Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1011 insertions, 0 deletions

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
new file mode 100644
index 000000000000..cd8509549eac
--- /dev/null
+++ b/drivers/input/mouse/psmouse-base.c
@@ -0,0 +1,1011 @@
+/*
+ * 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 <linux/delay.h>
+#include <linux/module.h>
+#include <linux/moduleparam.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 "psmouse.h"
+#include "synaptics.h"
+#include "logips2pp.h"
+#include "alps.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 = -1U;
+static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
+static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
+static char *psmouse_proto_abbrev[] = { NULL, "bare", NULL, NULL, NULL, "imps", "exps", NULL, NULL, NULL };
+#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(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=");
+
+static char *psmouse_protocols[] = { "None", "PS/2", "PS2++", "ThinkPS/2", "GenPS/2", "ImPS/2", "ImExPS/2", "SynPS/2", "AlpsPS/2" };
+
+/*
+ * 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(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(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 (!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;
+
+/*
+ * 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;
+
+/*
+ * 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;
+}
+
+/*
+ * 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.
+ */
+
+        param[0] = 0xa5;
+        if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
+                return -1;
+
+        if (param[0] != 0x00 && param[0] != 0x03 && param[0] != 0x04)
+                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, &params[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;
+
+        device_remove_file(&serio->dev, &psmouse_attr_rate);
+        device_remove_file(&serio->dev, &psmouse_attr_resolution);
+        device_remove_file(&serio->dev, &psmouse_attr_resetafter);
+
+        psmouse = serio_get_drvdata(serio);
+        psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+
+        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);
+        serio_close(serio);
+        serio_set_drvdata(serio, NULL);
+        kfree(psmouse);
+}
+
+/*
+ * 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;
+
+        /*
+         * 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 = kmalloc(sizeof(struct psmouse), GFP_KERNEL))) {
+                retval = -ENOMEM;
+                goto out;
+        }
+
+        memset(psmouse, 0, sizeof(struct psmouse));
+
+        ps2_init(&psmouse->ps2dev, serio);
+        sprintf(psmouse->phys, "%s/input0", serio->phys);
+        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->dev.private = psmouse;
+        psmouse->dev.dev = &serio->dev;
+        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->set_rate = psmouse_set_rate;
+        psmouse->set_resolution = psmouse_set_resolution;
+        psmouse->protocol_handler = psmouse_process_byte;
+        psmouse->pktsize = 3;
+
+        psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
+
+        sprintf(psmouse->devname, "%s %s %s",
+                psmouse_protocols[psmouse->type], 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;
+
+        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_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 awaits to be activated */
+        if (parent)
+                psmouse_activate(parent);
+
+        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;
+        }
+
+        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);
+
+        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;
+        }
+
+        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);
+
+        psmouse_activate(psmouse);
+        if (parent)
+                psmouse_activate(parent);
+
+out:
+        serio_unpin_driver(serio);
+        return retval;
+}
+
+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)
+{
+        int i;
+
+        if (!val)
+                return -EINVAL;
+
+        if (!strncmp(val, "any", 3)) {
+                *((unsigned int *)kp->arg) = -1UL;
+                return 0;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(psmouse_proto_abbrev); i++) {
+                if (!psmouse_proto_abbrev[i])
+                        continue;
+
+                if (!strncmp(val, psmouse_proto_abbrev[i], strlen(psmouse_proto_abbrev[i]))) {
+                        *((unsigned int *)kp->arg) = i;
+                        return 0;
+                }
+        }
+
+        return -EINVAL;                                 \
+}
+
+static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
+{
+        return sprintf(buffer, "%s\n",
+                        psmouse_max_proto < ARRAY_SIZE(psmouse_proto_abbrev) ?
+                                psmouse_proto_abbrev[psmouse_max_proto] : "any");
+}
+
+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);