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);
576 irq = pnp_irq(idev, 0);
577 vp->dev = &idev->dev;
579 irq = inw(ioaddr + 0x2002) & 15;
582 dev->base_addr = ioaddr;
584 dev->dma = inw(ioaddr + 0x2000) & 7;
585 vp->product_name = "3c515";
586 vp->options = dev->mem_start;
590 if (card_number >= MAX_UNITS)
593 vp->options = options[card_number];
596 if (vp->options >= 0) {
597 vp->media_override = vp->options & 7;
598 if (vp->media_override == 2)
599 vp->media_override = 0;
600 vp->full_duplex = (vp->options & 8) ? 1 : 0;
601 vp->bus_master = (vp->options & 16) ? 1 : 0;
603 vp->media_override = 7;
608 list_add(&vp->list, &root_corkscrew_dev);
611 printk(KERN_INFO "%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
613 spin_lock_init(&vp->lock);
615 /* Read the station address from the EEPROM. */
617 for (i = 0; i < 0x18; i++) {
618 __be16 *phys_addr = (__be16 *) dev->dev_addr;
620 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
621 /* Pause for at least 162 us. for the read to take place. */
622 for (timer = 4; timer >= 0; timer--) {
624 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
627 eeprom[i] = inw(ioaddr + Wn0EepromData);
628 checksum ^= eeprom[i];
630 phys_addr[i] = htons(eeprom[i]);
632 checksum = (checksum ^ (checksum >> 8)) & 0xff;
633 if (checksum != 0x00)
634 printk(" ***INVALID CHECKSUM %4.4x*** ", checksum);
635 printk(" %s", print_mac(mac, dev->dev_addr));
636 if (eeprom[16] == 0x11c7) { /* Corkscrew */
637 if (request_dma(dev->dma, "3c515")) {
638 printk(", DMA %d allocation failed", dev->dma);
641 printk(", DMA %d", dev->dma);
643 printk(", IRQ %d\n", dev->irq);
644 /* Tell them about an invalid IRQ. */
645 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
646 printk(KERN_WARNING " *** Warning: this IRQ is unlikely to work! ***\n");
649 char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
652 vp->available_media = inw(ioaddr + Wn3_Options);
653 config = inl(ioaddr + Wn3_Config);
654 if (corkscrew_debug > 1)
655 printk(KERN_INFO " Internal config register is %4.4x, transceivers %#x.\n",
656 config, inw(ioaddr + Wn3_Options));
657 printk(KERN_INFO " %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
658 8 << config & Ram_size,
659 config & Ram_width ? "word" : "byte",
660 ram_split[(config & Ram_split) >> Ram_split_shift],
661 config & Autoselect ? "autoselect/" : "",
662 media_tbl[(config & Xcvr) >> Xcvr_shift].name);
663 vp->default_media = (config & Xcvr) >> Xcvr_shift;
664 vp->autoselect = config & Autoselect ? 1 : 0;
665 dev->if_port = vp->default_media;
667 if (vp->media_override != 7) {
668 printk(KERN_INFO " Media override to transceiver type %d (%s).\n",
670 media_tbl[vp->media_override].name);
671 dev->if_port = vp->media_override;
674 vp->capabilities = eeprom[16];
675 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
676 /* Rx is broken at 10mbps, so we always disable it. */
677 /* vp->full_bus_master_rx = 0; */
678 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
680 /* The 3c51x-specific entries in the device structure. */
681 dev->open = &corkscrew_open;
682 dev->hard_start_xmit = &corkscrew_start_xmit;
683 dev->tx_timeout = &corkscrew_timeout;
684 dev->watchdog_timeo = (400 * HZ) / 1000;
685 dev->stop = &corkscrew_close;
686 dev->get_stats = &corkscrew_get_stats;
687 dev->set_multicast_list = &set_rx_mode;
688 dev->ethtool_ops = &netdev_ethtool_ops;
690 return register_netdev(dev);
694 static int corkscrew_open(struct net_device *dev)
696 int ioaddr = dev->base_addr;
697 struct corkscrew_private *vp = netdev_priv(dev);
701 /* Before initializing select the active media port. */
704 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
705 config = inl(ioaddr + Wn3_Config);
707 if (vp->media_override != 7) {
708 if (corkscrew_debug > 1)
709 printk(KERN_INFO "%s: Media override to transceiver %d (%s).\n",
710 dev->name, vp->media_override,
711 media_tbl[vp->media_override].name);
712 dev->if_port = vp->media_override;
