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