Adds "fuse" functions to help determine installed IXP4xx CPU

components and to reset/disable/enable them (only NPE - network

coprocessors - can be reset and reenabled).
Signed-off-by: Krzysztof Halasa 
diff --git a/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h b/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h

index 5d949d7..5652c41 100644

--- a/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h

+++ b/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h

@@ -607,4 +607,55 @@
 #define DCMD_LENGTH	0x01fff		/* length mask (max = 8K - 1) */
+/* Fuse Bits of IXP_EXP_CFG2 */

+#define IXP4XX_FUSE_RCOMP		(1 << 0)

+#define IXP4XX_FUSE_USB_DEVICE		(1 << 1)

+#define IXP4XX_FUSE_HASH		(1 << 2)

+#define IXP4XX_FUSE_AES			(1 << 3)

+#define IXP4XX_FUSE_DES			(1 << 4)

+#define IXP4XX_FUSE_HDLC		(1 << 5)

+#define IXP4XX_FUSE_AAL			(1 << 6)

+#define IXP4XX_FUSE_HSS			(1 << 7)

+#define IXP4XX_FUSE_UTOPIA		(1 << 8)

+#define IXP4XX_FUSE_NPEB_ETH0		(1 << 9)

+#define IXP4XX_FUSE_NPEC_ETH		(1 << 10)

+#define IXP4XX_FUSE_RESET_NPEA		(1 << 11)

+#define IXP4XX_FUSE_RESET_NPEB		(1 << 12)

+#define IXP4XX_FUSE_RESET_NPEC		(1 << 13)

+#define IXP4XX_FUSE_PCI			(1 << 14)

+#define IXP4XX_FUSE_ECC_TIMESYNC	(1 << 15)

+#define IXP4XX_FUSE_UTOPIA_PHY_LIMIT	(3 << 16)

+#define IXP4XX_FUSE_USB_HOST		(1 << 18)

+#define IXP4XX_FUSE_NPEA_ETH		(1 << 19)

+#define IXP4XX_FUSE_NPEB_ETH_1_TO_3	(1 << 20)

+#define IXP4XX_FUSE_RSA			(1 << 21)

+#define IXP4XX_FUSE_XSCALE_MAX_FREQ	(3 << 22)

+#define IXP4XX_FUSE_RESERVED		(0xFF << 24)

+

+#define IXP4XX_FUSE_IXP46X_ONLY (IXP4XX_FUSE_ECC_TIMESYNC |		\

+				 IXP4XX_FUSE_USB_HOST |			\

+				 IXP4XX_FUSE_NPEA_ETH |			\

+				 IXP4XX_FUSE_NPEB_ETH_1_TO_3 |		\

+				 IXP4XX_FUSE_RSA |			\

+				 IXP4XX_FUSE_XSCALE_MAX_FREQ)

+

+#ifndef __ASSEMBLY__

+

+static inline u32 ixp4xx_read_fuses(void)

+{

+	unsigned int fuses = ~*IXP4XX_EXP_CFG2;

+	fuses &= ~IXP4XX_FUSE_RESERVED;

+	if (!cpu_is_ixp46x())

+		fuses &= ~IXP4XX_FUSE_IXP46X_ONLY;

+

+	return fuses;

+}

+

+static inline void ixp4xx_write_fuses(u32 value)

+{

+	*IXP4XX_EXP_CFG2 = ~value;

+}

+

+#endif /* __ASSEMBLY__ */

+

 #endif

-

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