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 == 0xba) {
 170                         /* Beagleboard Rev C4, 512MB Nand/256MB DDR*/
 171                         *mcfg = MICRON_V_MCFG_165(128 << 20);
 172                         *ctrla = MICRON_V_ACTIMA_165;
 173                         *ctrlb = MICRON_V_ACTIMB_165;
 174                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 175                         break;
 176                 } else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xbc) {
 177                         /* Beagleboard Rev C5, 256MB DDR */
 178                         *mcfg = MICRON_V_MCFG_200(256 << 20);
 179                         *ctrla = MICRON_V_ACTIMA_200;
 180                         *ctrlb = MICRON_V_ACTIMB_200;
 181                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
 182                         break;
 183                 }
 184         case REVISION_XM_A:
 185         case REVISION_XM_B:
 186         case REVISION_XM_C:
 187                 if (pop_mfr == 0) {
 188                         /* 256MB DDR */
 189                         *mcfg = MICRON_V_MCFG_200(256 << 20);
 190                         *ctrla = MICRON_V_ACTIMA_200;
 191                         *ctrlb = MICRON_V_ACTIMB_200;
 192                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
 193                 } else {
 194                         /* 512MB DDR */
 195                         *mcfg = NUMONYX_V_MCFG_165(512 << 20);
 196                         *ctrla = NUMONYX_V_ACTIMA_165;
 197                         *ctrlb = NUMONYX_V_ACTIMB_165;
 198                         *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 199                 }
 200                 break;
 201         default:
 202                 /* Assume 128MB and Micron/165MHz timings to be safe */
 203                 *mcfg = MICRON_V_MCFG_165(128 << 20);
 204                 *ctrla = MICRON_V_ACTIMA_165;
 205                 *ctrlb = MICRON_V_ACTIMB_165;
 206                 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 207         }
 208 }
 209 #endif
 210
 211 /*
 212  * Routine: get_expansion_id
 213  * Description: This function checks for expansion board by checking I2C
 214  *              bus 1 for the availability of an AT24C01B serial EEPROM.
 215  *              returns the device_vendor field from the EEPROM
 216  */
 217 unsigned int get_expansion_id(void)
 218 {
 219         i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 220
 221         /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
 222         if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
 223                 i2c_set_bus_num(TWL4030_I2C_BUS);
 224                 return BEAGLE_NO_EEPROM;
 225         }
 226
 227         /* read configuration data */
 228         i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
 229                  sizeof(expansion_config));
 230
 231         i2c_set_bus_num(TWL4030_I2C_BUS);
 232
 233         return expansion_config.device_vendor;
 234 }
 235
 236 /*
 237  * Configure DSS to display background color on DVID
 238  * Configure VENC to display color bar on S-Video
 239  */
 240 void beagle_display_init(void)
 241 {
 242         omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH);
 243         switch (get_board_revision()) {
 244         case REVISION_AXBX:
 245         case REVISION_CX:
 246         case REVISION_C4:
 247                 omap3_dss_panel_config(&dvid_cfg);
 248                 break;
 249         case REVISION_XM_A:
 250         case REVISION_XM_B:
 251         case REVISION_XM_C:
 252         default:
 253                 omap3_dss_panel_config(&dvid_cfg_xm);
 254                 break;
 255         }
 256 }
 257
 258 /*
 259  * Routine: misc_init_r
 260  * Description: Configure board specific parts
 261  */
 262 int misc_init_r(void)
 263 {
 264         struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
 265         struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
 266         struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE;
 267
 268         /* Enable i2c2 pullup resisters */
 269         writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
 270
 271         switch (get_board_revision()) {
 272         case REVISION_AXBX:
 273                 printf("Beagle Rev Ax/Bx\n");
 274                 setenv("beaglerev", "AxBx");
 275                 break;
 276         case REVISION_CX:
 277                 printf("Beagle Rev C1/C2/C3\n");
 278                 setenv("beaglerev", "Cx");
 279                 MUX_BEAGLE_C();
 280                 break;
 281         case REVISION_C4:
 282                 printf("Beagle Rev C4\n");
 283                 setenv("beaglerev", "C4");
 284                 MUX_BEAGLE_C();
 285                 /* Set VAUX2 to 1.8V for EHCI PHY */
 286                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 287                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 288                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 289                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 290                 break;
 291         case REVISION_XM_A:
 292                 printf("Beagle xM Rev A\n");
 293                 setenv("beaglerev", "xMA");
 294                 MUX_BEAGLE_XM();
 295                 /* Set VAUX2 to 1.8V for EHCI PHY */
 296                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 297                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 298                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 299                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 300                 break;
 301         case REVISION_XM_B:
 302                 printf("Beagle xM Rev B\n");
 303                 setenv("beaglerev", "xMB");
 304                 MUX_BEAGLE_XM();
 305                 /* Set VAUX2 to 1.8V for EHCI PHY */
 306                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 307                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 308                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 309                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 310                 break;
