2 Written 1997-1998 by Donald Becker.
4 This software may be used and distributed according to the terms
5 of the GNU General Public License, incorporated herein by reference.
7 This driver is for the 3Com ISA EtherLink XL "Corkscrew" 3c515 ethercard.
9 The author may be reached as becker@scyld.com, or C/O
10 Scyld Computing Corporation
11 410 Severn Ave., Suite 210
15 2000/2/2- Added support for kernel-level ISAPnP
16 by Stephen Frost <sfrost@snowman.net> and Alessandro Zummo
17 Cleaned up for 2.3.x/softnet by Jeff Garzik and Alan Cox.
19 2001/11/17 - Added ethtool support (jgarzik)
21 2002/10/28 - Locking updates for 2.5 (alan@lxorguk.ukuu.org.uk)
25 #define DRV_NAME "3c515"
29 /* "Knobs" that adjust features and parameters. */
30 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
31 Setting to > 1512 effectively disables this feature. */
32 static int rx_copybreak = 200;
34 /* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
35 static const int mtu = 1500;
37 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
38 static int max_interrupt_work = 20;
40 /* Enable the automatic media selection code -- usually set. */
43 /* Allow the use of fragment bus master transfers instead of only
44 programmed-I/O for Vortex cards. Full-bus-master transfers are always
45 enabled by default on Boomerang cards. If VORTEX_BUS_MASTER is defined,
46 the feature may be turned on using 'options'. */
47 #define VORTEX_BUS_MASTER
49 /* A few values that may be tweaked. */
50 /* Keep the ring sizes a power of two for efficiency. */
51 #define TX_RING_SIZE 16
52 #define RX_RING_SIZE 16
53 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
55 #include <linux/module.h>
56 #include <linux/isapnp.h>
57 #include <linux/kernel.h>
58 #include <linux/netdevice.h>
59 #include <linux/string.h>
60 #include <linux/errno.h>
62 #include <linux/ioport.h>
63 #include <linux/skbuff.h>
64 #include <linux/etherdevice.h>
65 #include <linux/interrupt.h>
66 #include <linux/timer.h>
67 #include <linux/ethtool.h>
68 #include <linux/bitops.h>
69 #include <linux/uaccess.h>
71 #include <net/Space.h>
77 #include <linux/delay.h>
81 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
82 MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
83 MODULE_LICENSE("GPL");
85 /* "Knobs" for adjusting internal parameters. */
86 /* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */
87 #define DRIVER_DEBUG 1
88 /* Some values here only for performance evaluation and path-coverage
90 static int rx_nocopy, rx_copy, queued_packet;
92 /* Number of times to check to see if the Tx FIFO has space, used in some
94 #define WAIT_TX_AVAIL 200
96 /* Operational parameter that usually are not changed. */
97 #define TX_TIMEOUT ((4*HZ)/10) /* Time in jiffies before concluding Tx hung */
99 /* The size here is somewhat misleading: the Corkscrew also uses the ISA
100 aliased registers at <base>+0x400.
102 #define CORKSCREW_TOTAL_SIZE 0x20
105 static int corkscrew_debug = DRIVER_DEBUG;
107 static int corkscrew_debug = 1;
110 #define CORKSCREW_ID 10
115 I. Board Compatibility
117 This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL,
118 3Com's ISA bus adapter for Fast Ethernet. Due to the unique I/O port layout,
119 it's not practical to integrate this driver with the other EtherLink drivers.
121 II. Board-specific settings
123 The Corkscrew has an EEPROM for configuration, but no special settings are
126 III. Driver operation
128 The 3c515 series use an interface that's very similar to the 3c900 "Boomerang"
129 PCI cards, with the bus master interface extensively modified to work with
132 The card is capable of full-bus-master transfers with separate
133 lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
134 DEC Tulip and Intel Speedo3.
136 This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate
137 receive buffer. This scheme allocates full-sized skbuffs as receive
138 buffers. The value RX_COPYBREAK is used as the copying breakpoint: it is
139 chosen to trade-off the memory wasted by passing the full-sized skbuff to
140 the queue layer for all frames vs. the copying cost of copying a frame to a
141 correctly-sized skbuff.
144 IIIC. Synchronization
145 The driver runs as two independent, single-threaded flows of control. One
146 is the send-packet routine, which enforces single-threaded use by the netif
147 layer. The other thread is the interrupt handler, which is single
148 threaded by the hardware and other software.
152 Thanks to Terry Murphy of 3Com for providing documentation and a development
155 The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com
156 project names. I use these names to eliminate confusion -- 3Com product
157 numbers and names are very similar and often confused.
159 The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes!
160 This driver only supports ethernet frames because of the recent MTU limit
161 of 1.5K, but the changes to support 4.5K are minimal.
164 /* Operational definitions.
165 These are not used by other compilation units and thus are not
166 exported in a ".h" file.
168 First the windows. There are eight register windows, with the command
169 and status registers available in each.
171 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
173 #define EL3_STATUS 0x0e
175 /* The top five bits written to EL3_CMD are a command, the lower
176 11 bits are the parameter, if applicable.
