b647f55420
The call op requests that the callee pass a message to the underlying HW or device, wait for a response, and then pass back the response error code and message to the callee. It is useful for drivers that represent some kind of messaging or IPC channel to a remote device. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
|
|
* Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _MISC_H_
|
|
#define _MISC_H_
|
|
|
|
/*
|
|
* Read the device to buffer, optional.
|
|
*
|
|
* @dev: the device
|
|
* @offset: offset to read the device
|
|
* @buf: pointer to data buffer
|
|
* @size: data size in bytes to read the device
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int misc_read(struct udevice *dev, int offset, void *buf, int size);
|
|
/*
|
|
* Write buffer to the device, optional.
|
|
*
|
|
* @dev: the device
|
|
* @offset: offset to write the device
|
|
* @buf: pointer to data buffer
|
|
* @size: data size in bytes to write the device
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int misc_write(struct udevice *dev, int offset, void *buf, int size);
|
|
/*
|
|
* Assert command to the device, optional.
|
|
*
|
|
* @dev: the device
|
|
* @request: command to be sent to the device
|
|
* @buf: pointer to buffer related to the request
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int misc_ioctl(struct udevice *dev, unsigned long request, void *buf);
|
|
|
|
/*
|
|
* Send a message to the device and wait for a response.
|
|
*
|
|
* The caller provides the message type/ID and payload to be sent.
|
|
* The callee constructs any message header required, transmits it to the
|
|
* target, waits for a response, checks any error code in the response,
|
|
* strips any message header from the response, and returns the error code
|
|
* (or a parsed version of it) and the response message payload.
|
|
*
|
|
* @dev: the device.
|
|
* @msgid: the message ID/number to send.
|
|
* tx_msg: the request/transmit message payload.
|
|
* tx_size: the size of the buffer pointed at by tx_msg.
|
|
* rx_msg: the buffer to receive the response message payload. May be NULL if
|
|
* the caller only cares about the error code.
|
|
* rx_size: the size of the buffer pointed at by rx_msg.
|
|
* @return the response message size if OK, -ve on error
|
|
*/
|
|
int misc_call(struct udevice *dev, int msgid, void *tx_msg, int tx_size,
|
|
void *rx_msg, int rx_size);
|
|
|
|
/*
|
|
* struct misc_ops - Driver model Misc operations
|
|
*
|
|
* The uclass interface is implemented by all miscellaneous devices which
|
|
* use driver model.
|
|
*/
|
|
struct misc_ops {
|
|
/*
|
|
* Read the device to buffer, optional.
|
|
*
|
|
* @dev: the device
|
|
* @offset: offset to read the device
|
|
* @buf: pointer to data buffer
|
|
* @size: data size in bytes to read the device
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int (*read)(struct udevice *dev, int offset, void *buf, int size);
|
|
/*
|
|
* Write buffer to the device, optional.
|
|
*
|
|
* @dev: the device
|
|
* @offset: offset to write the device
|
|
* @buf: pointer to data buffer
|
|
* @size: data size in bytes to write the device
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int (*write)(struct udevice *dev, int offset, const void *buf,
|
|
int size);
|
|
/*
|
|
* Assert command to the device, optional.
|
|
*
|
|
* @dev: the device
|
|
* @request: command to be sent to the device
|
|
* @buf: pointer to buffer related to the request
|
|
* @return: 0 if OK, -ve on error
|
|
*/
|
|
int (*ioctl)(struct udevice *dev, unsigned long request, void *buf);
|
|
/*
|
|
* Send a message to the device and wait for a response.
|
|
*
|
|
* @dev: the device
|
|
* @msgid: the message ID/number to send
|
|
* tx_msg: the request/transmit message payload
|
|
* tx_size: the size of the buffer pointed at by tx_msg
|
|
* rx_msg: the buffer to receive the response message payload. May be
|
|
* NULL if the caller only cares about the error code.
|
|
* rx_size: the size of the buffer pointed at by rx_msg
|
|
* @return the response message size if OK, -ve on error
|
|
*/
|
|
int (*call)(struct udevice *dev, int msgid, void *tx_msg, int tx_size,
|
|
void *rx_msg, int rx_size);
|
|
};
|
|
|
|
#endif /* _MISC_H_ */
|