--- /dev/null
+/*
+ * PS/2 mouse driver
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2003-2004 Dmitry Torokhov
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define psmouse_fmt(fmt) fmt
+
+#include <linux/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 "psmouse.h"
+#include "synaptics.h"
+#include "logips2pp.h"
+#include "alps.h"
+#include "hgpk.h"
+#include "lifebook.h"
+#include "trackpoint.h"
+#include "touchkit_ps2.h"
+#include "elantech.h"
+#include "sentelic.h"
+#include "cypress_ps2.h"
+#include "focaltech.h"
+#include "vmmouse.h"
+
+#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 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 = 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 = 5;
+module_param_named(resetafter, psmouse_resetafter, uint, 0644);
+MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
+
+static unsigned int psmouse_resync_time;
+module_param_named(resync_time, psmouse_resync_time, uint, 0644);
+MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
+
+PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
+ NULL,
+ psmouse_attr_show_protocol, psmouse_attr_set_protocol);
+PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, rate),
+ psmouse_show_int_attr, psmouse_attr_set_rate);
+PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resolution),
+ psmouse_show_int_attr, psmouse_attr_set_resolution);
+PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resetafter),
+ psmouse_show_int_attr, psmouse_set_int_attr);
+PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resync_time),
+ psmouse_show_int_attr, psmouse_set_int_attr);
+
+static struct attribute *psmouse_attributes[] = {
+ &psmouse_attr_protocol.dattr.attr,
+ &psmouse_attr_rate.dattr.attr,
+ &psmouse_attr_resolution.dattr.attr,
+ &psmouse_attr_resetafter.dattr.attr,
+ &psmouse_attr_resync_time.dattr.attr,
+ NULL
+};
+
+static struct attribute_group psmouse_attribute_group = {
+ .attrs = psmouse_attributes,
+};
+
+/*
+ * psmouse_mutex protects all operations changing state of mouse
+ * (connecting, disconnecting, changing rate or resolution via
+ * sysfs). We could use a per-device semaphore but since there
+ * rarely more than one PS/2 mouse connected and since semaphore
+ * is taken in "slow" paths it is not worth it.
+ */
+static DEFINE_MUTEX(psmouse_mutex);
+
+static struct workqueue_struct *kpsmoused_wq;
+
+struct psmouse_protocol {
+ enum psmouse_type type;
+ bool maxproto;
+ bool ignore_parity; /* Protocol should ignore parity errors from KBC */
+ const char *name;
+ const char *alias;
+ int (*detect)(struct psmouse *, bool);
+ 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.
+ */
+
+psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
+{
+ 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
+ */
+
+/*
+ * 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) {
+ switch (packet[3] & 0xC0) {
+ case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
+ input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
+ break;
+ case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
+ input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
+ break;
+ case 0x00:
+ case 0xC0:
+ 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);
+ break;
+ }
+ }
+
+/*
+ * 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;
+ }
+
+/*
+ * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
+ * byte.
+ */
+ if (psmouse->type == PSMOUSE_CORTRON) {
+ input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
+ packet[0] |= 0x08;
+ }
+
+/*
+ * 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;
+}
+
+void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
+ unsigned long delay)
+{
+ queue_delayed_work(kpsmoused_wq, work, delay);
+}
+
+/*
+ * __psmouse_set_state() sets new psmouse state and resets all flags.
+ */
+
+static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
+{
+ psmouse->state = new_state;
+ psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
+ psmouse->ps2dev.flags = 0;
+ psmouse->last = jiffies;
+}
+
+
+/*
+ * psmouse_set_state() sets new psmouse state and resets all flags and
+ * counters while holding serio lock so fighting with interrupt handler
+ * is not a concern.
+ */
+
+void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
+{
+ serio_pause_rx(psmouse->ps2dev.serio);
+ __psmouse_set_state(psmouse, new_state);
+ serio_continue_rx(psmouse->ps2dev.serio);
+}
+
+/*
+ * psmouse_handle_byte() processes one byte of the input data stream
+ * by calling corresponding protocol handler.
