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1/*
2 * linux/arch/arm/mach-omap2/id.c
3 *
4 * OMAP2 CPU identification code
5 *
6 * Copyright (C) 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
8 *
9 * Copyright (C) 2009-11 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/io.h>
21#include <linux/random.h>
22#include <linux/slab.h>
23
24#ifdef CONFIG_SOC_BUS
25#include <linux/sys_soc.h>
26#endif
27
28#include <asm/cputype.h>
29
30#include "common.h"
31
32#include "id.h"
33
34#include "soc.h"
35#include "control.h"
36
37#define OMAP4_SILICON_TYPE_STANDARD 0x01
38#define OMAP4_SILICON_TYPE_PERFORMANCE 0x02
39
40#define OMAP_SOC_MAX_NAME_LENGTH 16
41
42static unsigned int omap_revision;
43static char soc_name[OMAP_SOC_MAX_NAME_LENGTH];
44static char soc_rev[OMAP_SOC_MAX_NAME_LENGTH];
45u32 omap_features;
46
47unsigned int omap_rev(void)
48{
49 return omap_revision;
50}
51EXPORT_SYMBOL(omap_rev);
52
53int omap_type(void)
54{
55 static u32 val = OMAP2_DEVICETYPE_MASK;
56
57 if (val < OMAP2_DEVICETYPE_MASK)
58 return val;
59
60 if (soc_is_omap24xx()) {
61 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
62 } else if (soc_is_ti81xx()) {
63 val = omap_ctrl_readl(TI81XX_CONTROL_STATUS);
64 } else if (soc_is_am33xx() || soc_is_am43xx()) {
65 val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
66 } else if (soc_is_omap34xx()) {
67 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
68 } else if (soc_is_omap44xx()) {
69 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
70 } else if (soc_is_omap54xx() || soc_is_dra7xx()) {
71 val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
72 val &= OMAP5_DEVICETYPE_MASK;
73 val >>= 6;
74 goto out;
75 } else {
76 pr_err("Cannot detect omap type!\n");
77 goto out;
78 }
79
80 val &= OMAP2_DEVICETYPE_MASK;
81 val >>= 8;
82
83out:
84 return val;
85}
86EXPORT_SYMBOL(omap_type);
87
88
89/*----------------------------------------------------------------------------*/
90
91#define OMAP_TAP_IDCODE 0x0204
92#define OMAP_TAP_DIE_ID_0 0x0218
93#define OMAP_TAP_DIE_ID_1 0x021C
94#define OMAP_TAP_DIE_ID_2 0x0220
95#define OMAP_TAP_DIE_ID_3 0x0224
96
97#define OMAP_TAP_DIE_ID_44XX_0 0x0200
98#define OMAP_TAP_DIE_ID_44XX_1 0x0208
99#define OMAP_TAP_DIE_ID_44XX_2 0x020c
100#define OMAP_TAP_DIE_ID_44XX_3 0x0210
101
102#define read_tap_reg(reg) readl_relaxed(tap_base + (reg))
103
104struct omap_id {
105 u16 hawkeye; /* Silicon type (Hawkeye id) */
106 u8 dev; /* Device type from production_id reg */
107 u32 type; /* Combined type id copied to omap_revision */
108};
109
110/* Register values to detect the OMAP version */
111static struct omap_id omap_ids[] __initdata = {
112 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
113 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
114 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
115 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
116 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
117 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
118};
119
120static void __iomem *tap_base;
121static u16 tap_prod_id;
122
123void omap_get_die_id(struct omap_die_id *odi)
124{
125 if (soc_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) {
126 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
127 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
128 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
129 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
130
131 return;
132 }
133 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
134 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
135 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
136 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
137}
138
139static int __init omap_feed_randpool(void)
140{
141 struct omap_die_id odi;
142
143 /* Throw the die ID into the entropy pool at boot */
144 omap_get_die_id(&odi);
145 add_device_randomness(&odi, sizeof(odi));
146 return 0;
147}
148omap_device_initcall(omap_feed_randpool);
149
150void __init omap2xxx_check_revision(void)
151{
152 int i, j;
153 u32 idcode, prod_id;
154 u16 hawkeye;
155 u8 dev_type, rev;
156 struct omap_die_id odi;
157
158 idcode = read_tap_reg(OMAP_TAP_IDCODE);
159 prod_id = read_tap_reg(tap_prod_id);
160 hawkeye = (idcode >> 12) & 0xffff;
161 rev = (idcode >> 28) & 0x0f;
162 dev_type = (prod_id >> 16) & 0x0f;
163 omap_get_die_id(&odi);
164
165 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
166 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
167 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
168 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
169 odi.id_1, (odi.id_1 >> 28) & 0xf);
170 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
171 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
172 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
173 prod_id, dev_type);
174
175 /* Check hawkeye ids */
176 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
177 if (hawkeye == omap_ids[i].hawkeye)
178 break;
179 }
180
181 if (i == ARRAY_SIZE(omap_ids)) {
182 printk(KERN_ERR "Unknown OMAP CPU id\n");
183 return;
184 }
185
186 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
187 if (dev_type == omap_ids[j].dev)
188 break;
189 }
190
191 if (j == ARRAY_SIZE(omap_ids)) {
192 pr_err("Unknown OMAP device type. Handling it as OMAP%04x\n",
193 omap_ids[i].type >> 16);
194 j = i;
195 }
196
197 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
198 sprintf(soc_rev, "ES%x", (omap_rev() >> 12) & 0xf);
199
200 pr_info("%s", soc_name);
201 if ((omap_rev() >> 8) & 0x0f)
202 pr_info("%s", soc_rev);
203 pr_info("\n");
204}
205
206#define OMAP3_SHOW_FEATURE(feat) \
207 if (omap3_has_ ##feat()) \
208 n += scnprintf(buf + n, sizeof(buf) - n, #feat " ");
209
210static void __init omap3_cpuinfo(void)
211{
212 const char *cpu_name;
213 char buf[64];
214 int n = 0;
215
216 memset(buf, 0, sizeof(buf));
217
218 /*
219 * OMAP3430 and OMAP3530 are assumed to be same.
