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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0-only/* * PS/2 mouse driver * * Copyright (c) 1999-2002 Vojtech Pavlik * Copyright (c) 2003-2004 Dmitry Torokhov */
#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 "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_dev_attrs[] = { &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};
ATTRIBUTE_GROUPS(psmouse_dev);
/* * 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);
struct psmouse *psmouse_from_serio(struct serio *serio){ struct ps2dev *ps2dev = serio_get_drvdata(serio);
return container_of(ps2dev, struct psmouse, ps2dev);}
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;}
/* * __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; }}
static enum ps2_disposition psmouse_pre_receive_byte(struct ps2dev *ps2dev, u8 data, unsigned int flags){ struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
if (psmouse->state == PSMOUSE_IGNORE) return PS2_IGNORE;
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" : ""); return PS2_ERROR; }
if (flags & SERIO_OOB_DATA) { psmouse_handle_oob_data(psmouse, data); return PS2_IGNORE; }
return PS2_PROCESS;}
static void psmouse_receive_byte(struct ps2dev *ps2dev, u8 data){ struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev);
pm_wakeup_event(&ps2dev->serio->dev, 0);
if (psmouse->state <= PSMOUSE_RESYNCING) return;
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); schedule_work(&psmouse->resync_work); return; }
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; return; }
if (psmouse->packet[1] == PSMOUSE_RET_ID) { __psmouse_set_state(psmouse, PSMOUSE_IGNORE); serio_reconnect(ps2dev->serio); return; }
/* Not a new device, try processing first byte normally */ psmouse->pktcnt = 1; if (psmouse_handle_byte(psmouse)) return;
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); schedule_work(&psmouse->resync_work); return; }
psmouse->last = jiffies; psmouse_handle_byte(psmouse);}
/* * 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_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 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); 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 = psmouse_from_serio(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 = psmouse_from_serio(serio); struct psmouse *parent = NULL;
mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { parent = psmouse_from_serio(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 = psmouse_from_serio(serio); struct psmouse *parent = NULL;
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); disable_work_sync(&psmouse->resync_work); mutex_lock(&psmouse_mutex);
if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { parent = psmouse_from_serio(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 = psmouse_from_serio(serio->parent); psmouse_deactivate(parent); }
psmouse = kzalloc_obj(*psmouse); input_dev = input_allocate_device(); if (!psmouse || !input_dev) goto err_free;
ps2_init(&psmouse->ps2dev, serio, psmouse_pre_receive_byte, psmouse_receive_byte); INIT_WORK(&psmouse->resync_work, psmouse_resync); psmouse->dev = input_dev; scnprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
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);
/* * 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_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 = psmouse_from_serio(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 = psmouse_from_serio(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", .dev_groups = psmouse_dev_groups, }, .description = DRIVER_DESC, .id_table = psmouse_serio_ids, .interrupt = ps2_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 = psmouse_from_serio(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 = psmouse_from_serio(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 = psmouse_from_serio(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 = psmouse_from_serio(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\n", psmouse_protocol_by_type(type)->name);}
static int __init psmouse_init(void){ int err;
lifebook_module_init(); synaptics_module_init();
err = psmouse_smbus_module_init(); if (err) return err;
err = serio_register_driver(&psmouse_drv); if (err) goto err_smbus_exit;
return 0;
err_smbus_exit: psmouse_smbus_module_exit(); return err;}
static void __exit psmouse_exit(void){ serio_unregister_driver(&psmouse_drv); psmouse_smbus_module_exit();}
module_init(psmouse_init);module_exit(psmouse_exit);