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1da177e4 LT |
1 | /* |
2 | drivers/net/tulip/eeprom.c | |
3 | ||
1da177e4 LT |
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} | |
78a65518 GG |
11 | for more information on this driver. |
12 | Please submit bug reports to http://bugzilla.kernel.org/. | |
1da177e4 LT |
13 | */ |
14 | ||
15 | #include <linux/pci.h> | |
16 | #include "tulip.h" | |
17 | #include <linux/init.h> | |
18 | #include <asm/unaligned.h> | |
19 | ||
20 | ||
21 | ||
22 | /* Serial EEPROM section. */ | |
23 | /* The main routine to parse the very complicated SROM structure. | |
24 | Search www.digital.com for "21X4 SROM" to get details. | |
25 | This code is very complex, and will require changes to support | |
26 | additional cards, so I'll be verbose about what is going on. | |
27 | */ | |
28 | ||
29 | /* Known cards that have old-style EEPROMs. */ | |
30 | static struct eeprom_fixup eeprom_fixups[] __devinitdata = { | |
31 | {"Asante", 0, 0, 0x94, {0x1e00, 0x0000, 0x0800, 0x0100, 0x018c, | |
32 | 0x0000, 0x0000, 0xe078, 0x0001, 0x0050, 0x0018 }}, | |
33 | {"SMC9332DST", 0, 0, 0xC0, { 0x1e00, 0x0000, 0x0800, 0x041f, | |
34 | 0x0000, 0x009E, /* 10baseT */ | |
35 | 0x0004, 0x009E, /* 10baseT-FD */ | |
36 | 0x0903, 0x006D, /* 100baseTx */ | |
37 | 0x0905, 0x006D, /* 100baseTx-FD */ }}, | |
38 | {"Cogent EM100", 0, 0, 0x92, { 0x1e00, 0x0000, 0x0800, 0x063f, | |
39 | 0x0107, 0x8021, /* 100baseFx */ | |
40 | 0x0108, 0x8021, /* 100baseFx-FD */ | |
41 | 0x0100, 0x009E, /* 10baseT */ | |
42 | 0x0104, 0x009E, /* 10baseT-FD */ | |
43 | 0x0103, 0x006D, /* 100baseTx */ | |
44 | 0x0105, 0x006D, /* 100baseTx-FD */ }}, | |
45 | {"Maxtech NX-110", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x0513, | |
46 | 0x1001, 0x009E, /* 10base2, CSR12 0x10*/ | |
47 | 0x0000, 0x009E, /* 10baseT */ | |
48 | 0x0004, 0x009E, /* 10baseT-FD */ | |
49 | 0x0303, 0x006D, /* 100baseTx, CSR12 0x03 */ | |
50 | 0x0305, 0x006D, /* 100baseTx-FD CSR12 0x03 */}}, | |
51 | {"Accton EN1207", 0, 0, 0xE8, { 0x1e00, 0x0000, 0x0800, 0x051F, | |
52 | 0x1B01, 0x0000, /* 10base2, CSR12 0x1B */ | |
53 | 0x0B00, 0x009E, /* 10baseT, CSR12 0x0B */ | |
54 | 0x0B04, 0x009E, /* 10baseT-FD,CSR12 0x0B */ | |
55 | 0x1B03, 0x006D, /* 100baseTx, CSR12 0x1B */ | |
56 | 0x1B05, 0x006D, /* 100baseTx-FD CSR12 0x1B */ | |
57 | }}, | |
58 | {"NetWinder", 0x00, 0x10, 0x57, | |
59 | /* Default media = MII | |
60 | * MII block, reset sequence (3) = 0x0821 0x0000 0x0001, capabilities 0x01e1 | |
61 | */ | |
62 | { 0x1e00, 0x0000, 0x000b, 0x8f01, 0x0103, 0x0300, 0x0821, 0x000, 0x0001, 0x0000, 0x01e1 } | |
63 | }, | |
12755c16 RB |
64 | {"Cobalt Microserver", 0, 0x10, 0xE0, {0x1e00, /* 0 == controller #, 1e == offset */ |
65 | 0x0000, /* 0 == high offset, 0 == gap */ | |
66 | 0x0800, /* Default Autoselect */ | |
67 | 0x8001, /* 1 leaf, extended type, bogus len */ | |
68 | 0x0003, /* Type 3 (MII), PHY #0 */ | |
69 | 0x0400, /* 0 init instr, 4 reset instr */ | |
70 | 0x0801, /* Set control mode, GP0 output */ | |
71 | 0x0000, /* Drive GP0 Low (RST is active low) */ | |
