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/* $OpenBSD: ugold.c,v 1.6 2014/04/29 12:53:33 mpi Exp $ */
/*
* Copyright (c) 2013 Takayoshi SASANO <sasano@openbsd.org>
* Copyright (c) 2013 Martin Pieuchot <mpi@openbsd.org>
*
* 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 base TEMPer Temperature sensor */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/sensors.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/uhidev.h>
#include <dev/usb/hid.h>
#define UGOLD_INNER 0
#define UGOLD_OUTER 1
#define UGOLD_MAX_SENSORS 2
#define UGOLD_CMD_DATA 0x80
#define UGOLD_CMD_INIT 0x82
/*
* 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 uhidev sc_hdev;
struct usbd_device *sc_udev;
int sc_num_sensors;
struct ksensor sc_sensor[UGOLD_MAX_SENSORS];
struct ksensordev sc_sensordev;
struct sensor_task *sc_sensortask;
};
const struct usb_devno ugold_devs[] = {
{ USB_VENDOR_MICRODIA, USB_PRODUCT_MICRODIA_TEMPER },
};
int ugold_match(struct device *, void *, void *);
void ugold_attach(struct device *, struct device *, void *);
int ugold_detach(struct device *, int);
void ugold_intr(struct uhidev *, void *, u_int);
void ugold_refresh(void *);
int ugold_issue_cmd(struct ugold_softc *, uint8_t *, int);
struct cfdriver ugold_cd = {
NULL, "ugold", DV_DULL
};
const struct cfattach ugold_ca = {
sizeof(struct ugold_softc), ugold_match, ugold_attach, ugold_detach,
};
int
ugold_match(struct device *parent, void *match, void *aux)
{
struct uhidev_attach_arg *uha = aux;
int size;
void *desc;
if (uha->reportid == UHIDEV_CLAIM_ALLREPORTID)
return (UMATCH_NONE);
if (usb_lookup(ugold_devs, uha->uaa->vendor, uha->uaa->product) == NULL)
return (UMATCH_NONE);
/*
* XXX Only match the sensor interface.
*
* Does it makes sense to attach various uhidev(4) to these
* non-standard HID devices?
*/
uhidev_get_report_desc(uha->parent, &desc, &size);
if (hid_is_collection(desc, size, uha->reportid,
HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_KEYBOARD)))
return (UMATCH_NONE);
return (UMATCH_VENDOR_PRODUCT);
}
void
ugold_attach(struct device *parent, struct device *self, void *aux)
{
struct ugold_softc *sc = (struct ugold_softc *)self;
struct uhidev_attach_arg *uha = aux;
int size, repid;
void *desc;
sc->sc_udev = uha->parent->sc_udev;
sc->sc_hdev.sc_intr = ugold_intr;
sc->sc_hdev.sc_parent = uha->parent;
sc->sc_hdev.sc_report_id = uha->reportid;
uhidev_get_report_desc(uha->parent, &desc, &size);
repid = uha->reportid;
sc->sc_hdev.sc_isize = hid_report_size(desc, size, hid_input, repid);
sc->sc_hdev.sc_osize = hid_report_size(desc, size, hid_output, repid);
sc->sc_hdev.sc_fsize = hid_report_size(desc, size, hid_feature, repid);
if (uhidev_open(&sc->sc_hdev)) {
printf(", unable to open interrupt pipe\n");
return;
}
strlcpy(sc->sc_sensordev.xname, sc->sc_hdev.sc_dev.dv_xname,
sizeof(sc->sc_sensordev.xname));
sc->sc_sensor[UGOLD_OUTER].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[UGOLD_OUTER].desc, "outer",
sizeof(sc->sc_sensor[UGOLD_OUTER].desc));
sc->sc_sensor[UGOLD_INNER].type = SENSOR_TEMP;
strlcpy(sc->sc_sensor[UGOLD_INNER].desc, "inner",
sizeof(sc->sc_sensor[UGOLD_INNER].desc));
/* 0.1Hz */
sc->sc_sensortask = sensor_task_register(sc, ugold_refresh, 6);
if (sc->sc_sensortask == NULL) {
printf(", unable to register update task\n");
return;
}
printf("\n");
sensordev_install(&sc->sc_sensordev);
}
int
ugold_detach(struct device *self, int flags)
{
struct ugold_softc *sc = (struct ugold_softc *)self;
int i;
if (sc->sc_sensortask != NULL) {
sensor_task_unregister(sc->sc_sensortask);
sensordev_deinstall(&sc->sc_sensordev);
}
for (i = 0; i < sc->sc_num_sensors; i++)
sensor_detach(&sc->sc_sensordev, &sc->sc_sensor[i]);
if (sc->sc_hdev.sc_state & UHIDEV_OPEN)
uhidev_close(&sc->sc_hdev);
return (0);
}
static int
ugold_ds75_temp(uint8_t msb, uint8_t lsb)
{
/* DS75: 12bit precision mode : 0.0625 degrees Celsius ticks */
return (((msb * 100) + ((lsb >> 4) * 25 / 4)) * 10000) + 273150000;
}
void
ugold_intr(struct uhidev *addr, void *ibuf, u_int len)
{
struct ugold_softc *sc = (struct ugold_softc *)addr;
uint8_t *buf = ibuf;
int i, temp;
switch (buf[0]) {
case UGOLD_CMD_INIT:
if (sc->sc_num_sensors)
break;
sc->sc_num_sensors = min(buf[1], UGOLD_MAX_SENSORS) /* XXX */;
for (i = 0; i < sc->sc_num_sensors; i++) {
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
sensor_attach(&sc->sc_sensordev, &sc->sc_sensor[i]);
}
printf("%s: %d sensor%s type ds75/12bit (temperature)\n",
sc->sc_hdev.sc_dev.dv_xname, 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].value = temp;
sc->sc_sensor[UGOLD_OUTER].flags &= ~SENSOR_FINVALID;
/* FALLTHROUGH */
case 2:
temp = ugold_ds75_temp(buf[2], buf[3]);
sc->sc_sensor[UGOLD_INNER].value = temp;
sc->sc_sensor[UGOLD_INNER].flags &= ~SENSOR_FINVALID;
break;
default:
printf("%s: invalid data length (%d bytes)\n",
sc->sc_hdev.sc_dev.dv_xname, buf[1]);
}
break;
default:
printf("%s: unknown command 0x%02x\n",
sc->sc_hdev.sc_dev.dv_xname, buf[0]);
}
}
void
ugold_refresh(void *arg)
{
struct ugold_softc *sc = arg;
int i;
if (sc->sc_num_sensors == 0)
ugold_issue_cmd(sc, cmd_init, sizeof(cmd_init));
if (ugold_issue_cmd(sc, cmd_data, sizeof(cmd_data))) {
for (i = 0; i < sc->sc_num_sensors; i++)
sc->sc_sensor[i].flags |= SENSOR_FINVALID;
}
}
int
ugold_issue_cmd(struct ugold_softc *sc, uint8_t *cmd, int len)
{
return uhidev_set_report_async(&sc->sc_hdev, UHID_OUTPUT_REPORT,
sc->sc_hdev.sc_report_id, cmd, len);
}
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