obj-$(CONFIG_X86_ANDROID_TABLETS) += x86-android-tablets.o
-x86-android-tablets-y := x86-android-tablets-main.o
+x86-android-tablets-y := core.o x86-android-tablets-main.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DMI based code to deal with broken DSDTs on X86 tablets which ship with
+ * Android as (part of) the factory image. The factory kernels shipped on these
+ * devices typically have a bunch of things hardcoded, rather than specified
+ * in their DSDT.
+ *
+ * Copyright (C) 2021-2023 Hans de Goede <hdegoede@redhat.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/serdev.h>
+#include <linux/string.h>
+
+#include "x86-android-tablets.h"
+/* For gpiochip_get_desc() which is EXPORT_SYMBOL_GPL() */
+#include "../../../gpio/gpiolib.h"
+#include "../../../gpio/gpiolib-acpi.h"
+
+static int gpiochip_find_match_label(struct gpio_chip *gc, void *data)
+{
+ return gc->label && !strcmp(gc->label, data);
+}
+
+int x86_android_tablet_get_gpiod(const char *label, int pin, struct gpio_desc **desc)
+{
+ struct gpio_desc *gpiod;
+ struct gpio_chip *chip;
+
+ chip = gpiochip_find((void *)label, gpiochip_find_match_label);
+ if (!chip) {
+ pr_err("error cannot find GPIO chip %s\n", label);
+ return -ENODEV;
+ }
+
+ gpiod = gpiochip_get_desc(chip, pin);
+ if (IS_ERR(gpiod)) {
+ pr_err("error %ld getting GPIO %s %d\n", PTR_ERR(gpiod), label, pin);
+ return PTR_ERR(gpiod);
+ }
+
+ *desc = gpiod;
+ return 0;
+}
+
+int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
+{
+ struct irq_fwspec fwspec = { };
+ struct irq_domain *domain;
+ struct acpi_device *adev;
+ struct gpio_desc *gpiod;
+ unsigned int irq_type;
+ acpi_handle handle;
+ acpi_status status;
+ int irq, ret;
+
+ switch (data->type) {
+ case X86_ACPI_IRQ_TYPE_APIC:
+ /*
+ * The DSDT may already reference the GSI in a device skipped by
+ * acpi_quirk_skip_i2c_client_enumeration(). Unregister the GSI
+ * to avoid EBUSY errors in this case.
+ */
+ acpi_unregister_gsi(data->index);
+ irq = acpi_register_gsi(NULL, data->index, data->trigger, data->polarity);
+ if (irq < 0)
+ pr_err("error %d getting APIC IRQ %d\n", irq, data->index);
+
+ return irq;
+ case X86_ACPI_IRQ_TYPE_GPIOINT:
+ /* Like acpi_dev_gpio_irq_get(), but without parsing ACPI resources */
+ ret = x86_android_tablet_get_gpiod(data->chip, data->index, &gpiod);
+ if (ret)
+ return ret;
+
+ irq = gpiod_to_irq(gpiod);
+ if (irq < 0) {
+ pr_err("error %d getting IRQ %s %d\n", irq, data->chip, data->index);
+ return irq;
+ }
+
+ irq_type = acpi_dev_get_irq_type(data->trigger, data->polarity);
+ if (irq_type != IRQ_TYPE_NONE && irq_type != irq_get_trigger_type(irq))
+ irq_set_irq_type(irq, irq_type);
+
+ return irq;
+ case X86_ACPI_IRQ_TYPE_PMIC:
+ status = acpi_get_handle(NULL, data->chip, &handle);
+ if (ACPI_FAILURE(status)) {
+ pr_err("error could not get %s handle\n", data->chip);
+ return -ENODEV;
+ }
+
+ adev = acpi_fetch_acpi_dev(handle);
+ if (!adev) {
+ pr_err("error could not get %s adev\n", data->chip);
+ return -ENODEV;
+ }
+
+ fwspec.fwnode = acpi_fwnode_handle(adev);
+ domain = irq_find_matching_fwspec(&fwspec, data->domain);
+ if (!domain) {
+ pr_err("error could not find IRQ domain for %s\n", data->chip);
+ return -ENODEV;
+ }
+
+ return irq_create_mapping(domain, data->index);
+ default:
+ return 0;
+ }
+}
+
+static int i2c_client_count;
+static int pdev_count;
+static int serdev_count;
+static struct i2c_client **i2c_clients;
+static struct platform_device **pdevs;
