7ac40f5f59
branches: Initialize struct cdevsw using C99 sparse initializtion and remove all initializations to default values. This patch is automatically generated and has been tested by compiling LINT with all the fields in struct cdevsw in reverse order on alpha, sparc64 and i386. Approved by: re(scottl)
266 lines
6.4 KiB
C
266 lines
6.4 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* $FreeBSD$
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*
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* A very simple device driver for PCI cards based on Xilinx 6200 series
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* FPGA/RPU devices. Current Functionality is to allow you to open and
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* mmap the entire thing into your program.
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*
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* Hardware currently supported:
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* www.vcc.com HotWorks 1 6216 based card.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/timetc.h>
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#include <sys/timepps.h>
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#include <sys/xrpuio.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include "pci_if.h"
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/*
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* Device driver initialization stuff
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*/
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static d_open_t xrpu_open;
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static d_close_t xrpu_close;
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static d_ioctl_t xrpu_ioctl;
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static d_mmap_t xrpu_mmap;
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#define CDEV_MAJOR 100
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static struct cdevsw xrpu_cdevsw = {
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.d_open = xrpu_open,
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.d_close = xrpu_close,
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.d_ioctl = xrpu_ioctl,
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.d_mmap = xrpu_mmap,
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.d_name = "xrpu",
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.d_maj = CDEV_MAJOR,
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};
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static MALLOC_DEFINE(M_XRPU, "xrpu", "XRPU related");
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static devclass_t xrpu_devclass;
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#define dev2unit(devt) (minor(devt) & 0xff)
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#define dev2pps(devt) ((minor(devt) >> 16)-1)
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struct softc {
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enum { NORMAL, TIMECOUNTER } mode;
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vm_offset_t virbase, physbase;
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u_int *virbase62;
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struct timecounter tc;
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u_int *trigger, *latch, dummy;
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struct pps_state pps[XRPU_MAX_PPS];
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u_int *assert[XRPU_MAX_PPS], *clear[XRPU_MAX_PPS];
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};
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static unsigned
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xrpu_get_timecount(struct timecounter *tc)
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{
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struct softc *sc = tc->tc_priv;
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sc->dummy += *sc->trigger;
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return (*sc->latch & tc->tc_counter_mask);
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}
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static void
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xrpu_poll_pps(struct timecounter *tc)
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{
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struct softc *sc = tc->tc_priv;
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int i, j;
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unsigned count1, ppscount;
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for (i = 0; i < XRPU_MAX_PPS; i++) {
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if (sc->assert[i]) {
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pps_capture(&sc->pps[i]);
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ppscount = *(sc->assert[i]) & tc->tc_counter_mask;
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j = 0;
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do {
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count1 = ppscount;
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ppscount = *(sc->assert[i]) & tc->tc_counter_mask;
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} while (ppscount != count1 && ++j < 5);
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sc->pps[i].capcount = ppscount;
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pps_event(&sc->pps[i], PPS_CAPTUREASSERT);
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}
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if (sc->clear[i]) {
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pps_capture(&sc->pps[i]);
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j = 0;
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ppscount = *(sc->clear[i]) & tc->tc_counter_mask;
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do {
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count1 = ppscount;
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ppscount = *(sc->clear[i]) & tc->tc_counter_mask;
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} while (ppscount != count1 && ++j < 5);
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sc->pps[i].capcount = ppscount;
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pps_event(&sc->pps[i], PPS_CAPTURECLEAR);
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}
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}
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}
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static int
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xrpu_open(dev_t dev, int flag, int mode, struct thread *td)
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{
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struct softc *sc = devclass_get_softc(xrpu_devclass, dev2unit(dev));
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if (!sc)
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return (ENXIO);
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dev->si_drv1 = sc;
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return (0);
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}
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static int
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xrpu_close(dev_t dev, int flag, int mode, struct thread *td)
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{
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return (0);
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}
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static int
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xrpu_mmap(dev_t dev, vm_offset_t offset, vm_offset_t *paddr, int nprot)
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{
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struct softc *sc = dev->si_drv1;
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if (offset >= 0x1000000)
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return (-1);
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*paddr = sc->physbase + offset;
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return (0);
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}
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static int
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xrpu_ioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct thread *tdr)
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{
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struct softc *sc = dev->si_drv1;
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int i, error;
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if (sc->mode == TIMECOUNTER) {
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i = dev2pps(dev);
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if (i < 0 || i >= XRPU_MAX_PPS)
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return ENODEV;
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error = pps_ioctl(cmd, arg, &sc->pps[i]);
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return (error);
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}
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if (cmd == XRPU_IOC_TIMECOUNTING) {
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struct xrpu_timecounting *xt = (struct xrpu_timecounting *)arg;
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/* Name SHALL be zero terminated */
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xt->xt_name[sizeof xt->xt_name - 1] = '\0';
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i = strlen(xt->xt_name);
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sc->tc.tc_name = (char *)malloc(i + 1, M_XRPU, M_WAITOK);
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strcpy(sc->tc.tc_name, xt->xt_name);
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sc->tc.tc_frequency = xt->xt_frequency;
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sc->tc.tc_get_timecount = xrpu_get_timecount;
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sc->tc.tc_poll_pps = xrpu_poll_pps;
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sc->tc.tc_priv = sc;
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sc->tc.tc_counter_mask = xt->xt_mask;
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sc->trigger = sc->virbase62 + xt->xt_addr_trigger;
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sc->latch = sc->virbase62 + xt->xt_addr_latch;
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for (i = 0; i < XRPU_MAX_PPS; i++) {
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if (xt->xt_pps[i].xt_addr_assert == 0
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&& xt->xt_pps[i].xt_addr_clear == 0)
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continue;
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make_dev(&xrpu_cdevsw, (i+1)<<16,
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UID_ROOT, GID_WHEEL, 0600, "xpps%d", i);
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sc->pps[i].ppscap = 0;
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if (xt->xt_pps[i].xt_addr_assert) {
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sc->assert[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_assert;
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sc->pps[i].ppscap |= PPS_CAPTUREASSERT;
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}
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if (xt->xt_pps[i].xt_addr_clear) {
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sc->clear[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_clear;
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sc->pps[i].ppscap |= PPS_CAPTURECLEAR;
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}
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pps_init(&sc->pps[i]);
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}
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sc->mode = TIMECOUNTER;
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tc_init(&sc->tc);
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return (0);
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}
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error = ENOTTY;
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return (error);
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}
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/*
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* PCI initialization stuff
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*/
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static int
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xrpu_probe(device_t self)
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{
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char *desc;
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desc = NULL;
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switch (pci_get_devid(self)) {
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case 0x6216133e:
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desc = "VCC Hotworks-I xc6216";
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break;
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}
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if (desc == NULL)
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return ENXIO;
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device_set_desc(self, desc);
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return 0;
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}
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static int
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xrpu_attach(device_t self)
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{
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struct softc *sc;
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struct resource *res;
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int rid, unit;
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unit = device_get_unit(self);
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sc = device_get_softc(self);
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sc->mode = NORMAL;
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rid = PCIR_MAPS;
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res = bus_alloc_resource(self, SYS_RES_MEMORY, &rid,
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0, ~0, 1, RF_ACTIVE);
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if (res == NULL) {
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device_printf(self, "Could not map memory\n");
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return ENXIO;
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}
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sc->virbase = (vm_offset_t)rman_get_virtual(res);
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sc->physbase = rman_get_start(res);
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sc->virbase62 = (u_int *)(sc->virbase + 0x800000);
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if (bootverbose)
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printf("Mapped physbase %#lx to virbase %#lx\n",
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(u_long)sc->physbase, (u_long)sc->virbase);
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make_dev(&xrpu_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "xrpu%d", unit);
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return 0;
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}
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static device_method_t xrpu_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, xrpu_probe),
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DEVMETHOD(device_attach, xrpu_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 xrpu_driver = {
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"xrpu",
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xrpu_methods,
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sizeof(struct softc)
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};
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DRIVER_MODULE(xrpu, pci, xrpu_driver, xrpu_devclass, 0, 0);
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