![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to winbond-840.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GnuMach] / Gnu-Mach / linux / src / drivers / net|
Return to winbond-840.c CVS log | Up to [GnuMach] / Gnu-Mach / linux / src / drivers / net |
1.1 root 1: /* winbond-840.c: A Linux network device driver for the Winbond W89c840. */
2: /*
3: Written 1998-2003 by Donald Becker.
4:
5: This software may be used and distributed according to the terms of
6: the GNU General Public License (GPL), incorporated herein by reference.
7: Drivers based on or derived from this code fall under the GPL and must
8: retain the authorship, copyright and license notice. This file is not
9: a complete program and may only be used when the entire operating
10: system is licensed under the GPL.
11:
12: The author may be reached as [email protected], or C/O
13: Scyld Computing Corporation
14: 914 Bay Ridge Road, Suite 220
15: Annapolis MD 21403
16:
17: Support information and updates available at
18: http://www.scyld.com/network/drivers.html
19: The information and support mailing lists are based at
20: http://www.scyld.com/mailman/listinfo/
21:
22: Do not remove the copyright infomation.
23: Do not change the version information unless an improvement has been made.
24: Merely removing my name, as Compex has done in the past, does not count
25: as an improvement.
26: */
27:
28: /* These identify the driver base version and may not be removed. */
29: static const char version1[] =
30: "winbond-840.c:v1.10 7/22/2003 Donald Becker <[email protected]>\n";
31: static const char version2[] =
32: " http://www.scyld.com/network/drivers.html\n";
33:
34: /* Automatically extracted configuration info:
35: probe-func: winbond840_probe
36: config-in: tristate 'Winbond W89c840 Ethernet support' CONFIG_WINBOND_840
37:
38: c-help-name: Winbond W89c840 PCI Ethernet support
39: c-help-symbol: CONFIG_WINBOND_840
40: c-help: The winbond-840.c driver is for the Winbond W89c840 chip.
41: c-help: This chip is named TX9882 on the Compex RL100-ATX board.
42: c-help: More specific information and updates are available from
43: c-help: http://www.scyld.com/network/drivers.html
44: */
45:
46: /* The user-configurable values.
47: These may be modified when a driver module is loaded.*/
48:
49: /* Message enable level: 0..31 = no..all messages. See NETIF_MSG docs. */
50: static int debug = 2;
51:
52: /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
53: static int max_interrupt_work = 20;
54:
55: /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
56: The '840 uses a 64 element hash table based on the Ethernet CRC. */
57: static int multicast_filter_limit = 32;
58:
59: /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
60: Setting to > 1518 effectively disables this feature. */
61: static int rx_copybreak = 0;
62:
63: /* Used to pass the media type, etc.
64: Both 'options[]' and 'full_duplex[]' should exist for driver
65: interoperability, however setting full_duplex[] is deprecated.
66: The media type is usually passed in 'options[]'.
67: The default is autonegotation for speed and duplex.
68: This should rarely be overridden.
69: Use option values 0x10/0x20 for 10Mbps, 0x100,0x200 for 100Mbps.
70: Use option values 0x10 and 0x100 for forcing half duplex fixed speed.
71: Use option values 0x20 and 0x200 for forcing full duplex operation.
72: */
73: #define MAX_UNITS 8 /* More are supported, limit only on options */
74: static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
75: static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
76:
77: /* Operational parameters that are set at compile time. */
78:
79: /* Keep the ring sizes a power of two for compile efficiency.
80: The compiler will convert <unsigned>'%'<2^N> into a bit mask.
81: Making the Tx ring too large decreases the effectiveness of channel
82: bonding and packet priority, confuses the system network buffer limits,
83: and wastes memory.
84: Larger receive rings merely waste memory.
85: */
86: #define TX_RING_SIZE 16
87: #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */
88: #define RX_RING_SIZE 32
89:
90: /* The presumed FIFO size for working around the Tx-FIFO-overflow bug.
91: To avoid overflowing we don't queue again until we have room for a
92: full-size packet.
93: */
94: #define TX_FIFO_SIZE (2048)
95: #define TX_BUG_FIFO_LIMIT (TX_FIFO_SIZE-1514-16)
96:
97: /* Operational parameters that usually are not changed. */
98: /* Time in jiffies before concluding the transmitter is hung.
99: Re-autonegotiation may take up to 3 seconds.
100: */
101: #define TX_TIMEOUT (6*HZ)
102:
103: /* Allocation size of Rx buffers with normal sized Ethernet frames.
104: Do not change this value without good reason. This is not a limit,
105: but a way to keep a consistent allocation size among drivers.
106: */
107: #define PKT_BUF_SZ 1536
108:
109: #ifndef __KERNEL__
110: #define __KERNEL__
111: #endif
112: #if !defined(__OPTIMIZE__)
113: #warning You must compile this file with the correct options!
114: #warning See the last lines of the source file.
115: #error You must compile this driver with "-O".
116: #endif
117:
118: /* Include files, designed to support most kernel versions 2.0.0 and later. */
119: #include <linux/config.h>
120: #if defined(CONFIG_SMP) && ! defined(__SMP__)
121: #define __SMP__
122: #endif
123: #if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
124: #define MODVERSIONS
125: #endif
126:
127: #include <linux/version.h>
128: #if defined(MODVERSIONS)
129: #include <linux/modversions.h>
130: #endif
131: #include <linux/module.h>
132:
133: #include <linux/kernel.h>
134: #include <linux/string.h>
135: #include <linux/timer.h>
136: #include <linux/errno.h>
137: #include <linux/ioport.h>
138: #if LINUX_VERSION_CODE >= 0x20400
139: #include <linux/slab.h>
140: #else
141: #include <linux/malloc.h>
142: #endif
143: #include <linux/interrupt.h>
144: #include <linux/pci.h>
145: #include <linux/netdevice.h>
146: #include <linux/etherdevice.h>
147: #include <linux/skbuff.h>
148: #include <asm/processor.h> /* Processor type for cache alignment. */
149: #include <asm/bitops.h>
150: #include <asm/io.h>
151:
152: #ifdef INLINE_PCISCAN
153: #include "k_compat.h"
154: #else
155: #include "pci-scan.h"
156: #include "kern_compat.h"
157: #endif
158:
159: /* Configure the PCI bus bursts and FIFO thresholds.
160: 486: Set 8 longword cache alignment, 8 longword burst.
161: 586: Set 16 longword cache alignment, no burst limit.
162: Cache alignment bits 15:14 Burst length 13:8
163: 0000 <not allowed> 0000 align to cache 0800 8 longwords
164: 4000 8 longwords 0100 1 longword 1000 16 longwords
165: 8000 16 longwords 0200 2 longwords 2000 32 longwords
166: C000 32 longwords 0400 4 longwords
167: Wait the specified 50 PCI cycles after a reset by initializing
168: Tx and Rx queues and the address filter list. */
169: #define TX_DESC_SIZE 16
170: #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
171: static int csr0 = 0x00100000 | 0xE000 | TX_DESC_SIZE;
172: #elif defined(__alpha__) || defined(__x86_64) || defined(__ia64)
173: static int csr0 = 0xE000 | TX_DESC_SIZE;
174: #elif defined(__i386__)
175: static int csr0 = 0xE000 | TX_DESC_SIZE;
176: #else
177: static int csr0 = 0xE000 | TX_DESC_SIZE;
178: #warning Processor architecture unknown!
179: #endif
180:
181:
182:
183: #if (LINUX_VERSION_CODE >= 0x20100) && defined(MODULE)
184: char kernel_version[] = UTS_RELEASE;
185: #endif
186:
187: MODULE_AUTHOR("Donald Becker <[email protected]>");
188: MODULE_DESCRIPTION("Winbond W89c840 Ethernet driver");
189: MODULE_LICENSE("GPL");
190: MODULE_PARM(max_interrupt_work, "i");
191: MODULE_PARM(debug, "i");
192: MODULE_PARM(rx_copybreak, "i");
193: MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
194: MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
195: MODULE_PARM(multicast_filter_limit, "i");
196: MODULE_PARM_DESC(debug, "Driver message level (0-31)");
197: MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex");
198: MODULE_PARM_DESC(max_interrupt_work,
199: "Driver maximum events handled per interrupt");
200: MODULE_PARM_DESC(full_duplex, "Non-zero to set forced full duplex.");
201: MODULE_PARM_DESC(rx_copybreak,
202: "Breakpoint in bytes for copy-only-tiny-frames");
203: MODULE_PARM_DESC(multicast_filter_limit,
204: "Multicast addresses before switching to Rx-all-multicast");
205:
206: /*
207: Theory of Operation
208:
209: I. Board Compatibility
210:
211: This driver is for the Winbond w89c840 chip.
