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apple-ib-tb.c
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apple-ib-tb.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Apple Touch Bar Driver
*
* Copyright (c) 2017-2018 Ronald Tschalär
*/
/*
* Recent MacBookPro models (13,[23] and 14,[23]) have a touch bar, which
* is exposed via several USB interfaces. MacOS supports a fancy mode
* where arbitrary buttons can be defined; this driver currently only
* supports the simple mode that consists of 3 predefined layouts
* (escape-only, esc + special keys, and esc + function keys).
*
* The first USB HID interface supports two reports, an input report that
* is used to report the key presses, and an output report which can be
* used to set the touch bar "mode": touch bar off (in which case no touches
* are reported at all), escape key only, escape + 12 function keys, and
* escape + several special keys (including brightness, audio volume,
* etc). The second interface supports several, complex reports, most of
* which are unknown at this time, but one of which has been determined to
* allow for controlling of the touch bar's brightness: off (though touches
* are still reported), dimmed, and full brightness. This driver makes
* use of these two reports.
*/
#define dev_fmt(fmt) "tb: " fmt
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input.h>
#include <linux/jiffies.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/sysfs.h>
#include <linux/usb/ch9.h>
#include <linux/usb.h>
#include <linux/workqueue.h>
#include "apple-ibridge.h"
#define HID_UP_APPLE 0xff120000
#define HID_USAGE_MODE (HID_UP_CUSTOM | 0x0004)
#define HID_USAGE_APPLE_APP (HID_UP_APPLE | 0x0001)
#define HID_USAGE_DISP (HID_UP_APPLE | 0x0021)
#define APPLETB_MAX_TB_KEYS 13 /* ESC, F1-F12 */
#define APPLETB_CMD_MODE_ESC 0
#define APPLETB_CMD_MODE_FN 1
#define APPLETB_CMD_MODE_SPCL 2
#define APPLETB_CMD_MODE_OFF 3
#define APPLETB_CMD_MODE_NONE 255
#define APPLETB_CMD_DISP_ON 1
#define APPLETB_CMD_DISP_DIM 2
#define APPLETB_CMD_DISP_OFF 4
#define APPLETB_CMD_DISP_NONE 255
#define APPLETB_FN_MODE_FKEYS 0
#define APPLETB_FN_MODE_NORM 1
#define APPLETB_FN_MODE_INV 2
#define APPLETB_FN_MODE_SPCL 3
#define APPLETB_FN_MODE_MAX APPLETB_FN_MODE_SPCL
#define APPLETB_DEVID_KEYBOARD 1
#define APPLETB_DEVID_TOUCHPAD 2
#define APPLETB_MAX_DIM_TIME 30
static int appletb_tb_def_idle_timeout = 5 * 60;
module_param_named(idle_timeout, appletb_tb_def_idle_timeout, int, 0444);
MODULE_PARM_DESC(idle_timeout, "Default touch bar idle timeout:\n"
" >0 - turn touch bar display off after no keyboard, trackpad, or touch bar input has been received for this many seconds;\n"
" the display will be turned back on as soon as new input is received\n"
" 0 - turn touch bar display off (input does not turn it on again)\n"
" -1 - turn touch bar display on (does not turn off automatically)\n"
" -2 - disable touch bar completely");
static int appletb_tb_def_dim_timeout = -2;
module_param_named(dim_timeout, appletb_tb_def_dim_timeout, int, 0444);
MODULE_PARM_DESC(dim_timeout, "Default touch bar dim timeout:\n"
