Linux Audio

Check our new training course

Loading...
v6.13.7
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * linux/arch/arm/mach-omap2/id.c
  4 *
  5 * OMAP2 CPU identification code
  6 *
  7 * Copyright (C) 2005 Nokia Corporation
  8 * Written by Tony Lindgren <tony@atomide.com>
  9 *
 10 * Copyright (C) 2009-11 Texas Instruments
 11 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
 
 
 
 
 12 */
 13
 14#include <linux/module.h>
 15#include <linux/kernel.h>
 16#include <linux/init.h>
 17#include <linux/io.h>
 18#include <linux/random.h>
 19#include <linux/slab.h>
 20
 21#ifdef CONFIG_SOC_BUS
 22#include <linux/sys_soc.h>
 23#endif
 24
 25#include <asm/cputype.h>
 26
 27#include "common.h"
 
 28
 29#include "id.h"
 30
 31#include "soc.h"
 32#include "control.h"
 33
 34#define OMAP4_SILICON_TYPE_STANDARD		0x01
 35#define OMAP4_SILICON_TYPE_PERFORMANCE		0x02
 36
 37#define OMAP_SOC_MAX_NAME_LENGTH		16
 38
 39static unsigned int omap_revision;
 40static char soc_name[OMAP_SOC_MAX_NAME_LENGTH];
 41static char soc_rev[OMAP_SOC_MAX_NAME_LENGTH];
 42u32 omap_features;
 43
 44unsigned int omap_rev(void)
 45{
 46	return omap_revision;
 47}
 48EXPORT_SYMBOL(omap_rev);
 49
 50int omap_type(void)
 
 
 
 
 
 
 
 51{
 52	static u32 val = OMAP2_DEVICETYPE_MASK;
 
 
 53
 54	if (val < OMAP2_DEVICETYPE_MASK)
 55		return val;
 
 56
 57	if (soc_is_omap24xx()) {
 58		val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
 59	} else if (soc_is_ti81xx()) {
 60		val = omap_ctrl_readl(TI81XX_CONTROL_STATUS);
 61	} else if (soc_is_am33xx() || soc_is_am43xx()) {
 62		val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
 63	} else if (soc_is_omap34xx()) {
 64		val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
 65	} else if (soc_is_omap44xx()) {
 66		val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
 67	} else if (soc_is_omap54xx() || soc_is_dra7xx()) {
 68		val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
 69		val &= OMAP5_DEVICETYPE_MASK;
 70		val >>= 6;
 71		goto out;
 72	} else {
 73		pr_err("Cannot detect omap type!\n");
 74		goto out;
 75	}
 76
 77	val &= OMAP2_DEVICETYPE_MASK;
 78	val >>= 8;
 79
 80out:
 81	return val;
 82}
 83EXPORT_SYMBOL(omap_type);
 84
 85
 86/*----------------------------------------------------------------------------*/
 87
 88#define OMAP_TAP_IDCODE		0x0204
 89#define OMAP_TAP_DIE_ID_0	0x0218
 90#define OMAP_TAP_DIE_ID_1	0x021C
 91#define OMAP_TAP_DIE_ID_2	0x0220
 92#define OMAP_TAP_DIE_ID_3	0x0224
 93
 94#define OMAP_TAP_DIE_ID_44XX_0	0x0200
 95#define OMAP_TAP_DIE_ID_44XX_1	0x0208
 96#define OMAP_TAP_DIE_ID_44XX_2	0x020c
 97#define OMAP_TAP_DIE_ID_44XX_3	0x0210
 98
 99#define read_tap_reg(reg)	readl_relaxed(tap_base  + (reg))
100
101struct omap_id {
102	u16	hawkeye;	/* Silicon type (Hawkeye id) */
103	u8	dev;		/* Device type from production_id reg */
104	u32	type;		/* Combined type id copied to omap_revision */
105};
106
107/* Register values to detect the OMAP version */
108static struct omap_id omap_ids[] __initdata = {
109	{ .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
110	{ .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
111	{ .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
112	{ .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
113	{ .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
114	{ .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
115};
116
117static void __iomem *tap_base;
118static u16 tap_prod_id;
119
120static void omap_get_die_id(struct omap_die_id *odi)
121{
122	if (soc_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) {
123		odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
124		odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
125		odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
126		odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
127
128		return;
129	}
130	odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
131	odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
132	odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
133	odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
134}
135
136static int __init omap_feed_randpool(void)
137{
138	struct omap_die_id odi;
139
140	/* Throw the die ID into the entropy pool at boot */
141	omap_get_die_id(&odi);
142	add_device_randomness(&odi, sizeof(odi));
143	return 0;
144}
145omap_device_initcall(omap_feed_randpool);
146
147void __init omap2xxx_check_revision(void)
148{
149	int i, j;
150	u32 idcode, prod_id;
151	u16 hawkeye;
152	u8  dev_type, rev;
153	struct omap_die_id odi;
154
155	idcode = read_tap_reg(OMAP_TAP_IDCODE);
156	prod_id = read_tap_reg(tap_prod_id);
157	hawkeye = (idcode >> 12) & 0xffff;
158	rev = (idcode >> 28) & 0x0f;
159	dev_type = (prod_id >> 16) & 0x0f;
160	omap_get_die_id(&odi);
161
162	pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
163		 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
164	pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
165	pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
166		 odi.id_1, (odi.id_1 >> 28) & 0xf);
167	pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
168	pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
169	pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
170		 prod_id, dev_type);
171
172	/* Check hawkeye ids */
173	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
174		if (hawkeye == omap_ids[i].hawkeye)
175			break;
176	}
177
178	if (i == ARRAY_SIZE(omap_ids)) {
179		printk(KERN_ERR "Unknown OMAP CPU id\n");
180		return;
181	}
182
183	for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
184		if (dev_type == omap_ids[j].dev)
185			break;
186	}
187
188	if (j == ARRAY_SIZE(omap_ids)) {
189		pr_err("Unknown OMAP device type. Handling it as OMAP%04x\n",
190		       omap_ids[i].type >> 16);
 