212:
213: II. Board-specific settings
214:
215: None.
216:
217: III. Driver operation
218:
219: This chip is very similar to the Digital 21*4* "Tulip" family. The first
220: twelve registers and the descriptor format are nearly identical. Read a
221: Tulip manual for operational details.
222:
223: A significant difference is that the multicast filter and station address are
224: stored in registers rather than loaded through a pseudo-transmit packet.
225:
226: Unlike the Tulip, transmit buffers are limited to 1KB. To transmit a
227: full-sized packet we must use both data buffers in a descriptor. Thus the
228: driver uses ring mode where descriptors are implicitly sequential in memory,
229: rather than using the second descriptor address as a chain pointer to
230: subsequent descriptors.
231:
232: IV. Notes
233:
234: If you are going to almost clone a Tulip, why not go all the way and avoid
235: the need for a new driver?
236:
237: IVb. References
238:
239: http://www.scyld.com/expert/100mbps.html
240: http://www.scyld.com/expert/NWay.html
241: http://www.winbond.com.tw/
242:
243: IVc. Errata
244:
245: A horrible bug exists in the transmit FIFO. Apparently the chip doesn't
246: correctly detect a full FIFO, and queuing more than 2048 bytes may result in
247: silent data corruption.
248:
249: */
250:
251:
252:
253: /*
254: PCI probe table.
255: */
256: static void *w840_probe1(struct pci_dev *pdev, void *init_dev,
257: long ioaddr, int irq, int chip_idx, int find_cnt);
258: static int winbond_pwr_event(void *dev_instance, int event);
259: enum chip_capability_flags {
260: CanHaveMII=1, HasBrokenTx=2, AlwaysFDX=4, FDXOnNoMII=8,};
261: #ifdef USE_IO_OPS
262: #define W840_FLAGS (PCI_USES_IO | PCI_ADDR0 | PCI_USES_MASTER)
263: #else
264: #define W840_FLAGS (PCI_USES_MEM | PCI_ADDR1 | PCI_USES_MASTER)
265: #endif
266:
267: static struct pci_id_info pci_id_tbl[] = {
268: {"Winbond W89c840", /* Sometime a Level-One switch card. */
269: { 0x08401050, 0xffffffff, 0x81530000, 0xffff0000 },
270: W840_FLAGS, 128, CanHaveMII | HasBrokenTx | FDXOnNoMII},
271: {"Winbond W89c840", { 0x08401050, 0xffffffff, },
272: W840_FLAGS, 128, CanHaveMII | HasBrokenTx},
273: {"Compex RL100-ATX", { 0x201111F6, 0xffffffff,},
274: W840_FLAGS, 128, CanHaveMII | HasBrokenTx},
275: {0,}, /* 0 terminated list. */
276: };
277:
278: struct drv_id_info winbond840_drv_id = {
279: "winbond-840", PCI_HOTSWAP, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl,
280: w840_probe1, winbond_pwr_event };
281:
282: /* This driver was written to use PCI memory space, however some x86 systems
283: work only with I/O space accesses. Pass -DUSE_IO_OPS to use PCI I/O space
284: accesses instead of memory space. */
285:
286: #ifdef USE_IO_OPS
287: #undef readb
288: #undef readw
289: #undef readl
290: #undef writeb
291: #undef writew
292: #undef writel
293: #define readb inb
294: #define readw inw
295: #define readl inl
296: #define writeb outb
297: #define writew outw
298: #define writel outl
299: #endif
300:
301: /* Offsets to the Command and Status Registers, "CSRs".
302: While similar to the Tulip, these registers are longword aligned.
303: Note: It's not useful to define symbolic names for every register bit in
304: the device. The name can only partially document the semantics and make
305: the driver longer and more difficult to read.
306: */
307: enum w840_offsets {
308: PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08,
309: RxRingPtr=0x0C, TxRingPtr=0x10,
310: IntrStatus=0x14, NetworkConfig=0x18, IntrEnable=0x1C,
311: RxMissed=0x20, EECtrl=0x24, MIICtrl=0x24, BootRom=0x28, GPTimer=0x2C,
312: CurRxDescAddr=0x30, CurRxBufAddr=0x34, /* Debug use */
313: MulticastFilter0=0x38, MulticastFilter1=0x3C, StationAddr=0x40,
314: CurTxDescAddr=0x4C, CurTxBufAddr=0x50,
315: };
316:
317: /* Bits in the interrupt status/enable registers. */
318: /* The bits in the Intr Status/Enable registers, mostly interrupt sources. */
319: enum intr_status_bits {
320: NormalIntr=0x10000, AbnormalIntr=0x8000,
321: IntrPCIErr=0x2000, TimerInt=0x800,
322: IntrRxDied=0x100, RxNoBuf=0x80, IntrRxDone=0x40,
323: TxFIFOUnderflow=0x20, RxErrIntr=0x10,
324: TxIdle=0x04, IntrTxStopped=0x02, IntrTxDone=0x01,
325: };
326:
327: /* Bits in the NetworkConfig register. */
328: enum rx_mode_bits {
329: TxOn=0x2000, RxOn=0x0002, FullDuplex=0x0200,
330: AcceptErr=0x80, AcceptRunt=0x40, /* Not used */
331: AcceptBroadcast=0x20, AcceptMulticast=0x10, AcceptAllPhys=0x08,
332: };
333:
334: enum mii_reg_bits {
335: MDIO_ShiftClk=0x10000, MDIO_DataIn=0x80000, MDIO_DataOut=0x20000,
336: MDIO_EnbOutput=0x40000, MDIO_EnbIn = 0x00000,
337: };
338:
339: /* The Tulip-like Rx and Tx buffer descriptors. */
340: struct w840_rx_desc {
341: s32 status;
342: s32 length;
343: u32 buffer1;
344: u32 next_desc;
345: };
346:
347: struct w840_tx_desc {
348: s32 status;
349: s32 length;
350: u32 buffer1, buffer2; /* We use only buffer 1. */
351: char pad[TX_DESC_SIZE - 16];
352: };
353:
354: /* Bits in network_desc.status */
355: enum desc_status_bits {
356: DescOwn=0x80000000, DescEndRing=0x02000000, DescUseLink=0x01000000,
357: DescWholePkt=0x60000000, DescStartPkt=0x20000000, DescEndPkt=0x40000000,
358: DescIntr=0x80000000,
359: };
360:
361: #define PRIV_ALIGN 15 /* Required alignment mask */
362: struct netdev_private {
363: /* Descriptor rings first for alignment. */
364: struct w840_rx_desc rx_ring[RX_RING_SIZE];
365: struct w840_tx_desc tx_ring[TX_RING_SIZE];
366: struct net_device *next_module; /* Link for devices of this type. */
367: void *priv_addr; /* Unaligned address for kfree */
368: const char *product_name;
369: /* The addresses of receive-in-place skbuffs. */
370: struct sk_buff* rx_skbuff[RX_RING_SIZE];
371: /* The saved address of a sent-in-place packet/buffer, for later free(). */
372: struct sk_buff* tx_skbuff[TX_RING_SIZE];
373: struct net_device_stats stats;
374: struct timer_list timer; /* Media monitoring timer. */
375: /* Frequently used values: keep some adjacent for cache effect. */
376: int msg_level;
377: int chip_id, drv_flags;
378: struct pci_dev *pci_dev;
379: int csr0, csr6;
380: unsigned int polling; /* Switched to polling mode. */
381: int max_interrupt_work;
382:
383: struct w840_rx_desc *rx_head_desc;
384: unsigned int rx_ring_size;
385: unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
386: unsigned int rx_buf_sz; /* Based on MTU+slack. */
387: int rx_copybreak;
388:
389: unsigned int tx_ring_size;
390: unsigned int cur_tx, dirty_tx;
391: unsigned int tx_q_bytes, tx_unq_bytes;
392: unsigned int tx_full:1; /* The Tx queue is full. */
393:
394: /* These values track of the transceiver/media in use. */
395: unsigned int full_duplex:1; /* Full-duplex operation requested. */
396: unsigned int duplex_lock:1;
397: unsigned int medialock:1; /* Do not sense media. */
398: unsigned int default_port; /* Last dev->if_port value. */
399: /* Rx filter. */
400: u32 cur_rx_mode;
401: u32 rx_filter[2];
402: int multicast_filter_limit;
403:
404: /* MII transceiver section. */
405: int mii_cnt; /* MII device addresses. */
406: u16 advertising; /* NWay media advertisement */
407: unsigned char phys[2]; /* MII device addresses. */
408: };
409:
410: static int eeprom_read(long ioaddr, int location);
411: static int mdio_read(struct net_device *dev, int phy_id, int location);
412: static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
413: static int netdev_open(struct net_device *dev);
414: static void check_duplex(struct net_device *dev);
415: static void netdev_timer(unsigned long data);
416: static void tx_timeout(struct net_device *dev);
417: static void init_ring(struct net_device *dev);
418: static int start_tx(struct sk_buff *skb, struct net_device *dev);
419: static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
420: static void netdev_error(struct net_device *dev, int intr_status);
421: static int netdev_rx(struct net_device *dev);
422: static void netdev_error(struct net_device *dev, int intr_status);
423: static inline unsigned ether_crc(int length, unsigned char *data);
424: static void set_rx_mode(struct net_device *dev);
425: static struct net_device_stats *get_stats(struct net_device *dev);
426: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
427: static int netdev_close(struct net_device *dev);
428:
429:
430:
431: /* A list of our installed devices, for removing the driver module. */
432: static struct net_device *root_net_dev = NULL;
433:
434: static void *w840_probe1(struct pci_dev *pdev, void *init_dev,
435: long ioaddr, int irq, int chip_idx, int card_idx)
436: {
437: struct net_device *dev;
438: struct netdev_private *np;
439: void *priv_mem;
440: int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0;
441:
442: dev = init_etherdev(init_dev, 0);
443: if (!dev)
444: return NULL;
445:
446: #if LINUX_VERSION_CODE < 0x20155
447: printk(KERN_INFO "%s: %s at 0x%lx, %2.2x:%2.2x",
448: dev->name, pci_id_tbl[chip_idx].name, ioaddr,
449: pci_bus_number(pdev), pci_devfn(pdev)>>3);
450: #else
451: printk(KERN_INFO "%s: %s at 0x%lx, %2.2x:%2.2x",
452: dev->name, pci_id_tbl[chip_idx].name, ioaddr,
453: pdev->bus->number, pdev->devfn>>3);
454: #endif
455:
456: /* Warning: validate for big-endian machines. */
457: for (i = 0; i < 3; i++)
458: ((u16 *)dev->dev_addr)[i] = le16_to_cpu(eeprom_read(ioaddr, i));
459:
460: for (i = 0; i < 5; i++)
461: printk("%2.2x:", dev->dev_addr[i]);
462: printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
463:
464: priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL);
465: /* Out of memory is very unlikely. */
466: if (priv_mem == NULL)
467: return NULL;
468:
469: #ifdef USE_IO_OPS
470: request_region(ioaddr, pci_id_tbl[chip_idx].io_size, dev->name);
471: #endif
472:
473: /* Reset the chip to erase previous misconfiguration.
474: No hold time required! */
475: writel(0x00000001, ioaddr + PCIBusCfg);
476:
477: dev->base_addr = ioaddr;
478: dev->irq = irq;
479:
480: /* The descriptor lists must be aligned. */
481: dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN);
482: memset(np, 0, sizeof(*np));
483: np->priv_addr = priv_mem;
484:
485: np->next_module = root_net_dev;
486: root_net_dev = dev;
487:
488: np->pci_dev = pdev;
489: np->chip_id = chip_idx;
490: np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
491: np->msg_level = (1 << debug) - 1;
492: np->rx_copybreak = rx_copybreak;
493: np->max_interrupt_work = max_interrupt_work;
494: np->multicast_filter_limit = multicast_filter_limit;
495: np->tx_ring_size = TX_RING_SIZE;
496: np->rx_ring_size = RX_RING_SIZE;
497:
498: if (dev->mem_start)
499: option = dev->mem_start;
500:
501: if ((card_idx < MAX_UNITS && full_duplex[card_idx] > 0)
502: || (np->drv_flags & AlwaysFDX))
503: np->full_duplex = 1;
504:
505: /* The chip-specific entries in the device structure. */
506: dev->open = &netdev_open;
507: dev->hard_start_xmit = &start_tx;
508: dev->stop = &netdev_close;
509: dev->get_stats = &get_stats;
510: dev->set_multicast_list = &set_rx_mode;
511: dev->do_ioctl = &mii_ioctl;
512:
513: if (np->drv_flags & CanHaveMII) {
514: int phy, phy_idx = 0;
515: for (phy = 1; phy < 32 && phy_idx < 4; phy++) {
516: int mii_status = mdio_read(dev, phy, 1);
517: if (mii_status != 0xffff && mii_status != 0x0000) {
518: np->phys[phy_idx++] = phy;
519: np->advertising = mdio_read(dev, phy, 4);
520: printk(KERN_INFO "%s: MII PHY found at address %d, status "
521: "0x%4.4x advertising %4.4x.\n",
522: dev->name, phy, mii_status, np->advertising);
523: }
524: }
525: np->mii_cnt = phy_idx;
526: if (phy_idx == 0) {
527: printk(KERN_WARNING "%s: MII PHY not found -- this device may "
528: "not operate correctly.\n"
529: KERN_WARNING "%s: If this is a switch card, explicitly "
530: "force full duplex on this interface.\n",
531: dev->name, dev->name);
532: if (np->drv_flags & FDXOnNoMII) {
533: printk(KERN_INFO "%s: Assuming a switch card, forcing full "
534: "duplex.\n", dev->name);
535: np->full_duplex = np->duplex_lock = 1;
536: }
537: }
538: }
539: /* Allow forcing the media type. */
540: if (np->full_duplex) {
541: printk(KERN_INFO "%s: Set to forced full duplex, autonegotiation"
542: " disabled.\n", dev->name);
543: np->duplex_lock = 1;
544: }
545: if (option > 0) {
546: if (option & 0x220)
547: np->full_duplex = 1;
548: np->default_port = option & 0x3ff;
549: if (np->default_port & 0x330) {
550: np->medialock = 1;
551: printk(KERN_INFO " Forcing %dMbs %s-duplex operation.\n",
552: (option & 0x300 ? 100 : 10),
553: (np->full_duplex ? "full" : "half"));
554: if (np->mii_cnt)
555: mdio_write(dev, np->phys[0], 0,
556: ((option & 0x300) ? 0x2000 : 0) | /* 100mbps? */
557: (np->full_duplex ? 0x0100 : 0)); /* Full duplex? */
558: }
559: }
560:
561: return dev;
562: }
563:
564:
565: /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
566: The Winbond NIC uses serial bit streams generated by the host processor. */
567:
568: /* Delay between EEPROM clock transitions.
569: This "delay" is to force out buffered PCI writes. */
570: #define eeprom_delay(ee_addr) readl(ee_addr)
571:
572: enum EEPROM_Ctrl_Bits {
573: EE_ShiftClk=0x02, EE_Write0=0x801, EE_Write1=0x805,
574: EE_ChipSelect=0x801, EE_DataIn=0x08,
575: };
576:
577: /* The EEPROM commands always start with 01.. preamble bits.
