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Annotation of qemu/hw/smbus_eeprom.c, revision 1.1.1.1

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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