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"
26 #define DRV_VERSION "0.99t-ac"
27 #define DRV_RELDATE "28-Oct-2002"
29 static char *version =
30 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and others\n";
34 /* "Knobs" that adjust features and parameters. */
35 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
36 Setting to > 1512 effectively disables this feature. */
37 static int rx_copybreak = 200;
39 /* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
40 static const int mtu = 1500;
42 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
43 static int max_interrupt_work = 20;
45 /* Enable the automatic media selection code -- usually set. */
48 /* Allow the use of fragment bus master transfers instead of only
49 programmed-I/O for Vortex cards. Full-bus-master transfers are always
50 enabled by default on Boomerang cards. If VORTEX_BUS_MASTER is defined,
51 the feature may be turned on using 'options'. */
52 #define VORTEX_BUS_MASTER
54 /* A few values that may be tweaked. */
55 /* Keep the ring sizes a power of two for efficiency. */
56 #define TX_RING_SIZE 16
57 #define RX_RING_SIZE 16
58 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
60 #include <linux/module.h>
61 #include <linux/isapnp.h>
62 #include <linux/kernel.h>
63 #include <linux/netdevice.h>
64 #include <linux/string.h>
65 #include <linux/errno.h>
67 #include <linux/ioport.h>
68 #include <linux/slab.h>
69 #include <linux/skbuff.h>
70 #include <linux/etherdevice.h>
71 #include <linux/interrupt.h>
72 #include <linux/timer.h>
73 #include <linux/ethtool.h>
74 #include <linux/bitops.h>
76 #include <asm/uaccess.h>
81 #include <linux/delay.h>
85 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
86 MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION(DRV_VERSION);
90 /* "Knobs" for adjusting internal parameters. */
91 /* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */
92 #define DRIVER_DEBUG 1
93 /* Some values here only for performance evaluation and path-coverage
95 static int rx_nocopy, rx_copy, queued_packet;
97 /* Number of times to check to see if the Tx FIFO has space, used in some
99 #define WAIT_TX_AVAIL 200
101 /* Operational parameter that usually are not changed. */
102 #define TX_TIMEOUT 40 /* Time in jiffies before concluding Tx hung */
104 /* The size here is somewhat misleading: the Corkscrew also uses the ISA
105 aliased registers at <base>+0x400.
107 #define CORKSCREW_TOTAL_SIZE 0x20
110 static int corkscrew_debug = DRIVER_DEBUG;
112 static int corkscrew_debug = 1;
115 #define CORKSCREW_ID 10
120 I. Board Compatibility
122 This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL,
123 3Com's ISA bus adapter for Fast Ethernet. Due to the unique I/O port layout,
124 it's not practical to integrate this driver with the other EtherLink drivers.
126 II. Board-specific settings
128 The Corkscrew has an EEPROM for configuration, but no special settings are
131 III. Driver operation
133 The 3c515 series use an interface that's very similar to the 3c900 "Boomerang"
134 PCI cards, with the bus master interface extensively modified to work with
137 The card is capable of full-bus-master transfers with separate
138 lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
139 DEC Tulip and Intel Speedo3.
141 This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate
142 receive buffer. This scheme allocates full-sized skbuffs as receive
143 buffers. The value RX_COPYBREAK is used as the copying breakpoint: it is
144 chosen to trade-off the memory wasted by passing the full-sized skbuff to
145 the queue layer for all frames vs. the copying cost of copying a frame to a
146 correctly-sized skbuff.
149 IIIC. Synchronization
150 The driver runs as two independent, single-threaded flows of control. One
151 is the send-packet routine, which enforces single-threaded use by the netif
152 layer. The other thread is the interrupt handler, which is single
153 threaded by the hardware and other software.
157 Thanks to Terry Murphy of 3Com for providing documentation and a development
160 The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com
161 project names. I use these names to eliminate confusion -- 3Com product
162 numbers and names are very similar and often confused.
164 The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes!
165 This driver only supports ethernet frames because of the recent MTU limit
166 of 1.5K, but the changes to support 4.5K are minimal.
169 /* Operational definitions.
170 These are not used by other compilation units and thus are not
171 exported in a ".h" file.
173 First the windows. There are eight register windows, with the command
174 and status registers available in each.
176 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
178 #define EL3_STATUS 0x0e
180 /* The top five bits written to EL3_CMD are a command, the lower
181 11 bits are the parameter, if applicable.
182 Note that 11 parameters bits was fine for ethernet, but the new chips
183 can handle FDDI length frames (~4500 octets) and now parameters count
184 32-bit 'Dwords' rather than octets. */
187 TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11,
188 RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11,
189 UpStall = 6 << 11, UpUnstall = (6 << 11) + 1, DownStall = (6 << 11) + 2,
190 DownUnstall = (6 << 11) + 3, RxDiscard = 8 << 11, TxEnable = 9 << 11,
191 TxDisable = 10 << 11, TxReset = 11 << 11, FakeIntr = 12 << 11,
192 AckIntr = 13 << 11, SetIntrEnb = 14 << 11, SetStatusEnb = 15 << 11,
193 SetRxFilter = 16 << 11, SetRxThreshold = 17 << 11,
194 SetTxThreshold = 18 << 11, SetTxStart = 19 << 11, StartDMAUp = 20 << 11,
195 StartDMADown = (20 << 11) + 1, StatsEnable = 21 << 11,
196 StatsDisable = 22 << 11, StopCoax = 23 << 11,
199 /* The SetRxFilter command accepts the following classes: */
201 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
204 /* Bits in the general status register. */
205 enum corkscrew_status {
206 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
207 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
208 IntReq = 0x0040, StatsFull = 0x0080,
209 DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10,
210 DMAInProgress = 1 << 11, /* DMA controller is still busy. */
211 CmdInProgress = 1 << 12, /* EL3_CMD is still busy. */
214 /* Register window 1 offsets, the window used in normal operation.
