/* * linux/arch/arm/mach-omap2/id.c * * OMAP2 CPU identification code * * Copyright (C) 2005 Nokia Corporation * Written by Tony Lindgren * * Copyright (C) 2009-11 Texas Instruments * Added OMAP4 support - Santosh Shilimkar * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include "control.h" static struct omap_chip_id omap_chip; static unsigned int omap_revision; u32 omap3_features; unsigned int omap_rev(void) { return omap_revision; } EXPORT_SYMBOL(omap_rev); /** * omap_chip_is - test whether currently running OMAP matches a chip type * @oc: omap_chip_t to test against * * Test whether the currently-running OMAP chip matches the supplied * chip type 'oc'. Returns 1 upon a match; 0 upon failure. */ int omap_chip_is(struct omap_chip_id oci) { return (oci.oc & omap_chip.oc) ? 1 : 0; } EXPORT_SYMBOL(omap_chip_is); int omap_type(void) { u32 val = 0; if (cpu_is_omap24xx()) { val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS); } else if (cpu_is_omap34xx()) { val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS); } else if (cpu_is_omap44xx()) { val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS); } else { pr_err("Cannot detect omap type!\n"); goto out; } val &= OMAP2_DEVICETYPE_MASK; val >>= 8; out: return val; } EXPORT_SYMBOL(omap_type); /*----------------------------------------------------------------------------*/ #define OMAP_TAP_IDCODE 0x0204 #define OMAP_TAP_DIE_ID_0 0x0218 #define OMAP_TAP_DIE_ID_1 0x021C #define OMAP_TAP_DIE_ID_2 0x0220 #define OMAP_TAP_DIE_ID_3 0x0224 #define OMAP_TAP_DIE_ID_44XX_0 0x0200 #define OMAP_TAP_DIE_ID_44XX_1 0x0208 #define OMAP_TAP_DIE_ID_44XX_2 0x020c #define OMAP_TAP_DIE_ID_44XX_3 0x0210 #define read_tap_reg(reg) __raw_readl(tap_base + (reg)) struct omap_id { u16 hawkeye; /* Silicon type (Hawkeye id) */ u8 dev; /* Device type from production_id reg */ u32 type; /* Combined type id copied to omap_revision */ }; /* Register values to detect the OMAP version */ static struct omap_id omap_ids[] __initdata = { { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200024 }, { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201024 }, { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202024 }, { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220024 }, { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230024 }, { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300024 }, }; static void __iomem *tap_base; static u16 tap_prod_id; void omap_get_die_id(struct omap_die_id *odi) { if (cpu_is_omap44xx()) { odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_0); odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_1); odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_2); odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_44XX_3); return; } odi->id_0 = read_tap_reg(OMAP_TAP_DIE_ID_0); odi->id_1 = read_tap_reg(OMAP_TAP_DIE_ID_1); odi->id_2 = read_tap_reg(OMAP_TAP_DIE_ID_2); odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3); } static void __init omap24xx_check_revision(void) { int i, j; u32 idcode, prod_id; u16 hawkeye; u8 dev_type, rev; struct omap_die_id odi; idcode = read_tap_reg(OMAP_TAP_IDCODE); prod_id = read_tap_reg(tap_prod_id); hawkeye = (idcode >> 12) & 0xffff; rev = (idcode >> 28) & 0x0f; dev_type = (prod_id >> 16) & 0x0f; omap_get_die_id(&odi); pr_debug("OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n", idcode, rev, hawkeye, (idcode >> 1) & 0x7ff); pr_debug("OMAP_TAP_DIE_ID_0: 0x%08x\n", odi.id_0); pr_debug("OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n", odi.id_1, (odi.id_1 >> 28) & 0xf); pr_debug("OMAP_TAP_DIE_ID_2: 0x%08x\n", odi.id_2); pr_debug("OMAP_TAP_DIE_ID_3: 0x%08x\n", odi.id_3); pr_debug("OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n", prod_id, dev_type); /* Check hawkeye ids */ for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { if (hawkeye == omap_ids[i].hawkeye) break; } if (i == ARRAY_SIZE(omap_ids)) { printk(KERN_ERR "Unknown OMAP CPU id\n"); return; } for (j = i; j < ARRAY_SIZE(omap_ids); j++) { if (dev_type == omap_ids[j].dev) break; } if (j == ARRAY_SIZE(omap_ids)) { printk(KERN_ERR "Unknown OMAP device type. " "Handling it as OMAP%04x\n", omap_ids[i].type >> 16); j = i; } pr_info("OMAP%04x", omap_rev() >> 16); if ((omap_rev() >> 8) & 0x0f) pr_info("ES%x", (omap_rev() >> 12) & 0xf); pr_info("\n"); } #define OMAP3_CHECK_FEATURE(status,feat) \ if (((status & OMAP3_ ##feat## _MASK) \ >> OMAP3_ ##feat## _SHIFT) != FEAT_ ##feat## _NONE) { \ omap3_features |= OMAP3_HAS_ ##feat; \ } static void __init omap3_check_features(void) { u32 status; omap3_features = 0; status = omap_ctrl_readl(OMAP3_CONTROL_OMAP_STATUS); OMAP3_CHECK_FEATURE(status, L2CACHE); OMAP3_CHECK_FEATURE(status, IVA); OMAP3_CHECK_FEATURE(status, SGX); OMAP3_CHECK_FEATURE(status, NEON); OMAP3_CHECK_FEATURE(status, ISP); if (cpu_is_omap3630()) omap3_features |= OMAP3_HAS_192MHZ_CLK; if (!cpu_is_omap3505() && !cpu_is_omap3517()) omap3_features |= OMAP3_HAS_IO_WAKEUP; omap3_features |= OMAP3_HAS_SDRC; /* * TODO: Get additional info (where applicable) * e.g. Size of L2 cache. */ } static void __init ti816x_check_features(void) { omap3_features = OMAP3_HAS_NEON; } static void __init omap3_check_revision(void) { u32 cpuid, idcode; u16 hawkeye; u8 rev; omap_chip.oc = CHIP_IS_OMAP3430; /* * We cannot access revision registers on ES1.0. * If the processor type is Cortex-A8 and the revision is 0x0 * it means its Cortex r0p0 which is 3430 ES1.0. */ cpuid = read_cpuid(CPUID_ID); if ((((cpuid >> 4) & 0xfff) == 0xc08) && ((cpuid & 0xf) == 0x0)) { omap_revision = OMAP3430_REV_ES1_0; omap_chip.oc |= CHIP_IS_OMAP3430ES1; return; } /* * Detection for 34xx ES2.0 and above can be done with just * hawkeye and rev. See TRM 1.5.2 Device Identification. * Note that rev does not map directly to our defined processor * revision numbers as ES1.0 uses value 0. */ idcode = read_tap_reg(OMAP_TAP_IDCODE); hawkeye = (idcode >> 12) & 0xffff; rev = (idcode >> 28) & 0xff; switch (hawkeye) { case 0xb7ae: /* Handle 34xx/35xx devices */ switch (rev) { case 0: /* Take care of early samples */ case 1: omap_revision = OMAP3430_REV_ES2_0; omap_chip.oc |= CHIP_IS_OMAP3430ES2; break; case 2: omap_revision = OMAP3430_REV_ES2_1; omap_chip.oc |= CHIP_IS_OMAP3430ES2; break; case 3: omap_revision = OMAP3430_REV_ES3_0; omap_chip.oc |= CHIP_IS_OMAP3430ES3_0; break; case 4: omap_revision = OMAP3430_REV_ES3_1; omap_chip.oc |= CHIP_IS_OMAP3430ES3_1; break; case 7: /* FALLTHROUGH */ default: /* Use the latest known revision as default */ omap_revision = OMAP3430_REV_ES3_1_2; /* REVISIT: Add CHIP_IS_OMAP3430ES3_1_2? */ omap_chip.oc |= CHIP_IS_OMAP3430ES3_1; } break; case 0xb868: /* Handle OMAP35xx/AM35xx devices * * Set the device to be OMAP3505 here. Actual device * is identified later based on the features. * * REVISIT: AM3505/AM3517 should have their own CHIP_IS */ omap_revision = OMAP3505_REV(rev); omap_chip.oc |= CHIP_IS_OMAP3430ES3_1; break; case 0xb891: /* Handle 36xx devices */ omap_chip.oc |= CHIP_IS_OMAP3630ES1; switch(rev) { case 0: /* Take care of early samples */ omap_revision = OMAP3630_REV_ES1_0; break; case 1: omap_revision = OMAP3630_REV_ES1_1; omap_chip.oc |= CHIP_IS_OMAP3630ES1_1; break; case 2: default: omap_revision = OMAP3630_REV_ES1_2; omap_chip.oc |= CHIP_IS_OMAP3630ES1_2; } break; case 0xb81e: omap_chip.oc = CHIP_IS_TI816X; switch (rev) { case 0: omap_revision = TI8168_REV_ES1_0; break; case 1: omap_revision = TI8168_REV_ES1_1; break; default: omap_revision = TI8168_REV_ES1_1; } break; default: /* Unknown default to latest silicon rev as default*/ omap_revision = OMAP3630_REV_ES1_2; omap_chip.oc |= CHIP_IS_OMAP3630ES1_2; } } static void __init omap4_check_revision(void) { u32 idcode; u16 hawkeye; u8 rev; /* * The IC rev detection is done with hawkeye and rev. * Note that rev does not map directly to defined processor * revision numbers as ES1.0 uses value 0. */ idcode = read_tap_reg(OMAP_TAP_IDCODE); hawkeye = (idcode >> 12) & 0xffff; rev = (idcode >> 28) & 0xf; /* * Few initial 4430 ES2.0 samples IDCODE is same as ES1.0 * Use ARM register to detect the correct ES version */ if (!rev && (hawkeye != 0xb94e)) { idcode = read_cpuid(CPUID_ID); rev = (idcode & 0xf) - 1; } switch (hawkeye) { case 0xb852: switch (rev) { case 0: omap_revision = OMAP4430_REV_ES1_0; omap_chip.oc |= CHIP_IS_OMAP4430ES1; break; case 1: default: omap_revision = OMAP4430_REV_ES2_0; omap_chip.oc |= CHIP_IS_OMAP4430ES2; } break; case 0xb95c: switch (rev) { case 3: omap_revision = OMAP4430_REV_ES2_1; omap_chip.oc |= CHIP_IS_OMAP4430ES2_1; break; case 4: default: omap_revision = OMAP4430_REV_ES2_2; omap_chip.oc |= CHIP_IS_OMAP4430ES2_2; } break; case 0xb94e: switch (rev) { case 0: default: omap_revision = OMAP4460_REV_ES1_0; omap_chip.oc |= CHIP_IS_OMAP4460ES1_0; break; } break; default: /* Unknown default to latest silicon rev as default */ omap_revision = OMAP4430_REV_ES2_2; omap_chip.oc |= CHIP_IS_OMAP4430ES2_2; } pr_info("OMAP%04x ES%d.%d\n", omap_rev() >> 16, ((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf)); } #define OMAP3_SHOW_FEATURE(feat) \ if (omap3_has_ ##feat()) \ printk(#feat" "); static void __init omap3_cpuinfo(void) { u8 rev = GET_OMAP_REVISION(); char cpu_name[16], cpu_rev[16]; /* OMAP3430 and OMAP3530 are assumed to be same. * * OMAP3525, OMAP3515 and OMAP3503 can be detected only based * on available features. Upon detection, update the CPU id * and CPU class bits. */ if (cpu_is_omap3630()) { strcpy(cpu_name, "OMAP3630"); } else if (cpu_is_omap3505()) { /* * AM35xx devices */ if (omap3_has_sgx()) { omap_revision = OMAP3517_REV(rev); strcpy(cpu_name, "AM3517"); } else { /* Already set in omap3_check_revision() */ strcpy(cpu_name, "AM3505"); } } else if (cpu_is_ti816x()) { strcpy(cpu_name, "TI816X"); } else if (omap3_has_iva() && omap3_has_sgx()) { /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */ strcpy(cpu_name, "OMAP3430/3530"); } else if (omap3_has_iva()) { omap_revision = OMAP3525_REV(rev); strcpy(cpu_name, "OMAP3525"); } else if (omap3_has_sgx()) { omap_revision = OMAP3515_REV(rev); strcpy(cpu_name, "OMAP3515"); } else { omap_revision = OMAP3503_REV(rev); strcpy(cpu_name, "OMAP3503"); } if (cpu_is_omap3630() || cpu_is_ti816x()) { switch (rev) { case OMAP_REVBITS_00: strcpy(cpu_rev, "1.0"); break; case OMAP_REVBITS_01: strcpy(cpu_rev, "1.1"); break; case OMAP_REVBITS_02: /* FALLTHROUGH */ default: /* Use the latest known revision as default */ strcpy(cpu_rev, "1.2"); } } else if (cpu_is_omap3505() || cpu_is_omap3517()) { switch (rev) { case OMAP_REVBITS_00: strcpy(cpu_rev, "1.0"); break; case OMAP_REVBITS_01: /* FALLTHROUGH */ default: /* Use the latest known revision as default */ strcpy(cpu_rev, "1.1"); } } else { switch (rev) { case OMAP_REVBITS_00: strcpy(cpu_rev, "1.0"); break; case OMAP_REVBITS_01: strcpy(cpu_rev, "2.0"); break; case OMAP_REVBITS_02: strcpy(cpu_rev, "2.1"); break; case OMAP_REVBITS_03: strcpy(cpu_rev, "3.0"); break; case OMAP_REVBITS_04: strcpy(cpu_rev, "3.1"); break; case OMAP_REVBITS_05: /* FALLTHROUGH */ default: /* Use the latest known revision as default */ strcpy(cpu_rev, "3.1.2"); } } /* Print verbose information */ pr_info("%s ES%s (", cpu_name, cpu_rev); OMAP3_SHOW_FEATURE(l2cache); OMAP3_SHOW_FEATURE(iva); OMAP3_SHOW_FEATURE(sgx); OMAP3_SHOW_FEATURE(neon); OMAP3_SHOW_FEATURE(isp); OMAP3_SHOW_FEATURE(192mhz_clk); printk(")\n"); } /* * Try to detect the exact revision of the omap we're running on */ void __init omap2_check_revision(void) { /* * At this point we have an idea about the processor revision set * earlier with omap2_set_globals_tap(). */ if (cpu_is_omap24xx()) { omap24xx_check_revision(); } else if (cpu_is_omap34xx()) { omap3_check_revision(); /* TI816X doesn't have feature register */ if (!cpu_is_ti816x()) omap3_check_features(); else ti816x_check_features(); omap3_cpuinfo(); return; } else if (cpu_is_omap44xx()) { omap4_check_revision(); return; } else { pr_err("OMAP revision unknown, please fix!\n"); } /* * OK, now we know the exact revision. Initialize omap_chip bits * for powerdowmain and clockdomain code. */ if (cpu_is_omap243x()) { /* Currently only supports 2430ES2.1 and 2430-all */ omap_chip.oc |= CHIP_IS_OMAP2430; return; } else if (cpu_is_omap242x()) { /* Currently only supports 2420ES2.1.1 and 2420-all */ omap_chip.oc |= CHIP_IS_OMAP2420; return; } pr_err("Uninitialized omap_chip, please fix!\n"); } /* * Set up things for map_io and processor detection later on. Gets called * pretty much first thing from board init. For multi-omap, this gets * cpu_is_omapxxxx() working accurately enough for map_io. Then we'll try to * detect the exact revision later on in omap2_detect_revision() once map_io * is done. */ void __init omap2_set_globals_tap(struct omap_globals *omap2_globals) { omap_revision = omap2_globals->class; tap_base = omap2_globals->tap; if (cpu_is_omap34xx()) tap_prod_id = 0x0210; else tap_prod_id = 0x0208; }