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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / ethernet / dec / tulip / media.c
blobbeeb17b52ad436b441dcb18a8c81f3fd50b2a8af
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 submit bugs to http://bugzilla.kernel.org/ .
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/mii.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/pci.h>
18 #include "tulip.h"
19
20
21 /* The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
22 met by back-to-back PCI I/O cycles, but we insert a delay to avoid
23 "overclocking" issues or future 66Mhz PCI. */
24 #define mdio_delay() ioread32(mdio_addr)
25
26 /* Read and write the MII registers using software-generated serial
27 MDIO protocol. It is just different enough from the EEPROM protocol
28 to not share code. The maxium data clock rate is 2.5 Mhz. */
29 #define MDIO_SHIFT_CLK 0x10000
30 #define MDIO_DATA_WRITE0 0x00000
31 #define MDIO_DATA_WRITE1 0x20000
32 #define MDIO_ENB 0x00000 /* Ignore the 0x02000 databook setting. */
33 #define MDIO_ENB_IN 0x40000
34 #define MDIO_DATA_READ 0x80000
35
36 static const unsigned char comet_miireg2offset[32] = {
37 0xB4, 0xB8, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC, 0, 0,0,0,0, 0,0,0,0,
38 0,0xD0,0,0, 0,0,0,0, 0,0,0,0, 0, 0xD4, 0xD8, 0xDC, };
39
40
41 /* MII transceiver control section.
42 Read and write the MII registers using software-generated serial
43 MDIO protocol.
44 See IEEE 802.3-2002.pdf (Section 2, Chapter "22.2.4 Management functions")
45 or DP83840A data sheet for more details.
46 */
47
48 int tulip_mdio_read(struct net_device *dev, int phy_id, int location)
49 {
50 struct tulip_private *tp = netdev_priv(dev);
51 int i;
52 int read_cmd = (0xf6 << 10) | ((phy_id & 0x1f) << 5) | location;
53 int retval = 0;
54 void __iomem *ioaddr = tp->base_addr;
55 void __iomem *mdio_addr = ioaddr + CSR9;
56 unsigned long flags;
57
58 if (location & ~0x1f)
59 return 0xffff;
60
61 if (tp->chip_id == COMET && phy_id == 30) {
62 if (comet_miireg2offset[location])
63 return ioread32(ioaddr + comet_miireg2offset[location]);
64 return 0xffff;
65 }
66
67 spin_lock_irqsave(&tp->mii_lock, flags);
68 if (tp->chip_id == LC82C168) {
69 iowrite32(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
70 ioread32(ioaddr + 0xA0);
71 ioread32(ioaddr + 0xA0);
72 for (i = 1000; i >= 0; --i) {
73 barrier();
74 if ( ! ((retval = ioread32(ioaddr + 0xA0)) & 0x80000000))
75 break;
76 }
77 spin_unlock_irqrestore(&tp->mii_lock, flags);
78 return retval & 0xffff;
79 }
80
81 /* Establish sync by sending at least 32 logic ones. */
82 for (i = 32; i >= 0; i--) {
83 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
84 mdio_delay();
85 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
86 mdio_delay();
87 }
88 /* Shift the read command bits out. */
89 for (i = 15; i >= 0; i--) {
90 int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
91
92 iowrite32(MDIO_ENB | dataval, mdio_addr);
93 mdio_delay();
94 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
95 mdio_delay();
96 }
97 /* Read the two transition, 16 data, and wire-idle bits. */
98 for (i = 19; i > 0; i--) {
99 iowrite32(MDIO_ENB_IN, mdio_addr);
100 mdio_delay();
101 retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
102 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
103 mdio_delay();
104 }
105
106 spin_unlock_irqrestore(&tp->mii_lock, flags);
107 return (retval>>1) & 0xffff;
108 }
109
110 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val)
111 {
112 struct tulip_private *tp = netdev_priv(dev);
113 int i;
