/* * 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. */ #include #include #include #include #include #include #include #include #include #include "psmouse.h" #include "synaptics.h" #include "logips2pp.h" #include "alps.h" #include "lifebook.h" #include "trackpoint.h" #define DRIVER_DESC "PS/2 mouse driver" MODULE_AUTHOR("Vojtech Pavlik "); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); static unsigned int psmouse_max_proto = PSMOUSE_AUTO; static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) #define param_set_proto_abbrev psmouse_set_maxproto #define param_get_proto_abbrev psmouse_get_maxproto 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 unsigned int psmouse_smartscroll = 1; module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); static unsigned int psmouse_resetafter; module_param_named(resetafter, psmouse_resetafter, uint, 0644); MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); PSMOUSE_DEFINE_ATTR(protocol); PSMOUSE_DEFINE_ATTR(rate); PSMOUSE_DEFINE_ATTR(resolution); PSMOUSE_DEFINE_ATTR(resetafter); __obsolete_setup("psmouse_noext"); __obsolete_setup("psmouse_resolution="); __obsolete_setup("psmouse_smartscroll="); __obsolete_setup("psmouse_resetafter="); __obsolete_setup("psmouse_rate="); /* * psmouse_sem 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 DECLARE_MUTEX(psmouse_sem); struct psmouse_protocol { enum psmouse_type type; char *name; char *alias; int maxproto; int (*detect)(struct psmouse *, int); int (*init)(struct psmouse *); }; /* * psmouse_process_byte() analyzes the PS/2 data stream and reports * relevant events to the input module once full packet has arrived. */ static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs) { struct input_dev *dev = &psmouse->dev; unsigned char *packet = psmouse->packet; if (psmouse->pktcnt < psmouse->pktsize) return PSMOUSE_GOOD_DATA; /* * Full packet accumulated, process it */ input_regs(dev, regs); /* * Scroll wheel on IntelliMice, scroll buttons on NetMice */ if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); /* * Scroll wheel and buttons on IntelliMouse Explorer */ if (psmouse->type == PSMOUSE_IMEX) { input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); } /* * Extra buttons on Genius NewNet 3D */ if (psmouse->type == PSMOUSE_GENPS) { input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); } /* * Extra button on ThinkingMouse */ if (psmouse->type == PSMOUSE_THINKPS) { input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); /* Without this bit of weirdness moving up gives wildly high Y changes. */ packet[1] |= (packet[0] & 0x40) << 1; } /* * Generic PS/2 Mouse */ input_report_key(dev, BTN_LEFT, packet[0] & 1); input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); input_sync(dev); return PSMOUSE_FULL_PACKET; } /* * psmouse_interrupt() handles incoming characters, either gathering them into * packets or passing them to the command routine as command output. */ static irqreturn_t psmouse_interrupt(struct serio *serio, unsigned char data, unsigned int flags, struct pt_regs *regs) { struct psmouse *psmouse = serio_get_drvdata(serio); psmouse_ret_t rc; if (psmouse->state == PSMOUSE_IGNORE) goto out; if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { if (psmouse->state == PSMOUSE_ACTIVATED) printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", flags & SERIO_TIMEOUT ? " timeout" : "", flags & SERIO_PARITY ? " bad parity" : ""); ps2_cmd_aborted(&psmouse->ps2dev); 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; if (psmouse->state == PSMOUSE_INITIALIZING) goto out; if (psmouse->state == PSMOUSE_ACTIVATED && psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", psmouse->name, psmouse->phys, psmouse->pktcnt); psmouse->pktcnt = 0; } psmouse->last = jiffies; psmouse->packet[psmouse->pktcnt++] = data; if (psmouse->packet[0] == PSMOUSE_RET_BAT) { if (psmouse->pktcnt == 1) goto out; if (psmouse->pktcnt == 2) { if (psmouse->packet[1] == PSMOUSE_RET_ID) { psmouse->state = PSMOUSE_IGNORE; serio_reconnect(serio); goto out; } if (psmouse->type == PSMOUSE_SYNAPTICS) { /* neither 0xAA nor 0x00 are valid first bytes * for a packet in absolute mode */ psmouse->pktcnt = 0; goto out; } } } rc = psmouse->protocol_handler(psmouse, regs); switch (rc) { case PSMOUSE_BAD_DATA: printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", psmouse->name, psmouse->phys, psmouse->pktcnt); psmouse->pktcnt = 0; if (++psmouse->out_of_sync == psmouse->resetafter) { psmouse->state = PSMOUSE_IGNORE; printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); serio_reconnect(psmouse->ps2dev.serio); } break; case PSMOUSE_FULL_PACKET: psmouse->pktcnt = 0; if (psmouse->out_of_sync) { psmouse->out_of_sync = 0; printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", psmouse->name, psmouse->phys); } break; case PSMOUSE_GOOD_DATA: break; } out: return IRQ_HANDLED; } /* * psmouse_sliced_command() sends an extended PS/2 command to the mouse * using sliced syntax, understood by advanced devices, such as Logitech * or Synaptics touchpads. The command is encoded as: * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu * is the command. */ int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) { int i; if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) return -1; for (i = 6; i >= 0; i -= 2) { unsigned char d = (command >> i) & 3; if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) return -1; } return 0; } /* * psmouse_reset() resets the mouse into power-on state. */ int psmouse_reset(struct psmouse *psmouse) { unsigned char param[2]; if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) return -1; if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) return -1; return 0; } /* * Genius NetMouse magic init. */ static int genius_detect(struct psmouse *psmouse, int set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char 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 -1; if (set_properties) { 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 = "Wheel Mouse"; psmouse->pktsize = 4; } return 0; } /* * IntelliMouse magic init. */ static int intellimouse_detect(struct psmouse *psmouse, int set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char 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 -1; 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, int set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char 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 -1; if (set_properties) { set_bit(BTN_MIDDLE, psmouse->dev.keybit); set_bit(REL_WHEEL, 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, int set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char param[2]; unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 }; 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; seq[i]; i++) ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE); ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); if (param[0] != 2) return -1; if (set_properties) { 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, int set_properties) { if (set_properties) { if (!psmouse->vendor) psmouse->vendor = "Generic"; if (!psmouse->name) psmouse->name = "Mouse"; } return 0; } /* * 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, int set_properties) { int synaptics_hardware = 0; /* * We always check for lifebook because it does not disturb mouse * (it only checks DMI information). */ if (lifebook_detect(psmouse, set_properties) == 0) { if (max_proto > PSMOUSE_IMEX) { if (!set_properties || lifebook_init(psmouse) == 0) return PSMOUSE_LIFEBOOK; } } /* * Try Kensington ThinkingMouse (we try first, because synaptics probe * upsets the thinkingmouse). */ if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) return PSMOUSE_THINKPS; /* * Try Synaptics TouchPad */ if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { synaptics_hardware = 1; if (max_proto > PSMOUSE_IMEX) { if (!set_properties || synaptics_init(psmouse) == 0) return PSMOUSE_SYNAPTICS; /* * 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 ALPS TouchPad */ if (max_proto > PSMOUSE_IMEX) { ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); if (alps_detect(psmouse, set_properties) == 0) { if (!set_properties || alps_init(psmouse) == 0) return PSMOUSE_ALPS; /* * Init failed, try basic relative protocols */ max_proto = PSMOUSE_IMEX; } } if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0) return PSMOUSE_GENPS; if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0) return PSMOUSE_PS2PP; /* * Reset to defaults in case the device got confused by extended * protocol probes. */ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) return