Release 4.11 arch/arm/mach-omap1/id.c
/*
* linux/arch/arm/mach-omap1/id.c
*
* OMAP1 CPU identification code
*
* Copyright (C) 2004 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 <linux/io.h>
#include <asm/system_info.h>
#include "soc.h"
#include <mach/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;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Lauri Leukkunen | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tony Lindgren | 78 | 98.73% | 1 | 50.00% |
| Zebediah C. McClure | 1 | 1.27% | 1 | 50.00% |
| Total | 79 | 100.00% | 2 | 100.00% |
/*
* 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;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tony Lindgren | 72 | 100.00% | 1 | 100.00% |
| Total | 72 | 100.00% | 1 | 100.00% |
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);
}
printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
if ((omap_revision >> 8) & 0xff)
printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
die_rev, omap_revision & 0xff, system_serial_low,
system_serial_high);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tony Lindgren | 388 | 93.95% | 2 | 50.00% |
| Lauri Leukkunen | 22 | 5.33% | 1 | 25.00% |
| Zebediah C. McClure | 3 | 0.73% | 1 | 25.00% |
| Total | 413 | 100.00% | 4 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tony Lindgren | 1029 | 92.95% | 4 | 40.00% |
| Lauri Leukkunen | 45 | 4.07% | 1 | 10.00% |
| Zebediah C. McClure | 24 | 2.17% | 1 | 10.00% |
| Paul Walmsley | 3 | 0.27% | 1 | 10.00% |
| David Howells | 3 | 0.27% | 1 | 10.00% |
| Angelo Arrifano | 2 | 0.18% | 1 | 10.00% |
| Russell King | 1 | 0.09% | 1 | 10.00% |
| Total | 1107 | 100.00% | 10 | 100.00% |
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