Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/hid/hms.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2020 Vladimir Kondratyev <wulf@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * HID spec: https://www.usb.org/sites/default/files/documents/hid1_11.pdf 33 */ 34 35 #include "opt_hid.h" 36 37 #include <sys/param.h> 38 #include <sys/bus.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/sysctl.h> 43 44 #include <dev/evdev/input.h> 45 #include <dev/evdev/evdev.h> 46 47 #include <dev/hid/hid.h> 48 #include <dev/hid/hidbus.h> 49 #include <dev/hid/hidmap.h> 50 #include <dev/hid/hidquirk.h> 51 #include <dev/hid/hidrdesc.h> 52 53 static const uint8_t hms_boot_desc[] = { HID_MOUSE_BOOTPROTO_DESCR() }; 54 55 enum { 56 HMS_REL_X, 57 HMS_REL_Y, 58 HMS_REL_Z, 59 HMS_ABS_X, 60 HMS_ABS_Y, 61 HMS_ABS_Z, 62 HMS_HWHEEL, 63 HMS_BTN, 64 HMS_BTN_MS1, 65 HMS_BTN_MS2, 66 HMS_FINAL_CB, 67 }; 68 69 static hidmap_cb_t hms_final_cb; 70 #ifdef IICHID_SAMPLING 71 static hid_intr_t hms_intr; 72 #endif 73 74 #define HMS_MAP_BUT_RG(usage_from, usage_to, code) \ 75 { HIDMAP_KEY_RANGE(HUP_BUTTON, usage_from, usage_to, code) } 76 #define HMS_MAP_BUT_MS(usage, code) \ 77 { HIDMAP_KEY(HUP_MICROSOFT, usage, code) } 78 #define HMS_MAP_ABS(usage, code) \ 79 { HIDMAP_ABS(HUP_GENERIC_DESKTOP, usage, code) } 80 #define HMS_MAP_REL(usage, code) \ 81 { HIDMAP_REL(HUP_GENERIC_DESKTOP, usage, code) } 82 #define HMS_MAP_REL_REV(usage, code) \ 83 { HIDMAP_REL(HUP_GENERIC_DESKTOP, usage, code), .invert_value = true } 84 #define HMS_MAP_REL_CN(usage, code) \ 85 { HIDMAP_REL(HUP_CONSUMER, usage, code) } 86 #define HMS_FINAL_CB(cb) \ 87 { HIDMAP_FINAL_CB(&cb) } 88 89 static const struct hidmap_item hms_map[] = { 90 [HMS_REL_X] = HMS_MAP_REL(HUG_X, REL_X), 91 [HMS_REL_Y] = HMS_MAP_REL(HUG_Y, REL_Y), 92 [HMS_REL_Z] = HMS_MAP_REL(HUG_Z, REL_Z), 93 [HMS_ABS_X] = HMS_MAP_ABS(HUG_X, ABS_X), 94 [HMS_ABS_Y] = HMS_MAP_ABS(HUG_Y, ABS_Y), 95 [HMS_ABS_Z] = HMS_MAP_ABS(HUG_Z, ABS_Z), 96 [HMS_HWHEEL] = HMS_MAP_REL_CN(HUC_AC_PAN, REL_HWHEEL), 97 [HMS_BTN] = HMS_MAP_BUT_RG(1, 16, BTN_MOUSE), 98 [HMS_BTN_MS1] = HMS_MAP_BUT_MS(1, BTN_RIGHT), 99 [HMS_BTN_MS2] = HMS_MAP_BUT_MS(2, BTN_MIDDLE), 100 [HMS_FINAL_CB] = HMS_FINAL_CB(hms_final_cb), 101 }; 102 103 static const struct hidmap_item hms_map_wheel[] = { 104 HMS_MAP_REL(HUG_WHEEL, REL_WHEEL), 105 }; 106 static const struct hidmap_item hms_map_wheel_rev[] = { 107 HMS_MAP_REL_REV(HUG_WHEEL, REL_WHEEL), 108 }; 109 110 /* A match on these entries will load hms */ 111 static const struct hid_device_id hms_devs[] = { 112 { HID_TLC(HUP_GENERIC_DESKTOP, HUG_MOUSE) }, 113 }; 114 115 struct hms_softc { 116 struct hidmap hm; 117 HIDMAP_CAPS(caps, hms_map); 118 #ifdef IICHID_SAMPLING 119 bool iichid_sampling; 120 void *last_ir; 121 hid_size_t last_irsize; 122 hid_size_t isize; 123 uint32_t drift_cnt; 124 uint32_t drift_thresh; 125 #endif 126 }; 127 128 #ifdef IICHID_SAMPLING 129 static void 130 hms_intr(void *context, void *buf, hid_size_t len) 131 { 132 struct hidmap *hm = context; 133 struct hms_softc *sc = device_get_softc(hm->dev); 134 135 if (len > sc->isize) 136 len = sc->isize; 137 138 /* 139 * Many I2C "compatibility" mouse