[mirror_ubuntu-zesty-kernel.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 <plat/cpu.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>
ce491cf8	18	#include <plat/cpu.h>
f577ffd7	19
3179a019 TL	20	#define OMAP_DIE_ID_0 0xfffe1800
	21	#define OMAP_DIE_ID_1 0xfffe1804
	22	#define OMAP_PRODUCTION_ID_0 0xfffe2000
	23	#define OMAP_PRODUCTION_ID_1 0xfffe2004
	24	#define OMAP32_ID_0 0xfffed400
	25	#define OMAP32_ID_1 0xfffed404
	26
f577ffd7 TL	27	struct omap_id {
	28	u16 jtag_id; /* Used to determine OMAP type */
	29	u8 die_rev; /* Processor revision */
	30	u32 omap_id; /* OMAP revision */
	31	u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
	32	};
	33
84a34344 LL	34	static unsigned int omap_revision;
84a34344 LL	35
f577ffd7 TL	36	/* Register values to detect the OMAP version */
f577ffd7 TL	37	static struct omap_id omap_ids[] __initdata = {
3179a019	38	{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
f577ffd7 TL	39	{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
f577ffd7 TL	40	{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
f5ee2fc7	41	{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
f577ffd7 TL	42	{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
	43	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
	44	{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
	45	{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
	46	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
	47	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	48	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	49	{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
	50	{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
	51	{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
	52	{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
	53	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
	54	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
	55	{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
	56	{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
	57	{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
	58	};
	59
84a34344 LL	60	unsigned int omap_rev(void)
	61	{
	62	return omap_revision;
	63	}
	64	EXPORT_SYMBOL(omap_rev);
	65
f577ffd7 TL	66	/*
	67	* Get OMAP type from PROD_ID.
	68	* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
	69	* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
	70	* Undocumented register in TEST BLOCK is used as fallback; This seems to
	71	* work on 1510, 1610 & 1710. The official way hopefully will work in future
	72	* processors.
	73	*/
	74	static u16 __init omap_get_jtag_id(void)
	75	{
	76	u32 prod_id, omap_id;
	77
	78	prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
	79	omap_id = omap_readl(OMAP32_ID_1);
	80
ae302f40	81	/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
f577ffd7 TL	82	if (((prod_id >> 20) == 0) \|\| (prod_id == omap_id))
	83	prod_id = 0;
	84	else
	85	prod_id &= 0xffff;
	86
	87	if (prod_id)
	88	return prod_id;
	89
	90	/* Use OMAP32_ID_1 as fallback */
	91	prod_id = ((omap_id >> 12) & 0xffff);
	92
	93	return prod_id;
	94	}
	95
	96	/*
	97	* Get OMAP revision from DIE_REV.
	98	* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
	99	* Undocumented register in the TEST BLOCK is used as fallback.
	100	* REVISIT: This does not seem to work on 1510
	101	*/
	102	static u8 __init omap_get_die_rev(void)
	103	{
	104	u32 die_rev;
	105
	106	die_rev = omap_readl(OMAP_DIE_ID_1);
	107
	108	/* Check for broken OMAP_DIE_ID on early 1710 */
	109	if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
	110	die_rev = 0;
	111
	112	die_rev = (die_rev >> 17) & 0xf;
	113	if (die_rev)
	114	return die_rev;
	115
	116	die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
	117
	118	return die_rev;
	119	}
	120
	121	void __init omap_check_revision(void)
	122	{
	123	int i;
	124	u16 jtag_id;
	125	u8 die_rev;
	126	u32 omap_id;
	127	u8 cpu_type;
	128
	129	jtag_id = omap_get_jtag_id();
	130	die_rev = omap_get_die_rev();
	131	omap_id = omap_readl(OMAP32_ID_0);
	132
	133	#ifdef DEBUG
84a34344 LL	134	printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
84a34344 LL	135	printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
f577ffd7 TL	136	omap_readl(OMAP_DIE_ID_1),
f577ffd7 TL	137	(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
84a34344 LL	138	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
	139	omap_readl(OMAP_PRODUCTION_ID_0));
	140	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
f577ffd7 TL	141	omap_readl(OMAP_PRODUCTION_ID_1),
f577ffd7 TL	142	omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
84a34344 LL	143	printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
	144	printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
	145	printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
f577ffd7 TL	146	#endif
	147
	148	system_serial_high = omap_readl(OMAP_DIE_ID_0);
	149	system_serial_low = omap_readl(OMAP_DIE_ID_1);
	150
	151	/* First check only the major version in a safe way */
	152	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	153	if (jtag_id == (omap_ids[i].jtag_id)) {
84a34344	154	omap_revision = omap_ids[i].type;
f577ffd7 TL	155	break;
	156	}
	157	}
	158
	159	/* Check if we can find the die revision */
	160	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	161	if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
84a34344	162	omap_revision = omap_ids[i].type;
f577ffd7 TL	163	break;
	164	}
	165	}
	166
	167	/* Finally check also the omap_id */
	168	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	169	if (jtag_id == omap_ids[i].jtag_id
	170	&& die_rev == omap_ids[i].die_rev
	171	&& omap_id == omap_ids[i].omap_id) {
84a34344	172	omap_revision = omap_ids[i].type;
f577ffd7 TL	173	break;
	174	}
	175	}
	176
	177	/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
84a34344	178	cpu_type = omap_revision >> 24;
f577ffd7 TL	179
	180	switch (cpu_type) {
	181	case 0x07:
ae302f40	182	case 0x08:
84a34344	183	omap_revision \|= 0x07;
f577ffd7	184	break;
3179a019	185	case 0x03:
f577ffd7	186	case 0x15:
84a34344	187	omap_revision \|= 0x15;
f577ffd7 TL	188	break;
	189	case 0x16:
	190	case 0x17:
84a34344	191	omap_revision \|= 0x16;
f577ffd7	192	break;
f577ffd7	193	default:
84a34344	194	printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
f577ffd7 TL	195	}
f577ffd7 TL	196
84a34344 LL	197	printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
	198	if ((omap_revision >> 8) & 0xff)
	199	printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
	200	printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
	201	die_rev, omap_revision & 0xff, system_serial_low,
f577ffd7 TL	202	system_serial_high);
	203	}
	204