Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 24 | static 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 | #include <linux/eisa.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/errno.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/netdevice.h> |
| 33 | #include <linux/etherdevice.h> |
| 34 | #include <linux/init.h> |
| 35 | |
| 36 | #include <asm/system.h> |
| 37 | #include <asm/io.h> |
| 38 | #include <asm/irq.h> |
| 39 | |
| 40 | #include "8390.h" |
| 41 | |
| 42 | #define DRV_NAME "ac3200" |
| 43 | |
| 44 | /* Offsets from the base address. */ |
| 45 | #define AC_NIC_BASE 0x00 |
| 46 | #define AC_SA_PROM 0x16 /* The station address PROM. */ |
| 47 | #define AC_ADDR0 0x00 /* Prefix station address values. */ |
| 48 | #define AC_ADDR1 0x40 |
| 49 | #define AC_ADDR2 0x90 |
| 50 | #define AC_ID_PORT 0xC80 |
| 51 | #define AC_EISA_ID 0x0110d305 |
| 52 | #define AC_RESET_PORT 0xC84 |
| 53 | #define AC_RESET 0x00 |
| 54 | #define AC_ENABLE 0x01 |
| 55 | #define AC_CONFIG 0xC90 /* The configuration port. */ |
| 56 | |
| 57 | #define AC_IO_EXTENT 0x20 |
| 58 | /* Actually accessed is: |
| 59 | * AC_NIC_BASE (0-15) |
| 60 | * AC_SA_PROM (0-5) |
| 61 | * AC_ID_PORT (0-3) |
| 62 | * AC_RESET_PORT |
| 63 | * AC_CONFIG |
| 64 | */ |
| 65 | |
| 66 | /* Decoding of the configuration register. */ |
| 67 | static unsigned char config2irqmap[8] __initdata = {15, 12, 11, 10, 9, 7, 5, 3}; |
| 68 | static int addrmap[8] = |
| 69 | {0xFF0000, 0xFE0000, 0xFD0000, 0xFFF0000, 0xFFE0000, 0xFFC0000, 0xD0000, 0 }; |
| 70 | static const char *port_name[4] = { "10baseT", "invalid", "AUI", "10base2"}; |
| 71 | |
| 72 | #define config2irq(configval) config2irqmap[((configval) >> 3) & 7] |
| 73 | #define config2mem(configval) addrmap[(configval) & 7] |
| 74 | #define config2name(configval) port_name[((configval) >> 6) & 3] |
| 75 | |
| 76 | /* First and last 8390 pages. */ |
| 77 | #define AC_START_PG 0x00 /* First page of 8390 TX buffer */ |
| 78 | #define AC_STOP_PG 0x80 /* Last page +1 of the 8390 RX ring */ |
| 79 | |
| 80 | static int ac_probe1(int ioaddr, struct net_device *dev); |
| 81 | |
| 82 | static int ac_open(struct net_device *dev); |
| 83 | static void ac_reset_8390(struct net_device *dev); |
| 84 | static void ac_block_input(struct net_device *dev, int count, |
| 85 | struct sk_buff *skb, int ring_offset); |
| 86 | static void ac_block_output(struct net_device *dev, const int count, |
| 87 | const unsigned char *buf, const int start_page); |
| 88 | static void ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, |
| 89 | int ring_page); |
| 90 | |
| 91 | static 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 | |
| 100 | static int __init do_ac3200_probe(struct net_device *dev) |
| 101 | { |
| 102 | unsigned short ioaddr = dev->base_addr; |
| 103 | int irq = dev->irq; |
| 104 | int mem_start = dev->mem_start; |
| 105 | |
| 106 | SET_MODULE_OWNER(dev); |
| 107 | |
| 108 | if (ioaddr > 0x1ff) /* Check a single specified location. */ |
| 109 | return ac_probe1(ioaddr, dev); |
| 110 | else if (ioaddr > 0) /* Don't probe at all. */ |
| 111 | return -ENXIO; |
| 112 | |
| 113 | if ( ! EISA_bus) |
| 114 | return -ENXIO; |
| 115 | |
| 116 | for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) { |
| 117 | if (ac_probe1(ioaddr, dev) == 0) |
| 118 | return 0; |
| 119 | dev->irq = irq; |
| 120 | dev->mem_start = mem_start; |
| 121 | } |
| 122 | |
| 123 | return -ENODEV; |
| 124 | } |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | #ifndef MODULE |
| 127 | struct net_device * __init ac3200_probe(int unit) |