" >0 - dim touch bar display after no keyboard, trackpad, or touch bar input has been received for this many seconds\n"
" the display will be returned to full brightness as soon as new input is received\n"
" 0 - dim touch bar display (input does not return it to full brightness)\n"
" -1 - disable timeout (touch bar never dimmed)\n"
" [-2] - calculate timeout based on idle-timeout");
static int appletb_tb_def_fn_mode = APPLETB_FN_MODE_NORM;
module_param_named(fnmode, appletb_tb_def_fn_mode, int, 0444);
MODULE_PARM_DESC(fnmode, "Default Fn key mode:\n"
" 0 - function-keys only\n"
" [1] - fn key switches from special to function-keys\n"
" 2 - inverse of 1\n"
" 3 - special keys only");
static ssize_t idle_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t idle_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size);
static DEVICE_ATTR_RW(idle_timeout);
static ssize_t dim_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf);
static ssize_t dim_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size);
static DEVICE_ATTR_RW(dim_timeout);
static ssize_t fnmode_show(struct device *dev, struct device_attribute *attr,
char *buf);
static ssize_t fnmode_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size);
static DEVICE_ATTR_RW(fnmode);
static struct attribute *appletb_attrs[] = {
&dev_attr_idle_timeout.attr,
&dev_attr_dim_timeout.attr,
&dev_attr_fnmode.attr,
NULL,
};
static const struct attribute_group appletb_attr_group = {
.attrs = appletb_attrs,
};
struct appletb_device {
bool active;
struct device *log_dev;
struct appletb_report_info {
struct hid_device *hdev;
struct usb_interface *usb_iface;
unsigned int usb_epnum;
unsigned int report_id;
unsigned int report_type;
bool suspended;
} mode_info, disp_info;
struct input_handler inp_handler;
struct input_handle kbd_handle;
struct input_handle tpd_handle;
bool last_tb_keys_pressed[APPLETB_MAX_TB_KEYS];
bool last_tb_keys_translated[APPLETB_MAX_TB_KEYS];
bool last_fn_pressed;
ktime_t last_event_time;
unsigned char cur_tb_mode;
unsigned char pnd_tb_mode;
unsigned char cur_tb_disp;
unsigned char pnd_tb_disp;
bool tb_autopm_off;
bool restore_autopm;
struct delayed_work tb_work;
/* protects most of the above */
spinlock_t tb_lock;
int dim_timeout;
int idle_timeout;
bool dim_to_is_calc;
int fn_mode;
};
struct appletb_key_translation {
u16 from;
u16 to;
};
static const struct appletb_key_translation appletb_fn_codes[] = {
{ KEY_F1, KEY_BRIGHTNESSDOWN },
{ KEY_F2, KEY_BRIGHTNESSUP },
{ KEY_F3, KEY_SCALE }, /* not used */
{ KEY_F4, KEY_DASHBOARD }, /* not used */
{ KEY_F5, KEY_KBDILLUMDOWN },
{ KEY_F6, KEY_KBDILLUMUP },
{ KEY_F7, KEY_PREVIOUSSONG },
{ KEY_F8, KEY_PLAYPAUSE },
{ KEY_F9, KEY_NEXTSONG },
{ KEY_F10, KEY_MUTE },
{ KEY_F11, KEY_VOLUMEDOWN },
{ KEY_F12, KEY_VOLUMEUP },
};
static struct hid_driver appletb_hid_driver;
static int appletb_send_hid_report(struct appletb_report_info *rinfo,
__u8 requesttype, void *data, __u16 size)
{
void *buffer;
struct usb_device *dev = interface_to_usbdev(rinfo->usb_iface);
u8 ifnum = rinfo->usb_iface->cur_altsetting->desc.bInterfaceNumber;
int tries = 0;
int rc;
