board/ti/beagle/beagle.c

   1 /*
   2  * (C) Copyright 2004-2008
   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 <asm/io.h>
  38 #include <asm/arch/mmc_host_def.h>
  39 #include <asm/arch/mux.h>
  40 #include <asm/arch/sys_proto.h>
  41 #include <asm/arch/gpio.h>
  42 #include <asm/mach-types.h>
  43 #ifdef CONFIG_USB_EHCI
  44 #include <usb.h>
  45 #include <asm/arch/clocks.h>
  46 #include <asm/arch/clocks_omap3.h>
  47 #include <asm/arch/ehci_omap3.h>
  48 /* from drivers/usb/host/ehci-core.h */
  49 extern struct ehci_hccr *hccr;
  50 extern volatile struct ehci_hcor *hcor;
  51 #endif
  52 #include "beagle.h"
  53 #include <command.h>
  54
  55 #define pr_debug(fmt, args...) debug(fmt, ##args)
  56
  57 #define TWL4030_I2C_BUS                 0
  58 #define EXPANSION_EEPROM_I2C_BUS        1
  59 #define EXPANSION_EEPROM_I2C_ADDRESS    0x50
  60
  61 #define TINCANTOOLS_ZIPPY               0x01000100
  62 #define TINCANTOOLS_ZIPPY2              0x02000100
  63 #define TINCANTOOLS_TRAINER             0x04000100
  64 #define TINCANTOOLS_SHOWDOG             0x03000100
  65 #define KBADC_BEAGLEFPGA                0x01000600
  66 #define LW_BEAGLETOUCH                  0x01000700
  67 #define BRAINMUX_LCDOG                  0x01000800
  68 #define BRAINMUX_LCDOGTOUCH             0x02000800
  69 #define BBTOYS_WIFI                     0x01000B00
  70 #define BBTOYS_VGA                      0x02000B00
  71 #define BBTOYS_LCD                      0x03000B00
  72 #define BEAGLE_NO_EEPROM                0xffffffff
  73
  74 DECLARE_GLOBAL_DATA_PTR;
  75
  76 static struct {
  77         unsigned int device_vendor;
  78         unsigned char revision;
  79         unsigned char content;
  80         char fab_revision[8];
  81         char env_var[16];
  82         char env_setting[64];
  83 } expansion_config;
  84
  85 /*
  86  * Routine: board_init
  87  * Description: Early hardware init.
  88  */
  89 int board_init(void)
  90 {
  91         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  92         /* board id for Linux */
  93         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
  94         /* boot param addr */
  95         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  96
  97 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
  98         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
  99 #endif
 100
 101         return 0;
 102 }
 103
 104 /*
 105  * Routine: get_board_revision
 106  * Description: Detect if we are running on a Beagle revision Ax/Bx,
 107  *              C1/2/3, C4 or xM. This can be done by reading
 108  *              the level of GPIO173, GPIO172 and GPIO171. This should
 109  *              result in
 110  *              GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
 111  *              GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
 112  *              GPIO173, GPIO172, GPIO171: 1 0 1 => C4
 113  *              GPIO173, GPIO172, GPIO171: 0 0 0 => xM
 114  */
 115 int get_board_revision(void)
 116 {
 117         int revision;
 118
 119         if (!omap_request_gpio(171) &&
 120             !omap_request_gpio(172) &&
 121             !omap_request_gpio(173)) {
 122
 123                 omap_set_gpio_direction(171, 1);
 124                 omap_set_gpio_direction(172, 1);
 125                 omap_set_gpio_direction(173, 1);
 126
 127                 revision = omap_get_gpio_datain(173) << 2 |
 128                            omap_get_gpio_datain(172) << 1 |
 129                            omap_get_gpio_datain(171);
 130
 131                 omap_free_gpio(171);
 132                 omap_free_gpio(172);
 133                 omap_free_gpio(173);
 134         } else {
 135                 printf("Error: unable to acquire board revision GPIOs\n");
 136                 revision = -1;
 137         }
 138
 139         return revision;
 140 }
 141
 142 /*
 143  * Routine: get_expansion_id
 144  * Description: This function checks for expansion board by checking I2C
 145  *              bus 1 for the availability of an AT24C01B serial EEPROM.
