From patchwork Mon Aug 15 12:48:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Huacai Chen X-Patchwork-Id: 12943517 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9F92C00140 for ; Mon, 15 Aug 2022 12:50:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231134AbiHOMuB (ORCPT ); Mon, 15 Aug 2022 08:50:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230516AbiHOMuA (ORCPT ); Mon, 15 Aug 2022 08:50:00 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6705D12AD0; Mon, 15 Aug 2022 05:49:58 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id ED502B80E34; Mon, 15 Aug 2022 12:49:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 37EBCC433C1; Mon, 15 Aug 2022 12:49:52 +0000 (UTC) From: Huacai Chen To: Arnd Bergmann , Huacai Chen , "Rafael J . Wysocki" , Len Brown , Robert Moore , Erik Kaneda Cc: loongarch@lists.linux.dev, linux-arch@vger.kernel.org, linux-acpi@vger.kernel.org, Xuefeng Li , Jianmin Lv , Jiaxun Yang , Huacai Chen Subject: [PATCH 2/2] LoongArch: Add ACPI-based generic laptop driver Date: Mon, 15 Aug 2022 20:48:03 +0800 Message-Id: <20220815124803.3332991-2-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220815124803.3332991-1-chenhuacai@loongson.cn> References: <20220815124803.3332991-1-chenhuacai@loongson.cn> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Jianmin Lv This add ACPI-based generic laptop driver for Loongson-3. Some of the codes are derived from drivers/platform/x86/thinkpad_acpi.c. Signed-off-by: Jianmin Lv Signed-off-by: Huacai Chen Reported-by: kernel test robot --- drivers/platform/loongarch/Kconfig | 18 + drivers/platform/loongarch/Makefile | 1 + drivers/platform/loongarch/generic-laptop.c | 775 ++++++++++++++++++++ 3 files changed, 794 insertions(+) create mode 100644 drivers/platform/loongarch/generic-laptop.c diff --git a/drivers/platform/loongarch/Kconfig b/drivers/platform/loongarch/Kconfig index a1542843b0ad..086212d57251 100644 --- a/drivers/platform/loongarch/Kconfig +++ b/drivers/platform/loongarch/Kconfig @@ -23,4 +23,22 @@ config CPU_HWMON help Loongson-3A/3B/3C CPU HWMon (temperature sensor) driver. +config GENERIC_LAPTOP + tristate "Generic Loongson-3A Laptop Driver" + depends on MACH_LOONGSON64 + depends on ACPI + depends on INPUT + select BACKLIGHT_CLASS_DEVICE + select BACKLIGHT_LCD_SUPPORT + select HWMON + select INPUT_EVDEV + select INPUT_SPARSEKMAP + select LCD_CLASS_DEVICE + select LEDS_CLASS + select POWER_SUPPLY + select VIDEO_OUTPUT_CONTROL + default y + help + ACPI-based Loongson-3 family laptops generic driver. + endif # LOONGARCH_PLATFORM_DEVICES diff --git a/drivers/platform/loongarch/Makefile b/drivers/platform/loongarch/Makefile index 8dfd03924c37..9d6f69f2319d 100644 --- a/drivers/platform/loongarch/Makefile +++ b/drivers/platform/loongarch/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o +obj-$(CONFIG_GENERIC_LAPTOP) += generic-laptop.o diff --git a/drivers/platform/loongarch/generic-laptop.c b/drivers/platform/loongarch/generic-laptop.c new file mode 100644 index 000000000000..90e37a02511d --- /dev/null +++ b/drivers/platform/loongarch/generic-laptop.c @@ -0,0 +1,775 @@ +/* + * Generic Loongson processor based LAPTOP/ALL-IN-ONE driver + * + * Jianmin Lv + * Huacai Chen + * + * Copyright (C) 2022 Loongson Technology Corporation Limited + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* ACPI HIDs */ +#define LOONGSON_ACPI_HKEY_HID "LOON0000" +#define LOONGSON_ACPI_EC_HID "PNP0C09" + +/**************************************************************************** + * Main driver + */ + +#define ACPI_LAPTOP_VERSION "1.0" +#define ACPI_LAPTOP_NAME "loongson-laptop" +#define