devices found on touchpads continue 140 * to return last report data in sampling mode even after touch has 141 * been ended. That results in cursor drift. Filter out such a 142 * reports through comparing with previous one. 143 */ 144 if (len == sc->last_irsize && memcmp(buf, sc->last_ir, len) == 0) { 145 sc->drift_cnt++; 146 if (sc->drift_thresh != 0 && sc->drift_cnt >= sc->drift_thresh) 147 return; 148 } else { 149 sc->drift_cnt = 0; 150 sc->last_irsize = len; 151 bcopy(buf, sc->last_ir, len); 152 } 153 154 hidmap_intr(context, buf, len); 155 } 156 #endif 157 158 static int 159 hms_final_cb(HIDMAP_CB_ARGS) 160 { 161 struct hms_softc *sc = HIDMAP_CB_GET_SOFTC(); 162 struct evdev_dev *evdev = HIDMAP_CB_GET_EVDEV(); 163 164 if (HIDMAP_CB_GET_STATE() == HIDMAP_CB_IS_ATTACHING) { 165 if (hidmap_test_cap(sc->caps, HMS_ABS_X) || 166 hidmap_test_cap(sc->caps, HMS_ABS_Y)) 167 evdev_support_prop(evdev, INPUT_PROP_DIRECT); 168 else 169 evdev_support_prop(evdev, INPUT_PROP_POINTER); 170 #ifdef IICHID_SAMPLING 171 /* Overload interrupt handler to skip identical reports */ 172 if (sc->iichid_sampling) 173 hidbus_set_intr(sc->hm.dev, hms_intr, &sc->hm); 174 #endif 175 } 176 177 /* Do not execute callback at interrupt handler and detach */ 178 return (ENOSYS); 179 } 180 181 static void 182 hms_identify(driver_t *driver, device_t parent) 183 { 184 const struct hid_device_info *hw = hid_get_device_info(parent); 185 void *d_ptr; 186 hid_size_t d_len; 187 int error; 188 189 /* 190 * If device claimed boot protocol support but do not have report 191 * descriptor, load one defined in "Appendix B.2" of HID1_11.pdf 192 */ 193 error = hid_get_report_descr(parent, &d_ptr, &d_len); 194 if ((error != 0 && hid_test_quirk(hw, HQ_HAS_MS_BOOTPROTO)) || 195 (error == 0 && hid_test_quirk(hw, HQ_MS_BOOTPROTO) && 196 hid_is_mouse(d_ptr, d_len))) 197 (void)hid_set_report_descr(parent, hms_boot_desc, 198 sizeof(hms_boot_desc)); 199 } 200 201 static int 202 hms_probe(device_t dev) 203 { 204 struct hms_softc *sc = device_get_softc(dev); 205 int error; 206 207 error = HIDBUS_LOOKUP_DRIVER_INFO(dev, hms_devs); 208 if (error != 0) 209 return (error); 210 211 hidmap_set_dev(&sc->hm, dev); 212 213 /* Check if report descriptor belongs to mouse */ 214 error = HIDMAP_ADD_MAP(&sc->hm, hms_map, sc->caps); 215 if (error != 0) 216 return (error); 217 218 /* There should be at least one X or Y axis */ 219 if (!hidmap_test_cap(sc->caps, HMS_REL_X) && 220 !hidmap_test_cap(sc->caps, HMS_REL_X) && 221 !hidmap_test_cap(sc->caps, HMS_ABS_X) && 222 !hidmap_test_cap(sc->caps, HMS_ABS_Y)) 223 return (ENXIO); 224 225 if (hidmap_test_cap(sc->caps, HMS_ABS_X) || 226 hidmap_test_cap(sc->caps, HMS_ABS_Y)) 227 hidbus_set_desc(dev, "Tablet"); 228 else 229 hidbus_set_desc(dev, "Mouse"); 230 231 return (BUS_PROBE_DEFAULT); 232 } 233 234 static int 235 hms_attach(device_t dev) 236 { 237 struct hms_softc *sc = device_get_softc(dev); 238 const struct hid_device_info *hw = hid_get_device_info(dev); 239 struct hidmap_hid_item *hi; 240 HIDMAP_CAPS(cap_wheel, hms_map_wheel); 241 void *d_ptr; 242 hid_size_t d_len; 243 bool set_report_proto; 244 int error, nbuttons = 0; 245 246 /* 247 * Set the report (non-boot) protocol if report descriptor has not been 248 * overloaded with boot protocol report descriptor. 