2 * linux/arch/arm/mach-omap2/id.c
4 * OMAP2 CPU identification code
6 * Copyright (C) 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
9 * Copyright (C) 2009-11 Texas Instruments
10 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
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.
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
21 #include <linux/slab.h>
24 #include <linux/sys_soc.h>
27 #include <asm/cputype.h>
36 #define OMAP4_SILICON_TYPE_STANDARD 0x01
37 #define OMAP4_SILICON_TYPE_PERFORMANCE 0x02
39 #define OMAP_SOC_MAX_NAME_LENGTH 16
41 static unsigned int omap_revision;
42 static char soc_name[OMAP_SOC_MAX_NAME_LENGTH];
43 static char soc_rev[OMAP_SOC_MAX_NAME_LENGTH];
46 unsigned int omap_rev(void)
50 EXPORT_SYMBOL(omap_rev);
56 if (cpu_is_omap24xx()) {
57 val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
58 } else if (soc_is_am33xx()) {
59 val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
60 } else if (cpu_is_omap34xx()) {
61 val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
62 } else if (cpu_is_omap44xx()) {
63 val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
64 } else if (soc_is_omap54xx()) {
65 val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
66 val &= OMAP5_DEVICETYPE_MASK;
70 pr_err("Cannot detect omap type!\n");
74 val &= OMAP2_DEVICETYPE_MASK;
80 EXPORT_SYMBOL(omap_type);
83 /*----------------------------------------------------------------------------*/
85 #define OMAP_TAP_IDCODE 0x0204
86 #define OMAP_TAP_DIE_ID_0 0x0218
87 #define OMAP_TAP_DIE_ID_1 0x021C
88 #define OMAP_TAP_DIE_ID_2 0x0220
89 #define OMAP_TAP_DIE_ID_3 0x0224
91 #define OMAP_TAP_DIE_ID_44XX_0 0x0200
92 #define OMAP_TAP_DIE_ID_44XX_1 0x0208
93 #define OMAP_TAP_DIE_ID_44XX_2 0x020c
94 #define OMAP_TAP_DIE_ID_44XX_3 0x0210
96 #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
99 u16 hawkeye; /* Silicon type (Hawkeye id) */
100 u8 dev; /* Device type from production_id reg */
101 u32 type; /* Combined type id copied to omap_revision */
104 /* Register values to detect the OMAP version */
105 static struct omap_id omap_ids[] __initdata = {
106 { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 },
107 { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 },
108 { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 },
109 { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 },
110 { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 },
111 { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 },
114 static void __iomem *tap_base;
115 static u16 tap_prod_id;
117 void omap_get_die_id(struct omap_die_id *odi)
119 if (cpu_is_omap44xx() || soc_is_omap54xx()) {
120 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0);
121 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1);
122 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2);
123 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3);
127 odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0);
128 odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1);
129 odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2);
130 odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
133 void __init omap2xxx_check_revision(void)
139 struct omap_die_id odi;
141 idcode = read_tap_reg(OMAP_TAP_IDCODE);
142 prod_id = read_tap_reg(tap_prod_id);
143 hawkeye = (idcode >> 12) & 0xffff;
144 rev = (idcode >> 28) & 0x0f;
145 dev_type = (prod_id >> 16) & 0x0f;
146 omap_get_die_id(&odi);
148 pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
149 idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
150 pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0);
151 pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
152 odi.id_1, (odi.id_1 >> 28) & 0xf);
153 pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2);
154 pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3);
155 pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
158 /* Check hawkeye ids */
159 for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
160 if (hawkeye == omap_ids[i].hawkeye)
164 if (i == ARRAY_SIZE(omap_ids)) {
165 printk(KERN_ERR "Unknown OMAP CPU id\n");
169 for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
170 if (dev_type == omap_ids[j].dev)
174 if (j == ARRAY_SIZE(omap_ids)) {
175 pr_err("Unknown OMAP device type. Handling it as OMAP%04x\n",
176 omap_ids[i].type >> 16);
180 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
181 sprintf(soc_rev, "ES%x", (omap_rev() >> 12) & 0xf);
183 pr_info("%s", soc_name);
184 if ((omap_rev() >> 8) & 0x0f)
185 pr_info("%s", soc_rev);
189 #define OMAP3_SHOW_FEATURE(feat) \
190 if (omap3_has_ ##feat()) \
193 static void __init omap3_cpuinfo(void)
195 const char *cpu_name;
198 * OMAP3430 and OMAP3530 are assumed to be same.
200 * OMAP3525, OMAP3515 and OMAP3503 can be detected only based
201 * on available features. Upon detection, update the CPU id
202 * and CPU class bits.
