1 // SPDX-License-Identifier: GPL-2.0-only 2 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $ 3 * lance.c: Linux/Sparc/Lance driver 4 * 5 * Written 1995, 1996 by Miguel de Icaza 6 * Sources: 7 * The Linux depca driver 8 * The Linux lance driver. 9 * The Linux skeleton driver. 10 * The NetBSD Sparc/Lance driver. 11 * Theo de Raadt (deraadt@openbsd.org) 12 * NCR92C990 Lan Controller manual 13 * 14 * 1.4: 15 * Added support to run with a ledma on the Sun4m 16 * 17 * 1.5: 18 * Added multiple card detection. 19 * 20 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost 21 * (ecd@skynet.be) 22 * 23 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost 24 * (ecd@skynet.be) 25 * 26 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller 27 * (davem@caip.rutgers.edu) 28 * 29 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as 30 * this disables auto carrier detection on sun4m. Eddie C. Dost 31 * (ecd@skynet.be) 32 * 33 * 1.7: 34 * 6/26/96: Bug fix for multiple ledmas, miguel. 35 * 36 * 1.8: 37 * Stole multicast code from depca.c, fixed lance_tx. 38 * 39 * 1.9: 40 * 8/21/96: Fixed the multicast code (Pedro Roque) 41 * 42 * 8/28/96: Send fake packet in lance_open() if auto_select is true, 43 * so we can detect the carrier loss condition in time. 44 * Eddie C. Dost (ecd@skynet.be) 45 * 46 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an 47 * MNA trap during chksum_partial_copy(). (ecd@skynet.be) 48 * 49 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be) 50 * 51 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets. 52 * This was the sun4c killer. Shit, stupid bug. 53 * (ecd@skynet.be) 54 * 55 * 1.10: 56 * 1/26/97: Modularize driver. (ecd@skynet.be) 57 * 58 * 1.11: 59 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz) 60 * 61 * 1.12: 62 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem. 63 * Anton Blanchard (anton@progsoc.uts.edu.au) 64 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces. 65 * David S. Miller (davem@redhat.com) 66 * 2.01: 67 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com) 68 * 69 */ 70 71 #undef DEBUG_DRIVER 72 73 static char lancestr[] = "LANCE"; 74 75 #include <linux/module.h> 76 #include <linux/kernel.h> 77 #include <linux/types.h> 78 #include <linux/fcntl.h> 79 #include <linux/interrupt.h> 80 #include <linux/ioport.h> 81 #include <linux/in.h> 82 #include <linux/string.h> 83 #include <linux/delay.h> 84 #include <linux/crc32.h> 85 #include <linux/errno.h> 86 #include <linux/socket.h> /* Used for the temporal inet entries and routing */ 87 #include <linux/route.h> 88 #include <linux/netdevice.h> 89 #include <linux/etherdevice.h> 90 #include <linux/skbuff.h> 91 #include <linux/ethtool.h> 92 #include <linux/bitops.h> 93 #include <linux/dma-mapping.h> 94 #include <linux/of.h> 95 #include <linux/of_device.h> 96 #include <linux/gfp.h> 97 #include <linux/pgtable.h> 98 99 #include <asm/io.h> 100 #include <asm/dma.h> 101 #include <asm/byteorder.h> /* Used by the checksum routines */ 102 #include <asm/idprom.h> 103 #include <asm/prom.h> 104 #include <asm/auxio.h> /* For tpe-link-test? setting */ 105 #include <asm/irq.h> 106 107 #define DRV_NAME "sunlance" 108 #define DRV_RELDATE "8/24/03" 109 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)" 110 111 MODULE_AUTHOR(DRV_AUTHOR); 112 MODULE_DESCRIPTION("Sun Lance ethernet driver"); 113 MODULE_LICENSE("GPL"); 114 115 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */ 116 #ifndef LANCE_LOG_TX_BUFFERS 117 #define LANCE_LOG_TX_BUFFERS 4 118 #define LANCE_LOG_RX_BUFFERS 4 119 #endif 120 121 #define LE_CSR0 0 122 #define LE_CSR1 1 123 #define LE_CSR2 2 124 #define LE_CSR3 3 125 126 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */ 127 128 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */ 129 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */ 130 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */ 131 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */ 132 #define LE_C0_MERR 0x0800 /* ME: Memory error */ 133 #define LE_C0_RINT 0x0400 /* Received interrupt */ 134 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */ 135 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */ 136 #define LE_C0_INTR 0x0080 /* Interrupt or error */ 137 #define LE_C0_INEA 0x0040 /* Interrupt enable */ 138 #define LE_C0_RXON 0x0020 /* Receiver on */ 139 #define LE_C0_TXON 0x0010 /* Transmitter on */ 140 #define LE_C0_TDMD 0x0008 /* Transmitter demand */ 141 #define LE_C0_STOP 0x0004 /* Stop the card */ 142 #define LE_C0_STRT 0x0002 /* Start the card */ 143 #define LE_C0_INIT 0x0001 /* Init the card */ 144 145 #define LE_C3_BSWP 0x4 /* SWAP */ 146 #define LE_C3_ACON 0x2 /* ALE Control */ 147 #define LE_C3_BCON 0x1 /* Byte control */ 148 149 /* Receive message descriptor 1 */ 150 #define LE_R1_OWN 0x80 /* Who owns the entry */ 151 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */ 152 #define LE_R1_FRA 0x20 /* FRA: Frame error */ 153 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */ 154 #define LE_R1_CRC 0x08 /* CRC error */ 155 #define LE_R1_BUF 0x04 /* BUF: Buffer error */ 156 #define LE_R1_SOP 0x02 /* Start of packet */ 157 #define LE_R1_EOP 0x01 /* End of packet */ 158 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */ 159 160 #define LE_T1_OWN 0x80 /* Lance owns the packet */ 161 #define LE_T1_ERR 0x40 /* Error summary */ 162 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */ 163 #define LE_T1_EONE 0x08 /* Error: one retry needed */ 164 #define LE_T1_EDEF 