Merge branch 'next' into for-linus
Prepare second round of input updates for 4.3 merge window.
This commit is contained in:
commit
bbdb5c22e1
|
@ -1,14 +1,15 @@
|
|||
* Texas Instruments tsc2005 touchscreen controller
|
||||
* Texas Instruments tsc2004 and tsc2005 touchscreen controllers
|
||||
|
||||
Required properties:
|
||||
- compatible : "ti,tsc2005"
|
||||
- reg : SPI device address
|
||||
- spi-max-frequency : Maximal SPI speed
|
||||
- compatible : "ti,tsc2004" or "ti,tsc2005"
|
||||
- reg : Device address
|
||||
- interrupts : IRQ specifier
|
||||
- reset-gpios : GPIO specifier
|
||||
- vio-supply : Regulator specifier
|
||||
- spi-max-frequency : Maximum SPI clocking speed of the device
|
||||
(for tsc2005)
|
||||
|
||||
Optional properties:
|
||||
- vio-supply : Regulator specifier
|
||||
- reset-gpios : GPIO specifier for the controller reset line
|
||||
- ti,x-plate-ohms : integer, resistance of the touchscreen's X plates
|
||||
in ohm (defaults to 280)
|
||||
- ti,esd-recovery-timeout-ms : integer, if the touchscreen does not respond after
|
||||
|
@ -18,6 +19,27 @@ Optional properties:
|
|||
|
||||
Example:
|
||||
|
||||
&i2c3 {
|
||||
tsc2004@48 {
|
||||
compatible = "ti,tsc2004";
|
||||
reg = <0x48>;
|
||||
vio-supply = <&vio>;
|
||||
|
||||
reset-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>;
|
||||
interrupts-extended = <&gpio1 27 IRQ_TYPE_EDGE_RISING>;
|
||||
|
||||
touchscreen-fuzz-x = <4>;
|
||||
touchscreen-fuzz-y = <7>;
|
||||
touchscreen-fuzz-pressure = <2>;
|
||||
touchscreen-size-x = <4096>;
|
||||
touchscreen-size-y = <4096>;
|
||||
touchscreen-max-pressure = <2048>;
|
||||
|
||||
ti,x-plate-ohms = <280>;
|
||||
ti,esd-recovery-timeout-ms = <8000>;
|
||||
};
|
||||
}
|
||||
|
||||
&mcspi1 {
|
||||
tsc2005@0 {
|
||||
compatible = "ti,tsc2005";
|
||||
|
|
|
@ -1520,6 +1520,13 @@ static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = {
|
|||
DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E544"),
|
||||
},
|
||||
},
|
||||
{
|
||||
/* Fujitsu LIFEBOOK U745 does not work with crc_enabled == 0 */
|
||||
.matches = {
|
||||
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
|
||||
DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U745"),
|
||||
},
|
||||
},
|
||||
#endif
|
||||
{ }
|
||||
};
|
||||
|
|
|
@ -164,7 +164,7 @@ static int parkbd_getport(struct parport *pp)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct serio * __init parkbd_allocate_serio(void)
|
||||
static struct serio *parkbd_allocate_serio(void)
|
||||
{
|
||||
struct serio *serio;
|
||||
|
||||
|
|
|
@ -939,10 +939,27 @@ config TOUCHSCREEN_TSC_SERIO
|
|||
To compile this driver as a module, choose M here: the
|
||||
module will be called tsc40.
|
||||
|
||||
config TOUCHSCREEN_TSC200X_CORE
|
||||
tristate
|
||||
|
||||
config TOUCHSCREEN_TSC2004
|
||||
tristate "TSC2004 based touchscreens"
|
||||
depends on I2C
|
||||
select REGMAP_I2C
|
||||
select TOUCHSCREEN_TSC200X_CORE
|
||||
help
|
||||
Say Y here if you have a TSC2004 based touchscreen.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called tsc2004.
|
||||
|
||||
config TOUCHSCREEN_TSC2005
|
||||
tristate "TSC2005 based touchscreens"
|
||||
depends on SPI_MASTER
|
||||
select REGMAP_SPI
|
||||
select TOUCHSCREEN_TSC200X_CORE
|
||||
help
|
||||
Say Y here if you have a TSC2005 based touchscreen.
|
||||
|
||||
|
|
|
@ -69,6 +69,8 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
|
|||
obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TSC_SERIO) += tsc40.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TSC200X_CORE) += tsc200x-core.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TSC2004) += tsc2004.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
|
||||
|
|
|
@ -0,0 +1,83 @@
|
|||
/*
|
||||
* TSC2004 touchscreen driver
|
||||
*
|
||||
* Copyright (C) 2015 QWERTY Embedded Design
|
||||
* Copyright (C) 2015 EMAC Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/regmap.h>
|
||||
#include "tsc200x-core.h"
|
||||
|
||||
static int tsc2004_cmd(struct device *dev, u8 cmd)
|
||||
{
|
||||
u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
|
||||
s32 data;
|
||||
struct i2c_client *i2c = to_i2c_client(dev);
|
||||
|
||||
data = i2c_smbus_write_byte(i2c, tx);
|
||||
if (data < 0) {
|
||||
dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
|
||||
__func__, cmd, data);
|
||||
return data;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tsc2004_probe(struct i2c_client *i2c,
|
||||
const struct i2c_device_id *id)
|
||||
|
||||
{
|
||||
return tsc200x_probe(&i2c->dev, i2c->irq, BUS_I2C,
|
||||
devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
|
||||
tsc2004_cmd);
|
||||
}
|
||||
|
||||
static int tsc2004_remove(struct i2c_client *i2c)
|
||||
{
|
||||
return tsc200x_remove(&i2c->dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id tsc2004_idtable[] = {
|
||||
{ "tsc2004", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static const struct of_device_id tsc2004_of_match[] = {
|
||||
{ .compatible = "ti,tsc2004" },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, tsc2004_of_match);
|
||||
#endif
|
||||
|
||||
static struct i2c_driver tsc2004_driver = {
|
||||
.driver = {
|
||||
.name = "tsc2004",
|
||||
.of_match_table = of_match_ptr(tsc2004_of_match),
|
||||
.pm = &tsc200x_pm_ops,
|
||||
},
|
||||
.id_table = tsc2004_idtable,
|
||||
.probe = tsc2004_probe,
|
||||
.remove = tsc2004_remove,
|
||||
};
|
||||
module_i2c_driver(tsc2004_driver);
|
||||
|
||||
MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
|
||||
MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
|
||||
MODULE_LICENSE("GPL");
|
|
@ -2,9 +2,10 @@
|
|||
* TSC2005 touchscreen driver
|
||||
*
|
||||
* Copyright (C) 2006-2010 Nokia Corporation
|
||||
* Copyright (C) 2015 QWERTY Embedded Design
|
||||
* Copyright (C) 2015 EMAC Inc.
|
||||
*
|
||||
* Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
|
||||
* based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
|
||||
* Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
|
@ -15,192 +16,32 @@
|
|||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/input/touchscreen.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/spi/spi.h>
|
||||
#include <linux/spi/tsc2005.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include "tsc200x-core.h"
|
||||
|
||||
/*
|
||||
* The touchscreen interface operates as follows:
|
||||
*
|
||||
* 1) Pen is pressed against the touchscreen.
|
||||
* 2) TSC2005 performs AD conversion.
|
||||
* 3) After the conversion is done TSC2005 drives DAV line down.
|
||||
* 4) GPIO IRQ is received and tsc2005_irq_thread() is scheduled.
|
||||
* 5) tsc2005_irq_thread() queues up an spi transfer to fetch the x, y, z1, z2
|
||||
* values.
