ideapad-laptop.c

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/*
 *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
 *
 *  Copyright © 2010 Intel Corporation
 *  Copyright © 2010 David Woodhouse <[email protected]>
 *
 *  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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/rfkill.h>
#include <linux/platform_device.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/i8042.h>

#define IDEAPAD_RFKILL_DEV_NUM  (3)

#define CFG_BT_BIT  (16)
#define CFG_3G_BIT  (17)
#define CFG_WIFI_BIT    (18)
#define CFG_CAMERA_BIT  (19)

enum {
    VPCCMD_R_VPC1 = 0x10,
    VPCCMD_R_BL_MAX,
    VPCCMD_R_BL,
    VPCCMD_W_BL,
    VPCCMD_R_WIFI,
    VPCCMD_W_WIFI,
    VPCCMD_R_BT,
    VPCCMD_W_BT,
    VPCCMD_R_BL_POWER,
    VPCCMD_R_NOVO,
    VPCCMD_R_VPC2,
    VPCCMD_R_TOUCHPAD,
    VPCCMD_W_TOUCHPAD,
    VPCCMD_R_CAMERA,
    VPCCMD_W_CAMERA,
    VPCCMD_R_3G,
    VPCCMD_W_3G,
    VPCCMD_R_ODD, /* 0x21 */
    VPCCMD_W_FAN,
    VPCCMD_R_RF,
    VPCCMD_W_RF,
    VPCCMD_R_FAN = 0x2B,
    VPCCMD_R_SPECIAL_BUTTONS = 0x31,
    VPCCMD_W_BL_POWER = 0x33,
};

struct ideapad_private {
    struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
    struct platform_device *platform_device;
    struct input_dev *inputdev;
    struct backlight_device *blightdev;
    struct dentry *debug;
    unsigned long cfg;
};

static acpi_handle ideapad_handle;
static struct ideapad_private *ideapad_priv;
static bool no_bt_rfkill;
module_param(no_bt_rfkill, bool, 0444);
MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");

/*
 * ACPI Helpers
 */
#define IDEAPAD_EC_TIMEOUT (100) /* in ms */

static int read_method_int(acpi_handle handle, const char *method, int *val)
{
    acpi_status status;
    unsigned long long result;

    status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
    if (ACPI_FAILURE(status)) {
        *val = -1;
        return -1;
    } else {
        *val = result;
        return 0;
    }
}

static int method_vpcr(acpi_handle handle, int cmd, int *ret)
{
    acpi_status status;
    unsigned long long result;
    struct acpi_object_list params;
    union acpi_object in_obj;

    params.count = 1;
    params.pointer = &in_obj;
    in_obj.type = ACPI_TYPE_INTEGER;
    in_obj.integer.value = cmd;

    status = acpi_evaluate_integer(handle, "VPCR", &params, &result);

    if (ACPI_FAILURE(status)) {
        *ret = -1;
        return -1;
    } else {
        *ret = result;
        return 0;
    }
}

static int method_vpcw(acpi_handle handle, int cmd, int data)
{
    struct acpi_object_list params;
    union acpi_object in_obj[2];
    acpi_status status;

    params.count = 2;
    params.pointer = in_obj;
    in_obj[0].type = ACPI_TYPE_INTEGER;
    in_obj[0].integer.value = cmd;
    in_obj[1].type = ACPI_TYPE_INTEGER;
    in_obj[1].integer.value = data;

    status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
    if (status != AE_OK)
        return -1;
    return 0;
}

static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
{
    int val;
    unsigned long int end_jiffies;

    if (method_vpcw(handle, 1, cmd))
        return -1;

    for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
         time_before(jiffies, end_jiffies);) {
        schedule();
        if (method_vpcr(handle, 1, &val))
            return -1;
        if (val == 0) {
            if (method_vpcr(handle, 0, &val))
                return -1;
            *data = val;
            return 0;
        }
    }
    pr_err("timeout in read_ec_cmd\n");
    return -1;
}

static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
{
    int val;
    unsigned long int end_jiffies;

    if (method_vpcw(handle, 0, data))
        return -1;
    if (method_vpcw(handle, 1, cmd))
        return -1;

    for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
         time_before(jiffies, end_jiffies);) {
        schedule();
        if (method_vpcr(handle, 1, &val))
            return -1;
        if (val == 0)
            return 0;
    }
    pr_err("timeout in write_ec_cmd\n");
    return -1;
}

