| 1 | /* |
| 2 | * Lance ethernet driver for the MIPS processor based |
| 3 | * DECstation family |
| 4 | * |
| 5 | * |
| 6 | * adopted from sunlance.c by Richard van den Berg |
| 7 | * |
| 8 | * Copyright (C) 2002, 2003, 2005, 2006 Maciej W. Rozycki |
| 9 | * |
| 10 | * additional sources: |
| 11 | * - PMAD-AA TURBOchannel Ethernet Module Functional Specification, |
| 12 | * Revision 1.2 |
| 13 | * |
| 14 | * History: |
| 15 | * |
| 16 | * v0.001: The kernel accepts the code and it shows the hardware address. |
| 17 | * |
| 18 | * v0.002: Removed most sparc stuff, left only some module and dma stuff. |
| 19 | * |
| 20 | * v0.003: Enhanced base address calculation from proposals by |
| 21 | * Harald Koerfgen and Thomas Riemer. |
| 22 | * |
| 23 | * v0.004: lance-regs is pointing at the right addresses, added prom |
| 24 | * check. First start of address mapping and DMA. |
| 25 | * |
| 26 | * v0.005: started to play around with LANCE-DMA. This driver will not |
| 27 | * work for non IOASIC lances. HK |
| 28 | * |
| 29 | * v0.006: added pointer arrays to lance_private and setup routine for |
| 30 | * them in dec_lance_init. HK |
| 31 | * |
| 32 | * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to |
| 33 | * access the init block. This looks like one (short) word at a |
| 34 | * time, but the smallest amount the IOASIC can transfer is a |
| 35 | * (long) word. So we have a 2-2 padding here. Changed |
| 36 | * lance_init_block accordingly. The 16-16 padding for the buffers |
| 37 | * seems to be correct. HK |
| 38 | * |
| 39 | * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer |
| 40 | * |
| 41 | * v0.009: Module support fixes, multiple interfaces support, various |
| 42 | * bits. macro |
| 43 | * |
| 44 | * v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the |
| 45 | * PMAX requirement to only use halfword accesses to the |
| 46 | * buffer. macro |
| 47 | * |
| 48 | * v0.011: Converted the PMAD to the driver model. macro |
| 49 | */ |
| 50 | |
| 51 | #include <linux/crc32.h> |
| 52 | #include <linux/delay.h> |
| 53 | #include <linux/errno.h> |
| 54 | #include <linux/if_ether.h> |
| 55 | #include <linux/init.h> |
| 56 | #include <linux/kernel.h> |
| 57 | #include <linux/module.h> |
| 58 | #include <linux/netdevice.h> |
| 59 | #include <linux/etherdevice.h> |
| 60 | #include <linux/spinlock.h> |
| 61 | #include <linux/stddef.h> |
| 62 | #include <linux/string.h> |
| 63 | #include <linux/tc.h> |
| 64 | #include <linux/types.h> |
| 65 | |
| 66 | #include <asm/addrspace.h> |
| 67 | #include <asm/system.h> |
| 68 | |
| 69 | #include <asm/dec/interrupts.h> |
| 70 | #include <asm/dec/ioasic.h> |
| 71 | #include <asm/dec/ioasic_addrs.h> |
| 72 | #include <asm/dec/kn01.h> |
| 73 | #include <asm/dec/machtype.h> |
| 74 | #include <asm/dec/system.h> |
| 75 | |
| 76 | static char version[] __devinitdata = |
| 77 | "declance.c: v0.011 by Linux MIPS DECstation task force\n"; |
| 78 | |
| 79 | MODULE_AUTHOR("Linux MIPS DECstation task force"); |
| 80 | MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver"); |
| 81 | MODULE_LICENSE("GPL"); |
| 82 | |
| 83 | #define __unused __attribute__ ((unused)) |
| 84 | |
| 85 | /* |
| 86 | * card types |
| 87 | */ |
| 88 | #define ASIC_LANCE 1 |
| 89 | #define PMAD_LANCE 2 |
| 90 | #define PMAX_LANCE 3 |
| 91 | |
| 92 | |
| 93 | #define LE_CSR0 0 |
| 94 | #define LE_CSR1 1 |
| 95 | #define LE_CSR2 2 |
| 96 | #define LE_CSR3 3 |
| 97 | |
| 98 | #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */ |
| 99 | |
| 100 | #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */ |
| 101 | #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */ |
| 102 | #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */ |
| 103 | #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */ |
| 104 | #define LE_C0_MERR 0x0800 /* ME: Memory error */ |
| 105 | #define LE_C0_RINT 0x0400 /* Received interrupt */ |
| 106 | #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */ |
| 107 | #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */ |
| 108 | #define LE_C0_INTR 0x0080 /* Interrupt or error */ |
| 109 | #define LE_C0_INEA 0x0040 /* Interrupt enable */ |
| 110 | #define LE_C0_RXON 0x0020 /* Receiver on */ |
| 111 | #define LE_C0_TXON 0x0010 /* Transmitter on */ |
| 112 | #define LE_C0_TDMD 0x0008 /* Transmitter demand */ |
| 113 | #define LE_C0_STOP 0x0004 /* Stop the card */ |
| 114 | #define LE_C0_STRT 0x0002 /* Start the card */ |
| 115 | #define LE_C0_INIT 0x0001 /* Init the card */ |
| 116 | |
| 117 | #define LE_C3_BSWP 0x4 /* SWAP */ |
| 118 | #define LE_C3_ACON 0x2 /* ALE Control */ |
| 119 | #define LE_C3_BCON 0x1 /* Byte control */ |
| 120 | |
| 121 | /* Receive message descriptor 1 */ |
| 122 | #define LE_R1_OWN 0x8000 /* Who owns the entry */ |
| 123 | #define LE_R1_ERR 0x4000 /* Error: if FRA, OFL, CRC or BUF is set */ |
| 124 | #define LE_R1_FRA 0x2000 /* FRA: Frame error */ |
| 125 | #define LE_R1_OFL 0x1000 /* OFL: Frame overflow */ |
| 126 | #define LE_R1_CRC 0x0800 /* CRC error */ |
| 127 | #define LE_R1_BUF 0x0400 /* BUF: Buffer error */ |
| 128 | #define LE_R1_SOP 0x0200 /* Start of packet */ |
| 129 | #define LE_R1_EOP 0x0100 /* End of packet */ |
| 130 | #define LE_R1_POK 0x0300 /* Packet is complete: SOP + EOP */ |
| 131 | |
| 132 | /* Transmit message descriptor 1 */ |
| 133 | #define LE_T1_OWN 0x8000 /* Lance owns the packet */ |
| 134 | #define LE_T1_ERR 0x4000 /* Error summary */ |
| 135 | #define LE_T1_EMORE 0x1000 /* Error: more than one retry needed */ |
| 136 | #define LE_T1_EONE 0x0800 /* Error: one retry needed */ |
| 137 | #define LE_T1_EDEF 0x0400 /* Error: deferred */ |
| 138 | #define LE_T1_SOP 0x0200 /* Start of packet */ |
| 139 | #define LE_T1_EOP 0x0100 /* End of packet */ |
| 140 | #define LE_T1_POK 0x0300 /* Packet is complete: SOP + EOP */ |
| 141 | |
| 142 | #define LE_T3_BUF 0x8000 /* Buffer error */ |
| 143 | #define LE_T3_UFL 0x4000 /* Error underflow */ |
