Version:  2.0.40 2.2.26 2.4.37 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0

Linux/drivers/net/ethernet/hp/hp100.c

  1 /*
  2 ** hp100.c
  3 ** HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters
  4 **
  5 ** $Id: hp100.c,v 1.58 2001/09/24 18:03:01 perex Exp perex $
  6 **
  7 ** Based on the HP100 driver written by Jaroslav Kysela <perex@jcu.cz>
  8 ** Extended for new busmaster capable chipsets by
  9 ** Siegfried "Frieder" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>
 10 **
 11 ** Maintained by: Jaroslav Kysela <perex@perex.cz>
 12 **
 13 ** This driver has only been tested with
 14 ** -- HP J2585B 10/100 Mbit/s PCI Busmaster
 15 ** -- HP J2585A 10/100 Mbit/s PCI
 16 ** -- HP J2970A 10 Mbit/s PCI Combo 10base-T/BNC
 17 ** -- HP J2973A 10 Mbit/s PCI 10base-T
 18 ** -- HP J2573  10/100 ISA
 19 ** -- Compex ReadyLink ENET100-VG4  10/100 Mbit/s PCI / EISA
 20 ** -- Compex FreedomLine 100/VG  10/100 Mbit/s ISA / EISA / PCI
 21 **
 22 ** but it should also work with the other CASCADE based adapters.
 23 **
 24 ** TODO:
 25 **       -  J2573 seems to hang sometimes when in shared memory mode.
 26 **       -  Mode for Priority TX
 27 **       -  Check PCI registers, performance might be improved?
 28 **       -  To reduce interrupt load in busmaster, one could switch off
 29 **          the interrupts that are used to refill the queues whenever the
 30 **          queues are filled up to more than a certain threshold.
 31 **       -  some updates for EISA version of card
 32 **
 33 **
 34 **   This code is free software; you can redistribute it and/or modify
 35 **   it under the terms of the GNU General Public License as published by
 36 **   the Free Software Foundation; either version 2 of the License, or
 37 **   (at your option) any later version.
 38 **
 39 **   This code is distributed in the hope that it will be useful,
 40 **   but WITHOUT ANY WARRANTY; without even the implied warranty of
 41 **   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 42 **   GNU General Public License for more details.
 43 **
 44 **   You should have received a copy of the GNU General Public License
 45 **   along with this program; if not, write to the Free Software
 46 **   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 47 **
 48 ** 1.57c -> 1.58
 49 **   - used indent to change coding-style
 50 **   - added KTI DP-200 EISA ID
 51 **   - ioremap is also used for low (<1MB) memory (multi-architecture support)
 52 **
 53 ** 1.57b -> 1.57c - Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 54 **   - release resources on failure in init_module
 55 **
 56 ** 1.57 -> 1.57b - Jean II
 57 **   - fix spinlocks, SMP is now working !
 58 **
 59 ** 1.56 -> 1.57
 60 **   - updates for new PCI interface for 2.1 kernels
 61 **
 62 ** 1.55 -> 1.56
 63 **   - removed printk in misc. interrupt and update statistics to allow
 64 **     monitoring of card status
 65 **   - timing changes in xmit routines, relogin to 100VG hub added when
 66 **     driver does reset
 67 **   - included fix for Compex FreedomLine PCI adapter
 68 **
 69 ** 1.54 -> 1.55
 70 **   - fixed bad initialization in init_module
 71 **   - added Compex FreedomLine adapter
 72 **   - some fixes in card initialization
 73 **
 74 ** 1.53 -> 1.54
 75 **   - added hardware multicast filter support (doesn't work)
 76 **   - little changes in hp100_sense_lan routine
 77 **     - added support for Coax and AUI (J2970)
 78 **   - fix for multiple cards and hp100_mode parameter (insmod)
 79 **   - fix for shared IRQ
 80 **
 81 ** 1.52 -> 1.53
 82 **   - fixed bug in multicast support
 83 **
 84 */
 85 
 86 #define HP100_DEFAULT_PRIORITY_TX 0
 87 
 88 #undef HP100_DEBUG
 89 #undef HP100_DEBUG_B            /* Trace  */
 90 #undef HP100_DEBUG_BM           /* Debug busmaster code (PDL stuff) */
 91 
 92 #undef HP100_DEBUG_TRAINING     /* Debug login-to-hub procedure */
 93 #undef HP100_DEBUG_TX
 94 #undef HP100_DEBUG_IRQ
 95 #undef HP100_DEBUG_RX
 96 
 97 #undef HP100_MULTICAST_FILTER   /* Need to be debugged... */
 98 
 99 #include <linux/module.h>
100 #include <linux/kernel.h>
101 #include <linux/sched.h>
102 #include <linux/string.h>
103 #include <linux/errno.h>
104 #include <linux/ioport.h>
105 #include <linux/interrupt.h>
106 #include <linux/eisa.h>
107 #include <linux/pci.h>
108 #include <linux/dma-mapping.h>
109 #include <linux/spinlock.h>
110 #include <linux/netdevice.h>
111 #include <linux/etherdevice.h>
112 #include <linux/skbuff.h>
113 #include <linux/types.h>
114 #include <linux/delay.h>
115 #include <linux/init.h>
116 #include <linux/bitops.h>
117 #include <linux/jiffies.h>
118 
119 #include <asm/io.h>
120 
121 #include "hp100.h"
122 
123 /*
124  *  defines
125  */
126 
127 #define HP100_BUS_ISA     0
128 #define HP100_BUS_EISA    1
129 #define HP100_BUS_PCI     2
130 
131 #define HP100_REGION_SIZE       0x20    /* for ioports */
132 #define HP100_SIG_LEN           8       /* same as EISA_SIG_LEN */
133 
134 #define HP100_MAX_PACKET_SIZE   (1536+4)
135 #define HP100_MIN_PACKET_SIZE   60
136 
137 #ifndef HP100_DEFAULT_RX_RATIO
138 /* default - 75% onboard memory on the card are used for RX packets */
139 #define HP100_DEFAULT_RX_RATIO  75
140 #endif
141 
142 #ifndef HP100_DEFAULT_PRIORITY_TX
143 /* default - don't enable transmit outgoing packets as priority */
144 #define HP100_DEFAULT_PRIORITY_TX 0
145 #endif
146 
147 /*
148  *  structures
149  */
150 
151 struct hp100_private {
152         spinlock_t lock;
153         char id[HP100_SIG_LEN];
154         u_short chip;
155         u_short soft_model;
156         u_int memory_size;
157         u_int virt_memory_size;
158         u_short rx_ratio;       /* 1 - 99 */
159         u_short priority_tx;    /* != 0 - priority tx */
160         u_short mode;           /* PIO, Shared Mem or Busmaster */
161         u_char bus;
162         struct pci_dev *pci_dev;
163         short mem_mapped;       /* memory mapped access */
164         void __iomem *mem_ptr_virt;     /* virtual memory mapped area, maybe NULL */
165         unsigned long mem_ptr_phys;     /* physical memory mapped area */
166         short lan_type;         /* 10Mb/s, 100Mb/s or -1 (error) */
167         int hub_status;         /* was login to hub successful? */
168         u_char mac1_mode;
169         u_char mac2_mode;
170         u_char hash_bytes[8];
171 
172         /* Rings for busmaster mode: */
173         hp100_ring_t *rxrhead;  /* Head (oldest) index into rxring */
174         hp100_ring_t *rxrtail;  /* Tail (newest) index into rxring */
175         hp100_ring_t *txrhead;  /* Head (oldest) index into txring */
176         hp100_ring_t *txrtail;  /* Tail (newest) index into txring */
177 
178         hp100_ring_t rxring[MAX_RX_PDL];
179         hp100_ring_t txring[MAX_TX_PDL];
180 
181         u_int *page_vaddr_algn; /* Aligned virtual address of allocated page */
182         u_long whatever_offset; /* Offset to bus/phys/dma address */
183         int rxrcommit;          /* # Rx PDLs committed to adapter */
184         int txrcommit;          /* # Tx PDLs committed to adapter */
185 };
186 
187 /*
188  *  variables
189  */
190 #ifdef CONFIG_ISA
191 static const char *hp100_isa_tbl[] = {
192         "HWPF150", /* HP J2573 rev A */
193         "HWP1950", /* HP J2573 */
194 };
195 #endif
196 
197 #ifdef CONFIG_EISA
198 static struct eisa_device_id hp100_eisa_tbl[] = {
199         { "HWPF180" }, /* HP J2577 rev A */
200         { "HWP1920" }, /* HP 27248B */
201         { "HWP1940" }, /* HP J2577 */
202         { "HWP1990" }, /* HP J2577 */
203         { "CPX0301" }, /* ReadyLink ENET100-VG4 */
204         { "CPX0401" }, /* FreedomLine 100/VG */
205         { "" }         /* Mandatory final entry ! */
206 };
207 MODULE_DEVICE_TABLE(eisa, hp100_eisa_tbl);
208 #endif
209 
210 #ifdef CONFIG_PCI
211 static const struct pci_device_id hp100_pci_tbl[] = {
212         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585A, PCI_ANY_ID, PCI_ANY_ID,},
213         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2585B, PCI_ANY_ID, PCI_ANY_ID,},
214         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2970A, PCI_ANY_ID, PCI_ANY_ID,},
215         {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_J2973A, PCI_ANY_ID, PCI_ANY_ID,},
216         {PCI_VENDOR_ID_COMPEX, PCI_DEVICE_ID_COMPEX_ENET100VG4, PCI_ANY_ID, PCI_ANY_ID,},
217         {PCI_VENDOR_ID_COMPEX2, PCI_DEVICE_ID_COMPEX2_100VG, PCI_ANY_ID, PCI_ANY_ID,},
218 /*      {PCI_VENDOR_ID_KTI, PCI_DEVICE_ID_KTI_DP200, PCI_ANY_ID, PCI_ANY_ID }, */
219         {}                      /* Terminating entry */
220 };
221 MODULE_DEVICE_TABLE(pci, hp100_pci_tbl);
222 #endif
223 
224 static int hp100_rx_ratio = HP100_DEFAULT_RX_RATIO;
225 static int hp100_priority_tx = HP100_DEFAULT_PRIORITY_TX;
226 static int hp100_mode = 1;
227 
228 module_param(hp100_rx_ratio, int, 0);
229 module_param(hp100_priority_tx, int, 0);
230 module_param(hp100_mode, int, 0);
231 
232 /*
233  *  prototypes
234  */
235 
236 static int hp100_probe1(struct net_device *dev, int ioaddr, u_char bus,
237                         struct pci_dev *pci_dev);
238 
239 
240 static int hp100_open(struct net_device *dev);
241 static int hp100_close(struct net_device *dev);
242 static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
243                                     struct net_device *dev);
244 static netdev_tx_t hp100_start_xmit_bm(struct sk_buff *skb,
245                                        struct net_device *dev);
246 static void hp100_rx(struct net_device *dev);
247 static struct net_device_stats *hp100_get_stats(struct net_device *dev);
248 static void hp100_misc_interrupt(struct net_device *dev);
249 static void hp100_update_stats(struct net_device *dev);
250 static void hp100_clear_stats(struct hp100_private *lp, int ioaddr);
251 static void hp100_set_multicast_list(struct net_device *dev);
252 static irqreturn_t hp100_interrupt(int irq, void *dev_id);
253 static void hp100_start_interface(struct net_device *dev);
254 static void hp100_stop_interface(struct net_device *dev);
255 static void hp100_load_eeprom(struct net_device *dev, u_short ioaddr);
256 static int hp100_sense_lan(struct net_device *dev);
257 static int hp100_login_to_vg_hub(struct net_device *dev,
258                                  u_short force_relogin);
259 static int hp100_down_vg_link(struct net_device *dev);
260 static void hp100_cascade_reset(struct net_device *dev, u_short enable);
261 static void hp100_BM_shutdown(struct net_device *dev);
262 static void hp100_mmuinit(struct net_device *dev);
263 static void hp100_init_pdls(struct net_device *dev);
264 static int hp100_init_rxpdl(struct net_device *dev,
265                             register hp100_ring_t * ringptr,
266                             register u_int * pdlptr);
267 static int hp100_init_txpdl(struct net_device *dev,
268                             register hp100_ring_t * ringptr,
269                             register u_int * pdlptr);
270 static void hp100_rxfill(struct net_device *dev);
271 static void hp100_hwinit(struct net_device *dev);
272 static void hp100_clean_txring(struct net_device *dev);
273 #ifdef HP100_DEBUG
274 static void hp100_RegisterDump(struct net_device *dev);
275 #endif
276 
277 /* Conversion to new PCI API :
278  * Convert an address in a kernel buffer to a bus/phys/dma address.
279  * This work *only* for memory fragments part of lp->page_vaddr,
280  * because it was properly DMA allocated via pci_alloc_consistent(),
281  * so we just need to "retrieve" the original mapping to bus/phys/dma
282  * address - Jean II */
283 static inline dma_addr_t virt_to_whatever(struct net_device *dev, u32 * ptr)
284 {
285         struct hp100_private *lp = netdev_priv(dev);
286         return ((u_long) ptr) + lp->whatever_offset;
287 }
288 
289 static inline u_int pdl_map_data(struct hp100_private *lp, void *data)
290 {
291         return pci_map_single(lp->pci_dev, data,
292                               MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);
293 }
294 
295 /* TODO: This function should not really be needed in a good design... */
296 static void wait(void)
297 {
298         mdelay(1);
299 }
300 
301 /*
302  *  probe functions
303  *  These functions should - if possible - avoid doing write operations
304  *  since this could cause problems when the card is not installed.
305  */
306 
307 /*
308  * Read board id and convert to string.
309  * Effectively same code as decode_eisa_sig
310  */
311 static const char *hp100_read_id(int ioaddr)
312 {
313         int i;
314         static char str[HP100_SIG_LEN];
315         unsigned char sig[4], sum;
316         unsigned short rev;
317 
318         hp100_page(ID_MAC_ADDR);
319         sum = 0;
320         for (i = 0; i < 4; i++) {
321                 sig[i] = hp100_inb(BOARD_ID + i);
322                 sum += sig[i];
323         }
324 
325         sum += hp100_inb(BOARD_ID + i);
326         if (sum != 0xff)
327                 return NULL;    /* bad checksum */
328 
329         str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
330         str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
331         str[2] = (sig[1] & 0x1f) + ('A' - 1);
332         rev = (sig[2] << 8) | sig[3];
333         sprintf(str + 3, "%04X", rev);
334 
335         return str;
336 }
337 
338 #ifdef CONFIG_ISA
339 static __init int hp100_isa_probe1(struct net_device *dev, int ioaddr)
340 {
341         const char *sig;
342         int i;
343 
344         if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
345                 goto err;
346 
347         if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE) {
348                 release_region(ioaddr, HP100_REGION_SIZE);
349                 goto err;
350         }
351 
352         sig = hp100_read_id(ioaddr);
353         release_region(ioaddr, HP100_REGION_SIZE);
354 
355         if (sig == NULL)
356                 goto err;
357 
358         for (i = 0; i < ARRAY_SIZE(hp100_isa_tbl); i++) {
359                 if (!strcmp(hp100_isa_tbl[i], sig))
360                         break;
361 
362         }
363 
364         if (i < ARRAY_SIZE(hp100_isa_tbl))
365                 return hp100_probe1(dev, ioaddr, HP100_BUS_ISA, NULL);
366  err:
367         return -ENODEV;
368 
369 }
370 /*
371  * Probe for ISA board.
372  * EISA and PCI are handled by device infrastructure.