PSMOUSE_IMEX; if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) return PSMOUSE_IMPS; /* * Try to initialize the IBM TrackPoint */ if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0) return PSMOUSE_TRACKPOINT; /* * Okay, all failed, we have a standard mouse here. The number of the buttons * is still a question, though. We assume 3. */ ps2bare_detect(psmouse, set_properties); 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); ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); } return PSMOUSE_PS2; } static struct psmouse_protocol psmouse_protocols[] = { { .type = PSMOUSE_PS2, .name = "PS/2", .alias = "bare", .maxproto = 1, .detect = ps2bare_detect, }, { .type = PSMOUSE_PS2PP, .name = "PS2++", .alias = "logitech", .detect = ps2pp_init, }, { .type = PSMOUSE_THINKPS, .name = "ThinkPS/2", .alias = "thinkps", .detect = thinking_detect, }, { .type = PSMOUSE_GENPS, .name = "GenPS/2", .alias = "genius", .detect = genius_detect, }, { .type = PSMOUSE_IMPS, .name = "ImPS/2", .alias = "imps", .maxproto = 1, .detect = intellimouse_detect, }, { .type = PSMOUSE_IMEX, .name = "ImExPS/2", .alias = "exps", .maxproto = 1, .detect = im_explorer_detect, }, { .type = PSMOUSE_SYNAPTICS, .name = "SynPS/2", .alias = "synaptics", .detect = synaptics_detect, .init = synaptics_init, }, { .type = PSMOUSE_ALPS, .name = "AlpsPS/2", .alias = "alps", .detect = alps_detect, .init = alps_init, }, { .type = PSMOUSE_LIFEBOOK, .name = "LBPS/2", .alias = "lifebook", .init = lifebook_init, }, { .type = PSMOUSE_TRACKPOINT, .name = "TPPS/2", .alias = "trackpoint", .detect = trackpoint_detect, }, { .type = PSMOUSE_AUTO, .name = "auto", .alias = "any", .maxproto = 1, }, }; static 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]; WARN_ON(1); return &psmouse_protocols[0]; } static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) { 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; } /* * psmouse_probe() probes for a PS/2 mouse. */ static int psmouse_probe(struct psmouse *psmouse) { struct ps2dev *ps2dev = &psmouse->ps2dev; unsigned char param[2]; /* * 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; if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) return -1; if (param[0] != 0x00 && param[0] != 0x03 && param[0] != 0x04 && param[0] != 0xff) return -1; /* * Then we reset and disable the mouse so that it doesn't generate events. */ if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); return 0; } /* * Here we set the mouse resolution. */ void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) { unsigned char params[] = { 0, 1, 2, 2, 3 }; if (resolution == 0 || resolution > 200) resolution = 200; ps2_command(&psmouse->ps2dev, ¶ms[resolution / 50], PSMOUSE_CMD_SETRES); psmouse->resolution = 25 << params[resolution / 50]; } /* * Here we set the mouse report rate. */ static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) { unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; int i = 0; while (rates[i] > rate) i++; ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE); psmouse->rate = rates[i]; } /* * psmouse_initialize() initializes the mouse to a sane state. */ static void psmouse_initialize(struct psmouse *psmouse) { /* * We set the mouse into streaming mode. */ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM); /* * 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); ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); } } /* * 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. */ static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) { serio_pause_rx(psmouse->ps2dev.serio); psmouse->state = new_state; psmouse->pktcnt = psmouse->out_of_sync = 0; psmouse->ps2dev.flags = 0; serio_continue_rx(psmouse->ps2dev.serio); } /* * psmouse_activate() enables the mouse so that we get motion reports from it. */ static void psmouse_activate(struct psmouse *psmouse) { if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", psmouse->ps2dev.serio->phys); psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); } /* * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion * reports from it unless we explicitely request it. */ static void psmouse_deactivate(struct psmouse *psmouse) { if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", psmouse->ps2dev.serio->phys); psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); } /* * psmouse_cleanup() resets