[PATCH] Janitor: drivers/net/pcnet32: fix incorrect comments
[linux-2.6.git] / drivers / net / pcnet32.c
1 /* pcnet32.c: An AMD PCnet32 ethernet driver for linux. */
2 /*
3  *      Copyright 1996-1999 Thomas Bogendoerfer
4  *
5  *      Derived from the lance driver written 1993,1994,1995 by Donald Becker.
6  *
7  *      Copyright 1993 United States Government as represented by the
8  *      Director, National Security Agency.
9  *
10  *      This software may be used and distributed according to the terms
11  *      of the GNU General Public License, incorporated herein by reference.
12  *
13  *      This driver is for PCnet32 and PCnetPCI based ethercards
14  */
15 /**************************************************************************
16  *  23 Oct, 2000.
17  *  Fixed a few bugs, related to running the controller in 32bit mode.
18  *
19  *  Carsten Langgaard, carstenl@mips.com
20  *  Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
21  *
22  *************************************************************************/
23
24 #define DRV_NAME        "pcnet32"
25 #define DRV_VERSION     "1.32"
26 #define DRV_RELDATE     "18.Mar.2006"
27 #define PFX             DRV_NAME ": "
28
29 static const char *const version =
30     DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " tsbogend@alpha.franken.de\n";
31
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/string.h>
35 #include <linux/errno.h>
36 #include <linux/ioport.h>
37 #include <linux/slab.h>
38 #include <linux/interrupt.h>
39 #include <linux/pci.h>
40 #include <linux/delay.h>
41 #include <linux/init.h>
42 #include <linux/ethtool.h>
43 #include <linux/mii.h>
44 #include <linux/crc32.h>
45 #include <linux/netdevice.h>
46 #include <linux/etherdevice.h>
47 #include <linux/skbuff.h>
48 #include <linux/spinlock.h>
49 #include <linux/moduleparam.h>
50 #include <linux/bitops.h>
51
52 #include <asm/dma.h>
53 #include <asm/io.h>
54 #include <asm/uaccess.h>
55 #include <asm/irq.h>
56
57 /*
58  * PCI device identifiers for "new style" Linux PCI Device Drivers
59  */
60 static struct pci_device_id pcnet32_pci_tbl[] = {
61         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE_HOME,
62           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
63         { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_LANCE,
64           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
65
66         /*
67          * Adapters that were sold with IBM's RS/6000 or pSeries hardware have
68          * the incorrect vendor id.
69          */
70         { PCI_VENDOR_ID_TRIDENT, PCI_DEVICE_ID_AMD_LANCE,
71           PCI_ANY_ID, PCI_ANY_ID,
72           PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, 0},
73
74         { }     /* terminate list */
75 };
76
77 MODULE_DEVICE_TABLE(pci, pcnet32_pci_tbl);
78
79 static int cards_found;
80
81 /*
82  * VLB I/O addresses
83  */
84 static unsigned int pcnet32_portlist[] __initdata =
85     { 0x300, 0x320, 0x340, 0x360, 0 };
86
87 static int pcnet32_debug = 0;
88 static int tx_start = 1;        /* Mapping -- 0:20, 1:64, 2:128, 3:~220 (depends on chip vers) */
89 static int pcnet32vlb;          /* check for VLB cards ? */
90
91 static struct net_device *pcnet32_dev;
92
93 static int max_interrupt_work = 2;
94 static int rx_copybreak = 200;
95
96 #define PCNET32_PORT_AUI      0x00
97 #define PCNET32_PORT_10BT     0x01
98 #define PCNET32_PORT_GPSI     0x02
99 #define PCNET32_PORT_MII      0x03
100
101 #define PCNET32_PORT_PORTSEL  0x03
102 #define PCNET32_PORT_ASEL     0x04
103 #define PCNET32_PORT_100      0x40
104 #define PCNET32_PORT_FD       0x80
105
106 #define PCNET32_DMA_MASK 0xffffffff
107
108 #define PCNET32_WATCHDOG_TIMEOUT (jiffies + (2 * HZ))
109 #define PCNET32_BLINK_TIMEOUT   (jiffies + (HZ/4))
110
111 /*
112  * table to translate option values from tulip
113  * to internal options
114  */
115 static const unsigned char options_mapping[] = {
116         PCNET32_PORT_ASEL,                      /*  0 Auto-select      */
117         PCNET32_PORT_AUI,                       /*  1 BNC/AUI          */
118         PCNET32_PORT_AUI,                       /*  2 AUI/BNC          */
119         PCNET32_PORT_ASEL,                      /*  3 not supported    */
120         PCNET32_PORT_10BT | PCNET32_PORT_FD,    /*  4 10baseT-FD       */
121         PCNET32_PORT_ASEL,                      /*  5 not supported    */
122         PCNET32_PORT_ASEL,                      /*  6 not supported    */
123         PCNET32_PORT_ASEL,                      /*  7 not supported    */
124         PCNET32_PORT_ASEL,                      /*  8 not supported    */
125         PCNET32_PORT_MII,                       /*  9 MII 10baseT      */
126         PCNET32_PORT_MII | PCNET32_PORT_FD,     /* 10 MII 10baseT-FD   */
127         PCNET32_PORT_MII,                       /* 11 MII (autosel)    */
128         PCNET32_PORT_10BT,                      /* 12 10BaseT          */
129         PCNET32_PORT_MII | PCNET32_PORT_100,    /* 13 MII 100BaseTx    */
130                                                 /* 14 MII 100BaseTx-FD */
131         PCNET32_PORT_MII | PCNET32_PORT_100 | PCNET32_PORT_FD,
132         PCNET32_PORT_ASEL                       /* 15 not supported    */
133 };
134
135 static const char pcnet32_gstrings_test[][ETH_GSTRING_LEN] = {
136         "Loopback test  (offline)"
137 };
138
139 #define PCNET32_TEST_LEN (sizeof(pcnet32_gstrings_test) / ETH_GSTRING_LEN)
140
141 #define PCNET32_NUM_REGS 136
142
143 #define MAX_UNITS 8             /* More are supported, limit only on options */
144 static int options[MAX_UNITS];
145 static int full_duplex[MAX_UNITS];
146 static int homepna[MAX_UNITS];
147
148 /*
149  *                              Theory of Operation
150  *
151  * This driver uses the same software structure as the normal lance
152  * driver. So look for a verbose description in lance.c. The differences
153  * to the normal lance driver is the use of the 32bit mode of PCnet32
154  * and PCnetPCI chips. Because these chips are 32bit chips, there is no
155  * 16MB limitation and we don't need bounce buffers.
156  */
157
158 /*
159  * Set the number of Tx and Rx buffers, using Log_2(# buffers).
160  * Reasonable default values are 4 Tx buffers, and 16 Rx buffers.
161  * That translates to 2 (4 == 2^^2) and 4 (16 == 2^^4).
162  */
163 #ifndef PCNET32_LOG_TX_BUFFERS
164 #define PCNET32_LOG_TX_BUFFERS          4
165 #define PCNET32_LOG_RX_BUFFERS          5
166 #define PCNET32_LOG_MAX_TX_BUFFERS      9       /* 2^9 == 512 */
167 #define PCNET32_LOG_MAX_RX_BUFFERS      9
168 #endif
169
170 #define TX_RING_SIZE            (1 << (PCNET32_LOG_TX_BUFFERS))
171 #define TX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_TX_BUFFERS))
172
173 #define RX_RING_SIZE            (1 << (PCNET32_LOG_RX_BUFFERS))
174 #define RX_MAX_RING_SIZE        (1 << (PCNET32_LOG_MAX_RX_BUFFERS))
175
176 #define PKT_BUF_SZ              1544
177
178 /* Offsets from base I/O address. */
179 #define PCNET32_WIO_RDP         0x10
180 #define PCNET32_WIO_RAP         0x12
181 #define PCNET32_WIO_RESET       0x14
182 #define PCNET32_WIO_BDP         0x16
183
184 #define PCNET32_DWIO_RDP        0x10
185 #define PCNET32_DWIO_RAP        0x14
186 #define PCNET32_DWIO_RESET      0x18
187 #define PCNET32_DWIO_BDP        0x1C
188
189 #define PCNET32_TOTAL_SIZE      0x20
190
191 /* The PCNET32 Rx and Tx ring descriptors. */
192 struct pcnet32_rx_head {
193         u32     base;
194         s16     buf_length;
195         s16     status;
196         u32     msg_length;
197         u32     reserved;
198 };
199
200 struct pcnet32_tx_head {
201         u32     base;
202         s16     length;
203         s16     status;
204         u32     misc;
205         u32     reserved;
206 };
207
208 /* The PCNET32 32-Bit initialization block, described in databook. */
209 struct pcnet32_init_block {
210         u16     mode;
211         u16     tlen_rlen;
212         u8      phys_addr[6];
213         u16     reserved;
214         u32     filter[2];
215         /* Receive and transmit ring base, along with extra bits. */
216         u32     rx_ring;
217         u32     tx_ring;
218 };
219
220 /* PCnet32 access functions */
221 struct pcnet32_access {
222         u16     (*read_csr) (unsigned long, int);
223         void    (*write_csr) (unsigned long, int, u16);
224         u16     (*read_bcr) (unsigned long, int);
225         void    (*write_bcr) (unsigned long, int, u16);
226         u16     (*read_rap) (unsigned long);
227         void    (*write_rap) (unsigned long, u16);
228         void    (*reset) (unsigned long);
229 };
230
231 /*
232  * The first field of pcnet32_private is read by the ethernet device
233  * so the structure should be allocated using pci_alloc_consistent().
234  */
235 struct pcnet32_private {
236         struct pcnet32_init_block init_block;
237         /* The Tx and Rx ring entries must be aligned on 16-byte boundaries in 32bit mode. */
238         struct pcnet32_rx_head  *rx_ring;
239         struct pcnet32_tx_head  *tx_ring;
240         dma_addr_t              dma_addr;/* DMA address of beginning of this
241                                    object, returned by pci_alloc_consistent */
242         struct pci_dev          *pci_dev;
243         const char              *name;
244         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
245         struct sk_buff          **tx_skbuff;
246         struct sk_buff          **rx_skbuff;
247         dma_addr_t              *tx_dma_addr;
248         dma_addr_t              *rx_dma_addr;
249         struct pcnet32_access   a;
250         spinlock_t              lock;           /* Guard lock */
251         unsigned int            cur_rx, cur_tx; /* The next free ring entry */
252         unsigned int            rx_ring_size;   /* current rx ring size */
253         unsigned int            tx_ring_size;   /* current tx ring size */
254         unsigned int            rx_mod_mask;    /* rx ring modular mask */
255         unsigned int            tx_mod_mask;    /* tx ring modular mask */
256         unsigned short          rx_len_bits;
257         unsigned short          tx_len_bits;
258         dma_addr_t              rx_ring_dma_addr;
259         dma_addr_t              tx_ring_dma_addr;
260         unsigned int            dirty_rx,       /* ring entries to be freed. */
261                                 dirty_tx;
262
263         struct net_device_stats stats;
264         char                    tx_full;
265         char                    phycount;       /* number of phys found */
266         int                     options;
267         unsigned int            shared_irq:1,   /* shared irq possible */
268                                 dxsuflo:1,   /* disable transmit stop on uflo */
269                                 mii:1;          /* mii port available */
270         struct net_device       *next;
271         struct mii_if_info      mii_if;
272         struct timer_list       watchdog_timer;
273         struct timer_list       blink_timer;
274         u32                     msg_enable;     /* debug message level */
275
276         /* each bit indicates an available PHY */
277         u32                     phymask;
278 };
279
280 static void pcnet32_probe_vlbus(void);
281 static int pcnet32_probe_pci(struct pci_dev *, const struct pci_device_id *);
282 static int pcnet32_probe1(unsigned long, int, struct pci_dev *);
283 static int pcnet32_open(struct net_device *);
284 static int pcnet32_init_ring(struct net_device *);
285 static int pcnet32_start_xmit(struct sk_buff *, struct net_device *);
286 static int pcnet32_rx(struct net_device *);
287 static void pcnet32_tx_timeout(struct net_device *dev);
288 static irqreturn_t pcnet32_interrupt(int, void *, struct pt_regs *);
289 static int pcnet32_close(struct net_device *);
290 static struct net_device_stats *pcnet32_get_stats(struct net_device *);
291 static void pcnet32_load_multicast(struct net_device *dev);
292 static void pcnet32_set_multicast_list(struct net_device *);
293 static int pcnet32_ioctl(struct net_device *, struct ifreq *, int);
294 static void pcnet32_watchdog(struct net_device *);
295 static int mdio_read(struct net_device *dev, int phy_id, int reg_num);
296 static void mdio_write(struct net_device *dev, int phy_id, int reg_num,
297                        int val);
298 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits);
299 static void pcnet32_ethtool_test(struct net_device *dev,
300                                  struct ethtool_test *eth_test, u64 * data);
301 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1);
302 static int pcnet32_phys_id(struct net_device *dev, u32 data);
303 static void pcnet32_led_blink_callback(struct net_device *dev);
304 static int pcnet32_get_regs_len(struct net_device *dev);
305 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
306                              void *ptr);
307 static void pcnet32_purge_tx_ring(struct net_device *dev);
308 static int pcnet32_alloc_ring(struct net_device *dev, char *name);
309 static void pcnet32_free_ring(struct net_device *dev);
310 static void pcnet32_check_media(struct net_device *dev, int verbose);
311
312 enum pci_flags_bit {
313         PCI_USES_IO = 1, PCI_USES_MEM = 2, PCI_USES_MASTER = 4,
314         PCI_ADDR0 = 0x10 << 0, PCI_ADDR1 = 0x10 << 1, PCI_ADDR2 =
315             0x10 << 2, PCI_ADDR3 = 0x10 << 3,
316 };
317
318 static u16 pcnet32_wio_read_csr(unsigned long addr, int index)
319 {
320         outw(index, addr + PCNET32_WIO_RAP);
321         return inw(addr + PCNET32_WIO_RDP);
322 }
323
324 static void pcnet32_wio_write_csr(unsigned long addr, int index, u16 val)
325 {
326         outw(index, addr + PCNET32_WIO_RAP);
327         outw(val, addr + PCNET32_WIO_RDP);
328 }
329
330 static u16 pcnet32_wio_read_bcr(unsigned long addr, int index)
331 {
332         outw(index, addr + PCNET32_WIO_RAP);
333         return inw(addr + PCNET32_WIO_BDP);
334 }
335
336 static void pcnet32_wio_write_bcr(unsigned long addr, int index, u16 val)
337 {
338         outw(index, addr + PCNET32_WIO_RAP);
339         outw(val, addr + PCNET32_WIO_BDP);
340 }
341
342 static u16 pcnet32_wio_read_rap(unsigned long addr)
343 {
344         return inw(addr + PCNET32_WIO_RAP);
345 }
346
347 static void pcnet32_wio_write_rap(unsigned long addr, u16 val)
348 {
349         outw(val, addr + PCNET32_WIO_RAP);
350 }
351
352 static void pcnet32_wio_reset(unsigned long addr)
353 {
354         inw(addr + PCNET32_WIO_RESET);
355 }
356
357 static int pcnet32_wio_check(unsigned long addr)