buffer = kmemdup(data, size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
do {
rc = usb_control_msg(dev,
usb_sndctrlpipe(dev, rinfo->usb_epnum),
HID_REQ_SET_REPORT, requesttype,
rinfo->report_type << 8 | rinfo->report_id,
ifnum, buffer, size, 2000);
if (rc != -EPIPE)
break;
usleep_range(1000 << tries, 3000 << tries);
} while (++tries < 5);
kfree(buffer);
return (rc > 0) ? 0 : rc;
}
static bool appletb_disable_autopm(struct appletb_report_info *rinfo)
{
int rc;
rc = usb_autopm_get_interface(rinfo->usb_iface);
if (rc == 0)
return true;
hid_err(rinfo->hdev,
"Failed to disable auto-pm on touch bar device (%d)\n", rc);
return false;
}
static int appletb_set_tb_mode(struct appletb_device *tb_dev,
unsigned char mode)
{
int rc;
bool autopm_off = false;
if (!tb_dev->mode_info.usb_iface)
return -ENOTCONN;
autopm_off = appletb_disable_autopm(&tb_dev->mode_info);
rc = appletb_send_hid_report(&tb_dev->mode_info,
USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
&mode, 1);
if (rc < 0)
dev_err(tb_dev->log_dev,
"Failed to set touch bar mode to %u (%d)\n", mode, rc);
if (autopm_off)
usb_autopm_put_interface(tb_dev->mode_info.usb_iface);
return rc;
}
static int appletb_set_tb_disp(struct appletb_device *tb_dev,
unsigned char disp)
{
unsigned char report[] = { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int rc;
if (!tb_dev->disp_info.usb_iface)
return -ENOTCONN;
/*
* Keep the USB interface powered on while the touch bar display is on
* for better responsiveness.
*/
if (disp != APPLETB_CMD_DISP_OFF &&
tb_dev->cur_tb_disp == APPLETB_CMD_DISP_OFF)
tb_dev->tb_autopm_off =
appletb_disable_autopm(&tb_dev->disp_info);
report[0] = tb_dev->disp_info.report_id;
report[2] = disp;
rc = appletb_send_hid_report(&tb_dev->disp_info,
USB_DIR_OUT | USB_TYPE_CLASS |
USB_RECIP_INTERFACE,
report, sizeof(report));
if (rc < 0)
dev_err(tb_dev->log_dev,
"Failed to set touch bar display to %u (%d)\n", disp,
rc);
if (disp == APPLETB_CMD_DISP_OFF &&
tb_dev->cur_tb_disp != APPLETB_CMD_DISP_OFF) {
if (tb_dev->tb_autopm_off) {
usb_autopm_put_interface(tb_dev->disp_info.usb_iface);
tb_dev->tb_autopm_off = false;
}
}
return rc;
}
static bool appletb_any_tb_key_pressed(struct appletb_device *tb_dev)
{
int idx;
for (idx = 0; idx < ARRAY_SIZE(tb_dev->last_tb_keys_pressed); idx++) {
if (tb_dev->last_tb_keys_pressed[idx])
return true;
}
return false;
}
static void appletb_schedule_tb_update(struct appletb_device *tb_dev, s64 secs)
{
schedule_delayed_work(&tb_dev->tb_work, msecs_to_jiffies(secs * 1000));
}
static void appletb_set_tb_worker(struct work_struct *work)
{
struct appletb_device *tb_dev =
container_of(work, struct appletb_device, tb_work.work);
s64 time_left = 0, min_timeout, time_to_off;
unsigned char pending_mode;
unsigned char pending_disp;
unsigned char current_disp;
bool restore_autopm;
bool any_tb_key_pressed, need_reschedule;
int rc1 = 1, rc2 = 1;
unsigned long flags;
spin_lock_irqsave(&tb_dev->tb_lock, flags);
/* handle explicit mode-change request */
pending_mode = tb_dev->pnd_tb_mode;
pending_disp = tb_dev->pnd_tb_disp;
restore_autopm = tb_dev->restore_autopm;
