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-rw-r--r--drivers/input/touchscreen/Kconfig26
-rw-r--r--drivers/input/touchscreen/Makefile2
-rw-r--r--drivers/input/touchscreen/ad7879-i2c.c10
-rw-r--r--drivers/input/touchscreen/ad7879-spi.c10
-rw-r--r--drivers/input/touchscreen/ad7879.c160
-rw-r--r--drivers/input/touchscreen/cyttsp_core.c194
-rw-r--r--drivers/input/touchscreen/cyttsp_core.h10
-rw-r--r--drivers/input/touchscreen/cyttsp_i2c.c10
-rw-r--r--drivers/input/touchscreen/cyttsp_spi.c10
-rw-r--r--drivers/input/touchscreen/fsl-imx25-tcq.c596
-rw-r--r--drivers/input/touchscreen/melfas_mip4.c1543
-rw-r--r--drivers/input/touchscreen/stmpe-ts.c31
-rw-r--r--drivers/input/touchscreen/sur40.c21
-rw-r--r--drivers/input/touchscreen/wdt87xx_i2c.c2
14 files changed, 2463 insertions, 162 deletions
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 66c62641b59a..8ecdc38fd489 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -334,7 +334,7 @@ config TOUCHSCREEN_FUJITSU
config TOUCHSCREEN_GOODIX
tristate "Goodix I2C touchscreen"
depends on I2C
- depends on GPIOLIB
+ depends on GPIOLIB || COMPILE_TEST
help
Say Y here if you have the Goodix touchscreen (such as one
installed in Onda v975w tablets) connected to your
@@ -491,6 +491,17 @@ config TOUCHSCREEN_MMS114
To compile this driver as a module, choose M here: the
module will be called mms114.
+config TOUCHSCREEN_MELFAS_MIP4
+ tristate "MELFAS MIP4 Touchscreen"
+ depends on I2C
+ help
+ Say Y here if you have a MELFAS MIP4 Touchscreen device.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here:
+ the module will be called melfas_mip4.
+
config TOUCHSCREEN_MTOUCH
tristate "MicroTouch serial touchscreens"
select SERIO
@@ -822,6 +833,15 @@ config TOUCHSCREEN_USB_COMPOSITE
To compile this driver as a module, choose M here: the
module will be called usbtouchscreen.
+config TOUCHSCREEN_MX25
+ tristate "Freescale i.MX25 touchscreen input driver"
+ depends on MFD_MX25_TSADC
+ help
+ Enable support for touchscreen connected to your i.MX25.
+
+ To compile this driver as a module, choose M here: the
+ module will be called fsl-imx25-tcq.
+
config TOUCHSCREEN_MC13783
tristate "Freescale MC13783 touchscreen input driver"
depends on MFD_MC13XXX
@@ -941,6 +961,7 @@ config TOUCHSCREEN_TOUCHIT213
config TOUCHSCREEN_TS4800
tristate "TS-4800 touchscreen"
depends on HAS_IOMEM && OF
+ depends on SOC_IMX51 || COMPILE_TEST
select MFD_SYSCON
select INPUT_POLLDEV
help
@@ -1112,7 +1133,8 @@ config TOUCHSCREEN_ZFORCE
config TOUCHSCREEN_COLIBRI_VF50
tristate "Toradex Colibri on board touchscreen driver"
- depends on GPIOLIB && IIO && VF610_ADC
+ depends on IIO && VF610_ADC
+ depends on GPIOLIB || COMPILE_TEST
help
Say Y here if you have a Colibri VF50 and plan to use
the on-board provided 4-wire touchscreen driver.
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 968ff12e3132..f42975e719e0 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -46,8 +46,10 @@ obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o
obj-$(CONFIG_TOUCHSCREEN_IPROC) += bcm_iproc_tsc.o
obj-$(CONFIG_TOUCHSCREEN_LPC32XX) += lpc32xx_ts.o
obj-$(CONFIG_TOUCHSCREEN_MAX11801) += max11801_ts.o
+obj-$(CONFIG_TOUCHSCREEN_MX25) += fsl-imx25-tcq.o
obj-$(CONFIG_TOUCHSCREEN_MC13783) += mc13783_ts.o
obj-$(CONFIG_TOUCHSCREEN_MCS5000) += mcs5000_ts.o
+obj-$(CONFIG_TOUCHSCREEN_MELFAS_MIP4) += melfas_mip4.o
obj-$(CONFIG_TOUCHSCREEN_MIGOR) += migor_ts.o
obj-$(CONFIG_TOUCHSCREEN_MMS114) += mms114.o
obj-$(CONFIG_TOUCHSCREEN_MTOUCH) += mtouch.o
diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c
index d66962c5b1c2..58f72e0246ab 100644
--- a/drivers/input/touchscreen/ad7879-i2c.c
+++ b/drivers/input/touchscreen/ad7879-i2c.c
@@ -10,6 +10,7 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/of.h>
#include <linux/pm.h>
#include "ad7879.h"
@@ -91,10 +92,19 @@ static const struct i2c_device_id ad7879_id[] = {
};
MODULE_DEVICE_TABLE(i2c, ad7879_id);
+#ifdef CONFIG_OF
+static const struct of_device_id ad7879_i2c_dt_ids[] = {
+ { .compatible = "adi,ad7879-1", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ad7879_i2c_dt_ids);
+#endif
+
static struct i2c_driver ad7879_i2c_driver = {
.driver = {
.name = "ad7879",
.pm = &ad7879_pm_ops,
+ .of_match_table = of_match_ptr(ad7879_i2c_dt_ids),
},
.probe = ad7879_i2c_probe,
.remove = ad7879_i2c_remove,
diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c
index 48033c2689ab..d42b6b9af191 100644
--- a/drivers/input/touchscreen/ad7879-spi.c
+++ b/drivers/input/touchscreen/ad7879-spi.c
@@ -10,6 +10,7 @@
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/module.h>
+#include <linux/of.h>
#include "ad7879.h"
@@ -146,10 +147,19 @@ static int ad7879_spi_remove(struct spi_device *spi)
return 0;
}
+#ifdef CONFIG_OF
+static const struct of_device_id ad7879_spi_dt_ids[] = {
+ { .compatible = "adi,ad7879", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ad7879_spi_dt_ids);
+#endif
+
static struct spi_driver ad7879_spi_driver = {
.driver = {
.name = "ad7879",
.pm = &ad7879_pm_ops,
+ .of_match_table = of_match_ptr(ad7879_spi_dt_ids),
},
.probe = ad7879_spi_probe,
.remove = ad7879_spi_remove,
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c
index 16b5cc2196f2..69d299d5dd00 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -31,7 +31,8 @@
#include <linux/i2c.h>
#include <linux/gpio.h>
-#include <linux/spi/ad7879.h>
+#include <linux/input/touchscreen.h>
+#include <linux/platform_data/ad7879.h>
#include <linux/module.h>
#include "ad7879.h"
@@ -94,8 +95,8 @@
#define AD7879_TEMP_BIT (1<<1)
enum {
- AD7879_SEQ_XPOS = 0,
- AD7879_SEQ_YPOS = 1,
+ AD7879_SEQ_YPOS = 0,
+ AD7879_SEQ_XPOS = 1,
AD7879_SEQ_Z1 = 2,
AD7879_SEQ_Z2 = 3,
AD7879_NR_SENSE = 4,
@@ -126,7 +127,6 @@ struct ad7879 {
u8 pen_down_acc_interval;
u8 median;
u16 x_plate_ohms;
- u16 pressure_max;
u16 cmd_crtl1;
u16 cmd_crtl2;
u16 cmd_crtl3;
@@ -170,10 +170,10 @@ static int ad7879_report(struct ad7879 *ts)
* filter. The combination of these two techniques provides a robust
* solution, discarding the spurious noise in the signal and keeping
* only the data of interest. The size of both filters is
- * programmable. (dev.platform_data, see linux/spi/ad7879.h) Other
- * user-programmable conversion controls include variable acquisition
- * time, and first conversion delay. Up to 16 averages can be taken
- * per conversion.
+ * programmable. (dev.platform_data, see linux/platform_data/ad7879.h)
+ * Other user-programmable conversion controls include variable
+ * acquisition time, and first conversion delay. Up to 16 averages can
+ * be taken per conversion.
*/
if (likely(x && z1)) {
@@ -186,7 +186,7 @@ static int ad7879_report(struct ad7879 *ts)
* Sample found inconsistent, pressure is beyond
* the maximum. Don't report it to user space.
*/
- if (Rt > ts->pressure_max)
+ if (Rt > input_abs_get_max(input_dev, ABS_PRESSURE))
return -EINVAL;
/*
@@ -469,7 +469,7 @@ static void ad7879_gpio_remove(struct ad7879 *ts)
{
const struct ad7879_platform_data *pdata = dev_get_platdata(ts->dev);
- if (pdata->gpio_export)
+ if (pdata && pdata->gpio_export)
gpiochip_remove(&ts->gc);
}
@@ -485,6 +485,32 @@ static inline void ad7879_gpio_remove(struct ad7879 *ts)
}
#endif
+static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts)
+{
+ int err;
+ u32 tmp;
+
+ err = device_property_read_u32(dev, "adi,resistance-plate-x", &tmp);
+ if (err) {
+ dev_err(dev, "failed to get resistance-plate-x property\n");
+ return err;
+ }
+ ts->x_plate_ohms = (u16)tmp;
+
+ device_property_read_u8(dev, "adi,first-conversion-delay",
+ &ts->first_conversion_delay);
+ device_property_read_u8(dev, "adi,acquisition-time",
+ &ts->acquisition_time);
+ device_property_read_u8(dev, "adi,median-filter-size", &ts->median);
+ device_property_read_u8(dev, "adi,averaging", &ts->averaging);
+ device_property_read_u8(dev, "adi,conversion-interval",
+ &ts->pen_down_acc_interval);
+
+ ts->swap_xy = device_property_read_bool(dev, "touchscreen-swapped-x-y");
+
+ return 0;
+}
+
struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
const struct ad7879_bus_ops *bops)
{
@@ -495,41 +521,44 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
u16 revid;
if (!irq) {
- dev_err(dev, "no IRQ?\n");
- err = -EINVAL;
- goto err_out;
+ dev_err(dev, "No IRQ specified\n");
+ return ERR_PTR(-EINVAL);
}
- if (!pdata) {
- dev_err(dev, "no platform data?\n");
- err = -EINVAL;
- goto err_out;
+ ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return ERR_PTR(-ENOMEM);
+
+ if (pdata) {
+ /* Platform data use swapped axis (backward compatibility) */
+ ts->swap_xy = !pdata->swap_xy;
+
+ ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
+
+ ts->first_conversion_delay = pdata->first_conversion_delay;
+ ts->acquisition_time = pdata->acquisition_time;
+ ts->averaging = pdata->averaging;
+ ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
+ ts->median = pdata->median;
+ } else if (dev->of_node) {
+ ad7879_parse_dt(dev, ts);
+ } else {
+ dev_err(dev, "No platform data\n");
+ return ERR_PTR(-EINVAL);
}
- ts = kzalloc(sizeof(*ts), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!ts || !input_dev) {
- err = -ENOMEM;
- goto err_free_mem;
+ input_dev = devm_input_allocate_device(dev);
+ if (!input_dev) {
+ dev_err(dev, "Failed to allocate input device\n");
+ return ERR_PTR(-ENOMEM);
}
ts->bops = bops;
ts->dev = dev;
ts->input = input_dev;
ts->irq = irq;
- ts->swap_xy = pdata->swap_xy;
setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts);
-
- ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
- ts->pressure_max = pdata->pressure_max ? : ~0;
-
- ts->first_conversion_delay = pdata->first_conversion_delay;
- ts->acquisition_time = pdata->acquisition_time;
- ts->averaging = pdata->averaging;
- ts->pen_down_acc_interval = pdata->pen_down_acc_interval;
- ts->median = pdata->median;
-
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
input_dev->name = "AD7879 Touchscreen";
@@ -550,21 +579,33 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
- input_set_abs_params(input_dev, ABS_X,
- pdata->x_min ? : 0,
- pdata->x_max ? : MAX_12BIT,
- 0, 0);
- input_set_abs_params(input_dev, ABS_Y,
- pdata->y_min ? : 0,
- pdata->y_max ? : MAX_12BIT,
- 0, 0);
- input_set_abs_params(input_dev, ABS_PRESSURE,
- pdata->pressure_min, pdata->pressure_max, 0, 0);
+ if (pdata) {
+ input_set_abs_params(input_dev, ABS_X,
+ pdata->x_min ? : 0,
+ pdata->x_max ? : MAX_12BIT,
+ 0, 0);
+ input_set_abs_params(input_dev, ABS_Y,
+ pdata->y_min ? : 0,
+ pdata->y_max ? : MAX_12BIT,
+ 0, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE,
+ pdata->pressure_min,
+ pdata->pressure_max ? : ~0,
+ 0, 0);
+ } else {
+ input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
+ touchscreen_parse_properties(input_dev, false);
+ if (!input_abs_get_max(input_dev, ABS_PRESSURE)) {
+ dev_err(dev, "Touchscreen pressure is not specified\n");
+ return ERR_PTR(-EINVAL);
+ }
+ }
err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET);
if (err < 0) {
dev_err(dev, "Failed to write %s\n", input_dev->name);
- goto err_free_mem;
+ return ERR_PTR(err);
}
revid = ad7879_read(ts, AD7879_REG_REVID);
@@ -573,8 +614,7 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
if (input_dev->id.product != devid) {
dev_err(dev, "Failed to probe %s (%x vs %x)\n",
input_dev->name, devid, revid);
- err = -ENODEV;
- goto err_free_mem;
+ return ERR_PTR(-ENODEV);
}
ts->cmd_crtl3 = AD7879_YPLUS_BIT |
@@ -594,23 +634,25 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq,
AD7879_ACQ(ts->acquisition_time) |
AD7879_TMR(ts->pen_down_acc_interval);
