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355 lines
8.3 KiB
355 lines
8.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* acpi_ac.c - ACPI AC Adapter Driver (Revision: 27) |
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* |
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* Copyright (C) 2001, 2002 Andy Grover <[email protected]> |
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <[email protected]> |
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*/ |
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#define pr_fmt(fmt) "ACPI: AC: " fmt |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/types.h> |
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#include <linux/dmi.h> |
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#include <linux/delay.h> |
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#include <linux/platform_device.h> |
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#include <linux/power_supply.h> |
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#include <linux/acpi.h> |
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#include <acpi/battery.h> |
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#define ACPI_AC_CLASS "ac_adapter" |
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#define ACPI_AC_DEVICE_NAME "AC Adapter" |
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#define ACPI_AC_FILE_STATE "state" |
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#define ACPI_AC_NOTIFY_STATUS 0x80 |
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#define ACPI_AC_STATUS_OFFLINE 0x00 |
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#define ACPI_AC_STATUS_ONLINE 0x01 |
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#define ACPI_AC_STATUS_UNKNOWN 0xFF |
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MODULE_AUTHOR("Paul Diefenbaugh"); |
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MODULE_DESCRIPTION("ACPI AC Adapter Driver"); |
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MODULE_LICENSE("GPL"); |
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static int acpi_ac_add(struct acpi_device *device); |
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static int acpi_ac_remove(struct acpi_device *device); |
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static void acpi_ac_notify(struct acpi_device *device, u32 event); |
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struct acpi_ac_bl { |
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const char *hid; |
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int hrv; |
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}; |
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static const struct acpi_device_id ac_device_ids[] = { |
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{"ACPI0003", 0}, |
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{"", 0}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, ac_device_ids); |
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/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */ |
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static const struct acpi_ac_bl acpi_ac_blacklist[] = { |
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{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */ |
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{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */ |
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}; |
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#ifdef CONFIG_PM_SLEEP |
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static int acpi_ac_resume(struct device *dev); |
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#endif |
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static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume); |
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static int ac_sleep_before_get_state_ms; |
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static int ac_check_pmic = 1; |
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static struct acpi_driver acpi_ac_driver = { |
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.name = "ac", |
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.class = ACPI_AC_CLASS, |
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.ids = ac_device_ids, |
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.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
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.ops = { |
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.add = acpi_ac_add, |
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.remove = acpi_ac_remove, |
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.notify = acpi_ac_notify, |
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}, |
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.drv.pm = &acpi_ac_pm, |
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}; |
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struct acpi_ac { |
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struct power_supply *charger; |
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struct power_supply_desc charger_desc; |
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struct acpi_device *device; |
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unsigned long long state; |
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struct notifier_block battery_nb; |
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}; |
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#define to_acpi_ac(x) power_supply_get_drvdata(x) |
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/* AC Adapter Management */ |
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static int acpi_ac_get_state(struct acpi_ac *ac) |
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{ |
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acpi_status status = AE_OK; |
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if (!ac) |
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return -EINVAL; |
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status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, |
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&ac->state); |
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if (ACPI_FAILURE(status)) { |
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acpi_handle_info(ac->device->handle, |
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"Error reading AC Adapter state: %s\n", |
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acpi_format_exception(status)); |
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ac->state = ACPI_AC_STATUS_UNKNOWN; |
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return -ENODEV; |
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} |
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return 0; |
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} |
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/* sysfs I/F */ |
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static int get_ac_property(struct power_supply *psy, |
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enum power_supply_property psp, |
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union power_supply_propval *val) |
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{ |
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struct acpi_ac *ac = to_acpi_ac(psy); |
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if (!ac) |
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return -ENODEV; |
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if (acpi_ac_get_state(ac)) |
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return -ENODEV; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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val->intval = ac->state; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static enum power_supply_property ac_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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}; |
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/* Driver Model */ |
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static void acpi_ac_notify(struct acpi_device *device, u32 event) |
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{ |
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struct acpi_ac *ac = acpi_driver_data(device); |
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if (!ac) |
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return; |
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switch (event) { |
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default: |
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acpi_handle_debug(device->handle, "Unsupported event [0x%x]\n", |
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event); |
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fallthrough; |
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case ACPI_AC_NOTIFY_STATUS: |
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case ACPI_NOTIFY_BUS_CHECK: |
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case ACPI_NOTIFY_DEVICE_CHECK: |
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/* |
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* A buggy BIOS may notify AC first and then sleep for |
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* a specific time before doing actual operations in the |
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* EC event handler (_Qxx). This will cause the AC state |
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* reported by the ACPI event to be incorrect, so wait for a |
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* specific time for the EC event handler to make progress. |
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*/ |
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if (ac_sleep_before_get_state_ms > 0) |
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msleep(ac_sleep_before_get_state_ms); |
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acpi_ac_get_state(ac); |
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acpi_bus_generate_netlink_event(device->pnp.device_class, |
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dev_name(&device->dev), event, |
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(u32) ac->state); |
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acpi_notifier_call_chain(device, event, (u32) ac->state); |
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kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
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} |
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} |
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static int acpi_ac_battery_notify(struct notifier_block *nb, |
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unsigned long action, void *data) |
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{ |
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struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb); |
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struct acpi_bus_event *event = (struct acpi_bus_event *)data; |
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/* |
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* On HP Pavilion dv6-6179er AC status notifications aren't triggered |
