Andrew Duggan | b43d2c1 | 2016-03-10 15:55:29 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2012-2016 Synaptics Incorporated |
| 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 | #include <linux/input.h> |
| 9 | #include <linux/input/mt.h> |
| 10 | #include <linux/rmi.h> |
| 11 | #include "rmi_driver.h" |
| 12 | #include "rmi_2d_sensor.h" |
| 13 | |
| 14 | enum rmi_f12_object_type { |
| 15 | RMI_F12_OBJECT_NONE = 0x00, |
| 16 | RMI_F12_OBJECT_FINGER = 0x01, |
| 17 | RMI_F12_OBJECT_STYLUS = 0x02, |
| 18 | RMI_F12_OBJECT_PALM = 0x03, |
| 19 | RMI_F12_OBJECT_UNCLASSIFIED = 0x04, |
| 20 | RMI_F12_OBJECT_GLOVED_FINGER = 0x06, |
| 21 | RMI_F12_OBJECT_NARROW_OBJECT = 0x07, |
| 22 | RMI_F12_OBJECT_HAND_EDGE = 0x08, |
| 23 | RMI_F12_OBJECT_COVER = 0x0A, |
| 24 | RMI_F12_OBJECT_STYLUS_2 = 0x0B, |
| 25 | RMI_F12_OBJECT_ERASER = 0x0C, |
| 26 | RMI_F12_OBJECT_SMALL_OBJECT = 0x0D, |
| 27 | }; |
| 28 | |
| 29 | struct f12_data { |
| 30 | struct rmi_function *fn; |
| 31 | struct rmi_2d_sensor sensor; |
| 32 | struct rmi_2d_sensor_platform_data sensor_pdata; |
| 33 | |
| 34 | u16 data_addr; |
| 35 | |
| 36 | struct rmi_register_descriptor query_reg_desc; |
| 37 | struct rmi_register_descriptor control_reg_desc; |
| 38 | struct rmi_register_descriptor data_reg_desc; |
| 39 | |
| 40 | /* F12 Data1 describes sensed objects */ |
| 41 | const struct rmi_register_desc_item *data1; |
| 42 | u16 data1_offset; |
| 43 | |
| 44 | /* F12 Data5 describes finger ACM */ |
| 45 | const struct rmi_register_desc_item *data5; |
| 46 | u16 data5_offset; |
| 47 | |
| 48 | /* F12 Data5 describes Pen */ |
| 49 | const struct rmi_register_desc_item *data6; |
| 50 | u16 data6_offset; |
| 51 | |
| 52 | |
| 53 | /* F12 Data9 reports relative data */ |
| 54 | const struct rmi_register_desc_item *data9; |
| 55 | u16 data9_offset; |
| 56 | |
| 57 | const struct rmi_register_desc_item *data15; |
| 58 | u16 data15_offset; |
| 59 | }; |
| 60 | |
| 61 | static int rmi_f12_read_sensor_tuning(struct f12_data *f12) |
| 62 | { |
| 63 | const struct rmi_register_desc_item *item; |
| 64 | struct rmi_2d_sensor *sensor = &f12->sensor; |
| 65 | struct rmi_function *fn = sensor->fn; |
| 66 | struct rmi_device *rmi_dev = fn->rmi_dev; |
| 67 | int ret; |
| 68 | int offset; |
Andrew Duggan | e4add7b | 2016-07-19 17:53:59 -0700 | [diff] [blame] | 69 | u8 buf[15]; |
Andrew Duggan | b43d2c1 | 2016-03-10 15:55:29 -0800 | [diff] [blame] | 70 | int pitch_x = 0; |
| 71 | int pitch_y = 0; |
| 72 | int clip_x_low = 0; |
| 73 | int clip_x_high = 0; |
| 74 | int clip_y_low = 0; |
| 75 | int clip_y_high = 0; |
| 76 | int rx_receivers = 0; |
| 77 | int tx_receivers = 0; |
| 78 | int sensor_flags = 0; |
| 79 | |
| 80 | item = rmi_get_register_desc_item(&f12->control_reg_desc, 8); |
| 81 | if (!item) { |
| 82 | dev_err(&fn->dev, |
| 83 | "F12 does not have the sensor tuning control register\n"); |
| 84 | return -ENODEV; |
| 85 | } |
| 86 | |
| 87 | offset = rmi_register_desc_calc_reg_offset(&f12->control_reg_desc, 8); |
| 88 | |
Andrew Duggan | e4add7b | 2016-07-19 17:53:59 -0700 | [diff] [blame] | 89 | if (item->reg_size > sizeof(buf)) { |
| 90 | dev_err(&fn->dev, |
| 91 | "F12 control8 should be no bigger than %zd bytes, not: %ld\n", |
