1 /*
2 	drivers/net/tulip/timer.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.{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/pci.h>
18 #include "tulip.h"
19 
20 
tulip_timer(unsigned long data)21 void tulip_timer(unsigned long data)
22 {
23 	struct net_device *dev = (struct net_device *)data;
24 	struct tulip_private *tp = (struct tulip_private *)dev->priv;
25 	long ioaddr = dev->base_addr;
26 	u32 csr12 = inl(ioaddr + CSR12);
27 	int next_tick = 2*HZ;
28 
29 	if (tulip_debug > 2) {
30 		printk(KERN_DEBUG "%s: Media selection tick, %s, status %8.8x mode"
31 			   " %8.8x SIA %8.8x %8.8x %8.8x %8.8x.\n",
32 			   dev->name, medianame[dev->if_port], inl(ioaddr + CSR5),
33 			   inl(ioaddr + CSR6), csr12, inl(ioaddr + CSR13),
34 			   inl(ioaddr + CSR14), inl(ioaddr + CSR15));
35 	}
36 	switch (tp->chip_id) {
37 	case DC21040:
38 		if (!tp->medialock  &&  csr12 & 0x0002) { /* Network error */
39 			printk(KERN_INFO "%s: No link beat found.\n",
40 				   dev->name);
41 			dev->if_port = (dev->if_port == 2 ? 0 : 2);
42 			tulip_select_media(dev, 0);
43 			dev->trans_start = jiffies;
44 		}
45 		break;
46 	case DC21041:
47 		if (tulip_debug > 2)
48 			printk(KERN_DEBUG "%s: 21041 media tick  CSR12 %8.8x.\n",
49 				   dev->name, csr12);
50 		if (tp->medialock) break;
51 		switch (dev->if_port) {
52 		case 0: case 3: case 4:
53 		  if (csr12 & 0x0004) { /*LnkFail */
54 			/* 10baseT is dead.  Check for activity on alternate port. */
55 			tp->mediasense = 1;
56 			if (csr12 & 0x0200)
57 				dev->if_port = 2;
58 			else
59 				dev->if_port = 1;
60 			printk(KERN_INFO "%s: No 21041 10baseT link beat, Media switched to %s.\n",
61 				   dev->name, medianame[dev->if_port]);
62 			outl(0, ioaddr + CSR13); /* Reset */
63 			outl(t21041_csr14[dev->if_port], ioaddr + CSR14);
64 			outl(t21041_csr15[dev->if_port], ioaddr + CSR15);
65 			outl(t21041_csr13[dev->if_port], ioaddr + CSR13);
66 			next_tick = 10*HZ;			/* 2.4 sec. */
67 		  } else
68 			next_tick = 30*HZ;
69 		  break;
70 		case 1:					/* 10base2 */
71 		case 2:					/* AUI */
72 			if (csr12 & 0x0100) {
73 				next_tick = (30*HZ);			/* 30 sec. */
74 				tp->mediasense = 0;
75 			} else if ((csr12 & 0x0004) == 0) {
76 				printk(KERN_INFO "%s: 21041 media switched to 10baseT.\n",
77 					   dev->name);
78 				dev->if_port = 0;
79 				tulip_select_media(dev, 0);
80 				next_tick = (24*HZ)/10;				/* 2.4 sec. */
81 			} else if (tp->mediasense || (csr12 & 0x0002)) {
82 				dev->if_port = 3 - dev->if_port; /* Swap ports. */
83 				tulip_select_media(dev, 0);
84 				next_tick = 20*HZ;
85 			} else {
86 				next_tick = 20*HZ;
87 			}
88 			break;
89 		}
90 		break;
91 	case DC21140:
92 	case DC21142:
93 	case MX98713:
94 	case COMPEX9881:
95 	case DM910X:
96 	default: {
97 		struct medialeaf *mleaf;
98 		unsigned char *p;
99 		if (tp->mtable == NULL) {	/* No EEPROM info, use generic code. */
100 			/* Not much that can be done.
