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Current File : //sys/isa/pnp.c |
/* * 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. * * from: pnp.c,v 1.11 1999/05/06 22:11:19 peter Exp */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/isa/pnp.c 220126 2011-03-29 12:38:13Z jhb $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/module.h> #include <sys/bus.h> #include <sys/endian.h> #include <sys/malloc.h> #include <isa/isavar.h> #include <isa/pnpreg.h> #include <isa/pnpvar.h> #include <machine/bus.h> typedef struct _pnp_id { uint32_t vendor_id; uint32_t serial; u_char checksum; } pnp_id; struct pnp_set_config_arg { int csn; /* Card number to configure */ int ldn; /* Logical device on card */ }; struct pnp_quirk { uint32_t vendor_id; /* Vendor of the card */ uint32_t logical_id; /* ID of the device with quirk */ int type; #define PNP_QUIRK_WRITE_REG 1 /* Need to write a pnp register */ #define PNP_QUIRK_EXTRA_IO 2 /* Has extra io ports */ int arg1; int arg2; }; struct pnp_quirk pnp_quirks[] = { /* * The Gravis UltraSound needs register 0xf2 to be set to 0xff * to enable power. * XXX need to know the logical device id. */ { 0x0100561e /* GRV0001 */, 0, PNP_QUIRK_WRITE_REG, 0xf2, 0xff }, /* * An emu8000 does not give us other than the first * port. */ { 0x26008c0e /* SB16 */, 0x21008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0x42008c0e /* SB32(CTL0042) */, 0x21008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0x44008c0e /* SB32(CTL0044) */, 0x21008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0x49008c0e /* SB32(CTL0049) */, 0x21008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0xf1008c0e /* SB32(CTL00f1) */, 0x21008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0xc1008c0e /* SB64(CTL00c1) */, 0x22008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0xc5008c0e /* SB64(CTL00c5) */, 0x22008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0xe4008c0e /* SB64(CTL00e4) */, 0x22008c0e, PNP_QUIRK_EXTRA_IO, 0x400, 0x800 }, { 0 } }; #ifdef PC98 /* Some NEC PnP cards have 9 bytes serial code. */ static pnp_id necids[] = { {0x4180a3b8, 0xffffffff, 0x00}, /* PC-9801CB-B04 (NEC8041) */ {0x5181a3b8, 0xffffffff, 0x46}, /* PC-9821CB2-B04(NEC8151) */ {0x5182a3b8, 0xffffffff, 0xb8}, /* PC-9801-XX (NEC8251) */ {0x9181a3b8, 0xffffffff, 0x00}, /* PC-9801-120 (NEC8191) */ {0, 0, 0} }; #endif /* The READ_DATA port that we are using currently */ static int pnp_rd_port; static void pnp_send_initiation_key(void); static int pnp_get_serial(pnp_id *p); static int pnp_isolation_protocol(device_t parent); char * pnp_eisaformat(uint32_t id) { uint8_t *data; static char idbuf[8]; const char hextoascii[] = "0123456789abcdef"; id = htole32(id); data = (uint8_t *)&id; idbuf[0] = '@' + ((data[0] & 0x7c) >> 2); idbuf[1] = '@' + (((data[0] & 0x3) << 3) + ((data[1] & 0xe0) >> 5)); idbuf[2] = '@' + (data[1] & 0x1f); idbuf[3] = hextoascii[(data[2] >> 4)]; idbuf[4] = hextoascii[(data[2] & 0xf)]; idbuf[5] = hextoascii[(data[3] >> 4)]; idbuf[6] = hextoascii[(data[3] & 0xf)]; idbuf[7] = 0; return(idbuf); } static void pnp_write(int d, u_char r) { outb (_PNP_ADDRESS, d); outb (_PNP_WRITE_DATA, r); } /* * Send Initiation LFSR as described in "Plug and Play ISA Specification", * Intel May 94. */ static void pnp_send_initiation_key() { 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. */ static 