LXR uboot/board/compulab/common/omap3

   1/*
   2 * (C) Copyright 2012 - 2013 CompuLab, Ltd. <www.compulab.co.il>
   3 *
   4 * Authors: Nikita Kiryanov <nikita@compulab.co.il>
   5 *
   6 * Parsing code based on linux/drivers/video/pxafb.c
   7 *
   8 * SPDX-License-Identifier:     GPL-2.0+
   9 */
  10
  11#include <common.h>
  12#include <asm/gpio.h>
  13#include <asm/io.h>
  14#include <stdio_dev.h>
  15#include <asm/arch/dss.h>
  16#include <lcd.h>
  17#include <scf0403_lcd.h>
  18#include <asm/arch-omap3/dss.h>
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22enum display_type {
  23        NONE,
  24        DVI,
  25        DVI_CUSTOM,
  26        DATA_IMAGE, /* #define CONFIG_SCF0403_LCD to use */
  27};
  28
  29#define CMAP_ADDR       0x80100000
  30
  31/*
  32 * The frame buffer is allocated before we have the chance to parse user input.
  33 * To make sure enough memory is allocated for all resolutions, we define
  34 * vl_{col | row} to the maximal resolution supported by OMAP3.
  35 */
  36vidinfo_t panel_info = {
  37        .vl_col  = 1400,
  38        .vl_row  = 1050,
  39        .vl_bpix = LCD_BPP,
  40        .cmap = (ushort *)CMAP_ADDR,
  41};
  42
  43static struct panel_config panel_cfg;
  44static enum display_type lcd_def;
  45
  46/*
  47 * A note on DVI presets;
  48 * U-Boot can convert 8 bit BMP data to 16 bit BMP data, and OMAP DSS can
  49 * convert 16 bit data into 24 bit data. Thus, GFXFORMAT_RGB16 allows us to
  50 * support two BMP types with one setting.
  51 */
  52static const struct panel_config preset_dvi_640X480 = {
  53        .lcd_size       = PANEL_LCD_SIZE(640, 480),
  54        .timing_h       = DSS_HBP(48) | DSS_HFP(16) | DSS_HSW(96),
  55        .timing_v       = DSS_VBP(33) | DSS_VFP(10) | DSS_VSW(2),
  56        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
  57        .divisor        = 12 | (1 << 16),
  58        .data_lines     = LCD_INTERFACE_24_BIT,
  59        .panel_type     = ACTIVE_DISPLAY,
  60        .load_mode      = 2,
  61        .gfx_format     = GFXFORMAT_RGB16,
  62};
  63
  64static const struct panel_config preset_dvi_800X600 = {
  65        .lcd_size       = PANEL_LCD_SIZE(800, 600),
  66        .timing_h       = DSS_HBP(88) | DSS_HFP(40) | DSS_HSW(128),
  67        .timing_v       = DSS_VBP(23) | DSS_VFP(1) | DSS_VSW(4),
  68        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
  69        .divisor        = 8 | (1 << 16),
  70        .data_lines     = LCD_INTERFACE_24_BIT,
  71        .panel_type     = ACTIVE_DISPLAY,
  72        .load_mode      = 2,
  73        .gfx_format     = GFXFORMAT_RGB16,
  74};
  75
  76static const struct panel_config preset_dvi_1024X768 = {
  77        .lcd_size       = PANEL_LCD_SIZE(1024, 768),
  78        .timing_h       = DSS_HBP(160) | DSS_HFP(24) | DSS_HSW(136),
  79        .timing_v       = DSS_VBP(29) | DSS_VFP(3) | DSS_VSW(6),
  80        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
  81        .divisor        = 5 | (1 << 16),
  82        .data_lines     = LCD_INTERFACE_24_BIT,
  83        .panel_type     = ACTIVE_DISPLAY,
  84        .load_mode      = 2,
  85        .gfx_format     = GFXFORMAT_RGB16,
  86};
  87
  88static const struct panel_config preset_dvi_1152X864 = {
  89        .lcd_size       = PANEL_LCD_SIZE(1152, 864),