358 {
359         outw(88, addr + PCNET32_WIO_RAP);
360         return (inw(addr + PCNET32_WIO_RAP) == 88);
361 }
362
363 static struct pcnet32_access pcnet32_wio = {
364         .read_csr = pcnet32_wio_read_csr,
365         .write_csr = pcnet32_wio_write_csr,
366         .read_bcr = pcnet32_wio_read_bcr,
367         .write_bcr = pcnet32_wio_write_bcr,
368         .read_rap = pcnet32_wio_read_rap,
369         .write_rap = pcnet32_wio_write_rap,
370         .reset = pcnet32_wio_reset
371 };
372
373 static u16 pcnet32_dwio_read_csr(unsigned long addr, int index)
374 {
375         outl(index, addr + PCNET32_DWIO_RAP);
376         return (inl(addr + PCNET32_DWIO_RDP) & 0xffff);
377 }
378
379 static void pcnet32_dwio_write_csr(unsigned long addr, int index, u16 val)
380 {
381         outl(index, addr + PCNET32_DWIO_RAP);
382         outl(val, addr + PCNET32_DWIO_RDP);
383 }
384
385 static u16 pcnet32_dwio_read_bcr(unsigned long addr, int index)
386 {
387         outl(index, addr + PCNET32_DWIO_RAP);
388         return (inl(addr + PCNET32_DWIO_BDP) & 0xffff);
389 }
390
391 static void pcnet32_dwio_write_bcr(unsigned long addr, int index, u16 val)
392 {
393         outl(index, addr + PCNET32_DWIO_RAP);
394         outl(val, addr + PCNET32_DWIO_BDP);
395 }
396
397 static u16 pcnet32_dwio_read_rap(unsigned long addr)
398 {
399         return (inl(addr + PCNET32_DWIO_RAP) & 0xffff);
400 }
401
402 static void pcnet32_dwio_write_rap(unsigned long addr, u16 val)
403 {
404         outl(val, addr + PCNET32_DWIO_RAP);
405 }
406
407 static void pcnet32_dwio_reset(unsigned long addr)
408 {
409         inl(addr + PCNET32_DWIO_RESET);
410 }
411
412 static int pcnet32_dwio_check(unsigned long addr)
413 {
414         outl(88, addr + PCNET32_DWIO_RAP);
415         return ((inl(addr + PCNET32_DWIO_RAP) & 0xffff) == 88);
416 }
417
418 static struct pcnet32_access pcnet32_dwio = {
419         .read_csr = pcnet32_dwio_read_csr,
420         .write_csr = pcnet32_dwio_write_csr,
421         .read_bcr = pcnet32_dwio_read_bcr,
422         .write_bcr = pcnet32_dwio_write_bcr,
423         .read_rap = pcnet32_dwio_read_rap,
424         .write_rap = pcnet32_dwio_write_rap,
425         .reset = pcnet32_dwio_reset
426 };
427
428 #ifdef CONFIG_NET_POLL_CONTROLLER
429 static void pcnet32_poll_controller(struct net_device *dev)
430 {
431         disable_irq(dev->irq);
432         pcnet32_interrupt(0, dev, NULL);
433         enable_irq(dev->irq);
434 }
435 #endif
436
437 static int pcnet32_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
438 {
439         struct pcnet32_private *lp = dev->priv;
440         unsigned long flags;
441         int r = -EOPNOTSUPP;
442
443         if (lp->mii) {
444                 spin_lock_irqsave(&lp->lock, flags);
445                 mii_ethtool_gset(&lp->mii_if, cmd);
446                 spin_unlock_irqrestore(&lp->lock, flags);
447                 r = 0;
448         }
449         return r;
450 }
451
452 static int pcnet32_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
453 {
454         struct pcnet32_private *lp = dev->priv;
455         unsigned long flags;
456         int r = -EOPNOTSUPP;
457
458         if (lp->mii) {
459                 spin_lock_irqsave(&lp->lock, flags);
460                 r = mii_ethtool_sset(&lp->mii_if, cmd);
461                 spin_unlock_irqrestore(&lp->lock, flags);
462         }
463         return r;
464 }
465
466 static void pcnet32_get_drvinfo(struct net_device *dev,
467                                 struct ethtool_drvinfo *info)
468 {
469         struct pcnet32_private *lp = dev->priv;
470
471         strcpy(info->driver, DRV_NAME);
472         strcpy(info->version, DRV_VERSION);
473         if (lp->pci_dev)
474                 strcpy(info->bus_info, pci_name(lp->pci_dev));
475         else
476                 sprintf(info->bus_info, "VLB 0x%lx", dev->base_addr);
477 }
478
479 static u32 pcnet32_get_link(struct net_device *dev)
480 {
481         struct pcnet32_private *lp = dev->priv;
482         unsigned long flags;
483         int r;
484
485         spin_lock_irqsave(&lp->lock, flags);
486         if (lp->mii) {
487                 r = mii_link_ok(&lp->mii_if);
488         } else {
489                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
490                 r = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
491         }
492         spin_unlock_irqrestore(&lp->lock, flags);
493
494         return r;
495 }
496
497 static u32 pcnet32_get_msglevel(struct net_device *dev)
498 {
499         struct pcnet32_private *lp = dev->priv;
500         return lp->msg_enable;
501 }
502
503 static void pcnet32_set_msglevel(struct net_device *dev, u32 value)
504 {
505         struct pcnet32_private *lp = dev->priv;
506         lp->msg_enable = value;
507 }
508
509 static int pcnet32_nway_reset(struct net_device *dev)
510 {
511         struct pcnet32_private *lp = dev->priv;
512         unsigned long flags;
513         int r = -EOPNOTSUPP;
514
515         if (lp->mii) {
516                 spin_lock_irqsave(&lp->lock, flags);
517                 r = mii_nway_restart(&lp->mii_if);
518                 spin_unlock_irqrestore(&lp->lock, flags);
519         }
520         return r;
521 }
522
523 static void pcnet32_get_ringparam(struct net_device *dev,
524                                   struct ethtool_ringparam *ering)
525 {
526         struct pcnet32_private *lp = dev->priv;
527
528         ering->tx_max_pending = TX_MAX_RING_SIZE - 1;
529         ering->tx_pending = lp->tx_ring_size - 1;
530         ering->rx_max_pending = RX_MAX_RING_SIZE - 1;
531         ering->rx_pending = lp->rx_ring_size - 1;
532 }
533
534 static int pcnet32_set_ringparam(struct net_device *dev,
535                                  struct ethtool_ringparam *ering)
536 {
537         struct pcnet32_private *lp = dev->priv;
538         unsigned long flags;
539         int i;
540
541         if (ering->rx_mini_pending || ering->rx_jumbo_pending)
542                 return -EINVAL;
543
544         if (netif_running(dev))
545                 pcnet32_close(dev);
546
547         spin_lock_irqsave(&lp->lock, flags);
548         pcnet32_free_ring(dev);
549         lp->tx_ring_size =
550             min(ering->tx_pending, (unsigned int)TX_MAX_RING_SIZE);
551         lp->rx_ring_size =
552             min(ering->rx_pending, (unsigned int)RX_MAX_RING_SIZE);
553
554         /* set the minimum ring size to 4, to allow the loopback test to work
555          * unchanged.
556          */
557         for (i = 2; i <= PCNET32_LOG_MAX_TX_BUFFERS; i++) {
558                 if (lp->tx_ring_size <= (1 << i))
559                         break;
560         }
561         lp->tx_ring_size = (1 << i);
562         lp->tx_mod_mask = lp->tx_ring_size - 1;
563         lp->tx_len_bits = (i << 12);
564
565         for (i = 2; i <= PCNET32_LOG_MAX_RX_BUFFERS; i++) {
566                 if (lp->rx_ring_size <= (1 << i))
567                         break;
568         }
569         lp->rx_ring_size = (1 << i);
570         lp->rx_mod_mask = lp->rx_ring_size - 1;
571         lp->rx_len_bits = (i << 4);
572
573         if (pcnet32_alloc_ring(dev, dev->name)) {
574                 pcnet32_free_ring(dev);
575                 spin_unlock_irqrestore(&lp->lock, flags);
576                 return -ENOMEM;
577         }
578
579         spin_unlock_irqrestore(&lp->lock, flags);
580
581         if (pcnet32_debug & NETIF_MSG_DRV)
582                 printk(KERN_INFO PFX
583                        "%s: Ring Param Settings: RX: %d, TX: %d\n", dev->name,
584                        lp->rx_ring_size, lp->tx_ring_size);
585
586         if (netif_running(dev))
587                 pcnet32_open(dev);
588
589         return 0;
590 }
591
592 static void pcnet32_get_strings(struct net_device *dev, u32 stringset,
593                                 u8 * data)
594 {
595         memcpy(data, pcnet32_gstrings_test, sizeof(pcnet32_gstrings_test));
596 }
597
598 static int pcnet32_self_test_count(struct net_device *dev)
599 {
600         return PCNET32_TEST_LEN;
601 }
602
603 static void pcnet32_ethtool_test(struct net_device *dev,
604                                  struct ethtool_test *test, u64 * data)
605 {
606         struct pcnet32_private *lp = dev->priv;
607         int rc;
608
609         if (test->flags == ETH_TEST_FL_OFFLINE) {
610                 rc = pcnet32_loopback_test(dev, data);
611                 if (rc) {
612                         if (netif_msg_hw(lp))
613                                 printk(KERN_DEBUG "%s: Loopback test failed.\n",
614                                        dev->name);
615                         test->flags |= ETH_TEST_FL_FAILED;
616                 } else if (netif_msg_hw(lp))
617                         printk(KERN_DEBUG "%s: Loopback test passed.\n",
618                                dev->name);
619         } else if (netif_msg_hw(lp))
620                 printk(KERN_DEBUG
621                        "%s: No tests to run (specify 'Offline' on ethtool).",
622                        dev->name);
623 }                               /* end pcnet32_ethtool_test */
624
625 static int pcnet32_loopback_test(struct net_device *dev, uint64_t * data1)
626 {
627         struct pcnet32_private *lp = dev->priv;
628         struct pcnet32_access *a = &lp->a;      /* access to registers */
629         ulong ioaddr = dev->base_addr;  /* card base I/O address */
630         struct sk_buff *skb;    /* sk buff */
631         int x, i;               /* counters */
632         int numbuffs = 4;       /* number of TX/RX buffers and descs */
633         u16 status = 0x8300;    /* TX ring status */
634         u16 teststatus;         /* test of ring status */
635         int rc;                 /* return code */
636         int size;               /* size of packets */
637         unsigned char *packet;  /* source packet data */
638         static const int data_len = 60; /* length of source packets */
639         unsigned long flags;
640         unsigned long ticks;
641
642         *data1 = 1;             /* status of test, default to fail */
643         rc = 1;                 /* default to fail */
644
645         if (netif_running(dev))
646                 pcnet32_close(dev);
647
648         spin_lock_irqsave(&lp->lock, flags);
649
650         /* Reset the PCNET32 */
651         lp->a.reset(ioaddr);
652
653         /* switch pcnet32 to 32bit mode */
654         lp->a.write_bcr(ioaddr, 20, 2);
655
656         lp->init_block.mode =
657             le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
658         lp->init_block.filter[0] = 0;
659         lp->init_block.filter[1] = 0;
660
661         /* purge & init rings but don't actually restart */
662         pcnet32_restart(dev, 0x0000);
663
664         lp->a.write_csr(ioaddr, 0, 0x0004);     /* Set STOP bit */
665
666         /* Initialize Transmit buffers. */
667         size = data_len + 15;
668         for (x = 0; x < numbuffs; x++) {
669                 if (!(skb = dev_alloc_skb(size))) {
670                         if (netif_msg_hw(lp))
671                                 printk(KERN_DEBUG
672                                        "%s: Cannot allocate skb at line: %d!\n",
673                                        dev->name, __LINE__);
674                         goto clean_up;
675                 } else {
676                         packet = skb->data;
677                         skb_put(skb, size);     /* create space for data */
678                         lp->tx_skbuff[x] = skb;
679                         lp->tx_ring[x].length = le16_to_cpu(-skb->len);
680                         lp->tx_ring[x].misc = 0;
681
682                         /* put DA and SA into the skb */
683                         for (i = 0; i < 6; i++)
684                                 *packet++ = dev->dev_addr[i];
685                         for (i = 0; i < 6; i++)
686                                 *packet++ = dev->dev_addr[i];
687                         /* type */
688                         *packet++ = 0x08;
689                         *packet++ = 0x06;
690                         /* packet number */
691                         *packet++ = x;
692                         /* fill packet with data */
693                         for (i = 0; i < data_len; i++)
694                                 *packet++ = i;
695
696                         lp->tx_dma_addr[x] =
697                             pci_map_single(lp->pci_dev, skb->data, skb->len,
698                                            PCI_DMA_TODEVICE);
699                         lp->tx_ring[x].base =
700                             (u32) le32_to_cpu(lp->tx_dma_addr[x]);
701                         wmb();  /* Make sure owner changes after all others are visible */
702                         lp->tx_ring[x].status = le16_to_cpu(status);
703                 }
704         }
705
706         x = a->read_bcr(ioaddr, 32);    /* set internal loopback in BSR32 */
707         x = x | 0x0002;
708         a->write_bcr(ioaddr, 32, x);
709
710         lp->a.write_csr(ioaddr, 15, 0x0044);    /* set int loopback in CSR15 */
711
712         teststatus = le16_to_cpu(0x8000);
713         lp->a.write_csr(ioaddr, 0, 0x0002);     /* Set STRT bit */
714
715         /* Check status of descriptors */
716         for (x = 0; x < numbuffs; x++) {
717                 ticks = 0;
718                 rmb();
719                 while ((lp->rx_ring[x].status & teststatus) && (ticks < 200)) {
720                         spin_unlock_irqrestore(&lp->lock, flags);
721                         mdelay(1);
722                         spin_lock_irqsave(&lp->lock, flags);
723                         rmb();
724                         ticks++;
725                 }
726                 if (ticks == 200) {
727                         if (netif_msg_hw(lp))
728                                 printk("%s: Desc %d failed to reset!\n",
729                                        dev->name, x);
730                         break;
731                 }
732         }
733
734         lp->a.write_csr(ioaddr, 0, 0x0004);     /* Set STOP bit */
735         wmb();
736         if (netif_msg_hw(lp) && netif_msg_pktdata(lp)) {
737                 printk(KERN_DEBUG "%s: RX loopback packets:\n", dev->name);
738
739                 for (x = 0; x < numbuffs; x++) {
740                         printk(KERN_DEBUG "%s: Packet %d:\n", dev->name, x);
741                         skb = lp->rx_skbuff[x];
742                         for (i = 0; i < size; i++) {
743                                 printk("%02x ", *(skb->data + i));
