Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
[linux-2.6] / 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 refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
11         for more information on this driver.
12
13         Please submit bugs to http://bugzilla.kernel.org/ .
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/jiffies.h>
18 #include "tulip.h"
19
20
21 void pnic_do_nway(struct net_device *dev)
22 {
23         struct tulip_private *tp = netdev_priv(dev);
24         void __iomem *ioaddr = tp->base_addr;
25         u32 phy_reg = ioread32(ioaddr + 0xB8);
26         u32 new_csr6 = tp->csr6 & ~0x40C40200;
27
28         if (phy_reg & 0x78000000) { /* Ignore baseT4 */
29                 if (phy_reg & 0x20000000)               dev->if_port = 5;
30                 else if (phy_reg & 0x40000000)  dev->if_port = 3;
31                 else if (phy_reg & 0x10000000)  dev->if_port = 4;
32                 else if (phy_reg & 0x08000000)  dev->if_port = 0;
33                 tp->nwayset = 1;
34                 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
35                 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
36                 if (dev->if_port & 1)
37                         iowrite32(0x1F868, ioaddr + 0xB8);
38                 if (phy_reg & 0x30000000) {
39                         tp->full_duplex = 1;
40                         new_csr6 |= 0x00000200;
41                 }
42                 if (tulip_debug > 1)
43                         printk(KERN_DEBUG "%s: PNIC autonegotiated status %8.8x, %s.\n",
44                                    dev->name, phy_reg, medianame[dev->if_port]);
45                 if (tp->csr6 != new_csr6) {
46                         tp->csr6 = new_csr6;
47                         /* Restart Tx */
48                         tulip_restart_rxtx(tp);
49                         dev->trans_start = jiffies;
50                 }
51         }
52 }
53
54 void pnic_lnk_change(struct net_device *dev, int csr5)
55 {
56         struct tulip_private *tp = netdev_priv(dev);
57         void __iomem *ioaddr = tp->base_addr;
58         int phy_reg = ioread32(ioaddr + 0xB8);
59
60         if (tulip_debug > 1)
61                 printk(KERN_DEBUG "%s: PNIC link changed state %8.8x, CSR5 %8.8x.\n",
62                            dev->name, phy_reg, csr5);
63         if (ioread32(ioaddr + CSR5) & TPLnkFail) {
64                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
65                 /* If we use an external MII, then we mustn't use the
66                  * internal negotiation.
67                  */
68                 if (tulip_media_cap[dev->if_port] & MediaIsMII)
69                         return;
70                 if (! tp->nwayset  ||  time_after(jiffies, dev->trans_start + 1*HZ)) {
71                         tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
72                         iowrite32(tp->csr6, ioaddr + CSR6);
73                         iowrite32(0x30, ioaddr + CSR12);
74                         iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
75                         dev->trans_start = jiffies;
76                 }
77         } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
78                 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
79                         spin_lock(&tp->lock);
80                         tulip_check_duplex(dev);
81                         spin_unlock(&tp->lock);
82                 } else {
83                         pnic_do_nway(dev);
84                 }
85                 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
86         }
87 }
88
89 void pnic_timer(unsigned long data)
90 {
91         struct net_device *dev = (struct net_device *)data;
92         struct tulip_private *tp = netdev_priv(dev);
93         void __iomem *ioaddr = tp->base_addr;
94         int next_tick = 60*HZ;
95
96         if(!ioread32(ioaddr + CSR7)) {
97                 /* the timer was called due to a work overflow
98                  * in the interrupt handler. Skip the connection
99                  * checks, the nic is definitively speaking with
100                  * his link partner.
101                  */
102                 goto too_good_connection;
103         }
104
105         if (tulip_media_cap[dev->if_port] & MediaIsMII) {
106                 spin_lock_irq(&tp->lock);
107                 if (tulip_check_duplex(dev) > 0)
108                         next_tick = 3*HZ;
109                 spin_unlock_irq(&tp->lock);
110         } else {
111                 int csr12 = ioread32(ioaddr + CSR12);
112                 int new_csr6 = tp->csr6 & ~0x40C40200;
113                 int phy_reg = ioread32(ioaddr + 0xB8);
114                 int csr5 = ioread32(ioaddr + CSR5);
115
116                 if (tulip_debug > 1)
117                         printk(KERN_DEBUG "%s: PNIC timer PHY status %8.8x, %s "
118                                    "CSR5 %8.8x.\n",
119                                    dev->name, phy_reg, medianame[dev->if_port], csr5);
120                 if (phy_reg & 0x04000000) {     /* Remote link fault */
121                         iowrite32(0x0201F078, ioaddr + 0xB8);
122                         next_tick = 1*HZ;
123                         tp->nwayset = 0;
124                 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
125                         pnic_do_nway(dev);
126                         next_tick = 60*HZ;
127                 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
128                         if (tulip_debug > 1)
129                                 printk(KERN_DEBUG "%s: %s link beat failed, CSR12 %4.4x, "
130                                            "CSR5 %8.8x, PHY %3.3x.\n",
131                                            dev->name, medianame[dev->if_port], csr12,
132                                            ioread32(ioaddr + CSR5), ioread32(ioaddr + 0xB8));
133                         next_tick = 3*HZ;
134                         if (tp->medialock) {
135                         } else if (tp->nwayset  &&  (dev->if_port & 1)) {
136                                 next_tick = 1*HZ;
137                         } else if (dev->if_port == 0) {
138                                 dev->if_port = 3;
139                                 iowrite32(0x33, ioaddr + CSR12);
140                                 new_csr6 = 0x01860000;
141                                 iowrite32(0x1F868, ioaddr + 0xB8);
142                         } else {
143                                 dev->if_port = 0;
144                                 iowrite32(0x32, ioaddr + CSR12);
145                                 new_csr6 = 0x00420000;
146                                 iowrite32(0x1F078, ioaddr + 0xB8);
147                         }
148                         if (tp->csr6 != new_csr6) {
149                                 tp->csr6 = new_csr6;
150                                 /* Restart Tx */
151                                 tulip_restart_rxtx(tp);
152                                 dev->trans_start = jiffies;
153                                 if (tulip_debug > 1)
154                                         printk(KERN_INFO "%s: Changing PNIC configuration to %s "
155                                                    "%s-duplex, CSR6 %8.8x.\n",
156                                                    dev->name, medianame[dev->if_port],
157                                                    tp->full_duplex ? "full" : "half", new_csr6);
158                         }
159                 }
160         }
161 too_good_connection:
162         mod_timer(&tp->timer, RUN_AT(next_tick));
163         if(!ioread32(ioaddr + CSR7)) {
164                 if (tulip_debug > 1)
165                         printk(KERN_INFO "%s: sw timer wakeup.\n", dev->name);
166                 disable_irq(dev->irq);
167                 tulip_refill_rx(dev);
168                 enable_irq(dev->irq);
169                 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
170         }
171 }