 146  *              returns the device_vendor field from the EEPROM
 147  */
 148 unsigned int get_expansion_id(void)
 149 {
 150         i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 151
 152         /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
 153         if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
 154                 i2c_set_bus_num(TWL4030_I2C_BUS);
 155                 return BEAGLE_NO_EEPROM;
 156         }
 157
 158         /* read configuration data */
 159         i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
 160                  sizeof(expansion_config));
 161
 162         i2c_set_bus_num(TWL4030_I2C_BUS);
 163
 164         return expansion_config.device_vendor;
 165 }
 166
 167 /*
 168  * Routine: misc_init_r
 169  * Description: Configure board specific parts
 170  */
 171 int misc_init_r(void)
 172 {
 173         struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
 174         struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
 175         struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE;
 176
 177         /* Enable i2c2 pullup resisters */
 178         writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
 179
 180         switch (get_board_revision()) {
 181         case REVISION_AXBX:
 182                 printf("Beagle Rev Ax/Bx\n");
 183                 setenv("beaglerev", "AxBx");
 184                 break;
 185         case REVISION_CX:
 186                 printf("Beagle Rev C1/C2/C3\n");
 187                 setenv("beaglerev", "Cx");
 188                 MUX_BEAGLE_C();
 189                 break;
 190         case REVISION_C4:
 191                 printf("Beagle Rev C4\n");
 192                 setenv("beaglerev", "C4");
 193                 MUX_BEAGLE_C();
 194                 /* Set VAUX2 to 1.8V for EHCI PHY */
 195                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 196                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 197                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 198                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 199                 break;
 200         case REVISION_XM_A:
 201                 printf("Beagle xM Rev A\n");
 202                 setenv("beaglerev", "xMA");
 203                 MUX_BEAGLE_XM();
 204                 /* Set VAUX2 to 1.8V for EHCI PHY */
 205                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 206                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 207                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 208                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 209                 break;
 210         case REVISION_XM_B:
 211                 printf("Beagle xM Rev B\n");
 212                 setenv("beaglerev", "xMB");
 213                 MUX_BEAGLE_XM();
 214                 /* Set VAUX2 to 1.8V for EHCI PHY */
 215                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 216                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 217                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 218                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 219                 break;
 220         case REVISION_XM_C:
 221                 printf("Beagle xM Rev C\n");
 222                 setenv("beaglerev", "xMC");
 223                 MUX_BEAGLE_XM();
 224                 /* Set VAUX2 to 1.8V for EHCI PHY */
 225                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 226                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 227                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 228                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 229                 break;
 230         default:
 231                 printf("Beagle unknown 0x%02x\n", get_board_revision());
 232                 MUX_BEAGLE_XM();
 233                 /* Set VAUX2 to 1.8V for EHCI PHY */
 234                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 235                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 236                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 237                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 238         }
 239
 240         switch (get_expansion_id()) {
 241         case TINCANTOOLS_ZIPPY:
 242                 printf("Recognized Tincantools Zippy board (rev %d %s)\n",
 243                         expansion_config.revision,
 244                         expansion_config.fab_revision);
 245                 MUX_TINCANTOOLS_ZIPPY();
 246                 setenv("buddy", "zippy");
 247                 break;
 248         case TINCANTOOLS_ZIPPY2:
 249                 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
 250                         expansion_config.revision,
 251                         expansion_config.fab_revision);
