board/karo/tx28/tx28.c

   1 /*
   2  * Copyright (C) 2011 Lothar Waßmann <LW@KARO-electronics.de>
   3  * based on: board/freesclae/mx28_evk.c (C) 2010 Freescale Semiconductor, Inc.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <errno.h>
  26 #include <libfdt.h>
  27 #include <fdt_support.h>
  28 #include <lcd.h>
  29 #include <netdev.h>
  30 #include <mmc.h>
  31 #include <imx_ssp_mmc.h>
  32 #include <linux/list.h>
  33 #include <linux/fb.h>
  34 #include <asm/io.h>
  35 #include <asm/gpio.h>
  36 #include <asm/arch/iomux-mx28.h>
  37 #include <asm/arch/clock.h>
  38 #include <asm/arch/mxsfb.h>
  39 #include <asm/arch/imx-regs.h>
  40 #include <asm/arch/sys_proto.h>
  41
  42 #include "../common/karo.h"
  43
  44 DECLARE_GLOBAL_DATA_PTR;
  45
  46 #define MXS_GPIO_NR(p, o)      (((p) << 5) | (o))
  47
  48 #define TX28_LCD_PWR_GPIO       MX28_PAD_LCD_ENABLE__GPIO_1_31
  49 #define TX28_LCD_RST_GPIO       MX28_PAD_LCD_RESET__GPIO_3_30
  50 #define TX28_LCD_BACKLIGHT_GPIO MX28_PAD_PWM0__GPIO_3_16
  51
  52 #define TX28_USBH_VBUSEN_GPIO   MX28_PAD_SPDIF__GPIO_3_27
  53 #define TX28_USBH_OC_GPIO       MX28_PAD_JTAG_RTCK__GPIO_4_20
  54 #define TX28_USBOTG_VBUSEN_GPIO MX28_PAD_GPMI_CE2N__GPIO_0_18
  55 #define TX28_USBOTG_OC_GPIO     MX28_PAD_GPMI_CE3N__GPIO_0_19
  56 #define TX28_USBOTG_ID_GPIO     MX28_PAD_PWM2__GPIO_3_18
  57
  58 #define TX28_LED_GPIO           MX28_PAD_ENET0_RXD3__GPIO_4_10
  59
  60 static const struct gpio tx28_gpios[] = {
  61         { TX28_USBH_VBUSEN_GPIO, GPIOF_OUTPUT_INIT_LOW, "USBH VBUSEN", },
  62         { TX28_USBH_OC_GPIO, GPIOF_INPUT, "USBH OC", },
  63         { TX28_USBOTG_VBUSEN_GPIO, GPIOF_OUTPUT_INIT_LOW, "USBOTG VBUSEN", },
  64         { TX28_USBOTG_OC_GPIO, GPIOF_INPUT, "USBOTG OC", },
  65         { TX28_USBOTG_ID_GPIO, GPIOF_INPUT, "USBOTG ID", },
  66 };
  67
  68 static const iomux_cfg_t tx28_pads[] = {
  69         /* UART pads */
  70 #if CONFIG_CONS_INDEX == 0
  71         MX28_PAD_AUART0_RX__DUART_CTS,
  72         MX28_PAD_AUART0_TX__DUART_RTS,
  73         MX28_PAD_AUART0_CTS__DUART_RX,
  74         MX28_PAD_AUART0_RTS__DUART_TX,
  75 #elif CONFIG_CONS_INDEX == 1
  76         MX28_PAD_AUART1_RX__AUART1_RX,
  77         MX28_PAD_AUART1_TX__AUART1_TX,
  78         MX28_PAD_AUART1_CTS__AUART1_CTS,
  79         MX28_PAD_AUART1_RTS__AUART1_RTS,
  80 #elif CONFIG_CONS_INDEX == 2
  81         MX28_PAD_AUART3_RX__AUART3_RX,
  82         MX28_PAD_AUART3_TX__AUART3_TX,
  83         MX28_PAD_AUART3_CTS__AUART3_CTS,
  84         MX28_PAD_AUART3_RTS__AUART3_RTS,
  85 #endif
  86         /* I2C bus for internal DS1339, PCA9554 and on DIMM pins 40/41 */
  87         MX28_PAD_I2C0_SCL__I2C0_SCL,
  88         MX28_PAD_I2C0_SDA__I2C0_SDA,
  89
  90         /* USBH VBUSEN, OC */
  91         MX28_PAD_SPDIF__GPIO_3_27,
  92         MX28_PAD_JTAG_RTCK__GPIO_4_20,
  93
  94         /* USBOTG VBUSEN, OC, ID */
  95         MX28_PAD_GPMI_CE2N__GPIO_0_18,
  96         MX28_PAD_GPMI_CE3N__GPIO_0_19,
  97         MX28_PAD_PWM2__GPIO_3_18,
  98 };
  99
 100 /*
 101  * Functions
 102  */
 103
 104 /* provide at least _some_ sort of randomness */
 105 #define MAX_LOOPS       100
 106
 107 static u32 random;
 108
 109 static inline void random_init(void)
 110 {
 111         struct mxs_digctl_regs *digctl_regs = (void *)MXS_DIGCTL_BASE;
 112         u32 seed = 0;
 113         int i;
 114
 115         for (i = 0; i < MAX_LOOPS; i++) {
 116                 unsigned int usec = readl(&digctl_regs->hw_digctl_microseconds);
 117
 118                 seed = get_timer(usec + random + seed);
 119                 srand(seed);
 120                 random = rand();
 121         }
 122 }
 123
