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 " http://www.scyld.com/network/epic100.html\n";
97 static char version3[] __devinitdata =
98 " (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n";
100 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
101 MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver");
102 MODULE_LICENSE("GPL");
104 module_param(debug, int, 0);
105 module_param(rx_copybreak, int, 0);
106 module_param_array(options, int, NULL, 0);
107 module_param_array(full_duplex, int, NULL, 0);
108 MODULE_PARM_DESC(debug, "EPIC/100 debug level (0-5)");
109 MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex");
110 MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames");
111 MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)");
116 I. Board Compatibility
118 This device driver is designed for the SMC "EPIC/100", the SMC
119 single-chip Ethernet controllers for PCI. This chip is used on
120 the SMC EtherPower II boards.
122 II. Board-specific settings
124 PCI bus devices are configured by the system at boot time, so no jumpers
125 need to be set on the board. The system BIOS will assign the
126 PCI INTA signal to a (preferably otherwise unused) system IRQ line.
127 Note: Kernel versions earlier than 1.3.73 do not support shared PCI
130 III. Driver operation
136 http://www.smsc.com/main/datasheets/83c171.pdf
137 http://www.smsc.com/main/datasheets/83c175.pdf
138 http://scyld.com/expert/NWay.html
139 http://www.national.com/pf/DP/DP83840A.html
146 enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 };
148 #define EPIC_TOTAL_SIZE 0x100
158 struct epic_chip_info {
160 int drv_flags; /* Driver use, intended as capability flags. */
164 /* indexed by chip_t */
165 static const struct epic_chip_info pci_id_tbl[] = {
166 { "SMSC EPIC/100 83c170", TYPE2_INTR | NO_MII | MII_PWRDWN },
167 { "SMSC EPIC/100 83c170", TYPE2_INTR },
168 { "SMSC EPIC/C 83c175", TYPE2_INTR | MII_PWRDWN },
172 static struct pci_device_id epic_pci_tbl[] = {
173 { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0 },
174 { 0x10B8, 0x0005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMSC_83C170 },
175 { 0x10B8, 0x0006, PCI_ANY_ID, PCI_ANY_ID,
176 PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, SMSC_83C175 },
179 MODULE_DEVICE_TABLE (pci, epic_pci_tbl);
197 /* Offsets to registers, using the (ugh) SMC names. */
198 enum epic_registers {
199 COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14,
201 TEST1=0x1C, CRCCNT=0x20, ALICNT=0x24, MPCNT=0x28, /* Rx error counters. */
202 MIICtrl=0x30, MIIData=0x34, MIICfg=0x38,
203 LAN0=64, /* MAC address. */
204 MC0=80, /* Multicast filter table. */
205 RxCtrl=96, TxCtrl=112, TxSTAT=0x74,
206 PRxCDAR=0x84, RxSTAT=0xA4, EarlyRx=0xB0, PTxCDAR=0xC4, TxThresh=0xDC,
209 /* Interrupt register bits, using my own meaningful names. */
211 TxIdle=0x40000, RxIdle=0x20000, IntrSummary=0x010000,
212 PCIBusErr170=0x7000, PCIBusErr175=0x1000, PhyEvent175=0x8000,
213 RxStarted=0x0800, RxEarlyWarn=0x0400, CntFull=0x0200, TxUnderrun=0x0100,
214 TxEmpty=0x0080, TxDone=0x0020, RxError=0x0010,
215 RxOverflow=0x0008, RxFull=0x0004, RxHeader=0x0002, RxDone=0x0001,
218 StopRx=1, StartRx=2, TxQueued=4, RxQueued=8,
219 StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80,
222 #define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
224 #define EpicNapiEvent (TxEmpty | TxDone | \
225 RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
226 #define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
228 static const u16 media2miictl[16] = {
229 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
230 0, 0, 0, 0, 0, 0, 0, 0 };
232 /* The EPIC100 Rx and Tx buffer descriptors. */
234 struct epic_tx_desc {
241 struct epic_rx_desc {
248 enum desc_status_bits {
252 #define PRIV_ALIGN 15 /* Required alignment mask */
253 struct epic_private {
254 struct epic_rx_desc *rx_ring;
255 struct epic_tx_desc *tx_ring;
256 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
257 struct sk_buff* tx_skbuff[TX_RING_SIZE];
258 /* The addresses of receive-in-place skbuffs. */
259 struct sk_buff* rx_skbuff[RX_RING_SIZE];
261 dma_addr_t tx_ring_dma;
262 dma_addr_t rx_ring_dma;
265 spinlock_t lock; /* Group with Tx control cache line. */
266 spinlock_t napi_lock;
267 unsigned int reschedule_in_poll;
268 unsigned int cur_tx, dirty_tx;
270 unsigned int cur_rx, dirty_rx;
272 unsigned int rx_buf_sz; /* Based on MTU+slack. */
274 struct pci_dev *pci_dev; /* PCI bus location. */
