board/ti/beagle/beagle.c

   1 /*
   2  * (C) Copyright 2004-2011
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Author :
   6  *      Sunil Kumar <sunilsaini05@gmail.com>
   7  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
   8  *
   9  * Derived from Beagle Board and 3430 SDP code by
  10  *      Richard Woodruff <r-woodruff2@ti.com>
  11  *      Syed Mohammed Khasim <khasim@ti.com>
  12  *
  13  *
  14  * See file CREDITS for list of people who contributed to this
  15  * project.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  */
  32 #include <common.h>
  33 #ifdef CONFIG_STATUS_LED
  34 #include <status_led.h>
  35 #endif
  36 #include <twl4030.h>
  37 #include <linux/mtd/nand.h>
  38 #include <asm/io.h>
  39 #include <asm/arch/mmc_host_def.h>
  40 #include <asm/arch/mux.h>
  41 #include <asm/arch/mem.h>
  42 #include <asm/arch/sys_proto.h>
  43 #include <asm/gpio.h>
  44 #include <asm/mach-types.h>
  45 #ifdef CONFIG_USB_EHCI
  46 #include <usb.h>
  47 #include <asm/arch/clocks.h>
  48 #include <asm/arch/clocks_omap3.h>
  49 #include <asm/arch/ehci_omap3.h>
  50 /* from drivers/usb/host/ehci-core.h */
  51 extern struct ehci_hccr *hccr;
  52 extern volatile struct ehci_hcor *hcor;
  53 #endif
  54 #include "beagle.h"
  55 #include <command.h>
  56
  57 #define pr_debug(fmt, args...) debug(fmt, ##args)
  58
  59 #define TWL4030_I2C_BUS                 0
  60 #define EXPANSION_EEPROM_I2C_BUS        1
  61 #define EXPANSION_EEPROM_I2C_ADDRESS    0x50
  62
  63 #define TINCANTOOLS_ZIPPY               0x01000100
  64 #define TINCANTOOLS_ZIPPY2              0x02000100
  65 #define TINCANTOOLS_TRAINER             0x04000100
  66 #define TINCANTOOLS_SHOWDOG             0x03000100
  67 #define KBADC_BEAGLEFPGA                0x01000600
  68 #define LW_BEAGLETOUCH                  0x01000700
  69 #define BRAINMUX_LCDOG                  0x01000800
  70 #define BRAINMUX_LCDOGTOUCH             0x02000800
  71 #define BBTOYS_WIFI                     0x01000B00
  72 #define BBTOYS_VGA                      0x02000B00
  73 #define BBTOYS_LCD                      0x03000B00
  74 #define BCT_BRETTL3                     0x01000F00
  75 #define BEAGLE_NO_EEPROM                0xffffffff
  76
  77 DECLARE_GLOBAL_DATA_PTR;
  78
  79 static struct {
  80         unsigned int device_vendor;
  81         unsigned char revision;
  82         unsigned char content;
  83         char fab_revision[8];
  84         char env_var[16];
  85         char env_setting[64];
  86 } expansion_config;
  87
  88 /*
  89  * Routine: board_init
  90  * Description: Early hardware init.
  91  */
  92 int board_init(void)
  93 {
  94         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  95         /* board id for Linux */
  96         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
  97         /* boot param addr */
  98         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  99
 100 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
 101         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
 102 #endif
 103
 104         return 0;
 105 }
 106
 107 /*
 108  * Routine: get_board_revision
 109  * Description: Detect if we are running on a Beagle revision Ax/Bx,
 110  *              C1/2/3, C4 or xM. This can be done by reading
 111  *              the level of GPIO173, GPIO172 and GPIO171. This should
 112  *              result in
 113  *              GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
 114  *              GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
 115  *              GPIO173, GPIO172, GPIO171: 1 0 1 => C4
 116  *              GPIO173, GPIO172, GPIO171: 0 0 0 => xM
 117  */
 118 int get_board_revision(void)
 119 {
 120         int revision;
 121
 122         if (!gpio_request(171, "") &&
 123             !gpio_request(172, "") &&
 124             !gpio_request(173, "")) {
 125
 126                 gpio_direction_input(171);
 127                 gpio_direction_input(172);
 128                 gpio_direction_input(173);
 129
 130                 revision = gpio_get_value(173) << 2 |
 131                            gpio_get_value(172) << 1 |
 132                            gpio_get_value(171);
 133         } else {
 134                 printf("Error: unable to acquire board revision GPIOs\n");
 135                 revision = -1;
 136         }
 137
 138         return revision;
 139 }
 140
 141 #ifdef CONFIG_SPL_BUILD
 142 /*
 143  * Routine: get_board_mem_timings
 144  * Description: If we use SPL then there is no x-loader nor config header
 145  * so we have to setup the DDR timings ourself on both banks.
