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Commit 23fce365 authored by Paul Donohue's avatar Paul Donohue Committed by Dmitry Torokhov
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Input: ALPS - clean up code for SS5 hardware 



The return value of alps_get_pkt_id_ss4_v2() should really be "enum
SS4_PACKET_ID", not "unsigned char".  Correct this.

Also, most of the Alps SS5 (SS4 v2) packet byte parsing code is implemented
using macros, but there are a few places where bytes are directly
manipulated in alps.c.  For consistency, migrate the rest of these to
macros.

Reviewed-by: default avatarPali Rohár <pali.rohar@gmail.com>
Signed-off-by: default avatarPaul Donohue <linux-kernel@PaulSD.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 7229c58c

drivers/input/mouse/alps.c

+7 −14
Original line number Diff line number Diff line
@@ -1153,15 +1153,13 @@ static void alps_process_packet_v7(struct psmouse *psmouse) 
		alps_process_touchpad_packet_v7(psmouse);

}



static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)

static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)

{

	unsigned char pkt_id = SS4_PACKET_ID_IDLE;

	enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;



	switch (byte[3] & 0x30) {

	case 0x00:

		if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&

		    (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 &&

		    byte[5] == 0x00) {

		if (SS4_IS_IDLE_V2(byte)) {

			pkt_id = SS4_PACKET_ID_IDLE;

		} else {

			pkt_id = SS4_PACKET_ID_ONE;
@@ -1188,7 +1186,7 @@ static int alps_decode_ss4_v2(struct alps_fields *f, 
			      unsigned char *p, struct psmouse *psmouse)

{

	struct alps_data *priv = psmouse->private;

	unsigned char pkt_id;

	enum SS4_PACKET_ID pkt_id;

	unsigned int no_data_x, no_data_y;



	pkt_id = alps_get_pkt_id_ss4_v2(p);
@@ -1306,7 +1304,6 @@ static void alps_process_packet_ss4_v2(struct psmouse *psmouse) 
	struct input_dev *dev = psmouse->dev;

	struct input_dev *dev2 = priv->dev2;

	struct alps_fields *f = &priv->f;

	int x, y, pressure;



	memset(f, 0, sizeof(struct alps_fields));

	priv->decode_fields(f, packet, psmouse);
@@ -1349,13 +1346,9 @@ static void alps_process_packet_ss4_v2(struct psmouse *psmouse) 
			return;

		}



		x = (s8)(((packet[0] & 1) << 7) | (packet[1] & 0x7f));

		y = (s8)(((packet[3] & 1) << 7) | (packet[2] & 0x7f));

		pressure = (s8)(packet[4] & 0x7f);



		input_report_rel(dev2, REL_X, x);

		input_report_rel(dev2, REL_Y, -y);

		input_report_abs(dev2, ABS_PRESSURE, pressure);

		input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));

		input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));

		input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));



		input_report_key(dev2, BTN_LEFT, f->ts_left);

		input_report_key(dev2, BTN_RIGHT, f->ts_right);

drivers/input/mouse/alps.h

+21 −1
Original line number Diff line number Diff line
@@ -54,7 +54,15 @@ enum SS4_PACKET_ID { 


#define SS4_MASK_NORMAL_BUTTONS		0x07



#define SS4_1F_X_V2(_b)		((_b[0] & 0x0007) |		\

#define SS4_IS_IDLE_V2(_b)	(((_b[0]) == 0x18) &&		\

				 ((_b[1]) == 0x10) &&		\

				 ((_b[2]) == 0x00) &&		\

				 ((_b[3] & 0x88) == 0x08) &&	\

				 ((_b[4]) == 0x10) &&		\

				 ((_b[5]) == 0x00)		\

				)



#define SS4_1F_X_V2(_b)		(((_b[0]) & 0x0007) |		\

				 ((_b[1] << 3) & 0x0078) |	\

				 ((_b[1] << 2) & 0x0380) |	\

				 ((_b[2] << 5) & 0x1C00)	\
@@ -101,6 +109,18 @@ enum SS4_PACKET_ID { 
#define SS4_IS_MF_CONTINUE(_b)	((_b[2] & 0x10) == 0x10)

#define SS4_IS_5F_DETECTED(_b)	((_b[2] & 0x10) == 0x10)



#define SS4_TS_X_V2(_b)		(s8)(				\

				 ((_b[0] & 0x01) << 7) |	\

				 (_b[1] & 0x7F)		\

				)



#define SS4_TS_Y_V2(_b)		(s8)(				\

				 ((_b[3] & 0x01) << 7) |	\

				 (_b[2] & 0x7F)		\

				)



#define SS4_TS_Z_V2(_b)		(s8)(_b[4] & 0x7F)





#define SS4_MFPACKET_NO_AX	8160	/* X-Coordinate value */

#define SS4_MFPACKET_NO_AY	4080	/* Y-Coordinate value */