2 Written 1997-1998 by Donald Becker.
4 This software may be used and distributed according to the terms
5 of the GNU General Public License, incorporated herein by reference.
7 This driver is for the 3Com ISA EtherLink XL "Corkscrew" 3c515 ethercard.
9 The author may be reached as becker@scyld.com, or C/O
10 Scyld Computing Corporation
11 410 Severn Ave., Suite 210
15 2000/2/2- Added support for kernel-level ISAPnP
16 by Stephen Frost <sfrost@snowman.net> and Alessandro Zummo
17 Cleaned up for 2.3.x/softnet by Jeff Garzik and Alan Cox.
19 2001/11/17 - Added ethtool support (jgarzik)
21 2002/10/28 - Locking updates for 2.5 (alan@lxorguk.ukuu.org.uk)
25 #define DRV_NAME "3c515"
26 #define DRV_VERSION "0.99t-ac"
27 #define DRV_RELDATE "28-Oct-2002"
29 static char *version =
30 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " becker@scyld.com and others\n";
34 /* "Knobs" that adjust features and parameters. */
35 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
36 Setting to > 1512 effectively disables this feature. */
37 static int rx_copybreak = 200;
39 /* Allow setting MTU to a larger size, bypassing the normal ethernet setup. */
40 static const int mtu = 1500;
42 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
43 static int max_interrupt_work = 20;
45 /* Enable the automatic media selection code -- usually set. */
48 /* Allow the use of fragment bus master transfers instead of only
49 programmed-I/O for Vortex cards. Full-bus-master transfers are always
50 enabled by default on Boomerang cards. If VORTEX_BUS_MASTER is defined,
51 the feature may be turned on using 'options'. */
52 #define VORTEX_BUS_MASTER
54 /* A few values that may be tweaked. */
55 /* Keep the ring sizes a power of two for efficiency. */
56 #define TX_RING_SIZE 16
57 #define RX_RING_SIZE 16
58 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
60 #include <linux/module.h>
61 #include <linux/isapnp.h>
62 #include <linux/kernel.h>
63 #include <linux/netdevice.h>
64 #include <linux/string.h>
65 #include <linux/errno.h>
67 #include <linux/ioport.h>
68 #include <linux/skbuff.h>
69 #include <linux/etherdevice.h>
70 #include <linux/interrupt.h>
71 #include <linux/timer.h>
72 #include <linux/ethtool.h>
73 #include <linux/bitops.h>
75 #include <asm/uaccess.h>
80 #include <linux/delay.h>
84 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
85 MODULE_DESCRIPTION("3Com 3c515 Corkscrew driver");
86 MODULE_LICENSE("GPL");
87 MODULE_VERSION(DRV_VERSION);
89 /* "Knobs" for adjusting internal parameters. */
90 /* Put out somewhat more debugging messages. (0 - no msg, 1 minimal msgs). */
91 #define DRIVER_DEBUG 1
92 /* Some values here only for performance evaluation and path-coverage
94 static int rx_nocopy, rx_copy, queued_packet;
96 /* Number of times to check to see if the Tx FIFO has space, used in some
98 #define WAIT_TX_AVAIL 200
100 /* Operational parameter that usually are not changed. */
101 #define TX_TIMEOUT 40 /* Time in jiffies before concluding Tx hung */
103 /* The size here is somewhat misleading: the Corkscrew also uses the ISA
104 aliased registers at <base>+0x400.
106 #define CORKSCREW_TOTAL_SIZE 0x20
109 static int corkscrew_debug = DRIVER_DEBUG;
111 static int corkscrew_debug = 1;
114 #define CORKSCREW_ID 10
119 I. Board Compatibility
121 This device driver is designed for the 3Com 3c515 ISA Fast EtherLink XL,
122 3Com's ISA bus adapter for Fast Ethernet. Due to the unique I/O port layout,
123 it's not practical to integrate this driver with the other EtherLink drivers.
125 II. Board-specific settings
127 The Corkscrew has an EEPROM for configuration, but no special settings are
130 III. Driver operation
132 The 3c515 series use an interface that's very similar to the 3c900 "Boomerang"
133 PCI cards, with the bus master interface extensively modified to work with
136 The card is capable of full-bus-master transfers with separate
137 lists of transmit and receive descriptors, similar to the AMD LANCE/PCnet,
138 DEC Tulip and Intel Speedo3.
140 This driver uses a "RX_COPYBREAK" scheme rather than a fixed intermediate
141 receive buffer. This scheme allocates full-sized skbuffs as receive
142 buffers. The value RX_COPYBREAK is used as the copying breakpoint: it is
143 chosen to trade-off the memory wasted by passing the full-sized skbuff to
144 the queue layer for all frames vs. the copying cost of copying a frame to a
145 correctly-sized skbuff.
148 IIIC. Synchronization
149 The driver runs as two independent, single-threaded flows of control. One
150 is the send-packet routine, which enforces single-threaded use by the netif
151 layer. The other thread is the interrupt handler, which is single
152 threaded by the hardware and other software.
156 Thanks to Terry Murphy of 3Com for providing documentation and a development
159 The names "Vortex", "Boomerang" and "Corkscrew" are the internal 3Com
160 project names. I use these names to eliminate confusion -- 3Com product
161 numbers and names are very similar and often confused.
163 The new chips support both ethernet (1.5K) and FDDI (4.5K) frame sizes!
164 This driver only supports ethernet frames because of the recent MTU limit
165 of 1.5K, but the changes to support 4.5K are minimal.
168 /* Operational definitions.
169 These are not used by other compilation units and thus are not
170 exported in a ".h" file.
172 First the windows. There are eight register windows, with the command
173 and status registers available in each.
175 #define EL3WINDOW(win_num) outw(SelectWindow + (win_num), ioaddr + EL3_CMD)
177 #define EL3_STATUS 0x0e
179 /* The top five bits written to EL3_CMD are a command, the lower
180 11 bits are the parameter, if applicable.
