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/errno.h> 33 #include <linux/delay.h> 34 #include <linux/netdevice.h> 35 #include <linux/init.h> 36 #include <linux/interrupt.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 = netdev_priv(dev); 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 static int com20020_set_hwaddr(struct net_device *dev, void *addr) 153 { 154 int ioaddr = dev->base_addr; 155 struct arcnet_local *lp = netdev_priv(dev); 156 struct sockaddr *hwaddr = addr; 157 158 memcpy(dev->dev_addr, hwaddr->sa_data, 1); 159 SET_SUBADR(SUB_NODE); 160 outb(dev->dev_addr[0], _XREG); 161 162 return 0; 163 } 164 165 const struct net_device_ops com20020_netdev_ops = { 166 .ndo_open = arcnet_open, 167 .ndo_stop = arcnet_close, 168 .ndo_start_xmit = arcnet_send_packet, 169 .ndo_tx_timeout = arcnet_timeout, 170 .ndo_set_mac_address = com20020_set_hwaddr, 171 .ndo_set_rx_mode = com20020_set_mc_list, 172 }; 173 174 /* Set up the struct net_device associated with this card. Called after 175 * probing succeeds. 176 */ 177 int com20020_found(struct net_device *dev, int shared) 178 { 179 struct arcnet_local *lp; 180 int ioaddr = dev->base_addr; 181 182 /* Initialize the rest of the device structure. */ 183 184 lp = netdev_priv(dev); 185 186 lp->hw.owner = THIS_MODULE; 187 lp->hw.command = com20020_command; 188 lp->hw.status = com20020_status; 189 lp->hw.intmask = com20020_setmask; 190 lp->hw.reset = com20020_reset; 191 lp->hw.copy_to_card = com20020_copy_to_card; 192 lp->hw.copy_from_card = com20020_copy_from_card; 193 lp->hw.close = com20020_close; 194 195 if (!dev->dev_addr[0]) 196 dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */ 197 198 SET_SUBADR(SUB_SETUP1); 199 outb(lp->setup, _XREG); 200 201 if (lp->card_flags & ARC_CAN_10MBIT) 202 { 203 SET_SUBADR(SUB_SETUP2); 204 outb(lp->setup2, _XREG); 205 206 /* must now write the magic "restart operation" command */ 207 mdelay(1); 208 outb(0x18, _COMMAND); 209 } 210 211 lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; 212 /* Default 0x38 + register: Node ID */ 213 SETCONF; 214 outb(dev->dev_addr[0], _XREG); 215 216 /* reserve the irq */ 217 if (request_irq(dev->irq, arcnet_interrupt, shared, 218 "arcnet (COM20020)", dev)) { 219 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); 220 return -ENODEV; 221 } 222 223 dev->base_addr = ioaddr; 224 225 BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", 226 lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); 227 228 if (lp->backplane) 229 BUGMSG(D_NORMAL, "Using backplane mode.\n"); 230 231 if (lp->timeout != 3) 232 BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); 233 234 BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", 235 lp->setup >> 1, 236 clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); 237 238 if (register_netdev(dev)) { 239 free_irq(dev->irq, dev); 240 return -EIO; 241 } 242 return 0; 243 } 244 245 246 /* 247 * Do a hardware reset on the card, and set up necessary registers. 248 * 249 * This should be called as little as possible, because it disrupts the 250 * token on the network (causes a RECON) and requires a significant delay. 251 * 252 * However, it does make sure the card is in a defined state. 253 */ 254 static int com20020_reset(struct net_device *dev, int really_reset) 255 { 256 struct arcnet_local *lp = netdev_priv(dev); 257 u_int ioaddr = dev->base_addr; 258 u_char inbyte; 259 260 BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", 261 __FILE__,__LINE__,__func__,dev,lp,dev->name); 262 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", 263 dev->name, ASTATUS()); 264 265 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 266 lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); 267 /* power-up defaults */ 268 SETCONF; 269 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 270 271 if (really_reset) { 272 /* reset the card */ 273 ARCRESET; 274 mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ 275 } 276 /* clear flags & end reset */ 277 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 278 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 279 280 /* verify that the ARCnet signature byte is present */ 281 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 282 283 com20020_copy_from_card(dev, 0, 0, &inbyte, 1); 284 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 285 if (inbyte != TESTvalue) { 286 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 287 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); 288 return 1; 289 } 290 /* enable extended (512-byte) packets */ 291 ACOMMAND(CONFIGcmd | EXTconf); 292 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 293 294 /* done! return success. */ 295 return 0; 296 } 297 298 299 static void com20020_setmask(struct net_device *dev, int mask) 300 { 301 u_int ioaddr = dev->base_addr; 302 BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr); 303 AINTMASK(mask); 304 } 305 306 307 static void com20020_command(struct net_device *dev, int cmd) 308 { 309 u_int ioaddr = dev->base_addr; 310 ACOMMAND(cmd); 311 } 312 313 314 static int com20020_status(struct net_device *dev) 315 { 316 u_int ioaddr = dev->base_addr; 317 318 return ASTATUS() + (ADIAGSTATUS()<<8); 319 } 320 321 static void com20020_close(struct net_device *dev) 322 { 323 struct arcnet_local *lp = netdev_priv(dev); 324 int ioaddr = dev->base_addr; 325 326 /* disable transmitter */ 327 lp->config &= ~TXENcfg; 328 SETCONF; 329 } 330 331 /* Set or clear the multicast filter for this adaptor. 332 * num_addrs == -1 Promiscuous mode, receive all packets 333 * num_addrs == 0 Normal mode, clear multicast list 334 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 335 * best-effort filtering. 336 * FIXME - do multicast stuff, not just promiscuous. 337 */ 338 static void com20020_set_mc_list(struct net_device *dev) 339 { 340 struct arcnet_local *lp = netdev_priv(dev); 341 int ioaddr = dev->base_addr; 342 343 if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ 344 if (!(lp->setup & PROMISCset)) 345 BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); 346 SET_SUBADR(SUB_SETUP1); 347 lp->setup |= PROMISCset; 348 outb(lp->setup, _XREG); 349 } else 350 /* Disable promiscuous mode, use normal mode */ 351 { 352 if ((lp->setup & PROMISCset)) 353 BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); 354 SET_SUBADR(SUB_SETUP1); 355 lp->setup &= ~PROMISCset; 356 outb(lp->setup, _XREG); 357 } 358 } 359 360 #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ 361 defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ 362 defined(CONFIG_ARCNET_COM20020_CS_MODULE) 363 EXPORT_SYMBOL(com20020_check); 364 EXPORT_SYMBOL(com20020_found); 365 EXPORT_SYMBOL(com20020_netdev_ops); 366 #endif 367 368 MODULE_LICENSE("GPL"); 369 370 #ifdef MODULE 371 372 static int __init com20020_module_init(void) 373 { 374 BUGLVL(D_NORMAL) printk(VERSION); 375 return 0; 376 } 377 378 static void __exit com20020_module_exit(void) 379 { 380 } 381 module_init(com20020_module_init); 382 module_exit(com20020_module_exit); 383 #endif /* MODULE */ 384