744                         }
745                         printk("\n");
746                 }
747         }
748
749         x = 0;
750         rc = 0;
751         while (x < numbuffs && !rc) {
752                 skb = lp->rx_skbuff[x];
753                 packet = lp->tx_skbuff[x]->data;
754                 for (i = 0; i < size; i++) {
755                         if (*(skb->data + i) != packet[i]) {
756                                 if (netif_msg_hw(lp))
757                                         printk(KERN_DEBUG
758                                                "%s: Error in compare! %2x - %02x %02x\n",
759                                                dev->name, i, *(skb->data + i),
760                                                packet[i]);
761                                 rc = 1;
762                                 break;
763                         }
764                 }
765                 x++;
766         }
767         if (!rc) {
768                 *data1 = 0;
769         }
770
771       clean_up:
772         pcnet32_purge_tx_ring(dev);
773         x = a->read_csr(ioaddr, 15) & 0xFFFF;
774         a->write_csr(ioaddr, 15, (x & ~0x0044));        /* reset bits 6 and 2 */
775
776         x = a->read_bcr(ioaddr, 32);    /* reset internal loopback */
777         x = x & ~0x0002;
778         a->write_bcr(ioaddr, 32, x);
779
780         spin_unlock_irqrestore(&lp->lock, flags);
781
782         if (netif_running(dev)) {
783                 pcnet32_open(dev);
784         } else {
785                 lp->a.write_bcr(ioaddr, 20, 4); /* return to 16bit mode */
786         }
787
788         return (rc);
789 }                               /* end pcnet32_loopback_test  */
790
791 static void pcnet32_led_blink_callback(struct net_device *dev)
792 {
793         struct pcnet32_private *lp = dev->priv;
794         struct pcnet32_access *a = &lp->a;
795         ulong ioaddr = dev->base_addr;
796         unsigned long flags;
797         int i;
798
799         spin_lock_irqsave(&lp->lock, flags);
800         for (i = 4; i < 8; i++) {
801                 a->write_bcr(ioaddr, i, a->read_bcr(ioaddr, i) ^ 0x4000);
802         }
803         spin_unlock_irqrestore(&lp->lock, flags);
804
805         mod_timer(&lp->blink_timer, PCNET32_BLINK_TIMEOUT);
806 }
807
808 static int pcnet32_phys_id(struct net_device *dev, u32 data)
809 {
810         struct pcnet32_private *lp = dev->priv;
811         struct pcnet32_access *a = &lp->a;
812         ulong ioaddr = dev->base_addr;
813         unsigned long flags;
814         int i, regs[4];
815
816         if (!lp->blink_timer.function) {
817                 init_timer(&lp->blink_timer);
818                 lp->blink_timer.function = (void *)pcnet32_led_blink_callback;
819                 lp->blink_timer.data = (unsigned long)dev;
820         }
821
822         /* Save the current value of the bcrs */
823         spin_lock_irqsave(&lp->lock, flags);
824         for (i = 4; i < 8; i++) {
825                 regs[i - 4] = a->read_bcr(ioaddr, i);
826         }
827         spin_unlock_irqrestore(&lp->lock, flags);
828
829         mod_timer(&lp->blink_timer, jiffies);
830         set_current_state(TASK_INTERRUPTIBLE);
831
832         if ((!data) || (data > (u32) (MAX_SCHEDULE_TIMEOUT / HZ)))
833                 data = (u32) (MAX_SCHEDULE_TIMEOUT / HZ);
834
835         msleep_interruptible(data * 1000);
836         del_timer_sync(&lp->blink_timer);
837
838         /* Restore the original value of the bcrs */
839         spin_lock_irqsave(&lp->lock, flags);
840         for (i = 4; i < 8; i++) {
841                 a->write_bcr(ioaddr, i, regs[i - 4]);
842         }
843         spin_unlock_irqrestore(&lp->lock, flags);
844
845         return 0;
846 }
847
848 #define PCNET32_REGS_PER_PHY    32
849 #define PCNET32_MAX_PHYS        32
850 static int pcnet32_get_regs_len(struct net_device *dev)
851 {
852         struct pcnet32_private *lp = dev->priv;
853         int j = lp->phycount * PCNET32_REGS_PER_PHY;
854
855         return ((PCNET32_NUM_REGS + j) * sizeof(u16));
856 }
857
858 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
859                              void *ptr)
860 {
861         int i, csr0;
862         u16 *buff = ptr;
863         struct pcnet32_private *lp = dev->priv;
864         struct pcnet32_access *a = &lp->a;
865         ulong ioaddr = dev->base_addr;
866         int ticks;
867         unsigned long flags;
868
869         spin_lock_irqsave(&lp->lock, flags);
870
871         csr0 = a->read_csr(ioaddr, 0);
872         if (!(csr0 & 0x0004)) { /* If not stopped */
873                 /* set SUSPEND (SPND) - CSR5 bit 0 */
874                 a->write_csr(ioaddr, 5, 0x0001);
875
876                 /* poll waiting for bit to be set */
877                 ticks = 0;
878                 while (!(a->read_csr(ioaddr, 5) & 0x0001)) {
879                         spin_unlock_irqrestore(&lp->lock, flags);
880                         mdelay(1);
881                         spin_lock_irqsave(&lp->lock, flags);
882                         ticks++;
883                         if (ticks > 200) {
884                                 if (netif_msg_hw(lp))
885                                         printk(KERN_DEBUG
886                                                "%s: Error getting into suspend!\n",
887                                                dev->name);
888                                 break;
889                         }
890                 }
891         }
892
893         /* read address PROM */
894         for (i = 0; i < 16; i += 2)
895                 *buff++ = inw(ioaddr + i);
896
897         /* read control and status registers */
898         for (i = 0; i < 90; i++) {
899                 *buff++ = a->read_csr(ioaddr, i);
900         }
901
902         *buff++ = a->read_csr(ioaddr, 112);
903         *buff++ = a->read_csr(ioaddr, 114);
904
905         /* read bus configuration registers */
906         for (i = 0; i < 30; i++) {
907                 *buff++ = a->read_bcr(ioaddr, i);
908         }
909         *buff++ = 0;            /* skip bcr30 so as not to hang 79C976 */
910         for (i = 31; i < 36; i++) {
911                 *buff++ = a->read_bcr(ioaddr, i);
912         }
913
914         /* read mii phy registers */
915         if (lp->mii) {
916                 int j;
917                 for (j = 0; j < PCNET32_MAX_PHYS; j++) {
918                         if (lp->phymask & (1 << j)) {
919                                 for (i = 0; i < PCNET32_REGS_PER_PHY; i++) {
920                                         lp->a.write_bcr(ioaddr, 33,
921                                                         (j << 5) | i);
922                                         *buff++ = lp->a.read_bcr(ioaddr, 34);
923                                 }
924                         }
925                 }
926         }
927
928         if (!(csr0 & 0x0004)) { /* If not stopped */
929                 /* clear SUSPEND (SPND) - CSR5 bit 0 */
930                 a->write_csr(ioaddr, 5, 0x0000);
931         }
932
933         spin_unlock_irqrestore(&lp->lock, flags);
934 }
935
936 static struct ethtool_ops pcnet32_ethtool_ops = {
937         .get_settings           = pcnet32_get_settings,
938         .set_settings           = pcnet32_set_settings,
939         .get_drvinfo            = pcnet32_get_drvinfo,
940         .get_msglevel           = pcnet32_get_msglevel,
941         .set_msglevel           = pcnet32_set_msglevel,
942         .nway_reset             = pcnet32_nway_reset,
943         .get_link               = pcnet32_get_link,
944         .get_ringparam          = pcnet32_get_ringparam,
945         .set_ringparam          = pcnet32_set_ringparam,
946         .get_tx_csum            = ethtool_op_get_tx_csum,
947         .get_sg                 = ethtool_op_get_sg,
948         .get_tso                = ethtool_op_get_tso,
949         .get_strings            = pcnet32_get_strings,
950         .self_test_count        = pcnet32_self_test_count,
951         .self_test              = pcnet32_ethtool_test,
952         .phys_id                = pcnet32_phys_id,
953         .get_regs_len           = pcnet32_get_regs_len,
954         .get_regs               = pcnet32_get_regs,
955         .get_perm_addr          = ethtool_op_get_perm_addr,
956 };
957
958 /* only probes for non-PCI devices, the rest are handled by
959  * pci_register_driver via pcnet32_probe_pci */
960
961 static void __devinit pcnet32_probe_vlbus(void)
962 {
963         unsigned int *port, ioaddr;
964
965         /* search for PCnet32 VLB cards at known addresses */
966         for (port = pcnet32_portlist; (ioaddr = *port); port++) {
967                 if (request_region
968                     (ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_vlbus")) {
969                         /* check if there is really a pcnet chip on that ioaddr */
970                         if ((inb(ioaddr + 14) == 0x57)
971                             && (inb(ioaddr + 15) == 0x57)) {
972                                 pcnet32_probe1(ioaddr, 0, NULL);
973                         } else {
974                                 release_region(ioaddr, PCNET32_TOTAL_SIZE);
975                         }
976                 }
977         }
978 }
979
980 static int __devinit
981 pcnet32_probe_pci(struct pci_dev *pdev, const struct pci_device_id *ent)
982 {
983         unsigned long ioaddr;
984         int err;
985
986         err = pci_enable_device(pdev);
987         if (err < 0) {
988                 if (pcnet32_debug & NETIF_MSG_PROBE)
989                         printk(KERN_ERR PFX
990                                "failed to enable device -- err=%d\n", err);
991                 return err;
992         }
993         pci_set_master(pdev);
994
995         ioaddr = pci_resource_start(pdev, 0);
996         if (!ioaddr) {
997                 if (pcnet32_debug & NETIF_MSG_PROBE)
998                         printk(KERN_ERR PFX
999                                "card has no PCI IO resources, aborting\n");
1000                 return -ENODEV;
1001         }
1002
1003         if (!pci_dma_supported(pdev, PCNET32_DMA_MASK)) {
1004                 if (pcnet32_debug & NETIF_MSG_PROBE)
1005                         printk(KERN_ERR PFX
1006                                "architecture does not support 32bit PCI busmaster DMA\n");
1007                 return -ENODEV;
1008         }
1009         if (request_region(ioaddr, PCNET32_TOTAL_SIZE, "pcnet32_probe_pci") ==
1010             NULL) {
1011                 if (pcnet32_debug & NETIF_MSG_PROBE)
1012                         printk(KERN_ERR PFX
1013                                "io address range already allocated\n");
1014                 return -EBUSY;
1015         }
1016
1017         err = pcnet32_probe1(ioaddr, 1, pdev);
1018         if (err < 0) {
1019                 pci_disable_device(pdev);
1020         }
1021         return err;
1022 }
1023
1024 /* pcnet32_probe1
1025  *  Called from both pcnet32_probe_vlbus and pcnet_probe_pci.
1026  *  pdev will be NULL when called from pcnet32_probe_vlbus.
1027  */
1028 static int __devinit
1029 pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
1030 {
1031         struct pcnet32_private *lp;
1032         dma_addr_t lp_dma_addr;
1033         int i, media;
1034         int fdx, mii, fset, dxsuflo;
1035         int chip_version;
1036         char *chipname;
1037         struct net_device *dev;
1038         struct pcnet32_access *a = NULL;
1039         u8 promaddr[6];
1040         int ret = -ENODEV;
1041
1042         /* reset the chip */
1043         pcnet32_wio_reset(ioaddr);
1044
1045         /* NOTE: 16-bit check is first, otherwise some older PCnet chips fail */
1046         if (pcnet32_wio_read_csr(ioaddr, 0) == 4 && pcnet32_wio_check(ioaddr)) {
1047                 a = &pcnet32_wio;
1048         } else {
1049                 pcnet32_dwio_reset(ioaddr);
1050                 if (pcnet32_dwio_read_csr(ioaddr, 0) == 4
1051                     && pcnet32_dwio_check(ioaddr)) {
1052                         a = &pcnet32_dwio;
1053                 } else
1054                         goto err_release_region;
1055         }
1056
1057         chip_version =
1058             a->read_csr(ioaddr, 88) | (a->read_csr(ioaddr, 89) << 16);
1059         if ((pcnet32_debug & NETIF_MSG_PROBE) && (pcnet32_debug & NETIF_MSG_HW))
1060                 printk(KERN_INFO "  PCnet chip version is %#x.\n",
1061                        chip_version);
1062         if ((chip_version & 0xfff) != 0x003) {
1063                 if (pcnet32_debug & NETIF_MSG_PROBE)
1064                         printk(KERN_INFO PFX "Unsupported chip version.\n");
1065                 goto err_release_region;
1066         }
1067
1068         /* initialize variables */
1069         fdx = mii = fset = dxsuflo = 0;
1070         chip_version = (chip_version >> 12) & 0xffff;
1071
1072         switch (chip_version) {
1073         case 0x2420:
1074                 chipname = "PCnet/PCI 79C970";  /* PCI */
1075                 break;
1076         case 0x2430:
1077                 if (shared)
1078                         chipname = "PCnet/PCI 79C970";  /* 970 gives the wrong chip id back */
1079                 else
1080                         chipname = "PCnet/32 79C965";   /* 486/VL bus */
1081                 break;
1082         case 0x2621:
1083                 chipname = "PCnet/PCI II 79C970A";      /* PCI */
1084                 fdx = 1;
1085                 break;
1086         case 0x2623:
1087                 chipname = "PCnet/FAST 79C971"; /* PCI */
1088                 fdx = 1;
1089                 mii = 1;
1090                 fset = 1;
1091                 break;
1092         case 0x2624:
1093                 chipname = "PCnet/FAST+ 79C972";        /* PCI */
1094                 fdx = 1;
1095                 mii = 1;
1096                 fset = 1;
1097                 break;
1098         case 0x2625:
1099                 chipname = "PCnet/FAST III 79C973";     /* PCI */
1100                 fdx = 1;
1101                 mii = 1;
1102                 break;
1103         case 0x2626:
1104                 chipname = "PCnet/Home 79C978"; /* PCI */
1105                 fdx = 1;
1106                 /*
1107                  * This is based on specs published at www.amd.com.  This section
1108                  * assumes that a card with a 79C978 wants to go into standard
1109                  * ethernet mode.  The 79C978 can also go into 1Mb HomePNA mode,
1110                  * and the module option homepna=1 can select this instead.
