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Commit 11825ff4 authored by Imre Deak's avatar Imre Deak Committed by Tony Lindgren
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[PATCH] ARM: OMAP: OMAP2 CPU identification 

I put together this basic OMAP2 identification code, since I would need
to distinguish between 2410 and 2420.

The second patch makes an attempt to fix up places where
cpu_is_omap2420() is used, replacing them with the newly introduced more
type specific macros. These are based on comments in the code.
parent a2981946
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Showing with 173 additions and 11 deletions
arch/arm/mach-omap1/id.c
View file @ 11825ff4
......@@ -18,6 +18,13 @@
#include <asm/io.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 */
......
arch/arm/mach-omap2/Makefile
View file @ 11825ff4
......@@ -3,7 +3,7 @@
#
# Common support
obj-y := irq.o io.o sram-fn.o clock.o mux.o devices.o serial.o
obj-y := irq.o id.o io.o sram-fn.o clock.o mux.o devices.o serial.o
obj-$(CONFIG_OMAP_MPU_TIMER) += timer-gp.o
......
arch/arm/mach-omap2/id.c 0 → 100644
View file @ 11825ff4
/*
* linux/arch/arm/mach-omap2/id.c
*
* OMAP2 CPU identification code
*
* Copyright (C) 2005 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/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#define OMAP24XX_TAP_BASE io_p2v(0x48014000)
#define OMAP_TAP_IDCODE 0x0204
#define OMAP_TAP_PROD_ID 0x0208
#define OMAP_TAP_DIE_ID_0 0x0218
#define OMAP_TAP_DIE_ID_1 0x021C
#define OMAP_TAP_DIE_ID_2 0x0220
#define OMAP_TAP_DIE_ID_3 0x0224
/* system_rev fields for OMAP2 processors:
* CPU id bits [31:16],
* CPU device type [15:12], (unprg,normal,POP)
* CPU revision [11:08]
* CPU class bits [07:00]
*/
struct omap_id {
u16 hawkeye; /* Silicon type (Hawkeye id) */
u8 dev; /* Device type from production_id reg */
u32 type; /* combined type id copied to system_rev */
};
/* Register values to detect the OMAP version */
static struct omap_id omap_ids[] __initdata = {
{ .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200000 },
{ .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201000 },
{ .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202000 },
{ .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220000 },
{ .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230000 },
{ .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300000 },
};
static u32 __init read_tap_reg(int reg)
{
return __raw_readl(OMAP24XX_TAP_BASE + reg);
}
void __init omap2_check_revision(void)
{
int i, j;
u32 idcode;
u32 prod_id;
u16 hawkeye;
u8 dev_type;
u8 rev;
idcode = read_tap_reg(OMAP_TAP_IDCODE);
prod_id = read_tap_reg(OMAP_TAP_PROD_ID);
hawkeye = (idcode >> 12) & 0xffff;
rev = (idcode >> 28) & 0x0f;
dev_type = (prod_id >> 16) & 0x0f;
#ifdef DEBUG
printk(KERN_DEBUG "OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n",
idcode, rev, hawkeye, (idcode >> 1) & 0x7ff);
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_0: 0x%08x\n",
read_tap_reg(OMAP_TAP_DIE_ID_0));
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n",
read_tap_reg(OMAP_TAP_DIE_ID_1),
(read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf);
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_2: 0x%08x\n",
read_tap_reg(OMAP_TAP_DIE_ID_2));
printk(KERN_DEBUG "OMAP_TAP_DIE_ID_3: 0x%08x\n",
read_tap_reg(OMAP_TAP_DIE_ID_3));
printk(KERN_DEBUG "OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n",
prod_id, dev_type);
#endif
/* Check hawkeye ids */
for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
if (hawkeye == omap_ids[i].hawkeye)
break;
}
if (i == ARRAY_SIZE(omap_ids)) {
printk(KERN_ERR "Unknown OMAP CPU id\n");
return;
}
for (j = i; j < ARRAY_SIZE(omap_ids); j++) {
if (dev_type == omap_ids[j].dev)
break;
}
if (j == ARRAY_SIZE(omap_ids)) {
printk(KERN_ERR "Unknown OMAP device type. "
"Handling it as OMAP%04x\n",
omap_ids[i].type >> 16);
j = i;
}
system_rev = omap_ids[j].type;
system_rev |= rev << 8;
/* Add the cpu class info (24xx) */
system_rev |= 0x24;
pr_info("OMAP%04x", system_rev >> 16);
if ((system_rev >> 8) & 0x0f)
printk("%x", (system_rev >> 8) & 0x0f);
printk("\n");
}
arch/arm/mach-omap2/io.c
View file @ 11825ff4
......@@ -22,6 +22,7 @@
extern void omap_sram_init(void);
extern int omap2_clk_init(void);
extern void omap2_check_revision(void);
/*
* The machine specific code may provide the extra mapping besides the
......@@ -35,6 +36,7 @@ static struct map_desc omap2_io_desc[] __initdata = {
void __init omap_map_common_io(void)
{
iotable_init(omap2_io_desc, ARRAY_SIZE(omap2_io_desc));
omap2_check_revision();
omap_sram_init();
omap2_mux_init();
omap2_clk_init();
......
