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Merge with 2.3.48.
[linux-2.6/linux-mips.git] / drivers / net / tulip / media.c
blob1d4c3b2e4d0f9725c4e684fda118f17d7a38b9b1
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 #include <asm/io.h>
18
19
20 /* This is a mysterious value that can be written to CSR11 in the 21040 (only)
21 to support a pre-NWay full-duplex signaling mechanism using short frames.
22 No one knows what it should be, but if left at its default value some
23 10base2(!) packets trigger a full-duplex-request interrupt. */
24 #define FULL_DUPLEX_MAGIC 0x6969
25
26
27 /* MII transceiver control section.
28 Read and write the MII registers using software-generated serial
29 MDIO protocol. See the MII specifications or DP83840A data sheet
30 for details. */
31
32 int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
33 {
34 struct tulip_private *tp = (struct tulip_private *)dev->priv;
35 int i;
36 int read_cmd = (0xf6 << 10) | (phy_id << 5) | location;
37 int retval = 0;
38 long ioaddr = dev->base_addr;
39 long mdio_addr = ioaddr + CSR9;
40
41 if (tp->chip_id == LC82C168) {
42 int i = 1000;
43 outl(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
44 inl(ioaddr + 0xA0);
45 inl(ioaddr + 0xA0);
46 while (--i > 0)
47 if ( ! ((retval = inl(ioaddr + 0xA0)) & 0x80000000))
48 return retval & 0xffff;
49 return 0xffff;
50 }
51
52 if (tp->chip_id == COMET) {
53 if (phy_id == 1) {
54 if (location < 7)
55 return inl(ioaddr + 0xB4 + (location<<2));
56 else if (location == 17)
57 return inl(ioaddr + 0xD0);
58 else if (location >= 29 && location <= 31)
59 return inl(ioaddr + 0xD4 + ((location-29)<<2));
60 }
61 return 0xffff;
62 }
63
64 /* Establish sync by sending at least 32 logic ones. */
65 for (i = 32; i >= 0; i--) {
66 outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
67 mdio_delay();
68 outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
69 mdio_delay();
70 }
71 /* Shift the read command bits out. */
72 for (i = 15; i >= 0; i--) {
73 int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
74
75 outl(MDIO_ENB | dataval, mdio_addr);
76 mdio_delay();
77 outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
78 mdio_delay();
79 }
80 /* Read the two transition, 16 data, and wire-idle bits. */
81 for (i = 19; i > 0; i--) {
82 outl(MDIO_ENB_IN, mdio_addr);
83 mdio_delay();
84 retval = (retval << 1) | ((inl(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
85 outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
86 mdio_delay();
87 }
88 return (retval>>1) & 0xffff;
89 }
90
91 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value)
92 {
93 struct tulip_private *tp = (struct tulip_private *)dev->priv;
94 int i;
95 int cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
96 long ioaddr = dev->base_addr;
97 long mdio_addr = ioaddr + CSR9;
98
99 if (tp->chip_id == LC82C168) {
100 int i = 1000;
101 outl(cmd, ioaddr + 0xA0);
102 do
103 if ( ! (inl(ioaddr + 0xA0) & 0x80000000))
104 break;
105 while (--i > 0);
106 return;
107 }
108
109 if (tp->chip_id == COMET) {
110 if (phy_id != 1)
111 return;
112 if (location < 7)
113 outl(value, ioaddr + 0xB4 + (location<<2));
114 else if (location == 17)
115 outl(value, ioaddr + 0xD0);
116 else if (location >= 29 && location <= 31)
117 outl(value, ioaddr + 0xD4 + ((location-29)<<2));
118 return;
119 }
120
121 /* Establish sync by sending 32 logic ones. */
122 for (i = 32; i >= 0; i--) {
123 outl(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
124 mdio_delay();
125 outl(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
126 mdio_delay();
127 }
128 /* Shift the command bits out. */
129 for (i = 31; i >= 0; i--) {
130 int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
131 outl(MDIO_ENB | dataval, mdio_addr);
132 mdio_delay();
133 outl(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
134 mdio_delay();
135 }
136 /* Clear out extra bits. */
137 for (i = 2; i > 0; i--) {
138 outl(MDIO_ENB_IN, mdio_addr);
139 mdio_delay();
140 outl(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
141 mdio_delay();
142 }
143 }
144
145
146 /* Set up the transceiver control registers for the selected media type. */
147 void tulip_select_media(struct net_device *dev, int startup)
148 {
149 long ioaddr = dev->base_addr;
150 struct tulip_private *tp = (struct tulip_private *)dev->priv;
151 struct mediatable *mtable = tp->mtable;
152 u32 new_csr6;
153 int i;