373  */
374 
375 static int  __init hp100_isa_probe(struct net_device *dev, int addr)
376 {
377         int err = -ENODEV;
378 
379         /* Probe for a specific ISA address */
380         if (addr > 0xff && addr < 0x400)
381                 err = hp100_isa_probe1(dev, addr);
382 
383         else if (addr != 0)
384                 err = -ENXIO;
385 
386         else {
387                 /* Probe all ISA possible port regions */
388                 for (addr = 0x100; addr < 0x400; addr += 0x20) {
389                         err = hp100_isa_probe1(dev, addr);
390                         if (!err)
391                                 break;
392                 }
393         }
394         return err;
395 }
396 #endif /* CONFIG_ISA */
397 
398 #if !defined(MODULE) && defined(CONFIG_ISA)
399 struct net_device * __init hp100_probe(int unit)
400 {
401         struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
402         int err;
403 
404         if (!dev)
405                 return ERR_PTR(-ENODEV);
406 
407 #ifdef HP100_DEBUG_B
408         hp100_outw(0x4200, TRACE);
409         printk("hp100: %s: probe\n", dev->name);
410 #endif
411 
412         if (unit >= 0) {
413                 sprintf(dev->name, "eth%d", unit);
414                 netdev_boot_setup_check(dev);
415         }
416 
417         err = hp100_isa_probe(dev, dev->base_addr);
418         if (err)
419                 goto out;
420 
421         return dev;
422  out:
423         free_netdev(dev);
424         return ERR_PTR(err);
425 }
426 #endif /* !MODULE && CONFIG_ISA */
427 
428 static const struct net_device_ops hp100_bm_netdev_ops = {
429         .ndo_open               = hp100_open,
430         .ndo_stop               = hp100_close,
431         .ndo_start_xmit         = hp100_start_xmit_bm,
432         .ndo_get_stats          = hp100_get_stats,
433         .ndo_set_rx_mode        = hp100_set_multicast_list,
434         .ndo_change_mtu         = eth_change_mtu,
435         .ndo_set_mac_address    = eth_mac_addr,
436         .ndo_validate_addr      = eth_validate_addr,
437 };
438 
439 static const struct net_device_ops hp100_netdev_ops = {
440         .ndo_open               = hp100_open,
441         .ndo_stop               = hp100_close,
442         .ndo_start_xmit         = hp100_start_xmit,
443         .ndo_get_stats          = hp100_get_stats,
444         .ndo_set_rx_mode        = hp100_set_multicast_list,
445         .ndo_change_mtu         = eth_change_mtu,
446         .ndo_set_mac_address    = eth_mac_addr,
447         .ndo_validate_addr      = eth_validate_addr,
448 };
449 
450 static int hp100_probe1(struct net_device *dev, int ioaddr, u_char bus,
451                         struct pci_dev *pci_dev)
452 {
453         int i;
454         int err = -ENODEV;
455         const char *eid;
456         u_int chip;
457         u_char uc;
458         u_int memory_size = 0, virt_memory_size = 0;
459         u_short local_mode, lsw;
460         short mem_mapped;
461         unsigned long mem_ptr_phys;
462         void __iomem *mem_ptr_virt;
463         struct hp100_private *lp;
464 
465 #ifdef HP100_DEBUG_B
466         hp100_outw(0x4201, TRACE);
467         printk("hp100: %s: probe1\n", dev->name);
468 #endif
469 
470         /* memory region for programmed i/o */
471         if (!request_region(ioaddr, HP100_REGION_SIZE, "hp100"))
472                 goto out1;
473 
474         if (hp100_inw(HW_ID) != HP100_HW_ID_CASCADE)
475                 goto out2;
476 
477         chip = hp100_inw(PAGING) & HP100_CHIPID_MASK;
478 #ifdef HP100_DEBUG
479         if (chip == HP100_CHIPID_SHASTA)
480                 printk("hp100: %s: Shasta Chip detected. (This is a pre 802.12 chip)\n", dev->name);
481         else if (chip == HP100_CHIPID_RAINIER)
482                 printk("hp100: %s: Rainier Chip detected. (This is a pre 802.12 chip)\n", dev->name);
483         else if (chip == HP100_CHIPID_LASSEN)
484                 printk("hp100: %s: Lassen Chip detected.\n", dev->name);
485         else
486                 printk("hp100: %s: Warning: Unknown CASCADE chip (id=0x%.4x).\n", dev->name, chip);
487 #endif
488 
489         dev->base_addr = ioaddr;
490 
491         eid = hp100_read_id(ioaddr);
492         if (eid == NULL) {      /* bad checksum? */
493                 printk(KERN_WARNING "%s: bad ID checksum at base port 0x%x\n",
494                        __func__, ioaddr);
495                 goto out2;
496         }
497 
498         hp100_page(ID_MAC_ADDR);
499         for (i = uc = 0; i < 7; i++)
500                 uc += hp100_inb(LAN_ADDR + i);
501         if (uc != 0xff) {
502                 printk(KERN_WARNING
503                        "%s: bad lan address checksum at port 0x%x)\n",
504                        __func__, ioaddr);
505                 err = -EIO;
506                 goto out2;
507         }
508 
509         /* Make sure, that all registers are correctly updated... */
510 
511         hp100_load_eeprom(dev, ioaddr);
512         wait();
513 
514         /*
515          * Determine driver operation mode
516          *
517          * Use the variable "hp100_mode" upon insmod or as kernel parameter to
518          * force driver modes:
519          * hp100_mode=1 -> default, use busmaster mode if configured.
520          * hp100_mode=2 -> enable shared memory mode
521          * hp100_mode=3 -> force use of i/o mapped mode.
522          * hp100_mode=4 -> same as 1, but re-set the enable bit on the card.
523          */
524 
525         /*
526          * LSW values:
527          *   0x2278 -> J2585B, PnP shared memory mode
528          *   0x2270 -> J2585B, shared memory mode, 0xdc000
529          *   0xa23c -> J2585B, I/O mapped mode
530          *   0x2240 -> EISA COMPEX, BusMaster (Shasta Chip)
531          *   0x2220 -> EISA HP, I/O (Shasta Chip)
532          *   0x2260 -> EISA HP, BusMaster (Shasta Chip)
533          */
534 
535 #if 0
536         local_mode = 0x2270;
537         hp100_outw(0xfefe, OPTION_LSW);
538         hp100_outw(local_mode | HP100_SET_LB | HP100_SET_HB, OPTION_LSW);
539 #endif
540 
541         /* hp100_mode value maybe used in future by another card */
542         local_mode = hp100_mode;
543         if (local_mode < 1 || local_mode > 4)
544                 local_mode = 1; /* default */
545 #ifdef HP100_DEBUG
546         printk("hp100: %s: original LSW = 0x%x\n", dev->name,
547                hp100_inw(OPTION_LSW));
548 #endif
549 
550         if (local_mode == 3) {
551                 hp100_outw(HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
552                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
553                 hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
554                 printk("hp100: IO mapped mode forced.\n");
555         } else if (local_mode == 2) {
556                 hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
557                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
558                 hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
559                 printk("hp100: Shared memory mode requested.\n");
560         } else if (local_mode == 4) {
561                 if (chip == HP100_CHIPID_LASSEN) {
562                         hp100_outw(HP100_BM_WRITE | HP100_BM_READ | HP100_SET_HB, OPTION_LSW);
563                         hp100_outw(HP100_IO_EN | HP100_MEM_EN | HP100_RESET_LB, OPTION_LSW);
564                         printk("hp100: Busmaster mode requested.\n");
565                 }
566                 local_mode = 1;
567         }
568 
569         if (local_mode == 1) {  /* default behaviour */
570                 lsw = hp100_inw(OPTION_LSW);
571 
572                 if ((lsw & HP100_IO_EN) && (~lsw & HP100_MEM_EN) &&
573                     (~lsw & (HP100_BM_WRITE | HP100_BM_READ))) {
574 #ifdef HP100_DEBUG
575                         printk("hp100: %s: IO_EN bit is set on card.\n", dev->name);
576 #endif
577                         local_mode = 3;
578                 } else if (chip == HP100_CHIPID_LASSEN &&
579                            (lsw & (HP100_BM_WRITE | HP100_BM_READ)) == (HP100_BM_WRITE | HP100_BM_READ)) {
580                         /* Conversion to new PCI API :
581                          * I don't have the doc, but I assume that the card
582                          * can map the full 32bit address space.
583                          * Also, we can have EISA Busmaster cards (not tested),
584                          * so beware !!! - Jean II */
585                         if((bus == HP100_BUS_PCI) &&
586                            (pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32)))) {
587                                 /* Gracefully fallback to shared memory */
588                                 goto busmasterfail;
589                         }
590                         printk("hp100: Busmaster mode enabled.\n");
591                         hp100_outw(HP100_MEM_EN | HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);
592                 } else {
593                 busmasterfail:
594 #ifdef HP100_DEBUG
595                         printk("hp100: %s: Card not configured for BM or BM not supported with this card.\n", dev->name);
596                         printk("hp100: %s: Trying shared memory mode.\n", dev->name);
597 #endif
598                         /* In this case, try shared memory mode */
599                         local_mode = 2;
600                         hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
601                         /* hp100_outw(HP100_IO_EN|HP100_RESET_LB, OPTION_LSW); */
602                 }
603         }
604 #ifdef HP100_DEBUG
605         printk("hp100: %s: new LSW = 0x%x\n", dev->name, hp100_inw(OPTION_LSW));
606 #endif
607 
608         /* Check for shared memory on the card, eventually remap it */
609         hp100_page(HW_MAP);
610         mem_mapped = ((hp100_inw(OPTION_LSW) & (HP100_MEM_EN)) != 0);
611         mem_ptr_phys = 0UL;
612         mem_ptr_virt = NULL;
613         memory_size = (8192 << ((hp100_inb(SRAM) >> 5) & 0x07));
614         virt_memory_size = 0;
615 
616         /* For memory mapped or busmaster mode, we want the memory address */
617         if (mem_mapped || (local_mode == 1)) {
618                 mem_ptr_phys = (hp100_inw(MEM_MAP_LSW) | (hp100_inw(MEM_MAP_MSW) << 16));
619                 mem_ptr_phys &= ~0x1fff;        /* 8k alignment */
620 
621                 if (bus == HP100_BUS_ISA && (mem_ptr_phys & ~0xfffff) != 0) {
622                         printk("hp100: Can only use programmed i/o mode.\n");
623                         mem_ptr_phys = 0;
624                         mem_mapped = 0;
625                         local_mode = 3; /* Use programmed i/o */
626                 }
627 
628                 /* We do not need access to shared memory in busmaster mode */
629                 /* However in slave mode we need to remap high (>1GB) card memory  */
630                 if (local_mode != 1) {  /* = not busmaster */
631                         /* We try with smaller memory sizes, if ioremap fails */
632                         for (virt_memory_size = memory_size; virt_memory_size > 16383; virt_memory_size >>= 1) {
633                                 if ((mem_ptr_virt = ioremap((u_long) mem_ptr_phys, virt_memory_size)) == NULL) {
634 #ifdef HP100_DEBUG
635                                         printk("hp100: %s: ioremap for 0x%x bytes high PCI memory at 0x%lx failed\n", dev->name, virt_memory_size, mem_ptr_phys);
636 #endif
637                                 } else {
638 #ifdef HP100_DEBUG
639                                         printk("hp100: %s: remapped 0x%x bytes high PCI memory at 0x%lx to %p.\n", dev->name, virt_memory_size, mem_ptr_phys, mem_ptr_virt);
640 #endif
641                                         break;
642                                 }
643                         }
644 
645                         if (mem_ptr_virt == NULL) {     /* all ioremap tries failed */
646                                 printk("hp100: Failed to ioremap the PCI card memory. Will have to use i/o mapped mode.\n");
647                                 local_mode = 3;
648                                 virt_memory_size = 0;
649                         }
650                 }
651         }
652 
653         if (local_mode == 3) {  /* io mapped forced */
654                 mem_mapped = 0;
655                 mem_ptr_phys = 0;
656                 mem_ptr_virt = NULL;
657                 printk("hp100: Using (slow) programmed i/o mode.\n");
658         }
659 
660         /* Initialise the "private" data structure for this card. */
661         lp = netdev_priv(dev);
662 
663         spin_lock_init(&lp->lock);
664         strlcpy(lp->id, eid, HP100_SIG_LEN);
665         lp->chip = chip;
666         lp->mode = local_mode;
667         lp->bus = bus;
668         lp->pci_dev = pci_dev;
669         lp->priority_tx = hp100_priority_tx;
670         lp->rx_ratio = hp100_rx_ratio;
671         lp->mem_ptr_phys = mem_ptr_phys;
672         lp->mem_ptr_virt = mem_ptr_virt;
673         hp100_page(ID_MAC_ADDR);
674         lp->soft_model = hp100_inb(SOFT_MODEL);
675         lp->mac1_mode = HP100_MAC1MODE3;
676         lp->mac2_mode = HP100_MAC2MODE3;
677         memset(&lp->hash_bytes, 0x00, 8);
678 
679         dev->base_addr = ioaddr;
680 
681         lp->memory_size = memory_size;
682         lp->virt_memory_size = virt_memory_size;
683         lp->rx_ratio = hp100_rx_ratio;  /* can be conf'd with insmod */
684 
685         if (lp->mode == 1)      /* busmaster */
686                 dev->netdev_ops = &hp100_bm_netdev_ops;
687         else
688                 dev->netdev_ops = &hp100_netdev_ops;
689 
690         /* Ask the card for which IRQ line it is configured */
691         if (bus == HP100_BUS_PCI) {
692                 dev->irq = pci_dev->irq;
693         } else {
694                 hp100_page(HW_MAP);
695                 dev->irq = hp100_inb(IRQ_CHANNEL) & HP100_IRQMASK;
696                 if (dev->irq == 2)
697                         dev->irq = 9;
698         }
699 
700         if (lp->mode == 1)      /* busmaster */
701                 dev->dma = 4;
702 
703         /* Ask the card for its MAC address and store it for later use. */
704         hp100_page(ID_MAC_ADDR);
705         for (i = uc = 0; i < 6; i++)
706                 dev->dev_addr[i] = hp100_inb(LAN_ADDR + i);
707 
708         /* Reset statistics (counters) */
709         hp100_clear_stats(lp, ioaddr);
710 
711         /* If busmaster mode is wanted, a dma-capable memory area is needed for
712          * the rx and tx PDLs
713          * PCI cards can access the whole PC memory. Therefore GFP_DMA is not
714          * needed for the allocation of the memory area.
715          */
716 
717         /* TODO: We do not need this with old cards, where PDLs are stored
718          * in the cards shared memory area. But currently, busmaster has been
719          * implemented/tested only with the lassen chip anyway... */
720         if (lp->mode == 1) {    /* busmaster */
721                 dma_addr_t page_baddr;
722                 /* Get physically continuous memory for TX & RX PDLs    */
723                 /* Conversion to new PCI API :
724                  * Pages are always aligned and zeroed, no need to it ourself.
