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linux_dsm_epyc7002/drivers/input/mouse/psmouse-base.c
Dmitry Torokhov aaca981e45 Input: i8042 - signal wakeup from atkbd/psmouse 
Instead of signalling wakeup directly from i8042, let psmouse and atkbd
drivers execute basic protocol handling and only then signal wakeup
condition. This solves the issue where we increment wakeup counter
simply because we are getting responses from keyboard/mouse to the
commands we ourselves send to them as part of suspend transition.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2019-04-04 11:51:26 -07:00

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/*
* PS/2 mouse driver
*
* Copyright (c) 1999-2002 Vojtech Pavlik
* Copyright (c) 2003-2004 Dmitry Torokhov
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#define psmouse_fmt(fmt) fmt
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/libps2.h>
#include <linux/mutex.h>
#include <linux/types.h>
#include "psmouse.h"
#include "synaptics.h"
#include "logips2pp.h"
#include "alps.h"
#include "hgpk.h"
#include "lifebook.h"
#include "trackpoint.h"
#include "touchkit_ps2.h"
#include "elantech.h"
#include "sentelic.h"
#include "cypress_ps2.h"
#include "focaltech.h"
#include "vmmouse.h"
#include "byd.h"
#define DRIVER_DESC "PS/2 mouse driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
static const struct kernel_param_ops param_ops_proto_abbrev = {
.set = psmouse_set_maxproto,
.get = psmouse_get_maxproto,
};
#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
static unsigned int psmouse_resolution = 200;
module_param_named(resolution, psmouse_resolution, uint, 0644);
MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
static unsigned int psmouse_rate = 100;
module_param_named(rate, psmouse_rate, uint, 0644);
MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
static bool psmouse_smartscroll = true;
module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
static bool psmouse_a4tech_2wheels;
module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
static unsigned int psmouse_resetafter = 5;
module_param_named(resetafter, psmouse_resetafter, uint, 0644);
MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
static unsigned int psmouse_resync_time;
module_param_named(resync_time, psmouse_resync_time, uint, 0644);
MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
NULL,
psmouse_attr_show_protocol, psmouse_attr_set_protocol);
PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, rate),
psmouse_show_int_attr, psmouse_attr_set_rate);
PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resolution),
psmouse_show_int_attr, psmouse_attr_set_resolution);
PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resetafter),
psmouse_show_int_attr, psmouse_set_int_attr);
PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
(void *) offsetof(struct psmouse, resync_time),
psmouse_show_int_attr, psmouse_set_int_attr);
static struct attribute *psmouse_attributes[] = {
&psmouse_attr_protocol.dattr.attr,
&psmouse_attr_rate.dattr.attr,
&psmouse_attr_resolution.dattr.attr,
&psmouse_attr_resetafter.dattr.attr,
&psmouse_attr_resync_time.dattr.attr,
NULL
};
static const struct attribute_group psmouse_attribute_group = {
.attrs = psmouse_attributes,
};
/*
* psmouse_mutex protects all operations changing state of mouse
* (connecting, disconnecting, changing rate or resolution via
* sysfs). We could use a per-device semaphore but since there
* rarely more than one PS/2 mouse connected and since semaphore
* is taken in "slow" paths it is not worth it.
*/
static DEFINE_MUTEX(psmouse_mutex);
static struct workqueue_struct *kpsmoused_wq;
void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
{
input_report_key(dev, BTN_LEFT, buttons & BIT(0));
input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
}
void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
{
int x, y;
x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
input_report_rel(dev, REL_X, x);
input_report_rel(dev, REL_Y, -y);
}
void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
{
psmouse_report_standard_buttons(dev, packet[0]);
psmouse_report_standard_motion(dev, packet);
}
/*
* psmouse_process_byte() analyzes the PS/2 data stream and reports
* relevant events to the input module once full packet has arrived.
*/
psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
u8 *packet = psmouse->packet;
int wheel;
if (psmouse->pktcnt < psmouse->pktsize)
return PSMOUSE_GOOD_DATA;
/* Full packet accumulated, process it */
switch (psmouse->protocol->type) {
case PSMOUSE_IMPS:
/* IntelliMouse has scroll wheel */
input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
break;
case PSMOUSE_IMEX:
/* Scroll wheel and buttons on IntelliMouse Explorer */
switch (packet[3] & 0xC0) {
case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
input_report_rel(dev, REL_WHEEL,
-sign_extend32(packet[3], 5));
break;
case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
input_report_rel(dev, REL_HWHEEL,
-sign_extend32(packet[3], 5));
break;
case 0x00:
case 0xC0:
wheel = sign_extend32(packet[3], 3);
/*
* Some A4Tech mice have two scroll wheels, with first
* one reporting +/-1 in the lower nibble, and second
* one reporting +/-2.
*/
if (psmouse_a4tech_2wheels && abs(wheel) > 1)
input_report_rel(dev, REL_HWHEEL, wheel / 2);
else
input_report_rel(dev, REL_WHEEL, -wheel);
input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
break;
}
break;
case PSMOUSE_GENPS:
/* Report scroll buttons on NetMice */
input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
/* Extra buttons on Genius NewNet 3D */
input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
break;
case PSMOUSE_THINKPS:
/* Extra button on ThinkingMouse */
input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
/*
* Without this bit of weirdness moving up gives wildly
* high Y changes.
*/
packet[1] |= (packet[0] & 0x40) << 1;
break;
case PSMOUSE_CORTRON:
/*
* Cortron PS2 Trackball reports SIDE button in the
* 4th bit of the first byte.
