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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 <[email protected]>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/acpi.h>
#include <linux/backlight.h>
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/fb.h>
#include <linux/i8042.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_profile.h>
#include <linux/rfkill.h>
#include <linux/seq_file.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/wmi.h>
#include <acpi/video.h>
#include <dt-bindings/leds/common.h>
#define IDEAPAD_RFKILL_DEV_NUM 3
enum {
CFG_CAP_BT_BIT = 16,
CFG_CAP_3G_BIT = 17,
CFG_CAP_WIFI_BIT = 18,
CFG_CAP_CAM_BIT = 19,
/*
* These are OnScreenDisplay support bits that can be useful to determine
* whether a hotkey exists/should show OSD. But they aren't particularly
* meaningful since they were introduced later, i.e. 2010 IdeaPads
* don't have these, but they still have had OSD for hotkeys.
*/
CFG_OSD_NUMLK_BIT = 27,
CFG_OSD_CAPSLK_BIT = 28,
CFG_OSD_MICMUTE_BIT = 29,
CFG_OSD_TOUCHPAD_BIT = 30,
CFG_OSD_CAM_BIT = 31,
};
enum {
GBMD_CONSERVATION_STATE_BIT = 5,
};
enum {
SBMC_CONSERVATION_ON = 3,
SBMC_CONSERVATION_OFF = 5,
};
enum {
HALS_KBD_BL_SUPPORT_BIT = 4,
HALS_KBD_BL_STATE_BIT = 5,
HALS_USB_CHARGING_SUPPORT_BIT = 6,
HALS_USB_CHARGING_STATE_BIT = 7,
HALS_FNLOCK_SUPPORT_BIT = 9,
HALS_FNLOCK_STATE_BIT = 10,
HALS_HOTKEYS_PRIMARY_BIT = 11,
};
enum {
SALS_KBD_BL_ON = 0x8,
SALS_KBD_BL_OFF = 0x9,
SALS_USB_CHARGING_ON = 0xa,
SALS_USB_CHARGING_OFF = 0xb,
SALS_FNLOCK_ON = 0xe,
SALS_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_dytc_priv {
enum platform_profile_option current_profile;
struct platform_profile_handler pprof;
struct mutex mutex; /* protects the DYTC interface */
struct ideapad_private *priv;
};
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 ideapad_dytc_priv *dytc;
struct dentry *debug;
unsigned long cfg;
unsigned long r_touchpad_val;
struct {
bool conservation_mode : 1;
bool dytc : 1;
bool fan_mode : 1;
bool fn_lock : 1;
bool set_fn_lock_led : 1;
bool hw_rfkill_switch : 1;
bool kbd_bl : 1;
bool touchpad_ctrl_via_ec : 1;
bool ctrl_ps2_aux_port : 1;
bool usb_charging : 1;
} features;
struct {
bool initialized;
struct led_classdev led;
unsigned int last_brightness;
} kbd_bl;
};
static bool no_bt_rfkill;
module_param(no_bt_rfkill, bool, 0444);
MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
static bool allow_v4_dytc;
module_param(allow_v4_dytc, bool, 0444);
MODULE_PARM_DESC(allow_v4_dytc,
"Enable DYTC version 4 platform-profile support. "
"If you need this please report this to: [email protected]");
static bool hw_rfkill_switch;
module_param(hw_rfkill_switch, bool, 0444);
MODULE_PARM_DESC(hw_rfkill_switch,
"Enable rfkill support for laptops with a hw on/off wifi switch/slider. "
"If you need this please report this to: [email protected]");
static bool set_fn_lock_led;
module_param(set_fn_lock_led, bool, 0444);
MODULE_PARM_DESC(set_fn_lock_led,
"Enable driver based updates of the fn-lock LED on fn-lock changes. "
"If you need this please report this to: [email protected]");
static bool ctrl_ps2_aux_port;
module_param(ctrl_ps2_aux_port, bool, 0444);
MODULE_PARM_DESC(ctrl_ps2_aux_port,
"Enable driver based PS/2 aux port en-/dis-abling on touchpad on/off toggle. "