204 if (cpu_is_omap3630()) {
205 cpu_name = "OMAP3630";
206 } else if (soc_is_am35xx()) {
207 cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
208 } else if (cpu_is_ti816x()) {
210 } else if (soc_is_am335x()) {
212 } else if (cpu_is_ti814x()) {
214 } else if (omap3_has_iva() && omap3_has_sgx()) {
215 /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
216 cpu_name = "OMAP3430/3530";
217 } else if (omap3_has_iva()) {
218 cpu_name = "OMAP3525";
219 } else if (omap3_has_sgx()) {
220 cpu_name = "OMAP3515";
222 cpu_name = "OMAP3503";
225 sprintf(soc_name, "%s", cpu_name);
227 /* Print verbose information */
228 pr_info("%s %s (", soc_name, soc_rev);
230 OMAP3_SHOW_FEATURE(l2cache);
231 OMAP3_SHOW_FEATURE(iva);
232 OMAP3_SHOW_FEATURE(sgx);
233 OMAP3_SHOW_FEATURE(neon);
234 OMAP3_SHOW_FEATURE(isp);
235 OMAP3_SHOW_FEATURE(192mhz_clk);
240 #define OMAP3_CHECK_FEATURE(status,feat) \
241 if (((status & OMAP3_ ##feat## _MASK) \
242 >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \
243 omap_features |= OMAP3_HAS_ ##feat; \
246 void __init omap3xxx_check_features(void)
252 status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS);
254 OMAP3_CHECK_FEATURE(status, L2CACHE);
255 OMAP3_CHECK_FEATURE(status, IVA);
256 OMAP3_CHECK_FEATURE(status, SGX);
257 OMAP3_CHECK_FEATURE(status, NEON);
258 OMAP3_CHECK_FEATURE(status, ISP);
259 if (cpu_is_omap3630())
260 omap_features |= OMAP3_HAS_192MHZ_CLK;
261 if (cpu_is_omap3430() || cpu_is_omap3630())
262 omap_features |= OMAP3_HAS_IO_WAKEUP;
263 if (cpu_is_omap3630() || omap_rev() == OMAP3430_REV_ES3_1 ||
264 omap_rev() == OMAP3430_REV_ES3_1_2)
265 omap_features |= OMAP3_HAS_IO_CHAIN_CTRL;
267 omap_features |= OMAP3_HAS_SDRC;
271 * - The am35x Chip ID register has bits 12, 7:5, and 3:2 marked as
272 * reserved and therefore return 0 when read. Unfortunately,
273 * OMAP3_CHECK_FEATURE() will interpret some of those zeroes to
274 * mean that a feature is present even though it isn't so clear
275 * the incorrectly set feature bits.
278 omap_features &= ~(OMAP3_HAS_IVA | OMAP3_HAS_ISP);
281 * TODO: Get additional info (where applicable)
282 * e.g. Size of L2 cache.
288 void __init omap4xxx_check_features(void)
293 (read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1) >> 16) & 0x03;
295 if (si_type == OMAP4_SILICON_TYPE_PERFORMANCE)
296 omap_features = OMAP4_HAS_PERF_SILICON;
299 void __init ti81xx_check_features(void)
301 omap_features = OMAP3_HAS_NEON;
305 void __init omap3xxx_check_revision(void)
313 * We cannot access revision registers on ES1.0.
314 * If the processor type is Cortex-A8 and the revision is 0x0
315 * it means its Cortex r0p0 which is 3430 ES1.0.
317 cpuid = read_cpuid(CPUID_ID);
318 if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) {
319 omap_revision = OMAP3430_REV_ES1_0;
325 * Detection for 34xx ES2.0 and above can be done with just
326 * hawkeye and rev. See TRM 1.5.2 Device Identification.
327 * Note that rev does not map directly to our defined processor
328 * revision numbers as ES1.0 uses value 0.
330 idcode = read_tap_reg(OMAP_TAP_IDCODE);
331 hawkeye = (idcode >> 12) & 0xffff;
332 rev = (idcode >> 28) & 0xff;
336 /* Handle 34xx/35xx devices */
338 case 0: /* Take care of early samples */
340 omap_revision = OMAP3430_REV_ES2_0;
344 omap_revision = OMAP3430_REV_ES2_1;
348 omap_revision = OMAP3430_REV_ES3_0;
352 omap_revision = OMAP3430_REV_ES3_1;
358 /* Use the latest known revision as default */
359 omap_revision = OMAP3430_REV_ES3_1_2;
365 * Handle OMAP/AM 3505/3517 devices
367 * Set the device to be OMAP3517 here. Actual device
368 * is identified later based on the features.
372 omap_revision = AM35XX_REV_ES1_0;
378 omap_revision = AM35XX_REV_ES1_1;
383 /* Handle 36xx devices */
386 case 0: /* Take care of early samples */
387 omap_revision = OMAP3630_REV_ES1_0;
391 omap_revision = OMAP3630_REV_ES1_1;
397 omap_revision = OMAP3630_REV_ES1_2;
404 omap_revision = TI8168_REV_ES1_0;
410 omap_revision = TI8168_REV_ES1_1;
418 omap_revision = AM335X_REV_ES1_0;
424 omap_revision = AM335X_REV_ES2_0;
434 omap_revision = TI8148_REV_ES1_0;
438 omap_revision = TI8148_REV_ES2_0;
444 omap_revision = TI8148_REV_ES2_1;
450 /* Unknown default to latest silicon rev as default */
451 omap_revision = OMAP3630_REV_ES1_2;
453 pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
455 sprintf(soc_rev, "ES%s", cpu_rev);
458 void __init omap4xxx_check_revision(void)
465 * The IC rev detection is done with hawkeye and rev.