220 *
221 * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
222 * on available features. Upon detection, update the CPU id
223 * and CPU class bits.
224 */
225 if (soc_is_omap3630()) {
226 cpu_name = "OMAP3630";
227 } else if (soc_is_am35xx()) {
228 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
229 } else if (soc_is_ti816x()) {
230 cpu_name = "TI816X";
231 } else if (soc_is_am335x()) {
232 cpu_name = "AM335X";
233 } else if (soc_is_am437x()) {
234 cpu_name = "AM437x";
235 } else if (soc_is_ti814x()) {
236 cpu_name = "TI814X";
237 } else if (omap3_has_iva() && omap3_has_sgx()) {
238 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
239 cpu_name = "OMAP3430/3530";
240 } else if (omap3_has_iva()) {
241 cpu_name = "OMAP3525";
242 } else if (omap3_has_sgx()) {
243 cpu_name = "OMAP3515";
244 } else {
245 cpu_name = "OMAP3503";
246 }
247
248 scnprintf(soc_name, sizeof(soc_name), "%s", cpu_name);
249
250 /* Print verbose information */
251 n += scnprintf(buf, sizeof(buf) - n, "%s %s (", soc_name, soc_rev);
252
253 OMAP3_SHOW_FEATURE(l2cache);
254 OMAP3_SHOW_FEATURE(iva);
255 OMAP3_SHOW_FEATURE(sgx);
256 OMAP3_SHOW_FEATURE(neon);
257 OMAP3_SHOW_FEATURE(isp);
258 OMAP3_SHOW_FEATURE(192mhz_clk);
259 if (*(buf + n - 1) == ' ')
260 n--;
261 n += scnprintf(buf + n, sizeof(buf) - n, ")\n");
262 pr_info("%s", buf);
263}
264
265#define OMAP3_CHECK_FEATURE(status,feat) \
266 if (((status & OMAP3_ ##feat## _MASK) \
267 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \
268 omap_features |= OMAP3_HAS_ ##feat; \
269 }
270
271void __init omap3xxx_check_features(void)
272{
273 u32 status;
274
275 omap_features = 0;
276
277 status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
278
279 OMAP3_CHECK_FEATURE(status, L2CACHE);
280 OMAP3_CHECK_FEATURE(status, IVA);
281 OMAP3_CHECK_FEATURE(status, SGX);
282 OMAP3_CHECK_FEATURE(status, NEON);
283 OMAP3_CHECK_FEATURE(status, ISP);
284 if (soc_is_omap3630())
285 omap_features |= OMAP3_HAS_192MHZ_CLK;
286 if (soc_is_omap3430() || soc_is_omap3630())
287 omap_features |= OMAP3_HAS_IO_WAKEUP;
288 if (soc_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
289 omap_rev() == OMAP3430_REV_ES3_1_2)
290 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
291
292 omap_features |= OMAP3_HAS_SDRC;
293
294 /*
295 * am35x fixups:
296 * - The am35x Chip ID register has bits 12, 7:5, and 3:2 marked as
297 * reserved and therefore return 0 when read. Unfortunately,
298 * OMAP3_CHECK_FEATURE() will interpret some of those zeroes to
299 * mean that a feature is present even though it isn't so clear
300 * the incorrectly set feature bits.
301 */
302 if (soc_is_am35xx())
303 omap_features &= ~(OMAP3_HAS_IVA | OMAP3_HAS_ISP);
304
305 /*
306 * TODO: Get additional info (where applicable)
307 * e.g. Size of L2 cache.
308 */
309
310 omap3_cpuinfo();
311}
312
313void __init omap4xxx_check_features(void)
314{
315 u32 si_type;
316
317 si_type =
318 (read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1) >> 16) & 0x03;
319
320 if (si_type == OMAP4_SILICON_TYPE_PERFORMANCE)
321 omap_features = OMAP4_HAS_PERF_SILICON;
322}
323
324void __init ti81xx_check_features(void)
325{
326 omap_features = OMAP3_HAS_NEON;
327 omap3_cpuinfo();
328}
329
330void __init am33xx_check_features(void)
331{
332 u32 status;
333
334 omap_features = OMAP3_HAS_NEON;
335
336 status = omap_ctrl_readl(AM33XX_DEV_FEATURE);
337 if (status & AM33XX_SGX_MASK)
338 omap_features |= OMAP3_HAS_SGX;
339
340 omap3_cpuinfo();
341}
342
343void __init omap3xxx_check_revision(void)
344{
345 const char *cpu_rev;
346 u32 cpuid, idcode;
347 u16 hawkeye;
348 u8 rev;
349
350 /*
351 * We cannot access revision registers on ES1.0.
