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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: update multi-touch protocol documentation Input: add the ABS_MT_PRESSURE event Input: winbond-cir - remove dmesg spam Input: lifebook - add another Lifebook DMI signature Input: ad7879 - support auxiliary GPIOs via gpiolib
This commit is contained in:
Linus Torvalds
commit
499a267371
@ -27,12 +27,30 @@ set of events/packets.
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A set of ABS_MT events with the desired properties is defined. The events
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are divided into categories, to allow for partial implementation. The
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minimum set consists of ABS_MT_TOUCH_MAJOR, ABS_MT_POSITION_X and
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ABS_MT_POSITION_Y, which allows for multiple fingers to be tracked. If the
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device supports it, the ABS_MT_WIDTH_MAJOR may be used to provide the size
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of the approaching finger. Anisotropy and direction may be specified with
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ABS_MT_TOUCH_MINOR, ABS_MT_WIDTH_MINOR and ABS_MT_ORIENTATION. The
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ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a
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minimum set consists of ABS_MT_POSITION_X and ABS_MT_POSITION_Y, which
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allows for multiple fingers to be tracked. If the device supports it, the
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ABS_MT_TOUCH_MAJOR and ABS_MT_WIDTH_MAJOR may be used to provide the size
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of the contact area and approaching finger, respectively.
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The TOUCH and WIDTH parameters have a geometrical interpretation; imagine
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looking through a window at someone gently holding a finger against the
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glass. You will see two regions, one inner region consisting of the part
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of the finger actually touching the glass, and one outer region formed by
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the perimeter of the finger. The diameter of the inner region is the
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ABS_MT_TOUCH_MAJOR, the diameter of the outer region is
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ABS_MT_WIDTH_MAJOR. Now imagine the person pressing the finger harder
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against the glass. The inner region will increase, and in general, the
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ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR, which is always smaller than
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unity, is related to the finger pressure. For pressure-based devices,
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ABS_MT_PRESSURE may be used to provide the pressure on the contact area
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instead.
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In addition to the MAJOR parameters, the oval shape of the finger can be
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described by adding the MINOR parameters, such that MAJOR and MINOR are the
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major and minor axis of an ellipse. Finally, the orientation of the oval
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shape can be describe with the ORIENTATION parameter.
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The ABS_MT_TOOL_TYPE may be used to specify whether the touching tool is a
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finger or a pen or something else. Devices with more granular information
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may specify general shapes as blobs, i.e., as a sequence of rectangular
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shapes grouped together by an ABS_MT_BLOB_ID. Finally, for the few devices
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@ -42,11 +60,9 @@ report finger tracking from hardware [5].
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Here is what a minimal event sequence for a two-finger touch would look
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like:
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ABS_MT_TOUCH_MAJOR
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ABS_MT_POSITION_X
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ABS_MT_POSITION_Y
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SYN_MT_REPORT
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ABS_MT_TOUCH_MAJOR
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ABS_MT_POSITION_X
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ABS_MT_POSITION_Y
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SYN_MT_REPORT
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@ -87,6 +103,12 @@ the contact. The ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR approximates
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the notion of pressure. The fingers of the hand and the palm all have
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different characteristic widths [1].
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ABS_MT_PRESSURE
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The pressure, in arbitrary units, on the contact area. May be used instead
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of TOUCH and WIDTH for pressure-based devices or any device with a spatial
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signal intensity distribution.
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ABS_MT_ORIENTATION
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The orientation of the ellipse. The value should describe a signed quarter
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@ -170,6 +192,16 @@ There are a few devices that support trackingID in hardware. User space can
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make use of these native identifiers to reduce bandwidth and cpu usage.
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Gestures
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--------
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In the specific application of creating gesture events, the TOUCH and WIDTH
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parameters can be used to, e.g., approximate finger pressure or distinguish
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between index finger and thumb. With the addition of the MINOR parameters,
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one can also distinguish between a sweeping finger and a pointing finger,
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and with ORIENTATION, one can detect twisting of fingers.
