mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
423 lines
10 KiB
C
423 lines
10 KiB
C
/*-
|
|
* Copyright (c) 2003-2004 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.
|
|
*
|
|
* This is a device driver or the Adlink 9812 and 9810 ADC cards, mainly
|
|
* intended to support Software Defined Radio reception of timesignals
|
|
* in the VLF band. See http://phk.freebsd.dk/loran-c
|
|
*
|
|
* The driver is configured with ioctls which define a ringbuffer with
|
|
* a given number of chunks in it. The a control structure and the
|
|
* ringbuffer can then be mmap(2)'ed into userland and the application
|
|
* can operate on the data directly.
|
|
*
|
|
* Tested with 10MHz external clock, divisor of 2 (ie: 5MHz sampling),
|
|
* One channel active (ie: 2 bytes per sample = 10MB/sec) on a 660MHz
|
|
* Celeron PC.
|
|
*
|
|
*/
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.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>
|
|
|
|
#define ADLINK_SETDIVISOR _IOWR('A', 255, u_int) /* divisor */
|
|
#define ADLINK_SETCHUNKSIZE _IOWR('A', 254, u_int) /* bytes */
|
|
#define ADLINK_SETRINGSIZE _IOWR('A', 253, u_int) /* bytes */
|
|
#define ADLINK_START _IOWR('A', 252, u_int) /* dummy */
|
|
#define ADLINK_STOP _IOWR('A', 251, u_int) /* dummy */
|
|
#define ADLINK_RESET _IOWR('A', 250, u_int) /* dummy */
|
|
|
|
struct page0 {
|
|
u_int version;
|
|
int state;
|
|
# define STATE_RESET -1
|
|
# define STATE_RUN 0
|
|
u_int divisor; /* int */
|
|
u_int chunksize; /* bytes */
|
|
u_int ringsize; /* chunks */
|
|
u_int o_sample; /*
|
|
* offset of ring generation
|
|
* array
|
|
*/
|
|
u_int o_ring; /* offset of ring */
|
|
};
|
|
|
|
#define PAGE0VERSION 20050219
|
|
|
|
#ifdef _KERNEL
|
|
|
|
struct pgstat {
|
|
uint64_t *sample;
|
|
vm_paddr_t phys;
|
|
void *virt;
|
|
struct pgstat *next;
|
|
};
|
|
|
|
struct softc {
|
|
device_t device;
|
|
void *intrhand;
|
|
struct resource *res[3];
|
|
struct cdev *dev;
|
|
off_t mapvir;
|
|
int error;
|
|
struct page0 *p0;
|
|
u_int nchunks;
|
|
struct pgstat *chunks;
|
|
struct pgstat *next;
|
|
uint64_t sample;
|
|
};
|
|
|
|
static d_ioctl_t adlink_ioctl;
|
|
static d_mmap_t adlink_mmap;
|
|
static int adlink_intr(void *arg);
|
|
|
|
static struct cdevsw adlink_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_flags = D_NEEDGIANT,
|
|
.d_ioctl = adlink_ioctl,
|
|
.d_mmap = adlink_mmap,
|
|
.d_name = "adlink",
|
|
};
|
|
|
|
static int
|
|
adlink_intr(void *arg)
|
|
{
|
|
struct softc *sc;
|
|
struct pgstat *pg;
|
|
uint32_t u;
|
|
|
|
sc = arg;
|
|
u = bus_read_4(sc->res[0], 0x38);
|
|
if (!(u & 0x00800000))
|
|
return; // XXX - FILTER_STRAY?
|
|
bus_write_4(sc->res[0], 0x38, u | 0x003f4000);
|
|
|
|
sc->sample += sc->p0->chunksize / 2;
|
|
pg = sc->next;
|
|
*(pg->sample) = sc->sample;
|
|
|
|
u = bus_read_4(sc->res[1], 0x18);
|
|
if (u & 1)
|
|
sc->p0->state = EIO;
|
|
|
|
if (sc->p0->state != STATE_RUN) {
|
|
printf("adlink: stopping %d\n", sc->p0->state);
|
|
return; // XXX - FILTER_STRAY?
