1 /* 2 * Stephen Evanchik <evanchsa@gmail.com> 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 as published by 6 * the Free Software Foundation. 7 * 8 * Trademarks are the property of their respective owners. 9 */ 10 11 #include <linux/delay.h> 12 #include <linux/serio.h> 13 #include <linux/module.h> 14 #include <linux/moduleparam.h> 15 #include <linux/input.h> 16 #include <linux/libps2.h> 17 #include <linux/proc_fs.h> 18 #include <asm/uaccess.h> 19 #include "psmouse.h" 20 #include "trackpoint.h" 21 22 /* 23 * Device IO: read, write and toggle bit 24 */ 25 static int trackpoint_read(struct ps2dev *ps2dev, unsigned char loc, unsigned char *results) 26 { 27 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) || 28 ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) { 29 return -1; 30 } 31 32 return 0; 33 } 34 35 static int trackpoint_write(struct ps2dev *ps2dev, unsigned char loc, unsigned char val) 36 { 37 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) || 38 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) || 39 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) || 40 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) { 41 return -1; 42 } 43 44 return 0; 45 } 46 47 static int trackpoint_toggle_bit(struct ps2dev *ps2dev, unsigned char loc, unsigned char mask) 48 { 49 /* Bad things will happen if the loc param isn't in this range */ 50 if (loc < 0x20 || loc >= 0x2F) 51 return -1; 52 53 if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) || 54 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) || 55 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) || 56 ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) { 57 return -1; 58 } 59 60 return 0; 61 } 62 63 64 /* 65 * Trackpoint-specific attributes 66 */ 67 struct trackpoint_attr_data { 68 size_t field_offset; 69 unsigned char command; 70 unsigned char mask; 71 }; 72 73 static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf) 74 { 75 struct trackpoint_data *tp = psmouse->private; 76 struct trackpoint_attr_data *attr = data; 77 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); 78 79 return sprintf(buf, "%u\n", *field); 80 } 81 82 static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data, 83 const char *buf, size_t count) 84 { 85 struct trackpoint_data *tp = psmouse->private; 86 struct trackpoint_attr_data *attr = data; 87 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); 88 unsigned long value; 89 char *rest; 90 91 value = simple_strtoul(buf, &rest, 10); 92 if (*rest || value > 255) 93 return -EINVAL; 94 95 *field = value; 96 trackpoint_write(&psmouse->ps2dev, attr->command, value); 97 98 return count; 99 } 100 101 #define TRACKPOINT_INT_ATTR(_name, _command) \ 102 static struct trackpoint_attr_data trackpoint_attr_##_name = { \ 103 .field_offset = offsetof(struct trackpoint_data, _name), \ 104 .command = _command, \ 105 }; \ 106 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ 107 &trackpoint_attr_##_name, \ 108 trackpoint_show_int_attr, trackpoint_set_int_attr) 109 110 static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data, 111 const char *buf, size_t count) 112 { 113 struct trackpoint_data *tp = psmouse->private; 114 struct trackpoint_attr_data *attr = data; 115 unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset); 116 unsigned long value; 117 char *rest; 118 119 value = simple_strtoul(buf, &rest, 10); 120 if (*rest || value > 1) 121 return -EINVAL; 122 123 if (*field != value) { 124 *field = value; 125 trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask); 126 } 127 128 return count; 129 } 130 131 132 #define TRACKPOINT_BIT_ATTR(_name, _command, _mask) \ 133 static struct trackpoint_attr_data trackpoint_attr_##_name = { \ 134 .field_offset = offsetof(struct trackpoint_data, _name), \ 135 .command = _command, \ 136 .mask = _mask, \ 137 }; \ 138 PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \ 139 &trackpoint_attr_##_name, \ 140 trackpoint_show_int_attr, trackpoint_set_bit_attr) 141 142 TRACKPOINT_INT_ATTR(sensitivity, TP_SENS); 143 TRACKPOINT_INT_ATTR(speed, TP_SPEED); 144 TRACKPOINT_INT_ATTR(inertia, TP_INERTIA); 145 TRACKPOINT_INT_ATTR(reach, TP_REACH); 146 TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS); 147 TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG); 148 TRACKPOINT_INT_ATTR(thresh, TP_THRESH); 149 TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH); 150 TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME); 151 TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV); 152 153 TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON); 154 TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK); 155 TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV); 