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1da177e4 LT |
1 | /* |
2 | drivers/net/tulip/pnic2.c | |
3 | ||
1da177e4 LT |
4 | Copyright 2000,2001 The Linux Kernel Team |
5 | Written/copyright 1994-2001 by Donald Becker. | |
6 | Modified to hep support PNIC_II by Kevin B. Hendricks | |
7 | ||
8 | This software may be used and distributed according to the terms | |
9 | of the GNU General Public License, incorporated herein by reference. | |
10 | ||
11 | Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html} | |
78a65518 | 12 | for more information on this driver. |
1da177e4 | 13 | |
78a65518 | 14 | Please submit bugs to http://bugzilla.kernel.org/ . |
1da177e4 LT |
15 | */ |
16 | ||
17 | ||
18 | /* Understanding the PNIC_II - everything is this file is based | |
19 | * on the PNIC_II_PDF datasheet which is sorely lacking in detail | |
20 | * | |
21 | * As I understand things, here are the registers and bits that | |
22 | * explain the masks and constants used in this file that are | |
23 | * either different from the 21142/3 or important for basic operation. | |
24 | * | |
25 | * | |
26 | * CSR 6 (mask = 0xfe3bd1fd of bits not to change) | |
27 | * ----- | |
28 | * Bit 24 - SCR | |
29 | * Bit 23 - PCS | |
30 | * Bit 22 - TTM (Trasmit Threshold Mode) | |
31 | * Bit 18 - Port Select | |
32 | * Bit 13 - Start - 1, Stop - 0 Transmissions | |
33 | * Bit 11:10 - Loop Back Operation Mode | |
34 | * Bit 9 - Full Duplex mode (Advertise 10BaseT-FD is CSR14<7> is set) | |
35 | * Bit 1 - Start - 1, Stop - 0 Receive | |
36 | * | |
37 | * | |
38 | * CSR 14 (mask = 0xfff0ee39 of bits not to change) | |
39 | * ------ | |
40 | * Bit 19 - PAUSE-Pause | |
41 | * Bit 18 - Advertise T4 | |
42 | * Bit 17 - Advertise 100baseTx-FD | |
43 | * Bit 16 - Advertise 100baseTx-HD | |
44 | * Bit 12 - LTE - Link Test Enable | |
45 | * Bit 7 - ANE - Auto Negotiate Enable | |
46 | * Bit 6 - HDE - Advertise 10baseT-HD | |
47 | * Bit 2 - Reset to Power down - kept as 1 for normal operation | |
48 | * Bit 1 - Loop Back enable for 10baseT MCC | |
49 | * | |
50 | * | |
51 | * CSR 12 | |
52 | * ------ | |
53 | * Bit 25 - Partner can do T4 | |
54 | * Bit 24 - Partner can do 100baseTx-FD | |
55 | * Bit 23 - Partner can do 100baseTx-HD | |
56 | * Bit 22 - Partner can do 10baseT-FD | |
57 | * Bit 21 - Partner can do 10baseT-HD | |
58 | * Bit 15 - LPN is 1 if all above bits are valid other wise 0 | |
59 | * Bit 14:12 - autonegotiation state (write 001 to start autonegotiate) | |
60 | * Bit 3 - Autopolarity state | |
61 | * Bit 2 - LS10B - link state of 10baseT 0 - good, 1 - failed | |
62 | * Bit 1 - LS100B - link state of 100baseT 0 - good, 1- faild | |
63 | * | |
64 | * | |
65 | * Data Port Selection Info | |
66 | *------------------------- | |
67 | * | |
68 | * CSR14<7> CSR6<18> CSR6<22> CSR6<23> CSR6<24> MODE/PORT | |
69 | * 1 0 0 (X) 0 (X) 1 NWAY | |
70 | * 0 0 1 0 (X) 0 10baseT | |
71 | * 0 1 0 1 1 (X) 100baseT | |
72 | * | |
73 | * | |
74 | */ | |
75 | ||
76 | ||
77 | ||
1da177e4 LT |
78 | #include "tulip.h" |
79 | #include <linux/delay.h> | |
80 | ||
81 | ||
82 | void pnic2_timer(unsigned long data) | |
83 | { | |
84 | struct net_device *dev = (struct net_device *)data; | |
85 | struct tulip_private *tp = netdev_priv(dev); | |
86 | void __iomem *ioaddr = tp->base_addr; | |
87 | int next_tick = 60*HZ; | |
88 | ||
89 | if (tulip_debug > 3) | |
90 | printk(KERN_INFO"%s: PNIC2 negotiation status %8.8x.\n", | |
91 | dev->name,ioread32(ioaddr + CSR12)); | |
92 | ||
93 | if (next_tick) { | |
94 | mod_timer(&tp->timer, RUN_AT(next_tick)); | |
