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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Browse source 
Pull input updates from Dmitry Torokhov:

 - a new driver to ChipOne icn8505 based touchscreens

 - on certain systems with Elan touch controllers they will be switched
   away form PS/2 emulation and over to native SMbus mode

 - assorted driver fixups and improvements

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (24 commits)
  Input: elan_i2c - add ELAN0612 (Lenovo v330 14IKB) ACPI ID
  Input: goodix - add new ACPI id for GPD Win 2 touch screen
  Input: xpad - add GPD Win 2 Controller USB IDs
  Input: ti_am335x_tsc - prevent system suspend when TSC is in use
  Input: ti_am335x_tsc - ack pending IRQs at probe and before suspend
  Input: cros_ec_keyb - mark cros_ec_keyb driver as wake enabled device.
  Input: mk712 - update documentation web link
  Input: atmel_mxt_ts - fix reset-gpio for level based irqs
  Input: atmel_mxt_ts - require device properties present when probing
  Input: psmouse-smbus - allow to control psmouse_deactivate
  Input: elantech - detect new ICs and setup Host Notify for them
  Input: elantech - add support for SMBus devices
  Input: elantech - query the resolution in query_info
  Input: elantech - split device info into a separate structure
  Input: elan_i2c - add trackstick report
  Input: usbtouchscreen - add sysfs attribute for 3M MTouch firmware rev
  Input: ati_remote2 - fix typo 'can by' to 'can be'
  Input: replace hard coded string with __func__ in pr_err()
  Input: add support for ChipOne icn8505 based touchscreens
  Input: gamecon - avoid using __set_bit() for capabilities
  ...
This commit is contained in:
Linus Torvalds 2018-06-05 16:05:14 -07:00
commit 2158091d9c
26 changed files with 1327 additions and 391 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
Documentation/devicetree/bindings/input/elan_i2c.txt
View file

@ -14,6 +14,7 @@ Optional properties:
- pinctrl-0: a phandle pointing to the pin settings for the device (see
pinctrl binding [1]).
- vcc-supply: a phandle for the regulator supplying 3.3V power.
- elan,trackpoint: touchpad can support a trackpoint (boolean)
[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt

6
MAINTAINERS
View file

@ -3431,6 +3431,12 @@ S: Maintained
F: Documentation/devicetree/bindings/input/touchscreen/chipone_icn8318.txt
F: drivers/input/touchscreen/chipone_icn8318.c
CHIPONE ICN8505 I2C TOUCHSCREEN DRIVER
M: Hans de Goede <hdegoede@redhat.com>
L: linux-input@vger.kernel.org
S: Maintained
F: drivers/input/touchscreen/chipone_icn8505.c
CHROME HARDWARE PLATFORM SUPPORT
M: Benson Leung <bleung@chromium.org>
M: Olof Johansson <olof@lixom.net>

3
drivers/input/input.c
View file

@ -1943,8 +1943,7 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
break;
default:
pr_err("input_set_capability: unknown type %u (code %u)\n",
type, code);
pr_err("%s: unknown type %u (code %u)\n", __func__, type, code);
dump_stack();
return;
}

4
drivers/input/joystick/as5011.c
View file

@ -269,9 +269,7 @@ static int as5011_probe(struct i2c_client *client,
input_dev->id.bustype = BUS_I2C;
input_dev->dev.parent = &client->dev;
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(BTN_JOYSTICK, input_dev->keybit);
input_set_capability(input_dev, EV_KEY, BTN_JOYSTICK);
input_set_abs_params(input_dev, ABS_X,
AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);

27
drivers/input/joystick/gamecon.c
View file

@ -862,7 +862,7 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
case GC_N64:
for (i = 0; i < 10; i++)
__set_bit(gc_n64_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, gc_n64_btn[i]);
for (i = 0; i < 2; i++) {
input_set_abs_params(input_dev, ABS_X + i, -127, 126, 0, 2);
@ -879,26 +879,27 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
break;
case GC_SNESMOUSE:
__set_bit(BTN_LEFT, input_dev->keybit);
__set_bit(BTN_RIGHT, input_dev->keybit);
__set_bit(REL_X, input_dev->relbit);
__set_bit(REL_Y, input_dev->relbit);
input_set_capability(input_dev, EV_KEY, BTN_LEFT);
input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
input_set_capability(input_dev, EV_REL, REL_X);
input_set_capability(input_dev, EV_REL, REL_Y);
break;
case GC_SNES:
for (i = 4; i < 8; i++)
__set_bit(gc_snes_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
/* fall through */
case GC_NES:
for (i = 0; i < 4; i++)
__set_bit(gc_snes_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, gc_snes_btn[i]);
break;
case GC_MULTI2:
__set_bit(BTN_THUMB, input_dev->keybit);
input_set_capability(input_dev, EV_KEY, BTN_THUMB);
/* fall through */
case GC_MULTI:
__set_bit(BTN_TRIGGER, input_dev->keybit);
input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
/* fall through */
break;
case GC_PSX:
@ -906,15 +907,17 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
input_set_abs_params(input_dev,
gc_psx_abs[i], 4, 252, 0, 2);
for (i = 0; i < 12; i++)
__set_bit(gc_psx_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
break;
break;
case GC_DDR:
for (i = 0; i < 4; i++)
__set_bit(gc_psx_ddr_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY,
gc_psx_ddr_btn[i]);
for (i = 0; i < 12; i++)
__set_bit(gc_psx_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, gc_psx_btn[i]);
break;
}

35
drivers/input/joystick/xpad.c
View file

@ -86,8 +86,10 @@
#define XPAD_PKT_LEN 64
/* xbox d-pads should map to buttons, as is required for DDR pads
but we map them to axes when possible to simplify things */
/*
* xbox d-pads should map to buttons, as is required for DDR pads
* but we map them to axes when possible to simplify things
*/
#define MAP_DPAD_TO_BUTTONS (1 << 0)
#define MAP_TRIGGERS_TO_BUTTONS (1 << 1)
#define MAP_STICKS_TO_NULL (1 << 2)
@ -123,6 +125,7 @@ static const struct xpad_device {
u8 mapping;
u8 xtype;
} xpad_device[] = {
{ 0x0079, 0x18d4, "GPD Win 2 Controller", 0, XTYPE_XBOX360 },
{ 0x044f, 0x0f00, "Thrustmaster Wheel", 0, XTYPE_XBOX },
{ 0x044f, 0x0f03, "Thrustmaster Wheel", 0, XTYPE_XBOX },
{ 0x044f, 0x0f07, "Thrustmaster, Inc. Controller", 0, XTYPE_XBOX },
@ -387,15 +390,15 @@ static const signed short xpad_abs_triggers[] = {
* match against vendor id as well. Wired Xbox 360 devices have protocol 1,
* wireless controllers have protocol 129.
*/
#define XPAD_XBOX360_VENDOR_PROTOCOL(vend,pr) \
#define XPAD_XBOX360_VENDOR_PROTOCOL(vend, pr) \
.match_flags = USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_INT_INFO, \
.idVendor = (vend), \
.bInterfaceClass = USB_CLASS_VENDOR_SPEC, \
.bInterfaceSubClass = 93, \
.bInterfaceProtocol = (pr)
#define XPAD_XBOX360_VENDOR(vend) \
{ XPAD_XBOX360_VENDOR_PROTOCOL(vend,1) }, \
{ XPAD_XBOX360_VENDOR_PROTOCOL(vend,129) }
{ XPAD_XBOX360_VENDOR_PROTOCOL((vend), 1) }, \
{ XPAD_XBOX360_VENDOR_PROTOCOL((vend), 129) }
/* The Xbox One controller uses subclass 71 and protocol 208. */
#define XPAD_XBOXONE_VENDOR_PROTOCOL(vend, pr) \
@ -405,10 +408,11 @@ static const signed short xpad_abs_triggers[] = {
.bInterfaceSubClass = 71, \
.bInterfaceProtocol = (pr)
#define XPAD_XBOXONE_VENDOR(vend) \
{ XPAD_XBOXONE_VENDOR_PROTOCOL(vend, 208) }
{ XPAD_XBOXONE_VENDOR_PROTOCOL((vend), 208) }
static const struct usb_device_id xpad_table[] = {
{ USB_INTERFACE_INFO('X', 'B', 0) }, /* X-Box USB-IF not approved class */
XPAD_XBOX360_VENDOR(0x0079), /* GPD Win 2 Controller */
XPAD_XBOX360_VENDOR(0x044f), /* Thrustmaster X-Box 360 controllers */
XPAD_XBOX360_VENDOR(0x045e), /* Microsoft X-Box 360 controllers */
XPAD_XBOXONE_VENDOR(0x045e), /* Microsoft X-Box One controllers */
@ -1573,7 +1577,6 @@ static void xpad_close(struct input_dev *dev)
static void xpad_set_up_abs(struct input_dev *input_dev, signed short abs)
{
struct usb_xpad *xpad = input_get_drvdata(input_dev);
set_bit(abs, input_dev->absbit);
switch (abs) {
case ABS_X:
@ -1593,6 +1596,9 @@ static void xpad_set_up_abs(struct input_dev *input_dev, signed short abs)
case ABS_HAT0Y: /* the d-pad (only if dpad is mapped to axes */
input_set_abs_params(input_dev, abs, -1, 1, 0, 0);
break;
default:
input_set_abs_params(input_dev, abs, 0, 0, 0, 0);
break;
}
}
@ -1633,10 +1639,7 @@ static int xpad_init_input(struct usb_xpad *xpad)
input_dev->close = xpad_close;
}
__set_bit(EV_KEY, input_dev->evbit);
if (!(xpad->mapping & MAP_STICKS_TO_NULL)) {
__set_bit(EV_ABS, input_dev->evbit);
/* set up axes */
for (i = 0; xpad_abs[i] >= 0; i++)
xpad_set_up_abs(input_dev, xpad_abs[i]);
@ -1644,21 +1647,22 @@ static int xpad_init_input(struct usb_xpad *xpad)
/* set up standard buttons */
for (i = 0; xpad_common_btn[i] >= 0; i++)
__set_bit(xpad_common_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, xpad_common_btn[i]);
/* set up model-specific ones */
if (xpad->xtype == XTYPE_XBOX360 || xpad->xtype == XTYPE_XBOX360W ||
xpad->xtype == XTYPE_XBOXONE) {
for (i = 0; xpad360_btn[i] >= 0; i++)
__set_bit(xpad360_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, xpad360_btn[i]);
} else {
for (i = 0; xpad_btn[i] >= 0; i++)
__set_bit(xpad_btn[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY, xpad_btn[i]);
}
if (xpad->mapping & MAP_DPAD_TO_BUTTONS) {
for (i = 0; xpad_btn_pad[i] >= 0; i++)
__set_bit(xpad_btn_pad[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY,
xpad_btn_pad[i]);
}
/*
@ -1675,7 +1679,8 @@ static int xpad_init_input(struct usb_xpad *xpad)
if (xpad->mapping & MAP_TRIGGERS_TO_BUTTONS) {
for (i = 0; xpad_btn_triggers[i] >= 0; i++)
__set_bit(xpad_btn_triggers[i], input_dev->keybit);
input_set_capability(input_dev, EV_KEY,
xpad_btn_triggers[i]);
} else {
for (i = 0; xpad_abs_triggers[i] >= 0; i++)
xpad_set_up_abs(input_dev, xpad_abs_triggers[i]);

