[coreboot-gerrit] Patch set updated for coreboot: southbridge/intel/common: Add common gpio.c
Patrick Rudolph (siro@das-labor.org)
gerrit at coreboot.org
Mon Feb 15 19:49:20 CET 2016
Patrick Rudolph (siro at das-labor.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12893
-gerrit
commit 4fe7f6b6d17edeb0d9abfe18a2e5ae49ad44ea9c
Author: Patrick Rudolph <siro at das-labor.org>
Date: Sat Dec 26 08:33:16 2015 +0100
southbridge/intel/common: Add common gpio.c
Add a common southbridge gpio code to reduce existing
duplicated code.
By adding it to ram-stage, GPIOs can be changed any time,
without the need of direct register access.
The files are based on bd82x6x and lynxpoint gpio.c.
Change-Id: Iaf0c2f941f2625a5547f9cba79da1b173da6f295
Signed-off-by: Patrick Rudolph <siro at das-labor.org>
---
src/southbridge/intel/common/Kconfig | 2 +
src/southbridge/intel/common/Makefile.inc | 3 +
src/southbridge/intel/common/gpio.c | 153 ++++++++++++++++++++++++
src/southbridge/intel/common/gpio.h | 188 ++++++++++++++++++++++++++++++
4 files changed, 346 insertions(+)
diff --git a/src/southbridge/intel/common/Kconfig b/src/southbridge/intel/common/Kconfig
index 949310b..7bc686d 100644
--- a/src/southbridge/intel/common/Kconfig
+++ b/src/southbridge/intel/common/Kconfig
@@ -1,2 +1,4 @@
config SOUTHBRIDGE_INTEL_COMMON
def_bool n
+config SOUTHBRIDGE_INTEL_COMMON_GPIO
+ def_bool n
diff --git a/src/southbridge/intel/common/Makefile.inc b/src/southbridge/intel/common/Makefile.inc
index 513f288..56ba56f 100644
--- a/src/southbridge/intel/common/Makefile.inc
+++ b/src/southbridge/intel/common/Makefile.inc
@@ -21,4 +21,7 @@ ifeq ($(CONFIG_SOUTHBRIDGE_INTEL_COMMON),y)
romstage-$(CONFIG_USBDEBUG_IN_ROMSTAGE) += usb_debug.c
ramstage-$(CONFIG_USBDEBUG) += usb_debug.c
+romstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_GPIO) += gpio.c
+ramstage-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_GPIO) += gpio.c
+smm-$(CONFIG_SOUTHBRIDGE_INTEL_COMMON_GPIO) += gpio.c
endif
diff --git a/src/southbridge/intel/common/gpio.c b/src/southbridge/intel/common/gpio.c
new file mode 100644
index 0000000..aadd519
--- /dev/null
+++ b/src/southbridge/intel/common/gpio.c
@@ -0,0 +1,153 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011-2016 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <arch/io.h>
+#include <device/device.h>
+#include <device/pci.h>
+
+#include "gpio.h"
+
+#define MAX_GPIO_NUMBER 75 /* zero based */
+
+static u16 get_gpio_base(void)
+{
+#if defined(__PRE_RAM__) || defined(__SMM__)
+ return pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
+#else
+ return pci_read_config16(dev_find_slot(0, PCI_DEVFN(0x1f, 0)),
+ GPIO_BASE) & 0xfffc;
+#endif
+}
+
+void setup_pch_gpios(const struct pch_gpio_map *gpio)
+{
+ u16 gpiobase = get_gpio_base();
+
+ /* 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);
+}
+
+/*
+ * return current gpio level.
+ */
+int get_gpio(int gpio_num)
+{
+ static const int gpio_reg_offsets[] = {GP_LVL, GP_LVL2, GP_LVL3};
+ u16 gpio_base = get_gpio_base();
+ 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;
+}
+
+/*
+ * 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;
+}
+
+/*
+ * set gpio output to level.
