| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-at91/include/mach/at91_twi.h |
| 3 | * |
| 4 | * Copyright (C) 2005 Ivan Kokshaysky |
| 5 | * Copyright (C) SAN People |
| 6 | * |
| 7 | * Two-wire Interface (TWI) registers. |
| 8 | * Based on AT91RM9200 datasheet revision E. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | */ |
| 15 | |
| 16 | #ifndef AT91_TWI_H |
| 17 | #define AT91_TWI_H |
| 18 | |
| 19 | #define AT91_TWI_CR 0x00 /* Control Register */ |
| 20 | #define AT91_TWI_START (1 << 0) /* Send a Start Condition */ |
| 21 | #define AT91_TWI_STOP (1 << 1) /* Send a Stop Condition */ |
| 22 | #define AT91_TWI_MSEN (1 << 2) /* Master Transfer Enable */ |
| 23 | #define AT91_TWI_MSDIS (1 << 3) /* Master Transfer Disable */ |
| 24 | #define AT91_TWI_SVEN (1 << 4) /* Slave Transfer Enable [SAM9260 only] */ |
| 25 | #define AT91_TWI_SVDIS (1 << 5) /* Slave Transfer Disable [SAM9260 only] */ |
| 26 | #define AT91_TWI_SWRST (1 << 7) /* Software Reset */ |
| 27 | |
| 28 | #define AT91_TWI_MMR 0x04 /* Master Mode Register */ |
| 29 | #define AT91_TWI_IADRSZ (3 << 8) /* Internal Device Address Size */ |
| 30 | #define AT91_TWI_IADRSZ_NO (0 << 8) |
| 31 | #define AT91_TWI_IADRSZ_1 (1 << 8) |
| 32 | #define AT91_TWI_IADRSZ_2 (2 << 8) |
| 33 | #define AT91_TWI_IADRSZ_3 (3 << 8) |
| 34 | #define AT91_TWI_MREAD (1 << 12) /* Master Read Direction */ |
| 35 | #define AT91_TWI_DADR (0x7f << 16) /* Device Address */ |
| 36 | |
| 37 | #define AT91_TWI_SMR 0x08 /* Slave Mode Register [SAM9260 only] */ |
| 38 | #define AT91_TWI_SADR (0x7f << 16) /* Slave Address */ |
| 39 | |
| 40 | #define AT91_TWI_IADR 0x0c /* Internal Address Register */ |
| 41 | |
| 42 | #define AT91_TWI_CWGR 0x10 /* Clock Waveform Generator Register */ |
| 43 | #define AT91_TWI_CLDIV (0xff << 0) /* Clock Low Divisor */ |
| 44 | #define AT91_TWI_CHDIV (0xff << 8) /* Clock High Divisor */ |
| 45 | #define AT91_TWI_CKDIV (7 << 16) /* Clock Divider */ |
| 46 | |
| 47 | #define AT91_TWI_SR 0x20 /* Status Register */ |
| 48 | #define AT91_TWI_TXCOMP (1 << 0) /* Transmission Complete */ |
| 49 | #define AT91_TWI_RXRDY (1 << 1) /* Receive Holding Register Ready */ |
| 50 | #define AT91_TWI_TXRDY (1 << 2) /* Transmit Holding Register Ready */ |
| 51 | #define AT91_TWI_SVREAD (1 << 3) /* Slave Read [SAM9260 only] */ |
| 52 | #define AT91_TWI_SVACC (1 << 4) /* Slave Access [SAM9260 only] */ |
| 53 | #define AT91_TWI_GACC (1 << 5) /* General Call Access [SAM9260 only] */ |
| 54 | #define AT91_TWI_OVRE (1 << 6) /* Overrun Error [AT91RM9200 only] */ |
| 55 | #define AT91_TWI_UNRE (1 << 7) /* Underrun Error [AT91RM9200 only] */ |
| 56 | #define AT91_TWI_NACK (1 << 8) /* Not Acknowledged */ |
| 57 | #define AT91_TWI_ARBLST (1 << 9) /* Arbitration Lost [SAM9260 only] */ |
| 58 | #define AT91_TWI_SCLWS (1 << 10) /* Clock Wait State [SAM9260 only] */ |
| 59 | #define AT91_TWI_EOSACC (1 << 11) /* End of Slave Address [SAM9260 only] */ |
| 60 | |
| 61 | #define AT91_TWI_IER 0x24 /* Interrupt Enable Register */ |
| 62 | #define AT91_TWI_IDR 0x28 /* Interrupt Disable Register */ |
| 63 | #define AT91_TWI_IMR 0x2c /* Interrupt Mask Register */ |
| 64 | #define AT91_TWI_RHR 0x30 /* Receive Holding Register */ |
| 65 | #define AT91_TWI_THR 0x34 /* Transmit Holding Register */ |
| 66 | |
| 67 | #endif |
| 68 | |