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57a1832222
Some x86 ACPI boards have broken AC and battery ACPI devices in their ACPI tables. This is often tied to these devices using certain PMICs where the factory OS image seems to be using native charger and fuel-gauge drivers instead. So far both the AC and battery drivers have almost identical checks for these PMICs including both of them having a DMI based mechanism to force usage of the ACPI AC and battery drivers on some boards even though one of these PMICs is present, with the same 2 boards listed in both driver's DMI tables for this. The only difference is that the AC driver checks for 2 PMICs and the battery driver only for one. This has grown this way because the other (Whiskey Cove) PMIC is only used on a few boards (3 known boards) and although some of these do have non working ACPI battery devices, their _STA method always returns 0, but that really should not be relied on. This patch factors out the shared checks into a new acpi_quirk_skip_acpi_ac_and_battery() helper and moves the AC and battery drivers over to this new helper. Note the DMI table is shared with acpi_quirk_skip_i2c_client_enumeration() and acpi_quirk_skip_serdev_enumeration(), because boards needing DMI quirks for either of these typically also have broken AC and battery ACPI devices. The ACPI_QUIRK_SKIP_ACPI_AC_AND_BATTERY quirk is not set yet on boards already in this DMI table, to avoid introducing any functional changes in this refactoring patch. Besided sharing the code between the AC and battery drivers this refactoring also moves this quirk handling to under #ifdef CONFIG_X86, removing this x86 specific code from non x86 ACPI builds. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
338 lines
7.6 KiB
C
338 lines
7.6 KiB
C
// 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 <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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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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#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_only;
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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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if (ac_only) {
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ac->state = 1;
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return 0;
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}
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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_only_quirk(const struct dmi_system_id *d)
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{
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ac_only = 1;
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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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/* Kodlix GK45 returning incorrect state */
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.callback = ac_only_quirk,
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.matches = {
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DMI_MATCH(DMI_PRODUCT_NAME, "GK45"),
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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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int result;
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if (acpi_disabled)
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return -ENODEV;
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if (acpi_quirk_skip_acpi_ac_and_battery())
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return -ENODEV;
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dmi_check_system(ac_dmi_table);
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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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