0x04 /* Error: deferred */ 165 #define LE_T1_SOP 0x02 /* Start of packet */ 166 #define LE_T1_EOP 0x01 /* End of packet */ 167 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */ 168 169 #define LE_T3_BUF 0x8000 /* Buffer error */ 170 #define LE_T3_UFL 0x4000 /* Error underflow */ 171 #define LE_T3_LCOL 0x1000 /* Error late collision */ 172 #define LE_T3_CLOS 0x0800 /* Error carrier loss */ 173 #define LE_T3_RTY 0x0400 /* Error retry */ 174 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */ 175 176 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS)) 177 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) 178 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29) 179 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK) 180 181 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS)) 182 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) 183 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29) 184 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK) 185 186 #define PKT_BUF_SZ 1544 187 #define RX_BUFF_SIZE PKT_BUF_SZ 188 #define TX_BUFF_SIZE PKT_BUF_SZ 189 190 struct lance_rx_desc { 191 u16 rmd0; /* low address of packet */ 192 u8 rmd1_bits; /* descriptor bits */ 193 u8 rmd1_hadr; /* high address of packet */ 194 s16 length; /* This length is 2s complement (negative)! 195 * Buffer length 196 */ 197 u16 mblength; /* This is the actual number of bytes received */ 198 }; 199 200 struct lance_tx_desc { 201 u16 tmd0; /* low address of packet */ 202 u8 tmd1_bits; /* descriptor bits */ 203 u8 tmd1_hadr; /* high address of packet */ 204 s16 length; /* Length is 2s complement (negative)! */ 205 u16 misc; 206 }; 207 208 /* The LANCE initialization block, described in databook. */ 209 /* On the Sparc, this block should be on a DMA region */ 210 struct lance_init_block { 211 u16 mode; /* Pre-set mode (reg. 15) */ 212 u8 phys_addr[6]; /* Physical ethernet address */ 213 u32 filter[2]; /* Multicast filter. */ 214 215 /* Receive and transmit ring base, along with extra bits. */ 216 u16 rx_ptr; /* receive descriptor addr */ 217 u16 rx_len; /* receive len and high addr */ 218 u16 tx_ptr; /* transmit descriptor addr */ 219 u16 tx_len; /* transmit len and high addr */ 220 221 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */ 222 struct lance_rx_desc brx_ring[RX_RING_SIZE]; 223 struct lance_tx_desc btx_ring[TX_RING_SIZE]; 224 225 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE]; 226 u8 pad[2]; /* align rx_buf for copy_and_sum(). */ 227 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE]; 228 }; 229 230 #define libdesc_offset(rt, elem) \ 231 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem]))))) 232 233 #define libbuff_offset(rt, elem) \ 234 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0]))))) 235 236 struct lance_private { 237 void __iomem *lregs; /* Lance RAP/RDP regs. */ 238 void __iomem *dregs; /* DMA controller regs. */ 239 struct lance_init_block __iomem *init_block_iomem; 240 struct lance_init_block *init_block_mem; 241 242 spinlock_t lock; 243 244 int rx_new, tx_new; 245 int rx_old, tx_old; 246 247 struct platform_device *ledma; /* If set this points to ledma */ 248 char tpe; /* cable-selection is TPE */ 249 char auto_select; /* cable-selection by carrier */ 250 char burst_sizes; /* ledma SBus burst sizes */ 251 char pio_buffer; /* init block in PIO space? */ 252 253 unsigned short busmaster_regval; 254 255 void (*init_ring)(struct net_device *); 256 void (*rx)(struct net_device *); 257 void (*tx)(struct net_device *); 258 259 char *name; 260 dma_addr_t init_block_dvma; 261 struct net_device *dev; /* Backpointer */ 262 struct platform_device *op; 263 struct platform_device *lebuffer; 264 struct timer_list multicast_timer; 265 }; 266 267 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\ 268 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\ 269 lp->tx_old - lp->tx_new-1) 270 271 /* Lance registers. */ 272 #define RDP 0x00UL /* register data port */ 273 #define RAP 0x02UL /* register address port */ 274 #define LANCE_REG_SIZE 0x04UL 275 276 #define STOP_LANCE(__lp) \ 277 do { void __iomem *__base = (__lp)->lregs; \ 278 sbus_writew(LE_CSR0, __base + RAP); \ 279 sbus_writew(LE_C0_STOP, __base + RDP); \ 280 } while (0) 281 282 int sparc_lance_debug = 2; 283 284 /* The Lance uses 24 bit addresses */ 285 /* On the Sun4c the DVMA will provide the remaining bytes for us */ 286 /* On the Sun4m we have to instruct the ledma to provide them */ 287 /* Even worse, on scsi/ether SBUS cards, the init block and the 288 * transmit/receive buffers are addresses as offsets from absolute 289 * zero on the lebuffer PIO area. -DaveM 290 */ 291 292 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000) 293 294 /* Load the CSR registers */ 295 static void load_csrs(struct lance_private *lp) 296 { 297 u32 leptr; 298 299 if (lp->pio_buffer) 300 leptr = 0; 301 else 302 leptr = LANCE_ADDR(lp->init_block_dvma); 303 304 sbus_writew(LE_CSR1, lp->lregs + RAP); 305 sbus_writew(leptr & 0xffff, lp->lregs + RDP); 306 sbus_writew(LE_CSR2, lp->lregs + RAP); 307 sbus_writew(leptr >> 16, lp->lregs + RDP); 308 sbus_writew(LE_CSR3, lp->lregs + RAP); 309 sbus_writew(lp->busmaster_regval, lp->lregs + RDP); 310 311 /* Point back to csr0 */ 312 sbus_writew(LE_CSR0, lp->lregs + RAP); 313 } 314 315 /* Setup the Lance Rx and Tx rings */ 316 static void lance_init_ring_dvma(struct net_device *dev) 317 { 318 struct lance_private *lp = netdev_priv(dev); 319 struct lance_init_block *ib = lp->init_block_mem; 320 dma_addr_t aib = lp->init_block_dvma; 321 __u32 leptr; 322 int i; 323 324 /* Lock out other processes while setting up hardware */ 325 netif_stop_queue(dev); 326 lp->rx_new = lp->tx_new = 0; 327 lp->rx_old = lp->tx_old = 0; 328 329 /* Copy the ethernet address to the lance init block 330 * Note that on the sparc you need to swap the ethernet address. 