177 Note that 11 parameters bits was fine for ethernet, but the new chips
178 can handle FDDI length frames (~4500 octets) and now parameters count
179 32-bit 'Dwords' rather than octets. */
182 TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11,
183 RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11,
184 UpStall = 6 << 11, UpUnstall = (6 << 11) + 1, DownStall = (6 << 11) + 2,
185 DownUnstall = (6 << 11) + 3, RxDiscard = 8 << 11, TxEnable = 9 << 11,
186 TxDisable = 10 << 11, TxReset = 11 << 11, FakeIntr = 12 << 11,
187 AckIntr = 13 << 11, SetIntrEnb = 14 << 11, SetStatusEnb = 15 << 11,
188 SetRxFilter = 16 << 11, SetRxThreshold = 17 << 11,
189 SetTxThreshold = 18 << 11, SetTxStart = 19 << 11, StartDMAUp = 20 << 11,
190 StartDMADown = (20 << 11) + 1, StatsEnable = 21 << 11,
191 StatsDisable = 22 << 11, StopCoax = 23 << 11,
194 /* The SetRxFilter command accepts the following classes: */
196 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
199 /* Bits in the general status register. */
200 enum corkscrew_status {
201 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
202 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
203 IntReq = 0x0040, StatsFull = 0x0080,
204 DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10,
205 DMAInProgress = 1 << 11, /* DMA controller is still busy. */
206 CmdInProgress = 1 << 12, /* EL3_CMD is still busy. */
209 /* Register window 1 offsets, the window used in normal operation.
210 On the Corkscrew this window is always mapped at offsets 0x10-0x1f. */
212 TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
213 RxStatus = 0x18, Timer = 0x1A, TxStatus = 0x1B,
214 TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
218 #if defined(CORKSCREW)
219 Wn0EepromCmd = 0x200A, /* Corkscrew EEPROM command register. */
220 Wn0EepromData = 0x200C, /* Corkscrew EEPROM results register. */
222 Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */
223 Wn0EepromData = 12, /* Window 0: EEPROM results register. */
226 enum Win0_EEPROM_bits {
227 EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
228 EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
229 EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
232 /* EEPROM locations. */
234 PhysAddr01 = 0, PhysAddr23 = 1, PhysAddr45 = 2, ModelID = 3,
238 enum Window3 { /* Window 3: MAC/config bits. */
239 Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8,
246 Ram_split_shift = 16,
247 Ram_split = 3 << Ram_split_shift,
249 Xcvr = 7 << Xcvr_shift,
250 Autoselect = 0x1000000,
254 Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/media bits. */
256 enum Win4_Media_bits {
257 Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */
258 Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */
259 Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */
260 Media_LnkBeat = 0x0800,
262 enum Window7 { /* Window 7: Bus Master control. */
263 Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
266 /* Boomerang-style bus master control registers. Note ISA aliases! */
268 PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
270 TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
273 /* The Rx and Tx descriptor lists.
274 Caution Alpha hackers: these types are 32 bits! Note also the 8 byte
275 alignment contraint on tx_ring[] and rx_ring[]. */
276 struct boom_rx_desc {
283 /* Values for the Rx status entry. */
284 enum rx_desc_status {
285 RxDComplete = 0x00008000, RxDError = 0x4000,
286 /* See boomerang_rx() for actual error bits */
289 struct boom_tx_desc {
296 struct corkscrew_private {
297 const char *product_name;
298 struct list_head list;
299 struct net_device *our_dev;
300 /* The Rx and Tx rings are here to keep them quad-word-aligned. */
301 struct boom_rx_desc rx_ring[RX_RING_SIZE];
302 struct boom_tx_desc tx_ring[TX_RING_SIZE];
303 /* The addresses of transmit- and receive-in-place skbuffs. */
304 struct sk_buff *rx_skbuff[RX_RING_SIZE];
305 struct sk_buff *tx_skbuff[TX_RING_SIZE];
306 unsigned int cur_rx, cur_tx; /* The next free ring entry */
307 unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
308 struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */
309 struct timer_list timer; /* Media selection timer. */
310 int capabilities ; /* Adapter capabilities word. */
311 int options; /* User-settable misc. driver options. */
312 int last_rx_packets; /* For media autoselection. */
313 unsigned int available_media:8, /* From Wn3_Options */
314 media_override:3, /* Passed-in media type. */
315 default_media:3, /* Read from the EEPROM. */
316 full_duplex:1, autoselect:1, bus_master:1, /* Vortex can only do a fragment bus-m. */
317 full_bus_master_tx:1, full_bus_master_rx:1, /* Boomerang */
323 /* The action to take with a media selection timer tick.
324 Note that we deviate from the 3Com order by checking 10base2 before AUI.
327 XCVR_10baseT = 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
328 XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8,
331 static struct media_table {
333 unsigned int media_bits:16, /* Bits to set in Wn4_Media register. */
334 mask:8, /* The transceiver-present bit in Wn3_Config. */
335 next:8; /* The media type to try next. */
336 short wait; /* Time before we check media status. */
338 { "10baseT", Media_10TP, 0x08, XCVR_10base2, (14 * HZ) / 10 },
339 { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10},
340 { "undefined", 0, 0x80, XCVR_10baseT, 10000},
341 { "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10},
342 { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10},
343 { "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10},
344 { "MII", 0, 0x40, XCVR_10baseT, 3 * HZ},
345 { "undefined", 0, 0x01, XCVR_10baseT, 10000},
346 { "Default", 0, 0xFF, XCVR_10baseT, 10000},
350 static struct isapnp_device_id corkscrew_isapnp_adapters[] = {
351 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
352 ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051),
353 (long) "3Com Fast EtherLink ISA" },
354 { } /* terminate list */
357 MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters);
360 #endif /* __ISAPNP__ */
362 static struct net_device *corkscrew_scan(int unit);
363 static int corkscrew_setup(struct net_device *dev, int ioaddr,
364 struct pnp_dev *idev, int card_number);
365 static int corkscrew_open(struct net_device *dev);
366 static void corkscrew_timer(struct timer_list *t);
367 static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
368 struct net_device *dev);
369 static int corkscrew_rx(struct net_device *dev);
370 static void corkscrew_timeout(struct net_device *dev, unsigned int txqueue);
371 static int boomerang_rx(struct net_device *dev);
372 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id);
373 static int corkscrew_close(struct net_device *dev);
374 static void update_stats(int addr, struct net_device *dev);
375 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev);
376 static void set_rx_mode(struct net_device *dev);
377 static const struct ethtool_ops netdev_ethtool_ops;
381 Unfortunately maximizing the shared code between the integrated and
382 module version of the driver results in a complicated set of initialization
384 init_module() -- modules / tc59x_init() -- built-in
385 The wrappers for corkscrew_scan()
386 corkscrew_scan() The common routine that scans for PCI and EISA cards
387 corkscrew_found_device() Allocate a device structure when we find a card.