+static struct serdev_device **serdevs;
+static struct gpiod_lookup_table * const *gpiod_lookup_tables;
+static const struct software_node *bat_swnode;
+static void (*exit_handler)(void);
+
+static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
+ int idx)
+{
+ const struct x86_i2c_client_info *client_info = &dev_info->i2c_client_info[idx];
+ struct i2c_board_info board_info = client_info->board_info;
+ struct i2c_adapter *adap;
+ acpi_handle handle;
+ acpi_status status;
+
+ board_info.irq = x86_acpi_irq_helper_get(&client_info->irq_data);
+ if (board_info.irq < 0)
+ return board_info.irq;
+
+ status = acpi_get_handle(NULL, client_info->adapter_path, &handle);
+ if (ACPI_FAILURE(status)) {
+ pr_err("Error could not get %s handle\n", client_info->adapter_path);
+ return -ENODEV;
+ }
+
+ adap = i2c_acpi_find_adapter_by_handle(handle);
+ if (!adap) {
+ pr_err("error could not get %s adapter\n", client_info->adapter_path);
+ return -ENODEV;
+ }
+
+ i2c_clients[idx] = i2c_new_client_device(adap, &board_info);
+ put_device(&adap->dev);
+ if (IS_ERR(i2c_clients[idx]))
+ return dev_err_probe(&adap->dev, PTR_ERR(i2c_clients[idx]),
+ "creating I2C-client %d\n", idx);
+
+ return 0;
+}
+
+static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int idx)
+{
+ struct acpi_device *ctrl_adev, *serdev_adev;
+ struct serdev_device *serdev;
+ struct device *ctrl_dev;
+ int ret = -ENODEV;
+
+ ctrl_adev = acpi_dev_get_first_match_dev(info->ctrl_hid, info->ctrl_uid, -1);
+ if (!ctrl_adev) {
+ pr_err("error could not get %s/%s ctrl adev\n",
+ info->ctrl_hid, info->ctrl_uid);
+ return -ENODEV;
+ }
+
+ serdev_adev = acpi_dev_get_first_match_dev(info->serdev_hid, NULL, -1);
+ if (!serdev_adev) {
+ pr_err("error could not get %s serdev adev\n", info->serdev_hid);
+ goto put_ctrl_adev;
+ }
+
+ /* get_first_physical_node() returns a weak ref, no need to put() it */
+ ctrl_dev = acpi_get_first_physical_node(ctrl_adev);
+ if (!ctrl_dev) {
+ pr_err("error could not get %s/%s ctrl physical dev\n",
+ info->ctrl_hid, info->ctrl_uid);
+ goto put_serdev_adev;
+ }
+
+ /* ctrl_dev now points to the controller's parent, get the controller */
+ ctrl_dev = device_find_child_by_name(ctrl_dev, info->ctrl_devname);
+ if (!ctrl_dev) {
+ pr_err("error could not get %s/%s %s ctrl dev\n",
+ info->ctrl_hid, info->ctrl_uid, info->ctrl_devname);
+ goto put_serdev_adev;
+ }
+
+ serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev));
+ if (!serdev) {
+ ret = -ENOMEM;
+ goto put_serdev_adev;
+ }
+
+ ACPI_COMPANION_SET(&serdev->dev, serdev_adev);
+ acpi_device_set_enumerated(serdev_adev);
+
+ ret = serdev_device_add(serdev);
+ if (ret) {
+ dev_err(&serdev->dev, "error %d adding serdev\n", ret);
+ serdev_device_put(serdev);
+ goto put_serdev_adev;
+ }
+
+ serdevs[idx] = serdev;
+
+put_serdev_adev:
+ acpi_dev_put(serdev_adev);
+put_ctrl_adev:
+ acpi_dev_put(ctrl_adev);
+ return ret;
+}
+
+static void x86_android_tablet_cleanup(void)
+{
+ int i;
+
+ for (i = 0; i < serdev_count; i++) {
+ if (serdevs[i])
+ serdev_device_remove(serdevs[i]);
+ }
+
+ kfree(serdevs);
+
+ for (i = 0; i < pdev_count; i++)
+ platform_device_unregister(pdevs[i]);
+
+ kfree(pdevs);
+
+ for (i = 0; i < i2c_client_count; i++)
+ i2c_unregister_device(i2c_clients[i]);
+
+ kfree(i2c_clients);
+
+ if (exit_handler)
+ exit_handler();
+
+ for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
+ gpiod_remove_lookup_table(gpiod_lookup_tables[i]);
+
+ software_node_unregister(bat_swnode);