| 144 | #define LE_T3_LCOL 0x1000 /* Error late collision */ |
| 145 | #define LE_T3_CLOS 0x0800 /* Error carrier loss */ |
| 146 | #define LE_T3_RTY 0x0400 /* Error retry */ |
| 147 | #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */ |
| 148 | |
| 149 | /* Define: 2^4 Tx buffers and 2^4 Rx buffers */ |
| 150 | |
| 151 | #ifndef LANCE_LOG_TX_BUFFERS |
| 152 | #define LANCE_LOG_TX_BUFFERS 4 |
| 153 | #define LANCE_LOG_RX_BUFFERS 4 |
| 154 | #endif |
| 155 | |
| 156 | #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS)) |
| 157 | #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) |
| 158 | |
| 159 | #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS)) |
| 160 | #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) |
| 161 | |
| 162 | #define PKT_BUF_SZ 1536 |
| 163 | #define RX_BUFF_SIZE PKT_BUF_SZ |
| 164 | #define TX_BUFF_SIZE PKT_BUF_SZ |
| 165 | |
| 166 | #undef TEST_HITS |
| 167 | #define ZERO 0 |
| 168 | |
| 169 | /* |
| 170 | * The DS2100/3100 have a linear 64 kB buffer which supports halfword |
| 171 | * accesses only. Each halfword of the buffer is word-aligned in the |
| 172 | * CPU address space. |
| 173 | * |
| 174 | * The PMAD-AA has a 128 kB buffer on-board. |
| 175 | * |
| 176 | * The IOASIC LANCE devices use a shared memory region. This region |
| 177 | * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB |
| 178 | * boundary. The LANCE sees this as a 64 kB long continuous memory |
| 179 | * region. |
| 180 | * |
| 181 | * The LANCE's DMA address is used as an index in this buffer and DMA |
| 182 | * takes place in bursts of eight 16-bit words which are packed into |
| 183 | * four 32-bit words by the IOASIC. This leads to a strange padding: |
| 184 | * 16 bytes of valid data followed by a 16 byte gap :-(. |
| 185 | */ |
| 186 | |
| 187 | struct lance_rx_desc { |
| 188 | unsigned short rmd0; /* low address of packet */ |
| 189 | unsigned short rmd1; /* high address of packet |
| 190 | and descriptor bits */ |
| 191 | short length; /* 2s complement (negative!) |
| 192 | of buffer length */ |
| 193 | unsigned short mblength; /* actual number of bytes received */ |
| 194 | }; |
| 195 | |
| 196 | struct lance_tx_desc { |
| 197 | unsigned short tmd0; /* low address of packet */ |
| 198 | unsigned short tmd1; /* high address of packet |
| 199 | and descriptor bits */ |
| 200 | short length; /* 2s complement (negative!) |
| 201 | of buffer length */ |
| 202 | unsigned short misc; |
| 203 | }; |
| 204 | |
| 205 | |
| 206 | /* First part of the LANCE initialization block, described in databook. */ |
| 207 | struct lance_init_block { |
| 208 | unsigned short mode; /* pre-set mode (reg. 15) */ |
| 209 | |
| 210 | unsigned short phys_addr[3]; /* physical ethernet address */ |
| 211 | unsigned short filter[4]; /* multicast filter */ |
| 212 | |
| 213 | /* Receive and transmit ring base, along with extra bits. */ |
| 214 | unsigned short rx_ptr; /* receive descriptor addr */ |
| 215 | unsigned short rx_len; /* receive len and high addr */ |
| 216 | unsigned short tx_ptr; /* transmit descriptor addr */ |
| 217 | unsigned short tx_len; /* transmit len and high addr */ |
| 218 | |
| 219 | short gap[4]; |
| 220 | |
| 221 | /* The buffer descriptors */ |
| 222 | struct lance_rx_desc brx_ring[RX_RING_SIZE]; |
| 223 | struct lance_tx_desc btx_ring[TX_RING_SIZE]; |
| 224 | }; |
| 225 | |
| 226 | #define BUF_OFFSET_CPU sizeof(struct lance_init_block) |
| 227 | #define BUF_OFFSET_LNC sizeof(struct lance_init_block) |
| 228 | |
| 229 | #define shift_off(off, type) \ |
| 230 | (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off) |
| 231 | |
| 232 | #define lib_off(rt, type) \ |
| 233 | shift_off(offsetof(struct lance_init_block, rt), type) |
| 234 | |
| 235 | #define lib_ptr(ib, rt, type) \ |
| 236 | ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type))) |
| 237 | |
| 238 | #define rds_off(rt, type) \ |
| 239 | shift_off(offsetof(struct lance_rx_desc, rt), type) |
| 240 | |
| 241 | #define rds_ptr(rd, rt, type) \ |
| 242 | ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type))) |
| 243 | |
| 244 | #define tds_off(rt, type) \ |
| 245 | shift_off(offsetof(struct lance_tx_desc, rt), type) |
| 246 | |
| 247 | #define tds_ptr(td, rt, type) \ |
| 248 | ((volatile u16 *)((u8 *)(td) + tds_off(rt, type))) |
| 249 | |
| 250 | struct lance_private { |
| 251 | struct net_device *next; |
| 252 | int type; |
| 253 | int dma_irq; |
| 254 | volatile struct lance_regs *ll; |
| 255 | |
| 256 | spinlock_t lock; |
| 257 | |
| 258 | int rx_new, tx_new; |
| 259 | int rx_old, tx_old; |
| 260 | |
| 261 | unsigned short busmaster_regval; |
| 262 | |
| 263 | struct timer_list multicast_timer; |
| 264 | |
| 265 | /* Pointers to the ring buffers as seen from the CPU */ |
| 266 | char *rx_buf_ptr_cpu[RX_RING_SIZE]; |
| 267 | char *tx_buf_ptr_cpu[TX_RING_SIZE]; |
| 268 | |
| 269 | /* Pointers to the ring buffers as seen from the LANCE */ |
| 270 | uint rx_buf_ptr_lnc[RX_RING_SIZE]; |
| 271 | uint tx_buf_ptr_lnc[TX_RING_SIZE]; |
| 272 | }; |
| 273 | |
| 274 | #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\ |
| 275 | lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\ |
| 276 | lp->tx_old - lp->tx_new-1) |
| 277 | |
| 278 | /* The lance control ports are at an absolute address, machine and tc-slot |
| 279 | * dependent. |
| 280 | * DECstations do only 32-bit access and the LANCE uses 16 bit addresses, |
| 281 | * so we have to give the structure an extra member making rap pointing |
| 282 | * at the right address |
| 283 | */ |
| 284 | struct lance_regs { |
| 285 | volatile unsigned short rdp; /* register data port */ |
| 286 | unsigned short pad; |
| 287 | volatile unsigned short rap; /* register address port */ |
| 288 | }; |
| 289 | |
| 290 | int dec_lance_debug = 2; |
| 291 | |
| 292 | static struct tc_driver dec_lance_tc_driver; |
| 293 | static struct net_device *root_lance_dev; |
| 294 | |
| 295 | static inline void writereg(volatile unsigned short *regptr, short value) |
