tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 drivers/net/tulip/pnic.c
3
4 Maintained by Jeff Garzik <jgarzik@pobox.com>
5 Copyright 2000,2001 The Linux Kernel Team
6 Written/copyright 1994-2001 by Donald Becker.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
12 for more information on this driver, or visit the project
13 Web page at http://sourceforge.net/projects/tulip/
14
15*/
16
17#include <linux/kernel.h>
18#include <linux/pci.h>
19#include "tulip.h"
20
21
22void pnic_do_nway(struct net_device *dev)
23{
24 struct tulip_private *tp = netdev_priv(dev);
25 void __iomem *ioaddr = tp->base_addr;
26 u32 phy_reg = ioread32(ioaddr + 0xB8);
27 u32 new_csr6 = tp->csr6 & ~0x40C40200;
28
29 if (phy_reg & 0x78000000) { /* Ignore baseT4 */
30 if (phy_reg & 0x20000000) dev->if_port = 5;
31 else if (phy_reg & 0x40000000) dev->if_port = 3;
32 else if (phy_reg & 0x10000000) dev->if_port = 4;
33 else if (phy_reg & 0x08000000) dev->if_port = 0;
34 tp->nwayset = 1;
35 new_csr6 = (dev->if_port & 1) ? 0x01860000 : 0x00420000;
36 iowrite32(0x32 | (dev->if_port & 1), ioaddr + CSR12);
37 if (dev->if_port & 1)
38 iowrite32(0x1F868, ioaddr + 0xB8);
39 if (phy_reg & 0x30000000) {
40 tp->full_duplex = 1;
41 new_csr6 |= 0x00000200;
42 }
43 if (tulip_debug > 1)
44 printk(KERN_DEBUG "%s: PNIC autonegotiated status %8.8x, %s.\n",
45 dev->name, phy_reg, medianame[dev->if_port]);
46 if (tp->csr6 != new_csr6) {
47 tp->csr6 = new_csr6;
48 /* Restart Tx */
49 tulip_restart_rxtx(tp);
50 dev->trans_start = jiffies;
51 }
52 }
53}
54
55void pnic_lnk_change(struct net_device *dev, int csr5)
56{
57 struct tulip_private *tp = netdev_priv(dev);
58 void __iomem *ioaddr = tp->base_addr;
59 int phy_reg = ioread32(ioaddr + 0xB8);
60
61 if (tulip_debug > 1)
62 printk(KERN_DEBUG "%s: PNIC link changed state %8.8x, CSR5 %8.8x.\n",
63 dev->name, phy_reg, csr5);
64 if (ioread32(ioaddr + CSR5) & TPLnkFail) {
65 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkFail) | TPLnkPass, ioaddr + CSR7);
66 /* If we use an external MII, then we mustn't use the
67 * internal negotiation.
68 */
69 if (tulip_media_cap[dev->if_port] & MediaIsMII)
70 return;
71 if (! tp->nwayset || jiffies - dev->trans_start > 1*HZ) {
72 tp->csr6 = 0x00420000 | (tp->csr6 & 0x0000fdff);
73 iowrite32(tp->csr6, ioaddr + CSR6);
74 iowrite32(0x30, ioaddr + CSR12);
75 iowrite32(0x0201F078, ioaddr + 0xB8); /* Turn on autonegotiation. */
76 dev->trans_start = jiffies;
77 }
78 } else if (ioread32(ioaddr + CSR5) & TPLnkPass) {
79 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
80 spin_lock(&tp->lock);
81 tulip_check_duplex(dev);
82 spin_unlock(&tp->lock);
83 } else {
84 pnic_do_nway(dev);
85 }
86 iowrite32((ioread32(ioaddr + CSR7) & ~TPLnkPass) | TPLnkFail, ioaddr + CSR7);
87 }
88}
89
90void pnic_timer(unsigned long data)
91{
92 struct net_device *dev = (struct net_device *)data;
93 struct tulip_private *tp = netdev_priv(dev);
94 void __iomem *ioaddr = tp->base_addr;
95 int next_tick = 60*HZ;
96
97 if(!ioread32(ioaddr + CSR7)) {
98 /* the timer was called due to a work overflow
99 * in the interrupt handler. Skip the connection
100 * checks, the nic is definitively speaking with
101 * his link partner.
102 */
103 goto too_good_connection;
104 }
105
106 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
107 spin_lock_irq(&tp->lock);
108 if (tulip_check_duplex(dev) > 0)
109 next_tick = 3*HZ;
110 spin_unlock_irq(&tp->lock);
111 } else {
112 int csr12 = ioread32(ioaddr + CSR12);
113 int new_csr6 = tp->csr6 & ~0x40C40200;
114 int phy_reg = ioread32(ioaddr + 0xB8);
115 int csr5 = ioread32(ioaddr + CSR5);
116
117 if (tulip_debug > 1)
118 printk(KERN_DEBUG "%s: PNIC timer PHY status %8.8x, %s "
119 "CSR5 %8.8x.\n",
120 dev->name, phy_reg, medianame[dev->if_port], csr5);
121 if (phy_reg & 0x04000000) { /* Remote link fault */
122 iowrite32(0x0201F078, ioaddr + 0xB8);
123 next_tick = 1*HZ;
124 tp->nwayset = 0;
125 } else if (phy_reg & 0x78000000) { /* Ignore baseT4 */
126 pnic_do_nway(dev);
127 next_tick = 60*HZ;
128 } else if (csr5 & TPLnkFail) { /* 100baseTx link beat */
129 if (tulip_debug > 1)
130 printk(KERN_DEBUG "%s: %s link beat failed, CSR12 %4.4x, "
131 "CSR5 %8.8x, PHY %3.3x.\n",
132 dev->name, medianame[dev->if_port], csr12,
133 ioread32(ioaddr + CSR5), ioread32(ioaddr + 0xB8));
134 next_tick = 3*HZ;
135 if (tp->medialock) {
136 } else if (tp->nwayset && (dev->if_port & 1)) {
137 next_tick = 1*HZ;
138 } else if (dev->if_port == 0) {
139 dev->if_port = 3;
140 iowrite32(0x33, ioaddr + CSR12);
141 new_csr6 = 0x01860000;
142 iowrite32(0x1F868, ioaddr + 0xB8);
143 } else {
144 dev->if_port = 0;
145 iowrite32(0x32, ioaddr + CSR12);
146 new_csr6 = 0x00420000;
147 iowrite32(0x1F078, ioaddr + 0xB8);
148 }
149 if (tp->csr6 != new_csr6) {
150 tp->csr6 = new_csr6;
151 /* Restart Tx */
152 tulip_restart_rxtx(tp);
153 dev->trans_start = jiffies;
154 if (tulip_debug > 1)
155 printk(KERN_INFO "%s: Changing PNIC configuration to %s "
156 "%s-duplex, CSR6 %8.8x.\n",
157 dev->name, medianame[dev->if_port],
158 tp->full_duplex ? "full" : "half", new_csr6);
159 }
160 }
161 }
162too_good_connection:
163 mod_timer(&tp->timer, RUN_AT(next_tick));
164 if(!ioread32(ioaddr + CSR7)) {
165 if (tulip_debug > 1)
166 printk(KERN_INFO "%s: sw timer wakeup.\n", dev->name);
167 disable_irq(dev->irq);
168 tulip_refill_rx(dev);
169 enable_irq(dev->irq);
170 iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7);
171 }
172}