1 /* 2 * Linux ARCnet driver - COM20020 chipset support 3 * 4 * Written 1997 by David Woodhouse. 5 * Written 1994-1999 by Avery Pennarun. 6 * Written 1999 by Martin Mares <mj@ucw.cz>. 7 * Derived from skeleton.c by Donald Becker. 8 * 9 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com) 10 * for sponsoring the further development of this driver. 11 * 12 * ********************** 13 * 14 * The original copyright of skeleton.c was as follows: 15 * 16 * skeleton.c Written 1993 by Donald Becker. 17 * Copyright 1993 United States Government as represented by the 18 * Director, National Security Agency. This software may only be used 19 * and distributed according to the terms of the GNU General Public License as 20 * modified by SRC, incorporated herein by reference. 21 * 22 * ********************** 23 * 24 * For more details, see drivers/net/arcnet.c 25 * 26 * ********************** 27 */ 28 #include <linux/module.h> 29 #include <linux/kernel.h> 30 #include <linux/types.h> 31 #include <linux/ioport.h> 32 #include <linux/slab.h> 33 #include <linux/errno.h> 34 #include <linux/delay.h> 35 #include <linux/netdevice.h> 36 #include <linux/init.h> 37 #include <linux/arcdevice.h> 38 #include <linux/com20020.h> 39 40 #include <asm/io.h> 41 42 #define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n" 43 44 static char *clockrates[] = 45 {"10 Mb/s", "Reserved", "5 Mb/s", 46 "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s", 47 "156.25 Kb/s", "Reserved", "Reserved", "Reserved"}; 48 49 static void com20020_command(struct net_device *dev, int command); 50 static int com20020_status(struct net_device *dev); 51 static void com20020_setmask(struct net_device *dev, int mask); 52 static int com20020_reset(struct net_device *dev, int really_reset); 53 static void com20020_copy_to_card(struct net_device *dev, int bufnum, 54 int offset, void *buf, int count); 55 static void com20020_copy_from_card(struct net_device *dev, int bufnum, 56 int offset, void *buf, int count); 57 static void com20020_set_mc_list(struct net_device *dev); 58 static void com20020_close(struct net_device *); 59 60 static void com20020_copy_from_card(struct net_device *dev, int bufnum, 61 int offset, void *buf, int count) 62 { 63 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 64 65 /* set up the address register */ 66 outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI); 67 outb(ofs & 0xff, _ADDR_LO); 68 69 /* copy the data */ 70 TIME("insb", count, insb(_MEMDATA, buf, count)); 71 } 72 73 74 static void com20020_copy_to_card(struct net_device *dev, int bufnum, 75 int offset, void *buf, int count) 76 { 77 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 78 79 /* set up the address register */ 80 outb((ofs >> 8) | AUTOINCflag, _ADDR_HI); 81 outb(ofs & 0xff, _ADDR_LO); 82 83 /* copy the data */ 84 TIME("outsb", count, outsb(_MEMDATA, buf, count)); 85 } 86 87 88 /* Reset the card and check some basic stuff during the detection stage. */ 89 int com20020_check(struct net_device *dev) 90 { 91 int ioaddr = dev->base_addr, status; 92 struct arcnet_local *lp = dev->priv; 93 94 ARCRESET0; 95 mdelay(RESETtime); 96 97 lp->setup = lp->clockm ? 0 : (lp->clockp << 1); 98 lp->setup2 = (lp->clockm << 4) | 8; 99 100 /* CHECK: should we do this for SOHARD cards ? */ 101 /* Enable P1Mode for backplane mode */ 102 lp->setup = lp->setup | P1MODE; 103 104 SET_SUBADR(SUB_SETUP1); 105 outb(lp->setup, _XREG); 106 107 if (lp->clockm != 0) 108 { 109 SET_SUBADR(SUB_SETUP2); 110 outb(lp->setup2, _XREG); 111 112 /* must now write the magic "restart operation" command */ 113 mdelay(1); 114 outb(0x18, _COMMAND); 115 } 116 117 lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2); 118 /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ 119 SETCONF; 120 outb(0x42, ioaddr + BUS_ALIGN*7); 121 122 status = ASTATUS(); 123 124 if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { 125 BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status); 126 return -ENODEV; 127 } 128 BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status); 129 130 /* Enable TX */ 131 outb(0x39, _CONFIG); 132 outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7); 133 134 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 135 136 status = ASTATUS(); 137 BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n", 138 status); 139 140 /* Read first location of memory */ 141 outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI); 142 outb(0, _ADDR_LO); 143 144 if ((status = inb(_MEMDATA)) != TESTvalue) { 145 BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n", 146 status); 147 return -ENODEV; 148 } 149 return 0; 150 } 151 152 /* Set up the struct net_device associated with this card. Called after 153 * probing succeeds. 