/* $NetBSD: if_iee_sbdio.c,v 1.5 2008/04/04 17:03:42 tsutsui 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. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: if_iee_sbdio.c,v 1.5 2008/04/04 17:03:42 tsutsui Exp $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/device.h> #include <net/if.h> #include <net/if_dl.h> #include <net/if_media.h> #include <net/if_ether.h> #include <sys/socket.h> #include <sys/mbuf.h> #include <mips/cache.h> #include <machine/bus.h> #include <machine/intr.h> #include <machine/sbdvar.h> /* for ether_addr() */ #include <machine/sbdiovar.h> #include <dev/ic/i82596reg.h> #include <dev/ic/i82596var.h> int iee_sbdio_match(device_t, cfdata_t, void *); void iee_sbdio_attach(device_t, device_t, void *); int iee_sbdio_cmd(struct iee_softc *, uint32_t); int iee_sbdio_reset(struct iee_softc *); static void iee_sbdio_channel_attention(void *); static void iee_sbdio_chip_reset(void *); static void iee_sbdio_set_scp(void *, uint32_t); struct iee_sbdio_softc { struct iee_softc sc_iee; /* CPU <-> i82589 interface */ volatile uint32_t *sc_port; }; CFATTACH_DECL_NEW(iee_sbdio, sizeof(struct iee_sbdio_softc), iee_sbdio_match, iee_sbdio_attach, NULL, NULL); int iee_sbdio_match(device_t parent, cfdata_t cf, void *aux) { struct sbdio_attach_args *sa = aux; return strcmp(sa->sa_name, "iee") ? 0 : 1; } void iee_sbdio_attach(device_t parent, device_t self, void *aux) { struct iee_sbdio_softc *sc_ssc = device_private(self); struct iee_softc *sc = &sc_ssc->sc_iee; struct sbdio_attach_args *sa = aux; uint8_t eaddr[ETHER_ADDR_LEN]; int media[2]; int rsegs; sc->sc_dev = self; sc_ssc->sc_port = (volatile uint32_t *)MIPS_PHYS_TO_KSEG1(sa->sa_addr1); sc->sc_type = I82596_CA; sc->sc_flags = IEE_NEED_SWAP; /* bus_dma round the dma size to page size. */ sc->sc_cl_align = 1; sc->sc_dmat = sa->sa_dmat; if (bus_dmamem_alloc(sc->sc_dmat, IEE_SHMEM_MAX, PAGE_SIZE, 0, &sc->sc_dma_segs, 1, &rsegs, BUS_DMA_NOWAIT) != 0) { aprint_error(": iee_sbdio_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, (void **)sc->sc_shmem_addr, BUS_DMA_NOWAIT) != 0) { aprint_error(": iee_sbdio_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_error(": iee_sbdio_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_error(": iee_sbdio_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); mips_dcache_wbinv_range((vaddr_t)sc->sc_shmem_addr, IEE_SHMEM_MAX); sc->sc_shmem_addr = (void *)((vaddr_t)sc->sc_shmem_addr | MIPS_KSEG1_START); /* Setup SYSBUS byte. TR2 specific? -uch */ SC_SCP->scp_sysbus = IEE_SYSBUS_BE | IEE_SYSBUS_INT | IEE_SYSBUS_LIEAR | IEE_SYSBUS_STD; sc->sc_iee_reset = iee_sbdio_reset; sc->sc_iee_cmd = iee_sbdio_cmd; sc->sc_mediachange = NULL; sc->sc_mediastatus = NULL; media[0] = IFM_ETHER | IFM_MANUAL; media[1] = IFM_ETHER | IFM_10_5; intr_establish(sa->sa_irq, iee_intr, sc); (*platform.ether_addr)(eaddr); iee_attach(sc, eaddr, media, 2, IFM_ETHER | IFM_10_5); } int iee_sbdio_cmd(struct iee_softc *sc, uint32_t cmd) { int retry = 8; 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); iee_sbdio_channel_attention(sc); /* Wait for the cmd to finish */ for (n = 0 ; n < retry; n++) { 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; delay(1); } bus_dmamap_sync(sc->sc_dmat, sc->sc_shmem_map, IEE_SCB_OFF, IEE_SCB_SZ, BUS_DMASYNC_PREREAD); if (n < retry) return 0; printf("%s: command timeout. retry=%d\n", device_xname(sc->sc_dev), retry); return -1; } int iee_sbdio_reset(struct iee_softc *sc) { #define IEE_ISCP_BUSSY 0x1 int n, retry = 8; uint32_t cmd; /* Make sure the busy 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); /* Initiate a Hardware reset. */ printf("%s: reseting chip... ", device_xname(sc->sc_dev)); iee_sbdio_chip_reset(sc); /* Set SCP address to CU */ iee_sbdio_set_scp(sc, cmd); /* Wait for the chip to initialize and read SCP and ISCP. */ for (n = 0 ; n < retry; 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_SCB_OFF, IEE_SCB_SZ, BUS_DMASYNC_PREREAD); if (n < retry) { /* ACK interrupts we may have caused */ sc->sc_iee_cmd(sc, IEE_SCB_ACK); printf("done.\n"); return 0; } printf("time out.\n"); return -1; } static void iee_sbdio_channel_attention(void *cookie) { struct iee_sbdio_softc *sc = cookie; uint32_t dummy; /* Issue a Channel Attention */ dummy = *sc->sc_port; dummy = *sc->sc_port; } static void iee_sbdio_chip_reset(void *cookie) { struct iee_sbdio_softc *sc = cookie; *sc->sc_port = 0; *sc->sc_port = 0; delay(10); } static void iee_sbdio_set_scp(void *cookie, uint32_t cmd) { struct iee_sbdio_softc *sc = cookie; cmd = (cmd << 16) | (cmd >> 16); *sc->sc_port = cmd; *sc->sc_port = cmd; /* Issue a Channel Attention to read SCP */ iee_sbdio_channel_attention(cookie); }