|
||||
* 6) tsc2005_irq_thread() reports coordinates to input layer and sets up
|
||||
* tsc2005_penup_timer() to be called after TSC2005_PENUP_TIME_MS (40ms).
|
||||
* 7) When the penup timer expires, there have not been touch or DAV interrupts
|
||||
* during the last 40ms which means the pen has been lifted.
|
||||
*
|
||||
* ESD recovery via a hardware reset is done if the TSC2005 doesn't respond
|
||||
* after a configurable period (in ms) of activity. If esd_timeout is 0, the
|
||||
* watchdog is disabled.
|
||||
*/
|
||||
|
||||
/* control byte 1 */
|
||||
#define TSC2005_CMD 0x80
|
||||
#define TSC2005_CMD_NORMAL 0x00
|
||||
#define TSC2005_CMD_STOP 0x01
|
||||
#define TSC2005_CMD_12BIT 0x04
|
||||
|
||||
/* control byte 0 */
|
||||
#define TSC2005_REG_READ 0x01 /* R/W access */
|
||||
#define TSC2005_REG_PND0 0x02 /* Power Not Down Control */
|
||||
#define TSC2005_REG_X (0x0 << 3)
|
||||
#define TSC2005_REG_Y (0x1 << 3)
|
||||
#define TSC2005_REG_Z1 (0x2 << 3)
|
||||
#define TSC2005_REG_Z2 (0x3 << 3)
|
||||
#define TSC2005_REG_AUX (0x4 << 3)
|
||||
#define TSC2005_REG_TEMP1 (0x5 << 3)
|
||||
#define TSC2005_REG_TEMP2 (0x6 << 3)
|
||||
#define TSC2005_REG_STATUS (0x7 << 3)
|
||||
#define TSC2005_REG_AUX_HIGH (0x8 << 3)
|
||||
#define TSC2005_REG_AUX_LOW (0x9 << 3)
|
||||
#define TSC2005_REG_TEMP_HIGH (0xA << 3)
|
||||
#define TSC2005_REG_TEMP_LOW (0xB << 3)
|
||||
#define TSC2005_REG_CFR0 (0xC << 3)
|
||||
#define TSC2005_REG_CFR1 (0xD << 3)
|
||||
#define TSC2005_REG_CFR2 (0xE << 3)
|
||||
#define TSC2005_REG_CONV_FUNC (0xF << 3)
|
||||
|
||||
/* configuration register 0 */
|
||||
#define TSC2005_CFR0_PRECHARGE_276US 0x0040
|
||||
#define TSC2005_CFR0_STABTIME_1MS 0x0300
|
||||
#define TSC2005_CFR0_CLOCK_1MHZ 0x1000
|
||||
#define TSC2005_CFR0_RESOLUTION12 0x2000
|
||||
#define TSC2005_CFR0_PENMODE 0x8000
|
||||
#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \
|
||||
TSC2005_CFR0_CLOCK_1MHZ | \
|
||||
TSC2005_CFR0_RESOLUTION12 | \
|
||||
TSC2005_CFR0_PRECHARGE_276US | \
|
||||
TSC2005_CFR0_PENMODE)
|
||||
|
||||
/* bits common to both read and write of configuration register 0 */
|
||||
#define TSC2005_CFR0_RW_MASK 0x3fff
|
||||
|
||||
/* configuration register 1 */
|
||||
#define TSC2005_CFR1_BATCHDELAY_4MS 0x0003
|
||||
#define TSC2005_CFR1_INITVALUE TSC2005_CFR1_BATCHDELAY_4MS
|
||||
|
||||
/* configuration register 2 */
|
||||
#define TSC2005_CFR2_MAVE_Z 0x0004
|
||||
#define TSC2005_CFR2_MAVE_Y 0x0008
|
||||
#define TSC2005_CFR2_MAVE_X 0x0010
|
||||
#define TSC2005_CFR2_AVG_7 0x0800
|
||||
#define TSC2005_CFR2_MEDIUM_15 0x3000
|
||||
#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_MAVE_X | \
|
||||
TSC2005_CFR2_MAVE_Y | \
|
||||
TSC2005_CFR2_MAVE_Z | \
|
||||
TSC2005_CFR2_MEDIUM_15 | \
|
||||
TSC2005_CFR2_AVG_7)
|
||||
|
||||
#define MAX_12BIT 0xfff
|
||||
#define TSC2005_DEF_X_FUZZ 4
|
||||
#define TSC2005_DEF_Y_FUZZ 8
|
||||
#define TSC2005_DEF_P_FUZZ 2
|
||||
#define TSC2005_DEF_RESISTOR 280
|
||||
|
||||
#define TSC2005_SPI_MAX_SPEED_HZ 10000000
|
||||
#define TSC2005_PENUP_TIME_MS 40
|
||||
|
||||
static const struct regmap_range tsc2005_writable_ranges[] = {
|
||||
regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
|
||||
};
|
||||
|
||||
static const struct regmap_access_table tsc2005_writable_table = {
|
||||
.yes_ranges = tsc2005_writable_ranges,
|
||||
.n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
|
||||
};
|
||||
|
||||
static struct regmap_config tsc2005_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 16,
|
||||
.reg_stride = 0x08,
|
||||
.max_register = 0x78,
|
||||
.read_flag_mask = TSC2005_REG_READ,
|
||||
.write_flag_mask = TSC2005_REG_PND0,
|
||||
.wr_table = &tsc2005_writable_table,
|
||||
.use_single_rw = true,
|
||||
};
|
||||
|
||||
struct tsc2005_data {
|
||||
u16 x;
|
||||
u16 y;
|
||||
u16 z1;
|
||||
u16 z2;
|
||||
} __packed;
|
||||
#define TSC2005_DATA_REGS 4
|
||||
|
||||
struct tsc2005 {
|
||||
struct spi_device *spi;
|
||||
struct regmap *regmap;
|
||||
|
||||
struct input_dev *idev;
|
||||
char phys[32];
|
||||
|
||||
struct mutex mutex;
|
||||
|
||||
/* raw copy of previous x,y,z */
|
||||
int in_x;
|
||||
int in_y;
|
||||
int in_z1;
|
||||
int in_z2;
|
||||
|
||||
spinlock_t lock;
|
||||
struct timer_list penup_timer;
|
||||
|
||||
unsigned int esd_timeout;
|
||||
struct delayed_work esd_work;
|
||||
unsigned long last_valid_interrupt;
|
||||
|
||||
unsigned int x_plate_ohm;
|
||||
|
||||
bool opened;
|
||||
bool suspended;
|
||||
|
||||
bool pen_down;
|
||||
|
||||
struct regulator *vio;
|
||||
|
||||
struct gpio_desc *reset_gpio;
|
||||
void (*set_reset)(bool enable);
|
||||
};
|
||||
|
||||
static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
|
||||
static int tsc2005_cmd(struct device *dev, u8 cmd)
|
||||
{
|
||||
u8 tx = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
|
||||
u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
|
||||
struct spi_transfer xfer = {
|
||||
.tx_buf = &tx,
|
||||
.len = 1,
|
||||
.bits_per_word = 8,
|
||||
};
|
||||
struct spi_message msg;
|
||||
struct spi_device *spi = to_spi_device(dev);
|
||||
int error;
|
||||
|
||||
spi_message_init(&msg);
|
||||
spi_message_add_tail(&xfer, &msg);
|
||||
|
||||
error = spi_sync(ts->spi, &msg);
|
||||
error = spi_sync(spi, &msg);
|
||||
if (error) {
|
||||
dev_err(&ts->spi->dev, "%s: failed, command: %x, error: %d\n",
|
||||
dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
|
||||
__func__, cmd, error);
|
||||
return error;
|
||||
}
|
||||
|
@ -208,382 +49,10 @@ static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void tsc2005_update_pen_state(struct tsc2005 *ts,
|
||||
int x, int y, int pressure)
|
||||
{
|
||||
if (pressure) {
|
||||
input_report_abs(ts->idev, ABS_X, x);
|
||||
input_report_abs(ts->idev, ABS_Y, y);
|
||||
input_report_abs(ts->idev, ABS_PRESSURE, pressure);
|
||||
if (!ts->pen_down) {
|
||||
input_report_key(ts->idev, BTN_TOUCH, !!pressure);
|
||||
ts->pen_down = true;
|
||||
}
|
||||
} else {
|
||||
input_report_abs(ts->idev, ABS_PRESSURE, 0);
|
||||
if (ts->pen_down) {
|
||||
input_report_key(ts->idev, BTN_TOUCH, 0);
|
||||
ts->pen_down = false;
|
||||
}
|
||||
}
|
||||
input_sync(ts->idev);
|
||||
dev_dbg(&ts->spi->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
|
||||
pressure);
|
||||
}
|
||||
|
||||
static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
|
||||
{
|
||||
struct tsc2005 *ts = _ts;
|
||||
unsigned long flags;
|
||||
unsigned int pressure;
|
||||
struct tsc2005_data tsdata;
|
||||
int error;
|
||||
|
||||
/* read the coordinates */
|
||||
error = regmap_bulk_read(ts->regmap, TSC2005_REG_X, &tsdata,
|
||||
TSC2005_DATA_REGS);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
|
||||
/* validate position */
|
||||
if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT))
|
||||
goto out;
|
||||
|
||||
/* Skip reading if the pressure components are out of range */
|
||||
if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT))
|
||||
goto out;
|
||||
if (unlikely(tsdata.z1 >= tsdata.z2))
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Skip point if this is a pen down with the exact same values as
|
||||
* the value before pen-up - that implies SPI fed us stale data
|
||||
*/
|
||||
if (!ts->pen_down &&
|
||||
ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
|
||||
ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* At this point we are happy we have a valid and useful reading.