1111                  */
1112                 media = a->read_bcr(ioaddr, 49);
1113                 media &= ~3;    /* default to 10Mb ethernet */
1114                 if (cards_found < MAX_UNITS && homepna[cards_found])
1115                         media |= 1;     /* switch to home wiring mode */
1116                 if (pcnet32_debug & NETIF_MSG_PROBE)
1117                         printk(KERN_DEBUG PFX "media set to %sMbit mode.\n",
1118                                (media & 1) ? "1" : "10");
1119                 a->write_bcr(ioaddr, 49, media);
1120                 break;
1121         case 0x2627:
1122                 chipname = "PCnet/FAST III 79C975";     /* PCI */
1123                 fdx = 1;
1124                 mii = 1;
1125                 break;
1126         case 0x2628:
1127                 chipname = "PCnet/PRO 79C976";
1128                 fdx = 1;
1129                 mii = 1;
1130                 break;
1131         default:
1132                 if (pcnet32_debug & NETIF_MSG_PROBE)
1133                         printk(KERN_INFO PFX
1134                                "PCnet version %#x, no PCnet32 chip.\n",
1135                                chip_version);
1136                 goto err_release_region;
1137         }
1138
1139         /*
1140          *  On selected chips turn on the BCR18:NOUFLO bit. This stops transmit
1141          *  starting until the packet is loaded. Strike one for reliability, lose
1142          *  one for latency - although on PCI this isnt a big loss. Older chips
1143          *  have FIFO's smaller than a packet, so you can't do this.
1144          *  Turn on BCR18:BurstRdEn and BCR18:BurstWrEn.
1145          */
1146
1147         if (fset) {
1148                 a->write_bcr(ioaddr, 18, (a->read_bcr(ioaddr, 18) | 0x0860));
1149                 a->write_csr(ioaddr, 80,
1150                              (a->read_csr(ioaddr, 80) & 0x0C00) | 0x0c00);
1151                 dxsuflo = 1;
1152         }
1153
1154         dev = alloc_etherdev(0);
1155         if (!dev) {
1156                 if (pcnet32_debug & NETIF_MSG_PROBE)
1157                         printk(KERN_ERR PFX "Memory allocation failed.\n");
1158                 ret = -ENOMEM;
1159                 goto err_release_region;
1160         }
1161         SET_NETDEV_DEV(dev, &pdev->dev);
1162
1163         if (pcnet32_debug & NETIF_MSG_PROBE)
1164                 printk(KERN_INFO PFX "%s at %#3lx,", chipname, ioaddr);
1165
1166         /* In most chips, after a chip reset, the ethernet address is read from the
1167          * station address PROM at the base address and programmed into the
1168          * "Physical Address Registers" CSR12-14.
1169          * As a precautionary measure, we read the PROM values and complain if
1170          * they disagree with the CSRs.  If they miscompare, and the PROM addr
1171          * is valid, then the PROM addr is used.
1172          */
1173         for (i = 0; i < 3; i++) {
1174                 unsigned int val;
1175                 val = a->read_csr(ioaddr, i + 12) & 0x0ffff;
1176                 /* There may be endianness issues here. */
1177                 dev->dev_addr[2 * i] = val & 0x0ff;
1178                 dev->dev_addr[2 * i + 1] = (val >> 8) & 0x0ff;
1179         }
1180
1181         /* read PROM address and compare with CSR address */
1182         for (i = 0; i < 6; i++)
1183                 promaddr[i] = inb(ioaddr + i);
1184
1185         if (memcmp(promaddr, dev->dev_addr, 6)
1186             || !is_valid_ether_addr(dev->dev_addr)) {
1187                 if (is_valid_ether_addr(promaddr)) {
1188                         if (pcnet32_debug & NETIF_MSG_PROBE) {
1189                                 printk(" warning: CSR address invalid,\n");
1190                                 printk(KERN_INFO
1191                                        "    using instead PROM address of");
1192                         }
1193                         memcpy(dev->dev_addr, promaddr, 6);
1194                 }
1195         }
1196         memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
1197
1198         /* if the ethernet address is not valid, force to 00:00:00:00:00:00 */
1199         if (!is_valid_ether_addr(dev->perm_addr))
1200                 memset(dev->dev_addr, 0, sizeof(dev->dev_addr));
1201
1202         if (pcnet32_debug & NETIF_MSG_PROBE) {
1203                 for (i = 0; i < 6; i++)
1204                         printk(" %2.2x", dev->dev_addr[i]);
1205
1206                 /* Version 0x2623 and 0x2624 */
1207                 if (((chip_version + 1) & 0xfffe) == 0x2624) {
1208                         i = a->read_csr(ioaddr, 80) & 0x0C00;   /* Check tx_start_pt */
1209                         printk("\n" KERN_INFO "    tx_start_pt(0x%04x):", i);
1210                         switch (i >> 10) {
1211                         case 0:
1212                                 printk("  20 bytes,");
1213                                 break;
1214                         case 1:
1215                                 printk("  64 bytes,");
1216                                 break;
1217                         case 2:
1218                                 printk(" 128 bytes,");
1219                                 break;
1220                         case 3:
1221                                 printk("~220 bytes,");
1222                                 break;
1223                         }
1224                         i = a->read_bcr(ioaddr, 18);    /* Check Burst/Bus control */
1225                         printk(" BCR18(%x):", i & 0xffff);
1226                         if (i & (1 << 5))
1227                                 printk("BurstWrEn ");
1228                         if (i & (1 << 6))
1229                                 printk("BurstRdEn ");
1230                         if (i & (1 << 7))
1231                                 printk("DWordIO ");
1232                         if (i & (1 << 11))
1233                                 printk("NoUFlow ");
1234                         i = a->read_bcr(ioaddr, 25);
1235                         printk("\n" KERN_INFO "    SRAMSIZE=0x%04x,", i << 8);
1236                         i = a->read_bcr(ioaddr, 26);
1237                         printk(" SRAM_BND=0x%04x,", i << 8);
1238                         i = a->read_bcr(ioaddr, 27);
1239                         if (i & (1 << 14))
1240                                 printk("LowLatRx");
1241                 }
1242         }
1243
1244         dev->base_addr = ioaddr;
1245         /* pci_alloc_consistent returns page-aligned memory, so we do not have to check the alignment */
1246         if ((lp =
1247              pci_alloc_consistent(pdev, sizeof(*lp), &lp_dma_addr)) == NULL) {
1248                 if (pcnet32_debug & NETIF_MSG_PROBE)
1249                         printk(KERN_ERR PFX
1250                                "Consistent memory allocation failed.\n");
1251                 ret = -ENOMEM;
1252                 goto err_free_netdev;
1253         }
1254
1255         memset(lp, 0, sizeof(*lp));
1256         lp->dma_addr = lp_dma_addr;
1257         lp->pci_dev = pdev;
1258
1259         spin_lock_init(&lp->lock);
1260
1261         SET_MODULE_OWNER(dev);
1262         SET_NETDEV_DEV(dev, &pdev->dev);
1263         dev->priv = lp;
1264         lp->name = chipname;
1265         lp->shared_irq = shared;
1266         lp->tx_ring_size = TX_RING_SIZE;        /* default tx ring size */
1267         lp->rx_ring_size = RX_RING_SIZE;        /* default rx ring size */
1268         lp->tx_mod_mask = lp->tx_ring_size - 1;
1269         lp->rx_mod_mask = lp->rx_ring_size - 1;
1270         lp->tx_len_bits = (PCNET32_LOG_TX_BUFFERS << 12);
1271         lp->rx_len_bits = (PCNET32_LOG_RX_BUFFERS << 4);
1272         lp->mii_if.full_duplex = fdx;
1273         lp->mii_if.phy_id_mask = 0x1f;
1274         lp->mii_if.reg_num_mask = 0x1f;
1275         lp->dxsuflo = dxsuflo;
1276         lp->mii = mii;
1277         lp->msg_enable = pcnet32_debug;
1278         if ((cards_found >= MAX_UNITS)
1279             || (options[cards_found] > sizeof(options_mapping)))
1280                 lp->options = PCNET32_PORT_ASEL;
1281         else
1282                 lp->options = options_mapping[options[cards_found]];
1283         lp->mii_if.dev = dev;
1284         lp->mii_if.mdio_read = mdio_read;
1285         lp->mii_if.mdio_write = mdio_write;
1286
1287         if (fdx && !(lp->options & PCNET32_PORT_ASEL) &&
1288             ((cards_found >= MAX_UNITS) || full_duplex[cards_found]))
1289                 lp->options |= PCNET32_PORT_FD;
1290
1291         if (!a) {
1292                 if (pcnet32_debug & NETIF_MSG_PROBE)
1293                         printk(KERN_ERR PFX "No access methods\n");
1294                 ret = -ENODEV;
1295                 goto err_free_consistent;
1296         }
1297         lp->a = *a;
1298
1299         /* prior to register_netdev, dev->name is not yet correct */
1300         if (pcnet32_alloc_ring(dev, pci_name(lp->pci_dev))) {
1301                 ret = -ENOMEM;
1302                 goto err_free_ring;
1303         }
1304         /* detect special T1/E1 WAN card by checking for MAC address */
1305         if (dev->dev_addr[0] == 0x00 && dev->dev_addr[1] == 0xe0
1306             && dev->dev_addr[2] == 0x75)
1307                 lp->options = PCNET32_PORT_FD | PCNET32_PORT_GPSI;
1308
1309         lp->init_block.mode = le16_to_cpu(0x0003);      /* Disable Rx and Tx. */
1310         lp->init_block.tlen_rlen =
1311             le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
1312         for (i = 0; i < 6; i++)
1313                 lp->init_block.phys_addr[i] = dev->dev_addr[i];
1314         lp->init_block.filter[0] = 0x00000000;
1315         lp->init_block.filter[1] = 0x00000000;
1316         lp->init_block.rx_ring = (u32) le32_to_cpu(lp->rx_ring_dma_addr);
1317         lp->init_block.tx_ring = (u32) le32_to_cpu(lp->tx_ring_dma_addr);
1318
1319         /* switch pcnet32 to 32bit mode */
1320         a->write_bcr(ioaddr, 20, 2);
1321
1322         a->write_csr(ioaddr, 1, (lp->dma_addr + offsetof(struct pcnet32_private,
1323                                                          init_block)) & 0xffff);
1324         a->write_csr(ioaddr, 2, (lp->dma_addr + offsetof(struct pcnet32_private,
1325                                                          init_block)) >> 16);
1326
1327         if (pdev) {             /* use the IRQ provided by PCI */
1328                 dev->irq = pdev->irq;
1329                 if (pcnet32_debug & NETIF_MSG_PROBE)
1330                         printk(" assigned IRQ %d.\n", dev->irq);
1331         } else {
1332                 unsigned long irq_mask = probe_irq_on();
1333
1334                 /*
1335                  * To auto-IRQ we enable the initialization-done and DMA error
1336                  * interrupts. For ISA boards we get a DMA error, but VLB and PCI
1337                  * boards will work.