*/
input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
packet[0] |= BIT(3);
break;
default:
break;
}
/* Generic PS/2 Mouse */
packet[0] |= psmouse->extra_buttons;
psmouse_report_standard_packet(dev, packet);
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
unsigned long delay)
{
queue_delayed_work(kpsmoused_wq, work, delay);
}
/*
* __psmouse_set_state() sets new psmouse state and resets all flags.
*/
static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
{
psmouse->state = new_state;
psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
psmouse->ps2dev.flags = 0;
psmouse->last = jiffies;
}
/*
* psmouse_set_state() sets new psmouse state and resets all flags and
* counters while holding serio lock so fighting with interrupt handler
* is not a concern.
*/
void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
{
serio_pause_rx(psmouse->ps2dev.serio);
__psmouse_set_state(psmouse, new_state);
serio_continue_rx(psmouse->ps2dev.serio);
}
/*
* psmouse_handle_byte() processes one byte of the input data stream
* by calling corresponding protocol handler.
*/
static int psmouse_handle_byte(struct psmouse *psmouse)
{
psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
switch (rc) {
case PSMOUSE_BAD_DATA:
if (psmouse->state == PSMOUSE_ACTIVATED) {
psmouse_warn(psmouse,
"%s at %s lost sync at byte %d\n",
psmouse->name, psmouse->phys,
psmouse->pktcnt);
if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse_notice(psmouse,
"issuing reconnect request\n");
serio_reconnect(psmouse->ps2dev.serio);
return -EIO;
}
}
psmouse->pktcnt = 0;
break;
case PSMOUSE_FULL_PACKET:
psmouse->pktcnt = 0;
if (psmouse->out_of_sync_cnt) {
psmouse->out_of_sync_cnt = 0;
psmouse_notice(psmouse,
"%s at %s - driver resynced.\n",
psmouse->name, psmouse->phys);
}
break;
case PSMOUSE_GOOD_DATA:
break;
}
return 0;
}
static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
{
switch (psmouse->oob_data_type) {
case PSMOUSE_OOB_NONE:
psmouse->oob_data_type = data;
break;
case PSMOUSE_OOB_EXTRA_BTNS:
psmouse_report_standard_buttons(psmouse->dev, data);
input_sync(psmouse->dev);
psmouse->extra_buttons = data;
psmouse->oob_data_type = PSMOUSE_OOB_NONE;
break;
default:
psmouse_warn(psmouse,
"unknown OOB_DATA type: 0x%02x\n",
psmouse->oob_data_type);
psmouse->oob_data_type = PSMOUSE_OOB_NONE;
break;
}
}
/*
* psmouse_interrupt() handles incoming characters, either passing them
* for normal processing or gathering them as command response.
*/
static irqreturn_t psmouse_interrupt(struct serio *serio,
u8 data, unsigned int flags)
{
struct psmouse *psmouse = serio_get_drvdata(serio);
if (psmouse->state == PSMOUSE_IGNORE)
goto out;
if (unlikely((flags & SERIO_TIMEOUT) ||
((flags & SERIO_PARITY) &&
!psmouse->protocol->ignore_parity))) {
if (psmouse->state == PSMOUSE_ACTIVATED)
psmouse_warn(psmouse,
"bad data from KBC -%s%s\n",
flags & SERIO_TIMEOUT ? " timeout" : "",
flags & SERIO_PARITY ? " bad parity" : "");
ps2_cmd_aborted(&psmouse->ps2dev);
goto out;
}
if (flags & SERIO_OOB_DATA) {
psmouse_handle_oob_data(psmouse, data);
goto out;
}
if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
if (ps2_handle_ack(&psmouse->ps2dev, data))
goto out;
if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
if (ps2_handle_response(&psmouse->ps2dev, data))
goto out;
pm_wakeup_event(&serio->dev, 0);
if (psmouse->state <= PSMOUSE_RESYNCING)
goto out;
if (psmouse->state == PSMOUSE_ACTIVATED &&
psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
psmouse->name, psmouse->phys, psmouse->pktcnt);
psmouse->badbyte = psmouse->packet[0];
__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
goto out;
}
psmouse->packet[psmouse->pktcnt++] = data;
/* Check if this is a new device announcement (0xAA 0x00) */
if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
if (psmouse->pktcnt == 1) {
psmouse->last = jiffies;
goto out;
}
if (psmouse->packet[1] == PSMOUSE_RET_ID ||
(psmouse->protocol->type == PSMOUSE_HGPK &&
psmouse->packet[1] == PSMOUSE_RET_BAT)) {
__psmouse_set_state(psmouse, PSMOUSE_IGNORE);
serio_reconnect(serio);
goto out;
}
/* Not a new device, try processing first byte normally */
psmouse->pktcnt = 1;
if (psmouse_handle_byte(psmouse))
goto out;
psmouse->packet[psmouse->pktcnt++] = data;
}
/*
* See if we need to force resync because mouse was idle for
* too long.
*/
if (psmouse->state == PSMOUSE_ACTIVATED &&
psmouse->pktcnt == 1 && psmouse->resync_time &&
time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
psmouse->badbyte = psmouse->packet[0];
__psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
goto out;
}
psmouse->last = jiffies;
psmouse_handle_byte(psmouse);
out:
return IRQ_HANDLED;
}
/*
* psmouse_reset() resets the mouse into power-on state.
*/
int psmouse_reset(struct psmouse *psmouse)
{
u8 param[2];
int error;
error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
if (error)
return error;
if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
return -EIO;
return 0;
}
/*
* Here we set the mouse resolution.