352 * If the processor type is Cortex-A8 and the revision is 0x0
353 * it means its Cortex r0p0 which is 3430 ES1.0.
354 */
355 cpuid = read_cpuid_id();
356 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
357 omap_revision = OMAP3430_REV_ES1_0;
358 cpu_rev = "1.0";
359 return;
360 }
361
362 /*
363 * Detection for 34xx ES2.0 and above can be done with just
364 * hawkeye and rev. See TRM 1.5.2 Device Identification.
365 * Note that rev does not map directly to our defined processor
366 * revision numbers as ES1.0 uses value 0.
367 */
368 idcode = read_tap_reg(OMAP_TAP_IDCODE);
369 hawkeye = (idcode >> 12) & 0xffff;
370 rev = (idcode >> 28) & 0xff;
371
372 switch (hawkeye) {
373 case 0xb7ae:
374 /* Handle 34xx/35xx devices */
375 switch (rev) {
376 case 0: /* Take care of early samples */
377 case 1:
378 omap_revision = OMAP3430_REV_ES2_0;
379 cpu_rev = "2.0";
380 break;
381 case 2:
382 omap_revision = OMAP3430_REV_ES2_1;
383 cpu_rev = "2.1";
384 break;
385 case 3:
386 omap_revision = OMAP3430_REV_ES3_0;
387 cpu_rev = "3.0";
388 break;
389 case 4:
390 omap_revision = OMAP3430_REV_ES3_1;
391 cpu_rev = "3.1";
392 break;
393 case 7:
394 /* FALLTHROUGH */
395 default:
396 /* Use the latest known revision as default */
397 omap_revision = OMAP3430_REV_ES3_1_2;
398 cpu_rev = "3.1.2";
399 }
400 break;
401 case 0xb868:
402 /*
403 * Handle OMAP/AM 3505/3517 devices
404 *
405 * Set the device to be OMAP3517 here. Actual device
406 * is identified later based on the features.
407 */
408 switch (rev) {
409 case 0:
410 omap_revision = AM35XX_REV_ES1_0;
411 cpu_rev = "1.0";
412 break;
413 case 1:
414 /* FALLTHROUGH */
415 default:
416 omap_revision = AM35XX_REV_ES1_1;
417 cpu_rev = "1.1";
418 }
419 break;
420 case 0xb891:
421 /* Handle 36xx devices */
422
423 switch(rev) {
424 case 0: /* Take care of early samples */
425 omap_revision = OMAP3630_REV_ES1_0;
426 cpu_rev = "1.0";
427 break;
428 case 1:
429 omap_revision = OMAP3630_REV_ES1_1;
430 cpu_rev = "1.1";
431 break;
432 case 2:
433 /* FALLTHROUGH */
434 default:
435 omap_revision = OMAP3630_REV_ES1_2;
436 cpu_rev = "1.2";
437 }
438 break;
439 case 0xb81e:
440 switch (rev) {
441 case 0:
442 omap_revision = TI8168_REV_ES1_0;
443 cpu_rev = "1.0";
444 break;
445 case 1:
446 omap_revision = TI8168_REV_ES1_1;
447 cpu_rev = "1.1";
448 break;
449 case 2:
450 omap_revision = TI8168_REV_ES2_0;
451 cpu_rev = "2.0";
452 break;
453 case 3:
454 /* FALLTHROUGH */
455 default:
456 omap_revision = TI8168_REV_ES2_1;
457 cpu_rev = "2.1";
458 }
459 break;
460 case 0xb944:
461 switch (rev) {
462 case 0:
463 omap_revision = AM335X_REV_ES1_0;
464 cpu_rev = "1.0";
465 break;
466 case 1:
467 omap_revision = AM335X_REV_ES2_0;
468 cpu_rev = "2.0";
469 break;
470 case 2:
471 /* FALLTHROUGH */
472 default:
473 omap_revision = AM335X_REV_ES2_1;
474 cpu_rev = "2.1";
475 break;
476 }
477 break;
478 case 0xb98c:
479 switch (rev) {
480 case 0:
481 omap_revision = AM437X_REV_ES1_0;
482 cpu_rev = "1.0";
483 break;
484 case 1:
485 omap_revision = AM437X_REV_ES1_1;
486 cpu_rev = "1.1";
487 break;
488 case 2:
489 /* FALLTHROUGH */
490 default:
491 omap_revision = AM437X_REV_ES1_2;
492 cpu_rev = "1.2";
493 break;
494 }
495 break;
496 case 0xb8f2:
497 case 0xb968:
498 switch (rev) {
499 case 0:
500 /* FALLTHROUGH */
501 case 1:
502 omap_revision = TI8148_REV_ES1_0;
503 cpu_rev = "1.0";
504 break;
505 case 2:
506 omap_revision = TI8148_REV_ES2_0;
507 cpu_rev = "2.0";
508 break;
509 case 3:
510 /* FALLTHROUGH */
511 default:
512 omap_revision = TI8148_REV_ES2_1;
513 cpu_rev = "2.1";
514 break;
515 }
516 break;
517 default:
518 /* Unknown default to latest silicon rev as default */
519 omap_revision = OMAP3630_REV_ES1_2;
520 cpu_rev = "1.2";
521 pr_warn("Warning: unknown chip type: hawkeye %04x, assuming OMAP3630ES1.2\n",
522 hawkeye);
523 }
524 sprintf(soc_rev, "ES%s", cpu_rev);
525}
526
527void __init omap4xxx_check_revision(void)
528{
529 u32 idcode;
530 u16 hawkeye;
531 u8 rev;
532
533 /*
534 * The IC rev detection is done with hawkeye and rev.
