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/arcdevice.h> 37 #include <linux/com20020.h> 38 39 #include <asm/io.h> 40 41 #define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n" 42 43 static char *clockrates[] = 44 {"10 Mb/s", "Reserved", "5 Mb/s", 45 "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s", 46 "156.25 Kb/s", "Reserved", "Reserved", "Reserved"}; 47 48 static void com20020_command(struct net_device *dev, int command); 49 static int com20020_status(struct net_device *dev); 50 static void com20020_setmask(struct net_device *dev, int mask); 51 static int com20020_reset(struct net_device *dev, int really_reset); 52 static void com20020_copy_to_card(struct net_device *dev, int bufnum, 53 int offset, void *buf, int count); 54 static void com20020_copy_from_card(struct net_device *dev, int bufnum, 55 int offset, void *buf, int count); 56 static void com20020_set_mc_list(struct net_device *dev); 57 static void com20020_close(struct net_device *); 58 59 static void com20020_copy_from_card(struct net_device *dev, int bufnum, 60 int offset, void *buf, int count) 61 { 62 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 63 64 /* set up the address register */ 65 outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI); 66 outb(ofs & 0xff, _ADDR_LO); 67 68 /* copy the data */ 69 TIME("insb", count, insb(_MEMDATA, buf, count)); 70 } 71 72 73 static void com20020_copy_to_card(struct net_device *dev, int bufnum, 74 int offset, void *buf, int count) 75 { 76 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 77 78 /* set up the address register */ 79 outb((ofs >> 8) | AUTOINCflag, _ADDR_HI); 80 outb(ofs & 0xff, _ADDR_LO); 81 82 /* copy the data */ 83 TIME("outsb", count, outsb(_MEMDATA, buf, count)); 84 } 85 86 87 /* Reset the card and check some basic stuff during the detection stage. */ 88 int com20020_check(struct net_device *dev) 89 { 90 int ioaddr = dev->base_addr, status; 91 struct arcnet_local *lp = netdev_priv(dev); 92 93 ARCRESET0; 94 mdelay(RESETtime); 95 96 lp->setup = lp->clockm ? 0 : (lp->clockp << 1); 97 lp->setup2 = (lp->clockm << 4) | 8; 98 99 /* CHECK: should we do this for SOHARD cards ? */ 100 /* Enable P1Mode for backplane mode */ 101 lp->setup = lp->setup | P1MODE; 102 103 SET_SUBADR(SUB_SETUP1); 104 outb(lp->setup, _XREG); 105 106 if (lp->clockm != 0) 107 { 108 SET_SUBADR(SUB_SETUP2); 109 outb(lp->setup2, _XREG); 110 111 /* must now write the magic "restart operation" command */ 112 mdelay(1); 113 outb(0x18, _COMMAND); 114 } 115 116 lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2); 117 /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ 118 SETCONF; 119 outb(0x42, ioaddr + BUS_ALIGN*7); 120 121 status = ASTATUS(); 122 123 if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { 124 BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status); 125 return -ENODEV; 126 } 127 BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status); 128 129 /* Enable TX */ 130 outb(0x39, _CONFIG); 131 outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7); 132 133 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 134 135 status = ASTATUS(); 136 BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n", 137 status); 138 139 /* Read first location of memory */ 140 outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI); 141 outb(0, _ADDR_LO); 142 143 if ((status = inb(_MEMDATA)) != TESTvalue) { 144 BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n", 145 status); 146 return -ENODEV; 147 } 148 return 0; 149 } 150 151 const struct net_device_ops com20020_netdev_ops = { 152 .ndo_open = arcnet_open, 153 .ndo_stop = arcnet_close, 154 .ndo_start_xmit = arcnet_send_packet, 155 .ndo_tx_timeout = arcnet_timeout, 156 .ndo_set_multicast_list = com20020_set_mc_list, 157 }; 158 159 /* Set up the struct net_device associated with this card. Called after 160 * probing succeeds. 161 */ 162 int com20020_found(struct net_device *dev, int shared) 163 { 164 struct arcnet_local *lp; 165 int ioaddr = dev->base_addr; 166 167 /* Initialize the rest of the device structure. */ 168 169 lp = netdev_priv(dev); 170 171 lp->hw.owner = THIS_MODULE; 172 lp->hw.command = com20020_command; 173 lp->hw.status = com20020_status; 174 lp->hw.intmask = com20020_setmask; 175 lp->hw.reset = com20020_reset; 176 lp->hw.copy_to_card = com20020_copy_to_card; 177 lp->hw.copy_from_card = com20020_copy_from_card; 178 lp->hw.close = com20020_close; 179 180 if (!dev->dev_addr[0]) 181 dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */ 182 183 SET_SUBADR(SUB_SETUP1); 184 outb(lp->setup, _XREG); 185 186 if (lp->card_flags & ARC_CAN_10MBIT) 187 { 188 SET_SUBADR(SUB_SETUP2); 189 outb(lp->setup2, _XREG); 190 191 /* must now write the magic "restart operation" command */ 192 mdelay(1); 193 outb(0x18, _COMMAND); 194 } 195 196 lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; 197 /* Default 0x38 + register: Node ID */ 198 SETCONF; 199 outb(dev->dev_addr[0], _XREG); 200 201 /* reserve the irq */ 202 if (request_irq(dev->irq, arcnet_interrupt, shared, 203 "arcnet (COM20020)", dev)) { 204 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); 205 return -ENODEV; 206 } 207 208 dev->base_addr = ioaddr; 209 210 BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", 211 lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); 212 213 if (lp->backplane) 214 BUGMSG(D_NORMAL, "Using backplane mode.