 252                 MUX_TINCANTOOLS_ZIPPY();
 253                 setenv("buddy", "zippy2");
 254                 break;
 255         case TINCANTOOLS_TRAINER:
 256                 printf("Recognized Tincantools Trainer board (rev %d %s)\n",
 257                         expansion_config.revision,
 258                         expansion_config.fab_revision);
 259                 MUX_TINCANTOOLS_ZIPPY();
 260                 MUX_TINCANTOOLS_TRAINER();
 261                 setenv("buddy", "trainer");
 262                 break;
 263         case TINCANTOOLS_SHOWDOG:
 264                 printf("Recognized Tincantools Showdow board (rev %d %s)\n",
 265                         expansion_config.revision,
 266                         expansion_config.fab_revision);
 267                 /* Place holder for DSS2 definition for showdog lcd */
 268                 setenv("defaultdisplay", "showdoglcd");
 269                 setenv("buddy", "showdog");
 270                 break;
 271         case KBADC_BEAGLEFPGA:
 272                 printf("Recognized KBADC Beagle FPGA board\n");
 273                 MUX_KBADC_BEAGLEFPGA();
 274                 setenv("buddy", "beaglefpga");
 275                 break;
 276         case LW_BEAGLETOUCH:
 277                 printf("Recognized Liquidware BeagleTouch board\n");
 278                 setenv("buddy", "beagletouch");
 279                 break;
 280         case BRAINMUX_LCDOG:
 281                 printf("Recognized Brainmux LCDog board\n");
 282                 setenv("buddy", "lcdog");
 283                 break;
 284         case BRAINMUX_LCDOGTOUCH:
 285                 printf("Recognized Brainmux LCDog Touch board\n");
 286                 setenv("buddy", "lcdogtouch");
 287                 break;
 288         case BBTOYS_WIFI:
 289                 printf("Recognized BeagleBoardToys WiFi board\n");
 290                 MUX_BBTOYS_WIFI()
 291                 setenv("buddy", "bbtoys-wifi");
 292                 break;;
 293         case BBTOYS_VGA:
 294                 printf("Recognized BeagleBoardToys VGA board\n");
 295                 break;;
 296         case BBTOYS_LCD:
 297                 printf("Recognized BeagleBoardToys LCD board\n");
 298                 break;;
 299         case BEAGLE_NO_EEPROM:
 300                 printf("No EEPROM on expansion board\n");
 301                 setenv("buddy", "none");
 302                 break;
 303         default:
 304                 printf("Unrecognized expansion board: %x\n",
 305                         expansion_config.device_vendor);
 306                 setenv("buddy", "unknown");
 307         }
 308
 309         if (expansion_config.content == 1)
 310                 setenv(expansion_config.env_var, expansion_config.env_setting);
 311
 312         twl4030_power_init();
 313         twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
 314
 315         /* Set GPIO states before they are made outputs */
 316         writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
 317                 &gpio6_base->setdataout);
 318         writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 319                 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
 320
 321         /* Configure GPIOs to output */
 322         writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
 323         writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 324                 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
 325
 326         dieid_num_r();
 327
 328         return 0;
 329 }
 330
 331 /*
 332  * Routine: set_muxconf_regs
 333  * Description: Setting up the configuration Mux registers specific to the
 334  *              hardware. Many pins need to be moved from protect to primary
 335  *              mode.
 336  */
 337 void set_muxconf_regs(void)
 338 {
 339         MUX_BEAGLE();
 340 }
 341
 342 #ifdef CONFIG_GENERIC_MMC
 343 int board_mmc_init(bd_t *bis)
 344 {
 345         omap_mmc_init(0);
 346         return 0;
 347 }
 348 #endif
 349
 350 #ifdef CONFIG_USB_EHCI
 351
 352 #define GPIO_PHY_RESET 147
 353
 354 /* Reset is needed otherwise the kernel-driver will throw an error. */
 355 int ehci_hcd_stop(void)
 356 {
 357         pr_debug("Resetting OMAP3 EHCI\n");
 358         omap_set_gpio_dataout(GPIO_PHY_RESET, 0);
 359         writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 360         /* disable USB clocks */
 361         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 362         sr32(&prcm_base->iclken_usbhost, 0, 1, 0);
 363         sr32(&prcm_base->fclken_usbhost, 0, 2, 0);
 364         sr32(&prcm_base->iclken3_core, 2, 1, 0);
 365         sr32(&prcm_base->fclken3_core, 2, 1, 0);
 366         return 0;
 367 }
 368
 369 /* Call usb_stop() before starting the kernel */
 370 void show_boot_progress(int val)
 371 {
 372         if(val == 15)
 373                 usb_stop();
 374 }
 375
 376 /*
 377  * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard.
