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freebsd-skq/sys/dev/adlink/adlink.c
Warner Losh 329e817fcc Reapply, with minor tweaks, r338025, from the original commit: 
Remove unused and easy to misuse PNP macro parameter

Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely.  The 'table' parameter is now required to
have correct pointer (or array) type.  Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.

Mostly done with the coccinelle 'spatch' tool:

  $ cat modpnpsize0.cocci
    @normaltables@
    identifier b,c;
    expression a,d,e;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,d,
    -sizeof(d[0]),
     e);

    @singletons@
    identifier b,c,d;
    expression a;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,&d,
    -sizeof(d),
     1);

  $ rg -l MODULE_PNP_INFO -- sys | \
    xargs spatch --in-place --sp-file modpnpsize0.cocci

(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not.  So I had to link gdiff into
PATH as diff to use spatch.)

Tinderbox'd (-DMAKE_JUST_KERNELS).
Approved by: re (glen)
2018-09-26 17:12:14 +00:00

444 lines
11 KiB
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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 (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 (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_ooffset_t offset, vm_paddr_t *paddr,
int nprot, vm_memattr_t *memattr)
{
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;
struct pci_id
{
uint16_t vendor;
uint16_t device;
const char *desc;
} adlink_id[] = {
{ .vendor = 0x10e8, .device = 0x80da,
.desc ="Adlink PCI-9812 4 ch 12 bit 20 msps" }
};
static int
adlink_probe(device_t self)
{
int i;
uint16_t vendor, device;
vendor = pci_get_vendor(self);
device = pci_get_device(self);
for (i = 0; i < nitems(adlink_id); i++) {
if (adlink_id[i].vendor == vendor &&
adlink_id[i].device == device) {
device_set_desc(self, adlink_id[i].desc);
return (BUS_PROBE_DEFAULT);
}
}
return (ENXIO);
}
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);
i = bus_setup_intr(self, sc->res[2], 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),
DEVMETHOD_END
};
static driver_t adlink_driver = {
"adlink",
adlink_methods,
sizeof(struct softc)
};
DRIVER_MODULE(adlink, pci, adlink_driver, adlink_devclass, 0, 0);
MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, adlink, adlink_id,
nitems(adlink_id));
#endif /* _KERNEL */
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