1 /* 2 * i.MX I2C Bus Serial Interface registers definition 3 * 4 * Copyright (C) 2013 Jean-Christophe Dubois. <jcd@tribudubois.net> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #ifndef IMX_I2C_H 22 #define IMX_I2C_H 23 24 #include "hw/sysbus.h" 25 26 #define TYPE_IMX_I2C "imx.i2c" 27 #define IMX_I2C(obj) OBJECT_CHECK(IMXI2CState, (obj), TYPE_IMX_I2C) 28 29 #define IMX_I2C_MEM_SIZE 0x14 30 31 /* i.MX I2C memory map */ 32 #define IADR_ADDR 0x00 /* address register */ 33 #define IFDR_ADDR 0x04 /* frequency divider register */ 34 #define I2CR_ADDR 0x08 /* control register */ 35 #define I2SR_ADDR 0x0c /* status register */ 36 #define I2DR_ADDR 0x10 /* data register */ 37 38 #define IADR_MASK 0xFE 39 #define IADR_RESET 0 40 41 #define IFDR_MASK 0x3F 42 #define IFDR_RESET 0 43 44 #define I2CR_IEN (1 << 7) 45 #define I2CR_IIEN (1 << 6) 46 #define I2CR_MSTA (1 << 5) 47 #define I2CR_MTX (1 << 4) 48 #define I2CR_TXAK (1 << 3) 49 #define I2CR_RSTA (1 << 2) 50 #define I2CR_MASK 0xFC 51 #define I2CR_RESET 0 52 53 #define I2SR_ICF (1 << 7) 54 #define I2SR_IAAF (1 << 6) 55 #define I2SR_IBB (1 << 5) 56 #define I2SR_IAL (1 << 4) 57 #define I2SR_SRW (1 << 2) 58 #define I2SR_IIF (1 << 1) 59 #define I2SR_RXAK (1 << 0) 60 #define I2SR_MASK 0xE9 61 #define I2SR_RESET 0x81 62 63 #define I2DR_MASK 0xFF 64 #define I2DR_RESET 0 65 66 #define ADDR_RESET 0xFF00 67 68 typedef struct IMXI2CState { 69 /*< private >*/ 70 SysBusDevice parent_obj; 71 72 /*< public >*/ 73 MemoryRegion iomem; 74 I2CBus *bus; 75 qemu_irq irq; 76 77 uint16_t address; 78 79 uint16_t iadr; 80 uint16_t ifdr; 81 uint16_t i2cr; 82 uint16_t i2sr; 83 uint16_t i2dr_read; 84 uint16_t i2dr_write; 85 } IMXI2CState; 86 87 #endif /* IMX_I2C_H */ 88