LXR uboot/board/davinci/dvevm/dvevm.c

   1/*
   2 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   3 *
   4 * Parts are shamelessly stolen from various TI sources, original copyright
   5 * follows:
   6 * -----------------------------------------------------------------
   7 *
   8 * Copyright (C) 2004 Texas Instruments.
   9 *
  10 * ----------------------------------------------------------------------------
  11 * SPDX-License-Identifier:     GPL-2.0+
  12 * ----------------------------------------------------------------------------
  13 */
  14
  15#include <common.h>
  16#include <i2c.h>
  17#include <asm/arch/hardware.h>
  18#include <asm/arch/davinci_misc.h>
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22int board_init(void)
  23{
  24        /* arch number of the board */
  25        gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_EVM;
  26
  27        /* address of boot parameters */
  28        gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
  29
  30        /* Configure AEMIF pins (although this should be configured at boot time
  31         * with pull-up/pull-down resistors) */
  32        REG(PINMUX0) = 0x00000c1f;
  33
  34        davinci_errata_workarounds();
  35
  36        /* Power on required peripherals */
  37        lpsc_on(DAVINCI_LPSC_GPIO);
  38        lpsc_on(DAVINCI_LPSC_USB);
  39
  40#if !defined(CONFIG_SYS_USE_DSPLINK)
  41        /* Powerup the DSP */
  42        dsp_on();
  43#endif /* CONFIG_SYS_USE_DSPLINK */
  44
  45        davinci_enable_uart0();
  46        davinci_enable_emac();
  47        davinci_enable_i2c();
  48
  49        lpsc_on(DAVINCI_LPSC_TIMER1);
  50        timer_init();
  51
  52        return(0);
  53}
  54
  55int misc_init_r(void)
  56{
  57        uint8_t video_mode;
  58        uint8_t eeprom_enetaddr[6];
  59
  60        /* Read Ethernet MAC address from EEPROM if available. */
  61        if (dvevm_read_mac_address(eeprom_enetaddr))
  62                davinci_sync_env_enetaddr(eeprom_enetaddr);
  63
  64        i2c_read(0x39, 0x00, 1, &video_mode, 1);
  65
  66        setenv("videostd", ((video_mode & 0x80) ? "pal" : "ntsc"));
  67
  68        return(0);
  69}
  70
  71#ifdef CONFIG_USB_DAVINCI
  72
  73/* IO Expander I2C address and USB VBUS enable mask */
  74#define IOEXP_I2C_ADDR 0x3A
  75#define IOEXP_VBUSEN_MASK 1
  76
  77/*
  78 * This function enables USB VBUS by writting to IO expander using I2C.
  79 * Note that the I2C is already initialized at this stage. This
  80 * function is used by davinci specific USB wrapper code.
  81 */
  82void enable_vbus(void)
  83{
  84        uchar data;  /* IO Expander data to enable VBUS */
  85
  86        /* Write to IO expander to enable VBUS */
  87        i2c_read(IOEXP_I2C_ADDR, 0, 0, &data, 1);
  88        data &= ~IOEXP_VBUSEN_MASK;
  89        i2c_write(IOEXP_I2C_ADDR, 0, 0, &data, 1);
  90}
  91#endif
  92