LXR uboot/board/omicron/calimain/calimain.c

   1/*
   2 * Copyright (C) 2011 OMICRON electronics GmbH
   3 *
   4 * Based on da850evm.c. Original Copyrights follow:
   5 *
   6 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   7 * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
   8 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   9 *
  10 * SPDX-License-Identifier:     GPL-2.0+
  11 */
  12
  13#include <common.h>
  14#include <i2c.h>
  15#include <net.h>
  16#include <netdev.h>
  17#include <watchdog.h>
  18#include <asm/io.h>
  19#include <asm/arch/hardware.h>
  20#include <asm/arch/gpio.h>
  21#include <asm/ti-common/davinci_nand.h>
  22#include <asm/arch/emac_defs.h>
  23#include <asm/arch/pinmux_defs.h>
  24#include <asm/arch/davinci_misc.h>
  25#include <asm/arch/timer_defs.h>
  26
  27DECLARE_GLOBAL_DATA_PTR;
  28
  29#define CALIMAIN_HWVERSION_MASK    0x7f000000
  30#define CALIMAIN_HWVERSION_SHIFT   24
  31
  32/* Hardware version pinmux settings */
  33const struct pinmux_config hwversion_pins[] = {
  34        { pinmux(16), 8, 2 }, /* GP7[15] */
  35        { pinmux(16), 8, 3 }, /* GP7[14] */
  36        { pinmux(16), 8, 4 }, /* GP7[13] */
  37        { pinmux(16), 8, 5 }, /* GP7[12] */
  38        { pinmux(16), 8, 6 }, /* GP7[11] */
  39        { pinmux(16), 8, 7 }, /* GP7[10] */
  40        { pinmux(17), 8, 0 }, /* GP7[9] */
  41        { pinmux(17), 8, 1 }  /* GP7[8] */
  42};
  43
  44const struct pinmux_resource pinmuxes[] = {
  45        PINMUX_ITEM(uart2_pins_txrx),
  46        PINMUX_ITEM(emac_pins_mii),
  47        PINMUX_ITEM(emac_pins_mdio),
  48        PINMUX_ITEM(emifa_pins_nor),
  49        PINMUX_ITEM(emifa_pins_cs2),
  50        PINMUX_ITEM(emifa_pins_cs3),
  51};
  52
  53const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
  54
  55const struct lpsc_resource lpsc[] = {
  56        { DAVINCI_LPSC_AEMIF }, /* NAND, NOR */
  57        { DAVINCI_LPSC_EMAC },  /* image download */
  58        { DAVINCI_LPSC_UART2 }, /* console */
  59        { DAVINCI_LPSC_GPIO },
  60};
  61
  62const int lpsc_size = ARRAY_SIZE(lpsc);
  63
  64/* read board revision from GPIO7[8..14] */
  65u32 get_board_rev(void)
  66{
  67        lpsc_on(DAVINCI_LPSC_GPIO);
  68        if (davinci_configure_pin_mux(hwversion_pins,
  69                                      ARRAY_SIZE(hwversion_pins)) != 0)
  70                return 0xffffffff;
  71
  72        return (davinci_gpio_bank67->in_data & CALIMAIN_HWVERSION_MASK)
  73                >> CALIMAIN_HWVERSION_SHIFT;
  74}
  75
  76/*
  77 * determine the oscillator frequency depending on the board revision
  78 *
  79 * rev 0x00  ... 25 MHz oscillator
  80 * rev 0x01  ... 24 MHz oscillator
  81 */
  82int calimain_get_osc_freq(void)
  83{
  84        u32 rev;
  85        int freq;
  86
  87        rev = get_board_rev();
  88        switch (rev) {
  89        case 0x00:
  90                freq = 25000000;
  91                break;
  92        default:
  93                freq = 24000000;
  94                break;
  95        }
  96        return freq;
  97}
  98
  99int board_init(void)
 100{
 101        int val;
 102
 103        irq_init();
 104
 105        /* address of boot parameters */
 106        gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 107
 108#ifdef CONFIG_DRIVER_TI_EMAC
 109        /* select emac MII mode */
 110        val = readl(&davinci_syscfg_regs->cfgchip3);
 111        val &= ~(1 << 8);
 112        writel(val, &davinci_syscfg_regs->cfgchip3);
 113#endif /* CONFIG_DRIVER_TI_EMAC */
 114
 115#ifdef CONFIG_HW_WATCHDOG
 116        davinci_hw_watchdog_enable();
 117#endif
 118
 119        printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
 120        printf("Board revision:        %d\n", get_board_rev());
 121
 122        return 0;
 123}
 124
 125#ifdef CONFIG_DRIVER_TI_EMAC
 126/*
 127 * Initializes on-board ethernet controllers.
 128 */
 129int board_eth_init(bd_t *bis)
 130{
 131        if (!davinci_emac_initialize()) {
 132                printf("Error: Ethernet init failed!\n");
 133                return -1;
 134        }
 135
 136        return 0;
 137}
 138#endif /* CONFIG_DRIVER_TI_EMAC */
 139
 140#ifdef CONFIG_HW_WATCHDOG
 141void hw_watchdog_reset(void)
 142{
 143        davinci_hw_watchdog_reset();
 144}
 145#endif
 146