154 */ 155 int com20020_found(struct net_device *dev, int shared) 156 { 157 struct arcnet_local *lp; 158 int ioaddr = dev->base_addr; 159 160 /* Initialize the rest of the device structure. */ 161 162 lp = dev->priv; 163 164 lp->hw.owner = THIS_MODULE; 165 lp->hw.command = com20020_command; 166 lp->hw.status = com20020_status; 167 lp->hw.intmask = com20020_setmask; 168 lp->hw.reset = com20020_reset; 169 lp->hw.copy_to_card = com20020_copy_to_card; 170 lp->hw.copy_from_card = com20020_copy_from_card; 171 lp->hw.close = com20020_close; 172 173 dev->set_multicast_list = com20020_set_mc_list; 174 175 if (!dev->dev_addr[0]) 176 dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */ 177 178 SET_SUBADR(SUB_SETUP1); 179 outb(lp->setup, _XREG); 180 181 if (lp->card_flags & ARC_CAN_10MBIT) 182 { 183 SET_SUBADR(SUB_SETUP2); 184 outb(lp->setup2, _XREG); 185 186 /* must now write the magic "restart operation" command */ 187 mdelay(1); 188 outb(0x18, _COMMAND); 189 } 190 191 lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; 192 /* Default 0x38 + register: Node ID */ 193 SETCONF; 194 outb(dev->dev_addr[0], _XREG); 195 196 /* reserve the irq */ 197 if (request_irq(dev->irq, &arcnet_interrupt, shared, 198 "arcnet (COM20020)", dev)) { 199 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); 200 return -ENODEV; 201 } 202 203 dev->base_addr = ioaddr; 204 205 BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", 206 lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); 207 208 if (lp->backplane) 209 BUGMSG(D_NORMAL, "Using backplane mode.\n"); 210 211 if (lp->timeout != 3) 212 BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); 213 214 BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", 215 lp->setup >> 1, 216 clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); 217 218 if (register_netdev(dev)) { 219 free_irq(dev->irq, dev); 220 return -EIO; 221 } 222 return 0; 223 } 224 225 226 /* 227 * Do a hardware reset on the card, and set up necessary registers. 228 * 229 * This should be called as little as possible, because it disrupts the 230 * token on the network (causes a RECON) and requires a significant delay. 231 * 232 * However, it does make sure the card is in a defined state. 233 */ 234 static int com20020_reset(struct net_device *dev, int really_reset) 235 { 236 struct arcnet_local *lp = dev->priv; 237 u_int ioaddr = dev->base_addr; 238 u_char inbyte; 239 240 BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", 241 __FILE__,__LINE__,__FUNCTION__,dev,lp,dev->name); 242 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", 243 dev->name, ASTATUS()); 244 245 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 246 lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); 247 /* power-up defaults */ 248 SETCONF; 249 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 250 251 if (really_reset) { 252 /* reset the card */ 253 ARCRESET; 254 mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ 255 } 256 /* clear flags & end reset */ 257 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 258 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 259 260 /* verify that the ARCnet signature byte is present */ 261 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 262 263 com20020_copy_from_card(dev, 0, 0, &inbyte, 1); 264 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 265 if (inbyte != TESTvalue) { 266 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 267 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); 268 return 1; 269 } 270 /* enable extended (512-byte) packets */ 271 ACOMMAND(CONFIGcmd | EXTconf); 272 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); 273 274 /* done! return success. */ 275 return 0; 276 } 277 278 279 static void com20020_setmask(struct net_device *dev, int mask) 280 { 281 u_int ioaddr = dev->base_addr; 282 BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr); 283 AINTMASK(mask); 284 } 285 286 287 static void com20020_command(struct net_device *dev, int cmd) 288 { 289 u_int ioaddr = dev->base_addr; 290 ACOMMAND(cmd); 291 } 292 293 294 static int com20020_status(struct net_device *dev) 295 { 296 u_int ioaddr = dev->base_addr; 297 298 return ASTATUS() + (ADIAGSTATUS()<<8); 299 } 300 301 static void com20020_close(struct net_device *dev) 302 { 303 struct arcnet_local *lp = dev->priv; 304 int ioaddr = dev->base_addr; 305 306 /* disable transmitter */ 307 lp->config &= ~TXENcfg; 308 SETCONF; 309 } 310 311 /* Set or clear the multicast filter for this adaptor. 312 * num_addrs == -1 Promiscuous mode, receive all packets 313 * num_addrs == 0 Normal mode, clear multicast list 314 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 315 * best-effort filtering. 316 * FIXME - do multicast stuff, not just promiscuous. 317 */ 318 static void com20020_set_mc_list(struct net_device *dev) 319 { 320 struct arcnet_local *lp = dev->priv; 321 int ioaddr = dev->base_addr; 322 323 if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ 324 if (!(lp->setup & PROMISCset)) 325 BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); 326 SET_SUBADR(SUB_SETUP1); 327 lp->setup |= PROMISCset; 328 outb(lp->setup, _XREG); 329 } else 330 /* Disable promiscuous mode, use normal mode */ 331 { 332 if ((lp->setup & PROMISCset)) 333 BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); 334 SET_SUBADR(SUB_SETUP1); 335 lp->setup &= ~PROMISCset; 336 outb(lp->setup, _XREG); 337 } 338 } 339 340 #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ 341 defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ 342 defined(CONFIG_ARCNET_COM20020_CS_MODULE) 343 EXPORT_SYMBOL(com20020_check); 344 EXPORT_SYMBOL(com20020_found); 345 #endif 346 347 MODULE_LICENSE("GPL"); 348 349 #ifdef MODULE 350 351 static int __init com20020_module_init(void) 352 { 353 BUGLVL(D_NORMAL) printk(VERSION); 354 return 0; 355 } 356 357 static void __exit com20020_module_exit(void) 358 { 359 } 360 module_init(com20020_module_init); 361 module_exit(com20020_module_exit); 362 #endif /* MODULE */ 363