Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/acorn/net/ether3.c |
| 3 | * |
| 4 | * Copyright (C) 1995-2000 Russell King |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card |
| 11 | * for Acorn machines |
| 12 | * |
| 13 | * By Russell King, with some suggestions from borris@ant.co.uk |
| 14 | * |
| 15 | * Changelog: |
| 16 | * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet |
| 17 | * address up to the higher levels - they're |
| 18 | * silently ignored. I/F can now be put into |
| 19 | * multicast mode. Receiver routine optimised. |
| 20 | * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of |
| 21 | * the kernel rather than when a module. |
| 22 | * 1.06 RMK 02/03/1996 Various code cleanups |
| 23 | * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit |
| 24 | * routines. |
| 25 | * 1.08 RMK 14/10/1996 Fixed problem with too many packets, |
| 26 | * prevented the kernel message about dropped |
| 27 | * packets appearing too many times a second. |
| 28 | * Now does not disable all IRQs, only the IRQ |
| 29 | * used by this card. |
| 30 | * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low, |
| 31 | * but we still service the TX queue if we get a |
| 32 | * RX interrupt. |
| 33 | * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004. |
| 34 | * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A. |
| 35 | * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1. |
| 36 | * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h. |
| 37 | * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets. |
| 38 | * Chip seems to have a bug in, whereby if the |
| 39 | * packet starts two bytes from the end of the |
| 40 | * buffer, it corrupts the receiver chain, and |
| 41 | * never updates the transmit status correctly. |
| 42 | * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing. |
| 43 | * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy |
| 44 | * hardware. |
| 45 | * 1.16 RMK 10/02/2000 Updated for 2.3.43 |
| 46 | * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8 |
| 47 | */ |
| 48 | |
| 49 | #include <linux/module.h> |
| 50 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <linux/types.h> |
| 52 | #include <linux/fcntl.h> |
| 53 | #include <linux/interrupt.h> |
| 54 | #include <linux/ptrace.h> |
| 55 | #include <linux/ioport.h> |
| 56 | #include <linux/in.h> |
| 57 | #include <linux/slab.h> |
| 58 | #include <linux/string.h> |
| 59 | #include <linux/errno.h> |
| 60 | #include <linux/netdevice.h> |
| 61 | #include <linux/etherdevice.h> |
| 62 | #include <linux/skbuff.h> |
| 63 | #include <linux/device.h> |
| 64 | #include <linux/init.h> |
| 65 | #include <linux/delay.h> |
| 66 | #include <linux/bitops.h> |
| 67 | |
| 68 | #include <asm/system.h> |
| 69 | #include <asm/ecard.h> |
| 70 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; |
| 73 | |
| 74 | #include "ether3.h" |
| 75 | |
| 76 | static unsigned int net_debug = NET_DEBUG; |
| 77 | |
| 78 | static void ether3_setmulticastlist(struct net_device *dev); |
| 79 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt); |
| 80 | static void ether3_tx(struct net_device *dev); |
| 81 | static int ether3_open (struct net_device *dev); |
| 82 | static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 83 | static irqreturn_t ether3_interrupt (int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | static int ether3_close (struct net_device *dev); |
| 85 | static struct net_device_stats *ether3_getstats (struct net_device *dev); |
| 86 | static void ether3_setmulticastlist (struct net_device *dev); |
| 87 | static void ether3_timeout(struct net_device *dev); |
| 88 | |
| 89 | #define BUS_16 2 |
| 90 | #define BUS_8 1 |
| 91 | #define BUS_UNKNOWN 0 |
| 92 | |
| 93 | /* --------------------------------------------------------------------------- */ |
| 94 | |
| 95 | typedef enum { |
| 96 | buffer_write, |
| 97 | buffer_read |
| 98 | } buffer_rw_t; |
| 99 | |
| 100 | /* |
| 101 | * ether3 read/write. Slow things down a bit... |
