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Ok. I didn't make 2.4.0 in 2000. Tough. I tried, but we had some
[davej-history.git] / drivers / net / tulip / media.c
blobaa3019098e6e5f4b1e8231032c43a415ea79da5b
1 /*
2 drivers/net/tulip/media.c
3
4 Maintained by Jeff Garzik <jgarzik@mandrakesoft.com>
5 Copyright 2000 The Linux Kernel Team
6 Written/copyright 1994-1999 by Donald Becker.
7
8 This software may be used and distributed according to the terms
9 of the GNU Public License, incorporated herein by reference.
10
11 Please refer to Documentation/networking/tulip.txt for more
12 information on this driver.
13
14 */
15
16 #include "tulip.h"
17
18
19 /* This is a mysterious value that can be written to CSR11 in the 21040 (only)
20 to support a pre-NWay full-duplex signaling mechanism using short frames.
21 No one knows what it should be, but if left at its default value some
22 10base2(!) packets trigger a full-duplex-request interrupt. */
23 #define FULL_DUPLEX_MAGIC 0x6969
24
25
26 /* MII transceiver control section.
27 Read and write the MII registers using software-generated serial
28 MDIO protocol. See the MII specifications or DP83840A data sheet
29 for details. */
30
31 int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
32 {
33 struct tulip_private *tp = (struct tulip_private *)dev->priv;
34 int i;
35 int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
36 int retval = 0;
37 long ioaddr = dev->base_addr;
38 long mdio_addr = ioaddr + CSR9;
39
40 if (tp->chip_id == LC82C168) {
41 int i = 1000;
42 outl(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
43 inl(ioaddr + 0xA0);
44 inl(ioaddr + 0xA0);
45 while (--i > 0)
46 if ( ! ((retval = inl(ioaddr + 0xA0)) & 0x80000000))
47 return retval & 0xffff;
48 return 0xffff;
49 }
50
51 if (tp->chip_id == COMET) {
52 if (phy_id == 1) {
53 if (location < 7)
54 return inl(ioaddr + 0xB4 + (location<<2));
55 else if (location == 17)
56 return inl(ioaddr + 0xD0);
57 else if (location >= 29 && location <= 31)
58 return inl(ioaddr + 0xD4 + ((location-29)<<2));
59 }
60 return 0xffff;
61 }
62
63 /* Establish sync by sending at least 32 logic ones. */
64 for (i = 32; i >= 0; i--) {
65 outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
66 mdio_delay();
67 outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
68 mdio_delay();
69 }
70 /* Shift the read command bits out. */
71 for (i = 15; i >= 0; i--) {
72 int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
73
74 outl(MDIO_ENB | dataval, mdio_addr);
75 mdio_delay();
76 outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
77 mdio_delay();
78 }
79 /* Read the two transition, 16 data, and wire-idle bits. */
80 for (i = 19; i > 0; i--) {
81 outl(MDIO_ENB_IN, mdio_addr);
82 mdio_delay();
83 retval = (retval << 1) | ((inl(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
84 outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
85 mdio_delay();
86 }
87 return (retval>>1) & 0xffff;
88 }
89
90 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value)
91 {
92 struct tulip_private *tp = (struct tulip_private *)dev->priv;
93 int i;
94 int cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
95 long ioaddr = dev->base_addr;
96 long mdio_addr = ioaddr + CSR9;
97
98 if (tp->chip_id == LC82C168) {
99 int i = 1000;
100 outl(cmd, ioaddr + 0xA0);
101 do
102 if ( ! (inl(ioaddr + 0xA0) & 0x80000000))
103 break;
