ARM: OMAP: Add OMAP chip type structure; clean up mach-omap2/id.c

Add a new OMAP chip identification interface, omap_chip_id.
omap_chip_id is a structure which contains one bit for each OMAP2/3
CPU type, and on 3430, ES level.  For example, the CHIP_IS_OMAP2420
bit is set in omap_chip at boot on an OMAP2420.  On OMAP3430ES2, both
CHIP_IS_OMAP3430 and CHIP_IS_OMAP3430ES2 bits are set.

omap_chip is set in mach-omap2/id.c by _set_omap_chip(). Other
code should use the omap_chip_is() function to test against omap_chip.

Also, clean up id.c by splitting some code out of
omap_check_revision() into its own function, _set_system_rev(); and
converting some debug printk()s into pr_debug().

Second revision.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 37 insertions, 2 deletions

diff --git a/include/asm-arm/arch-omap/cpu.h b/include/asm-arm/arch-omap/cpu.h
index e8a4cf52778b..52db09f83281 100644
--- a/include/asm-arm/arch-omap/cpu.h
+++ b/include/asm-arm/arch-omap/cpu.h
@@ -3,7 +3,7 @@
  *
  * OMAP cpu type detection
  *
- * Copyright (C) 2004 Nokia Corporation
+ * Copyright (C) 2004, 2008 Nokia Corporation
  *
  * Written by Tony Lindgren <tony.lindgren@nokia.com>
  *
@@ -26,6 +26,12 @@
 #ifndef __ASM_ARCH_OMAP_CPU_H
 #define __ASM_ARCH_OMAP_CPU_H
 
+struct omap_chip_id {
+        u8 oc;
+};
+
+#define OMAP_CHIP_INIT(x)       { .oc = x }
+
 extern unsigned int system_rev;
 
 #define omap2_cpu_rev()         ((system_rev >> 12) & 0x0f)
@@ -345,6 +351,33 @@ IS_OMAP_TYPE(3430, 0x3430)
 #define OMAP2430_REV_ES1_0      0x24300000
 #define OMAP3430_REV_ES1_0      0x34300000
 #define OMAP3430_REV_ES2_0      0x34301000
+#define OMAP3430_REV_ES2_1      0x34302000
+#define OMAP3430_REV_ES2_2      0x34303000
+
+/*
+ * omap_chip bits
+ *
+ * CHIP_IS_OMAP{2420,2430,3430} indicate that a particular structure is
+ * valid on all chips of that type.  CHIP_IS_OMAP3430ES{1,2} indicates
+ * something that is only valid on that particular ES revision.
+ *
+ * These bits may be ORed together to indicate structures that are
+ * available on multiple chip types.
+ *
+ * To test whether a particular structure matches the current OMAP chip type,
+ * use omap_chip_is().
+ *
+ */
+#define CHIP_IS_OMAP2420       (1 << 0)
+#define CHIP_IS_OMAP2430       (1 << 1)
+#define CHIP_IS_OMAP3430       (1 << 2)
+#define CHIP_IS_OMAP3430ES1    (1 << 3)
+#define CHIP_IS_OMAP3430ES2    (1 << 4)
+
+#define CHIP_IS_OMAP24XX       (CHIP_IS_OMAP2420 | CHIP_IS_OMAP2430)
+
+int omap_chip_is(struct omap_chip_id oci);
+
 
 /*
  * Macro to detect device type i.e. EMU/HS/TST/GP/BAD
@@ -362,6 +395,8 @@ IS_OMAP_TYPE(3430, 0x3430)
 #define is_device_type_gp()     (get_device_type() == DEVICE_TYPE_GP)
 #define is_device_type_bad()    (get_device_type() == DEVICE_TYPE_BAD)
 
-#endif
+void omap2_check_revision(void);
+
+#endif    /* defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) */
 
 #endif