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

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