215 On the Corkscrew this window is always mapped at offsets 0x10-0x1f. */
217 TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
218 RxStatus = 0x18, Timer = 0x1A, TxStatus = 0x1B,
219 TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
223 #if defined(CORKSCREW)
224 Wn0EepromCmd = 0x200A, /* Corkscrew EEPROM command register. */
225 Wn0EepromData = 0x200C, /* Corkscrew EEPROM results register. */
227 Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */
228 Wn0EepromData = 12, /* Window 0: EEPROM results register. */
231 enum Win0_EEPROM_bits {
232 EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
233 EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
234 EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
237 /* EEPROM locations. */
239 PhysAddr01 = 0, PhysAddr23 = 1, PhysAddr45 = 2, ModelID = 3,
243 enum Window3 { /* Window 3: MAC/config bits. */
244 Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8,
251 Ram_split_shift = 16,
252 Ram_split = 3 << Ram_split_shift,
254 Xcvr = 7 << Xcvr_shift,
255 Autoselect = 0x1000000,
259 Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/media bits. */
261 enum Win4_Media_bits {
262 Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */
263 Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */
264 Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */
265 Media_LnkBeat = 0x0800,
267 enum Window7 { /* Window 7: Bus Master control. */
268 Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
271 /* Boomerang-style bus master control registers. Note ISA aliases! */
273 PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
275 TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
278 /* The Rx and Tx descriptor lists.
279 Caution Alpha hackers: these types are 32 bits! Note also the 8 byte
280 alignment contraint on tx_ring[] and rx_ring[]. */
281 struct boom_rx_desc {
288 /* Values for the Rx status entry. */
289 enum rx_desc_status {
290 RxDComplete = 0x00008000, RxDError = 0x4000,
291 /* See boomerang_rx() for actual error bits */
294 struct boom_tx_desc {
301 struct corkscrew_private {
302 const char *product_name;
303 struct list_head list;
304 struct net_device *our_dev;
305 /* The Rx and Tx rings are here to keep them quad-word-aligned. */
306 struct boom_rx_desc rx_ring[RX_RING_SIZE];
307 struct boom_tx_desc tx_ring[TX_RING_SIZE];
308 /* The addresses of transmit- and receive-in-place skbuffs. */
309 struct sk_buff *rx_skbuff[RX_RING_SIZE];
310 struct sk_buff *tx_skbuff[TX_RING_SIZE];
311 unsigned int cur_rx, cur_tx; /* The next free ring entry */
312 unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
313 struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */
314 struct timer_list timer; /* Media selection timer. */
315 int capabilities ; /* Adapter capabilities word. */
316 int options; /* User-settable misc. driver options. */
317 int last_rx_packets; /* For media autoselection. */
318 unsigned int available_media:8, /* From Wn3_Options */
319 media_override:3, /* Passed-in media type. */
320 default_media:3, /* Read from the EEPROM. */
321 full_duplex:1, autoselect:1, bus_master:1, /* Vortex can only do a fragment bus-m. */
322 full_bus_master_tx:1, full_bus_master_rx:1, /* Boomerang */
328 /* The action to take with a media selection timer tick.
329 Note that we deviate from the 3Com order by checking 10base2 before AUI.
332 XCVR_10baseT = 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
333 XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8,
336 static struct media_table {
338 unsigned int media_bits:16, /* Bits to set in Wn4_Media register. */
339 mask:8, /* The transceiver-present bit in Wn3_Config. */
340 next:8; /* The media type to try next. */
341 short wait; /* Time before we check media status. */
343 { "10baseT", Media_10TP, 0x08, XCVR_10base2, (14 * HZ) / 10 },
344 { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10},
345 { "undefined", 0, 0x80, XCVR_10baseT, 10000},
346 { "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10},
347 { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10},
348 { "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10},
349 { "MII", 0, 0x40, XCVR_10baseT, 3 * HZ},
350 { "undefined", 0, 0x01, XCVR_10baseT, 10000},
351 { "Default", 0, 0xFF, XCVR_10baseT, 10000},
355 static struct isapnp_device_id corkscrew_isapnp_adapters[] = {
356 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
357 ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051),
358 (long) "3Com Fast EtherLink ISA" },
359 { } /* terminate list */
362 MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters);
365 #endif /* __ISAPNP__ */
367 static struct net_device *corkscrew_scan(int unit);
368 static int corkscrew_setup(struct net_device *dev, int ioaddr,
369 struct pnp_dev *idev, int card_number);
370 static int corkscrew_open(struct net_device *dev);
371 static void corkscrew_timer(unsigned long arg);
372 static int corkscrew_start_xmit(struct sk_buff *skb,
373 struct net_device *dev);
374 static int corkscrew_rx(struct net_device *dev);
375 static void corkscrew_timeout(struct net_device *dev);
376 static int boomerang_rx(struct net_device *dev);
377 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id);
378 static int corkscrew_close(struct net_device *dev);
379 static void update_stats(int addr, struct net_device *dev);
380 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev);
381 static void set_rx_mode(struct net_device *dev);
382 static const struct ethtool_ops netdev_ethtool_ops;
386 Unfortunately maximizing the shared code between the integrated and
387 module version of the driver results in a complicated set of initialization
389 init_module() -- modules / tc59x_init() -- built-in
390 The wrappers for corkscrew_scan()
391 corkscrew_scan() The common routine that scans for PCI and EISA cards
392 corkscrew_found_device() Allocate a device structure when we find a card.