+}
+
+extern const struct dmi_system_id x86_android_tablet_ids[];
+
+static __init int x86_android_tablet_init(void)
+{
+ const struct x86_dev_info *dev_info;
+ const struct dmi_system_id *id;
+ struct gpio_chip *chip;
+ int i, ret = 0;
+
+ id = dmi_first_match(x86_android_tablet_ids);
+ if (!id)
+ return -ENODEV;
+
+ dev_info = id->driver_data;
+
+ /*
+ * The broken DSDTs on these devices often also include broken
+ * _AEI (ACPI Event Interrupt) handlers, disable these.
+ */
+ if (dev_info->invalid_aei_gpiochip) {
+ chip = gpiochip_find(dev_info->invalid_aei_gpiochip,
+ gpiochip_find_match_label);
+ if (!chip) {
+ pr_err("error cannot find GPIO chip %s\n", dev_info->invalid_aei_gpiochip);
+ return -ENODEV;
+ }
+ acpi_gpiochip_free_interrupts(chip);
+ }
+
+ /*
+ * Since this runs from module_init() it cannot use -EPROBE_DEFER,
+ * instead pre-load any modules which are listed as requirements.
+ */
+ for (i = 0; dev_info->modules && dev_info->modules[i]; i++)
+ request_module(dev_info->modules[i]);
+
+ bat_swnode = dev_info->bat_swnode;
+ if (bat_swnode) {
+ ret = software_node_register(bat_swnode);
+ if (ret)
+ return ret;
+ }
+
+ gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
+ for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
+ gpiod_add_lookup_table(gpiod_lookup_tables[i]);
+
+ if (dev_info->init) {
+ ret = dev_info->init();
+ if (ret < 0) {
+ x86_android_tablet_cleanup();
+ return ret;
+ }
+ exit_handler = dev_info->exit;
+ }
+
+ i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
+ if (!i2c_clients) {
+ x86_android_tablet_cleanup();
+ return -ENOMEM;
+ }
+
+ i2c_client_count = dev_info->i2c_client_count;
+ for (i = 0; i < i2c_client_count; i++) {
+ ret = x86_instantiate_i2c_client(dev_info, i);
+ if (ret < 0) {
+ x86_android_tablet_cleanup();
+ return ret;
+ }
+ }
+
+ pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL);
+ if (!pdevs) {
+ x86_android_tablet_cleanup();
+ return -ENOMEM;
+ }
+
+ pdev_count = dev_info->pdev_count;
+ for (i = 0; i < pdev_count; i++) {
+ pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
+ if (IS_ERR(pdevs[i])) {
+ x86_android_tablet_cleanup();
+ return PTR_ERR(pdevs[i]);
+ }
+ }
+
+ serdevs = kcalloc(dev_info->serdev_count, sizeof(*serdevs), GFP_KERNEL);
+ if (!serdevs) {
+ x86_android_tablet_cleanup();
+ return -ENOMEM;
+ }
+
+ serdev_count = dev_info->serdev_count;
+ for (i = 0; i < serdev_count; i++) {
+ ret = x86_instantiate_serdev(&dev_info->serdev_info[i], i);
+ if (ret < 0) {
+ x86_android_tablet_cleanup();
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+module_init(x86_android_tablet_init);
+module_exit(x86_android_tablet_cleanup);
+
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver");
+MODULE_LICENSE("GPL");
#include <linux/dmi.h>
#include <linux/efi.h>
#include <linux/gpio_keys.h>
-#include <linux/gpio/consumer.h>
-#include <linux/gpio/driver.h>
#include <linux/gpio/machine.h>
-#include <linux/i2c.h>
#include <linux/input.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/power/bq24190_charger.h>
#include <linux/reboot.h>
#include <linux/rmi.h>
-#include <linux/serdev.h>
#include <linux/spi/spi.h>
-#include <linux/string.h>
-/* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */
-#include "../../../gpio/gpiolib.h"
-#include "../../../gpio/gpiolib-acpi.h"
-/*
- * Helper code to get Linux IRQ numbers given a description of the IRQ source
- * (either IOAPIC index, or GPIO chip name + pin-number).