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, PNP_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); } /* * Fill's the buffer with resource info from the device. * Returns the number of characters read. */ static int pnp_get_resource_info(u_char *buffer, int len) { int i, j, count; u_char temp; count = 0; for (i = 0; i < len; i++) { outb(_PNP_ADDRESS, PNP_STATUS); for (j = 0; j < 100; j++) { if ((inb((pnp_rd_port << 2) | 0x3)) & 0x1) break; DELAY(10); } if (j == 100) { printf("PnP device failed to report resource data\n"); return (count); } outb(_PNP_ADDRESS, PNP_RESOURCE_DATA); temp = inb((pnp_rd_port << 2) | 0x3); if (buffer != NULL) buffer[i] = temp; count++; } return (count); } /* * This function is called after the bus has assigned resource * locations for a logical device. */ static void pnp_set_config(void *arg, struct isa_config *config, int enable) { int csn = ((struct pnp_set_config_arg *) arg)->csn; int ldn = ((struct pnp_set_config_arg *) arg)->ldn; int i; /* * First put all cards into Sleep state with the initiation * key, then put our card into Config state. */ pnp_send_initiation_key(); pnp_write(PNP_WAKE, csn); /* * Select our logical device so that we can program it. */ pnp_write(PNP_SET_LDN, ldn); /* * Constrain the number of resources we will try to program */ if (config->ic_nmem > ISA_PNP_NMEM) { printf("too many ISA memory ranges (%d > %d)\n", config->ic_nmem, ISA_PNP_NMEM); config->ic_nmem = ISA_PNP_NMEM; } if (config->ic_nport > ISA_PNP_NPORT) { printf("too many ISA I/O ranges (%d > %d)\n", config->ic_nport, ISA_PNP_NPORT); config->ic_nport = ISA_PNP_NPORT; } if (config->ic_nirq > ISA_PNP_NIRQ) { printf("too many ISA IRQs (%d > %d)\n", config->ic_nirq, ISA_PNP_NIRQ); config->ic_nirq = ISA_PNP_NIRQ; } if (config->ic_ndrq > ISA_PNP_NDRQ) { printf("too many ISA DRQs (%d > %d)\n", config->ic_ndrq, ISA_PNP_NDRQ); config->ic_ndrq = ISA_PNP_NDRQ; } /* * Now program the resources. */ for (i = 0; i < config->ic_nmem; i++) { uint32_t start; uint32_t size; /* XXX: should handle memory control register, 32 bit memory */ if (config->ic_mem[i].ir_size == 0) { pnp_write(PNP_MEM_BASE_HIGH(i), 0); pnp_write(PNP_MEM_BASE_LOW(i), 0); pnp_write(PNP_MEM_RANGE_HIGH(i), 0); pnp_write(PNP_MEM_RANGE_LOW(i), 0); } else { start = config->ic_mem[i].ir_start; size = config->ic_mem[i].ir_size; if (start & 0xff) panic("pnp_set_config: bogus memory assignment"); pnp_write(PNP_MEM_BASE_HIGH(i), (start >> 16) & 0xff); pnp_write(PNP_MEM_BASE_LOW(i), (start >> 8) & 0xff); pnp_write(PNP_MEM_RANGE_HIGH(i), (size >> 16) & 0xff); pnp_write(PNP_MEM_RANGE_LOW(i), (size >> 8) & 0xff); } } for (; i < ISA_PNP_NMEM; i++) { pnp_write(PNP_MEM_BASE_HIGH(i), 0); pnp_write(PNP_MEM_BASE_LOW(i), 0); pnp_write(PNP_MEM_RANGE_HIGH(i), 0); pnp_write(PNP_MEM_RANGE_LOW(i), 0); } for (i = 0; i < config->ic_nport; i++) { uint32_t start; if (config->ic_port[i].ir_size == 0) { pnp_write(PNP_IO_BASE_HIGH(i), 0); pnp_write(PNP_IO_BASE_LOW(i), 0); } else { start = config->ic_port[i].ir_start; pnp_write(PNP_IO_BASE_HIGH(i), (start >> 8) & 0xff); pnp_write(PNP_IO_BASE_LOW(i), (start >> 0) & 0xff); } } for (; i < ISA_PNP_NPORT; i++) { pnp_write(PNP_IO_BASE_HIGH(i), 0); pnp_write(PNP_IO_BASE_LOW(i), 0); } for (i = 0; i < config->ic_nirq; i++) { int irq; /* XXX: interrupt type */ if (config->ic_irqmask[i] == 0) { pnp_write(PNP_IRQ_LEVEL(i), 0); pnp_write(PNP_IRQ_TYPE(i), 2); } else { irq = ffs(config->ic_irqmask[i]) - 