725                  * Doc says should be OK for EISA bus as well - Jean II */
726                 lp->page_vaddr_algn = pci_alloc_consistent(lp->pci_dev, MAX_RINGSIZE, &page_baddr);
727                 if (!lp->page_vaddr_algn) {
728                         err = -ENOMEM;
729                         goto out_mem_ptr;
730                 }
731                 lp->whatever_offset = ((u_long) page_baddr) - ((u_long) lp->page_vaddr_algn);
732 
733 #ifdef HP100_DEBUG_BM
734                 printk("hp100: %s: Reserved DMA memory from 0x%x to 0x%x\n", dev->name, (u_int) lp->page_vaddr_algn, (u_int) lp->page_vaddr_algn + MAX_RINGSIZE);
735 #endif
736                 lp->rxrcommit = lp->txrcommit = 0;
737                 lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);
738                 lp->txrhead = lp->txrtail = &(lp->txring[0]);
739         }
740 
741         /* Initialise the card. */
742         /* (I'm not really sure if it's a good idea to do this during probing, but
743          * like this it's assured that the lan connection type can be sensed
744          * correctly)
745          */
746         hp100_hwinit(dev);
747 
748         /* Try to find out which kind of LAN the card is connected to. */
749         lp->lan_type = hp100_sense_lan(dev);
750 
751         /* Print out a message what about what we think we have probed. */
752         printk("hp100: at 0x%x, IRQ %d, ", ioaddr, dev->irq);
753         switch (bus) {
754         case HP100_BUS_EISA:
755                 printk("EISA");
756                 break;
757         case HP100_BUS_PCI:
758                 printk("PCI");
759                 break;
760         default:
761                 printk("ISA");
762                 break;
763         }
764         printk(" bus, %dk SRAM (rx/tx %d%%).\n", lp->memory_size >> 10, lp->rx_ratio);
765 
766         if (lp->mode == 2) {    /* memory mapped */
767                 printk("hp100: Memory area at 0x%lx-0x%lx", mem_ptr_phys,
768                                 (mem_ptr_phys + (mem_ptr_phys > 0x100000 ? (u_long) lp->memory_size : 16 * 1024)) - 1);
769                 if (mem_ptr_virt)
770                         printk(" (virtual base %p)", mem_ptr_virt);
771                 printk(".\n");
772 
773                 /* Set for info when doing ifconfig */
774                 dev->mem_start = mem_ptr_phys;
775                 dev->mem_end = mem_ptr_phys + lp->memory_size;
776         }
777 
778         printk("hp100: ");
779         if (lp->lan_type != HP100_LAN_ERR)
780                 printk("Adapter is attached to ");
781         switch (lp->lan_type) {
782         case HP100_LAN_100:
783                 printk("100Mb/s Voice Grade AnyLAN network.\n");
784                 break;
785         case HP100_LAN_10:
786                 printk("10Mb/s network (10baseT).\n");
787                 break;
788         case HP100_LAN_COAX:
789                 printk("10Mb/s network (coax).\n");
790                 break;
791         default:
792                 printk("Warning! Link down.\n");
793         }
794 
795         err = register_netdev(dev);
796         if (err)
797                 goto out3;
798 
799         return 0;
800 out3:
801         if (local_mode == 1)
802                 pci_free_consistent(lp->pci_dev, MAX_RINGSIZE + 0x0f,
803                                     lp->page_vaddr_algn,
804                                     virt_to_whatever(dev, lp->page_vaddr_algn));
805 out_mem_ptr:
806         if (mem_ptr_virt)
807                 iounmap(mem_ptr_virt);
808 out2:
809         release_region(ioaddr, HP100_REGION_SIZE);
810 out1:
811         return err;
812 }
813 
814 /* This procedure puts the card into a stable init state */
815 static void hp100_hwinit(struct net_device *dev)
816 {
817         int ioaddr = dev->base_addr;
818         struct hp100_private *lp = netdev_priv(dev);
819 
820 #ifdef HP100_DEBUG_B
821         hp100_outw(0x4202, TRACE);
822         printk("hp100: %s: hwinit\n", dev->name);
823 #endif
824 
825         /* Initialise the card. -------------------------------------------- */
826 
827         /* Clear all pending Ints and disable Ints */
828         hp100_page(PERFORMANCE);
829         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
830         hp100_outw(0xffff, IRQ_STATUS); /* clear all pending ints */
831 
832         hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
833         hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);
834 
835         if (lp->mode == 1) {
836                 hp100_BM_shutdown(dev); /* disables BM, puts cascade in reset */
837                 wait();
838         } else {
839                 hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
840                 hp100_cascade_reset(dev, 1);
841                 hp100_page(MAC_CTRL);
842                 hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);
843         }
844 
845         /* Initiate EEPROM reload */
846         hp100_load_eeprom(dev, 0);
847 
848         wait();
849 
850         /* Go into reset again. */
851         hp100_cascade_reset(dev, 1);
852 
853         /* Set Option Registers to a safe state  */
854         hp100_outw(HP100_DEBUG_EN |
855                    HP100_RX_HDR |
856                    HP100_EE_EN |
857                    HP100_BM_WRITE |
858                    HP100_BM_READ | HP100_RESET_HB |
859                    HP100_FAKE_INT |
860                    HP100_INT_EN |
861                    HP100_MEM_EN |
862                    HP100_IO_EN | HP100_RESET_LB, OPTION_LSW);
863 
864         hp100_outw(HP100_TRI_INT |
865                    HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);
866 
867         hp100_outb(HP100_PRIORITY_TX |
868                    HP100_ADV_NXT_PKT |
869                    HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);
870 
871         /* TODO: Configure MMU for Ram Test. */
872         /* TODO: Ram Test. */
873 
874         /* Re-check if adapter is still at same i/o location      */
875         /* (If the base i/o in eeprom has been changed but the    */
876         /* registers had not been changed, a reload of the eeprom */
877         /* would move the adapter to the address stored in eeprom */
878 
879         /* TODO: Code to implement. */
880 
881         /* Until here it was code from HWdiscover procedure. */
882         /* Next comes code from mmuinit procedure of SCO BM driver which is
883          * called from HWconfigure in the SCO driver.  */
884 
885         /* Initialise MMU, eventually switch on Busmaster Mode, initialise
886          * multicast filter...
887          */
888         hp100_mmuinit(dev);
889 
890         /* We don't turn the interrupts on here - this is done by start_interface. */
891         wait();                 /* TODO: Do we really need this? */
892 
893         /* Enable Hardware (e.g. unreset) */
894         hp100_cascade_reset(dev, 0);
895 
896         /* ------- initialisation complete ----------- */
897 
898         /* Finally try to log in the Hub if there may be a VG connection. */
899         if ((lp->lan_type == HP100_LAN_100) || (lp->lan_type == HP100_LAN_ERR))
900                 hp100_login_to_vg_hub(dev, 0);  /* relogin */
901 
902 }
903 
904 
905 /*
906  * mmuinit - Reinitialise Cascade MMU and MAC settings.
907  * Note: Must already be in reset and leaves card in reset.
908  */
909 static void hp100_mmuinit(struct net_device *dev)
910 {
911         int ioaddr = dev->base_addr;
912         struct hp100_private *lp = netdev_priv(dev);
913         int i;
914 
915 #ifdef HP100_DEBUG_B
916         hp100_outw(0x4203, TRACE);
917         printk("hp100: %s: mmuinit\n", dev->name);
918 #endif
919 
920 #ifdef HP100_DEBUG
921         if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
922                 printk("hp100: %s: Not in reset when entering mmuinit. Fix me.\n", dev->name);
923                 return;
924         }
925 #endif
926 
927         /* Make sure IRQs are masked off and ack'ed. */
928         hp100_page(PERFORMANCE);
929         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
930         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
931 
932         /*
933          * Enable Hardware
934          * - Clear Debug En, Rx Hdr Pipe, EE En, I/O En, Fake Int and Intr En
935          * - Set Tri-State Int, Bus Master Rd/Wr, and Mem Map Disable
936          * - Clear Priority, Advance Pkt and Xmit Cmd
937          */
938 
939         hp100_outw(HP100_DEBUG_EN |
940                    HP100_RX_HDR |
941                    HP100_EE_EN | HP100_RESET_HB |
942                    HP100_IO_EN |
943                    HP100_FAKE_INT |
944                    HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
945 
946         hp100_outw(HP100_TRI_INT | HP100_SET_HB, OPTION_LSW);
947 
948         if (lp->mode == 1) {    /* busmaster */
949                 hp100_outw(HP100_BM_WRITE |
950                            HP100_BM_READ |
951                            HP100_MMAP_DIS | HP100_SET_HB, OPTION_LSW);
952         } else if (lp->mode == 2) {     /* memory mapped */
953                 hp100_outw(HP100_BM_WRITE |
954                            HP100_BM_READ | HP100_RESET_HB, OPTION_LSW);
955                 hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
956                 hp100_outw(HP100_MEM_EN | HP100_SET_LB, OPTION_LSW);
957                 hp100_outw(HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
958         } else if (lp->mode == 3) {     /* i/o mapped mode */
959                 hp100_outw(HP100_MMAP_DIS | HP100_SET_HB |
960                            HP100_IO_EN | HP100_SET_LB, OPTION_LSW);
961         }
962 
963         hp100_page(HW_MAP);
964         hp100_outb(0, EARLYRXCFG);
965         hp100_outw(0, EARLYTXCFG);
966 
967         /*
968          * Enable Bus Master mode
969          */
970         if (lp->mode == 1) {    /* busmaster */
971                 /* Experimental: Set some PCI configuration bits */
972                 hp100_page(HW_MAP);
973                 hp100_andb(~HP100_PDL_USE3, MODECTRL1); /* BM engine read maximum */
974                 hp100_andb(~HP100_TX_DUALQ, MODECTRL1); /* No Queue for Priority TX */
975 
976                 /* PCI Bus failures should result in a Misc. Interrupt */
977                 hp100_orb(HP100_EN_BUS_FAIL, MODECTRL2);
978 
979                 hp100_outw(HP100_BM_READ | HP100_BM_WRITE | HP100_SET_HB, OPTION_LSW);
980                 hp100_page(HW_MAP);
981                 /* Use Burst Mode and switch on PAGE_CK */
982                 hp100_orb(HP100_BM_BURST_RD | HP100_BM_BURST_WR, BM);
983                 if ((lp->chip == HP100_CHIPID_RAINIER) || (lp->chip == HP100_CHIPID_SHASTA))
984                         hp100_orb(HP100_BM_PAGE_CK, BM);
985                 hp100_orb(HP100_BM_MASTER, BM);
986         } else {                /* not busmaster */
987 
988                 hp100_page(HW_MAP);
989                 hp100_andb(~HP100_BM_MASTER, BM);
990         }
991 
992         /*
993          * Divide card memory into regions for Rx, Tx and, if non-ETR chip, PDLs
994          */
995         hp100_page(MMU_CFG);
996         if (lp->mode == 1) {    /* only needed for Busmaster */
997                 int xmit_stop, recv_stop;
998 
999                 if ((lp->chip == HP100_CHIPID_RAINIER) ||
1000                     (lp->chip == HP100_CHIPID_SHASTA)) {
1001                         int pdl_stop;
1002 
1003                         /*
1004                          * Each pdl is 508 bytes long. (63 frags * 4 bytes for address and
1005                          * 4 bytes for header). We will leave NUM_RXPDLS * 508 (rounded
1006                          * to the next higher 1k boundary) bytes for the rx-pdl's
1007                          * Note: For non-etr chips the transmit stop register must be
1008                          * programmed on a 1k boundary, i.e. bits 9:0 must be zero.
1009                          */
1010                         pdl_stop = lp->memory_size;
1011                         xmit_stop = (pdl_stop - 508 * (MAX_RX_PDL) - 16) & ~(0x03ff);
1012                         recv_stop = (xmit_stop * (lp->rx_ratio) / 100) & ~(0x03ff);
1013                         hp100_outw((pdl_stop >> 4) - 1, PDL_MEM_STOP);
1014 #ifdef HP100_DEBUG_BM
1015                         printk("hp100: %s: PDL_STOP = 0x%x\n", dev->name, pdl_stop);
1016 #endif
1017                 } else {
1018                         /* ETR chip (Lassen) in busmaster mode */
1019                         xmit_stop = (lp->memory_size) - 1;
1020                         recv_stop = ((lp->memory_size * lp->rx_ratio) / 100) & ~(0x03ff);
1021                 }
1022 
1023                 hp100_outw(xmit_stop >> 4, TX_MEM_STOP);
1024                 hp100_outw(recv_stop >> 4, RX_MEM_STOP);
1025 #ifdef HP100_DEBUG_BM
1026                 printk("hp100: %s: TX_STOP  = 0x%x\n", dev->name, xmit_stop >> 4);
1027                 printk("hp100: %s: RX_STOP  = 0x%x\n", dev->name, recv_stop >> 4);
1028 #endif
1029         } else {
1030                 /* Slave modes (memory mapped and programmed io)  */
1031                 hp100_outw((((lp->memory_size * lp->rx_ratio) / 100) >> 4), RX_MEM_STOP);
1032                 hp100_outw(((lp->memory_size - 1) >> 4), TX_MEM_STOP);
1033 #ifdef HP100_DEBUG
1034                 printk("hp100: %s: TX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(TX_MEM_STOP));
1035                 printk("hp100: %s: RX_MEM_STOP: 0x%x\n", dev->name, hp100_inw(RX_MEM_STOP));
1036 #endif
1037         }
1038 
1039         /* Write MAC address into page 1 */
1040         hp100_page(MAC_ADDRESS);
1041         for (i = 0; i < 6; i++)
1042                 hp100_outb(dev->dev_addr[i], MAC_ADDR + i);
1043 
1044         /* Zero the multicast hash registers */
1045         for (i = 0; i < 8; i++)
1046                 hp100_outb(0x0, HASH_BYTE0 + i);
1047 
1048         /* Set up MAC defaults */
1049         hp100_page(MAC_CTRL);
1050 
1051         /* Go to LAN Page and zero all filter bits */
1052         /* Zero accept error, accept multicast, accept broadcast and accept */
1053         /* all directed packet bits */
1054         hp100_andb(~(HP100_RX_EN |
1055                      HP100_TX_EN |
1056                      HP100_ACC_ERRORED |
1057                      HP100_ACC_MC |
1058                      HP100_ACC_BC | HP100_ACC_PHY), MAC_CFG_1);
1059 
1060         hp100_outb(0x00, MAC_CFG_2);
1061 
1062         /* Zero the frame format bit. This works around a training bug in the */
1063         /* new hubs. */
1064         hp100_outb(0x00, VG_LAN_CFG_2); /* (use 802.3) */
1065 
1066         if (lp->priority_tx)
1067                 hp100_outb(HP100_PRIORITY_TX | HP100_SET_LB, OPTION_MSW);
1068         else
1069                 hp100_outb(HP100_PRIORITY_TX | HP100_RESET_LB, OPTION_MSW);
1070 
1071         hp100_outb(HP100_ADV_NXT_PKT |
1072                    HP100_TX_CMD | HP100_RESET_LB, OPTION_MSW);
1073 
1074         /* If busmaster, initialize the PDLs */
1075         if (lp->mode == 1)
1076                 hp100_init_pdls(dev);
1077 
1078         /* Go to performance page and initialize isr and imr registers */
1079         hp100_page(PERFORMANCE);
1080         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
1081         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
1082 }
1083 
1084 /*
1085  *  open/close functions
1086  */
1087 
1088 static int hp100_open(struct net_device *dev)
1089 {
1090         struct hp100_private *lp = netdev_priv(dev);
1091 #ifdef HP100_DEBUG_B
1092         int ioaddr = dev->base_addr;
1093 #endif
1094 
1095 #ifdef HP100_DEBUG_B
1096         hp100_outw(0x4204, TRACE);
1097         printk("hp100: %s: open\n", dev->name);
1098 #endif
1099 
1100         /* New: if bus is PCI or EISA, interrupts might be shared interrupts */
1101         if (request_irq(dev->irq, hp100_interrupt,
1102                         lp->bus == HP100_BUS_PCI || lp->bus ==
1103                         HP100_BUS_EISA ? IRQF_SHARED : 0,
1104                         dev->name, dev)) {
1105                 printk("hp100: %s: unable to get IRQ %d\n", dev->name, dev->irq);
1106                 return -EAGAIN;
1107         }
1108 
1109         dev->trans_start = jiffies; /* prevent tx timeout */
1110         netif_start_queue(dev);
1111 
1112         lp->lan_type = hp100_sense_lan(dev);
1113         lp->mac1_mode = HP100_MAC1MODE3;
1114         lp->mac2_mode = HP100_MAC2MODE3;
1115         memset(&lp->hash_bytes, 0x00, 8);
1116 
1117         hp100_stop_interface(dev);
1118 
1119         hp100_hwinit(dev);
1120 
1121         hp100_start_interface(dev);     /* sets mac modes, enables interrupts */
1122 
1123         return 0;
1124 }
1125 
1126 /* The close function is called when the interface is to be brought down */
1127 static int hp100_close(struct net_device *dev)
1128 {
1129         int ioaddr = dev->base_addr;
1130         struct hp100_private *lp = netdev_priv(dev);
1131 
1132 #ifdef HP100_DEBUG_B
1133         hp100_outw(0x4205, TRACE);
1134         printk("hp100: %s: close\n", dev->name);
1135 #endif
1136 
1137         hp100_page(PERFORMANCE);
1138         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all IRQs */
1139 
1140         hp100_stop_interface(dev);
1141 
1142         if (lp->lan_type == HP100_LAN_100)
1143                 lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1144 
1145         netif_stop_queue(dev);
1146 
1147         free_irq(dev->irq, dev);
1148 
1149 #ifdef HP100_DEBUG
1150         printk("hp100: %s: close LSW = 0x%x\n", dev->name,
1151                hp100_inw(OPTION_LSW));
1152 #endif
1153 
1154         return 0;
1155 }
1156 
1157 
1158 /*
1159  * Configure the PDL Rx rings and LAN
1160  */
1161 static void hp100_init_pdls(struct net_device *dev)
1162 {
1163         struct hp100_private *lp = netdev_priv(dev);
1164         hp100_ring_t *ringptr;
1165         u_int *pageptr;         /* Warning : increment by 4 - Jean II */
1166         int i;
1167 
1168 #ifdef HP100_DEBUG_B
1169         int ioaddr = dev->base_addr;
1170 #endif
1171 
1172 #ifdef HP100_DEBUG_B
1173         hp100_outw(0x4206, TRACE);
1174         printk("hp100: %s: init pdls\n", dev->name);
1175 #endif
1176 
1177         if (!lp->page_vaddr_algn)
1178                 printk("hp100: %s: Warning: lp->page_vaddr_algn not initialised!\n", dev->name);
1179         else {
1180                 /* pageptr shall point into the DMA accessible memory region  */
1181                 /* we use this pointer to status the upper limit of allocated */
1182                 /* memory in the allocated page. */
1183                 /* note: align the pointers to the pci cache line size */
1184                 memset(lp->page_vaddr_algn, 0, MAX_RINGSIZE);   /* Zero  Rx/Tx ring page */
1185                 pageptr = lp->page_vaddr_algn;
1186 
1187                 lp->rxrcommit = 0;
1188                 ringptr = lp->rxrhead = lp->rxrtail = &(lp->rxring[0]);
1189 
1190                 /* Initialise Rx Ring */
1191                 for (i = MAX_RX_PDL - 1; i >= 0; i--) {
1192                         lp->rxring[i].next = ringptr;
1193                         ringptr = &(lp->rxring[i]);
1194                         pageptr += hp100_init_rxpdl(dev, ringptr, pageptr);
1195                 }
1196 
1197                 /* Initialise Tx Ring */
1198                 lp->txrcommit = 0;
1199                 ringptr = lp->txrhead = lp->txrtail = &(lp->txring[0]);
1200                 for (i = MAX_TX_PDL - 1; i >= 0; i--) {
1201                         lp->txring[i].next = ringptr;
1202                         ringptr = &(lp->txring[i]);
1203                         pageptr += hp100_init_txpdl(dev, ringptr, pageptr);
1204                 }
1205         }
1206 }
1207 
1208 
1209 /* These functions "format" the entries in the pdl structure   */
1210 /* They return how much memory the fragments need.            */
1211 static int hp100_init_rxpdl(struct net_device *dev,
1212                             register hp100_ring_t * ringptr,
1213                             register u32 * pdlptr)
1214 {
1215         /* pdlptr is starting address for this pdl */
1216 
1217         if (0 != (((unsigned long) pdlptr) & 0xf))
1218                 printk("hp100: %s: Init rxpdl: Unaligned pdlptr 0x%lx.\n",
1219                        dev->name, (unsigned long) pdlptr);
1220 
1221         ringptr->pdl = pdlptr + 1;
1222         ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr + 1);
1223         ringptr->skb = NULL;
1224 
1225         /*
1226          * Write address and length of first PDL Fragment (which is used for
1227          * storing the RX-Header
1228          * We use the 4 bytes _before_ the PDH in the pdl memory area to
1229          * store this information. (PDH is at offset 0x04)
1230          */
1231         /* Note that pdlptr+1 and not pdlptr is the pointer to the PDH */
1232 
1233         *(pdlptr + 2) = (u_int) virt_to_whatever(dev, pdlptr);  /* Address Frag 1 */
1234         *(pdlptr + 3) = 4;      /* Length  Frag 1 */
1235 
1236         return roundup(MAX_RX_FRAG * 2 + 2, 4);
1237 }
1238 
1239 
1240 static int hp100_init_txpdl(struct net_device *dev,
1241                             register hp100_ring_t * ringptr,
1242                             register u32 * pdlptr)
1243 {
1244         if (0 != (((unsigned long) pdlptr) & 0xf))
1245                 printk("hp100: %s: Init txpdl: Unaligned pdlptr 0x%lx.\n", dev->name, (unsigned long) pdlptr);
1246 
1247         ringptr->pdl = pdlptr;  /* +1; */
1248         ringptr->pdl_paddr = virt_to_whatever(dev, pdlptr);     /* +1 */
1249         ringptr->skb = NULL;
1250 
1251         return roundup(MAX_TX_FRAG * 2 + 2, 4);
1252 }
1253 
1254 /*
1255  * hp100_build_rx_pdl allocates an skb_buff of maximum size plus two bytes
1256  * for possible odd word alignment rounding up to next dword and set PDL
1257  * address for fragment#2
1258  * Returns: 0 if unable to allocate skb_buff
1259  *          1 if successful
1260  */
1261 static int hp100_build_rx_pdl(hp100_ring_t * ringptr,
1262                               struct net_device *dev)
1263 {
1264 #ifdef HP100_DEBUG_B
1265         int ioaddr = dev->base_addr;
1266 #endif
1267 #ifdef HP100_DEBUG_BM
1268         u_int *p;
1269 #endif
1270 
1271 #ifdef HP100_DEBUG_B
1272         hp100_outw(0x4207, TRACE);
1273         printk("hp100: %s: build rx pdl\n", dev->name);
1274 #endif
1275 
1276         /* Allocate skb buffer of maximum size */
1277         /* Note: This depends on the alloc_skb functions allocating more
1278          * space than requested, i.e. aligning to 16bytes */
1279 
1280         ringptr->skb = netdev_alloc_skb(dev, roundup(MAX_ETHER_SIZE + 2, 4));
1281 
1282         if (NULL != ringptr->skb) {
1283                 /*
1284                  * Reserve 2 bytes at the head of the buffer to land the IP header
1285                  * on a long word boundary (According to the Network Driver section
1286                  * in the Linux KHG, this should help to increase performance.)
