1 /***********************license start***************
2  * Author: Cavium Networks
3  *
4  * Contact: support@caviumnetworks.com
5  * This file is part of the OCTEON SDK
6  *
7  * Copyright (c) 2003-2017 Cavium, Inc.
8  *
9  * This file is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License, Version 2, as
11  * published by the Free Software Foundation.
12  *
13  * This file is distributed in the hope that it will be useful, but
14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16  * NONINFRINGEMENT.  See the GNU General Public License for more
17  * details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this file; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22  * or visit http://www.gnu.org/licenses/.
23  *
24  * This file may also be available under a different license from Cavium.
25  * Contact Cavium Networks for more information
26  ***********************license end**************************************/
27 
28 #include <asm/octeon/octeon.h>
29 
30 enum octeon_feature_bits __octeon_feature_bits __read_mostly;
31 EXPORT_SYMBOL_GPL(__octeon_feature_bits);
32 
33 /**
34  * Read a byte of fuse data
35  * @byte_addr:	 address to read
36  *
37  * Returns fuse value: 0 or 1
38  */
cvmx_fuse_read_byte(int byte_addr)39 static uint8_t __init cvmx_fuse_read_byte(int byte_addr)
40 {
41 	union cvmx_mio_fus_rcmd read_cmd;
42 
43 	read_cmd.u64 = 0;
44 	read_cmd.s.addr = byte_addr;
45 	read_cmd.s.pend = 1;
46 	cvmx_write_csr(CVMX_MIO_FUS_RCMD, read_cmd.u64);
47 	while ((read_cmd.u64 = cvmx_read_csr(CVMX_MIO_FUS_RCMD))
48 	       && read_cmd.s.pend)
49 		;
50 	return read_cmd.s.dat;
51 }
52 
53 /*
54  * Version of octeon_model_get_string() that takes buffer as argument,
55  * as running early in u-boot static/global variables don't work when
56  * running from flash.
57  */
octeon_model_get_string_buffer(uint32_t chip_id,char * buffer)58 static const char *__init octeon_model_get_string_buffer(uint32_t chip_id,
59 							 char *buffer)
60 {
61 	const char *family;
62 	const char *core_model;
63 	char pass[4];
64 	int clock_mhz;
65 	const char *suffix;
66 	int num_cores;
67 	union cvmx_mio_fus_dat2 fus_dat2;
68 	union cvmx_mio_fus_dat3 fus_dat3;
69 	char fuse_model[10];
70 	uint32_t fuse_data = 0;
71 	uint64_t l2d_fus3 = 0;
72 
73 	if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
74 		l2d_fus3 = (cvmx_read_csr(CVMX_L2D_FUS3) >> 34) & 0x3;
75 	fus_dat2.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT2);
76 	fus_dat3.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT3);
77 	num_cores = cvmx_octeon_num_cores();
78 
79 	/* Make sure the non existent devices look disabled */
80 	switch ((chip_id >> 8) & 0xff) {
81 	case 6:		/* CN50XX */
82 	case 2:		/* CN30XX */
83 		fus_dat3.s.nodfa_dte = 1;
84 		fus_dat3.s.nozip = 1;
85 		break;
86 	case 4:		/* CN57XX or CN56XX */
87 		fus_dat3.s.nodfa_dte = 1;
88 		break;
89 	default:
90 		break;
91 	}
92 
93 	/* Make a guess at the suffix */
94 	/* NSP = everything */
95 	/* EXP = No crypto */
96 	/* SCP = No DFA, No zip */
97 	/* CP = No DFA, No crypto, No zip */
98 	if (fus_dat3.s.nodfa_dte) {
99 		if (fus_dat2.s.nocrypto)
100 			suffix = "CP";
101 		else
102 			suffix = "SCP";
103 	} else if (fus_dat2.s.nocrypto)
104 		suffix = "EXP";
105 	else
106 		suffix = "NSP";
107 
108 	if (!fus_dat2.s.nocrypto)
109 		__octeon_feature_bits |= OCTEON_HAS_CRYPTO;
110 
111 	/*
112 	 * Assume pass number is encoded using <5:3><2:0>. Exceptions
113 	 * will be fixed later.
114 	 */
115 	sprintf(pass, "%d.%d", (int)((chip_id >> 3) & 7) + 1, (int)chip_id & 7);
116 
117 	/*
118 	 * Use the number of cores to determine the last 2 digits of
119 	 * the model number. There are some exceptions that are fixed
120 	 * later.
