v4.19.13 snapshot.
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
new file mode 100644
index 0000000..d3ff1fc
--- /dev/null
+++ b/drivers/input/mouse/psmouse-base.c
@@ -0,0 +1,2090 @@
+/*
+ * PS/2 mouse driver
+ *
+ * Copyright (c) 1999-2002 Vojtech Pavlik
+ * Copyright (c) 2003-2004 Dmitry Torokhov
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#define psmouse_fmt(fmt) fmt
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+#include <linux/libps2.h>
+#include <linux/mutex.h>
+#include <linux/types.h>
+
+#include "psmouse.h"
+#include "synaptics.h"
+#include "logips2pp.h"
+#include "alps.h"
+#include "hgpk.h"
+#include "lifebook.h"
+#include "trackpoint.h"
+#include "touchkit_ps2.h"
+#include "elantech.h"
+#include "sentelic.h"
+#include "cypress_ps2.h"
+#include "focaltech.h"
+#include "vmmouse.h"
+#include "byd.h"
+
+#define DRIVER_DESC "PS/2 mouse driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
+static const struct kernel_param_ops param_ops_proto_abbrev = {
+ .set = psmouse_set_maxproto,
+ .get = psmouse_get_maxproto,
+};
+#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
+module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
+MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
+
+static unsigned int psmouse_resolution = 200;
+module_param_named(resolution, psmouse_resolution, uint, 0644);
+MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
+
+static unsigned int psmouse_rate = 100;
+module_param_named(rate, psmouse_rate, uint, 0644);
+MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
+
+static bool psmouse_smartscroll = true;
+module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
+MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
+
+static bool psmouse_a4tech_2wheels;
+module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
+MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
+
+static unsigned int psmouse_resetafter = 5;
+module_param_named(resetafter, psmouse_resetafter, uint, 0644);
+MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
+
+static unsigned int psmouse_resync_time;
+module_param_named(resync_time, psmouse_resync_time, uint, 0644);
+MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
+
+PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
+ NULL,
+ psmouse_attr_show_protocol, psmouse_attr_set_protocol);
+PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, rate),
+ psmouse_show_int_attr, psmouse_attr_set_rate);
+PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resolution),
+ psmouse_show_int_attr, psmouse_attr_set_resolution);
+PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resetafter),
+ psmouse_show_int_attr, psmouse_set_int_attr);
+PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
+ (void *) offsetof(struct psmouse, resync_time),
+ psmouse_show_int_attr, psmouse_set_int_attr);
+
+static struct attribute *psmouse_attributes[] = {
+ &psmouse_attr_protocol.dattr.attr,
+ &psmouse_attr_rate.dattr.attr,
+ &psmouse_attr_resolution.dattr.attr,
+ &psmouse_attr_resetafter.dattr.attr,
+ &psmouse_attr_resync_time.dattr.attr,
+ NULL
+};
+
+static const struct attribute_group psmouse_attribute_group = {
+ .attrs = psmouse_attributes,
+};
+
+/*
+ * psmouse_mutex protects all operations changing state of mouse
+ * (connecting, disconnecting, changing rate or resolution via
+ * sysfs). We could use a per-device semaphore but since there
+ * rarely more than one PS/2 mouse connected and since semaphore
+ * is taken in "slow" paths it is not worth it.
+ */
+static DEFINE_MUTEX(psmouse_mutex);
+
+static struct workqueue_struct *kpsmoused_wq;
+
+void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
+{
+ input_report_key(dev, BTN_LEFT, buttons & BIT(0));
+ input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
+ input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
+}
+
+void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
+{
+ int x, y;
+
+ x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
+ y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
+
+ input_report_rel(dev, REL_X, x);
+ input_report_rel(dev, REL_Y, -y);
+}
+
+void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
+{
+ psmouse_report_standard_buttons(dev, packet[0]);
+ psmouse_report_standard_motion(dev, packet);
+}
+
+/*
+ * psmouse_process_byte() analyzes the PS/2 data stream and reports
+ * relevant events to the input module once full packet has arrived.
+ */
+psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
+{
+ struct input_dev *dev = psmouse->dev;
+ u8 *packet = psmouse->packet;
+ int wheel;
+
+ if (psmouse->pktcnt < psmouse->pktsize)
+ return PSMOUSE_GOOD_DATA;
+
+ /* Full packet accumulated, process it */
+
+ switch (psmouse->protocol->type) {
+ case PSMOUSE_IMPS:
+ /* IntelliMouse has scroll wheel */
+ input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
+ break;
+
+ case PSMOUSE_IMEX:
+ /* Scroll wheel and buttons on IntelliMouse Explorer */
+ switch (packet[3] & 0xC0) {
+ case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
+ input_report_rel(dev, REL_WHEEL,
+ -sign_extend32(packet[3], 5));
+ break;
+ case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
+ input_report_rel(dev, REL_HWHEEL,
+ -sign_extend32(packet[3], 5));
+ break;
+ case 0x00:
+ case 0xC0:
+ wheel = sign_extend32(packet[3], 3);
+
+ /*
+ * Some A4Tech mice have two scroll wheels, with first
+ * one reporting +/-1 in the lower nibble, and second
+ * one reporting +/-2.
+ */
+ if (psmouse_a4tech_2wheels && abs(wheel) > 1)
+ input_report_rel(dev, REL_HWHEEL, wheel / 2);
+ else
+ input_report_rel(dev, REL_WHEEL, -wheel);
+
+ input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
+ input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
+ break;
+ }
+ break;
+
+ case PSMOUSE_GENPS:
+ /* Report scroll buttons on NetMice */
+ input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
+
+ /* Extra buttons on Genius NewNet 3D */
+ input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
+ input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
+ break;
+
+ case PSMOUSE_THINKPS:
+ /* Extra button on ThinkingMouse */
+ input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
+
+ /*
+ * Without this bit of weirdness moving up gives wildly
+ * high Y changes.
+ */
+ packet[1] |= (packet[0] & 0x40) << 1;
+ break;
+
+ case PSMOUSE_CORTRON:
+ /*
+ * Cortron PS2 Trackball reports SIDE button in the
+ * 4th bit of the first byte.
+ */
+ input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
+ packet[0] |= BIT(3);
+ break;
+
+ default:
+ break;
+ }
+
+ /* Generic PS/2 Mouse */
+ packet[0] |= psmouse->extra_buttons;
+ psmouse_report_standard_packet(dev, packet);
+
+ input_sync(dev);
+
+ return PSMOUSE_FULL_PACKET;
+}
+
+void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
+ unsigned long delay)
+{
+ queue_delayed_work(kpsmoused_wq, work, delay);
+}
+
+/*
+ * __psmouse_set_state() sets new psmouse state and resets all flags.
