3 * Marvell Inc, <www.marvell.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 extern void i2c_clk_enable(void);
28 /* Shall the current transfer have a start/stop condition? */
29 #define I2C_COND_NORMAL 0
30 #define I2C_COND_START 1
31 #define I2C_COND_STOP 2
33 /* Shall the current transfer be ack/nacked or being waited for it? */
34 #define I2C_ACKNAK_WAITACK 1
35 #define I2C_ACKNAK_SENDACK 2
36 #define I2C_ACKNAK_SENDNAK 4
38 /* Specify who shall transfer the data (master or slave) */
42 #if (CONFIG_SYS_I2C_SPEED == 400000)
43 #define I2C_ICR_INIT (ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD \
46 #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
49 #define I2C_ISR_INIT 0x7FF
50 /* ----- Control register bits ---------------------------------------- */
52 #define ICR_START 0x1 /* start bit */
53 #define ICR_STOP 0x2 /* stop bit */
54 #define ICR_ACKNAK 0x4 /* send ACK(0) or NAK(1) */
55 #define ICR_TB 0x8 /* transfer byte bit */
56 #define ICR_MA 0x10 /* master abort */
57 #define ICR_SCLE 0x20 /* master clock enable, mona SCLEA */
58 #define ICR_IUE 0x40 /* unit enable */
59 #define ICR_GCD 0x80 /* general call disable */
60 #define ICR_ITEIE 0x100 /* enable tx interrupts */
61 #define ICR_IRFIE 0x200 /* enable rx interrupts, mona: DRFIE */
62 #define ICR_BEIE 0x400 /* enable bus error ints */
63 #define ICR_SSDIE 0x800 /* slave STOP detected int enable */
64 #define ICR_ALDIE 0x1000 /* enable arbitration interrupt */
65 #define ICR_SADIE 0x2000 /* slave address detected int enable */
66 #define ICR_UR 0x4000 /* unit reset */
67 #define ICR_FM 0x8000 /* Fast Mode */
69 /* ----- Status register bits ----------------------------------------- */
71 #define ISR_RWM 0x1 /* read/write mode */
72 #define ISR_ACKNAK 0x2 /* ack/nak status */
73 #define ISR_UB 0x4 /* unit busy */
74 #define ISR_IBB 0x8 /* bus busy */
75 #define ISR_SSD 0x10 /* slave stop detected */
76 #define ISR_ALD 0x20 /* arbitration loss detected */
77 #define ISR_ITE 0x40 /* tx buffer empty */
78 #define ISR_IRF 0x80 /* rx buffer full */
79 #define ISR_GCAD 0x100 /* general call address detected */
80 #define ISR_SAD 0x200 /* slave address detected */
81 #define ISR_BED 0x400 /* bus error no ACK/NAK */