"If you need this please report this to: [email protected]");
static bool touchpad_ctrl_via_ec;
module_param(touchpad_ctrl_via_ec, bool, 0444);
MODULE_PARM_DESC(touchpad_ctrl_via_ec,
"Enable registering a 'touchpad' sysfs-attribute which can be used to manually "
"tell the EC to enable/disable the touchpad. This may not work on all models.");
/*
* shared data
*/
static struct ideapad_private *ideapad_shared;
static DEFINE_MUTEX(ideapad_shared_mutex);
static int ideapad_shared_init(struct ideapad_private *priv)
{
int ret;
mutex_lock(&ideapad_shared_mutex);
if (!ideapad_shared) {
ideapad_shared = priv;
ret = 0;
} else {
dev_warn(&priv->adev->dev, "found multiple platform devices\n");
ret = -EINVAL;
}
mutex_unlock(&ideapad_shared_mutex);
return ret;
}
static void ideapad_shared_exit(struct ideapad_private *priv)
{
mutex_lock(&ideapad_shared_mutex);
if (ideapad_shared == priv)
ideapad_shared = NULL;
mutex_unlock(&ideapad_shared_mutex);
}
/*
* ACPI Helpers
*/
#define IDEAPAD_EC_TIMEOUT 200 /* in ms */
static int eval_int(acpi_handle handle, const char *name, unsigned long *res)
{
unsigned long long result;
acpi_status status;
status = acpi_evaluate_integer(handle, (char *)name, NULL, &result);
if (ACPI_FAILURE(status))
return -EIO;
*res = result;
return 0;
}
static int exec_simple_method(acpi_handle handle, const char *name, unsigned long arg)
{
acpi_status status = acpi_execute_simple_method(handle, (char *)name, arg);
return ACPI_FAILURE(status) ? -EIO : 0;
}
static int eval_gbmd(acpi_handle handle, unsigned long *res)
{
return eval_int(handle, "GBMD", res);
}
static int exec_sbmc(acpi_handle handle, unsigned long arg)
{
return exec_simple_method(handle, "SBMC", arg);
}
static int eval_hals(acpi_handle handle, unsigned long *res)
{
return eval_int(handle, "HALS", res);
}
static int exec_sals(acpi_handle handle, unsigned long arg)
{
return exec_simple_method(handle, "SALS", arg);
}
static int eval_int_with_arg(acpi_handle handle, const char *name, unsigned long arg, unsigned long *res)
{
struct acpi_object_list params;
unsigned long long result;
union acpi_object in_obj;
acpi_status status;
params.count = 1;
params.pointer = &in_obj;
in_obj.type = ACPI_TYPE_INTEGER;
in_obj.integer.value = arg;
status = acpi_evaluate_integer(handle, (char *)name, ¶ms, &result);
if (ACPI_FAILURE(status))
return -EIO;
if (res)
*res = result;
return 0;
}
static int eval_dytc(acpi_handle handle, unsigned long cmd, unsigned long *res)
{
return eval_int_with_arg(handle, "DYTC", cmd, res);
}
static int eval_vpcr(acpi_handle handle, unsigned long cmd, unsigned long *res)
{
return eval_int_with_arg(handle, "VPCR", cmd, res);
}
static int eval_vpcw(acpi_handle handle, unsigned long cmd, unsigned long 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 (ACPI_FAILURE(status))
return -EIO;
return 0;
}
static int read_ec_data(acpi_handle handle, unsigned long cmd, unsigned long *data)
{
unsigned long end_jiffies, val;
int err;
err = eval_vpcw(handle, 1, cmd);
if (err)
return err;
end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
while (time_before(jiffies, end_jiffies)) {
schedule();
err = eval_vpcr(handle, 1, &val);
if (err)
return err;
if (val == 0)
return eval_vpcr(handle, 0, data);
}