- */
-enum x86_acpi_irq_type {
- X86_ACPI_IRQ_TYPE_NONE,
- X86_ACPI_IRQ_TYPE_APIC,
- X86_ACPI_IRQ_TYPE_GPIOINT,
- X86_ACPI_IRQ_TYPE_PMIC,
-};
-
-struct x86_acpi_irq_data {
- char *chip; /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
- enum x86_acpi_irq_type type;
- enum irq_domain_bus_token domain;
- int index;
- int trigger; /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
- int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
-};
-
-static int gpiochip_find_match_label(struct gpio_chip *gc, void *data)
-{
- return gc->label && !strcmp(gc->label, data);
-}
-
-static int x86_android_tablet_get_gpiod(char *label, int pin, struct gpio_desc **desc)
-{
- struct gpio_desc *gpiod;
- struct gpio_chip *chip;
-
- chip = gpiochip_find(label, gpiochip_find_match_label);
- if (!chip) {
- pr_err("error cannot find GPIO chip %s\n", label);
- return -ENODEV;
- }
-
- gpiod = gpiochip_get_desc(chip, pin);
- if (IS_ERR(gpiod)) {
- pr_err("error %ld getting GPIO %s %d\n", PTR_ERR(gpiod), label, pin);
- return PTR_ERR(gpiod);
- }
-
- *desc = gpiod;
- return 0;
-}
-
-static int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data)
-{
- struct irq_fwspec fwspec = { };
- struct irq_domain *domain;
- struct acpi_device *adev;
- struct gpio_desc *gpiod;
- unsigned int irq_type;
- acpi_handle handle;
- acpi_status status;
- int irq, ret;
-
- switch (data->type) {
- case X86_ACPI_IRQ_TYPE_APIC:
- /*
- * The DSDT may already reference the GSI in a device skipped by
- * acpi_quirk_skip_i2c_client_enumeration(). Unregister the GSI
- * to avoid EBUSY errors in this case.
- */
- acpi_unregister_gsi(data->index);
- irq = acpi_register_gsi(NULL, data->index, data->trigger, data->polarity);
- if (irq < 0)
- pr_err("error %d getting APIC IRQ %d\n", irq, data->index);
-
- return irq;
- case X86_ACPI_IRQ_TYPE_GPIOINT:
- /* Like acpi_dev_gpio_irq_get(), but without parsing ACPI resources */
- ret = x86_android_tablet_get_gpiod(data->chip, data->index, &gpiod);
- if (ret)
- return ret;
-
- irq = gpiod_to_irq(gpiod);
- if (irq < 0) {
- pr_err("error %d getting IRQ %s %d\n", irq, data->chip, data->index);
- return irq;
- }
-
- irq_type = acpi_dev_get_irq_type(data->trigger, data->polarity);
- if (irq_type != IRQ_TYPE_NONE && irq_type != irq_get_trigger_type(irq))
- irq_set_irq_type(irq, irq_type);
-
- return irq;
- case X86_ACPI_IRQ_TYPE_PMIC:
- status = acpi_get_handle(NULL, data->chip, &handle);
- if (ACPI_FAILURE(status)) {
- pr_err("error could not get %s handle\n", data->chip);
- return -ENODEV;
- }
-
- adev = acpi_fetch_acpi_dev(handle);
- if (!adev) {
- pr_err("error could not get %s adev\n", data->chip);
- return -ENODEV;
- }
-
- fwspec.fwnode = acpi_fwnode_handle(adev);
- domain = irq_find_matching_fwspec(&fwspec, data->domain);
- if (!domain) {
- pr_err("error could not find IRQ domain for %s\n", data->chip);
- return -ENODEV;
- }
-
- return irq_create_mapping(domain, data->index);
- default:
- return 0;
- }
-}
-
-struct x86_i2c_client_info {
- struct i2c_board_info board_info;
- char *adapter_path;
- struct x86_acpi_irq_data irq_data;
-};
-
-struct x86_serdev_info {
- const char *ctrl_hid;
- const char *ctrl_uid;
- const char *ctrl_devname;
- /*
- * ATM the serdev core only supports of or ACPI matching; and sofar all
- * Android x86 tablets DSDTs have usable serdev nodes, but sometimes
- * under the wrong controller. So we just tie the existing serdev ACPI
- * node to the right controller.
