| 1 | /* ne-h8300.c: A NE2000 clone on H8/300 driver for linux. */ |
| 2 | /* |
| 3 | original ne.c |
| 4 | Written 1992-94 by Donald Becker. |
| 5 | |
| 6 | Copyright 1993 United States Government as represented by the |
| 7 | Director, National Security Agency. |
| 8 | |
| 9 | This software may be used and distributed according to the terms |
| 10 | of the GNU General Public License, incorporated herein by reference. |
| 11 | |
| 12 | The author may be reached as becker@scyld.com, or C/O |
| 13 | Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 |
| 14 | |
| 15 | H8/300 modified |
| 16 | Yoshinori Sato <ysato@users.sourceforge.jp> |
| 17 | */ |
| 18 | |
| 19 | static const char version1[] = |
| 20 | "ne-h8300.c:v1.00 2004/04/11 ysato\n"; |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/kernel.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/netdevice.h> |
| 29 | #include <linux/etherdevice.h> |
| 30 | #include <linux/jiffies.h> |
| 31 | |
| 32 | #include <asm/system.h> |
| 33 | #include <asm/io.h> |
| 34 | #include <asm/irq.h> |
| 35 | |
| 36 | #define EI_SHIFT(x) (ei_local->reg_offset[x]) |
| 37 | |
| 38 | #include "8390.h" |
| 39 | |
| 40 | #define DRV_NAME "ne-h8300" |
| 41 | |
| 42 | /* Some defines that people can play with if so inclined. */ |
| 43 | |
| 44 | /* Do we perform extra sanity checks on stuff ? */ |
| 45 | /* #define NE_SANITY_CHECK */ |
| 46 | |
| 47 | /* Do we implement the read before write bugfix ? */ |
| 48 | /* #define NE_RW_BUGFIX */ |
| 49 | |
| 50 | /* Do we have a non std. amount of memory? (in units of 256 byte pages) */ |
| 51 | /* #define PACKETBUF_MEMSIZE 0x40 */ |
| 52 | |
| 53 | /* A zero-terminated list of I/O addresses to be probed at boot. */ |
| 54 | |
| 55 | /* ---- No user-serviceable parts below ---- */ |
| 56 | |
| 57 | static const char version[] = |
| 58 | "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; |
| 59 | |
| 60 | #include "lib8390.c" |
| 61 | |
| 62 | #define NE_BASE (dev->base_addr) |
| 63 | #define NE_CMD 0x00 |
| 64 | #define NE_DATAPORT (ei_status.word16?0x20:0x10) /* NatSemi-defined port window offset. */ |
| 65 | #define NE_RESET (ei_status.word16?0x3f:0x1f) /* Issue a read to reset, a write to clear. */ |
| 66 | #define NE_IO_EXTENT (ei_status.word16?0x40:0x20) |
| 67 | |
| 68 | #define NESM_START_PG 0x40 /* First page of TX buffer */ |
| 69 | #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ |
| 70 | |
| 71 | static int ne_probe1(struct net_device *dev, int ioaddr); |
| 72 | |
| 73 | static int ne_open(struct net_device *dev); |
| 74 | static int ne_close(struct net_device *dev); |
| 75 | |
| 76 | static void ne_reset_8390(struct net_device *dev); |
| 77 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, |
| 78 | int ring_page); |
| 79 | static void ne_block_input(struct net_device *dev, int count, |
| 80 | struct sk_buff *skb, int ring_offset); |
| 81 | static void ne_block_output(struct net_device *dev, const int count, |
| 82 | const unsigned char *buf, const int start_page); |
| 83 | |
| 84 | |
| 85 | static u32 reg_offset[16]; |
| 86 | |
| 87 | static int __init init_reg_offset(struct net_device *dev,unsigned long base_addr) |
| 88 | { |
| 89 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 90 | int i; |
| 91 | unsigned char bus_width; |
| 92 | |
| 93 | bus_width = *(volatile unsigned char *)ABWCR; |
| 94 | bus_width &= 1 << ((base_addr >> 21) & 7); |
| 95 | |
| 96 | for (i = 0; i < ARRAY_SIZE(reg_offset); i++) |
| 97 | if (bus_width == 0) |
| 98 | reg_offset[i] = i * 2 + 1; |
| 99 | else |
| 100 | reg_offset[i] = i; |
| 101 | |