*/
void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
static const u8 params[] = { 0, 1, 2, 2, 3 };
u8 p;
if (resolution == 0 || resolution > 200)
resolution = 200;
p = params[resolution / 50];
ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
psmouse->resolution = 25 << p;
}
/*
* Here we set the mouse report rate.
*/
static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
{
static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
u8 r;
int i = 0;
while (rates[i] > rate)
i++;
r = rates[i];
ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
psmouse->rate = r;
}
/*
* Here we set the mouse scaling.
*/
static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
{
ps2_command(&psmouse->ps2dev, NULL,
scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
PSMOUSE_CMD_SETSCALE11);
}
/*
* psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
*/
static int psmouse_poll(struct psmouse *psmouse)
{
return ps2_command(&psmouse->ps2dev, psmouse->packet,
PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
}
static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
{
int i;
for (i = 0; ids[i]; i++)
if (!strcasecmp(id, ids[i]))
return true;
return false;
}
/*
* psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
*/
bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
{
struct serio *serio = psmouse->ps2dev.serio;
char *p, *fw_id_copy, *save_ptr;
bool found = false;
if (strncmp(serio->firmware_id, "PNP: ", 5))
return false;
fw_id_copy = kstrndup(&serio->firmware_id[5],
sizeof(serio->firmware_id) - 5,
GFP_KERNEL);
if (!fw_id_copy)
return false;
save_ptr = fw_id_copy;
while ((p = strsep(&fw_id_copy, " ")) != NULL) {
if (psmouse_check_pnp_id(p, ids)) {
found = true;
break;
}
}
kfree(save_ptr);
return found;
}
/*
* Genius NetMouse magic init.
*/
static int genius_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[4];
param[0] = 3;
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);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
psmouse->vendor = "Genius";
psmouse->name = "Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* IntelliMouse magic init.
*/
static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 100;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 3)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Wheel Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* Try IntelliMouse/Explorer magic init.
*/
static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
intellimouse_detect(psmouse, 0);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 4)
return -ENODEV;
/* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
param[0] = 200;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 80;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 40;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
__set_bit(REL_HWHEEL, psmouse->dev->relbit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Explorer Mouse";
psmouse->pktsize = 4;
}
return 0;
}
/*
* Kensington ThinkingMouse / ExpertMouse magic init.
*/
static int thinking_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
int i;
param[0] = 10;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
param[0] = 0;
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
for (i = 0; i < ARRAY_SIZE(seq); i++) {
param[0] = seq[i];
ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
}
ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (param[0] != 2)
return -ENODEV;
if (set_properties) {
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_EXTRA, psmouse->dev->keybit);
psmouse->vendor = "Kensington";
psmouse->name = "ThinkingMouse";
}
return 0;
}
/*
* Bare PS/2 protocol "detection". Always succeeds.
*/
static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
{
if (set_properties) {
if (!psmouse->vendor)
psmouse->vendor = "Generic";
if (!psmouse->name)
psmouse->name = "Mouse";
/*
* We have no way of figuring true number of buttons so let's
* assume that the device has 3.
*/
input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
}
return 0;
}
/*
* Cortron PS/2 protocol detection. There's no special way to detect it, so it
* must be forced by sysfs protocol writing.
*/
static int cortron_detect(struct psmouse *psmouse, bool set_properties)
{
if (set_properties) {
psmouse->vendor = "Cortron";
psmouse->name = "PS/2 Trackball";
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
__set_bit(BTN_SIDE, psmouse->dev->keybit);
}
return 0;
}
static const struct psmouse_protocol psmouse_protocols[] = {
{
.type = PSMOUSE_PS2,
.name = "PS/2",
.alias = "bare",
.maxproto = true,
.ignore_parity = true,
.detect = ps2bare_detect,
.try_passthru = true,
},
#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
{
.type = PSMOUSE_PS2PP,
.name = "PS2++",
.alias = "logitech",
.detect = ps2pp_detect,
},
#endif
{
.type = PSMOUSE_THINKPS,
.name = "ThinkPS/2",
.alias = "thinkps",
.detect = thinking_detect,
},
#ifdef CONFIG_MOUSE_PS2_CYPRESS
{
.type = PSMOUSE_CYPRESS,
.name = "CyPS/2",
.alias = "cypress",
.detect = cypress_detect,
.init = cypress_init,
},
#endif
{
.type = PSMOUSE_GENPS,
.name = "GenPS/2",
.alias = "genius",
.detect = genius_detect,
},
{
.type = PSMOUSE_IMPS,
.name = "ImPS/2",
.alias = "imps",
.maxproto = true,
.ignore_parity = true,
.detect = intellimouse_detect,
.try_passthru = true,
},
{
.type = PSMOUSE_IMEX,
.name = "ImExPS/2",
.alias = "exps",
.maxproto = true,
.ignore_parity = true,
.detect = im_explorer_detect,
.try_passthru = true,
},
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
