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  * SPDX-License-Identifier:     GPL-2.0+
  15  */
  16 #include <common.h>
  17 #include <twl4030.h>
  18 #include <asm/io.h>
  19 #include <asm/gpio.h>
  20 #include <asm/arch/mmc_host_def.h>
  21 #include <asm/arch/mux.h>
  22 #include <asm/arch/gpio.h>
  23 #include <asm/arch/sys_proto.h>
  24 #include <asm/mach-types.h>
  25 #include "pandora.h"
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 #define TWL4030_BB_CFG_BBCHEN           (1 << 4)
  30 #define TWL4030_BB_CFG_BBSEL_3200MV     (3 << 2)
  31 #define TWL4030_BB_CFG_BBISEL_500UA     2
  32
  33 #define CONTROL_WKUP_CTRL               0x48002a5c
  34 #define GPIO_IO_PWRDNZ                  (1 << 6)
  35 #define PBIASLITEVMODE1                 (1 << 8)
  36
  37 /*
  38  * Routine: board_init
  39  * Description: Early hardware init.
  40  */
  41 int board_init(void)
  42 {
  43         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  44         /* board id for Linux */
  45         gd->bd->bi_arch_number = MACH_TYPE_OMAP3_PANDORA;
  46         /* boot param addr */
  47         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  48
  49         return 0;
  50 }
  51
  52 static void set_output_gpio(unsigned int gpio, int value)
  53 {
  54         int ret;
  55
  56         ret = gpio_request(gpio, "");
  57         if (ret != 0) {
  58                 printf("could not request GPIO %u\n", gpio);
  59                 return;
  60         }
  61         ret = gpio_direction_output(gpio, value);
  62         if (ret != 0)
  63                 printf("could not set GPIO %u to %d\n", gpio, value);
  64 }
  65
  66 /*
  67  * Routine: misc_init_r
  68  * Description: Configure board specific parts
  69  */
  70 int misc_init_r(void)
  71 {
  72         t2_t *t2_base = (t2_t *)T2_BASE;
  73         u32 pbias_lite;
  74
  75         twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
  76
  77         /* set up dual-voltage GPIOs to 1.8V */
  78         pbias_lite = readl(&t2_base->pbias_lite);
  79         pbias_lite &= ~PBIASLITEVMODE1;
  80         pbias_lite |= PBIASLITEPWRDNZ1;
  81         writel(pbias_lite, &t2_base->pbias_lite);
  82         if (get_cpu_family() == CPU_OMAP36XX)
  83                 writel(readl(CONTROL_WKUP_CTRL) | GPIO_IO_PWRDNZ,
  84                         CONTROL_WKUP_CTRL);
  85
  86         /* make sure audio and BT chips are in powerdown state */
  87         set_output_gpio(14, 0);
  88         set_output_gpio(15, 0);
  89         set_output_gpio(118, 0);
  90
  91         /* enable USB supply */
  92         set_output_gpio(164, 1);
  93
  94         /* wifi needs a short pulse to enter powersave state */
  95         set_output_gpio(23, 1);
  96         udelay(5000);
  97         gpio_direction_output(23, 0);
  98
  99         /* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
 100         twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
 101                 TWL4030_PM_RECEIVER_BB_CFG,
 102                 TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV |
 103                 TWL4030_BB_CFG_BBISEL_500UA);
 104
 105         dieid_num_r();
 106
 107         return 0;
 108 }
 109
 110 /*
 111  * Routine: set_muxconf_regs
 112  * Description: Setting up the configuration Mux registers specific to the
 113  *              hardware. Many pins need to be moved from protect to primary
 114  *              mode.
 115  */
 116 void set_muxconf_regs(void)
 117 {
 118         MUX_PANDORA();
 119         if (get_cpu_family() == CPU_OMAP36XX) {
 120                 MUX_PANDORA_3730();
 121         }
 122 }
 123
 124 #ifdef CONFIG_GENERIC_MMC
 125 int board_mmc_init(bd_t *bis)
 126 {
 127         return omap_mmc_init(0, 0, 0, -1, -1);
 128 }
 129 #endif