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