ACPI_LAPTOP_DESC "Loongson Laptop/all-in-one ACPI Driver" +#define ACPI_LAPTOP_FILE ACPI_LAPTOP_NAME "_acpi" +#define ACPI_LAPTOP_DRVR_NAME ACPI_LAPTOP_FILE +#define ACPI_LAPTOP_ACPI_EVENT_PREFIX "loongson" +/**************************************************************************** + * Driver-wide structs and misc. variables + */ + +struct generic_struct; + +struct generic_acpi_drv_struct { + u32 type; + acpi_handle *handle; + const struct acpi_device_id *hid; + struct acpi_device *device; + struct acpi_driver *driver; + void (*notify)(struct generic_struct *, u32); +}; + +struct generic_struct { + char *name; + + int (*init)(struct generic_struct *); + + struct generic_acpi_drv_struct *acpi; + + struct { + u8 acpi_driver_registered; + u8 acpi_notify_installed; + } flags; +}; + + +static struct { + u32 input_device_registered:1; +} generic_features; + +static int hotkey_status_get(int *status); +static int loongson_laptop_backlight_update(struct backlight_device *bd); + +/**************************************************************************** + **************************************************************************** + * + * ACPI Helpers and device model + * + **************************************************************************** + ****************************************************************************/ + +/* ACPI basic handles */ + +static int acpi_evalf(acpi_handle handle, + int *res, char *method, char *fmt, ...); +static acpi_handle ec_handle; + +#define GENERIC_HANDLE(object, parent, paths...) \ + static acpi_handle object##_handle; \ + static const acpi_handle * const object##_parent __initconst = \ + &parent##_handle; \ + static char *object##_paths[] __initdata = { paths } + +GENERIC_HANDLE(hkey, ec, "\\_SB.HKEY", "^HKEY", "HKEY",); + +/* ACPI device model */ + +#define GENERIC_ACPIHANDLE_INIT(object) \ + drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ + object##_paths, ARRAY_SIZE(object##_paths)) + +static void __init drv_acpi_handle_init(const char *name, + acpi_handle *handle, const acpi_handle parent, + char **paths, const int num_paths) +{ + int i; + acpi_status status; + + for (i = 0; i < num_paths; i++) { + status = acpi_get_handle(parent, paths[i], handle); + if (ACPI_SUCCESS(status)) + return; + } + + *handle = NULL; +} +static acpi_status __init generic_acpi_handle_locate_callback(acpi_handle handle, + u32 level, void *context, void **return_value) +{ + *(acpi_handle *)return_value = handle; + + return AE_CTRL_TERMINATE; +} + +static void __init generic_acpi_handle_locate(const char *name, + const char *hid, acpi_handle *handle) +{ + acpi_status status; + acpi_handle device_found; + + BUG_ON(!name || !hid || !handle); + + *handle = NULL; + + memset(&device_found, 0, sizeof(device_found)); + status = acpi_get_devices(hid, generic_acpi_handle_locate_callback, + (void *)name, &device_found); + + if (ACPI_SUCCESS(status)) + *handle = device_found; +} + +static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) +{ + struct generic_struct *sub_driver = data; + + if (!sub_driver || !sub_driver->acpi || !sub_driver->acpi->notify) + return; + sub_driver->acpi->notify(sub_driver, event); +} + +static int __init setup_acpi_notify(struct generic_struct *sub_driver) +{ + acpi_status status; + + BUG_ON(!sub_driver->acpi); + + if (!