+ */
+
+static int psmouse_handle_byte(struct psmouse *psmouse)
+{
+ psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
+
+ switch (rc) {
+ case PSMOUSE_BAD_DATA:
+ if (psmouse->state == PSMOUSE_ACTIVATED) {
+ psmouse_warn(psmouse,
+ "%s at %s lost sync at byte %d\n",
+ psmouse->name, psmouse->phys,
+ psmouse->pktcnt);
+ if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
+ __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ psmouse_notice(psmouse,
+ "issuing reconnect request\n");
+ serio_reconnect(psmouse->ps2dev.serio);
+ return -1;
+ }
+ }
+ 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;
+}
+
+/*
+ * psmouse_interrupt() handles incoming characters, either passing them
+ * for normal processing or gathering them as command response.
+ */
+
+static irqreturn_t psmouse_interrupt(struct serio *serio,
+ unsigned char data, unsigned int flags)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+
+ if (psmouse->state == PSMOUSE_IGNORE)
+ goto out;
+
+ if (unlikely((flags & SERIO_TIMEOUT) ||
+ ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
+
+ if (psmouse->state == PSMOUSE_ACTIVATED)
+ psmouse_warn(psmouse,
+ "bad data from KBC -%s%s\n",
+ flags & SERIO_TIMEOUT ? " timeout" : "",
+ flags & SERIO_PARITY ? " bad parity" : "");
+ ps2_cmd_aborted(&psmouse->ps2dev);
+ goto out;
+ }
+
+ if (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_RESYNCING)
+ goto out;
+
+ if (psmouse->state == PSMOUSE_ACTIVATED &&
+ psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
+ psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
+ psmouse->name, psmouse->phys, psmouse->pktcnt);
+ psmouse->badbyte = psmouse->packet[0];
+ __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
+ goto out;
+ }
+
+ psmouse->packet[psmouse->pktcnt++] = data;
+/*
+ * Check if this is a new device announcement (0xAA 0x00)
+ */
+ if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
+ if (psmouse->pktcnt == 1) {
+ psmouse->last = jiffies;
+ goto out;
+ }
+
+ if (psmouse->packet[1] == PSMOUSE_RET_ID ||
+ (psmouse->type == PSMOUSE_HGPK &&
+ psmouse->packet[1] == PSMOUSE_RET_BAT)) {
+ __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ serio_reconnect(serio);
+ goto out;
+ }
+/*
+ * Not a new device, try processing first byte normally
+ */
+ psmouse->pktcnt = 1;
+ if (psmouse_handle_byte(psmouse))
+ goto out;
+
+ psmouse->packet[psmouse->pktcnt++] = data;
+ }
+
+/*
+ * See if we need to force resync because mouse was idle for too long
+ */
+ if (psmouse->state == PSMOUSE_ACTIVATED &&
+ psmouse->pktcnt == 1 && psmouse->resync_time &&
+ time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
+ psmouse->badbyte = psmouse->packet[0];
+ __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
+ goto out;
+ }
+
+ psmouse->last = jiffies;
+ psmouse_handle_byte(psmouse);
+
+ out:
+ return IRQ_HANDLED;
+}
+
+
+/*
+ * psmouse_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;
+}
+
+/*
+ * Here we set the mouse resolution.
+ */
+
+void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
+{
+ static const unsigned char params[] = { 0, 1, 2, 2, 3 };
+ unsigned char 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 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
+ unsigned char 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;
+ 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_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;
+ 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, bool 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;
+
+/* 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;
+ unsigned char param[2];
+ static const unsigned char 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 -1;
+
+ 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.
+ */
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ }
+
+ 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;
+}
+
+/*
+ * 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;
+
+ memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
+ memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
+ memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
+ memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
+ memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
+
+ __set_bit(EV_KEY, input_dev->evbit);
+ __set_bit(EV_REL, input_dev->evbit);
+
+ __set_bit(BTN_LEFT, input_dev->keybit);
+ __set_bit(BTN_RIGHT, input_dev->keybit);
+
+ __set_bit(REL_X, input_dev->relbit);
+ __set_bit(REL_Y, input_dev->relbit);
+
+ __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+
+ 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->disconnect = NULL;
+ psmouse->cleanup = NULL;
+ psmouse->pt_activate = NULL;
+ psmouse->pt_deactivate = NULL;
+}
+
+/*
+ * Apply default settings to the psmouse structure and call specified
+ * protocol detection or initialization routine.
