diff options
author | Marc Balmer <mbalmer@cvs.openbsd.org> | 2006-12-17 16:32:36 +0000 |
---|---|---|
committer | Marc Balmer <mbalmer@cvs.openbsd.org> | 2006-12-17 16:32:36 +0000 |
commit | a95dd31a79af38969a05cc886e289bb1ee832797 (patch) | |
tree | 52fc1ec9acf0271644d2344d045fc785389c75fc /sys | |
parent | 6083f9277517b6ab275011110788a080c535a98e (diff) |
mbg(4), a driver for Meinberg Funkuhren time signal station receivers
"Made in Switzerland"
Currently, the DCF77 PCI32 receiver card is supported
I have to mention the outstanding support from Meinberg, not only did they
give me the hardware, docs, and reference source code, but they even call
me back to explain the details of their hardware to me. If only the wireless
manufacturors were that cooperative...
ok claudio, ok mglocker, "commit it when ready" deraadt
Diffstat (limited to 'sys')
-rw-r--r-- | sys/dev/pci/files.pci | 7 | ||||
-rw-r--r-- | sys/dev/pci/mbg.c | 278 |
2 files changed, 284 insertions, 1 deletions
diff --git a/sys/dev/pci/files.pci b/sys/dev/pci/files.pci index 48e2a17e5d3..8939b601886 100644 --- a/sys/dev/pci/files.pci +++ b/sys/dev/pci/files.pci @@ -1,4 +1,4 @@ -# $OpenBSD: files.pci,v 1.222 2006/12/09 05:10:43 dlg Exp $ +# $OpenBSD: files.pci,v 1.223 2006/12/17 16:32:35 mbalmer Exp $ # $NetBSD: files.pci,v 1.20 1996/09/24 17:47:15 christos Exp $ # # Config file and device description for machine-independent PCI code. @@ -426,6 +426,11 @@ device pwdog: pcibus attach pwdog at pci file dev/pci/pwdog.c pwdog +# Meinberg Funkuhren PCI32 +device mbg: pcibus +attach mbg at pci +file dev/pci/mbg.c mbg + # UHCI USB controller attach uhci at pci with uhci_pci file dev/pci/uhci_pci.c uhci diff --git a/sys/dev/pci/mbg.c b/sys/dev/pci/mbg.c new file mode 100644 index 00000000000..6c93946b39e --- /dev/null +++ b/sys/dev/pci/mbg.c @@ -0,0 +1,278 @@ +/* $OpenBSD: mbg.c,v 1.1 2006/12/17 16:32:35 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(" (unknown firmware),", + mbg->mbg_dev.dv_xname); + else + printf(" (%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"); + else if (tframe.status & MBG_SYNC) + printf(" synchronised"); + else if (tframe.status & MBG_INVALID) + printf(" invalid"); + printf("\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; +} |