| 102 | * The SEEQ8005 doesn't like us writing to its registers |
| 103 | * too quickly. |
| 104 | */ |
| 105 | static inline void ether3_outb(int v, const void __iomem *r) |
| 106 | { |
| 107 | writeb(v, r); |
| 108 | udelay(1); |
| 109 | } |
| 110 | |
| 111 | static inline void ether3_outw(int v, const void __iomem *r) |
| 112 | { |
| 113 | writew(v, r); |
| 114 | udelay(1); |
| 115 | } |
| 116 | #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) |
| 117 | #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) |
| 118 | |
| 119 | static int |
| 120 | ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) |
| 121 | { |
| 122 | int timeout = 1000; |
| 123 | |
| 124 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
| 125 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); |
| 126 | |
| 127 | while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { |
| 128 | if (!timeout--) { |
| 129 | printk("%s: setbuffer broken\n", dev->name); |
| 130 | priv(dev)->broken = 1; |
| 131 | return 1; |
| 132 | } |
| 133 | udelay(1); |
| 134 | } |
| 135 | |
| 136 | if (read == buffer_read) { |
| 137 | ether3_outw(start, REG_DMAADDR); |
| 138 | ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); |
| 139 | } else { |
| 140 | ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); |
| 141 | ether3_outw(start, REG_DMAADDR); |
| 142 | } |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * write data to the buffer memory |
| 148 | */ |
| 149 | #define ether3_writebuffer(dev,data,length) \ |
| 150 | writesw(REG_BUFWIN, (data), (length) >> 1) |
| 151 | |
| 152 | #define ether3_writeword(dev,data) \ |
| 153 | writew((data), REG_BUFWIN) |
| 154 | |
| 155 | #define ether3_writelong(dev,data) { \ |
| 156 | void __iomem *reg_bufwin = REG_BUFWIN; \ |
| 157 | writew((data), reg_bufwin); \ |
| 158 | writew((data) >> 16, reg_bufwin); \ |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * read data from the buffer memory |
| 163 | */ |
| 164 | #define ether3_readbuffer(dev,data,length) \ |
| 165 | readsw(REG_BUFWIN, (data), (length) >> 1) |
| 166 | |
| 167 | #define ether3_readword(dev) \ |
| 168 | readw(REG_BUFWIN) |
| 169 | |
| 170 | #define ether3_readlong(dev) \ |
| 171 | readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) |
| 172 | |
| 173 | /* |
| 174 | * Switch LED off... |
| 175 | */ |
| 176 | static void ether3_ledoff(unsigned long data) |
| 177 | { |
| 178 | struct net_device *dev = (struct net_device *)data; |
| 179 | ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * switch LED on... |
| 184 | */ |
| 185 | static inline void ether3_ledon(struct net_device *dev) |
| 186 | { |
| 187 | del_timer(&priv(dev)->timer); |
| 188 | priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ |
| 189 | priv(dev)->timer.data = (unsigned long)dev; |
| 190 | priv(dev)->timer.function = ether3_ledoff; |
| 191 | add_timer(&priv(dev)->timer); |
| 192 | if (priv(dev)->regs.config2 & CFG2_CTRLO) |
| 193 | ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); |
| 194 | } |
| 195 | |
| 196 | /* |
| 197 | * Read the ethernet address string from the on board rom. |
| 198 | * This is an ascii string!!! |
| 199 | */ |
Al Viro | bffa215 | 2006-06-15 14:23:19 -0400 | [diff] [blame] | 200 | static int __devinit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | ether3_addr(char *addr, struct expansion_card *ec) |
| 202 | { |
| 203 | struct in_chunk_dir cd; |
| 204 | char *s; |
| 205 | |
| 206 | if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { |
| 207 | int i; |
| 208 | for (i = 0; i<6; i++) { |
| 209 | addr[i] = simple_strtoul(s + 1, &s, 0x10); |
| 210 | if (*s != (i==5?')' : ':' )) |
| 211 | break; |
| 212 | } |
| 213 | if (i == 6) |
| 214 | return 0; |
| 215 | } |
| 216 | /* I wonder if we should even let the user continue in this case |
| 217 | * - no, it would be better to disable the device |
| 218 | */ |
| 219 | printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); |
| 220 | return -ENODEV; |
| 221 | } |
| 222 | |
