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Diffstat (limited to 'roms/u-boot-sam460ex/include/at91rm9200_i2c.h')
| -rw-r--r-- | roms/u-boot-sam460ex/include/at91rm9200_i2c.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/roms/u-boot-sam460ex/include/at91rm9200_i2c.h b/roms/u-boot-sam460ex/include/at91rm9200_i2c.h new file mode 100644 index 000000000..c2ec2f18e --- /dev/null +++ b/roms/u-boot-sam460ex/include/at91rm9200_i2c.h @@ -0,0 +1,126 @@ +/* ---------------------------------------------------------------------------- */ +/* ATMEL Microcontroller Software Support - ROUSSET - */ +/* ---------------------------------------------------------------------------- */ +/* The software is delivered "AS IS" without warranty or condition of any */ +/* kind, either express, implied or statutory. This includes without */ +/* limitation any warranty or condition with respect to merchantability or */ +/* fitness for any particular purpose, or against the infringements of */ +/* intellectual property rights of others. */ +/* ---------------------------------------------------------------------------- */ +/* File Name : at91rm9200_i2c.h */ +/* Object : AT91RM9200 / TWI definitions */ +/* Generated : AT91 SW Application Group 12/03/2002 (10:48:02) */ +/* */ +/* ---------------------------------------------------------------------------- */ + +#ifndef AT91RM9200_TWI_H +#define AT91RM9200_TWI_H + +/* ******************************************************************************/ +/* SOFTWARE API DEFINITION FOR Two-wire Interface */ +/* ******************************************************************************/ +#ifndef __ASSEMBLY__ + +typedef struct _AT91S_TWI { + AT91_REG TWI_CR; /* Control Register */ + AT91_REG TWI_MMR; /* Master Mode Register */ + AT91_REG TWI_SMR; /* Slave Mode Register */ + AT91_REG TWI_IADR; /* Internal Address Register */ + AT91_REG TWI_CWGR; /* Clock Waveform Generator Register */ + AT91_REG Reserved0[3]; + AT91_REG TWI_SR; /* Status Register */ + AT91_REG TWI_IER; /* Interrupt Enable Register */ + AT91_REG TWI_IDR; /* Interrupt Disable Register */ + AT91_REG TWI_IMR; /* Interrupt Mask Register */ + AT91_REG TWI_RHR; /* Receive Holding Register */ + AT91_REG TWI_THR; /* Transmit Holding Register */ + AT91_REG Reserved1[50]; + AT91_REG TWI_RPR; /* Receive Pointer Register */ + AT91_REG TWI_RCR; /* Receive Counter Register */ + AT91_REG TWI_TPR; /* Transmit Pointer Register */ + AT91_REG TWI_TCR; /* Transmit Counter Register */ + AT91_REG TWI_RNPR; /* Receive Next Pointer Register */ + AT91_REG TWI_RNCR; /* Receive Next Counter Register */ + AT91_REG TWI_TNPR; /* Transmit Next Pointer Register */ + AT91_REG TWI_TNCR; /* Transmit Next Counter Register */ + AT91_REG TWI_PTCR; /* PDC Transfer Control Register */ + AT91_REG TWI_PTSR; /* PDC Transfer Status Register */ +} AT91S_TWI, *AT91PS_TWI; + +#endif + +/* -------- TWI_CR : (TWI Offset: 0x0) TWI Control Register -------- */ +#define AT91C_TWI_START (0x1 << 0) /* (TWI) Send a START Condition */ +#define AT91C_TWI_STOP (0x1 << 1) /* (TWI) Send a STOP Condition */ +#define AT91C_TWI_MSEN (0x1 << 2) /* (TWI) TWI Master