1/* ac3200.c: A driver for the Ansel Communications EISA ethernet adaptor. */ 2/* 3 Written 1993, 1994 by Donald Becker. 4 Copyright 1993 United States Government as represented by the Director, 5 National Security Agency. This software may only be used and distributed 6 according to the terms of the GNU General Public License as modified by SRC, 7 incorporated herein by reference. 8 9 The author may be reached as becker@scyld.com, or C/O 10 Scyld Computing Corporation 11 410 Severn Ave., Suite 210 12 Annapolis MD 21403 13 14 This is driver for the Ansel Communications Model 3200 EISA Ethernet LAN 15 Adapter. The programming information is from the users manual, as related 16 by glee@ardnassak.math.clemson.edu. 17 18 Changelog: 19 20 Paul Gortmaker 05/98 : add support for shared mem above 1MB. 21 22 */ 23 24static const char version[] = 25 "ac3200.c:v1.01 7/1/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 26 27#include <linux/module.h> 28 29#include <linux/kernel.h> 30#include <linux/sched.h> 31#include <linux/errno.h> 32#include <linux/string.h> 33#include <linux/netdevice.h> 34#include <linux/etherdevice.h> 35#include <linux/init.h> 36 37#include <asm/system.h> 38#include <asm/io.h> 39#include <asm/irq.h> 40 41#include "8390.h" 42 43/* Offsets from the base address. */ 44#define AC_NIC_BASE 0x00 45#define AC_SA_PROM 0x16 /* The station address PROM. */ 46#define AC_ADDR0 0x00 /* Prefix station address values. */ 47#define AC_ADDR1 0x40 48#define AC_ADDR2 0x90 49#define AC_ID_PORT 0xC80 50#define AC_EISA_ID 0x0110d305 51#define AC_RESET_PORT 0xC84 52#define AC_RESET 0x00 53#define AC_ENABLE 0x01 54#define AC_CONFIG 0xC90 /* The configuration port. */ 55 56#define AC_IO_EXTENT 0x20 57 /* Actually accessed is: 58 * AC_NIC_BASE (0-15) 59 * AC_SA_PROM (0-5) 60 * AC_ID_PORT (0-3) 61 * AC_RESET_PORT 62 * AC_CONFIG 63 */ 64 65/* Decoding of the configuration register. */ 66static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3}; 67static int addrmap[8] = 68{0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 }; 69static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"}; 70 71#define config2irq(configval) config2irqmap[((configval) >> 3) & 7] 72#define config2mem(configval) addrmap[(configval) & 7] 73#define config2name(configval) port_name[((configval) >> 6) & 3] 74 75/* First and last 8390 pages. */ 76#define AC_START_PG 0x00 /* First page of 8390 TX buffer */ 77#define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */ 78 79int ac3200_probe(struct net_device *dev); 80static int ac_probe1(int ioaddr, struct net_device *dev); 81 82static int ac_open(struct net_device *dev); 83static void ac_reset_8390(struct net_device *dev); 84static void ac_block_input(struct net_device *dev, int count, 85 struct sk_buff *skb, int ring_offset); 86static void ac_block_output(struct net_device *dev, const int count, 87 const unsigned char *buf, const int start_page); 88static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, 89 int ring_page); 90 91static int ac_close_card(struct net_device *dev); 92 93 94/* Probe for the AC3200. 95 96 The AC3200 can be identified by either the EISA configuration registers, 97 or the unique value in the station address PROM. 98 */ 99 100int __init ac3200_probe(struct net_device *dev) 101{ 102 unsigned short ioaddr = dev->base_addr; 103 104 SET_MODULE_OWNER(dev); 105 106 if (ioaddr > 0x1ff) /* Check a single specified location. */ 107 return ac_probe1(ioaddr, dev); 108 else if (ioaddr > 0) /* Don't probe at all. */ 109 return -ENXIO; 110 111 if ( ! EISA_bus) 112 return -ENXIO; 113 114 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) 115 if (ac_probe1(ioaddr, dev) == 0) 116 return 0; 117 118 return -ENODEV; 119} 120 121static int __init ac_probe1(int ioaddr, struct net_device *dev) 122{ 123 int i, retval; 124 125 if (!request_region(ioaddr, AC_IO_EXTENT, dev->name)) 126 return -EBUSY; 127 128 if (inb_p(ioaddr + AC_ID_PORT) == 0xff) { 129 retval = -ENODEV; 130 goto out; 131 } 132 133 if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) { 