275 int chip_id, chip_flags;
277 struct net_device_stats stats;
278 struct timer_list timer; /* Media selection timer. */
280 unsigned char mc_filter[8];
281 signed char phys[4]; /* MII device addresses. */
282 u16 advertising; /* NWay media advertisement */
284 struct mii_if_info mii;
285 unsigned int tx_full:1; /* The Tx queue is full. */
286 unsigned int default_port:4; /* Last dev->if_port value. */
289 static int epic_open(struct net_device *dev);
290 static int read_eeprom(long ioaddr, int location);
291 static int mdio_read(struct net_device *dev, int phy_id, int location);
292 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val);
293 static void epic_restart(struct net_device *dev);
294 static void epic_timer(unsigned long data);
295 static void epic_tx_timeout(struct net_device *dev);
296 static void epic_init_ring(struct net_device *dev);
297 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
298 static int epic_rx(struct net_device *dev, int budget);
299 static int epic_poll(struct net_device *dev, int *budget);
300 static irqreturn_t epic_interrupt(int irq, void *dev_instance);
301 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
302 static const struct ethtool_ops netdev_ethtool_ops;
303 static int epic_close(struct net_device *dev);
304 static struct net_device_stats *epic_get_stats(struct net_device *dev);
305 static void set_rx_mode(struct net_device *dev);
309 static int __devinit epic_init_one (struct pci_dev *pdev,
310 const struct pci_device_id *ent)
312 static int card_idx = -1;
314 int chip_idx = (int) ent->driver_data;
316 struct net_device *dev;
317 struct epic_private *ep;
318 int i, ret, option = 0, duplex = 0;
322 /* when built into the kernel, we only print version if device is found */
324 static int printed_version;
325 if (!printed_version++)
326 printk (KERN_INFO "%s" KERN_INFO "%s" KERN_INFO "%s",
327 version, version2, version3);
332 ret = pci_enable_device(pdev);
337 if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) {
338 dev_err(&pdev->dev, "no PCI region space\n");
340 goto err_out_disable;
343 pci_set_master(pdev);
345 ret = pci_request_regions(pdev, DRV_NAME);
347 goto err_out_disable;
351 dev = alloc_etherdev(sizeof (*ep));
353 dev_err(&pdev->dev, "no memory for eth device\n");
354 goto err_out_free_res;
356 SET_MODULE_OWNER(dev);
357 SET_NETDEV_DEV(dev, &pdev->dev);
360 ioaddr = pci_resource_start (pdev, 0);
362 ioaddr = pci_resource_start (pdev, 1);
363 ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1));
365 dev_err(&pdev->dev, "ioremap failed\n");
366 goto err_out_free_netdev;
370 pci_set_drvdata(pdev, dev);
373 ep->mii.mdio_read = mdio_read;
374 ep->mii.mdio_write = mdio_write;
375 ep->mii.phy_id_mask = 0x1f;
376 ep->mii.reg_num_mask = 0x1f;
378 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
380 goto err_out_iounmap;
381 ep->tx_ring = (struct epic_tx_desc *)ring_space;
382 ep->tx_ring_dma = ring_dma;
384 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
386 goto err_out_unmap_tx;
387 ep->rx_ring = (struct epic_rx_desc *)ring_space;
388 ep->rx_ring_dma = ring_dma;
390 if (dev->mem_start) {
391 option = dev->mem_start;
392 duplex = (dev->mem_start & 16) ? 1 : 0;
393 } else if (card_idx >= 0 && card_idx < MAX_UNITS) {
394 if (options[card_idx] >= 0)
395 option = options[card_idx];
396 if (full_duplex[card_idx] >= 0)
397 duplex = full_duplex[card_idx];
400 dev->base_addr = ioaddr;
403 spin_lock_init(&ep->lock);
404 spin_lock_init(&ep->napi_lock);
405 ep->reschedule_in_poll = 0;
407 /* Bring the chip out of low-power mode. */
408 outl(0x4200, ioaddr + GENCTL);
409 /* Magic?! If we don't set this bit the MII interface won't work. */
410 /* This magic is documented in SMSC app note 7.15 */
411 for (i = 16; i > 0; i--)
412 outl(0x0008, ioaddr + TEST1);
414 /* Turn on the MII transceiver. */
415 outl(0x12, ioaddr + MIICfg);
417 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
418 outl(0x0200, ioaddr + GENCTL);
420 /* Note: the '175 does not have a serial EEPROM. */
421 for (i = 0; i < 3; i++)
422 ((u16 *)dev->dev_addr)[i] = le16_to_cpu(inw(ioaddr + LAN0 + i*4));
425 dev_printk(KERN_DEBUG, &pdev->dev, "EEPROM contents:\n");
426 for (i = 0; i < 64; i++)
427 printk(" %4.4x%s", read_eeprom(ioaddr, i),
428 i % 16 == 15 ? "\n" : "");
432 ep->chip_id = chip_idx;
433 ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
435 (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
436 | CntFull | TxUnderrun | EpicNapiEvent;
438 /* Find the connected MII xcvrs.