72 | 0x0800, /* control mode, GP0 input (undriven) */ | |
73 | 0x0000, /* clear control mode */ | |
74 | 0x7800, /* 100TX FDX + HDX, 10bT FDX + HDX */ | |
75 | 0x01e0, /* Advertise all above */ | |
76 | 0x5000, /* FDX all above */ | |
77 | 0x1800, /* Set fast TTM in 100bt modes */ | |
78 | 0x0000, /* PHY cannot be unplugged */ | |
79 | }}, | |
1da177e4 LT |
80 | {NULL}}; |
81 | ||
82 | ||
83 | static const char *block_name[] __devinitdata = { | |
84 | "21140 non-MII", | |
85 | "21140 MII PHY", | |
86 | "21142 Serial PHY", | |
87 | "21142 MII PHY", | |
88 | "21143 SYM PHY", | |
89 | "21143 reset method" | |
90 | }; | |
91 | ||
92 | ||
93 | /** | |
94 | * tulip_build_fake_mediatable - Build a fake mediatable entry. | |
95 | * @tp: Ptr to the tulip private data. | |
96 | * | |
f3b197ac | 97 | * Some cards like the 3x5 HSC cards (J3514A) do not have a standard |
1da177e4 | 98 | * srom and can not be handled under the fixup routine. These cards |
f3b197ac | 99 | * still need a valid mediatable entry for correct csr12 setup and |
1da177e4 | 100 | * mii handling. |
f3b197ac | 101 | * |
1da177e4 LT |
102 | * Since this is currently a parisc-linux specific function, the |
103 | * #ifdef __hppa__ should completely optimize this function away for | |
104 | * non-parisc hardware. | |
105 | */ | |
106 | static void __devinit tulip_build_fake_mediatable(struct tulip_private *tp) | |
107 | { | |
108 | #ifdef CONFIG_GSC | |
109 | if (tp->flags & NEEDS_FAKE_MEDIA_TABLE) { | |
110 | static unsigned char leafdata[] = | |
111 | { 0x01, /* phy number */ | |
112 | 0x02, /* gpr setup sequence length */ | |
113 | 0x02, 0x00, /* gpr setup sequence */ | |
114 | 0x02, /* phy reset sequence length */ | |
115 | 0x01, 0x00, /* phy reset sequence */ | |
116 | 0x00, 0x78, /* media capabilities */ | |
117 | 0x00, 0xe0, /* nway advertisment */ | |
118 | 0x00, 0x05, /* fdx bit map */ | |
119 | 0x00, 0x06 /* ttm bit map */ | |
120 | }; | |
121 | ||
122 | tp->mtable = (struct mediatable *) | |
123 | kmalloc(sizeof(struct mediatable) + sizeof(struct medialeaf), GFP_KERNEL); | |
124 | ||
125 | if (tp->mtable == NULL) | |
126 | return; /* Horrible, impossible failure. */ | |
127 | ||
128 | tp->mtable->defaultmedia = 0x800; | |
129 | tp->mtable->leafcount = 1; | |
130 | tp->mtable->csr12dir = 0x3f; /* inputs on bit7 for hsc-pci, bit6 for pci-fx */ | |
131 | tp->mtable->has_nonmii = 0; | |
132 | tp->mtable->has_reset = 0; | |
133 | tp->mtable->has_mii = 1; | |
134 | tp->mtable->csr15dir = tp->mtable->csr15val = 0; | |
135 | tp->mtable->mleaf[0].type = 1; | |
136 | tp->mtable->mleaf[0].media = 11; | |
137 | tp->mtable->mleaf[0].leafdata = &leafdata[0]; | |
138 | tp->flags |= HAS_PHY_IRQ; | |
139 | tp->csr12_shadow = -1; | |
140 | } | |
f3b197ac | 141 | #endif |
1da177e4 LT |
142 | } |
143 | ||
144 | void __devinit tulip_parse_eeprom(struct net_device *dev) | |
145 | { | |
c251c7f7 JP |
146 | /* |
147 | dev is not registered at this point, so logging messages can't | |
148 | use dev_<level> or netdev_<level> but dev->name is good via a | |
149 | hack in the caller | |
150 | */ | |
151 | ||
1da177e4 LT |