393 Different versions exist for modules and built-in.
394 corkscrew_probe1() Fill in the device structure -- this is separated
395 so that the modules code can put it in dev->init.
397 /* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
398 /* Note: this is the only limit on the number of cards supported!! */
399 static int options[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
402 static int debug = -1;
404 module_param(debug, int, 0);
405 module_param_array(options, int, NULL, 0);
406 module_param(rx_copybreak, int, 0);
407 module_param(max_interrupt_work, int, 0);
408 MODULE_PARM_DESC(debug, "3c515 debug level (0-6)");
409 MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering");
410 MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames");
411 MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt");
413 /* A list of all installed Vortex devices, for removing the driver module. */
414 /* we will need locking (and refcounting) if we ever use it for more */
415 static LIST_HEAD(root_corkscrew_dev);
417 int init_module(void)
421 corkscrew_debug = debug;
423 pr_debug("%s", version);
424 while (corkscrew_scan(-1))
426 return found ? 0 : -ENODEV;
430 struct net_device *tc515_probe(int unit)
432 struct net_device *dev = corkscrew_scan(unit);
436 return ERR_PTR(-ENODEV);
438 if (corkscrew_debug > 0 && !printed) {
440 pr_debug("%s", version);
445 #endif /* not MODULE */
447 static int check_device(unsigned ioaddr)
451 if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515"))
453 /* Check the resource configuration for a matching ioaddr. */
454 if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) {
455 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
458 /* Verify by reading the device ID from the EEPROM. */
459 outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
460 /* Pause for at least 162 us. for the read to take place. */
461 for (timer = 4; timer >= 0; timer--) {
463 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
466 if (inw(ioaddr + Wn0EepromData) != 0x6d50) {
467 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
473 static void cleanup_card(struct net_device *dev)
475 struct corkscrew_private *vp = netdev_priv(dev);
476 list_del_init(&vp->list);
479 outw(TotalReset, dev->base_addr + EL3_CMD);
480 release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE);
482 pnp_device_detach(to_pnp_dev(vp->dev));
485 static struct net_device *corkscrew_scan(int unit)
487 struct net_device *dev;
488 static int cards_found = 0;
493 static int pnp_cards;
496 dev = alloc_etherdev(sizeof(struct corkscrew_private));
498 return ERR_PTR(-ENOMEM);
501 sprintf(dev->name, "eth%d", unit);
502 netdev_boot_setup_check(dev);
508 for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
509 struct pnp_dev *idev = NULL;
511 while((idev = pnp_find_dev(NULL,
512 corkscrew_isapnp_adapters[i].vendor,
513 corkscrew_isapnp_adapters[i].function,
516 if (pnp_device_attach(idev) < 0)
518 if (pnp_activate_dev(idev) < 0) {
519 pr_warning("pnp activate failed (out of resources?)\n");
520 pnp_device_detach(idev);
523 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
524 pnp_device_detach(idev);
527 ioaddr = pnp_port_start(idev, 0);
528 irq = pnp_irq(idev, 0);
529 if (!check_device(ioaddr)) {
530 pnp_device_detach(idev);
534 pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n",
535 (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
536 pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
537 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
538 /* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */
539 SET_NETDEV_DEV(dev, &idev->dev);
541 err = corkscrew_setup(dev, ioaddr, idev, cards_found++);
548 #endif /* __ISAPNP__ */
550 /* Check all locations on the ISA bus -- evil! */
551 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
552 if (!check_device(ioaddr))
555 pr_info("3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
556 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
557 err = corkscrew_setup(dev, ioaddr, NULL, cards_found++);
567 static const struct net_device_ops netdev_ops = {
568 .ndo_open = corkscrew_open,
569 .ndo_stop = corkscrew_close,
570 .ndo_start_xmit = corkscrew_start_xmit,
571 .ndo_tx_timeout = corkscrew_timeout,
572 .ndo_get_stats = corkscrew_get_stats,
573 .ndo_set_multicast_list = set_rx_mode,
574 .ndo_change_mtu = eth_change_mtu,
575 .ndo_set_mac_address = eth_mac_addr,
576 .ndo_validate_addr = eth_validate_addr,
580 static int corkscrew_setup(struct net_device *dev, int ioaddr,
581 struct pnp_dev *idev, int card_number)
583 struct corkscrew_private *vp = netdev_priv(dev);
584 unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
590 irq = pnp_irq(idev, 0);
591 vp->dev = &idev->dev;
593 irq = inw(ioaddr + 0x2002) & 15;
596 irq = inw(ioaddr + 0x2002) & 15;
599 dev->base_addr = ioaddr;
601 dev->dma = inw(ioaddr + 0x2000) & 7;
602 vp->product_name = "3c515";
603 vp->options = dev->mem_start;
607 if (card_number >= MAX_UNITS)
610 vp->options = options[card_number];
613 if (vp->options >= 0) {
614 vp->media_override = vp->options & 7;
615 if (vp->media_override == 2)
616 vp->media_override = 0;
617 vp->full_duplex = (vp->options & 8) ? 1 : 0;
618 vp->bus_master = (vp->options & 16) ? 1 : 0;
620 vp->media_override = 7;
625 list_add(&vp->list, &root_corkscrew_dev);
628 pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
630 spin_lock_init(&vp->lock);
