[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 <plat/cpu.h>

#include <mach/hardware.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);
	}

	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
ce491cf8	20	#include <plat/cpu.h>
f577ffd7	21
2c799cef TL	22	#include <mach/hardware.h>
2c799cef TL	23
3179a019 TL	24	#define OMAP_DIE_ID_0 0xfffe1800
	25	#define OMAP_DIE_ID_1 0xfffe1804
	26	#define OMAP_PRODUCTION_ID_0 0xfffe2000
	27	#define OMAP_PRODUCTION_ID_1 0xfffe2004
	28	#define OMAP32_ID_0 0xfffed400
	29	#define OMAP32_ID_1 0xfffed404
	30
f577ffd7 TL	31	struct omap_id {
	32	u16 jtag_id; /* Used to determine OMAP type */
	33	u8 die_rev; /* Processor revision */
	34	u32 omap_id; /* OMAP revision */
	35	u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
	36	};
	37
84a34344 LL	38	static unsigned int omap_revision;
84a34344 LL	39
f577ffd7 TL	40	/* Register values to detect the OMAP version */
f577ffd7 TL	41	static struct omap_id omap_ids[] __initdata = {
3179a019	42	{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
f577ffd7 TL	43	{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
f577ffd7 TL	44	{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
f5ee2fc7	45	{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
f577ffd7 TL	46	{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
	47	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
	48	{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
	49	{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
	50	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
	51	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	52	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	53	{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
	54	{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
	55	{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
	56	{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
	57	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
	58	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
	59	{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
	60	{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
	61	{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
	62	};
	63
84a34344 LL	64	unsigned int omap_rev(void)
	65	{
	66	return omap_revision;
	67	}
	68	EXPORT_SYMBOL(omap_rev);
	69
f577ffd7 TL	70	/*
	71	* Get OMAP type from PROD_ID.
	72	* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
	73	* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
	74	* Undocumented register in TEST BLOCK is used as fallback; This seems to
	75	* work on 1510, 1610 & 1710. The official way hopefully will work in future
	76	* processors.
	77	*/
	78	static u16 __init omap_get_jtag_id(void)
	79	{
	80	u32 prod_id, omap_id;
	81
	82	prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
	83	omap_id = omap_readl(OMAP32_ID_1);
	84
ae302f40	85	/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
f577ffd7 TL	86	if (((prod_id >> 20) == 0) \|\| (prod_id == omap_id))
	87	prod_id = 0;
	88	else
	89	prod_id &= 0xffff;
	90
	91	if (prod_id)
	92	return prod_id;
	93
	94	/* Use OMAP32_ID_1 as fallback */
	95	prod_id = ((omap_id >> 12) & 0xffff);
	96
	97	return prod_id;
	98	}
	99
	100	/*
	101	* Get OMAP revision from DIE_REV.
	102	* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
	103	* Undocumented register in the TEST BLOCK is used as fallback.
	104	* REVISIT: This does not seem to work on 1510
	105	*/
	106	static u8 __init omap_get_die_rev(void)
	107	{
	108	u32 die_rev;
	109
	110	die_rev = omap_readl(OMAP_DIE_ID_1);
	111
	112	/* Check for broken OMAP_DIE_ID on early 1710 */
	113	if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
	114	die_rev = 0;
	115
	116	die_rev = (die_rev >> 17) & 0xf;
	117	if (die_rev)
	118	return die_rev;
	119
	120	die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
	121
	122	return die_rev;
	123	}
	124
	125	void __init omap_check_revision(void)
	126	{
	127	int i;
	128	u16 jtag_id;
	129	u8 die_rev;
	130	u32 omap_id;
	131	u8 cpu_type;
	132
	133	jtag_id = omap_get_jtag_id();
	134	die_rev = omap_get_die_rev();
	135	omap_id = omap_readl(OMAP32_ID_0);
	136
	137	#ifdef DEBUG
84a34344 LL	138	printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
84a34344 LL	139	printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
f577ffd7 TL	140	omap_readl(OMAP_DIE_ID_1),
f577ffd7 TL	141	(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
84a34344 LL	142	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
	143	omap_readl(OMAP_PRODUCTION_ID_0));
	144	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
f577ffd7 TL	145	omap_readl(OMAP_PRODUCTION_ID_1),
f577ffd7 TL	146	omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
84a34344 LL	147	printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
	148	printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
	149	printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
f577ffd7 TL	150	#endif
	151
	152	system_serial_high = omap_readl(OMAP_DIE_ID_0);
	153	system_serial_low = omap_readl(OMAP_DIE_ID_1);
	154
	155	/* First check only the major version in a safe way */
	156	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	157	if (jtag_id == (omap_ids[i].jtag_id)) {
84a34344	158	omap_revision = omap_ids[i].type;
f577ffd7 TL	159	break;
	160	}
	161	}
	162
	163	/* Check if we can find the die revision */
	164	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	165	if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
84a34344	166	omap_revision = omap_ids[i].type;
f577ffd7 TL	167	break;
	168	}
	169	}
	170
	171	/* Finally check also the omap_id */
	172	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	173	if (jtag_id == omap_ids[i].jtag_id
	174	&& die_rev == omap_ids[i].die_rev
	175	&& omap_id == omap_ids[i].omap_id) {
84a34344	176	omap_revision = omap_ids[i].type;
f577ffd7 TL	177	break;
	178	}
	179	}
	180
	181	/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
84a34344	182	cpu_type = omap_revision >> 24;
f577ffd7 TL	183
	184	switch (cpu_type) {
	185	case 0x07:
ae302f40	186	case 0x08:
84a34344	187	omap_revision \|= 0x07;
f577ffd7	188	break;
3179a019	189	case 0x03:
f577ffd7	190	case 0x15:
84a34344	191	omap_revision \|= 0x15;
f577ffd7 TL	192	break;
	193	case 0x16:
	194	case 0x17:
84a34344	195	omap_revision \|= 0x16;
f577ffd7	196	break;
f577ffd7	197	default:
84a34344	198	printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
f577ffd7 TL	199	}
f577ffd7 TL	200
84a34344 LL	201	printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
	202	if ((omap_revision >> 8) & 0xff)
	203	printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
	204	printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
	205	die_rev, omap_revision & 0xff, system_serial_low,
f577ffd7 TL	206	system_serial_high);
	207	}
	208