| 296 | { |
| 297 | *regptr = value; |
| 298 | iob(); |
| 299 | } |
| 300 | |
| 301 | /* Load the CSR registers */ |
| 302 | static void load_csrs(struct lance_private *lp) |
| 303 | { |
| 304 | volatile struct lance_regs *ll = lp->ll; |
| 305 | uint leptr; |
| 306 | |
| 307 | /* The address space as seen from the LANCE |
| 308 | * begins at address 0. HK |
| 309 | */ |
| 310 | leptr = 0; |
| 311 | |
| 312 | writereg(&ll->rap, LE_CSR1); |
| 313 | writereg(&ll->rdp, (leptr & 0xFFFF)); |
| 314 | writereg(&ll->rap, LE_CSR2); |
| 315 | writereg(&ll->rdp, leptr >> 16); |
| 316 | writereg(&ll->rap, LE_CSR3); |
| 317 | writereg(&ll->rdp, lp->busmaster_regval); |
| 318 | |
| 319 | /* Point back to csr0 */ |
| 320 | writereg(&ll->rap, LE_CSR0); |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * Our specialized copy routines |
| 325 | * |
| 326 | */ |
| 327 | static void cp_to_buf(const int type, void *to, const void *from, int len) |
| 328 | { |
| 329 | unsigned short *tp, *fp, clen; |
| 330 | unsigned char *rtp, *rfp; |
| 331 | |
| 332 | if (type == PMAD_LANCE) { |
| 333 | memcpy(to, from, len); |
| 334 | } else if (type == PMAX_LANCE) { |
| 335 | clen = len >> 1; |
| 336 | tp = (unsigned short *) to; |
| 337 | fp = (unsigned short *) from; |
| 338 | |
| 339 | while (clen--) { |
| 340 | *tp++ = *fp++; |
| 341 | tp++; |
| 342 | } |
| 343 | |
| 344 | clen = len & 1; |
| 345 | rtp = (unsigned char *) tp; |
| 346 | rfp = (unsigned char *) fp; |
| 347 | while (clen--) { |
| 348 | *rtp++ = *rfp++; |
| 349 | } |
| 350 | } else { |
| 351 | /* |
| 352 | * copy 16 Byte chunks |
| 353 | */ |
| 354 | clen = len >> 4; |
| 355 | tp = (unsigned short *) to; |
| 356 | fp = (unsigned short *) from; |
| 357 | while (clen--) { |
| 358 | *tp++ = *fp++; |
| 359 | *tp++ = *fp++; |
| 360 | *tp++ = *fp++; |
| 361 | *tp++ = *fp++; |
| 362 | *tp++ = *fp++; |
| 363 | *tp++ = *fp++; |
| 364 | *tp++ = *fp++; |
| 365 | *tp++ = *fp++; |
| 366 | tp += 8; |
| 367 | } |
| 368 | |
| 369 | /* |
| 370 | * do the rest, if any. |
| 371 | */ |
| 372 | clen = len & 15; |
| 373 | rtp = (unsigned char *) tp; |
| 374 | rfp = (unsigned char *) fp; |
| 375 | while (clen--) { |
| 376 | *rtp++ = *rfp++; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | iob(); |
| 381 | } |
| 382 | |
| 383 | static void cp_from_buf(const int type, void *to, const void *from, int len) |
| 384 | { |
| 385 | unsigned short *tp, *fp, clen; |
| 386 | unsigned char *rtp, *rfp; |
| 387 | |
| 388 | if (type == PMAD_LANCE) { |
| 389 | memcpy(to, from, len); |
| 390 | } else if (type == PMAX_LANCE) { |
| 391 | clen = len >> 1; |
| 392 | tp = (unsigned short *) to; |
| 393 | fp = (unsigned short *) from; |
| 394 | while (clen--) { |
| 395 | *tp++ = *fp++; |
| 396 | fp++; |
| 397 | } |
| 398 | |
| 399 | clen = len & 1; |
| 400 | |
| 401 | rtp = (unsigned char *) tp; |
| 402 | rfp = (unsigned char *) fp; |
| 403 | |
| 404 | while (clen--) { |
| 405 | *rtp++ = *rfp++; |
| 406 | } |
| 407 | } else { |
| 408 | |
| 409 | /* |
| 410 | * copy 16 Byte chunks |
| 411 | */ |
| 412 | clen = len >> 4; |
| 413 | tp = (unsigned short *) to; |
| 414 | fp = (unsigned short *) from; |
| 415 | while (clen--) { |
| 416 | *tp++ = *fp++; |
| 417 | *tp++ = *fp++; |
| 418 | *tp++ = *fp++; |
| 419 | *tp++ = *fp++; |
| 420 | *tp++ = *fp++; |
| 421 | *tp++ = *fp++; |
| 422 | *tp++ = *fp++; |
| 423 | *tp++ = *fp++; |
| 424 | fp += 8; |
| 425 | } |
| 426 | |
| 427 | /* |
| 428 | * do the rest, if any. |
| 429 | */ |
| 430 | clen = len & 15; |
| 431 | rtp = (unsigned char *) tp; |
| 432 | rfp = (unsigned char *) fp; |
| 433 | while (clen--) { |
| 434 | *rtp++ = *rfp++; |
| 435 | } |
| 436 | |
| 437 | |
| 438 | } |
| 439 | |
| 440 | } |
| 441 | |
| 442 | /* Setup the Lance Rx and Tx rings */ |
| 443 | static void lance_init_ring(struct net_device *dev) |
| 444 | { |
| 445 | struct lance_private *lp = netdev_priv(dev); |
| 446 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 447 | uint leptr; |
| 448 | int i; |
| 449 | |
| 450 | /* Lock out other processes while setting up hardware */ |
| 451 | netif_stop_queue(dev); |
| 452 | lp->rx_new = lp->tx_new = 0; |
| 453 | lp->rx_old = lp->tx_old = 0; |
| 454 | |
| 455 | /* Copy the ethernet address to the lance init block. |
| 456 | * XXX bit 0 of the physical address registers has to be zero |
| 457 | */ |
| 458 | *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) | |
| 459 | dev->dev_addr[0]; |
| 460 | *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) | |
| 461 | dev->dev_addr[2]; |
| 462 | *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) | |
| 463 | dev->dev_addr[4]; |
| 464 | /* Setup the initialization block */ |
| 465 | |
| 466 | /* Setup rx descriptor pointer */ |
| 467 | leptr = offsetof(struct lance_init_block, brx_ring); |
| 468 | *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) | |
| 469 | (leptr >> 16); |
| 470 | *lib_ptr(ib, rx_ptr, lp->type) = leptr; |
| 471 | if (ZERO) |
| 472 | printk("RX ptr: %8.8x(%8.8x)\n", |
| 473 | leptr, lib_off(brx_ring, lp->type)); |
| 474 | |
| 475 | /* Setup tx descriptor pointer */ |
| 476 | leptr = offsetof(struct lance_init_block, btx_ring); |
| 477 | *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) | |
| 478 | (leptr >> 16); |
| 479 | *lib_ptr(ib, tx_ptr, lp->type) = leptr; |
| 480 | if (ZERO) |
| 481 | printk("TX ptr: %8.8x(%8.8x)\n", |
| 482 | leptr, lib_off(btx_ring, lp->type)); |
| 483 | |
| 484 | if (ZERO) |
| 485 | printk("TX rings:\n"); |
| 486 | |
| 487 | /* Setup the Tx ring entries */ |
| 488 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 489 | leptr = lp->tx_buf_ptr_lnc[i]; |
| 490 | *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr; |
| 491 | *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) & |
| 492 | 0xff; |
| 493 | *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000; |
| 494 | /* The ones required by tmd2 */ |
| 495 | *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0; |
