1 /*
2 	drivers/net/ethernet/dec/tulip/21142.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 	DC21143 manual "21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
11 	Hardware Reference Manual" is currently available at :
12 	http://developer.intel.com/design/network/manuals/278074.htm
13 
14 	Please submit bugs to http://bugzilla.kernel.org/ .
15 */
16 
17 #include <linux/delay.h>
18 #include "tulip.h"
19 
20 
21 static u16 t21142_csr13[] = { 0x0001, 0x0009, 0x0009, 0x0000, 0x0001, };
22 u16 t21142_csr14[] =	    { 0xFFFF, 0x0705, 0x0705, 0x0000, 0x7F3D, };
23 static u16 t21142_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
24 
25 
26 /* Handle the 21143 uniquely: do autoselect with NWay, not the EEPROM list
27    of available transceivers.  */
28 void t21142_media_task(struct work_struct *work)
29 {
30 	struct tulip_private *tp =
31 		container_of(work, struct tulip_private, media_work);
32 	struct net_device *dev = tp->dev;
33 	void __iomem *ioaddr = tp->base_addr;
34 	int csr12 = ioread32(ioaddr + CSR12);
35 	int next_tick = 60*HZ;
36 	int new_csr6 = 0;
37 	int csr14 = ioread32(ioaddr + CSR14);
38 
39 	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
40 	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
41 		csr12 |= 6;
42 	if (tulip_debug > 2)
43 		dev_info(&dev->dev, "21143 negotiation status %08x, %s\n",
44 			 csr12, medianame[dev->if_port]);
45 	if (tulip_media_cap[dev->if_port] & MediaIsMII) {
46 		if (tulip_check_duplex(dev) < 0) {
47 			netif_carrier_off(dev);
48 			next_tick = 3*HZ;
49 		} else {
50 			netif_carrier_on(dev);
51 			next_tick = 60*HZ;
52 		}
53 	} else if (tp->nwayset) {
54 		/* Don't screw up a negotiated session! */
55 		if (tulip_debug > 1)
56 			dev_info(&dev->dev,
57 				 "Using NWay-set %s media, csr12 %08x\n",
58 				 medianame[dev->if_port], csr12);
59 	} else if (tp->medialock) {
60 			;
61 	} else if (dev->if_port == 3) {
62 		if (csr12 & 2) {	/* No 100mbps link beat, revert to 10mbps. */
63 			if (tulip_debug > 1)
64 				dev_info(&dev->dev,
65 					 "No 21143 100baseTx link beat, %08x, trying NWay\n",
66 					 csr12);
67 			t21142_start_nway(dev);
68 			next_tick = 3*HZ;
69 		}
70 	} else if ((csr12 & 0x7000) != 0x5000) {
71 		/* Negotiation failed.  Search media types. */
72 		if (tulip_debug > 1)
73 			dev_info(&dev->dev,
74 				 "21143 negotiation failed, status %08x\n",
75 				 csr12);
76 		if (!(csr12 & 4)) {		/* 10mbps link beat good. */
77 			new_csr6 = 0x82420000;
78 			dev->if_port = 0;
79 			iowrite32(0, ioaddr + CSR13);
80 			iowrite32(0x0003FFFF, ioaddr + CSR14);
81 			iowrite16(t21142_csr15[dev->if_port], ioaddr + CSR15);
82 			iowrite32(t21142_csr13[dev->if_port], ioaddr + CSR13);
83 		} else {
84 			/* Select 100mbps port to check for link beat. */
85 			new_csr6 = 0x83860000;
86 			dev->if_port = 3;
87 			iowrite32(0, ioaddr + CSR13);
88 			iowrite32(0x0003FFFF, ioaddr + CSR14);
89 			iowrite16(8, ioaddr + CSR15);
90 			iowrite32(1, ioaddr + CSR13);
91 		}
92 		if (tulip_debug > 1)
93 			dev_info(&dev->dev, "Testing new 21143 media %s\n",
94 				 medianame[dev->if_port]);
95 		if (new_csr6 != (tp->csr6 & ~0x00D5)) {
96 			tp->csr6 &= 0x00D5;
97 			tp->csr6 |= new_csr6;
98 			iowrite32(0x0301, ioaddr + CSR12);
99 			tulip_restart_rxtx(tp);
100 		}
101 		next_tick = 3*HZ;
102 	}
103 
104 	/* mod_timer synchronizes us with potential add_timer calls
105 	 * from interrupts.