| 102 | ei_local->reg_offset = reg_offset; |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | static int __initdata h8300_ne_count = 0; |
| 107 | #ifdef CONFIG_H8300H_H8MAX |
| 108 | static unsigned long __initdata h8300_ne_base[] = { 0x800600 }; |
| 109 | static int h8300_ne_irq[] = {EXT_IRQ4}; |
| 110 | #endif |
| 111 | #ifdef CONFIG_H8300H_AKI3068NET |
| 112 | static unsigned long __initdata h8300_ne_base[] = { 0x200000 }; |
| 113 | static int h8300_ne_irq[] = {EXT_IRQ5}; |
| 114 | #endif |
| 115 | |
| 116 | static inline int init_dev(struct net_device *dev) |
| 117 | { |
| 118 | if (h8300_ne_count < ARRAY_SIZE(h8300_ne_base)) { |
| 119 | dev->base_addr = h8300_ne_base[h8300_ne_count]; |
| 120 | dev->irq = h8300_ne_irq[h8300_ne_count]; |
| 121 | h8300_ne_count++; |
| 122 | return 0; |
| 123 | } else |
| 124 | return -ENODEV; |
| 125 | } |
| 126 | |
| 127 | /* Probe for various non-shared-memory ethercards. |
| 128 | |
| 129 | NEx000-clone boards have a Station Address PROM (SAPROM) in the packet |
| 130 | buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of |
| 131 | the SAPROM, while other supposed NE2000 clones must be detected by their |
| 132 | SA prefix. |
| 133 | |
| 134 | Reading the SAPROM from a word-wide card with the 8390 set in byte-wide |
| 135 | mode results in doubled values, which can be detected and compensated for. |
| 136 | |
| 137 | The probe is also responsible for initializing the card and filling |
| 138 | in the 'dev' and 'ei_status' structures. |
| 139 | |
| 140 | We use the minimum memory size for some ethercard product lines, iff we can't |
| 141 | distinguish models. You can increase the packet buffer size by setting |
| 142 | PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are: |
| 143 | E1010 starts at 0x100 and ends at 0x2000. |
| 144 | E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory") |
| 145 | E2010 starts at 0x100 and ends at 0x4000. |
| 146 | E2010-x starts at 0x100 and ends at 0xffff. */ |
| 147 | |
| 148 | static int __init do_ne_probe(struct net_device *dev) |
| 149 | { |
| 150 | unsigned int base_addr = dev->base_addr; |
| 151 | |
| 152 | /* First check any supplied i/o locations. User knows best. <cough> */ |
| 153 | if (base_addr > 0x1ff) /* Check a single specified location. */ |
| 154 | return ne_probe1(dev, base_addr); |
| 155 | else if (base_addr != 0) /* Don't probe at all. */ |
| 156 | return -ENXIO; |
| 157 | |
| 158 | return -ENODEV; |
| 159 | } |
| 160 | |
| 161 | static void cleanup_card(struct net_device *dev) |
| 162 | { |
| 163 | free_irq(dev->irq, dev); |
| 164 | release_region(dev->base_addr, NE_IO_EXTENT); |
| 165 | } |
| 166 | |
| 167 | #ifndef MODULE |
| 168 | struct net_device * __init ne_probe(int unit) |
| 169 | { |
| 170 | struct net_device *dev = alloc_ei_netdev(); |
| 171 | int err; |
| 172 | |
| 173 | if (!dev) |
| 174 | return ERR_PTR(-ENOMEM); |
| 175 | |
| 176 | if (init_dev(dev)) |
| 177 | return ERR_PTR(-ENODEV); |
| 178 | |
| 179 | sprintf(dev->name, "eth%d", unit); |
| 180 | netdev_boot_setup_check(dev); |
| 181 | |
| 182 | err = init_reg_offset(dev, dev->base_addr); |
| 183 | if (err) |
| 184 | goto out; |
| 185 | |
| 186 | err = do_ne_probe(dev); |
| 187 | if (err) |
| 188 | goto out; |
| 189 | return dev; |
| 190 | out: |
| 191 | free_netdev(dev); |
| 192 | return ERR_PTR(err); |
| 193 | } |
| 194 | #endif |
| 195 | |
| 196 | static const struct net_device_ops ne_netdev_ops = { |
| 197 | .ndo_open = ne_open, |
| 198 | .ndo_stop = ne_close, |
| 199 | |
| 200 | .ndo_start_xmit = ei_start_xmit, |
| 201 | .ndo_tx_timeout = ei_tx_timeout, |
| 202 | .ndo_get_stats = ei_get_stats, |
