Merge branch 'for-rmk' of git://source.mvista.com/git/linux-davinci-2.6.git
[linux-2.6] / 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         Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
11         for more information on this driver.
12         Please submit bugs to http://bugzilla.kernel.org/ .
13 */
14
15 #include <linux/delay.h>
16 #include "tulip.h"
17
18
19 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
20 u16 t21142_csr14[] =        { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
21 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
22
23
24 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
25    of available transceivers.  */
26 void t21142_media_task(struct work_struct *work)
27 {
28         struct tulip_private *tp =
29                 container_of(work, struct tulip_private, media_work);
30         struct net_device *dev = tp->dev;
31         void __iomem *ioaddr = tp->base_addr;
32         int csr12 = ioread32(ioaddr + CSR12);
33         int next_tick = 60*HZ;
34         int new_csr6 = 0;
35
36         if (tulip_debug > 2)
37                 printk(KERN_INFO"%s: 21143 negotiation status %8.8x, %s.\n",
38                            dev->name, csr12, medianame[dev->if_port]);
39         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
40                 if (tulip_check_duplex(dev) < 0) {
41                         netif_carrier_off(dev);
42                         next_tick = 3*HZ;
43                 } else {
44                         netif_carrier_on(dev);
45                         next_tick = 60*HZ;
46                 }
47         } else if (tp->nwayset) {
48                 /* Don't screw up a negotiated session! */
49                 if (tulip_debug > 1)
50                         printk(KERN_INFO"%s: Using NWay-set %s media, csr12 %8.8x.\n",
51                                    dev->name, medianame[dev->if_port], csr12);
52         } else if (tp->medialock) {
53                         ;
54         } else if (dev->if_port == 3) {
55                 if (csr12 & 2) {        /* No 100mbps link beat, revert to 10mbps. */
56                         if (tulip_debug > 1)
57                                 printk(KERN_INFO"%s: No 21143 100baseTx link beat, %8.8x, "
58                                            "trying NWay.\n", dev->name, csr12);
59                         t21142_start_nway(dev);
60                         next_tick = 3*HZ;
61                 }
62         } else if ((csr12 & 0x7000) != 0x5000) {
63                 /* Negotiation failed.  Search media types. */
64                 if (tulip_debug > 1)
65                         printk(KERN_INFO"%s: 21143 negotiation failed, status %8.8x.\n",
66                                    dev->name, csr12);
67                 if (!(csr12 & 4)) {             /* 10mbps link beat good. */
68                         new_csr6 = 0x82420000;
69                         dev->if_port = 0;
70                         iowrite32(0, ioaddr + CSR13);
71                         iowrite32(0x0003FFFF, ioaddr + CSR14);
72                         iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
73                         iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
74                 } else {
75                         /* Select 100mbps port to check for link beat. */
76                         new_csr6 = 0x83860000;
77                         dev->if_port = 3;
78                         iowrite32(0, ioaddr + CSR13);
79                         iowrite32(0x0003FF7F, ioaddr + CSR14);
80                         iowrite16(8, ioaddr + CSR15);
81                         iowrite32(1, ioaddr + CSR13);
82                 }
83                 if (tulip_debug > 1)
84                         printk(KERN_INFO"%s: Testing new 21143 media %s.\n",
85                                    dev->name, medianame[dev->if_port]);
86                 if (new_csr6 != (tp->csr6 & ~0x00D5)) {
87                         tp->csr6 &= 0x00D5;
88                         tp->csr6 |= new_csr6;
89                         iowrite32(0x0301, ioaddr + CSR12);
90                         tulip_restart_rxtx(tp);
91                 }
92                 next_tick = 3*HZ;
93         }
94
95         /* mod_timer synchronizes us with potential add_timer calls
96          * from interrupts.