 146  */
 147 void get_board_mem_timings(u32 *mcfg, u32 *ctrla, u32 *ctrlb, u32 *rfr_ctrl,
 148                 u32 *mr)
 149 {
 150         int pop_mfr, pop_id;
 151
 152         /*
 153          * We need to identify what PoP memory is on the board so that
 154          * we know what timings to use.  If we can't identify it then
 155          * we know it's an xM.  To map the ID values please see nand_ids.c
 156          */
 157         identify_nand_chip(&pop_mfr, &pop_id);
 158
 159         *mr = MICRON_V_MR_165;
 160         switch (get_board_revision()) {
 161         case REVISION_C4:
 162                 if (pop_mfr == NAND_MFR_STMICRO && pop_id == 0xba) {
 163                         /* 512MB DDR */
 164                         *mcfg = NUMONYX_V_MCFG_165(512 << 20);
 165                         *ctrla = NUMONYX_V_ACTIMA_165;
 166                         *ctrlb = NUMONYX_V_ACTIMB_165;
 167                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 168                         break;
 169                 } else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xbc) {
 170                         /* Beagleboard Rev C5, 256MB DDR */
 171                         *mcfg = MICRON_V_MCFG_200(256 << 20);
 172                         *ctrla = MICRON_V_ACTIMA_200;
 173                         *ctrlb = MICRON_V_ACTIMB_200;
 174                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
 175                         break;
 176                 }
 177         case REVISION_XM_A:
 178         case REVISION_XM_B:
 179         case REVISION_XM_C:
 180                 if (pop_mfr == 0) {
 181                         /* 256MB DDR */
 182                         *mcfg = MICRON_V_MCFG_200(256 << 20);
 183                         *ctrla = MICRON_V_ACTIMA_200;
 184                         *ctrlb = MICRON_V_ACTIMB_200;
 185                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
 186                 } else {
 187                         /* 512MB DDR */
 188                         *mcfg = NUMONYX_V_MCFG_165(512 << 20);
 189                         *ctrla = NUMONYX_V_ACTIMA_165;
 190                         *ctrlb = NUMONYX_V_ACTIMB_165;
 191                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 192                 }
 193                 break;
 194         default:
 195                 /* Assume 128MB and Micron/165MHz timings to be safe */
 196                 *mcfg = MICRON_V_MCFG_165(128 << 20);
 197                 *ctrla = MICRON_V_ACTIMA_165;
 198                 *ctrlb = MICRON_V_ACTIMB_165;
 199                 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 200         }
 201 }
 202 #endif
 203
 204 /*
 205  * Routine: get_expansion_id
 206  * Description: This function checks for expansion board by checking I2C
 207  *              bus 1 for the availability of an AT24C01B serial EEPROM.