|
||||
* Remember it for later comparisons. We may now begin downsampling.
|
||||
*/
|
||||
ts->in_x = tsdata.x;
|
||||
ts->in_y = tsdata.y;
|
||||
ts->in_z1 = tsdata.z1;
|
||||
ts->in_z2 = tsdata.z2;
|
||||
|
||||
/* Compute touch pressure resistance using equation #1 */
|
||||
pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
|
||||
pressure = pressure * ts->x_plate_ohm / 4096;
|
||||
if (unlikely(pressure > MAX_12BIT))
|
||||
goto out;
|
||||
|
||||
spin_lock_irqsave(&ts->lock, flags);
|
||||
|
||||
tsc2005_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
|
||||
mod_timer(&ts->penup_timer,
|
||||
jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
|
||||
|
||||
spin_unlock_irqrestore(&ts->lock, flags);
|
||||
|
||||
ts->last_valid_interrupt = jiffies;
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void tsc2005_penup_timer(unsigned long data)
|
||||
{
|
||||
struct tsc2005 *ts = (struct tsc2005 *)data;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&ts->lock, flags);
|
||||
tsc2005_update_pen_state(ts, 0, 0, 0);
|
||||
spin_unlock_irqrestore(&ts->lock, flags);
|
||||
}
|
||||
|
||||
static void tsc2005_start_scan(struct tsc2005 *ts)
|
||||
{
|
||||
regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
|
||||
regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
|
||||
regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
|
||||
tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
|
||||
}
|
||||
|
||||
static void tsc2005_stop_scan(struct tsc2005 *ts)
|
||||
{
|
||||
tsc2005_cmd(ts, TSC2005_CMD_STOP);
|
||||
}
|
||||
|
||||
static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
|
||||
{
|
||||
if (ts->reset_gpio)
|
||||
gpiod_set_value_cansleep(ts->reset_gpio, enable);
|
||||
else if (ts->set_reset)
|
||||
ts->set_reset(enable);
|
||||
}
|
||||
|
||||
/* must be called with ts->mutex held */
|
||||
static void __tsc2005_disable(struct tsc2005 *ts)
|
||||
{
|
||||
tsc2005_stop_scan(ts);
|
||||
|
||||
disable_irq(ts->spi->irq);
|
||||
del_timer_sync(&ts->penup_timer);
|
||||
|
||||
cancel_delayed_work_sync(&ts->esd_work);
|
||||
|
||||
enable_irq(ts->spi->irq);
|
||||
}
|
||||
|
||||
/* must be called with ts->mutex held */
|
||||
static void __tsc2005_enable(struct tsc2005 *ts)
|
||||
{
|
||||
tsc2005_start_scan(ts);
|
||||
|
||||
if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {
|
||||
ts->last_valid_interrupt = jiffies;
|
||||
schedule_delayed_work(&ts->esd_work,
|
||||
round_jiffies_relative(
|
||||
msecs_to_jiffies(ts->esd_timeout)));
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static ssize_t tsc2005_selftest_show(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct tsc2005 *ts = dev_get_drvdata(dev);
|
||||
unsigned int temp_high;
|
||||
unsigned int temp_high_orig;
|
||||
unsigned int temp_high_test;
|
||||
bool success = true;
|
||||
int error;
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
/*
|
||||
* Test TSC2005 communications via temp high register.
|
||||
*/
|
||||
__tsc2005_disable(ts);
|
||||
|
||||
error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d\n", error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
|
||||
|
||||
error = regmap_write(ts->regmap, TSC2005_REG_TEMP_HIGH, temp_high_test);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: write error %d\n", error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d after write\n",
|
||||
error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (temp_high != temp_high_test) {
|
||||
dev_warn(dev, "selftest failed: %d != %d\n",
|
||||
temp_high, temp_high_test);
|
||||
success = false;
|
||||
}
|
||||
|
||||
/* hardware reset */
|
||||
tsc2005_set_reset(ts, false);
|
||||
usleep_range(100, 500); /* only 10us required */
|
||||
tsc2005_set_reset(ts, true);
|
||||
|
||||
if (!success)
|
||||
goto out;
|
||||
|
||||
/* test that the reset really happened */
|
||||
error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d after reset\n",
|
||||
error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (temp_high != temp_high_orig) {
|
||||
dev_warn(dev, "selftest failed after reset: %d != %d\n",
|
||||
temp_high, temp_high_orig);
|
||||
success = false;
|
||||
}
|
||||
|
||||
out:
|
||||
__tsc2005_enable(ts);
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return sprintf(buf, "%d\n", success);
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
|
||||
|
||||
static struct attribute *tsc2005_attrs[] = {
|
||||
&dev_attr_selftest.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
|
||||
struct attribute *attr, int n)
|
||||
{
|
||||
struct device *dev = container_of(kobj, struct device, kobj);
|
||||
struct tsc2005 *ts = dev_get_drvdata(dev);
|
||||
umode_t mode = attr->mode;
|
||||
|
||||
if (attr == &dev_attr_selftest.attr) {
|
||||
if (!ts->set_reset && !ts->reset_gpio)
|
||||
mode = 0;
|
||||
}
|
||||
|
||||
return mode;
|
||||
}
|
||||
|
||||
static const struct attribute_group tsc2005_attr_group = {
|
||||
.is_visible = tsc2005_attr_is_visible,
|
||||
.attrs = tsc2005_attrs,
|
||||
};
|
||||
|
||||
static void tsc2005_esd_work(struct work_struct *work)
|
||||
{
|
||||
struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);
|
||||
int error;
|
||||
unsigned int r;
|
||||
|
||||
if (!mutex_trylock(&ts->mutex)) {
|
||||
/*
|
||||
* If the mutex is taken, it means that disable or enable is in
|
||||
* progress. In that case just reschedule the work. If the work
|
||||
* is not needed, it will be canceled by disable.