114 int cmd = (0x5002 << 16) | ((phy_id & 0x1f) << 23) | (location<<18) | (val & 0xffff);
115 void __iomem *ioaddr = tp->base_addr;
116 void __iomem *mdio_addr = ioaddr + CSR9;
117 unsigned long flags;
118
119 if (location & ~0x1f)
120 return;
121
122 if (tp->chip_id == COMET && phy_id == 30) {
123 if (comet_miireg2offset[location])
124 iowrite32(val, ioaddr + comet_miireg2offset[location]);
125 return;
126 }
127
128 spin_lock_irqsave(&tp->mii_lock, flags);
129 if (tp->chip_id == LC82C168) {
130 iowrite32(cmd, ioaddr + 0xA0);
131 for (i = 1000; i >= 0; --i) {
132 barrier();
133 if ( ! (ioread32(ioaddr + 0xA0) & 0x80000000))
134 break;
135 }
136 spin_unlock_irqrestore(&tp->mii_lock, flags);
137 return;
138 }
139
140 /* Establish sync by sending 32 logic ones. */
141 for (i = 32; i >= 0; i--) {
142 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
143 mdio_delay();
144 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
145 mdio_delay();
146 }
147 /* Shift the command bits out. */
148 for (i = 31; i >= 0; i--) {
149 int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
150 iowrite32(MDIO_ENB | dataval, mdio_addr);
151 mdio_delay();
152 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
153 mdio_delay();
154 }
155 /* Clear out extra bits. */
156 for (i = 2; i > 0; i--) {
157 iowrite32(MDIO_ENB_IN, mdio_addr);
158 mdio_delay();
159 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
160 mdio_delay();
161 }
162
163 spin_unlock_irqrestore(&tp->mii_lock, flags);
164 }
165
166
167 /* Set up the transceiver control registers for the selected media type. */
168 void tulip_select_media(struct net_device *dev, int startup)
169 {
170 struct tulip_private *tp = netdev_priv(dev);
171 void __iomem *ioaddr = tp->base_addr;
172 struct mediatable *mtable = tp->mtable;
173 u32 new_csr6;
174 int i;
175
176 if (mtable) {
177 struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
178 unsigned char *p = mleaf->leafdata;
179 switch (mleaf->type) {
180 case 0: /* 21140 non-MII xcvr. */
181 if (tulip_debug > 1)
182 netdev_dbg(dev, "Using a 21140 non-MII transceiver with control setting %02x\n",
183 p[1]);
184 dev->if_port = p[0];
185 if (startup)
186 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
187 iowrite32(p[1], ioaddr + CSR12);
188 new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
189 break;
190 case 2: case 4: {
191 u16 setup[5];
192 u32 csr13val, csr14val, csr15dir, csr15val;
193 for (i = 0; i < 5; i++)
194 setup[i] = get_u16(&p[i*2 + 1]);
195
196 dev->if_port = p[0] & MEDIA_MASK;
197 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
198 tp->full_duplex = 1;
199
200 if (startup && mtable->has_reset) {
201 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
202 unsigned char *rst = rleaf->leafdata;
203 if (tulip_debug > 1)
204 netdev_dbg(dev, "Resetting the transceiver\n");
205 for (i = 0; i < rst[0]; i++)
206 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
207 }
208 if (tulip_debug > 1)
209 netdev_dbg(dev, "21143 non-MII %s transceiver control %04x/%04x\n",
210 medianame[dev->if_port],
211 setup[0], setup[1]);
212 if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
213 csr13val = setup[0];
214 csr14val = setup[1];
215 csr15dir = (setup[3]<<16) | setup[2];
216 csr15val = (setup[4]<<16) | setup[2];
217 iowrite32(0, ioaddr + CSR13);
218 iowrite32(csr14val, ioaddr + CSR14);
219 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
220 iowrite32(csr15val, ioaddr + CSR15); /* Data */
221 iowrite32(csr13val, ioaddr + CSR13);
222 } else {
223 csr13val = 1;
224 csr14val = 0;
225 csr15dir = (setup[0]<<16) | 0x0008;