33
drivers/input/keyboard/cros_ec_keyb.c
View file

@ -244,24 +244,35 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
switch (ckdev->ec->event_data.event_type) {
case EC_MKBP_EVENT_KEY_MATRIX:
/*
* If EC is not the wake source, discard key state changes
* during suspend.
*/
if (queued_during_suspend)
return NOTIFY_OK;
if (device_may_wakeup(ckdev->dev)) {
pm_wakeup_event(ckdev->dev, 0);
} else {
/*
* If keyboard is not wake enabled, discard key state
* changes during suspend. Switches will be re-checked
* in cros_ec_keyb_resume() to be sure nothing is lost.
*/
if (queued_during_suspend)
return NOTIFY_OK;
}
if (ckdev->ec->event_size != ckdev->cols) {
dev_err(ckdev->dev,
"Discarded incomplete key matrix event.\n");
return NOTIFY_OK;
}
cros_ec_keyb_process(ckdev,
ckdev->ec->event_data.data.key_matrix,
ckdev->ec->event_size);
break;
case EC_MKBP_EVENT_SYSRQ:
if (device_may_wakeup(ckdev->dev))
pm_wakeup_event(ckdev->dev, 0);
else if (queued_during_suspend)
return NOTIFY_OK;
val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq);
dev_dbg(ckdev->dev, "sysrq code from EC: %#x\n", val);
handle_sysrq(val);
@ -269,12 +280,9 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
case EC_MKBP_EVENT_BUTTON:
case EC_MKBP_EVENT_SWITCH:
/*
* If EC is not the wake source, discard key state
* changes during suspend. Switches will be re-checked in
* cros_ec_keyb_resume() to be sure nothing is lost.
*/
if (queued_during_suspend)
if (device_may_wakeup(ckdev->dev))
pm_wakeup_event(ckdev->dev, 0);
else if (queued_during_suspend)
return NOTIFY_OK;
if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) {
@ -639,6 +647,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
return err;
}
device_init_wakeup(ckdev->dev, true);
return 0;
}

2
drivers/input/misc/ati_remote2.c
View file

@ -22,7 +22,7 @@ MODULE_LICENSE("GPL");
/*
* ATI Remote Wonder II Channel Configuration
*
* The remote control can by assigned one of sixteen "channels" in order to facilitate
* The remote control can be assigned one of sixteen "channels" in order to facilitate
* the use of multiple remote controls within range of each other.
* A remote's "channel" may be altered by pressing and holding the "PC" button for
* approximately 3 seconds, after which the button will slowly flash the count of the

12
drivers/input/mouse/Kconfig
View file

@ -133,6 +133,18 @@ config MOUSE_PS2_ELANTECH
If unsure, say N.
config MOUSE_PS2_ELANTECH_SMBUS
bool "Elantech PS/2 SMbus companion" if EXPERT
default y
depends on MOUSE_PS2 && MOUSE_PS2_ELANTECH
depends on I2C=y || I2C=MOUSE_PS2
select MOUSE_PS2_SMBUS
help
Say Y here if you have a Elantech touchpad connected to
to an SMBus, but enumerated through PS/2.
If unsure, say Y.
config MOUSE_PS2_SENTELIC
bool "Sentelic Finger Sensing Pad PS/2 protocol extension"
depends on MOUSE_PS2

80
drivers/input/mouse/alps.c
View file

@ -2049,14 +2049,11 @@ static int alps_hw_init_v1_v2(struct psmouse *psmouse)
return 0;
}
static int alps_hw_init_v6(struct psmouse *psmouse)
/* Must be in passthrough mode when calling this function */
static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse)
{
unsigned char param[2] = {0xC8, 0x14};
/* Enter passthrough mode to let trackpoint enter 6byte raw mode */
if (alps_passthrough_mode_v2(psmouse, true))
return -1;
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
@ -2064,9 +2061,25 @@ static int alps_hw_init_v6(struct psmouse *psmouse)
ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
return -1;
return 0;
}
static int alps_hw_init_v6(struct psmouse *psmouse)
{
int ret;
/* Enter passthrough mode to let trackpoint enter 6byte raw mode */
if (alps_passthrough_mode_v2(psmouse, true))
return -1;
ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse);
if (alps_passthrough_mode_v2(psmouse, false))
return -1;
if (ret)
return ret;
if (alps_absolute_mode_v6(psmouse)) {
psmouse_err(psmouse, "Failed to enable absolute mode\n");
return -1;
@ -2140,10 +2153,18 @@ error:
static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
int ret = 0;
int reg_val;
unsigned char param[4];
/*
* We need to configure trackstick to report data for touchpad in
* extended format. And also we need to tell touchpad to expect data
* from trackstick in extended format. Without this configuration
* trackstick packets sent from touchpad are in basic format which is
* different from what we expect.
*/
if (alps_passthrough_mode_v3(psmouse, reg_base, true))
return -EIO;
@ -2161,39 +2182,36 @@ static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
ret = -ENODEV;
} else {
psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
/*
* Not sure what this does, but it is absolutely
* essential. Without it, the touchpad does not
* work at all and the trackstick just emits normal
* PS/2 packets.
*/
if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
alps_command_mode_send_nibble(psmouse, 0x9) ||
alps_command_mode_send_nibble(psmouse, 0x4)) {
psmouse_err(psmouse,
"Error sending magic E6 sequence\n");
if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) {
psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n");
ret = -EIO;
goto error;
}
}
if (alps_passthrough_mode_v3(psmouse, reg_base, false))
return -EIO;
if (ret)
return ret;
if (alps_enter_command_mode(psmouse))
return -EIO;
reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
if (reg_val == -1) {
ret = -EIO;
} else {
/*
* This ensures the trackstick packets are in the format
* supported by this driver. If bit 1 isn't set the packet
* format is different.
* Tell touchpad that trackstick is now in extended mode.
* If bit 1 isn't set the packet format is different.
*/
if (alps_enter_command_mode(psmouse) ||
alps_command_mode_write_reg(psmouse,
reg_base + 0x08, 0x82) ||
alps_exit_command_mode(psmouse))
reg_val |= BIT(1);
if (__alps_command_mode_write_reg(psmouse, reg_val))
ret = -EIO;
}
error:
if (alps_passthrough_mode_v3(psmouse, reg_base, false))
ret = -EIO;
if (alps_exit_command_mode(psmouse))
return -EIO;
return ret;
}

89
drivers/input/mouse/elan_i2c_core.c
View file

@ -36,6 +36,7 @@
#include <linux/jiffies.h>
#include <linux/completion.h>
#include <linux/of.h>
#include <linux/property.h>
#include <linux/regulator/consumer.h>
#include <asm/unaligned.h>
@ -51,6 +52,7 @@
#define ETP_MAX_FINGERS 5
#define ETP_FINGER_DATA_LEN 5
#define ETP_REPORT_ID 0x5D
#define ETP_TP_REPORT_ID 0x5E
#define ETP_REPORT_ID_OFFSET 2
#define ETP_TOUCH_INFO_OFFSET 3
#define ETP_FINGER_DATA_OFFSET 4
@ -61,6 +63,7 @@
struct elan_tp_data {
struct i2c_client *client;
struct input_dev *input;
struct input_dev *tp_input; /* trackpoint input node */
struct regulator *vcc;
const struct elan_transport_ops *ops;
@ -930,6 +933,33 @@ static void elan_report_absolute(struct elan_tp_data *data, u8 *packet)
input_sync(input);
}
static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report)
{
struct input_dev *input = data->tp_input;
u8 *packet = &report[ETP_REPORT_ID_OFFSET + 1];
int x, y;
if (!data->tp_input) {
dev_warn_once(&data->client->dev,
"received a trackpoint report while no trackpoint device has been created. Please report upstream.\n");
return;
}
input_report_key(input, BTN_LEFT, packet[0] & 0x01);
input_report_key(input, BTN_RIGHT, packet[0] & 0x02);
input_report_key(input, BTN_MIDDLE, packet[0] & 0x04);
if ((packet[3] & 0x0F) == 0x06) {
x = packet[4] - (int)((packet[1] ^ 0x80) << 1);
y = (int)((packet[2] ^ 0x80) << 1) - packet[5];
input_report_rel(input, REL_X, x);
input_report_rel(input, REL_Y, y);
}
input_sync(input);
}
static irqreturn_t elan_isr(int irq, void *dev_id)
{
struct elan_tp_data *data = dev_id;
@ -951,11 +981,17 @@ static irqreturn_t elan_isr(int irq, void *dev_id)
if (error)
goto out;
if (report[ETP_REPORT_ID_OFFSET] != ETP_REPORT_ID)
switch (report[ETP_REPORT_ID_OFFSET]) {
case ETP_REPORT_ID:
elan_report_absolute(data, report);
break;
case ETP_TP_REPORT_ID:
elan_report_trackpoint(data, report);
break;
default:
dev_err(dev, "invalid report id data (%x)\n",
report[ETP_REPORT_ID_OFFSET]);
else
elan_report_absolute(data, report);
}
out:
return IRQ_HANDLED;
@ -966,6 +1002,36 @@ out:
* Elan initialization functions
******************************************************************
*/
static int elan_setup_trackpoint_input_device(struct elan_tp_data *data)
{
struct device *dev = &data->client->dev;
struct input_dev *input;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = "Elan TrackPoint";
input->id.bustype = BUS_I2C;
input->id.vendor = ELAN_VENDOR_ID;
input->id.product = data->product_id;
input_set_drvdata(input, data);
input_set_capability(input, EV_REL, REL_X);
input_set_capability(input, EV_REL, REL_Y);
input_set_capability(input, EV_KEY, BTN_LEFT);
input_set_capability(input, EV_KEY, BTN_RIGHT);
input_set_capability(input, EV_KEY, BTN_MIDDLE);
__set_bit(INPUT_PROP_POINTER, input->propbit);
__set_bit(INPUT_PROP_POINTING_STICK, input->propbit);
data->tp_input = input;
return 0;
}
static int elan_setup_input_device(struct elan_tp_data *data)
{
struct device *dev = &data->client->dev;
@ -1140,6 +1206,12 @@ static int elan_probe(struct i2c_client *client,
if (error)
return error;
if (device_property_read_bool(&client->dev, "elan,trackpoint")) {
error = elan_setup_trackpoint_input_device(data);
if (error)
return error;
}
/*
* Platform code (ACPI, DTS) should normally set up interrupt
* for us, but in case it did not let's fall back to using falling
@ -1177,6 +1249,16 @@ static int elan_probe(struct i2c_client *client,
return error;
}
if (data->tp_input) {
error = input_register_device(data->tp_input);
if (error) {
dev_err(&client->dev,
"failed to register TrackPoint input device: %d\n",
error);
return error;
}
}
/*
* Systems using device tree should set up wakeup via DTS,
* the rest will configure device as wakeup source by default.
@ -1262,6 +1344,7 @@ static const struct acpi_device_id elan_acpi_id[] = {
{ "ELAN060B", 0 },
{ "ELAN060C", 0 },
{ "ELAN0611", 0 },
{ "ELAN0612", 0 },
{ "ELAN1000", 0 },
{ }
};

