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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: appletouch - improve powersaving for Geyser3 devices
  Input: lifebook - fix an oops on Panasonic CF-18
  Input: document intended meaning of KEY_SWITCHVIDEOMODE
  Input: switch to using seq_list_xxx helpers
  Input: i8042 - give more trust to PNP data on i386
  Input: add driver for Fujitsu serial touchscreens
  Input: ads7846 - re-check pendown status before reporting events
  Input: ads7846 - introduce sample settling delay
  Input: xpad - add support for leds on xbox 360 pad

4 files changed, 282 insertions, 1 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 69371779806a..f929fcdbae2e 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -54,6 +54,19 @@ config TOUCHSCREEN_CORGI
           To compile this driver as a module, choose M here: the
           module will be called corgi_ts.
 
+config TOUCHSCREEN_FUJITSU
+        tristate "Fujitsu serial touchscreen"
+        select SERIO
+        help
+          Say Y here if you have the Fujitsu touchscreen (such as one
+          installed in Lifebook P series laptop) connected to your
+          system.
+
+          If unsure, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called fujitsu-ts.
+
 config TOUCHSCREEN_GUNZE
         tristate "Gunze AHL-51S touchscreen"
         select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 2f86d6ad06d3..5de8933c4993 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_TOUCHSCREEN_BITSY)		+= h3600_ts_input.o
 obj-$(CONFIG_TOUCHSCREEN_CORGI)         += corgi_ts.o
 obj-$(CONFIG_TOUCHSCREEN_GUNZE)         += gunze.o
 obj-$(CONFIG_TOUCHSCREEN_ELO)           += elo.o
+obj-$(CONFIG_TOUCHSCREEN_FUJITSU)       += fujitsu_ts.o
 obj-$(CONFIG_TOUCHSCREEN_MTOUCH)        += mtouch.o
 obj-$(CONFIG_TOUCHSCREEN_MK712)         += mk712.o
 obj-$(CONFIG_TOUCHSCREEN_HP600)         += hp680_ts_input.o
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 1c9069cd3bae..96581d08774f 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -95,7 +95,7 @@ struct ads7846 {
         u16                     dummy;          /* for the pwrdown read */
         struct ts_event         tc;
 
-        struct spi_transfer     xfer[10];
+        struct spi_transfer     xfer[18];
         struct spi_message      msg[5];
         struct spi_message      *last_msg;
         int                     msg_idx;
@@ -107,6 +107,8 @@ struct ads7846 {
         u16                     debounce_tol;
         u16                     debounce_rep;
 
+        u16                     penirq_recheck_delay_usecs;
+
         spinlock_t              lock;
         struct hrtimer          timer;
         unsigned                pendown:1;      /* P: lock */
@@ -553,6 +555,15 @@ static void ads7846_rx(void *ads)
                 return;
         }
 
+        /* Maybe check the pendown state before reporting. This discards
+         * false readings when the pen is lifted.
+         */
+        if (ts->penirq_recheck_delay_usecs) {
+                udelay(ts->penirq_recheck_delay_usecs);
+                if (!ts->get_pendown_state())
+                        Rt = 0;
+        }
+
         /* NOTE: We can't rely on the pressure to determine the pen down
          * state, even this controller has a pressure sensor.  The pressure
          * value can fluctuate for quite a while after lifting the pen and
@@ -896,6 +907,10 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 ts->filter = ads7846_no_filter;
         ts->get_pendown_state = pdata->get_pendown_state;
 
+        if (pdata->penirq_recheck_delay_usecs)
+                ts->penirq_recheck_delay_usecs =
+                                pdata->penirq_recheck_delay_usecs;
+
         snprintf(ts->phys, sizeof(ts->phys), "%s/input0", spi->dev.bus_id);
 
         input_dev->name = "ADS784x Touchscreen";
@@ -936,6 +951,24 @@ static int __devinit ads7846_probe(struct spi_device *spi)
         x->len = 2;
         spi_message_add_tail(x, m);
 