632 /* Read the station address from the EEPROM. */
634 for (i = 0; i < 0x18; i++) {
635 __be16 *phys_addr = (__be16 *) dev->dev_addr;
637 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
638 /* Pause for at least 162 us. for the read to take place. */
639 for (timer = 4; timer >= 0; timer--) {
641 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
644 eeprom[i] = inw(ioaddr + Wn0EepromData);
645 checksum ^= eeprom[i];
647 phys_addr[i] = htons(eeprom[i]);
649 checksum = (checksum ^ (checksum >> 8)) & 0xff;
650 if (checksum != 0x00)
651 pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
652 pr_cont(" %pM", dev->dev_addr);
653 if (eeprom[16] == 0x11c7) { /* Corkscrew */
654 if (request_dma(dev->dma, "3c515")) {
655 pr_cont(", DMA %d allocation failed", dev->dma);
658 pr_cont(", DMA %d", dev->dma);
660 pr_cont(", IRQ %d\n", dev->irq);
661 /* Tell them about an invalid IRQ. */
662 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
663 pr_warning(" *** Warning: this IRQ is unlikely to work! ***\n");
666 char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
669 vp->available_media = inw(ioaddr + Wn3_Options);
670 config = inl(ioaddr + Wn3_Config);
671 if (corkscrew_debug > 1)
672 pr_info(" Internal config register is %4.4x, transceivers %#x.\n",
673 config, inw(ioaddr + Wn3_Options));
674 pr_info(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
675 8 << config & Ram_size,
676 config & Ram_width ? "word" : "byte",
677 ram_split[(config & Ram_split) >> Ram_split_shift],
678 config & Autoselect ? "autoselect/" : "",
679 media_tbl[(config & Xcvr) >> Xcvr_shift].name);
680 vp->default_media = (config & Xcvr) >> Xcvr_shift;
681 vp->autoselect = config & Autoselect ? 1 : 0;
682 dev->if_port = vp->default_media;
684 if (vp->media_override != 7) {
685 pr_info(" Media override to transceiver type %d (%s).\n",
687 media_tbl[vp->media_override].name);
688 dev->if_port = vp->media_override;
691 vp->capabilities = eeprom[16];
692 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
693 /* Rx is broken at 10mbps, so we always disable it. */
694 /* vp->full_bus_master_rx = 0; */
695 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
697 /* The 3c51x-specific entries in the device structure. */
698 dev->netdev_ops = &netdev_ops;
699 dev->watchdog_timeo = (400 * HZ) / 1000;
700 dev->ethtool_ops = &netdev_ethtool_ops;
702 return register_netdev(dev);
706 static int corkscrew_open(struct net_device *dev)
708 int ioaddr = dev->base_addr;
709 struct corkscrew_private *vp = netdev_priv(dev);
713 /* Before initializing select the active media port. */
716 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
717 config = inl(ioaddr + Wn3_Config);
719 if (vp->media_override != 7) {
720 if (corkscrew_debug > 1)
721 pr_info("%s: Media override to transceiver %d (%s).\n",
722 dev->name, vp->media_override,
723 media_tbl[vp->media_override].name);
724 dev->if_port = vp->media_override;
725 } else if (vp->autoselect) {
726 /* Find first available media type, starting with 100baseTx. */
728 while (!(vp->available_media & media_tbl[dev->if_port].mask))
729 dev->if_port = media_tbl[dev->if_port].next;
731 if (corkscrew_debug > 1)
732 pr_debug("%s: Initial media type %s.\n",
733 dev->name, media_tbl[dev->if_port].name);
735 init_timer(&vp->timer);
736 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
737 vp->timer.data = (unsigned long) dev;
738 vp->timer.function = &corkscrew_timer; /* timer handler */
739 add_timer(&vp->timer);
741 dev->if_port = vp->default_media;
743 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
744 outl(config, ioaddr + Wn3_Config);
746 if (corkscrew_debug > 1) {
747 pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n",
751 outw(TxReset, ioaddr + EL3_CMD);
752 for (i = 20; i >= 0; i--)
753 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
756 outw(RxReset, ioaddr + EL3_CMD);
757 /* Wait a few ticks for the RxReset command to complete. */
758 for (i = 20; i >= 0; i--)
759 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
762 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
764 /* Use the now-standard shared IRQ implementation. */
765 if (vp->capabilities == 0x11c7) {
766 /* Corkscrew: Cannot share ISA resources. */
769 || request_irq(dev->irq, &corkscrew_interrupt, 0,
770 vp->product_name, dev)) return -EAGAIN;
771 enable_dma(dev->dma);
772 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
773 } else if (request_irq(dev->irq, &corkscrew_interrupt, IRQF_SHARED,
774 vp->product_name, dev)) {
778 if (corkscrew_debug > 1) {
780 pr_debug("%s: corkscrew_open() irq %d media status %4.4x.\n",
781 dev->name, dev->irq, inw(ioaddr + Wn4_Media));
784 /* Set the station address and mask in window 2 each time opened. */
786 for (i = 0; i < 6; i++)
787 outb(dev->dev_addr[i], ioaddr + i);
788 for (; i < 12; i += 2)
791 if (dev->if_port == 3)
792 /* Start the thinnet transceiver. We should really wait 50ms... */
793 outw(StartCoax, ioaddr + EL3_CMD);
795 outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
796 media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
798 /* Switch to the stats window, and clear all stats by reading. */
799 outw(StatsDisable, ioaddr + EL3_CMD);
801 for (i = 0; i < 10; i++)
805 /* New: On the Vortex we must also clear the BadSSD counter. */
808 /* ..and on the Boomerang we enable the extra statistics bits. */
809 outw(0x0040, ioaddr + Wn4_NetDiag);
811 /* Switch to register set 7 for normal use. */