| 496 | if (i < 3 && ZERO) |
| 497 | printk("%d: 0x%8.8x(0x%8.8x)\n", |
| 498 | i, leptr, (uint)lp->tx_buf_ptr_cpu[i]); |
| 499 | } |
| 500 | |
| 501 | /* Setup the Rx ring entries */ |
| 502 | if (ZERO) |
| 503 | printk("RX rings:\n"); |
| 504 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 505 | leptr = lp->rx_buf_ptr_lnc[i]; |
| 506 | *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr; |
| 507 | *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) & |
| 508 | 0xff) | |
| 509 | LE_R1_OWN; |
| 510 | *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE | |
| 511 | 0xf000; |
| 512 | *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0; |
| 513 | if (i < 3 && ZERO) |
| 514 | printk("%d: 0x%8.8x(0x%8.8x)\n", |
| 515 | i, leptr, (uint)lp->rx_buf_ptr_cpu[i]); |
| 516 | } |
| 517 | iob(); |
| 518 | } |
| 519 | |
| 520 | static int init_restart_lance(struct lance_private *lp) |
| 521 | { |
| 522 | volatile struct lance_regs *ll = lp->ll; |
| 523 | int i; |
| 524 | |
| 525 | writereg(&ll->rap, LE_CSR0); |
| 526 | writereg(&ll->rdp, LE_C0_INIT); |
| 527 | |
| 528 | /* Wait for the lance to complete initialization */ |
| 529 | for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) { |
| 530 | udelay(10); |
| 531 | } |
| 532 | if ((i == 100) || (ll->rdp & LE_C0_ERR)) { |
| 533 | printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", |
| 534 | i, ll->rdp); |
| 535 | return -1; |
| 536 | } |
| 537 | if ((ll->rdp & LE_C0_ERR)) { |
| 538 | printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", |
| 539 | i, ll->rdp); |
| 540 | return -1; |
| 541 | } |
| 542 | writereg(&ll->rdp, LE_C0_IDON); |
| 543 | writereg(&ll->rdp, LE_C0_STRT); |
| 544 | writereg(&ll->rdp, LE_C0_INEA); |
| 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
| 549 | static int lance_rx(struct net_device *dev) |
| 550 | { |
| 551 | struct lance_private *lp = netdev_priv(dev); |
| 552 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 553 | volatile u16 *rd; |
| 554 | unsigned short bits; |
| 555 | int entry, len; |
| 556 | struct sk_buff *skb; |
| 557 | |
| 558 | #ifdef TEST_HITS |
| 559 | { |
| 560 | int i; |
| 561 | |
| 562 | printk("["); |
| 563 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 564 | if (i == lp->rx_new) |
| 565 | printk("%s", *lib_ptr(ib, brx_ring[i].rmd1, |
| 566 | lp->type) & |
| 567 | LE_R1_OWN ? "_" : "X"); |
| 568 | else |
| 569 | printk("%s", *lib_ptr(ib, brx_ring[i].rmd1, |
| 570 | lp->type) & |
| 571 | LE_R1_OWN ? "." : "1"); |
| 572 | } |
| 573 | printk("]"); |
| 574 | } |
| 575 | #endif |
| 576 | |
| 577 | for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type); |
| 578 | !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN); |
| 579 | rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) { |
| 580 | entry = lp->rx_new; |
| 581 | |
| 582 | /* We got an incomplete frame? */ |
| 583 | if ((bits & LE_R1_POK) != LE_R1_POK) { |
| 584 | dev->stats.rx_over_errors++; |
| 585 | dev->stats.rx_errors++; |
| 586 | } else if (bits & LE_R1_ERR) { |
| 587 | /* Count only the end frame as a rx error, |
| 588 | * not the beginning |
| 589 | */ |
| 590 | if (bits & LE_R1_BUF) |
| 591 | dev->stats.rx_fifo_errors++; |
| 592 | if (bits & LE_R1_CRC) |
| 593 | dev->stats.rx_crc_errors++; |
| 594 | if (bits & LE_R1_OFL) |
| 595 | dev->stats.rx_over_errors++; |
| 596 | if (bits & LE_R1_FRA) |
| 597 | dev->stats.rx_frame_errors++; |
| 598 | if (bits & LE_R1_EOP) |
| 599 | dev->stats.rx_errors++; |
| 600 | } else { |
| 601 | len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4; |
| 602 | skb = dev_alloc_skb(len + 2); |
| 603 | |
| 604 | if (skb == 0) { |
| 605 | printk("%s: Memory squeeze, deferring packet.\n", |
| 606 | dev->name); |
| 607 | dev->stats.rx_dropped++; |
| 608 | *rds_ptr(rd, mblength, lp->type) = 0; |
| 609 | *rds_ptr(rd, rmd1, lp->type) = |
| 610 | ((lp->rx_buf_ptr_lnc[entry] >> 16) & |
| 611 | 0xff) | LE_R1_OWN; |
| 612 | lp->rx_new = (entry + 1) & RX_RING_MOD_MASK; |
| 613 | return 0; |
| 614 | } |
| 615 | dev->stats.rx_bytes += len; |
| 616 | |
| 617 | skb_reserve(skb, 2); /* 16 byte align */ |
| 618 | skb_put(skb, len); /* make room */ |
| 619 | |
| 620 | cp_from_buf(lp->type, skb->data, |
| 621 | (char *)lp->rx_buf_ptr_cpu[entry], len); |
| 622 | |
| 623 | skb->protocol = eth_type_trans(skb, dev); |
| 624 | netif_rx(skb); |
| 625 | dev->stats.rx_packets++; |
| 626 | } |
| 627 | |
| 628 | /* Return the packet to the pool */ |
| 629 | *rds_ptr(rd, mblength, lp->type) = 0; |
| 630 | *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000; |
| 631 | *rds_ptr(rd, rmd1, lp->type) = |
| 632 | ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN; |
| 633 | lp->rx_new = (entry + 1) & RX_RING_MOD_MASK; |
| 634 | } |
| 635 | return 0; |
| 636 | } |
| 637 | |
| 638 | static void lance_tx(struct net_device *dev) |
| 639 | { |
| 640 | struct lance_private *lp = netdev_priv(dev); |
| 641 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 642 | volatile struct lance_regs *ll = lp->ll; |
| 643 | volatile u16 *td; |
| 644 | int i, j; |
| 645 | int status; |
| 646 | |
| 647 | j = lp->tx_old; |
| 648 | |
| 649 | spin_lock(&lp->lock); |
| 650 | |
| 651 | for (i = j; i != lp->tx_new; i = j) { |
| 652 | td = lib_ptr(ib, btx_ring[i], lp->type); |
| 653 | /* If we hit a packet not owned by us, stop */ |
| 654 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN) |
| 655 | break; |
| 656 | |
| 657 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) { |
| 658 | status = *tds_ptr(td, misc, lp->type); |
| 659 | |
| 660 | dev->stats.tx_errors++; |
| 661 | if (status & LE_T3_RTY) |
| 662 | dev->stats.tx_aborted_errors++; |
| 663 | if (status & LE_T3_LCOL) |
| 664 | dev->stats.tx_window_errors++; |
| 665 | |
| 666 | if (status & LE_T3_CLOS) { |
| 667 | dev->stats.tx_carrier_errors++; |
| 668 | printk("%s: Carrier Lost\n", dev->name); |
| 669 | /* Stop the lance */ |
| 670 | writereg(&ll->rap, LE_CSR0); |
| 671 | writereg(&ll->rdp, LE_C0_STOP); |
