| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * i2c_pxa.h |
| * |
| * Copyright (C) 2002 Intrinsyc Software Inc. |
| */ |
| #ifndef _I2C_PXA_H_ |
| #define _I2C_PXA_H_ |
| |
| #if 0 |
| #define DEF_TIMEOUT 3 |
| #else |
| /* need a longer timeout if we're dealing with the fact we may well be |
| * looking at a multi-master environment |
| */ |
| #define DEF_TIMEOUT 32 |
| #endif |
| |
| #define BUS_ERROR (-EREMOTEIO) |
| #define XFER_NAKED (-ECONNREFUSED) |
| #define I2C_RETRY (-2000) /* an error has occurred retry transmit */ |
| |
| /* ICR initialize bit values |
| * |
| * 15. FM 0 (100 Khz operation) |
| * 14. UR 0 (No unit reset) |
| * 13. SADIE 0 (Disables the unit from interrupting on slave addresses |
| * matching its slave address) |
| * 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration |
| * in master mode) |
| * 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode) |
| * 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent) |
| * 9. IRFIE 1 (Enable interrupts from full buffer received) |
| * 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty) |
| * 7. GCD 1 (Disables i2c unit response to general call messages as a slave) |
| * 6. IUE 0 (Disable unit until we change settings) |
| * 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL) |
| * 4. MA 0 (Only send stop with the ICR stop bit) |
| * 3. TB 0 (We are not transmitting a byte initially) |
| * 2. ACKNAK 0 (Send an ACK after the unit receives a byte) |
| * 1. STOP 0 (Do not send a STOP) |
| * 0. START 0 (Do not send a START) |
| * |
| */ |
| #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) |
| |
| /* I2C status register init values |
| * |
| * 10. BED 1 (Clear bus error detected) |
| * 9. SAD 1 (Clear slave address detected) |
| * 7. IRF 1 (Clear IDBR Receive Full) |
| * 6. ITE 1 (Clear IDBR Transmit Empty) |
| * 5. ALD 1 (Clear Arbitration Loss Detected) |
| * 4. SSD 1 (Clear Slave Stop Detected) |
| */ |
| #define I2C_ISR_INIT 0x7FF /* status register init */ |
| |
| struct i2c_pxa_platform_data { |
| unsigned int class; |
| unsigned int use_pio :1; |
| unsigned int fast_mode :1; |
| unsigned int high_mode:1; |
| unsigned char master_code; |
| unsigned long rate; |
| }; |
| #endif |
