| File: | dev/usb/uoakrh.c |
| Warning: | line 247, column 2 Value stored to 'frame' is never read |
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| 1 | /* $OpenBSD: uoakrh.c,v 1.19 2022/04/09 20:09:03 naddy Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2012 Yojiro UO <yuo@nui.org> |
| 5 | * |
| 6 | * Permission to use, copy, modify, and distribute this software for any |
| 7 | * purpose with or without fee is hereby granted, provided that the above |
| 8 | * copyright notice and this permission notice appear in all copies. |
| 9 | * |
| 10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCAIMS ALL WARRANTIES |
| 11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 17 | */ |
| 18 | |
| 19 | /* TORADEX OAK series sensors: Temperature/Humidity sensor driver */ |
| 20 | /* http://developer.toradex.com/files/toradex-dev/uploads/media/Oak/Oak_ProgrammingGuide.pdf */ |
| 21 | |
| 22 | #include <sys/param.h> |
| 23 | #include <sys/systm.h> |
| 24 | #include <sys/kernel.h> |
| 25 | #include <sys/malloc.h> |
| 26 | #include <sys/device.h> |
| 27 | #include <sys/conf.h> |
| 28 | #include <sys/sensors.h> |
| 29 | |
| 30 | #include <dev/usb/usb.h> |
| 31 | #include <dev/usb/usbhid.h> |
| 32 | #include <dev/usb/usbdi.h> |
| 33 | #include <dev/usb/usbdevs.h> |
| 34 | #include <dev/usb/uhidev.h> |
| 35 | |
| 36 | #include "uoak.h" |
| 37 | |
| 38 | #ifdef OARKRH_DEBUG |
| 39 | int uoakrhdebug = 0; |
| 40 | #define DPRINTFN(n, x) do { if (uoakrhdebug > (n)) printf x; } while (0) |
| 41 | #else |
| 42 | #define DPRINTFN(n, x) |
| 43 | #endif |
| 44 | |
| 45 | #define DPRINTF(x) DPRINTFN(0, x) |
| 46 | |
| 47 | #define UOAKRH_SAMPLE_RATE200 200 /* ms */ |
| 48 | #define UOAKRH_REFRESH_PERIOD10 10 /* 10 sec : 0.1Hz */ |
| 49 | |
| 50 | struct uoakrh_sensor { |
| 51 | struct ksensor temp; |
| 52 | struct ksensor humi; |
| 53 | int count; |
| 54 | int tempval, humival; |
| 55 | int resolution; |
| 56 | }; |
| 57 | |
| 58 | struct uoakrh_softc { |
| 59 | struct uhidev sc_hdev; |
| 60 | |
| 61 | /* uoak common */ |
| 62 | struct uoak_softc sc_uoak_softc; |
| 63 | |
| 64 | /* sensor framework */ |
| 65 | struct uoakrh_sensor sc_sensor; |
| 66 | struct ksensordev sc_sensordev; |
| 67 | struct sensor_task *sc_sensortask; |
| 68 | |
| 69 | /* sensor setting */ |
| 70 | int sc_rh_heater; |
| 71 | }; |
| 72 | |
| 73 | const struct usb_devno uoakrh_devs[] = { |
| 74 | { USB_VENDOR_TORADEX0x1b67, USB_PRODUCT_TORADEX_RH0x0001}, |
| 75 | }; |
| 76 | #define uoakrh_lookup(v, p)usbd_match_device((const struct usb_devno *)(uoakrh_devs), sizeof (uoakrh_devs) / sizeof ((uoakrh_devs)[0]), sizeof ((uoakrh_devs )[0]), (v), (p)) usb_lookup(uoakrh_devs, v, p)usbd_match_device((const struct usb_devno *)(uoakrh_devs), sizeof (uoakrh_devs) / sizeof ((uoakrh_devs)[0]), sizeof ((uoakrh_devs )[0]), (v), (p)) |
| 77 | |
| 78 | int uoakrh_match(struct device *, void *, void *); |
| 79 | void uoakrh_attach(struct device *, struct device *, void *); |
| 80 | int uoakrh_detach(struct device *, int); |
| 81 | |
| 82 | void uoakrh_intr(struct uhidev *, void *, u_int); |
