Andrew Duggan | 052556f | 2014-04-16 11:32:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Andrew Duggan |
| 3 | * Copyright (C) 2014 Synaptics Inc |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 18 | #include <stdio.h> |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <fcntl.h> |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 22 | #include <dirent.h> |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 23 | #include <errno.h> |
| 24 | #include <string.h> |
| 25 | #include <unistd.h> |
| 26 | #include <sys/ioctl.h> |
| 27 | #include <sys/select.h> |
| 28 | |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/input.h> |
| 31 | #include <linux/hidraw.h> |
| 32 | #include <signal.h> |
| 33 | #include <stdlib.h> |
| 34 | |
| 35 | #include "hiddevice.h" |
| 36 | |
| 37 | #define RMI_WRITE_REPORT_ID 0x9 // Output Report |
| 38 | #define RMI_READ_ADDR_REPORT_ID 0xa // Output Report |
| 39 | #define RMI_READ_DATA_REPORT_ID 0xb // Input Report |
| 40 | #define RMI_ATTN_REPORT_ID 0xc // Input Report |
| 41 | #define RMI_SET_RMI_MODE_REPORT_ID 0xf // Feature Report |
| 42 | |
| 43 | enum rmi_hid_mode_type { |
| 44 | HID_RMI4_MODE_MOUSE = 0, |
| 45 | HID_RMI4_MODE_ATTN_REPORTS = 1, |
| 46 | HID_RMI4_MODE_NO_PACKED_ATTN_REPORTS = 2, |
| 47 | }; |
| 48 | |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 49 | enum hid_report_type { |
| 50 | HID_REPORT_TYPE_UNKNOWN = 0x0, |
| 51 | HID_REPORT_TYPE_INPUT = 0x81, |
| 52 | HID_REPORT_TYPE_OUTPUT = 0x91, |
| 53 | HID_REPORT_TYPE_FEATURE = 0xb1, |
| 54 | }; |
| 55 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 56 | #define HID_RMI4_REPORT_ID 0 |
| 57 | #define HID_RMI4_READ_INPUT_COUNT 1 |
| 58 | #define HID_RMI4_READ_INPUT_DATA 2 |
| 59 | #define HID_RMI4_READ_OUTPUT_ADDR 2 |
| 60 | #define HID_RMI4_READ_OUTPUT_COUNT 4 |
| 61 | #define HID_RMI4_WRITE_OUTPUT_COUNT 1 |
| 62 | #define HID_RMI4_WRITE_OUTPUT_ADDR 2 |
| 63 | #define HID_RMI4_WRITE_OUTPUT_DATA 4 |
| 64 | #define HID_RMI4_FEATURE_MODE 1 |
| 65 | #define HID_RMI4_ATTN_INTERUPT_SOURCES 1 |
| 66 | #define HID_RMI4_ATTN_DATA 2 |
| 67 | |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 68 | #define SYNAPTICS_VENDOR_ID 0x06cb |
| 69 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 70 | int HIDDevice::Open(const char * filename) |
| 71 | { |
| 72 | int rc; |
| 73 | int desc_size; |
| 74 | |
Andrew Duggan | 7216358 | 2014-04-03 16:25:12 -0700 | [diff] [blame] | 75 | if (!filename) |
| 76 | return -EINVAL; |
| 77 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 78 | m_fd = open(filename, O_RDWR); |
| 79 | if (m_fd < 0) |
| 80 | return -1; |
| 81 | |
| 82 | memset(&m_rptDesc, 0, sizeof(m_rptDesc)); |
| 83 | memset(&m_info, 0, sizeof(m_info)); |
| 84 | |
| 85 | rc = ioctl(m_fd, HIDIOCGRDESCSIZE, &desc_size); |
| 86 | if (rc < 0) |
| 87 | return rc; |
| 88 | |
| 89 | m_rptDesc.size = desc_size; |
| 90 | rc = ioctl(m_fd, HIDIOCGRDESC, &m_rptDesc); |
| 91 | if (rc < 0) |
| 92 | return rc; |
| 93 | |
| 94 | rc = ioctl(m_fd, HIDIOCGRAWINFO, &m_info); |
| 95 | if (rc < 0) |
| 96 | return rc; |
| 97 | |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 98 | if (m_info.vendor != SYNAPTICS_VENDOR_ID) { |
| 99 | errno = -ENODEV; |
| 100 | return -1; |
| 101 | } |
| 102 | |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 103 | ParseReportSizes(); |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 104 | |
| 105 | m_inputReport = new unsigned char[m_inputReportSize](); |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 106 | if (!m_inputReport) { |
| 107 | errno = -ENOMEM; |
| 108 | return -1; |
| 109 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 110 | |