include/asm-arm/arch-omap/cpu.h
View file @ 11825ff4
......@@ -28,12 +28,7 @@
extern unsigned int system_rev;
#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
#define omap2_cpu_rev() ((system_rev >> 8) & 0x0f)
/*
* Test if multicore OMAP support is needed
......@@ -81,7 +76,9 @@ extern unsigned int system_rev;
* cpu_is_omap7xx(): True for OMAP730
* cpu_is_omap15xx(): True for OMAP1510, OMAP5910 and OMAP310
* cpu_is_omap16xx(): True for OMAP1610, OMAP5912 and OMAP1710
* cpu_is_omap24xx(): True for OMAP2420
* cpu_is_omap24xx(): True for OMAP2420, OMAP2422, OMAP2423, OMAP2430
* cpu_is_omap242x(): True for OMAP2420, OMAP2422, OMAP2423
* cpu_is_omap243x(): True for OMAP2430
*/
#define GET_OMAP_CLASS (system_rev & 0xff)
......@@ -91,15 +88,28 @@ static inline int is_omap ##class (void) \
return (GET_OMAP_CLASS == (id)) ? 1 : 0; \
}
#define GET_OMAP_SUBCLASS ((system_rev >> 16) & 0x0fff)
#define IS_OMAP_SUBCLASS(subclass, id) \
static inline int is_omap ##subclass (void) \
{ \
return (GET_OMAP_SUBCLASS == (id)) ? 1 : 0; \
}
IS_OMAP_CLASS(7xx, 0x07)
IS_OMAP_CLASS(15xx, 0x15)
IS_OMAP_CLASS(16xx, 0x16)
IS_OMAP_CLASS(24xx, 0x24)
IS_OMAP_SUBCLASS(242x, 0x242)
IS_OMAP_SUBCLASS(243x, 0x243)
#define cpu_is_omap7xx() 0
#define cpu_is_omap15xx() 0
#define cpu_is_omap16xx() 0
#define cpu_is_omap24xx() 0
#define cpu_is_omap242x() 0
#define cpu_is_omap243x() 0
#if defined(MULTI_OMAP1)
# if defined(CONFIG_ARCH_OMAP730)
......@@ -129,7 +139,11 @@ IS_OMAP_CLASS(24xx, 0x24)
# endif
# if defined(CONFIG_ARCH_OMAP24XX)
# undef cpu_is_omap24xx
# undef cpu_is_omap242x
# undef cpu_is_omap243x
# define cpu_is_omap24xx() 1
# define cpu_is_omap242x() is_omap242x()
# define cpu_is_omap243x() is_omap243x()
# endif
#endif
......@@ -145,6 +159,9 @@ IS_OMAP_CLASS(24xx, 0x24)
* cpu_is_omap1621(): True for OMAP1621
* cpu_is_omap1710(): True for OMAP1710
* cpu_is_omap2420(): True for OMAP2420
* cpu_is_omap2422(): True for OMAP2422
* cpu_is_omap2423(): True for OMAP2423
* cpu_is_omap2430(): True for OMAP2430
*/
#define GET_OMAP_TYPE ((system_rev >> 16) & 0xffff)
......@@ -163,6 +180,9 @@ IS_OMAP_TYPE(5912, 0x1611)
IS_OMAP_TYPE(1621, 0x1621)
IS_OMAP_TYPE(1710, 0x1710)
IS_OMAP_TYPE(2420, 0x2420)
IS_OMAP_TYPE(2422, 0x2422)
IS_OMAP_TYPE(2423, 0x2423)
IS_OMAP_TYPE(2430, 0x2430)
#define cpu_is_omap310() 0
#define cpu_is_omap730() 0
......@@ -173,6 +193,9 @@ IS_OMAP_TYPE(2420, 0x2420)
#define cpu_is_omap1621() 0
#define cpu_is_omap1710() 0
#define cpu_is_omap2420() 0
#define cpu_is_omap2422() 0
#define cpu_is_omap2423() 0
#define cpu_is_omap2430() 0
#if defined(MULTI_OMAP1)
# if defined(CONFIG_ARCH_OMAP730)
......@@ -210,9 +233,15 @@ IS_OMAP_TYPE(2420, 0x2420)
# define cpu_is_omap1710() is_omap1710()
#endif
#if defined(CONFIG_ARCH_OMAP2420)
#if defined(CONFIG_ARCH_OMAP24XX)
# undef cpu_is_omap2420
# define cpu_is_omap2420() 1
# undef cpu_is_omap2422
# undef cpu_is_omap2423
# undef cpu_is_omap2430
# define cpu_is_omap2420() is_omap2420()
# define cpu_is_omap2422() is_omap2422()
# define cpu_is_omap2423() is_omap2423()
# define cpu_is_omap2430() is_omap2430()
#endif
/* Macros to detect if we have OMAP1 or OMAP2 */
......
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