[mirror_ubuntu-artful-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 <asm/system_info.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>
9f97da78	18	#include <asm/system_info.h>
ce491cf8	19	#include <plat/cpu.h>
f577ffd7	20
3179a019 TL	21	#define OMAP_DIE_ID_0 0xfffe1800
	22	#define OMAP_DIE_ID_1 0xfffe1804
	23	#define OMAP_PRODUCTION_ID_0 0xfffe2000
	24	#define OMAP_PRODUCTION_ID_1 0xfffe2004
	25	#define OMAP32_ID_0 0xfffed400
	26	#define OMAP32_ID_1 0xfffed404
	27
f577ffd7 TL	28	struct omap_id {
	29	u16 jtag_id; /* Used to determine OMAP type */
	30	u8 die_rev; /* Processor revision */
	31	u32 omap_id; /* OMAP revision */
	32	u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
	33	};
	34
84a34344 LL	35	static unsigned int omap_revision;
84a34344 LL	36
f577ffd7 TL	37	/* Register values to detect the OMAP version */
f577ffd7 TL	38	static struct omap_id omap_ids[] __initdata = {
3179a019	39	{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
f577ffd7 TL	40	{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
f577ffd7 TL	41	{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
f5ee2fc7	42	{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
f577ffd7 TL	43	{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
	44	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
	45	{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
	46	{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
	47	{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
	48	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	49	{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
	50	{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
	51	{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
	52	{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
	53	{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
	54	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
	55	{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
	56	{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
	57	{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
	58	{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
	59	};
	60
84a34344 LL	61	unsigned int omap_rev(void)
	62	{
	63	return omap_revision;
	64	}
	65	EXPORT_SYMBOL(omap_rev);
	66
f577ffd7 TL	67	/*
	68	* Get OMAP type from PROD_ID.
	69	* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
	70	* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
	71	* Undocumented register in TEST BLOCK is used as fallback; This seems to
	72	* work on 1510, 1610 & 1710. The official way hopefully will work in future
	73	* processors.
	74	*/
	75	static u16 __init omap_get_jtag_id(void)
	76	{
	77	u32 prod_id, omap_id;
	78
	79	prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
	80	omap_id = omap_readl(OMAP32_ID_1);
	81
ae302f40	82	/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
f577ffd7 TL	83	if (((prod_id >> 20) == 0) \|\| (prod_id == omap_id))
	84	prod_id = 0;
	85	else
	86	prod_id &= 0xffff;
	87
	88	if (prod_id)
	89	return prod_id;
	90
	91	/* Use OMAP32_ID_1 as fallback */
	92	prod_id = ((omap_id >> 12) & 0xffff);
	93
	94	return prod_id;
	95	}
	96
	97	/*
	98	* Get OMAP revision from DIE_REV.
	99	* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
	100	* Undocumented register in the TEST BLOCK is used as fallback.
	101	* REVISIT: This does not seem to work on 1510
	102	*/
	103	static u8 __init omap_get_die_rev(void)
	104	{
	105	u32 die_rev;
	106
	107	die_rev = omap_readl(OMAP_DIE_ID_1);
	108
	109	/* Check for broken OMAP_DIE_ID on early 1710 */
	110	if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
	111	die_rev = 0;
	112
	113	die_rev = (die_rev >> 17) & 0xf;
	114	if (die_rev)
	115	return die_rev;
	116
	117	die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
	118
	119	return die_rev;
	120	}
	121
	122	void __init omap_check_revision(void)
	123	{
	124	int i;
	125	u16 jtag_id;
	126	u8 die_rev;
	127	u32 omap_id;
	128	u8 cpu_type;
	129
	130	jtag_id = omap_get_jtag_id();
	131	die_rev = omap_get_die_rev();
	132	omap_id = omap_readl(OMAP32_ID_0);
	133
	134	#ifdef DEBUG
84a34344 LL	135	printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
84a34344 LL	136	printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
f577ffd7 TL	137	omap_readl(OMAP_DIE_ID_1),
f577ffd7 TL	138	(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
84a34344 LL	139	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
	140	omap_readl(OMAP_PRODUCTION_ID_0));
	141	printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
f577ffd7 TL	142	omap_readl(OMAP_PRODUCTION_ID_1),
f577ffd7 TL	143	omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
84a34344 LL	144	printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
	145	printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
	146	printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
f577ffd7 TL	147	#endif
	148
	149	system_serial_high = omap_readl(OMAP_DIE_ID_0);
	150	system_serial_low = omap_readl(OMAP_DIE_ID_1);
	151
	152	/* First check only the major version in a safe way */
	153	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	154	if (jtag_id == (omap_ids[i].jtag_id)) {
84a34344	155	omap_revision = omap_ids[i].type;
f577ffd7 TL	156	break;
	157	}
	158	}
	159
	160	/* Check if we can find the die revision */
	161	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	162	if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
84a34344	163	omap_revision = omap_ids[i].type;
f577ffd7 TL	164	break;
	165	}
	166	}
	167
	168	/* Finally check also the omap_id */
	169	for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
	170	if (jtag_id == omap_ids[i].jtag_id
	171	&& die_rev == omap_ids[i].die_rev
	172	&& omap_id == omap_ids[i].omap_id) {
84a34344	173	omap_revision = omap_ids[i].type;
f577ffd7 TL	174	break;
	175	}
	176	}
	177
	178	/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
84a34344	179	cpu_type = omap_revision >> 24;
f577ffd7 TL	180
	181	switch (cpu_type) {
	182	case 0x07:
ae302f40	183	case 0x08:
84a34344	184	omap_revision \|= 0x07;
f577ffd7	185	break;
3179a019	186	case 0x03:
f577ffd7	187	case 0x15:
84a34344	188	omap_revision \|= 0x15;
f577ffd7 TL	189	break;
	190	case 0x16:
	191	case 0x17:
84a34344	192	omap_revision \|= 0x16;
f577ffd7	193	break;
f577ffd7	194	default:
84a34344	195	printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
f577ffd7 TL	196	}
f577ffd7 TL	197
84a34344 LL	198	printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
	199	if ((omap_revision >> 8) & 0xff)
	200	printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
	201	printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
	202	die_rev, omap_revision & 0xff, system_serial_low,
f577ffd7 TL	203	system_serial_high);
	204	}
	205