xref: /openbmc/linux/drivers/net/ethernet/dec/tulip/pnic.c (revision 6b0671a2)
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;
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