121 	 */
122 	switch (num_cores) {
123 	case 48:
124 		core_model = "90";
125 		break;
126 	case 44:
127 		core_model = "88";
128 		break;
129 	case 40:
130 		core_model = "85";
131 		break;
132 	case 32:
133 		core_model = "80";
134 		break;
135 	case 24:
136 		core_model = "70";
137 		break;
138 	case 16:
139 		core_model = "60";
140 		break;
141 	case 15:
142 		core_model = "58";
143 		break;
144 	case 14:
145 		core_model = "55";
146 		break;
147 	case 13:
148 		core_model = "52";
149 		break;
150 	case 12:
151 		core_model = "50";
152 		break;
153 	case 11:
154 		core_model = "48";
155 		break;
156 	case 10:
157 		core_model = "45";
158 		break;
159 	case 9:
160 		core_model = "42";
161 		break;
162 	case 8:
163 		core_model = "40";
164 		break;
165 	case 7:
166 		core_model = "38";
167 		break;
168 	case 6:
169 		core_model = "34";
170 		break;
171 	case 5:
172 		core_model = "32";
173 		break;
174 	case 4:
175 		core_model = "30";
176 		break;
177 	case 3:
178 		core_model = "25";
179 		break;
180 	case 2:
181 		core_model = "20";
182 		break;
183 	case 1:
184 		core_model = "10";
185 		break;
186 	default:
187 		core_model = "XX";
188 		break;
189 	}
190 
191 	/* Now figure out the family, the first two digits */
192 	switch ((chip_id >> 8) & 0xff) {
193 	case 0:		/* CN38XX, CN37XX or CN36XX */
194 		if (l2d_fus3) {
195 			/*
196 			 * For some unknown reason, the 16 core one is
197 			 * called 37 instead of 36.
198 			 */
199 			if (num_cores >= 16)
200 				family = "37";
201 			else
202 				family = "36";
203 		} else
204 			family = "38";
205 		/*
206 		 * This series of chips didn't follow the standard
207 		 * pass numbering.
208 		 */
209 		switch (chip_id & 0xf) {
210 		case 0:
211 			strcpy(pass, "1.X");
212 			break;
213 		case 1:
214 			strcpy(pass, "2.X");
215 			break;
216 		case 3:
217 			strcpy(pass, "3.X");
218 			break;
219 		default:
220 			strcpy(pass, "X.X");
221 			break;
222 		}
223 		break;
224 	case 1:		/* CN31XX or CN3020 */
225 		if ((chip_id & 0x10) || l2d_fus3)
226 			family = "30";
227 		else
228 			family = "31";
229 		/*
230 		 * This series of chips didn't follow the standard
231 		 * pass numbering.
232 		 */
233 		switch (chip_id & 0xf) {
234 		case 0:
235 			strcpy(pass, "1.0");
236 			break;
237 		case 2:
238 			strcpy(pass, "1.1");
239 			break;
240 		default:
241 			strcpy(pass, "X.X");
242 			break;
243 		}
244 		break;
245 	case 2:		/* CN3010 or CN3005 */
246 		family = "30";
247 		/* A chip with half cache is an 05 */
248 		if (l2d_fus3)
249 			core_model = "05";
250 		/*
251 		 * This series of chips didn't follow the standard
252 		 * pass numbering.