95 | } | |
96 | } | |
97 | ||
98 | ||
99 | void pnic2_start_nway(struct net_device *dev) | |
100 | { | |
101 | struct tulip_private *tp = netdev_priv(dev); | |
102 | void __iomem *ioaddr = tp->base_addr; | |
103 | int csr14; | |
104 | int csr12; | |
105 | ||
106 | /* set up what to advertise during the negotiation */ | |
107 | ||
108 | /* load in csr14 and mask off bits not to touch | |
109 | * comment at top of file explains mask value | |
110 | */ | |
111 | csr14 = (ioread32(ioaddr + CSR14) & 0xfff0ee39); | |
112 | ||
113 | /* bit 17 - advetise 100baseTx-FD */ | |
114 | if (tp->sym_advertise & 0x0100) csr14 |= 0x00020000; | |
115 | ||
116 | /* bit 16 - advertise 100baseTx-HD */ | |
117 | if (tp->sym_advertise & 0x0080) csr14 |= 0x00010000; | |
118 | ||
119 | /* bit 6 - advertise 10baseT-HD */ | |
120 | if (tp->sym_advertise & 0x0020) csr14 |= 0x00000040; | |
121 | ||
122 | /* Now set bit 12 Link Test Enable, Bit 7 Autonegotiation Enable | |
123 | * and bit 0 Don't PowerDown 10baseT | |
124 | */ | |
125 | csr14 |= 0x00001184; | |
126 | ||
127 | if (tulip_debug > 1) | |
128 | printk(KERN_DEBUG "%s: Restarting PNIC2 autonegotiation, " | |
129 | "csr14=%8.8x.\n", dev->name, csr14); | |
130 | ||
131 | /* tell pnic2_lnk_change we are doing an nway negotiation */ | |
132 | dev->if_port = 0; | |
133 | tp->nway = tp->mediasense = 1; | |
134 | tp->nwayset = tp->lpar = 0; | |
135 | ||
136 | /* now we have to set up csr6 for NWAY state */ | |
137 | ||
138 | tp->csr6 = ioread32(ioaddr + CSR6); | |
139 | if (tulip_debug > 1) | |
140 | printk(KERN_DEBUG "%s: On Entry to Nway, " | |
141 | "csr6=%8.8x.\n", dev->name, tp->csr6); | |
142 | ||
143 | /* mask off any bits not to touch | |
144 | * comment at top of file explains mask value | |
145 | */ | |
146 | tp->csr6 = tp->csr6 & 0xfe3bd1fd; | |
147 | ||
148 | /* don't forget that bit 9 is also used for advertising */ | |
149 | /* advertise 10baseT-FD for the negotiation (bit 9) */ | |
150 | if (tp->sym_advertise & 0x0040) tp->csr6 |= 0x00000200; | |
151 | ||
152 | /* set bit 24 for nway negotiation mode ... | |
153 | * see Data Port Selection comment at top of file | |
154 | * and "Stop" - reset both Transmit (bit 13) and Receive (bit 1) | |
155 | */ | |
156 | tp->csr6 |= 0x01000000; | |
157 | iowrite32(csr14, ioaddr + CSR14); | |
158 | iowrite32(tp->csr6, ioaddr + CSR6); | |
159 | udelay(100); | |
160 | ||
161 | /* all set up so now force the negotiation to begin */ | |
162 | ||
163 | /* read in current values and mask off all but the | |
164 | * Autonegotiation bits 14:12. Writing a 001 to those bits | |
165 | * should start the autonegotiation | |
166 | */ | |
167 | csr12 = (ioread32(ioaddr + CSR12) & 0xffff8fff); | |
168 | csr12 |= 0x1000; | |
169 | iowrite32(csr12, ioaddr + CSR12); | |
170 | } | |
171 | ||
172 | ||
173 | ||
174 | void pnic2_lnk_change(struct net_device *dev, int csr5) | |
175 | { | |
176 | struct tulip_private *tp = netdev_priv(dev); | |
177 | void __iomem *ioaddr = tp->base_addr; | |
178 | int csr14; | |
179 | ||
180 | /* read the staus register to find out what is up */ | |
181 | int csr12 = ioread32(ioaddr + CSR12); | |
182 | ||
183 | if (tulip_debug > 1) | |
184 | printk(KERN_INFO"%s: PNIC2 link status interrupt %8.8x, " | |
185 | " CSR5 %x, %8.8x.\n", dev->name, csr12, | |
186 | csr5, ioread32(ioaddr + CSR14)); | |
187 | ||
188 | /* If NWay finished and we have a negotiated partner capability. | |
189 | * check bits 14:12 for bit pattern 101 - all is good | |
190 | */ | |
191 | if (tp->nway && !tp->nwayset) { | |
192 | ||
193 | /* we did an auto negotiation */ | |