331 */ 332 ib->phys_addr [0] = dev->dev_addr [1]; 333 ib->phys_addr [1] = dev->dev_addr [0]; 334 ib->phys_addr [2] = dev->dev_addr [3]; 335 ib->phys_addr [3] = dev->dev_addr [2]; 336 ib->phys_addr [4] = dev->dev_addr [5]; 337 ib->phys_addr [5] = dev->dev_addr [4]; 338 339 /* Setup the Tx ring entries */ 340 for (i = 0; i < TX_RING_SIZE; i++) { 341 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i)); 342 ib->btx_ring [i].tmd0 = leptr; 343 ib->btx_ring [i].tmd1_hadr = leptr >> 16; 344 ib->btx_ring [i].tmd1_bits = 0; 345 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ 346 ib->btx_ring [i].misc = 0; 347 } 348 349 /* Setup the Rx ring entries */ 350 for (i = 0; i < RX_RING_SIZE; i++) { 351 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i)); 352 353 ib->brx_ring [i].rmd0 = leptr; 354 ib->brx_ring [i].rmd1_hadr = leptr >> 16; 355 ib->brx_ring [i].rmd1_bits = LE_R1_OWN; 356 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; 357 ib->brx_ring [i].mblength = 0; 358 } 359 360 /* Setup the initialization block */ 361 362 /* Setup rx descriptor pointer */ 363 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0)); 364 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16); 365 ib->rx_ptr = leptr; 366 367 /* Setup tx descriptor pointer */ 368 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0)); 369 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16); 370 ib->tx_ptr = leptr; 371 } 372 373 static void lance_init_ring_pio(struct net_device *dev) 374 { 375 struct lance_private *lp = netdev_priv(dev); 376 struct lance_init_block __iomem *ib = lp->init_block_iomem; 377 u32 leptr; 378 int i; 379 380 /* Lock out other processes while setting up hardware */ 381 netif_stop_queue(dev); 382 lp->rx_new = lp->tx_new = 0; 383 lp->rx_old = lp->tx_old = 0; 384 385 /* Copy the ethernet address to the lance init block 386 * Note that on the sparc you need to swap the ethernet address. 387 */ 388 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]); 389 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]); 390 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]); 391 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]); 392 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]); 393 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]); 394 395 /* Setup the Tx ring entries */ 396 for (i = 0; i < TX_RING_SIZE; i++) { 397 leptr = libbuff_offset(tx_buf, i); 398 sbus_writew(leptr, &ib->btx_ring [i].tmd0); 399 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr); 400 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits); 401 402 /* The ones required by tmd2 */ 403 sbus_writew(0xf000, &ib->btx_ring [i].length); 404 sbus_writew(0, &ib->btx_ring [i].misc); 405 } 406 407 /* Setup the Rx ring entries */ 408 for (i = 0; i < RX_RING_SIZE; i++) { 409 leptr = libbuff_offset(rx_buf, i); 410 411 sbus_writew(leptr, &ib->brx_ring [i].rmd0); 412 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr); 413 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits); 414 sbus_writew(-RX_BUFF_SIZE|0xf000, 415 &ib->brx_ring [i].length); 416 sbus_writew(0, &ib->brx_ring [i].mblength); 417 } 418 419 /* Setup the initialization block */ 420 421 /* Setup rx descriptor pointer */ 422 leptr = libdesc_offset(brx_ring, 0); 423 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16), 424 &ib->rx_len); 425 sbus_writew(leptr, &ib->rx_ptr); 426 427 /* Setup tx descriptor pointer */ 428 leptr = libdesc_offset(btx_ring, 0); 429 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16), 430 &ib->tx_len); 431 sbus_writew(leptr, &ib->tx_ptr); 432 } 433 434 static void init_restart_ledma(struct lance_private *lp) 435 { 436 u32 csr = sbus_readl(lp->dregs + DMA_CSR); 437 438 if (!(csr & DMA_HNDL_ERROR)) { 439 /* E-Cache draining */ 440 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN) 441 barrier(); 442 } 443 444 csr = sbus_readl(lp->dregs + DMA_CSR); 445 csr &= ~DMA_E_BURSTS; 446 if (lp->burst_sizes & DMA_BURST32) 447 csr |= DMA_E_BURST32; 448 else 449 csr |= DMA_E_BURST16; 450 451 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV); 452 453 if (lp->tpe) 454 csr |= DMA_EN_ENETAUI; 455 else 456 csr &= ~DMA_EN_ENETAUI; 457 udelay(20); 458 sbus_writel(csr, lp->dregs + DMA_CSR); 459 udelay(200); 460 } 461 462 static int init_restart_lance(struct lance_private *lp) 463 { 464 u16 regval = 0; 465 int i; 466 467 if (lp->dregs) 468 init_restart_ledma(lp); 469 470 sbus_writew(LE_CSR0, lp->lregs + RAP); 471 sbus_writew(LE_C0_INIT, lp->lregs + RDP); 472 473 /* Wait for the lance to complete initialization */ 474 for (i = 0; i < 100; i++) { 475 regval = sbus_readw(lp->lregs + RDP); 476 477 if (regval & (LE_C0_ERR | LE_C0_IDON)) 478 break; 479 barrier(); 480 } 481 if (i == 100 || (regval & LE_C0_ERR)) { 482 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n", 483 i, regval); 484 if (lp->dregs) 485 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR)); 486 return -1; 487 } 488 489 /* Clear IDON by writing a "1", enable interrupts and start lance */ 490 sbus_writew(LE_C0_IDON, lp->lregs + RDP); 491 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP); 492 493 if (lp->dregs) { 494 u32 csr = sbus_readl(lp->dregs + DMA_CSR); 495 496 csr |= DMA_INT_ENAB; 497 sbus_writel(csr, lp->dregs + DMA_CSR); 498 } 499 500 return 0; 501 } 502 503 static void lance_rx_dvma(struct net_device *dev) 504 { 505 struct lance_private *lp = netdev_priv(dev); 506 struct lance_init_block *ib = lp->init_block_mem; 507 struct lance_rx_desc *rd; 508 u8 bits; 509 int len, entry = lp->rx_new; 510 struct sk_buff *skb; 511 512 for (rd = &ib->brx_ring [entry]; 513 !