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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / net / tokenring / 3c359.c
blob0d1dcf421771f64970ce4b8746d4c5f4acc59f8d
1 /*
2 * 3c359.c (c) 2000 Mike Phillips (mikep@linuxtr.net) All Rights Reserved
3 *
4 * Linux driver for 3Com 3c359 Tokenlink Velocity XL PCI NIC
5 *
6 * Base Driver Olympic:
7 * Written 1999 Peter De Schrijver & Mike Phillips
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 * 7/17/00 - Clean up, version number 0.9.0. Ready to release to the world.
13 *
14 * 2/16/01 - Port up to kernel 2.4.2 ready for submission into the kernel.
15 * 3/05/01 - Last clean up stuff before submission.
16 * 2/15/01 - Finally, update to new pci api.
17 *
18 * To Do:
19 */
20
21 /*
22 * Technical Card Details
23 *
24 * All access to data is done with 16/8 bit transfers. The transfer
25 * method really sucks. You can only read or write one location at a time.
26 *
27 * Also, the microcode for the card must be uploaded if the card does not have
28 * the flashrom on board. This is a 28K bloat in the driver when compiled
29 * as a module.
30 *
31 * Rx is very simple, status into a ring of descriptors, dma data transfer,
32 * interrupts to tell us when a packet is received.
33 *
34 * Tx is a little more interesting. Similar scenario, descriptor and dma data
35 * transfers, but we don't have to interrupt the card to tell it another packet
36 * is ready for transmission, we are just doing simple memory writes, not io or mmio
37 * writes. The card can be set up to simply poll on the next
38 * descriptor pointer and when this value is non-zero will automatically download
39 * the next packet. The card then interrupts us when the packet is done.
40 *
41 */
42
43 #define XL_DEBUG 0
44
45 #include <linux/config.h>
46 #include <linux/module.h>
47 #include <linux/kernel.h>
48 #include <linux/errno.h>
49 #include <linux/timer.h>
50 #include <linux/in.h>
51 #include <linux/ioport.h>
52 #include <linux/string.h>
53 #include <linux/proc_fs.h>
54 #include <linux/ptrace.h>
55 #include <linux/skbuff.h>
56 #include <linux/interrupt.h>
57 #include <linux/delay.h>
58 #include <linux/netdevice.h>
59 #include <linux/trdevice.h>
60 #include <linux/stddef.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/spinlock.h>
64 #include <linux/bitops.h>
65
66 #include <net/checksum.h>
67
68 #include <asm/io.h>
69 #include <asm/system.h>
70
71 #include "3c359.h"
72
73 static char version[] __devinitdata =
74 "3c359.c v1.2.0 2/17/01 - Mike Phillips (mikep@linuxtr.net)" ;
75
76 MODULE_AUTHOR("Mike Phillips <mikep@linuxtr.net>") ;
77 MODULE_DESCRIPTION("3Com 3C359 Velocity XL Token Ring Adapter Driver \n") ;
78
79 /* Module paramters */
80
81 /* Ring Speed 0,4,16
82 * 0 = Autosense
83 * 4,16 = Selected speed only, no autosense
84 * This allows the card to be the first on the ring
85 * and become the active monitor.
86 *
87 * WARNING: Some hubs will allow you to insert
88 * at the wrong speed.
89 *
90 * The adapter will _not_ fail to open if there are no
91 * active monitors on the ring, it will simply open up in
92 * its last known ringspeed if no ringspeed is specified.
93 */
94
95 static int ringspeed[XL_MAX_ADAPTERS] = {0,} ;
96
97 module_param_array(ringspeed, int, NULL, 0);
98 MODULE_PARM_DESC(ringspeed,"3c359: Ringspeed selection - 4,16 or 0") ;
99
100 /* Packet buffer size */
101
102 static int pkt_buf_sz[XL_MAX_ADAPTERS] = {0,} ;
103
104 module_param_array(pkt_buf_sz, int, NULL, 0) ;
105 MODULE_PARM_DESC(pkt_buf_sz,"3c359: Initial buffer size") ;
106 /* Message Level */
107
108 static int message_level[XL_MAX_ADAPTERS] = {0,} ;
109
110 module_param_array(message_level, int, NULL, 0) ;
111 MODULE_PARM_DESC(message_level, "3c359: Level of reported messages \n") ;
112 /*
113 * This is a real nasty way of doing this, but otherwise you
114 * will be stuck with 1555 lines of hex #'s in the code.
115 */
116
117 #include "3c359_microcode.h"
118
119 static struct pci_device_id xl_pci_tbl[] =
120 {
121 {PCI_VENDOR_ID_3COM,PCI_DEVICE_ID_3COM_3C359, PCI_ANY_ID, PCI_ANY_ID, },
122 { } /* terminate list */
123 };
124 MODULE_DEVICE_TABLE(pci,xl_pci_tbl) ;
125
126 static int xl_init(struct net_device *dev);
127 static int xl_open(struct net_device *dev);
128 static int xl_open_hw(struct net_device *dev) ;
129 static int xl_hw_reset(struct net_device *dev);
130 static int xl_xmit(struct sk_buff *skb, struct net_device *dev);
131 static void xl_dn_comp(struct net_device *dev);
132 static int xl_close(struct net_device *dev);
133 static void xl_set_rx_mode(struct net_device *dev);
134 static irqreturn_t xl_interrupt(int irq, void *dev_id, struct pt_regs *regs);
135 static struct net_device_stats * xl_get_stats(struct net_device *dev);
136 static int xl_set_mac_address(struct net_device *dev, void *addr) ;
137 static void xl_arb_cmd(struct net_device *dev);
138 static void xl_asb_cmd(struct net_device *dev) ;
139 static void xl_srb_cmd(struct net_device *dev, int srb_cmd) ;
140 static void xl_wait_misr_flags(struct net_device *dev) ;
141 static int xl_change_mtu(struct net_device *dev, int mtu);
142 static void xl_srb_bh(struct net_device *dev) ;
143 static void xl_asb_bh(struct net_device *dev) ;
144 static void xl_reset(struct net_device *dev) ;
145 static void xl_freemem(struct net_device *dev) ;
146
147
148 /* EEProm Access Functions */
149 static u16 xl_ee_read(struct net_device *dev, int ee_addr) ;
150 static void xl_ee_write(struct net_device *dev, int ee_addr, u16 ee_value) ;
151
152 /* Debugging functions */
153 #if XL_DEBUG
154 static void print_tx_state(struct net_device *dev) ;
155 static void print_rx_state(struct net_device *dev) ;
156
157 static void print_tx_state(struct net_device *dev)
158 {
159
160 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
161 struct xl_tx_desc *txd ;
162 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
163 int i ;
164
165 printk("tx_ring_head: %d, tx_ring_tail: %d, free_ent: %d \n",xl_priv->tx_ring_head,
166 xl_priv->tx_ring_tail, xl_priv->free_ring_entries) ;
167 printk("Ring , Address , FSH , DnNextPtr, Buffer, Buffer_Len \n");
168 for (i = 0; i < 16; i++) {
169 txd = &(xl_priv->xl_tx_ring[i]) ;
170 printk("%d, %08lx, %08x, %08x, %08x, %08x \n", i, virt_to_bus(txd),
171 txd->framestartheader, txd->dnnextptr, txd->buffer, txd->buffer_length ) ;
172 }
173
174 printk("DNLISTPTR = %04x \n", readl(xl_mmio + MMIO_DNLISTPTR) );
175
176 printk("DmaCtl = %04x \n", readl(xl_mmio + MMIO_DMA_CTRL) );
177 printk("Queue status = %0x \n",netif_running(dev) ) ;
178 }
179
180 static void print_rx_state(struct net_device *dev)
181 {
182
183 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
184 struct xl_rx_desc *rxd ;
185 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
186 int i ;
187
188 printk("rx_ring_tail: %d \n", xl_priv->rx_ring_tail) ;
189 printk("Ring , Address , FrameState , UPNextPtr, FragAddr, Frag_Len \n");
190 for (i = 0; i < 16; i++) {
191 /* rxd = (struct xl_rx_desc *)xl_priv->rx_ring_dma_addr + (i * sizeof(struct xl_rx_desc)) ; */
192 rxd = &(xl_priv->xl_rx_ring[i]) ;
193 printk("%d, %08lx, %08x, %08x, %08x, %08x \n", i, virt_to_bus(rxd),
194 rxd->framestatus, rxd->upnextptr, rxd->upfragaddr, rxd->upfraglen ) ;
195 }
196
197 printk("UPLISTPTR = %04x \n", readl(xl_mmio + MMIO_UPLISTPTR) );
198
199 printk("DmaCtl = %04x \n", readl(xl_mmio + MMIO_DMA_CTRL) );
200 printk("Queue status = %0x \n",netif_running(dev) ) ;
201 }
202 #endif
203
204 /*
205 * Read values from the on-board EEProm. This looks very strange
206 * but you have to wait for the EEProm to get/set the value before
207 * passing/getting the next value from the nic. As with all requests
208 * on this nic it has to be done in two stages, a) tell the nic which
209 * memory address you want to access and b) pass/get the value from the nic.
210 * With the EEProm, you have to wait before and inbetween access a) and b).
211 * As this is only read at initialization time and the wait period is very
212 * small we shouldn't have to worry about scheduling issues.
