1 /* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */
3 Written/copyright 1997-2001 by Donald Becker.
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.
12 This driver is for the SMC83c170/175 "EPIC" series, as used on the
13 SMC EtherPower II 9432 PCI adapter, and several CardBus cards.
15 The author may be reached as becker@scyld.com, or C/O
16 Scyld Computing Corporation
17 410 Severn Ave., Suite 210
20 Information and updates available at
21 http://www.scyld.com/network/epic100.html
22 [this link no longer provides anything useful -jgarzik]
24 ---------------------------------------------------------------------
28 #define DRV_NAME "epic100"
29 #define DRV_VERSION "2.1"
30 #define DRV_RELDATE "Sept 11, 2006"
32 /* The user-configurable values.
33 These may be modified when a driver module is loaded.*/
35 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
37 /* Used to pass the full-duplex flag, etc. */
38 #define MAX_UNITS 8 /* More are supported, limit only on options */
39 static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
40 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
42 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
43 Setting to > 1518 effectively disables this feature. */
44 static int rx_copybreak;
46 /* Operational parameters that are set at compile time. */
48 /* Keep the ring sizes a power of two for operational efficiency.
49 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
50 Making the Tx ring too large decreases the effectiveness of channel
51 bonding and packet priority.
52 There are no ill effects from too-large receive rings. */
53 #define TX_RING_SIZE 256
54 #define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */
55 #define RX_RING_SIZE 256
56 #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc)
57 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc)
59 /* Operational parameters that usually are not changed. */
60 /* Time in jiffies before concluding the transmitter is hung. */
61 #define TX_TIMEOUT (2*HZ)
63 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
65 /* Bytes transferred to chip before transmission starts. */
66 /* Initial threshold, increased on underflow, rounded down to 4 byte units. */
67 #define TX_FIFO_THRESH 256
68 #define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */
70 #include <linux/module.h>
71 #include <linux/kernel.h>
72 #include <linux/string.h>
73 #include <linux/timer.h>
74 #include <linux/errno.h>
75 #include <linux/ioport.h>
76 #include <linux/slab.h>
77 #include <linux/interrupt.h>
78 #include <linux/pci.h>
79 #include <linux/delay.h>
80 #include <linux/netdevice.h>
81 #include <linux/etherdevice.h>
82 #include <linux/skbuff.h>
83 #include <linux/init.h>
84 #include <linux/spinlock.h>
85 #include <linux/ethtool.h>
86 #include <linux/mii.h>
87 #include <linux/crc32.h>
88 #include <linux/bitops.h>
90 #include <asm/uaccess.h>
92 /* These identify the driver base version and may not be removed. */
93 static char version[] __devinitdata =
94 DRV_NAME ".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>\n";
95 static char version2[] __devinitdata =
96 " (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n";
98 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
99 MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver");
100 MODULE_LICENSE("GPL");
102 module_param(debug, int, 0);
103 module_param(rx_copybreak, int, 0);
104 module_param_array(options, int, NULL, 0);
105 module_param_array(full_duplex, int, NULL, 0);
106 MODULE_PARM_DESC(debug, "EPIC/100 debug level (0-5)");
107 MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex");
108 MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames");
109 MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)");
114 I. Board Compatibility
116 This device driver is designed for the SMC "EPIC/100", the SMC
117 single-chip Ethernet controllers for PCI. This chip is used on
118 the SMC EtherPower II boards.
120 II. Board-specific settings
122 PCI bus devices are configured by the system at boot time, so no jumpers
123 need to be set on the board. The system BIOS will assign the
124 PCI INTA signal to a (preferably otherwise unused) system IRQ line.
125 Note: Kernel versions earlier than 1.3.73 do not support shared PCI
128 III. Driver operation
134 http://www.smsc.com/main/datasheets/83c171.pdf
135 http://www.smsc.com/main/datasheets/83c175.pdf
136 http://scyld.com/expert/NWay.html
137 http://www.national.com/pf/DP/DP83840A.html
144 enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 };
146 #define EPIC_TOTAL_SIZE 0x100
156 struct epic_chip_info {
158 int drv_flags; /* Driver use, intended as capability flags. */
162 /* indexed by chip_t */
163 static const struct epic_chip_info pci_id_tbl[] = {
164 { "SMSC EPIC/100 83c170", TYPE2_INTR | NO_MII | MII_PWRDWN },
165 { "SMSC EPIC/100 83c170", TYPE2_INTR },
166 { "SMSC EPIC/C 83c175", TYPE2_INTR | MII_PWRDWN },
170 static struct pci_device_id epic_pci_tbl[] = {
171 { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0 },
172 { 0x10B8, 0x0005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMSC_83C170 },
173 { 0x10B8, 0x0006, PCI_ANY_ID, PCI_ANY_ID,
174 PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, SMSC_83C175 },
177 MODULE_DEVICE_TABLE (pci, epic_pci_tbl);
195 /* Offsets to registers, using the (ugh) SMC names. */
196 enum epic_registers {
197 COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14,
199 TEST1=0x1C, CRCCNT=0x20, ALICNT=0x24, MPCNT=0x28, /* Rx error counters. */
200 MIICtrl=0x30, MIIData=0x34, MIICfg=0x38,
201 LAN0=64, /* MAC address. */
202 MC0=80, /* Multicast filter table. */
203 RxCtrl=96, TxCtrl=112, TxSTAT=0x74,
204 PRxCDAR=0x84, RxSTAT=0xA4, EarlyRx=0xB0, PTxCDAR=0xC4, TxThresh=0xDC,
207 /* Interrupt register bits, using my own meaningful names. */
209 TxIdle=0x40000, RxIdle=0x20000, IntrSummary=0x010000,
210 PCIBusErr170=0x7000, PCIBusErr175=0x1000, PhyEvent175=0x8000,
