forked from mirrors/linux
d2912cb15b
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* i2c_pxa.h
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*
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* Copyright (C) 2002 Intrinsyc Software Inc.
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*/
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#ifndef _I2C_PXA_H_
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#define _I2C_PXA_H_
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#if 0
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#define DEF_TIMEOUT 3
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#else
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/* need a longer timeout if we're dealing with the fact we may well be
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* looking at a multi-master environment
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*/
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#define DEF_TIMEOUT 32
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#endif
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#define BUS_ERROR (-EREMOTEIO)
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#define XFER_NAKED (-ECONNREFUSED)
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#define I2C_RETRY (-2000) /* an error has occurred retry transmit */
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/* ICR initialize bit values
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*
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* 15. FM 0 (100 Khz operation)
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* 14. UR 0 (No unit reset)
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* 13. SADIE 0 (Disables the unit from interrupting on slave addresses
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* matching its slave address)
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* 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration
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* in master mode)
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* 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode)
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* 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent)
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* 9. IRFIE 1 (Enable interrupts from full buffer received)
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* 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty)
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* 7. GCD 1 (Disables i2c unit response to general call messages as a slave)
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* 6. IUE 0 (Disable unit until we change settings)
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* 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL)
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* 4. MA 0 (Only send stop with the ICR stop bit)
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* 3. TB 0 (We are not transmitting a byte initially)
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* 2. ACKNAK 0 (Send an ACK after the unit receives a byte)
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* 1. STOP 0 (Do not send a STOP)
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* 0. START 0 (Do not send a START)
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*
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*/
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#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
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/* I2C status register init values
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*
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* 10. BED 1 (Clear bus error detected)
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* 9. SAD 1 (Clear slave address detected)
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* 7. IRF 1 (Clear IDBR Receive Full)
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* 6. ITE 1 (Clear IDBR Transmit Empty)
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* 5. ALD 1 (Clear Arbitration Loss Detected)
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* 4. SSD 1 (Clear Slave Stop Detected)
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*/
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#define I2C_ISR_INIT 0x7FF /* status register init */
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struct i2c_slave_client;
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struct i2c_pxa_platform_data {
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unsigned int slave_addr;
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struct i2c_slave_client *slave;
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unsigned int class;
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unsigned int use_pio :1;
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unsigned int fast_mode :1;
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unsigned int high_mode:1;
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unsigned char master_code;
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unsigned long rate;
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};
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#endif
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