1338                  */
1339                 /* Trigger an initialization just for the interrupt. */
1340                 a->write_csr(ioaddr, 0, 0x41);
1341                 mdelay(1);
1342
1343                 dev->irq = probe_irq_off(irq_mask);
1344                 if (!dev->irq) {
1345                         if (pcnet32_debug & NETIF_MSG_PROBE)
1346                                 printk(", failed to detect IRQ line.\n");
1347                         ret = -ENODEV;
1348                         goto err_free_ring;
1349                 }
1350                 if (pcnet32_debug & NETIF_MSG_PROBE)
1351                         printk(", probed IRQ %d.\n", dev->irq);
1352         }
1353
1354         /* Set the mii phy_id so that we can query the link state */
1355         if (lp->mii) {
1356                 /* lp->phycount and lp->phymask are set to 0 by memset above */
1357
1358                 lp->mii_if.phy_id = ((lp->a.read_bcr(ioaddr, 33)) >> 5) & 0x1f;
1359                 /* scan for PHYs */
1360                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1361                         unsigned short id1, id2;
1362
1363                         id1 = mdio_read(dev, i, MII_PHYSID1);
1364                         if (id1 == 0xffff)
1365                                 continue;
1366                         id2 = mdio_read(dev, i, MII_PHYSID2);
1367                         if (id2 == 0xffff)
1368                                 continue;
1369                         if (i == 31 && ((chip_version + 1) & 0xfffe) == 0x2624)
1370                                 continue;       /* 79C971 & 79C972 have phantom phy at id 31 */
1371                         lp->phycount++;
1372                         lp->phymask |= (1 << i);
1373                         lp->mii_if.phy_id = i;
1374                         if (pcnet32_debug & NETIF_MSG_PROBE)
1375                                 printk(KERN_INFO PFX
1376                                        "Found PHY %04x:%04x at address %d.\n",
1377                                        id1, id2, i);
1378                 }
1379                 lp->a.write_bcr(ioaddr, 33, (lp->mii_if.phy_id) << 5);
1380                 if (lp->phycount > 1) {
1381                         lp->options |= PCNET32_PORT_MII;
1382                 }
1383         }
1384
1385         init_timer(&lp->watchdog_timer);
1386         lp->watchdog_timer.data = (unsigned long)dev;
1387         lp->watchdog_timer.function = (void *)&pcnet32_watchdog;
1388
1389         /* The PCNET32-specific entries in the device structure. */
1390         dev->open = &pcnet32_open;
1391         dev->hard_start_xmit = &pcnet32_start_xmit;
1392         dev->stop = &pcnet32_close;
1393         dev->get_stats = &pcnet32_get_stats;
1394         dev->set_multicast_list = &pcnet32_set_multicast_list;
1395         dev->do_ioctl = &pcnet32_ioctl;
1396         dev->ethtool_ops = &pcnet32_ethtool_ops;
1397         dev->tx_timeout = pcnet32_tx_timeout;
1398         dev->watchdog_timeo = (5 * HZ);
1399
1400 #ifdef CONFIG_NET_POLL_CONTROLLER
1401         dev->poll_controller = pcnet32_poll_controller;
1402 #endif
1403
1404         /* Fill in the generic fields of the device structure. */
1405         if (register_netdev(dev))
1406                 goto err_free_ring;
1407
1408         if (pdev) {
1409                 pci_set_drvdata(pdev, dev);
1410         } else {
1411                 lp->next = pcnet32_dev;
1412                 pcnet32_dev = dev;
1413         }
1414
1415         if (pcnet32_debug & NETIF_MSG_PROBE)
1416                 printk(KERN_INFO "%s: registered as %s\n", dev->name, lp->name);
1417         cards_found++;
1418
1419         /* enable LED writes */
1420         a->write_bcr(ioaddr, 2, a->read_bcr(ioaddr, 2) | 0x1000);
1421
1422         return 0;
1423
1424       err_free_ring:
1425         pcnet32_free_ring(dev);
1426       err_free_consistent:
1427         pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
1428       err_free_netdev:
1429         free_netdev(dev);
1430       err_release_region:
1431         release_region(ioaddr, PCNET32_TOTAL_SIZE);
1432         return ret;
1433 }
1434
1435 /* if any allocation fails, caller must also call pcnet32_free_ring */
1436 static int pcnet32_alloc_ring(struct net_device *dev, char *name)
1437 {
1438         struct pcnet32_private *lp = dev->priv;
1439
1440         lp->tx_ring = pci_alloc_consistent(lp->pci_dev,
1441                                            sizeof(struct pcnet32_tx_head) *
1442                                            lp->tx_ring_size,
1443                                            &lp->tx_ring_dma_addr);
1444         if (lp->tx_ring == NULL) {
1445                 if (pcnet32_debug & NETIF_MSG_DRV)
1446                         printk("\n" KERN_ERR PFX
1447                                "%s: Consistent memory allocation failed.\n",
1448                                name);
1449                 return -ENOMEM;
1450         }
1451
1452         lp->rx_ring = pci_alloc_consistent(lp->pci_dev,
1453                                            sizeof(struct pcnet32_rx_head) *
1454                                            lp->rx_ring_size,
1455                                            &lp->rx_ring_dma_addr);
1456         if (lp->rx_ring == NULL) {
1457                 if (pcnet32_debug & NETIF_MSG_DRV)
1458                         printk("\n" KERN_ERR PFX
1459                                "%s: Consistent memory allocation failed.\n",
1460                                name);
1461                 return -ENOMEM;
1462         }
1463
1464         lp->tx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->tx_ring_size,
1465                                   GFP_ATOMIC);
1466         if (!lp->tx_dma_addr) {
1467                 if (pcnet32_debug & NETIF_MSG_DRV)
1468                         printk("\n" KERN_ERR PFX
1469                                "%s: Memory allocation failed.\n", name);
1470                 return -ENOMEM;
1471         }
1472         memset(lp->tx_dma_addr, 0, sizeof(dma_addr_t) * lp->tx_ring_size);
1473
1474         lp->rx_dma_addr = kmalloc(sizeof(dma_addr_t) * lp->rx_ring_size,
1475                                   GFP_ATOMIC);
1476         if (!lp->rx_dma_addr) {
1477                 if (pcnet32_debug & NETIF_MSG_DRV)
1478                         printk("\n" KERN_ERR PFX
1479                                "%s: Memory allocation failed.\n", name);
1480                 return -ENOMEM;
1481         }
1482         memset(lp->rx_dma_addr, 0, sizeof(dma_addr_t) * lp->rx_ring_size);
1483
1484         lp->tx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->tx_ring_size,
1485                                 GFP_ATOMIC);
1486         if (!lp->tx_skbuff) {
1487                 if (pcnet32_debug & NETIF_MSG_DRV)
1488                         printk("\n" KERN_ERR PFX
1489                                "%s: Memory allocation failed.\n", name);
1490                 return -ENOMEM;
1491         }
1492         memset(lp->tx_skbuff, 0, sizeof(struct sk_buff *) * lp->tx_ring_size);
1493
1494         lp->rx_skbuff = kmalloc(sizeof(struct sk_buff *) * lp->rx_ring_size,
1495                                 GFP_ATOMIC);
1496         if (!lp->rx_skbuff) {
1497                 if (pcnet32_debug & NETIF_MSG_DRV)
1498                         printk("\n" KERN_ERR PFX
1499                                "%s: Memory allocation failed.\n", name);
1500                 return -ENOMEM;
1501         }
1502         memset(lp->rx_skbuff, 0, sizeof(struct sk_buff *) * lp->rx_ring_size);
1503
1504         return 0;
1505 }
1506
1507 static void pcnet32_free_ring(struct net_device *dev)
1508 {
1509         struct pcnet32_private *lp = dev->priv;
1510
1511         kfree(lp->tx_skbuff);
1512         lp->tx_skbuff = NULL;
1513
1514         kfree(lp->rx_skbuff);
1515         lp->rx_skbuff = NULL;
1516
1517         kfree(lp->tx_dma_addr);
1518         lp->tx_dma_addr = NULL;
1519
1520         kfree(lp->rx_dma_addr);
1521         lp->rx_dma_addr = NULL;
1522
1523         if (lp->tx_ring) {
1524                 pci_free_consistent(lp->pci_dev,
1525                                     sizeof(struct pcnet32_tx_head) *
1526                                     lp->tx_ring_size, lp->tx_ring,
1527                                     lp->tx_ring_dma_addr);
1528                 lp->tx_ring = NULL;
1529         }
1530
1531         if (lp->rx_ring) {
1532                 pci_free_consistent(lp->pci_dev,
1533                                     sizeof(struct pcnet32_rx_head) *
1534                                     lp->rx_ring_size, lp->rx_ring,
1535                                     lp->rx_ring_dma_addr);
1536                 lp->rx_ring = NULL;
1537         }
1538 }
1539
1540 static int pcnet32_open(struct net_device *dev)
1541 {
1542         struct pcnet32_private *lp = dev->priv;
1543         unsigned long ioaddr = dev->base_addr;
1544         u16 val;
1545         int i;
1546         int rc;
1547         unsigned long flags;
1548
1549         if (request_irq(dev->irq, &pcnet32_interrupt,
1550                         lp->shared_irq ? SA_SHIRQ : 0, dev->name,
1551                         (void *)dev)) {
1552                 return -EAGAIN;
1553         }
1554
1555         spin_lock_irqsave(&lp->lock, flags);
1556         /* Check for a valid station address */
1557         if (!is_valid_ether_addr(dev->dev_addr)) {
1558                 rc = -EINVAL;
1559                 goto err_free_irq;
1560         }
1561
1562         /* Reset the PCNET32 */
1563         lp->a.reset(ioaddr);
1564
1565         /* switch pcnet32 to 32bit mode */
1566         lp->a.write_bcr(ioaddr, 20, 2);
1567
1568         if (netif_msg_ifup(lp))
1569                 printk(KERN_DEBUG
1570                        "%s: pcnet32_open() irq %d tx/rx rings %#x/%#x init %#x.\n",
1571                        dev->name, dev->irq, (u32) (lp->tx_ring_dma_addr),
1572                        (u32) (lp->rx_ring_dma_addr),
1573                        (u32) (lp->dma_addr +
1574                               offsetof(struct pcnet32_private, init_block)));
1575
1576         /* set/reset autoselect bit */
1577         val = lp->a.read_bcr(ioaddr, 2) & ~2;
1578         if (lp->options & PCNET32_PORT_ASEL)
1579                 val |= 2;
1580         lp->a.write_bcr(ioaddr, 2, val);
1581
1582         /* handle full duplex setting */
1583         if (lp->mii_if.full_duplex) {
1584                 val = lp->a.read_bcr(ioaddr, 9) & ~3;
1585                 if (lp->options & PCNET32_PORT_FD) {
1586                         val |= 1;
1587                         if (lp->options == (PCNET32_PORT_FD | PCNET32_PORT_AUI))
1588                                 val |= 2;
1589                 } else if (lp->options & PCNET32_PORT_ASEL) {
1590                         /* workaround of xSeries250, turn on for 79C975 only */
1591                         i = ((lp->a.read_csr(ioaddr, 88) |
1592                               (lp->a.
1593                                read_csr(ioaddr, 89) << 16)) >> 12) & 0xffff;
1594                         if (i == 0x2627)
1595                                 val |= 3;
1596                 }
1597                 lp->a.write_bcr(ioaddr, 9, val);
1598         }
1599
1600         /* set/reset GPSI bit in test register */
1601         val = lp->a.read_csr(ioaddr, 124) & ~0x10;
1602         if ((lp->options & PCNET32_PORT_PORTSEL) == PCNET32_PORT_GPSI)
1603                 val |= 0x10;
1604         lp->a.write_csr(ioaddr, 124, val);
1605
1606         /* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
1607         if (lp->pci_dev->subsystem_vendor == PCI_VENDOR_ID_AT &&
1608             (lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
1609              lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
1610                 if (lp->options & PCNET32_PORT_ASEL) {
1611                         lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
1612                         if (netif_msg_link(lp))
1613                                 printk(KERN_DEBUG
1614                                        "%s: Setting 100Mb-Full Duplex.\n",
1615                                        dev->name);
1616                 }
1617         }
1618         if (lp->phycount < 2) {
1619                 /*
1620                  * 24 Jun 2004 according AMD, in order to change the PHY,
1621                  * DANAS (or DISPM for 79C976) must be set; then select the speed,
1622                  * duplex, and/or enable auto negotiation, and clear DANAS
1623                  */
1624                 if (lp->mii && !(lp->options & PCNET32_PORT_ASEL)) {
1625                         lp->a.write_bcr(ioaddr, 32,
1626                                         lp->a.read_bcr(ioaddr, 32) | 0x0080);
1627                         /* disable Auto Negotiation, set 10Mpbs, HD */
1628                         val = lp->a.read_bcr(ioaddr, 32) & ~0xb8;
1629                         if (lp->options & PCNET32_PORT_FD)
1630                                 val |= 0x10;
1631                         if (lp->options & PCNET32_PORT_100)
1632                                 val |= 0x08;
1633                         lp->a.write_bcr(ioaddr, 32, val);
1634                 } else {
1635                         if (lp->options & PCNET32_PORT_ASEL) {
1636                                 lp->a.write_bcr(ioaddr, 32,
1637                                                 lp->a.read_bcr(ioaddr,
1638                                                                32) | 0x0080);
1639                                 /* enable auto negotiate, setup, disable fd */
1640                                 val = lp->a.read_bcr(ioaddr, 32) & ~0x98;
1641                                 val |= 0x20;
1642                                 lp->a.write_bcr(ioaddr, 32, val);
1643                         }
1644                 }
1645         } else {
1646                 int first_phy = -1;
1647                 u16 bmcr;
1648                 u32 bcr9;
1649                 struct ethtool_cmd ecmd;
1650
1651                 /*
1652                  * There is really no good other way to handle multiple PHYs
1653                  * other than turning off all automatics
1654                  */
1655                 val = lp->a.read_bcr(ioaddr, 2);
1656                 lp->a.write_bcr(ioaddr, 2, val & ~2);
1657                 val = lp->a.read_bcr(ioaddr, 32);
1658                 lp->a.write_bcr(ioaddr, 32, val & ~(1 << 7));   /* stop MII manager */
1659
1660                 if (!(lp->options & PCNET32_PORT_ASEL)) {
1661                         /* setup ecmd */
1662                         ecmd.port = PORT_MII;
1663                         ecmd.transceiver = XCVR_INTERNAL;
1664                         ecmd.autoneg = AUTONEG_DISABLE;
1665                         ecmd.speed =
1666                             lp->
1667                             options & PCNET32_PORT_100 ? SPEED_100 : SPEED_10;
1668                         bcr9 = lp->a.read_bcr(ioaddr, 9);
1669
1670                         if (lp->options & PCNET32_PORT_FD) {
1671                                 ecmd.duplex = DUPLEX_FULL;
1672                                 bcr9 |= (1 << 0);
1673                         } else {
1674                                 ecmd.duplex = DUPLEX_HALF;
1675                                 bcr9 |= ~(1 << 0);
1676                         }
1677                         lp->a.write_bcr(ioaddr, 9, bcr9);
1678                 }
1679
1680                 for (i = 0; i < PCNET32_MAX_PHYS; i++) {
1681                         if (lp->phymask & (1 << i)) {
1682                                 /* isolate all but the first PHY */
1683                                 bmcr = mdio_read(dev, i, MII_BMCR);
1684                                 if (first_phy == -1) {
1685                                         first_phy = i;
1686                                         mdio_write(dev, i, MII_BMCR,
1687                                                    bmcr & ~BMCR_ISOLATE);
1688                                 } else {
1689                                         mdio_write(dev, i, MII_BMCR,
1690                                                    bmcr | BMCR_ISOLATE);
1691                                 }
1692                                 /* use mii_ethtool_sset to setup PHY */
1693                                 lp->mii_if.phy_id = i;
1694                                 ecmd.phy_address = i;
1695                                 if (lp->options & PCNET32_PORT_ASEL) {
1696                                         mii_ethtool_gset(&lp->mii_if, &ecmd);
1697                                         ecmd.autoneg = AUTONEG_ENABLE;
1698                                 }
1699                                 mii_ethtool_sset(&lp->mii_if, &ecmd);
1700                         }
1701                 }
1702                 lp->mii_if.phy_id = first_phy;
1703                 if (netif_msg_link(lp))
1704                         printk(KERN_INFO "%s: Using PHY number %d.\n",
1705                                dev->name, first_phy);
1706         }
1707
1708 #ifdef DO_DXSUFLO
1709         if (lp->dxsuflo) {      /* Disable transmit stop on underflow */
1710                 val = lp->a.read_csr(ioaddr, 3);
1711                 val |= 0x40;
1712                 lp->a.write_csr(ioaddr, 3, val);
1713         }
1714 #endif
1715
1716         lp->init_block.mode =
1717             le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
1718         pcnet32_load_multicast(dev);
1719
1720         if (pcnet32_init_ring(dev)) {
1721                 rc = -ENOMEM;
1722                 goto err_free_ring;
1723         }
1724
1725         /* Re-initialize the PCNET32, and start it when done. */
1726         lp->a.write_csr(ioaddr, 1, (lp->dma_addr +
1727                                     offsetof(struct pcnet32_private,
1728                                              init_block)) & 0xffff);
1729         lp->a.write_csr(ioaddr, 2,
1730                         (lp->dma_addr +
1731                          offsetof(struct pcnet32_private, init_block)) >> 16);
1732
1733         lp->a.write_csr(ioaddr, 4, 0x0915);
1734         lp->a.write_csr(ioaddr, 0, 0x0001);
1735
1736         netif_start_queue(dev);
1737
1738         /* Print the link status and start the watchdog */
1739         pcnet32_check_media(dev, 1);
1740         mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
1741
1742         i = 0;
1743         while (i++ < 100)
1744                 if (lp->a.read_csr(ioaddr, 0) & 0x0100)
1745                         break;
1746         /*
1747          * We used to clear the InitDone bit, 0x0100, here but Mark Stockton
1748          * reports that doing so triggers a bug in the '974.