| 83 | void uoakrh_refresh(void *); |
| 84 | |
| 85 | int uoakrh_get_sensor_setting(struct uoakrh_softc *, enum uoak_target); |
| 86 | |
| 87 | void uoakrh_dev_setting(void *, enum uoak_target); |
| 88 | void uoakrh_dev_print(void *, enum uoak_target); |
| 89 | |
| 90 | |
| 91 | struct cfdriver uoakrh_cd = { |
| 92 | NULL((void *)0), "uoakrh", DV_DULL |
| 93 | }; |
| 94 | |
| 95 | const struct cfattach uoakrh_ca = { |
| 96 | sizeof(struct uoakrh_softc), |
| 97 | uoakrh_match, |
| 98 | uoakrh_attach, |
| 99 | uoakrh_detach, |
| 100 | }; |
| 101 | |
| 102 | const struct uoak_methods uoakrh_methods = { |
| 103 | uoakrh_dev_print, |
| 104 | uoakrh_dev_setting |
| 105 | }; |
| 106 | |
| 107 | |
| 108 | int |
| 109 | uoakrh_match(struct device *parent, void *match, void *aux) |
| 110 | { |
| 111 | struct uhidev_attach_arg *uha = aux; |
| 112 | |
| 113 | if (UHIDEV_CLAIM_MULTIPLE_REPORTID(uha)((uha)->claimed != ((void *)0))) |
| 114 | return (UMATCH_NONE0); |
| 115 | |
| 116 | if (uoakrh_lookup(uha->uaa->vendor, uha->uaa->product)usbd_match_device((const struct usb_devno *)(uoakrh_devs), sizeof (uoakrh_devs) / sizeof ((uoakrh_devs)[0]), sizeof ((uoakrh_devs )[0]), (uha->uaa->vendor), (uha->uaa->product)) == NULL((void *)0)) |
| 117 | return UMATCH_NONE0; |
| 118 | |
| 119 | return (UMATCH_VENDOR_PRODUCT13); |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | uoakrh_attach(struct device *parent, struct device *self, void *aux) |
| 124 | { |
| 125 | struct uoakrh_softc *sc = (struct uoakrh_softc *)self; |
| 126 | struct usb_attach_arg *uaa = aux; |
| 127 | struct uhidev_attach_arg *uha = (struct uhidev_attach_arg *)uaa; |
| 128 | struct usbd_device *dev = uha->parent->sc_udev; |
| 129 | |
| 130 | struct uoak_softc *scc = &sc->sc_uoak_softc; |
| 131 | int err, size, repid; |
| 132 | void *desc; |
| 133 | |
| 134 | sc->sc_hdev.sc_intr = uoakrh_intr; |
| 135 | sc->sc_hdev.sc_parent = uha->parent; |
| 136 | sc->sc_hdev.sc_report_id = uha->reportid; |
| 137 | |
| 138 | scc->sc_parent = sc; |
| 139 | scc->sc_udev = dev; |
| 140 | scc->sc_hdev = &sc->sc_hdev; |
| 141 | scc->sc_methods = &uoakrh_methods; |
| 142 | scc->sc_sensordev = &sc->sc_sensordev; |
| 143 | |
| 144 | uhidev_get_report_desc(uha->parent, &desc, &size); |
| 145 | repid = uha->reportid; |
| 146 | scc->sc_ilen = hid_report_size(desc, size, hid_input, repid); |
| 147 | scc->sc_olen = hid_report_size(desc, size, hid_output, repid); |
| 148 | scc->sc_flen = hid_report_size(desc, size, hid_feature, repid); |
| 149 | |
| 150 | /* device initialize */ |
| 151 | (void)uoak_led_ctrl(scc, OAK_TARGET_RAM, OAK_LED_ON0x1); |
| 152 | err = uoak_set_sample_rate(scc, OAK_TARGET_RAM, UOAKRH_SAMPLE_RATE200); |
| 153 | if (err) { |
| 154 | printf("%s: could not set sampling rate. exit\n", |
| 155 | sc->sc_hdev.sc_dev.dv_xname); |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | /* query and print device setting */ |
| 160 | uoak_get_devinfo(scc); |
| 161 | uoak_print_devinfo(scc); |
| 162 | |
| 163 | DPRINTF((" config in RAM\n")); |
| 164 | uoak_get_setting(scc, OAK_TARGET_RAM); |
