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@redhat.com)
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;
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) {
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 printk("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 printk ("ISAPNP reports %s at i/o 0x%x, irq %d\n",
535 (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
536 printk(KERN_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 printk(KERN_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++);
566 static int corkscrew_setup(struct net_device *dev, int ioaddr,
567 struct pnp_dev *idev, int card_number)
569 struct corkscrew_private *vp = netdev_priv(dev);
570 unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
573 DECLARE_MAC_BUF(mac);
577 irq = pnp_irq(idev, 0);
578 vp->dev = &idev->dev;
580 irq = inw(ioaddr + 0x2002) & 15;
583 irq = inw(ioaddr + 0x2002) & 15;
586 dev->base_addr = ioaddr;
588 dev->dma = inw(ioaddr + 0x2000) & 7;
589 vp->product_name = "3c515";
590 vp->options = dev->mem_start;
594 if (card_number >= MAX_UNITS)
597 vp->options = options[card_number];
600 if (vp->options >= 0) {
601 vp->media_override = vp->options & 7;
602 if (vp->media_override == 2)
603 vp->media_override = 0;
604 vp->full_duplex = (vp->options & 8) ? 1 : 0;
605 vp->bus_master = (vp->options & 16) ? 1 : 0;
607 vp->media_override = 7;
612 list_add(&vp->list, &root_corkscrew_dev);
615 printk(KERN_INFO "%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
617 spin_lock_init(&vp->lock);
619 /* Read the station address from the EEPROM. */
621 for (i = 0; i < 0x18; i++) {
622 __be16 *phys_addr = (__be16 *) dev->dev_addr;
624 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
625 /* Pause for at least 162 us. for the read to take place. */
626 for (timer = 4; timer >= 0; timer--) {
628 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
631 eeprom[i] = inw(ioaddr + Wn0EepromData);
632 checksum ^= eeprom[i];
634 phys_addr[i] = htons(eeprom[i]);
636 checksum = (checksum ^ (checksum >> 8)) & 0xff;
637 if (checksum != 0x00)
638 printk(" ***INVALID CHECKSUM %4.4x*** ", checksum);
639 printk(" %s", print_mac(mac, dev->dev_addr));
640 if (eeprom[16] == 0x11c7) { /* Corkscrew */
641 if (request_dma(dev->dma, "3c515")) {
642 printk(", DMA %d allocation failed", dev->dma);
645 printk(", DMA %d", dev->dma);
647 printk(", IRQ %d\n", dev->irq);
648 /* Tell them about an invalid IRQ. */
649 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
650 printk(KERN_WARNING " *** Warning: this IRQ is unlikely to work! ***\n");
653 char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
656 vp->available_media = inw(ioaddr + Wn3_Options);
657 config = inl(ioaddr + Wn3_Config);
658 if (corkscrew_debug > 1)
659 printk(KERN_INFO " Internal config register is %4.4x, transceivers %#x.\n",
660 config, inw(ioaddr + Wn3_Options));
661 printk(KERN_INFO " %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
662 8 << config & Ram_size,
663 config & Ram_width ? "word" : "byte",
664 ram_split[(config & Ram_split) >> Ram_split_shift],
665 config & Autoselect ? "autoselect/" : "",
666 media_tbl[(config & Xcvr) >> Xcvr_shift].name);
667 vp->default_media = (config & Xcvr) >> Xcvr_shift;
668 vp->autoselect = config & Autoselect ? 1 : 0;
669 dev->if_port = vp->default_media;
671 if (vp->media_override != 7) {
672 printk(KERN_INFO " Media override to transceiver type %d (%s).\n",
674 media_tbl[vp->media_override].name);
675 dev->if_port = vp->media_override;
678 vp->capabilities = eeprom[16];
679 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
680 /* Rx is broken at 10mbps, so we always disable it. */
681 /* vp->full_bus_master_rx = 0; */
682 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
684 /* The 3c51x-specific entries in the device structure. */