1287                  */
1288                 skb_reserve(ringptr->skb, 2);
1289 
1290                 ringptr->skb->data = (u_char *) skb_put(ringptr->skb, MAX_ETHER_SIZE);
1291 
1292                 /* ringptr->pdl points to the beginning of the PDL, i.e. the PDH */
1293                 /* Note: 1st Fragment is used for the 4 byte packet status
1294                  * (receive header). Its PDL entries are set up by init_rxpdl. So
1295                  * here we only have to set up the PDL fragment entries for the data
1296                  * part. Those 4 bytes will be stored in the DMA memory region
1297                  * directly before the PDL.
1298                  */
1299 #ifdef HP100_DEBUG_BM
1300                 printk("hp100: %s: build_rx_pdl: PDH@0x%x, skb->data (len %d) at 0x%x\n",
1301                                      dev->name, (u_int) ringptr->pdl,
1302                                      roundup(MAX_ETHER_SIZE + 2, 4),
1303                                      (unsigned int) ringptr->skb->data);
1304 #endif
1305 
1306                 /* Conversion to new PCI API : map skbuf data to PCI bus.
1307                  * Doc says it's OK for EISA as well - Jean II */
1308                 ringptr->pdl[0] = 0x00020000;   /* Write PDH */
1309                 ringptr->pdl[3] = pdl_map_data(netdev_priv(dev),
1310                                                ringptr->skb->data);
1311                 ringptr->pdl[4] = MAX_ETHER_SIZE;       /* Length of Data */
1312 
1313 #ifdef HP100_DEBUG_BM
1314                 for (p = (ringptr->pdl); p < (ringptr->pdl + 5); p++)
1315                         printk("hp100: %s: Adr 0x%.8x = 0x%.8x\n", dev->name, (u_int) p, (u_int) * p);
1316 #endif
1317                 return 1;
1318         }
1319         /* else: */
1320         /* alloc_skb failed (no memory) -> still can receive the header
1321          * fragment into PDL memory. make PDL safe by clearing msgptr and
1322          * making the PDL only 1 fragment (i.e. the 4 byte packet status)
1323          */
1324 #ifdef HP100_DEBUG_BM
1325         printk("hp100: %s: build_rx_pdl: PDH@0x%x, No space for skb.\n", dev->name, (u_int) ringptr->pdl);
1326 #endif
1327 
1328         ringptr->pdl[0] = 0x00010000;   /* PDH: Count=1 Fragment */
1329 
1330         return 0;
1331 }
1332 
1333 /*
1334  *  hp100_rxfill - attempt to fill the Rx Ring will empty skb's
1335  *
1336  * Makes assumption that skb's are always contiguous memory areas and
1337  * therefore PDLs contain only 2 physical fragments.
1338  * -  While the number of Rx PDLs with buffers is less than maximum
1339  *      a.  Get a maximum packet size skb
1340  *      b.  Put the physical address of the buffer into the PDL.
1341  *      c.  Output physical address of PDL to adapter.
1342  */
1343 static void hp100_rxfill(struct net_device *dev)
1344 {
1345         int ioaddr = dev->base_addr;
1346 
1347         struct hp100_private *lp = netdev_priv(dev);
1348         hp100_ring_t *ringptr;
1349 
1350 #ifdef HP100_DEBUG_B
1351         hp100_outw(0x4208, TRACE);
1352         printk("hp100: %s: rxfill\n", dev->name);
1353 #endif
1354 
1355         hp100_page(PERFORMANCE);
1356 
1357         while (lp->rxrcommit < MAX_RX_PDL) {
1358                 /*
1359                    ** Attempt to get a buffer and build a Rx PDL.
1360                  */
1361                 ringptr = lp->rxrtail;
1362                 if (0 == hp100_build_rx_pdl(ringptr, dev)) {
1363                         return; /* None available, return */
1364                 }
1365 
1366                 /* Hand this PDL over to the card */
1367                 /* Note: This needs performance page selected! */
1368 #ifdef HP100_DEBUG_BM
1369                 printk("hp100: %s: rxfill: Hand to card: pdl #%d @0x%x phys:0x%x, buffer: 0x%x\n",
1370                                      dev->name, lp->rxrcommit, (u_int) ringptr->pdl,
1371                                      (u_int) ringptr->pdl_paddr, (u_int) ringptr->pdl[3]);
1372 #endif
1373 
1374                 hp100_outl((u32) ringptr->pdl_paddr, RX_PDA);
1375 
1376                 lp->rxrcommit += 1;
1377                 lp->rxrtail = ringptr->next;
1378         }
1379 }
1380 
1381 /*
1382  * BM_shutdown - shutdown bus mastering and leave chip in reset state
1383  */
1384 
1385 static void hp100_BM_shutdown(struct net_device *dev)
1386 {
1387         int ioaddr = dev->base_addr;
1388         struct hp100_private *lp = netdev_priv(dev);
1389         unsigned long time;
1390 
1391 #ifdef HP100_DEBUG_B
1392         hp100_outw(0x4209, TRACE);
1393         printk("hp100: %s: bm shutdown\n", dev->name);
1394 #endif
1395 
1396         hp100_page(PERFORMANCE);
1397         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
1398         hp100_outw(0xffff, IRQ_STATUS); /* Ack all ints */
1399 
1400         /* Ensure Interrupts are off */
1401         hp100_outw(HP100_INT_EN | HP100_RESET_LB, OPTION_LSW);
1402 
1403         /* Disable all MAC activity */
1404         hp100_page(MAC_CTRL);
1405         hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);    /* stop rx/tx */
1406 
1407         /* If cascade MMU is not already in reset */
1408         if (0 != (hp100_inw(OPTION_LSW) & HP100_HW_RST)) {
1409                 /* Wait 1.3ms (10Mb max packet time) to ensure MAC is idle so
1410                  * MMU pointers will not be reset out from underneath
1411                  */
1412                 hp100_page(MAC_CTRL);
1413                 for (time = 0; time < 5000; time++) {
1414                         if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE))
1415                                 break;
1416                 }
1417 
1418                 /* Shutdown algorithm depends on the generation of Cascade */
1419                 if (lp->chip == HP100_CHIPID_LASSEN) {  /* ETR shutdown/reset */
1420                         /* Disable Busmaster mode and wait for bit to go to zero. */
1421                         hp100_page(HW_MAP);
1422                         hp100_andb(~HP100_BM_MASTER, BM);
1423                         /* 100 ms timeout */
1424                         for (time = 0; time < 32000; time++) {
1425                                 if (0 == (hp100_inb(BM) & HP100_BM_MASTER))
1426                                         break;
1427                         }
1428                 } else {        /* Shasta or Rainier Shutdown/Reset */
1429                         /* To ensure all bus master inloading activity has ceased,
1430                          * wait for no Rx PDAs or no Rx packets on card.
1431                          */
1432                         hp100_page(PERFORMANCE);
1433                         /* 100 ms timeout */
1434                         for (time = 0; time < 10000; time++) {
1435                                 /* RX_PDL: PDLs not executed. */
1436                                 /* RX_PKT_CNT: RX'd packets on card. */
1437                                 if ((hp100_inb(RX_PDL) == 0) && (hp100_inb(RX_PKT_CNT) == 0))
1438                                         break;
1439                         }
1440 
1441                         if (time >= 10000)
1442                                 printk("hp100: %s: BM shutdown error.\n", dev->name);
1443 
1444                         /* To ensure all bus master outloading activity has ceased,
1445                          * wait until the Tx PDA count goes to zero or no more Tx space
1446                          * available in the Tx region of the card.
1447                          */
1448                         /* 100 ms timeout */
1449                         for (time = 0; time < 10000; time++) {
1450                                 if ((0 == hp100_inb(TX_PKT_CNT)) &&
1451                                     (0 != (hp100_inb(TX_MEM_FREE) & HP100_AUTO_COMPARE)))
1452                                         break;
1453                         }
1454 
1455                         /* Disable Busmaster mode */
1456                         hp100_page(HW_MAP);
1457                         hp100_andb(~HP100_BM_MASTER, BM);
1458                 }       /* end of shutdown procedure for non-etr parts */
1459 
1460                 hp100_cascade_reset(dev, 1);
1461         }
1462         hp100_page(PERFORMANCE);
1463         /* hp100_outw( HP100_BM_READ | HP100_BM_WRITE | HP100_RESET_HB, OPTION_LSW ); */
1464         /* Busmaster mode should be shut down now. */
1465 }
1466 
1467 static int hp100_check_lan(struct net_device *dev)
1468 {
1469         struct hp100_private *lp = netdev_priv(dev);
1470 
1471         if (lp->lan_type < 0) { /* no LAN type detected yet? */
1472                 hp100_stop_interface(dev);
1473                 if ((lp->lan_type = hp100_sense_lan(dev)) < 0) {
1474                         printk("hp100: %s: no connection found - check wire\n", dev->name);
1475                         hp100_start_interface(dev);     /* 10Mb/s RX packets maybe handled */
1476                         return -EIO;
1477                 }
1478                 if (lp->lan_type == HP100_LAN_100)
1479                         lp->hub_status = hp100_login_to_vg_hub(dev, 0); /* relogin */
1480                 hp100_start_interface(dev);
1481         }
1482         return 0;
1483 }
1484 
1485 /*
1486  *  transmit functions
1487  */
1488 
1489 /* tx function for busmaster mode */
1490 static netdev_tx_t hp100_start_xmit_bm(struct sk_buff *skb,
1491                                        struct net_device *dev)
1492 {
1493         unsigned long flags;
1494         int i, ok_flag;
1495         int ioaddr = dev->base_addr;
1496         struct hp100_private *lp = netdev_priv(dev);
1497         hp100_ring_t *ringptr;
1498 
1499 #ifdef HP100_DEBUG_B
1500         hp100_outw(0x4210, TRACE);
1501         printk("hp100: %s: start_xmit_bm\n", dev->name);
1502 #endif
1503         if (skb->len <= 0)
1504                 goto drop;
1505 
1506         if (lp->chip == HP100_CHIPID_SHASTA && skb_padto(skb, ETH_ZLEN))
1507                 return NETDEV_TX_OK;
1508 
1509         /* Get Tx ring tail pointer */
1510         if (lp->txrtail->next == lp->txrhead) {
1511                 /* No memory. */
1512 #ifdef HP100_DEBUG
1513                 printk("hp100: %s: start_xmit_bm: No TX PDL available.\n", dev->name);
1514 #endif
1515                 /* not waited long enough since last tx? */
1516                 if (time_before(jiffies, dev_trans_start(dev) + HZ))
1517                         goto drop;
1518 
1519                 if (hp100_check_lan(dev))
1520                         goto drop;
1521 
1522                 if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
1523                         /* we have a 100Mb/s adapter but it isn't connected to hub */
1524                         printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
1525                         hp100_stop_interface(dev);
1526                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1527                         hp100_start_interface(dev);
1528                 } else {
1529                         spin_lock_irqsave(&lp->lock, flags);
1530                         hp100_ints_off();       /* Useful ? Jean II */
1531                         i = hp100_sense_lan(dev);
1532                         hp100_ints_on();
1533                         spin_unlock_irqrestore(&lp->lock, flags);
1534                         if (i == HP100_LAN_ERR)
1535                                 printk("hp100: %s: link down detected\n", dev->name);
1536                         else if (lp->lan_type != i) {   /* cable change! */
1537                                 /* it's very hard - all network settings must be changed!!! */
1538                                 printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
1539                                 lp->lan_type = i;
1540                                 hp100_stop_interface(dev);
1541                                 if (lp->lan_type == HP100_LAN_100)
1542                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1543                                 hp100_start_interface(dev);
1544                         } else {
1545                                 printk("hp100: %s: interface reset\n", dev->name);
1546                                 hp100_stop_interface(dev);
1547                                 if (lp->lan_type == HP100_LAN_100)
1548                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1549                                 hp100_start_interface(dev);
1550                         }
1551                 }
1552 
1553                 goto drop;
1554         }
1555 
1556         /*
1557          * we have to turn int's off before modifying this, otherwise
1558          * a tx_pdl_cleanup could occur at the same time
1559          */
1560         spin_lock_irqsave(&lp->lock, flags);
1561         ringptr = lp->txrtail;
1562         lp->txrtail = ringptr->next;
1563 
1564         /* Check whether packet has minimal packet size */
1565         ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
1566         i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;
1567 
1568         ringptr->skb = skb;
1569         ringptr->pdl[0] = ((1 << 16) | i);      /* PDH: 1 Fragment & length */
1570         if (lp->chip == HP100_CHIPID_SHASTA) {
1571                 /* TODO:Could someone who has the EISA card please check if this works? */
1572                 ringptr->pdl[2] = i;
1573         } else {                /* Lassen */
1574                 /* In the PDL, don't use the padded size but the real packet size: */
1575                 ringptr->pdl[2] = skb->len;     /* 1st Frag: Length of frag */
1576         }
1577         /* Conversion to new PCI API : map skbuf data to PCI bus.
