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

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