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Notes
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-----
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@ -46,6 +46,7 @@ static unsigned int input_abs_bypass_init_data[] __initdata = {
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ABS_MT_TOOL_TYPE,
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ABS_MT_BLOB_ID,
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ABS_MT_TRACKING_ID,
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ABS_MT_PRESSURE,
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0
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};
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static unsigned long input_abs_bypass[BITS_TO_LONGS(ABS_CNT)];
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@ -768,7 +768,7 @@ wbcir_parse_rc6(struct device *dev, struct wbcir_data *data)
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return;
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}
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dev_info(dev, "IR-RC6 ad 0x%02X cm 0x%02X cu 0x%04X "
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dev_dbg(dev, "IR-RC6 ad 0x%02X cm 0x%02X cu 0x%04X "
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"toggle %u mode %u scan 0x%08X\n",
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address,
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command,
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@ -50,6 +50,12 @@ static const struct dmi_system_id __initconst lifebook_dmi_table[] = {
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DMI_MATCH(DMI_PRODUCT_NAME, "FLORA-ie 55mi"),
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},
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},
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{
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/* LifeBook B */
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.matches = {
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DMI_MATCH(DMI_PRODUCT_NAME, "Lifebook B Series"),
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},
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},
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{
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/* LifeBook B */
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.matches = {
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@ -47,6 +47,7 @@
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#include <linux/workqueue.h>
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#include <linux/spi/spi.h>
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#include <linux/i2c.h>
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#include <linux/gpio.h>
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#include <linux/spi/ad7879.h>
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@ -132,7 +133,9 @@ struct ad7879 {
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struct input_dev *input;
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struct work_struct work;
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struct timer_list timer;
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#ifdef CONFIG_GPIOLIB
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struct gpio_chip gc;
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#endif
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struct mutex mutex;
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unsigned disabled:1; /* P: mutex */
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@ -150,11 +153,9 @@ struct ad7879 {
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u8 median;
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u16 x_plate_ohms;
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u16 pressure_max;
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u16 gpio_init;
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u16 cmd_crtl1;
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u16 cmd_crtl2;
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u16 cmd_crtl3;
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unsigned gpio:1;
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};
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static int ad7879_read(bus_device *, u8);
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@ -237,24 +238,6 @@ static irqreturn_t ad7879_irq(int irq, void *handle)
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static void ad7879_setup(struct ad7879 *ts)
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{
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ts->cmd_crtl3 = AD7879_YPLUS_BIT |
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AD7879_XPLUS_BIT |
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AD7879_Z2_BIT |
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AD7879_Z1_BIT |
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AD7879_TEMPMASK_BIT |
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AD7879_AUXVBATMASK_BIT |
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AD7879_GPIOALERTMASK_BIT;
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ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR |
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AD7879_AVG(ts->averaging) |
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AD7879_MFS(ts->median) |
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AD7879_FCD(ts->first_conversion_delay) |
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ts->gpio_init;
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ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 |
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AD7879_ACQ(ts->acquisition_time) |
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AD7879_TMR(ts->pen_down_acc_interval);
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ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
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ad7879_write(ts->bus, AD7879_REG_CTRL3, ts->cmd_crtl3);
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ad7879_write(ts->bus, AD7879_REG_CTRL1, ts->cmd_crtl1);
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@ -324,42 +307,8 @@ static ssize_t ad7879_disable_store(struct device *dev,
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static DEVICE_ATTR(disable, 0664, ad7879_disable_show, ad7879_disable_store);
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static ssize_t ad7879_gpio_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct ad7879 *ts = dev_get_drvdata(dev);
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return sprintf(buf, "%u\n", ts->gpio);
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}
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static ssize_t ad7879_gpio_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct ad7879 *ts = dev_get_drvdata(dev);
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unsigned long val;
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int error;
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error = strict_strtoul(buf, 10, &val);
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if (error)
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return error;
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mutex_lock(&ts->mutex);
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ts->gpio = !!val;
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error = ad7879_write(ts->bus, AD7879_REG_CTRL2,
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ts->gpio ?