| 111 | m_outputReport = new unsigned char[m_outputReportSize](); |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 112 | if (!m_outputReport) { |
| 113 | errno = -ENOMEM; |
| 114 | return -1; |
| 115 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 116 | |
| 117 | m_readData = new unsigned char[m_inputReportSize](); |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 118 | if (!m_readData) { |
| 119 | errno = -ENOMEM; |
| 120 | return -1; |
| 121 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 122 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 123 | m_attnData = new unsigned char[m_inputReportSize](); |
| 124 | if (!m_attnData) { |
Andrew Duggan | fa10fc8 | 2014-07-07 17:36:33 -0700 | [diff] [blame] | 125 | errno = -ENOMEM; |
| 126 | return -1; |
| 127 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 128 | |
| 129 | m_deviceOpen = true; |
| 130 | |
| 131 | rc = SetMode(HID_RMI4_MODE_ATTN_REPORTS); |
| 132 | if (rc) |
| 133 | return -1; |
| 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 138 | void HIDDevice::ParseReportSizes() |
| 139 | { |
| 140 | bool isVendorSpecific = false; |
| 141 | bool isReport = false; |
| 142 | int totalReportSize = 0; |
| 143 | int reportSize = 0; |
| 144 | int reportCount = 0; |
| 145 | enum hid_report_type hidReportType = HID_REPORT_TYPE_UNKNOWN; |
| 146 | |
| 147 | for (unsigned int i = 0; i < m_rptDesc.size; ++i) { |
| 148 | if (isVendorSpecific) { |
| 149 | if (m_rptDesc.value[i] == 0x85 || m_rptDesc.value[i] == 0xc0) { |
| 150 | if (isReport) { |
| 151 | // finish up data on the previous report |
| 152 | totalReportSize = (reportSize * reportCount) >> 3; |
| 153 | |
| 154 | switch (hidReportType) { |
| 155 | case HID_REPORT_TYPE_INPUT: |
| 156 | m_inputReportSize = totalReportSize + 1; |
| 157 | break; |
| 158 | case HID_REPORT_TYPE_OUTPUT: |
| 159 | m_outputReportSize = totalReportSize + 1; |
| 160 | break; |
| 161 | case HID_REPORT_TYPE_FEATURE: |
| 162 | m_featureReportSize = totalReportSize + 1; |
| 163 | break; |
| 164 | case HID_REPORT_TYPE_UNKNOWN: |
| 165 | default: |
| 166 | break; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | // reset values for the new report |
| 171 | totalReportSize = 0; |
| 172 | reportSize = 0; |
| 173 | reportCount = 0; |
| 174 | hidReportType = HID_REPORT_TYPE_UNKNOWN; |
| 175 | |
| 176 | if (m_rptDesc.value[i] == 0x85) |
| 177 | isReport = true; |
| 178 | else |
| 179 | isReport = false; |
| 180 | |
| 181 | if (m_rptDesc.value[i] == 0xc0) |
| 182 | isVendorSpecific = false; |
| 183 | } |
| 184 | |
| 185 | if (isReport) { |
| 186 | if (m_rptDesc.value[i] == 0x75) { |
Andrew de los Reyes | ec066ee | 2015-09-04 14:43:47 -0700 | [diff] [blame] | 187 | if (i + 1 >= m_rptDesc.size) |
| 188 | return; |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 189 | reportSize = m_rptDesc.value[++i]; |
| 190 | continue; |
| 191 | } |
| 192 | |
| 193 | if (m_rptDesc.value[i] == 0x95) { |
Andrew de los Reyes | ec066ee | 2015-09-04 14:43:47 -0700 | [diff] [blame] | 194 | if (i + 1 >= m_rptDesc.size) |
| 195 | return; |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 196 | reportCount = m_rptDesc.value[++i]; |
| 197 | continue; |
| 198 | } |
| 199 | |
| 200 | if (m_rptDesc.value[i] == HID_REPORT_TYPE_INPUT) |
| 201 | hidReportType = HID_REPORT_TYPE_INPUT; |
| 202 | |
| 203 | if (m_rptDesc.value[i] == HID_REPORT_TYPE_OUTPUT) |
| 204 | hidReportType = HID_REPORT_TYPE_OUTPUT; |
| 205 | |
| 206 | if (m_rptDesc.value[i] == HID_REPORT_TYPE_FEATURE) { |
| 207 | hidReportType = HID_REPORT_TYPE_FEATURE; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