|
||||
*/
|
||||
goto reschedule;
|
||||
}
|
||||
|
||||
if (time_is_after_jiffies(ts->last_valid_interrupt +
|
||||
msecs_to_jiffies(ts->esd_timeout)))
|
||||
goto out;
|
||||
|
||||
/* We should be able to read register without disabling interrupts. */
|
||||
error = regmap_read(ts->regmap, TSC2005_REG_CFR0, &r);
|
||||
if (!error &&
|
||||
!((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK)) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we could not read our known value from configuration register 0
|
||||
* then we should reset the controller as if from power-up and start
|
||||
* scanning again.
|
||||
*/
|
||||
dev_info(&ts->spi->dev, "TSC2005 not responding - resetting\n");
|
||||
|
||||
disable_irq(ts->spi->irq);
|
||||
del_timer_sync(&ts->penup_timer);
|
||||
|
||||
tsc2005_update_pen_state(ts, 0, 0, 0);
|
||||
|
||||
tsc2005_set_reset(ts, false);
|
||||
usleep_range(100, 500); /* only 10us required */
|
||||
tsc2005_set_reset(ts, true);
|
||||
|
||||
enable_irq(ts->spi->irq);
|
||||
tsc2005_start_scan(ts);
|
||||
|
||||
out:
|
||||
mutex_unlock(&ts->mutex);
|
||||
reschedule:
|
||||
/* re-arm the watchdog */
|
||||
schedule_delayed_work(&ts->esd_work,
|
||||
round_jiffies_relative(
|
||||
msecs_to_jiffies(ts->esd_timeout)));
|
||||
}
|
||||
|
||||
static int tsc2005_open(struct input_dev *input)
|
||||
{
|
||||
struct tsc2005 *ts = input_get_drvdata(input);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended)
|
||||
__tsc2005_enable(ts);
|
||||
|
||||
ts->opened = true;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tsc2005_close(struct input_dev *input)
|
||||
{
|
||||
struct tsc2005 *ts = input_get_drvdata(input);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended)
|
||||
__tsc2005_disable(ts);
|
||||
|
||||
ts->opened = false;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
}
|
||||
|
||||
static int tsc2005_probe(struct spi_device *spi)
|
||||
{
|
||||
const struct tsc2005_platform_data *pdata = dev_get_platdata(&spi->dev);
|
||||
struct device_node *np = spi->dev.of_node;
|
||||
|
||||
struct tsc2005 *ts;
|
||||
struct input_dev *input_dev;
|
||||
unsigned int max_x = MAX_12BIT;
|
||||
unsigned int max_y = MAX_12BIT;
|
||||
unsigned int max_p = MAX_12BIT;
|
||||
unsigned int fudge_x = TSC2005_DEF_X_FUZZ;
|
||||
unsigned int fudge_y = TSC2005_DEF_Y_FUZZ;
|
||||
unsigned int fudge_p = TSC2005_DEF_P_FUZZ;
|
||||
unsigned int x_plate_ohm = TSC2005_DEF_RESISTOR;
|
||||
unsigned int esd_timeout;
|
||||
int error;
|
||||
|
||||
if (!np && !pdata) {
|
||||
dev_err(&spi->dev, "no platform data\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (spi->irq <= 0) {
|
||||
dev_err(&spi->dev, "no irq\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (pdata) {
|
||||
fudge_x = pdata->ts_x_fudge;
|
||||
fudge_y = pdata->ts_y_fudge;
|
||||
fudge_p = pdata->ts_pressure_fudge;
|
||||
max_x = pdata->ts_x_max;
|
||||
max_y = pdata->ts_y_max;
|
||||
max_p = pdata->ts_pressure_max;
|
||||
x_plate_ohm = pdata->ts_x_plate_ohm;
|
||||
esd_timeout = pdata->esd_timeout_ms;
|
||||
} else {
|
||||
x_plate_ohm = TSC2005_DEF_RESISTOR;
|
||||
of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
|
||||
esd_timeout = 0;
|
||||
of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
|
||||
&esd_timeout);
|
||||
}
|
||||
|
||||
spi->mode = SPI_MODE_0;
|
||||
spi->bits_per_word = 8;
|
||||
if (!spi->max_speed_hz)
|
||||
|
@ -593,175 +62,28 @@ static int tsc2005_probe(struct spi_device *spi)
|
|||
if (error)
|
||||
return error;
|
||||
|
||||
ts = devm_kzalloc(&spi->dev, sizeof(*ts), GFP_KERNEL);
|
||||
if (!ts)
|
||||
return -ENOMEM;
|
||||
|
||||
input_dev = devm_input_allocate_device(&spi->dev);
|
||||
if (!input_dev)
|
||||
return -ENOMEM;
|
||||
|
||||
ts->spi = spi;
|
||||
ts->idev = input_dev;
|
||||
|
||||
ts->regmap = devm_regmap_init_spi(spi, &tsc2005_regmap_config);
|
||||
if (IS_ERR(ts->regmap))
|
||||
return PTR_ERR(ts->regmap);
|
||||
|
||||
ts->x_plate_ohm = x_plate_ohm;
|
||||
ts->esd_timeout = esd_timeout;
|
||||
|
||||
ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
|
||||
GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ts->reset_gpio)) {
|
||||
error = PTR_ERR(ts->reset_gpio);
|
||||
dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
|
||||
if (IS_ERR(ts->vio)) {
|
||||
error = PTR_ERR(ts->vio);
|
||||
dev_err(&spi->dev, "vio regulator missing (%d)", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
if (!ts->reset_gpio && pdata)
|
||||
ts->set_reset = pdata->set_reset;
|
||||
|
||||
mutex_init(&ts->mutex);
|
||||
|
||||
spin_lock_init(&ts->lock);
|
||||
setup_timer(&ts->penup_timer, tsc2005_penup_timer, (unsigned long)ts);
|
||||
|
||||
INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
|
||||
|
||||
snprintf(ts->phys, sizeof(ts->phys),
|
||||
"%s/input-ts", dev_name(&spi->dev));
|
||||
|
||||
input_dev->name = "TSC2005 touchscreen";
|
||||
input_dev->phys = ts->phys;
|
||||
input_dev->id.bustype = BUS_SPI;
|
||||
input_dev->dev.parent = &spi->dev;
|
||||
input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
|
||||
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
|
||||
|
||||
input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
|
||||
input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
|
||||
input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
|
||||
|
||||
if (np)
|
||||
touchscreen_parse_properties(input_dev, false);
|
||||
|
||||
input_dev->open = tsc2005_open;
|
||||
input_dev->close = tsc2005_close;
|
||||
|
||||
input_set_drvdata(input_dev, ts);
|
||||
|
||||
/* Ensure the touchscreen is off */
|
||||
tsc2005_stop_scan(ts);
|
||||
|
||||
error = devm_request_threaded_irq(&spi->dev, spi->irq, NULL,
|
||||
tsc2005_irq_thread,
|
||||
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
||||
"tsc2005", ts);
|
||||
if (error) {
|
||||
dev_err(&spi->dev, "Failed to request irq, err: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
/* enable regulator for DT */
|
||||
if (ts->vio) {
|
||||
error = regulator_enable(ts->vio);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
dev_set_drvdata(&spi->dev, ts);
|
||||
error = sysfs_create_group(&spi->dev.kobj, &tsc2005_attr_group);
|
||||
if (error) {
|
||||
dev_err(&spi->dev,
|
||||
"Failed to create sysfs attributes, err: %d\n", error);
|
||||
goto disable_regulator;
|
||||
}
|
||||
|
||||
error = input_register_device(ts->idev);
|
||||
if (error) {
|
||||
dev_err(&spi->dev,
|
||||
"Failed to register input device, err: %d\n", error);
|
||||
goto err_remove_sysfs;
|
||||
}
|
||||
|
||||
irq_set_irq_wake(spi->irq, 1);
|
||||
return 0;
|
||||
|
||||
err_remove_sysfs:
|
||||
sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
|
||||
disable_regulator:
|
||||
if (ts->vio)
|
||||
regulator_disable(ts->vio);
|
||||
return error;
|
||||