388 Different versions exist for modules and built-in.
389 corkscrew_probe1() Fill in the device structure -- this is separated
390 so that the modules code can put it in dev->init.
392 /* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
393 /* Note: this is the only limit on the number of cards supported!! */
394 static int options[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
397 static int debug = -1;
399 module_param(debug, int, 0);
400 module_param_array(options, int, NULL, 0);
401 module_param(rx_copybreak, int, 0);
402 module_param(max_interrupt_work, int, 0);
403 MODULE_PARM_DESC(debug, "3c515 debug level (0-6)");
404 MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering");
405 MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames");
406 MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt");
408 /* A list of all installed Vortex devices, for removing the driver module. */
409 /* we will need locking (and refcounting) if we ever use it for more */
410 static LIST_HEAD(root_corkscrew_dev);
412 static int corkscrew_init_module(void)
416 corkscrew_debug = debug;
417 while (corkscrew_scan(-1))
419 return found ? 0 : -ENODEV;
421 module_init(corkscrew_init_module);
424 struct net_device *tc515_probe(int unit)
426 struct net_device *dev = corkscrew_scan(unit);
429 return ERR_PTR(-ENODEV);
433 #endif /* not MODULE */
435 static int check_device(unsigned ioaddr)
439 if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515"))
441 /* Check the resource configuration for a matching ioaddr. */
442 if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) {
443 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
446 /* Verify by reading the device ID from the EEPROM. */
447 outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
448 /* Pause for at least 162 us. for the read to take place. */
449 for (timer = 4; timer >= 0; timer--) {
451 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
454 if (inw(ioaddr + Wn0EepromData) != 0x6d50) {
455 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
461 static void cleanup_card(struct net_device *dev)
463 struct corkscrew_private *vp = netdev_priv(dev);
464 list_del_init(&vp->list);
467 outw(TotalReset, dev->base_addr + EL3_CMD);
468 release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE);
470 pnp_device_detach(to_pnp_dev(vp->dev));
473 static struct net_device *corkscrew_scan(int unit)
475 struct net_device *dev;
476 static int cards_found = 0;
481 static int pnp_cards;
484 dev = alloc_etherdev(sizeof(struct corkscrew_private));
486 return ERR_PTR(-ENOMEM);
489 sprintf(dev->name, "eth%d", unit);
490 netdev_boot_setup_check(dev);
496 for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
497 struct pnp_dev *idev = NULL;
499 while((idev = pnp_find_dev(NULL,
500 corkscrew_isapnp_adapters[i].vendor,
501 corkscrew_isapnp_adapters[i].function,
504 if (pnp_device_attach(idev) < 0)
506 if (pnp_activate_dev(idev) < 0) {
507 pr_warn("pnp activate failed (out of resources?)\n");
508 pnp_device_detach(idev);
511 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
512 pnp_device_detach(idev);
515 ioaddr = pnp_port_start(idev, 0);
516 irq = pnp_irq(idev, 0);
517 if (!check_device(ioaddr)) {
518 pnp_device_detach(idev);
522 pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n",
523 (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
524 pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
525 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
526 /* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */
527 SET_NETDEV_DEV(dev, &idev->dev);
529 err = corkscrew_setup(dev, ioaddr, idev, cards_found++);
536 #endif /* __ISAPNP__ */
538 /* Check all locations on the ISA bus -- evil! */
539 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
540 if (!check_device(ioaddr))
543 pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
544 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
545 err = corkscrew_setup(dev, ioaddr, NULL, cards_found++);
555 static const struct net_device_ops netdev_ops = {
556 .ndo_open = corkscrew_open,
557 .ndo_stop = corkscrew_close,
558 .ndo_start_xmit = corkscrew_start_xmit,
559 .ndo_tx_timeout = corkscrew_timeout,
560 .ndo_get_stats = corkscrew_get_stats,
561 .ndo_set_rx_mode = set_rx_mode,
562 .ndo_set_mac_address = eth_mac_addr,
563 .ndo_validate_addr = eth_validate_addr,
567 static int corkscrew_setup(struct net_device *dev, int ioaddr,
568 struct pnp_dev *idev, int card_number)
570 struct corkscrew_private *vp = netdev_priv(dev);
571 unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
572 __be16 addr[ETH_ALEN / 2];
578 irq = pnp_irq(idev, 0);
579 vp->dev = &idev->dev;
581 irq = inw(ioaddr + 0x2002) & 15;
584 irq = inw(ioaddr + 0x2002) & 15;
587 dev->base_addr = ioaddr;
589 dev->dma = inw(ioaddr + 0x2000) & 7;
590 vp->product_name = "3c515";
591 vp->options = dev->mem_start;
595 if (card_number >= MAX_UNITS)
598 vp->options = options[card_number];
601 if (vp->options >= 0) {
602 vp->media_override = vp->options & 7;
603 if (vp->media_override == 2)
604 vp->media_override = 0;
605 vp->full_duplex = (vp->options & 8) ? 1 : 0;
606 vp->bus_master = (vp->options & 16) ? 1 : 0;
608 vp->media_override = 7;
613 list_add(&vp->list, &root_corkscrew_dev);
616 pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
618 spin_lock_init(&vp->lock);
620 timer_setup(&vp->timer, corkscrew_timer, 0);
622 /* Read the station address from the EEPROM. */