211 RxStarted=0x0800, RxEarlyWarn=0x0400, CntFull=0x0200, TxUnderrun=0x0100,
212 TxEmpty=0x0080, TxDone=0x0020, RxError=0x0010,
213 RxOverflow=0x0008, RxFull=0x0004, RxHeader=0x0002, RxDone=0x0001,
216 StopRx=1, StartRx=2, TxQueued=4, RxQueued=8,
217 StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80,
220 #define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
222 #define EpicNapiEvent (TxEmpty | TxDone | \
223 RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
224 #define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
226 static const u16 media2miictl[16] = {
227 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
228 0, 0, 0, 0, 0, 0, 0, 0 };
230 /* The EPIC100 Rx and Tx buffer descriptors. */
232 struct epic_tx_desc {
239 struct epic_rx_desc {
246 enum desc_status_bits {
250 #define PRIV_ALIGN 15 /* Required alignment mask */
251 struct epic_private {
252 struct epic_rx_desc *rx_ring;
253 struct epic_tx_desc *tx_ring;
254 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
255 struct sk_buff* tx_skbuff[TX_RING_SIZE];
256 /* The addresses of receive-in-place skbuffs. */
257 struct sk_buff* rx_skbuff[RX_RING_SIZE];
259 dma_addr_t tx_ring_dma;
260 dma_addr_t rx_ring_dma;
263 spinlock_t lock; /* Group with Tx control cache line. */
264 spinlock_t napi_lock;
265 unsigned int reschedule_in_poll;
266 unsigned int cur_tx, dirty_tx;
268 unsigned int cur_rx, dirty_rx;
270 unsigned int rx_buf_sz; /* Based on MTU+slack. */
272 struct pci_dev *pci_dev; /* PCI bus location. */
273 int chip_id, chip_flags;
275 struct net_device_stats stats;
276 struct timer_list timer; /* Media selection timer. */
278 unsigned char mc_filter[8];
279 signed char phys[4]; /* MII device addresses. */
280 u16 advertising; /* NWay media advertisement */
282 struct mii_if_info mii;
283 unsigned int tx_full:1; /* The Tx queue is full. */
284 unsigned int default_port:4; /* Last dev->if_port value. */
287 static int epic_open(struct net_device *dev);
288 static int read_eeprom(long ioaddr, int location);
289 static int mdio_read(struct net_device *dev, int phy_id, int location);
290 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val);
291 static void epic_restart(struct net_device *dev);
292 static void epic_timer(unsigned long data);
293 static void epic_tx_timeout(struct net_device *dev);
294 static void epic_init_ring(struct net_device *dev);
295 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
296 static int epic_rx(struct net_device *dev, int budget);
297 static int epic_poll(struct net_device *dev, int *budget);
298 static irqreturn_t epic_interrupt(int irq, void *dev_instance);
299 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
300 static const struct ethtool_ops netdev_ethtool_ops;
301 static int epic_close(struct net_device *dev);
302 static struct net_device_stats *epic_get_stats(struct net_device *dev);
303 static void set_rx_mode(struct net_device *dev);
307 static int __devinit epic_init_one (struct pci_dev *pdev,
308 const struct pci_device_id *ent)
310 static int card_idx = -1;
312 int chip_idx = (int) ent->driver_data;
314 struct net_device *dev;
315 struct epic_private *ep;
316 int i, ret, option = 0, duplex = 0;
320 /* when built into the kernel, we only print version if device is found */
322 static int printed_version;
323 if (!printed_version++)
324 printk (KERN_INFO "%s" KERN_INFO "%s",
330 ret = pci_enable_device(pdev);
335 if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) {
336 dev_err(&pdev->dev, "no PCI region space\n");
338 goto err_out_disable;
341 pci_set_master(pdev);
343 ret = pci_request_regions(pdev, DRV_NAME);
345 goto err_out_disable;
349 dev = alloc_etherdev(sizeof (*ep));
351 dev_err(&pdev->dev, "no memory for eth device\n");
352 goto err_out_free_res;
354 SET_MODULE_OWNER(dev);
355 SET_NETDEV_DEV(dev, &pdev->dev);
358 ioaddr = pci_resource_start (pdev, 0);
360 ioaddr = pci_resource_start (pdev, 1);
361 ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1));
363 dev_err(&pdev->dev, "ioremap failed\n");
364 goto err_out_free_netdev;
368 pci_set_drvdata(pdev, dev);
371 ep->mii.mdio_read = mdio_read;
372 ep->mii.mdio_write = mdio_write;
373 ep->mii.phy_id_mask = 0x1f;
374 ep->mii.reg_num_mask = 0x1f;
376 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
378 goto err_out_iounmap;
379 ep->tx_ring = (struct epic_tx_desc *)ring_space;
380 ep->tx_ring_dma = ring_dma;
382 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
384 goto err_out_unmap_tx;
385 ep->rx_ring = (struct epic_rx_desc *)ring_space;
386 ep->rx_ring_dma = ring_dma;
388 if (dev->mem_start) {
389 option = dev->mem_start;
390 duplex = (dev->mem_start & 16) ? 1 : 0;
391 } else if (card_idx >= 0 && card_idx < MAX_UNITS) {
392 if (options[card_idx] >= 0)
393 option = options[card_idx];
394 if (full_duplex[card_idx] >= 0)
395 duplex = full_duplex[card_idx];
398 dev->base_addr = ioaddr;
401 spin_lock_init(&ep->lock);
402 spin_lock_init(&ep->napi_lock);
403 ep->reschedule_in_poll = 0;
405 /* Bring the chip out of low-power mode. */
406 outl(0x4200, ioaddr + GENCTL);
407 /* Magic?! If we don't set this bit the MII interface won't work. */
408 /* This magic is documented in SMSC app note 7.15 */
409 for (i = 16; i > 0; i--)
410 outl(0x0008, ioaddr + TEST1);
412 /* Turn on the MII transceiver. */
413 outl(0x12, ioaddr + MIICfg);
415 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
416 outl(0x0200, ioaddr + GENCTL);
418 /* Note: the '175 does not have a serial EEPROM. */
419 for (i = 0; i < 3; i++)
420 ((u16 *)dev->dev_addr)[i] = le16_to_cpu(inw(ioaddr + LAN0 + i*4));
423 dev_printk(KERN_DEBUG, &pdev->dev, "EEPROM contents:\n");
424 for (i = 0; i < 64; i++)
425 printk(" %4.4x%s", read_eeprom(ioaddr, i),
426 i % 16 == 15 ? "\n" : "");
430 ep->chip_id = chip_idx;
431 ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
433 (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
434 | CntFull | TxUnderrun | EpicNapiEvent;
436 /* Find the connected MII xcvrs.
