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 struct napi_struct napi;
266 unsigned int reschedule_in_poll;
267 unsigned int cur_tx, dirty_tx;
269 unsigned int cur_rx, dirty_rx;
271 unsigned int rx_buf_sz; /* Based on MTU+slack. */
273 struct pci_dev *pci_dev; /* PCI bus location. */
274 int chip_id, chip_flags;
276 struct net_device_stats stats;
277 struct timer_list timer; /* Media selection timer. */
279 unsigned char mc_filter[8];
280 signed char phys[4]; /* MII device addresses. */
281 u16 advertising; /* NWay media advertisement */
283 struct mii_if_info mii;
284 unsigned int tx_full:1; /* The Tx queue is full. */
285 unsigned int default_port:4; /* Last dev->if_port value. */
288 static int epic_open(struct net_device *dev);
289 static int read_eeprom(long ioaddr, int location);
290 static int mdio_read(struct net_device *dev, int phy_id, int location);
291 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val);
292 static void epic_restart(struct net_device *dev);
293 static void epic_timer(unsigned long data);
294 static void epic_tx_timeout(struct net_device *dev);
295 static void epic_init_ring(struct net_device *dev);
296 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
297 static int epic_rx(struct net_device *dev, int budget);
298 static int epic_poll(struct napi_struct *napi, int budget);
299 static irqreturn_t epic_interrupt(int irq, void *dev_instance);
300 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
301 static const struct ethtool_ops netdev_ethtool_ops;
302 static int epic_close(struct net_device *dev);
303 static struct net_device_stats *epic_get_stats(struct net_device *dev);
304 static void set_rx_mode(struct net_device *dev);
308 static int __devinit epic_init_one (struct pci_dev *pdev,
309 const struct pci_device_id *ent)
311 static int card_idx = -1;
313 int chip_idx = (int) ent->driver_data;
315 struct net_device *dev;
316 struct epic_private *ep;
317 int i, ret, option = 0, duplex = 0;
321 /* when built into the kernel, we only print version if device is found */
323 static int printed_version;
324 if (!printed_version++)
325 printk (KERN_INFO "%s" KERN_INFO "%s",
331 ret = pci_enable_device(pdev);
336 if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) {
337 dev_err(&pdev->dev, "no PCI region space\n");
339 goto err_out_disable;
342 pci_set_master(pdev);
344 ret = pci_request_regions(pdev, DRV_NAME);
346 goto err_out_disable;
350 dev = alloc_etherdev(sizeof (*ep));
352 dev_err(&pdev->dev, "no memory for eth device\n");
353 goto err_out_free_res;
355 SET_MODULE_OWNER(dev);
356 SET_NETDEV_DEV(dev, &pdev->dev);
359 ioaddr = pci_resource_start (pdev, 0);
361 ioaddr = pci_resource_start (pdev, 1);
362 ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1));
364 dev_err(&pdev->dev, "ioremap failed\n");
365 goto err_out_free_netdev;
369 pci_set_drvdata(pdev, dev);
372 ep->mii.mdio_read = mdio_read;
373 ep->mii.mdio_write = mdio_write;
374 ep->mii.phy_id_mask = 0x1f;
375 ep->mii.reg_num_mask = 0x1f;
377 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
379 goto err_out_iounmap;
380 ep->tx_ring = (struct epic_tx_desc *)ring_space;
381 ep->tx_ring_dma = ring_dma;
383 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
385 goto err_out_unmap_tx;
386 ep->rx_ring = (struct epic_rx_desc *)ring_space;
387 ep->rx_ring_dma = ring_dma;
389 if (dev->mem_start) {
390 option = dev->mem_start;
391 duplex = (dev->mem_start & 16) ? 1 : 0;
392 } else if (card_idx >= 0 && card_idx < MAX_UNITS) {
393 if (options[card_idx] >= 0)
394 option = options[card_idx];
395 if (full_duplex[card_idx] >= 0)
396 duplex = full_duplex[card_idx];
399 dev->base_addr = ioaddr;
402 spin_lock_init(&ep->lock);
403 spin_lock_init(&ep->napi_lock);
404 ep->reschedule_in_poll = 0;
406 /* Bring the chip out of low-power mode. */
407 outl(0x4200, ioaddr + GENCTL);
408 /* Magic?! If we don't set this bit the MII interface won't work. */
409 /* This magic is documented in SMSC app note 7.15 */
410 for (i = 16; i > 0; i--)
411 outl(0x0008, ioaddr + TEST1);
413 /* Turn on the MII transceiver. */
414 outl(0x12, ioaddr + MIICfg);
416 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
417 outl(0x0200, ioaddr + GENCTL);
419 /* Note: the '175 does not have a serial EEPROM. */
420 for (i = 0; i < 3; i++)
421 ((u16 *)dev->dev_addr)[i] = le16_to_cpu(inw(ioaddr + LAN0 + i*4));
424 dev_printk(KERN_DEBUG, &pdev->dev, "EEPROM contents:\n");
425 for (i = 0; i < 64; i++)
426 printk(" %4.4x%s", read_eeprom(ioaddr, i),
427 i % 16 == 15 ? "\n" : "");
431 ep->chip_id = chip_idx;
432 ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
434 (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
435 | CntFull | TxUnderrun | EpicNapiEvent;
437 /* Find the connected MII xcvrs.