578: Commands are prepended to the variable-length address. */
579: enum EEPROM_Cmds {
580: EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
581: };
582:
583: static int eeprom_read(long addr, int location)
584: {
585: int i;
586: int retval = 0;
587: long ee_addr = addr + EECtrl;
588: int read_cmd = location | EE_ReadCmd;
589:
590: writel(EE_ChipSelect, ee_addr);
591: /* Shift the read command bits out. */
592: for (i = 10; i >= 0; i--) {
593: short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
594: writel(dataval, ee_addr);
595: eeprom_delay(ee_addr);
596: writel(dataval | EE_ShiftClk, ee_addr);
597: eeprom_delay(ee_addr);
598: }
599: writel(EE_ChipSelect, ee_addr);
600: eeprom_delay(ee_addr);
601:
602: for (i = 16; i > 0; i--) {
603: writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
604: eeprom_delay(ee_addr);
605: retval = (retval << 1) | ((readl(ee_addr) & EE_DataIn) ? 1 : 0);
606: writel(EE_ChipSelect, ee_addr);
607: eeprom_delay(ee_addr);
608: }
609:
610: /* Terminate the EEPROM access. */
611: writel(0, ee_addr);
612: return retval;
613: }
614:
615: /* MII transceiver control section.
616: Read and write the MII registers using software-generated serial
617: MDIO protocol. See the MII specifications or DP83840A data sheet
618: for details.
619:
620: The maximum data clock rate is 2.5 Mhz.
621: The timing is decoupled from the processor clock by flushing the write
622: from the CPU write buffer with a following read, and using PCI
623: transaction time. */
624: #define mdio_in(mdio_addr) readl(mdio_addr)
625: #define mdio_out(value, mdio_addr) writel(value, mdio_addr)
626: #define mdio_delay(mdio_addr) readl(mdio_addr)
627:
628: /* Set iff a MII transceiver on any interface requires mdio preamble.
629: This only set with older tranceivers, so the extra
630: code size of a per-interface flag is not worthwhile. */
631: static char mii_preamble_required = 1;
632:
633: #define MDIO_WRITE0 (MDIO_EnbOutput)
634: #define MDIO_WRITE1 (MDIO_DataOut | MDIO_EnbOutput)
635:
636: /* Generate the preamble required for initial synchronization and
637: a few older transceivers. */
638: static void mdio_sync(long mdio_addr)
639: {
640: int bits = 32;
641:
642: /* Establish sync by sending at least 32 logic ones. */
643: while (--bits >= 0) {
644: mdio_out(MDIO_WRITE1, mdio_addr);
645: mdio_delay(mdio_addr);
646: mdio_out(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
647: mdio_delay(mdio_addr);
648: }
649: }
650:
651: static int mdio_read(struct net_device *dev, int phy_id, int location)
652: {
653: long mdio_addr = dev->base_addr + MIICtrl;
654: int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
655: int i, retval = 0;
656:
657: if (mii_preamble_required)
658: mdio_sync(mdio_addr);
659:
660: /* Shift the read command bits out. */
661: for (i = 15; i >= 0; i--) {
662: int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
663:
664: mdio_out(dataval, mdio_addr);
665: mdio_delay(mdio_addr);
666: mdio_out(dataval | MDIO_ShiftClk, mdio_addr);
667: mdio_delay(mdio_addr);
668: }
669: /* Read the two transition, 16 data, and wire-idle bits. */
670: for (i = 20; i > 0; i--) {
671: mdio_out(MDIO_EnbIn, mdio_addr);
672: mdio_delay(mdio_addr);
673: retval = (retval << 1) | ((mdio_in(mdio_addr) & MDIO_DataIn) ? 1 : 0);
674: mdio_out(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
675: mdio_delay(mdio_addr);
676: }
677: return (retval>>1) & 0xffff;
678: }
679:
680: static void mdio_write(struct net_device *dev, int phy_id, int reg, int value)
681: {
682: long mdio_addr = dev->base_addr + MIICtrl;
683: int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (reg<<18) | value;
684: int i;
685:
686: if (mii_preamble_required)
687: mdio_sync(mdio_addr);
688:
689: /* Shift the command bits out. */
690: for (i = 31; i >= 0; i--) {
691: int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
692:
693: mdio_out(dataval, mdio_addr);
694: mdio_delay(mdio_addr);
695: mdio_out(dataval | MDIO_ShiftClk, mdio_addr);
696: mdio_delay(mdio_addr);
697: }
698: /* Clear out extra bits. */
699: for (i = 2; i > 0; i--) {
700: mdio_out(MDIO_EnbIn, mdio_addr);
701: mdio_delay(mdio_addr);
702: mdio_out(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
703: mdio_delay(mdio_addr);
704: }
705: return;
706: }
707:
708:
709: static int netdev_open(struct net_device *dev)
710: {
711: struct netdev_private *np = (struct netdev_private *)dev->priv;
712: long ioaddr = dev->base_addr;
713: int i;
714:
715: writel(0x00000001, ioaddr + PCIBusCfg); /* Reset */
716:
717: MOD_INC_USE_COUNT;
718:
719: if (request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev)) {
720: MOD_DEC_USE_COUNT;
721: return -EAGAIN;
722: }
723:
724: if (np->msg_level & NETIF_MSG_IFUP)
725: printk(KERN_DEBUG "%s: w89c840_open() irq %d.\n",
726: dev->name, dev->irq);
727:
728: init_ring(dev);
729:
730: writel(virt_to_bus(np->rx_ring), ioaddr + RxRingPtr);
731: writel(virt_to_bus(np->tx_ring), ioaddr + TxRingPtr);
732:
733: for (i = 0; i < 6; i++)
734: writeb(dev->dev_addr[i], ioaddr + StationAddr + i);
735:
736: /* Initialize other registers. */
737: np->csr0 = csr0;
738: writel(np->csr0, ioaddr + PCIBusCfg);
739:
740: if (dev->if_port == 0)
741: dev->if_port = np->default_port;
742:
743: writel(0, ioaddr + RxStartDemand);
744: np->csr6 = np->full_duplex ? 0x20022202 : 0x20022002;
745: check_duplex(dev);
746: set_rx_mode(dev);
747:
748: netif_start_tx_queue(dev);
749:
750: /* Clear and Enable interrupts by setting the interrupt mask.
751: See enum intr_status_bits above for bit guide.
