Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input subsystem updates from Dmitry Torokhov:
 "Mostly small fixups to PS/2 tochpad drivers (ALPS, Elantech,
  Synaptics) to better deal with specific hardware"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: elantech - update the documentation
  Input: elantech - provide a sysfs knob for crc_enabled
  Input: elantech - report the middle button of the touchpad
  Input: alps - ignore bad data on Dell Latitudes E6440 and E7440
  Input: alps - allow up to 2 invalid packets without resetting device
  Input: alps - ignore potential bare packets when device is out of sync
  Input: elantech - fix crc_enabled for Fujitsu H730
  Input: elantech - use elantech_report_trackpoint for hardware v4 too
  Input: twl4030-pwrbutton - ensure a wakeup event is recorded.
  Input: synaptics - add min/max quirk for Lenovo T440s

4 files changed, 83 insertions, 7 deletions

diff --git a/drivers/input/misc/twl4030-pwrbutton.c b/drivers/input/misc/twl4030-pwrbutton.c
index fb3b63b2f85c..8400a1a34d87 100644
--- a/drivers/input/misc/twl4030-pwrbutton.c
+++ b/drivers/input/misc/twl4030-pwrbutton.c
@@ -85,6 +85,7 @@ static int twl4030_pwrbutton_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, pwr);
+        device_init_wakeup(&pdev->dev, true);
 
         return 0;
 }
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 2b0ae8cc8e51..d125a019383f 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -1156,7 +1156,13 @@ static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
 {
         struct alps_data *priv = psmouse->private;
 
-        if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
+        /*
+         * Check if we are dealing with a bare PS/2 packet, presumably from
+         * a device connected to the external PS/2 port. Because bare PS/2
+         * protocol does not have enough constant bits to self-synchronize
+         * properly we only do this if the device is fully synchronized.
+         */
+        if (!psmouse->out_of_sync_cnt && (psmouse->packet[0] & 0xc8) == 0x08) {
                 if (psmouse->pktcnt == 3) {
                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
                                                     true);
@@ -1180,12 +1186,27 @@ static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
         }
 
         /* Bytes 2 - pktsize should have 0 in the highest bit */
-        if ((priv->proto_version < ALPS_PROTO_V5) &&
+        if (priv->proto_version < ALPS_PROTO_V5 &&
             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
                             psmouse->pktcnt - 1,
                             psmouse->packet[psmouse->pktcnt - 1]);
+
+                if (priv->proto_version == ALPS_PROTO_V3 &&
+                    psmouse->pktcnt == psmouse->pktsize) {
+                        /*
+                         * Some Dell boxes, such as Latitude E6440 or E7440
+                         * with closed lid, quite often smash last byte of
+                         * otherwise valid packet with 0xff. Given that the
+                         * next packet is very likely to be valid let's
+                         * report PSMOUSE_FULL_PACKET but not process data,
+                         * rather than reporting PSMOUSE_BAD_DATA and
+                         * filling the logs.
+                         */
+                        return PSMOUSE_FULL_PACKET;
+                }
+
                 return PSMOUSE_BAD_DATA;
         }
 
@@ -2389,6 +2410,9 @@ int alps_init(struct psmouse *psmouse)
         /* We are having trouble resyncing ALPS touchpads so disable it for now */
         psmouse->resync_time = 0;
 
+        /* Allow 2 invalid packets without resetting device */
+        psmouse->resetafter = psmouse->pktsize * 2;
+
         return 0;
 
 init_fail:
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 06fc6e76ffbe..3fcb6b3cb0bd 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -563,6 +563,7 @@ static void elantech_input_sync_v4(struct psmouse *psmouse)
         } else {
                 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
                 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
+                input_report_key(dev, BTN_MIDDLE, packet[0] & 0x04);
         }
 
         input_mt_report_pointer_emulation(dev, true);
@@ -792,6 +793,9 @@ static int elantech_packet_check_v4(struct psmouse *psmouse)
         unsigned char packet_type = packet[3] & 0x03;
         bool sanity_check;
 
+        if ((packet[3] & 0x0f) == 0x06)
+                return PACKET_TRACKPOINT;
+
         /*
          * Sanity check based on the constant bits of a packet.
          * The constant bits change depending on the value of
@@ -877,10 +881,19 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse)
 
         case 4:
                 packet_type = elantech_packet_check_v4(psmouse);
-                if (packet_type == PACKET_UNKNOWN)
+                switch (packet_type) {
+                case PACKET_UNKNOWN:
                         return PSMOUSE_BAD_DATA;
 
