/* $NetBSD: if_ie_obio.c,v 1.41 2013/10/19 19:40:23 mrg Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by 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. * * 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. */ /* * Copyright (c) 1995 Charles D. Cranor * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ /* * Sparc OBIO front-end for the Intel 82586 Ethernet driver * * Converted to SUN ie driver by Charles D. Cranor, * October 1994, January 1995. */ /* * The i82586 is a very painful chip, found in sun3's, sun-4/100's * sun-4/200's, and VME based suns. The byte order is all wrong for a * SUN, making life difficult. Programming this chip is mostly the same, * but certain details differ from system to system. This driver is * written so that different "ie" interfaces can be controled by the same * driver. */ #include __KERNEL_RCSID(0, "$NetBSD: if_ie_obio.c,v 1.41 2013/10/19 19:40:23 mrg Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * the on-board interface */ struct ieob { u_char obctrl; }; #define IEOB_NORSET 0x80 /* don't reset the board */ #define IEOB_ONAIR 0x40 /* put us on the air */ #define IEOB_ATTEN 0x20 /* attention! */ #define IEOB_IENAB 0x10 /* interrupt enable */ #define IEOB_XXXXX 0x08 /* free bit */ #define IEOB_XCVRL2 0x04 /* level 2 transceiver? */ #define IEOB_BUSERR 0x02 /* bus error */ #define IEOB_INT 0x01 /* interrupt */ #define IEOB_ADBASE 0xff000000 /* KVA base addr of 24 bit address space */ static void ie_obreset(struct ie_softc *, int); static void ie_obattend(struct ie_softc *, int); static void ie_obrun(struct ie_softc *); int ie_obio_match(device_t, cfdata_t, void *); void ie_obio_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(ie_obio, sizeof(struct ie_softc), ie_obio_match, ie_obio_attach, NULL, NULL); /* Supported media */ static int media[] = { IFM_ETHER | IFM_10_2, }; #define NMEDIA (sizeof(media) / sizeof(media[0])) /* * OBIO ie support routines */ static void ie_obreset(struct ie_softc *sc, int what) { volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; ieo->obctrl = 0; delay(100); /* XXX could be shorter? */ ieo->obctrl = IEOB_NORSET; } static void ie_obattend(struct ie_softc *sc, int why) { volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; ieo->obctrl |= IEOB_ATTEN; /* flag! */ ieo->obctrl &= ~IEOB_ATTEN; /* down. */ } static void ie_obrun(struct ie_softc *sc) { volatile struct ieob *ieo = (struct ieob *) sc->sc_reg; ieo->obctrl |= (IEOB_ONAIR|IEOB_IENAB|IEOB_NORSET); } void ie_obio_memcopyin(struct ie_softc *, void *, int, size_t); void ie_obio_memcopyout(struct ie_softc *, const void *, int, size_t); /* * Copy board memory to kernel. */ void ie_obio_memcopyin(struct ie_softc *sc, void *p, int offset, size_t size) { void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ wcopy(addr, p, size); } /* * Copy from kernel space to naord memory. */ void ie_obio_memcopyout(struct ie_softc *sc, const void *p, int offset, size_t size) { void *addr = (void *)((u_long)sc->bh + offset);/*XXX - not MI!*/ wcopy(p, addr, size); } /* read a 16-bit value at BH offset */ uint16_t ie_obio_read16(struct ie_softc *, int); /* write a 16-bit value at BH offset */ void ie_obio_write16(struct ie_softc *, int, uint16_t); void ie_obio_write24(struct ie_softc *, int, int); uint16_t ie_obio_read16(struct ie_softc *sc, int offset) { uint16_t v = bus_space_read_2(sc->bt, sc->bh, offset); return (((v&0xff)<<8) | ((v>>8)&0xff)); } void ie_obio_write16(struct ie_softc *sc, int offset, uint16_t v) { v = (((v&0xff)<<8) | ((v>>8)&0xff)); bus_space_write_2(sc->bt, sc->bh, offset, v); } void ie_obio_write24(struct ie_softc *sc, int offset, int addr) { u_char *f = (u_char *)&addr; uint16_t v0, v1; u_char *t; t = (u_char *)&v0; t[0] = f[3]; t[1] = f[2]; bus_space_write_2(sc->bt, sc->bh, offset, v0); t = (u_char *)&v1; t[0] = f[1]; t[1] = 0; bus_space_write_2(sc->bt, sc->bh, offset+2, v1); } int ie_obio_match(device_t parent, cfdata_t cf, void *aux) { union obio_attach_args *uoba = aux; struct obio4_attach_args *oba; if (uoba->uoba_isobio4 == 0) return (0); oba = &uoba->uoba_oba4; return (bus_space_probe(oba->oba_bustag, oba->oba_paddr, 1, /* probe size */ 0, /* offset */ 0, /* flags */ NULL, NULL)); } void ie_obio_attach(device_t parent, device_t self, void *aux) { union obio_attach_args *uoba = aux; struct obio4_attach_args *oba = &uoba->uoba_oba4; struct ie_softc *sc = device_private(self); bus_dma_tag_t dmatag = oba->oba_dmatag; bus_space_handle_t bh; bus_dma_segment_t seg; int rseg; int error; paddr_t pa; bus_size_t memsize; u_long iebase; uint8_t myaddr[ETHER_ADDR_LEN]; sc->sc_dev = self; sc->bt = oba->oba_bustag; sc->hwreset = ie_obreset; sc->chan_attn = ie_obattend; sc->hwinit = ie_obrun; sc->memcopyout = ie_obio_memcopyout; sc->memcopyin = ie_obio_memcopyin; sc->ie_bus_barrier = NULL; sc->ie_bus_read16 = ie_obio_read16; sc->ie_bus_write16 = ie_obio_write16; sc->ie_bus_write24 = ie_obio_write24; sc->sc_msize = memsize = 65536; /* XXX */ if (bus_space_map(oba->oba_bustag, oba->oba_paddr, sizeof(struct ieob), BUS_SPACE_MAP_LINEAR, &bh) != 0) { printf("%s: cannot map registers\n", device_xname(self)); return; } sc->sc_reg = (void *)bh; /* * Allocate control & buffer memory. */ if ((error = bus_dmamap_create(dmatag, memsize, 1, memsize, 0, BUS_DMA_NOWAIT|BUS_DMA_24BIT, &sc->sc_dmamap)) != 0) { printf("%s: DMA map create error %d\n", device_xname(self), error); return; } if ((error = bus_dmamem_alloc(dmatag, memsize, 64*1024, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT | BUS_DMA_24BIT)) != 0) { printf("%s: DMA memory allocation error %d\n", device_xname(self), error); return; } /* Map DMA buffer in CPU addressable space */ if ((error = bus_dmamem_map(dmatag, &seg, rseg, memsize, (void **)&sc->sc_maddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { printf("%s: DMA buffer map error %d\n", device_xname(self), error); bus_dmamem_free(dmatag, &seg, rseg); return; } /* Load the segment */ if ((error = bus_dmamap_load(dmatag, sc->sc_dmamap, sc->sc_maddr, memsize, NULL, BUS_DMA_NOWAIT)) != 0) { printf("%s: DMA buffer map load error %d\n", device_xname(self), error); bus_dmamem_unmap(dmatag, sc->sc_maddr, memsize); bus_dmamem_free(dmatag, &seg, rseg); return; } wzero(sc->sc_maddr, memsize); sc->bh = (bus_space_handle_t)(sc->sc_maddr); /* * The i82586's 24-bit address space maps to the last 16MB of * KVA space (). In addition, the SCP must appear * at IE_SCP_ADDR within the 24-bit address space, * i.e. at KVA IEOB_ADBASE+IE_SCP_ADDR, at the very top of * kernel space. We double-map this last page to the first * page (starting at `maddr') of the memory we allocate to the chip. * (a side-effect of this double-map is that the ISCP and SCB * structures also get aliased there, but we ignore this). The * first page at `maddr' is only used for ISCP, SCB and the aliased * SCP; the actual buffers start at maddr+PAGE_SIZE. * * In a picture: |---//--- ISCP-SCB-----scp-|--//- buffers -//-|... |iscp-scb-----SCP-| | | | | | | | | |<---PAGE_SIZE-->| | |<--PAGE_SIZE-+-->| | |<------------ memsize ------------>| | ^ | | | | | | \@maddr (last page dbl mapped) | | \@IEOB_ADBASE @IEOB_ADBASE+IE_SCP_ADDR-+ * */ /* Double map the SCP */ if (pmap_extract(pmap_kernel(), (vaddr_t)sc->sc_maddr, &pa) == false) panic("ie pmap_extract"); pmap_enter(pmap_kernel(), trunc_page(IEOB_ADBASE+IE_SCP_ADDR), pa | PMAP_NC /*| PMAP_IOC*/, VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); pmap_update(pmap_kernel()); /* Map iscp at location 0 (relative to `maddr') */ sc->iscp = 0; /* scb follows iscp */ sc->scb = IE_ISCP_SZ; /* scp is at the fixed location IE_SCP_ADDR (modulo the page size) */ sc->scp = IE_SCP_ADDR & PGOFSET; /* Calculate the 24-bit base of i82586 operations */ iebase = (u_long)sc->sc_dmamap->dm_segs[0].ds_addr - (u_long)IEOB_ADBASE; ie_obio_write16(sc, IE_ISCP_SCB(sc->iscp), sc->scb); ie_obio_write24(sc, IE_ISCP_BASE(sc->iscp), iebase); ie_obio_write24(sc, IE_SCP_ISCP(sc->scp), iebase + sc->iscp); /* * Rest of first page is unused (wasted!); the other pages * are used for buffers. */ sc->buf_area = PAGE_SIZE; sc->buf_area_sz = memsize - PAGE_SIZE; if (i82586_proberam(sc) == 0) { printf(": memory probe failed\n"); return; } prom_getether(0, myaddr); i82586_attach(sc, "onboard", myaddr, media, NMEDIA, media[0]); /* Establish interrupt channel */ (void)bus_intr_establish(oba->oba_bustag, oba->oba_pri, IPL_NET, i82586_intr, sc); }