((bits = rd->rmd1_bits) & LE_R1_OWN); 514 rd = &ib->brx_ring [entry]) { 515 516 /* We got an incomplete frame? */ 517 if ((bits & LE_R1_POK) != LE_R1_POK) { 518 dev->stats.rx_over_errors++; 519 dev->stats.rx_errors++; 520 } else if (bits & LE_R1_ERR) { 521 /* Count only the end frame as a rx error, 522 * not the beginning 523 */ 524 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; 525 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; 526 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; 527 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; 528 if (bits & LE_R1_EOP) dev->stats.rx_errors++; 529 } else { 530 len = (rd->mblength & 0xfff) - 4; 531 skb = netdev_alloc_skb(dev, len + 2); 532 533 if (skb == NULL) { 534 dev->stats.rx_dropped++; 535 rd->mblength = 0; 536 rd->rmd1_bits = LE_R1_OWN; 537 lp->rx_new = RX_NEXT(entry); 538 return; 539 } 540 541 dev->stats.rx_bytes += len; 542 543 skb_reserve(skb, 2); /* 16 byte align */ 544 skb_put(skb, len); /* make room */ 545 skb_copy_to_linear_data(skb, 546 (unsigned char *)&(ib->rx_buf [entry][0]), 547 len); 548 skb->protocol = eth_type_trans(skb, dev); 549 netif_rx(skb); 550 dev->stats.rx_packets++; 551 } 552 553 /* Return the packet to the pool */ 554 rd->mblength = 0; 555 rd->rmd1_bits = LE_R1_OWN; 556 entry = RX_NEXT(entry); 557 } 558 559 lp->rx_new = entry; 560 } 561 562 static void lance_tx_dvma(struct net_device *dev) 563 { 564 struct lance_private *lp = netdev_priv(dev); 565 struct lance_init_block *ib = lp->init_block_mem; 566 int i, j; 567 568 spin_lock(&lp->lock); 569 570 j = lp->tx_old; 571 for (i = j; i != lp->tx_new; i = j) { 572 struct lance_tx_desc *td = &ib->btx_ring [i]; 573 u8 bits = td->tmd1_bits; 574 575 /* If we hit a packet not owned by us, stop */ 576 if (bits & LE_T1_OWN) 577 break; 578 579 if (bits & LE_T1_ERR) { 580 u16 status = td->misc; 581 582 dev->stats.tx_errors++; 583 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; 584 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; 585 586 if (status & LE_T3_CLOS) { 587 dev->stats.tx_carrier_errors++; 588 if (lp->auto_select) { 589 lp->tpe = 1 - lp->tpe; 590 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n", 591 dev->name, lp->tpe?"TPE":"AUI"); 592 STOP_LANCE(lp); 593 lp->init_ring(dev); 594 load_csrs(lp); 595 init_restart_lance(lp); 596 goto out; 597 } 598 } 599 600 /* Buffer errors and underflows turn off the 601 * transmitter, restart the adapter. 602 */ 603 if (status & (LE_T3_BUF|LE_T3_UFL)) { 604 dev->stats.tx_fifo_errors++; 605 606 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n", 607 dev->name); 608 STOP_LANCE(lp); 609 lp->init_ring(dev); 610 load_csrs(lp); 611 init_restart_lance(lp); 612 goto out; 613 } 614 } else if ((bits & LE_T1_POK) == LE_T1_POK) { 615 /* 616 * So we don't count the packet more than once. 617 */ 618 td->tmd1_bits = bits & ~(LE_T1_POK); 619 620 /* One collision before packet was sent. */ 621 if (bits & LE_T1_EONE) 622 dev->stats.collisions++; 623 624 /* More than one collision, be optimistic. */ 625 if (bits & LE_T1_EMORE) 626 dev->stats.collisions += 2; 627 628 dev->stats.tx_packets++; 629 } 630 631 j = TX_NEXT(j); 632 } 633 lp->tx_old = j; 634 out: 635 if (netif_queue_stopped(dev) && 636 TX_BUFFS_AVAIL > 0) 637 netif_wake_queue(dev); 638 639 spin_unlock(&lp->lock); 640 } 641 642 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len) 643 { 644 u16 *p16 = (u16 *) skb->data; 645 u32 *p32; 646 u8 *p8; 647 void __iomem *pbuf = piobuf; 648 649 /* We know here that both src and dest are on a 16bit boundary. */ 650 *p16++ = sbus_readw(pbuf); 651 p32 = (u32 *) p16; 652 pbuf += 2; 653 len -= 2; 654 655 while (len >= 4) { 656 *p32++ = sbus_readl(pbuf); 657 pbuf += 4; 658 len -= 4; 659 } 660 p8 = (u8 *) p32; 661 if (len >= 2) { 662 p16 = (u16 *) p32; 663 *p16++ = sbus_readw(pbuf); 664 pbuf += 2; 665 len -= 2; 666 p8 = (u8 *) p16; 667 } 668 if (len >= 1) 669 *p8 = sbus_readb(pbuf); 670 } 671 672 static void lance_rx_pio(struct net_device *dev) 673 { 674 struct lance_private *lp = netdev_priv(dev); 675 struct lance_init_block __iomem *ib = lp->init_block_iomem; 676 struct lance_rx_desc __iomem *rd; 677 unsigned char bits; 678 int len, entry; 679 struct sk_buff *skb; 680 681 entry = lp->rx_new; 682 for (rd = &ib->brx_ring [entry]; 683 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN); 684 rd = &ib->brx_ring [entry]) { 685 686 /* We got an incomplete frame? */ 687 if ((bits & LE_R1_POK) != LE_R1_POK) { 688 dev->stats.rx_over_errors++; 689 dev->stats.rx_errors++; 690 } else if (bits & LE_R1_ERR) { 691 /* Count only the end frame as a rx error, 692 * not the beginning 693 */ 694 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; 695 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; 696 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; 697 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; 698 if (bits & LE_R1_EOP) dev->stats.rx_errors++; 699 } else { 700 len = (sbus_readw(&rd->mblength) & 