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libertas: convert SNMP_MIB to a direct command
[linux/fpc-iii.git] / drivers / net / tulip / media.c
blob91cf9c863910600b8c910e51196cb3ed6c16aa50
1 /*
2 drivers/net/tulip/media.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 refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
11 for more information on this driver.
12
13 Please submit bugs to http://bugzilla.kernel.org/ .
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/mii.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/pci.h>
21 #include "tulip.h"
22
23
24 /* The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
25 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
26 "overclocking" issues or future 66Mhz PCI. */
27 #define mdio_delay() ioread32(mdio_addr)
28
29 /* Read and write the MII registers using software-generated serial
30 MDIO protocol. It is just different enough from the EEPROM protocol
31 to not share code. The maxium data clock rate is 2.5 Mhz. */
32 #define MDIO_SHIFT_CLK 0x10000
33 #define MDIO_DATA_WRITE0 0x00000
34 #define MDIO_DATA_WRITE1 0x20000
35 #define MDIO_ENB 0x00000 /* Ignore the 0x02000 databook setting. */
36 #define MDIO_ENB_IN 0x40000
37 #define MDIO_DATA_READ 0x80000
38
39 static const unsigned char comet_miireg2offset[32] = {
40 0xB4, 0xB8, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC, 0, 0,0,0,0, 0,0,0,0,
41 0,0xD0,0,0, 0,0,0,0, 0,0,0,0, 0, 0xD4, 0xD8, 0xDC, };
42
43
44 /* MII transceiver control section.
45 Read and write the MII registers using software-generated serial
46 MDIO protocol.
47 See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions")
48 or DP83840A data sheet for more details.
49 */
50
51 int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
52 {
53 struct tulip_private *tp = netdev_priv(dev);
54 int i;
55 int read_cmd = (0xf6 << 10) | ((phy_id & 0x1f) << 5) | location;
56 int retval = 0;
57 void __iomem *ioaddr = tp->base_addr;
58 void __iomem *mdio_addr = ioaddr + CSR9;
59 unsigned long flags;
60
61 if (location & ~0x1f)
62 return 0xffff;
63
64 if (tp->chip_id == COMET && phy_id == 30) {
65 if (comet_miireg2offset[location])
66 return ioread32(ioaddr + comet_miireg2offset[location]);
67 return 0xffff;
68 }
69
70 spin_lock_irqsave(&tp->mii_lock, flags);
71 if (tp->chip_id == LC82C168) {
72 int i = 1000;
73 iowrite32(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
74 ioread32(ioaddr + 0xA0);
75 ioread32(ioaddr + 0xA0);
76 while (--i > 0) {
77 barrier();
78 if ( ! ((retval = ioread32(ioaddr + 0xA0)) & 0x80000000))
79 break;
80 }
81 spin_unlock_irqrestore(&tp->mii_lock, flags);
82 return retval & 0xffff;
83 }
84
85 /* Establish sync by sending at least 32 logic ones. */
86 for (i = 32; i >= 0; i--) {
87 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
88 mdio_delay();
89 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
90 mdio_delay();
91 }
92 /* Shift the read command bits out. */
93 for (i = 15; i >= 0; i--) {
94 int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
95
96 iowrite32(MDIO_ENB | dataval, mdio_addr);
97 mdio_delay();
98 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
99 mdio_delay();
100 }
101 /* Read the two transition, 16 data, and wire-idle bits. */
102 for (i = 19; i > 0; i--) {
103 iowrite32(MDIO_ENB_IN, mdio_addr);
104 mdio_delay();
105 retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
106 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
107 mdio_delay();
108 }
109
110 spin_unlock_irqrestore(&tp->mii_lock, flags);
111 return (retval>>1) & 0xffff;
112 }
113
114 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val)
115 {
116 struct tulip_private *tp = netdev_priv(dev);
