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[RT2x00]: add driver for Ralink wireless hardware
[deliverable/linux.git] / drivers / net / epic100.c
CommitLineData
1da177e4
LT		 1/* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */
2/*
3 Written/copyright 1997-2001 by Donald Becker.
4
5 This software may be used and distributed according to the terms of
6 the GNU General Public License (GPL), incorporated herein by reference.
7 Drivers based on or derived from this code fall under the GPL and must
8 retain the authorship, copyright and license notice. This file is not
9 a complete program and may only be used when the entire operating
10 system is licensed under the GPL.
11
12 This driver is for the SMC83c170/175 "EPIC" series, as used on the
13 SMC EtherPower II 9432 PCI adapter, and several CardBus cards.
14
15 The author may be reached as becker@scyld.com, or C/O
16 Scyld Computing Corporation
17 410 Severn Ave., Suite 210
18 Annapolis MD 21403
19
20 Information and updates available at
21 http://www.scyld.com/network/epic100.html
36e1e847 22 [this link no longer provides anything useful -jgarzik]
1da177e4
LT		 23
24 ---------------------------------------------------------------------
f3b197ac 25
1da177e4
LT		 26*/
27
28#define DRV_NAME "epic100"
d5b20697
AG		 29#define DRV_VERSION "2.1"
30#define DRV_RELDATE "Sept 11, 2006"
1da177e4
LT		 31
32/* The user-configurable values.
33 These may be modified when a driver module is loaded.*/
34
35static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
36
37/* Used to pass the full-duplex flag, etc. */
38#define MAX_UNITS 8 /* More are supported, limit only on options */
39static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
40static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
41
42/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
43 Setting to > 1518 effectively disables this feature. */
44static int rx_copybreak;
45
46/* Operational parameters that are set at compile time. */
47
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)
58
59/* Operational parameters that usually are not changed. */
60/* Time in jiffies before concluding the transmitter is hung. */
61#define TX_TIMEOUT (2*HZ)
62
63#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
64
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 */
69
1da177e4
LT		 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>
89#include <asm/io.h>
90#include <asm/uaccess.h>
91
92/* These identify the driver base version and may not be removed. */
93static char version[] __devinitdata =
94DRV_NAME ".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>\n";
95static char version2[] __devinitdata =
1da177e4
LT		 96" (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n";
97
98MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
99MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver");
100MODULE_LICENSE("GPL");
101
102module_param(debug, int, 0);
103module_param(rx_copybreak, int, 0);
104module_param_array(options, int, NULL, 0);
105module_param_array(full_duplex, int, NULL, 0);
106MODULE_PARM_DESC(debug, "EPIC/100 debug level (0-5)");
107MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex");
108MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames");
109MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)");
110
111/*
112 Theory of Operation
113
114I. Board Compatibility
115
116This device driver is designed for the SMC "EPIC/100", the SMC
117single-chip Ethernet controllers for PCI. This chip is used on
118the SMC EtherPower II boards.
119
120II. Board-specific settings
121
122PCI bus devices are configured by the system at boot time, so no jumpers
123need to be set on the board. The system BIOS will assign the
124PCI INTA signal to a (preferably otherwise unused) system IRQ line.
125Note: Kernel versions earlier than 1.3.73 do not support shared PCI
126interrupt lines.
127
128III. Driver operation
129
130IIIa. Ring buffers
131
132IVb. References
133
134http://www.smsc.com/main/datasheets/83c171.pdf
135http://www.smsc.com/main/datasheets/83c175.pdf
136http://scyld.com/expert/NWay.html
137http://www.national.com/pf/DP/DP83840A.html
138
139IVc. Errata
140
141*/
142
143
1da177e4
LT		 144enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 };
145
146#define EPIC_TOTAL_SIZE 0x100
147#define USE_IO_OPS 1
1da177e4
LT		 148
149typedef enum {
150 SMSC_83C170_0,
151 SMSC_83C170,
152 SMSC_83C175,
153} chip_t;
154
155
156struct epic_chip_info {
157 const char *name;
1da177e4
LT		 158 int drv_flags; /* Driver use, intended as capability flags. */
159};
160
161
162/* indexed by chip_t */
f71e1309 163static const struct epic_chip_info pci_id_tbl[] = {
36e1e847
JG		 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 },