713 } else if (vp->autoselect) {
714 /* Find first available media type, starting with 100baseTx. */
716 while (!(vp->available_media & media_tbl[dev->if_port].mask))
717 dev->if_port = media_tbl[dev->if_port].next;
719 if (corkscrew_debug > 1)
720 printk("%s: Initial media type %s.\n",
721 dev->name, media_tbl[dev->if_port].name);
723 init_timer(&vp->timer);
724 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
725 vp->timer.data = (unsigned long) dev;
726 vp->timer.function = &corkscrew_timer; /* timer handler */
727 add_timer(&vp->timer);
729 dev->if_port = vp->default_media;
731 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
732 outl(config, ioaddr + Wn3_Config);
734 if (corkscrew_debug > 1) {
735 printk("%s: corkscrew_open() InternalConfig %8.8x.\n",
739 outw(TxReset, ioaddr + EL3_CMD);
740 for (i = 20; i >= 0; i--)
741 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
744 outw(RxReset, ioaddr + EL3_CMD);
745 /* Wait a few ticks for the RxReset command to complete. */
746 for (i = 20; i >= 0; i--)
747 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
750 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
752 /* Use the now-standard shared IRQ implementation. */
753 if (vp->capabilities == 0x11c7) {
754 /* Corkscrew: Cannot share ISA resources. */
757 || request_irq(dev->irq, &corkscrew_interrupt, 0,
758 vp->product_name, dev)) return -EAGAIN;
759 enable_dma(dev->dma);
760 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
761 } else if (request_irq(dev->irq, &corkscrew_interrupt, IRQF_SHARED,
762 vp->product_name, dev)) {
766 if (corkscrew_debug > 1) {
768 printk("%s: corkscrew_open() irq %d media status %4.4x.\n",
769 dev->name, dev->irq, inw(ioaddr + Wn4_Media));
772 /* Set the station address and mask in window 2 each time opened. */
774 for (i = 0; i < 6; i++)
775 outb(dev->dev_addr[i], ioaddr + i);
776 for (; i < 12; i += 2)
779 if (dev->if_port == 3)
780 /* Start the thinnet transceiver. We should really wait 50ms... */
781 outw(StartCoax, ioaddr + EL3_CMD);
783 outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
784 media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
786 /* Switch to the stats window, and clear all stats by reading. */
787 outw(StatsDisable, ioaddr + EL3_CMD);
789 for (i = 0; i < 10; i++)
793 /* New: On the Vortex we must also clear the BadSSD counter. */
796 /* ..and on the Boomerang we enable the extra statistics bits. */
797 outw(0x0040, ioaddr + Wn4_NetDiag);
799 /* Switch to register set 7 for normal use. */
802 if (vp->full_bus_master_rx) { /* Boomerang bus master. */
803 vp->cur_rx = vp->dirty_rx = 0;
804 if (corkscrew_debug > 2)
805 printk("%s: Filling in the Rx ring.\n",
807 for (i = 0; i < RX_RING_SIZE; i++) {
809 if (i < (RX_RING_SIZE - 1))
810 vp->rx_ring[i].next =
811 isa_virt_to_bus(&vp->rx_ring[i + 1]);
813 vp->rx_ring[i].next = 0;
814 vp->rx_ring[i].status = 0; /* Clear complete bit. */
815 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
816 skb = dev_alloc_skb(PKT_BUF_SZ);
817 vp->rx_skbuff[i] = skb;
819 break; /* Bad news! */
820 skb->dev = dev; /* Mark as being used by this device. */
821 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
822 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
824 vp->rx_ring[i - 1].next = isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
825 outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
827 if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
828 vp->cur_tx = vp->dirty_tx = 0;
829 outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
830 /* Clear the Tx ring. */
831 for (i = 0; i < TX_RING_SIZE; i++)
832 vp->tx_skbuff[i] = NULL;
833 outl(0, ioaddr + DownListPtr);
835 /* Set receiver mode: presumably accept b-case and phys addr only. */
837 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
839 netif_start_queue(dev);
841 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
842 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
