| Lei Wen | 3df619e | 2011-04-13 23:48:31 +0530 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2011 |
| 3 | * Marvell Inc, <www.marvell.com> |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #ifndef _MV_I2C_H_ |
| 25 | #define _MV_I2C_H_ |
| 26 | extern void i2c_clk_enable(void); |
| 27 | |
| 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 |
| 32 | |
| 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 |
| 37 | |
| 38 | /* Specify who shall transfer the data (master or slave) */ |
| 39 | #define I2C_READ 0 |
| 40 | #define I2C_WRITE 1 |
| 41 | |
| 42 | #if (CONFIG_SYS_I2C_SPEED == 400000) |
| 43 | #define I2C_ICR_INIT (ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD \ |
| 44 | | ICR_SCLE) |
| 45 | #else |
| 46 | #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) |
| 47 | #endif |
| 48 | |
| 49 | #define I2C_ISR_INIT 0x7FF |
| 50 | /* ----- Control register bits ---------------------------------------- */ |
| 51 | |
| 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 */ |
| 68 | |
| 69 | /* ----- Status register bits ----------------------------------------- */ |
| 70 | |
| 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 */ |
| 82 | |
| 83 | #endif |