439 Doing this in open() would allow detecting external xcvrs later, but
440 takes much time and no cards have external MII. */
442 int phy, phy_idx = 0;
443 for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) {
444 int mii_status = mdio_read(dev, phy, MII_BMSR);
445 if (mii_status != 0xffff && mii_status != 0x0000) {
446 ep->phys[phy_idx++] = phy;
448 "MII transceiver #%d control "
449 "%4.4x status %4.4x.\n",
450 phy, mdio_read(dev, phy, 0), mii_status);
453 ep->mii_phy_cnt = phy_idx;
456 ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE);
458 "Autonegotiation advertising %4.4x link "
460 ep->mii.advertising, mdio_read(dev, phy, 5));
461 } else if ( ! (ep->chip_flags & NO_MII)) {
463 "***WARNING***: No MII transceiver found!\n");
464 /* Use the known PHY address of the EPII. */
467 ep->mii.phy_id = ep->phys[0];
470 /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */
471 if (ep->chip_flags & MII_PWRDWN)
472 outl(inl(ioaddr + NVCTL) & ~0x483C, ioaddr + NVCTL);
473 outl(0x0008, ioaddr + GENCTL);
475 /* The lower four bits are the media type. */
477 ep->mii.force_media = ep->mii.full_duplex = 1;
478 dev_info(&pdev->dev, "Forced full duplex requested.\n");
480 dev->if_port = ep->default_port = option;
482 /* The Epic-specific entries in the device structure. */
483 dev->open = &epic_open;
484 dev->hard_start_xmit = &epic_start_xmit;
485 dev->stop = &epic_close;
486 dev->get_stats = &epic_get_stats;
487 dev->set_multicast_list = &set_rx_mode;
488 dev->do_ioctl = &netdev_ioctl;
489 dev->ethtool_ops = &netdev_ethtool_ops;
490 dev->watchdog_timeo = TX_TIMEOUT;
491 dev->tx_timeout = &epic_tx_timeout;
492 dev->poll = epic_poll;
495 ret = register_netdev(dev);
497 goto err_out_unmap_rx;
499 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ",
500 dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq);
501 for (i = 0; i < 5; i++)
502 printk("%2.2x:", dev->dev_addr[i]);
503 printk("%2.2x.\n", dev->dev_addr[i]);
509 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
511 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
519 pci_release_regions(pdev);
521 pci_disable_device(pdev);
525 /* Serial EEPROM section. */
527 /* EEPROM_Ctrl bits. */
528 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
529 #define EE_CS 0x02 /* EEPROM chip select. */
530 #define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */
531 #define EE_WRITE_0 0x01
532 #define EE_WRITE_1 0x09
533 #define EE_DATA_READ 0x10 /* EEPROM chip data out. */
534 #define EE_ENB (0x0001 | EE_CS)
536 /* Delay between EEPROM clock transitions.
537 This serves to flush the operation to the PCI bus.
540 #define eeprom_delay() inl(ee_addr)
542 /* The EEPROM commands include the alway-set leading bit. */
543 #define EE_WRITE_CMD (5 << 6)
544 #define EE_READ64_CMD (6 << 6)
545 #define EE_READ256_CMD (6 << 8)
546 #define EE_ERASE_CMD (7 << 6)
548 static void epic_disable_int(struct net_device *dev, struct epic_private *ep)
550 long ioaddr = dev->base_addr;
552 outl(0x00000000, ioaddr + INTMASK);
555 static inline void __epic_pci_commit(long ioaddr)
558 inl(ioaddr + INTMASK);
562 static inline void epic_napi_irq_off(struct net_device *dev,
563 struct epic_private *ep)
565 long ioaddr = dev->base_addr;
567 outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK);
568 __epic_pci_commit(ioaddr);
571 static inline void epic_napi_irq_on(struct net_device *dev,
572 struct epic_private *ep)
574 long ioaddr = dev->base_addr;
576 /* No need to commit possible posted write */
577 outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK);
580 static int __devinit read_eeprom(long ioaddr, int location)
584 long ee_addr = ioaddr + EECTL;
585 int read_cmd = location |
586 (inl(ee_addr) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD);
588 outl(EE_ENB & ~EE_CS, ee_addr);
589 outl(EE_ENB, ee_addr);
591 /* Shift the read command bits out. */
592 for (i = 12; i >= 0; i--) {
593 short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0;
594 outl(EE_ENB | dataval, ee_addr);
596 outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
599 outl(EE_ENB, ee_addr);
601 for (i = 16; i > 0; i--) {
602 outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
604 retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
605 outl(EE_ENB, ee_addr);
609 /* Terminate the EEPROM access. */
610 outl(EE_ENB & ~EE_CS, ee_addr);
615 #define MII_WRITEOP 2
616 static int mdio_read(struct net_device *dev, int phy_id, int location)
618 long ioaddr = dev->base_addr;
619 int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP;
622 outl(read_cmd, ioaddr + MIICtrl);
623 /* Typical operation takes 25 loops. */
624 for (i = 400; i > 0; i--) {
626 if ((inl(ioaddr + MIICtrl) & MII_READOP) == 0) {
627 /* Work around read failure bug. */
628 if (phy_id == 1 && location < 6
629 && inw(ioaddr + MIIData) == 0xffff) {
630 outl(read_cmd, ioaddr + MIICtrl);
633 return inw(ioaddr + MIIData);
639 static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
641 long ioaddr = dev->base_addr;
644 outw(value, ioaddr + MIIData);
645 outl((phy_id << 9) | (loc << 4) | MII_WRITEOP, ioaddr + MIICtrl);
646 for (i = 10000; i > 0; i--) {
648 if ((inl(ioaddr + MIICtrl) & MII_WRITEOP) == 0)
655 static int epic_open(struct net_device *dev)
657 struct epic_private *ep = dev->priv;
658 long ioaddr = dev->base_addr;
662 /* Soft reset the chip. */
663 outl(0x4001, ioaddr + GENCTL);
665 if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev)))
670 outl(0x4000, ioaddr + GENCTL);
671 /* This magic is documented in SMSC app note 7.15 */
672 for (i = 16; i > 0; i--)
673 outl(0x0008, ioaddr + TEST1);
675 /* Pull the chip out of low-power mode, enable interrupts, and set for
676 PCI read multiple. The MIIcfg setting and strange write order are
677 required by the details of which bits are reset and the transceiver
678 wiring on the Ositech CardBus card.