- err = request_threaded_irq(ts->irq, NULL, ad7879_irq,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- dev_name(dev), ts);
+ err = devm_request_threaded_irq(dev, ts->irq, NULL, ad7879_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ dev_name(dev), ts);
if (err) {
- dev_err(dev, "irq %d busy?\n", ts->irq);
- goto err_free_mem;
+ dev_err(dev, "Failed to request IRQ: %d\n", err);
+ return ERR_PTR(err);
}
__ad7879_disable(ts);
err = sysfs_create_group(&dev->kobj, &ad7879_attr_group);
if (err)
- goto err_free_irq;
+ goto err_out;
- err = ad7879_gpio_add(ts, pdata);
- if (err)
- goto err_remove_attr;
+ if (pdata) {
+ err = ad7879_gpio_add(ts, pdata);
+ if (err)
+ goto err_remove_attr;
+ }
err = input_register_device(input_dev);
if (err)
@@ -622,11 +664,6 @@ err_remove_gpio:
ad7879_gpio_remove(ts);
err_remove_attr:
sysfs_remove_group(&dev->kobj, &ad7879_attr_group);
-err_free_irq:
- free_irq(ts->irq, ts);
-err_free_mem:
- input_free_device(input_dev);
- kfree(ts);
err_out:
return ERR_PTR(err);
}
@@ -636,9 +673,6 @@ void ad7879_remove(struct ad7879 *ts)
{
ad7879_gpio_remove(ts);
sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group);
- free_irq(ts->irq, ts);
- input_unregister_device(ts->input);
- kfree(ts);
}
EXPORT_SYMBOL(ad7879_remove);
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 5b74e8b84e79..91cda8f8119d 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -30,9 +30,12 @@
#include <linux/delay.h>
#include <linux/input.h>
#include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
+#include <linux/property.h>
+#include <linux/gpio/consumer.h>
#include "cyttsp_core.h"
@@ -57,6 +60,7 @@
#define CY_DELAY_DFLT 20 /* ms */
#define CY_DELAY_MAX 500
#define CY_ACT_DIST_DFLT 0xF8
+#define CY_ACT_DIST_MASK 0x0F
#define CY_HNDSHK_BIT 0x80
/* device mode bits */
#define CY_OPERATE_MODE 0x00
@@ -120,7 +124,7 @@ static int ttsp_send_command(struct cyttsp *ts, u8 cmd)
static int cyttsp_handshake(struct cyttsp *ts)
{
- if (ts->pdata->use_hndshk)
+ if (ts->use_hndshk)
return ttsp_send_command(ts,
ts->xy_data.hst_mode ^ CY_HNDSHK_BIT);
@@ -142,9 +146,9 @@ static int cyttsp_exit_bl_mode(struct cyttsp *ts)
u8 bl_cmd[sizeof(bl_command)];
memcpy(bl_cmd, bl_command, sizeof(bl_command));
- if (ts->pdata->bl_keys)
+ if (ts->bl_keys)
memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
- ts->pdata->bl_keys, CY_NUM_BL_KEYS);
+ ts->bl_keys, CY_NUM_BL_KEYS);
error = ttsp_write_block_data(ts, CY_REG_BASE,
sizeof(bl_cmd), bl_cmd);
@@ -217,14 +221,14 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
{
int retval = 0;
- if (ts->pdata->act_intrvl != CY_ACT_INTRVL_DFLT ||
- ts->pdata->tch_tmout != CY_TCH_TMOUT_DFLT ||
- ts->pdata->lp_intrvl != CY_LP_INTRVL_DFLT) {
+ if (ts->act_intrvl != CY_ACT_INTRVL_DFLT ||
+ ts->tch_tmout != CY_TCH_TMOUT_DFLT ||
+ ts->lp_intrvl != CY_LP_INTRVL_DFLT) {
u8 intrvl_ray[] = {
- ts->pdata->act_intrvl,
- ts->pdata->tch_tmout,
- ts->pdata->lp_intrvl
+ ts->act_intrvl,
+ ts->tch_tmout,
+ ts->lp_intrvl
};
/* set intrvl registers */
@@ -236,6 +240,16 @@ static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
return retval;
}
+static void cyttsp_hard_reset(struct cyttsp *ts)
+{
+ if (ts->reset_gpio) {
+ gpiod_set_value_cansleep(ts->reset_gpio, 1);
+ msleep(CY_DELAY_DFLT);
+ gpiod_set_value_cansleep(ts->reset_gpio, 0);
+ msleep(CY_DELAY_DFLT);
+ }
+}
+
static int cyttsp_soft_reset(struct cyttsp *ts)
{
unsigned long timeout;
@@ -263,7 +277,7 @@ out:
static int cyttsp_act_dist_setup(struct cyttsp *ts)
{
- u8 act_dist_setup = ts->pdata->act_dist;
+ u8 act_dist_setup = ts->act_dist;
/* Init gesture; active distance setup */
return ttsp_write_block_data(ts, CY_REG_ACT_DIST,
@@ -528,45 +542,110 @@ static void cyttsp_close(struct input_dev *dev)
cyttsp_disable(ts);
}
+static int cyttsp_parse_properties(struct cyttsp *ts)
+{
+ struct device *dev = ts->dev;
+ u32 dt_value;
+ int ret;
+
+ ts->bl_keys = devm_kzalloc(dev, CY_NUM_BL_KEYS, GFP_KERNEL);
+ if (!ts->bl_keys)
+ return -ENOMEM;
+
+ /* Set some default values */
+ ts->use_hndshk = false;
+ ts->act_dist = CY_ACT_DIST_DFLT;
+ ts->act_intrvl = CY_ACT_INTRVL_DFLT;
+ ts->tch_tmout = CY_TCH_TMOUT_DFLT;
+ ts->lp_intrvl = CY_LP_INTRVL_DFLT;
+
+ ret = device_property_read_u8_array(dev, "bootloader-key",
+ ts->bl_keys, CY_NUM_BL_KEYS);
+ if (ret) {
+ dev_err(dev,
+ "bootloader-key property could not be retrieved\n");
+ return ret;
+ }
+
+ ts->use_hndshk = device_property_present(dev, "use-handshake");
+
+ if (!device_property_read_u32(dev, "active-distance", &dt_value)) {
+ if (dt_value > 15) {
+ dev_err(dev, "active-distance (%u) must be [0-15]\n",
+ dt_value);
+ return -EINVAL;
+ }
+ ts->act_dist &= ~CY_ACT_DIST_MASK;
+ ts->act_dist |= dt_value;
+ }
+
+ if (!device_property_read_u32(dev, "active-interval-ms", &dt_value)) {
+ if (dt_value > 255) {
+ dev_err(dev, "active-interval-ms (%u) must be [0-255]\n",
+ dt_value);
+ return -EINVAL;
+ }
+ ts->act_intrvl = dt_value;
+ }
+
+ if (!device_property_read_u32(dev, "lowpower-interval-ms", &dt_value)) {
+ if (dt_value > 2550) {
+ dev_err(dev, "lowpower-interval-ms (%u) must be [0-2550]\n",
+ dt_value);
+ return -EINVAL;
+ }
+ /* Register value is expressed in 0.01s / bit */
+ ts->lp_intrvl = dt_value / 10;
+ }
+
+ if (!device_property_read_u32(dev, "touch-timeout-ms", &dt_value)) {
+ if (dt_value > 2550) {
+ dev_err(dev, "touch-timeout-ms (%u) must be [0-2550]\n",
+ dt_value);
+ return -EINVAL;
+ }
+ /* Register value is expressed in 0.01s / bit */
+ ts->tch_tmout = dt_value / 10;
+ }
+
+ return 0;
+}
+
struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
struct device *dev, int irq, size_t xfer_buf_size)
{
- const struct cyttsp_platform_data *pdata = dev_get_platdata(dev);
struct cyttsp *ts;
struct input_dev *input_dev;
int error;
- if (!pdata || !pdata->name || irq <= 0) {
- error = -EINVAL;
- goto err_out;
- }
+ ts = devm_kzalloc(dev, sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
+ if (!ts)
+ return ERR_PTR(-ENOMEM);
- ts = kzalloc(sizeof(*ts) + xfer_buf_size, GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!ts || !input_dev) {
- error = -ENOMEM;
- goto err_free_mem;
- }
+ input_dev = devm_input_allocate_device(dev);
+ if (!input_dev)
+ return ERR_PTR(-ENOMEM);
ts->dev = dev;
ts->input = input_dev;
- ts->pdata = dev_get_platdata(dev);
ts->bus_ops = bus_ops;
ts->irq = irq;
+ ts->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(ts->reset_gpio)) {
+ error = PTR_ERR(ts->reset_gpio);
+ dev_err(dev, "Failed to request reset gpio, error %d\n", error);
+ return ERR_PTR(error);
+ }
+
+ error = cyttsp_parse_properties(ts);
+ if (error)
+ return ERR_PTR(error);
+
init_completion(&ts->bl_ready);
snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev));
- if (pdata->init) {
- error = pdata->init();
- if (error) {
- dev_err(ts->dev, "platform init failed, err: %d\n",
- error);
- goto err_free_mem;
- }
- }
-
- input_dev->name = pdata->name;
+ input_dev->name = "Cypress TTSP TouchScreen";
input_dev->phys = ts->phys;
input_dev->id.bustype = bus_ops->bustype;
input_dev->dev.parent = ts->dev;
@@ -576,63 +655,44 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
input_set_drvdata(input_dev, ts);
- __set_bit(EV_ABS, input_dev->evbit);
- input_set_abs_params(input_dev, ABS_MT_POSITION_X,
- 0, pdata->maxx, 0, 0);
- input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
- 0, pdata->maxy, 0, 0);
- input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
- 0, CY_MAXZ, 0, 0);
+ input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
+ input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+ touchscreen_parse_properties(input_dev, true);
- input_mt_init_slots(input_dev, CY_MAX_ID, 0);
+ error = input_mt_init_slots(input_dev, CY_MAX_ID, 0);
+ if (error) {
+ dev_err(dev, "Unable to init MT slots.\n");
+ return ERR_PTR(error);
+ }
- error = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- pdata->name, ts);
+ error = devm_request_threaded_irq(dev, ts->irq, NULL, cyttsp_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "cyttsp", ts);
if (error) {
dev_err(ts->dev, "failed to request IRQ %d, err: %d\n",
ts->irq, error);
- goto err_platform_exit;
+ return ERR_PTR(error);
}
disable_irq(ts->irq);
+ cyttsp_hard_reset(ts);
+
error = cyttsp_power_on(ts);
if (error)
- goto err_free_irq;
+ return ERR_PTR(error);
error = input_register_device(input_dev);
if (error) {
dev_err(ts->dev, "failed to register input device: %d\n",
error);
- goto err_free_irq;
+ return ERR_PTR(error);
}
return ts;
-
-err_free_irq:
- free_irq(ts->irq, ts);
-err_platform_exit:
- if (pdata->exit)
- pdata->exit();
-err_free_mem:
- input_free_device(input_dev);
- kfree(ts);
-err_out:
- return ERR_PTR(error);
}
EXPORT_SYMBOL_GPL(cyttsp_probe);
-void cyttsp_remove(struct cyttsp *ts)
-{
- free_irq(ts->irq, ts);
- input_unregister_device(ts->input);
- if (ts->pdata->exit)
- ts->pdata->exit();
- kfree(ts);
-}
-EXPORT_SYMBOL_GPL(cyttsp_remove);
-
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
MODULE_AUTHOR("Cypress");
diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
index 07074110a902..7835e2bacf5a 100644
--- a/drivers/input/touchscreen/cyttsp_core.h
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -129,7 +129,6 @@ struct cyttsp {
int irq;
struct input_dev *input;
char phys[32];
- const struct cyttsp_platform_data *pdata;
const struct cyttsp_bus_ops *bus_ops;
struct cyttsp_bootloader_data bl_data;
struct cyttsp_sysinfo_data sysinfo_data;
@@ -138,12 +137,19 @@ struct cyttsp {
enum cyttsp_state state;
bool suspended;
+ struct gpio_desc *reset_gpio;
+ bool use_hndshk;
+ u8 act_dist;
+ u8 act_intrvl;
+ u8 tch_tmout;
+ u8 lp_intrvl;
+ u8 *bl_keys;
+
u8 xfer_buf[] ____cacheline_aligned;
};
struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
struct device *dev, int irq, size_t xfer_buf_size);
-void cyttsp_remove(struct cyttsp *ts);
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
u8 length, const void *values);
diff --git a/drivers/input/touchscreen/cyttsp_i2c.c b/drivers/input/touchscreen/cyttsp_i2c.c
index eee51b3f2e3f..1edfdba96ede 100644
--- a/drivers/input/touchscreen/cyttsp_i2c.c
+++ b/drivers/input/touchscreen/cyttsp_i2c.c
@@ -56,15 +56,6 @@ static int cyttsp_i2c_probe(struct i2c_client *client,
return 0;
}
-static int cyttsp_i2c_remove(struct i2c_client *client)
-{
- struct cyttsp *ts = i2c_get_clientdata(client);
-
- cyttsp_remove(ts);
-
- return 0;
-}
-
static const struct i2c_device_id cyttsp_i2c_id[] = {
{ CY_I2C_NAME, 0 },
{ }
@@ -77,7 +68,6 @@ static struct i2c_driver cyttsp_i2c_driver = {
.pm = &cyttsp_pm_ops,
},
.probe = cyttsp_i2c_probe,
- .remove = cyttsp_i2c_remove,
.id_table = cyttsp_i2c_id,
};
diff --git a/drivers/input/touchscreen/cyttsp_spi.c b/drivers/input/touchscreen/cyttsp_spi.c
index bbeeb2488b57..3c9d18b1b6ef 100644
--- a/drivers/input/touchscreen/cyttsp_spi.c
+++ b/drivers/input/touchscreen/cyttsp_spi.c
@@ -170,22 +170,12 @@ static int cyttsp_spi_probe(struct spi_device *spi)
return 0;
}
-static int cyttsp_spi_remove(struct spi_device *spi)
-{
- struct cyttsp *ts = spi_get_drvdata(spi);
-
- cyttsp_remove(ts);
-
- return 0;
-}
-
static struct spi_driver cyttsp_spi_driver = {
.driver = {
.name = CY_SPI_NAME,
.pm = &cyttsp_pm_ops,
},
.probe = cyttsp_spi_probe,
- .remove = cyttsp_spi_remove,
};
module_spi_driver(cyttsp_spi_driver);
diff --git a/drivers/input/touchscreen/fsl-imx25-tcq.c b/drivers/input/touchscreen/fsl-imx25-tcq.c
new file mode 100644
index 000000000000..fe9877a6af9e
--- /dev/null
+++ b/drivers/input/touchscreen/fsl-imx25-tcq.c
@@ -0,0 +1,596 @@
+/*
+ * Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License version 2 as published by the
+ * Free Software Foundation.