191		j = i;
192	}
193
194	sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
195	sprintf(soc_rev, "ES%x", (omap_rev() >> 12) & 0xf);
196
197	pr_info("%s", soc_name);
198	if ((omap_rev() >> 8) & 0x0f)
199		pr_cont("%s", soc_rev);
200	pr_cont("\n");
201}
202
203#define OMAP3_SHOW_FEATURE(feat)		\
204	if (omap3_has_ ##feat())		\
205		n += scnprintf(buf + n, sizeof(buf) - n, #feat " ");
206
207static void __init omap3_cpuinfo(void)
208{
209	const char *cpu_name;
210	char buf[64];
211	int n = 0;
212
213	memset(buf, 0, sizeof(buf));
214
215	/*
216	 * OMAP3430 and OMAP3530 are assumed to be same.
217	 *
218	 * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
219	 * on available features. Upon detection, update the CPU id
220	 * and CPU class bits.
221	 */
222	if (soc_is_omap3630()) {
223		if (omap3_has_iva() && omap3_has_sgx()) {
224			cpu_name = (omap3_has_isp()) ? "OMAP3630/DM3730" : "OMAP3621";
225		} else if (omap3_has_iva()) {
226			cpu_name = "DM3725";
227		} else if (omap3_has_sgx()) {
228			cpu_name = "OMAP3615/AM3715";
229		} else {
230			cpu_name = (omap3_has_isp()) ? "AM3703" : "OMAP3611";
231		}
232	} else if (soc_is_am35xx()) {
233		cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
234	} else if (soc_is_ti816x()) {
235		cpu_name = "TI816X";
236	} else if (soc_is_am335x()) {
237		cpu_name =  "AM335X";
238	} else if (soc_is_am437x()) {
239		cpu_name =  "AM437x";
240	} else if (soc_is_ti814x()) {
241		cpu_name = "TI814X";
242	} else if (omap3_has_iva() && omap3_has_sgx()) {
243		/* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
244		cpu_name = "OMAP3430/3530";
245	} else if (omap3_has_iva()) {
246		cpu_name = "OMAP3525";
247	} else if (omap3_has_sgx()) {
248		cpu_name = "OMAP3515";
249	} else {
250		cpu_name = "OMAP3503";
251	}
252
253	scnprintf(soc_name, sizeof(soc_name), "%s", cpu_name);
254
255	/* Print verbose information */
256	n += scnprintf(buf, sizeof(buf) - n, "%s %s (", soc_name, soc_rev);
257
258	OMAP3_SHOW_FEATURE(l2cache);
259	OMAP3_SHOW_FEATURE(iva);
260	OMAP3_SHOW_FEATURE(sgx);
261	OMAP3_SHOW_FEATURE(neon);
262	OMAP3_SHOW_FEATURE(isp);
263	OMAP3_SHOW_FEATURE(192mhz_clk);
264	if (*(buf + n - 1) == ' ')
265		n--;
266	n += scnprintf(buf + n, sizeof(buf) - n, ")\n");
267	pr_info("%s", buf);
268}
269
270#define OMAP3_CHECK_FEATURE(status,feat)				\
271	if (((status & OMAP3_ ##feat## _MASK) 				\
272		>> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { 	\
273		omap_features |= OMAP3_HAS_ ##feat;			\
274	}
275
276void __init omap3xxx_check_features(void)
277{
278	u32 status;
279
280	omap_features = 0;
281
282	status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
283
284	OMAP3_CHECK_FEATURE(status, L2CACHE);
285	OMAP3_CHECK_FEATURE(status, IVA);
286	OMAP3_CHECK_FEATURE(status, SGX);
287	OMAP3_CHECK_FEATURE(status, NEON);
288	OMAP3_CHECK_FEATURE(status, ISP);
289	if (soc_is_omap3630())
290		omap_features |= OMAP3_HAS_192MHZ_CLK;
291	if (soc_is_omap3430() || soc_is_omap3630())
292		omap_features |= OMAP3_HAS_IO_WAKEUP;
293	if (soc_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
294	    omap_rev() == OMAP3430_REV_ES3_1_2)
295		omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
296
297	omap_features |= OMAP3_HAS_SDRC;
298
299	/*
300	 * am35x fixups:
301	 * - The am35x Chip ID register has bits 12, 7:5, and 3:2 marked as
302	 *   reserved and therefore return 0 when read.  Unfortunately,
303	 *   OMAP3_CHECK_FEATURE() will interpret some of those zeroes to
304	 *   mean that a feature is present even though it isn't so clear
305	 *   the incorrectly set feature bits.
306	 */
307	if (soc_is_am35xx())
308		omap_features &= ~(OMAP3_HAS_IVA | OMAP3_HAS_ISP);
309
310	/*
311	 * TODO: Get additional info (where applicable)
312	 *       e.g. Size of L2 cache.
313	 */
314
315	omap3_cpuinfo();
316}
317
318void __init omap4xxx_check_features(void)
319{
320	u32 si_type;
321
322	si_type =
323	(read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1) >> 16) & 0x03;
324
325	if (si_type == OMAP4_SILICON_TYPE_PERFORMANCE)
326		omap_features = OMAP4_HAS_PERF_SILICON;
327}
328
329void __init ti81xx_check_features(void)
330{
331	omap_features = OMAP3_HAS_NEON;
332	omap3_cpuinfo();
 