438 Doing this in open() would allow detecting external xcvrs later, but
439 takes much time and no cards have external MII. */
441 int phy, phy_idx = 0;
442 for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) {
443 int mii_status = mdio_read(dev, phy, MII_BMSR);
444 if (mii_status != 0xffff && mii_status != 0x0000) {
445 ep->phys[phy_idx++] = phy;
447 "MII transceiver #%d control "
448 "%4.4x status %4.4x.\n",
449 phy, mdio_read(dev, phy, 0), mii_status);
452 ep->mii_phy_cnt = phy_idx;
455 ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE);
457 "Autonegotiation advertising %4.4x link "
459 ep->mii.advertising, mdio_read(dev, phy, 5));
460 } else if ( ! (ep->chip_flags & NO_MII)) {
462 "***WARNING***: No MII transceiver found!\n");
463 /* Use the known PHY address of the EPII. */
466 ep->mii.phy_id = ep->phys[0];
469 /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */
470 if (ep->chip_flags & MII_PWRDWN)
471 outl(inl(ioaddr + NVCTL) & ~0x483C, ioaddr + NVCTL);
472 outl(0x0008, ioaddr + GENCTL);
474 /* The lower four bits are the media type. */
476 ep->mii.force_media = ep->mii.full_duplex = 1;
477 dev_info(&pdev->dev, "Forced full duplex requested.\n");
479 dev->if_port = ep->default_port = option;
481 /* The Epic-specific entries in the device structure. */
482 dev->open = &epic_open;
483 dev->hard_start_xmit = &epic_start_xmit;
484 dev->stop = &epic_close;
485 dev->get_stats = &epic_get_stats;
486 dev->set_multicast_list = &set_rx_mode;
487 dev->do_ioctl = &netdev_ioctl;
488 dev->ethtool_ops = &netdev_ethtool_ops;
489 dev->watchdog_timeo = TX_TIMEOUT;
490 dev->tx_timeout = &epic_tx_timeout;
491 netif_napi_add(dev, &ep->napi, epic_poll, 64);
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 napi_enable(&ep->napi);
664 if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev))) {
665 napi_disable(&ep->napi);
671 outl(0x4000, ioaddr + GENCTL);
672 /* This magic is documented in SMSC app note 7.15 */
673 for (i = 16; i > 0; i--)
674 outl(0x0008, ioaddr + TEST1);
676 /* Pull the chip out of low-power mode, enable interrupts, and set for
677 PCI read multiple. The MIIcfg setting and strange write order are
678 required by the details of which bits are reset and the transceiver
679 wiring on the Ositech CardBus card.