 208  *              returns the device_vendor field from the EEPROM
 209  */
 210 unsigned int get_expansion_id(void)
 211 {
 212         i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 213
 214         /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
 215         if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
 216                 i2c_set_bus_num(TWL4030_I2C_BUS);
 217                 return BEAGLE_NO_EEPROM;
 218         }
 219
 220         /* read configuration data */
 221         i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
 222                  sizeof(expansion_config));
 223
 224         i2c_set_bus_num(TWL4030_I2C_BUS);
 225
 226         return expansion_config.device_vendor;
 227 }
 228
 229 /*
 230  * Configure DSS to display background color on DVID
 231  * Configure VENC to display color bar on S-Video
 232  */
 233 void beagle_display_init(void)
 234 {
 235         omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH);
 236         switch (get_board_revision()) {
 237         case REVISION_AXBX:
 238         case REVISION_CX:
 239         case REVISION_C4:
 240                 omap3_dss_panel_config(&dvid_cfg);
 241                 break;
 242         case REVISION_XM_A:
 243         case REVISION_XM_B:
 244         case REVISION_XM_C:
 245         default:
 246                 omap3_dss_panel_config(&dvid_cfg_xm);
 247                 break;
 248         }
 249 }
 250
 251 /*
 252  * Routine: misc_init_r
 253  * Description: Configure board specific parts
 254  */
 255 int misc_init_r(void)
 256 {
 257         struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
 258         struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
 259         struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE;
 260
 261         /* Enable i2c2 pullup resisters */
 262         writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
 263
 264         switch (get_board_revision()) {
 265         case REVISION_AXBX:
 266                 printf("Beagle Rev Ax/Bx\n");
 267                 setenv("beaglerev", "AxBx");
 268                 break;
 269         case REVISION_CX:
 270                 printf("Beagle Rev C1/C2/C3\n");
 271                 setenv("beaglerev", "Cx");
 272                 MUX_BEAGLE_C();
 273                 break;
 274         case REVISION_C4:
 275                 printf("Beagle Rev C4\n");
 276                 setenv("beaglerev", "C4");
 277                 MUX_BEAGLE_C();
 278                 /* Set VAUX2 to 1.8V for EHCI PHY */
 279                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 280                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 281                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 282                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 283                 break;
 284         case REVISION_XM_A:
 285                 printf("Beagle xM Rev A\n");
 286                 setenv("beaglerev", "xMA");
 287                 MUX_BEAGLE_XM();
 288                 /* Set VAUX2 to 1.8V for EHCI PHY */
 289                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 290                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 291                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 292                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 293                 break;
 294         case REVISION_XM_B:
 295                 printf("Beagle xM Rev B\n");
 296                 setenv("beaglerev", "xMB");
 297                 MUX_BEAGLE_XM();
 298                 /* Set VAUX2 to 1.8V for EHCI PHY */
 299                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 300                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 301                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 302                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 303                 break;
 304         case REVISION_XM_C:
 305                 printf("Beagle xM Rev C\n");
 306                 setenv("beaglerev", "xMC");
 307                 MUX_BEAGLE_XM();
 308                 /* Set VAUX2 to 1.8V for EHCI PHY */
 309                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 310                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 311                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 312                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 313                 break;
 314         default:
 315                 printf("Beagle unknown 0x%02x\n", get_board_revision());
 316                 MUX_BEAGLE_XM();
 317                 /* Set VAUX2 to 1.8V for EHCI PHY */
 318                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 319                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 320                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 321                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 322         }
 323
 324         switch (get_expansion_id()) {
 325         case TINCANTOOLS_ZIPPY:
 326                 printf("Recognized Tincantools Zippy board (rev %d %s)\n",
 327                         expansion_config.revision,
 328                         expansion_config.fab_revision);
 329                 MUX_TINCANTOOLS_ZIPPY();
 330                 setenv("buddy", "zippy");
 331                 break;
 332         case TINCANTOOLS_ZIPPY2:
 333                 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
 334                         expansion_config.revision,
