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 #include "beagle.h"
  44
  45 #define TWL4030_I2C_BUS                 0
  46 #define EXPANSION_EEPROM_I2C_BUS        1
  47 #define EXPANSION_EEPROM_I2C_ADDRESS    0x50
  48
  49 #define TINCANTOOLS_ZIPPY               0x01000100
  50 #define TINCANTOOLS_ZIPPY2              0x02000100
  51 #define TINCANTOOLS_TRAINER             0x04000100
  52 #define TINCANTOOLS_SHOWDOG             0x03000100
  53 #define KBADC_BEAGLEFPGA                0x01000600
  54 #define LW_BEAGLETOUCH                  0x01000700
  55 #define BRAINMUX_LCDOG                  0x01000800
  56 #define BRAINMUX_LCDOGTOUCH             0x02000800
  57 #define BBTOYS_WIFI                     0x01000B00
  58 #define BBTOYS_VGA                      0x02000B00
  59 #define BBTOYS_LCD                      0x03000B00
  60 #define BEAGLE_NO_EEPROM                0xffffffff
  61
  62 DECLARE_GLOBAL_DATA_PTR;
  63
  64 static struct {
  65         unsigned int device_vendor;
  66         unsigned char revision;
  67         unsigned char content;
  68         char fab_revision[8];
  69         char env_var[16];
  70         char env_setting[64];
  71 } expansion_config;
  72
  73 /*
  74  * Routine: board_init
  75  * Description: Early hardware init.
  76  */
  77 int board_init(void)
  78 {
  79         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  80         /* board id for Linux */
  81         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
  82         /* boot param addr */
  83         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  84
  85 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
  86         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
  87 #endif
  88
  89         return 0;
  90 }
  91
  92 /*
  93  * Routine: get_board_revision
  94  * Description: Detect if we are running on a Beagle revision Ax/Bx,
  95  *              C1/2/3, C4 or xM. This can be done by reading
  96  *              the level of GPIO173, GPIO172 and GPIO171. This should
  97  *              result in
  98  *              GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
  99  *              GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
 100  *              GPIO173, GPIO172, GPIO171: 1 0 1 => C4
 101  *              GPIO173, GPIO172, GPIO171: 0 0 0 => xM
 102  */
 103 int get_board_revision(void)
 104 {
 105         int revision;
 106
 107         if (!omap_request_gpio(171) &&
 108             !omap_request_gpio(172) &&
 109             !omap_request_gpio(173)) {
 110
 111                 omap_set_gpio_direction(171, 1);
 112                 omap_set_gpio_direction(172, 1);
 113                 omap_set_gpio_direction(173, 1);
 114
 115                 revision = omap_get_gpio_datain(173) << 2 |
 116                            omap_get_gpio_datain(172) << 1 |
 117                            omap_get_gpio_datain(171);
 118
 119                 omap_free_gpio(171);
 120                 omap_free_gpio(172);
 121                 omap_free_gpio(173);
 122         } else {
 123                 printf("Error: unable to acquire board revision GPIOs\n");
 124                 revision = -1;
 125         }
 126
 127         return revision;
 128 }
 129
 130 /*
 131  * Routine: get_expansion_id
 132  * Description: This function checks for expansion board by checking I2C
 133  *              bus 1 for the availability of an AT24C01B serial EEPROM.
 134  *              returns the device_vendor field from the EEPROM
 135  */
 136 unsigned int get_expansion_id(void)
 137 {
 138         i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 139
 140         /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
 141         if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
 142                 i2c_set_bus_num(TWL4030_I2C_BUS);
 143                 return BEAGLE_NO_EEPROM;
 144         }
 145
 146         /* read configuration data */
 147         i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
 148                  sizeof(expansion_config));
 149
 150         i2c_set_bus_num(TWL4030_I2C_BUS);
 151
 152         return expansion_config.device_vendor;
 153 }
 154
 155 /*
 156  * Routine: misc_init_r
 157  * Description: Configure board specific parts
 158  */
 159 int misc_init_r(void)
 160 {
 161         struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
 162         struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
 163         struct control_prog_io *prog_io_base = (struct gpio *)OMAP34XX_CTRL_BASE;
 164
 165         /* Enable i2c2 pullup resisters */
 166         writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
 167
 168         switch (get_board_revision()) {
 169         case REVISION_AXBX:
 170                 printf("Beagle Rev Ax/Bx\n");
 171                 setenv("beaglerev", "AxBx");
 172                 break;
 173         case REVISION_CX:
 174                 printf("Beagle Rev C1/C2/C3\n");
 175                 setenv("beaglerev", "Cx");
 176                 MUX_BEAGLE_C();
 177                 break;
 178         case REVISION_C4:
 179                 printf("Beagle Rev C4\n");
 180                 setenv("beaglerev", "C4");
 181                 MUX_BEAGLE_C();
 182                 /* Set VAUX2 to 1.8V for EHCI PHY */
 183                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 184                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 185                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 186                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 187                 break;
 188         case REVISION_XM_A:
 189                 printf("Beagle xM Rev A\n");
 190                 setenv("beaglerev", "xMA");
 191                 MUX_BEAGLE_XM();
 192                 /* Set VAUX2 to 1.8V for EHCI PHY */