Andrew de los Reyes | ec066ee | 2015-09-04 14:43:47 -0700 | [diff] [blame] | 212 | if (i + 2 >= m_rptDesc.size) |
| 213 | return; |
Andrew Duggan | 8b77439 | 2014-06-18 13:11:49 -0700 | [diff] [blame] | 214 | if (m_rptDesc.value[i] == 0x06 && m_rptDesc.value[i + 1] == 0x00 |
| 215 | && m_rptDesc.value[i + 2] == 0xFF) { |
| 216 | isVendorSpecific = true; |
| 217 | i += 2; |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 222 | int HIDDevice::Read(unsigned short addr, unsigned char *buf, unsigned short len) |
| 223 | { |
Andrew Duggan | 64d6e59 | 2014-07-01 13:02:10 -0700 | [diff] [blame] | 224 | ssize_t count; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 225 | size_t bytesReadPerRequest; |
| 226 | size_t bytesInDataReport; |
| 227 | size_t totalBytesRead; |
| 228 | size_t bytesPerRequest; |
| 229 | size_t bytesWritten; |
| 230 | size_t bytesToRequest; |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 231 | int reportId; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 232 | int rc; |
| 233 | |
| 234 | if (!m_deviceOpen) |
| 235 | return -1; |
| 236 | |
| 237 | if (m_bytesPerReadRequest) |
| 238 | bytesPerRequest = m_bytesPerReadRequest; |
| 239 | else |
| 240 | bytesPerRequest = len; |
| 241 | |
| 242 | for (totalBytesRead = 0; totalBytesRead < len; totalBytesRead += bytesReadPerRequest) { |
| 243 | count = 0; |
| 244 | if ((len - totalBytesRead) < bytesPerRequest) |
| 245 | bytesToRequest = len % bytesPerRequest; |
| 246 | else |
| 247 | bytesToRequest = bytesPerRequest; |
| 248 | |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 249 | if (m_outputReportSize < HID_RMI4_READ_OUTPUT_COUNT + 2) { |
| 250 | return -1; |
| 251 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 252 | m_outputReport[HID_RMI4_REPORT_ID] = RMI_READ_ADDR_REPORT_ID; |
| 253 | m_outputReport[1] = 0; /* old 1 byte read count */ |
| 254 | m_outputReport[HID_RMI4_READ_OUTPUT_ADDR] = addr & 0xFF; |
| 255 | m_outputReport[HID_RMI4_READ_OUTPUT_ADDR + 1] = (addr >> 8) & 0xFF; |
| 256 | m_outputReport[HID_RMI4_READ_OUTPUT_COUNT] = bytesToRequest & 0xFF; |
| 257 | m_outputReport[HID_RMI4_READ_OUTPUT_COUNT + 1] = (bytesToRequest >> 8) & 0xFF; |
| 258 | |
| 259 | m_dataBytesRead = 0; |
| 260 | |
| 261 | for (bytesWritten = 0; bytesWritten < m_outputReportSize; bytesWritten += count) { |
| 262 | m_bCancel = false; |
| 263 | count = write(m_fd, m_outputReport + bytesWritten, |
| 264 | m_outputReportSize - bytesWritten); |
| 265 | if (count < 0) { |
| 266 | if (errno == EINTR && m_deviceOpen && !m_bCancel) |
| 267 | continue; |
| 268 | else |
| 269 | return count; |
| 270 | } |
| 271 | break; |
| 272 | } |
| 273 | |
| 274 | bytesReadPerRequest = 0; |
| 275 | while (bytesReadPerRequest < bytesToRequest) { |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 276 | rc = GetReport(&reportId); |
| 277 | if (rc > 0 && reportId == RMI_READ_DATA_REPORT_ID) { |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 278 | if (static_cast<ssize_t>(m_inputReportSize) < |
| 279 | std::max(HID_RMI4_READ_INPUT_COUNT, |
| 280 | HID_RMI4_READ_INPUT_DATA)) |
| 281 | return -1; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 282 | bytesInDataReport = m_readData[HID_RMI4_READ_INPUT_COUNT]; |
Andrew Duggan | edeea83 | 2015-09-10 13:13:08 -0700 | [diff] [blame] | 283 | if (bytesInDataReport > bytesToRequest |
| 284 | || bytesReadPerRequest + bytesInDataReport > len) |
Andrew de los Reyes | 3db4561 | 2015-09-04 14:54:34 -0700 | [diff] [blame] | 285 | return -1; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 286 | memcpy(buf + bytesReadPerRequest, &m_readData[HID_RMI4_READ_INPUT_DATA], |
| 287 | bytesInDataReport); |
| 288 | bytesReadPerRequest += bytesInDataReport; |