814 if (vp->full_bus_master_rx) { /* Boomerang bus master. */
815 vp->cur_rx = vp->dirty_rx = 0;
816 if (corkscrew_debug > 2)
817 pr_debug("%s: Filling in the Rx ring.\n", dev->name);
818 for (i = 0; i < RX_RING_SIZE; i++) {
820 if (i < (RX_RING_SIZE - 1))
821 vp->rx_ring[i].next =
822 isa_virt_to_bus(&vp->rx_ring[i + 1]);
824 vp->rx_ring[i].next = 0;
825 vp->rx_ring[i].status = 0; /* Clear complete bit. */
826 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
827 skb = dev_alloc_skb(PKT_BUF_SZ);
828 vp->rx_skbuff[i] = skb;
830 break; /* Bad news! */
831 skb->dev = dev; /* Mark as being used by this device. */
832 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
833 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
835 vp->rx_ring[i - 1].next = isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
836 outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
838 if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
839 vp->cur_tx = vp->dirty_tx = 0;
840 outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
841 /* Clear the Tx ring. */
842 for (i = 0; i < TX_RING_SIZE; i++)
843 vp->tx_skbuff[i] = NULL;
844 outl(0, ioaddr + DownListPtr);
846 /* Set receiver mode: presumably accept b-case and phys addr only. */
848 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
850 netif_start_queue(dev);
852 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
853 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
854 /* Allow status bits to be seen. */
855 outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
856 (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
857 (vp->full_bus_master_rx ? UpComplete : RxComplete) |
858 (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
859 /* Ack all pending events, and set active indicator mask. */
860 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
862 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
863 | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
869 static void corkscrew_timer(unsigned long data)
872 struct net_device *dev = (struct net_device *) data;
873 struct corkscrew_private *vp = netdev_priv(dev);
874 int ioaddr = dev->base_addr;
878 if (corkscrew_debug > 1)
879 pr_debug("%s: Media selection timer tick happened, %s.\n",
880 dev->name, media_tbl[dev->if_port].name);
882 spin_lock_irqsave(&vp->lock, flags);
885 int old_window = inw(ioaddr + EL3_CMD) >> 13;
888 media_status = inw(ioaddr + Wn4_Media);
889 switch (dev->if_port) {
892 case 5: /* 10baseT, 100baseTX, 100baseFX */
893 if (media_status & Media_LnkBeat) {
895 if (corkscrew_debug > 1)
896 pr_debug("%s: Media %s has link beat, %x.\n",
898 media_tbl[dev->if_port].name,
900 } else if (corkscrew_debug > 1)
901 pr_debug("%s: Media %s is has no link beat, %x.\n",
903 media_tbl[dev->if_port].name,
907 default: /* Other media types handled by Tx timeouts. */
908 if (corkscrew_debug > 1)
909 pr_debug("%s: Media %s is has no indication, %x.\n",
911 media_tbl[dev->if_port].name,
920 media_tbl[dev->if_port].next;
922 while (!(vp->available_media & media_tbl[dev->if_port].mask));
924 if (dev->if_port == 8) { /* Go back to default. */
925 dev->if_port = vp->default_media;
926 if (corkscrew_debug > 1)
927 pr_debug("%s: Media selection failing, using default %s port.\n",
929 media_tbl[dev->if_port].name);
931 if (corkscrew_debug > 1)
932 pr_debug("%s: Media selection failed, now trying %s port.\n",
934 media_tbl[dev->if_port].name);
935 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
936 add_timer(&vp->timer);
938 outw((media_status & ~(Media_10TP | Media_SQE)) |
939 media_tbl[dev->if_port].media_bits,
943 config = inl(ioaddr + Wn3_Config);
944 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
945 outl(config, ioaddr + Wn3_Config);
947 outw(dev->if_port == 3 ? StartCoax : StopCoax,
950 EL3WINDOW(old_window);
953 spin_unlock_irqrestore(&vp->lock, flags);
954 if (corkscrew_debug > 1)
955 pr_debug("%s: Media selection timer finished, %s.\n",
956 dev->name, media_tbl[dev->if_port].name);
958 #endif /* AUTOMEDIA */
962 static void corkscrew_timeout(struct net_device *dev)
965 struct corkscrew_private *vp = netdev_priv(dev);
966 int ioaddr = dev->base_addr;
968 pr_warning("%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
969 dev->name, inb(ioaddr + TxStatus),
970 inw(ioaddr + EL3_STATUS));
971 /* Slight code bloat to be user friendly. */
972 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
973 pr_warning("%s: Transmitter encountered 16 collisions --"
974 " network cable problem?\n", dev->name);
975 #ifndef final_version
976 pr_debug(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
977 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
979 pr_debug(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
981 for (i = 0; i < TX_RING_SIZE; i++) {
982 pr_debug(" %d: %p length %8.8x status %8.8x\n", i,
984 vp->tx_ring[i].length, vp->tx_ring[i].status);
987 /* Issue TX_RESET and TX_START commands. */
988 outw(TxReset, ioaddr + EL3_CMD);
989 for (i = 20; i >= 0; i--)
990 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
992 outw(TxEnable, ioaddr + EL3_CMD);
993 dev->trans_start = jiffies;
994 dev->stats.tx_errors++;
995 dev->stats.tx_dropped++;
996 netif_wake_queue(dev);
999 static int corkscrew_start_xmit(struct sk_buff *skb,
1000 struct net_device *dev)
1002 struct corkscrew_private *vp = netdev_priv(dev);
1003 int ioaddr = dev->base_addr;