+ *
+ * Based on driver from 2011:
+ * Juergen Beisert, Pengutronix <kernel@pengutronix.de>
+ *
+ * This is the driver for the imx25 TCQ (Touchscreen Conversion Queue)
+ * connected to the imx25 ADC.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/imx25-tsadc.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+static const char mx25_tcq_name[] = "mx25-tcq";
+
+enum mx25_tcq_mode {
+ MX25_TS_4WIRE,
+};
+
+struct mx25_tcq_priv {
+ struct regmap *regs;
+ struct regmap *core_regs;
+ struct input_dev *idev;
+ enum mx25_tcq_mode mode;
+ unsigned int pen_threshold;
+ unsigned int sample_count;
+ unsigned int expected_samples;
+ unsigned int pen_debounce;
+ unsigned int settling_time;
+ struct clk *clk;
+ int irq;
+ struct device *dev;
+};
+
+static struct regmap_config mx25_tcq_regconfig = {
+ .fast_io = true,
+ .max_register = 0x5c,
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static const struct of_device_id mx25_tcq_ids[] = {
+ { .compatible = "fsl,imx25-tcq", },
+ { /* Sentinel */ }
+};
+
+#define TSC_4WIRE_PRE_INDEX 0
+#define TSC_4WIRE_X_INDEX 1
+#define TSC_4WIRE_Y_INDEX 2
+#define TSC_4WIRE_POST_INDEX 3
+#define TSC_4WIRE_LEAVE 4
+
+#define MX25_TSC_DEF_THRESHOLD 80
+#define TSC_MAX_SAMPLES 16
+
+#define MX25_TSC_REPEAT_WAIT 14
+
+enum mx25_adc_configurations {
+ MX25_CFG_PRECHARGE = 0,
+ MX25_CFG_TOUCH_DETECT,
+ MX25_CFG_X_MEASUREMENT,
+ MX25_CFG_Y_MEASUREMENT,
+};
+
+#define MX25_PRECHARGE_VALUE (\
+ MX25_ADCQ_CFG_YPLL_OFF | \
+ MX25_ADCQ_CFG_XNUR_OFF | \
+ MX25_ADCQ_CFG_XPUL_HIGH | \
+ MX25_ADCQ_CFG_REFP_INT | \
+ MX25_ADCQ_CFG_IN_XP | \
+ MX25_ADCQ_CFG_REFN_NGND2 | \
+ MX25_ADCQ_CFG_IGS)
+
+#define MX25_TOUCH_DETECT_VALUE (\
+ MX25_ADCQ_CFG_YNLR | \
+ MX25_ADCQ_CFG_YPLL_OFF | \
+ MX25_ADCQ_CFG_XNUR_OFF | \
+ MX25_ADCQ_CFG_XPUL_OFF | \
+ MX25_ADCQ_CFG_REFP_INT | \
+ MX25_ADCQ_CFG_IN_XP | \
+ MX25_ADCQ_CFG_REFN_NGND2 | \
+ MX25_ADCQ_CFG_PENIACK)
+
+static void imx25_setup_queue_cfgs(struct mx25_tcq_priv *priv,
+ unsigned int settling_cnt)
+{
+ u32 precharge_cfg =
+ MX25_PRECHARGE_VALUE |
+ MX25_ADCQ_CFG_SETTLING_TIME(settling_cnt);
+ u32 touch_detect_cfg =
+ MX25_TOUCH_DETECT_VALUE |
+ MX25_ADCQ_CFG_NOS(1) |
+ MX25_ADCQ_CFG_SETTLING_TIME(settling_cnt);
+
+ regmap_write(priv->core_regs, MX25_TSC_TICR, precharge_cfg);
+
+ /* PRECHARGE */
+ regmap_write(priv->regs, MX25_ADCQ_CFG(MX25_CFG_PRECHARGE),
+ precharge_cfg);
+
+ /* TOUCH_DETECT */
+ regmap_write(priv->regs, MX25_ADCQ_CFG(MX25_CFG_TOUCH_DETECT),
+ touch_detect_cfg);
+
+ /* X Measurement */
+ regmap_write(priv->regs, MX25_ADCQ_CFG(MX25_CFG_X_MEASUREMENT),
+ MX25_ADCQ_CFG_YPLL_OFF |
+ MX25_ADCQ_CFG_XNUR_LOW |
+ MX25_ADCQ_CFG_XPUL_HIGH |
+ MX25_ADCQ_CFG_REFP_XP |
+ MX25_ADCQ_CFG_IN_YP |
+ MX25_ADCQ_CFG_REFN_XN |
+ MX25_ADCQ_CFG_NOS(priv->sample_count) |
+ MX25_ADCQ_CFG_SETTLING_TIME(settling_cnt));
+
+ /* Y Measurement */
+ regmap_write(priv->regs, MX25_ADCQ_CFG(MX25_CFG_Y_MEASUREMENT),
+ MX25_ADCQ_CFG_YNLR |
+ MX25_ADCQ_CFG_YPLL_HIGH |
+ MX25_ADCQ_CFG_XNUR_OFF |
+ MX25_ADCQ_CFG_XPUL_OFF |
+ MX25_ADCQ_CFG_REFP_YP |
+ MX25_ADCQ_CFG_IN_XP |
+ MX25_ADCQ_CFG_REFN_YN |
+ MX25_ADCQ_CFG_NOS(priv->sample_count) |
+ MX25_ADCQ_CFG_SETTLING_TIME(settling_cnt));
+
+ /* Enable the touch detection right now */
+ regmap_write(priv->core_regs, MX25_TSC_TICR, touch_detect_cfg |
+ MX25_ADCQ_CFG_IGS);
+}
+
+static int imx25_setup_queue_4wire(struct mx25_tcq_priv *priv,
+ unsigned settling_cnt, int *items)
+{
+ imx25_setup_queue_cfgs(priv, settling_cnt);
+
+ /* Setup the conversion queue */
+ regmap_write(priv->regs, MX25_ADCQ_ITEM_7_0,
+ MX25_ADCQ_ITEM(0, MX25_CFG_PRECHARGE) |
+ MX25_ADCQ_ITEM(1, MX25_CFG_TOUCH_DETECT) |
+ MX25_ADCQ_ITEM(2, MX25_CFG_X_MEASUREMENT) |
+ MX25_ADCQ_ITEM(3, MX25_CFG_Y_MEASUREMENT) |
+ MX25_ADCQ_ITEM(4, MX25_CFG_PRECHARGE) |
+ MX25_ADCQ_ITEM(5, MX25_CFG_TOUCH_DETECT));
+
+ /*
+ * We measure X/Y with 'sample_count' number of samples and execute a
+ * touch detection twice, with 1 sample each
+ */
+ priv->expected_samples = priv->sample_count * 2 + 2;
+ *items = 6;
+
+ return 0;
+}
+
+static void mx25_tcq_disable_touch_irq(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR, MX25_ADCQ_CR_PDMSK,
+ MX25_ADCQ_CR_PDMSK);
+}
+
+static void mx25_tcq_enable_touch_irq(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR, MX25_ADCQ_CR_PDMSK, 0);
+}
+
+static void mx25_tcq_disable_fifo_irq(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_MR, MX25_ADCQ_MR_FDRY_IRQ,
+ MX25_ADCQ_MR_FDRY_IRQ);
+}
+
+static void mx25_tcq_enable_fifo_irq(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_MR, MX25_ADCQ_MR_FDRY_IRQ, 0);
+}
+
+static void mx25_tcq_force_queue_start(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_FQS,
+ MX25_ADCQ_CR_FQS);
+}
+
+static void mx25_tcq_force_queue_stop(struct mx25_tcq_priv *priv)
+{
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_FQS, 0);
+}
+
+static void mx25_tcq_fifo_reset(struct mx25_tcq_priv *priv)
+{
+ u32 tcqcr;
+
+ regmap_read(priv->regs, MX25_ADCQ_CR, &tcqcr);
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR, MX25_ADCQ_CR_FRST,
+ MX25_ADCQ_CR_FRST);
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR, MX25_ADCQ_CR_FRST, 0);
+ regmap_write(priv->regs, MX25_ADCQ_CR, tcqcr);
+}
+
+static void mx25_tcq_re_enable_touch_detection(struct mx25_tcq_priv *priv)
+{
+ /* stop the queue from looping */
+ mx25_tcq_force_queue_stop(priv);
+
+ /* for a clean touch detection, preload the X plane */
+ regmap_write(priv->core_regs, MX25_TSC_TICR, MX25_PRECHARGE_VALUE);
+
+ /* waste some time now to pre-load the X plate to high voltage */
+ mx25_tcq_fifo_reset(priv);
+
+ /* re-enable the detection right now */
+ regmap_write(priv->core_regs, MX25_TSC_TICR,
+ MX25_TOUCH_DETECT_VALUE | MX25_ADCQ_CFG_IGS);
+
+ regmap_update_bits(priv->regs, MX25_ADCQ_SR, MX25_ADCQ_SR_PD,
+ MX25_ADCQ_SR_PD);
+
+ /* enable the pen down event to be a source for the interrupt */
+ regmap_update_bits(priv->regs, MX25_ADCQ_MR, MX25_ADCQ_MR_PD_IRQ, 0);
+
+ /* lets fire the next IRQ if someone touches the touchscreen */
+ mx25_tcq_enable_touch_irq(priv);
+}
+
+static void mx25_tcq_create_event_for_4wire(struct mx25_tcq_priv *priv,
+ u32 *sample_buf,
+ unsigned int samples)
+{
+ unsigned int x_pos = 0;
+ unsigned int y_pos = 0;
+ unsigned int touch_pre = 0;
+ unsigned int touch_post = 0;
+ unsigned int i;
+
+ for (i = 0; i < samples; i++) {
+ unsigned int index = MX25_ADCQ_FIFO_ID(sample_buf[i]);
+ unsigned int val = MX25_ADCQ_FIFO_DATA(sample_buf[i]);
+
+ switch (index) {
+ case 1:
+ touch_pre = val;
+ break;
+ case 2:
+ x_pos = val;
+ break;
+ case 3:
+ y_pos = val;
+ break;
+ case 5:
+ touch_post = val;
+ break;
+ default:
+ dev_dbg(priv->dev, "Dropped samples because of invalid index %d\n",
+ index);
+ return;
+ }
+ }
+
+ if (samples != 0) {
+ /*
+ * only if both touch measures are below a threshold,
+ * the position is valid
+ */
+ if (touch_pre < priv->pen_threshold &&
+ touch_post < priv->pen_threshold) {
+ /* valid samples, generate a report */
+ x_pos /= priv->sample_count;
+ y_pos /= priv->sample_count;
+ input_report_abs(priv->idev, ABS_X, x_pos);
+ input_report_abs(priv->idev, ABS_Y, y_pos);
+ input_report_key(priv->idev, BTN_TOUCH, 1);
+ input_sync(priv->idev);
+
+ /* get next sample */
+ mx25_tcq_enable_fifo_irq(priv);
+ } else if (touch_pre >= priv->pen_threshold &&
+ touch_post >= priv->pen_threshold) {
+ /*
+ * if both samples are invalid,
+ * generate a release report
+ */
+ input_report_key(priv->idev, BTN_TOUCH, 0);
+ input_sync(priv->idev);
+ mx25_tcq_re_enable_touch_detection(priv);
+ } else {
+ /*
+ * if only one of both touch measurements are
+ * below the threshold, still some bouncing
+ * happens. Take additional samples in this
+ * case to be sure
+ */
+ mx25_tcq_enable_fifo_irq(priv);
+ }
+ }
+}
+
+static irqreturn_t mx25_tcq_irq_thread(int irq, void *dev_id)
+{
+ struct mx25_tcq_priv *priv = dev_id;
+ u32 sample_buf[TSC_MAX_SAMPLES];
+ unsigned int samples;
+ u32 stats;
+ unsigned int i;
+
+ /*
+ * Check how many samples are available. We always have to read exactly
+ * sample_count samples from the fifo, or a multiple of sample_count.