| 128 | { |
| 129 | struct net_device *dev = alloc_ei_netdev(); |
| 130 | int err; |
| 131 | |
| 132 | if (!dev) |
| 133 | return ERR_PTR(-ENOMEM); |
| 134 | |
| 135 | sprintf(dev->name, "eth%d", unit); |
| 136 | netdev_boot_setup_check(dev); |
| 137 | |
| 138 | err = do_ac3200_probe(dev); |
| 139 | if (err) |
| 140 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | return dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | out: |
| 143 | free_netdev(dev); |
| 144 | return ERR_PTR(err); |
| 145 | } |
| 146 | #endif |
| 147 | |
| 148 | static int __init ac_probe1(int ioaddr, struct net_device *dev) |
| 149 | { |
| 150 | int i, retval; |
| 151 | |
| 152 | if (!request_region(ioaddr, AC_IO_EXTENT, DRV_NAME)) |
| 153 | return -EBUSY; |
| 154 | |
| 155 | if (inb_p(ioaddr + AC_ID_PORT) == 0xff) { |
| 156 | retval = -ENODEV; |
| 157 | goto out; |
| 158 | } |
| 159 | |
| 160 | if (inl(ioaddr + AC_ID_PORT) != AC_EISA_ID) { |
| 161 | retval = -ENODEV; |
| 162 | goto out; |
| 163 | } |
| 164 | |
| 165 | #ifndef final_version |
| 166 | printk(KERN_DEBUG "AC3200 ethercard configuration register is %#02x," |
| 167 | " EISA ID %02x %02x %02x %02x.\n", inb(ioaddr + AC_CONFIG), |
| 168 | inb(ioaddr + AC_ID_PORT + 0), inb(ioaddr + AC_ID_PORT + 1), |
| 169 | inb(ioaddr + AC_ID_PORT + 2), inb(ioaddr + AC_ID_PORT + 3)); |
| 170 | #endif |
| 171 | |
| 172 | printk("AC3200 in EISA slot %d, node", ioaddr/0x1000); |
| 173 | for(i = 0; i < 6; i++) |
| 174 | printk(" %02x", dev->dev_addr[i] = inb(ioaddr + AC_SA_PROM + i)); |
| 175 | |
| 176 | #if 0 |
| 177 | /* Check the vendor ID/prefix. Redundant after checking the EISA ID */ |
| 178 | if (inb(ioaddr + AC_SA_PROM + 0) != AC_ADDR0 |
| 179 | || inb(ioaddr + AC_SA_PROM + 1) != AC_ADDR1 |
| 180 | || inb(ioaddr + AC_SA_PROM + 2) != AC_ADDR2 ) { |
| 181 | printk(", not found (invalid prefix).\n"); |
| 182 | retval = -ENODEV; |
| 183 | goto out; |
| 184 | } |
| 185 | #endif |
| 186 | |
| 187 | /* Assign and allocate the interrupt now. */ |
| 188 | if (dev->irq == 0) { |
| 189 | dev->irq = config2irq(inb(ioaddr + AC_CONFIG)); |
| 190 | printk(", using"); |
| 191 | } else { |
| 192 | dev->irq = irq_canonicalize(dev->irq); |
| 193 | printk(", assigning"); |
| 194 | } |
| 195 | |
| 196 | retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev); |
| 197 | if (retval) { |
| 198 | printk (" nothing! Unable to get IRQ %d.\n", dev->irq); |
| 199 | goto out1; |
| 200 | } |
| 201 | |
| 202 | printk(" IRQ %d, %s port\n", dev->irq, port_name[dev->if_port]); |
| 203 | |
| 204 | dev->base_addr = ioaddr; |
| 205 | |
| 206 | #ifdef notyet |
| 207 | if (dev->mem_start) { /* Override the value from the board. */ |
| 208 | for (i = 0; i < 7; i++) |
| 209 | if (addrmap[i] == dev->mem_start) |
| 210 | break; |
| 211 | if (i >= 7) |
| 212 | i = 0; |
| 213 | outb((inb(ioaddr + AC_CONFIG) & ~7) | i, ioaddr + AC_CONFIG); |
| 214 | } |
| 215 | #endif |
| 216 | |
| 217 | dev->if_port = inb(ioaddr + AC_CONFIG) >> 6; |
| 218 | dev->mem_start = config2mem(inb(ioaddr + AC_CONFIG)); |
| 219 | |
| 220 | printk("%s: AC3200 at %#3x with %dkB memory at physical address %#lx.\n", |
| 221 | dev->name, ioaddr, AC_STOP_PG/4, dev->mem_start); |
| 222 | |
| 223 | /* |
| 224 | * BEWARE!! Some dain-bramaged EISA SCUs will allow you to put |
| 225 | * the card mem within the region covered by `normal' RAM !!! |
| 226 | * |
| 227 | * ioremap() will fail in that case. |
| 228 | */ |
| 229 | ei_status.mem = ioremap(dev->mem_start, AC_STOP_PG*0x100); |
| 230 | if (!ei_status.mem) { |
| 231 | printk(KERN_ERR "ac3200.c: Unable to remap card memory above 1MB !!\n"); |