{
.type = PSMOUSE_SYNAPTICS,
.name = "SynPS/2",
.alias = "synaptics",
.detect = synaptics_detect,
.init = synaptics_init_absolute,
},
{
.type = PSMOUSE_SYNAPTICS_RELATIVE,
.name = "SynRelPS/2",
.alias = "synaptics-relative",
.detect = synaptics_detect,
.init = synaptics_init_relative,
},
#endif
#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
{
.type = PSMOUSE_SYNAPTICS_SMBUS,
.name = "SynSMBus",
.alias = "synaptics-smbus",
.detect = synaptics_detect,
.init = synaptics_init_smbus,
.smbus_companion = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ALPS
{
.type = PSMOUSE_ALPS,
.name = "AlpsPS/2",
.alias = "alps",
.detect = alps_detect,
.init = alps_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
{
.type = PSMOUSE_LIFEBOOK,
.name = "LBPS/2",
.alias = "lifebook",
.detect = lifebook_detect,
.init = lifebook_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
{
.type = PSMOUSE_TRACKPOINT,
.name = "TPPS/2",
.alias = "trackpoint",
.detect = trackpoint_detect,
.try_passthru = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
{
.type = PSMOUSE_TOUCHKIT_PS2,
.name = "touchkitPS/2",
.alias = "touchkit",
.detect = touchkit_ps2_detect,
},
#endif
#ifdef CONFIG_MOUSE_PS2_OLPC
{
.type = PSMOUSE_HGPK,
.name = "OLPC HGPK",
.alias = "hgpk",
.detect = hgpk_detect,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ELANTECH
{
.type = PSMOUSE_ELANTECH,
.name = "ETPS/2",
.alias = "elantech",
.detect = elantech_detect,
.init = elantech_init_ps2,
},
#endif
#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
{
.type = PSMOUSE_ELANTECH_SMBUS,
.name = "ETSMBus",
.alias = "elantech-smbus",
.detect = elantech_detect,
.init = elantech_init_smbus,
.smbus_companion = true,
},
#endif
#ifdef CONFIG_MOUSE_PS2_SENTELIC
{
.type = PSMOUSE_FSP,
.name = "FSPPS/2",
.alias = "fsp",
.detect = fsp_detect,
.init = fsp_init,
},
#endif
{
.type = PSMOUSE_CORTRON,
.name = "CortronPS/2",
.alias = "cortps",
.detect = cortron_detect,
},
#ifdef CONFIG_MOUSE_PS2_FOCALTECH
{
.type = PSMOUSE_FOCALTECH,
.name = "FocalTechPS/2",
.alias = "focaltech",
.detect = focaltech_detect,
.init = focaltech_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_VMMOUSE
{
.type = PSMOUSE_VMMOUSE,
.name = VMMOUSE_PSNAME,
.alias = "vmmouse",
.detect = vmmouse_detect,
.init = vmmouse_init,
},
#endif
#ifdef CONFIG_MOUSE_PS2_BYD
{
.type = PSMOUSE_BYD,
.name = "BYDPS/2",
.alias = "byd",
.detect = byd_detect,
.init = byd_init,
},
#endif
{
.type = PSMOUSE_AUTO,
.name = "auto",
.alias = "any",
.maxproto = true,
},
};
static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
{
int i;
for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
if (psmouse_protocols[i].type == type)
return &psmouse_protocols[i];
return NULL;
}
static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
{
const struct psmouse_protocol *proto;
proto = __psmouse_protocol_by_type(type);
if (proto)
return proto;
WARN_ON(1);
return &psmouse_protocols[0];
}
static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
{
const struct psmouse_protocol *p;
int i;
for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
p = &psmouse_protocols[i];
if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
(strlen(p->alias) == len && !strncmp(p->alias, name, len)))
return &psmouse_protocols[i];
}
return NULL;
}
/*
* Apply default settings to the psmouse structure. Most of them will
* be overridden by individual protocol initialization routines.
*/
static void psmouse_apply_defaults(struct psmouse *psmouse)
{
struct input_dev *input_dev = psmouse->dev;
bitmap_zero(input_dev->evbit, EV_CNT);
bitmap_zero(input_dev->keybit, KEY_CNT);
bitmap_zero(input_dev->relbit, REL_CNT);
bitmap_zero(input_dev->absbit, ABS_CNT);
bitmap_zero(input_dev->mscbit, MSC_CNT);
input_set_capability(input_dev, EV_KEY, BTN_LEFT);
input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
input_set_capability(input_dev, EV_REL, REL_X);
input_set_capability(input_dev, EV_REL, REL_Y);
__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
psmouse->protocol = &psmouse_protocols[0];
psmouse->set_rate = psmouse_set_rate;
psmouse->set_resolution = psmouse_set_resolution;
psmouse->set_scale = psmouse_set_scale;
psmouse->poll = psmouse_poll;
psmouse->protocol_handler = psmouse_process_byte;
psmouse->pktsize = 3;
psmouse->reconnect = NULL;
psmouse->fast_reconnect = NULL;
psmouse->disconnect = NULL;
psmouse->cleanup = NULL;
psmouse->pt_activate = NULL;
psmouse->pt_deactivate = NULL;
}
static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
struct psmouse *psmouse, bool allow_passthrough,
bool set_properties)
{
if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
!allow_passthrough) {
return false;
}
if (set_properties)
psmouse_apply_defaults(psmouse);
return detect(psmouse, set_properties) == 0;
}
static bool psmouse_try_protocol(struct psmouse *psmouse,
enum psmouse_type type,
unsigned int *max_proto,
bool set_properties, bool init_allowed)
{
const struct psmouse_protocol *proto;
proto = __psmouse_protocol_by_type(type);
if (!proto)
return false;
if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
set_properties))
return false;
if (set_properties && proto->init && init_allowed) {
if (proto->init(psmouse) != 0) {
/*
* We detected device, but init failed. Adjust
* max_proto so we only try standard protocols.
*/
if (*max_proto > PSMOUSE_IMEX)
*max_proto = PSMOUSE_IMEX;
return false;
}
}
return true;
}
/*
* psmouse_extensions() probes for any extensions to the basic PS/2 protocol
* the mouse may have.
