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NET: cdc-phonet, handle empty phonet header
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / tulip / media.c
blobd8fda83705bf3e1434ee976fdc80fe78b32eeeff
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 iowrite32(0x60020000 + (phy_id<<23) + (location<<18), ioaddr + 0xA0);
73 ioread32(ioaddr + 0xA0);
74 ioread32(ioaddr + 0xA0);
75 for (i = 1000; i >= 0; --i) {
76 barrier();
77 if ( ! ((retval = ioread32(ioaddr + 0xA0)) & 0x80000000))
78 break;
79 }
80 spin_unlock_irqrestore(&tp->mii_lock, flags);
81 return retval & 0xffff;
82 }
83
84 /* Establish sync by sending at least 32 logic ones. */
85 for (i = 32; i >= 0; i--) {
86 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
87 mdio_delay();
88 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
89 mdio_delay();
90 }
91 /* Shift the read command bits out. */
92 for (i = 15; i >= 0; i--) {
93 int dataval = (read_cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
94
95 iowrite32(MDIO_ENB | dataval, mdio_addr);
96 mdio_delay();
97 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
98 mdio_delay();
99 }
100 /* Read the two transition, 16 data, and wire-idle bits. */
101 for (i = 19; i > 0; i--) {
102 iowrite32(MDIO_ENB_IN, mdio_addr);
103 mdio_delay();
104 retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DATA_READ) ? 1 : 0);
105 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
106 mdio_delay();
107 }
108
109 spin_unlock_irqrestore(&tp->mii_lock, flags);
110 return (retval>>1) & 0xffff;
111 }
112
113 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int val)
114 {
115 struct tulip_private *tp = netdev_priv(dev);
116 int i;
117 int cmd = (0x5002 << 16) | ((phy_id & 0x1f) << 23) | (location<<18) | (val & 0xffff);
118 void __iomem *ioaddr = tp->base_addr;
119 void __iomem *mdio_addr = ioaddr + CSR9;
120 unsigned long flags;
121
122 if (location & ~0x1f)
123 return;
124
125 if (tp->chip_id == COMET && phy_id == 30) {
126 if (comet_miireg2offset[location])
127 iowrite32(val, ioaddr + comet_miireg2offset[location]);
128 return;
129 }
130
131 spin_lock_irqsave(&tp->mii_lock, flags);
132 if (tp->chip_id == LC82C168) {
133 iowrite32(cmd, ioaddr + 0xA0);
134 for (i = 1000; i >= 0; --i) {
135 barrier();
136 if ( ! (ioread32(ioaddr + 0xA0) & 0x80000000))
137 break;
138 }
139 spin_unlock_irqrestore(&tp->mii_lock, flags);
140 return;
141 }
142
143 /* Establish sync by sending 32 logic ones. */
144 for (i = 32; i >= 0; i--) {
145 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1, mdio_addr);
146 mdio_delay();
147 iowrite32(MDIO_ENB | MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, mdio_addr);
148 mdio_delay();
149 }
150 /* Shift the command bits out. */
151 for (i = 31; i >= 0; i--) {
152 int dataval = (cmd & (1 << i)) ? MDIO_DATA_WRITE1 : 0;
153 iowrite32(MDIO_ENB | dataval, mdio_addr);
154 mdio_delay();
155 iowrite32(MDIO_ENB | dataval | MDIO_SHIFT_CLK, mdio_addr);
156 mdio_delay();
157 }
158 /* Clear out extra bits. */
159 for (i = 2; i > 0; i--) {
160 iowrite32(MDIO_ENB_IN, mdio_addr);
161 mdio_delay();
162 iowrite32(MDIO_ENB_IN | MDIO_SHIFT_CLK, mdio_addr);
163 mdio_delay();
164 }
165
