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