97          */
98         mod_timer(&tp->timer, RUN_AT(next_tick));
99 }
100
101
102 void t21142_start_nway(struct net_device *dev)
103 {
104         struct tulip_private *tp = netdev_priv(dev);
105         void __iomem *ioaddr = tp->base_addr;
106         int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
107                 ((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
108
109         dev->if_port = 0;
110         tp->nway = tp->mediasense = 1;
111         tp->nwayset = tp->lpar = 0;
112         if (tulip_debug > 1)
113                 printk(KERN_DEBUG "%s: Restarting 21143 autonegotiation, csr14=%8.8x.\n",
114                            dev->name, csr14);
115         iowrite32(0x0001, ioaddr + CSR13);
116         udelay(100);
117         iowrite32(csr14, ioaddr + CSR14);
118         tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
119         iowrite32(tp->csr6, ioaddr + CSR6);
120         if (tp->mtable  &&  tp->mtable->csr15dir) {
121                 iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
122                 iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
123         } else
124                 iowrite16(0x0008, ioaddr + CSR15);
125         iowrite32(0x1301, ioaddr + CSR12);              /* Trigger NWAY. */
126 }
127
128
129
130 void t21142_lnk_change(struct net_device *dev, int csr5)
131 {
132         struct tulip_private *tp = netdev_priv(dev);
133         void __iomem *ioaddr = tp->base_addr;
134         int csr12 = ioread32(ioaddr + CSR12);
135
136         if (tulip_debug > 1)
137                 printk(KERN_INFO"%s: 21143 link status interrupt %8.8x, CSR5 %x, "
138                            "%8.8x.\n", dev->name, csr12, csr5, ioread32(ioaddr + CSR14));
139
140         /* If NWay finished and we have a negotiated partner capability. */
141         if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
142                 int setup_done = 0;
143                 int negotiated = tp->sym_advertise & (csr12 >> 16);
144                 tp->lpar = csr12 >> 16;
145                 tp->nwayset = 1;
146                 if (negotiated & 0x0100)                dev->if_port = 5;
147                 else if (negotiated & 0x0080)   dev->if_port = 3;
148                 else if (negotiated & 0x0040)   dev->if_port = 4;
149                 else if (negotiated & 0x0020)   dev->if_port = 0;
150                 else {
151                         tp->nwayset = 0;
152                         if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
153                                 dev->if_port = 3;
154                 }
155                 tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
156
157                 if (tulip_debug > 1) {
158                         if (tp->nwayset)
159                                 printk(KERN_INFO "%s: Switching to %s based on link "
160                                            "negotiation %4.4x & %4.4x = %4.4x.\n",
161                                            dev->name, medianame[dev->if_port], tp->sym_advertise,
162                                            tp->lpar, negotiated);
163                         else
164                                 printk(KERN_INFO "%s: Autonegotiation failed, using %s,"
165                                            " link beat status %4.4x.\n",
166                                            dev->name, medianame[dev->if_port], csr12);
167                 }
168
169                 if (tp->mtable) {
170                         int i;
171                         for (i = 0; i < tp->mtable->leafcount; i++)
172                                 if (tp->mtable->mleaf[i].media == dev->if_port) {
173                                         int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
174                                         tp->cur_index = i;
175                                         tulip_select_media(dev, startup);
176                                         setup_done = 1;
177                                         break;
178                                 }
179                 }
180                 if ( ! setup_done) {
181                         tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
182                         if (tp->full_duplex)
183                                 tp->csr6 |= 0x0200;
184                         iowrite32(1, ioaddr + CSR13);
185                 }
186 #if 0                                                   /* Restart shouldn't be needed. */
187                 iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
188                 if (tulip_debug > 2)
189                         printk(KERN_DEBUG "%s:  Restarting Tx and Rx, CSR5 is %8.8x.\n",
190                                    dev->name, ioread32(ioaddr + CSR5));
191 #endif
192                 tulip_start_rxtx(tp);
193                 if (tulip_debug > 2)
194                         printk(KERN_DEBUG "%s:  Setting CSR6 %8.8x/%x CSR12 %8.8x.\n",
195                                    dev->name, tp->csr6, ioread32(ioaddr + CSR6),
196                                    ioread32(ioaddr + CSR12));
197         } else if ((tp->nwayset  &&  (csr5 & 0x08000000)
198                                 && (dev->if_port == 3  ||  dev->if_port == 5)
199                                 && (csr12 & 2) == 2) ||
200                            (tp->nway && (csr5 & (TPLnkFail)))) {
201                 /* Link blew? Maybe restart NWay. */
202                 del_timer_sync(&tp->timer);
203                 t21142_start_nway(dev);
204                 tp->timer.expires = RUN_AT(3*HZ);
205                 add_timer(&tp->timer);
206         } else if (dev->if_port == 3  ||  dev->if_port == 5) {
207                 if (tulip_debug > 1)
208                         printk(KERN_INFO"%s: 21143 %s link beat %s.\n",
209                                    dev->name, medianame[dev->if_port],
210                                    (csr12 & 2) ? "failed" : "good");
211                 if ((csr12 & 2)  &&  ! tp->medialock) {
212                         del_timer_sync(&tp->timer);
213                         t21142_start_nway(dev);
214                         tp->timer.expires = RUN_AT(3*HZ);
215                         add_timer(&tp->timer);
216                 } else if (dev->if_port == 5)
217                         iowrite32(ioread32(ioaddr + CSR14) & ~0x080, ioaddr + CSR14);
218         } else if (dev->if_port == 0  ||  dev->if_port == 4) {
219                 if ((csr12 & 4) == 0)
220                         printk(KERN_INFO"%s: 21143 10baseT link beat good.\n",
221                                    dev->name);
222         } else if (!(csr12 & 4)) {              /* 10mbps link beat good. */
223                 if (tulip_debug)
224                         printk(KERN_INFO"%s: 21143 10mbps sensed media.\n",
225                                    dev->name);
226                 dev->if_port = 0;
227         } else if (tp->nwayset) {
228                 if (tulip_debug)
229                         printk(KERN_INFO"%s: 21143 using NWay-set %s, csr6 %8.8x.\n",
230                                    dev->name, medianame[dev->if_port], tp->csr6);
231         } else {                /* 100mbps link beat good. */
232                 if (tulip_debug)
233                         printk(KERN_INFO"%s: 21143 100baseTx sensed media.\n",
234                                    dev->name);
235                 dev->if_port = 3;
236                 tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
237                 iowrite32(0x0003FF7F, ioaddr + CSR14);
238                 iowrite32(0x0301, ioaddr + CSR12);
239                 tulip_restart_rxtx(tp);
240         }
241 }
242
243