doc: fix broken references
[linux-2.6.git] / drivers / net / tulip / 21142.c
1 /*
2         drivers/net/tulip/21142.c
3
4         Copyright 2000,2001  The Linux Kernel Team
5         Written/copyright 1994-2001 by Donald Becker.
6
7         This software may be used and distributed according to the terms
8         of the GNU General Public License, incorporated herein by reference.
9
10         DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
11         Hardware Reference Manual" is currently available at :
12         http://developer.intel.com/design/network/manuals/278074.htm
13
14         Please submit bugs to http://bugzilla.kernel.org/ .
15 */
16
17 #include <linux/delay.h>
18 #include "tulip.h"
19
20
21 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
22 u16 t21142_csr14[] =        { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
23 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
24
25
26 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
27    of available transceivers.  */
28 void t21142_media_task(struct work_struct *work)
29 {
30         struct tulip_private *tp =
31                 container_of(work, struct tulip_private, media_work);
32         struct net_device *dev = tp->dev;
33         void __iomem *ioaddr = tp->base_addr;
34         int csr12 = ioread32(ioaddr + CSR12);
35         int next_tick = 60*HZ;
36         int new_csr6 = 0;
37         int csr14 = ioread32(ioaddr + CSR14);
38
39         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
40         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
41                 csr12 |= 6;
42         if (tulip_debug > 2)
43                 dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
44                          csr12, medianame[dev->if_port]);
45         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
46                 if (tulip_check_duplex(dev) < 0) {
47                         netif_carrier_off(dev);
48                         next_tick = 3*HZ;
49                 } else {
50                         netif_carrier_on(dev);
51                         next_tick = 60*HZ;
52                 }
53         } else if (tp->nwayset) {
54                 /* Don't screw up a negotiated session! */
55                 if (tulip_debug > 1)
56                         dev_info(&dev->dev,
57                                  "Using NWay-set %s media, csr12 %08x\n",
58                                  medianame[dev->if_port], csr12);
59         } else if (tp->medialock) {
60                         ;
61         } else if (dev->if_port == 3) {
62                 if (csr12 & 2) {        /* No 100mbps link beat, revert to 10mbps. */
63                         if (tulip_debug > 1)
64                                 dev_info(&dev->dev,
65                                          "No 21143 100baseTx link beat, %08x, trying NWay\n",
66                                          csr12);
67                         t21142_start_nway(dev);
68                         next_tick = 3*HZ;
69                 }
70         } else if ((csr12 & 0x7000) != 0x5000) {
71                 /* Negotiation failed.  Search media types. */
72                 if (tulip_debug > 1)
73                         dev_info(&dev->dev,
74                                  "21143 negotiation failed, status %08x\n",
75                                  csr12);
76                 if (!(csr12 & 4)) {             /* 10mbps link beat good. */
77                         new_csr6 = 0x82420000;
78                         dev->if_port = 0;
79                         iowrite32(0, ioaddr + CSR13);
80                         iowrite32(0x0003FFFF, ioaddr + CSR14);
81                         iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
82                         iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
83                 } else {
84                         /* Select 100mbps port to check for link beat. */
85                         new_csr6 = 0x83860000;
86                         dev->if_port = 3;
87                         iowrite32(0, ioaddr + CSR13);
88                         iowrite32(0x0003FFFF, ioaddr + CSR14);
89                         iowrite16(8, ioaddr + CSR15);
90                         iowrite32(1, ioaddr + CSR13);
91                 }
92                 if (tulip_debug > 1)
93                         dev_info(&dev->dev, "Testing new 21143 media %s\n",
94                                  medianame[dev->if_port]);
95                 if (new_csr6 != (tp->csr6 & ~0x00D5)) {
96                         tp->csr6 &= 0x00D5;
97                         tp->csr6 |= new_csr6;
98                         iowrite32(0x0301, ioaddr + CSR12);
99                         tulip_restart_rxtx(tp);
100                 }
101                 next_tick = 3*HZ;
102         }
103
104         /* mod_timer synchronizes us with potential add_timer calls
105          * from interrupts.
