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,
248 struct w3_config_fields {
249 unsigned int ram_size:3, ram_width:1, ram_speed:2, rom_size:2;
251 unsigned int ram_split:2, pad18:2, xcvr:3, pad21:1, autoselect:1;
257 Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/media bits. */
259 enum Win4_Media_bits {
260 Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */
261 Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */
262 Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */
263 Media_LnkBeat = 0x0800,
265 enum Window7 { /* Window 7: Bus Master control. */
266 Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
269 /* Boomerang-style bus master control registers. Note ISA aliases! */
271 PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
273 TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
276 /* The Rx and Tx descriptor lists.
277 Caution Alpha hackers: these types are 32 bits! Note also the 8 byte
278 alignment contraint on tx_ring[] and rx_ring[]. */
279 struct boom_rx_desc {
286 /* Values for the Rx status entry. */
287 enum rx_desc_status {
288 RxDComplete = 0x00008000, RxDError = 0x4000,
289 /* See boomerang_rx() for actual error bits */
292 struct boom_tx_desc {
299 struct corkscrew_private {
300 const char *product_name;
301 struct list_head list;
302 struct net_device *our_dev;
303 /* The Rx and Tx rings are here to keep them quad-word-aligned. */
304 struct boom_rx_desc rx_ring[RX_RING_SIZE];
305 struct boom_tx_desc tx_ring[TX_RING_SIZE];
306 /* The addresses of transmit- and receive-in-place skbuffs. */
307 struct sk_buff *rx_skbuff[RX_RING_SIZE];
308 struct sk_buff *tx_skbuff[TX_RING_SIZE];
309 unsigned int cur_rx, cur_tx; /* The next free ring entry */
310 unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
311 struct net_device_stats stats;
312 struct sk_buff *tx_skb; /* Packet being eaten by bus master ctrl. */
313 struct timer_list timer; /* Media selection timer. */
314 int capabilities ; /* Adapter capabilities word. */
315 int options; /* User-settable misc. driver options. */
316 int last_rx_packets; /* For media autoselection. */
317 unsigned int available_media:8, /* From Wn3_Options */
318 media_override:3, /* Passed-in media type. */
319 default_media:3, /* Read from the EEPROM. */
320 full_duplex:1, autoselect:1, bus_master:1, /* Vortex can only do a fragment bus-m. */
321 full_bus_master_tx:1, full_bus_master_rx:1, /* Boomerang */
327 /* The action to take with a media selection timer tick.
328 Note that we deviate from the 3Com order by checking 10base2 before AUI.
331 XCVR_10baseT = 0, XCVR_AUI, XCVR_10baseTOnly, XCVR_10base2, XCVR_100baseTx,
332 XCVR_100baseFx, XCVR_MII = 6, XCVR_Default = 8,
335 static struct media_table {
337 unsigned int media_bits:16, /* Bits to set in Wn4_Media register. */
338 mask:8, /* The transceiver-present bit in Wn3_Config. */
339 next:8; /* The media type to try next. */
340 short wait; /* Time before we check media status. */
342 { "10baseT", Media_10TP, 0x08, XCVR_10base2, (14 * HZ) / 10 },
343 { "10Mbs AUI", Media_SQE, 0x20, XCVR_Default, (1 * HZ) / 10},
344 { "undefined", 0, 0x80, XCVR_10baseT, 10000},
345 { "10base2", 0, 0x10, XCVR_AUI, (1 * HZ) / 10},
346 { "100baseTX", Media_Lnk, 0x02, XCVR_100baseFx, (14 * HZ) / 10},
347 { "100baseFX", Media_Lnk, 0x04, XCVR_MII, (14 * HZ) / 10},
348 { "MII", 0, 0x40, XCVR_10baseT, 3 * HZ},
349 { "undefined", 0, 0x01, XCVR_10baseT, 10000},
350 { "Default", 0, 0xFF, XCVR_10baseT, 10000},
354 static struct isapnp_device_id corkscrew_isapnp_adapters[] = {
355 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
356 ISAPNP_VENDOR('T', 'C', 'M'), ISAPNP_FUNCTION(0x5051),
357 (long) "3Com Fast EtherLink ISA" },
358 { } /* terminate list */
361 MODULE_DEVICE_TABLE(isapnp, corkscrew_isapnp_adapters);
364 #endif /* __ISAPNP__ */
366 static struct net_device *corkscrew_scan(int unit);
367 static int corkscrew_setup(struct net_device *dev, int ioaddr,
368 struct pnp_dev *idev, int card_number);
369 static int corkscrew_open(struct net_device *dev);
370 static void corkscrew_timer(unsigned long arg);
371 static int corkscrew_start_xmit(struct sk_buff *skb,
372 struct net_device *dev);
373 static int corkscrew_rx(struct net_device *dev);
374 static void corkscrew_timeout(struct net_device *dev);
375 static int boomerang_rx(struct net_device *dev);
376 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id);
377 static int corkscrew_close(struct net_device *dev);
378 static void update_stats(int addr, struct net_device *dev);
379 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev);
380 static void set_rx_mode(struct net_device *dev);
381 static const struct ethtool_ops netdev_ethtool_ops;
385 Unfortunately maximizing the shared code between the integrated and
386 module version of the driver results in a complicated set of initialization
388 init_module() -- modules / tc59x_init() -- built-in
389 The wrappers for corkscrew_scan()
390 corkscrew_scan() The common routine that scans for PCI and EISA cards
391 corkscrew_found_device() Allocate a device structure when we find a card.