| 165 | uoak_print_setting(scc, OAK_TARGET_RAM); |
| 166 | #ifdef UOAKV_DEBUG |
| 167 | DPRINTF((" config in FLASH\n")); |
| 168 | uoak_get_setting(scc, OAK_TARGET_FLASH); |
| 169 | uoak_print_setting(scc, OAK_TARGET_FLASH); |
| 170 | #endif |
| 171 | |
| 172 | /* attach sensor */ |
| 173 | strlcpy(sc->sc_sensordev.xname, sc->sc_hdev.sc_dev.dv_xname, |
| 174 | sizeof(sc->sc_sensordev.xname)); |
| 175 | sc->sc_sensor.temp.type = SENSOR_TEMP; |
| 176 | sc->sc_sensor.humi.type = SENSOR_HUMIDITY; |
| 177 | sc->sc_sensor.temp.flags |= SENSOR_FINVALID0x0001; |
| 178 | sc->sc_sensor.humi.flags |= SENSOR_FINVALID0x0001; |
| 179 | |
| 180 | /* add label with sensor serial# */ |
| 181 | (void)snprintf(sc->sc_sensor.temp.desc, sizeof(sc->sc_sensor.temp.desc), |
| 182 | "Temp.(#%s)", scc->sc_udi.udi_serial); |
| 183 | (void)snprintf(sc->sc_sensor.humi.desc, sizeof(sc->sc_sensor.humi.desc), |
| 184 | "%%RH(#%s)", scc->sc_udi.udi_serial); |
| 185 | sensor_attach(&sc->sc_sensordev, &sc->sc_sensor.temp); |
| 186 | sensor_attach(&sc->sc_sensordev, &sc->sc_sensor.humi); |
| 187 | |
| 188 | /* start sensor */ |
| 189 | sc->sc_sensortask = sensor_task_register(sc, uoakrh_refresh, |
| 190 | UOAKRH_REFRESH_PERIOD10); |
| 191 | if (sc->sc_sensortask == NULL((void *)0)) { |
| 192 | printf(", unable to register update task\n"); |
| 193 | return; |
| 194 | } |
| 195 | sensordev_install(&sc->sc_sensordev); |
| 196 | |
| 197 | err = uhidev_open(&sc->sc_hdev); |
| 198 | if (err) { |
| 199 | printf("%s: could not open interrupt pipe, quit\n", |
| 200 | sc->sc_hdev.sc_dev.dv_xname); |
| 201 | return; |
| 202 | } |
| 203 | scc->sc_ibuf = malloc(scc->sc_ilen, M_USBDEV102, M_WAITOK0x0001); |
| 204 | |
| 205 | DPRINTF(("uoakrh_attach: complete\n")); |
| 206 | } |
| 207 | |
| 208 | int |
| 209 | uoakrh_detach(struct device *self, int flags) |
| 210 | { |
| 211 | struct uoakrh_softc *sc = (struct uoakrh_softc *)self; |
| 212 | struct uoak_softc *scc = &sc->sc_uoak_softc; |
| 213 | int rv = 0; |
| 214 | |
| 215 | wakeup(&sc->sc_sensortask); |
| 216 | sensordev_deinstall(&sc->sc_sensordev); |
| 217 | |
| 218 | sensor_detach(&sc->sc_sensordev, &sc->sc_sensor.temp); |
| 219 | sensor_detach(&sc->sc_sensordev, &sc->sc_sensor.humi); |
| 220 | |
| 221 | if (sc->sc_sensortask != NULL((void *)0)) |
| 222 | sensor_task_unregister(sc->sc_sensortask); |
| 223 | |
| 224 | if (sc->sc_hdev.sc_state & UHIDEV_OPEN0x01) |
| 225 | uhidev_close(&sc->sc_hdev); |
| 226 | |
| 227 | if (scc->sc_ibuf != NULL((void *)0)) { |
| 228 | free(scc->sc_ibuf, M_USBDEV102, scc->sc_ilen); |
| 229 | scc->sc_ibuf = NULL((void *)0); |
| 230 | } |
| 231 | |
| 232 | return (rv); |
| 233 | } |
| 234 | |
| 235 | void |
| 236 | uoakrh_intr(struct uhidev *addr, void *ibuf, u_int len) |
| 237 | { |
| 238 | struct uoakrh_softc *sc = (struct uoakrh_softc *)addr; |
| 239 | struct uoakrh_sensor *s = &sc->sc_sensor; |
| 240 | struct uoak_softc *scc = &sc->sc_uoak_softc; |
| 241 | int frame, temp, humi; |
| 242 | |
| 243 | if (scc->sc_ibuf == NULL((void *)0)) |
| 244 | return; |
| 245 | |