| 92 | sizeof(buf), item->reg_size); |
Andrew Duggan | b43d2c1 | 2016-03-10 15:55:29 -0800 | [diff] [blame] | 93 | return -ENODEV; |
| 94 | } |
| 95 | |
| 96 | ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + offset, buf, |
| 97 | item->reg_size); |
| 98 | if (ret) |
| 99 | return ret; |
| 100 | |
| 101 | offset = 0; |
| 102 | if (rmi_register_desc_has_subpacket(item, 0)) { |
| 103 | sensor->max_x = (buf[offset + 1] << 8) | buf[offset]; |
| 104 | sensor->max_y = (buf[offset + 3] << 8) | buf[offset + 2]; |
| 105 | offset += 4; |
| 106 | } |
| 107 | |
| 108 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: max_x: %d max_y: %d\n", __func__, |
| 109 | sensor->max_x, sensor->max_y); |
| 110 | |
| 111 | if (rmi_register_desc_has_subpacket(item, 1)) { |
| 112 | pitch_x = (buf[offset + 1] << 8) | buf[offset]; |
| 113 | pitch_y = (buf[offset + 3] << 8) | buf[offset + 2]; |
| 114 | offset += 4; |
| 115 | } |
| 116 | |
| 117 | if (rmi_register_desc_has_subpacket(item, 2)) { |
| 118 | sensor->axis_align.clip_x_low = buf[offset]; |
| 119 | sensor->axis_align.clip_x_high = sensor->max_x |
| 120 | - buf[offset + 1]; |
| 121 | sensor->axis_align.clip_y_low = buf[offset + 2]; |
| 122 | sensor->axis_align.clip_y_high = sensor->max_y |
| 123 | - buf[offset + 3]; |
| 124 | offset += 4; |
| 125 | } |
| 126 | |
| 127 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x low: %d x high: %d y low: %d y high: %d\n", |
| 128 | __func__, clip_x_low, clip_x_high, clip_y_low, clip_y_high); |
| 129 | |
| 130 | if (rmi_register_desc_has_subpacket(item, 3)) { |
| 131 | rx_receivers = buf[offset]; |
| 132 | tx_receivers = buf[offset + 1]; |
| 133 | offset += 2; |
| 134 | } |
| 135 | |
| 136 | if (rmi_register_desc_has_subpacket(item, 4)) { |
| 137 | sensor_flags = buf[offset]; |
| 138 | offset += 1; |
| 139 | } |
| 140 | |
| 141 | sensor->x_mm = (pitch_x * rx_receivers) >> 12; |
| 142 | sensor->y_mm = (pitch_y * tx_receivers) >> 12; |
| 143 | |
| 144 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x_mm: %d y_mm: %d\n", __func__, |
| 145 | sensor->x_mm, sensor->y_mm); |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1) |
| 151 | { |
| 152 | int i; |
| 153 | struct rmi_2d_sensor *sensor = &f12->sensor; |
| 154 | |
| 155 | for (i = 0; i < f12->data1->num_subpackets; i++) { |
| 156 | struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i]; |
| 157 | |
| 158 | obj->type = RMI_2D_OBJECT_NONE; |
| 159 | obj->mt_tool = MT_TOOL_FINGER; |
| 160 | |
| 161 | switch (data1[0]) { |
| 162 | case RMI_F12_OBJECT_FINGER: |
| 163 | obj->type = RMI_2D_OBJECT_FINGER; |
| 164 | break; |
| 165 | case RMI_F12_OBJECT_STYLUS: |
| 166 | obj->type = RMI_2D_OBJECT_STYLUS; |
| 167 | obj->mt_tool = MT_TOOL_PEN; |
| 168 | break; |
| 169 | case RMI_F12_OBJECT_PALM: |
| 170 | obj->type = RMI_2D_OBJECT_PALM; |
| 171 | obj->mt_tool = MT_TOOL_PALM; |
| 172 | break; |
| 173 | case RMI_F12_OBJECT_UNCLASSIFIED: |
| 174 | obj->type = RMI_2D_OBJECT_UNCLASSIFIED; |
| 175 | break; |
| 176 | } |
| 177 | |
| 178 | obj->x = (data1[2] << 8) | data1[1]; |
| 179 | obj->y = (data1[4] << 8) | data1[3]; |
| 180 | obj->z = data1[5]; |
| 181 | obj->wx = data1[6]; |