 
 
 
 
 
 
 
 
 
 
333}
334
335void __init am33xx_check_features(void)
336{
337	u32 status;
338
339	omap_features = OMAP3_HAS_NEON;
340
341	status = omap_ctrl_readl(AM33XX_DEV_FEATURE);
342	if (status & AM33XX_SGX_MASK)
343		omap_features |= OMAP3_HAS_SGX;
344
345	omap3_cpuinfo();
346}
347
348void __init omap3xxx_check_revision(void)
349{
350	const char *cpu_rev;
351	u32 cpuid, idcode;
352	u16 hawkeye;
353	u8 rev;
354
 
 
355	/*
356	 * We cannot access revision registers on ES1.0.
357	 * If the processor type is Cortex-A8 and the revision is 0x0
358	 * it means its Cortex r0p0 which is 3430 ES1.0.
359	 */
360	cpuid = read_cpuid_id();
361	if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
362		omap_revision = OMAP3430_REV_ES1_0;
363		cpu_rev = "1.0";
364		return;
365	}
366
367	/*
368	 * Detection for 34xx ES2.0 and above can be done with just
369	 * hawkeye and rev. See TRM 1.5.2 Device Identification.
370	 * Note that rev does not map directly to our defined processor
371	 * revision numbers as ES1.0 uses value 0.
372	 */
373	idcode = read_tap_reg(OMAP_TAP_IDCODE);
374	hawkeye = (idcode >> 12) & 0xffff;
375	rev = (idcode >> 28) & 0xff;
376
377	switch (hawkeye) {
378	case 0xb7ae:
379		/* Handle 34xx/35xx devices */
380		switch (rev) {
381		case 0: /* Take care of early samples */
382		case 1:
383			omap_revision = OMAP3430_REV_ES2_0;
384			cpu_rev = "2.0";
385			break;
386		case 2:
387			omap_revision = OMAP3430_REV_ES2_1;
388			cpu_rev = "2.1";
389			break;
390		case 3:
391			omap_revision = OMAP3430_REV_ES3_0;
392			cpu_rev = "3.0";
393			break;
394		case 4:
395			omap_revision = OMAP3430_REV_ES3_1;
396			cpu_rev = "3.1";
397			break;
398		case 7:
 