213 */
214
215 static u16 xl_ee_read(struct net_device *dev, int ee_addr)
216 {
217 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
218 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
219
220 /* Wait for EEProm to not be busy */
221 writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
222 while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
223
224 /* Tell EEProm what we want to do and where */
225 writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
226 writew(EEREAD + ee_addr, xl_mmio + MMIO_MACDATA) ;
227
228 /* Wait for EEProm to not be busy */
229 writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
230 while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
231
232 /* Tell EEProm what we want to do and where */
233 writel(IO_WORD_WRITE | EECONTROL , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
234 writew(EEREAD + ee_addr, xl_mmio + MMIO_MACDATA) ;
235
236 /* Finally read the value from the EEProm */
237 writel(IO_WORD_READ | EEDATA , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
238 return readw(xl_mmio + MMIO_MACDATA) ;
239 }
240
241 /*
242 * Write values to the onboard eeprom. As with eeprom read you need to
243 * set which location to write, wait, value to write, wait, with the
244 * added twist of having to enable eeprom writes as well.
245 */
246
247 static void xl_ee_write(struct net_device *dev, int ee_addr, u16 ee_value)
248 {
249 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
250 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
251
252 /* Wait for EEProm to not be busy */
253 writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
254 while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
255
256 /* Enable write/erase */
257 writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
258 writew(EE_ENABLE_WRITE, xl_mmio + MMIO_MACDATA) ;
259
260 /* Wait for EEProm to not be busy */
261 writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
262 while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
263
264 /* Put the value we want to write into EEDATA */
265 writel(IO_WORD_WRITE | EEDATA, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
266 writew(ee_value, xl_mmio + MMIO_MACDATA) ;
267
268 /* Tell EEProm to write eevalue into ee_addr */
269 writel(IO_WORD_WRITE | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
270 writew(EEWRITE + ee_addr, xl_mmio + MMIO_MACDATA) ;
271
272 /* Wait for EEProm to not be busy, to ensure write gets done */
273 writel(IO_WORD_READ | EECONTROL, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
274 while ( readw(xl_mmio + MMIO_MACDATA) & EEBUSY ) ;
275
276 return ;
277 }
278
279 int __devinit xl_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
280 {
281 struct net_device *dev ;
282 struct xl_private *xl_priv ;
283 static int card_no = -1 ;
284 int i ;
285
286 card_no++ ;
287
288 if (pci_enable_device(pdev)) {
289 return -ENODEV ;
290 }
291
292 pci_set_master(pdev);
293
294 if ((i = pci_request_regions(pdev,"3c359"))) {
295 return i ;
296 } ;
297
298 /*
299 * Allowing init_trdev to allocate the dev->priv structure will align xl_private
300 * on a 32 bytes boundary which we need for the rx/tx descriptors
301 */
302
303 dev = alloc_trdev(sizeof(struct xl_private)) ;
304 if (!dev) {
305 pci_release_regions(pdev) ;
306 return -ENOMEM ;
307 }
308 xl_priv = dev->priv ;
309
310 #if XL_DEBUG
311 printk("pci_device: %p, dev:%p, dev->priv: %p, ba[0]: %10x, ba[1]:%10x\n",
312 pdev, dev, dev->priv, (unsigned int)pdev->resource[0].start, (unsigned int)pdev->resource[1].start) ;
313 #endif
314
315 dev->irq=pdev->irq;
316 dev->base_addr=pci_resource_start(pdev,0) ;
317 xl_priv->xl_card_name = pci_name(pdev);
318 xl_priv->xl_mmio=ioremap(pci_resource_start(pdev,1), XL_IO_SPACE);
319 xl_priv->pdev = pdev ;
320
321 if ((pkt_buf_sz[card_no] < 100) || (pkt_buf_sz[card_no] > 18000) )
322 xl_priv->pkt_buf_sz = PKT_BUF_SZ ;
323 else
324 xl_priv->pkt_buf_sz = pkt_buf_sz[card_no] ;
325
326 dev->mtu = xl_priv->pkt_buf_sz - TR_HLEN ;
327 xl_priv->xl_ring_speed = ringspeed[card_no] ;
328 xl_priv->xl_message_level = message_level[card_no] ;
329 xl_priv->xl_functional_addr[0] = xl_priv->xl_functional_addr[1] = xl_priv->xl_functional_addr[2] = xl_priv->xl_functional_addr[3] = 0 ;
330 xl_priv->xl_copy_all_options = 0 ;
331
332 if((i = xl_init(dev))) {
333 iounmap(xl_priv->xl_mmio) ;
334 free_netdev(dev) ;
335 pci_release_regions(pdev) ;
336 return i ;
337 }
338
339 dev->open=&xl_open;
340 dev->hard_start_xmit=&xl_xmit;
341 dev->change_mtu=&xl_change_mtu;
342 dev->stop=&xl_close;
343 dev->do_ioctl=NULL;
344 dev->set_multicast_list=&xl_set_rx_mode;
345 dev->get_stats=&xl_get_stats ;
346 dev->set_mac_address=&xl_set_mac_address ;
347 SET_MODULE_OWNER(dev);
348 SET_NETDEV_DEV(dev, &pdev->dev);
349
350 pci_set_drvdata(pdev,dev) ;
351 if ((i = register_netdev(dev))) {
352 printk(KERN_ERR "3C359, register netdev failed\n") ;
353 pci_set_drvdata(pdev,NULL) ;
354 iounmap(xl_priv->xl_mmio) ;
355 free_netdev(dev) ;
356 pci_release_regions(pdev) ;
357 return i ;
358 }
359
360 printk(KERN_INFO "3C359: %s registered as: %s\n",xl_priv->xl_card_name,dev->name) ;
361
362 return 0;
363 }
364
365
366 static int __init xl_init(struct net_device *dev)
367 {
368 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
369
370 printk(KERN_INFO "%s \n", version);
371 printk(KERN_INFO "%s: I/O at %hx, MMIO at %p, using irq %d\n",
372 xl_priv->xl_card_name, (unsigned int)dev->base_addr ,xl_priv->xl_mmio, dev->irq);
373
374 spin_lock_init(&xl_priv->xl_lock) ;
375
376 return xl_hw_reset(dev) ;
377
378 }
379
380
381 /*
382 * Hardware reset. This needs to be a separate entity as we need to reset the card
383 * when we change the EEProm settings.
384 */
385
386 static int xl_hw_reset(struct net_device *dev)
387 {
388 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
389 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
390 unsigned long t ;
391 u16 i ;
392 u16 result_16 ;
393 u8 result_8 ;
394 u16 start ;
395 int j ;
396
397 /*
398 * Reset the card. If the card has got the microcode on board, we have
399 * missed the initialization interrupt, so we must always do this.
400 */
401
402 writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
403
404 /*
405 * Must wait for cmdInProgress bit (12) to clear before continuing with
406 * card configuration.
407 */
408
409 t=jiffies;
410 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
411 schedule();
412 if(jiffies-t > 40*HZ) {
413 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL card not responding to global reset.\n", dev->name);
414 return -ENODEV;
415 }
416 }
417
418 /*
419 * Enable pmbar by setting bit in CPAttention
420 */
421
422 writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
423 result_8 = readb(xl_mmio + MMIO_MACDATA) ;
424 result_8 = result_8 | CPA_PMBARVIS ;
425 writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
426 writeb(result_8, xl_mmio + MMIO_MACDATA) ;
427
428 /*
429 * Read cpHold bit in pmbar, if cleared we have got Flashrom on board.
430 * If not, we need to upload the microcode to the card
431 */
432
433 writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
434
435 #if XL_DEBUG
436 printk(KERN_INFO "Read from PMBAR = %04x \n", readw(xl_mmio + MMIO_MACDATA)) ;
437 #endif
438
439 if ( readw( (xl_mmio + MMIO_MACDATA)) & PMB_CPHOLD ) {
440
441 /* Set PmBar, privateMemoryBase bits (8:2) to 0 */
442
443 writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
444 result_16 = readw(xl_mmio + MMIO_MACDATA) ;
445 result_16 = result_16 & ~((0x7F) << 2) ;
446 writel( (IO_WORD_WRITE | PMBAR), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
447 writew(result_16,xl_mmio + MMIO_MACDATA) ;
448
449 /* Set CPAttention, memWrEn bit */
450
451 writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
452 result_8 = readb(xl_mmio + MMIO_MACDATA) ;
453 result_8 = result_8 | CPA_MEMWREN ;
454 writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
455 writeb(result_8, xl_mmio + MMIO_MACDATA) ;
456
457 /*
458 * Now to write the microcode into the shared ram
459 * The microcode must finish at position 0xFFFF, so we must subtract
460 * to get the start position for the code
461 */
462
463 start = (0xFFFF - (mc_size) + 1 ) ; /* Looks strange but ensures compiler only uses 16 bit unsigned int for this */
464
465 printk(KERN_INFO "3C359: Uploading Microcode: ");
466
467 for (i = start, j = 0; j < mc_size; i++, j++) {
468 writel(MEM_BYTE_WRITE | 0XD0000 | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
469 writeb(microcode[j],xl_mmio + MMIO_MACDATA) ;
470 if (j % 1024 == 0)
471 printk(".");
472 }
473 printk("\n") ;
474
475 for (i=0;i < 16; i++) {
476 writel( (MEM_BYTE_WRITE | 0xDFFF0) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
477 writeb(microcode[mc_size - 16 + i], xl_mmio + MMIO_MACDATA) ;
478 }
479
480 /*
481 * Have to write the start address of the upload to FFF4, but
482 * the address must be >> 4. You do not want to know how long
483 * it took me to discover this.