1578          * Doc says it's OK for EISA as well - Jean II */
1579         ringptr->pdl[1] = ((u32) pci_map_single(lp->pci_dev, skb->data, ringptr->pdl[2], PCI_DMA_TODEVICE));    /* 1st Frag: Adr. of data */
1580 
1581         /* Hand this PDL to the card. */
1582         hp100_outl(ringptr->pdl_paddr, TX_PDA_L);       /* Low Prio. Queue */
1583 
1584         lp->txrcommit++;
1585 
1586         dev->stats.tx_packets++;
1587         dev->stats.tx_bytes += skb->len;
1588 
1589         spin_unlock_irqrestore(&lp->lock, flags);
1590 
1591         return NETDEV_TX_OK;
1592 
1593 drop:
1594         dev_kfree_skb(skb);
1595         return NETDEV_TX_OK;
1596 }
1597 
1598 
1599 /* clean_txring checks if packets have been sent by the card by reading
1600  * the TX_PDL register from the performance page and comparing it to the
1601  * number of committed packets. It then frees the skb's of the packets that
1602  * obviously have been sent to the network.
1603  *
1604  * Needs the PERFORMANCE page selected.
1605  */
1606 static void hp100_clean_txring(struct net_device *dev)
1607 {
1608         struct hp100_private *lp = netdev_priv(dev);
1609         int ioaddr = dev->base_addr;
1610         int donecount;
1611 
1612 #ifdef HP100_DEBUG_B
1613         hp100_outw(0x4211, TRACE);
1614         printk("hp100: %s: clean txring\n", dev->name);
1615 #endif
1616 
1617         /* How many PDLs have been transmitted? */
1618         donecount = (lp->txrcommit) - hp100_inb(TX_PDL);
1619 
1620 #ifdef HP100_DEBUG
1621         if (donecount > MAX_TX_PDL)
1622                 printk("hp100: %s: Warning: More PDLs transmitted than committed to card???\n", dev->name);
1623 #endif
1624 
1625         for (; 0 != donecount; donecount--) {
1626 #ifdef HP100_DEBUG_BM
1627                 printk("hp100: %s: Free skb: data @0x%.8x txrcommit=0x%x TXPDL=0x%x, done=0x%x\n",
1628                                 dev->name, (u_int) lp->txrhead->skb->data,
1629                                 lp->txrcommit, hp100_inb(TX_PDL), donecount);
1630 #endif
1631                 /* Conversion to new PCI API : NOP */
1632                 pci_unmap_single(lp->pci_dev, (dma_addr_t) lp->txrhead->pdl[1], lp->txrhead->pdl[2], PCI_DMA_TODEVICE);
1633                 dev_consume_skb_any(lp->txrhead->skb);
1634                 lp->txrhead->skb = NULL;
1635                 lp->txrhead = lp->txrhead->next;
1636                 lp->txrcommit--;
1637         }
1638 }
1639 
1640 /* tx function for slave modes */
1641 static netdev_tx_t hp100_start_xmit(struct sk_buff *skb,
1642                                     struct net_device *dev)
1643 {
1644         unsigned long flags;
1645         int i, ok_flag;
1646         int ioaddr = dev->base_addr;
1647         u_short val;
1648         struct hp100_private *lp = netdev_priv(dev);
1649 
1650 #ifdef HP100_DEBUG_B
1651         hp100_outw(0x4212, TRACE);
1652         printk("hp100: %s: start_xmit\n", dev->name);
1653 #endif
1654         if (skb->len <= 0)
1655                 goto drop;
1656 
1657         if (hp100_check_lan(dev))
1658                 goto drop;
1659 
1660         /* If there is not enough free memory on the card... */
1661         i = hp100_inl(TX_MEM_FREE) & 0x7fffffff;
1662         if (!(((i / 2) - 539) > (skb->len + 16) && (hp100_inb(TX_PKT_CNT) < 255))) {
1663 #ifdef HP100_DEBUG
1664                 printk("hp100: %s: start_xmit: tx free mem = 0x%x\n", dev->name, i);
1665 #endif
1666                 /* not waited long enough since last failed tx try? */
1667                 if (time_before(jiffies, dev_trans_start(dev) + HZ)) {
1668 #ifdef HP100_DEBUG
1669                         printk("hp100: %s: trans_start timing problem\n",
1670                                dev->name);
1671 #endif
1672                         goto drop;
1673                 }
1674                 if (lp->lan_type == HP100_LAN_100 && lp->hub_status < 0) {
1675                         /* we have a 100Mb/s adapter but it isn't connected to hub */
1676                         printk("hp100: %s: login to 100Mb/s hub retry\n", dev->name);
1677                         hp100_stop_interface(dev);
1678                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1679                         hp100_start_interface(dev);
1680                 } else {
1681                         spin_lock_irqsave(&lp->lock, flags);
1682                         hp100_ints_off();       /* Useful ? Jean II */
1683                         i = hp100_sense_lan(dev);
1684                         hp100_ints_on();
1685                         spin_unlock_irqrestore(&lp->lock, flags);
1686                         if (i == HP100_LAN_ERR)
1687                                 printk("hp100: %s: link down detected\n", dev->name);
1688                         else if (lp->lan_type != i) {   /* cable change! */
1689                                 /* it's very hard - all network setting must be changed!!! */
1690                                 printk("hp100: %s: cable change 10Mb/s <-> 100Mb/s detected\n", dev->name);
1691                                 lp->lan_type = i;
1692                                 hp100_stop_interface(dev);
1693                                 if (lp->lan_type == HP100_LAN_100)
1694                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1695                                 hp100_start_interface(dev);
1696                         } else {
1697                                 printk("hp100: %s: interface reset\n", dev->name);
1698                                 hp100_stop_interface(dev);
1699                                 if (lp->lan_type == HP100_LAN_100)
1700                                         lp->hub_status = hp100_login_to_vg_hub(dev, 0);
1701                                 hp100_start_interface(dev);
1702                                 mdelay(1);
1703                         }
1704                 }
1705                 goto drop;
1706         }
1707 
1708         for (i = 0; i < 6000 && (hp100_inb(OPTION_MSW) & HP100_TX_CMD); i++) {
1709 #ifdef HP100_DEBUG_TX
1710                 printk("hp100: %s: start_xmit: busy\n", dev->name);
1711 #endif
1712         }
1713 
1714         spin_lock_irqsave(&lp->lock, flags);
1715         hp100_ints_off();
1716         val = hp100_inw(IRQ_STATUS);
1717         /* Ack / clear the interrupt TX_COMPLETE interrupt - this interrupt is set
1718          * when the current packet being transmitted on the wire is completed. */
1719         hp100_outw(HP100_TX_COMPLETE, IRQ_STATUS);
1720 #ifdef HP100_DEBUG_TX
1721         printk("hp100: %s: start_xmit: irq_status=0x%.4x, irqmask=0x%.4x, len=%d\n",
1722                         dev->name, val, hp100_inw(IRQ_MASK), (int) skb->len);
1723 #endif
1724 
1725         ok_flag = skb->len >= HP100_MIN_PACKET_SIZE;
1726         i = ok_flag ? skb->len : HP100_MIN_PACKET_SIZE;
1727 
1728         hp100_outw(i, DATA32);  /* tell card the total packet length */
1729         hp100_outw(i, FRAGMENT_LEN);    /* and first/only fragment length    */
1730 
1731         if (lp->mode == 2) {    /* memory mapped */
1732                 /* Note: The J2585B needs alignment to 32bits here!  */
1733                 memcpy_toio(lp->mem_ptr_virt, skb->data, (skb->len + 3) & ~3);
1734                 if (!ok_flag)
1735                         memset_io(lp->mem_ptr_virt, 0, HP100_MIN_PACKET_SIZE - skb->len);
1736         } else {                /* programmed i/o */
1737                 outsl(ioaddr + HP100_REG_DATA32, skb->data,
1738                       (skb->len + 3) >> 2);
1739                 if (!ok_flag)
1740                         for (i = (skb->len + 3) & ~3; i < HP100_MIN_PACKET_SIZE; i += 4)
1741                                 hp100_outl(0, DATA32);
1742         }
1743 
1744         hp100_outb(HP100_TX_CMD | HP100_SET_LB, OPTION_MSW);    /* send packet */
1745 
1746         dev->stats.tx_packets++;
1747         dev->stats.tx_bytes += skb->len;
1748         hp100_ints_on();
1749         spin_unlock_irqrestore(&lp->lock, flags);
1750 
1751         dev_consume_skb_any(skb);
1752 
1753 #ifdef HP100_DEBUG_TX
1754         printk("hp100: %s: start_xmit: end\n", dev->name);
1755 #endif
1756 
1757         return NETDEV_TX_OK;
1758 
1759 drop:
1760         dev_kfree_skb(skb);
1761         return NETDEV_TX_OK;
1762 
1763 }
1764 
1765 
1766 /*
1767  * Receive Function (Non-Busmaster mode)
1768  * Called when an "Receive Packet" interrupt occurs, i.e. the receive
1769  * packet counter is non-zero.
1770  * For non-busmaster, this function does the whole work of transferring
1771  * the packet to the host memory and then up to higher layers via skb
1772  * and netif_rx.
1773  */
1774 
1775 static void hp100_rx(struct net_device *dev)
1776 {
1777         int packets, pkt_len;
1778         int ioaddr = dev->base_addr;
1779         struct hp100_private *lp = netdev_priv(dev);
1780         u_int header;
1781         struct sk_buff *skb;
1782 
1783 #ifdef DEBUG_B
1784         hp100_outw(0x4213, TRACE);
1785         printk("hp100: %s: rx\n", dev->name);
1786 #endif
1787 
1788         /* First get indication of received lan packet */
1789         /* RX_PKT_CND indicates the number of packets which have been fully */
1790         /* received onto the card but have not been fully transferred of the card */
1791         packets = hp100_inb(RX_PKT_CNT);
1792 #ifdef HP100_DEBUG_RX
1793         if (packets > 1)
1794                 printk("hp100: %s: rx: waiting packets = %d\n", dev->name, packets);
1795 #endif
1796 
1797         while (packets-- > 0) {
1798                 /* If ADV_NXT_PKT is still set, we have to wait until the card has */
1799                 /* really advanced to the next packet. */
1800                 for (pkt_len = 0; pkt_len < 6000 && (hp100_inb(OPTION_MSW) & HP100_ADV_NXT_PKT); pkt_len++) {
1801 #ifdef HP100_DEBUG_RX
1802                         printk ("hp100: %s: rx: busy, remaining packets = %d\n", dev->name, packets);
1803 #endif
1804                 }
1805 
1806                 /* First we get the header, which contains information about the */
1807                 /* actual length of the received packet. */
1808                 if (lp->mode == 2) {    /* memory mapped mode */
1809                         header = readl(lp->mem_ptr_virt);
1810                 } else          /* programmed i/o */
1811                         header = hp100_inl(DATA32);
1812 
1813                 pkt_len = ((header & HP100_PKT_LEN_MASK) + 3) & ~3;
1814 
1815 #ifdef HP100_DEBUG_RX
1816                 printk("hp100: %s: rx: new packet - length=%d, errors=0x%x, dest=0x%x\n",
1817                                      dev->name, header & HP100_PKT_LEN_MASK,
1818                                      (header >> 16) & 0xfff8, (header >> 16) & 7);
1819 #endif
1820 
1821                 /* Now we allocate the skb and transfer the data into it. */
1822                 skb = netdev_alloc_skb(dev, pkt_len + 2);
1823                 if (skb == NULL) {      /* Not enough memory->drop packet */
1824 #ifdef HP100_DEBUG
1825                         printk("hp100: %s: rx: couldn't allocate a sk_buff of size %d\n",
1826                                              dev->name, pkt_len);
1827 #endif
1828                         dev->stats.rx_dropped++;
1829                 } else {        /* skb successfully allocated */
1830 
1831                         u_char *ptr;
1832 
1833                         skb_reserve(skb,2);
1834 
1835                         /* ptr to start of the sk_buff data area */
1836                         skb_put(skb, pkt_len);
1837                         ptr = skb->data;
1838 
1839                         /* Now transfer the data from the card into that area */
1840                         if (lp->mode == 2)
1841                                 memcpy_fromio(ptr, lp->mem_ptr_virt,pkt_len);
1842                         else    /* io mapped */
1843                                 insl(ioaddr + HP100_REG_DATA32, ptr, pkt_len >> 2);
1844 
1845                         skb->protocol = eth_type_trans(skb, dev);
1846 
1847 #ifdef HP100_DEBUG_RX
1848                         printk("hp100: %s: rx: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1849                                         dev->name, ptr[0], ptr[1], ptr[2], ptr[3],
1850                                         ptr[4], ptr[5], ptr[6], ptr[7], ptr[8],
1851                                         ptr[9], ptr[10], ptr[11]);
1852 #endif
1853                         netif_rx(skb);
1854                         dev->stats.rx_packets++;
1855                         dev->stats.rx_bytes += pkt_len;
1856                 }
1857 
1858                 /* Indicate the card that we have got the packet */
1859                 hp100_outb(HP100_ADV_NXT_PKT | HP100_SET_LB, OPTION_MSW);
1860 
1861                 switch (header & 0x00070000) {
1862                 case (HP100_MULTI_ADDR_HASH << 16):
1863                 case (HP100_MULTI_ADDR_NO_HASH << 16):
1864                         dev->stats.multicast++;
1865                         break;
1866                 }
1867         }                       /* end of while(there are packets) loop */
1868 #ifdef HP100_DEBUG_RX
1869         printk("hp100_rx: %s: end\n", dev->name);
1870 #endif
1871 }
1872 
1873 /*
1874  * Receive Function for Busmaster Mode
1875  */
1876 static void hp100_rx_bm(struct net_device *dev)
1877 {
1878         int ioaddr = dev->base_addr;
1879         struct hp100_private *lp = netdev_priv(dev);
1880         hp100_ring_t *ptr;
1881         u_int header;
1882         int pkt_len;
1883 
1884 #ifdef HP100_DEBUG_B
1885         hp100_outw(0x4214, TRACE);
1886         printk("hp100: %s: rx_bm\n", dev->name);
1887 #endif
1888 
1889 #ifdef HP100_DEBUG
1890         if (0 == lp->rxrcommit) {
1891                 printk("hp100: %s: rx_bm called although no PDLs were committed to adapter?\n", dev->name);
1892                 return;
1893         } else
1894                 /* RX_PKT_CNT states how many PDLs are currently formatted and available to
1895                  * the cards BM engine */
1896         if ((hp100_inw(RX_PKT_CNT) & 0x00ff) >= lp->rxrcommit) {
1897                 printk("hp100: %s: More packets received than committed? RX_PKT_CNT=0x%x, commit=0x%x\n",
1898                                      dev->name, hp100_inw(RX_PKT_CNT) & 0x00ff,
1899                                      lp->rxrcommit);
1900                 return;
1901         }
1902 #endif
1903 
1904         while ((lp->rxrcommit > hp100_inb(RX_PDL))) {
1905                 /*
1906                  * The packet was received into the pdl pointed to by lp->rxrhead (
1907                  * the oldest pdl in the ring
1908                  */
1909 
1910                 /* First we get the header, which contains information about the */
1911                 /* actual length of the received packet. */
1912 
1913                 ptr = lp->rxrhead;
1914 
1915                 header = *(ptr->pdl - 1);
1916                 pkt_len = (header & HP100_PKT_LEN_MASK);
1917 
1918                 /* Conversion to new PCI API : NOP */
1919                 pci_unmap_single(lp->pci_dev, (dma_addr_t) ptr->pdl[3], MAX_ETHER_SIZE, PCI_DMA_FROMDEVICE);
1920 
1921 #ifdef HP100_DEBUG_BM
1922                 printk("hp100: %s: rx_bm: header@0x%x=0x%x length=%d, errors=0x%x, dest=0x%x\n",
1923                                 dev->name, (u_int) (ptr->pdl - 1), (u_int) header,
1924                                 pkt_len, (header >> 16) & 0xfff8, (header >> 16) & 7);
1925                 printk("hp100: %s: RX_PDL_COUNT:0x%x TX_PDL_COUNT:0x%x, RX_PKT_CNT=0x%x PDH=0x%x, Data@0x%x len=0x%x\n",
1926                                 dev->name, hp100_inb(RX_PDL), hp100_inb(TX_PDL),
1927                                 hp100_inb(RX_PKT_CNT), (u_int) * (ptr->pdl),
1928                                 (u_int) * (ptr->pdl + 3), (u_int) * (ptr->pdl + 4));