181 Note that 11 parameters bits was fine for ethernet, but the new chips
182 can handle FDDI length frames (~4500 octets) and now parameters count
183 32-bit 'Dwords' rather than octets. */
186 TotalReset = 0 << 11, SelectWindow = 1 << 11, StartCoax = 2 << 11,
187 RxDisable = 3 << 11, RxEnable = 4 << 11, RxReset = 5 << 11,
188 UpStall = 6 << 11, UpUnstall = (6 << 11) + 1, DownStall = (6 << 11) + 2,
189 DownUnstall = (6 << 11) + 3, RxDiscard = 8 << 11, TxEnable = 9 << 11,
190 TxDisable = 10 << 11, TxReset = 11 << 11, FakeIntr = 12 << 11,
191 AckIntr = 13 << 11, SetIntrEnb = 14 << 11, SetStatusEnb = 15 << 11,
192 SetRxFilter = 16 << 11, SetRxThreshold = 17 << 11,
193 SetTxThreshold = 18 << 11, SetTxStart = 19 << 11, StartDMAUp = 20 << 11,
194 StartDMADown = (20 << 11) + 1, StatsEnable = 21 << 11,
195 StatsDisable = 22 << 11, StopCoax = 23 << 11,
198 /* The SetRxFilter command accepts the following classes: */
200 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
203 /* Bits in the general status register. */
204 enum corkscrew_status {
205 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
206 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
207 IntReq = 0x0040, StatsFull = 0x0080,
208 DMADone = 1 << 8, DownComplete = 1 << 9, UpComplete = 1 << 10,
209 DMAInProgress = 1 << 11, /* DMA controller is still busy. */
210 CmdInProgress = 1 << 12, /* EL3_CMD is still busy. */
213 /* Register window 1 offsets, the window used in normal operation.
214 On the Corkscrew this window is always mapped at offsets 0x10-0x1f. */
216 TX_FIFO = 0x10, RX_FIFO = 0x10, RxErrors = 0x14,
217 RxStatus = 0x18, Timer = 0x1A, TxStatus = 0x1B,
218 TxFree = 0x1C, /* Remaining free bytes in Tx buffer. */
222 #if defined(CORKSCREW)
223 Wn0EepromCmd = 0x200A, /* Corkscrew EEPROM command register. */
224 Wn0EepromData = 0x200C, /* Corkscrew EEPROM results register. */
226 Wn0EepromCmd = 10, /* Window 0: EEPROM command register. */
227 Wn0EepromData = 12, /* Window 0: EEPROM results register. */
230 enum Win0_EEPROM_bits {
231 EEPROM_Read = 0x80, EEPROM_WRITE = 0x40, EEPROM_ERASE = 0xC0,
232 EEPROM_EWENB = 0x30, /* Enable erasing/writing for 10 msec. */
233 EEPROM_EWDIS = 0x00, /* Disable EWENB before 10 msec timeout. */
236 /* EEPROM locations. */
238 PhysAddr01 = 0, PhysAddr23 = 1, PhysAddr45 = 2, ModelID = 3,
242 enum Window3 { /* Window 3: MAC/config bits. */
243 Wn3_Config = 0, Wn3_MAC_Ctrl = 6, Wn3_Options = 8,
250 Ram_split_shift = 16,
251 Ram_split = 3 << Ram_split_shift,
253 Xcvr = 7 << Xcvr_shift,
254 Autoselect = 0x1000000,
258 Wn4_NetDiag = 6, Wn4_Media = 10, /* Window 4: Xcvr/media bits. */
260 enum Win4_Media_bits {
261 Media_SQE = 0x0008, /* Enable SQE error counting for AUI. */
262 Media_10TP = 0x00C0, /* Enable link beat and jabber for 10baseT. */
263 Media_Lnk = 0x0080, /* Enable just link beat for 100TX/100FX. */
264 Media_LnkBeat = 0x0800,
266 enum Window7 { /* Window 7: Bus Master control. */
267 Wn7_MasterAddr = 0, Wn7_MasterLen = 6, Wn7_MasterStatus = 12,
270 /* Boomerang-style bus master control registers. Note ISA aliases! */
272 PktStatus = 0x400, DownListPtr = 0x404, FragAddr = 0x408, FragLen =
274 TxFreeThreshold = 0x40f, UpPktStatus = 0x410, UpListPtr = 0x418,
277 /* The Rx and Tx descriptor lists.
278 Caution Alpha hackers: these types are 32 bits! Note also the 8 byte
279 alignment contraint on tx_ring[] and rx_ring[]. */
280 struct boom_rx_desc {
287 /* Values for the Rx status entry. */
288 enum rx_desc_status {
289 RxDComplete = 0x00008000, RxDError = 0x4000,
290 /* See boomerang_rx() for actual error bits */
293 struct boom_tx_desc {
300 struct corkscrew_private {
301 const char *product_name;
302 struct list_head list;
303 struct net_device *our_dev;
304 /* The Rx and Tx rings are here to keep them quad-word-aligned. */
305 struct boom_rx_desc rx_ring[RX_RING_SIZE];
306 struct boom_tx_desc tx_ring[TX_RING_SIZE];
307 /* The addresses of transmit- and receive-in-place skbuffs. */
308 struct sk_buff *rx_skbuff[RX_RING_SIZE];
309 struct sk_buff *tx_skbuff[TX_RING_SIZE];
310 unsigned int cur_rx, cur_tx; /* The next free ring entry */
311 unsigned int dirty_rx, dirty_tx;/* The ring entries to be free()ed. */
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 netdev_tx_t 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;
422 pr_debug("%s", version);
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) {
439 pr_debug("%s", version);
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 pr_warning("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 pr_debug("ISAPNP reports %s at i/o 0x%x, irq %d\n",
534 (char*) corkscrew_isapnp_adapters[i].driver_data, ioaddr, irq);
