diff options
Diffstat (limited to 'drivers/platform/x86/hp/hp-wmi.c')
| -rw-r--r-- | drivers/platform/x86/hp/hp-wmi.c | 1577 |
1 files changed, 1577 insertions, 0 deletions
diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c new file mode 100644 index 000000000..51f23ff1f --- /dev/null +++ b/drivers/platform/x86/hp/hp-wmi.c @@ -0,0 +1,1577 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HP WMI hotkeys + * + * Copyright (C) 2008 Red Hat <mjg@redhat.com> + * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi> + * + * Portions based on wistron_btns.c: + * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> + * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> + * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/input.h> +#include <linux/input/sparse-keymap.h> +#include <linux/platform_device.h> +#include <linux/platform_profile.h> +#include <linux/hwmon.h> +#include <linux/acpi.h> +#include <linux/rfkill.h> +#include <linux/string.h> +#include <linux/dmi.h> + +MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>"); +MODULE_DESCRIPTION("HP laptop WMI hotkeys driver"); +MODULE_LICENSE("GPL"); + +MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); +MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); + +#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" +#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4" +#define HP_OMEN_EC_THERMAL_PROFILE_OFFSET 0x95 +#define zero_if_sup(tmp) (zero_insize_support?0:sizeof(tmp)) // use when zero insize is required + +/* DMI board names of devices that should use the omen specific path for + * thermal profiles. + * This was obtained by taking a look in the windows omen command center + * app and parsing a json file that they use to figure out what capabilities + * the device should have. + * A device is considered an omen if the DisplayName in that list contains + * "OMEN", and it can use the thermal profile stuff if the "Feature" array + * contains "PerformanceControl". + */ +static const char * const omen_thermal_profile_boards[] = { + "84DA", "84DB", "84DC", "8574", "8575", "860A", "87B5", "8572", "8573", + "8600", "8601", "8602", "8605", "8606", "8607", "8746", "8747", "8749", + "874A", "8603", "8604", "8748", "886B", "886C", "878A", "878B", "878C", + "88C8", "88CB", "8786", "8787", "8788", "88D1", "88D2", "88F4", "88FD", + "88F5", "88F6", "88F7", "88FE", "88FF", "8900", "8901", "8902", "8912", + "8917", "8918", "8949", "894A", "89EB" +}; + +/* DMI Board names of Omen laptops that are specifically set to be thermal + * profile version 0 by the Omen Command Center app, regardless of what + * the get system design information WMI call returns + */ +static const char *const omen_thermal_profile_force_v0_boards[] = { + "8607", "8746", "8747", "8749", "874A", "8748" +}; + +enum hp_wmi_radio { + HPWMI_WIFI = 0x0, + HPWMI_BLUETOOTH = 0x1, + HPWMI_WWAN = 0x2, + HPWMI_GPS = 0x3, +}; + +enum hp_wmi_event_ids { + HPWMI_DOCK_EVENT = 0x01, + HPWMI_PARK_HDD = 0x02, + HPWMI_SMART_ADAPTER = 0x03, + HPWMI_BEZEL_BUTTON = 0x04, + HPWMI_WIRELESS = 0x05, + HPWMI_CPU_BATTERY_THROTTLE = 0x06, + HPWMI_LOCK_SWITCH = 0x07, + HPWMI_LID_SWITCH = 0x08, + HPWMI_SCREEN_ROTATION = 0x09, + HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A, + HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B, + HPWMI_PROXIMITY_SENSOR = 0x0C, + HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D, + HPWMI_PEAKSHIFT_PERIOD = 0x0F, + HPWMI_BATTERY_CHARGE_PERIOD = 0x10, + HPWMI_SANITIZATION_MODE = 0x17, + HPWMI_OMEN_KEY = 0x1D, + HPWMI_SMART_EXPERIENCE_APP = 0x21, +}; + +/* + * struct bios_args buffer is dynamically allocated. New WMI command types + * were introduced that exceeds 128-byte data size. Changes to handle + * the data size allocation scheme were kept in hp_wmi_perform_qurey function. + */ +struct bios_args { + u32 signature; + u32 command; + u32 commandtype; + u32 datasize; + u8 data[]; +}; + +enum hp_wmi_commandtype { + HPWMI_DISPLAY_QUERY = 0x01, + HPWMI_HDDTEMP_QUERY = 0x02, + HPWMI_ALS_QUERY = 0x03, + HPWMI_HARDWARE_QUERY = 0x04, + HPWMI_WIRELESS_QUERY = 0x05, + HPWMI_BATTERY_QUERY = 0x07, + HPWMI_BIOS_QUERY = 0x09, + HPWMI_FEATURE_QUERY = 0x0b, + HPWMI_HOTKEY_QUERY = 0x0c, + HPWMI_FEATURE2_QUERY = 0x0d, + HPWMI_WIRELESS2_QUERY = 0x1b, + HPWMI_POSTCODEERROR_QUERY = 0x2a, + HPWMI_SYSTEM_DEVICE_MODE = 0x40, + HPWMI_THERMAL_PROFILE_QUERY = 0x4c, +}; + +enum hp_wmi_gm_commandtype { + HPWMI_FAN_SPEED_GET_QUERY = 0x11, + HPWMI_SET_PERFORMANCE_MODE = 0x1A, + HPWMI_FAN_SPEED_MAX_GET_QUERY = 0x26, + HPWMI_FAN_SPEED_MAX_SET_QUERY = 0x27, + HPWMI_GET_SYSTEM_DESIGN_DATA = 0x28, +}; + +enum hp_wmi_command { + HPWMI_READ = 0x01, + HPWMI_WRITE = 0x02, + HPWMI_ODM = 0x03, + HPWMI_GM = 0x20008, +}; + +enum hp_wmi_hardware_mask { + HPWMI_DOCK_MASK = 0x01, + HPWMI_TABLET_MASK = 0x04, +}; + +struct bios_return { + u32 sigpass; + u32 return_code; +}; + +enum hp_return_value { + HPWMI_RET_WRONG_SIGNATURE = 0x02, + HPWMI_RET_UNKNOWN_COMMAND = 0x03, + HPWMI_RET_UNKNOWN_CMDTYPE = 0x04, + HPWMI_RET_INVALID_PARAMETERS = 0x05, +}; + +enum hp_wireless2_bits { + HPWMI_POWER_STATE = 0x01, + HPWMI_POWER_SOFT = 0x02, + HPWMI_POWER_BIOS = 0x04, + HPWMI_POWER_HARD = 0x08, + HPWMI_POWER_FW_OR_HW = HPWMI_POWER_BIOS | HPWMI_POWER_HARD, +}; + +enum hp_thermal_profile_omen_v0 { + HP_OMEN_V0_THERMAL_PROFILE_DEFAULT = 0x00, + HP_OMEN_V0_THERMAL_PROFILE_PERFORMANCE = 0x01, + HP_OMEN_V0_THERMAL_PROFILE_COOL = 0x02, +}; + +enum hp_thermal_profile_omen_v1 { + HP_OMEN_V1_THERMAL_PROFILE_DEFAULT = 0x30, + HP_OMEN_V1_THERMAL_PROFILE_PERFORMANCE = 0x31, + HP_OMEN_V1_THERMAL_PROFILE_COOL = 0x50, +}; + +enum hp_thermal_profile { + HP_THERMAL_PROFILE_PERFORMANCE = 0x00, + HP_THERMAL_PROFILE_DEFAULT = 0x01, + HP_THERMAL_PROFILE_COOL = 0x02, + HP_THERMAL_PROFILE_QUIET = 0x03, +}; + +#define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW) +#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT) + +struct bios_rfkill2_device_state { + u8 radio_type; + u8 bus_type; + u16 vendor_id; + u16 product_id; + u16 subsys_vendor_id; + u16 subsys_product_id; + u8 rfkill_id; + u8 power; + u8 unknown[4]; +}; + +/* 7 devices fit into the 128 byte buffer */ +#define HPWMI_MAX_RFKILL2_DEVICES 7 + +struct bios_rfkill2_state { + u8 unknown[7]; + u8 count; + u8 pad[8]; + struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES]; +}; + +static const struct key_entry hp_wmi_keymap[] = { + { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } }, + { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } }, + { KE_KEY, 0x270, { KEY_MICMUTE } }, + { KE_KEY, 0x20e6, { KEY_PROG1 } }, + { KE_KEY, 0x20e8, { KEY_MEDIA } }, + { KE_KEY, 0x2142, { KEY_MEDIA } }, + { KE_KEY, 0x213b, { KEY_INFO } }, + { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } }, + { KE_KEY, 0x216a, { KEY_SETUP } }, + { KE_KEY, 0x21a5, { KEY_PROG2 } }, /* HP Omen Key */ + { KE_KEY, 0x21a7, { KEY_FN_ESC } }, + { KE_KEY, 0x21a9, { KEY_TOUCHPAD_OFF } }, + { KE_KEY, 0x121a9, { KEY_TOUCHPAD_ON } }, + { KE_KEY, 0x231b, { KEY_HELP } }, + { KE_END, 0 } +}; + +static struct input_dev *hp_wmi_input_dev; +static struct platform_device *hp_wmi_platform_dev; +static struct platform_profile_handler platform_profile_handler; +static bool platform_profile_support; +static bool zero_insize_support; + +static struct rfkill *wifi_rfkill; +static struct rfkill *bluetooth_rfkill; +static struct rfkill *wwan_rfkill; + +struct rfkill2_device { + u8 id; + int num; + struct rfkill *rfkill; +}; + +static int rfkill2_count; +static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES]; + +/* + * Chassis Types values were obtained from SMBIOS reference + * specification version 3.00. A complete list of system enclosures + * and chassis types is available on Table 17. + */ +static const char * const tablet_chassis_types[] = { + "30", /* Tablet*/ + "31", /* Convertible */ + "32" /* Detachable */ +}; + +#define DEVICE_MODE_TABLET 0x06 + +/* map output size to the corresponding WMI method id */ +static inline int encode_outsize_for_pvsz(int outsize) +{ + if (outsize > 4096) + return -EINVAL; + if (outsize > 1024) + return 5; + if (outsize > 128) + return 4; + if (outsize > 4) + return 3; + if (outsize > 0) + return 2; + return 1; +} + +/* + * hp_wmi_perform_query + * + * query: The commandtype (enum hp_wmi_commandtype) + * write: The command (enum hp_wmi_command) + * buffer: Buffer used as input and/or output + * insize: Size of input buffer + * outsize: Size of output buffer + * + * returns zero on success + * an HP WMI query specific error code (which is positive) + * -EINVAL if the query was not successful at all + * -EINVAL if the output buffer size exceeds buffersize + * + * Note: The buffersize must at least be the maximum of the input and output + * size. E.g. Battery info query is defined to have 1 byte input + * and 128 byte output. The caller would do: + * buffer = kzalloc(128, GFP_KERNEL); + * ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128) + */ +static int hp_wmi_perform_query(int query, enum hp_wmi_command command, + void *buffer, int insize, int outsize) +{ + struct acpi_buffer input, output = { ACPI_ALLOCATE_BUFFER, NULL }; + struct bios_return *bios_return; + union acpi_object *obj = NULL; + struct bios_args *args = NULL; + int mid, actual_insize, actual_outsize; + size_t bios_args_size; + int ret; + + mid = encode_outsize_for_pvsz(outsize); + if (WARN_ON(mid < 0)) + return mid; + + actual_insize = max(insize, 128); + bios_args_size = struct_size(args, data, actual_insize); + args = kmalloc(bios_args_size, GFP_KERNEL); + if (!args) + return -ENOMEM; + + input.length = bios_args_size; + input.pointer = args; + + args->signature = 0x55434553; + args->command = command; + args->commandtype = query; + args->datasize = insize; + memcpy(args->data, buffer, flex_array_size(args, data, insize)); + + ret = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output); + if (ret) + goto out_free; + + obj = output.pointer; + if (!obj) { + ret = -EINVAL; + goto out_free; + } + + if (obj->type != ACPI_TYPE_BUFFER) { + pr_warn("query 0x%x returned an invalid object 0x%x\n", query, ret); + ret = -EINVAL; + goto out_free; + } + + bios_return = (struct bios_return *)obj->buffer.pointer; + ret = bios_return->return_code; + + if (ret) { + if (ret != HPWMI_RET_UNKNOWN_COMMAND && + ret != HPWMI_RET_UNKNOWN_CMDTYPE) + pr_warn("query 0x%x returned error 0x%x\n", query, ret); + goto out_free; + } + + /* Ignore output data of zero size */ + if (!outsize) + goto out_free; + + actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return))); + memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize); + memset(buffer + actual_outsize, 0, outsize - actual_outsize); + +out_free: + kfree(obj); + kfree(args); + return ret; +} + +static int hp_wmi_get_fan_speed(int fan) +{ + u8 fsh, fsl; + char fan_data[4] = { fan, 0, 0, 0 }; + + int ret = hp_wmi_perform_query(HPWMI_FAN_SPEED_GET_QUERY, HPWMI_GM, + &fan_data, sizeof(char), + sizeof(fan_data)); + + if (ret != 0) + return -EINVAL; + + fsh = fan_data[2]; + fsl = fan_data[3]; + + return (fsh << 8) | fsl; +} + +static int hp_wmi_read_int(int query) +{ + int val = 0, ret; + + ret = hp_wmi_perform_query(query, HPWMI_READ, &val, + zero_if_sup(val), sizeof(val)); + + if (ret) + return ret < 0 ? ret : -EINVAL; + + return val; +} + +static int hp_wmi_get_dock_state(void) +{ + int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY); + + if (state < 0) + return state; + + return !!(state & HPWMI_DOCK_MASK); +} + +static int hp_wmi_get_tablet_mode(void) +{ + char system_device_mode[4] = { 0 }; + const char *chassis_type; + bool tablet_found; + int ret; + + chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE); + if (!chassis_type) + return -ENODEV; + + tablet_found = match_string(tablet_chassis_types, + ARRAY_SIZE(tablet_chassis_types), + chassis_type) >= 0; + if (!tablet_found) + return -ENODEV; + + ret = hp_wmi_perform_query(HPWMI_SYSTEM_DEVICE_MODE, HPWMI_READ, + system_device_mode, zero_if_sup(system_device_mode), + sizeof(system_device_mode)); + if (ret < 0) + return ret; + + return system_device_mode[0] == DEVICE_MODE_TABLET; +} + +static int omen_thermal_profile_set(int mode) +{ + char buffer[2] = {0, mode}; + int ret; + + ret = hp_wmi_perform_query(HPWMI_SET_PERFORMANCE_MODE, HPWMI_GM, + &buffer, sizeof(buffer), 0); + + if (ret) + return ret < 0 ? ret : -EINVAL; + + return mode; +} + +static bool is_omen_thermal_profile(void) +{ + const char *board_name = dmi_get_system_info(DMI_BOARD_NAME); + + if (!board_name) + return false; + + return match_string(omen_thermal_profile_boards, + ARRAY_SIZE(omen_thermal_profile_boards), + board_name) >= 0; +} + +static int omen_get_thermal_policy_version(void) +{ + unsigned char buffer[8] = { 0 }; + int ret; + + const char *board_name = dmi_get_system_info(DMI_BOARD_NAME); + + if (board_name) { + int matches = match_string(omen_thermal_profile_force_v0_boards, + ARRAY_SIZE(omen_thermal_profile_force_v0_boards), + board_name); + if (matches >= 0) + return 0; + } + + ret = hp_wmi_perform_query(HPWMI_GET_SYSTEM_DESIGN_DATA, HPWMI_GM, + &buffer, sizeof(buffer), sizeof(buffer)); + + if (ret) + return ret < 0 ? ret : -EINVAL; + + return buffer[3]; +} + +static int omen_thermal_profile_get(void) +{ + u8 data; + + int ret = ec_read(HP_OMEN_EC_THERMAL_PROFILE_OFFSET, &data); + + if (ret) + return ret; + + return data; +} + +static int hp_wmi_fan_speed_max_set(int enabled) +{ + int ret; + + ret = hp_wmi_perform_query(HPWMI_FAN_SPEED_MAX_SET_QUERY, HPWMI_GM, + &enabled, sizeof(enabled), 0); + + if (ret) + return ret < 0 ? ret : -EINVAL; + + return enabled; +} + +static int hp_wmi_fan_speed_max_get(void) +{ + int val = 0, ret; + + ret = hp_wmi_perform_query(HPWMI_FAN_SPEED_MAX_GET_QUERY, HPWMI_GM, + &val, zero_if_sup(val), sizeof(val)); + + if (ret) + return ret < 0 ? ret : -EINVAL; + + return val; +} + +static int __init hp_wmi_bios_2008_later(void) +{ + int state = 0; + int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state, + zero_if_sup(state), sizeof(state)); + if (!ret) + return 1; + + return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO; +} + +static int __init hp_wmi_bios_2009_later(void) +{ + u8 