Archipelago » qemu

/*

 * QEMU SMBus EEPROM device

 * 

 * Copyright (c) 2007 Arastra, Inc.

 * 

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include "vl.h"

//#define DEBUG

typedef struct SMBusEEPROMDevice {

    SMBusDevice dev;

    uint8_t *data;

    uint8_t offset;

} SMBusEEPROMDevice;

static void eeprom_quick_cmd(SMBusDevice *dev, uint8_t read)

{

#ifdef DEBUG

    printf("eeprom_quick_cmd: addr=0x%02x read=%d\n", dev->addr, read);

#endif

}

static void eeprom_send_byte(SMBusDevice *dev, uint8_t val)

{

    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;

#ifdef DEBUG

    printf("eeprom_send_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);

#endif

    eeprom->offset = val;

}

static uint8_t eeprom_receive_byte(SMBusDevice *dev)

{

    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;

    uint8_t val = eeprom->data[eeprom->offset++];

#ifdef DEBUG

    printf("eeprom_receive_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);

#endif

    return val;

}

static void eeprom_write_byte(SMBusDevice *dev, uint8_t cmd, uint8_t val)

{

    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;

#ifdef DEBUG

    printf("eeprom_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,

           cmd, val);

#endif

    eeprom->data[cmd] = val;

}

static uint8_t eeprom_read_byte(SMBusDevice *dev, uint8_t cmd)

{

    SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;

    uint8_t val = eeprom->data[cmd];

#ifdef DEBUG

    printf("eeprom_read_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,

           cmd, val);

#endif

    return val;

}

SMBusDevice *smbus_eeprom_device_init(uint8_t addr, uint8_t *buf)

{

    SMBusEEPROMDevice *eeprom = qemu_mallocz(sizeof(SMBusEEPROMDevice));

    eeprom->dev.addr = addr;

    eeprom->dev.quick_cmd = eeprom_quick_cmd;

    eeprom->dev.send_byte = eeprom_send_byte;

    eeprom->dev.receive_byte = eeprom_receive_byte;

    eeprom->dev.write_byte = eeprom_write_byte;

    eeprom->dev.read_byte = eeprom_read_byte;

    eeprom->data = buf;

    eeprom->offset = 0;

    return (SMBusDevice *) eeprom;

}