1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Network device driver for the BMAC ethernet controller on 4 * Apple Powermacs. Assumes it's under a DBDMA controller. 5 * 6 * Copyright (C) 1998 Randy Gobbel. 7 * 8 * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to 9 * dynamic procfs inode. 10 */ 11 #include <linux/interrupt.h> 12 #include <linux/module.h> 13 #include <linux/kernel.h> 14 #include <linux/netdevice.h> 15 #include <linux/etherdevice.h> 16 #include <linux/delay.h> 17 #include <linux/string.h> 18 #include <linux/timer.h> 19 #include <linux/proc_fs.h> 20 #include <linux/init.h> 21 #include <linux/spinlock.h> 22 #include <linux/crc32.h> 23 #include <linux/crc32poly.h> 24 #include <linux/bitrev.h> 25 #include <linux/ethtool.h> 26 #include <linux/slab.h> 27 #include <linux/pgtable.h> 28 #include <asm/dbdma.h> 29 #include <asm/io.h> 30 #include <asm/page.h> 31 #include <asm/machdep.h> 32 #include <asm/pmac_feature.h> 33 #include <asm/macio.h> 34 #include <asm/irq.h> 35 36 #include "bmac.h" 37 38 #define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1)))) 39 #define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1))) 40 41 /* switch to use multicast code lifted from sunhme driver */ 42 #define SUNHME_MULTICAST 43 44 #define N_RX_RING 64 45 #define N_TX_RING 32 46 #define MAX_TX_ACTIVE 1 47 #define ETHERCRC 4 48 #define ETHERMINPACKET 64 49 #define ETHERMTU 1500 50 #define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2) 51 #define TX_TIMEOUT HZ /* 1 second */ 52 53 /* Bits in transmit DMA status */ 54 #define TX_DMA_ERR 0x80 55 56 #define XXDEBUG(args) 57 58 struct bmac_data { 59 /* volatile struct bmac *bmac; */ 60 struct sk_buff_head *queue; 61 volatile struct dbdma_regs __iomem *tx_dma; 62 int tx_dma_intr; 63 volatile struct dbdma_regs __iomem *rx_dma; 64 int rx_dma_intr; 65 volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */ 66 volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */ 67 struct macio_dev *mdev; 68 int is_bmac_plus; 69 struct sk_buff *rx_bufs[N_RX_RING]; 70 int rx_fill; 71 int rx_empty; 72 struct sk_buff *tx_bufs[N_TX_RING]; 73 int tx_fill; 74 int tx_empty; 75 unsigned char tx_fullup; 76 struct timer_list tx_timeout; 77 int timeout_active; 78 int sleeping; 79 int opened; 80 unsigned short hash_use_count[64]; 81 unsigned short hash_table_mask[4]; 82 spinlock_t lock; 83 }; 84 85 #if 0 /* Move that to ethtool */ 86 87 typedef struct bmac_reg_entry { 88 char *name; 89 unsigned short reg_offset; 90 } bmac_reg_entry_t; 91 92 #define N_REG_ENTRIES 31 93 94 static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = { 95 {"MEMADD", MEMADD}, 96 {"MEMDATAHI", MEMDATAHI}, 97 {"MEMDATALO", MEMDATALO}, 98 {"TXPNTR", TXPNTR}, 99 {"RXPNTR", RXPNTR}, 100 {"IPG1", IPG1}, 101 {"IPG2", IPG2}, 102 {"ALIMIT", ALIMIT}, 103 {"SLOT", SLOT}, 104 {"PALEN", PALEN}, 105 {"PAPAT", PAPAT}, 106 {"TXSFD", TXSFD}, 107 {"JAM", JAM}, 108 {"TXCFG", TXCFG}, 109 {"TXMAX", TXMAX}, 110 {"TXMIN", TXMIN}, 111 {"PAREG", PAREG}, 112 {"DCNT", DCNT}, 113 {"NCCNT", NCCNT}, 114 {"NTCNT", NTCNT}, 115 {"EXCNT", EXCNT}, 116 {"LTCNT", LTCNT}, 117 {"TXSM", TXSM}, 118 {"RXCFG", RXCFG}, 119 {"RXMAX", RXMAX}, 120 {"RXMIN", RXMIN}, 121 {"FRCNT", FRCNT}, 122 {"AECNT", AECNT}, 123 {"FECNT", FECNT}, 124 {"RXSM", RXSM}, 125 {"RXCV", RXCV} 126 }; 127 128 #endif 129 130 static unsigned char *bmac_emergency_rxbuf; 131 132 /* 133 * Number of bytes of private data per BMAC: allow enough for 134 * the rx and tx dma commands plus a branch dma command each, 135 * and another 16 bytes to allow us to align the dma command 136 * buffers on a 16 byte boundary. 137 */ 138 #define PRIV_BYTES (sizeof(struct bmac_data) \ 139 + (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \ 140 + sizeof(struct sk_buff_head)) 141 142 static int bmac_open(struct net_device *dev); 143 static int bmac_close(struct net_device *dev); 144 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev); 145 static void bmac_set_multicast(struct net_device *dev); 146 static void bmac_reset_and_enable(struct net_device *dev); 147 static void bmac_start_chip(struct net_device *dev); 148 static void bmac_init_chip(struct net_device *dev); 149 static void bmac_init_registers(struct net_device *dev); 150 static void bmac_enable_and_reset_chip(struct net_device *dev); 151 static int bmac_set_address(struct net_device *dev, void *addr); 152 static irqreturn_t bmac_misc_intr(int irq, void *dev_id); 153 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id); 154 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id); 155 static void bmac_set_timeout(struct net_device *dev); 156 static void bmac_tx_timeout(struct timer_list *t); 157 static netdev_tx_t bmac_output(struct sk_buff *skb, struct net_device *dev); 158 static void bmac_start(struct net_device *dev); 159 160 #define DBDMA_SET(x) ( ((x) | (x) << 16) ) 161 #define DBDMA_CLEAR(x) ( (x) << 16) 162 163 static inline void 164 dbdma_st32(volatile __u32 __iomem *a, unsigned long x) 165 { 166 __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory"); 167 } 168 169 static inline unsigned long 170 dbdma_ld32(volatile __u32 __iomem *a) 171 { 172 __u32 swap; 173 __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a)); 174 return swap; 175 } 176 177 static void 178 dbdma_continue(volatile struct dbdma_regs __iomem *dmap) 179 { 180 dbdma_st32(&dmap->control, 181 DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD)); 182 eieio(); 183 } 184 185 static void 186 dbdma_reset(volatile struct dbdma_regs __iomem *dmap) 187 { 188 dbdma_st32(&dmap->control, 189 DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN)); 190 eieio(); 191 while (dbdma_ld32(&dmap->status) & RUN) 192 eieio(); 193 } 194 195 static void 196 dbdma_setcmd(volatile struct dbdma_cmd *cp, 197 unsigned short cmd, unsigned count, unsigned long addr, 198 unsigned long