681 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
683 if (ep->chip_flags & MII_PWRDWN)
684 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
686 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
687 outl(0x4432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
688 inl(ioaddr + GENCTL);
689 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
691 outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
692 inl(ioaddr + GENCTL);
693 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
696 udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
698 for (i = 0; i < 3; i++)
699 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
701 ep->tx_threshold = TX_FIFO_THRESH;
702 outl(ep->tx_threshold, ioaddr + TxThresh);
704 if (media2miictl[dev->if_port & 15]) {
706 mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]);
707 if (dev->if_port == 1) {
709 printk(KERN_INFO "%s: Using the 10base2 transceiver, MII "
711 dev->name, mdio_read(dev, ep->phys[0], MII_BMSR));
714 int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA);
715 if (mii_lpa != 0xffff) {
716 if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL)
717 ep->mii.full_duplex = 1;
718 else if (! (mii_lpa & LPA_LPACK))
719 mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART);
721 printk(KERN_INFO "%s: Setting %s-duplex based on MII xcvr %d"
722 " register read of %4.4x.\n", dev->name,
723 ep->mii.full_duplex ? "full" : "half",
724 ep->phys[0], mii_lpa);
728 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
729 outl(ep->rx_ring_dma, ioaddr + PRxCDAR);
730 outl(ep->tx_ring_dma, ioaddr + PTxCDAR);
732 /* Start the chip's Rx process. */
734 outl(StartRx | RxQueued, ioaddr + COMMAND);
736 netif_start_queue(dev);
738 /* Enable interrupts by setting the interrupt mask. */
739 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
740 | CntFull | TxUnderrun
741 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
744 printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
746 dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL),
747 ep->mii.full_duplex ? "full" : "half");
749 /* Set the timer to switch to check for link beat and perhaps switch
750 to an alternate media type. */
751 init_timer(&ep->timer);
752 ep->timer.expires = jiffies + 3*HZ;
753 ep->timer.data = (unsigned long)dev;
754 ep->timer.function = &epic_timer; /* timer handler */
755 add_timer(&ep->timer);
760 /* Reset the chip to recover from a PCI transaction error.
761 This may occur at interrupt time. */
762 static void epic_pause(struct net_device *dev)
764 long ioaddr = dev->base_addr;
765 struct epic_private *ep = dev->priv;
767 netif_stop_queue (dev);
769 /* Disable interrupts by clearing the interrupt mask. */
770 outl(0x00000000, ioaddr + INTMASK);
771 /* Stop the chip's Tx and Rx DMA processes. */
772 outw(StopRx | StopTxDMA | StopRxDMA, ioaddr + COMMAND);
774 /* Update the error counts. */
775 if (inw(ioaddr + COMMAND) != 0xffff) {
776 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
777 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
778 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
781 /* Remove the packets on the Rx queue. */
782 epic_rx(dev, RX_RING_SIZE);
785 static void epic_restart(struct net_device *dev)
787 long ioaddr = dev->base_addr;
788 struct epic_private *ep = dev->priv;
791 /* Soft reset the chip. */
792 outl(0x4001, ioaddr + GENCTL);
794 printk(KERN_DEBUG "%s: Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n",
795 dev->name, ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx);
798 /* This magic is documented in SMSC app note 7.15 */
799 for (i = 16; i > 0; i--)
800 outl(0x0008, ioaddr + TEST1);
802 #if defined(__powerpc__) || defined(__sparc__) /* Big endian */
803 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
805 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
807 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
808 if (ep->chip_flags & MII_PWRDWN)
809 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
811 for (i = 0; i < 3; i++)
812 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
814 ep->tx_threshold = TX_FIFO_THRESH;
815 outl(ep->tx_threshold, ioaddr + TxThresh);
816 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
817 outl(ep->rx_ring_dma + (ep->cur_rx%RX_RING_SIZE)*
818 sizeof(struct epic_rx_desc), ioaddr + PRxCDAR);
819 outl(ep->tx_ring_dma + (ep->dirty_tx%TX_RING_SIZE)*
820 sizeof(struct epic_tx_desc), ioaddr + PTxCDAR);
822 /* Start the chip's Rx process. */
824 outl(StartRx | RxQueued, ioaddr + COMMAND);
826 /* Enable interrupts by setting the interrupt mask. */
827 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
828 | CntFull | TxUnderrun
829 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
831 printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x"
832 " interrupt %4.4x.\n",
833 dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL),
834 (int)inl(ioaddr + INTSTAT));
838 static void check_media(struct net_device *dev)
840 struct epic_private *ep = dev->priv;
841 long ioaddr = dev->base_addr;
842 int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0;
843 int negotiated = mii_lpa & ep->mii.advertising;
844 int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
846 if (ep->mii.force_media)
848 if (mii_lpa == 0xffff) /* Bogus read */
850 if (ep->mii.full_duplex != duplex) {
