/* $OpenBSD: nubus.c,v 1.28 2003/05/09 00:59:26 art Exp $ */ /* $NetBSD: nubus.c,v 1.35 1997/04/22 20:20:32 scottr Exp $ */ /* * Copyright (c) 1995, 1996 Allen Briggs. 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 Allen Briggs. * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nubus.h" #ifdef DEBUG static int nubus_debug = 0x01; #define NDB_PROBE 0x1 #define NDB_FOLLOW 0x2 #define NDB_ARITH 0x4 #endif static int nubus_print(void *, const char *); static int nubus_match(struct device *, void *, void *); static void nubus_attach(struct device *, struct device *, void *); int nubus_video_resource(int); static int probe_slot(int slot, nubus_slot *fmt); static u_long IncPtr(nubus_slot *fmt, u_long base, long amt); static u_long nubus_calc_CRC(nubus_slot *fmt); static u_char GetByte(nubus_slot *fmt, u_long ptr); #ifdef notyet /* unused */ static u_short GetWord(nubus_slot *fmt, u_long ptr); #endif static u_long GetLong(nubus_slot *fmt, u_long ptr); static int nubus_peek(vm_offset_t, int); struct cfattach nubus_ca = { sizeof(struct nubus_softc), nubus_match, nubus_attach }; struct cfdriver nubus_cd = { NULL, "nubus", DV_DULL, }; static int nubus_match(parent, vcf, aux) struct device *parent; void *vcf; void *aux; { static int nubus_matched = 0; /* Allow only one instance. */ if (nubus_matched) return (0); nubus_matched = 1; return (1); } static void nubus_attach(parent, self, aux) struct device *parent, *self; void *aux; { struct nubus_attach_args na_args; nubus_slot fmtblock; nubus_dir dir; nubus_dirent dirent; nubus_type slottype; u_long entry; int i, rsrcid; printf("\n"); for (i = NUBUS_MIN_SLOT; i <= NUBUS_MAX_SLOT; i++) { if (probe_slot(i, &fmtblock) <= 0) continue; rsrcid = 0x80; nubus_get_main_dir(&fmtblock, &dir); /* * Get the resource for the first function on the card. * This is assumed to be at resource ID 0x80. If we can * not find this entry (as we can not on some video cards), * check to see if we can get a different ID from the list * of video resources given to us by the booter. If that * doesn't work either, take the first resource following * the board resource. */ if (nubus_find_rsrc(&fmtblock, &dir, rsrcid, &dirent) <= 0) { if ((rsrcid = nubus_video_resource(i)) == -1) { /* * Since nubus_find_rsrc failed, the directory * is back at its base. */ entry = dir.curr_ent; /* * All nubus cards should have a board * resource, but be sure that's what it * is before we skip it. */ rsrcid = GetByte(&fmtblock, entry); if (rsrcid == 0x1) entry = IncPtr(&fmtblock, dir.curr_ent, 4); rsrcid = GetByte(&fmtblock, entry); #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("\tUsing rsrc 0x%x.\n", rsrcid); #endif if (rsrcid == 0xff) continue; /* end of chain */ } /* * Try to find the resource passed by the booter * or the one we just tracked down. */ if (nubus_find_rsrc(&fmtblock, &dir, rsrcid, &dirent) <= 0) { continue; } } nubus_get_dir_from_rsrc(&fmtblock, &dirent, &dir); if (nubus_find_rsrc(&fmtblock, &dir, NUBUS_RSRC_TYPE, &dirent) <= 0) continue; if (nubus_get_ind_data(&fmtblock, &dirent, (caddr_t) &slottype, sizeof(nubus_type)) <= 0) continue; /* * If this is a display card, try to pull out the correct * display mode as passed by the booter. */ if (slottype.category == NUBUS_CATEGORY_DISPLAY) { int r; if ((r = nubus_video_resource(i)) != -1) { nubus_get_main_dir(&fmtblock, &dir); if (nubus_find_rsrc(&fmtblock, &dir, r, &dirent) <= 0) continue; nubus_get_dir_from_rsrc(&fmtblock, &dirent, &dir); if (nubus_find_rsrc(&fmtblock, &dir, NUBUS_RSRC_TYPE, &dirent) <= 0) continue; if (nubus_get_ind_data(&fmtblock, &dirent, (caddr_t) &slottype, sizeof(nubus_type)) <= 0) continue; rsrcid = r; } } na_args.slot = i; na_args.rsrcid = rsrcid; na_args.category = slottype.category; na_args.type = slottype.type; na_args.drsw = slottype.drsw; na_args.drhw = slottype.drhw; na_args.fmt = &fmtblock; config_found(self, &na_args, nubus_print); } /* * enable nubus interrupts here. */ enable_nubus_intr(); } static int nubus_print(aux, name) void *aux; const char *name; { struct nubus_attach_args *na = (struct nubus_attach_args *) aux; if (name) { printf("%s: slot %x: %s", name, na->fmt->slot, nubus_get_card_name(na->fmt)); printf(" (Vendor: %s,", nubus_get_vendor(na->fmt, NUBUS_RSRC_VEND_ID)); printf(" Part: %s", nubus_get_vendor(na->fmt, NUBUS_RSRC_VEND_PART)); #ifdef DIAGNOSTIC printf(" Type: %04x %04x %04x %04x", na->category, na->type, na->drsw, na->drhw); #endif } return (UNCONF); } int nubus_video_resource(slot) int slot; { extern u_int16_t mac68k_vrsrc_vec[]; int i; for (i = 0 ; i < 6 ; i++) if ((mac68k_vrsrc_vec[i] & 0xff) == slot) return ((mac68k_vrsrc_vec[i] >> 8) & 0xff); return (-1); } /* * Probe a given nubus slot. If a card is there and we can get the * format block from it's clutching decl. ROMs, fill the format block * and return non-zero. If we can't find a card there with a valid * decl. ROM, return 0. * * First, we check to see if we can access the memory at the tail * end of the slot. If so, then we check for a bytelanes byte. We * could probably just return a failure status if we bus error on * the first try, but there really is little reason not to go ahead * and check the other three locations in case there's a weird card * out there. * * Checking for a card involves locating the "bytelanes" byte which * tells us how to interpret the declaration ROM's data. The format * block is at the top of the card's standard memory space and the * bytelanes byte is at the end of that block. * * After some inspection of the bytelanes byte, it appears that it * takes the form 0xXY where Y is a bitmask of the bytelanes in use * and X is a bitmask of the lanes to ignore. Hence, (X ^ Y) == 0 * and (less obviously), Y will have the upper N bits clear if it is * found N bytes from the last possible location. Both that and * the exclusive-or check are made. * * If a valid */ static u_char nbits[]={0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4}; static int probe_slot(slot, fmt) int slot; nubus_slot *fmt; { caddr_t rom_probe; vm_offset_t hdr; #ifdef DEBUG vm_offset_t pa; #endif u_int data; int hdr_size, i; fmt->bytelanes = 0; fmt->slot = (u_long)slot; rom_probe = (caddr_t) (NUBUS_SLOT2PA(fmt->slot) + NBMEMSIZE); #ifdef DEBUG if (nubus_debug & NDB_PROBE) { pmap_extract(pmap_kernel(), (vm_offset_t) rom_probe - 1, &pa); printf("probing slot %d, first probe at %p (PA %lx).