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 44static 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 49static void com20020_command(struct net_device *dev, int command); 50static int com20020_status(struct net_device *dev); 51static void com20020_setmask(struct net_device *dev, int mask); 52static int com20020_reset(struct net_device *dev, int really_reset); 53static void com20020_openclose(struct net_device *dev, bool open); 54static void com20020_copy_to_card(struct net_device *dev, int bufnum, 55 int offset, void *buf, int count); 56static void com20020_copy_from_card(struct net_device *dev, int bufnum, 57 int offset, void *buf, int count); 58static void com20020_set_mc_list(struct net_device *dev); 59 60 61static void com20020_copy_from_card(struct net_device *dev, int bufnum, 62 int offset, void *buf, int count) 63{ 64 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 65 66 /* set up the address register */ 67 outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI); 68 outb(ofs & 0xff, _ADDR_LO); 69 70 /* copy the data */ 71 TIME("insb", count, insb(_MEMDATA, buf, count)); 72} 73 74 75static void com20020_copy_to_card(struct net_device *dev, int bufnum, 76 int offset, void *buf, int count) 77{ 78 int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; 79 80 /* set up the address register */ 81 outb((ofs >> 8) | AUTOINCflag, _ADDR_HI); 82 outb(ofs & 0xff, _ADDR_LO); 83 84 /* copy the data */ 85 TIME("outsb", count, outsb(_MEMDATA, buf, count)); 86} 87 88 89/* Reset the card and check some basic stuff during the detection stage. */ 90int __devinit com20020_check(struct net_device *dev) 91{ 92 int ioaddr = dev->base_addr, status; 93 struct arcnet_local *lp = dev->priv; 94 95 ARCRESET0; 96 mdelay(RESETtime); 97 98 lp->setup = lp->clockm ? 0 : (lp->clockp << 1); 99 lp->setup2 = (lp->clockm << 4) | 8; 100 101 SET_SUBADR(SUB_SETUP1); 102 outb(lp->setup, _XREG); 103 104 if (lp->card_flags & ARC_CAN_10MBIT) 105 { 106 SET_SUBADR(SUB_SETUP2); 107 outb(lp->setup2, _XREG); 108 109 /* must now write the magic "restart operation" command */ 110 mdelay(1); 111 outb(0x18, _COMMAND); 112 } 113 114 lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2); 115 /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ 116 SETCONF; 117 outb(0x42, ioaddr + 7); 118 119 status = ASTATUS(); 120 121 if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { 122 BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status); 123 return -ENODEV; 124 } 125 BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status); 126 127 /* Enable TX */ 128 outb(0x39, _CONFIG); 129 outb(inb(ioaddr + 8), ioaddr + 7); 130 131 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 132 133 status = ASTATUS(); 134 BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n", 135 status); 136 137 /* Read first location of memory */ 138 outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI); 139 outb(0, _ADDR_LO); 140 141 if ((status = inb(_MEMDATA)) != TESTvalue) { 142 BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n", 143 status); 144 return -ENODEV; 145 } 146 return 0; 147} 148 149/* Set up the struct net_device associated with this card. Called after 150 * probing succeeds. 151 */ 152int __devinit com20020_found(struct net_device *dev, int shared) 153{ 154 struct arcnet_local *lp; 155 int ioaddr = dev->base_addr; 156 157 /* Initialize the rest of the device structure. */ 158 159 lp = (struct arcnet_local *) dev->priv; 160 161 lp->hw.command = com20020_command; 162 lp->hw.status = com20020_status; 163 lp->hw.intmask = com20020_setmask; 164 lp->hw.reset = com20020_reset; 165 lp->hw.open_close = com20020_openclose; 166 lp->hw.copy_to_card = com20020_copy_to_card; 167 lp->hw.copy_from_card = com20020_copy_from_card; 168 169 dev->set_multicast_list = com20020_set_mc_list; 170 171 /* Fill in the fields of the device structure with generic 172 * values. 