return tsc200x_probe(&spi->dev, spi->irq, BUS_SPI,
|
||||
devm_regmap_init_spi(spi, &tsc200x_regmap_config),
|
||||
tsc2005_cmd);
|
||||
}
|
||||
|
||||
static int tsc2005_remove(struct spi_device *spi)
|
||||
{
|
||||
struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
|
||||
|
||||
sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
|
||||
|
||||
if (ts->vio)
|
||||
regulator_disable(ts->vio);
|
||||
|
||||
return 0;
|
||||
return tsc200x_remove(&spi->dev);
|
||||
}
|
||||
|
||||
static int __maybe_unused tsc2005_suspend(struct device *dev)
|
||||
{
|
||||
struct tsc2005 *ts = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended && ts->opened)
|
||||
__tsc2005_disable(ts);
|
||||
|
||||
ts->suspended = true;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused tsc2005_resume(struct device *dev)
|
||||
{
|
||||
struct tsc2005 *ts = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (ts->suspended && ts->opened)
|
||||
__tsc2005_enable(ts);
|
||||
|
||||
ts->suspended = false;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(tsc2005_pm_ops, tsc2005_suspend, tsc2005_resume);
|
||||
|
||||
static struct spi_driver tsc2005_driver = {
|
||||
.driver = {
|
||||
.name = "tsc2005",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &tsc2005_pm_ops,
|
||||
.pm = &tsc200x_pm_ops,
|
||||
},
|
||||
.probe = tsc2005_probe,
|
||||
.remove = tsc2005_remove,
|
||||
};
|
||||
|
||||
module_spi_driver(tsc2005_driver);
|
||||
|
||||
MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
|
||||
MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
|
||||
MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("spi:tsc2005");
|
||||
|
|
|
@ -0,0 +1,665 @@
|
|||
/*
|
||||
* TSC2004/TSC2005 touchscreen driver core
|
||||
*
|
||||
* Copyright (C) 2006-2010 Nokia Corporation
|
||||
* Copyright (C) 2015 QWERTY Embedded Design
|
||||
* Copyright (C) 2015 EMAC Inc.
|
||||
*
|
||||
* Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
|
||||
* based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/input/touchscreen.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/spi/tsc2005.h>
|
||||
#include <linux/regulator/consumer.h>
|
||||
#include <linux/regmap.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include "tsc200x-core.h"
|
||||
|
||||
/*
|
||||
* The touchscreen interface operates as follows:
|
||||
*
|
||||
* 1) Pen is pressed against the touchscreen.
|
||||
* 2) TSC200X performs AD conversion.
|
||||
* 3) After the conversion is done TSC200X drives DAV line down.
|
||||
* 4) GPIO IRQ is received and tsc200x_irq_thread() is scheduled.
|
||||
* 5) tsc200x_irq_thread() queues up a transfer to fetch the x, y, z1, z2
|
||||
* values.
|
||||
* 6) tsc200x_irq_thread() reports coordinates to input layer and sets up
|
||||
* tsc200x_penup_timer() to be called after TSC200X_PENUP_TIME_MS (40ms).
|
||||
* 7) When the penup timer expires, there have not been touch or DAV interrupts
|
||||
* during the last 40ms which means the pen has been lifted.
|
||||
*
|
||||
* ESD recovery via a hardware reset is done if the TSC200X doesn't respond
|
||||
* after a configurable period (in ms) of activity. If esd_timeout is 0, the
|
||||
* watchdog is disabled.
|
||||
*/
|
||||
|
||||
static const struct regmap_range tsc200x_writable_ranges[] = {
|
||||
regmap_reg_range(TSC200X_REG_AUX_HIGH, TSC200X_REG_CFR2),
|
||||
};
|
||||
|
||||
static const struct regmap_access_table tsc200x_writable_table = {
|
||||
.yes_ranges = tsc200x_writable_ranges,
|
||||
.n_yes_ranges = ARRAY_SIZE(tsc200x_writable_ranges),
|
||||
};
|
||||
|
||||
const struct regmap_config tsc200x_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 16,
|
||||
.reg_stride = 0x08,
|
||||
.max_register = 0x78,
|
||||
.read_flag_mask = TSC200X_REG_READ,
|
||||
.write_flag_mask = TSC200X_REG_PND0,
|
||||
.wr_table = &tsc200x_writable_table,
|
||||
.use_single_rw = true,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(tsc200x_regmap_config);
|
||||
|
||||
struct tsc200x_data {
|
||||
u16 x;
|
||||
u16 y;
|
||||
u16 z1;
|
||||
u16 z2;
|
||||
} __packed;
|
||||
#define TSC200X_DATA_REGS 4
|
||||
|
||||
struct tsc200x {
|
||||
struct device *dev;
|
||||
struct regmap *regmap;
|
||||
__u16 bustype;
|
||||
|
||||
struct input_dev *idev;
|
||||
char phys[32];
|
||||
|
||||
struct mutex mutex;
|
||||
|
||||
/* raw copy of previous x,y,z */
|
||||
int in_x;
|
||||
int in_y;
|
||||
int in_z1;
|
||||
int in_z2;
|
||||
|
||||
spinlock_t lock;
|
||||
struct timer_list penup_timer;
|
||||
|
||||
unsigned int esd_timeout;
|
||||
struct delayed_work esd_work;
|
||||
unsigned long last_valid_interrupt;
|
||||
|
||||
unsigned int x_plate_ohm;
|
||||
|
||||
bool opened;
|
||||
bool suspended;
|
||||
|
||||
bool pen_down;
|
||||
|
||||
struct regulator *vio;
|
||||
|
||||
struct gpio_desc *reset_gpio;
|
||||
void (*set_reset)(bool enable);
|
||||
int (*tsc200x_cmd)(struct device *dev, u8 cmd);
|
||||
int irq;
|
||||
};
|
||||
|
||||
static void tsc200x_update_pen_state(struct tsc200x *ts,
|
||||
int x, int y, int pressure)
|
||||
{
|
||||
if (pressure) {
|
||||
input_report_abs(ts->idev, ABS_X, x);
|
||||
input_report_abs(ts->idev, ABS_Y, y);
|
||||
input_report_abs(ts->idev, ABS_PRESSURE, pressure);
|
||||
if (!ts->pen_down) {
|
||||
input_report_key(ts->idev, BTN_TOUCH, !!pressure);
|
||||
ts->pen_down = true;
|
||||
}
|
||||
} else {
|
||||
input_report_abs(ts->idev, ABS_PRESSURE, 0);
|
||||
if (ts->pen_down) {
|
||||
input_report_key(ts->idev, BTN_TOUCH, 0);
|
||||
ts->pen_down = false;
|
||||
}
|
||||
}
|
||||
input_sync(ts->idev);
|
||||
dev_dbg(ts->dev, "point(%4d,%4d), pressure (%4d)\n", x, y,
|
||||
pressure);
|
||||
}
|
||||
|
||||
static irqreturn_t tsc200x_irq_thread(int irq, void *_ts)
|
||||
{
|
||||
struct tsc200x *ts = _ts;
|
||||
unsigned long flags;
|
||||
unsigned int pressure;
|
||||
struct tsc200x_data tsdata;
|
||||
int error;
|
||||
|
||||
/* read the coordinates */
|
||||
error = regmap_bulk_read(ts->regmap, TSC200X_REG_X, &tsdata,
|
||||
TSC200X_DATA_REGS);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
|
||||
/* validate position */
|
||||
if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT))
|
||||
goto out;
|
||||
|
||||
/* Skip reading if the pressure components are out of range */
|
||||
if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT))
|
||||
goto out;
|
||||
if (unlikely(tsdata.z1 >= tsdata.z2))
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Skip point if this is a pen down with the exact same values as
|
||||
* the value before pen-up - that implies SPI fed us stale data
|
||||
*/
|
||||
if (!ts->pen_down &&
|
||||
ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
|
||||
ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* At this point we are happy we have a valid and useful reading.
