src/mainboard/ibm/sbp1/bootblock.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <device/pci_def.h>
   5 #include <device/pci_ops.h>
   6 #include <intelblocks/lpc_lib.h>
   7 #include <intelblocks/pcr.h>
   8 #include <soc/intel/common/block/lpc/lpc_def.h>
   9 #include <soc/pci_devs.h>
  10 #include <soc/pcr_ids.h>
  11
  12 #define PCR_DMI_LPCIOD  0x2770
  13 #define PCR_DMI_LPCIOE  0x2774
  14
  15 void bootblock_mainboard_early_init(void)
  16 {
  17         uint16_t lpciod = LPC_IOD_COMA_RANGE;
  18         uint16_t lpcioe = LPC_IOE_COMA_EN;
  19
  20         /* Open IO windows: 0x3f8 for com1 */
  21         pcr_or32(PID_DMI, PCR_DMI_LPCIOD, lpciod);
  22         /* LPC I/O enable: com1 */
  23         pcr_or32(PID_DMI, PCR_DMI_LPCIOE, lpcioe);
  24
  25         /* Enable com1 (0x3f8) */
  26         pci_write_config16(PCH_DEV_LPC, LPC_IO_DECODE, lpciod);
  27         pci_write_config16(PCH_DEV_LPC, LPC_IO_ENABLES, lpcioe);
  28 }