 335                         expansion_config.fab_revision);
 336                 MUX_TINCANTOOLS_ZIPPY();
 337                 setenv("buddy", "zippy2");
 338                 break;
 339         case TINCANTOOLS_TRAINER:
 340                 printf("Recognized Tincantools Trainer board (rev %d %s)\n",
 341                         expansion_config.revision,
 342                         expansion_config.fab_revision);
 343                 MUX_TINCANTOOLS_ZIPPY();
 344                 MUX_TINCANTOOLS_TRAINER();
 345                 setenv("buddy", "trainer");
 346                 break;
 347         case TINCANTOOLS_SHOWDOG:
 348                 printf("Recognized Tincantools Showdow board (rev %d %s)\n",
 349                         expansion_config.revision,
 350                         expansion_config.fab_revision);
 351                 /* Place holder for DSS2 definition for showdog lcd */
 352                 setenv("defaultdisplay", "showdoglcd");
 353                 setenv("buddy", "showdog");
 354                 break;
 355         case KBADC_BEAGLEFPGA:
 356                 printf("Recognized KBADC Beagle FPGA board\n");
 357                 MUX_KBADC_BEAGLEFPGA();
 358                 setenv("buddy", "beaglefpga");
 359                 break;
 360         case LW_BEAGLETOUCH:
 361                 printf("Recognized Liquidware BeagleTouch board\n");
 362                 setenv("buddy", "beagletouch");
 363                 break;
 364         case BRAINMUX_LCDOG:
 365                 printf("Recognized Brainmux LCDog board\n");
 366                 setenv("buddy", "lcdog");
 367                 break;
 368         case BRAINMUX_LCDOGTOUCH:
 369                 printf("Recognized Brainmux LCDog Touch board\n");
 370                 setenv("buddy", "lcdogtouch");
 371                 break;
 372         case BBTOYS_WIFI:
 373                 printf("Recognized BeagleBoardToys WiFi board\n");
 374                 MUX_BBTOYS_WIFI()
 375                 setenv("buddy", "bbtoys-wifi");
 376                 break;;
 377         case BBTOYS_VGA:
 378                 printf("Recognized BeagleBoardToys VGA board\n");
 379                 break;;
 380         case BBTOYS_LCD:
 381                 printf("Recognized BeagleBoardToys LCD board\n");
 382                 break;;
 383         case BCT_BRETTL3:
 384             printf("Recognized bct electronic GmbH brettl3 board\n");
 385             break;
 386         case BEAGLE_NO_EEPROM:
 387                 printf("No EEPROM on expansion board\n");
 388                 setenv("buddy", "none");
 389                 break;
 390         default:
 391                 printf("Unrecognized expansion board: %x\n",
 392                         expansion_config.device_vendor);
 393                 setenv("buddy", "unknown");
 394         }
 395
 396         if (expansion_config.content == 1)
 397                 setenv(expansion_config.env_var, expansion_config.env_setting);
 398
 399         twl4030_power_init();
 400         switch (get_board_revision()) {
 401         case REVISION_XM_A:
 402         case REVISION_XM_B:
 403                 twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
 404                 break;
 405         default:
 406                 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
 407                 break;
 408         }
 409
 410         /* Set GPIO states before they are made outputs */
 411         writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
 412                 &gpio6_base->setdataout);
 413         writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 414                 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
 415
 416         /* Configure GPIOs to output */
 417         writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
 418         writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 419                 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
 420
 421         dieid_num_r();
 422         beagle_display_init();
 423         omap3_dss_enable();
 424
 425         return 0;
 426 }
 427
 428 /*
 429  * Routine: set_muxconf_regs
 430  * Description: Setting up the configuration Mux registers specific to the
 431  *              hardware. Many pins need to be moved from protect to primary
 432  *              mode.
 433  */
 434 void set_muxconf_regs(void)
 435 {
 436         MUX_BEAGLE();
 437 }
 438
 439 #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
 440 int board_mmc_init(bd_t *bis)
 441 {
 442         omap_mmc_init(0);
 443         return 0;
 444 }
 445 #endif
 446
 447 #ifdef CONFIG_USB_EHCI
 448
 449 #define GPIO_PHY_RESET 147
 450
 451 /* Reset is needed otherwise the kernel-driver will throw an error. */
 452 int ehci_hcd_stop(void)
 453 {
 454         pr_debug("Resetting OMAP3 EHCI\n");
 455         gpio_set_value(GPIO_PHY_RESET, 0);
 456         writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 457         /* disable USB clocks */
 458         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 459         sr32(&prcm_base->iclken_usbhost, 0, 1, 0);
 460         sr32(&prcm_base->fclken_usbhost, 0, 2, 0);
 461         sr32(&prcm_base->iclken3_core, 2, 1, 0);
 462         sr32(&prcm_base->fclken3_core, 2, 1, 0);
 463         return 0;
 464 }
 465
 466 /* Call usb_stop() before starting the kernel */
 467 void show_boot_progress(int val)
 468 {
 469         if(val == 15)
 470                 usb_stop();
 471 }
 472
 473 /*
 474  * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard.