|
|
}
|
|
|
|
pg = pg->next;
|
|
sc->next = pg;
|
|
*(pg->sample) = 0;
|
|
bus_write_4(sc->res[0], 0x24, pg->phys);
|
|
bus_write_4(sc->res[0], 0x28, sc->p0->chunksize);
|
|
wakeup(sc);
|
|
return (FILTER_HANDLED);
|
|
}
|
|
|
|
static int
|
|
adlink_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
|
|
{
|
|
struct softc *sc;
|
|
vm_offset_t o;
|
|
int i;
|
|
struct pgstat *pg;
|
|
|
|
sc = dev->si_drv1;
|
|
if (nprot != VM_PROT_READ)
|
|
return (-1);
|
|
if (offset == 0) {
|
|
*paddr = vtophys(sc->p0);
|
|
return (0);
|
|
}
|
|
o = PAGE_SIZE;
|
|
pg = sc->chunks;
|
|
for (i = 0; i < sc->nchunks; i++, pg++) {
|
|
if (offset - o >= sc->p0->chunksize) {
|
|
o += sc->p0->chunksize;
|
|
continue;
|
|
}
|
|
*paddr = pg->phys + (offset - o);
|
|
return (0);
|
|
}
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
adlink_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
|
|
{
|
|
struct softc *sc;
|
|
int i, error;
|
|
u_int u;
|
|
struct pgstat *pg;
|
|
uint64_t *sample;
|
|
|
|
sc = dev->si_drv1;
|
|
u = *(u_int*)data;
|
|
error = 0;
|
|
switch (cmd) {
|
|
case ADLINK_SETDIVISOR:
|
|
if (sc->p0->state == STATE_RUN)
|
|
return (EBUSY);
|
|
if (u & 1)
|
|
return (EINVAL);
|
|
sc->p0->divisor = u;
|
|
break;
|
|
case ADLINK_SETCHUNKSIZE:
|
|
if (sc->p0->state != STATE_RESET)
|
|
return (EBUSY);
|
|
if (u % PAGE_SIZE)
|
|
return (EINVAL);
|
|
if (sc->p0->ringsize != 0 && sc->p0->ringsize % u)
|
|
return (EINVAL);
|
|
sc->p0->chunksize = u;
|
|
break;
|
|
case ADLINK_SETRINGSIZE:
|
|
if (sc->p0->state != STATE_RESET)
|
|
return (EBUSY);
|
|
if (u % PAGE_SIZE)
|
|
return (EINVAL);
|
|
if (sc->p0->chunksize != 0 && u % sc->p0->chunksize)
|
|
return (EINVAL);
|
|
sc->p0->ringsize = u;
|
|
break;
|
|
case ADLINK_START:
|
|
if (sc->p0->state == STATE_RUN)
|
|
return (EBUSY);
|
|
if (sc->p0->state == STATE_RESET) {
|
|
|
|
if (sc->p0->chunksize == 0)
|
|
sc->p0->chunksize = 4 * PAGE_SIZE;
|
|
if (sc->p0->ringsize == 0)
|
|
sc->p0->ringsize = 16 * sc->p0->chunksize;
|
|
if (sc->p0->divisor == 0)
|
|
sc->p0->divisor = 4;
|
|
|
|
sc->nchunks = sc->p0->ringsize / sc->p0->chunksize;
|
|
if (sc->nchunks * sizeof (*pg->sample) +
|
|
sizeof *sc->p0 > PAGE_SIZE)
|
|
return (EINVAL);
|
|
sc->p0->o_ring = PAGE_SIZE;
|
|
sample = (uint64_t *)(sc->p0 + 1);
|
|
sc->p0->o_sample =
|
|
(uintptr_t)sample - (uintptr_t)(sc->p0);
|
|
pg = malloc(sizeof *pg * sc->nchunks,
|
|
M_DEVBUF, M_WAITOK | M_ZERO);
|
|
sc->chunks = pg;
|
|
for (i = 0; i < sc->nchunks; i++) {
|
|
pg->sample = sample;
|
|
*pg->sample = 0;
|
|
sample++;
|
|
pg->virt = contigmalloc(sc->p0->chunksize,
|
|
M_DEVBUF, M_WAITOK,
|
|
0ul, 0xfffffffful,
|
|
PAGE_SIZE, 0);
|
|
pg->phys = vtophys(pg->virt);
|
|
if (i == sc->nchunks - 1)
|
|
pg->next = sc->chunks;
|
|
else
|
|
pg->next = pg + 1;
|
|
pg++;
|
|
}
|
|
sc->next = sc->chunks;
|
|
}
|
|
|
|
/* Reset generation numbers */
|
|
pg = sc->chunks;
|
|
for (i = 0; i < sc->nchunks; i++) {
|
|
*pg->sample = 0;
|
|
pg++;
|
|
}
|
|
|
|
/* Enable interrupts on write complete */
|
|