+ * Otherwise we mixup samples into different touch events.
+ */
+ regmap_read(priv->regs, MX25_ADCQ_SR, &stats);
+ samples = MX25_ADCQ_SR_FDN(stats);
+ samples -= samples % priv->sample_count;
+
+ if (!samples)
+ return IRQ_HANDLED;
+
+ for (i = 0; i != samples; ++i)
+ regmap_read(priv->regs, MX25_ADCQ_FIFO, &sample_buf[i]);
+
+ mx25_tcq_create_event_for_4wire(priv, sample_buf, samples);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t mx25_tcq_irq(int irq, void *dev_id)
+{
+ struct mx25_tcq_priv *priv = dev_id;
+ u32 stat;
+ int ret = IRQ_HANDLED;
+
+ regmap_read(priv->regs, MX25_ADCQ_SR, &stat);
+
+ if (stat & (MX25_ADCQ_SR_FRR | MX25_ADCQ_SR_FUR | MX25_ADCQ_SR_FOR))
+ mx25_tcq_re_enable_touch_detection(priv);
+
+ if (stat & MX25_ADCQ_SR_PD) {
+ mx25_tcq_disable_touch_irq(priv);
+ mx25_tcq_force_queue_start(priv);
+ mx25_tcq_enable_fifo_irq(priv);
+ }
+
+ if (stat & MX25_ADCQ_SR_FDRY) {
+ mx25_tcq_disable_fifo_irq(priv);
+ ret = IRQ_WAKE_THREAD;
+ }
+
+ regmap_update_bits(priv->regs, MX25_ADCQ_SR, MX25_ADCQ_SR_FRR |
+ MX25_ADCQ_SR_FUR | MX25_ADCQ_SR_FOR |
+ MX25_ADCQ_SR_PD,
+ MX25_ADCQ_SR_FRR | MX25_ADCQ_SR_FUR |
+ MX25_ADCQ_SR_FOR | MX25_ADCQ_SR_PD);
+
+ return ret;
+}
+
+/* configure the state machine for a 4-wire touchscreen */
+static int mx25_tcq_init(struct mx25_tcq_priv *priv)
+{
+ u32 tgcr;
+ unsigned int ipg_div;
+ unsigned int adc_period;
+ unsigned int debounce_cnt;
+ unsigned int settling_cnt;
+ int itemct;
+ int error;
+
+ regmap_read(priv->core_regs, MX25_TSC_TGCR, &tgcr);
+ ipg_div = max_t(unsigned int, 4, MX25_TGCR_GET_ADCCLK(tgcr));
+ adc_period = USEC_PER_SEC * ipg_div * 2 + 2;
+ adc_period /= clk_get_rate(priv->clk) / 1000 + 1;
+ debounce_cnt = DIV_ROUND_UP(priv->pen_debounce, adc_period * 8) - 1;
+ settling_cnt = DIV_ROUND_UP(priv->settling_time, adc_period * 8) - 1;
+
+ /* Reset */
+ regmap_write(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_QRST | MX25_ADCQ_CR_FRST);
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_QRST | MX25_ADCQ_CR_FRST, 0);
+
+ /* up to 128 * 8 ADC clocks are possible */
+ if (debounce_cnt > 127)
+ debounce_cnt = 127;
+
+ /* up to 255 * 8 ADC clocks are possible */
+ if (settling_cnt > 255)
+ settling_cnt = 255;
+
+ error = imx25_setup_queue_4wire(priv, settling_cnt, &itemct);
+ if (error)
+ return error;
+
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_LITEMID_MASK | MX25_ADCQ_CR_WMRK_MASK,
+ MX25_ADCQ_CR_LITEMID(itemct - 1) |
+ MX25_ADCQ_CR_WMRK(priv->expected_samples - 1));
+
+ /* setup debounce count */
+ regmap_update_bits(priv->core_regs, MX25_TSC_TGCR,
+ MX25_TGCR_PDBTIME_MASK,
+ MX25_TGCR_PDBTIME(debounce_cnt));
+
+ /* enable debounce */
+ regmap_update_bits(priv->core_regs, MX25_TSC_TGCR, MX25_TGCR_PDBEN,
+ MX25_TGCR_PDBEN);
+ regmap_update_bits(priv->core_regs, MX25_TSC_TGCR, MX25_TGCR_PDEN,
+ MX25_TGCR_PDEN);
+
+ /* enable the engine on demand */
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR, MX25_ADCQ_CR_QSM_MASK,
+ MX25_ADCQ_CR_QSM_FQS);
+
+ /* Enable repeat and repeat wait */
+ regmap_update_bits(priv->regs, MX25_ADCQ_CR,
+ MX25_ADCQ_CR_RPT | MX25_ADCQ_CR_RWAIT_MASK,
+ MX25_ADCQ_CR_RPT |
+ MX25_ADCQ_CR_RWAIT(MX25_TSC_REPEAT_WAIT));
+
+ return 0;
+}
+
+static int mx25_tcq_parse_dt(struct platform_device *pdev,
+ struct mx25_tcq_priv *priv)
+{
+ struct device_node *np = pdev->dev.of_node;
+ u32 wires;
+ int error;
+
+ /* Setup defaults */
+ priv->pen_threshold = 500;
+ priv->sample_count = 3;
+ priv->pen_debounce = 1000000;
+ priv->settling_time = 250000;
+
+ error = of_property_read_u32(np, "fsl,wires", &wires);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to find fsl,wires properties\n");
+ return error;
+ }
+
+ if (wires == 4) {
+ priv->mode = MX25_TS_4WIRE;
+ } else {
+ dev_err(&pdev->dev, "%u-wire mode not supported\n", wires);
+ return -EINVAL;
+ }
+
+ /* These are optional, we don't care about the return values */
+ of_property_read_u32(np, "fsl,pen-threshold", &priv->pen_threshold);
+ of_property_read_u32(np, "fsl,settling-time-ns", &priv->settling_time);
+ of_property_read_u32(np, "fsl,pen-debounce-ns", &priv->pen_debounce);
+
+ return 0;
+}
+
+static int mx25_tcq_open(struct input_dev *idev)
+{
+ struct device *dev = &idev->dev;
+ struct mx25_tcq_priv *priv = dev_get_drvdata(dev);
+ int error;
+
+ error = clk_prepare_enable(priv->clk);
+ if (error) {
+ dev_err(dev, "Failed to enable ipg clock\n");
+ return error;
+ }
+
+ error = mx25_tcq_init(priv);
+ if (error) {
+ dev_err(dev, "Failed to init tcq\n");
+ clk_disable_unprepare(priv->clk);
+ return error;
+ }
+
+ mx25_tcq_re_enable_touch_detection(priv);
+
+ return 0;
+}
+
+static void mx25_tcq_close(struct input_dev *idev)
+{
+ struct mx25_tcq_priv *priv = input_get_drvdata(idev);
+
+ mx25_tcq_force_queue_stop(priv);
+ mx25_tcq_disable_touch_irq(priv);
+ mx25_tcq_disable_fifo_irq(priv);
+ clk_disable_unprepare(priv->clk);
+}
+
+static int mx25_tcq_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct input_dev *idev;
+ struct mx25_tcq_priv *priv;
+ struct mx25_tsadc *tsadc = dev_get_drvdata(pdev->dev.parent);
+ struct resource *res;
+ void __iomem *mem;
+ int error;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mem = devm_ioremap_resource(dev, res);
+ if (IS_ERR(mem))
+ return PTR_ERR(mem);
+
+ error = mx25_tcq_parse_dt(pdev, priv);
+ if (error)
+ return error;
+
+ priv->regs = devm_regmap_init_mmio(dev, mem, &mx25_tcq_regconfig);
+ if (IS_ERR(priv->regs)) {
+ dev_err(dev, "Failed to initialize regmap\n");
+ return PTR_ERR(priv->regs);
+ }
+
+ priv->irq = platform_get_irq(pdev, 0);
+ if (priv->irq <= 0) {
+ dev_err(dev, "Failed to get IRQ\n");
+ return priv->irq;
+ }
+
+ idev = devm_input_allocate_device(dev);
+ if (!idev) {
+ dev_err(dev, "Failed to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ idev->name = mx25_tcq_name;
+ input_set_capability(idev, EV_KEY, BTN_TOUCH);
+ input_set_abs_params(idev, ABS_X, 0, 0xfff, 0, 0);
+ input_set_abs_params(idev, ABS_Y, 0, 0xfff, 0, 0);
+
+ idev->id.bustype = BUS_HOST;
+ idev->open = mx25_tcq_open;
+ idev->close = mx25_tcq_close;
+
+ priv->idev = idev;
+ input_set_drvdata(idev, priv);
+
+ priv->core_regs = tsadc->regs;
+ if (!priv->core_regs)
+ return -EINVAL;
+
+ priv->clk = tsadc->clk;
+ if (!priv->clk)
+ return -EINVAL;
+
+ platform_set_drvdata(pdev, priv);
+
+ error = devm_request_threaded_irq(dev, priv->irq, mx25_tcq_irq,
+ mx25_tcq_irq_thread, 0, pdev->name,
+ priv);
+ if (error) {
+ dev_err(dev, "Failed requesting IRQ\n");
+ return error;
+ }
+
+ error = input_register_device(idev);
+ if (error) {
+ dev_err(dev, "Failed to register input device\n");
+ return error;
+ }
+
+ return 0;
+}
+
+static struct platform_driver mx25_tcq_driver = {
+ .driver = {
+ .name = "mx25-tcq",
+ .of_match_table = mx25_tcq_ids,
+ },
+ .probe = mx25_tcq_probe,
+};
+module_platform_driver(mx25_tcq_driver);
+
+MODULE_DESCRIPTION("TS input driver for Freescale mx25");
+MODULE_AUTHOR("Markus Pargmann <mpa@pengutronix.de>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/input/touchscreen/melfas_mip4.c b/drivers/input/touchscreen/melfas_mip4.c
new file mode 100644
index 000000000000..fb5fb9140ca9
--- /dev/null
+++ b/drivers/input/touchscreen/melfas_mip4.c
@@ -0,0 +1,1543 @@
+/*
+ * MELFAS MIP4 Touchscreen
+ *
+ * Copyright (C) 2016 MELFAS Inc.
