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Thomas Gleixnerd2912cb2019-06-04 10:11:33 +02001/* SPDX-License-Identifier: GPL-2.0-only */
Russell Kingb652b432005-06-15 12:38:14 +01002/*
3 * i2c_pxa.h
4 *
5 * Copyright (C) 2002 Intrinsyc Software Inc.
Russell Kingb652b432005-06-15 12:38:14 +01006 */
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
58struct i2c_slave_client;
59
60struct i2c_pxa_platform_data {
61 unsigned int slave_addr;
62 struct i2c_slave_client *slave;
Matej Kendaa79220b2007-03-05 13:06:40 +010063 unsigned int class;
Jonathan Cameronc46c9482008-10-03 15:07:36 +010064 unsigned int use_pio :1;
65 unsigned int fast_mode :1;
Leilei Shang9d3dda52013-06-07 14:38:17 +080066 unsigned int high_mode:1;
67 unsigned char master_code;
68 unsigned long rate;
Russell Kingb652b432005-06-15 12:38:14 +010069};
Russell Kingb652b432005-06-15 12:38:14 +010070#endif