851 ep->mii.full_duplex = duplex;
852 printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link"
853 " partner capability of %4.4x.\n", dev->name,
854 ep->mii.full_duplex ? "full" : "half", ep->phys[0], mii_lpa);
855 outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl);
859 static void epic_timer(unsigned long data)
861 struct net_device *dev = (struct net_device *)data;
862 struct epic_private *ep = dev->priv;
863 long ioaddr = dev->base_addr;
864 int next_tick = 5*HZ;
867 printk(KERN_DEBUG "%s: Media monitor tick, Tx status %8.8x.\n",
868 dev->name, (int)inl(ioaddr + TxSTAT));
869 printk(KERN_DEBUG "%s: Other registers are IntMask %4.4x "
870 "IntStatus %4.4x RxStatus %4.4x.\n",
871 dev->name, (int)inl(ioaddr + INTMASK),
872 (int)inl(ioaddr + INTSTAT), (int)inl(ioaddr + RxSTAT));
877 ep->timer.expires = jiffies + next_tick;
878 add_timer(&ep->timer);
881 static void epic_tx_timeout(struct net_device *dev)
883 struct epic_private *ep = dev->priv;
884 long ioaddr = dev->base_addr;
887 printk(KERN_WARNING "%s: Transmit timeout using MII device, "
888 "Tx status %4.4x.\n",
889 dev->name, (int)inw(ioaddr + TxSTAT));
891 printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n",
892 dev->name, ep->dirty_tx, ep->cur_tx);
895 if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */
896 ep->stats.tx_fifo_errors++;
897 outl(RestartTx, ioaddr + COMMAND);
900 outl(TxQueued, dev->base_addr + COMMAND);
903 dev->trans_start = jiffies;
904 ep->stats.tx_errors++;
906 netif_wake_queue(dev);
909 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
910 static void epic_init_ring(struct net_device *dev)
912 struct epic_private *ep = dev->priv;
916 ep->dirty_tx = ep->cur_tx = 0;
917 ep->cur_rx = ep->dirty_rx = 0;
918 ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
920 /* Initialize all Rx descriptors. */
921 for (i = 0; i < RX_RING_SIZE; i++) {
922 ep->rx_ring[i].rxstatus = 0;
923 ep->rx_ring[i].buflength = cpu_to_le32(ep->rx_buf_sz);
924 ep->rx_ring[i].next = ep->rx_ring_dma +
925 (i+1)*sizeof(struct epic_rx_desc);
926 ep->rx_skbuff[i] = NULL;
928 /* Mark the last entry as wrapping the ring. */
929 ep->rx_ring[i-1].next = ep->rx_ring_dma;
931 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
932 for (i = 0; i < RX_RING_SIZE; i++) {
933 struct sk_buff *skb = dev_alloc_skb(ep->rx_buf_sz);
934 ep->rx_skbuff[i] = skb;
937 skb_reserve(skb, 2); /* 16 byte align the IP header. */
938 ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev,
939 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
940 ep->rx_ring[i].rxstatus = cpu_to_le32(DescOwn);
942 ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
944 /* The Tx buffer descriptor is filled in as needed, but we
945 do need to clear the ownership bit. */
946 for (i = 0; i < TX_RING_SIZE; i++) {
947 ep->tx_skbuff[i] = NULL;
948 ep->tx_ring[i].txstatus = 0x0000;
949 ep->tx_ring[i].next = ep->tx_ring_dma +
950 (i+1)*sizeof(struct epic_tx_desc);
952 ep->tx_ring[i-1].next = ep->tx_ring_dma;
956 static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
958 struct epic_private *ep = dev->priv;
959 int entry, free_count;
963 if (skb_padto(skb, ETH_ZLEN))
966 /* Caution: the write order is important here, set the field with the
967 "ownership" bit last. */
969 /* Calculate the next Tx descriptor entry. */
970 spin_lock_irqsave(&ep->lock, flags);
971 free_count = ep->cur_tx - ep->dirty_tx;
972 entry = ep->cur_tx % TX_RING_SIZE;
974 ep->tx_skbuff[entry] = skb;
975 ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data,
976 skb->len, PCI_DMA_TODEVICE);
977 if (free_count < TX_QUEUE_LEN/2) {/* Typical path */
978 ctrl_word = cpu_to_le32(0x100000); /* No interrupt */
979 } else if (free_count == TX_QUEUE_LEN/2) {
980 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
981 } else if (free_count < TX_QUEUE_LEN - 1) {
982 ctrl_word = cpu_to_le32(0x100000); /* No Tx-done intr. */
984 /* Leave room for an additional entry. */
985 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
988 ep->tx_ring[entry].buflength = ctrl_word | cpu_to_le32(skb->len);
989 ep->tx_ring[entry].txstatus =
990 ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16)
991 | cpu_to_le32(DescOwn);
995 netif_stop_queue(dev);
997 spin_unlock_irqrestore(&ep->lock, flags);
998 /* Trigger an immediate transmit demand. */
999 outl(TxQueued, dev->base_addr + COMMAND);
1001 dev->trans_start = jiffies;
1003 printk(KERN_DEBUG "%s: Queued Tx packet size %d to slot %d, "
1004 "flag %2.2x Tx status %8.8x.\n",
1005 dev->name, (int)skb->len, entry, ctrl_word,
1006 (int)inl(dev->base_addr + TxSTAT));
1011 static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
1014 struct net_device_stats *stats = &ep->stats;
1016 #ifndef final_version
1017 /* There was an major error, log it. */
1019 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1023 if (status & 0x1050)
1024 stats->tx_aborted_errors++;
1025 if (status & 0x0008)
1026 stats->tx_carrier_errors++;
1027 if (status & 0x0040)
1028 stats->tx_window_errors++;
1029 if (status & 0x0010)
1030 stats->tx_fifo_errors++;
1033 static void epic_tx(struct net_device *dev, struct epic_private *ep)
1035 unsigned int dirty_tx, cur_tx;
1038 * Note: if this lock becomes a problem we can narrow the locked
1039 * region at the cost of occasionally grabbing the lock more times.