  90        .timing_h       = DSS_HBP(256) | DSS_HFP(64) | DSS_HSW(128),
  91        .timing_v       = DSS_VBP(32) | DSS_VFP(1) | DSS_VSW(3),
  92        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
  93        .divisor        = 4 | (1 << 16),
  94        .data_lines     = LCD_INTERFACE_24_BIT,
  95        .panel_type     = ACTIVE_DISPLAY,
  96        .load_mode      = 2,
  97        .gfx_format     = GFXFORMAT_RGB16,
  98};
  99
 100static const struct panel_config preset_dvi_1280X960 = {
 101        .lcd_size       = PANEL_LCD_SIZE(1280, 960),
 102        .timing_h       = DSS_HBP(312) | DSS_HFP(96) | DSS_HSW(112),
 103        .timing_v       = DSS_VBP(36) | DSS_VFP(1) | DSS_VSW(3),
 104        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
 105        .divisor        = 3 | (1 << 16),
 106        .data_lines     = LCD_INTERFACE_24_BIT,
 107        .panel_type     = ACTIVE_DISPLAY,
 108        .load_mode      = 2,
 109        .gfx_format     = GFXFORMAT_RGB16,
 110};
 111
 112static const struct panel_config preset_dvi_1280X1024 = {
 113        .lcd_size       = PANEL_LCD_SIZE(1280, 1024),
 114        .timing_h       = DSS_HBP(248) | DSS_HFP(48) | DSS_HSW(112),
 115        .timing_v       = DSS_VBP(38) | DSS_VFP(1) | DSS_VSW(3),
 116        .pol_freq       = DSS_IHS | DSS_IVS | DSS_IPC,
 117        .divisor        = 3 | (1 << 16),
 118        .data_lines     = LCD_INTERFACE_24_BIT,
 119        .panel_type     = ACTIVE_DISPLAY,
 120        .load_mode      = 2,
 121        .gfx_format     = GFXFORMAT_RGB16,
 122};
 123
 124static const struct panel_config preset_dataimage_480X800 = {
 125        .lcd_size       = PANEL_LCD_SIZE(480, 800),
 126        .timing_h       = DSS_HBP(2) | DSS_HFP(2) | DSS_HSW(2),
 127        .timing_v       = DSS_VBP(17) | DSS_VFP(20) | DSS_VSW(3),
 128        .pol_freq       = DSS_IVS | DSS_IHS | DSS_IPC | DSS_ONOFF,
 129        .divisor        = 10 | (1 << 10),
 130        .data_lines     = LCD_INTERFACE_18_BIT,
 131        .panel_type     = ACTIVE_DISPLAY,
 132        .load_mode      = 2,
 133        .gfx_format     = GFXFORMAT_RGB16,
 134};
 135
 136/*
 137 * set_resolution_params()
 138 *
 139 * Due to usage of multiple display related APIs resolution data is located in
 140 * more than one place. This function updates them all.
 141 */
 142static void set_resolution_params(int x, int y)
 143{
 144        panel_cfg.lcd_size = PANEL_LCD_SIZE(x, y);
 145        panel_info.vl_col = x;
 146        panel_info.vl_row = y;
 147        lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 148}
 149
 150static void set_preset(const struct panel_config preset, int x_res, int y_res)
 151{
 152        panel_cfg = preset;
 153        set_resolution_params(x_res, y_res);
 154}
 155
 156static enum display_type set_dvi_preset(const struct panel_config preset,
 157                                        int x_res, int y_res)
 158{
 159        set_preset(preset, x_res, y_res);
 160        return DVI;
 161}
 162
 163static enum display_type set_dataimage_preset(const struct panel_config preset,
 164                int x_res, int y_res)
 165{
 166        set_preset(preset, x_res, y_res);
 167        return DATA_IMAGE;
 168}
 169
 170/*
 171 * parse_mode() - parse the mode parameter of custom lcd settings
 172 *
 173 * @mode:       <res_x>x<res_y>
 174 *
 175 * Returns -1 on error, 0 on success.
