source "drivers/platform/x86/intel/Kconfig"
-config INTEL_INT0002_VGPIO
- tristate "Intel ACPI INT0002 Virtual GPIO driver"
- depends on GPIOLIB && ACPI && PM_SLEEP
- select GPIOLIB_IRQCHIP
- help
- Some peripherals on Bay Trail and Cherry Trail platforms signal a
- Power Management Event (PME) to the Power Management Controller (PMC)
- to wakeup the system. When this happens software needs to explicitly
- clear the PME bus 0 status bit in the GPE0a_STS register to avoid an
- IRQ storm on IRQ 9.
-
- This is modelled in ACPI through the INT0002 ACPI device, which is
- called a "Virtual GPIO controller" in ACPI because it defines the
- event handler to call when the PME triggers through _AEI and _L02
- methods as would be done for a real GPIO interrupt in ACPI.
-
- To compile this driver as a module, choose M here: the module will
- be called intel_int0002_vgpio.
-
config INTEL_OAKTRAIL
tristate "Intel Oaktrail Platform Extras"
depends on ACPI
# Intel
obj-$(CONFIG_X86_PLATFORM_DRIVERS_INTEL) += intel/
-obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o
obj-$(CONFIG_INTEL_VBTN) += intel-vbtn.o
To compile this driver as a module, choose M here: the module will
be called intel_hid.
+config INTEL_INT0002_VGPIO
+ tristate "Intel ACPI INT0002 Virtual GPIO driver"
+ depends on GPIOLIB && ACPI && PM_SLEEP
+ select GPIOLIB_IRQCHIP
+ help
+ Some peripherals on Bay Trail and Cherry Trail platforms signal a
+ Power Management Event (PME) to the Power Management Controller (PMC)
+ to wakeup the system. When this happens software needs to explicitly
+ clear the PME bus 0 status bit in the GPE0a_STS register to avoid an
+ IRQ storm on IRQ 9.
+
+ This is modelled in ACPI through the INT0002 ACPI device, which is
+ called a "Virtual GPIO controller" in ACPI because it defines the
+ event handler to call when the PME triggers through _AEI and _L02
+ methods as would be done for a real GPIO interrupt in ACPI.
+
+ To compile this driver as a module, choose M here: the module will
+ be called intel_int0002_vgpio.
+
config INTEL_BXTWC_PMIC_TMU
tristate "Intel Broxton Whiskey Cove TMU Driver"
depends on INTEL_SOC_PMIC_BXTWC
intel-hid-y := hid.o
obj-$(CONFIG_INTEL_HID_EVENT) += intel-hid.o
+# Intel miscellaneous drivers
+intel_int0002_vgpio-y := int0002_vgpio.o
+obj-$(CONFIG_INTEL_INT0002_VGPIO) += intel_int0002_vgpio.o
+
# Intel PMIC / PMC / P-Unit drivers
intel_bxtwc_tmu-y := bxtwc_tmu.o
obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU) += intel_bxtwc_tmu.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel INT0002 "Virtual GPIO" driver
+ *
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Loosely based on android x86 kernel code which is:
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * Author: Dyut Kumar Sil <dyut.k.sil@intel.com>
+ *
+ * Some peripherals on Bay Trail and Cherry Trail platforms signal a Power
+ * Management Event (PME) to the Power Management Controller (PMC) to wakeup
+ * the system. When this happens software needs to clear the PME bus 0 status
+ * bit in the GPE0a_STS register to avoid an IRQ storm on IRQ 9.
+ *
+ * This is modelled in ACPI through the INT0002 ACPI device, which is
+ * called a "Virtual GPIO controller" in ACPI because it defines the event
+ * handler to call when the PME triggers through _AEI and _L02 / _E02
+ * methods as would be done for a real GPIO interrupt in ACPI. Note this
+ * is a hack to define an AML event handler for the PME while using existing
+ * ACPI mechanisms, this is not a real GPIO at all.
+ *
+ * This driver will bind to the INT0002 device, and register as a GPIO
+ * controller, letting gpiolib-acpi.c call the _L02 handler as it would
+ * for a real GPIO controller.
