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OpenCloudOS-Kernel/drivers/platform/x86/ideapad-laptop.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
*
* Copyright © 2010 Intel Corporation
* Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/acpi.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>
#include <linux/dmi.h>
#include <linux/device.h>
#include <acpi/video.h>
#define IDEAPAD_RFKILL_DEV_NUM (3)
#define BM_CONSERVATION_BIT (5)
#define HA_FNLOCK_BIT (10)
#define CFG_BT_BIT (16)
#define CFG_3G_BIT (17)
#define CFG_WIFI_BIT (18)
#define CFG_CAMERA_BIT (19)
#if IS_ENABLED(CONFIG_ACPI_WMI)
static const char *const ideapad_wmi_fnesc_events[] = {
"26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
"56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
};
#endif
enum {
BMCMD_CONSERVATION_ON = 3,
BMCMD_CONSERVATION_OFF = 5,
HACMD_FNLOCK_ON = 0xe,
HACMD_FNLOCK_OFF = 0xf,
};
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_rfk_priv {
int dev;
struct ideapad_private *priv;
};
struct ideapad_private {
struct acpi_device *adev;
struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
struct platform_device *platform_device;
struct input_dev *inputdev;
struct backlight_device *blightdev;
struct dentry *debug;
unsigned long cfg;
bool has_hw_rfkill_switch;
const char *fnesc_guid;
};
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 (200) /* 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;
}
*val = result;
return 0;
}
static int method_gbmd(acpi_handle handle, unsigned long *ret)
{
int result, val;
result = read_method_int(handle, "GBMD", &val);
*ret = val;
return result;
}
static int method_int1(acpi_handle handle, char *method, int cmd)
{
acpi_status status;
status = acpi_execute_simple_method(handle, method, cmd);
return ACPI_FAILURE(status) ? -1 : 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;
}
*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 %s\n", __func__);
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 %s\n", __func__);
return -1;
}
/*
* debugfs
*/
static int debugfs_status_show(struct seq_file *s, void *data)
{
struct ideapad_private *priv = s->private;
unsigned long value;
if (!priv)
return -EINVAL;
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
seq_printf(s, "Backlight max:\t%lu\n", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
seq_printf(s, "Backlight now:\t%lu\n", value);
if (!read_ec_data(priv->adev->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(priv->adev->handle, VPCCMD_R_RF, &value))
seq_printf(s, "Radio status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
seq_printf(s, "Wifi status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
seq_printf(s, "BT status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(priv->adev->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(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
seq_printf(s, "Touchpad status:%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
seq_printf(s, "Camera status:\t%s(%lu)\n",
value ? "On" : "Off", value);
seq_puts(s, "=====================\n");
if (!method_gbmd(priv->adev->handle, &value)) {
seq_printf(s, "Conservation mode:\t%s(%lu)\n",
test_bit(BM_CONSERVATION_BIT, &value) ? "On" : "Off",
value);
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(debugfs_status);
static int debugfs_cfg_show(struct seq_file *s, void *data)
{
struct ideapad_private *priv = s->private;
if (!priv) {
seq_printf(s, "cfg: N/A\n");
} else {
seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
priv->cfg);
if (test_bit(CFG_BT_BIT, &priv->cfg))
seq_printf(s, "Bluetooth ");
if (test_bit(CFG_3G_BIT, &priv->cfg))
seq_printf(s, "3G ");
if (test_bit(CFG_WIFI_BIT, &priv->cfg))
seq_printf(s, "Wireless ");
if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
seq_printf(s, "Camera ");
seq_printf(s, "\nGraphic: ");
switch ((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;
}
DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
static void ideapad_debugfs_init(struct ideapad_private *priv)
{
struct dentry *dir;
dir = debugfs_create_dir("ideapad", NULL);
priv->debug = dir;
debugfs_create_file("cfg", S_IRUGO, dir, priv, &debugfs_cfg_fops);
debugfs_create_file("status", S_IRUGO, dir, priv, &debugfs_status_fops);
}
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;
struct ideapad_private *priv = dev_get_drvdata(dev);
if (read_ec_data(priv->adev->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;
struct ideapad_private *priv = dev_get_drvdata(dev);
if (!count)
return 0;
if (sscanf(buf, "%i", &state) != 1)
return -EINVAL;
ret = write_ec_cmd(priv->adev->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;
struct ideapad_private *priv = dev_get_drvdata(dev);
if (read_ec_data(priv->adev->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;
struct ideapad_private *priv = dev_get_drvdata(dev);
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(priv->adev->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 ssize_t touchpad_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long result;
if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
return sprintf(buf, "-1\n");
return sprintf(buf, "%lu\n", result);
}
/* Switch to RO for now: It might be revisited in the future */
static ssize_t __maybe_unused touchpad_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
bool state;
int ret;
ret = kstrtobool(buf, &state);
if (ret)
return ret;
ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
if (ret < 0)
return -EIO;
return count;
}
static DEVICE_ATTR_RO(touchpad);
static ssize_t conservation_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long result;
if (method_gbmd(priv->adev->handle, &result))
return sprintf(buf, "-1\n");
return sprintf(buf, "%u\n", test_bit(BM_CONSERVATION_BIT, &result));
}
static ssize_t conservation_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
bool state;
int ret;
ret = kstrtobool(buf, &state);
if (ret)
return ret;
ret = method_int1(priv->adev->handle, "SBMC", state ?