399		default:
400			/* Use the latest known revision as default */
401			omap_revision = OMAP3430_REV_ES3_1_2;
402			cpu_rev = "3.1.2";
 
 
403		}
404		break;
405	case 0xb868:
406		/*
407		 * Handle OMAP/AM 3505/3517 devices
408		 *
409		 * Set the device to be OMAP3517 here. Actual device
410		 * is identified later based on the features.
 
 
411		 */
412		switch (rev) {
413		case 0:
414			omap_revision = AM35XX_REV_ES1_0;
415			cpu_rev = "1.0";
416			break;
417		case 1:
418		default:
419			omap_revision = AM35XX_REV_ES1_1;
420			cpu_rev = "1.1";
421		}
422		break;
423	case 0xb891:
424		/* Handle 36xx devices */
 
425
426		switch(rev) {
427		case 0: /* Take care of early samples */
428			omap_revision = OMAP3630_REV_ES1_0;
429			cpu_rev = "1.0";
430			break;
431		case 1:
432			omap_revision = OMAP3630_REV_ES1_1;
433			cpu_rev = "1.1";
434			break;
435		case 2:
436		default:
437			omap_revision = OMAP3630_REV_ES1_2;
438			cpu_rev = "1.2";
439		}
440		break;
441	case 0xb81e:
 
 
442		switch (rev) {
443		case 0:
444			omap_revision = TI8168_REV_ES1_0;
445			cpu_rev = "1.0";
446			break;
447		case 1:
448			omap_revision = TI8168_REV_ES1_1;
449			cpu_rev = "1.1";
450			break;
451		case 2:
452			omap_revision = TI8168_REV_ES2_0;
453			cpu_rev = "2.0";
454			break;
455		case 3:
456		default:
457			omap_revision = TI8168_REV_ES2_1;
458			cpu_rev = "2.1";
459		}
460		break;
461	case 0xb944:
462		switch (rev) {
463		case 0:
464			omap_revision = AM335X_REV_ES1_0;
465			cpu_rev = "1.0";
466			break;
467		case 1:
468			omap_revision = AM335X_REV_ES2_0;
469			cpu_rev = "2.0";
470			break;
471		case 2:
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		default:
490			omap_revision = AM437X_REV_ES1_2;
491			cpu_rev = "1.2";
492			break;
493		}
494		break;
495	case 0xb8f2:
496	case 0xb968:
497		switch (rev) {
498		case 0:
499		case 1:
500			omap_revision = TI8148_REV_ES1_0;
501			cpu_rev = "1.0";
502			break;
503		case 2:
504			omap_revision = TI8148_REV_ES2_0;
505			cpu_rev = "2.0";
506			break;
507		case 3:
508		default:
509			omap_revision = TI8148_REV_ES2_1;
510			cpu_rev = "2.1";
511			break;
512		}
513		break;
514	default:
515		/* Unknown default to latest silicon rev as default */
516		omap_revision = OMAP3630_REV_ES1_2;
517		cpu_rev = "1.2";
518		pr_warn("Warning: unknown chip type: hawkeye %04x, assuming OMAP3630ES1.2\n",
519			hawkeye);
520	}
521	sprintf(soc_rev, "ES%s", cpu_rev);
522}
523
524void __init omap4xxx_check_revision(void)
525{
526	u32 idcode;
527	u16 hawkeye;
528	u8 rev;
529
530	/*
531	 * The IC rev detection is done with hawkeye and rev.
532	 * Note that rev does not map directly to defined processor
533	 * revision numbers as ES1.0 uses value 0.
534	 */
535	idcode = read_tap_reg(OMAP_TAP_IDCODE);
536	hawkeye = (idcode >> 12) & 0xffff;
537	rev = (idcode >> 28) & 0xf;
538
539	/*
540	 * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
541	 * Use ARM register to detect the correct ES version
542	 */
543	if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
544		idcode = read_cpuid_id();
545		rev = (idcode & 0xf) - 1;
546	}
547
548	switch (hawkeye) {
549	case 0xb852:
550		switch (rev) {
551		case 0:
552			omap_revision = OMAP4430_REV_ES1_0;
 