+ */
+
+#include <linux/acpi.h>
+#include <linux/bitmap.h>
+#include <linux/gpio/driver.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/suspend.h>
+
+#include <asm/cpu_device_id.h>
+#include <asm/intel-family.h>
+
+#define DRV_NAME "INT0002 Virtual GPIO"
+
+/* For some reason the virtual GPIO pin tied to the GPE is numbered pin 2 */
+#define GPE0A_PME_B0_VIRT_GPIO_PIN 2
+
+#define GPE0A_PME_B0_STS_BIT BIT(13)
+#define GPE0A_PME_B0_EN_BIT BIT(13)
+#define GPE0A_STS_PORT 0x420
+#define GPE0A_EN_PORT 0x428
+
+struct int0002_data {
+ struct gpio_chip chip;
+ int parent_irq;
+ int wake_enable_count;
+};
+
+/*
+ * As this is not a real GPIO at all, but just a hack to model an event in
+ * ACPI the get / set functions are dummy functions.
+ */
+
+static int int0002_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ return 0;
+}
+
+static void int0002_gpio_set(struct gpio_chip *chip, unsigned int offset,
+ int value)
+{
+}
+
+static int int0002_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ return 0;
+}
+
+static void int0002_irq_ack(struct irq_data *data)
+{
+ outl(GPE0A_PME_B0_STS_BIT, GPE0A_STS_PORT);
+}
+
+static void int0002_irq_unmask(struct irq_data *data)
+{
+ u32 gpe_en_reg;
+
+ gpe_en_reg = inl(GPE0A_EN_PORT);
+ gpe_en_reg |= GPE0A_PME_B0_EN_BIT;
+ outl(gpe_en_reg, GPE0A_EN_PORT);
+}
+
+static void int0002_irq_mask(struct irq_data *data)
+{
+ u32 gpe_en_reg;
+
+ gpe_en_reg = inl(GPE0A_EN_PORT);
+ gpe_en_reg &= ~GPE0A_PME_B0_EN_BIT;
+ outl(gpe_en_reg, GPE0A_EN_PORT);
+}
+
+static int int0002_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+ struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
+ struct int0002_data *int0002 = container_of(chip, struct int0002_data, chip);
+
+ /*
+ * Applying of the wakeup flag to our parent IRQ is delayed till system
+ * suspend, because we only want to do this when using s2idle.
+ */
+ if (on)
+ int0002->wake_enable_count++;
+ else
+ int0002->wake_enable_count--;
+
+ return 0;
+}
+
+static irqreturn_t int0002_irq(int irq, void *data)
+{
+ struct gpio_chip *chip = data;
+ u32 gpe_sts_reg;
+
+ gpe_sts_reg = inl(GPE0A_STS_PORT);
+ if (!(gpe_sts_reg & GPE0A_PME_B0_STS_BIT))
+ return IRQ_NONE;
+
+ generic_handle_irq(irq_find_mapping(chip->irq.domain,
+ GPE0A_PME_B0_VIRT_GPIO_PIN));
+
+ pm_wakeup_hard_event(chip->parent);
+
+ return IRQ_HANDLED;
+}
+
+static bool int0002_check_wake(void *data)
+{
+ u32 gpe_sts_reg;
+
+ gpe_sts_reg = inl(GPE0A_STS_PORT);
+ return (gpe_sts_reg & GPE0A_PME_B0_STS_BIT);
+}
+
+static struct irq_chip int0002_irqchip = {
+ .name = DRV_NAME,
+ .irq_ack = int0002_irq_ack,
+ .irq_mask = int0002_irq_mask,
+ .irq_unmask = int0002_irq_unmask,
+ .irq_set_wake = int0002_irq_set_wake,
+};
+
+static const struct x86_cpu_id int0002_cpu_ids[] = {
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT, NULL),
+ X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT, NULL),
+ {}
+};
+
+static void int0002_init_irq_valid_mask(struct gpio_chip *chip,
+ unsigned long *valid_mask,
+ unsigned int ngpios)
+{
+ bitmap_clear(valid_mask, 0, GPE0A_PME_B0_VIRT_GPIO_PIN);
+}
+
+static int int0002_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct x86_cpu_id *cpu_id;
+ struct int0002_data *int0002;
+ struct gpio_irq_chip *girq;
+ struct gpio_chip *chip;
+ int irq, ret;
+
+ /* Menlow has a different INT0002 device? <sigh> */
+ cpu_id = x86_match_cpu(int0002_cpu_ids);
+ if (!cpu_id)
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ int0002 = devm_kzalloc(dev, sizeof(*int0002), GFP_KERNEL);
+ if (!int0002)
+ return -ENOMEM;
+
+ int0002->parent_irq = irq;
+
+ chip = &int0002->chip;
+ chip->label = DRV_NAME;
+ chip->parent = dev;
+ chip->owner = THIS_MODULE;
+ chip->get = int0002_gpio_get;
+ chip->set = int0002_gpio_set;
+ chip->direction_input = int0002_gpio_get;
+ chip->direction_output = int0002_gpio_direction_output;
+ chip->base = -1;
+ chip->ngpio = GPE0A_PME_B0_VIRT_GPIO_PIN + 1;
+ chip->irq.init_valid_mask = int0002_init_irq_valid_mask;
+
+ /*
+ * We directly request the irq here instead of passing a flow-handler
+ * to gpiochip_set_chained_irqchip, because the irq is shared.