437 Doing this in open() would allow detecting external xcvrs later, but
438 takes much time and no cards have external MII. */
440 int phy, phy_idx = 0;
441 for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) {
442 int mii_status = mdio_read(dev, phy, MII_BMSR);
443 if (mii_status != 0xffff && mii_status != 0x0000) {
444 ep->phys[phy_idx++] = phy;
446 "MII transceiver #%d control "
447 "%4.4x status %4.4x.\n",
448 phy, mdio_read(dev, phy, 0), mii_status);
451 ep->mii_phy_cnt = phy_idx;
454 ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE);
456 "Autonegotiation advertising %4.4x link "
458 ep->mii.advertising, mdio_read(dev, phy, 5));
459 } else if ( ! (ep->chip_flags & NO_MII)) {
461 "***WARNING***: No MII transceiver found!\n");
462 /* Use the known PHY address of the EPII. */
465 ep->mii.phy_id = ep->phys[0];
468 /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */
469 if (ep->chip_flags & MII_PWRDWN)
470 outl(inl(ioaddr + NVCTL) & ~0x483C, ioaddr + NVCTL);
471 outl(0x0008, ioaddr + GENCTL);
473 /* The lower four bits are the media type. */
475 ep->mii.force_media = ep->mii.full_duplex = 1;
476 dev_info(&pdev->dev, "Forced full duplex requested.\n");
478 dev->if_port = ep->default_port = option;
480 /* The Epic-specific entries in the device structure. */
481 dev->open = &epic_open;
482 dev->hard_start_xmit = &epic_start_xmit;
483 dev->stop = &epic_close;
484 dev->get_stats = &epic_get_stats;
485 dev->set_multicast_list = &set_rx_mode;
486 dev->do_ioctl = &netdev_ioctl;
487 dev->ethtool_ops = &netdev_ethtool_ops;
488 dev->watchdog_timeo = TX_TIMEOUT;
489 dev->tx_timeout = &epic_tx_timeout;
490 dev->poll = epic_poll;
493 ret = register_netdev(dev);
495 goto err_out_unmap_rx;
497 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ",
498 dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq);
499 for (i = 0; i < 5; i++)
500 printk("%2.2x:", dev->dev_addr[i]);
501 printk("%2.2x.\n", dev->dev_addr[i]);
507 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
509 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
517 pci_release_regions(pdev);
519 pci_disable_device(pdev);
523 /* Serial EEPROM section. */
525 /* EEPROM_Ctrl bits. */
526 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
527 #define EE_CS 0x02 /* EEPROM chip select. */
528 #define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */
529 #define EE_WRITE_0 0x01
530 #define EE_WRITE_1 0x09
531 #define EE_DATA_READ 0x10 /* EEPROM chip data out. */
532 #define EE_ENB (0x0001 | EE_CS)
534 /* Delay between EEPROM clock transitions.
535 This serves to flush the operation to the PCI bus.
538 #define eeprom_delay() inl(ee_addr)
540 /* The EEPROM commands include the alway-set leading bit. */
541 #define EE_WRITE_CMD (5 << 6)
542 #define EE_READ64_CMD (6 << 6)
543 #define EE_READ256_CMD (6 << 8)
544 #define EE_ERASE_CMD (7 << 6)
546 static void epic_disable_int(struct net_device *dev, struct epic_private *ep)
548 long ioaddr = dev->base_addr;
550 outl(0x00000000, ioaddr + INTMASK);
553 static inline void __epic_pci_commit(long ioaddr)
556 inl(ioaddr + INTMASK);
560 static inline void epic_napi_irq_off(struct net_device *dev,
561 struct epic_private *ep)
563 long ioaddr = dev->base_addr;
565 outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK);
566 __epic_pci_commit(ioaddr);
569 static inline void epic_napi_irq_on(struct net_device *dev,
570 struct epic_private *ep)
572 long ioaddr = dev->base_addr;
574 /* No need to commit possible posted write */
575 outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK);
578 static int __devinit read_eeprom(long ioaddr, int location)
582 long ee_addr = ioaddr + EECTL;
583 int read_cmd = location |
584 (inl(ee_addr) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD);
586 outl(EE_ENB & ~EE_CS, ee_addr);
587 outl(EE_ENB, ee_addr);
589 /* Shift the read command bits out. */
590 for (i = 12; i >= 0; i--) {
591 short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0;
592 outl(EE_ENB | dataval, ee_addr);
594 outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
597 outl(EE_ENB, ee_addr);
599 for (i = 16; i > 0; i--) {
600 outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
602 retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
603 outl(EE_ENB, ee_addr);
607 /* Terminate the EEPROM access. */
608 outl(EE_ENB & ~EE_CS, ee_addr);
613 #define MII_WRITEOP 2
614 static int mdio_read(struct net_device *dev, int phy_id, int location)
616 long ioaddr = dev->base_addr;
617 int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP;
620 outl(read_cmd, ioaddr + MIICtrl);
621 /* Typical operation takes 25 loops. */
622 for (i = 400; i > 0; i--) {
624 if ((inl(ioaddr + MIICtrl) & MII_READOP) == 0) {
625 /* Work around read failure bug. */
626 if (phy_id == 1 && location < 6
627 && inw(ioaddr + MIIData) == 0xffff) {
628 outl(read_cmd, ioaddr + MIICtrl);
631 return inw(ioaddr + MIIData);
637 static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
639 long ioaddr = dev->base_addr;
642 outw(value, ioaddr + MIIData);
643 outl((phy_id << 9) | (loc << 4) | MII_WRITEOP, ioaddr + MIICtrl);
644 for (i = 10000; i > 0; i--) {
646 if ((inl(ioaddr + MIICtrl) & MII_WRITEOP) == 0)
653 static int epic_open(struct net_device *dev)
655 struct epic_private *ep = dev->priv;
656 long ioaddr = dev->base_addr;
660 /* Soft reset the chip. */
661 outl(0x4001, ioaddr + GENCTL);
663 if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev)))
668 outl(0x4000, ioaddr + GENCTL);
