1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2004-2014
4 * Texas Instruments, <www.ti.com>
6 * Some changes copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
8 #ifndef _DAVINCI_I2C_H_
9 #define _DAVINCI_I2C_H_
32 /* I2C Interrupt Enable Register (I2C_IE): */
33 #define I2C_IE_SCD_IE (1 << 5) /* Stop condition detect interrupt enable */
34 #define I2C_IE_XRDY_IE (1 << 4) /* Transmit data ready interrupt enable */
35 #define I2C_IE_RRDY_IE (1 << 3) /* Receive data ready interrupt enable */
36 #define I2C_IE_ARDY_IE (1 << 2) /* Register access ready interrupt enable */
37 #define I2C_IE_NACK_IE (1 << 1) /* No acknowledgment interrupt enable */
38 #define I2C_IE_AL_IE (1 << 0) /* Arbitration lost interrupt enable */
40 /* I2C Status Register (I2C_STAT): */
42 #define I2C_STAT_BB (1 << 12) /* Bus busy */
43 #define I2C_STAT_ROVR (1 << 11) /* Receive overrun */
44 #define I2C_STAT_XUDF (1 << 10) /* Transmit underflow */
45 #define I2C_STAT_AAS (1 << 9) /* Address as slave */
46 #define I2C_STAT_SCD (1 << 5) /* Stop condition detect */
47 #define I2C_STAT_XRDY (1 << 4) /* Transmit data ready */
48 #define I2C_STAT_RRDY (1 << 3) /* Receive data ready */
49 #define I2C_STAT_ARDY (1 << 2) /* Register access ready */
50 #define I2C_STAT_NACK (1 << 1) /* No acknowledgment interrupt enable */
51 #define I2C_STAT_AL (1 << 0) /* Arbitration lost interrupt enable */
53 /* I2C Interrupt Code Register (I2C_INTCODE): */
55 #define I2C_INTCODE_MASK 7
56 #define I2C_INTCODE_NONE 0
57 #define I2C_INTCODE_AL 1 /* Arbitration lost */
58 #define I2C_INTCODE_NAK 2 /* No acknowledgement/general call */
59 #define I2C_INTCODE_ARDY 3 /* Register access ready */
60 #define I2C_INTCODE_RRDY 4 /* Rcv data ready */
61 #define I2C_INTCODE_XRDY 5 /* Xmit data ready */
62 #define I2C_INTCODE_SCD 6 /* Stop condition detect */
64 /* I2C Configuration Register (I2C_CON): */
66 #define I2C_CON_EN (1 << 5) /* I2C module enable */
67 #define I2C_CON_STB (1 << 4) /* Start byte mode (master mode only) */
68 #define I2C_CON_MST (1 << 10) /* Master/slave mode */
69 #define I2C_CON_TRX (1 << 9) /* Tx/Rx mode (master mode only) */
70 #define I2C_CON_XA (1 << 8) /* Expand address */
71 #define I2C_CON_STP (1 << 11) /* Stop condition (master mode only) */
72 #define I2C_CON_STT (1 << 13) /* Start condition (master mode only) */
73 #define I2C_CON_FREE (1 << 14) /* Free run on emulation */
75 #define I2C_TIMEOUT 0xffff0000 /* Timeout mask for poll_i2c_irq() */