495 lines
11 KiB
C
495 lines
11 KiB
C
/*-
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* Copyright (c) 2003 Poul-Henning Kamp
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* 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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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef _KERNEL
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/kthread.h>
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#include <sys/conf.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <pci_if.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#endif /* _KERNEL */
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#include <sys/ioccom.h>
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struct wave {
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int index;
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int period;
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int offset;
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int length;
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int avg;
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off_t mapvir;
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int flags;
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int npages;
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void **virtual;
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};
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#define ADLINK_SETWAVE _IOWR('A', 232, struct wave)
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#define ADLINK_GETWAVE _IOWR('A', 233, struct wave)
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#ifdef _KERNEL
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#define INTPERPAGE (PAGE_SIZE / sizeof(int))
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#define I16PERPAGE (PAGE_SIZE / sizeof(int16_t))
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/*
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* Sample rate
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*/
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#define SPS 1250000
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/*
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* We sample one channel (= 16 bits) at 1.25 msps giving 2.5Mbyte/sec,
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* 100 pages will give us about 1/6 second buffering.
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*/
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#define NRING 100
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/*
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* How many waves are we willing to entertain
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*/
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#define NWAVE 25
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struct info {
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int nring;
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off_t o_ring;
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int ngri;
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int ppgri;
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off_t o_gri;
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};
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struct softc {
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device_t device;
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void *intrhand;
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struct resource *r0, *r1, *ri;
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bus_space_tag_t t0, t1;
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bus_space_handle_t h0, h1;
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struct cdev *dev;
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off_t mapvir;
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struct proc *procp;
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struct info *info;
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struct wave *wave[NWAVE];
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int idx;
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void *ring[NRING];
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vm_paddr_t pring[NRING];
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int stat[NRING];
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uint64_t cnt;
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u_char flags[I16PERPAGE];
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};
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static void
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adlink_wave(struct softc *sc, struct wave *wp, int16_t *sp)
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{
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int f, i, k, m, *ip;
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f = 0;
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for (i = 0; i < I16PERPAGE; ) {
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k = (sc->cnt - wp->offset + i) % wp->period;
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if (k >= wp->length) {
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i += wp->period - k;
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sp += wp->period - k;
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continue;
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}
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m = k % INTPERPAGE;
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ip = (int *)(wp->virtual[k / INTPERPAGE]) + m;
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while (m < INTPERPAGE && i < I16PERPAGE && k < wp->length) {
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if (sc->flags[i] >= wp->index)
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*ip += (*sp * 8 - *ip) >> wp->avg;
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if (wp->flags & 1)
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sc->flags[i] = wp->index;
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sp++;
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ip++;
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m++;
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i++;
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k++;
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}
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}
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}
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static void
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adlink_tickle(struct softc *sc)
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{
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wakeup(sc);
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tsleep(&sc->ring, PUSER | PCATCH, "tickle", 1);
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}
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static int
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adlink_new_wave(struct softc *sc, int index, int period, int offset, int length, int avg, int flags)
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{
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struct wave *wp;
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int l, i;
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void **oldvir, **newvir;
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if (index < 0 || index >= NWAVE)
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return (EINVAL);
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wp = sc->wave[index];
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if (wp == NULL) {
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adlink_tickle(sc);
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wp = malloc(sizeof *wp, M_DEVBUF, M_WAITOK | M_ZERO);
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}
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l = howmany(length, INTPERPAGE);
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/* Setting a high average here to neuter the realtime bits */
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wp->avg = 31;
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if (wp->npages < l) {
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oldvir = wp->virtual;
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adlink_tickle(sc);
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newvir = malloc(sizeof(void *) * l, M_DEVBUF, M_WAITOK | M_ZERO);
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if (wp->npages > 0) {
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adlink_tickle(sc);
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bcopy(oldvir, newvir, wp->npages * sizeof(void *));
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}
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for (i = wp->npages; i < l; i++) {
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adlink_tickle(sc);
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newvir[i] = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK);
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}
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wp->virtual = newvir;
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wp->npages = l;
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wp->mapvir = sc->mapvir;
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sc->mapvir += l * PAGE_SIZE;
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} else {
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oldvir = NULL;