| 223 | /* --------------------------------------------------------------------------- */ |
| 224 | |
Al Viro | bffa215 | 2006-06-15 14:23:19 -0400 | [diff] [blame] | 225 | static int __devinit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | ether3_ramtest(struct net_device *dev, unsigned char byte) |
| 227 | { |
| 228 | unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); |
| 229 | int i,ret = 0; |
| 230 | int max_errors = 4; |
| 231 | int bad = -1; |
| 232 | |
| 233 | if (!buffer) |
| 234 | return 1; |
| 235 | |
| 236 | memset(buffer, byte, RX_END); |
| 237 | ether3_setbuffer(dev, buffer_write, 0); |
| 238 | ether3_writebuffer(dev, buffer, TX_END); |
| 239 | ether3_setbuffer(dev, buffer_write, RX_START); |
| 240 | ether3_writebuffer(dev, buffer + RX_START, RX_LEN); |
| 241 | memset(buffer, byte ^ 0xff, RX_END); |
| 242 | ether3_setbuffer(dev, buffer_read, 0); |
| 243 | ether3_readbuffer(dev, buffer, TX_END); |
| 244 | ether3_setbuffer(dev, buffer_read, RX_START); |
| 245 | ether3_readbuffer(dev, buffer + RX_START, RX_LEN); |
| 246 | |
| 247 | for (i = 0; i < RX_END; i++) { |
| 248 | if (buffer[i] != byte) { |
| 249 | if (max_errors > 0 && bad != buffer[i]) { |
| 250 | printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", |
| 251 | dev->name, buffer[i], byte, i); |
| 252 | ret = 2; |
| 253 | max_errors--; |
| 254 | bad = i; |
| 255 | } |
| 256 | } else { |
| 257 | if (bad != -1) { |
| 258 | if (bad != i - 1) |
| 259 | printk(" - 0x%04X\n", i - 1); |
| 260 | printk("\n"); |
| 261 | bad = -1; |
| 262 | } |
| 263 | } |
| 264 | } |
| 265 | if (bad != -1) |
| 266 | printk(" - 0xffff\n"); |
| 267 | kfree(buffer); |
| 268 | |
| 269 | return ret; |
| 270 | } |
| 271 | |
| 272 | /* ------------------------------------------------------------------------------- */ |
| 273 | |
Al Viro | bffa215 | 2006-06-15 14:23:19 -0400 | [diff] [blame] | 274 | static int __devinit ether3_init_2(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | { |
| 276 | int i; |
| 277 | |
| 278 | priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; |
| 279 | priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; |
| 280 | priv(dev)->regs.command = 0; |
| 281 | |
| 282 | /* |
| 283 | * Set up our hardware address |
| 284 | */ |
| 285 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); |
| 286 | for (i = 0; i < 6; i++) |
| 287 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); |
| 288 | |
| 289 | if (dev->flags & IFF_PROMISC) |
| 290 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; |
| 291 | else if (dev->flags & IFF_MULTICAST) |
| 292 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; |
| 293 | else |
| 294 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; |
| 295 | |
| 296 | /* |
| 297 | * There is a problem with the NQ8005 in that it occasionally loses the |
| 298 | * last two bytes. To get round this problem, we receive the CRC as |
| 299 | * well. That way, if we do lose the last two, then it doesn't matter. |
| 300 | */ |
| 301 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); |
| 302 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); |
| 303 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); |
| 304 | ether3_outw(0, REG_TRANSMITPTR); |
| 305 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); |
| 306 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
| 307 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
| 308 | ether3_outw(priv(dev)->regs.command, REG_COMMAND); |
| 309 | |
| 310 | i = ether3_ramtest(dev, 0x5A); |
| 311 | if(i) |
| 312 | return i; |
| 313 | i = ether3_ramtest(dev, 0x1E); |
| 314 | if(i) |
| 315 | return i; |
| 316 | |
| 317 | ether3_setbuffer(dev, buffer_write, 0); |
| 318 | ether3_writelong(dev, 0); |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static void |
| 323 | ether3_init_for_open(struct net_device *dev) |
| 324 | { |
| 325 | int i; |
| 326 | |
| 327 | memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats)); |
| 328 | |
| 329 | /* Reset the chip */ |
| 330 | ether3_outw(CFG2_RESET, REG_CONFIG2); |