| 289 | m_dataBytesRead = 0; |
| 290 | } |
| 291 | } |
| 292 | addr += bytesPerRequest; |
| 293 | } |
| 294 | |
| 295 | return totalBytesRead; |
| 296 | } |
| 297 | |
| 298 | int HIDDevice::Write(unsigned short addr, const unsigned char *buf, unsigned short len) |
| 299 | { |
Andrew Duggan | 64d6e59 | 2014-07-01 13:02:10 -0700 | [diff] [blame] | 300 | ssize_t count; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 301 | |
| 302 | if (!m_deviceOpen) |
| 303 | return -1; |
| 304 | |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 305 | if (static_cast<ssize_t>(m_outputReportSize) < |
| 306 | HID_RMI4_WRITE_OUTPUT_DATA + len) |
| 307 | return -1; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 308 | m_outputReport[HID_RMI4_REPORT_ID] = RMI_WRITE_REPORT_ID; |
| 309 | m_outputReport[HID_RMI4_WRITE_OUTPUT_COUNT] = len; |
| 310 | m_outputReport[HID_RMI4_WRITE_OUTPUT_ADDR] = addr & 0xFF; |
| 311 | m_outputReport[HID_RMI4_WRITE_OUTPUT_ADDR + 1] = (addr >> 8) & 0xFF; |
| 312 | memcpy(&m_outputReport[HID_RMI4_WRITE_OUTPUT_DATA], buf, len); |
| 313 | |
| 314 | for (;;) { |
| 315 | m_bCancel = false; |
| 316 | count = write(m_fd, m_outputReport, m_outputReportSize); |
| 317 | if (count < 0) { |
| 318 | if (errno == EINTR && m_deviceOpen && !m_bCancel) |
| 319 | continue; |
| 320 | else |
| 321 | return count; |
| 322 | } |
Andrew Duggan | da82cd3 | 2015-09-10 15:23:38 -0700 | [diff] [blame] | 323 | return len; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 324 | } |
| 325 | } |
| 326 | |
| 327 | int HIDDevice::SetMode(int mode) |
| 328 | { |
| 329 | int rc; |
| 330 | char buf[2]; |
| 331 | |
| 332 | if (!m_deviceOpen) |
| 333 | return -1; |
| 334 | |
| 335 | buf[0] = 0xF; |
| 336 | buf[1] = mode; |
| 337 | rc = ioctl(m_fd, HIDIOCSFEATURE(2), buf); |
| 338 | if (rc < 0) { |
| 339 | perror("HIDIOCSFEATURE"); |
| 340 | return rc; |
| 341 | } |
| 342 | |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | void HIDDevice::Close() |
| 347 | { |
| 348 | if (!m_deviceOpen) |
| 349 | return; |
| 350 | |
| 351 | SetMode(HID_RMI4_MODE_MOUSE); |
| 352 | m_deviceOpen = false; |
| 353 | close(m_fd); |
| 354 | m_fd = -1; |
| 355 | |
| 356 | delete[] m_inputReport; |
| 357 | m_inputReport = NULL; |
| 358 | delete[] m_outputReport; |
| 359 | m_outputReport = NULL; |
| 360 | delete[] m_readData; |
| 361 | m_readData = NULL; |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 362 | delete[] m_attnData; |
| 363 | m_attnData = NULL; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 364 | } |
| 365 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 366 | int HIDDevice::WaitForAttention(struct timeval * timeout, unsigned int source_mask) |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 367 | { |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 368 | return GetAttentionReport(timeout, source_mask, NULL, NULL); |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 369 | } |
| 370 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 371 | int HIDDevice::GetAttentionReport(struct timeval * timeout, unsigned int source_mask, |
| 372 | unsigned char *buf, unsigned int *len) |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 373 | { |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 374 | int rc = 0; |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 375 | int reportId; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 376 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 377 | // Assume the Linux implementation of select with timeout set to the |
| 378 | // time remaining. |
| 379 | while (!timeout || (timeout->tv_sec != 0 || timeout->tv_usec != 0)) { |
| 380 | rc = GetReport(&reportId, timeout); |
