1 /*
2 drivers/net/ethernet/dec/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
pnic_do_nway(struct net_device * dev)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 netif_trans_update(dev);
48 }
49 }
50 }
51
pnic_lnk_change(struct net_device * dev,int csr5)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 netif_trans_update(dev);
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
pnic_timer(struct timer_list * t)87 void pnic_timer(struct timer_list *t)
88 {
89 struct tulip_private *tp = from_timer(tp, t, timer);
90 struct net_device *dev = tp->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 netif_trans_update(dev);
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 }
171