state[128]; + int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state, + zero_if_sup(state), sizeof(state)); + if (!ret) + return 1; + + return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO; +} + +static int __init hp_wmi_enable_hotkeys(void) +{ + int value = 0x6e; + int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value, + sizeof(value), 0); + + return ret <= 0 ? ret : -EINVAL; +} + +static int hp_wmi_set_block(void *data, bool blocked) +{ + enum hp_wmi_radio r = (long)data; + int query = BIT(r + 8) | ((!blocked) << r); + int ret; + + ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, + &query, sizeof(query), 0); + + return ret <= 0 ? ret : -EINVAL; +} + +static const struct rfkill_ops hp_wmi_rfkill_ops = { + .set_block = hp_wmi_set_block, +}; + +static bool hp_wmi_get_sw_state(enum hp_wmi_radio r) +{ + int mask = 0x200 << (r * 8); + + int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY); + + /* TBD: Pass error */ + WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY"); + + return !(wireless & mask); +} + +static bool hp_wmi_get_hw_state(enum hp_wmi_radio r) +{ + int mask = 0x800 << (r * 8); + + int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY); + + /* TBD: Pass error */ + WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY"); + + return !(wireless & mask); +} + +static int hp_wmi_rfkill2_set_block(void *data, bool blocked) +{ + int rfkill_id = (int)(long)data; + char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked }; + int ret; + + ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE, + buffer, sizeof(buffer), 0); + + return ret <= 0 ? ret : -EINVAL; +} + +static const struct rfkill_ops hp_wmi_rfkill2_ops = { + .set_block = hp_wmi_rfkill2_set_block, +}; + +static int hp_wmi_rfkill2_refresh(void) +{ + struct bios_rfkill2_state state; + int err, i; + + err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state, + zero_if_sup(state), sizeof(state)); + if (err) + return err; + + for (i = 0; i < rfkill2_count; i++) { + int num = rfkill2[i].num; + struct bios_rfkill2_device_state *devstate; + + devstate = &state.device[num]; + + if (num >= state.count || + devstate->rfkill_id != rfkill2[i].id) { + pr_warn("power configuration of the wireless devices unexpectedly changed\n"); + continue; + } + + rfkill_set_states(rfkill2[i].rfkill, + IS_SWBLOCKED(devstate->power), + IS_HWBLOCKED(devstate->power)); + } + + return 0; +} + +static ssize_t display_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY); + + if (value < 0) + return value; + return sprintf(buf, "%d\n", value); +} + +static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY); + + if (value < 0) + return value; + return sprintf(buf, "%d\n", value); +} + +static ssize_t als_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int value = hp_wmi_read_int(HPWMI_ALS_QUERY); + + if (value < 0) + return value; + return sprintf(buf, "%d\n", value); +} + +static ssize_t dock_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int value = hp_wmi_get_dock_state(); + + if (value < 0) + return value; + return sprintf(buf, "%d\n", value); +} + +static ssize_t tablet_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + int value = hp_wmi_get_tablet_mode(); + + if (value < 0) + return value; + return sprintf(buf, "%d\n", value); +} + +static ssize_t postcode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + /* Get the POST error code of previous boot failure. */ + int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY); + + if (value < 0) + return value; + return sprintf(buf, "0x%x\n", value); +} + +static ssize_t als_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + u32 tmp; + int ret; + + ret = kstrtou32(buf, 10, &tmp); + if (ret) + return ret; + + ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp, + sizeof(tmp), 0); + if (ret) + return ret < 0 ? ret : -EINVAL; + + return count; +} + +static ssize_t postcode_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + u32 tmp = 1; + bool clear; + int ret; + + ret = kstrtobool(buf, &clear); + if (ret) + return ret; + + if (clear == false) + return -EINVAL; + + /* Clear the POST error code. It is kept until cleared. */ + ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp, + sizeof(tmp), 0); + if (ret) + return ret < 0 ? ret : -EINVAL; + + return count; +} + +static DEVICE_ATTR_RO(display); +static DEVICE_ATTR_RO(hddtemp); +static DEVICE_ATTR_RW(als); +static DEVICE_ATTR_RO(dock); +static DEVICE_ATTR_RO(tablet); +static DEVICE_ATTR_RW(postcode); + +static struct attribute *hp_wmi_attrs[] = { + &dev_attr_display.attr, + &dev_attr_hddtemp.attr, + &dev_attr_als.attr, + &dev_attr_dock.attr, + &dev_attr_tablet.attr, + &dev_attr_postcode.attr, + NULL, +}; +ATTRIBUTE_GROUPS(hp_wmi); + +static void hp_wmi_notify(u32 value, void *context) +{ + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + u32 event_id, event_data; + union acpi_object *obj; + acpi_status status; + u32 *location; + int key_code; + + status = wmi_get_event_data(value, &response); + if (status != AE_OK) { + pr_info("bad event status 0x%x\n", status); + return; + } + + obj = (union acpi_object *)response.pointer; + + if (!obj) + return; + if (obj->type != ACPI_TYPE_BUFFER) { + pr_info("Unknown response received %d\n", obj->type); + kfree(obj); + return; + } + + /* + * Depending on ACPI version the concatenation of id and event data + * inside _WED function will result in a 8 or 16 byte buffer. + */ + location = (u32 *)obj->buffer.pointer; + if (obj->buffer.length == 8) { + event_id = *location; + event_data = *(location + 1); + } else if (obj->buffer.length == 16) { + event_id = *location; + event_data = *(location + 2); + } else { + pr_info("Unknown buffer length %d\n", obj->buffer.length); + kfree(obj); + return; + } + kfree(obj); + + switch (event_id) { + case HPWMI_DOCK_EVENT: + if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit)) + input_report_switch(hp_wmi_input_dev, SW_DOCK, + hp_wmi_get_dock_state()); + if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit)) + input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, + hp_wmi_get_tablet_mode()); + input_sync(hp_wmi_input_dev); + break; + case HPWMI_PARK_HDD: + break; + case HPWMI_SMART_ADAPTER: + break; + case HPWMI_BEZEL_BUTTON: + case HPWMI_OMEN_KEY: + key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY); + if (key_code < 0) + break; + + if (!sparse_keymap_report_event(hp_wmi_input_dev, + key_code, 1, true)) + pr_info("Unknown key code - 0x%x\n", key_code); + break; + case HPWMI_WIRELESS: + if (rfkill2_count) { + hp_wmi_rfkill2_refresh(); + break; + } + + if (wifi_rfkill) + rfkill_set_states(wifi_rfkill, + hp_wmi_get_sw_state(HPWMI_WIFI), + hp_wmi_get_hw_state(HPWMI_WIFI)); + if (bluetooth_rfkill) + rfkill_set_states(bluetooth_rfkill, + hp_wmi_get_sw_state(HPWMI_BLUETOOTH), + hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); + if (wwan_rfkill) + rfkill_set_states(wwan_rfkill, + hp_wmi_get_sw_state(HPWMI_WWAN), + hp_wmi_get_hw_state(HPWMI_WWAN)); + break; + case HPWMI_CPU_BATTERY_THROTTLE: + pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n"); + break; + case HPWMI_LOCK_SWITCH: + break; + case HPWMI_LID_SWITCH: + break; + case HPWMI_SCREEN_ROTATION: + break; + case HPWMI_COOLSENSE_SYSTEM_MOBILE: + break; + case HPWMI_COOLSENSE_SYSTEM_HOT: + break; + case HPWMI_PROXIMITY_SENSOR: + break; + case HPWMI_BACKLIT_KB_BRIGHTNESS: + break; + case HPWMI_PEAKSHIFT_PERIOD: + break; + case HPWMI_BATTERY_CHARGE_PERIOD: + break; + case HPWMI_SANITIZATION_MODE: + break; + case HPWMI_SMART_EXPERIENCE_APP: + break; + default: + pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data); + break; + } +} + +static int __init hp_wmi_input_setup(void) +{ + acpi_status status; + int err, val; + + hp_wmi_input_dev = input_allocate_device(); + if (!hp_wmi_input_dev) + return -ENOMEM; + + hp_wmi_input_dev->name = "HP WMI hotkeys"; + hp_wmi_input_dev->phys = "wmi/input0"; + hp_wmi_input_dev->id.bustype = BUS_HOST; + + __set_bit(EV_SW, hp_wmi_input_dev->evbit); + + /* Dock */ + val = hp_wmi_get_dock_state(); + if (!(val < 0)) { + __set_bit(SW_DOCK, hp_wmi_input_dev->swbit); + input_report_switch(hp_wmi_input_dev, SW_DOCK, val); + } + + /* Tablet mode */ + val = hp_wmi_get_tablet_mode(); + if (!(val < 0)) { + __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit); + input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val); + } + + err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL); + if (err) + goto err_free_dev; + + /* Set initial hardware state */ + input_sync(hp_wmi_input_dev); + + if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later()) + hp_wmi_enable_hotkeys(); + + status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL); + if (ACPI_FAILURE(status)) { + err = -EIO; + goto err_free_dev; + } + + err = input_register_device(hp_wmi_input_dev); + if (err) + goto err_uninstall_notifier; + + return 0; + + err_uninstall_notifier: + wmi_remove_notify_handler(HPWMI_EVENT_GUID); + err_free_dev: + input_free_device(hp_wmi_input_dev); + return err; +} + +static void hp_wmi_input_destroy(void) +{ + wmi_remove_notify_handler(HPWMI_EVENT_GUID); + input_unregister_device(hp_wmi_input_dev); +} + +static int __init hp_wmi_rfkill_setup(struct platform_device *device) +{ + int err, wireless; + + wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY); + if (wireless < 0) + return wireless; + + err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless, + sizeof(wireless), 0); + if (err) + return err; + + if (wireless & 