| 381 | if (rc > 0) { |
| 382 | if (reportId == RMI_ATTN_REPORT_ID) { |
Andrew Duggan | 1595330 | 2015-09-10 14:16:50 -0700 | [diff] [blame] | 383 | // If a valid buffer is passed in then copy the data from |
| 384 | // the attention report into it. If the buffer is |
| 385 | // too small simply set *len to 0 to indicate nothing |
| 386 | // was copied. Some callers won't care about the contents |
| 387 | // of the report so failing to copy the data should not return |
| 388 | // an error. |
| 389 | if (buf && len) { |
| 390 | if (*len >= m_inputReportSize) { |
| 391 | *len = m_inputReportSize; |
| 392 | memcpy(buf, m_attnData, *len); |
| 393 | } else { |
| 394 | *len = 0; |
| 395 | } |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 396 | } |
Andrew Duggan | 1595330 | 2015-09-10 14:16:50 -0700 | [diff] [blame] | 397 | |
| 398 | if (m_inputReportSize < HID_RMI4_ATTN_INTERUPT_SOURCES + 1) |
| 399 | return -1; |
| 400 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 401 | if (source_mask & m_attnData[HID_RMI4_ATTN_INTERUPT_SOURCES]) |
| 402 | return rc; |
| 403 | } |
| 404 | } else { |
| 405 | return rc; |
| 406 | } |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 407 | } |
| 408 | |
| 409 | return rc; |
| 410 | } |
| 411 | |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 412 | int HIDDevice::GetReport(int *reportId, struct timeval * timeout) |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 413 | { |
Andrew Duggan | 64d6e59 | 2014-07-01 13:02:10 -0700 | [diff] [blame] | 414 | ssize_t count = 0; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 415 | fd_set fds; |
| 416 | int rc; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 417 | |
| 418 | if (!m_deviceOpen) |
| 419 | return -1; |
| 420 | |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 421 | if (m_inputReportSize < HID_RMI4_REPORT_ID + 1) |
| 422 | return -1; |
| 423 | |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 424 | for (;;) { |
| 425 | FD_ZERO(&fds); |
| 426 | FD_SET(m_fd, &fds); |
| 427 | |
| 428 | rc = select(m_fd + 1, &fds, NULL, NULL, timeout); |
| 429 | if (rc == 0) { |
| 430 | return -ETIMEDOUT; |
| 431 | } else if (rc < 0) { |
| 432 | if (errno == EINTR && m_deviceOpen && !m_bCancel) |
| 433 | continue; |
| 434 | else |
| 435 | return rc; |
| 436 | } else if (rc > 0 && FD_ISSET(m_fd, &fds)) { |
| 437 | size_t offset = 0; |
| 438 | for (;;) { |
| 439 | m_bCancel = false; |
| 440 | count = read(m_fd, m_inputReport + offset, m_inputReportSize - offset); |
| 441 | if (count < 0) { |
| 442 | if (errno == EINTR && m_deviceOpen && !m_bCancel) |
| 443 | continue; |
| 444 | else |
| 445 | return count; |
| 446 | } |
| 447 | offset += count; |
| 448 | if (offset == m_inputReportSize) |
| 449 | break; |
| 450 | } |
Andrew de los Reyes | 5f61728 | 2015-09-04 14:57:30 -0700 | [diff] [blame] | 451 | count = offset; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 452 | } |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 453 | break; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 454 | } |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 455 | |
| 456 | if (reportId) |
| 457 | *reportId = m_inputReport[HID_RMI4_REPORT_ID]; |
| 458 | |
| 459 | if (m_inputReport[HID_RMI4_REPORT_ID] == RMI_ATTN_REPORT_ID) { |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 460 | if (static_cast<ssize_t>(m_inputReportSize) < count) |
| 461 | return -1; |
Andrew de los Reyes | 5f61728 | 2015-09-04 14:57:30 -0700 | [diff] [blame] | 462 | memcpy(m_attnData, m_inputReport, count); |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 463 | } else if (m_inputReport[HID_RMI4_REPORT_ID] == RMI_READ_DATA_REPORT_ID) { |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 464 | if (static_cast<ssize_t>(m_inputReportSize) < count) |