685 dev->open = &corkscrew_open;
686 dev->hard_start_xmit = &corkscrew_start_xmit;
687 dev->tx_timeout = &corkscrew_timeout;
688 dev->watchdog_timeo = (400 * HZ) / 1000;
689 dev->stop = &corkscrew_close;
690 dev->get_stats = &corkscrew_get_stats;
691 dev->set_multicast_list = &set_rx_mode;
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);
705 /* Before initializing select the active media port. */
708 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
709 config = inl(ioaddr + Wn3_Config);
711 if (vp->media_override != 7) {
712 if (corkscrew_debug > 1)
713 printk(KERN_INFO "%s: Media override to transceiver %d (%s).\n",
714 dev->name, vp->media_override,
715 media_tbl[vp->media_override].name);
716 dev->if_port = vp->media_override;
717 } else if (vp->autoselect) {
718 /* Find first available media type, starting with 100baseTx. */
720 while (!(vp->available_media & media_tbl[dev->if_port].mask))
721 dev->if_port = media_tbl[dev->if_port].next;
723 if (corkscrew_debug > 1)
724 printk("%s: Initial media type %s.\n",
725 dev->name, media_tbl[dev->if_port].name);
727 init_timer(&vp->timer);
728 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
729 vp->timer.data = (unsigned long) dev;
730 vp->timer.function = &corkscrew_timer; /* timer handler */
731 add_timer(&vp->timer);
733 dev->if_port = vp->default_media;
735 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
736 outl(config, ioaddr + Wn3_Config);
738 if (corkscrew_debug > 1) {
739 printk("%s: corkscrew_open() InternalConfig %8.8x.\n",
743 outw(TxReset, ioaddr + EL3_CMD);
744 for (i = 20; i >= 0; i--)
745 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
748 outw(RxReset, ioaddr + EL3_CMD);
749 /* Wait a few ticks for the RxReset command to complete. */
750 for (i = 20; i >= 0; i--)
751 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
754 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
756 /* Use the now-standard shared IRQ implementation. */
757 if (vp->capabilities == 0x11c7) {
758 /* Corkscrew: Cannot share ISA resources. */
761 || request_irq(dev->irq, &corkscrew_interrupt, 0,
762 vp->product_name, dev)) return -EAGAIN;
763 enable_dma(dev->dma);
764 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
765 } else if (request_irq(dev->irq, &corkscrew_interrupt, IRQF_SHARED,
766 vp->product_name, dev)) {
770 if (corkscrew_debug > 1) {
772 printk("%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 printk("%s: Filling in the Rx ring.\n",
811 for (i = 0; i < RX_RING_SIZE; i++) {
813 if (i < (RX_RING_SIZE - 1))
814 vp->rx_ring[i].next =
815 isa_virt_to_bus(&vp->rx_ring[i + 1]);
817 vp->rx_ring[i].next = 0;
818 vp->rx_ring[i].status = 0; /* Clear complete bit. */
819 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
820 skb = dev_alloc_skb(PKT_BUF_SZ);
821 vp->rx_skbuff[i] = skb;
823 break; /* Bad news! */
824 skb->dev = dev; /* Mark as being used by this device. */
825 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
826 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
828 vp->rx_ring[i - 1].next = 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(unsigned long data)
865 struct net_device *dev = (struct net_device *) data;
866 struct corkscrew_private *vp = netdev_priv(dev);
867 int ioaddr = dev->base_addr;
871 if (corkscrew_debug > 1)
872 printk("%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 printk("%s: Media %s has link beat, %x.\n",
891 media_tbl[dev->if_port].name,
893 } else if (corkscrew_debug > 1)
894 printk("%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 printk("%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 printk("%s: Media selection failing, using default %s port.\n",
922 media_tbl[dev->if_port].name);
924 if (corkscrew_debug > 1)
925 printk("%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 printk("%s: Media selection timer finished, %s.\n",
