Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Amiga Linux/m68k Ariadne Ethernet Driver |
| 3 | * |
| 4 | * © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org) |
| 5 | * Peter De Schrijver (p2@mind.be) |
| 6 | * |
| 7 | * --------------------------------------------------------------------------- |
| 8 | * |
| 9 | * This program is based on |
| 10 | * |
| 11 | * lance.c: An AMD LANCE ethernet driver for linux. |
| 12 | * Written 1993-94 by Donald Becker. |
| 13 | * |
| 14 | * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller |
| 15 | * Advanced Micro Devices |
| 16 | * Publication #16907, Rev. B, Amendment/0, May 1994 |
| 17 | * |
| 18 | * MC68230: Parallel Interface/Timer (PI/T) |
| 19 | * Motorola Semiconductors, December, 1983 |
| 20 | * |
| 21 | * --------------------------------------------------------------------------- |
| 22 | * |
| 23 | * This file is subject to the terms and conditions of the GNU General Public |
| 24 | * License. See the file COPYING in the main directory of the Linux |
| 25 | * distribution for more details. |
| 26 | * |
| 27 | * --------------------------------------------------------------------------- |
| 28 | * |
| 29 | * The Ariadne is a Zorro-II board made by Village Tronic. It contains: |
| 30 | * |
| 31 | * - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both |
| 32 | * 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors |
| 33 | * |
| 34 | * - an MC68230 Parallel Interface/Timer configured as 2 parallel ports |
| 35 | */ |
| 36 | |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/stddef.h> |
| 39 | #include <linux/kernel.h> |
| 40 | #include <linux/string.h> |
| 41 | #include <linux/errno.h> |
| 42 | #include <linux/ioport.h> |
| 43 | #include <linux/slab.h> |
| 44 | #include <linux/netdevice.h> |
| 45 | #include <linux/etherdevice.h> |
| 46 | #include <linux/interrupt.h> |
| 47 | #include <linux/skbuff.h> |
| 48 | #include <linux/init.h> |
| 49 | #include <linux/zorro.h> |
| 50 | #include <linux/bitops.h> |
| 51 | |
| 52 | #include <asm/amigaints.h> |
| 53 | #include <asm/amigahw.h> |
| 54 | #include <asm/irq.h> |
| 55 | |
| 56 | #include "ariadne.h" |
| 57 | |
| 58 | |
| 59 | #ifdef ARIADNE_DEBUG |
| 60 | int ariadne_debug = ARIADNE_DEBUG; |
| 61 | #else |
| 62 | int ariadne_debug = 1; |
| 63 | #endif |
| 64 | |
| 65 | |
| 66 | /* |
| 67 | * Macros to Fix Endianness problems |
| 68 | */ |
| 69 | |
| 70 | /* Swap the Bytes in a WORD */ |
| 71 | #define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00)) |
| 72 | /* Get the Low BYTE in a WORD */ |
| 73 | #define lowb(x) (x&0xff) |
| 74 | /* Get the Swapped High WORD in a LONG */ |
| 75 | #define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff)) |
| 76 | /* Get the Swapped Low WORD in a LONG */ |
| 77 | #define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff)) |
| 78 | |
| 79 | |
| 80 | /* |
| 81 | * Transmit/Receive Ring Definitions |
| 82 | */ |
| 83 | |
| 84 | #define TX_RING_SIZE 5 |
| 85 | #define RX_RING_SIZE 16 |
| 86 | |
| 87 | #define PKT_BUF_SIZE 1520 |
| 88 | |
| 89 | |
| 90 | /* |
| 91 | * Private Device Data |
| 92 | */ |
| 93 | |
| 94 | struct ariadne_private { |
| 95 | volatile struct TDRE *tx_ring[TX_RING_SIZE]; |
| 96 | volatile struct RDRE *rx_ring[RX_RING_SIZE]; |
| 97 | volatile u_short *tx_buff[TX_RING_SIZE]; |
| 98 | volatile u_short *rx_buff[RX_RING_SIZE]; |
| 99 | int cur_tx, cur_rx; /* The next free ring entry */ |
| 100 | int dirty_tx; /* The ring entries to be free()ed. */ |
| 101 | struct net_device_stats stats; |
| 102 | char tx_full; |
| 103 | }; |
| 104 | |
| 105 | |
| 106 | /* |
| 107 | * Structure Created in the Ariadne's RAM Buffer |
| 108 | */ |
| 109 | |
| 110 | struct lancedata { |
| 111 | struct TDRE tx_ring[TX_RING_SIZE]; |
| 112 | struct RDRE rx_ring[RX_RING_SIZE]; |
| 113 | u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)]; |