 124 int board_early_init_f(void)
 125 {
 126         random_init();
 127
 128         /* IO0 clock at 480MHz */
 129         mx28_set_ioclk(MXC_IOCLK0, 480000);
 130         /* IO1 clock at 480MHz */
 131         mx28_set_ioclk(MXC_IOCLK1, 480000);
 132
 133         /* SSP0 clock at 96MHz */
 134         mx28_set_sspclk(MXC_SSPCLK0, 96000, 0);
 135         /* SSP2 clock at 96MHz */
 136         mx28_set_sspclk(MXC_SSPCLK2, 96000, 0);
 137
 138         gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios));
 139         mxs_iomux_setup_multiple_pads(tx28_pads, ARRAY_SIZE(tx28_pads));
 140         return 0;
 141 }
 142
 143 int board_init(void)
 144 {
 145         /* Address of boot parameters */
 146 #ifdef CONFIG_OF_LIBFDT
 147         gd->bd->bi_arch_number = -1;
 148 #endif
 149         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x1000;
 150         return 0;
 151 }
 152
 153 int dram_init(void)
 154 {
 155         return mxs_dram_init();
 156 }
 157
 158 #ifdef  CONFIG_CMD_MMC
 159 static int tx28_mmc_wp(int dev_no)
 160 {
 161         return 0;
 162 }
 163
 164 int board_mmc_init(bd_t *bis)
 165 {
 166         return mxsmmc_initialize(bis, 0, tx28_mmc_wp);
 167 }
 168 #endif /* CONFIG_CMD_MMC */
 169
 170 #ifdef CONFIG_FEC_MXC
 171 #ifdef CONFIG_GET_FEC_MAC_ADDR_FROM_IIM
 172
 173 #ifdef CONFIG_FEC_MXC_MULTI
 174 #define FEC_MAX_IDX                     1
 175 #else
 176 #define FEC_MAX_IDX                     0
 177 #endif
 178
 179 static int fec_get_mac_addr(int index)
 180 {
 181         u32 val1, val2;
 182         int timeout = 1000;
 183         struct mxs_ocotp_regs *ocotp_regs =
 184                 (struct mxs_ocotp_regs *)MXS_OCOTP_BASE;
 185         u32 *cust = &ocotp_regs->hw_ocotp_cust0;
 186         char mac[6 * 3];
 187         char env_name[] = "eth.addr";
 188
 189         if (index < 0 || index > FEC_MAX_IDX)
 190                 return -EINVAL;
 191
 192         /* set this bit to open the OTP banks for reading */
 193         writel(OCOTP_CTRL_RD_BANK_OPEN,
 194                 &ocotp_regs->hw_ocotp_ctrl_set);
 195
 196         /* wait until OTP contents are readable */
 197         while (OCOTP_CTRL_BUSY & readl(&ocotp_regs->hw_ocotp_ctrl)) {
 198                 if (timeout-- < 0)
 199                         return -ETIMEDOUT;
 200                 udelay(100);
 201         }
 202
 203         val1 = readl(&cust[index * 8]);
 204         val2 = readl(&cust[index * 8 + 4]);
 205         if ((val1 | val2) == 0)
 206                 return 0;
 207         snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
 208                 (val1 >> 24) & 0xFF, (val1 >> 16) & 0xFF,
 209                 (val1 >> 8) & 0xFF, (val1 >> 0) & 0xFF,
 210                 (val2 >> 24) & 0xFF, (val2 >> 16) & 0xFF);
 211         if (index == 0)
 212                 snprintf(env_name, sizeof(env_name), "ethaddr");
 213         else
 214                 snprintf(env_name, sizeof(env_name), "eth%daddr", index);
 215
 216         setenv(env_name, mac);
 217         return 0;
 218 }
 219 #endif /* CONFIG_GET_FEC_MAC_ADDR_FROM_IIM */
 220
 221 static const iomux_cfg_t tx28_fec_pads[] = {
 222         MX28_PAD_ENET0_RX_EN__ENET0_RX_EN,
 223         MX28_PAD_ENET0_RXD0__ENET0_RXD0,
 224         MX28_PAD_ENET0_RXD1__ENET0_RXD1,
 225 };
 226
 227 int board_eth_init(bd_t *bis)
 228 {
 229         int ret;
 230
 231         /* Reset the external phy */
 232         gpio_direction_output(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 0);
 233
 234         /* Power on the external phy */
 235         gpio_direction_output(MX28_PAD_PWM4__GPIO_3_29, 1);
 236
 237         /* Pull strap pins to high */
