Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/ep/if_ep_isa.c
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1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Herb Peyerl. 18 * 4. The name of Herb Peyerl may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/12.0/sys/dev/ep/if_ep_isa.c 327381 2017-12-30 11:42:49Z kib $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/socket.h> 40 #include <sys/module.h> 41 #include <sys/bus.h> 42 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 47 #include <net/if.h> 48 #include <net/if_arp.h> 49 #include <net/if_media.h> 50 51 #include <isa/isavar.h> 52 53 #include <dev/ep/if_epreg.h> 54 #include <dev/ep/if_epvar.h> 55 56 #ifdef __i386__ 57 #include <dev/ep/elink.h> 58 #endif 59 60 #ifdef __i386__ 61 static uint16_t get_eeprom_data(int, int); 62 static void ep_isa_identify(driver_t *, device_t); 63 #endif 64 65 static int ep_isa_probe(device_t); 66 static int ep_isa_attach(device_t); 67 static int ep_eeprom_cksum(struct ep_softc *); 68 69 struct isa_ident { 70 uint32_t id; 71 char *name; 72 }; 73 const char *ep_isa_match_id(uint32_t, struct isa_ident *); 74 75 #define ISA_ID_3C509_XXX 0x0506d509 76 #define ISA_ID_3C509_TP 0x506d5090 77 #define ISA_ID_3C509_BNC 0x506d5091 78 #define ISA_ID_3C509_COMBO 0x506d5094 79 #define ISA_ID_3C509_TPO 0x506d5095 80 #define ISA_ID_3C509_TPC 0x506d5098 81 82 #ifdef __i386__ 83 static struct isa_ident ep_isa_devs[] = { 84 {ISA_ID_3C509_TP, "3Com 3C509-TP EtherLink III"}, 85 {ISA_ID_3C509_BNC, "3Com 3C509-BNC EtherLink III"}, 86 {ISA_ID_3C509_COMBO, "3Com 3C509-Combo EtherLink III"}, 87 {ISA_ID_3C509_TPO, "3Com 3C509-TPO EtherLink III"}, 88 {ISA_ID_3C509_TPC, "3Com 3C509-TPC EtherLink III"}, 89 {0, NULL}, 90 }; 91 #endif 92 93 static struct isa_pnp_id ep_ids[] = { 94 {0x90506d50, "3Com 3C509B-TP EtherLink III (PnP)"}, /* TCM5090 */ 95 {0x91506d50, "3Com 3C509B-BNC EtherLink III (PnP)"}, /* TCM5091 */ 96 {0x94506d50, "3Com 3C509B-Combo EtherLink III (PnP)"}, /* TCM5094 */ 97 {0x95506d50, "3Com 3C509B-TPO EtherLink III (PnP)"}, /* TCM5095 */ 98 {0x98506d50, "3Com 3C509B-TPC EtherLink III (PnP)"}, /* TCM5098 */ 99 {0xf780d041, NULL}, /* PNP80f7 */ 100 {0, NULL}, 101 }; 102 103 /* 104 * We get eeprom data from the id_port given an offset into the eeprom. 105 * Basically; after the ID_sequence is sent to all of the cards; they enter 106 * the ID_CMD state where they will accept command requests. 0x80-0xbf loads 107 * the eeprom data. We then read the port 16 times and with every read; the 108 * cards check for contention (ie: if one card writes a 0 bit and another 109 * writes a 1 bit then the host sees a 0. At the end of the cycle; each card 110 * compares the data on the bus; if there is a difference then that card goes 111 * into ID_WAIT state again). In the meantime; one bit of data is returned in 112 * the AX register which is conveniently returned to us by inb(). Hence; we 113 * read 16 times getting one bit of data with each read. 114 */ 115 #ifdef __i386__ 116 static uint16_t 117 get_eeprom_data(int id_port, int offset) 118 { 119 int i; 120 uint16_t data = 0; 121 122 outb(id_port, EEPROM_CMD_RD | offset); 123 DELAY(BIT_DELAY_MULTIPLE * 1000); 124 for (i = 0; i < 16; i++) { 125 DELAY(50); 126 data = (data << 1) | (inw(id_port) & 1); 127 } 128 return (data); 129 } 130 #endif 131 132 const char * 133 ep_isa_match_id(uint32_t id, struct isa_ident *isa_devs) 134 { 135 struct isa_ident *i = isa_devs; 136 137 while (i->name != NULL) { 138 if (id == i->id) 139 return (i->name); 140 i++; 141 } 142 /* 143 * If we see a card that is likely to be a 3c509 144 * return something so that it will work; be annoying 145 * so that the user will tell us about it though. 