\n", slot, rom_probe - 1, pa); } #endif for (i = 4; i && (fmt->bytelanes == 0); i--) { rom_probe--; data = nubus_peek((vm_offset_t) rom_probe, 1); if (data == (u_int) -1) continue; if (data == 0) continue; if ( ((((data & 0xf0) >> 4) ^ (data & 0x0f)) == 0x0f) && ((data & 0x0f) < (1 << i)) ) { fmt->bytelanes = data; fmt->step = nbits[(data & 0x0f)]; } } #ifdef DEBUG if (nubus_debug & NDB_PROBE) if (fmt->bytelanes == 0) printf("bytelanes not found for slot 0x%x.\n", slot); #endif if (fmt->bytelanes == 0) return 0; #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("bytelanes of 0x%x found for slot 0x%x.\n", fmt->bytelanes, slot); #endif hdr_size = 20; /* * Go ahead and attempt to load format header. * First, we need to find the first byte beyond memory that * would be valid. This is necessary for NUBUS_ROM_offset() * to work. */ hdr = (vm_offset_t) nubus_mapin(NUBUS_SLOT2PA(fmt->slot), NBMEMSIZE); if (hdr == NULL) { printf("Failed to map %d bytes for NuBUS slot %d probe. ", NBMEMSIZE, fmt->slot); printf("Physical slot address %x\n", (unsigned int) NUBUS_SLOT2PA(fmt->slot)); } fmt->virtual_base = hdr; hdr += NBMEMSIZE; i = 0x10 | (fmt->bytelanes & 0x0f); while ((i & 1) == 0) { hdr++; i >>= 1; } fmt->top = hdr; hdr = IncPtr(fmt, hdr, -hdr_size); #ifdef DEBUG if (nubus_debug & NDB_PROBE) printf("fmt->top is 0x%lx, that minus 0x%x puts us at 0x%lx.\n", fmt->top, hdr_size, hdr); #if 0 for (i=1 ; i < 8 ; i++) { printf("0x%x - 0x%x = 0x%x, + 0x%x = 0x%x.\n", hdr, i, IncPtr(fmt, hdr, -i), i, IncPtr(fmt, hdr, i)); } #endif #endif fmt->directory_offset = 0xff000000 | GetLong(fmt, hdr); hdr = IncPtr(fmt, hdr, 4); fmt->length = GetLong(fmt, hdr); hdr = IncPtr(fmt, hdr, 4); fmt->crc = GetLong(fmt, hdr); hdr = IncPtr(fmt, hdr, 4); fmt->revision_level = GetByte(fmt, hdr); hdr = IncPtr(fmt, hdr, 1); fmt->format = GetByte(fmt, hdr); hdr = IncPtr(fmt, hdr, 1); fmt->test_pattern = GetLong(fmt, hdr); #ifdef DEBUG if (nubus_debug & NDB_PROBE) { printf("Directory offset 0x%x\t", fmt->directory_offset); printf("Length 0x%x\t", fmt->length); printf("CRC 0x%x\n", fmt->crc); printf("Revision level 0x%x\t", fmt->revision_level); printf("Format 0x%x\t", fmt->format); printf("Test Pattern 0x%x\n", fmt->test_pattern); } #endif if ((fmt->directory_offset & 0x00ff0000) == 0) { printf("Invalid looking directory offset (0x%x)!\n", fmt->directory_offset); return 0; } if (fmt->test_pattern != NUBUS_ROM_TEST_PATTERN) { printf("Nubus--test pattern invalid:\n"); printf(" slot 0x%x, bytelanes 0x%x?\n", fmt->slot, fmt->bytelanes); printf(" read test 0x%x, compare with 0x%x.\n", fmt->test_pattern, NUBUS_ROM_TEST_PATTERN); return 0; } /* Perform CRC */ if (fmt->crc != nubus_calc_CRC(fmt)) { printf("Nubus--crc check failed, slot 0x%x.\n", fmt->slot); return 0; } return 1; } /* * Compute byte offset on card, taking into account bytelanes. * Base must be on a valid bytelane for this function to work. * Return the new address. * * XXX -- There has GOT to be a better way to do this. */ static u_long IncPtr(fmt, base, amt) nubus_slot *fmt; u_long base; long amt; { u_char b, t; if (!amt) return base; if (amt < 0) { amt = -amt; b = fmt->bytelanes; t = (b << 4); b <<= (3 - (base & 0x3)); while (amt) { b <<= 1; if (b == t) b = fmt->bytelanes; if (b & 0x08) amt--; base--; } return base; } t = (fmt->bytelanes & 0xf) | 0x10; b = t >> (base & 0x3); while (amt) { b >>= 1; if (b == 1) b = t; if (b & 1) amt--; base++; } return base; } static u_long nubus_calc_CRC(fmt) nubus_slot *fmt; { #if 0 u_long base, ptr, crc_loc, sum; int i; base = fmt->top; crc_loc = NUBUS_ROM_offset(fmt, base, -12); ptr = NUBUS_ROM_offset(fmt, base, -fmt->length); sum = 0; while (ptr < base) roll #1, sum if (ptr == crc_loc) { roll #3, sum ptr = IncPtr(fmt, ptr, 3); } else { sum += GetByte(fmt, ptr); } ptr = IncPtr(fmt, ptr, 1); } return sum; #endif return fmt->crc; } static u_char GetByte(fmt, ptr) nubus_slot *fmt; u_long ptr; { return *(caddr_t)ptr; } #ifdef notyet /* Nothing uses this, yet */ static u_short GetWord(fmt, ptr) nubus_slot *fmt; u_long ptr; { u_short s; s = (GetByte(fmt, ptr) << 8); ptr = IncPtr(fmt, ptr, 1); s |= GetByte(fmt, ptr); return s; } #endif static u_long GetLong(fmt, ptr) nubus_slot *fmt; u_long ptr; { register u_long l; register int i; l = 0; for ( i = 0; i < 4; i++) { l = (l << 8) | GetByte(fmt, ptr); ptr = IncPtr(fmt, ptr, 1); } return l; } void nubus_get_main_dir(slot, dir_return) nubus_slot *slot; nubus_dir *dir_return; { #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_main_dir(0x%x, 0x%x)\n", (u_int) slot, (u_int) dir_return); #endif dir_return->dirbase = IncPtr(slot, slot->top, slot->directory_offset - 20); dir_return->curr_ent = dir_return->dirbase; } int nubus_find_rsrc(slot, dir, rsrcid, dirent_return) nubus_slot *slot; nubus_dir *dir; u_int8_t rsrcid; nubus_dirent *dirent_return; { u_long entry; u_char byte; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_find_rsrc(0x%x, 0x%x, 0x%x, 0x%x)\n", (u_int) slot, (u_int) dir, (u_int) rsrcid, (u_int) dirent_return); #endif if (slot->test_pattern != NUBUS_ROM_TEST_PATTERN) return -1; entry = dir->curr_ent; do { byte = GetByte(slot, entry); #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("\tFound rsrc 0x%x.\n", byte); #endif if (byte == rsrcid) { dirent_return->myloc = entry; dirent_return->rsrc_id = rsrcid; entry = GetLong(slot, entry); dirent_return->offset = (entry & 0x00ffffff); return 1; } if (byte == 0xff) { entry = dir->dirbase; } else { entry = IncPtr(slot, entry, 4); } } while (entry != (u_long) dir->curr_ent); return 0; } void nubus_get_dir_from_rsrc(slot, dirent, dir_return) nubus_slot *slot; nubus_dirent *dirent; nubus_dir *dir_return; { u_long loc; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_dir_from_rsrc(0x%x, 0x%x, 0x%x).\n", (u_int) slot, (u_int) dirent, (u_int) dir_return); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } dir_return->dirbase = IncPtr(slot, dirent->myloc, loc); dir_return->curr_ent = dir_return->dirbase; } int nubus_get_ind_data(slot, dirent, data_return, nbytes) nubus_slot *slot; nubus_dirent *dirent; caddr_t data_return; int nbytes; { u_long loc; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_ind_data(0x%x, 0x%x, 0x%x, %d).\n", (u_int) slot, (u_int) dirent, (u_int) data_return, nbytes); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } loc = IncPtr(slot, dirent->myloc, loc); while (nbytes--) { *data_return++ = GetByte(slot, loc); loc = IncPtr(slot, loc, 1); } return 1; } int nubus_get_c_string(slot, dirent, data_return, max_bytes) nubus_slot *slot; nubus_dirent *dirent; caddr_t data_return; int max_bytes; { u_long loc; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_c_string(0x%x, 0x%x, 0x%x, %d).