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}
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wp->index = index;
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wp->period = period;
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wp->offset = offset;
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wp->length = length;
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wp->flags = flags;
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for (i = 0; i < l; i++) {
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adlink_tickle(sc);
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bzero(wp->virtual[i], PAGE_SIZE);
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}
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wp->avg = avg;
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sc->wave[index] = wp;
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printf("Wave[%d] {period %d, offset %d, length %d, avg %d, flags %x}\n",
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wp->index, wp->period, wp->offset, wp->length, wp->avg, wp->flags);
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free(oldvir, M_DEVBUF);
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return (0);
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}
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static void
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adlink_loran(void *arg)
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{
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struct softc *sc;
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int idx, i;
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sc = arg;
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idx = 0;
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mtx_lock(&Giant);
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for (;;) {
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while (sc->stat[idx] == 0)
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msleep(sc, NULL, PRIBIO, "loran", 1);
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memset(sc->flags, NWAVE, sizeof sc->flags);
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for (i = 0; i < NWAVE; i++) {
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if (sc->wave[i] != NULL)
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adlink_wave(sc, sc->wave[i], sc->ring[idx]);
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}
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sc->cnt += I16PERPAGE;
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sc->stat[idx] = 0;
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idx++;
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idx %= NRING;
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}
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mtx_unlock(&Giant);
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kthread_exit(0);
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}
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static int
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adlink_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
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{
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static int once;
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struct softc *sc;
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int i, error;
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uint32_t u;
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if (once)
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return (0);
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once = 1;
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sc = dev->si_drv1;
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sc->info = malloc(PAGE_SIZE, M_DEVBUF, M_ZERO | M_WAITOK);
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sc->info->nring = NRING;
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sc->info->o_ring = PAGE_SIZE;
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for (i = 0; i < NRING; i++) {
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sc->ring[i] = malloc(PAGE_SIZE, M_DEVBUF, M_ZERO | M_WAITOK);
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sc->pring[i] = vtophys(sc->ring[i]);
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}
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error = adlink_new_wave(sc, NWAVE - 1, SPS, 0, SPS, 7, 0);
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if (error)
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return (error);
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error = kthread_create(adlink_loran, sc, &sc->procp,
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0, 0, "adlink%d", device_get_unit(sc->device));
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if (error)
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return (error);
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/* Enable interrupts on write complete */
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bus_space_write_4(sc->t0, sc->h0, 0x38, 0x00004000);
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/* Sample CH0 only */
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bus_space_write_4(sc->t1, sc->h1, 0x00, 1);
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/* Divide clock by four */
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bus_space_write_4(sc->t1, sc->h1, 0x04, 4);
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/* Software trigger mode: software */
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bus_space_write_4(sc->t1, sc->h1, 0x08, 0);
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/* Trigger level zero */
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bus_space_write_4(sc->t1, sc->h1, 0x0c, 0);
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/* Trigger source CH0 (not used) */
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bus_space_write_4(sc->t1, sc->h1, 0x10, 0);
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/* Fifo control/status: flush */
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bus_space_write_4(sc->t1, sc->h1, 0x18, 3);
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/* Clock source: external sine */
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bus_space_write_4(sc->t1, sc->h1, 0x20, 2);
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/* Set up Write DMA */
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bus_space_write_4(sc->t0, sc->h0, 0x24, sc->pring[i]);
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bus_space_write_4(sc->t0, sc->h0, 0x28, PAGE_SIZE);
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u = bus_space_read_4(sc->t0, sc->h0, 0x3c);
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bus_space_write_4(sc->t0, sc->h0, 0x3c, u | 0x00000600);
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/* Acquisition Enable Register: go! */
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bus_space_write_4(sc->t1, sc->h1, 0x1c, 1);
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return (0);
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}
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static int
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adlink_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
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{
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struct softc *sc;
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struct wave *wp;
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int i, error;
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sc = dev->si_drv1;
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wp = (struct wave *)data;
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i = wp->index;
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if (i < 0 || i >= NWAVE)
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return (EINVAL);
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if (cmd == ADLINK_GETWAVE) {
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if (sc->wave[i] == NULL)
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return (ENOENT);
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bcopy(sc->wave[i], wp, sizeof(*wp));
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return (0);
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}
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if (cmd == ADLINK_SETWAVE) {
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error = adlink_new_wave(sc,
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i,
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wp->period,
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wp->offset,
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wp->length,
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wp->avg,
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wp->flags);
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if (error)
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return (error);
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bcopy(sc->wave[i], wp, sizeof(*wp));
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return (0);
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}
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return (ENOIOCTL);
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}
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static int
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adlink_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