| 203 | .ndo_set_multicast_list = ei_set_multicast_list, |
| 204 | .ndo_validate_addr = eth_validate_addr, |
| 205 | .ndo_set_mac_address = eth_mac_addr, |
| 206 | .ndo_change_mtu = eth_change_mtu, |
| 207 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 208 | .ndo_poll_controller = ei_poll, |
| 209 | #endif |
| 210 | }; |
| 211 | |
| 212 | static int __init ne_probe1(struct net_device *dev, int ioaddr) |
| 213 | { |
| 214 | int i; |
| 215 | unsigned char SA_prom[16]; |
| 216 | int wordlength = 2; |
| 217 | const char *name = NULL; |
| 218 | int start_page, stop_page; |
| 219 | int reg0, ret; |
| 220 | static unsigned version_printed; |
| 221 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 222 | unsigned char bus_width; |
| 223 | |
| 224 | if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME)) |
| 225 | return -EBUSY; |
| 226 | |
| 227 | reg0 = inb_p(ioaddr); |
| 228 | if (reg0 == 0xFF) { |
| 229 | ret = -ENODEV; |
| 230 | goto err_out; |
| 231 | } |
| 232 | |
| 233 | /* Do a preliminary verification that we have a 8390. */ |
| 234 | { |
| 235 | int regd; |
| 236 | outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD); |
| 237 | regd = inb_p(ioaddr + EI_SHIFT(0x0d)); |
| 238 | outb_p(0xff, ioaddr + EI_SHIFT(0x0d)); |
| 239 | outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD); |
| 240 | inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */ |
| 241 | if (inb_p(ioaddr + EN0_COUNTER0) != 0) { |
| 242 | outb_p(reg0, ioaddr + EI_SHIFT(0)); |
| 243 | outb_p(regd, ioaddr + EI_SHIFT(0x0d)); /* Restore the old values. */ |
| 244 | ret = -ENODEV; |
| 245 | goto err_out; |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | if (ei_debug && version_printed++ == 0) |
| 250 | printk(KERN_INFO "%s", version1); |
| 251 | |
| 252 | printk(KERN_INFO "NE*000 ethercard probe at %08x:", ioaddr); |
| 253 | |
| 254 | /* Read the 16 bytes of station address PROM. |
| 255 | We must first initialize registers, similar to NS8390_init(eifdev, 0). |
| 256 | We can't reliably read the SAPROM address without this. |
| 257 | (I learned the hard way!). */ |
| 258 | { |
| 259 | struct {unsigned char value, offset; } program_seq[] = |
| 260 | { |
| 261 | {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ |
| 262 | {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */ |
| 263 | {0x00, EN0_RCNTLO}, /* Clear the count regs. */ |
| 264 | {0x00, EN0_RCNTHI}, |
| 265 | {0x00, EN0_IMR}, /* Mask completion irq. */ |
| 266 | {0xFF, EN0_ISR}, |
| 267 | {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */ |
| 268 | {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ |
| 269 | {32, EN0_RCNTLO}, |
| 270 | {0x00, EN0_RCNTHI}, |
| 271 | {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */ |
| 272 | {0x00, EN0_RSARHI}, |
| 273 | {E8390_RREAD+E8390_START, E8390_CMD}, |
| 274 | }; |
| 275 | |
| 276 | for (i = 0; i < ARRAY_SIZE(program_seq); i++) |
| 277 | outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); |
| 278 | |
| 279 | } |
| 280 | bus_width = *(volatile unsigned char *)ABWCR; |
| 281 | bus_width &= 1 << ((ioaddr >> 21) & 7); |
| 282 | ei_status.word16 = (bus_width == 0); /* temporary setting */ |
| 283 | for(i = 0; i < 16 /*sizeof(SA_prom)*/; i++) { |
| 284 | SA_prom[i] = inb_p(ioaddr + NE_DATAPORT); |
| 285 | inb_p(ioaddr + NE_DATAPORT); /* dummy read */ |
| 286 | } |
| 287 | |
| 288 | start_page = NESM_START_PG; |
| 289 | stop_page = NESM_STOP_PG; |
| 290 | |
| 291 | if (bus_width) |
| 292 | wordlength = 1; |
| 293 | else |
| 294 | outb_p(0x49, ioaddr + EN0_DCFG); |
| 295 | |
| 296 | /* Set up the rest of the parameters. */ |