166 spin_unlock_irqrestore(&tp->mii_lock, flags);
167 }
168
169
170 /* Set up the transceiver control registers for the selected media type. */
171 void tulip_select_media(struct net_device *dev, int startup)
172 {
173 struct tulip_private *tp = netdev_priv(dev);
174 void __iomem *ioaddr = tp->base_addr;
175 struct mediatable *mtable = tp->mtable;
176 u32 new_csr6;
177 int i;
178
179 if (mtable) {
180 struct medialeaf *mleaf = &mtable->mleaf[tp->cur_index];
181 unsigned char *p = mleaf->leafdata;
182 switch (mleaf->type) {
183 case 0: /* 21140 non-MII xcvr. */
184 if (tulip_debug > 1)
185 printk(KERN_DEBUG "%s: Using a 21140 non-MII transceiver"
186 " with control setting %2.2x.\n",
187 dev->name, p[1]);
188 dev->if_port = p[0];
189 if (startup)
190 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
191 iowrite32(p[1], ioaddr + CSR12);
192 new_csr6 = 0x02000000 | ((p[2] & 0x71) << 18);
193 break;
194 case 2: case 4: {
195 u16 setup[5];
196 u32 csr13val, csr14val, csr15dir, csr15val;
197 for (i = 0; i < 5; i++)
198 setup[i] = get_u16(&p[i*2 + 1]);
199
200 dev->if_port = p[0] & MEDIA_MASK;
201 if (tulip_media_cap[dev->if_port] & MediaAlwaysFD)
202 tp->full_duplex = 1;
203
204 if (startup && mtable->has_reset) {
205 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
206 unsigned char *rst = rleaf->leafdata;
207 if (tulip_debug > 1)
208 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
209 dev->name);
210 for (i = 0; i < rst[0]; i++)
211 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
212 }
213 if (tulip_debug > 1)
214 printk(KERN_DEBUG "%s: 21143 non-MII %s transceiver control "
215 "%4.4x/%4.4x.\n",
216 dev->name, medianame[dev->if_port], setup[0], setup[1]);
217 if (p[0] & 0x40) { /* SIA (CSR13-15) setup values are provided. */
218 csr13val = setup[0];
219 csr14val = setup[1];
220 csr15dir = (setup[3]<<16) | setup[2];
221 csr15val = (setup[4]<<16) | setup[2];
222 iowrite32(0, ioaddr + CSR13);
223 iowrite32(csr14val, ioaddr + CSR14);
224 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
225 iowrite32(csr15val, ioaddr + CSR15); /* Data */
226 iowrite32(csr13val, ioaddr + CSR13);
227 } else {
228 csr13val = 1;
229 csr14val = 0;
230 csr15dir = (setup[0]<<16) | 0x0008;
231 csr15val = (setup[1]<<16) | 0x0008;
232 if (dev->if_port <= 4)
233 csr14val = t21142_csr14[dev->if_port];
234 if (startup) {
235 iowrite32(0, ioaddr + CSR13);
236 iowrite32(csr14val, ioaddr + CSR14);
237 }
238 iowrite32(csr15dir, ioaddr + CSR15); /* Direction */
239 iowrite32(csr15val, ioaddr + CSR15); /* Data */
240 if (startup) iowrite32(csr13val, ioaddr + CSR13);
241 }
242 if (tulip_debug > 1)
243 printk(KERN_DEBUG "%s: Setting CSR15 to %8.8x/%8.8x.\n",
244 dev->name, csr15dir, csr15val);
245 if (mleaf->type == 4)
246 new_csr6 = 0x82020000 | ((setup[2] & 0x71) << 18);
247 else
248 new_csr6 = 0x82420000;
249 break;
250 }
251 case 1: case 3: {
252 int phy_num = p[0];
253 int init_length = p[1];
254 u16 *misc_info, tmp_info;
255
256 dev->if_port = 11;
257 new_csr6 = 0x020E0000;
258 if (mleaf->type == 3) { /* 21142 */
259 u16 *init_sequence = (u16*)(p+2);
260 u16 *reset_sequence = &((u16*)(p+3))[init_length];
261 int reset_length = p[2 + init_length*2];
