- 根目录:
- drivers
- platform
- x86
- ideapad-laptop.c
/*
* ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
*
* Copyright © 2010 Intel Corporation
* Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
*
* 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>
#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_R_RF = 0x23,
VPCCMD_W_RF,
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", ¶ms, &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", ¶ms, 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
*/
#define DEBUGFS_EVENT_LEN (4096)
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 event 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 ret;
return count;
}
static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
static struct attribute *ideapad_attributes[] = {
&dev_attr_camera_power.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
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, 13, { KEY_WLAN } },
{ KE_KEY, 16, { KEY_PROG1 } },
{ KE_KEY, 17, { KEY_PROG2 } },
{ 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);
}
/*
* 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 int __devinit ideapad_acpi_add(struct acpi_device *adevice)
{
int ret, i;
unsigned long cfg;
struct ideapad_private *priv;
if (read_method_int(adevice->handle, "_CFG", (int *)&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, &cfg))
ideapad_register_rfkill(adevice, i);
else
priv->rfk[i] = NULL;
}
ideapad_sync_rfk_state(priv);
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 4:
ideapad_backlight_notify_brightness(priv);
break;
case 3:
ideapad_input_novokey(priv);
break;
case 2:
ideapad_backlight_notify_power(priv);
break;
default:
ideapad_input_report(priv, vpc_bit);
}
}
}
}
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,
.owner = THIS_MODULE,
};
static int __init ideapad_acpi_module_init(void)
{
return acpi_bus_register_driver(&ideapad_acpi_driver);
}
static void __exit ideapad_acpi_module_exit(void)
{
acpi_bus_unregister_driver(&ideapad_acpi_driver);
}
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
MODULE_LICENSE("GPL");
module_init(ideapad_acpi_module_init);
module_exit(ideapad_acpi_module_exit);