1da177e4
LT		 167};
168
169
170static 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 },
175 { 0,}
176};
177MODULE_DEVICE_TABLE (pci, epic_pci_tbl);
178
f3b197ac 179
1da177e4
LT		 180#ifndef USE_IO_OPS
181#undef inb
182#undef inw
183#undef inl
184#undef outb
185#undef outw
186#undef outl
187#define inb readb
188#define inw readw
189#define inl readl
190#define outb writeb
191#define outw writew
192#define outl writel
193#endif
194
195/* Offsets to registers, using the (ugh) SMC names. */
196enum epic_registers {
197 COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14,
198 PCIBurstCnt=0x18,
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,
205};
206
207/* Interrupt register bits, using my own meaningful names. */
208enum IntrStatus {
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,
214};
215enum CommandBits {
216 StopRx=1, StartRx=2, TxQueued=4, RxQueued=8,
217 StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80,
218};
219
220#define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
221
222#define EpicNapiEvent (TxEmpty | TxDone | \
223 RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
224#define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
225
f71e1309 226static const u16 media2miictl[16] = {
1da177e4
LT		 227 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
228 0, 0, 0, 0, 0, 0, 0, 0 };
229
230/* The EPIC100 Rx and Tx buffer descriptors. */
231
232struct epic_tx_desc {
233 u32 txstatus;
234 u32 bufaddr;
235 u32 buflength;
236 u32 next;
237};
238
239struct epic_rx_desc {
240 u32 rxstatus;
241 u32 bufaddr;
242 u32 buflength;
243 u32 next;
244};
245
246enum desc_status_bits {
247 DescOwn=0x8000,
248};
249
250#define PRIV_ALIGN 15 /* Required alignment mask */
251struct 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];
258
259 dma_addr_t tx_ring_dma;
260 dma_addr_t rx_ring_dma;
261
262 /* Ring pointers. */
263 spinlock_t lock; /* Group with Tx control cache line. */
264 spinlock_t napi_lock;
bea3348e 265 struct napi_struct napi;
1da177e4
LT		 266 unsigned int reschedule_in_poll;
267 unsigned int cur_tx, dirty_tx;
268
269 unsigned int cur_rx, dirty_rx;
270 u32 irq_mask;
271 unsigned int rx_buf_sz; /* Based on MTU+slack. */
272
273 struct pci_dev *pci_dev; /* PCI bus location. */
274 int chip_id, chip_flags;
275
276 struct net_device_stats stats;
277 struct timer_list timer; /* Media selection timer. */
278 int tx_threshold;
279 unsigned char mc_filter[8];
280 signed char phys[4]; /* MII device addresses. */
281 u16 advertising; /* NWay media advertisement */
282 int mii_phy_cnt;
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. */
286};
287
288static int epic_open(struct net_device *dev);
289static int read_eeprom(long ioaddr, int location);
290static int mdio_read(struct net_device *dev, int phy_id, int location);
291static void mdio_write(struct net_device *dev, int phy_id, int loc, int val);
292static void epic_restart(struct net_device *dev);
293static void epic_timer(unsigned long data);
294static void epic_tx_timeout(struct net_device *dev);
295static void epic_init_ring(struct net_device *dev);
296static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev);
297static int epic_rx(struct net_device *dev, int budget);
bea3348e 298static int epic_poll(struct napi_struct *napi, int budget);
7d12e780 299static irqreturn_t epic_interrupt(int irq, void *dev_instance);
1da177e4 300static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
7282d491 301static const struct ethtool_ops netdev_ethtool_ops;
1da177e4
LT		 302static int epic_close(struct net_device *dev);
303static struct net_device_stats *epic_get_stats(struct net_device *dev);
304static void set_rx_mode(struct net_device *dev);
305
f3b197ac 306
1da177e4
LT		 307
308static int __devinit epic_init_one (struct pci_dev *pdev,
309 const struct pci_device_id *ent)
310{
311 static int card_idx = -1;
312 long ioaddr;
313 int chip_idx = (int) ent->driver_data;
314 int irq;
315 struct net_device *dev;
316 struct epic_private *ep;
317 int i, ret, option = 0, duplex = 0;
318 void *ring_space;
319 dma_addr_t ring_dma;
320
321/* when built into the kernel, we only print version if device is found */
322#ifndef MODULE
323 static int printed_version;
324 if (!printed_version++)
2c2a8c53
MD		 325 printk (KERN_INFO "%s" KERN_INFO "%s",
326 version, version2);
1da177e4 327#endif
f3b197ac 328
1da177e4 329 card_idx++;
f3b197ac 330
1da177e4
LT		 331 ret = pci_enable_device(pdev);
332 if (ret)
333 goto out;
334 irq = pdev->irq;
335
36e1e847 336 if (pci_resource_len(pdev, 0) < EPIC_TOTAL_SIZE) {
9b91cf9d 337 dev_err(&pdev->dev, "no PCI region space\n");
1da177e4
LT		 338 ret = -ENODEV;
339 goto err_out_disable;
340 }
f3b197ac 341
1da177e4
LT		 342 pci_set_master(pdev);