| 246 | memcpy(scc->sc_ibuf, ibuf, len)__builtin_memcpy((scc->sc_ibuf), (ibuf), (len)); |
| 247 | frame = (scc->sc_ibuf[1] << 8) + (scc->sc_ibuf[0]); |
Value stored to 'frame' is never read | |
| 248 | humi = (scc->sc_ibuf[3] << 8) + (scc->sc_ibuf[2]); |
| 249 | temp = (scc->sc_ibuf[5] << 8) + (scc->sc_ibuf[4]); |
| 250 | |
| 251 | if (s->count == 0) { |
| 252 | s->tempval = temp; |
| 253 | s->humival = humi; |
| 254 | } |
| 255 | |
| 256 | /* calculate average value */ |
| 257 | s->tempval = (s->tempval * s->count + temp) / (s->count + 1); |
| 258 | s->humival = (s->humival * s->count + humi) / (s->count + 1); |
| 259 | |
| 260 | s->count++; |
| 261 | } |
| 262 | |
| 263 | void |
| 264 | uoakrh_refresh(void *arg) |
| 265 | { |
| 266 | struct uoakrh_softc *sc = arg; |
| 267 | struct uoakrh_sensor *s = &sc->sc_sensor; |
| 268 | struct uoak_softc *scc = &sc->sc_uoak_softc; |
| 269 | uint8_t led; |
| 270 | |
| 271 | /* blink LED for each cycle */ |
| 272 | if (uoak_led_status(scc, OAK_TARGET_RAM, &led) < 0) |
| 273 | DPRINTF(("status query error\n")); |
| 274 | if (led == OAK_LED_OFF0x0) |
| 275 | (void)uoak_led_ctrl(scc, OAK_TARGET_RAM, OAK_LED_ON0x1); |
| 276 | else |
| 277 | (void)uoak_led_ctrl(scc, OAK_TARGET_RAM, OAK_LED_OFF0x0); |
| 278 | |
| 279 | /* update sensor value */ |
| 280 | s->temp.value = (uint64_t)(s->tempval) * 10000; |
| 281 | s->humi.value = (uint64_t)(s->humival) * 10; |
| 282 | s->temp.flags &= ~SENSOR_FINVALID0x0001; |
| 283 | s->humi.flags &= ~SENSOR_FINVALID0x0001; |
| 284 | s->count = 0; |
| 285 | } |
| 286 | |
| 287 | |
| 288 | int |
| 289 | uoakrh_get_sensor_setting(struct uoakrh_softc *sc, enum uoak_target target) |
| 290 | { |
| 291 | uint8_t result; |
| 292 | struct uoak_softc *scc = &sc->sc_uoak_softc; |
| 293 | |
| 294 | memset(&scc->sc_rcmd, 0, sizeof(struct uoak_rcmd))__builtin_memset((&scc->sc_rcmd), (0), (sizeof(struct uoak_rcmd ))); |
| 295 | scc->sc_rcmd.target = target; |
| 296 | scc->sc_rcmd.datasize = 0x1; |
| 297 | USETW(&scc->sc_rcmd.cmd, OAK_CMD_SENSORSETTING)(*(u_int16_t *)(&scc->sc_rcmd.cmd) = (0x0002)); |
| 298 | |
| 299 | if (uoak_get_cmd(scc) < 0) |
| 300 | return EIO5; |
| 301 | |
| 302 | result = scc->sc_buf[1]; |
| 303 | sc->sc_sensor.resolution = (result & OAK_RH_SENSOR_RES_MASK(0x1 << 0)); |
| 304 | sc->sc_rh_heater = (result & OAK_RH_SENSOR_HEATER_MASK(0x1 << 3)) >> 2; |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* device specific functions */ |
| 310 | void |
| 311 | uoakrh_dev_setting(void *parent, enum uoak_target target) |
| 312 | { |
| 313 | struct uoakrh_softc *sc = (struct uoakrh_softc *)parent; |
| 314 | |
| 315 | /* get device specific configuration */ |
| 316 | (void)uoakrh_get_sensor_setting(sc, target); |
| 317 | } |
| 318 | |
| 319 | void |
| 320 | uoakrh_dev_print(void *parent, enum uoak_target target) |
| 321 | { |
| 322 | struct uoakrh_softc *sc = (struct uoakrh_softc *)parent; |
| 323 | |
| 324 | printf(", %s", |
| 325 | (sc->sc_sensor.resolution ? "8bit RH/12 bit" : "12bit RH/14bit")); |
| 326 | printf(", heater %s", (sc->sc_rh_heater ? "ON" : "OFF")); |
| 327 | } |