 176 */
 177static int parse_mode(const char *mode)
 178{
 179        unsigned int modelen = strlen(mode);
 180        int res_specified = 0;
 181        unsigned int xres = 0, yres = 0;
 182        int yres_specified = 0;
 183        int i;
 184
 185        for (i = modelen - 1; i >= 0; i--) {
 186                switch (mode[i]) {
 187                case 'x':
 188                        if (!yres_specified) {
 189                                yres = simple_strtoul(&mode[i + 1], NULL, 0);
 190                                yres_specified = 1;
 191                        } else {
 192                                goto done_parsing;
 193                        }
 194
 195                        break;
 196                case '0' ... '9':
 197                        break;
 198                default:
 199                        goto done_parsing;
 200                }
 201        }
 202
 203        if (i < 0 && yres_specified) {
 204                xres = simple_strtoul(mode, NULL, 0);
 205                res_specified = 1;
 206        }
 207
 208done_parsing:
 209        if (res_specified) {
 210                set_resolution_params(xres, yres);
 211        } else {
 212                printf("LCD: invalid mode: %s\n", mode);
 213                return -1;
 214        }
 215
 216        return 0;
 217}
 218
 219#define PIXEL_CLK_NUMERATOR (26 * 432 / 39)
 220/*
 221 * parse_pixclock() - Parse the pixclock parameter of custom lcd settings
 222 *
 223 * @pixclock:   the desired pixel clock
 224 *
 225 * Returns -1 on error, 0 on success.
 226 *
 227 * Handling the pixel_clock:
 228 *
 229 * Pixel clock is defined in the OMAP35x TRM as follows:
 230 * pixel_clock =
 231 * (SYS_CLK * 2 * PRCM.CM_CLKSEL2_PLL[18:8]) /
 232 * (DSS.DISPC_DIVISOR[23:16] * DSS.DISPC_DIVISOR[6:0] *
 233 * PRCM.CM_CLKSEL_DSS[4:0] * (PRCM.CM_CLKSEL2_PLL[6:0] + 1))
 234 *
 235 * In practice, this means that in order to set the
 236 * divisor for the desired pixel clock one needs to
 237 * solve the following equation:
 238 *
 239 * 26 * 432 / (39 * <pixel_clock>) = DSS.DISPC_DIVISOR[6:0]
 240 *
 241 * NOTE: the explicit equation above is reduced. Do not
 242 * try to infer anything from these numbers.
 243 */
 244static int parse_pixclock(char *pixclock)
 245{
 246        int divisor, pixclock_val;
 247        char *pixclk_start = pixclock;
 248
 249        pixclock_val = simple_strtoul(pixclock, &pixclock, 10);
 250        divisor = DIV_ROUND_UP(PIXEL_CLK_NUMERATOR, pixclock_val);
 251        /* 0 and 1 are illegal values for PCD */
 252        if (divisor <= 1)
 253                divisor = 2;
 254
 255        panel_cfg.divisor = divisor | (1 << 16);
 256        if (pixclock[0] != '\0') {
 257                printf("LCD: invalid value for pixclock:%s\n", pixclk_start);
 258                return -1;
 259        }
 260
 261        return 0;
 262}
 263
 264/*
 265 * parse_setting() - parse a single setting of custom lcd parameters
 266 *
 267 * @setting:    The custom lcd setting <name>:<value>
 268 *
 269 * Returns -1 on failure, 0 on success.