| 114 | u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)]; |
| 115 | }; |
| 116 | |
| 117 | static int ariadne_open(struct net_device *dev); |
| 118 | static void ariadne_init_ring(struct net_device *dev); |
| 119 | static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev); |
| 120 | static void ariadne_tx_timeout(struct net_device *dev); |
| 121 | static int ariadne_rx(struct net_device *dev); |
| 122 | static void ariadne_reset(struct net_device *dev); |
| 123 | static irqreturn_t ariadne_interrupt(int irq, void *data, struct pt_regs *fp); |
| 124 | static int ariadne_close(struct net_device *dev); |
| 125 | static struct net_device_stats *ariadne_get_stats(struct net_device *dev); |
| 126 | #ifdef HAVE_MULTICAST |
| 127 | static void set_multicast_list(struct net_device *dev); |
| 128 | #endif |
| 129 | |
| 130 | |
| 131 | static void memcpyw(volatile u_short *dest, u_short *src, int len) |
| 132 | { |
| 133 | while (len >= 2) { |
| 134 | *(dest++) = *(src++); |
| 135 | len -= 2; |
| 136 | } |
| 137 | if (len == 1) |
| 138 | *dest = (*(u_char *)src)<<8; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | static int __devinit ariadne_init_one(struct zorro_dev *z, |
| 143 | const struct zorro_device_id *ent); |
| 144 | static void __devexit ariadne_remove_one(struct zorro_dev *z); |
| 145 | |
| 146 | |
| 147 | static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = { |
| 148 | { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE }, |
| 149 | { 0 } |
| 150 | }; |
| 151 | |
| 152 | static struct zorro_driver ariadne_driver = { |
| 153 | .name = "ariadne", |
| 154 | .id_table = ariadne_zorro_tbl, |
| 155 | .probe = ariadne_init_one, |
| 156 | .remove = __devexit_p(ariadne_remove_one), |
| 157 | }; |
| 158 | |
| 159 | static int __devinit ariadne_init_one(struct zorro_dev *z, |
| 160 | const struct zorro_device_id *ent) |
| 161 | { |
| 162 | unsigned long board = z->resource.start; |
| 163 | unsigned long base_addr = board+ARIADNE_LANCE; |
| 164 | unsigned long mem_start = board+ARIADNE_RAM; |
| 165 | struct resource *r1, *r2; |
| 166 | struct net_device *dev; |
| 167 | struct ariadne_private *priv; |
| 168 | int err; |
| 169 | |
| 170 | r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960"); |
| 171 | if (!r1) |
| 172 | return -EBUSY; |
| 173 | r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM"); |
| 174 | if (!r2) { |
| 175 | release_resource(r1); |
| 176 | return -EBUSY; |
| 177 | } |
| 178 | |
| 179 | dev = alloc_etherdev(sizeof(struct ariadne_private)); |
| 180 | if (dev == NULL) { |
| 181 | release_resource(r1); |
| 182 | release_resource(r2); |
| 183 | return -ENOMEM; |
| 184 | } |
| 185 | |
| 186 | SET_MODULE_OWNER(dev); |
| 187 | priv = netdev_priv(dev); |
| 188 | |
| 189 | r1->name = dev->name; |
| 190 | r2->name = dev->name; |
| 191 | |
| 192 | dev->dev_addr[0] = 0x00; |
| 193 | dev->dev_addr[1] = 0x60; |
| 194 | dev->dev_addr[2] = 0x30; |
| 195 | dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff; |
| 196 | dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff; |
| 197 | dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff; |
| 198 | dev->base_addr = ZTWO_VADDR(base_addr); |
| 199 | dev->mem_start = ZTWO_VADDR(mem_start); |
| 200 | dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE; |
| 201 | |
| 202 | dev->open = &ariadne_open; |
| 203 | dev->stop = &ariadne_close; |
| 204 | dev->hard_start_xmit = &ariadne_start_xmit; |
| 205 | dev->tx_timeout = &ariadne_tx_timeout; |
| 206 | dev->watchdog_timeo = 5*HZ; |
| 207 | dev->get_stats = &ariadne_get_stats; |
| 208 | dev->set_multicast_list = &set_multicast_list; |
| 209 | |
| 210 | err = register_netdev(dev); |
| 211 | if (err) { |
| 212 | release_resource(r1); |
| 213 | release_resource(r2); |
| 214 | free_netdev(dev); |
| 215 | return err; |
| 216 | } |
| 217 | zorro_set_drvdata(z, dev); |