479
drivers/input/mouse/elantech.c
View file

@ -14,17 +14,20 @@
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/platform_device.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <asm/unaligned.h>
#include "psmouse.h"
#include "elantech.h"
#include "elan_i2c.h"
#define elantech_debug(fmt, ...) \
do { \
if (etd->debug) \
if (etd->info.debug) \
psmouse_printk(KERN_DEBUG, psmouse, \
fmt, ##__VA_ARGS__); \
} while (0)
@ -105,7 +108,7 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
if (reg > 0x11 && reg < 0x20)
return -1;
switch (etd->hw_version) {
switch (etd->info.hw_version) {
case 1:
if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_READ) ||
ps2_sliced_command(&psmouse->ps2dev, reg) ||
@ -137,7 +140,7 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg,
if (rc)
psmouse_err(psmouse, "failed to read register 0x%02x.\n", reg);
else if (etd->hw_version != 4)
else if (etd->info.hw_version != 4)
*val = param[0];
else
*val = param[1];
@ -160,7 +163,7 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg,
if (reg > 0x11 && reg < 0x20)
return -1;
switch (etd->hw_version) {
switch (etd->info.hw_version) {
case 1:
if (ps2_sliced_command(&psmouse->ps2dev, ETP_REGISTER_WRITE) ||
ps2_sliced_command(&psmouse->ps2dev, reg) ||
@ -237,7 +240,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
unsigned char *packet = psmouse->packet;
int fingers;
if (etd->fw_version < 0x020000) {
if (etd->info.fw_version < 0x020000) {
/*
* byte 0: D U p1 p2 1 p3 R L
* byte 1: f 0 th tw x9 x8 y9 y8
@ -252,7 +255,7 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
fingers = (packet[0] & 0xc0) >> 6;
}
if (etd->jumpy_cursor) {
if (etd->info.jumpy_cursor) {
if (fingers != 1) {
etd->single_finger_reports = 0;
} else if (etd->single_finger_reports < 2) {
@ -282,8 +285,8 @@ static void elantech_report_absolute_v1(struct psmouse *psmouse)
psmouse_report_standard_buttons(dev, packet[0]);
if (etd->fw_version < 0x020000 &&
(etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
if (etd->info.fw_version < 0x020000 &&
(etd->info.capabilities[0] & ETP_CAP_HAS_ROCKER)) {
/* rocker up */
input_report_key(dev, BTN_FORWARD, packet[0] & 0x40);
/* rocker down */
@ -391,7 +394,7 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse)
input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
psmouse_report_standard_buttons(dev, packet[0]);
if (etd->reports_pressure) {
if (etd->info.reports_pressure) {
input_report_abs(dev, ABS_PRESSURE, pres);
input_report_abs(dev, ABS_TOOL_WIDTH, width);
}
@ -444,7 +447,7 @@ static void elantech_report_trackpoint(struct psmouse *psmouse,
default:
/* Dump unexpected packet sequences if debug=1 (default) */
if (etd->debug == 1)
if (etd->info.debug == 1)
elantech_packet_dump(psmouse);
break;
@ -523,7 +526,7 @@ static void elantech_report_absolute_v3(struct psmouse *psmouse,
input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
/* For clickpads map both buttons to BTN_LEFT */
if (etd->fw_version & 0x001000)
if (etd->info.fw_version & 0x001000)
input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
else
psmouse_report_standard_buttons(dev, packet[0]);
@ -541,7 +544,7 @@ static void elantech_input_sync_v4(struct psmouse *psmouse)
unsigned char *packet = psmouse->packet;
/* For clickpads map both buttons to BTN_LEFT */
if (etd->fw_version & 0x001000)
if (etd->info.fw_version & 0x001000)
input_report_key(dev, BTN_LEFT, packet[0] & 0x03);
else
psmouse_report_standard_buttons(dev, packet[0]);
@ -669,7 +672,7 @@ static int elantech_packet_check_v1(struct psmouse *psmouse)
unsigned char p1, p2, p3;
/* Parity bits are placed differently */
if (etd->fw_version < 0x020000) {
if (etd->info.fw_version < 0x020000) {
/* byte 0: D U p1 p2 1 p3 R L */
p1 = (packet[0] & 0x20) >> 5;
p2 = (packet[0] & 0x10) >> 4;
@ -714,7 +717,7 @@ static int elantech_packet_check_v2(struct psmouse *psmouse)
* With all three cases, if the constant bits are not exactly what I
* expected, I consider them invalid.
*/
if (etd->reports_pressure)
if (etd->info.reports_pressure)
return (packet[0] & 0x0c) == 0x04 &&
(packet[3] & 0x0f) == 0x02;
@ -751,7 +754,7 @@ static int elantech_packet_check_v3(struct psmouse *psmouse)
* If the hardware flag 'crc_enabled' is set the packets have
* different signatures.
*/
if (etd->crc_enabled) {
if (etd->info.crc_enabled) {
if ((packet[3] & 0x09) == 0x08)
return PACKET_V3_HEAD;
@ -782,7 +785,7 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
return PACKET_TRACKPOINT;
/* This represents the version of IC body. */
ic_version = (etd->fw_version & 0x0f0000) >> 16;
ic_version = (etd->info.fw_version & 0x0f0000) >> 16;
/*
* Sanity check based on the constant bits of a packet.
@ -791,9 +794,9 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
* the IC body, but are the same for every packet,
* regardless of the type.
*/
if (etd->crc_enabled)
if (etd->info.crc_enabled)
sanity_check = ((packet[3] & 0x08) == 0x00);
else if (ic_version == 7 && etd->samples[1] == 0x2A)
else if (ic_version == 7 && etd->info.samples[1] == 0x2A)
sanity_check = ((packet[3] & 0x1c) == 0x10);
else
sanity_check = ((packet[0] & 0x0c) == 0x04 &&
@ -827,12 +830,12 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
if (psmouse->pktcnt < psmouse->pktsize)
return PSMOUSE_GOOD_DATA;
if (etd->debug > 1)
if (etd->info.debug > 1)
elantech_packet_dump(psmouse);
switch (etd->hw_version) {
switch (etd->info.hw_version) {
case 1:
if (etd->paritycheck && !elantech_packet_check_v1(psmouse))
if (etd->info.paritycheck && !elantech_packet_check_v1(psmouse))
return PSMOUSE_BAD_DATA;
elantech_report_absolute_v1(psmouse);
@ -843,7 +846,7 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
if (elantech_debounce_check_v2(psmouse))
return PSMOUSE_FULL_PACKET;
if (etd->paritycheck && !elantech_packet_check_v2(psmouse))
if (etd->info.paritycheck && !elantech_packet_check_v2(psmouse))
return PSMOUSE_BAD_DATA;
elantech_report_absolute_v2(psmouse);
@ -916,7 +919,7 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
int tries = ETP_READ_BACK_TRIES;
int rc = 0;
switch (etd->hw_version) {
switch (etd->info.hw_version) {
case 1:
etd->reg_10 = 0x16;
etd->reg_11 = 0x8f;
@ -939,7 +942,7 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
break;
case 3:
if (etd->set_hw_resolution)
if (etd->info.set_hw_resolution)
etd->reg_10 = 0x0b;
else
etd->reg_10 = 0x01;
@ -976,7 +979,7 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse)
if (rc) {
psmouse_err(psmouse,
"failed to read back register 0x10.\n");
} else if (etd->hw_version == 1 &&
} else if (etd->info.hw_version == 1 &&
!(val & ETP_R10_ABSOLUTE_MODE)) {
psmouse_err(psmouse,
"touchpad refuses to switch to absolute mode.\n");
@ -997,10 +1000,11 @@ static int elantech_set_range(struct psmouse *psmouse,
unsigned int *width)
{
struct elantech_data *etd = psmouse->private;
struct elantech_device_info *info = &etd->info;
unsigned char param[3];
unsigned char traces;
switch (etd->hw_version) {
switch (info->hw_version) {
case 1:
*x_min = ETP_XMIN_V1;
*y_min = ETP_YMIN_V1;
@ -1009,9 +1013,9 @@ static int elantech_set_range(struct psmouse *psmouse,
break;
case 2:
if (etd->fw_version == 0x020800 ||
etd->fw_version == 0x020b00 ||
etd->fw_version == 0x020030) {
if (info->fw_version == 0x020800 ||
info->fw_version == 0x020b00 ||
info->fw_version == 0x020030) {
*x_min = ETP_XMIN_V2;
*y_min = ETP_YMIN_V2;
*x_max = ETP_XMAX_V2;
@ -1020,35 +1024,35 @@ static int elantech_set_range(struct psmouse *psmouse,
int i;
int fixed_dpi;
i = (etd->fw_version > 0x020800 &&
etd->fw_version < 0x020900) ? 1 : 2;
i = (info->fw_version > 0x020800 &&
info->fw_version < 0x020900) ? 1 : 2;
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
fixed_dpi = param[1] & 0x10;
if (((etd->fw_version >> 16) == 0x14) && fixed_dpi) {
if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
if (((info->fw_version >> 16) == 0x14) && fixed_dpi) {
if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, param))
return -1;
*x_max = (etd->capabilities[1] - i) * param[1] / 2;
*y_max = (etd->capabilities[2] - i) * param[2] / 2;
} else if (etd->fw_version == 0x040216) {
*x_max = (info->capabilities[1] - i) * param[1] / 2;
*y_max = (info->capabilities[2] - i) * param[2] / 2;
} else if (info->fw_version == 0x040216) {
*x_max = 819;
*y_max = 405;
} else if (etd->fw_version == 0x040219 || etd->fw_version == 0x040215) {
} else if (info->fw_version == 0x040219 || info->fw_version == 0x040215) {
*x_max = 900;
*y_max = 500;
} else {
*x_max = (etd->capabilities[1] - i) * 64;
*y_max = (etd->capabilities[2] - i) * 64;
*x_max = (info->capabilities[1] - i) * 64;
*y_max = (info->capabilities[2] - i) * 64;
}
}
break;
case 3:
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
*x_max = (0x0f & param[0]) << 8 | param[1];
@ -1056,12 +1060,12 @@ static int elantech_set_range(struct psmouse *psmouse,
break;
case 4:
if (etd->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
if (info->send_cmd(psmouse, ETP_FW_ID_QUERY, param))
return -1;
*x_max = (0x0f & param[0]) << 8 | param[1];
*y_max = (0xf0 & param[0]) << 4 | param[2];
traces = etd->capabilities[1];
traces = info->capabilities[1];
if ((traces < 2) || (traces > *x_max))
return -1;
@ -1083,7 +1087,8 @@ static unsigned int elantech_convert_res(unsigned int val)
static int elantech_get_resolution_v4(struct psmouse *psmouse,
unsigned int *x_res,
unsigned int *y_res)
unsigned int *y_res,
unsigned int *bus)
{
unsigned char param[3];
@ -1092,6 +1097,7 @@ static int elantech_get_resolution_v4(struct psmouse *psmouse,
*x_res = elantech_convert_res(param[1] & 0x0f);
*y_res = elantech_convert_res((param[1] & 0xf0) >> 4);
*bus = param[2];
return 0;
}
@ -1140,7 +1146,7 @@ static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
if (etd->fw_version & 0x001000) {
if (etd->info.fw_version & 0x001000) {
__set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
__clear_bit(BTN_RIGHT, dev->keybit);
}
@ -1176,8 +1182,8 @@ static int elantech_set_input_params(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
struct elantech_data *etd = psmouse->private;
struct elantech_device_info *info = &etd->info;
unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0, width = 0;
unsigned int x_res = 31, y_res = 31;
if (elantech_set_range(psmouse, &x_min, &y_min, &x_max, &y_max, &width))
return -1;
@ -1197,11 +1203,11 @@ static int elantech_set_input_params(struct psmouse *psmouse)
__set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
__set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
switch (etd->hw_version) {
switch (info->hw_version) {
case 1:
/* Rocker button */
if (etd->fw_version < 0x020000 &&
(etd->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
if (info->fw_version < 0x020000 &&
(info->capabilities[0] & ETP_CAP_HAS_ROCKER)) {
__set_bit(BTN_FORWARD, dev->keybit);
__set_bit(BTN_BACK, dev->keybit);
}
@ -1214,11 +1220,11 @@ static int elantech_set_input_params(struct psmouse *psmouse)
__set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
/* fall through */
case 3:
if (etd->hw_version == 3)
if (info->hw_version == 3)
elantech_set_buttonpad_prop(psmouse);
input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0);
input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0);
if (etd->reports_pressure) {
if (info->reports_pressure) {
input_set_abs_params(dev, ABS_PRESSURE, ETP_PMIN_V2,
ETP_PMAX_V2, 0, 0);
input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2,
@ -1230,13 +1236,6 @@ static int elantech_set_input_params(struct psmouse *psmouse)
break;
case 4:
if (elantech_get_resolution_v4(psmouse, &x_res, &y_res)) {
/*
* if query failed, print a warning and leave the values
* zero to resemble synaptics.c behavior.
*/
psmouse_warn(psmouse, "couldn't query resolution data.\n");
}
elantech_set_buttonpad_prop(psmouse);
__set_bit(BTN_TOOL_QUADTAP, dev->keybit);
/* For X to recognize me as touchpad. */
@ -1265,11 +1264,11 @@ static int elantech_set_input_params(struct psmouse *psmouse)
break;
}
input_abs_set_res(dev, ABS_X, x_res);
input_abs_set_res(dev, ABS_Y, y_res);
if (etd->hw_version > 1) {
input_abs_set_res(dev, ABS_MT_POSITION_X, x_res);
input_abs_set_res(dev, ABS_MT_POSITION_Y, y_res);
input_abs_set_res(dev, ABS_X, info->x_res);
input_abs_set_res(dev, ABS_Y, info->y_res);
if (info->hw_version > 1) {
input_abs_set_res(dev, ABS_MT_POSITION_X, info->x_res);
input_abs_set_res(dev, ABS_MT_POSITION_Y, info->y_res);
}
etd->y_max = y_max;
@ -1317,7 +1316,7 @@ static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
return err;
/* Do we need to preserve some bits for version 2 hardware too? */
if (etd->hw_version == 1) {
if (etd->info.hw_version == 1) {
if (attr->reg == 0x10)
/* Force absolute mode always on */
value |= ETP_R10_ABSOLUTE_MODE;
