/* * Copyright (c) 1996, Sujal M. Patel * 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 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 AUTHOR 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. * * $Id: pnp.c,v 1.2 1997/09/18 08:04:11 jmg Exp $ */ #include #include #include /* for DATA_SET */ #include #include #include #include #include #include #include #include #include int num_pnp_cards = 0; pnp_id pnp_devices[MAX_PNP_CARDS]; struct pnp_dlist_node *pnp_device_list; static struct pnp_dlist_node **pnp_device_list_last_ptr; /* * these entries are initialized using the autoconfig menu * The struct is invalid (and must be initialized) if the first * CSN is zero. The init code fills invalid entries with CSN 255 * which is not a supported value. */ struct pnp_cinfo pnp_ldn_overrides[MAX_PNP_LDN] = { { 0 } }; /* * the following is a flag which tells if the data is valid. */ static int doing_pnp_probe = 0 ; static int current_csn ; static int current_pnp_id ; static int current_pnp_serial ; /* * the following block is an example on what is needed for * a PnP device driver. */ static char* nullpnp_probe(u_long csn, u_long vendor_id); static void nullpnp_attach(u_long csn, u_long vendor_id, char *name, struct isa_device *dev); static u_long nullpnp_count = 0 ; static struct pnp_device nullpnp_device = { "goodpnp", nullpnp_probe, nullpnp_attach, &nullpnp_count, NULL /* imask */ }; DATA_SET (pnpdevice_set, nullpnp_device); static char* nullpnp_probe(u_long tag, u_long type) { if (bootverbose) printf("Called nullpnp_probe with tag 0x%08lx, type 0x%08lx\n", tag, type); return NULL; } static void nullpnp_attach(u_long csn, u_long vend_id, char *name, struct isa_device *dev) { printf("nullpnp_attach: csn %ld, vend_id 0x%08lx name %s unit %d\n", csn, vend_id, name, dev->id_unit); return; } /* The READ_DATA port that we are using currently */ static int pnp_rd_port; void pnp_send_Initiation_LFSR (void); int pnp_get_serial (pnp_id *p); void config_pnp_device (pnp_id *p, int csn); int pnp_isolation_protocol (void); void pnp_write(int d, u_char r); u_char pnp_read(int d); void pnp_write(int d, u_char r) { outb (_PNP_ADDRESS, d); outb (_PNP_WRITE_DATA, r); } u_char pnp_read(int d) { outb (_PNP_ADDRESS, d); return (inb(3 | (pnp_rd_port <<2))); } /* * Send Initiation LFSR as described in "Plug and Play ISA Specification", * Intel May 94. */ void pnp_send_Initiation_LFSR() { int cur, i; /* Reset the LSFR */ outb(_PNP_ADDRESS, 0); outb(_PNP_ADDRESS, 0); /* yes, we do need it twice! */ cur = 0x6a; outb(_PNP_ADDRESS, cur); for (i = 1; i < 32; i++) { cur = (cur >> 1) | (((cur ^ (cur >> 1)) << 7) & 0xff); outb(_PNP_ADDRESS, cur); } } /* * Get the device's serial number. Returns 1 if the serial is valid. */ int pnp_get_serial(pnp_id *p) { int i, bit, valid = 0, sum = 0x6a; u_char *data = (u_char *)p; bzero(data, sizeof(char) * 9); outb(_PNP_ADDRESS, SERIAL_ISOLATION); for (i = 0; i < 72; i++) { bit = inb((pnp_rd_port << 2) | 0x3) == 0x55; DELAY(250); /* Delay 250 usec */ /* Can't Short Circuit the next evaluation, so 'and' is last */ bit = (inb((pnp_rd_port << 2) | 0x3) == 0xaa) && bit; DELAY(250); /* Delay 250 usec */ valid = valid || bit; if (i < 64) sum = (sum >> 1) | (((sum ^ (sum >> 1) ^ bit) << 7) & 0xff); data[i / 8] = (data[i / 8] >> 1) | (bit ? 