535 * Note that rev does not map directly to defined processor
536 * revision numbers as ES1.0 uses value 0.
537 */
538 idcode = read_tap_reg(OMAP_TAP_IDCODE);
539 hawkeye = (idcode >> 12) & 0xffff;
540 rev = (idcode >> 28) & 0xf;
541
542 /*
543 * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
544 * Use ARM register to detect the correct ES version
545 */
546 if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
547 idcode = read_cpuid_id();
548 rev = (idcode & 0xf) - 1;
549 }
550
551 switch (hawkeye) {
552 case 0xb852:
553 switch (rev) {
554 case 0:
555 omap_revision = OMAP4430_REV_ES1_0;
556 break;
557 case 1:
558 default:
559 omap_revision = OMAP4430_REV_ES2_0;
560 }
561 break;
562 case 0xb95c:
563 switch (rev) {
564 case 3:
565 omap_revision = OMAP4430_REV_ES2_1;
566 break;
567 case 4:
568 omap_revision = OMAP4430_REV_ES2_2;
569 break;
570 case 6:
571 default:
572 omap_revision = OMAP4430_REV_ES2_3;
573 }
574 break;
575 case 0xb94e:
576 switch (rev) {
577 case 0:
578 omap_revision = OMAP4460_REV_ES1_0;
579 break;
580 case 2:
581 default:
582 omap_revision = OMAP4460_REV_ES1_1;
583 break;
584 }
585 break;
586 case 0xb975:
587 switch (rev) {
588 case 0:
589 default:
590 omap_revision = OMAP4470_REV_ES1_0;
591 break;
592 }
593 break;
594 default:
595 /* Unknown default to latest silicon rev as default */
596 omap_revision = OMAP4430_REV_ES2_3;
597 }
598
599 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
600 sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
601 (omap_rev() >> 8) & 0xf);
602 pr_info("%s %s\n", soc_name, soc_rev);
603}
604
605void __init omap5xxx_check_revision(void)
606{
607 u32 idcode;
608 u16 hawkeye;
609 u8 rev;
610
611 idcode = read_tap_reg(OMAP_TAP_IDCODE);
612 hawkeye = (idcode >> 12) & 0xffff;
613 rev = (idcode >> 28) & 0xff;
614 switch (hawkeye) {
615 case 0xb942:
616 switch (rev) {
617 case 0:
618 /* No support for ES1.0 Test chip */
619 BUG();
620 case 1:
621 default:
622 omap_revision = OMAP5430_REV_ES2_0;
623 }
624 break;
625
626 case 0xb998:
627 switch (rev) {
628 case 0:
629 /* No support for ES1.0 Test chip */
630 BUG();
631 case 1:
632 default:
633 omap_revision = OMAP5432_REV_ES2_0;
634 }
635 break;
636
637 default:
638 /* Unknown default to latest silicon rev as default*/
639 omap_revision = OMAP5430_REV_ES2_0;
640 }
641
642 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
643 sprintf(soc_rev, "ES%d.0", (omap_rev() >> 12) & 0xf);
644
645 pr_info("%s %s\n", soc_name, soc_rev);
646}
647
648void __init dra7xxx_check_revision(void)
649{
650 u32 idcode;
651 u16 hawkeye;
652 u8 rev;
653
654 idcode = read_tap_reg(OMAP_TAP_IDCODE);
655 hawkeye = (idcode >> 12) & 0xffff;
656 rev = (idcode >> 28) & 0xff;
657 switch (hawkeye) {
658 case 0xb990:
659 switch (rev) {
660 case 0:
661 omap_revision = DRA752_REV_ES1_0;
662 break;
663 case 1:
664 omap_revision = DRA752_REV_ES1_1;
665 break;
666 case 2:
667 default:
668 omap_revision = DRA752_REV_ES2_0;
669 break;
670 }
671 break;
672
673 case 0xb9bc:
674 switch (rev) {
675 case 0:
676 omap_revision = DRA722_REV_ES1_0;
677 break;
678 case 1:
679 default:
680 omap_revision = DRA722_REV_ES2_0;
681 break;
682 }
683 break;
684
685 default:
686 /* Unknown default to latest silicon rev as default*/
687 pr_warn("%s: unknown idcode=0x%08x (hawkeye=0x%08x,rev=0x%x)\n",
688 __func__, idcode, hawkeye, rev);
689 omap_revision = DRA752_REV_ES2_0;
690 }
691
692 sprintf(soc_name, "DRA%03x", omap_rev() >> 16);
693 sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
694 (omap_rev() >> 8) & 0xf);
695
696 pr_info("%s %s\n", soc_name, soc_rev);
697}
698
699/*
700 * Set up things for map_io and processor detection later on. Gets called
701 * pretty much first thing from board init. For multi-omap, this gets
702 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
703 * detect the exact revision later on in omap2_detect_revision() once map_io
704 * is done.
