[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)
{
	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)
	67	{
	68	return omap_revision;
	69	}
	70	EXPORT_SYMBOL(omap_rev);
	71
f577ffd7 TL	72	/*
	73	* Get OMAP type from PROD_ID.
	74	* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
	75	* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
	76	* Undocumented register in TEST BLOCK is used as fallback; This seems to
	77	* work on 1510, 1610 & 1710. The official way hopefully will work in future
	78	* processors.
	79	*/
	80	static u16 __init omap_get_jtag_id(void)
	81	{
	82	u32 prod_id, omap_id;
	83
	84	prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
	85	omap_id = omap_readl(OMAP32_ID_1);
	86
ae302f40	87	/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
f577ffd7 TL	88	if (((prod_id >> 20) == 0) \|\| (prod_id == omap_id))
	89	prod_id = 0;
	90	else
	91	prod_id &= 0xffff;
	92
	93	if (prod_id)
	94	return prod_id;
	95
	96	/* Use OMAP32_ID_1 as fallback */
	97	prod_id = ((omap_id >> 12) & 0xffff);
	98
	99	return prod_id;
	100	}
	101
	102	/*
	103	* Get OMAP revision from DIE_REV.
	104	* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
	105	* Undocumented register in the TEST BLOCK is used as fallback.
	106	* REVISIT: This does not seem to work on 1510
	107	*/
	108	static u8 __init omap_get_die_rev(void)
	109	{
	110	u32 die_rev;
	111
	112	die_rev = omap_readl(OMAP_DIE_ID_1);
	113
	114	/* Check for broken OMAP_DIE_ID on early 1710 */
	115	if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
	116	die_rev = 0;
	117
	118	die_rev = (die_rev >> 17) & 0xf;
	119	if (die_rev)
	120	return die_rev;
	121
	122	die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
	123
	124	return die_rev;
	125	}
	126
	127	void __init omap_check_revision(void)
	128	{
	129	int i;
	130	u16 jtag_id;
	131	u8 die_rev;
	132	u32 omap_id;
	133	u8 cpu_type;
	134
	135	jtag_id = omap_get_jtag_id();
	136	die_rev = omap_get_die_rev();
	137	omap_id = omap_readl(OMAP32_ID_0);
	138
	139	#ifdef DEBUG
84a34344 LL	140	printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
84a34344 LL	141	printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
f577ffd7 TL	142	omap_readl(OMAP_DIE_ID_1),
f577ffd7 TL	143	(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
84a34344 LL	144	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
	145	omap_readl(OMAP_PRODUCTION_ID_0));
	146	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
f577ffd7 TL	147	omap_readl(OMAP_PRODUCTION_ID_1),
f577ffd7 TL	148	omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
84a34344 LL	149	printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
	150	printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
	151	printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
f577ffd7 TL	152	#endif
	153
	154	system_serial_high = omap_readl(OMAP_DIE_ID_0);
	155	system_serial_low = omap_readl(OMAP_DIE_ID_1);
	156
	157	/* First check only the major version in a safe way */
	158	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	159	if (jtag_id == (omap_ids[i].jtag_id)) {
84a34344	160	omap_revision = omap_ids[i].type;
f577ffd7 TL	161	break;
	162	}
	163	}
	164
	165	/* Check if we can find the die revision */
	166	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	167	if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
84a34344	168	omap_revision = omap_ids[i].type;
f577ffd7 TL	169	break;
	170	}
	171	}
	172
	173	/* Finally check also the omap_id */
	174	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	175	if (jtag_id == omap_ids[i].jtag_id
	176	&& die_rev == omap_ids[i].die_rev
	177	&& omap_id == omap_ids[i].omap_id) {
84a34344	178	omap_revision = omap_ids[i].type;
f577ffd7 TL	179	break;
	180	}
	181	}
	182
	183	/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
84a34344	184	cpu_type = omap_revision >> 24;
f577ffd7 TL	185
	186	switch (cpu_type) {
	187	case 0x07:
ae302f40	188	case 0x08:
84a34344	189	omap_revision \|= 0x07;
f577ffd7	190	break;
3179a019	191	case 0x03:
f577ffd7	192	case 0x15:
84a34344	193	omap_revision \|= 0x15;
f577ffd7 TL	194	break;
	195	case 0x16:
	196	case 0x17:
84a34344	197	omap_revision \|= 0x16;
f577ffd7	198	break;
f577ffd7	199	default:
84a34344	200	printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
f577ffd7 TL	201	}
f577ffd7 TL	202
84a34344 LL	203	printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
	204	if ((omap_revision >> 8) & 0xff)
	205	printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
	206	printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
	207	die_rev, omap_revision & 0xff, system_serial_low,
f577ffd7 TL	208	system_serial_high);
	209	}
	210