@ -1337,11 +1336,22 @@ static ssize_t elantech_set_int_attr(struct psmouse *psmouse,
.field_offset = offsetof(struct elantech_data, _name), \
.reg = _register, \
}; \
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
PSMOUSE_DEFINE_ATTR(_name, 0644, \
&elantech_attr_##_name, \
elantech_show_int_attr, \
elantech_set_int_attr)
#define ELANTECH_INFO_ATTR(_name) \
static struct elantech_attr_data elantech_attr_##_name = { \
.field_offset = offsetof(struct elantech_data, info) + \
offsetof(struct elantech_device_info, _name), \
.reg = 0, \
}; \
PSMOUSE_DEFINE_ATTR(_name, 0644, \
&elantech_attr_##_name, \
elantech_show_int_attr, \
elantech_set_int_attr)
ELANTECH_INT_ATTR(reg_07, 0x07);
ELANTECH_INT_ATTR(reg_10, 0x10);
ELANTECH_INT_ATTR(reg_11, 0x11);
@ -1352,9 +1362,9 @@ ELANTECH_INT_ATTR(reg_23, 0x23);
ELANTECH_INT_ATTR(reg_24, 0x24);
ELANTECH_INT_ATTR(reg_25, 0x25);
ELANTECH_INT_ATTR(reg_26, 0x26);
ELANTECH_INT_ATTR(debug, 0);
ELANTECH_INT_ATTR(paritycheck, 0);
ELANTECH_INT_ATTR(crc_enabled, 0);
ELANTECH_INFO_ATTR(debug);
ELANTECH_INFO_ATTR(paritycheck);
ELANTECH_INFO_ATTR(crc_enabled);
static struct attribute *elantech_attrs[] = {
&psmouse_attr_reg_07.dattr.attr,
@ -1469,6 +1479,12 @@ static void elantech_disconnect(struct psmouse *psmouse)
{
struct elantech_data *etd = psmouse->private;
/*
* We might have left a breadcrumb when trying to
* set up SMbus companion.
*/
psmouse_smbus_cleanup(psmouse);
if (etd->tp_dev)
input_unregister_device(etd->tp_dev);
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
@ -1588,25 +1604,25 @@ static const struct dmi_system_id no_hw_res_dmi_table[] = {
/*
* determine hardware version and set some properties according to it.
*/
static int elantech_set_properties(struct elantech_data *etd)
static int elantech_set_properties(struct elantech_device_info *info)
{
/* This represents the version of IC body. */
int ver = (etd->fw_version & 0x0f0000) >> 16;
int ver = (info->fw_version & 0x0f0000) >> 16;
/* Early version of Elan touchpads doesn't obey the rule. */
if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600)
etd->hw_version = 1;
if (info->fw_version < 0x020030 || info->fw_version == 0x020600)
info->hw_version = 1;
else {
switch (ver) {
case 2:
case 4:
etd->hw_version = 2;
info->hw_version = 2;
break;
case 5:
etd->hw_version = 3;
info->hw_version = 3;
break;
case 6 ... 15:
etd->hw_version = 4;
info->hw_version = 4;
break;
default:
return -1;
@ -1614,100 +1630,88 @@ static int elantech_set_properties(struct elantech_data *etd)
}
/* decide which send_cmd we're gonna use early */
etd->send_cmd = etd->hw_version >= 3 ? elantech_send_cmd :
synaptics_send_cmd;
info->send_cmd = info->hw_version >= 3 ? elantech_send_cmd :
synaptics_send_cmd;
/* Turn on packet checking by default */
etd->paritycheck = 1;
info->paritycheck = 1;
/*
* This firmware suffers from misreporting coordinates when
* a touch action starts causing the mouse cursor or scrolled page
* to jump. Enable a workaround.
*/
etd->jumpy_cursor =
(etd->fw_version == 0x020022 || etd->fw_version == 0x020600);
info->jumpy_cursor =
(info->fw_version == 0x020022 || info->fw_version == 0x020600);
if (etd->hw_version > 1) {
if (info->hw_version > 1) {
/* For now show extra debug information */
etd->debug = 1;
info->debug = 1;
if (etd->fw_version >= 0x020800)
etd->reports_pressure = true;
if (info->fw_version >= 0x020800)
info->reports_pressure = true;
}
/*
* The signatures of v3 and v4 packets change depending on the
* value of this hardware flag.
*/
etd->crc_enabled = (etd->fw_version & 0x4000) == 0x4000 ||
dmi_check_system(elantech_dmi_force_crc_enabled);
info->crc_enabled = (info->fw_version & 0x4000) == 0x4000 ||
dmi_check_system(elantech_dmi_force_crc_enabled);
/* Enable real hardware resolution on hw_version 3 ? */
etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
info->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
return 0;
}
/*
* Initialize the touchpad and create sysfs entries
*/
int elantech_init(struct psmouse *psmouse)
static int elantech_query_info(struct psmouse *psmouse,
struct elantech_device_info *info)
{
struct elantech_data *etd;
int i;
int error = -EINVAL;
unsigned char param[3];
struct input_dev *tp_dev;
psmouse->private = etd = kzalloc(sizeof(struct elantech_data), GFP_KERNEL);
if (!etd)
return -ENOMEM;
psmouse_reset(psmouse);
etd->parity[0] = 1;
for (i = 1; i < 256; i++)
etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
memset(info, 0, sizeof(*info));
/*
* Do the version query again so we can store the result
*/
if (synaptics_send_cmd(psmouse, ETP_FW_VERSION_QUERY, param)) {
psmouse_err(psmouse, "failed to query firmware version.\n");
goto init_fail;
return -EINVAL;
}
etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
info->fw_version = (param[0] << 16) | (param[1] << 8) | param[2];
if (elantech_set_properties(etd)) {
if (elantech_set_properties(info)) {
psmouse_err(psmouse, "unknown hardware version, aborting...\n");
goto init_fail;
return -EINVAL;
}
psmouse_info(psmouse,
"assuming hardware version %d (with firmware version 0x%02x%02x%02x)\n",
etd->hw_version, param[0], param[1], param[2]);
info->hw_version, param[0], param[1], param[2]);
if (etd->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
etd->capabilities)) {
if (info->send_cmd(psmouse, ETP_CAPABILITIES_QUERY,
info->capabilities)) {
psmouse_err(psmouse, "failed to query capabilities.\n");
goto init_fail;
return -EINVAL;
}
psmouse_info(psmouse,
"Synaptics capabilities query result 0x%02x, 0x%02x, 0x%02x.\n",
etd->capabilities[0], etd->capabilities[1],
etd->capabilities[2]);
info->capabilities[0], info->capabilities[1],
info->capabilities[2]);
if (etd->hw_version != 1) {
if (etd->send_cmd(psmouse, ETP_SAMPLE_QUERY, etd->samples)) {
if (info->hw_version != 1) {
if (info->send_cmd(psmouse, ETP_SAMPLE_QUERY, info->samples)) {
psmouse_err(psmouse, "failed to query sample data\n");
goto init_fail;
return -EINVAL;
}
psmouse_info(psmouse,
"Elan sample query result %02x, %02x, %02x\n",
etd->samples[0], etd->samples[1], etd->samples[2]);
info->samples[0],
info->samples[1],
info->samples[2]);
}
if (etd->samples[1] == 0x74 && etd->hw_version == 0x03) {
if (info->samples[1] == 0x74 && info->hw_version == 0x03) {
/*
* This module has a bug which makes absolute mode
* unusable, so let's abort so we'll be using standard
@ -1715,16 +1719,181 @@ int elantech_init(struct psmouse *psmouse)
*/
psmouse_info(psmouse,
"absolute mode broken, forcing standard PS/2 protocol\n");
return -ENODEV;
}
/* The MSB indicates the presence of the trackpoint */
info->has_trackpoint = (info->capabilities[0] & 0x80) == 0x80;
info->x_res = 31;
info->y_res = 31;
if (info->hw_version == 4) {
if (elantech_get_resolution_v4(psmouse,
&info->x_res,
&info->y_res,
&info->bus)) {
psmouse_warn(psmouse,
"failed to query resolution data.\n");
}
}
return 0;
}
#if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
/*
* The newest Elantech device can use a secondary bus (over SMBus) which
* provides a better bandwidth and allow a better control of the touchpads.
* This is used to decide if we need to use this bus or not.
*/
enum {
ELANTECH_SMBUS_NOT_SET = -1,
ELANTECH_SMBUS_OFF,
ELANTECH_SMBUS_ON,
};
static int elantech_smbus = IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ?
ELANTECH_SMBUS_NOT_SET : ELANTECH_SMBUS_OFF;
module_param_named(elantech_smbus, elantech_smbus, int, 0644);
MODULE_PARM_DESC(elantech_smbus, "Use a secondary bus for the Elantech device.");
static int elantech_create_smbus(struct psmouse *psmouse,
struct elantech_device_info *info,
bool leave_breadcrumbs)
{
const struct property_entry i2c_properties[] = {
PROPERTY_ENTRY_BOOL("elan,trackpoint"),
{ },
};
struct i2c_board_info smbus_board = {
I2C_BOARD_INFO("elan_i2c", 0x15),
.flags = I2C_CLIENT_HOST_NOTIFY,
};
if (info->has_trackpoint)
smbus_board.properties = i2c_properties;
return psmouse_smbus_init(psmouse, &smbus_board, NULL, 0, false,
leave_breadcrumbs);
}
/**
* elantech_setup_smbus - called once the PS/2 devices are enumerated
* and decides to instantiate a SMBus InterTouch device.
*/
static int elantech_setup_smbus(struct psmouse *psmouse,
struct elantech_device_info *info,
bool leave_breadcrumbs)
{
int error;
if (elantech_smbus == ELANTECH_SMBUS_OFF)
return -ENXIO;
if (elantech_smbus == ELANTECH_SMBUS_NOT_SET) {
/*
* New ICs are enabled by default.
* Old ICs are up to the user to decide.
*/
if (!ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version))
return -ENXIO;
}
psmouse_info(psmouse, "Trying to set up SMBus access\n");
error = elantech_create_smbus(psmouse, info, leave_breadcrumbs);
if (error) {
if (error == -EAGAIN)
psmouse_info(psmouse, "SMbus companion is not ready yet\n");
else
psmouse_err(psmouse, "unable to create intertouch device\n");
return error;
}
return 0;
}
static bool elantech_use_host_notify(struct psmouse *psmouse,
struct elantech_device_info *info)
{
if (ETP_NEW_IC_SMBUS_HOST_NOTIFY(info->fw_version))
return true;
switch (info->bus) {
case ETP_BUS_PS2_ONLY:
/* expected case */
break;
case ETP_BUS_SMB_ALERT_ONLY:
/* fall-through */
case ETP_BUS_PS2_SMB_ALERT:
psmouse_dbg(psmouse, "Ignoring SMBus provider through alert protocol.\n");
break;
case ETP_BUS_SMB_HST_NTFY_ONLY:
/* fall-through */
case ETP_BUS_PS2_SMB_HST_NTFY:
return true;
default:
psmouse_dbg(psmouse,
"Ignoring SMBus bus provider %d.\n",
info->bus);
}
return false;
}
int elantech_init_smbus(struct psmouse *psmouse)
{
struct elantech_device_info info;
int error = -EINVAL;
psmouse_reset(psmouse);
error = elantech_query_info(psmouse, &info);
if (error)
goto init_fail;
if (info.hw_version < 4) {
error = -ENXIO;
goto init_fail;
}
return elantech_create_smbus(psmouse, &info, false);
init_fail:
psmouse_reset(psmouse);
return error;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
/*
* Initialize the touchpad and create sysfs entries
*/
static int elantech_setup_ps2(struct psmouse *psmouse,
struct elantech_device_info *info)
{
struct elantech_data *etd;
int i;
int error = -EINVAL;
struct input_dev *tp_dev;
psmouse->private = etd = kzalloc(sizeof(*etd), GFP_KERNEL);
if (!etd)
return -ENOMEM;
etd->info = *info;
etd->parity[0] = 1;
for (i = 1; i < 256; i++)
etd->parity[i] = etd->parity[i & (i - 1)] ^ 1;
if (elantech_set_absolute_mode(psmouse)) {
psmouse_err(psmouse,
"failed to put touchpad into absolute mode.\n");
goto init_fail;
}
if (etd->fw_version == 0x381f17) {
if (info->fw_version == 0x381f17) {
etd->original_set_rate = psmouse->set_rate;
psmouse->set_rate = elantech_set_rate_restore_reg_07;
}
@ -1743,8 +1912,7 @@ int elantech_init(struct psmouse *psmouse)
goto init_fail;
}
/* The MSB indicates the presence of the trackpoint */
if ((etd->capabilities[0] & 0x80) == 0x80) {
if (info->has_trackpoint) {
tp_dev = input_allocate_device();
if (!tp_dev) {
@ -1780,7 +1948,7 @@ int elantech_init(struct psmouse *psmouse)
psmouse->protocol_handler = elantech_process_byte;
psmouse->disconnect = elantech_disconnect;
psmouse->reconnect = elantech_reconnect;
psmouse->pktsize = etd->hw_version > 1 ? 6 : 4;
psmouse->pktsize = info->hw_version > 1 ? 6 : 4;
return 0;
init_fail_tp_reg:
@ -1789,7 +1957,70 @@ int elantech_init(struct psmouse *psmouse)
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj,
&elantech_attr_group);
init_fail:
psmouse_reset(psmouse);
kfree(etd);
return error;
}
int elantech_init_ps2(struct psmouse *psmouse)
{
struct elantech_device_info info;
int error = -EINVAL;
psmouse_reset(psmouse);
error = elantech_query_info(psmouse, &info);
if (error)
goto init_fail;
error = elantech_setup_ps2(psmouse, &info);
if (error)
goto init_fail;
return 0;
init_fail:
psmouse_reset(psmouse);
return error;
}
int elantech_init(struct psmouse *psmouse)
{
struct elantech_device_info info;
int error = -EINVAL;
psmouse_reset(psmouse);
error = elantech_query_info(psmouse, &info);
if (error)
goto init_fail;
#if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
if (elantech_use_host_notify(psmouse, &info)) {
if (!IS_ENABLED(CONFIG_MOUSE_ELAN_I2C_SMBUS) ||
!IS_ENABLED(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)) {
psmouse_warn(psmouse,
"The touchpad can support a better bus than the too old PS/2 protocol. "
"Make sure MOUSE_PS2_ELANTECH_SMBUS and MOUSE_ELAN_I2C_SMBUS are enabled to get a better touchpad experience.\n");
}
error = elantech_setup_smbus(psmouse, &info, true);
if (!error)
return PSMOUSE_ELANTECH_SMBUS;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
error = elantech_setup_ps2(psmouse, &info);
if (error < 0) {
/*
* Not using any flavor of Elantech support, so clean up
* SMbus breadcrumbs, if any.
*/
psmouse_smbus_cleanup(psmouse);
goto init_fail;
}
return PSMOUSE_ELANTECH;
init_fail:
psmouse_reset(psmouse);
return error;
}