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
if (pending_mode != APPLETB_CMD_MODE_NONE)
rc1 = appletb_set_tb_mode(tb_dev, pending_mode);
if (pending_mode != APPLETB_CMD_MODE_NONE &&
pending_disp != APPLETB_CMD_DISP_NONE)
msleep(25);
if (pending_disp != APPLETB_CMD_DISP_NONE)
rc2 = appletb_set_tb_disp(tb_dev, pending_disp);
if (restore_autopm && tb_dev->tb_autopm_off)
appletb_disable_autopm(&tb_dev->disp_info);
spin_lock_irqsave(&tb_dev->tb_lock, flags);
need_reschedule = false;
if (rc1 == 0) {
tb_dev->cur_tb_mode = pending_mode;
if (tb_dev->pnd_tb_mode == pending_mode)
tb_dev->pnd_tb_mode = APPLETB_CMD_MODE_NONE;
else
need_reschedule = true;
}
if (rc2 == 0) {
tb_dev->cur_tb_disp = pending_disp;
if (tb_dev->pnd_tb_disp == pending_disp)
tb_dev->pnd_tb_disp = APPLETB_CMD_DISP_NONE;
else
need_reschedule = true;
}
current_disp = tb_dev->cur_tb_disp;
tb_dev->restore_autopm = false;
/* calculate time left to next timeout */
if (tb_dev->idle_timeout == -2 || tb_dev->idle_timeout == 0)
min_timeout = -1;
else if (tb_dev->idle_timeout == -1)
min_timeout = tb_dev->dim_timeout;
else if (tb_dev->dim_timeout <= 0)
min_timeout = tb_dev->idle_timeout;
else
min_timeout = min(tb_dev->dim_timeout, tb_dev->idle_timeout);
if (min_timeout > 0) {
s64 idle_time =
(ktime_ms_delta(ktime_get(), tb_dev->last_event_time) +
500) / 1000;
time_left = max(min_timeout - idle_time, 0LL);
if (tb_dev->idle_timeout <= 0)
time_to_off = -1;
else if (idle_time >= tb_dev->idle_timeout)
time_to_off = 0;
else
time_to_off = tb_dev->idle_timeout - idle_time;
} else {
/* not used - just to appease the compiler */
time_to_off = 0;
}
any_tb_key_pressed = appletb_any_tb_key_pressed(tb_dev);
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
/* a new command arrived while we were busy - handle it */
if (need_reschedule) {
appletb_schedule_tb_update(tb_dev, 0);
return;
}
/* if no idle/dim timeout, we're done */
if (min_timeout <= 0)
return;
/* manage idle/dim timeout */
if (time_left > 0) {
/* we fired too soon or had a mode-change - re-schedule */
appletb_schedule_tb_update(tb_dev, time_left);
} else if (any_tb_key_pressed) {
/* keys are still pressed - re-schedule */
appletb_schedule_tb_update(tb_dev, min_timeout);
} else {
/* dim or idle timeout reached */
int next_disp = (time_to_off == 0) ? APPLETB_CMD_DISP_OFF :
APPLETB_CMD_DISP_DIM;
if (next_disp != current_disp &&
appletb_set_tb_disp(tb_dev, next_disp) == 0) {
spin_lock_irqsave(&tb_dev->tb_lock, flags);
tb_dev->cur_tb_disp = next_disp;
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
}
if (time_to_off > 0)
appletb_schedule_tb_update(tb_dev, time_to_off);
}
}
static u16 appletb_fn_to_special(u16 code)
{
int idx;
for (idx = 0; idx < ARRAY_SIZE(appletb_fn_codes); idx++) {
if (appletb_fn_codes[idx].from == code)
return appletb_fn_codes[idx].to;
}
return 0;
}
static unsigned char appletb_get_cur_tb_mode(struct appletb_device *tb_dev)
{
return tb_dev->pnd_tb_mode != APPLETB_CMD_MODE_NONE ?
tb_dev->pnd_tb_mode : tb_dev->cur_tb_mode;
}
static unsigned char appletb_get_cur_tb_disp(struct appletb_device *tb_dev)
{
return tb_dev->pnd_tb_disp != APPLETB_CMD_DISP_NONE ?