843 /* Allow status bits to be seen. */
844 outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
845 (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
846 (vp->full_bus_master_rx ? UpComplete : RxComplete) |
847 (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
848 /* Ack all pending events, and set active indicator mask. */
849 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
851 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
852 | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
858 static void corkscrew_timer(unsigned long data)
861 struct net_device *dev = (struct net_device *) data;
862 struct corkscrew_private *vp = netdev_priv(dev);
863 int ioaddr = dev->base_addr;
867 if (corkscrew_debug > 1)
868 printk("%s: Media selection timer tick happened, %s.\n",
869 dev->name, media_tbl[dev->if_port].name);
871 spin_lock_irqsave(&vp->lock, flags);
874 int old_window = inw(ioaddr + EL3_CMD) >> 13;
877 media_status = inw(ioaddr + Wn4_Media);
878 switch (dev->if_port) {
881 case 5: /* 10baseT, 100baseTX, 100baseFX */
882 if (media_status & Media_LnkBeat) {
884 if (corkscrew_debug > 1)
885 printk("%s: Media %s has link beat, %x.\n",
887 media_tbl[dev->if_port].name,
889 } else if (corkscrew_debug > 1)
890 printk("%s: Media %s is has no link beat, %x.\n",
892 media_tbl[dev->if_port].name,
896 default: /* Other media types handled by Tx timeouts. */
897 if (corkscrew_debug > 1)
898 printk("%s: Media %s is has no indication, %x.\n",
900 media_tbl[dev->if_port].name,
909 media_tbl[dev->if_port].next;
911 while (!(vp->available_media & media_tbl[dev->if_port].mask));
913 if (dev->if_port == 8) { /* Go back to default. */
914 dev->if_port = vp->default_media;
915 if (corkscrew_debug > 1)
916 printk("%s: Media selection failing, using default %s port.\n",
918 media_tbl[dev->if_port].name);
920 if (corkscrew_debug > 1)
921 printk("%s: Media selection failed, now trying %s port.\n",
923 media_tbl[dev->if_port].name);
924 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
925 add_timer(&vp->timer);
927 outw((media_status & ~(Media_10TP | Media_SQE)) |
928 media_tbl[dev->if_port].media_bits,
932 config = inl(ioaddr + Wn3_Config);
933 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
934 outl(config, ioaddr + Wn3_Config);
936 outw(dev->if_port == 3 ? StartCoax : StopCoax,
939 EL3WINDOW(old_window);
942 spin_unlock_irqrestore(&vp->lock, flags);
943 if (corkscrew_debug > 1)
944 printk("%s: Media selection timer finished, %s.\n",
945 dev->name, media_tbl[dev->if_port].name);
947 #endif /* AUTOMEDIA */
951 static void corkscrew_timeout(struct net_device *dev)
954 struct corkscrew_private *vp = netdev_priv(dev);
955 int ioaddr = dev->base_addr;
958 "%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
959 dev->name, inb(ioaddr + TxStatus),
960 inw(ioaddr + EL3_STATUS));
961 /* Slight code bloat to be user friendly. */
962 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
964 "%s: Transmitter encountered 16 collisions -- network"
965 " network cable problem?\n", dev->name);
966 #ifndef final_version
967 printk(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
968 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
970 printk(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
972 for (i = 0; i < TX_RING_SIZE; i++) {
973 printk(" %d: %p length %8.8x status %8.8x\n", i,
975 vp->tx_ring[i].length, vp->tx_ring[i].status);
978 /* Issue TX_RESET and TX_START commands. */
979 outw(TxReset, ioaddr + EL3_CMD);
980 for (i = 20; i >= 0; i--)
981 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
983 outw(TxEnable, ioaddr + EL3_CMD);
984 dev->trans_start = jiffies;
985 dev->stats.tx_errors++;
986 dev->stats.tx_dropped++;
987 netif_wake_queue(dev);
990 static int corkscrew_start_xmit(struct sk_buff *skb,
991 struct net_device *dev)
993 struct corkscrew_private *vp = netdev_priv(dev);
994 int ioaddr = dev->base_addr;
996 /* Block a timer-based transmit from overlapping. */