+ */
+static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
+ bool set_properties),
+ struct psmouse *psmouse, bool set_properties)
+{
+ if (set_properties)
+ psmouse_apply_defaults(psmouse);
+
+ return detect(psmouse, set_properties);
+}
+
+/*
+ * 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;
+
+/* Always check for focaltech, this is safe as it uses pnp-id matching */
+ if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) {
+ if (max_proto > PSMOUSE_IMEX) {
+ if (!set_properties || focaltech_init(psmouse) == 0) {
+ if (IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH))
+ return PSMOUSE_FOCALTECH;
+ /*
+ * Note that we need to also restrict
+ * psmouse_max_proto so that psmouse_initialize()
+ * does not try to reset rate and resolution,
+ * because even that upsets the device.
+ */
+ psmouse_max_proto = PSMOUSE_PS2;
+ return PSMOUSE_PS2;
+ }
+ }
+ }
+
+/*
+ * We always check for lifebook because it does not disturb mouse
+ * (it only checks DMI information).
+ */
+ if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
+ if (max_proto > PSMOUSE_IMEX) {
+ if (!set_properties || lifebook_init(psmouse) == 0)
+ return PSMOUSE_LIFEBOOK;
+ }
+ }
+
+ if (psmouse_do_detect(vmmouse_detect, psmouse, set_properties) == 0) {
+ if (max_proto > PSMOUSE_IMEX) {
+ if (!set_properties || vmmouse_init(psmouse) == 0)
+ return PSMOUSE_VMMOUSE;
+ }
+ }
+
+/*
+ * Try Kensington ThinkingMouse (we try first, because synaptics probe
+ * upsets the thinkingmouse).
+ */
+
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
+ 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, set_properties) == 0) {
+ 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) &&
+ (!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 Cypress Trackpad.
+ * Must try it before Finger Sensing Pad because Finger Sensing Pad probe
+ * upsets some modules of Cypress Trackpads.
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ cypress_detect(psmouse, set_properties) == 0) {
+ if (IS_ENABLED(CONFIG_MOUSE_PS2_CYPRESS)) {
+ if (cypress_init(psmouse) == 0)
+ return PSMOUSE_CYPRESS;
+
+ /*
+ * Finger Sensing Pad probe upsets some modules of
+ * Cypress Trackpad, must avoid Finger Sensing Pad
+ * probe if Cypress Trackpad device detected.
+ */
+ return PSMOUSE_PS2;
+ }
+
+ max_proto = PSMOUSE_IMEX;
+ }
+
+/*
+ * Try ALPS TouchPad
+ */
+ if (max_proto > PSMOUSE_IMEX) {
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+ if (psmouse_do_detect(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;
+ }
+ }
+
+/*
+ * Try OLPC HGPK touchpad.
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
+ if (!set_properties || hgpk_init(psmouse) == 0)
+ return PSMOUSE_HGPK;
+/*
+ * Init failed, try basic relative protocols
+ */
+ max_proto = PSMOUSE_IMEX;
+ }
+
+/*
+ * Try Elantech touchpad.
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
+ if (!set_properties || elantech_init(psmouse) == 0)
+ return PSMOUSE_ELANTECH;
+/*
+ * Init failed, try basic relative protocols
+ */
+ max_proto = PSMOUSE_IMEX;
+ }
+
+ if (max_proto > PSMOUSE_IMEX) {
+ if (psmouse_do_detect(genius_detect,
+ psmouse, set_properties) == 0)
+ return PSMOUSE_GENPS;
+
+ if (psmouse_do_detect(ps2pp_init,
+ psmouse, set_properties) == 0)
+ return PSMOUSE_PS2PP;
+
+ if (psmouse_do_detect(trackpoint_detect,
+ psmouse, set_properties) == 0)
+ return PSMOUSE_TRACKPOINT;
+
+ if (psmouse_do_detect(touchkit_ps2_detect,
+ psmouse, set_properties) == 0)
+ 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) {
+ if (psmouse_do_detect(fsp_detect,
+ psmouse, set_properties) == 0) {
+ if (!set_properties || fsp_init(psmouse) == 0)
+ return PSMOUSE_FSP;
+/*
+ * Init failed, try basic relative protocols
+ */
+ max_proto = PSMOUSE_IMEX;
+ }
+ }
+
+/*
+ * 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_do_detect(im_explorer_detect,
+ psmouse, set_properties) == 0) {
+ return PSMOUSE_IMEX;
+ }
+
+ if (max_proto >= PSMOUSE_IMPS &&
+ psmouse_do_detect(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.
