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/* $OpenBSD: mbg.c,v 1.2 2006/12/18 07:58:22 mbalmer Exp $ */
/*
* Copyright (c) 2006 Marc Balmer <mbalmer@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 DISCLAIMS 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/sensors.h>
#include <sys/syslog.h>
#include <sys/time.h>
#include <machine/bus.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcidevs.h>
struct mbg_softc {
struct device mbg_dev;
bus_space_tag_t iot;
bus_space_handle_t ioh;
struct sensor timedelta;
struct sensor signal;
u_int8_t status;
};
struct mbg_time {
u_int8_t hundreds;
u_int8_t sec;
u_int8_t min;
u_int8_t hour;
u_int8_t mday;
u_int8_t wday;
u_int8_t mon;
u_int8_t year;
u_int8_t status;
u_int8_t signal;
int8_t utc_off;
};
/* mbg_time.status bits */
#define MBG_FREERUN 0x01 /* clock running on xtal */
#define MBG_DST_ENA 0x02 /* DST enabled */
#define MBG_SYNC 0x04 /* clock synced at least once */
#define MBG_DST_CHG 0x08 /* DST change announcement */
#define MBG_UTC 0x10 /* special UTC firmware is installed */
#define MBG_LEAP 0x20 /* announcement of a leap second */
#define MBG_IFTM 0x40 /* current time was set from host */
#define MBG_INVALID 0x80 /* time is invalid */
/* AMCC S5933 registers */
#define AMCC_OMB1 0x00 /* outgoing mailbox 1 */
#define AMCC_IMB4 0x1c /* incoming mailbox 4 */
#define AMCC_FIFO 0x20 /* FIFO register */
#define AMCC_INTCSR 0x38 /* interrupt control/status register */
#define AMCC_MCSR 0x3c /* master control/status register */
/* commands */
#define MBG_GET_TIME 0x00
#define MBG_GET_SYNC_TIME 0x02
#define MBG_GET_HR_TIME 0x03
#define MBG_GET_FW_ID_1 0x40
#define MBG_GET_FW_ID_2 0x41
#define MBG_GET_SERNUM 0x42
/* misc. constants */
#define MBG_FIFO_LEN 16
#define MBG_ID_LEN (2 * MBG_FIFO_LEN + 1)
#define MBG_BUSY 0x01
#define MBG_SIG_BIAS 55
#define MBG_SIG_MAX 68
int mbg_probe(struct device *, void *, void *);
void mbg_attach(struct device *, struct device *, void *);
int mbg_read(struct mbg_softc *, int cmd, char *buf, size_t len,
struct timespec *tstamp);
void mbg_task(void *);
struct cfattach mbg_ca = {
sizeof(struct mbg_softc), mbg_probe, mbg_attach
};
struct cfdriver mbg_cd = {
NULL, "mbg", DV_DULL
};
const struct pci_matchid mbg_devices[] = {
{ PCI_VENDOR_MEINBERG, PCI_PRODUCT_MEINBERG_PCI32 }
};
int
mbg_probe(struct device *parent, void *match, void *aux)
{
return pci_matchbyid((struct pci_attach_args *)aux, mbg_devices,
sizeof(mbg_devices) / sizeof(mbg_devices[0]));
}
void
mbg_attach(struct device *parent, struct device *self, void *aux)
{
struct mbg_softc *mbg = (struct mbg_softc *)self;
struct pci_attach_args *const pa = (struct pci_attach_args *)aux;
struct mbg_time tframe;
pcireg_t memtype;
bus_size_t iosize;
char fw_id[MBG_ID_LEN];
memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, PCI_MAPREG_START);
if (pci_mapreg_map(pa, PCI_MAPREG_START, memtype, 0, &mbg->iot,
&mbg->ioh, NULL, &iosize, 0)) {
printf("\n%s: PCI %s region not found\n",
mbg->mbg_dev.dv_xname,
memtype == PCI_MAPREG_TYPE_IO ? "I/O" : "memory");
return;
}
if (mbg_read(mbg, MBG_GET_FW_ID_1, fw_id, MBG_FIFO_LEN, NULL) ||
mbg_read(mbg, MBG_GET_FW_ID_2, &fw_id[MBG_FIFO_LEN], MBG_FIFO_LEN,
NULL))
printf(": firmware unknown, ", mbg->mbg_dev.dv_xname);
else {
fw_id[MBG_ID_LEN - 1] = '\0';
printf(": firmware %s, ", fw_id);
}
if (mbg_read(mbg, MBG_GET_TIME, (char *)&tframe,
sizeof(struct mbg_time), NULL)) {
printf("unknown status\n");
mbg->status = 0;
} else {
if (tframe.status & MBG_FREERUN)