1; pnp_write(PNP_IRQ_LEVEL(i), irq); pnp_write(PNP_IRQ_TYPE(i), 2); /* XXX */ } } for (; i < ISA_PNP_NIRQ; i++) { /* * IRQ 0 is not a valid interrupt selection and * represents no interrupt selection. */ pnp_write(PNP_IRQ_LEVEL(i), 0); pnp_write(PNP_IRQ_TYPE(i), 2); } for (i = 0; i < config->ic_ndrq; i++) { int drq; if (config->ic_drqmask[i] == 0) { pnp_write(PNP_DMA_CHANNEL(i), 4); } else { drq = ffs(config->ic_drqmask[i]) - 1; pnp_write(PNP_DMA_CHANNEL(i), drq); } } for (; i < ISA_PNP_NDRQ; i++) { /* * DMA channel 4, the cascade channel is used to * indicate no DMA channel is active. */ pnp_write(PNP_DMA_CHANNEL(i), 4); } pnp_write(PNP_ACTIVATE, enable ? 1 : 0); /* * Wake everyone up again, we are finished. */ pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); } /* * Process quirks for a logical device.. The card must be in Config state. */ void pnp_check_quirks(uint32_t vendor_id, uint32_t logical_id, int ldn, struct isa_config *config) { struct pnp_quirk *qp; for (qp = &pnp_quirks[0]; qp->vendor_id; qp++) { if (qp->vendor_id == vendor_id && (qp->logical_id == 0 || qp->logical_id == logical_id)) { switch (qp->type) { case PNP_QUIRK_WRITE_REG: pnp_write(PNP_SET_LDN, ldn); pnp_write(qp->arg1, qp->arg2); break; case PNP_QUIRK_EXTRA_IO: if (config == NULL) break; if (qp->arg1 != 0) { config->ic_nport++; config->ic_port[config->ic_nport - 1] = config->ic_port[0]; config->ic_port[config->ic_nport - 1].ir_start += qp->arg1; config->ic_port[config->ic_nport - 1].ir_end += qp->arg1; } if (qp->arg2 != 0) { config->ic_nport++; config->ic_port[config->ic_nport - 1] = config->ic_port[0]; config->ic_port[config->ic_nport - 1].ir_start += qp->arg2; config->ic_port[config->ic_nport - 1].ir_end += qp->arg2; } break; } } } } /* * Scan Resource Data for Logical Devices. * * This function exits as soon as it gets an error reading *ANY* * Resource Data or it reaches the end of Resource Data. In the first * case the return value will be TRUE, FALSE otherwise. */ static int pnp_create_devices(device_t parent, pnp_id *p, int csn, u_char *resources, int len) { u_char tag, *resp, *resinfo, *startres = 0; int large_len, scanning = len, retval = FALSE; uint32_t logical_id; device_t dev = 0; int ldn = 0; struct pnp_set_config_arg *csnldn; char buf[100]; char *desc = 0; resp = resources; while (scanning > 0) { tag = *resp++; scanning--; if (PNP_RES_TYPE(tag) != 0) { /* Large resource */ if (scanning < 2) { scanning = 0; continue; } large_len = resp[0] + (resp[1] << 8); resp += 2; if (scanning < large_len) { scanning = 0; continue; } resinfo = resp; resp += large_len; scanning -= large_len; if (PNP_LRES_NUM(tag) == PNP_TAG_ID_ANSI) { if (dev) { /* * This is an optional device * indentifier string. Skipt it * for now. */ continue; } /* else mandately card identifier string */ if (large_len > sizeof(buf) - 1) large_len = sizeof(buf) - 1; bcopy(resinfo, buf, large_len); /* * Trim trailing spaces. */ while (buf[large_len-1] == ' ') large_len--; buf[large_len] = '\0'; desc = buf; continue; } continue; } /* Small resource */ if (scanning < PNP_SRES_LEN(tag)) { scanning = 0; continue; } resinfo = resp; resp += PNP_SRES_LEN(tag); scanning -= PNP_SRES_LEN(tag); switch (PNP_SRES_NUM(tag)) { case PNP_TAG_LOGICAL_DEVICE: /* * Parse the resources for the previous * logical device (if any). */ if (startres) { pnp_parse_resources(dev, startres, resinfo - startres - 1, ldn); dev = 0; startres = 0; } /* * A new logical