1/* 2 * i2c_pxa.h 3 * 4 * Copyright (C) 2002 Intrinsyc Software Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 */ 11#ifndef _I2C_PXA_H_ 12#define _I2C_PXA_H_ 13 14/* need a longer timeout if we're dealing with the fact we may well be 15 * looking at a multi-master environment 16*/ 17#define DEF_TIMEOUT 32 18 19#define BUS_ERROR (-EREMOTEIO) 20#define XFER_NAKED (-ECONNREFUSED) 21#define I2C_RETRY (-2000) /* an error has occurred retry transmit */ 22 23/* ICR initialize bit values 24* 25* 15. FM 0 (100 Khz operation) 26* 14. UR 0 (No unit reset) 27* 13. SADIE 0 (Disables the unit from interrupting on slave addresses 28* matching its slave address) 29* 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration 30* in master mode) 31* 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode) 32* 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent) 33* 9. IRFIE 1 (Enable interrupts from full buffer received) 34* 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty) 35* 7. GCD 1 (Disables i2c unit response to general call messages as a slave) 36* 6. IUE 0 (Disable unit until we change settings) 37* 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL) 38* 4. MA 0 (Only send stop with the ICR stop bit) 39* 3. TB 0 (We are not transmitting a byte initially) 40* 2. ACKNAK 0 (Send an ACK after the unit receives a byte) 41* 1. STOP 0 (Do not send a STOP) 42* 0. START 0 (Do not send a START) 43* 44*/ 45#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) 46 47/* I2C status register init values 48 * 49 * 10. BED 1 (Clear bus error detected) 50 * 9. SAD 1 (Clear slave address detected) 51 * 7. IRF 1 (Clear IDBR Receive Full) 52 * 6. ITE 1 (Clear IDBR Transmit Empty) 53 * 5. ALD 1 (Clear Arbitration Loss Detected) 54 * 4. SSD 1 (Clear Slave Stop Detected) 55 */ 56#define I2C_ISR_INIT 0x7FF /* status register init */ 57 58struct i2c_slave_client; 59 60struct i2c_pxa_platform_data { 61 unsigned int slave_addr; 62 struct i2c_slave_client *slave; 63 unsigned int class; 64}; 65 66extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info); 67#endif 68