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