752: We omit: TimerInt, IntrRxDied, IntrTxStopped
753: */
754: writel(0x1A0F5, ioaddr + IntrStatus);
755: writel(0x1A0F5, ioaddr + IntrEnable);
756:
757: if (np->msg_level & NETIF_MSG_IFUP)
758: printk(KERN_DEBUG "%s: Done netdev_open().\n", dev->name);
759:
760: /* Set the timer to check for link beat. */
761: init_timer(&np->timer);
762: np->timer.expires = jiffies + 3*HZ;
763: np->timer.data = (unsigned long)dev;
764: np->timer.function = &netdev_timer; /* timer handler */
765: add_timer(&np->timer);
766:
767: return 0;
768: }
769:
770: static void check_duplex(struct net_device *dev)
771: {
772: struct netdev_private *np = (struct netdev_private *)dev->priv;
773: int mii_reg5 = mdio_read(dev, np->phys[0], 5);
774: int negotiated = mii_reg5 & np->advertising;
775: int duplex;
776:
777: if (np->duplex_lock || mii_reg5 == 0xffff)
778: return;
779: duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
780: if (np->full_duplex != duplex) {
781: np->full_duplex = duplex;
782: if (np->msg_level & NETIF_MSG_LINK)
783: printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
784: "negotiated capability %4.4x.\n", dev->name,
785: duplex ? "full" : "half", np->phys[0], negotiated);
786: np->csr6 &= ~0x200;
787: np->csr6 |= duplex ? 0x200 : 0;
788: }
789: }
790:
791: static void netdev_timer(unsigned long data)
792: {
793: struct net_device *dev = (struct net_device *)data;
794: struct netdev_private *np = (struct netdev_private *)dev->priv;
795: long ioaddr = dev->base_addr;
796: int next_tick = 10*HZ;
797: int old_csr6 = np->csr6;
798: u32 intr_status = readl(ioaddr + IntrStatus);
799:
800: if (np->msg_level & NETIF_MSG_TIMER)
801: printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x "
802: "config %8.8x.\n",
803: dev->name, intr_status, (int)readl(ioaddr + NetworkConfig));
804: /* Check for blocked interrupts. */
805: if (np->polling) {
806: if (intr_status & 0x1ffff) {
807: intr_handler(dev->irq, dev, 0);
808: next_tick = 1;
809: np->polling = 1;
810: } else if (++np->polling > 10*HZ)
811: np->polling = 0;
812: else
813: next_tick = 2;
814: } else if ((intr_status & 0x1ffff)) {
815: np->polling = 1;
816: }
817:
818: if (netif_queue_paused(dev) &&
819: np->cur_tx - np->dirty_tx > 1 &&
820: (jiffies - dev->trans_start) > TX_TIMEOUT) {
821: tx_timeout(dev);
822: }
823: check_duplex(dev);
824: if (np->csr6 != old_csr6) {
825: writel(np->csr6 & ~0x0002, ioaddr + NetworkConfig);
826: writel(np->csr6 | 0x2002, ioaddr + NetworkConfig);
827: }
828: np->timer.expires = jiffies + next_tick;
829: add_timer(&np->timer);
830: }
831:
832: static void tx_timeout(struct net_device *dev)
833: {
834: struct netdev_private *np = (struct netdev_private *)dev->priv;
835: long ioaddr = dev->base_addr;
836:
837: printk(KERN_WARNING "%s: Transmit timed out, status %8.8x,"
838: " resetting...\n", dev->name, (int)readl(ioaddr + IntrStatus));
839:
840: #ifndef __alpha__
841: if (np->msg_level & NETIF_MSG_TX_ERR) {
842: int i;
843: printk(KERN_DEBUG " Rx ring %p: ", np->rx_ring);
844: for (i = 0; i < np->rx_ring_size; i++)
845: printk(" %8.8x", (unsigned int)np->rx_ring[i].status);
846: printk("\n"KERN_DEBUG" Tx ring %p: ", np->tx_ring);
847: for (i = 0; i < np->tx_ring_size; i++)
848: printk(" %8.8x", np->tx_ring[i].status);
849: printk("\n");
850: }
851: #endif
852:
853: /* Perhaps we should reinitialize the hardware here. Just trigger a
854: Tx demand for now. */
855: writel(0, ioaddr + TxStartDemand);
856: dev->if_port = 0;
857: /* Stop and restart the chip's Tx processes . */
858:
859: dev->trans_start = jiffies;
860: np->stats.tx_errors++;
861: return;
862: }
863:
864:
865: /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
866: static void init_ring(struct net_device *dev)
867: {
868: struct netdev_private *np = (struct netdev_private *)dev->priv;
869: int i;
870:
871: np->tx_full = 0;
872: np->cur_tx = np->dirty_tx = 0;
873: np->tx_q_bytes = np->tx_unq_bytes = 0;
874:
875: np->cur_rx = np->dirty_rx = 0;
876: np->rx_buf_sz = (dev->mtu <= 1522 ? PKT_BUF_SZ : dev->mtu + 14);
877: np->rx_head_desc = &np->rx_ring[0];
878:
879: /* Initialize all Rx descriptors. */
880: for (i = 0; i < np->rx_ring_size; i++) {
881: np->rx_ring[i].length = np->rx_buf_sz;
882: np->rx_ring[i].status = 0;
883: np->rx_ring[i].next_desc = virt_to_bus(&np->rx_ring[i+1]);
884: np->rx_skbuff[i] = 0;
885: }
886: /* Mark the last entry as wrapping the ring. */
887: np->rx_ring[i-1].length |= DescEndRing;
888: np->rx_ring[i-1].next_desc = virt_to_bus(&np->rx_ring[0]);
889:
890: /* Fill in the Rx buffers. Handle allocation failure gracefully. */
891: for (i = 0; i < np->rx_ring_size; i++) {
892: struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
893: np->rx_skbuff[i] = skb;
894: if (skb == NULL)
895: break;
896: skb->dev = dev; /* Mark as being used by this device. */
897: np->rx_ring[i].buffer1 = virt_to_bus(skb->tail);
898: np->rx_ring[i].status = DescOwn | DescIntr;
899: }
900: np->dirty_rx = (unsigned int)(i - np->rx_ring_size);
901:
902: for (i = 0; i < np->tx_ring_size; i++) {
903: np->tx_skbuff[i] = 0;
904: np->tx_ring[i].status = 0;
905: }
906: return;
907: }
908:
909: static int start_tx(struct sk_buff *skb, struct net_device *dev)
910: {
911: struct netdev_private *np = (struct netdev_private *)dev->priv;
912: unsigned entry;
913:
914: /* Block a timer-based transmit from overlapping. */
915: if (netif_pause_tx_queue(dev) != 0) {
916: /* This watchdog code is redundant with the media monitor timer. */
917: if (jiffies - dev->trans_start > TX_TIMEOUT)
918: tx_timeout(dev);
919: return 1;
920: }
921:
922: /* Note: Ordering is important here, set the field with the
923: "ownership" bit last, and only then increment cur_tx. */
924:
925: /* Calculate the next Tx descriptor entry. */
926: entry = np->cur_tx % np->tx_ring_size;
927:
928: np->tx_skbuff[entry] = skb;
929: np->tx_ring[entry].buffer1 = virt_to_bus(skb->data);
930:
931: #define one_buffer
932: #define BPT 1022
933: #if defined(one_buffer)
934: np->tx_ring[entry].length = DescWholePkt | skb->len;
935: if (entry >= np->tx_ring_size-1) /* Wrap ring */
936: np->tx_ring[entry].length |= DescIntr | DescEndRing;
937: np->tx_ring[entry].status = DescOwn;
938: np->cur_tx++;
939: #elif defined(two_buffer)
940: if (skb->len > BPT) {
941: unsigned int entry1 = ++np->cur_tx % np->tx_ring_size;
942: np->tx_ring[entry].length = DescStartPkt | BPT;
943: np->tx_ring[entry1].length = DescEndPkt | (skb->len - BPT);
944: np->tx_ring[entry1].buffer1 = virt_to_bus((skb->data) + BPT);
945: np->tx_ring[entry1].status = DescOwn;
946: np->tx_ring[entry].status = DescOwn;
947: if (entry >= np->tx_ring_size-1)
948: np->tx_ring[entry].length |= DescIntr|DescEndRing;
949: else if (entry1 >= np->tx_ring_size-1)
950: np->tx_ring[entry1].length |= DescIntr|DescEndRing;
951: np->cur_tx++;
952: } else {
953: np->tx_ring[entry].length = DescWholePkt | skb->len;
954: if (entry >= np->tx_ring_size-1) /* Wrap ring */
955: np->tx_ring[entry].length |= DescIntr | DescEndRing;
956: np->tx_ring[entry].status = DescOwn;
957: np->cur_tx++;
958: }
959: #elif defined(split_buffer)
960: {
961: /* Work around the Tx-FIFO-full bug by splitting our transmit packet
962: into two pieces, the first which may be loaded without overflowing
963: the FIFO, and the second which contains the remainder of the
964: packet. When we get a Tx-done interrupt that frees enough room
965: in the FIFO we mark the remainder of the packet as loadable.
966:
967: This has the problem that the Tx descriptors are written both
968: here and in the interrupt handler.