343
344 ret = pci_request_regions(pdev, DRV_NAME);
345 if (ret < 0)
346 goto err_out_disable;
347
348 ret = -ENOMEM;
349
350 dev = alloc_etherdev(sizeof (*ep));
351 if (!dev) {
9b91cf9d 352 dev_err(&pdev->dev, "no memory for eth device\n");
1da177e4
LT		 353 goto err_out_free_res;
354 }
1da177e4
LT		 355 SET_NETDEV_DEV(dev, &pdev->dev);
356
357#ifdef USE_IO_OPS
358 ioaddr = pci_resource_start (pdev, 0);
359#else
360 ioaddr = pci_resource_start (pdev, 1);
361 ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1));
362 if (!ioaddr) {
9b91cf9d 363 dev_err(&pdev->dev, "ioremap failed\n");
1da177e4
LT		 364 goto err_out_free_netdev;
365 }
366#endif
367
368 pci_set_drvdata(pdev, dev);
369 ep = dev->priv;
370 ep->mii.dev = 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;
375
376 ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
377 if (!ring_space)
378 goto err_out_iounmap;
379 ep->tx_ring = (struct epic_tx_desc *)ring_space;
380 ep->tx_ring_dma = ring_dma;
381
382 ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
383 if (!ring_space)
384 goto err_out_unmap_tx;
385 ep->rx_ring = (struct epic_rx_desc *)ring_space;
386 ep->rx_ring_dma = ring_dma;
387
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];
396 }
397
398 dev->base_addr = ioaddr;
399 dev->irq = irq;
400
401 spin_lock_init(&ep->lock);
402 spin_lock_init(&ep->napi_lock);
403 ep->reschedule_in_poll = 0;
404
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);
411
412 /* Turn on the MII transceiver. */
413 outl(0x12, ioaddr + MIICfg);
414 if (chip_idx == 1)
415 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
416 outl(0x0200, ioaddr + GENCTL);
417
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));
421
422 if (debug > 2) {
2e8a538d 423 dev_printk(KERN_DEBUG, &pdev->dev, "EEPROM contents:\n");
1da177e4
LT		 424 for (i = 0; i < 64; i++)
425 printk(" %4.4x%s", read_eeprom(ioaddr, i),
426 i % 16 == 15 ? "\n" : "");
427 }
428
429 ep->pci_dev = pdev;
430 ep->chip_id = chip_idx;
431 ep->chip_flags = pci_id_tbl[chip_idx].drv_flags;
f3b197ac 432 ep->irq_mask =
1da177e4
LT		 433 (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
434 | CntFull | TxUnderrun | EpicNapiEvent;
435
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. */
439 {
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;
9b91cf9d 445 dev_info(&pdev->dev,
2e8a538d
JG		 446 "MII transceiver #%d control "
447 "%4.4x status %4.4x.\n",
448 phy, mdio_read(dev, phy, 0), mii_status);
1da177e4
LT		 449 }
450 }
451 ep->mii_phy_cnt = phy_idx;
452 if (phy_idx != 0) {
453 phy = ep->phys[0];
454 ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE);
9b91cf9d 455 dev_info(&pdev->dev,
2e8a538d 456 "Autonegotiation advertising %4.4x link "
1da177e4 457 "partner %4.4x.\n",
2e8a538d 458 ep->mii.advertising, mdio_read(dev, phy, 5));
1da177e4 459 } else if ( ! (ep->chip_flags & NO_MII)) {
9b91cf9d 460 dev_warn(&pdev->dev,
2e8a538d 461 "***WARNING***: No MII transceiver found!\n");
1da177e4
LT		 462 /* Use the known PHY address of the EPII. */
463 ep->phys[0] = 3;
464 }
465 ep->mii.phy_id = ep->phys[0];
466 }
467
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);
472
473 /* The lower four bits are the media type. */
474 if (duplex) {
475 ep->mii.force_media = ep->mii.full_duplex = 1;
9b91cf9d 476 dev_info(&pdev->dev, "Forced full duplex requested.\n");
1da177e4
LT		 477 }
478 dev->if_port = ep->default_port = option;
479
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;
bea3348e 490 netif_napi_add(dev, &ep->napi, epic_poll, 64);
1da177e4
LT		 491
492 ret = register_netdev(dev);
493 if (ret < 0)
494 goto err_out_unmap_rx;
495
496 printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ",
497 dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq);
498 for (i = 0; i < 5; i++)
499 printk("%2.2x:", dev->dev_addr[i]);
500 printk("%2.2x.\n", dev->dev_addr[i]);
501
502out:
503 return ret;
504
505err_out_unmap_rx:
506 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
507err_out_unmap_tx:
508 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
509err_out_iounmap:
510#ifndef USE_IO_OPS
511 iounmap(ioaddr);
512err_out_free_netdev:
513#endif
514 free_netdev(dev);
515err_out_free_res:
516 pci_release_regions(pdev);
517err_out_disable:
518 pci_disable_device(pdev);
519 goto out;
520}
f3b197ac 521
1da177e4
LT		 522/* Serial EEPROM section. */
523
524/* EEPROM_Ctrl bits. */
525#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
526#define EE_CS 0x02 /* EEPROM chip select. */
527#define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */
528#define EE_WRITE_0 0x01
529#define EE_WRITE_1 0x09
530#define EE_DATA_READ 0x10 /* EEPROM chip data out. */
531#define EE_ENB (0x0001 | EE_CS)
532
533/* Delay between EEPROM clock transitions.