392 Different versions exist for modules and built-in.
393 corkscrew_probe1() Fill in the device structure -- this is separated
394 so that the modules code can put it in dev->init.
396 /* This driver uses 'options' to pass the media type, full-duplex flag, etc. */
397 /* Note: this is the only limit on the number of cards supported!! */
398 static int options[MAX_UNITS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
401 static int debug = -1;
403 module_param(debug, int, 0);
404 module_param_array(options, int, NULL, 0);
405 module_param(rx_copybreak, int, 0);
406 module_param(max_interrupt_work, int, 0);
407 MODULE_PARM_DESC(debug, "3c515 debug level (0-6)");
408 MODULE_PARM_DESC(options, "3c515: Bits 0-2: media type, bit 3: full duplex, bit 4: bus mastering");
409 MODULE_PARM_DESC(rx_copybreak, "3c515 copy breakpoint for copy-only-tiny-frames");
410 MODULE_PARM_DESC(max_interrupt_work, "3c515 maximum events handled per interrupt");
412 /* A list of all installed Vortex devices, for removing the driver module. */
413 /* we will need locking (and refcounting) if we ever use it for more */
414 static LIST_HEAD(root_corkscrew_dev);
416 int init_module(void)
420 corkscrew_debug = debug;
423 while (corkscrew_scan(-1))
425 return found ? 0 : -ENODEV;
429 struct net_device *tc515_probe(int unit)
431 struct net_device *dev = corkscrew_scan(unit);
435 return ERR_PTR(-ENODEV);
437 if (corkscrew_debug > 0 && !printed) {
444 #endif /* not MODULE */
446 static int check_device(unsigned ioaddr)
450 if (!request_region(ioaddr, CORKSCREW_TOTAL_SIZE, "3c515"))
452 /* Check the resource configuration for a matching ioaddr. */
453 if ((inw(ioaddr + 0x2002) & 0x1f0) != (ioaddr & 0x1f0)) {
454 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
457 /* Verify by reading the device ID from the EEPROM. */
458 outw(EEPROM_Read + 7, ioaddr + Wn0EepromCmd);
459 /* Pause for at least 162 us. for the read to take place. */
460 for (timer = 4; timer >= 0; timer--) {
462 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
465 if (inw(ioaddr + Wn0EepromData) != 0x6d50) {
466 release_region(ioaddr, CORKSCREW_TOTAL_SIZE);
472 static void cleanup_card(struct net_device *dev)
474 struct corkscrew_private *vp = netdev_priv(dev);
475 list_del_init(&vp->list);
478 outw(TotalReset, dev->base_addr + EL3_CMD);
479 release_region(dev->base_addr, CORKSCREW_TOTAL_SIZE);
481 pnp_device_detach(to_pnp_dev(vp->dev));
484 static struct net_device *corkscrew_scan(int unit)
486 struct net_device *dev;
487 static int cards_found = 0;
492 static int pnp_cards;
495 dev = alloc_etherdev(sizeof(struct corkscrew_private));
497 return ERR_PTR(-ENOMEM);
500 sprintf(dev->name, "eth%d", unit);
501 netdev_boot_setup_check(dev);
507 for(i=0; corkscrew_isapnp_adapters[i].vendor != 0; i++) {
508 struct pnp_dev *idev = NULL;
510 while((idev = pnp_find_dev(NULL,
511 corkscrew_isapnp_adapters[i].vendor,
512 corkscrew_isapnp_adapters[i].function,
515 if (pnp_device_attach(idev) < 0)
517 if (pnp_activate_dev(idev) < 0) {
518 printk("pnp activate failed (out of resources?)\n");
519 pnp_device_detach(idev);
522 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
523 pnp_device_detach(idev);
526 ioaddr = pnp_port_start(idev, 0);
527 irq = pnp_irq(idev, 0);
528 if (!check_device(ioaddr)) {
529 pnp_device_detach(idev);
533 printk ("ISAPNP reports %s at i/o 0x%x, irq %d\n",
534 (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
535 printk(KERN_INFO "3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
536 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
537 /* irq = inw(ioaddr + 0x2002) & 15; */ /* Use the irq from isapnp */
538 SET_NETDEV_DEV(dev, &idev->dev);
540 err = corkscrew_setup(dev, ioaddr, idev, cards_found++);
547 #endif /* __ISAPNP__ */
549 /* Check all locations on the ISA bus -- evil! */
550 for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x20) {
551 if (!check_device(ioaddr))
554 printk(KERN_INFO "3c515 Resource configuration register %#4.4x, DCR %4.4x.\n",
555 inl(ioaddr + 0x2002), inw(ioaddr + 0x2000));
556 err = corkscrew_setup(dev, ioaddr, NULL, cards_found++);
565 static int corkscrew_setup(struct net_device *dev, int ioaddr,
566 struct pnp_dev *idev, int card_number)
568 struct corkscrew_private *vp = netdev_priv(dev);
569 unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
572 DECLARE_MAC_BUF(mac);
575 irq = pnp_irq(idev, 0);
576 vp->dev = &idev->dev;
578 irq = inw(ioaddr + 0x2002) & 15;
581 dev->base_addr = ioaddr;
583 dev->dma = inw(ioaddr + 0x2000) & 7;
584 vp->product_name = "3c515";
585 vp->options = dev->mem_start;
589 if (card_number >= MAX_UNITS)
592 vp->options = options[card_number];
595 if (vp->options >= 0) {
596 vp->media_override = vp->options & 7;
597 if (vp->media_override == 2)
598 vp->media_override = 0;
599 vp->full_duplex = (vp->options & 8) ? 1 : 0;
600 vp->bus_master = (vp->options & 16) ? 1 : 0;
602 vp->media_override = 7;
607 list_add(&vp->list, &root_corkscrew_dev);
610 printk(KERN_INFO "%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
612 spin_lock_init(&vp->lock);
614 /* Read the station address from the EEPROM. */
616 for (i = 0; i < 0x18; i++) {
617 short *phys_addr = (short *) dev->dev_addr;
619 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
620 /* Pause for at least 162 us. for the read to take place. */
621 for (timer = 4; timer >= 0; timer--) {
623 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
626 eeprom[i] = inw(ioaddr + Wn0EepromData);
627 checksum ^= eeprom[i];
629 phys_addr[i] = htons(eeprom[i]);
631 checksum = (checksum ^ (checksum >> 8)) & 0xff;
632 if (checksum != 0x00)
633 printk(" ***INVALID CHECKSUM %4.4x*** ", checksum);
634 printk(" %s", print_mac(mac, dev->dev_addr));
635 if (eeprom[16] == 0x11c7) { /* Corkscrew */
636 if (request_dma(dev->dma, "3c515")) {
637 printk(", DMA %d allocation failed", dev->dma);
640 printk(", DMA %d", dev->dma);
642 printk(", IRQ %d\n", dev->irq);
643 /* Tell them about an invalid IRQ. */
644 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
645 printk(KERN_WARNING " *** Warning: this IRQ is unlikely to work! ***\n");
648 char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
649 union wn3_config config;
651 vp->available_media = inw(ioaddr + Wn3_Options);
652 config.i = inl(ioaddr + Wn3_Config);
653 if (corkscrew_debug > 1)
654 printk(KERN_INFO " Internal config register is %4.4x, transceivers %#x.\n",
655 config.i, inw(ioaddr + Wn3_Options));
656 printk(KERN_INFO " %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
657 8 << config.u.ram_size,
658 config.u.ram_width ? "word" : "byte",
659 ram_split[config.u.ram_split],
660 config.u.autoselect ? "autoselect/" : "",
661 media_tbl[config.u.xcvr].name);
662 dev->if_port = config.u.xcvr;
663 vp->default_media = config.u.xcvr;
664 vp->autoselect = config.u.autoselect;
666 if (vp->media_override != 7) {
667 printk(KERN_INFO " Media override to transceiver type %d (%s).\n",
669 media_tbl[vp->media_override].name);
670 dev->if_port = vp->media_override;
673 vp->capabilities = eeprom[16];
674 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
675 /* Rx is broken at 10mbps, so we always disable it. */
676 /* vp->full_bus_master_rx = 0; */
677 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
679 /* The 3c51x-specific entries in the device structure. */
680 dev->open = &corkscrew_open;
681 dev->hard_start_xmit = &corkscrew_start_xmit;
682 dev->tx_timeout = &corkscrew_timeout;
683 dev->watchdog_timeo = (400 * HZ) / 1000;
684 dev->stop = &corkscrew_close;
685 dev->get_stats = &corkscrew_get_stats;
686 dev->set_multicast_list = &set_rx_mode;
687 dev->ethtool_ops = &netdev_ethtool_ops;
689 return register_netdev(dev);
693 static int corkscrew_open(struct net_device *dev)
695 int ioaddr = dev->base_addr;
696 struct corkscrew_private *vp = netdev_priv(dev);
697 union wn3_config config;
700 /* Before initializing select the active media port. */
703 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
704 config.i = inl(ioaddr + Wn3_Config);
706 if (vp->media_override != 7) {
707 if (corkscrew_debug > 1)
708 printk(KERN_INFO "%s: Media override to transceiver %d (%s).\n",
709 dev->name, vp->media_override,
710 media_tbl[vp->media_override].name);
711 dev->if_port = vp->media_override;
712 } else if (vp->autoselect) {
713 /* Find first available media type, starting with 100baseTx. */
715 while (!(vp->available_media & media_tbl[dev->if_port].mask))
716 dev->if_port = media_tbl[dev->if_port].next;
718 if (corkscrew_debug > 1)
719 printk("%s: Initial media type %s.\n",
720 dev->name, media_tbl[dev->if_port].name);
722 init_timer(&vp->timer);
723 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
724 vp->timer.data = (unsigned long) dev;
725 vp->timer.function = &corkscrew_timer; /* timer handler */
726 add_timer(&vp->timer);
728 dev->if_port = vp->default_media;
730 config.u.xcvr = dev->if_port;
731 outl(config.i, ioaddr + Wn3_Config);
733 if (corkscrew_debug > 1) {
734 printk("%s: corkscrew_open() InternalConfig %8.8x.\n",
735 dev->name, config.i);
