diff options
Diffstat (limited to 'bsd_eth_drivers/if_le/if_le_ledma.c')
| -rw-r--r-- | bsd_eth_drivers/if_le/if_le_ledma.c | 490 |
1 files changed, 490 insertions, 0 deletions
diff --git a/bsd_eth_drivers/if_le/if_le_ledma.c b/bsd_eth_drivers/if_le/if_le_ledma.c new file mode 100644 index 0000000..248b8a0 --- /dev/null +++ b/bsd_eth_drivers/if_le/if_le_ledma.c @@ -0,0 +1,490 @@ +/* $NetBSD: if_le_ledma.c,v 1.26 2005/12/11 12:23:44 christos Exp $ */ + +/*- + * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Charles M. Hannum; Jason R. Thorpe of the Numerical Aerospace + * Simulation Facility, NASA Ames Research Center; Paul Kranenburg. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/sys/dev/le/if_le_ledma.c,v 1.4 2007/02/23 12:18:45 piso Exp $"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/endian.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/module.h> +#include <sys/mutex.h> +#include <sys/resource.h> +#include <sys/rman.h> +#include <sys/socket.h> + +#include <dev/ofw/ofw_bus.h> + +#include <machine/bus.h> +#include <machine/ofw_machdep.h> +#include <machine/resource.h> + +#include <net/ethernet.h> +#include <net/if.h> +#include <net/if_media.h> + +#include <sparc64/sbus/lsi64854reg.h> +#include <sparc64/sbus/lsi64854var.h> + +#include <dev/le/lancereg.h> +#include <dev/le/lancevar.h> +#include <dev/le/am7990var.h> + +#define LEDMA_ALIGNMENT 8 /* ring desc. alignmet for NCR92C990 */ +#define LEDMA_BOUNDARY (16*1024*1024) /* must not cross 16MB boundary */ +#define LEDMA_MEMSIZE (16*1024) /* LANCE memory size */ +#define LEREG1_RDP 0 /* Register Data Port */ +#define LEREG1_RAP 2 /* Register Address Port */ + +struct le_dma_softc { + struct am7990_softc sc_am7990; /* glue to MI code */ + + int sc_rrid; + struct resource *sc_rres; + bus_space_tag_t sc_regt; + bus_space_handle_t sc_regh; + + int sc_irid; + struct resource *sc_ires; + void *sc_ih; + + bus_dma_tag_t sc_dmat; + bus_dmamap_t sc_dmam; + bus_addr_t sc_laddr; /* LANCE DMA address */ + + struct lsi64854_softc *sc_dma; /* pointer to DMA engine */ +}; + +static device_probe_t le_dma_probe; +static device_attach_t le_dma_attach; +static device_detach_t le_dma_detach; +static device_resume_t le_dma_resume; +static device_suspend_t le_dma_suspend; + +static device_method_t le_dma_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, le_dma_probe), + DEVMETHOD(device_attach, le_dma_attach), + DEVMETHOD(device_detach, le_dma_detach), + /* We can just use the suspend method here. */ + DEVMETHOD(device_shutdown, le_dma_suspend), + DEVMETHOD(device_suspend, le_dma_suspend), + DEVMETHOD(device_resume, le_dma_resume), + + { 0, 0 } +}; + +DEFINE_CLASS_0(le, le_dma_driver, le_dma_methods, sizeof(struct le_dma_softc)); +DRIVER_MODULE(le, dma, le_dma_driver, le_devclass, 0, 0); +MODULE_DEPEND(le, ether, 1, 1, 1); + +/* + * Media types supported + */ +static const int le_dma_supmedia[] = { + IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0), + IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0), + IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0) +}; + +static void le_dma_wrcsr(struct lance_softc *, uint16_t, uint16_t); +static uint16_t le_dma_rdcsr(struct lance_softc *, uint16_t); +static void le_dma_setutp(struct lance_softc *); +static void le_dma_setaui(struct lance_softc *); +static int le_dma_supmediachange(struct lance_softc *); +static void le_dma_supmediastatus(struct lance_softc *, struct ifmediareq *); +static void le_dma_hwreset(struct lance_softc *); +static int le_dma_hwintr(struct lance_softc *); +static void le_dma_nocarrier(struct lance_softc *); +static bus_dmamap_callback_t le_dma_dma_callback; + +static void +le_dma_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)sc; + + bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port); + bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2, + BUS_SPACE_BARRIER_WRITE); + bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP, val); +} + +static uint16_t +le_dma_rdcsr(struct lance_softc *sc, uint16_t port) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)sc; + + bus_space_write_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, port); + bus_space_barrier(lesc->sc_regt, lesc->sc_regh, LEREG1_RAP, 