705 */
706void __init omap2_set_globals_tap(u32 class, void __iomem *tap)
707{
708 omap_revision = class;
709 tap_base = tap;
710
711 /* XXX What is this intended to do? */
712 if (soc_is_omap34xx())
713 tap_prod_id = 0x0210;
714 else
715 tap_prod_id = 0x0208;
716}
717
718#ifdef CONFIG_SOC_BUS
719
720static const char * const omap_types[] = {
721 [OMAP2_DEVICE_TYPE_TEST] = "TST",
722 [OMAP2_DEVICE_TYPE_EMU] = "EMU",
723 [OMAP2_DEVICE_TYPE_SEC] = "HS",
724 [OMAP2_DEVICE_TYPE_GP] = "GP",
725 [OMAP2_DEVICE_TYPE_BAD] = "BAD",
726};
727
728static const char * __init omap_get_family(void)
729{
730 if (soc_is_omap24xx())
731 return kasprintf(GFP_KERNEL, "OMAP2");
732 else if (soc_is_omap34xx())
733 return kasprintf(GFP_KERNEL, "OMAP3");
734 else if (soc_is_omap44xx())
735 return kasprintf(GFP_KERNEL, "OMAP4");
736 else if (soc_is_omap54xx())
737 return kasprintf(GFP_KERNEL, "OMAP5");
738 else if (soc_is_am33xx() || soc_is_am335x())
739 return kasprintf(GFP_KERNEL, "AM33xx");
740 else if (soc_is_am43xx())
741 return kasprintf(GFP_KERNEL, "AM43xx");
742 else if (soc_is_dra7xx())
743 return kasprintf(GFP_KERNEL, "DRA7");
744 else
745 return kasprintf(GFP_KERNEL, "Unknown");
746}
747
748static ssize_t omap_get_type(struct device *dev,
749 struct device_attribute *attr,
750 char *buf)
751{
752 return sprintf(buf, "%s\n", omap_types[omap_type()]);
753}
754
755static struct device_attribute omap_soc_attr =
756 __ATTR(type, S_IRUGO, omap_get_type, NULL);
757
758void __init omap_soc_device_init(void)
759{
760 struct device *parent;
761 struct soc_device *soc_dev;
762 struct soc_device_attribute *soc_dev_attr;
763
764 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
765 if (!soc_dev_attr)
766 return;
767
768 soc_dev_attr->machine = soc_name;
769 soc_dev_attr->family = omap_get_family();
770 soc_dev_attr->revision = soc_rev;
771
772 soc_dev = soc_device_register(soc_dev_attr);
773 if (IS_ERR(soc_dev)) {
774 kfree(soc_dev_attr);
775 return;
776 }
777
778 parent = soc_device_to_device(soc_dev);
779 device_create_file(parent, &omap_soc_attr);
780}
781#endif /* CONFIG_SOC_BUS */
1/*
2 * linux/arch/arm/mach-omap2/id.c
3 *
4 * OMAP2 CPU identification code
5 *
6 * Copyright (C) 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
8 *
9 * Copyright (C) 2009-11 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20#include <linux/io.h>
21
22#include <asm/cputype.h>
23
24#include <plat/common.h>
25#include <plat/cpu.h>
26
27#include <mach/id.h>
28
29#include "control.h"
30
31static struct omap_chip_id omap_chip;
32static unsigned int omap_revision;
33
34u32 omap_features;
35
36unsigned int omap_rev(void)
37{
38 return omap_revision;
39}
40EXPORT_SYMBOL(omap_rev);
41
42/**
43 * omap_chip_is - test whether currently running OMAP matches a chip type
44 * @oc: omap_chip_t to test against
45 *
46 * Test whether the currently-running OMAP chip matches the supplied
47 * chip type 'oc'. Returns 1 upon a match; 0 upon failure.
