81a322d4a1
Sorry folks, but it has to be. One more of these invasive qdev patches. We have a serious design bug in the qdev interface: device init callbacks can't signal failure because the init() callback has no return value. This patch fixes it. We have already one case in-tree where this is needed: Try -device virtio-blk-pci (without drive= specified) and watch qemu segfault. This patch fixes it. With usb+scsi being converted to qdev we'll get more devices where the init callback can fail for various reasons. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
69 lines
3.0 KiB
C
69 lines
3.0 KiB
C
/*
|
|
* QEMU SMBus API
|
|
*
|
|
* 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 "i2c.h"
|
|
|
|
struct SMBusDevice {
|
|
/* The SMBus protocol is implemented on top of I2C. */
|
|
i2c_slave i2c;
|
|
|
|
/* Remaining fields for internal use only. */
|
|
int mode;
|
|
int data_len;
|
|
uint8_t data_buf[34]; /* command + len + 32 bytes of data. */
|
|
uint8_t command;
|
|
};
|
|
|
|
typedef struct {
|
|
I2CSlaveInfo i2c;
|
|
int (*init)(SMBusDevice *dev);
|
|
void (*quick_cmd)(SMBusDevice *dev, uint8_t read);
|
|
void (*send_byte)(SMBusDevice *dev, uint8_t val);
|
|
uint8_t (*receive_byte)(SMBusDevice *dev);
|
|
/* We can't distinguish between a word write and a block write with
|
|
length 1, so pass the whole data block including the length byte
|
|
(if present). The device is responsible figuring out what type of
|
|
command this is. */
|
|
void (*write_data)(SMBusDevice *dev, uint8_t cmd, uint8_t *buf, int len);
|
|
/* Likewise we can't distinguish between different reads, or even know
|
|
the length of the read until the read is complete, so read data a
|
|
byte at a time. The device is responsible for adding the length
|
|
byte on block reads. */
|
|
uint8_t (*read_data)(SMBusDevice *dev, uint8_t cmd, int n);
|
|
} SMBusDeviceInfo;
|
|
|
|
void smbus_register_device(SMBusDeviceInfo *info);
|
|
|
|
/* Master device commands. */
|
|
void smbus_quick_command(i2c_bus *bus, int addr, int read);
|
|
uint8_t smbus_receive_byte(i2c_bus *bus, int addr);
|
|
void smbus_send_byte(i2c_bus *bus, int addr, uint8_t data);
|
|
uint8_t smbus_read_byte(i2c_bus *bus, int addr, uint8_t command);
|
|
void smbus_write_byte(i2c_bus *bus, int addr, uint8_t command, uint8_t data);
|
|
uint16_t smbus_read_word(i2c_bus *bus, int addr, uint8_t command);
|
|
void smbus_write_word(i2c_bus *bus, int addr, uint8_t command, uint16_t data);
|
|
int smbus_read_block(i2c_bus *bus, int addr, uint8_t command, uint8_t *data);
|
|
void smbus_write_block(i2c_bus *bus, int addr, uint8_t command, uint8_t *data,
|
|
int len);
|