\n", (u_int) slot, (u_int) dirent, (u_int) data_return, max_bytes); #endif if ((loc = dirent->offset) & 0x800000) { loc |= 0xff000000; } loc = IncPtr(slot, dirent->myloc, loc); *data_return = '\0'; while (max_bytes--) { if ((*data_return++ = GetByte(slot, loc)) == 0) return 1; loc = IncPtr(slot, loc, 1); } return 0; } static char *huh = "???"; char * nubus_get_vendor(slot, rsrc) nubus_slot *slot; int rsrc; { static char str_ret[64]; nubus_dir dir; nubus_dirent ent; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_vendor(0x%x, 0x%x).\n", (u_int) slot, rsrc); #endif nubus_get_main_dir(slot, &dir); if (nubus_find_rsrc(slot, &dir, 1, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(slot, &ent, &dir); if (nubus_find_rsrc(slot, &dir, NUBUS_RSRC_VENDORINFO, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(slot, &ent, &dir); if (nubus_find_rsrc(slot, &dir, rsrc, &ent) <= 0) return huh; nubus_get_c_string(slot, &ent, str_ret, 64); return str_ret; } char * nubus_get_card_name(slot) nubus_slot *slot; { static char name_ret[64]; nubus_dir dir; nubus_dirent ent; #ifdef DEBUG if (nubus_debug & NDB_FOLLOW) printf("nubus_get_card_name(0x%lx).\n", (u_long) slot); #endif nubus_get_main_dir(slot, &dir); if (nubus_find_rsrc(slot, &dir, 1, &ent) <= 0) return huh; nubus_get_dir_from_rsrc(slot, &ent, &dir); if (nubus_find_rsrc(slot, &dir, NUBUS_RSRC_NAME, &ent) <= 0) return huh; nubus_get_c_string(slot, &ent, name_ret, 64); return name_ret; } /* * bus_*() functions adapted from sun3 generic "bus" support * by Allen Briggs. */ vm_offset_t tmp_vpages[1]; /* * Read addr with size len (1,2,4) into val. * If this generates a bus error, return -1 * * Create a temporary mapping, * Try the access using peek_* * Clean up temp. mapping */ static int nubus_peek(paddr, sz) vm_offset_t paddr; int sz; { int off, pte, rv; vm_offset_t pgva; caddr_t va; off = paddr & PGOFSET; paddr -= off; pte = (paddr & PG_FRAME) | (PG_V | PG_W | PG_CI); pgva = tmp_vpages[0]; va = (caddr_t)pgva + off; mac68k_set_pte(pgva, pte); TBIS(pgva); /* * OK, try the access using one of the assembly routines * that will set pcb_onfault and catch any bus errors. */ rv = -1; switch (sz) { case 1: if (!badbaddr(va)) rv = *((u_char *) va); break; case 2: if (!badwaddr(va)) rv = *((u_int16_t *) va); break; case 4: if (!badladdr(va)) rv = *((u_int32_t *) va); break; default: printf("bus_peek: invalid size=%d\n", sz); rv = -1; } mac68k_set_pte(pgva, PG_NV); TBIS(pgva); return rv; } char * nubus_mapin(paddr, sz) int paddr, sz; { int off, pa, pmt=0; vm_offset_t va, retval; off = paddr & PGOFSET; pa = paddr - off; sz += off; sz = m68k_round_page(sz); /* Get some kernel virtual address space. */ va = uvm_km_valloc_wait(kernel_map, sz); if (va == 0) panic("bus_mapin"); retval = va + off; /* Map it to the specified bus. */ do { pmap_enter(pmap_kernel(), va, pa | pmt, VM_PROT_READ|VM_PROT_WRITE, 0); va += NBPG; pa += NBPG; } while ((sz -= NBPG) > 0); pmap_update(pmap_kernel()); return ((char *)retval); }