include/hw/i2c/aspeed_i2c.h

   1 /*
   2  *  ASPEED AST2400 I2C Controller
   3  *
   4  *  Copyright (C) 2016 IBM Corp.
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the 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,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License along
  17  *  with this program; if not, write to the Free Software Foundation, Inc.,
  18  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #ifndef ASPEED_I2C_H
  22 #define ASPEED_I2C_H
  23
  24 #include "hw/i2c/i2c.h"
  25 #include "hw/sysbus.h"
  26
  27 #define TYPE_ASPEED_I2C "aspeed.i2c"
  28 #define TYPE_ASPEED_2400_I2C TYPE_ASPEED_I2C "-ast2400"
  29 #define TYPE_ASPEED_2500_I2C TYPE_ASPEED_I2C "-ast2500"
  30 #define TYPE_ASPEED_2600_I2C TYPE_ASPEED_I2C "-ast2600"
  31 #define ASPEED_I2C(obj) \
  32     OBJECT_CHECK(AspeedI2CState, (obj), TYPE_ASPEED_I2C)
  33
  34 #define ASPEED_I2C_NR_BUSSES 16
  35 #define ASPEED_I2C_MAX_POOL_SIZE 0x800
  36
  37 struct AspeedI2CState;
  38
  39 typedef struct AspeedI2CBus {
  40     struct AspeedI2CState *controller;
  41
  42     MemoryRegion mr;
  43
  44     I2CBus *bus;
  45     uint8_t id;
  46     qemu_irq irq;
  47
  48     uint32_t ctrl;
  49     uint32_t timing[2];
  50     uint32_t intr_ctrl;
  51     uint32_t intr_status;
  52     uint32_t cmd;
  53     uint32_t buf;
  54     uint32_t pool_ctrl;
  55     uint32_t dma_addr;
  56     uint32_t dma_len;
  57 } AspeedI2CBus;
  58
  59 typedef struct AspeedI2CState {
  60     SysBusDevice parent_obj;
  61
  62     MemoryRegion iomem;
  63     qemu_irq irq;
  64
  65     uint32_t intr_status;
  66     uint32_t ctrl_global;
  67     MemoryRegion pool_iomem;
  68     uint8_t pool[ASPEED_I2C_MAX_POOL_SIZE];
  69
  70     AspeedI2CBus busses[ASPEED_I2C_NR_BUSSES];
  71     MemoryRegion *dram_mr;
  72     AddressSpace dram_as;
  73 } AspeedI2CState;
  74
  75 #define ASPEED_I2C_CLASS(klass) \
  76      OBJECT_CLASS_CHECK(AspeedI2CClass, (klass), TYPE_ASPEED_I2C)
  77 #define ASPEED_I2C_GET_CLASS(obj) \
  78      OBJECT_GET_CLASS(AspeedI2CClass, (obj), TYPE_ASPEED_I2C)
  79
  80 typedef struct AspeedI2CClass {
  81     SysBusDeviceClass parent_class;
  82
  83     uint8_t num_busses;
  84     uint8_t reg_size;
  85     uint8_t gap;
  86     qemu_irq (*bus_get_irq)(AspeedI2CBus *);
  87
  88     uint64_t pool_size;
  89     hwaddr pool_base;
  90     uint8_t *(*bus_pool_base)(AspeedI2CBus *);
  91     bool check_sram;
  92     bool has_dma;
  93
  94 } AspeedI2CClass;
  95
  96 I2CBus *aspeed_i2c_get_bus(DeviceState *dev, int busnr);
  97
  98 #endif /* ASPEED_I2C_H */