| 182 | obj->wy = data1[7]; |
| 183 | |
| 184 | rmi_2d_sensor_abs_process(sensor, obj, i); |
| 185 | |
| 186 | data1 += 8; |
| 187 | } |
| 188 | |
| 189 | if (sensor->kernel_tracking) |
| 190 | input_mt_assign_slots(sensor->input, |
| 191 | sensor->tracking_slots, |
| 192 | sensor->tracking_pos, |
| 193 | sensor->nbr_fingers, |
| 194 | sensor->dmax); |
| 195 | |
| 196 | for (i = 0; i < sensor->nbr_fingers; i++) |
| 197 | rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i); |
| 198 | } |
| 199 | |
| 200 | static int rmi_f12_attention(struct rmi_function *fn, |
| 201 | unsigned long *irq_nr_regs) |
| 202 | { |
| 203 | int retval; |
| 204 | struct rmi_device *rmi_dev = fn->rmi_dev; |
| 205 | struct f12_data *f12 = dev_get_drvdata(&fn->dev); |
| 206 | struct rmi_2d_sensor *sensor = &f12->sensor; |
| 207 | |
| 208 | if (rmi_dev->xport->attn_data) { |
| 209 | memcpy(sensor->data_pkt, rmi_dev->xport->attn_data, |
| 210 | sensor->attn_size); |
| 211 | rmi_dev->xport->attn_data += sensor->attn_size; |
| 212 | rmi_dev->xport->attn_size -= sensor->attn_size; |
| 213 | } else { |
| 214 | retval = rmi_read_block(rmi_dev, f12->data_addr, |
| 215 | sensor->data_pkt, sensor->pkt_size); |
| 216 | if (retval < 0) { |
| 217 | dev_err(&fn->dev, "Failed to read object data. Code: %d.\n", |
| 218 | retval); |
| 219 | return retval; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | if (f12->data1) |
| 224 | rmi_f12_process_objects(f12, |
| 225 | &sensor->data_pkt[f12->data1_offset]); |
| 226 | |
| 227 | input_mt_sync_frame(sensor->input); |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | static int rmi_f12_config(struct rmi_function *fn) |
| 233 | { |
| 234 | struct rmi_driver *drv = fn->rmi_dev->driver; |
| 235 | |
| 236 | drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | |
| 241 | static int rmi_f12_probe(struct rmi_function *fn) |
| 242 | { |
| 243 | struct f12_data *f12; |
| 244 | int ret; |
| 245 | struct rmi_device *rmi_dev = fn->rmi_dev; |
| 246 | char buf; |
| 247 | u16 query_addr = fn->fd.query_base_addr; |
| 248 | const struct rmi_register_desc_item *item; |
| 249 | struct rmi_2d_sensor *sensor; |
| 250 | struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); |
| 251 | struct rmi_transport_dev *xport = rmi_dev->xport; |
| 252 | u16 data_offset = 0; |
| 253 | |
| 254 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s\n", __func__); |
| 255 | |
| 256 | ret = rmi_read(fn->rmi_dev, query_addr, &buf); |
| 257 | if (ret < 0) { |
| 258 | dev_err(&fn->dev, "Failed to read general info register: %d\n", |
| 259 | ret); |
| 260 | return -ENODEV; |
| 261 | } |
| 262 | ++query_addr; |
| 263 | |
| 264 | if (!(buf & 0x1)) { |
| 265 | dev_err(&fn->dev, |
| 266 | "Behavior of F12 without register descriptors is undefined.\n"); |
| 267 | return -ENODEV; |
| 268 | } |
| 269 | |
| 270 | f12 = devm_kzalloc(&fn->dev, sizeof(struct f12_data), GFP_KERNEL); |
| 271 | if (!f12) |
| 272 | return -ENOMEM; |
| 273 | |
| 274 | if (fn->dev.of_node) { |
| 275 | ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata); |
| 276 | if (ret) |
| 277 | return ret; |
| 278 | } else if (pdata->sensor_pdata) { |
| 279 | f12->sensor_pdata = *pdata->sensor_pdata; |