154
155 if (mtable) {
156 struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
157 unsigned char *p = mleaf->leafdata;
158 switch (mleaf->type) {
159 case 0: /* 21140 non-MII xcvr. */
160 if (tulip_debug > 1)
161 printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
162 " with control setting %2.2x.\n",
163 dev->name, p[1]);
164 dev->if_port = p[0];
165 if (startup)
166 outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
167 outl(p[1], ioaddr + CSR12);
168 new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
169 break;
170 case 2: case 4: {
171 u16 setup[5];
172 u32 csr13val, csr14val, csr15dir, csr15val;
173 for (i = 0; i < 5; i++)
174 setup[i] = get_u16(&p[i*2 + 1]);
175
176 dev->if_port = p[0] & 15;
177 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
178 tp->full_duplex = 1;
179
180 if (startup && mtable->has_reset) {
181 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
182 unsigned char *rst = rleaf->leafdata;
183 if (tulip_debug > 1)
184 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
185 dev->name);
186 for (i = 0; i < rst[0]; i++)
187 outl(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
188 }
189 if (tulip_debug > 1)
190 printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
191 "%4.4x/%4.4x.\n",
192 dev->name, medianame[dev->if_port], setup[0], setup[1]);
193 if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
194 csr13val = setup[0];
195 csr14val = setup[1];
196 csr15dir = (setup[3]<<16) | setup[2];
197 csr15val = (setup[4]<<16) | setup[2];
198 outl(0, ioaddr + CSR13);
199 outl(csr14val, ioaddr + CSR14);
200 outl(csr15dir, ioaddr + CSR15); /* Direction */
201 outl(csr15val, ioaddr + CSR15); /* Data */
202 outl(csr13val, ioaddr + CSR13);
203 } else {
204 csr13val = 1;
205 csr14val = 0x0003FF7F;
206 csr15dir = (setup[0]<<16) | 0x0008;
207 csr15val = (setup[1]<<16) | 0x0008;
208 if (dev->if_port <= 4)
209 csr14val = t21142_csr14[dev->if_port];
210 if (startup) {
211 outl(0, ioaddr + CSR13);
212 outl(csr14val, ioaddr + CSR14);
213 }
214 outl(csr15dir, ioaddr + CSR15); /* Direction */
215 outl(csr15val, ioaddr + CSR15); /* Data */
216 if (startup) outl(csr13val, ioaddr + CSR13);
217 }
218 if (tulip_debug > 1)
219 printk(KERN_DEBUG "%s: Setting CSR15 to %8.8x/%8.8x.\n",
220 dev->name, csr15dir, csr15val);
221 if (mleaf->type == 4)
222 new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
223 else
224 new_csr6 = 0x82420000;
225 break;
226 }
227 case 1: case 3: {
228 int phy_num = p[0];
229 int init_length = p[1];
230 u16 *misc_info;
231 u16 to_advertise;
232
233 dev->if_port = 11;
234 new_csr6 = 0x020E0000;
235 if (mleaf->type == 3) { /* 21142 */
236 u16 *init_sequence = (u16*)(p+2);
237 u16 *reset_sequence = &((u16*)(p+3))[init_length];
238 int reset_length = p[2 + init_length*2];
239 misc_info = reset_sequence + reset_length;
240 if (startup)
241 for (i = 0; i < reset_length; i++)
242 outl(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
243 for (i = 0; i < init_length; i++)
244 outl(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
245 } else {
246 u8 *init_sequence = p + 2;
247 u8 *reset_sequence = p + 3 + init_length;
248 int reset_length = p[2 + init_length];
249 misc_info = (u16*)(reset_sequence + reset_length);
250 if (startup) {
251 outl(mtable->csr12dir | 0x100, ioaddr + CSR12);
252 for (i = 0; i < reset_length; i++)
253 outl(reset_sequence[i], ioaddr + CSR12);
254 }
255 for (i = 0; i < init_length; i++)
256 outl(init_sequence[i], ioaddr + CSR12);
257 }
258 to_advertise = (get_u16(&misc_info[1]) & tp->to_advertise) | 1;
259 tp->advertising[phy_num] = to_advertise;
260 if (tulip_debug > 1)
261 printk(KERN_DEBUG "%s: Advertising %4.4x on PHY %d (%d).\n",
262 dev->name, to_advertise, phy_num, tp->phys[phy_num]);
263 /* Bogus: put in by a committee? */
264 tulip_mdio_write(dev, tp->phys[phy_num], 4, to_advertise);
265 break;
266 }
267 default:
268 printk(KERN_DEBUG "%s: Invalid media table selection %d.\n",
269 dev->name, mleaf->type);
270 new_csr6 = 0x020E0000;
271 }
272 if (tulip_debug > 1)
273 printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
274 dev->name, medianame[dev->if_port],
275 inl(ioaddr + CSR12) & 0xff);
276 } else if (tp->chip_id == DC21041) {
277 int port = dev->if_port <= 4 ? dev->if_port : 0;
278 if (tulip_debug > 1)
279 printk(KERN_DEBUG "%s: 21041 using media %s, CSR12 is %4.4x.\n",
280 dev->name, medianame[port == 3 ? 12: port],