738 outw(TxReset, ioaddr + EL3_CMD);
739 for (i = 20; i >= 0; i--)
740 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
743 outw(RxReset, ioaddr + EL3_CMD);
744 /* Wait a few ticks for the RxReset command to complete. */
745 for (i = 20; i >= 0; i--)
746 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
749 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
751 /* Use the now-standard shared IRQ implementation. */
752 if (vp->capabilities == 0x11c7) {
753 /* Corkscrew: Cannot share ISA resources. */
756 || request_irq(dev->irq, &corkscrew_interrupt, 0,
757 vp->product_name, dev)) return -EAGAIN;
758 enable_dma(dev->dma);
759 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
760 } else if (request_irq(dev->irq, &corkscrew_interrupt, IRQF_SHARED,
761 vp->product_name, dev)) {
765 if (corkscrew_debug > 1) {
767 printk("%s: corkscrew_open() irq %d media status %4.4x.\n",
768 dev->name, dev->irq, inw(ioaddr + Wn4_Media));
771 /* Set the station address and mask in window 2 each time opened. */
773 for (i = 0; i < 6; i++)
774 outb(dev->dev_addr[i], ioaddr + i);
775 for (; i < 12; i += 2)
778 if (dev->if_port == 3)
779 /* Start the thinnet transceiver. We should really wait 50ms... */
780 outw(StartCoax, ioaddr + EL3_CMD);
782 outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
783 media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
785 /* Switch to the stats window, and clear all stats by reading. */
786 outw(StatsDisable, ioaddr + EL3_CMD);
788 for (i = 0; i < 10; i++)
792 /* New: On the Vortex we must also clear the BadSSD counter. */
795 /* ..and on the Boomerang we enable the extra statistics bits. */
796 outw(0x0040, ioaddr + Wn4_NetDiag);
798 /* Switch to register set 7 for normal use. */
801 if (vp->full_bus_master_rx) { /* Boomerang bus master. */
802 vp->cur_rx = vp->dirty_rx = 0;
803 if (corkscrew_debug > 2)
804 printk("%s: Filling in the Rx ring.\n",
806 for (i = 0; i < RX_RING_SIZE; i++) {
808 if (i < (RX_RING_SIZE - 1))
809 vp->rx_ring[i].next =
810 isa_virt_to_bus(&vp->rx_ring[i + 1]);
812 vp->rx_ring[i].next = 0;
813 vp->rx_ring[i].status = 0; /* Clear complete bit. */
814 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
815 skb = dev_alloc_skb(PKT_BUF_SZ);
816 vp->rx_skbuff[i] = skb;
818 break; /* Bad news! */
819 skb->dev = dev; /* Mark as being used by this device. */
820 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
821 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
823 vp->rx_ring[i - 1].next = isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
824 outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
826 if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
827 vp->cur_tx = vp->dirty_tx = 0;
828 outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
829 /* Clear the Tx ring. */
830 for (i = 0; i < TX_RING_SIZE; i++)
831 vp->tx_skbuff[i] = NULL;
832 outl(0, ioaddr + DownListPtr);
834 /* Set receiver mode: presumably accept b-case and phys addr only. */
836 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
838 netif_start_queue(dev);
840 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
841 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
842 /* Allow status bits to be seen. */
843 outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
844 (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
845 (vp->full_bus_master_rx ? UpComplete : RxComplete) |
846 (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
847 /* Ack all pending events, and set active indicator mask. */
848 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
850 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
851 | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
857 static void corkscrew_timer(unsigned long data)
860 struct net_device *dev = (struct net_device *) data;
861 struct corkscrew_private *vp = netdev_priv(dev);
862 int ioaddr = dev->base_addr;
866 if (corkscrew_debug > 1)
867 printk("%s: Media selection timer tick happened, %s.\n",
868 dev->name, media_tbl[dev->if_port].name);
870 spin_lock_irqsave(&vp->lock, flags);
873 int old_window = inw(ioaddr + EL3_CMD) >> 13;
876 media_status = inw(ioaddr + Wn4_Media);
877 switch (dev->if_port) {
880 case 5: /* 10baseT, 100baseTX, 100baseFX */
881 if (media_status & Media_LnkBeat) {
883 if (corkscrew_debug > 1)
884 printk("%s: Media %s has link beat, %x.\n",
886 media_tbl[dev->if_port].name,
888 } else if (corkscrew_debug > 1)
889 printk("%s: Media %s is has no link beat, %x.\n",
891 media_tbl[dev->if_port].name,