949 dev->name, media_tbl[dev->if_port].name);
951 #endif /* AUTOMEDIA */
955 static void corkscrew_timeout(struct net_device *dev)
958 struct corkscrew_private *vp = netdev_priv(dev);
959 int ioaddr = dev->base_addr;
962 "%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
963 dev->name, inb(ioaddr + TxStatus),
964 inw(ioaddr + EL3_STATUS));
965 /* Slight code bloat to be user friendly. */
966 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
968 "%s: Transmitter encountered 16 collisions -- network"
969 " network cable problem?\n", dev->name);
970 #ifndef final_version
971 printk(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
972 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
974 printk(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
976 for (i = 0; i < TX_RING_SIZE; i++) {
977 printk(" %d: %p length %8.8x status %8.8x\n", i,
979 vp->tx_ring[i].length, vp->tx_ring[i].status);
982 /* Issue TX_RESET and TX_START commands. */
983 outw(TxReset, ioaddr + EL3_CMD);
984 for (i = 20; i >= 0; i--)
985 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
987 outw(TxEnable, ioaddr + EL3_CMD);
988 dev->trans_start = jiffies;
989 dev->stats.tx_errors++;
990 dev->stats.tx_dropped++;
991 netif_wake_queue(dev);
994 static int corkscrew_start_xmit(struct sk_buff *skb,
995 struct net_device *dev)
997 struct corkscrew_private *vp = netdev_priv(dev);
998 int ioaddr = dev->base_addr;
1000 /* Block a timer-based transmit from overlapping. */
1002 netif_stop_queue(dev);
1004 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1005 /* Calculate the next Tx descriptor entry. */
1006 int entry = vp->cur_tx % TX_RING_SIZE;
1007 struct boom_tx_desc *prev_entry;
1008 unsigned long flags;
1011 if (vp->tx_full) /* No room to transmit with */
1013 if (vp->cur_tx != 0)
1014 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1017 if (corkscrew_debug > 3)
1018 printk("%s: Trying to send a packet, Tx index %d.\n",
1019 dev->name, vp->cur_tx);
1020 /* vp->tx_full = 1; */
1021 vp->tx_skbuff[entry] = skb;
1022 vp->tx_ring[entry].next = 0;
1023 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1024 vp->tx_ring[entry].length = skb->len | 0x80000000;
1025 vp->tx_ring[entry].status = skb->len | 0x80000000;
1027 spin_lock_irqsave(&vp->lock, flags);
1028 outw(DownStall, ioaddr + EL3_CMD);
1029 /* Wait for the stall to complete. */
1030 for (i = 20; i >= 0; i--)
1031 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1034 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1035 if (inl(ioaddr + DownListPtr) == 0) {
1036 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1037 ioaddr + DownListPtr);
1040 outw(DownUnstall, ioaddr + EL3_CMD);
1041 spin_unlock_irqrestore(&vp->lock, flags);
1044 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1046 else { /* Clear previous interrupt enable. */
1048 prev_entry->status &= ~0x80000000;
1049 netif_wake_queue(dev);
1051 dev->trans_start = jiffies;
1054 /* Put out the doubleword header... */
1055 outl(skb->len, ioaddr + TX_FIFO);
1056 dev->stats.tx_bytes += skb->len;
1057 #ifdef VORTEX_BUS_MASTER
1058 if (vp->bus_master) {
1059 /* Set the bus-master controller to transfer the packet. */
1060 outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
1061 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1063 outw(StartDMADown, ioaddr + EL3_CMD);
1064 /* queue will be woken at the DMADone interrupt. */
1066 /* ... and the packet rounded to a doubleword. */
1067 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1069 if (inw(ioaddr + TxFree) > 1536) {
1070 netif_wake_queue(dev);
1072 /* Interrupt us when the FIFO has room for max-sized packet. */
1073 outw(SetTxThreshold + (1536 >> 2),
1077 /* ... and the packet rounded to a doubleword. */
