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TOMOYO Linux Cross Reference
Linux/include/linux/platform_data/i2c-pxa.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  *  i2c_pxa.h
  4  *
  5  *  Copyright (C) 2002 Intrinsyc Software Inc.
  6  */
  7 #ifndef _I2C_PXA_H_
  8 #define _I2C_PXA_H_
  9 
 10 #if 0
 11 #define DEF_TIMEOUT             3
 12 #else
 13 /* need a longer timeout if we're dealing with the fact we may well be
 14  * looking at a multi-master environment
 15 */
 16 #define DEF_TIMEOUT             32
 17 #endif
 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 
 58 struct i2c_slave_client;
 59 
 60 struct i2c_pxa_platform_data {
 61         unsigned int            slave_addr;
 62         struct i2c_slave_client *slave;
 63         unsigned int            class;
 64         unsigned int            use_pio :1;
 65         unsigned int            fast_mode :1;
 66         unsigned int            high_mode:1;
 67         unsigned char           master_code;
 68         unsigned long           rate;
 69 };
 70 #endif
 71 

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