253 		 */
254 		switch (chip_id & 0xf) {
255 		case 0:
256 			strcpy(pass, "1.0");
257 			break;
258 		case 2:
259 			strcpy(pass, "1.1");
260 			break;
261 		default:
262 			strcpy(pass, "X.X");
263 			break;
264 		}
265 		break;
266 	case 3:		/* CN58XX */
267 		family = "58";
268 		/* Special case. 4 core, half cache (CP with half cache) */
269 		if ((num_cores == 4) && l2d_fus3 && !strncmp(suffix, "CP", 2))
270 			core_model = "29";
271 
272 		/* Pass 1 uses different encodings for pass numbers */
273 		if ((chip_id & 0xFF) < 0x8) {
274 			switch (chip_id & 0x3) {
275 			case 0:
276 				strcpy(pass, "1.0");
277 				break;
278 			case 1:
279 				strcpy(pass, "1.1");
280 				break;
281 			case 3:
282 				strcpy(pass, "1.2");
283 				break;
284 			default:
285 				strcpy(pass, "1.X");
286 				break;
287 			}
288 		}
289 		break;
290 	case 4:		/* CN57XX, CN56XX, CN55XX, CN54XX */
291 		if (fus_dat2.cn56xx.raid_en) {
292 			if (l2d_fus3)
293 				family = "55";
294 			else
295 				family = "57";
296 			if (fus_dat2.cn56xx.nocrypto)
297 				suffix = "SP";
298 			else
299 				suffix = "SSP";
300 		} else {
301 			if (fus_dat2.cn56xx.nocrypto)
302 				suffix = "CP";
303 			else {
304 				suffix = "NSP";
305 				if (fus_dat3.s.nozip)
306 					suffix = "SCP";
307 
308 				if (fus_dat3.cn38xx.bar2_en)
309 					suffix = "NSPB2";
310 			}
311 			if (l2d_fus3)
312 				family = "54";
313 			else
314 				family = "56";
315 		}
316 		break;
317 	case 6:		/* CN50XX */
318 		family = "50";
319 		break;
320 	case 7:		/* CN52XX */
321 		if (l2d_fus3)
322 			family = "51";
323 		else
324 			family = "52";
325 		break;
326 	case 0x93:		/* CN61XX */
327 		family = "61";
328 		if (fus_dat2.cn61xx.nocrypto && fus_dat2.cn61xx.dorm_crypto)
329 			suffix = "AP";
330 		if (fus_dat2.cn61xx.nocrypto)
331 			suffix = "CP";
332 		else if (fus_dat2.cn61xx.dorm_crypto)
333 			suffix = "DAP";
334 		else if (fus_dat3.cn61xx.nozip)
335 			suffix = "SCP";
336 		break;
337 	case 0x90:		/* CN63XX */
338 		family = "63";
339 		if (fus_dat3.s.l2c_crip == 2)
340 			family = "62";
341 		if (num_cores == 6)	/* Other core counts match generic */
342 			core_model = "35";
343 		if (fus_dat2.cn63xx.nocrypto)
344 			suffix = "CP";
345 		else if (fus_dat2.cn63xx.dorm_crypto)
346 			suffix = "DAP";
347 		else if (fus_dat3.cn61xx.nozip)
348 			suffix = "SCP";
349 		else
350 			suffix = "AAP";
351 		break;
352 	case 0x92:		/* CN66XX */
353 		family = "66";
354 		if (num_cores == 6)	/* Other core counts match generic */
355 			core_model = "35";
356 		if (fus_dat2.cn66xx.nocrypto && fus_dat2.cn66xx.dorm_crypto)
357 			suffix = "AP";
358 		if (fus_dat2.cn66xx.nocrypto)
359 			suffix = "CP";
360 		else if (fus_dat2.cn66xx.dorm_crypto)
361 			suffix = "DAP";
362 		else if (fus_dat3.cn61xx.nozip)
363 			suffix = "SCP";
364 		else
365 			suffix = "AAP";
366 		break;
367 	case 0x91:		/* CN68XX */
368 		family = "68";
369 		if (fus_dat2.cn68xx.nocrypto && fus_dat3.cn61xx.nozip)
370 			suffix = "CP";
371 		else if (fus_dat2.cn68xx.dorm_crypto)
372 			suffix = "DAP";
373 		else if (fus_dat3.cn61xx.nozip)
374 			suffix = "SCP";
375 		else if (fus_dat2.cn68xx.nocrypto)
376 			suffix = "SP";
377 		else
378 			suffix = "AAP";
379 		break;
380 	case 0x94:		/* CNF71XX */
381 		family = "F71";
382 		if (fus_dat3.cn61xx.nozip)
383 			suffix = "SCP";
384 		else
385 			suffix = "AAP";
386 		break;
387 	case 0x95:		/* CN78XX */
388 		if (num_cores == 6)	/* Other core counts match generic */
389 			core_model = "35";
390 		if (OCTEON_IS_MODEL(OCTEON_CN76XX))
391 			family = "76";
392 		else
393 			family = "78";
394 		if (fus_dat3.cn78xx.l2c_crip == 2)
