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Commit 592c352b authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

Input: logips2pp - clean up code 



- switch to using BIT() macros
- use u8 instead of unsigned char for byte data
- use input_set_capability() instead of manipulating capabilities bits
  directly
- use sign_extend32() when extracting wheel data.
- do not abuse -1 as error code, propagate errors from various calls.

Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent ba667650

drivers/input/mouse/logips2pp.c

+83 −59
Original line number Diff line number Diff line
@@ -9,9 +9,11 @@ 
 * the Free Software Foundation.

 */



#include <linux/bitops.h>

#include <linux/input.h>

#include <linux/serio.h>

#include <linux/libps2.h>

#include <linux/types.h>

#include "psmouse.h"

#include "logips2pp.h"
@@ -22,12 +24,12 @@ 
#define PS2PP_KIND_TRACKMAN	4



/* Logitech mouse features */

#define PS2PP_WHEEL		0x01

#define PS2PP_HWHEEL		0x02

#define PS2PP_SIDE_BTN		0x04

#define PS2PP_EXTRA_BTN		0x08

#define PS2PP_TASK_BTN		0x10

#define PS2PP_NAV_BTN		0x20

#define PS2PP_WHEEL		BIT(0)

#define PS2PP_HWHEEL		BIT(1)

#define PS2PP_SIDE_BTN		BIT(2)

#define PS2PP_EXTRA_BTN		BIT(3)

#define PS2PP_TASK_BTN		BIT(4)

#define PS2PP_NAV_BTN		BIT(5)



struct ps2pp_info {

	u8 model;
@@ -42,7 +44,7 @@ struct ps2pp_info { 
static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)

{

	struct input_dev *dev = psmouse->dev;

	unsigned char *packet = psmouse->packet;

	u8 *packet = psmouse->packet;



	if (psmouse->pktcnt < 3)

		return PSMOUSE_GOOD_DATA;
@@ -58,28 +60,30 @@ static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse) 


		case 0x0d: /* Mouse extra info */



			input_report_rel(dev, packet[2] & 0x80 ? REL_HWHEEL : REL_WHEEL,

				(int) (packet[2] & 8) - (int) (packet[2] & 7));

			input_report_key(dev, BTN_SIDE, (packet[2] >> 4) & 1);

			input_report_key(dev, BTN_EXTRA, (packet[2] >> 5) & 1);

			input_report_rel(dev,

				packet[2] & 0x80 ? REL_HWHEEL : REL_WHEEL,

				-sign_extend32(packet[2], 3));

			input_report_key(dev, BTN_SIDE,  packet[2] & BIT(4));

			input_report_key(dev, BTN_EXTRA, packet[2] & BIT(5));



			break;



		case 0x0e: /* buttons 4, 5, 6, 7, 8, 9, 10 info */



			input_report_key(dev, BTN_SIDE, (packet[2]) & 1);

			input_report_key(dev, BTN_EXTRA, (packet[2] >> 1) & 1);

			input_report_key(dev, BTN_BACK, (packet[2] >> 3) & 1);

			input_report_key(dev, BTN_FORWARD, (packet[2] >> 4) & 1);

			input_report_key(dev, BTN_TASK, (packet[2] >> 2) & 1);

			input_report_key(dev, BTN_SIDE,    packet[2] & BIT(0));

			input_report_key(dev, BTN_EXTRA,   packet[2] & BIT(1));

			input_report_key(dev, BTN_TASK,    packet[2] & BIT(2));

			input_report_key(dev, BTN_BACK,    packet[2] & BIT(3));

			input_report_key(dev, BTN_FORWARD, packet[2] & BIT(4));



			break;



		case 0x0f: /* TouchPad extra info */



			input_report_rel(dev, packet[2] & 0x08 ? REL_HWHEEL : REL_WHEEL,

				(int) ((packet[2] >> 4) & 8) - (int) ((packet[2] >> 4) & 7));

			packet[0] = packet[2] | 0x08;

			input_report_rel(dev,

				packet[2] & 0x08 ? REL_HWHEEL : REL_WHEEL,

				-sign_extend32(packet[2] >> 4, 3));

			packet[0] = packet[2] | BIT(3);

			break;



		default:
@@ -109,13 +113,17 @@ static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse) 
 * Ugly.

 */



static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned char command)

static int ps2pp_cmd(struct psmouse *psmouse, u8 *param, u8 command)

{

	if (psmouse_sliced_command(psmouse, command))

		return -1;

	int error;



	error = psmouse_sliced_command(psmouse, command);

	if (error)

		return error;



	if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300))

		return -1;

	error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300);

	if (error)

		return error;



	return 0;

}
@@ -131,7 +139,7 @@ static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned cha 
static void ps2pp_set_smartscroll(struct psmouse *psmouse, bool smartscroll)

{

	struct ps2dev *ps2dev = &psmouse->ps2dev;

	unsigned char param[4];

	u8 param[4];



	ps2pp_cmd(psmouse, param, 0x32);
@@ -177,11 +185,12 @@ PSMOUSE_DEFINE_ATTR(smartscroll, S_IWUSR | S_IRUGO, NULL, 
 * also good reasons to use it, let the user decide).