534 This serves to flush the operation to the PCI bus.
535 */
536
537#define eeprom_delay() inl(ee_addr)
538
539/* The EEPROM commands include the alway-set leading bit. */
540#define EE_WRITE_CMD (5 << 6)
541#define EE_READ64_CMD (6 << 6)
542#define EE_READ256_CMD (6 << 8)
543#define EE_ERASE_CMD (7 << 6)
544
545static void epic_disable_int(struct net_device *dev, struct epic_private *ep)
546{
547 long ioaddr = dev->base_addr;
548
549 outl(0x00000000, ioaddr + INTMASK);
550}
551
552static inline void __epic_pci_commit(long ioaddr)
553{
554#ifndef USE_IO_OPS
555 inl(ioaddr + INTMASK);
556#endif
557}
558
559static inline void epic_napi_irq_off(struct net_device *dev,
560 struct epic_private *ep)
561{
562 long ioaddr = dev->base_addr;
563
564 outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK);
565 __epic_pci_commit(ioaddr);
566}
567
568static inline void epic_napi_irq_on(struct net_device *dev,
569 struct epic_private *ep)
570{
571 long ioaddr = dev->base_addr;
572
573 /* No need to commit possible posted write */
574 outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK);
575}
576
577static int __devinit read_eeprom(long ioaddr, int location)
578{
579 int i;
580 int retval = 0;
581 long ee_addr = ioaddr + EECTL;
582 int read_cmd = location |
583 (inl(ee_addr) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD);
584
585 outl(EE_ENB & ~EE_CS, ee_addr);
586 outl(EE_ENB, ee_addr);
587
588 /* Shift the read command bits out. */
589 for (i = 12; i >= 0; i--) {
590 short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0;
591 outl(EE_ENB | dataval, ee_addr);
592 eeprom_delay();
593 outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
594 eeprom_delay();
595 }
596 outl(EE_ENB, ee_addr);
597
598 for (i = 16; i > 0; i--) {
599 outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
600 eeprom_delay();
601 retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
602 outl(EE_ENB, ee_addr);
603 eeprom_delay();
604 }
605
606 /* Terminate the EEPROM access. */
607 outl(EE_ENB & ~EE_CS, ee_addr);
608 return retval;
609}
610
611#define MII_READOP 1
612#define MII_WRITEOP 2
613static int mdio_read(struct net_device *dev, int phy_id, int location)
614{
615 long ioaddr = dev->base_addr;
616 int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP;
617 int i;
618
619 outl(read_cmd, ioaddr + MIICtrl);
620 /* Typical operation takes 25 loops. */
621 for (i = 400; i > 0; i--) {
622 barrier();
623 if ((inl(ioaddr + MIICtrl) & MII_READOP) == 0) {
624 /* Work around read failure bug. */
625 if (phy_id == 1 && location < 6
626 && inw(ioaddr + MIIData) == 0xffff) {
627 outl(read_cmd, ioaddr + MIICtrl);
628 continue;
629 }
630 return inw(ioaddr + MIIData);
631 }
632 }
633 return 0xffff;
634}
635
636static void mdio_write(struct net_device *dev, int phy_id, int loc, int value)
637{
638 long ioaddr = dev->base_addr;
639 int i;
640
641 outw(value, ioaddr + MIIData);
642 outl((phy_id << 9) | (loc << 4) | MII_WRITEOP, ioaddr + MIICtrl);
f3b197ac 643 for (i = 10000; i > 0; i--) {
1da177e4
LT		 644 barrier();
645 if ((inl(ioaddr + MIICtrl) & MII_WRITEOP) == 0)
646 break;
647 }
648 return;
649}
650
f3b197ac 651
1da177e4
LT		 652static int epic_open(struct net_device *dev)
653{
654 struct epic_private *ep = dev->priv;
655 long ioaddr = dev->base_addr;
656 int i;
657 int retval;
658
659 /* Soft reset the chip. */
660 outl(0x4001, ioaddr + GENCTL);
661
bea3348e
SH		 662 napi_enable(&ep->napi);
663 if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev))) {
664 napi_disable(&ep->napi);
1da177e4 665 return retval;
bea3348e 666 }
1da177e4
LT		 667
668 epic_init_ring(dev);
669
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);
674
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.
679 */
680#if 0
681 outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg);
682#endif
683 if (ep->chip_flags & MII_PWRDWN)
684 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
685
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);
690#else
691 outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
692 inl(ioaddr + GENCTL);
693 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
694#endif
695
696 udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
f3b197ac 697
1da177e4
LT		 698 for (i = 0; i < 3; i++)
699 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
700
701 ep->tx_threshold = TX_FIFO_THRESH;
702 outl(ep->tx_threshold, ioaddr + TxThresh);
703
704 if (media2miictl[dev->if_port & 15]) {
705 if (ep->mii_phy_cnt)
706 mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]);
707 if (dev->if_port == 1) {
708 if (debug > 1)
709 printk(KERN_INFO "%s: Using the 10base2 transceiver, MII "
710 "status %4.4x.\n",
711 dev->name, mdio_read(dev, ep->phys[0], MII_BMSR));
712 }
713 } else {
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);
720 if (debug > 1)
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);
725 }
726 }
727
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);
731
732 /* Start the chip's Rx process. */
733 set_rx_mode(dev);
734 outl(StartRx | RxQueued, ioaddr + COMMAND);
735
736 netif_start_queue(dev);
737
738 /* Enable interrupts by setting the interrupt mask. */
739 outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170)
f3b197ac 740 | CntFull | TxUnderrun
1da177e4
LT		 741 | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK);
742
743 if (debug > 1)
744 printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x "
745 "%s-duplex.\n",
746 dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL),
747 ep->mii.full_duplex ? "full" : "half");
748
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);
756
757 return 0;
758}
759
760/* Reset the chip to recover from a PCI transaction error.