acpi_handle_err(handle, "timeout in %s\n", __func__);
return -ETIMEDOUT;
}
static int write_ec_cmd(acpi_handle handle, unsigned long cmd, unsigned long data)
{
unsigned long end_jiffies, val;
int err;
err = eval_vpcw(handle, 0, data);
if (err)
return err;
err = eval_vpcw(handle, 1, cmd);
if (err)
return err;
end_jiffies = jiffies + msecs_to_jiffies(IDEAPAD_EC_TIMEOUT) + 1;
while (time_before(jiffies, end_jiffies)) {
schedule();
err = eval_vpcr(handle, 1, &val);
if (err)
return err;
if (val == 0)
return 0;
}
acpi_handle_err(handle, "timeout in %s\n", __func__);
return -ETIMEDOUT;
}
/*
* debugfs
*/
static int debugfs_status_show(struct seq_file *s, void *data)
{
struct ideapad_private *priv = s->private;
unsigned long value;
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
seq_printf(s, "Backlight max: %lu\n", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
seq_printf(s, "Backlight now: %lu\n", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
seq_printf(s, "BL power value: %s (%lu)\n", value ? "on" : "off", value);
seq_puts(s, "=====================\n");
if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
seq_printf(s, "Radio status: %s (%lu)\n", value ? "on" : "off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
seq_printf(s, "Wifi status: %s (%lu)\n", value ? "on" : "off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
seq_printf(s, "BT status: %s (%lu)\n", value ? "on" : "off", value);
if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
seq_printf(s, "3G status: %s (%lu)\n", value ? "on" : "off", value);
seq_puts(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: %s (%lu)\n", value ? "on" : "off", value);
seq_puts(s, "=====================\n");
if (!eval_gbmd(priv->adev->handle, &value))
seq_printf(s, "GBMD: %#010lx\n", value);
if (!eval_hals(priv->adev->handle, &value))
seq_printf(s, "HALS: %#010lx\n", 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;
seq_printf(s, "_CFG: %#010lx\n\n", priv->cfg);
seq_puts(s, "Capabilities:");
if (test_bit(CFG_CAP_BT_BIT, &priv->cfg))
seq_puts(s, " bluetooth");
if (test_bit(CFG_CAP_3G_BIT, &priv->cfg))
seq_puts(s, " 3G");
if (test_bit(CFG_CAP_WIFI_BIT, &priv->cfg))
seq_puts(s, " wifi");
if (test_bit(CFG_CAP_CAM_BIT, &priv->cfg))
seq_puts(s, " camera");
seq_puts(s, "\n");
seq_puts(s, "OSD support:");
if (test_bit(CFG_OSD_NUMLK_BIT, &priv->cfg))
seq_puts(s, " num-lock");
if (test_bit(CFG_OSD_CAPSLK_BIT, &priv->cfg))
seq_puts(s, " caps-lock");
if (test_bit(CFG_OSD_MICMUTE_BIT, &priv->cfg))
seq_puts(s, " mic-mute");
if (test_bit(CFG_OSD_TOUCHPAD_BIT, &priv->cfg))
seq_puts(s, " touchpad");
if (test_bit(CFG_OSD_CAM_BIT, &priv->cfg))
seq_puts(s, " camera");
seq_puts(s, "\n");
seq_puts(s, "Graphics: ");
switch (priv->cfg & 0x700) {
case 0x100:
seq_puts(s, "Intel");
break;
case 0x200:
seq_puts(s, "ATI");
break;
case 0x300:
seq_puts(s, "Nvidia");
break;
case 0x400:
seq_puts(s, "Intel and ATI");
break;
case 0x500:
seq_puts(s, "Intel and Nvidia");
break;
}
seq_puts(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", 0444, dir, priv, &debugfs_cfg_fops);
debugfs_create_file("status", 0444, 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 camera_power_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long result;
int err;
