diff options
Diffstat (limited to 'drivers/platform/x86/intel_oaktrail.c')
| -rw-r--r-- | drivers/platform/x86/intel_oaktrail.c | 397 |
1 files changed, 0 insertions, 397 deletions
diff --git a/drivers/platform/x86/intel_oaktrail.c b/drivers/platform/x86/intel_oaktrail.c deleted file mode 100644 index f6f18cde0f11..000000000000 --- a/drivers/platform/x86/intel_oaktrail.c +++ /dev/null @@ -1,397 +0,0 @@ -/* - * intel_oaktrail.c - Intel OakTrail Platform support. - * - * Copyright (C) 2010-2011 Intel Corporation - * Author: Yin Kangkai (kangkai.yin@intel.com) - * - * based on Compal driver, Copyright (C) 2008 Cezary Jackiewicz - * <cezary.jackiewicz (at) gmail.com>, based on MSI driver - * Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - * - * This driver does below things: - * 1. registers itself in the Linux backlight control in - * /sys/class/backlight/intel_oaktrail/ - * - * 2. registers in the rfkill subsystem here: /sys/class/rfkill/rfkillX/ - * for these components: wifi, bluetooth, wwan (3g), gps - * - * This driver might work on other products based on Oaktrail. If you - * want to try it you can pass force=1 as argument to the module which - * will force it to load even when the DMI data doesn't identify the - * product as compatible. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/acpi.h> -#include <linux/fb.h> -#include <linux/mutex.h> -#include <linux/err.h> -#include <linux/i2c.h> -#include <linux/backlight.h> -#include <linux/platform_device.h> -#include <linux/dmi.h> -#include <linux/rfkill.h> -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> - - -#define DRIVER_NAME "intel_oaktrail" -#define DRIVER_VERSION "0.4ac1" - -/* - * This is the devices status address in EC space, and the control bits - * definition: - * - * (1 << 0): Camera enable/disable, RW. - * (1 << 1): Bluetooth enable/disable, RW. - * (1 << 2): GPS enable/disable, RW. - * (1 << 3): WiFi enable/disable, RW. - * (1 << 4): WWAN (3G) enable/disalbe, RW. - * (1 << 5): Touchscreen enable/disable, Read Only. - */ -#define OT_EC_DEVICE_STATE_ADDRESS 0xD6 - -#define OT_EC_CAMERA_MASK (1 << 0) -#define OT_EC_BT_MASK (1 << 1) -#define OT_EC_GPS_MASK (1 << 2) -#define OT_EC_WIFI_MASK (1 << 3) -#define OT_EC_WWAN_MASK (1 << 4) -#define OT_EC_TS_MASK (1 << 5) - -/* - * This is the address in EC space and commands used to control LCD backlight: - * - * Two steps needed to change the LCD backlight: - * 1. write the backlight percentage into OT_EC_BL_BRIGHTNESS_ADDRESS; - * 2. write OT_EC_BL_CONTROL_ON_DATA into OT_EC_BL_CONTROL_ADDRESS. - * - * To read the LCD back light, just read out the value from - * OT_EC_BL_BRIGHTNESS_ADDRESS. - * - * LCD backlight brightness range: 0 - 100 (OT_EC_BL_BRIGHTNESS_MAX) - */ -#define OT_EC_BL_BRIGHTNESS_ADDRESS 0x44 -#define OT_EC_BL_BRIGHTNESS_MAX 100 -#define OT_EC_BL_CONTROL_ADDRESS 0x3A -#define OT_EC_BL_CONTROL_ON_DATA 0x1A - - -static bool force; -module_param(force, bool, 0); -MODULE_PARM_DESC(force, "Force driver load, ignore DMI data"); - -static struct platform_device *oaktrail_device; -static struct backlight_device *oaktrail_bl_device; -static struct rfkill *bt_rfkill; -static struct rfkill *gps_rfkill; -static struct rfkill *wifi_rfkill; -static struct rfkill *wwan_rfkill; - - -/* rfkill */ -static int oaktrail_rfkill_set(void *data, bool blocked) -{ - u8 value; - u8 result; - unsigned long radio = (unsigned long) data; - - ec_read(OT_EC_DEVICE_STATE_ADDRESS, &result); - - if (!blocked) - value = (u8) (result | radio); - else - value = (u8) (result & ~radio); - - ec_write(OT_EC_DEVICE_STATE_ADDRESS, value); - - return 0; -} - -static const struct rfkill_ops oaktrail_rfkill_ops = { - .set_block = oaktrail_rfkill_set, -}; - -static struct rfkill *oaktrail_rfkill_new(char *name, enum rfkill_type type, - unsigned long mask) -{ - struct rfkill *rfkill_dev; - u8 value; - int err; - - rfkill_dev = rfkill_alloc(name, &oaktrail_device->dev, type, - &oaktrail_rfkill_ops, (void *)mask); - if (!rfkill_dev) - return ERR_PTR(-ENOMEM); - - ec_read(OT_EC_DEVICE_STATE_ADDRESS, &value); - rfkill_init_sw_state(rfkill_dev, (value & mask) != 1); - - err = rfkill_register(rfkill_dev); - if (err) { - rfkill_destroy(rfkill_dev); - return ERR_PTR(err); - } - - return rfkill_dev; -} - -static inline void __oaktrail_rfkill_cleanup(struct rfkill *rf) -{ - if (rf) { - rfkill_unregister(rf); - rfkill_destroy(rf); - } -} - -static void oaktrail_rfkill_cleanup(void) -{ - __oaktrail_rfkill_cleanup(wifi_rfkill); - __oaktrail_rfkill_cleanup(bt_rfkill); - __oaktrail_rfkill_cleanup(gps_rfkill); - __oaktrail_rfkill_cleanup(wwan_rfkill); -} - -static int oaktrail_rfkill_init(void) -{ - int ret; - - wifi_rfkill = oaktrail_rfkill_new("oaktrail-wifi", - RFKILL_TYPE_WLAN, - OT_EC_WIFI_MASK); - if (IS_ERR(wifi_rfkill)) { - ret = PTR_ERR(wifi_rfkill); - wifi_rfkill = NULL; - goto cleanup; - } - - bt_rfkill = oaktrail_rfkill_new("oaktrail-bluetooth", - RFKILL_TYPE_BLUETOOTH, - OT_EC_BT_MASK); - if (IS_ERR(bt_rfkill)) { - ret = PTR_ERR(bt_rfkill); - bt_rfkill = NULL; - goto cleanup; - } - - gps_rfkill = oaktrail_rfkill_new("oaktrail-gps", - RFKILL_TYPE_GPS, - OT_EC_GPS_MASK); - if (IS_ERR(gps_rfkill)) { - ret = PTR_ERR(gps_rfkill); - gps_rfkill = NULL; - goto cleanup; - } - - wwan_rfkill = oaktrail_rfkill_new("oaktrail-wwan", - RFKILL_TYPE_WWAN, - OT_EC_WWAN_MASK); - if (IS_ERR(wwan_rfkill)) { - ret = PTR_ERR(wwan_rfkill); - wwan_rfkill = NULL; - goto cleanup; - } - - return 0; - -cleanup: - oaktrail_rfkill_cleanup(); - return ret; -} - - -/* backlight */ -static int get_backlight_brightness(struct backlight_device *b) -{ - u8 value; - ec_read(OT_EC_BL_BRIGHTNESS_ADDRESS, &value); - - return value; -} - -static int set_backlight_brightness(struct backlight_device *b) -{ - u8 percent = (u8) b->props.brightness; - if (percent < 0 || percent > OT_EC_BL_BRIGHTNESS_MAX) - return -EINVAL; - - ec_write(OT_EC_BL_BRIGHTNESS_ADDRESS, percent); - ec_write(OT_EC_BL_CONTROL_ADDRESS, OT_EC_BL_CONTROL_ON_DATA); - - return 0; -} - -static const struct backlight_ops oaktrail_bl_ops = { - .get_brightness = get_backlight_brightness, - .update_status = set_backlight_brightness, -}; - -static int oaktrail_backlight_init(void) -{ - struct backlight_device *bd; - struct backlight_properties props; - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_PLATFORM; - props.max_brightness = OT_EC_BL_BRIGHTNESS_MAX; - bd = backlight_device_register(DRIVER_NAME, - &oaktrail_device->dev, NULL, - &oaktrail_bl_ops, - &props); - - if (IS_ERR(bd)) { - oaktrail_bl_device = NULL; - pr_warning("Unable to register backlight device\n"); - return PTR_ERR(bd); - } - - oaktrail_bl_device = bd; - - bd->props.brightness = get_backlight_brightness(bd); - bd->props.power = FB_BLANK_UNBLANK; - backlight_update_status(bd); - - return 0; -} - -static void oaktrail_backlight_exit(void) -{ - if (oaktrail_bl_device) - backlight_device_unregister(oaktrail_bl_device); -} - -static int oaktrail_probe(struct platform_device *pdev) -{ - return 0; -} - -static int oaktrail_remove(struct platform_device *pdev) -{ - return 0; -} - -static struct platform_driver oaktrail_driver = { - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, - .probe = oaktrail_probe, - .remove = oaktrail_remove, -}; - -static int dmi_check_cb(const struct dmi_system_id *id) -{ - pr_info("Identified model '%s'\n", id->ident); - return 0; -} - -static struct dmi_system_id __initdata oaktrail_dmi_table[] = { - { - .ident = "OakTrail platform", - .matches = { - DMI_MATCH(DMI_PRODUCT_NAME, "OakTrail platform"), - }, - .callback = dmi_check_cb - }, - { } -}; -MODULE_DEVICE_TABLE(dmi, oaktrail_dmi_table); - -static int __init oaktrail_init(void) -{ - int ret; - - if (acpi_disabled) { - pr_err("ACPI needs to be enabled for this driver to work!\n"); - return -ENODEV; - } - - if (!force && !dmi_check_system(oaktrail_dmi_table)) { - pr_err("Platform not recognized (You could try the module's force-parameter)"); - return -ENODEV; - } - - ret = platform_driver_register(&oaktrail_driver); - if (ret) { - pr_warning("Unable to register platform driver\n"); - goto err_driver_reg; - } - - oaktrail_device = platform_device_alloc(DRIVER_NAME, -1); - if (!oaktrail_device) { - pr_warning("Unable to allocate platform device\n"); - ret = -ENOMEM; - goto err_device_alloc; - } - - ret = platform_device_add(oaktrail_device); - if (ret) { - pr_warning("Unable to add platform device\n"); - goto err_device_add; - } - - if (!acpi_video_backlight_support()) { - ret = oaktrail_backlight_init(); - if (ret) - goto err_backlight; - - } else - pr_info("Backlight controlled by ACPI video driver\n"); - - ret = oaktrail_rfkill_init(); - if (ret) { - pr_warning("Setup rfkill failed\n"); - goto err_rfkill; - } - - pr_info("Driver "DRIVER_VERSION" successfully loaded\n"); - return 0; - -err_rfkill: - oaktrail_backlight_exit(); -err_backlight: - platform_device_del(oaktrail_device); -err_device_add: - platform_device_put(oaktrail_device); -err_device_alloc: - platform_driver_unregister(&oaktrail_driver); -err_driver_reg: - - return ret; -} - -static void __exit oaktrail_cleanup(void) -{ - oaktrail_backlight_exit(); - oaktrail_rfkill_cleanup(); - platform_device_unregister(oaktrail_device); - platform_driver_unregister(&oaktrail_driver); - - pr_info("Driver unloaded\n"); -} - -module_init(oaktrail_init); -module_exit(oaktrail_cleanup); - -MODULE_AUTHOR("Yin Kangkai (kangkai.yin@intel.com)"); -MODULE_DESCRIPTION("Intel Oaktrail Platform ACPI Extras"); -MODULE_VERSION(DRIVER_VERSION); -MODULE_LICENSE("GPL"); |