Input: psmouse - add support for IBM TrackPoint devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 297 insertions, 0 deletions

diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
new file mode 100644
index 0000000..aee3b24
--- /dev/null
+++ b/drivers/input/mouse/trackpoint.c
@@ -0,0 +1,297 @@
+/*
+ * Stephen Evanchik <evanchsa@gmail.com>
+ *
+ * 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.
+ *
+ * Trademarks are the property of their respective owners.
+ */
+
+#include <linux/delay.h>
+#include <linux/serio.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/input.h>
+#include <linux/libps2.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+#include "psmouse.h"
+#include "trackpoint.h"
+
+PSMOUSE_DEFINE_ATTR(sensitivity);
+PSMOUSE_DEFINE_ATTR(speed);
+PSMOUSE_DEFINE_ATTR(inertia);
+PSMOUSE_DEFINE_ATTR(reach);
+PSMOUSE_DEFINE_ATTR(draghys);
+PSMOUSE_DEFINE_ATTR(mindrag);
+PSMOUSE_DEFINE_ATTR(thresh);
+PSMOUSE_DEFINE_ATTR(upthresh);
+PSMOUSE_DEFINE_ATTR(ztime);
+PSMOUSE_DEFINE_ATTR(jenks);
+PSMOUSE_DEFINE_ATTR(press_to_select);
+PSMOUSE_DEFINE_ATTR(skipback);
+PSMOUSE_DEFINE_ATTR(ext_dev);
+
+#define MAKE_ATTR_READ(_item) \
+	static ssize_t psmouse_attr_show_##_item(struct psmouse *psmouse, char *buf) \
+	{ \
+		struct trackpoint_data *tp = psmouse->private; \
+		return sprintf(buf, "%lu\n", (unsigned long)tp->_item); \
+	}
+
+#define MAKE_ATTR_WRITE(_item, command) \
+	static ssize_t psmouse_attr_set_##_item(struct psmouse *psmouse, const char *buf, size_t count) \
+	{ \
+		char *rest; \
+		unsigned long value; \
+		struct trackpoint_data *tp = psmouse->private; \
+		value = simple_strtoul(buf, &rest, 10); \
+		if (*rest) \
+			return -EINVAL; \
+		tp->_item = value; \
+		trackpoint_write(&psmouse->ps2dev, command, tp->_item); \
+		return count; \
+	}
+
+#define MAKE_ATTR_TOGGLE(_item, command, mask) \
+	static ssize_t psmouse_attr_set_##_item(struct psmouse *psmouse, const char *buf, size_t count) \
+	{ \
+		unsigned char toggle; \
+		struct trackpoint_data *tp = psmouse->private; \
+		toggle = (buf[0] == '1') ? 1 : 0; \
+		if (toggle != tp->_item) { \
+			tp->_item = toggle; \
+			trackpoint_toggle_bit(&psmouse->ps2dev, command, mask); \
+		} \
+		return count; \
+	}
+
+/*
+ * Device IO: read, write and toggle bit
+ */
+static int trackpoint_read(struct ps2dev *ps2dev, unsigned char loc, unsigned char *results)
+{
+	if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
+	    ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static int trackpoint_write(struct ps2dev *ps2dev, unsigned char loc, unsigned char val)
+{
+	if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) {
+		return -1;
+	}
+
+	return 0;
+}
+
+static int trackpoint_toggle_bit(struct ps2dev *ps2dev, unsigned char loc, unsigned char mask)
+{
+	/* Bad things will happen if the loc param isn't in this range */
+	if (loc < 0x20 || loc >= 0x2F)
+		return -1;
+
+	if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
+	    ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) {
+		return -1;
+	}
+
+	return 0;
+}
+
+MAKE_ATTR_WRITE(sensitivity, TP_SENS);
+MAKE_ATTR_READ(sensitivity);
+
+MAKE_ATTR_WRITE(speed, TP_SPEED);
+MAKE_ATTR_READ(speed);
+
+MAKE_ATTR_WRITE(inertia, TP_INERTIA);
+MAKE_ATTR_READ(inertia);
+
+MAKE_ATTR_WRITE(reach, TP_REACH);
+MAKE_ATTR_READ(reach);
+
+MAKE_ATTR_WRITE(draghys, TP_DRAGHYS);
+MAKE_ATTR_READ(draghys);
+
+MAKE_ATTR_WRITE(mindrag, TP_MINDRAG);
+MAKE_ATTR_READ(mindrag);
+
+MAKE_ATTR_WRITE(thresh, TP_THRESH);
+MAKE_ATTR_READ(thresh);
+
+MAKE_ATTR_WRITE(upthresh, TP_UP_THRESH);
+MAKE_ATTR_READ(upthresh);
+
+MAKE_ATTR_WRITE(ztime, TP_Z_TIME);
+MAKE_ATTR_READ(ztime);
+
+MAKE_ATTR_WRITE(jenks, TP_JENKS_CURV);
+MAKE_ATTR_READ(jenks);
+
+MAKE_ATTR_TOGGLE(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON);
+MAKE_ATTR_READ(press_to_select);
+
+MAKE_ATTR_TOGGLE(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
+MAKE_ATTR_READ(skipback);
+
+MAKE_ATTR_TOGGLE(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
+MAKE_ATTR_READ(ext_dev);
+
+static struct attribute *trackpoint_attrs[] = {
+	&psmouse_attr_sensitivity.attr,
+	&psmouse_attr_speed.attr,
