From 433659ad1e864808ec30e90a62ecfd711559c5a9 Mon Sep 17 00:00:00 2001 From: Martin Roth Date: Mon, 12 May 2014 21:55:00 -0600 Subject: fsp_baytrail: Add the FSP version of Intel's Bay Trail-I chip While similar to the Bay Trail-M/D code based on the MRC, there are many differences as well: - Obviously, uses the FSP instead of the MRC binaries. - FSP does additional hardware setup, so coreboot doesn't need to. - Different microcode & microcode loading method - Uses the cache_as_ram.inc from the FSP Driver - Various other changes in support of the FSP Additional changes that don't have to to with the FSP vs MRC: - Updated IRQ Routing - Different FADT implementation. This was validated with FSP: BAYTRAIL_FSP_GOLD_002_10-JANUARY-2014.fd SHA256: d29eefbb33454bd5314bfaa38fb055d592a757de7b348ed7096cd8c2d65908a5 MD5: 9360cd915f0d3e4116bbc782233d7b91 Change-Id: Iadadf8cd6cf444ba840e0f76d3aed7825cd7aee4 Signed-off-by: Martin Roth Signed-off-by: Martin Roth Reviewed-on: http://review.coreboot.org/5791 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/soc/intel/fsp_baytrail/romstage/uart.c | 38 ++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/soc/intel/fsp_baytrail/romstage/uart.c (limited to 'src/soc/intel/fsp_baytrail/romstage/uart.c') diff --git a/src/soc/intel/fsp_baytrail/romstage/uart.c b/src/soc/intel/fsp_baytrail/romstage/uart.c new file mode 100644 index 0000000000..971067f143 --- /dev/null +++ b/src/soc/intel/fsp_baytrail/romstage/uart.c @@ -0,0 +1,38 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include + +void byt_config_com1_and_enable(void) +{ + uint32_t reg; + + /* Enable the legacy UART hardware. */ + reg = 1; + pci_write_config32(PCI_DEV(0, LPC_DEV, 0), UART_CONT, reg); + + /* Set up the pads to select the UART function */ + score_select_func(UART_RXD_PAD, 1); + score_select_func(UART_TXD_PAD, 1); +} -- cgit v1.2.3