211 lines
6.4 KiB
C
211 lines
6.4 KiB
C
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/*
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* linux/arch/arm/mach-omap1/id.c
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*
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* OMAP1 CPU identification code
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*
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* Copyright (C) 2004 Nokia Corporation
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* Written by Tony Lindgren <tony@atomide.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <asm/system_info.h>
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#include "soc.h"
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#include <mach/hardware.h>
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#include "common.h"
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#define OMAP_DIE_ID_0 0xfffe1800
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#define OMAP_DIE_ID_1 0xfffe1804
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#define OMAP_PRODUCTION_ID_0 0xfffe2000
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#define OMAP_PRODUCTION_ID_1 0xfffe2004
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#define OMAP32_ID_0 0xfffed400
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#define OMAP32_ID_1 0xfffed404
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struct omap_id {
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u16 jtag_id; /* Used to determine OMAP type */
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u8 die_rev; /* Processor revision */
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u32 omap_id; /* OMAP revision */
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u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */
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};
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static unsigned int omap_revision;
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/* Register values to detect the OMAP version */
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static struct omap_id omap_ids[] __initdata = {
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{ .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
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{ .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
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{ .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
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{ .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000},
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{ .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
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{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
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{ .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
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{ .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
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{ .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
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{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
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{ .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
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{ .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
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{ .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
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{ .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
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{ .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
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{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
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{ .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
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{ .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
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{ .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
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{ .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
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};
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unsigned int omap_rev(void)
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{
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return omap_revision;
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}
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EXPORT_SYMBOL(omap_rev);
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/*
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* Get OMAP type from PROD_ID.
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* 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
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* 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
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* Undocumented register in TEST BLOCK is used as fallback; This seems to
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* work on 1510, 1610 & 1710. The official way hopefully will work in future
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* processors.
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*/
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static u16 __init omap_get_jtag_id(void)
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{
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u32 prod_id, omap_id;
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prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
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omap_id = omap_readl(OMAP32_ID_1);
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/* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */
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if (((prod_id >> 20) == 0) || (prod_id == omap_id))
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prod_id = 0;
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else
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prod_id &= 0xffff;
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if (prod_id)
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return prod_id;
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/* Use OMAP32_ID_1 as fallback */
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prod_id = ((omap_id >> 12) & 0xffff);
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return prod_id;
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}
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/*
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* Get OMAP revision from DIE_REV.
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* Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
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* Undocumented register in the TEST BLOCK is used as fallback.
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* REVISIT: This does not seem to work on 1510
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*/
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static u8 __init omap_get_die_rev(void)
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{
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u32 die_rev;
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die_rev = omap_readl(OMAP_DIE_ID_1);
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/* Check for broken OMAP_DIE_ID on early 1710 */
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if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
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die_rev = 0;
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die_rev = (die_rev >> 17) & 0xf;
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if (die_rev)
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return die_rev;
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die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
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return die_rev;
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}
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void __init omap_check_revision(void)
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{
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int i;
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u16 jtag_id;
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u8 die_rev;
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u32 omap_id;
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u8 cpu_type;
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jtag_id = omap_get_jtag_id();
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die_rev = omap_get_die_rev();
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omap_id = omap_readl(OMAP32_ID_0);
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#ifdef DEBUG
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printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
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printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
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omap_readl(OMAP_DIE_ID_1),
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(omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
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printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n",
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omap_readl(OMAP_PRODUCTION_ID_0));
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printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
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omap_readl(OMAP_PRODUCTION_ID_1),
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omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
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printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
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printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
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printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
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#endif
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system_serial_high = omap_readl(OMAP_DIE_ID_0);
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system_serial_low = omap_readl(OMAP_DIE_ID_1);
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/* First check only the major version in a safe way */
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for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
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if (jtag_id == (omap_ids[i].jtag_id)) {
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omap_revision = omap_ids[i].type;
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break;
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}
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}
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/* Check if we can find the die revision */
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for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
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if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
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omap_revision = omap_ids[i].type;
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break;
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}
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}
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/* Finally check also the omap_id */
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for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
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if (jtag_id == omap_ids[i].jtag_id
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&& die_rev == omap_ids[i].die_rev
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&& omap_id == omap_ids[i].omap_id) {
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omap_revision = omap_ids[i].type;
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break;
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}
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}
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/* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
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cpu_type = omap_revision >> 24;
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switch (cpu_type) {
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case 0x07:
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case 0x08:
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omap_revision |= 0x07;
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break;
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case 0x03:
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case 0x15:
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omap_revision |= 0x15;
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break;
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case 0x16:
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case 0x17:
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omap_revision |= 0x16;
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break;
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default:
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printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type);
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}
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printk(KERN_INFO "OMAP%04x", omap_revision >> 16);
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if ((omap_revision >> 8) & 0xff)
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printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff);
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printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n",
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die_rev, omap_revision & 0xff, system_serial_low,
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system_serial_high);
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}
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