/*
 * debugfs
 */
static int debugfs_status_show(struct seq_file *s, void *data)
{
    unsigned long value;

    if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
        seq_printf(s, "Backlight max:\t%lu\n", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
        seq_printf(s, "Backlight now:\t%lu\n", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
        seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
    seq_printf(s, "=====================\n");

    if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
        seq_printf(s, "Radio status:\t%s(%lu)\n",
               value ? "On" : "Off", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
        seq_printf(s, "Wifi status:\t%s(%lu)\n",
               value ? "On" : "Off", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
        seq_printf(s, "BT status:\t%s(%lu)\n",
               value ? "On" : "Off", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
        seq_printf(s, "3G status:\t%s(%lu)\n",
               value ? "On" : "Off", value);
    seq_printf(s, "=====================\n");

    if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
        seq_printf(s, "Touchpad status:%s(%lu)\n",
               value ? "On" : "Off", value);
    if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
        seq_printf(s, "Camera status:\t%s(%lu)\n",
               value ? "On" : "Off", value);

    return 0;
}

static int debugfs_status_open(struct inode *inode, struct file *file)
{
    return single_open(file, debugfs_status_show, NULL);
}

static const struct file_operations debugfs_status_fops = {
    .owner = THIS_MODULE,
    .open = debugfs_status_open,
    .read = seq_read,
    .llseek = seq_lseek,
    .release = single_release,
};

static int debugfs_cfg_show(struct seq_file *s, void *data)
{
    if (!ideapad_priv) {
        seq_printf(s, "cfg: N/A\n");
    } else {
        seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
               ideapad_priv->cfg);
        if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
            seq_printf(s, "Bluetooth ");
        if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
            seq_printf(s, "3G ");
        if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
            seq_printf(s, "Wireless ");
        if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
            seq_printf(s, "Camera ");
        seq_printf(s, "\nGraphic: ");
        switch ((ideapad_priv->cfg)&0x700) {
        case 0x100:
            seq_printf(s, "Intel");
            break;
        case 0x200:
            seq_printf(s, "ATI");
            break;
        case 0x300:
            seq_printf(s, "Nvidia");
            break;
        case 0x400:
            seq_printf(s, "Intel and ATI");
            break;
        case 0x500:
            seq_printf(s, "Intel and Nvidia");
            break;
        }
        seq_printf(s, "\n");
    }
    return 0;
}

static int debugfs_cfg_open(struct inode *inode, struct file *file)
{
    return single_open(file, debugfs_cfg_show, NULL);
}

static const struct file_operations debugfs_cfg_fops = {
    .owner = THIS_MODULE,
    .open = debugfs_cfg_open,
    .read = seq_read,
    .llseek = seq_lseek,
    .release = single_release,
};

static int __devinit ideapad_debugfs_init(struct ideapad_private *priv)
{
    struct dentry *node;

    priv->debug = debugfs_create_dir("ideapad", NULL);
    if (priv->debug == NULL) {
        pr_err("failed to create debugfs directory");
        goto errout;
    }

    node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
                   &debugfs_cfg_fops);
    if (!node) {
        pr_err("failed to create cfg in debugfs");
        goto errout;
    }

    node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
                   &debugfs_status_fops);
    if (!node) {
        pr_err("failed to create status in debugfs");
        goto errout;
    }

    return 0;

errout:
    return -ENOMEM;
}

static void ideapad_debugfs_exit(struct ideapad_private *priv)
{
    debugfs_remove_recursive(priv->debug);
    priv->debug = NULL;
}

/*
 * sysfs
 */
static ssize_t show_ideapad_cam(struct device *dev,
                struct device_attribute *attr,
                char *buf)
{
    unsigned long result;

    if (read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &result))
        return sprintf(buf, "-1\n");
    return sprintf(buf, "%lu\n", result);
}

static ssize_t store_ideapad_cam(struct device *dev,
                 struct device_attribute *attr,
                 const char *buf, size_t count)
{
    int ret, state;

    if (!count)
        return 0;
    if (sscanf(buf, "%i", &state) != 1)
        return -EINVAL;
    ret = write_ec_cmd(ideapad_handle, VPCCMD_W_CAMERA, state);
    if (ret < 0)
        return -EIO;
    return count;
}

static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);

static ssize_t show_ideapad_fan(struct device *dev,
                struct device_attribute *attr,
                char *buf)
{
    unsigned long result;

    if (read_ec_data(ideapad_handle, VPCCMD_R_FAN, &result))
        return sprintf(buf, "-1\n");
    return sprintf(buf, "%lu\n", result);
}