969: */
970:
971: int buf1size = TX_FIFO_SIZE - (np->tx_q_bytes - np->tx_unq_bytes);
972: int buf2size = skb->len - buf1size;
973:
974: if (buf2size <= 0) { /* We fit into one descriptor. */
975: np->tx_ring[entry].length = DescWholePkt | skb->len;
976: } else { /* We must use two descriptors. */
977: unsigned int entry2;
978: np->tx_ring[entry].length = DescIntr | DescStartPkt | buf1size;
979: if (entry >= np->tx_ring_size-1) { /* Wrap ring */
980: np->tx_ring[entry].length |= DescEndRing;
981: entry2 = 0;
982: } else
983: entry2 = entry + 1;
984: np->cur_tx++;
985: np->tx_ring[entry2].buffer1 =
986: virt_to_bus(skb->data + buf1size);
987: np->tx_ring[entry2].length = DescEndPkt | buf2size;
988: if (entry2 >= np->tx_ring_size-1) /* Wrap ring */
989: np->tx_ring[entry2].length |= DescEndRing;
990: }
991: np->tx_ring[entry].status = DescOwn;
992: np->cur_tx++;
993: }
994: #endif
995: np->tx_q_bytes += skb->len;
996: writel(0, dev->base_addr + TxStartDemand);
997:
998: /* Work around horrible bug in the chip by marking the queue as full
999: when we do not have FIFO room for a maximum sized packet. */
1000: if (np->cur_tx - np->dirty_tx > TX_QUEUE_LEN) {
1001: np->tx_full = 1;
1002: netif_stop_tx_queue(dev);
1003: } else if ((np->drv_flags & HasBrokenTx)
1004: && np->tx_q_bytes - np->tx_unq_bytes > TX_BUG_FIFO_LIMIT) {
1005: np->tx_full = 1;
1006: netif_stop_tx_queue(dev);
1007: } else
1008: netif_unpause_tx_queue(dev); /* Typical path */
1009:
1010: dev->trans_start = jiffies;
1011:
1012: if (np->msg_level & NETIF_MSG_TX_QUEUED) {
1013: printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
1014: dev->name, np->cur_tx, entry);
1015: }
1016: return 0;
1017: }
1018:
1019: /* The interrupt handler does all of the Rx thread work and cleans up
1020: after the Tx thread. */
1021: static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
1022: {
1023: struct net_device *dev = (struct net_device *)dev_instance;
1024: struct netdev_private *np = (struct netdev_private *)dev->priv;
1025: long ioaddr = dev->base_addr;
1026: int work_limit = np->max_interrupt_work;
1027:
1028: do {
1029: u32 intr_status = readl(ioaddr + IntrStatus);
1030:
1031: /* Acknowledge all of the current interrupt sources ASAP. */
1032: writel(intr_status & 0x0001ffff, ioaddr + IntrStatus);
1033:
1034: if (np->msg_level & NETIF_MSG_INTR)
1035: printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
1036: dev->name, intr_status);
1037:
1038: if ((intr_status & (NormalIntr|AbnormalIntr)) == 0
1039: || intr_status == 0xffffffff)
1040: break;
1041:
1042: if (intr_status & (IntrRxDone | RxNoBuf))
1043: netdev_rx(dev);
1044:
1045: for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1046: int entry = np->dirty_tx % np->tx_ring_size;
1047: int tx_status = np->tx_ring[entry].status;
1048:
1049: if (tx_status < 0)
1050: break;
1051: if (np->msg_level & NETIF_MSG_TX_DONE)
1052: printk(KERN_DEBUG "%s: Transmit done, Tx status %8.8x.\n",
1053: dev->name, tx_status);
1054: if (tx_status & 0x8000) { /* There was an error, log it. */
1055: if (np->msg_level & NETIF_MSG_TX_ERR)
1056: printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1057: dev->name, tx_status);
1058: np->stats.tx_errors++;
1059: if (tx_status & 0x0104) np->stats.tx_aborted_errors++;
1060: if (tx_status & 0x0C80) np->stats.tx_carrier_errors++;
1061: if (tx_status & 0x0200) np->stats.tx_window_errors++;
1062: if (tx_status & 0x0002) np->stats.tx_fifo_errors++;
1063: if ((tx_status & 0x0080) && np->full_duplex == 0)
1064: np->stats.tx_heartbeat_errors++;
1065: #ifdef ETHER_STATS
1066: if (tx_status & 0x0100) np->stats.collisions16++;
1067: #endif
1068: } else {
1069: #ifdef ETHER_STATS
1070: if (tx_status & 0x0001) np->stats.tx_deferred++;
1071: #endif
1072: #if LINUX_VERSION_CODE > 0x20127
1073: np->stats.tx_bytes += np->tx_skbuff[entry]->len;
1074: #endif
1075: np->stats.collisions += (tx_status >> 3) & 15;
1076: np->stats.tx_packets++;
1077: }
1078: /* Free the original skb. */
1079: np->tx_unq_bytes += np->tx_skbuff[entry]->len;
1080: dev_free_skb_irq(np->tx_skbuff[entry]);
1081: np->tx_skbuff[entry] = 0;
1082: }
1083: if (np->tx_full &&
1084: np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4
1085: && np->tx_q_bytes - np->tx_unq_bytes < TX_BUG_FIFO_LIMIT) {
1086: /* The ring is no longer full, allow new TX entries. */
1087: np->tx_full = 0;
1088: netif_resume_tx_queue(dev);
1089: }
1090:
1091: /* Abnormal error summary/uncommon events handlers. */
1092: if (intr_status & (AbnormalIntr | TxFIFOUnderflow | IntrPCIErr |
1093: TimerInt | IntrTxStopped))
1094: netdev_error(dev, intr_status);
1095:
1096: if (--work_limit < 0) {
1097: printk(KERN_WARNING "%s: Too much work at interrupt, "
1098: "status=0x%4.4x.\n", dev->name, intr_status);
1099: /* Set the timer to re-enable the other interrupts after
1100: 10*82usec ticks. */
1101: writel(AbnormalIntr | TimerInt, ioaddr + IntrEnable);
1102: writel(10, ioaddr + GPTimer);
1103: break;
1104: }
1105: } while (1);
1106:
1107: if (np->msg_level & NETIF_MSG_INTR)
1108: printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1109: dev->name, (int)readl(ioaddr + IntrStatus));
1110:
1111: return;
1112: }
1113:
1114: /* This routine is logically part of the interrupt handler, but separated
1115: for clarity and better register allocation. */
1116: static int netdev_rx(struct net_device *dev)
1117: {
1118: struct netdev_private *np = (struct netdev_private *)dev->priv;
1119: int entry = np->cur_rx % np->rx_ring_size;
1120: int work_limit = np->dirty_rx + np->rx_ring_size - np->cur_rx;
1121:
1122: if (np->msg_level & NETIF_MSG_RX_STATUS) {
1123: printk(KERN_DEBUG " In netdev_rx(), entry %d status %4.4x.\n",
1124: entry, np->rx_ring[entry].status);
1125: }
1126:
1127: /* If EOP is set on the next entry, it's a new packet. Send it up. */
1128: while (--work_limit >= 0) {
1129: struct w840_rx_desc *desc = np->rx_head_desc;
1130: s32 status = desc->status;
1131:
1132: if (np->msg_level & NETIF_MSG_RX_STATUS)
1133: printk(KERN_DEBUG " netdev_rx() status was %8.8x.\n",
1134: status);
1135: if (status < 0)
1136: break;
1137: if ((status & 0x38008300) != 0x0300) {
1138: if ((status & 0x38000300) != 0x0300) {
1139: /* Ingore earlier buffers. */
1140: if ((status & 0xffff) != 0x7fff) {
1141: printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1142: "multiple buffers, entry %#x status %4.4x!\n",
1143: dev->name, np->cur_rx, status);
1144: np->stats.rx_length_errors++;
1145: }
1146: } else if (status & 0x8000) {
1147: /* There was a fatal error. */
1148: if (np->msg_level & NETIF_MSG_RX_ERR)
1149: printk(KERN_DEBUG "%s: Receive error, Rx status %8.8x.\n",
1150: dev->name, status);
1151: np->stats.rx_errors++; /* end of a packet.*/