553			break;
554		case 1:
555		default:
556			omap_revision = OMAP4430_REV_ES2_0;
 
557		}
558		break;
559	case 0xb95c:
560		switch (rev) {
561		case 3:
562			omap_revision = OMAP4430_REV_ES2_1;
 
563			break;
564		case 4:
565			omap_revision = OMAP4430_REV_ES2_2;
566			break;
567		case 6:
568		default:
569			omap_revision = OMAP4430_REV_ES2_3;
 
570		}
571		break;
572	case 0xb94e:
573		switch (rev) {
574		case 0:
575			omap_revision = OMAP4460_REV_ES1_0;
576			break;
577		case 2:
578		default:
579			omap_revision = OMAP4460_REV_ES1_1;
580			break;
581		}
582		break;
583	case 0xb975:
584		switch (rev) {
585		case 0:
586		default:
587			omap_revision = OMAP4470_REV_ES1_0;
 
588			break;
589		}
590		break;
591	default:
592		/* Unknown default to latest silicon rev as default */
593		omap_revision = OMAP4430_REV_ES2_3;
 
594	}
595
596	sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
597	sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
598						(omap_rev() >> 8) & 0xf);
599	pr_info("%s %s\n", soc_name, soc_rev);
600}
601
602void __init omap5xxx_check_revision(void)
 
 
 
 
603{
604	u32 idcode;
605	u16 hawkeye;
606	u8 rev;
607
608	idcode = read_tap_reg(OMAP_TAP_IDCODE);
609	hawkeye = (idcode >> 12) & 0xffff;
610	rev = (idcode >> 28) & 0xff;
611	switch (hawkeye) {
612	case 0xb942:
613		switch (rev) {
614		case 0:
615			/* No support for ES1.0 Test chip */
616			BUG();
617		case 1:
618		default:
619			omap_revision = OMAP5430_REV_ES2_0;
 
 
 
 
 
 
620		}
621		break;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
622
623	case 0xb998:
624		switch (rev) {
625		case 0:
626			/* No support for ES1.0 Test chip */
627			BUG();
628		case 1:
 
 
 
 
629		default:
630			omap_revision = OMAP5432_REV_ES2_0;
 
631		}
632		break;
633
634	default:
635		/* Unknown default to latest silicon rev as default*/
636		omap_revision = OMAP5430_REV_ES2_0;
637	}
638
639	sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
640	sprintf(soc_rev, "ES%d.0", (omap_rev() >> 12) & 0xf);
641
642	pr_info("%s %s\n", soc_name, soc_rev);
643}
644
645void __init dra7xxx_check_revision(void)
646{
647	u32 idcode;
648	u16 hawkeye;
649	u8 rev, package;
650	struct omap_die_id odi;
651
652	omap_get_die_id(&odi);
653	package = (odi.id_2 >> 16) & 0x3;
654	idcode = read_tap_reg(OMAP_TAP_IDCODE);
655	hawkeye = (idcode >> 12) & 0xffff;
656	rev = (idcode >> 28) & 0xff;
657	switch (hawkeye) {
658	case 0xbb50:
659		switch (rev) {
660		case 0:
661		default:
662			switch (package) {
663			case 0x2:
664				omap_revision = DRA762_ABZ_REV_ES1_0;
665				break;
666			case 0x3:
667				omap_revision = DRA762_ACD_REV_ES1_0;
668				break;
669			default:
670				omap_revision = DRA762_REV_ES1_0;
671				break;
672			}
673			break;
 
 
 
 
 