+ *
+ * Author : Sangwon Jee <jeesw@melfas.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/acpi.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#define MIP4_DEVICE_NAME "mip4_ts"
+
+/*****************************************************************
+ * Protocol
+ * Version : MIP 4.0 Rev 4.6
+ *****************************************************************/
+
+/* Address */
+#define MIP4_R0_BOOT 0x00
+#define MIP4_R1_BOOT_MODE 0x01
+#define MIP4_R1_BOOT_BUF_ADDR 0x10
+#define MIP4_R1_BOOT_STATUS 0x20
+#define MIP4_R1_BOOT_CMD 0x30
+#define MIP4_R1_BOOT_TARGET_ADDR 0x40
+#define MIP4_R1_BOOT_SIZE 0x44
+
+#define MIP4_R0_INFO 0x01
+#define MIP4_R1_INFO_PRODUCT_NAME 0x00
+#define MIP4_R1_INFO_RESOLUTION_X 0x10
+#define MIP4_R1_INFO_RESOLUTION_Y 0x12
+#define MIP4_R1_INFO_NODE_NUM_X 0x14
+#define MIP4_R1_INFO_NODE_NUM_Y 0x15
+#define MIP4_R1_INFO_KEY_NUM 0x16
+#define MIP4_R1_INFO_PRESSURE_NUM 0x17
+#define MIP4_R1_INFO_LENGTH_X 0x18
+#define MIP4_R1_INFO_LENGTH_Y 0x1A
+#define MIP4_R1_INFO_PPM_X 0x1C
+#define MIP4_R1_INFO_PPM_Y 0x1D
+#define MIP4_R1_INFO_VERSION_BOOT 0x20
+#define MIP4_R1_INFO_VERSION_CORE 0x22
+#define MIP4_R1_INFO_VERSION_APP 0x24
+#define MIP4_R1_INFO_VERSION_PARAM 0x26
+#define MIP4_R1_INFO_SECT_BOOT_START 0x30
+#define MIP4_R1_INFO_SECT_BOOT_END 0x31
+#define MIP4_R1_INFO_SECT_CORE_START 0x32
+#define MIP4_R1_INFO_SECT_CORE_END 0x33
+#define MIP4_R1_INFO_SECT_APP_START 0x34
+#define MIP4_R1_INFO_SECT_APP_END 0x35
+#define MIP4_R1_INFO_SECT_PARAM_START 0x36
+#define MIP4_R1_INFO_SECT_PARAM_END 0x37
+#define MIP4_R1_INFO_BUILD_DATE 0x40
+#define MIP4_R1_INFO_BUILD_TIME 0x44
+#define MIP4_R1_INFO_CHECKSUM_PRECALC 0x48
+#define MIP4_R1_INFO_CHECKSUM_REALTIME 0x4A
+#define MIP4_R1_INFO_PROTOCOL_NAME 0x50
+#define MIP4_R1_INFO_PROTOCOL_VERSION 0x58
+#define MIP4_R1_INFO_IC_ID 0x70
+#define MIP4_R1_INFO_IC_NAME 0x71
+#define MIP4_R1_INFO_IC_VENDOR_ID 0x75
+#define MIP4_R1_INFO_IC_HW_CATEGORY 0x77
+#define MIP4_R1_INFO_CONTACT_THD_SCR 0x78
+#define MIP4_R1_INFO_CONTACT_THD_KEY 0x7A
+
+#define MIP4_R0_EVENT 0x02
+#define MIP4_R1_EVENT_SUPPORTED_FUNC 0x00
+#define MIP4_R1_EVENT_FORMAT 0x04
+#define MIP4_R1_EVENT_SIZE 0x06
+#define MIP4_R1_EVENT_PACKET_INFO 0x10
+#define MIP4_R1_EVENT_PACKET_DATA 0x11
+
+#define MIP4_R0_CTRL 0x06
+#define MIP4_R1_CTRL_READY_STATUS 0x00
+#define MIP4_R1_CTRL_EVENT_READY 0x01
+#define MIP4_R1_CTRL_MODE 0x10
+#define MIP4_R1_CTRL_EVENT_TRIGGER_TYPE 0x11
+#define MIP4_R1_CTRL_RECALIBRATE 0x12
+#define MIP4_R1_CTRL_POWER_STATE 0x13
+#define MIP4_R1_CTRL_GESTURE_TYPE 0x14
+#define MIP4_R1_CTRL_DISABLE_ESD_ALERT 0x18
+#define MIP4_R1_CTRL_CHARGER_MODE 0x19
+#define MIP4_R1_CTRL_HIGH_SENS_MODE 0x1A
+#define MIP4_R1_CTRL_WINDOW_MODE 0x1B
+#define MIP4_R1_CTRL_PALM_REJECTION 0x1C
+#define MIP4_R1_CTRL_EDGE_CORRECTION 0x1D
+#define MIP4_R1_CTRL_ENTER_GLOVE_MODE 0x1E
+#define MIP4_R1_CTRL_I2C_ON_LPM 0x1F
+#define MIP4_R1_CTRL_GESTURE_DEBUG 0x20
+#define MIP4_R1_CTRL_PALM_EVENT 0x22
+#define MIP4_R1_CTRL_PROXIMITY_SENSING 0x23
+
+/* Value */
+#define MIP4_BOOT_MODE_BOOT 0x01
+#define MIP4_BOOT_MODE_APP 0x02
+
+#define MIP4_BOOT_STATUS_BUSY 0x05
+#define MIP4_BOOT_STATUS_ERROR 0x0E
+#define MIP4_BOOT_STATUS_DONE 0xA0
+
+#define MIP4_BOOT_CMD_MASS_ERASE 0x15
+#define MIP4_BOOT_CMD_PROGRAM 0x54
+#define MIP4_BOOT_CMD_ERASE 0x8F
+#define MIP4_BOOT_CMD_WRITE 0xA5
+#define MIP4_BOOT_CMD_READ 0xC2
+
+#define MIP4_EVENT_INPUT_TYPE_KEY 0
+#define MIP4_EVENT_INPUT_TYPE_SCREEN 1
+#define MIP4_EVENT_INPUT_TYPE_PROXIMITY 2
+
+#define I2C_RETRY_COUNT 3 /* 2~ */
+
+#define MIP4_BUF_SIZE 128
+#define MIP4_MAX_FINGERS 10
+#define MIP4_MAX_KEYS 4
+
+#define MIP4_TOUCH_MAJOR_MIN 0
+#define MIP4_TOUCH_MAJOR_MAX 255
+#define MIP4_TOUCH_MINOR_MIN 0
+#define MIP4_TOUCH_MINOR_MAX 255
+#define MIP4_PRESSURE_MIN 0
+#define MIP4_PRESSURE_MAX 255
+
+#define MIP4_FW_NAME "melfas_mip4.fw"
+#define MIP4_FW_UPDATE_DEBUG 0 /* 0 (default) or 1 */
+
+struct mip4_fw_version {
+ u16 boot;
+ u16 core;
+ u16 app;
+ u16 param;
+};
+
+struct mip4_ts {
+ struct i2c_client *client;
+ struct input_dev *input;
+ struct gpio_desc *gpio_ce;
+
+ char phys[32];
+ char product_name[16];
+
+ unsigned int max_x;
+ unsigned int max_y;
+ u8 node_x;
+ u8 node_y;
+ u8 node_key;
+ unsigned int ppm_x;
+ unsigned int ppm_y;
+
+ struct mip4_fw_version fw_version;
+
+ unsigned int event_size;
+ unsigned int event_format;
+
+ unsigned int key_num;
+ unsigned short key_code[MIP4_MAX_KEYS];
+
+ bool wake_irq_enabled;
+
+ u8 buf[MIP4_BUF_SIZE];
+};
+
+static int mip4_i2c_xfer(struct mip4_ts *ts,
+ char *write_buf, unsigned int write_len,
+ char *read_buf, unsigned int read_len)
+{
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .flags = 0,
+ .buf = write_buf,
+ .len = write_len,
+ }, {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .buf = read_buf,
+ .len = read_len,
+ },
+ };
+ int retry = I2C_RETRY_COUNT;
+ int res;
+ int error;
+
+ do {
+ res = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (res == ARRAY_SIZE(msg))
+ return 0;
+
+ error = res < 0 ? res : -EIO;
+ dev_err(&ts->client->dev,
+ "%s - i2c_transfer failed: %d (%d)\n",
+ __func__, error, res);
+ } while (--retry);
+
+ return error;
+}
+
+static void mip4_parse_fw_version(const u8 *buf, struct mip4_fw_version *v)
+{
+ v->boot = get_unaligned_le16(buf + 0);
+ v->core = get_unaligned_le16(buf + 2);
+ v->app = get_unaligned_le16(buf + 4);
+ v->param = get_unaligned_le16(buf + 6);
+}
+
+/*
+ * Read chip firmware version
+ */
+static int mip4_get_fw_version(struct mip4_ts *ts)
+{
+ u8 cmd[] = { MIP4_R0_INFO, MIP4_R1_INFO_VERSION_BOOT };
+ u8 buf[sizeof(ts->fw_version)];
+ int error;
+
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, sizeof(buf));
+ if (error) {
+ memset(&ts->fw_version, 0xff, sizeof(ts->fw_version));
+ return error;
+ }
+
+ mip4_parse_fw_version(buf, &ts->fw_version);
+
+ return 0;
+}
+
+/*
+ * Fetch device characteristics
+ */
+static int mip4_query_device(struct mip4_ts *ts)
+{
+ int error;
+ u8 cmd[2];
+ u8 buf[14];
+
+ /* Product name */
+ cmd[0] = MIP4_R0_INFO;
+ cmd[1] = MIP4_R1_INFO_PRODUCT_NAME;
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd),
+ ts->product_name, sizeof(ts->product_name));
+ if (error)
+ dev_warn(&ts->client->dev,
+ "Failed to retrieve product name: %d\n", error);
+ else
+ dev_dbg(&ts->client->dev, "product name: %.*s\n",
+ (int)sizeof(ts->product_name), ts->product_name);
+
+ /* Firmware version */
+ error = mip4_get_fw_version(ts);
+ if (error)
+ dev_warn(&ts->client->dev,
+ "Failed to retrieve FW version: %d\n", error);
+ else
+ dev_dbg(&ts->client->dev, "F/W Version: %04X %04X %04X %04X\n",
+ ts->fw_version.boot, ts->fw_version.core,
+ ts->fw_version.app, ts->fw_version.param);
+
+ /* Resolution */
+ cmd[0] = MIP4_R0_INFO;
+ cmd[1] = MIP4_R1_INFO_RESOLUTION_X;
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 14);
+ if (error) {
+ dev_warn(&ts->client->dev,
+ "Failed to retrieve touchscreen parameters: %d\n",
+ error);
+ } else {
+ ts->max_x = get_unaligned_le16(&buf[0]);
+ ts->max_y = get_unaligned_le16(&buf[2]);
+ dev_dbg(&ts->client->dev, "max_x: %d, max_y: %d\n",
+ ts->max_x, ts->max_y);
+
+ ts->node_x = buf[4];
+ ts->node_y = buf[5];
+ ts->node_key = buf[6];
+ dev_dbg(&ts->client->dev,
+ "node_x: %d, node_y: %d, node_key: %d\n",
+ ts->node_x, ts->node_y, ts->node_key);
+
+ ts->ppm_x = buf[12];
+ ts->ppm_y = buf[13];
+ dev_dbg(&ts->client->dev, "ppm_x: %d, ppm_y: %d\n",
+ ts->ppm_x, ts->ppm_y);
+
+ /* Key ts */
+ if (ts->node_key > 0)
+ ts->key_num = ts->node_key;
+ }
+
+ /* Protocol */
+ cmd[0] = MIP4_R0_EVENT;
+ cmd[1] = MIP4_R1_EVENT_SUPPORTED_FUNC;
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), buf, 7);
+ if (error) {
+ dev_warn(&ts->client->dev,
+ "Failed to retrieve device type: %d\n", error);
+ ts->event_format = 0xff;
+ } else {
+ ts->event_format = get_unaligned_le16(&buf[4]);
+ ts->event_size = buf[6];
+ dev_dbg(&ts->client->dev, "event_format: %d, event_size: %d\n",
+ ts->event_format, ts->event_size);
+
+ if (ts->event_format == 2 || ts->event_format > 3)
+ dev_warn(&ts->client->dev,
+ "Unknown event format %d\n", ts->event_format);
+ }
+
+ return 0;
+}
+
+static int mip4_power_on(struct mip4_ts *ts)
+{
+ if (ts->gpio_ce) {
+ gpiod_set_value_cansleep(ts->gpio_ce, 1);
+
+ /* Booting delay : 200~300ms */
+ usleep_range(200 * 1000, 300 * 1000);
+ }
+
+ return 0;
+}
+
+static void mip4_power_off(struct mip4_ts *ts)
+{
+ if (ts->gpio_ce)
+ gpiod_set_value_cansleep(ts->gpio_ce, 0);
+}
+
+/*
+ * Clear touch input event status
+ */
+static void mip4_clear_input(struct mip4_ts *ts)
+{
+ int i;
+
+ /* Screen */
+ for (i = 0; i < MIP4_MAX_FINGERS; i++) {
+ input_mt_slot(ts->input, i);
+ input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0);
+ }
+
+ /* Keys */
+ for (i = 0; i < ts->key_num; i++)
+ input_report_key(ts->input, ts->key_code[i], 0);
+
+ input_sync(ts->input);
+}
+
+static int mip4_enable(struct mip4_ts *ts)
+{
+ int error;
+
+ error = mip4_power_on(ts);
+ if (error)
+ return error;
+
+ enable_irq(ts->client->irq);
+
+ return 0;
+}
+
+static void mip4_disable(struct mip4_ts *ts)
+{
+ disable_irq(ts->client->irq);
+
+ mip4_power_off(ts);
+
+ mip4_clear_input(ts);
+}
+
+/*****************************************************************
+ * Input handling
+ *****************************************************************/
+
+static void mip4_report_keys(struct mip4_ts *ts, u8 *packet)
+{
+ u8 key;
+ bool down;
+
+ switch (ts->event_format) {
+ case 0:
+ case 1:
+ key = packet[0] & 0x0F;
+ down = packet[0] & 0x80;
+ break;
+
+ case 3:
+ default:
+ key = packet[0] & 0x0F;
+ down = packet[1] & 0x01;
+ break;
+ }
+
+ /* Report key event */
+ if (key >= 1 && key <= ts->key_num) {
+ unsigned short keycode = ts->key_code[key - 1];
+
+ dev_dbg(&ts->client->dev,
+ "Key - ID: %d, keycode: %d, state: %d\n",