535 pr_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 pr_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++);
566 static const struct net_device_ops netdev_ops = {
567 .ndo_open = corkscrew_open,
568 .ndo_stop = corkscrew_close,
569 .ndo_start_xmit = corkscrew_start_xmit,
570 .ndo_tx_timeout = corkscrew_timeout,
571 .ndo_get_stats = corkscrew_get_stats,
572 .ndo_set_multicast_list = set_rx_mode,
573 .ndo_change_mtu = eth_change_mtu,
574 .ndo_set_mac_address = eth_mac_addr,
575 .ndo_validate_addr = eth_validate_addr,
579 static int corkscrew_setup(struct net_device *dev, int ioaddr,
580 struct pnp_dev *idev, int card_number)
582 struct corkscrew_private *vp = netdev_priv(dev);
583 unsigned int eeprom[0x40], checksum = 0; /* EEPROM contents */
589 irq = pnp_irq(idev, 0);
590 vp->dev = &idev->dev;
592 irq = inw(ioaddr + 0x2002) & 15;
595 irq = inw(ioaddr + 0x2002) & 15;
598 dev->base_addr = ioaddr;
600 dev->dma = inw(ioaddr + 0x2000) & 7;
601 vp->product_name = "3c515";
602 vp->options = dev->mem_start;
606 if (card_number >= MAX_UNITS)
609 vp->options = options[card_number];
612 if (vp->options >= 0) {
613 vp->media_override = vp->options & 7;
614 if (vp->media_override == 2)
615 vp->media_override = 0;
616 vp->full_duplex = (vp->options & 8) ? 1 : 0;
617 vp->bus_master = (vp->options & 16) ? 1 : 0;
619 vp->media_override = 7;
624 list_add(&vp->list, &root_corkscrew_dev);
627 pr_info("%s: 3Com %s at %#3x,", dev->name, vp->product_name, ioaddr);
629 spin_lock_init(&vp->lock);
631 /* Read the station address from the EEPROM. */
633 for (i = 0; i < 0x18; i++) {
634 __be16 *phys_addr = (__be16 *) dev->dev_addr;
636 outw(EEPROM_Read + i, ioaddr + Wn0EepromCmd);
637 /* Pause for at least 162 us. for the read to take place. */
638 for (timer = 4; timer >= 0; timer--) {
640 if ((inw(ioaddr + Wn0EepromCmd) & 0x0200) == 0)
643 eeprom[i] = inw(ioaddr + Wn0EepromData);
644 checksum ^= eeprom[i];
646 phys_addr[i] = htons(eeprom[i]);
648 checksum = (checksum ^ (checksum >> 8)) & 0xff;
649 if (checksum != 0x00)
650 pr_cont(" ***INVALID CHECKSUM %4.4x*** ", checksum);
651 pr_cont(" %pM", dev->dev_addr);
652 if (eeprom[16] == 0x11c7) { /* Corkscrew */
653 if (request_dma(dev->dma, "3c515")) {
654 pr_cont(", DMA %d allocation failed", dev->dma);
657 pr_cont(", DMA %d", dev->dma);
659 pr_cont(", IRQ %d\n", dev->irq);
660 /* Tell them about an invalid IRQ. */
661 if (corkscrew_debug && (dev->irq <= 0 || dev->irq > 15))
662 pr_warning(" *** Warning: this IRQ is unlikely to work! ***\n");
665 char *ram_split[] = { "5:3", "3:1", "1:1", "3:5" };
668 vp->available_media = inw(ioaddr + Wn3_Options);
669 config = inl(ioaddr + Wn3_Config);
670 if (corkscrew_debug > 1)
671 pr_info(" Internal config register is %4.4x, transceivers %#x.\n",
672 config, inw(ioaddr + Wn3_Options));
673 pr_info(" %dK %s-wide RAM %s Rx:Tx split, %s%s interface.\n",
674 8 << config & Ram_size,
675 config & Ram_width ? "word" : "byte",
676 ram_split[(config & Ram_split) >> Ram_split_shift],
677 config & Autoselect ? "autoselect/" : "",
678 media_tbl[(config & Xcvr) >> Xcvr_shift].name);
679 vp->default_media = (config & Xcvr) >> Xcvr_shift;
680 vp->autoselect = config & Autoselect ? 1 : 0;
681 dev->if_port = vp->default_media;
683 if (vp->media_override != 7) {
684 pr_info(" Media override to transceiver type %d (%s).\n",
686 media_tbl[vp->media_override].name);
687 dev->if_port = vp->media_override;
690 vp->capabilities = eeprom[16];
691 vp->full_bus_master_tx = (vp->capabilities & 0x20) ? 1 : 0;
692 /* Rx is broken at 10mbps, so we always disable it. */
693 /* vp->full_bus_master_rx = 0; */
694 vp->full_bus_master_rx = (vp->capabilities & 0x20) ? 1 : 0;
696 /* The 3c51x-specific entries in the device structure. */
697 dev->netdev_ops = &netdev_ops;
698 dev->watchdog_timeo = (400 * HZ) / 1000;
699 dev->ethtool_ops = &netdev_ethtool_ops;
701 return register_netdev(dev);
705 static int corkscrew_open(struct net_device *dev)
707 int ioaddr = dev->base_addr;
708 struct corkscrew_private *vp = netdev_priv(dev);
712 /* Before initializing select the active media port. */
715 outb(0x20, ioaddr + Wn3_MAC_Ctrl); /* Set the full-duplex bit. */
716 config = inl(ioaddr + Wn3_Config);
718 if (vp->media_override != 7) {
719 if (corkscrew_debug > 1)
720 pr_info("%s: Media override to transceiver %d (%s).\n",
721 dev->name, vp->media_override,
722 media_tbl[vp->media_override].name);
723 dev->if_port = vp->media_override;
724 } else if (vp->autoselect) {
725 /* Find first available media type, starting with 100baseTx. */
727 while (!(vp->available_media & media_tbl[dev->if_port].mask))
728 dev->if_port = media_tbl[dev->if_port].next;
730 if (corkscrew_debug > 1)