69
drivers/input/mouse/elantech.h
View file

@ -106,6 +106,30 @@
*/
#define ETP_WEIGHT_VALUE 5
/*
* Bus information on 3rd byte of query ETP_RESOLUTION_QUERY(0x04)
*/
#define ETP_BUS_PS2_ONLY 0
#define ETP_BUS_SMB_ALERT_ONLY 1
#define ETP_BUS_SMB_HST_NTFY_ONLY 2
#define ETP_BUS_PS2_SMB_ALERT 3
#define ETP_BUS_PS2_SMB_HST_NTFY 4
/*
* New ICs are either using SMBus Host Notify or just plain PS2.
*
* ETP_FW_VERSION_QUERY is:
* Byte 1:
* - bit 0..3: IC BODY
* Byte 2:
* - bit 4: HiddenButton
* - bit 5: PS2_SMBUS_NOTIFY
* - bit 6: PS2CRCCheck
*/
#define ETP_NEW_IC_SMBUS_HOST_NOTIFY(fw_version) \
((((fw_version) & 0x0f2000) == 0x0f2000) && \
((fw_version) & 0x0000ff) > 0)
/*
* The base position for one finger, v4 hardware
*/
@ -114,6 +138,25 @@ struct finger_pos {
unsigned int y;
};
struct elantech_device_info {
unsigned char capabilities[3];
unsigned char samples[3];
unsigned char debug;
unsigned char hw_version;
unsigned int fw_version;
unsigned int x_res;
unsigned int y_res;
unsigned int bus;
bool paritycheck;
bool jumpy_cursor;
bool reports_pressure;
bool crc_enabled;
bool set_hw_resolution;
bool has_trackpoint;
int (*send_cmd)(struct psmouse *psmouse, unsigned char c,
unsigned char *param);
};
struct elantech_data {
struct input_dev *tp_dev; /* Relative device for trackpoint */
char tp_phys[32];
@ -127,27 +170,18 @@ struct elantech_data {
unsigned char reg_24;
unsigned char reg_25;
unsigned char reg_26;
unsigned char debug;
unsigned char capabilities[3];
unsigned char samples[3];
bool paritycheck;
bool jumpy_cursor;
bool reports_pressure;
bool crc_enabled;
bool set_hw_resolution;
unsigned char hw_version;
unsigned int fw_version;
unsigned int single_finger_reports;
unsigned int y_max;
unsigned int width;
struct finger_pos mt[ETP_MAX_FINGERS];
unsigned char parity[256];
int (*send_cmd)(struct psmouse *psmouse, unsigned char c, unsigned char *param);
struct elantech_device_info info;
void (*original_set_rate)(struct psmouse *psmouse, unsigned int rate);
};
#ifdef CONFIG_MOUSE_PS2_ELANTECH
int elantech_detect(struct psmouse *psmouse, bool set_properties);
int elantech_init_ps2(struct psmouse *psmouse);
int elantech_init(struct psmouse *psmouse);
#else
static inline int elantech_detect(struct psmouse *psmouse, bool set_properties)
@ -158,6 +192,19 @@ static inline int elantech_init(struct psmouse *psmouse)
{
return -ENOSYS;
}
static inline int elantech_init_ps2(struct psmouse *psmouse)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH */
#if defined(CONFIG_MOUSE_PS2_ELANTECH_SMBUS)
int elantech_init_smbus(struct psmouse *psmouse);
#else
static inline int elantech_init_smbus(struct psmouse *psmouse)
{
return -ENOSYS;
}
#endif /* CONFIG_MOUSE_PS2_ELANTECH_SMBUS */
#endif