 475  * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37.
 476  * See there for additional Copyrights.
 477  */
 478 int ehci_hcd_init(void)
 479 {
 480         pr_debug("Initializing OMAP3 ECHI\n");
 481
 482         /* Put the PHY in RESET */
 483         gpio_request(GPIO_PHY_RESET, "");
 484         gpio_direction_output(GPIO_PHY_RESET, 0);
 485         gpio_set_value(GPIO_PHY_RESET, 0);
 486
 487         /* Hold the PHY in RESET for enough time till DIR is high */
 488         /* Refer: ISSUE1 */
 489         udelay(10);
 490
 491         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 492         /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
 493         sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
 494         /*
 495          * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
 496          * and USBHOST_120M_FCLK (USBHOST_FCLK2)
 497          */
 498         sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
 499         /* Enable USBTTL_ICLK */
 500         sr32(&prcm_base->iclken3_core, 2, 1, 1);
 501         /* Enable USBTTL_FCLK */
 502         sr32(&prcm_base->fclken3_core, 2, 1, 1);
 503         pr_debug("USB clocks enabled\n");
 504
 505         /* perform TLL soft reset, and wait until reset is complete */
 506         writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET,
 507                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 508         /* Wait for TLL reset to complete */
 509         while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS)
 510                         & OMAP_USBTLL_SYSSTATUS_RESETDONE));
 511         pr_debug("TLL reset done\n");
 512
 513         writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
 514                 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
 515                 OMAP_USBTLL_SYSCONFIG_CACTIVITY,
 516                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 517
 518         /* Put UHH in NoIdle/NoStandby mode */
 519         writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP
 520                 | OMAP_UHH_SYSCONFIG_SIDLEMODE
 521                 | OMAP_UHH_SYSCONFIG_CACTIVITY
 522                 | OMAP_UHH_SYSCONFIG_MIDLEMODE,
 523                 OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 524
 525         /* setup burst configurations */
 526         writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
 527                 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
 528                 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN,
 529                 OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG);
 530
 531         /*
 532          * Refer ISSUE1:
 533          * Hold the PHY in RESET for enough time till
 534          * PHY is settled and ready
 535          */
 536         udelay(10);
 537         gpio_set_value(GPIO_PHY_RESET, 1);
 538
 539         hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE);
 540         hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10);
 541
 542         pr_debug("OMAP3 EHCI init done\n");
 543         return 0;
 544 }
 545
 546 #endif /* CONFIG_USB_EHCI */
 547
 548 #ifndef CONFIG_SPL_BUILD
 549 /*
 550  * This command returns the status of the user button on beagle xM
 551  * Input - none
 552  * Returns -    1 if button is held down
 553  *              0 if button is not held down
 554  */
 555 int do_userbutton(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 556 {
 557         int     button = 0;
 558         int     gpio;
 559
 560         /*
 561          * pass address parameter as argv[0] (aka command name),
 562          * and all remaining args
 563          */
 564         switch (get_board_revision()) {
 565         case REVISION_AXBX:
 566         case REVISION_CX:
 567         case REVISION_C4:
 568                 gpio = 7;
 569                 break;
 570         case REVISION_XM_A:
 571         case REVISION_XM_B:
 572         case REVISION_XM_C:
 573         default:
 574                 gpio = 4;
 575                 break;
 576         }
 577         gpio_request(gpio, "");
 578         gpio_direction_input(gpio);
 579         printf("The user button is currently ");
 580         if (gpio_get_value(gpio))
 581         {
 582                 button = 1;
 583                 printf("PRESSED.\n");
 584         }
 585         else
 586         {
 587                 button = 0;
 588                 printf("NOT pressed.\n");
 589         }
 590
 591         return !button;
 592 }
 593
 594 /* -------------------------------------------------------------------- */
 595
 596 U_BOOT_CMD(
 597         userbutton, CONFIG_SYS_MAXARGS, 1,      do_userbutton,
 598         "Return the status of the BeagleBoard USER button",
 599         ""
 600 );
 601 #endif