 238         gpio_direction_output(MX28_PAD_ENET0_RX_EN__GPIO_4_2, 1);
 239         gpio_direction_output(MX28_PAD_ENET0_RXD0__GPIO_4_3, 1);
 240         gpio_direction_output(MX28_PAD_ENET0_RXD1__GPIO_4_4, 1);
 241         gpio_direction_input(MX28_PAD_ENET0_TX_CLK__GPIO_4_5);
 242
 243         udelay(25000);
 244         gpio_set_value(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 1);
 245         udelay(100);
 246
 247         mxs_iomux_setup_multiple_pads(tx28_fec_pads, ARRAY_SIZE(tx28_fec_pads));
 248
 249         ret = cpu_eth_init(bis);
 250         if (ret) {
 251                 printf("cpu_eth_init() failed: %d\n", ret);
 252                 return ret;
 253         }
 254
 255         ret = fec_get_mac_addr(0);
 256         if (ret < 0) {
 257                 printf("Failed to read FEC0 MAC address from OCOTP\n");
 258                 return ret;
 259         }
 260 #ifdef CONFIG_FEC_MXC_MULTI
 261         if (getenv("ethaddr")) {
 262                 ret = fecmxc_initialize_multi(bis, 0, 0, MXS_ENET0_BASE);
 263                 if (ret) {
 264                         printf("FEC MXS: Unable to init FEC0\n");
 265                         return ret;
 266                 }
 267         }
 268
 269         ret = fec_get_mac_addr(1);
 270         if (ret < 0) {
 271                 printf("Failed to read FEC1 MAC address from OCOTP\n");
 272                 return ret;
 273         }
 274         if (getenv("eth1addr")) {
 275                 ret = fecmxc_initialize_multi(bis, 1, 1, MXS_ENET1_BASE);
 276                 if (ret) {
 277                         printf("FEC MXS: Unable to init FEC1\n");
 278                         return ret;
 279                 }
 280         }
 281         return 0;
 282 #else
 283         if (getenv("ethaddr")) {
 284                 ret = fecmxc_initialize(bis);
 285         }
 286         return ret;
 287 #endif
 288 }
 289 #endif /* CONFIG_FEC_MXC */
 290
 291 enum {
 292         LED_STATE_INIT = -1,
 293         LED_STATE_OFF,
 294         LED_STATE_ON,
 295 };
 296
 297 void show_activity(int arg)
 298 {
 299         static int led_state = LED_STATE_INIT;
 300         static ulong last;
 301
 302         if (led_state == LED_STATE_INIT) {
 303                 last = get_timer(0);
 304                 gpio_set_value(TX28_LED_GPIO, 1);
 305                 led_state = LED_STATE_ON;
 306         } else {
 307                 if (get_timer(last) > CONFIG_SYS_HZ) {
 308                         last = get_timer(0);
 309                         if (led_state == LED_STATE_ON) {
 310                                 gpio_set_value(TX28_LED_GPIO, 0);
 311                         } else {
 312                                 gpio_set_value(TX28_LED_GPIO, 1);
 313                         }
 314                         led_state = 1 - led_state;
 315                 }
 316         }
 317 }
 318
 319 static const iomux_cfg_t stk5_pads[] = {
 320         /* SW controlled LED on STK5 baseboard */
 321         MX28_PAD_ENET0_RXD3__GPIO_4_10,
 322 };
 323
 324 static const struct gpio stk5_gpios[] = {
 325 };
 326
 327 #ifdef CONFIG_LCD
 328 static struct fb_videomode tx28_fb_modes[] = {
 329         {
 330                 /* Standard VGA timing */
 331                 .name           = "VGA",
 332                 .refresh        = 60,
 333                 .xres           = 640,
 334                 .yres           = 480,
 335                 .pixclock       = KHZ2PICOS(25175),
 336                 .left_margin    = 48,
 337                 .hsync_len      = 96,
 338                 .right_margin   = 16,
 339                 .upper_margin   = 31,
 340                 .vsync_len      = 2,