static ssize_t store_ideapad_fan(struct device *dev,
                 struct device_attribute *attr,
                 const char *buf, size_t count)
{
    int ret, state;

    if (!count)
        return 0;
    if (sscanf(buf, "%i", &state) != 1)
        return -EINVAL;
    if (state < 0 || state > 4 || state == 3)
        return -EINVAL;
    ret = write_ec_cmd(ideapad_handle, VPCCMD_W_FAN, state);
    if (ret < 0)
        return -EIO;
    return count;
}

static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);

static struct attribute *ideapad_attributes[] = {
    &dev_attr_camera_power.attr,
    &dev_attr_fan_mode.attr,
    NULL
};

static umode_t ideapad_is_visible(struct kobject *kobj,
                 struct attribute *attr,
                 int idx)
{
    struct device *dev = container_of(kobj, struct device, kobj);
    struct ideapad_private *priv = dev_get_drvdata(dev);
    bool supported;

    if (attr == &dev_attr_camera_power.attr)
        supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
    else if (attr == &dev_attr_fan_mode.attr) {
        unsigned long value;
        supported = !read_ec_data(ideapad_handle, VPCCMD_R_FAN, &value);
    } else
        supported = true;

    return supported ? attr->mode : 0;
}

static struct attribute_group ideapad_attribute_group = {
    .is_visible = ideapad_is_visible,
    .attrs = ideapad_attributes
};

/*
 * Rfkill
 */
struct ideapad_rfk_data {
    char *name;
    int cfgbit;
    int opcode;
    int type;
};

const struct ideapad_rfk_data ideapad_rfk_data[] = {
    { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
    { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
    { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
};

static int ideapad_rfk_set(void *data, bool blocked)
{
    unsigned long opcode = (unsigned long)data;

    return write_ec_cmd(ideapad_handle, opcode, !blocked);
}

static struct rfkill_ops ideapad_rfk_ops = {
    .set_block = ideapad_rfk_set,
};

static void ideapad_sync_rfk_state(struct ideapad_private *priv)
{
    unsigned long hw_blocked;
    int i;

    if (read_ec_data(ideapad_handle, VPCCMD_R_RF, &hw_blocked))
        return;
    hw_blocked = !hw_blocked;

    for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
        if (priv->rfk[i])
            rfkill_set_hw_state(priv->rfk[i], hw_blocked);
}

static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
                         int dev)
{
    struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
    int ret;
    unsigned long sw_blocked;

    if (no_bt_rfkill &&
        (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
        /* Force to enable bluetooth when no_bt_rfkill=1 */
        write_ec_cmd(ideapad_handle,
                 ideapad_rfk_data[dev].opcode, 1);
        return 0;
    }

    priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
                      ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
                      (void *)(long)dev);
    if (!priv->rfk[dev])
        return -ENOMEM;

    if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
             &sw_blocked)) {
        rfkill_init_sw_state(priv->rfk[dev], 0);
    } else {
        sw_blocked = !sw_blocked;
        rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
    }

    ret = rfkill_register(priv->rfk[dev]);
    if (ret) {
        rfkill_destroy(priv->rfk[dev]);
        return ret;
    }
    return 0;
}

static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
{
    struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);

    if (!priv->rfk[dev])
        return;

    rfkill_unregister(priv->rfk[dev]);
    rfkill_destroy(priv->rfk[dev]);
}

/*
 * Platform device
 */
static int __devinit ideapad_platform_init(struct ideapad_private *priv)
{
    int result;

    priv->platform_device = platform_device_alloc("ideapad", -1);
    if (!priv->platform_device)
        return -ENOMEM;
    platform_set_drvdata(priv->platform_device, priv);

    result = platform_device_add(priv->platform_device);
    if (result)
        goto fail_platform_device;

    result = sysfs_create_group(&priv->platform_device->dev.kobj,
                    &ideapad_attribute_group);
    if (result)
        goto fail_sysfs;
    return 0;

fail_sysfs:
    platform_device_del(priv->platform_device);
fail_platform_device:
    platform_device_put(priv->platform_device);
    return result;
}

static void ideapad_platform_exit(struct ideapad_private *priv)
{
    sysfs_remove_group(&priv->platform_device->dev.kobj,
               &ideapad_attribute_group);
    platform_device_unregister(priv->platform_device);
}