0xfff) - 4; 701 skb = netdev_alloc_skb(dev, len + 2); 702 703 if (skb == NULL) { 704 dev->stats.rx_dropped++; 705 sbus_writew(0, &rd->mblength); 706 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits); 707 lp->rx_new = RX_NEXT(entry); 708 return; 709 } 710 711 dev->stats.rx_bytes += len; 712 713 skb_reserve (skb, 2); /* 16 byte align */ 714 skb_put(skb, len); /* make room */ 715 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len); 716 skb->protocol = eth_type_trans(skb, dev); 717 netif_rx(skb); 718 dev->stats.rx_packets++; 719 } 720 721 /* Return the packet to the pool */ 722 sbus_writew(0, &rd->mblength); 723 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits); 724 entry = RX_NEXT(entry); 725 } 726 727 lp->rx_new = entry; 728 } 729 730 static void lance_tx_pio(struct net_device *dev) 731 { 732 struct lance_private *lp = netdev_priv(dev); 733 struct lance_init_block __iomem *ib = lp->init_block_iomem; 734 int i, j; 735 736 spin_lock(&lp->lock); 737 738 j = lp->tx_old; 739 for (i = j; i != lp->tx_new; i = j) { 740 struct lance_tx_desc __iomem *td = &ib->btx_ring [i]; 741 u8 bits = sbus_readb(&td->tmd1_bits); 742 743 /* If we hit a packet not owned by us, stop */ 744 if (bits & LE_T1_OWN) 745 break; 746 747 if (bits & LE_T1_ERR) { 748 u16 status = sbus_readw(&td->misc); 749 750 dev->stats.tx_errors++; 751 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; 752 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; 753 754 if (status & LE_T3_CLOS) { 755 dev->stats.tx_carrier_errors++; 756 if (lp->auto_select) { 757 lp->tpe = 1 - lp->tpe; 758 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n", 759 dev->name, lp->tpe?"TPE":"AUI"); 760 STOP_LANCE(lp); 761 lp->init_ring(dev); 762 load_csrs(lp); 763 init_restart_lance(lp); 764 goto out; 765 } 766 } 767 768 /* Buffer errors and underflows turn off the 769 * transmitter, restart the adapter. 770 */ 771 if (status & (LE_T3_BUF|LE_T3_UFL)) { 772 dev->stats.tx_fifo_errors++; 773 774 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n", 775 dev->name); 776 STOP_LANCE(lp); 777 lp->init_ring(dev); 778 load_csrs(lp); 779 init_restart_lance(lp); 780 goto out; 781 } 782 } else if ((bits & LE_T1_POK) == LE_T1_POK) { 783 /* 784 * So we don't count the packet more than once. 785 */ 786 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits); 787 788 /* One collision before packet was sent. */ 789 if (bits & LE_T1_EONE) 790 dev->stats.collisions++; 791 792 /* More than one collision, be optimistic. */ 793 if (bits & LE_T1_EMORE) 794 dev->stats.collisions += 2; 795 796 dev->stats.tx_packets++; 797 } 798 799 j = TX_NEXT(j); 800 } 801 lp->tx_old = j; 802 803 if (netif_queue_stopped(dev) && 804 TX_BUFFS_AVAIL > 0) 805 netif_wake_queue(dev); 806 out: 807 spin_unlock(&lp->lock); 808 } 809 810 static irqreturn_t lance_interrupt(int irq, void *dev_id) 811 { 812 struct net_device *dev = dev_id; 813 struct lance_private *lp = netdev_priv(dev); 814 int csr0; 815 816 sbus_writew(LE_CSR0, lp->lregs + RAP); 817 csr0 = sbus_readw(lp->lregs + RDP); 818 819 /* Acknowledge all the interrupt sources ASAP */ 820 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT), 821 lp->lregs + RDP); 822 823 if ((csr0 & LE_C0_ERR) != 0) { 824 /* Clear the error condition */ 825 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | 826 LE_C0_CERR | LE_C0_MERR), 827 lp->lregs + RDP); 828 } 829 830 if (csr0 & LE_C0_RINT) 831 lp->rx(dev); 832 833 if (csr0 & LE_C0_TINT) 834 lp->tx(dev); 835 836 if (csr0 & LE_C0_BABL) 837 dev->stats.tx_errors++; 838 839 if (csr0 & LE_C0_MISS) 840 dev->stats.rx_errors++; 841 842 if (csr0 & LE_C0_MERR) { 843 if (lp->dregs) { 844 u32 addr = sbus_readl(lp->dregs + DMA_ADDR); 845 846 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n", 847 dev->name, csr0, addr & 0xffffff); 848 } else { 849 printk(KERN_ERR "%s: Memory error, status %04x\n", 850 dev->name, csr0); 851 } 852 853 sbus_writew(LE_C0_STOP, lp->lregs + RDP); 854 855 if (lp->dregs) { 856 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR); 857 858 dma_csr |= DMA_FIFO_INV; 859 sbus_writel(dma_csr, lp->dregs + DMA_CSR); 860 } 861 862 lp->init_ring(dev); 863 load_csrs(lp); 864 init_restart_lance(lp); 865 netif_wake_queue(dev); 866 } 867 868 sbus_writew(LE_C0_INEA, lp->lregs + RDP); 869 870 return IRQ_HANDLED; 871 } 872 873 /* Build a fake network packet and send it to ourselves. */ 874 static void build_fake_packet(struct lance_private *lp) 875 { 876 struct net_device *dev = lp->dev; 877 int i, entry; 878 879 entry = lp->tx_new & TX_RING_MOD_MASK; 880 if (lp->pio_buffer) { 881 struct lance_init_block __iomem *ib = lp->init_block_iomem; 882 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]); 883 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet; 884 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++) 885 sbus_writew(0, &packet[i]); 886 for (i = 0; i < 6; i++) { 887 sbus_writeb(dev->dev_addr[i], ð->h_dest[i]); 888 sbus_writeb(dev->dev_addr[i], ð->h_source[i]); 889 } 890 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length); 891 sbus_writew(0, &ib->btx_ring[entry].misc); 892 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits); 893 } else { 894 struct lance_init_block *ib = lp->init_block_mem; 895 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]); 896 struct ethhdr *eth = (struct ethhdr *) packet; 897 memset(packet, 0, ETH_ZLEN); 898 for (i = 0; i < 6; i++) { 899 eth->h_dest[i] = dev->dev_addr[i]; 900 eth->h_source[i] = dev->dev_addr[i]; 901 } 902 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000; 903 ib->btx_ring[entry].misc = 0; 904 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); 905 } 906 lp->tx_new = TX_NEXT(entry); 907 } 908 909 static int lance_open(struct net_device *dev) 910 { 911 struct lance_private *lp = netdev_priv(dev); 912 int status = 0; 913 914 STOP_LANCE(lp); 915 916 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED, 917 lancestr, (void *) dev)) { 918 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq); 919 return -EAGAIN; 920 } 921 922 /* On the 4m, setup the ledma to provide the upper bits for buffers */ 923 if (lp->dregs) { 924 u32 regval = lp->init_block_dvma & 0xff000000; 925 926 sbus_writel(regval, lp->dregs + DMA_TEST); 927 } 928 929 /* Set mode and clear multicast filter only at device open, 930 * so that lance_init_ring() called at any error will not 931 * forget multicast filters. 932 * 933 * BTW it is common bug in all lance drivers! --ANK 934 */ 935 if (lp->pio_buffer) { 936 struct lance_init_block __iomem *ib = lp->init_block_iomem; 937 sbus_writew(0, &ib->mode); 938 sbus_writel(0, &ib->filter[0]); 939 sbus_writel(0, &ib->filter[1]); 940 } else { 941 struct lance_init_block *ib = lp->init_block_mem; 942 ib->mode = 0; 943 ib->filter [0] = 0; 944 ib->filter [1] = 0; 945 } 946 947 lp->init_ring(dev); 948 load_csrs(lp); 949 950 netif_start_queue(dev); 951 952 status = init_restart_lance(lp); 953 if (!status && lp->auto_select) { 954 build_fake_packet(lp); 955 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP); 956 } 957 958 return status; 959 } 960 961 static int lance_close(struct net_device *dev) 962 { 963 struct lance_private *lp = netdev_priv(dev); 964 965 netif_stop_queue(dev); 966 del_timer_sync(&lp->multicast_timer); 967 968 STOP_LANCE(lp); 969 970 free_irq(dev->irq, (void *) dev); 971 return 0; 972 } 973 974 static int lance_reset(struct net_device *dev) 975 { 976 struct lance_private *lp = netdev_priv(dev); 977 int status; 978 979 STOP_LANCE(lp); 980 981 /* On the 4m, reset the dma too */ 982 if (lp->dregs) { 983 u32 csr, addr; 984 985 printk(KERN_ERR "resetting ledma\n"); 986 csr = sbus_readl(lp->dregs + DMA_CSR); 987 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR); 988 udelay(200); 989 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR); 990 991 addr = lp->init_block_dvma & 0xff000000; 992 sbus_writel(addr, lp->dregs + DMA_TEST); 993 } 994 lp->init_ring(dev); 995 load_csrs(lp); 996 netif_trans_update(dev); /* prevent tx timeout */ 997 status = init_restart_lance(lp); 998 return status; 999 } 1000 1001 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len) 1002 { 1003 void __iomem *piobuf = dest; 1004 u32 *p32; 1005 u16 *p16; 1006 u8 *p8; 1007 1008 switch ((unsigned long)src & 0x3) { 1009 case 0: 1010 p32 = (u32 *) src; 1011 while (len >= 4) { 1012 sbus_writel(*p32, piobuf); 1013 p32++; 1014 piobuf += 4; 1015 len -= 4; 1016 } 1017 src = (char *) p32; 1018 break; 1019 case 1: 1020 case 3: 1021 p8 = (u8 *) src; 1022 while (len >= 4) { 1023 u32 val; 1024 1025 val = p8[0] << 24; 1026 val |= p8[1] << 16; 1027 val |= p8[2] << 8; 1028 val |= p8[3]; 1029 sbus_writel(val, piobuf); 1030 p8 += 4; 1031 piobuf += 4; 1032 len -= 4; 1033 } 1034 src = (char *) p8; 1035 break; 1036 case 2: 1037 p16 = (u16 *) src; 1038 while (len >= 4) { 1039 u32 val = p16[0]<<16 | p16[1]; 1040 sbus_writel(val, piobuf); 1041 p16 += 2; 1042 piobuf += 4; 1043 len -= 4; 1044 } 1045 src = (char *) p16; 1046 break; 1047 } 1048 if (len >= 2) { 1049 u16 val = src[0] << 8 | src[1]; 1050 sbus_writew(val, piobuf); 1051 src += 2; 1052 piobuf += 2; 1053 len -= 2; 1054 } 1055 if (len >= 1) 1056 sbus_writeb(src[0], piobuf); 1057 } 1058 1059 static void lance_piozero(void __iomem *dest, int len) 1060 { 1061 void __iomem *piobuf = dest; 1062 1063 if ((unsigned long)piobuf & 1) { 1064 sbus_writeb(0, piobuf); 1065 piobuf += 1; 1066 len -= 1; 1067 if (len == 0) 1068 return; 1069 } 1070 if (len == 1) { 1071 sbus_writeb(0, piobuf); 1072 return; 1073 } 1074 if ((unsigned long)piobuf & 2) { 1075 sbus_writew(0, piobuf); 1076 piobuf += 2; 1077 len -= 2; 1078 if (len == 0) 1079 return; 1080 } 1081 while (len >= 4) { 1082 sbus_writel(0, piobuf); 1083 piobuf += 4; 1084 len -= 4; 1085 } 1086 if (len >= 2) { 1087 sbus_writew(0, piobuf); 1088 piobuf += 2; 1089 len -= 2; 1090 } 1091 if (len >= 1) 1092 sbus_writeb(0, piobuf); 1093 } 1094 1095 static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue) 1096 { 1097 struct lance_private *lp = netdev_priv(dev); 1098 1099 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n", 1100 dev->name, sbus_readw(lp->lregs + RDP)); 1101 lance_reset(dev); 1102 netif_wake_queue(dev); 1103 } 1104 1105 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev) 1106 { 1107 struct lance_private *lp = netdev_priv(dev); 1108 int entry, skblen, len; 1109 1110 skblen = skb->len; 1111 1112 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; 1113 1114 spin_lock_irq(&lp->lock); 1115 1116 dev->stats.tx_bytes += len; 1117 1118 entry = lp->tx_new & TX_RING_MOD_MASK; 1119 if (lp->pio_buffer) { 1120 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1121 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length); 1122 sbus_writew(0, &ib->btx_ring[entry].misc); 1123 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen); 1124 if (len != skblen) 1125 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen); 1126 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits); 1127 } else { 1128 struct lance_init_block *ib = lp->init_block_mem; 1129 ib->btx_ring [entry].length = (-len) | 0xf000; 1130 ib->btx_ring [entry].misc = 0; 1131 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen); 1132 if (len != skblen) 1133 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen); 1134 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN); 1135 } 1136 1137 lp->tx_new = TX_NEXT(entry); 1138 1139 if (TX_BUFFS_AVAIL <= 0) 1140 netif_stop_queue(dev); 1141 1142 /* Kick the lance: transmit now */ 1143 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP); 1144 1145 /* Read back CSR to invalidate the E-Cache. 