106 	 */
107 	mod_timer(&tp->timer, RUN_AT(next_tick));
108 }
109 
110 
111 void t21142_start_nway(struct net_device *dev)
112 {
113 	struct tulip_private *tp = netdev_priv(dev);
114 	void __iomem *ioaddr = tp->base_addr;
115 	int csr14 = ((tp->sym_advertise & 0x0780) << 9)  |
116 		((tp->sym_advertise & 0x0020) << 1) | 0xffbf;
117 
118 	dev->if_port = 0;
119 	tp->nway = tp->mediasense = 1;
120 	tp->nwayset = tp->lpar = 0;
121 	if (tulip_debug > 1)
122 		netdev_dbg(dev, "Restarting 21143 autonegotiation, csr14=%08x\n",
123 			   csr14);
124 	iowrite32(0x0001, ioaddr + CSR13);
125 	udelay(100);
126 	iowrite32(csr14, ioaddr + CSR14);
127 	tp->csr6 = 0x82420000 | (tp->sym_advertise & 0x0040 ? FullDuplex : 0);
128 	iowrite32(tp->csr6, ioaddr + CSR6);
129 	if (tp->mtable  &&  tp->mtable->csr15dir) {
130 		iowrite32(tp->mtable->csr15dir, ioaddr + CSR15);
131 		iowrite32(tp->mtable->csr15val, ioaddr + CSR15);
132 	} else
133 		iowrite16(0x0008, ioaddr + CSR15);
134 	iowrite32(0x1301, ioaddr + CSR12); 		/* Trigger NWAY. */
135 }
136 
137 
138 
139 void t21142_lnk_change(struct net_device *dev, int csr5)
140 {
141 	struct tulip_private *tp = netdev_priv(dev);
142 	void __iomem *ioaddr = tp->base_addr;
143 	int csr12 = ioread32(ioaddr + CSR12);
144 	int csr14 = ioread32(ioaddr + CSR14);
145 
146 	/* CSR12[LS10,LS100] are not reliable during autonegotiation */
147 	if ((csr14 & 0x80) && (csr12 & 0x7000) != 0x5000)
148 		csr12 |= 6;
149 	if (tulip_debug > 1)
150 		dev_info(&dev->dev,
151 			 "21143 link status interrupt %08x, CSR5 %x, %08x\n",
152 			 csr12, csr5, csr14);
153 
154 	/* If NWay finished and we have a negotiated partner capability. */
155 	if (tp->nway  &&  !tp->nwayset  &&  (csr12 & 0x7000) == 0x5000) {
156 		int setup_done = 0;
157 		int negotiated = tp->sym_advertise & (csr12 >> 16);
158 		tp->lpar = csr12 >> 16;
159 		tp->nwayset = 1;
160 		/* If partner cannot negotiate, it is 10Mbps Half Duplex */
161 		if (!(csr12 & 0x8000))		dev->if_port = 0;
162 		else if (negotiated & 0x0100)	dev->if_port = 5;
163 		else if (negotiated & 0x0080)	dev->if_port = 3;
164 		else if (negotiated & 0x0040)	dev->if_port = 4;
165 		else if (negotiated & 0x0020)	dev->if_port = 0;
166 		else {
167 			tp->nwayset = 0;
168 			if ((csr12 & 2) == 0  &&  (tp->sym_advertise & 0x0180))
169 				dev->if_port = 3;
170 		}
171 		tp->full_duplex = (tulip_media_cap[dev->if_port] & MediaAlwaysFD) ? 1:0;
172 
173 		if (tulip_debug > 1) {
174 			if (tp->nwayset)
175 				dev_info(&dev->dev,
176 					 "Switching to %s based on link negotiation %04x & %04x = %04x\n",
177 					 medianame[dev->if_port],
178 					 tp->sym_advertise, tp->lpar,
179 					 negotiated);
180 			else
181 				dev_info(&dev->dev,
182 					 "Autonegotiation failed, using %s, link beat status %04x\n",