21
drivers/input/mouse/psmouse-base.c
View file

@ -856,7 +856,17 @@ static const struct psmouse_protocol psmouse_protocols[] = {
.name = "ETPS/2",
.alias = "elantech",
.detect = elantech_detect,
.init = elantech_init,
.init = elantech_init_ps2,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
{
.type = PSMOUSE_ELANTECH_SMBUS,
.name = "ETSMBus",
.alias = "elantech-smbus",
.detect = elantech_detect,
.init = elantech_init_smbus,
.smbus_companion = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_SENTELIC
@ -1158,8 +1168,13 @@ static int psmouse_extensions(struct psmouse *psmouse,
/* Try Elantech touchpad */
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
&max_proto, set_properties, true)) {
return PSMOUSE_ELANTECH;
&max_proto, set_properties, false)) {
if (!set_properties)
return PSMOUSE_ELANTECH;
ret = elantech_init(psmouse);
if (ret >= 0)
return ret;
}
if (max_proto > PSMOUSE_IMEX) {

24
drivers/input/mouse/psmouse-smbus.c
View file

@ -23,6 +23,7 @@ struct psmouse_smbus_dev {
struct i2c_client *client;
struct list_head node;
bool dead;
bool need_deactivate;
};
static LIST_HEAD(psmouse_smbus_list);
@ -118,7 +119,10 @@ static psmouse_ret_t psmouse_smbus_process_byte(struct psmouse *psmouse)
static int psmouse_smbus_reconnect(struct psmouse *psmouse)
{
psmouse_deactivate(psmouse);
struct psmouse_smbus_dev *smbdev = psmouse->private;
if (smbdev->need_deactivate)
psmouse_deactivate(psmouse);
return 0;
}
@ -225,6 +229,7 @@ void psmouse_smbus_cleanup(struct psmouse *psmouse)
int psmouse_smbus_init(struct psmouse *psmouse,
const struct i2c_board_info *board,
const void *pdata, size_t pdata_size,
bool need_deactivate,
bool leave_breadcrumbs)
{
struct psmouse_smbus_dev *smbdev;
@ -236,13 +241,20 @@ int psmouse_smbus_init(struct psmouse *psmouse,
smbdev->psmouse = psmouse;
smbdev->board = *board;
smbdev->need_deactivate = need_deactivate;
smbdev->board.platform_data = kmemdup(pdata, pdata_size, GFP_KERNEL);
if (!smbdev->board.platform_data) {
kfree(smbdev);
return -ENOMEM;
if (pdata) {
smbdev->board.platform_data = kmemdup(pdata, pdata_size,
GFP_KERNEL);
if (!smbdev->board.platform_data) {
kfree(smbdev);
return -ENOMEM;
}
}
if (need_deactivate)
psmouse_deactivate(psmouse);
psmouse->private = smbdev;
psmouse->protocol_handler = psmouse_smbus_process_byte;
psmouse->reconnect = psmouse_smbus_reconnect;
@ -250,8 +262,6 @@ int psmouse_smbus_init(struct psmouse *psmouse,
psmouse->disconnect = psmouse_smbus_disconnect;
psmouse->resync_time = 0;
psmouse_deactivate(psmouse);
mutex_lock(&psmouse_smbus_mutex);
list_add_tail(&smbdev->node, &psmouse_smbus_list);
mutex_unlock(&psmouse_smbus_mutex);

2
drivers/input/mouse/psmouse.h
View file

@ -68,6 +68,7 @@ enum psmouse_type {
PSMOUSE_VMMOUSE,
PSMOUSE_BYD,
PSMOUSE_SYNAPTICS_SMBUS,
PSMOUSE_ELANTECH_SMBUS,
PSMOUSE_AUTO /* This one should always be last */
};
@ -224,6 +225,7 @@ struct i2c_board_info;
int psmouse_smbus_init(struct psmouse *psmouse,
const struct i2c_board_info *board,
const void *pdata, size_t pdata_size,
bool need_deactivate,
bool leave_breadcrumbs);
void psmouse_smbus_cleanup(struct psmouse *psmouse);

2
drivers/input/mouse/synaptics.c
View file

@ -1754,7 +1754,7 @@ static int synaptics_create_intertouch(struct psmouse *psmouse,
};
return psmouse_smbus_init(psmouse, &intertouch_board,
&pdata, sizeof(pdata),
&pdata, sizeof(pdata), true,
leave_breadcrumbs);
}

11
drivers/input/touchscreen/Kconfig
View file

@ -164,6 +164,17 @@ config TOUCHSCREEN_CHIPONE_ICN8318
To compile this driver as a module, choose M here: the
module will be called chipone_icn8318.
config TOUCHSCREEN_CHIPONE_ICN8505
tristate "chipone icn8505 touchscreen controller"
depends on I2C && ACPI
help
Say Y here if you have a ChipOne icn8505 based I2C touchscreen.
If unsure, say N.
To compile this driver as a module, choose M here: the
module will be called chipone_icn8505.
config TOUCHSCREEN_CY8CTMG110
tristate "cy8ctmg110 touchscreen"
depends on I2C

1
drivers/input/touchscreen/Makefile
View file

@ -19,6 +19,7 @@ obj-$(CONFIG_TOUCHSCREEN_ATMEL_MXT) += atmel_mxt_ts.o
obj-$(CONFIG_TOUCHSCREEN_AUO_PIXCIR) += auo-pixcir-ts.o
obj-$(CONFIG_TOUCHSCREEN_BU21013) += bu21013_ts.o
obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8318) += chipone_icn8318.o
obj-$(CONFIG_TOUCHSCREEN_CHIPONE_ICN8505) += chipone_icn8505.o
obj-$(CONFIG_TOUCHSCREEN_CY8CTMG110) += cy8ctmg110_ts.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_CORE) += cyttsp_core.o
obj-$(CONFIG_TOUCHSCREEN_CYTTSP_I2C) += cyttsp_i2c.o cyttsp_i2c_common.o

174
drivers/input/touchscreen/atmel_mxt_ts.c
View file

@ -194,6 +194,8 @@ enum t100_type {
/* Delay times */
#define MXT_BACKUP_TIME 50 /* msec */
#define MXT_RESET_GPIO_TIME 20 /* msec */
#define MXT_RESET_INVALID_CHG 100 /* msec */
#define MXT_RESET_TIME 200 /* msec */
#define MXT_RESET_TIMEOUT 3000 /* msec */
#define MXT_CRC_TIMEOUT 1000 /* msec */
@ -1208,7 +1210,7 @@ static int mxt_soft_reset(struct mxt_data *data)
return ret;
/* Ignore CHG line for 100ms after reset */
msleep(100);
msleep(MXT_RESET_INVALID_CHG);
mxt_acquire_irq(data);
@ -2999,142 +3001,6 @@ static int mxt_parse_device_properties(struct mxt_data *data)
return 0;
}
#ifdef CONFIG_ACPI
struct mxt_acpi_platform_data {
const char *hid;
const struct property_entry *props;
};
static unsigned int samus_touchpad_buttons[] = {
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
BTN_LEFT
};
static const struct property_entry samus_touchpad_props[] = {
PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons),
{ }
};
static struct mxt_acpi_platform_data samus_platform_data[] = {
{
/* Touchpad */
.hid = "ATML0000",
.props = samus_touchpad_props,
},
{
/* Touchscreen */
.hid = "ATML0001",
},
{ }
};
static unsigned int chromebook_tp_buttons[] = {
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
KEY_RESERVED,
BTN_LEFT
};
static const struct property_entry chromebook_tp_props[] = {
PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_tp_buttons),
{ }
};
static struct mxt_acpi_platform_data chromebook_platform_data[] = {
{
/* Touchpad */
.hid = "ATML0000",
.props = chromebook_tp_props,
},
{
/* Touchscreen */
.hid = "ATML0001",
},
{ }
};
static const struct dmi_system_id mxt_dmi_table[] = {
{
/* 2015 Google Pixel */
.ident = "Chromebook Pixel 2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
},
.driver_data = samus_platform_data,
},
{
/* Samsung Chromebook Pro */
.ident = "Samsung Chromebook Pro",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Google"),
DMI_MATCH(DMI_PRODUCT_NAME, "Caroline"),
},
.driver_data = samus_platform_data,
},
{
/* Other Google Chromebooks */
.ident = "Chromebook",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
},
.driver_data = chromebook_platform_data,
},
{ }
};
static int mxt_prepare_acpi_properties(struct i2c_client *client)
{
struct acpi_device *adev;
const struct dmi_system_id *system_id;
const struct mxt_acpi_platform_data *acpi_pdata;
adev = ACPI_COMPANION(&client->dev);
if (!adev)
return -ENOENT;
system_id = dmi_first_match(mxt_dmi_table);
if (!system_id)
return -ENOENT;
acpi_pdata = system_id->driver_data;
if (!acpi_pdata)
return -ENOENT;
while (acpi_pdata->hid) {
if (!strcmp(acpi_device_hid(adev), acpi_pdata->hid)) {
/*
* Remove previously installed properties if we
* are probing this device not for the very first
* time.
*/
device_remove_properties(&client->dev);
/*
* Now install the platform-specific properties
* that are missing from ACPI.
*/
device_add_properties(&client->dev, acpi_pdata->props);
break;
}
acpi_pdata++;
}
return 0;
}
#else
static int mxt_prepare_acpi_properties(struct i2c_client *client)
{
return -ENOENT;
}
#endif
static const struct dmi_system_id chromebook_T9_suspend_dmi[] = {
{
.matches = {
@ -3155,6 +3021,18 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
struct mxt_data *data;
int error;
/*
* Ignore devices that do not have device properties attached to
* them, as we need help determining whether we are dealing with
* touch screen or touchpad.
*
* So far on x86 the only users of Atmel touch controllers are
* Chromebooks, and chromeos_laptop driver will ensure that
* necessary properties are provided (if firmware does not do that).
*/
if (!device_property_present(&client->dev, "compatible"))
return -ENXIO;
/*
* Ignore ACPI devices representing bootloader mode.
*
@ -3186,10 +3064,6 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ?
MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP;
error = mxt_prepare_acpi_properties(client);
if (error && error != -ENOENT)
return error;
error = mxt_parse_device_properties(data);
if (error)
return error;
@ -3210,20 +3084,14 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id)
return error;
}
if (data->reset_gpio) {
data->in_bootloader = true;
msleep(MXT_RESET_TIME);
reinit_completion(&data->bl_completion);
gpiod_set_value(data->reset_gpio, 1);
error = mxt_wait_for_completion(data, &data->bl_completion,
MXT_RESET_TIMEOUT);
if (error)
return error;
data->in_bootloader = false;
}
disable_irq(client->irq);
if (data->reset_gpio) {
msleep(MXT_RESET_GPIO_TIME);
gpiod_set_value(data->reset_gpio, 1);
msleep(MXT_RESET_INVALID_CHG);
}
error = mxt_initialize(data);
if (error)
return error;

