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![Vincent Huang](/assets/img/avatar_default.png)
Add Synaptics IDs in trackpoint_start_protocol() to mark them as valid.
Signed-off-by: Vincent Huang <vincent.huang@tw.synaptics.com>
Fixes: 6c77545af1
("Input: trackpoint - add new trackpoint variant IDs")
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Tested-by: Harry Cutts <hcutts@chromium.org>
Link: https://lore.kernel.org/r/20200924053013.1056953-1-vincent.huang@tw.synaptics.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
475 lines
13 KiB
C
475 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Stephen Evanchik <evanchsa@gmail.com>
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*
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* Trademarks are the property of their respective owners.
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*/
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/serio.h>
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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/libps2.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include "psmouse.h"
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#include "trackpoint.h"
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static const char * const trackpoint_variants[] = {
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[TP_VARIANT_IBM] = "IBM",
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[TP_VARIANT_ALPS] = "ALPS",
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[TP_VARIANT_ELAN] = "Elan",
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[TP_VARIANT_NXP] = "NXP",
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[TP_VARIANT_JYT_SYNAPTICS] = "JYT_Synaptics",
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[TP_VARIANT_SYNAPTICS] = "Synaptics",
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};
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/*
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* Power-on Reset: Resets all trackpoint parameters, including RAM values,
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* to defaults.
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* Returns zero on success, non-zero on failure.
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*/
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static int trackpoint_power_on_reset(struct ps2dev *ps2dev)
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{
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u8 param[2] = { TP_POR };
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int err;
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err = ps2_command(ps2dev, param, MAKE_PS2_CMD(1, 2, TP_COMMAND));
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if (err)
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return err;
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/* Check for success response -- 0xAA00 */
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if (param[0] != 0xAA || param[1] != 0x00)
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return -ENODEV;
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return 0;
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}
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/*
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* Device IO: read, write and toggle bit
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*/
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static int trackpoint_read(struct ps2dev *ps2dev, u8 loc, u8 *results)
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{
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results[0] = loc;
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return ps2_command(ps2dev, results, MAKE_PS2_CMD(1, 1, TP_COMMAND));
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}
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static int trackpoint_write(struct ps2dev *ps2dev, u8 loc, u8 val)
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{
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u8 param[3] = { TP_WRITE_MEM, loc, val };
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return ps2_command(ps2dev, param, MAKE_PS2_CMD(3, 0, TP_COMMAND));
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}
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static int trackpoint_toggle_bit(struct ps2dev *ps2dev, u8 loc, u8 mask)
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{
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u8 param[3] = { TP_TOGGLE, loc, mask };
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/* Bad things will happen if the loc param isn't in this range */
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if (loc < 0x20 || loc >= 0x2F)
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return -EINVAL;
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return ps2_command(ps2dev, param, MAKE_PS2_CMD(3, 0, TP_COMMAND));
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}
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static int trackpoint_update_bit(struct ps2dev *ps2dev,
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u8 loc, u8 mask, u8 value)
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{
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int retval;
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u8 data;
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retval = trackpoint_read(ps2dev, loc, &data);
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if (retval)
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return retval;
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if (((data & mask) == mask) != !!value)
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retval = trackpoint_toggle_bit(ps2dev, loc, mask);
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return retval;
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}
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/*
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* Trackpoint-specific attributes
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*/
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struct trackpoint_attr_data {
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size_t field_offset;
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u8 command;
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u8 mask;
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bool inverted;
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u8 power_on_default;
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};
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static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse,
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void *data, char *buf)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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u8 value = *(u8 *)((void *)tp + attr->field_offset);
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if (attr->inverted)
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value = !value;
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return sprintf(buf, "%u\n", value);
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}
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static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
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const char *buf, size_t count)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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u8 *field = (void *)tp + attr->field_offset;
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u8 value;
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int err;
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err = kstrtou8(buf, 10, &value);
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if (err)
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return err;
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*field = value;
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err = trackpoint_write(&psmouse->ps2dev, attr->command, value);
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return err ?: count;
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}
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#define TRACKPOINT_INT_ATTR(_name, _command, _default) \
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static struct trackpoint_attr_data trackpoint_attr_##_name = { \
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.field_offset = offsetof(struct trackpoint_data, _name), \
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.command = _command, \
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.power_on_default = _default, \
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}; \
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PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
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&trackpoint_attr_##_name, \
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trackpoint_show_int_attr, trackpoint_set_int_attr)
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static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
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const char *buf, size_t count)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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bool *field = (void *)tp + attr->field_offset;
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bool value;
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int err;
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err = kstrtobool(buf, &value);
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if (err)
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return err;
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if (attr->inverted)
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value = !value;
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if (*field != value) {