BMCMD_CONSERVATION_ON :
BMCMD_CONSERVATION_OFF);
if (ret < 0)
return -EIO;
return count;
}
static DEVICE_ATTR_RW(conservation_mode);
static ssize_t fn_lock_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long result;
int hals;
int fail = read_method_int(priv->adev->handle, "HALS", &hals);
if (fail)
return sprintf(buf, "-1\n");
result = hals;
return sprintf(buf, "%u\n", test_bit(HA_FNLOCK_BIT, &result));
}
static ssize_t fn_lock_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
bool state;
int ret;
ret = kstrtobool(buf, &state);
if (ret)
return ret;
ret = method_int1(priv->adev->handle, "SALS", state ?
HACMD_FNLOCK_ON :
HACMD_FNLOCK_OFF);
if (ret < 0)
return -EIO;
return count;
}
static DEVICE_ATTR_RW(fn_lock);
static struct attribute *ideapad_attributes[] = {
&dev_attr_camera_power.attr,
&dev_attr_fan_mode.attr,
&dev_attr_touchpad.attr,
&dev_attr_conservation_mode.attr,
&dev_attr_fn_lock.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(priv->adev->handle, VPCCMD_R_FAN,
&value);
} else if (attr == &dev_attr_conservation_mode.attr) {
supported = acpi_has_method(priv->adev->handle, "GBMD") &&
acpi_has_method(priv->adev->handle, "SBMC");
} else if (attr == &dev_attr_fn_lock.attr) {
supported = acpi_has_method(priv->adev->handle, "HALS") &&
acpi_has_method(priv->adev->handle, "SALS");
} else
supported = true;
return supported ? attr->mode : 0;
}
static const 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;
};
static 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)
{
struct ideapad_rfk_priv *priv = data;
int opcode = ideapad_rfk_data[priv->dev].opcode;
return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
}
static const 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 = 0;
int i;
if (priv->has_hw_rfkill_switch) {
if (read_ec_data(priv->adev->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 ideapad_register_rfkill(struct ideapad_private *priv, int 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(priv->adev->handle,
ideapad_rfk_data[dev].opcode, 1);
return 0;
}
priv->rfk_priv[dev].dev = dev;
priv->rfk_priv[dev].priv = priv;
priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
&priv->platform_device->dev,
ideapad_rfk_data[dev].type,
&ideapad_rfk_ops,
&priv->rfk_priv[dev]);
if (!priv->rfk[dev])
return -ENOMEM;
if (read_ec_data(priv->adev->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 ideapad_private *priv, int dev)
{
if (!priv->rfk[dev])
return;
rfkill_unregister(priv->rfk[dev]);
rfkill_destroy(priv->rfk[dev]);
}
/*
* Platform device
*/
static int ideapad_sysfs_init(struct ideapad_private *priv)
{
return sysfs_create_group(&priv->platform_device->dev.kobj,
&ideapad_attribute_group);
}
static void ideapad_sysfs_exit(struct ideapad_private *priv)
{
sysfs_remove_group(&priv->platform_device->dev.kobj,
&ideapad_attribute_group);
}
/*
* input device
*/
static const struct key_entry ideapad_keymap[] = {
{ KE_KEY, 6, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 7, { KEY_CAMERA } },
{ KE_KEY, 8, { KEY_MICMUTE } },
{ 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_KEY, 128, { KEY_ESC } },
{ KE_END, 0 },
};
static int ideapad_input_init(struct ideapad_private *priv)
{
struct input_dev *inputdev;
int error;
inputdev = input_allocate_device();
if (!inputdev)
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_dev;
}
priv->inputdev = inputdev;
return 0;
err_free_dev:
input_free_device(inputdev);
return error;
}
static void ideapad_input_exit(struct ideapad_private *priv)
{
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(priv->adev->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(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
for (bit = 0; bit < 16; bit++) {
if (test_bit(bit, &value)) {
switch (bit) {
case 0: /* Z580 */
case 6: /* Z570 */
/* Thermal Management button */
ideapad_input_report(priv, 65);
break;
case 1:
/* OneKey Theater button */
ideapad_input_report(priv, 64);
break;
default:
pr_info("Unknown special button: %lu\n", bit);
break;
}
}
}
}
/*
* backlight
*/
static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
{
struct ideapad_private *priv = bl_get_data(blightdev);
unsigned long now;
if (!priv)
return -EINVAL;
if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
return -EIO;
return now;
}
static int ideapad_backlight_update_status(struct backlight_device *blightdev)
{
struct ideapad_private *priv = bl_get_data(blightdev);
if (!priv)
return -EINVAL;
if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
blightdev->props.brightness))
return -EIO;
if (write_ec_cmd(priv->adev->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(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
return -EIO;
if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
return -EIO;
if (read_ec_data(priv->adev->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)
{
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(priv->adev->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(priv->adev->handle, VPCCMD_R_BL, &now);
return;
}
backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
}
/*
* module init/exit
*/
static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
{
unsigned long value;
/* Without reading from EC touchpad LED doesn't switch state */
if (!read_ec_data(priv->adev->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 void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
{
struct ideapad_private *priv = data;
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 8:
case 7:
case 6:
ideapad_input_report(priv, vpc_bit);
break;
case 5:
ideapad_sync_touchpad_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;
case 0:
ideapad_check_special_buttons(priv);
break;
case 1:
/* Some IdeaPads report event 1 every ~20
* seconds while on battery power; some
* report this when changing to/from tablet
* mode. Squelch this event.