669 /* This magic is documented in SMSC app note 7.15 */
670 for (i = 16; i > 0; i--)
671 outl(0x0008, ioaddr + TEST1);
673 /* Pull the chip out of low-power mode, enable interrupts, and set for
674 PCI read multiple. The MIIcfg setting and strange write order are
675 required by the details of which bits are reset and the transceiver
676 wiring on the Ositech CardBus card.
679 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
681 if (ep->chip_flags & MII_PWRDWN)
682 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
684 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
685 outl(0x4432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
686 inl(ioaddr + GENCTL);
687 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
689 outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
690 inl(ioaddr + GENCTL);
691 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
694 udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
696 for (i = 0; i < 3; i++)
697 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
699 ep->tx_threshold = TX_FIFO_THRESH;
700 outl(ep->tx_threshold, ioaddr + TxThresh);
702 if (media2miictl[dev->if_port & 15]) {
704 mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]);
705 if (dev->if_port == 1) {
707 printk(KERN_INFO "%s: Using the 10base2 transceiver, MII "
709 dev->name, mdio_read(dev, ep->phys[0], MII_BMSR));
712 int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA);
713 if (mii_lpa != 0xffff) {
714 if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL)
715 ep->mii.full_duplex = 1;
716 else if (! (mii_lpa & LPA_LPACK))
717 mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
719 printk(KERN_INFO "%s: Setting %s-duplex based on MII xcvr %d"
720 " register read of %4.4x.\n", dev->name,
721 ep->mii.full_duplex ? "full" : "half",
722 ep->phys[0], mii_lpa);
726 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
727 outl(ep->rx_ring_dma, ioaddr + PRxCDAR);
728 outl(ep->tx_ring_dma, ioaddr + PTxCDAR);
730 /* Start the chip's Rx process. */
732 outl(StartRx | RxQueued, ioaddr + COMMAND);
734 netif_start_queue(dev);
736 /* Enable interrupts by setting the interrupt mask. */
737 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
738 | CntFull | TxUnderrun
739 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
742 printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
744 dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL),
745 ep->mii.full_duplex ? "full" : "half");
747 /* Set the timer to switch to check for link beat and perhaps switch
748 to an alternate media type. */
749 init_timer(&ep->timer);
750 ep->timer.expires = jiffies + 3*HZ;
751 ep->timer.data = (unsigned long)dev;
752 ep->timer.function = &epic_timer; /* timer handler */
753 add_timer(&ep->timer);
758 /* Reset the chip to recover from a PCI transaction error.
759 This may occur at interrupt time. */
760 static void epic_pause(struct net_device *dev)
762 long ioaddr = dev->base_addr;
763 struct epic_private *ep = dev->priv;
765 netif_stop_queue (dev);
767 /* Disable interrupts by clearing the interrupt mask. */
768 outl(0x00000000, ioaddr + INTMASK);
769 /* Stop the chip's Tx and Rx DMA processes. */
770 outw(StopRx | StopTxDMA | StopRxDMA, ioaddr + COMMAND);
772 /* Update the error counts. */
773 if (inw(ioaddr + COMMAND) != 0xffff) {
774 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
775 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
776 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
779 /* Remove the packets on the Rx queue. */
780 epic_rx(dev, RX_RING_SIZE);
783 static void epic_restart(struct net_device *dev)
785 long ioaddr = dev->base_addr;
786 struct epic_private *ep = dev->priv;
789 /* Soft reset the chip. */
790 outl(0x4001, ioaddr + GENCTL);
792 printk(KERN_DEBUG "%s: Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n",
793 dev->name, ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx);
796 /* This magic is documented in SMSC app note 7.15 */
797 for (i = 16; i > 0; i--)
798 outl(0x0008, ioaddr + TEST1);
800 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
801 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
803 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
805 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
806 if (ep->chip_flags & MII_PWRDWN)
807 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
809 for (i = 0; i < 3; i++)
810 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
812 ep->tx_threshold = TX_FIFO_THRESH;
813 outl(ep->tx_threshold, ioaddr + TxThresh);
814 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
815 outl(ep->rx_ring_dma + (ep->cur_rx%RX_RING_SIZE)*
816 sizeof(struct epic_rx_desc), ioaddr + PRxCDAR);
817 outl(ep->tx_ring_dma + (ep->dirty_tx%TX_RING_SIZE)*
818 sizeof(struct epic_tx_desc), ioaddr + PTxCDAR);
820 /* Start the chip's Rx process. */
822 outl(StartRx | RxQueued, ioaddr + COMMAND);
824 /* Enable interrupts by setting the interrupt mask. */
825 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
826 | CntFull | TxUnderrun
827 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
829 printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x"
830 " interrupt %4.4x.\n",
831 dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL),
832 (int)inl(ioaddr + INTSTAT));
836 static void check_media(struct net_device *dev)
838 struct epic_private *ep = dev->priv;
839 long ioaddr = dev->base_addr;
840 int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0;
841 int negotiated = mii_lpa & ep->mii.advertising;
