arch/arm/mach-omap1/id.c - kernel/msm-4.19 - Gitiles

 /*
  * 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 <mach/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 = 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 */
 	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:
 		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);
 }
	/*
	* 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 <mach/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 = 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 */
	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:
	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);
	}