- */
- const char *serdev_hid;
-};
-
-struct x86_dev_info {
- char *invalid_aei_gpiochip;
- const char * const *modules;
- const struct software_node *bat_swnode;
- struct gpiod_lookup_table * const *gpiod_lookup_tables;
- const struct x86_i2c_client_info *i2c_client_info;
- const struct platform_device_info *pdev_info;
- const struct x86_serdev_info *serdev_info;
- int i2c_client_count;
- int pdev_count;
- int serdev_count;
- int (*init)(void);
- void (*exit)(void);
-};
+#include "x86-android-tablets.h"
/* Generic / shared charger / battery settings */
static const char * const tusb1211_chg_det_psy[] = { "tusb1211-charger-detect" };
.i2c_client_count = ARRAY_SIZE(xiaomi_mipad2_i2c_clients),
};
-static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
+const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
{
/* Acer Iconia One 7 B1-750 */
.matches = {
{ }
};
MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids);
-
-static int i2c_client_count;
-static int pdev_count;
-static int serdev_count;
-static struct i2c_client **i2c_clients;
-static struct platform_device **pdevs;
-static struct serdev_device **serdevs;
-static struct gpiod_lookup_table * const *gpiod_lookup_tables;
-static const struct software_node *bat_swnode;
-static void (*exit_handler)(void);
-
-static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info,
- int idx)
-{
- const struct x86_i2c_client_info *client_info = &dev_info->i2c_client_info[idx];
- struct i2c_board_info board_info = client_info->board_info;
- struct i2c_adapter *adap;
- acpi_handle handle;
- acpi_status status;
-
- board_info.irq = x86_acpi_irq_helper_get(&client_info->irq_data);
- if (board_info.irq < 0)
- return board_info.irq;
-
- status = acpi_get_handle(NULL, client_info->adapter_path, &handle);
- if (ACPI_FAILURE(status)) {
- pr_err("Error could not get %s handle\n", client_info->adapter_path);
- return -ENODEV;
- }
-
- adap = i2c_acpi_find_adapter_by_handle(handle);
- if (!adap) {
- pr_err("error could not get %s adapter\n", client_info->adapter_path);
- return -ENODEV;
- }
-
- i2c_clients[idx] = i2c_new_client_device(adap, &board_info);
- put_device(&adap->dev);
- if (IS_ERR(i2c_clients[idx]))
- return dev_err_probe(&adap->dev, PTR_ERR(i2c_clients[idx]),
- "creating I2C-client %d\n", idx);
-
- return 0;
-}
-
-static __init int x86_instantiate_serdev(const struct x86_serdev_info *info, int idx)
-{
- struct acpi_device *ctrl_adev, *serdev_adev;
- struct serdev_device *serdev;
- struct device *ctrl_dev;
- int ret = -ENODEV;
-
- ctrl_adev = acpi_dev_get_first_match_dev(info->ctrl_hid, info->ctrl_uid, -1);
- if (!ctrl_adev) {
- pr_err("error could not get %s/%s ctrl adev\n",
- info->ctrl_hid, info->ctrl_uid);
