rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 1 | /* |
Kedi Xu | 8e92903 | 2019-02-22 14:29:46 +0800 | [diff] [blame] | 2 | * Copyright (c) 2019, The Linux Foundation. All rights reserved. |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kobject.h> |
| 16 | #include <linux/string.h> |
| 17 | #include <linux/sysfs.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/msm_ion.h> |
| 21 | #include <linux/usb.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/hid.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/input.h> |
| 27 | #include <linux/hiddev.h> |
| 28 | #include <linux/hid-debug.h> |
| 29 | #include <linux/hidraw.h> |
| 30 | #include <linux/device.h> |
| 31 | #include <linux/of_gpio.h> |
| 32 | #include <linux/of_irq.h> |
| 33 | #include <linux/gpio.h> |
| 34 | #include <linux/timekeeping.h> |
| 35 | #include <linux/ion.h> |
| 36 | #include "../soc/qcom/smp2p_private.h" |
| 37 | #include "hid-ids.h" |
| 38 | #include "hid-qvr.h" |
rbandi | 32f19a6 | 2018-10-18 11:31:32 -0700 | [diff] [blame] | 39 | #include "hid-trace.h" |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 40 | |
| 41 | static struct ion_handle *handle; |
| 42 | static struct ion_client *client; |
| 43 | static void *vaddr; |
| 44 | static size_t vsize; |
| 45 | static uint64_t ts_base; |
| 46 | static uint64_t ts_offset; |
| 47 | static int msg_size = 368; |
| 48 | |
| 49 | struct gpio_info { |
| 50 | int gpio_base_id; |
| 51 | int irq_base_id; |
| 52 | }; |
| 53 | |
| 54 | |
| 55 | /* GPIO Inbound/Outbound callback info */ |
| 56 | struct gpio_inout { |
| 57 | struct gpio_info in; |
| 58 | struct gpio_info out; |
| 59 | }; |
| 60 | |
| 61 | static struct gpio_inout gpio_info[SMP2P_NUM_PROCS]; |
| 62 | static struct gpio_info *in_gpio_info_ptr; |
| 63 | static struct gpio_info *out_gpio_info_ptr; |
| 64 | |
| 65 | |
| 66 | static struct hid_driver qvr_external_sensor_driver; |
| 67 | static int fd; |
| 68 | |
| 69 | |
| 70 | struct ion_handle { |
| 71 | struct kref ref; |
| 72 | unsigned int user_ref_count; |
| 73 | struct ion_client *client; |
| 74 | struct ion_buffer *buffer; |
| 75 | struct rb_node node; |
| 76 | unsigned int kmap_cnt; |
| 77 | int id; |
| 78 | }; |
| 79 | |
| 80 | struct qvr_buf_index { |
| 81 | int most_recent_index; |
| 82 | uint8_t padding[60]; |
| 83 | }; |
| 84 | |
| 85 | struct qvr_sensor_t { |
| 86 | uint64_t gts; |
| 87 | uint64_t ats; |
| 88 | uint64_t mts; |
| 89 | s32 gx; |
| 90 | s32 gy; |
| 91 | s32 gz; |
| 92 | s32 ax; |
| 93 | s32 ay; |
| 94 | s32 az; |
| 95 | s32 mx; |
| 96 | s32 my; |
| 97 | s32 mz; |
| 98 | uint8_t padding[4]; |
| 99 | }; |
| 100 | |
| 101 | |
| 102 | int qvr_send_package_wrap(u8 *message, int msize, struct hid_device *hid) |
| 103 | { |
| 104 | struct qvr_sensor_t *sensor_buf; |
| 105 | struct qvr_sensor_t *data; |
| 106 | static int buf_index; |
| 107 | struct external_imu_format imuData = { 0 }; |
| 108 | struct qvr_buf_index *index_buf; |
| 109 | |
| 110 | /* |
| 111 | * Actual message size is 369 bytes |
| 112 | * to make it 8 byte aligned we created a structure of size 368 bytes. |
| 113 | * Ignoring the first byte 'report id' (which is always 1) |
| 114 | * |
| 115 | */ |
| 116 | memcpy((void *)&imuData, (void *)message + 1, msg_size); |
| 117 | |
| 118 | if (!ts_base) |
| 119 | ts_base = ktime_to_ns(ktime_get_boottime()); |
| 120 | if (!ts_offset) |
| 121 | ts_offset = imuData.gts0; |
| 122 | index_buf = (struct qvr_buf_index *) |