682 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
684 if (ep->chip_flags & MII_PWRDWN)
685 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
687 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
688 outl(0x4432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
689 inl(ioaddr + GENCTL);
690 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
692 outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
693 inl(ioaddr + GENCTL);
694 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
697 udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
699 for (i = 0; i < 3; i++)
700 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
702 ep->tx_threshold = TX_FIFO_THRESH;
703 outl(ep->tx_threshold, ioaddr + TxThresh);
705 if (media2miictl[dev->if_port & 15]) {
707 mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]);
708 if (dev->if_port == 1) {
710 printk(KERN_INFO "%s: Using the 10base2 transceiver, MII "
712 dev->name, mdio_read(dev, ep->phys[0], MII_BMSR));
715 int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA);
716 if (mii_lpa != 0xffff) {
717 if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL)
718 ep->mii.full_duplex = 1;
719 else if (! (mii_lpa & LPA_LPACK))
720 mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
722 printk(KERN_INFO "%s: Setting %s-duplex based on MII xcvr %d"
723 " register read of %4.4x.\n", dev->name,
724 ep->mii.full_duplex ? "full" : "half",
725 ep->phys[0], mii_lpa);
729 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
730 outl(ep->rx_ring_dma, ioaddr + PRxCDAR);
731 outl(ep->tx_ring_dma, ioaddr + PTxCDAR);
733 /* Start the chip's Rx process. */
735 outl(StartRx | RxQueued, ioaddr + COMMAND);
737 netif_start_queue(dev);
739 /* Enable interrupts by setting the interrupt mask. */
740 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
741 | CntFull | TxUnderrun
742 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
745 printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
747 dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL),
748 ep->mii.full_duplex ? "full" : "half");
750 /* Set the timer to switch to check for link beat and perhaps switch
751 to an alternate media type. */
752 init_timer(&ep->timer);
753 ep->timer.expires = jiffies + 3*HZ;
754 ep->timer.data = (unsigned long)dev;
755 ep->timer.function = &epic_timer; /* timer handler */
756 add_timer(&ep->timer);
761 /* Reset the chip to recover from a PCI transaction error.
762 This may occur at interrupt time. */
763 static void epic_pause(struct net_device *dev)
765 long ioaddr = dev->base_addr;
766 struct epic_private *ep = dev->priv;
768 netif_stop_queue (dev);
770 /* Disable interrupts by clearing the interrupt mask. */
771 outl(0x00000000, ioaddr + INTMASK);
772 /* Stop the chip's Tx and Rx DMA processes. */
773 outw(StopRx | StopTxDMA | StopRxDMA, ioaddr + COMMAND);
775 /* Update the error counts. */
776 if (inw(ioaddr + COMMAND) != 0xffff) {
777 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
778 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
779 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
782 /* Remove the packets on the Rx queue. */
783 epic_rx(dev, RX_RING_SIZE);
786 static void epic_restart(struct net_device *dev)
788 long ioaddr = dev->base_addr;
789 struct epic_private *ep = dev->priv;
792 /* Soft reset the chip. */
793 outl(0x4001, ioaddr + GENCTL);
795 printk(KERN_DEBUG "%s: Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n",
796 dev->name, ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx);
799 /* This magic is documented in SMSC app note 7.15 */
800 for (i = 16; i > 0; i--)
801 outl(0x0008, ioaddr + TEST1);
803 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
804 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
806 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
808 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
809 if (ep->chip_flags & MII_PWRDWN)
810 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
812 for (i = 0; i < 3; i++)
813 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
815 ep->tx_threshold = TX_FIFO_THRESH;
816 outl(ep->tx_threshold, ioaddr + TxThresh);
817 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
818 outl(ep->rx_ring_dma + (ep->cur_rx%RX_RING_SIZE)*
819 sizeof(struct epic_rx_desc), ioaddr + PRxCDAR);
820 outl(ep->tx_ring_dma + (ep->dirty_tx%TX_RING_SIZE)*
821 sizeof(struct epic_tx_desc), ioaddr + PTxCDAR);
823 /* Start the chip's Rx process. */
825 outl(StartRx | RxQueued, ioaddr + COMMAND);
827 /* Enable interrupts by setting the interrupt mask. */
828 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
829 | CntFull | TxUnderrun
830 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
832 printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x"
833 " interrupt %4.4x.\n",
834 dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL),
835 (int)inl(ioaddr + INTSTAT));
839 static void check_media(struct net_device *dev)
841 struct epic_private *ep = dev->priv;
842 long ioaddr = dev->base_addr;
843 int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0;
844 int negotiated = mii_lpa & ep->mii.advertising;
845 int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
847 if (ep->mii.force_media)
849 if (mii_lpa == 0xffff) /* Bogus read */
851 if (ep->mii.full_duplex != duplex) {