117 int i;
118 int cmd = (0x5002 << 16) | ((phy_id & 0x1f) << 23) | (location<<18) | (val & 0xffff);
119 void __iomem *ioaddr = tp->base_addr;
120 void __iomem *mdio_addr = ioaddr + CSR9;
121 unsigned long flags;
122
123 if (location & ~0x1f)
124 return;
125
126 if (tp->chip_id == COMET && phy_id == 30) {
127 if (comet_miireg2offset[location])
128 iowrite32(val, ioaddr + comet_miireg2offset[location]);
129 return;
130 }
131
132 spin_lock_irqsave(&tp->mii_lock, flags);
133 if (tp->chip_id == LC82C168) {
134 int i = 1000;
135 iowrite32(cmd, ioaddr + 0xA0);
136 do {
137 barrier();
138 if ( ! (ioread32(ioaddr + 0xA0) & 0x80000000))
139 break;
140 } while (--i > 0);
141 spin_unlock_irqrestore(&tp->mii_lock, flags);
142 return;
143 }
144
145 /* Establish sync by sending 32 logic ones. */
146 for (i = 32; i >= 0; i--) {
147 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
148 mdio_delay();
149 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
150 mdio_delay();
151 }
152 /* Shift the command bits out. */
153 for (i = 31; i >= 0; i--) {
154 int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
155 iowrite32(MDIO_ENB | dataval, mdio_addr);
156 mdio_delay();
157 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
158 mdio_delay();
159 }
160 /* Clear out extra bits. */
161 for (i = 2; i > 0; i--) {
162 iowrite32(MDIO_ENB_IN, mdio_addr);
163 mdio_delay();
164 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
165 mdio_delay();
166 }
167
168 spin_unlock_irqrestore(&tp->mii_lock, flags);
169 }
170
171
172 /* Set up the transceiver control registers for the selected media type. */
173 void tulip_select_media(struct net_device *dev, int startup)
174 {
175 struct tulip_private *tp = netdev_priv(dev);
176 void __iomem *ioaddr = tp->base_addr;
177 struct mediatable *mtable = tp->mtable;
178 u32 new_csr6;
179 int i;
180
181 if (mtable) {
182 struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
183 unsigned char *p = mleaf->leafdata;
184 switch (mleaf->type) {
185 case 0: /* 21140 non-MII xcvr. */
186 if (tulip_debug > 1)
187 printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
188 " with control setting %2.2x.\n",
189 dev->name, p[1]);
190 dev->if_port = p[0];
191 if (startup)
192 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
193 iowrite32(p[1], ioaddr + CSR12);
194 new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
195 break;
196 case 2: case 4: {
197 u16 setup[5];
198 u32 csr13val, csr14val, csr15dir, csr15val;
199 for (i = 0; i < 5; i++)
200 setup[i] = get_u16(&p[i*2 + 1]);
201
202 dev->if_port = p[0] & MEDIA_MASK;
203 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
204 tp->full_duplex = 1;
205
206 if (startup && mtable->has_reset) {
207 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
208 unsigned char *rst = rleaf->leafdata;
209 if (tulip_debug > 1)
210 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
211 dev->name);
212 for (i = 0; i < rst[0]; i++)
213 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
214 }
215 if (tulip_debug > 1)
216 printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
217 "%4.4x/%4.4x.\n",
218 dev->name, medianame[dev->if_port], setup[0], setup[1]);
219 if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
220 csr13val = setup[0];
221 csr14val = setup[1];
222 csr15dir = (setup[3]<<16) | setup[2];
223 csr15val = (setup[4]<<16) | setup[2];
224 iowrite32(0, ioaddr + CSR13);
225 iowrite32(csr14val, ioaddr + CSR14);
226 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
227 iowrite32(csr15val, ioaddr + CSR15); /* Data */
228 iowrite32(csr13val, ioaddr + CSR13);
229 } else {
230 csr13val = 1;
231 csr14val = 0;
232 csr15dir = (setup[0]<<16) | 0x0008;