| 123 | ((uintptr_t)vaddr + (vsize / 2) + (8 * sizeof(*sensor_buf))); |
| 124 | sensor_buf = (struct qvr_sensor_t *)((uintptr_t)vaddr + (vsize / 2)); |
| 125 | |
| 126 | data = (struct qvr_sensor_t *)&(sensor_buf[buf_index]); |
| 127 | if (ts_offset > imuData.gts0) |
| 128 | data->ats = ts_base + ((ts_offset - imuData.gts0) * 100); |
| 129 | else |
| 130 | data->ats = ts_base + ((imuData.gts0 - ts_offset) * 100); |
| 131 | if (imuData.mts0 == 0) |
| 132 | data->mts = 0; |
| 133 | else |
| 134 | data->mts = data->ats; |
| 135 | data->gts = data->ats; |
| 136 | data->ax = -imuData.ax0; |
| 137 | data->ay = imuData.ay0; |
| 138 | data->az = -imuData.az0; |
| 139 | data->gx = -imuData.gx0; |
| 140 | data->gy = imuData.gy0; |
| 141 | data->gz = -imuData.gz0; |
Kedi Xu | 8e92903 | 2019-02-22 14:29:46 +0800 | [diff] [blame] | 142 | data->mx = -imuData.my0; |
| 143 | data->my = -imuData.mx0; |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 144 | data->mz = -imuData.mz0; |
| 145 | |
rbandi | 32f19a6 | 2018-10-18 11:31:32 -0700 | [diff] [blame] | 146 | trace_qvr_recv_sensor("gyro", data->gts, data->gx, data->gy, data->gz); |
| 147 | trace_qvr_recv_sensor("accel", data->ats, data->ax, data->ay, data->az); |
| 148 | |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 149 | pr_debug("%s: gts= %llu, gx= %d, gy=%d, gz=%d", __func__, |
| 150 | data->gts, data->gx, data->gy, data->gz); |
| 151 | pr_debug("%s: ats= %llu, ax= %d, ay=%d, az=%d", __func__, |
| 152 | data->ats, data->ax, data->ay, data->az); |
| 153 | pr_debug("%s: mts= %llu, mx= %d, my=%d, mz=%d", __func__, |
| 154 | data->mts, data->mx, data->my, data->mz); |
| 155 | |
| 156 | index_buf->most_recent_index = buf_index; |
| 157 | buf_index = (buf_index == (8 - 1)) ? 0 : buf_index + 1; |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | static int register_smp2p(char *node_name, struct gpio_info *gpio_info_ptr) |
| 162 | { |
| 163 | struct device_node *node = NULL; |
| 164 | int cnt = 0; |
| 165 | int id = 0; |
| 166 | |
| 167 | node = of_find_compatible_node(NULL, NULL, node_name); |
| 168 | if (node) { |
| 169 | cnt = of_gpio_count(node); |
| 170 | if (cnt && gpio_info_ptr) { |
| 171 | id = of_get_gpio(node, 0); |
| 172 | if (id == -EPROBE_DEFER) |
| 173 | return id; |
| 174 | gpio_info_ptr->gpio_base_id = id; |
| 175 | gpio_info_ptr->irq_base_id = gpio_to_irq(id); |
| 176 | return 0; |
| 177 | } |
| 178 | } |
| 179 | return -EINVAL; |
| 180 | } |
| 181 | |
| 182 | |
| 183 | |
| 184 | static int kernel_map_gyro_buffer(int fd) |
| 185 | { |
| 186 | handle = ion_import_dma_buf_fd(client, fd); |
| 187 | if (IS_ERR(handle)) { |
| 188 | pr_err("%s: ion_import_dma_buf_fd failed\n", __func__); |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | |
| 192 | if (ion_handle_get_size(client, handle, &vsize)) { |
| 193 | pr_err("%s: Could not dma buf %d size\n", __func__, fd); |
| 194 | return -EINVAL; |
| 195 | } |
| 196 | |
| 197 | vaddr = ion_map_kernel(client, handle); |
| 198 | if (IS_ERR_OR_NULL(vaddr)) { |
| 199 | ion_free(client, handle); |
| 200 | return -EINVAL; |
| 201 | } |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | |
| 207 | static void kernel_unmap_gyro_buffer(void) |
| 208 | { |
| 209 | if (!IS_ERR_OR_NULL(vaddr)) { |
| 210 | ion_unmap_kernel(client, handle); |
| 211 | ion_free(client, handle); |
| 212 | vaddr = NULL; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | static ssize_t fd_show(struct kobject *kobj, |