624 for (i = 0; i < 0x18; i++) {
626 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
627 /* Pause for at least 162 us. for the read to take place. */
628 for (timer = 4; timer >= 0; timer--) {
630 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
633 eeprom[i] = inw(ioaddr + Wn0EepromData);
634 checksum ^= eeprom[i];
636 addr[i] = htons(eeprom[i]);
638 eth_hw_addr_set(dev, (u8 *)addr);
639 checksum = (checksum ^ (checksum >> 8)) & 0xff;
640 if (checksum != 0x00)
641 pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
642 pr_cont(" %pM", dev->dev_addr);
643 if (eeprom[16] == 0x11c7) { /* Corkscrew */
644 if (request_dma(dev->dma, "3c515")) {
645 pr_cont(", DMA %d allocation failed", dev->dma);
648 pr_cont(", DMA %d", dev->dma);
650 pr_cont(", IRQ %d\n", dev->irq);
651 /* Tell them about an invalid IRQ. */
652 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
653 pr_warn(" *** Warning: this IRQ is unlikely to work! ***\n");
656 static const char * const ram_split[] = {
657 "5:3", "3:1", "1:1", "3:5"
661 vp->available_media = inw(ioaddr + Wn3_Options);
662 config = inl(ioaddr + Wn3_Config);
663 if (corkscrew_debug > 1)
664 pr_info(" Internal config register is %4.4x, transceivers %#x.\n",
665 config, inw(ioaddr + Wn3_Options));
666 pr_info(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
667 8 << config & Ram_size,
668 config & Ram_width ? "word" : "byte",
669 ram_split[(config & Ram_split) >> Ram_split_shift],
670 config & Autoselect ? "autoselect/" : "",
671 media_tbl[(config & Xcvr) >> Xcvr_shift].name);
672 vp->default_media = (config & Xcvr) >> Xcvr_shift;
673 vp->autoselect = config & Autoselect ? 1 : 0;
674 dev->if_port = vp->default_media;
676 if (vp->media_override != 7) {
677 pr_info(" Media override to transceiver type %d (%s).\n",
679 media_tbl[vp->media_override].name);
680 dev->if_port = vp->media_override;
683 vp->capabilities = eeprom[16];
684 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
685 /* Rx is broken at 10mbps, so we always disable it. */
686 /* vp->full_bus_master_rx = 0; */
687 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
689 /* The 3c51x-specific entries in the device structure. */
690 dev->netdev_ops = &netdev_ops;
691 dev->watchdog_timeo = (400 * HZ) / 1000;
692 dev->ethtool_ops = &netdev_ethtool_ops;
694 return register_netdev(dev);
698 static int corkscrew_open(struct net_device *dev)
700 int ioaddr = dev->base_addr;
701 struct corkscrew_private *vp = netdev_priv(dev);
702 bool armtimer = false;
706 /* Before initializing select the active media port. */
709 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
710 config = inl(ioaddr + Wn3_Config);
712 if (vp->media_override != 7) {
713 if (corkscrew_debug > 1)
714 pr_info("%s: Media override to transceiver %d (%s).\n",
715 dev->name, vp->media_override,
716 media_tbl[vp->media_override].name);
717 dev->if_port = vp->media_override;
718 } else if (vp->autoselect) {
719 /* Find first available media type, starting with 100baseTx. */
721 while (!(vp->available_media & media_tbl[dev->if_port].mask))
722 dev->if_port = media_tbl[dev->if_port].next;
724 if (corkscrew_debug > 1)
725 pr_debug("%s: Initial media type %s.\n",
726 dev->name, media_tbl[dev->if_port].name);
729 dev->if_port = vp->default_media;
731 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
732 outl(config, ioaddr + Wn3_Config);
734 if (corkscrew_debug > 1) {
735 pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n",
739 outw(TxReset, ioaddr + EL3_CMD);
740 for (i = 20; i >= 0; i--)
741 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
744 outw(RxReset, ioaddr + EL3_CMD);
745 /* Wait a few ticks for the RxReset command to complete. */
746 for (i = 20; i >= 0; i--)
747 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
750 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
752 /* Use the now-standard shared IRQ implementation. */
753 if (vp->capabilities == 0x11c7) {
754 /* Corkscrew: Cannot share ISA resources. */
757 request_irq(dev->irq, corkscrew_interrupt, 0,
758 vp->product_name, dev))
760 enable_dma(dev->dma);
761 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
762 } else if (request_irq(dev->irq, corkscrew_interrupt, IRQF_SHARED,
763 vp->product_name, dev)) {
768 mod_timer(&vp->timer, jiffies + media_tbl[dev->if_port].wait);
770 if (corkscrew_debug > 1) {
772 pr_debug("%s: corkscrew_open() irq %d media status %4.4x.\n",
773 dev->name, dev->irq, inw(ioaddr + Wn4_Media));
776 /* Set the station address and mask in window 2 each time opened. */
778 for (i = 0; i < 6; i++)
779 outb(dev->dev_addr[i], ioaddr + i);
780 for (; i < 12; i += 2)
783 if (dev->if_port == 3)
784 /* Start the thinnet transceiver. We should really wait 50ms... */
785 outw(StartCoax, ioaddr + EL3_CMD);
787 outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
788 media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
790 /* Switch to the stats window, and clear all stats by reading. */
791 outw(StatsDisable, ioaddr + EL3_CMD);
793 for (i = 0; i < 10; i++)
797 /* New: On the Vortex we must also clear the BadSSD counter. */
800 /* ..and on the Boomerang we enable the extra statistics bits. */
801 outw(0x0040, ioaddr + Wn4_NetDiag);
803 /* Switch to register set 7 for normal use. */
806 if (vp->full_bus_master_rx) { /* Boomerang bus master. */
807 vp->cur_rx = vp->dirty_rx = 0;
808 if (corkscrew_debug > 2)
809 pr_debug("%s: Filling in the Rx ring.\n", dev->name);
810 for (i = 0; i < RX_RING_SIZE; i++) {