1041 cur_tx = ep->cur_tx;
1042 for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) {
1043 struct sk_buff *skb;
1044 int entry = dirty_tx % TX_RING_SIZE;
1045 int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus);
1047 if (txstatus & DescOwn)
1048 break; /* It still hasn't been Txed */
1050 if (likely(txstatus & 0x0001)) {
1051 ep->stats.collisions += (txstatus >> 8) & 15;
1052 ep->stats.tx_packets++;
1053 ep->stats.tx_bytes += ep->tx_skbuff[entry]->len;
1055 epic_tx_error(dev, ep, txstatus);
1057 /* Free the original skb. */
1058 skb = ep->tx_skbuff[entry];
1059 pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
1060 skb->len, PCI_DMA_TODEVICE);
1061 dev_kfree_skb_irq(skb);
1062 ep->tx_skbuff[entry] = NULL;
1065 #ifndef final_version
1066 if (cur_tx - dirty_tx > TX_RING_SIZE) {
1068 "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1069 dev->name, dirty_tx, cur_tx, ep->tx_full);
1070 dirty_tx += TX_RING_SIZE;
1073 ep->dirty_tx = dirty_tx;
1074 if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) {
1075 /* The ring is no longer full, allow new TX entries. */
1077 netif_wake_queue(dev);
1081 /* The interrupt handler does all of the Rx thread work and cleans up
1082 after the Tx thread. */
1083 static irqreturn_t epic_interrupt(int irq, void *dev_instance)
1085 struct net_device *dev = dev_instance;
1086 struct epic_private *ep = dev->priv;
1087 long ioaddr = dev->base_addr;
1088 unsigned int handled = 0;
1091 status = inl(ioaddr + INTSTAT);
1092 /* Acknowledge all of the current interrupt sources ASAP. */
1093 outl(status & EpicNormalEvent, ioaddr + INTSTAT);
1096 printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
1097 "intstat=%#8.8x.\n", dev->name, status,
1098 (int)inl(ioaddr + INTSTAT));
1101 if ((status & IntrSummary) == 0)
1106 if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
1107 spin_lock(&ep->napi_lock);
1108 if (netif_rx_schedule_prep(dev)) {
1109 epic_napi_irq_off(dev, ep);
1110 __netif_rx_schedule(dev);
1112 ep->reschedule_in_poll++;
1113 spin_unlock(&ep->napi_lock);
1115 status &= ~EpicNapiEvent;
1117 /* Check uncommon events all at once. */
1118 if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
1119 if (status == EpicRemoved)
1122 /* Always update the error counts to avoid overhead later. */
1123 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1124 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1125 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1127 if (status & TxUnderrun) { /* Tx FIFO underflow. */
1128 ep->stats.tx_fifo_errors++;
1129 outl(ep->tx_threshold += 128, ioaddr + TxThresh);
1130 /* Restart the transmit process. */
1131 outl(RestartTx, ioaddr + COMMAND);
1133 if (status & PCIBusErr170) {
1134 printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n",
1139 /* Clear all error sources. */
1140 outl(status & 0x7f18, ioaddr + INTSTAT);
1145 printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n",
1149 return IRQ_RETVAL(handled);
1152 static int epic_rx(struct net_device *dev, int budget)
1154 struct epic_private *ep = dev->priv;
1155 int entry = ep->cur_rx % RX_RING_SIZE;
1156 int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx;
1160 printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
1161 ep->rx_ring[entry].rxstatus);
1163 if (rx_work_limit > budget)
1164 rx_work_limit = budget;
1166 /* If we own the next entry, it's a new packet. Send it up. */
1167 while ((ep->rx_ring[entry].rxstatus & cpu_to_le32(DescOwn)) == 0) {
1168 int status = le32_to_cpu(ep->rx_ring[entry].rxstatus);
1171 printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status);
1172 if (--rx_work_limit < 0)
1174 if (status & 0x2006) {
1176 printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n",
1178 if (status & 0x2000) {
1179 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1180 "multiple buffers, status %4.4x!\n", dev->name, status);
1181 ep->stats.rx_length_errors++;
1182 } else if (status & 0x0006)
1183 /* Rx Frame errors are counted in hardware. */
1184 ep->stats.rx_errors++;
1186 /* Malloc up new buffer, compatible with net-2e. */
1187 /* Omit the four octet CRC from the length. */
1188 short pkt_len = (status >> 16) - 4;
1189 struct sk_buff *skb;
1191 if (pkt_len > PKT_BUF_SZ - 4) {