226 csr15val = (setup[1]<<16) | 0x0008;
227 if (dev->if_port <= 4)
228 csr14val = t21142_csr14[dev->if_port];
229 if (startup) {
230 iowrite32(0, ioaddr + CSR13);
231 iowrite32(csr14val, ioaddr + CSR14);
232 }
233 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
234 iowrite32(csr15val, ioaddr + CSR15); /* Data */
235 if (startup) iowrite32(csr13val, ioaddr + CSR13);
236 }
237 if (tulip_debug > 1)
238 netdev_dbg(dev, "Setting CSR15 to %08x/%08x\n",
239 csr15dir, csr15val);
240 if (mleaf->type == 4)
241 new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
242 else
243 new_csr6 = 0x82420000;
244 break;
245 }
246 case 1: case 3: {
247 int phy_num = p[0];
248 int init_length = p[1];
249 u16 *misc_info, tmp_info;
250
251 dev->if_port = 11;
252 new_csr6 = 0x020E0000;
253 if (mleaf->type == 3) { /* 21142 */
254 u16 *init_sequence = (u16*)(p+2);
255 u16 *reset_sequence = &((u16*)(p+3))[init_length];
256 int reset_length = p[2 + init_length*2];
257 misc_info = reset_sequence + reset_length;
258 if (startup) {
259 int timeout = 10; /* max 1 ms */
260 for (i = 0; i < reset_length; i++)
261 iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
262
263 /* flush posted writes */
264 ioread32(ioaddr + CSR15);
265
266 /* Sect 3.10.3 in DP83840A.pdf (p39) */
267 udelay(500);
268
269 /* Section 4.2 in DP83840A.pdf (p43) */
270 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
271 while (timeout-- &&
272 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
273 udelay(100);
274 }
275 for (i = 0; i < init_length; i++)
276 iowrite32(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
277
278 ioread32(ioaddr + CSR15); /* flush posted writes */
279 } else {
280 u8 *init_sequence = p + 2;
281 u8 *reset_sequence = p + 3 + init_length;
282 int reset_length = p[2 + init_length];
283 misc_info = (u16*)(reset_sequence + reset_length);
284 if (startup) {
285 int timeout = 10; /* max 1 ms */
286 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
287 for (i = 0; i < reset_length; i++)
288 iowrite32(reset_sequence[i], ioaddr + CSR12);
289
290 /* flush posted writes */
291 ioread32(ioaddr + CSR12);
292
293 /* Sect 3.10.3 in DP83840A.pdf (p39) */
294 udelay(500);
295
296 /* Section 4.2 in DP83840A.pdf (p43) */
297 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
298 while (timeout-- &&
299 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
300 udelay(100);
301 }
302 for (i = 0; i < init_length; i++)
303 iowrite32(init_sequence[i], ioaddr + CSR12);
304
305 ioread32(ioaddr + CSR12); /* flush posted writes */
306 }
307
308 tmp_info = get_u16(&misc_info[1]);
309 if (tmp_info)
310 tp->advertising[phy_num] = tmp_info | 1;
311 if (tmp_info && startup < 2) {
312 if (tp->mii_advertise == 0)
313 tp->mii_advertise = tp->advertising[phy_num];
314 if (tulip_debug > 1)
315 netdev_dbg(dev, " Advertising %04x on MII %d\n",
316 tp->mii_advertise,
317 tp->phys[phy_num]);
318 tulip_mdio_write(dev, tp->phys[phy_num], 4, tp->mii_advertise);
319 }
320 break;
321 }
322 case 5: case 6: {
323 u16 setup[5];
324
325 new_csr6 = 0; /* FIXME */
326
327 for (i = 0; i < 5; i++)
328 setup[i] = get_u16(&p[i*2 + 1]);
329
330 if (startup && mtable->has_reset) {
331 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
332 unsigned char *rst = rleaf->leafdata;
333 if (tulip_debug > 1)
334 netdev_dbg(dev, "Resetting the transceiver\n");
335 for (i = 0; i < rst[0]; i++)
336 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
337 }
338
339 break;
340 }
341 default:
342 netdev_dbg(dev, " Invalid media table selection %d\n",
343 mleaf->type);
344 new_csr6 = 0x020E0000;