731 pr_debug("%s: Initial media type %s.\n",
732 dev->name, media_tbl[dev->if_port].name);
734 init_timer(&vp->timer);
735 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
736 vp->timer.data = (unsigned long) dev;
737 vp->timer.function = &corkscrew_timer; /* timer handler */
738 add_timer(&vp->timer);
740 dev->if_port = vp->default_media;
742 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
743 outl(config, ioaddr + Wn3_Config);
745 if (corkscrew_debug > 1) {
746 pr_debug("%s: corkscrew_open() InternalConfig %8.8x.\n",
750 outw(TxReset, ioaddr + EL3_CMD);
751 for (i = 20; i >= 0; i--)
752 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
755 outw(RxReset, ioaddr + EL3_CMD);
756 /* Wait a few ticks for the RxReset command to complete. */
757 for (i = 20; i >= 0; i--)
758 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
761 outw(SetStatusEnb | 0x00, ioaddr + EL3_CMD);
763 /* Use the now-standard shared IRQ implementation. */
764 if (vp->capabilities == 0x11c7) {
765 /* Corkscrew: Cannot share ISA resources. */
768 request_irq(dev->irq, corkscrew_interrupt, 0,
769 vp->product_name, dev))
771 enable_dma(dev->dma);
772 set_dma_mode(dev->dma, DMA_MODE_CASCADE);
773 } else if (request_irq(dev->irq, corkscrew_interrupt, IRQF_SHARED,
774 vp->product_name, dev)) {
778 if (corkscrew_debug > 1) {
780 pr_debug("%s: corkscrew_open() irq %d media status %4.4x.\n",
781 dev->name, dev->irq, inw(ioaddr + Wn4_Media));
784 /* Set the station address and mask in window 2 each time opened. */
786 for (i = 0; i < 6; i++)
787 outb(dev->dev_addr[i], ioaddr + i);
788 for (; i < 12; i += 2)
791 if (dev->if_port == 3)
792 /* Start the thinnet transceiver. We should really wait 50ms... */
793 outw(StartCoax, ioaddr + EL3_CMD);
795 outw((inw(ioaddr + Wn4_Media) & ~(Media_10TP | Media_SQE)) |
796 media_tbl[dev->if_port].media_bits, ioaddr + Wn4_Media);
798 /* Switch to the stats window, and clear all stats by reading. */
799 outw(StatsDisable, ioaddr + EL3_CMD);
801 for (i = 0; i < 10; i++)
805 /* New: On the Vortex we must also clear the BadSSD counter. */
808 /* ..and on the Boomerang we enable the extra statistics bits. */
809 outw(0x0040, ioaddr + Wn4_NetDiag);
811 /* Switch to register set 7 for normal use. */
814 if (vp->full_bus_master_rx) { /* Boomerang bus master. */
815 vp->cur_rx = vp->dirty_rx = 0;
816 if (corkscrew_debug > 2)
817 pr_debug("%s: Filling in the Rx ring.\n", dev->name);
818 for (i = 0; i < RX_RING_SIZE; i++) {
820 if (i < (RX_RING_SIZE - 1))
821 vp->rx_ring[i].next =
822 isa_virt_to_bus(&vp->rx_ring[i + 1]);
824 vp->rx_ring[i].next = 0;
825 vp->rx_ring[i].status = 0; /* Clear complete bit. */
826 vp->rx_ring[i].length = PKT_BUF_SZ | 0x80000000;
827 skb = dev_alloc_skb(PKT_BUF_SZ);
828 vp->rx_skbuff[i] = skb;
830 break; /* Bad news! */
831 skb->dev = dev; /* Mark as being used by this device. */
832 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
833 vp->rx_ring[i].addr = isa_virt_to_bus(skb->data);
836 vp->rx_ring[i - 1].next =
837 isa_virt_to_bus(&vp->rx_ring[0]); /* Wrap the ring. */
838 outl(isa_virt_to_bus(&vp->rx_ring[0]), ioaddr + UpListPtr);
840 if (vp->full_bus_master_tx) { /* Boomerang bus master Tx. */
841 vp->cur_tx = vp->dirty_tx = 0;
842 outb(PKT_BUF_SZ >> 8, ioaddr + TxFreeThreshold); /* Room for a packet. */
843 /* Clear the Tx ring. */
844 for (i = 0; i < TX_RING_SIZE; i++)
845 vp->tx_skbuff[i] = NULL;
846 outl(0, ioaddr + DownListPtr);
848 /* Set receiver mode: presumably accept b-case and phys addr only. */
850 outw(StatsEnable, ioaddr + EL3_CMD); /* Turn on statistics. */
852 netif_start_queue(dev);
854 outw(RxEnable, ioaddr + EL3_CMD); /* Enable the receiver. */
855 outw(TxEnable, ioaddr + EL3_CMD); /* Enable transmitter. */
856 /* Allow status bits to be seen. */
857 outw(SetStatusEnb | AdapterFailure | IntReq | StatsFull |
858 (vp->full_bus_master_tx ? DownComplete : TxAvailable) |
859 (vp->full_bus_master_rx ? UpComplete : RxComplete) |
860 (vp->bus_master ? DMADone : 0), ioaddr + EL3_CMD);
861 /* Ack all pending events, and set active indicator mask. */
862 outw(AckIntr | IntLatch | TxAvailable | RxEarly | IntReq,
864 outw(SetIntrEnb | IntLatch | TxAvailable | RxComplete | StatsFull
865 | (vp->bus_master ? DMADone : 0) | UpComplete | DownComplete,
871 static void corkscrew_timer(unsigned long data)
874 struct net_device *dev = (struct net_device *) data;
875 struct corkscrew_private *vp = netdev_priv(dev);
876 int ioaddr = dev->base_addr;
880 if (corkscrew_debug > 1)
881 pr_debug("%s: Media selection timer tick happened, %s.\n",
882 dev->name, media_tbl[dev->if_port].name);
884 spin_lock_irqsave(&vp->lock, flags);
887 int old_window = inw(ioaddr + EL3_CMD) >> 13;
