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 }
172
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