mv_i2c.h
2.38 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
/*
* (C) Copyright 2011
* Marvell Inc, <www.marvell.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _MV_I2C_H_
#define _MV_I2C_H_
extern void i2c_clk_enable(void);
/* Shall the current transfer have a start/stop condition? */
#define I2C_COND_NORMAL 0
#define I2C_COND_START 1
#define I2C_COND_STOP 2
/* Shall the current transfer be ack/nacked or being waited for it? */
#define I2C_ACKNAK_WAITACK 1
#define I2C_ACKNAK_SENDACK 2
#define I2C_ACKNAK_SENDNAK 4
/* Specify who shall transfer the data (master or slave) */
#define I2C_READ 0
#define I2C_WRITE 1
#define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
#define I2C_ISR_INIT 0x7FF
/* ----- Control register bits ---------------------------------------- */
#define ICR_START 0x1 /* start bit */
#define ICR_STOP 0x2 /* stop bit */
#define ICR_ACKNAK 0x4 /* send ACK(0) or NAK(1) */
#define ICR_TB 0x8 /* transfer byte bit */
#define ICR_MA 0x10 /* master abort */
#define ICR_SCLE 0x20 /* master clock enable, mona SCLEA */
#define ICR_IUE 0x40 /* unit enable */
#define ICR_GCD 0x80 /* general call disable */
#define ICR_ITEIE 0x100 /* enable tx interrupts */
#define ICR_IRFIE 0x200 /* enable rx interrupts, mona: DRFIE */
#define ICR_BEIE 0x400 /* enable bus error ints */
#define ICR_SSDIE 0x800 /* slave STOP detected int enable */
#define ICR_ALDIE 0x1000 /* enable arbitration interrupt */
#define ICR_SADIE 0x2000 /* slave address detected int enable */
#define ICR_UR 0x4000 /* unit reset */
#ifdef CONFIG_ARMADA_3700
#define ICR_SM 0x00000 /* Standard Mode */
#define ICR_FM 0x10000 /* Fast Mode */
#define ICR_MODE_MASK 0x30000 /* Mode mask */
#else
#define ICR_SM 0x00000 /* Standard Mode */
#define ICR_FM 0x08000 /* Fast Mode */
#define ICR_MODE_MASK 0x18000 /* Mode mask */
#endif
/* ----- Status register bits ----------------------------------------- */
#define ISR_RWM 0x1 /* read/write mode */
#define ISR_ACKNAK 0x2 /* ack/nak status */
#define ISR_UB 0x4 /* unit busy */
#define ISR_IBB 0x8 /* bus busy */
#define ISR_SSD 0x10 /* slave stop detected */
#define ISR_ALD 0x20 /* arbitration loss detected */
#define ISR_ITE 0x40 /* tx buffer empty */
#define ISR_IRF 0x80 /* rx buffer full */
#define ISR_GCAD 0x100 /* general call address detected */
#define ISR_SAD 0x200 /* slave address detected */
#define ISR_BED 0x400 /* bus error no ACK/NAK */
#endif