/* $NetBSD: if_iee_gsc.c,v 1.2 2005/12/11 12:17:24 christos Exp $ */ /* * Copyright (c) 2003 Jochen Kunz. * 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 name of Jochen Kunz may not be used to endorse or promote * products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY JOCHEN KUNZ * ``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 JOCHEN KUNZ * 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. */ /* * hp700 GSC bus MD frontend for the iee(4) Intel i82596 Ethernet driver. */ #include __KERNEL_RCSID(0, "$NetBSD: if_iee_gsc.c,v 1.2 2005/12/11 12:17:24 christos Exp $"); /* autoconfig and device stuff */ #include #include #include #include #include #include #include #include "locators.h" #include "ioconf.h" /* bus_space / bus_dma etc. */ #include #include /* general system data and functions */ #include #include #include #include /* tsleep / sleep / wakeup */ #include /* hz for above */ #include /* network stuff */ #include #include #include #include #include #include #include "bpfilter.h" #if NBPFILTER > 0 #include #endif #include #include #define IEE_GSC_IO_SZ 12 #define IEE_GSC_RESET 0 #define IEE_GSC_PORT 4 #define IEE_GSC_CHANATT 8 #define IEE_ISCP_BUSSY 0x1 /* autoconfig stuff */ static int iee_gsc_match(struct device *, struct cfdata *, void *); static void iee_gsc_attach(struct device *, struct device *, void *); static int iee_gsc_detach(struct device*, int); struct iee_gsc_softc { struct iee_softc iee_sc; bus_space_tag_t sc_iot; bus_space_handle_t sc_ioh; void *sc_ih; }; CFATTACH_DECL( iee_gsc, sizeof(struct iee_gsc_softc), iee_gsc_match, iee_gsc_attach, iee_gsc_detach, NULL ); int iee_gsc_cmd(struct iee_softc *, u_int32_t); int iee_gsc_reset(struct iee_softc *); int iee_gsc_cmd(struct iee_softc *sc, u_int32_t cmd) { struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *) sc; int n; SC_SCB->scb_cmd = cmd; bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, BUS_DMASYNC_PREWRITE); /* Issue a Channel Attention to force the chip to read the cmd. */ bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_CHANATT, 0); /* Wait for the cmd to finish */ for (n = 0 ; n < 100000; n++) { DELAY(1); bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, BUS_DMASYNC_PREREAD); if (SC_SCB->scb_cmd == 0) break; } bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, BUS_DMASYNC_PREREAD); if (n < 100000) return(0); printf("%s: iee_gsc_cmd: timeout n=%d\n", sc->sc_dev.dv_xname, n); return(-1); } int iee_gsc_reset(struct iee_softc *sc) { struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *) sc; int n; u_int32_t cmd; /* Make sure the bussy byte is set and the cache is flushed. */ SC_ISCP->iscp_bussy = IEE_ISCP_BUSSY; bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCP_OFF, IEE_SCP_SZ + IEE_ISCP_SZ + IEE_SCB_SZ, BUS_DMASYNC_PREWRITE); /* Setup the PORT Command with pointer to SCP. */ cmd = IEE_PORT_SCP | IEE_PHYS_SHMEM(IEE_SCP_OFF); /* Write a word to IEE_GSC_RESET to initiate a Hardware reset. */ bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_RESET, 0); DELAY(1000); /* Write it to the chip, it wants this in two 16 bit parts. */ if (sc->sc_type == I82596_CA) { bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT, (cmd & 0xffff)); DELAY(1000); bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT, (cmd >> 16)); } else { bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT, (cmd >> 16)); DELAY(1000); bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_PORT, (cmd & 0xffff)); } DELAY(1000); /* Issue a Channel Attention to read SCP */ bus_space_write_4(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_CHANATT, 0); /* Wait for the chip to initialize and read SCP and ISCP. */ for (n = 0 ; n < 1000; n++) { bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, IEE_ISCP_SZ, BUS_DMASYNC_PREREAD); if (SC_ISCP->iscp_bussy != IEE_ISCP_BUSSY) break; DELAY(100); } bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_ISCP_OFF, IEE_ISCP_SZ, BUS_DMASYNC_PREREAD); if (n < 1000) { /* ACK interrupts we may have caused */ (sc->sc_iee_cmd)(sc, IEE_SCB_ACK); return(0); } printf("%s: iee_gsc_reset timeout bussy=0x%x\n", sc->sc_dev.dv_xname, SC_ISCP->iscp_bussy); return(-1); } static int iee_gsc_match(struct device *parent, struct cfdata *match, void *aux) { struct gsc_attach_args *ga = aux; if (ga->ga_type.iodc_type == HPPA_TYPE_FIO && (ga->ga_type.iodc_sv_model == HPPA_FIO_LAN || ga->ga_type.iodc_sv_model == HPPA_FIO_GLAN)) /* beat old ie(4) i82586 driver */ return(10); return(0); } static void iee_gsc_attach(struct device *parent, struct device *self, void *aux) { struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *) self; struct iee_softc *sc = (struct iee_softc *) self; struct gsc_attach_args *ga = aux; char cpu_spec; int media[2]; int rsegs; if (ga->ga_type.iodc_sv_model == HPPA_FIO_LAN) sc->sc_type = I82596_DX; /* ASP(2) based */ else sc->sc_type = I82596_CA; /* LASI based */ sc->sc_flags = IEE_NEED_SWAP; /* * Pre PA7100LC CPUs don't support uncacheable mappings. So make * descriptors align to cache lines. Needed to avoid race conditions * caused by flushing cache lines that overlap multiple descriptors. */ cpu_spec = HPPA_PA_SPEC_LETTER(hppa_cpu_info->hppa_cpu_info_pa_spec); if (cpu_spec == '\0' || cpu_spec == 'a' || cpu_spec == 'b') sc->sc_cl_align = 32; else sc->sc_cl_align = 1; sc_gsc->sc_iot = ga->ga_iot; if (bus_space_map(sc_gsc->sc_iot, ga->ga_hpa, IEE_GSC_IO_SZ, 0, &sc_gsc->sc_ioh)) { aprint_normal(": iee_gsc_attach: can't map I/O space\n"); return; } sc->sc_dmat = ga->ga_dmatag; if (bus_dmamem_alloc(sc->sc_dmat, IEE_SHMEM_MAX, PAGE_SIZE, 0, &sc->sc_dma_segs, 1, &rsegs, BUS_DMA_NOWAIT) != 0) { aprint_normal(": iee_gsc_attach: can't allocate %d bytes of " "DMA memory\n", (int)IEE_SHMEM_MAX); return; } if (bus_dmamem_map(sc->sc_dmat, &sc->sc_dma_segs, rsegs, IEE_SHMEM_MAX, &sc->sc_shmem_addr, BUS_DMA_NOWAIT) != 0) { aprint_normal(": iee_gsc_attach: can't map DMA memory\n"); bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); return; } if (bus_dmamap_create(sc->sc_dmat, IEE_SHMEM_MAX, rsegs, IEE_SHMEM_MAX, 0, BUS_DMA_NOWAIT, &sc->sc_shmem_map) != 0) { aprint_normal(": iee_gsc_attach: can't create DMA map\n"); bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); return; } if (bus_dmamap_load(sc->sc_dmat, sc->sc_shmem_map, sc->sc_shmem_addr, IEE_SHMEM_MAX, NULL, BUS_DMA_NOWAIT) != 0) { aprint_normal(": iee_gsc_attach: can't load DMA map\n"); bus_dmamap_destroy(sc->sc_dmat, sc->sc_shmem_map); bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, rsegs); return; } memset(sc->sc_shmem_addr, 0, IEE_SHMEM_MAX); /* Setup SYSBUS byte. */ SC_SCP->scp_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT | IEE_SYSBUS_TRG | IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD; sc_gsc->sc_ih = hp700_intr_establish(&sc->sc_dev, IPL_NET, iee_intr, sc, ga->ga_int_reg, ga->ga_irq); sc->sc_iee_reset = iee_gsc_reset; sc->sc_iee_cmd = iee_gsc_cmd; sc->sc_mediachange = NULL; sc->sc_mediastatus = NULL; media[0] = IFM_ETHER | IFM_MANUAL; media[1] = IFM_ETHER | IFM_AUTO; iee_attach(sc, ga->ga_ether_address, media, 2, IFM_ETHER | IFM_AUTO); } int iee_gsc_detach(struct device* self, int flags) { struct iee_gsc_softc *sc_gsc = (struct iee_gsc_softc *) self; struct iee_softc *sc = (struct iee_softc *) self; iee_detach(sc, flags); bus_space_unmap(sc_gsc->sc_iot, sc_gsc->sc_ioh, IEE_GSC_IO_SZ); bus_dmamap_unload(sc->sc_dmat, sc->sc_shmem_map); bus_dmamap_destroy(sc->sc_dmat, sc->sc_shmem_map); bus_dmamem_unmap(sc->sc_dmat, sc->sc_shmem_addr, IEE_SHMEM_MAX); bus_dmamem_free(sc->sc_dmat, &sc->sc_dma_segs, 1); /* There is no hp700_intr_disestablish()! */ return(0); }