895 default: /* Other media types handled by Tx timeouts. */
896 if (corkscrew_debug > 1)
897 printk("%s: Media %s is has no indication, %x.\n",
899 media_tbl[dev->if_port].name,
904 union wn3_config config;
908 media_tbl[dev->if_port].next;
910 while (!(vp->available_media & media_tbl[dev->if_port].mask));
912 if (dev->if_port == 8) { /* Go back to default. */
913 dev->if_port = vp->default_media;
914 if (corkscrew_debug > 1)
915 printk("%s: Media selection failing, using default %s port.\n",
917 media_tbl[dev->if_port].name);
919 if (corkscrew_debug > 1)
920 printk("%s: Media selection failed, now trying %s port.\n",
922 media_tbl[dev->if_port].name);
923 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
924 add_timer(&vp->timer);
926 outw((media_status & ~(Media_10TP | Media_SQE)) |
927 media_tbl[dev->if_port].media_bits,
931 config.i = inl(ioaddr + Wn3_Config);
932 config.u.xcvr = dev->if_port;
933 outl(config.i, ioaddr + Wn3_Config);
935 outw(dev->if_port == 3 ? StartCoax : StopCoax,
938 EL3WINDOW(old_window);
941 spin_unlock_irqrestore(&vp->lock, flags);
942 if (corkscrew_debug > 1)
943 printk("%s: Media selection timer finished, %s.\n",
944 dev->name, media_tbl[dev->if_port].name);
946 #endif /* AUTOMEDIA */
950 static void corkscrew_timeout(struct net_device *dev)
953 struct corkscrew_private *vp = netdev_priv(dev);
954 int ioaddr = dev->base_addr;
957 "%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
958 dev->name, inb(ioaddr + TxStatus),
959 inw(ioaddr + EL3_STATUS));
960 /* Slight code bloat to be user friendly. */
961 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
963 "%s: Transmitter encountered 16 collisions -- network"
964 " network cable problem?\n", dev->name);
965 #ifndef final_version
966 printk(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
967 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
969 printk(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
971 for (i = 0; i < TX_RING_SIZE; i++) {
972 printk(" %d: %p length %8.8x status %8.8x\n", i,
974 vp->tx_ring[i].length, vp->tx_ring[i].status);
977 /* Issue TX_RESET and TX_START commands. */
978 outw(TxReset, ioaddr + EL3_CMD);
979 for (i = 20; i >= 0; i--)
980 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
982 outw(TxEnable, ioaddr + EL3_CMD);
983 dev->trans_start = jiffies;
984 vp->stats.tx_errors++;
985 vp->stats.tx_dropped++;
986 netif_wake_queue(dev);
989 static int corkscrew_start_xmit(struct sk_buff *skb,
990 struct net_device *dev)
992 struct corkscrew_private *vp = netdev_priv(dev);
993 int ioaddr = dev->base_addr;
995 /* Block a timer-based transmit from overlapping. */
997 netif_stop_queue(dev);
999 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1000 /* Calculate the next Tx descriptor entry. */
1001 int entry = vp->cur_tx % TX_RING_SIZE;
1002 struct boom_tx_desc *prev_entry;
1003 unsigned long flags;
1006 if (vp->tx_full) /* No room to transmit with */
1008 if (vp->cur_tx != 0)
1009 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1012 if (corkscrew_debug > 3)
1013 printk("%s: Trying to send a packet, Tx index %d.\n",
1014 dev->name, vp->cur_tx);
1015 /* vp->tx_full = 1; */
1016 vp->tx_skbuff[entry] = skb;
1017 vp->tx_ring[entry].next = 0;
1018 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1019 vp->tx_ring[entry].length = skb->len | 0x80000000;
1020 vp->tx_ring[entry].status = skb->len | 0x80000000;
1022 spin_lock_irqsave(&vp->lock, flags);
1023 outw(DownStall, ioaddr + EL3_CMD);
1024 /* Wait for the stall to complete. */
1025 for (i = 20; i >= 0; i--)
1026 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1029 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1030 if (inl(ioaddr + DownListPtr) == 0) {
1031 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1032 ioaddr + DownListPtr);
1035 outw(DownUnstall, ioaddr + EL3_CMD);
1036 spin_unlock_irqrestore(&vp->lock, flags);
1039 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1041 else { /* Clear previous interrupt enable. */
1043 prev_entry->status &= ~0x80000000;
1044 netif_wake_queue(dev);
1046 dev->trans_start = jiffies;
1049 /* Put out the doubleword header... */
1050 outl(skb->len, ioaddr + TX_FIFO);
1051 vp->stats.tx_bytes += skb->len;
1052 #ifdef VORTEX_BUS_MASTER
1053 if (vp->bus_master) {
1054 /* Set the bus-master controller to transfer the packet. */
1055 outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
1056 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1058 outw(StartDMADown, ioaddr + EL3_CMD);