852 ep->mii.full_duplex = duplex;
853 printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link"
854 " partner capability of %4.4x.\n", dev->name,
855 ep->mii.full_duplex ? "full" : "half", ep->phys[0], mii_lpa);
856 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
860 static void epic_timer(unsigned long data)
862 struct net_device *dev = (struct net_device *)data;
863 struct epic_private *ep = dev->priv;
864 long ioaddr = dev->base_addr;
865 int next_tick = 5*HZ;
868 printk(KERN_DEBUG "%s: Media monitor tick, Tx status %8.8x.\n",
869 dev->name, (int)inl(ioaddr + TxSTAT));
870 printk(KERN_DEBUG "%s: Other registers are IntMask %4.4x "
871 "IntStatus %4.4x RxStatus %4.4x.\n",
872 dev->name, (int)inl(ioaddr + INTMASK),
873 (int)inl(ioaddr + INTSTAT), (int)inl(ioaddr + RxSTAT));
878 ep->timer.expires = jiffies + next_tick;
879 add_timer(&ep->timer);
882 static void epic_tx_timeout(struct net_device *dev)
884 struct epic_private *ep = dev->priv;
885 long ioaddr = dev->base_addr;
888 printk(KERN_WARNING "%s: Transmit timeout using MII device, "
889 "Tx status %4.4x.\n",
890 dev->name, (int)inw(ioaddr + TxSTAT));
892 printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n",
893 dev->name, ep->dirty_tx, ep->cur_tx);
896 if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */
897 ep->stats.tx_fifo_errors++;
898 outl(RestartTx, ioaddr + COMMAND);
901 outl(TxQueued, dev->base_addr + COMMAND);
904 dev->trans_start = jiffies;
905 ep->stats.tx_errors++;
907 netif_wake_queue(dev);
910 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
911 static void epic_init_ring(struct net_device *dev)
913 struct epic_private *ep = dev->priv;
917 ep->dirty_tx = ep->cur_tx = 0;
918 ep->cur_rx = ep->dirty_rx = 0;
919 ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
921 /* Initialize all Rx descriptors. */
922 for (i = 0; i < RX_RING_SIZE; i++) {
923 ep->rx_ring[i].rxstatus = 0;
924 ep->rx_ring[i].buflength = cpu_to_le32(ep->rx_buf_sz);
925 ep->rx_ring[i].next = ep->rx_ring_dma +
926 (i+1)*sizeof(struct epic_rx_desc);
927 ep->rx_skbuff[i] = NULL;
929 /* Mark the last entry as wrapping the ring. */
930 ep->rx_ring[i-1].next = ep->rx_ring_dma;
932 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
933 for (i = 0; i < RX_RING_SIZE; i++) {
934 struct sk_buff *skb = dev_alloc_skb(ep->rx_buf_sz);
935 ep->rx_skbuff[i] = skb;
938 skb_reserve(skb, 2); /* 16 byte align the IP header. */
939 ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev,
940 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
941 ep->rx_ring[i].rxstatus = cpu_to_le32(DescOwn);
943 ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
945 /* The Tx buffer descriptor is filled in as needed, but we
946 do need to clear the ownership bit. */
947 for (i = 0; i < TX_RING_SIZE; i++) {
948 ep->tx_skbuff[i] = NULL;
949 ep->tx_ring[i].txstatus = 0x0000;
950 ep->tx_ring[i].next = ep->tx_ring_dma +
951 (i+1)*sizeof(struct epic_tx_desc);
953 ep->tx_ring[i-1].next = ep->tx_ring_dma;
957 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
959 struct epic_private *ep = dev->priv;
960 int entry, free_count;
964 if (skb_padto(skb, ETH_ZLEN))
967 /* Caution: the write order is important here, set the field with the
968 "ownership" bit last. */
970 /* Calculate the next Tx descriptor entry. */
971 spin_lock_irqsave(&ep->lock, flags);
972 free_count = ep->cur_tx - ep->dirty_tx;
973 entry = ep->cur_tx % TX_RING_SIZE;
975 ep->tx_skbuff[entry] = skb;
976 ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data,
977 skb->len, PCI_DMA_TODEVICE);
978 if (free_count < TX_QUEUE_LEN/2) {/* Typical path */
979 ctrl_word = cpu_to_le32(0x100000); /* No interrupt */
980 } else if (free_count == TX_QUEUE_LEN/2) {
981 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
982 } else if (free_count < TX_QUEUE_LEN - 1) {
983 ctrl_word = cpu_to_le32(0x100000); /* No Tx-done intr. */
985 /* Leave room for an additional entry. */
986 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
989 ep->tx_ring[entry].buflength = ctrl_word | cpu_to_le32(skb->len);
990 ep->tx_ring[entry].txstatus =
991 ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16)
992 | cpu_to_le32(DescOwn);
996 netif_stop_queue(dev);
998 spin_unlock_irqrestore(&ep->lock, flags);
999 /* Trigger an immediate transmit demand. */
1000 outl(TxQueued, dev->base_addr + COMMAND);
1002 dev->trans_start = jiffies;
1004 printk(KERN_DEBUG "%s: Queued Tx packet size %d to slot %d, "
1005 "flag %2.2x Tx status %8.8x.\n",
1006 dev->name, (int)skb->len, entry, ctrl_word,
1007 (int)inl(dev->base_addr + TxSTAT));
1012 static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
1015 struct net_device_stats *stats = &ep->stats;
1017 #ifndef final_version
1018 /* There was an major error, log it. */
1020 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1024 if (status & 0x1050)
1025 stats->tx_aborted_errors++;
1026 if (status & 0x0008)
1027 stats->tx_carrier_errors++;
1028 if (status & 0x0040)
1029 stats->tx_window_errors++;
1030 if (status & 0x0010)
1031 stats->tx_fifo_errors++;
1034 static void epic_tx(struct net_device *dev, struct epic_private *ep)
1036 unsigned int dirty_tx, cur_tx;
1039 * Note: if this lock becomes a problem we can narrow the locked
1040 * region at the cost of occasionally grabbing the lock more times.
