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