/* $NetBSD: if_ie_vme.c,v 1.6 1999/03/23 12:01:45 pk Exp $ */ /*- * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Charles D. Cranor. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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. */ /* * 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. */ /* * programming notes: * * the ie chip operates in a 24 bit address space. * * most ie interfaces appear to be divided into two parts: * - generic 586 stuff * - board specific * * generic: * the generic stuff of the ie chip is all done with data structures * that live in the chip's memory address space. the chip expects * its main data structure (the sys conf ptr -- SCP) to be at a fixed * address in its 24 bit space: 0xfffff4 * * the SCP points to another structure called the ISCP. * the ISCP points to another structure called the SCB. * the SCB has a status field, a linked list of "commands", and * a linked list of "receive buffers". these are data structures that * live in memory, not registers. * * board: * to get the chip to do anything, you first put a command in the * command data structure list. then you have to signal "attention" * to the chip to get it to look at the command. how you * signal attention depends on what board you have... on PC's * there is an i/o port number to do this, on sun's there is a * register bit you toggle. * * to get data from the chip you program it to interrupt... * * * sun issues: * * there are 3 kinds of sun "ie" interfaces: * 1 - a VME/multibus card * 2 - an on-board interface (sun3's, sun-4/100's, and sun-4/200's) * 3 - another VME board called the 3E * * the VME boards lives in vme16 space. only 16 and 8 bit accesses * are allowed, so functions that copy data must be aware of this. * * the chip is an intel chip. this means that the byte order * on all the "short"s in the chip's data structures is wrong. * so, constants described in the intel docs are swapped for the sun. * that means that any buffer pointers you give the chip must be * swapped to intel format. yuck. * * VME/multibus interface: * for the multibus interface the board ignores the top 4 bits * of the chip address. the multibus interface has its own * MMU like page map (without protections or valid bits, etc). * there are 256 pages of physical memory on the board (each page * is 1024 bytes). There are 1024 slots in the page map. so, * a 1024 byte page takes up 10 bits of address for the offset, * and if there are 1024 slots in the page that is another 10 bits * of the address. That makes a 20 bit address, and as stated * earlier the board ignores the top 4 bits, so that accounts * for all 24 bits of address. * * Note that the last entry of the page map maps the top of the * 24 bit address space and that the SCP is supposed to be at * 0xfffff4 (taking into account allignment). so, * for multibus, that entry in the page map has to be used for the SCP. * * The page map effects BOTH how the ie chip sees the * memory, and how the host sees it. * * The page map is part of the "register" area of the board * * The page map to control where ram appears in the address space. * We choose to have RAM start at 0 in the 24 bit address space. * * to get the phyiscal address of the board's RAM you must take the * top 12 bits of the physical address of the register address and * or in the 4 bits from the status word as bits 17-20 (remember that * the board ignores the chip's top 4 address lines). For example: * if the register is @ 0xffe88000, then the top 12 bits are 0xffe00000. * to get the 4 bits from the the status word just do status & IEVME_HADDR. * suppose the value is "4". Then just shift it left 16 bits to get * it into bits 17-20 (e.g. 0x40000). Then or it to get the * address of RAM (in our example: 0xffe40000). see the attach routine! * * * on-board interface: * * on the onboard ie interface the 24 bit address space is hardwired * to be 0xff000000 -> 0xffffffff of KVA. this means that