484 */
485
486 writel(MEM_WORD_WRITE | 0xDFFF4, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
487 writew(start >> 4, xl_mmio + MMIO_MACDATA);
488
489 /* Clear the CPAttention, memWrEn Bit */
490
491 writel( (IO_BYTE_READ | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
492 result_8 = readb(xl_mmio + MMIO_MACDATA) ;
493 result_8 = result_8 & ~CPA_MEMWREN ;
494 writel( (IO_BYTE_WRITE | CPATTENTION), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
495 writeb(result_8, xl_mmio + MMIO_MACDATA) ;
496
497 /* Clear the cpHold bit in pmbar */
498
499 writel( (IO_WORD_READ | PMBAR),xl_mmio + MMIO_MAC_ACCESS_CMD);
500 result_16 = readw(xl_mmio + MMIO_MACDATA) ;
501 result_16 = result_16 & ~PMB_CPHOLD ;
502 writel( (IO_WORD_WRITE | PMBAR), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
503 writew(result_16,xl_mmio + MMIO_MACDATA) ;
504
505
506 } /* If microcode upload required */
507
508 /*
509 * The card should now go though a self test procedure and get itself ready
510 * to be opened, we must wait for an srb response with the initialization
511 * information.
512 */
513
514 #if XL_DEBUG
515 printk(KERN_INFO "%s: Microcode uploaded, must wait for the self test to complete\n", dev->name);
516 #endif
517
518 writew(SETINDENABLE | 0xFFF, xl_mmio + MMIO_COMMAND) ;
519
520 t=jiffies;
521 while ( !(readw(xl_mmio + MMIO_INTSTATUS_AUTO) & INTSTAT_SRB) ) {
522 schedule();
523 if(jiffies-t > 15*HZ) {
524 printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
525 return -ENODEV;
526 }
527 }
528
529 /*
530 * Write the RxBufArea with D000, RxEarlyThresh, TxStartThresh,
531 * DnPriReqThresh, read the tech docs if you want to know what
532 * values they need to be.
533 */
534
535 writel(MMIO_WORD_WRITE | RXBUFAREA, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
536 writew(0xD000, xl_mmio + MMIO_MACDATA) ;
537
538 writel(MMIO_WORD_WRITE | RXEARLYTHRESH, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
539 writew(0X0020, xl_mmio + MMIO_MACDATA) ;
540
541 writew( SETTXSTARTTHRESH | 0x40 , xl_mmio + MMIO_COMMAND) ;
542
543 writeb(0x04, xl_mmio + MMIO_DNBURSTTHRESH) ;
544 writeb(0x04, xl_mmio + DNPRIREQTHRESH) ;
545
546 /*
547 * Read WRBR to provide the location of the srb block, have to use byte reads not word reads.
548 * Tech docs have this wrong !!!!
549 */
550
551 writel(MMIO_BYTE_READ | WRBR, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
552 xl_priv->srb = readb(xl_mmio + MMIO_MACDATA) << 8 ;
553 writel( (MMIO_BYTE_READ | WRBR) + 1, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
554 xl_priv->srb = xl_priv->srb | readb(xl_mmio + MMIO_MACDATA) ;
555
556 #if XL_DEBUG
557 writel(IO_WORD_READ | SWITCHSETTINGS, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
558 if ( readw(xl_mmio + MMIO_MACDATA) & 2) {
559 printk(KERN_INFO "Default ring speed 4 mbps \n") ;
560 } else {
561 printk(KERN_INFO "Default ring speed 16 mbps \n") ;
562 }
563 printk(KERN_INFO "%s: xl_priv->srb = %04x\n",xl_priv->xl_card_name, xl_priv->srb);
564 #endif
565
566 return 0;
567 }
568
569 static int xl_open(struct net_device *dev)
570 {
571 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
572 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
573 u8 i ;
574 u16 hwaddr[3] ; /* Should be u8[6] but we get word return values */
575 int open_err ;
576
577 u16 switchsettings, switchsettings_eeprom ;
578
579 if(request_irq(dev->irq, &xl_interrupt, SA_SHIRQ , "3c359", dev)) {
580 return -EAGAIN;
581 }
582
583 /*
584 * Read the information from the EEPROM that we need. I know we
585 * should use ntohs, but the word gets stored reversed in the 16
586 * bit field anyway and it all works its self out when we memcpy
587 * it into dev->dev_addr.
588 */
589
590 hwaddr[0] = xl_ee_read(dev,0x10) ;
591 hwaddr[1] = xl_ee_read(dev,0x11) ;
592 hwaddr[2] = xl_ee_read(dev,0x12) ;
593
594 /* Ring speed */
595
596 switchsettings_eeprom = xl_ee_read(dev,0x08) ;
597 switchsettings = switchsettings_eeprom ;
598
599 if (xl_priv->xl_ring_speed != 0) {
600 if (xl_priv->xl_ring_speed == 4)
601 switchsettings = switchsettings | 0x02 ;
602 else
603 switchsettings = switchsettings & ~0x02 ;
604 }
605
606 /* Only write EEProm if there has been a change */
607 if (switchsettings != switchsettings_eeprom) {
608 xl_ee_write(dev,0x08,switchsettings) ;
609 /* Hardware reset after changing EEProm */
610 xl_hw_reset(dev) ;
611 }
612
613 memcpy(dev->dev_addr,hwaddr,dev->addr_len) ;
614
615 open_err = xl_open_hw(dev) ;
616
617 /*
618 * This really needs to be cleaned up with better error reporting.
619 */
620
621 if (open_err != 0) { /* Something went wrong with the open command */
622 if (open_err & 0x07) { /* Wrong speed, retry at different speed */
623 printk(KERN_WARNING "%s: Open Error, retrying at different ringspeed \n", dev->name) ;
624 switchsettings = switchsettings ^ 2 ;
625 xl_ee_write(dev,0x08,switchsettings) ;
626 xl_hw_reset(dev) ;
627 open_err = xl_open_hw(dev) ;
628 if (open_err != 0) {
629 printk(KERN_WARNING "%s: Open error returned a second time, we're bombing out now\n", dev->name);
630 free_irq(dev->irq,dev) ;
631 return -ENODEV ;
632 }
633 } else {
634 printk(KERN_WARNING "%s: Open Error = %04x\n", dev->name, open_err) ;
635 free_irq(dev->irq,dev) ;
636 return -ENODEV ;
637 }
638 }
639
640 /*
641 * Now to set up the Rx and Tx buffer structures
642 */
643 /* These MUST be on 8 byte boundaries */
644 xl_priv->xl_tx_ring = kmalloc((sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE) + 7, GFP_DMA | GFP_KERNEL) ;
645 if (xl_priv->xl_tx_ring == NULL) {
646 printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers.\n",
647 dev->name);
648 free_irq(dev->irq,dev);
649 return -ENOMEM;
650 }
651 xl_priv->xl_rx_ring = kmalloc((sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE) +7, GFP_DMA | GFP_KERNEL) ;
652 if (xl_priv->xl_tx_ring == NULL) {
653 printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers.\n",
654 dev->name);
655 free_irq(dev->irq,dev);
656 kfree(xl_priv->xl_tx_ring);
657 return -ENOMEM;
658 }
659 memset(xl_priv->xl_tx_ring,0,sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE) ;
660 memset(xl_priv->xl_rx_ring,0,sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE) ;
661
662 /* Setup Rx Ring */
663 for (i=0 ; i < XL_RX_RING_SIZE ; i++) {
664 struct sk_buff *skb ;
665
666 skb = dev_alloc_skb(xl_priv->pkt_buf_sz) ;
667 if (skb==NULL)
668 break ;
669
670 skb->dev = dev ;
671 xl_priv->xl_rx_ring[i].upfragaddr = pci_map_single(xl_priv->pdev, skb->data,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
672 xl_priv->xl_rx_ring[i].upfraglen = xl_priv->pkt_buf_sz | RXUPLASTFRAG;
673 xl_priv->rx_ring_skb[i] = skb ;
674 }
675
676 if (i==0) {
677 printk(KERN_WARNING "%s: Not enough memory to allocate rx buffers. Adapter disabled \n",dev->name) ;
678 free_irq(dev->irq,dev) ;
679 return -EIO ;
680 }
681
682 xl_priv->rx_ring_no = i ;
683 xl_priv->rx_ring_tail = 0 ;
684 xl_priv->rx_ring_dma_addr = pci_map_single(xl_priv->pdev,xl_priv->xl_rx_ring, sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE, PCI_DMA_TODEVICE) ;
685 for (i=0;i<(xl_priv->rx_ring_no-1);i++) {
686 xl_priv->xl_rx_ring[i].upnextptr = xl_priv->rx_ring_dma_addr + (sizeof (struct xl_rx_desc) * (i+1)) ;
687 }
688 xl_priv->xl_rx_ring[i].upnextptr = 0 ;
689
690 writel(xl_priv->rx_ring_dma_addr, xl_mmio + MMIO_UPLISTPTR) ;
691
692 /* Setup Tx Ring */
693
694 xl_priv->tx_ring_dma_addr = pci_map_single(xl_priv->pdev,xl_priv->xl_tx_ring, sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE,PCI_DMA_TODEVICE) ;
695
696 xl_priv->tx_ring_head = 1 ;
697 xl_priv->tx_ring_tail = 255 ; /* Special marker for first packet */
698 xl_priv->free_ring_entries = XL_TX_RING_SIZE ;
699
700 /*
701 * Setup the first dummy DPD entry for polling to start working.