| 232 | printk(KERN_ERR "ac3200.c: Try using EISA SCU to set memory below 1MB.\n"); |
| 233 | printk(KERN_ERR "ac3200.c: Driver NOT installed.\n"); |
| 234 | retval = -EINVAL; |
| 235 | goto out1; |
| 236 | } |
| 237 | printk("ac3200.c: remapped %dkB card memory to virtual address %p\n", |
| 238 | AC_STOP_PG/4, ei_status.mem); |
| 239 | |
| 240 | dev->mem_start = (unsigned long)ei_status.mem; |
| 241 | dev->mem_end = dev->mem_start + (AC_STOP_PG - AC_START_PG)*256; |
| 242 | |
| 243 | ei_status.name = "AC3200"; |
| 244 | ei_status.tx_start_page = AC_START_PG; |
| 245 | ei_status.rx_start_page = AC_START_PG + TX_PAGES; |
| 246 | ei_status.stop_page = AC_STOP_PG; |
| 247 | ei_status.word16 = 1; |
| 248 | |
| 249 | if (ei_debug > 0) |
| 250 | printk(version); |
| 251 | |
| 252 | ei_status.reset_8390 = &ac_reset_8390; |
| 253 | ei_status.block_input = &ac_block_input; |
| 254 | ei_status.block_output = &ac_block_output; |
| 255 | ei_status.get_8390_hdr = &ac_get_8390_hdr; |
| 256 | |
| 257 | dev->open = &ac_open; |
| 258 | dev->stop = &ac_close_card; |
| 259 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 260 | dev->poll_controller = ei_poll; |
| 261 | #endif |
| 262 | NS8390_init(dev, 0); |
| b1fc550 | 2005-05-12 20:11:55 -0400 | [diff] [blame] | 263 | |
| 264 | retval = register_netdev(dev); |
| 265 | if (retval) |
| 266 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | return 0; |
| b1fc550 | 2005-05-12 20:11:55 -0400 | [diff] [blame] | 268 | out2: |
| 269 | if (ei_status.reg0) |
viro@ftp.linux.org.uk | 5ac90037 | 2005-09-06 01:36:58 +0100 | [diff] [blame] | 270 | iounmap(ei_status.mem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | out1: |
| 272 | free_irq(dev->irq, dev); |
| 273 | out: |
| 274 | release_region(ioaddr, AC_IO_EXTENT); |
| 275 | return retval; |
| 276 | } |
| 277 | |
| 278 | static int ac_open(struct net_device *dev) |
| 279 | { |
| 280 | #ifdef notyet |
| 281 | /* Someday we may enable the IRQ and shared memory here. */ |
| 282 | int ioaddr = dev->base_addr; |
| 283 | #endif |
| 284 | |
| 285 | ei_open(dev); |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | static void ac_reset_8390(struct net_device *dev) |
| 290 | { |
| 291 | ushort ioaddr = dev->base_addr; |
| 292 | |
| 293 | outb(AC_RESET, ioaddr + AC_RESET_PORT); |
| 294 | if (ei_debug > 1) printk("resetting AC3200, t=%ld...", jiffies); |
| 295 | |
| 296 | ei_status.txing = 0; |
| 297 | outb(AC_ENABLE, ioaddr + AC_RESET_PORT); |
| 298 | if (ei_debug > 1) printk("reset done\n"); |
| 299 | |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | /* Grab the 8390 specific header. Similar to the block_input routine, but |
| 304 | we don't need to be concerned with ring wrap as the header will be at |
| 305 | the start of a page, so we optimize accordingly. */ |
| 306 | |
| 307 | static void |
| 308 | ac_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) |
| 309 | { |
| 310 | void __iomem *hdr_start = ei_status.mem + ((ring_page - AC_START_PG)<<8); |
| 311 | memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr)); |
| 312 | } |
| 313 | |
| 314 | /* Block input and output are easy on shared memory ethercards, the only |
| 315 | complication is when the ring buffer wraps. */ |
| 316 | |
| 317 | static void ac_block_input(struct net_device *dev, int count, struct sk_buff *skb, |
| 318 | int ring_offset) |
| 319 | { |
| 320 | void __iomem *start = ei_status.mem + ring_offset - AC_START_PG*256; |
| 321 | |
| 322 | if (ring_offset + count > AC_STOP_PG*256) { |
| 323 | /* We must wrap the input move. */ |