| 218 | |
| 219 | printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address " |
| 220 | "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, board, |
| 221 | dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], |
| 222 | dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); |
| 223 | |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | |
| 228 | static int ariadne_open(struct net_device *dev) |
| 229 | { |
| 230 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 231 | u_short in; |
| 232 | u_long version; |
| 233 | int i; |
| 234 | |
| 235 | /* Reset the LANCE */ |
| 236 | in = lance->Reset; |
| 237 | |
| 238 | /* Stop the LANCE */ |
| 239 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 240 | lance->RDP = STOP; |
| 241 | |
| 242 | /* Check the LANCE version */ |
| 243 | lance->RAP = CSR88; /* Chip ID */ |
| 244 | version = swapw(lance->RDP); |
| 245 | lance->RAP = CSR89; /* Chip ID */ |
| 246 | version |= swapw(lance->RDP)<<16; |
| 247 | if ((version & 0x00000fff) != 0x00000003) { |
| 248 | printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n"); |
| 249 | return -EAGAIN; |
| 250 | } |
| 251 | if ((version & 0x0ffff000) != 0x00003000) { |
| 252 | printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part " |
| 253 | "number = %ld)\n", (version & 0x0ffff000)>>12); |
| 254 | return -EAGAIN; |
| 255 | } |
| 256 | #if 0 |
| 257 | printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n", |
| 258 | (version & 0xf0000000)>>28); |
| 259 | #endif |
| 260 | |
| 261 | ariadne_init_ring(dev); |
| 262 | |
| 263 | /* Miscellaneous Stuff */ |
| 264 | lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */ |
| 265 | lance->RDP = 0x0000; |
| 266 | lance->RAP = CSR4; /* Test and Features Control */ |
| 267 | lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM; |
| 268 | |
| 269 | /* Set the Multicast Table */ |
| 270 | lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */ |
| 271 | lance->RDP = 0x0000; |
| 272 | lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */ |
| 273 | lance->RDP = 0x0000; |
| 274 | lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */ |
| 275 | lance->RDP = 0x0000; |
| 276 | lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */ |
| 277 | lance->RDP = 0x0000; |
| 278 | |
| 279 | /* Set the Ethernet Hardware Address */ |
| 280 | lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */ |
| 281 | lance->RDP = ((u_short *)&dev->dev_addr[0])[0]; |
| 282 | lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */ |
| 283 | lance->RDP = ((u_short *)&dev->dev_addr[0])[1]; |
| 284 | lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */ |
| 285 | lance->RDP = ((u_short *)&dev->dev_addr[0])[2]; |
| 286 | |
| 287 | /* Set the Init Block Mode */ |
| 288 | lance->RAP = CSR15; /* Mode Register */ |
| 289 | lance->RDP = 0x0000; |
| 290 | |
| 291 | /* Set the Transmit Descriptor Ring Pointer */ |
| 292 | lance->RAP = CSR30; /* Base Address of Transmit Ring */ |
| 293 | lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring)); |
| 294 | lance->RAP = CSR31; /* Base Address of transmit Ring */ |
| 295 | lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring)); |
| 296 | |
| 297 | /* Set the Receive Descriptor Ring Pointer */ |
| 298 | lance->RAP = CSR24; /* Base Address of Receive Ring */ |
| 299 | lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring)); |
| 300 | lance->RAP = CSR25; /* Base Address of Receive Ring */ |
| 301 | lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring)); |
| 302 | |
| 303 | /* Set the Number of RX and TX Ring Entries */ |
| 304 | lance->RAP = CSR76; /* Receive Ring Length */ |
| 305 | lance->RDP = swapw(((u_short)-RX_RING_SIZE)); |
| 306 | lance->RAP = CSR78; /* Transmit Ring Length */ |
| 307 | lance->RDP = swapw(((u_short)-TX_RING_SIZE)); |
| 308 | |
| 309 | /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */ |
| 310 | lance->RAP = ISACSR2; /* Miscellaneous Configuration */ |
| 311 | lance->IDP = ASEL; |
| 312 | |
| 313 | /* LED Control */ |
| 314 | lance->RAP = ISACSR5; /* LED1 Status */ |
| 315 | lance->IDP = PSE|XMTE; |
| 316 | lance->RAP = ISACSR6; /* LED2 Status */ |
| 317 | lance->IDP = PSE|COLE; |
| 318 | lance->RAP = ISACSR7; /* LED3 Status */ |
| 319 | lance->IDP = PSE|RCVE; |
| 320 | |
| 321 | netif_start_queue(dev); |
| 322 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 323 | i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | dev->name, dev); |
| 325 | if (i) return i; |
| 326 | |
| 327 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 328 | lance->RDP = INEA|STRT; |
| 329 | |
| 330 | return 0; |
| 331 | } |
| 332 | |
| 333 | |
| 334 | static void ariadne_init_ring(struct net_device *dev) |
| 335 | { |
| 336 | struct ariadne_private *priv = netdev_priv(dev); |
| 337 | volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start; |
| 338 | int i; |
| 339 | |
| 340 | netif_stop_queue(dev); |
| 341 | |
| 342 | priv->tx_full = 0; |
| 343 | priv->cur_rx = priv->cur_tx = 0; |
| 344 | priv->dirty_tx = 0; |
| 345 | |
| 346 | /* Set up TX Ring */ |
| 347 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 348 | volatile struct TDRE *t = &lancedata->tx_ring[i]; |
| 349 | t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])); |
| 350 | t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) | |
| 351 | TF_STP | TF_ENP; |
| 352 | t->TMD2 = swapw((u_short)-PKT_BUF_SIZE); |
| 353 | t->TMD3 = 0; |
| 354 | priv->tx_ring[i] = &lancedata->tx_ring[i]; |
| 355 | priv->tx_buff[i] = lancedata->tx_buff[i]; |
| 356 | #if 0 |
| 357 | printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i, |
| 358 | &lancedata->tx_ring[i], lancedata->tx_buff[i]); |
| 359 | #endif |
| 360 | } |
| 361 | |
| 362 | /* Set up RX Ring */ |
| 363 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 364 | volatile struct RDRE *r = &lancedata->rx_ring[i]; |
| 365 | r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])); |
| 366 | r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) | |
| 367 | RF_OWN; |
| 368 | r->RMD2 = swapw((u_short)-PKT_BUF_SIZE); |
| 369 | r->RMD3 = 0x0000; |
| 370 | priv->rx_ring[i] = &lancedata->rx_ring[i]; |
| 371 | priv->rx_buff[i] = lancedata->rx_buff[i]; |
| 372 | #if 0 |
| 373 | printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i, |
| 374 | &lancedata->rx_ring[i], lancedata->rx_buff[i]); |
| 375 | #endif |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | |
| 380 | static int ariadne_close(struct net_device *dev) |
| 381 | { |
| 382 | struct ariadne_private *priv = netdev_priv(dev); |
| 383 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 384 | |
| 385 | netif_stop_queue(dev); |
| 386 | |
| 387 | lance->RAP = CSR112; /* Missed Frame Count */ |
| 388 | priv->stats.rx_missed_errors = swapw(lance->RDP); |
| 389 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 390 | |
| 391 | if (ariadne_debug > 1) { |
| 392 | printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n", |
| 393 | dev->name, lance->RDP); |
| 394 | printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name, |
| 395 | priv->stats.rx_missed_errors); |
| 396 | } |
| 397 | |
| 398 | /* We stop the LANCE here -- it occasionally polls memory if we don't. */ |
| 399 | lance->RDP = STOP; |
| 400 | |
| 401 | free_irq(IRQ_AMIGA_PORTS, dev); |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | |
| 407 | static inline void ariadne_reset(struct net_device *dev) |
| 408 | { |
| 409 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 410 | |
| 411 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 412 | lance->RDP = STOP; |
| 413 | ariadne_init_ring(dev); |
| 414 | lance->RDP = INEA|STRT; |
| 415 | netif_start_queue(dev); |
| 416 | } |
| 417 | |
| 418 | |