-                elantech_report_absolute_v4(psmouse, packet_type);
+                case PACKET_TRACKPOINT:
+                        elantech_report_trackpoint(psmouse, packet_type);
+                        break;
+
+                default:
+                        elantech_report_absolute_v4(psmouse, packet_type);
+                        break;
+                }
+
                 break;
         }
 
@@ -1120,6 +1133,22 @@ static void elantech_set_buttonpad_prop(struct psmouse *psmouse)
 }
 
 /*
+ * Some hw_version 4 models do have a middle button
+ */
+static const struct dmi_system_id elantech_dmi_has_middle_button[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+        {
+                /* Fujitsu H730 has a middle button */
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
+                },
+        },
+#endif
+        { }
+};
+
+/*
  * Set the appropriate event bits for the input subsystem
  */
 static int elantech_set_input_params(struct psmouse *psmouse)
@@ -1138,6 +1167,8 @@ static int elantech_set_input_params(struct psmouse *psmouse)
         __clear_bit(EV_REL, dev->evbit);
 
         __set_bit(BTN_LEFT, dev->keybit);
+        if (dmi_check_system(elantech_dmi_has_middle_button))
+                __set_bit(BTN_MIDDLE, dev->keybit);
         __set_bit(BTN_RIGHT, dev->keybit);
 
         __set_bit(BTN_TOUCH, dev->keybit);
@@ -1299,6 +1330,7 @@ ELANTECH_INT_ATTR(reg_25, 0x25);
 ELANTECH_INT_ATTR(reg_26, 0x26);
 ELANTECH_INT_ATTR(debug, 0);
 ELANTECH_INT_ATTR(paritycheck, 0);
+ELANTECH_INT_ATTR(crc_enabled, 0);
 
 static struct attribute *elantech_attrs[] = {
         &psmouse_attr_reg_07.dattr.attr,
@@ -1313,6 +1345,7 @@ static struct attribute *elantech_attrs[] = {
         &psmouse_attr_reg_26.dattr.attr,
         &psmouse_attr_debug.dattr.attr,
         &psmouse_attr_paritycheck.dattr.attr,
+        &psmouse_attr_crc_enabled.dattr.attr,
         NULL
 };
 
@@ -1439,6 +1472,22 @@ static int elantech_reconnect(struct psmouse *psmouse)
 }
 
 /*
+ * Some hw_version 4 models do not work with crc_disabled
+ */
+static const struct dmi_system_id elantech_dmi_force_crc_enabled[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+        {
+                /* Fujitsu H730 does not work with crc_enabled == 0 */
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "CELSIUS H730"),
+                },
+        },
+#endif
+        { }
+};
+
+/*
  * Some hw_version 3 models go into error state when we try to set
  * bit 3 and/or bit 1 of r10.
  */
@@ -1513,7 +1562,8 @@ static int elantech_set_properties(struct elantech_data *etd)
          * The signatures of v3 and v4 packets change depending on the
          * value of this hardware flag.
          */
-        etd->crc_enabled = ((etd->fw_version & 0x4000) == 0x4000);
+        etd->crc_enabled = (etd->fw_version & 0x4000) == 0x4000 ||
+                           dmi_check_system(elantech_dmi_force_crc_enabled);
 
         /* Enable real hardware resolution on hw_version 3 ? */
         etd->set_hw_resolution = !dmi_check_system(no_hw_res_dmi_table);
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 9031a0a28ea4..2a7a9174c702 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -135,8 +135,8 @@ static const struct min_max_quirk min_max_pnpid_table[] = {
                 1232, 5710, 1156, 4696
         },
         {
-                (const char * const []){"LEN0034", "LEN0036", "LEN2002",
-                                        "LEN2004", NULL},
+                (const char * const []){"LEN0034", "LEN0036", "LEN0039",
+                                        "LEN2002", "LEN2004", NULL},
                 1024, 5112, 2024, 4832
         },
         {
@@ -163,6 +163,7 @@ static const char * const topbuttonpad_pnp_ids[] = {
         "LEN0036", /* T440 */
         "LEN0037",
         "LEN0038",
+        "LEN0039", /* T440s */
         "LEN0041",
         "LEN0042", /* Yoga */
         "LEN0045",