156 157 static struct attribute *trackpoint_attrs[] = { 158 &psmouse_attr_sensitivity.dattr.attr, 159 &psmouse_attr_speed.dattr.attr, 160 &psmouse_attr_inertia.dattr.attr, 161 &psmouse_attr_reach.dattr.attr, 162 &psmouse_attr_draghys.dattr.attr, 163 &psmouse_attr_mindrag.dattr.attr, 164 &psmouse_attr_thresh.dattr.attr, 165 &psmouse_attr_upthresh.dattr.attr, 166 &psmouse_attr_ztime.dattr.attr, 167 &psmouse_attr_jenks.dattr.attr, 168 &psmouse_attr_press_to_select.dattr.attr, 169 &psmouse_attr_skipback.dattr.attr, 170 &psmouse_attr_ext_dev.dattr.attr, 171 NULL 172 }; 173 174 static struct attribute_group trackpoint_attr_group = { 175 .attrs = trackpoint_attrs, 176 }; 177 178 static void trackpoint_disconnect(struct psmouse *psmouse) 179 { 180 sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group); 181 182 kfree(psmouse->private); 183 psmouse->private = NULL; 184 } 185 186 static int trackpoint_sync(struct psmouse *psmouse) 187 { 188 unsigned char toggle; 189 struct trackpoint_data *tp = psmouse->private; 190 191 if (!tp) 192 return -1; 193 194 /* Disable features that may make device unusable with this driver */ 195 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle); 196 if (toggle & TP_MASK_TWOHAND) 197 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND); 198 199 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle); 200 if (toggle & TP_MASK_SOURCE_TAG) 201 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG); 202 203 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle); 204 if (toggle & TP_MASK_MB) 205 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB); 206 207 /* Push the config to the device */ 208 trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity); 209 trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia); 210 trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed); 211 212 trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach); 213 trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys); 214 trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag); 215 216 trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh); 217 trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh); 218 219 trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime); 220 trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks); 221 222 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle); 223 if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select) 224 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON); 225 226 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle); 227 if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback) 228 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK); 229 230 trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle); 231 if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev) 232 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV); 233 234 return 0; 235 } 236 237 static void trackpoint_defaults(struct trackpoint_data *tp) 238 { 239 tp->press_to_select = TP_DEF_PTSON; 240 tp->sensitivity = TP_DEF_SENS; 241 tp->speed = TP_DEF_SPEED; 242 tp->reach = TP_DEF_REACH; 243 244 tp->draghys = TP_DEF_DRAGHYS; 245 tp->mindrag = TP_DEF_MINDRAG; 246 247 tp->thresh = TP_DEF_THRESH; 248 tp->upthresh = TP_DEF_UP_THRESH; 249 250 tp->ztime = TP_DEF_Z_TIME; 251 tp->jenks = TP_DEF_JENKS_CURV; 252 253 tp->inertia = TP_DEF_INERTIA; 254 tp->skipback = TP_DEF_SKIPBACK; 255 tp->ext_dev = TP_DEF_EXT_DEV; 256 } 257 258 int trackpoint_detect(struct psmouse *psmouse, int set_properties) 259 { 260 struct trackpoint_data *priv; 261 struct ps2dev *ps2dev = &psmouse->ps2dev; 262 unsigned char firmware_id; 263 unsigned char button_info; 264 unsigned char param[2]; 265 266 param[0] = param[1] = 0; 267 268 if (ps2_command(ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID))) 269 return -1; 270 271 if (param[0] != TP_MAGIC_IDENT) 272 return -1; 273 274 if (!set_properties) 275 return 0; 276 277 firmware_id = param[1]; 278 279 if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) { 280 printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n"); 281 button_info = 0; 282 } 283 284 psmouse->private = priv = kcalloc(1, sizeof(struct trackpoint_data), GFP_KERNEL); 285 if (!priv) 286 return -1; 287 288 psmouse->vendor = "IBM"; 289 psmouse->name = "TrackPoint"; 290 291 psmouse->reconnect = trackpoint_sync; 292 psmouse->disconnect = trackpoint_disconnect; 293 294 trackpoint_defaults(priv); 295 trackpoint_sync(psmouse); 296 297 sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group); 298 299 printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n", 300 firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f); 301 302 return 0; 303 } 304 305