1059 /* queue will be woken at the DMADone interrupt. */
1061 /* ... and the packet rounded to a doubleword. */
1062 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1064 if (inw(ioaddr + TxFree) > 1536) {
1065 netif_wake_queue(dev);
1067 /* Interrupt us when the FIFO has room for max-sized packet. */
1068 outw(SetTxThreshold + (1536 >> 2),
1072 /* ... and the packet rounded to a doubleword. */
1073 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1075 if (inw(ioaddr + TxFree) > 1536) {
1076 netif_wake_queue(dev);
1078 /* Interrupt us when the FIFO has room for max-sized packet. */
1079 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1080 #endif /* bus master */
1082 dev->trans_start = jiffies;
1084 /* Clear the Tx status stack. */
1089 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1090 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1091 if (corkscrew_debug > 2)
1092 printk("%s: Tx error, status %2.2x.\n",
1093 dev->name, tx_status);
1094 if (tx_status & 0x04)
1095 vp->stats.tx_fifo_errors++;
1096 if (tx_status & 0x38)
1097 vp->stats.tx_aborted_errors++;
1098 if (tx_status & 0x30) {
1100 outw(TxReset, ioaddr + EL3_CMD);
1101 for (j = 20; j >= 0; j--)
1102 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1105 outw(TxEnable, ioaddr + EL3_CMD);
1107 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1113 /* The interrupt handler does all of the Rx thread work and cleans up
1114 after the Tx thread. */
1116 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1118 /* Use the now-standard shared IRQ implementation. */
1119 struct net_device *dev = dev_id;
1120 struct corkscrew_private *lp = netdev_priv(dev);
1123 int i = max_interrupt_work;
1125 ioaddr = dev->base_addr;
1126 latency = inb(ioaddr + Timer);
1128 spin_lock(&lp->lock);
1130 status = inw(ioaddr + EL3_STATUS);
1132 if (corkscrew_debug > 4)
1133 printk("%s: interrupt, status %4.4x, timer %d.\n",
1134 dev->name, status, latency);
1135 if ((status & 0xE000) != 0xE000) {
1136 static int donedidthis;
1137 /* Some interrupt controllers store a bogus interrupt from boot-time.
1138 Ignore a single early interrupt, but don't hang the machine for
1139 other interrupt problems. */
1140 if (donedidthis++ > 100) {
1141 printk(KERN_ERR "%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1142 dev->name, status, netif_running(dev));
1143 free_irq(dev->irq, dev);
1149 if (corkscrew_debug > 5)
1150 printk("%s: In interrupt loop, status %4.4x.\n",
1152 if (status & RxComplete)
1155 if (status & TxAvailable) {
1156 if (corkscrew_debug > 5)
1157 printk(" TX room bit was handled.\n");
1158 /* There's room in the FIFO for a full-sized packet. */
1159 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1160 netif_wake_queue(dev);
1162 if (status & DownComplete) {
1163 unsigned int dirty_tx = lp->dirty_tx;
1165 while (lp->cur_tx - dirty_tx > 0) {
1166 int entry = dirty_tx % TX_RING_SIZE;
1167 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1168 break; /* It still hasn't been processed. */
1169 if (lp->tx_skbuff[entry]) {
1170 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1171 lp->tx_skbuff[entry] = NULL;
1175 lp->dirty_tx = dirty_tx;
1176 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1177 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1179 netif_wake_queue(dev);
1182 #ifdef VORTEX_BUS_MASTER
1183 if (status & DMADone) {
1184 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1185 dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1186 netif_wake_queue(dev);
1189 if (status & UpComplete) {
1191 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1193 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1194 /* Handle all uncommon interrupts at once. */
1195 if (status & RxEarly) { /* Rx early is unused. */
1197 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1199 if (status & StatsFull) { /* Empty statistics. */
1200 static int DoneDidThat;
1201 if (corkscrew_debug > 4)
1202 printk("%s: Updating stats.\n", dev->name);
1203 update_stats(ioaddr, dev);
1204 /* DEBUG HACK: Disable statistics as an interrupt source. */
1205 /* This occurs when we have the wrong media type! */
1206 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1208 printk("%s: Updating stats failed, disabling stats as an"
1209 " interrupt source.\n", dev->name);
1210 for (win = 0; win < 8; win++) {
1212 printk("\n Vortex window %d:", win);
1213 for (reg = 0; reg < 16; reg++)
1214 printk(" %2.2x", inb(ioaddr + reg));
1217 outw(SetIntrEnb | TxAvailable |
1218 RxComplete | AdapterFailure |