1078 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1080 if (inw(ioaddr + TxFree) > 1536) {
1081 netif_wake_queue(dev);
1083 /* Interrupt us when the FIFO has room for max-sized packet. */
1084 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1085 #endif /* bus master */
1087 dev->trans_start = jiffies;
1089 /* Clear the Tx status stack. */
1094 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1095 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1096 if (corkscrew_debug > 2)
1097 printk("%s: Tx error, status %2.2x.\n",
1098 dev->name, tx_status);
1099 if (tx_status & 0x04)
1100 dev->stats.tx_fifo_errors++;
1101 if (tx_status & 0x38)
1102 dev->stats.tx_aborted_errors++;
1103 if (tx_status & 0x30) {
1105 outw(TxReset, ioaddr + EL3_CMD);
1106 for (j = 20; j >= 0; j--)
1107 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1110 outw(TxEnable, ioaddr + EL3_CMD);
1112 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1118 /* The interrupt handler does all of the Rx thread work and cleans up
1119 after the Tx thread. */
1121 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1123 /* Use the now-standard shared IRQ implementation. */
1124 struct net_device *dev = dev_id;
1125 struct corkscrew_private *lp = netdev_priv(dev);
1128 int i = max_interrupt_work;
1130 ioaddr = dev->base_addr;
1131 latency = inb(ioaddr + Timer);
1133 spin_lock(&lp->lock);
1135 status = inw(ioaddr + EL3_STATUS);
1137 if (corkscrew_debug > 4)
1138 printk("%s: interrupt, status %4.4x, timer %d.\n",
1139 dev->name, status, latency);
1140 if ((status & 0xE000) != 0xE000) {
1141 static int donedidthis;
1142 /* Some interrupt controllers store a bogus interrupt from boot-time.
1143 Ignore a single early interrupt, but don't hang the machine for
1144 other interrupt problems. */
1145 if (donedidthis++ > 100) {
1146 printk(KERN_ERR "%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1147 dev->name, status, netif_running(dev));
1148 free_irq(dev->irq, dev);
1154 if (corkscrew_debug > 5)
1155 printk("%s: In interrupt loop, status %4.4x.\n",
1157 if (status & RxComplete)
1160 if (status & TxAvailable) {
1161 if (corkscrew_debug > 5)
1162 printk(" TX room bit was handled.\n");
1163 /* There's room in the FIFO for a full-sized packet. */
1164 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1165 netif_wake_queue(dev);
1167 if (status & DownComplete) {
1168 unsigned int dirty_tx = lp->dirty_tx;
1170 while (lp->cur_tx - dirty_tx > 0) {
1171 int entry = dirty_tx % TX_RING_SIZE;
1172 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1173 break; /* It still hasn't been processed. */
1174 if (lp->tx_skbuff[entry]) {
1175 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1176 lp->tx_skbuff[entry] = NULL;
1180 lp->dirty_tx = dirty_tx;
1181 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1182 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1184 netif_wake_queue(dev);
1187 #ifdef VORTEX_BUS_MASTER
1188 if (status & DMADone) {
1189 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1190 dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1191 netif_wake_queue(dev);
1194 if (status & UpComplete) {
1196 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1198 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1199 /* Handle all uncommon interrupts at once. */
1200 if (status & RxEarly) { /* Rx early is unused. */
1202 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1204 if (status & StatsFull) { /* Empty statistics. */
1205 static int DoneDidThat;
1206 if (corkscrew_debug > 4)
1207 printk("%s: Updating stats.\n", dev->name);
1208 update_stats(ioaddr, dev);
1209 /* DEBUG HACK: Disable statistics as an interrupt source. */
1210 /* This occurs when we have the wrong media type! */
1211 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1213 printk("%s: Updating stats failed, disabling stats as an"