0x80 : 0); } valid = valid && (data[8] == sum); return valid; } /* * read_pnp_parms loads pnp parameters from the currently selected * device into the struct pnp_cinfo parameter passed. * The second argument specifies the Logical Device to use. */ int read_pnp_parms(struct pnp_cinfo *d, int ldn) { int i ; if (doing_pnp_probe == 0 || d == NULL) return 0 ; /* fail */ bzero(d, sizeof(struct pnp_cinfo)); d->vendor_id = current_pnp_id ; d->serial = current_pnp_serial ; d->csn = current_csn ; d->ldn = ldn ; /* XXX this should be different ... */ pnp_write (SET_LDN, ldn ); i = pnp_read(SET_LDN) ; if (i != ldn) { printf("Warning: LDN %d does not exist\n", ldn); } for (i = 0; i < 8; i++) { d->port[i] = pnp_read(IO_CONFIG_BASE + i * 2) << 8 ; d->port[i] |= pnp_read(IO_CONFIG_BASE + i * 2 + 1); if (i < 4) { d->mem[i].base = pnp_read (MEM_CONFIG + i*8) << 16 ; d->mem[i].base |= pnp_read (MEM_CONFIG + i*8 + 1) << 8 ; d->mem[i].control = pnp_read (MEM_CONFIG + i*8 + 2) ; d->mem[i].range = pnp_read (MEM_CONFIG + i*8 + 3) << 16 ; d->mem[i].range |= pnp_read (MEM_CONFIG + i*8 + 4) << 8 ; } if (i < 2) { d->irq[i] = pnp_read(IRQ_CONFIG + i * 2); d->irq_type[i] = pnp_read(IRQ_CONFIG + 1 + i * 2); d->drq[i] = pnp_read(DRQ_CONFIG + i); } } d->enable = pnp_read(ACTIVATE); for (i = 0 ; i < MAX_PNP_LDN; i++) { if (pnp_ldn_overrides[i].csn == d->csn && pnp_ldn_overrides[i].ldn == ldn) { d->flags = pnp_ldn_overrides[i].flags ; d->override = pnp_ldn_overrides[i].override ; break ; } } if (bootverbose) printf("port 0x%04x 0x%04x 0x%04x 0x%04x irq %d:%d drq %d:%d en %d\n", d->port[0], d->port[1], d->port[2], d->port[3], d->irq[0], d->irq[1], d->drq[0], d->drq[1], d->enable); return 1 ; /* success */ } /* * write_pnp_parms initializes a logical device with the parms * in d, and then activates the board if the last parameter is 1. */ int write_pnp_parms(struct pnp_cinfo *d, int ldn) { int i, empty = -1 ; /* * some safety checks first. */ if (doing_pnp_probe == 0 || d==NULL || d->vendor_id != current_pnp_id) return 0 ; /* fail */ pnp_write (SET_LDN, ldn ); i = pnp_read(SET_LDN) ; if (i != ldn) { printf("Warning: LDN %d does not exist\n", ldn); } for (i = 0; i < 8; i++) { pnp_write(IO_CONFIG_BASE + i * 2, d->port[i] >> 8 ); pnp_write(IO_CONFIG_BASE + i * 2 + 1, d->port[i] & 0xff ); } for (i = 0; i < 4; i++) { pnp_write(MEM_CONFIG + i*8, (d->mem[i].base >> 16) & 0xff ); pnp_write(MEM_CONFIG + i*8+1, (d->mem[i].base >> 8) & 0xff ); pnp_write(MEM_CONFIG + i*8+2, d->mem[i].control & 0xff ); pnp_write(MEM_CONFIG + i*8+3, (d->mem[i].range >> 16) & 0xff ); pnp_write(MEM_CONFIG + i*8+4, (d->mem[i].range >> 8) & 0xff ); } for (i = 0; i < 2; i++) { pnp_write(IRQ_CONFIG + i*2 , d->irq[i] ); pnp_write(IRQ_CONFIG + i*2 + 1, d->irq_type[i] ); pnp_write(DRQ_CONFIG + i, d->drq[i] ); } /* * store parameters read into the current kernel * so manual editing next time is easier */ for (i = 0 ; i < MAX_PNP_LDN; i++) { if (pnp_ldn_overrides[i].csn == d->csn && pnp_ldn_overrides[i].ldn == ldn) { d->flags = pnp_ldn_overrides[i].flags ; pnp_ldn_overrides[i] = *d ; break ; } else if (pnp_ldn_overrides[i].csn < 1 || pnp_ldn_overrides[i].csn == 255) empty = i ; } if (i== MAX_PNP_LDN && empty != -1) pnp_ldn_overrides[empty] = *d; /* * Here should really perform the range check, and * return a failure if not successful. */ pnp_write (IO_RANGE_CHECK, 0); DELAY(1000); /* XXX is it really necessary ? */ pnp_write (ACTIVATE, d->enable ? 