761 This may occur at interrupt time. */
762static void epic_pause(struct net_device *dev)
763{
764 long ioaddr = dev->base_addr;
765 struct epic_private *ep = dev->priv;
766
767 netif_stop_queue (dev);
f3b197ac 768
1da177e4
LT		 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);
773
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);
779 }
780
781 /* Remove the packets on the Rx queue. */
782 epic_rx(dev, RX_RING_SIZE);
783}
784
785static void epic_restart(struct net_device *dev)
786{
787 long ioaddr = dev->base_addr;
788 struct epic_private *ep = dev->priv;
789 int i;
790
791 /* Soft reset the chip. */
792 outl(0x4001, ioaddr + GENCTL);
793
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);
796 udelay(1);
797
798 /* This magic is documented in SMSC app note 7.15 */
799 for (i = 16; i > 0; i--)
800 outl(0x0008, ioaddr + TEST1);
801
802#if defined(__powerpc__) || defined(__sparc__) /* Big endian */
803 outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
804#else
805 outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL);
806#endif
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);
810
811 for (i = 0; i < 3; i++)
812 outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4);
813
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);
821
822 /* Start the chip's Rx process. */
823 set_rx_mode(dev);
824 outl(StartRx | RxQueued, ioaddr + COMMAND);
825
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);
830
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));
835 return;
836}
837
838static void check_media(struct net_device *dev)
839{
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;
845
846 if (ep->mii.force_media)
847 return;
848 if (mii_lpa == 0xffff) /* Bogus read */
849 return;
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);
856 }
857}
858
859static void epic_timer(unsigned long data)
860{
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;
865
866 if (debug > 3) {
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));
873 }
874
875 check_media(dev);
876
877 ep->timer.expires = jiffies + next_tick;
878 add_timer(&ep->timer);
879}
880
881static void epic_tx_timeout(struct net_device *dev)
882{
883 struct epic_private *ep = dev->priv;
884 long ioaddr = dev->base_addr;
885
886 if (debug > 0) {
887 printk(KERN_WARNING "%s: Transmit timeout using MII device, "
888 "Tx status %4.4x.\n",
889 dev->name, (int)inw(ioaddr + TxSTAT));
890 if (debug > 1) {
891 printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n",
892 dev->name, ep->dirty_tx, ep->cur_tx);
893 }
894 }
895 if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */
896 ep->stats.tx_fifo_errors++;
897 outl(RestartTx, ioaddr + COMMAND);
898 } else {
899 epic_restart(dev);
900 outl(TxQueued, dev->base_addr + COMMAND);
901 }
902
903 dev->trans_start = jiffies;
904 ep->stats.tx_errors++;
905 if (!ep->tx_full)
906 netif_wake_queue(dev);
907}
908
909/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
910static void epic_init_ring(struct net_device *dev)
911{
912 struct epic_private *ep = dev->priv;
913 int i;
914
915 ep->tx_full = 0;
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);
919
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);
f3b197ac 924 ep->rx_ring[i].next = ep->rx_ring_dma +
1da177e4
LT		 925 (i+1)*sizeof(struct epic_rx_desc);
926 ep->rx_skbuff[i] = NULL;
927 }
928 /* Mark the last entry as wrapping the ring. */
929 ep->rx_ring[i-1].next = ep->rx_ring_dma;
930
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;
935 if (skb == NULL)
936 break;
1da177e4 937 skb_reserve(skb, 2); /* 16 byte align the IP header. */
f3b197ac 938 ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev,
689be439 939 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1da177e4
LT		 940 ep->rx_ring[i].rxstatus = cpu_to_le32(DescOwn);
941 }
942 ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
943
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;
f3b197ac 949 ep->tx_ring[i].next = ep->tx_ring_dma +
1da177e4
LT		 950 (i+1)*sizeof(struct epic_tx_desc);
951 }
952 ep->tx_ring[i-1].next = ep->tx_ring_dma;
953 return;
954}
955
956static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev)
957{
958 struct epic_private *ep = dev->priv;
959 int entry, free_count;
960 u32 ctrl_word;
961 unsigned long flags;
f3b197ac 962
5b057c6b
HX		 963 if (skb_padto(skb, ETH_ZLEN))
964 return 0;
1da177e4
LT		 965
966 /* Caution: the write order is important here, set the field with the
967 "ownership" bit last. */
968
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;
973
974 ep->tx_skbuff[entry] = skb;
f3b197ac 975 ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data,
1da177e4
LT		 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. */
983 } else {
984 /* Leave room for an additional entry. */
985 ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */
986 ep->tx_full = 1;
987 }
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);
992
993 ep->cur_tx++;
994 if (ep->tx_full)
995 netif_stop_queue(dev);
996
997 spin_unlock_irqrestore(&ep->lock, flags);
998 /* Trigger an immediate transmit demand. */
999 outl(TxQueued, dev->base_addr + COMMAND);
1000
1001 dev->trans_start = jiffies;
1002 if (debug > 4)
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));
1007
1008 return 0;
1009}
1010
1011static void epic_tx_error(struct net_device *dev, struct epic_private *ep,
1012 int status)
1013{
1014 struct net_device_stats *stats = &ep->stats;
1015
1016#ifndef final_version
1017 /* There was an major error, log it. */
1018 if (debug > 1)
1019 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1020 dev->name, status);
1021#endif
1022 stats->tx_errors++;
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++;
1031}
1032
1033static void epic_tx(struct net_device *dev, struct epic_private *ep)
1034{
1035 unsigned int dirty_tx, cur_tx;
1036
1037 /*
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.