152 | /* The last media info list parsed, for multiport boards. */ |
153 | static struct mediatable *last_mediatable; | |
154 | static unsigned char *last_ee_data; | |
155 | static int controller_index; | |
156 | struct tulip_private *tp = netdev_priv(dev); | |
157 | unsigned char *ee_data = tp->eeprom; | |
158 | int i; | |
159 | ||
160 | tp->mtable = NULL; | |
161 | /* Detect an old-style (SA only) EEPROM layout: | |
162 | memcmp(eedata, eedata+16, 8). */ | |
163 | for (i = 0; i < 8; i ++) | |
164 | if (ee_data[i] != ee_data[16+i]) | |
165 | break; | |
166 | if (i >= 8) { | |
167 | if (ee_data[0] == 0xff) { | |
168 | if (last_mediatable) { | |
169 | controller_index++; | |
c251c7f7 JP |
170 | pr_info("%s: Controller %d of multiport board\n", |
171 | dev->name, controller_index); | |
1da177e4 LT |
172 | tp->mtable = last_mediatable; |
173 | ee_data = last_ee_data; | |
174 | goto subsequent_board; | |
175 | } else | |
c251c7f7 JP |
176 | pr_info("%s: Missing EEPROM, this interface may not work correctly!\n", |
177 | dev->name); | |
1da177e4 LT |
178 | return; |
179 | } | |
180 | /* Do a fix-up based on the vendor half of the station address prefix. */ | |
181 | for (i = 0; eeprom_fixups[i].name; i++) { | |
8e95a202 JP |
182 | if (dev->dev_addr[0] == eeprom_fixups[i].addr0 && |
183 | dev->dev_addr[1] == eeprom_fixups[i].addr1 && | |
184 | dev->dev_addr[2] == eeprom_fixups[i].addr2) { | |
185 | if (dev->dev_addr[2] == 0xE8 && ee_data[0x1a] == 0x55) | |
1da177e4 LT |
186 | i++; /* An Accton EN1207, not an outlaw Maxtech. */ |
187 | memcpy(ee_data + 26, eeprom_fixups[i].newtable, | |
188 | sizeof(eeprom_fixups[i].newtable)); | |
c251c7f7 JP |
189 | pr_info("%s: Old format EEPROM on '%s' board. Using substitute media control info\n", |
190 | dev->name, eeprom_fixups[i].name); | |
1da177e4 LT |
191 | break; |
192 | } | |
193 | } | |
194 | if (eeprom_fixups[i].name == NULL) { /* No fixup found. */ | |
c251c7f7 JP |
195 | pr_info("%s: Old style EEPROM with no media selection information\n", |
196 | dev->name); | |
1da177e4 LT |
197 | return; |
198 | } | |
199 | } | |
200 | ||
201 | controller_index = 0; | |
202 | if (ee_data[19] > 1) { /* Multiport board. */ | |
203 | last_ee_data = ee_data; | |
204 | } | |
205 | subsequent_board: | |
206 | ||
207 | if (ee_data[27] == 0) { /* No valid media table. */ | |
208 | tulip_build_fake_mediatable(tp); | |
209 | } else { | |
210 | unsigned char *p = (void *)ee_data + ee_data[27]; | |
211 | unsigned char csr12dir = 0; | |
212 | int count, new_advertise = 0; | |
213 | struct mediatable *mtable; | |
214 | u16 media = get_u16(p); | |
215 | ||
216 | p += 2; | |
217 | if (tp->flags & CSR12_IN_SROM) | |
218 | csr12dir = *p++; | |
219 | count = *p++; | |
220 | ||
221 | /* there is no phy information, don't even try to build mtable */ | |
222 | if (count == 0) { | |
223 | if (tulip_debug > 0) | |
c251c7f7 JP |
224 | pr_warning("%s: no phy info, aborting mtable build\n", |
225 | dev->name); | |
1da177e4 LT |
226 | return; |
227 | } | |
228 | ||
229 | mtable = (struct mediatable *) | |
