doc: fix broken references
[linux-2.6.git] / drivers / net / tulip / pnic.c
1 /*
2         drivers/net/tulip/pnic.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 submit bugs to http://bugzilla.kernel.org/ .
11 */
12
13 #include <linux/interrupt.h>
14 #include <linux/kernel.h>
15 #include <linux/jiffies.h>
16 #include "tulip.h"
17
18
19 void pnic_do_nway(struct net_device *dev)
20 {
21         struct tulip_private *tp = netdev_priv(dev);
22         void __iomem *ioaddr = tp->base_addr;
23         u32 phy_reg = ioread32(ioaddr + 0xB8);
24         u32 new_csr6 = tp->csr6 & ~0x40C40200;
25
26         if (phy_reg & 0x78000000) { /* Ignore baseT4 */
27                 if (phy_reg & 0x20000000)               dev->if_port = 5;
28                 else if (phy_reg & 0x40000000)  dev->if_port = 3;
29                 else if (phy_reg & 0x10000000)  dev->if_port = 4;
30                 else if (phy_reg & 0x08000000)  dev->if_port = 0;
31                 tp->nwayset = 1;
32                 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
33                 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
34                 if (dev->if_port & 1)
35                         iowrite32(0x1F868, ioaddr + 0xB8);
36                 if (phy_reg & 0x30000000) {
37                         tp->full_duplex = 1;
38                         new_csr6 |= 0x00000200;
39                 }
40                 if (tulip_debug > 1)
41                         netdev_dbg(dev, "PNIC autonegotiated status %08x, %s\n",
42                                    phy_reg, medianame[dev->if_port]);
43                 if (tp->csr6 != new_csr6) {
44                         tp->csr6 = new_csr6;
45                         /* Restart Tx */
46                         tulip_restart_rxtx(tp);
47                         dev->trans_start = jiffies;
48                 }
49         }
50 }
51
52 void pnic_lnk_change(struct net_device *dev, int csr5)
53 {
54         struct tulip_private *tp = netdev_priv(dev);
55         void __iomem *ioaddr = tp->base_addr;
56         int phy_reg = ioread32(ioaddr + 0xB8);
57
58         if (tulip_debug > 1)
59                 netdev_dbg(dev, "PNIC link changed state %08x, CSR5 %08x\n",
60                            phy_reg, csr5);
61         if (ioread32(ioaddr + CSR5) & TPLnkFail) {
62                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
63                 /* If we use an external MII, then we mustn't use the
64                  * internal negotiation.
65                  */
66                 if (tulip_media_cap[dev->if_port] & MediaIsMII)
67                         return;
68                 if (! tp->nwayset || time_after(jiffies, dev_trans_start(dev) + 1*HZ)) {
69                         tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
70                         iowrite32(tp->csr6, ioaddr + CSR6);
71                         iowrite32(0x30, ioaddr + CSR12);
72                         iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
73                         dev->trans_start = jiffies;
74                 }
75         } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
76                 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
77                         spin_lock(&tp->lock);
78                         tulip_check_duplex(dev);
79                         spin_unlock(&tp->lock);
80                 } else {
81                         pnic_do_nway(dev);
82                 }
83                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
84         }
85 }
86
87 void pnic_timer(unsigned long data)
88 {
89         struct net_device *dev = (struct net_device *)data;
90         struct tulip_private *tp = netdev_priv(dev);
91         void __iomem *ioaddr = tp->base_addr;
92         int next_tick = 60*HZ;
93
94         if(!ioread32(ioaddr + CSR7)) {
95                 /* the timer was called due to a work overflow
96                  * in the interrupt handler. Skip the connection
97                  * checks, the nic is definitively speaking with
98                  * his link partner.
99                  */
100                 goto too_good_connection;
101         }
102
103         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
104                 spin_lock_irq(&tp->lock);
105                 if (tulip_check_duplex(dev) > 0)
106                         next_tick = 3*HZ;
107                 spin_unlock_irq(&tp->lock);
108         } else {
109                 int csr12 = ioread32(ioaddr + CSR12);
110                 int new_csr6 = tp->csr6 & ~0x40C40200;
111                 int phy_reg = ioread32(ioaddr + 0xB8);
112                 int csr5 = ioread32(ioaddr + CSR5);
113
114                 if (tulip_debug > 1)
115                         netdev_dbg(dev, "PNIC timer PHY status %08x, %s CSR5 %08x\n",
116                                    phy_reg, medianame[dev->if_port], csr5);
117                 if (phy_reg & 0x04000000) {     /* Remote link fault */
118                         iowrite32(0x0201F078, ioaddr + 0xB8);
119                         next_tick = 1*HZ;
120                         tp->nwayset = 0;
121                 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
122                         pnic_do_nway(dev);
123                         next_tick = 60*HZ;
124                 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
125                         if (tulip_debug > 1)
126                                 netdev_dbg(dev, "%s link beat failed, CSR12 %04x, CSR5 %08x, PHY %03x\n",
127                                            medianame[dev->if_port],
128                                            csr12,
129                                            ioread32(ioaddr + CSR5),
130                                            ioread32(ioaddr + 0xB8));
131                         next_tick = 3*HZ;
132                         if (tp->medialock) {
133                         } else if (tp->nwayset  &&  (dev->if_port & 1)) {
134                                 next_tick = 1*HZ;
135                         } else if (dev->if_port == 0) {
136                                 dev->if_port = 3;
137                                 iowrite32(0x33, ioaddr + CSR12);
138                                 new_csr6 = 0x01860000;
139                                 iowrite32(0x1F868, ioaddr + 0xB8);
140                         } else {
141                                 dev->if_port = 0;
142                                 iowrite32(0x32, ioaddr + CSR12);
143                                 new_csr6 = 0x00420000;
144                                 iowrite32(0x1F078, ioaddr + 0xB8);
145                         }
146                         if (tp->csr6 != new_csr6) {
147                                 tp->csr6 = new_csr6;
148                                 /* Restart Tx */
149                                 tulip_restart_rxtx(tp);
150                                 dev->trans_start = jiffies;
151                                 if (tulip_debug > 1)
152                                         dev_info(&dev->dev,
153                                                  "Changing PNIC configuration to %s %s-duplex, CSR6 %08x\n",
154                                                  medianame[dev->if_port],
155                                                  tp->full_duplex ? "full" : "half",
156                                                  new_csr6);
157                         }
158                 }
159         }
160 too_good_connection:
161         mod_timer(&tp->timer, RUN_AT(next_tick));
162         if(!ioread32(ioaddr + CSR7)) {
163                 if (tulip_debug > 1)
164                         dev_info(&dev->dev, "sw timer wakeup\n");
165                 disable_irq(dev->irq);
166                 tulip_refill_rx(dev);
167                 enable_irq(dev->irq);
168                 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
169         }
170 }