 341                 .lower_margin   = 12,
 342                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 343                 .vmode          = FB_VMODE_NONINTERLACED,
 344         },
 345         {
 346                 /* Emerging ETV570 640 x 480 display. Syncs low active,
 347                  * DE high active, 115.2 mm x 86.4 mm display area
 348                  * VGA compatible timing
 349                  */
 350                 .name           = "ETV570",
 351                 .refresh        = 60,
 352                 .xres           = 640,
 353                 .yres           = 480,
 354                 .pixclock       = KHZ2PICOS(25175),
 355                 .left_margin    = 114,
 356                 .hsync_len      = 30,
 357                 .right_margin   = 16,
 358                 .upper_margin   = 32,
 359                 .vsync_len      = 3,
 360                 .lower_margin   = 10,
 361                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 362                 .vmode          = FB_VMODE_NONINTERLACED,
 363         },
 364         {
 365                 /* Emerging ET0350G0DH6 320 x 240 display.
 366                  * 70.08 mm x 52.56 mm display area.
 367                  */
 368                 .name           = "ET0350",
 369                 .refresh        = 60,
 370                 .xres           = 320,
 371                 .yres           = 240,
 372                 .pixclock       = KHZ2PICOS(6500),
 373                 .left_margin    = 68 - 34,
 374                 .hsync_len      = 34,
 375                 .right_margin   = 20,
 376                 .upper_margin   = 18 - 3,
 377                 .vsync_len      = 3,
 378                 .lower_margin   = 4,
 379                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 380                 .vmode          = FB_VMODE_NONINTERLACED,
 381         },
 382         {
 383                 /* Emerging ET0430G0DH6 480 x 272 display.
 384                  * 95.04 mm x 53.856 mm display area.
 385                  */
 386                 .name           = "ET0430",
 387                 .refresh        = 60,
 388                 .xres           = 480,
 389                 .yres           = 272,
 390                 .pixclock       = KHZ2PICOS(9000),
 391                 .left_margin    = 2,
 392                 .hsync_len      = 41,
 393                 .right_margin   = 2,
 394                 .upper_margin   = 2,
 395                 .vsync_len      = 10,
 396                 .lower_margin   = 2,
 397                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 398                 .vmode          = FB_VMODE_NONINTERLACED,
 399         },
 400         {
 401                 /* Emerging ET0500G0DH6 800 x 480 display.
 402                  * 109.6 mm x 66.4 mm display area.
 403                  */
 404                 .name           = "ET0500",
 405                 .refresh        = 60,
 406                 .xres           = 800,
 407                 .yres           = 480,
 408                 .pixclock       = KHZ2PICOS(33260),
 409                 .left_margin    = 216 - 128,
 410                 .hsync_len      = 128,
 411                 .right_margin   = 1056 - 800 - 216,
 412                 .upper_margin   = 35 - 2,
 413                 .vsync_len      = 2,
 414                 .lower_margin   = 525 - 480 - 35,
 415                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 416                 .vmode          = FB_VMODE_NONINTERLACED,
 417         },
 418         {
 419                 /* Emerging ETQ570G0DH6 320 x 240 display.
 420                  * 115.2 mm x 86.4 mm display area.