702 */
703
704 xl_priv->xl_tx_ring[0].framestartheader = TXDPDEMPTY ;
705 xl_priv->xl_tx_ring[0].buffer = 0 ;
706 xl_priv->xl_tx_ring[0].buffer_length = 0 ;
707 xl_priv->xl_tx_ring[0].dnnextptr = 0 ;
708
709 writel(xl_priv->tx_ring_dma_addr, xl_mmio + MMIO_DNLISTPTR) ;
710 writel(DNUNSTALL, xl_mmio + MMIO_COMMAND) ;
711 writel(UPUNSTALL, xl_mmio + MMIO_COMMAND) ;
712 writel(DNENABLE, xl_mmio + MMIO_COMMAND) ;
713 writeb(0x40, xl_mmio + MMIO_DNPOLL) ;
714
715 /*
716 * Enable interrupts on the card
717 */
718
719 writel(SETINTENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
720 writel(SETINDENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
721
722 netif_start_queue(dev) ;
723 return 0;
724
725 }
726
727 static int xl_open_hw(struct net_device *dev)
728 {
729 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
730 u8 __iomem *xl_mmio = xl_priv->xl_mmio ;
731 u16 vsoff ;
732 char ver_str[33];
733 int open_err ;
734 int i ;
735 unsigned long t ;
736
737 /*
738 * Okay, let's build up the Open.NIC srb command
739 *
740 */
741
742 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
743 writeb(OPEN_NIC, xl_mmio + MMIO_MACDATA) ;
744
745 /*
746 * Use this as a test byte, if it comes back with the same value, the command didn't work
747 */
748
749 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb)+ 2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
750 writeb(0xff,xl_mmio + MMIO_MACDATA) ;
751
752 /* Open options */
753 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + 8, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
754 writeb(0x00, xl_mmio + MMIO_MACDATA) ;
755 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + 9, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
756 writeb(0x00, xl_mmio + MMIO_MACDATA) ;
757
758 /*
759 * Node address, be careful here, the docs say you can just put zeros here and it will use
760 * the hardware address, it doesn't, you must include the node address in the open command.
761 */
762
763 if (xl_priv->xl_laa[0]) { /* If using a LAA address */
764 for (i=10;i<16;i++) {
765 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
766 writeb(xl_priv->xl_laa[i],xl_mmio + MMIO_MACDATA) ;
767 }
768 memcpy(dev->dev_addr,xl_priv->xl_laa,dev->addr_len) ;
769 } else { /* Regular hardware address */
770 for (i=10;i<16;i++) {
771 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
772 writeb(dev->dev_addr[i-10], xl_mmio + MMIO_MACDATA) ;
773 }
774 }
775
776 /* Default everything else to 0 */
777 for (i = 16; i < 34; i++) {
778 writel( (MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
779 writeb(0x00,xl_mmio + MMIO_MACDATA) ;
780 }
781
782 /*
783 * Set the csrb bit in the MISR register
784 */
785
786 xl_wait_misr_flags(dev) ;
787 writel(MEM_BYTE_WRITE | MF_CSRB, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
788 writeb(0xFF, xl_mmio + MMIO_MACDATA) ;
789 writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
790 writeb(MISR_CSRB , xl_mmio + MMIO_MACDATA) ;
791
792 /*
793 * Now wait for the command to run
794 */
795
796 t=jiffies;
797 while (! (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_SRB)) {
798 schedule();
799 if(jiffies-t > 40*HZ) {
800 printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
801 break ;
802 }
803 }
804
805 /*
806 * Let's interpret the open response
807 */
808
809 writel( (MEM_BYTE_READ | 0xD0000 | xl_priv->srb)+2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
810 if (readb(xl_mmio + MMIO_MACDATA)!=0) {
811 open_err = readb(xl_mmio + MMIO_MACDATA) << 8 ;
812 writel( (MEM_BYTE_READ | 0xD0000 | xl_priv->srb) + 7, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
813 open_err |= readb(xl_mmio + MMIO_MACDATA) ;
814 return open_err ;
815 } else {
816 writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 8, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
817 xl_priv->asb = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
818 printk(KERN_INFO "%s: Adapter Opened Details: ",dev->name) ;
819 printk("ASB: %04x",xl_priv->asb ) ;
820 writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 10, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
821 printk(", SRB: %04x",ntohs(readw(xl_mmio + MMIO_MACDATA)) ) ;
822
823 writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 12, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
824 xl_priv->arb = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
825 printk(", ARB: %04x \n",xl_priv->arb ) ;
826 writel( (MEM_WORD_READ | 0xD0000 | xl_priv->srb) + 14, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
827 vsoff = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
828
829 /*
830 * Interesting, sending the individual characters directly to printk was causing klogd to use
831 * use 100% of processor time, so we build up the string and print that instead.
832 */
833
834 for (i=0;i<0x20;i++) {
835 writel( (MEM_BYTE_READ | 0xD0000 | vsoff) + i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
836 ver_str[i] = readb(xl_mmio + MMIO_MACDATA) ;
837 }
838 ver_str[i] = '\0' ;
839 printk(KERN_INFO "%s: Microcode version String: %s \n",dev->name,ver_str);
840 }
841
842 /*
843 * Issue the AckInterrupt
844 */
845 writew(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
846
847 return 0 ;
848 }
849
850 /*
851 * There are two ways of implementing rx on the 359 NIC, either
852 * interrupt driven or polling. We are going to uses interrupts,
853 * it is the easier way of doing things.
854 *
855 * The Rx works with a ring of Rx descriptors. At initialise time the ring
856 * entries point to the next entry except for the last entry in the ring
857 * which points to 0. The card is programmed with the location of the first
858 * available descriptor and keeps reading the next_ptr until next_ptr is set
859 * to 0. Hopefully with a ring size of 16 the card will never get to read a next_ptr
860 * of 0. As the Rx interrupt is received we copy the frame up to the protocol layers
861 * and then point the end of the ring to our current position and point our current
862 * position to 0, therefore making the current position the last position on the ring.
863 * The last position on the ring therefore loops continually loops around the rx ring.
864 *
865 * rx_ring_tail is the position on the ring to process next. (Think of a snake, the head
866 * expands as the card adds new packets and we go around eating the tail processing the
867 * packets.)
868 *
869 * Undoubtably it could be streamlined and improved upon, but at the moment it works
870 * and the fast path through the routine is fine.
871 *
872 * adv_rx_ring could be inlined to increase performance, but its called a *lot* of times
873 * in xl_rx so would increase the size of the function significantly.
874 */
875
876 static void adv_rx_ring(struct net_device *dev) /* Advance rx_ring, cut down on bloat in xl_rx */
877 {
878 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
879 int prev_ring_loc ;
880
881 prev_ring_loc = (xl_priv->rx_ring_tail + XL_RX_RING_SIZE - 1) & (XL_RX_RING_SIZE - 1);
882 xl_priv->xl_rx_ring[prev_ring_loc].upnextptr = xl_priv->rx_ring_dma_addr + (sizeof (struct xl_rx_desc) * xl_priv->rx_ring_tail) ;
883 xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus = 0 ;
884 xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upnextptr = 0 ;
885 xl_priv->rx_ring_tail++ ;
886 xl_priv->rx_ring_tail &= (XL_RX_RING_SIZE-1) ;
887
888 return ;
889 }
890
891 static void xl_rx(struct net_device *dev)
892 {
893 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
894 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
895 struct sk_buff *skb, *skb2 ;
896 int frame_length = 0, copy_len = 0 ;
897 int temp_ring_loc ;
898
899 /*
900 * Receive the next frame, loop around the ring until all frames
901 * have been received.
