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Annotation of qemu/hw/smbus_eeprom.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * QEMU SMBus EEPROM device
        !             3:  * 
        !             4:  * Copyright (c) 2007 Arastra, Inc.
        !             5:  * 
        !             6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             7:  * of this software and associated documentation files (the "Software"), to deal
        !             8:  * in the Software without restriction, including without limitation the rights
        !             9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        !            10:  * copies of the Software, and to permit persons to whom the Software is
        !            11:  * furnished to do so, subject to the following conditions:
        !            12:  *
        !            13:  * The above copyright notice and this permission notice shall be included in
        !            14:  * all copies or substantial portions of the Software.
        !            15:  *
        !            16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
        !            19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        !            21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
        !            22:  * THE SOFTWARE.
        !            23:  */
        !            24: 
        !            25: #include "vl.h"
        !            26: 
        !            27: //#define DEBUG
        !            28: 
        !            29: typedef struct SMBusEEPROMDevice {
        !            30:     SMBusDevice dev;
        !            31:     uint8_t *data;
        !            32:     uint8_t offset;
        !            33: } SMBusEEPROMDevice;
        !            34: 
        !            35: static void eeprom_quick_cmd(SMBusDevice *dev, uint8_t read)
        !            36: {
        !            37: #ifdef DEBUG
        !            38:     printf("eeprom_quick_cmd: addr=0x%02x read=%d\n", dev->addr, read);
        !            39: #endif
        !            40: }
        !            41: 
        !            42: static void eeprom_send_byte(SMBusDevice *dev, uint8_t val)
        !            43: {
        !            44:     SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
        !            45: #ifdef DEBUG
        !            46:     printf("eeprom_send_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);
        !            47: #endif
        !            48:     eeprom->offset = val;
        !            49: }
        !            50: 
        !            51: static uint8_t eeprom_receive_byte(SMBusDevice *dev)
        !            52: {
        !            53:     SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
        !            54:     uint8_t val = eeprom->data[eeprom->offset++];
        !            55: #ifdef DEBUG
        !            56:     printf("eeprom_receive_byte: addr=0x%02x val=0x%02x\n", dev->addr, val);
        !            57: #endif
        !            58:     return val;
        !            59: }
        !            60: 
        !            61: static void eeprom_write_byte(SMBusDevice *dev, uint8_t cmd, uint8_t val)
        !            62: {
        !            63:     SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
        !            64: #ifdef DEBUG
        !            65:     printf("eeprom_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,
        !            66:            cmd, val);
        !            67: #endif
        !            68:     eeprom->data[cmd] = val;
        !            69: }
        !            70: 
        !            71: static uint8_t eeprom_read_byte(SMBusDevice *dev, uint8_t cmd)
        !            72: {
        !            73:     SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
        !            74:     uint8_t val = eeprom->data[cmd];
        !            75: #ifdef DEBUG
        !            76:     printf("eeprom_read_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev->addr,
        !            77:            cmd, val);
        !            78: #endif
        !            79:     return val;
        !            80: }
        !            81: 
        !            82: SMBusDevice *smbus_eeprom_device_init(uint8_t addr, uint8_t *buf)
        !            83: {
        !            84:     SMBusEEPROMDevice *eeprom = qemu_mallocz(sizeof(SMBusEEPROMDevice));
        !            85:     eeprom->dev.addr = addr;
        !            86:     eeprom->dev.quick_cmd = eeprom_quick_cmd;
        !            87:     eeprom->dev.send_byte = eeprom_send_byte;
        !            88:     eeprom->dev.receive_byte = eeprom_receive_byte;
        !            89:     eeprom->dev.write_byte = eeprom_write_byte;
        !            90:     eeprom->dev.read_byte = eeprom_read_byte;
        !            91:     eeprom->data = buf;
        !            92:     eeprom->offset = 0;
        !            93:     return (SMBusDevice *) eeprom;
        !            94: }

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