281 inl(ioaddr + CSR12));
282 outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
283 outl(t21041_csr14[port], ioaddr + CSR14);
284 outl(t21041_csr15[port], ioaddr + CSR15);
285 outl(t21041_csr13[port], ioaddr + CSR13);
286 new_csr6 = 0x80020000;
287 } else if (tp->chip_id == LC82C168) {
288 if (startup && ! tp->medialock)
289 dev->if_port = tp->mii_cnt ? 11 : 0;
290 if (tulip_debug > 1)
291 printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
292 dev->name, inl(ioaddr + 0xB8), medianame[dev->if_port]);
293 if (tp->mii_cnt) {
294 new_csr6 = 0x810C0000;
295 outl(0x0001, ioaddr + CSR15);
296 outl(0x0201B07A, ioaddr + 0xB8);
297 } else if (startup) {
298 /* Start with 10mbps to do autonegotiation. */
299 outl(0x32, ioaddr + CSR12);
300 new_csr6 = 0x00420000;
301 outl(0x0001B078, ioaddr + 0xB8);
302 outl(0x0201B078, ioaddr + 0xB8);
303 } else if (dev->if_port == 3 || dev->if_port == 5) {
304 outl(0x33, ioaddr + CSR12);
305 new_csr6 = 0x01860000;
306 /* Trigger autonegotiation. */
307 outl(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
308 } else {
309 outl(0x32, ioaddr + CSR12);
310 new_csr6 = 0x00420000;
311 outl(0x1F078, ioaddr + 0xB8);
312 }
313 } else if (tp->chip_id == DC21040) { /* 21040 */
314 /* Turn on the xcvr interface. */
315 int csr12 = inl(ioaddr + CSR12);
316 if (tulip_debug > 1)
317 printk(KERN_DEBUG "%s: 21040 media type is %s, CSR12 is %2.2x.\n",
318 dev->name, medianame[dev->if_port], csr12);
319 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
320 tp->full_duplex = 1;
321 new_csr6 = 0x20000;
322 /* Set the full duplux match frame. */
323 outl(FULL_DUPLEX_MAGIC, ioaddr + CSR11);
324 outl(0x00000000, ioaddr + CSR13); /* Reset the serial interface */
325 if (t21040_csr13[dev->if_port] & 8) {
326 outl(0x0705, ioaddr + CSR14);
327 outl(0x0006, ioaddr + CSR15);
328 } else {
329 outl(0xffff, ioaddr + CSR14);
330 outl(0x0000, ioaddr + CSR15);
331 }
332 outl(0x8f01 | t21040_csr13[dev->if_port], ioaddr + CSR13);
333 } else { /* Unknown chip type with no media table. */
334 if (tp->default_port == 0)
335 dev->if_port = tp->mii_cnt ? 11 : 3;
336 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
337 new_csr6 = 0x020E0000;
338 } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
339 new_csr6 = 0x028600000;
340 } else
341 new_csr6 = 0x038600000;
342 if (tulip_debug > 1)
343 printk(KERN_DEBUG "%s: No media description table, assuming "
344 "%s transceiver, CSR12 %2.2x.\n",
345 dev->name, medianame[dev->if_port],
346 inl(ioaddr + CSR12));
347 }
348
349 tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
350 return;
351 }
352
353 /*
354 Check the MII negotiated duplex, and change the CSR6 setting if
355 required.
356 Return 0 if everything is OK.
357 Return < 0 if the transceiver is missing or has no link beat.
358 */
359 int tulip_check_duplex(struct net_device *dev)
360 {
361 struct tulip_private *tp = (struct tulip_private *)dev->priv;
362 int mii_reg1, mii_reg5, negotiated, duplex;
363
364 if (tp->full_duplex_lock)
365 return 0;
366 mii_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
367 mii_reg5 = tulip_mdio_read(dev, tp->phys[0], 5);
368 if (tulip_debug > 1)
369 printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
370 "%4.4x.\n", dev->name, mii_reg1, mii_reg5);
371 if (mii_reg1 == 0xffff)
372 return -2;
373 if ((mii_reg1 & 0x0004) == 0) {
374 int new_reg1 = tulip_mdio_read(dev, tp->phys[0], 1);
375 if ((new_reg1 & 0x0004) == 0) {
376 if (tulip_debug > 1)
377 printk(KERN_INFO "%s: No link beat on the MII interface,"
378 " status %4.4x.\n", dev->name, new_reg1);
379 return -1;
380 }
381 }
382 negotiated = mii_reg5 & tp->advertising[0];
383 duplex = ((negotiated & 0x0300) == 0x0100
384 || (negotiated & 0x00C0) == 0x0040);
385 /* 100baseTx-FD or 10T-FD, but not 100-HD */
386 if (tp->full_duplex != duplex) {
387 tp->full_duplex = duplex;
388 if (negotiated & 0x038) /* 100mbps. */
389 tp->csr6 &= ~0x00400000;
390 if (tp->full_duplex) tp->csr6 |= 0x0200;
391 else tp->csr6 &= ~0x0200;
392 tulip_outl_CSR6(tp, tp->csr6 | 0x0002);
393 tulip_outl_CSR6(tp, tp->csr6 | 0x2002);
394 if (tulip_debug > 0)
395 printk(KERN_INFO "%s: Setting %s-duplex based on MII"
396 "#%d link partner capability of %4.4x.\n",
397 dev->name, tp->full_duplex ? "full" : "half",
398 tp->phys[0], mii_reg5);
399 return 1;
400 }
401 return 0;
402 }
403
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