/* * ---------------------------------------------------------------------------- * "THE BEER-WARE LICENSE" (Revision 42): * wrote this file. As long as you retain this notice you * can do whatever you want with this stuff. If we meet some day, and you think * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * * $Id: xrpu.c,v 1.12 1999/05/31 11:29:04 phk Exp $ * * A very simple device driver for PCI cards based on Xilinx 6200 series * FPGA/RPU devices. Current Functionality is to allow you to open and * mmap the entire thing into your program. * * Hardware currently supported: * www.vcc.com HotWorks 1 6216 based card. * */ #include "opt_devfs.h" #include "xrpu.h" #include #include #include #include #include #include #ifdef DEVFS #include #endif #include #include #include static const char* xrpu_probe (pcici_t tag, pcidi_t type); static void xrpu_attach (pcici_t tag, int unit); static u_long xrpu_count; static void xrpu_poll_pps(struct timecounter *tc); /* * Device driver initialization stuff */ static d_open_t xrpu_open; static d_close_t xrpu_close; static d_ioctl_t xrpu_ioctl; static d_mmap_t xrpu_mmap; #define CDEV_MAJOR 100 static struct cdevsw xrpu_cdevsw = { /* open */ xrpu_open, /* close */ xrpu_close, /* read */ noread, /* write */ nowrite, /* ioctl */ xrpu_ioctl, /* stop */ nostop, /* reset */ noreset, /* devtotty */ nodevtotty, /* poll */ nopoll, /* mmap */ xrpu_mmap, /* strategy */ nostrategy, /* name */ "xrpu", /* parms */ noparms, /* maj */ CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ 0, /* maxio */ 0, /* bmaj */ -1 }; static MALLOC_DEFINE(M_XRPU, "xrpu", "XRPU related"); #define dev2unit(devt) (minor(devt) & 0xff) #define dev2pps(devt) ((minor(devt) >> 16)-1) static struct softc { pcici_t tag; enum { NORMAL, TIMECOUNTER } mode; vm_offset_t virbase, physbase; u_int *virbase62; struct timecounter tc; u_int *trigger, *latch, dummy; struct pps_state pps[XRPU_MAX_PPS]; u_int *assert[XRPU_MAX_PPS], *clear[XRPU_MAX_PPS]; } *softc[NXRPU]; static unsigned xrpu_get_timecount(struct timecounter *tc) { struct softc *sc = tc->tc_priv; sc->dummy += *sc->trigger; return (*sc->latch & tc->tc_counter_mask); } void xrpu_poll_pps(struct timecounter *tc) { struct softc *sc = tc->tc_priv; int i; unsigned count1, ppscount; for (i = 0; i < XRPU_MAX_PPS; i++) { if (sc->assert[i]) { ppscount = *(sc->assert[i]) & tc->tc_counter_mask; do { count1 = ppscount; ppscount = *(sc->assert[i]) & tc->tc_counter_mask; } while (ppscount != count1); pps_event(&sc->pps[i], tc, ppscount, PPS_CAPTUREASSERT); } if (sc->clear[i]) { ppscount = *(sc->clear[i]) & tc->tc_counter_mask; do { count1 = ppscount; ppscount = *(sc->clear[i]) & tc->tc_counter_mask; } while (ppscount != count1); pps_event(&sc->pps[i], tc, ppscount, PPS_CAPTURECLEAR); } } } static int xrpu_open(dev_t dev, int flag, int mode, struct proc *p) { return (0); } static int xrpu_close(dev_t dev, int flag, int mode, struct proc *p) { return (0); } static int xrpu_mmap(dev_t dev, vm_offset_t offset, int nprot) { struct softc *sc = softc[dev2unit(dev)]; if (offset >= 0x1000000) return (-1); return (i386_btop(sc->physbase + offset)); } static int xrpu_ioctl(dev_t dev, u_long cmd, caddr_t arg, int flag, struct proc *pr) { struct softc *sc = softc[dev2unit(dev)]; int i, error; if (sc->mode == TIMECOUNTER) { i = dev2pps(dev); if (i < 0 || i >= XRPU_MAX_PPS) return ENODEV; error = pps_ioctl(cmd, arg, &sc->pps[i]); return (error); } if (cmd == XRPU_IOC_TIMECOUNTING) { struct xrpu_timecounting *xt = (struct xrpu_timecounting *)arg; /* Name SHALL be zero terminated */ xt->xt_name[sizeof xt->xt_name - 1] = '\0'; i = strlen(xt->xt_name); sc->tc.tc_name = (char *)malloc(i + 1, M_XRPU, M_WAITOK); strcpy(sc->tc.tc_name, xt->xt_name); sc->tc.tc_frequency = xt->xt_frequency; sc->tc.tc_get_timecount = xrpu_get_timecount; sc->tc.tc_poll_pps = xrpu_poll_pps; sc->tc.tc_priv = sc; sc->tc.tc_counter_mask = xt->xt_mask; sc->trigger = sc->virbase62 + xt->xt_addr_trigger; sc->latch = sc->virbase62 + xt->xt_addr_latch; for (i = 0; i < XRPU_MAX_PPS; i++) { if (xt->xt_pps[i].xt_addr_assert == 0 && xt->xt_pps[i].xt_addr_clear == 0) continue; #ifdef DEVFS devfs_add_devswf(&xrpu_cdevsw, (i+1)<<16, DV_CHR, UID_ROOT, GID_WHEEL, 0600, "xpps%d", i); #endif sc->pps[i].ppscap = 0; if (xt->xt_pps[i].xt_addr_assert) { sc->assert[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_assert; sc->pps[i].ppscap |= PPS_CAPTUREASSERT; } if (xt->xt_pps[i].xt_addr_clear) { sc->clear[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_clear; sc->pps[i].ppscap |= PPS_CAPTURECLEAR; } pps_init(&sc->pps[i]); } sc->mode = TIMECOUNTER; init_timecounter(&sc->tc); return (0); } error = ENOTTY; return (error); } /* * PCI initialization stuff */ static struct pci_device xrpu_device = { "xrpu", xrpu_probe, xrpu_attach, &xrpu_count, NULL }; COMPAT_PCI_DRIVER (xrpu, xrpu_device); static const char* xrpu_probe (pcici_t tag, pcidi_t typea) { u_int id; const char *vendor, *chip, *type; static int once; if (!once++) cdevsw_add(&xrpu_cdevsw); (void)pci_conf_read(tag, PCI_CLASS_REG); id = pci_conf_read(tag, PCI_ID_REG); vendor = chip = type = 0; if (id == 0x6216133e) { return "VCC Hotworks-I xc6216"; } return 0; } static void xrpu_attach (pcici_t tag, int unit) { struct softc *sc; sc = (struct softc *)malloc(sizeof *sc, M_XRPU, M_WAITOK); softc[unit] = sc; bzero(sc, sizeof *sc); sc->tag = tag; sc->mode = NORMAL; pci_map_mem(tag, PCI_MAP_REG_START, &sc->virbase, &sc->physbase); sc->virbase62 = (u_int *)(sc->virbase + 0x800000); if (bootverbose) printf("Mapped physbase %#lx to virbase %#lx\n", (u_long)sc->physbase, (u_long)sc->virbase); #ifdef DEVFS devfs_add_devswf(&xrpu_cdevsw, 0, DV_CHR, UID_ROOT, GID_WHEEL, 0600, "xrpu%d", unit); #endif }