2, + BUS_SPACE_BARRIER_WRITE); + return (bus_space_read_2(lesc->sc_regt, lesc->sc_regh, LEREG1_RDP)); +} + +static void +le_dma_setutp(struct lance_softc *sc) +{ + struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; + + L64854_SCSR(dma, L64854_GCSR(dma) | E_TP_AUI); + DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ +} + +static void +le_dma_setaui(struct lance_softc *sc) +{ + struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; + + L64854_SCSR(dma, L64854_GCSR(dma) & ~E_TP_AUI); + DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ +} + +static int +le_dma_supmediachange(struct lance_softc *sc) +{ + struct ifmedia *ifm = &sc->sc_media; + + if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) + return (EINVAL); + + /* + * Switch to the selected media. If autoselect is set, we don't + * really have to do anything. We'll switch to the other media + * when we detect loss of carrier. + */ + switch (IFM_SUBTYPE(ifm->ifm_media)) { + case IFM_10_T: + le_dma_setutp(sc); + break; + + case IFM_10_5: + le_dma_setaui(sc); + break; + + case IFM_AUTO: + break; + + default: + return (EINVAL); + } + + return (0); +} + +static void +le_dma_supmediastatus(struct lance_softc *sc, struct ifmediareq *ifmr) +{ + struct lsi64854_softc *dma = ((struct le_dma_softc *)sc)->sc_dma; + + /* + * Notify the world which media we're currently using. + */ + if (L64854_GCSR(dma) & E_TP_AUI) + ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0); + else + ifmr->ifm_active = IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, 0); +} + +static void +le_dma_hwreset(struct lance_softc *sc) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)sc; + struct lsi64854_softc *dma = lesc->sc_dma; + uint32_t aui_bit, csr; + + /* + * Reset DMA channel. + */ + csr = L64854_GCSR(dma); + aui_bit = csr & E_TP_AUI; + DMA_RESET(dma); + + /* Write bits 24-31 of Lance address. */ + bus_space_write_4(dma->sc_regt, dma->sc_regh, L64854_REG_ENBAR, + lesc->sc_laddr & 0xff000000); + + DMA_ENINTR(dma); + + /* + * Disable E-cache invalidates on chip writes. + * Retain previous cable selection bit. + */ + csr = L64854_GCSR(dma); + csr |= (E_DSBL_WR_INVAL | aui_bit); + L64854_SCSR(dma, csr); + DELAY(20000); /* We must not touch the LANCE chip for 20ms. */ +} + +static int +le_dma_hwintr(struct lance_softc *sc) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)sc; + struct lsi64854_softc *dma = lesc->sc_dma; + + return (DMA_INTR(dma)); +} + +static void +le_dma_nocarrier(struct lance_softc *sc) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)sc; + + /* + * Check if the user has requested a certain cable type, and + * if so, honor that request. + */ + + if (L64854_GCSR(lesc->sc_dma) & E_TP_AUI) { + switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { + case IFM_10_5: + case IFM_AUTO: + if_printf(sc->sc_ifp, "lost carrier on UTP port, " + "switching to AUI port\n"); + le_dma_setaui(sc); + } + } else { + switch (IFM_SUBTYPE(sc->sc_media.ifm_media)) { + case IFM_10_T: + case IFM_AUTO: + if_printf(sc->sc_ifp, "lost carrier on AUI port, " + "switching to UTP port\n"); + le_dma_setutp(sc); + } + } +} + +static void +le_dma_dma_callback(void *xsc, bus_dma_segment_t *segs, int nsegs, int error) +{ + struct le_dma_softc *lesc = (struct le_dma_softc *)xsc; + + if (error != 0) + return; + KASSERT(nsegs == 1, ("%s: bad DMA segment count", __func__)); + lesc->sc_laddr = segs[0].ds_addr; +} + +static int +le_dma_probe(device_t dev) +{ + + if (strcmp(ofw_bus_get_name(dev), "le") == 0) { + device_set_desc(dev, "LANCE Ethernet"); + return (BUS_PROBE_DEFAULT); + } + return (ENXIO); +} + +static int +le_dma_attach(device_t dev) +{ + struct le_dma_softc *lesc; + struct lsi64854_softc *dma; + struct lance_softc *sc; + int error; + + lesc = device_get_softc(dev); + sc = &lesc->sc_am7990.lsc; + + LE_LOCK_INIT(sc, device_get_nameunit(dev)); + + /* + * Establish link to `ledma' device. + * XXX hackery. + */ + dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev)); + lesc->sc_dma = dma; + lesc->sc_dma->sc_client = lesc; + + lesc->sc_rrid = 0; + lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, + &lesc->sc_rrid, RF_ACTIVE); + if (lesc->sc_rres == NULL) { + device_printf(dev, "cannot allocate registers\n"); + error = ENXIO; + goto fail_mtx; + } + lesc->sc_regt = rman_get_bustag(lesc->sc_rres); + lesc->sc_regh = rman_get_bushandle(lesc->sc_rres); + + lesc->sc_irid = 0; + if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ, + &lesc->sc_irid, RF_SHAREABLE | RF_ACTIVE)) == NULL) { + device_printf(dev, "cannot allocate interrupt\n"); + error = ENXIO; + goto fail_rres; + } + + sc->sc_memsize = LEDMA_MEMSIZE; + error = bus_dma_tag_create( + dma->sc_parent_dmat, /* parent */ + LEDMA_ALIGNMENT, /* alignment */ + LEDMA_BOUNDARY, /* boundary */ + BUS_SPACE_MAXADDR_32BIT, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + sc->sc_memsize, /* maxsize */ + 1, /* nsegments */ + sc->sc_memsize, /* maxsegsize */ + 0, /* flags */ + NULL, NULL, /* lockfunc, lockarg */ + &lesc->sc_dmat); + if (error != 0) { + device_printf(dev, "cannot allocate buffer DMA tag\n"); + goto fail_ires; + } + + error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem, + BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam); + if (error != 0) { + device_printf(dev, "cannot allocate DMA buffer memory\n"); + goto fail_dtag; + } + + lesc->sc_laddr = 0; + error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem, + sc->sc_memsize, le_dma_dma_callback, lesc, 0); + if (error != 0 || lesc->sc_laddr == 0) { + device_printf(dev, "cannot load DMA buffer map\n"); + goto fail_dmem; + } + + sc->sc_addr = lesc->sc_laddr & 0xffffff; + sc->sc_flags = 0; + sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON; + + sc->sc_mediachange = le_dma_supmediachange; + sc->sc_mediastatus = le_dma_supmediastatus; + sc->sc_supmedia = le_dma_supmedia; + sc->sc_nsupmedia = sizeof(le_dma_supmedia) / sizeof(le_dma_supmedia[0]); + sc->sc_defaultmedia = le_dma_supmedia[0]; + + OF_getetheraddr(dev, sc->sc_enaddr); + + sc->sc_copytodesc = lance_copytobuf_contig; + sc->sc_copyfromdesc = lance_copyfrombuf_contig; + sc->sc_copytobuf = lance_copytobuf_contig; + sc->sc_copyfrombuf = lance_copyfrombuf_contig; + sc->sc_zerobuf = lance_zerobuf_contig; + + sc->sc_rdcsr = le_dma_rdcsr; + sc->sc_wrcsr = le_dma_wrcsr; + sc->sc_hwreset = le_dma_hwreset; + sc->sc_hwintr = le_dma_hwintr; + sc->sc_nocarrier = le_dma_nocarrier; + + error = am7990_config(&lesc->sc_am7990, device_get_name(dev), + device_get_unit(dev)); + if (error != 0) { + device_printf(dev, "cannot attach Am7990\n"); + goto fail_dmap; + } + + error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE, + NULL, am7990_intr, sc, &lesc->sc_ih); + if (error != 0) { + device_printf(dev, "cannot set up interrupt\n"); + goto fail_am7990; + } + + return (0); + + fail_am7990: + am7990_detach(&lesc->sc_am7990); + fail_dmap: + bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam); + fail_dmem: + bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam); + fail_dtag: + bus_dma_tag_destroy(lesc->sc_dmat); + fail_ires: + bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires); + fail_rres: + bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres); + fail_mtx: + LE_LOCK_DESTROY(sc); + return (error); +} + +static int +le_dma_detach(device_t dev) +{ + struct le_dma_softc *lesc; + struct lance_softc *sc; + + lesc = device_get_softc(dev); + sc = &lesc->sc_am7990.lsc; + + bus_teardown_intr(dev, lesc->sc_ires, lesc->sc_ih); + am7990_detach(&lesc->sc_am7990); + bus_dmamap_unload(lesc->sc_dmat, lesc->sc_dmam); + bus_dmamem_free(lesc->sc_dmat, sc->sc_mem, lesc->sc_dmam); + bus_dma_tag_destroy(lesc->sc_dmat); + bus_release_resource(dev, SYS_RES_IRQ, lesc->sc_irid, lesc->sc_ires); + bus_release_resource(dev, SYS_RES_MEMORY, lesc->sc_rrid, lesc->sc_rres); + LE_LOCK_DESTROY(sc); + + return (0); +} + +static int +le_dma_suspend(device_t dev) +{ + struct le_dma_softc *lesc; + + lesc = device_get_softc(dev); + + lance_suspend(&lesc->sc_am7990.lsc); + + return (0); +} + +static int +le_dma_resume(device_t dev) +{ + struct le_dma_softc *lesc; + + lesc = device_get_softc(dev); + + lance_resume(&lesc->sc_am7990.lsc); + + return (0); +} |