- return -ENODEV;
- }
-
- serdev_adev = acpi_dev_get_first_match_dev(info->serdev_hid, NULL, -1);
- if (!serdev_adev) {
- pr_err("error could not get %s serdev adev\n", info->serdev_hid);
- goto put_ctrl_adev;
- }
-
- /* get_first_physical_node() returns a weak ref, no need to put() it */
- ctrl_dev = acpi_get_first_physical_node(ctrl_adev);
- if (!ctrl_dev) {
- pr_err("error could not get %s/%s ctrl physical dev\n",
- info->ctrl_hid, info->ctrl_uid);
- goto put_serdev_adev;
- }
-
- /* ctrl_dev now points to the controller's parent, get the controller */
- ctrl_dev = device_find_child_by_name(ctrl_dev, info->ctrl_devname);
- if (!ctrl_dev) {
- pr_err("error could not get %s/%s %s ctrl dev\n",
- info->ctrl_hid, info->ctrl_uid, info->ctrl_devname);
- goto put_serdev_adev;
- }
-
- serdev = serdev_device_alloc(to_serdev_controller(ctrl_dev));
- if (!serdev) {
- ret = -ENOMEM;
- goto put_serdev_adev;
- }
-
- ACPI_COMPANION_SET(&serdev->dev, serdev_adev);
- acpi_device_set_enumerated(serdev_adev);
-
- ret = serdev_device_add(serdev);
- if (ret) {
- dev_err(&serdev->dev, "error %d adding serdev\n", ret);
- serdev_device_put(serdev);
- goto put_serdev_adev;
- }
-
- serdevs[idx] = serdev;
-
-put_serdev_adev:
- acpi_dev_put(serdev_adev);
-put_ctrl_adev:
- acpi_dev_put(ctrl_adev);
- return ret;
-}
-
-static void x86_android_tablet_cleanup(void)
-{
- int i;
-
- for (i = 0; i < serdev_count; i++) {
- if (serdevs[i])
- serdev_device_remove(serdevs[i]);
- }
-
- kfree(serdevs);
-
- for (i = 0; i < pdev_count; i++)
- platform_device_unregister(pdevs[i]);
-
- kfree(pdevs);
-
- for (i = 0; i < i2c_client_count; i++)
- i2c_unregister_device(i2c_clients[i]);
-
- kfree(i2c_clients);
-
- if (exit_handler)
- exit_handler();
-
- for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
- gpiod_remove_lookup_table(gpiod_lookup_tables[i]);
-
- software_node_unregister(bat_swnode);
-}
-
-static __init int x86_android_tablet_init(void)
-{
- const struct x86_dev_info *dev_info;
- const struct dmi_system_id *id;
- struct gpio_chip *chip;
- int i, ret = 0;
-
- id = dmi_first_match(x86_android_tablet_ids);
- if (!id)
- return -ENODEV;
-
- dev_info = id->driver_data;
-
- /*
- * The broken DSDTs on these devices often also include broken
- * _AEI (ACPI Event Interrupt) handlers, disable these.
- */
- if (dev_info->invalid_aei_gpiochip) {
- chip = gpiochip_find(dev_info->invalid_aei_gpiochip,
- gpiochip_find_match_label);
- if (!chip) {
- pr_err("error cannot find GPIO chip %s\n", dev_info->invalid_aei_gpiochip);
- return -ENODEV;
- }
- acpi_gpiochip_free_interrupts(chip);
- }
-
- /*
- * Since this runs from module_init() it cannot use -EPROBE_DEFER,
- * instead pre-load any modules which are listed as requirements.