146 */ 147 if ((id >> 4) == ISA_ID_3C509_XXX) 148 return ("Unknown 3c509; notify maintainer!"); 149 return (NULL); 150 } 151 152 #ifdef __i386__ 153 static void 154 ep_isa_identify(driver_t * driver, device_t parent) 155 { 156 int tag = EP_LAST_TAG; 157 int found = 0; 158 int i; 159 int j; 160 const char *desc; 161 uint16_t data; 162 uint32_t irq; 163 uint32_t ioport; 164 uint32_t isa_id; 165 device_t child; 166 167 outb(ELINK_ID_PORT, 0); 168 outb(ELINK_ID_PORT, 0); 169 elink_idseq(ELINK_509_POLY); 170 elink_reset(); 171 172 DELAY(DELAY_MULTIPLE * 10000); 173 174 for (i = 0; i < EP_MAX_BOARDS; i++) { 175 176 outb(ELINK_ID_PORT, 0); 177 outb(ELINK_ID_PORT, 0); 178 elink_idseq(ELINK_509_POLY); 179 DELAY(400); 180 181 /* 182 * For the first probe, clear all board's tag registers. 183 * Otherwise kill off already-found boards. -- linux 3c509.c 184 */ 185 if (i == 0) 186 outb(ELINK_ID_PORT, 0xd0); 187 else 188 outb(ELINK_ID_PORT, 0xd8); 189 190 /* Get out of loop if we're out of cards. */ 191 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_MFG_ID); 192 if (data != MFG_ID) 193 break; 194 /* resolve contention using the Ethernet address */ 195 for (j = 0; j < 3; j++) 196 (void)get_eeprom_data(ELINK_ID_PORT, j); 197 198 /* 199 * Construct an 'isa_id' in 'EISA' format. 200 */ 201 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_MFG_ID); 202 isa_id = (htons(data) << 16); 203 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_PROD_ID); 204 isa_id |= htons(data); 205 206 /* Find known ISA boards */ 207 desc = ep_isa_match_id(isa_id, ep_isa_devs); 208 if (!desc) { 209 if (bootverbose) 210 device_printf(parent, 211 "unknown ID 0x%08x\n", isa_id); 212 continue; 213 } 214 /* Retreive IRQ */ 215 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_RESOURCE_CFG); 216 irq = (data >> 12); 217 218 /* Retreive IOPORT */ 219 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_ADDR_CFG); 220 ioport = (((data & ADDR_CFG_MASK) << 4) + 0x200); 221 222 if ((data & ADDR_CFG_MASK) == ADDR_CFG_EISA) { 223 device_printf(parent, 224 "<%s> at port 0x%03x in EISA mode, ignoring!\n", 225 desc, ioport); 226 /* 227 * Set the adaptor tag so that the next card can be 228 * found. 229 */ 230 outb(ELINK_ID_PORT, tag--); 231 continue; 232 } 233 /* Test for an adapter with PnP support. */ 234 data = get_eeprom_data(ELINK_ID_PORT, EEPROM_CAP); 235 if (data == CAP_ISA) { 236 data = get_eeprom_data(ELINK_ID_PORT, 237 EEPROM_INT_CONFIG_1); 238 if (data & ICW1_IAS_PNP) { 239 if (bootverbose) 240 device_printf(parent, 241 "<%s> at 0x%03x " 242 "in PnP mode!\n", 243 desc, ioport); 244 /* 245 * Set the adaptor tag so that the next card 246 * can be found. 247 */ 248 outb(ELINK_ID_PORT, tag--); 249 continue; 250 } 251 } 252 /* Set the adaptor tag so that the next card can be found. */ 253 outb(ELINK_ID_PORT, tag--); 254 255 /* Activate the adaptor at the EEPROM location. */ 256 outb(ELINK_ID_PORT, ACTIVATE_ADAPTER_TO_CONFIG); 257 258 /* Test for an adapter in TEST mode. */ 259 outw(ioport + EP_COMMAND, WINDOW_SELECT | 0); 260 data = inw(ioport + EP_W0_EEPROM_COMMAND); 261 if (data & EEPROM_TST_MODE) { 262 device_printf(parent, 263 "<%s> at port 0x%03x in TEST mode!" 264 " Erase pencil mark.