+ */
+void set_gpio(int gpio_num, int value)
+{
+ static const int gpio_reg_offsets[] = {
+ GP_LVL, GP_LVL2, GP_LVL3
+ };
+ u16 gpio_base = get_gpio_base();
+ int index, bit;
+ u32 config;
+
+ if (gpio_num > MAX_GPIO_NUMBER)
+ return; /* Just ignore wrong gpio numbers. */
+
+ index = gpio_num / 32;
+ bit = gpio_num % 32;
+
+ config = inl(gpio_base + gpio_reg_offsets[index]);
+ config &= ~(1 << bit);
+ config |= value << bit;
+ outl(config, gpio_base + gpio_reg_offsets[index]);
+}
+
+int gpio_is_native(int gpio_num)
+{
+ static const int gpio_reg_offsets[] = {
+ GPIO_USE_SEL, GPIO_USE_SEL2, GPIO_USE_SEL3
+ };
+ u16 gpio_base = get_gpio_base();
+ int index, bit;
+ u32 config;
+
+ if (gpio_num > MAX_GPIO_NUMBER)
+ return 0; /* Just ignore wrong gpio numbers. */
+
+ index = gpio_num / 32;
+ bit = gpio_num % 32;
+
+ config = inl(gpio_base + gpio_reg_offsets[index]);
+ return !(config & (1 << bit));
+}
diff --git a/src/southbridge/intel/common/gpio.h b/src/southbridge/intel/common/gpio.h
new file mode 100644
index 0000000..7b42b06
--- /dev/null
+++ b/src/southbridge/intel/common/gpio.h
@@ -0,0 +1,188 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011-2016 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef INTEL_COMMON_GPIO_H
+#define INTEL_COMMON_GPIO_H
+
+#include <stdint.h>
+
+/* LPC GPIO Base Address Register */
+#define GPIO_BASE 0x48
+/* PCI Configuration Space (D31:F0): LPC */
+#define PCH_LPC_DEV PCI_DEV(0, 0x1f, 0)
+
+/* ICH7 GPIOBASE */
+#define GPIO_USE_SEL 0x00
+#define GP_IO_SEL 0x04
+#define GP_LVL 0x0c
+#define GPO_BLINK 0x18
+#define GPI_INV 0x2c
+#define GPIO_USE_SEL2 0x30
+#define GP_IO_SEL2 0x34
+#define GP_LVL2 0x38
+#define GPIO_USE_SEL3 0x40
+#define GP_IO_SEL3 0x44
+#define GP_LVL3 0x48
+#define GP_RST_SEL1 0x60
+#define GP_RST_SEL2 0x64
+#define GP_RST_SEL3 0x68
+
+#define GPIO_MODE_NATIVE 0
+#define GPIO_MODE_GPIO 1
+#define GPIO_MODE_NONE 1
+
+#define GPIO_DIR_OUTPUT 0
+#define GPIO_DIR_INPUT 1
+
+#define GPIO_NO_INVERT 0
+#define GPIO_INVERT 1
+
+#define GPIO_LEVEL_LOW 0
+#define GPIO_LEVEL_HIGH 1
+
+#define GPIO_NO_BLINK 0
+#define GPIO_BLINK 1
+
+#define GPIO_RESET_PWROK 0
+#define GPIO_RESET_RSMRST 1
+
+struct pch_gpio_set1 {
+ u32 gpio0 : 1;
+ u32 gpio1 : 1;
+ u32 gpio2 : 1;
+ u32 gpio3 : 1;
+ u32 gpio4 : 1;
+ u32 gpio5 : 1;
+ u32 gpio6 : 1;
+ u32 gpio7 : 1;
+ u32 gpio8 : 1;
+ u32 gpio9 : 1;
+ u32 gpio10 : 1;