262 misc_info = reset_sequence + reset_length;
263 if (startup) {
264 int timeout = 10; /* max 1 ms */
265 for (i = 0; i < reset_length; i++)
266 iowrite32(get_u16(&reset_sequence[i]) << 16, ioaddr + CSR15);
267
268 /* flush posted writes */
269 ioread32(ioaddr + CSR15);
270
271 /* Sect 3.10.3 in DP83840A.pdf (p39) */
272 udelay(500);
273
274 /* Section 4.2 in DP83840A.pdf (p43) */
275 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
276 while (timeout-- &&
277 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
278 udelay(100);
279 }
280 for (i = 0; i < init_length; i++)
281 iowrite32(get_u16(&init_sequence[i]) << 16, ioaddr + CSR15);
282
283 ioread32(ioaddr + CSR15); /* flush posted writes */
284 } else {
285 u8 *init_sequence = p + 2;
286 u8 *reset_sequence = p + 3 + init_length;
287 int reset_length = p[2 + init_length];
288 misc_info = (u16*)(reset_sequence + reset_length);
289 if (startup) {
290 int timeout = 10; /* max 1 ms */
291 iowrite32(mtable->csr12dir | 0x100, ioaddr + CSR12);
292 for (i = 0; i < reset_length; i++)
293 iowrite32(reset_sequence[i], ioaddr + CSR12);
294
295 /* flush posted writes */
296 ioread32(ioaddr + CSR12);
297
298 /* Sect 3.10.3 in DP83840A.pdf (p39) */
299 udelay(500);
300
301 /* Section 4.2 in DP83840A.pdf (p43) */
302 /* and IEEE 802.3 "22.2.4.1.1 Reset" */
303 while (timeout-- &&
304 (tulip_mdio_read (dev, phy_num, MII_BMCR) & BMCR_RESET))
305 udelay(100);
306 }
307 for (i = 0; i < init_length; i++)
308 iowrite32(init_sequence[i], ioaddr + CSR12);
309
310 ioread32(ioaddr + CSR12); /* flush posted writes */
311 }
312
313 tmp_info = get_u16(&misc_info[1]);
314 if (tmp_info)
315 tp->advertising[phy_num] = tmp_info | 1;
316 if (tmp_info && startup < 2) {
317 if (tp->mii_advertise == 0)
318 tp->mii_advertise = tp->advertising[phy_num];
319 if (tulip_debug > 1)
320 printk(KERN_DEBUG "%s: Advertising %4.4x on MII %d.\n",
321 dev->name, tp->mii_advertise, tp->phys[phy_num]);
322 tulip_mdio_write(dev, tp->phys[phy_num], 4, tp->mii_advertise);
323 }
324 break;
325 }
326 case 5: case 6: {
327 u16 setup[5];
328
329 new_csr6 = 0; /* FIXME */
330
331 for (i = 0; i < 5; i++)
332 setup[i] = get_u16(&p[i*2 + 1]);
333
334 if (startup && mtable->has_reset) {
335 struct medialeaf *rleaf = &mtable->mleaf[mtable->has_reset];
336 unsigned char *rst = rleaf->leafdata;
337 if (tulip_debug > 1)
338 printk(KERN_DEBUG "%s: Resetting the transceiver.\n",
339 dev->name);
340 for (i = 0; i < rst[0]; i++)
341 iowrite32(get_u16(rst + 1 + (i<<1)) << 16, ioaddr + CSR15);
342 }
343
344 break;
345 }
346 default:
347 printk(KERN_DEBUG "%s: Invalid media table selection %d.\n",
348 dev->name, mleaf->type);
349 new_csr6 = 0x020E0000;
350 }
351 if (tulip_debug > 1)
352 printk(KERN_DEBUG "%s: Using media type %s, CSR12 is %2.2x.\n",
353 dev->name, medianame[dev->if_port],
354 ioread32(ioaddr + CSR12) & 0xff);
355 } else if (tp->chip_id == LC82C168) {
356 if (startup && ! tp->medialock)
357 dev->if_port = tp->mii_cnt ? 11 : 0;
358 if (tulip_debug > 1)
359 printk(KERN_DEBUG "%s: PNIC PHY status is %3.3x, media %s.\n",
360 dev->name, ioread32(ioaddr + 0xB8), medianame[dev->if_port]);
361 if (tp->mii_cnt) {
362 new_csr6 = 0x810C0000;