| 331 | udelay(4); |
| 332 | |
| 333 | priv(dev)->regs.command = 0; |
| 334 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); |
| 335 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) |
| 336 | barrier(); |
| 337 | |
| 338 | ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); |
| 339 | for (i = 0; i < 6; i++) |
| 340 | ether3_outb(dev->dev_addr[i], REG_BUFWIN); |
| 341 | |
| 342 | priv(dev)->tx_head = 0; |
| 343 | priv(dev)->tx_tail = 0; |
| 344 | priv(dev)->regs.config2 |= CFG2_CTRLO; |
| 345 | priv(dev)->rx_head = RX_START; |
| 346 | |
| 347 | ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); |
| 348 | ether3_outw((TX_END>>8) - 1, REG_BUFWIN); |
| 349 | ether3_outw(priv(dev)->rx_head, REG_RECVPTR); |
| 350 | ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); |
| 351 | ether3_outw(0, REG_TRANSMITPTR); |
| 352 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
| 353 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
| 354 | |
| 355 | ether3_setbuffer(dev, buffer_write, 0); |
| 356 | ether3_writelong(dev, 0); |
| 357 | |
| 358 | priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; |
| 359 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); |
| 360 | } |
| 361 | |
| 362 | static inline int |
| 363 | ether3_probe_bus_8(struct net_device *dev, int val) |
| 364 | { |
| 365 | int write_low, write_high, read_low, read_high; |
| 366 | |
| 367 | write_low = val & 255; |
| 368 | write_high = val >> 8; |
| 369 | |
| 370 | printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); |
| 371 | |
| 372 | ether3_outb(write_low, REG_RECVPTR); |
| 373 | ether3_outb(write_high, REG_RECVPTR + 4); |
| 374 | |
| 375 | read_low = ether3_inb(REG_RECVPTR); |
| 376 | read_high = ether3_inb(REG_RECVPTR + 4); |
| 377 | |
| 378 | printk(", read8 [%02X:%02X]\n", read_high, read_low); |
| 379 | |
| 380 | return read_low == write_low && read_high == write_high; |
| 381 | } |
| 382 | |
| 383 | static inline int |
| 384 | ether3_probe_bus_16(struct net_device *dev, int val) |
| 385 | { |
| 386 | int read_val; |
| 387 | |
| 388 | ether3_outw(val, REG_RECVPTR); |
| 389 | read_val = ether3_inw(REG_RECVPTR); |
| 390 | |
| 391 | printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); |
| 392 | |
| 393 | return read_val == val; |
| 394 | } |
| 395 | |
| 396 | /* |
| 397 | * Open/initialize the board. This is called (in the current kernel) |
| 398 | * sometime after booting when the 'ifconfig' program is run. |
| 399 | * |
| 400 | * This routine should set everything up anew at each open, even |
| 401 | * registers that "should" only need to be set once at boot, so that |
| 402 | * there is non-reboot way to recover if something goes wrong. |
| 403 | */ |
| 404 | static int |
| 405 | ether3_open(struct net_device *dev) |
| 406 | { |
| 407 | if (!is_valid_ether_addr(dev->dev_addr)) { |
| 408 | printk(KERN_WARNING "%s: invalid ethernet MAC address\n", |
| 409 | dev->name); |
| 410 | return -EINVAL; |
| 411 | } |
| 412 | |
| 413 | if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) |
| 414 | return -EAGAIN; |
| 415 | |
| 416 | ether3_init_for_open(dev); |
| 417 | |
| 418 | netif_start_queue(dev); |
| 419 | |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | /* |
| 424 | * The inverse routine to ether3_open(). |
| 425 | */ |
| 426 | static int |
| 427 | ether3_close(struct net_device *dev) |
| 428 | { |
| 429 | netif_stop_queue(dev); |
| 430 | |
| 431 | disable_irq(dev->irq); |
| 432 | |
| 433 | ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); |
| 434 | priv(dev)->regs.command = 0; |
| 435 | while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) |
| 436 | barrier(); |
| 437 | ether3_outb(0x80, REG_CONFIG2 + 4); |
| 438 | ether3_outw(0, REG_COMMAND); |
| 439 | |
| 440 | free_irq(dev->irq, dev); |
| 441 | |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Get the current statistics. This may be called with the card open or |
| 447 | * closed. |
| 448 | */ |
| 449 | static struct net_device_stats *ether3_getstats(struct net_device *dev) |