842 int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
844 if (ep->mii.force_media)
846 if (mii_lpa == 0xffff) /* Bogus read */
848 if (ep->mii.full_duplex != duplex) {
849 ep->mii.full_duplex = duplex;
850 printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link"
851 " partner capability of %4.4x.\n", dev->name,
852 ep->mii.full_duplex ? "full" : "half", ep->phys[0], mii_lpa);
853 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
857 static void epic_timer(unsigned long data)
859 struct net_device *dev = (struct net_device *)data;
860 struct epic_private *ep = dev->priv;
861 long ioaddr = dev->base_addr;
862 int next_tick = 5*HZ;
865 printk(KERN_DEBUG "%s: Media monitor tick, Tx status %8.8x.\n",
866 dev->name, (int)inl(ioaddr + TxSTAT));
867 printk(KERN_DEBUG "%s: Other registers are IntMask %4.4x "
868 "IntStatus %4.4x RxStatus %4.4x.\n",
869 dev->name, (int)inl(ioaddr + INTMASK),
870 (int)inl(ioaddr + INTSTAT), (int)inl(ioaddr + RxSTAT));
875 ep->timer.expires = jiffies + next_tick;
876 add_timer(&ep->timer);
879 static void epic_tx_timeout(struct net_device *dev)
881 struct epic_private *ep = dev->priv;
882 long ioaddr = dev->base_addr;
885 printk(KERN_WARNING "%s: Transmit timeout using MII device, "
886 "Tx status %4.4x.\n",
887 dev->name, (int)inw(ioaddr + TxSTAT));
889 printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n",
890 dev->name, ep->dirty_tx, ep->cur_tx);
893 if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */
894 ep->stats.tx_fifo_errors++;
895 outl(RestartTx, ioaddr + COMMAND);
898 outl(TxQueued, dev->base_addr + COMMAND);
901 dev->trans_start = jiffies;
902 ep->stats.tx_errors++;
904 netif_wake_queue(dev);
907 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
908 static void epic_init_ring(struct net_device *dev)
910 struct epic_private *ep = dev->priv;
914 ep->dirty_tx = ep->cur_tx = 0;
915 ep->cur_rx = ep->dirty_rx = 0;
916 ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
918 /* Initialize all Rx descriptors. */
919 for (i = 0; i < RX_RING_SIZE; i++) {
920 ep->rx_ring[i].rxstatus = 0;
921 ep->rx_ring[i].buflength = cpu_to_le32(ep->rx_buf_sz);
922 ep->rx_ring[i].next = ep->rx_ring_dma +
923 (i+1)*sizeof(struct epic_rx_desc);
924 ep->rx_skbuff[i] = NULL;
926 /* Mark the last entry as wrapping the ring. */
927 ep->rx_ring[i-1].next = ep->rx_ring_dma;
929 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
930 for (i = 0; i < RX_RING_SIZE; i++) {
931 struct sk_buff *skb = dev_alloc_skb(ep->rx_buf_sz);
932 ep->rx_skbuff[i] = skb;
935 skb_reserve(skb, 2); /* 16 byte align the IP header. */
936 ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev,
937 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
938 ep->rx_ring[i].rxstatus = cpu_to_le32(DescOwn);
940 ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
942 /* The Tx buffer descriptor is filled in as needed, but we
943 do need to clear the ownership bit. */
944 for (i = 0; i < TX_RING_SIZE; i++) {
945 ep->tx_skbuff[i] = NULL;
946 ep->tx_ring[i].txstatus = 0x0000;
947 ep->tx_ring[i].next = ep->tx_ring_dma +
948 (i+1)*sizeof(struct epic_tx_desc);
950 ep->tx_ring[i-1].next = ep->tx_ring_dma;
954 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
956 struct epic_private *ep = dev->priv;
957 int entry, free_count;
961 if (skb_padto(skb, ETH_ZLEN))
964 /* Caution: the write order is important here, set the field with the
965 "ownership" bit last. */
967 /* Calculate the next Tx descriptor entry. */
968 spin_lock_irqsave(&ep->lock, flags);
969 free_count = ep->cur_tx - ep->dirty_tx;
970 entry = ep->cur_tx % TX_RING_SIZE;
972 ep->tx_skbuff[entry] = skb;
973 ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data,
974 skb->len, PCI_DMA_TODEVICE);
975 if (free_count < TX_QUEUE_LEN/2) {/* Typical path */
976 ctrl_word = cpu_to_le32(0x100000); /* No interrupt */
977 } else if (free_count == TX_QUEUE_LEN/2) {
978 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
979 } else if (free_count < TX_QUEUE_LEN - 1) {
980 ctrl_word = cpu_to_le32(0x100000); /* No Tx-done intr. */
982 /* Leave room for an additional entry. */
983 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
986 ep->tx_ring[entry].buflength = ctrl_word | cpu_to_le32(skb->len);
987 ep->tx_ring[entry].txstatus =
988 ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16)
989 | cpu_to_le32(DescOwn);
993 netif_stop_queue(dev);
995 spin_unlock_irqrestore(&ep->lock, flags);
996 /* Trigger an immediate transmit demand. */
997 outl(TxQueued, dev->base_addr + COMMAND);
999 dev->trans_start = jiffies;
1001 printk(KERN_DEBUG "%s: Queued Tx packet size %d to slot %d, "
1002 "flag %2.2x Tx status %8.8x.\n",
1003 dev->name, (int)skb->len, entry, ctrl_word,
1004 (int)inl(dev->base_addr + TxSTAT));
1009 static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
1012 struct net_device_stats *stats = &ep->stats;
1014 #ifndef final_version
1015 /* There was an major error, log it. */
1017 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1021 if (status & 0x1050)
1022 stats->tx_aborted_errors++;
1023 if (status & 0x0008)
1024 stats->tx_carrier_errors++;
1025 if (status & 0x0040)
1026 stats->tx_window_errors++;
1027 if (status & 0x0010)
1028 stats->tx_fifo_errors++;
1031 static void epic_tx(struct net_device *dev, struct epic_private *ep)
1033 unsigned int dirty_tx, cur_tx;
1036 * Note: if this lock becomes a problem we can narrow the locked
1037 * region at the cost of occasionally grabbing the lock more times.
