board/omap3/zoom2/zoom2.c

   1 /*
   2  * Copyright (c) 2009 Wind River Systems, Inc.
   3  * Tom Rix <Tom.Rix@windriver.com>
   4  *
   5  * Derived from Zoom1 code by
   6  *      Nishanth Menon <nm@ti.com>
   7  *      Sunil Kumar <sunilsaini05@gmail.com>
   8  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
   9  *      Richard Woodruff <r-woodruff2@ti.com>
  10  *      Syed Mohammed Khasim <khasim@ti.com>
  11  *
  12  *
  13  * See file CREDITS for list of people who contributed to this
  14  * project.
  15  *
  16  * This program is free software; you can redistribute it and/or
  17  * modify it under the terms of the GNU General Public License as
  18  * published by the Free Software Foundation; either version 2 of
  19  * the License, or (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  29  * MA 02111-1307 USA
  30  */
  31 #include <common.h>
  32 #ifdef CONFIG_STATUS_LED
  33 #include <status_led.h>
  34 #endif
  35 #include <twl4030.h>
  36 #include <asm/io.h>
  37 #include <asm/arch/gpio.h>
  38 #include <asm/arch/mem.h>
  39 #include <asm/arch/mux.h>
  40 #include <asm/arch/sys_proto.h>
  41 #include <asm/mach-types.h>
  42 #include "zoom2.h"
  43 #include "zoom2_serial.h"
  44
  45 /*
  46  * This the the zoom2, board specific, gpmc configuration for the
  47  * quad uart on the debug board.   The more general gpmc configurations
  48  * are setup at the cpu level in cpu/arm_cortexa8/omap3/mem.c
  49  *
  50  * The details of the setting of the serial gpmc setup are not available.
  51  * The values were provided by another party.
  52  */
  53 void enable_gpmc_cs_config(u32 *gpmc_config, struct gpmc_cs *cs, u32 base,
  54                         u32 size);
  55
  56 static u32 gpmc_serial_TL16CP754C[GPMC_MAX_REG] = {
  57         0x00011000,
  58         0x001F1F01,
  59         0x00080803,
  60         0x1D091D09,
  61         0x041D1F1F,
  62         0x1D0904C4, 0
  63 };
  64
  65 /* Used to track the revision of the board */
  66 static zoom2_revision revision = ZOOM2_REVISION_UNKNOWN;
  67
  68 /*
  69  * Routine: zoom2_get_revision
  70  * Description: Return the revision of the Zoom2 this code is running on.
  71  */
  72 zoom2_revision zoom2_get_revision(void)
  73 {
  74         return revision;
  75 }
  76
  77 /*
  78  * Routine: zoom2_identify
  79  * Description: Detect which version of Zoom2 we are running on.
  80  */
  81 void zoom2_identify(void)
  82 {
  83         /*
  84          * To check for production board vs beta board,
  85          * check if gpio 94 is clear.
  86          *
  87          * No way yet to check for alpha board identity.
  88          * Alpha boards were produced in very limited quantities
  89          * and they are not commonly used.  They are mentioned here
  90          * only for completeness.
  91          */
  92         if (!omap_request_gpio(94)) {
  93                 unsigned int val;
  94
  95                 omap_set_gpio_direction(94, 1);
  96                 val = omap_get_gpio_datain(94);
  97                 omap_free_gpio(94);
  98
  99                 if (val)
 100                         revision = ZOOM2_REVISION_BETA;
 101                 else
 102                         revision = ZOOM2_REVISION_PRODUCTION;
 103         }
 104
 105         printf("Board revision ");
 106         switch (revision) {
 107         case ZOOM2_REVISION_PRODUCTION:
 108                 printf("Production\n");
 109                 break;
 110         case ZOOM2_REVISION_BETA:
 111                 printf("Beta\n");
 112                 break;
 113         default:
 114                 printf("Unknown\n");
 115                 break;
 116         }
 117 }
 118
 119 /*
 120  * Routine: board_init
 121  * Description: Early hardware init.
 122  */
 123 int board_init (void)
 124 {
 125         DECLARE_GLOBAL_DATA_PTR;
 126         u32 *gpmc_config;
 127
 128         gpmc_init ();           /* in SRAM or SDRAM, finish GPMC */
 129
 130         /* Configure console support on zoom2 */
 131         gpmc_config = gpmc_serial_TL16CP754C;
 132         enable_gpmc_cs_config(gpmc_config, &gpmc_cfg->cs[4],
 133                         SERIAL_TL16CP754C_BASE, GPMC_SIZE_16M);
 134
 135         /* board id for Linux */
 136         gd->bd->bi_arch_number = MACH_TYPE_OMAP_ZOOM2;
 137         /* boot param addr */
 138         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
 139
 140 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
 141         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
 142 #endif
 143         return 0;
 144 }
 145
 146 /*
 147  * Routine: misc_init_r
 148  * Description: Configure zoom board specific configurations
 149  */
 150 int misc_init_r(void)
 151 {
 152         zoom2_identify();
 153         twl4030_power_init();
 154         twl4030_led_init();
 155         dieid_num_r();
 156
 157         /*
 158          * Board Reset
 159          * The board is reset by holding the the large button
 160          * on the top right side of the main board for
 161          * eight seconds.
 162          *
 163          * There are reported problems of some beta boards
 164          * continously resetting.  For those boards, disable resetting.
 165          */
 166         if (ZOOM2_REVISION_PRODUCTION <= zoom2_get_revision())
 167                 twl4030_power_reset_init();
 168
 169         return 0;
 170 }
 171
 172 /*
 173  * Routine: set_muxconf_regs
 174  * Description: Setting up the configuration Mux registers specific to the
 175  *              hardware. Many pins need to be moved from protect to primary
 176  *              mode.
 177  */
 178 void set_muxconf_regs (void)
 179 {
 180         /* platform specific muxes */
 181         MUX_ZOOM2 ();
 182 }