134 retval = -ENODEV; 135 goto out; 136 } 137 138#ifndef final_version 139 printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x," 140 " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG), 141 inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1), 142 inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3)); 143#endif 144 145 printk("AC3200 in EISA slot %d, node", ioaddr/0x1000); 146 for(i = 0; i < 6; i++) 147 printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i)); 148 149 150 /* Allocate dev->priv and fill in 8390 specific dev fields. */ 151 if (ethdev_init(dev)) { 152 printk (", unable to allocate memory for dev->priv.\n"); 153 retval = -ENOMEM; 154 goto out; 155 } 156 157 /* Assign and allocate the interrupt now. */ 158 if (dev->irq == 0) { 159 dev->irq = config2irq(inb(ioaddr + AC_CONFIG)); 160 printk(", using"); 161 } else { 162 dev->irq = irq_cannonicalize(dev->irq); 163 printk(", assigning"); 164 } 165 166 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev); 167 if (retval) { 168 printk (" nothing! Unable to get IRQ %d.\n", dev->irq); 169 goto out1; 170 } 171 172 printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]); 173 174 dev->base_addr = ioaddr; 175 176#ifdef notyet 177 if (dev->mem_start) { /* Override the value from the board. */ 178 for (i = 0; i < 7; i++) 179 if (addrmap[i] == dev->mem_start) 180 break; 181 if (i >= 7) 182 i = 0; 183 outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG); 184 } 185#endif 186 187 dev->if_port = inb(ioaddr + AC_CONFIG) >> 6; 188 dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG)); 189 190 printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n", 191 dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start); 192 193 /* 194 * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put 195 * the card mem within the region covered by `normal' RAM !!! 196 */ 197 if (dev->mem_start > 1024*1024) { /* phys addr > 1MB */ 198 if (dev->mem_start < virt_to_bus(high_memory)) { 199 printk(KERN_CRIT "ac3200.c: Card RAM overlaps with normal memory!!!\n"); 200 printk(KERN_CRIT "ac3200.c: Use EISA SCU to set card memory below 1MB,\n"); 201 printk(KERN_CRIT "ac3200.c: or to an address above 0x%lx.\n", virt_to_bus(high_memory)); 202 printk(KERN_CRIT "ac3200.c: Driver NOT installed.\n"); 203 retval = -EINVAL; 204 goto out2; 205 } 206 dev->mem_start = (unsigned long)ioremap(dev->mem_start, AC_STOP_PG*0x100); 207 if (dev->mem_start == 0) { 208 printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n"); 209 printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n"); 210 printk(KERN_ERR "ac3200.c: Driver NOT installed.\n"); 211 retval = -EINVAL; 212 goto out2; 213 } 214 ei_status.reg0 = 1; /* Use as remap flag */ 215 printk("ac3200.c: remapped %dkB card memory to virtual address %#lx\n", 216 AC_STOP_PG/4, dev->mem_start); 217 } 218 219 dev->rmem_start = dev->mem_start + TX_PAGES*256; 220 dev->mem_end = dev->rmem_end = dev->mem_start 221 + (AC_STOP_PG - AC_START_PG)*256; 222 223 ei_status.name = "AC3200"; 224 ei_status.tx_start_page = AC_START_PG; 225 ei_status.rx_start_page = AC_START_PG + TX_PAGES; 226 ei_status.stop_page = AC_STOP_PG; 227 ei_status.word16 = 1; 228 229 if (ei_debug > 0) 230 printk(version); 231 232 ei_status.reset_8390 = &ac_reset_8390; 233 ei_status.block_input = &ac_block_input; 234 ei_status.block_output = &ac_block_output; 235 ei_status.get_8390_hdr = &ac_get_8390_hdr; 236 237 dev->open = &ac_open; 238 dev->stop = &ac_close_card; 239 NS8390_init(dev, 0); 240 return 0; 241out2: 242 free_irq(dev->irq, dev); 243out1: 244 kfree(dev->priv); 245 dev->priv = NULL; 246out: 247 release_region(ioaddr, AC_IO_EXTENT); 248 return retval; 249} 250 251static int ac_open(struct net_device *dev) 252{ 253#ifdef notyet 254 /* Someday we may enable the IRQ and shared memory here. */ 255 int ioaddr = dev->base_addr; 256#endif 257 258 ei_open(dev); 259 return 0; 260} 261 262static void ac_reset_8390(struct net_device *dev) 263{ 264 ushort ioaddr = dev->base_addr; 265 266 outb(AC_RESET, ioaddr + AC_RESET_PORT); 