| 217 | struct kobj_attribute *attr, |
| 218 | char *buf) |
| 219 | { |
| 220 | return snprintf(buf, 16, "%d\n", fd); |
| 221 | } |
| 222 | |
| 223 | static ssize_t fd_store(struct kobject *kobj, |
| 224 | struct kobj_attribute *attr, |
| 225 | const char *buf, size_t count) |
| 226 | { |
| 227 | int ret; |
| 228 | |
| 229 | ret = kstrtoint(buf, 10, &fd); |
| 230 | if (ret < 0) |
| 231 | return ret; |
| 232 | if (fd == -1) |
| 233 | kernel_unmap_gyro_buffer(); |
| 234 | else |
| 235 | kernel_map_gyro_buffer(fd); |
| 236 | ts_base = 0; |
| 237 | ts_offset = 0; |
| 238 | |
| 239 | return count; |
| 240 | } |
| 241 | |
| 242 | static ssize_t ts_base_show(struct kobject *kobj, |
| 243 | struct kobj_attribute *attr, char *buf) |
| 244 | { |
| 245 | return snprintf(buf, 16, "%lld\n", ts_base); |
| 246 | } |
| 247 | |
| 248 | static ssize_t ts_base_store(struct kobject *kobj, |
| 249 | struct kobj_attribute *attr, |
| 250 | const char *buf, size_t count) |
| 251 | { |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static ssize_t ts_offset_show(struct kobject *kobj, |
| 256 | struct kobj_attribute *attr, char *buf) |
| 257 | { |
| 258 | return snprintf(buf, 16, "%lld\n", ts_offset * 100); |
| 259 | } |
| 260 | |
| 261 | static ssize_t ts_offset_store(struct kobject *kobj, |
| 262 | struct kobj_attribute *attr, |
| 263 | const char *buf, size_t count) |
| 264 | { |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | static struct kobj_attribute fd_attribute = __ATTR(fd, 0664, |
| 269 | fd_show, |
| 270 | fd_store); |
| 271 | static struct kobj_attribute ts_base_attribute = __ATTR(ts_base, 0664, |
| 272 | ts_base_show, |
| 273 | ts_base_store); |
| 274 | static struct kobj_attribute ts_offset_attribute = __ATTR(ts_offset, 0664, |
| 275 | ts_offset_show, |
| 276 | ts_offset_store); |
| 277 | |
| 278 | static struct attribute *attrs[] = { |
| 279 | &fd_attribute.attr, |
| 280 | &ts_base_attribute.attr, |
| 281 | &ts_offset_attribute.attr, |
| 282 | NULL, |
| 283 | }; |
| 284 | |
| 285 | static struct attribute_group attr_group = { |
| 286 | .attrs = attrs, |
| 287 | }; |
| 288 | |
| 289 | static struct kobject *qvr_external_sensor_kobj; |
| 290 | |
| 291 | static int qvr_external_sensor_probe(struct hid_device *hdev, |
| 292 | const struct hid_device_id *id) |
| 293 | { |
| 294 | int ret; |
| 295 | char *in_node_name = "qcom,smp2pgpio_client_qvrexternal_5_in"; |
| 296 | char *out_node_name = "qcom,smp2pgpio_client_qvrexternal_5_out"; |
| 297 | __u8 hid_buf[255] = { 0 }; |
| 298 | size_t hid_count = 64; |
| 299 | |
| 300 | ret = register_smp2p(in_node_name, in_gpio_info_ptr); |
| 301 | if (ret) { |
| 302 | pr_err("%s: register_smp2p failed", __func__); |
| 303 | goto err_free; |
| 304 | } |
| 305 | ret = register_smp2p(out_node_name, out_gpio_info_ptr); |
| 306 | if (ret) { |
| 307 | pr_err("%s: register_smp2p failed", __func__); |
| 308 | goto err_free; |
| 309 | } |
| 310 | ret = hid_open_report(hdev); |
| 311 | if (ret) { |
| 312 | pr_err("%s: hid_open_report failed", __func__); |
| 313 | goto err_free; |
| 314 | } |
| 315 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
| 316 | if (ret) { |
| 317 | pr_err("%s: hid_hw_start failed", __func__); |
| 318 | goto err_free; |
| 319 | } |
rbandi | 8674033 | 2018-10-22 11:20:30 -0700 | [diff] [blame] | 320 | hid_buf[0] = 2; |
| 321 | hid_buf[1] = 7; |
| 322 | ret = hid_hw_raw_request(hdev, hid_buf[0], |