106          */
107         mod_timer(&tp->timer, RUN_AT(next_tick));
108 }
109
110
111 void t21142_start_nway(struct net_device *dev)
112 {
113         struct tulip_private *tp = netdev_priv(dev);
114         void __iomem *ioaddr = tp->base_addr;
115         int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
116                 ((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
117
118         dev->if_port = 0;
119         tp->nway = tp->mediasense = 1;
120         tp->nwayset = tp->lpar = 0;
121         if (tulip_debug > 1)
122                 netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
123                            csr14);
124         iowrite32(0x0001, ioaddr + CSR13);
125         udelay(100);
126         iowrite32(csr14, ioaddr + CSR14);
127         tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
128         iowrite32(tp->csr6, ioaddr + CSR6);
129         if (tp->mtable  &&  tp->mtable->csr15dir) {
130                 iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
131                 iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
132         } else
133                 iowrite16(0x0008, ioaddr + CSR15);
134         iowrite32(0x1301, ioaddr + CSR12);              /* Trigger NWAY. */
135 }
136
137
138
139 void t21142_lnk_change(struct net_device *dev, int csr5)
140 {
141         struct tulip_private *tp = netdev_priv(dev);
142         void __iomem *ioaddr = tp->base_addr;
143         int csr12 = ioread32(ioaddr + CSR12);
144         int csr14 = ioread32(ioaddr + CSR14);
145
146         /* CSR12[LS10,LS100] are not reliable during autonegotiation */
147         if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
148                 csr12 |= 6;
149         if (tulip_debug > 1)
150                 dev_info(&dev->dev,
151                          "21143 link status interrupt %08x, CSR5 %x, %08x\n",
152                          csr12, csr5, csr14);
153
154         /* If NWay finished and we have a negotiated partner capability. */
155         if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
156                 int setup_done = 0;
157                 int negotiated = tp->sym_advertise & (csr12 >> 16);
158                 tp->lpar = csr12 >> 16;
159                 tp->nwayset = 1;
160                 /* If partner cannot negotiate, it is 10Mbps Half Duplex */
161                 if (!(csr12 & 0x8000))          dev->if_port = 0;
162                 else if (negotiated & 0x0100)   dev->if_port = 5;
163                 else if (negotiated & 0x0080)   dev->if_port = 3;
164                 else if (negotiated & 0x0040)   dev->if_port = 4;
165                 else if (negotiated & 0x0020)   dev->if_port = 0;
166                 else {
167                         tp->nwayset = 0;
168                         if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
169                                 dev->if_port = 3;
170                 }
171                 tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
172
173                 if (tulip_debug > 1) {
174                         if (tp->nwayset)
175                                 dev_info(&dev->dev,
176                                          "Switching to %s based on link negotiation %04x & %04x = %04x\n",
177                                          medianame[dev->if_port],
178                                          tp->sym_advertise, tp->lpar,
179                                          negotiated);
180                         else
181                                 dev_info(&dev->dev,
182                                          "Autonegotiation failed, using %s, link beat status %04x\n",
183                                          medianame[dev->if_port], csr12);
184                 }
185
186                 if (tp->mtable) {
187                         int i;
188                         for (i = 0; i < tp->mtable->leafcount; i++)
189                                 if (tp->mtable->mleaf[i].media == dev->if_port) {
190                                         int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
191                                         tp->cur_index = i;
192                                         tulip_select_media(dev, startup);
193                                         setup_done = 1;
194                                         break;
195                                 }
196                 }
197                 if ( ! setup_done) {
198                         tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
199                         if (tp->full_duplex)
200                                 tp->csr6 |= 0x0200;
201                         iowrite32(1, ioaddr + CSR13);
202                 }
203 #if 0                                                   /* Restart shouldn't be needed. */
204                 iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
205                 if (tulip_debug > 2)
206                         netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
207                                    ioread32(ioaddr + CSR5));
208 #endif
209                 tulip_start_rxtx(tp);
210                 if (tulip_debug > 2)
211                         netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
212                                    tp->csr6, ioread32(ioaddr + CSR6),
213                                    ioread32(ioaddr + CSR12));
214         } else if ((tp->nwayset  &&  (csr5 & 0x08000000) &&
215                     (dev->if_port == 3  ||  dev->if_port == 5) &&
216                     (csr12 & 2) == 2) ||
217                    (tp->nway && (csr5 & (TPLnkFail)))) {
218                 /* Link blew? Maybe restart NWay. */
219                 del_timer_sync(&tp->timer);
220                 t21142_start_nway(dev);
221                 tp->timer.expires = RUN_AT(3*HZ);
222                 add_timer(&tp->timer);
223         } else if (dev->if_port == 3  ||  dev->if_port == 5) {
224                 if (tulip_debug > 1)
225                         dev_info(&dev->dev, "21143 %s link beat %s\n",
226                                  medianame[dev->if_port],
227                                  (csr12 & 2) ? "failed" : "good");
228                 if ((csr12 & 2)  &&  ! tp->medialock) {
229                         del_timer_sync(&tp->timer);
230                         t21142_start_nway(dev);
231                         tp->timer.expires = RUN_AT(3*HZ);
232                         add_timer(&tp->timer);
233                 } else if (dev->if_port == 5)
234                         iowrite32(csr14 & ~0x080, ioaddr + CSR14);
235         } else if (dev->if_port == 0  ||  dev->if_port == 4) {
236                 if ((csr12 & 4) == 0)
237                         dev_info(&dev->dev, "21143 10baseT link beat good\n");
238         } else if (!(csr12 & 4)) {              /* 10mbps link beat good. */
239                 if (tulip_debug)
240                         dev_info(&dev->dev, "21143 10mbps sensed media\n");
241                 dev->if_port = 0;
242         } else if (tp->nwayset) {
243                 if (tulip_debug)
244                         dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
245                                  medianame[dev->if_port], tp->csr6);
246         } else {                /* 100mbps link beat good. */
247                 if (tulip_debug)
248                         dev_info(&dev->dev, "21143 100baseTx sensed media\n");
249                 dev->if_port = 3;
250                 tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
251                 iowrite32(0x0003FF7F, ioaddr + CSR14);
252                 iowrite32(0x0301, ioaddr + CSR12);
253                 tulip_restart_rxtx(tp);
254         }
255 }
256
257