+ */
+static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
+{
+ psmouse->state = new_state;
+ psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
+ psmouse->ps2dev.flags = 0;
+ psmouse->last = jiffies;
+}
+
+/*
+ * psmouse_set_state() sets new psmouse state and resets all flags and
+ * counters while holding serio lock so fighting with interrupt handler
+ * is not a concern.
+ */
+void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
+{
+ serio_pause_rx(psmouse->ps2dev.serio);
+ __psmouse_set_state(psmouse, new_state);
+ serio_continue_rx(psmouse->ps2dev.serio);
+}
+
+/*
+ * psmouse_handle_byte() processes one byte of the input data stream
+ * by calling corresponding protocol handler.
+ */
+static int psmouse_handle_byte(struct psmouse *psmouse)
+{
+ psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
+
+ switch (rc) {
+ case PSMOUSE_BAD_DATA:
+ if (psmouse->state == PSMOUSE_ACTIVATED) {
+ psmouse_warn(psmouse,
+ "%s at %s lost sync at byte %d\n",
+ psmouse->name, psmouse->phys,
+ psmouse->pktcnt);
+ if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
+ __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ psmouse_notice(psmouse,
+ "issuing reconnect request\n");
+ serio_reconnect(psmouse->ps2dev.serio);
+ return -EIO;
+ }
+ }
+ psmouse->pktcnt = 0;
+ break;
+
+ case PSMOUSE_FULL_PACKET:
+ psmouse->pktcnt = 0;
+ if (psmouse->out_of_sync_cnt) {
+ psmouse->out_of_sync_cnt = 0;
+ psmouse_notice(psmouse,
+ "%s at %s - driver resynced.\n",
+ psmouse->name, psmouse->phys);
+ }
+ break;
+
+ case PSMOUSE_GOOD_DATA:
+ break;
+ }
+ return 0;
+}
+
+static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
+{
+ switch (psmouse->oob_data_type) {
+ case PSMOUSE_OOB_NONE:
+ psmouse->oob_data_type = data;
+ break;
+
+ case PSMOUSE_OOB_EXTRA_BTNS:
+ psmouse_report_standard_buttons(psmouse->dev, data);
+ input_sync(psmouse->dev);
+
+ psmouse->extra_buttons = data;
+ psmouse->oob_data_type = PSMOUSE_OOB_NONE;
+ break;
+
+ default:
+ psmouse_warn(psmouse,
+ "unknown OOB_DATA type: 0x%02x\n",
+ psmouse->oob_data_type);
+ psmouse->oob_data_type = PSMOUSE_OOB_NONE;
+ break;
+ }
+}
+
+/*
+ * psmouse_interrupt() handles incoming characters, either passing them
+ * for normal processing or gathering them as command response.
+ */
+static irqreturn_t psmouse_interrupt(struct serio *serio,
+ u8 data, unsigned int flags)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+
+ if (psmouse->state == PSMOUSE_IGNORE)
+ goto out;
+
+ if (unlikely((flags & SERIO_TIMEOUT) ||
+ ((flags & SERIO_PARITY) &&
+ !psmouse->protocol->ignore_parity))) {
+
+ if (psmouse->state == PSMOUSE_ACTIVATED)
+ psmouse_warn(psmouse,
+ "bad data from KBC -%s%s\n",
+ flags & SERIO_TIMEOUT ? " timeout" : "",
+ flags & SERIO_PARITY ? " bad parity" : "");
+ ps2_cmd_aborted(&psmouse->ps2dev);
+ goto out;
+ }
+
+ if (flags & SERIO_OOB_DATA) {
+ psmouse_handle_oob_data(psmouse, data);
+ goto out;
+ }
+
+ if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
+ if (ps2_handle_ack(&psmouse->ps2dev, data))
+ goto out;
+
+ if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
+ if (ps2_handle_response(&psmouse->ps2dev, data))
+ goto out;
+
+ if (psmouse->state <= PSMOUSE_RESYNCING)
+ goto out;
+
+ if (psmouse->state == PSMOUSE_ACTIVATED &&
+ psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
+ psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
+ psmouse->name, psmouse->phys, psmouse->pktcnt);
+ psmouse->badbyte = psmouse->packet[0];
+ __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
+ goto out;
+ }
+
+ psmouse->packet[psmouse->pktcnt++] = data;
+
+ /* Check if this is a new device announcement (0xAA 0x00) */
+ if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
+ if (psmouse->pktcnt == 1) {
+ psmouse->last = jiffies;
+ goto out;
+ }
+
+ if (psmouse->packet[1] == PSMOUSE_RET_ID ||
+ (psmouse->protocol->type == PSMOUSE_HGPK &&
+ psmouse->packet[1] == PSMOUSE_RET_BAT)) {
+ __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ serio_reconnect(serio);
+ goto out;
+ }
+
+ /* Not a new device, try processing first byte normally */
+ psmouse->pktcnt = 1;
+ if (psmouse_handle_byte(psmouse))
+ goto out;
+
+ psmouse->packet[psmouse->pktcnt++] = data;
+ }
+
+ /*
+ * See if we need to force resync because mouse was idle for
+ * too long.
+ */
+ if (psmouse->state == PSMOUSE_ACTIVATED &&
+ psmouse->pktcnt == 1 && psmouse->resync_time &&
+ time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
+ psmouse->badbyte = psmouse->packet[0];
+ __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
+ goto out;
+ }
+
+ psmouse->last = jiffies;
+ psmouse_handle_byte(psmouse);
+
+ out:
+ return IRQ_HANDLED;
+}
+
+/*
+ * psmouse_reset() resets the mouse into power-on state.
+ */
+int psmouse_reset(struct psmouse *psmouse)
+{
+ u8 param[2];
+ int error;
+
+ error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
+ if (error)
+ return error;
+
+ if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
+ return -EIO;
+
+ return 0;
+}
+
+/*
+ * Here we set the mouse resolution.
+ */
+void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
+{
+ static const u8 params[] = { 0, 1, 2, 2, 3 };
+ u8 p;
+
+ if (resolution == 0 || resolution > 200)
+ resolution = 200;
+
+ p = params[resolution / 50];
+ ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
+ psmouse->resolution = 25 << p;
+}
+
+/*
+ * Here we set the mouse report rate.
+ */
+static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
+{
+ static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
+ u8 r;
+ int i = 0;
+
+ while (rates[i] > rate)
+ i++;
+ r = rates[i];
+ ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
+ psmouse->rate = r;
+}
+
+/*
+ * Here we set the mouse scaling.