173 */ 174 arcdev_setup(dev); 175 176 if (!dev->dev_addr[0]) 177 dev->dev_addr[0] = inb(ioaddr + 8); 178 179 SET_SUBADR(SUB_SETUP1); 180 outb(lp->setup, _XREG); 181 182 if (lp->card_flags & ARC_CAN_10MBIT) 183 { 184 SET_SUBADR(SUB_SETUP2); 185 outb(lp->setup2, _XREG); 186 187 /* must now write the magic "restart operation" command */ 188 mdelay(1); 189 outb(0x18, _COMMAND); 190 } 191 192 193 lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1; 194 /* Default 0x38 + register: Node ID */ 195 SETCONF; 196 outb(dev->dev_addr[0], _XREG); 197 198 /* reserve the irq */ 199 if (request_irq(dev->irq, &arcnet_interrupt, shared, 200 "arcnet (COM20020)", dev)) { 201 BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); 202 return -ENODEV; 203 } 204 /* reserve the I/O region */ 205 if (request_region(ioaddr, ARCNET_TOTAL_SIZE, "arcnet (COM20020)")) { 206 free_irq(dev->irq, dev); 207 return -EBUSY; 208 } 209 dev->base_addr = ioaddr; 210 211 BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n", 212 lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); 213 214 if (lp->backplane) 215 BUGMSG(D_NORMAL, "Using backplane mode.\n"); 216 217 if (lp->timeout != 3) 218 BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout); 219 220 BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n", 221 lp->setup >> 1, 222 clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]); 223 224 if (!dev->init && register_netdev(dev)) { 225 free_irq(dev->irq, dev); 226 release_region(ioaddr, ARCNET_TOTAL_SIZE); 227 return -EIO; 228 } 229 return 0; 230} 231 232 233/* 234 * Do a hardware reset on the card, and set up necessary registers. 235 * 236 * This should be called as little as possible, because it disrupts the 237 * token on the network (causes a RECON) and requires a significant delay. 238 * 239 * However, it does make sure the card is in a defined state. 240 */ 241static int com20020_reset(struct net_device *dev, int really_reset) 242{ 243 struct arcnet_local *lp = (struct arcnet_local *) dev->priv; 244 short ioaddr = dev->base_addr; 245 u_char inbyte; 246 247 BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", 248 dev->name, ASTATUS()); 249 250 lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); 251 /* power-up defaults */ 252 SETCONF; 253 254 if (really_reset) { 255 /* reset the card */ 256 ARCRESET; 257 mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */ 258 } 259 /* clear flags & end reset */ 260 ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); 261 262 /* verify that the ARCnet signature byte is present */ 263 264 com20020_copy_from_card(dev, 0, 0, &inbyte, 1); 265 if (inbyte != TESTvalue) { 266 BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n"); 267 return 1; 268 } 269 /* enable extended (512-byte) packets */ 270 ACOMMAND(CONFIGcmd | EXTconf); 271 272 /* done! return success. */ 273 return 0; 274} 275 276 277static void com20020_setmask(struct net_device *dev, int mask) 278{ 279 short ioaddr = dev->base_addr; 280 AINTMASK(mask); 281} 282 283 284static void com20020_command(struct net_device *dev, int cmd) 285{ 286 short ioaddr = dev->base_addr; 287 ACOMMAND(cmd); 288} 289 290 291static int com20020_status(struct net_device *dev) 292{ 293 short ioaddr = dev->base_addr; 294 return ASTATUS(); 295} 296 297 298static void com20020_openclose(struct net_device *dev, bool open) 299{ 300 struct arcnet_local *lp = (struct arcnet_local *) dev->priv; 301 int ioaddr = dev->base_addr; 302 303 if (open) 304 MOD_INC_USE_COUNT; 305 else { 306 /* disable transmitter */ 307 lp->config &= ~TXENcfg; 308 SETCONF; 309 MOD_DEC_USE_COUNT; 310 } 311 lp->hw.open_close_ll(dev, open); 312} 313 314 315static void com20020_set_mc_list(struct net_device *dev) 316{ 317 struct arcnet_local *lp = dev->priv; 318 int ioaddr = dev->base_addr; 319 320 if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */ 321 if (!(lp->setup & PROMISCset)) 322 BUGMSG(D_NORMAL, "Setting promiscuous flag...\n"); 323 SET_SUBADR(SUB_SETUP1); 324 lp->setup |= PROMISCset; 325 outb(lp->setup, _XREG); 326 } else 327 /* Disable promiscuous mode, use normal mode */ 328 { 329 if ((lp->setup & PROMISCset)) 330 BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n"); 331 SET_SUBADR(SUB_SETUP1); 332 lp->setup &= ~PROMISCset; 333 outb(lp->setup, _XREG); 334 } 335} 336 337void __devexit com20020_remove(struct net_device *dev) 338{ 339 unregister_netdev(dev); 340 free_irq(dev->irq, dev); 341 release_region(dev->base_addr, ARCNET_TOTAL_SIZE); 342 kfree(dev->priv); 343 kfree(dev); 344} 345 346#ifdef MODULE 347 348EXPORT_SYMBOL(com20020_check); 349EXPORT_SYMBOL(com20020_found); 350EXPORT_SYMBOL(com20020_remove); 351 352MODULE_LICENSE("GPL"); 353 354int init_module(void) 355{ 356 BUGLVL(D_NORMAL) printk(VERSION); 357 return 0; 358} 359 360void cleanup_module(void) 361{ 362} 363 364#endif /* MODULE */ 365