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ts->cmd_crtl2 & ~AD7879_GPIO_DATA :
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ts->cmd_crtl2 | AD7879_GPIO_DATA);
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mutex_unlock(&ts->mutex);
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return error ? : count;
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}
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static DEVICE_ATTR(gpio, 0664, ad7879_gpio_show, ad7879_gpio_store);
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static struct attribute *ad7879_attributes[] = {
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&dev_attr_disable.attr,
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&dev_attr_gpio.attr,
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NULL
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};
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@ -367,6 +316,124 @@ static const struct attribute_group ad7879_attr_group = {
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.attrs = ad7879_attributes,
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};
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#ifdef CONFIG_GPIOLIB
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static int ad7879_gpio_direction_input(struct gpio_chip *chip,
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unsigned gpio)
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{
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struct ad7879 *ts = container_of(chip, struct ad7879, gc);
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int err;
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mutex_lock(&ts->mutex);
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ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL;
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err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
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mutex_unlock(&ts->mutex);
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return err;
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}
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static int ad7879_gpio_direction_output(struct gpio_chip *chip,
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unsigned gpio, int level)
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{
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struct ad7879 *ts = container_of(chip, struct ad7879, gc);
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int err;
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mutex_lock(&ts->mutex);
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ts->cmd_crtl2 &= ~AD7879_GPIODIR;
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ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIOPOL;
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if (level)
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ts->cmd_crtl2 |= AD7879_GPIO_DATA;
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else
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ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
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err = ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
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mutex_unlock(&ts->mutex);
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return err;
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}
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static int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
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{
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struct ad7879 *ts = container_of(chip, struct ad7879, gc);
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u16 val;
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mutex_lock(&ts->mutex);
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val = ad7879_read(ts->bus, AD7879_REG_CTRL2);
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mutex_unlock(&ts->mutex);
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return !!(val & AD7879_GPIO_DATA);
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}
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static void ad7879_gpio_set_value(struct gpio_chip *chip,
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unsigned gpio, int value)
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{
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struct ad7879 *ts = container_of(chip, struct ad7879, gc);
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mutex_lock(&ts->mutex);
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if (value)
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ts->cmd_crtl2 |= AD7879_GPIO_DATA;
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else
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ts->cmd_crtl2 &= ~AD7879_GPIO_DATA;
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ad7879_write(ts->bus, AD7879_REG_CTRL2, ts->cmd_crtl2);
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mutex_unlock(&ts->mutex);
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}
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static int __devinit ad7879_gpio_add(struct device *dev)
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{
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struct ad7879 *ts = dev_get_drvdata(dev);
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struct ad7879_platform_data *pdata = dev->platform_data;
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int ret = 0;
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if (pdata->gpio_export) {
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ts->gc.direction_input = ad7879_gpio_direction_input;
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ts->gc.direction_output = ad7879_gpio_direction_output;
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ts->gc.get = ad7879_gpio_get_value;
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ts->gc.set = ad7879_gpio_set_value;
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ts->gc.can_sleep = 1;
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ts->gc.base = pdata->gpio_base;
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ts->gc.ngpio = 1;
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ts->gc.label = "AD7879-GPIO";
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ts->gc.owner = THIS_MODULE;
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ts->gc.dev = dev;
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ret = gpiochip_add(&ts->gc);
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if (ret)
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dev_err(dev, "failed to register gpio %d\n",
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ts->gc.base);
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}
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return ret;
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}
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/*
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* We mark ad7879_gpio_remove inline so there is a chance the code
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* gets discarded when not needed. We can't do __devinit/__devexit
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* markup since it is used in both probe and remove methods.
