// SPDX-License-Identifier: GPL-2.0-only
/*
* Logitech PS/2++ mouse driver
*
* Copyright (c) 1999-2003 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2003 Eric Wong <eric@yhbt.net>
*/
#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"
/* Logitech mouse types */
#define PS2PP_KIND_WHEEL 1
#define PS2PP_KIND_MX 2
#define PS2PP_KIND_TP3 3
#define PS2PP_KIND_TRACKMAN 4
/* Logitech mouse features */
#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;
u8 kind;
u16 features;
};
/*
* Process a PS2++ or PS2T++ packet.
*/
static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
u8 *packet = psmouse->packet;
if (psmouse->pktcnt < 3 )
return PSMOUSE_GOOD_DATA;
/*
* Full packet accumulated, process it
*/
if ((packet[0 ] & 0 x48) == 0 x48 && (packet[1 ] & 0 x02) == 0 x02) {
/* Logitech extended packet */
switch ((packet[1 ] >> 4 ) | (packet[0 ] & 0 x30)) {
case 0 x0d: /* Mouse extra info */
input_report_rel(dev,
packet[2 ] & 0 x80 ? 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 0 x0e: /* buttons 4, 5, 6, 7, 8, 9, 10 info */
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 0 x0f: /* TouchPad extra info */
input_report_rel(dev,
packet[2 ] & 0 x08 ? REL_HWHEEL : REL_WHEEL,
-sign_extend32(packet[2 ] >> 4 , 3 ));
packet[0 ] = packet[2 ] | BIT(3 );
break ;
default :
psmouse_dbg(psmouse,
"Received PS2++ packet #%x, but don't know how to handle.\n" ,
(packet[1 ] >> 4 ) | (packet[0 ] & 0 x30));
break ;
}
psmouse_report_standard_buttons(dev, packet[0 ]);
} else {
/* Standard PS/2 motion data */
psmouse_report_standard_packet(dev, packet);
}
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
/*
* ps2pp_cmd() sends a PS2++ command, sliced into two bit
* pieces through the SETRES command. This is needed to send extended
* commands to mice on notebooks that try to understand the PS/2 protocol
* Ugly.
*/
static int ps2pp_cmd(struct psmouse *psmouse, u8 *param, u8 command)
{
int error;
error = ps2_sliced_command(&psmouse->ps2dev, command);
if (error)
return error;
error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0 x0300);
if (error)
return error;
return 0 ;
}
/*
* SmartScroll / CruiseControl for some newer Logitech mice Defaults to
* enabled if we do nothing to it. Of course I put this in because I want it
* disabled :P
* 1 - enabled (if previously disabled, also default)
* 0 - disabled
*/
static void ps2pp_set_smartscroll(struct psmouse *psmouse, bool smartscroll)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[4 ];
ps2pp_cmd(psmouse, param, 0 x32);
param[0 ] = 0 ;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
param[0 ] = smartscroll;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
}
static ssize_t ps2pp_attr_show_smartscroll(struct psmouse *psmouse,
void *data, char *buf)
{
return sprintf(buf, "%d\n" , psmouse->smartscroll);
}
static ssize_t ps2pp_attr_set_smartscroll(struct psmouse *psmouse, void *data,
const char *buf, size_t count)
{
unsigned int value;
int err;
err = kstrtouint(buf, 10 , &value);
if (err)
return err;
if (value > 1 )
return -EINVAL;
ps2pp_set_smartscroll(psmouse, value);
psmouse->smartscroll = value;
return count;
}
PSMOUSE_DEFINE_ATTR(smartscroll, S_IWUSR | S_IRUGO, NULL,
ps2pp_attr_show_smartscroll, ps2pp_attr_set_smartscroll);
/*
* Support 800 dpi resolution _only_ if the user wants it (there are good
* reasons to not use it even if the mouse supports it, and of course there are
* also good reasons to use it, let the user decide).
