Input: penmount - add PenMount 6000 support

Add support for PenMount 6000 touch controller.

Signed-off-by: John Sung <penmount.touch@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/touchscreen/penmount.c b/drivers/input/touchscreen/penmount.c
index 3342c6d8e57dcf9f9af2b6586a94da0abb8e4ef2..e9117adcf6df01b74faf7abf860bae43f10d047f 100644 (file)
--- a/drivers/input/touchscreen/penmount.c
+++ b/drivers/input/touchscreen/penmount.c
@@ -33,7 +33,7 @@ MODULE_LICENSE("GPL");
  * Definitions & global arrays.
  */
 
-#define        PM_MAX_LENGTH   5
+#define        PM_MAX_LENGTH   6
 
 /*
  * Per-touchscreen data.
@@ -45,8 +45,24 @@ struct pm {
        int idx;
        unsigned char data[PM_MAX_LENGTH];
        char phys[32];
+       unsigned char packetsize;
 };
 
+/*
+ * pm_checkpacket() checks if data packet is valid
+ */
+
+static bool pm_checkpacket(unsigned char *packet)
+{
+       int total = 0;
+       int i;
+
+       for (i = 0; i < 5; i++)
+               total += packet[i];
+
+       return packet[5] == (unsigned char)~(total & 0xff);
+}
+
 static irqreturn_t pm_interrupt(struct serio *serio,
                unsigned char data, unsigned int flags)
 {
@@ -55,14 +71,34 @@ static irqreturn_t pm_interrupt(struct serio *serio,
 
        pm->data[pm->idx] = data;
 
-       if (pm->data[0] & 0x80) {
-               if (PM_MAX_LENGTH == ++pm->idx) {
-                       input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
-                       input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
-                       input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
-                       input_sync(dev);
-                       pm->idx = 0;
+       switch (pm->dev->id.product) {
+       case 0x9000:
+               if (pm->data[0] & 0x80) {
+                       if (pm->packetsize == ++pm->idx) {
+                               input_report_abs(dev, ABS_X, pm->data[1] * 128 + pm->data[2]);
+                               input_report_abs(dev, ABS_Y, pm->data[3] * 128 + pm->data[4]);
+                               input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
+                               input_sync(dev);
+                               pm->idx = 0;
+                       }
+               }
+               break;
+
+       case 0x6000:
+               if ((pm->data[0] & 0xbf) == 0x30) {
+                       if (pm->packetsize == ++pm->idx) {
+                               if (pm_checkpacket(pm->data)) {
+                                       input_report_abs(dev, ABS_X,
+                                                       pm->data[2] * 256 + pm->data[1]);
+                                       input_report_abs(dev, ABS_Y,
+                                                       pm->data[4] * 256 + pm->data[3]);
+                                       input_report_key(dev, BTN_TOUCH, !!(pm->data[0] & 0x40));
+                                       input_sync(dev);
+                               }
+                               pm->idx = 0;
+                       }
                }
+               break;
        }
 
        return IRQ_HANDLED;
@@ -120,6 +156,19 @@ static int pm_connect(struct serio *serio, struct serio_driver *drv)
         input_set_abs_params(pm->dev, ABS_X, 0, 0x3ff, 0, 0);
         input_set_abs_params(pm->dev, ABS_Y, 0, 0x3ff, 0, 0);
 
+       switch (serio->id.id) {
+       default:
+       case 0:
+               pm->packetsize = 5;
+               input_dev->id.product = 0x9000;
+               break;
+
+       case 1:
+               pm->packetsize = 6;
+               input_dev->id.product = 0x6000;
+               break;
+       }
+
        serio_set_drvdata(serio, pm);
 
        err = serio_open(serio, drv);