| 324 | int semi_count = AC_STOP_PG*256 - ring_offset; |
| 325 | memcpy_fromio(skb->data, start, semi_count); |
| 326 | count -= semi_count; |
| 327 | memcpy_fromio(skb->data + semi_count, |
| 328 | ei_status.mem + TX_PAGES*256, count); |
| 329 | } else { |
| 330 | /* Packet is in one chunk -- we can copy + cksum. */ |
| 331 | eth_io_copy_and_sum(skb, start, count, 0); |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | static void ac_block_output(struct net_device *dev, int count, |
| 336 | const unsigned char *buf, int start_page) |
| 337 | { |
| 338 | void __iomem *shmem = ei_status.mem + ((start_page - AC_START_PG)<<8); |
| 339 | |
| 340 | memcpy_toio(shmem, buf, count); |
| 341 | } |
| 342 | |
| 343 | static int ac_close_card(struct net_device *dev) |
| 344 | { |
| 345 | if (ei_debug > 1) |
| 346 | printk("%s: Shutting down ethercard.\n", dev->name); |
| 347 | |
| 348 | #ifdef notyet |
| 349 | /* We should someday disable shared memory and interrupts. */ |
| 350 | outb(0x00, ioaddr + 6); /* Disable interrupts. */ |
| 351 | free_irq(dev->irq, dev); |
| 352 | #endif |
| 353 | |
| 354 | ei_close(dev); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | #ifdef MODULE |
| 359 | #define MAX_AC32_CARDS 4 /* Max number of AC32 cards per module */ |
| 360 | static struct net_device *dev_ac32[MAX_AC32_CARDS]; |
| 361 | static int io[MAX_AC32_CARDS]; |
| 362 | static int irq[MAX_AC32_CARDS]; |
| 363 | static int mem[MAX_AC32_CARDS]; |
| 364 | module_param_array(io, int, NULL, 0); |
| 365 | module_param_array(irq, int, NULL, 0); |
| 366 | module_param_array(mem, int, NULL, 0); |
| 367 | MODULE_PARM_DESC(io, "I/O base address(es)"); |
| 368 | MODULE_PARM_DESC(irq, "IRQ number(s)"); |
| 369 | MODULE_PARM_DESC(mem, "Memory base address(es)"); |
| 370 | MODULE_DESCRIPTION("Ansel AC3200 EISA ethernet driver"); |
| 371 | MODULE_LICENSE("GPL"); |
| 372 | |
| 373 | int |
| 374 | init_module(void) |
| 375 | { |
| 376 | struct net_device *dev; |
| 377 | int this_dev, found = 0; |
| 378 | |
| 379 | for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) { |
| 380 | if (io[this_dev] == 0 && this_dev != 0) |
| 381 | break; |
| 382 | dev = alloc_ei_netdev(); |
| 383 | if (!dev) |
| 384 | break; |
| 385 | dev->irq = irq[this_dev]; |
| 386 | dev->base_addr = io[this_dev]; |
| 387 | dev->mem_start = mem[this_dev]; /* Currently ignored by driver */ |
| 388 | if (do_ac3200_probe(dev) == 0) { |
| b1fc550 | 2005-05-12 20:11:55 -0400 | [diff] [blame] | 389 | dev_ac32[found++] = dev; |
| 390 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | } |
| 392 | free_netdev(dev); |
| 393 | printk(KERN_WARNING "ac3200.c: No ac3200 card found (i/o = 0x%x).\n", io[this_dev]); |
| 394 | break; |
| 395 | } |
| 396 | if (found) |
| 397 | return 0; |
| 398 | return -ENXIO; |
| 399 | } |
| 400 | |
Denis Vlasenko | 64916f1 | 2006-01-05 22:45:47 -0800 | [diff] [blame] | 401 | static void cleanup_card(struct net_device *dev) |
| 402 | { |
| 403 | /* Someday free_irq may be in ac_close_card() */ |
| 404 | free_irq(dev->irq, dev); |
| 405 | release_region(dev->base_addr, AC_IO_EXTENT); |
| 406 | iounmap(ei_status.mem); |
| 407 | } |
| 408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | void |
| 410 | cleanup_module(void) |
| 411 | { |
| 412 | int this_dev; |
| 413 | |
| 414 | for (this_dev = 0; this_dev < MAX_AC32_CARDS; this_dev++) { |
| 415 | struct net_device *dev = dev_ac32[this_dev]; |
| 416 | if (dev) { |
| 417 | unregister_netdev(dev); |
| 418 | cleanup_card(dev); |
| 419 | free_netdev(dev); |
| 420 | } |
| 421 | } |
| 422 | } |
| 423 | #endif /* MODULE */ |