207 lines
6.2 KiB
C
207 lines
6.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* linux/arch/arm/mach-omap1/id.c
|
||
|
|
*
|
||
|
|
* OMAP1 CPU identification code
|
||
|
|
*
|
||
|
|
* Copyright (C) 2004 Nokia Corporation
|
||
|
|
* Written by Tony Lindgren <tony@atomide.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/soc/ti/omap1-io.h>
|
||
|
|
#include <asm/system_info.h>
|
||
|
|
|
||
|
|
#include "soc.h"
|
||
|
|
#include "hardware.h"
|
||
|
|
#include "common.h"
|
||
|
|
|
||
|
|
#define OMAP_DIE_ID_0 0xfffe1800
|
||
|
|
#define OMAP_DIE_ID_1 0xfffe1804
|
||
|
|
#define OMAP_PRODUCTION_ID_0 0xfffe2000
|
||
|
|
#define OMAP_PRODUCTION_ID_1 0xfffe2004
|
||
|
|
#define OMAP32_ID_0 0xfffed400
|
||
|
|
#define OMAP32_ID_1 0xfffed404
|
||
|
|
|
||
|
|
struct omap_id {
|
||
|
|
u16 jtag_id; /* Used to determine OMAP type */
|
||
|
|
u8 die_rev; /* Processor revision */
|
||
|
|
u32 omap_id; /* OMAP revision */
|
||
|
|
u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
|
||
|
|
};
|
||
|
|
|
||
|
|
static unsigned int omap_revision;
|
||
|
|
|
||
|
|
/* Register values to detect the OMAP version */
|
||
|
|
static struct omap_id omap_ids[] __initdata = {
|
||
|
|
{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
|
||
|
|
{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
|
||
|
|
{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
|
||
|
|
{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
|
||
|
|
{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
|
||
|
|
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
|
||
|
|
{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
|
||
|
|
{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
|
||
|
|
{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
|
||
|
|
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
|
||
|
|
{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
|
||
|
|
{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
|
||
|
|
{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
|
||
|
|
{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
|
||
|
|
{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
|
||
|
|
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
|
||
|
|
{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
|
||
|
|
{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
|
||
|
|
{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
|
||
|
|
{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
|
||
|
|
};
|
||
|
|
|
||
|
|
unsigned int omap_rev(void)
|
||
|
|
{
|
||
|
|
return omap_revision;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(omap_rev);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get OMAP type from PROD_ID.
|
||
|
|
* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
|
||
|
|
* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
|
||
|
|
* Undocumented register in TEST BLOCK is used as fallback; This seems to
|
||
|
|
* work on 1510, 1610 & 1710. The official way hopefully will work in future
|
||
|
|
* processors.
|
||
|
|
*/
|
||
|
|
static u16 __init omap_get_jtag_id(void)
|
||
|
|
{
|
||
|
|
u32 prod_id, omap_id;
|
||
|
|
|
||
|
|
prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
|
||
|
|
omap_id = omap_readl(OMAP32_ID_1);
|
||
|
|
|
||
|
|
/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
|
||
|
|
if (((prod_id >> 20) == 0) || (prod_id == omap_id))
|
||
|
|
prod_id = 0;
|
||
|
|
else
|
||
|
|
prod_id &= 0xffff;
|
||
|
|
|
||
|
|
if (prod_id)
|
||
|
|
return prod_id;
|
||
|
|
|
||
|
|
/* Use OMAP32_ID_1 as fallback */
|
||
|
|
prod_id = ((omap_id >> 12) & 0xffff);
|
||
|
|
|
||
|
|
return prod_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get OMAP revision from DIE_REV.
|
||
|
|
* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
|
||
|
|
* Undocumented register in the TEST BLOCK is used as fallback.
|
||
|
|
* REVISIT: This does not seem to work on 1510
|
||
|
|
*/
|
||
|
|
static u8 __init omap_get_die_rev(void)
|
||
|
|
{
|
||
|
|
u32 die_rev;
|
||
|
|
|
||
|
|
die_rev = omap_readl(OMAP_DIE_ID_1);
|
||
|
|
|
||
|
|
/* Check for broken OMAP_DIE_ID on early 1710 */
|
||
|
|
if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
|
||
|
|
die_rev = 0;
|
||
|
|
|
||
|
|
die_rev = (die_rev >> 17) & 0xf;
|
||
|
|
if (die_rev)
|
||
|
|
return die_rev;
|
||
|
|
|
||
|
|
die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
|
||
|
|
|
||
|
|
return die_rev;
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init omap_check_revision(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
u16 jtag_id;
|
||
|
|
u8 die_rev;
|
||
|
|
u32 omap_id;
|
||
|
|
u8 cpu_type;
|
||
|
|
|
||
|
|
jtag_id = omap_get_jtag_id();
|
||
|
|
die_rev = omap_get_die_rev();
|
||
|
|
omap_id = omap_readl(OMAP32_ID_0);
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
|
||
|
|
printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
|
||
|
|
omap_readl(OMAP_DIE_ID_1),
|
||
|
|
(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
|
||
|
|
printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
|
||
|
|
omap_readl(OMAP_PRODUCTION_ID_0));
|
||
|
|
printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
|
||
|
|
omap_readl(OMAP_PRODUCTION_ID_1),
|
||
|
|
omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
|
||
|
|
printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
|
||
|
|
printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
|
||
|
|
printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
system_serial_high = omap_readl(OMAP_DIE_ID_0);
|
||
|
|
system_serial_low = omap_readl(OMAP_DIE_ID_1);
|
||
|
|
|
||
|
|
/* First check only the major version in a safe way */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
|
||
|
|
if (jtag_id == (omap_ids[i].jtag_id)) {
|
||
|
|
omap_revision = omap_ids[i].type;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if we can find the die revision */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
|
||
|
|
if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
|
||
|
|
omap_revision = omap_ids[i].type;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Finally check also the omap_id */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
|
||
|
|
if (jtag_id == omap_ids[i].jtag_id
|
||
|
|
&& die_rev == omap_ids[i].die_rev
|
||
|
|
&& omap_id == omap_ids[i].omap_id) {
|
||
|
|
omap_revision = omap_ids[i].type;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
|
||
|
|
cpu_type = omap_revision >> 24;
|
||
|
|
|
||
|
|
switch (cpu_type) {
|
||
|
|
case 0x07:
|
||
|
|
case 0x08:
|
||
|
|
omap_revision |= 0x07;
|
||
|
|
break;
|
||
|
|
case 0x03:
|
||
|
|
case 0x15:
|
||
|
|
omap_revision |= 0x15;
|
||
|
|
break;
|
||
|
|
case 0x16:
|
||
|
|
case 0x17:
|
||
|
|
omap_revision |= 0x16;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
|
||
|
|
}
|
||
|
|
|
||
|
|
pr_info("OMAP%04x", omap_revision >> 16);
|
||
|
|
if ((omap_revision >> 8) & 0xff)
|
||
|
|
pr_cont("%x", (omap_revision >> 8) & 0xff);
|
||
|
|
pr_cont(" revision %i handled as %02xxx id: %08x%08x\n",
|
||
|
|
die_rev, omap_revision & 0xff, system_serial_low,
|
||
|
|
system_serial_high);
|
||
|
|
}
|
||
|
|
|