1042 cur_tx = ep->cur_tx;
1043 for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
1044 struct sk_buff *skb;
1045 int entry = dirty_tx % TX_RING_SIZE;
1046 int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
1048 if (txstatus & DescOwn)
1049 break; /* It still hasn't been Txed */
1051 if (likely(txstatus & 0x0001)) {
1052 ep->stats.collisions += (txstatus >> 8) & 15;
1053 ep->stats.tx_packets++;
1054 ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
1056 epic_tx_error(dev, ep, txstatus);
1058 /* Free the original skb. */
1059 skb = ep->tx_skbuff[entry];
1060 pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
1061 skb->len, PCI_DMA_TODEVICE);
1062 dev_kfree_skb_irq(skb);
1063 ep->tx_skbuff[entry] = NULL;
1066 #ifndef final_version
1067 if (cur_tx - dirty_tx > TX_RING_SIZE) {
1069 "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1070 dev->name, dirty_tx, cur_tx, ep->tx_full);
1071 dirty_tx += TX_RING_SIZE;
1074 ep->dirty_tx = dirty_tx;
1075 if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
1076 /* The ring is no longer full, allow new TX entries. */
1078 netif_wake_queue(dev);
1082 /* The interrupt handler does all of the Rx thread work and cleans up
1083 after the Tx thread. */
1084 static irqreturn_t epic_interrupt(int irq, void *dev_instance)
1086 struct net_device *dev = dev_instance;
1087 struct epic_private *ep = dev->priv;
1088 long ioaddr = dev->base_addr;
1089 unsigned int handled = 0;
1092 status = inl(ioaddr + INTSTAT);
1093 /* Acknowledge all of the current interrupt sources ASAP. */
1094 outl(status & EpicNormalEvent, ioaddr + INTSTAT);
1097 printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
1098 "intstat=%#8.8x.\n", dev->name, status,
1099 (int)inl(ioaddr + INTSTAT));
1102 if ((status & IntrSummary) == 0)
1107 if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
1108 spin_lock(&ep->napi_lock);
1109 if (netif_rx_schedule_prep(dev, &ep->napi)) {
1110 epic_napi_irq_off(dev, ep);
1111 __netif_rx_schedule(dev, &ep->napi);
1113 ep->reschedule_in_poll++;
1114 spin_unlock(&ep->napi_lock);
1116 status &= ~EpicNapiEvent;
1118 /* Check uncommon events all at once. */
1119 if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
1120 if (status == EpicRemoved)
1123 /* Always update the error counts to avoid overhead later. */
1124 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1125 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1126 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1128 if (status & TxUnderrun) { /* Tx FIFO underflow. */
1129 ep->stats.tx_fifo_errors++;
1130 outl(ep->tx_threshold += 128, ioaddr + TxThresh);
1131 /* Restart the transmit process. */
1132 outl(RestartTx, ioaddr + COMMAND);
1134 if (status & PCIBusErr170) {
1135 printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n",
1140 /* Clear all error sources. */
1141 outl(status & 0x7f18, ioaddr + INTSTAT);
1146 printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n",
1150 return IRQ_RETVAL(handled);
1153 static int epic_rx(struct net_device *dev, int budget)
1155 struct epic_private *ep = dev->priv;
1156 int entry = ep->cur_rx % RX_RING_SIZE;
1157 int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx;
1161 printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
1162 ep->rx_ring[entry].rxstatus);
1164 if (rx_work_limit > budget)
1165 rx_work_limit = budget;
1167 /* If we own the next entry, it's a new packet. Send it up. */
1168 while ((ep->rx_ring[entry].rxstatus & cpu_to_le32(DescOwn)) == 0) {
1169 int status = le32_to_cpu(ep->rx_ring[entry].rxstatus);