+ */
+ psmouse_do_detect(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);
+ }
+
+ return PSMOUSE_PS2;
+}
+
+static const struct psmouse_protocol psmouse_protocols[] = {
+ {
+ .type = PSMOUSE_PS2,
+ .name = "PS/2",
+ .alias = "bare",
+ .maxproto = true,
+ .ignore_parity = true,
+ .detect = ps2bare_detect,
+ },
+#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
+ {
+ .type = PSMOUSE_PS2PP,
+ .name = "PS2++",
+ .alias = "logitech",
+ .detect = ps2pp_init,
+ },
+#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,
+ },
+ {
+ .type = PSMOUSE_IMEX,
+ .name = "ImExPS/2",
+ .alias = "exps",
+ .maxproto = true,
+ .ignore_parity = true,
+ .detect = im_explorer_detect,
+ },
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+ {
+ .type = PSMOUSE_SYNAPTICS,
+ .name = "SynPS/2",
+ .alias = "synaptics",
+ .detect = synaptics_detect,
+ .init = synaptics_init,
+ },
+ {
+ .type = PSMOUSE_SYNAPTICS_RELATIVE,
+ .name = "SynRelPS/2",
+ .alias = "synaptics-relative",
+ .detect = synaptics_detect,
+ .init = synaptics_init_relative,
+ },
+#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",
+ .init = lifebook_init,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
+ {
+ .type = PSMOUSE_TRACKPOINT,
+ .name = "TPPS/2",
+ .alias = "trackpoint",
+ .detect = trackpoint_detect,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
+ {
+ .type = PSMOUSE_TOUCHKIT_PS2,
+ .name = "touchkitPS/2",
+ .alias = "touchkit",
+ .detect = touchkit_ps2_detect,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_OLPC
+ {
+ .type = PSMOUSE_HGPK,
+ .name = "OLPC HGPK",
+ .alias = "hgpk",
+ .detect = hgpk_detect,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_ELANTECH
+ {
+ .type = PSMOUSE_ELANTECH,
+ .name = "ETPS/2",
+ .alias = "elantech",
+ .detect = elantech_detect,
+ .init = elantech_init,
+ },
+#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
+ {
+ .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];
+
+ 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;
+}
+
+
+/*
+ * 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))
+ psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
+ ps2dev->serio->phys);
+
+ 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)
+{
+ if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
+ psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+ return -1;
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ return 0;
+}
+
+
+/*
+ * psmouse_resync() attempts to re-validate current protocol.
+ */
+
+static void psmouse_resync(struct work_struct *work)
+{
+ struct psmouse *parent = NULL, *psmouse =
+ container_of(work, struct psmouse, resync_work.work);
+ struct serio *serio = psmouse->ps2dev.serio;
+ psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
+ bool failed = false, enabled = false;
+ int i;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (psmouse->state != PSMOUSE_RESYNCING)
+ goto out;
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+/*
+ * Some mice don't ACK commands sent while they are in the middle of
+ * transmitting motion packet. To avoid delay we use ps2_sendbyte()
+ * instead of ps2_command() which would wait for 200ms for an ACK
+ * that may never come.
+ * As an additional quirk ALPS touchpads may not only forget to ACK
+ * disable command but will stop reporting taps, so if we see that
+ * mouse at least once ACKs disable we will do full reconnect if ACK
+ * is missing.
+ */
+ psmouse->num_resyncs++;
+
+ if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
+ if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
+ failed = true;
+ } else
+ psmouse->acks_disable_command = true;
+
+/*
+ * Poll the mouse. If it was reset the packet will be shorter than
+ * psmouse->pktsize and ps2_command will fail. We do not expect and
+ * do not handle scenario when mouse "upgrades" its protocol while
+ * disconnected since it would require additional delay. If we ever
+ * see a mouse that does it we'll adjust the code.