 193                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 194                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 195                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 196                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 197                 break;
 198         case REVISION_XM_B:
 199                 printf("Beagle xM Rev B\n");
 200                 setenv("beaglerev", "xMB");
 201                 MUX_BEAGLE_XM();
 202                 /* Set VAUX2 to 1.8V for EHCI PHY */
 203                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 204                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 205                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 206                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 207                 break;
 208         default:
 209                 printf("Beagle unknown 0x%02x\n", get_board_revision());
 210                 MUX_BEAGLE_XM();
 211                 /* Set VAUX2 to 1.8V for EHCI PHY */
 212                 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
 213                                         TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
 214                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
 215                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
 216         }
 217
 218         switch (get_expansion_id()) {
 219         case TINCANTOOLS_ZIPPY:
 220                 printf("Recognized Tincantools Zippy board (rev %d %s)\n",
 221                         expansion_config.revision,
 222                         expansion_config.fab_revision);
 223                 MUX_TINCANTOOLS_ZIPPY();
 224                 setenv("buddy", "zippy");
 225                 break;
 226         case TINCANTOOLS_ZIPPY2:
 227                 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
 228                         expansion_config.revision,
 229                         expansion_config.fab_revision);
 230                 MUX_TINCANTOOLS_ZIPPY();
 231                 setenv("buddy", "zippy2");
 232                 break;
 233         case TINCANTOOLS_TRAINER:
 234                 printf("Recognized Tincantools Trainer board (rev %d %s)\n",
 235                         expansion_config.revision,
 236                         expansion_config.fab_revision);
 237                 MUX_TINCANTOOLS_ZIPPY();
 238                 MUX_TINCANTOOLS_TRAINER();
 239                 setenv("buddy", "trainer");
 240                 break;
 241         case TINCANTOOLS_SHOWDOG:
 242                 printf("Recognized Tincantools Showdow board (rev %d %s)\n",
 243                         expansion_config.revision,
 244                         expansion_config.fab_revision);
 245                 /* Place holder for DSS2 definition for showdog lcd */
 246                 setenv("defaultdisplay", "showdoglcd");
 247                 setenv("buddy", "showdog");
 248                 break;
 249         case KBADC_BEAGLEFPGA:
 250                 printf("Recognized KBADC Beagle FPGA board\n");
 251                 MUX_KBADC_BEAGLEFPGA();
 252                 setenv("buddy", "beaglefpga");
 253                 break;
 254         case LW_BEAGLETOUCH:
 255                 printf("Recognized Liquidware BeagleTouch board\n");
 256                 setenv("buddy", "beagletouch");
 257                 break;
 258         case BRAINMUX_LCDOG:
 259                 printf("Recognized Brainmux LCDog board\n");
 260                 setenv("buddy", "lcdog");
 261                 break;
 262         case BRAINMUX_LCDOGTOUCH:
 263                 printf("Recognized Brainmux LCDog Touch board\n");
 264                 setenv("buddy", "lcdogtouch");
 265                 break;
 266         case BBTOYS_WIFI:
 267                 printf("Recognized BeagleBoardToys WiFi board\n");
 268                 MUX_BBTOYS_WIFI()
 269                 setenv("buddy", "bbtoys-wifi");
 270                 break;;
 271         case BBTOYS_VGA:
 272                 printf("Recognized BeagleBoardToys VGA board\n");
 273                 break;;
 274         case BBTOYS_LCD:
 275                 printf("Recognized BeagleBoardToys LCD board\n");
 276                 break;;
 277         case BEAGLE_NO_EEPROM:
 278                 printf("No EEPROM on expansion board\n");
 279                 setenv("buddy", "none");
 280                 break;
 281         default:
 282                 printf("Unrecognized expansion board: %x\n",
 283                         expansion_config.device_vendor);
 284                 setenv("buddy", "unknown");
 285         }
 286
 287         if (expansion_config.content == 1)
 288                 setenv(expansion_config.env_var, expansion_config.env_setting);
 289
 290         twl4030_power_init();
 291         twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
 292
 293         /* Configure GPIOs to output */
 294         writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
 295         writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 296                 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
 297
 298         /* Set GPIOs */
 299         writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
 300                 &gpio6_base->setdataout);
 301         writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
 302                 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
 303
 304         dieid_num_r();
 305
 306         return 0;
 307 }
 308
 309 /*
 310  * Routine: set_muxconf_regs
 311  * Description: Setting up the configuration Mux registers specific to the
 312  *              hardware. Many pins need to be moved from protect to primary
 313  *              mode.
 314  */
 315 void set_muxconf_regs(void)
 316 {
 317         MUX_BEAGLE();
 318 }
 319
 320 #ifdef CONFIG_GENERIC_MMC
 321 int board_mmc_init(bd_t *bis)
 322 {
 323         omap_mmc_init(0);
 324         return 0;
 325 }
 326 #endif