\n", 265 desc, ioport); 266 continue; 267 } 268 child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "ep", -1); 269 device_set_desc_copy(child, desc); 270 device_set_driver(child, driver); 271 bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1); 272 bus_set_resource(child, SYS_RES_IOPORT, 0, ioport, EP_IOSIZE); 273 274 if (bootverbose) 275 device_printf(parent, 276 "<%s>" 277 " at port 0x%03x-0x%03x irq %d\n", 278 desc, ioport, ioport + EP_IOSIZE, irq); 279 found++; 280 } 281 } 282 #endif 283 284 static int 285 ep_isa_probe(device_t dev) 286 { 287 int error = 0; 288 289 /* Check isapnp ids */ 290 error = ISA_PNP_PROBE(device_get_parent(dev), dev, ep_ids); 291 292 /* If the card had a PnP ID that didn't match any we know about */ 293 if (error == ENXIO) 294 return (error); 295 296 /* If we had some other problem. */ 297 if (!(error == 0 || error == ENOENT)) 298 return (error); 299 300 /* If we have the resources we need then we're good to go. */ 301 if ((bus_get_resource_start(dev, SYS_RES_IOPORT, 0) != 0) && 302 (bus_get_resource_start(dev, SYS_RES_IRQ, 0) != 0)) 303 return (0); 304 305 return (ENXIO); 306 } 307 308 static int 309 ep_isa_attach(device_t dev) 310 { 311 struct ep_softc *sc = device_get_softc(dev); 312 int error = 0; 313 314 if ((error = ep_alloc(dev))) 315 goto bad; 316 ep_get_media(sc); 317 318 GO_WINDOW(sc, 0); 319 SET_IRQ(sc, rman_get_start(sc->irq)); 320 321 if ((error = ep_attach(sc))) 322 goto bad; 323 error = ep_eeprom_cksum(sc); 324 if (error) { 325 device_printf(sc->dev, "Invalid EEPROM checksum!\n"); 326 goto bad; 327 } 328 if ((error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE, 329 NULL, ep_intr, sc, &sc->ep_intrhand))) { 330 device_printf(dev, "bus_setup_intr() failed! (%d)\n", error); 331 goto bad; 332 } 333 return (0); 334 bad: 335 ep_free(dev); 336 return (error); 337 } 338 339 static int 340 ep_eeprom_cksum(struct ep_softc *sc) 341 { 342 int i; 343 int error; 344 uint16_t val; 345 uint16_t cksum; 346 uint8_t cksum_high = 0; 347 uint8_t cksum_low = 0; 348 349 error = ep_get_e(sc, 0x0f, &val); 350 if (error) 351 return (ENXIO); 352 cksum = val; 353 354 for (i = 0; i < 0x0f; i++) { 355 error = ep_get_e(sc, i, &val); 356 if (error) 357 return (ENXIO); 358 switch (i) { 359 case 0x08: 360 case 0x09: 361 case 0x0d: 362 cksum_low ^= (uint8_t) (val & 0x00ff) ^ 363 (uint8_t)((val & 0xff00) >> 8); 364 break; 365 default: 366 cksum_high ^= (uint8_t) (val & 0x00ff) ^ 367 (uint8_t)((val & 0xff00) >> 8); 368 break; 369 } 370 } 371 return (cksum != ((uint16_t)cksum_low | (uint16_t)(cksum_high << 8))); 372 } 373 374 static device_method_t ep_isa_methods[] = { 375 /* Device interface */ 376 #ifdef __i386__ 377 DEVMETHOD(device_identify, ep_isa_identify), 378 #endif 379 DEVMETHOD(device_probe, ep_isa_probe), 380 DEVMETHOD(device_attach, ep_isa_attach), 381 DEVMETHOD(device_detach, ep_detach), 382 383 DEVMETHOD_END 384 }; 385 386 static driver_t ep_isa_driver = { 387 "ep", 388 ep_isa_methods, 389 sizeof(struct ep_softc), 390 }; 391 392 extern devclass_t ep_devclass; 393 394 DRIVER_MODULE(ep, isa, ep_isa_driver, ep_devclass, 0, 0); 395 #ifdef __i386__ 396 MODULE_DEPEND(ep, elink, 1, 1, 1); 397 #endif 398 ISA_PNP_INFO(ep_ids);
Cache object: da0b8b99f5c1dee014fc97099ede4628
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