395 			family = "77";
396 		if (fus_dat3.cn78xx.nozip
397 		    && fus_dat3.cn78xx.nodfa_dte
398 		    && fus_dat3.cn78xx.nohna_dte) {
399 			if (fus_dat3.cn78xx.nozip &&
400 				!fus_dat2.cn78xx.raid_en &&
401 				fus_dat3.cn78xx.nohna_dte) {
402 				suffix = "CP";
403 			} else {
404 				suffix = "SCP";
405 			}
406 		} else if (fus_dat2.cn78xx.raid_en == 0)
407 			suffix = "HCP";
408 		else
409 			suffix = "AAP";
410 		break;
411 	case 0x96:		/* CN70XX */
412 		family = "70";
413 		if (cvmx_read_csr(CVMX_MIO_FUS_PDF) & (0x1ULL << 32))
414 			family = "71";
415 		if (fus_dat2.cn70xx.nocrypto)
416 			suffix = "CP";
417 		else if (fus_dat3.cn70xx.nodfa_dte)
418 			suffix = "SCP";
419 		else
420 			suffix = "AAP";
421 		break;
422 	case 0x97:		/* CN73XX */
423 		if (num_cores == 6)	/* Other core counts match generic */
424 			core_model = "35";
425 		family = "73";
426 		if (fus_dat3.cn73xx.l2c_crip == 2)
427 			family = "72";
428 		if (fus_dat3.cn73xx.nozip
429 				&& fus_dat3.cn73xx.nodfa_dte
430 				&& fus_dat3.cn73xx.nohna_dte) {
431 			if (!fus_dat2.cn73xx.raid_en)
432 				suffix = "CP";
433 			else
434 				suffix = "SCP";
435 		} else
436 			suffix = "AAP";
437 		break;
438 	case 0x98:		/* CN75XX */
439 		family = "F75";
440 		if (fus_dat3.cn78xx.nozip
441 		    && fus_dat3.cn78xx.nodfa_dte
442 		    && fus_dat3.cn78xx.nohna_dte)
443 			suffix = "SCP";
444 		else
445 			suffix = "AAP";
446 		break;
447 	default:
448 		family = "XX";
449 		core_model = "XX";
450 		strcpy(pass, "X.X");
451 		suffix = "XXX";
452 		break;
453 	}
454 
455 	clock_mhz = octeon_get_clock_rate() / 1000000;
456 	if (family[0] != '3') {
457 		int fuse_base = 384 / 8;
458 		if (family[0] == '6')
459 			fuse_base = 832 / 8;
460 
461 		/* Check for model in fuses, overrides normal decode */
462 		/* This is _not_ valid for Octeon CN3XXX models */
463 		fuse_data |= cvmx_fuse_read_byte(fuse_base + 3);
464 		fuse_data = fuse_data << 8;
465 		fuse_data |= cvmx_fuse_read_byte(fuse_base + 2);
466 		fuse_data = fuse_data << 8;
467 		fuse_data |= cvmx_fuse_read_byte(fuse_base + 1);
468 		fuse_data = fuse_data << 8;
469 		fuse_data |= cvmx_fuse_read_byte(fuse_base);
470 		if (fuse_data & 0x7ffff) {
471 			int model = fuse_data & 0x3fff;
472 			int suffix = (fuse_data >> 14) & 0x1f;
473 			if (suffix && model) {
474 				/* Have both number and suffix in fuses, so both */
475 				sprintf(fuse_model, "%d%c", model, 'A' + suffix - 1);
476 				core_model = "";
477 				family = fuse_model;
478 			} else if (suffix && !model) {
479 				/* Only have suffix, so add suffix to 'normal' model number */
480 				sprintf(fuse_model, "%s%c", core_model, 'A' + suffix - 1);
481 				core_model = fuse_model;
482 			} else {
483 				/* Don't have suffix, so just use model from fuses */
484 				sprintf(fuse_model, "%d", model);
485 				core_model = "";
486 				family = fuse_model;
487 			}
488 		}
489 	}
490 	sprintf(buffer, "CN%s%sp%s-%d-%s", family, core_model, pass, clock_mhz, suffix);
491 	return buffer;
492 }
493 
494 /**
495  * Given the chip processor ID from COP0, this function returns a
496  * string representing the chip model number. The string is of the
497  * form CNXXXXpX.X-FREQ-SUFFIX.
498  * - XXXX = The chip model number
499  * - X.X = Chip pass number
500  * - FREQ = Current frequency in Mhz
501  * - SUFFIX = NSP, EXP, SCP, SSP, or CP
502  *
503  * @chip_id: Chip ID
504  *
505  * Returns Model string
506  */
octeon_model_get_string(uint32_t chip_id)507 const char *__init octeon_model_get_string(uint32_t chip_id)
508 {
509 	static char buffer[32];
510 	return octeon_model_get_string_buffer(chip_id, buffer);
511 }
512