 421                  */
 422                 .name           = "ETQ570",
 423                 .refresh        = 60,
 424                 .xres           = 320,
 425                 .yres           = 240,
 426                 .pixclock       = KHZ2PICOS(6400),
 427                 .left_margin    = 38,
 428                 .hsync_len      = 30,
 429                 .right_margin   = 30,
 430                 .upper_margin   = 16, /* 15 according to datasheet */
 431                 .vsync_len      = 3, /* TVP -> 1>x>5 */
 432                 .lower_margin   = 4, /* 4.5 according to datasheet */
 433                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 434                 .vmode          = FB_VMODE_NONINTERLACED,
 435         },
 436         {
 437                 /* Emerging ET0700G0DH6 800 x 480 display.
 438                  * 152.4 mm x 91.44 mm display area.
 439                  */
 440                 .name           = "ET0700",
 441                 .refresh        = 60,
 442                 .xres           = 800,
 443                 .yres           = 480,
 444                 .pixclock       = KHZ2PICOS(33260),
 445                 .left_margin    = 216 - 128,
 446                 .hsync_len      = 128,
 447                 .right_margin   = 1056 - 800 - 216,
 448                 .upper_margin   = 35 - 2,
 449                 .vsync_len      = 2,
 450                 .lower_margin   = 525 - 480 - 35,
 451                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 452                 .vmode          = FB_VMODE_NONINTERLACED,
 453         },
 454         {
 455                 /* unnamed entry for assigning parameters parsed from 'video_mode' string */
 456                 .sync           = FB_SYNC_DATA_ENABLE_HIGH_ACT,
 457                 .vmode          = FB_VMODE_NONINTERLACED,
 458         },
 459 };
 460
 461 static int lcd_enabled = 1;
 462
 463 void lcd_enable(void)
 464 {
 465         /* HACK ALERT:
 466          * global variable from common/lcd.c
 467          * Set to 0 here to prevent messages from going to LCD
 468          * rather than serial console
 469          */
 470         lcd_is_enabled = 0;
 471
 472         karo_load_splashimage(1);
 473         if (lcd_enabled) {
 474                 debug("Switching LCD on\n");
 475                 gpio_set_value(TX28_LCD_PWR_GPIO, 1);
 476                 udelay(100);
 477                 gpio_set_value(TX28_LCD_RST_GPIO, 1);
 478                 udelay(300000);
 479                 gpio_set_value(TX28_LCD_BACKLIGHT_GPIO, 0);
 480         }
 481 }
 482
 483 void lcd_disable(void)
 484 {
 485         mxsfb_disable();
 486 }
 487
 488 void lcd_panel_disable(void)
 489 {
 490         if (lcd_enabled) {
 491                 debug("Switching LCD off\n");
 492                 gpio_set_value(TX28_LCD_BACKLIGHT_GPIO, 1);
 493                 gpio_set_value(TX28_LCD_RST_GPIO, 0);
 494                 gpio_set_value(TX28_LCD_PWR_GPIO, 0);
 495         }
 496 }
 497
 498 static const iomux_cfg_t stk5_lcd_pads[] = {
 499         /* LCD RESET */
 500         MX28_PAD_LCD_RESET__GPIO_3_30 | MXS_PAD_CTRL,
 501         /* LCD POWER_ENABLE */
 502         MX28_PAD_LCD_ENABLE__GPIO_1_31 | MXS_PAD_CTRL,
 503         /* LCD Backlight (PWM) */
 504         MX28_PAD_PWM0__GPIO_3_16 | MXS_PAD_CTRL,
 505
 506         /* Display */
 507         MX28_PAD_LCD_D00__LCD_D0 | MXS_PAD_CTRL,
 508         MX28_PAD_LCD_D01__LCD_D1 | MXS_PAD_CTRL,
 509         MX28_PAD_LCD_D02__LCD_D2 | MXS_PAD_CTRL,
 510         MX28_PAD_LCD_D03__LCD_D3 | MXS_PAD_CTRL,
 511         MX28_PAD_LCD_D04__LCD_D4 | MXS_PAD_CTRL,
 512         MX28_PAD_LCD_D05__LCD_D5 | MXS_PAD_CTRL,
 513         MX28_PAD_LCD_D06__LCD_D6 | MXS_PAD_CTRL,
 514         MX28_PAD_LCD_D07__LCD_D7 | MXS_PAD_CTRL,
 515         MX28_PAD_LCD_D08__LCD_D8 | MXS_PAD_CTRL,
 516         MX28_PAD_LCD_D09__LCD_D9 | MXS_PAD_CTRL,