890 media_status = inw(ioaddr + Wn4_Media);
891 switch (dev->if_port) {
894 case 5: /* 10baseT, 100baseTX, 100baseFX */
895 if (media_status & Media_LnkBeat) {
897 if (corkscrew_debug > 1)
898 pr_debug("%s: Media %s has link beat, %x.\n",
900 media_tbl[dev->if_port].name,
902 } else if (corkscrew_debug > 1)
903 pr_debug("%s: Media %s is has no link beat, %x.\n",
905 media_tbl[dev->if_port].name,
909 default: /* Other media types handled by Tx timeouts. */
910 if (corkscrew_debug > 1)
911 pr_debug("%s: Media %s is has no indication, %x.\n",
913 media_tbl[dev->if_port].name,
922 media_tbl[dev->if_port].next;
924 while (!(vp->available_media & media_tbl[dev->if_port].mask));
926 if (dev->if_port == 8) { /* Go back to default. */
927 dev->if_port = vp->default_media;
928 if (corkscrew_debug > 1)
929 pr_debug("%s: Media selection failing, using default %s port.\n",
931 media_tbl[dev->if_port].name);
933 if (corkscrew_debug > 1)
934 pr_debug("%s: Media selection failed, now trying %s port.\n",
936 media_tbl[dev->if_port].name);
937 vp->timer.expires = jiffies + media_tbl[dev->if_port].wait;
938 add_timer(&vp->timer);
940 outw((media_status & ~(Media_10TP | Media_SQE)) |
941 media_tbl[dev->if_port].media_bits,
945 config = inl(ioaddr + Wn3_Config);
946 config = (config & ~Xcvr) | (dev->if_port << Xcvr_shift);
947 outl(config, ioaddr + Wn3_Config);
949 outw(dev->if_port == 3 ? StartCoax : StopCoax,
952 EL3WINDOW(old_window);
955 spin_unlock_irqrestore(&vp->lock, flags);
956 if (corkscrew_debug > 1)
957 pr_debug("%s: Media selection timer finished, %s.\n",
958 dev->name, media_tbl[dev->if_port].name);
960 #endif /* AUTOMEDIA */
963 static void corkscrew_timeout(struct net_device *dev)
966 struct corkscrew_private *vp = netdev_priv(dev);
967 int ioaddr = dev->base_addr;
969 pr_warning("%s: transmit timed out, tx_status %2.2x status %4.4x.\n",
970 dev->name, inb(ioaddr + TxStatus),
971 inw(ioaddr + EL3_STATUS));
972 /* Slight code bloat to be user friendly. */
973 if ((inb(ioaddr + TxStatus) & 0x88) == 0x88)
974 pr_warning("%s: Transmitter encountered 16 collisions --"
975 " network cable problem?\n", dev->name);
976 #ifndef final_version
977 pr_debug(" Flags; bus-master %d, full %d; dirty %d current %d.\n",
978 vp->full_bus_master_tx, vp->tx_full, vp->dirty_tx,
980 pr_debug(" Down list %8.8x vs. %p.\n", inl(ioaddr + DownListPtr),
982 for (i = 0; i < TX_RING_SIZE; i++) {
983 pr_debug(" %d: %p length %8.8x status %8.8x\n", i,
985 vp->tx_ring[i].length, vp->tx_ring[i].status);
988 /* Issue TX_RESET and TX_START commands. */
989 outw(TxReset, ioaddr + EL3_CMD);
990 for (i = 20; i >= 0; i--)
991 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
993 outw(TxEnable, ioaddr + EL3_CMD);
994 dev->trans_start = jiffies; /* prevent tx timeout */
995 dev->stats.tx_errors++;
996 dev->stats.tx_dropped++;
997 netif_wake_queue(dev);
1000 static netdev_tx_t corkscrew_start_xmit(struct sk_buff *skb,
1001 struct net_device *dev)
1003 struct corkscrew_private *vp = netdev_priv(dev);
1004 int ioaddr = dev->base_addr;
1006 /* Block a timer-based transmit from overlapping. */
1008 netif_stop_queue(dev);
1010 if (vp->full_bus_master_tx) { /* BOOMERANG bus-master */
1011 /* Calculate the next Tx descriptor entry. */
1012 int entry = vp->cur_tx % TX_RING_SIZE;
1013 struct boom_tx_desc *prev_entry;
1014 unsigned long flags;
1017 if (vp->tx_full) /* No room to transmit with */
1018 return NETDEV_TX_BUSY;
1019 if (vp->cur_tx != 0)
1020 prev_entry = &vp->tx_ring[(vp->cur_tx - 1) % TX_RING_SIZE];
1023 if (corkscrew_debug > 3)
1024 pr_debug("%s: Trying to send a packet, Tx index %d.\n",
1025 dev->name, vp->cur_tx);
1026 /* vp->tx_full = 1; */
1027 vp->tx_skbuff[entry] = skb;
1028 vp->tx_ring[entry].next = 0;
1029 vp->tx_ring[entry].addr = isa_virt_to_bus(skb->data);
1030 vp->tx_ring[entry].length = skb->len | 0x80000000;
1031 vp->tx_ring[entry].status = skb->len | 0x80000000;
1033 spin_lock_irqsave(&vp->lock, flags);
1034 outw(DownStall, ioaddr + EL3_CMD);
1035 /* Wait for the stall to complete. */
1036 for (i = 20; i >= 0; i--)
1037 if ((inw(ioaddr + EL3_STATUS) & CmdInProgress) == 0)
1040 prev_entry->next = isa_virt_to_bus(&vp->tx_ring[entry]);
1041 if (inl(ioaddr + DownListPtr) == 0) {
1042 outl(isa_virt_to_bus(&vp->tx_ring[entry]),
1043 ioaddr + DownListPtr);
1046 outw(DownUnstall, ioaddr + EL3_CMD);
1047 spin_unlock_irqrestore(&vp->lock, flags);
1050 if (vp->cur_tx - vp->dirty_tx > TX_RING_SIZE - 1)
1052 else { /* Clear previous interrupt enable. */
1054 prev_entry->status &= ~0x80000000;
1055 netif_wake_queue(dev);
1057 return NETDEV_TX_OK;
1059 /* Put out the doubleword header... */
1060 outl(skb->len, ioaddr + TX_FIFO);
1061 dev->stats.tx_bytes += skb->len;
1062 #ifdef VORTEX_BUS_MASTER
1063 if (vp->bus_master) {
1064 /* Set the bus-master controller to transfer the packet. */
1065 outl((int) (skb->data), ioaddr + Wn7_MasterAddr);
1066 outw((skb->len + 3) & ~3, ioaddr + Wn7_MasterLen);
1068 outw(StartDMADown, ioaddr + EL3_CMD);
1069 /* queue will be woken at the DMADone interrupt. */
1071 /* ... and the packet rounded to a doubleword. */
1072 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1074 if (inw(ioaddr + TxFree) > 1536) {
1075 netif_wake_queue(dev);
1077 /* Interrupt us when the FIFO has room for max-sized packet. */
1078 outw(SetTxThreshold + (1536 >> 2),
1082 /* ... and the packet rounded to a doubleword. */
1083 outsl(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
1085 if (inw(ioaddr + TxFree) > 1536) {
1086 netif_wake_queue(dev);
1088 /* Interrupt us when the FIFO has room for max-sized packet. */
1089 outw(SetTxThreshold + (1536 >> 2), ioaddr + EL3_CMD);
1090 #endif /* bus master */
1093 /* Clear the Tx status stack. */
1098 while (--i > 0 && (tx_status = inb(ioaddr + TxStatus)) > 0) {
1099 if (tx_status & 0x3C) { /* A Tx-disabling error occurred. */
1100 if (corkscrew_debug > 2)
1101 pr_debug("%s: Tx error, status %2.2x.\n",
1102 dev->name, tx_status);
1103 if (tx_status & 0x04)
1104 dev->stats.tx_fifo_errors++;
1105 if (tx_status & 0x38)
1106 dev->stats.tx_aborted_errors++;
1107 if (tx_status & 0x30) {
1109 outw(TxReset, ioaddr + EL3_CMD);
1110 for (j = 20; j >= 0; j--)
1111 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1114 outw(TxEnable, ioaddr + EL3_CMD);
1116 outb(0x00, ioaddr + TxStatus); /* Pop the status stack. */
1119 return NETDEV_TX_OK;
1122 /* The interrupt handler does all of the Rx thread work and cleans up
1123 after the Tx thread. */
1125 static irqreturn_t corkscrew_interrupt(int irq, void *dev_id)
1127 /* Use the now-standard shared IRQ implementation. */
1128 struct net_device *dev = dev_id;
1129 struct corkscrew_private *lp = netdev_priv(dev);
1132 int i = max_interrupt_work;
1134 ioaddr = dev->base_addr;
1135 latency = inb(ioaddr + Timer);
1137 spin_lock(&lp->lock);
1139 status = inw(ioaddr + EL3_STATUS);
1141 if (corkscrew_debug > 4)
1142 pr_debug("%s: interrupt, status %4.4x, timer %d.\n",
1143 dev->name, status, latency);
1144 if ((status & 0xE000) != 0xE000) {
1145 static int donedidthis;
1146 /* Some interrupt controllers store a bogus interrupt from boot-time.
1147 Ignore a single early interrupt, but don't hang the machine for
1148 other interrupt problems. */
1149 if (donedidthis++ > 100) {
1150 pr_err("%s: Bogus interrupt, bailing. Status %4.4x, start=%d.\n",
1151 dev->name, status, netif_running(dev));
1152 free_irq(dev->irq, dev);
1158 if (corkscrew_debug > 5)
1159 pr_debug("%s: In interrupt loop, status %4.4x.\n",
1161 if (status & RxComplete)
1164 if (status & TxAvailable) {
1165 if (corkscrew_debug > 5)
1166 pr_debug(" TX room bit was handled.\n");
1167 /* There's room in the FIFO for a full-sized packet. */
1168 outw(AckIntr | TxAvailable, ioaddr + EL3_CMD);
1169 netif_wake_queue(dev);
1171 if (status & DownComplete) {
1172 unsigned int dirty_tx = lp->dirty_tx;
1174 while (lp->cur_tx - dirty_tx > 0) {
1175 int entry = dirty_tx % TX_RING_SIZE;
1176 if (inl(ioaddr + DownListPtr) == isa_virt_to_bus(&lp->tx_ring[entry]))
1177 break; /* It still hasn't been processed. */
1178 if (lp->tx_skbuff[entry]) {
1179 dev_kfree_skb_irq(lp->tx_skbuff[entry]);
1180 lp->tx_skbuff[entry] = NULL;
1184 lp->dirty_tx = dirty_tx;
1185 outw(AckIntr | DownComplete, ioaddr + EL3_CMD);
1186 if (lp->tx_full && (lp->cur_tx - dirty_tx <= TX_RING_SIZE - 1)) {
1188 netif_wake_queue(dev);
1191 #ifdef VORTEX_BUS_MASTER
1192 if (status & DMADone) {
1193 outw(0x1000, ioaddr + Wn7_MasterStatus); /* Ack the event. */
1194 dev_kfree_skb_irq(lp->tx_skb); /* Release the transferred buffer */
1195 netif_wake_queue(dev);
1198 if (status & UpComplete) {
1200 outw(AckIntr | UpComplete, ioaddr + EL3_CMD);
1202 if (status & (AdapterFailure | RxEarly | StatsFull)) {
1203 /* Handle all uncommon interrupts at once. */
1204 if (status & RxEarly) { /* Rx early is unused. */
1206 outw(AckIntr | RxEarly, ioaddr + EL3_CMD);
1208 if (status & StatsFull) { /* Empty statistics. */
1209 static int DoneDidThat;
1210 if (corkscrew_debug > 4)
1211 pr_debug("%s: Updating stats.\n", dev->name);
1212 update_stats(ioaddr, dev);
1213 /* DEBUG HACK: Disable statistics as an interrupt source. */
1214 /* This occurs when we have the wrong media type! */
1215 if (DoneDidThat == 0 && inw(ioaddr + EL3_STATUS) & StatsFull) {
1217 pr_notice("%s: Updating stats failed, disabling stats as an interrupt source.\n",
1219 for (win = 0; win < 8; win++) {
