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Subject[PATCH 1/3] Input: penmount - add PenMount 6000 support
Date
Add support for PenMount 6000 touch controller.

Signed-off-by: John Sung <penmount.touch@gmail.com>
---
drivers/input/touchscreen/penmount.c | 64 +++++++++++++++++++++++++++++----
1 files changed, 56 insertions(+), 8 deletions(-)
diff --git a/drivers/input/touchscreen/penmount.c b/drivers/input/touchscreen/penmount.c
index 3342c6d..240f6a2 100644
--- 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 +45,25 @@ 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 int pm_checkpacket(unsigned char *packet) {
+ int i = 0;
+ int total = 0;
+ for (i = 0; i < 5; i++)
+ total += packet[i];
+
+ if (packet[5] == (unsigned char)~(total & 0xff))
+ return 1;
+
+ return 0;
+}
+
static irqreturn_t pm_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
@@ -55,14 +72,33 @@ 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 +156,18 @@ 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);
--
1.7.4.1


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