd_gpio(void)
 119         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 120
 121 void __exynos_backlight_on(unsigned int onoff)
 122 {
 123 }
 124 void exynos_backlight_on(unsigned int onoff)
 125         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 126
 127 void __exynos_reset_lcd(void)
 128 {
 129 }
 130 void exynos_reset_lcd(void)
 131         __attribute__((weak, alias("__exynos_reset_lcd")));
 132
 133 void __exynos_lcd_power_on(void)
 134 {
 135 }
 136 void exynos_lcd_power_on(void)
 137         __attribute__((weak, alias("__exynos_lcd_power_on")));
 138
 139 void __exynos_cfg_ldo(void)
 140 {
 141 }
 142 void exynos_cfg_ldo(void)
 143         __attribute__((weak, alias("__exynos_cfg_ldo")));
 144
 145 void __exynos_enable_ldo(unsigned int onoff)
 146 {
 147 }
 148 void exynos_enable_ldo(unsigned int onoff)
 149         __attribute__((weak, alias("__exynos_enable_ldo")));
 150
 151 void __exynos_backlight_reset(void)
 152 {
 153 }
 154 void exynos_backlight_reset(void)
 155         __attribute__((weak, alias("__exynos_backlight_reset")));
 156
 157 static void lcd_panel_on(vidinfo_t *vid)
 158 {
 159         udelay(vid->init_delay);
 160
 161         exynos_backlight_reset();
 162
 163         exynos_cfg_lcd_gpio();
 164
 165         exynos_lcd_power_on();
 166
 167         udelay(vid->power_on_delay);
 168
 169         if (vid->dp_enabled)
 170                 exynos_init_dp();
 171
 172         exynos_reset_lcd();
 173
 174         udelay(vid->reset_delay);
 175
 176         exynos_backlight_on(1);
 177
 178         exynos_cfg_ldo();
 179
 180         exynos_enable_ldo(1);
 181
 182         if (vid->mipi_enabled)
 183                 exynos_mipi_dsi_init();
 184 }
 185
 186 #ifdef CONFIG_OF_CONTROL
 187 int exynos_fimd_parse_dt(const void *blob)
 188 {
 189         unsigned int node;
 190         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 191         if (node <= 0) {
 192                 debug("exynos_fb: Can't get device node for fimd\n");
 193                 return -ENODEV;
 194         }
 195
 196         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 197         if (panel_info.vl_col == 0) {
 198                 debug("Can't get XRES\n");
 199                 return -ENXIO;
 200         }
 201
 202         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 203         if (panel_info.vl_row == 0) {
 204                 debug("Can't get YRES\n");
 205                 return -ENXIO;
 206         }
 207
 208         panel_info.vl_width = fdtdec_get_int(blob, node,
 209                                                 "samsung,vl-width", 0);
 210
 211         panel_info.vl_height = fdtdec_get_int(blob, node,
 212                                                 "samsung,vl-height", 0);
 213
 214         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 215         if (panel_info.vl_freq == 0) {
 216                 debug("Can't get refresh rate\n");
 217                 return -ENXIO;
 218         }
 219
 220         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 221                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 222
 223         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 224                 panel_info.vl_oep = CONFIG_SYS_LOW;
 225
 226         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 227                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 228
 229         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 230                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 231
 232         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 233                 panel_info.vl_dp = CONFIG_SYS_LOW;
 234
 235         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 236         if (panel_info.vl_bpix == 0) {
 237                 debug("Can't get bits per pixel\n");
 238                 return -ENXIO;
 239         }
 240
 241         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 242         if (panel_info.vl_hspw == 0) {
 243                 debug("Can't get hsync width\n");
 244                 return -ENXIO;
 245         }
 246
 247         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 248         if (panel_info.vl_hfpd == 0) {
 249                 debug("Can't get right margin\n");
 250                 return -ENXIO;
 251         }
 252
 253         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 254                                                         "samsung,vl-hbpd", 0);
 255         if (panel_info.vl_hbpd == 0) {
 256                 debug("Can't get left margin\n");
 257                 return -ENXIO;
 258         }
 259
 260         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 261                                                         "samsung,vl-vspw", 0);
 262         if (panel_info.vl_vspw == 0) {
 263                 debug("Can't get vsync width\n");
 264                 return -ENXIO;
 265         }
 266
 267         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 268                                                         "samsung,vl-vfpd", 0);
 269         if (panel_info.vl_vfpd == 0) {
 270                 debug("Can't get lower margin\n");
 271                 return -ENXIO;
 272         }
 273
 274         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 275         if (panel_info.vl_vbpd == 0) {
 276                 debug("Can't get upper margin\n");
 277                 return -ENXIO;
 278         }
 279
 280         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 281                                                 "samsung,vl-cmd-allow-len", 0);
 282
 283         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 284         panel_info.init_delay = fdtdec_get_int(blob, node,
 285                                                 "samsung,init-delay", 0);
 286         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 287                                                 "samsung,power-on-delay", 0);
 288         panel_info.reset_delay = fdtdec_get_int(blob, node,
 289                                                 "samsung,reset-delay", 0);
 290         panel_info.interface_mode = fdtdec_get_int(blob, node,
 291                                                 "samsung,interface-mode", 0);
 292         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 293                                                 "samsung,mipi-enabled", 0);
 294         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 295                                                 "samsung,dp-enabled", 0);
 296         panel_info.cs_setup = fdtdec_get_int(blob, node,
 297                                                 "samsung,cs-setup", 0);
 298         panel_info.wr_setup = fdtdec_get_int(blob, node,
 299                                                 "samsung,wr-setup", 0);
 300         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 301         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 302
 303         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 304         if (panel_info.logo_on) {
 305                 panel_info.logo_width = fdtdec_get_int(blob, node,
 306                                                 "samsung,logo-width", 0);
 307                 panel_info.logo_height = fdtdec_get_int(blob, node,
 308                                                 "samsung,logo-height", 0);
 309                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 310                                                 "samsung,logo-addr", 0);
 311         }
 312
 313         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 314                                                 "samsung,rgb-mode", 0);
 315         panel_info.pclk_name = fdtdec_get_int(blob, node,
 316                                                 "samsung,pclk-name", 0);
 317         panel_info.sclk_div = fdtdec_get_int(blob, node,
 318                                                 "samsung,sclk-div", 0);
 319         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 320                                                 "samsung,dual-lcd-enabled", 0);
 321
 322         return 0;
 323 }
 324 #endif
 325
 326 void lcd_ctrl_init(void *lcdbase)
 327 {
 328         set_system_display_ctrl();
 329         set_lcd_clk();
 330
 331 #ifdef CONFIG_OF_CONTROL
 332         if (exynos_fimd_parse_dt(gd->fdt_blob))
 333                 debug("Can't get proper panel info\n");
 334 #endif
 335         /* initialize parameters which is specific to panel. */
 336         init_panel_info(&panel_info);
 337
 338         panel_width = panel_info.vl_width;
 339         panel_height = panel_info.vl_height;
 340
 341         exynos_lcd_init_mem(lcdbase, &panel_info);
 342
 343         exynos_lcd_init(&panel_info);
 344 }
 345
 346 void lcd_enable(void)
 347 {
 348         if (panel_info.logo_on) {
 349                 memset(lcd_base, 0, panel_width * panel_height *
 350                                 (NBITS(panel_info.vl_bpix) >> 3));
 351 #ifdef CONFIG_CMD_BMP
 352                 draw_logo();
 353 #endif
 354         }
 355
 356         lcd_panel_on(&panel_info);
 357 }
 358
 359 /* dummy function */
 360 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 361 {
 362         return;
 363 }