| 419 | static irqreturn_t ariadne_interrupt(int irq, void *data, struct pt_regs *fp) |
| 420 | { |
| 421 | struct net_device *dev = (struct net_device *)data; |
| 422 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 423 | struct ariadne_private *priv; |
| 424 | int csr0, boguscnt; |
| 425 | int handled = 0; |
| 426 | |
| 427 | if (dev == NULL) { |
| 428 | printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n"); |
| 429 | return IRQ_NONE; |
| 430 | } |
| 431 | |
| 432 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 433 | |
| 434 | if (!(lance->RDP & INTR)) /* Check if any interrupt has been */ |
| 435 | return IRQ_NONE; /* generated by the board. */ |
| 436 | |
| 437 | priv = netdev_priv(dev); |
| 438 | |
| 439 | boguscnt = 10; |
| 440 | while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) { |
| 441 | /* Acknowledge all of the current interrupt sources ASAP. */ |
| 442 | lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT); |
| 443 | |
| 444 | #if 0 |
| 445 | if (ariadne_debug > 5) { |
| 446 | printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.", |
| 447 | dev->name, csr0, lance->RDP); |
| 448 | printk("["); |
| 449 | if (csr0 & INTR) |
| 450 | printk(" INTR"); |
| 451 | if (csr0 & INEA) |
| 452 | printk(" INEA"); |
| 453 | if (csr0 & RXON) |
| 454 | printk(" RXON"); |
| 455 | if (csr0 & TXON) |
| 456 | printk(" TXON"); |
| 457 | if (csr0 & TDMD) |
| 458 | printk(" TDMD"); |
| 459 | if (csr0 & STOP) |
| 460 | printk(" STOP"); |
| 461 | if (csr0 & STRT) |
| 462 | printk(" STRT"); |
| 463 | if (csr0 & INIT) |
| 464 | printk(" INIT"); |
| 465 | if (csr0 & ERR) |
| 466 | printk(" ERR"); |
| 467 | if (csr0 & BABL) |
| 468 | printk(" BABL"); |
| 469 | if (csr0 & CERR) |
| 470 | printk(" CERR"); |
| 471 | if (csr0 & MISS) |
| 472 | printk(" MISS"); |
| 473 | if (csr0 & MERR) |
| 474 | printk(" MERR"); |
| 475 | if (csr0 & RINT) |
| 476 | printk(" RINT"); |
| 477 | if (csr0 & TINT) |
| 478 | printk(" TINT"); |
| 479 | if (csr0 & IDON) |
| 480 | printk(" IDON"); |
| 481 | printk(" ]\n"); |
| 482 | } |
| 483 | #endif |
| 484 | |
| 485 | if (csr0 & RINT) { /* Rx interrupt */ |
| 486 | handled = 1; |
| 487 | ariadne_rx(dev); |
| 488 | } |
| 489 | |
| 490 | if (csr0 & TINT) { /* Tx-done interrupt */ |
| 491 | int dirty_tx = priv->dirty_tx; |
| 492 | |
| 493 | handled = 1; |
| 494 | while (dirty_tx < priv->cur_tx) { |
| 495 | int entry = dirty_tx % TX_RING_SIZE; |
| 496 | int status = lowb(priv->tx_ring[entry]->TMD1); |
| 497 | |
| 498 | if (status & TF_OWN) |
| 499 | break; /* It still hasn't been Txed */ |
| 500 | |
| 501 | priv->tx_ring[entry]->TMD1 &= 0xff00; |
| 502 | |
| 503 | if (status & TF_ERR) { |
| 504 | /* There was an major error, log it. */ |
| 505 | int err_status = priv->tx_ring[entry]->TMD3; |
| 506 | priv->stats.tx_errors++; |
| 507 | if (err_status & EF_RTRY) |
| 508 | priv->stats.tx_aborted_errors++; |
| 509 | if (err_status & EF_LCAR) |
| 510 | priv->stats.tx_carrier_errors++; |
| 511 | if (err_status & EF_LCOL) |
| 512 | priv->stats.tx_window_errors++; |
| 513 | if (err_status & EF_UFLO) { |
| 514 | /* Ackk! On FIFO errors the Tx unit is turned off! */ |
| 515 | priv->stats.tx_fifo_errors++; |
| 516 | /* Remove this verbosity later! */ |
| 517 | printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n", |
| 518 | dev->name, csr0); |
| 519 | /* Restart the chip. */ |
| 520 | lance->RDP = STRT; |
| 521 | } |
| 522 | } else { |
| 523 | if (status & (TF_MORE|TF_ONE)) |
| 524 | priv->stats.collisions++; |
| 525 | priv->stats.tx_packets++; |
| 526 | } |
| 527 | dirty_tx++; |
| 528 | } |
| 529 | |
| 530 | #ifndef final_version |
| 531 | if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) { |
| 532 | printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, " |
| 533 | "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full); |
| 534 | dirty_tx += TX_RING_SIZE; |
| 535 | } |
| 536 | #endif |