 270 */
 271static int parse_setting(char *setting)
 272{
 273        int num_val;
 274        char *setting_start = setting;
 275
 276        if (!strncmp(setting, "mode:", 5)) {
 277                return parse_mode(setting + 5);
 278        } else if (!strncmp(setting, "pixclock:", 9)) {
 279                return parse_pixclock(setting + 9);
 280        } else if (!strncmp(setting, "left:", 5)) {
 281                num_val = simple_strtoul(setting + 5, &setting, 0);
 282                panel_cfg.timing_h |= DSS_HBP(num_val);
 283        } else if (!strncmp(setting, "right:", 6)) {
 284                num_val = simple_strtoul(setting + 6, &setting, 0);
 285                panel_cfg.timing_h |= DSS_HFP(num_val);
 286        } else if (!strncmp(setting, "upper:", 6)) {
 287                num_val = simple_strtoul(setting + 6, &setting, 0);
 288                panel_cfg.timing_v |= DSS_VBP(num_val);
 289        } else if (!strncmp(setting, "lower:", 6)) {
 290                num_val = simple_strtoul(setting + 6, &setting, 0);
 291                panel_cfg.timing_v |= DSS_VFP(num_val);
 292        } else if (!strncmp(setting, "hsynclen:", 9)) {
 293                num_val = simple_strtoul(setting + 9, &setting, 0);
 294                panel_cfg.timing_h |= DSS_HSW(num_val);
 295        } else if (!strncmp(setting, "vsynclen:", 9)) {
 296                num_val = simple_strtoul(setting + 9, &setting, 0);
 297                panel_cfg.timing_v |= DSS_VSW(num_val);
 298        } else if (!strncmp(setting, "hsync:", 6)) {
 299                if (simple_strtoul(setting + 6, &setting, 0) == 0)
 300                        panel_cfg.pol_freq |= DSS_IHS;
 301                else
 302                        panel_cfg.pol_freq &= ~DSS_IHS;
 303        } else if (!strncmp(setting, "vsync:", 6)) {
 304                if (simple_strtoul(setting + 6, &setting, 0) == 0)
 305                        panel_cfg.pol_freq |= DSS_IVS;
 306                else
 307                        panel_cfg.pol_freq &= ~DSS_IVS;
 308        } else if (!strncmp(setting, "outputen:", 9)) {
 309                if (simple_strtoul(setting + 9, &setting, 0) == 0)
 310                        panel_cfg.pol_freq |= DSS_IEO;
 311                else
 312                        panel_cfg.pol_freq &= ~DSS_IEO;
 313        } else if (!strncmp(setting, "pixclockpol:", 12)) {
 314                if (simple_strtoul(setting + 12, &setting, 0) == 0)
 315                        panel_cfg.pol_freq |= DSS_IPC;
 316                else
 317                        panel_cfg.pol_freq &= ~DSS_IPC;
 318        } else if (!strncmp(setting, "active", 6)) {
 319                panel_cfg.panel_type = ACTIVE_DISPLAY;
 320                return 0; /* Avoid sanity check below */
 321        } else if (!strncmp(setting, "passive", 7)) {
 322                panel_cfg.panel_type = PASSIVE_DISPLAY;
 323                return 0; /* Avoid sanity check below */
 324        } else if (!strncmp(setting, "display:", 8)) {
 325                if (!strncmp(setting + 8, "dvi", 3)) {
 326                        lcd_def = DVI_CUSTOM;
 327                        return 0; /* Avoid sanity check below */
 328                }
 329        } else {
 330                printf("LCD: unknown option %s\n", setting_start);
 331                return -1;
 332        }
 333
 334        if (setting[0] != '\0') {
 335                printf("LCD: invalid value for %s\n", setting_start);
 336                return -1;
 337        }
 338
 339        return 0;
 340}
 341
 342/*
 343 * env_parse_customlcd() - parse custom lcd params from an environment variable.
 344 *
 345 * @custom_lcd_params:  The environment variable containing the lcd params.
 346 *
 347 * Returns -1 on failure, 0 on success.