183 					 medianame[dev->if_port], csr12);
184 		}
185 
186 		if (tp->mtable) {
187 			int i;
188 			for (i = 0; i < tp->mtable->leafcount; i++)
189 				if (tp->mtable->mleaf[i].media == dev->if_port) {
190 					int startup = ! ((tp->chip_id == DC21143 && (tp->revision == 48 || tp->revision == 65)));
191 					tp->cur_index = i;
192 					tulip_select_media(dev, startup);
193 					setup_done = 1;
194 					break;
195 				}
196 		}
197 		if ( ! setup_done) {
198 			tp->csr6 = (dev->if_port & 1 ? 0x838E0000 : 0x82420000) | (tp->csr6 & 0x20ff);
199 			if (tp->full_duplex)
200 				tp->csr6 |= 0x0200;
201 			iowrite32(1, ioaddr + CSR13);
202 		}
203 #if 0							/* Restart shouldn't be needed. */
204 		iowrite32(tp->csr6 | RxOn, ioaddr + CSR6);
205 		if (tulip_debug > 2)
206 			netdev_dbg(dev, " Restarting Tx and Rx, CSR5 is %08x\n",
207 				   ioread32(ioaddr + CSR5));
208 #endif
209 		tulip_start_rxtx(tp);
210 		if (tulip_debug > 2)
211 			netdev_dbg(dev, " Setting CSR6 %08x/%x CSR12 %08x\n",
212 				   tp->csr6, ioread32(ioaddr + CSR6),
213 				   ioread32(ioaddr + CSR12));
214 	} else if ((tp->nwayset  &&  (csr5 & 0x08000000) &&
215 		    (dev->if_port == 3  ||  dev->if_port == 5) &&
216 		    (csr12 & 2) == 2) ||
217 		   (tp->nway && (csr5 & (TPLnkFail)))) {
218 		/* Link blew? Maybe restart NWay. */
219 		del_timer_sync(&tp->timer);
220 		t21142_start_nway(dev);
221 		tp->timer.expires = RUN_AT(3*HZ);
222 		add_timer(&tp->timer);
223 	} else if (dev->if_port == 3  ||  dev->if_port == 5) {
224 		if (tulip_debug > 1)
225 			dev_info(&dev->dev, "21143 %s link beat %s\n",
226 				 medianame[dev->if_port],
227 				 (csr12 & 2) ? "failed" : "good");
228 		if ((csr12 & 2)  &&  ! tp->medialock) {
229 			del_timer_sync(&tp->timer);
230 			t21142_start_nway(dev);
231 			tp->timer.expires = RUN_AT(3*HZ);
232 			add_timer(&tp->timer);
233 		} else if (dev->if_port == 5)
234 			iowrite32(csr14 & ~0x080, ioaddr + CSR14);
235 	} else if (dev->if_port == 0  ||  dev->if_port == 4) {
236 		if ((csr12 & 4) == 0)
237 			dev_info(&dev->dev, "21143 10baseT link beat good\n");
238 	} else if (!(csr12 & 4)) {		/* 10mbps link beat good. */
239 		if (tulip_debug)
240 			dev_info(&dev->dev, "21143 10mbps sensed media\n");
241 		dev->if_port = 0;
242 	} else if (tp->nwayset) {
243 		if (tulip_debug)
244 			dev_info(&dev->dev, "21143 using NWay-set %s, csr6 %08x\n",
245 				 medianame[dev->if_port], tp->csr6);
246 	} else {		/* 100mbps link beat good. */
247 		if (tulip_debug)
248 			dev_info(&dev->dev, "21143 100baseTx sensed media\n");
249 		dev->if_port = 3;
250 		tp->csr6 = 0x838E0000 | (tp->csr6 & 0x20ff);
251 		iowrite32(0x0003FF7F, ioaddr + CSR14);
252 		iowrite32(0x0301, ioaddr + CSR12);
253 		tulip_restart_rxtx(tp);
254 	}
255 }
256 
257 
258