104 while (--i > 0);
105 return;
106 }
107
108 if (tp->chip_id == COMET) {
109 if (phy_id != 1)
110 return;
111 if (location < 7)
112 outl(value, ioaddr + 0xB4 + (location<<2));
113 else if (location == 17)
114 outl(value, ioaddr + 0xD0);
115 else if (location >= 29 && location <= 31)
116 outl(value, ioaddr + 0xD4 + ((location-29)<<2));
117 return;
118 }
119
120 /* Establish sync by sending 32 logic ones. */
121 for (i = 32; i >= 0; i--) {
122 outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
123 mdio_delay();
124 outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
125 mdio_delay();
126 }
127 /* Shift the command bits out. */
128 for (i = 31; i >= 0; i--) {
129 int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
130 outl(MDIO_ENB | dataval, mdio_addr);
131 mdio_delay();
132 outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
133 mdio_delay();
134 }
135 /* Clear out extra bits. */
136 for (i = 2; i > 0; i--) {
137 outl(MDIO_ENB_IN, mdio_addr);
138 mdio_delay();
139 outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
140 mdio_delay();
141 }
142 }
143
144
145 /* Set up the transceiver control registers for the selected media type. */
146 void tulip_select_media(struct net_device *dev, int startup)
147 {
148 long ioaddr = dev->base_addr;
149 struct tulip_private *tp = (struct tulip_private *)dev->priv;
150 struct mediatable *mtable = tp->mtable;
151 u32 new_csr6;
152 int i;
153
154 if (mtable) {
155 struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
156 unsigned char *p = mleaf->leafdata;
157 switch (mleaf->type) {
158 case 0: /* 21140 non-MII xcvr. */
159 if (tulip_debug > 1)
160 printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
161 " with control setting %2.2x.\n",
162 dev->name, p[1]);
163 dev->if_port = p[0];
164 if (startup)
165 outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
166 outl(p[1], ioaddr + CSR12);
167 new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
168 break;
169 case 2: case 4: {
170 u16 setup[5];
171 u32 csr13val, csr14val, csr15dir, csr15val;
172 for (i = 0; i < 5; i++)
173 setup[i] = get_u16(&p[i*2 + 1]);
174
175 dev->if_port = p[0] & 15;
176 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
177 tp->full_duplex = 1;
178
179 if (startup && mtable->has_reset) {
180 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
181 unsigned char *rst = rleaf->leafdata;
182 if (tulip_debug > 1)
183 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
184 dev->name);
185 for (i = 0; i < rst[0]; i++)
186 outl(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
187 }
188 if (tulip_debug > 1)
189 printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
190 "%4.4x/%4.4x.\n",
191 dev->name, medianame[dev->if_port], setup[0], setup[1]);
192 if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
193 csr13val = setup[0];
194 csr14val = setup[1];
195 csr15dir = (setup[3]<<16) | setup[2];
196 csr15val = (setup[4]<<16) | setup[2];
197 outl(0, ioaddr + CSR13);
198 outl(csr14val, ioaddr + CSR14);
199 outl(csr15dir, ioaddr + CSR15); /* Direction */
200 outl(csr15val, ioaddr + CSR15); /* Data */
201 outl(csr13val, ioaddr + CSR13);
202 } else {
203 csr13val = 1;
204 csr14val = 0x0003FF7F;
205 csr15dir = (setup[0]<<16) | 0x0008;
206 csr15val = (setup[1]<<16) | 0x0008;
207 if (dev->if_port <= 4)
208 csr14val = t21142_csr14[dev->if_port];
209 if (startup) {
210 outl(0, ioaddr + CSR13);