1219 UpComplete | DownComplete |
1220 TxComplete, ioaddr + EL3_CMD);
1224 if (status & AdapterFailure) {
1225 /* Adapter failure requires Rx reset and reinit. */
1226 outw(RxReset, ioaddr + EL3_CMD);
1227 /* Set the Rx filter to the current state. */
1229 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1230 outw(AckIntr | AdapterFailure,
1236 printk(KERN_ERR "%s: Too much work in interrupt, status %4.4x. "
1237 "Disabling functions (%4.4x).\n", dev->name,
1238 status, SetStatusEnb | ((~status) & 0x7FE));
1239 /* Disable all pending interrupts. */
1240 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1241 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1244 /* Acknowledge the IRQ. */
1245 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1247 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1249 spin_unlock(&lp->lock);
1251 if (corkscrew_debug > 4)
1252 printk("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1256 static int corkscrew_rx(struct net_device *dev)
1258 struct corkscrew_private *vp = netdev_priv(dev);
1259 int ioaddr = dev->base_addr;
1263 if (corkscrew_debug > 5)
1264 printk(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
1265 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1266 while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
1267 if (rx_status & 0x4000) { /* Error, update stats. */
1268 unsigned char rx_error = inb(ioaddr + RxErrors);
1269 if (corkscrew_debug > 2)
1270 printk(" Rx error: status %2.2x.\n",
1272 vp->stats.rx_errors++;
1273 if (rx_error & 0x01)
1274 vp->stats.rx_over_errors++;
1275 if (rx_error & 0x02)
1276 vp->stats.rx_length_errors++;
1277 if (rx_error & 0x04)
1278 vp->stats.rx_frame_errors++;
1279 if (rx_error & 0x08)
1280 vp->stats.rx_crc_errors++;
1281 if (rx_error & 0x10)
1282 vp->stats.rx_length_errors++;
1284 /* The packet length: up to 4.5K!. */
1285 short pkt_len = rx_status & 0x1fff;
1286 struct sk_buff *skb;
1288 skb = dev_alloc_skb(pkt_len + 5 + 2);
1289 if (corkscrew_debug > 4)
1290 printk("Receiving packet size %d status %4.4x.\n",
1291 pkt_len, rx_status);
1293 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1294 /* 'skb_put()' points to the start of sk_buff data area. */
1295 insl(ioaddr + RX_FIFO,
1296 skb_put(skb, pkt_len),
1297 (pkt_len + 3) >> 2);
1298 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
1299 skb->protocol = eth_type_trans(skb, dev);
1301 dev->last_rx = jiffies;
1302 vp->stats.rx_packets++;
1303 vp->stats.rx_bytes += pkt_len;
1304 /* Wait a limited time to go to next packet. */
1305 for (i = 200; i >= 0; i--)
1306 if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
1309 } else if (corkscrew_debug)
1310 printk("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
1312 outw(RxDiscard, ioaddr + EL3_CMD);
1313 vp->stats.rx_dropped++;
1314 /* Wait a limited time to skip this packet. */
1315 for (i = 200; i >= 0; i--)
1316 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1322 static int boomerang_rx(struct net_device *dev)
1324 struct corkscrew_private *vp = netdev_priv(dev);
1325 int entry = vp->cur_rx % RX_RING_SIZE;
1326 int ioaddr = dev->base_addr;
1329 if (corkscrew_debug > 5)
1330 printk(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
1331 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1332 while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
1333 if (rx_status & RxDError) { /* Error, update stats. */
1334 unsigned char rx_error = rx_status >> 16;
1335 if (corkscrew_debug > 2)
1336 printk(" Rx error: status %2.2x.\n",
1338 vp->stats.rx_errors++;
1339 if (rx_error & 0x01)
1340 vp->stats.rx_over_errors++;
1341 if (rx_error & 0x02)
1342 vp->stats.rx_length_errors++;
1343 if (rx_error & 0x04)
1344 vp->stats.rx_frame_errors++;
1345 if (rx_error & 0x08)
1346 vp->stats.rx_crc_errors++;
1347 if (rx_error & 0x10)
1348 vp->stats.rx_length_errors++;
1350 /* The packet length: up to 4.5K!. */
1351 short pkt_len = rx_status & 0x1fff;
1352 struct sk_buff *skb;
1354 vp->stats.rx_bytes += pkt_len;
1355 if (corkscrew_debug > 4)
1356 printk("Receiving packet size %d status %4.4x.\n",
1357 pkt_len, rx_status);
1359 /* Check if the packet is long enough to just accept without
1360 copying to a properly sized skbuff. */
1361 if (pkt_len < rx_copybreak
1362 && (skb = dev_alloc_skb(pkt_len + 4)) != 0) {
1363 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1364 /* 'skb_put()' points to the start of sk_buff data area. */
1365 memcpy(skb_put(skb, pkt_len),
1366 isa_bus_to_virt(vp->rx_ring[entry].