902 */
903
904 while (xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & (RXUPDCOMPLETE | RXUPDFULL) ) { /* Descriptor to process */
905
906 if (xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & RXUPDFULL ) { /* UpdFull, Multiple Descriptors used for the frame */
907
908 /*
909 * This is a pain, you need to go through all the descriptors until the last one
910 * for this frame to find the framelength
911 */
912
913 temp_ring_loc = xl_priv->rx_ring_tail ;
914
915 while (xl_priv->xl_rx_ring[temp_ring_loc].framestatus & RXUPDFULL ) {
916 temp_ring_loc++ ;
917 temp_ring_loc &= (XL_RX_RING_SIZE-1) ;
918 }
919
920 frame_length = xl_priv->xl_rx_ring[temp_ring_loc].framestatus & 0x7FFF ;
921
922 skb = dev_alloc_skb(frame_length) ;
923
924 if (skb==NULL) { /* No memory for frame, still need to roll forward the rx ring */
925 printk(KERN_WARNING "%s: dev_alloc_skb failed - multi buffer !\n", dev->name) ;
926 while (xl_priv->rx_ring_tail != temp_ring_loc)
927 adv_rx_ring(dev) ;
928
929 adv_rx_ring(dev) ; /* One more time just for luck :) */
930 xl_priv->xl_stats.rx_dropped++ ;
931
932 writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
933 return ;
934 }
935
936 skb->dev = dev ;
937
938 while (xl_priv->rx_ring_tail != temp_ring_loc) {
939 copy_len = xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfraglen & 0x7FFF ;
940 frame_length -= copy_len ;
941 pci_dma_sync_single_for_cpu(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
942 memcpy(skb_put(skb,copy_len), xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]->data, copy_len) ;
943 pci_dma_sync_single_for_device(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
944 adv_rx_ring(dev) ;
945 }
946
947 /* Now we have found the last fragment */
948 pci_dma_sync_single_for_cpu(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
949 memcpy(skb_put(skb,copy_len), xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]->data, frame_length) ;
950 /* memcpy(skb_put(skb,frame_length), bus_to_virt(xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr), frame_length) ; */
951 pci_dma_sync_single_for_device(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
952 adv_rx_ring(dev) ;
953 skb->protocol = tr_type_trans(skb,dev) ;
954 netif_rx(skb) ;
955
956 } else { /* Single Descriptor Used, simply swap buffers over, fast path */
957
958 frame_length = xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].framestatus & 0x7FFF ;
959
960 skb = dev_alloc_skb(xl_priv->pkt_buf_sz) ;
961
962 if (skb==NULL) { /* Still need to fix the rx ring */
963 printk(KERN_WARNING "%s: dev_alloc_skb failed in rx, single buffer \n",dev->name) ;
964 adv_rx_ring(dev) ;
965 xl_priv->xl_stats.rx_dropped++ ;
966 writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
967 return ;
968 }
969
970 skb->dev = dev ;
971
972 skb2 = xl_priv->rx_ring_skb[xl_priv->rx_ring_tail] ;
973 pci_unmap_single(xl_priv->pdev, xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr, xl_priv->pkt_buf_sz,PCI_DMA_FROMDEVICE) ;
974 skb_put(skb2, frame_length) ;
975 skb2->protocol = tr_type_trans(skb2,dev) ;
976
977 xl_priv->rx_ring_skb[xl_priv->rx_ring_tail] = skb ;
978 xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr = pci_map_single(xl_priv->pdev,skb->data,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
979 xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfraglen = xl_priv->pkt_buf_sz | RXUPLASTFRAG ;
980 adv_rx_ring(dev) ;
981 xl_priv->xl_stats.rx_packets++ ;
982 xl_priv->xl_stats.rx_bytes += frame_length ;
983
984 netif_rx(skb2) ;
985 } /* if multiple buffers */
986 dev->last_rx = jiffies ;
987 } /* while packet to do */
988
989 /* Clear the updComplete interrupt */
990 writel(ACK_INTERRUPT | UPCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
991 return ;
992 }
993
994 /*
995 * This is ruthless, it doesn't care what state the card is in it will
996 * completely reset the adapter.
997 */
998
999 static void xl_reset(struct net_device *dev)
1000 {
1001 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
1002 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1003 unsigned long t;
1004
1005 writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
1006
1007 /*
1008 * Must wait for cmdInProgress bit (12) to clear before continuing with
1009 * card configuration.
1010 */
1011
1012 t=jiffies;
1013 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1014 if(jiffies-t > 40*HZ) {
1015 printk(KERN_ERR "3COM 3C359 Velocity XL card not responding.\n");
1016 break ;
1017 }
1018 }
1019
1020 }
1021
1022 static void xl_freemem(struct net_device *dev)
1023 {
1024 struct xl_private *xl_priv=(struct xl_private *)dev->priv ;
1025 int i ;
1026
1027 for (i=0;i<XL_RX_RING_SIZE;i++) {
1028 dev_kfree_skb_irq(xl_priv->rx_ring_skb[xl_priv->rx_ring_tail]) ;
1029 pci_unmap_single(xl_priv->pdev,xl_priv->xl_rx_ring[xl_priv->rx_ring_tail].upfragaddr,xl_priv->pkt_buf_sz, PCI_DMA_FROMDEVICE) ;
1030 xl_priv->rx_ring_tail++ ;
1031 xl_priv->rx_ring_tail &= XL_RX_RING_SIZE-1;
1032 }
1033
1034 /* unmap ring */
1035 pci_unmap_single(xl_priv->pdev,xl_priv->rx_ring_dma_addr, sizeof(struct xl_rx_desc) * XL_RX_RING_SIZE, PCI_DMA_FROMDEVICE) ;
1036
1037 pci_unmap_single(xl_priv->pdev,xl_priv->tx_ring_dma_addr, sizeof(struct xl_tx_desc) * XL_TX_RING_SIZE, PCI_DMA_TODEVICE) ;
1038
1039 kfree(xl_priv->xl_rx_ring) ;
1040 kfree(xl_priv->xl_tx_ring) ;
1041
1042 return ;
1043 }
1044
1045 static irqreturn_t xl_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1046 {
1047 struct net_device *dev = (struct net_device *)dev_id;
1048 struct xl_private *xl_priv =(struct xl_private *)dev->priv;
1049 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1050 u16 intstatus, macstatus ;
1051
1052 if (!dev) {
1053 printk(KERN_WARNING "Device structure dead, aaahhhh !\n") ;
1054 return IRQ_NONE;
1055 }
1056
1057 intstatus = readw(xl_mmio + MMIO_INTSTATUS) ;
1058
1059 if (!(intstatus & 1)) /* We didn't generate the interrupt */
1060 return IRQ_NONE;
1061
1062 spin_lock(&xl_priv->xl_lock) ;
1063
1064 /*
1065 * Process the interrupt
1066 */
1067 /*
1068 * Something fishy going on here, we shouldn't get 0001 ints, not fatal though.
1069 */
1070 if (intstatus == 0x0001) {
1071 writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1072 printk(KERN_INFO "%s: 00001 int received \n",dev->name) ;
1073 } else {
1074 if (intstatus & (HOSTERRINT | SRBRINT | ARBCINT | UPCOMPINT | DNCOMPINT | HARDERRINT | (1<<8) | TXUNDERRUN | ASBFINT)) {
1075
1076 /*
1077 * Host Error.
1078 * It may be possible to recover from this, but usually it means something
1079 * is seriously fubar, so we just close the adapter.
1080 */
1081
1082 if (intstatus & HOSTERRINT) {
1083 printk(KERN_WARNING "%s: Host Error, performing global reset, intstatus = %04x \n",dev->name,intstatus) ;
1084 writew( GLOBAL_RESET, xl_mmio + MMIO_COMMAND ) ;
1085 printk(KERN_WARNING "%s: Resetting hardware: \n", dev->name);
1086 netif_stop_queue(dev) ;
1087 xl_freemem(dev) ;
1088 free_irq(dev->irq,dev);
1089 xl_reset(dev) ;
1090 writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1091 spin_unlock(&xl_priv->xl_lock) ;
1092 return IRQ_HANDLED;
1093 } /* Host Error */
1094
1095 if (intstatus & SRBRINT ) { /* Srbc interrupt */
1096 writel(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1097 if (xl_priv->srb_queued)
1098 xl_srb_bh(dev) ;
1099 } /* SRBR Interrupt */
1100
1101 if (intstatus & TXUNDERRUN) { /* Issue DnReset command */
1102 writel(DNRESET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1103 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) { /* Wait for command to run */
1104 /* !!! FIX-ME !!!!
1105 Must put a timeout check here ! */
1106 /* Empty Loop */
1107 }
1108 printk(KERN_WARNING "%s: TX Underrun received \n",dev->name) ;
1109 writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1110 } /* TxUnderRun */
1111
1112 if (intstatus & ARBCINT ) { /* Arbc interrupt */
1113 xl_arb_cmd(dev) ;
1114 } /* Arbc */
1115
1116 if (intstatus & ASBFINT) {
1117 if (xl_priv->asb_queued == 1) {
1118 xl_asb_cmd(dev) ;
1119 } else if (xl_priv->asb_queued == 2) {
1120 xl_asb_bh(dev) ;
1121 } else {
1122 writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
1123 }
1124 } /* Asbf */
1125
1126 if (intstatus & UPCOMPINT ) /* UpComplete */
1127 xl_rx(dev) ;
1128
1129 if (intstatus & DNCOMPINT ) /* DnComplete */
1130 xl_dn_comp(dev) ;
1131
1132 if (intstatus & HARDERRINT ) { /* Hardware error */
1133 writel(MMIO_WORD_READ | MACSTATUS, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1134 macstatus = readw(xl_mmio + MMIO_MACDATA) ;
1135 printk(KERN_WARNING "%s: MacStatusError, details: ", dev->name);
1136 if (macstatus & (1<<14))
1137 printk(KERN_WARNING "tchk error: Unrecoverable error \n") ;
1138 if (macstatus & (1<<3))
1139 printk(KERN_WARNING "eint error: Internal watchdog timer expired \n") ;
1140 if (macstatus & (1<<2))
1141 printk(KERN_WARNING "aint error: Host tried to perform invalid operation \n") ;
1142 printk(KERN_WARNING "Instatus = %02x, macstatus = %02x\n",intstatus,macstatus) ;
1143 printk(KERN_WARNING "%s: Resetting hardware: \n", dev->name);
1144 netif_stop_queue(dev) ;
1145 xl_freemem(dev) ;
1146 free_irq(dev->irq,dev);
1147 unregister_netdev(dev) ;
1148 free_netdev(dev) ;
1149 xl_reset(dev) ;
1150 writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1151 spin_unlock(&xl_priv->xl_lock) ;
1152 return IRQ_HANDLED;
1153 }
1154 } else {
1155 printk(KERN_WARNING "%s: Received Unknown interrupt : %04x \n", dev->name, intstatus) ;
1156 writel(ACK_INTERRUPT | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1157 }
1158 }
1159
1160 /* Turn interrupts back on */
1161
1162 writel( SETINDENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
1163 writel( SETINTENABLE | INT_MASK, xl_mmio + MMIO_COMMAND) ;
1164
1165 spin_unlock(&xl_priv->xl_lock) ;
1166 return IRQ_HANDLED;
1167 }
1168
1169 /*
1170 * Tx - Polling configuration
1171 */
1172
1173 static int xl_xmit(struct sk_buff *skb, struct net_device *dev)
1174 {
1175 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
1176 struct xl_tx_desc *txd ;
1177 int tx_head, tx_tail, tx_prev ;
1178 unsigned long flags ;
1179
1180 spin_lock_irqsave(&xl_priv->xl_lock,flags) ;
1181
1182 netif_stop_queue(dev) ;
1183
1184 if (xl_priv->free_ring_entries > 1 ) {
1185 /*
1186 * Set up the descriptor for the packet
1187 */
1188 tx_head = xl_priv->tx_ring_head ;
1189 tx_tail = xl_priv->tx_ring_tail ;
1190
1191 txd = &(xl_priv->xl_tx_ring[tx_head]) ;
1192 txd->dnnextptr = 0 ;
1193 txd->framestartheader = skb->len | TXDNINDICATE ;
1194 txd->buffer = pci_map_single(xl_priv->pdev, skb->data, skb->len, PCI_DMA_TODEVICE) ;
1195 txd->buffer_length = skb->len | TXDNFRAGLAST ;
1196 xl_priv->tx_ring_skb[tx_head] = skb ;
1197 xl_priv->xl_stats.tx_packets++ ;
1198 xl_priv->xl_stats.tx_bytes += skb->len ;
1199
1200 /*
1201 * Set the nextptr of the previous descriptor equal to this descriptor, add XL_TX_RING_SIZE -1
1202 * to ensure no negative numbers in unsigned locations.
