[ARM] 3868/1: AT91 hardware header update

This patch adds the hardware register definitions for the TWI (I2C)
controller found on the AT91RM9200 and AT91SAM9xx processors.
It also defines the AIC Fast-Forcing registers added to the AT91SAM9's.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 57 insertions, 0 deletions

diff --git a/include/asm-arm/arch-at91rm9200/at91rm9200_twi.h b/include/asm-arm/arch-at91rm9200/at91rm9200_twi.h
new file mode 100644
index 000000000000..93547d7482bd
--- /dev/null
+++ b/include/asm-arm/arch-at91rm9200/at91rm9200_twi.h
@@ -0,0 +1,57 @@
+/*
+ * include/asm-arm/arch-at91rm9200/at91rm9200_twi.h
+ *
+ * Copyright (C) 2005 Ivan Kokshaysky
+ * Copyright (C) SAN People
+ *
+ * Two-wire Interface (TWI) registers.
+ * Based on AT91RM9200 datasheet revision E.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef AT91RM9200_TWI_H
+#define AT91RM9200_TWI_H
+
+#define	AT91_TWI_CR		0x00		/* Control Register */
+#define		AT91_TWI_START		(1 <<  0)	/* Send a Start Condition */
+#define		AT91_TWI_STOP		(1 <<  1)	/* Send a Stop Condition */
+#define		AT91_TWI_MSEN		(1 <<  2)	/* Master Transfer Enable */
+#define		AT91_TWI_MSDIS		(1 <<  3)	/* Master Transfer Disable */
+#define		AT91_TWI_SWRST		(1 <<  7)	/* Software Reset */
+
+#define	AT91_TWI_MMR		0x04		/* Master Mode Register */
+#define		AT91_TWI_IADRSZ		(3    <<  8)	/* Internal Device Address Size */
+#define			AT91_TWI_IADRSZ_NO		(0 << 8)
+#define			AT91_TWI_IADRSZ_1		(1 << 8)
+#define			AT91_TWI_IADRSZ_2		(2 << 8)
+#define			AT91_TWI_IADRSZ_3		(3 << 8)
+#define		AT91_TWI_MREAD		(1    << 12)	/* Master Read Direction */
+#define		AT91_TWI_DADR		(0x7f << 16)	/* Device Address */
+
+#define	AT91_TWI_IADR		0x0c		/* Internal Address Register */
+
+#define	AT91_TWI_CWGR		0x10		/* Clock Waveform Generator Register */
+#define		AT91_TWI_CLDIV		(0xff <<  0)	/* Clock Low Divisor */
+#define		AT91_TWI_CHDIV		(0xff <<  8)	/* Clock High Divisor */
+#define		AT91_TWI_CKDIV		(7    << 16)	/* Clock Divider */
+
+#define	AT91_TWI_SR		0x20		/* Status Register */
+#define		AT91_TWI_TXCOMP		(1 <<  0)	/* Transmission Complete */
+#define		AT91_TWI_RXRDY		(1 <<  1)	/* Receive Holding Register Ready */
+#define		AT91_TWI_TXRDY		(1 <<  2)	/* Transmit Holding Register Ready */
+#define		AT91_TWI_OVRE		(1 <<  6)	/* Overrun Error */
+#define		AT91_TWI_UNRE		(1 <<  7)	/* Underrun Error */
+#define		AT91_TWI_NACK		(1 <<  8)	/* Not Acknowledged */
+
+#define	AT91_TWI_IER		0x24		/* Interrupt Enable Register */
+#define	AT91_TWI_IDR		0x28		/* Interrupt Disable Register */
+#define	AT91_TWI_IMR		0x2c		/* Interrupt Mask Register */
+#define	AT91_TWI_RHR		0x30		/* Receive Holding Register */
+#define	AT91_TWI_THR		0x34		/* Transmit Holding Register */
+
+#endif
+