1929 #endif
1930 
1931                 if ((pkt_len >= MIN_ETHER_SIZE) &&
1932                     (pkt_len <= MAX_ETHER_SIZE)) {
1933                         if (ptr->skb == NULL) {
1934                                 printk("hp100: %s: rx_bm: skb null\n", dev->name);
1935                                 /* can happen if we only allocated room for the pdh due to memory shortage. */
1936                                 dev->stats.rx_dropped++;
1937                         } else {
1938                                 skb_trim(ptr->skb, pkt_len);    /* Shorten it */
1939                                 ptr->skb->protocol =
1940                                     eth_type_trans(ptr->skb, dev);
1941 
1942                                 netif_rx(ptr->skb);     /* Up and away... */
1943 
1944                                 dev->stats.rx_packets++;
1945                                 dev->stats.rx_bytes += pkt_len;
1946                         }
1947 
1948                         switch (header & 0x00070000) {
1949                         case (HP100_MULTI_ADDR_HASH << 16):
1950                         case (HP100_MULTI_ADDR_NO_HASH << 16):
1951                                 dev->stats.multicast++;
1952                                 break;
1953                         }
1954                 } else {
1955 #ifdef HP100_DEBUG
1956                         printk("hp100: %s: rx_bm: Received bad packet (length=%d)\n", dev->name, pkt_len);
1957 #endif
1958                         if (ptr->skb != NULL)
1959                                 dev_kfree_skb_any(ptr->skb);
1960                         dev->stats.rx_errors++;
1961                 }
1962 
1963                 lp->rxrhead = lp->rxrhead->next;
1964 
1965                 /* Allocate a new rx PDL (so lp->rxrcommit stays the same) */
1966                 if (0 == hp100_build_rx_pdl(lp->rxrtail, dev)) {
1967                         /* No space for skb, header can still be received. */
1968 #ifdef HP100_DEBUG
1969                         printk("hp100: %s: rx_bm: No space for new PDL.\n", dev->name);
1970 #endif
1971                         return;
1972                 } else {        /* successfully allocated new PDL - put it in ringlist at tail. */
1973                         hp100_outl((u32) lp->rxrtail->pdl_paddr, RX_PDA);
1974                         lp->rxrtail = lp->rxrtail->next;
1975                 }
1976 
1977         }
1978 }
1979 
1980 /*
1981  *  statistics
1982  */
1983 static struct net_device_stats *hp100_get_stats(struct net_device *dev)
1984 {
1985         unsigned long flags;
1986         int ioaddr = dev->base_addr;
1987         struct hp100_private *lp = netdev_priv(dev);
1988 
1989 #ifdef HP100_DEBUG_B
1990         hp100_outw(0x4215, TRACE);
1991 #endif
1992 
1993         spin_lock_irqsave(&lp->lock, flags);
1994         hp100_ints_off();       /* Useful ? Jean II */
1995         hp100_update_stats(dev);
1996         hp100_ints_on();
1997         spin_unlock_irqrestore(&lp->lock, flags);
1998         return &(dev->stats);
1999 }
2000 
2001 static void hp100_update_stats(struct net_device *dev)
2002 {
2003         int ioaddr = dev->base_addr;
2004         u_short val;
2005 
2006 #ifdef HP100_DEBUG_B
2007         hp100_outw(0x4216, TRACE);
2008         printk("hp100: %s: update-stats\n", dev->name);
2009 #endif
2010 
2011         /* Note: Statistics counters clear when read. */
2012         hp100_page(MAC_CTRL);
2013         val = hp100_inw(DROPPED) & 0x0fff;
2014         dev->stats.rx_errors += val;
2015         dev->stats.rx_over_errors += val;
2016         val = hp100_inb(CRC);
2017         dev->stats.rx_errors += val;
2018         dev->stats.rx_crc_errors += val;
2019         val = hp100_inb(ABORT);
2020         dev->stats.tx_errors += val;
2021         dev->stats.tx_aborted_errors += val;
2022         hp100_page(PERFORMANCE);
2023 }
2024 
2025 static void hp100_misc_interrupt(struct net_device *dev)
2026 {
2027 #ifdef HP100_DEBUG_B
2028         int ioaddr = dev->base_addr;
2029 #endif
2030 
2031 #ifdef HP100_DEBUG_B
2032         int ioaddr = dev->base_addr;
2033         hp100_outw(0x4216, TRACE);
2034         printk("hp100: %s: misc_interrupt\n", dev->name);
2035 #endif
2036 
2037         /* Note: Statistics counters clear when read. */
2038         dev->stats.rx_errors++;
2039         dev->stats.tx_errors++;
2040 }
2041 
2042 static void hp100_clear_stats(struct hp100_private *lp, int ioaddr)
2043 {
2044         unsigned long flags;
2045 
2046 #ifdef HP100_DEBUG_B
2047         hp100_outw(0x4217, TRACE);
2048         printk("hp100: %s: clear_stats\n", dev->name);
2049 #endif
2050 
2051         spin_lock_irqsave(&lp->lock, flags);
2052         hp100_page(MAC_CTRL);   /* get all statistics bytes */
2053         hp100_inw(DROPPED);
2054         hp100_inb(CRC);
2055         hp100_inb(ABORT);
2056         hp100_page(PERFORMANCE);
2057         spin_unlock_irqrestore(&lp->lock, flags);
2058 }
2059 
2060 
2061 /*
2062  *  multicast setup
2063  */
2064 
2065 /*
2066  *  Set or clear the multicast filter for this adapter.
2067  */
2068 
2069 static void hp100_set_multicast_list(struct net_device *dev)
2070 {
2071         unsigned long flags;
2072         int ioaddr = dev->base_addr;
2073         struct hp100_private *lp = netdev_priv(dev);
2074 
2075 #ifdef HP100_DEBUG_B
2076         hp100_outw(0x4218, TRACE);
2077         printk("hp100: %s: set_mc_list\n", dev->name);
2078 #endif
2079 
2080         spin_lock_irqsave(&lp->lock, flags);
2081         hp100_ints_off();
2082         hp100_page(MAC_CTRL);
2083         hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);    /* stop rx/tx */
2084 
2085         if (dev->flags & IFF_PROMISC) {
2086                 lp->mac2_mode = HP100_MAC2MODE6;        /* promiscuous mode = get all good */
2087                 lp->mac1_mode = HP100_MAC1MODE6;        /* packets on the net */
2088                 memset(&lp->hash_bytes, 0xff, 8);
2089         } else if (!netdev_mc_empty(dev) || (dev->flags & IFF_ALLMULTI)) {
2090                 lp->mac2_mode = HP100_MAC2MODE5;        /* multicast mode = get packets for */
2091                 lp->mac1_mode = HP100_MAC1MODE5;        /* me, broadcasts and all multicasts */
2092 #ifdef HP100_MULTICAST_FILTER   /* doesn't work!!! */
2093                 if (dev->flags & IFF_ALLMULTI) {
2094                         /* set hash filter to receive all multicast packets */
2095                         memset(&lp->hash_bytes, 0xff, 8);
2096                 } else {
2097                         int i, idx;
2098                         u_char *addrs;
2099                         struct netdev_hw_addr *ha;
2100 
2101                         memset(&lp->hash_bytes, 0x00, 8);
2102 #ifdef HP100_DEBUG
2103                         printk("hp100: %s: computing hash filter - mc_count = %i\n",
2104                                dev->name, netdev_mc_count(dev));
2105 #endif
2106                         netdev_for_each_mc_addr(ha, dev) {
2107                                 addrs = ha->addr;
2108 #ifdef HP100_DEBUG
2109                                 printk("hp100: %s: multicast = %pM, ",
2110                                              dev->name, addrs);
2111 #endif
2112                                 for (i = idx = 0; i < 6; i++) {
2113                                         idx ^= *addrs++ & 0x3f;
2114                                         printk(":%02x:", idx);
2115                                 }
2116 #ifdef HP100_DEBUG
2117                                 printk("idx = %i\n", idx);
2118 #endif
2119                                 lp->hash_bytes[idx >> 3] |= (1 << (idx & 7));
2120                         }
2121                 }
2122 #else
2123                 memset(&lp->hash_bytes, 0xff, 8);
2124 #endif
2125         } else {
2126                 lp->mac2_mode = HP100_MAC2MODE3;        /* normal mode = get packets for me */
2127                 lp->mac1_mode = HP100_MAC1MODE3;        /* and broadcasts */
2128                 memset(&lp->hash_bytes, 0x00, 8);
2129         }
2130 
2131         if (((hp100_inb(MAC_CFG_1) & 0x0f) != lp->mac1_mode) ||
2132             (hp100_inb(MAC_CFG_2) != lp->mac2_mode)) {
2133                 int i;
2134 
2135                 hp100_outb(lp->mac2_mode, MAC_CFG_2);
2136                 hp100_andb(HP100_MAC1MODEMASK, MAC_CFG_1);      /* clear mac1 mode bits */
2137                 hp100_orb(lp->mac1_mode, MAC_CFG_1);    /* and set the new mode */
2138 
2139                 hp100_page(MAC_ADDRESS);
2140                 for (i = 0; i < 8; i++)
2141                         hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
2142 #ifdef HP100_DEBUG
2143                 printk("hp100: %s: mac1 = 0x%x, mac2 = 0x%x, multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
2144                                      dev->name, lp->mac1_mode, lp->mac2_mode,
2145                                      lp->hash_bytes[0], lp->hash_bytes[1],
2146                                      lp->hash_bytes[2], lp->hash_bytes[3],
2147                                      lp->hash_bytes[4], lp->hash_bytes[5],
2148                                      lp->hash_bytes[6], lp->hash_bytes[7]);
2149 #endif
2150 
2151                 if (lp->lan_type == HP100_LAN_100) {
2152 #ifdef HP100_DEBUG
2153                         printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
2154 #endif
2155                         lp->hub_status = hp100_login_to_vg_hub(dev, 1); /* force a relogin to the hub */
2156                 }
2157         } else {
2158                 int i;
2159                 u_char old_hash_bytes[8];
2160 
2161                 hp100_page(MAC_ADDRESS);
2162                 for (i = 0; i < 8; i++)
2163                         old_hash_bytes[i] = hp100_inb(HASH_BYTE0 + i);
2164                 if (memcmp(old_hash_bytes, &lp->hash_bytes, 8)) {
2165                         for (i = 0; i < 8; i++)
2166                                 hp100_outb(lp->hash_bytes[i], HASH_BYTE0 + i);
2167 #ifdef HP100_DEBUG
2168                         printk("hp100: %s: multicast hash = %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
2169                                         dev->name, lp->hash_bytes[0],
2170                                         lp->hash_bytes[1], lp->hash_bytes[2],
2171                                         lp->hash_bytes[3], lp->hash_bytes[4],
2172                                         lp->hash_bytes[5], lp->hash_bytes[6],
2173                                         lp->hash_bytes[7]);
2174 #endif
2175 
2176                         if (lp->lan_type == HP100_LAN_100) {
2177 #ifdef HP100_DEBUG
2178                                 printk("hp100: %s: 100VG MAC settings have changed - relogin.\n", dev->name);
2179 #endif
2180                                 lp->hub_status = hp100_login_to_vg_hub(dev, 1); /* force a relogin to the hub */
2181                         }
2182                 }
2183         }
2184 
2185         hp100_page(MAC_CTRL);
2186         hp100_orb(HP100_RX_EN | HP100_RX_IDLE | /* enable rx */
2187                   HP100_TX_EN | HP100_TX_IDLE, MAC_CFG_1);      /* enable tx */
2188 
2189         hp100_page(PERFORMANCE);
2190         hp100_ints_on();
2191         spin_unlock_irqrestore(&lp->lock, flags);
2192 }
2193 
2194 /*
2195  *  hardware interrupt handling
2196  */
2197 
2198 static irqreturn_t hp100_interrupt(int irq, void *dev_id)
2199 {
2200         struct net_device *dev = (struct net_device *) dev_id;
2201         struct hp100_private *lp = netdev_priv(dev);
2202 
2203         int ioaddr;
2204         u_int val;
2205 
2206         if (dev == NULL)
2207                 return IRQ_NONE;
2208         ioaddr = dev->base_addr;
2209 
2210         spin_lock(&lp->lock);
2211 
2212         hp100_ints_off();
2213 
2214 #ifdef HP100_DEBUG_B
2215         hp100_outw(0x4219, TRACE);
2216 #endif
2217 
2218         /*  hp100_page( PERFORMANCE ); */
2219         val = hp100_inw(IRQ_STATUS);
2220 #ifdef HP100_DEBUG_IRQ
2221         printk("hp100: %s: mode=%x,IRQ_STAT=0x%.4x,RXPKTCNT=0x%.2x RXPDL=0x%.2x TXPKTCNT=0x%.2x TXPDL=0x%.2x\n",
2222                              dev->name, lp->mode, (u_int) val, hp100_inb(RX_PKT_CNT),
2223                              hp100_inb(RX_PDL), hp100_inb(TX_PKT_CNT), hp100_inb(TX_PDL));
2224 #endif
2225 
2226         if (val == 0) {         /* might be a shared interrupt */
2227                 spin_unlock(&lp->lock);
2228                 hp100_ints_on();
2229                 return IRQ_NONE;
2230         }
2231         /* We're only interested in those interrupts we really enabled. */
2232         /* val &= hp100_inw( IRQ_MASK ); */
2233 
2234         /*
2235          * RX_PDL_FILL_COMPL is set whenever a RX_PDL has been executed. A RX_PDL
2236          * is considered executed whenever the RX_PDL data structure is no longer
2237          * needed.
2238          */
2239         if (val & HP100_RX_PDL_FILL_COMPL) {
2240                 if (lp->mode == 1)
2241                         hp100_rx_bm(dev);
2242                 else {
2243                         printk("hp100: %s: rx_pdl_fill_compl interrupt although not busmaster?\n", dev->name);
2244                 }
2245         }
2246 
2247         /*
2248          * The RX_PACKET interrupt is set, when the receive packet counter is
2249          * non zero. We use this interrupt for receiving in slave mode. In
2250          * busmaster mode, we use it to make sure we did not miss any rx_pdl_fill
2251          * interrupts. If rx_pdl_fill_compl is not set and rx_packet is set, then
2252          * we somehow have missed a rx_pdl_fill_compl interrupt.
2253          */
2254 
2255         if (val & HP100_RX_PACKET) {    /* Receive Packet Counter is non zero */
2256                 if (lp->mode != 1)      /* non busmaster */
2257                         hp100_rx(dev);
2258                 else if (!(val & HP100_RX_PDL_FILL_COMPL)) {
2259                         /* Shouldn't happen - maybe we missed a RX_PDL_FILL Interrupt?  */
2260                         hp100_rx_bm(dev);
2261                 }
2262         }
2263 
2264         /*
2265          * Ack. that we have noticed the interrupt and thereby allow next one.
2266          * Note that this is now done after the slave rx function, since first
2267          * acknowledging and then setting ADV_NXT_PKT caused an extra interrupt
2268          * on the J2573.
2269          */
2270         hp100_outw(val, IRQ_STATUS);
2271 
2272         /*
2273          * RX_ERROR is set when a packet is dropped due to no memory resources on
2274          * the card or when a RCV_ERR occurs.
2275          * TX_ERROR is set when a TX_ABORT condition occurs in the MAC->exists
2276          * only in the 802.3 MAC and happens when 16 collisions occur during a TX
2277          */
2278         if (val & (HP100_TX_ERROR | HP100_RX_ERROR)) {
2279 #ifdef HP100_DEBUG_IRQ
2280                 printk("hp100: %s: TX/RX Error IRQ\n", dev->name);
2281 #endif
2282                 hp100_update_stats(dev);
2283                 if (lp->mode == 1) {
2284                         hp100_rxfill(dev);
2285                         hp100_clean_txring(dev);
2286                 }
2287         }
2288 
2289         /*
2290          * RX_PDA_ZERO is set when the PDA count goes from non-zero to zero.
2291          */
2292         if ((lp->mode == 1) && (val & (HP100_RX_PDA_ZERO)))
2293                 hp100_rxfill(dev);
2294 
2295         /*
2296          * HP100_TX_COMPLETE interrupt occurs when packet transmitted on wire
2297          * is completed
2298          */
2299         if ((lp->mode == 1) && (val & (HP100_TX_COMPLETE)))
2300                 hp100_clean_txring(dev);
2301 
2302         /*
2303          * MISC_ERROR is set when either the LAN link goes down or a detected
2304          * bus error occurs.