cmd_dep) 199 { 200 out_le16(&cp->command, cmd); 201 out_le16(&cp->req_count, count); 202 out_le32(&cp->phy_addr, addr); 203 out_le32(&cp->cmd_dep, cmd_dep); 204 out_le16(&cp->xfer_status, 0); 205 out_le16(&cp->res_count, 0); 206 } 207 208 static inline 209 void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data ) 210 { 211 out_le16((void __iomem *)dev->base_addr + reg_offset, data); 212 } 213 214 215 static inline 216 unsigned short bmread(struct net_device *dev, unsigned long reg_offset ) 217 { 218 return in_le16((void __iomem *)dev->base_addr + reg_offset); 219 } 220 221 static void 222 bmac_enable_and_reset_chip(struct net_device *dev) 223 { 224 struct bmac_data *bp = netdev_priv(dev); 225 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 226 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 227 228 if (rd) 229 dbdma_reset(rd); 230 if (td) 231 dbdma_reset(td); 232 233 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1); 234 } 235 236 #define MIFDELAY udelay(10) 237 238 static unsigned int 239 bmac_mif_readbits(struct net_device *dev, int nb) 240 { 241 unsigned int val = 0; 242 243 while (--nb >= 0) { 244 bmwrite(dev, MIFCSR, 0); 245 MIFDELAY; 246 if (bmread(dev, MIFCSR) & 8) 247 val |= 1 << nb; 248 bmwrite(dev, MIFCSR, 1); 249 MIFDELAY; 250 } 251 bmwrite(dev, MIFCSR, 0); 252 MIFDELAY; 253 bmwrite(dev, MIFCSR, 1); 254 MIFDELAY; 255 return val; 256 } 257 258 static void 259 bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb) 260 { 261 int b; 262 263 while (--nb >= 0) { 264 b = (val & (1 << nb))? 6: 4; 265 bmwrite(dev, MIFCSR, b); 266 MIFDELAY; 267 bmwrite(dev, MIFCSR, b|1); 268 MIFDELAY; 269 } 270 } 271 272 static unsigned int 273 bmac_mif_read(struct net_device *dev, unsigned int addr) 274 { 275 unsigned int val; 276 277 bmwrite(dev, MIFCSR, 4); 278 MIFDELAY; 279 bmac_mif_writebits(dev, ~0U, 32); 280 bmac_mif_writebits(dev, 6, 4); 281 bmac_mif_writebits(dev, addr, 10); 282 bmwrite(dev, MIFCSR, 2); 283 MIFDELAY; 284 bmwrite(dev, MIFCSR, 1); 285 MIFDELAY; 286 val = bmac_mif_readbits(dev, 17); 287 bmwrite(dev, MIFCSR, 4); 288 MIFDELAY; 289 return val; 290 } 291 292 static void 293 bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val) 294 { 295 bmwrite(dev, MIFCSR, 4); 296 MIFDELAY; 297 bmac_mif_writebits(dev, ~0U, 32); 298 bmac_mif_writebits(dev, 5, 4); 299 bmac_mif_writebits(dev, addr, 10); 300 bmac_mif_writebits(dev, 2, 2); 301 bmac_mif_writebits(dev, val, 16); 302 bmac_mif_writebits(dev, 3, 2); 303 } 304 305 static void 306 bmac_init_registers(struct net_device *dev) 307 { 308 struct bmac_data *bp = netdev_priv(dev); 309 volatile unsigned short regValue; 310 const unsigned short *pWord16; 311 int i; 312 313 /* XXDEBUG(("bmac: enter init_registers\n")); */ 314 315 bmwrite(dev, RXRST, RxResetValue); 316 bmwrite(dev, TXRST, TxResetBit); 317 318 i = 100; 319 do { 320 --i; 321 udelay(10000); 322 regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */ 323 } while ((regValue & TxResetBit) && i > 0); 324 325 if (!bp->is_bmac_plus) { 326 regValue = bmread(dev, XCVRIF); 327 regValue |= ClkBit | SerialMode | COLActiveLow; 328 bmwrite(dev, XCVRIF, regValue); 329 udelay(10000); 330 } 331 332 bmwrite(dev, RSEED, (unsigned short)0x1968); 333 334 regValue = bmread(dev, XIFC); 335 regValue |= TxOutputEnable; 336 bmwrite(dev, XIFC, regValue); 337 338 bmread(dev, PAREG); 339 340 /* set collision counters to 0 */ 341 bmwrite(dev, NCCNT, 0); 342 bmwrite(dev, NTCNT, 0); 343 bmwrite(dev, EXCNT, 0); 344 bmwrite(dev, LTCNT, 0); 345 346 /* set rx counters to 0 */ 347 bmwrite(dev, FRCNT, 0); 348 bmwrite(dev, LECNT, 0); 349 bmwrite(dev, AECNT, 0); 350 bmwrite(dev, FECNT, 0); 351 bmwrite(dev, RXCV, 0); 352 353 /* set tx fifo information */ 354 bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */ 355 356 bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */ 357 bmwrite(dev, TXFIFOCSR, TxFIFOEnable ); 358 359 /* set rx fifo information */ 360 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */ 361 bmwrite(dev, RXFIFOCSR, RxFIFOEnable ); 362 363 //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */ 364 bmread(dev, STATUS); /* read it just to clear it */ 365 366 /* zero out the chip Hash Filter registers */ 367 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0; 368 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */ 369 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */ 370 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */ 371 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */ 372 373 pWord16 = (const unsigned short *)dev->dev_addr; 374 bmwrite(dev, MADD0, *pWord16++); 375 bmwrite(dev, MADD1, *pWord16++); 376 bmwrite(dev, MADD2, *pWord16); 377 378 bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets); 379 380 bmwrite(dev, INTDISABLE, EnableNormal); 381 } 382 383 #if 0 384 static void 385 bmac_disable_interrupts(struct net_device *dev) 386 { 387 bmwrite(dev, INTDISABLE, DisableAll); 388 } 389 390 static void 391 bmac_enable_interrupts(struct net_device *dev) 392 { 393 bmwrite(dev, INTDISABLE, EnableNormal); 394 } 395 #endif 396 397 398 static void 399 bmac_start_chip(struct net_device *dev) 400 { 401 struct bmac_data *bp = netdev_priv(dev); 402 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 403 unsigned short oldConfig; 404 405 /* enable rx dma channel */ 406 dbdma_continue(rd); 407 408 oldConfig = bmread(dev, TXCFG); 409 bmwrite(dev, TXCFG, oldConfig | TxMACEnable ); 410 411 /* turn on rx plus any other bits already on (promiscuous possibly) */ 412 oldConfig = bmread(dev, RXCFG); 413 bmwrite(dev, RXCFG, oldConfig | RxMACEnable ); 414 udelay(20000); 415 } 416 417 static void 418 bmac_init_phy(struct net_device *dev) 419 { 420 unsigned int addr; 421 struct bmac_data *bp = netdev_priv(dev); 422 423 printk(KERN_DEBUG "phy registers:"); 424 for (addr = 0; addr < 32; ++addr) { 425 if ((addr & 7) == 0) 426 printk(KERN_DEBUG); 427 printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr)); 428 } 429 printk(KERN_CONT "\n"); 430 431 if (bp->is_bmac_plus) { 432 unsigned int capable, ctrl; 433 434 ctrl = bmac_mif_read(dev, 0); 435 capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1; 436 if (bmac_mif_read(dev, 4) != capable || 437 (ctrl & 0x1000) == 0) { 438 bmac_mif_write(dev, 4, capable); 439 bmac_mif_write(dev, 0, 0x1200); 440 } else 441 bmac_mif_write(dev, 0, 0x1000); 442 } 443 } 444 445 static void bmac_init_chip(struct net_device *dev) 446 { 447 bmac_init_phy(dev); 448 bmac_init_registers(dev); 449 } 450 451 #ifdef CONFIG_PM 452 static int bmac_suspend(struct macio_dev *mdev, pm_message_t state) 453 { 454 struct net_device* dev = macio_get_drvdata(mdev); 455 struct bmac_data *bp = netdev_priv(dev); 456 unsigned long flags; 457 unsigned short config; 458 int i; 459 460 netif_device_detach(dev); 461 /* prolly should wait for dma to finish & turn off the chip */ 462 spin_lock_irqsave(&bp->lock, flags); 463 if (bp->timeout_active) { 464 del_timer(&bp->tx_timeout); 465 bp->timeout_active = 0; 466 } 467 disable_irq(dev->irq); 468 disable_irq(bp->tx_dma_intr); 469 disable_irq(bp->rx_dma_intr); 470 bp->sleeping = 1; 471 spin_unlock_irqrestore(&bp->lock, flags); 472 if (bp->opened) { 473 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 474 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 475 476 config = bmread(dev, RXCFG); 477 bmwrite(dev, RXCFG, (config & ~RxMACEnable)); 478 config = bmread(dev, TXCFG); 479 bmwrite(dev, TXCFG, (config & ~TxMACEnable)); 480 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */ 481 /* disable rx and tx dma */ 482 rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ 483 td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ 484 /* free some skb's */ 485 for (i=0; i<N_RX_RING; i++) { 486 if (bp->rx_bufs[i] != NULL) { 487 dev_kfree_skb(bp->rx_bufs[i]); 488 bp->rx_bufs[i] = NULL; 489 } 490 } 491 for (i = 0; i<N_TX_RING; i++) { 492 if (bp->tx_bufs[i] != NULL) { 493 dev_kfree_skb(bp->tx_bufs[i]); 494 bp->tx_bufs[i] = NULL; 495 } 496 } 497 } 498 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); 499 return 0; 500 } 501 502 static int bmac_resume(struct macio_dev *mdev) 503 { 504 struct net_device* dev = macio_get_drvdata(mdev); 505 struct bmac_data *bp = netdev_priv(dev); 506 507 /* see if this is enough */ 508 if (bp->opened) 509 bmac_reset_and_enable(dev); 510 511 enable_irq(dev->irq); 512 enable_irq(bp->tx_dma_intr); 513 enable_irq(bp->rx_dma_intr); 514 netif_device_attach(dev); 515 516 return 0; 517 } 518 #endif /* CONFIG_PM */ 519 520 static int bmac_set_address(struct net_device *dev, void *addr) 521 { 522 struct bmac_data *bp = netdev_priv(dev); 523 const unsigned short *pWord16; 524 unsigned long flags; 525 526 XXDEBUG(("bmac: enter set_address\n")); 527 spin_lock_irqsave(&bp->lock, flags); 528 529 eth_hw_addr_set(dev, addr); 530 531 /* load up the hardware address */ 532 pWord16 = (const unsigned short *)dev->dev_addr; 533 bmwrite(dev, MADD0, *pWord16++); 534 bmwrite(dev, MADD1, *pWord16++); 535 bmwrite(dev, MADD2, *pWord16); 536 537 spin_unlock_irqrestore(&bp->lock, flags); 538 XXDEBUG(("bmac: exit set_address\n")); 539 return 0; 540 } 541 542 static inline void bmac_set_timeout(struct net_device *dev) 543 { 544 struct bmac_data *bp = netdev_priv(dev); 545 unsigned long flags; 546 547 spin_lock_irqsave(&bp->lock, flags); 548 if (bp->timeout_active) 549 del_timer(&bp->tx_timeout); 550 bp->tx_timeout.expires = jiffies + TX_TIMEOUT; 551 add_timer(&bp->tx_timeout); 552 bp->timeout_active = 1; 553 spin_unlock_irqrestore(&bp->lock, flags); 554 } 555 556 static void 557 bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp) 558 { 559 void *vaddr; 560 unsigned long baddr; 561 unsigned long len; 562 563 len = skb->len; 564 vaddr = skb->data; 565 baddr = virt_to_bus(vaddr); 566 567 dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0); 568 } 569 570 static void 571 bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp) 572 { 573 unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf; 574 575 dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN, 576 virt_to_bus(addr), 0); 577 } 578 579 static void 580 bmac_init_tx_ring(struct bmac_data *bp) 581 { 582 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 583 584 memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd)); 585 586 bp->tx_empty = 0; 587 bp->tx_fill = 0; 588 bp->tx_fullup = 0; 589 590 /* put a branch at the end of the tx command list */ 591 dbdma_setcmd(&bp->tx_cmds[N_TX_RING], 592 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds)); 593 594 /* reset tx dma */ 595 dbdma_reset(td); 596 out_le32(&td->wait_sel, 0x00200020); 597 out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds)); 598 } 599 600 static int 601 bmac_init_rx_ring(struct net_device *dev) 602 { 603 struct bmac_data *bp = netdev_priv(dev); 604 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 605 int i; 606 struct sk_buff *skb; 607 608 /* initialize list of sk_buffs for receiving and set up recv dma */ 609 memset((char *)bp->rx_cmds, 0, 610 (N_RX_RING + 1) * sizeof(struct dbdma_cmd)); 611 for (i = 0; i < N_RX_RING; i++) { 612 if ((skb = bp->rx_bufs[i]) == NULL) { 613 bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); 614 if (skb != NULL) 615 skb_reserve(skb, 2); 616 } 617 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]); 618 } 619 620 bp->rx_empty = 0; 621 bp->rx_fill = i; 622 623 /* Put a branch back to the beginning of the receive command list */ 624 dbdma_setcmd(&bp->rx_cmds[N_RX_RING], 625 (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds)); 626 627 /* start rx dma */ 628 dbdma_reset(rd); 629 out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds)); 630 631 return 1; 632 } 633 634 635 