1371 /* Pass up the skbuff already on the Rx ring. */
1372 skb = vp->rx_skbuff[entry];
1373 vp->rx_skbuff[entry] = NULL;
1374 temp = skb_put(skb, pkt_len);
1375 /* Remove this checking code for final release. */
1376 if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
1377 printk("%s: Warning -- the skbuff addresses do not match"
1378 " in boomerang_rx: %p vs. %p / %p.\n",
1380 isa_bus_to_virt(vp->
1386 skb->protocol = eth_type_trans(skb, dev);
1388 dev->last_rx = jiffies;
1389 vp->stats.rx_packets++;
1391 entry = (++vp->cur_rx) % RX_RING_SIZE;
1393 /* Refill the Rx ring buffers. */
1394 for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
1395 struct sk_buff *skb;
1396 entry = vp->dirty_rx % RX_RING_SIZE;
1397 if (vp->rx_skbuff[entry] == NULL) {
1398 skb = dev_alloc_skb(PKT_BUF_SZ);
1400 break; /* Bad news! */
1401 skb->dev = dev; /* Mark as being used by this device. */
1402 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1403 vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
1404 vp->rx_skbuff[entry] = skb;
1406 vp->rx_ring[entry].status = 0; /* Clear complete bit. */
1411 static int corkscrew_close(struct net_device *dev)
1413 struct corkscrew_private *vp = netdev_priv(dev);
1414 int ioaddr = dev->base_addr;
1417 netif_stop_queue(dev);
1419 if (corkscrew_debug > 1) {
1420 printk("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
1421 dev->name, inw(ioaddr + EL3_STATUS),
1422 inb(ioaddr + TxStatus));
1423 printk("%s: corkscrew close stats: rx_nocopy %d rx_copy %d"
1424 " tx_queued %d.\n", dev->name, rx_nocopy, rx_copy,
1428 del_timer(&vp->timer);
1430 /* Turn off statistics ASAP. We update lp->stats below. */
1431 outw(StatsDisable, ioaddr + EL3_CMD);
1433 /* Disable the receiver and transmitter. */
1434 outw(RxDisable, ioaddr + EL3_CMD);
1435 outw(TxDisable, ioaddr + EL3_CMD);
1437 if (dev->if_port == XCVR_10base2)
1438 /* Turn off thinnet power. Green! */
1439 outw(StopCoax, ioaddr + EL3_CMD);
1441 free_irq(dev->irq, dev);
1443 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1445 update_stats(ioaddr, dev);
1446 if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
1447 outl(0, ioaddr + UpListPtr);
1448 for (i = 0; i < RX_RING_SIZE; i++)
1449 if (vp->rx_skbuff[i]) {
1450 dev_kfree_skb(vp->rx_skbuff[i]);
1451 vp->rx_skbuff[i] = NULL;
1454 if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
1455 outl(0, ioaddr + DownListPtr);
1456 for (i = 0; i < TX_RING_SIZE; i++)
1457 if (vp->tx_skbuff[i]) {
1458 dev_kfree_skb(vp->tx_skbuff[i]);
1459 vp->tx_skbuff[i] = NULL;
1466 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
1468 struct corkscrew_private *vp = netdev_priv(dev);
1469 unsigned long flags;
1471 if (netif_running(dev)) {
1472 spin_lock_irqsave(&vp->lock, flags);
1473 update_stats(dev->base_addr, dev);
1474 spin_unlock_irqrestore(&vp->lock, flags);
1479 /* Update statistics.
1480 Unlike with the EL3 we need not worry about interrupts changing
1481 the window setting from underneath us, but we must still guard
1482 against a race condition with a StatsUpdate interrupt updating the
1483 table. This is done by checking that the ASM (!) code generated uses
1484 atomic updates with '+='.
1486 static void update_stats(int ioaddr, struct net_device *dev)
1488 struct corkscrew_private *vp = netdev_priv(dev);
1490 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1491 /* Switch to the stats window, and read everything. */
1493 vp->stats.tx_carrier_errors += inb(ioaddr + 0);
1494 vp->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1495 /* Multiple collisions. */ inb(ioaddr + 2);
1496 vp->stats.collisions += inb(ioaddr + 3);
1497 vp->stats.tx_window_errors += inb(ioaddr + 4);
1498 vp->stats.rx_fifo_errors += inb(ioaddr + 5);
1499 vp->stats.tx_packets += inb(ioaddr + 6);
1500 vp->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1501 /* Rx packets */ inb(ioaddr + 7);
1502 /* Must read to clear */
1503 /* Tx deferrals */ inb(ioaddr + 8);
1504 /* Don't bother with register 9, an extension of registers 6&7.
1505 If we do use the 6&7 values the atomic update assumption above
1507 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1509 /* New: On the Vortex we must also clear the BadSSD counter. */
1513 /* We change back to window 7 (not 1) with the Vortex. */
1518 /* This new version of set_rx_mode() supports v1.4 kernels.
1519 The Vortex chip has no documented multicast filter, so the only
1520 multicast setting is to receive all multicast frames. At least
1521 the chip has a very clean way to set the mode, unlike many others. */
1522 static void set_rx_mode(struct net_device *dev)
1524 int ioaddr = dev->base_addr;
1527 if (dev->flags & IFF_PROMISC) {
1528 if (corkscrew_debug > 3)
1529 printk("%s: Setting promiscuous mode.\n",
1531 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1532 } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) {
1533 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1535 new_mode = SetRxFilter | RxStation | RxBroadcast;
1537 outw(new_mode, ioaddr + EL3_CMD);
1540 static void netdev_get_drvinfo(struct net_device *dev,
1541 struct ethtool_drvinfo *info)
1543 strcpy(info->driver, DRV_NAME);
1544 strcpy(info->version, DRV_VERSION);
1545 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1548 static u32 netdev_get_msglevel(struct net_device *dev)
1550 return corkscrew_debug;
1553 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1555 corkscrew_debug = level;
1558 static const struct ethtool_ops netdev_ethtool_ops = {
1559 .get_drvinfo = netdev_get_drvinfo,
1560 .get_msglevel = netdev_get_msglevel,
1561 .set_msglevel = netdev_set_msglevel,
1566 void cleanup_module(void)
1568 while (!list_empty(&root_corkscrew_dev)) {
1569 struct net_device *dev;
1570 struct corkscrew_private *vp;
1572 vp = list_entry(root_corkscrew_dev.next,
1573 struct corkscrew_private, list);
1575 unregister_netdev(dev);
1584 * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c515.c"