2305          */
2306         if (val & HP100_MISC_ERROR) {   /* New for J2585B */
2307 #ifdef HP100_DEBUG_IRQ
2308                 printk
2309                     ("hp100: %s: Misc. Error Interrupt - Check cabling.\n",
2310                      dev->name);
2311 #endif
2312                 if (lp->mode == 1) {
2313                         hp100_clean_txring(dev);
2314                         hp100_rxfill(dev);
2315                 }
2316                 hp100_misc_interrupt(dev);
2317         }
2318 
2319         spin_unlock(&lp->lock);
2320         hp100_ints_on();
2321         return IRQ_HANDLED;
2322 }
2323 
2324 /*
2325  *  some misc functions
2326  */
2327 
2328 static void hp100_start_interface(struct net_device *dev)
2329 {
2330         unsigned long flags;
2331         int ioaddr = dev->base_addr;
2332         struct hp100_private *lp = netdev_priv(dev);
2333 
2334 #ifdef HP100_DEBUG_B
2335         hp100_outw(0x4220, TRACE);
2336         printk("hp100: %s: hp100_start_interface\n", dev->name);
2337 #endif
2338 
2339         spin_lock_irqsave(&lp->lock, flags);
2340 
2341         /* Ensure the adapter does not want to request an interrupt when */
2342         /* enabling the IRQ line to be active on the bus (i.e. not tri-stated) */
2343         hp100_page(PERFORMANCE);
2344         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
2345         hp100_outw(0xffff, IRQ_STATUS); /* ack all IRQs */
2346         hp100_outw(HP100_FAKE_INT | HP100_INT_EN | HP100_RESET_LB,
2347                    OPTION_LSW);
2348         /* Un Tri-state int. TODO: Check if shared interrupts can be realised? */
2349         hp100_outw(HP100_TRI_INT | HP100_RESET_HB, OPTION_LSW);
2350 
2351         if (lp->mode == 1) {
2352                 /* Make sure BM bit is set... */
2353                 hp100_page(HW_MAP);
2354                 hp100_orb(HP100_BM_MASTER, BM);
2355                 hp100_rxfill(dev);
2356         } else if (lp->mode == 2) {
2357                 /* Enable memory mapping. Note: Don't do this when busmaster. */
2358                 hp100_outw(HP100_MMAP_DIS | HP100_RESET_HB, OPTION_LSW);
2359         }
2360 
2361         hp100_page(PERFORMANCE);
2362         hp100_outw(0xfefe, IRQ_MASK);   /* mask off all ints */
2363         hp100_outw(0xffff, IRQ_STATUS); /* ack IRQ */
2364 
2365         /* enable a few interrupts: */
2366         if (lp->mode == 1) {    /* busmaster mode */
2367                 hp100_outw(HP100_RX_PDL_FILL_COMPL |
2368                            HP100_RX_PDA_ZERO | HP100_RX_ERROR |
2369                            /* HP100_RX_PACKET    | */
2370                            /* HP100_RX_EARLY_INT |  */ HP100_SET_HB |
2371                            /* HP100_TX_PDA_ZERO  |  */
2372                            HP100_TX_COMPLETE |
2373                            /* HP100_MISC_ERROR   |  */
2374                            HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
2375         } else {
2376                 hp100_outw(HP100_RX_PACKET |
2377                            HP100_RX_ERROR | HP100_SET_HB |
2378                            HP100_TX_ERROR | HP100_SET_LB, IRQ_MASK);
2379         }
2380 
2381         /* Note : before hp100_set_multicast_list(), because it will play with
2382          * spinlock itself... Jean II */
2383         spin_unlock_irqrestore(&lp->lock, flags);
2384 
2385         /* Enable MAC Tx and RX, set MAC modes, ... */
2386         hp100_set_multicast_list(dev);
2387 }
2388 
2389 static void hp100_stop_interface(struct net_device *dev)
2390 {
2391         struct hp100_private *lp = netdev_priv(dev);
2392         int ioaddr = dev->base_addr;
2393         u_int val;
2394 
2395 #ifdef HP100_DEBUG_B
2396         printk("hp100: %s: hp100_stop_interface\n", dev->name);
2397         hp100_outw(0x4221, TRACE);
2398 #endif
2399 
2400         if (lp->mode == 1)
2401                 hp100_BM_shutdown(dev);
2402         else {
2403                 /* Note: MMAP_DIS will be reenabled by start_interface */
2404                 hp100_outw(HP100_INT_EN | HP100_RESET_LB |
2405                            HP100_TRI_INT | HP100_MMAP_DIS | HP100_SET_HB,
2406                            OPTION_LSW);
2407                 val = hp100_inw(OPTION_LSW);
2408 
2409                 hp100_page(MAC_CTRL);
2410                 hp100_andb(~(HP100_RX_EN | HP100_TX_EN), MAC_CFG_1);
2411 
2412                 if (!(val & HP100_HW_RST))
2413                         return; /* If reset, imm. return ... */
2414                 /* ... else: busy wait until idle */
2415                 for (val = 0; val < 6000; val++)
2416                         if ((hp100_inb(MAC_CFG_1) & (HP100_TX_IDLE | HP100_RX_IDLE)) == (HP100_TX_IDLE | HP100_RX_IDLE)) {
2417                                 hp100_page(PERFORMANCE);
2418                                 return;
2419                         }
2420                 printk("hp100: %s: hp100_stop_interface - timeout\n", dev->name);
2421                 hp100_page(PERFORMANCE);
2422         }
2423 }
2424 
2425 static void hp100_load_eeprom(struct net_device *dev, u_short probe_ioaddr)
2426 {
2427         int i;
2428         int ioaddr = probe_ioaddr > 0 ? probe_ioaddr : dev->base_addr;
2429 
2430 #ifdef HP100_DEBUG_B
2431         hp100_outw(0x4222, TRACE);
2432 #endif
2433 
2434         hp100_page(EEPROM_CTRL);
2435         hp100_andw(~HP100_EEPROM_LOAD, EEPROM_CTRL);
2436         hp100_orw(HP100_EEPROM_LOAD, EEPROM_CTRL);
2437         for (i = 0; i < 10000; i++)
2438                 if (!(hp100_inb(OPTION_MSW) & HP100_EE_LOAD))
2439                         return;
2440         printk("hp100: %s: hp100_load_eeprom - timeout\n", dev->name);
2441 }
2442 
2443 /*  Sense connection status.
2444  *  return values: LAN_10  - Connected to 10Mbit/s network
2445  *                 LAN_100 - Connected to 100Mbit/s network
2446  *                 LAN_ERR - not connected or 100Mbit/s Hub down
2447  */
2448 static int hp100_sense_lan(struct net_device *dev)
2449 {
2450         int ioaddr = dev->base_addr;
2451         u_short val_VG, val_10;
2452         struct hp100_private *lp = netdev_priv(dev);
2453 
2454 #ifdef HP100_DEBUG_B
2455         hp100_outw(0x4223, TRACE);
2456 #endif
2457 
2458         hp100_page(MAC_CTRL);
2459         val_10 = hp100_inb(10_LAN_CFG_1);
2460         val_VG = hp100_inb(VG_LAN_CFG_1);
2461         hp100_page(PERFORMANCE);
2462 #ifdef HP100_DEBUG
2463         printk("hp100: %s: sense_lan: val_VG = 0x%04x, val_10 = 0x%04x\n",
2464                dev->name, val_VG, val_10);
2465 #endif
2466 
2467         if (val_10 & HP100_LINK_BEAT_ST)        /* 10Mb connection is active */
2468                 return HP100_LAN_10;
2469 
2470         if (val_10 & HP100_AUI_ST) {    /* have we BNC or AUI onboard? */
2471                 /*
2472                  * This can be overriden by dos utility, so if this has no effect,
2473                  * perhaps you need to download that utility from HP and set card
2474                  * back to "auto detect".
2475                  */
2476                 val_10 |= HP100_AUI_SEL | HP100_LOW_TH;
2477                 hp100_page(MAC_CTRL);
2478                 hp100_outb(val_10, 10_LAN_CFG_1);
2479                 hp100_page(PERFORMANCE);
2480                 return HP100_LAN_COAX;
2481         }
2482 
2483         /* Those cards don't have a 100 Mbit connector */
2484         if ( !strcmp(lp->id, "HWP1920")  ||
2485              (lp->pci_dev &&
2486               lp->pci_dev->vendor == PCI_VENDOR_ID &&
2487               (lp->pci_dev->device == PCI_DEVICE_ID_HP_J2970A ||
2488                lp->pci_dev->device == PCI_DEVICE_ID_HP_J2973A)))
2489                 return HP100_LAN_ERR;
2490 
2491         if (val_VG & HP100_LINK_CABLE_ST)       /* Can hear the HUBs tone. */
2492                 return HP100_LAN_100;
2493         return HP100_LAN_ERR;
2494 }
2495 
2496 static int hp100_down_vg_link(struct net_device *dev)
2497 {
2498         struct hp100_private *lp = netdev_priv(dev);
2499         int ioaddr = dev->base_addr;
2500         unsigned long time;
2501         long savelan, newlan;
2502 
2503 #ifdef HP100_DEBUG_B
2504         hp100_outw(0x4224, TRACE);
2505         printk("hp100: %s: down_vg_link\n", dev->name);
2506 #endif
2507 
2508         hp100_page(MAC_CTRL);
2509         time = jiffies + (HZ / 4);
2510         do {
2511                 if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
2512                         break;
2513                 if (!in_interrupt())
2514                         schedule_timeout_interruptible(1);
2515         } while (time_after(time, jiffies));
2516 
2517         if (time_after_eq(jiffies, time))       /* no signal->no logout */
2518                 return 0;
2519 
2520         /* Drop the VG Link by clearing the link up cmd and load addr. */
2521 
2522         hp100_andb(~(HP100_LOAD_ADDR | HP100_LINK_CMD), VG_LAN_CFG_1);
2523         hp100_orb(HP100_VG_SEL, VG_LAN_CFG_1);
2524 
2525         /* Conditionally stall for >250ms on Link-Up Status (to go down) */
2526         time = jiffies + (HZ / 2);
2527         do {
2528                 if (!(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
2529                         break;
2530                 if (!in_interrupt())
2531                         schedule_timeout_interruptible(1);
2532         } while (time_after(time, jiffies));
2533 
2534 #ifdef HP100_DEBUG
2535         if (time_after_eq(jiffies, time))
2536                 printk("hp100: %s: down_vg_link: Link does not go down?\n", dev->name);
2537 #endif
2538 
2539         /* To prevent condition where Rev 1 VG MAC and old hubs do not complete */
2540         /* logout under traffic (even though all the status bits are cleared),  */
2541         /* do this workaround to get the Rev 1 MAC in its idle state */
2542         if (lp->chip == HP100_CHIPID_LASSEN) {
2543                 /* Reset VG MAC to insure it leaves the logoff state even if */
2544                 /* the Hub is still emitting tones */
2545                 hp100_andb(~HP100_VG_RESET, VG_LAN_CFG_1);
2546                 udelay(1500);   /* wait for >1ms */
2547                 hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);        /* Release Reset */
2548                 udelay(1500);
2549         }
2550 
2551         /* New: For lassen, switch to 10 Mbps mac briefly to clear training ACK */
2552         /* to get the VG mac to full reset. This is not req.d with later chips */
2553         /* Note: It will take the between 1 and 2 seconds for the VG mac to be */
2554         /* selected again! This will be left to the connect hub function to */
2555         /* perform if desired.  */
2556         if (lp->chip == HP100_CHIPID_LASSEN) {
2557                 /* Have to write to 10 and 100VG control registers simultaneously */
2558                 savelan = newlan = hp100_inl(10_LAN_CFG_1);     /* read 10+100 LAN_CFG regs */
2559                 newlan &= ~(HP100_VG_SEL << 16);
2560                 newlan |= (HP100_DOT3_MAC) << 8;
2561                 hp100_andb(~HP100_AUTO_MODE, MAC_CFG_3);        /* Autosel off */
2562                 hp100_outl(newlan, 10_LAN_CFG_1);
2563 
2564                 /* Conditionally stall for 5sec on VG selected. */
2565                 time = jiffies + (HZ * 5);
2566                 do {
2567                         if (!(hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST))
2568                                 break;
2569                         if (!in_interrupt())
2570                                 schedule_timeout_interruptible(1);
2571                 } while (time_after(time, jiffies));
2572 
2573                 hp100_orb(HP100_AUTO_MODE, MAC_CFG_3);  /* Autosel back on */
2574                 hp100_outl(savelan, 10_LAN_CFG_1);
2575         }
2576 
2577         time = jiffies + (3 * HZ);      /* Timeout 3s */
2578         do {
2579                 if ((hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST) == 0)
2580                         break;
2581                 if (!in_interrupt())
2582                         schedule_timeout_interruptible(1);
2583         } while (time_after(time, jiffies));
2584 
2585         if (time_before_eq(time, jiffies)) {
2586 #ifdef HP100_DEBUG
2587                 printk("hp100: %s: down_vg_link: timeout\n", dev->name);
2588 #endif
2589                 return -EIO;
2590         }
2591 
2592         time = jiffies + (2 * HZ);      /* This seems to take a while.... */
2593         do {
2594                 if (!in_interrupt())
2595                         schedule_timeout_interruptible(1);
2596         } while (time_after(time, jiffies));
2597 
2598         return 0;
2599 }
2600 
2601 static int hp100_login_to_vg_hub(struct net_device *dev, u_short force_relogin)
2602 {
2603         int ioaddr = dev->base_addr;
2604         struct hp100_private *lp = netdev_priv(dev);
2605         u_short val = 0;
2606         unsigned long time;
2607         int startst;
2608 
2609 #ifdef HP100_DEBUG_B
2610         hp100_outw(0x4225, TRACE);
2611         printk("hp100: %s: login_to_vg_hub\n", dev->name);
2612 #endif
2613 
2614         /* Initiate a login sequence iff VG MAC is enabled and either Load Address
2615          * bit is zero or the force relogin flag is set (e.g. due to MAC address or
2616          * promiscuous mode change)
2617          */
2618         hp100_page(MAC_CTRL);
2619         startst = hp100_inb(VG_LAN_CFG_1);
2620         if ((force_relogin == 1) || (hp100_inb(MAC_CFG_4) & HP100_MAC_SEL_ST)) {
2621 #ifdef HP100_DEBUG_TRAINING
2622                 printk("hp100: %s: Start training\n", dev->name);
2623 #endif
2624 
2625                 /* Ensure VG Reset bit is 1 (i.e., do not reset) */
2626                 hp100_orb(HP100_VG_RESET, VG_LAN_CFG_1);
2627 
2628                 /* If Lassen AND auto-select-mode AND VG tones were sensed on */
2629                 /* entry then temporarily put them into force 100Mbit mode */
2630                 if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST))
2631                         hp100_andb(~HP100_DOT3_MAC, 10_LAN_CFG_2);
2632 
2633                 /* Drop the VG link by zeroing Link Up Command and Load Address  */
2634                 hp100_andb(~(HP100_LINK_CMD /* |HP100_LOAD_ADDR */ ), VG_LAN_CFG_1);
2635 
2636 #ifdef HP100_DEBUG_TRAINING
2637                 printk("hp100: %s: Bring down the link\n", dev->name);
2638 #endif
2639 
2640                 /* Wait for link to drop */
2641                 time = jiffies + (HZ / 10);
2642                 do {
2643                         if (~(hp100_inb(VG_LAN_CFG_1) & HP100_LINK_UP_ST))
2644                                 break;
2645                         if (!in_interrupt())
2646                                 schedule_timeout_interruptible(1);
2647                 } while (time_after(time, jiffies));
2648 
2649                 /* Start an addressed training and optionally request promiscuous port */
2650                 if ((dev->flags) & IFF_PROMISC) {
2651                         hp100_orb(HP100_PROM_MODE, VG_LAN_CFG_2);
2652                         if (lp->chip == HP100_CHIPID_LASSEN)
2653                                 hp100_orw(HP100_MACRQ_PROMSC, TRAIN_REQUEST);
2654                 } else {
2655                         hp100_andb(~HP100_PROM_MODE, VG_LAN_CFG_2);
2656                         /* For ETR parts we need to reset the prom. bit in the training
2657                          * register, otherwise promiscious mode won't be disabled.