1146 * This is needed, because DMA_DSBL_WR_INV is set. 1147 */ 1148 if (lp->dregs) 1149 sbus_readw(lp->lregs + RDP); 1150 1151 spin_unlock_irq(&lp->lock); 1152 1153 dev_kfree_skb(skb); 1154 1155 return NETDEV_TX_OK; 1156 } 1157 1158 /* taken from the depca driver */ 1159 static void lance_load_multicast(struct net_device *dev) 1160 { 1161 struct lance_private *lp = netdev_priv(dev); 1162 struct netdev_hw_addr *ha; 1163 u32 crc; 1164 u32 val; 1165 1166 /* set all multicast bits */ 1167 if (dev->flags & IFF_ALLMULTI) 1168 val = ~0; 1169 else 1170 val = 0; 1171 1172 if (lp->pio_buffer) { 1173 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1174 sbus_writel(val, &ib->filter[0]); 1175 sbus_writel(val, &ib->filter[1]); 1176 } else { 1177 struct lance_init_block *ib = lp->init_block_mem; 1178 ib->filter [0] = val; 1179 ib->filter [1] = val; 1180 } 1181 1182 if (dev->flags & IFF_ALLMULTI) 1183 return; 1184 1185 /* Add addresses */ 1186 netdev_for_each_mc_addr(ha, dev) { 1187 crc = ether_crc_le(6, ha->addr); 1188 crc = crc >> 26; 1189 if (lp->pio_buffer) { 1190 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1191 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter; 1192 u16 tmp = sbus_readw(&mcast_table[crc>>4]); 1193 tmp |= 1 << (crc & 0xf); 1194 sbus_writew(tmp, &mcast_table[crc>>4]); 1195 } else { 1196 struct lance_init_block *ib = lp->init_block_mem; 1197 u16 *mcast_table = (u16 *) &ib->filter; 1198 mcast_table [crc >> 4] |= 1 << (crc & 0xf); 1199 } 1200 } 1201 } 1202 1203 static void lance_set_multicast(struct net_device *dev) 1204 { 1205 struct lance_private *lp = netdev_priv(dev); 1206 struct lance_init_block *ib_mem = lp->init_block_mem; 1207 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem; 1208 u16 mode; 1209 1210 if (!netif_running(dev)) 1211 return; 1212 1213 if (lp->tx_old != lp->tx_new) { 1214 mod_timer(&lp->multicast_timer, jiffies + 4); 1215 netif_wake_queue(dev); 1216 return; 1217 } 1218 1219 netif_stop_queue(dev); 1220 1221 STOP_LANCE(lp); 1222 lp->init_ring(dev); 1223 1224 if (lp->pio_buffer) 1225 mode = sbus_readw(&ib_iomem->mode); 1226 else 1227 mode = ib_mem->mode; 1228 if (dev->flags & IFF_PROMISC) { 1229 mode |= LE_MO_PROM; 1230 if (lp->pio_buffer) 1231 sbus_writew(mode, &ib_iomem->mode); 1232 else 1233 ib_mem->mode = mode; 1234 } else { 1235 mode &= ~LE_MO_PROM; 1236 if (lp->pio_buffer) 1237 sbus_writew(mode, &ib_iomem->mode); 1238 else 1239 ib_mem->mode = mode; 1240 lance_load_multicast(dev); 1241 } 1242 load_csrs(lp); 1243 init_restart_lance(lp); 1244 netif_wake_queue(dev); 1245 } 1246 1247 static void lance_set_multicast_retry(struct timer_list *t) 1248 { 1249 struct lance_private *lp = from_timer(lp, t, multicast_timer); 1250 struct net_device *dev = lp->dev; 1251 1252 lance_set_multicast(dev); 1253 } 1254 1255 static void lance_free_hwresources(struct lance_private *lp) 1256 { 1257 if (lp->lregs) 1258 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE); 1259 if (lp->dregs) { 1260 struct platform_device *ledma = lp->ledma; 1261 1262 of_iounmap(&ledma->resource[0], lp->dregs, 1263 resource_size(&ledma->resource[0])); 1264 } 1265 if (lp->init_block_iomem) { 1266 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem, 1267 sizeof(struct lance_init_block)); 1268 } else if (lp->init_block_mem) { 1269 dma_free_coherent(&lp->op->dev, 1270 sizeof(struct lance_init_block), 1271 lp->init_block_mem, 1272 lp->init_block_dvma); 1273 } 1274 } 1275 1276 /* Ethtool support... */ 1277 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 1278 { 1279 strlcpy(info->driver, "sunlance", sizeof(info->driver)); 1280 } 1281 1282 static const struct ethtool_ops sparc_lance_ethtool_ops = { 1283 .get_drvinfo = sparc_lance_get_drvinfo, 1284 .get_link = ethtool_op_get_link, 1285 }; 1286 1287 static const struct net_device_ops sparc_lance_ops = { 1288 .ndo_open = lance_open, 1289 .ndo_stop = lance_close, 1290 .ndo_start_xmit = lance_start_xmit, 1291 .ndo_set_rx_mode = lance_set_multicast, 1292 .ndo_tx_timeout = lance_tx_timeout, 1293 .ndo_set_mac_address = eth_mac_addr, 1294 .ndo_validate_addr = eth_validate_addr, 1295 }; 1296 1297 static int sparc_lance_probe_one(struct platform_device *op, 1298 struct platform_device *ledma, 1299 struct platform_device *lebuffer) 1300 { 1301 struct device_node *dp = op->dev.of_node; 1302 struct lance_private *lp; 1303 struct net_device *dev; 1304 1305 dev = alloc_etherdev(sizeof(struct lance_private) + 8); 1306 if (!dev) 1307 return -ENOMEM; 1308 1309 lp = netdev_priv(dev); 1310 1311 spin_lock_init(&lp->lock); 1312 1313 /* Copy the IDPROM ethernet address to the device structure, later we 1314 * will copy the address in the device structure to the lance 1315 * initialization block. 1316 */ 1317 eth_hw_addr_set(dev, idprom->id_ethaddr); 1318 1319 /* Get the IO region */ 1320 lp->lregs = of_ioremap(&op->resource[0], 0, 1321 LANCE_REG_SIZE, lancestr); 1322 if (!lp->lregs) { 1323 printk(KERN_ERR "SunLance: Cannot map registers.