674		}
675		break;
676
677	case 0xb990:
678		switch (rev) {
679		case 0:
680			omap_revision = DRA752_REV_ES1_0;
681			break;
682		case 1:
683			omap_revision = DRA752_REV_ES1_1;
684			break;
685		case 2:
686		default:
687			omap_revision = DRA752_REV_ES2_0;
688			break;
689		}
690		break;
691
692	case 0xb9bc:
693		switch (rev) {
694		case 0:
695			omap_revision = DRA722_REV_ES1_0;
696			break;
697		case 1:
698			omap_revision = DRA722_REV_ES2_0;
699			break;
700		case 2:
 
701		default:
702			omap_revision = DRA722_REV_ES2_1;
703			break;
704		}
705		break;
706
707	default:
708		/* Unknown default to latest silicon rev as default*/
709		pr_warn("%s: unknown idcode=0x%08x (hawkeye=0x%08x,rev=0x%x)\n",
710			__func__, idcode, hawkeye, rev);
711		omap_revision = DRA752_REV_ES2_0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
712	}
713
714	sprintf(soc_name, "DRA%03x", omap_rev() >> 16);
715	sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
716		(omap_rev() >> 8) & 0xf);
 
 
 
 
 
 
 
 
 
 
717
718	pr_info("%s %s\n", soc_name, soc_rev);
719}
720
721/*
722 * Set up things for map_io and processor detection later on. Gets called
723 * pretty much first thing from board init. For multi-omap, this gets
724 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
725 * detect the exact revision later on in omap2_detect_revision() once map_io
726 * is done.
727 */
728void __init omap2_set_globals_tap(u32 class, void __iomem *tap)
729{
730	omap_revision = class;
731	tap_base = tap;
732
733	/* XXX What is this intended to do? */
734	if (soc_is_omap34xx())
735		tap_prod_id = 0x0210;
736	else
737		tap_prod_id = 0x0208;
738}
739
740#ifdef CONFIG_SOC_BUS
741
742static const char * const omap_types[] = {
743	[OMAP2_DEVICE_TYPE_TEST]	= "TST",
744	[OMAP2_DEVICE_TYPE_EMU]		= "EMU",
745	[OMAP2_DEVICE_TYPE_SEC]		= "HS",
746	[OMAP2_DEVICE_TYPE_GP]		= "GP",
747	[OMAP2_DEVICE_TYPE_BAD]		= "BAD",
748};
749
750static const char * __init omap_get_family(void)
751{
752	if (soc_is_omap24xx())
753		return kasprintf(GFP_KERNEL, "OMAP2");
754	else if (soc_is_omap34xx())
755		return kasprintf(GFP_KERNEL, "OMAP3");
756	else if (soc_is_omap44xx())
757		return kasprintf(GFP_KERNEL, "OMAP4");
758	else if (soc_is_omap54xx())
759		return kasprintf(GFP_KERNEL, "OMAP5");
760	else if (soc_is_am33xx() || soc_is_am335x())
761		return kasprintf(GFP_KERNEL, "AM33xx");
762	else if (soc_is_am43xx())
763		return kasprintf(GFP_KERNEL, "AM43xx");
764	else if (soc_is_dra7xx())
765		return kasprintf(GFP_KERNEL, "DRA7");
766	else
767		return kasprintf(GFP_KERNEL, "Unknown");
768}
769
770static ssize_t
771type_show(struct device *dev, struct device_attribute *attr, char *buf)
772{
773	return sprintf(buf, "%s\n", omap_types[omap_type()]);
774}
775
776static DEVICE_ATTR_RO(type);
777
778static struct attribute *omap_soc_attrs[] = {
779	&dev_attr_type.attr,
780	NULL
781};
782
783ATTRIBUTE_GROUPS(omap_soc);
784
785void __init omap_soc_device_init(void)
786{
787	struct soc_device *soc_dev;
788	struct soc_device_attribute *soc_dev_attr;
789
790	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
791	if (!soc_dev_attr)
792		return;
793
794	soc_dev_attr->machine  = soc_name;
795	soc_dev_attr->family   = omap_get_family();
796	if (!soc_dev_attr->family) {
797		kfree(soc_dev_attr);
798		return;
799	}
800	soc_dev_attr->revision = soc_rev;
801	soc_dev_attr->custom_attr_group = omap_soc_groups[0];
802
803	soc_dev = soc_device_register(soc_dev_attr);
804	if (IS_ERR(soc_dev)) {
805		kfree(soc_dev_attr->family);
806		kfree(soc_dev_attr);
807		return;
808	}
809}
810#endif /* CONFIG_SOC_BUS */
v3.1
 
  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}