812 if (i < (RX_RING_SIZE - 1))
813 vp->rx_ring[i].next =
814 isa_virt_to_bus(&vp->rx_ring[i + 1]);
816 vp->rx_ring[i].next = 0;
817 vp->rx_ring[i].status = 0; /* Clear complete bit. */
818 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
819 skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
820 vp->rx_skbuff[i] = skb;
822 break; /* Bad news! */
823 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
824 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
827 vp->rx_ring[i - 1].next =
828 isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
829 outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
831 if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
832 vp->cur_tx = vp->dirty_tx = 0;
833 outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
834 /* Clear the Tx ring. */
835 for (i = 0; i < TX_RING_SIZE; i++)
836 vp->tx_skbuff[i] = NULL;
837 outl(0, ioaddr + DownListPtr);
839 /* Set receiver mode: presumably accept b-case and phys addr only. */
841 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
843 netif_start_queue(dev);
845 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
846 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
847 /* Allow status bits to be seen. */
848 outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
849 (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
850 (vp->full_bus_master_rx ? UpComplete : RxComplete) |
851 (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
852 /* Ack all pending events, and set active indicator mask. */
853 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
855 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
856 | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
862 static void corkscrew_timer(struct timer_list *t)
865 struct corkscrew_private *vp = from_timer(vp, t, timer);
866 struct net_device *dev = vp->our_dev;
867 int ioaddr = dev->base_addr;
871 if (corkscrew_debug > 1)
872 pr_debug("%s: Media selection timer tick happened, %s.\n",
873 dev->name, media_tbl[dev->if_port].name);
875 spin_lock_irqsave(&vp->lock, flags);
878 int old_window = inw(ioaddr + EL3_CMD) >> 13;
881 media_status = inw(ioaddr + Wn4_Media);
882 switch (dev->if_port) {
885 case 5: /* 10baseT, 100baseTX, 100baseFX */
886 if (media_status & Media_LnkBeat) {
888 if (corkscrew_debug > 1)
889 pr_debug("%s: Media %s has link beat, %x.\n",
891 media_tbl[dev->if_port].name,
893 } else if (corkscrew_debug > 1)
894 pr_debug("%s: Media %s is has no link beat, %x.\n",
896 media_tbl[dev->if_port].name,
900 default: /* Other media types handled by Tx timeouts. */
901 if (corkscrew_debug > 1)
902 pr_debug("%s: Media %s is has no indication, %x.\n",
904 media_tbl[dev->if_port].name,
913 media_tbl[dev->if_port].next;
915 while (!(vp->available_media & media_tbl[dev->if_port].mask));
917 if (dev->if_port == 8) { /* Go back to default. */
918 dev->if_port = vp->default_media;
919 if (corkscrew_debug > 1)
920 pr_debug("%s: Media selection failing, using default %s port.\n",
922 media_tbl[dev->if_port].name);
924 if (corkscrew_debug > 1)
925 pr_debug("%s: Media selection failed, now trying %s port.\n",
927 media_tbl[dev->if_port].name);
928 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
929 add_timer(&vp->timer);
931 outw((media_status & ~(Media_10TP | Media_SQE)) |
932 media_tbl[dev->if_port].media_bits,
936 config = inl(ioaddr + Wn3_Config);
937 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
938 outl(config, ioaddr + Wn3_Config);
940 outw(dev->if_port == 3 ? StartCoax : StopCoax,
943 EL3WINDOW(old_window);
946 spin_unlock_irqrestore(&vp->lock, flags);
947 if (corkscrew_debug > 1)
948 pr_debug("%s: Media selection timer finished, %s.\n",
949 dev->name, media_tbl[dev->if_port].name);
951 #endif /* AUTOMEDIA */
954 static void corkscrew_timeout(struct net_device *dev, unsigned int txqueue)
957 struct corkscrew_private *vp = netdev_priv(dev);
958 int ioaddr = dev->base_addr;
960 pr_warn("%s: transmit timed out, tx_status %2.2x status %4.4x\n",
961 dev->name, inb(ioaddr + TxStatus),
962 inw(ioaddr + EL3_STATUS));
963 /* Slight code bloat to be user friendly. */
964 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
965 pr_warn("%s: Transmitter encountered 16 collisions -- network cable problem?\n",
967 #ifndef final_version
968 pr_debug(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
969 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
971 pr_debug(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
973 for (i = 0; i < TX_RING_SIZE; i++) {
974 pr_debug(" %d: %p length %8.8x status %8.8x\n", i,
976 vp->tx_ring[i].length, vp->tx_ring[i].status);
979 /* Issue TX_RESET and TX_START commands. */
980 outw(TxReset, ioaddr + EL3_CMD);
981 for (i = 20; i >= 0; i--)
982 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
984 outw(TxEnable, ioaddr + EL3_CMD);
985 netif_trans_update(dev); /* prevent tx timeout */
986 dev->stats.tx_errors++;
987 dev->stats.tx_dropped++;
988 netif_wake_queue(dev);
991 static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
992 struct net_device *dev)
994 struct corkscrew_private *vp = netdev_priv(dev);
995 int ioaddr = dev->base_addr;
997 /* Block a timer-based transmit from overlapping. */
999 netif_stop_queue(dev);
1001 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1002 /* Calculate the next Tx descriptor entry. */
1003 int entry = vp->cur_tx % TX_RING_SIZE;
1004 struct boom_tx_desc *prev_entry;
1005 unsigned long flags;