363 iowrite32(0x0001, ioaddr + CSR15);
364 iowrite32(0x0201B07A, ioaddr + 0xB8);
365 } else if (startup) {
366 /* Start with 10mbps to do autonegotiation. */
367 iowrite32(0x32, ioaddr + CSR12);
368 new_csr6 = 0x00420000;
369 iowrite32(0x0001B078, ioaddr + 0xB8);
370 iowrite32(0x0201B078, ioaddr + 0xB8);
371 } else if (dev->if_port == 3 || dev->if_port == 5) {
372 iowrite32(0x33, ioaddr + CSR12);
373 new_csr6 = 0x01860000;
374 /* Trigger autonegotiation. */
375 iowrite32(startup ? 0x0201F868 : 0x0001F868, ioaddr + 0xB8);
376 } else {
377 iowrite32(0x32, ioaddr + CSR12);
378 new_csr6 = 0x00420000;
379 iowrite32(0x1F078, ioaddr + 0xB8);
380 }
381 } else { /* Unknown chip type with no media table. */
382 if (tp->default_port == 0)
383 dev->if_port = tp->mii_cnt ? 11 : 3;
384 if (tulip_media_cap[dev->if_port] & MediaIsMII) {
385 new_csr6 = 0x020E0000;
386 } else if (tulip_media_cap[dev->if_port] & MediaIsFx) {
387 new_csr6 = 0x02860000;
388 } else
389 new_csr6 = 0x03860000;
390 if (tulip_debug > 1)
391 printk(KERN_DEBUG "%s: No media description table, assuming "
392 "%s transceiver, CSR12 %2.2x.\n",
393 dev->name, medianame[dev->if_port],
394 ioread32(ioaddr + CSR12));
395 }
396
397 tp->csr6 = new_csr6 | (tp->csr6 & 0xfdff) | (tp->full_duplex ? 0x0200 : 0);
398
399 mdelay(1);
400
401 return;
402 }
403
404 /*
405 Check the MII negotiated duplex and change the CSR6 setting if
406 required.
407 Return 0 if everything is OK.
408 Return < 0 if the transceiver is missing or has no link beat.
409 */
410 int tulip_check_duplex(struct net_device *dev)
411 {
412 struct tulip_private *tp = netdev_priv(dev);
413 unsigned int bmsr, lpa, negotiated, new_csr6;
414
415 bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
416 lpa = tulip_mdio_read(dev, tp->phys[0], MII_LPA);
417 if (tulip_debug > 1)
418 printk(KERN_INFO "%s: MII status %4.4x, Link partner report "
419 "%4.4x.\n", dev->name, bmsr, lpa);
420 if (bmsr == 0xffff)
421 return -2;
422 if ((bmsr & BMSR_LSTATUS) == 0) {
423 int new_bmsr = tulip_mdio_read(dev, tp->phys[0], MII_BMSR);
424 if ((new_bmsr & BMSR_LSTATUS) == 0) {
425 if (tulip_debug > 1)
426 printk(KERN_INFO "%s: No link beat on the MII interface,"
427 " status %4.4x.\n", dev->name, new_bmsr);
428 return -1;
429 }
430 }
431 negotiated = lpa & tp->advertising[0];
432 tp->full_duplex = mii_duplex(tp->full_duplex_lock, negotiated);
433
434 new_csr6 = tp->csr6;
435
436 if (negotiated & LPA_100) new_csr6 &= ~TxThreshold;
437 else new_csr6 |= TxThreshold;
438 if (tp->full_duplex) new_csr6 |= FullDuplex;
439 else new_csr6 &= ~FullDuplex;
440
441 if (new_csr6 != tp->csr6) {
442 tp->csr6 = new_csr6;
443 tulip_restart_rxtx(tp);
444
445 if (tulip_debug > 0)
446 printk(KERN_INFO "%s: Setting %s-duplex based on MII"
447 "#%d link partner capability of %4.4x.\n",
448 dev->name, tp->full_duplex ? "full" : "half",
449 tp->phys[0], lpa);
450 return 1;
451 }
452
453 return 0;
454 }
455
456 void __devinit tulip_find_mii (struct net_device *dev, int board_idx)
457 {
458 struct tulip_private *tp = netdev_priv(dev);
459 int phyn, phy_idx = 0;
460 int mii_reg0;
461 int mii_advert;
462 unsigned int to_advert, new_bmcr, ane_switch;
463
464 /* Find the connected MII xcvrs.