*/
static int psmouse_extensions(struct psmouse *psmouse,
unsigned int max_proto, bool set_properties)
{
bool synaptics_hardware = false;
int ret;
/*
* Always check for focaltech, this is safe as it uses pnp-id
* matching.
*/
if (psmouse_do_detect(focaltech_detect,
psmouse, false, set_properties)) {
if (max_proto > PSMOUSE_IMEX &&
IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
(!set_properties || focaltech_init(psmouse) == 0)) {
return PSMOUSE_FOCALTECH;
}
/*
* Restrict psmouse_max_proto so that psmouse_initialize()
* does not try to reset rate and resolution, because even
* that upsets the device.
* This also causes us to basically fall through to basic
* protocol detection, where we fully reset the mouse,
* and set it up as bare PS/2 protocol device.
*/
psmouse_max_proto = max_proto = PSMOUSE_PS2;
}
/*
* We always check for LifeBook because it does not disturb mouse
* (it only checks DMI information).
*/
if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
set_properties, max_proto > PSMOUSE_IMEX))
return PSMOUSE_LIFEBOOK;
if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
set_properties, max_proto > PSMOUSE_IMEX))
return PSMOUSE_VMMOUSE;
/*
* Try Kensington ThinkingMouse (we try first, because Synaptics
* probe upsets the ThinkingMouse).
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
set_properties, true)) {
return PSMOUSE_THINKPS;
}
/*
* Try Synaptics TouchPad. Note that probing is done even if
* Synaptics protocol support is disabled in config - we need to
* know if it is Synaptics so we can reset it properly after
* probing for IntelliMouse.
*/
if (max_proto > PSMOUSE_PS2 &&
psmouse_do_detect(synaptics_detect,
psmouse, false, set_properties)) {
synaptics_hardware = true;
if (max_proto > PSMOUSE_IMEX) {
/*
* Try activating protocol, but check if support is
* enabled first, since we try detecting Synaptics
* even when protocol is disabled.
*/
if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
if (!set_properties)
return PSMOUSE_SYNAPTICS;
ret = synaptics_init(psmouse);
if (ret >= 0)
return ret;
}
/*
* Some Synaptics touchpads can emulate extended
* protocols (like IMPS/2). Unfortunately
* Logitech/Genius probes confuse some firmware
* versions so we'll have to skip them.
*/
max_proto = PSMOUSE_IMEX;
}
/*
* Make sure that touchpad is in relative mode, gestures
* (taps) are enabled.
*/
synaptics_reset(psmouse);
}
/*
* Try Cypress Trackpad. We must try it before Finger Sensing Pad
* because Finger Sensing Pad probe upsets some modules of Cypress
* Trackpads.
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
set_properties, true)) {
return PSMOUSE_CYPRESS;
}
/* Try ALPS TouchPad */
if (max_proto > PSMOUSE_IMEX) {
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
&max_proto, set_properties, true))
return PSMOUSE_ALPS;
}
/* Try OLPC HGPK touchpad */
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
set_properties, true)) {
return PSMOUSE_HGPK;
}
/* Try Elantech touchpad */
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
&max_proto, set_properties, false)) {
if (!set_properties)
return PSMOUSE_ELANTECH;
ret = elantech_init(psmouse);
if (ret >= 0)
return ret;
}
if (max_proto > PSMOUSE_IMEX) {
if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
&max_proto, set_properties, true))
return PSMOUSE_GENPS;
if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
&max_proto, set_properties, true))
return PSMOUSE_PS2PP;
if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
&max_proto, set_properties, true))
return PSMOUSE_TRACKPOINT;
if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
&max_proto, set_properties, true))
return PSMOUSE_TOUCHKIT_PS2;
}
/*
* Try Finger Sensing Pad. We do it here because its probe upsets
* Trackpoint devices (causing TP_READ_ID command to time out).
*/
if (max_proto > PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_FSP,
&max_proto, set_properties, true)) {
return PSMOUSE_FSP;
}
/*
* Reset to defaults in case the device got confused by extended
* protocol probes. Note that we follow up with full reset because
* some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
psmouse_reset(psmouse);
if (max_proto >= PSMOUSE_IMEX &&
psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
&max_proto, set_properties, true)) {
return PSMOUSE_IMEX;
}
if (max_proto >= PSMOUSE_IMPS &&
psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
&max_proto, set_properties, true)) {
return PSMOUSE_IMPS;
}
/*
* Okay, all failed, we have a standard mouse here. The number of
* the buttons is still a question, though. We assume 3.
*/
psmouse_try_protocol(psmouse, PSMOUSE_PS2,
&max_proto, set_properties, true);
if (synaptics_hardware) {
/*
* We detected Synaptics hardware but it did not respond to
* IMPS/2 probes. We need to reset the touchpad because if
* there is a track point on the pass through port it could
* get disabled while probing for protocol extensions.
*/
psmouse_reset(psmouse);
}
return PSMOUSE_PS2;
}
/*
* psmouse_probe() probes for a PS/2 mouse.
*/
static int psmouse_probe(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
u8 param[2];
int error;
/*
* First, we check if it's a mouse. It should send 0x00 or 0x03 in
* case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
* Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
* subsequent ID queries, probably due to a firmware bug.
*/
param[0] = 0xa5;
error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
if (error)
return error;
if (param[0] != 0x00 && param[0] != 0x03 &&
param[0] != 0x04 && param[0] != 0xff)
return -ENODEV;
/*
* Then we reset and disable the mouse so that it doesn't generate
* events.