+ */
+ if (!failed) {
+ if (psmouse->poll(psmouse))
+ failed = true;
+ else {
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ for (i = 0; i < psmouse->pktsize; i++) {
+ psmouse->pktcnt++;
+ rc = psmouse->protocol_handler(psmouse);
+ if (rc != PSMOUSE_GOOD_DATA)
+ break;
+ }
+ if (rc != PSMOUSE_FULL_PACKET)
+ failed = true;
+ psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ }
+ }
+/*
+ * Now try to enable mouse. We try to do that even if poll failed and also
+ * repeat our attempts 5 times, otherwise we may be left out with disabled
+ * mouse.
+ */
+ for (i = 0; i < 5; i++) {
+ if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
+ enabled = true;
+ break;
+ }
+ msleep(200);
+ }
+
+ if (!enabled) {
+ psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+ failed = true;
+ }
+
+ if (failed) {
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ psmouse_info(psmouse,
+ "resync failed, issuing reconnect request\n");
+ serio_reconnect(serio);
+ } else
+ psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
+
+ if (parent)
+ psmouse_activate(parent);
+ out:
+ mutex_unlock(&psmouse_mutex);
+}
+
+/*
+ * psmouse_cleanup() resets the mouse into power-on state.
+ */
+
+static void psmouse_cleanup(struct serio *serio)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+ struct psmouse *parent = NULL;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ /*
+ * Disable stream mode so cleanup routine can proceed undisturbed.
+ */
+ if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
+ psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+
+ if (psmouse->cleanup)
+ psmouse->cleanup(psmouse);
+
+/*
+ * Reset the mouse to defaults (bare PS/2 protocol).
+ */
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+
+/*
+ * Some boxes, such as HP nx7400, get terribly confused if mouse
+ * is not fully enabled before suspending/shutting down.
+ */
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+
+ if (parent) {
+ if (parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+
+ psmouse_activate(parent);
+ }
+
+ mutex_unlock(&psmouse_mutex);
+}
+
+/*
+ * psmouse_disconnect() closes and frees.
+ */
+
+static void psmouse_disconnect(struct serio *serio)
+{
+ struct psmouse *psmouse, *parent = NULL;
+
+ psmouse = serio_get_drvdata(serio);
+
+ sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
+
+ mutex_lock(&psmouse_mutex);
+
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+
+ /* make sure we don't have a resync in progress */
+ mutex_unlock(&psmouse_mutex);
+ flush_workqueue(kpsmoused_wq);
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+
+ if (parent && parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+
+ serio_close(serio);
+ serio_set_drvdata(serio, NULL);
+ 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;
+
+ 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;
+
+ psmouse->type = proto->type;
+ selected_proto = proto;
+ } else {
+ psmouse->type = psmouse_extensions(psmouse,
+ psmouse_max_proto, true);
+ selected_proto = psmouse_protocol_by_type(psmouse->type);
+ }
+
+ psmouse->ignore_parity = selected_proto->ignore_parity;
+
+ /*
+ * 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->type;
+ input_dev->id.version = psmouse->model;
+
+ return 0;
+}
+
+/*
+ * psmouse_connect() is a callback from the serio module when
+ * an unhandled serio port is found.
+ */
+static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
+{
+ struct psmouse *psmouse, *parent = NULL;
+ struct input_dev *input_dev;
+ int retval = 0, error = -ENOMEM;
+
+ mutex_lock(&psmouse_mutex);
+
+ /*
+ * If this is a pass-through port deactivate parent so the device
+ * connected to this port can be successfully identified
+ */
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!psmouse || !input_dev)
+ goto err_free;
+
+ ps2_init(&psmouse->ps2dev, serio);
+ INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
+ psmouse->dev = input_dev;
+ snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ serio_set_drvdata(serio, psmouse);
+
+ error = serio_open(serio, drv);
+ if (error)
+ goto err_clear_drvdata;
+
+ 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);
+
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ psmouse_initialize(psmouse);
+
+ error = input_register_device(psmouse->dev);
+ if (error)
+ goto err_protocol_disconnect;
+
+ if (parent && parent->pt_activate)
+ parent->pt_activate(parent);
+
+ error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
+ if (error)
+ goto err_pt_deactivate;
+