1192 printk(KERN_ERR "%s: Oversized Ethernet frame, status %x "
1194 dev->name, status, pkt_len);
1197 /* Check if the packet is long enough to accept without copying
1198 to a minimally-sized skbuff. */
1199 if (pkt_len < rx_copybreak
1200 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1201 skb_reserve(skb, 2); /* 16 byte align the IP header */
1202 pci_dma_sync_single_for_cpu(ep->pci_dev,
1203 ep->rx_ring[entry].bufaddr,
1205 PCI_DMA_FROMDEVICE);
1206 eth_copy_and_sum(skb, ep->rx_skbuff[entry]->data, pkt_len, 0);
1207 skb_put(skb, pkt_len);
1208 pci_dma_sync_single_for_device(ep->pci_dev,
1209 ep->rx_ring[entry].bufaddr,
1211 PCI_DMA_FROMDEVICE);
1213 pci_unmap_single(ep->pci_dev,
1214 ep->rx_ring[entry].bufaddr,
1215 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1216 skb_put(skb = ep->rx_skbuff[entry], pkt_len);
1217 ep->rx_skbuff[entry] = NULL;
1219 skb->protocol = eth_type_trans(skb, dev);
1220 netif_receive_skb(skb);
1221 dev->last_rx = jiffies;
1222 ep->stats.rx_packets++;
1223 ep->stats.rx_bytes += pkt_len;
1226 entry = (++ep->cur_rx) % RX_RING_SIZE;
1229 /* Refill the Rx ring buffers. */
1230 for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) {
1231 entry = ep->dirty_rx % RX_RING_SIZE;
1232 if (ep->rx_skbuff[entry] == NULL) {
1233 struct sk_buff *skb;
1234 skb = ep->rx_skbuff[entry] = dev_alloc_skb(ep->rx_buf_sz);
1237 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
1238 ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev,
1239 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1242 ep->rx_ring[entry].rxstatus = cpu_to_le32(DescOwn);
1247 static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
1249 long ioaddr = dev->base_addr;
1252 status = inl(ioaddr + INTSTAT);
1254 if (status == EpicRemoved)
1256 if (status & RxOverflow) /* Missed a Rx frame. */
1257 ep->stats.rx_errors++;
1258 if (status & (RxOverflow | RxFull))
1259 outw(RxQueued, ioaddr + COMMAND);
1262 static int epic_poll(struct net_device *dev, int *budget)
1264 struct epic_private *ep = dev->priv;
1265 int work_done = 0, orig_budget;
1266 long ioaddr = dev->base_addr;
1268 orig_budget = (*budget > dev->quota) ? dev->quota : *budget;
1274 work_done += epic_rx(dev, *budget);
1276 epic_rx_err(dev, ep);
1278 *budget -= work_done;
1279 dev->quota -= work_done;
1281 if (netif_running(dev) && (work_done < orig_budget)) {
1282 unsigned long flags;
1285 /* A bit baroque but it avoids a (space hungry) spin_unlock */
1287 spin_lock_irqsave(&ep->napi_lock, flags);
1289 more = ep->reschedule_in_poll;
1291 __netif_rx_complete(dev);
1292 outl(EpicNapiEvent, ioaddr + INTSTAT);
1293 epic_napi_irq_on(dev, ep);
1295 ep->reschedule_in_poll--;
1297 spin_unlock_irqrestore(&ep->napi_lock, flags);
1303 return (work_done >= orig_budget);
1306 static int epic_close(struct net_device *dev)
1308 long ioaddr = dev->base_addr;
1309 struct epic_private *ep = dev->priv;
1310 struct sk_buff *skb;
1313 netif_stop_queue(dev);
1316 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
1317 dev->name, (int)inl(ioaddr + INTSTAT));
1319 del_timer_sync(&ep->timer);
1321 epic_disable_int(dev, ep);
1323 free_irq(dev->irq, dev);
1327 /* Free all the skbuffs in the Rx queue. */
1328 for (i = 0; i < RX_RING_SIZE; i++) {
1329 skb = ep->rx_skbuff[i];
1330 ep->rx_skbuff[i] = NULL;
1331 ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */
1332 ep->rx_ring[i].buflength = 0;
1334 pci_unmap_single(ep->pci_dev, ep->rx_ring[i].bufaddr,
1335 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1338 ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */
1340 for (i = 0; i < TX_RING_SIZE; i++) {
1341 skb = ep->tx_skbuff[i];
1342 ep->tx_skbuff[i] = NULL;
1345 pci_unmap_single(ep->pci_dev, ep->tx_ring[i].bufaddr,
1346 skb->len, PCI_DMA_TODEVICE);
1350 /* Green! Leave the chip in low-power mode. */
1351 outl(0x0008, ioaddr + GENCTL);
1356 static struct net_device_stats *epic_get_stats(struct net_device *dev)
1358 struct epic_private *ep = dev->priv;
1359 long ioaddr = dev->base_addr;
1361 if (netif_running(dev)) {
1362 /* Update the error counts. */
1363 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1364 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1365 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1371 /* Set or clear the multicast filter for this adaptor.