+ */
+static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
+{
+ ps2_command(&psmouse->ps2dev, NULL,
+ scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
+ PSMOUSE_CMD_SETSCALE11);
+}
+
+/*
+ * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
+ */
+static int psmouse_poll(struct psmouse *psmouse)
+{
+ return ps2_command(&psmouse->ps2dev, psmouse->packet,
+ PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
+}
+
+static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
+{
+ int i;
+
+ for (i = 0; ids[i]; i++)
+ if (!strcasecmp(id, ids[i]))
+ return true;
+
+ return false;
+}
+
+/*
+ * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
+ */
+bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
+{
+ struct serio *serio = psmouse->ps2dev.serio;
+ char *p, *fw_id_copy, *save_ptr;
+ bool found = false;
+
+ if (strncmp(serio->firmware_id, "PNP: ", 5))
+ return false;
+
+ fw_id_copy = kstrndup(&serio->firmware_id[5],
+ sizeof(serio->firmware_id) - 5,
+ GFP_KERNEL);
+ if (!fw_id_copy)
+ return false;
+
+ save_ptr = fw_id_copy;
+ while ((p = strsep(&fw_id_copy, " ")) != NULL) {
+ if (psmouse_check_pnp_id(p, ids)) {
+ found = true;
+ break;
+ }
+ }
+
+ kfree(save_ptr);
+ return found;
+}
+
+/*
+ * Genius NetMouse magic init.
+ */
+static int genius_detect(struct psmouse *psmouse, bool set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[4];
+
+ param[0] = 3;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
+ ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
+
+ if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
+ return -ENODEV;
+
+ if (set_properties) {
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ __set_bit(BTN_EXTRA, psmouse->dev->keybit);
+ __set_bit(BTN_SIDE, psmouse->dev->keybit);
+ __set_bit(REL_WHEEL, psmouse->dev->relbit);
+
+ psmouse->vendor = "Genius";
+ psmouse->name = "Mouse";
+ psmouse->pktsize = 4;
+ }
+
+ return 0;
+}
+
+/*
+ * IntelliMouse magic init.
+ */
+static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[2];
+
+ param[0] = 200;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 100;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 80;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+
+ if (param[0] != 3)
+ return -ENODEV;
+
+ if (set_properties) {
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ __set_bit(REL_WHEEL, psmouse->dev->relbit);
+
+ if (!psmouse->vendor)
+ psmouse->vendor = "Generic";
+ if (!psmouse->name)
+ psmouse->name = "Wheel Mouse";
+ psmouse->pktsize = 4;
+ }
+
+ return 0;
+}
+
+/*
+ * Try IntelliMouse/Explorer magic init.
+ */
+static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[2];
+
+ intellimouse_detect(psmouse, 0);
+
+ param[0] = 200;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 200;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 80;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+
+ if (param[0] != 4)
+ return -ENODEV;
+
+ /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
+ param[0] = 200;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 80;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 40;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+
+ if (set_properties) {
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ __set_bit(REL_WHEEL, psmouse->dev->relbit);
+ __set_bit(REL_HWHEEL, psmouse->dev->relbit);
+ __set_bit(BTN_SIDE, psmouse->dev->keybit);
+ __set_bit(BTN_EXTRA, psmouse->dev->keybit);
+
+ if (!psmouse->vendor)
+ psmouse->vendor = "Generic";
+ if (!psmouse->name)
+ psmouse->name = "Explorer Mouse";
+ psmouse->pktsize = 4;
+ }
+
+ return 0;
+}
+
+/*
+ * Kensington ThinkingMouse / ExpertMouse magic init.
+ */
+static int thinking_detect(struct psmouse *psmouse, bool set_properties)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[2];
+ static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
+ int i;
+
+ param[0] = 10;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ param[0] = 0;
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
+ for (i = 0; i < ARRAY_SIZE(seq); i++) {
+ param[0] = seq[i];
+ ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
+ }
+ ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+
+ if (param[0] != 2)
+ return -ENODEV;
+
+ if (set_properties) {
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ __set_bit(BTN_EXTRA, psmouse->dev->keybit);
+
+ psmouse->vendor = "Kensington";
+ psmouse->name = "ThinkingMouse";
+ }
+
+ return 0;
+}
+
+/*
+ * Bare PS/2 protocol "detection". Always succeeds.
+ */
+static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
+{
+ if (set_properties) {
+ if (!psmouse->vendor)
+ psmouse->vendor = "Generic";
+ if (!psmouse->name)
+ psmouse->name = "Mouse";
+
+ /*
+ * We have no way of figuring true number of buttons so let's
+ * assume that the device has 3.
+ */
+ input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
+ }
+
+ return 0;
+}
+
+/*
+ * Cortron PS/2 protocol detection. There's no special way to detect it, so it
+ * must be forced by sysfs protocol writing.
