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