| 450 | { |
| 451 | return &priv(dev)->stats; |
| 452 | } |
| 453 | |
| 454 | /* |
| 455 | * Set or clear promiscuous/multicast mode filter for this adaptor. |
| 456 | * |
| 457 | * We don't attempt any packet filtering. The card may have a SEEQ 8004 |
| 458 | * in which does not have the other ethernet address registers present... |
| 459 | */ |
| 460 | static void ether3_setmulticastlist(struct net_device *dev) |
| 461 | { |
| 462 | priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; |
| 463 | |
| 464 | if (dev->flags & IFF_PROMISC) { |
| 465 | /* promiscuous mode */ |
| 466 | priv(dev)->regs.config1 |= CFG1_RECVPROMISC; |
| 467 | } else if (dev->flags & IFF_ALLMULTI) { |
| 468 | priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; |
| 469 | } else |
| 470 | priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; |
| 471 | |
| 472 | ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); |
| 473 | } |
| 474 | |
| 475 | static void ether3_timeout(struct net_device *dev) |
| 476 | { |
| 477 | unsigned long flags; |
| 478 | |
| 479 | del_timer(&priv(dev)->timer); |
| 480 | |
| 481 | local_irq_save(flags); |
| 482 | printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); |
| 483 | printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, |
| 484 | ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); |
| 485 | printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, |
| 486 | ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); |
| 487 | printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, |
| 488 | priv(dev)->tx_head, priv(dev)->tx_tail); |
| 489 | ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); |
| 490 | printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); |
| 491 | local_irq_restore(flags); |
| 492 | |
| 493 | priv(dev)->regs.config2 |= CFG2_CTRLO; |
| 494 | priv(dev)->stats.tx_errors += 1; |
| 495 | ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); |
| 496 | priv(dev)->tx_head = priv(dev)->tx_tail = 0; |
| 497 | |
| 498 | netif_wake_queue(dev); |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * Transmit a packet |
| 503 | */ |
| 504 | static int |
| 505 | ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) |
| 506 | { |
| 507 | unsigned long flags; |
| 508 | unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; |
| 509 | unsigned int ptr, next_ptr; |
| 510 | |
| 511 | if (priv(dev)->broken) { |
| 512 | dev_kfree_skb(skb); |
| 513 | priv(dev)->stats.tx_dropped ++; |
| 514 | netif_start_queue(dev); |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | length = (length + 1) & ~1; |
| 519 | if (length != skb->len) { |
Herbert Xu | 5b057c6 | 2006-06-23 02:06:41 -0700 | [diff] [blame] | 520 | if (skb_padto(skb, length)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | goto out; |
| 522 | } |
| 523 | |
| 524 | next_ptr = (priv(dev)->tx_head + 1) & 15; |
| 525 | |
| 526 | local_irq_save(flags); |
| 527 | |
| 528 | if (priv(dev)->tx_tail == next_ptr) { |
| 529 | local_irq_restore(flags); |
| 530 | return 1; /* unable to queue */ |
| 531 | } |
| 532 | |
| 533 | dev->trans_start = jiffies; |
| 534 | ptr = 0x600 * priv(dev)->tx_head; |
| 535 | priv(dev)->tx_head = next_ptr; |
| 536 | next_ptr *= 0x600; |
| 537 | |
| 538 | #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) |
| 539 | |
| 540 | ether3_setbuffer(dev, buffer_write, next_ptr); |
| 541 | ether3_writelong(dev, 0); |
| 542 | ether3_setbuffer(dev, buffer_write, ptr); |
| 543 | ether3_writelong(dev, 0); |
| 544 | ether3_writebuffer(dev, skb->data, length); |
| 545 | ether3_writeword(dev, htons(next_ptr)); |
| 546 | ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); |
| 547 | ether3_setbuffer(dev, buffer_write, ptr); |
| 548 | ether3_writeword(dev, htons((ptr + length + 4))); |
| 549 | ether3_writeword(dev, TXHDR_FLAGS >> 16); |
| 550 | ether3_ledon(dev); |
| 551 | |
| 552 | if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { |
| 553 | ether3_outw(ptr, REG_TRANSMITPTR); |
