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 | |
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; |
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 | |
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(lock: &tp->lock); |
78 | tulip_check_duplex(dev); |
79 | spin_unlock(lock: &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(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(lock: &tp->lock); |
105 | if (tulip_check_duplex(dev) > 0) |
106 | next_tick = 3*HZ; |
107 | spin_unlock_irq(lock: &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(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(irq: dev->irq); |
166 | tulip_refill_rx(dev); |
167 | enable_irq(irq: dev->irq); |
168 | iowrite32(tulip_tbl[tp->chip_id].valid_intrs, ioaddr + CSR7); |
169 | } |
170 | } |
171 | |