/*
 * input device
 */
static const struct key_entry ideapad_keymap[] = {
    { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
    { KE_KEY, 7,  { KEY_CAMERA } },
    { KE_KEY, 11, { KEY_F16 } },
    { KE_KEY, 13, { KEY_WLAN } },
    { KE_KEY, 16, { KEY_PROG1 } },
    { KE_KEY, 17, { KEY_PROG2 } },
    { KE_KEY, 64, { KEY_PROG3 } },
    { KE_KEY, 65, { KEY_PROG4 } },
    { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
    { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
    { KE_END, 0 },
};

static int __devinit ideapad_input_init(struct ideapad_private *priv)
{
    struct input_dev *inputdev;
    int error;

    inputdev = input_allocate_device();
    if (!inputdev) {
        pr_info("Unable to allocate input device\n");
        return -ENOMEM;
    }

    inputdev->name = "Ideapad extra buttons";
    inputdev->phys = "ideapad/input0";
    inputdev->id.bustype = BUS_HOST;
    inputdev->dev.parent = &priv->platform_device->dev;

    error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
    if (error) {
        pr_err("Unable to setup input device keymap\n");
        goto err_free_dev;
    }

    error = input_register_device(inputdev);
    if (error) {
        pr_err("Unable to register input device\n");
        goto err_free_keymap;
    }

    priv->inputdev = inputdev;
    return 0;

err_free_keymap:
    sparse_keymap_free(inputdev);
err_free_dev:
    input_free_device(inputdev);
    return error;
}

static void ideapad_input_exit(struct ideapad_private *priv)
{
    sparse_keymap_free(priv->inputdev);
    input_unregister_device(priv->inputdev);
    priv->inputdev = NULL;
}

static void ideapad_input_report(struct ideapad_private *priv,
                 unsigned long scancode)
{
    sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
}

static void ideapad_input_novokey(struct ideapad_private *priv)
{
    unsigned long long_pressed;

    if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
        return;
    if (long_pressed)
        ideapad_input_report(priv, 17);
    else
        ideapad_input_report(priv, 16);
}

static void ideapad_check_special_buttons(struct ideapad_private *priv)
{
    unsigned long bit, value;

    read_ec_data(ideapad_handle, VPCCMD_R_SPECIAL_BUTTONS, &value);

    for (bit = 0; bit < 16; bit++) {
        if (test_bit(bit, &value)) {
            switch (bit) {
            case 6:
                /* Thermal Management button */
                ideapad_input_report(priv, 65);
                break;
            case 1:
                /* OneKey Theater button */
                ideapad_input_report(priv, 64);
                break;
            }
        }
    }
}

/*
 * backlight
 */
static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
{
    unsigned long now;

    if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
        return -EIO;
    return now;
}

static int ideapad_backlight_update_status(struct backlight_device *blightdev)
{
    if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
             blightdev->props.brightness))
        return -EIO;
    if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
             blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
        return -EIO;

    return 0;
}

static const struct backlight_ops ideapad_backlight_ops = {
    .get_brightness = ideapad_backlight_get_brightness,
    .update_status = ideapad_backlight_update_status,
};

static int ideapad_backlight_init(struct ideapad_private *priv)
{
    struct backlight_device *blightdev;
    struct backlight_properties props;
    unsigned long max, now, power;

    if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
        return -EIO;
    if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
        return -EIO;
    if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
        return -EIO;

    memset(&props, 0, sizeof(struct backlight_properties));
    props.max_brightness = max;
    props.type = BACKLIGHT_PLATFORM;
    blightdev = backlight_device_register("ideapad",
                          &priv->platform_device->dev,
                          priv,
                          &ideapad_backlight_ops,
                          &props);
    if (IS_ERR(blightdev)) {
        pr_err("Could not register backlight device\n");
        return PTR_ERR(blightdev);
    }

    priv->blightdev = blightdev;
    blightdev->props.brightness = now;
    blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
    backlight_update_status(blightdev);

    return 0;
}

static void ideapad_backlight_exit(struct ideapad_private *priv)
{
    if (priv->blightdev)
        backlight_device_unregister(priv->blightdev);
    priv->blightdev = NULL;
}

static void ideapad_backlight_notify_power(struct ideapad_private *priv)
{
    unsigned long power;
    struct backlight_device *blightdev = priv->blightdev;

    if (!blightdev)
        return;
    if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
        return;
    blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
}

static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
{
    unsigned long now;

