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- /*
- * linux/arch/arm/mach-omap2/id.c
- *
- * OMAP2 CPU identification code
- *
- * Copyright (C) 2005 Nokia Corporation
- * Written by Tony Lindgren <tony@atomide.com>
- *
- * Copyright (C) 2009-11 Texas Instruments
- * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
- *
- * 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 <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/io.h>
- #include <asm/cputype.h>
- #include "common.h"
- #include "id.h"
- #include "soc.h"
- #include "control.h"
- #define OMAP4_SILICON_TYPE_STANDARD 0x01
- #define OMAP4_SILICON_TYPE_PERFORMANCE 0x02
- static unsigned int omap_revision;
- static const char *cpu_rev;
- u32 omap_features;
- unsigned int omap_rev(void)
- {
- return omap_revision;
- }
- EXPORT_SYMBOL(omap_rev);
- int omap_type(void)
- {
- u32 val = 0;
- if (cpu_is_omap24xx()) {
- val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
- } else if (soc_is_am33xx()) {
- val = omap_ctrl_readl(AM33XX_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 if (soc_is_omap54xx()) {
- val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
- val &= OMAP5_DEVICETYPE_MASK;
- val >>= 6;
- goto out;
- } 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() || soc_is_omap54xx()) {
- 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);
- }
- void __init omap2xxx_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)) {
- pr_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_SHOW_FEATURE(feat) \
- if (omap3_has_ ##feat()) \
- printk(#feat" ");
- static void __init omap3_cpuinfo(void)
- {
- const char *cpu_name;
- /*
- * 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()) {
- cpu_name = "OMAP3630";
- } else if (soc_is_am35xx()) {
- cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
- } else if (cpu_is_ti816x()) {
- cpu_name = "TI816X";
- } else if (soc_is_am335x()) {
- cpu_name = "AM335X";
- } else if (cpu_is_ti814x()) {
- cpu_name = "TI814X";
- } else if (omap3_has_iva() && omap3_has_sgx()) {
- /* OMAP3430, OMAP3525, OMAP3515, OMAP3503 devices */
- cpu_name = "OMAP3430/3530";
- } else if (omap3_has_iva()) {
- cpu_name = "OMAP3525";
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