src/mainboard/intel/strago/com_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <device/mmio.h>
   5 #include <device/pci_ops.h>
   6 #include <soc/gpio.h>
   7 #include <soc/lpc.h>
   8 #include <soc/pci_devs.h>
   9
  10 /*
  11  * return family number and internal pad number in that community
  12  * by pad number and which community it is in.
  13  */
  14
  15         /* family number in high byte and inner pad number in lowest byte */
  16
  17 void bootblock_mainboard_early_init(void)
  18 {
  19         uint32_t reg;
  20         uint32_t *pad_config_reg;
  21
  22         /* Enable the UART hardware for COM1. */
  23         reg = 1;
  24         pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg);
  25
  26         /*
  27          * Set up the pads to select the UART function
  28          * AD12 SW16(UART1_DATAIN/UART0_DATAIN)   - Setting Mode 2 for UART0_RXD
  29          * AD10 SW20(UART1_DATAOUT/UART0_DATAOUT) - Setting Mode 2 for UART0_TXD
  30          */
  31         pad_config_reg = gpio_pad_config_reg(GP_SOUTHWEST, UART1_RXD_PAD);
  32         write32(pad_config_reg, SET_PAD_MODE_SELECTION(PAD_CONFIG0_DEFAULT0,
  33                 M2));
  34
  35         pad_config_reg = gpio_pad_config_reg(GP_SOUTHWEST, UART1_TXD_PAD);
  36         write32(pad_config_reg, SET_PAD_MODE_SELECTION(PAD_CONFIG0_DEFAULT0,
  37                 M2));
  38 }