sc_iobase * will be 0xff000000. sc_maddr will be where ever we allocate RAM * in KVA. note that since the SCP is at a fixed address it means * that we have to allocate a fixed KVA for the SCP. * * * * VME3E interface: * * * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * VME/multibus definitions */ #define IEVME_PAGESIZE 1024 /* bytes */ #define IEVME_PAGSHIFT 10 /* bits */ #define IEVME_NPAGES 256 /* number of pages on chip */ #define IEVME_MAPSZ 1024 /* number of entries in the map */ /* * PTE for the page map */ #define IEVME_SBORDR 0x8000 /* sun byte order */ #define IEVME_IBORDR 0x0000 /* intel byte ordr */ #define IEVME_P2MEM 0x2000 /* memory is on P2 */ #define IEVME_OBMEM 0x0000 /* memory is on board */ #define IEVME_PGMASK 0x0fff /* gives the physical page frame number */ struct ievme { u_int16_t pgmap[IEVME_MAPSZ]; u_int16_t xxx[32]; /* prom */ u_int16_t status; /* see below for bits */ u_int16_t xxx2; /* filler */ u_int16_t pectrl; /* parity control (see below) */ u_int16_t peaddr; /* low 16 bits of address */ }; /* * status bits */ #define IEVME_RESET 0x8000 /* reset board */ #define IEVME_ONAIR 0x4000 /* go out of loopback 'on-air' */ #define IEVME_ATTEN 0x2000 /* attention */ #define IEVME_IENAB 0x1000 /* interrupt enable */ #define IEVME_PEINT 0x0800 /* parity error interrupt enable */ #define IEVME_PERR 0x0200 /* parity error flag */ #define IEVME_INT 0x0100 /* interrupt flag */ #define IEVME_P2EN 0x0020 /* enable p2 bus */ #define IEVME_256K 0x0010 /* 256kb rams */ #define IEVME_HADDR 0x000f /* mask for bits 17-20 of address */ /* * parity control */ #define IEVME_PARACK 0x0100 /* parity error ack */ #define IEVME_PARSRC 0x0080 /* parity error source */ #define IEVME_PAREND 0x0040 /* which end of the data got the error */ #define IEVME_PARADR 0x000f /* mask to get bits 17-20 of parity address */ /* Supported media */ static int media[] = { IFM_ETHER | IFM_10_2, }; #define NMEDIA (sizeof(media) / sizeof(media[0])) /* * the 3E board not supported (yet?) */ static void ie_vmereset __P((struct ie_softc *, int)); static void ie_vmeattend __P((struct ie_softc *)); static void ie_vmerun __P((struct ie_softc *)); static int ie_vmeintr __P((struct ie_softc *, int)); int ie_vme_match __P((struct device *, struct cfdata *, void *)); void ie_vme_attach __P((struct device *, struct device *, void *)); struct cfattach ie_vme_ca = { sizeof(struct ie_softc), ie_vme_match, ie_vme_attach }; /* * MULTIBUS/VME support routines */ void ie_vmereset(sc, what) struct ie_softc *sc; int what; { volatile struct ievme *iev = (struct ievme *) sc->sc_reg; iev->status = IEVME_RESET; delay(100); /* XXX could be shorter? */ iev->status = 0; } void ie_vmeattend(sc) struct ie_softc *sc; { volatile struct ievme *iev = (struct ievme *) sc->sc_reg; iev->status |= IEVME_ATTEN; /* flag! */ iev->status &= ~IEVME_ATTEN; /* down. */ } void ie_vmerun(sc) struct ie_softc *sc; { volatile struct ievme *iev = (struct ievme *) sc->sc_reg; iev->status |= (IEVME_ONAIR | IEVME_IENAB | IEVME_PEINT); } int ie_vmeintr(sc, where) struct ie_softc *sc; int where; { volatile struct ievme *iev = (volatile struct ievme *)sc->sc_reg; if (where != INTR_ENTER) return (0); /* * check for parity error */ if (iev->status & IEVME_PERR) { printf("%s: parity error (ctrl 0x%x @ 0x%02x%04x)\n", sc->sc_dev.dv_xname, iev->pectrl, iev->pectrl & IEVME_HADDR, iev->peaddr); iev->pectrl = iev->pectrl | IEVME_PARACK; } return (0); } void ie_memcopyin __P((struct ie_softc *, void *, int, size_t)); void ie_memcopyout __P((struct ie_softc *, const void *, int, size_t)); /* * Copy board memory to kernel. */ void ie_memcopyin(sc, p, offset, size) 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_memcopyout(sc, p, offset, size) 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 */ u_int16_t ie_vme_read16 __P((struct ie_softc *, int offset)); /* write a 16-bit value at BH offset */ void ie_vme_write16 __P((struct ie_softc *, int offset, u_int16_t