|
||||
* Remember it for later comparisons. We may now begin downsampling.
|
||||
*/
|
||||
ts->in_x = tsdata.x;
|
||||
ts->in_y = tsdata.y;
|
||||
ts->in_z1 = tsdata.z1;
|
||||
ts->in_z2 = tsdata.z2;
|
||||
|
||||
/* Compute touch pressure resistance using equation #1 */
|
||||
pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
|
||||
pressure = pressure * ts->x_plate_ohm / 4096;
|
||||
if (unlikely(pressure > MAX_12BIT))
|
||||
goto out;
|
||||
|
||||
spin_lock_irqsave(&ts->lock, flags);
|
||||
|
||||
tsc200x_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
|
||||
mod_timer(&ts->penup_timer,
|
||||
jiffies + msecs_to_jiffies(TSC200X_PENUP_TIME_MS));
|
||||
|
||||
spin_unlock_irqrestore(&ts->lock, flags);
|
||||
|
||||
ts->last_valid_interrupt = jiffies;
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void tsc200x_penup_timer(unsigned long data)
|
||||
{
|
||||
struct tsc200x *ts = (struct tsc200x *)data;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&ts->lock, flags);
|
||||
tsc200x_update_pen_state(ts, 0, 0, 0);
|
||||
spin_unlock_irqrestore(&ts->lock, flags);
|
||||
}
|
||||
|
||||
static void tsc200x_start_scan(struct tsc200x *ts)
|
||||
{
|
||||
regmap_write(ts->regmap, TSC200X_REG_CFR0, TSC200X_CFR0_INITVALUE);
|
||||
regmap_write(ts->regmap, TSC200X_REG_CFR1, TSC200X_CFR1_INITVALUE);
|
||||
regmap_write(ts->regmap, TSC200X_REG_CFR2, TSC200X_CFR2_INITVALUE);
|
||||
ts->tsc200x_cmd(ts->dev, TSC200X_CMD_NORMAL);
|
||||
}
|
||||
|
||||
static void tsc200x_stop_scan(struct tsc200x *ts)
|
||||
{
|
||||
ts->tsc200x_cmd(ts->dev, TSC200X_CMD_STOP);
|
||||
}
|
||||
|
||||
static void tsc200x_set_reset(struct tsc200x *ts, bool enable)
|
||||
{
|
||||
if (ts->reset_gpio)
|
||||
gpiod_set_value_cansleep(ts->reset_gpio, enable);
|
||||
else if (ts->set_reset)
|
||||
ts->set_reset(enable);
|
||||
}
|
||||
|
||||
/* must be called with ts->mutex held */
|
||||
static void __tsc200x_disable(struct tsc200x *ts)
|
||||
{
|
||||
tsc200x_stop_scan(ts);
|
||||
|
||||
disable_irq(ts->irq);
|
||||
del_timer_sync(&ts->penup_timer);
|
||||
|
||||
cancel_delayed_work_sync(&ts->esd_work);
|
||||
|
||||
enable_irq(ts->irq);
|
||||
}
|
||||
|
||||
/* must be called with ts->mutex held */
|
||||
static void __tsc200x_enable(struct tsc200x *ts)
|
||||
{
|
||||
tsc200x_start_scan(ts);
|
||||
|
||||
if (ts->esd_timeout && (ts->set_reset || ts->reset_gpio)) {
|
||||
ts->last_valid_interrupt = jiffies;
|
||||
schedule_delayed_work(&ts->esd_work,
|
||||
round_jiffies_relative(
|
||||
msecs_to_jiffies(ts->esd_timeout)));
|
||||
}
|
||||
}
|
||||
|
||||
static ssize_t tsc200x_selftest_show(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct tsc200x *ts = dev_get_drvdata(dev);
|
||||
unsigned int temp_high;
|
||||
unsigned int temp_high_orig;
|
||||
unsigned int temp_high_test;
|
||||
bool success = true;
|
||||
int error;
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
/*
|
||||
* Test TSC200X communications via temp high register.
|
||||
*/
|
||||
__tsc200x_disable(ts);
|
||||
|
||||
error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high_orig);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d\n", error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
|
||||
|
||||
error = regmap_write(ts->regmap, TSC200X_REG_TEMP_HIGH, temp_high_test);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: write error %d\n", error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d after write\n",
|
||||
error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (temp_high != temp_high_test) {
|
||||
dev_warn(dev, "selftest failed: %d != %d\n",
|
||||
temp_high, temp_high_test);
|
||||
success = false;
|
||||
}
|
||||
|
||||
/* hardware reset */
|
||||
tsc200x_set_reset(ts, false);
|
||||
usleep_range(100, 500); /* only 10us required */
|
||||
tsc200x_set_reset(ts, true);
|
||||
|
||||
if (!success)
|
||||
goto out;
|
||||
|
||||
/* test that the reset really happened */
|
||||
error = regmap_read(ts->regmap, TSC200X_REG_TEMP_HIGH, &temp_high);
|
||||
if (error) {
|
||||
dev_warn(dev, "selftest failed: read error %d after reset\n",
|
||||
error);
|
||||
success = false;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (temp_high != temp_high_orig) {
|
||||
dev_warn(dev, "selftest failed after reset: %d != %d\n",
|
||||
temp_high, temp_high_orig);
|
||||
success = false;
|
||||
}
|
||||
|
||||
out:
|
||||
__tsc200x_enable(ts);
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return sprintf(buf, "%d\n", success);
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(selftest, S_IRUGO, tsc200x_selftest_show, NULL);
|
||||
|
||||
static struct attribute *tsc200x_attrs[] = {
|
||||
&dev_attr_selftest.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static umode_t tsc200x_attr_is_visible(struct kobject *kobj,
|
||||
struct attribute *attr, int n)
|
||||
{
|
||||
struct device *dev = container_of(kobj, struct device, kobj);
|
||||
struct tsc200x *ts = dev_get_drvdata(dev);
|
||||
umode_t mode = attr->mode;
|
||||
|
||||
if (attr == &dev_attr_selftest.attr) {
|
||||
if (!ts->set_reset && !ts->reset_gpio)
|
||||
mode = 0;
|
||||
}
|
||||
|
||||
return mode;
|
||||
}
|
||||
|
||||
static const struct attribute_group tsc200x_attr_group = {
|
||||
.is_visible = tsc200x_attr_is_visible,
|
||||
.attrs = tsc200x_attrs,
|
||||
};
|
||||
|
||||
static void tsc200x_esd_work(struct work_struct *work)
|
||||
{
|
||||
struct tsc200x *ts = container_of(work, struct tsc200x, esd_work.work);
|
||||
int error;
|
||||
unsigned int r;
|
||||
|
||||
if (!mutex_trylock(&ts->mutex)) {
|
||||
/*
|
||||
* If the mutex is taken, it means that disable or enable is in
|
||||
* progress. In that case just reschedule the work. If the work
|
||||
* is not needed, it will be canceled by disable.