230 | kmalloc(sizeof(struct mediatable) + count*sizeof(struct medialeaf), | |
231 | GFP_KERNEL); | |
232 | if (mtable == NULL) | |
233 | return; /* Horrible, impossible failure. */ | |
234 | last_mediatable = tp->mtable = mtable; | |
235 | mtable->defaultmedia = media; | |
236 | mtable->leafcount = count; | |
237 | mtable->csr12dir = csr12dir; | |
238 | mtable->has_nonmii = mtable->has_mii = mtable->has_reset = 0; | |
239 | mtable->csr15dir = mtable->csr15val = 0; | |
240 | ||
c251c7f7 JP |
241 | pr_info("%s: EEPROM default media type %s\n", |
242 | dev->name, | |
243 | media & 0x0800 ? "Autosense" | |
244 | : medianame[media & MEDIA_MASK]); | |
1da177e4 LT |
245 | for (i = 0; i < count; i++) { |
246 | struct medialeaf *leaf = &mtable->mleaf[i]; | |
247 | ||
248 | if ((p[0] & 0x80) == 0) { /* 21140 Compact block. */ | |
249 | leaf->type = 0; | |
250 | leaf->media = p[0] & 0x3f; | |
251 | leaf->leafdata = p; | |
252 | if ((p[2] & 0x61) == 0x01) /* Bogus, but Znyx boards do it. */ | |
253 | mtable->has_mii = 1; | |
254 | p += 4; | |
255 | } else { | |
256 | leaf->type = p[1]; | |
257 | if (p[1] == 0x05) { | |
258 | mtable->has_reset = i; | |
259 | leaf->media = p[2] & 0x0f; | |
260 | } else if (tp->chip_id == DM910X && p[1] == 0x80) { | |
261 | /* Hack to ignore Davicom delay period block */ | |
262 | mtable->leafcount--; | |
263 | count--; | |
264 | i--; | |
265 | leaf->leafdata = p + 2; | |
266 | p += (p[0] & 0x3f) + 1; | |
267 | continue; | |
268 | } else if (p[1] & 1) { | |
269 | int gpr_len, reset_len; | |
270 | ||
271 | mtable->has_mii = 1; | |
272 | leaf->media = 11; | |
273 | gpr_len=p[3]*2; | |
274 | reset_len=p[4+gpr_len]*2; | |
275 | new_advertise |= get_u16(&p[7+gpr_len+reset_len]); | |
276 | } else { | |
277 | mtable->has_nonmii = 1; | |
278 | leaf->media = p[2] & MEDIA_MASK; | |
279 | /* Davicom's media number for 100BaseTX is strange */ | |
280 | if (tp->chip_id == DM910X && leaf->media == 1) | |
281 | leaf->media = 3; | |
282 | switch (leaf->media) { | |
283 | case 0: new_advertise |= 0x0020; break; | |
284 | case 4: new_advertise |= 0x0040; break; | |
285 | case 3: new_advertise |= 0x0080; break; | |
286 | case 5: new_advertise |= 0x0100; break; | |
287 | case 6: new_advertise |= 0x0200; break; | |
288 | } | |
289 | if (p[1] == 2 && leaf->media == 0) { | |
290 | if (p[2] & 0x40) { | |
291 | u32 base15 = get_unaligned((u16*)&p[7]); | |
292 | mtable->csr15dir = | |
293 | (get_unaligned((u16*)&p[9])<<16) + base15; | |
294 | mtable->csr15val = | |
295 | (get_unaligned((u16*)&p[11])<<16) + base15; | |
296 | } else { | |
297 | mtable->csr15dir = get_unaligned((u16*)&p[3])<<16; | |
298 | mtable->csr15val = get_unaligned((u16*)&p[5])<<16; | |
299 | } | |
300 | } | |
301 | } | |
302 | leaf->leafdata = p + 2; | |
303 | p += (p[0] & 0x3f) + 1; | |
304 | } | |
305 | if (tulip_debug > 1 && leaf->media == 11) { | |
306 | unsigned char *bp = leaf->leafdata; | |
c251c7f7 JP |
307 | pr_info("%s: MII interface PHY %d, setup/reset sequences %d/%d long, capabilities %02x %02x\n", |
308 | dev->name, | |
309 | bp[0], bp[1], bp[2 + bp[1]*2], | |
310 | bp[5 + bp[2 + bp[1]*2]*2], | |
