staging: ste_rmi4: Convert to Type-B support

Convert to MT-B because Synaptics touch devices are capable
of tracking identifiable fingers.

Signed-off-by: Alexandra Chin <alexandra.chin@tw.synaptics.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
index 37d19c6..c71366d 100644 (file)
--- a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
+++ b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
@@ -31,6 +31,7 @@
 #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 */
@@ -67,7 +68,6 @@
 #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_DEVICE_CONTROL_FUNC_NUM (0x01)
 
@@ -164,6 +164,7 @@ 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 +185,7 @@ struct synaptics_rmi4_data {
        struct regulator        *regulator;
        wait_queue_head_t       wait;
        bool                    touch_stopped;
+       unsigned char           fingers_supported;
 };
 
 /**
@@ -303,22 +305,21 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
        /* 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 +334,6 @@ 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,
@@ -358,7 +358,11 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
                 * 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 +371,33 @@ 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;
 }
@@ -575,6 +562,7 @@ 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)
@@ -988,6 +976,8 @@ 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, 0);
 
        /* Clear interrupts */
        synaptics_rmi4_i2c_block_read(rmi4_data,