249 * 250 * Mice without boot protocol support may choose not to implement 251 * Set_Protocol at all; Ignore any error. 252 */ 253 error = hid_get_report_descr(dev, &d_ptr, &d_len); 254 set_report_proto = !(error == 0 && d_len == sizeof(hms_boot_desc) && 255 memcmp(d_ptr, hms_boot_desc, sizeof(hms_boot_desc)) == 0); 256 (void)hid_set_protocol(dev, set_report_proto ? 1 : 0); 257 258 if (hid_test_quirk(hw, HQ_MS_REVZ)) 259 HIDMAP_ADD_MAP(&sc->hm, hms_map_wheel_rev, cap_wheel); 260 else 261 HIDMAP_ADD_MAP(&sc->hm, hms_map_wheel, cap_wheel); 262 263 #ifdef IICHID_SAMPLING 264 if (hid_test_quirk(hw, HQ_IICHID_SAMPLING) && 265 hidmap_test_cap(sc->caps, HMS_REL_X) && 266 hidmap_test_cap(sc->caps, HMS_REL_Y)) { 267 sc->iichid_sampling = true; 268 sc->isize = hid_report_size_max(d_ptr, d_len, hid_input, NULL); 269 sc->last_ir = malloc(sc->isize, M_DEVBUF, M_WAITOK | M_ZERO); 270 sc->drift_thresh = 2; 271 SYSCTL_ADD_U32(device_get_sysctl_ctx(dev), 272 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 273 "drift_thresh", CTLFLAG_RW, &sc->drift_thresh, 0, 274 "drift detection threshhold"); 275 } 276 #endif 277 278 error = hidmap_attach(&sc->hm); 279 if (error) 280 return (error); 281 282 /* Count number of input usages of variable type mapped to buttons */ 283 for (hi = sc->hm.hid_items; 284 hi < sc->hm.hid_items + sc->hm.nhid_items; 285 hi++) 286 if (hi->type == HIDMAP_TYPE_VARIABLE && hi->evtype == EV_KEY) 287 nbuttons++; 288 289 /* announce information about the mouse */ 290 device_printf(dev, "%d buttons and [%s%s%s%s%s] coordinates ID=%u\n", 291 nbuttons, 292 (hidmap_test_cap(sc->caps, HMS_REL_X) || 293 hidmap_test_cap(sc->caps, HMS_ABS_X)) ? "X" : "", 294 (hidmap_test_cap(sc->caps, HMS_REL_Y) || 295 hidmap_test_cap(sc->caps, HMS_ABS_Y)) ? "Y" : "", 296 (hidmap_test_cap(sc->caps, HMS_REL_Z) || 297 hidmap_test_cap(sc->caps, HMS_ABS_Z)) ? "Z" : "", 298 hidmap_test_cap(cap_wheel, 0) ? "W" : "", 299 hidmap_test_cap(sc->caps, HMS_HWHEEL) ? "H" : "", 300 sc->hm.hid_items[0].id); 301 302 return (0); 303 } 304 305 static int 306 hms_detach(device_t dev) 307 { 308 struct hms_softc *sc = device_get_softc(dev); 309 int error; 310 311 error = hidmap_detach(&sc->hm); 312 #ifdef IICHID_SAMPLING 313 if (error == 0) 314 free(sc->last_ir, M_DEVBUF); 315 #endif 316 return (error); 317 } 318 319 static devclass_t hms_devclass; 320 static device_method_t hms_methods[] = { 321 DEVMETHOD(device_identify, hms_identify), 322 DEVMETHOD(device_probe, hms_probe), 323 DEVMETHOD(device_attach, hms_attach), 324 DEVMETHOD(device_detach, hms_detach), 325 326 DEVMETHOD_END 327 }; 328 329 DEFINE_CLASS_0(hms, hms_driver, hms_methods, sizeof(struct hms_softc)); 330 DRIVER_MODULE(hms, hidbus, hms_driver, hms_devclass, NULL, 0); 331 MODULE_DEPEND(hms, hid, 1, 1, 1); 332 MODULE_DEPEND(hms, hidbus, 1, 1, 1); 333 MODULE_DEPEND(hms, hidmap, 1, 1, 1); 334 MODULE_DEPEND(hms, evdev, 1, 1, 1); 335 MODULE_VERSION(hms, 1); 336 HID_PNP_INFO(hms_devs);
Cache object: e26fce72aa8c999ecfaf3686a6627fda
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