211 outl(csr14val, ioaddr + CSR14);
212 }
213 outl(csr15dir, ioaddr + CSR15); /* Direction */
214 outl(csr15val, ioaddr + CSR15); /* Data */
215 if (startup) outl(csr13val, ioaddr + CSR13);
216 }
217 if (tulip_debug > 1)
218 printk(KERN_DEBUG "%s: Setting CSR15 to %8.8x/%8.8x.\n",
219 dev->name, csr15dir, csr15val);
220 if (mleaf->type == 4)
221 new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
222 else
223 new_csr6 = 0x82420000;
224 break;
225 }
226 case 1: case 3: {
227 int phy_num = p[0];
228 int init_length = p[1];
229 u16 *misc_info;
230 u16 to_advertise;
231
232 dev->if_port = 11;
233 new_csr6 = 0x020E0000;
234 if (mleaf->type == 3) { /* 21142 */
235 u16 *init_sequence = (u16*)(p+2);
236 u16 *reset_sequence = &((u16*)(p+3))[init_length];
237 int reset_length = p[2 + init_length*2];
238 misc_info = reset_sequence + reset_length;
239 if (startup)
240 for (i = 0; i < reset_length; i++)
241 outl(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
242 for (i = 0; i < init_length; i++)
243 outl(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
244 } else {
245 u8 *init_sequence = p + 2;
246 u8 *reset_sequence = p + 3 + init_length;
247 int reset_length = p[2 + init_length];
248 misc_info = (u16*)(reset_sequence + reset_length);
249 if (startup) {
250 outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
251 for (i = 0; i < reset_length; i++)
252 outl(reset_sequence[i], ioaddr + CSR12);
253 }
254 for (i = 0; i < init_length; i++)
255 outl(init_sequence[i], ioaddr + CSR12);
256 }
257 to_advertise = (get_u16(&misc_info[1]) & tp->to_advertise) | 1;
258 tp->advertising[phy_num] = to_advertise;
259 if (tulip_debug > 1)
260 printk(KERN_DEBUG "%s: Advertising %4.4x on PHY %d (%d).\n",
261 dev->name, to_advertise, phy_num, tp->phys[phy_num]);
262 /* Bogus: put in by a committee? */
263 tulip_mdio_write(dev, tp->phys[phy_num], 4, to_advertise);
264 break;
265 }
266 default:
267 printk(KERN_DEBUG "%s: Invalid media table selection %d.\n",
268 dev->name, mleaf->type);
269 new_csr6 = 0x020E0000;
270 }
271 if (tulip_debug > 1)
272 printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
273 dev->name, medianame[dev->if_port],
274 inl(ioaddr + CSR12) & 0xff);
275 } else if (tp->chip_id == DC21041) {
276 int port = dev->if_port <= 4 ? dev->if_port : 0;
277 if (tulip_debug > 1)
278 printk(KERN_DEBUG "%s: 21041 using media %s, CSR12 is %4.4x.\n",
279 dev->name, medianame[port == 3 ? 12: port],
280 inl(ioaddr + CSR12));
281 outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
282 outl(t21041_csr14[port], ioaddr + CSR14);
283 outl(t21041_csr15[port], ioaddr + CSR15);
284 outl(t21041_csr13[port], ioaddr + CSR13);
285 new_csr6 = 0x80020000;
286 } else if (tp->chip_id == LC82C168) {
287 if (startup && ! tp->medialock)
288 dev->if_port = tp->mii_cnt ? 11 : 0;
289 if (tulip_debug > 1)
290 printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
291 dev->name, inl(ioaddr + 0xB8), medianame[dev->if_port]);
292 if (tp->mii_cnt) {
293 new_csr6 = 0x810C0000;
294 outl(0x0001, ioaddr + CSR15);
295 outl(0x0201B07A, ioaddr + 0xB8);
296 } else if (startup) {
297 /* Start with 10mbps to do autonegotiation. */
298 outl(0x32, ioaddr + CSR12);
299 new_csr6 = 0x00420000;
300 outl(0x0001B078, ioaddr + 0xB8);
301 outl(0x0201B078, ioaddr + 0xB8);
302 } else if (dev->if_port == 3 || dev->if_port == 5) {
303 outl(0x33, ioaddr + CSR12);