*/
break;
default:
pr_info("Unknown event: %lu\n", vpc_bit);
}
}
}
}
#if IS_ENABLED(CONFIG_ACPI_WMI)
static void ideapad_wmi_notify(u32 value, void *context)
{
switch (value) {
case 128:
ideapad_input_report(context, value);
break;
default:
pr_info("Unknown WMI event %u\n", value);
}
}
#endif
/*
* Some ideapads have a hardware rfkill switch, but most do not have one.
* Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
* switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
* There used to be a long list of DMI ids for models without a hw rfkill
* switch here, but that resulted in playing whack a mole.
* More importantly wrongly reporting the wifi radio as hw-blocked, results in
* non working wifi. Whereas not reporting it hw-blocked, when it actually is
* hw-blocked results in an empty SSID list, which is a much more benign
* failure mode.
* So the default now is the much safer option of assuming there is no
* hardware rfkill switch. This default also actually matches most hardware,
* since having a hw rfkill switch is quite rare on modern hardware, so this
* also leads to a much shorter list.
*/
static const struct dmi_system_id hw_rfkill_list[] = {
{}
};
static int ideapad_acpi_add(struct platform_device *pdev)
{
int ret, i;
int cfg;
struct ideapad_private *priv;
struct acpi_device *adev;
ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
if (ret)
return -ENODEV;
if (read_method_int(adev->handle, "_CFG", &cfg))
return -ENODEV;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dev_set_drvdata(&pdev->dev, priv);
priv->cfg = cfg;
priv->adev = adev;
priv->platform_device = pdev;
priv->has_hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
ret = ideapad_sysfs_init(priv);
if (ret)
return ret;
ideapad_debugfs_init(priv);
ret = ideapad_input_init(priv);
if (ret)
goto input_failed;
/*
* On some models without a hw-switch (the yoga 2 13 at least)
* VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
*/
if (!priv->has_hw_rfkill_switch)
write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
ideapad_register_rfkill(priv, i);
ideapad_sync_rfk_state(priv);
ideapad_sync_touchpad_state(priv);
if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
ret = ideapad_backlight_init(priv);
if (ret && ret != -ENODEV)
goto backlight_failed;
}
ret = acpi_install_notify_handler(adev->handle,
ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
if (ret)
goto notification_failed;
#if IS_ENABLED(CONFIG_ACPI_WMI)
for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
ideapad_wmi_notify, priv);
if (ret == AE_OK) {
priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
break;
}
}
if (ret != AE_OK && ret != AE_NOT_EXIST)
goto notification_failed_wmi;
#endif
return 0;
#if IS_ENABLED(CONFIG_ACPI_WMI)
notification_failed_wmi:
acpi_remove_notify_handler(priv->adev->handle,
ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
#endif
notification_failed:
ideapad_backlight_exit(priv);
backlight_failed:
for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
ideapad_unregister_rfkill(priv, i);
ideapad_input_exit(priv);
input_failed:
ideapad_debugfs_exit(priv);
ideapad_sysfs_exit(priv);
return ret;
}
static int ideapad_acpi_remove(struct platform_device *pdev)
{
struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
int i;
#if IS_ENABLED(CONFIG_ACPI_WMI)
if (priv->fnesc_guid)
wmi_remove_notify_handler(priv->fnesc_guid);
#endif
acpi_remove_notify_handler(priv->adev->handle,
ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
ideapad_backlight_exit(priv);
for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
ideapad_unregister_rfkill(priv, i);
ideapad_input_exit(priv);
ideapad_debugfs_exit(priv);
ideapad_sysfs_exit(priv);
dev_set_drvdata(&pdev->dev, NULL);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int ideapad_acpi_resume(struct device *device)
{
struct ideapad_private *priv;
if (!device)
return -EINVAL;
priv = dev_get_drvdata(device);
ideapad_sync_rfk_state(priv);
ideapad_sync_touchpad_state(priv);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
static const struct acpi_device_id ideapad_device_ids[] = {
{ "VPC2004", 0},
{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
static struct platform_driver ideapad_acpi_driver = {
.probe = ideapad_acpi_add,
.remove = ideapad_acpi_remove,
.driver = {
.name = "ideapad_acpi",
.pm = &ideapad_pm,
.acpi_match_table = ACPI_PTR(ideapad_device_ids),
},
};
module_platform_driver(ideapad_acpi_driver);
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
MODULE_LICENSE("GPL");
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