*/
error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
if (error)
psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
ps2dev->serio->phys, error);
return 0;
}
/*
* psmouse_initialize() initializes the mouse to a sane state.
*/
static void psmouse_initialize(struct psmouse *psmouse)
{
/*
* We set the mouse report rate, resolution and scaling.
*/
if (psmouse_max_proto != PSMOUSE_PS2) {
psmouse->set_rate(psmouse, psmouse->rate);
psmouse->set_resolution(psmouse, psmouse->resolution);
psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
}
}
/*
* psmouse_activate() enables the mouse so that we get motion reports from it.
*/
int psmouse_activate(struct psmouse *psmouse)
{
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
psmouse->ps2dev.serio->phys);
return -1;
}
psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
return 0;
}
/*
* psmouse_deactivate() puts the mouse into poll mode so that we don't get
* motion reports from it unless we explicitly request it.
*/
int psmouse_deactivate(struct psmouse *psmouse)
{
int error;
error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
if (error) {
psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
psmouse->ps2dev.serio->phys, error);
return error;
}
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
return 0;
}
/*
* psmouse_resync() attempts to re-validate current protocol.
*/
static void psmouse_resync(struct work_struct *work)
{
struct psmouse *parent = NULL, *psmouse =
container_of(work, struct psmouse, resync_work.work);
struct serio *serio = psmouse->ps2dev.serio;
psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
bool failed = false, enabled = false;
int i;
mutex_lock(&psmouse_mutex);
if (psmouse->state != PSMOUSE_RESYNCING)
goto out;
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
/*
* Some mice don't ACK commands sent while they are in the middle of
* transmitting motion packet. To avoid delay we use ps2_sendbyte()
* instead of ps2_command() which would wait for 200ms for an ACK
* that may never come.
* As an additional quirk ALPS touchpads may not only forget to ACK
* disable command but will stop reporting taps, so if we see that
* mouse at least once ACKs disable we will do full reconnect if ACK
* is missing.
*/
psmouse->num_resyncs++;
if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
failed = true;
} else
psmouse->acks_disable_command = true;
/*
* Poll the mouse. If it was reset the packet will be shorter than
* psmouse->pktsize and ps2_command will fail. We do not expect and
* do not handle scenario when mouse "upgrades" its protocol while
* disconnected since it would require additional delay. If we ever
* see a mouse that does it we'll adjust the code.
*/
if (!failed) {
if (psmouse->poll(psmouse))
failed = true;
else {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
for (i = 0; i < psmouse->pktsize; i++) {
psmouse->pktcnt++;
rc = psmouse->protocol_handler(psmouse);
if (rc != PSMOUSE_GOOD_DATA)
break;
}
if (rc != PSMOUSE_FULL_PACKET)
failed = true;
psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
}
}
/*
* Now try to enable mouse. We try to do that even if poll failed
* and also repeat our attempts 5 times, otherwise we may be left
* out with disabled mouse.
*/
for (i = 0; i < 5; i++) {
if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
enabled = true;
break;
}
msleep(200);
}
if (!enabled) {
psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
psmouse->ps2dev.serio->phys);
failed = true;
}
if (failed) {
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse_info(psmouse,
"resync failed, issuing reconnect request\n");
serio_reconnect(serio);
} else
psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
if (parent)
psmouse_activate(parent);
out:
mutex_unlock(&psmouse_mutex);
}
/*
* psmouse_cleanup() resets the mouse into power-on state.
*/
static void psmouse_cleanup(struct serio *serio)
{
struct psmouse *psmouse = serio_get_drvdata(serio);
struct psmouse *parent = NULL;
mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
/*
* Disable stream mode so cleanup routine can proceed undisturbed.
*/
if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
psmouse->ps2dev.serio->phys);
if (psmouse->cleanup)
psmouse->cleanup(psmouse);
/*
* Reset the mouse to defaults (bare PS/2 protocol).
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
/*
* Some boxes, such as HP nx7400, get terribly confused if mouse
* is not fully enabled before suspending/shutting down.
*/
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
if (parent) {
if (parent->pt_deactivate)
parent->pt_deactivate(parent);
psmouse_activate(parent);
}
mutex_unlock(&psmouse_mutex);
}
/*
* psmouse_disconnect() closes and frees.
*/
static void psmouse_disconnect(struct serio *serio)
{
struct psmouse *psmouse = serio_get_drvdata(serio);
struct psmouse *parent = NULL;
sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
mutex_lock(&psmouse_mutex);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
/* make sure we don't have a resync in progress */
mutex_unlock(&psmouse_mutex);
flush_workqueue(kpsmoused_wq);
mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
if (parent && parent->pt_deactivate)
parent->pt_deactivate(parent);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
serio_close(serio);
serio_set_drvdata(serio, NULL);
if (psmouse->dev)
input_unregister_device(psmouse->dev);
kfree(psmouse);
if (parent)
psmouse_activate(parent);
mutex_unlock(&psmouse_mutex);
}
static int psmouse_switch_protocol(struct psmouse *psmouse,
const struct psmouse_protocol *proto)
{
const struct psmouse_protocol *selected_proto;
struct input_dev *input_dev = psmouse->dev;
enum psmouse_type type;
input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
if (proto && (proto->detect || proto->init)) {
psmouse_apply_defaults(psmouse);
if (proto->detect && proto->detect(psmouse, true) < 0)
return -1;
if (proto->init && proto->init(psmouse) < 0)
return -1;
selected_proto = proto;
} else {
type = psmouse_extensions(psmouse, psmouse_max_proto, true);
selected_proto = psmouse_protocol_by_type(type);
}
psmouse->protocol = selected_proto;
/*
* If mouse's packet size is 3 there is no point in polling the
* device in hopes to detect protocol reset - we won't get less
* than 3 bytes response anyhow.