| 537 | |
| 538 | if (priv->tx_full && netif_queue_stopped(dev) && |
| 539 | dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) { |
| 540 | /* The ring is no longer full. */ |
| 541 | priv->tx_full = 0; |
| 542 | netif_wake_queue(dev); |
| 543 | } |
| 544 | |
| 545 | priv->dirty_tx = dirty_tx; |
| 546 | } |
| 547 | |
| 548 | /* Log misc errors. */ |
| 549 | if (csr0 & BABL) { |
| 550 | handled = 1; |
| 551 | priv->stats.tx_errors++; /* Tx babble. */ |
| 552 | } |
| 553 | if (csr0 & MISS) { |
| 554 | handled = 1; |
| 555 | priv->stats.rx_errors++; /* Missed a Rx frame. */ |
| 556 | } |
| 557 | if (csr0 & MERR) { |
| 558 | handled = 1; |
| 559 | printk(KERN_ERR "%s: Bus master arbitration failure, status " |
| 560 | "%4.4x.\n", dev->name, csr0); |
| 561 | /* Restart the chip. */ |
| 562 | lance->RDP = STRT; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | /* Clear any other interrupt, and set interrupt enable. */ |
| 567 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 568 | lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON; |
| 569 | |
| 570 | #if 0 |
| 571 | if (ariadne_debug > 4) |
| 572 | printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name, |
| 573 | lance->RAP, lance->RDP); |
| 574 | #endif |
| 575 | return IRQ_RETVAL(handled); |
| 576 | } |
| 577 | |
| 578 | |
| 579 | static void ariadne_tx_timeout(struct net_device *dev) |
| 580 | { |
| 581 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 582 | |
| 583 | printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n", |
| 584 | dev->name, lance->RDP); |
| 585 | ariadne_reset(dev); |
| 586 | netif_wake_queue(dev); |
| 587 | } |
| 588 | |
| 589 | |
| 590 | static int ariadne_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 591 | { |
| 592 | struct ariadne_private *priv = netdev_priv(dev); |
| 593 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 594 | int entry; |
| 595 | unsigned long flags; |
| 596 | int len = skb->len; |
| 597 | |
| 598 | #if 0 |
| 599 | if (ariadne_debug > 3) { |
| 600 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 601 | printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n", |
| 602 | dev->name, lance->RDP); |
| 603 | lance->RDP = 0x0000; |
| 604 | } |
| 605 | #endif |
| 606 | |
| 607 | /* FIXME: is the 79C960 new enough to do its own padding right ? */ |
| 608 | if (skb->len < ETH_ZLEN) |
| 609 | { |
Herbert Xu | 5b057c6 | 2006-06-23 02:06:41 -0700 | [diff] [blame] | 610 | if (skb_padto(skb, ETH_ZLEN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | return 0; |
| 612 | len = ETH_ZLEN; |
| 613 | } |
| 614 | |
| 615 | /* Fill in a Tx ring entry */ |
| 616 | |
| 617 | #if 0 |
| 618 | printk(KERN_DEBUG "TX pkt type 0x%04x from ", ((u_short *)skb->data)[6]); |
| 619 | { |
| 620 | int i; |
| 621 | u_char *ptr = &((u_char *)skb->data)[6]; |
| 622 | for (i = 0; i < 6; i++) |
| 623 | printk("%02x", ptr[i]); |
| 624 | } |
| 625 | printk(" to "); |
| 626 | { |
| 627 | int i; |
| 628 | u_char *ptr = (u_char *)skb->data; |
| 629 | for (i = 0; i < 6; i++) |
| 630 | printk("%02x", ptr[i]); |
| 631 | } |
| 632 | printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len); |
| 633 | #endif |
| 634 | |
| 635 | local_irq_save(flags); |
| 636 | |
| 637 | entry = priv->cur_tx % TX_RING_SIZE; |
| 638 | |
| 639 | /* Caution: the write order is important here, set the base address with |
| 640 | the "ownership" bits last. */ |
| 641 | |
| 642 | priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len); |
| 643 | priv->tx_ring[entry]->TMD3 = 0x0000; |
| 644 | memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len); |
| 645 | |
| 646 | #if 0 |
| 647 | { |
| 648 | int i, len; |
| 649 | |
| 650 | len = skb->len > 64 ? 64 : skb->len; |
| 651 | len >>= 1; |
| 652 | for (i = 0; i < len; i += 8) { |
| 653 | int j; |
| 654 | printk(KERN_DEBUG "%04x:", i); |