value)); void ie_vme_write24 __P((struct ie_softc *, int offset, int addr)); u_int16_t ie_vme_read16(sc, offset) struct ie_softc *sc; int offset; { u_int16_t v; bus_space_barrier(sc->bt, sc->bh, offset, 2, BUS_SPACE_BARRIER_READ); v = bus_space_read_2(sc->bt, sc->bh, offset); return (((v&0xff)<<8) | ((v>>8)&0xff)); } void ie_vme_write16(sc, offset, v) struct ie_softc *sc; int offset; u_int16_t v; { int v0 = ((((v)&0xff)<<8) | (((v)>>8)&0xff)); bus_space_write_2(sc->bt, sc->bh, offset, v0); bus_space_barrier(sc->bt, sc->bh, offset, 2, BUS_SPACE_BARRIER_WRITE); } void ie_vme_write24(sc, offset, addr) struct ie_softc *sc; int offset; int addr; { u_char *f = (u_char *)&addr; u_int16_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); bus_space_barrier(sc->bt, sc->bh, offset, 4, BUS_SPACE_BARRIER_WRITE); } int ie_vme_match(parent, cf, aux) struct device *parent; struct cfdata *cf; void *aux; { struct vme_attach_args *va = aux; vme_chipset_tag_t ct = va->vma_chipset_tag; bus_space_tag_t bt = va->vma_bustag; int mod; mod = VMEMOD_A24 | VMEMOD_S | VMEMOD_D; return (vme_bus_probe(ct, bt, va->vma_reg[0], 0, 2, mod, 0, 0)); } void ie_vme_attach(parent, self, aux) struct device *parent; struct device *self; void *aux; { u_int8_t myaddr[ETHER_ADDR_LEN]; extern void myetheraddr(u_char *); /* should be elsewhere */ struct ie_softc *sc = (void *) self; struct vme_attach_args *va = aux; vme_chipset_tag_t ct = va->vma_chipset_tag; bus_space_tag_t bt = va->vma_bustag; bus_space_handle_t bh; vme_intr_handle_t ih; volatile struct ievme *iev; u_long rampaddr; int lcv; vme_size_t sz; int mod; /* * *note*: we don't detect the difference between a VME3E and * a multibus/vme card. if you want to use a 3E you'll have * to fix this. */ mod = VMEMOD_A24 | VMEMOD_S | VMEMOD_D; sc->bt = bt; sc->hwreset = ie_vmereset; sc->hwinit = ie_vmerun; sc->chan_attn = ie_vmeattend; sc->intrhook = ie_vmeintr; sc->memcopyout = ie_memcopyout; sc->memcopyin = ie_memcopyin; sc->ie_bus_read16 = ie_vme_read16; sc->ie_bus_write16 = ie_vme_write16; sc->ie_bus_write24 = ie_vme_write24; sc->sc_msize = 4*65536; /* XXX */ sz = sizeof(struct ievme); if (vme_bus_map(ct, va->vma_reg[0], sz, mod, bt, &bh) != 0) panic("if_ie: vme_map"); sc->sc_reg = (caddr_t)bh; iev = (volatile struct ievme *) sc->sc_reg; /* top 12 bits */ rampaddr = (u_long)va->vma_reg[0] & 0xfff00000; /* 4 more */ rampaddr = rampaddr | ((iev->status & IEVME_HADDR) << 16); sz = sc->sc_msize; if (vme_bus_map(ct, rampaddr, sz, mod, bt, &bh) != 0) panic("if_ie: vme_map"); sc->bh = bh; iev->pectrl = iev->pectrl | IEVME_PARACK; /* clear to start */ /* * Set up mappings, direct map except for last page * which is mapped at zero and at high address (for scp) */ for (lcv = 0; lcv < IEVME_MAPSZ - 1; lcv++) iev->pgmap[lcv] = IEVME_SBORDR | IEVME_OBMEM | lcv; iev->pgmap[IEVME_MAPSZ - 1] = IEVME_SBORDR | IEVME_OBMEM | 0; /* Clear all ram */ bus_space_set_region_2(sc->bt, sc->bh, 0, 0, sc->sc_msize/2); /* * We use the first page to set up SCP, ICSP and SCB data * structures. The remaining pages become the buffer area * (managed in i82586.c). * SCP is in double-mapped page, so the 586 can see it at * the mandatory magic address (IE_SCP_ADDR). */ sc->scp = (IE_SCP_ADDR & (IEVME_PAGESIZE - 1)); /* iscp at location zero */ sc->iscp = 0; /* scb follows iscp */ sc->scb = IE_ISCP_SZ; ie_vme_write16(sc, IE_ISCP_SCB((long)sc->iscp), sc->scb); ie_vme_write16(sc, IE_ISCP_BASE((u_long)sc->iscp), 0); ie_vme_write24(sc, IE_SCP_ISCP((u_long)sc->scp), 0); if (i82586_proberam(sc) == 0) { printf(": memory probe failed\n"); return; } /* * Rest of first page is unused; rest of ram for buffers. */ sc->buf_area = IEVME_PAGESIZE; sc->buf_area_sz = sc->sc_msize - IEVME_PAGESIZE; sc->do_xmitnopchain = 0; myetheraddr(myaddr); i82586_attach(sc, "multibus/vme", myaddr, media, NMEDIA, media[0]); vme_intr_map(ct, va->vma_vec, va->vma_pri, &ih); vme_intr_establish(ct, ih, i82586_intr, sc); vme_bus_establish(ct, &sc->sc_dev); }