+ * FIXME: augment this if we managed to pull handling of shared
+ * IRQs into gpiolib.
+ */
+ ret = devm_request_irq(dev, irq, int0002_irq,
+ IRQF_SHARED, "INT0002", chip);
+ if (ret) {
+ dev_err(dev, "Error requesting IRQ %d: %d\n", irq, ret);
+ return ret;
+ }
+
+ girq = &chip->irq;
+ girq->chip = &int0002_irqchip;
+ /* This let us handle the parent IRQ in the driver */
+ girq->parent_handler = NULL;
+ girq->num_parents = 0;
+ girq->parents = NULL;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_edge_irq;
+
+ ret = devm_gpiochip_add_data(dev, chip, NULL);
+ if (ret) {
+ dev_err(dev, "Error adding gpio chip: %d\n", ret);
+ return ret;
+ }
+
+ acpi_register_wakeup_handler(irq, int0002_check_wake, NULL);
+ device_init_wakeup(dev, true);
+ dev_set_drvdata(dev, int0002);
+ return 0;
+}
+
+static int int0002_remove(struct platform_device *pdev)
+{
+ device_init_wakeup(&pdev->dev, false);
+ acpi_unregister_wakeup_handler(int0002_check_wake, NULL);
+ return 0;
+}
+
+static int int0002_suspend(struct device *dev)
+{
+ struct int0002_data *int0002 = dev_get_drvdata(dev);
+
+ /*
+ * The INT0002 parent IRQ is often shared with the ACPI GPE IRQ, don't
+ * muck with it when firmware based suspend is used, otherwise we may
+ * cause spurious wakeups from firmware managed suspend.
+ */
+ if (!pm_suspend_via_firmware() && int0002->wake_enable_count)
+ enable_irq_wake(int0002->parent_irq);
+
+ return 0;
+}
+
+static int int0002_resume(struct device *dev)
+{
+ struct int0002_data *int0002 = dev_get_drvdata(dev);
+
+ if (!pm_suspend_via_firmware() && int0002->wake_enable_count)
+ disable_irq_wake(int0002->parent_irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops int0002_pm_ops = {
+ .suspend = int0002_suspend,
+ .resume = int0002_resume,
+};
+
+static const struct acpi_device_id int0002_acpi_ids[] = {
+ { "INT0002", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, int0002_acpi_ids);
+
+static struct platform_driver int0002_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .acpi_match_table = int0002_acpi_ids,
+ .pm = &int0002_pm_ops,
+ },
+ .probe = int0002_probe,
+ .remove = int0002_remove,
+};
+
+module_platform_driver(int0002_driver);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("Intel INT0002 Virtual GPIO driver");
+MODULE_LICENSE("GPL v2");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Intel INT0002 "Virtual GPIO" driver
- *
- * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
- *
- * Loosely based on android x86 kernel code which is:
- *
- * Copyright (c) 2014, Intel Corporation.
- *
- * Author: Dyut Kumar Sil <dyut.k.sil@intel.com>
- *
- * Some peripherals on Bay Trail and Cherry Trail platforms signal a Power
- * Management Event (PME) to the Power Management Controller (PMC) to wakeup
- * the system. When this happens software needs to clear the PME bus 0 status
- * bit in the GPE0a_STS register to avoid an IRQ storm on IRQ 9.
- *
- * This is modelled in ACPI through the INT0002 ACPI device, which is
- * called a "Virtual GPIO controller" in ACPI because it defines the event
- * handler to call when the PME triggers through _AEI and _L02 / _E02
- * methods as would be done for a real GPIO interrupt in ACPI. Note this
- * is a hack to define an AML event handler for the PME while using existing
- * ACPI mechanisms, this is not a real GPIO at all.