tb_dev->pnd_tb_disp : tb_dev->cur_tb_disp;
}
static unsigned char appletb_get_fn_tb_mode(struct appletb_device *tb_dev)
{
switch (tb_dev->fn_mode) {
case APPLETB_FN_MODE_FKEYS:
return APPLETB_CMD_MODE_FN;
case APPLETB_FN_MODE_SPCL:
return APPLETB_CMD_MODE_SPCL;
case APPLETB_FN_MODE_INV:
return (tb_dev->last_fn_pressed) ? APPLETB_CMD_MODE_SPCL :
APPLETB_CMD_MODE_FN;
case APPLETB_FN_MODE_NORM:
default:
return (tb_dev->last_fn_pressed) ? APPLETB_CMD_MODE_FN :
APPLETB_CMD_MODE_SPCL;
}
}
/*
* Switch touch bar mode and display when mode or display not the desired ones.
*/
static void appletb_update_touchbar_no_lock(struct appletb_device *tb_dev,
bool force)
{
unsigned char want_mode;
unsigned char want_disp;
bool need_update = false;
/*
* Calculate the new modes:
* idle_timeout:
* -2 mode/disp off
* -1 mode on, disp on/dim
* 0 mode on, disp off
* >0 mode on, disp off after idle_timeout seconds
* dim_timeout (only valid if idle_timeout > 0 || idle_timeout == -1):
* -1 disp never dimmed
* 0 disp always dimmed
* >0 disp dim after dim_timeout seconds
*/
if (tb_dev->idle_timeout == -2) {
want_mode = APPLETB_CMD_MODE_OFF;
want_disp = APPLETB_CMD_DISP_OFF;
} else {
want_mode = appletb_get_fn_tb_mode(tb_dev);
want_disp = tb_dev->idle_timeout == 0 ? APPLETB_CMD_DISP_OFF :
tb_dev->dim_timeout == 0 ? APPLETB_CMD_DISP_DIM :
APPLETB_CMD_DISP_ON;
}
/*
* See if we need to update the touch bar, taking into account that we
* generally don't want to switch modes while a touch bar key is
* pressed.
*/
if (appletb_get_cur_tb_mode(tb_dev) != want_mode &&
!appletb_any_tb_key_pressed(tb_dev)) {
tb_dev->pnd_tb_mode = want_mode;
need_update = true;
}
if (appletb_get_cur_tb_disp(tb_dev) != want_disp &&
(!appletb_any_tb_key_pressed(tb_dev) ||
(appletb_any_tb_key_pressed(tb_dev) &&
want_disp != APPLETB_CMD_DISP_OFF))) {
tb_dev->pnd_tb_disp = want_disp;
need_update = true;
}
if (force)
need_update = true;
/* schedule the update if desired */
dev_dbg_ratelimited(tb_dev->log_dev,
"update: need_update=%d, want_mode=%d, cur-mode=%d, want_disp=%d, cur-disp=%d\n",
need_update, want_mode, tb_dev->cur_tb_mode,
want_disp, tb_dev->cur_tb_disp);
if (need_update) {
cancel_delayed_work(&tb_dev->tb_work);
appletb_schedule_tb_update(tb_dev, 0);
}
}
static void appletb_update_touchbar(struct appletb_device *tb_dev, bool force)
{
unsigned long flags;
spin_lock_irqsave(&tb_dev->tb_lock, flags);
if (tb_dev->active)
appletb_update_touchbar_no_lock(tb_dev, force);
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
}
static void appletb_set_idle_timeout(struct appletb_device *tb_dev, int new)
{
tb_dev->idle_timeout = new;
if (tb_dev->dim_to_is_calc && tb_dev->idle_timeout > 0)
tb_dev->dim_timeout = new - min(APPLETB_MAX_DIM_TIME, new / 3);
else if (tb_dev->dim_to_is_calc)
tb_dev->dim_timeout = -1;
}
static ssize_t idle_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
return snprintf(buf, PAGE_SIZE, "%d\n", tb_dev->idle_timeout);
}
static ssize_t idle_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