- */
- for (i = 0; dev_info->modules && dev_info->modules[i]; i++)
- request_module(dev_info->modules[i]);
-
- bat_swnode = dev_info->bat_swnode;
- if (bat_swnode) {
- ret = software_node_register(bat_swnode);
- if (ret)
- return ret;
- }
-
- gpiod_lookup_tables = dev_info->gpiod_lookup_tables;
- for (i = 0; gpiod_lookup_tables && gpiod_lookup_tables[i]; i++)
- gpiod_add_lookup_table(gpiod_lookup_tables[i]);
-
- if (dev_info->init) {
- ret = dev_info->init();
- if (ret < 0) {
- x86_android_tablet_cleanup();
- return ret;
- }
- exit_handler = dev_info->exit;
- }
-
- i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL);
- if (!i2c_clients) {
- x86_android_tablet_cleanup();
- return -ENOMEM;
- }
-
- i2c_client_count = dev_info->i2c_client_count;
- for (i = 0; i < i2c_client_count; i++) {
- ret = x86_instantiate_i2c_client(dev_info, i);
- if (ret < 0) {
- x86_android_tablet_cleanup();
- return ret;
- }
- }
-
- pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL);
- if (!pdevs) {
- x86_android_tablet_cleanup();
- return -ENOMEM;
- }
-
- pdev_count = dev_info->pdev_count;
- for (i = 0; i < pdev_count; i++) {
- pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]);
- if (IS_ERR(pdevs[i])) {
- x86_android_tablet_cleanup();
- return PTR_ERR(pdevs[i]);
- }
- }
-
- serdevs = kcalloc(dev_info->serdev_count, sizeof(*serdevs), GFP_KERNEL);
- if (!serdevs) {
- x86_android_tablet_cleanup();
- return -ENOMEM;
- }
-
- serdev_count = dev_info->serdev_count;
- for (i = 0; i < serdev_count; i++) {
- ret = x86_instantiate_serdev(&dev_info->serdev_info[i], i);
- if (ret < 0) {
- x86_android_tablet_cleanup();
- return ret;
- }
- }
-
- return 0;
-}
-
-module_init(x86_android_tablet_init);
-module_exit(x86_android_tablet_cleanup);
-
-MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
-MODULE_DESCRIPTION("X86 Android tablets DSDT fixups driver");
-MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * DMI based code to deal with broken DSDTs on X86 tablets which ship with
+ * Android as (part of) the factory image. The factory kernels shipped on these
+ * devices typically have a bunch of things hardcoded, rather than specified
+ * in their DSDT.
+ *
+ * Copyright (C) 2021-2023 Hans de Goede <hdegoede@redhat.com>
+ */
+#ifndef __PDX86_X86_ANDROID_TABLETS_H
+#define __PDX86_X86_ANDROID_TABLETS_H
+
+#include <linux/i2c.h>
+#include <linux/irqdomain_defs.h>
+
+struct gpio_desc;
+struct gpiod_lookup_table;
+struct platform_device_info;
+struct software_node;
+
+/*
+ * Helpers to get Linux IRQ numbers given a description of the IRQ source
+ * (either IOAPIC index, or GPIO chip name + pin-number).
+ */
+enum x86_acpi_irq_type {
+ X86_ACPI_IRQ_TYPE_NONE,
+ X86_ACPI_IRQ_TYPE_APIC,
+ X86_ACPI_IRQ_TYPE_GPIOINT,
+ X86_ACPI_IRQ_TYPE_PMIC,
+};
+
+struct x86_acpi_irq_data {
+ char *chip; /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
+ enum x86_acpi_irq_type type;
+ enum irq_domain_bus_token domain;
+ int index;
+ int trigger; /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
+ int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
+};
+
+/* Structs to describe devices to instantiate */
+struct x86_i2c_client_info {
+ struct i2c_board_info board_info;
+ char *adapter_path;
+ struct x86_acpi_irq_data irq_data;
+};
+
+struct x86_serdev_info {
+ const char *ctrl_hid;
+ const char *ctrl_uid;
+ const char *ctrl_devname;
+ /*
+ * ATM the serdev core only supports of or ACPI matching; and sofar all
+ * Android x86 tablets DSDTs have usable serdev nodes, but sometimes
+ * under the wrong controller. So we just tie the existing serdev ACPI
+ * node to the right controller.
+ */
+ const char *serdev_hid;
+};
+
+struct x86_dev_info {
+ char *invalid_aei_gpiochip;
+ const char * const *modules;
+ const struct software_node *bat_swnode;
+ struct gpiod_lookup_table * const *gpiod_lookup_tables;
+ const struct x86_i2c_client_info *i2c_client_info;
+ const struct platform_device_info *pdev_info;
+ const struct x86_serdev_info *serdev_info;
+ int i2c_client_count;
+ int pdev_count;
+ int serdev_count;
+ int (*init)(void);
+ void (*exit)(void);
+};
+
+int x86_android_tablet_get_gpiod(const char *label, int pin, struct gpio_desc **desc);
+int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data);
+
+#endif
projects / linux.git / commitdiff