| 465 | return -1; |
Andrew de los Reyes | 5f61728 | 2015-09-04 14:57:30 -0700 | [diff] [blame] | 466 | memcpy(m_readData, m_inputReport, count); |
| 467 | m_dataBytesRead = count; |
Andrew Duggan | f73fdc7 | 2014-11-09 11:02:22 -0800 | [diff] [blame] | 468 | } |
| 469 | return 1; |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | void HIDDevice::PrintReport(const unsigned char *report) |
| 473 | { |
| 474 | int i; |
| 475 | int len = 0; |
| 476 | const unsigned char * data; |
| 477 | int addr = 0; |
| 478 | |
| 479 | switch (report[HID_RMI4_REPORT_ID]) { |
| 480 | case RMI_WRITE_REPORT_ID: |
| 481 | len = report[HID_RMI4_WRITE_OUTPUT_COUNT]; |
| 482 | data = &report[HID_RMI4_WRITE_OUTPUT_DATA]; |
| 483 | addr = (report[HID_RMI4_WRITE_OUTPUT_ADDR] & 0xFF) |
| 484 | | ((report[HID_RMI4_WRITE_OUTPUT_ADDR + 1] & 0xFF) << 8); |
| 485 | fprintf(stdout, "Write Report:\n"); |
| 486 | fprintf(stdout, "Address = 0x%02X\n", addr); |
| 487 | fprintf(stdout, "Length = 0x%02X\n", len); |
| 488 | break; |
| 489 | case RMI_READ_ADDR_REPORT_ID: |
| 490 | addr = (report[HID_RMI4_READ_OUTPUT_ADDR] & 0xFF) |
| 491 | | ((report[HID_RMI4_READ_OUTPUT_ADDR + 1] & 0xFF) << 8); |
| 492 | len = (report[HID_RMI4_READ_OUTPUT_COUNT] & 0xFF) |
| 493 | | ((report[HID_RMI4_READ_OUTPUT_COUNT + 1] & 0xFF) << 8); |
| 494 | fprintf(stdout, "Read Request (Output Report):\n"); |
| 495 | fprintf(stdout, "Address = 0x%02X\n", addr); |
| 496 | fprintf(stdout, "Length = 0x%02X\n", len); |
| 497 | return; |
| 498 | break; |
| 499 | case RMI_READ_DATA_REPORT_ID: |
| 500 | len = report[HID_RMI4_READ_INPUT_COUNT]; |
| 501 | data = &report[HID_RMI4_READ_INPUT_DATA]; |
| 502 | fprintf(stdout, "Read Data Report:\n"); |
| 503 | fprintf(stdout, "Length = 0x%02X\n", len); |
| 504 | break; |
| 505 | case RMI_ATTN_REPORT_ID: |
| 506 | fprintf(stdout, "Attention Report:\n"); |
| 507 | len = 28; |
| 508 | data = &report[HID_RMI4_ATTN_DATA]; |
| 509 | fprintf(stdout, "Interrupt Sources: 0x%02X\n", |
| 510 | report[HID_RMI4_ATTN_INTERUPT_SOURCES]); |
| 511 | break; |
| 512 | default: |
| 513 | fprintf(stderr, "Unknown Report: ID 0x%02x\n", report[HID_RMI4_REPORT_ID]); |
| 514 | return; |
| 515 | } |
| 516 | |
| 517 | fprintf(stdout, "Data:\n"); |
| 518 | for (i = 0; i < len; ++i) { |
| 519 | fprintf(stdout, "0x%02X ", data[i]); |
| 520 | if (i % 8 == 7) { |
| 521 | fprintf(stdout, "\n"); |
| 522 | } |
| 523 | } |
| 524 | fprintf(stdout, "\n\n"); |
Andrew Duggan | 64d6e59 | 2014-07-01 13:02:10 -0700 | [diff] [blame] | 525 | } |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 526 | |
Andrew Duggan | 2c24adb | 2015-05-06 18:18:06 -0700 | [diff] [blame] | 527 | // Print protocol specific device information |
| 528 | void HIDDevice::PrintDeviceInfo() |
| 529 | { |
| 530 | fprintf(stdout, "HID device info:\nBus: %s Vendor: 0x%04x Product: 0x%04x\n", |
| 531 | m_info.bustype == BUS_I2C ? "I2C" : "USB", m_info.vendor, m_info.product); |
Andrew Duggan | b6302c3 | 2015-05-07 11:07:22 -0700 | [diff] [blame] | 532 | fprintf(stdout, "Report sizes: input: %ld output: %ld\n", (unsigned long)m_inputReportSize, |
| 533 | (unsigned long)m_outputReportSize); |
Andrew Duggan | 2c24adb | 2015-05-06 18:18:06 -0700 | [diff] [blame] | 534 | } |
| 535 | |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 536 | bool WriteDeviceNameToFile(const char * file, const char * str) |
| 537 | { |
| 538 | int fd; |
| 539 | ssize_t size; |
| 540 | |
| 541 | fd = open(file, O_WRONLY); |
| 542 | if (fd < 0) |
| 543 | return false; |
| 544 | |