+        /* the first sample after switching drivers can be low quality;
+         * optionally discard it, using a second one after the signals
+         * have had enough time to stabilize.
+         */
+        if (pdata->settle_delay_usecs) {
+                x->delay_usecs = pdata->settle_delay_usecs;
+
+                x++;
+                x->tx_buf = &ts->read_y;
+                x->len = 1;
+                spi_message_add_tail(x, m);
+
+                x++;
+                x->rx_buf = &ts->tc.y;
+                x->len = 2;
+                spi_message_add_tail(x, m);
+        }
+
         m->complete = ads7846_rx_val;
         m->context = ts;
 
@@ -954,6 +987,21 @@ static int __devinit ads7846_probe(struct spi_device *spi)
         x->len = 2;
         spi_message_add_tail(x, m);
 
+        /* ... maybe discard first sample ... */
+        if (pdata->settle_delay_usecs) {
+                x->delay_usecs = pdata->settle_delay_usecs;
+
+                x++;
+                x->tx_buf = &ts->read_x;
+                x->len = 1;
+                spi_message_add_tail(x, m);
+
+                x++;
+                x->rx_buf = &ts->tc.x;
+                x->len = 2;
+                spi_message_add_tail(x, m);
+        }
+
         m->complete = ads7846_rx_val;
         m->context = ts;
 
@@ -973,6 +1021,21 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 x->len = 2;
                 spi_message_add_tail(x, m);
 
+                /* ... maybe discard first sample ... */
+                if (pdata->settle_delay_usecs) {
+                        x->delay_usecs = pdata->settle_delay_usecs;
+
+                        x++;
+                        x->tx_buf = &ts->read_z1;
+                        x->len = 1;
+                        spi_message_add_tail(x, m);
+
+                        x++;
+                        x->rx_buf = &ts->tc.z1;
+                        x->len = 2;
+                        spi_message_add_tail(x, m);
+                }
+
                 m->complete = ads7846_rx_val;
                 m->context = ts;
 
@@ -990,6 +1053,21 @@ static int __devinit ads7846_probe(struct spi_device *spi)
                 x->len = 2;
                 spi_message_add_tail(x, m);
 
