LXR uboot/board/intel/cougarcanyon2/cougarcanyon2.c

   1/*
   2 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <errno.h>
  10#include <pci.h>
  11#include <smsc_sio1007.h>
  12#include <asm/ibmpc.h>
  13#include <asm/lpc_common.h>
  14#include <asm/pci.h>
  15#include <asm/arch/pch.h>
  16
  17#define SIO1007_RUNTIME_IOPORT  0x180
  18
  19int board_early_init_f(void)
  20{
  21        struct udevice *pch;
  22        int ret;
  23
  24        ret = uclass_first_device(UCLASS_PCH, &pch);
  25        if (ret)
  26                return ret;
  27        if (!pch)
  28                return -ENODEV;
  29
  30        /* Initialize LPC interface to turn on superio chipset decode range */
  31        dm_pci_write_config16(pch, LPC_IO_DEC, COMA_DEC_RANGE | COMB_DEC_RANGE);
  32        dm_pci_write_config16(pch, LPC_EN, KBC_LPC_EN | COMA_LPC_EN);
  33        dm_pci_write_config32(pch, LPC_GEN1_DEC, GEN_DEC_RANGE_256B |
  34                              (SIO1007_IOPORT3 & 0xff00) | GEN_DEC_RANGE_EN);
  35        dm_pci_write_config32(pch, LPC_GEN2_DEC, GEN_DEC_RANGE_16B |
  36                              SIO1007_RUNTIME_IOPORT | GEN_DEC_RANGE_EN);
  37
  38        /* Enable legacy serial port at 0x3f8 */
  39        sio1007_enable_serial(SIO1007_IOPORT3, 0, UART0_BASE, UART0_IRQ);
  40
  41        /* Enable SIO1007 runtime I/O port at 0x180 */
  42        sio1007_enable_runtime(SIO1007_IOPORT3, SIO1007_RUNTIME_IOPORT);
  43
  44        /*
  45         * On Cougar Canyon 2 board, the RS232 transiver connected to serial
  46         * port 0 (0x3f8) is controlled by a GPIO pin (GPIO10) on the SIO1007.
  47         * Set the pin value to 1 to enable the RS232 transiver.
  48         */
  49        sio1007_gpio_config(SIO1007_IOPORT3, 0, GPIO_DIR_OUTPUT,
  50                            GPIO_POL_NO_INVERT, GPIO_TYPE_PUSH_PULL);
  51        sio1007_gpio_set_value(SIO1007_RUNTIME_IOPORT, 0, 1);
  52
  53        return 0;
  54}
  55