*/
if (psmouse->pktsize == 3)
psmouse->resync_time = 0;
/*
* Some smart KVMs fake response to POLL command returning just
* 3 bytes and messing up our resync logic, so if initial poll
* fails we won't try polling the device anymore. Hopefully
* such KVM will maintain initially selected protocol.
*/
if (psmouse->resync_time && psmouse->poll(psmouse))
psmouse->resync_time = 0;
snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
selected_proto->name, psmouse->vendor, psmouse->name);
input_dev->name = psmouse->devname;
input_dev->phys = psmouse->phys;
input_dev->id.bustype = BUS_I8042;
input_dev->id.vendor = 0x0002;
input_dev->id.product = psmouse->protocol->type;
input_dev->id.version = psmouse->model;
return 0;
}
/*
* psmouse_connect() is a callback from the serio module when
* an unhandled serio port is found.
*/
static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
{
struct psmouse *psmouse, *parent = NULL;
struct input_dev *input_dev;
int retval = 0, error = -ENOMEM;
mutex_lock(&psmouse_mutex);
/*
* If this is a pass-through port deactivate parent so the device
* connected to this port can be successfully identified
*/
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
input_dev = input_allocate_device();
if (!psmouse || !input_dev)
goto err_free;
ps2_init(&psmouse->ps2dev, serio);
INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
psmouse->dev = input_dev;
snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
serio_set_drvdata(serio, psmouse);
error = serio_open(serio, drv);
if (error)
goto err_clear_drvdata;
/* give PT device some time to settle down before probing */
if (serio->id.type == SERIO_PS_PSTHRU)
usleep_range(10000, 15000);
if (psmouse_probe(psmouse) < 0) {
error = -ENODEV;
goto err_close_serio;
}
psmouse->rate = psmouse_rate;
psmouse->resolution = psmouse_resolution;
psmouse->resetafter = psmouse_resetafter;
psmouse->resync_time = parent ? 0 : psmouse_resync_time;
psmouse->smartscroll = psmouse_smartscroll;
psmouse_switch_protocol(psmouse, NULL);
if (!psmouse->protocol->smbus_companion) {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
psmouse_initialize(psmouse);
error = input_register_device(input_dev);
if (error)
goto err_protocol_disconnect;
} else {
/* Smbus companion will be reporting events, not us. */
input_free_device(input_dev);
psmouse->dev = input_dev = NULL;
}
if (parent && parent->pt_activate)
parent->pt_activate(parent);
error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
if (error)
goto err_pt_deactivate;
/*
* PS/2 devices having SMBus companions should stay disabled
* on PS/2 side, in order to have SMBus part operable.
*/
if (!psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
out:
/* If this is a pass-through port the parent needs to be re-activated */
if (parent)
psmouse_activate(parent);
mutex_unlock(&psmouse_mutex);
return retval;
err_pt_deactivate:
if (parent && parent->pt_deactivate)
parent->pt_deactivate(parent);
if (input_dev) {
input_unregister_device(input_dev);
input_dev = NULL; /* so we don't try to free it below */
}
err_protocol_disconnect:
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
err_close_serio:
serio_close(serio);
err_clear_drvdata:
serio_set_drvdata(serio, NULL);
err_free:
input_free_device(input_dev);
kfree(psmouse);
retval = error;
goto out;
}
static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
{
struct psmouse *psmouse = serio_get_drvdata(serio);
struct psmouse *parent = NULL;
int (*reconnect_handler)(struct psmouse *);
enum psmouse_type type;
int rc = -1;
mutex_lock(&psmouse_mutex);
if (fast_reconnect) {
reconnect_handler = psmouse->fast_reconnect;
if (!reconnect_handler) {
rc = -ENOENT;
goto out_unlock;
}
} else {
reconnect_handler = psmouse->reconnect;
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
if (reconnect_handler) {
if (reconnect_handler(psmouse))
goto out;
} else {
psmouse_reset(psmouse);
if (psmouse_probe(psmouse) < 0)
goto out;
type = psmouse_extensions(psmouse, psmouse_max_proto, false);
if (psmouse->protocol->type != type)
goto out;
}
/*
* OK, the device type (and capabilities) match the old one,
* we can continue using it, complete initialization
*/
if (!psmouse->protocol->smbus_companion) {
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
psmouse_initialize(psmouse);
}
if (parent && parent->pt_activate)
parent->pt_activate(parent);
/*
* PS/2 devices having SMBus companions should stay disabled
* on PS/2 side, in order to have SMBus part operable.