1152: if (status & 0x0890) np->stats.rx_length_errors++;
1153: if (status & 0x004C) np->stats.rx_frame_errors++;
1154: if (status & 0x0002) np->stats.rx_crc_errors++;
1155: }
1156: } else {
1157: struct sk_buff *skb;
1158: /* Omit the four octet CRC from the length. */
1159: int pkt_len = ((status >> 16) & 0x7ff) - 4;
1160:
1161: if (np->msg_level & NETIF_MSG_RX_STATUS)
1162: printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
1163: " status %x.\n", pkt_len, status);
1164: /* Check if the packet is long enough to accept without copying
1165: to a minimally-sized skbuff. */
1166: if (pkt_len < np->rx_copybreak
1167: && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1168: skb->dev = dev;
1169: skb_reserve(skb, 2); /* 16 byte align the IP header */
1170: /* Call copy + cksum if available. */
1171: #if HAS_IP_COPYSUM
1172: eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
1173: skb_put(skb, pkt_len);
1174: #else
1175: memcpy(skb_put(skb, pkt_len), np->rx_skbuff[entry]->tail,
1176: pkt_len);
1177: #endif
1178: } else {
1179: char *temp = skb_put(skb = np->rx_skbuff[entry], pkt_len);
1180: np->rx_skbuff[entry] = NULL;
1181: #ifndef final_version /* Remove after testing. */
1182: if (bus_to_virt(desc->buffer1) != temp)
1183: printk(KERN_ERR "%s: Internal fault: The skbuff addresses "
1184: "do not match in netdev_rx: %p vs. %p / %p.\n",
1185: dev->name, bus_to_virt(desc->buffer1),
1186: skb->head, temp);
1187: #endif
1188: }
1189: skb->protocol = eth_type_trans(skb, dev);
1190: netif_rx(skb);
1191: dev->last_rx = jiffies;
1192: np->stats.rx_packets++;
1193: #if LINUX_VERSION_CODE > 0x20127
1194: np->stats.rx_bytes += pkt_len;
1195: #endif
1196: }
1197: entry = (++np->cur_rx) % np->rx_ring_size;
1198: np->rx_head_desc = &np->rx_ring[entry];
1199: }
1200:
1201: /* Refill the Rx ring buffers. */
1202: for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1203: struct sk_buff *skb;
1204: entry = np->dirty_rx % np->rx_ring_size;
1205: if (np->rx_skbuff[entry] == NULL) {
1206: skb = dev_alloc_skb(np->rx_buf_sz);
1207: np->rx_skbuff[entry] = skb;
1208: if (skb == NULL)
1209: break; /* Better luck next round. */
1210: skb->dev = dev; /* Mark as being used by this device. */
1211: np->rx_ring[entry].buffer1 = virt_to_bus(skb->tail);
1212: }
1213: np->rx_ring[entry].status = DescOwn;
1214: }
1215:
1216: return 0;
1217: }
1218:
1219: static void netdev_error(struct net_device *dev, int intr_status)
1220: {
1221: long ioaddr = dev->base_addr;
1222: struct netdev_private *np = (struct netdev_private *)dev->priv;
1223:
1224: if (np->msg_level & NETIF_MSG_MISC)
1225: printk(KERN_DEBUG "%s: Abnormal event, %8.8x.\n",
1226: dev->name, intr_status);
1227: if (intr_status == 0xffffffff)
1228: return;
1229: if (intr_status & TxFIFOUnderflow) {
1230: np->csr6 += 0x4000; /* Bump up the Tx threshold */
1231: if (np->msg_level & NETIF_MSG_TX_ERR)
1232: printk(KERN_DEBUG "%s: Tx underflow, increasing threshold to "
1233: "%8.8x.\n", dev->name, np->csr6);
1234: writel(np->csr6, ioaddr + NetworkConfig);
1235: }
1236: if (intr_status & IntrRxDied) { /* Missed a Rx frame. */
1237: np->stats.rx_errors++;
1238: }
1239: if (intr_status & TimerInt) {
1240: /* Re-enable other interrupts. */
1241: writel(0x1A0F5, ioaddr + IntrEnable);
1242: }
1243: np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
1244: writel(0, ioaddr + RxStartDemand);
1245: }
1246:
1247: static struct net_device_stats *get_stats(struct net_device *dev)
1248: {
1249: long ioaddr = dev->base_addr;
1250: struct netdev_private *np = (struct netdev_private *)dev->priv;
1251:
1252: /* The chip only need report frame silently dropped. */
1253: if (netif_running(dev))
1254: np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
1255:
1256: return &np->stats;
1257: }
1258:
1259: static unsigned const ethernet_polynomial = 0x04c11db7U;
1260: static inline u32 ether_crc(int length, unsigned char *data)
1261: {
1262: int crc = -1;
1263:
1264: while(--length >= 0) {
1265: unsigned char current_octet = *data++;
1266: int bit;
1267: for (bit = 0; bit < 8; bit++, current_octet >>= 1) {
1268: crc = (crc << 1) ^
1269: ((crc < 0) ^ (current_octet & 1) ? ethernet_polynomial : 0);
1270: }
1271: }
1272: return crc;
1273: }
1274:
1275: static void set_rx_mode(struct net_device *dev)
1276: {
1277: struct netdev_private *np = (struct netdev_private *)dev->priv;
1278: long ioaddr = dev->base_addr;
1279: u32 mc_filter[2]; /* Multicast hash filter */
1280: u32 rx_mode;
1281:
1282: if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1283: /* Unconditionally log net taps. */
1284: printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
1285: memset(mc_filter, ~0, sizeof(mc_filter));
1286: rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAllPhys;
1287: } else if ((dev->mc_count > np->multicast_filter_limit)
1288: || (dev->flags & IFF_ALLMULTI)) {
1289: /* Too many to match, or accept all multicasts. */
1290: memset(mc_filter, 0xff, sizeof(mc_filter));
1291: rx_mode = AcceptBroadcast | AcceptMulticast;
1292: } else {
1293: struct dev_mc_list *mclist;
1294: int i;
1295: memset(mc_filter, 0, sizeof(mc_filter));
1296: for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1297: i++, mclist = mclist->next) {
1298: set_bit((ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26) ^ 0x3F,
1299: mc_filter);
1300: }
1301: rx_mode = AcceptBroadcast | AcceptMulticast;
1302: }
1303: writel(mc_filter[0], ioaddr + MulticastFilter0);
1304: writel(mc_filter[1], ioaddr + MulticastFilter1);
1305: np->csr6 &= ~0x00F8;
1306: np->csr6 |= rx_mode;
1307: writel(np->csr6, ioaddr + NetworkConfig);
1308: }
1309:
1310: static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1311: {
1312: struct netdev_private *np = (struct netdev_private *)dev->priv;
1313: u16 *data = (u16 *)&rq->ifr_data;
1314: u32 *data32 = (void *)&rq->ifr_data;
1315:
1316: switch(cmd) {
1317: case 0x8947: case 0x89F0:
1318: /* SIOCGMIIPHY: Get the address of the PHY in use. */
1319: data[0] = np->phys[0] & 0x1f;
1320: /* Fall Through */
1321: case 0x8948: case 0x89F1:
1322: /* SIOCGMIIREG: Read the specified MII register. */
1323: data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
1324: return 0;
1325: case 0x8949: case 0x89F2:
1326: /* SIOCSMIIREG: Write the specified MII register */
1327: if (!capable(CAP_NET_ADMIN))
1328: return -EPERM;
1329: if (data[0] == np->phys[0]) {
1330: u16 value = data[2];
1331: switch (data[1]) {
1332: case 0:
1333: /* Check for autonegotiation on or reset. */
1334: np->medialock = (value & 0x9000) ? 0 : 1;
1335: if (np->medialock)
1336: np->full_duplex = (value & 0x0100) ? 1 : 0;
1337: break;
1338: case 4: np->advertising = value; break;
1339: }
1340: /* Perhaps check_duplex(dev), depending on chip semantics. */
1341: }