\n"); 1324 goto fail; 1325 } 1326 1327 lp->ledma = ledma; 1328 if (lp->ledma) { 1329 lp->dregs = of_ioremap(&ledma->resource[0], 0, 1330 resource_size(&ledma->resource[0]), 1331 "ledma"); 1332 if (!lp->dregs) { 1333 printk(KERN_ERR "SunLance: Cannot map " 1334 "ledma registers.\n"); 1335 goto fail; 1336 } 1337 } 1338 1339 lp->op = op; 1340 lp->lebuffer = lebuffer; 1341 if (lebuffer) { 1342 /* sanity check */ 1343 if (lebuffer->resource[0].start & 7) { 1344 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n"); 1345 goto fail; 1346 } 1347 lp->init_block_iomem = 1348 of_ioremap(&lebuffer->resource[0], 0, 1349 sizeof(struct lance_init_block), "lebuffer"); 1350 if (!lp->init_block_iomem) { 1351 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n"); 1352 goto fail; 1353 } 1354 lp->init_block_dvma = 0; 1355 lp->pio_buffer = 1; 1356 lp->init_ring = lance_init_ring_pio; 1357 lp->rx = lance_rx_pio; 1358 lp->tx = lance_tx_pio; 1359 } else { 1360 lp->init_block_mem = 1361 dma_alloc_coherent(&op->dev, 1362 sizeof(struct lance_init_block), 1363 &lp->init_block_dvma, GFP_ATOMIC); 1364 if (!lp->init_block_mem) 1365 goto fail; 1366 1367 lp->pio_buffer = 0; 1368 lp->init_ring = lance_init_ring_dvma; 1369 lp->rx = lance_rx_dvma; 1370 lp->tx = lance_tx_dvma; 1371 } 1372 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval", 1373 (LE_C3_BSWP | 1374 LE_C3_ACON | 1375 LE_C3_BCON)); 1376 1377 lp->name = lancestr; 1378 1379 lp->burst_sizes = 0; 1380 if (lp->ledma) { 1381 struct device_node *ledma_dp = ledma->dev.of_node; 1382 struct device_node *sbus_dp; 1383 unsigned int sbmask; 1384 const char *prop; 1385 u32 csr; 1386 1387 /* Find burst-size property for ledma */ 1388 lp->burst_sizes = of_getintprop_default(ledma_dp, 1389 "burst-sizes", 0); 1390 1391 /* ledma may be capable of fast bursts, but sbus may not. */ 1392 sbus_dp = ledma_dp->parent; 1393 sbmask = of_getintprop_default(sbus_dp, "burst-sizes", 1394 DMA_BURSTBITS); 1395 lp->burst_sizes &= sbmask; 1396 1397 /* Get the cable-selection property */ 1398 prop = of_get_property(ledma_dp, "cable-selection", NULL); 1399 if (!prop || prop[0] == '\0') { 1400 struct device_node *nd; 1401 1402 printk(KERN_INFO "SunLance: using " 1403 "auto-carrier-detection.\n"); 1404 1405 nd = of_find_node_by_path("/options"); 1406 if (!nd) 1407 goto no_link_test; 1408 1409 prop = of_get_property(nd, "tpe-link-test?", NULL); 1410 if (!prop) 1411 goto node_put; 1412 1413 if (strcmp(prop, "true")) { 1414 printk(KERN_NOTICE "SunLance: warning: overriding option " 1415 "'tpe-link-test?'\n"); 1416 printk(KERN_NOTICE "SunLance: warning: mail any problems " 1417 "to ecd@skynet.be\n"); 1418 auxio_set_lte(AUXIO_LTE_ON); 1419 } 1420 node_put: 1421 of_node_put(nd); 1422 no_link_test: 1423 lp->auto_select = 1; 1424 lp->tpe = 0; 1425 } else if (!strcmp(prop, "aui")) { 1426 lp->auto_select = 0; 1427 lp->tpe = 0; 1428 } else { 1429 lp->auto_select = 0; 1430 lp->tpe = 1; 1431 } 1432 1433 /* Reset ledma */ 1434 csr = sbus_readl(lp->dregs + DMA_CSR); 1435 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR); 1436 udelay(200); 1437 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR); 1438 } else 1439 lp->dregs = NULL; 1440 1441 lp->dev = dev; 1442 SET_NETDEV_DEV(dev, &op->dev); 1443 dev->watchdog_timeo = 5*HZ; 1444 dev->ethtool_ops = &sparc_lance_ethtool_ops; 1445 dev->netdev_ops = &sparc_lance_ops; 1446 1447 dev->irq = op->archdata.irqs[0]; 1448 1449 /* We cannot sleep if the chip is busy during a 1450 * multicast list update event, because such events 1451 * can occur from interrupts (ex. IPv6). So we 1452 * use a timer to try again later when necessary. -DaveM 1453 */ 1454 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0); 1455 1456 if (register_netdev(dev)) { 1457 printk(KERN_ERR "SunLance: Cannot register device.\n"); 1458 goto fail; 1459 } 1460 1461 platform_set_drvdata(op, lp); 1462 1463 printk(KERN_INFO "%s: LANCE %pM\n", 1464 dev->name, dev->dev_addr); 1465 1466 return 0; 1467 1468 fail: 1469 lance_free_hwresources(lp); 1470 free_netdev(dev); 1471 return -ENODEV; 1472 } 1473 1474 static int sunlance_sbus_probe(struct platform_device *op) 1475 { 1476 struct platform_device *parent = to_platform_device(op->dev.parent); 1477 struct device_node *parent_dp = parent->dev.of_node; 1478 int err; 1479 1480 if (of_node_name_eq(parent_dp, "ledma")) { 1481 err = sparc_lance_probe_one(op, parent, NULL); 1482 } else if (of_node_name_eq(parent_dp, "lebuffer")) { 1483 err = sparc_lance_probe_one(op, NULL, parent); 1484 } else 1485 err = sparc_lance_probe_one(op, NULL, NULL); 1486 1487 return err; 1488 } 1489 1490 static int sunlance_sbus_remove(struct platform_device *op) 1491 { 1492 struct lance_private *lp = platform_get_drvdata(op); 1493 struct net_device *net_dev = lp->dev; 1494 1495 unregister_netdev(net_dev); 1496 1497 lance_free_hwresources(lp); 1498 1499 free_netdev(net_dev); 1500 1501 return 0; 1502 } 1503 1504 static const struct of_device_id sunlance_sbus_match[] = { 1505 { 1506 .name = "le", 1507 }, 1508 {}, 1509 }; 1510 1511 MODULE_DEVICE_TABLE(of, sunlance_sbus_match); 1512 1513 static struct platform_driver sunlance_sbus_driver = { 1514 .driver = { 1515 .name = "sunlance", 1516 .of_match_table = sunlance_sbus_match, 1517 }, 1518 .probe = sunlance_sbus_probe, 1519 .remove = sunlance_sbus_remove, 1520 }; 1521 1522 module_platform_driver(sunlance_sbus_driver); 1523