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 <[email protected]>
diff --git a/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h b/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
index 5d949d7..780c851 100644
--- a/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
+++ b/include/asm-arm/arch-ixp4xx/ixp4xx-regs.h
@@ -607,4 +607,51 @@
#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)
+
+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
-
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