include/hw/i2c/imx_i2c.h

   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_ */