| 323 | hid_buf, |
| 324 | hid_count, |
| 325 | HID_FEATURE_REPORT, |
| 326 | HID_REQ_SET_REPORT); |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 327 | return 0; |
| 328 | err_free: |
| 329 | return ret; |
| 330 | |
| 331 | } |
| 332 | |
| 333 | static int qvr_external_sensor_raw_event(struct hid_device *hid, |
| 334 | struct hid_report *report, |
| 335 | u8 *data, int size) |
| 336 | { |
| 337 | int val; |
| 338 | int ret = -1; |
| 339 | |
rbandi | 8674033 | 2018-10-22 11:20:30 -0700 | [diff] [blame] | 340 | if (vaddr != NULL && report->id == 0x1) { |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 341 | ret = qvr_send_package_wrap(data/*hid_value*/, size, hid); |
| 342 | if (ret != 0) { |
| 343 | pr_err("%s: qvr_send_package_wrap failed", __func__); |
| 344 | return ret; |
| 345 | } |
| 346 | val = 1 ^ gpio_get_value(out_gpio_info_ptr->gpio_base_id + 0); |
| 347 | gpio_set_value(out_gpio_info_ptr->gpio_base_id + 0, val); |
| 348 | ret = -1; |
| 349 | } |
| 350 | return ret; |
| 351 | } |
| 352 | |
| 353 | static void qvr_external_sensor_device_remove(struct hid_device *hdev) |
| 354 | { |
| 355 | hid_hw_stop(hdev); |
| 356 | } |
| 357 | |
| 358 | static struct hid_device_id qvr_external_sensor_table[] = { |
| 359 | { HID_USB_DEVICE(USB_VENDOR_ID_QVR5, USB_DEVICE_ID_QVR5) }, |
rbandi | 8674033 | 2018-10-22 11:20:30 -0700 | [diff] [blame] | 360 | { HID_USB_DEVICE(USB_VENDOR_ID_QVR32A, USB_DEVICE_ID_QVR32A) }, |
rbandi | 127f7ad | 2018-09-06 16:28:40 -0700 | [diff] [blame] | 361 | { } |
| 362 | }; |
| 363 | MODULE_DEVICE_TABLE(hid, qvr_external_sensor_table); |
| 364 | |
| 365 | static struct hid_driver qvr_external_sensor_driver = { |
| 366 | .name = "qvr_external_sensor", |
| 367 | .id_table = qvr_external_sensor_table, |
| 368 | .probe = qvr_external_sensor_probe, |
| 369 | .raw_event = qvr_external_sensor_raw_event, |
| 370 | .remove = qvr_external_sensor_device_remove, |
| 371 | }; |
| 372 | |
| 373 | module_hid_driver(qvr_external_sensor_driver); |
| 374 | |
| 375 | static int __init qvr_external_sensor_init(void) |
| 376 | { |
| 377 | const char *device_name = "aoe"; |
| 378 | int ret = 0; |
| 379 | |
| 380 | in_gpio_info_ptr = &gpio_info[SMP2P_CDSP_PROC].in; |
| 381 | in_gpio_info_ptr->gpio_base_id = -1; |
| 382 | out_gpio_info_ptr = &gpio_info[SMP2P_CDSP_PROC].out; |
| 383 | out_gpio_info_ptr->gpio_base_id = -1; |
| 384 | |
| 385 | |
| 386 | qvr_external_sensor_kobj = |
| 387 | kobject_create_and_add("qvr_external_sensor", kernel_kobj); |
| 388 | |
| 389 | if (!qvr_external_sensor_kobj) { |
| 390 | pr_err("%s: kobject_create_and_add() fail\n", __func__); |
| 391 | return -ENOMEM; |
| 392 | } |
| 393 | |
| 394 | ret = sysfs_create_group(qvr_external_sensor_kobj, &attr_group); |
| 395 | if (ret) { |
| 396 | pr_err("%s: can't register sysfs\n", __func__); |
| 397 | return -ENOMEM; |
| 398 | } |
| 399 | |
| 400 | client = msm_ion_client_create(device_name); |
| 401 | if (client == NULL) { |
| 402 | pr_err("msm_ion_client_create failed in %s", __func__); |
| 403 | return -EINVAL; |
| 404 | } |
| 405 | |
| 406 | return ret; |
| 407 | } |
| 408 | |
| 409 | static void __exit qvr_external_sensor_exit(void) |
| 410 | { |
| 411 | kobject_put(qvr_external_sensor_kobj); |
| 412 | } |
| 413 | |
| 414 | module_init(qvr_external_sensor_init); |
| 415 | module_exit(qvr_external_sensor_exit); |
| 416 | MODULE_LICENSE("GPL v2"); |
| 417 | |