printf("free running on xtal\n");
else if (tframe.status & MBG_SYNC)
printf("synchronised\n");
else if (tframe.status & MBG_INVALID)
printf("invalid\n");
mbg->status = tframe.status;
}
strlcpy(mbg->timedelta.device, mbg->mbg_dev.dv_xname,
sizeof(mbg->timedelta.device));
mbg->timedelta.type = SENSOR_TIMEDELTA;
mbg->timedelta.status = SENSOR_S_UNKNOWN;
mbg->timedelta.value = 0LL;
mbg->timedelta.flags = 0;
strlcpy(mbg->timedelta.desc, "DCF77", sizeof(mbg->timedelta.desc));
sensor_add(&mbg->timedelta);
strlcpy(mbg->signal.device, mbg->mbg_dev.dv_xname,
sizeof(mbg->signal.device));
mbg->signal.type = SENSOR_PERCENT;
mbg->signal.status = SENSOR_S_UNKNOWN;
mbg->signal.value = 0LL;
mbg->signal.flags = 0;
strlcpy(mbg->signal.desc, "Signal strength", sizeof(mbg->signal.desc));
sensor_add(&mbg->signal);
sensor_task_register(mbg, mbg_task, 10);
}
void
mbg_task(void *arg)
{
struct mbg_softc *mbg = (struct mbg_softc *)arg;
struct mbg_time tframe;
struct clock_ymdhms ymdhms;
struct timespec tstamp;
time_t trecv;
int signal;
if (mbg_read(mbg, MBG_GET_TIME, (char *)&tframe, sizeof(tframe),
&tstamp)) {
log(LOG_ERR, "%s: error reading time\n",
mbg->mbg_dev.dv_xname);
return;
}
if (tframe.status & MBG_INVALID) {
log(LOG_INFO, "%s: inavlid time, battery was disconnected\n",
mbg->mbg_dev.dv_xname);
return;
}
ymdhms.dt_year = tframe.year + 2000;
ymdhms.dt_mon = tframe.mon;
ymdhms.dt_day = tframe.mday;
ymdhms.dt_hour = tframe.hour;
ymdhms.dt_min = tframe.min;
ymdhms.dt_sec = tframe.sec;
trecv = clock_ymdhms_to_secs(&ymdhms) - tframe.utc_off * 3600;
mbg->timedelta.value = (int64_t)((tstamp.tv_sec - trecv) * 100
- tframe.hundreds) * 10000000LL + tstamp.tv_nsec;
mbg->timedelta.status = SENSOR_S_OK;
mbg->timedelta.tv.tv_sec = tstamp.tv_sec;
mbg->timedelta.tv.tv_usec = tstamp.tv_nsec / 1000;
signal = tframe.signal - MBG_SIG_BIAS;
if (signal < 0)
signal = 0;
else if (signal > MBG_SIG_MAX)
signal = MBG_SIG_MAX;
mbg->signal.value = signal * 100000 / MBG_SIG_MAX;
mbg->signal.status = SENSOR_S_OK;
mbg->signal.tv.tv_sec = mbg->timedelta.tv.tv_sec;
mbg->signal.tv.tv_usec = mbg->timedelta.tv.tv_usec;
if (tframe.status != mbg->status) {
if (tframe.status & MBG_SYNC)
log(LOG_INFO, "%s: clock is synchronized",
mbg->mbg_dev.dv_xname);
else if (tframe.status & MBG_FREERUN)
log(LOG_INFO, "%s: clock is free running on xtal",
mbg->mbg_dev.dv_xname);
mbg->status = tframe.status;
}
}
int
mbg_read(struct mbg_softc *mbg, int cmd, char *buf, size_t len,
struct timespec *tstamp)
{
long timer, tmax;
size_t n;
u_int8_t status;
/* reset inbound mailbox and clear FIFO status */
bus_space_write_1(mbg->iot, mbg->ioh, AMCC_MCSR + 3, 0x0c);
/* set FIFO */
bus_space_write_1(mbg->iot, mbg->ioh, AMCC_INTCSR + 3, 0x3c);
/* write the command, optionally taking a timestamp */
if (tstamp)
nanotime(tstamp);
bus_space_write_1(mbg->iot, mbg->ioh, AMCC_OMB1, cmd);
/* wait for the BUSY flag to go low (approx 70 us on i386) */
timer = 0;
tmax = cold ? 50 : hz / 10;
do {
if (cold)
delay(20);
else
tsleep(tstamp, 0, "mbg", 1);
status = bus_space_read_1(mbg->iot, mbg->ioh, AMCC_IMB4 + 3);
} while ((status & MBG_BUSY) && timer++ < tmax);
if (status & MBG_BUSY)
return -1;
/* read data from the device FIFO */
for (n = 0; n < len; n++) {
if (bus_space_read_2(mbg->iot, mbg->ioh, AMCC_MCSR) & 0x20) {
printf("%s: FIFO error\n", mbg->mbg_dev.dv_xname);
return -1;
}
buf[n] = bus_space_read_1(mbg->iot, mbg->ioh,
AMCC_FIFO + (n % 4));
}
return 0;
}
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