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Input: wacom - add Intuos5 Touch Ring LED support 

The Touch Ring LEDs on Intuos5 tablets use a different report
format which supports only 4 levels of brightness. We remap
the 7-bit value obtained from sysfs to an appropriate value
for the tablet. Control of the crop mark LEDs (new to the I5)
is left for a later patch.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Reviewed-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Jason Gerecke 2012-04-03 15:50:37 -07:00 committed by Dmitry Torokhov
parent f860e581fd
commit 9b5b95dd51
2 changed files with 65 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
Documentation/ABI/testing/sysfs-driver-wacom
View File

@ -15,9 +15,10 @@ Contact: linux-input@vger.kernel.org
Description:
Attribute group for control of the status LEDs and the OLEDs.
This attribute group is only available for Intuos 4 M, L,
and XL (with LEDs and OLEDs) and Cintiq 21UX2 and Cintiq 24HD
(LEDs only). Therefore its presence implicitly signifies the
presence of said LEDs and OLEDs on the tablet device.
and XL (with LEDs and OLEDs), Intuos 5 (LEDs only), and Cintiq
21UX2 and Cintiq 24HD (LEDs only). Therefore its presence
implicitly signifies the presence of said LEDs and OLEDs on the
tablet device.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status0_luminance
Date: August 2011
@ -40,10 +41,10 @@ What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status_led0
Date: August 2011
Contact: linux-input@vger.kernel.org
Description:
Writing to this file sets which one of the four (for Intuos 4)
or of the right four (for Cintiq 21UX2 and Cintiq 24HD) status
LEDs is active (0..3). The other three LEDs on the same side are
always inactive.
Writing to this file sets which one of the four (for Intuos 4
and Intuos 5) or of the right four (for Cintiq 21UX2 and Cintiq
24HD) status LEDs is active (0..3). The other three LEDs on the
same side are always inactive.
What: /sys/bus/usb/devices/<busnum>-<devnum>:<cfg>.<intf>/wacom_led/status_led1_select
Date: September 2011

67
drivers/input/tablet/wacom_sys.c
View File

@ -574,23 +574,39 @@ static void wacom_remove_shared_data(struct wacom_wac *wacom)
static int wacom_led_control(struct wacom *wacom)
{
unsigned char *buf;
int retval, led = 0;
int retval;
buf = kzalloc(9, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
wacom->wacom_wac.features.type == WACOM_24HD)
led = (wacom->led.select[1] << 4) | 0x40;
if (wacom->wacom_wac.features.type >= INTUOS5S &&
wacom->wacom_wac.features.type <= INTUOS5L) {
/*
* Touch Ring and crop mark LED luminance may take on
* one of four values:
* 0 = Low; 1 = Medium; 2 = High; 3 = Off
*/
int ring_led = wacom->led.select[0] & 0x03;
int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
int crop_lum = 0;
led |= wacom->led.select[0] | 0x4;
buf[0] = WAC_CMD_LED_CONTROL;
buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
}
else {
int led = wacom->led.select[0] | 0x4;
buf[0] = WAC_CMD_LED_CONTROL;
buf[1] = led;
buf[2] = wacom->led.llv;
buf[3] = wacom->led.hlv;
buf[4] = wacom->led.img_lum;
if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
wacom->wacom_wac.features.type == WACOM_24HD)
led |= (wacom->led.select[1] << 4) | 0x40;
buf[0] = WAC_CMD_LED_CONTROL;
buf[1] = led;
buf[2] = wacom->led.llv;
buf[3] = wacom->led.hlv;
buf[4] = wacom->led.img_lum;
}
retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
buf, 9, WAC_CMD_RETRIES);
@ -783,6 +799,17 @@ static struct attribute_group intuos4_led_attr_group = {
.attrs = intuos4_led_attrs,
};
static struct attribute *intuos5_led_attrs[] = {
&dev_attr_status0_luminance.attr,
&dev_attr_status_led0_select.attr,
NULL
};
static struct attribute_group intuos5_led_attr_group = {
.name = "wacom_led",
.attrs = intuos5_led_attrs,
};
static int wacom_initialize_leds(struct wacom *wacom)
{
int error;
@ -812,6 +839,19 @@ static int wacom_initialize_leds(struct wacom *wacom)
&cintiq_led_attr_group);
break;
case INTUOS5S:
case INTUOS5:
case INTUOS5L:
wacom->led.select[0] = 0;
wacom->led.select[1] = 0;
wacom->led.llv = 32;
wacom->led.hlv = 0;
wacom->led.img_lum = 0;
error = sysfs_create_group(&wacom->intf->dev.kobj,
&intuos5_led_attr_group);
break;
default:
return 0;
}
@ -840,6 +880,13 @@ static void wacom_destroy_leds(struct wacom *wacom)
sysfs_remove_group(&wacom->intf->dev.kobj,
&cintiq_led_attr_group);
break;
case INTUOS5S:
case INTUOS5:
case INTUOS5L:
sysfs_remove_group(&wacom->intf->dev.kobj,
&intuos5_led_attr_group);
break;
}
}