1203 */
1204
1205 tx_prev = (xl_priv->tx_ring_head + XL_TX_RING_SIZE - 1) & (XL_TX_RING_SIZE - 1) ;
1206
1207 xl_priv->tx_ring_head++ ;
1208 xl_priv->tx_ring_head &= (XL_TX_RING_SIZE - 1) ;
1209 xl_priv->free_ring_entries-- ;
1210
1211 xl_priv->xl_tx_ring[tx_prev].dnnextptr = xl_priv->tx_ring_dma_addr + (sizeof (struct xl_tx_desc) * tx_head) ;
1212
1213 /* Sneaky, by doing a read on DnListPtr we can force the card to poll on the DnNextPtr */
1214 /* readl(xl_mmio + MMIO_DNLISTPTR) ; */
1215
1216 netif_wake_queue(dev) ;
1217
1218 spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ;
1219
1220 return 0;
1221 } else {
1222 spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ;
1223 return 1;
1224 }
1225
1226 }
1227
1228 /*
1229 * The NIC has told us that a packet has been downloaded onto the card, we must
1230 * find out which packet it has done, clear the skb and information for the packet
1231 * then advance around the ring for all tranmitted packets
1232 */
1233
1234 static void xl_dn_comp(struct net_device *dev)
1235 {
1236 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
1237 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1238 struct xl_tx_desc *txd ;
1239
1240
1241 if (xl_priv->tx_ring_tail == 255) {/* First time */
1242 xl_priv->xl_tx_ring[0].framestartheader = 0 ;
1243 xl_priv->xl_tx_ring[0].dnnextptr = 0 ;
1244 xl_priv->tx_ring_tail = 1 ;
1245 }
1246
1247 while (xl_priv->xl_tx_ring[xl_priv->tx_ring_tail].framestartheader & TXDNCOMPLETE ) {
1248 txd = &(xl_priv->xl_tx_ring[xl_priv->tx_ring_tail]) ;
1249 pci_unmap_single(xl_priv->pdev,txd->buffer, xl_priv->tx_ring_skb[xl_priv->tx_ring_tail]->len, PCI_DMA_TODEVICE) ;
1250 txd->framestartheader = 0 ;
1251 txd->buffer = 0xdeadbeef ;
1252 txd->buffer_length = 0 ;
1253 dev_kfree_skb_irq(xl_priv->tx_ring_skb[xl_priv->tx_ring_tail]) ;
1254 xl_priv->tx_ring_tail++ ;
1255 xl_priv->tx_ring_tail &= (XL_TX_RING_SIZE - 1) ;
1256 xl_priv->free_ring_entries++ ;
1257 }
1258
1259 netif_wake_queue(dev) ;
1260
1261 writel(ACK_INTERRUPT | DNCOMPACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
1262 }
1263
1264 /*
1265 * Close the adapter properly.
1266 * This srb reply cannot be handled from interrupt context as we have
1267 * to free the interrupt from the driver.
1268 */
1269
1270 static int xl_close(struct net_device *dev)
1271 {
1272 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1273 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1274 unsigned long t ;
1275
1276 netif_stop_queue(dev) ;
1277
1278 /*
1279 * Close the adapter, need to stall the rx and tx queues.
1280 */
1281
1282 writew(DNSTALL, xl_mmio + MMIO_COMMAND) ;
1283 t=jiffies;
1284 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1285 schedule();
1286 if(jiffies-t > 10*HZ) {
1287 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNSTALL not responding.\n", dev->name);
1288 break ;
1289 }
1290 }
1291 writew(DNDISABLE, xl_mmio + MMIO_COMMAND) ;
1292 t=jiffies;
1293 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1294 schedule();
1295 if(jiffies-t > 10*HZ) {
1296 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNDISABLE not responding.\n", dev->name);
1297 break ;
1298 }
1299 }
1300 writew(UPSTALL, xl_mmio + MMIO_COMMAND) ;
1301 t=jiffies;
1302 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1303 schedule();
1304 if(jiffies-t > 10*HZ) {
1305 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-UPSTALL not responding.\n", dev->name);
1306 break ;
1307 }
1308 }
1309
1310 /* Turn off interrupts, we will still get the indication though
1311 * so we can trap it
1312 */
1313
1314 writel(SETINTENABLE, xl_mmio + MMIO_COMMAND) ;
1315
1316 xl_srb_cmd(dev,CLOSE_NIC) ;
1317
1318 t=jiffies;
1319 while (!(readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_SRB)) {
1320 schedule();
1321 if(jiffies-t > 10*HZ) {
1322 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-CLOSENIC not responding.\n", dev->name);
1323 break ;
1324 }
1325 }
1326 /* Read the srb response from the adapter */
1327
1328 writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD);
1329 if (readb(xl_mmio + MMIO_MACDATA) != CLOSE_NIC) {
1330 printk(KERN_INFO "%s: CLOSE_NIC did not get a CLOSE_NIC response \n",dev->name) ;
1331 } else {
1332 writel((MEM_BYTE_READ | 0xd0000 | xl_priv->srb) +2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1333 if (readb(xl_mmio + MMIO_MACDATA)==0) {
1334 printk(KERN_INFO "%s: Adapter has been closed \n",dev->name) ;
1335 writew(ACK_INTERRUPT | SRBRACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1336
1337 xl_freemem(dev) ;
1338 free_irq(dev->irq,dev) ;
1339 } else {
1340 printk(KERN_INFO "%s: Close nic command returned error code %02x\n",dev->name, readb(xl_mmio + MMIO_MACDATA)) ;
1341 }
1342 }
1343
1344 /* Reset the upload and download logic */
1345
1346 writew(UPRESET, xl_mmio + MMIO_COMMAND) ;
1347 t=jiffies;
1348 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1349 schedule();
1350 if(jiffies-t > 10*HZ) {
1351 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-UPRESET not responding.\n", dev->name);
1352 break ;
1353 }
1354 }
1355 writew(DNRESET, xl_mmio + MMIO_COMMAND) ;
1356 t=jiffies;
1357 while (readw(xl_mmio + MMIO_INTSTATUS) & INTSTAT_CMD_IN_PROGRESS) {
1358 schedule();
1359 if(jiffies-t > 10*HZ) {
1360 printk(KERN_ERR "%s: 3COM 3C359 Velocity XL-DNRESET not responding.\n", dev->name);
1361 break ;
1362 }
1363 }
1364 xl_hw_reset(dev) ;
1365 return 0 ;
1366 }
1367
1368 static void xl_set_rx_mode(struct net_device *dev)
1369 {
1370 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1371 struct dev_mc_list *dmi ;
1372 unsigned char dev_mc_address[4] ;
1373 u16 options ;
1374 int i ;
1375
1376 if (dev->flags & IFF_PROMISC)
1377 options = 0x0004 ;
1378 else
1379 options = 0x0000 ;
1380
1381 if (options ^ xl_priv->xl_copy_all_options) { /* Changed, must send command */
1382 xl_priv->xl_copy_all_options = options ;
1383 xl_srb_cmd(dev, SET_RECEIVE_MODE) ;
1384 return ;
1385 }
1386
1387 dev_mc_address[0] = dev_mc_address[1] = dev_mc_address[2] = dev_mc_address[3] = 0 ;
1388
1389 for (i=0,dmi=dev->mc_list;i < dev->mc_count; i++,dmi = dmi->next) {
1390 dev_mc_address[0] |= dmi->dmi_addr[2] ;
1391 dev_mc_address[1] |= dmi->dmi_addr[3] ;
1392 dev_mc_address[2] |= dmi->dmi_addr[4] ;
1393 dev_mc_address[3] |= dmi->dmi_addr[5] ;
1394 }
1395
1396 if (memcmp(xl_priv->xl_functional_addr,dev_mc_address,4) != 0) { /* Options have changed, run the command */
1397 memcpy(xl_priv->xl_functional_addr, dev_mc_address,4) ;
1398 xl_srb_cmd(dev, SET_FUNC_ADDRESS) ;
1399 }
1400 return ;
1401 }
1402
1403
1404 /*
1405 * We issued an srb command and now we must read
1406 * the response from the completed command.