static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev) 636 { 637 struct bmac_data *bp = netdev_priv(dev); 638 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 639 int i; 640 641 /* see if there's a free slot in the tx ring */ 642 /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */ 643 /* bp->tx_empty, bp->tx_fill)); */ 644 i = bp->tx_fill + 1; 645 if (i >= N_TX_RING) 646 i = 0; 647 if (i == bp->tx_empty) { 648 netif_stop_queue(dev); 649 bp->tx_fullup = 1; 650 XXDEBUG(("bmac_transmit_packet: tx ring full\n")); 651 return -1; /* can't take it at the moment */ 652 } 653 654 dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0); 655 656 bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]); 657 658 bp->tx_bufs[bp->tx_fill] = skb; 659 bp->tx_fill = i; 660 661 dev->stats.tx_bytes += skb->len; 662 663 dbdma_continue(td); 664 665 return 0; 666 } 667 668 static int rxintcount; 669 670 static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id) 671 { 672 struct net_device *dev = (struct net_device *) dev_id; 673 struct bmac_data *bp = netdev_priv(dev); 674 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 675 volatile struct dbdma_cmd *cp; 676 int i, nb, stat; 677 struct sk_buff *skb; 678 unsigned int residual; 679 int last; 680 unsigned long flags; 681 682 spin_lock_irqsave(&bp->lock, flags); 683 684 if (++rxintcount < 10) { 685 XXDEBUG(("bmac_rxdma_intr\n")); 686 } 687 688 last = -1; 689 i = bp->rx_empty; 690 691 while (1) { 692 cp = &bp->rx_cmds[i]; 693 stat = le16_to_cpu(cp->xfer_status); 694 residual = le16_to_cpu(cp->res_count); 695 if ((stat & ACTIVE) == 0) 696 break; 697 nb = RX_BUFLEN - residual - 2; 698 if (nb < (ETHERMINPACKET - ETHERCRC)) { 699 skb = NULL; 700 dev->stats.rx_length_errors++; 701 dev->stats.rx_errors++; 702 } else { 703 skb = bp->rx_bufs[i]; 704 bp->rx_bufs[i] = NULL; 705 } 706 if (skb != NULL) { 707 nb -= ETHERCRC; 708 skb_put(skb, nb); 709 skb->protocol = eth_type_trans(skb, dev); 710 netif_rx(skb); 711 ++dev->stats.rx_packets; 712 dev->stats.rx_bytes += nb; 713 } else { 714 ++dev->stats.rx_dropped; 715 } 716 if ((skb = bp->rx_bufs[i]) == NULL) { 717 bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); 718 if (skb != NULL) 719 skb_reserve(bp->rx_bufs[i], 2); 720 } 721 bmac_construct_rxbuff(skb, &bp->rx_cmds[i]); 722 cp->res_count = cpu_to_le16(0); 723 cp->xfer_status = cpu_to_le16(0); 724 last = i; 725 if (++i >= N_RX_RING) i = 0; 726 } 727 728 if (last != -1) { 729 bp->rx_fill = last; 730 bp->rx_empty = i; 731 } 732 733 dbdma_continue(rd); 734 spin_unlock_irqrestore(&bp->lock, flags); 735 736 if (rxintcount < 10) { 737 XXDEBUG(("bmac_rxdma_intr done\n")); 738 } 739 return IRQ_HANDLED; 740 } 741 742 static int txintcount; 743 744 static irqreturn_t bmac_txdma_intr(int irq, void *dev_id) 745 { 746 struct net_device *dev = (struct net_device *) dev_id; 747 struct bmac_data *bp = netdev_priv(dev); 748 volatile struct dbdma_cmd *cp; 749 int stat; 750 unsigned long flags; 751 752 spin_lock_irqsave(&bp->lock, flags); 753 754 if (txintcount++ < 10) { 755 XXDEBUG(("bmac_txdma_intr\n")); 756 } 757 758 /* del_timer(&bp->tx_timeout); */ 759 /* bp->timeout_active = 0; */ 760 761 while (1) { 762 cp = &bp->tx_cmds[bp->tx_empty]; 763 stat = le16_to_cpu(cp->xfer_status); 764 if (txintcount < 10) { 765 XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat)); 766 } 767 if (!(stat & ACTIVE)) { 768 /* 769 * status field might not have been filled by DBDMA 770 */ 771 if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr))) 772 break; 773 } 774 775 if (bp->tx_bufs[bp->tx_empty]) { 776 ++dev->stats.tx_packets; 777 dev_consume_skb_irq(bp->tx_bufs[bp->tx_empty]); 778 } 779 bp->tx_bufs[bp->tx_empty] = NULL; 780 bp->tx_fullup = 0; 781 netif_wake_queue(dev); 782 if (++bp->tx_empty >= N_TX_RING) 783 bp->tx_empty = 0; 784 if (bp->tx_empty == bp->tx_fill) 785 break; 786 } 787 788 spin_unlock_irqrestore(&bp->lock, flags); 789 790 if (txintcount < 10) { 791 XXDEBUG(("bmac_txdma_intr done->bmac_start\n")); 792 } 793 794 bmac_start(dev); 795 return IRQ_HANDLED; 796 } 797 798 #ifndef SUNHME_MULTICAST 799 /* Real fast bit-reversal algorithm, 6-bit values */ 800 static int reverse6[64] = { 801 0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38, 802 0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c, 803 0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a, 804 0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e, 805 0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39, 806 0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d, 807 0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b, 808 0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f 809 }; 810 811 static unsigned int 812 crc416(unsigned int curval, unsigned short nxtval) 813 { 814 unsigned int counter, cur = curval, next = nxtval; 815 int high_crc_set, low_data_set; 816 817 /* Swap bytes */ 818 next = ((next & 0x00FF) << 8) | (next >> 8); 819 820 /* Compute bit-by-bit */ 821 for (counter = 0; counter < 16; ++counter) { 822 /* is high CRC bit set? */ 823 if ((cur & 0x80000000) == 0) high_crc_set = 0; 824 else high_crc_set = 1; 825 826 cur = cur << 1; 827 828 if ((next & 0x0001) == 0) low_data_set = 0; 829 else low_data_set = 1; 830 831 next = next >> 1; 832 833 /* do the XOR */ 834 if (high_crc_set ^ low_data_set) cur = cur ^ CRC32_POLY_BE; 835 } 836 return cur; 837 } 838 839 static unsigned int 840 bmac_crc(unsigned short *address) 841 { 842 unsigned int newcrc; 843 844 XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2])); 845 newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */ 846 newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */ 847 newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */ 848 849 return(newcrc); 850 } 851 852 /* 853 * Add requested mcast addr to BMac's hash table filter. 