+ key, keycode, down);
+
+ input_event(ts->input, EV_MSC, MSC_SCAN, keycode);
+ input_report_key(ts->input, keycode, down);
+
+ } else {
+ dev_err(&ts->client->dev, "Unknown key: %d\n", key);
+ }
+}
+
+static void mip4_report_touch(struct mip4_ts *ts, u8 *packet)
+{
+ int id;
+ bool hover;
+ bool palm;
+ bool state;
+ u16 x, y;
+ u8 pressure_stage = 0;
+ u8 pressure;
+ u8 size;
+ u8 touch_major;
+ u8 touch_minor;
+
+ switch (ts->event_format) {
+ case 0:
+ case 1:
+ /* Touch only */
+ state = packet[0] & BIT(7);
+ hover = packet[0] & BIT(5);
+ palm = packet[0] & BIT(4);
+ id = (packet[0] & 0x0F) - 1;
+ x = ((packet[1] & 0x0F) << 8) | packet[2];
+ y = (((packet[1] >> 4) & 0x0F) << 8) |
+ packet[3];
+ pressure = packet[4];
+ size = packet[5];
+ if (ts->event_format == 0) {
+ touch_major = packet[5];
+ touch_minor = packet[5];
+ } else {
+ touch_major = packet[6];
+ touch_minor = packet[7];
+ }
+ break;
+
+ case 3:
+ default:
+ /* Touch + Force(Pressure) */
+ id = (packet[0] & 0x0F) - 1;
+ hover = packet[1] & BIT(2);
+ palm = packet[1] & BIT(1);
+ state = packet[1] & BIT(0);
+ x = ((packet[2] & 0x0F) << 8) | packet[3];
+ y = (((packet[2] >> 4) & 0x0F) << 8) |
+ packet[4];
+ size = packet[6];
+ pressure_stage = (packet[7] & 0xF0) >> 4;
+ pressure = ((packet[7] & 0x0F) << 8) |
+ packet[8];
+ touch_major = packet[9];
+ touch_minor = packet[10];
+ break;
+ }
+
+ dev_dbg(&ts->client->dev,
+ "Screen - Slot: %d State: %d X: %04d Y: %04d Z: %d\n",
+ id, state, x, y, pressure);
+
+ if (unlikely(id < 0 || id >= MIP4_MAX_FINGERS)) {
+ dev_err(&ts->client->dev, "Screen - invalid slot ID: %d\n", id);
+ } else if (state) {
+ /* Press or Move event */
+ input_mt_slot(ts->input, id);
+ input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, true);
+ input_report_abs(ts->input, ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input, ABS_MT_POSITION_Y, y);
+ input_report_abs(ts->input, ABS_MT_PRESSURE, pressure);
+ input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, touch_major);
+ input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, touch_minor);
+ } else {
+ /* Release event */
+ input_mt_slot(ts->input, id);
+ input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, 0);
+ }
+
+ input_mt_sync_frame(ts->input);
+}
+
+static int mip4_handle_packet(struct mip4_ts *ts, u8 *packet)
+{
+ u8 type;
+
+ switch (ts->event_format) {
+ case 0:
+ case 1:
+ type = (packet[0] & 0x40) >> 6;
+ break;
+
+ case 3:
+ type = (packet[0] & 0xF0) >> 4;
+ break;
+
+ default:
+ /* Should not happen unless we have corrupted firmware */
+ return -EINVAL;
+ }
+
+ dev_dbg(&ts->client->dev, "Type: %d\n", type);
+
+ /* Report input event */
+ switch (type) {
+ case MIP4_EVENT_INPUT_TYPE_KEY:
+ mip4_report_keys(ts, packet);
+ break;
+
+ case MIP4_EVENT_INPUT_TYPE_SCREEN:
+ mip4_report_touch(ts, packet);
+ break;
+
+ default:
+ dev_err(&ts->client->dev, "Unknown event type: %d\n", type);
+ break;
+ }
+
+ return 0;
+}
+
+static irqreturn_t mip4_interrupt(int irq, void *dev_id)
+{
+ struct mip4_ts *ts = dev_id;
+ struct i2c_client *client = ts->client;
+ unsigned int i;
+ int error;
+ u8 cmd[2];
+ u8 size;
+ bool alert;
+
+ /* Read packet info */
+ cmd[0] = MIP4_R0_EVENT;
+ cmd[1] = MIP4_R1_EVENT_PACKET_INFO;
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, 1);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to read packet info: %d\n", error);
+ goto out;
+ }
+
+ size = ts->buf[0] & 0x7F;
+ alert = ts->buf[0] & BIT(7);
+ dev_dbg(&client->dev, "packet size: %d, alert: %d\n", size, alert);
+
+ /* Check size */
+ if (!size) {
+ dev_err(&client->dev, "Empty packet\n");
+ goto out;
+ }
+
+ /* Read packet data */
+ cmd[0] = MIP4_R0_EVENT;
+ cmd[1] = MIP4_R1_EVENT_PACKET_DATA;
+ error = mip4_i2c_xfer(ts, cmd, sizeof(cmd), ts->buf, size);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to read packet data: %d\n", error);
+ goto out;
+ }
+
+ if (alert) {
+ dev_dbg(&client->dev, "Alert: %d\n", ts->buf[0]);
+ } else {
+ for (i = 0; i < size; i += ts->event_size) {
+ error = mip4_handle_packet(ts, &ts->buf[i]);
+ if (error)
+ break;
+ }
+
+ input_sync(ts->input);
+ }
+
+out:
+ return IRQ_HANDLED;
+}
+
+static int mip4_input_open(struct input_dev *dev)
+{
+ struct mip4_ts *ts = input_get_drvdata(dev);
+
+ return mip4_enable(ts);
+}
+
+static void mip4_input_close(struct input_dev *dev)
+{
+ struct mip4_ts *ts = input_get_drvdata(dev);
+
+ mip4_disable(ts);
+}
+
+/*****************************************************************
+ * Firmware update
+ *****************************************************************/
+
+/* Firmware Info */
+#define MIP4_BL_PAGE_SIZE 512 /* 512 */
+#define MIP4_BL_PACKET_SIZE 512 /* 512, 256, 128, 64, ... */
+
+/*
+ * Firmware binary tail info
+ */
+
+struct mip4_bin_tail {
+ u8 tail_mark[4];
+ u8 chip_name[4];
+
+ __le32 bin_start_addr;
+ __le32 bin_length;
+
+ __le16 ver_boot;
+ __le16 ver_core;
+ __le16 ver_app;
+ __le16 ver_param;
+
+ u8 boot_start;
+ u8 boot_end;
+ u8 core_start;
+ u8 core_end;
+ u8 app_start;
+ u8 app_end;
+ u8 param_start;
+ u8 param_end;
+
+ u8 checksum_type;
+ u8 hw_category;
+
+ __le16 param_id;
+ __le32 param_length;
+ __le32 build_date;
+ __le32 build_time;
+
+ __le32 reserved1;
+ __le32 reserved2;
+ __le16 reserved3;
+ __le16 tail_size;
+ __le32 crc;
+} __packed;
+
+#define MIP4_BIN_TAIL_MARK "MBT\001"
+#define MIP4_BIN_TAIL_SIZE (sizeof(struct mip4_bin_tail))
+
+/*
+* Bootloader - Read status
+*/
+static int mip4_bl_read_status(struct mip4_ts *ts)
+{
+ u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_STATUS };
+ u8 result;
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .flags = 0,
+ .buf = cmd,
+ .len = sizeof(cmd),
+ }, {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .buf = &result,
+ .len = sizeof(result),
+ },
+ };
+ int ret;
+ int error;
+ int retry = 1000;
+
+ do {
+ ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg)) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to read bootloader status: %d\n",
+ error);
+ return error;
+ }
+
+ switch (result) {
+ case MIP4_BOOT_STATUS_DONE:
+ dev_dbg(&ts->client->dev, "%s - done\n", __func__);
+ return 0;
+
+ case MIP4_BOOT_STATUS_ERROR:
+ dev_err(&ts->client->dev, "Bootloader failure\n");
+ return -EIO;
+
+ case MIP4_BOOT_STATUS_BUSY:
+ dev_dbg(&ts->client->dev, "%s - Busy\n", __func__);
+ error = -EBUSY;
+ break;
+
+ default:
+ dev_err(&ts->client->dev,
+ "Unexpected bootloader status: %#02x\n",
+ result);
+ error = -EINVAL;
+ break;
+ }
+
+ usleep_range(1000, 2000);
+ } while (--retry);
+
+ return error;
+}
+
+/*
+* Bootloader - Change mode
+*/
+static int mip4_bl_change_mode(struct mip4_ts *ts, u8 mode)
+{
+ u8 mode_chg_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE, mode };
+ u8 mode_read_cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_MODE };
+ u8 result;
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .flags = 0,
+ .buf = mode_read_cmd,
+ .len = sizeof(mode_read_cmd),
+ }, {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .buf = &result,
+ .len = sizeof(result),
+ },
+ };
+ int retry = 10;
+ int ret;
+ int error;
+
+ do {
+ /* Send mode change command */
+ ret = i2c_master_send(ts->client,
+ mode_chg_cmd, sizeof(mode_chg_cmd));
+ if (ret != sizeof(mode_chg_cmd)) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send %d mode change: %d (%d)\n",
+ mode, error, ret);
+ return error;
+ }
+
+ dev_dbg(&ts->client->dev,
+ "Sent mode change request (mode: %d)\n", mode);
+
+ /* Wait */
+ msleep(1000);
+
+ /* Verify target mode */
+ ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg)) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to read device mode: %d\n", error);
+ return error;
+ }
+
+ dev_dbg(&ts->client->dev,
+ "Current device mode: %d, want: %d\n", result, mode);
+
+ if (result == mode)
+ return 0;
+
+ } while (--retry);
+
+ return -EIO;
+}
+
+/*
+ * Bootloader - Start bootloader mode
+ */
+static int mip4_bl_enter(struct mip4_ts *ts)
+{
+ return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_BOOT);
+}
+
+/*
+ * Bootloader - Exit bootloader mode
+ */
+static int mip4_bl_exit(struct mip4_ts *ts)
+{
+ return mip4_bl_change_mode(ts, MIP4_BOOT_MODE_APP);
+}
+
+static int mip4_bl_get_address(struct mip4_ts *ts, u16 *buf_addr)
+{
+ u8 cmd[] = { MIP4_R0_BOOT, MIP4_R1_BOOT_BUF_ADDR };
+ u8 result[sizeof(u16)];
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .flags = 0,
+ .buf = cmd,
+ .len = sizeof(cmd),
+ }, {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .buf = result,
+ .len = sizeof(result),
+ },
+ };
+ int ret;
+ int error;
+
+ ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg)) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to retrieve bootloader buffer address: %d\n",
+ error);
+ return error;
+ }
+
+ *buf_addr = get_unaligned_le16(result);
+ dev_dbg(&ts->client->dev,
+ "Bootloader buffer address %#04x\n", *buf_addr);
+
+ return 0;
+}
+
+static int mip4_bl_program_page(struct mip4_ts *ts, int offset,
+ const u8 *data, int length, u16 buf_addr)
+{
+ u8 cmd[6];
+ u8 *data_buf;
+ u16 buf_offset;
+ int ret;
+ int error;
+
+ dev_dbg(&ts->client->dev, "Writing page @%#06x (%d)\n",
+ offset, length);
+
+ if (length > MIP4_BL_PAGE_SIZE || length % MIP4_BL_PACKET_SIZE) {
+ dev_err(&ts->client->dev,
+ "Invalid page length: %d\n", length);
+ return -EINVAL;
+ }
+
+ data_buf = kmalloc(2 + MIP4_BL_PACKET_SIZE, GFP_KERNEL);
+ if (!data_buf)
+ return -ENOMEM;
+
+ /* Addr */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
+ put_unaligned_le32(offset, &cmd[2]);
+ ret = i2c_master_send(ts->client, cmd, 6);
+ if (ret != 6) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send write page address: %d\n", error);
+ goto out;
+ }
+
+ /* Size */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_SIZE;
+ put_unaligned_le32(length, &cmd[2]);