520
drivers/input/touchscreen/chipone_icn8505.c Normal file
View file

@ -0,0 +1,520 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for ChipOne icn8505 i2c touchscreen controller
*
* Copyright (c) 2015-2018 Red Hat Inc.
*
* Red Hat authors:
* Hans de Goede <hdegoede@redhat.com>
*/
#include <asm/unaligned.h>
#include <linux/acpi.h>
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
#include <linux/module.h>
/* Normal operation mode defines */
#define ICN8505_REG_ADDR_WIDTH 16
#define ICN8505_REG_POWER 0x0004
#define ICN8505_REG_TOUCHDATA 0x1000
#define ICN8505_REG_CONFIGDATA 0x8000
/* ICN8505_REG_POWER commands */
#define ICN8505_POWER_ACTIVE 0x00
#define ICN8505_POWER_MONITOR 0x01
#define ICN8505_POWER_HIBERNATE 0x02
/*
* The Android driver uses these to turn on/off the charger filter, but the
* filter is way too aggressive making e.g. onscreen keyboards unusable.
*/
#define ICN8505_POWER_ENA_CHARGER_MODE 0x55
#define ICN8505_POWER_DIS_CHARGER_MODE 0x66
#define ICN8505_MAX_TOUCHES 10
/* Programming mode defines */
#define ICN8505_PROG_I2C_ADDR 0x30
#define ICN8505_PROG_REG_ADDR_WIDTH 24
#define MAX_FW_UPLOAD_TRIES 3
struct icn8505_touch {
u8 slot;
u8 x[2];
u8 y[2];
u8 pressure; /* Seems more like finger width then pressure really */
u8 event;
/* The difference between 2 and 3 is unclear */
#define ICN8505_EVENT_NO_DATA 1 /* No finger seen yet since wakeup */
#define ICN8505_EVENT_UPDATE1 2 /* New or updated coordinates */
#define ICN8505_EVENT_UPDATE2 3 /* New or updated coordinates */
#define ICN8505_EVENT_END 4 /* Finger lifted */
} __packed;
struct icn8505_touch_data {
u8 softbutton;
u8 touch_count;
struct icn8505_touch touches[ICN8505_MAX_TOUCHES];
} __packed;
struct icn8505_data {
struct i2c_client *client;
struct input_dev *input;
struct gpio_desc *wake_gpio;
struct touchscreen_properties prop;
char firmware_name[32];
};
static int icn8505_read_xfer(struct i2c_client *client, u16 i2c_addr,
int reg_addr, int reg_addr_width,
void *data, int len, bool silent)
{
u8 buf[3];
int i, ret;
struct i2c_msg msg[2] = {
{
.addr = i2c_addr,
.buf = buf,
.len = reg_addr_width / 8,
},
{
.addr = i2c_addr,
.flags = I2C_M_RD,
.buf = data,
.len = len,
}
};
for (i = 0; i < (reg_addr_width / 8); i++)
buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;
ret = i2c_transfer(client->adapter, msg, 2);
if (ret != ARRAY_SIZE(msg)) {
if (ret >= 0)
ret = -EIO;
if (!silent)
dev_err(&client->dev,
"Error reading addr %#x reg %#x: %d\n",
i2c_addr, reg_addr, ret);
return ret;
}
return 0;
}
static int icn8505_write_xfer(struct i2c_client *client, u16 i2c_addr,
int reg_addr, int reg_addr_width,
const void *data, int len, bool silent)
{
u8 buf[3 + 32]; /* 3 bytes for 24 bit reg-addr + 32 bytes max len */
int i, ret;
struct i2c_msg msg = {
.addr = i2c_addr,
.buf = buf,
.len = reg_addr_width / 8 + len,
};
if (WARN_ON(len > 32))
return -EINVAL;
for (i = 0; i < (reg_addr_width / 8); i++)
buf[i] = (reg_addr >> (reg_addr_width - (i + 1) * 8)) & 0xff;
memcpy(buf + reg_addr_width / 8, data, len);
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret != 1) {
if (ret >= 0)
ret = -EIO;
if (!silent)
dev_err(&client->dev,
"Error writing addr %#x reg %#x: %d\n",
i2c_addr, reg_addr, ret);
return ret;
}
return 0;
}
static int icn8505_read_data(struct icn8505_data *icn8505, int reg,
void *buf, int len)
{
return icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_read_reg_silent(struct icn8505_data *icn8505, int reg)
{
u8 buf;
int error;
error = icn8505_read_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, &buf, 1, true);
if (error)
return error;
return buf;
}
static int icn8505_write_reg(struct icn8505_data *icn8505, int reg, u8 val)
{
return icn8505_write_xfer(icn8505->client, icn8505->client->addr, reg,
ICN8505_REG_ADDR_WIDTH, &val, 1, false);
}
static int icn8505_read_prog_data(struct icn8505_data *icn8505, int reg,
void *buf, int len)
{
return icn8505_read_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_write_prog_data(struct icn8505_data *icn8505, int reg,
const void *buf, int len)
{
return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, buf, len, false);
}
static int icn8505_write_prog_reg(struct icn8505_data *icn8505, int reg, u8 val)
{
return icn8505_write_xfer(icn8505->client, ICN8505_PROG_I2C_ADDR, reg,
ICN8505_PROG_REG_ADDR_WIDTH, &val, 1, false);
}
/*
* Note this function uses a number of magic register addresses and values,
* there are deliberately no defines for these because the algorithm is taken
* from the icn85xx Android driver and I do not want to make up possibly wrong
* names for the addresses and/or values.
*/
static int icn8505_try_fw_upload(struct icn8505_data *icn8505,
const struct firmware *fw)
{
struct device *dev = &icn8505->client->dev;
size_t offset, count;
int error;
u8 buf[4];
u32 crc;
/* Put the controller in programming mode */
error = icn8505_write_prog_reg(icn8505, 0xcc3355, 0x5a);
if (error)
return error;
usleep_range(2000, 5000);
error = icn8505_write_prog_reg(icn8505, 0x040400, 0x01);
if (error)
return error;
usleep_range(2000, 5000);
error = icn8505_read_prog_data(icn8505, 0x040002, buf, 1);
if (error)
return error;
if (buf[0] != 0x85) {
dev_err(dev, "Failed to enter programming mode\n");
return -ENODEV;
}
usleep_range(1000, 5000);
/* Enable CRC mode */
error = icn8505_write_prog_reg(icn8505, 0x40028, 1);
if (error)
return error;
/* Send the firmware to SRAM */
for (offset = 0; offset < fw->size; offset += count) {
count = min_t(size_t, fw->size - offset, 32);
error = icn8505_write_prog_data(icn8505, offset,
fw->data + offset, count);
if (error)
return error;
}
/* Disable CRC mode */
error = icn8505_write_prog_reg(icn8505, 0x40028, 0);
if (error)
return error;
/* Get and check length and CRC */
error = icn8505_read_prog_data(icn8505, 0x40034, buf, 2);
if (error)
return error;
if (get_unaligned_le16(buf) != fw->size) {
dev_warn(dev, "Length mismatch after uploading fw\n");
return -EIO;
}
error = icn8505_read_prog_data(icn8505, 0x4002c, buf, 4);
if (error)
return error;
crc = crc32_be(0, fw->data, fw->size);
if (get_unaligned_le32(buf) != crc) {
dev_warn(dev, "CRC mismatch after uploading fw\n");
return -EIO;
}
/* Boot controller from SRAM */
error = icn8505_write_prog_reg(icn8505, 0x40400, 0x03);
if (error)
return error;
usleep_range(2000, 5000);
return 0;
}
static int icn8505_upload_fw(struct icn8505_data *icn8505)
{
struct device *dev = &icn8505->client->dev;
const struct firmware *fw;
int i, error;
/*
* Always load the firmware, even if we don't need it at boot, we
* we may need it at resume. Having loaded it once will make the
* firmware class code cache it at suspend/resume.
*/
error = request_firmware(&fw, icn8505->firmware_name, dev);
if (error) {
dev_err(dev, "Firmware request error %d\n", error);
return error;
}
/* Check if the controller is not already up and running */
if (icn8505_read_reg_silent(icn8505, 0x000a) == 0x85)
goto success;
for (i = 1; i <= MAX_FW_UPLOAD_TRIES; i++) {
error = icn8505_try_fw_upload(icn8505, fw);
if (!error)
goto success;
dev_err(dev, "Failed to upload firmware: %d (attempt %d/%d)\n",
error, i, MAX_FW_UPLOAD_TRIES);
usleep_range(2000, 5000);
}
success:
release_firmware(fw);
return error;
}
static bool icn8505_touch_active(u8 event)
{
return event == ICN8505_EVENT_UPDATE1 ||
event == ICN8505_EVENT_UPDATE2;
}
static irqreturn_t icn8505_irq(int irq, void *dev_id)
{
struct icn8505_data *icn8505 = dev_id;
struct device *dev = &icn8505->client->dev;
struct icn8505_touch_data touch_data;
int i, error;
error = icn8505_read_data(icn8505, ICN8505_REG_TOUCHDATA,
&touch_data, sizeof(touch_data));
if (error) {
dev_err(dev, "Error reading touch data: %d\n", error);
return IRQ_HANDLED;
}
if (touch_data.touch_count > ICN8505_MAX_TOUCHES) {
dev_warn(dev, "Too many touches %d > %d\n",
touch_data.touch_count, ICN8505_MAX_TOUCHES);
touch_data.touch_count = ICN8505_MAX_TOUCHES;
}
for (i = 0; i < touch_data.touch_count; i++) {
struct icn8505_touch *touch = &touch_data.touches[i];
bool act = icn8505_touch_active(touch->event);
input_mt_slot(icn8505->input, touch->slot);
input_mt_report_slot_state(icn8505->input, MT_TOOL_FINGER, act);
if (!act)
continue;
touchscreen_report_pos(icn8505->input, &icn8505->prop,
get_unaligned_le16(touch->x),
get_unaligned_le16(touch->y),
true);
}
input_mt_sync_frame(icn8505->input);
input_report_key(icn8505->input, KEY_LEFTMETA,
touch_data.softbutton == 1);
input_sync(icn8505->input);
return IRQ_HANDLED;
}
static int icn8505_probe_acpi(struct icn8505_data *icn8505, struct device *dev)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
const char *subsys = "unknown";
struct acpi_device *adev;
union acpi_object *obj;
acpi_status status;
adev = ACPI_COMPANION(dev);
if (!adev)
return -ENODEV;
status = acpi_evaluate_object(adev->handle, "_SUB", NULL, &buffer);
if (ACPI_SUCCESS(status)) {
obj = buffer.pointer;
if (obj->type == ACPI_TYPE_STRING)
subsys = obj->string.pointer;
else
dev_warn(dev, "Warning ACPI _SUB did not return a string\n");
} else {
dev_warn(dev, "Warning ACPI _SUB failed: %#x\n", status);
buffer.pointer = NULL;
}
snprintf(icn8505->firmware_name, sizeof(icn8505->firmware_name),
"chipone/icn8505-%s.fw", subsys);
kfree(buffer.pointer);
return 0;
}
static int icn8505_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct icn8505_data *icn8505;
struct input_dev *input;
__le16 resolution[2];
int error;
if (!client->irq) {
dev_err(dev, "No irq specified\n");
return -EINVAL;
}
icn8505 = devm_kzalloc(dev, sizeof(*icn8505), GFP_KERNEL);
if (!icn8505)
return -ENOMEM;
input = devm_input_allocate_device(dev);
if (!input)
return -ENOMEM;
input->name = client->name;
input->id.bustype = BUS_I2C;
input_set_capability(input, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input, EV_ABS, ABS_MT_POSITION_Y);
input_set_capability(input, EV_KEY, KEY_LEFTMETA);
icn8505->client = client;
icn8505->input = input;
input_set_drvdata(input, icn8505);
error = icn8505_probe_acpi(icn8505, dev);
if (error)
return error;
error = icn8505_upload_fw(icn8505);
if (error)
return error;
error = icn8505_read_data(icn8505, ICN8505_REG_CONFIGDATA,
resolution, sizeof(resolution));
if (error) {
dev_err(dev, "Error reading resolution: %d\n", error);
return error;
}
input_set_abs_params(input, ABS_MT_POSITION_X, 0,
le16_to_cpu(resolution[0]) - 1, 0, 0);
input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
le16_to_cpu(resolution[1]) - 1, 0, 0);
touchscreen_parse_properties(input, true, &icn8505->prop);
if (!input_abs_get_max(input, ABS_MT_POSITION_X) ||
!input_abs_get_max(input, ABS_MT_POSITION_Y)) {
dev_err(dev, "Error touchscreen-size-x and/or -y missing\n");
return -EINVAL;
}
error = input_mt_init_slots(input, ICN8505_MAX_TOUCHES,
INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
if (error)
return error;
error = devm_request_threaded_irq(dev, client->irq, NULL, icn8505_irq,
IRQF_ONESHOT, client->name, icn8505);
if (error) {
dev_err(dev, "Error requesting irq: %d\n", error);
return error;
}
error = input_register_device(input);
if (error)
return error;
i2c_set_clientdata(client, icn8505);
return 0;
}
static int __maybe_unused icn8505_suspend(struct device *dev)
{
struct icn8505_data *icn8505 = i2c_get_clientdata(to_i2c_client(dev));
disable_irq(icn8505->client->irq);
icn8505_write_reg(icn8505, ICN8505_REG_POWER, ICN8505_POWER_HIBERNATE);
return 0;
}
static int __maybe_unused icn8505_resume(struct device *dev)
{
struct icn8505_data *icn8505 = i2c_get_clientdata(to_i2c_client(dev));
int error;
error = icn8505_upload_fw(icn8505);
if (error)
return error;
enable_irq(icn8505->client->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(icn8505_pm_ops, icn8505_suspend, icn8505_resume);
static const struct acpi_device_id icn8505_acpi_match[] = {
{ "CHPN0001" },
{ }
};
MODULE_DEVICE_TABLE(acpi, icn8505_acpi_match);
static struct i2c_driver icn8505_driver = {
.driver = {
.name = "chipone_icn8505",
.pm = &icn8505_pm_ops,
.acpi_match_table = icn8505_acpi_match,
},
.probe_new = icn8505_probe,
};
module_i2c_driver(icn8505_driver);
MODULE_DESCRIPTION("ChipOne icn8505 I2C Touchscreen Driver");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");