1749          */
1750         lp->a.write_csr(ioaddr, 0, 0x0042);
1751
1752         if (netif_msg_ifup(lp))
1753                 printk(KERN_DEBUG
1754                        "%s: pcnet32 open after %d ticks, init block %#x csr0 %4.4x.\n",
1755                        dev->name, i,
1756                        (u32) (lp->dma_addr +
1757                               offsetof(struct pcnet32_private, init_block)),
1758                        lp->a.read_csr(ioaddr, 0));
1759
1760         spin_unlock_irqrestore(&lp->lock, flags);
1761
1762         return 0;               /* Always succeed */
1763
1764       err_free_ring:
1765         /* free any allocated skbuffs */
1766         for (i = 0; i < lp->rx_ring_size; i++) {
1767                 lp->rx_ring[i].status = 0;
1768                 if (lp->rx_skbuff[i]) {
1769                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
1770                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
1771                         dev_kfree_skb(lp->rx_skbuff[i]);
1772                 }
1773                 lp->rx_skbuff[i] = NULL;
1774                 lp->rx_dma_addr[i] = 0;
1775         }
1776
1777         pcnet32_free_ring(dev);
1778
1779         /*
1780          * Switch back to 16bit mode to avoid problems with dumb
1781          * DOS packet driver after a warm reboot
1782          */
1783         lp->a.write_bcr(ioaddr, 20, 4);
1784
1785       err_free_irq:
1786         spin_unlock_irqrestore(&lp->lock, flags);
1787         free_irq(dev->irq, dev);
1788         return rc;
1789 }
1790
1791 /*
1792  * The LANCE has been halted for one reason or another (busmaster memory
1793  * arbitration error, Tx FIFO underflow, driver stopped it to reconfigure,
1794  * etc.).  Modern LANCE variants always reload their ring-buffer
1795  * configuration when restarted, so we must reinitialize our ring
1796  * context before restarting.  As part of this reinitialization,
1797  * find all packets still on the Tx ring and pretend that they had been
1798  * sent (in effect, drop the packets on the floor) - the higher-level
1799  * protocols will time out and retransmit.  It'd be better to shuffle
1800  * these skbs to a temp list and then actually re-Tx them after
1801  * restarting the chip, but I'm too lazy to do so right now.  dplatt@3do.com
1802  */
1803
1804 static void pcnet32_purge_tx_ring(struct net_device *dev)
1805 {
1806         struct pcnet32_private *lp = dev->priv;
1807         int i;
1808
1809         for (i = 0; i < lp->tx_ring_size; i++) {
1810                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
1811                 wmb();          /* Make sure adapter sees owner change */
1812                 if (lp->tx_skbuff[i]) {
1813                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
1814                                          lp->tx_skbuff[i]->len,
1815                                          PCI_DMA_TODEVICE);
1816                         dev_kfree_skb_any(lp->tx_skbuff[i]);
1817                 }
1818                 lp->tx_skbuff[i] = NULL;
1819                 lp->tx_dma_addr[i] = 0;
1820         }
1821 }
1822
1823 /* Initialize the PCNET32 Rx and Tx rings. */
1824 static int pcnet32_init_ring(struct net_device *dev)
1825 {
1826         struct pcnet32_private *lp = dev->priv;
1827         int i;
1828
1829         lp->tx_full = 0;
1830         lp->cur_rx = lp->cur_tx = 0;
1831         lp->dirty_rx = lp->dirty_tx = 0;
1832
1833         for (i = 0; i < lp->rx_ring_size; i++) {
1834                 struct sk_buff *rx_skbuff = lp->rx_skbuff[i];
1835                 if (rx_skbuff == NULL) {
1836                         if (!
1837                             (rx_skbuff = lp->rx_skbuff[i] =
1838                              dev_alloc_skb(PKT_BUF_SZ))) {
1839                                 /* there is not much, we can do at this point */
1840                                 if (pcnet32_debug & NETIF_MSG_DRV)
1841                                         printk(KERN_ERR
1842                                                "%s: pcnet32_init_ring dev_alloc_skb failed.\n",
1843                                                dev->name);
1844                                 return -1;
1845                         }
1846                         skb_reserve(rx_skbuff, 2);
1847                 }
1848
1849                 rmb();
1850                 if (lp->rx_dma_addr[i] == 0)
1851                         lp->rx_dma_addr[i] =
1852                             pci_map_single(lp->pci_dev, rx_skbuff->data,
1853                                            PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
1854                 lp->rx_ring[i].base = (u32) le32_to_cpu(lp->rx_dma_addr[i]);
1855                 lp->rx_ring[i].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);
1856                 wmb();          /* Make sure owner changes after all others are visible */
1857                 lp->rx_ring[i].status = le16_to_cpu(0x8000);
1858         }
1859         /* The Tx buffer address is filled in as needed, but we do need to clear
1860          * the upper ownership bit. */
1861         for (i = 0; i < lp->tx_ring_size; i++) {
1862                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
1863                 wmb();          /* Make sure adapter sees owner change */
1864                 lp->tx_ring[i].base = 0;
1865                 lp->tx_dma_addr[i] = 0;
1866         }
1867
1868         lp->init_block.tlen_rlen =
1869             le16_to_cpu(lp->tx_len_bits | lp->rx_len_bits);
1870         for (i = 0; i < 6; i++)
1871                 lp->init_block.phys_addr[i] = dev->dev_addr[i];
1872         lp->init_block.rx_ring = (u32) le32_to_cpu(lp->rx_ring_dma_addr);
1873         lp->init_block.tx_ring = (u32) le32_to_cpu(lp->tx_ring_dma_addr);
1874         wmb();                  /* Make sure all changes are visible */
1875         return 0;
1876 }
1877
1878 /* the pcnet32 has been issued a stop or reset.  Wait for the stop bit
1879  * then flush the pending transmit operations, re-initialize the ring,
1880  * and tell the chip to initialize.
1881  */
1882 static void pcnet32_restart(struct net_device *dev, unsigned int csr0_bits)
1883 {
1884         struct pcnet32_private *lp = dev->priv;
1885         unsigned long ioaddr = dev->base_addr;
1886         int i;
1887
1888         /* wait for stop */
1889         for (i = 0; i < 100; i++)
1890                 if (lp->a.read_csr(ioaddr, 0) & 0x0004)
1891                         break;
1892
1893         if (i >= 100 && netif_msg_drv(lp))
1894                 printk(KERN_ERR
1895                        "%s: pcnet32_restart timed out waiting for stop.\n",
1896                        dev->name);
1897
1898         pcnet32_purge_tx_ring(dev);
1899         if (pcnet32_init_ring(dev))
1900                 return;
1901
1902         /* ReInit Ring */
1903         lp->a.write_csr(ioaddr, 0, 1);
1904         i = 0;
1905         while (i++ < 1000)
1906                 if (lp->a.read_csr(ioaddr, 0) & 0x0100)
1907                         break;
1908
1909         lp->a.write_csr(ioaddr, 0, csr0_bits);
1910 }
1911
1912 static void pcnet32_tx_timeout(struct net_device *dev)
1913 {
1914         struct pcnet32_private *lp = dev->priv;
1915         unsigned long ioaddr = dev->base_addr, flags;
1916
1917         spin_lock_irqsave(&lp->lock, flags);
1918         /* Transmitter timeout, serious problems. */
1919         if (pcnet32_debug & NETIF_MSG_DRV)
1920                 printk(KERN_ERR
1921                        "%s: transmit timed out, status %4.4x, resetting.\n",
1922                        dev->name, lp->a.read_csr(ioaddr, 0));
1923         lp->a.write_csr(ioaddr, 0, 0x0004);
1924         lp->stats.tx_errors++;
1925         if (netif_msg_tx_err(lp)) {
1926                 int i;
1927                 printk(KERN_DEBUG
1928                        " Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
1929                        lp->dirty_tx, lp->cur_tx, lp->tx_full ? " (full)" : "",
1930                        lp->cur_rx);
1931                 for (i = 0; i < lp->rx_ring_size; i++)
1932                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
1933                                le32_to_cpu(lp->rx_ring[i].base),
1934                                (-le16_to_cpu(lp->rx_ring[i].buf_length)) &
1935                                0xffff, le32_to_cpu(lp->rx_ring[i].msg_length),
1936                                le16_to_cpu(lp->rx_ring[i].status));
1937                 for (i = 0; i < lp->tx_ring_size; i++)
1938                         printk("%s %08x %04x %08x %04x", i & 1 ? "" : "\n ",
1939                                le32_to_cpu(lp->tx_ring[i].base),
1940                                (-le16_to_cpu(lp->tx_ring[i].length)) & 0xffff,
1941                                le32_to_cpu(lp->tx_ring[i].misc),
1942                                le16_to_cpu(lp->tx_ring[i].status));
1943                 printk("\n");
1944         }
1945         pcnet32_restart(dev, 0x0042);
1946
1947         dev->trans_start = jiffies;
1948         netif_wake_queue(dev);
1949
1950         spin_unlock_irqrestore(&lp->lock, flags);
1951 }
1952
1953 static int pcnet32_start_xmit(struct sk_buff *skb, struct net_device *dev)
1954 {
1955         struct pcnet32_private *lp = dev->priv;
1956         unsigned long ioaddr = dev->base_addr;
1957         u16 status;
1958         int entry;
1959         unsigned long flags;
1960
1961         spin_lock_irqsave(&lp->lock, flags);
1962
1963         if (netif_msg_tx_queued(lp)) {
1964                 printk(KERN_DEBUG
1965                        "%s: pcnet32_start_xmit() called, csr0 %4.4x.\n",
1966                        dev->name, lp->a.read_csr(ioaddr, 0));
1967         }
1968
1969         /* Default status -- will not enable Successful-TxDone
1970          * interrupt when that option is available to us.
1971          */
1972         status = 0x8300;
1973
1974         /* Fill in a Tx ring entry */
1975
1976         /* Mask to ring buffer boundary. */
1977         entry = lp->cur_tx & lp->tx_mod_mask;
1978
1979         /* Caution: the write order is important here, set the status
1980          * with the "ownership" bits last. */
1981
1982         lp->tx_ring[entry].length = le16_to_cpu(-skb->len);
1983
1984         lp->tx_ring[entry].misc = 0x00000000;
1985
1986         lp->tx_skbuff[entry] = skb;
1987         lp->tx_dma_addr[entry] =
1988             pci_map_single(lp->pci_dev, skb->data, skb->len, PCI_DMA_TODEVICE);
1989         lp->tx_ring[entry].base = (u32) le32_to_cpu(lp->tx_dma_addr[entry]);
1990         wmb();                  /* Make sure owner changes after all others are visible */
1991         lp->tx_ring[entry].status = le16_to_cpu(status);
1992
1993         lp->cur_tx++;
1994         lp->stats.tx_bytes += skb->len;
1995
1996         /* Trigger an immediate send poll. */
1997         lp->a.write_csr(ioaddr, 0, 0x0048);
1998
1999         dev->trans_start = jiffies;
2000
2001         if (lp->tx_ring[(entry + 1) & lp->tx_mod_mask].base != 0) {
2002                 lp->tx_full = 1;
2003                 netif_stop_queue(dev);
2004         }
2005         spin_unlock_irqrestore(&lp->lock, flags);
2006         return 0;
2007 }
2008
2009 /* The PCNET32 interrupt handler. */
2010 static irqreturn_t
2011 pcnet32_interrupt(int irq, void *dev_id, struct pt_regs *regs)
2012 {
2013         struct net_device *dev = dev_id;
2014         struct pcnet32_private *lp;
2015         unsigned long ioaddr;
2016         u16 csr0, rap;
2017         int boguscnt = max_interrupt_work;
2018         int must_restart;
2019
2020         if (!dev) {
2021                 if (pcnet32_debug & NETIF_MSG_INTR)
2022                         printk(KERN_DEBUG "%s(): irq %d for unknown device\n",
2023                                __FUNCTION__, irq);
2024                 return IRQ_NONE;
2025         }
2026
2027         ioaddr = dev->base_addr;
2028         lp = dev->priv;
2029
2030         spin_lock(&lp->lock);
2031
2032         rap = lp->a.read_rap(ioaddr);
2033         while ((csr0 = lp->a.read_csr(ioaddr, 0)) & 0x8f00 && --boguscnt >= 0) {
2034                 if (csr0 == 0xffff) {
2035                         break;  /* PCMCIA remove happened */
2036                 }
2037                 /* Acknowledge all of the current interrupt sources ASAP. */
2038                 lp->a.write_csr(ioaddr, 0, csr0 & ~0x004f);
2039
2040                 must_restart = 0;
2041
2042                 if (netif_msg_intr(lp))
2043                         printk(KERN_DEBUG
2044                                "%s: interrupt  csr0=%#2.2x new csr=%#2.2x.\n",
2045                                dev->name, csr0, lp->a.read_csr(ioaddr, 0));
2046
2047                 if (csr0 & 0x0400)      /* Rx interrupt */
2048                         pcnet32_rx(dev);
2049
2050                 if (csr0 & 0x0200) {    /* Tx-done interrupt */
2051                         unsigned int dirty_tx = lp->dirty_tx;
2052                         int delta;
2053
2054                         while (dirty_tx != lp->cur_tx) {
2055                                 int entry = dirty_tx & lp->tx_mod_mask;
2056                                 int status =
2057                                     (short)le16_to_cpu(lp->tx_ring[entry].
2058                                                        status);
2059
2060                                 if (status < 0)
2061                                         break;  /* It still hasn't been Txed */
2062
2063                                 lp->tx_ring[entry].base = 0;
2064
2065                                 if (status & 0x4000) {
2066                                         /* There was an major error, log it. */
2067                                         int err_status =
2068                                             le32_to_cpu(lp->tx_ring[entry].
