[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
+