| 672 | lance_init_ring(dev); |
| 673 | load_csrs(lp); |
| 674 | init_restart_lance(lp); |
| 675 | goto out; |
| 676 | } |
| 677 | /* Buffer errors and underflows turn off the |
| 678 | * transmitter, restart the adapter. |
| 679 | */ |
| 680 | if (status & (LE_T3_BUF | LE_T3_UFL)) { |
| 681 | dev->stats.tx_fifo_errors++; |
| 682 | |
| 683 | printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n", |
| 684 | dev->name); |
| 685 | /* Stop the lance */ |
| 686 | writereg(&ll->rap, LE_CSR0); |
| 687 | writereg(&ll->rdp, LE_C0_STOP); |
| 688 | lance_init_ring(dev); |
| 689 | load_csrs(lp); |
| 690 | init_restart_lance(lp); |
| 691 | goto out; |
| 692 | } |
| 693 | } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) == |
| 694 | LE_T1_POK) { |
| 695 | /* |
| 696 | * So we don't count the packet more than once. |
| 697 | */ |
| 698 | *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK); |
| 699 | |
| 700 | /* One collision before packet was sent. */ |
| 701 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE) |
| 702 | dev->stats.collisions++; |
| 703 | |
| 704 | /* More than one collision, be optimistic. */ |
| 705 | if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE) |
| 706 | dev->stats.collisions += 2; |
| 707 | |
| 708 | dev->stats.tx_packets++; |
| 709 | } |
| 710 | j = (j + 1) & TX_RING_MOD_MASK; |
| 711 | } |
| 712 | lp->tx_old = j; |
| 713 | out: |
| 714 | if (netif_queue_stopped(dev) && |
| 715 | TX_BUFFS_AVAIL > 0) |
| 716 | netif_wake_queue(dev); |
| 717 | |
| 718 | spin_unlock(&lp->lock); |
| 719 | } |
| 720 | |
| 721 | static irqreturn_t lance_dma_merr_int(int irq, void *dev_id) |
| 722 | { |
| 723 | struct net_device *dev = dev_id; |
| 724 | |
| 725 | printk(KERN_ERR "%s: DMA error\n", dev->name); |
| 726 | return IRQ_HANDLED; |
| 727 | } |
| 728 | |
| 729 | static irqreturn_t lance_interrupt(int irq, void *dev_id) |
| 730 | { |
| 731 | struct net_device *dev = dev_id; |
| 732 | struct lance_private *lp = netdev_priv(dev); |
| 733 | volatile struct lance_regs *ll = lp->ll; |
| 734 | int csr0; |
| 735 | |
| 736 | writereg(&ll->rap, LE_CSR0); |
| 737 | csr0 = ll->rdp; |
| 738 | |
| 739 | /* Acknowledge all the interrupt sources ASAP */ |
| 740 | writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT)); |
| 741 | |
| 742 | if ((csr0 & LE_C0_ERR)) { |
| 743 | /* Clear the error condition */ |
| 744 | writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | |
| 745 | LE_C0_CERR | LE_C0_MERR); |
| 746 | } |
| 747 | if (csr0 & LE_C0_RINT) |
| 748 | lance_rx(dev); |
| 749 | |
| 750 | if (csr0 & LE_C0_TINT) |
| 751 | lance_tx(dev); |
| 752 | |
| 753 | if (csr0 & LE_C0_BABL) |
| 754 | dev->stats.tx_errors++; |
| 755 | |
| 756 | if (csr0 & LE_C0_MISS) |
| 757 | dev->stats.rx_errors++; |
| 758 | |
| 759 | if (csr0 & LE_C0_MERR) { |
| 760 | printk("%s: Memory error, status %04x\n", dev->name, csr0); |
| 761 | |
| 762 | writereg(&ll->rdp, LE_C0_STOP); |
| 763 | |
| 764 | lance_init_ring(dev); |
| 765 | load_csrs(lp); |
| 766 | init_restart_lance(lp); |
| 767 | netif_wake_queue(dev); |
| 768 | } |
| 769 | |
| 770 | writereg(&ll->rdp, LE_C0_INEA); |
| 771 | writereg(&ll->rdp, LE_C0_INEA); |
| 772 | return IRQ_HANDLED; |
| 773 | } |
| 774 | |
| 775 | static int lance_open(struct net_device *dev) |
| 776 | { |
| 777 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 778 | struct lance_private *lp = netdev_priv(dev); |
| 779 | volatile struct lance_regs *ll = lp->ll; |
| 780 | int status = 0; |
| 781 | |
| 782 | /* Stop the Lance */ |
| 783 | writereg(&ll->rap, LE_CSR0); |
| 784 | writereg(&ll->rdp, LE_C0_STOP); |
| 785 | |
| 786 | /* Set mode and clear multicast filter only at device open, |
| 787 | * so that lance_init_ring() called at any error will not |
| 788 | * forget multicast filters. |
| 789 | * |
| 790 | * BTW it is common bug in all lance drivers! --ANK |
| 791 | */ |
| 792 | *lib_ptr(ib, mode, lp->type) = 0; |
| 793 | *lib_ptr(ib, filter[0], lp->type) = 0; |
| 794 | *lib_ptr(ib, filter[1], lp->type) = 0; |
| 795 | *lib_ptr(ib, filter[2], lp->type) = 0; |
| 796 | *lib_ptr(ib, filter[3], lp->type) = 0; |
| 797 | |
| 798 | lance_init_ring(dev); |
| 799 | load_csrs(lp); |
| 800 | |
| 801 | netif_start_queue(dev); |
| 802 | |
| 803 | /* Associate IRQ with lance_interrupt */ |
| 804 | if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) { |
| 805 | printk("%s: Can't get IRQ %d\n", dev->name, dev->irq); |
| 806 | return -EAGAIN; |
| 807 | } |
| 808 | if (lp->dma_irq >= 0) { |
| 809 | unsigned long flags; |
| 810 | |
| 811 | if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0, |
| 812 | "lance error", dev)) { |
| 813 | free_irq(dev->irq, dev); |
| 814 | printk("%s: Can't get DMA IRQ %d\n", dev->name, |
| 815 | lp->dma_irq); |
| 816 | return -EAGAIN; |
| 817 | } |
| 818 | |
| 819 | spin_lock_irqsave(&ioasic_ssr_lock, flags); |
| 820 | |
| 821 | fast_mb(); |
| 822 | /* Enable I/O ASIC LANCE DMA. */ |
| 823 | ioasic_write(IO_REG_SSR, |
| 824 | ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN); |
| 825 | |
| 826 | fast_mb(); |
| 827 | spin_unlock_irqrestore(&ioasic_ssr_lock, flags); |
| 828 | } |
| 829 | |
| 830 | status = init_restart_lance(lp); |
| 831 | return status; |
| 832 | } |
| 833 | |
| 834 | static int lance_close(struct net_device *dev) |
| 835 | { |
| 836 | struct lance_private *lp = netdev_priv(dev); |
| 837 | volatile struct lance_regs *ll = lp->ll; |
| 838 | |
| 839 | netif_stop_queue(dev); |
| 840 | del_timer_sync(&lp->multicast_timer); |
| 841 | |
| 842 | /* Stop the card */ |
| 843 | writereg(&ll->rap, LE_CSR0); |
| 844 | writereg(&ll->rdp, LE_C0_STOP); |
| 845 | |
| 846 | if (lp->dma_irq >= 0) { |
| 847 | unsigned long flags; |
| 848 | |
| 849 | spin_lock_irqsave(&ioasic_ssr_lock, flags); |
| 850 | |
| 851 | fast_mb(); |
| 852 | /* Disable I/O ASIC LANCE DMA. */ |
| 853 | ioasic_write(IO_REG_SSR, |
| 854 | ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN); |
| 855 | |
