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

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

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