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