1
drivers/input/touchscreen/goodix.c
View file

@ -933,6 +933,7 @@ MODULE_DEVICE_TABLE(i2c, goodix_ts_id);
#ifdef CONFIG_ACPI
static const struct acpi_device_id goodix_acpi_match[] = {
{ "GDIX1001", 0 },
{ "GDIX1002", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);

2
drivers/input/touchscreen/mk712.c
View file

@ -17,7 +17,7 @@
* found in Gateway AOL Connected Touchpad computers.
*
* Documentation for ICS MK712 can be found at:
* http://www.idt.com/products/getDoc.cfm?docID=18713923
* https://www.idt.com/general-parts/mk712-touch-screen-controller
*/
/*

7
drivers/input/touchscreen/ti_am335x_tsc.c
View file

@ -34,6 +34,8 @@
#define SEQ_SETTLE 275
#define MAX_12BIT ((1 << 12) - 1)
#define TSC_IRQENB_MASK (IRQENB_FIFO0THRES | IRQENB_EOS | IRQENB_HW_PEN)
static const int config_pins[] = {
STEPCONFIG_XPP,
STEPCONFIG_XNN,
@ -274,6 +276,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
if (status & IRQENB_HW_PEN) {
ts_dev->pen_down = true;
irqclr |= IRQENB_HW_PEN;
pm_stay_awake(ts_dev->mfd_tscadc->dev);
}
if (status & IRQENB_PENUP) {
@ -283,6 +286,7 @@ static irqreturn_t titsc_irq(int irq, void *dev)
input_report_key(input_dev, BTN_TOUCH, 0);
input_report_abs(input_dev, ABS_PRESSURE, 0);
input_sync(input_dev);
pm_relax(ts_dev->mfd_tscadc->dev);
} else {
ts_dev->pen_down = true;
}
@ -432,6 +436,7 @@ static int titsc_probe(struct platform_device *pdev)
goto err_free_mem;
}
titsc_writel(ts_dev, REG_IRQSTATUS, TSC_IRQENB_MASK);
titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO0THRES);
titsc_writel(ts_dev, REG_IRQENABLE, IRQENB_EOS);
err = titsc_config_wires(ts_dev);
@ -495,6 +500,7 @@ static int __maybe_unused titsc_suspend(struct device *dev)
tscadc_dev = ti_tscadc_dev_get(to_platform_device(dev));
if (device_may_wakeup(tscadc_dev->dev)) {
titsc_writel(ts_dev, REG_IRQSTATUS, TSC_IRQENB_MASK);
idle = titsc_readl(ts_dev, REG_IRQENABLE);
titsc_writel(ts_dev, REG_IRQENABLE,
(idle | IRQENB_HW_PEN));
@ -513,6 +519,7 @@ static int __maybe_unused titsc_resume(struct device *dev)
titsc_writel(ts_dev, REG_IRQWAKEUP,
0x00);
titsc_writel(ts_dev, REG_IRQCLR, IRQENB_HW_PEN);
pm_relax(ts_dev->mfd_tscadc->dev);
}
titsc_step_config(ts_dev);
titsc_writel(ts_dev, REG_FIFO0THR,

94
drivers/input/touchscreen/usbtouchscreen.c
View file

@ -440,6 +440,8 @@ static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
#define MTOUCHUSB_RESET 7
#define MTOUCHUSB_REQ_CTRLLR_ID 10
#define MTOUCHUSB_REQ_CTRLLR_ID_LEN 16
static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if (hwcalib_xy) {
@ -454,11 +456,93 @@ static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
return 1;
}
struct mtouch_priv {
u8 fw_rev_major;
u8 fw_rev_minor;
};
static ssize_t mtouch_firmware_rev_show(struct device *dev,
struct device_attribute *attr, char *output)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
struct mtouch_priv *priv = usbtouch->priv;
return scnprintf(output, PAGE_SIZE, "%1x.%1x\n",
priv->fw_rev_major, priv->fw_rev_minor);
}
static DEVICE_ATTR(firmware_rev, 0444, mtouch_firmware_rev_show, NULL);
static struct attribute *mtouch_attrs[] = {
&dev_attr_firmware_rev.attr,
NULL
};
static const struct attribute_group mtouch_attr_group = {
.attrs = mtouch_attrs,
};
static int mtouch_get_fw_revision(struct usbtouch_usb *usbtouch)
{
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
struct mtouch_priv *priv = usbtouch->priv;
u8 *buf;
int ret;
buf = kzalloc(MTOUCHUSB_REQ_CTRLLR_ID_LEN, GFP_NOIO);
if (!buf)
return -ENOMEM;
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
MTOUCHUSB_REQ_CTRLLR_ID,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, MTOUCHUSB_REQ_CTRLLR_ID_LEN,
USB_CTRL_SET_TIMEOUT);
if (ret != MTOUCHUSB_REQ_CTRLLR_ID_LEN) {
dev_warn(&usbtouch->interface->dev,
"Failed to read FW rev: %d\n", ret);
ret = ret < 0 ? ret : -EIO;
goto free;
}
priv->fw_rev_major = buf[3];
priv->fw_rev_minor = buf[4];
ret = 0;
free:
kfree(buf);
return ret;
}
static int mtouch_alloc(struct usbtouch_usb *usbtouch)
{
int ret;
usbtouch->priv = kmalloc(sizeof(struct mtouch_priv), GFP_KERNEL);
if (!usbtouch->priv)
return -ENOMEM;
ret = sysfs_create_group(&usbtouch->interface->dev.kobj,
&mtouch_attr_group);
if (ret) {
kfree(usbtouch->priv);
usbtouch->priv = NULL;
return ret;
}
return 0;
}
static int mtouch_init(struct usbtouch_usb *usbtouch)
{
int ret, i;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
ret = mtouch_get_fw_revision(usbtouch);
if (ret)
return ret;
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
MTOUCHUSB_RESET,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
@ -492,6 +576,14 @@ static int mtouch_init(struct usbtouch_usb *usbtouch)
return 0;
}
static void mtouch_exit(struct usbtouch_usb *usbtouch)
{
struct mtouch_priv *priv = usbtouch->priv;
sysfs_remove_group(&usbtouch->interface->dev.kobj, &mtouch_attr_group);
kfree(priv);
}
#endif
@ -1119,7 +1211,9 @@ static struct usbtouch_device_info usbtouch_dev_info[] = {
.max_yc = 0x4000,
.rept_size = 11,
.read_data = mtouch_read_data,
.alloc = mtouch_alloc,
.init = mtouch_init,
.exit = mtouch_exit,
},
#endif

19
drivers/mfd/cros_ec.c
View file

@ -229,7 +229,7 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev)
}
EXPORT_SYMBOL(cros_ec_suspend);
static void cros_ec_drain_events(struct cros_ec_device *ec_dev)
static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev)
{
while (cros_ec_get_next_event(ec_dev, NULL) > 0)
blocking_notifier_call_chain(&ec_dev->event_notifier,
@ -253,21 +253,16 @@ int cros_ec_resume(struct cros_ec_device *ec_dev)
dev_dbg(ec_dev->dev, "Error %d sending resume event to ec",
ret);
/*
* In some cases, we need to distinguish between events that occur
* during suspend if the EC is not a wake source. For example,
* keypresses during suspend should be discarded if it does not wake
* the system.
*
* If the EC is not a wake source, drain the event queue and mark them
* as "queued during suspend".
*/
if (ec_dev->wake_enabled) {
disable_irq_wake(ec_dev->irq);
ec_dev->wake_enabled = 0;
} else {
cros_ec_drain_events(ec_dev);
}
/*
* Let the mfd devices know about events that occur during
* suspend. This way the clients know what to do with them.
*/
cros_ec_report_events_during_suspend(ec_dev);
return 0;
}