err = read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result);
if (err)
return err;
return sysfs_emit(buf, "%d\n", !!result);
}
static ssize_t camera_power_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 err;
err = kstrtobool(buf, &state);
if (err)
return err;
err = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
if (err)
return err;
return count;
}
static DEVICE_ATTR_RW(camera_power);
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;
int err;
err = eval_gbmd(priv->adev->handle, &result);
if (err)
return err;
return sysfs_emit(buf, "%d\n", !!test_bit(GBMD_CONSERVATION_STATE_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 err;
err = kstrtobool(buf, &state);
if (err)
return err;
err = exec_sbmc(priv->adev->handle, state ? SBMC_CONSERVATION_ON : SBMC_CONSERVATION_OFF);
if (err)
return err;
return count;
}
static DEVICE_ATTR_RW(conservation_mode);
static ssize_t fan_mode_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long result;
int err;
err = read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result);
if (err)
return err;
return sysfs_emit(buf, "%lu\n", result);
}
static ssize_t fan_mode_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned int state;
int err;
err = kstrtouint(buf, 0, &state);
if (err)
return err;
if (state > 4 || state == 3)
return -EINVAL;
err = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
if (err)
return err;
return count;
}
static DEVICE_ATTR_RW(fan_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 hals;
int err;
err = eval_hals(priv->adev->handle, &hals);
if (err)
return err;
return sysfs_emit(buf, "%d\n", !!test_bit(HALS_FNLOCK_STATE_BIT, &hals));
}
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 err;
err = kstrtobool(buf, &state);
if (err)
return err;
err = exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
if (err)
return err;
return count;
}
static DEVICE_ATTR_RW(fn_lock);
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;
int err;
err = read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result);
if (err)
return err;
priv->r_touchpad_val = result;
return sysfs_emit(buf, "%d\n", !!result);
}
static ssize_t 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 err;
err = kstrtobool(buf, &state);
if (err)
return err;
err = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
if (err)
return err;
priv->r_touchpad_val = state;
return count;
}
static DEVICE_ATTR_RW(touchpad);
static ssize_t usb_charging_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ideapad_private *priv = dev_get_drvdata(dev);
unsigned long hals;
int err;
err = eval_hals(priv->adev->handle, &hals);
if (err)
return err;
return sysfs_emit(buf, "%d\n", !!test_bit(HALS_USB_CHARGING_STATE_BIT, &hals));
}
static ssize_t usb_charging_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 err;
err = kstrtobool(buf, &state);
if (err)
return err;
err = exec_sals(priv->adev->handle, state ? SALS_USB_CHARGING_ON : SALS_USB_CHARGING_OFF);
if (err)
return err;
return count;
}
static DEVICE_ATTR_RW(usb_charging);
static struct attribute *ideapad_attributes[] = {
&dev_attr_camera_power.attr,
&dev_attr_conservation_mode.attr,
&dev_attr_fan_mode.attr,
&dev_attr_fn_lock.attr,
&dev_attr_touchpad.attr,
&dev_attr_usb_charging.attr,
NULL
};