+ */
+static int cortron_detect(struct psmouse *psmouse, bool set_properties)
+{
+ if (set_properties) {
+ psmouse->vendor = "Cortron";
+ psmouse->name = "PS/2 Trackball";
+
+ __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ __set_bit(BTN_SIDE, psmouse->dev->keybit);
+ }
+
+ return 0;
+}
+
+static const struct psmouse_protocol psmouse_protocols[] = {
+ {
+ .type = PSMOUSE_PS2,
+ .name = "PS/2",
+ .alias = "bare",
+ .maxproto = true,
+ .ignore_parity = true,
+ .detect = ps2bare_detect,
+ .try_passthru = true,
+ },
+#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
+ {
+ .type = PSMOUSE_PS2PP,
+ .name = "PS2++",
+ .alias = "logitech",
+ .detect = ps2pp_detect,
+ },
+#endif
+ {
+ .type = PSMOUSE_THINKPS,
+ .name = "ThinkPS/2",
+ .alias = "thinkps",
+ .detect = thinking_detect,
+ },
+#ifdef CONFIG_MOUSE_PS2_CYPRESS
+ {
+ .type = PSMOUSE_CYPRESS,
+ .name = "CyPS/2",
+ .alias = "cypress",
+ .detect = cypress_detect,
+ .init = cypress_init,
+ },
+#endif
+ {
+ .type = PSMOUSE_GENPS,
+ .name = "GenPS/2",
+ .alias = "genius",
+ .detect = genius_detect,
+ },
+ {
+ .type = PSMOUSE_IMPS,
+ .name = "ImPS/2",
+ .alias = "imps",
+ .maxproto = true,
+ .ignore_parity = true,
+ .detect = intellimouse_detect,
+ .try_passthru = true,
+ },
+ {
+ .type = PSMOUSE_IMEX,
+ .name = "ImExPS/2",
+ .alias = "exps",
+ .maxproto = true,
+ .ignore_parity = true,
+ .detect = im_explorer_detect,
+ .try_passthru = true,
+ },
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS
+ {
+ .type = PSMOUSE_SYNAPTICS,
+ .name = "SynPS/2",
+ .alias = "synaptics",
+ .detect = synaptics_detect,
+ .init = synaptics_init_absolute,
+ },
+ {
+ .type = PSMOUSE_SYNAPTICS_RELATIVE,
+ .name = "SynRelPS/2",
+ .alias = "synaptics-relative",
+ .detect = synaptics_detect,
+ .init = synaptics_init_relative,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
+ {
+ .type = PSMOUSE_SYNAPTICS_SMBUS,
+ .name = "SynSMBus",
+ .alias = "synaptics-smbus",
+ .detect = synaptics_detect,
+ .init = synaptics_init_smbus,
+ .smbus_companion = true,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_ALPS
+ {
+ .type = PSMOUSE_ALPS,
+ .name = "AlpsPS/2",
+ .alias = "alps",
+ .detect = alps_detect,
+ .init = alps_init,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_LIFEBOOK
+ {
+ .type = PSMOUSE_LIFEBOOK,
+ .name = "LBPS/2",
+ .alias = "lifebook",
+ .detect = lifebook_detect,
+ .init = lifebook_init,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_TRACKPOINT
+ {
+ .type = PSMOUSE_TRACKPOINT,
+ .name = "TPPS/2",
+ .alias = "trackpoint",
+ .detect = trackpoint_detect,
+ .try_passthru = true,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_TOUCHKIT
+ {
+ .type = PSMOUSE_TOUCHKIT_PS2,
+ .name = "touchkitPS/2",
+ .alias = "touchkit",
+ .detect = touchkit_ps2_detect,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_OLPC
+ {
+ .type = PSMOUSE_HGPK,
+ .name = "OLPC HGPK",
+ .alias = "hgpk",
+ .detect = hgpk_detect,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_ELANTECH
+ {
+ .type = PSMOUSE_ELANTECH,
+ .name = "ETPS/2",
+ .alias = "elantech",
+ .detect = elantech_detect,
+ .init = elantech_init_ps2,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
+ {
+ .type = PSMOUSE_ELANTECH_SMBUS,
+ .name = "ETSMBus",
+ .alias = "elantech-smbus",
+ .detect = elantech_detect,
+ .init = elantech_init_smbus,
+ .smbus_companion = true,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_SENTELIC
+ {
+ .type = PSMOUSE_FSP,
+ .name = "FSPPS/2",
+ .alias = "fsp",
+ .detect = fsp_detect,
+ .init = fsp_init,
+ },
+#endif
+ {
+ .type = PSMOUSE_CORTRON,
+ .name = "CortronPS/2",
+ .alias = "cortps",
+ .detect = cortron_detect,
+ },
+#ifdef CONFIG_MOUSE_PS2_FOCALTECH
+ {
+ .type = PSMOUSE_FOCALTECH,
+ .name = "FocalTechPS/2",
+ .alias = "focaltech",
+ .detect = focaltech_detect,
+ .init = focaltech_init,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_VMMOUSE
+ {
+ .type = PSMOUSE_VMMOUSE,
+ .name = VMMOUSE_PSNAME,
+ .alias = "vmmouse",
+ .detect = vmmouse_detect,
+ .init = vmmouse_init,
+ },
+#endif
+#ifdef CONFIG_MOUSE_PS2_BYD
+ {
+ .type = PSMOUSE_BYD,
+ .name = "BYDPS/2",
+ .alias = "byd",
+ .detect = byd_detect,
+ .init = byd_init,
+ },
+#endif
+ {
+ .type = PSMOUSE_AUTO,
+ .name = "auto",
+ .alias = "any",
+ .maxproto = true,
+ },
+};
+
+static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
+ if (psmouse_protocols[i].type == type)
+ return &psmouse_protocols[i];
+
+ return NULL;
+}
+
+static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
+{
+ const struct psmouse_protocol *proto;
+
+ proto = __psmouse_protocol_by_type(type);
+ if (proto)
+ return proto;
+
+ WARN_ON(1);
+ return &psmouse_protocols[0];
+}
+
+static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
+{
+ const struct psmouse_protocol *p;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
+ p = &psmouse_protocols[i];
+
+ if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
+ (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
+ return &psmouse_protocols[i];
+ }
+
+ return NULL;
+}
+
+/*
+ * Apply default settings to the psmouse structure. Most of them will
+ * be overridden by individual protocol initialization routines.
+ */
+static void psmouse_apply_defaults(struct psmouse *psmouse)
+{
+ struct input_dev *input_dev = psmouse->dev;
+
+ bitmap_zero(input_dev->evbit, EV_CNT);
+ bitmap_zero(input_dev->keybit, KEY_CNT);
+ bitmap_zero(input_dev->relbit, REL_CNT);
+ bitmap_zero(input_dev->absbit, ABS_CNT);
+ bitmap_zero(input_dev->mscbit, MSC_CNT);
+
+ input_set_capability(input_dev, EV_KEY, BTN_LEFT);
+ input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
+
+ input_set_capability(input_dev, EV_REL, REL_X);
+ input_set_capability(input_dev, EV_REL, REL_Y);
+
+ __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+
+ psmouse->protocol = &psmouse_protocols[0];
+
+ psmouse->set_rate = psmouse_set_rate;
+ psmouse->set_resolution = psmouse_set_resolution;
+ psmouse->set_scale = psmouse_set_scale;
+ psmouse->poll = psmouse_poll;
+ psmouse->protocol_handler = psmouse_process_byte;
+ psmouse->pktsize = 3;
+ psmouse->reconnect = NULL;
+ psmouse->fast_reconnect = NULL;
+ psmouse->disconnect = NULL;
+ psmouse->cleanup = NULL;
+ psmouse->pt_activate = NULL;
+ psmouse->pt_deactivate = NULL;
+}
+
+static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
+ struct psmouse *psmouse, bool allow_passthrough,
+ bool set_properties)
+{
+ if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
+ !allow_passthrough) {
+ return false;
+ }
+
+ if (set_properties)
+ psmouse_apply_defaults(psmouse);
+
+ return detect(psmouse, set_properties) == 0;
+}
+
+static bool psmouse_try_protocol(struct psmouse *psmouse,
+ enum psmouse_type type,
+ unsigned int *max_proto,
+ bool set_properties, bool init_allowed)
+{
+ const struct psmouse_protocol *proto;
+
+ proto = __psmouse_protocol_by_type(type);
+ if (!proto)
+ return false;
+
+ if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
+ set_properties))
+ return false;
+
+ if (set_properties && proto->init && init_allowed) {
+ if (proto->init(psmouse) != 0) {
+ /*
+ * We detected device, but init failed. Adjust
+ * max_proto so we only try standard protocols.
