074f2fff79
Rationale: move device information from code to data structures. v2: Adapt the drivers missed in the first version. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/*
|
|
* 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 "hw.h"
|
|
#include "i2c.h"
|
|
#include "smbus.h"
|
|
|
|
//#define DEBUG
|
|
|
|
typedef struct SMBusEEPROMDevice {
|
|
SMBusDevice smbusdev;
|
|
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->i2c.address, 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->i2c.address, 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->i2c.address, val);
|
|
#endif
|
|
return val;
|
|
}
|
|
|
|
static void eeprom_write_data(SMBusDevice *dev, uint8_t cmd, uint8_t *buf, int len)
|
|
{
|
|
SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
|
|
int n;
|
|
#ifdef DEBUG
|
|
printf("eeprom_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n",
|
|
dev->i2c.address, cmd, buf[0]);
|
|
#endif
|
|
/* An page write operation is not a valid SMBus command.
|
|
It is a block write without a length byte. Fortunately we
|
|
get the full block anyway. */
|
|
/* TODO: Should this set the current location? */
|
|
if (cmd + len > 256)
|
|
n = 256 - cmd;
|
|
else
|
|
n = len;
|
|
memcpy(eeprom->data + cmd, buf, n);
|
|
len -= n;
|
|
if (len)
|
|
memcpy(eeprom->data, buf + n, len);
|
|
}
|
|
|
|
static uint8_t eeprom_read_data(SMBusDevice *dev, uint8_t cmd, int n)
|
|
{
|
|
SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *) dev;
|
|
/* If this is the first byte then set the current position. */
|
|
if (n == 0)
|
|
eeprom->offset = cmd;
|
|
/* As with writes, we implement block reads without the
|
|
SMBus length byte. */
|
|
return eeprom_receive_byte(dev);
|
|
}
|
|
|
|
static void smbus_eeprom_init(SMBusDevice *dev)
|
|
{
|
|
SMBusEEPROMDevice *eeprom = (SMBusEEPROMDevice *)dev;
|
|
|
|
/* FIXME: Should be a blob rather than a ptr. */
|
|
eeprom->data = qdev_get_prop_ptr(&dev->i2c.qdev, "data");
|
|
eeprom->offset = 0;
|
|
}
|
|
|
|
static SMBusDeviceInfo smbus_eeprom_info = {
|
|
.i2c.qdev.name = "smbus-eeprom",
|
|
.i2c.qdev.size = sizeof(SMBusEEPROMDevice),
|
|
.init = smbus_eeprom_init,
|
|
.quick_cmd = eeprom_quick_cmd,
|
|
.send_byte = eeprom_send_byte,
|
|
.receive_byte = eeprom_receive_byte,
|
|
.write_data = eeprom_write_data,
|
|
.read_data = eeprom_read_data
|
|
};
|
|
|
|
static void smbus_eeprom_register_devices(void)
|
|
{
|
|
smbus_register_device(&smbus_eeprom_info);
|
|
}
|
|
|
|
device_init(smbus_eeprom_register_devices)
|