board/pandora/pandora.c

   1 /*
   2  * (C) Copyright 2008
   3  * Grazvydas Ignotas <notasas@gmail.com>
   4  *
   5  * Derived from Beagle Board, 3430 SDP, and OMAP3EVM code by
   6  *      Richard Woodruff <r-woodruff2@ti.com>
   7  *      Syed Mohammed Khasim <khasim@ti.com>
   8  *      Sunil Kumar <sunilsaini05@gmail.com>
   9  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
  10  *
  11  * (C) Copyright 2004-2008
  12  * Texas Instruments, <www.ti.com>
  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 #include <twl4030.h>
  34 #include <asm/io.h>
  35 #include <asm/gpio.h>
  36 #include <asm/arch/mmc_host_def.h>
  37 #include <asm/arch/mux.h>
  38 #include <asm/arch/gpio.h>
  39 #include <asm/arch/sys_proto.h>
  40 #include <asm/mach-types.h>
  41 #include "pandora.h"
  42
  43 DECLARE_GLOBAL_DATA_PTR;
  44
  45 #define TWL4030_BB_CFG_BBCHEN           (1 << 4)
  46 #define TWL4030_BB_CFG_BBSEL_3200MV     (3 << 2)
  47 #define TWL4030_BB_CFG_BBISEL_500UA     2
  48
  49 #define CONTROL_WKUP_CTRL               0x48002a5c
  50 #define GPIO_IO_PWRDNZ                  (1 << 6)
  51 #define PBIASLITEVMODE1                 (1 << 8)
  52
  53 /*
  54  * Routine: board_init
  55  * Description: Early hardware init.
  56  */
  57 int board_init(void)
  58 {
  59         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  60         /* board id for Linux */
  61         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_PANDORA;
  62         /* boot param addr */
  63         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  64
  65         return 0;
  66 }
  67
  68 static void set_output_gpio(unsigned int gpio, int value)
  69 {
  70         int ret;
  71
  72         ret = gpio_request(gpio, "");
  73         if (ret != 0) {
  74                 printf("could not request GPIO %u\n", gpio);
  75                 return;
  76         }
  77         ret = gpio_direction_output(gpio, value);
  78         if (ret != 0)
  79                 printf("could not set GPIO %u to %d\n", gpio, value);
  80 }
  81
  82 /*
  83  * Routine: misc_init_r
  84  * Description: Configure board specific parts
  85  */
  86 int misc_init_r(void)
  87 {
  88         t2_t *t2_base = (t2_t *)T2_BASE;
  89         u32 pbias_lite;
  90
  91         twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
  92
  93         /* set up dual-voltage GPIOs to 1.8V */
  94         pbias_lite = readl(&t2_base->pbias_lite);
  95         pbias_lite &= ~PBIASLITEVMODE1;
  96         pbias_lite |= PBIASLITEPWRDNZ1;
  97         writel(pbias_lite, &t2_base->pbias_lite);
  98         if (get_cpu_family() == CPU_OMAP36XX)
  99                 writel(readl(CONTROL_WKUP_CTRL) | GPIO_IO_PWRDNZ,
 100                         CONTROL_WKUP_CTRL);
 101
 102         /* make sure audio and BT chips are in powerdown state */
 103         set_output_gpio(14, 0);
 104         set_output_gpio(15, 0);
 105         set_output_gpio(118, 0);
 106
 107         /* enable USB supply */
 108         set_output_gpio(164, 1);
 109
 110         /* wifi needs a short pulse to enter powersave state */
 111         set_output_gpio(23, 1);
 112         udelay(5000);
 113         gpio_direction_output(23, 0);
 114
 115         /* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
 116         twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
 117                 TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV |
 118                 TWL4030_BB_CFG_BBISEL_500UA, TWL4030_PM_RECEIVER_BB_CFG);
 119
 120         dieid_num_r();
 121
 122         return 0;
 123 }
 124
 125 /*
 126  * Routine: set_muxconf_regs
 127  * Description: Setting up the configuration Mux registers specific to the
 128  *              hardware. Many pins need to be moved from protect to primary
 129  *              mode.
 130  */
 131 void set_muxconf_regs(void)
 132 {
 133         MUX_PANDORA();
 134         if (get_cpu_family() == CPU_OMAP36XX) {
 135                 MUX_PANDORA_3730();
 136         }
 137 }
 138
 139 #ifdef CONFIG_GENERIC_MMC
 140 int board_mmc_init(bd_t *bis)
 141 {
 142         omap_mmc_init(0, 0, 0);
 143         return 0;
 144 }
 145 #endif