    /* if we control brightness via acpi video driver */
    if (priv->blightdev == NULL) {
        read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
        return;
    }

    backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
}

/*
 * module init/exit
 */
static const struct acpi_device_id ideapad_device_ids[] = {
    { "VPC2004", 0},
    { "", 0},
};
MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);

static void ideapad_sync_touchpad_state(struct acpi_device *adevice)
{
    struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
    unsigned long value;

    /* Without reading from EC touchpad LED doesn't switch state */
    if (!read_ec_data(adevice->handle, VPCCMD_R_TOUCHPAD, &value)) {
        /* Some IdeaPads don't really turn off touchpad - they only
         * switch the LED state. We (de)activate KBC AUX port to turn
         * touchpad off and on. We send KEY_TOUCHPAD_OFF and
         * KEY_TOUCHPAD_ON to not to get out of sync with LED */
        unsigned char param;
        i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
                  I8042_CMD_AUX_DISABLE);
        ideapad_input_report(priv, value ? 67 : 66);
    }
}

static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
{
    int ret, i;
    int cfg;
    struct ideapad_private *priv;

    if (read_method_int(adevice->handle, "_CFG", &cfg))
        return -ENODEV;

    priv = kzalloc(sizeof(*priv), GFP_KERNEL);
    if (!priv)
        return -ENOMEM;
    dev_set_drvdata(&adevice->dev, priv);
    ideapad_priv = priv;
    ideapad_handle = adevice->handle;
    priv->cfg = cfg;

    ret = ideapad_platform_init(priv);
    if (ret)
        goto platform_failed;

    ret = ideapad_debugfs_init(priv);
    if (ret)
        goto debugfs_failed;

    ret = ideapad_input_init(priv);
    if (ret)
        goto input_failed;

    for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
        if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
            ideapad_register_rfkill(adevice, i);
        else
            priv->rfk[i] = NULL;
    }
    ideapad_sync_rfk_state(priv);
    ideapad_sync_touchpad_state(adevice);

    if (!acpi_video_backlight_support()) {
        ret = ideapad_backlight_init(priv);
        if (ret && ret != -ENODEV)
            goto backlight_failed;
    }

    return 0;

backlight_failed:
    for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
        ideapad_unregister_rfkill(adevice, i);
    ideapad_input_exit(priv);
input_failed:
    ideapad_debugfs_exit(priv);
debugfs_failed:
    ideapad_platform_exit(priv);
platform_failed:
    kfree(priv);
    return ret;
}

static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
{
    struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
    int i;

    ideapad_backlight_exit(priv);
    for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
        ideapad_unregister_rfkill(adevice, i);
    ideapad_input_exit(priv);
    ideapad_debugfs_exit(priv);
    ideapad_platform_exit(priv);
    dev_set_drvdata(&adevice->dev, NULL);
    kfree(priv);

    return 0;
}

static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
{
    struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
    acpi_handle handle = adevice->handle;
    unsigned long vpc1, vpc2, vpc_bit;

    if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
        return;
    if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
        return;

    vpc1 = (vpc2 << 8) | vpc1;
    for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
        if (test_bit(vpc_bit, &vpc1)) {
            switch (vpc_bit) {
            case 9:
                ideapad_sync_rfk_state(priv);
                break;
            case 13:
            case 11:
            case 7:
            case 6:
                ideapad_input_report(priv, vpc_bit);
                break;
            case 5:
                ideapad_sync_touchpad_state(adevice);
                break;
            case 4:
                ideapad_backlight_notify_brightness(priv);
                break;
            case 3:
                ideapad_input_novokey(priv);
                break;
            case 2:
                ideapad_backlight_notify_power(priv);
                break;
            case 0:
                ideapad_check_special_buttons(priv);
                break;
            default:
                pr_info("Unknown event: %lu\n", vpc_bit);
            }
        }
    }
}

static int ideapad_acpi_resume(struct device *device)
{
    ideapad_sync_rfk_state(ideapad_priv);
    ideapad_sync_touchpad_state(to_acpi_device(device));
    return 0;
}

static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);

static struct acpi_driver ideapad_acpi_driver = {
    .name = "ideapad_acpi",
    .class = "IdeaPad",
    .ids = ideapad_device_ids,
    .ops.add = ideapad_acpi_add,
    .ops.remove = ideapad_acpi_remove,
    .ops.notify = ideapad_acpi_notify,
    .drv.pm = &ideapad_pm,
    .owner = THIS_MODULE,
};
module_acpi_driver(ideapad_acpi_driver);

MODULE_AUTHOR("David Woodhouse <[email protected]>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
MODULE_LICENSE("GPL");