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*field = value;
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err = trackpoint_toggle_bit(&psmouse->ps2dev,
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attr->command, attr->mask);
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}
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return err ?: count;
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}
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#define TRACKPOINT_BIT_ATTR(_name, _command, _mask, _inv, _default) \
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static struct trackpoint_attr_data trackpoint_attr_##_name = { \
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.field_offset = offsetof(struct trackpoint_data, \
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_name), \
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.command = _command, \
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.mask = _mask, \
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.inverted = _inv, \
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.power_on_default = _default, \
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}; \
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PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
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&trackpoint_attr_##_name, \
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trackpoint_show_int_attr, trackpoint_set_bit_attr)
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TRACKPOINT_INT_ATTR(sensitivity, TP_SENS, TP_DEF_SENS);
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TRACKPOINT_INT_ATTR(speed, TP_SPEED, TP_DEF_SPEED);
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TRACKPOINT_INT_ATTR(inertia, TP_INERTIA, TP_DEF_INERTIA);
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TRACKPOINT_INT_ATTR(reach, TP_REACH, TP_DEF_REACH);
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TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS, TP_DEF_DRAGHYS);
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TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG, TP_DEF_MINDRAG);
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TRACKPOINT_INT_ATTR(thresh, TP_THRESH, TP_DEF_THRESH);
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TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH, TP_DEF_UP_THRESH);
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TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME, TP_DEF_Z_TIME);
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TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV, TP_DEF_JENKS_CURV);
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TRACKPOINT_INT_ATTR(drift_time, TP_DRIFT_TIME, TP_DEF_DRIFT_TIME);
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TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, false,
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TP_DEF_PTSON);
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TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, false,
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TP_DEF_SKIPBACK);
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TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, true,
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TP_DEF_EXT_DEV);
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static bool trackpoint_is_attr_available(struct psmouse *psmouse,
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struct attribute *attr)
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{
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struct trackpoint_data *tp = psmouse->private;
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return tp->variant_id == TP_VARIANT_IBM ||
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attr == &psmouse_attr_sensitivity.dattr.attr ||
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attr == &psmouse_attr_press_to_select.dattr.attr;
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}
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static umode_t trackpoint_is_attr_visible(struct kobject *kobj,
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struct attribute *attr, int n)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct serio *serio = to_serio_port(dev);
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struct psmouse *psmouse = serio_get_drvdata(serio);
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return trackpoint_is_attr_available(psmouse, attr) ? attr->mode : 0;
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}
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static struct attribute *trackpoint_attrs[] = {
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&psmouse_attr_sensitivity.dattr.attr,
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&psmouse_attr_speed.dattr.attr,
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&psmouse_attr_inertia.dattr.attr,
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&psmouse_attr_reach.dattr.attr,
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&psmouse_attr_draghys.dattr.attr,
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&psmouse_attr_mindrag.dattr.attr,
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&psmouse_attr_thresh.dattr.attr,
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&psmouse_attr_upthresh.dattr.attr,
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&psmouse_attr_ztime.dattr.attr,
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&psmouse_attr_jenks.dattr.attr,
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&psmouse_attr_drift_time.dattr.attr,
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&psmouse_attr_press_to_select.dattr.attr,
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&psmouse_attr_skipback.dattr.attr,
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&psmouse_attr_ext_dev.dattr.attr,
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NULL
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};
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static struct attribute_group trackpoint_attr_group = {
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.is_visible = trackpoint_is_attr_visible,
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.attrs = trackpoint_attrs,
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};
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#define TRACKPOINT_UPDATE(_power_on, _psmouse, _tp, _name) \
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do { \
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struct trackpoint_attr_data *_attr = &trackpoint_attr_##_name; \
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\
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if ((!_power_on || _tp->_name != _attr->power_on_default) && \
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trackpoint_is_attr_available(_psmouse, \
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&psmouse_attr_##_name.dattr.attr)) { \
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if (!_attr->mask) \
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trackpoint_write(&_psmouse->ps2dev, \
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_attr->command, _tp->_name); \
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else \
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trackpoint_update_bit(&_psmouse->ps2dev, \
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_attr->command, _attr->mask, \
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_tp->_name); \
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} \
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} while (0)
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#define TRACKPOINT_SET_POWER_ON_DEFAULT(_tp, _name) \
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do { \
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_tp->_name = trackpoint_attr_##_name.power_on_default; \
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} while (0)
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static int trackpoint_start_protocol(struct psmouse *psmouse,
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u8 *variant_id, u8 *firmware_id)
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{
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u8 param[2] = { 0 };
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int error;
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error = ps2_command(&psmouse->ps2dev,
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param, MAKE_PS2_CMD(0, 2, TP_READ_ID));
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if (error)
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return error;
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switch (param[0]) {
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case TP_VARIANT_IBM:
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case TP_VARIANT_ALPS:
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case TP_VARIANT_ELAN:
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case TP_VARIANT_NXP:
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case TP_VARIANT_JYT_SYNAPTICS:
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case TP_VARIANT_SYNAPTICS:
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if (variant_id)
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*variant_id = param[0];
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if (firmware_id)
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*firmware_id = param[1];
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return 0;
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}
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return -ENODEV;
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}
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/*
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* Write parameters to trackpad.