1005 /* Block a timer-based transmit from overlapping. */
1007 netif_stop_queue(dev);
1009 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1010 /* Calculate the next Tx descriptor entry. */
1011 int entry = vp->cur_tx % TX_RING_SIZE;
1012 struct boom_tx_desc *prev_entry;
1013 unsigned long flags;
1016 if (vp->tx_full) /* No room to transmit with */
1017 return NETDEV_TX_BUSY;
1018 if (vp->cur_tx != 0)
1019 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1022 if (corkscrew_debug > 3)
1023 pr_debug("%s: Trying to send a packet, Tx index %d.\n",
1024 dev->name, vp->cur_tx);
1025 /* vp->tx_full = 1; */
1026 vp->tx_skbuff[entry] = skb;
1027 vp->tx_ring[entry].next = 0;
1028 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1029 vp->tx_ring[entry].length = skb->len | 0x80000000;
1030 vp->tx_ring[entry].status = skb->len | 0x80000000;
1032 spin_lock_irqsave(&vp->lock, flags);
1033 outw(DownStall, ioaddr + EL3_CMD);
1034 /* Wait for the stall to complete. */
1035 for (i = 20; i >= 0; i--)
1036 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1039 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1040 if (inl(ioaddr + DownListPtr) == 0) {
1041 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1042 ioaddr + DownListPtr);
1045 outw(DownUnstall, ioaddr + EL3_CMD);
1046 spin_unlock_irqrestore(&vp->lock, flags);
1049 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1051 else { /* Clear previous interrupt enable. */
1053 prev_entry->status &= ~0x80000000;
1054 netif_wake_queue(dev);
1056 dev->trans_start = jiffies;
1059 /* Put out the doubleword header... */
1060 outl(skb->len, ioaddr + TX_FIFO);
1061 dev->stats.tx_bytes += skb->len;
1062 #ifdef VORTEX_BUS_MASTER
1063 if (vp->bus_master) {
1064 /* Set the bus-master controller to transfer the packet. */
1065 outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
1066 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1068 outw(StartDMADown, ioaddr + EL3_CMD);
1069 /* queue will be woken at the DMADone interrupt. */
1071 /* ... and the packet rounded to a doubleword. */
1072 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1074 if (inw(ioaddr + TxFree) > 1536) {
1075 netif_wake_queue(dev);
1077 /* Interrupt us when the FIFO has room for max-sized packet. */
1078 outw(SetTxThreshold + (1536 >> 2),
1082 /* ... and the packet rounded to a doubleword. */
1083 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1085 if (inw(ioaddr + TxFree) > 1536) {
1086 netif_wake_queue(dev);
1088 /* Interrupt us when the FIFO has room for max-sized packet. */
1089 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1090 #endif /* bus master */
1092 dev->trans_start = jiffies;
1094 /* Clear the Tx status stack. */
1099 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1100 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1101 if (corkscrew_debug > 2)
1102 pr_debug("%s: Tx error, status %2.2x.\n",
1103 dev->name, tx_status);
1104 if (tx_status & 0x04)
1105 dev->stats.tx_fifo_errors++;
1106 if (tx_status & 0x38)
1107 dev->stats.tx_aborted_errors++;
1108 if (tx_status & 0x30) {
1110 outw(TxReset, ioaddr + EL3_CMD);
1111 for (j = 20; j >= 0; j--)
1112 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1115 outw(TxEnable, ioaddr + EL3_CMD);
1117 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1123 /* The interrupt handler does all of the Rx thread work and cleans up
1124 after the Tx thread. */
1126 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1128 /* Use the now-standard shared IRQ implementation. */
1129 struct net_device *dev = dev_id;
1130 struct corkscrew_private *lp = netdev_priv(dev);
1133 int i = max_interrupt_work;
1135 ioaddr = dev->base_addr;
1136 latency = inb(ioaddr + Timer);
1138 spin_lock(&lp->lock);
1140 status = inw(ioaddr + EL3_STATUS);
1142 if (corkscrew_debug > 4)
1143 pr_debug("%s: interrupt, status %4.4x, timer %d.\n",
1144 dev->name, status, latency);
1145 if ((status & 0xE000) != 0xE000) {
1146 static int donedidthis;
1147 /* Some interrupt controllers store a bogus interrupt from boot-time.
1148 Ignore a single early interrupt, but don't hang the machine for
1149 other interrupt problems. */
1150 if (donedidthis++ > 100) {
1151 pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1152 dev->name, status, netif_running(dev));
1153 free_irq(dev->irq, dev);
1159 if (corkscrew_debug > 5)
1160 pr_debug("%s: In interrupt loop, status %4.4x.\n",
1162 if (status & RxComplete)
1165 if (status & TxAvailable) {
1166 if (corkscrew_debug > 5)
1167 pr_debug(" TX room bit was handled.\n");
1168 /* There's room in the FIFO for a full-sized packet. */
1169 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1170 netif_wake_queue(dev);
1172 if (status & DownComplete) {
1173 unsigned int dirty_tx = lp->dirty_tx;
1175 while (lp->cur_tx - dirty_tx > 0) {
1176 int entry = dirty_tx % TX_RING_SIZE;
1177 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1178 break; /* It still hasn't been processed. */
1179 if (lp->tx_skbuff[entry]) {
1180 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1181 lp->tx_skbuff[entry] = NULL;
1185 lp->dirty_tx = dirty_tx;
1186 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1187 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1189 netif_wake_queue(dev);
1192 #ifdef VORTEX_BUS_MASTER
1193 if (status & DMADone) {
1194 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1195 dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1196 netif_wake_queue(dev);