the mouse into power-on state. */ static void psmouse_cleanup(struct serio *serio) { struct psmouse *psmouse = serio_get_drvdata(serio); psmouse_reset(psmouse); } /* * psmouse_disconnect() closes and frees. */ static void psmouse_disconnect(struct serio *serio) { struct psmouse *psmouse, *parent = NULL; psmouse = serio_get_drvdata(serio); device_remove_file(&serio->dev, &psmouse_attr_protocol); device_remove_file(&serio->dev, &psmouse_attr_rate); device_remove_file(&serio->dev, &psmouse_attr_resolution); device_remove_file(&serio->dev, &psmouse_attr_resetafter); down(&psmouse_sem); psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 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); input_unregister_device(&psmouse->dev); serio_close(serio); serio_set_drvdata(serio, NULL); kfree(psmouse); if (parent) psmouse_activate(parent); up(&psmouse_sem); } static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto) { memset(&psmouse->dev, 0, sizeof(struct input_dev)); init_input_dev(&psmouse->dev); psmouse->dev.private = psmouse; psmouse->dev.dev = &psmouse->ps2dev.serio->dev; psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL); psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT); psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y); psmouse->set_rate = psmouse_set_rate; psmouse->set_resolution = psmouse_set_resolution; psmouse->protocol_handler = psmouse_process_byte; psmouse->pktsize = 3; if (proto && (proto->detect || proto->init)) { if (proto->detect && proto->detect(psmouse, 1) < 0) return -1; if (proto->init && proto->init(psmouse) < 0) return -1; psmouse->type = proto->type; } else psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1); sprintf(psmouse->devname, "%s %s %s", psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); psmouse->dev.name = psmouse->devname; psmouse->dev.phys = psmouse->phys; psmouse->dev.id.bustype = BUS_I8042; psmouse->dev.id.vendor = 0x0002; psmouse->dev.id.product = psmouse->type; psmouse->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; int retval; down(&psmouse_sem); /* * 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); } if (!(psmouse = kcalloc(1, sizeof(struct psmouse), GFP_KERNEL))) { retval = -ENOMEM; goto out; } ps2_init(&psmouse->ps2dev, serio); sprintf(psmouse->phys, "%s/input0", serio->phys); psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); serio_set_drvdata(serio, psmouse); retval = serio_open(serio, drv); if (retval) { serio_set_drvdata(serio, NULL); kfree(psmouse); goto out; } if (psmouse_probe(psmouse) < 0) { serio_close(serio); serio_set_drvdata(serio, NULL); kfree(psmouse); retval = -ENODEV; goto out; } psmouse->rate = psmouse_rate; psmouse->resolution = psmouse_resolution; psmouse->resetafter = psmouse_resetafter; psmouse->smartscroll = psmouse_smartscroll; psmouse_switch_protocol(psmouse, NULL); input_register_device(&psmouse->dev); printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); psmouse_initialize(psmouse); if (parent && parent->pt_activate) parent->pt_activate(parent); device_create_file(&serio->dev, &psmouse_attr_protocol); device_create_file(&serio->dev, &psmouse_attr_rate); device_create_file(&serio->dev, &psmouse_attr_resolution); device_create_file(&serio->dev, &psmouse_attr_resetafter); psmouse_activate(psmouse); retval = 0; out: /* If this is a pass-through port the parent needs to be re-activated */ if (parent) psmouse_activate(parent); up(&psmouse_sem); return retval; } static int psmouse_reconnect(struct serio *serio) { struct psmouse *psmouse = serio_get_drvdata(serio); struct psmouse *parent = NULL; struct serio_driver *drv = serio->drv; int rc = -1; if (!drv || !psmouse) { printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); return -1; } down(&psmouse_sem); 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 (psmouse->reconnect) { if (psmouse->reconnect(psmouse)) goto out; } else if (psmouse_probe(psmouse) < 0 || psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0)) goto out; /* ok, the device type (and capabilities) match the old one, * we can continue using it, complete intialization */ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); psmouse_initialize(psmouse); if (parent && parent->pt_activate) parent->pt_activate(parent); psmouse_activate(psmouse); rc = 0; out: /* If this is a pass-through port the parent waits to be activated */ if (parent) psmouse_activate(parent); up(&psmouse_sem); return rc; } 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, .disconnect = psmouse_disconnect, .cleanup = psmouse_cleanup, }; ssize_t psmouse_attr_show_helper(struct device *dev, char *buf, ssize_t (*handler)(struct psmouse *, char *)) { struct serio *serio = to_serio_port(dev); int retval; retval = serio_pin_driver(serio); if (retval) return retval; if (serio->drv != &psmouse_drv) { retval = -ENODEV; goto out; } retval = handler(serio_get_drvdata(serio), buf); out: serio_unpin_driver(serio); return retval; } ssize_t psmouse_attr_set_helper(struct device *dev, const char *buf, size_t count, ssize_t (*handler)(struct psmouse *, const char *, size_t)) { struct serio *serio = to_serio_port(dev); struct psmouse *psmouse = serio_get_drvdata(serio); struct psmouse *parent = NULL; int retval; retval = serio_pin_driver(serio); if (retval) return retval; if (serio->drv != &psmouse_drv) { retval = -ENODEV; goto out_unpin; } retval = down_interruptible(&psmouse_sem); if (retval) goto out_unpin; if (psmouse->state == PSMOUSE_IGNORE) { retval = -ENODEV; goto out_up; } if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { parent = serio_get_drvdata(serio->parent); psmouse_deactivate(parent); } psmouse_deactivate(psmouse); retval = handler(psmouse, buf, count); if (retval != -ENODEV) psmouse_activate(psmouse); if (parent) psmouse_activate(parent); out_up: up(&psmouse_sem); out_unpin: serio_unpin_driver(serio); return retval; } static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, char *buf) { return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); } static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, const char *buf, size_t count) { struct serio *serio = psmouse->ps2dev.serio; struct psmouse *parent = NULL; struct psmouse_protocol *proto; int retry = 0; if (!(proto = psmouse_protocol_by_name(buf, count))) return -EINVAL; if (psmouse->type == proto->type) return count; while (serio->child) { if (++retry > 3) { printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n"); return -EIO; } up(&psmouse_sem); serio_unpin_driver(serio); serio_unregister_child_port(serio); serio_pin_driver_uninterruptible(serio); down(&psmouse_sem); if (serio->drv != &psmouse_drv) return -ENODEV; if (psmouse->type == proto->type) 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); } if (psmouse->disconnect) psmouse->disconnect(psmouse); psmouse_set_state(psmouse, PSMOUSE_IGNORE); input_unregister_device(&psmouse->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); input_register_device(&psmouse->dev); printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys); if (parent && parent->pt_activate) parent->pt_activate(parent); return count; } static ssize_t psmouse_attr_show_rate(struct psmouse *psmouse, char *buf) { return sprintf(buf, "%d\n", psmouse->rate); } static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, const char *buf, size_t count) { unsigned long value; char *rest; value = simple_strtoul(buf, &rest, 10); if (*rest) return -EINVAL; psmouse->set_rate(psmouse, value); return count; } static ssize_t psmouse_attr_show_resolution(struct psmouse *psmouse, char *buf) { return sprintf(buf, "%d\n", psmouse->resolution); } static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, const char *buf, size_t count) { unsigned long value; char *rest; value = simple_strtoul(buf, &rest, 10); if (*rest) return -EINVAL; psmouse->set_resolution(psmouse, value); return count; } static ssize_t psmouse_attr_show_resetafter(struct psmouse *psmouse, char *buf) { return sprintf(buf, "%d\n", psmouse->resetafter); } static ssize_t psmouse_attr_set_resetafter(struct psmouse *psmouse, const char *buf, size_t count) { unsigned long value; char *rest; value = simple_strtoul(buf, &rest, 10); if (*rest) return -EINVAL; psmouse->resetafter = value; return count; } static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) { 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, 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) { serio_register_driver(&psmouse_drv); return 0; } static void __exit psmouse_exit(void) { serio_unregister_driver(&psmouse_drv); } module_init(psmouse_init); module_exit(psmouse_exit);