/* $OpenBSD: ugold.c,v 1.7 2014/12/11 18:39:27 mpi Exp $ */ /* * Copyright (c) 2013 Takayoshi SASANO * Copyright (c) 2013 Martin Pieuchot * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* Driver for Microdia's HID based TEMPer Temperature sensor */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbdevs.h" #define USB_DEBUG_VAR usb_debug #include #define UGOLD_INNER 0 #define UGOLD_OUTER 1 #define UGOLD_MAX_SENSORS 2 #define UGOLD_CMD_DATA 0x80 #define UGOLD_CMD_INIT 0x82 enum { UGOLD_INTR_DT, UGOLD_N_TRANSFER, }; /* * This driver only uses two of the three known commands for the * TEMPerV1.2 device. * * The first byte of the answer corresponds to the command and the * second one seems to be the size (in bytes) of the answer. * * The device always sends 8 bytes and if the length of the answer * is less than that, it just leaves the last bytes untouched. That * is why most of the time the last n bytes of the answers are the * same. * * The third command below seems to generate two answers with a * string corresponding to the device, for example: * 'TEMPer1F' and '1.1Per1F' (here Per1F is repeated). */ static uint8_t cmd_data[8] = {0x01, 0x80, 0x33, 0x01, 0x00, 0x00, 0x00, 0x00}; static uint8_t cmd_init[8] = {0x01, 0x82, 0x77, 0x01, 0x00, 0x00, 0x00, 0x00}; #if 0 static uint8_t cmd_type[8] = {0x01, 0x86, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00}; #endif struct ugold_softc; struct ugold_readout_msg { struct usb_proc_msg hdr; struct ugold_softc *sc; }; struct ugold_softc { struct usb_device *sc_udev; struct usb_xfer *sc_xfer[UGOLD_N_TRANSFER]; struct callout sc_callout; struct mtx sc_mtx; struct ugold_readout_msg sc_readout_msg[2]; int sc_num_sensors; int sc_sensor[UGOLD_MAX_SENSORS]; int sc_calib[UGOLD_MAX_SENSORS]; int sc_valid[UGOLD_MAX_SENSORS]; uint8_t sc_report_id; uint8_t sc_iface_index[2]; }; /* prototypes */ static device_probe_t ugold_probe; static device_attach_t ugold_attach; static device_detach_t ugold_detach; static usb_proc_callback_t ugold_readout_msg; static usb_callback_t ugold_intr_callback; static devclass_t ugold_devclass; static device_method_t ugold_methods[] = { DEVMETHOD(device_probe, ugold_probe), DEVMETHOD(device_attach, ugold_attach), DEVMETHOD(device_detach, ugold_detach), DEVMETHOD_END }; static driver_t ugold_driver = { .name = "ugold", .methods = ugold_methods, .size = sizeof(struct ugold_softc), }; static const STRUCT_USB_HOST_ID ugold_devs[] = { {USB_VPI(USB_VENDOR_CHICONY2, USB_PRODUCT_CHICONY2_TEMPER, 0)}, }; DRIVER_MODULE(ugold, uhub, ugold_driver, ugold_devclass, NULL, NULL); MODULE_DEPEND(ugold, usb, 1, 1, 1); MODULE_DEPEND(ugold, hid, 1, 1, 1); MODULE_VERSION(ugold, 1); USB_PNP_HOST_INFO(ugold_devs); static const struct usb_config ugold_config[UGOLD_N_TRANSFER] = { [UGOLD_INTR_DT] = { .type = UE_INTERRUPT, .endpoint = UE_ADDR_ANY, .direction = UE_DIR_IN, .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, .bufsize = 0, /* use wMaxPacketSize */ .callback = &ugold_intr_callback, .if_index = 1, }, }; static void ugold_timeout(void *arg) { struct ugold_softc *sc = arg; usb_proc_explore_lock(sc->sc_udev); (void)usb_proc_explore_msignal(sc->sc_udev, &sc->sc_readout_msg[0], &sc->sc_readout_msg[1]); usb_proc_explore_unlock(sc->sc_udev); callout_reset(&sc->sc_callout, 6 * hz, &ugold_timeout, sc); } static int ugold_probe(device_t dev) { struct usb_attach_arg *uaa; uaa = device_get_ivars(dev); if (uaa->usb_mode != USB_MODE_HOST) return (ENXIO); if (uaa->info.bInterfaceClass != UICLASS_HID) return (ENXIO); if (uaa->info.bIfaceIndex != 0) return (ENXIO); return (usbd_lookup_id_by_uaa(ugold_devs, sizeof(ugold_devs), uaa)); } static int ugold_attach(device_t dev) { struct ugold_softc *sc = device_get_softc(dev); struct usb_attach_arg *uaa = device_get_ivars(dev); struct sysctl_oid *sensor_tree; uint16_t d_len; void *d_ptr; int error; int i; sc->sc_udev = uaa->device; sc->sc_readout_msg[0].hdr.pm_callback = &ugold_readout_msg; sc->sc_readout_msg[0].sc = sc; sc->sc_readout_msg[1].hdr.pm_callback = &ugold_readout_msg; sc->sc_readout_msg[1].sc = sc; sc->sc_iface_index[0] = uaa->info.bIfaceIndex; sc->sc_iface_index[1] = uaa->info.bIfaceIndex + 1; device_set_usb_desc(dev); mtx_init(&sc->sc_mtx, "ugold lock", NULL, MTX_DEF | MTX_RECURSE); callout_init_mtx(&sc->sc_callout, &sc->sc_mtx, 0); /* grab all interfaces from other drivers */ for (i = 0;; i++) { if (i == uaa->info.bIfaceIndex) continue; if (usbd_get_iface(uaa->device, i) == NULL) break; usbd_set_parent_iface(uaa->device, i, uaa->info.bIfaceIndex); } /* figure out report ID */ error = usbd_req_get_hid_desc(uaa->device, NULL, &d_ptr, &d_len, M_TEMP, uaa->info.bIfaceIndex); if (error) goto detach; (void)hid_report_size_max(d_ptr, d_len, hid_input, &sc->sc_report_id); free(d_ptr, M_TEMP); error = usbd_transfer_setup(uaa->device, sc->sc_iface_index, sc->sc_xfer, ugold_config, UGOLD_N_TRANSFER, sc, &sc->sc_mtx); if (error) goto detach; sensor_tree = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensors", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, ""); if (sensor_tree == NULL) { error = ENOMEM; goto detach; } SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "inner", CTLFLAG_RD, &sc->sc_sensor[UGOLD_INNER], 0, "Inner temperature in microCelsius"); SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "inner_valid", CTLFLAG_RD, &sc->sc_valid[UGOLD_INNER], 0, "Inner temperature is valid"); SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "inner_calib", CTLFLAG_RWTUN, &sc->sc_calib[UGOLD_INNER], 0, "Inner calibration temperature in microCelsius"); SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "outer", CTLFLAG_RD, &sc->sc_sensor[UGOLD_OUTER], 0, "Outer temperature in microCelsius"); SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "outer_calib", CTLFLAG_RWTUN, &sc->sc_calib[UGOLD_OUTER], 0, "Outer calibration temperature in microCelsius"); SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sensor_tree), OID_AUTO, "outer_valid", CTLFLAG_RD, &sc->sc_valid[UGOLD_OUTER], 0, "Outer temperature is valid"); mtx_lock(&sc->sc_mtx); usbd_transfer_start(sc->sc_xfer[UGOLD_INTR_DT]); ugold_timeout(sc); mtx_unlock(&sc->sc_mtx); return (0); detach: DPRINTF("error=%s\n", usbd_errstr(error)); ugold_detach(dev); return (error); } static int ugold_detach(device_t dev) { struct ugold_softc *sc = device_get_softc(dev); callout_drain(&sc->sc_callout); usb_proc_explore_lock(sc->sc_udev); usb_proc_explore_mwait(sc->sc_udev, &sc->sc_readout_msg[0], &sc->sc_readout_msg[1]); usb_proc_explore_unlock(sc->sc_udev); usbd_transfer_unsetup(sc->sc_xfer, UGOLD_N_TRANSFER); mtx_destroy(&sc->sc_mtx); return (0); } static int ugold_ds75_temp(uint8_t msb, uint8_t lsb) { /* DS75: 12bit precision mode : 0.0625 degrees Celsius ticks */ /* NOTE: MSB has a sign bit for negative temperatures */ int32_t temp = (msb << 24) | ((lsb & 0xF0) << 16); return (((int64_t)temp * (int64_t)1000000LL) >> 24); } static void ugold_intr_callback(struct usb_xfer *xfer, usb_error_t error) { struct ugold_softc *sc = usbd_xfer_softc(xfer); struct usb_page_cache *pc; uint8_t buf[8]; int temp; int len; usbd_xfer_status(xfer, &len, NULL, NULL, NULL); switch (USB_GET_STATE(xfer)) { case USB_ST_TRANSFERRED: memset(buf, 0, sizeof(buf)); pc = usbd_xfer_get_frame(xfer, 0); usbd_copy_out(pc, 0, buf, MIN(len, sizeof(buf))); switch (buf[0]) { case UGOLD_CMD_INIT: if (sc->sc_num_sensors) break; sc->sc_num_sensors = MIN(buf[1], UGOLD_MAX_SENSORS) /* XXX */ ; DPRINTF("%d sensor%s type ds75/12bit (temperature)\n", sc->sc_num_sensors, (sc->sc_num_sensors == 1) ? "" : "s"); break; case UGOLD_CMD_DATA: switch (buf[1]) { case 4: temp = ugold_ds75_temp(buf[4], buf[5]); sc->sc_sensor[UGOLD_OUTER] = temp + sc->sc_calib[UGOLD_OUTER]; sc->sc_valid[UGOLD_OUTER] = 1; /* FALLTHROUGH */ case 2: temp = ugold_ds75_temp(buf[2], buf[3]); sc->sc_sensor[UGOLD_INNER] = temp + sc->sc_calib[UGOLD_INNER]; sc->sc_valid[UGOLD_INNER] = 1; break; default: DPRINTF("invalid data length (%d bytes)\n", buf[1]); } break; default: DPRINTF("unknown command 0x%02x\n", buf[0]); break; } /* FALLTHROUGH */ case USB_ST_SETUP: tr_setup: usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); usbd_transfer_submit(xfer); break; default: /* Error */ if (error != USB_ERR_CANCELLED) { /* try clear stall first */ usbd_xfer_set_stall(xfer); goto tr_setup; } break; } } static int ugold_issue_cmd(struct ugold_softc *sc, uint8_t *cmd, int len) { return (usbd_req_set_report(sc->sc_udev, &sc->sc_mtx, cmd, len, sc->sc_iface_index[1], UHID_OUTPUT_REPORT, sc->sc_report_id)); } static void ugold_readout_msg(struct usb_proc_msg *pm) { struct ugold_softc *sc = ((struct ugold_readout_msg *)pm)->sc; usb_proc_explore_unlock(sc->sc_udev); mtx_lock(&sc->sc_mtx); if (sc->sc_num_sensors == 0) ugold_issue_cmd(sc, cmd_init, sizeof(cmd_init)); ugold_issue_cmd(sc, cmd_data, sizeof(cmd_data)); mtx_unlock(&sc->sc_mtx); usb_proc_explore_lock(sc->sc_udev); }