998 netif_stop_queue(dev);
1000 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1001 /* Calculate the next Tx descriptor entry. */
1002 int entry = vp->cur_tx % TX_RING_SIZE;
1003 struct boom_tx_desc *prev_entry;
1004 unsigned long flags;
1007 if (vp->tx_full) /* No room to transmit with */
1009 if (vp->cur_tx != 0)
1010 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1013 if (corkscrew_debug > 3)
1014 printk("%s: Trying to send a packet, Tx index %d.\n",
1015 dev->name, vp->cur_tx);
1016 /* vp->tx_full = 1; */
1017 vp->tx_skbuff[entry] = skb;
1018 vp->tx_ring[entry].next = 0;
1019 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1020 vp->tx_ring[entry].length = skb->len | 0x80000000;
1021 vp->tx_ring[entry].status = skb->len | 0x80000000;
1023 spin_lock_irqsave(&vp->lock, flags);
1024 outw(DownStall, ioaddr + EL3_CMD);
1025 /* Wait for the stall to complete. */
1026 for (i = 20; i >= 0; i--)
1027 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1030 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1031 if (inl(ioaddr + DownListPtr) == 0) {
1032 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1033 ioaddr + DownListPtr);
1036 outw(DownUnstall, ioaddr + EL3_CMD);
1037 spin_unlock_irqrestore(&vp->lock, flags);
1040 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1042 else { /* Clear previous interrupt enable. */
1044 prev_entry->status &= ~0x80000000;
1045 netif_wake_queue(dev);
1047 dev->trans_start = jiffies;
1050 /* Put out the doubleword header... */
1051 outl(skb->len, ioaddr + TX_FIFO);
1052 dev->stats.tx_bytes += skb->len;
1053 #ifdef VORTEX_BUS_MASTER
1054 if (vp->bus_master) {
1055 /* Set the bus-master controller to transfer the packet. */
1056 outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
1057 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1059 outw(StartDMADown, ioaddr + EL3_CMD);
1060 /* queue will be woken at the DMADone interrupt. */
1062 /* ... and the packet rounded to a doubleword. */
1063 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1065 if (inw(ioaddr + TxFree) > 1536) {
1066 netif_wake_queue(dev);
1068 /* Interrupt us when the FIFO has room for max-sized packet. */
1069 outw(SetTxThreshold + (1536 >> 2),
1073 /* ... and the packet rounded to a doubleword. */
1074 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1076 if (inw(ioaddr + TxFree) > 1536) {
1077 netif_wake_queue(dev);
1079 /* Interrupt us when the FIFO has room for max-sized packet. */
1080 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1081 #endif /* bus master */
1083 dev->trans_start = jiffies;
1085 /* Clear the Tx status stack. */
1090 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1091 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1092 if (corkscrew_debug > 2)
1093 printk("%s: Tx error, status %2.2x.\n",
1094 dev->name, tx_status);
1095 if (tx_status & 0x04)
1096 dev->stats.tx_fifo_errors++;
1097 if (tx_status & 0x38)
1098 dev->stats.tx_aborted_errors++;
1099 if (tx_status & 0x30) {
1101 outw(TxReset, ioaddr + EL3_CMD);
1102 for (j = 20; j >= 0; j--)
1103 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1106 outw(TxEnable, ioaddr + EL3_CMD);
1108 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1114 /* The interrupt handler does all of the Rx thread work and cleans up
1115 after the Tx thread. */
1117 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1119 /* Use the now-standard shared IRQ implementation. */
1120 struct net_device *dev = dev_id;
1121 struct corkscrew_private *lp = netdev_priv(dev);
1124 int i = max_interrupt_work;
1126 ioaddr = dev->base_addr;
1127 latency = inb(ioaddr + Timer);
1129 spin_lock(&lp->lock);
1131 status = inw(ioaddr + EL3_STATUS);
1133 if (corkscrew_debug > 4)
1134 printk("%s: interrupt, status %4.4x, timer %d.\n",
1135 dev->name, status, latency);
1136 if ((status & 0xE000) != 0xE000) {
1137 static int donedidthis;
1138 /* Some interrupt controllers store a bogus interrupt from boot-time.