1407 */
1408
1409 static void xl_srb_bh(struct net_device *dev)
1410 {
1411 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1412 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1413 u8 srb_cmd, ret_code ;
1414 int i ;
1415
1416 writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1417 srb_cmd = readb(xl_mmio + MMIO_MACDATA) ;
1418 writel((MEM_BYTE_READ | 0xd0000 | xl_priv->srb) +2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1419 ret_code = readb(xl_mmio + MMIO_MACDATA) ;
1420
1421 /* Ret_code is standard across all commands */
1422
1423 switch (ret_code) {
1424 case 1:
1425 printk(KERN_INFO "%s: Command: %d - Invalid Command code\n",dev->name,srb_cmd) ;
1426 break ;
1427 case 4:
1428 printk(KERN_INFO "%s: Command: %d - Adapter is closed, must be open for this command \n",dev->name,srb_cmd) ;
1429 break ;
1430
1431 case 6:
1432 printk(KERN_INFO "%s: Command: %d - Options Invalid for command \n",dev->name,srb_cmd) ;
1433 break ;
1434
1435 case 0: /* Successful command execution */
1436 switch (srb_cmd) {
1437 case READ_LOG: /* Returns 14 bytes of data from the NIC */
1438 if(xl_priv->xl_message_level)
1439 printk(KERN_INFO "%s: READ.LOG 14 bytes of data ",dev->name) ;
1440 /*
1441 * We still have to read the log even if message_level = 0 and we don't want
1442 * to see it
1443 */
1444 for (i=0;i<14;i++) {
1445 writel(MEM_BYTE_READ | 0xd0000 | xl_priv->srb | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1446 if(xl_priv->xl_message_level)
1447 printk("%02x:",readb(xl_mmio + MMIO_MACDATA)) ;
1448 }
1449 printk("\n") ;
1450 break ;
1451 case SET_FUNC_ADDRESS:
1452 if(xl_priv->xl_message_level)
1453 printk(KERN_INFO "%s: Functional Address Set \n",dev->name) ;
1454 break ;
1455 case CLOSE_NIC:
1456 if(xl_priv->xl_message_level)
1457 printk(KERN_INFO "%s: Received CLOSE_NIC interrupt in interrupt handler \n",dev->name) ;
1458 break ;
1459 case SET_MULTICAST_MODE:
1460 if(xl_priv->xl_message_level)
1461 printk(KERN_INFO "%s: Multicast options successfully changed\n",dev->name) ;
1462 break ;
1463 case SET_RECEIVE_MODE:
1464 if(xl_priv->xl_message_level) {
1465 if (xl_priv->xl_copy_all_options == 0x0004)
1466 printk(KERN_INFO "%s: Entering promiscuous mode \n", dev->name) ;
1467 else
1468 printk(KERN_INFO "%s: Entering normal receive mode \n",dev->name) ;
1469 }
1470 break ;
1471
1472 } /* switch */
1473 break ;
1474 } /* switch */
1475 return ;
1476 }
1477
1478 static struct net_device_stats * xl_get_stats(struct net_device *dev)
1479 {
1480 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1481 return (struct net_device_stats *) &xl_priv->xl_stats;
1482 }
1483
1484 static int xl_set_mac_address (struct net_device *dev, void *addr)
1485 {
1486 struct sockaddr *saddr = addr ;
1487 struct xl_private *xl_priv = (struct xl_private *)dev->priv ;
1488
1489 if (netif_running(dev)) {
1490 printk(KERN_WARNING "%s: Cannot set mac/laa address while card is open\n", dev->name) ;
1491 return -EIO ;
1492 }
1493
1494 memcpy(xl_priv->xl_laa, saddr->sa_data,dev->addr_len) ;
1495
1496 if (xl_priv->xl_message_level) {
1497 printk(KERN_INFO "%s: MAC/LAA Set to = %x.%x.%x.%x.%x.%x\n",dev->name, xl_priv->xl_laa[0],
1498 xl_priv->xl_laa[1], xl_priv->xl_laa[2],
1499 xl_priv->xl_laa[3], xl_priv->xl_laa[4],
1500 xl_priv->xl_laa[5]);
1501 }
1502
1503 return 0 ;
1504 }
1505
1506 static void xl_arb_cmd(struct net_device *dev)
1507 {
1508 struct xl_private *xl_priv = (struct xl_private *) dev->priv;
1509 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1510 u8 arb_cmd ;
1511 u16 lan_status, lan_status_diff ;
1512
1513 writel( ( MEM_BYTE_READ | 0xD0000 | xl_priv->arb), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1514 arb_cmd = readb(xl_mmio + MMIO_MACDATA) ;
1515
1516 if (arb_cmd == RING_STATUS_CHANGE) { /* Ring.Status.Change */
1517 writel( ( (MEM_WORD_READ | 0xD0000 | xl_priv->arb) + 6), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1518
1519 printk(KERN_INFO "%s: Ring Status Change: New Status = %04x\n", dev->name, ntohs(readw(xl_mmio + MMIO_MACDATA) )) ;
1520
1521 lan_status = ntohs(readw(xl_mmio + MMIO_MACDATA));
1522
1523 /* Acknowledge interrupt, this tells nic we are done with the arb */
1524 writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1525
1526 lan_status_diff = xl_priv->xl_lan_status ^ lan_status ;
1527
1528 if (lan_status_diff & (LSC_LWF | LSC_ARW | LSC_FPE | LSC_RR) ) {
1529 if (lan_status_diff & LSC_LWF)
1530 printk(KERN_WARNING "%s: Short circuit detected on the lobe\n",dev->name);
1531 if (lan_status_diff & LSC_ARW)
1532 printk(KERN_WARNING "%s: Auto removal error\n",dev->name);
1533 if (lan_status_diff & LSC_FPE)
1534 printk(KERN_WARNING "%s: FDX Protocol Error\n",dev->name);
1535 if (lan_status_diff & LSC_RR)
1536 printk(KERN_WARNING "%s: Force remove MAC frame received\n",dev->name);
1537
1538 /* Adapter has been closed by the hardware */
1539
1540 netif_stop_queue(dev);
1541 xl_freemem(dev) ;
1542 free_irq(dev->irq,dev);
1543
1544 printk(KERN_WARNING "%s: Adapter has been closed \n", dev->name) ;
1545 } /* If serious error */
1546
1547 if (xl_priv->xl_message_level) {
1548 if (lan_status_diff & LSC_SIG_LOSS)
1549 printk(KERN_WARNING "%s: No receive signal detected \n", dev->name) ;
1550 if (lan_status_diff & LSC_HARD_ERR)
1551 printk(KERN_INFO "%s: Beaconing \n",dev->name);
1552 if (lan_status_diff & LSC_SOFT_ERR)
1553 printk(KERN_WARNING "%s: Adapter transmitted Soft Error Report Mac Frame \n",dev->name);
1554 if (lan_status_diff & LSC_TRAN_BCN)
1555 printk(KERN_INFO "%s: We are tranmitting the beacon, aaah\n",dev->name);
1556 if (lan_status_diff & LSC_SS)
1557 printk(KERN_INFO "%s: Single Station on the ring \n", dev->name);
1558 if (lan_status_diff & LSC_RING_REC)
1559 printk(KERN_INFO "%s: Ring recovery ongoing\n",dev->name);
1560 if (lan_status_diff & LSC_FDX_MODE)
1561 printk(KERN_INFO "%s: Operating in FDX mode\n",dev->name);
1562 }
1563
1564 if (lan_status_diff & LSC_CO) {
1565 if (xl_priv->xl_message_level)
1566 printk(KERN_INFO "%s: Counter Overflow \n", dev->name);
1567 /* Issue READ.LOG command */
1568 xl_srb_cmd(dev, READ_LOG) ;
1569 }
1570
1571 /* There is no command in the tech docs to issue the read_sr_counters */
1572 if (lan_status_diff & LSC_SR_CO) {
1573 if (xl_priv->xl_message_level)
1574 printk(KERN_INFO "%s: Source routing counters overflow\n", dev->name);
1575 }
1576
1577 xl_priv->xl_lan_status = lan_status ;
1578
1579 } /* Lan.change.status */
1580 else if ( arb_cmd == RECEIVE_DATA) { /* Received.Data */
1581 #if XL_DEBUG
1582 printk(KERN_INFO "Received.Data \n") ;
1583 #endif
1584 writel( ((MEM_WORD_READ | 0xD0000 | xl_priv->arb) + 6), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1585 xl_priv->mac_buffer = ntohs(readw(xl_mmio + MMIO_MACDATA)) ;
1586
1587 /* Now we are going to be really basic here and not do anything
1588 * with the data at all. The tech docs do not give me enough
1589 * information to calculate the buffers properly so we're
1590 * just going to tell the nic that we've dealt with the frame
1591 * anyway.