 517         MX28_PAD_LCD_D10__LCD_D10 | MXS_PAD_CTRL,
 518         MX28_PAD_LCD_D11__LCD_D11 | MXS_PAD_CTRL,
 519         MX28_PAD_LCD_D12__LCD_D12 | MXS_PAD_CTRL,
 520         MX28_PAD_LCD_D13__LCD_D13 | MXS_PAD_CTRL,
 521         MX28_PAD_LCD_D14__LCD_D14 | MXS_PAD_CTRL,
 522         MX28_PAD_LCD_D15__LCD_D15 | MXS_PAD_CTRL,
 523         MX28_PAD_LCD_D16__LCD_D16 | MXS_PAD_CTRL,
 524         MX28_PAD_LCD_D17__LCD_D17 | MXS_PAD_CTRL,
 525         MX28_PAD_LCD_D18__LCD_D18 | MXS_PAD_CTRL,
 526         MX28_PAD_LCD_D19__LCD_D19 | MXS_PAD_CTRL,
 527         MX28_PAD_LCD_D20__LCD_D20 | MXS_PAD_CTRL,
 528         MX28_PAD_LCD_D21__LCD_D21 | MXS_PAD_CTRL,
 529         MX28_PAD_LCD_D22__LCD_D22 | MXS_PAD_CTRL,
 530         MX28_PAD_LCD_D23__LCD_D23 | MXS_PAD_CTRL,
 531         MX28_PAD_LCD_RD_E__LCD_VSYNC | MXS_PAD_CTRL,
 532         MX28_PAD_LCD_WR_RWN__LCD_HSYNC | MXS_PAD_CTRL,
 533         MX28_PAD_LCD_RS__LCD_DOTCLK | MXS_PAD_CTRL,
 534         MX28_PAD_LCD_CS__LCD_CS | MXS_PAD_CTRL,
 535         MX28_PAD_LCD_VSYNC__LCD_VSYNC | MXS_PAD_CTRL,
 536         MX28_PAD_LCD_HSYNC__LCD_HSYNC | MXS_PAD_CTRL,
 537         MX28_PAD_LCD_DOTCLK__LCD_DOTCLK | MXS_PAD_CTRL,
 538 };
 539
 540 static const struct gpio stk5_lcd_gpios[] = {
 541         { TX28_LCD_RST_GPIO, GPIOF_OUTPUT_INIT_LOW, "LCD RESET", },
 542         { TX28_LCD_PWR_GPIO, GPIOF_OUTPUT_INIT_LOW, "LCD POWER", },
 543         { TX28_LCD_BACKLIGHT_GPIO, GPIOF_OUTPUT_INIT_HIGH, "LCD BACKLIGHT", },
 544 };
 545
 546 extern void video_hw_init(void *lcdbase);
 547
 548 void lcd_ctrl_init(void *lcdbase)
 549 {
 550         int color_depth = 24;
 551         char *vm;
 552         unsigned long val;
 553         int refresh = 60;
 554         struct fb_videomode *p = tx28_fb_modes;
 555         struct fb_videomode fb_mode;
 556         int xres_set = 0, yres_set = 0, bpp_set = 0, refresh_set = 0;
 557
 558         if (!lcd_enabled) {
 559                 debug("LCD disabled\n");
 560                 return;
 561         }
 562
 563         if (tstc()) {
 564                 debug("Disabling LCD\n");
 565                 lcd_enabled = 0;
 566                 return;
 567         }
 568
 569         karo_fdt_move_fdt();
 570
 571         vm = getenv("video_mode");
 572         if (vm == NULL) {
 573                 debug("Disabling LCD\n");
 574                 lcd_enabled = 0;
 575                 return;
 576         }
 577         if (karo_fdt_get_fb_mode(working_fdt, vm, &fb_mode) == 0) {
 578                 p = &fb_mode;
 579                 debug("Using video mode from FDT\n");
 580                 vm += strlen(vm);
 581         }
 582         if (p->name != NULL)
 583                 debug("Trying compiled-in video modes\n");
 584         while (p->name != NULL) {
 585                 if (strcmp(p->name, vm) == 0) {
 586                         debug("Using video mode: '%s'\n", p->name);
 587                         vm += strlen(vm);
 588                         break;
 589                 }
 590                 p++;
 591         }
 592         if (*vm != '\0')
 593                 debug("Trying to decode video_mode: '%s'\n", vm);
 594         while (*vm != '\0') {
 595                 if (*vm >= '0' && *vm <= '9') {
 596                         char *end;
 597
 598                         val = simple_strtoul(vm, &end, 0);
 599                         if (end > vm) {
 600                                 if (!xres_set) {
 601                                         if (val > panel_info.vl_col)
 602                                                 val = panel_info.vl_col;
 603                                         p->xres = val;
 604                                         xres_set = 1;
 605                                 } else if (!yres_set) {
 606                                         if (val > panel_info.vl_row)
 607                                                 val = panel_info.vl_row;