| 545 | for (;;) { |
Andrew de los Reyes | cf0d733 | 2015-09-04 15:21:42 -0700 | [diff] [blame] | 546 | size = write(fd, str, strlen(str)); |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 547 | if (size < 0) { |
| 548 | if (errno == EINTR) |
| 549 | continue; |
| 550 | |
| 551 | return false; |
| 552 | } |
| 553 | break; |
| 554 | } |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 555 | |
Andrew de los Reyes | cf0d733 | 2015-09-04 15:21:42 -0700 | [diff] [blame] | 556 | return close(fd) == 0 && size == static_cast<ssize_t>(strlen(str)); |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | void HIDDevice::RebindDriver() |
| 560 | { |
| 561 | int bus = m_info.bustype; |
| 562 | int vendor = m_info.vendor; |
| 563 | int product = m_info.product; |
| 564 | std::string hidDeviceName; |
| 565 | std::string transportDeviceName; |
| 566 | std::string driverPath; |
| 567 | std::string bindFile; |
| 568 | std::string unbindFile; |
| 569 | std::string hidrawFile; |
Andrew Duggan | 40eb2d7 | 2015-10-16 12:33:29 -0700 | [diff] [blame] | 570 | struct stat stat_buf; |
| 571 | int rc; |
| 572 | int i; |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 573 | |
| 574 | Close(); |
| 575 | |
| 576 | if (!LookupHidDeviceName(bus, vendor, product, hidDeviceName)) { |
| 577 | fprintf(stderr, "Failed to find HID device name for the specified device: bus (0x%x) vendor: (0x%x) product: (0x%x)\n", |
| 578 | bus, vendor, product); |
| 579 | return; |
| 580 | } |
| 581 | |
Andrew Duggan | b6302c3 | 2015-05-07 11:07:22 -0700 | [diff] [blame] | 582 | if (!FindTransportDevice(bus, hidDeviceName, transportDeviceName, driverPath)) { |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 583 | fprintf(stderr, "Failed to find the transport device / driver for %s\n", hidDeviceName.c_str()); |
| 584 | return; |
| 585 | } |
| 586 | |
| 587 | bindFile = driverPath + "bind"; |
| 588 | unbindFile = driverPath + "unbind"; |
| 589 | |
| 590 | if (!WriteDeviceNameToFile(unbindFile.c_str(), transportDeviceName.c_str())) { |
| 591 | fprintf(stderr, "Failed to unbind HID device %s: %s\n", |
| 592 | transportDeviceName.c_str(), strerror(errno)); |
| 593 | return; |
| 594 | } |
| 595 | |
| 596 | if (!WriteDeviceNameToFile(bindFile.c_str(), transportDeviceName.c_str())) { |
| 597 | fprintf(stderr, "Failed to bind HID device %s: %s\n", |
| 598 | transportDeviceName.c_str(), strerror(errno)); |
| 599 | return; |
| 600 | } |
| 601 | |
Andrew Duggan | b6302c3 | 2015-05-07 11:07:22 -0700 | [diff] [blame] | 602 | // The hid device id has changed since this is now a new hid device. Now we have to look up the new name. |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 603 | if (!LookupHidDeviceName(bus, vendor, product, hidDeviceName)) { |
| 604 | fprintf(stderr, "Failed to find HID device name for the specified device: bus (0x%x) vendor: (0x%x) product: (0x%x)\n", |
| 605 | bus, vendor, product); |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | if (!FindHidRawFile(hidDeviceName, hidrawFile)) { |
| 610 | fprintf(stderr, "Failed to find the hidraw device file for %s\n", hidDeviceName.c_str()); |
| 611 | return; |
| 612 | } |
| 613 | |
Andrew Duggan | 40eb2d7 | 2015-10-16 12:33:29 -0700 | [diff] [blame] | 614 | for (i = 0; i < 200; i++) { |
| 615 | rc = stat(hidrawFile.c_str(), &stat_buf); |
| 616 | if (!rc) |
| 617 | break; |
| 618 | Sleep(5); |
| 619 | } |
| 620 | |
| 621 | rc = Open(hidrawFile.c_str()); |
| 622 | if (rc) |
| 623 | fprintf(stderr, "Failed to open device (%s) during rebind: %d: errno: %s (%d)\n", |
| 624 | hidrawFile.c_str(), rc, strerror(errno), errno); |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 625 | } |
