southbridge/intel: Add FSP based i89xx southbridge support

The Intel i89xx is a communications chipset that pairs with
Sandy(Ivy)bridge processors. It has a lot in common with
the bd82x6x chipset, but fewer devices and options.

Change-Id: I11bcd1edc80f72a1b2521def9be0d1bde5789a79
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/12166
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 135 insertions, 0 deletions

diff --git a/src/southbridge/intel/fsp_i89xx/gpio.c b/src/southbridge/intel/fsp_i89xx/gpio.c
new file mode 100644
index 0000000000..f725282ea8
--- /dev/null
+++ b/src/southbridge/intel/fsp_i89xx/gpio.c
@@ -0,0 +1,135 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
+ * Copyright (C) 2013 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.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <arch/io.h>
+
+#include "pch.h"
+#include "gpio.h"
+
+#define MAX_GPIO_NUMBER 75 /* zero based */
+static const int gpio_reg_offsets[] = {GP_LVL, GP_LVL2, GP_LVL3};
+
+void setup_pch_gpios(const struct pch_gpio_map *gpio)
+{
+	u16 gpiobase = pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
+
+	/* GPIO Set 1 */
+	if (gpio->set1.level)
+		outl(*((u32*)gpio->set1.level), gpiobase + GP_LVL);
+	if (gpio->set1.mode)
+		outl(*((u32*)gpio->set1.mode), gpiobase + GPIO_USE_SEL);
+	if (gpio->set1.direction)
+		outl(*((u32*)gpio->set1.direction), gpiobase + GP_IO_SEL);
+	if (gpio->set1.reset)
+		outl(*((u32*)gpio->set1.reset), gpiobase + GP_RST_SEL1);
+	if (gpio->set1.invert)
+		outl(*((u32*)gpio->set1.invert), gpiobase + GPI_INV);
+	if (gpio->set1.blink)
+		outl(*((u32*)gpio->set1.blink), gpiobase + GPO_BLINK);
+
+	/* GPIO Set 2 */
+	if (gpio->set2.level)
+		outl(*((u32*)gpio->set2.level), gpiobase + GP_LVL2);
+	if (gpio->set2.mode)
+		outl(*((u32*)gpio->set2.mode), gpiobase + GPIO_USE_SEL2);
+	if (gpio->set2.direction)
+		outl(*((u32*)gpio->set2.direction), gpiobase + GP_IO_SEL2);
+	if (gpio->set2.reset)
+		outl(*((u32*)gpio->set2.reset), gpiobase + GP_RST_SEL2);
+
+	/* GPIO Set 3 */
+	if (gpio->set3.level)
+		outl(*((u32*)gpio->set3.level), gpiobase + GP_LVL3);
+	if (gpio->set3.mode)
+		outl(*((u32*)gpio->set3.mode), gpiobase + GPIO_USE_SEL3);
+	if (gpio->set3.direction)
+		outl(*((u32*)gpio->set3.direction), gpiobase + GP_IO_SEL3);
+	if (gpio->set3.reset)
+		outl(*((u32*)gpio->set3.reset), gpiobase + GP_RST_SEL3);
+}
+
+int get_gpio(int gpio_num)
+{
+	u16 gpio_base = pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
+	int index, bit;
+
+	if (gpio_num > MAX_GPIO_NUMBER)
+		return 0; /* Just ignore wrong gpio numbers. */
+
+	index = gpio_num / 32;
+	bit = gpio_num % 32;
+
+	return (inl(gpio_base + gpio_reg_offsets[index]) >> bit) & 1;
+}
+
+void set_gpio(int gpio_num)
+{
+	u16 gpio_base = pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
+	u32 index, bit, level;
+
+	if (gpio_num <= MAX_GPIO_NUMBER){
+
+		index = gpio_num / 32;
+		bit = gpio_num % 32;
+		level = inl(gpio_base + gpio_reg_offsets[index]);
+
+		outl((gpio_base + gpio_reg_offsets[index]), level | (1UL << bit));
+
+	}
+
+	return;
+}
+void clear_gpio(int gpio_num)
+{
+	u16 gpio_base = pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
+	u32 index, bit, level;
+
+	if (gpio_num <= MAX_GPIO_NUMBER){
+		index = gpio_num / 32;
+		bit = gpio_num % 32;
+		level = inl(gpio_base + gpio_reg_offsets[index]);
+
+		outl((gpio_base + gpio_reg_offsets[index]), level & (~(1UL << bit)));
+	}
+
+	return;
+}
+
+
+/*
+ * get a number comprised of multiple GPIO values. gpio_num_array points to
+ * the array of gpio pin numbers to scan, terminated by -1.
+ */
+unsigned get_gpios(const int *gpio_num_array)
+{
+	int gpio;
+	unsigned bitmask = 1;
+	unsigned vector = 0;
+
+	while (bitmask &&
+	       ((gpio = *gpio_num_array++) != -1)) {
+		if (get_gpio(gpio))
+			vector |= bitmask;
+		bitmask <<= 1;
+	}
+	return vector;
+}