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{
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struct softc *sc;
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struct wave *wp;
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int i, j;
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sc = dev->si_drv1;
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if (nprot != VM_PROT_READ)
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return (-1);
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for (i = 0; i < NWAVE; i++) {
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if (sc->wave[i] == NULL)
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continue;
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wp = sc->wave[i];
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if (offset < wp->mapvir)
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continue;
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j = (offset - wp->mapvir) / PAGE_SIZE;
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if (j >= wp->npages)
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continue;
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*paddr = vtophys(wp->virtual[j]);
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return (0);
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}
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return (-1);
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}
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static void
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adlink_intr(void *arg)
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{
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struct softc *sc;
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uint32_t u;
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int i, j;
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sc = arg;
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u = bus_space_read_4(sc->t0, sc->h0, 0x38);
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if (!(u & 0x00800000))
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return;
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bus_space_write_4(sc->t0, sc->h0, 0x38, u | 0x003f4000);
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j = sc->idx;
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sc->stat[j] = 1;
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i = (j + 1) % NRING;
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sc->idx = i;
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u = bus_space_read_4(sc->t1, sc->h1, 0x18);
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if (u & 1) {
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printf("adlink FIFO overrun\n");
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return;
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}
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bus_space_write_4(sc->t0, sc->h0, 0x24, sc->pring[i]);
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bus_space_write_4(sc->t0, sc->h0, 0x28, PAGE_SIZE);
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wakeup(sc);
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if (sc->stat[i]) {
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printf("adlink page busy\n");
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}
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}
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static struct cdevsw adlink_cdevsw = {
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.d_version = D_VERSION,
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.d_flags = D_NEEDGIANT,
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.d_open = adlink_open,
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.d_ioctl = adlink_ioctl,
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.d_mmap = adlink_mmap,
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.d_name = "adlink",
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};
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static devclass_t adlink_devclass;
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static int
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adlink_probe(device_t self)
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{
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if (pci_get_devid(self) != 0x80da10e8)
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return (ENXIO);
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device_set_desc(self, "Adlink PCI-9812 4 ch 12 bit 20 msps");
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return (0);
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}
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static int
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adlink_attach(device_t self)
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{
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struct softc *sc;
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int rid, i;
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sc = device_get_softc(self);
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bzero(sc, sizeof *sc);
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sc->device = self;
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/*
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* This is the PCI mapped registers of the AMCC 9535 "matchmaker"
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* chip.
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*/
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rid = 0x10;
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sc->r0 = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
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if (sc->r0 == NULL)
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return(ENODEV);
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sc->t0 = rman_get_bustag(sc->r0);
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sc->h0 = rman_get_bushandle(sc->r0);
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printf("Res0 %x %x\n", sc->t0, sc->h0);
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/*
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* This is the PCI mapped registers of the ADC hardware, they
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* are described in the manual which comes with the card.
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*/
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rid = 0x14;
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sc->r1 = bus_alloc_resource_any(self, SYS_RES_IOPORT, &rid, RF_ACTIVE);
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if (sc->r1 == NULL)
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return(ENODEV);
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sc->t1 = rman_get_bustag(sc->r1);
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sc->h1 = rman_get_bushandle(sc->r1);
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printf("Res1 %x %x\n", sc->t1, sc->h1);
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rid = 0x0;
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sc->ri = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
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RF_ACTIVE | RF_SHAREABLE);
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if (sc->ri == NULL)
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return (ENODEV);
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i = bus_setup_intr(self, sc->ri, INTR_MPSAFE | INTR_TYPE_MISC | INTR_FAST,
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adlink_intr, sc, &sc->intrhand);
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if (i) {
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printf("adlink: Couldn't get FAST intr\n");
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i = bus_setup_intr(self, sc->ri, INTR_TYPE_MISC,
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adlink_intr, sc, &sc->intrhand);
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}
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if (i)
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return (ENODEV);
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sc->dev = make_dev(&adlink_cdevsw, device_get_unit(self),
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UID_ROOT, GID_WHEEL, 0444, "adlink%d", device_get_unit(self));
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sc->dev->si_drv1 = sc;
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return (0);
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}
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static device_method_t adlink_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, adlink_probe),
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DEVMETHOD(device_attach, adlink_attach),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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{0, 0}
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};
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static driver_t adlink_driver = {
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"adlink",
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adlink_methods,
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sizeof(struct softc)
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};
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DRIVER_MODULE(adlink, pci, adlink_driver, adlink_devclass, 0, 0);
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#endif /* _KERNEL */
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