101 			   Assume this a generic MII or SYM transceiver. */
102 			next_tick = 60*HZ;
103 			if (tulip_debug > 2)
104 				printk(KERN_DEBUG "%s: network media monitor CSR6 %8.8x "
105 					   "CSR12 0x%2.2x.\n",
106 					   dev->name, inl(ioaddr + CSR6), csr12 & 0xff);
107 			break;
108 		}
109 		mleaf = &tp->mtable->mleaf[tp->cur_index];
110 		p = mleaf->leafdata;
111 		switch (mleaf->type) {
112 		case 0: case 4: {
113 			/* Type 0 serial or 4 SYM transceiver.  Check the link beat bit. */
114 			int offset = mleaf->type == 4 ? 5 : 2;
115 			s8 bitnum = p[offset];
116 			if (p[offset+1] & 0x80) {
117 				if (tulip_debug > 1)
118 					printk(KERN_DEBUG"%s: Transceiver monitor tick "
119 						   "CSR12=%#2.2x, no media sense.\n",
120 						   dev->name, csr12);
121 				if (mleaf->type == 4) {
122 					if (mleaf->media == 3 && (csr12 & 0x02))
123 						goto select_next_media;
124 				}
125 				break;
126 			}
127 			if (tulip_debug > 2)
128 				printk(KERN_DEBUG "%s: Transceiver monitor tick: CSR12=%#2.2x"
129 					   " bit %d is %d, expecting %d.\n",
130 					   dev->name, csr12, (bitnum >> 1) & 7,
131 					   (csr12 & (1 << ((bitnum >> 1) & 7))) != 0,
132 					   (bitnum >= 0));
133 			/* Check that the specified bit has the proper value. */
134 			if ((bitnum < 0) !=
135 				((csr12 & (1 << ((bitnum >> 1) & 7))) != 0)) {
136 				if (tulip_debug > 2)
137 					printk(KERN_DEBUG "%s: Link beat detected for %s.\n", dev->name,
138 					       medianame[mleaf->media & MEDIA_MASK]);
139 				if ((p[2] & 0x61) == 0x01)	/* Bogus Znyx board. */
140 					goto actually_mii;
141 				/* netif_carrier_on(dev); */
142 				break;
143 			}
144 			/* netif_carrier_off(dev); */
145 			if (tp->medialock)
146 				break;
147 	  select_next_media:
148 			if (--tp->cur_index < 0) {
149 				/* We start again, but should instead look for default. */
150 				tp->cur_index = tp->mtable->leafcount - 1;
151 			}
152 			dev->if_port = tp->mtable->mleaf[tp->cur_index].media;
153 			if (tulip_media_cap[dev->if_port] & MediaIsFD)
154 				goto select_next_media; /* Skip FD entries. */
155 			if (tulip_debug > 1)
156 				printk(KERN_DEBUG "%s: No link beat on media %s,"
157 				       " trying transceiver type %s.\n",
158 				       dev->name, medianame[mleaf->media & MEDIA_MASK],
159 				       medianame[tp->mtable->mleaf[tp->cur_index].media]);
160 			tulip_select_media(dev, 0);
161 			/* Restart the transmit process. */
162 			tulip_restart_rxtx(tp);
163 			next_tick = (24*HZ)/10;
164 			break;
165 		}
166 		case 1:  case 3:		/* 21140, 21142 MII */
167 		actually_mii:
168 			if (tulip_check_duplex(dev) < 0)
169 				{ /* netif_carrier_off(dev); */ }
170 			else
171 				{ /* netif_carrier_on(dev); */ }
172 			next_tick = 60*HZ;
173 			break;
174 		case 2:					/* 21142 serial block has no link beat. */
175 		default:
176 			break;
177 		}
178 	}
179 	break;
180 	}
181 	/* mod_timer synchronizes us with potential add_timer calls
182 	 * from interrupts.
183 	 */
184 	mod_timer(&tp->timer, RUN_AT(next_tick));
185 }
186 
187 
mxic_timer(unsigned long data)188 void mxic_timer(unsigned long data)
189 {
190 	struct net_device *dev = (struct net_device *)data;
191 	struct tulip_private *tp = (struct tulip_private *)dev->priv;
192 	long ioaddr = dev->base_addr;
193 	int next_tick = 60*HZ;
194 
195 	if (tulip_debug > 3) {
196 		printk(KERN_INFO"%s: MXIC negotiation status %8.8x.\n", dev->name,
197 			   inl(ioaddr + CSR12));
198 	}
199 	if (next_tick) {
200 		mod_timer(&tp->timer, RUN_AT(next_tick));
201 	}
202 }
203 
204 
comet_timer(unsigned long data)205 void comet_timer(unsigned long data)
206 {
207 	struct net_device *dev = (struct net_device *)data;
208 	struct tulip_private *tp = (struct tulip_private *)dev->priv;
209 	long ioaddr = dev->base_addr;
210 	int next_tick = 60*HZ;
211 
212 	if (tulip_debug > 1)
213 		printk(KERN_DEBUG "%s: Comet link status %4.4x partner capability "
214 			   "%4.4x.\n",
215 			   dev->name,
216 			   tulip_mdio_read(dev, tp->phys[0], 1),
217 			   tulip_mdio_read(dev, tp->phys[0], 5));
218 	/* mod_timer synchronizes us with potential add_timer calls
219 	 * from interrupts.
220 	 */
221 	if (tulip_check_duplex(dev) < 0)
222 		{ netif_carrier_off(dev); }
223 	else
224 		{ netif_carrier_on(dev); }
225 	mod_timer(&tp->timer, RUN_AT(next_tick));
226 }
227 
228