267 if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies); 268 269 ei_status.txing = 0; 270 outb(AC_ENABLE, ioaddr + AC_RESET_PORT); 271 if (ei_debug > 1) printk("reset done\n"); 272 273 return; 274} 275 276/* Grab the 8390 specific header. Similar to the block_input routine, but 277 we don't need to be concerned with ring wrap as the header will be at 278 the start of a page, so we optimize accordingly. */ 279 280static void 281ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) 282{ 283 unsigned long hdr_start = dev->mem_start + ((ring_page - AC_START_PG)<<8); 284 isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); 285} 286 287/* Block input and output are easy on shared memory ethercards, the only 288 complication is when the ring buffer wraps. */ 289 290static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb, 291 int ring_offset) 292{ 293 unsigned long xfer_start = dev->mem_start + ring_offset - (AC_START_PG<<8); 294 295 if (xfer_start + count > dev->rmem_end) { 296 /* We must wrap the input move. */ 297 int semi_count = dev->rmem_end - xfer_start; 298 isa_memcpy_fromio(skb->data, xfer_start, semi_count); 299 count -= semi_count; 300 isa_memcpy_fromio(skb->data + semi_count, dev->rmem_start, count); 301 } else { 302 /* Packet is in one chunk -- we can copy + cksum. */ 303 isa_eth_io_copy_and_sum(skb, xfer_start, count, 0); 304 } 305} 306 307static void ac_block_output(struct net_device *dev, int count, 308 const unsigned char *buf, int start_page) 309{ 310 unsigned long shmem = dev->mem_start + ((start_page - AC_START_PG)<<8); 311 312 isa_memcpy_toio(shmem, buf, count); 313} 314 315static int ac_close_card(struct net_device *dev) 316{ 317 if (ei_debug > 1) 318 printk("%s: Shutting down ethercard.\n", dev->name); 319 320#ifdef notyet 321 /* We should someday disable shared memory and interrupts. */ 322 outb(0x00, ioaddr + 6); /* Disable interrupts. */ 323 free_irq(dev->irq, dev); 324#endif 325 326 ei_close(dev); 327 return 0; 328} 329 330#ifdef MODULE 331#define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */ 332static struct net_device dev_ac32[MAX_AC32_CARDS]; 333static int io[MAX_AC32_CARDS]; 334static int irq[MAX_AC32_CARDS]; 335static int mem[MAX_AC32_CARDS]; 336MODULE_PARM(io, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i"); 337MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i"); 338MODULE_PARM(mem, "1-" __MODULE_STRING(MAX_AC32_CARDS) "i"); 339MODULE_PARM_DESC(io, "I/O base adress(es)"); 340MODULE_PARM_DESC(irq, "IRQ number(s)"); 341MODULE_PARM_DESC(mem, "Memory base address(es)"); 342MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver"); 343MODULE_LICENSE("GPL"); 344 345int 346init_module(void) 347{ 348 int this_dev, found = 0; 349 350 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) { 351 struct net_device *dev = &dev_ac32[this_dev]; 352 dev->irq = irq[this_dev]; 353 dev->base_addr = io[this_dev]; 354 dev->mem_start = mem[this_dev]; /* Currently ignored by driver */ 355 dev->init = ac3200_probe; 356 /* Default is to only install one card. */ 357 if (io[this_dev] == 0 && this_dev != 0) break; 358 if (register_netdev(dev) != 0) { 359 printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]); 360 if (found != 0) { /* Got at least one. */ 361 return 0; 362 } 363 return -ENXIO; 364 } 365 found++; 366 } 367 return 0; 368} 369 370void 371cleanup_module(void) 372{ 373 int this_dev; 374 375 for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) { 376 struct net_device *dev = &dev_ac32[this_dev]; 377 if (dev->priv != NULL) { 378 /* Someday free_irq may be in ac_close_card() */ 379 free_irq(dev->irq, dev); 380 release_region(dev->base_addr, AC_IO_EXTENT); 381 if (ei_status.reg0) 382 iounmap((void *)dev->mem_start); 383 unregister_netdev(dev); 384 kfree(dev->priv); 385 dev->priv = NULL; 386 } 387 } 388} 389#endif /* MODULE */ 390 391 392/* 393 * Local variables: 394 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c ac3200.c" 395 * version-control: t 396 * kept-new-versions: 5 397 * tab-width: 4 398 * End: 399 */ 400