bus_write_4(sc->res[0], 0x38, 0x00004000);
|
|
|
|
/* Sample CH0 only */
|
|
bus_write_4(sc->res[1], 0x00, 1);
|
|
|
|
/* Divide clock by four */
|
|
bus_write_4(sc->res[1], 0x04, sc->p0->divisor);
|
|
|
|
/* Software trigger mode: software */
|
|
bus_write_4(sc->res[1], 0x08, 0);
|
|
|
|
/* Trigger level zero */
|
|
bus_write_4(sc->res[1], 0x0c, 0);
|
|
|
|
/* Trigger source CH0 (not used) */
|
|
bus_write_4(sc->res[1], 0x10, 0);
|
|
|
|
/* Fifo control/status: flush */
|
|
bus_write_4(sc->res[1], 0x18, 3);
|
|
|
|
/* Clock source: external sine */
|
|
bus_write_4(sc->res[1], 0x20, 2);
|
|
|
|
/* Chipmunks are go! */
|
|
sc->p0->state = STATE_RUN;
|
|
|
|
/* Set up Write DMA */
|
|
pg = sc->next = sc->chunks;
|
|
*(pg->sample) = 0;
|
|
bus_write_4(sc->res[0], 0x24, pg->phys);
|
|
bus_write_4(sc->res[0], 0x28, sc->p0->chunksize);
|
|
u = bus_read_4(sc->res[0], 0x3c);
|
|
bus_write_4(sc->res[0], 0x3c, u | 0x00000600);
|
|
|
|
/* Acquisition Enable Register: go! */
|
|
bus_write_4(sc->res[1], 0x1c, 1);
|
|
|
|
break;
|
|
case ADLINK_STOP:
|
|
if (sc->p0->state == STATE_RESET)
|
|
break;
|
|
sc->p0->state = EINTR;
|
|
while (*(sc->next->sample) == 0)
|
|
tsleep(sc, PUSER | PCATCH, "adstop", 1);
|
|
break;
|
|
#ifdef notyet
|
|
/*
|
|
* I'm not sure we can actually do this. How do we revoke
|
|
* the mmap'ed pages from any process having them mmapped ?
|
|
*/
|
|
case ADLINK_RESET:
|
|
if (sc->p0->state == STATE_RESET)
|
|
break;
|
|
sc->p0->state = EINTR;
|
|
while (*(sc->next->samp) == 0)
|
|
tsleep(sc, PUSER | PCATCH, "adreset", 1);
|
|
/* deallocate ring buffer */
|
|
break;
|
|
#endif
|
|
default:
|
|
error = ENOIOCTL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
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 (BUS_PROBE_DEFAULT);
|
|
}
|
|
|
|
static struct resource_spec adlink_res_spec[] = {
|
|
{ SYS_RES_IOPORT, PCIR_BAR(0), RF_ACTIVE},
|
|
{ SYS_RES_IOPORT, PCIR_BAR(1), RF_ACTIVE},
|
|
{ SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE},
|
|
{ -1, 0, 0 }
|
|
};
|
|
|
|
static int
|
|
adlink_attach(device_t self)
|
|
{
|
|
struct softc *sc;
|
|
int i, error;
|
|
|
|
sc = device_get_softc(self);
|
|
bzero(sc, sizeof *sc);
|
|
sc->device = self;
|
|
|
|
error = bus_alloc_resources(self, adlink_res_spec, sc->res);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* XXX why do we need INTR_MPSAFE if INTR_FAST was declared too?!?!? */
|
|
i = bus_setup_intr(self, sc->res[2],
|
|
INTR_MPSAFE | INTR_TYPE_MISC,
|
|
adlink_intr, NULL, sc, &sc->intrhand);
|
|
if (i) {
|
|
printf("adlink: Couldn't get FAST intr\n");
|
|
i = bus_setup_intr(self, sc->res[2],
|
|
INTR_MPSAFE | INTR_TYPE_MISC,
|
|
NULL, (driver_intr_t *)adlink_intr, sc, &sc->intrhand);
|
|
}
|
|
|
|
if (i) {
|
|
bus_release_resources(self, adlink_res_spec, sc->res);
|
|
return (ENODEV);
|
|
}
|
|
|
|
sc->p0 = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK | M_ZERO);
|
|
sc->p0->version = PAGE0VERSION;
|
|
sc->p0->state = STATE_RESET;
|
|
|
|
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 */
|