pcengines/apu1: Implement board GPIOs

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 <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8326
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/mainboard/pcengines/apu1/BiosCallOuts.c

@@ -24,6 +24,7 @@
 #include "heapManager.h"
 #include "SB800.h"
 #include <stdlib.h>
+#include "gpio_ftns.h"
 
 static AGESA_STATUS board_BeforeDramInit (UINT32 Func, UINT32 Data, VOID *ConfigPtr);
 static AGESA_STATUS board_ReadSpd_from_cbfs(UINT32 Func, UINT32 Data, VOID *ConfigPtr);
@@ -59,7 +60,7 @@ static AGESA_STATUS board_ReadSpd_from_cbfs(UINT32 Func, UINT32 Data, VOID *Conf
 	AGESA_STATUS Status = AGESA_UNSUPPORTED;
 #ifdef __PRE_RAM__
 	AGESA_READ_SPD_PARAMS *info = ConfigPtr;
-	u8 index = 0;
+	u8 index = get_spd_offset();
 
 	if (info->MemChannelId > 0)
 		return AGESA_UNSUPPORTED;

src/mainboard/pcengines/apu1/Makefile.inc

@@ -28,10 +28,12 @@ endif
 romstage-y += buildOpts.c
 romstage-y += BiosCallOuts.c
 romstage-y += PlatformGnbPcie.c
+romstage-y += gpio_ftns.c
 
 ramstage-y += buildOpts.c
 ramstage-y += BiosCallOuts.c
 ramstage-y += PlatformGnbPcie.c
+ramstage-y += gpio_ftns.c
 
 ## DIMM SPD for on-board memory
 SPD_BIN = $(obj)/spd.bin

src/mainboard/pcengines/apu1/devicetree.cb

@@ -87,6 +87,7 @@ chip northbridge/amd/agesa/family14/root_complex
 				device pci 16.0 on end # OHCI USB 10-13
 				device pci 16.2 on end # EHCI USB 10-13
 				register "gpp_configuration" = "0"
+				register "disconnect_pcib" = "1"
 				register "boot_switch_sata_ide" = "0"	# 0: boot from SATA. 1: IDE
 			end	#southbridge/amd/cimx/sb800
 #			end #  device pci 18.0

src/mainboard/pcengines/apu1/gpio_ftns.c

@@ -0,0 +1,68 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Sage Electronic Engineering, LLC
+ *
+ * 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 <stdint.h>
+#include <arch/io.h>
+#include "SBPLATFORM.h"
+#include <southbridge/amd/cimx/cimx_util.h>
+#include "gpio_ftns.h"
+
+u32 find_gpio_base(void)
+{
+	u8 pm_index, pm_data;
+	u32 base_addr = 0;
+
+	/* Find the ACPImmioAddr base address */
+	for ( pm_index = 0x27; pm_index > 0x23; pm_index-- ) {
+		outb( pm_index, PM_INDEX );
+		pm_data = inb( PM_DATA );
+		base_addr <<= 8;
+		base_addr |= (u32)pm_data;
+	}
+	base_addr &= 0xFFFFF000;
+	return (base_addr);
+}
+
+void configure_gpio(u32 base_addr, u32 gpio, u8 iomux_ftn, u8 setting)
+{
+	u8 bdata;
+	u8 *memptr;
+
+	memptr = (u8 *)(base_addr + IOMUX_OFFSET + gpio);
+	*memptr = iomux_ftn;
+
+	memptr = (u8 *)(base_addr + GPIO_OFFSET + gpio);
+	bdata = *memptr;
+	bdata &= 0x07;
+	bdata |= setting; /* set direction and data value */
+	*memptr = bdata;
+}
+
+u8 read_gpio(u32 base_addr, u32 gpio)
+{
+	u8 *memptr = (u8 *)(base_addr + GPIO_OFFSET + gpio);
+	return (*memptr & GPIO_DATA_IN) ? 1 : 0;
+}
+
+int get_spd_offset(void)
+{
+	u32 base_addr = find_gpio_base();
+	u8 spd_offset = read_gpio(base_addr, GPIO_16);
+	return spd_offset;
+}

src/mainboard/pcengines/apu1/gpio_ftns.h

@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Sage Electronic Engineering, LLC
+ *
+ * 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
+ */
+
+#ifndef GPIO_FTNS_H
+#define GPIO_FTNS_H
+
+u32 find_gpio_base(void);
+void configure_gpio(u32 base_addr, u32 gpio, u8 iomux_ftn, u8 setting);
+u8 read_gpio(u32 base_addr, u32 gpio);
+int get_spd_offset(void);
+
+#define IOMUX_OFFSET    0xD00
+#define GPIO_OFFSET     0x100
+#define GPIO_10         10    // PE3 Reset
+#define GPIO_11         11    // PE4 Reset
+#define GPIO_15         15    // board rev strap ms bit
+#define GPIO_16         16    // board rev strap ls bit
+#define GPIO_17         17    // TP13
+#define GPIO_18         18    // TP10
+#define GPIO_187        187   // MODESW
+#define GPIO_189        189   // LED1#
+#define GPIO_190        190   // LED2#
+#define GPIO_191        191   // LED3#
+#define GPIO_FTN_1      0x01
+#define GPIO_OUTPUT     0x08
+#define GPIO_INPUT      0x28
+#define GPIO_DATA_IN    0x80
+#define GPIO_DATA_LOW   0x00
+#define GPIO_DATA_HIGH  0x40
+
+#endif /* GPIO_FTNS_H */

src/mainboard/pcengines/apu1/mainboard.c

@@ -33,6 +33,7 @@
 #include "SBPLATFORM.h"
 #include <southbridge/amd/cimx/sb800/pci_devs.h>
 #include <northbridge/amd/agesa/family14/pci_devs.h>
+#include "gpio_ftns.h"
 
 void set_pcie_reset(void);
 void set_pcie_dereset(void);
@@ -161,6 +162,24 @@ static void mainboard_enable(device_t dev)
 	pirq_setup();
 }
 
+static void mainboard_final(void *chip_info)
+{
+	u32 mmio_base;
+
+	printk(BIOS_INFO, "Mainboard " CONFIG_MAINBOARD_PART_NUMBER " Final.\n");
+
+	/*
+	 * LED1/D7/GPIO_189 should be 0
+	 * LED2/D6/GPIO_190 should be 1
+	 * LED3/D5/GPIO_191 should be 1
+	 */
+	mmio_base = find_gpio_base();
+	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_HIGH);
+	configure_gpio(mmio_base, GPIO_191, GPIO_FTN_1, GPIO_OUTPUT | GPIO_DATA_HIGH);
+}
+
 struct chip_operations mainboard_ops = {
 	.enable_dev = mainboard_enable,
+	.final = mainboard_final,
 };

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 <kyosti.malkki@gmail.com>
  *
  * 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 <cpu/x86/mtrr.h>
 #include <cpu/amd/car.h>
 #include <northbridge/amd/agesa/agesawrapper.h>
+#include <southbridge/amd/cimx/cimx_util.h>
 #include <cpu/x86/bist.h>
 #include <cpu/x86/cache.h>
 #include <sb_cimx.h>
@@ -41,10 +44,13 @@
 #include <cpu/amd/agesa/s3_resume.h>
 #include <superio/nuvoton/common/nuvoton.h>
 #include <superio/nuvoton/nct5104d/nct5104d.h>
+#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);
+}