| 554 | ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); |
| 555 | } |
| 556 | |
| 557 | next_ptr = (priv(dev)->tx_head + 1) & 15; |
| 558 | local_irq_restore(flags); |
| 559 | |
| 560 | dev_kfree_skb(skb); |
| 561 | |
| 562 | if (priv(dev)->tx_tail == next_ptr) |
| 563 | netif_stop_queue(dev); |
| 564 | |
| 565 | out: |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 570 | ether3_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | { |
| 572 | struct net_device *dev = (struct net_device *)dev_id; |
| 573 | unsigned int status, handled = IRQ_NONE; |
| 574 | |
| 575 | #if NET_DEBUG > 1 |
| 576 | if(net_debug & DEBUG_INT) |
| 577 | printk("eth3irq: %d ", irq); |
| 578 | #endif |
| 579 | |
| 580 | status = ether3_inw(REG_STATUS); |
| 581 | |
| 582 | if (status & STAT_INTRX) { |
| 583 | ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); |
| 584 | ether3_rx(dev, 12); |
| 585 | handled = IRQ_HANDLED; |
| 586 | } |
| 587 | |
| 588 | if (status & STAT_INTTX) { |
| 589 | ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); |
| 590 | ether3_tx(dev); |
| 591 | handled = IRQ_HANDLED; |
| 592 | } |
| 593 | |
| 594 | #if NET_DEBUG > 1 |
| 595 | if(net_debug & DEBUG_INT) |
| 596 | printk("done\n"); |
| 597 | #endif |
| 598 | return handled; |
| 599 | } |
| 600 | |
| 601 | /* |
| 602 | * If we have a good packet(s), get it/them out of the buffers. |
| 603 | */ |
| 604 | static int ether3_rx(struct net_device *dev, unsigned int maxcnt) |
| 605 | { |
| 606 | unsigned int next_ptr = priv(dev)->rx_head, received = 0; |
| 607 | |
| 608 | ether3_ledon(dev); |
| 609 | |
| 610 | do { |
| 611 | unsigned int this_ptr, status; |
| 612 | unsigned char addrs[16]; |
| 613 | |
| 614 | /* |
| 615 | * read the first 16 bytes from the buffer. |
| 616 | * This contains the status bytes etc and ethernet addresses, |
| 617 | * and we also check the source ethernet address to see if |
| 618 | * it originated from us. |
| 619 | */ |
| 620 | { |
| 621 | unsigned int temp_ptr; |
| 622 | ether3_setbuffer(dev, buffer_read, next_ptr); |
| 623 | temp_ptr = ether3_readword(dev); |
| 624 | status = ether3_readword(dev); |
| 625 | if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != |
| 626 | (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) |
| 627 | break; |
| 628 | |
| 629 | this_ptr = next_ptr + 4; |
| 630 | next_ptr = ntohs(temp_ptr); |
| 631 | } |
| 632 | ether3_setbuffer(dev, buffer_read, this_ptr); |
| 633 | ether3_readbuffer(dev, addrs+2, 12); |
| 634 | |
| 635 | if (next_ptr < RX_START || next_ptr >= RX_END) { |
| 636 | int i; |
| 637 | printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); |
| 638 | printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); |
| 639 | for (i = 2; i < 14; i++) |
| 640 | printk("%02X ", addrs[i]); |
| 641 | printk("\n"); |
| 642 | next_ptr = priv(dev)->rx_head; |
| 643 | break; |
| 644 | } |
| 645 | /* |
| 646 | * ignore our own packets... |
| 647 | */ |
| 648 | if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && |
| 649 | !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { |
| 650 | maxcnt ++; /* compensate for loopedback packet */ |
| 651 | ether3_outw(next_ptr >> 8, REG_RECVEND); |
| 652 | } else |
| 653 | if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { |
| 654 | unsigned int length = next_ptr - this_ptr; |
| 655 | struct sk_buff *skb; |
| 656 | |
| 657 | if (next_ptr <= this_ptr) |
| 658 | length += RX_END - RX_START; |
| 659 | |
| 660 | skb = dev_alloc_skb(length + 2); |
| 661 | if (skb) { |
| 662 | unsigned char *buf; |
| 663 | |
| 664 | skb->dev = dev; |
| 665 | skb_reserve(skb, 2); |
| 666 | buf = skb_put(skb, length); |
| 667 | ether3_readbuffer(dev, buf + 12, length - 12); |
| 668 | ether3_outw(next_ptr >> 8, REG_RECVEND); |
| 669 | *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); |
| 670 | *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); |
| 671 | *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); |
| 672 | *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); |