| 280 | } |
| 281 | |
| 282 | ret = rmi_read_register_desc(rmi_dev, query_addr, |
| 283 | &f12->query_reg_desc); |
| 284 | if (ret) { |
| 285 | dev_err(&fn->dev, |
| 286 | "Failed to read the Query Register Descriptor: %d\n", |
| 287 | ret); |
| 288 | return ret; |
| 289 | } |
| 290 | query_addr += 3; |
| 291 | |
| 292 | ret = rmi_read_register_desc(rmi_dev, query_addr, |
| 293 | &f12->control_reg_desc); |
| 294 | if (ret) { |
| 295 | dev_err(&fn->dev, |
| 296 | "Failed to read the Control Register Descriptor: %d\n", |
| 297 | ret); |
| 298 | return ret; |
| 299 | } |
| 300 | query_addr += 3; |
| 301 | |
| 302 | ret = rmi_read_register_desc(rmi_dev, query_addr, |
| 303 | &f12->data_reg_desc); |
| 304 | if (ret) { |
| 305 | dev_err(&fn->dev, |
| 306 | "Failed to read the Data Register Descriptor: %d\n", |
| 307 | ret); |
| 308 | return ret; |
| 309 | } |
| 310 | query_addr += 3; |
| 311 | |
| 312 | sensor = &f12->sensor; |
| 313 | sensor->fn = fn; |
| 314 | f12->data_addr = fn->fd.data_base_addr; |
| 315 | sensor->pkt_size = rmi_register_desc_calc_size(&f12->data_reg_desc); |
| 316 | |
| 317 | sensor->axis_align = |
| 318 | f12->sensor_pdata.axis_align; |
| 319 | |
| 320 | sensor->x_mm = f12->sensor_pdata.x_mm; |
| 321 | sensor->y_mm = f12->sensor_pdata.y_mm; |
| 322 | |
| 323 | if (sensor->sensor_type == rmi_sensor_default) |
| 324 | sensor->sensor_type = |
| 325 | f12->sensor_pdata.sensor_type; |
| 326 | |
| 327 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: data packet size: %d\n", __func__, |
| 328 | sensor->pkt_size); |
| 329 | sensor->data_pkt = devm_kzalloc(&fn->dev, sensor->pkt_size, GFP_KERNEL); |
| 330 | if (!sensor->data_pkt) |
| 331 | return -ENOMEM; |
| 332 | |
| 333 | dev_set_drvdata(&fn->dev, f12); |
| 334 | |
| 335 | ret = rmi_f12_read_sensor_tuning(f12); |
| 336 | if (ret) |
| 337 | return ret; |
| 338 | |
| 339 | /* |
| 340 | * Figure out what data is contained in the data registers. HID devices |
| 341 | * may have registers defined, but their data is not reported in the |
| 342 | * HID attention report. Registers which are not reported in the HID |
| 343 | * attention report check to see if the device is receiving data from |
| 344 | * HID attention reports. |
| 345 | */ |
| 346 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 0); |
| 347 | if (item && !xport->attn_data) |
| 348 | data_offset += item->reg_size; |
| 349 | |
| 350 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 1); |
| 351 | if (item) { |
| 352 | f12->data1 = item; |
| 353 | f12->data1_offset = data_offset; |
| 354 | data_offset += item->reg_size; |
| 355 | sensor->nbr_fingers = item->num_subpackets; |
| 356 | sensor->report_abs = 1; |
| 357 | sensor->attn_size += item->reg_size; |
| 358 | } |
| 359 | |
| 360 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 2); |
| 361 | if (item && !xport->attn_data) |
| 362 | data_offset += item->reg_size; |
| 363 | |
| 364 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 3); |
| 365 | if (item && !xport->attn_data) |
| 366 | data_offset += item->reg_size; |
| 367 | |
| 368 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 4); |
| 369 | if (item && !xport->attn_data) |