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*/
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static inline void ad7879_gpio_remove(struct device *dev)
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{
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struct ad7879 *ts = dev_get_drvdata(dev);
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struct ad7879_platform_data *pdata = dev->platform_data;
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int ret;
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if (pdata->gpio_export) {
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ret = gpiochip_remove(&ts->gc);
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if (ret)
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dev_err(dev, "failed to remove gpio %d\n",
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ts->gc.base);
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}
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}
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#else
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static inline int ad7879_gpio_add(struct device *dev)
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{
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return 0;
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}
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static inline void ad7879_gpio_remove(struct device *dev)
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{
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}
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#endif
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static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
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{
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struct input_dev *input_dev;
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@ -403,12 +470,6 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
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ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
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ts->median = pdata->median;
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if (pdata->gpio_output)
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ts->gpio_init = AD7879_GPIO_EN |
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(pdata->gpio_default ? 0 : AD7879_GPIO_DATA);
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else
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ts->gpio_init = AD7879_GPIO_EN | AD7879_GPIODIR;
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snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&bus->dev));
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input_dev->name = "AD7879 Touchscreen";
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@ -446,6 +507,23 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
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goto err_free_mem;
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}
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ts->cmd_crtl3 = AD7879_YPLUS_BIT |
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AD7879_XPLUS_BIT |
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AD7879_Z2_BIT |
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AD7879_Z1_BIT |
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AD7879_TEMPMASK_BIT |
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AD7879_AUXVBATMASK_BIT |
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AD7879_GPIOALERTMASK_BIT;
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ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR |
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AD7879_AVG(ts->averaging) |
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AD7879_MFS(ts->median) |
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AD7879_FCD(ts->first_conversion_delay);
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ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 |
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AD7879_ACQ(ts->acquisition_time) |
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AD7879_TMR(ts->pen_down_acc_interval);
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ad7879_setup(ts);
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err = request_irq(bus->irq, ad7879_irq,
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@ -460,15 +538,21 @@ static int __devinit ad7879_construct(bus_device *bus, struct ad7879 *ts)
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if (err)
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goto err_free_irq;
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err = input_register_device(input_dev);
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err = ad7879_gpio_add(&bus->dev);
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if (err)
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goto err_remove_attr;
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err = input_register_device(input_dev);
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if (err)
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goto err_remove_gpio;
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dev_info(&bus->dev, "Rev.%d touchscreen, irq %d\n",
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revid >> 8, bus->irq);
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return 0;
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err_remove_gpio:
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ad7879_gpio_remove(&bus->dev);
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err_remove_attr:
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sysfs_remove_group(&bus->dev.kobj, &ad7879_attr_group);
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err_free_irq:
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@ -481,6 +565,7 @@ err_free_mem:
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static int __devexit ad7879_destroy(bus_device *bus, struct ad7879 *ts)
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{
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ad7879_gpio_remove(&bus->dev);
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ad7879_disable(ts);
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sysfs_remove_group(&ts->bus->dev.kobj, &ad7879_attr_group);
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free_irq(ts->bus->irq, ts);
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@ -660,6 +660,7 @@ struct input_absinfo {
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#define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device */
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#define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */
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#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */
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#define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */
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#define ABS_MAX 0x3f
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#define ABS_CNT (ABS_MAX+1)
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@ -28,8 +28,12 @@ struct ad7879_platform_data {
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* 1 = 4, 2 = 8, 3 = 16 (median > averaging)
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*/
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u8 median;
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/* 1 = AUX/VBAT/GPIO set to GPIO Output */
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u8 gpio_output;
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/* Initial GPIO pin state (valid if gpio_output = 1) */
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u8 gpio_default;
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/* 1 = AUX/VBAT/GPIO export GPIO to gpiolib
|
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* requires CONFIG_GPIOLIB
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||||
*/
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bool gpio_export;
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/* identifies the first GPIO number handled by this chip;
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||||
* or, if negative, requests dynamic ID allocation.
|
||||
*/
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s32 gpio_base;
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||||
};
|
||||
|
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