718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
339 lines
7.6 KiB
C
339 lines
7.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2000 Sascha Schumann. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY SASCHA SCHUMANN ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_pcfclock.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/conf.h>
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#include <sys/fcntl.h>
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#include <sys/uio.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/ppbus/ppbconf.h>
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#include <dev/ppbus/ppb_msq.h>
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#include <dev/ppbus/ppbio.h>
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#include "ppbus_if.h"
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#define PCFCLOCK_NAME "pcfclock"
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struct pcfclock_data {
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device_t dev;
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struct cdev *cdev;
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};
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static devclass_t pcfclock_devclass;
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static d_open_t pcfclock_open;
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static d_close_t pcfclock_close;
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static d_read_t pcfclock_read;
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static struct cdevsw pcfclock_cdevsw = {
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.d_version = D_VERSION,
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.d_open = pcfclock_open,
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.d_close = pcfclock_close,
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.d_read = pcfclock_read,
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.d_name = PCFCLOCK_NAME,
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};
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#ifndef PCFCLOCK_MAX_RETRIES
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#define PCFCLOCK_MAX_RETRIES 10
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#endif
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#define AFC_HI 0
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#define AFC_LO AUTOFEED
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/* AUTO FEED is used as clock */
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#define AUTOFEED_CLOCK(val) \
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ctr = (ctr & ~(AUTOFEED)) ^ (val); ppb_wctr(ppbus, ctr)
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/* SLCT is used as clock */
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#define CLOCK_OK \
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((ppb_rstr(ppbus) & SELECT) == (i & 1 ? SELECT : 0))
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/* PE is used as data */
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#define BIT_SET (ppb_rstr(ppbus)&PERROR)
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/* the first byte sent as reply must be 00001001b */
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#define PCFCLOCK_CORRECT_SYNC(buf) (buf[0] == 9)
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#define NR(buf, off) (buf[off+1]*10+buf[off])
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/* check for correct input values */
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#define PCFCLOCK_CORRECT_FORMAT(buf) (\
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NR(buf, 14) <= 99 && \
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NR(buf, 12) <= 12 && \
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NR(buf, 10) <= 31 && \
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NR(buf, 6) <= 23 && \
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NR(buf, 4) <= 59 && \
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NR(buf, 2) <= 59)
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#define PCFCLOCK_BATTERY_STATUS_LOW(buf) (buf[8] & 4)
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#define PCFCLOCK_CMD_TIME 0 /* send current time */
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#define PCFCLOCK_CMD_COPY 7 /* copy received signal to PC */
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static void
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pcfclock_identify(driver_t *driver, device_t parent)
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{
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device_t dev;
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dev = device_find_child(parent, PCFCLOCK_NAME, -1);
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if (!dev)
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BUS_ADD_CHILD(parent, 0, PCFCLOCK_NAME, -1);
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}
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static int
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pcfclock_probe(device_t dev)
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{
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device_set_desc(dev, "PCF-1.0");
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return (0);
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}
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static int
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pcfclock_attach(device_t dev)
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{
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struct pcfclock_data *sc = device_get_softc(dev);
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int unit;
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unit = device_get_unit(dev);
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sc->dev = dev;
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sc->cdev = make_dev(&pcfclock_cdevsw, unit,
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UID_ROOT, GID_WHEEL, 0400, PCFCLOCK_NAME "%d", unit);
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if (sc->cdev == NULL) {
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device_printf(dev, "Failed to create character device\n");
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return (ENXIO);
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}
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sc->cdev->si_drv1 = sc;
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return (0);
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}
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static int
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pcfclock_open(struct cdev *dev, int flag, int fms, struct thread *td)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t pcfclockdev;
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device_t ppbus;
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int res;
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if (!sc)
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return (ENXIO);
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pcfclockdev = sc->dev;
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ppbus = device_get_parent(pcfclockdev);
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ppb_lock(ppbus);
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res = ppb_request_bus(ppbus, pcfclockdev,
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(flag & O_NONBLOCK) ? PPB_DONTWAIT : PPB_WAIT);
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ppb_unlock(ppbus);
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return (res);
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}
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static int
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pcfclock_close(struct cdev *dev, int flags, int fmt, struct thread *td)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t pcfclockdev = sc->dev;
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device_t ppbus = device_get_parent(pcfclockdev);
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ppb_lock(ppbus);
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ppb_release_bus(ppbus, pcfclockdev);
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ppb_unlock(ppbus);
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return (0);
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}
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static void
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pcfclock_write_cmd(struct cdev *dev, unsigned char command)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t pcfclockdev = sc->dev;