 */



static void ps2pp_set_resolution(struct psmouse *psmouse, unsigned int resolution)

static void ps2pp_set_resolution(struct psmouse *psmouse,

				 unsigned int resolution)

{

	if (resolution > 400) {

		struct ps2dev *ps2dev = &psmouse->ps2dev;

		unsigned char param = 3;

		u8 param = 3;



		ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);

		ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
@@ -194,7 +203,8 @@ static void ps2pp_set_resolution(struct psmouse *psmouse, unsigned int resolutio 


static void ps2pp_disconnect(struct psmouse *psmouse)

{

	device_remove_file(&psmouse->ps2dev.serio->dev, &psmouse_attr_smartscroll.dattr);

	device_remove_file(&psmouse->ps2dev.serio->dev,

			   &psmouse_attr_smartscroll.dattr);

}



static const struct ps2pp_info *get_model_info(unsigned char model)
@@ -267,24 +277,24 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse, 
	struct input_dev *input_dev = psmouse->dev;



	if (model_info->features & PS2PP_SIDE_BTN)

		__set_bit(BTN_SIDE, input_dev->keybit);

		input_set_capability(input_dev, EV_KEY, BTN_SIDE);



	if (model_info->features & PS2PP_EXTRA_BTN)

		__set_bit(BTN_EXTRA, input_dev->keybit);

		input_set_capability(input_dev, EV_KEY, BTN_EXTRA);



	if (model_info->features & PS2PP_TASK_BTN)

		__set_bit(BTN_TASK, input_dev->keybit);

		input_set_capability(input_dev, EV_KEY, BTN_TASK);



	if (model_info->features & PS2PP_NAV_BTN) {

		__set_bit(BTN_FORWARD, input_dev->keybit);

		__set_bit(BTN_BACK, input_dev->keybit);

		input_set_capability(input_dev, EV_KEY, BTN_FORWARD);

		input_set_capability(input_dev, EV_KEY, BTN_BACK);

	}



	if (model_info->features & PS2PP_WHEEL)

		__set_bit(REL_WHEEL, input_dev->relbit);

		input_set_capability(input_dev, EV_REL, REL_WHEEL);



	if (model_info->features & PS2PP_HWHEEL)

		__set_bit(REL_HWHEEL, input_dev->relbit);

		input_set_capability(input_dev, EV_REL, REL_HWHEEL);



	switch (model_info->kind) {
@@ -316,6 +326,30 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse, 
	}

}



static int ps2pp_setup_protocol(struct psmouse *psmouse,

				const struct ps2pp_info *model_info)

{

	int error;



	psmouse->protocol_handler = ps2pp_process_byte;

	psmouse->pktsize = 3;



	if (model_info->kind != PS2PP_KIND_TP3) {

		psmouse->set_resolution = ps2pp_set_resolution;

		psmouse->disconnect = ps2pp_disconnect;



		error = device_create_file(&psmouse->ps2dev.serio->dev,

					   &psmouse_attr_smartscroll.dattr);

		if (error) {

			psmouse_err(psmouse,

				    "failed to create smartscroll sysfs attribute, error: %d\n",

				    error);

			return error;

		}

	}



	return 0;

}



/*

 * Logitech magic init. Detect whether the mouse is a Logitech one
@@ -326,9 +360,9 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse, 
int ps2pp_detect(struct psmouse *psmouse, bool set_properties)

{

	struct ps2dev *ps2dev = &psmouse->ps2dev;

	unsigned char param[4];

	unsigned char model, buttons;

	const struct ps2pp_info *model_info;

	u8 param[4];

	u8 model, buttons;

	bool use_ps2pp = false;

	int error;
@@ -344,7 +378,7 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties) 
	buttons = param[1];



	if (!model || !buttons)

		return -1;

		return -ENXIO;



	model_info = get_model_info(model);

	if (model_info) {
@@ -366,7 +400,8 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties) 


			param[0] = 0;

			if (!ps2_command(ps2dev, param, 0x13d1) &&

			    param[0] == 0x06 && param[1] == 0x00 && param[2] == 0x14) {

			    param[0] == 0x06 && param[1] == 0x00 &&

			    param[2] == 0x14) {

				use_ps2pp = true;

			}
@@ -385,7 +420,9 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties) 
		}



	} else {

		psmouse_warn(psmouse, "Detected unknown Logitech mouse model %d\n", model);

		psmouse_warn(psmouse,

			     "Detected unknown Logitech mouse model %d\n",

			     model);

	}



	if (set_properties) {
@@ -393,31 +430,18 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties) 
		psmouse->model = model;



		if (use_ps2pp) {

			psmouse->protocol_handler = ps2pp_process_byte;

			psmouse->pktsize = 3;



			if (model_info->kind != PS2PP_KIND_TP3) {

				psmouse->set_resolution = ps2pp_set_resolution;

				psmouse->disconnect = ps2pp_disconnect;



				error = device_create_file(&ps2dev->serio->dev,

							   &psmouse_attr_smartscroll.dattr);

				if (error) {

					psmouse_err(psmouse,

						    "failed to create smartscroll sysfs attribute, error: %d\n",

						    error);

					return -1;

				}

			}

			error = ps2pp_setup_protocol(psmouse, model_info);

			if (error)

				return error;

		}



		if (buttons >= 3)

			__set_bit(BTN_MIDDLE, psmouse->dev->keybit);

			input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);



		if (model_info)

			ps2pp_set_model_properties(psmouse, model_info, use_ps2pp);

	}



	return use_ps2pp ? 0 : -1;

	return use_ps2pp ? 0 : -ENXIO;

}