2658                          */
2659                         if (lp->chip == HP100_CHIPID_LASSEN) {
2660                                 hp100_andw(~HP100_MACRQ_PROMSC, TRAIN_REQUEST);
2661                         }
2662                 }
2663 
2664                 /* With ETR parts, frame format request bits can be set. */
2665                 if (lp->chip == HP100_CHIPID_LASSEN)
2666                         hp100_orb(HP100_MACRQ_FRAMEFMT_EITHER, TRAIN_REQUEST);
2667 
2668                 hp100_orb(HP100_LINK_CMD | HP100_LOAD_ADDR | HP100_VG_RESET, VG_LAN_CFG_1);
2669 
2670                 /* Note: Next wait could be omitted for Hood and earlier chips under */
2671                 /* certain circumstances */
2672                 /* TODO: check if hood/earlier and skip wait. */
2673 
2674                 /* Wait for either short timeout for VG tones or long for login    */
2675                 /* Wait for the card hardware to signalise link cable status ok... */
2676                 hp100_page(MAC_CTRL);
2677                 time = jiffies + (1 * HZ);      /* 1 sec timeout for cable st */
2678                 do {
2679                         if (hp100_inb(VG_LAN_CFG_1) & HP100_LINK_CABLE_ST)
2680                                 break;
2681                         if (!in_interrupt())
2682                                 schedule_timeout_interruptible(1);
2683                 } while (time_before(jiffies, time));
2684 
2685                 if (time_after_eq(jiffies, time)) {
2686 #ifdef HP100_DEBUG_TRAINING
2687                         printk("hp100: %s: Link cable status not ok? Training aborted.\n", dev->name);
2688 #endif
2689                 } else {
2690 #ifdef HP100_DEBUG_TRAINING
2691                         printk
2692                             ("hp100: %s: HUB tones detected. Trying to train.\n",
2693                              dev->name);
2694 #endif
2695 
2696                         time = jiffies + (2 * HZ);      /* again a timeout */
2697                         do {
2698                                 val = hp100_inb(VG_LAN_CFG_1);
2699                                 if ((val & (HP100_LINK_UP_ST))) {
2700 #ifdef HP100_DEBUG_TRAINING
2701                                         printk("hp100: %s: Passed training.\n", dev->name);
2702 #endif
2703                                         break;
2704                                 }
2705                                 if (!in_interrupt())
2706                                         schedule_timeout_interruptible(1);
2707                         } while (time_after(time, jiffies));
2708                 }
2709 
2710                 /* If LINK_UP_ST is set, then we are logged into the hub. */
2711                 if (time_before_eq(jiffies, time) && (val & HP100_LINK_UP_ST)) {
2712 #ifdef HP100_DEBUG_TRAINING
2713                         printk("hp100: %s: Successfully logged into the HUB.\n", dev->name);
2714                         if (lp->chip == HP100_CHIPID_LASSEN) {
2715                                 val = hp100_inw(TRAIN_ALLOW);
2716                                 printk("hp100: %s: Card supports 100VG MAC Version \"%s\" ",
2717                                              dev->name, (hp100_inw(TRAIN_REQUEST) & HP100_CARD_MACVER) ? "802.12" : "Pre");
2718                                 printk("Driver will use MAC Version \"%s\"\n", (val & HP100_HUB_MACVER) ? "802.12" : "Pre");
2719                                 printk("hp100: %s: Frame format is %s.\n", dev->name, (val & HP100_MALLOW_FRAMEFMT) ? "802.5" : "802.3");
2720                         }
2721 #endif
2722                 } else {
2723                         /* If LINK_UP_ST is not set, login was not successful */
2724                         printk("hp100: %s: Problem logging into the HUB.\n", dev->name);
2725                         if (lp->chip == HP100_CHIPID_LASSEN) {
2726                                 /* Check allowed Register to find out why there is a problem. */
2727                                 val = hp100_inw(TRAIN_ALLOW);   /* won't work on non-ETR card */
2728 #ifdef HP100_DEBUG_TRAINING
2729                                 printk("hp100: %s: MAC Configuration requested: 0x%04x, HUB allowed: 0x%04x\n", dev->name, hp100_inw(TRAIN_REQUEST), val);
2730 #endif
2731                                 if (val & HP100_MALLOW_ACCDENIED)
2732                                         printk("hp100: %s: HUB access denied.\n", dev->name);
2733                                 if (val & HP100_MALLOW_CONFIGURE)
2734                                         printk("hp100: %s: MAC Configuration is incompatible with the Network.\n", dev->name);
2735                                 if (val & HP100_MALLOW_DUPADDR)
2736                                         printk("hp100: %s: Duplicate MAC Address on the Network.\n", dev->name);
2737                         }
2738                 }
2739 
2740                 /* If we have put the chip into forced 100 Mbit mode earlier, go back */
2741                 /* to auto-select mode */
2742 
2743                 if ((lp->chip == HP100_CHIPID_LASSEN) && (startst & HP100_LINK_CABLE_ST)) {
2744                         hp100_page(MAC_CTRL);
2745                         hp100_orb(HP100_DOT3_MAC, 10_LAN_CFG_2);
2746                 }
2747 
2748                 val = hp100_inb(VG_LAN_CFG_1);
2749 
2750                 /* Clear the MISC_ERROR Interrupt, which might be generated when doing the relogin */
2751                 hp100_page(PERFORMANCE);
2752                 hp100_outw(HP100_MISC_ERROR, IRQ_STATUS);
2753 
2754                 if (val & HP100_LINK_UP_ST)
2755                         return 0;       /* login was ok */
2756                 else {
2757                         printk("hp100: %s: Training failed.\n", dev->name);
2758                         hp100_down_vg_link(dev);
2759                         return -EIO;
2760                 }
2761         }
2762         /* no forced relogin & already link there->no training. */
2763         return -EIO;
2764 }
2765 
2766 static void hp100_cascade_reset(struct net_device *dev, u_short enable)
2767 {
2768         int ioaddr = dev->base_addr;
2769         struct hp100_private *lp = netdev_priv(dev);
2770 
2771 #ifdef HP100_DEBUG_B
2772         hp100_outw(0x4226, TRACE);
2773         printk("hp100: %s: cascade_reset\n", dev->name);
2774 #endif
2775 
2776         if (enable) {
2777                 hp100_outw(HP100_HW_RST | HP100_RESET_LB, OPTION_LSW);
2778                 if (lp->chip == HP100_CHIPID_LASSEN) {
2779                         /* Lassen requires a PCI transmit fifo reset */
2780                         hp100_page(HW_MAP);
2781                         hp100_andb(~HP100_PCI_RESET, PCICTRL2);
2782                         hp100_orb(HP100_PCI_RESET, PCICTRL2);
2783                         /* Wait for min. 300 ns */
2784                         /* we can't use jiffies here, because it may be */
2785                         /* that we have disabled the timer... */
2786                         udelay(400);
2787                         hp100_andb(~HP100_PCI_RESET, PCICTRL2);
2788                         hp100_page(PERFORMANCE);
2789                 }
2790         } else {                /* bring out of reset */
2791                 hp100_outw(HP100_HW_RST | HP100_SET_LB, OPTION_LSW);
2792                 udelay(400);
2793                 hp100_page(PERFORMANCE);
2794         }
2795 }
2796 
2797 #ifdef HP100_DEBUG
2798 void hp100_RegisterDump(struct net_device *dev)
2799 {
2800         int ioaddr = dev->base_addr;
2801         int Page;
2802         int Register;
2803 
2804         /* Dump common registers */
2805         printk("hp100: %s: Cascade Register Dump\n", dev->name);
2806         printk("hardware id #1: 0x%.2x\n", hp100_inb(HW_ID));
2807         printk("hardware id #2/paging: 0x%.2x\n", hp100_inb(PAGING));
2808         printk("option #1: 0x%.4x\n", hp100_inw(OPTION_LSW));
2809         printk("option #2: 0x%.4x\n", hp100_inw(OPTION_MSW));
2810 
2811         /* Dump paged registers */
2812         for (Page = 0; Page < 8; Page++) {
2813                 /* Dump registers */
2814                 printk("page: 0x%.2x\n", Page);
2815                 outw(Page, ioaddr + 0x02);
2816                 for (Register = 0x8; Register < 0x22; Register += 2) {
2817                         /* Display Register contents except data port */
2818                         if (((Register != 0x10) && (Register != 0x12)) || (Page > 0)) {
2819                                 printk("0x%.2x = 0x%.4x\n", Register, inw(ioaddr + Register));
2820                         }
2821                 }
2822         }
2823         hp100_page(PERFORMANCE);
2824 }
2825 #endif
2826 
2827 
2828 static void cleanup_dev(struct net_device *d)
2829 {
2830         struct hp100_private *p = netdev_priv(d);
2831 
2832         unregister_netdev(d);
2833         release_region(d->base_addr, HP100_REGION_SIZE);
2834 
2835         if (p->mode == 1)       /* busmaster */
2836                 pci_free_consistent(p->pci_dev, MAX_RINGSIZE + 0x0f,
2837                                     p->page_vaddr_algn,
2838                                     virt_to_whatever(d, p->page_vaddr_algn));
2839         if (p->mem_ptr_virt)
2840                 iounmap(p->mem_ptr_virt);
2841 
2842         free_netdev(d);
2843 }
2844 
2845 #ifdef CONFIG_EISA
2846 static int __init hp100_eisa_probe (struct device *gendev)
2847 {
2848         struct net_device *dev = alloc_etherdev(sizeof(struct hp100_private));
2849         struct eisa_device *edev = to_eisa_device(gendev);
2850         int err;
2851 
2852         if (!dev)
2853                 return -ENOMEM;
2854 
2855         SET_NETDEV_DEV(dev, &edev->dev);
2856 
2857         err = hp100_probe1(dev, edev->base_addr + 0xC38, HP100_BUS_EISA, NULL);
2858         if (err)
2859                 goto out1;
2860 
2861 #ifdef HP100_DEBUG
2862         printk("hp100: %s: EISA adapter found at 0x%x\n", dev->name,
2863                dev->base_addr);
2864 #endif
2865         dev_set_drvdata(gendev, dev);
2866         return 0;
2867  out1:
2868         free_netdev(dev);
2869         return err;
2870 }
2871 
2872 static int hp100_eisa_remove(struct device *gendev)
2873 {
2874         struct net_device *dev = dev_get_drvdata(gendev);
2875         cleanup_dev(dev);
2876         return 0;
2877 }
2878 
2879 static struct eisa_driver hp100_eisa_driver = {
2880         .id_table = hp100_eisa_tbl,
2881         .driver   = {
2882                 .name    = "hp100",
2883                 .probe   = hp100_eisa_probe,
2884                 .remove  = hp100_eisa_remove,
2885         }
2886 };
2887 #endif
2888 
2889 #ifdef CONFIG_PCI
2890 static int hp100_pci_probe(struct pci_dev *pdev,
2891                            const struct pci_device_id *ent)
2892 {
2893         struct net_device *dev;
2894         int ioaddr;
2895         u_short pci_command;
2896         int err;
2897 
2898         if (pci_enable_device(pdev))
2899                 return -ENODEV;
2900 
2901         dev = alloc_etherdev(sizeof(struct hp100_private));
2902         if (!dev) {
2903                 err = -ENOMEM;
2904                 goto out0;
2905         }
2906 
2907         SET_NETDEV_DEV(dev, &pdev->dev);
2908 
2909         pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
2910         if (!(pci_command & PCI_COMMAND_IO)) {
2911 #ifdef HP100_DEBUG
2912                 printk("hp100: %s: PCI I/O Bit has not been set. Setting...\n", dev->name);
2913 #endif
2914                 pci_command |= PCI_COMMAND_IO;
2915                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
2916         }
2917 
2918         if (!(pci_command & PCI_COMMAND_MASTER)) {
2919 #ifdef HP100_DEBUG
2920                 printk("hp100: %s: PCI Master Bit has not been set. Setting...\n", dev->name);
2921 #endif
2922                 pci_command |= PCI_COMMAND_MASTER;
2923                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
2924         }
2925 
2926         ioaddr = pci_resource_start(pdev, 0);
2927         err = hp100_probe1(dev, ioaddr, HP100_BUS_PCI, pdev);
2928         if (err)
2929                 goto out1;
2930 
2931 #ifdef HP100_DEBUG
2932         printk("hp100: %s: PCI adapter found at 0x%x\n", dev->name, ioaddr);
2933 #endif
2934         pci_set_drvdata(pdev, dev);
2935         return 0;
2936  out1:
2937         free_netdev(dev);
2938  out0:
2939         pci_disable_device(pdev);
2940         return err;
2941 }
2942 
2943 static void hp100_pci_remove(struct pci_dev *pdev)
2944 {
2945         struct net_device *dev = pci_get_drvdata(pdev);
2946 
2947         cleanup_dev(dev);
2948         pci_disable_device(pdev);
2949 }
2950 
2951 
2952 static struct pci_driver hp100_pci_driver = {
2953         .name           = "hp100",
2954         .id_table       = hp100_pci_tbl,
2955         .probe          = hp100_pci_probe,
2956         .remove         = hp100_pci_remove,
2957 };
2958 #endif
2959 
2960 /*
2961  *  module section
2962  */
2963 
2964 MODULE_LICENSE("GPL");
2965 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, "
2966               "Siegfried \"Frieder\" Loeffler (dg1sek) <floeff@mathematik.uni-stuttgart.de>");
2967 MODULE_DESCRIPTION("HP CASCADE Architecture Driver for 100VG-AnyLan Network Adapters");
2968 
2969 /*
2970  * Note: to register three isa devices, use:
2971  * option hp100 hp100_port=0,0,0
2972  *        to register one card at io 0x280 as eth239, use:
2973  * option hp100 hp100_port=0x280
2974  */
2975 #if defined(MODULE) && defined(CONFIG_ISA)
2976 #define HP100_DEVICES 5
2977 /* Parameters set by insmod */
2978 static int hp100_port[HP100_DEVICES] = { 0, [1 ... (HP100_DEVICES-1)] = -1 };
2979 module_param_array(hp100_port, int, NULL, 0);
2980 
2981 /* List of devices */
2982 static struct net_device *hp100_devlist[HP100_DEVICES];
2983 
2984 static int __init hp100_isa_init(void)
2985 {
2986         struct net_device *dev;
2987         int i, err, cards = 0;
2988 
2989         /* Don't autoprobe ISA bus */
2990         if (hp100_port[0] == 0)
2991                 return -ENODEV;
2992 
2993         /* Loop on all possible base addresses */
2994         for (i = 0; i < HP100_DEVICES && hp100_port[i] != -1; ++i) {
2995                 dev = alloc_etherdev(sizeof(struct hp100_private));
2996                 if (!dev) {
2997                         while (cards > 0)
2998                                 cleanup_dev(hp100_devlist[--cards]);
2999 
3000                         return -ENOMEM;
3001                 }
3002 
3003                 err = hp100_isa_probe(dev, hp100_port[i]);
3004                 if (!err)
3005                         hp100_devlist[cards++] = dev;
3006                 else
3007                         free_netdev(dev);
3008         }
3009 
3010         return cards > 0 ? 0 : -ENODEV;
3011 }
3012 
3013 static void hp100_isa_cleanup(void)
3014 {
3015         int i;
3016 
3017         for (i = 0; i < HP100_DEVICES; i++) {
3018                 struct net_device *dev = hp100_devlist[i];
3019                 if (dev)
3020                         cleanup_dev(dev);
3021         }
3022 }
3023 #else
3024 #define hp100_isa_init()        (0)
3025 #define hp100_isa_cleanup()     do { } while(0)
3026 #endif
3027 
3028 static int __init hp100_module_init(void)
3029 {
3030         int err;
3031 
3032         err = hp100_isa_init();
3033         if (err && err != -ENODEV)
3034                 goto out;
3035 #ifdef CONFIG_EISA
3036         err = eisa_driver_register(&hp100_eisa_driver);
3037         if (err && err != -ENODEV)
3038                 goto out2;
3039 #endif
3040 #ifdef CONFIG_PCI
3041         err = pci_register_driver(&hp100_pci_driver);
3042         if (err && err != -ENODEV)
3043                 goto out3;
3044 #endif
3045  out:
3046         return err;
3047  out3:
3048 #ifdef CONFIG_EISA
3049         eisa_driver_unregister (&hp100_eisa_driver);
3050  out2:
3051 #endif
3052         hp100_isa_cleanup();
3053         goto out;
3054 }
3055 
3056 
3057 static void __exit hp100_module_exit(void)
3058 {
3059         hp100_isa_cleanup();
3060 #ifdef CONFIG_EISA
3061         eisa_driver_unregister (&hp100_eisa_driver);
3062 #endif
3063 #ifdef CONFIG_PCI
3064         pci_unregister_driver (&hp100_pci_driver);
3065 #endif
3066 }
3067 
3068 module_init(hp100_module_init)
3069 module_exit(hp100_module_exit)
3070 

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