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git.proxmox.com Git - mirror_qemu.git/blob - hw/smbus_eeprom.c
2 * QEMU SMBus EEPROM device
4 * Copyright (c) 2007 Arastra, Inc.
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
29 typedef struct SMBusEEPROMDevice
{
35 static void eeprom_quick_cmd(SMBusDevice
*dev
, uint8_t read
)
38 printf("eeprom_quick_cmd: addr=0x%02x read=%d\n", dev
->addr
, read
);
42 static void eeprom_send_byte(SMBusDevice
*dev
, uint8_t val
)
44 SMBusEEPROMDevice
*eeprom
= (SMBusEEPROMDevice
*) dev
;
46 printf("eeprom_send_byte: addr=0x%02x val=0x%02x\n", dev
->addr
, val
);
51 static uint8_t eeprom_receive_byte(SMBusDevice
*dev
)
53 SMBusEEPROMDevice
*eeprom
= (SMBusEEPROMDevice
*) dev
;
54 uint8_t val
= eeprom
->data
[eeprom
->offset
++];
56 printf("eeprom_receive_byte: addr=0x%02x val=0x%02x\n", dev
->addr
, val
);
61 static void eeprom_write_data(SMBusDevice
*dev
, uint8_t cmd
, uint8_t *buf
, int len
)
63 SMBusEEPROMDevice
*eeprom
= (SMBusEEPROMDevice
*) dev
;
66 printf("eeprom_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n", dev
->addr
,
69 /* An page write operation is not a valid SMBus command.
70 It is a block write without a length byte. Fortunately we
71 get the full block anyway. */
72 /* TODO: Should this set the current location? */
77 memcpy(eeprom
->data
+ cmd
, buf
, n
);
80 memcpy(eeprom
->data
, buf
+ n
, len
);
83 static uint8_t eeprom_read_data(SMBusDevice
*dev
, uint8_t cmd
, int n
)
85 SMBusEEPROMDevice
*eeprom
= (SMBusEEPROMDevice
*) dev
;
86 /* If this is the first byte then set the current position. */
89 /* As with writes, we implement block reads without the
91 return eeprom_receive_byte(dev
);
94 void smbus_eeprom_device_init(i2c_bus
*bus
, uint8_t addr
, uint8_t *buf
)
96 SMBusEEPROMDevice
*eeprom
;
98 eeprom
= (SMBusEEPROMDevice
*)smbus_device_init(bus
, addr
,
99 sizeof(SMBusEEPROMDevice
));
101 eeprom
->dev
.quick_cmd
= eeprom_quick_cmd
;
102 eeprom
->dev
.send_byte
= eeprom_send_byte
;
103 eeprom
->dev
.receive_byte
= eeprom_receive_byte
;
104 eeprom
->dev
.write_data
= eeprom_write_data
;
105 eeprom
->dev
.read_data
= eeprom_read_data
;