233 csr15val = (setup[1]<<16) | 0x0008;
234 if (dev->if_port <= 4)
235 csr14val = t21142_csr14[dev->if_port];
236 if (startup) {
237 iowrite32(0, ioaddr + CSR13);
238 iowrite32(csr14val, ioaddr + CSR14);
239 }
240 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
241 iowrite32(csr15val, ioaddr + CSR15); /* Data */
242 if (startup) iowrite32(csr13val, ioaddr + CSR13);
243 }
244 if (tulip_debug > 1)
245 printk(KERN_DEBUG "%s: Setting CSR15 to %8.8x/%8.8x.\n",
246 dev->name, csr15dir, csr15val);
247 if (mleaf->type == 4)
248 new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
249 else
250 new_csr6 = 0x82420000;
251 break;
252 }
253 case 1: case 3: {
254 int phy_num = p[0];
255 int init_length = p[1];
256 u16 *misc_info, tmp_info;
257
258 dev->if_port = 11;
259 new_csr6 = 0x020E0000;
260 if (mleaf->type == 3) { /* 21142 */
261 u16 *init_sequence = (u16*)(p+2);
262 u16 *reset_sequence = &((u16*)(p+3))[init_length];
263 int reset_length = p[2 + init_length*2];
264 misc_info = reset_sequence + reset_length;
265 if (startup) {
266 int timeout = 10; /* max 1 ms */
267 for (i = 0; i < reset_length; i++)
268 iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
269
270 /* flush posted writes */
271 ioread32(ioaddr + CSR15);
272
273 /* Sect 3.10.3 in DP83840A.pdf (p39) */
274 udelay(500);
275
276 /* Section 4.2 in DP83840A.pdf (p43) */
277 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
278 while (timeout-- &&
279 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
280 udelay(100);
281 }
282 for (i = 0; i < init_length; i++)
283 iowrite32(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
284
285 ioread32(ioaddr + CSR15); /* flush posted writes */
286 } else {
287 u8 *init_sequence = p + 2;
288 u8 *reset_sequence = p + 3 + init_length;
289 int reset_length = p[2 + init_length];
290 misc_info = (u16*)(reset_sequence + reset_length);
291 if (startup) {
292 int timeout = 10; /* max 1 ms */
293 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
294 for (i = 0; i < reset_length; i++)
295 iowrite32(reset_sequence[i], ioaddr + CSR12);
296
297 /* flush posted writes */
298 ioread32(ioaddr + CSR12);
299
300 /* Sect 3.10.3 in DP83840A.pdf (p39) */
301 udelay(500);
302
303 /* Section 4.2 in DP83840A.pdf (p43) */
304 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
305 while (timeout-- &&
306 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
307 udelay(100);
308 }
309 for (i = 0; i < init_length; i++)
310 iowrite32(init_sequence[i], ioaddr + CSR12);
311
312 ioread32(ioaddr + CSR12); /* flush posted writes */
313 }
314
315 tmp_info = get_u16(&misc_info[1]);
316 if (tmp_info)
317 tp->advertising[phy_num] = tmp_info | 1;
318 if (tmp_info && startup < 2) {
319 if (tp->mii_advertise == 0)
320 tp->mii_advertise = tp->advertising[phy_num];
321 if (tulip_debug > 1)
322 printk(KERN_DEBUG "%s: Advertising %4.4x on MII %d.\n",
323 dev->name, tp->mii_advertise, tp->phys[phy_num]);
324 tulip_mdio_write(dev, tp->phys[phy_num], 4, tp->mii_advertise);
325 }
326 break;
327 }
328 case 5: case 6: {
329 u16 setup[5];
330
331 new_csr6 = 0; /* FIXME */
332
333 for (i = 0; i < 5; i++)
334 setup[i] = get_u16(&p[i*2 + 1]);
335
336 if (startup && mtable->has_reset) {
337 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
338 unsigned char *rst = rleaf->leafdata;
339 if (tulip_debug > 1)
340 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
341 dev->name);
342 for (i = 0; i < rst[0]; i++)
343 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
344 }
345
346 break;
347 }
348 default:
349 printk(KERN_DEBUG "%s: Invalid media table selection %d.\n",
350 dev->name, mleaf->type);
351 new_csr6 = 0x020E0000;
352 }
