Convert to MT-B because Synaptics touch devices are capable
of tracking identifiable fingers.
Signed-off-by: Alexandra Chin <alexandra.chin@xxxxxxxxxxxxxxxx>
---
Changes from v5:
- Incorporated Henrik's review comments
*rollback to v3 from v4
*fix odd line break in v3
- Include Alexandra in the list of authors
Changes from v4:
- Incorporated Henrik's review comments
*split function synpatics_rmi4_touchscreen_report
*split function synaptics_rmi4_i2c_query_device
Changes from v3:
- Incorporated Henrik's review comments
*remove 'else' after an error path return
*add input_mt_sync_frame() for pointer emulation effects
*correct names of touchscreen
- Replace printk with dev_err
Changes from v2:
- Incorporated Henrik's review comments
*directly report finger state with Type-B
- Against 3.7-rcX
*call input_mt_init_slots with INPUT_MT_DIRECT flag
---
drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c | 245 ++++++++++++-------------
1 files changed, 114 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
index 277491a..7b636c7 100644
--- a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
+++ b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
@@ -1,10 +1,11 @@
/**
*
- * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver.
- * Copyright (c) 2007-2010, Synaptics Incorporated
+ * Synaptics Register Mapped Interface (RMI4) I2C Touchscreen Driver.
+ * Copyright (c) 2007-2012, Synaptics Incorporated
*
* Author: Js HA <js.ha@xxxxxxxxxxxxxx> for ST-Ericsson
* Author: Naveen Kumar G <naveen.gaddipati@xxxxxxxxxxxxxx> for ST-Ericsson
+ * Author: Alexandra Chin <alexandra.chin@xxxxxxxxxxxxxxxx>
* Copyright 2010 (c) ST-Ericsson AB
*/
/*
@@ -31,6 +32,7 @@
#include <linux/interrupt.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
+#include <linux/input/mt.h>
#include "synaptics_i2c_rmi4.h"
/* TODO: for multiple device support will need a per-device mutex */
@@ -63,12 +65,11 @@
#define MASK_4BIT 0x0F
#define MASK_3BIT 0x07
#define MASK_2BIT 0x03
-#define TOUCHPAD_CTRL_INTR 0x8
+#define TOUCHSCREEN_CTRL_INTR 0x8
#define PDT_START_SCAN_LOCATION (0x00E9)
#define PDT_END_SCAN_LOCATION (0x000A)
#define PDT_ENTRY_SIZE (0x0006)
-#define RMI4_NUMBER_OF_MAX_FINGERS (8)
-#define SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM (0x11)
+#define SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM (0x11)
#define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM (0x01)
/**
@@ -164,6 +165,7 @@ struct synaptics_rmi4_device_info {
* @regulator: pointer to the regulator structure
* @wait: wait queue structure variable
* @touch_stopped: flag to stop the thread function
+ * @fingers_supported: maximum supported fingers
*
* This structure gives the device data information.
*/
@@ -184,6 +186,7 @@ struct synaptics_rmi4_data {
struct regulator *regulator;
wait_queue_head_t wait;
bool touch_stopped;
+ unsigned char fingers_supported;
};
/**
@@ -291,34 +294,33 @@ exit:
}
/**
- * synpatics_rmi4_touchpad_report() - reports for the rmi4 touchpad device
+ * synpatics_rmi4_touchscreen_report() - reports for the rmi4 touchscreen device
* @pdata: pointer to synaptics_rmi4_data structure
* @rfi: pointer to synaptics_rmi4_fn structure
*
- * This function calls to reports for the rmi4 touchpad device
+ * This function calls to reports for the rmi4 touchscreen device
*/
-static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
+static int synpatics_rmi4_touchscreen_report(struct synaptics_rmi4_data *pdata,
struct synaptics_rmi4_fn *rfi)
{
/* number of touch points - fingers down in this case */
int touch_count = 0;
int finger;
- int fingers_supported;
int finger_registers;
int reg;
int finger_shift;
int finger_status;
int retval;
+ int x, y;
+ int wx, wy;
unsigned short data_base_addr;
unsigned short data_offset;
unsigned char data_reg_blk_size;
unsigned char values[2];
unsigned char data[DATA_LEN];
- int x[RMI4_NUMBER_OF_MAX_FINGERS];
- int y[RMI4_NUMBER_OF_MAX_FINGERS];
- int wx[RMI4_NUMBER_OF_MAX_FINGERS];
- int wy[RMI4_NUMBER_OF_MAX_FINGERS];
+ unsigned char fingers_supported = pdata->fingers_supported;
struct i2c_client *client = pdata->i2c_client;
+ struct input_dev *input_dev = pdata->input_dev;
/* get 2D sensor finger data */
/*
@@ -333,7 +335,6 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
* 10 = finger present but data may not be accurate,
* 11 = reserved for product use.
*/
- fingers_supported = rfi->num_of_data_points;
finger_registers = (fingers_supported + 3)/4;
data_base_addr = rfi->fn_desc.data_base_addr;
retval = synaptics_rmi4_i2c_block_read(pdata, data_base_addr, values,
@@ -353,12 +354,16 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
reg = finger/4;
/* bit shift to get finger's status */
finger_shift = (finger % 4) * 2;
- finger_status = (values[reg] >> finger_shift) & 3;
+ finger_status = (values[reg] >> finger_shift) & MASK_2BIT;
/*
* if finger status indicates a finger is present then
* read the finger data and report it
*/
- if (finger_status == 1 || finger_status == 2) {
+ input_mt_slot(input_dev, finger);
+ input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
+ finger_status != 0);
+
+ if (finger_status) {
/* Read the finger data */
data_offset = data_base_addr +
((finger * data_reg_blk_size) +
@@ -367,50 +372,33 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
data_offset, data,
data_reg_blk_size);
if (retval != data_reg_blk_size) {
- printk(KERN_ERR "%s:read data failed\n",
+ dev_err(&client->dev, "%s:read data failed\n",
__func__);
return 0;
- } else {
- x[touch_count] =
- (data[0] << 4) | (data[2] & MASK_4BIT);
- y[touch_count] =
- (data[1] << 4) |
- ((data[2] >> 4) & MASK_4BIT);
- wy[touch_count] =
- (data[3] >> 4) & MASK_4BIT;
- wx[touch_count] =
- (data[3] & MASK_4BIT);
-
- if (pdata->board->x_flip)
- x[touch_count] =
- pdata->sensor_max_x -
- x[touch_count];
- if (pdata->board->y_flip)
- y[touch_count] =
- pdata->sensor_max_y -
- y[touch_count];
}
+ x = (data[0] << 4) | (data[2] & MASK_4BIT);
+ y = (data[1] << 4) | ((data[2] >> 4) & MASK_4BIT);
+ wy = (data[3] >> 4) & MASK_4BIT;
+ wx = (data[3] & MASK_4BIT);
+
+ if (pdata->board->x_flip)
+ x = pdata->sensor_max_x - x;
+ if (pdata->board->y_flip)
+ y = pdata->sensor_max_y - y;
+
+ input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+ max(wx, wy));
+ input_report_abs(input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
+
/* number of active touch points */
touch_count++;
}
}
- /* report to input subsystem */
- if (touch_count) {
- for (finger = 0; finger < touch_count; finger++) {
- input_report_abs(pdata->input_dev, ABS_MT_TOUCH_MAJOR,
- max(wx[finger] , wy[finger]));
- input_report_abs(pdata->input_dev, ABS_MT_POSITION_X,
- x[finger]);
- input_report_abs(pdata->input_dev, ABS_MT_POSITION_Y,
- y[finger]);
- input_mt_sync(pdata->input_dev);
- }
- } else
- input_mt_sync(pdata->input_dev);
-
/* sync after groups of events */
- input_sync(pdata->input_dev);
+ input_mt_sync_frame(input_dev);
+ input_sync(input_dev);
/* return the number of touch points */
return touch_count;
}
@@ -428,13 +416,13 @@ static int synaptics_rmi4_report_device(struct synaptics_rmi4_data *pdata,
int touch = 0;
struct i2c_client *client = pdata->i2c_client;
static int num_error_reports;
- if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) {
+ if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM) {
num_error_reports++;
if (num_error_reports < MAX_ERROR_REPORT)
dev_err(&client->dev, "%s:report not supported\n",
__func__);
} else
- touch = synpatics_rmi4_touchpad_report(pdata, rfi);
+ touch = synpatics_rmi4_touchscreen_report(pdata, rfi);
return touch;
}
/**
@@ -510,15 +498,15 @@ static irqreturn_t synaptics_rmi4_irq(int irq, void *data)
}
/**
- * synpatics_rmi4_touchpad_detect() - detects the rmi4 touchpad device
+ * synpatics_rmi4_touchscreen_detect() - detects the rmi4 touchscreen device
* @pdata: pointer to synaptics_rmi4_data structure
* @rfi: pointer to synaptics_rmi4_fn structure
* @fd: pointer to synaptics_rmi4_fn_desc structure
* @interruptcount: count the number of interrupts
*
- * This function calls to detects the rmi4 touchpad device
+ * This function calls to detects the rmi4 touchscreen device
*/
-static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata,
+static int synpatics_rmi4_touchscreen_detect(struct synaptics_rmi4_data *pdata,
struct synaptics_rmi4_fn *rfi,
struct synaptics_rmi4_fn_desc *fd,
unsigned int interruptcount)
@@ -575,6 +563,7 @@ static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata,
if ((queries[1] & MASK_3BIT) == 5)
rfi->num_of_data_points = 10;
}
+ pdata->fingers_supported = rfi->num_of_data_points;
/* Need to get interrupt info for handling interrupts */
rfi->index_to_intr_reg = (interruptcount + 7)/8;
if (rfi->index_to_intr_reg != 0)
@@ -655,13 +644,13 @@ static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata,
}
/**
- * synaptics_rmi4_touchpad_config() - configures the rmi4 touchpad device
+ * synaptics_rmi4_touchscreen_config() - configures the rmi4 touchscreen device
* @pdata: pointer to synaptics_rmi4_data structure
* @rfi: pointer to synaptics_rmi4_fn structure
*
- * This function calls to configures the rmi4 touchpad device
+ * This function calls to configures the rmi4 touchscreen device
*/
-int synaptics_rmi4_touchpad_config(struct synaptics_rmi4_data *pdata,
+int synaptics_rmi4_touchscreen_config(struct synaptics_rmi4_data *pdata,
struct synaptics_rmi4_fn *rfi)
{
/*
@@ -741,51 +730,7 @@ static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata)
return -EIO;
}
rfi = NULL;
- if (rmi_fd.fn_number) {
- switch (rmi_fd.fn_number & MASK_8BIT) {
- case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM:
- pdata->fn01_query_base_addr =
- rmi_fd.query_base_addr;
- pdata->fn01_ctrl_base_addr =
- rmi_fd.ctrl_base_addr;
- pdata->fn01_data_base_addr =
- rmi_fd.data_base_addr;
- break;
- case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM:
- if (rmi_fd.intr_src_count) {
- rfi = kmalloc(sizeof(*rfi),
- GFP_KERNEL);
- if (!rfi) {
- dev_err(&client->dev,
- "%s:kmalloc failed\n",
- __func__);
- return -ENOMEM;
- }
- retval = synpatics_rmi4_touchpad_detect
- (pdata, rfi,
- &rmi_fd,
- intr_count);
- if (retval < 0) {
- kfree(rfi);
- return retval;
- }
- }
- break;
- }
- /* interrupt count for next iteration */
- intr_count += (rmi_fd.intr_src_count & MASK_3BIT);
- /*
- * We only want to add functions to the list
- * that have data associated with them.
- */
- if (rfi && rmi_fd.intr_src_count) {
- /* link this function info to the RMI module */
- mutex_lock(&(pdata->fn_list_mutex));
- list_add_tail(&rfi->link,
- &pdata->rmi4_mod_info.support_fn_list);
- mutex_unlock(&(pdata->fn_list_mutex));
- }
- } else {
+ if (!rmi_fd.fn_number) {
/*
* A zero in the function number
* signals the end of the PDT
@@ -794,6 +739,47 @@ static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata)
"%s:end of PDT\n", __func__);
break;
}
+ switch (rmi_fd.fn_number & MASK_8BIT) {
+ case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM:
+ pdata->fn01_query_base_addr =
+ rmi_fd.query_base_addr;
+ pdata->fn01_ctrl_base_addr =
+ rmi_fd.ctrl_base_addr;
+ pdata->fn01_data_base_addr =
+ rmi_fd.data_base_addr;
+ break;
+ case SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM:
+ if (rmi_fd.intr_src_count) {
+ rfi = kmalloc(sizeof(*rfi), GFP_KERNEL);
+ if (!rfi) {
+ dev_err(&client->dev,
+ "%s:kmalloc failed\n",
+ __func__);
+ return -ENOMEM;
+ }
+ retval = synpatics_rmi4_touchscreen_detect(
+ pdata, rfi, &rmi_fd,
+ intr_count);
+ if (retval < 0) {
+ kfree(rfi);
+ return retval;
+ }
+ }
+ break;
+ }
+ /* interrupt count for next iteration */
+ intr_count += (rmi_fd.intr_src_count & MASK_3BIT);
+ /*
+ * We only want to add functions to the list
+ * that have data associated with them.
+ */
+ if (rfi && rmi_fd.intr_src_count) {
+ /* link this function info to the RMI module */
+ mutex_lock(&(pdata->fn_list_mutex));
+ list_add_tail(&rfi->link,
+ &pdata->rmi4_mod_info.support_fn_list);
+ mutex_unlock(&(pdata->fn_list_mutex));
+ }
}
/*
* calculate the interrupt register count - used in the
@@ -849,33 +835,28 @@ static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata)
list_for_each_entry(rfi, &pdata->rmi4_mod_info.support_fn_list, link)
data_sources += rfi->num_of_data_sources;
- if (data_sources) {
- rmi = &(pdata->rmi4_mod_info);
- list_for_each_entry(rfi, &rmi->support_fn_list, link) {
- if (rfi->num_of_data_sources) {
- if (rfi->fn_number ==
- SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) {
- retval = synaptics_rmi4_touchpad_config
- (pdata, rfi);
- if (retval < 0)
- return retval;
- } else
- dev_err(&client->dev,
- "%s:fn_number not supported\n",
+ if (!data_sources)
+ return 0;
+ rmi = &(pdata->rmi4_mod_info);
+ list_for_each_entry(rfi, &rmi->support_fn_list, link) {
+ if (!rfi->num_of_data_sources)
+ continue;
+ if (rfi->fn_number == SYNAPTICS_RMI4_TOUCHSCREEN_FUNC_NUM) {
+ retval = synaptics_rmi4_touchscreen_config(pdata, rfi);
+ if (retval < 0)
+ return retval;
+ } else
+ dev_err(&client->dev, "%s:fn_number not supported\n",
__func__);
- /*
- * Turn on interrupts for this
- * function's data sources.
- */
- ctrl_offset = pdata->fn01_ctrl_base_addr + 1 +
- rfi->index_to_intr_reg;
- retval = synaptics_rmi4_i2c_byte_write(pdata,
- ctrl_offset,
+ /*
+ * Turn on interrupts for this function's data sources.
+ */
+ ctrl_offset = pdata->fn01_ctrl_base_addr + 1 +
+ rfi->index_to_intr_reg;
+ retval = synaptics_rmi4_i2c_byte_write(pdata, ctrl_offset,
rfi->intr_mask);
- if (retval < 0)
- return retval;
- }
- }
+ if (retval < 0)
+ return retval;
}
return 0;
}
@@ -988,6 +969,8 @@ static int __devinit synaptics_rmi4_probe
rmi4_data->sensor_max_y, 0, 0);
input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0,
MAX_TOUCH_MAJOR, 0, 0);
+ input_mt_init_slots(rmi4_data->input_dev,
+ rmi4_data->fingers_supported, INPUT_MT_DIRECT);
/* Clear interrupts */
synaptics_rmi4_i2c_block_read(rmi4_data,
@@ -1076,7 +1059,7 @@ static int synaptics_rmi4_suspend(struct device *dev)
retval = synaptics_rmi4_i2c_byte_write(rmi4_data,
rmi4_data->fn01_ctrl_base_addr + 1,
- (intr_status & ~TOUCHPAD_CTRL_INTR));
+ (intr_status & ~TOUCHSCREEN_CTRL_INTR));
if (retval < 0)
return retval;
@@ -1112,7 +1095,7 @@ static int synaptics_rmi4_resume(struct device *dev)
retval = synaptics_rmi4_i2c_byte_write(rmi4_data,
rmi4_data->fn01_ctrl_base_addr + 1,
- (intr_status | TOUCHPAD_CTRL_INTR));
+ (intr_status | TOUCHSCREEN_CTRL_INTR));
if (retval < 0)
return retval;
--
1.7.5.4
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