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* when adapter is plugged/unplugged. However, battery status |
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* notifications are triggered when battery starts charging or |
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* discharging. Re-reading AC status triggers lost AC notifications, |
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* if AC status has changed. |
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*/ |
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if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 && |
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event->type == ACPI_BATTERY_NOTIFY_STATUS) |
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acpi_ac_get_state(ac); |
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return NOTIFY_OK; |
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} |
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static int __init thinkpad_e530_quirk(const struct dmi_system_id *d) |
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{ |
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ac_sleep_before_get_state_ms = 1000; |
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return 0; |
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} |
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static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d) |
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{ |
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ac_check_pmic = 0; |
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return 0; |
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} |
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/* Please keep this list alphabetically sorted */ |
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static const struct dmi_system_id ac_dmi_table[] __initconst = { |
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{ |
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/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */ |
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.callback = ac_do_not_check_pmic_quirk, |
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.matches = { |
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DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"), |
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}, |
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}, |
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{ |
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/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */ |
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.callback = ac_do_not_check_pmic_quirk, |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "80XF"), |
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DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"), |
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}, |
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}, |
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{ |
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/* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */ |
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.callback = thinkpad_e530_quirk, |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
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DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"), |
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}, |
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}, |
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{}, |
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}; |
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static int acpi_ac_add(struct acpi_device *device) |
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{ |
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struct power_supply_config psy_cfg = {}; |
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int result = 0; |
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struct acpi_ac *ac = NULL; |
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if (!device) |
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return -EINVAL; |
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ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
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if (!ac) |
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return -ENOMEM; |
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ac->device = device; |
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strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
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strcpy(acpi_device_class(device), ACPI_AC_CLASS); |
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device->driver_data = ac; |
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result = acpi_ac_get_state(ac); |
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if (result) |
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goto end; |
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psy_cfg.drv_data = ac; |
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ac->charger_desc.name = acpi_device_bid(device); |
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ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS; |
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ac->charger_desc.properties = ac_props; |
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ac->charger_desc.num_properties = ARRAY_SIZE(ac_props); |
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ac->charger_desc.get_property = get_ac_property; |
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ac->charger = power_supply_register(&ac->device->dev, |
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&ac->charger_desc, &psy_cfg); |
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if (IS_ERR(ac->charger)) { |
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result = PTR_ERR(ac->charger); |
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goto end; |
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} |
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pr_info("%s [%s] (%s)\n", acpi_device_name(device), |
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acpi_device_bid(device), ac->state ? "on-line" : "off-line"); |
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ac->battery_nb.notifier_call = acpi_ac_battery_notify; |
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register_acpi_notifier(&ac->battery_nb); |
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end: |
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if (result) |
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kfree(ac); |
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return result; |
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} |
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#ifdef CONFIG_PM_SLEEP |
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static int acpi_ac_resume(struct device *dev) |
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{ |
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struct acpi_ac *ac; |
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unsigned int old_state; |
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if (!dev) |
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return -EINVAL; |
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ac = acpi_driver_data(to_acpi_device(dev)); |
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if (!ac) |
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return -EINVAL; |
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old_state = ac->state; |
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if (acpi_ac_get_state(ac)) |
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return 0; |
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if (old_state != ac->state) |
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kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE); |
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return 0; |
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} |
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#else |
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#define acpi_ac_resume NULL |
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#endif |
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static int acpi_ac_remove(struct acpi_device *device) |
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{ |
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struct acpi_ac *ac = NULL; |
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if (!device || !acpi_driver_data(device)) |
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return -EINVAL; |
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ac = acpi_driver_data(device); |
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power_supply_unregister(ac->charger); |
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unregister_acpi_notifier(&ac->battery_nb); |
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kfree(ac); |
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return 0; |
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} |
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static int __init acpi_ac_init(void) |
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{ |
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unsigned int i; |
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int result; |
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if (acpi_disabled) |
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return -ENODEV; |
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dmi_check_system(ac_dmi_table); |
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if (ac_check_pmic) { |
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for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++) |
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if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1", |
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acpi_ac_blacklist[i].hrv)) { |
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pr_info("found native %s PMIC, not loading\n", |
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acpi_ac_blacklist[i].hid); |
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return -ENODEV; |
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} |
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} |
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result = acpi_bus_register_driver(&acpi_ac_driver); |
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if (result < 0) |
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return -ENODEV; |
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return 0; |
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} |
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static void __exit acpi_ac_exit(void) |
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{ |
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acpi_bus_unregister_driver(&acpi_ac_driver); |
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} |
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module_init(acpi_ac_init); |
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module_exit(acpi_ac_exit);
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