+ ret = i2c_master_send(ts->client, cmd, 6);
+ if (ret != 6) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send write page size: %d\n", error);
+ goto out;
+ }
+
+ /* Data */
+ for (buf_offset = 0;
+ buf_offset < length;
+ buf_offset += MIP4_BL_PACKET_SIZE) {
+ dev_dbg(&ts->client->dev,
+ "writing chunk at %#04x (size %d)\n",
+ buf_offset, MIP4_BL_PACKET_SIZE);
+ put_unaligned_be16(buf_addr + buf_offset, data_buf);
+ memcpy(&data_buf[2], &data[buf_offset], MIP4_BL_PACKET_SIZE);
+ ret = i2c_master_send(ts->client,
+ data_buf, 2 + MIP4_BL_PACKET_SIZE);
+ if (ret != 2 + MIP4_BL_PACKET_SIZE) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to read chunk at %#04x (size %d): %d\n",
+ buf_offset, MIP4_BL_PACKET_SIZE, error);
+ goto out;
+ }
+ }
+
+ /* Command */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_CMD;
+ cmd[2] = MIP4_BOOT_CMD_PROGRAM;
+ ret = i2c_master_send(ts->client, cmd, 3);
+ if (ret != 3) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send 'write' command: %d\n", error);
+ goto out;
+ }
+
+ /* Status */
+ error = mip4_bl_read_status(ts);
+
+out:
+ kfree(data_buf);
+ return error ? error : 0;
+}
+
+static int mip4_bl_verify_page(struct mip4_ts *ts, int offset,
+ const u8 *data, int length, int buf_addr)
+{
+ u8 cmd[8];
+ u8 *read_buf;
+ int buf_offset;
+ struct i2c_msg msg[] = {
+ {
+ .addr = ts->client->addr,
+ .flags = 0,
+ .buf = cmd,
+ .len = 2,
+ }, {
+ .addr = ts->client->addr,
+ .flags = I2C_M_RD,
+ .len = MIP4_BL_PACKET_SIZE,
+ },
+ };
+ int ret;
+ int error;
+
+ dev_dbg(&ts->client->dev, "Validating page @%#06x (%d)\n",
+ offset, length);
+
+ /* Addr */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_TARGET_ADDR;
+ put_unaligned_le32(offset, &cmd[2]);
+ ret = i2c_master_send(ts->client, cmd, 6);
+ if (ret != 6) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send read page address: %d\n", error);
+ return error;
+ }
+
+ /* Size */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_SIZE;
+ put_unaligned_le32(length, &cmd[2]);
+ ret = i2c_master_send(ts->client, cmd, 6);
+ if (ret != 6) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send read page size: %d\n", error);
+ return error;
+ }
+
+ /* Command */
+ cmd[0] = MIP4_R0_BOOT;
+ cmd[1] = MIP4_R1_BOOT_CMD;
+ cmd[2] = MIP4_BOOT_CMD_READ;
+ ret = i2c_master_send(ts->client, cmd, 3);
+ if (ret != 3) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to send 'read' command: %d\n", error);
+ return error;
+ }
+
+ /* Status */
+ error = mip4_bl_read_status(ts);
+ if (error)
+ return error;
+
+ /* Read */
+ msg[1].buf = read_buf = kmalloc(MIP4_BL_PACKET_SIZE, GFP_KERNEL);
+ if (!read_buf)
+ return -ENOMEM;
+
+ for (buf_offset = 0;
+ buf_offset < length;
+ buf_offset += MIP4_BL_PACKET_SIZE) {
+ dev_dbg(&ts->client->dev,
+ "reading chunk at %#04x (size %d)\n",
+ buf_offset, MIP4_BL_PACKET_SIZE);
+ put_unaligned_be16(buf_addr + buf_offset, cmd);
+ ret = i2c_transfer(ts->client->adapter, msg, ARRAY_SIZE(msg));
+ if (ret != ARRAY_SIZE(msg)) {
+ error = ret < 0 ? ret : -EIO;
+ dev_err(&ts->client->dev,
+ "Failed to read chunk at %#04x (size %d): %d\n",
+ buf_offset, MIP4_BL_PACKET_SIZE, error);
+ break;
+ }
+
+ if (memcmp(&data[buf_offset], read_buf, MIP4_BL_PACKET_SIZE)) {
+ dev_err(&ts->client->dev,
+ "Failed to validate chunk at %#04x (size %d)\n",
+ buf_offset, MIP4_BL_PACKET_SIZE);
+#if MIP4_FW_UPDATE_DEBUG
+ print_hex_dump(KERN_DEBUG,
+ MIP4_DEVICE_NAME " F/W File: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ data + offset, MIP4_BL_PACKET_SIZE,
+ false);
+ print_hex_dump(KERN_DEBUG,
+ MIP4_DEVICE_NAME " F/W Chip: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ read_buf, MIP4_BL_PAGE_SIZE, false);
+#endif
+ error = -EINVAL;
+ break;
+ }
+ }
+
+ kfree(read_buf);
+ return error ? error : 0;
+}
+
+/*
+ * Flash chip firmware
+ */
+static int mip4_flash_fw(struct mip4_ts *ts,
+ const u8 *fw_data, u32 fw_size, u32 fw_offset)
+{
+ struct i2c_client *client = ts->client;
+ int offset;
+ u16 buf_addr;
+ int error, error2;
+
+ /* Enter bootloader mode */
+ dev_dbg(&client->dev, "Entering bootloader mode\n");
+
+ error = mip4_bl_enter(ts);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to enter bootloader mode: %d\n",
+ error);
+ return error;
+ }
+
+ /* Read info */
+ error = mip4_bl_get_address(ts, &buf_addr);
+ if (error)
+ goto exit_bl;
+
+ /* Program & Verify */
+ dev_dbg(&client->dev,
+ "Program & Verify, page size: %d, packet size: %d\n",
+ MIP4_BL_PAGE_SIZE, MIP4_BL_PACKET_SIZE);
+
+ for (offset = fw_offset;
+ offset < fw_offset + fw_size;
+ offset += MIP4_BL_PAGE_SIZE) {
+ /* Program */
+ error = mip4_bl_program_page(ts, offset, fw_data + offset,
+ MIP4_BL_PAGE_SIZE, buf_addr);
+ if (error)
+ break;
+
+ /* Verify */
+ error = mip4_bl_verify_page(ts, offset, fw_data + offset,
+ MIP4_BL_PAGE_SIZE, buf_addr);
+ if (error)
+ break;
+ }
+
+exit_bl:
+ /* Exit bootloader mode */
+ dev_dbg(&client->dev, "Exiting bootloader mode\n");
+
+ error2 = mip4_bl_exit(ts);
+ if (error2) {
+ dev_err(&client->dev,
+ "Failed to exit bootloader mode: %d\n", error2);
+ if (!error)
+ error = error2;
+ }
+
+ /* Reset chip */
+ mip4_power_off(ts);
+ mip4_power_on(ts);
+
+ mip4_query_device(ts);
+
+ /* Refresh device parameters */
+ input_set_abs_params(ts->input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
+ input_set_abs_params(ts->input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
+ input_set_abs_params(ts->input, ABS_X, 0, ts->max_x, 0, 0);
+ input_set_abs_params(ts->input, ABS_Y, 0, ts->max_y, 0, 0);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
+ input_abs_set_res(ts->input, ABS_X, ts->ppm_x);
+ input_abs_set_res(ts->input, ABS_Y, ts->ppm_y);
+
+ return error ? error : 0;
+}
+
+static int mip4_parse_firmware(struct mip4_ts *ts, const struct firmware *fw,
+ u32 *fw_offset_start, u32 *fw_size,
+ const struct mip4_bin_tail **pfw_info)
+{
+ const struct mip4_bin_tail *fw_info;
+ struct mip4_fw_version fw_version;
+ u16 tail_size;
+
+ if (fw->size < MIP4_BIN_TAIL_SIZE) {
+ dev_err(&ts->client->dev,
+ "Invalid firmware, size mismatch (tail %zd vs %zd)\n",
+ MIP4_BIN_TAIL_SIZE, fw->size);
+ return -EINVAL;
+ }
+
+ fw_info = (const void *)&fw->data[fw->size - MIP4_BIN_TAIL_SIZE];
+
+#if MIP4_FW_UPDATE_DEBUG
+ print_hex_dump(KERN_ERR, MIP4_DEVICE_NAME " Bin Info: ",
+ DUMP_PREFIX_OFFSET, 16, 1, *fw_info, tail_size, false);
+#endif
+
+ tail_size = get_unaligned_le16(&fw_info->tail_size);
+ if (tail_size != MIP4_BIN_TAIL_SIZE) {
+ dev_err(&ts->client->dev,
+ "wrong tail size: %d (expected %zd)\n",
+ tail_size, MIP4_BIN_TAIL_SIZE);
+ return -EINVAL;
+ }
+
+ /* Check bin format */
+ if (memcmp(fw_info->tail_mark, MIP4_BIN_TAIL_MARK,
+ sizeof(fw_info->tail_mark))) {
+ dev_err(&ts->client->dev,
+ "unable to locate tail marker (%*ph vs %*ph)\n",
+ (int)sizeof(fw_info->tail_mark), fw_info->tail_mark,
+ (int)sizeof(fw_info->tail_mark), MIP4_BIN_TAIL_MARK);
+ return -EINVAL;
+ }
+
+ *fw_offset_start = get_unaligned_le32(&fw_info->bin_start_addr);
+ *fw_size = get_unaligned_le32(&fw_info->bin_length);
+
+ dev_dbg(&ts->client->dev,
+ "F/W Data offset: %#08x, size: %d\n",
+ *fw_offset_start, *fw_size);
+
+ if (*fw_size % MIP4_BL_PAGE_SIZE) {
+ dev_err(&ts->client->dev,
+ "encoded fw length %d is not multiple of pages (%d)\n",
+ *fw_size, MIP4_BL_PAGE_SIZE);
+ return -EINVAL;
+ }
+
+ if (fw->size != *fw_offset_start + *fw_size) {
+ dev_err(&ts->client->dev,
+ "Wrong firmware size, expected %d bytes, got %zd\n",
+ *fw_offset_start + *fw_size, fw->size);
+ return -EINVAL;
+ }
+
+ mip4_parse_fw_version((const u8 *)&fw_info->ver_boot, &fw_version);
+
+ dev_dbg(&ts->client->dev,
+ "F/W file version %04X %04X %04X %04X\n",
+ fw_version.boot, fw_version.core,
+ fw_version.app, fw_version.param);
+
+ dev_dbg(&ts->client->dev, "F/W chip version: %04X %04X %04X %04X\n",
+ ts->fw_version.boot, ts->fw_version.core,
+ ts->fw_version.app, ts->fw_version.param);
+
+ /* Check F/W type */
+ if (fw_version.boot != 0xEEEE && fw_version.boot != 0xFFFF &&
+ fw_version.core == 0xEEEE &&
+ fw_version.app == 0xEEEE &&
+ fw_version.param == 0xEEEE) {
+ dev_dbg(&ts->client->dev, "F/W type: Bootloader\n");
+ } else if (fw_version.boot == 0xEEEE &&
+ fw_version.core != 0xEEEE && fw_version.core != 0xFFFF &&
+ fw_version.app != 0xEEEE && fw_version.app != 0xFFFF &&
+ fw_version.param != 0xEEEE && fw_version.param != 0xFFFF) {
+ dev_dbg(&ts->client->dev, "F/W type: Main\n");
+ } else {
+ dev_err(&ts->client->dev, "Wrong firmware type\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mip4_execute_fw_update(struct mip4_ts *ts, const struct firmware *fw)
+{
+ const struct mip4_bin_tail *fw_info;
+ u32 fw_start_offset;
+ u32 fw_size;
+ int retires = 3;
+ int error;
+
+ error = mip4_parse_firmware(ts, fw,
+ &fw_start_offset, &fw_size, &fw_info);
+ if (error)
+ return error;
+
+ if (ts->input->users) {
+ disable_irq(ts->client->irq);
+ } else {
+ error = mip4_power_on(ts);
+ if (error)
+ return error;
+ }
+
+ /* Update firmware */
+ do {
+ error = mip4_flash_fw(ts, fw->data, fw_size, fw_start_offset);
+ if (!error)
+ break;
+ } while (--retires);
+
+ if (error)
+ dev_err(&ts->client->dev,
+ "Failed to flash firmware: %d\n", error);
+
+ /* Enable IRQ */
+ if (ts->input->users)
+ enable_irq(ts->client->irq);
+ else
+ mip4_power_off(ts);
+
+ return error ? error : 0;
+}
+
+static ssize_t mip4_sysfs_fw_update(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mip4_ts *ts = i2c_get_clientdata(client);
+ const struct firmware *fw;
+ int error;
+
+ error = request_firmware(&fw, MIP4_FW_NAME, dev);
+ if (error) {
+ dev_err(&ts->client->dev,
+ "Failed to retrieve firmware %s: %d\n",
+ MIP4_FW_NAME, error);
+ return error;
+ }
+
+ /*
+ * Take input mutex to prevent racing with itself and also with
+ * userspace opening and closing the device and also suspend/resume
+ * transitions.