194 | ||
195 | if ((csr12 & 0x7000) == 0x5000) { | |
196 | ||
197 | /* negotiation ended successfully */ | |
198 | ||
199 | /* get the link partners reply and mask out all but | |
7f927fcc | 200 | * bits 24-21 which show the partners capabilities |
1da177e4 LT |
201 | * and match those to what we advertised |
202 | * | |
203 | * then begin to interpret the results of the negotiation. | |
204 | * Always go in this order : (we are ignoring T4 for now) | |
205 | * 100baseTx-FD, 100baseTx-HD, 10baseT-FD, 10baseT-HD | |
206 | */ | |
207 | ||
208 | int negotiated = ((csr12 >> 16) & 0x01E0) & tp->sym_advertise; | |
209 | tp->lpar = (csr12 >> 16); | |
210 | tp->nwayset = 1; | |
211 | ||
212 | if (negotiated & 0x0100) dev->if_port = 5; | |
213 | else if (negotiated & 0x0080) dev->if_port = 3; | |
214 | else if (negotiated & 0x0040) dev->if_port = 4; | |
215 | else if (negotiated & 0x0020) dev->if_port = 0; | |
216 | else { | |
217 | if (tulip_debug > 1) | |
218 | printk(KERN_INFO "%s: funny autonegotiate result " | |
219 | "csr12 %8.8x advertising %4.4x\n", | |
220 | dev->name, csr12, tp->sym_advertise); | |
221 | tp->nwayset = 0; | |
222 | /* so check if 100baseTx link state is okay */ | |
223 | if ((csr12 & 2) == 0 && (tp->sym_advertise & 0x0180)) | |
224 | dev->if_port = 3; | |
225 | } | |
226 | ||
227 | /* now record the duplex that was negotiated */ | |
228 | tp->full_duplex = 0; | |
229 | if ((dev->if_port == 4) || (dev->if_port == 5)) | |
230 | tp->full_duplex = 1; | |
231 | ||
232 | if (tulip_debug > 1) { | |
233 | if (tp->nwayset) | |
234 | printk(KERN_INFO "%s: Switching to %s based on link " | |
235 | "negotiation %4.4x & %4.4x = %4.4x.\n", | |
236 | dev->name, medianame[dev->if_port], | |
237 | tp->sym_advertise, tp->lpar, negotiated); | |
238 | } | |
239 | ||
240 | /* remember to turn off bit 7 - autonegotiate | |
241 | * enable so we can properly end nway mode and | |
242 | * set duplex (ie. use csr6<9> again) | |
243 | */ | |
244 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); | |
245 | iowrite32(csr14,ioaddr + CSR14); | |
246 | ||
247 | ||
248 | /* now set the data port and operating mode | |
249 | * (see the Data Port Selection comments at | |
250 | * the top of the file | |
251 | */ | |
252 | ||
253 | /* get current csr6 and mask off bits not to touch */ | |
254 | /* see comment at top of file */ | |
255 | ||
256 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); | |
257 | ||
258 | /* so if using if_port 3 or 5 then select the 100baseT | |
259 | * port else select the 10baseT port. | |
260 | * See the Data Port Selection table at the top | |
261 | * of the file which was taken from the PNIC_II.PDF | |
262 | * datasheet | |
263 | */ | |
264 | if (dev->if_port & 1) tp->csr6 |= 0x01840000; | |
265 | else tp->csr6 |= 0x00400000; | |
266 | ||
267 | /* now set the full duplex bit appropriately */ | |
268 | if (tp->full_duplex) tp->csr6 |= 0x00000200; | |
269 | ||
270 | iowrite32(1, ioaddr + CSR13); | |
271 | ||
272 | if (tulip_debug > 2) | |
273 | printk(KERN_DEBUG "%s: Setting CSR6 %8.8x/%x CSR12 " | |
274 | "%8.8x.\n", dev->name, tp->csr6, | |
275 | ioread32(ioaddr + CSR6), ioread32(ioaddr + CSR12)); | |
276 | ||
277 | /* now the following actually writes out the | |
278 | * new csr6 values | |
279 | */ | |
280 | tulip_start_rxtx(tp); | |
281 | ||
282 | return; | |
283 | ||
284 | } else { | |
285 | printk(KERN_INFO "%s: Autonegotiation failed, " | |
286 | "using %s, link beat status %4.4x.\n", | |
287 | dev->name, medianame[dev->if_port], csr12); | |
288 | ||