| 856 | fast_iob(); |
| 857 | spin_unlock_irqrestore(&ioasic_ssr_lock, flags); |
| 858 | |
| 859 | free_irq(lp->dma_irq, dev); |
| 860 | } |
| 861 | free_irq(dev->irq, dev); |
| 862 | return 0; |
| 863 | } |
| 864 | |
| 865 | static inline int lance_reset(struct net_device *dev) |
| 866 | { |
| 867 | struct lance_private *lp = netdev_priv(dev); |
| 868 | volatile struct lance_regs *ll = lp->ll; |
| 869 | int status; |
| 870 | |
| 871 | /* Stop the lance */ |
| 872 | writereg(&ll->rap, LE_CSR0); |
| 873 | writereg(&ll->rdp, LE_C0_STOP); |
| 874 | |
| 875 | lance_init_ring(dev); |
| 876 | load_csrs(lp); |
| 877 | dev->trans_start = jiffies; |
| 878 | status = init_restart_lance(lp); |
| 879 | return status; |
| 880 | } |
| 881 | |
| 882 | static void lance_tx_timeout(struct net_device *dev) |
| 883 | { |
| 884 | struct lance_private *lp = netdev_priv(dev); |
| 885 | volatile struct lance_regs *ll = lp->ll; |
| 886 | |
| 887 | printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n", |
| 888 | dev->name, ll->rdp); |
| 889 | lance_reset(dev); |
| 890 | netif_wake_queue(dev); |
| 891 | } |
| 892 | |
| 893 | static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 894 | { |
| 895 | struct lance_private *lp = netdev_priv(dev); |
| 896 | volatile struct lance_regs *ll = lp->ll; |
| 897 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 898 | unsigned long flags; |
| 899 | int entry, len; |
| 900 | |
| 901 | len = skb->len; |
| 902 | |
| 903 | if (len < ETH_ZLEN) { |
| 904 | if (skb_padto(skb, ETH_ZLEN)) |
| 905 | return NETDEV_TX_OK; |
| 906 | len = ETH_ZLEN; |
| 907 | } |
| 908 | |
| 909 | dev->stats.tx_bytes += len; |
| 910 | |
| 911 | spin_lock_irqsave(&lp->lock, flags); |
| 912 | |
| 913 | entry = lp->tx_new; |
| 914 | *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len); |
| 915 | *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0; |
| 916 | |
| 917 | cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data, len); |
| 918 | |
| 919 | /* Now, give the packet to the lance */ |
| 920 | *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) = |
| 921 | ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) | |
| 922 | (LE_T1_POK | LE_T1_OWN); |
| 923 | lp->tx_new = (entry + 1) & TX_RING_MOD_MASK; |
| 924 | |
| 925 | if (TX_BUFFS_AVAIL <= 0) |
| 926 | netif_stop_queue(dev); |
| 927 | |
| 928 | /* Kick the lance: transmit now */ |
| 929 | writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD); |
| 930 | |
| 931 | spin_unlock_irqrestore(&lp->lock, flags); |
| 932 | |
| 933 | dev->trans_start = jiffies; |
| 934 | dev_kfree_skb(skb); |
| 935 | |
| 936 | return NETDEV_TX_OK; |
| 937 | } |
| 938 | |
| 939 | static void lance_load_multicast(struct net_device *dev) |
| 940 | { |
| 941 | struct lance_private *lp = netdev_priv(dev); |
| 942 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 943 | struct dev_mc_list *dmi = dev->mc_list; |
| 944 | char *addrs; |
| 945 | int i; |
| 946 | u32 crc; |
| 947 | |
| 948 | /* set all multicast bits */ |
| 949 | if (dev->flags & IFF_ALLMULTI) { |
| 950 | *lib_ptr(ib, filter[0], lp->type) = 0xffff; |
| 951 | *lib_ptr(ib, filter[1], lp->type) = 0xffff; |
| 952 | *lib_ptr(ib, filter[2], lp->type) = 0xffff; |
| 953 | *lib_ptr(ib, filter[3], lp->type) = 0xffff; |
| 954 | return; |
| 955 | } |
| 956 | /* clear the multicast filter */ |
| 957 | *lib_ptr(ib, filter[0], lp->type) = 0; |
| 958 | *lib_ptr(ib, filter[1], lp->type) = 0; |
| 959 | *lib_ptr(ib, filter[2], lp->type) = 0; |
| 960 | *lib_ptr(ib, filter[3], lp->type) = 0; |
| 961 | |
| 962 | /* Add addresses */ |
| 963 | for (i = 0; i < dev->mc_count; i++) { |
| 964 | addrs = dmi->dmi_addr; |
| 965 | dmi = dmi->next; |
| 966 | |
| 967 | /* multicast address? */ |
| 968 | if (!(*addrs & 1)) |
| 969 | continue; |
| 970 | |
| 971 | crc = ether_crc_le(ETH_ALEN, addrs); |
| 972 | crc = crc >> 26; |
| 973 | *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf); |
| 974 | } |
| 975 | return; |
| 976 | } |
| 977 | |
| 978 | static void lance_set_multicast(struct net_device *dev) |
| 979 | { |
| 980 | struct lance_private *lp = netdev_priv(dev); |
| 981 | volatile u16 *ib = (volatile u16 *)dev->mem_start; |
| 982 | volatile struct lance_regs *ll = lp->ll; |
| 983 | |
| 984 | if (!netif_running(dev)) |
| 985 | return; |
| 986 | |
| 987 | if (lp->tx_old != lp->tx_new) { |
| 988 | mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100); |
| 989 | netif_wake_queue(dev); |
| 990 | return; |
| 991 | } |
| 992 | |
| 993 | netif_stop_queue(dev); |
| 994 | |
| 995 | writereg(&ll->rap, LE_CSR0); |
| 996 | writereg(&ll->rdp, LE_C0_STOP); |
| 997 | |
| 998 | lance_init_ring(dev); |
| 999 | |
| 1000 | if (dev->flags & IFF_PROMISC) { |
| 1001 | *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM; |
| 1002 | } else { |
| 1003 | *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM; |
| 1004 | lance_load_multicast(dev); |
| 1005 | } |
| 1006 | load_csrs(lp); |
| 1007 | init_restart_lance(lp); |
| 1008 | netif_wake_queue(dev); |
| 1009 | } |
| 1010 | |
| 1011 | static void lance_set_multicast_retry(unsigned long _opaque) |
| 1012 | { |
| 1013 | struct net_device *dev = (struct net_device *) _opaque; |
| 1014 | |
| 1015 | lance_set_multicast(dev); |
| 1016 | } |
| 1017 | |
| 1018 | static const struct net_device_ops lance_netdev_ops = { |
| 1019 | .ndo_open = lance_open, |
| 1020 | .ndo_stop = lance_close, |
| 1021 | .ndo_start_xmit = lance_start_xmit, |
| 1022 | .ndo_tx_timeout = lance_tx_timeout, |
| 1023 | .ndo_set_multicast_list = lance_set_multicast, |
| 1024 | .ndo_change_mtu = eth_change_mtu, |
| 1025 | .ndo_validate_addr = eth_validate_addr, |
| 1026 | .ndo_set_mac_address = eth_mac_addr, |
| 1027 | }; |
| 1028 | |
| 1029 | static int __init dec_lance_probe(struct device *bdev, const int type) |
| 1030 | { |
| 1031 | static unsigned version_printed; |
| 1032 | static const char fmt[] = "declance%d"; |
| 1033 | char name[10]; |
| 1034 | struct net_device *dev; |