long new;
int rc;
rc = kstrtol(buf, 0, &new);
if (rc || new > INT_MAX || new < -2)
return -EINVAL;
appletb_set_idle_timeout(tb_dev, new);
appletb_update_touchbar(tb_dev, true);
return size;
}
static void appletb_set_dim_timeout(struct appletb_device *tb_dev, int new)
{
if (new == -2) {
tb_dev->dim_to_is_calc = true;
appletb_set_idle_timeout(tb_dev, tb_dev->idle_timeout);
} else {
tb_dev->dim_to_is_calc = false;
tb_dev->dim_timeout = new;
}
}
static ssize_t dim_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
return snprintf(buf, PAGE_SIZE, "%d\n",
tb_dev->dim_to_is_calc ? -2 : tb_dev->dim_timeout);
}
static ssize_t dim_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
long new;
int rc;
rc = kstrtol(buf, 0, &new);
if (rc || new > INT_MAX || new < -2)
return -EINVAL;
appletb_set_dim_timeout(tb_dev, new);
appletb_update_touchbar(tb_dev, true);
return size;
}
static ssize_t fnmode_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
return snprintf(buf, PAGE_SIZE, "%d\n", tb_dev->fn_mode);
}
static ssize_t fnmode_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(dev_get_drvdata(dev), &appletb_hid_driver);
long new;
int rc;
rc = kstrtol(buf, 0, &new);
if (rc || new > APPLETB_FN_MODE_MAX || new < 0)
return -EINVAL;
tb_dev->fn_mode = new;
appletb_update_touchbar(tb_dev, false);
return size;
}
static int appletb_tb_key_to_slot(unsigned int code)
{
switch (code) {
case KEY_ESC:
return 0;
case KEY_F1:
case KEY_F2:
case KEY_F3:
case KEY_F4:
case KEY_F5:
case KEY_F6:
case KEY_F7:
case KEY_F8:
case KEY_F9:
case KEY_F10:
return code - KEY_F1 + 1;
case KEY_F11:
case KEY_F12:
return code - KEY_F11 + 11;
default:
return -1;
}
}
static int appletb_hid_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
struct appletb_device *tb_dev =
appleib_get_drvdata(hid_get_drvdata(hdev), &appletb_hid_driver);
unsigned int new_code = 0;
unsigned long flags;
bool send_dummy = false;
bool send_trnsl = false;
int slot;
int rc = 0;
/* Only interested in keyboard events */
if ((usage->hid & HID_USAGE_PAGE) != HID_UP_KEYBOARD ||
usage->type != EV_KEY)
return 0;
/*
* Skip non-touch-bar keys.
*
* Either the touch bar itself or usbhid generate a slew of key-down
* events for all the meta keys. None of which we're at all interested
* in.
*/
slot = appletb_tb_key_to_slot(usage->code);
if (slot < 0)
return 0;
spin_lock_irqsave(&tb_dev->tb_lock, flags);
if (!tb_dev->active) {
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
return 0;
}
new_code = appletb_fn_to_special(usage->code);
/* remember which (untranslated) touch bar keys are pressed */
if (value != 2)
tb_dev->last_tb_keys_pressed[slot] = value;
/* remember last time keyboard or touchpad was touched */
tb_dev->last_event_time = ktime_get();
/* only switch touch bar mode when no touch bar keys are pressed */
appletb_update_touchbar_no_lock(tb_dev, false);
/*
* We want to suppress touch bar keys while the touch bar is off, but
* we do want to wake up the screen if it's asleep, so generate a dummy
* event.