\n"); 215 216 if (lp->timeout != 3) 217 BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); 218 219 BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", 220 lp->setup >> 1, 221 clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); 222 223 if (register_netdev(dev)) { 224 free_irq(dev->irq, dev); 225 return -EIO; 226 } 227 return 0; 228 } 229 230 231 /* 232 * Do a hardware reset on the card, and set up necessary registers. 233 * 234 * This should be called as little as possible, because it disrupts the 235 * token on the network (causes a RECON) and requires a significant delay. 236 * 237 * However, it does make sure the card is in a defined state. 238 */ 239 static int com20020_reset(struct net_device *dev, int really_reset) 240 { 241 struct arcnet_local *lp = netdev_priv(dev); 242 u_int ioaddr = dev->base_addr; 243 u_char inbyte; 244 245 BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", 246 __FILE__,__LINE__,__func__,dev,lp,dev->name); 247 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", 248 dev->name, ASTATUS()); 249 250 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 251 lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); 252 /* power-up defaults */ 253 SETCONF; 254 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 255 256 if (really_reset) { 257 /* reset the card */ 258 ARCRESET; 259 mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ 260 } 261 /* clear flags & end reset */ 262 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 263 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 264 265 /* verify that the ARCnet signature byte is present */ 266 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 267 268 com20020_copy_from_card(dev, 0, 0, &inbyte, 1); 269 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 270 if (inbyte != TESTvalue) { 271 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 272 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); 273 return 1; 274 } 275 /* enable extended (512-byte) packets */ 276 ACOMMAND(CONFIGcmd | EXTconf); 277 BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__); 278 279 /* done! return success. */ 280 return 0; 281 } 282 283 284 static void com20020_setmask(struct net_device *dev, int mask) 285 { 286 u_int ioaddr = dev->base_addr; 287 BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr); 288 AINTMASK(mask); 289 } 290 291 292 static void com20020_command(struct net_device *dev, int cmd) 293 { 294 u_int ioaddr = dev->base_addr; 295 ACOMMAND(cmd); 296 } 297 298 299 static int com20020_status(struct net_device *dev) 300 { 301 u_int ioaddr = dev->base_addr; 302 303 return ASTATUS() + (ADIAGSTATUS()<<8); 304 } 305 306 static void com20020_close(struct net_device *dev) 307 { 308 struct arcnet_local *lp = netdev_priv(dev); 309 int ioaddr = dev->base_addr; 310 311 /* disable transmitter */ 312 lp->config &= ~TXENcfg; 313 SETCONF; 314 } 315 316 /* Set or clear the multicast filter for this adaptor. 317 * num_addrs == -1 Promiscuous mode, receive all packets 318 * num_addrs == 0 Normal mode, clear multicast list 319 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 320 * best-effort filtering. 321 * FIXME - do multicast stuff, not just promiscuous. 322 */ 323 static void com20020_set_mc_list(struct net_device *dev) 324 { 325 struct arcnet_local *lp = netdev_priv(dev); 326 int ioaddr = dev->base_addr; 327 328 if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ 329 if (!(lp->setup & PROMISCset)) 330 BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); 331 SET_SUBADR(SUB_SETUP1); 332 lp->setup |= PROMISCset; 333 outb(lp->setup, _XREG); 334 } else 335 /* Disable promiscuous mode, use normal mode */ 336 { 337 if ((lp->setup & PROMISCset)) 338 BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); 339 SET_SUBADR(SUB_SETUP1); 340 lp->setup &= ~PROMISCset; 341 outb(lp->setup, _XREG); 342 } 343 } 344 345 #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ 346 defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ 347 defined(CONFIG_ARCNET_COM20020_CS_MODULE) 348 EXPORT_SYMBOL(com20020_check); 349 EXPORT_SYMBOL(com20020_found); 350 EXPORT_SYMBOL(com20020_netdev_ops); 351 #endif 352 353 MODULE_LICENSE("GPL"); 354 355 #ifdef MODULE 356 357 static int __init com20020_module_init(void) 358 { 359 BUGLVL(D_NORMAL) printk(VERSION); 360 return 0; 361 } 362 363 static void __exit com20020_module_exit(void) 364 { 365 } 366 module_init(com20020_module_init); 367 module_exit(com20020_module_exit); 368 #endif /* MODULE */ 369