2069                                                         misc);
2070                                         lp->stats.tx_errors++;
2071                                         if (netif_msg_tx_err(lp))
2072                                                 printk(KERN_ERR
2073                                                        "%s: Tx error status=%04x err_status=%08x\n",
2074                                                        dev->name, status,
2075                                                        err_status);
2076                                         if (err_status & 0x04000000)
2077                                                 lp->stats.tx_aborted_errors++;
2078                                         if (err_status & 0x08000000)
2079                                                 lp->stats.tx_carrier_errors++;
2080                                         if (err_status & 0x10000000)
2081                                                 lp->stats.tx_window_errors++;
2082 #ifndef DO_DXSUFLO
2083                                         if (err_status & 0x40000000) {
2084                                                 lp->stats.tx_fifo_errors++;
2085                                                 /* Ackk!  On FIFO errors the Tx unit is turned off! */
2086                                                 /* Remove this verbosity later! */
2087                                                 if (netif_msg_tx_err(lp))
2088                                                         printk(KERN_ERR
2089                                                                "%s: Tx FIFO error! CSR0=%4.4x\n",
2090                                                                dev->name, csr0);
2091                                                 must_restart = 1;
2092                                         }
2093 #else
2094                                         if (err_status & 0x40000000) {
2095                                                 lp->stats.tx_fifo_errors++;
2096                                                 if (!lp->dxsuflo) {     /* If controller doesn't recover ... */
2097                                                         /* Ackk!  On FIFO errors the Tx unit is turned off! */
2098                                                         /* Remove this verbosity later! */
2099                                                         if (netif_msg_tx_err
2100                                                             (lp))
2101                                                                 printk(KERN_ERR
2102                                                                        "%s: Tx FIFO error! CSR0=%4.4x\n",
2103                                                                        dev->
2104                                                                        name,
2105                                                                        csr0);
2106                                                         must_restart = 1;
2107                                                 }
2108                                         }
2109 #endif
2110                                 } else {
2111                                         if (status & 0x1800)
2112                                                 lp->stats.collisions++;
2113                                         lp->stats.tx_packets++;
2114                                 }
2115
2116                                 /* We must free the original skb */
2117                                 if (lp->tx_skbuff[entry]) {
2118                                         pci_unmap_single(lp->pci_dev,
2119                                                          lp->tx_dma_addr[entry],
2120                                                          lp->tx_skbuff[entry]->
2121                                                          len, PCI_DMA_TODEVICE);
2122                                         dev_kfree_skb_irq(lp->tx_skbuff[entry]);
2123                                         lp->tx_skbuff[entry] = NULL;
2124                                         lp->tx_dma_addr[entry] = 0;
2125                                 }
2126                                 dirty_tx++;
2127                         }
2128
2129                         delta =
2130                             (lp->cur_tx - dirty_tx) & (lp->tx_mod_mask +
2131                                                        lp->tx_ring_size);
2132                         if (delta > lp->tx_ring_size) {
2133                                 if (netif_msg_drv(lp))
2134                                         printk(KERN_ERR
2135                                                "%s: out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
2136                                                dev->name, dirty_tx, lp->cur_tx,
2137                                                lp->tx_full);
2138                                 dirty_tx += lp->tx_ring_size;
2139                                 delta -= lp->tx_ring_size;
2140                         }
2141
2142                         if (lp->tx_full &&
2143                             netif_queue_stopped(dev) &&
2144                             delta < lp->tx_ring_size - 2) {
2145                                 /* The ring is no longer full, clear tbusy. */
2146                                 lp->tx_full = 0;
2147                                 netif_wake_queue(dev);
2148                         }
2149                         lp->dirty_tx = dirty_tx;
2150                 }
2151
2152                 /* Log misc errors. */
2153                 if (csr0 & 0x4000)
2154                         lp->stats.tx_errors++;  /* Tx babble. */
2155                 if (csr0 & 0x1000) {
2156                         /*
2157                          * this happens when our receive ring is full. This shouldn't
2158                          * be a problem as we will see normal rx interrupts for the frames
2159                          * in the receive ring. But there are some PCI chipsets (I can
2160                          * reproduce this on SP3G with Intel saturn chipset) which have
2161                          * sometimes problems and will fill up the receive ring with
2162                          * error descriptors. In this situation we don't get a rx
2163                          * interrupt, but a missed frame interrupt sooner or later.
2164                          * So we try to clean up our receive ring here.
2165                          */
2166                         pcnet32_rx(dev);
2167                         lp->stats.rx_errors++;  /* Missed a Rx frame. */
2168                 }
2169                 if (csr0 & 0x0800) {
2170                         if (netif_msg_drv(lp))
2171                                 printk(KERN_ERR
2172                                        "%s: Bus master arbitration failure, status %4.4x.\n",
2173                                        dev->name, csr0);
2174                         /* unlike for the lance, there is no restart needed */
2175                 }
2176
2177                 if (must_restart) {
2178                         /* reset the chip to clear the error condition, then restart */
2179                         lp->a.reset(ioaddr);
2180                         lp->a.write_csr(ioaddr, 4, 0x0915);
2181                         pcnet32_restart(dev, 0x0002);
2182                         netif_wake_queue(dev);
2183                 }
2184         }
2185
2186         /* Set interrupt enable. */
2187         lp->a.write_csr(ioaddr, 0, 0x0040);
2188         lp->a.write_rap(ioaddr, rap);
2189
2190         if (netif_msg_intr(lp))
2191                 printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
2192                        dev->name, lp->a.read_csr(ioaddr, 0));
2193
2194         spin_unlock(&lp->lock);
2195
2196         return IRQ_HANDLED;
2197 }
2198
2199 static int pcnet32_rx(struct net_device *dev)
2200 {
2201         struct pcnet32_private *lp = dev->priv;
2202         int entry = lp->cur_rx & lp->rx_mod_mask;
2203         int boguscnt = lp->rx_ring_size / 2;
2204
2205         /* If we own the next entry, it's a new packet. Send it up. */
2206         while ((short)le16_to_cpu(lp->rx_ring[entry].status) >= 0) {
2207                 int status = (short)le16_to_cpu(lp->rx_ring[entry].status) >> 8;
2208
2209                 if (status != 0x03) {   /* There was an error. */
2210                         /*
2211                          * There is a tricky error noted by John Murphy,
2212                          * <murf@perftech.com> to Russ Nelson: Even with full-sized
2213                          * buffers it's possible for a jabber packet to use two
2214                          * buffers, with only the last correctly noting the error.
2215                          */
2216                         if (status & 0x01)      /* Only count a general error at the */
2217                                 lp->stats.rx_errors++;  /* end of a packet. */
2218                         if (status & 0x20)
2219                                 lp->stats.rx_frame_errors++;
2220                         if (status & 0x10)
2221                                 lp->stats.rx_over_errors++;
2222                         if (status & 0x08)
2223                                 lp->stats.rx_crc_errors++;
2224                         if (status & 0x04)
2225                                 lp->stats.rx_fifo_errors++;
2226                         lp->rx_ring[entry].status &= le16_to_cpu(0x03ff);
2227                 } else {
2228                         /* Malloc up new buffer, compatible with net-2e. */
2229                         short pkt_len =
2230                             (le32_to_cpu(lp->rx_ring[entry].msg_length) & 0xfff)
2231                             - 4;
2232                         struct sk_buff *skb;
2233
2234                         /* Discard oversize frames. */
2235                         if (unlikely(pkt_len > PKT_BUF_SZ - 2)) {
2236                                 if (netif_msg_drv(lp))
2237                                         printk(KERN_ERR
2238                                                "%s: Impossible packet size %d!\n",
2239                                                dev->name, pkt_len);
2240                                 lp->stats.rx_errors++;
2241                         } else if (pkt_len < 60) {
2242                                 if (netif_msg_rx_err(lp))
2243                                         printk(KERN_ERR "%s: Runt packet!\n",
2244                                                dev->name);
2245                                 lp->stats.rx_errors++;
2246                         } else {
2247                                 int rx_in_place = 0;
2248
2249                                 if (pkt_len > rx_copybreak) {
2250                                         struct sk_buff *newskb;
2251
2252                                         if ((newskb =
2253                                              dev_alloc_skb(PKT_BUF_SZ))) {
2254                                                 skb_reserve(newskb, 2);
2255                                                 skb = lp->rx_skbuff[entry];
2256                                                 pci_unmap_single(lp->pci_dev,
2257                                                                  lp->
2258                                                                  rx_dma_addr
2259                                                                  [entry],
2260                                                                  PKT_BUF_SZ - 2,
2261                                                                  PCI_DMA_FROMDEVICE);
2262                                                 skb_put(skb, pkt_len);
2263                                                 lp->rx_skbuff[entry] = newskb;
2264                                                 newskb->dev = dev;
2265                                                 lp->rx_dma_addr[entry] =
2266                                                     pci_map_single(lp->pci_dev,
2267                                                                    newskb->data,
2268                                                                    PKT_BUF_SZ -
2269                                                                    2,
2270                                                                    PCI_DMA_FROMDEVICE);
2271                                                 lp->rx_ring[entry].base =
2272                                                     le32_to_cpu(lp->
2273                                                                 rx_dma_addr
2274                                                                 [entry]);
2275                                                 rx_in_place = 1;
2276                                         } else
2277                                                 skb = NULL;
2278                                 } else {
2279                                         skb = dev_alloc_skb(pkt_len + 2);
2280                                 }
2281
2282                                 if (skb == NULL) {
2283                                         int i;
2284                                         if (netif_msg_drv(lp))
2285                                                 printk(KERN_ERR
2286                                                        "%s: Memory squeeze, deferring packet.\n",
2287                                                        dev->name);
2288                                         for (i = 0; i < lp->rx_ring_size; i++)
2289                                                 if ((short)
2290                                                     le16_to_cpu(lp->
2291                                                                 rx_ring[(entry +
2292                                                                          i)
2293                                                                         & lp->
2294                                                                         rx_mod_mask].
2295                                                                 status) < 0)
2296                                                         break;
2297
2298                                         if (i > lp->rx_ring_size - 2) {
2299                                                 lp->stats.rx_dropped++;
2300                                                 lp->rx_ring[entry].status |=
2301                                                     le16_to_cpu(0x8000);
2302                                                 wmb();  /* Make sure adapter sees owner change */
2303                                                 lp->cur_rx++;
2304                                         }
2305                                         break;
2306                                 }
2307                                 skb->dev = dev;
2308                                 if (!rx_in_place) {
2309                                         skb_reserve(skb, 2);    /* 16 byte align */
2310                                         skb_put(skb, pkt_len);  /* Make room */
2311                                         pci_dma_sync_single_for_cpu(lp->pci_dev,
2312                                                                     lp->
2313                                                                     rx_dma_addr
2314                                                                     [entry],
2315                                                                     PKT_BUF_SZ -
2316                                                                     2,
2317                                                                     PCI_DMA_FROMDEVICE);
2318                                         eth_copy_and_sum(skb,
2319                                                          (unsigned char *)(lp->
2320                                                                            rx_skbuff
2321                                                                            [entry]->
2322                                                                            data),
2323                                                          pkt_len, 0);
2324                                         pci_dma_sync_single_for_device(lp->
2325                                                                        pci_dev,
2326                                                                        lp->
2327                                                                        rx_dma_addr
2328                                                                        [entry],
2329                                                                        PKT_BUF_SZ
2330                                                                        - 2,
2331                                                                        PCI_DMA_FROMDEVICE);
2332                                 }
2333                                 lp->stats.rx_bytes += skb->len;
2334                                 skb->protocol = eth_type_trans(skb, dev);
2335                                 netif_rx(skb);
2336                                 dev->last_rx = jiffies;
2337                                 lp->stats.rx_packets++;
2338                         }
2339                 }
2340                 /*
2341                  * The docs say that the buffer length isn't touched, but Andrew Boyd
2342                  * of QNX reports that some revs of the 79C965 clear it.
2343                  */
2344                 lp->rx_ring[entry].buf_length = le16_to_cpu(2 - PKT_BUF_SZ);
2345                 wmb();          /* Make sure owner changes after all others are visible */
2346                 lp->rx_ring[entry].status |= le16_to_cpu(0x8000);
2347                 entry = (++lp->cur_rx) & lp->rx_mod_mask;
2348                 if (--boguscnt <= 0)
2349                         break;  /* don't stay in loop forever */
2350         }
2351
2352         return 0;
2353 }
2354
2355 static int pcnet32_close(struct net_device *dev)
2356 {
2357         unsigned long ioaddr = dev->base_addr;
2358         struct pcnet32_private *lp = dev->priv;
2359         int i;
2360         unsigned long flags;
2361
2362         del_timer_sync(&lp->watchdog_timer);
2363
2364         netif_stop_queue(dev);
2365
2366         spin_lock_irqsave(&lp->lock, flags);
2367
2368         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2369
2370         if (netif_msg_ifdown(lp))
2371                 printk(KERN_DEBUG
2372                        "%s: Shutting down ethercard, status was %2.2x.\n",
2373                        dev->name, lp->a.read_csr(ioaddr, 0));
2374
2375         /* We stop the PCNET32 here -- it occasionally polls memory if we don't. */
2376         lp->a.write_csr(ioaddr, 0, 0x0004);
2377
2378         /*
2379          * Switch back to 16bit mode to avoid problems with dumb
2380          * DOS packet driver after a warm reboot
2381          */
2382         lp->a.write_bcr(ioaddr, 20, 4);
2383
2384         spin_unlock_irqrestore(&lp->lock, flags);
2385
2386         free_irq(dev->irq, dev);
2387
2388         spin_lock_irqsave(&lp->lock, flags);
2389
2390         /* free all allocated skbuffs */
2391         for (i = 0; i < lp->rx_ring_size; i++) {
2392                 lp->rx_ring[i].status = 0;
2393                 wmb();          /* Make sure adapter sees owner change */
2394                 if (lp->rx_skbuff[i]) {
2395                         pci_unmap_single(lp->pci_dev, lp->rx_dma_addr[i],
2396                                          PKT_BUF_SZ - 2, PCI_DMA_FROMDEVICE);
2397                         dev_kfree_skb(lp->rx_skbuff[i]);
2398                 }
2399                 lp->rx_skbuff[i] = NULL;
2400                 lp->rx_dma_addr[i] = 0;
2401         }
2402
2403         for (i = 0; i < lp->tx_ring_size; i++) {
2404                 lp->tx_ring[i].status = 0;      /* CPU owns buffer */
2405                 wmb();          /* Make sure adapter sees owner change */
2406                 if (lp->tx_skbuff[i]) {
2407                         pci_unmap_single(lp->pci_dev, lp->tx_dma_addr[i],
2408                                          lp->tx_skbuff[i]->len,
2409                                          PCI_DMA_TODEVICE);
2410                         dev_kfree_skb(lp->tx_skbuff[i]);
2411                 }
2412                 lp->tx_skbuff[i] = NULL;
2413                 lp->tx_dma_addr[i] = 0;
2414         }
2415
2416         spin_unlock_irqrestore(&lp->lock, flags);
2417
2418         return 0;
2419 }
2420
2421 static struct net_device_stats *pcnet32_get_stats(struct net_device *dev)
2422 {
2423         struct pcnet32_private *lp = dev->priv;
2424         unsigned long ioaddr = dev->base_addr;
2425         u16 saved_addr;
2426         unsigned long flags;
2427
2428         spin_lock_irqsave(&lp->lock, flags);
2429         saved_addr = lp->a.read_rap(ioaddr);
2430         lp->stats.rx_missed_errors = lp->a.read_csr(ioaddr, 112);
2431         lp->a.write_rap(ioaddr, saved_addr);
2432         spin_unlock_irqrestore(&lp->lock, flags);
2433
2434         return &lp->stats;
2435 }
2436
2437 /* taken from the sunlance driver, which it took from the depca driver */
2438 static void pcnet32_load_multicast(struct net_device *dev)
2439 {
2440         struct pcnet32_private *lp = dev->priv;
2441         volatile struct pcnet32_init_block *ib = &lp->init_block;
2442         volatile u16 *mcast_table = (u16 *) & ib->filter;
2443         struct dev_mc_list *dmi = dev->mc_list;
2444         char *addrs;
2445         int i;
2446         u32 crc;
2447
2448         /* set all multicast bits */
2449         if (dev->flags & IFF_ALLMULTI) {
2450                 ib->filter[0] = 0xffffffff;
2451                 ib->filter[1] = 0xffffffff;
2452                 return;
2453         }
2454         /* clear the multicast filter */
2455         ib->filter[0] = 0;
2456         ib->filter[1] = 0;
2457
2458         /* Add addresses */
2459         for (i = 0; i < dev->mc_count; i++) {
2460                 addrs = dmi->dmi_addr;
2461                 dmi = dmi->next;
2462
2463                 /* multicast address? */
2464                 if (!(*addrs & 1))
2465                         continue;
2466
2467                 crc = ether_crc_le(6, addrs);
2468                 crc = crc >> 26;
2469                 mcast_table[crc >> 4] =
2470                     le16_to_cpu(le16_to_cpu(mcast_table[crc >> 4]) |
2471                                 (1 << (crc & 0xf)));
2472         }
2473         return;
2474 }
2475
2476 /*
2477  * Set or clear the multicast filter for this adaptor.