| 297 | name = (wordlength == 2) ? "NE2000" : "NE1000"; |
| 298 | |
| 299 | if (! dev->irq) { |
| 300 | printk(" failed to detect IRQ line.\n"); |
| 301 | ret = -EAGAIN; |
| 302 | goto err_out; |
| 303 | } |
| 304 | |
| 305 | /* Snarf the interrupt now. There's no point in waiting since we cannot |
| 306 | share and the board will usually be enabled. */ |
| 307 | ret = request_irq(dev->irq, __ei_interrupt, 0, name, dev); |
| 308 | if (ret) { |
| 309 | printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret); |
| 310 | goto err_out; |
| 311 | } |
| 312 | |
| 313 | dev->base_addr = ioaddr; |
| 314 | |
| 315 | for(i = 0; i < ETHER_ADDR_LEN; i++) |
| 316 | dev->dev_addr[i] = SA_prom[i]; |
| 317 | printk(" %pM\n", dev->dev_addr); |
| 318 | |
| 319 | printk("%s: %s found at %#x, using IRQ %d.\n", |
| 320 | dev->name, name, ioaddr, dev->irq); |
| 321 | |
| 322 | ei_status.name = name; |
| 323 | ei_status.tx_start_page = start_page; |
| 324 | ei_status.stop_page = stop_page; |
| 325 | ei_status.word16 = (wordlength == 2); |
| 326 | |
| 327 | ei_status.rx_start_page = start_page + TX_PAGES; |
| 328 | #ifdef PACKETBUF_MEMSIZE |
| 329 | /* Allow the packet buffer size to be overridden by know-it-alls. */ |
| 330 | ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE; |
| 331 | #endif |
| 332 | |
| 333 | ei_status.reset_8390 = &ne_reset_8390; |
| 334 | ei_status.block_input = &ne_block_input; |
| 335 | ei_status.block_output = &ne_block_output; |
| 336 | ei_status.get_8390_hdr = &ne_get_8390_hdr; |
| 337 | ei_status.priv = 0; |
| 338 | |
| 339 | dev->netdev_ops = &ne_netdev_ops; |
| 340 | |
| 341 | __NS8390_init(dev, 0); |
| 342 | |
| 343 | ret = register_netdev(dev); |
| 344 | if (ret) |
| 345 | goto out_irq; |
| 346 | return 0; |
| 347 | out_irq: |
| 348 | free_irq(dev->irq, dev); |
| 349 | err_out: |
| 350 | release_region(ioaddr, NE_IO_EXTENT); |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | static int ne_open(struct net_device *dev) |
| 355 | { |
| 356 | __ei_open(dev); |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | static int ne_close(struct net_device *dev) |
| 361 | { |
| 362 | if (ei_debug > 1) |
| 363 | printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name); |
| 364 | __ei_close(dev); |
| 365 | return 0; |
| 366 | } |
| 367 | |
| 368 | /* Hard reset the card. This used to pause for the same period that a |
| 369 | 8390 reset command required, but that shouldn't be necessary. */ |
| 370 | |
| 371 | static void ne_reset_8390(struct net_device *dev) |
| 372 | { |
| 373 | unsigned long reset_start_time = jiffies; |
| 374 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 375 | |
| 376 | if (ei_debug > 1) |
| 377 | printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies); |
| 378 | |
| 379 | /* DON'T change these to inb_p/outb_p or reset will fail on clones. */ |
| 380 | outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET); |
| 381 | |
| 382 | ei_status.txing = 0; |
| 383 | ei_status.dmaing = 0; |
| 384 | |
| 385 | /* This check _should_not_ be necessary, omit eventually. */ |
| 386 | while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0) |
| 387 | if (time_after(jiffies, reset_start_time + 2*HZ/100)) { |
| 388 | printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name); |
| 389 | break; |
| 390 | } |
| 391 | outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */ |
| 392 | } |
| 393 | |
| 394 | /* Grab the 8390 specific header. Similar to the block_input routine, but |
| 395 | we don't need to be concerned with ring wrap as the header will be at |
| 396 | the start of a page, so we optimize accordingly. */ |