1039 cur_tx = ep->cur_tx;
1040 for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
1041 struct sk_buff *skb;
1042 int entry = dirty_tx % TX_RING_SIZE;
1043 int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
1045 if (txstatus & DescOwn)
1046 break; /* It still hasn't been Txed */
1048 if (likely(txstatus & 0x0001)) {
1049 ep->stats.collisions += (txstatus >> 8) & 15;
1050 ep->stats.tx_packets++;
1051 ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
1053 epic_tx_error(dev, ep, txstatus);
1055 /* Free the original skb. */
1056 skb = ep->tx_skbuff[entry];
1057 pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
1058 skb->len, PCI_DMA_TODEVICE);
1059 dev_kfree_skb_irq(skb);
1060 ep->tx_skbuff[entry] = NULL;
1063 #ifndef final_version
1064 if (cur_tx - dirty_tx > TX_RING_SIZE) {
1066 "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1067 dev->name, dirty_tx, cur_tx, ep->tx_full);
1068 dirty_tx += TX_RING_SIZE;
1071 ep->dirty_tx = dirty_tx;
1072 if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
1073 /* The ring is no longer full, allow new TX entries. */
1075 netif_wake_queue(dev);
1079 /* The interrupt handler does all of the Rx thread work and cleans up
1080 after the Tx thread. */
1081 static irqreturn_t epic_interrupt(int irq, void *dev_instance)
1083 struct net_device *dev = dev_instance;
1084 struct epic_private *ep = dev->priv;
1085 long ioaddr = dev->base_addr;
1086 unsigned int handled = 0;
1089 status = inl(ioaddr + INTSTAT);
1090 /* Acknowledge all of the current interrupt sources ASAP. */
1091 outl(status & EpicNormalEvent, ioaddr + INTSTAT);
1094 printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
1095 "intstat=%#8.8x.\n", dev->name, status,
1096 (int)inl(ioaddr + INTSTAT));
1099 if ((status & IntrSummary) == 0)
1104 if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
1105 spin_lock(&ep->napi_lock);
1106 if (netif_rx_schedule_prep(dev)) {
1107 epic_napi_irq_off(dev, ep);
1108 __netif_rx_schedule(dev);
1110 ep->reschedule_in_poll++;
1111 spin_unlock(&ep->napi_lock);
1113 status &= ~EpicNapiEvent;
1115 /* Check uncommon events all at once. */
1116 if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
1117 if (status == EpicRemoved)
1120 /* Always update the error counts to avoid overhead later. */
1121 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1122 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1123 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1125 if (status & TxUnderrun) { /* Tx FIFO underflow. */
1126 ep->stats.tx_fifo_errors++;
1127 outl(ep->tx_threshold += 128, ioaddr + TxThresh);
1128 /* Restart the transmit process. */
1129 outl(RestartTx, ioaddr + COMMAND);
1131 if (status & PCIBusErr170) {
1132 printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n",
1137 /* Clear all error sources. */
1138 outl(status & 0x7f18, ioaddr + INTSTAT);
1143 printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n",
1147 return IRQ_RETVAL(handled);
1150 static int epic_rx(struct net_device *dev, int budget)
1152 struct epic_private *ep = dev->priv;
1153 int entry = ep->cur_rx % RX_RING_SIZE;
1154 int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx;
1158 printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
1159 ep->rx_ring[entry].rxstatus);
1161 if (rx_work_limit > budget)
1162 rx_work_limit = budget;
1164 /* If we own the next entry, it's a new packet. Send it up. */
1165 while ((ep->rx_ring[entry].rxstatus & cpu_to_le32(DescOwn)) == 0) {
1166 int status = le32_to_cpu(ep->rx_ring[entry].rxstatus);
1169 printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status);
1170 if (--rx_work_limit < 0)
1172 if (status & 0x2006) {
1174 printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n",
1176 if (status & 0x2000) {
1177 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1178 "multiple buffers, status %4.4x!\n", dev->name, status);
1179 ep->stats.rx_length_errors++;
1180 } else if (status & 0x0006)
1181 /* Rx Frame errors are counted in hardware. */
1182 ep->stats.rx_errors++;
1184 /* Malloc up new buffer, compatible with net-2e. */
1185 /* Omit the four octet CRC from the length. */
1186 short pkt_len = (status >> 16) - 4;
1187 struct sk_buff *skb;
1189 if (pkt_len > PKT_BUF_SZ - 4) {