1372 Note that we only use exclusion around actually queueing the
1373 new frame, not around filling ep->setup_frame. This is non-deterministic
1374 when re-entered but still correct. */
1376 static void set_rx_mode(struct net_device *dev)
1378 long ioaddr = dev->base_addr;
1379 struct epic_private *ep = dev->priv;
1380 unsigned char mc_filter[8]; /* Multicast hash filter */
1383 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1384 outl(0x002C, ioaddr + RxCtrl);
1385 /* Unconditionally log net taps. */
1386 memset(mc_filter, 0xff, sizeof(mc_filter));
1387 } else if ((dev->mc_count > 0) || (dev->flags & IFF_ALLMULTI)) {
1388 /* There is apparently a chip bug, so the multicast filter
1389 is never enabled. */
1390 /* Too many to filter perfectly -- accept all multicasts. */
1391 memset(mc_filter, 0xff, sizeof(mc_filter));
1392 outl(0x000C, ioaddr + RxCtrl);
1393 } else if (dev->mc_count == 0) {
1394 outl(0x0004, ioaddr + RxCtrl);
1396 } else { /* Never executed, for now. */
1397 struct dev_mc_list *mclist;
1399 memset(mc_filter, 0, sizeof(mc_filter));
1400 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1401 i++, mclist = mclist->next) {
1402 unsigned int bit_nr =
1403 ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f;
1404 mc_filter[bit_nr >> 3] |= (1 << bit_nr);
1407 /* ToDo: perhaps we need to stop the Tx and Rx process here? */
1408 if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) {
1409 for (i = 0; i < 4; i++)
1410 outw(((u16 *)mc_filter)[i], ioaddr + MC0 + i*4);
1411 memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter));
1416 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1418 struct epic_private *np = dev->priv;
1420 strcpy (info->driver, DRV_NAME);
1421 strcpy (info->version, DRV_VERSION);
1422 strcpy (info->bus_info, pci_name(np->pci_dev));
1425 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1427 struct epic_private *np = dev->priv;
1430 spin_lock_irq(&np->lock);
1431 rc = mii_ethtool_gset(&np->mii, cmd);
1432 spin_unlock_irq(&np->lock);
1437 static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1439 struct epic_private *np = dev->priv;
1442 spin_lock_irq(&np->lock);
1443 rc = mii_ethtool_sset(&np->mii, cmd);
1444 spin_unlock_irq(&np->lock);
1449 static int netdev_nway_reset(struct net_device *dev)
1451 struct epic_private *np = dev->priv;
1452 return mii_nway_restart(&np->mii);
1455 static u32 netdev_get_link(struct net_device *dev)
1457 struct epic_private *np = dev->priv;
1458 return mii_link_ok(&np->mii);
1461 static u32 netdev_get_msglevel(struct net_device *dev)
1466 static void netdev_set_msglevel(struct net_device *dev, u32 value)
1471 static int ethtool_begin(struct net_device *dev)
1473 unsigned long ioaddr = dev->base_addr;
1474 /* power-up, if interface is down */
1475 if (! netif_running(dev)) {
1476 outl(0x0200, ioaddr + GENCTL);
1477 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1482 static void ethtool_complete(struct net_device *dev)
1484 unsigned long ioaddr = dev->base_addr;
1485 /* power-down, if interface is down */
1486 if (! netif_running(dev)) {
1487 outl(0x0008, ioaddr + GENCTL);
1488 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1492 static const struct ethtool_ops netdev_ethtool_ops = {
1493 .get_drvinfo = netdev_get_drvinfo,
1494 .get_settings = netdev_get_settings,
1495 .set_settings = netdev_set_settings,
1496 .nway_reset = netdev_nway_reset,
1497 .get_link = netdev_get_link,
1498 .get_msglevel = netdev_get_msglevel,
1499 .set_msglevel = netdev_set_msglevel,
1500 .get_sg = ethtool_op_get_sg,
1501 .get_tx_csum = ethtool_op_get_tx_csum,
1502 .begin = ethtool_begin,
1503 .complete = ethtool_complete
1506 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1508 struct epic_private *np = dev->priv;
1509 long ioaddr = dev->base_addr;
1510 struct mii_ioctl_data *data = if_mii(rq);
1513 /* power-up, if interface is down */
1514 if (! netif_running(dev)) {
1515 outl(0x0200, ioaddr + GENCTL);
1516 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1519 /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */
1520 spin_lock_irq(&np->lock);
1521 rc = generic_mii_ioctl(&np->mii, data, cmd, NULL);
1522 spin_unlock_irq(&np->lock);
1524 /* power-down, if interface is down */
1525 if (! netif_running(dev)) {
1526 outl(0x0008, ioaddr + GENCTL);
1527 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1533 static void __devexit epic_remove_one (struct pci_dev *pdev)
1535 struct net_device *dev = pci_get_drvdata(pdev);
1536 struct epic_private *ep = dev->priv;
1538 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
1539 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
1540 unregister_netdev(dev);
1542 iounmap((void*) dev->base_addr);
1544 pci_release_regions(pdev);
1546 pci_disable_device(pdev);
1547 pci_set_drvdata(pdev, NULL);
1548 /* pci_power_off(pdev, -1); */
1554 static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
1556 struct net_device *dev = pci_get_drvdata(pdev);
1557 long ioaddr = dev->base_addr;
1559 if (!netif_running(dev))
1562 /* Put the chip into low-power mode. */
1563 outl(0x0008, ioaddr + GENCTL);
1564 /* pci_power_off(pdev, -1); */
1569 static int epic_resume (struct pci_dev *pdev)
1571 struct net_device *dev = pci_get_drvdata(pdev);
1573 if (!netif_running(dev))
1576 /* pci_power_on(pdev); */
1580 #endif /* CONFIG_PM */
1583 static struct pci_driver epic_driver = {
1585 .id_table = epic_pci_tbl,
1586 .probe = epic_init_one,
1587 .remove = __devexit_p(epic_remove_one),
1589 .suspend = epic_suspend,
1590 .resume = epic_resume,
1591 #endif /* CONFIG_PM */
1595 static int __init epic_init (void)
1597 /* when a module, this is printed whether or not devices are found in probe */
1599 printk (KERN_INFO "%s" KERN_INFO "%s" KERN_INFO "%s",
1600 version, version2, version3);
1603 return pci_register_driver(&epic_driver);
1607 static void __exit epic_cleanup (void)
1609 pci_unregister_driver (&epic_driver);
1613 module_init(epic_init);
1614 module_exit(epic_cleanup);