| 673 | skb->protocol = eth_type_trans(skb, dev); |
| 674 | netif_rx(skb); |
| 675 | received ++; |
| 676 | } else |
| 677 | goto dropping; |
| 678 | } else { |
| 679 | struct net_device_stats *stats = &priv(dev)->stats; |
| 680 | ether3_outw(next_ptr >> 8, REG_RECVEND); |
| 681 | if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; |
| 682 | if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; |
| 683 | if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; |
| 684 | if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; |
| 685 | stats->rx_errors++; |
| 686 | } |
| 687 | } |
| 688 | while (-- maxcnt); |
| 689 | |
| 690 | done: |
| 691 | priv(dev)->stats.rx_packets += received; |
| 692 | priv(dev)->rx_head = next_ptr; |
| 693 | /* |
| 694 | * If rx went off line, then that means that the buffer may be full. We |
| 695 | * have dropped at least one packet. |
| 696 | */ |
| 697 | if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { |
| 698 | priv(dev)->stats.rx_dropped ++; |
| 699 | ether3_outw(next_ptr, REG_RECVPTR); |
| 700 | ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); |
| 701 | } |
| 702 | |
| 703 | return maxcnt; |
| 704 | |
| 705 | dropping:{ |
| 706 | static unsigned long last_warned; |
| 707 | |
| 708 | ether3_outw(next_ptr >> 8, REG_RECVEND); |
| 709 | /* |
| 710 | * Don't print this message too many times... |
| 711 | */ |
| 712 | if (time_after(jiffies, last_warned + 10 * HZ)) { |
| 713 | last_warned = jiffies; |
| 714 | printk("%s: memory squeeze, dropping packet.\n", dev->name); |
| 715 | } |
| 716 | priv(dev)->stats.rx_dropped ++; |
| 717 | goto done; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | /* |
| 722 | * Update stats for the transmitted packet(s) |
| 723 | */ |
| 724 | static void ether3_tx(struct net_device *dev) |
| 725 | { |
| 726 | unsigned int tx_tail = priv(dev)->tx_tail; |
| 727 | int max_work = 14; |
| 728 | |
| 729 | do { |
| 730 | unsigned long status; |
| 731 | |
| 732 | /* |
| 733 | * Read the packet header |
| 734 | */ |
| 735 | ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); |
| 736 | status = ether3_readlong(dev); |
| 737 | |
| 738 | /* |
| 739 | * Check to see if this packet has been transmitted |
| 740 | */ |
| 741 | if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != |
| 742 | (TXSTAT_DONE | TXHDR_TRANSMIT)) |
| 743 | break; |
| 744 | |
| 745 | /* |
| 746 | * Update errors |
| 747 | */ |
| 748 | if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) |
| 749 | priv(dev)->stats.tx_packets++; |
| 750 | else { |
| 751 | priv(dev)->stats.tx_errors ++; |
| 752 | if (status & TXSTAT_16COLLISIONS) |
| 753 | priv(dev)->stats.collisions += 16; |
| 754 | if (status & TXSTAT_BABBLED) |
| 755 | priv(dev)->stats.tx_fifo_errors ++; |
| 756 | } |
| 757 | |
| 758 | tx_tail = (tx_tail + 1) & 15; |
| 759 | } while (--max_work); |
| 760 | |
| 761 | if (priv(dev)->tx_tail != tx_tail) { |
| 762 | priv(dev)->tx_tail = tx_tail; |
| 763 | netif_wake_queue(dev); |
| 764 | } |
| 765 | } |
| 766 | |
Al Viro | bffa215 | 2006-06-15 14:23:19 -0400 | [diff] [blame] | 767 | static void __devinit ether3_banner(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | { |
| 769 | static unsigned version_printed = 0; |
| 770 | |
| 771 | if (net_debug && version_printed++ == 0) |
| 772 | printk(KERN_INFO "%s", version); |
| 773 | } |
| 774 | |
| 775 | static int __devinit |
| 776 | ether3_probe(struct expansion_card *ec, const struct ecard_id *id) |
| 777 | { |
| 778 | const struct ether3_data *data = id->data; |
| 779 | struct net_device *dev; |
| 780 | int i, bus_type, ret; |
| 781 | |
| 782 | ether3_banner(); |
| 783 | |
| 784 | ret = ecard_request_resources(ec); |
| 785 | if (ret) |
| 786 | goto out; |
| 787 | |
| 788 | dev = alloc_etherdev(sizeof(struct dev_priv)); |
| 789 | if (!dev) { |
| 790 | ret = -ENOMEM; |
| 791 | goto release; |
| 792 | } |
| 793 | |
| 794 | SET_MODULE_OWNER(dev); |
| 795 | SET_NETDEV_DEV(dev, &ec->dev); |
| 796 | |
| 797 | priv(dev)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), |