- *
- * This driver will bind to the INT0002 device, and register as a GPIO
- * controller, letting gpiolib-acpi.c call the _L02 handler as it would
- * for a real GPIO controller.
- */
-
-#include <linux/acpi.h>
-#include <linux/bitmap.h>
-#include <linux/gpio/driver.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/suspend.h>
-
-#include <asm/cpu_device_id.h>
-#include <asm/intel-family.h>
-
-#define DRV_NAME "INT0002 Virtual GPIO"
-
-/* For some reason the virtual GPIO pin tied to the GPE is numbered pin 2 */
-#define GPE0A_PME_B0_VIRT_GPIO_PIN 2
-
-#define GPE0A_PME_B0_STS_BIT BIT(13)
-#define GPE0A_PME_B0_EN_BIT BIT(13)
-#define GPE0A_STS_PORT 0x420
-#define GPE0A_EN_PORT 0x428
-
-struct int0002_data {
- struct gpio_chip chip;
- int parent_irq;
- int wake_enable_count;
-};
-
-/*
- * As this is not a real GPIO at all, but just a hack to model an event in
- * ACPI the get / set functions are dummy functions.
- */
-
-static int int0002_gpio_get(struct gpio_chip *chip, unsigned int offset)
-{
- return 0;
-}
-
-static void int0002_gpio_set(struct gpio_chip *chip, unsigned int offset,
- int value)
-{
-}
-
-static int int0002_gpio_direction_output(struct gpio_chip *chip,
- unsigned int offset, int value)
-{
- return 0;
-}
-
-static void int0002_irq_ack(struct irq_data *data)
-{
- outl(GPE0A_PME_B0_STS_BIT, GPE0A_STS_PORT);
-}
-
-static void int0002_irq_unmask(struct irq_data *data)
-{
- u32 gpe_en_reg;
-
- gpe_en_reg = inl(GPE0A_EN_PORT);
- gpe_en_reg |= GPE0A_PME_B0_EN_BIT;
- outl(gpe_en_reg, GPE0A_EN_PORT);
-}
-
-static void int0002_irq_mask(struct irq_data *data)
-{
- u32 gpe_en_reg;
-
- gpe_en_reg = inl(GPE0A_EN_PORT);
- gpe_en_reg &= ~GPE0A_PME_B0_EN_BIT;
- outl(gpe_en_reg, GPE0A_EN_PORT);
-}
-
-static int int0002_irq_set_wake(struct irq_data *data, unsigned int on)
-{
- struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
- struct int0002_data *int0002 = container_of(chip, struct int0002_data, chip);
-
- /*
- * Applying of the wakeup flag to our parent IRQ is delayed till system
- * suspend, because we only want to do this when using s2idle.
- */
- if (on)
- int0002->wake_enable_count++;
- else
- int0002->wake_enable_count--;
-
- return 0;
-}
-
-static irqreturn_t int0002_irq(int irq, void *data)
-{
- struct gpio_chip *chip = data;
- u32 gpe_sts_reg;
-
- gpe_sts_reg = inl(GPE0A_STS_PORT);
- if (!(gpe_sts_reg & GPE0A_PME_B0_STS_BIT))
- return IRQ_NONE;
-
- generic_handle_irq(irq_find_mapping(chip->irq.domain,
- GPE0A_PME_B0_VIRT_GPIO_PIN));
-
- pm_wakeup_hard_event(chip->parent);
-
- return IRQ_HANDLED;
-}
-
-static bool int0002_check_wake(void *data)
-{
- u32 gpe_sts_reg;
-
- gpe_sts_reg = inl(GPE0A_STS_PORT);
- return (gpe_sts_reg & GPE0A_PME_B0_STS_BIT);
-}
-
-static struct irq_chip int0002_irqchip = {
- .name = DRV_NAME,
- .irq_ack = int0002_irq_ack,
- .irq_mask = int0002_irq_mask,
- .irq_unmask = int0002_irq_unmask,
- .irq_set_wake = int0002_irq_set_wake,
-};
-
-static const struct x86_cpu_id int0002_cpu_ids[] = {
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT, NULL),
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT, NULL),
- {}
-};
-
-static void int0002_init_irq_valid_mask(struct gpio_chip *chip,
- unsigned long *valid_mask,
- unsigned int ngpios)
-{
- bitmap_clear(valid_mask, 0, GPE0A_PME_B0_VIRT_GPIO_PIN);
-}
-
-static int int0002_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- const struct x86_cpu_id *cpu_id;