| 1035 | struct lance_private *lp; |
| 1036 | volatile struct lance_regs *ll; |
| 1037 | resource_size_t start = 0, len = 0; |
| 1038 | int i, ret; |
| 1039 | unsigned long esar_base; |
| 1040 | unsigned char *esar; |
| 1041 | |
| 1042 | if (dec_lance_debug && version_printed++ == 0) |
| 1043 | printk(version); |
| 1044 | |
| 1045 | if (bdev) |
| 1046 | snprintf(name, sizeof(name), "%s", dev_name(bdev)); |
| 1047 | else { |
| 1048 | i = 0; |
| 1049 | dev = root_lance_dev; |
| 1050 | while (dev) { |
| 1051 | i++; |
| 1052 | lp = netdev_priv(dev); |
| 1053 | dev = lp->next; |
| 1054 | } |
| 1055 | snprintf(name, sizeof(name), fmt, i); |
| 1056 | } |
| 1057 | |
| 1058 | dev = alloc_etherdev(sizeof(struct lance_private)); |
| 1059 | if (!dev) { |
| 1060 | printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n", |
| 1061 | name); |
| 1062 | ret = -ENOMEM; |
| 1063 | goto err_out; |
| 1064 | } |
| 1065 | |
| 1066 | /* |
| 1067 | * alloc_etherdev ensures the data structures used by the LANCE |
| 1068 | * are aligned. |
| 1069 | */ |
| 1070 | lp = netdev_priv(dev); |
| 1071 | spin_lock_init(&lp->lock); |
| 1072 | |
| 1073 | lp->type = type; |
| 1074 | switch (type) { |
| 1075 | case ASIC_LANCE: |
| 1076 | dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE); |
| 1077 | |
| 1078 | /* buffer space for the on-board LANCE shared memory */ |
| 1079 | /* |
| 1080 | * FIXME: ugly hack! |
| 1081 | */ |
| 1082 | dev->mem_start = CKSEG1ADDR(0x00020000); |
| 1083 | dev->mem_end = dev->mem_start + 0x00020000; |
| 1084 | dev->irq = dec_interrupt[DEC_IRQ_LANCE]; |
| 1085 | esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR); |
| 1086 | |
| 1087 | /* Workaround crash with booting KN04 2.1k from Disk */ |
| 1088 | memset((void *)dev->mem_start, 0, |
| 1089 | dev->mem_end - dev->mem_start); |
| 1090 | |
| 1091 | /* |
| 1092 | * setup the pointer arrays, this sucks [tm] :-( |
| 1093 | */ |
| 1094 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1095 | lp->rx_buf_ptr_cpu[i] = |
| 1096 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
| 1097 | 2 * i * RX_BUFF_SIZE); |
| 1098 | lp->rx_buf_ptr_lnc[i] = |
| 1099 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
| 1100 | } |
| 1101 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1102 | lp->tx_buf_ptr_cpu[i] = |
| 1103 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
| 1104 | 2 * RX_RING_SIZE * RX_BUFF_SIZE + |
| 1105 | 2 * i * TX_BUFF_SIZE); |
| 1106 | lp->tx_buf_ptr_lnc[i] = |
| 1107 | (BUF_OFFSET_LNC + |
| 1108 | RX_RING_SIZE * RX_BUFF_SIZE + |
| 1109 | i * TX_BUFF_SIZE); |
| 1110 | } |
| 1111 | |
| 1112 | /* Setup I/O ASIC LANCE DMA. */ |
| 1113 | lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR]; |
| 1114 | ioasic_write(IO_REG_LANCE_DMA_P, |
| 1115 | CPHYSADDR(dev->mem_start) << 3); |
| 1116 | |
| 1117 | break; |
| 1118 | #ifdef CONFIG_TC |
| 1119 | case PMAD_LANCE: |
| 1120 | dev_set_drvdata(bdev, dev); |
| 1121 | |
| 1122 | start = to_tc_dev(bdev)->resource.start; |
| 1123 | len = to_tc_dev(bdev)->resource.end - start + 1; |
| 1124 | if (!request_mem_region(start, len, dev_name(bdev))) { |
| 1125 | printk(KERN_ERR |
| 1126 | "%s: Unable to reserve MMIO resource\n", |
| 1127 | dev_name(bdev)); |
| 1128 | ret = -EBUSY; |
| 1129 | goto err_out_dev; |
| 1130 | } |
| 1131 | |
| 1132 | dev->mem_start = CKSEG1ADDR(start); |
| 1133 | dev->mem_end = dev->mem_start + 0x100000; |
| 1134 | dev->base_addr = dev->mem_start + 0x100000; |
| 1135 | dev->irq = to_tc_dev(bdev)->interrupt; |
| 1136 | esar_base = dev->mem_start + 0x1c0002; |
| 1137 | lp->dma_irq = -1; |
| 1138 | |
| 1139 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1140 | lp->rx_buf_ptr_cpu[i] = |
| 1141 | (char *)(dev->mem_start + BUF_OFFSET_CPU + |
| 1142 | i * RX_BUFF_SIZE); |
| 1143 | lp->rx_buf_ptr_lnc[i] = |
| 1144 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
| 1145 | } |
| 1146 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1147 | lp->tx_buf_ptr_cpu[i] = |
| 1148 | (char *)(dev->mem_start + BUF_OFFSET_CPU + |
| 1149 | RX_RING_SIZE * RX_BUFF_SIZE + |
| 1150 | i * TX_BUFF_SIZE); |
| 1151 | lp->tx_buf_ptr_lnc[i] = |
| 1152 | (BUF_OFFSET_LNC + |
| 1153 | RX_RING_SIZE * RX_BUFF_SIZE + |
| 1154 | i * TX_BUFF_SIZE); |
| 1155 | } |
| 1156 | |
| 1157 | break; |
| 1158 | #endif |
| 1159 | case PMAX_LANCE: |
| 1160 | dev->irq = dec_interrupt[DEC_IRQ_LANCE]; |
| 1161 | dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE); |
| 1162 | dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM); |
| 1163 | dev->mem_end = dev->mem_start + KN01_SLOT_SIZE; |
| 1164 | esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1); |
| 1165 | lp->dma_irq = -1; |
| 1166 | |
| 1167 | /* |
| 1168 | * setup the pointer arrays, this sucks [tm] :-( |
| 1169 | */ |
| 1170 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1171 | lp->rx_buf_ptr_cpu[i] = |
| 1172 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
| 1173 | 2 * i * RX_BUFF_SIZE); |
| 1174 | lp->rx_buf_ptr_lnc[i] = |
| 1175 | (BUF_OFFSET_LNC + i * RX_BUFF_SIZE); |
| 1176 | } |
| 1177 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1178 | lp->tx_buf_ptr_cpu[i] = |
| 1179 | (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU + |
| 1180 | 2 * RX_RING_SIZE * RX_BUFF_SIZE + |
| 1181 | 2 * i * TX_BUFF_SIZE); |
| 1182 | lp->tx_buf_ptr_lnc[i] = |
| 1183 | (BUF_OFFSET_LNC + |
| 1184 | RX_RING_SIZE * RX_BUFF_SIZE + |
| 1185 | i * TX_BUFF_SIZE); |
| 1186 | } |
| 1187 | |
| 1188 | break; |
| 1189 | |
| 1190 | default: |
| 1191 | printk(KERN_ERR "%s: declance_init called with unknown type\n", |
| 1192 | name); |
| 1193 | ret = -ENODEV; |
| 1194 | goto err_out_dev; |
| 1195 | } |
| 1196 | |
| 1197 | ll = (struct lance_regs *) dev->base_addr; |
| 1198 | esar = (unsigned char *) esar_base; |
| 1199 | |
| 1200 | /* prom checks */ |
| 1201 | /* First, check for test pattern */ |
| 1202 | if (esar[0x60] != 0xff && esar[0x64] != 0x00 && |
| 1203 | esar[0x68] != 0x55 && esar[0x6c] != 0xaa) { |