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device_t ppbus = device_get_parent(pcfclockdev);
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unsigned char ctr = 14;
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char i;
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for (i = 0; i <= 7; i++) {
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ppb_wdtr(ppbus, i);
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AUTOFEED_CLOCK(i & 1 ? AFC_HI : AFC_LO);
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DELAY(3000);
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}
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ppb_wdtr(ppbus, command);
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AUTOFEED_CLOCK(AFC_LO);
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DELAY(3000);
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AUTOFEED_CLOCK(AFC_HI);
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}
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static void
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pcfclock_display_data(struct cdev *dev, char buf[18])
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{
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struct pcfclock_data *sc = dev->si_drv1;
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#ifdef PCFCLOCK_VERBOSE
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int year;
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year = NR(buf, 14);
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if (year < 70)
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year += 100;
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device_printf(sc->dev, "%02d.%02d.%4d %02d:%02d:%02d, "
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"battery status: %s\n",
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NR(buf, 10), NR(buf, 12), 1900 + year,
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NR(buf, 6), NR(buf, 4), NR(buf, 2),
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PCFCLOCK_BATTERY_STATUS_LOW(buf) ? "LOW" : "ok");
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#else
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if (PCFCLOCK_BATTERY_STATUS_LOW(buf))
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device_printf(sc->dev, "BATTERY STATUS LOW ON\n");
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#endif
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}
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static int
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pcfclock_read_data(struct cdev *dev, char *buf, ssize_t bits)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t pcfclockdev = sc->dev;
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device_t ppbus = device_get_parent(pcfclockdev);
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int i;
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char waitfor;
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int offset;
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/* one byte per four bits */
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bzero(buf, ((bits + 3) >> 2) + 1);
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waitfor = 100;
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for (i = 0; i <= bits; i++) {
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/* wait for clock, maximum (waitfor*100) usec */
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while (!CLOCK_OK && --waitfor > 0)
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DELAY(100);
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/* timed out? */
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if (!waitfor)
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return (EIO);
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waitfor = 100; /* reload */
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/* give it some time */
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DELAY(500);
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/* calculate offset into buffer */
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offset = i >> 2;
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buf[offset] <<= 1;
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if (BIT_SET)
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buf[offset] |= 1;
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}
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return (0);
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}
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static int
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pcfclock_read_dev(struct cdev *dev, char *buf, int maxretries)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t pcfclockdev = sc->dev;
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device_t ppbus = device_get_parent(pcfclockdev);
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int error = 0;
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ppb_set_mode(ppbus, PPB_COMPATIBLE);
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while (--maxretries > 0) {
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pcfclock_write_cmd(dev, PCFCLOCK_CMD_TIME);
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if (pcfclock_read_data(dev, buf, 68))
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continue;
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if (!PCFCLOCK_CORRECT_SYNC(buf))
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continue;
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if (!PCFCLOCK_CORRECT_FORMAT(buf))
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continue;
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break;
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}
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if (!maxretries)
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error = EIO;
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return (error);
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}
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static int
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pcfclock_read(struct cdev *dev, struct uio *uio, int ioflag)
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{
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struct pcfclock_data *sc = dev->si_drv1;
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device_t ppbus;
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char buf[18];
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int error = 0;
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if (uio->uio_resid < 18)
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return (ERANGE);
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ppbus = device_get_parent(sc->dev);
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ppb_lock(ppbus);
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error = pcfclock_read_dev(dev, buf, PCFCLOCK_MAX_RETRIES);
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ppb_unlock(ppbus);
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if (error) {
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device_printf(sc->dev, "no PCF found\n");
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} else {
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pcfclock_display_data(dev, buf);
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uiomove(buf, 18, uio);
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}
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return (error);
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}
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static device_method_t pcfclock_methods[] = {
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/* device interface */
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DEVMETHOD(device_identify, pcfclock_identify),
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DEVMETHOD(device_probe, pcfclock_probe),
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DEVMETHOD(device_attach, pcfclock_attach),
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{ 0, 0 }
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};
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static driver_t pcfclock_driver = {
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PCFCLOCK_NAME,
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pcfclock_methods,
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sizeof(struct pcfclock_data),
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};
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DRIVER_MODULE(pcfclock, ppbus, pcfclock_driver, pcfclock_devclass, 0, 0);
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