353 if (tulip_debug > 1)
354 printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
355 dev->name, medianame[dev->if_port],
356 ioread32(ioaddr + CSR12) & 0xff);
357 } else if (tp->chip_id == LC82C168) {
358 if (startup && ! tp->medialock)
359 dev->if_port = tp->mii_cnt ? 11 : 0;
360 if (tulip_debug > 1)
361 printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
362 dev->name, ioread32(ioaddr + 0xB8), medianame[dev->if_port]);
363 if (tp->mii_cnt) {
364 new_csr6 = 0x810C0000;
365 iowrite32(0x0001, ioaddr + CSR15);
366 iowrite32(0x0201B07A, ioaddr + 0xB8);
367 } else if (startup) {
368 /* Start with 10mbps to do autonegotiation. */
369 iowrite32(0x32, ioaddr + CSR12);
370 new_csr6 = 0x00420000;
371 iowrite32(0x0001B078, ioaddr + 0xB8);
372 iowrite32(0x0201B078, ioaddr + 0xB8);
373 } else if (dev->if_port == 3 || dev->if_port == 5) {
374 iowrite32(0x33, ioaddr + CSR12);
375 new_csr6 = 0x01860000;
376 /* Trigger autonegotiation. */
377 iowrite32(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
378 } else {
379 iowrite32(0x32, ioaddr + CSR12);
380 new_csr6 = 0x00420000;
381 iowrite32(0x1F078, ioaddr + 0xB8);
382 }
383 } else { /* Unknown chip type with no media table. */
384 if (tp->default_port == 0)
385 dev->if_port = tp->mii_cnt ? 11 : 3;
386 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
387 new_csr6 = 0x020E0000;
388 } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
389 new_csr6 = 0x02860000;
390 } else
391 new_csr6 = 0x03860000;
392 if (tulip_debug > 1)
393 printk(KERN_DEBUG "%s: No media description table, assuming "
394 "%s transceiver, CSR12 %2.2x.\n",
395 dev->name, medianame[dev->if_port],
396 ioread32(ioaddr + CSR12));
397 }
398
399 tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
400
401 mdelay(1);
402
403 return;
404 }
405
406 /*
407 Check the MII negotiated duplex and change the CSR6 setting if
408 required.
409 Return 0 if everything is OK.
410 Return < 0 if the transceiver is missing or has no link beat.
411 */
412 int tulip_check_duplex(struct net_device *dev)
413 {
414 struct tulip_private *tp = netdev_priv(dev);
415 unsigned int bmsr, lpa, negotiated, new_csr6;
416
417 bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
418 lpa = tulip_mdio_read(dev, tp->phys[0], MII_LPA);
419 if (tulip_debug > 1)
420 printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
421 "%4.4x.\n", dev->name, bmsr, lpa);
422 if (bmsr == 0xffff)
423 return -2;
424 if ((bmsr & BMSR_LSTATUS) == 0) {
425 int new_bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
426 if ((new_bmsr & BMSR_LSTATUS) == 0) {
427 if (tulip_debug > 1)
428 printk(KERN_INFO "%s: No link beat on the MII interface,"
429 " status %4.4x.\n", dev->name, new_bmsr);
430 return -1;
431 }
432 }
433 negotiated = lpa & tp->advertising[0];
434 tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated);
435
436 new_csr6 = tp->csr6;
437
438 if (negotiated & LPA_100) new_csr6 &= ~TxThreshold;
439 else new_csr6 |= TxThreshold;
440 if (tp->full_duplex) new_csr6 |= FullDuplex;
441 else new_csr6 &= ~FullDuplex;
442
443 if (new_csr6 != tp->csr6) {
444 tp->csr6 = new_csr6;
445 tulip_restart_rxtx(tp);
446
447 if (tulip_debug > 0)
448 printk(KERN_INFO "%s: Setting %s-duplex based on MII"
449 "#%d link partner capability of %4.4x.\n",
450 dev->name, tp->full_duplex ? "full" : "half",
451 tp->phys[0], lpa);
452 return 1;
453 }
454
455 return 0;
456 }
457
458 void __devinit tulip_find_mii (struct net_device *dev, int board_idx)
459 {
460 struct tulip_private *tp = netdev_priv(dev);
461 int phyn, phy_idx = 0;
462 int mii_reg0;
463 int mii_advert;
464 unsigned int to_advert, new_bmcr, ane_switch;
465
466 /* Find the connected MII xcvrs.
