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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
i2c/
- drwxr-xr-x
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Viewing file:  pxa-i2c.h (2.73 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* i2c_pxa.h
*
* Copyright (C) 2002 Intrinsyc Software Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef _I2C_PXA_H_
#define _I2C_PXA_H_
#if 0
#define DEF_TIMEOUT 3
#else
/* need a longer timeout if we're dealing with the fact we may well be
* looking at a multi-master environment
*/
#define DEF_TIMEOUT 32
#endif
#define BUS_ERROR (-EREMOTEIO)
#define XFER_NAKED (-ECONNREFUSED)
#define I2C_RETRY (-2000) /* an error has occurred retry transmit */
/* ICR initialize bit values
*
* 15. FM 0 (100 Khz operation)
* 14. UR 0 (No unit reset)
* 13. SADIE 0 (Disables the unit from interrupting on slave addresses
* matching its slave address)
* 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration
* in master mode)
* 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode)
* 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent)
* 9. IRFIE 1 (Enable interrupts from full buffer received)
* 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty)
* 7. GCD 1 (Disables i2c unit response to general call messages as a slave)
* 6. IUE 0 (Disable unit until we change settings)
* 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL)
* 4. MA 0 (Only send stop with the ICR stop bit)
* 3. TB 0 (We are not transmitting a byte initially)
* 2. ACKNAK 0 (Send an ACK after the unit receives a byte)
* 1. STOP 0 (Do not send a STOP)
* 0. START 0 (Do not send a START)
*
*/
#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
/* I2C status register init values
*
* 10. BED 1 (Clear bus error detected)
* 9. SAD 1 (Clear slave address detected)
* 7. IRF 1 (Clear IDBR Receive Full)
* 6. ITE 1 (Clear IDBR Transmit Empty)
* 5. ALD 1 (Clear Arbitration Loss Detected)
* 4. SSD 1 (Clear Slave Stop Detected)
*/
#define I2C_ISR_INIT 0x7FF /* status register init */
struct i2c_slave_client;
struct i2c_pxa_platform_data {
unsigned int slave_addr;
struct i2c_slave_client *slave;
unsigned int class;
unsigned int use_pio :1;
unsigned int fast_mode :1;
};
extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info);
#ifdef CONFIG_PXA27x
extern void pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info);
#endif
#ifdef CONFIG_PXA3xx
extern void pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info);
#endif
#endif
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