1172 printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status);
1173 if (--rx_work_limit < 0)
1175 if (status & 0x2006) {
1177 printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n",
1179 if (status & 0x2000) {
1180 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1181 "multiple buffers, status %4.4x!\n", dev->name, status);
1182 ep->stats.rx_length_errors++;
1183 } else if (status & 0x0006)
1184 /* Rx Frame errors are counted in hardware. */
1185 ep->stats.rx_errors++;
1187 /* Malloc up new buffer, compatible with net-2e. */
1188 /* Omit the four octet CRC from the length. */
1189 short pkt_len = (status >> 16) - 4;
1190 struct sk_buff *skb;
1192 if (pkt_len > PKT_BUF_SZ - 4) {
1193 printk(KERN_ERR "%s: Oversized Ethernet frame, status %x "
1195 dev->name, status, pkt_len);
1198 /* Check if the packet is long enough to accept without copying
1199 to a minimally-sized skbuff. */
1200 if (pkt_len < rx_copybreak
1201 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1202 skb_reserve(skb, 2); /* 16 byte align the IP header */
1203 pci_dma_sync_single_for_cpu(ep->pci_dev,
1204 ep->rx_ring[entry].bufaddr,
1206 PCI_DMA_FROMDEVICE);
1207 skb_copy_to_linear_data(skb, ep->rx_skbuff[entry]->data, pkt_len);
1208 skb_put(skb, pkt_len);
1209 pci_dma_sync_single_for_device(ep->pci_dev,
1210 ep->rx_ring[entry].bufaddr,
1212 PCI_DMA_FROMDEVICE);
1214 pci_unmap_single(ep->pci_dev,
1215 ep->rx_ring[entry].bufaddr,
1216 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1217 skb_put(skb = ep->rx_skbuff[entry], pkt_len);
1218 ep->rx_skbuff[entry] = NULL;
1220 skb->protocol = eth_type_trans(skb, dev);
1221 netif_receive_skb(skb);
1222 dev->last_rx = jiffies;
1223 ep->stats.rx_packets++;
1224 ep->stats.rx_bytes += pkt_len;
1227 entry = (++ep->cur_rx) % RX_RING_SIZE;
1230 /* Refill the Rx ring buffers. */
1231 for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) {
1232 entry = ep->dirty_rx % RX_RING_SIZE;
1233 if (ep->rx_skbuff[entry] == NULL) {
1234 struct sk_buff *skb;
1235 skb = ep->rx_skbuff[entry] = dev_alloc_skb(ep->rx_buf_sz);
1238 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1239 ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev,
1240 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1243 ep->rx_ring[entry].rxstatus = cpu_to_le32(DescOwn);
1248 static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
1250 long ioaddr = dev->base_addr;
1253 status = inl(ioaddr + INTSTAT);
1255 if (status == EpicRemoved)
1257 if (status & RxOverflow) /* Missed a Rx frame. */
1258 ep->stats.rx_errors++;
1259 if (status & (RxOverflow | RxFull))
1260 outw(RxQueued, ioaddr + COMMAND);
1263 static int epic_poll(struct napi_struct *napi, int budget)
1265 struct epic_private *ep = container_of(napi, struct epic_private, napi);
1266 struct net_device *dev = ep->mii.dev;
1268 long ioaddr = dev->base_addr;
1274 work_done += epic_rx(dev, budget);
1276 epic_rx_err(dev, ep);
1278 if (netif_running(dev) && (work_done < budget)) {
1279 unsigned long flags;
1282 /* A bit baroque but it avoids a (space hungry) spin_unlock */
1284 spin_lock_irqsave(&ep->napi_lock, flags);
1286 more = ep->reschedule_in_poll;
1288 __netif_rx_complete(dev, napi);
1289 outl(EpicNapiEvent, ioaddr + INTSTAT);
1290 epic_napi_irq_on(dev, ep);
1292 ep->reschedule_in_poll--;
1294 spin_unlock_irqrestore(&ep->napi_lock, flags);
1303 static int epic_close(struct net_device *dev)
1305 long ioaddr = dev->base_addr;
1306 struct epic_private *ep = dev->priv;
1307 struct sk_buff *skb;
1310 netif_stop_queue(dev);
1311 napi_disable(&ep->napi);
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);