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* in_power_on_state: Set to true if TP is in default / power-on state (ex. if
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* power-on reset was run). If so, values will only be
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* written to TP if they differ from power-on default.
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*/
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static int trackpoint_sync(struct psmouse *psmouse, bool in_power_on_state)
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{
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struct trackpoint_data *tp = psmouse->private;
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if (!in_power_on_state && tp->variant_id == TP_VARIANT_IBM) {
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/*
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* Disable features that may make device unusable
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* with this driver.
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*/
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trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND,
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TP_MASK_TWOHAND, TP_DEF_TWOHAND);
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trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG,
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TP_MASK_SOURCE_TAG, TP_DEF_SOURCE_TAG);
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trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_MB,
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TP_MASK_MB, TP_DEF_MB);
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}
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/*
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* These properties can be changed in this driver. Only
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* configure them if the values are non-default or if the TP is in
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* an unknown state.
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*/
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, sensitivity);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, inertia);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, speed);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, reach);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, draghys);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, mindrag);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, thresh);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, upthresh);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ztime);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, jenks);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, drift_time);
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/* toggles */
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, press_to_select);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, skipback);
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TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ext_dev);
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return 0;
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}
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static void trackpoint_defaults(struct trackpoint_data *tp)
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{
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, sensitivity);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, speed);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, reach);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, draghys);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, mindrag);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, thresh);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, upthresh);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ztime);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, jenks);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, drift_time);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, inertia);
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/* toggles */
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, press_to_select);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, skipback);
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TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ext_dev);
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}
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static void trackpoint_disconnect(struct psmouse *psmouse)
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{
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device_remove_group(&psmouse->ps2dev.serio->dev,
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&trackpoint_attr_group);
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kfree(psmouse->private);
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psmouse->private = NULL;
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}
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static int trackpoint_reconnect(struct psmouse *psmouse)
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{
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struct trackpoint_data *tp = psmouse->private;
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int error;
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bool was_reset;
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error = trackpoint_start_protocol(psmouse, NULL, NULL);
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if (error)
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return error;
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was_reset = tp->variant_id == TP_VARIANT_IBM &&
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trackpoint_power_on_reset(&psmouse->ps2dev) == 0;
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error = trackpoint_sync(psmouse, was_reset);
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if (error)
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return error;
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return 0;
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}
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int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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struct trackpoint_data *tp;
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u8 variant_id;
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u8 firmware_id;
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u8 button_info;
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int error;
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error = trackpoint_start_protocol(psmouse, &variant_id, &firmware_id);
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if (error)
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return error;
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if (!set_properties)
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return 0;
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tp = kzalloc(sizeof(*tp), GFP_KERNEL);
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if (!tp)
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return -ENOMEM;
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trackpoint_defaults(tp);
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tp->variant_id = variant_id;
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tp->firmware_id = firmware_id;
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psmouse->private = tp;
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psmouse->vendor = trackpoint_variants[variant_id];
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psmouse->name = "TrackPoint";
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psmouse->reconnect = trackpoint_reconnect;
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psmouse->disconnect = trackpoint_disconnect;
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if (variant_id != TP_VARIANT_IBM) {
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/* Newer variants do not support extended button query. */
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button_info = 0x33;
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} else {
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error = trackpoint_read(ps2dev, TP_EXT_BTN, &button_info);
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if (error) {
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psmouse_warn(psmouse,
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"failed to get extended button data, assuming 3 buttons\n");
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button_info = 0x33;
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} else if (!button_info) {
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psmouse_warn(psmouse,
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"got 0 in extended button data, assuming 3 buttons\n");
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button_info = 0x33;
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}
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}
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if ((button_info & 0x0f) >= 3)
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input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
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__set_bit(INPUT_PROP_POINTER, psmouse->dev->propbit);
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__set_bit(INPUT_PROP_POINTING_STICK, psmouse->dev->propbit);
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if (variant_id != TP_VARIANT_IBM ||
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trackpoint_power_on_reset(ps2dev) != 0) {
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/*
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* Write defaults to TP if we did not reset the trackpoint.
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*/
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trackpoint_sync(psmouse, false);
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}
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error = device_add_group(&ps2dev->serio->dev, &trackpoint_attr_group);
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if (error) {
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psmouse_err(psmouse,
|
|
"failed to create sysfs attributes, error: %d\n",
|
|
error);
|
|
kfree(psmouse->private);
|
|
psmouse->private = NULL;
|
|
return -1;
|
|
}
|
|
|
|
psmouse_info(psmouse,
|
|
"%s TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
|
|
psmouse->vendor, firmware_id,
|
|
(button_info & 0xf0) >> 4, button_info & 0x0f);
|
|
|
|
return 0;
|
|
}
|
|
|