1221 pr_notice("Vortex window %d:", win);
1222 for (reg = 0; reg < 16; reg++)
1223 pr_cont(" %2.2x", inb(ioaddr + reg));
1227 outw(SetIntrEnb | TxAvailable |
1228 RxComplete | AdapterFailure |
1229 UpComplete | DownComplete |
1230 TxComplete, ioaddr + EL3_CMD);
1234 if (status & AdapterFailure) {
1235 /* Adapter failure requires Rx reset and reinit. */
1236 outw(RxReset, ioaddr + EL3_CMD);
1237 /* Set the Rx filter to the current state. */
1239 outw(RxEnable, ioaddr + EL3_CMD); /* Re-enable the receiver. */
1240 outw(AckIntr | AdapterFailure,
1246 pr_err("%s: Too much work in interrupt, status %4.4x. Disabling functions (%4.4x).\n",
1247 dev->name, status, SetStatusEnb | ((~status) & 0x7FE));
1248 /* Disable all pending interrupts. */
1249 outw(SetStatusEnb | ((~status) & 0x7FE), ioaddr + EL3_CMD);
1250 outw(AckIntr | 0x7FF, ioaddr + EL3_CMD);
1253 /* Acknowledge the IRQ. */
1254 outw(AckIntr | IntReq | IntLatch, ioaddr + EL3_CMD);
1256 } while ((status = inw(ioaddr + EL3_STATUS)) & (IntLatch | RxComplete));
1258 spin_unlock(&lp->lock);
1260 if (corkscrew_debug > 4)
1261 pr_debug("%s: exiting interrupt, status %4.4x.\n", dev->name, status);
1265 static int corkscrew_rx(struct net_device *dev)
1267 int ioaddr = dev->base_addr;
1271 if (corkscrew_debug > 5)
1272 pr_debug(" In rx_packet(), status %4.4x, rx_status %4.4x.\n",
1273 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1274 while ((rx_status = inw(ioaddr + RxStatus)) > 0) {
1275 if (rx_status & 0x4000) { /* Error, update stats. */
1276 unsigned char rx_error = inb(ioaddr + RxErrors);
1277 if (corkscrew_debug > 2)
1278 pr_debug(" Rx error: status %2.2x.\n",
1280 dev->stats.rx_errors++;
1281 if (rx_error & 0x01)
1282 dev->stats.rx_over_errors++;
1283 if (rx_error & 0x02)
1284 dev->stats.rx_length_errors++;
1285 if (rx_error & 0x04)
1286 dev->stats.rx_frame_errors++;
1287 if (rx_error & 0x08)
1288 dev->stats.rx_crc_errors++;
1289 if (rx_error & 0x10)
1290 dev->stats.rx_length_errors++;
1292 /* The packet length: up to 4.5K!. */
1293 short pkt_len = rx_status & 0x1fff;
1294 struct sk_buff *skb;
1296 skb = dev_alloc_skb(pkt_len + 5 + 2);
1297 if (corkscrew_debug > 4)
1298 pr_debug("Receiving packet size %d status %4.4x.\n",
1299 pkt_len, rx_status);
1301 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1302 /* 'skb_put()' points to the start of sk_buff data area. */
1303 insl(ioaddr + RX_FIFO,
1304 skb_put(skb, pkt_len),
1305 (pkt_len + 3) >> 2);
1306 outw(RxDiscard, ioaddr + EL3_CMD); /* Pop top Rx packet. */
1307 skb->protocol = eth_type_trans(skb, dev);
1309 dev->stats.rx_packets++;
1310 dev->stats.rx_bytes += pkt_len;
1311 /* Wait a limited time to go to next packet. */
1312 for (i = 200; i >= 0; i--)
1313 if (! (inw(ioaddr + EL3_STATUS) & CmdInProgress))
1316 } else if (corkscrew_debug)
1317 pr_debug("%s: Couldn't allocate a sk_buff of size %d.\n", dev->name, pkt_len);
1319 outw(RxDiscard, ioaddr + EL3_CMD);
1320 dev->stats.rx_dropped++;
1321 /* Wait a limited time to skip this packet. */
1322 for (i = 200; i >= 0; i--)
1323 if (!(inw(ioaddr + EL3_STATUS) & CmdInProgress))
1329 static int boomerang_rx(struct net_device *dev)
1331 struct corkscrew_private *vp = netdev_priv(dev);
1332 int entry = vp->cur_rx % RX_RING_SIZE;
1333 int ioaddr = dev->base_addr;
1336 if (corkscrew_debug > 5)
1337 pr_debug(" In boomerang_rx(), status %4.4x, rx_status %4.4x.\n",
1338 inw(ioaddr + EL3_STATUS), inw(ioaddr + RxStatus));
1339 while ((rx_status = vp->rx_ring[entry].status) & RxDComplete) {
1340 if (rx_status & RxDError) { /* Error, update stats. */
1341 unsigned char rx_error = rx_status >> 16;
1342 if (corkscrew_debug > 2)
1343 pr_debug(" Rx error: status %2.2x.\n",
1345 dev->stats.rx_errors++;
1346 if (rx_error & 0x01)
1347 dev->stats.rx_over_errors++;
1348 if (rx_error & 0x02)
1349 dev->stats.rx_length_errors++;
1350 if (rx_error & 0x04)
1351 dev->stats.rx_frame_errors++;
1352 if (rx_error & 0x08)
1353 dev->stats.rx_crc_errors++;
1354 if (rx_error & 0x10)
1355 dev->stats.rx_length_errors++;
1357 /* The packet length: up to 4.5K!. */
1358 short pkt_len = rx_status & 0x1fff;
1359 struct sk_buff *skb;
1361 dev->stats.rx_bytes += pkt_len;
1362 if (corkscrew_debug > 4)
1363 pr_debug("Receiving packet size %d status %4.4x.\n",
1364 pkt_len, rx_status);
1366 /* Check if the packet is long enough to just accept without
1367 copying to a properly sized skbuff. */
1368 if (pkt_len < rx_copybreak &&
1369 (skb = dev_alloc_skb(pkt_len + 4)) != NULL) {
1370 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1371 /* 'skb_put()' points to the start of sk_buff data area. */
1372 memcpy(skb_put(skb, pkt_len),
1373 isa_bus_to_virt(vp->rx_ring[entry].