467 Doing this in open() would allow detecting external xcvrs later,
468 but takes much time. */
469 for (phyn = 1; phyn <= 32 && phy_idx < sizeof (tp->phys); phyn++) {
470 int phy = phyn & 0x1f;
471 int mii_status = tulip_mdio_read (dev, phy, MII_BMSR);
472 if ((mii_status & 0x8301) == 0x8001 ||
473 ((mii_status & BMSR_100BASE4) == 0
474 && (mii_status & 0x7800) != 0)) {
475 /* preserve Becker logic, gain indentation level */
476 } else {
477 continue;
478 }
479
480 mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR);
481 mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE);
482 ane_switch = 0;
483
484 /* if not advertising at all, gen an
485 * advertising value from the capability
486 * bits in BMSR
487 */
488 if ((mii_advert & ADVERTISE_ALL) == 0) {
489 unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR);
490 mii_advert = ((tmpadv >> 6) & 0x3e0) | 1;
491 }
492
493 if (tp->mii_advertise) {
494 tp->advertising[phy_idx] =
495 to_advert = tp->mii_advertise;
496 } else if (tp->advertising[phy_idx]) {
497 to_advert = tp->advertising[phy_idx];
498 } else {
499 tp->advertising[phy_idx] =
500 tp->mii_advertise =
501 to_advert = mii_advert;
502 }
503
504 tp->phys[phy_idx++] = phy;
505
506 printk (KERN_INFO "tulip%d: MII transceiver #%d "
507 "config %4.4x status %4.4x advertising %4.4x.\n",
508 board_idx, phy, mii_reg0, mii_status, mii_advert);
509
510 /* Fixup for DLink with miswired PHY. */
511 if (mii_advert != to_advert) {
512 printk (KERN_DEBUG "tulip%d: Advertising %4.4x on PHY %d,"
513 " previously advertising %4.4x.\n",
514 board_idx, to_advert, phy, mii_advert);
515 tulip_mdio_write (dev, phy, 4, to_advert);
516 }
517
518 /* Enable autonegotiation: some boards default to off. */
519 if (tp->default_port == 0) {
520 new_bmcr = mii_reg0 | BMCR_ANENABLE;
521 if (new_bmcr != mii_reg0) {
522 new_bmcr |= BMCR_ANRESTART;
523 ane_switch = 1;
524 }
525 }
526 /* ...or disable nway, if forcing media */
527 else {
528 new_bmcr = mii_reg0 & ~BMCR_ANENABLE;
529 if (new_bmcr != mii_reg0)
530 ane_switch = 1;
531 }
532
533 /* clear out bits we never want at this point */
534 new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE |
535 BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK |
536 BMCR_RESET);
537
538 if (tp->full_duplex)
539 new_bmcr |= BMCR_FULLDPLX;
540 if (tulip_media_cap[tp->default_port] & MediaIs100)
541 new_bmcr |= BMCR_SPEED100;
542
543 if (new_bmcr != mii_reg0) {
544 /* some phys need the ANE switch to
545 * happen before forced media settings
546 * will "take." However, we write the
547 * same value twice in order not to
548 * confuse the sane phys.
549 */
550 if (ane_switch) {
551 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
552 udelay (10);
553 }
554 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
555 }
556 }
557 tp->mii_cnt = phy_idx;
558 if (tp->mtable && tp->mtable->has_mii && phy_idx == 0) {
559 printk (KERN_INFO "tulip%d: ***WARNING***: No MII transceiver found!\n",
560 board_idx);
561 tp->phys[0] = 1;
562 }
563 }
Linux with added FPC-III support