311 | bp[4 + bp[2 + bp[1]*2]*2]); | |
1da177e4 | 312 | } |
c251c7f7 JP |
313 | pr_info("%s: Index #%d - Media %s (#%d) described by a %s (%d) block\n", |
314 | dev->name, | |
315 | i, medianame[leaf->media & 15], leaf->media, | |
316 | leaf->type < ARRAY_SIZE(block_name) ? block_name[leaf->type] : "<unknown>", | |
317 | leaf->type); | |
1da177e4 LT |
318 | } |
319 | if (new_advertise) | |
320 | tp->sym_advertise = new_advertise; | |
321 | } | |
322 | } | |
323 | /* Reading a serial EEPROM is a "bit" grungy, but we work our way through:->.*/ | |
324 | ||
325 | /* EEPROM_Ctrl bits. */ | |
326 | #define EE_SHIFT_CLK 0x02 /* EEPROM shift clock. */ | |
327 | #define EE_CS 0x01 /* EEPROM chip select. */ | |
328 | #define EE_DATA_WRITE 0x04 /* Data from the Tulip to EEPROM. */ | |
329 | #define EE_WRITE_0 0x01 | |
330 | #define EE_WRITE_1 0x05 | |
331 | #define EE_DATA_READ 0x08 /* Data from the EEPROM chip. */ | |
332 | #define EE_ENB (0x4800 | EE_CS) | |
333 | ||
334 | /* Delay between EEPROM clock transitions. | |
335 | Even at 33Mhz current PCI implementations don't overrun the EEPROM clock. | |
336 | We add a bus turn-around to insure that this remains true. */ | |
337 | #define eeprom_delay() ioread32(ee_addr) | |
338 | ||
339 | /* The EEPROM commands include the alway-set leading bit. */ | |
340 | #define EE_READ_CMD (6) | |
341 | ||
342 | /* Note: this routine returns extra data bits for size detection. */ | |
343 | int __devinit tulip_read_eeprom(struct net_device *dev, int location, int addr_len) | |
344 | { | |
345 | int i; | |
346 | unsigned retval = 0; | |
8f15ea42 | 347 | struct tulip_private *tp = netdev_priv(dev); |
1da177e4 LT |
348 | void __iomem *ee_addr = tp->base_addr + CSR9; |
349 | int read_cmd = location | (EE_READ_CMD << addr_len); | |
350 | ||
209261c0 GG |
351 | /* If location is past the end of what we can address, don't |
352 | * read some other location (ie truncate). Just return zero. | |
353 | */ | |
354 | if (location > (1 << addr_len) - 1) | |
355 | return 0; | |
356 | ||
1da177e4 LT |
357 | iowrite32(EE_ENB & ~EE_CS, ee_addr); |
358 | iowrite32(EE_ENB, ee_addr); | |
359 | ||
360 | /* Shift the read command bits out. */ | |
361 | for (i = 4 + addr_len; i >= 0; i--) { | |
362 | short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; | |
363 | iowrite32(EE_ENB | dataval, ee_addr); | |
364 | eeprom_delay(); | |
365 | iowrite32(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); | |
366 | eeprom_delay(); | |
367 | retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0); | |
368 | } | |
369 | iowrite32(EE_ENB, ee_addr); | |
370 | eeprom_delay(); | |
371 | ||
372 | for (i = 16; i > 0; i--) { | |
373 | iowrite32(EE_ENB | EE_SHIFT_CLK, ee_addr); | |
374 | eeprom_delay(); | |
375 | retval = (retval << 1) | ((ioread32(ee_addr) & EE_DATA_READ) ? 1 : 0); | |
376 | iowrite32(EE_ENB, ee_addr); | |
377 | eeprom_delay(); | |
378 | } | |
379 | ||
380 | /* Terminate the EEPROM access. */ | |
381 | iowrite32(EE_ENB & ~EE_CS, ee_addr); | |
382 | return (tp->flags & HAS_SWAPPED_SEEPROM) ? swab16(retval) : retval; | |
383 | } | |
384 |