1214 " interrupt source.\n", dev->name);
1215 for (win = 0; win < 8; win++) {
1217 printk("\n Vortex window %d:", win);
1218 for (reg = 0; reg < 16; reg++)
1219 printk(" %2.2x", inb(ioaddr + reg));
1222 outw(SetIntrEnb | TxAvailable |
1223 RxComplete | AdapterFailure |
1224 UpComplete | DownComplete |
1225 TxComplete, ioaddr + EL3_CMD);
1229 if (status & AdapterFailure) {
1230 /* Adapter failure requires Rx reset and reinit. */
1231 outw(RxReset, ioaddr + EL3_CMD);
1232 /* Set the Rx filter to the current state. */
1234 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1235 outw(AckIntr | AdapterFailure,
1241 printk(KERN_ERR "%s: Too much work in interrupt, status %4.4x. "
1242 "Disabling functions (%4.4x).\n", dev->name,
1243 status, SetStatusEnb | ((~status) & 0x7FE));
1244 /* Disable all pending interrupts. */
1245 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1246 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1249 /* Acknowledge the IRQ. */
1250 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1252 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1254 spin_unlock(&lp->lock);
1256 if (corkscrew_debug > 4)
1257 printk("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1261 static int corkscrew_rx(struct net_device *dev)
1263 int ioaddr = dev->base_addr;
1267 if (corkscrew_debug > 5)
1268 printk(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
1269 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1270 while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
1271 if (rx_status & 0x4000) { /* Error, update stats. */
1272 unsigned char rx_error = inb(ioaddr + RxErrors);
1273 if (corkscrew_debug > 2)
1274 printk(" Rx error: status %2.2x.\n",
1276 dev->stats.rx_errors++;
1277 if (rx_error & 0x01)
1278 dev->stats.rx_over_errors++;
1279 if (rx_error & 0x02)
1280 dev->stats.rx_length_errors++;
1281 if (rx_error & 0x04)
1282 dev->stats.rx_frame_errors++;
1283 if (rx_error & 0x08)
1284 dev->stats.rx_crc_errors++;
1285 if (rx_error & 0x10)
1286 dev->stats.rx_length_errors++;
1288 /* The packet length: up to 4.5K!. */
1289 short pkt_len = rx_status & 0x1fff;
1290 struct sk_buff *skb;
1292 skb = dev_alloc_skb(pkt_len + 5 + 2);
1293 if (corkscrew_debug > 4)
1294 printk("Receiving packet size %d status %4.4x.\n",
1295 pkt_len, rx_status);
1297 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1298 /* 'skb_put()' points to the start of sk_buff data area. */
1299 insl(ioaddr + RX_FIFO,
1300 skb_put(skb, pkt_len),
1301 (pkt_len + 3) >> 2);
1302 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
1303 skb->protocol = eth_type_trans(skb, dev);
1305 dev->last_rx = jiffies;
1306 dev->stats.rx_packets++;
1307 dev->stats.rx_bytes += pkt_len;
1308 /* Wait a limited time to go to next packet. */
1309 for (i = 200; i >= 0; i--)
1310 if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
1313 } else if (corkscrew_debug)
1314 printk("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
1316 outw(RxDiscard, ioaddr + EL3_CMD);
1317 dev->stats.rx_dropped++;
1318 /* Wait a limited time to skip this packet. */
1319 for (i = 200; i >= 0; i--)
1320 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1326 static int boomerang_rx(struct net_device *dev)
1328 struct corkscrew_private *vp = netdev_priv(dev);
1329 int entry = vp->cur_rx % RX_RING_SIZE;
1330 int ioaddr = dev->base_addr;
1333 if (corkscrew_debug > 5)
1334 printk(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
1335 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1336 while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
1337 if (rx_status & RxDError) { /* Error, update stats. */
1338 unsigned char rx_error = rx_status >> 16;
1339 if (corkscrew_debug > 2)
1340 printk(" Rx error: status %2.2x.\n",
1342 dev->stats.rx_errors++;
1343 if (rx_error & 0x01)
1344 dev->stats.rx_over_errors++;
1345 if (rx_error & 0x02)
1346 dev->stats.rx_length_errors++;
1347 if (rx_error & 0x04)
1348 dev->stats.rx_frame_errors++;
1349 if (rx_error & 0x08)
1350 dev->stats.rx_crc_errors++;
1351 if (rx_error & 0x10)
1352 dev->stats.rx_length_errors++;
1354 /* The packet length: up to 4.5K!. */
1355 short pkt_len = rx_status & 0x1fff;
1356 struct sk_buff *skb;
1358 dev->stats.rx_bytes += pkt_len;
1359 if (corkscrew_debug > 4)
1360 printk("Receiving packet size %d status %4.4x.\n",
1361 pkt_len, rx_status);
1363 /* Check if the packet is long enough to just accept without
1364 copying to a properly sized skbuff. */
1365 if (pkt_len < rx_copybreak
1366 && (skb = dev_alloc_skb(pkt_len + 4)) != NULL) {
1367 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1368 /* 'skb_put()' points to the start of sk_buff data area. */
1369 memcpy(skb_put(skb, pkt_len),
1370 isa_bus_to_virt(vp->rx_ring[entry].
1375 /* Pass up the skbuff already on the Rx ring. */
1376 skb = vp->rx_skbuff[entry];
1377 vp->rx_skbuff[entry] = NULL;
1378 temp = skb_put(skb, pkt_len);
1379 /* Remove this checking code for final release. */
1380 if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
1381 printk("%s: Warning -- the skbuff addresses do not match"
1382 " in boomerang_rx: %p vs. %p / %p.\n",
1384 isa_bus_to_virt(vp->
1390 skb->protocol = eth_type_trans(skb, dev);
1392 dev->last_rx = jiffies;
1393 dev->stats.rx_packets++;
1395 entry = (++vp->cur_rx) % RX_RING_SIZE;
1397 /* Refill the Rx ring buffers. */
1398 for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
1399 struct sk_buff *skb;
1400 entry = vp->dirty_rx % RX_RING_SIZE;
1401 if (vp->rx_skbuff[entry] == NULL) {
1402 skb = dev_alloc_skb(PKT_BUF_SZ);
1404 break; /* Bad news! */
1405 skb->dev = dev; /* Mark as being used by this device. */
1406 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1407 vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
1408 vp->rx_skbuff[entry] = skb;
1410 vp->rx_ring[entry].status = 0; /* Clear complete bit. */
1415 static int corkscrew_close(struct net_device *dev)
1417 struct corkscrew_private *vp = netdev_priv(dev);
1418 int ioaddr = dev->base_addr;
1421 netif_stop_queue(dev);
1423 if (corkscrew_debug > 1) {
1424 printk("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
1425 dev->name, inw(ioaddr + EL3_STATUS),
1426 inb(ioaddr + TxStatus));
1427 printk("%s: corkscrew close stats: rx_nocopy %d rx_copy %d"
1428 " tx_queued %d.\n", dev->name, rx_nocopy, rx_copy,
1432 del_timer(&vp->timer);
1434 /* Turn off statistics ASAP. We update lp->stats below. */
1435 outw(StatsDisable, ioaddr + EL3_CMD);
1437 /* Disable the receiver and transmitter. */
1438 outw(RxDisable, ioaddr + EL3_CMD);
1439 outw(TxDisable, ioaddr + EL3_CMD);
1441 if (dev->if_port == XCVR_10base2)
1442 /* Turn off thinnet power. Green! */
1443 outw(StopCoax, ioaddr + EL3_CMD);
1445 free_irq(dev->irq, dev);
1447 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1449 update_stats(ioaddr, dev);
1450 if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
1451 outl(0, ioaddr + UpListPtr);
1452 for (i = 0; i < RX_RING_SIZE; i++)
1453 if (vp->rx_skbuff[i]) {
1454 dev_kfree_skb(vp->rx_skbuff[i]);
1455 vp->rx_skbuff[i] = NULL;
1458 if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
1459 outl(0, ioaddr + DownListPtr);
1460 for (i = 0; i < TX_RING_SIZE; i++)
1461 if (vp->tx_skbuff[i]) {
1462 dev_kfree_skb(vp->tx_skbuff[i]);
1463 vp->tx_skbuff[i] = NULL;
1470 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
1472 struct corkscrew_private *vp = netdev_priv(dev);
1473 unsigned long flags;
1475 if (netif_running(dev)) {
1476 spin_lock_irqsave(&vp->lock, flags);
1477 update_stats(dev->base_addr, dev);
1478 spin_unlock_irqrestore(&vp->lock, flags);
1483 /* Update statistics.
1484 Unlike with the EL3 we need not worry about interrupts changing
1485 the window setting from underneath us, but we must still guard
1486 against a race condition with a StatsUpdate interrupt updating the
1487 table. This is done by checking that the ASM (!) code generated uses
1488 atomic updates with '+='.
1490 static void update_stats(int ioaddr, struct net_device *dev)
1492 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1493 /* Switch to the stats window, and read everything. */
1495 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
1496 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1497 /* Multiple collisions. */ inb(ioaddr + 2);
1498 dev->stats.collisions += inb(ioaddr + 3);
1499 dev->stats.tx_window_errors += inb(ioaddr + 4);
1500 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
1501 dev->stats.tx_packets += inb(ioaddr + 6);
1502 dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1503 /* Rx packets */ inb(ioaddr + 7);
1504 /* Must read to clear */
1505 /* Tx deferrals */ inb(ioaddr + 8);
1506 /* Don't bother with register 9, an extension of registers 6&7.
1507 If we do use the 6&7 values the atomic update assumption above
1509 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1511 /* New: On the Vortex we must also clear the BadSSD counter. */
1515 /* We change back to window 7 (not 1) with the Vortex. */
1520 /* This new version of set_rx_mode() supports v1.4 kernels.
1521 The Vortex chip has no documented multicast filter, so the only
1522 multicast setting is to receive all multicast frames. At least
1523 the chip has a very clean way to set the mode, unlike many others. */
1524 static void set_rx_mode(struct net_device *dev)
1526 int ioaddr = dev->base_addr;
1529 if (dev->flags & IFF_PROMISC) {
1530 if (corkscrew_debug > 3)
1531 printk("%s: Setting promiscuous mode.\n",
1533 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1534 } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) {
1535 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1537 new_mode = SetRxFilter | RxStation | RxBroadcast;
1539 outw(new_mode, ioaddr + EL3_CMD);
1542 static void netdev_get_drvinfo(struct net_device *dev,
1543 struct ethtool_drvinfo *info)
1545 strcpy(info->driver, DRV_NAME);
1546 strcpy(info->version, DRV_VERSION);
1547 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1550 static u32 netdev_get_msglevel(struct net_device *dev)
1552 return corkscrew_debug;
1555 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1557 corkscrew_debug = level;
1560 static const struct ethtool_ops netdev_ethtool_ops = {
1561 .get_drvinfo = netdev_get_drvinfo,
1562 .get_msglevel = netdev_get_msglevel,
1563 .set_msglevel = netdev_set_msglevel,
1568 void cleanup_module(void)
1570 while (!list_empty(&root_corkscrew_dev)) {
1571 struct net_device *dev;
1572 struct corkscrew_private *vp;
1574 vp = list_entry(root_corkscrew_dev.next,
1575 struct corkscrew_private, list);
1577 unregister_netdev(dev);
1586 * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c515.c"