debuggers.hg

view tools/ioemu/hw/smbus_eeprom.c @ 0:7d21f7218375

Exact replica of unstable on 051908 + README-this
author Mukesh Rathor
date Mon May 19 15:34:57 2008 -0700 (2008-05-19)
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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 */
25 #include "vl.h"
27 //#define DEBUG
29 typedef struct SMBusEEPROMDevice {
30 SMBusDevice dev;
31 uint8_t *data;
32 uint8_t offset;
33 } SMBusEEPROMDevice;
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 }
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 }
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 }
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 }
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 }
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 }