+ */
+ if (*max_proto > PSMOUSE_IMEX)
+ *max_proto = PSMOUSE_IMEX;
+
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/*
+ * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
+ * the mouse may have.
+ */
+static int psmouse_extensions(struct psmouse *psmouse,
+ unsigned int max_proto, bool set_properties)
+{
+ bool synaptics_hardware = false;
+ int ret;
+
+ /*
+ * Always check for focaltech, this is safe as it uses pnp-id
+ * matching.
+ */
+ if (psmouse_do_detect(focaltech_detect,
+ psmouse, false, set_properties)) {
+ if (max_proto > PSMOUSE_IMEX &&
+ IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
+ (!set_properties || focaltech_init(psmouse) == 0)) {
+ return PSMOUSE_FOCALTECH;
+ }
+ /*
+ * Restrict psmouse_max_proto so that psmouse_initialize()
+ * does not try to reset rate and resolution, because even
+ * that upsets the device.
+ * This also causes us to basically fall through to basic
+ * protocol detection, where we fully reset the mouse,
+ * and set it up as bare PS/2 protocol device.
+ */
+ psmouse_max_proto = max_proto = PSMOUSE_PS2;
+ }
+
+ /*
+ * We always check for LifeBook because it does not disturb mouse
+ * (it only checks DMI information).
+ */
+ if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
+ set_properties, max_proto > PSMOUSE_IMEX))
+ return PSMOUSE_LIFEBOOK;
+
+ if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
+ set_properties, max_proto > PSMOUSE_IMEX))
+ return PSMOUSE_VMMOUSE;
+
+ /*
+ * Try Kensington ThinkingMouse (we try first, because Synaptics
+ * probe upsets the ThinkingMouse).
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
+ set_properties, true)) {
+ return PSMOUSE_THINKPS;
+ }
+
+ /*
+ * Try Synaptics TouchPad. Note that probing is done even if
+ * Synaptics protocol support is disabled in config - we need to
+ * know if it is Synaptics so we can reset it properly after
+ * probing for IntelliMouse.
+ */
+ if (max_proto > PSMOUSE_PS2 &&
+ psmouse_do_detect(synaptics_detect,
+ psmouse, false, set_properties)) {
+ synaptics_hardware = true;
+
+ if (max_proto > PSMOUSE_IMEX) {
+ /*
+ * Try activating protocol, but check if support is
+ * enabled first, since we try detecting Synaptics
+ * even when protocol is disabled.
+ */
+ if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
+ IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
+ if (!set_properties)
+ return PSMOUSE_SYNAPTICS;
+
+ ret = synaptics_init(psmouse);
+ if (ret >= 0)
+ return ret;
+ }
+
+ /*
+ * Some Synaptics touchpads can emulate extended
+ * protocols (like IMPS/2). Unfortunately
+ * Logitech/Genius probes confuse some firmware
+ * versions so we'll have to skip them.
+ */
+ max_proto = PSMOUSE_IMEX;
+ }
+
+ /*
+ * Make sure that touchpad is in relative mode, gestures
+ * (taps) are enabled.
+ */
+ synaptics_reset(psmouse);
+ }
+
+ /*
+ * Try Cypress Trackpad. We must try it before Finger Sensing Pad
+ * because Finger Sensing Pad probe upsets some modules of Cypress
+ * Trackpads.
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
+ set_properties, true)) {
+ return PSMOUSE_CYPRESS;
+ }
+
+ /* Try ALPS TouchPad */
+ if (max_proto > PSMOUSE_IMEX) {
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+ if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
+ &max_proto, set_properties, true))
+ return PSMOUSE_ALPS;
+ }
+
+ /* Try OLPC HGPK touchpad */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
+ set_properties, true)) {
+ return PSMOUSE_HGPK;
+ }
+
+ /* Try Elantech touchpad */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
+ &max_proto, set_properties, false)) {
+ if (!set_properties)
+ return PSMOUSE_ELANTECH;
+
+ ret = elantech_init(psmouse);
+ if (ret >= 0)
+ return ret;
+ }
+
+ if (max_proto > PSMOUSE_IMEX) {
+ if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
+ &max_proto, set_properties, true))
+ return PSMOUSE_GENPS;
+
+ if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
+ &max_proto, set_properties, true))
+ return PSMOUSE_PS2PP;
+
+ if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
+ &max_proto, set_properties, true))
+ return PSMOUSE_TRACKPOINT;
+
+ if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
+ &max_proto, set_properties, true))
+ return PSMOUSE_TOUCHKIT_PS2;
+ }
+
+ /*
+ * Try Finger Sensing Pad. We do it here because its probe upsets
+ * Trackpoint devices (causing TP_READ_ID command to time out).
+ */
+ if (max_proto > PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_FSP,
+ &max_proto, set_properties, true)) {
+ return PSMOUSE_FSP;
+ }
+
+ /*
+ * Reset to defaults in case the device got confused by extended
+ * protocol probes. Note that we follow up with full reset because
+ * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
+ */
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+ psmouse_reset(psmouse);
+
+ if (max_proto >= PSMOUSE_IMEX &&
+ psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
+ &max_proto, set_properties, true)) {
+ return PSMOUSE_IMEX;
+ }
+
+ if (max_proto >= PSMOUSE_IMPS &&
+ psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
+ &max_proto, set_properties, true)) {
+ return PSMOUSE_IMPS;
+ }
+
+ /*
+ * Okay, all failed, we have a standard mouse here. The number of
+ * the buttons is still a question, though. We assume 3.
+ */
+ psmouse_try_protocol(psmouse, PSMOUSE_PS2,
+ &max_proto, set_properties, true);
+
+ if (synaptics_hardware) {
+ /*
+ * We detected Synaptics hardware but it did not respond to
+ * IMPS/2 probes. We need to reset the touchpad because if
+ * there is a track point on the pass through port it could
+ * get disabled while probing for protocol extensions.
+ */
+ psmouse_reset(psmouse);
+ }
+
+ return PSMOUSE_PS2;
+}
+
+/*
+ * psmouse_probe() probes for a PS/2 mouse.
+ */
+static int psmouse_probe(struct psmouse *psmouse)
+{
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ u8 param[2];
+ int error;
+
+ /*
+ * First, we check if it's a mouse. It should send 0x00 or 0x03 in
+ * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
+ * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
+ * subsequent ID queries, probably due to a firmware bug.