345 }
346 if (tulip_debug > 1)
347 netdev_dbg(dev, "Using media type %s, CSR12 is %02x\n",
348 medianame[dev->if_port],
349 ioread32(ioaddr + CSR12) & 0xff);
350 } else if (tp->chip_id == LC82C168) {
351 if (startup && ! tp->medialock)
352 dev->if_port = tp->mii_cnt ? 11 : 0;
353 if (tulip_debug > 1)
354 netdev_dbg(dev, "PNIC PHY status is %3.3x, media %s\n",
355 ioread32(ioaddr + 0xB8),
356 medianame[dev->if_port]);
357 if (tp->mii_cnt) {
358 new_csr6 = 0x810C0000;
359 iowrite32(0x0001, ioaddr + CSR15);
360 iowrite32(0x0201B07A, ioaddr + 0xB8);
361 } else if (startup) {
362 /* Start with 10mbps to do autonegotiation. */
363 iowrite32(0x32, ioaddr + CSR12);
364 new_csr6 = 0x00420000;
365 iowrite32(0x0001B078, ioaddr + 0xB8);
366 iowrite32(0x0201B078, ioaddr + 0xB8);
367 } else if (dev->if_port == 3 || dev->if_port == 5) {
368 iowrite32(0x33, ioaddr + CSR12);
369 new_csr6 = 0x01860000;
370 /* Trigger autonegotiation. */
371 iowrite32(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
372 } else {
373 iowrite32(0x32, ioaddr + CSR12);
374 new_csr6 = 0x00420000;
375 iowrite32(0x1F078, ioaddr + 0xB8);
376 }
377 } else { /* Unknown chip type with no media table. */
378 if (tp->default_port == 0)
379 dev->if_port = tp->mii_cnt ? 11 : 3;
380 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
381 new_csr6 = 0x020E0000;
382 } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
383 new_csr6 = 0x02860000;
384 } else
385 new_csr6 = 0x03860000;
386 if (tulip_debug > 1)
387 netdev_dbg(dev, "No media description table, assuming %s transceiver, CSR12 %02x\n",
388 medianame[dev->if_port],
389 ioread32(ioaddr + CSR12));
390 }
391
392 tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
393
394 mdelay(1);
395 }
396
397 /*
398 Check the MII negotiated duplex and change the CSR6 setting if
399 required.
400 Return 0 if everything is OK.
401 Return < 0 if the transceiver is missing or has no link beat.
402 */
403 int tulip_check_duplex(struct net_device *dev)
404 {
405 struct tulip_private *tp = netdev_priv(dev);
406 unsigned int bmsr, lpa, negotiated, new_csr6;
407
408 bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
409 lpa = tulip_mdio_read(dev, tp->phys[0], MII_LPA);
410 if (tulip_debug > 1)
411 dev_info(&dev->dev, "MII status %04x, Link partner report %04x\n",
412 bmsr, lpa);
413 if (bmsr == 0xffff)
414 return -2;
415 if ((bmsr & BMSR_LSTATUS) == 0) {
416 int new_bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
417 if ((new_bmsr & BMSR_LSTATUS) == 0) {
418 if (tulip_debug > 1)
419 dev_info(&dev->dev,
420 "No link beat on the MII interface, status %04x\n",
421 new_bmsr);
422 return -1;
423 }
424 }
425 negotiated = lpa & tp->advertising[0];
426 tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated);
427
428 new_csr6 = tp->csr6;
429
430 if (negotiated & LPA_100) new_csr6 &= ~TxThreshold;
431 else new_csr6 |= TxThreshold;
432 if (tp->full_duplex) new_csr6 |= FullDuplex;
433 else new_csr6 &= ~FullDuplex;
434
435 if (new_csr6 != tp->csr6) {
436 tp->csr6 = new_csr6;
437 tulip_restart_rxtx(tp);
438
439 if (tulip_debug > 0)
440 dev_info(&dev->dev,
441 "Setting %s-duplex based on MII#%d link partner capability of %04x\n",
442 tp->full_duplex ? "full" : "half",
443 tp->phys[0], lpa);
444 return 1;
445 }
446
447 return 0;
448 }
449
450 void __devinit tulip_find_mii (struct net_device *dev, int board_idx)
451 {
452 struct tulip_private *tp = netdev_priv(dev);
453 int phyn, phy_idx = 0;
454 int mii_reg0;
455 int mii_advert;
456 unsigned int to_advert, new_bmcr, ane_switch;
457
458 /* Find the connected MII xcvrs.