1139 Ignore a single early interrupt, but don't hang the machine for
1140 other interrupt problems. */
1141 if (donedidthis++ > 100) {
1142 printk(KERN_ERR "%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1143 dev->name, status, netif_running(dev));
1144 free_irq(dev->irq, dev);
1150 if (corkscrew_debug > 5)
1151 printk("%s: In interrupt loop, status %4.4x.\n",
1153 if (status & RxComplete)
1156 if (status & TxAvailable) {
1157 if (corkscrew_debug > 5)
1158 printk(" TX room bit was handled.\n");
1159 /* There's room in the FIFO for a full-sized packet. */
1160 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1161 netif_wake_queue(dev);
1163 if (status & DownComplete) {
1164 unsigned int dirty_tx = lp->dirty_tx;
1166 while (lp->cur_tx - dirty_tx > 0) {
1167 int entry = dirty_tx % TX_RING_SIZE;
1168 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1169 break; /* It still hasn't been processed. */
1170 if (lp->tx_skbuff[entry]) {
1171 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1172 lp->tx_skbuff[entry] = NULL;
1176 lp->dirty_tx = dirty_tx;
1177 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1178 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1180 netif_wake_queue(dev);
1183 #ifdef VORTEX_BUS_MASTER
1184 if (status & DMADone) {
1185 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1186 dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1187 netif_wake_queue(dev);
1190 if (status & UpComplete) {
1192 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1194 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1195 /* Handle all uncommon interrupts at once. */
1196 if (status & RxEarly) { /* Rx early is unused. */
1198 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1200 if (status & StatsFull) { /* Empty statistics. */
1201 static int DoneDidThat;
1202 if (corkscrew_debug > 4)
1203 printk("%s: Updating stats.\n", dev->name);
1204 update_stats(ioaddr, dev);
1205 /* DEBUG HACK: Disable statistics as an interrupt source. */
1206 /* This occurs when we have the wrong media type! */
1207 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1209 printk("%s: Updating stats failed, disabling stats as an"
1210 " interrupt source.\n", dev->name);
1211 for (win = 0; win < 8; win++) {
1213 printk("\n Vortex window %d:", win);
1214 for (reg = 0; reg < 16; reg++)
1215 printk(" %2.2x", inb(ioaddr + reg));
1218 outw(SetIntrEnb | TxAvailable |
1219 RxComplete | AdapterFailure |
1220 UpComplete | DownComplete |
1221 TxComplete, ioaddr + EL3_CMD);
1225 if (status & AdapterFailure) {
1226 /* Adapter failure requires Rx reset and reinit. */
1227 outw(RxReset, ioaddr + EL3_CMD);
1228 /* Set the Rx filter to the current state. */
1230 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1231 outw(AckIntr | AdapterFailure,
1237 printk(KERN_ERR "%s: Too much work in interrupt, status %4.4x. "
1238 "Disabling functions (%4.4x).\n", dev->name,
1239 status, SetStatusEnb | ((~status) & 0x7FE));
1240 /* Disable all pending interrupts. */
1241 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1242 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1245 /* Acknowledge the IRQ. */
1246 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1248 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1250 spin_unlock(&lp->lock);
1252 if (corkscrew_debug > 4)
1253 printk("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1257 static int corkscrew_rx(struct net_device *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 dev->stats.rx_errors++;
1273 if (rx_error & 0x01)
1274 dev->stats.rx_over_errors++;
1275 if (rx_error & 0x02)