1199 if (status & UpComplete) {
1201 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1203 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1204 /* Handle all uncommon interrupts at once. */
1205 if (status & RxEarly) { /* Rx early is unused. */
1207 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1209 if (status & StatsFull) { /* Empty statistics. */
1210 static int DoneDidThat;
1211 if (corkscrew_debug > 4)
1212 pr_debug("%s: Updating stats.\n", dev->name);
1213 update_stats(ioaddr, dev);
1214 /* DEBUG HACK: Disable statistics as an interrupt source. */
1215 /* This occurs when we have the wrong media type! */
1216 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1218 pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n",
1220 for (win = 0; win < 8; win++) {
1222 pr_notice("Vortex window %d:", win);
1223 for (reg = 0; reg < 16; reg++)
1224 pr_cont(" %2.2x", inb(ioaddr + reg));
1228 outw(SetIntrEnb | TxAvailable |
1229 RxComplete | AdapterFailure |
1230 UpComplete | DownComplete |
1231 TxComplete, ioaddr + EL3_CMD);
1235 if (status & AdapterFailure) {
1236 /* Adapter failure requires Rx reset and reinit. */
1237 outw(RxReset, ioaddr + EL3_CMD);
1238 /* Set the Rx filter to the current state. */
1240 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1241 outw(AckIntr | AdapterFailure,
1247 pr_err("%s: Too much work in interrupt, status %4.4x. Disabling functions (%4.4x).\n",
1248 dev->name, status, SetStatusEnb | ((~status) & 0x7FE));
1249 /* Disable all pending interrupts. */
1250 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1251 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1254 /* Acknowledge the IRQ. */
1255 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1257 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1259 spin_unlock(&lp->lock);
1261 if (corkscrew_debug > 4)
1262 pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1266 static int corkscrew_rx(struct net_device *dev)
1268 int ioaddr = dev->base_addr;
1272 if (corkscrew_debug > 5)
1273 pr_debug(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
1274 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1275 while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
1276 if (rx_status & 0x4000) { /* Error, update stats. */
1277 unsigned char rx_error = inb(ioaddr + RxErrors);
1278 if (corkscrew_debug > 2)
1279 pr_debug(" Rx error: status %2.2x.\n",
1281 dev->stats.rx_errors++;
1282 if (rx_error & 0x01)
1283 dev->stats.rx_over_errors++;
1284 if (rx_error & 0x02)
1285 dev->stats.rx_length_errors++;
1286 if (rx_error & 0x04)
1287 dev->stats.rx_frame_errors++;
1288 if (rx_error & 0x08)
1289 dev->stats.rx_crc_errors++;
1290 if (rx_error & 0x10)
1291 dev->stats.rx_length_errors++;
1293 /* The packet length: up to 4.5K!. */
1294 short pkt_len = rx_status & 0x1fff;
1295 struct sk_buff *skb;
1297 skb = dev_alloc_skb(pkt_len + 5 + 2);
1298 if (corkscrew_debug > 4)
1299 pr_debug("Receiving packet size %d status %4.4x.\n",
1300 pkt_len, rx_status);
1302 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1303 /* 'skb_put()' points to the start of sk_buff data area. */
1304 insl(ioaddr + RX_FIFO,
1305 skb_put(skb, pkt_len),
1306 (pkt_len + 3) >> 2);
1307 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
1308 skb->protocol = eth_type_trans(skb, dev);
1310 dev->stats.rx_packets++;
1311 dev->stats.rx_bytes += pkt_len;
1312 /* Wait a limited time to go to next packet. */
1313 for (i = 200; i >= 0; i--)
1314 if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
1317 } else if (corkscrew_debug)
1318 pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
1320 outw(RxDiscard, ioaddr + EL3_CMD);
1321 dev->stats.rx_dropped++;
1322 /* Wait a limited time to skip this packet. */
1323 for (i = 200; i >= 0; i--)
1324 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1330 static int boomerang_rx(struct net_device *dev)
1332 struct corkscrew_private *vp = netdev_priv(dev);
1333 int entry = vp->cur_rx % RX_RING_SIZE;
1334 int ioaddr = dev->base_addr;
1337 if (corkscrew_debug > 5)
1338 pr_debug(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
1339 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1340 while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
1341 if (rx_status & RxDError) { /* Error, update stats. */
1342 unsigned char rx_error = rx_status >> 16;
1343 if (corkscrew_debug > 2)
1344 pr_debug(" Rx error: status %2.2x.\n",
1346 dev->stats.rx_errors++;
1347 if (rx_error & 0x01)
1348 dev->stats.rx_over_errors++;
1349 if (rx_error & 0x02)
1350 dev->stats.rx_length_errors++;
1351 if (rx_error & 0x04)
1352 dev->stats.rx_frame_errors++;
1353 if (rx_error & 0x08)
1354 dev->stats.rx_crc_errors++;
1355 if (rx_error & 0x10)
1356 dev->stats.rx_length_errors++;
1358 /* The packet length: up to 4.5K!. */
1359 short pkt_len = rx_status & 0x1fff;
1360 struct sk_buff *skb;
1362 dev->stats.rx_bytes += pkt_len;
1363 if (corkscrew_debug > 4)
1364 pr_debug("Receiving packet size %d status %4.4x.\n",
1365 pkt_len, rx_status);
1367 /* Check if the packet is long enough to just accept without
1368 copying to a properly sized skbuff. */
1369 if (pkt_len < rx_copybreak
1370 && (skb = dev_alloc_skb(pkt_len + 4)) != NULL) {
1371 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1372 /* 'skb_put()' points to the start of sk_buff data area. */
1373 memcpy(skb_put(skb, pkt_len),
1374 isa_bus_to_virt(vp->rx_ring[entry].