+ */
+ param[0] = 0xa5;
+ error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
+ if (error)
+ return error;
+
+ if (param[0] != 0x00 && param[0] != 0x03 &&
+ param[0] != 0x04 && param[0] != 0xff)
+ return -ENODEV;
+
+ /*
+ * Then we reset and disable the mouse so that it doesn't generate
+ * events.
+ */
+ error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+ if (error)
+ psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
+ ps2dev->serio->phys, error);
+
+ return 0;
+}
+
+/*
+ * psmouse_initialize() initializes the mouse to a sane state.
+ */
+static void psmouse_initialize(struct psmouse *psmouse)
+{
+ /*
+ * We set the mouse report rate, resolution and scaling.
+ */
+ if (psmouse_max_proto != PSMOUSE_PS2) {
+ psmouse->set_rate(psmouse, psmouse->rate);
+ psmouse->set_resolution(psmouse, psmouse->resolution);
+ psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
+ }
+}
+
+/*
+ * psmouse_activate() enables the mouse so that we get motion reports from it.
+ */
+int psmouse_activate(struct psmouse *psmouse)
+{
+ if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
+ psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+ return -1;
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
+ return 0;
+}
+
+/*
+ * psmouse_deactivate() puts the mouse into poll mode so that we don't get
+ * motion reports from it unless we explicitly request it.
+ */
+int psmouse_deactivate(struct psmouse *psmouse)
+{
+ int error;
+
+ error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
+ if (error) {
+ psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
+ psmouse->ps2dev.serio->phys, error);
+ return error;
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ return 0;
+}
+
+/*
+ * psmouse_resync() attempts to re-validate current protocol.
+ */
+static void psmouse_resync(struct work_struct *work)
+{
+ struct psmouse *parent = NULL, *psmouse =
+ container_of(work, struct psmouse, resync_work.work);
+ struct serio *serio = psmouse->ps2dev.serio;
+ psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
+ bool failed = false, enabled = false;
+ int i;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (psmouse->state != PSMOUSE_RESYNCING)
+ goto out;
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ /*
+ * Some mice don't ACK commands sent while they are in the middle of
+ * transmitting motion packet. To avoid delay we use ps2_sendbyte()
+ * instead of ps2_command() which would wait for 200ms for an ACK
+ * that may never come.
+ * As an additional quirk ALPS touchpads may not only forget to ACK
+ * disable command but will stop reporting taps, so if we see that
+ * mouse at least once ACKs disable we will do full reconnect if ACK
+ * is missing.
+ */
+ psmouse->num_resyncs++;
+
+ if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
+ if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
+ failed = true;
+ } else
+ psmouse->acks_disable_command = true;
+
+ /*
+ * Poll the mouse. If it was reset the packet will be shorter than
+ * psmouse->pktsize and ps2_command will fail. We do not expect and
+ * do not handle scenario when mouse "upgrades" its protocol while
+ * disconnected since it would require additional delay. If we ever
+ * see a mouse that does it we'll adjust the code.
+ */
+ if (!failed) {
+ if (psmouse->poll(psmouse))
+ failed = true;
+ else {
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ for (i = 0; i < psmouse->pktsize; i++) {
+ psmouse->pktcnt++;
+ rc = psmouse->protocol_handler(psmouse);
+ if (rc != PSMOUSE_GOOD_DATA)
+ break;
+ }
+ if (rc != PSMOUSE_FULL_PACKET)
+ failed = true;
+ psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
+ }
+ }
+
+ /*
+ * Now try to enable mouse. We try to do that even if poll failed
+ * and also repeat our attempts 5 times, otherwise we may be left
+ * out with disabled mouse.
+ */
+ for (i = 0; i < 5; i++) {
+ if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
+ enabled = true;
+ break;
+ }
+ msleep(200);
+ }
+
+ if (!enabled) {
+ psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+ failed = true;
+ }
+
+ if (failed) {
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ psmouse_info(psmouse,
+ "resync failed, issuing reconnect request\n");
+ serio_reconnect(serio);
+ } else
+ psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
+
+ if (parent)
+ psmouse_activate(parent);
+ out:
+ mutex_unlock(&psmouse_mutex);
+}
+
+/*
+ * psmouse_cleanup() resets the mouse into power-on state.
+ */
+static void psmouse_cleanup(struct serio *serio)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+ struct psmouse *parent = NULL;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ /*
+ * Disable stream mode so cleanup routine can proceed undisturbed.
+ */
+ if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
+ psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
+ psmouse->ps2dev.serio->phys);
+
+ if (psmouse->cleanup)
+ psmouse->cleanup(psmouse);
+
+ /*
+ * Reset the mouse to defaults (bare PS/2 protocol).
+ */
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
+
+ /*
+ * Some boxes, such as HP nx7400, get terribly confused if mouse
+ * is not fully enabled before suspending/shutting down.
+ */
+ ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
+
+ if (parent) {
+ if (parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+
+ psmouse_activate(parent);
+ }
+
+ mutex_unlock(&psmouse_mutex);
+}
+
+/*
+ * psmouse_disconnect() closes and frees.
+ */
+static void psmouse_disconnect(struct serio *serio)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+ struct psmouse *parent = NULL;
+
+ sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
+
+ mutex_lock(&psmouse_mutex);
+
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+
+ /* make sure we don't have a resync in progress */
+ mutex_unlock(&psmouse_mutex);
+ flush_workqueue(kpsmoused_wq);
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+
+ if (parent && parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+
+ serio_close(serio);
+ serio_set_drvdata(serio, NULL);
+
+ if (psmouse->dev)
+ input_unregister_device(psmouse->dev);
+
+ kfree(psmouse);
+
+ if (parent)
+ psmouse_activate(parent);
+
+ mutex_unlock(&psmouse_mutex);
+}
+
+static int psmouse_switch_protocol(struct psmouse *psmouse,
+ const struct psmouse_protocol *proto)
+{
+ const struct psmouse_protocol *selected_proto;
+ struct input_dev *input_dev = psmouse->dev;
+ enum psmouse_type type;
+
+ input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
+
+ if (proto && (proto->detect || proto->init)) {
+ psmouse_apply_defaults(psmouse);
+
+ if (proto->detect && proto->detect(psmouse, true) < 0)
+ return -1;
+
+ if (proto->init && proto->init(psmouse) < 0)
+ return -1;
+
+ selected_proto = proto;
+ } else {
+ type = psmouse_extensions(psmouse, psmouse_max_proto, true);
+ selected_proto = psmouse_protocol_by_type(type);
+ }
+
+ psmouse->protocol = selected_proto;
+
+ /*
+ * If mouse's packet size is 3 there is no point in polling the
+ * device in hopes to detect protocol reset - we won't get less
+ * than 3 bytes response anyhow.