0x1) { + wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev, + RFKILL_TYPE_WLAN, + &hp_wmi_rfkill_ops, + (void *) HPWMI_WIFI); + if (!wifi_rfkill) + return -ENOMEM; + rfkill_init_sw_state(wifi_rfkill, + hp_wmi_get_sw_state(HPWMI_WIFI)); + rfkill_set_hw_state(wifi_rfkill, + hp_wmi_get_hw_state(HPWMI_WIFI)); + err = rfkill_register(wifi_rfkill); + if (err) + goto register_wifi_error; + } + + if (wireless & 0x2) { + bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev, + RFKILL_TYPE_BLUETOOTH, + &hp_wmi_rfkill_ops, + (void *) HPWMI_BLUETOOTH); + if (!bluetooth_rfkill) { + err = -ENOMEM; + goto register_bluetooth_error; + } + rfkill_init_sw_state(bluetooth_rfkill, + hp_wmi_get_sw_state(HPWMI_BLUETOOTH)); + rfkill_set_hw_state(bluetooth_rfkill, + hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); + err = rfkill_register(bluetooth_rfkill); + if (err) + goto register_bluetooth_error; + } + + if (wireless & 0x4) { + wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev, + RFKILL_TYPE_WWAN, + &hp_wmi_rfkill_ops, + (void *) HPWMI_WWAN); + if (!wwan_rfkill) { + err = -ENOMEM; + goto register_wwan_error; + } + rfkill_init_sw_state(wwan_rfkill, + hp_wmi_get_sw_state(HPWMI_WWAN)); + rfkill_set_hw_state(wwan_rfkill, + hp_wmi_get_hw_state(HPWMI_WWAN)); + err = rfkill_register(wwan_rfkill); + if (err) + goto register_wwan_error; + } + + return 0; + +register_wwan_error: + rfkill_destroy(wwan_rfkill); + wwan_rfkill = NULL; + if (bluetooth_rfkill) + rfkill_unregister(bluetooth_rfkill); +register_bluetooth_error: + rfkill_destroy(bluetooth_rfkill); + bluetooth_rfkill = NULL; + if (wifi_rfkill) + rfkill_unregister(wifi_rfkill); +register_wifi_error: + rfkill_destroy(wifi_rfkill); + wifi_rfkill = NULL; + return err; +} + +static int __init hp_wmi_rfkill2_setup(struct platform_device *device) +{ + struct bios_rfkill2_state state; + int err, i; + + err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state, + zero_if_sup(state), sizeof(state)); + if (err) + return err < 0 ? err : -EINVAL; + + if (state.count > HPWMI_MAX_RFKILL2_DEVICES) { + pr_warn("unable to parse 0x1b query output\n"); + return -EINVAL; + } + + for (i = 0; i < state.count; i++) { + struct rfkill *rfkill; + enum rfkill_type type; + char *name; + + switch (state.device[i].radio_type) { + case HPWMI_WIFI: + type = RFKILL_TYPE_WLAN; + name = "hp-wifi"; + break; + case HPWMI_BLUETOOTH: + type = RFKILL_TYPE_BLUETOOTH; + name = "hp-bluetooth"; + break; + case HPWMI_WWAN: + type = RFKILL_TYPE_WWAN; + name = "hp-wwan"; + break; + case HPWMI_GPS: + type = RFKILL_TYPE_GPS; + name = "hp-gps"; + break; + default: + pr_warn("unknown device type 0x%x\n", + state.device[i].radio_type); + continue; + } + + if (!state.device[i].vendor_id) { + pr_warn("zero device %d while %d reported\n", + i, state.count); + continue; + } + + rfkill = rfkill_alloc(name, &device->dev, type, + &hp_wmi_rfkill2_ops, (void *)(long)i); + if (!rfkill) { + err = -ENOMEM; + goto fail; + } + + rfkill2[rfkill2_count].id = state.device[i].rfkill_id; + rfkill2[rfkill2_count].num = i; + rfkill2[rfkill2_count].rfkill = rfkill; + + rfkill_init_sw_state(rfkill, + IS_SWBLOCKED(state.device[i].power)); + rfkill_set_hw_state(rfkill, + IS_HWBLOCKED(state.device[i].power)); + + if (!(state.device[i].power & HPWMI_POWER_BIOS)) + pr_info("device %s blocked by BIOS\n", name); + + err = rfkill_register(rfkill); + if (err) { + rfkill_destroy(rfkill); + goto fail; + } + + rfkill2_count++; + } + + return 0; +fail: + for (; rfkill2_count > 0; rfkill2_count--) { + rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill); + rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill); + } + return err; +} + +static int platform_profile_omen_get(struct platform_profile_handler *pprof, + enum platform_profile_option *profile) +{ + int tp; + + tp = omen_thermal_profile_get(); + if (tp < 0) + return tp; + + switch (tp) { + case HP_OMEN_V0_THERMAL_PROFILE_PERFORMANCE: + case HP_OMEN_V1_THERMAL_PROFILE_PERFORMANCE: + *profile = PLATFORM_PROFILE_PERFORMANCE; + break; + case HP_OMEN_V0_THERMAL_PROFILE_DEFAULT: + case HP_OMEN_V1_THERMAL_PROFILE_DEFAULT: + *profile = PLATFORM_PROFILE_BALANCED; + break; + case HP_OMEN_V0_THERMAL_PROFILE_COOL: + case HP_OMEN_V1_THERMAL_PROFILE_COOL: + *profile = PLATFORM_PROFILE_COOL; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int platform_profile_omen_set(struct platform_profile_handler *pprof, + enum platform_profile_option profile) +{ + int err, tp, tp_version; + + tp_version = omen_get_thermal_policy_version(); + + if (tp_version < 0 || tp_version > 1) + return -EOPNOTSUPP; + + switch (profile) { + case PLATFORM_PROFILE_PERFORMANCE: + if (tp_version == 0) + tp = HP_OMEN_V0_THERMAL_PROFILE_PERFORMANCE; + else + tp = HP_OMEN_V1_THERMAL_PROFILE_PERFORMANCE; + break; + case