2478  */
2479 static void pcnet32_set_multicast_list(struct net_device *dev)
2480 {
2481         unsigned long ioaddr = dev->base_addr, flags;
2482         struct pcnet32_private *lp = dev->priv;
2483
2484         spin_lock_irqsave(&lp->lock, flags);
2485         if (dev->flags & IFF_PROMISC) {
2486                 /* Log any net taps. */
2487                 if (netif_msg_hw(lp))
2488                         printk(KERN_INFO "%s: Promiscuous mode enabled.\n",
2489                                dev->name);
2490                 lp->init_block.mode =
2491                     le16_to_cpu(0x8000 | (lp->options & PCNET32_PORT_PORTSEL) <<
2492                                 7);
2493         } else {
2494                 lp->init_block.mode =
2495                     le16_to_cpu((lp->options & PCNET32_PORT_PORTSEL) << 7);
2496                 pcnet32_load_multicast(dev);
2497         }
2498
2499         lp->a.write_csr(ioaddr, 0, 0x0004);     /* Temporarily stop the lance. */
2500         pcnet32_restart(dev, 0x0042);   /*  Resume normal operation */
2501         netif_wake_queue(dev);
2502
2503         spin_unlock_irqrestore(&lp->lock, flags);
2504 }
2505
2506 /* This routine assumes that the lp->lock is held */
2507 static int mdio_read(struct net_device *dev, int phy_id, int reg_num)
2508 {
2509         struct pcnet32_private *lp = dev->priv;
2510         unsigned long ioaddr = dev->base_addr;
2511         u16 val_out;
2512
2513         if (!lp->mii)
2514                 return 0;
2515
2516         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2517         val_out = lp->a.read_bcr(ioaddr, 34);
2518
2519         return val_out;
2520 }
2521
2522 /* This routine assumes that the lp->lock is held */
2523 static void mdio_write(struct net_device *dev, int phy_id, int reg_num, int val)
2524 {
2525         struct pcnet32_private *lp = dev->priv;
2526         unsigned long ioaddr = dev->base_addr;
2527
2528         if (!lp->mii)
2529                 return;
2530
2531         lp->a.write_bcr(ioaddr, 33, ((phy_id & 0x1f) << 5) | (reg_num & 0x1f));
2532         lp->a.write_bcr(ioaddr, 34, val);
2533 }
2534
2535 static int pcnet32_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2536 {
2537         struct pcnet32_private *lp = dev->priv;
2538         int rc;
2539         unsigned long flags;
2540
2541         /* SIOC[GS]MIIxxx ioctls */
2542         if (lp->mii) {
2543                 spin_lock_irqsave(&lp->lock, flags);
2544                 rc = generic_mii_ioctl(&lp->mii_if, if_mii(rq), cmd, NULL);
2545                 spin_unlock_irqrestore(&lp->lock, flags);
2546         } else {
2547                 rc = -EOPNOTSUPP;
2548         }
2549
2550         return rc;
2551 }
2552
2553 static int pcnet32_check_otherphy(struct net_device *dev)
2554 {
2555         struct pcnet32_private *lp = dev->priv;
2556         struct mii_if_info mii = lp->mii_if;
2557         u16 bmcr;
2558         int i;
2559
2560         for (i = 0; i < PCNET32_MAX_PHYS; i++) {
2561                 if (i == lp->mii_if.phy_id)
2562                         continue;       /* skip active phy */
2563                 if (lp->phymask & (1 << i)) {
2564                         mii.phy_id = i;
2565                         if (mii_link_ok(&mii)) {
2566                                 /* found PHY with active link */
2567                                 if (netif_msg_link(lp))
2568                                         printk(KERN_INFO
2569                                                "%s: Using PHY number %d.\n",
2570                                                dev->name, i);
2571
2572                                 /* isolate inactive phy */
2573                                 bmcr =
2574                                     mdio_read(dev, lp->mii_if.phy_id, MII_BMCR);
2575                                 mdio_write(dev, lp->mii_if.phy_id, MII_BMCR,
2576                                            bmcr | BMCR_ISOLATE);
2577
2578                                 /* de-isolate new phy */
2579                                 bmcr = mdio_read(dev, i, MII_BMCR);
2580                                 mdio_write(dev, i, MII_BMCR,
2581                                            bmcr & ~BMCR_ISOLATE);
2582
2583                                 /* set new phy address */
2584                                 lp->mii_if.phy_id = i;
2585                                 return 1;
2586                         }
2587                 }
2588         }
2589         return 0;
2590 }
2591
2592 /*
2593  * Show the status of the media.  Similar to mii_check_media however it
2594  * correctly shows the link speed for all (tested) pcnet32 variants.
2595  * Devices with no mii just report link state without speed.
2596  *
2597  * Caller is assumed to hold and release the lp->lock.
2598  */
2599
2600 static void pcnet32_check_media(struct net_device *dev, int verbose)
2601 {
2602         struct pcnet32_private *lp = dev->priv;
2603         int curr_link;
2604         int prev_link = netif_carrier_ok(dev) ? 1 : 0;
2605         u32 bcr9;
2606
2607         if (lp->mii) {
2608                 curr_link = mii_link_ok(&lp->mii_if);
2609         } else {
2610                 ulong ioaddr = dev->base_addr;  /* card base I/O address */
2611                 curr_link = (lp->a.read_bcr(ioaddr, 4) != 0xc0);
2612         }
2613         if (!curr_link) {
2614                 if (prev_link || verbose) {
2615                         netif_carrier_off(dev);
2616                         if (netif_msg_link(lp))
2617                                 printk(KERN_INFO "%s: link down\n", dev->name);
2618                 }
2619                 if (lp->phycount > 1) {
2620                         curr_link = pcnet32_check_otherphy(dev);
2621                         prev_link = 0;
2622                 }
2623         } else if (verbose || !prev_link) {
2624                 netif_carrier_on(dev);
2625                 if (lp->mii) {
2626                         if (netif_msg_link(lp)) {
2627                                 struct ethtool_cmd ecmd;
2628                                 mii_ethtool_gset(&lp->mii_if, &ecmd);
2629                                 printk(KERN_INFO
2630                                        "%s: link up, %sMbps, %s-duplex\n",
2631                                        dev->name,
2632                                        (ecmd.speed == SPEED_100) ? "100" : "10",
2633                                        (ecmd.duplex ==
2634                                         DUPLEX_FULL) ? "full" : "half");
2635                         }
2636                         bcr9 = lp->a.read_bcr(dev->base_addr, 9);
2637                         if ((bcr9 & (1 << 0)) != lp->mii_if.full_duplex) {
2638                                 if (lp->mii_if.full_duplex)
2639                                         bcr9 |= (1 << 0);
2640                                 else
2641                                         bcr9 &= ~(1 << 0);
2642                                 lp->a.write_bcr(dev->base_addr, 9, bcr9);
2643                         }
2644                 } else {
2645                         if (netif_msg_link(lp))
2646                                 printk(KERN_INFO "%s: link up\n", dev->name);
2647                 }
2648         }
2649 }
2650
2651 /*
2652  * Check for loss of link and link establishment.
2653  * Can not use mii_check_media because it does nothing if mode is forced.
2654  */
2655
2656 static void pcnet32_watchdog(struct net_device *dev)
2657 {
2658         struct pcnet32_private *lp = dev->priv;
2659         unsigned long flags;
2660
2661         /* Print the link status if it has changed */
2662         spin_lock_irqsave(&lp->lock, flags);
2663         pcnet32_check_media(dev, 0);
2664         spin_unlock_irqrestore(&lp->lock, flags);
2665
2666         mod_timer(&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
2667 }
2668
2669 static void __devexit pcnet32_remove_one(struct pci_dev *pdev)
2670 {
2671         struct net_device *dev = pci_get_drvdata(pdev);
2672
2673         if (dev) {
2674                 struct pcnet32_private *lp = dev->priv;
2675
2676                 unregister_netdev(dev);
2677                 pcnet32_free_ring(dev);
2678                 release_region(dev->base_addr, PCNET32_TOTAL_SIZE);
2679                 pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
2680                 free_netdev(dev);
2681                 pci_disable_device(pdev);
2682                 pci_set_drvdata(pdev, NULL);
2683         }
2684 }
2685
2686 static struct pci_driver pcnet32_driver = {
2687         .name = DRV_NAME,
2688         .probe = pcnet32_probe_pci,
2689         .remove = __devexit_p(pcnet32_remove_one),
2690         .id_table = pcnet32_pci_tbl,
2691 };
2692
2693 /* An additional parameter that may be passed in... */
2694 static int debug = -1;
2695 static int tx_start_pt = -1;
2696 static int pcnet32_have_pci;
2697
2698 module_param(debug, int, 0);
2699 MODULE_PARM_DESC(debug, DRV_NAME " debug level");
2700 module_param(max_interrupt_work, int, 0);
2701 MODULE_PARM_DESC(max_interrupt_work,
2702                  DRV_NAME " maximum events handled per interrupt");
2703 module_param(rx_copybreak, int, 0);
2704 MODULE_PARM_DESC(rx_copybreak,
2705                  DRV_NAME " copy breakpoint for copy-only-tiny-frames");
2706 module_param(tx_start_pt, int, 0);
2707 MODULE_PARM_DESC(tx_start_pt, DRV_NAME " transmit start point (0-3)");
2708 module_param(pcnet32vlb, int, 0);
2709 MODULE_PARM_DESC(pcnet32vlb, DRV_NAME " Vesa local bus (VLB) support (0/1)");
2710 module_param_array(options, int, NULL, 0);
2711 MODULE_PARM_DESC(options, DRV_NAME " initial option setting(s) (0-15)");
2712 module_param_array(full_duplex, int, NULL, 0);
2713 MODULE_PARM_DESC(full_duplex, DRV_NAME " full duplex setting(s) (1)");
2714 /* Module Parameter for HomePNA cards added by Patrick Simmons, 2004 */
2715 module_param_array(homepna, int, NULL, 0);
2716 MODULE_PARM_DESC(homepna,
2717                  DRV_NAME
2718                  " mode for 79C978 cards (1 for HomePNA, 0 for Ethernet, default Ethernet");
2719
2720 MODULE_AUTHOR("Thomas Bogendoerfer");
2721 MODULE_DESCRIPTION("Driver for PCnet32 and PCnetPCI based ethercards");
2722 MODULE_LICENSE("GPL");
2723
2724 #define PCNET32_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
2725
2726 static int __init pcnet32_init_module(void)
2727 {
2728         printk(KERN_INFO "%s", version);
2729
2730         pcnet32_debug = netif_msg_init(debug, PCNET32_MSG_DEFAULT);
2731
2732         if ((tx_start_pt >= 0) && (tx_start_pt <= 3))
2733                 tx_start = tx_start_pt;
2734
2735         /* find the PCI devices */
2736         if (!pci_module_init(&pcnet32_driver))
2737                 pcnet32_have_pci = 1;
2738
2739         /* should we find any remaining VLbus devices ? */
2740         if (pcnet32vlb)
2741                 pcnet32_probe_vlbus();
2742
2743         if (cards_found && (pcnet32_debug & NETIF_MSG_PROBE))
2744                 printk(KERN_INFO PFX "%d cards_found.\n", cards_found);
2745
2746         return (pcnet32_have_pci + cards_found) ? 0 : -ENODEV;
2747 }
2748
2749 static void __exit pcnet32_cleanup_module(void)
2750 {
2751         struct net_device *next_dev;
2752
2753         while (pcnet32_dev) {
2754                 struct pcnet32_private *lp = pcnet32_dev->priv;
2755                 next_dev = lp->next;
2756                 unregister_netdev(pcnet32_dev);
2757                 pcnet32_free_ring(pcnet32_dev);
2758                 release_region(pcnet32_dev->base_addr, PCNET32_TOTAL_SIZE);
2759                 pci_free_consistent(lp->pci_dev, sizeof(*lp), lp, lp->dma_addr);
2760                 free_netdev(pcnet32_dev);
2761                 pcnet32_dev = next_dev;
2762         }
2763
2764         if (pcnet32_have_pci)
2765                 pci_unregister_driver(&pcnet32_driver);
2766 }
2767
2768 module_init(pcnet32_init_module);
2769 module_exit(pcnet32_cleanup_module);
2770
2771 /*
2772  * Local variables:
2773  *  c-indent-level: 4
2774  *  tab-width: 8
2775  * End:
2776  */