static umode_t ideapad_is_visible(struct kobject *kobj,
struct attribute *attr,
int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct ideapad_private *priv = dev_get_drvdata(dev);
bool supported = true;
if (attr == &dev_attr_camera_power.attr)
supported = test_bit(CFG_CAP_CAM_BIT, &priv->cfg);
else if (attr == &dev_attr_conservation_mode.attr)
supported = priv->features.conservation_mode;
else if (attr == &dev_attr_fan_mode.attr)
supported = priv->features.fan_mode;
else if (attr == &dev_attr_fn_lock.attr)
supported = priv->features.fn_lock;
else if (attr == &dev_attr_touchpad.attr)
supported = priv->features.touchpad_ctrl_via_ec;
else if (attr == &dev_attr_usb_charging.attr)
supported = priv->features.usb_charging;
return supported ? attr->mode : 0;
}
static const struct attribute_group ideapad_attribute_group = {
.is_visible = ideapad_is_visible,
.attrs = ideapad_attributes
};
/*
* DYTC Platform profile
*/
#define DYTC_CMD_QUERY 0 /* To get DYTC status - enable/revision */
#define DYTC_CMD_SET 1 /* To enable/disable IC function mode */
#define DYTC_CMD_GET 2 /* To get current IC function and mode */
#define DYTC_CMD_RESET 0x1ff /* To reset back to default */
#define DYTC_QUERY_ENABLE_BIT 8 /* Bit 8 - 0 = disabled, 1 = enabled */
#define DYTC_QUERY_SUBREV_BIT 16 /* Bits 16 - 27 - sub revision */
#define DYTC_QUERY_REV_BIT 28 /* Bits 28 - 31 - revision */
#define DYTC_GET_FUNCTION_BIT 8 /* Bits 8-11 - function setting */
#define DYTC_GET_MODE_BIT 12 /* Bits 12-15 - mode setting */
#define DYTC_SET_FUNCTION_BIT 12 /* Bits 12-15 - function setting */
#define DYTC_SET_MODE_BIT 16 /* Bits 16-19 - mode setting */
#define DYTC_SET_VALID_BIT 20 /* Bit 20 - 1 = on, 0 = off */
#define DYTC_FUNCTION_STD 0 /* Function = 0, standard mode */
#define DYTC_FUNCTION_CQL 1 /* Function = 1, lap mode */
#define DYTC_FUNCTION_MMC 11 /* Function = 11, desk mode */
#define DYTC_MODE_PERFORM 2 /* High power mode aka performance */
#define DYTC_MODE_LOW_POWER 3 /* Low power mode aka quiet */
#define DYTC_MODE_BALANCE 0xF /* Default mode aka balanced */
#define DYTC_SET_COMMAND(function, mode, on) \
(DYTC_CMD_SET | (function) << DYTC_SET_FUNCTION_BIT | \
(mode) << DYTC_SET_MODE_BIT | \
(on) << DYTC_SET_VALID_BIT)
#define DYTC_DISABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 0)
#define DYTC_ENABLE_CQL DYTC_SET_COMMAND(DYTC_FUNCTION_CQL, DYTC_MODE_BALANCE, 1)
static int convert_dytc_to_profile(int dytcmode, enum platform_profile_option *profile)
{
switch (dytcmode) {
case DYTC_MODE_LOW_POWER:
*profile = PLATFORM_PROFILE_LOW_POWER;
break;
case DYTC_MODE_BALANCE:
*profile = PLATFORM_PROFILE_BALANCED;
break;
case DYTC_MODE_PERFORM:
*profile = PLATFORM_PROFILE_PERFORMANCE;
break;
default: /* Unknown mode */
return -EINVAL;
}
return 0;
}
static int convert_profile_to_dytc(enum platform_profile_option profile, int *perfmode)
{
switch (profile) {
case PLATFORM_PROFILE_LOW_POWER:
*perfmode = DYTC_MODE_LOW_POWER;
break;
case PLATFORM_PROFILE_BALANCED:
*perfmode = DYTC_MODE_BALANCE;
break;
case PLATFORM_PROFILE_PERFORMANCE:
*perfmode = DYTC_MODE_PERFORM;
break;
default: /* Unknown profile */
return -EOPNOTSUPP;
}
return 0;
}
/*
* dytc_profile_get: Function to register with platform_profile
* handler. Returns current platform profile.