| 370 | data_offset += item->reg_size; |
| 371 | |
| 372 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 5); |
| 373 | if (item) { |
| 374 | f12->data5 = item; |
| 375 | f12->data5_offset = data_offset; |
| 376 | data_offset += item->reg_size; |
| 377 | sensor->attn_size += item->reg_size; |
| 378 | } |
| 379 | |
| 380 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 6); |
| 381 | if (item && !xport->attn_data) { |
| 382 | f12->data6 = item; |
| 383 | f12->data6_offset = data_offset; |
| 384 | data_offset += item->reg_size; |
| 385 | } |
| 386 | |
| 387 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 7); |
| 388 | if (item && !xport->attn_data) |
| 389 | data_offset += item->reg_size; |
| 390 | |
| 391 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 8); |
| 392 | if (item && !xport->attn_data) |
| 393 | data_offset += item->reg_size; |
| 394 | |
| 395 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 9); |
| 396 | if (item && !xport->attn_data) { |
| 397 | f12->data9 = item; |
| 398 | f12->data9_offset = data_offset; |
| 399 | data_offset += item->reg_size; |
| 400 | if (!sensor->report_abs) |
| 401 | sensor->report_rel = 1; |
| 402 | } |
| 403 | |
| 404 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 10); |
| 405 | if (item && !xport->attn_data) |
| 406 | data_offset += item->reg_size; |
| 407 | |
| 408 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 11); |
| 409 | if (item && !xport->attn_data) |
| 410 | data_offset += item->reg_size; |
| 411 | |
| 412 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 12); |
| 413 | if (item && !xport->attn_data) |
| 414 | data_offset += item->reg_size; |
| 415 | |
| 416 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 13); |
| 417 | if (item && !xport->attn_data) |
| 418 | data_offset += item->reg_size; |
| 419 | |
| 420 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 14); |
| 421 | if (item && !xport->attn_data) |
| 422 | data_offset += item->reg_size; |
| 423 | |
| 424 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 15); |
| 425 | if (item && !xport->attn_data) { |
| 426 | f12->data15 = item; |
| 427 | f12->data15_offset = data_offset; |
| 428 | data_offset += item->reg_size; |
| 429 | } |
| 430 | |
| 431 | /* allocate the in-kernel tracking buffers */ |
| 432 | sensor->tracking_pos = devm_kzalloc(&fn->dev, |
| 433 | sizeof(struct input_mt_pos) * sensor->nbr_fingers, |
| 434 | GFP_KERNEL); |
| 435 | sensor->tracking_slots = devm_kzalloc(&fn->dev, |
| 436 | sizeof(int) * sensor->nbr_fingers, GFP_KERNEL); |
| 437 | sensor->objs = devm_kzalloc(&fn->dev, |
| 438 | sizeof(struct rmi_2d_sensor_abs_object) |
| 439 | * sensor->nbr_fingers, GFP_KERNEL); |
| 440 | if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs) |
| 441 | return -ENOMEM; |
| 442 | |
| 443 | ret = rmi_2d_sensor_configure_input(fn, sensor); |
| 444 | if (ret) |
| 445 | return ret; |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | struct rmi_function_handler rmi_f12_handler = { |
| 451 | .driver = { |
| 452 | .name = "rmi4_f12", |
| 453 | }, |
| 454 | .func = 0x12, |
| 455 | .probe = rmi_f12_probe, |
| 456 | .config = rmi_f12_config, |
| 457 | .attention = rmi_f12_attention, |
| 458 | }; |