| 655 | for (j = 0; (j < 8) && ((i+j) < len); j++) { |
| 656 | if (!(j & 1)) |
| 657 | printk(" "); |
| 658 | printk("%04x", priv->tx_buff[entry][i+j]); |
| 659 | } |
| 660 | printk("\n"); |
| 661 | } |
| 662 | } |
| 663 | #endif |
| 664 | |
| 665 | priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP; |
| 666 | |
| 667 | dev_kfree_skb(skb); |
| 668 | |
| 669 | priv->cur_tx++; |
| 670 | if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) { |
| 671 | |
| 672 | #if 0 |
| 673 | printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and " |
| 674 | "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx); |
| 675 | #endif |
| 676 | |
| 677 | priv->cur_tx -= TX_RING_SIZE; |
| 678 | priv->dirty_tx -= TX_RING_SIZE; |
| 679 | } |
| 680 | |
| 681 | /* Trigger an immediate send poll. */ |
| 682 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 683 | lance->RDP = INEA|TDMD; |
| 684 | |
| 685 | dev->trans_start = jiffies; |
| 686 | |
| 687 | if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) { |
| 688 | netif_stop_queue(dev); |
| 689 | priv->tx_full = 1; |
| 690 | } |
| 691 | local_irq_restore(flags); |
| 692 | |
| 693 | return 0; |
| 694 | } |
| 695 | |
| 696 | |
| 697 | static int ariadne_rx(struct net_device *dev) |
| 698 | { |
| 699 | struct ariadne_private *priv = netdev_priv(dev); |
| 700 | int entry = priv->cur_rx % RX_RING_SIZE; |
| 701 | int i; |
| 702 | |
| 703 | /* If we own the next entry, it's a new packet. Send it up. */ |
| 704 | while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) { |
| 705 | int status = lowb(priv->rx_ring[entry]->RMD1); |
| 706 | |
| 707 | if (status != (RF_STP|RF_ENP)) { /* There was an error. */ |
| 708 | /* There is a tricky error noted by John Murphy, |
| 709 | <murf@perftech.com> to Russ Nelson: Even with full-sized |
| 710 | buffers it's possible for a jabber packet to use two |
| 711 | buffers, with only the last correctly noting the error. */ |
| 712 | if (status & RF_ENP) |
| 713 | /* Only count a general error at the end of a packet.*/ |
| 714 | priv->stats.rx_errors++; |
| 715 | if (status & RF_FRAM) |
| 716 | priv->stats.rx_frame_errors++; |
| 717 | if (status & RF_OFLO) |
| 718 | priv->stats.rx_over_errors++; |
| 719 | if (status & RF_CRC) |
| 720 | priv->stats.rx_crc_errors++; |
| 721 | if (status & RF_BUFF) |
| 722 | priv->stats.rx_fifo_errors++; |
| 723 | priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP; |
| 724 | } else { |
| 725 | /* Malloc up new buffer, compatible with net-3. */ |
| 726 | short pkt_len = swapw(priv->rx_ring[entry]->RMD3); |
| 727 | struct sk_buff *skb; |
| 728 | |
| 729 | skb = dev_alloc_skb(pkt_len+2); |
| 730 | if (skb == NULL) { |
| 731 | printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n", |
| 732 | dev->name); |
| 733 | for (i = 0; i < RX_RING_SIZE; i++) |
| 734 | if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN) |
| 735 | break; |
| 736 | |
| 737 | if (i > RX_RING_SIZE-2) { |
| 738 | priv->stats.rx_dropped++; |
| 739 | priv->rx_ring[entry]->RMD1 |= RF_OWN; |
| 740 | priv->cur_rx++; |
| 741 | } |
| 742 | break; |
| 743 | } |
| 744 | |
| 745 | |
| 746 | skb->dev = dev; |
| 747 | skb_reserve(skb,2); /* 16 byte align */ |
| 748 | skb_put(skb,pkt_len); /* Make room */ |
| 749 | eth_copy_and_sum(skb, (char *)priv->rx_buff[entry], pkt_len,0); |
| 750 | skb->protocol=eth_type_trans(skb,dev); |
| 751 | #if 0 |
| 752 | printk(KERN_DEBUG "RX pkt type 0x%04x from ", |
| 753 | ((u_short *)skb->data)[6]); |
| 754 | { |
| 755 | int i; |
| 756 | u_char *ptr = &((u_char *)skb->data)[6]; |
| 757 | for (i = 0; i < 6; i++) |
| 758 | printk("%02x", ptr[i]); |
| 759 | } |
| 760 | printk(" to "); |
| 761 | { |
| 762 | int i; |
| 763 | u_char *ptr = (u_char *)skb->data; |
| 764 | for (i = 0; i < 6; i++) |
| 765 | printk("%02x", ptr[i]); |
| 766 | } |
| 767 | printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len); |