*sub_driver->acpi->handle) + return 0; + + sub_driver->acpi->device = acpi_fetch_acpi_dev(*sub_driver->acpi->handle); + if (!sub_driver->acpi->device) { + pr_err("acpi_fetch_acpi_dev(%s) failed\n", sub_driver->name); + return -ENODEV; + } + + sub_driver->acpi->device->driver_data = sub_driver; + sprintf(acpi_device_class(sub_driver->acpi->device), "%s/%s", + ACPI_LAPTOP_ACPI_EVENT_PREFIX, + sub_driver->name); + + status = acpi_install_notify_handler(*sub_driver->acpi->handle, + sub_driver->acpi->type, dispatch_acpi_notify, sub_driver); + if (ACPI_FAILURE(status)) { + if (status == AE_ALREADY_EXISTS) { + pr_notice("another device driver is already " + "handling %s events\n", sub_driver->name); + } else { + pr_err("acpi_install_notify_handler(%s) failed: %s\n", + sub_driver->name, acpi_format_exception(status)); + } + return -ENODEV; + } + sub_driver->flags.acpi_notify_installed = 1; + return 0; +} + +static int __init tpacpi_device_add(struct acpi_device *device) +{ + return 0; +} + +static struct input_dev *generic_inputdev; + +#ifdef CONFIG_PM +static int loongson_generic_suspend(struct device *dev) +{ + return 0; +} +static int loongson_generic_resume(struct device *dev) +{ + int status = 0; + struct key_entry ke; + struct backlight_device *bd; + + /* + * Only if the firmware supports SW_LID event model, we can handle the + * event. This is for the consideration of development board without + * EC. + */ + if (test_bit(SW_LID, generic_inputdev->swbit)) { + if (hotkey_status_get(&status)) + return -EIO; + /* + * The input device sw element records the last lid status. + * When the system is awakened by other wake-up sources, + * the lid event will also be reported. The judgment of + * adding SW_LID bit which in sw element can avoid this + * case. + * + * input system will drop lid event when current lid event + * value and last lid status in the same data set，which + * data set inclue zero set and no zero set. so laptop + * driver doesn't report repeated events. + * + * Lid status is generally 0, but hardware exception is + * considered. So add lid status confirmation. + */ + if (test_bit(SW_LID, generic_inputdev->sw) && !(status & (1 << SW_LID))) { + ke.type = KE_SW; + ke.sw.value = (u8)status; + ke.sw.code = SW_LID; + sparse_keymap_report_entry(generic_inputdev, &ke, + 1, true); + } + } + + bd = backlight_device_get_by_type(BACKLIGHT_PLATFORM); + if (bd) { + loongson_laptop_backlight_update(bd) ? + pr_warn("Loongson_backlight:resume brightness failed") : + pr_info("Loongson_backlight:resume brightness %d\n", bd->props.brightness); + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(loongson_generic_pm, + loongson_generic_suspend, loongson_generic_resume); +#endif + +static int __init register_generic_subdriver(struct generic_struct *sub_driver) +{ + int rc; + + BUG_ON(!sub_driver->acpi); + + sub_driver->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); + if (!sub_driver->acpi->driver) { + pr_err("failed to allocate memory for ibm->acpi->driver\n"); + return -ENOMEM; + } + + sprintf(sub_driver->acpi->driver->name, "%s_%s", ACPI_LAPTOP_NAME, sub_driver->name); + sub_driver->acpi->driver->ids = sub_driver->acpi->hid; + sub_driver->acpi->driver->ops.add = &tpacpi_device_add; +#ifdef CONFIG_PM + sub_driver->acpi->driver->drv.pm = &loongson_generic_pm; +#endif + rc = acpi_bus_register_driver(sub_driver->acpi->driver); + if (rc < 0) { + pr_err("acpi_bus_register_driver(%s) failed: %d\n", + sub_driver->name, rc); + kfree(sub_driver->acpi->driver); + sub_driver->acpi->driver = NULL; + } else if (!rc) + sub_driver->flags.acpi_driver_registered = 1; + + return rc; +} + +/* Loongson generic laptop firmware event model */ + +#define GENERIC_HOTKEY_MAP_MAX 64 +#define METHOD_NAME__KMAP "KMAP" +static struct key_entry hotkey_keycode_map[GENERIC_HOTKEY_MAP_MAX]; + +static int hkey_map(void) +{ + u32 index; + acpi_status status; + struct acpi_buffer buf; + union acpi_object *pack; + + buf.length = ACPI_ALLOCATE_BUFFER; + status = acpi_evaluate_object_typed(hkey_handle, METHOD_NAME__KMAP, NULL, &buf, ACPI_TYPE_PACKAGE); + if (status != AE_OK) { + printk(KERN_ERR ": ACPI exception: %s\n", + acpi_format_exception(status)); + return -1; + } + pack = buf.pointer; + for (index = 0; index < pack->package.count; index++) { + union acpi_object *sub_pack = &pack->package.elements[index]; + union acpi_object *element = &sub_pack->package.elements[0]; + + hotkey_keycode_map[index].type = element->integer.value; + element = &sub_pack->package.elements[1]; + hotkey_keycode_map[index].code = element->integer.value; + element = &sub_pack->package.elements[2]; + hotkey_keycode_map[index].keycode = element->integer.value; + } + + return 0; +} + +static int hotkey_backlight_set(bool enable) +{ + if (!acpi_evalf(hkey_handle, NULL, "VCBL", "vd", enable ? 1 : 0)) + return -EIO; + + return 0; +} + +static int __init event_init(struct generic_struct *sub_driver) +{ + int ret; + + GENERIC_ACPIHANDLE_INIT(hkey); + ret = hkey_map(); + if (ret) { + printk(KERN_ERR "Fail to parse keymap from DSDT.\n"); + return ret; + } + + ret = sparse_keymap_setup(generic_inputdev, hotkey_keycode_map, NULL); + if (ret) { + printk(KERN_ERR "Fail to setup input device keymap\n"); + input_free_device(generic_inputdev); + + return ret; + } + + /* + * This hotkey driver handle backlight event when + * acpi_video_get_backlight_type() gets acpi_backlight_vendor + */ + if (acpi_video_get_backlight_type() != acpi_backlight_vendor) + hotkey_backlight_set(false); + else + hotkey_backlight_set(true); + + printk("ACPI:enabling firmware HKEY event interface...\n"); + + return ret; +} + +#define GENERIC_EVENT_TYPE_OFF 12 +#define GENERIC_EVENT_MASK 0xFFF +#define TPACPI_MAX_ACPI_ARGS 3 + +static int acpi_evalf(acpi_handle handle, + int *res, char *method, char *fmt, ...) +{ + char res_type; + char *fmt0 = fmt; + va_list ap; + int success, quiet; + acpi_status status; + struct acpi_object_list params; + struct acpi_buffer result, *resultp; + union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS], out_obj; + + if (!*fmt) { + pr_err("acpi_evalf() called with empty format\n"); + return 0; + } + + if (*fmt == 'q') { + quiet = 1; + fmt++; + } else + quiet = 0; + + res_type = *(fmt++); + + params.count = 0; + params.pointer = &in_objs[0]; + + va_start(ap, fmt); + while (*fmt) { + char c = *(fmt++); + switch (c) { + case 'd': /* int */ + in_objs[params.count].integer.value = va_arg(ap, int); + in_objs[params.count++].type = ACPI_TYPE_INTEGER; + break; + /* add more types as needed */ + default: + pr_err("acpi_evalf() called with invalid format character '%c'\n", + c); + va_end(ap); + return 0; + } + } + va_end(ap); + + if (res_type != 'v') { + result.length = sizeof(out_obj); + result.pointer = &out_obj; + resultp = &result; + } else + resultp = NULL; + + status = acpi_evaluate_object(handle, method, ¶ms, resultp); + + switch (res_type) { + case 'd': /* int */ + success = (status == AE_OK && + out_obj.type == ACPI_TYPE_INTEGER); + if (success && res) + *res = out_obj.integer.value; + break; + case 'v': /* void */ + success = status == AE_OK; + break; + /* add more types as needed */ + default: + pr_err("acpi_evalf() called with invalid format character '%c'\n", + res_type); + return 0; + } + + if (!success && !quiet) + pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", + method, fmt0, acpi_format_exception(status)); + + return success; +} + +int ec_get_brightness(void) +{ + int status = 0; + + if (!hkey_handle) + return -ENXIO; + + if (!acpi_evalf(hkey_handle, &status, "ECBG", "d")) + return -EIO; + + if (status < 0) + return status; + + return status; +} +EXPORT_SYMBOL(ec_get_brightness); + +int ec_set_brightness(int level) +{ + + int ret = 0; + + if (!hkey_handle) + return -ENXIO; + + if (!acpi_evalf(hkey_handle, NULL, "ECBS", "vd", level)) + ret = -EIO; + + return ret; +} +EXPORT_SYMBOL(ec_set_brightness); + +int ec_backlight_level(u8 level) +{ + int status = 0; + + if (!hkey_handle) + return -ENXIO; + + if (!acpi_evalf(hkey_handle, &status, "ECLL", "d")) + return -EIO; + + if ((status < 0) || (level > status)) + return status; + + if (!acpi_evalf(hkey_handle, &status, "ECSL", "d")) + return -EIO; + + if ((status < 0) || (level < status)) + return status; + + return level; +} +EXPORT_SYMBOL(ec_backlight_level); + +static int loongson_laptop_backlight_update(struct backlight_device *bd) +{ + int lvl = ec_backlight_level(bd->props.brightness); + + if (lvl < 0) + return -EIO; + if (ec_set_brightness(lvl)) + return -EIO; + + return 0; +} + +static int loongson_laptop_get_brightness(struct backlight_device *bd) +{ + u8 level; + + level = ec_get_brightness(); + if (level < 0) + return -EIO; + + return level; +} + +static const struct backlight_ops backlight_laptop_ops = { + .update_status = loongson_laptop_backlight_update, + .get_brightness = loongson_laptop_get_brightness, +}; + +static int laptop_backlight_register(void) +{ + int status = 0; + struct backlight_properties props; + + memset(&props, 0, sizeof(props)); + props.type = BACKLIGHT_PLATFORM; + + if (!acpi_evalf(hkey_handle, &status, "ECLL", "d")) + return -EIO; + + props.brightness = 1; + props.max_brightness = status; + + backlight_device_register("loongson_laptop", + NULL, NULL, &backlight_laptop_ops, &props); + + return 0; +} + +int turn_on_backlight(void) +{ + int status; + union acpi_object arg0 = { ACPI_TYPE_INTEGER }; + struct acpi_object_list args = { 1, &arg0 }; + + arg0.integer.value = 1; + status = acpi_evaluate_object(NULL, "\\BLSW", &args, NULL); + if (ACPI_FAILURE(status)) { + pr_info("Loongson lvds error: 0x%x\n", status); + return -ENODEV; + } + + return 0; +} + +int turn_off_backlight(void) +{ + int status; + union acpi_object arg0 = { ACPI_TYPE_INTEGER }; + struct acpi_object_list args = { 1, &arg0 }; + + arg0.integer.value = 0; + status = acpi_evaluate_object(NULL, "\\BLSW", &args, NULL); + if (ACPI_FAILURE(status)) { + pr_info("Loongson lvds error: 0x%x\n", status); + return -ENODEV; + } + + return 0; +} + +static int hotkey_status_get(int *status) +{ + if (!acpi_evalf(hkey_handle, status, "GSWS", "d")) + return -EIO; + + return 0; +} + +static void event_notify(struct generic_struct *sub_driver, u32 event) +{ + struct key_entry *ke = NULL; + int scan_code = event & GENERIC_EVENT_MASK; + int type = (event >> GENERIC_EVENT_TYPE_OFF) & 0xF; + + ke = sparse_keymap_entry_from_scancode(generic_inputdev, scan_code); + if (ke) { + if (type == KE_SW) { + int status = 0; + + if (hotkey_status_get(&status)) + return; + + ke->sw.value = !!(status & (1 << ke->sw.code)); + } + sparse_keymap_report_entry(generic_inputdev, ke, 1, true); + } +} + +static const struct acpi_device_id loongson_htk_device_ids[] = { + {LOONGSON_ACPI_HKEY_HID, 0}, + {"", 0}, +}; + +static struct generic_acpi_drv_struct ec_event_acpidriver = { + .hid = loongson_htk_device_ids, + .notify = event_notify, + .handle = &hkey_handle, + .type = ACPI_DEVICE_NOTIFY, +}; + +/**************************************************************************** + **************************************************************************** + * + * Infrastructure + * + **************************************************************************** + ****************************************************************************/ +static int __init probe_for_generic(void) +{ + if (acpi_disabled) + return -ENODEV; + + /* The EC handler is required */ + generic_acpi_handle_locate("ec", LOONGSON_ACPI_EC_HID, &ec_handle); + if (!ec_handle) { + pr_err("Not yet supported Loongson Generic Laptop/All-in-one detected!