465 Doing this in open() would allow detecting external xcvrs later,
466 but takes much time. */
467 for (phyn = 1; phyn <= 32 && phy_idx < sizeof (tp->phys); phyn++) {
468 int phy = phyn & 0x1f;
469 int mii_status = tulip_mdio_read (dev, phy, MII_BMSR);
470 if ((mii_status & 0x8301) == 0x8001 ||
471 ((mii_status & BMSR_100BASE4) == 0 &&
472 (mii_status & 0x7800) != 0)) {
473 /* preserve Becker logic, gain indentation level */
474 } else {
475 continue;
476 }
477
478 mii_reg0 = tulip_mdio_read (dev, phy, MII_BMCR);
479 mii_advert = tulip_mdio_read (dev, phy, MII_ADVERTISE);
480 ane_switch = 0;
481
482 /* if not advertising at all, gen an
483 * advertising value from the capability
484 * bits in BMSR
485 */
486 if ((mii_advert & ADVERTISE_ALL) == 0) {
487 unsigned int tmpadv = tulip_mdio_read (dev, phy, MII_BMSR);
488 mii_advert = ((tmpadv >> 6) & 0x3e0) | 1;
489 }
490
491 if (tp->mii_advertise) {
492 tp->advertising[phy_idx] =
493 to_advert = tp->mii_advertise;
494 } else if (tp->advertising[phy_idx]) {
495 to_advert = tp->advertising[phy_idx];
496 } else {
497 tp->advertising[phy_idx] =
498 tp->mii_advertise =
499 to_advert = mii_advert;
500 }
501
502 tp->phys[phy_idx++] = phy;
503
504 printk (KERN_INFO "tulip%d: MII transceiver #%d "
505 "config %4.4x status %4.4x advertising %4.4x.\n",
506 board_idx, phy, mii_reg0, mii_status, mii_advert);
507
508 /* Fixup for DLink with miswired PHY. */
509 if (mii_advert != to_advert) {
510 printk (KERN_DEBUG "tulip%d: Advertising %4.4x on PHY %d,"
511 " previously advertising %4.4x.\n",
512 board_idx, to_advert, phy, mii_advert);
513 tulip_mdio_write (dev, phy, 4, to_advert);
514 }
515
516 /* Enable autonegotiation: some boards default to off. */
517 if (tp->default_port == 0) {
518 new_bmcr = mii_reg0 | BMCR_ANENABLE;
519 if (new_bmcr != mii_reg0) {
520 new_bmcr |= BMCR_ANRESTART;
521 ane_switch = 1;
522 }
523 }
524 /* ...or disable nway, if forcing media */
525 else {
526 new_bmcr = mii_reg0 & ~BMCR_ANENABLE;
527 if (new_bmcr != mii_reg0)
528 ane_switch = 1;
529 }
530
531 /* clear out bits we never want at this point */
532 new_bmcr &= ~(BMCR_CTST | BMCR_FULLDPLX | BMCR_ISOLATE |
533 BMCR_PDOWN | BMCR_SPEED100 | BMCR_LOOPBACK |
534 BMCR_RESET);
535
536 if (tp->full_duplex)
537 new_bmcr |= BMCR_FULLDPLX;
538 if (tulip_media_cap[tp->default_port] & MediaIs100)
539 new_bmcr |= BMCR_SPEED100;
540
541 if (new_bmcr != mii_reg0) {
542 /* some phys need the ANE switch to
543 * happen before forced media settings
544 * will "take." However, we write the
545 * same value twice in order not to
546 * confuse the sane phys.
547 */
548 if (ane_switch) {
549 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
550 udelay (10);
551 }
552 tulip_mdio_write (dev, phy, MII_BMCR, new_bmcr);
553 }
554 }
555 tp->mii_cnt = phy_idx;
556 if (tp->mtable && tp->mtable->has_mii && phy_idx == 0) {
557 printk (KERN_INFO "tulip%d: ***WARNING***: No MII transceiver found!\n",
558 board_idx);
559 tp->phys[0] = 1;
560 }
561 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree