From 780935687d74f89a25a9c58952314be6af61c348 Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Tue, 11 Nov 2014 17:22:23 +0200 Subject: pcengines/apu1: Implement board GPIOs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some GPIO pins are shared with (disabled) PCI bridge 0:14.4. As our PCI subsystem currently does not configure PCI bridges that are marked disabled, but remain visible in the hardware, we cannot mark 0:14.4 disabled in devicetree just yet. Change-Id: Ibc5d950662d633a07d62fd5a5984a56d8e5f959d Signed-off-by: Kyösti Mälkki Reviewed-on: http://review.coreboot.org/8326 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc --- src/mainboard/pcengines/apu1/romstage.c | 41 +++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'src/mainboard/pcengines/apu1/romstage.c') diff --git a/src/mainboard/pcengines/apu1/romstage.c b/src/mainboard/pcengines/apu1/romstage.c index c555536770..e9b940020c 100644 --- a/src/mainboard/pcengines/apu1/romstage.c +++ b/src/mainboard/pcengines/apu1/romstage.c @@ -2,6 +2,8 @@ * This file is part of the coreboot project. * * Copyright (C) 2011 Advanced Micro Devices, Inc. + * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC + * Copyright (C) 2014 Kyösti Mälkki * * 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 @@ -32,6 +34,7 @@ #include #include #include +#include #include #include #include @@ -41,10 +44,13 @@ #include #include #include +#include "gpio_ftns.h" #define SIO_PORT 0x2e #define SERIAL_DEV PNP_DEV(SIO_PORT, NCT5104D_SP1) +static void early_lpc_init(void); + void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) { u32 val; @@ -64,6 +70,8 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) if (!cpu_init_detectedx && boot_cpu()) { post_code(0x30); sb_Poweron_Init(); + early_lpc_init(); + post_code(0x31); nuvoton_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE); @@ -112,3 +120,36 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) post_code(0x54); /* Should never see this post code. */ } + +static void early_lpc_init(void) +{ + u32 mmio_base; + + /* PC Engines requires system boot when power is applied. This feature is + * controlled in PM_REG 5Bh register. "Always Power On" works by writing a + * value of 05h. + */ + u8 bdata = pm_ioread(SB_PMIOA_REG5B); + bdata &= 0xf8; //clear bits 0-2 + bdata |= 0x05; //set bits 0,2 + pm_iowrite(SB_PMIOA_REG5B, bdata); + + /* Multi-function pins switch to GPIO0-35, these pins are shared with PCI pins */ + bdata = pm_ioread(SB_PMIOA_REGEA); + bdata &= 0xfe; //clear bit 0 + bdata |= 0x01; //set bit 0 + pm_iowrite(SB_PMIOA_REGEA, bdata); + + //configure required GPIOs + mmio_base = find_gpio_base(); + configure_gpio(mmio_base, GPIO_10, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_HIGH); + configure_gpio(mmio_base, GPIO_11, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_HIGH); + configure_gpio(mmio_base, GPIO_15, GPIO_FTN_1, GPIO_INPUT); + configure_gpio(mmio_base, GPIO_16, GPIO_FTN_1, GPIO_INPUT); + configure_gpio(mmio_base, GPIO_17, GPIO_FTN_1, GPIO_INPUT); + configure_gpio(mmio_base, GPIO_18, GPIO_FTN_1, GPIO_INPUT); + configure_gpio(mmio_base, GPIO_187, GPIO_FTN_1, GPIO_INPUT); + configure_gpio(mmio_base, GPIO_189, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW); + configure_gpio(mmio_base, GPIO_190, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW); + configure_gpio(mmio_base, GPIO_191, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_LOW); +} -- cgit v1.2.3