48 */
49int omap_chip_is(struct omap_chip_id oci)
50{
51 return (oci.oc & omap_chip.oc) ? 1 : 0;
52}
53EXPORT_SYMBOL(omap_chip_is);
54
55int omap_type(void)
56{
57 u32 val = 0;
58
59 if (cpu_is_omap24xx()) {
60 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
61 } else if (cpu_is_omap34xx()) {
62 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
63 } else if (cpu_is_omap44xx()) {
64 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
65 } else {
66 pr_err("Cannot detect omap type!\n");
67 goto out;
68 }
69
70 val &= OMAP2_DEVICETYPE_MASK;
71 val >>= 8;
72
73out:
74 return val;
75}
76EXPORT_SYMBOL(omap_type);
77
78
79/*----------------------------------------------------------------------------*/
80
81#define OMAP_TAP_IDCODE 0x0204
82#define OMAP_TAP_DIE_ID_0 0x0218
83#define OMAP_TAP_DIE_ID_1 0x021C
84#define OMAP_TAP_DIE_ID_2 0x0220
85#define OMAP_TAP_DIE_ID_3 0x0224
86
87#define OMAP_TAP_DIE_ID_44XX_0 0x0200
88#define OMAP_TAP_DIE_ID_44XX_1 0x0208
89#define OMAP_TAP_DIE_ID_44XX_2 0x020c
90#define OMAP_TAP_DIE_ID_44XX_3 0x0210
91
92#define read_tap_reg(reg) __raw_readl(tap_base + (reg))
93
94struct omap_id {
95 u16 hawkeye; /* Silicon type (Hawkeye id) */
96 u8 dev; /* Device type from production_id reg */
97 u32 type; /* Combined type id copied to omap_revision */
98};
99
100/* Register values to detect the OMAP version */
101static struct omap_id omap_ids[] __initdata = {
102 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
103 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
104 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
105 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
106 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
107 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
108};
109
110static void __iomem *tap_base;
111static u16 tap_prod_id;
112
113void omap_get_die_id(struct omap_die_id *odi)
114{
115 if (cpu_is_omap44xx()) {
116 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
117 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
118 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
119 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
120
121 return;
122 }
123 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
124 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
125 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
126 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
127}
128
129static void __init omap24xx_check_revision(void)
130{
131 int i, j;
132 u32 idcode, prod_id;
133 u16 hawkeye;
134 u8 dev_type, rev;
135 struct omap_die_id odi;
136
137 idcode = read_tap_reg(OMAP_TAP_IDCODE);
138 prod_id = read_tap_reg(tap_prod_id);
139 hawkeye = (idcode >> 12) & 0xffff;
140 rev = (idcode >> 28) & 0x0f;
141 dev_type = (prod_id >> 16) & 0x0f;
142 omap_get_die_id(&odi);
143
144 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
145 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
146 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
147 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
148 odi.id_1, (odi.id_1 >> 28) & 0xf);
149 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
150 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
151 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
152 prod_id, dev_type);
153
154 /* Check hawkeye ids */
155 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
156 if (hawkeye == omap_ids[i].hawkeye)
157 break;
158 }
159
160 if (i == ARRAY_SIZE(omap_ids)) {
161 printk(KERN_ERR "Unknown OMAP CPU id\n");
162 return;
163 }
164
165 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
166 if (dev_type == omap_ids[j].dev)
167 break;
168 }
169
170 if (j == ARRAY_SIZE(omap_ids)) {
171 printk(KERN_ERR "Unknown OMAP device type. "
172 "Handling it as OMAP%04x\n",
173 omap_ids[i].type >> 16);
174 j = i;
175 }
176
177 pr_info("OMAP%04x", omap_rev() >> 16);
178 if ((omap_rev() >> 8) & 0x0f)
179 pr_info("ES%x", (omap_rev() >> 12) & 0xf);
180 pr_info("\n");
181}
182
183#define OMAP3_CHECK_FEATURE(status,feat) \
184 if (((status & OMAP3_ ##feat## _MASK) \
185 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \
186 omap_features |= OMAP3_HAS_ ##feat; \
187 }
188
189static void __init omap3_check_features(void)
190{
191 u32 status;
192
193 omap_features = 0;
194
195 status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
196
197 OMAP3_CHECK_FEATURE(status, L2CACHE);
198 OMAP3_CHECK_FEATURE(status, IVA);
199 OMAP3_CHECK_FEATURE(status, SGX);
200 OMAP3_CHECK_FEATURE(status, NEON);
201 OMAP3_CHECK_FEATURE(status, ISP);
202 if (cpu_is_omap3630())
203 omap_features |= OMAP3_HAS_192MHZ_CLK;
204 if (!cpu_is_omap3505() && !cpu_is_omap3517())
205 omap_features |= OMAP3_HAS_IO_WAKEUP;
206
207 omap_features |= OMAP3_HAS_SDRC;
208
209 /*
210 * TODO: Get additional info (where applicable)
211 * e.g. Size of L2 cache.
212 */
213}
214
215static void __init omap4_check_features(void)
216{
217 u32 si_type;
218
219 if (cpu_is_omap443x())
220 omap_features |= OMAP4_HAS_MPU_1GHZ;
221
222
223 if (cpu_is_omap446x()) {
224 si_type =
225 read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
226 switch ((si_type & (3 << 16)) >> 16) {
227 case 2:
228 /* High performance device */
229 omap_features |= OMAP4_HAS_MPU_1_5GHZ;
230 break;
231 case 1:
232 default:
233 /* Standard device */
234 omap_features |= OMAP4_HAS_MPU_1_2GHZ;
235 break;
236 }
237 }
238}
239
240static void __init ti816x_check_features(void)
241{
242 omap_features = OMAP3_HAS_NEON;
243}
244
245static void __init omap3_check_revision(void)
246{
247 u32 cpuid, idcode;
248 u16 hawkeye;
249 u8 rev;
250
251 omap_chip.oc = CHIP_IS_OMAP3430;
252
253 /*
254 * We cannot access revision registers on ES1.0.
255 * If the processor type is Cortex-A8 and the revision is 0x0
256 * it means its Cortex r0p0 which is 3430 ES1.0.
257 */
258 cpuid = read_cpuid(CPUID_ID);
259 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
260 omap_revision = OMAP3430_REV_ES1_0;
261 omap_chip.oc |= CHIP_IS_OMAP3430ES1;
262 return;
263 }
264
265 /*
266 * Detection for 34xx ES2.0 and above can be done with just
267 * hawkeye and rev. See TRM 1.5.2 Device Identification.
268 * Note that rev does not map directly to our defined processor
269 * revision numbers as ES1.0 uses value 0.