1379 /* Pass up the skbuff already on the Rx ring. */
1380 skb = vp->rx_skbuff[entry];
1381 vp->rx_skbuff[entry] = NULL;
1382 temp = skb_put(skb, pkt_len);
1383 /* Remove this checking code for final release. */
1384 if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
1385 pr_warning("%s: Warning -- the skbuff addresses do not match"
1386 " in boomerang_rx: %p vs. %p / %p.\n",
1388 isa_bus_to_virt(vp->
1394 skb->protocol = eth_type_trans(skb, dev);
1396 dev->stats.rx_packets++;
1398 entry = (++vp->cur_rx) % RX_RING_SIZE;
1400 /* Refill the Rx ring buffers. */
1401 for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
1402 struct sk_buff *skb;
1403 entry = vp->dirty_rx % RX_RING_SIZE;
1404 if (vp->rx_skbuff[entry] == NULL) {
1405 skb = dev_alloc_skb(PKT_BUF_SZ);
1407 break; /* Bad news! */
1408 skb->dev = dev; /* Mark as being used by this device. */
1409 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1410 vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
1411 vp->rx_skbuff[entry] = skb;
1413 vp->rx_ring[entry].status = 0; /* Clear complete bit. */
1418 static int corkscrew_close(struct net_device *dev)
1420 struct corkscrew_private *vp = netdev_priv(dev);
1421 int ioaddr = dev->base_addr;
1424 netif_stop_queue(dev);
1426 if (corkscrew_debug > 1) {
1427 pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
1428 dev->name, inw(ioaddr + EL3_STATUS),
1429 inb(ioaddr + TxStatus));
1430 pr_debug("%s: corkscrew close stats: rx_nocopy %d rx_copy %d tx_queued %d.\n",
1431 dev->name, rx_nocopy, rx_copy, queued_packet);
1434 del_timer(&vp->timer);
1436 /* Turn off statistics ASAP. We update lp->stats below. */
1437 outw(StatsDisable, ioaddr + EL3_CMD);
1439 /* Disable the receiver and transmitter. */
1440 outw(RxDisable, ioaddr + EL3_CMD);
1441 outw(TxDisable, ioaddr + EL3_CMD);
1443 if (dev->if_port == XCVR_10base2)
1444 /* Turn off thinnet power. Green! */
1445 outw(StopCoax, ioaddr + EL3_CMD);
1447 free_irq(dev->irq, dev);
1449 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1451 update_stats(ioaddr, dev);
1452 if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
1453 outl(0, ioaddr + UpListPtr);
1454 for (i = 0; i < RX_RING_SIZE; i++)
1455 if (vp->rx_skbuff[i]) {
1456 dev_kfree_skb(vp->rx_skbuff[i]);
1457 vp->rx_skbuff[i] = NULL;
1460 if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
1461 outl(0, ioaddr + DownListPtr);
1462 for (i = 0; i < TX_RING_SIZE; i++)
1463 if (vp->tx_skbuff[i]) {
1464 dev_kfree_skb(vp->tx_skbuff[i]);
1465 vp->tx_skbuff[i] = NULL;
1472 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
1474 struct corkscrew_private *vp = netdev_priv(dev);
1475 unsigned long flags;
1477 if (netif_running(dev)) {
1478 spin_lock_irqsave(&vp->lock, flags);
1479 update_stats(dev->base_addr, dev);
1480 spin_unlock_irqrestore(&vp->lock, flags);
1485 /* Update statistics.
1486 Unlike with the EL3 we need not worry about interrupts changing
1487 the window setting from underneath us, but we must still guard
1488 against a race condition with a StatsUpdate interrupt updating the
1489 table. This is done by checking that the ASM (!) code generated uses
1490 atomic updates with '+='.
1492 static void update_stats(int ioaddr, struct net_device *dev)
1494 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1495 /* Switch to the stats window, and read everything. */
1497 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
1498 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1499 /* Multiple collisions. */ inb(ioaddr + 2);
1500 dev->stats.collisions += inb(ioaddr + 3);
1501 dev->stats.tx_window_errors += inb(ioaddr + 4);
1502 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
1503 dev->stats.tx_packets += inb(ioaddr + 6);
1504 dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1505 /* Rx packets */ inb(ioaddr + 7);
1506 /* Must read to clear */
1507 /* Tx deferrals */ inb(ioaddr + 8);
1508 /* Don't bother with register 9, an extension of registers 6&7.
1509 If we do use the 6&7 values the atomic update assumption above
1511 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1513 /* New: On the Vortex we must also clear the BadSSD counter. */
1517 /* We change back to window 7 (not 1) with the Vortex. */
1522 /* This new version of set_rx_mode() supports v1.4 kernels.
1523 The Vortex chip has no documented multicast filter, so the only
1524 multicast setting is to receive all multicast frames. At least
1525 the chip has a very clean way to set the mode, unlike many others. */
1526 static void set_rx_mode(struct net_device *dev)
1528 int ioaddr = dev->base_addr;
1531 if (dev->flags & IFF_PROMISC) {
1532 if (corkscrew_debug > 3)
1533 pr_debug("%s: Setting promiscuous mode.\n",
1535 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1536 } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) {
1537 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1539 new_mode = SetRxFilter | RxStation | RxBroadcast;
1541 outw(new_mode, ioaddr + EL3_CMD);
1544 static void netdev_get_drvinfo(struct net_device *dev,
1545 struct ethtool_drvinfo *info)
1547 strcpy(info->driver, DRV_NAME);
1548 strcpy(info->version, DRV_VERSION);
1549 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1552 static u32 netdev_get_msglevel(struct net_device *dev)
1554 return corkscrew_debug;
1557 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1559 corkscrew_debug = level;
1562 static const struct ethtool_ops netdev_ethtool_ops = {
1563 .get_drvinfo = netdev_get_drvinfo,
1564 .get_msglevel = netdev_get_msglevel,
1565 .set_msglevel = netdev_set_msglevel,
1570 void cleanup_module(void)
1572 while (!list_empty(&root_corkscrew_dev)) {
1573 struct net_device *dev;
1574 struct corkscrew_private *vp;
1576 vp = list_entry(root_corkscrew_dev.next,
1577 struct corkscrew_private, list);
1579 unregister_netdev(dev);