1276 dev->stats.rx_length_errors++;
1277 if (rx_error & 0x04)
1278 dev->stats.rx_frame_errors++;
1279 if (rx_error & 0x08)
1280 dev->stats.rx_crc_errors++;
1281 if (rx_error & 0x10)
1282 dev->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 dev->stats.rx_packets++;
1303 dev->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 dev->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 dev->stats.rx_errors++;
1339 if (rx_error & 0x01)
1340 dev->stats.rx_over_errors++;
1341 if (rx_error & 0x02)
1342 dev->stats.rx_length_errors++;
1343 if (rx_error & 0x04)
1344 dev->stats.rx_frame_errors++;
1345 if (rx_error & 0x08)
1346 dev->stats.rx_crc_errors++;
1347 if (rx_error & 0x10)
1348 dev->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 dev->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)) != NULL) {
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 dev->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 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1489 /* Switch to the stats window, and read everything. */
1491 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
1492 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1493 /* Multiple collisions. */ inb(ioaddr + 2);
1494 dev->stats.collisions += inb(ioaddr + 3);
1495 dev->stats.tx_window_errors += inb(ioaddr + 4);
1496 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
1497 dev->stats.tx_packets += inb(ioaddr + 6);
1498 dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1499 /* Rx packets */ inb(ioaddr + 7);
1500 /* Must read to clear */
1501 /* Tx deferrals */ inb(ioaddr + 8);
1502 /* Don't bother with register 9, an extension of registers 6&7.
1503 If we do use the 6&7 values the atomic update assumption above
1505 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1507 /* New: On the Vortex we must also clear the BadSSD counter. */
1511 /* We change back to window 7 (not 1) with the Vortex. */
1516 /* This new version of set_rx_mode() supports v1.4 kernels.
1517 The Vortex chip has no documented multicast filter, so the only
1518 multicast setting is to receive all multicast frames. At least
1519 the chip has a very clean way to set the mode, unlike many others. */
1520 static void set_rx_mode(struct net_device *dev)
1522 int ioaddr = dev->base_addr;
1525 if (dev->flags & IFF_PROMISC) {
1526 if (corkscrew_debug > 3)
1527 printk("%s: Setting promiscuous mode.\n",
1529 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1530 } else if ((dev->mc_list) || (dev->flags & IFF_ALLMULTI)) {
1531 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1533 new_mode = SetRxFilter | RxStation | RxBroadcast;
1535 outw(new_mode, ioaddr + EL3_CMD);
1538 static void netdev_get_drvinfo(struct net_device *dev,
1539 struct ethtool_drvinfo *info)
1541 strcpy(info->driver, DRV_NAME);
1542 strcpy(info->version, DRV_VERSION);
1543 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1546 static u32 netdev_get_msglevel(struct net_device *dev)
1548 return corkscrew_debug;
1551 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1553 corkscrew_debug = level;
1556 static const struct ethtool_ops netdev_ethtool_ops = {
1557 .get_drvinfo = netdev_get_drvinfo,
1558 .get_msglevel = netdev_get_msglevel,
1559 .set_msglevel = netdev_set_msglevel,
1564 void cleanup_module(void)
1566 while (!list_empty(&root_corkscrew_dev)) {
1567 struct net_device *dev;
1568 struct corkscrew_private *vp;
1570 vp = list_entry(root_corkscrew_dev.next,
1571 struct corkscrew_private, list);
1573 unregister_netdev(dev);
1582 * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c 3c515.c"