diff options
Diffstat (limited to 'drivers/input/mouse/trackpoint.c')
| -rw-r--r-- | drivers/input/mouse/trackpoint.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c new file mode 100644 index 000000000000..b4898d8a68e2 --- /dev/null +++ b/drivers/input/mouse/trackpoint.c @@ -0,0 +1,304 @@ +/* + * 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" + +/* + * 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; +} + + +/* + * Trackpoint-specific attributes + */ +struct trackpoint_attr_data { + size_t field_offset; + unsigned char command; + unsigned char mask; +}; + +static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf) +{ + struct trackpoint_data *tp = psmouse->private; + struct trackpoint_attr_data *attr = data; + unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); + + return sprintf(buf, "%u\n", *field); +} + +static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data, + const char *buf, size_t count) +{ + struct trackpoint_data *tp = psmouse->private; + struct trackpoint_attr_data *attr = data; + unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); + unsigned long value; + char *rest; + + value = simple_strtoul(buf, &rest, 10); + if (*rest || value > 255) + return -EINVAL; + + *field = value; + trackpoint_write(&psmouse->ps2dev, attr->command, value); + + return count; +} + +#define TRACKPOINT_INT_ATTR(_name, _command) \ + static struct trackpoint_attr_data trackpoint_attr_##_name = { \ + .field_offset = offsetof(struct trackpoint_data, _name), \ + .command = _command, \ + }; \ + PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ + &trackpoint_attr_##_name, \ + trackpoint_show_int_attr, trackpoint_set_int_attr) + +static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data, + const char *buf, size_t count) +{ + struct trackpoint_data *tp = psmouse->private; + struct trackpoint_attr_data *attr = data; + unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); + unsigned long value; + char *rest; + + value = simple_strtoul(buf, &rest, 10); + if (*rest || value > 1) + return -EINVAL; + + if (*field != value) { + *field = value; + trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask); + } + + return count; +} + + +#define TRACKPOINT_BIT_ATTR(_name, _command, _mask) \ + static struct trackpoint_attr_data trackpoint_attr_##_name = { \ + .field_offset = offsetof(struct trackpoint_data, _name), \ + .command = _command, \ + .mask = _mask, \ + }; \ + PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ + &trackpoint_attr_##_name, \ + trackpoint_show_int_attr, trackpoint_set_bit_attr) + +TRACKPOINT_INT_ATTR(sensitivity, TP_SENS); +TRACKPOINT_INT_ATTR(speed, TP_SPEED); +TRACKPOINT_INT_ATTR(inertia, TP_INERTIA); +TRACKPOINT_INT_ATTR(reach, TP_REACH); +TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS); +TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG); +TRACKPOINT_INT_ATTR(thresh, TP_THRESH); +TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH); +TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME); +TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV); + +TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON); +TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK); +TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV); + +static struct attribute *trackpoint_attrs[] = { + &psmouse_attr_sensitivity.dattr.attr, + &psmouse_attr_speed.dattr.attr, + &psmouse_attr_inertia.dattr.attr, + &psmouse_attr_reach.dattr.attr, + &psmouse_attr_draghys.dattr.attr, + &psmouse_attr_mindrag.dattr.attr, + &psmouse_attr_thresh.dattr.attr, + &psmouse_attr_upthresh.dattr.attr, + &psmouse_attr_ztime.dattr.attr, + &psmouse_attr_jenks.dattr.attr, + &psmouse_attr_press_to_select.dattr.attr, + &psmouse_attr_skipback.dattr.attr, + &psmouse_attr_ext_dev.dattr.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; +} + |