| 798 | ecard_resource_len(ec, ECARD_RES_MEMC)); |
| 799 | if (!priv(dev)->base) { |
| 800 | ret = -ENOMEM; |
| 801 | goto free; |
| 802 | } |
| 803 | |
| 804 | ec->irqaddr = priv(dev)->base + data->base_offset; |
| 805 | ec->irqmask = 0xf0; |
| 806 | |
| 807 | priv(dev)->seeq = priv(dev)->base + data->base_offset; |
| 808 | dev->irq = ec->irq; |
| 809 | |
| 810 | ether3_addr(dev->dev_addr, ec); |
| 811 | |
| 812 | init_timer(&priv(dev)->timer); |
| 813 | |
| 814 | /* Reset card... |
| 815 | */ |
| 816 | ether3_outb(0x80, REG_CONFIG2 + 4); |
| 817 | bus_type = BUS_UNKNOWN; |
| 818 | udelay(4); |
| 819 | |
| 820 | /* Test using Receive Pointer (16-bit register) to find out |
| 821 | * how the ether3 is connected to the bus... |
| 822 | */ |
| 823 | if (ether3_probe_bus_8(dev, 0x100) && |
| 824 | ether3_probe_bus_8(dev, 0x201)) |
| 825 | bus_type = BUS_8; |
| 826 | |
| 827 | if (bus_type == BUS_UNKNOWN && |
| 828 | ether3_probe_bus_16(dev, 0x101) && |
| 829 | ether3_probe_bus_16(dev, 0x201)) |
| 830 | bus_type = BUS_16; |
| 831 | |
| 832 | switch (bus_type) { |
| 833 | case BUS_UNKNOWN: |
| 834 | printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); |
| 835 | ret = -ENODEV; |
| 836 | goto free; |
| 837 | |
| 838 | case BUS_8: |
| 839 | printk(KERN_ERR "%s: %s found, but is an unsupported " |
| 840 | "8-bit card\n", dev->name, data->name); |
| 841 | ret = -ENODEV; |
| 842 | goto free; |
| 843 | |
| 844 | default: |
| 845 | break; |
| 846 | } |
| 847 | |
| 848 | if (ether3_init_2(dev)) { |
| 849 | ret = -ENODEV; |
| 850 | goto free; |
| 851 | } |
| 852 | |
| 853 | dev->open = ether3_open; |
| 854 | dev->stop = ether3_close; |
| 855 | dev->hard_start_xmit = ether3_sendpacket; |
| 856 | dev->get_stats = ether3_getstats; |
| 857 | dev->set_multicast_list = ether3_setmulticastlist; |
| 858 | dev->tx_timeout = ether3_timeout; |
| 859 | dev->watchdog_timeo = 5 * HZ / 100; |
| 860 | |
| 861 | ret = register_netdev(dev); |
| 862 | if (ret) |
| 863 | goto free; |
| 864 | |
| 865 | printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no); |
| 866 | for (i = 0; i < 6; i++) |
| 867 | printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); |
| 868 | |
| 869 | ecard_set_drvdata(ec, dev); |
| 870 | return 0; |
| 871 | |
| 872 | free: |
| 873 | if (priv(dev)->base) |
| 874 | iounmap(priv(dev)->base); |
| 875 | free_netdev(dev); |
| 876 | release: |
| 877 | ecard_release_resources(ec); |
| 878 | out: |
| 879 | return ret; |
| 880 | } |
| 881 | |
| 882 | static void __devexit ether3_remove(struct expansion_card *ec) |
| 883 | { |
| 884 | struct net_device *dev = ecard_get_drvdata(ec); |
| 885 | |
| 886 | ecard_set_drvdata(ec, NULL); |
| 887 | |
| 888 | unregister_netdev(dev); |
| 889 | iounmap(priv(dev)->base); |
| 890 | free_netdev(dev); |
| 891 | ecard_release_resources(ec); |
| 892 | } |
| 893 | |
| 894 | static struct ether3_data ether3 = { |
| 895 | .name = "ether3", |
| 896 | .base_offset = 0, |
| 897 | }; |
| 898 | |
| 899 | static struct ether3_data etherb = { |
| 900 | .name = "etherb", |
| 901 | .base_offset = 0x800, |
| 902 | }; |
| 903 | |
| 904 | static const struct ecard_id ether3_ids[] = { |
| 905 | { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, |
| 906 | { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, |
| 907 | { MANU_ANT, PROD_ANT_ETHERB, ðerb }, |
| 908 | { 0xffff, 0xffff } |
| 909 | }; |
| 910 | |
| 911 | static struct ecard_driver ether3_driver = { |
| 912 | .probe = ether3_probe, |
| 913 | .remove = __devexit_p(ether3_remove), |
| 914 | .id_table = ether3_ids, |
| 915 | .drv = { |
| 916 | .name = "ether3", |
| 917 | }, |
| 918 | }; |
| 919 | |
| 920 | static int __init ether3_init(void) |
| 921 | { |
| 922 | return ecard_register_driver(ðer3_driver); |
| 923 | } |
| 924 | |
| 925 | static void __exit ether3_exit(void) |
| 926 | { |
| 927 | ecard_remove_driver(ðer3_driver); |
| 928 | } |
| 929 | |
| 930 | module_init(ether3_init); |
| 931 | module_exit(ether3_exit); |
| 932 | |
| 933 | MODULE_LICENSE("GPL"); |