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 <asm/io.h>
  36 #include <asm/arch/gpio.h>
  37 #include <asm/arch/mem.h>
  38 #include <asm/arch/mux.h>
  39 #include <asm/arch/sys_proto.h>
  40 #include <asm/mach-types.h>
  41 #include "zoom2.h"
  42 #include "zoom2_serial.h"
  43
  44 /*
  45  * This the the zoom2, board specific, gpmc configuration for the
  46  * quad uart on the debug board.   The more general gpmc configurations
  47  * are setup at the cpu level in cpu/arm_cortexa8/omap3/mem.c
  48  *
  49  * The details of the setting of the serial gpmc setup are not available.
  50  * The values were provided by another party.
  51  */
  52 extern void enable_gpmc_config(u32 *gpmc_config, gpmc_csx_t *gpmc_cs_base,
  53                                u32 base, u32 size);
  54
  55 static u32 gpmc_serial_TL16CP754C[GPMC_MAX_REG] = {
  56         0x00011000,
  57         0x001F1F01,
  58         0x00080803,
  59         0x1D091D09,
  60         0x041D1F1F,
  61         0x1D0904C4, 0
  62 };
  63
  64 /* Used to track the revision of the board */
  65 static zoom2_revision revision = ZOOM2_REVISION_UNKNOWN;
  66
  67 /*
  68  * Routine: zoom2_get_revision
  69  * Description: Return the revision of the Zoom2 this code is running on.
  70  */
  71 zoom2_revision zoom2_get_revision(void)
  72 {
  73         return revision;
  74 }
  75
  76 /*
  77  * Routine: zoom2_identify
  78  * Description: Detect which version of Zoom2 we are running on.
  79  */
  80 void zoom2_identify(void)
  81 {
  82         /*
  83          * To check for production board vs beta board,
  84          * check if gpio 94 is clear.
  85          *
  86          * No way yet to check for alpha board identity.
  87          * Alpha boards were produced in very limited quantities
  88          * and they are not commonly used.  They are mentioned here
  89          * only for completeness.
  90          */
  91         if (!omap_request_gpio(94)) {
  92                 unsigned int val;
  93
  94                 omap_set_gpio_direction(94, 1);
  95                 val = omap_get_gpio_datain(94);
  96                 omap_free_gpio(94);
  97
  98                 if (val)
  99                         revision = ZOOM2_REVISION_BETA;
 100                 else
 101                         revision = ZOOM2_REVISION_PRODUCTION;
 102         }
 103
 104         printf("Board revision ");
 105         switch (revision) {
 106         case ZOOM2_REVISION_PRODUCTION:
 107                 printf("Production\n");
 108                 break;
 109         case ZOOM2_REVISION_BETA:
 110                 printf("Beta\n");
 111                 break;
 112         default:
 113                 printf("Unknown\n");
 114                 break;
 115         }
 116 }
 117
 118 /*
 119  * Routine: board_init
 120  * Description: Early hardware init.
 121  */
 122 int board_init (void)
 123 {
 124         DECLARE_GLOBAL_DATA_PTR;
 125         gpmc_csx_t *serial_cs_base;
 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         serial_cs_base = (gpmc_csx_t *) (GPMC_CONFIG_CS0_BASE +
 133                                          (3 * GPMC_CONFIG_WIDTH));
 134         enable_gpmc_config(gpmc_config,
 135                            serial_cs_base,
 136                            SERIAL_TL16CP754C_BASE,
 137                            GPMC_SIZE_16M);
 138
 139         /* board id for Linux */
 140         gd->bd->bi_arch_number = MACH_TYPE_OMAP_ZOOM2;
 141         /* boot param addr */
 142         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
 143
 144 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
 145         status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
 146 #endif
 147         return 0;
 148 }
 149
 150 /*
 151  * Routine: misc_init_r
 152  * Description: Configure zoom board specific configurations
 153  */
 154 int misc_init_r(void)
 155 {
 156         zoom2_identify();
 157         power_init_r();
 158         dieid_num_r();
 159         return 0;
 160 }
 161
 162 /*
 163  * Routine: set_muxconf_regs
 164  * Description: Setting up the configuration Mux registers specific to the
 165  *              hardware. Many pins need to be moved from protect to primary
 166  *              mode.
 167  */
 168 void set_muxconf_regs (void)
 169 {
 170         /* platform specific muxes */
 171         MUX_ZOOM2 ();
 172 }