1040 */
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);
1046
1047 if (txstatus & DescOwn)
1048 break; /* It still hasn't been Txed */
1049
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;
1054 } else
1055 epic_tx_error(dev, ep, txstatus);
1056
1057 /* Free the original skb. */
1058 skb = ep->tx_skbuff[entry];
f3b197ac 1059 pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr,
1da177e4
LT		 1060 skb->len, PCI_DMA_TODEVICE);
1061 dev_kfree_skb_irq(skb);
1062 ep->tx_skbuff[entry] = NULL;
1063 }
1064
1065#ifndef final_version
1066 if (cur_tx - dirty_tx > TX_RING_SIZE) {
1067 printk(KERN_WARNING
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;
1071 }
1072#endif
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. */
1076 ep->tx_full = 0;
1077 netif_wake_queue(dev);
1078 }
1079}
1080
1081/* The interrupt handler does all of the Rx thread work and cleans up
1082 after the Tx thread. */
7d12e780 1083static irqreturn_t epic_interrupt(int irq, void *dev_instance)
1da177e4
LT		 1084{
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;
1089 int status;
1090
1091 status = inl(ioaddr + INTSTAT);
1092 /* Acknowledge all of the current interrupt sources ASAP. */
1093 outl(status & EpicNormalEvent, ioaddr + INTSTAT);
1094
1095 if (debug > 4) {
1096 printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new "
1097 "intstat=%#8.8x.\n", dev->name, status,
1098 (int)inl(ioaddr + INTSTAT));
1099 }
1100
1101 if ((status & IntrSummary) == 0)
1102 goto out;
1103
1104 handled = 1;
1105
1106 if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) {
1107 spin_lock(&ep->napi_lock);
bea3348e 1108 if (netif_rx_schedule_prep(dev, &ep->napi)) {
1da177e4 1109 epic_napi_irq_off(dev, ep);
bea3348e 1110 __netif_rx_schedule(dev, &ep->napi);
1da177e4
LT		 1111 } else
1112 ep->reschedule_in_poll++;
1113 spin_unlock(&ep->napi_lock);
1114 }
1115 status &= ~EpicNapiEvent;
1116
1117 /* Check uncommon events all at once. */
1118 if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) {
1119 if (status == EpicRemoved)
1120 goto out;
1121
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);
1126
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);
1132 }
1133 if (status & PCIBusErr170) {
1134 printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n",
1135 dev->name, status);
1136 epic_pause(dev);
1137 epic_restart(dev);
1138 }
1139 /* Clear all error sources. */
1140 outl(status & 0x7f18, ioaddr + INTSTAT);
1141 }
1142
1143out:
1144 if (debug > 3) {
1145 printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n",
1146 dev->name, status);
1147 }
1148
1149 return IRQ_RETVAL(handled);
1150}
1151
1152static int epic_rx(struct net_device *dev, int budget)
1153{
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;
1157 int work_done = 0;
1158
1159 if (debug > 4)
1160 printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry,
1161 ep->rx_ring[entry].rxstatus);
1162
1163 if (rx_work_limit > budget)
1164 rx_work_limit = budget;
1165
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);
1169
1170 if (debug > 4)
1171 printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status);
1172 if (--rx_work_limit < 0)
1173 break;
1174 if (status & 0x2006) {
1175 if (debug > 2)
1176 printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n",
1177 dev->name, status);
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++;
1185 } else {
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;
1190
1191 if (pkt_len > PKT_BUF_SZ - 4) {
1192 printk(KERN_ERR "%s: Oversized Ethernet frame, status %x "
1193 "%d bytes.\n",
1194 dev->name, status, pkt_len);
1195 pkt_len = 1514;
1196 }
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) {
1da177e4
LT		 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,
1204 ep->rx_buf_sz,
1205 PCI_DMA_FROMDEVICE);
8c7b7faa 1206 skb_copy_to_linear_data(skb, ep->rx_skbuff[entry]->data, pkt_len);
1da177e4
LT		 1207 skb_put(skb, pkt_len);
1208 pci_dma_sync_single_for_device(ep->pci_dev,
1209 ep->rx_ring[entry].bufaddr,
1210 ep->rx_buf_sz,
1211 PCI_DMA_FROMDEVICE);
1212 } else {
f3b197ac
JG		 1213 pci_unmap_single(ep->pci_dev,
1214 ep->rx_ring[entry].bufaddr,
1da177e4
LT		 1215 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1216 skb_put(skb = ep->rx_skbuff[entry], pkt_len);
1217 ep->rx_skbuff[entry] = NULL;
1218 }
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;
1224 }
1225 work_done++;
1226 entry = (++ep->cur_rx) % RX_RING_SIZE;
1227 }
1228
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);
1235 if (skb == NULL)
1236 break;
1da177e4 1237 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
f3b197ac 1238 ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev,
689be439 1239 skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1da177e4
LT		 1240 work_done++;
1241 }
1242 ep->rx_ring[entry].rxstatus = cpu_to_le32(DescOwn);
1243 }
1244 return work_done;
1245}
1246
1247static void epic_rx_err(struct net_device *dev, struct epic_private *ep)
1248{
1249 long ioaddr = dev->base_addr;
1250 int status;
1251
1252 status = inl(ioaddr + INTSTAT);
1253
1254 if (status == EpicRemoved)
1255 return;
