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
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 int 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
  55 int 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  */
  82 void 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