*/
static void ps2pp_set_resolution(struct psmouse *psmouse,
unsigned int resolution)
{
if (resolution > 400 ) {
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param = 3 ;
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES);
psmouse->resolution = 800 ;
} else
psmouse_set_resolution(psmouse, resolution);
}
static void ps2pp_disconnect(struct psmouse *psmouse)
{
device_remove_file(&psmouse->ps2dev.serio->dev,
&psmouse_attr_smartscroll.dattr);
}
static const struct ps2pp_info *get_model_info(unsigned char model)
{
static const struct ps2pp_info ps2pp_list[] = {
{ 1 , 0 , 0 }, /* Simple 2-button mouse */
{ 12 , 0 , PS2PP_SIDE_BTN},
{ 13 , 0 , 0 },
{ 15 , PS2PP_KIND_MX, /* MX1000 */
PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
PS2PP_EXTRA_BTN | PS2PP_NAV_BTN | PS2PP_HWHEEL },
{ 40 , 0 , PS2PP_SIDE_BTN },
{ 41 , 0 , PS2PP_SIDE_BTN },
{ 42 , 0 , PS2PP_SIDE_BTN },
{ 43 , 0 , PS2PP_SIDE_BTN },
{ 50 , 0 , 0 },
{ 51 , 0 , 0 },
{ 52 , PS2PP_KIND_WHEEL, PS2PP_SIDE_BTN | PS2PP_WHEEL },
{ 53 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 56 , PS2PP_KIND_WHEEL, PS2PP_SIDE_BTN | PS2PP_WHEEL }, /* Cordless MouseMan Wheel */
{ 61 , PS2PP_KIND_MX, /* MX700 */
PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
{ 66 , PS2PP_KIND_MX, /* MX3100 receiver */
PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
PS2PP_EXTRA_BTN | PS2PP_NAV_BTN | PS2PP_HWHEEL },
{ 72 , PS2PP_KIND_TRACKMAN, 0 }, /* T-CH11: TrackMan Marble */
{ 73 , PS2PP_KIND_TRACKMAN, PS2PP_SIDE_BTN }, /* TrackMan FX */
{ 75 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 76 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 79 , PS2PP_KIND_TRACKMAN, PS2PP_WHEEL }, /* TrackMan with wheel */
{ 80 , PS2PP_KIND_WHEEL, PS2PP_SIDE_BTN | PS2PP_WHEEL },
{ 81 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 83 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 85 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 86 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 87 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 88 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 96 , 0 , 0 },
{ 97 , PS2PP_KIND_TP3, PS2PP_WHEEL | PS2PP_HWHEEL },
{ 99 , PS2PP_KIND_WHEEL, PS2PP_WHEEL },
{ 100 , PS2PP_KIND_MX, /* MX510 */
PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
{ 111 , PS2PP_KIND_MX, PS2PP_WHEEL | PS2PP_SIDE_BTN }, /* MX300 reports task button as side */
{ 112 , PS2PP_KIND_MX, /* MX500 */
PS2PP_WHEEL | PS2PP_SIDE_BTN | PS2PP_TASK_BTN |
PS2PP_EXTRA_BTN | PS2PP_NAV_BTN },
{ 114 , PS2PP_KIND_MX, /* MX310 */
PS2PP_WHEEL | PS2PP_SIDE_BTN |
PS2PP_TASK_BTN | PS2PP_EXTRA_BTN }
};
int i;
for (i = 0 ; i < ARRAY_SIZE(ps2pp_list); i++)
if (model == ps2pp_list[i].model)
return &ps2pp_list[i];
return NULL;
}
/*
* Set up input device's properties based on the detected mouse model.