*/
if (tb_dev->cur_tb_mode == APPLETB_CMD_MODE_OFF ||
tb_dev->cur_tb_disp == APPLETB_CMD_DISP_OFF) {
send_dummy = true;
rc = 1;
/* translate special keys */
} else if (new_code &&
((value > 0 &&
appletb_get_cur_tb_mode(tb_dev) == APPLETB_CMD_MODE_SPCL)
||
(value == 0 && tb_dev->last_tb_keys_translated[slot]))) {
tb_dev->last_tb_keys_translated[slot] = true;
send_trnsl = true;
rc = 1;
/* everything else handled normally */
} else {
tb_dev->last_tb_keys_translated[slot] = false;
}
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
/*
* Need to send these input events outside of the lock, as otherwise
* we can run into the following deadlock:
* Task 1 Task 2
* appletb_hid_event() input_event()
* acquire tb_lock acquire dev->event_lock
* input_event() appletb_inp_event()
* acquire dev->event_lock acquire tb_lock
*/
if (send_dummy) {
input_event(field->hidinput->input, EV_KEY, KEY_UNKNOWN, 1);
input_event(field->hidinput->input, EV_KEY, KEY_UNKNOWN, 0);
} else if (send_trnsl) {
input_event(field->hidinput->input, usage->type, new_code,
value);
}
return rc;
}
static void appletb_inp_event(struct input_handle *handle, unsigned int type,
unsigned int code, int value)
{
struct appletb_device *tb_dev = handle->private;
unsigned long flags;
spin_lock_irqsave(&tb_dev->tb_lock, flags);
if (!tb_dev->active) {
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
return;
}
/* remember last state of FN key */
if (type == EV_KEY && code == KEY_FN && value != 2)
tb_dev->last_fn_pressed = value;
/* remember last time keyboard or touchpad was touched */
tb_dev->last_event_time = ktime_get();
/* only switch touch bar mode when no touch bar keys are pressed */
appletb_update_touchbar_no_lock(tb_dev, false);
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
}
/* Find and save the usb-device associated with the touch bar input device */
static struct usb_interface *appletb_get_usb_iface(struct hid_device *hdev)
{
struct device *dev = &hdev->dev;
/* in kernel: is_usb_interface(dev) */
while (dev && (!dev->type || strcmp(dev->type->name, "usb_interface")))
dev = dev->parent;
return dev ? to_usb_interface(dev) : NULL;
}
static int appletb_inp_connect(struct input_handler *handler,
struct input_dev *dev,
const struct input_device_id *id)
{
struct appletb_device *tb_dev = handler->private;
struct input_handle *handle;
int rc;
if (id->driver_info == APPLETB_DEVID_KEYBOARD) {
handle = &tb_dev->kbd_handle;
handle->name = "tbkbd";
} else if (id->driver_info == APPLETB_DEVID_TOUCHPAD) {
handle = &tb_dev->tpd_handle;
handle->name = "tbtpad";
} else {
dev_err(tb_dev->log_dev, "Unknown device id (%lu)\n",
id->driver_info);
return -ENOENT;
}
if (handle->dev) {
dev_err(tb_dev->log_dev,
"Duplicate connect to %s input device\n", handle->name);
return -EEXIST;
}
handle->open = 0;
handle->dev = input_get_device(dev);
handle->handler = handler;
handle->private = tb_dev;
rc = input_register_handle(handle);
if (rc)
goto err_free_dev;
rc = input_open_device(handle);
if (rc)
goto err_unregister_handle;
dev_dbg(tb_dev->log_dev, "Connected to %s input device\n",
handle == &tb_dev->kbd_handle ? "keyboard" : "touchpad");
return 0;
err_unregister_handle:
input_unregister_handle(handle);
err_free_dev:
input_put_device(handle->dev);
handle->dev = NULL;
return rc;
}