 608                                         p->yres = val;
 609                                         yres_set = 1;
 610                                 } else if (!bpp_set) {
 611                                         switch (val) {
 612                                         case 8:
 613                                         case 16:
 614                                         case 18:
 615                                         case 24:
 616                                                 color_depth = val;
 617                                                 break;
 618
 619                                         default:
 620                                                 printf("Invalid color depth: '%.*s' in video_mode; using default: '%u'\n",
 621                                                         end - vm, vm, color_depth);
 622                                         }
 623                                         bpp_set = 1;
 624                                 } else if (!refresh_set) {
 625                                         refresh = val;
 626                                         refresh_set = 1;
 627                                 }
 628                         }
 629                         vm = end;
 630                 }
 631                 switch (*vm) {
 632                 case '@':
 633                         bpp_set = 1;
 634                         /* fallthru */
 635                 case '-':
 636                         yres_set = 1;
 637                         /* fallthru */
 638                 case 'x':
 639                         xres_set = 1;
 640                         /* fallthru */
 641                 case 'M':
 642                 case 'R':
 643                         vm++;
 644                         break;
 645
 646                 default:
 647                         if (*vm != '\0')
 648                                 vm++;
 649                 }
 650         }
 651         if (p->xres == 0 || p->yres == 0) {
 652                 printf("Invalid video mode: %s\n", getenv("video_mode"));
 653                 lcd_enabled = 0;
 654                 printf("Supported video modes are:");
 655                 for (p = &tx28_fb_modes[0]; p->name != NULL; p++) {
 656                         printf(" %s", p->name);
 657                 }
 658                 printf("\n");
 659                 return;
 660         }
 661         p->pixclock = KHZ2PICOS(refresh *
 662                 (p->xres + p->left_margin + p->right_margin + p->hsync_len) *
 663                 (p->yres + p->upper_margin + p->lower_margin + p->vsync_len) /
 664                                 1000);
 665         debug("Pixel clock set to %lu.%03lu MHz\n",
 666                 PICOS2KHZ(p->pixclock) / 1000, PICOS2KHZ(p->pixclock) % 1000);
 667
 668         gpio_request_array(stk5_lcd_gpios, ARRAY_SIZE(stk5_lcd_gpios));
 669         mxs_iomux_setup_multiple_pads(stk5_lcd_pads,
 670                                 ARRAY_SIZE(stk5_lcd_pads));
 671
 672         debug("video format: %ux%u-%u@%u\n", p->xres, p->yres,
 673                 color_depth, refresh);
 674
 675         if (karo_load_splashimage(0) == 0) {
 676                 debug("Initializing LCD controller\n");
 677                 mxsfb_init(p, PIX_FMT_RGB24, color_depth);
 678                 video_hw_init(lcdbase);
 679         } else {
 680                 debug("Skipping initialization of LCD controller\n");
 681         }
 682 }
 683 #else
 684 #define lcd_enabled 0
 685 #endif /* CONFIG_LCD */
 686
 687 static void stk5_board_init(void)
 688 {
 689         gpio_request_array(stk5_gpios, ARRAY_SIZE(stk5_gpios));
 690         mxs_iomux_setup_multiple_pads(stk5_pads, ARRAY_SIZE(stk5_pads));
 691 }
 692
 693 static void stk5v3_board_init(void)
 694 {
 695         stk5_board_init();
 696 }
 697
 698 static void stk5v5_board_init(void)
 699 {
 700         stk5_board_init();
 701
