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21142.c
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1 /*
2  drivers/net/ethernet/dec/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. */
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 
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