static void appletb_inp_disconnect(struct input_handle *handle)
{
struct appletb_device *tb_dev = handle->private;
input_close_device(handle);
input_unregister_handle(handle);
dev_dbg(tb_dev->log_dev, "Disconnected from %s input device\n",
handle == &tb_dev->kbd_handle ? "keyboard" : "touchpad");
input_put_device(handle->dev);
handle->dev = NULL;
}
static int appletb_input_configured(struct hid_device *hdev,
struct hid_input *hidinput)
{
int idx;
struct input_dev *input = hidinput->input;
/*
* Clear various input capabilities that are blindly set by the hid
* driver (usbkbd.c)
*/
memset(input->evbit, 0, sizeof(input->evbit));
memset(input->keybit, 0, sizeof(input->keybit));
memset(input->ledbit, 0, sizeof(input->ledbit));
/* set our actual capabilities */
__set_bit(EV_KEY, input->evbit);
__set_bit(EV_REP, input->evbit);
__set_bit(EV_MSC, input->evbit); /* hid-input generates MSC_SCAN */
for (idx = 0; idx < ARRAY_SIZE(appletb_fn_codes); idx++) {
input_set_capability(input, EV_KEY, appletb_fn_codes[idx].from);
input_set_capability(input, EV_KEY, appletb_fn_codes[idx].to);
}
input_set_capability(input, EV_KEY, KEY_ESC);
input_set_capability(input, EV_KEY, KEY_UNKNOWN);
return 0;
}
static int appletb_fill_report_info(struct appletb_device *tb_dev,
struct hid_device *hdev)
{
struct appletb_report_info *report_info = NULL;
struct usb_interface *usb_iface;
struct hid_field *field;
field = appleib_find_hid_field(hdev, HID_GD_KEYBOARD, HID_USAGE_MODE);
if (field) {
report_info = &tb_dev->mode_info;
} else {
field = appleib_find_hid_field(hdev, HID_USAGE_APPLE_APP,
HID_USAGE_DISP);
if (field)
report_info = &tb_dev->disp_info;
}
if (!report_info)
return 0;
usb_iface = appletb_get_usb_iface(hdev);
if (!usb_iface) {
dev_err(tb_dev->log_dev,
"Failed to find usb interface for hid device %s\n",
dev_name(&hdev->dev));
return -ENODEV;
}
report_info->hdev = hdev;
report_info->usb_iface = usb_get_intf(usb_iface);
report_info->usb_epnum = 0;
report_info->report_id = field->report->id;
switch (field->report->type) {
case HID_INPUT_REPORT:
report_info->report_type = 0x01; break;
case HID_OUTPUT_REPORT:
report_info->report_type = 0x02; break;
case HID_FEATURE_REPORT:
report_info->report_type = 0x03; break;
}
return 1;
}
static struct appletb_report_info *
appletb_get_report_info(struct appletb_device *tb_dev, struct hid_device *hdev)
{
if (hdev == tb_dev->mode_info.hdev)
return &tb_dev->mode_info;
if (hdev == tb_dev->disp_info.hdev)
return &tb_dev->disp_info;
return NULL;
}
static void appletb_mark_active(struct appletb_device *tb_dev, bool active)
{
unsigned long flags;
spin_lock_irqsave(&tb_dev->tb_lock, flags);
tb_dev->active = active;
spin_unlock_irqrestore(&tb_dev->tb_lock, flags);
}
static const struct input_device_id appletb_input_devices[] = {
{
.flags = INPUT_DEVICE_ID_MATCH_BUS |
INPUT_DEVICE_ID_MATCH_KEYBIT,
.bustype = BUS_SPI,
.keybit = { [BIT_WORD(KEY_FN)] = BIT_MASK(KEY_FN) },
.driver_info = APPLETB_DEVID_KEYBOARD,
}, /* Builtin keyboard device */
{
.flags = INPUT_DEVICE_ID_MATCH_BUS |
INPUT_DEVICE_ID_MATCH_KEYBIT,
.bustype = BUS_SPI,
.keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
.driver_info = APPLETB_DEVID_TOUCHPAD,
}, /* Builtin touchpad device */
{ }, /* Terminating zero entry */
};
static int appletb_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{