*/
if (!psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
rc = 0;
out:
/* If this is a pass-through port the parent waits to be activated */
if (parent)
psmouse_activate(parent);
out_unlock:
mutex_unlock(&psmouse_mutex);
return rc;
}
static int psmouse_reconnect(struct serio *serio)
{
return __psmouse_reconnect(serio, false);
}
static int psmouse_fast_reconnect(struct serio *serio)
{
return __psmouse_reconnect(serio, true);
}
static struct serio_device_id psmouse_serio_ids[] = {
{
.type = SERIO_8042,
.proto = SERIO_ANY,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{
.type = SERIO_PS_PSTHRU,
.proto = SERIO_ANY,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
static struct serio_driver psmouse_drv = {
.driver = {
.name = "psmouse",
},
.description = DRIVER_DESC,
.id_table = psmouse_serio_ids,
.interrupt = psmouse_interrupt,
.connect = psmouse_connect,
.reconnect = psmouse_reconnect,
.fast_reconnect = psmouse_fast_reconnect,
.disconnect = psmouse_disconnect,
.cleanup = psmouse_cleanup,
};
ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct serio *serio = to_serio_port(dev);
struct psmouse_attribute *attr = to_psmouse_attr(devattr);
struct psmouse *psmouse = serio_get_drvdata(serio);
if (psmouse->protocol->smbus_companion &&
devattr != &psmouse_attr_protocol.dattr)
return -ENOENT;
return attr->show(psmouse, attr->data, buf);
}
ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct serio *serio = to_serio_port(dev);
struct psmouse_attribute *attr = to_psmouse_attr(devattr);
struct psmouse *psmouse, *parent = NULL;
int retval;
retval = mutex_lock_interruptible(&psmouse_mutex);
if (retval)
goto out;
psmouse = serio_get_drvdata(serio);
if (psmouse->protocol->smbus_companion &&
devattr != &psmouse_attr_protocol.dattr) {
retval = -ENOENT;
goto out_unlock;
}
if (attr->protect) {
if (psmouse->state == PSMOUSE_IGNORE) {
retval = -ENODEV;
goto out_unlock;
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
psmouse_deactivate(parent);
}
if (!psmouse->protocol->smbus_companion)
psmouse_deactivate(psmouse);
}
retval = attr->set(psmouse, attr->data, buf, count);
if (attr->protect) {
if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
psmouse_activate(psmouse);
if (parent)
psmouse_activate(parent);
}
out_unlock:
mutex_unlock(&psmouse_mutex);
out:
return retval;
}
static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
{
unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
return sprintf(buf, "%u\n", *field);
}
static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
{
unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
unsigned int value;
int err;
err = kstrtouint(buf, 10, &value);
if (err)
return err;
*field = value;
return count;
}
static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
{
return sprintf(buf, "%s\n", psmouse->protocol->name);
}
static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
{
struct serio *serio = psmouse->ps2dev.serio;
struct psmouse *parent = NULL;
struct input_dev *old_dev, *new_dev;
const struct psmouse_protocol *proto, *old_proto;
int error;
int retry = 0;
proto = psmouse_protocol_by_name(buf, count);
if (!proto)
return -EINVAL;
if (psmouse->protocol == proto)
return count;
new_dev = input_allocate_device();
if (!new_dev)
return -ENOMEM;
while (!list_empty(&serio->children)) {
if (++retry > 3) {
psmouse_warn(psmouse,
"failed to destroy children ports, protocol change aborted.\n");
input_free_device(new_dev);
return -EIO;
}
mutex_unlock(&psmouse_mutex);
serio_unregister_child_port(serio);
mutex_lock(&psmouse_mutex);
if (serio->drv != &psmouse_drv) {
input_free_device(new_dev);
return -ENODEV;
}
if (psmouse->protocol == proto) {
input_free_device(new_dev);
return count; /* switched by other thread */
}
}
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
parent = serio_get_drvdata(serio->parent);
if (parent->pt_deactivate)
parent->pt_deactivate(parent);
}
old_dev = psmouse->dev;
old_proto = psmouse->protocol;
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
psmouse->dev = new_dev;
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
if (psmouse_switch_protocol(psmouse, proto) < 0) {
psmouse_reset(psmouse);
/* default to PSMOUSE_PS2 */
psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
}
psmouse_initialize(psmouse);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
if (psmouse->protocol->smbus_companion) {
input_free_device(psmouse->dev);
psmouse->dev = NULL;
} else {
error = input_register_device(psmouse->dev);
if (error) {
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
psmouse_set_state(psmouse, PSMOUSE_IGNORE);
input_free_device(new_dev);
psmouse->dev = old_dev;
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
psmouse_switch_protocol(psmouse, old_proto);
psmouse_initialize(psmouse);
psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
return error;
}
}
if (old_dev)
input_unregister_device(old_dev);
if (parent && parent->pt_activate)
parent->pt_activate(parent);
return count;
}
static ssize_t psmouse_attr_set_rate(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;
psmouse->set_rate(psmouse, value);
return count;
}
static ssize_t psmouse_attr_set_resolution(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;
psmouse->set_resolution(psmouse, value);
return count;
}
static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
{
const struct psmouse_protocol *proto;
if (!val)
return -EINVAL;
proto = psmouse_protocol_by_name(val, strlen(val));
if (!proto || !proto->maxproto)
return -EINVAL;
*((unsigned int *)kp->arg) = proto->type;
return 0;
}
static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
{
int type = *((unsigned int *)kp->arg);
return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
}
static int __init psmouse_init(void)
{
int err;
lifebook_module_init();
synaptics_module_init();
hgpk_module_init();
err = psmouse_smbus_module_init();
if (err)
return err;
kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
if (!kpsmoused_wq) {
pr_err("failed to create kpsmoused workqueue\n");
err = -ENOMEM;
goto err_smbus_exit;
}
err = serio_register_driver(&psmouse_drv);
if (err)
goto err_destroy_wq;
return 0;
err_destroy_wq:
destroy_workqueue(kpsmoused_wq);
err_smbus_exit:
psmouse_smbus_module_exit();
return err;
}
static void __exit psmouse_exit(void)
{
serio_unregister_driver(&psmouse_drv);
destroy_workqueue(kpsmoused_wq);
psmouse_smbus_module_exit();
}
module_init(psmouse_init);
module_exit(psmouse_exit);
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