*/
static int dytc_profile_get(struct platform_profile_handler *pprof,
enum platform_profile_option *profile)
{
struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
*profile = dytc->current_profile;
return 0;
}
/*
* Helper function - check if we are in CQL mode and if we are
* - disable CQL,
* - run the command
* - enable CQL
* If not in CQL mode, just run the command
*/
static int dytc_cql_command(struct ideapad_private *priv, unsigned long cmd,
unsigned long *output)
{
int err, cmd_err, cur_funcmode;
/* Determine if we are in CQL mode. This alters the commands we do */
err = eval_dytc(priv->adev->handle, DYTC_CMD_GET, output);
if (err)
return err;
cur_funcmode = (*output >> DYTC_GET_FUNCTION_BIT) & 0xF;
/* Check if we're OK to return immediately */
if (cmd == DYTC_CMD_GET && cur_funcmode != DYTC_FUNCTION_CQL)
return 0;
if (cur_funcmode == DYTC_FUNCTION_CQL) {
err = eval_dytc(priv->adev->handle, DYTC_DISABLE_CQL, NULL);
if (err)
return err;
}
cmd_err = eval_dytc(priv->adev->handle, cmd, output);
/* Check return condition after we've restored CQL state */
if (cur_funcmode == DYTC_FUNCTION_CQL) {
err = eval_dytc(priv->adev->handle, DYTC_ENABLE_CQL, NULL);
if (err)
return err;
}
return cmd_err;
}
/*
* dytc_profile_set: Function to register with platform_profile
* handler. Sets current platform profile.
*/
static int dytc_profile_set(struct platform_profile_handler *pprof,
enum platform_profile_option profile)
{
struct ideapad_dytc_priv *dytc = container_of(pprof, struct ideapad_dytc_priv, pprof);
struct ideapad_private *priv = dytc->priv;
unsigned long output;
int err;
err = mutex_lock_interruptible(&dytc->mutex);
if (err)
return err;
if (profile == PLATFORM_PROFILE_BALANCED) {
/* To get back to balanced mode we just issue a reset command */
err = eval_dytc(priv->adev->handle, DYTC_CMD_RESET, NULL);
if (err)
goto unlock;
} else {
int perfmode;
err = convert_profile_to_dytc(profile, &perfmode);
if (err)
goto unlock;
/* Determine if we are in CQL mode. This alters the commands we do */
err = dytc_cql_command(priv, DYTC_SET_COMMAND(DYTC_FUNCTION_MMC, perfmode, 1),
&output);
if (err)
goto unlock;
}
/* Success - update current profile */
dytc->current_profile = profile;
unlock:
mutex_unlock(&dytc->mutex);
return err;
}
static void dytc_profile_refresh(struct ideapad_private *priv)
{
enum platform_profile_option profile;
unsigned long output;
int err, perfmode;
mutex_lock(&priv->dytc->mutex);
err = dytc_cql_command(priv, DYTC_CMD_GET, &output);
mutex_unlock(&priv->dytc->mutex);
if (err)
return;
perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
if (convert_dytc_to_profile(perfmode, &profile))
return;
if (profile != priv->dytc->current_profile) {
priv->dytc->current_profile = profile;
platform_profile_notify();
}
}
static const struct dmi_system_id ideapad_dytc_v4_allow_table[] = {
{
/* Ideapad 5 Pro 16ACH6 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "82L5")
}
},
{
/* Ideapad 5 15ITL05 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "IdeaPad 5 15ITL05")
}
},
{}
};
static int ideapad_dytc_profile_init(struct ideapad_private *priv)
{
int err, dytc_version;
unsigned long output;
if (!priv->features.dytc)
return -ENODEV;
err = eval_dytc(priv->adev->handle, DYTC_CMD_QUERY, &output);
/* For all other errors we can flag the failure */
if (err)
return err;
/* Check DYTC is enabled and supports mode setting */
if (!test_bit(DYTC_QUERY_ENABLE_BIT, &output)) {
dev_info(&priv->platform_device->dev, "DYTC_QUERY_ENABLE_BIT returned false\n");
return -ENODEV;
}
dytc_version = (output >> DYTC_QUERY_REV_BIT) & 0xF;
if (dytc_version < 4) {
dev_info(&priv->platform_device->dev, "DYTC_VERSION < 4 is not supported\n");
return -ENODEV;
}