1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw> 4 */ 5 6 #ifndef _MISC_H_ 7 #define _MISC_H_ 8 9 /* 10 * Read the device to buffer, optional. 11 * 12 * @dev: the device 13 * @offset: offset to read the device 14 * @buf: pointer to data buffer 15 * @size: data size in bytes to read the device 16 * @return: 0 if OK, -ve on error 17 */ 18 int misc_read(struct udevice *dev, int offset, void *buf, int size); 19 /* 20 * Write buffer to the device, optional. 21 * 22 * @dev: the device 23 * @offset: offset to write the device 24 * @buf: pointer to data buffer 25 * @size: data size in bytes to write the device 26 * @return: 0 if OK, -ve on error 27 */ 28 int misc_write(struct udevice *dev, int offset, void *buf, int size); 29 /* 30 * Assert command to the device, optional. 31 * 32 * @dev: the device 33 * @request: command to be sent to the device 34 * @buf: pointer to buffer related to the request 35 * @return: 0 if OK, -ve on error 36 */ 37 int misc_ioctl(struct udevice *dev, unsigned long request, void *buf); 38 39 /* 40 * Send a message to the device and wait for a response. 41 * 42 * The caller provides the message type/ID and payload to be sent. 43 * The callee constructs any message header required, transmits it to the 44 * target, waits for a response, checks any error code in the response, 45 * strips any message header from the response, and returns the error code 46 * (or a parsed version of it) and the response message payload. 47 * 48 * @dev: the device. 49 * @msgid: the message ID/number to send. 50 * tx_msg: the request/transmit message payload. 51 * tx_size: the size of the buffer pointed at by tx_msg. 52 * rx_msg: the buffer to receive the response message payload. May be NULL if 53 * the caller only cares about the error code. 54 * rx_size: the size of the buffer pointed at by rx_msg. 55 * @return the response message size if OK, -ve on error 56 */ 57 int misc_call(struct udevice *dev, int msgid, void *tx_msg, int tx_size, 58 void *rx_msg, int rx_size); 59 60 /* 61 * struct misc_ops - Driver model Misc operations 62 * 63 * The uclass interface is implemented by all miscellaneous devices which 64 * use driver model. 65 */ 66 struct misc_ops { 67 /* 68 * Read the device to buffer, optional. 69 * 70 * @dev: the device 71 * @offset: offset to read the device 72 * @buf: pointer to data buffer 73 * @size: data size in bytes to read the device 74 * @return: 0 if OK, -ve on error 75 */ 76 int (*read)(struct udevice *dev, int offset, void *buf, int size); 77 /* 78 * Write buffer to the device, optional. 79 * 80 * @dev: the device 81 * @offset: offset to write the device 82 * @buf: pointer to data buffer 83 * @size: data size in bytes to write the device 84 * @return: 0 if OK, -ve on error 85 */ 86 int (*write)(struct udevice *dev, int offset, const void *buf, 87 int size); 88 /* 89 * Assert command to the device, optional. 90 * 91 * @dev: the device 92 * @request: command to be sent to the device 93 * @buf: pointer to buffer related to the request 94 * @return: 0 if OK, -ve on error 95 */ 96 int (*ioctl)(struct udevice *dev, unsigned long request, void *buf); 97 /* 98 * Send a message to the device and wait for a response. 99 * 100 * @dev: the device 101 * @msgid: the message ID/number to send 102 * tx_msg: the request/transmit message payload 103 * tx_size: the size of the buffer pointed at by tx_msg 104 * rx_msg: the buffer to receive the response message payload. May be 105 * NULL if the caller only cares about the error code. 106 * rx_size: the size of the buffer pointed at by rx_msg 107 * @return the response message size if OK, -ve on error 108 */ 109 int (*call)(struct udevice *dev, int msgid, void *tx_msg, int tx_size, 110 void *rx_msg, int rx_size); 111 }; 112 113 #endif /* _MISC_H_ */ 114