*/
static void ps2pp_set_model_properties(struct psmouse *psmouse,
const struct ps2pp_info *model_info,
bool using_ps2pp)
{
struct input_dev *input_dev = psmouse->dev;
if (model_info->features & PS2PP_SIDE_BTN)
input_set_capability(input_dev, EV_KEY, BTN_SIDE);
if (model_info->features & PS2PP_EXTRA_BTN)
input_set_capability(input_dev, EV_KEY, BTN_EXTRA);
if (model_info->features & PS2PP_TASK_BTN)
input_set_capability(input_dev, EV_KEY, BTN_TASK);
if (model_info->features & PS2PP_NAV_BTN) {
input_set_capability(input_dev, EV_KEY, BTN_FORWARD);
input_set_capability(input_dev, EV_KEY, BTN_BACK);
}
if (model_info->features & PS2PP_WHEEL)
input_set_capability(input_dev, EV_REL, REL_WHEEL);
if (model_info->features & PS2PP_HWHEEL)
input_set_capability(input_dev, EV_REL, REL_HWHEEL);
switch (model_info->kind) {
case PS2PP_KIND_WHEEL:
psmouse->name = "Wheel Mouse" ;
break ;
case PS2PP_KIND_MX:
psmouse->name = "MX Mouse" ;
break ;
case PS2PP_KIND_TP3:
psmouse->name = "TouchPad 3" ;
break ;
case PS2PP_KIND_TRACKMAN:
psmouse->name = "TrackMan" ;
break ;
default :
/*
* Set name to "Mouse" only when using PS2++,
* otherwise let other protocols define suitable
* name
*/
if (using_ps2pp)
psmouse->name = "Mouse" ;
break ;
}
}
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
* and its exact model and try turning on extended protocol for ones
* that support it.
*/
int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
const struct ps2pp_info *model_info;
u8 param[4 ];
u8 model, buttons;
bool use_ps2pp = false ;
int error;
param[0 ] = 0 ;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
param[1 ] = 0 ;
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
model = ((param[0 ] >> 4 ) & 0 x07) | ((param[0 ] << 3 ) & 0 x78);
buttons = param[1 ];
if (!model || !buttons)
return -ENXIO;
model_info = get_model_info(model);
if (model_info) {
/*
* Do Logitech PS2++ / PS2T++ magic init.
*/
if (model_info->kind == PS2PP_KIND_TP3) { /* Touch Pad 3 */
/* Unprotect RAM */
param[0 ] = 0 x11; param[1 ] = 0 x04; param[2 ] = 0 x68;
ps2_command(ps2dev, param, 0 x30d1);
/* Enable features */
param[0 ] = 0 x11; param[1 ] = 0 x05; param[2 ] = 0 x0b;
ps2_command(ps2dev, param, 0 x30d1);
/* Enable PS2++ */
param[0 ] = 0 x11; param[1 ] = 0 x09; param[2 ] = 0 xc3;
ps2_command(ps2dev, param, 0 x30d1);
param[0 ] = 0 ;
if (!ps2_command(ps2dev, param, 0 x13d1) &&
param[0 ] == 0 x06 && param[1 ] == 0 x00 &&
param[2 ] == 0 x14) {
use_ps2pp = true ;
}
} else {
param[0 ] = param[1 ] = param[2 ] = 0 ;
ps2pp_cmd(psmouse, param, 0 x39); /* Magic knock */
ps2pp_cmd(psmouse, param, 0 xDB);
if ((param[0 ] & 0 x78) == 0 x48 &&
(param[1 ] & 0 xf3) == 0 xc2 &&
(param[2 ] & 0 x03) == ((param[1 ] >> 2 ) & 3 )) {
ps2pp_set_smartscroll(psmouse, false );
use_ps2pp = true ;
}
}
} else {
psmouse_warn(psmouse,
"Detected unknown Logitech mouse model %d\n" ,
model);
}
if (set_properties) {
psmouse->vendor = "Logitech" ;
psmouse->model = model;
if (use_ps2pp) {
error = ps2pp_setup_protocol(psmouse, model_info);
if (error)
return error;
}
if (buttons >= 3 )
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 : -ENXIO;
}
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