270 */
271 idcode = read_tap_reg(OMAP_TAP_IDCODE);
272 hawkeye = (idcode >> 12) & 0xffff;
273 rev = (idcode >> 28) & 0xff;
274
275 switch (hawkeye) {
276 case 0xb7ae:
277 /* Handle 34xx/35xx devices */
278 switch (rev) {
279 case 0: /* Take care of early samples */
280 case 1:
281 omap_revision = OMAP3430_REV_ES2_0;
282 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
283 break;
284 case 2:
285 omap_revision = OMAP3430_REV_ES2_1;
286 omap_chip.oc |= CHIP_IS_OMAP3430ES2;
287 break;
288 case 3:
289 omap_revision = OMAP3430_REV_ES3_0;
290 omap_chip.oc |= CHIP_IS_OMAP3430ES3_0;
291 break;
292 case 4:
293 omap_revision = OMAP3430_REV_ES3_1;
294 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
295 break;
296 case 7:
297 /* FALLTHROUGH */
298 default:
299 /* Use the latest known revision as default */
300 omap_revision = OMAP3430_REV_ES3_1_2;
301
302 /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */
303 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
304 }
305 break;
306 case 0xb868:
307 /* Handle OMAP35xx/AM35xx devices
308 *
309 * Set the device to be OMAP3505 here. Actual device
310 * is identified later based on the features.
311 *
312 * REVISIT: AM3505/AM3517 should have their own CHIP_IS
313 */
314 omap_revision = OMAP3505_REV(rev);
315 omap_chip.oc |= CHIP_IS_OMAP3430ES3_1;
316 break;
317 case 0xb891:
318 /* Handle 36xx devices */
319 omap_chip.oc |= CHIP_IS_OMAP3630ES1;
320
321 switch(rev) {
322 case 0: /* Take care of early samples */
323 omap_revision = OMAP3630_REV_ES1_0;
324 break;
325 case 1:
326 omap_revision = OMAP3630_REV_ES1_1;
327 omap_chip.oc |= CHIP_IS_OMAP3630ES1_1;
328 break;
329 case 2:
330 default:
331 omap_revision = OMAP3630_REV_ES1_2;
332 omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
333 }
334 break;
335 case 0xb81e:
336 omap_chip.oc = CHIP_IS_TI816X;
337
338 switch (rev) {
339 case 0:
340 omap_revision = TI8168_REV_ES1_0;
341 break;
342 case 1:
343 omap_revision = TI8168_REV_ES1_1;
344 break;
345 default:
346 omap_revision = TI8168_REV_ES1_1;
347 }
348 break;
349 default:
350 /* Unknown default to latest silicon rev as default*/
351 omap_revision = OMAP3630_REV_ES1_2;
352 omap_chip.oc |= CHIP_IS_OMAP3630ES1_2;
353 }
354}
355
356static void __init omap4_check_revision(void)
357{
358 u32 idcode;
359 u16 hawkeye;
360 u8 rev;
361
362 /*
363 * The IC rev detection is done with hawkeye and rev.
364 * Note that rev does not map directly to defined processor
365 * revision numbers as ES1.0 uses value 0.
366 */
367 idcode = read_tap_reg(OMAP_TAP_IDCODE);
368 hawkeye = (idcode >> 12) & 0xffff;
369 rev = (idcode >> 28) & 0xf;
370
371 /*
372 * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
373 * Use ARM register to detect the correct ES version
374 */
375 if (!rev && (hawkeye != 0xb94e)) {
376 idcode = read_cpuid(CPUID_ID);
377 rev = (idcode & 0xf) - 1;
378 }
379
380 switch (hawkeye) {
381 case 0xb852:
382 switch (rev) {
383 case 0:
384 omap_revision = OMAP4430_REV_ES1_0;
385 omap_chip.oc |= CHIP_IS_OMAP4430ES1;
386 break;
387 case 1:
388 default:
389 omap_revision = OMAP4430_REV_ES2_0;
390 omap_chip.oc |= CHIP_IS_OMAP4430ES2;
391 }
392 break;
393 case 0xb95c:
394 switch (rev) {
395 case 3:
396 omap_revision = OMAP4430_REV_ES2_1;
397 omap_chip.oc |= CHIP_IS_OMAP4430ES2_1;
398 break;
399 case 4:
400 default:
401 omap_revision = OMAP4430_REV_ES2_2;
402 omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
403 }
404 break;
405 case 0xb94e:
406 switch (rev) {
407 case 0:
408 default:
409 omap_revision = OMAP4460_REV_ES1_0;
410 omap_chip.oc |= CHIP_IS_OMAP4460ES1_0;
411 break;
412 }
413 break;
414 default:
415 /* Unknown default to latest silicon rev as default */
416 omap_revision = OMAP4430_REV_ES2_2;
417 omap_chip.oc |= CHIP_IS_OMAP4430ES2_2;
418 }
419
420 pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16,
421 ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
422}
423
424#define OMAP3_SHOW_FEATURE(feat) \
425 if (omap3_has_ ##feat()) \
426 printk(#feat" ");
427
428static void __init omap3_cpuinfo(void)
429{
430 u8 rev = GET_OMAP_REVISION();
431 char cpu_name[16], cpu_rev[16];
432
433 /* OMAP3430 and OMAP3530 are assumed to be same.
434 *
435 * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
436 * on available features. Upon detection, update the CPU id
437 * and CPU class bits.