1008 if (vp->tx_full) /* No room to transmit with */
1009 return NETDEV_TX_BUSY;
1010 if (vp->cur_tx != 0)
1011 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1014 if (corkscrew_debug > 3)
1015 pr_debug("%s: Trying to send a packet, Tx index %d.\n",
1016 dev->name, vp->cur_tx);
1017 /* vp->tx_full = 1; */
1018 vp->tx_skbuff[entry] = skb;
1019 vp->tx_ring[entry].next = 0;
1020 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1021 vp->tx_ring[entry].length = skb->len | 0x80000000;
1022 vp->tx_ring[entry].status = skb->len | 0x80000000;
1024 spin_lock_irqsave(&vp->lock, flags);
1025 outw(DownStall, ioaddr + EL3_CMD);
1026 /* Wait for the stall to complete. */
1027 for (i = 20; i >= 0; i--)
1028 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1031 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1032 if (inl(ioaddr + DownListPtr) == 0) {
1033 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1034 ioaddr + DownListPtr);
1037 outw(DownUnstall, ioaddr + EL3_CMD);
1038 spin_unlock_irqrestore(&vp->lock, flags);
1041 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1043 else { /* Clear previous interrupt enable. */
1045 prev_entry->status &= ~0x80000000;
1046 netif_wake_queue(dev);
1048 return NETDEV_TX_OK;
1050 /* Put out the doubleword header... */
1051 outl(skb->len, ioaddr + TX_FIFO);
1052 dev->stats.tx_bytes += skb->len;
1053 #ifdef VORTEX_BUS_MASTER
1054 if (vp->bus_master) {
1055 /* Set the bus-master controller to transfer the packet. */
1056 outl(isa_virt_to_bus(skb->data), ioaddr + Wn7_MasterAddr);
1057 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1059 outw(StartDMADown, ioaddr + EL3_CMD);
1060 /* queue will be woken at the DMADone interrupt. */
1062 /* ... and the packet rounded to a doubleword. */
1063 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1065 if (inw(ioaddr + TxFree) > 1536) {
1066 netif_wake_queue(dev);
1068 /* Interrupt us when the FIFO has room for max-sized packet. */
1069 outw(SetTxThreshold + (1536 >> 2),
1073 /* ... and the packet rounded to a doubleword. */
1074 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1076 if (inw(ioaddr + TxFree) > 1536) {
1077 netif_wake_queue(dev);
1079 /* Interrupt us when the FIFO has room for max-sized packet. */
1080 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1081 #endif /* bus master */
1084 /* Clear the Tx status stack. */
1089 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1090 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1091 if (corkscrew_debug > 2)
1092 pr_debug("%s: Tx error, status %2.2x.\n",
1093 dev->name, tx_status);
1094 if (tx_status & 0x04)
1095 dev->stats.tx_fifo_errors++;
1096 if (tx_status & 0x38)
1097 dev->stats.tx_aborted_errors++;
1098 if (tx_status & 0x30) {
1100 outw(TxReset, ioaddr + EL3_CMD);
1101 for (j = 20; j >= 0; j--)
1102 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1105 outw(TxEnable, ioaddr + EL3_CMD);
1107 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1110 return NETDEV_TX_OK;
1113 /* The interrupt handler does all of the Rx thread work and cleans up
1114 after the Tx thread. */
1116 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1118 /* Use the now-standard shared IRQ implementation. */
1119 struct net_device *dev = dev_id;
1120 struct corkscrew_private *lp = netdev_priv(dev);
1123 int i = max_interrupt_work;
1125 ioaddr = dev->base_addr;
1126 latency = inb(ioaddr + Timer);
1128 spin_lock(&lp->lock);
1130 status = inw(ioaddr + EL3_STATUS);
1132 if (corkscrew_debug > 4)
1133 pr_debug("%s: interrupt, status %4.4x, timer %d.\n",
1134 dev->name, status, latency);
1135 if ((status & 0xE000) != 0xE000) {
1136 static int donedidthis;
1137 /* Some interrupt controllers store a bogus interrupt from boot-time.
1138 Ignore a single early interrupt, but don't hang the machine for
1139 other interrupt problems. */
1140 if (donedidthis++ > 100) {
1141 pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1142 dev->name, status, netif_running(dev));
1143 free_irq(dev->irq, dev);
1149 if (corkscrew_debug > 5)
1150 pr_debug("%s: In interrupt loop, status %4.4x.\n",
1152 if (status & RxComplete)
1155 if (status & TxAvailable) {
1156 if (corkscrew_debug > 5)
1157 pr_debug(" TX room bit was handled.\n");
1158 /* There's room in the FIFO for a full-sized packet. */
1159 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1160 netif_wake_queue(dev);
1162 if (status & DownComplete) {
1163 unsigned int dirty_tx = lp->dirty_tx;
1165 while (lp->cur_tx - dirty_tx > 0) {
1166 int entry = dirty_tx % TX_RING_SIZE;
1167 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1168 break; /* It still hasn't been processed. */
1169 if (lp->tx_skbuff[entry]) {
1170 dev_consume_skb_irq(lp->tx_skbuff[entry]);
1171 lp->tx_skbuff[entry] = NULL;
1175 lp->dirty_tx = dirty_tx;
1176 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1177 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1179 netif_wake_queue(dev);
1182 #ifdef VORTEX_BUS_MASTER
1183 if (status & DMADone) {
1184 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1185 dev_consume_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1186 netif_wake_queue(dev);
1189 if (status & UpComplete) {
1191 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1193 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1194 /* Handle all uncommon interrupts at once. */
1195 if (status & RxEarly) { /* Rx early is unused. */