+ psmouse_activate(psmouse);
+
+ out:
+ /* If this is a pass-through port the parent needs to be re-activated */
+ if (parent)
+ psmouse_activate(parent);
+
+ mutex_unlock(&psmouse_mutex);
+ return retval;
+
+ err_pt_deactivate:
+ if (parent && parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+ input_unregister_device(psmouse->dev);
+ input_dev = NULL; /* so we don't try to free it below */
+ err_protocol_disconnect:
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ err_close_serio:
+ serio_close(serio);
+ err_clear_drvdata:
+ serio_set_drvdata(serio, NULL);
+ err_free:
+ input_free_device(input_dev);
+ kfree(psmouse);
+
+ retval = error;
+ goto out;
+}
+
+
+static int psmouse_reconnect(struct serio *serio)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+ struct psmouse *parent = NULL;
+ unsigned char type;
+ int rc = -1;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ if (psmouse->reconnect) {
+ if (psmouse->reconnect(psmouse))
+ goto out;
+ } else {
+ psmouse_reset(psmouse);
+
+ if (psmouse_probe(psmouse) < 0)
+ goto out;
+
+ type = psmouse_extensions(psmouse, psmouse_max_proto, false);
+ if (psmouse->type != type)
+ goto out;
+ }
+
+ /*
+ * OK, the device type (and capabilities) match the old one,
+ * we can continue using it, complete initialization
+ */
+ 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);
+
+ mutex_unlock(&psmouse_mutex);
+ 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, 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 = serio_get_drvdata(serio);
+
+ return attr->show(psmouse, attr->data, buf);
+}
+
+ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct serio *serio = to_serio_port(dev);
+ struct psmouse_attribute *attr = to_psmouse_attr(devattr);
+ struct psmouse *psmouse, *parent = NULL;
+ int retval;
+
+ retval = mutex_lock_interruptible(&psmouse_mutex);
+ if (retval)
+ goto out;
+
+ psmouse = serio_get_drvdata(serio);
+
+ if (attr->protect) {
+ if (psmouse->state == PSMOUSE_IGNORE) {
+ retval = -ENODEV;
+ goto out_unlock;
+ }
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse_deactivate(psmouse);
+ }
+
+ retval = attr->set(psmouse, attr->data, buf, count);
+
+ if (attr->protect) {
+ if (retval != -ENODEV)
+ 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_by_type(psmouse->type)->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->type == proto->type)
+ 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->type == proto->type) {
+ input_free_device(new_dev);
+ return count; /* switched by other thread */
+ }
+ }
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ if (parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+ }
+
+ old_dev = psmouse->dev;
+ old_proto = psmouse_protocol_by_type(psmouse->type);
+
+ 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);
+
+ 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;
+ }
+
+ input_unregister_device(old_dev);
+
+ if (parent && parent->pt_activate)
+ parent->pt_activate(parent);
+
+ return count;
+}
+
+static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+ unsigned int value;
+ int err;
+
+ err = kstrtouint(buf, 10, &value);
+ if (err)
+ return err;
+
+ psmouse->set_rate(psmouse, value);
+ return count;
+}
+
+static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+ unsigned int value;
+ int err;
+
+ err = kstrtouint(buf, 10, &value);
+ if (err)
+ return err;
+
+ psmouse->set_resolution(psmouse, value);
+ return count;
+}
+
+
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
+{
+ const struct psmouse_protocol *proto;
+
+ if (!val)
+ return -EINVAL;
+
+ proto = psmouse_protocol_by_name(val, strlen(val));
+
+ if (!proto || !proto->maxproto)
+ return -EINVAL;
+
+ *((unsigned int *)kp->arg) = proto->type;
+
+ return 0;
+}
+
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
+{
+ int type = *((unsigned int *)kp->arg);
+
+ return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
+}
+
+static int __init psmouse_init(void)
+{
+ int err;
+
+ lifebook_module_init();
+ synaptics_module_init();
+ hgpk_module_init();
+
+ kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
+ if (!kpsmoused_wq) {
+ pr_err("failed to create kpsmoused workqueue\n");
+ return -ENOMEM;
+ }
+
+ err = serio_register_driver(&psmouse_drv);
+ if (err)
+ destroy_workqueue(kpsmoused_wq);
+
+ return err;
+}
+
+static void __exit psmouse_exit(void)
+{
+ serio_unregister_driver(&psmouse_drv);
+ destroy_workqueue(kpsmoused_wq);
+}
+
+module_init(psmouse_init);
+module_exit(psmouse_exit);
Code Review / kvmfornfv.git / blobdiff