6ab3d5624e
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/*
|
|
* linux/arch/arm/mach-omap2/id.c
|
|
*
|
|
* OMAP2 CPU identification code
|
|
*
|
|
* Copyright (C) 2005 Nokia Corporation
|
|
* Written by Tony Lindgren <tony@atomide.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 <asm/io.h>
|
|
|
|
#define OMAP24XX_TAP_BASE io_p2v(0x48014000)
|
|
|
|
#define OMAP_TAP_IDCODE 0x0204
|
|
#define OMAP_TAP_PROD_ID 0x0208
|
|
|
|
#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
|
|
|
|
/* system_rev fields for OMAP2 processors:
|
|
* CPU id bits [31:16],
|
|
* CPU device type [15:12], (unprg,normal,POP)
|
|
* CPU revision [11:08]
|
|
* CPU class bits [07:00]
|
|
*/
|
|
|
|
struct omap_id {
|
|
u16 hawkeye; /* Silicon type (Hawkeye id) */
|
|
u8 dev; /* Device type from production_id reg */
|
|
u32 type; /* combined type id copied to system_rev */
|
|
};
|
|
|
|
/* Register values to detect the OMAP version */
|
|
static struct omap_id omap_ids[] __initdata = {
|
|
{ .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200000 },
|
|
{ .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201000 },
|
|
{ .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202000 },
|
|
{ .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220000 },
|
|
{ .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230000 },
|
|
{ .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300000 },
|
|
};
|
|
|
|
static u32 __init read_tap_reg(int reg)
|
|
{
|
|
return __raw_readl(OMAP24XX_TAP_BASE + reg);
|
|
}
|
|
|
|
void __init omap2_check_revision(void)
|
|
{
|
|
int i, j;
|
|
u32 idcode;
|
|
u32 prod_id;
|
|
u16 hawkeye;
|
|
u8 dev_type;
|
|
u8 rev;
|
|
|
|
idcode = read_tap_reg(OMAP_TAP_IDCODE);
|
|
prod_id = read_tap_reg(OMAP_TAP_PROD_ID);
|
|
hawkeye = (idcode >> 12) & 0xffff;
|
|
rev = (idcode >> 28) & 0x0f;
|
|
dev_type = (prod_id >> 16) & 0x0f;
|
|
|
|
#ifdef DEBUG
|
|
printk(KERN_DEBUG "OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
|
|
idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
|
|
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_0: 0x%08x\n",
|
|
read_tap_reg(OMAP_TAP_DIE_ID_0));
|
|
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
|
|
read_tap_reg(OMAP_TAP_DIE_ID_1),
|
|
(read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
|
|
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_2: 0x%08x\n",
|
|
read_tap_reg(OMAP_TAP_DIE_ID_2));
|
|
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_3: 0x%08x\n",
|
|
read_tap_reg(OMAP_TAP_DIE_ID_3));
|
|
printk(KERN_DEBUG "OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
|
|
prod_id, dev_type);
|
|
#endif
|
|
|
|
/* 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;
|
|
}
|
|
system_rev = omap_ids[j].type;
|
|
|
|
system_rev |= rev << 8;
|
|
|
|
/* Add the cpu class info (24xx) */
|
|
system_rev |= 0x24;
|
|
|
|
pr_info("OMAP%04x", system_rev >> 16);
|
|
if ((system_rev >> 8) & 0x0f)
|
|
printk("%x", (system_rev >> 8) & 0x0f);
|
|
printk("\n");
|
|
}
|
|
|