 378  * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37.
 379  * See there for additional Copyrights.
 380  */
 381 int ehci_hcd_init(void)
 382 {
 383         pr_debug("Initializing OMAP3 ECHI\n");
 384
 385         /* Put the PHY in RESET */
 386         omap_request_gpio(GPIO_PHY_RESET);
 387         omap_set_gpio_direction(GPIO_PHY_RESET, 0);
 388         omap_set_gpio_dataout(GPIO_PHY_RESET, 0);
 389
 390         /* Hold the PHY in RESET for enough time till DIR is high */
 391         /* Refer: ISSUE1 */
 392         udelay(10);
 393
 394         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 395         /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
 396         sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
 397         /*
 398          * Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
 399          * and USBHOST_120M_FCLK (USBHOST_FCLK2)
 400          */
 401         sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
 402         /* Enable USBTTL_ICLK */
 403         sr32(&prcm_base->iclken3_core, 2, 1, 1);
 404         /* Enable USBTTL_FCLK */
 405         sr32(&prcm_base->fclken3_core, 2, 1, 1);
 406         pr_debug("USB clocks enabled\n");
 407
 408         /* perform TLL soft reset, and wait until reset is complete */
 409         writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET,
 410                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 411         /* Wait for TLL reset to complete */
 412         while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS)
 413                         & OMAP_USBTLL_SYSSTATUS_RESETDONE));
 414         pr_debug("TLL reset done\n");
 415
 416         writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
 417                 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
 418                 OMAP_USBTLL_SYSCONFIG_CACTIVITY,
 419                 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
 420
 421         /* Put UHH in NoIdle/NoStandby mode */
 422         writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP
 423                 | OMAP_UHH_SYSCONFIG_SIDLEMODE
 424                 | OMAP_UHH_SYSCONFIG_CACTIVITY
 425                 | OMAP_UHH_SYSCONFIG_MIDLEMODE,
 426                 OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
 427
 428         /* setup burst configurations */
 429         writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
 430                 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
 431                 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN,
 432                 OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG);
 433
 434         /*
 435          * Refer ISSUE1:
 436          * Hold the PHY in RESET for enough time till
 437          * PHY is settled and ready
 438          */
 439         udelay(10);
 440         omap_set_gpio_dataout(GPIO_PHY_RESET, 1);
 441
 442         hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE);
 443         hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10);
 444
 445         pr_debug("OMAP3 EHCI init done\n");
 446         return 0;
 447 }
 448
 449 #endif /* CONFIG_USB_EHCI */
 450
 451 /*
 452  * This command returns the status of the user button on beagle xM
 453  * Input - none
 454  * Returns -    1 if button is held down
 455  *              0 if button is not held down
 456  */
 457 int do_userbutton (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 458 {
 459         int     button = 0;
 460         int     gpio;
 461
 462         /*
 463          * pass address parameter as argv[0] (aka command name),
 464          * and all remaining args
 465          */
 466         switch (get_board_revision()) {
 467         case REVISION_AXBX:
 468         case REVISION_CX:
 469         case REVISION_C4:
 470                 gpio = 7;
 471                 break;
 472         case REVISION_XM_A:
 473         case REVISION_XM_B:
 474         case REVISION_XM_C:
 475         default:
 476                 gpio = 4;
 477                 break;
 478         }
 479         omap_request_gpio(gpio);
 480         omap_set_gpio_direction(gpio, 1);
 481         printf("The user button is currently ");
 482         if(omap_get_gpio_datain(gpio))
 483         {
 484                 button = 1;
 485                 printf("PRESSED.\n");
 486         }
 487         else
 488         {
 489                 button = 0;
 490                 printf("NOT pressed.\n");
 491         }
 492
 493         omap_free_gpio(gpio);
 494
 495         return !button;
 496 }
 497
 498 /* -------------------------------------------------------------------- */
 499
 500 U_BOOT_CMD(
 501         userbutton, CONFIG_SYS_MAXARGS, 1,      do_userbutton,
 502         "Return the status of the BeagleBoard USER button",
 503         ""
 504 );