| 626 | |
Andrew Duggan | b6302c3 | 2015-05-07 11:07:22 -0700 | [diff] [blame] | 627 | bool HIDDevice::FindTransportDevice(int bus, std::string & hidDeviceName, |
Andrew Duggan | bef9c2d | 2015-05-06 17:45:48 -0700 | [diff] [blame] | 628 | std::string & transportDeviceName, std::string & driverPath) |
| 629 | { |
| 630 | std::string devicePrefix = "/sys/bus/"; |
| 631 | std::string devicePath; |
| 632 | struct dirent * devicesDirEntry; |
| 633 | DIR * devicesDir; |
| 634 | struct dirent * devDirEntry; |
| 635 | DIR * devDir; |
| 636 | bool deviceFound = false; |
| 637 | ssize_t sz; |
| 638 | |
| 639 | if (bus == BUS_I2C) { |
| 640 | devicePrefix += "i2c/"; |
| 641 | driverPath = devicePrefix + "drivers/i2c_hid/"; |
| 642 | } else { |
| 643 | devicePrefix += "usb/"; |
| 644 | driverPath = devicePrefix + "drivers/usbhid/"; |
| 645 | } |
| 646 | devicePath = devicePrefix + "devices/"; |
| 647 | |
| 648 | devicesDir = opendir(devicePath.c_str()); |
| 649 | if (!devicesDir) |
| 650 | return false; |
| 651 | |
| 652 | while((devicesDirEntry = readdir(devicesDir)) != NULL) { |
| 653 | if (devicesDirEntry->d_type != DT_LNK) |
| 654 | continue; |
| 655 | |
| 656 | char buf[PATH_MAX]; |
| 657 | |
| 658 | sz = readlinkat(dirfd(devicesDir), devicesDirEntry->d_name, buf, PATH_MAX); |
| 659 | if (sz < 0) |
| 660 | continue; |
| 661 | |
| 662 | buf[sz] = 0; |
| 663 | |
| 664 | std::string fullLinkPath = devicePath + buf; |
| 665 | devDir = opendir(fullLinkPath.c_str()); |
| 666 | if (!devDir) { |
| 667 | fprintf(stdout, "opendir failed\n"); |
| 668 | continue; |
| 669 | } |
| 670 | |
| 671 | while ((devDirEntry = readdir(devDir)) != NULL) { |
| 672 | if (!strcmp(devDirEntry->d_name, hidDeviceName.c_str())) { |
| 673 | transportDeviceName = devicesDirEntry->d_name; |
| 674 | deviceFound = true; |
| 675 | break; |
| 676 | } |
| 677 | } |
| 678 | closedir(devDir); |
| 679 | |
| 680 | if (deviceFound) |
| 681 | break; |
| 682 | } |
| 683 | closedir(devicesDir); |
| 684 | |
| 685 | return deviceFound; |
| 686 | } |
| 687 | |
| 688 | bool HIDDevice::LookupHidDeviceName(int bus, int vendorId, int productId, std::string & deviceName) |
| 689 | { |
| 690 | bool ret = false; |
| 691 | struct dirent * devDirEntry; |
| 692 | DIR * devDir; |
| 693 | char devicePrefix[15]; |
| 694 | |
| 695 | snprintf(devicePrefix, 15, "%04X:%04X:%04X", bus, vendorId, productId); |
| 696 | |
| 697 | devDir = opendir("/sys/bus/hid/devices"); |
| 698 | if (!devDir) |
| 699 | return false; |
| 700 | |
| 701 | while ((devDirEntry = readdir(devDir)) != NULL) { |
| 702 | if (!strncmp(devDirEntry->d_name, devicePrefix, 14)) { |
| 703 | deviceName = devDirEntry->d_name; |
| 704 | ret = true; |
| 705 | break; |
| 706 | } |
| 707 | } |
| 708 | closedir(devDir); |
| 709 | |
| 710 | return ret; |
| 711 | } |
| 712 | |
| 713 | bool HIDDevice::FindHidRawFile(std::string & deviceName, std::string & hidrawFile) |
| 714 | { |
| 715 | bool ret = false; |
| 716 | char hidrawDir[PATH_MAX]; |
| 717 | struct dirent * devDirEntry; |
| 718 | DIR * devDir; |
| 719 | |
| 720 | snprintf(hidrawDir, PATH_MAX, "/sys/bus/hid/devices/%s/hidraw", deviceName.c_str()); |
| 721 | |
| 722 | devDir = opendir(hidrawDir); |
| 723 | if (!devDir) |
| 724 | return false; |
| 725 | |
| 726 | while ((devDirEntry = readdir(devDir)) != NULL) { |
| 727 | if (!strncmp(devDirEntry->d_name, "hidraw", 6)) { |
| 728 | hidrawFile = std::string("/dev/") + devDirEntry->d_name; |
| 729 | ret = true; |
| 730 | break; |
| 731 | } |
| 732 | } |
| 733 | closedir(devDir); |
| 734 | |
| 735 | return ret; |
Andrew de los Reyes | 242ea83 | 2015-09-04 14:40:06 -0700 | [diff] [blame] | 736 | } |