\n"); + return -ENODEV; + } + + return 0; +} + +static void generic_exit(struct generic_struct *sub_driver) +{ + + if (sub_driver->flags.acpi_notify_installed) { + BUG_ON(!sub_driver->acpi); + acpi_remove_notify_handler(*sub_driver->acpi->handle, + sub_driver->acpi->type, + dispatch_acpi_notify); + sub_driver->flags.acpi_notify_installed = 0; + } + + if (sub_driver->flags.acpi_driver_registered) { + BUG_ON(!sub_driver->acpi); + acpi_bus_unregister_driver(sub_driver->acpi->driver); + kfree(sub_driver->acpi->driver); + sub_driver->acpi->driver = NULL; + sub_driver->flags.acpi_driver_registered = 0; + } + +} + +static int __init generic_subdriver_init(struct generic_struct *sub_driver) +{ + int ret; + + BUG_ON(sub_driver == NULL); + + if (sub_driver->init) + sub_driver->init(sub_driver); + + if (sub_driver->acpi) { + if (sub_driver->acpi->hid) { + ret = register_generic_subdriver(sub_driver); + if (ret) + goto err_out; + } + + if (sub_driver->acpi->notify) { + ret = setup_acpi_notify(sub_driver); + if (ret == -ENODEV) { + ret = 0; + goto err_out; + } + if (ret < 0) + goto err_out; + } + } + + return 0; + +err_out: + generic_exit(sub_driver); + return (ret < 0) ? ret : 0; +} + +/* Module init, exit, parameters */ +static struct generic_struct generic_sub_drivers[] __initdata = { + { + .name = "EC Event", + .init = event_init, + .acpi = &ec_event_acpidriver, + }, +}; + +static void generic_acpi_laptop_exit(void); + +static int __init generic_acpi_laptop_init(void) +{ + int i, ret, status; + + ret = probe_for_generic(); + if (ret) { + generic_acpi_laptop_exit(); + return ret; + } + generic_inputdev = input_allocate_device(); + if (!generic_inputdev) { + pr_err("unable to allocate input device\n"); + generic_acpi_laptop_exit(); + return -ENOMEM; + } + + /* Prepare input device, but don't register */ + generic_inputdev->name = + "Loongson Generic Laptop/All-in-one Extra Buttons"; + generic_inputdev->phys = ACPI_LAPTOP_DRVR_NAME "/input0"; + generic_inputdev->id.bustype = BUS_HOST; + generic_inputdev->dev.parent = NULL; + + /* Init subdrivers */ + for (i = 0; i < ARRAY_SIZE(generic_sub_drivers); i++) { + ret = generic_subdriver_init(&generic_sub_drivers[i]); + if (ret < 0) { + generic_acpi_laptop_exit(); + return ret; + } + } + + ret = input_register_device(generic_inputdev); + if (ret < 0) { + pr_err("unable to register input device\n"); + generic_acpi_laptop_exit(); + return ret; + } + + generic_features.input_device_registered = 1; + + if (acpi_evalf(hkey_handle, &status, "ECBG", "d")) { + pr_info("Loongson Laptop used, init brightness is 0x%x\n", status); + ret = laptop_backlight_register(); + if (ret < 0) + pr_err("Loongson Laptop: laptop-backlight device register failed\n"); + } + + return 0; +} + +static void __exit generic_acpi_laptop_exit(void) +{ + if (generic_inputdev) { + if (generic_features.input_device_registered) + input_unregister_device(generic_inputdev); + else + input_free_device(generic_inputdev); + } +} + +module_init(generic_acpi_laptop_init); +module_exit(generic_acpi_laptop_exit); + +MODULE_ALIAS("platform:acpi-laptop"); +MODULE_AUTHOR("Jianmin Lv "); +MODULE_AUTHOR("Huacai Chen "); +MODULE_DESCRIPTION(ACPI_LAPTOP_DESC); +MODULE_VERSION(ACPI_LAPTOP_VERSION); +MODULE_LICENSE("GPL");