| 1204 | printk(KERN_ERR |
| 1205 | "%s: Ethernet station address prom not found!\n", |
| 1206 | name); |
| 1207 | ret = -ENODEV; |
| 1208 | goto err_out_resource; |
| 1209 | } |
| 1210 | /* Check the prom contents */ |
| 1211 | for (i = 0; i < 8; i++) { |
| 1212 | if (esar[i * 4] != esar[0x3c - i * 4] && |
| 1213 | esar[i * 4] != esar[0x40 + i * 4] && |
| 1214 | esar[0x3c - i * 4] != esar[0x40 + i * 4]) { |
| 1215 | printk(KERN_ERR "%s: Something is wrong with the " |
| 1216 | "ethernet station address prom!\n", name); |
| 1217 | ret = -ENODEV; |
| 1218 | goto err_out_resource; |
| 1219 | } |
| 1220 | } |
| 1221 | |
| 1222 | /* Copy the ethernet address to the device structure, later to the |
| 1223 | * lance initialization block so the lance gets it every time it's |
| 1224 | * (re)initialized. |
| 1225 | */ |
| 1226 | switch (type) { |
| 1227 | case ASIC_LANCE: |
| 1228 | printk("%s: IOASIC onboard LANCE", name); |
| 1229 | break; |
| 1230 | case PMAD_LANCE: |
| 1231 | printk("%s: PMAD-AA", name); |
| 1232 | break; |
| 1233 | case PMAX_LANCE: |
| 1234 | printk("%s: PMAX onboard LANCE", name); |
| 1235 | break; |
| 1236 | } |
| 1237 | for (i = 0; i < 6; i++) |
| 1238 | dev->dev_addr[i] = esar[i * 4]; |
| 1239 | |
| 1240 | printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq); |
| 1241 | |
| 1242 | dev->netdev_ops = &lance_netdev_ops; |
| 1243 | dev->watchdog_timeo = 5*HZ; |
| 1244 | |
| 1245 | /* lp->ll is the location of the registers for lance card */ |
| 1246 | lp->ll = ll; |
| 1247 | |
| 1248 | /* busmaster_regval (CSR3) should be zero according to the PMAD-AA |
| 1249 | * specification. |
| 1250 | */ |
| 1251 | lp->busmaster_regval = 0; |
| 1252 | |
| 1253 | dev->dma = 0; |
| 1254 | |
| 1255 | /* We cannot sleep if the chip is busy during a |
| 1256 | * multicast list update event, because such events |
| 1257 | * can occur from interrupts (ex. IPv6). So we |
| 1258 | * use a timer to try again later when necessary. -DaveM |
| 1259 | */ |
| 1260 | init_timer(&lp->multicast_timer); |
| 1261 | lp->multicast_timer.data = (unsigned long) dev; |
| 1262 | lp->multicast_timer.function = &lance_set_multicast_retry; |
| 1263 | |
| 1264 | ret = register_netdev(dev); |
| 1265 | if (ret) { |
| 1266 | printk(KERN_ERR |
| 1267 | "%s: Unable to register netdev, aborting.\n", name); |
| 1268 | goto err_out_resource; |
| 1269 | } |
| 1270 | |
| 1271 | if (!bdev) { |
| 1272 | lp->next = root_lance_dev; |
| 1273 | root_lance_dev = dev; |
| 1274 | } |
| 1275 | |
| 1276 | printk("%s: registered as %s.\n", name, dev->name); |
| 1277 | return 0; |
| 1278 | |
| 1279 | err_out_resource: |
| 1280 | if (bdev) |
| 1281 | release_mem_region(start, len); |
| 1282 | |
| 1283 | err_out_dev: |
| 1284 | free_netdev(dev); |
| 1285 | |
| 1286 | err_out: |
| 1287 | return ret; |
| 1288 | } |
| 1289 | |
| 1290 | static void __exit dec_lance_remove(struct device *bdev) |
| 1291 | { |
| 1292 | struct net_device *dev = dev_get_drvdata(bdev); |
| 1293 | resource_size_t start, len; |
| 1294 | |
| 1295 | unregister_netdev(dev); |
| 1296 | start = to_tc_dev(bdev)->resource.start; |
| 1297 | len = to_tc_dev(bdev)->resource.end - start + 1; |
| 1298 | release_mem_region(start, len); |
| 1299 | free_netdev(dev); |
| 1300 | } |
| 1301 | |
| 1302 | /* Find all the lance cards on the system and initialize them */ |
| 1303 | static int __init dec_lance_platform_probe(void) |
| 1304 | { |
| 1305 | int count = 0; |
| 1306 | |
| 1307 | if (dec_interrupt[DEC_IRQ_LANCE] >= 0) { |
| 1308 | if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) { |
| 1309 | if (dec_lance_probe(NULL, ASIC_LANCE) >= 0) |
| 1310 | count++; |
| 1311 | } else if (!TURBOCHANNEL) { |
| 1312 | if (dec_lance_probe(NULL, PMAX_LANCE) >= 0) |
| 1313 | count++; |
| 1314 | } |
| 1315 | } |
| 1316 | |
| 1317 | return (count > 0) ? 0 : -ENODEV; |
| 1318 | } |
| 1319 | |
| 1320 | static void __exit dec_lance_platform_remove(void) |
| 1321 | { |
| 1322 | while (root_lance_dev) { |
| 1323 | struct net_device *dev = root_lance_dev; |
| 1324 | struct lance_private *lp = netdev_priv(dev); |
| 1325 | |
| 1326 | unregister_netdev(dev); |
| 1327 | root_lance_dev = lp->next; |
| 1328 | free_netdev(dev); |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | #ifdef CONFIG_TC |
| 1333 | static int __init dec_lance_tc_probe(struct device *dev); |
| 1334 | static int __exit dec_lance_tc_remove(struct device *dev); |
| 1335 | |
| 1336 | static const struct tc_device_id dec_lance_tc_table[] = { |
| 1337 | { "DEC ", "PMAD-AA " }, |
| 1338 | { } |
| 1339 | }; |
| 1340 | MODULE_DEVICE_TABLE(tc, dec_lance_tc_table); |
| 1341 | |
| 1342 | static struct tc_driver dec_lance_tc_driver = { |
| 1343 | .id_table = dec_lance_tc_table, |
| 1344 | .driver = { |
| 1345 | .name = "declance", |
| 1346 | .bus = &tc_bus_type, |
| 1347 | .probe = dec_lance_tc_probe, |
| 1348 | .remove = __exit_p(dec_lance_tc_remove), |
| 1349 | }, |
| 1350 | }; |
| 1351 | |
| 1352 | static int __init dec_lance_tc_probe(struct device *dev) |
| 1353 | { |
| 1354 | int status = dec_lance_probe(dev, PMAD_LANCE); |
| 1355 | if (!status) |
| 1356 | get_device(dev); |
| 1357 | return status; |
| 1358 | } |
| 1359 | |
| 1360 | static int __exit dec_lance_tc_remove(struct device *dev) |
| 1361 | { |
| 1362 | put_device(dev); |
| 1363 | dec_lance_remove(dev); |
| 1364 | return 0; |
| 1365 | } |
| 1366 | #endif |
| 1367 | |
| 1368 | static int __init dec_lance_init(void) |
| 1369 | { |
| 1370 | int status; |
| 1371 | |
| 1372 | status = tc_register_driver(&dec_lance_tc_driver); |
| 1373 | if (!status) |
| 1374 | dec_lance_platform_probe(); |
| 1375 | return status; |
| 1376 | } |
| 1377 | |
| 1378 | static void __exit dec_lance_exit(void) |
| 1379 | { |
| 1380 | dec_lance_platform_remove(); |
| 1381 | tc_unregister_driver(&dec_lance_tc_driver); |
| 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | module_init(dec_lance_init); |
| 1386 | module_exit(dec_lance_exit); |