- struct int0002_data *int0002;
- struct gpio_irq_chip *girq;
- struct gpio_chip *chip;
- int irq, ret;
-
- /* Menlow has a different INT0002 device? <sigh> */
- cpu_id = x86_match_cpu(int0002_cpu_ids);
- if (!cpu_id)
- return -ENODEV;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- int0002 = devm_kzalloc(dev, sizeof(*int0002), GFP_KERNEL);
- if (!int0002)
- return -ENOMEM;
-
- int0002->parent_irq = irq;
-
- chip = &int0002->chip;
- chip->label = DRV_NAME;
- chip->parent = dev;
- chip->owner = THIS_MODULE;
- chip->get = int0002_gpio_get;
- chip->set = int0002_gpio_set;
- chip->direction_input = int0002_gpio_get;
- chip->direction_output = int0002_gpio_direction_output;
- chip->base = -1;
- chip->ngpio = GPE0A_PME_B0_VIRT_GPIO_PIN + 1;
- chip->irq.init_valid_mask = int0002_init_irq_valid_mask;
-
- /*
- * We directly request the irq here instead of passing a flow-handler
- * to gpiochip_set_chained_irqchip, because the irq is shared.
- * FIXME: augment this if we managed to pull handling of shared
- * IRQs into gpiolib.
- */
- ret = devm_request_irq(dev, irq, int0002_irq,
- IRQF_SHARED, "INT0002", chip);
- if (ret) {
- dev_err(dev, "Error requesting IRQ %d: %d\n", irq, ret);
- return ret;
- }
-
- girq = &chip->irq;
- girq->chip = &int0002_irqchip;
- /* This let us handle the parent IRQ in the driver */
- girq->parent_handler = NULL;
- girq->num_parents = 0;
- girq->parents = NULL;
- girq->default_type = IRQ_TYPE_NONE;
- girq->handler = handle_edge_irq;
-
- ret = devm_gpiochip_add_data(dev, chip, NULL);
- if (ret) {
- dev_err(dev, "Error adding gpio chip: %d\n", ret);
- return ret;
- }
-
- acpi_register_wakeup_handler(irq, int0002_check_wake, NULL);
- device_init_wakeup(dev, true);
- dev_set_drvdata(dev, int0002);
- return 0;
-}
-
-static int int0002_remove(struct platform_device *pdev)
-{
- device_init_wakeup(&pdev->dev, false);
- acpi_unregister_wakeup_handler(int0002_check_wake, NULL);
- return 0;
-}
-
-static int int0002_suspend(struct device *dev)
-{
- struct int0002_data *int0002 = dev_get_drvdata(dev);
-
- /*
- * The INT0002 parent IRQ is often shared with the ACPI GPE IRQ, don't
- * muck with it when firmware based suspend is used, otherwise we may
- * cause spurious wakeups from firmware managed suspend.
- */
- if (!pm_suspend_via_firmware() && int0002->wake_enable_count)
- enable_irq_wake(int0002->parent_irq);
-
- return 0;
-}
-
-static int int0002_resume(struct device *dev)
-{
- struct int0002_data *int0002 = dev_get_drvdata(dev);
-
- if (!pm_suspend_via_firmware() && int0002->wake_enable_count)
- disable_irq_wake(int0002->parent_irq);
-
- return 0;
-}
-
-static const struct dev_pm_ops int0002_pm_ops = {
- .suspend = int0002_suspend,
- .resume = int0002_resume,
-};
-
-static const struct acpi_device_id int0002_acpi_ids[] = {
- { "INT0002", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(acpi, int0002_acpi_ids);
-
-static struct platform_driver int0002_driver = {
- .driver = {
- .name = DRV_NAME,
- .acpi_match_table = int0002_acpi_ids,
- .pm = &int0002_pm_ops,
- },
- .probe = int0002_probe,
- .remove = int0002_remove,
-};
-
-module_platform_driver(int0002_driver);
-
-MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
-MODULE_DESCRIPTION("Intel INT0002 Virtual GPIO driver");
-MODULE_LICENSE("GPL v2");
projects / linux.git / commitdiff