| 397 | |
| 398 | static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page) |
| 399 | { |
| 400 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 401 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ |
| 402 | |
| 403 | if (ei_status.dmaing) |
| 404 | { |
| 405 | printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr " |
| 406 | "[DMAstat:%d][irqlock:%d].\n", |
| 407 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 408 | return; |
| 409 | } |
| 410 | |
| 411 | ei_status.dmaing |= 0x01; |
| 412 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); |
| 413 | outb_p(sizeof(struct e8390_pkt_hdr), NE_BASE + EN0_RCNTLO); |
| 414 | outb_p(0, NE_BASE + EN0_RCNTHI); |
| 415 | outb_p(0, NE_BASE + EN0_RSARLO); /* On page boundary */ |
| 416 | outb_p(ring_page, NE_BASE + EN0_RSARHI); |
| 417 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); |
| 418 | |
| 419 | if (ei_status.word16) { |
| 420 | int len; |
| 421 | unsigned short *p = (unsigned short *)hdr; |
| 422 | for (len = sizeof(struct e8390_pkt_hdr)>>1; len > 0; len--) |
| 423 | *p++ = inw(NE_BASE + NE_DATAPORT); |
| 424 | } else |
| 425 | insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)); |
| 426 | |
| 427 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ |
| 428 | ei_status.dmaing &= ~0x01; |
| 429 | |
| 430 | le16_to_cpus(&hdr->count); |
| 431 | } |
| 432 | |
| 433 | /* Block input and output, similar to the Crynwr packet driver. If you |
| 434 | are porting to a new ethercard, look at the packet driver source for hints. |
| 435 | The NEx000 doesn't share the on-board packet memory -- you have to put |
| 436 | the packet out through the "remote DMA" dataport using outb. */ |
| 437 | |
| 438 | static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) |
| 439 | { |
| 440 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 441 | #ifdef NE_SANITY_CHECK |
| 442 | int xfer_count = count; |
| 443 | #endif |
| 444 | char *buf = skb->data; |
| 445 | |
| 446 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ |
| 447 | if (ei_status.dmaing) |
| 448 | { |
| 449 | printk(KERN_EMERG "%s: DMAing conflict in ne_block_input " |
| 450 | "[DMAstat:%d][irqlock:%d].\n", |
| 451 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 452 | return; |
| 453 | } |
| 454 | ei_status.dmaing |= 0x01; |
| 455 | outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD); |
| 456 | outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); |
| 457 | outb_p(count >> 8, NE_BASE + EN0_RCNTHI); |
| 458 | outb_p(ring_offset & 0xff, NE_BASE + EN0_RSARLO); |
| 459 | outb_p(ring_offset >> 8, NE_BASE + EN0_RSARHI); |
| 460 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); |
| 461 | if (ei_status.word16) |
| 462 | { |
| 463 | int len; |
| 464 | unsigned short *p = (unsigned short *)buf; |
| 465 | for (len = count>>1; len > 0; len--) |
| 466 | *p++ = inw(NE_BASE + NE_DATAPORT); |
| 467 | if (count & 0x01) |
| 468 | { |
| 469 | buf[count-1] = inb(NE_BASE + NE_DATAPORT); |
| 470 | #ifdef NE_SANITY_CHECK |
| 471 | xfer_count++; |
| 472 | #endif |
| 473 | } |
| 474 | } else { |
| 475 | insb(NE_BASE + NE_DATAPORT, buf, count); |
| 476 | } |
| 477 | |
| 478 | #ifdef NE_SANITY_CHECK |
| 479 | /* This was for the ALPHA version only, but enough people have |
| 480 | been encountering problems so it is still here. If you see |
| 481 | this message you either 1) have a slightly incompatible clone |
| 482 | or 2) have noise/speed problems with your bus. */ |
| 483 | |
| 484 | if (ei_debug > 1) |
| 485 | { |
| 486 | /* DMA termination address check... */ |