+	&psmouse_attr_inertia.attr,
+	&psmouse_attr_reach.attr,
+	&psmouse_attr_draghys.attr,
+	&psmouse_attr_mindrag.attr,
+	&psmouse_attr_thresh.attr,
+	&psmouse_attr_upthresh.attr,
+	&psmouse_attr_ztime.attr,
+	&psmouse_attr_jenks.attr,
+	&psmouse_attr_press_to_select.attr,
+	&psmouse_attr_skipback.attr,
+	&psmouse_attr_ext_dev.attr,
+	NULL
+};
+
+static struct attribute_group trackpoint_attr_group = {
+	.attrs = trackpoint_attrs,
+};
+
+static void trackpoint_disconnect(struct psmouse *psmouse)
+{
+	sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
+
+	kfree(psmouse->private);
+	psmouse->private = NULL;
+}
+
+static int trackpoint_sync(struct psmouse *psmouse)
+{
+	unsigned char toggle;
+	struct trackpoint_data *tp = psmouse->private;
+
+	if (!tp)
+		return -1;
+
+	/* Disable features that may make device unusable with this driver */
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);
+	if (toggle & TP_MASK_TWOHAND)
+		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND);
+
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle);
+	if (toggle & TP_MASK_SOURCE_TAG)
+		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG);
+
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle);
+	if (toggle & TP_MASK_MB)
+		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB);
+
+	/* Push the config to the device */
+	trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity);
+	trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia);
+	trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed);
+
+	trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach);
+	trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys);
+	trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag);
+
+	trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh);
+	trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh);
+
+	trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime);
+	trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks);
+
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle);
+	if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select)
+		 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON);
+
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle);
+	if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback)
+		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
+
+	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle);
+	if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev)
+		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
+
+	return 0;
+}
+
+static void trackpoint_defaults(struct trackpoint_data *tp)
+{
+	tp->press_to_select = TP_DEF_PTSON;
+	tp->sensitivity = TP_DEF_SENS;
+	tp->speed = TP_DEF_SPEED;
+	tp->reach = TP_DEF_REACH;
+
+	tp->draghys = TP_DEF_DRAGHYS;
+	tp->mindrag = TP_DEF_MINDRAG;
+
+	tp->thresh = TP_DEF_THRESH;
+	tp->upthresh = TP_DEF_UP_THRESH;
+
+	tp->ztime = TP_DEF_Z_TIME;
+	tp->jenks = TP_DEF_JENKS_CURV;
+
+	tp->inertia = TP_DEF_INERTIA;
+	tp->skipback = TP_DEF_SKIPBACK;
+	tp->ext_dev = TP_DEF_EXT_DEV;
+}
+
+int trackpoint_detect(struct psmouse *psmouse, int set_properties)
+{
+	struct trackpoint_data *priv;
+	struct ps2dev *ps2dev = &psmouse->ps2dev;
+	unsigned char firmware_id;
+	unsigned char button_info;
+	unsigned char param[2];
+
+	param[0] = param[1] = 0;
+
+	if (ps2_command(ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
+		return -1;
+
+	if (param[0] != TP_MAGIC_IDENT)
+		return -1;
+
+	if (!set_properties)
+		return 0;
+
+	firmware_id = param[1];
+
+	if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
+		printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");
+		button_info = 0;
+	}
+
+	psmouse->private = priv = kcalloc(1, sizeof(struct trackpoint_data), GFP_KERNEL);
+	if (!priv)
+		return -1;
+
+	psmouse->vendor = "IBM";
+	psmouse->name = "TrackPoint";
+
+	psmouse->reconnect = trackpoint_sync;
+	psmouse->disconnect = trackpoint_disconnect;
+
+	trackpoint_defaults(priv);
+	trackpoint_sync(psmouse);
+
+	sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
+
+	printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
+		firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f);
+
+	return 0;
+}
+