304 new_csr6 = 0x01860000;
305 /* Trigger autonegotiation. */
306 outl(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
307 } else {
308 outl(0x32, ioaddr + CSR12);
309 new_csr6 = 0x00420000;
310 outl(0x1F078, ioaddr + 0xB8);
311 }
312 } else if (tp->chip_id == DC21040) { /* 21040 */
313 /* Turn on the xcvr interface. */
314 int csr12 = inl(ioaddr + CSR12);
315 if (tulip_debug > 1)
316 printk(KERN_DEBUG "%s: 21040 media type is %s, CSR12 is %2.2x.\n",
317 dev->name, medianame[dev->if_port], csr12);
318 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
319 tp->full_duplex = 1;
320 new_csr6 = 0x20000;
321 /* Set the full duplux match frame. */
322 outl(FULL_DUPLEX_MAGIC, ioaddr + CSR11);
323 outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
324 if (t21040_csr13[dev->if_port] & 8) {
325 outl(0x0705, ioaddr + CSR14);
326 outl(0x0006, ioaddr + CSR15);
327 } else {
328 outl(0xffff, ioaddr + CSR14);
329 outl(0x0000, ioaddr + CSR15);
330 }
331 outl(0x8f01 | t21040_csr13[dev->if_port], ioaddr + CSR13);
332 } else { /* Unknown chip type with no media table. */
333 if (tp->default_port == 0)
334 dev->if_port = tp->mii_cnt ? 11 : 3;
335 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
336 new_csr6 = 0x020E0000;
337 } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
338 new_csr6 = 0x028600000;
339 } else
340 new_csr6 = 0x038600000;
341 if (tulip_debug > 1)
342 printk(KERN_DEBUG "%s: No media description table, assuming "
343 "%s transceiver, CSR12 %2.2x.\n",
344 dev->name, medianame[dev->if_port],
345 inl(ioaddr + CSR12));
346 }
347
348 tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
349 return;
350 }
351
352 /*
353 Check the MII negotiated duplex, and change the CSR6 setting if
354 required.
355 Return 0 if everything is OK.
356 Return < 0 if the transceiver is missing or has no link beat.
357 */
358 int tulip_check_duplex(struct net_device *dev)
359 {
360 struct tulip_private *tp = (struct tulip_private *)dev->priv;
361 int mii_reg1, mii_reg5, negotiated, duplex;
362
363 if (tp->full_duplex_lock)
364 return 0;
365 mii_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
366 mii_reg5 = tulip_mdio_read(dev, tp->phys[0], 5);
367 if (tulip_debug > 1)
368 printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
369 "%4.4x.\n", dev->name, mii_reg1, mii_reg5);
370 if (mii_reg1 == 0xffff)
371 return -2;
372 if ((mii_reg1 & 0x0004) == 0) {
373 int new_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
374 if ((new_reg1 & 0x0004) == 0) {
375 if (tulip_debug > 1)
376 printk(KERN_INFO "%s: No link beat on the MII interface,"
377 " status %4.4x.\n", dev->name, new_reg1);
378 return -1;
379 }
380 }
381 negotiated = mii_reg5 & tp->advertising[0];
382 duplex = ((negotiated & 0x0300) == 0x0100
383 || (negotiated & 0x00C0) == 0x0040);
384 /* 100baseTx-FD or 10T-FD, but not 100-HD */
385 if (tp->full_duplex != duplex) {
386 tp->full_duplex = duplex;
387 if (negotiated & 0x038) /* 100mbps. */
388 tp->csr6 &= ~0x00400000;
389 if (tp->full_duplex) tp->csr6 |= 0x0200;
390 else tp->csr6 &= ~0x0200;
391 tulip_restart_rxtx(tp, tp->csr6);
392 if (tulip_debug > 0)
393 printk(KERN_INFO "%s: Setting %s-duplex based on MII"
394 "#%d link partner capability of %4.4x.\n",
395 dev->name, tp->full_duplex ? "full" : "half",
396 tp->phys[0], mii_reg5);
397 return 1;
398 }
399 return 0;
400 }
401
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