+ */
+ if (psmouse->pktsize == 3)
+ psmouse->resync_time = 0;
+
+ /*
+ * Some smart KVMs fake response to POLL command returning just
+ * 3 bytes and messing up our resync logic, so if initial poll
+ * fails we won't try polling the device anymore. Hopefully
+ * such KVM will maintain initially selected protocol.
+ */
+ if (psmouse->resync_time && psmouse->poll(psmouse))
+ psmouse->resync_time = 0;
+
+ snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
+ selected_proto->name, psmouse->vendor, psmouse->name);
+
+ input_dev->name = psmouse->devname;
+ input_dev->phys = psmouse->phys;
+ input_dev->id.bustype = BUS_I8042;
+ input_dev->id.vendor = 0x0002;
+ input_dev->id.product = psmouse->protocol->type;
+ input_dev->id.version = psmouse->model;
+
+ return 0;
+}
+
+/*
+ * psmouse_connect() is a callback from the serio module when
+ * an unhandled serio port is found.
+ */
+static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
+{
+ struct psmouse *psmouse, *parent = NULL;
+ struct input_dev *input_dev;
+ int retval = 0, error = -ENOMEM;
+
+ mutex_lock(&psmouse_mutex);
+
+ /*
+ * If this is a pass-through port deactivate parent so the device
+ * connected to this port can be successfully identified
+ */
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!psmouse || !input_dev)
+ goto err_free;
+
+ ps2_init(&psmouse->ps2dev, serio);
+ INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
+ psmouse->dev = input_dev;
+ snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ serio_set_drvdata(serio, psmouse);
+
+ error = serio_open(serio, drv);
+ if (error)
+ goto err_clear_drvdata;
+
+ /* give PT device some time to settle down before probing */
+ if (serio->id.type == SERIO_PS_PSTHRU)
+ usleep_range(10000, 15000);
+
+ if (psmouse_probe(psmouse) < 0) {
+ error = -ENODEV;
+ goto err_close_serio;
+ }
+
+ psmouse->rate = psmouse_rate;
+ psmouse->resolution = psmouse_resolution;
+ psmouse->resetafter = psmouse_resetafter;
+ psmouse->resync_time = parent ? 0 : psmouse_resync_time;
+ psmouse->smartscroll = psmouse_smartscroll;
+
+ psmouse_switch_protocol(psmouse, NULL);
+
+ if (!psmouse->protocol->smbus_companion) {
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ psmouse_initialize(psmouse);
+
+ error = input_register_device(input_dev);
+ if (error)
+ goto err_protocol_disconnect;
+ } else {
+ /* Smbus companion will be reporting events, not us. */
+ input_free_device(input_dev);
+ psmouse->dev = input_dev = NULL;
+ }
+
+ if (parent && parent->pt_activate)
+ parent->pt_activate(parent);
+
+ error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
+ if (error)
+ goto err_pt_deactivate;
+
+ /*
+ * PS/2 devices having SMBus companions should stay disabled
+ * on PS/2 side, in order to have SMBus part operable.
+ */
+ if (!psmouse->protocol->smbus_companion)
+ psmouse_activate(psmouse);
+
+ out:
+ /* If this is a pass-through port the parent needs to be re-activated */
+ if (parent)
+ psmouse_activate(parent);
+
+ mutex_unlock(&psmouse_mutex);
+ return retval;
+
+ err_pt_deactivate:
+ if (parent && parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+ if (input_dev) {
+ input_unregister_device(input_dev);
+ input_dev = NULL; /* so we don't try to free it below */
+ }
+ err_protocol_disconnect:
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ err_close_serio:
+ serio_close(serio);
+ err_clear_drvdata:
+ serio_set_drvdata(serio, NULL);
+ err_free:
+ input_free_device(input_dev);
+ kfree(psmouse);
+
+ retval = error;
+ goto out;
+}
+
+static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
+{
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+ struct psmouse *parent = NULL;
+ int (*reconnect_handler)(struct psmouse *);
+ enum psmouse_type type;
+ int rc = -1;
+
+ mutex_lock(&psmouse_mutex);
+
+ if (fast_reconnect) {
+ reconnect_handler = psmouse->fast_reconnect;
+ if (!reconnect_handler) {
+ rc = -ENOENT;
+ goto out_unlock;
+ }
+ } else {
+ reconnect_handler = psmouse->reconnect;
+ }
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ if (reconnect_handler) {
+ if (reconnect_handler(psmouse))
+ goto out;
+ } else {
+ psmouse_reset(psmouse);
+
+ if (psmouse_probe(psmouse) < 0)
+ goto out;
+
+ type = psmouse_extensions(psmouse, psmouse_max_proto, false);
+ if (psmouse->protocol->type != type)
+ goto out;
+ }
+
+ /*
+ * OK, the device type (and capabilities) match the old one,
+ * we can continue using it, complete initialization
+ */
+ if (!psmouse->protocol->smbus_companion) {
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+ psmouse_initialize(psmouse);
+ }
+
+ if (parent && parent->pt_activate)
+ parent->pt_activate(parent);
+
+ /*
+ * PS/2 devices having SMBus companions should stay disabled
+ * on PS/2 side, in order to have SMBus part operable.