| 487 | int addr, tries = 20; |
| 488 | do { |
| 489 | /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here |
| 490 | -- it's broken for Rx on some cards! */ |
| 491 | int high = inb_p(NE_BASE + EN0_RSARHI); |
| 492 | int low = inb_p(NE_BASE + EN0_RSARLO); |
| 493 | addr = (high << 8) + low; |
| 494 | if (((ring_offset + xfer_count) & 0xff) == low) |
| 495 | break; |
| 496 | } while (--tries > 0); |
| 497 | if (tries <= 0) |
| 498 | printk(KERN_WARNING "%s: RX transfer address mismatch," |
| 499 | "%#4.4x (expected) vs. %#4.4x (actual).\n", |
| 500 | dev->name, ring_offset + xfer_count, addr); |
| 501 | } |
| 502 | #endif |
| 503 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ |
| 504 | ei_status.dmaing &= ~0x01; |
| 505 | } |
| 506 | |
| 507 | static void ne_block_output(struct net_device *dev, int count, |
| 508 | const unsigned char *buf, const int start_page) |
| 509 | { |
| 510 | struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); |
| 511 | unsigned long dma_start; |
| 512 | #ifdef NE_SANITY_CHECK |
| 513 | int retries = 0; |
| 514 | #endif |
| 515 | |
| 516 | /* Round the count up for word writes. Do we need to do this? |
| 517 | What effect will an odd byte count have on the 8390? |
| 518 | I should check someday. */ |
| 519 | |
| 520 | if (ei_status.word16 && (count & 0x01)) |
| 521 | count++; |
| 522 | |
| 523 | /* This *shouldn't* happen. If it does, it's the last thing you'll see */ |
| 524 | if (ei_status.dmaing) |
| 525 | { |
| 526 | printk(KERN_EMERG "%s: DMAing conflict in ne_block_output." |
| 527 | "[DMAstat:%d][irqlock:%d]\n", |
| 528 | dev->name, ei_status.dmaing, ei_status.irqlock); |
| 529 | return; |
| 530 | } |
| 531 | ei_status.dmaing |= 0x01; |
| 532 | /* We should already be in page 0, but to be safe... */ |
| 533 | outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, NE_BASE + NE_CMD); |
| 534 | |
| 535 | #ifdef NE_SANITY_CHECK |
| 536 | retry: |
| 537 | #endif |
| 538 | |
| 539 | #ifdef NE8390_RW_BUGFIX |
| 540 | /* Handle the read-before-write bug the same way as the |
| 541 | Crynwr packet driver -- the NatSemi method doesn't work. |
| 542 | Actually this doesn't always work either, but if you have |
| 543 | problems with your NEx000 this is better than nothing! */ |
| 544 | |
| 545 | outb_p(0x42, NE_BASE + EN0_RCNTLO); |
| 546 | outb_p(0x00, NE_BASE + EN0_RCNTHI); |
| 547 | outb_p(0x42, NE_BASE + EN0_RSARLO); |
| 548 | outb_p(0x00, NE_BASE + EN0_RSARHI); |
| 549 | outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD); |
| 550 | /* Make certain that the dummy read has occurred. */ |
| 551 | udelay(6); |
| 552 | #endif |
| 553 | |
| 554 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); |
| 555 | |
| 556 | /* Now the normal output. */ |
| 557 | outb_p(count & 0xff, NE_BASE + EN0_RCNTLO); |
| 558 | outb_p(count >> 8, NE_BASE + EN0_RCNTHI); |
| 559 | outb_p(0x00, NE_BASE + EN0_RSARLO); |
| 560 | outb_p(start_page, NE_BASE + EN0_RSARHI); |
| 561 | |
| 562 | outb_p(E8390_RWRITE+E8390_START, NE_BASE + NE_CMD); |
| 563 | if (ei_status.word16) { |
| 564 | int len; |
| 565 | unsigned short *p = (unsigned short *)buf; |
| 566 | for (len = count>>1; len > 0; len--) |
| 567 | outw(*p++, NE_BASE + NE_DATAPORT); |
| 568 | } else { |
| 569 | outsb(NE_BASE + NE_DATAPORT, buf, count); |
| 570 | } |
| 571 | |
| 572 | dma_start = jiffies; |
| 573 | |
| 574 | #ifdef NE_SANITY_CHECK |
| 575 | /* This was for the ALPHA version only, but enough people have |
| 576 | been encountering problems so it is still here. */ |
| 577 | |
| 578 | if (ei_debug > 1) |
| 579 | { |
| 580 | /* DMA termination address check... */ |
