Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Jeff Morrow | 52edc17 | 2007-02-16 01:42:27 -0800 | [diff] [blame] | 107 | if (lp->clockm != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Randy Dunlap | ace48ff | 2006-11-08 19:51:03 -0800 | [diff] [blame] | 340 | #if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ |
Randy Dunlap | 2a10387 | 2007-02-12 00:52:22 -0800 | [diff] [blame] | 341 | defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ |
| 342 | defined(CONFIG_ARCNET_COM20020_CS_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | EXPORT_SYMBOL(com20020_check); |
| 344 | EXPORT_SYMBOL(com20020_found); |
Randy Dunlap | ace48ff | 2006-11-08 19:51:03 -0800 | [diff] [blame] | 345 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
| 347 | MODULE_LICENSE("GPL"); |
| 348 | |
Randy Dunlap | ace48ff | 2006-11-08 19:51:03 -0800 | [diff] [blame] | 349 | #ifdef MODULE |
| 350 | |
Jon Schindler | 0ebd1c1 | 2008-02-28 01:31:08 -0600 | [diff] [blame] | 351 | static int __init com20020_module_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | { |
| 353 | BUGLVL(D_NORMAL) printk(VERSION); |
| 354 | return 0; |
| 355 | } |
| 356 | |
Jon Schindler | 0ebd1c1 | 2008-02-28 01:31:08 -0600 | [diff] [blame] | 357 | static void __exit com20020_module_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
| 359 | } |
Jon Schindler | 0ebd1c1 | 2008-02-28 01:31:08 -0600 | [diff] [blame] | 360 | module_init(com20020_module_init); |
| 361 | module_exit(com20020_module_exit); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | #endif /* MODULE */ |