854 * 855 */ 856 857 static void 858 bmac_addhash(struct bmac_data *bp, unsigned char *addr) 859 { 860 unsigned int crc; 861 unsigned short mask; 862 863 if (!(*addr)) return; 864 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */ 865 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */ 866 if (bp->hash_use_count[crc]++) return; /* This bit is already set */ 867 mask = crc % 16; 868 mask = (unsigned char)1 << mask; 869 bp->hash_use_count[crc/16] |= mask; 870 } 871 872 static void 873 bmac_removehash(struct bmac_data *bp, unsigned char *addr) 874 { 875 unsigned int crc; 876 unsigned char mask; 877 878 /* Now, delete the address from the filter copy, as indicated */ 879 crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */ 880 crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */ 881 if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */ 882 if (--bp->hash_use_count[crc]) return; /* That bit is still in use */ 883 mask = crc % 16; 884 mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */ 885 bp->hash_table_mask[crc/16] &= mask; 886 } 887 888 /* 889 * Sync the adapter with the software copy of the multicast mask 890 * (logical address filter). 891 */ 892 893 static void 894 bmac_rx_off(struct net_device *dev) 895 { 896 unsigned short rx_cfg; 897 898 rx_cfg = bmread(dev, RXCFG); 899 rx_cfg &= ~RxMACEnable; 900 bmwrite(dev, RXCFG, rx_cfg); 901 do { 902 rx_cfg = bmread(dev, RXCFG); 903 } while (rx_cfg & RxMACEnable); 904 } 905 906 unsigned short 907 bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable) 908 { 909 unsigned short rx_cfg; 910 911 rx_cfg = bmread(dev, RXCFG); 912 rx_cfg |= RxMACEnable; 913 if (hash_enable) rx_cfg |= RxHashFilterEnable; 914 else rx_cfg &= ~RxHashFilterEnable; 915 if (promisc_enable) rx_cfg |= RxPromiscEnable; 916 else rx_cfg &= ~RxPromiscEnable; 917 bmwrite(dev, RXRST, RxResetValue); 918 bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */ 919 bmwrite(dev, RXFIFOCSR, RxFIFOEnable ); 920 bmwrite(dev, RXCFG, rx_cfg ); 921 return rx_cfg; 922 } 923 924 static void 925 bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp) 926 { 927 bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */ 928 bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */ 929 bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */ 930 bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */ 931 } 932 933 #if 0 934 static void 935 bmac_add_multi(struct net_device *dev, 936 struct bmac_data *bp, unsigned char *addr) 937 { 938 /* XXDEBUG(("bmac: enter bmac_add_multi\n")); */ 939 bmac_addhash(bp, addr); 940 bmac_rx_off(dev); 941 bmac_update_hash_table_mask(dev, bp); 942 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0); 943 /* XXDEBUG(("bmac: exit bmac_add_multi\n")); */ 944 } 945 946 static void 947 bmac_remove_multi(struct net_device *dev, 948 struct bmac_data *bp, unsigned char *addr) 949 { 950 bmac_removehash(bp, addr); 951 bmac_rx_off(dev); 952 bmac_update_hash_table_mask(dev, bp); 953 bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0); 954 } 955 #endif 956 957 /* Set or clear the multicast filter for this adaptor. 958 num_addrs == -1 Promiscuous mode, receive all packets 959 num_addrs == 0 Normal mode, clear multicast list 960 num_addrs > 0 Multicast mode, receive normal and MC packets, and do 961 best-effort filtering. 962 */ 963 static void bmac_set_multicast(struct net_device *dev) 964 { 965 struct netdev_hw_addr *ha; 966 struct bmac_data *bp = netdev_priv(dev); 967 int num_addrs = netdev_mc_count(dev); 968 unsigned short rx_cfg; 969 int i; 970 971 if (bp->sleeping) 972 return; 973 974 XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs)); 975 976 if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { 977 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff; 978 bmac_update_hash_table_mask(dev, bp); 979 rx_cfg = bmac_rx_on(dev, 1, 0); 980 XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n")); 981 } else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) { 982 rx_cfg = bmread(dev, RXCFG); 983 rx_cfg |= RxPromiscEnable; 984 bmwrite(dev, RXCFG, rx_cfg); 985 rx_cfg = bmac_rx_on(dev, 0, 1); 986 XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg)); 987 } else { 988 for (i=0; i<4; i++) bp->hash_table_mask[i] = 0; 989 for (i=0; i<64; i++) bp->hash_use_count[i] = 0; 990 if (num_addrs == 0) { 991 rx_cfg = bmac_rx_on(dev, 0, 0); 992 XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg)); 993 } else { 994 netdev_for_each_mc_addr(ha, dev) 995 bmac_addhash(bp, ha->addr); 996 bmac_update_hash_table_mask(dev, bp); 997 rx_cfg = bmac_rx_on(dev, 1, 0); 998 XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg)); 999 } 1000 } 1001 /* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */ 1002 } 1003 #else /* ifdef SUNHME_MULTICAST */ 1004 1005 /* The version of set_multicast below was lifted from sunhme.c */ 1006 1007 static void bmac_set_multicast(struct net_device *dev) 1008 { 1009 struct netdev_hw_addr *ha; 1010 unsigned short rx_cfg; 1011 u32 crc; 1012 1013 if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { 1014 bmwrite(dev, BHASH0, 0xffff); 1015 bmwrite(dev, BHASH1, 0xffff); 1016 bmwrite(dev, BHASH2, 0xffff); 1017 bmwrite(dev, BHASH3, 0xffff); 1018 } else if(dev->flags & IFF_PROMISC) { 1019 rx_cfg = bmread(dev, RXCFG); 1020 rx_cfg |= RxPromiscEnable; 1021 bmwrite(dev, RXCFG, rx_cfg); 1022 } else { 1023 u16 hash_table[4] = { 0 }; 1024 1025 rx_cfg = bmread(dev, RXCFG); 1026 rx_cfg &= ~RxPromiscEnable; 1027 bmwrite(dev, RXCFG, rx_cfg); 1028 1029 netdev_for_each_mc_addr(ha, dev) { 1030 crc = ether_crc_le(6, ha->addr); 1031 crc >>= 26; 1032 hash_table[crc >> 4] |= 1 << (crc & 0xf); 1033 } 1034 bmwrite(dev, BHASH0, hash_table[0]); 1035 bmwrite(dev, BHASH1, hash_table[1]); 1036 bmwrite(dev, BHASH2, hash_table[2]); 1037 bmwrite(dev, BHASH3, hash_table[3]); 1038 } 1039 } 1040 #endif /* SUNHME_MULTICAST */ 1041 