 311         case REVISION_XM_C:
 312                 printf("Beagle xM Rev C\n");
 313                 setenv("beaglerev", "xMC");
 314                 MUX_BEAGLE_XM();
 315                 /* Set VAUX2 to 1.8V for EHCI PHY */
 316                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 317                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 318                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 319                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 320                 break;
 321         default:
 322                 printf("Beagle unknown 0x%02x\n", get_board_revision());
 323                 MUX_BEAGLE_XM();
 324                 /* Set VAUX2 to 1.8V for EHCI PHY */
 325                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 326                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 327                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 328                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 329         }
 330
 331         switch (get_expansion_id()) {
 332         case TINCANTOOLS_ZIPPY:
 333                 printf("Recognized Tincantools Zippy board (rev %d %s)\n",
 334                         expansion_config.revision,
 335                         expansion_config.fab_revision);
 336                 MUX_TINCANTOOLS_ZIPPY();
 337                 setenv("buddy", "zippy");
 338                 break;
 339         case TINCANTOOLS_ZIPPY2:
 340                 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
 341                         expansion_config.revision,
 342                         expansion_config.fab_revision);
 343                 MUX_TINCANTOOLS_ZIPPY();
 344                 setenv("buddy", "zippy2");
 345                 break;
 346         case TINCANTOOLS_TRAINER:
 347                 printf("Recognized Tincantools Trainer board (rev %d %s)\n",
 348                         expansion_config.revision,
 349                         expansion_config.fab_revision);
 350                 MUX_TINCANTOOLS_ZIPPY();
 351                 MUX_TINCANTOOLS_TRAINER();
 352                 setenv("buddy", "trainer");
 353                 break;
 354         case TINCANTOOLS_SHOWDOG:
 355                 printf("Recognized Tincantools Showdow board (rev %d %s)\n",
 356                         expansion_config.revision,
 357                         expansion_config.fab_revision);
 358                 /* Place holder for DSS2 definition for showdog lcd */
 359                 setenv("defaultdisplay", "showdoglcd");
 360                 setenv("buddy", "showdog");
 361                 break;
 362         case KBADC_BEAGLEFPGA:
 363                 printf("Recognized KBADC Beagle FPGA board\n");
 364                 MUX_KBADC_BEAGLEFPGA();
 365                 setenv("buddy", "beaglefpga");
 366                 break;
 367         case LW_BEAGLETOUCH:
 368                 printf("Recognized Liquidware BeagleTouch board\n");
 369                 setenv("buddy", "beagletouch");
 370                 break;
 371         case BRAINMUX_LCDOG:
 372                 printf("Recognized Brainmux LCDog board\n");
 373                 setenv("buddy", "lcdog");
 374                 break;
 375         case BRAINMUX_LCDOGTOUCH:
 376                 printf("Recognized Brainmux LCDog Touch board\n");
 377                 setenv("buddy", "lcdogtouch");
 378                 break;
 379         case BBTOYS_WIFI:
 380                 printf("Recognized BeagleBoardToys WiFi board\n");
 381                 MUX_BBTOYS_WIFI()
 382                 setenv("buddy", "bbtoys-wifi");
 383                 break;;
 384         case BBTOYS_VGA:
 385                 printf("Recognized BeagleBoardToys VGA board\n");
 386                 break;;
 387         case BBTOYS_LCD:
 388                 printf("Recognized BeagleBoardToys LCD board\n");
 389                 break;;
 390         case BCT_BRETTL3:
 391             printf("Recognized bct electronic GmbH brettl3 board\n");
 392             break;
 393         case BEAGLE_NO_EEPROM:
 394                 printf("No EEPROM on expansion board\n");
 395                 setenv("buddy", "none");
 396                 break;
 397         default:
 398                 printf("Unrecognized expansion board: %x\n",
 399                         expansion_config.device_vendor);
 400                 setenv("buddy", "unknown");
 401         }
 402
 403         if (expansion_config.content == 1)
 404                 setenv(expansion_config.env_var, expansion_config.env_setting);
 405
 406         twl4030_power_init();
 407         switch (get_board_revision()) {
 408         case REVISION_XM_A:
 409         case REVISION_XM_B:
 410                 twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
 411                 break;
 412         default:
 413                 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
 414                 break;
 415         }
 416
 417         /* Set GPIO states before they are made outputs */
 418         writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
 419                 &gpio6_base->setdataout);
 420         writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 421                 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
 422
 423         /* Configure GPIOs to output */
 424         writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
 425         writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 426                 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
 427
 428         dieid_num_r();
 429         beagle_display_init();
 430         omap3_dss_enable();
 431
 432         return 0;
 433 }
 434
 435 /*
 436  * Routine: set_muxconf_regs
 437  * Description: Setting up the configuration Mux registers specific to the
 438  *              hardware. Many pins need to be moved from protect to primary
 439  *              mode.
