/*
* 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 <plat/common.h>
#include <plat/cpu.h>
#include <mach/id.h>
#include "control.h"
static unsigned int omap_revision;
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 (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) { \
omap_features |= OMAP3_HAS_ ##feat; \
}
static void __init omap3_check_features(void)
{
u32 status;
omap_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())
omap_features |= OMAP3_HAS_192MHZ_CLK;
if (!cpu_is_omap3505() && !cpu_is_omap3517())
omap_features |= OMAP3_HAS_IO_WAKEUP;
omap_features |= OMAP3_HAS_SDRC;
/*
* TODO: Get additional info (where applicable)
* e.g. Size of L2 cache.
*/
}
static void __init omap4_check_features(void)
{
u32 si_type;
if (cpu_is_omap443x())
omap_features |= OMAP4_HAS_MPU_1GHZ;
if (cpu_is_omap446x()) {
si_type =
read_tap_reg(OMAP4_CTRL_MODULE_CORE_STD_FUSE_PROD_ID_1);
switch ((si_type & (3 << 16)) >> 16) {
case 2:
/* High performance device */
omap_features |= OMAP4_HAS_MPU_1_5GHZ;
break;
case 1:
default:
/* Standard device */
omap_features |= OMAP4_HAS_MPU_1_2GHZ;
break;
}
}
}
static void __init ti816x_check_features(void)
{
omap_features = OMAP3_HAS_NEON;
}
static void __init omap3_check_revision(const char **cpu_rev)
{
u32 cpuid, idcode;
u16 hawkeye;
u8 rev;
/*
* 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;
*cpu_rev = "1.0";
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;
*cpu_rev = "2.0";
break;
case 2:
omap_revision = OMAP3430_REV_ES2_1;
*cpu_rev = "2.1";
break;
case 3:
omap_revision = OMAP3430_REV_ES3_0;
*cpu_rev = "3.0";
break;
case 4:
omap_revision = OMAP3430_REV_ES3_1;
*cpu_rev = "3.1";
break;
case 7:
/* FALLTHROUGH */
default:
/* Use the latest known revision as default */
omap_revision = OMAP3430_REV_ES3_1_2;
*cpu_rev = "3.1.2";
}
break;
case 0xb868:
/*
* Handle OMAP/AM 3505/3517 devices
*
* Set the device to be OMAP3517 here. Actual device
* is identified later based on the features.
*/
switch (rev) {
case 0:
omap_revision = OMAP3517_REV_ES1_0;
*cpu_rev = "1.0";
break;
case 1:
/* FALLTHROUGH */
default:
omap_revision = OMAP3517_REV_ES1_1;
*cpu_rev = "1.1";
}
break;
case 0xb891:
/* Handle 36xx devices */
switch(rev) {
case 0: /* Take care of early samples */
omap_revision = OMAP3630_REV_ES1_0;
*cpu_rev = "1.0";
break;
case 1:
omap_revision = OMAP3630_REV_ES1_1;
*cpu_rev = "1.1";
break;
case 2:
/* FALLTHROUGH */
default:
omap_revision = OMAP3630_REV_ES1_2;
*cpu_rev = "1.2";
}
break;
case 0xb81e:
switch (rev) {
case 0:
omap_revision = TI8168_REV_ES1_0;
*cpu_rev = "1.0";
break;
case 1:
/* FALLTHROUGH */
default:
omap_revision = TI8168_REV_ES1_1;
*cpu_rev = "1.1";
break;
}
break;
default:
/* Unknown default to latest silicon rev as default */
omap_revision = OMAP3630_REV_ES1_2;
*cpu_rev = "1.2";
pr_warn("Warning: unknown chip type; assuming OMAP3630ES1.2\n");
}
}
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;
break;
case 1:
default:
omap_revision = OMAP4430_REV_ES2_0;
}
break;
case 0xb95c:
switch (rev) {
case 3:
omap_revision = OMAP4430_REV_ES2_1;
break;
case 4:
default:
omap_revision = OMAP4430_REV_ES2_2;
}
break;
case 0xb94e:
switch (rev) {
case 0:
default:
omap_revision = OMAP4460_REV_ES1_0;
break;
}
break;
default:
/* Unknown default to latest silicon rev as default */
omap_revision = OMAP4430_REV_ES2_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(const char *cpu_rev)
{
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 (cpu_is_omap3517()) {
/* AM35xx devices */
cpu_name = (omap3_has_sgx()) ? "AM3517" : "AM3505";
} else if (cpu_is_ti816x()) {
cpu_name = "TI816X";
} 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";
} else if (omap3_has_sgx()) {
cpu_name = "OMAP3515";
} else {
cpu_name = "OMAP3503";
}
/* 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)
{
const char *cpu_rev;
/*
* 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(&cpu_rev);
/* TI816X doesn't have feature register */
if (!cpu_is_ti816x())
omap3_check_features();
else
ti816x_check_features();
omap3_cpuinfo(cpu_rev);
return;
} else if (cpu_is_omap44xx()) {
omap4_check_revision();
omap4_check_features();
return;
} else {
pr_err("OMAP revision unknown, 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;
}