1 : 0); DELAY(1000); /* XXX is it really necessary ? */ return 1 ; } /* * To finalize a card's initialization, and before accessing its * registers, we need to bring the card in WaitForKey. To this purpose, * we need to issue a WaitForKey command, which brings _all_ cards * in that state. So, before configuring the next board, we must also * sent the Init-Key to bring cards to the SLEEP state again. * * In fact, one could hope that cards respond to normal I/O accesses * even in the SLEEP state, which could be done by issuing a WAKE[0]. * This seems to work on the CS4236, but not on the CS4232 on my Zappa * motherboard . */ int enable_pnp_card() { /* the next wake should bring the card in WaitForKey ? */ pnp_write (WAKE, 0); pnp_write(CONFIG_CONTROL, 0x02); /* All cards in WaitForKey */ DELAY(1000); /* XXX is it really necessary ? */ return 1 ; /* success */ } /* * Configure PnP devices. pnp_id is made of: * 4 bytes: board id (which can be printed as an ascii string); * 4 bytes: board serial number (often 0 or -1 ?) */ void config_pnp_device(pnp_id *p, int csn) { static struct pnp_dlist_node *nod = NULL; int i; u_char *data = (u_char *)p; /* these are for autoconfigure a-la pci */ struct pnp_device *dvp, **dvpp; char *name ; printf("CSN %d Vendor ID: %c%c%c%02x%02x [0x%08lx] Serial 0x%08lx\n", csn, ((data[0] & 0x7c) >> 2) + '@', (((data[0] & 0x03) << 3) | ((data[1] & 0xe0) >> 5)) + '@', (data[1] & 0x1f) + '@', data[2], data[3], p->vendor_id, p->serial); doing_pnp_probe = 1 ; current_csn = csn ; current_pnp_id = p->vendor_id ; current_pnp_serial = p->serial ; /* * use kernel table to override possible devices */ for (i = 0 ; i < MAX_PNP_LDN; i++) { if (pnp_ldn_overrides[i].csn == csn && pnp_ldn_overrides[i].override == 1) { struct pnp_cinfo d; if (bootverbose) printf("PnP: override config for CSN %d LDN %d " "vend_id 0x%08x\n", csn, pnp_ldn_overrides[i].ldn, current_pnp_id); /* next assignement is done otherwise read fails */ d.vendor_id = current_pnp_id ; read_pnp_parms(&d, pnp_ldn_overrides[i].ldn); if (pnp_ldn_overrides[i].enable == 0) { /* just disable ... */ d.enable = 0; write_pnp_parms(&d, pnp_ldn_overrides[i].ldn); } else { /* set all parameters */ /* next assignement is done otherwise write fails */ pnp_ldn_overrides[i].vendor_id = current_pnp_id ; write_pnp_parms(&pnp_ldn_overrides[i], pnp_ldn_overrides[i].ldn); } } } /* lookup device in ioconfiguration */ dvpp = (struct pnp_device **)pnpdevice_set.ls_items; while ((dvp = *dvpp++)) { if (dvp->pd_probe) { if ((name = (*dvp->pd_probe)(csn, p->vendor_id))) break; } } if (dvp && name && dvp->pd_count) { /* found a matching device */ int unit ; /* pnpcb->pnpcb_seen |= ( 1ul << csn ) ; */ /* get and increment the unit */ unit = (*dvp->pd_count)++; /* * now call the attach routine. The board has not been * configured yet, so better not access isa registers in * the attach routine until enable_pnp_card() has been done. */ if (nod == NULL) nod = malloc(sizeof(struct pnp_dlist_node), M_DEVBUF, M_NOWAIT); if (nod == NULL) panic("malloc failed for PnP resource use"); bzero(nod, sizeof(*nod)); nod->pnp = dvp; nod->dev.id_unit = unit ; if (dvp->pd_attach) (*dvp->pd_attach) (csn, p->vendor_id, name, &(nod->dev)); printf("%s%d (%s <%s> sn 0x%08lx)", nod->dev.id_driver && nod->dev.id_driver->name ? nod->dev.id_driver->name : "unknown", unit, dvp->pd_name, name, p->serial); if (nod->dev.id_alive) { if (nod->dev.id_irq) { /* the board uses interrupts. Register it. */ if (dvp->imask) INTRMASK( *(dvp->imask), nod->dev.id_irq ); register_intr(ffs(nod->dev.id_irq) - 1, nod->dev.id_id, nod->dev.id_ri_flags, nod->dev.id_intr, dvp->imask, nod->dev.id_unit); INTREN(nod->dev.id_irq); } if (nod->dev.id_alive != 0) { if (nod->dev.id_iobase == -1) printf(" at ?"); else { printf(" at 0x%x", nod->dev.id_iobase); if ((nod->dev.id_iobase + nod->dev.id_alive -1) != nod->dev.id_iobase) { printf("-0x%x", nod->dev.id_iobase + nod->dev.id_alive - 1); } } } if (nod->dev.id_irq) printf(" irq %d", ffs(nod->dev.id_irq) - 1); if (nod->dev.id_drq != -1) printf(" drq %d", nod->dev.id_drq); if (nod->dev.id_maddr) printf(" maddr 0x%lx", kvtop(nod->dev.id_maddr)); if (nod->dev.id_msize) printf(" msize %d", nod->dev.id_msize); if (nod->dev.id_flags) printf(" flags 0x%x", nod->dev.id_flags); if (nod->dev.id_iobase && !(nod->dev.id_iobase & 0xf300)) { printf(" on motherboard"); printf(" id %d", nod->dev.id_id); } else if (nod->dev.id_iobase >= 0x1000 && !(nod->dev.id_iobase & 0x300)) { printf (" on eisa slot %d", nod->dev.id_iobase >> 12); } else { printf (" on isa"); } printf("\n"); if (pnp_device_list_last_ptr == NULL) pnp_device_list = nod; else *pnp_device_list_last_ptr = nod; pnp_device_list_last_ptr = &(nod->next); nod = NULL; } else printf(" failed to attach\n"); } doing_pnp_probe = 0 ; } /* * Run the isolation protocol. Use pnp_rd_port as the READ_DATA port * value (caller should try multiple READ_DATA locations before giving * up). Upon exiting, all cards are aware that they should use * pnp_rd_port as the READ_DATA port. * * In the first pass, a csn is assigned to each board and pnp_id's * are saved to an array, pnp_devices. In the second pass, each * card is woken up and the device configuration is called. */ int pnp_isolation_protocol() { int csn; pnp_send_Initiation_LFSR(); pnp_write(CONFIG_CONTROL, 0x04); /* Reset CSN for All Cards */ for (csn = 1; (csn < MAX_PNP_CARDS); csn++) { /* Wake up cards without a CSN */ pnp_write(WAKE, 0); pnp_write(SET_RD_DATA, pnp_rd_port); outb(_PNP_ADDRESS, SERIAL_ISOLATION); DELAY(1000); /* Delay 1 msec */ if (pnp_get_serial( &(pnp_devices[csn-1]) ) ) { pnp_write(SET_CSN, csn); /* pnp_write(CONFIG_CONTROL, 2); */ } else break; } num_pnp_cards = csn - 1; for (csn = 1; csn <= num_pnp_cards ; csn++) { /* * make sure cards are in SLEEP state */ pnp_send_Initiation_LFSR(); pnp_write(WAKE, csn); config_pnp_device( &(pnp_devices[csn-1]), csn); /* * Put all cards in WaitForKey, just in case the previous * attach routine forgot it. */ pnp_write(CONFIG_CONTROL, 0x02); DELAY(1000); /* XXX is it really necessary ? */ } return num_pnp_cards ; } /* * pnp_configure() * * autoconfiguration of pnp devices. This routine just runs the * isolation protocol over several ports, until one is successful. * * may be called more than once ? * */ void pnp_configure() { int num_pnp_devs; if (pnp_ldn_overrides[0].csn == 0) { if (bootverbose) printf("Initializing PnP override table\n"); bzero (pnp_ldn_overrides, sizeof(pnp_ldn_overrides)); pnp_ldn_overrides[0].csn = 255 ; } printf("Probing for PnP devices:\n"); /* Try various READ_DATA ports from 0x203-0x3ff */ for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { if (bootverbose) printf("Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); num_pnp_devs = pnp_isolation_protocol(); if (num_pnp_devs) break; } if (!num_pnp_devs) { if (bootverbose) printf("No Plug-n-Play devices were found\n"); return; } }