1342: mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
1343: return 0;
1344: case SIOCGPARAMS:
1345: data32[0] = np->msg_level;
1346: data32[1] = np->multicast_filter_limit;
1347: data32[2] = np->max_interrupt_work;
1348: data32[3] = np->rx_copybreak;
1349: return 0;
1350: case SIOCSPARAMS:
1351: if (!capable(CAP_NET_ADMIN))
1352: return -EPERM;
1353: np->msg_level = data32[0];
1354: np->multicast_filter_limit = data32[1];
1355: np->max_interrupt_work = data32[2];
1356: np->rx_copybreak = data32[3];
1357: return 0;
1358: default:
1359: return -EOPNOTSUPP;
1360: }
1361: }
1362:
1363:
1364: static void empty_rings(struct net_device *dev)
1365: {
1366: struct netdev_private *np = (void *)dev->priv;
1367: int i;
1368:
1369: /* Free all the skbuffs in the Rx queue. */
1370: for (i = 0; i < np->rx_ring_size; i++) {
1371: np->rx_ring[i].status = 0;
1372: if (np->rx_skbuff[i]) {
1373: #if LINUX_VERSION_CODE < 0x20100
1374: np->rx_skbuff[i]->free = 1;
1375: #endif
1376: dev_free_skb(np->rx_skbuff[i]);
1377: }
1378: np->rx_skbuff[i] = 0;
1379: }
1380: for (i = 0; i < np->tx_ring_size; i++) {
1381: if (np->tx_skbuff[i])
1382: dev_free_skb(np->tx_skbuff[i]);
1383: np->tx_skbuff[i] = 0;
1384: }
1385: }
1386:
1387: static int netdev_close(struct net_device *dev)
1388: {
1389: long ioaddr = dev->base_addr;
1390: struct netdev_private *np = (struct netdev_private *)dev->priv;
1391:
1392: netif_stop_tx_queue(dev);
1393:
1394: if (np->msg_level & NETIF_MSG_IFDOWN) {
1395: printk(KERN_DEBUG "%s: Shutting down ethercard, status was %8.8x "
1396: "Config %8.8x.\n", dev->name, (int)readl(ioaddr + IntrStatus),
1397: (int)readl(ioaddr + NetworkConfig));
1398: printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1399: dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
1400: }
1401:
1402: /* Disable interrupts by clearing the interrupt mask. */
1403: writel(0x0000, ioaddr + IntrEnable);
1404:
1405: /* Stop the chip's Tx and Rx processes. */
1406: writel(np->csr6 &= ~0x20FA, ioaddr + NetworkConfig);
1407:
1408: del_timer(&np->timer);
1409: if (readl(ioaddr + NetworkConfig) != 0xffffffff)
1410: np->stats.rx_missed_errors += readl(ioaddr + RxMissed) & 0xffff;
1411:
1412: #ifdef __i386__
1413: if (np->msg_level & NETIF_MSG_IFDOWN) {
1414: int i;
1415: printk("\n"KERN_DEBUG" Tx ring at %8.8x:\n",
1416: (int)virt_to_bus(np->tx_ring));
1417: for (i = 0; i < np->tx_ring_size; i++)
1418: printk(KERN_DEBUG " #%d desc. %4.4x %8.8x %8.8x.\n",
1419: i, np->tx_ring[i].length,
1420: np->tx_ring[i].status, np->tx_ring[i].buffer1);
1421: printk(KERN_DEBUG "\n" KERN_DEBUG " Rx ring %8.8x:\n",
1422: (int)virt_to_bus(np->rx_ring));
1423: for (i = 0; i < np->rx_ring_size; i++) {
1424: printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
1425: i, np->rx_ring[i].length,
1426: np->rx_ring[i].status, np->rx_ring[i].buffer1);
1427: }
1428: }
1429: #endif /* __i386__ debugging only */
1430:
1431: free_irq(dev->irq, dev);
1432: empty_rings(dev);
1433:
1434: MOD_DEC_USE_COUNT;
1435:
1436: return 0;
1437: }
1438:
1439: static int winbond_pwr_event(void *dev_instance, int event)
1440: {
1441: struct net_device *dev = dev_instance;
1442: struct netdev_private *np = (struct netdev_private *)dev->priv;
1443: long ioaddr = dev->base_addr;
1444:
1445: if (np->msg_level & NETIF_MSG_LINK)
1446: printk(KERN_DEBUG "%s: Handling power event %d.\n", dev->name, event);
1447: switch(event) {
1448: case DRV_ATTACH:
1449: MOD_INC_USE_COUNT;
1450: break;
1451: case DRV_SUSPEND: {
1452: int csr6 = readl(ioaddr + NetworkConfig);
1453: /* Disable interrupts, stop the chip, gather stats. */
1454: if (csr6 != 0xffffffff) {
1455: int csr8 = readl(ioaddr + RxMissed);
1456: writel(0x00000000, ioaddr + IntrEnable);
1457: writel(csr6 & ~TxOn & ~RxOn, ioaddr + NetworkConfig);
1458: np->stats.rx_missed_errors += (unsigned short)csr8;
1459: }
1460: empty_rings(dev);
1461: break;
1462: }
1463: case DRV_RESUME:
1464: writel(np->csr0, ioaddr + PCIBusCfg);
1465: init_ring(dev);
1466: writel(virt_to_bus(np->rx_ring), ioaddr + RxRingPtr);
1467: writel(virt_to_bus(np->tx_ring), ioaddr + TxRingPtr);
1468: writel(0x1A0F5, ioaddr + IntrStatus);
1469: writel(0x1A0F5, ioaddr + IntrEnable);
1470: writel(np->csr6 | TxOn | RxOn, ioaddr + NetworkConfig);
1471: writel(0, ioaddr + RxStartDemand); /* Rx poll demand */
1472: set_rx_mode(dev);
1473: break;
1474: case DRV_DETACH: {
1475: struct net_device **devp, **next;
1476: if (dev->flags & IFF_UP) {
1477: printk(KERN_ERR "%s: Winbond-840 NIC removed while still "
1478: "active.\n", dev->name);
1479: dev_close(dev);
1480: dev->flags &= ~(IFF_UP|IFF_RUNNING);
1481: }
1482: unregister_netdev(dev);
1483: release_region(dev->base_addr, pci_id_tbl[np->chip_id].io_size);
1484: #ifndef USE_IO_OPS
1485: iounmap((char *)dev->base_addr);
1486: #endif
1487: for (devp = &root_net_dev; *devp; devp = next) {
1488: next = &((struct netdev_private *)(*devp)->priv)->next_module;
1489: if (*devp == dev) {
1490: *devp = *next;
1491: break;
1492: }
1493: }
1494: if (np->priv_addr)
1495: kfree(np->priv_addr);
1496: kfree(dev);
1497: MOD_DEC_USE_COUNT;
1498: break;
1499: }
1500: default:
1501: break;
1502: }
1503:
1504: return 0;
1505: }
1506:
1507:
1508: #ifdef MODULE
1509: int init_module(void)
1510: {
1511: if (debug >= NETIF_MSG_DRV) /* Emit version even if no cards detected. */
1512: printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
1513: return pci_drv_register(&winbond840_drv_id, NULL);
1514: }
1515:
1516: void cleanup_module(void)
1517: {
1518: struct net_device *next_dev;
1519:
1520: pci_drv_unregister(&winbond840_drv_id);
1521:
1522: /* No need to check MOD_IN_USE, as sys_delete_module() checks. */
1523: while (root_net_dev) {
1524: struct netdev_private *np = (void *)(root_net_dev->priv);
1525: unregister_netdev(root_net_dev);
1526: #ifdef USE_IO_OPS
1527: release_region(root_net_dev->base_addr,
1528: pci_id_tbl[np->chip_id].io_size);
1529: #else
1530: iounmap((char *)(root_net_dev->base_addr));
1531: #endif
1532: next_dev = np->next_module;
1533: if (np->priv_addr)
1534: kfree(np->priv_addr);
1535: kfree(root_net_dev);
1536: root_net_dev = next_dev;
1537: }
1538: }
1539: #else
1540: int winbond840_probe(struct net_device *dev)
1541: {
1542: if (pci_drv_register(&winbond840_drv_id, dev) < 0)
1543: return -ENODEV;
1544: printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
1545: return 0;
1546: }
1547: #endif /* MODULE */
1548:
1549:
1550: /*
1551: * Local variables:
1552: * compile-command: "make KERNVER=`uname -r` winbond-840.o"
1553: * compile-cmd: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c winbond-840.c"
1554: * c-indent-level: 4
1555: * c-basic-offset: 4
1556: * tab-width: 4
1557: * End:
1558: */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.