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/*
* auxbus.h
*
* Copyright (C)2014 : GreenSocs Ltd
* http://www.greensocs.com/ , email: info@greensocs.com
*
* Developed by :
* Frederic Konrad <fred.konrad@greensocs.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option)any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef HW_MISC_AUXBUS_H
#define HW_MISC_AUXBUS_H
#include "exec/memory.h"
#include "hw/qdev-core.h"
typedef struct AUXBus AUXBus;
typedef struct AUXSlave AUXSlave;
typedef enum AUXCommand AUXCommand;
typedef enum AUXReply AUXReply;
#define TYPE_AUXTOI2C "aux-to-i2c-bridge"
typedef struct AUXTOI2CState AUXTOI2CState;
#define AUXTOI2C(obj) OBJECT_CHECK(AUXTOI2CState, (obj), TYPE_AUXTOI2C)
enum AUXCommand {
WRITE_I2C = 0,
READ_I2C = 1,
WRITE_I2C_STATUS = 2,
WRITE_I2C_MOT = 4,
READ_I2C_MOT = 5,
WRITE_AUX = 8,
READ_AUX = 9
};
enum AUXReply {
AUX_I2C_ACK = 0,
AUX_NACK = 1,
AUX_DEFER = 2,
AUX_I2C_NACK = 4,
AUX_I2C_DEFER = 8
};
#define TYPE_AUX_BUS "aux-bus"
#define AUX_BUS(obj) OBJECT_CHECK(AUXBus, (obj), TYPE_AUX_BUS)
struct AUXBus {
/* < private > */
BusState qbus;
/* < public > */
AUXSlave *current_dev;
AUXSlave *dev;
uint32_t last_i2c_address;
AUXCommand last_transaction;
AUXTOI2CState *bridge;
MemoryRegion *aux_io;
AddressSpace aux_addr_space;
};
#define TYPE_AUX_SLAVE "aux-slave"
#define AUX_SLAVE(obj) \
OBJECT_CHECK(AUXSlave, (obj), TYPE_AUX_SLAVE)
struct AUXSlave {
/* < private > */
DeviceState parent_obj;
/* < public > */
MemoryRegion *mmio;
};
/**
* aux_bus_init: Initialize an AUX bus.
*
* Returns the new AUX bus created.
*
* @parent The device where this bus is located.
* @name The name of the bus.
*/
AUXBus *aux_bus_init(DeviceState *parent, const char *name);
/**
* aux_bus_realize: Realize an AUX bus.
*
* @bus: The AUX bus.
*/
void aux_bus_realize(AUXBus *bus);
/*
* aux_request: Make a request on the bus.
*
* Returns the reply of the request.
*
* @bus Ths bus where the request happen.
* @cmd The command requested.
* @address The 20bits address of the slave.
* @len The length of the read or write.
* @data The data array which will be filled or read during transfer.
*/
AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
uint8_t len, uint8_t *data);
/*
* aux_get_i2c_bus: Get the i2c bus for I2C over AUX command.
*
* Returns the i2c bus associated to this AUX bus.
*
* @bus The AUX bus.
*/
I2CBus *aux_get_i2c_bus(AUXBus *bus);
/*
* aux_init_mmio: Init an mmio for an AUX slave.
*
* @aux_slave The AUX slave.
* @mmio The mmio to be registered.
*/
void aux_init_mmio(AUXSlave *aux_slave, MemoryRegion *mmio);
/* aux_map_slave: Map the mmio for an AUX slave on the bus.
*
* @dev The AUX slave.
* @addr The address for the slave's mmio.
*/
void aux_map_slave(AUXSlave *dev, hwaddr addr);
#endif /* HW_MISC_AUXBUS_H */
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