+ */
+ mutex_lock(&ts->input->mutex);
+
+ error = mip4_execute_fw_update(ts, fw);
+
+ mutex_unlock(&ts->input->mutex);
+
+ release_firmware(fw);
+
+ if (error) {
+ dev_err(&ts->client->dev,
+ "Firmware update failed: %d\n", error);
+ return error;
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mip4_sysfs_fw_update);
+
+static ssize_t mip4_sysfs_read_fw_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mip4_ts *ts = i2c_get_clientdata(client);
+ size_t count;
+
+ /* Take lock to prevent racing with firmware update */
+ mutex_lock(&ts->input->mutex);
+
+ count = snprintf(buf, PAGE_SIZE, "%04X %04X %04X %04X\n",
+ ts->fw_version.boot, ts->fw_version.core,
+ ts->fw_version.app, ts->fw_version.param);
+
+ mutex_unlock(&ts->input->mutex);
+
+ return count;
+}
+
+static DEVICE_ATTR(fw_version, S_IRUGO, mip4_sysfs_read_fw_version, NULL);
+
+static ssize_t mip4_sysfs_read_hw_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mip4_ts *ts = i2c_get_clientdata(client);
+ size_t count;
+
+ /* Take lock to prevent racing with firmware update */
+ mutex_lock(&ts->input->mutex);
+
+ /*
+ * product_name shows the name or version of the hardware
+ * paired with current firmware in the chip.
+ */
+ count = snprintf(buf, PAGE_SIZE, "%.*s\n",
+ (int)sizeof(ts->product_name), ts->product_name);
+
+ mutex_unlock(&ts->input->mutex);
+
+ return count;
+}
+
+static DEVICE_ATTR(hw_version, S_IRUGO, mip4_sysfs_read_hw_version, NULL);
+
+static struct attribute *mip4_attrs[] = {
+ &dev_attr_fw_version.attr,
+ &dev_attr_hw_version.attr,
+ &dev_attr_update_fw.attr,
+ NULL,
+};
+
+static const struct attribute_group mip4_attr_group = {
+ .attrs = mip4_attrs,
+};
+
+static void mip4_sysfs_remove(void *_data)
+{
+ struct mip4_ts *ts = _data;
+
+ sysfs_remove_group(&ts->client->dev.kobj, &mip4_attr_group);
+}
+
+static int mip4_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct mip4_ts *ts;
+ struct input_dev *input;
+ int error;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "Not supported I2C adapter\n");
+ return -ENXIO;
+ }
+
+ ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ input = devm_input_allocate_device(&client->dev);
+ if (!input)
+ return -ENOMEM;
+
+ ts->client = client;
+ ts->input = input;
+
+ snprintf(ts->phys, sizeof(ts->phys),
+ "%s/input0", dev_name(&client->dev));
+
+ ts->gpio_ce = devm_gpiod_get_optional(&client->dev,
+ "ce", GPIOD_OUT_LOW);
+ if (IS_ERR(ts->gpio_ce)) {
+ error = PTR_ERR(ts->gpio_ce);
+ if (error != EPROBE_DEFER)
+ dev_err(&client->dev,
+ "Failed to get gpio: %d\n", error);
+ return error;
+ }
+
+ error = mip4_power_on(ts);
+ if (error)
+ return error;
+ error = mip4_query_device(ts);
+ mip4_power_off(ts);
+ if (error)
+ return error;
+
+ input->name = "MELFAS MIP4 Touchscreen";
+ input->phys = ts->phys;
+
+ input->id.bustype = BUS_I2C;
+ input->id.vendor = 0x13c5;
+
+ input->open = mip4_input_open;
+ input->close = mip4_input_close;
+
+ input_set_drvdata(input, ts);
+
+ input->keycode = ts->key_code;
+ input->keycodesize = sizeof(*ts->key_code);
+ input->keycodemax = ts->key_num;
+
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, ts->max_x, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, ts->max_y, 0, 0);
+ input_set_abs_params(input, ABS_MT_PRESSURE,
+ MIP4_PRESSURE_MIN, MIP4_PRESSURE_MAX, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR,
+ MIP4_TOUCH_MAJOR_MIN, MIP4_TOUCH_MAJOR_MAX, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MINOR,
+ MIP4_TOUCH_MINOR_MIN, MIP4_TOUCH_MINOR_MAX, 0, 0);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->ppm_x);
+ input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->ppm_y);
+
+ error = input_mt_init_slots(input, MIP4_MAX_FINGERS, INPUT_MT_DIRECT);
+ if (error)
+ return error;
+
+ i2c_set_clientdata(client, ts);
+
+ error = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, mip4_interrupt,
+ IRQF_ONESHOT, MIP4_DEVICE_NAME, ts);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to request interrupt %d: %d\n",
+ client->irq, error);
+ return error;
+ }
+
+ disable_irq(client->irq);
+
+ error = input_register_device(input);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to register input device: %d\n", error);
+ return error;
+ }
+
+ error = sysfs_create_group(&client->dev.kobj, &mip4_attr_group);
+ if (error) {
+ dev_err(&client->dev,
+ "Failed to create sysfs attribute group: %d\n", error);
+ return error;
+ }
+
+ error = devm_add_action(&client->dev, mip4_sysfs_remove, ts);
+ if (error) {
+ mip4_sysfs_remove(ts);
+ dev_err(&client->dev,
+ "Failed to install sysfs remoce action: %d\n", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused mip4_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mip4_ts *ts = i2c_get_clientdata(client);
+ struct input_dev *input = ts->input;
+
+ mutex_lock(&input->mutex);
+
+ if (device_may_wakeup(dev))
+ ts->wake_irq_enabled = enable_irq_wake(client->irq) == 0;
+ else if (input->users)
+ mip4_disable(ts);
+
+ mutex_unlock(&input->mutex);
+
+ return 0;
+}
+
+static int __maybe_unused mip4_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct mip4_ts *ts = i2c_get_clientdata(client);
+ struct input_dev *input = ts->input;
+
+ mutex_lock(&input->mutex);
+
+ if (ts->wake_irq_enabled)
+ disable_irq_wake(client->irq);
+ else if (input->users)
+ mip4_enable(ts);
+
+ mutex_unlock(&input->mutex);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mip4_pm_ops, mip4_suspend, mip4_resume);
+
+#ifdef CONFIG_OF
+static const struct of_device_id mip4_of_match[] = {
+ { .compatible = "melfas,"MIP4_DEVICE_NAME, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, mip4_of_match);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id mip4_acpi_match[] = {
+ { "MLFS0000", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, mip4_acpi_match);
+#endif
+
+static const struct i2c_device_id mip4_i2c_ids[] = {
+ { MIP4_DEVICE_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, mip4_i2c_ids);
+
+static struct i2c_driver mip4_driver = {
+ .id_table = mip4_i2c_ids,
+ .probe = mip4_probe,
+ .driver = {
+ .name = MIP4_DEVICE_NAME,
+ .of_match_table = of_match_ptr(mip4_of_match),
+ .acpi_match_table = ACPI_PTR(mip4_acpi_match),
+ .pm = &mip4_pm_ops,
+ },
+};
+module_i2c_driver(mip4_driver);
+
+MODULE_DESCRIPTION("MELFAS MIP4 Touchscreen");
+MODULE_VERSION("2016.03.12");
+MODULE_AUTHOR("Sangwon Jee <jeesw@melfas.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index e414d43e5159..2a78e27b4495 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -63,6 +63,37 @@
#define STMPE_TS_NAME "stmpe-ts"
#define XY_MASK 0xfff
+/**
+ * struct stmpe_touch - stmpe811 touch screen controller state
+ * @stmpe: pointer back to STMPE MFD container
+ * @idev: registered input device
+ * @work: a work item used to scan the device
+ * @dev: a pointer back to the MFD cell struct device*
+ * @sample_time: ADC converstion time in number of clock.
+ * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
+ * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
+ * recommended is 4.
+ * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
+ * @ref_sel: ADC reference source
+ * (0 -> internal reference, 1 -> external reference)
+ * @adc_freq: ADC Clock speed
+ * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
+ * @ave_ctrl: Sample average control
+ * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
+ * @touch_det_delay: Touch detect interrupt delay
+ * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
+ * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
+ * recommended is 3
+ * @settling: Panel driver settling time
+ * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
+ * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
+ * recommended is 2
+ * @fraction_z: Length of the fractional part in z
+ * (fraction_z ([0..7]) = Count of the fractional part)
+ * recommended is 7
+ * @i_drive: current limit value of the touchscreen drivers
+ * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
+ */
struct stmpe_touch {
struct stmpe *stmpe;
struct input_dev *idev;
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index b6c4d03de340..880c40b23f66 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -197,28 +197,34 @@ static int sur40_command(struct sur40_state *dev,
static int sur40_init(struct sur40_state *dev)
{
int result;
- u8 buffer[24];
+ u8 *buffer;
+
+ buffer = kmalloc(24, GFP_KERNEL);
+ if (!buffer) {
+ result = -ENOMEM;
+ goto error;
+ }
/* stupidly replay the original MS driver init sequence */
result = sur40_command(dev, SUR40_GET_VERSION, 0x00, buffer, 12);
if (result < 0)
- return result;
+ goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x01, buffer, 12);
if (result < 0)
- return result;
+ goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x02, buffer, 12);
if (result < 0)
- return result;
+ goto error;
result = sur40_command(dev, SUR40_UNKNOWN2, 0x00, buffer, 24);
if (result < 0)
- return result;
+ goto error;
result = sur40_command(dev, SUR40_UNKNOWN1, 0x00, buffer, 5);
if (result < 0)
- return result;
+ goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x03, buffer, 12);
@@ -226,7 +232,8 @@ static int sur40_init(struct sur40_state *dev)
* Discard the result buffer - no known data inside except
* some version strings, maybe extract these sometime...
*/
-
+error:
+ kfree(buffer);
return result;
}
diff --git a/drivers/input/touchscreen/wdt87xx_i2c.c b/drivers/input/touchscreen/wdt87xx_i2c.c
index 515c20a6e10f..73861ad22df4 100644
--- a/drivers/input/touchscreen/wdt87xx_i2c.c
+++ b/drivers/input/touchscreen/wdt87xx_i2c.c
@@ -848,7 +848,7 @@ static int wdt87xx_do_update_firmware(struct i2c_client *client,
error = wdt87xx_get_sysparam(client, &wdt->param);
if (error)
dev_err(&client->dev,
- "failed to refresh system paramaters: %d\n", error);
+ "failed to refresh system parameters: %d\n", error);
out:
enable_irq(client->irq);
mutex_unlock(&wdt->fw_mutex);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.