+ u32 gpio11 : 1;
+ u32 gpio12 : 1;
+ u32 gpio13 : 1;
+ u32 gpio14 : 1;
+ u32 gpio15 : 1;
+ u32 gpio16 : 1;
+ u32 gpio17 : 1;
+ u32 gpio18 : 1;
+ u32 gpio19 : 1;
+ u32 gpio20 : 1;
+ u32 gpio21 : 1;
+ u32 gpio22 : 1;
+ u32 gpio23 : 1;
+ u32 gpio24 : 1;
+ u32 gpio25 : 1;
+ u32 gpio26 : 1;
+ u32 gpio27 : 1;
+ u32 gpio28 : 1;
+ u32 gpio29 : 1;
+ u32 gpio30 : 1;
+ u32 gpio31 : 1;
+} __attribute__ ((packed));
+
+struct pch_gpio_set2 {
+ u32 gpio32 : 1;
+ u32 gpio33 : 1;
+ u32 gpio34 : 1;
+ u32 gpio35 : 1;
+ u32 gpio36 : 1;
+ u32 gpio37 : 1;
+ u32 gpio38 : 1;
+ u32 gpio39 : 1;
+ u32 gpio40 : 1;
+ u32 gpio41 : 1;
+ u32 gpio42 : 1;
+ u32 gpio43 : 1;
+ u32 gpio44 : 1;
+ u32 gpio45 : 1;
+ u32 gpio46 : 1;
+ u32 gpio47 : 1;
+ u32 gpio48 : 1;
+ u32 gpio49 : 1;
+ u32 gpio50 : 1;
+ u32 gpio51 : 1;
+ u32 gpio52 : 1;
+ u32 gpio53 : 1;
+ u32 gpio54 : 1;
+ u32 gpio55 : 1;
+ u32 gpio56 : 1;
+ u32 gpio57 : 1;
+ u32 gpio58 : 1;
+ u32 gpio59 : 1;
+ u32 gpio60 : 1;
+ u32 gpio61 : 1;
+ u32 gpio62 : 1;
+ u32 gpio63 : 1;
+} __attribute__ ((packed));
+
+struct pch_gpio_set3 {
+ u32 gpio64 : 1;
+ u32 gpio65 : 1;
+ u32 gpio66 : 1;
+ u32 gpio67 : 1;
+ u32 gpio68 : 1;
+ u32 gpio69 : 1;
+ u32 gpio70 : 1;
+ u32 gpio71 : 1;
+ u32 gpio72 : 1;
+ u32 gpio73 : 1;
+ u32 gpio74 : 1;
+ u32 gpio75 : 1;
+} __attribute__ ((packed));
+
+struct pch_gpio_map {
+ struct {
+ const struct pch_gpio_set1 *mode;
+ const struct pch_gpio_set1 *direction;
+ const struct pch_gpio_set1 *level;
+ const struct pch_gpio_set1 *reset;
+ const struct pch_gpio_set1 *invert;
+ const struct pch_gpio_set1 *blink;
+ } set1;
+ struct {
+ const struct pch_gpio_set2 *mode;
+ const struct pch_gpio_set2 *direction;
+ const struct pch_gpio_set2 *level;
+ const struct pch_gpio_set2 *reset;
+ } set2;
+ struct {
+ const struct pch_gpio_set3 *mode;
+ const struct pch_gpio_set3 *direction;
+ const struct pch_gpio_set3 *level;
+ const struct pch_gpio_set3 *reset;
+ } set3;
+};
+
+extern const struct pch_gpio_map mainboard_gpio_map;
+
+/* Configure GPIOs with mainboard provided settings */
+void setup_pch_gpios(const struct pch_gpio_map *gpio);
+
+/* get GPIO pin value */
+int get_gpio(int gpio_num);
+/*
+ * 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);
+
+void set_gpio(int gpio_num, int value);
+
+void clear_gpio(int gpio_num);
+
+int gpio_is_native(int gpio_num);
+
+#endif
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