PLATFORM_PROFILE_BALANCED: + if (tp_version == 0) + tp = HP_OMEN_V0_THERMAL_PROFILE_DEFAULT; + else + tp = HP_OMEN_V1_THERMAL_PROFILE_DEFAULT; + break; + case PLATFORM_PROFILE_COOL: + if (tp_version == 0) + tp = HP_OMEN_V0_THERMAL_PROFILE_COOL; + else + tp = HP_OMEN_V1_THERMAL_PROFILE_COOL; + break; + default: + return -EOPNOTSUPP; + } + + err = omen_thermal_profile_set(tp); + if (err < 0) + return err; + + return 0; +} + +static int thermal_profile_get(void) +{ + return hp_wmi_read_int(HPWMI_THERMAL_PROFILE_QUERY); +} + +static int thermal_profile_set(int thermal_profile) +{ + return hp_wmi_perform_query(HPWMI_THERMAL_PROFILE_QUERY, HPWMI_WRITE, &thermal_profile, + sizeof(thermal_profile), 0); +} + +static int hp_wmi_platform_profile_get(struct platform_profile_handler *pprof, + enum platform_profile_option *profile) +{ + int tp; + + tp = thermal_profile_get(); + if (tp < 0) + return tp; + + switch (tp) { + case HP_THERMAL_PROFILE_PERFORMANCE: + *profile = PLATFORM_PROFILE_PERFORMANCE; + break; + case HP_THERMAL_PROFILE_DEFAULT: + *profile = PLATFORM_PROFILE_BALANCED; + break; + case HP_THERMAL_PROFILE_COOL: + *profile = PLATFORM_PROFILE_COOL; + break; + case HP_THERMAL_PROFILE_QUIET: + *profile = PLATFORM_PROFILE_QUIET; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int hp_wmi_platform_profile_set(struct platform_profile_handler *pprof, + enum platform_profile_option profile) +{ + int err, tp; + + switch (profile) { + case PLATFORM_PROFILE_PERFORMANCE: + tp = HP_THERMAL_PROFILE_PERFORMANCE; + break; + case PLATFORM_PROFILE_BALANCED: + tp = HP_THERMAL_PROFILE_DEFAULT; + break; + case PLATFORM_PROFILE_COOL: + tp = HP_THERMAL_PROFILE_COOL; + break; + case PLATFORM_PROFILE_QUIET: + tp = HP_THERMAL_PROFILE_QUIET; + break; + default: + return -EOPNOTSUPP; + } + + err = thermal_profile_set(tp); + if (err) + return err; + + return 0; +} + +static int thermal_profile_setup(void) +{ + int err, tp; + + if (is_omen_thermal_profile()) { + tp = omen_thermal_profile_get(); + if (tp < 0) + return tp; + + /* + * call thermal profile write command to ensure that the + * firmware correctly sets the OEM variables + */ + + err = omen_thermal_profile_set(tp); + if (err < 0) + return err; + + platform_profile_handler.profile_get = platform_profile_omen_get; + platform_profile_handler.profile_set = platform_profile_omen_set; + } else { + tp = thermal_profile_get(); + + if (tp < 0) + return tp; + + /* + * call thermal profile write command to ensure that the + * firmware correctly sets the OEM variables for the DPTF + */ + err = thermal_profile_set(tp); + if (err) + return err; + + platform_profile_handler.profile_get = hp_wmi_platform_profile_get; + platform_profile_handler.profile_set = hp_wmi_platform_profile_set; + + set_bit(PLATFORM_PROFILE_QUIET, platform_profile_handler.choices); + } + + set_bit(PLATFORM_PROFILE_COOL, platform_profile_handler.choices); + set_bit(PLATFORM_PROFILE_BALANCED, platform_profile_handler.choices); + set_bit(PLATFORM_PROFILE_PERFORMANCE, platform_profile_handler.choices); + + err = platform_profile_register(&platform_profile_handler); + if (err) + return err; + + platform_profile_support = true; + + return 0; +} + +static int hp_wmi_hwmon_init(void); + +static int __init hp_wmi_bios_setup(struct platform_device *device) +{ + int err; + /* clear detected rfkill devices */ + wifi_rfkill = NULL; + bluetooth_rfkill = NULL; + wwan_rfkill = NULL; + rfkill2_count = 0; + + /* + * In pre-2009 BIOS, command 1Bh return 0x4 to indicate that + * BIOS no longer controls the power for the wireless + * devices. All features supported by this command will no + * longer be supported. + */ + if (!hp_wmi_bios_2009_later()) { + if (hp_wmi_rfkill_setup(device)) + hp_wmi_rfkill2_setup(device); + } + + err = hp_wmi_hwmon_init(); + + if (err < 0) + return err; + + thermal_profile_setup(); + + return 0; +} + +static int __exit hp_wmi_bios_remove(struct platform_device *device) +{ + int i; + + for (i = 0; i < rfkill2_count; i++) { + rfkill_unregister(rfkill2[i].rfkill); + rfkill_destroy(rfkill2[i].rfkill); + } + + if (wifi_rfkill) { + rfkill_unregister(wifi_rfkill); + rfkill_destroy(wifi_rfkill); + } + if (bluetooth_rfkill) { + rfkill_unregister(bluetooth_rfkill); + rfkill_destroy(bluetooth_rfkill); + } + if (wwan_rfkill) { + rfkill_unregister(wwan_rfkill); + rfkill_destroy(wwan_rfkill); + } + + if (platform_profile_support) + platform_profile_remove(); + + return 0; +} + +static int hp_wmi_resume_handler(struct device *device) +{ + /* + * Hardware state may have changed while suspended, so trigger + * input events for the current state. As this is a switch, + * the input layer will only actually pass it on if the state + * changed. + */ + if (hp_wmi_input_dev) { + if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit)) + input_report_switch(hp_wmi_input_dev, SW_DOCK, + hp_wmi_get_dock_state()); + if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit)) + input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, + hp_wmi_get_tablet_mode()); + input_sync(hp_wmi_input_dev); + } + + if (rfkill2_count) + hp_wmi_rfkill2_refresh(); + + if (wifi_rfkill) + rfkill_set_states(wifi_rfkill, + hp_wmi_get_sw_state(HPWMI_WIFI), + hp_wmi_get_hw_state(HPWMI_WIFI)); + if (bluetooth_rfkill) + rfkill_set_states(bluetooth_rfkill, + hp_wmi_get_sw_state(HPWMI_BLUETOOTH), + hp_wmi_get_hw_state(HPWMI_BLUETOOTH)); + if (wwan_rfkill) + rfkill_set_states(wwan_rfkill, + hp_wmi_get_sw_state(HPWMI_WWAN), + hp_wmi_get_hw_state(HPWMI_WWAN)); + + return 0; +} + +static const struct dev_pm_ops hp_wmi_pm_ops = { + .resume = hp_wmi_resume_handler, + .restore = hp_wmi_resume_handler, +}; + +/* + * hp_wmi_bios_remove() lives in .exit.text. For drivers registered via + * module_platform_driver_probe() this is ok because they cannot get unbound at + * runtime. So mark the driver struct with __refdata to prevent modpost + * triggering a section mismatch warning. + */ +static struct platform_driver hp_wmi_driver __refdata = { + .driver = { + .name = "hp-wmi", + .pm = &hp_wmi_pm_ops, + .dev_groups = hp_wmi_groups, + }, + .remove = __exit_p(hp_wmi_bios_remove), +}; + +static umode_t hp_wmi_hwmon_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + switch (type) { + case hwmon_pwm: + return 0644; + case hwmon_fan: + if (hp_wmi_get_fan_speed(channel) >= 0) + return 0444; + break; + default: + return 0; + } + + return 0; +} + +static int hp_wmi_hwmon_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + int ret; + + switch (type) { + case hwmon_fan: + ret = hp_wmi_get_fan_speed(channel); + + if (ret < 0) + return ret; + *val = ret; + return 0; + case hwmon_pwm: + switch (hp_wmi_fan_speed_max_get()) { + case 0: + /* 0 is automatic fan, which is 2 for hwmon */ + *val = 2; + return 0; + case 1: + /* 1 is max fan, which is 0 + * (no fan speed control) for hwmon + */ + *val = 0; + return 0; + default: + /* shouldn't happen */ + return -ENODATA; + } + default: + return -EINVAL; + } +} + +static int hp_wmi_hwmon_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + switch (type) { + case hwmon_pwm: + switch (val) { + case 0: + /* 0 is no fan speed control (max), which is 1 for us */ + return hp_wmi_fan_speed_max_set(1); + case 2: + /* 2 is automatic speed control, which is 0 for us */ + return hp_wmi_fan_speed_max_set(0); + default: + /* we don't support manual fan speed control */ + return -EINVAL; + } + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_channel_info *info[] = { + HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT, HWMON_F_INPUT), + HWMON_CHANNEL_INFO(pwm, HWMON_PWM_ENABLE), + NULL +}; + +static const struct hwmon_ops ops = { + .is_visible = hp_wmi_hwmon_is_visible, + .read = hp_wmi_hwmon_read, + .write = hp_wmi_hwmon_write, +}; + +static const struct hwmon_chip_info chip_info = { + .ops = &ops, + .info = info, +}; + +static int hp_wmi_hwmon_init(void) +{ + struct device *dev = &hp_wmi_platform_dev->dev; + struct device *hwmon; + + hwmon = devm_hwmon_device_register_with_info(dev, "hp", &hp_wmi_driver, + &chip_info, NULL); + + if (IS_ERR(hwmon)) { + dev_err(dev, "Could not register hp hwmon device\n"); + return PTR_ERR(hwmon); + } + + return 0; +} + +static int __init hp_wmi_init(void) +{ + int event_capable = wmi_has_guid(HPWMI_EVENT_GUID); + int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID); + int err, tmp = 0; + + if (!bios_capable && !event_capable) + return -ENODEV; + + if (hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, HPWMI_READ, &tmp, + sizeof(tmp), sizeof(tmp)) == HPWMI_RET_INVALID_PARAMETERS) + zero_insize_support = true; + + if (event_capable) { + err = hp_wmi_input_setup(); + if (err) + return err; + } + + if (bios_capable) { + hp_wmi_platform_dev = + platform_device_register_simple("hp-wmi", PLATFORM_DEVID_NONE, NULL, 0); + if (IS_ERR(hp_wmi_platform_dev)) { + err = PTR_ERR(hp_wmi_platform_dev); + goto err_destroy_input; + } + + err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup); + if (err) + goto err_unregister_device; + } + + return 0; + +err_unregister_device: + platform_device_unregister(hp_wmi_platform_dev); +err_destroy_input: + if (event_capable) + hp_wmi_input_destroy(); + + return err; +} +module_init(hp_wmi_init); + +static void __exit hp_wmi_exit(void) +{ + if (wmi_has_guid(HPWMI_EVENT_GUID)) + hp_wmi_input_destroy(); + + if (hp_wmi_platform_dev) { + platform_device_unregister(hp_wmi_platform_dev); + platform_driver_unregister(&hp_wmi_driver); + } +} +module_exit(hp_wmi_exit); |