459 Doing this in open() would allow detecting external xcvrs later,
460 but takes much time. */
461 for (phyn = 1; phyn <= 32 && phy_idx < sizeof (tp->phys); phyn++) {
462 int phy = phyn & 0x1f;
463 int mii_status = tulip_mdio_read (dev, phy, MII_BMSR);
464 if ((mii_status & 0x8301) == 0x8001 ||
465 ((mii_status & BMSR_100BASE4) == 0 &&
466 (mii_status & 0x7800) != 0)) {
467 /* preserve Becker logic, gain indentation level */
468 } else {
469 continue;
470 }
471
472 mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR);
473 mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE);
474 ane_switch = 0;
475
476 /* if not advertising at all, gen an
477 * advertising value from the capability
478 * bits in BMSR
479 */
480 if ((mii_advert & ADVERTISE_ALL) == 0) {
481 unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR);
482 mii_advert = ((tmpadv >> 6) & 0x3e0) | 1;
483 }
484
485 if (tp->mii_advertise) {
486 tp->advertising[phy_idx] =
487 to_advert = tp->mii_advertise;
488 } else if (tp->advertising[phy_idx]) {
489 to_advert = tp->advertising[phy_idx];
490 } else {
491 tp->advertising[phy_idx] =
492 tp->mii_advertise =
493 to_advert = mii_advert;
494 }
495
496 tp->phys[phy_idx++] = phy;
497
498 pr_info("tulip%d: MII transceiver #%d config %04x status %04x advertising %04x\n",
499 board_idx, phy, mii_reg0, mii_status, mii_advert);
500
501 /* Fixup for DLink with miswired PHY. */
502 if (mii_advert != to_advert) {
503 pr_debug("tulip%d: Advertising %04x on PHY %d, previously advertising %04x\n",
504 board_idx, to_advert, phy, mii_advert);
505 tulip_mdio_write (dev, phy, 4, to_advert);
506 }
507
508 /* Enable autonegotiation: some boards default to off. */
509 if (tp->default_port == 0) {
510 new_bmcr = mii_reg0 | BMCR_ANENABLE;
511 if (new_bmcr != mii_reg0) {
512 new_bmcr |= BMCR_ANRESTART;
513 ane_switch = 1;
514 }
515 }
516 /* ...or disable nway, if forcing media */
517 else {
518 new_bmcr = mii_reg0 & ~BMCR_ANENABLE;
519 if (new_bmcr != mii_reg0)
520 ane_switch = 1;
521 }
522
523 /* clear out bits we never want at this point */
524 new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE |
525 BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK |
526 BMCR_RESET);
527
528 if (tp->full_duplex)
529 new_bmcr |= BMCR_FULLDPLX;
530 if (tulip_media_cap[tp->default_port] & MediaIs100)
531 new_bmcr |= BMCR_SPEED100;
532
533 if (new_bmcr != mii_reg0) {
534 /* some phys need the ANE switch to
535 * happen before forced media settings
536 * will "take." However, we write the
537 * same value twice in order not to
538 * confuse the sane phys.
539 */
540 if (ane_switch) {
541 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
542 udelay (10);
543 }
544 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
545 }
546 }
547 tp->mii_cnt = phy_idx;
548 if (tp->mtable && tp->mtable->has_mii && phy_idx == 0) {
549 pr_info("tulip%d: ***WARNING***: No MII transceiver found!\n",
550 board_idx);
551 tp->phys[0] = 1;
552 }
553 }