 348 */
 349static int parse_customlcd(char *custom_lcd_params)
 350{
 351        char params_cpy[160];
 352        char *setting;
 353
 354        strncpy(params_cpy, custom_lcd_params, 160);
 355        setting = strtok(params_cpy, ",");
 356        while (setting) {
 357                if (parse_setting(setting) < 0)
 358                        return -1;
 359
 360                setting = strtok(NULL, ",");
 361        }
 362
 363        /* Currently we don't support changing this via custom lcd params */
 364        panel_cfg.data_lines = LCD_INTERFACE_24_BIT;
 365        panel_cfg.gfx_format = GFXFORMAT_RGB16; /* See dvi predefines note */
 366
 367        return 0;
 368}
 369
 370/*
 371 * env_parse_displaytype() - parse display type.
 372 *
 373 * Parses the environment variable "displaytype", which contains the
 374 * name of the display type or preset, in which case it applies its
 375 * configurations.
 376 *
 377 * Returns the type of display that was specified.
 378 */
 379static enum display_type env_parse_displaytype(char *displaytype)
 380{
 381        if (!strncmp(displaytype, "dvi640x480", 10))
 382                return set_dvi_preset(preset_dvi_640X480, 640, 480);
 383        else if (!strncmp(displaytype, "dvi800x600", 10))
 384                return set_dvi_preset(preset_dvi_800X600, 800, 600);
 385        else if (!strncmp(displaytype, "dvi1024x768", 11))
 386                return set_dvi_preset(preset_dvi_1024X768, 1024, 768);
 387        else if (!strncmp(displaytype, "dvi1152x864", 11))
 388                return set_dvi_preset(preset_dvi_1152X864, 1152, 864);
 389        else if (!strncmp(displaytype, "dvi1280x960", 11))
 390                return set_dvi_preset(preset_dvi_1280X960, 1280, 960);
 391        else if (!strncmp(displaytype, "dvi1280x1024", 12))
 392                return set_dvi_preset(preset_dvi_1280X1024, 1280, 1024);
 393        else if (!strncmp(displaytype, "dataimage480x800", 16))
 394                return set_dataimage_preset(preset_dataimage_480X800, 480, 800);
 395
 396        return NONE;
 397}
 398
 399void lcd_ctrl_init(void *lcdbase)
 400{
 401        struct prcm *prcm = (struct prcm *)PRCM_BASE;
 402        char *custom_lcd;
 403        char *displaytype = getenv("displaytype");
 404
 405        if (displaytype == NULL)
 406                return;
 407
 408        lcd_def = env_parse_displaytype(displaytype);
 409        /* If we did not recognize the preset, check if it's an env variable */
 410        if (lcd_def == NONE) {
 411                custom_lcd = getenv(displaytype);
 412                if (custom_lcd == NULL || parse_customlcd(custom_lcd) < 0)
 413                        return;
 414        }
 415
 416        panel_cfg.frame_buffer = lcdbase;
 417        omap3_dss_panel_config(&panel_cfg);
 418        /*
 419         * Pixel clock is defined with many divisions and only few
 420         * multiplications of the system clock. Since DSS FCLK divisor is set
 421         * to 16 by default, we need to set it to a smaller value, like 3
 422         * (chosen via trial and error).
 423         */
 424        clrsetbits_le32(&prcm->clksel_dss, 0xF, 3);
 425}
 426
 427#ifdef CONFIG_SCF0403_LCD
 428static void scf0403_enable(void)
 429{
 430        gpio_direction_output(58, 1);
 431        scf0403_init(157);
 432}
 433#else
 434static inline void scf0403_enable(void) {}
 435#endif
 436
 437void lcd_enable(void)
 438{
 439        switch (lcd_def) {
 440        case NONE:
 441                return;
 442        case DVI:
 443        case DVI_CUSTOM:
 444                gpio_direction_output(54, 0); /* Turn on DVI */
 445                break;
 446        case DATA_IMAGE:
 447                scf0403_enable();
 448                break;
 449        }
 450
 451        omap3_dss_enable();
 452}
 453
 454void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) {}
 455