 440  */
 441 void set_muxconf_regs(void)
 442 {
 443         MUX_BEAGLE();
 444 }
 445
 446 #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
 447 int board_mmc_init(bd_t *bis)
 448 {
 449         omap_mmc_init(0);
 450         return 0;
 451 }
 452 #endif
 453
 454 #ifdef CONFIG_USB_EHCI
 455
 456 #define GPIO_PHY_RESET 147
 457
 458 /* Reset is needed otherwise the kernel-driver will throw an error. */
 459 int ehci_hcd_stop(void)
 460 {
 461         pr_debug("Resetting OMAP3 EHCI\n");
 462         gpio_set_value(GPIO_PHY_RESET, 0);
 463         writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 464         /* disable USB clocks */
 465         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 466         sr32(&prcm_base->iclken_usbhost, 0, 1, 0);
 467         sr32(&prcm_base->fclken_usbhost, 0, 2, 0);
 468         sr32(&prcm_base->iclken3_core, 2, 1, 0);
 469         sr32(&prcm_base->fclken3_core, 2, 1, 0);
 470         return 0;
 471 }
 472
 473 /* Call usb_stop() before starting the kernel */
 474 void show_boot_progress(int val)
 475 {
 476         if(val == 15)
 477                 usb_stop();
 478 }
 479
 480 /*
 481  * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard.
 482  * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37.
 483  * See there for additional Copyrights.
 484  */
 485 int ehci_hcd_init(void)
 486 {
 487         pr_debug("Initializing OMAP3 ECHI\n");
 488
 489         /* Put the PHY in RESET */
 490         gpio_request(GPIO_PHY_RESET, "");
 491         gpio_direction_output(GPIO_PHY_RESET, 0);
 492         gpio_set_value(GPIO_PHY_RESET, 0);
 493
 494         /* Hold the PHY in RESET for enough time till DIR is high */
 495         /* Refer: ISSUE1 */
 496         udelay(10);
 497
 498         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 499         /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
 500         sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
 501         /*
 502          * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
 503          * and USBHOST_120M_FCLK (USBHOST_FCLK2)
 504          */
 505         sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
 506         /* Enable USBTTL_ICLK */
 507         sr32(&prcm_base->iclken3_core, 2, 1, 1);
 508         /* Enable USBTTL_FCLK */
 509         sr32(&prcm_base->fclken3_core, 2, 1, 1);
 510         pr_debug("USB clocks enabled\n");
 511
 512         /* perform TLL soft reset, and wait until reset is complete */
 513         writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET,
 514                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 515         /* Wait for TLL reset to complete */
 516         while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS)
 517                         & OMAP_USBTLL_SYSSTATUS_RESETDONE));
 518         pr_debug("TLL reset done\n");
 519
 520         writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
 521                 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
 522                 OMAP_USBTLL_SYSCONFIG_CACTIVITY,
 523                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 524
 525         /* Put UHH in NoIdle/NoStandby mode */
 526         writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP
 527                 | OMAP_UHH_SYSCONFIG_SIDLEMODE
 528                 | OMAP_UHH_SYSCONFIG_CACTIVITY
 529                 | OMAP_UHH_SYSCONFIG_MIDLEMODE,
 530                 OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 531
 532         /* setup burst configurations */
 533         writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
 534                 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
 535                 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN,
 536                 OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG);
 537
 538         /*
 539          * Refer ISSUE1:
 540          * Hold the PHY in RESET for enough time till
 541          * PHY is settled and ready
 542          */
 543         udelay(10);
 544         gpio_set_value(GPIO_PHY_RESET, 1);
 545
 546         hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE);
 547         hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10);
 548
 549         pr_debug("OMAP3 EHCI init done\n");
 550         return 0;
 551 }
 552
 553 #endif /* CONFIG_USB_EHCI */
 554
 555 #ifndef CONFIG_SPL_BUILD
 556 /*
 557  * This command returns the status of the user button on beagle xM
 558  * Input - none
 559  * Returns -    1 if button is held down
 560  *              0 if button is not held down
 561  */
 562 int do_userbutton(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 563 {
 564         int     button = 0;
 565         int     gpio;
 566
 567         /*
 568          * pass address parameter as argv[0] (aka command name),
 569          * and all remaining args
 570          */
 571         switch (get_board_revision()) {
 572         case REVISION_AXBX:
 573         case REVISION_CX:
 574         case REVISION_C4:
 575                 gpio = 7;
 576                 break;
 577         case REVISION_XM_A:
 578         case REVISION_XM_B:
 579         case REVISION_XM_C:
 580         default:
 581                 gpio = 4;
 582                 break;
 583         }
 584         gpio_request(gpio, "");
 585         gpio_direction_input(gpio);
 586         printf("The user button is currently ");
 587         if (gpio_get_value(gpio))
 588         {
 589                 button = 1;
 590                 printf("PRESSED.\n");
 591         }
 592         else
 593         {
 594                 button = 0;
 595                 printf("NOT pressed.\n");
 596         }
 597
 598         return !button;
 599 }
 600
 601 /* -------------------------------------------------------------------- */
 602
 603 U_BOOT_CMD(
 604         userbutton, CONFIG_SYS_MAXARGS, 1,      do_userbutton,
 605         "Return the status of the BeagleBoard USER button",
 606         ""
 607 );
 608 #endif