| 581 | int addr, tries = 20; |
| 582 | do { |
| 583 | int high = inb_p(NE_BASE + EN0_RSARHI); |
| 584 | int low = inb_p(NE_BASE + EN0_RSARLO); |
| 585 | addr = (high << 8) + low; |
| 586 | if ((start_page << 8) + count == addr) |
| 587 | break; |
| 588 | } while (--tries > 0); |
| 589 | |
| 590 | if (tries <= 0) |
| 591 | { |
| 592 | printk(KERN_WARNING "%s: Tx packet transfer address mismatch," |
| 593 | "%#4.4x (expected) vs. %#4.4x (actual).\n", |
| 594 | dev->name, (start_page << 8) + count, addr); |
| 595 | if (retries++ == 0) |
| 596 | goto retry; |
| 597 | } |
| 598 | } |
| 599 | #endif |
| 600 | |
| 601 | while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0) |
| 602 | if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */ |
| 603 | printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name); |
| 604 | ne_reset_8390(dev); |
| 605 | __NS8390_init(dev,1); |
| 606 | break; |
| 607 | } |
| 608 | |
| 609 | outb_p(ENISR_RDC, NE_BASE + EN0_ISR); /* Ack intr. */ |
| 610 | ei_status.dmaing &= ~0x01; |
| 611 | return; |
| 612 | } |
| 613 | |
| 614 | |
| 615 | #ifdef MODULE |
| 616 | #define MAX_NE_CARDS 1 /* Max number of NE cards per module */ |
| 617 | static struct net_device *dev_ne[MAX_NE_CARDS]; |
| 618 | static int io[MAX_NE_CARDS]; |
| 619 | static int irq[MAX_NE_CARDS]; |
| 620 | static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */ |
| 621 | |
| 622 | module_param_array(io, int, NULL, 0); |
| 623 | module_param_array(irq, int, NULL, 0); |
| 624 | module_param_array(bad, int, NULL, 0); |
| 625 | MODULE_PARM_DESC(io, "I/O base address(es)"); |
| 626 | MODULE_PARM_DESC(irq, "IRQ number(s)"); |
| 627 | MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver"); |
| 628 | MODULE_LICENSE("GPL"); |
| 629 | |
| 630 | /* This is set up so that no ISA autoprobe takes place. We can't guarantee |
| 631 | that the ne2k probe is the last 8390 based probe to take place (as it |
| 632 | is at boot) and so the probe will get confused by any other 8390 cards. |
| 633 | ISA device autoprobes on a running machine are not recommended anyway. */ |
| 634 | |
| 635 | int init_module(void) |
| 636 | { |
| 637 | int this_dev, found = 0; |
| 638 | int err; |
| 639 | |
| 640 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { |
| 641 | struct net_device *dev = alloc_ei_netdev(); |
| 642 | if (!dev) |
| 643 | break; |
| 644 | if (io[this_dev]) { |
| 645 | dev->irq = irq[this_dev]; |
| 646 | dev->mem_end = bad[this_dev]; |
| 647 | dev->base_addr = io[this_dev]; |
| 648 | } else { |
| 649 | dev->base_addr = h8300_ne_base[this_dev]; |
| 650 | dev->irq = h8300_ne_irq[this_dev]; |
| 651 | } |
| 652 | err = init_reg_offset(dev, dev->base_addr); |
| 653 | if (!err) { |
| 654 | if (do_ne_probe(dev) == 0) { |
| 655 | dev_ne[found++] = dev; |
| 656 | continue; |
| 657 | } |
| 658 | } |
| 659 | free_netdev(dev); |
| 660 | if (found) |
| 661 | break; |
| 662 | if (io[this_dev] != 0) |
| 663 | printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", dev->base_addr); |
| 664 | else |
| 665 | printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n"); |
| 666 | return -ENXIO; |
| 667 | } |
| 668 | if (found) |
| 669 | return 0; |
| 670 | return -ENODEV; |
| 671 | } |
| 672 | |
| 673 | void cleanup_module(void) |
| 674 | { |
| 675 | int this_dev; |
| 676 | |
| 677 | for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) { |
| 678 | struct net_device *dev = dev_ne[this_dev]; |
| 679 | if (dev) { |
| 680 | unregister_netdev(dev); |
| 681 | cleanup_card(dev); |
| 682 | free_netdev(dev); |
| 683 | } |
| 684 | } |
| 685 | } |
| 686 | #endif /* MODULE */ |