Transfer Enabled */ +#define AT91C_TWI_MSDIS (0x1 << 3) /* (TWI) TWI Master Transfer Disabled */ +#define AT91C_TWI_SVEN (0x1 << 4) /* (TWI) TWI Slave Transfer Enabled */ +#define AT91C_TWI_SVDIS (0x1 << 5) /* (TWI) TWI Slave Transfer Disabled */ +#define AT91C_TWI_SWRST (0x1 << 7) /* (TWI) Software Reset */ +/* -------- TWI_MMR : (TWI Offset: 0x4) TWI Master Mode Register -------- */ +#define AT91C_TWI_IADRSZ (0x3 << 8) /* (TWI) Internal Device Address Size */ +#define AT91C_TWI_IADRSZ_NO (0x0 << 8) /* (TWI) No internal device address */ +#define AT91C_TWI_IADRSZ_1_BYTE (0x1 << 8) /* (TWI) One-byte internal device address */ +#define AT91C_TWI_IADRSZ_2_BYTE (0x2 << 8) /* (TWI) Two-byte internal device address */ +#define AT91C_TWI_IADRSZ_3_BYTE (0x3 << 8) /* (TWI) Three-byte internal device address */ +#define AT91C_TWI_MREAD (0x1 << 12) /* (TWI) Master Read Direction */ +#define AT91C_TWI_DADR (0x7F << 6) /* (TWI) Device Address */ +/* -------- TWI_SMR : (TWI Offset: 0x8) TWI Slave Mode Register -------- */ +#define AT91C_TWI_SADR (0x7F << 16) /* (TWI) Slave Device Address */ +/* -------- TWI_CWGR : (TWI Offset: 0x10) TWI Clock Waveform Generator Register -------- */ +#define AT91C_TWI_CLDIV (0xFF << 0) /* (TWI) Clock Low Divider */ +#define AT91C_TWI_CHDIV (0xFF << 8) /* (TWI) Clock High Divider */ +#define AT91C_TWI_CKDIV (0x7 << 16) /* (TWI) Clock Divider */ +/* -------- TWI_SR : (TWI Offset: 0x20) TWI Status Register -------- */ +#define AT91C_TWI_TXCOMP (0x1 << 0) /* (TWI) Transmission Completed */ +#define AT91C_TWI_RXRDY (0x1 << 1) /* (TWI) Receive holding register ReaDY */ +#define AT91C_TWI_TXRDY (0x1 << 2) /* (TWI) Transmit holding register ReaDY*/ +#define AT91C_TWI_SVREAD (0x1 << 3) /* (TWI) Slave Read */ +#define AT91C_TWI_SVACC (0x1 << 4) /* (TWI) Slave Access */ +#define AT91C_TWI_GCACC (0x1 << 5) /* (TWI) General Call Access */ +#define AT91C_TWI_OVRE (0x1 << 6) /* (TWI) Overrun Error */ +#define AT91C_TWI_UNRE (0x1 << 7) /* (TWI) Underrun Error */ +#define AT91C_TWI_NACK (0x1 << 8) /* (TWI) Not Acknowledged */ +#define AT91C_TWI_ARBLST (0x1 << 9) /* (TWI) Arbitration Lost */ +/* -------- TWI_IER : (TWI Offset: 0x24) TWI Interrupt Enable Register -------- */ +/* -------- TWI_IDR : (TWI Offset: 0x28) TWI Interrupt Disable Register ------- */ +/* -------- TWI_IMR : (TWI Offset: 0x2c) TWI Interrupt Mask Register -------- */ + +/* + i2c Support for Atmel's AT91RM9200 Two-Wire Interface + + (c) Rick Bronson + + 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. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#ifndef AT91_I2C_H +#define AT91_I2C_H + +#define AT91C_TWI_CLOCK 100000 +#define AT91C_TWI_SCLOCK (10 * AT91C_MASTER_CLOCK / AT91C_TWI_CLOCK) +#define AT91C_TWI_CKDIV1 (2 << 16) /* TWI clock divider. NOTE: see Errata #22 */ + +#if (AT91C_TWI_SCLOCK % 10) >= 5 +#define AT91C_TWI_CLDIV2 ((AT91C_TWI_SCLOCK / 10) - 5) +#else +#define AT91C_TWI_CLDIV2 ((AT91C_TWI_SCLOCK / 10) - 6) +#endif +#define AT91C_TWI_CLDIV3 ((AT91C_TWI_CLDIV2 + (4 - AT91C_TWI_CLDIV2 % 4)) >> 2) + +#define AT91C_EEPROM_I2C_ADDRESS (0x50 << 16) + +#endif /* __ASSEMBLY__ */ +#endif /* AT91RM9200_TWI_H */ |