289 | /* remember to turn off bit 7 - autonegotiate | |
290 | * enable so we don't forget | |
291 | */ | |
292 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); | |
293 | iowrite32(csr14,ioaddr + CSR14); | |
294 | ||
295 | /* what should we do when autonegotiate fails? | |
296 | * should we try again or default to baseline | |
297 | * case. I just don't know. | |
298 | * | |
299 | * for now default to some baseline case | |
300 | */ | |
301 | ||
302 | dev->if_port = 0; | |
303 | tp->nway = 0; | |
304 | tp->nwayset = 1; | |
305 | ||
306 | /* set to 10baseTx-HD - see Data Port Selection | |
307 | * comment given at the top of the file | |
308 | */ | |
309 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); | |
310 | tp->csr6 |= 0x00400000; | |
311 | ||
312 | tulip_restart_rxtx(tp); | |
313 | ||
314 | return; | |
315 | ||
316 | } | |
317 | } | |
318 | ||
8e95a202 JP |
319 | if ((tp->nwayset && (csr5 & 0x08000000) && |
320 | (dev->if_port == 3 || dev->if_port == 5) && | |
321 | (csr12 & 2) == 2) || (tp->nway && (csr5 & (TPLnkFail)))) { | |
1da177e4 LT |
322 | |
323 | /* Link blew? Maybe restart NWay. */ | |
324 | ||
325 | if (tulip_debug > 2) | |
326 | printk(KERN_DEBUG "%s: Ugh! Link blew?\n", dev->name); | |
327 | ||
328 | del_timer_sync(&tp->timer); | |
329 | pnic2_start_nway(dev); | |
330 | tp->timer.expires = RUN_AT(3*HZ); | |
331 | add_timer(&tp->timer); | |
332 | ||
333 | return; | |
334 | } | |
335 | ||
336 | ||
337 | if (dev->if_port == 3 || dev->if_port == 5) { | |
338 | ||
339 | /* we are at 100mb and a potential link change occurred */ | |
340 | ||
341 | if (tulip_debug > 1) | |
342 | printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", | |
343 | dev->name, medianame[dev->if_port], | |
344 | (csr12 & 2) ? "failed" : "good"); | |
345 | ||
346 | /* check 100 link beat */ | |
347 | ||
348 | tp->nway = 0; | |
349 | tp->nwayset = 1; | |
350 | ||
351 | /* if failed then try doing an nway to get in sync */ | |
352 | if ((csr12 & 2) && ! tp->medialock) { | |
353 | del_timer_sync(&tp->timer); | |
354 | pnic2_start_nway(dev); | |
355 | tp->timer.expires = RUN_AT(3*HZ); | |
356 | add_timer(&tp->timer); | |
357 | } | |
358 | ||
359 | return; | |
360 | } | |
361 | ||
362 | if (dev->if_port == 0 || dev->if_port == 4) { | |
363 | ||
364 | /* we are at 10mb and a potential link change occurred */ | |
365 | ||
366 | if (tulip_debug > 1) | |
367 | printk(KERN_INFO"%s: PNIC2 %s link beat %s.\n", | |
368 | dev->name, medianame[dev->if_port], | |
369 | (csr12 & 4) ? "failed" : "good"); | |
370 | ||
371 | ||
372 | tp->nway = 0; | |
373 | tp->nwayset = 1; | |
374 | ||
375 | /* if failed, try doing an nway to get in sync */ | |
376 | if ((csr12 & 4) && ! tp->medialock) { | |
377 | del_timer_sync(&tp->timer); | |
378 | pnic2_start_nway(dev); | |
379 | tp->timer.expires = RUN_AT(3*HZ); | |
380 | add_timer(&tp->timer); | |
381 | } | |
382 | ||
383 | return; | |
384 | } | |
385 | ||
386 | ||
387 | if (tulip_debug > 1) | |
388 | printk(KERN_INFO"%s: PNIC2 Link Change Default?\n",dev->name); | |
389 | ||
390 | /* if all else fails default to trying 10baseT-HD */ | |
391 | dev->if_port = 0; | |
392 | ||
393 | /* make sure autonegotiate enable is off */ | |
394 | csr14 = (ioread32(ioaddr + CSR14) & 0xffffff7f); | |
395 | iowrite32(csr14,ioaddr + CSR14); | |
396 | ||
397 | /* set to 10baseTx-HD - see Data Port Selection | |
398 | * comment given at the top of the file | |
399 | */ | |
400 | tp->csr6 = (ioread32(ioaddr + CSR6) & 0xfe3bd1fd); | |
401 | tp->csr6 |= 0x00400000; | |
402 | ||
403 | tulip_restart_rxtx(tp); | |
404 | } | |
405 |