1042 static int miscintcount; 1043 1044 static irqreturn_t bmac_misc_intr(int irq, void *dev_id) 1045 { 1046 struct net_device *dev = (struct net_device *) dev_id; 1047 unsigned int status = bmread(dev, STATUS); 1048 if (miscintcount++ < 10) { 1049 XXDEBUG(("bmac_misc_intr\n")); 1050 } 1051 /* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */ 1052 /* bmac_txdma_intr_inner(irq, dev_id); */ 1053 /* if (status & FrameReceived) dev->stats.rx_dropped++; */ 1054 if (status & RxErrorMask) dev->stats.rx_errors++; 1055 if (status & RxCRCCntExp) dev->stats.rx_crc_errors++; 1056 if (status & RxLenCntExp) dev->stats.rx_length_errors++; 1057 if (status & RxOverFlow) dev->stats.rx_over_errors++; 1058 if (status & RxAlignCntExp) dev->stats.rx_frame_errors++; 1059 1060 /* if (status & FrameSent) dev->stats.tx_dropped++; */ 1061 if (status & TxErrorMask) dev->stats.tx_errors++; 1062 if (status & TxUnderrun) dev->stats.tx_fifo_errors++; 1063 if (status & TxNormalCollExp) dev->stats.collisions++; 1064 return IRQ_HANDLED; 1065 } 1066 1067 /* 1068 * Procedure for reading EEPROM 1069 */ 1070 #define SROMAddressLength 5 1071 #define DataInOn 0x0008 1072 #define DataInOff 0x0000 1073 #define Clk 0x0002 1074 #define ChipSelect 0x0001 1075 #define SDIShiftCount 3 1076 #define SD0ShiftCount 2 1077 #define DelayValue 1000 /* number of microseconds */ 1078 #define SROMStartOffset 10 /* this is in words */ 1079 #define SROMReadCount 3 /* number of words to read from SROM */ 1080 #define SROMAddressBits 6 1081 #define EnetAddressOffset 20 1082 1083 static unsigned char 1084 bmac_clock_out_bit(struct net_device *dev) 1085 { 1086 unsigned short data; 1087 unsigned short val; 1088 1089 bmwrite(dev, SROMCSR, ChipSelect | Clk); 1090 udelay(DelayValue); 1091 1092 data = bmread(dev, SROMCSR); 1093 udelay(DelayValue); 1094 val = (data >> SD0ShiftCount) & 1; 1095 1096 bmwrite(dev, SROMCSR, ChipSelect); 1097 udelay(DelayValue); 1098 1099 return val; 1100 } 1101 1102 static void 1103 bmac_clock_in_bit(struct net_device *dev, unsigned int val) 1104 { 1105 unsigned short data; 1106 1107 if (val != 0 && val != 1) return; 1108 1109 data = (val << SDIShiftCount); 1110 bmwrite(dev, SROMCSR, data | ChipSelect ); 1111 udelay(DelayValue); 1112 1113 bmwrite(dev, SROMCSR, data | ChipSelect | Clk ); 1114 udelay(DelayValue); 1115 1116 bmwrite(dev, SROMCSR, data | ChipSelect); 1117 udelay(DelayValue); 1118 } 1119 1120 static void 1121 reset_and_select_srom(struct net_device *dev) 1122 { 1123 /* first reset */ 1124 bmwrite(dev, SROMCSR, 0); 1125 udelay(DelayValue); 1126 1127 /* send it the read command (110) */ 1128 bmac_clock_in_bit(dev, 1); 1129 bmac_clock_in_bit(dev, 1); 1130 bmac_clock_in_bit(dev, 0); 1131 } 1132 1133 static unsigned short 1134 read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len) 1135 { 1136 unsigned short data, val; 1137 int i; 1138 1139 /* send out the address we want to read from */ 1140 for (i = 0; i < addr_len; i++) { 1141 val = addr >> (addr_len-i-1); 1142 bmac_clock_in_bit(dev, val & 1); 1143 } 1144 1145 /* Now read in the 16-bit data */ 1146 data = 0; 1147 for (i = 0; i < 16; i++) { 1148 val = bmac_clock_out_bit(dev); 1149 data <<= 1; 1150 data |= val; 1151 } 1152 bmwrite(dev, SROMCSR, 0); 1153 1154 return data; 1155 } 1156 1157 /* 1158 * It looks like Cogent and SMC use different methods for calculating 1159 * checksums. What a pain.. 1160 */ 1161 1162 static int 1163 bmac_verify_checksum(struct net_device *dev) 1164 { 1165 unsigned short data, storedCS; 1166 1167 reset_and_select_srom(dev); 1168 data = read_srom(dev, 3, SROMAddressBits); 1169 storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00); 1170 1171 return 0; 1172 } 1173 1174 1175 static void 1176 bmac_get_station_address(struct net_device *dev, unsigned char *ea) 1177 { 1178 int i; 1179 unsigned short data; 1180 1181 for (i = 0; i < 3; i++) 1182 { 1183 reset_and_select_srom(dev); 1184 data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits); 1185 ea[2*i] = bitrev8(data & 0x0ff); 1186 ea[2*i+1] = bitrev8((data >> 8) & 0x0ff); 1187 } 1188 } 1189 1190 static void bmac_reset_and_enable(struct net_device *dev) 1191 { 1192 struct bmac_data *bp = netdev_priv(dev); 1193 unsigned long flags; 1194 struct sk_buff *skb; 1195 unsigned char *data; 1196 1197 spin_lock_irqsave(&bp->lock, flags); 1198 bmac_enable_and_reset_chip(dev); 1199 bmac_init_tx_ring(bp); 1200 bmac_init_rx_ring(dev); 1201 bmac_init_chip(dev); 1202 bmac_start_chip(dev); 1203 bmwrite(dev, INTDISABLE, EnableNormal); 1204 bp->sleeping = 0; 1205 1206 /* 1207 * It seems that the bmac can't receive until it's transmitted 1208 * a packet. So we give it a dummy packet to transmit. 1209 */ 1210 skb = netdev_alloc_skb(dev, ETHERMINPACKET); 1211 if (skb != NULL) { 1212 data = skb_put_zero(skb, ETHERMINPACKET); 1213 memcpy(data, dev->dev_addr, ETH_ALEN); 1214 memcpy(data + ETH_ALEN, dev->dev_addr, ETH_ALEN); 1215 bmac_transmit_packet(skb, dev); 1216 } 1217 spin_unlock_irqrestore(&bp->lock, flags); 1218 } 1219 1220 static const struct ethtool_ops bmac_ethtool_ops = { 1221 .get_link = ethtool_op_get_link, 1222 }; 1223 1224 static const struct net_device_ops bmac_netdev_ops = { 1225 .ndo_open = bmac_open, 1226 .ndo_stop = bmac_close, 1227 .ndo_start_xmit = bmac_output, 1228 .ndo_set_rx_mode = bmac_set_multicast, 1229 .ndo_set_mac_address = bmac_set_address, 1230 .ndo_validate_addr = eth_validate_addr, 1231 }; 1232 1233 static int bmac_probe(struct macio_dev *mdev, const struct of_device_id *match) 1234 { 1235 int j, rev, ret; 1236 struct bmac_data *bp; 1237 const unsigned char *prop_addr; 1238 unsigned char addr[6]; 1239 u8 macaddr[6]; 1240 struct net_device *dev; 1241 int is_bmac_plus = ((int)match->data) != 0; 1242 1243 if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) { 1244 printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n"); 1245 return -ENODEV; 1246 } 1247 prop_addr = of_get_property(macio_get_of_node(mdev), 1248 "mac-address", NULL); 1249 if (prop_addr == NULL) { 1250 prop_addr = of_get_property(macio_get_of_node(mdev), 1251 "local-mac-address", NULL); 1252 if (prop_addr == NULL) { 1253 printk(KERN_ERR "BMAC: Can't get mac-address\n"); 1254 return -ENODEV; 1255 } 1256 } 1257 memcpy(addr, prop_addr, sizeof(addr)); 1258 1259 dev = alloc_etherdev(PRIV_BYTES); 1260 if (!dev) 1261 return -ENOMEM; 1262 1263 bp = netdev_priv(dev); 1264 SET_NETDEV_DEV(dev, &mdev->ofdev.dev); 1265 macio_set_drvdata(mdev, dev); 1266 1267 bp->mdev = mdev; 1268 spin_lock_init(&bp->lock); 1269 1270 if (macio_request_resources(mdev, "bmac")) { 1271 printk(KERN_ERR "BMAC: can't request IO resource !