| Russell King | b652b43 | 2005-06-15 12:38:14 +0100 | [diff] [blame] | 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 | #if 0 |
| 15 | #define DEF_TIMEOUT 3 |
| 16 | #else |
| 17 | /* need a longer timeout if we're dealing with the fact we may well be |
| 18 | * looking at a multi-master environment |
| 19 | */ |
| 20 | #define DEF_TIMEOUT 32 |
| 21 | #endif |
| 22 | |
| 23 | #define BUS_ERROR (-EREMOTEIO) |
| 24 | #define XFER_NAKED (-ECONNREFUSED) |
| 25 | #define I2C_RETRY (-2000) /* an error has occurred retry transmit */ |
| 26 | |
| 27 | /* ICR initialize bit values |
| 28 | * |
| 29 | * 15. FM 0 (100 Khz operation) |
| 30 | * 14. UR 0 (No unit reset) |
| 31 | * 13. SADIE 0 (Disables the unit from interrupting on slave addresses |
| 32 | * matching its slave address) |
| 33 | * 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration |
| 34 | * in master mode) |
| 35 | * 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode) |
| 36 | * 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent) |
| 37 | * 9. IRFIE 1 (Enable interrupts from full buffer received) |
| 38 | * 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty) |
| 39 | * 7. GCD 1 (Disables i2c unit response to general call messages as a slave) |
| 40 | * 6. IUE 0 (Disable unit until we change settings) |
| 41 | * 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL) |
| 42 | * 4. MA 0 (Only send stop with the ICR stop bit) |
| 43 | * 3. TB 0 (We are not transmitting a byte initially) |
| 44 | * 2. ACKNAK 0 (Send an ACK after the unit receives a byte) |
| 45 | * 1. STOP 0 (Do not send a STOP) |
| 46 | * 0. START 0 (Do not send a START) |
| 47 | * |
| 48 | */ |
| 49 | #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) |
| 50 | |
| 51 | /* I2C status register init values |
| 52 | * |
| 53 | * 10. BED 1 (Clear bus error detected) |
| 54 | * 9. SAD 1 (Clear slave address detected) |
| 55 | * 7. IRF 1 (Clear IDBR Receive Full) |
| 56 | * 6. ITE 1 (Clear IDBR Transmit Empty) |
| 57 | * 5. ALD 1 (Clear Arbitration Loss Detected) |
| 58 | * 4. SSD 1 (Clear Slave Stop Detected) |
| 59 | */ |
| 60 | #define I2C_ISR_INIT 0x7FF /* status register init */ |
| 61 | |
| 62 | struct i2c_slave_client; |
| 63 | |
| 64 | struct i2c_pxa_platform_data { |
| 65 | unsigned int slave_addr; |
| 66 | struct i2c_slave_client *slave; |
| Matej Kenda | a79220b | 2007-03-05 13:06:40 +0100 | [diff] [blame] | 67 | unsigned int class; |
| Russell King | b652b43 | 2005-06-15 12:38:14 +0100 | [diff] [blame] | 68 | }; |
| 69 | |
| 70 | extern void pxa_set_i2c_info(struct i2c_pxa_platform_data *info); |
| 71 | #endif |