1190 printk(KERN_ERR "%s: Oversized Ethernet frame, status %x "
1192 dev->name, status, pkt_len);
1195 /* Check if the packet is long enough to accept without copying
1196 to a minimally-sized skbuff. */
1197 if (pkt_len < rx_copybreak
1198 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1199 skb_reserve(skb, 2); /* 16 byte align the IP header */
1200 pci_dma_sync_single_for_cpu(ep->pci_dev,
1201 ep->rx_ring[entry].bufaddr,
1203 PCI_DMA_FROMDEVICE);
1204 eth_copy_and_sum(skb, ep->rx_skbuff[entry]->data, pkt_len, 0);
1205 skb_put(skb, pkt_len);
1206 pci_dma_sync_single_for_device(ep->pci_dev,
1207 ep->rx_ring[entry].bufaddr,
1209 PCI_DMA_FROMDEVICE);
1211 pci_unmap_single(ep->pci_dev,
1212 ep->rx_ring[entry].bufaddr,
1213 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1214 skb_put(skb = ep->rx_skbuff[entry], pkt_len);
1215 ep->rx_skbuff[entry] = NULL;
1217 skb->protocol = eth_type_trans(skb, dev);
1218 netif_receive_skb(skb);
1219 dev->last_rx = jiffies;
1220 ep->stats.rx_packets++;
1221 ep->stats.rx_bytes += pkt_len;
1224 entry = (++ep->cur_rx) % RX_RING_SIZE;
1227 /* Refill the Rx ring buffers. */
1228 for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) {
1229 entry = ep->dirty_rx % RX_RING_SIZE;
1230 if (ep->rx_skbuff[entry] == NULL) {
1231 struct sk_buff *skb;
1232 skb = ep->rx_skbuff[entry] = dev_alloc_skb(ep->rx_buf_sz);
1235 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1236 ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev,
1237 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1240 ep->rx_ring[entry].rxstatus = cpu_to_le32(DescOwn);
1245 static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
1247 long ioaddr = dev->base_addr;
1250 status = inl(ioaddr + INTSTAT);
1252 if (status == EpicRemoved)
1254 if (status & RxOverflow) /* Missed a Rx frame. */
1255 ep->stats.rx_errors++;
1256 if (status & (RxOverflow | RxFull))
1257 outw(RxQueued, ioaddr + COMMAND);
1260 static int epic_poll(struct net_device *dev, int *budget)
1262 struct epic_private *ep = dev->priv;
1263 int work_done = 0, orig_budget;
1264 long ioaddr = dev->base_addr;
1266 orig_budget = (*budget > dev->quota) ? dev->quota : *budget;
1272 work_done += epic_rx(dev, *budget);
1274 epic_rx_err(dev, ep);
1276 *budget -= work_done;
1277 dev->quota -= work_done;
1279 if (netif_running(dev) && (work_done < orig_budget)) {
1280 unsigned long flags;
1283 /* A bit baroque but it avoids a (space hungry) spin_unlock */
1285 spin_lock_irqsave(&ep->napi_lock, flags);
1287 more = ep->reschedule_in_poll;
1289 __netif_rx_complete(dev);
1290 outl(EpicNapiEvent, ioaddr + INTSTAT);
1291 epic_napi_irq_on(dev, ep);
1293 ep->reschedule_in_poll--;
1295 spin_unlock_irqrestore(&ep->napi_lock, flags);
1301 return (work_done >= orig_budget);
1304 static int epic_close(struct net_device *dev)
1306 long ioaddr = dev->base_addr;
1307 struct epic_private *ep = dev->priv;
1308 struct sk_buff *skb;
1311 netif_stop_queue(dev);
1314 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
1315 dev->name, (int)inl(ioaddr + INTSTAT));
1317 del_timer_sync(&ep->timer);
1319 epic_disable_int(dev, ep);
1321 free_irq(dev->irq, dev);
1325 /* Free all the skbuffs in the Rx queue. */
1326 for (i = 0; i < RX_RING_SIZE; i++) {
1327 skb = ep->rx_skbuff[i];
1328 ep->rx_skbuff[i] = NULL;
1329 ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */
1330 ep->rx_ring[i].buflength = 0;
1332 pci_unmap_single(ep->pci_dev, ep->rx_ring[i].bufaddr,
1333 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1336 ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */
1338 for (i = 0; i < TX_RING_SIZE; i++) {
1339 skb = ep->tx_skbuff[i];
1340 ep->tx_skbuff[i] = NULL;
1343 pci_unmap_single(ep->pci_dev, ep->tx_ring[i].bufaddr,
1344 skb->len, PCI_DMA_TODEVICE);
1348 /* Green! Leave the chip in low-power mode. */
1349 outl(0x0008, ioaddr + GENCTL);
1354 static struct net_device_stats *epic_get_stats(struct net_device *dev)
1356 struct epic_private *ep = dev->priv;
1357 long ioaddr = dev->base_addr;
1359 if (netif_running(dev)) {
1360 /* Update the error counts. */
1361 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1362 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1363 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1369 /* Set or clear the multicast filter for this adaptor.
