qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

auxbus.h (3391B)

      1 /*
      2  * auxbus.h
      3  *
      4  *  Copyright (C)2014 : GreenSocs Ltd
      5  *      http://www.greensocs.com/ , email: info@greensocs.com
      6  *
      7  *  Developed by :
      8  *  Frederic Konrad   <fred.konrad@greensocs.com>
      9  *
     10  * This program is free software; you can redistribute it and/or modify
     11  * it under the terms of the GNU General Public License as published by
     12  * the Free Software Foundation, either version 2 of the License, or
     13  * (at your option)any later version.
     14  *
     15  * This program is distributed in the hope that it will be useful,
     16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     18  * GNU General Public License for more details.
     19  *
     20  * You should have received a copy of the GNU General Public License along
     21  * with this program; if not, see <http://www.gnu.org/licenses/>.
     22  *
     23  */
     24 
     25 #ifndef HW_MISC_AUXBUS_H
     26 #define HW_MISC_AUXBUS_H
     27 
     28 #include "exec/memory.h"
     29 #include "hw/qdev-core.h"
     30 #include "qom/object.h"
     31 
     32 typedef struct AUXSlave AUXSlave;
     33 typedef enum AUXCommand AUXCommand;
     34 typedef enum AUXReply AUXReply;
     35 
     36 #define TYPE_AUXTOI2C "aux-to-i2c-bridge"
     37 OBJECT_DECLARE_SIMPLE_TYPE(AUXTOI2CState, AUXTOI2C)
     38 
     39 enum AUXCommand {
     40     WRITE_I2C = 0,
     41     READ_I2C = 1,
     42     WRITE_I2C_STATUS = 2,
     43     WRITE_I2C_MOT = 4,
     44     READ_I2C_MOT = 5,
     45     WRITE_AUX = 8,
     46     READ_AUX = 9
     47 };
     48 
     49 enum AUXReply {
     50     AUX_I2C_ACK = 0,
     51     AUX_NACK = 1,
     52     AUX_DEFER = 2,
     53     AUX_I2C_NACK = 4,
     54     AUX_I2C_DEFER = 8
     55 };
     56 
     57 #define TYPE_AUX_BUS "aux-bus"
     58 OBJECT_DECLARE_SIMPLE_TYPE(AUXBus, AUX_BUS)
     59 
     60 struct AUXBus {
     61     /* < private > */
     62     BusState qbus;
     63 
     64     /* < public > */
     65     AUXSlave *current_dev;
     66     AUXSlave *dev;
     67     uint32_t last_i2c_address;
     68     AUXCommand last_transaction;
     69 
     70     AUXTOI2CState *bridge;
     71 
     72     MemoryRegion *aux_io;
     73     AddressSpace aux_addr_space;
     74 };
     75 
     76 #define TYPE_AUX_SLAVE "aux-slave"
     77 OBJECT_DECLARE_SIMPLE_TYPE(AUXSlave, AUX_SLAVE)
     78 
     79 struct AUXSlave {
     80     /* < private > */
     81     DeviceState parent_obj;
     82 
     83     /* < public > */
     84     MemoryRegion *mmio;
     85 };
     86 
     87 /**
     88  * aux_bus_init: Initialize an AUX bus.
     89  *
     90  * Returns the new AUX bus created.
     91  *
     92  * @parent The device where this bus is located.
     93  * @name The name of the bus.
     94  */
     95 AUXBus *aux_bus_init(DeviceState *parent, const char *name);
     96 
     97 /**
     98  * aux_bus_realize: Realize an AUX bus.
     99  *
    100  * @bus: The AUX bus.
    101  */
    102 void aux_bus_realize(AUXBus *bus);
    103 
    104 /*
    105  * aux_request: Make a request on the bus.
    106  *
    107  * Returns the reply of the request.
    108  *
    109  * @bus Ths bus where the request happen.
    110  * @cmd The command requested.
    111  * @address The 20bits address of the slave.
    112  * @len The length of the read or write.
    113  * @data The data array which will be filled or read during transfer.
    114  */
    115 AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
    116                               uint8_t len, uint8_t *data);
    117 
    118 /*
    119  * aux_get_i2c_bus: Get the i2c bus for I2C over AUX command.
    120  *
    121  * Returns the i2c bus associated to this AUX bus.
    122  *
    123  * @bus The AUX bus.
    124  */
    125 I2CBus *aux_get_i2c_bus(AUXBus *bus);
    126 
    127 /*
    128  * aux_init_mmio: Init an mmio for an AUX slave.
    129  *
    130  * @aux_slave The AUX slave.
    131  * @mmio The mmio to be registered.
    132  */
    133 void aux_init_mmio(AUXSlave *aux_slave, MemoryRegion *mmio);
    134 
    135 /* aux_map_slave: Map the mmio for an AUX slave on the bus.
    136  *
    137  * @dev The AUX slave.
    138  * @addr The address for the slave's mmio.
    139  */
    140 void aux_map_slave(AUXSlave *dev, hwaddr addr);
    141 
    142 #endif /* HW_MISC_AUXBUS_H */