1378 /* Pass up the skbuff already on the Rx ring. */
1379 skb = vp->rx_skbuff[entry];
1380 vp->rx_skbuff[entry] = NULL;
1381 temp = skb_put(skb, pkt_len);
1382 /* Remove this checking code for final release. */
1383 if (isa_bus_to_virt(vp->rx_ring[entry].addr) != temp)
1384 pr_warning("%s: Warning -- the skbuff addresses do not match"
1385 " in boomerang_rx: %p vs. %p / %p.\n",
1387 isa_bus_to_virt(vp->
1393 skb->protocol = eth_type_trans(skb, dev);
1395 dev->stats.rx_packets++;
1397 entry = (++vp->cur_rx) % RX_RING_SIZE;
1399 /* Refill the Rx ring buffers. */
1400 for (; vp->cur_rx - vp->dirty_rx > 0; vp->dirty_rx++) {
1401 struct sk_buff *skb;
1402 entry = vp->dirty_rx % RX_RING_SIZE;
1403 if (vp->rx_skbuff[entry] == NULL) {
1404 skb = dev_alloc_skb(PKT_BUF_SZ);
1406 break; /* Bad news! */
1407 skb->dev = dev; /* Mark as being used by this device. */
1408 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1409 vp->rx_ring[entry].addr = isa_virt_to_bus(skb->data);
1410 vp->rx_skbuff[entry] = skb;
1412 vp->rx_ring[entry].status = 0; /* Clear complete bit. */
1417 static int corkscrew_close(struct net_device *dev)
1419 struct corkscrew_private *vp = netdev_priv(dev);
1420 int ioaddr = dev->base_addr;
1423 netif_stop_queue(dev);
1425 if (corkscrew_debug > 1) {
1426 pr_debug("%s: corkscrew_close() status %4.4x, Tx status %2.2x.\n",
1427 dev->name, inw(ioaddr + EL3_STATUS),
1428 inb(ioaddr + TxStatus));
1429 pr_debug("%s: corkscrew close stats: rx_nocopy %d rx_copy %d tx_queued %d.\n",
1430 dev->name, rx_nocopy, rx_copy, queued_packet);
1433 del_timer(&vp->timer);
1435 /* Turn off statistics ASAP. We update lp->stats below. */
1436 outw(StatsDisable, ioaddr + EL3_CMD);
1438 /* Disable the receiver and transmitter. */
1439 outw(RxDisable, ioaddr + EL3_CMD);
1440 outw(TxDisable, ioaddr + EL3_CMD);
1442 if (dev->if_port == XCVR_10base2)
1443 /* Turn off thinnet power. Green! */
1444 outw(StopCoax, ioaddr + EL3_CMD);
1446 free_irq(dev->irq, dev);
1448 outw(SetIntrEnb | 0x0000, ioaddr + EL3_CMD);
1450 update_stats(ioaddr, dev);
1451 if (vp->full_bus_master_rx) { /* Free Boomerang bus master Rx buffers. */
1452 outl(0, ioaddr + UpListPtr);
1453 for (i = 0; i < RX_RING_SIZE; i++)
1454 if (vp->rx_skbuff[i]) {
1455 dev_kfree_skb(vp->rx_skbuff[i]);
1456 vp->rx_skbuff[i] = NULL;
1459 if (vp->full_bus_master_tx) { /* Free Boomerang bus master Tx buffers. */
1460 outl(0, ioaddr + DownListPtr);
1461 for (i = 0; i < TX_RING_SIZE; i++)
1462 if (vp->tx_skbuff[i]) {
1463 dev_kfree_skb(vp->tx_skbuff[i]);
1464 vp->tx_skbuff[i] = NULL;
1471 static struct net_device_stats *corkscrew_get_stats(struct net_device *dev)
1473 struct corkscrew_private *vp = netdev_priv(dev);
1474 unsigned long flags;
1476 if (netif_running(dev)) {
1477 spin_lock_irqsave(&vp->lock, flags);
1478 update_stats(dev->base_addr, dev);
1479 spin_unlock_irqrestore(&vp->lock, flags);
1484 /* Update statistics.
1485 Unlike with the EL3 we need not worry about interrupts changing
1486 the window setting from underneath us, but we must still guard
1487 against a race condition with a StatsUpdate interrupt updating the
1488 table. This is done by checking that the ASM (!) code generated uses
1489 atomic updates with '+='.
1491 static void update_stats(int ioaddr, struct net_device *dev)
1493 /* Unlike the 3c5x9 we need not turn off stats updates while reading. */
1494 /* Switch to the stats window, and read everything. */
1496 dev->stats.tx_carrier_errors += inb(ioaddr + 0);
1497 dev->stats.tx_heartbeat_errors += inb(ioaddr + 1);
1498 /* Multiple collisions. */ inb(ioaddr + 2);
1499 dev->stats.collisions += inb(ioaddr + 3);
1500 dev->stats.tx_window_errors += inb(ioaddr + 4);
1501 dev->stats.rx_fifo_errors += inb(ioaddr + 5);
1502 dev->stats.tx_packets += inb(ioaddr + 6);
1503 dev->stats.tx_packets += (inb(ioaddr + 9) & 0x30) << 4;
1504 /* Rx packets */ inb(ioaddr + 7);
1505 /* Must read to clear */
1506 /* Tx deferrals */ inb(ioaddr + 8);
1507 /* Don't bother with register 9, an extension of registers 6&7.
1508 If we do use the 6&7 values the atomic update assumption above
1510 inw(ioaddr + 10); /* Total Rx and Tx octets. */
1512 /* New: On the Vortex we must also clear the BadSSD counter. */
1516 /* We change back to window 7 (not 1) with the Vortex. */
1520 /* This new version of set_rx_mode() supports v1.4 kernels.
1521 The Vortex chip has no documented multicast filter, so the only
1522 multicast setting is to receive all multicast frames. At least
1523 the chip has a very clean way to set the mode, unlike many others. */
1524 static void set_rx_mode(struct net_device *dev)
1526 int ioaddr = dev->base_addr;
1529 if (dev->flags & IFF_PROMISC) {
1530 if (corkscrew_debug > 3)
1531 pr_debug("%s: Setting promiscuous mode.\n",
1533 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
1534 } else if (!netdev_mc_empty(dev) || dev->flags & IFF_ALLMULTI) {
1535 new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
1537 new_mode = SetRxFilter | RxStation | RxBroadcast;
1539 outw(new_mode, ioaddr + EL3_CMD);
1542 static void netdev_get_drvinfo(struct net_device *dev,
1543 struct ethtool_drvinfo *info)
1545 strcpy(info->driver, DRV_NAME);
1546 strcpy(info->version, DRV_VERSION);
1547 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
1550 static u32 netdev_get_msglevel(struct net_device *dev)
1552 return corkscrew_debug;
1555 static void netdev_set_msglevel(struct net_device *dev, u32 level)
1557 corkscrew_debug = level;
1560 static const struct ethtool_ops netdev_ethtool_ops = {
1561 .get_drvinfo = netdev_get_drvinfo,
1562 .get_msglevel = netdev_get_msglevel,
1563 .set_msglevel = netdev_set_msglevel,
1568 void cleanup_module(void)
1570 while (!list_empty(&root_corkscrew_dev)) {
1571 struct net_device *dev;
1572 struct corkscrew_private *vp;
1574 vp = list_entry(root_corkscrew_dev.next,
1575 struct corkscrew_private, list);
1577 unregister_netdev(dev);