\n"); 1272 goto out_free; 1273 } 1274 1275 dev->base_addr = (unsigned long) 1276 ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0)); 1277 if (dev->base_addr == 0) 1278 goto out_release; 1279 1280 dev->irq = macio_irq(mdev, 0); 1281 1282 bmac_enable_and_reset_chip(dev); 1283 bmwrite(dev, INTDISABLE, DisableAll); 1284 1285 rev = addr[0] == 0 && addr[1] == 0xA0; 1286 for (j = 0; j < 6; ++j) 1287 macaddr[j] = rev ? bitrev8(addr[j]): addr[j]; 1288 1289 eth_hw_addr_set(dev, macaddr); 1290 1291 /* Enable chip without interrupts for now */ 1292 bmac_enable_and_reset_chip(dev); 1293 bmwrite(dev, INTDISABLE, DisableAll); 1294 1295 dev->netdev_ops = &bmac_netdev_ops; 1296 dev->ethtool_ops = &bmac_ethtool_ops; 1297 1298 bmac_get_station_address(dev, addr); 1299 if (bmac_verify_checksum(dev) != 0) 1300 goto err_out_iounmap; 1301 1302 bp->is_bmac_plus = is_bmac_plus; 1303 bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1)); 1304 if (!bp->tx_dma) 1305 goto err_out_iounmap; 1306 bp->tx_dma_intr = macio_irq(mdev, 1); 1307 bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2)); 1308 if (!bp->rx_dma) 1309 goto err_out_iounmap_tx; 1310 bp->rx_dma_intr = macio_irq(mdev, 2); 1311 1312 bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1); 1313 bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1; 1314 1315 bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1); 1316 skb_queue_head_init(bp->queue); 1317 1318 timer_setup(&bp->tx_timeout, bmac_tx_timeout, 0); 1319 1320 ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev); 1321 if (ret) { 1322 printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq); 1323 goto err_out_iounmap_rx; 1324 } 1325 ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev); 1326 if (ret) { 1327 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr); 1328 goto err_out_irq0; 1329 } 1330 ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev); 1331 if (ret) { 1332 printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr); 1333 goto err_out_irq1; 1334 } 1335 1336 /* Mask chip interrupts and disable chip, will be 1337 * re-enabled on open() 1338 */ 1339 disable_irq(dev->irq); 1340 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); 1341 1342 if (register_netdev(dev) != 0) { 1343 printk(KERN_ERR "BMAC: Ethernet registration failed\n"); 1344 goto err_out_irq2; 1345 } 1346 1347 printk(KERN_INFO "%s: BMAC%s at %pM", 1348 dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr); 1349 XXDEBUG((", base_addr=%#0lx", dev->base_addr)); 1350 printk("\n"); 1351 1352 return 0; 1353 1354 err_out_irq2: 1355 free_irq(bp->rx_dma_intr, dev); 1356 err_out_irq1: 1357 free_irq(bp->tx_dma_intr, dev); 1358 err_out_irq0: 1359 free_irq(dev->irq, dev); 1360 err_out_iounmap_rx: 1361 iounmap(bp->rx_dma); 1362 err_out_iounmap_tx: 1363 iounmap(bp->tx_dma); 1364 err_out_iounmap: 1365 iounmap((void __iomem *)dev->base_addr); 1366 out_release: 1367 macio_release_resources(mdev); 1368 out_free: 1369 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); 1370 free_netdev(dev); 1371 1372 return -ENODEV; 1373 } 1374 1375 static int bmac_open(struct net_device *dev) 1376 { 1377 struct bmac_data *bp = netdev_priv(dev); 1378 /* XXDEBUG(("bmac: enter open\n")); */ 1379 /* reset the chip */ 1380 bp->opened = 1; 1381 bmac_reset_and_enable(dev); 1382 enable_irq(dev->irq); 1383 return 0; 1384 } 1385 1386 static int bmac_close(struct net_device *dev) 1387 { 1388 struct bmac_data *bp = netdev_priv(dev); 1389 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 1390 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 1391 unsigned short config; 1392 int i; 1393 1394 bp->sleeping = 1; 1395 1396 /* disable rx and tx */ 1397 config = bmread(dev, RXCFG); 1398 bmwrite(dev, RXCFG, (config & ~RxMACEnable)); 1399 1400 config = bmread(dev, TXCFG); 1401 bmwrite(dev, TXCFG, (config & ~TxMACEnable)); 1402 1403 bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */ 1404 1405 /* disable rx and tx dma */ 1406 rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ 1407 td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ 1408 1409 /* free some skb's */ 1410 XXDEBUG(("bmac: free rx bufs\n")); 1411 for (i=0; i<N_RX_RING; i++) { 1412 if (bp->rx_bufs[i] != NULL) { 1413 dev_kfree_skb(bp->rx_bufs[i]); 1414 bp->rx_bufs[i] = NULL; 1415 } 1416 } 1417 XXDEBUG(("bmac: free tx bufs\n")); 1418 for (i = 0; i<N_TX_RING; i++) { 1419 if (bp->tx_bufs[i] != NULL) { 1420 dev_kfree_skb(bp->tx_bufs[i]); 1421 bp->tx_bufs[i] = NULL; 1422 } 1423 } 1424 XXDEBUG(("bmac: all bufs freed\n")); 1425 1426 bp->opened = 0; 1427 disable_irq(dev->irq); 1428 pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); 1429 1430 return 0; 1431 } 1432 1433 static void 1434 bmac_start(struct net_device *dev) 1435 { 1436 struct bmac_data *bp = netdev_priv(dev); 1437 int i; 1438 struct sk_buff *skb; 1439 unsigned long flags; 1440 1441 if (bp->sleeping) 1442 return; 1443 1444 spin_lock_irqsave(&bp->lock, flags); 1445 while (1) { 1446 i = bp->tx_fill + 1; 1447 if (i >= N_TX_RING) 1448 i = 0; 1449 if (i == bp->tx_empty) 1450 break; 1451 skb = skb_dequeue(bp->queue); 1452 if (skb == NULL) 1453 break; 1454 bmac_transmit_packet(skb, dev); 1455 } 1456 spin_unlock_irqrestore(&bp->lock, flags); 1457 } 1458 1459 static netdev_tx_t 1460 bmac_output(struct sk_buff *skb, struct net_device *dev) 1461 { 1462 struct bmac_data *bp = netdev_priv(dev); 1463 skb_queue_tail(bp->queue, skb); 1464 bmac_start(dev); 1465 return NETDEV_TX_OK; 1466 } 1467 1468 static void bmac_tx_timeout(struct timer_list *t) 1469 { 1470 struct bmac_data *bp = from_timer(bp, t, tx_timeout); 1471 struct net_device *dev = macio_get_drvdata(bp->mdev); 1472 volatile struct dbdma_regs __iomem *td = bp->tx_dma; 1473 volatile struct dbdma_regs __iomem *rd = bp->rx_dma; 1474 volatile struct dbdma_cmd *cp; 1475 unsigned long flags; 1476 unsigned short config, oldConfig; 1477 int i; 1478 1479 XXDEBUG(("bmac: tx_timeout called\n")); 1480 spin_lock_irqsave(&bp->lock, flags); 1481 bp->timeout_active = 0; 1482 1483 /* update various counters */ 1484 /* bmac_handle_misc_intrs(bp, 0); */ 1485 1486 cp = &bp->tx_cmds[bp->tx_empty]; 1487 /* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */ 1488 /* le32_to_cpu(td->status), le16_to_cpu(cp->xfer_status), bp->tx_bad_runt, */ 1489 /* mb->pr, mb->xmtfs, mb->fifofc)); */ 1490 1491 /* turn off both tx and rx and reset the chip */ 1492 config = bmread(dev, RXCFG); 1493 bmwrite(dev, RXCFG, (config & ~RxMACEnable)); 1494 config = bmread(dev, TXCFG); 1495 bmwrite(dev, TXCFG, (config & ~TxMACEnable)); 1496 out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD)); 1497 printk(KERN_ERR "bmac: transmit timeout - resetting\n"); 1498 bmac_enable_and_reset_chip(dev); 1499 1500 /* restart rx dma */ 1501 cp = bus_to_virt(le32_to_cpu(rd->cmdptr)); 1502 out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD)); 1503 out_le16(&cp->xfer_status, 0); 1504 out_le32(&rd->cmdptr, virt_to_bus(cp)); 1505 out_le32(&rd->control, DBDMA_SET(RUN|WAKE)); 1506 1507 /* fix up the transmit side */ 1508 XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n", 1509 bp->tx_empty, bp->tx_fill, bp->tx_fullup)); 1510 i = bp->tx_empty; 1511 ++dev->stats.tx_errors; 1512 if (i != bp->tx_fill) { 1513 dev_kfree_skb(bp->tx_bufs[i]); 1514 bp->tx_bufs[i] = NULL; 1515 if (++i >= N_TX_RING) i = 0; 1516 bp->tx_empty = i; 1517 } 1518 bp->tx_fullup = 0; 1519 netif_wake_queue(dev); 1520 if (i != bp->tx_fill) { 1521 cp = &bp->tx_cmds[i]; 1522 out_le16(&cp->xfer_status, 0); 1523 out_le16(&cp->command, OUTPUT_LAST); 1524 out_le32(&td->cmdptr, virt_to_bus(cp)); 1525 out_le32(&td->control, DBDMA_SET(RUN)); 1526 /* bmac_set_timeout(dev); */ 1527 XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i)); 1528 } 1529 1530 /* turn it back on */ 1531 oldConfig = bmread(dev, RXCFG); 1532 bmwrite(dev, RXCFG, oldConfig | RxMACEnable ); 1533 oldConfig = bmread(dev, TXCFG); 1534 bmwrite(dev, TXCFG, oldConfig | TxMACEnable ); 1535 1536 spin_unlock_irqrestore(&bp->lock, flags); 1537 } 1538 1539 #if 0 1540 static void dump_dbdma(volatile struct dbdma_cmd *cp,int count) 1541 { 1542 int i,*ip; 1543 1544 for (i=0;i< count;i++) { 1545 ip = (int*)(cp+i); 1546 1547 printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n", 1548 le32_to_cpup(ip+0), 1549 le32_to_cpup(ip+1), 1550 le32_to_cpup(ip+2), 1551 le32_to_cpup(ip+3)); 1552 } 1553 1554 } 1555 #endif 1556 1557 #if 0 1558 static int 1559 bmac_proc_info(char *buffer, char **start, off_t offset, int length) 1560 { 1561 int len = 0; 1562 off_t pos = 0; 1563 off_t begin = 0; 1564 int i; 1565 1566 if (bmac_devs == NULL) 1567 return -ENOSYS; 1568 1569 len += sprintf(buffer, "BMAC counters & registers\n"); 1570 1571 for (i = 0; i<N_REG_ENTRIES; i++) { 1572 len += sprintf(buffer + len, "%s: %#08x\n", 1573 reg_entries[i].name, 1574 bmread(bmac_devs, reg_entries[i].reg_offset)); 1575 pos = begin + len; 1576 1577 if (pos < offset) { 1578 len = 0; 1579 begin = pos; 1580 } 1581 1582 if (pos > offset+length) break; 1583 } 1584 1585 *start = buffer + (offset - begin); 1586 len -= (offset - begin); 1587 1588 if (len > length) len = length; 1589 1590 return len; 1591 } 1592 #endif 1593 1594 static int bmac_remove(struct macio_dev *mdev) 1595 { 1596 struct net_device *dev = macio_get_drvdata(mdev); 1597 struct bmac_data *bp = netdev_priv(dev); 1598 1599 unregister_netdev(dev); 1600 1601 free_irq(dev->irq, dev); 1602 free_irq(bp->tx_dma_intr, dev); 1603 free_irq(bp->rx_dma_intr, dev); 1604 1605 iounmap((void __iomem *)dev->base_addr); 1606 iounmap(bp->tx_dma); 1607 iounmap(bp->rx_dma); 1608 1609 macio_release_resources(mdev); 1610 1611 free_netdev(dev); 1612 1613 return 0; 1614 } 1615 1616 static const struct of_device_id bmac_match[] = 1617 { 1618 { 1619 .name = "bmac", 1620 .data = (void *)0, 1621 }, 1622 { 1623 .type = "network", 1624 .compatible = "bmac+", 1625 .data = (void *)1, 1626 }, 1627 {}, 1628 }; 1629 MODULE_DEVICE_TABLE (of, bmac_match); 1630 1631 static struct macio_driver bmac_driver = 1632 { 1633 .driver = { 1634 .name = "bmac", 1635 .owner = THIS_MODULE, 1636 .of_match_table = bmac_match, 1637 }, 1638 .probe = bmac_probe, 1639 .remove = bmac_remove, 1640 #ifdef CONFIG_PM 1641 .suspend = bmac_suspend, 1642 .resume = bmac_resume, 1643 #endif 1644 }; 1645 1646 1647 static int __init bmac_init(void) 1648 { 1649 if (bmac_emergency_rxbuf == NULL) { 1650 bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL); 1651 if (bmac_emergency_rxbuf == NULL) 1652 return -ENOMEM; 1653 } 1654 1655 return macio_register_driver(&bmac_driver); 1656 } 1657 1658 static void __exit bmac_exit(void) 1659 { 1660 macio_unregister_driver(&bmac_driver); 1661 1662 kfree(bmac_emergency_rxbuf); 1663 bmac_emergency_rxbuf = NULL; 1664 } 1665 1666 MODULE_AUTHOR("Randy Gobbel/Paul Mackerras"); 1667 MODULE_DESCRIPTION("PowerMac BMAC ethernet driver."); 1668 MODULE_LICENSE("GPL"); 1669 1670 module_init(bmac_init); 1671 module_exit(bmac_exit); 1672