|
||||
*/
|
||||
goto reschedule;
|
||||
}
|
||||
|
||||
if (time_is_after_jiffies(ts->last_valid_interrupt +
|
||||
msecs_to_jiffies(ts->esd_timeout)))
|
||||
goto out;
|
||||
|
||||
/* We should be able to read register without disabling interrupts. */
|
||||
error = regmap_read(ts->regmap, TSC200X_REG_CFR0, &r);
|
||||
if (!error &&
|
||||
!((r ^ TSC200X_CFR0_INITVALUE) & TSC200X_CFR0_RW_MASK)) {
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we could not read our known value from configuration register 0
|
||||
* then we should reset the controller as if from power-up and start
|
||||
* scanning again.
|
||||
*/
|
||||
dev_info(ts->dev, "TSC200X not responding - resetting\n");
|
||||
|
||||
disable_irq(ts->irq);
|
||||
del_timer_sync(&ts->penup_timer);
|
||||
|
||||
tsc200x_update_pen_state(ts, 0, 0, 0);
|
||||
|
||||
tsc200x_set_reset(ts, false);
|
||||
usleep_range(100, 500); /* only 10us required */
|
||||
tsc200x_set_reset(ts, true);
|
||||
|
||||
enable_irq(ts->irq);
|
||||
tsc200x_start_scan(ts);
|
||||
|
||||
out:
|
||||
mutex_unlock(&ts->mutex);
|
||||
reschedule:
|
||||
/* re-arm the watchdog */
|
||||
schedule_delayed_work(&ts->esd_work,
|
||||
round_jiffies_relative(
|
||||
msecs_to_jiffies(ts->esd_timeout)));
|
||||
}
|
||||
|
||||
static int tsc200x_open(struct input_dev *input)
|
||||
{
|
||||
struct tsc200x *ts = input_get_drvdata(input);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended)
|
||||
__tsc200x_enable(ts);
|
||||
|
||||
ts->opened = true;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tsc200x_close(struct input_dev *input)
|
||||
{
|
||||
struct tsc200x *ts = input_get_drvdata(input);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended)
|
||||
__tsc200x_disable(ts);
|
||||
|
||||
ts->opened = false;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
}
|
||||
|
||||
int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
|
||||
struct regmap *regmap,
|
||||
int (*tsc200x_cmd)(struct device *dev, u8 cmd))
|
||||
{
|
||||
const struct tsc2005_platform_data *pdata = dev_get_platdata(dev);
|
||||
struct device_node *np = dev->of_node;
|
||||
|
||||
struct tsc200x *ts;
|
||||
struct input_dev *input_dev;
|
||||
unsigned int max_x = MAX_12BIT;
|
||||
unsigned int max_y = MAX_12BIT;
|
||||
unsigned int max_p = MAX_12BIT;
|
||||
unsigned int fudge_x = TSC200X_DEF_X_FUZZ;
|
||||
unsigned int fudge_y = TSC200X_DEF_Y_FUZZ;
|
||||
unsigned int fudge_p = TSC200X_DEF_P_FUZZ;
|
||||
unsigned int x_plate_ohm = TSC200X_DEF_RESISTOR;
|
||||
unsigned int esd_timeout;
|
||||
int error;
|
||||
|
||||
if (!np && !pdata) {
|
||||
dev_err(dev, "no platform data\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (irq <= 0) {
|
||||
dev_err(dev, "no irq\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (IS_ERR(regmap))
|
||||
return PTR_ERR(regmap);
|
||||
|
||||
if (!tsc200x_cmd) {
|
||||
dev_err(dev, "no cmd function\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (pdata) {
|
||||
fudge_x = pdata->ts_x_fudge;
|
||||
fudge_y = pdata->ts_y_fudge;
|
||||
fudge_p = pdata->ts_pressure_fudge;
|
||||
max_x = pdata->ts_x_max;
|
||||
max_y = pdata->ts_y_max;
|
||||
max_p = pdata->ts_pressure_max;
|
||||
x_plate_ohm = pdata->ts_x_plate_ohm;
|
||||
esd_timeout = pdata->esd_timeout_ms;
|
||||
} else {
|
||||
x_plate_ohm = TSC200X_DEF_RESISTOR;
|
||||
of_property_read_u32(np, "ti,x-plate-ohms", &x_plate_ohm);
|
||||
esd_timeout = 0;
|
||||
of_property_read_u32(np, "ti,esd-recovery-timeout-ms",
|
||||
&esd_timeout);
|
||||
}
|
||||
|
||||
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
|
||||
if (!ts)
|
||||
return -ENOMEM;
|
||||
|
||||
input_dev = devm_input_allocate_device(dev);
|
||||
if (!input_dev)
|
||||
return -ENOMEM;
|
||||
|
||||
ts->irq = irq;
|
||||
ts->dev = dev;
|
||||
ts->idev = input_dev;
|
||||
ts->regmap = regmap;
|
||||
ts->tsc200x_cmd = tsc200x_cmd;
|
||||
ts->x_plate_ohm = x_plate_ohm;
|
||||
ts->esd_timeout = esd_timeout;
|
||||
|
||||
ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(ts->reset_gpio)) {
|
||||
error = PTR_ERR(ts->reset_gpio);
|
||||
dev_err(dev, "error acquiring reset gpio: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
ts->vio = devm_regulator_get_optional(dev, "vio");
|
||||
if (IS_ERR(ts->vio)) {
|
||||
error = PTR_ERR(ts->vio);
|
||||
dev_err(dev, "vio regulator missing (%d)", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
if (!ts->reset_gpio && pdata)
|
||||
ts->set_reset = pdata->set_reset;
|
||||
|
||||
mutex_init(&ts->mutex);
|
||||
|
||||
spin_lock_init(&ts->lock);
|
||||
setup_timer(&ts->penup_timer, tsc200x_penup_timer, (unsigned long)ts);
|
||||
|
||||
INIT_DELAYED_WORK(&ts->esd_work, tsc200x_esd_work);
|
||||
|
||||
snprintf(ts->phys, sizeof(ts->phys),
|
||||
"%s/input-ts", dev_name(dev));
|
||||
|
||||
input_dev->name = "TSC200X touchscreen";
|
||||
input_dev->phys = ts->phys;
|
||||
input_dev->id.bustype = bustype;
|
||||
input_dev->dev.parent = dev;
|
||||
input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
|
||||
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
|
||||
|
||||
input_set_abs_params(input_dev, ABS_X, 0, max_x, fudge_x, 0);
|
||||
input_set_abs_params(input_dev, ABS_Y, 0, max_y, fudge_y, 0);
|
||||
input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
|
||||
|
||||
if (np)
|
||||
touchscreen_parse_properties(input_dev, false);
|
||||
|
||||
input_dev->open = tsc200x_open;
|
||||
input_dev->close = tsc200x_close;
|
||||
|
||||
input_set_drvdata(input_dev, ts);
|
||||
|
||||