| 768 | #endif |
| 769 | |
| 770 | netif_rx(skb); |
| 771 | dev->last_rx = jiffies; |
| 772 | priv->stats.rx_packets++; |
| 773 | priv->stats.rx_bytes += pkt_len; |
| 774 | } |
| 775 | |
| 776 | priv->rx_ring[entry]->RMD1 |= RF_OWN; |
| 777 | entry = (++priv->cur_rx) % RX_RING_SIZE; |
| 778 | } |
| 779 | |
| 780 | priv->cur_rx = priv->cur_rx % RX_RING_SIZE; |
| 781 | |
| 782 | /* We should check that at least two ring entries are free. If not, |
| 783 | we should free one and mark stats->rx_dropped++. */ |
| 784 | |
| 785 | return 0; |
| 786 | } |
| 787 | |
| 788 | |
| 789 | static struct net_device_stats *ariadne_get_stats(struct net_device *dev) |
| 790 | { |
| 791 | struct ariadne_private *priv = netdev_priv(dev); |
| 792 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 793 | short saved_addr; |
| 794 | unsigned long flags; |
| 795 | |
| 796 | local_irq_save(flags); |
| 797 | saved_addr = lance->RAP; |
| 798 | lance->RAP = CSR112; /* Missed Frame Count */ |
| 799 | priv->stats.rx_missed_errors = swapw(lance->RDP); |
| 800 | lance->RAP = saved_addr; |
| 801 | local_irq_restore(flags); |
| 802 | |
| 803 | return &priv->stats; |
| 804 | } |
| 805 | |
| 806 | |
| 807 | /* Set or clear the multicast filter for this adaptor. |
| 808 | num_addrs == -1 Promiscuous mode, receive all packets |
| 809 | num_addrs == 0 Normal mode, clear multicast list |
| 810 | num_addrs > 0 Multicast mode, receive normal and MC packets, and do |
| 811 | best-effort filtering. |
| 812 | */ |
| 813 | static void set_multicast_list(struct net_device *dev) |
| 814 | { |
| 815 | volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr; |
| 816 | |
| 817 | if (!netif_running(dev)) |
| 818 | return; |
| 819 | |
| 820 | netif_stop_queue(dev); |
| 821 | |
| 822 | /* We take the simple way out and always enable promiscuous mode. */ |
| 823 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 824 | lance->RDP = STOP; /* Temporarily stop the lance. */ |
| 825 | ariadne_init_ring(dev); |
| 826 | |
| 827 | if (dev->flags & IFF_PROMISC) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | lance->RAP = CSR15; /* Mode Register */ |
| 829 | lance->RDP = PROM; /* Set promiscuous mode */ |
| 830 | } else { |
| 831 | short multicast_table[4]; |
| 832 | int num_addrs = dev->mc_count; |
| 833 | int i; |
| 834 | /* We don't use the multicast table, but rely on upper-layer filtering. */ |
| 835 | memset(multicast_table, (num_addrs == 0) ? 0 : -1, |
| 836 | sizeof(multicast_table)); |
| 837 | for (i = 0; i < 4; i++) { |
| 838 | lance->RAP = CSR8+(i<<8); /* Logical Address Filter */ |
| 839 | lance->RDP = swapw(multicast_table[i]); |
| 840 | } |
| 841 | lance->RAP = CSR15; /* Mode Register */ |
| 842 | lance->RDP = 0x0000; /* Unset promiscuous mode */ |
| 843 | } |
| 844 | |
| 845 | lance->RAP = CSR0; /* PCnet-ISA Controller Status */ |
| 846 | lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */ |
| 847 | |
| 848 | netif_wake_queue(dev); |
| 849 | } |
| 850 | |
| 851 | |
| 852 | static void __devexit ariadne_remove_one(struct zorro_dev *z) |
| 853 | { |
| 854 | struct net_device *dev = zorro_get_drvdata(z); |
| 855 | |
| 856 | unregister_netdev(dev); |
| 857 | release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960)); |
| 858 | release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE); |
| 859 | free_netdev(dev); |
| 860 | } |
| 861 | |
| 862 | static int __init ariadne_init_module(void) |
| 863 | { |
Bjorn Helgaas | 33d8675 | 2006-03-25 03:07:20 -0800 | [diff] [blame] | 864 | return zorro_register_driver(&ariadne_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | static void __exit ariadne_cleanup_module(void) |
| 868 | { |
| 869 | zorro_unregister_driver(&ariadne_driver); |
| 870 | } |
| 871 | |
| 872 | module_init(ariadne_init_module); |
| 873 | module_exit(ariadne_cleanup_module); |
| 874 | |
| 875 | MODULE_LICENSE("GPL"); |