+                /* ... maybe discard first sample ... */
+                if (pdata->settle_delay_usecs) {
+                        x->delay_usecs = pdata->settle_delay_usecs;
+
+                        x++;
+                        x->tx_buf = &ts->read_z2;
+                        x->len = 1;
+                        spi_message_add_tail(x, m);
+
+                        x++;
+                        x->rx_buf = &ts->tc.z2;
+                        x->len = 2;
+                        spi_message_add_tail(x, m);
+                }
+
                 m->complete = ads7846_rx_val;
                 m->context = ts;
         }
diff --git a/drivers/input/touchscreen/fujitsu_ts.c b/drivers/input/touchscreen/fujitsu_ts.c
new file mode 100644
index 000000000000..daf7a4afc935
--- /dev/null
+++ b/drivers/input/touchscreen/fujitsu_ts.c
@@ -0,0 +1,189 @@
+/*
+ * Fujitsu serial touchscreen driver
+ *
+ * Copyright (c) Dmitry Torokhov <dtor@mail.ru>
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+#define DRIVER_DESC     "Fujitsu serial touchscreen driver"
+
+MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#define FUJITSU_LENGTH 5
+
+/*
+ * Per-touchscreen data.
+ */
+struct fujitsu {
+        struct input_dev *dev;
+        struct serio *serio;
+        int idx;
+        unsigned char data[FUJITSU_LENGTH];
+        char phys[32];
+};
+
+/*
+ * Decode serial data (5 bytes per packet)
+ * First byte
+ * 1 C 0 0 R S S S
+ * Where C is 1 while in calibration mode (which we don't use)
+ * R is 1 when no coordinate corection was done.
+ * S are button state
+ */
+static irqreturn_t fujitsu_interrupt(struct serio *serio,
+                                     unsigned char data, unsigned int flags)
+{
+        struct fujitsu *fujitsu = serio_get_drvdata(serio);
+        struct input_dev *dev = fujitsu->dev;
+
+        if (fujitsu->idx == 0) {
+                /* resync skip until start of frame */
+                if ((data & 0xf0) != 0x80)
+                        return IRQ_HANDLED;
+        } else {
+                /* resync skip garbage */
+                if (data & 0x80) {
+                        fujitsu->idx = 0;
+                        return IRQ_HANDLED;
+                }
+        }
+
+        fujitsu->data[fujitsu->idx++] = data;
+        if (fujitsu->idx == FUJITSU_LENGTH) {
+                input_report_abs(dev, ABS_X,
+                                 (fujitsu->data[2] << 7) | fujitsu->data[1]);
+                input_report_abs(dev, ABS_Y,
+                                 (fujitsu->data[4] << 7) | fujitsu->data[3]);
+                input_report_key(dev, BTN_TOUCH,
+                                 (fujitsu->data[0] & 0x03) != 2);
+                input_sync(dev);
+                fujitsu->idx = 0;
+        }
+
+        return IRQ_HANDLED;
+}
+
+/*
+ * fujitsu_disconnect() is the opposite of fujitsu_connect()
+ */
+static void fujitsu_disconnect(struct serio *serio)
+{
+        struct fujitsu *fujitsu = serio_get_drvdata(serio);
+
+        input_get_device(fujitsu->dev);
+        input_unregister_device(fujitsu->dev);
+        serio_close(serio);
+        serio_set_drvdata(serio, NULL);
+        input_put_device(fujitsu->dev);
+        kfree(fujitsu);
+}
+
+/*
+ * fujitsu_connect() is the routine that is called when someone adds a
+ * new serio device that supports the Fujitsu protocol and registers it
+ * as input device.
+ */
+static int fujitsu_connect(struct serio *serio, struct serio_driver *drv)
+{
+        struct fujitsu *fujitsu;
+        struct input_dev *input_dev;
+        int err;
+
+        fujitsu = kzalloc(sizeof(struct fujitsu), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!fujitsu || !input_dev) {
+                err = -ENOMEM;
+                goto fail1;
+        }
+
+        fujitsu->serio = serio;
+        fujitsu->dev = input_dev;
+        snprintf(fujitsu->phys, sizeof(fujitsu->phys),
+                 "%s/input0", serio->phys);
+
+        input_dev->name = "Fujitsu Serial Touchscreen";
+        input_dev->phys = fujitsu->phys;
+        input_dev->id.bustype = BUS_RS232;
+        input_dev->id.vendor = SERIO_FUJITSU;
+        input_dev->id.product = 0;
+        input_dev->id.version = 0x0100;
+        input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+        input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
+
+        input_set_abs_params(input_dev, ABS_X, 0, 4096, 0, 0);
+        input_set_abs_params(input_dev, ABS_Y, 0, 4096, 0, 0);
+        serio_set_drvdata(serio, fujitsu);
+
+        err = serio_open(serio, drv);
+        if (err)
+                goto fail2;
+
+        err = input_register_device(fujitsu->dev);
+        if (err)
+                goto fail3;
+
+        return 0;
+
+ fail3:
+        serio_close(serio);
+ fail2:
+        serio_set_drvdata(serio, NULL);
+ fail1:
+        input_free_device(input_dev);
+        kfree(fujitsu);
+        return err;
+}
+
+/*
+ * The serio driver structure.
+ */
+static struct serio_device_id fujitsu_serio_ids[] = {
+        {
+                .type   = SERIO_RS232,
+                .proto  = SERIO_FUJITSU,
+                .id     = SERIO_ANY,
+                .extra  = SERIO_ANY,
+        },
+        { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, fujitsu_serio_ids);
+
+static struct serio_driver fujitsu_drv = {
+        .driver         = {
+                .name   = "fujitsu_ts",
+        },
+        .description    = DRIVER_DESC,
+        .id_table       = fujitsu_serio_ids,
+        .interrupt      = fujitsu_interrupt,
+        .connect        = fujitsu_connect,
+        .disconnect     = fujitsu_disconnect,
+};
+
+static int __init fujitsu_init(void)
+{
+        return serio_register_driver(&fujitsu_drv);
+}
+
+static void __exit fujitsu_exit(void)
+{
+        serio_unregister_driver(&fujitsu_drv);
+}
+
+module_init(fujitsu_init);
+module_exit(fujitsu_exit);