1256 if (status & RxOverflow) /* Missed a Rx frame. */
1257 ep->stats.rx_errors++;
1258 if (status & (RxOverflow | RxFull))
1259 outw(RxQueued, ioaddr + COMMAND);
1260}
1261
bea3348e 1262static int epic_poll(struct napi_struct *napi, int budget)
1da177e4 1263{
bea3348e
SH		 1264 struct epic_private *ep = container_of(napi, struct epic_private, napi);
1265 struct net_device *dev = ep->mii.dev;
1266 int work_done = 0;
1da177e4
LT		 1267 long ioaddr = dev->base_addr;
1268
1da177e4
LT		 1269rx_action:
1270
1271 epic_tx(dev, ep);
1272
bea3348e 1273 work_done += epic_rx(dev, budget);
1da177e4
LT		 1274
1275 epic_rx_err(dev, ep);
1276
bea3348e 1277 if (netif_running(dev) && (work_done < budget)) {
1da177e4
LT		 1278 unsigned long flags;
1279 int more;
1280
1281 /* A bit baroque but it avoids a (space hungry) spin_unlock */
1282
1283 spin_lock_irqsave(&ep->napi_lock, flags);
1284
1285 more = ep->reschedule_in_poll;
1286 if (!more) {
bea3348e 1287 __netif_rx_complete(dev, napi);
1da177e4
LT		 1288 outl(EpicNapiEvent, ioaddr + INTSTAT);
1289 epic_napi_irq_on(dev, ep);
1290 } else
1291 ep->reschedule_in_poll--;
1292
1293 spin_unlock_irqrestore(&ep->napi_lock, flags);
1294
1295 if (more)
1296 goto rx_action;
1297 }
1298
bea3348e 1299 return work_done;
1da177e4
LT		 1300}
1301
1302static int epic_close(struct net_device *dev)
1303{
1304 long ioaddr = dev->base_addr;
1305 struct epic_private *ep = dev->priv;
1306 struct sk_buff *skb;
1307 int i;
1308
1309 netif_stop_queue(dev);
bea3348e 1310 napi_disable(&ep->napi);
1da177e4
LT		 1311
1312 if (debug > 1)
1313 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
1314 dev->name, (int)inl(ioaddr + INTSTAT));
1315
1316 del_timer_sync(&ep->timer);
1317
1318 epic_disable_int(dev, ep);
1319
1320 free_irq(dev->irq, dev);
1321
1322 epic_pause(dev);
1323
1324 /* Free all the skbuffs in the Rx queue. */
1325 for (i = 0; i < RX_RING_SIZE; i++) {
1326 skb = ep->rx_skbuff[i];
1327 ep->rx_skbuff[i] = NULL;
1328 ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */
1329 ep->rx_ring[i].buflength = 0;
1330 if (skb) {
f3b197ac 1331 pci_unmap_single(ep->pci_dev, ep->rx_ring[i].bufaddr,
1da177e4
LT		 1332 ep->rx_buf_sz, PCI_DMA_FROMDEVICE);
1333 dev_kfree_skb(skb);
1334 }
1335 ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */
1336 }
1337 for (i = 0; i < TX_RING_SIZE; i++) {
1338 skb = ep->tx_skbuff[i];
1339 ep->tx_skbuff[i] = NULL;
1340 if (!skb)
1341 continue;
f3b197ac 1342 pci_unmap_single(ep->pci_dev, ep->tx_ring[i].bufaddr,
1da177e4
LT		 1343 skb->len, PCI_DMA_TODEVICE);
1344 dev_kfree_skb(skb);
1345 }
1346
1347 /* Green! Leave the chip in low-power mode. */
1348 outl(0x0008, ioaddr + GENCTL);
1349
1350 return 0;
1351}
1352
1353static struct net_device_stats *epic_get_stats(struct net_device *dev)
1354{
1355 struct epic_private *ep = dev->priv;
1356 long ioaddr = dev->base_addr;
1357
1358 if (netif_running(dev)) {
1359 /* Update the error counts. */
1360 ep->stats.rx_missed_errors += inb(ioaddr + MPCNT);
1361 ep->stats.rx_frame_errors += inb(ioaddr + ALICNT);
1362 ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT);
1363 }
1364
1365 return &ep->stats;
1366}
1367
1368/* Set or clear the multicast filter for this adaptor.
1369 Note that we only use exclusion around actually queueing the
1370 new frame, not around filling ep->setup_frame. This is non-deterministic
1371 when re-entered but still correct. */
1372
1373static void set_rx_mode(struct net_device *dev)
1374{
1375 long ioaddr = dev->base_addr;
1376 struct epic_private *ep = dev->priv;
1377 unsigned char mc_filter[8]; /* Multicast hash filter */
1378 int i;
1379
1380 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1381 outl(0x002C, ioaddr + RxCtrl);
1382 /* Unconditionally log net taps. */
1da177e4
LT		 1383 memset(mc_filter, 0xff, sizeof(mc_filter));
1384 } else if ((dev->mc_count > 0) || (dev->flags & IFF_ALLMULTI)) {
1385 /* There is apparently a chip bug, so the multicast filter
1386 is never enabled. */
1387 /* Too many to filter perfectly -- accept all multicasts. */
1388 memset(mc_filter, 0xff, sizeof(mc_filter));
1389 outl(0x000C, ioaddr + RxCtrl);
1390 } else if (dev->mc_count == 0) {
1391 outl(0x0004, ioaddr + RxCtrl);
1392 return;
1393 } else { /* Never executed, for now. */
1394 struct dev_mc_list *mclist;
1395
1396 memset(mc_filter, 0, sizeof(mc_filter));
1397 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1398 i++, mclist = mclist->next) {
1399 unsigned int bit_nr =
1400 ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f;
1401 mc_filter[bit_nr >> 3] |= (1 << bit_nr);
1402 }
1403 }
1404 /* ToDo: perhaps we need to stop the Tx and Rx process here? */
1405 if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) {
1406 for (i = 0; i < 4; i++)
1407 outw(((u16 *)mc_filter)[i], ioaddr + MC0 + i*4);
1408 memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter));
1409 }
1410 return;
1411}
1412
1413static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1414{
1415 struct epic_private *np = dev->priv;
1416
1417 strcpy (info->driver, DRV_NAME);
1418 strcpy (info->version, DRV_VERSION);