device. Scan for end of * resources. */ bcopy(resinfo, &logical_id, 4); pnp_check_quirks(p->vendor_id, logical_id, ldn, NULL); dev = BUS_ADD_CHILD(parent, ISA_ORDER_PNP, NULL, -1); if (desc) device_set_desc_copy(dev, desc); else device_set_desc_copy(dev, pnp_eisaformat(logical_id)); isa_set_vendorid(dev, p->vendor_id); isa_set_serial(dev, p->serial); isa_set_logicalid(dev, logical_id); isa_set_configattr(dev, ISACFGATTR_CANDISABLE | ISACFGATTR_DYNAMIC); csnldn = malloc(sizeof *csnldn, M_DEVBUF, M_NOWAIT); if (!csnldn) { device_printf(parent, "out of memory\n"); scanning = 0; break; } csnldn->csn = csn; csnldn->ldn = ldn; ISA_SET_CONFIG_CALLBACK(parent, dev, pnp_set_config, csnldn); isa_set_pnp_csn(dev, csn); isa_set_pnp_ldn(dev, ldn); ldn++; startres = resp; break; case PNP_TAG_END: if (!startres) { device_printf(parent, "malformed resources\n"); scanning = 0; break; } pnp_parse_resources(dev, startres, resinfo - startres - 1, ldn); dev = 0; startres = 0; scanning = 0; break; default: /* Skip this resource */ break; } } return (retval); } /* * Read 'amount' bytes of resources from the card, allocating memory * as needed. If a buffer is already available, it should be passed in * '*resourcesp' and its length in '*spacep'. The number of resource * bytes already in the buffer should be passed in '*lenp'. The memory * allocated will be returned in '*resourcesp' with its size and the * number of bytes of resources in '*spacep' and '*lenp' respectively. * * XXX: Multiple problems here, we forget to free() stuff in one * XXX: error return, and in another case we free (*resourcesp) but * XXX: don't tell the caller. */ static int pnp_read_bytes(int amount, u_char **resourcesp, int *spacep, int *lenp) { u_char *resources = *resourcesp; u_char *newres; int space = *spacep; int len = *lenp; if (space == 0) { space = 1024; resources = malloc(space, M_TEMP, M_NOWAIT); if (!resources) return (ENOMEM); } if (len + amount > space) { int extra = 1024; while (len + amount > space + extra) extra += 1024; newres = malloc(space + extra, M_TEMP, M_NOWAIT); if (!newres) { /* XXX: free resources */ return (ENOMEM); } bcopy(resources, newres, len); free(resources, M_TEMP); resources = newres; space += extra; } if (pnp_get_resource_info(resources + len, amount) != amount) return (EINVAL); len += amount; *resourcesp = resources; *spacep = space; *lenp = len; return (0); } /* * Read all resources from the card, allocating memory as needed. If a * buffer is already available, it should be passed in '*resourcesp' * and its length in '*spacep'. The memory allocated will be returned * in '*resourcesp' with its size and the number of bytes of resources * in '*spacep' and '*lenp' respectively. */ static int pnp_read_resources(u_char **resourcesp, int *spacep, int *lenp) { u_char *resources = *resourcesp; int space = *spacep; int len = 0; int error, done; u_char tag; error = 0; done = 0; while (!done) { error = pnp_read_bytes(1, &resources, &space, &len); if (error) goto out; tag = resources[len-1]; if (PNP_RES_TYPE(tag) == 0) { /* * Small resource, read contents. */ error = pnp_read_bytes(PNP_SRES_LEN(tag), &resources, &space, &len); if (error) goto out; if (PNP_SRES_NUM(tag) == PNP_TAG_END) done = 1; } else { /* * Large resource, read length and contents. */ error = pnp_read_bytes(2, &resources, &space, &len); if (error) goto out; error = pnp_read_bytes(resources[len-2] + (resources[len-1] << 