+ */
+ if (!psmouse->protocol->smbus_companion)
+ psmouse_activate(psmouse);
+
+ rc = 0;
+
+out:
+ /* If this is a pass-through port the parent waits to be activated */
+ if (parent)
+ psmouse_activate(parent);
+
+out_unlock:
+ mutex_unlock(&psmouse_mutex);
+ return rc;
+}
+
+static int psmouse_reconnect(struct serio *serio)
+{
+ return __psmouse_reconnect(serio, false);
+}
+
+static int psmouse_fast_reconnect(struct serio *serio)
+{
+ return __psmouse_reconnect(serio, true);
+}
+
+static struct serio_device_id psmouse_serio_ids[] = {
+ {
+ .type = SERIO_8042,
+ .proto = SERIO_ANY,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ {
+ .type = SERIO_PS_PSTHRU,
+ .proto = SERIO_ANY,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
+
+static struct serio_driver psmouse_drv = {
+ .driver = {
+ .name = "psmouse",
+ },
+ .description = DRIVER_DESC,
+ .id_table = psmouse_serio_ids,
+ .interrupt = psmouse_interrupt,
+ .connect = psmouse_connect,
+ .reconnect = psmouse_reconnect,
+ .fast_reconnect = psmouse_fast_reconnect,
+ .disconnect = psmouse_disconnect,
+ .cleanup = psmouse_cleanup,
+};
+
+ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct serio *serio = to_serio_port(dev);
+ struct psmouse_attribute *attr = to_psmouse_attr(devattr);
+ struct psmouse *psmouse = serio_get_drvdata(serio);
+
+ if (psmouse->protocol->smbus_companion &&
+ devattr != &psmouse_attr_protocol.dattr)
+ return -ENOENT;
+
+ return attr->show(psmouse, attr->data, buf);
+}
+
+ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct serio *serio = to_serio_port(dev);
+ struct psmouse_attribute *attr = to_psmouse_attr(devattr);
+ struct psmouse *psmouse, *parent = NULL;
+ int retval;
+
+ retval = mutex_lock_interruptible(&psmouse_mutex);
+ if (retval)
+ goto out;
+
+ psmouse = serio_get_drvdata(serio);
+
+ if (psmouse->protocol->smbus_companion &&
+ devattr != &psmouse_attr_protocol.dattr) {
+ retval = -ENOENT;
+ goto out_unlock;
+ }
+
+ if (attr->protect) {
+ if (psmouse->state == PSMOUSE_IGNORE) {
+ retval = -ENODEV;
+ goto out_unlock;
+ }
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ psmouse_deactivate(parent);
+ }
+
+ if (!psmouse->protocol->smbus_companion)
+ psmouse_deactivate(psmouse);
+ }
+
+ retval = attr->set(psmouse, attr->data, buf, count);
+
+ if (attr->protect) {
+ if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
+ psmouse_activate(psmouse);
+
+ if (parent)
+ psmouse_activate(parent);
+ }
+
+ out_unlock:
+ mutex_unlock(&psmouse_mutex);
+ out:
+ return retval;
+}
+
+static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
+{
+ unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
+
+ return sprintf(buf, "%u\n", *field);
+}
+
+static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
+{
+ unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
+ unsigned int value;
+ int err;
+
+ err = kstrtouint(buf, 10, &value);
+ if (err)
+ return err;
+
+ *field = value;
+
+ return count;
+}
+
+static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
+{
+ return sprintf(buf, "%s\n", psmouse->protocol->name);
+}
+
+static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+ struct serio *serio = psmouse->ps2dev.serio;
+ struct psmouse *parent = NULL;
+ struct input_dev *old_dev, *new_dev;
+ const struct psmouse_protocol *proto, *old_proto;
+ int error;
+ int retry = 0;
+
+ proto = psmouse_protocol_by_name(buf, count);
+ if (!proto)
+ return -EINVAL;
+
+ if (psmouse->protocol == proto)
+ return count;
+
+ new_dev = input_allocate_device();
+ if (!new_dev)
+ return -ENOMEM;
+
+ while (!list_empty(&serio->children)) {
+ if (++retry > 3) {
+ psmouse_warn(psmouse,
+ "failed to destroy children ports, protocol change aborted.\n");
+ input_free_device(new_dev);
+ return -EIO;
+ }
+
+ mutex_unlock(&psmouse_mutex);
+ serio_unregister_child_port(serio);
+ mutex_lock(&psmouse_mutex);
+
+ if (serio->drv != &psmouse_drv) {
+ input_free_device(new_dev);
+ return -ENODEV;
+ }
+
+ if (psmouse->protocol == proto) {
+ input_free_device(new_dev);
+ return count; /* switched by other thread */
+ }
+ }
+
+ if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+ parent = serio_get_drvdata(serio->parent);
+ if (parent->pt_deactivate)
+ parent->pt_deactivate(parent);
+ }
+
+ old_dev = psmouse->dev;
+ old_proto = psmouse->protocol;
+
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+
+ psmouse->dev = new_dev;
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+
+ if (psmouse_switch_protocol(psmouse, proto) < 0) {
+ psmouse_reset(psmouse);
+ /* default to PSMOUSE_PS2 */
+ psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
+ }
+
+ psmouse_initialize(psmouse);
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+
+ if (psmouse->protocol->smbus_companion) {
+ input_free_device(psmouse->dev);
+ psmouse->dev = NULL;
+ } else {
+ error = input_register_device(psmouse->dev);
+ if (error) {
+ if (psmouse->disconnect)
+ psmouse->disconnect(psmouse);
+
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
+ input_free_device(new_dev);
+ psmouse->dev = old_dev;
+ psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
+ psmouse_switch_protocol(psmouse, old_proto);
+ psmouse_initialize(psmouse);
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
+
+ return error;
+ }
+ }
+
+ if (old_dev)
+ input_unregister_device(old_dev);
+
+ if (parent && parent->pt_activate)
+ parent->pt_activate(parent);
+
+ return count;
+}
+
+static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+ unsigned int value;
+ int err;
+
+ err = kstrtouint(buf, 10, &value);
+ if (err)
+ return err;
+
+ psmouse->set_rate(psmouse, value);
+ return count;
+}
+
+static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
+{
+ unsigned int value;
+ int err;
+
+ err = kstrtouint(buf, 10, &value);
+ if (err)
+ return err;
+
+ psmouse->set_resolution(psmouse, value);
+ return count;
+}
+
+
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
+{
+ const struct psmouse_protocol *proto;
+
+ if (!val)
+ return -EINVAL;
+
+ proto = psmouse_protocol_by_name(val, strlen(val));
+
+ if (!proto || !proto->maxproto)
+ return -EINVAL;
+
+ *((unsigned int *)kp->arg) = proto->type;
+
+ return 0;
+}
+
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
+{
+ int type = *((unsigned int *)kp->arg);
+
+ return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
+}
+
+static int __init psmouse_init(void)
+{
+ int err;
+
+ lifebook_module_init();
+ synaptics_module_init();
+ hgpk_module_init();
+
+ err = psmouse_smbus_module_init();
+ if (err)
+ return err;
+
+ kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
+ if (!kpsmoused_wq) {
+ pr_err("failed to create kpsmoused workqueue\n");
+ err = -ENOMEM;
+ goto err_smbus_exit;
+ }
+
+ err = serio_register_driver(&psmouse_drv);
+ if (err)
+ goto err_destroy_wq;
+
+ return 0;
+
+err_destroy_wq:
+ destroy_workqueue(kpsmoused_wq);
+err_smbus_exit:
+ psmouse_smbus_module_exit();
+ return err;
+}
+
+static void __exit psmouse_exit(void)
+{
+ serio_unregister_driver(&psmouse_drv);
+ destroy_workqueue(kpsmoused_wq);
+ psmouse_smbus_module_exit();
+}
+
+module_init(psmouse_init);
+module_exit(psmouse_exit);