1419 strcpy (info->bus_info, pci_name(np->pci_dev));
1420}
1421
1422static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1423{
1424 struct epic_private *np = dev->priv;
1425 int rc;
1426
1427 spin_lock_irq(&np->lock);
1428 rc = mii_ethtool_gset(&np->mii, cmd);
1429 spin_unlock_irq(&np->lock);
1430
1431 return rc;
1432}
1433
1434static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1435{
1436 struct epic_private *np = dev->priv;
1437 int rc;
1438
1439 spin_lock_irq(&np->lock);
1440 rc = mii_ethtool_sset(&np->mii, cmd);
1441 spin_unlock_irq(&np->lock);
1442
1443 return rc;
1444}
1445
1446static int netdev_nway_reset(struct net_device *dev)
1447{
1448 struct epic_private *np = dev->priv;
1449 return mii_nway_restart(&np->mii);
1450}
1451
1452static u32 netdev_get_link(struct net_device *dev)
1453{
1454 struct epic_private *np = dev->priv;
1455 return mii_link_ok(&np->mii);
1456}
1457
1458static u32 netdev_get_msglevel(struct net_device *dev)
1459{
1460 return debug;
1461}
1462
1463static void netdev_set_msglevel(struct net_device *dev, u32 value)
1464{
1465 debug = value;
1466}
1467
1468static int ethtool_begin(struct net_device *dev)
1469{
1470 unsigned long ioaddr = dev->base_addr;
1471 /* power-up, if interface is down */
1472 if (! netif_running(dev)) {
1473 outl(0x0200, ioaddr + GENCTL);
1474 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1475 }
1476 return 0;
1477}
1478
1479static void ethtool_complete(struct net_device *dev)
1480{
1481 unsigned long ioaddr = dev->base_addr;
1482 /* power-down, if interface is down */
1483 if (! netif_running(dev)) {
1484 outl(0x0008, ioaddr + GENCTL);
1485 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1486 }
1487}
1488
7282d491 1489static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4
LT		 1490 .get_drvinfo = netdev_get_drvinfo,
1491 .get_settings = netdev_get_settings,
1492 .set_settings = netdev_set_settings,
1493 .nway_reset = netdev_nway_reset,
1494 .get_link = netdev_get_link,
1495 .get_msglevel = netdev_get_msglevel,
1496 .set_msglevel = netdev_set_msglevel,
1da177e4
LT		 1497 .begin = ethtool_begin,
1498 .complete = ethtool_complete
1499};
1500
1501static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1502{
1503 struct epic_private *np = dev->priv;
1504 long ioaddr = dev->base_addr;
1505 struct mii_ioctl_data *data = if_mii(rq);
1506 int rc;
1507
1508 /* power-up, if interface is down */
1509 if (! netif_running(dev)) {
1510 outl(0x0200, ioaddr + GENCTL);
1511 outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL);
1512 }
1513
1514 /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */
1515 spin_lock_irq(&np->lock);
1516 rc = generic_mii_ioctl(&np->mii, data, cmd, NULL);
1517 spin_unlock_irq(&np->lock);
1518
1519 /* power-down, if interface is down */
1520 if (! netif_running(dev)) {
1521 outl(0x0008, ioaddr + GENCTL);
1522 outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL);
1523 }
1524 return rc;
1525}
1526
1527
1528static void __devexit epic_remove_one (struct pci_dev *pdev)
1529{
1530 struct net_device *dev = pci_get_drvdata(pdev);
1531 struct epic_private *ep = dev->priv;
f3b197ac 1532
1da177e4
LT		 1533 pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma);
1534 pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma);
1535 unregister_netdev(dev);
1536#ifndef USE_IO_OPS
1537 iounmap((void*) dev->base_addr);
1538#endif
1539 pci_release_regions(pdev);
1540 free_netdev(dev);
1541 pci_disable_device(pdev);
1542 pci_set_drvdata(pdev, NULL);
1543 /* pci_power_off(pdev, -1); */
1544}
1545
1546
1547#ifdef CONFIG_PM
1548
1549static int epic_suspend (struct pci_dev *pdev, pm_message_t state)
1550{
1551 struct net_device *dev = pci_get_drvdata(pdev);
1552 long ioaddr = dev->base_addr;
1553
1554 if (!netif_running(dev))
1555 return 0;
1556 epic_pause(dev);
1557 /* Put the chip into low-power mode. */
1558 outl(0x0008, ioaddr + GENCTL);
1559 /* pci_power_off(pdev, -1); */
1560 return 0;
1561}
1562
1563
1564static int epic_resume (struct pci_dev *pdev)
1565{
1566 struct net_device *dev = pci_get_drvdata(pdev);
1567
1568 if (!netif_running(dev))
1569 return 0;
1570 epic_restart(dev);
1571 /* pci_power_on(pdev); */
1572 return 0;
1573}
1574
1575#endif /* CONFIG_PM */
1576
1577
1578static struct pci_driver epic_driver = {
1579 .name = DRV_NAME,
1580 .id_table = epic_pci_tbl,
1581 .probe = epic_init_one,
1582 .remove = __devexit_p(epic_remove_one),
1583#ifdef CONFIG_PM
1584 .suspend = epic_suspend,
1585 .resume = epic_resume,
1586#endif /* CONFIG_PM */
1587};
1588
1589
1590static int __init epic_init (void)
1591{
1592/* when a module, this is printed whether or not devices are found in probe */
1593#ifdef MODULE
2c2a8c53
MD		 1594 printk (KERN_INFO "%s" KERN_INFO "%s",
1595 version, version2);
1da177e4
LT		 1596#endif
1597
29917620 1598 return pci_register_driver(&epic_driver);
1da177e4
LT		 1599}
1600
1601
1602static void __exit epic_cleanup (void)
1603{
1604 pci_unregister_driver (&epic_driver);
1605}
1606
1607
1608module_init(epic_init);
1609module_exit(epic_cleanup);
Linux kernel - Deliverables
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