 702         /* init flexcan transceiver enable GPIO */
 703         gpio_request_one(MXS_GPIO_NR(0, 1), GPIOF_OUTPUT_INIT_HIGH,
 704                         "Flexcan Transceiver");
 705         mxs_iomux_setup_pad(MX28_PAD_LCD_D00__GPIO_1_0);
 706 }
 707
 708 int board_late_init(void)
 709 {
 710         const char *baseboard;
 711
 712         karo_fdt_move_fdt();
 713
 714         baseboard = getenv("baseboard");
 715         if (!baseboard)
 716                 return 0;
 717
 718         if (strncmp(baseboard, "stk5", 4) == 0) {
 719                 printf("Baseboard: %s\n", baseboard);
 720                 if ((strlen(baseboard) == 4) ||
 721                         strcmp(baseboard, "stk5-v3") == 0) {
 722                         stk5v3_board_init();
 723                 } else if (strcmp(baseboard, "stk5-v5") == 0) {
 724                         const char *otg_mode = getenv("otg_mode");
 725
 726                         if (otg_mode && strcmp(otg_mode, "host") == 0) {
 727                                 printf("otg_mode='%s' is incompatible with baseboard %s; setting to 'none'\n",
 728                                         otg_mode, baseboard);
 729                                 setenv("otg_mode", "none");
 730                         }
 731                         stk5v5_board_init();
 732                 } else {
 733                         printf("WARNING: Unsupported STK5 board rev.: %s\n",
 734                                 baseboard + 4);
 735                 }
 736         } else {
 737                 printf("WARNING: Unsupported baseboard: '%s'\n",
 738                         baseboard);
 739                 return -EINVAL;
 740         }
 741
 742         return 0;
 743 }
 744
 745 int checkboard(void)
 746 {
 747         printf("Board: Ka-Ro TX28-4%sxx\n", TX28_MOD_SUFFIX);
 748         return 0;
 749 }
 750
 751 #if defined(CONFIG_OF_BOARD_SETUP)
 752 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
 753 #include <jffs2/jffs2.h>
 754 #include <mtd_node.h>
 755 struct node_info tx28_nand_nodes[] = {
 756         { "gpmi-nand", MTD_DEV_TYPE_NAND, },
 757 };
 758 #else
 759 #define fdt_fixup_mtdparts(b,n,c) do { } while (0)
 760 #endif
 761
 762 static void tx28_fixup_flexcan(void *blob)
 763 {
 764         karo_fdt_del_prop(blob, "fsl,imx28-flexcan", 0x80032000, "transceiver-switch");
 765         karo_fdt_del_prop(blob, "fsl,imx28-flexcan", 0x80034000, "transceiver-switch");
 766 }
 767
 768 static void tx28_fixup_fec(void *blob)
 769 {
 770         karo_fdt_enable_node(blob, "ethernet1", 0);
 771 }
 772
 773 void ft_board_setup(void *blob, bd_t *bd)
 774 {
 775         const char *baseboard = getenv("baseboard");
 776
 777 #ifdef CONFIG_TX28_S
 778         /* TX28-41xx (aka TX28S) has no external RTC
 779          * and no I2C GPIO extender
 780          */
 781         karo_fdt_remove_node(blob, "ds1339");
 782         karo_fdt_remove_node(blob, "gpio5");
 783 #endif
 784         if (baseboard != NULL && strcmp(baseboard, "stk5-v5") == 0) {
 785                 karo_fdt_remove_node(blob, "stk5led");
 786         } else {
 787                 tx28_fixup_flexcan(blob);
 788                 tx28_fixup_fec(blob);
 789         }
 790
 791         if (baseboard != NULL && strcmp(baseboard, "stk5-v3") == 0) {
 792                 const char *otg_mode = getenv("otg_mode");
 793
 794                 if (otg_mode && (strcmp(otg_mode, "device") == 0 ||
 795                                         strcmp(otg_mode, "gadget") == 0))
 796                         karo_fdt_enable_node(blob, "can1", 0);
 797         }
 798
 799         fdt_fixup_mtdparts(blob, tx28_nand_nodes, ARRAY_SIZE(tx28_nand_nodes));
 800         fdt_fixup_ethernet(blob);
 801
 802         karo_fdt_fixup_touchpanel(blob);
 803         karo_fdt_fixup_usb_otg(blob, "usbotg", "fsl,usbphy");
 804         karo_fdt_update_fb_mode(blob, getenv("video_mode"));
 805 }
 806 #endif