466 * Note that rev does not map directly to defined processor
467 * revision numbers as ES1.0 uses value 0.
469 idcode = read_tap_reg(OMAP_TAP_IDCODE);
470 hawkeye = (idcode >> 12) & 0xffff;
471 rev = (idcode >> 28) & 0xf;
474 * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0
475 * Use ARM register to detect the correct ES version
477 if (!rev && (hawkeye != 0xb94e) && (hawkeye != 0xb975)) {
478 idcode = read_cpuid(CPUID_ID);
479 rev = (idcode & 0xf) - 1;
486 omap_revision = OMAP4430_REV_ES1_0;
490 omap_revision = OMAP4430_REV_ES2_0;
496 omap_revision = OMAP4430_REV_ES2_1;
499 omap_revision = OMAP4430_REV_ES2_2;
503 omap_revision = OMAP4430_REV_ES2_3;
509 omap_revision = OMAP4460_REV_ES1_0;
513 omap_revision = OMAP4460_REV_ES1_1;
521 omap_revision = OMAP4470_REV_ES1_0;
526 /* Unknown default to latest silicon rev as default */
527 omap_revision = OMAP4430_REV_ES2_3;
530 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
531 sprintf(soc_rev, "ES%d.%d", (omap_rev() >> 12) & 0xf,
532 (omap_rev() >> 8) & 0xf);
533 pr_info("%s %s\n", soc_name, soc_rev);
536 void __init omap5xxx_check_revision(void)
542 idcode = read_tap_reg(OMAP_TAP_IDCODE);
543 hawkeye = (idcode >> 12) & 0xffff;
544 rev = (idcode >> 28) & 0xff;
549 omap_revision = OMAP5430_REV_ES1_0;
553 omap_revision = OMAP5430_REV_ES2_0;
560 omap_revision = OMAP5432_REV_ES1_0;
564 omap_revision = OMAP5432_REV_ES2_0;
569 /* Unknown default to latest silicon rev as default*/
570 omap_revision = OMAP5430_REV_ES2_0;
573 sprintf(soc_name, "OMAP%04x", omap_rev() >> 16);
574 sprintf(soc_rev, "ES%d.0", (omap_rev() >> 12) & 0xf);
576 pr_info("%s %s\n", soc_name, soc_rev);
580 * Set up things for map_io and processor detection later on. Gets called
581 * pretty much first thing from board init. For multi-omap, this gets
582 * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to
583 * detect the exact revision later on in omap2_detect_revision() once map_io
586 void __init omap2_set_globals_tap(u32 class, void __iomem *tap)
588 omap_revision = class;
591 /* XXX What is this intended to do? */
592 if (cpu_is_omap34xx())
593 tap_prod_id = 0x0210;
595 tap_prod_id = 0x0208;
598 #ifdef CONFIG_SOC_BUS
600 static const char const *omap_types[] = {
601 [OMAP2_DEVICE_TYPE_TEST] = "TST",
602 [OMAP2_DEVICE_TYPE_EMU] = "EMU",
603 [OMAP2_DEVICE_TYPE_SEC] = "HS",
604 [OMAP2_DEVICE_TYPE_GP] = "GP",
605 [OMAP2_DEVICE_TYPE_BAD] = "BAD",
608 static const char * __init omap_get_family(void)
610 if (cpu_is_omap24xx())
611 return kasprintf(GFP_KERNEL, "OMAP2");
612 else if (cpu_is_omap34xx())
613 return kasprintf(GFP_KERNEL, "OMAP3");
614 else if (cpu_is_omap44xx())
615 return kasprintf(GFP_KERNEL, "OMAP4");
616 else if (soc_is_omap54xx())
617 return kasprintf(GFP_KERNEL, "OMAP5");
619 return kasprintf(GFP_KERNEL, "Unknown");
622 static ssize_t omap_get_type(struct device *dev,
623 struct device_attribute *attr,
626 return sprintf(buf, "%s\n", omap_types[omap_type()]);
629 static struct device_attribute omap_soc_attr =
630 __ATTR(type, S_IRUGO, omap_get_type, NULL);
632 void __init omap_soc_device_init(void)
634 struct device *parent;
635 struct soc_device *soc_dev;
636 struct soc_device_attribute *soc_dev_attr;
638 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
642 soc_dev_attr->machine = soc_name;
643 soc_dev_attr->family = omap_get_family();
644 soc_dev_attr->revision = soc_rev;
646 soc_dev = soc_device_register(soc_dev_attr);
647 if (IS_ERR_OR_NULL(soc_dev)) {
652 parent = soc_device_to_device(soc_dev);
653 if (!IS_ERR_OR_NULL(parent))
654 device_create_file(parent, &omap_soc_attr);
656 #endif /* CONFIG_SOC_BUS */