[deliverable/linux.git] / 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)
{
	WARN_ON_ONCE(!omap_revision || omap_revision == -1);
	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);
	}

	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);
}
Commit	Line	Data
f577ffd7 TL	1	/*
	2	* linux/arch/arm/mach-omap1/id.c
	3	*
	4	* OMAP1 CPU identification code
	5	*
	6	* Copyright (C) 2004 Nokia Corporation
	7	* Written by Tony Lindgren <tony@atomide.com>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*/
	13
f577ffd7 TL	14	#include <linux/module.h>
	15	#include <linux/kernel.h>
	16	#include <linux/init.h>
fced80c7	17	#include <linux/io.h>
9f97da78	18	#include <asm/system_info.h>
2e3ee9f4	19
e4c060db	20	#include "soc.h"
f577ffd7	21
2c799cef TL	22	#include <mach/hardware.h>
2c799cef TL	23
e2ed89fc PW	24	#include "common.h"
e2ed89fc PW	25
3179a019 TL	26	#define OMAP_DIE_ID_0 0xfffe1800
	27	#define OMAP_DIE_ID_1 0xfffe1804
	28	#define OMAP_PRODUCTION_ID_0 0xfffe2000
	29	#define OMAP_PRODUCTION_ID_1 0xfffe2004
	30	#define OMAP32_ID_0 0xfffed400
	31	#define OMAP32_ID_1 0xfffed404
	32
f577ffd7 TL	33	struct omap_id {
	34	u16 jtag_id; /* Used to determine OMAP type */
	35	u8 die_rev; /* Processor revision */
	36	u32 omap_id; /* OMAP revision */
	37	u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
	38	};
	39
84a34344 LL	40	static unsigned int omap_revision;
84a34344 LL	41
f577ffd7 TL	42	/* Register values to detect the OMAP version */
f577ffd7 TL	43	static struct omap_id omap_ids[] __initdata = {
3179a019	44	{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
f577ffd7 TL	45	{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
f577ffd7 TL	46	{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
f5ee2fc7	47	{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
f577ffd7 TL	48	{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
	49	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
	50	{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
	51	{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
	52	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
	53	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	54	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	55	{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
	56	{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
	57	{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
	58	{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
	59	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
	60	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
	61	{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
	62	{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
	63	{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
	64	};
	65
84a34344 LL	66	unsigned int omap_rev(void)
84a34344 LL	67	{
571afb4c	68	WARN_ON_ONCE(!omap_revision \|\| omap_revision == -1);
84a34344 LL	69	return omap_revision;
	70	}
	71	EXPORT_SYMBOL(omap_rev);
	72
f577ffd7 TL	73	/*
	74	* Get OMAP type from PROD_ID.
	75	* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
	76	* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
	77	* Undocumented register in TEST BLOCK is used as fallback; This seems to
	78	* work on 1510, 1610 & 1710. The official way hopefully will work in future
	79	* processors.
	80	*/
	81	static u16 __init omap_get_jtag_id(void)
	82	{
	83	u32 prod_id, omap_id;
	84
	85	prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
	86	omap_id = omap_readl(OMAP32_ID_1);
	87
ae302f40	88	/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
f577ffd7 TL	89	if (((prod_id >> 20) == 0) \|\| (prod_id == omap_id))
	90	prod_id = 0;
	91	else
	92	prod_id &= 0xffff;
	93
	94	if (prod_id)
	95	return prod_id;
	96
	97	/* Use OMAP32_ID_1 as fallback */
	98	prod_id = ((omap_id >> 12) & 0xffff);
	99
	100	return prod_id;
	101	}
	102
	103	/*
	104	* Get OMAP revision from DIE_REV.
	105	* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
	106	* Undocumented register in the TEST BLOCK is used as fallback.
	107	* REVISIT: This does not seem to work on 1510
	108	*/
	109	static u8 __init omap_get_die_rev(void)
	110	{
	111	u32 die_rev;
	112
	113	die_rev = omap_readl(OMAP_DIE_ID_1);
	114
	115	/* Check for broken OMAP_DIE_ID on early 1710 */
	116	if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
	117	die_rev = 0;
	118
	119	die_rev = (die_rev >> 17) & 0xf;
	120	if (die_rev)
	121	return die_rev;
	122
	123	die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
	124
	125	return die_rev;
	126	}
	127
	128	void __init omap_check_revision(void)
	129	{
	130	int i;
	131	u16 jtag_id;
	132	u8 die_rev;
	133	u32 omap_id;
	134	u8 cpu_type;
	135
	136	jtag_id = omap_get_jtag_id();
	137	die_rev = omap_get_die_rev();
	138	omap_id = omap_readl(OMAP32_ID_0);
	139
	140	#ifdef DEBUG
84a34344 LL	141	printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
84a34344 LL	142	printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
f577ffd7 TL	143	omap_readl(OMAP_DIE_ID_1),
f577ffd7 TL	144	(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
84a34344 LL	145	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
	146	omap_readl(OMAP_PRODUCTION_ID_0));
	147	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
f577ffd7 TL	148	omap_readl(OMAP_PRODUCTION_ID_1),
f577ffd7 TL	149	omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
84a34344 LL	150	printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
	151	printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
	152	printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
f577ffd7 TL	153	#endif
	154
	155	system_serial_high = omap_readl(OMAP_DIE_ID_0);
	156	system_serial_low = omap_readl(OMAP_DIE_ID_1);
	157
	158	/* First check only the major version in a safe way */
	159	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	160	if (jtag_id == (omap_ids[i].jtag_id)) {
84a34344	161	omap_revision = omap_ids[i].type;
f577ffd7 TL	162	break;
	163	}
	164	}
	165
	166	/* Check if we can find the die revision */
	167	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	168	if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
84a34344	169	omap_revision = omap_ids[i].type;
f577ffd7 TL	170	break;
	171	}
	172	}
	173
	174	/* Finally check also the omap_id */
	175	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	176	if (jtag_id == omap_ids[i].jtag_id
	177	&& die_rev == omap_ids[i].die_rev
	178	&& omap_id == omap_ids[i].omap_id) {
84a34344	179	omap_revision = omap_ids[i].type;
f577ffd7 TL	180	break;
	181	}
	182	}
	183
	184	/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
84a34344	185	cpu_type = omap_revision >> 24;
f577ffd7 TL	186
	187	switch (cpu_type) {
	188	case 0x07:
ae302f40	189	case 0x08:
84a34344	190	omap_revision \|= 0x07;
f577ffd7	191	break;
3179a019	192	case 0x03:
f577ffd7	193	case 0x15:
84a34344	194	omap_revision \|= 0x15;
f577ffd7 TL	195	break;
	196	case 0x16:
	197	case 0x17:
84a34344	198	omap_revision \|= 0x16;
f577ffd7	199	break;
f577ffd7	200	default:
84a34344	201	printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
f577ffd7 TL	202	}
f577ffd7 TL	203
84a34344 LL	204	printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
	205	if ((omap_revision >> 8) & 0xff)
	206	printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
	207	printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
	208	die_rev, omap_revision & 0xff, system_serial_low,
f577ffd7 TL	209	system_serial_high);
	210	}
	211