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@@ -0,0 +1,96 @@
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+/*
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+ * linux/arch/arm/mach-omap2/id.c
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+ *
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+ * OMAP2 CPU identification code
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+ *
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+ * Copyright (C) 2005 Nokia Corporation
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+ * Written by Tony Lindgren <tony@atomide.com>
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+ *
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+ * Copyright (C) 2009-11 Texas Instruments
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+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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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+
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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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+
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+#include <asm/cputype.h>
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+
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+#include "common.h"
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+
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+#include "id.h"
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+
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+#include "soc.h"
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+#include "control.h"
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+
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+#define OMAP4_SILICON_TYPE_STANDARD 0x01
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+#define OMAP4_SILICON_TYPE_PERFORMANCE 0x02
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+
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+static unsigned int omap_revision;
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+static const char *cpu_rev;
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+u32 omap_features;
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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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+int omap_type(void)
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+{
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+ u32 val = 0;
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+
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+ if (cpu_is_omap24xx()) {
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+ val = omap_ctrl_readl(OMAP24XX_CONTROL_STATUS);
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+ } else if (soc_is_am33xx()) {
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+ val = omap_ctrl_readl(AM33XX_CONTROL_STATUS);
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+ } else if (cpu_is_omap34xx()) {
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+ val = omap_ctrl_readl(OMAP343X_CONTROL_STATUS);
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+ } else if (cpu_is_omap44xx()) {
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+ val = omap_ctrl_readl(OMAP4_CTRL_MODULE_CORE_STATUS);
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+ } else if (soc_is_omap54xx()) {
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+ val = omap_ctrl_readl(OMAP5XXX_CONTROL_STATUS);
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+ val &= OMAP5_DEVICETYPE_MASK;
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+ val >>= 6;
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+ goto out;
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+ } else {
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+ pr_err("Cannot detect omap type!\n");
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+ goto out;
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+ }
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+
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+ val &= OMAP2_DEVICETYPE_MASK;
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+ val >>= 8;
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+
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+out:
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+ return val;
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+}
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+EXPORT_SYMBOL(omap_type);
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+
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+
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+/*----------------------------------------------------------------------------*/
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+
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+#define OMAP_TAP_IDCODE 0x0204
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+#define OMAP_TAP_DIE_ID_0 0x0218
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+#define OMAP_TAP_DIE_ID_1 0x021C
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+#define OMAP_TAP_DIE_ID_2 0x0220
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+#define OMAP_TAP_DIE_ID_3 0x0224
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+
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+#define OMAP_TAP_DIE_ID_44XX_0 0x0200
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+#define OMAP_TAP_DIE_ID_44XX_1 0x0208
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+#define OMAP_TAP_DIE_ID_44XX_2 0x020c
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+#define OMAP_TAP_DIE_ID_44XX_3 0x0210
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+
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+#define read_tap_reg(reg) __raw_readl(tap_base + (reg))
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+
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+struct omap_id {
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+ u16 hawkeye; /* Silicon type (Hawkeye id) */
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+ u8 dev; /* Device type from production_id reg */
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+ u32 type; /* Combined type id copied to omap_revision */
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+};
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+
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+/* Register values to detect the OMAP version */
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袁明明