1592 */
1593
1594 dev->last_rx = jiffies ;
1595 /* Acknowledge interrupt, this tells nic we are done with the arb */
1596 writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK, xl_mmio + MMIO_COMMAND) ;
1597
1598 /* Is the ASB free ? */
1599
1600 xl_priv->asb_queued = 0 ;
1601 writel( ((MEM_BYTE_READ | 0xD0000 | xl_priv->asb) + 2), xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1602 if (readb(xl_mmio + MMIO_MACDATA) != 0xff) {
1603 xl_priv->asb_queued = 1 ;
1604
1605 xl_wait_misr_flags(dev) ;
1606
1607 writel(MEM_BYTE_WRITE | MF_ASBFR, xl_mmio + MMIO_MAC_ACCESS_CMD);
1608 writeb(0xff, xl_mmio + MMIO_MACDATA) ;
1609 writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1610 writeb(MISR_ASBFR, xl_mmio + MMIO_MACDATA) ;
1611 return ;
1612 /* Drop out and wait for the bottom half to be run */
1613 }
1614
1615 xl_asb_cmd(dev) ;
1616
1617 } else {
1618 printk(KERN_WARNING "%s: Received unknown arb (xl_priv) command: %02x \n",dev->name,arb_cmd) ;
1619 }
1620
1621 /* Acknowledge the arb interrupt */
1622
1623 writel(ACK_INTERRUPT | ARBCACK | LATCH_ACK , xl_mmio + MMIO_COMMAND) ;
1624
1625 return ;
1626 }
1627
1628
1629 /*
1630 * There is only one asb command, but we can get called from different
1631 * places.
1632 */
1633
1634 static void xl_asb_cmd(struct net_device *dev)
1635 {
1636 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1637 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1638
1639 if (xl_priv->asb_queued == 1)
1640 writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
1641
1642 writel(MEM_BYTE_WRITE | 0xd0000 | xl_priv->asb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1643 writeb(0x81, xl_mmio + MMIO_MACDATA) ;
1644
1645 writel(MEM_WORD_WRITE | 0xd0000 | xl_priv->asb | 6, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1646 writew(ntohs(xl_priv->mac_buffer), xl_mmio + MMIO_MACDATA) ;
1647
1648 xl_wait_misr_flags(dev) ;
1649
1650 writel(MEM_BYTE_WRITE | MF_RASB, xl_mmio + MMIO_MAC_ACCESS_CMD);
1651 writeb(0xff, xl_mmio + MMIO_MACDATA) ;
1652
1653 writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1654 writeb(MISR_RASB, xl_mmio + MMIO_MACDATA) ;
1655
1656 xl_priv->asb_queued = 2 ;
1657
1658 return ;
1659 }
1660
1661 /*
1662 * This will only get called if there was an error
1663 * from the asb cmd.
1664 */
1665 static void xl_asb_bh(struct net_device *dev)
1666 {
1667 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1668 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1669 u8 ret_code ;
1670
1671 writel(MMIO_BYTE_READ | 0xd0000 | xl_priv->asb | 2, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1672 ret_code = readb(xl_mmio + MMIO_MACDATA) ;
1673 switch (ret_code) {
1674 case 0x01:
1675 printk(KERN_INFO "%s: ASB Command, unrecognized command code \n",dev->name) ;
1676 break ;
1677 case 0x26:
1678 printk(KERN_INFO "%s: ASB Command, unexpected receive buffer \n", dev->name) ;
1679 break ;
1680 case 0x40:
1681 printk(KERN_INFO "%s: ASB Command, Invalid Station ID \n", dev->name) ;
1682 break ;
1683 }
1684 xl_priv->asb_queued = 0 ;
1685 writel(ACK_INTERRUPT | LATCH_ACK | ASBFACK, xl_mmio + MMIO_COMMAND) ;
1686 return ;
1687 }
1688
1689 /*
1690 * Issue srb commands to the nic
1691 */
1692
1693 static void xl_srb_cmd(struct net_device *dev, int srb_cmd)
1694 {
1695 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1696 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1697
1698 switch (srb_cmd) {
1699 case READ_LOG:
1700 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1701 writeb(READ_LOG, xl_mmio + MMIO_MACDATA) ;
1702 break;
1703
1704 case CLOSE_NIC:
1705 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1706 writeb(CLOSE_NIC, xl_mmio + MMIO_MACDATA) ;
1707 break ;
1708
1709 case SET_RECEIVE_MODE:
1710 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1711 writeb(SET_RECEIVE_MODE, xl_mmio + MMIO_MACDATA) ;
1712 writel(MEM_WORD_WRITE | 0xD0000 | xl_priv->srb | 4, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1713 writew(xl_priv->xl_copy_all_options, xl_mmio + MMIO_MACDATA) ;
1714 break ;
1715
1716 case SET_FUNC_ADDRESS:
1717 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1718 writeb(SET_FUNC_ADDRESS, xl_mmio + MMIO_MACDATA) ;
1719 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 6 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1720 writeb(xl_priv->xl_functional_addr[0], xl_mmio + MMIO_MACDATA) ;
1721 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 7 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1722 writeb(xl_priv->xl_functional_addr[1], xl_mmio + MMIO_MACDATA) ;
1723 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 8 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1724 writeb(xl_priv->xl_functional_addr[2], xl_mmio + MMIO_MACDATA) ;
1725 writel(MEM_BYTE_WRITE | 0xD0000 | xl_priv->srb | 9 , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1726 writeb(xl_priv->xl_functional_addr[3], xl_mmio + MMIO_MACDATA) ;
1727 break ;
1728 } /* switch */
1729
1730
1731 xl_wait_misr_flags(dev) ;
1732
1733 /* Write 0xff to the CSRB flag */
1734 writel(MEM_BYTE_WRITE | MF_CSRB , xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1735 writeb(0xFF, xl_mmio + MMIO_MACDATA) ;
1736 /* Set csrb bit in MISR register to process command */
1737 writel(MMIO_BYTE_WRITE | MISR_SET, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1738 writeb(MISR_CSRB, xl_mmio + MMIO_MACDATA) ;
1739 xl_priv->srb_queued = 1 ;
1740
1741 return ;
1742 }
1743
1744 /*
1745 * This is nasty, to use the MISR command you have to wait for 6 memory locations
1746 * to be zero. This is the way the driver does on other OS'es so we should be ok with
1747 * the empty loop.
1748 */
1749
1750 static void xl_wait_misr_flags(struct net_device *dev)
1751 {
1752 struct xl_private *xl_priv = (struct xl_private *) dev->priv ;
1753 u8 __iomem * xl_mmio = xl_priv->xl_mmio ;
1754
1755 int i ;
1756
1757 writel(MMIO_BYTE_READ | MISR_RW, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1758 if (readb(xl_mmio + MMIO_MACDATA) != 0) { /* Misr not clear */
1759 for (i=0; i<6; i++) {
1760 writel(MEM_BYTE_READ | 0xDFFE0 | i, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1761 while (readb(xl_mmio + MMIO_MACDATA) != 0 ) {} ; /* Empty Loop */
1762 }
1763 }
1764
1765 writel(MMIO_BYTE_WRITE | MISR_AND, xl_mmio + MMIO_MAC_ACCESS_CMD) ;
1766 writeb(0x80, xl_mmio + MMIO_MACDATA) ;
1767
1768 return ;
1769 }
1770
1771 /*
1772 * Change mtu size, this should work the same as olympic
1773 */
1774
1775 static int xl_change_mtu(struct net_device *dev, int mtu)
1776 {
1777 struct xl_private *xl_priv = (struct xl_private *) dev->priv;
1778 u16 max_mtu ;
1779
1780 if (xl_priv->xl_ring_speed == 4)
1781 max_mtu = 4500 ;
1782 else
1783 max_mtu = 18000 ;
1784
1785 if (mtu > max_mtu)
1786 return -EINVAL ;
1787 if (mtu < 100)
1788 return -EINVAL ;
1789
1790 dev->mtu = mtu ;
1791 xl_priv->pkt_buf_sz = mtu + TR_HLEN ;
1792
1793 return 0 ;
1794 }
1795
1796 static void __devexit xl_remove_one (struct pci_dev *pdev)
1797 {
1798 struct net_device *dev = pci_get_drvdata(pdev);
1799 struct xl_private *xl_priv=(struct xl_private *)dev->priv;
1800
1801 unregister_netdev(dev);
1802 iounmap(xl_priv->xl_mmio) ;
1803 pci_release_regions(pdev) ;
1804 pci_set_drvdata(pdev,NULL) ;
1805 free_netdev(dev);
1806 return ;
1807 }
1808
1809 static struct pci_driver xl_3c359_driver = {
1810 .name = "3c359",
1811 .id_table = xl_pci_tbl,
1812 .probe = xl_probe,
1813 .remove = __devexit_p(xl_remove_one),
1814 };
1815
1816 static int __init xl_pci_init (void)
1817 {
1818 return pci_module_init (&xl_3c359_driver);
1819 }
1820
1821
1822 static void __exit xl_pci_cleanup (void)
1823 {
1824 pci_unregister_driver (&xl_3c359_driver);
1825 }
1826
1827 module_init(xl_pci_init);
1828 module_exit(xl_pci_cleanup);
1829
1830 MODULE_LICENSE("GPL") ;
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