1370 Note that we only use exclusion around actually queueing the
1371 new frame, not around filling ep->setup_frame. This is non-deterministic
1372 when re-entered but still correct. */
1374 static void set_rx_mode(struct net_device *dev)
1376 long ioaddr = dev->base_addr;
1377 struct epic_private *ep = dev->priv;
1378 unsigned char mc_filter[8]; /* Multicast hash filter */
1381 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1382 outl(0x002C, ioaddr + RxCtrl);
1383 /* Unconditionally log net taps. */
1384 memset(mc_filter, 0xff, sizeof(mc_filter));
1385 } else if ((dev->mc_count > 0) || (dev->flags & IFF_ALLMULTI)) {
1386 /* There is apparently a chip bug, so the multicast filter
1387 is never enabled. */
1388 /* Too many to filter perfectly -- accept all multicasts. */
1389 memset(mc_filter, 0xff, sizeof(mc_filter));
1390 outl(0x000C, ioaddr + RxCtrl);
1391 } else if (dev->mc_count == 0) {
1392 outl(0x0004, ioaddr + RxCtrl);
1394 } else { /* Never executed, for now. */
1395 struct dev_mc_list *mclist;
1397 memset(mc_filter, 0, sizeof(mc_filter));
1398 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1399 i++, mclist = mclist->next) {
1400 unsigned int bit_nr =
1401 ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f;
1402 mc_filter[bit_nr >> 3] |= (1 << bit_nr);
1405 /* ToDo: perhaps we need to stop the Tx and Rx process here? */
1406 if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) {
1407 for (i = 0; i < 4; i++)
1408 outw(((u16 *)mc_filter)[i], ioaddr + MC0 + i*4);
1409 memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter));
1414 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1416 struct epic_private *np = dev->priv;
1418 strcpy (info->driver, DRV_NAME);
1419 strcpy (info->version, DRV_VERSION);
1420 strcpy (info->bus_info, pci_name(np->pci_dev));
1423 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1425 struct epic_private *np = dev->priv;
1428 spin_lock_irq(&np->lock);
1429 rc = mii_ethtool_gset(&np->mii, cmd);
1430 spin_unlock_irq(&np->lock);
1435 static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1437 struct epic_private *np = dev->priv;
1440 spin_lock_irq(&np->lock);
1441 rc = mii_ethtool_sset(&np->mii, cmd);
1442 spin_unlock_irq(&np->lock);
1447 static int netdev_nway_reset(struct net_device *dev)
1449 struct epic_private *np = dev->priv;
1450 return mii_nway_restart(&np->mii);
1453 static u32 netdev_get_link(struct net_device *dev)
1455 struct epic_private *np = dev->priv;
1456 return mii_link_ok(&np->mii);
1459 static u32 netdev_get_msglevel(struct net_device *dev)
1464 static void netdev_set_msglevel(struct net_device *dev, u32 value)
1469 static int ethtool_begin(struct net_device *dev)
1471 unsigned long ioaddr = dev->base_addr;
1472 /* power-up, if interface is down */
1473 if (! netif_running(dev)) {
1474 outl(0x0200, ioaddr + GENCTL);
1475 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1480 static void ethtool_complete(struct net_device *dev)
1482 unsigned long ioaddr = dev->base_addr;
1483 /* power-down, if interface is down */
1484 if (! netif_running(dev)) {
1485 outl(0x0008, ioaddr + GENCTL);
1486 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1490 static const struct ethtool_ops netdev_ethtool_ops = {
1491 .get_drvinfo = netdev_get_drvinfo,
1492 .get_settings = netdev_get_settings,
1493 .set_settings = netdev_set_settings,
1494 .nway_reset = netdev_nway_reset,
1495 .get_link = netdev_get_link,
1496 .get_msglevel = netdev_get_msglevel,
1497 .set_msglevel = netdev_set_msglevel,
1498 .get_sg = ethtool_op_get_sg,
1499 .get_tx_csum = ethtool_op_get_tx_csum,
1500 .begin = ethtool_begin,
1501 .complete = ethtool_complete
1504 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1506 struct epic_private *np = dev->priv;
1507 long ioaddr = dev->base_addr;
1508 struct mii_ioctl_data *data = if_mii(rq);
1511 /* power-up, if interface is down */
1512 if (! netif_running(dev)) {
1513 outl(0x0200, ioaddr + GENCTL);
1514 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1517 /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */
1518 spin_lock_irq(&np->lock);
1519 rc = generic_mii_ioctl(&np->mii, data, cmd, NULL);
1520 spin_unlock_irq(&np->lock);
1522 /* power-down, if interface is down */
1523 if (! netif_running(dev)) {
1524 outl(0x0008, ioaddr + GENCTL);
1525 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1531 static void __devexit epic_remove_one (struct pci_dev *pdev)
1533 struct net_device *dev = pci_get_drvdata(pdev);
1534 struct epic_private *ep = dev->priv;
1536 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
1537 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
1538 unregister_netdev(dev);
1540 iounmap((void*) dev->base_addr);
1542 pci_release_regions(pdev);
1544 pci_disable_device(pdev);
1545 pci_set_drvdata(pdev, NULL);
1546 /* pci_power_off(pdev, -1); */
1552 static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
1554 struct net_device *dev = pci_get_drvdata(pdev);
1555 long ioaddr = dev->base_addr;
1557 if (!netif_running(dev))
1560 /* Put the chip into low-power mode. */
1561 outl(0x0008, ioaddr + GENCTL);
1562 /* pci_power_off(pdev, -1); */
1567 static int epic_resume (struct pci_dev *pdev)
1569 struct net_device *dev = pci_get_drvdata(pdev);
1571 if (!netif_running(dev))
1574 /* pci_power_on(pdev); */
1578 #endif /* CONFIG_PM */
1581 static struct pci_driver epic_driver = {
1583 .id_table = epic_pci_tbl,
1584 .probe = epic_init_one,
1585 .remove = __devexit_p(epic_remove_one),
1587 .suspend = epic_suspend,
1588 .resume = epic_resume,
1589 #endif /* CONFIG_PM */
1593 static int __init epic_init (void)
1595 /* when a module, this is printed whether or not devices are found in probe */
1597 printk (KERN_INFO "%s" KERN_INFO "%s",
1601 return pci_register_driver(&epic_driver);
1605 static void __exit epic_cleanup (void)
1607 pci_unregister_driver (&epic_driver);
1611 module_init(epic_init);
1612 module_exit(epic_cleanup);