8), &resources, &space, &len); if (error) goto out; } } out: *resourcesp = resources; *spacep = space; *lenp = len; return (error); } /* * 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. */ static int pnp_isolation_protocol(device_t parent) { int csn; pnp_id id; int found = 0, len; u_char *resources = 0; int space = 0; int error; #ifdef PC98 int n, necpnp; u_char buffer[10]; #endif /* * Put all cards into the Sleep state so that we can clear * their CSNs. */ pnp_send_initiation_key(); /* * Clear the CSN for all cards. */ pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_RESET_CSN); /* * Move all cards to the Isolation state. */ pnp_write(PNP_WAKE, 0); /* * Tell them where the read point is going to be this time. */ pnp_write(PNP_SET_RD_DATA, pnp_rd_port); for (csn = 1; csn < PNP_MAX_CARDS; csn++) { /* * Start the serial isolation protocol. */ outb(_PNP_ADDRESS, PNP_SERIAL_ISOLATION); DELAY(1000); /* Delay 1 msec */ if (pnp_get_serial(&id)) { /* * We have read the id from a card * successfully. The card which won the * isolation protocol will be in Isolation * mode and all others will be in Sleep. * Program the CSN of the isolated card * (taking it to Config state) and read its * resources, creating devices as we find * logical devices on the card. */ pnp_write(PNP_SET_CSN, csn); #ifdef PC98 if (bootverbose) printf("PnP Vendor ID = %x\n", id.vendor_id); /* Check for NEC PnP (9 bytes serial). */ for (n = necpnp = 0; necids[n].vendor_id; n++) { if (id.vendor_id == necids[n].vendor_id) { necpnp = 1; break; } } if (necpnp) { if (bootverbose) printf("An NEC-PnP card (%s).\n", pnp_eisaformat(id.vendor_id)); /* Read dummy 9 bytes serial area. */ pnp_get_resource_info(buffer, 9); } else { if (bootverbose) printf("A Normal-ISA-PnP card (%s).\n", pnp_eisaformat(id.vendor_id)); } #endif if (bootverbose) printf("Reading PnP configuration for %s.\n", pnp_eisaformat(id.vendor_id)); error = pnp_read_resources(&resources, &space, &len); if (error) break; pnp_create_devices(parent, &id, csn, resources, len); found++; } else break; /* * Put this card back to the Sleep state and * simultaneously move all cards which don't have a * CSN yet to Isolation state. */ pnp_write(PNP_WAKE, 0); } /* * Unless we have chosen the wrong read port, all cards will * be in Sleep state. Put them back into WaitForKey for * now. Their resources will be programmed later. */ pnp_write(PNP_CONFIG_CONTROL, PNP_CONFIG_CONTROL_WAIT_FOR_KEY); /* * Cleanup. */ if (resources) free(resources, M_TEMP); return (found); } /* * pnp_identify() * * autoconfiguration of pnp devices. This routine just runs the * isolation protocol over several ports, until one is successful. * * may be called more than once ? * */ static void pnp_identify(driver_t *driver, device_t parent) { int num_pnp_devs; /* Try various READ_DATA ports from 0x203-0x3ff */ for (pnp_rd_port = 0x80; (pnp_rd_port < 0xff); pnp_rd_port += 0x10) { if (bootverbose) printf("pnp_identify: Trying Read_Port at %x\n", (pnp_rd_port << 2) | 0x3); num_pnp_devs = pnp_isolation_protocol(parent); if (num_pnp_devs) break; } if (bootverbose) printf("PNP Identify complete\n"); } static device_method_t pnp_methods[] = { /* Device interface */ DEVMETHOD(device_identify, pnp_identify), { 0, 0 } }; static driver_t pnp_driver = { "pnp", pnp_methods, 1, /* no softc */ }; static devclass_t pnp_devclass; DRIVER_MODULE(pnp, isa, pnp_driver, pnp_devclass, 0, 0);