1197 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1199 if (status & StatsFull) { /* Empty statistics. */
1200 static int DoneDidThat;
1201 if (corkscrew_debug > 4)
1202 pr_debug("%s: Updating stats.\n", dev->name);
1203 update_stats(ioaddr, dev);
1204 /* DEBUG HACK: Disable statistics as an interrupt source. */
1205 /* This occurs when we have the wrong media type! */
1206 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1208 pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n",
1210 for (win = 0; win < 8; win++) {
1212 pr_notice("Vortex window %d:", win);
1213 for (reg = 0; reg < 16; reg++)
1214 pr_cont(" %2.2x", inb(ioaddr + reg));
1218 outw(SetIntrEnb | TxAvailable |
1219 RxComplete | AdapterFailure |
1220 UpComplete | DownComplete |
1221 TxComplete, ioaddr + EL3_CMD);
1225 if (status & AdapterFailure) {
1226 /* Adapter failure requires Rx reset and reinit. */
1227 outw(RxReset, ioaddr + EL3_CMD);
1228 /* Set the Rx filter to the current state. */
1230 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1231 outw(AckIntr | AdapterFailure,
1237 pr_err("%s: Too much work in interrupt, status %4.4x. Disabling functions (%4.4x).\n",
1238 dev->name, status, SetStatusEnb | ((~status) & 0x7FE));
1239 /* Disable all pending interrupts. */
1240 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1241 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1244 /* Acknowledge the IRQ. */
1245 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1247 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1249 spin_unlock(&lp->lock);
1251 if (corkscrew_debug > 4)
1252 pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1256 static int corkscrew_rx(struct net_device *dev)
1258 int ioaddr = dev->base_addr;
1262 if (corkscrew_debug > 5)
1263 pr_debug(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
1264 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1265 while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
1266 if (rx_status & 0x4000) { /* Error, update stats. */
1267 unsigned char rx_error = inb(ioaddr + RxErrors);
1268 if (corkscrew_debug > 2)
1269 pr_debug(" Rx error: status %2.2x.\n",
1271 dev->stats.rx_errors++;
1272 if (rx_error & 0x01)
1273 dev->stats.rx_over_errors++;
1274 if (rx_error & 0x02)
1275 dev->stats.rx_length_errors++;
1276 if (rx_error & 0x04)
1277 dev->stats.rx_frame_errors++;
1278 if (rx_error & 0x08)
1279 dev->stats.rx_crc_errors++;
1280 if (rx_error & 0x10)
1281 dev->stats.rx_length_errors++;
1283 /* The packet length: up to 4.5K!. */
1284 short pkt_len = rx_status & 0x1fff;
1285 struct sk_buff *skb;
1287 skb = netdev_alloc_skb(dev, pkt_len + 5 + 2);
1288 if (corkscrew_debug > 4)
1289 pr_debug("Receiving packet size %d status %4.4x.\n",
1290 pkt_len, rx_status);
1292 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1293 /* 'skb_put()' points to the start of sk_buff data area. */
1294 insl(ioaddr + RX_FIFO,
1295 skb_put(skb, pkt_len),
1296 (pkt_len + 3) >> 2);
1297 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
1298 skb->protocol = eth_type_trans(skb, dev);
1300 dev->stats.rx_packets++;
1301 dev->stats.rx_bytes += pkt_len;
1302 /* Wait a limited time to go to next packet. */
1303 for (i = 200; i >= 0; i--)
1304 if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
1307 } else if (corkscrew_debug)
1308 pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
1310 outw(RxDiscard, ioaddr + EL3_CMD);
1311 dev->stats.rx_dropped++;
1312 /* Wait a limited time to skip this packet. */
1313 for (i = 200; i >= 0; i--)
1314 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1320 static int boomerang_rx(struct net_device *dev)
1322 struct corkscrew_private *vp = netdev_priv(dev);
1323 int entry = vp->cur_rx % RX_RING_SIZE;
1324 int ioaddr = dev->base_addr;
1327 if (corkscrew_debug > 5)
1328 pr_debug(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
1329 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1330 while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
1331 if (rx_status & RxDError) { /* Error, update stats. */
1332 unsigned char rx_error = rx_status >> 16;
1333 if (corkscrew_debug > 2)
1334 pr_debug(" Rx error: status %2.2x.\n",
1336 dev->stats.rx_errors++;
1337 if (rx_error & 0x01)
1338 dev->stats.rx_over_errors++;
1339 if (rx_error & 0x02)
1340 dev->stats.rx_length_errors++;
1341 if (rx_error & 0x04)
1342 dev->stats.rx_frame_errors++;
1343 if (rx_error & 0x08)
1344 dev->stats.rx_crc_errors++;
1345 if (rx_error & 0x10)
1346 dev->stats.rx_length_errors++;
1348 /* The packet length: up to 4.5K!. */
1349 short pkt_len = rx_status & 0x1fff;
1350 struct sk_buff *skb;
1352 dev->stats.rx_bytes += pkt_len;
1353 if (corkscrew_debug > 4)
1354 pr_debug("Receiving packet size %d status %4.4x.\n",
1355 pkt_len, rx_status);
1357 /* Check if the packet is long enough to just accept without
1358 copying to a properly sized skbuff. */
1359 if (pkt_len < rx_copybreak &&
1360 (skb = netdev_alloc_skb(dev, pkt_len + 4)) != NULL) {
1361 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1362 /* 'skb_put()' points to the start of sk_buff data area. */
1364 isa_bus_to_virt(vp->rx_ring[entry].addr),
1369 /* Pass up the skbuff already on the Rx ring. */
1370 skb = vp->rx_skbuff[entry];
1371 vp->rx_skbuff[entry] = NULL;
1372 temp = skb_put(skb, pkt_len);
1373 /* Remove this checking code for final release. */
1374 if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
1375 pr_warn("%s: Warning -- the skbuff addresses do not match in boomerang_rx: %p vs. %p / %p\n",
1377 isa_bus_to_virt(vp->rx_ring[entry].addr),
1381 skb->protocol = eth_type_trans(skb, dev);
1383 dev->stats.rx_packets++;
1385 entry = (++vp->cur_rx) % RX_RING_SIZE;
1387 /* Refill the Rx ring buffers. */
1388 for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
1389 struct sk_buff *skb;
1390 entry = vp->dirty_rx % RX_RING_SIZE;
1391 if (vp->rx_skbuff[entry] == NULL) {
1392 skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
1394 break; /* Bad news! */
1395 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1396 vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
1397 vp->rx_skbuff[entry] = skb;
1399 vp->rx_ring[entry].status = 0; /* Clear complete bit. */
1404 static int corkscrew_close(struct net_device *dev)
1406 struct corkscrew_private *vp = netdev_priv(dev);
1407 int ioaddr = dev->base_addr;
1410 netif_stop_queue(dev);
1412 if (corkscrew_debug > 1) {
1413 pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
1414 dev->name, inw(ioaddr + EL3_STATUS),
1415 inb(ioaddr + TxStatus));
1416 pr_debug("%s: corkscrew close stats: rx_nocopy %d rx_copy %d tx_queued %d.\n",
1417 dev->name, rx_nocopy, rx_copy, queued_packet);
1420 del_timer_sync(&vp->timer);
1422 /* Turn off statistics ASAP. We update lp->stats below. */
1423 outw(StatsDisable, ioaddr + EL3_CMD);
1425 /* Disable the receiver and transmitter. */
1426 outw(RxDisable, ioaddr + EL3_CMD);
1427 outw(TxDisable, ioaddr + EL3_CMD);
1429 if (dev->if_port == XCVR_10base2)
1430 /* Turn off thinnet power. Green! */
1431 outw(StopCoax, ioaddr + EL3_CMD);
1433 free_irq(dev->irq, dev);
1435 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1437 update_stats(ioaddr, dev);
1438 if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
1439 outl(0, ioaddr + UpListPtr);
1440 for (i = 0; i < RX_RING_SIZE; i++)
1441 if (vp->rx_skbuff[i]) {
1442 dev_kfree_skb(vp->rx_skbuff[i]);
1443 vp->rx_skbuff[i] = NULL;
1446 if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
1447 outl(0, ioaddr + DownListPtr);
1448 for (i = 0; i < TX_RING_SIZE; i++)
1449 if (vp->tx_skbuff[i]) {
1450 dev_kfree_skb(vp->tx_skbuff[i]);
1451 vp->tx_skbuff[i] = NULL;
1458 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
1460 struct corkscrew_private *vp = netdev_priv(dev);
1461 unsigned long flags;
1463 if (netif_running(dev)) {
1464 spin_lock_irqsave(&vp->lock, flags);
1465 update_stats(dev->base_addr, dev);
1466 spin_unlock_irqrestore(&vp->lock, flags);
1471 /* Update statistics.
1472 Unlike with the EL3 we need not worry about interrupts changing
1473 the window setting from underneath us, but we must still guard
1474 against a race condition with a StatsUpdate interrupt updating the
1475 table. This is done by checking that the ASM (!) code generated uses
1476 atomic updates with '+='.
1478 static void update_stats(int ioaddr, struct net_device *dev)
1480 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1481 /* Switch to the stats window, and read everything. */
1483 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
1484 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1485 /* Multiple collisions. */ inb(ioaddr + 2);
1486 dev->stats.collisions += inb(ioaddr + 3);
1487 dev->stats.tx_window_errors += inb(ioaddr + 4);
1488 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
1489 dev->stats.tx_packets += inb(ioaddr + 6);
1490 dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1491 /* Rx packets */ inb(ioaddr + 7);
1492 /* Must read to clear */
1493 /* Tx deferrals */ inb(ioaddr + 8);
1494 /* Don't bother with register 9, an extension of registers 6&7.
1495 If we do use the 6&7 values the atomic update assumption above
1497 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1499 /* New: On the Vortex we must also clear the BadSSD counter. */
1503 /* We change back to window 7 (not 1) with the Vortex. */
1507 /* This new version of set_rx_mode() supports v1.4 kernels.
1508 The Vortex chip has no documented multicast filter, so the only
1509 multicast setting is to receive all multicast frames. At least
1510 the chip has a very clean way to set the mode, unlike many others. */
1511 static void set_rx_mode(struct net_device *dev)
1513 int ioaddr = dev->base_addr;
1514 unsigned short new_mode;
1516 if (dev->flags & IFF_PROMISC) {
1517 if (corkscrew_debug > 3)
1518 pr_debug("%s: Setting promiscuous mode.\n",
1520 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1521 } else if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) {
1522 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1524 new_mode = SetRxFilter | RxStation | RxBroadcast;
1526 outw(new_mode, ioaddr + EL3_CMD);
1529 static void netdev_get_drvinfo(struct net_device *dev,
1530 struct ethtool_drvinfo *info)
1532 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1533 snprintf(info->bus_info, sizeof(info->bus_info), "ISA 0x%lx",
1537 static u32 netdev_get_msglevel(struct net_device *dev)
1539 return corkscrew_debug;
1542 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1544 corkscrew_debug = level;
1547 static const struct ethtool_ops netdev_ethtool_ops = {
1548 .get_drvinfo = netdev_get_drvinfo,
1549 .get_msglevel = netdev_get_msglevel,
1550 .set_msglevel = netdev_set_msglevel,
1555 void cleanup_module(void)
1557 while (!list_empty(&root_corkscrew_dev)) {
1558 struct net_device *dev;
1559 struct corkscrew_private *vp;
1561 vp = list_entry(root_corkscrew_dev.next,
1562 struct corkscrew_private, list);
1564 unregister_netdev(dev);