438 */
439 if (cpu_is_omap3630()) {
440 strcpy(cpu_name, "OMAP3630");
441 } else if (cpu_is_omap3505()) {
442 /*
443 * AM35xx devices
444 */
445 if (omap3_has_sgx()) {
446 omap_revision = OMAP3517_REV(rev);
447 strcpy(cpu_name, "AM3517");
448 } else {
449 /* Already set in omap3_check_revision() */
450 strcpy(cpu_name, "AM3505");
451 }
452 } else if (cpu_is_ti816x()) {
453 strcpy(cpu_name, "TI816X");
454 } else if (omap3_has_iva() && omap3_has_sgx()) {
455 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
456 strcpy(cpu_name, "OMAP3430/3530");
457 } else if (omap3_has_iva()) {
458 omap_revision = OMAP3525_REV(rev);
459 strcpy(cpu_name, "OMAP3525");
460 } else if (omap3_has_sgx()) {
461 omap_revision = OMAP3515_REV(rev);
462 strcpy(cpu_name, "OMAP3515");
463 } else {
464 omap_revision = OMAP3503_REV(rev);
465 strcpy(cpu_name, "OMAP3503");
466 }
467
468 if (cpu_is_omap3630() || cpu_is_ti816x()) {
469 switch (rev) {
470 case OMAP_REVBITS_00:
471 strcpy(cpu_rev, "1.0");
472 break;
473 case OMAP_REVBITS_01:
474 strcpy(cpu_rev, "1.1");
475 break;
476 case OMAP_REVBITS_02:
477 /* FALLTHROUGH */
478 default:
479 /* Use the latest known revision as default */
480 strcpy(cpu_rev, "1.2");
481 }
482 } else if (cpu_is_omap3505() || cpu_is_omap3517()) {
483 switch (rev) {
484 case OMAP_REVBITS_00:
485 strcpy(cpu_rev, "1.0");
486 break;
487 case OMAP_REVBITS_01:
488 /* FALLTHROUGH */
489 default:
490 /* Use the latest known revision as default */
491 strcpy(cpu_rev, "1.1");
492 }
493 } else {
494 switch (rev) {
495 case OMAP_REVBITS_00:
496 strcpy(cpu_rev, "1.0");
497 break;
498 case OMAP_REVBITS_01:
499 strcpy(cpu_rev, "2.0");
500 break;
501 case OMAP_REVBITS_02:
502 strcpy(cpu_rev, "2.1");
503 break;
504 case OMAP_REVBITS_03:
505 strcpy(cpu_rev, "3.0");
506 break;
507 case OMAP_REVBITS_04:
508 strcpy(cpu_rev, "3.1");
509 break;
510 case OMAP_REVBITS_05:
511 /* FALLTHROUGH */
512 default:
513 /* Use the latest known revision as default */
514 strcpy(cpu_rev, "3.1.2");
515 }
516 }
517
518 /* Print verbose information */
519 pr_info("%s ES%s (", cpu_name, cpu_rev);
520
521 OMAP3_SHOW_FEATURE(l2cache);
522 OMAP3_SHOW_FEATURE(iva);
523 OMAP3_SHOW_FEATURE(sgx);
524 OMAP3_SHOW_FEATURE(neon);
525 OMAP3_SHOW_FEATURE(isp);
526 OMAP3_SHOW_FEATURE(192mhz_clk);
527
528 printk(")\n");
529}
530
531/*
532 * Try to detect the exact revision of the omap we're running on
533 */
534void __init omap2_check_revision(void)
535{
536 /*
537 * At this point we have an idea about the processor revision set
538 * earlier with omap2_set_globals_tap().
539 */
540 if (cpu_is_omap24xx()) {
541 omap24xx_check_revision();
542 } else if (cpu_is_omap34xx()) {
543 omap3_check_revision();
544
545 /* TI816X doesn't have feature register */
546 if (!cpu_is_ti816x())
547 omap3_check_features();
548 else
549 ti816x_check_features();
550
551 omap3_cpuinfo();
552 return;
553 } else if (cpu_is_omap44xx()) {
554 omap4_check_revision();
555 omap4_check_features();
556 return;
557 } else {
558 pr_err("OMAP revision unknown, please fix!\n");
559 }
560
561 /*
562 * OK, now we know the exact revision. Initialize omap_chip bits
563 * for powerdowmain and clockdomain code.
564 */
565 if (cpu_is_omap243x()) {
566 /* Currently only supports 2430ES2.1 and 2430-all */
567 omap_chip.oc |= CHIP_IS_OMAP2430;
568 return;
569 } else if (cpu_is_omap242x()) {
570 /* Currently only supports 2420ES2.1.1 and 2420-all */
571 omap_chip.oc |= CHIP_IS_OMAP2420;
572 return;
573 }
574
575 pr_err("Uninitialized omap_chip, please fix!\n");
576}
577
578/*
579 * Set up things for map_io and processor detection later on. Gets called
580 * pretty much first thing from board init. For multi-omap, this gets
581 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
582 * detect the exact revision later on in omap2_detect_revision() once map_io
583 * is done.
584 */
585void __init omap2_set_globals_tap(struct omap_globals *omap2_globals)
586{
587 omap_revision = omap2_globals->class;
588 tap_base = omap2_globals->tap;
589
590 if (cpu_is_omap34xx())
591 tap_prod_id = 0x0210;
592 else
593 tap_prod_id = 0x0208;
594}