/* Ensure the touchscreen is off */
|
||||
tsc200x_stop_scan(ts);
|
||||
|
||||
error = devm_request_threaded_irq(dev, irq, NULL,
|
||||
tsc200x_irq_thread,
|
||||
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
||||
"tsc200x", ts);
|
||||
if (error) {
|
||||
dev_err(dev, "Failed to request irq, err: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
/* enable regulator for DT */
|
||||
if (ts->vio) {
|
||||
error = regulator_enable(ts->vio);
|
||||
if (error)
|
||||
return error;
|
||||
}
|
||||
|
||||
dev_set_drvdata(dev, ts);
|
||||
error = sysfs_create_group(&dev->kobj, &tsc200x_attr_group);
|
||||
if (error) {
|
||||
dev_err(dev,
|
||||
"Failed to create sysfs attributes, err: %d\n", error);
|
||||
goto disable_regulator;
|
||||
}
|
||||
|
||||
error = input_register_device(ts->idev);
|
||||
if (error) {
|
||||
dev_err(dev,
|
||||
"Failed to register input device, err: %d\n", error);
|
||||
goto err_remove_sysfs;
|
||||
}
|
||||
|
||||
irq_set_irq_wake(irq, 1);
|
||||
return 0;
|
||||
|
||||
err_remove_sysfs:
|
||||
sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
|
||||
disable_regulator:
|
||||
if (ts->vio)
|
||||
regulator_disable(ts->vio);
|
||||
return error;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tsc200x_probe);
|
||||
|
||||
int tsc200x_remove(struct device *dev)
|
||||
{
|
||||
struct tsc200x *ts = dev_get_drvdata(dev);
|
||||
|
||||
sysfs_remove_group(&dev->kobj, &tsc200x_attr_group);
|
||||
|
||||
if (ts->vio)
|
||||
regulator_disable(ts->vio);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tsc200x_remove);
|
||||
|
||||
static int __maybe_unused tsc200x_suspend(struct device *dev)
|
||||
{
|
||||
struct tsc200x *ts = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (!ts->suspended && ts->opened)
|
||||
__tsc200x_disable(ts);
|
||||
|
||||
ts->suspended = true;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused tsc200x_resume(struct device *dev)
|
||||
{
|
||||
struct tsc200x *ts = dev_get_drvdata(dev);
|
||||
|
||||
mutex_lock(&ts->mutex);
|
||||
|
||||
if (ts->suspended && ts->opened)
|
||||
__tsc200x_enable(ts);
|
||||
|
||||
ts->suspended = false;
|
||||
|
||||
mutex_unlock(&ts->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
SIMPLE_DEV_PM_OPS(tsc200x_pm_ops, tsc200x_suspend, tsc200x_resume);
|
||||
EXPORT_SYMBOL_GPL(tsc200x_pm_ops);
|
||||
|
||||
MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
|
||||
MODULE_DESCRIPTION("TSC200x Touchscreen Driver Core");
|
||||
MODULE_LICENSE("GPL");
|
|
@ -0,0 +1,78 @@
|
|||
#ifndef _TSC200X_CORE_H
|
||||
#define _TSC200X_CORE_H
|
||||
|
||||
/* control byte 1 */
|
||||
#define TSC200X_CMD 0x80
|
||||
#define TSC200X_CMD_NORMAL 0x00
|
||||
#define TSC200X_CMD_STOP 0x01
|
||||
#define TSC200X_CMD_12BIT 0x04
|
||||
|
||||
/* control byte 0 */
|
||||
#define TSC200X_REG_READ 0x01 /* R/W access */
|
||||
#define TSC200X_REG_PND0 0x02 /* Power Not Down Control */
|
||||
#define TSC200X_REG_X (0x0 << 3)
|
||||
#define TSC200X_REG_Y (0x1 << 3)
|
||||
#define TSC200X_REG_Z1 (0x2 << 3)
|
||||
#define TSC200X_REG_Z2 (0x3 << 3)
|
||||
#define TSC200X_REG_AUX (0x4 << 3)
|
||||
#define TSC200X_REG_TEMP1 (0x5 << 3)
|
||||
#define TSC200X_REG_TEMP2 (0x6 << 3)
|
||||
#define TSC200X_REG_STATUS (0x7 << 3)
|
||||
#define TSC200X_REG_AUX_HIGH (0x8 << 3)
|
||||
#define TSC200X_REG_AUX_LOW (0x9 << 3)
|
||||
#define TSC200X_REG_TEMP_HIGH (0xA << 3)
|
||||
#define TSC200X_REG_TEMP_LOW (0xB << 3)
|
||||
#define TSC200X_REG_CFR0 (0xC << 3)
|
||||
#define TSC200X_REG_CFR1 (0xD << 3)
|
||||
#define TSC200X_REG_CFR2 (0xE << 3)
|
||||
#define TSC200X_REG_CONV_FUNC (0xF << 3)
|
||||
|
||||
/* configuration register 0 */
|
||||
#define TSC200X_CFR0_PRECHARGE_276US 0x0040
|
||||
#define TSC200X_CFR0_STABTIME_1MS 0x0300
|
||||
#define TSC200X_CFR0_CLOCK_1MHZ 0x1000
|
||||
#define TSC200X_CFR0_RESOLUTION12 0x2000
|
||||
#define TSC200X_CFR0_PENMODE 0x8000
|
||||
#define TSC200X_CFR0_INITVALUE (TSC200X_CFR0_STABTIME_1MS | \
|
||||
TSC200X_CFR0_CLOCK_1MHZ | \
|
||||
TSC200X_CFR0_RESOLUTION12 | \
|
||||
TSC200X_CFR0_PRECHARGE_276US | \
|
||||
TSC200X_CFR0_PENMODE)
|
||||
|
||||
/* bits common to both read and write of configuration register 0 */
|
||||
#define TSC200X_CFR0_RW_MASK 0x3fff
|
||||
|
||||
/* configuration register 1 */
|
||||
#define TSC200X_CFR1_BATCHDELAY_4MS 0x0003
|
||||
#define TSC200X_CFR1_INITVALUE TSC200X_CFR1_BATCHDELAY_4MS
|
||||
|
||||
/* configuration register 2 */
|
||||
#define TSC200X_CFR2_MAVE_Z 0x0004
|
||||
#define TSC200X_CFR2_MAVE_Y 0x0008
|
||||
#define TSC200X_CFR2_MAVE_X 0x0010
|
||||
#define TSC200X_CFR2_AVG_7 0x0800
|
||||
#define TSC200X_CFR2_MEDIUM_15 0x3000
|
||||
#define TSC200X_CFR2_INITVALUE (TSC200X_CFR2_MAVE_X | \
|
||||
TSC200X_CFR2_MAVE_Y | \
|
||||
TSC200X_CFR2_MAVE_Z | \
|
||||
TSC200X_CFR2_MEDIUM_15 | \
|
||||
TSC200X_CFR2_AVG_7)
|
||||
|
||||
#define MAX_12BIT 0xfff
|
||||
#define TSC200X_DEF_X_FUZZ 4
|
||||
#define TSC200X_DEF_Y_FUZZ 8
|
||||
#define TSC200X_DEF_P_FUZZ 2
|
||||
#define TSC200X_DEF_RESISTOR 280
|
||||
|
||||
#define TSC2005_SPI_MAX_SPEED_HZ 10000000
|
||||
#define TSC200X_PENUP_TIME_MS 40
|
||||
|
||||
extern const struct regmap_config tsc200x_regmap_config;
|
||||
extern const struct dev_pm_ops tsc200x_pm_ops;
|
||||
|
||||
int tsc200x_probe(struct device *dev, int irq, __u16 bustype,
|
||||
struct regmap *regmap,
|
||||
int (*tsc200x_cmd)(struct device *dev, u8 cmd));
|
||||
int tsc200x_remove(struct device *dev);
|
||||
|
||||
#endif
|
Loading…
Reference in New Issue