mirror of https://gitee.com/openkylin/linux.git
452 lines
14 KiB
C
452 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/************************************************************************
|
|
*
|
|
* IONSP.H Definitions for I/O Networks Serial Protocol
|
|
*
|
|
* Copyright (C) 1997-1998 Inside Out Networks, Inc.
|
|
*
|
|
* These definitions are used by both kernel-mode driver and the
|
|
* peripheral firmware and MUST be kept in sync.
|
|
*
|
|
************************************************************************/
|
|
|
|
/************************************************************************
|
|
|
|
The data to and from all ports on the peripheral is multiplexed
|
|
through a single endpoint pair (EP1 since it supports 64-byte
|
|
MaxPacketSize). Therefore, the data, commands, and status for
|
|
each port must be preceded by a short header identifying the
|
|
destination port. The header also identifies the bytes that follow
|
|
as data or as command/status info.
|
|
|
|
Header format, first byte:
|
|
|
|
CLLLLPPP
|
|
--------
|
|
| | |------ Port Number: 0-7
|
|
| |--------- Length: MSB bits of length
|
|
|----------- Data/Command: 0 = Data header
|
|
1 = Cmd / Status (Cmd if OUT, Status if IN)
|
|
|
|
This gives 2 possible formats:
|
|
|
|
|
|
Data header: 0LLLLPPP LLLLLLLL
|
|
============
|
|
|
|
Where (LLLL,LLLLLLL) is 12-bit length of data that follows for
|
|
port number (PPP). The length is 0-based (0-FFF means 0-4095
|
|
bytes). The ~4K limit allows the host driver (which deals in
|
|
transfer requests instead of individual packets) to write a
|
|
large chunk of data in a single request. Note, however, that
|
|
the length must always be <= the current TxCredits for a given
|
|
port due to buffering limitations on the peripheral.
|
|
|
|
|
|
Cmd/Status header: 1ccccPPP [ CCCCCCCC, Params ]...
|
|
==================
|
|
|
|
Where (cccc) or (cccc,CCCCCCCC) is the cmd or status identifier.
|
|
Frequently-used values are encoded as (cccc), longer ones using
|
|
(cccc,CCCCCCCC). Subsequent bytes are optional parameters and are
|
|
specific to the cmd or status code. This may include a length
|
|
for command and status codes that need variable-length parameters.
|
|
|
|
|
|
In addition, we use another interrupt pipe (endpoint) which the host polls
|
|
periodically for flow control information. The peripheral, when there has
|
|
been a change, sends the following 10-byte packet:
|
|
|
|
RRRRRRRRRRRRRRRR
|
|
T0T0T0T0T0T0T0T0
|
|
T1T1T1T1T1T1T1T1
|
|
T2T2T2T2T2T2T2T2
|
|
T3T3T3T3T3T3T3T3
|
|
|
|
The first field is the 16-bit RxBytesAvail field, which indicates the
|
|
number of bytes which may be read by the host from EP1. This is necessary:
|
|
(a) because OSR2.1 has a bug which causes data loss if the peripheral returns
|
|
fewer bytes than the host expects to read, and (b) because, on Microsoft
|
|
platforms at least, an outstanding read posted on EP1 consumes about 35% of
|
|
the CPU just polling the device for data.
|
|
|
|
The next 4 fields are the 16-bit TxCredits for each port, which indicate how
|
|
many bytes the host is allowed to send on EP1 for transmit to a given port.
|
|
After an OPEN_PORT command, the Edgeport sends the initial TxCredits for that
|
|
port.
|
|
|
|
All 16-bit fields are sent in little-endian (Intel) format.
|
|
|
|
************************************************************************/
|
|
|
|
//
|
|
// Define format of InterruptStatus packet returned from the
|
|
// Interrupt pipe
|
|
//
|
|
|
|
struct int_status_pkt {
|
|
__u16 RxBytesAvail; // Additional bytes available to
|
|
// be read from Bulk IN pipe
|
|
__u16 TxCredits[MAX_RS232_PORTS]; // Additional space available in
|
|
// given port's TxBuffer
|
|
};
|
|
|
|
|
|
#define GET_INT_STATUS_SIZE(NumPorts) (sizeof(__u16) + (sizeof(__u16) * (NumPorts)))
|
|
|
|
|
|
|
|
//
|
|
// Define cmd/status header values and macros to extract them.
|
|
//
|
|
// Data: 0LLLLPPP LLLLLLLL
|
|
// Cmd/Stat: 1ccccPPP CCCCCCCC
|
|
|
|
#define IOSP_DATA_HDR_SIZE 2
|
|
#define IOSP_CMD_HDR_SIZE 2
|
|
|
|
#define IOSP_MAX_DATA_LENGTH 0x0FFF // 12 bits -> 4K
|
|
|
|
#define IOSP_PORT_MASK 0x07 // Mask to isolate port number
|
|
#define IOSP_CMD_STAT_BIT 0x80 // If set, this is command/status header
|
|
|
|
#define IS_CMD_STAT_HDR(Byte1) ((Byte1) & IOSP_CMD_STAT_BIT)
|
|
#define IS_DATA_HDR(Byte1) (!IS_CMD_STAT_HDR(Byte1))
|
|
|
|
#define IOSP_GET_HDR_PORT(Byte1) ((__u8) ((Byte1) & IOSP_PORT_MASK))
|
|
#define IOSP_GET_HDR_DATA_LEN(Byte1, Byte2) ((__u16) (((__u16)((Byte1) & 0x78)) << 5) | (Byte2))
|
|
#define IOSP_GET_STATUS_CODE(Byte1) ((__u8) (((Byte1) & 0x78) >> 3))
|
|
|
|
|
|
//
|
|
// These macros build the 1st and 2nd bytes for a data header
|
|
//
|
|
#define IOSP_BUILD_DATA_HDR1(Port, Len) ((__u8) (((Port) | ((__u8) (((__u16) (Len)) >> 5) & 0x78))))
|
|
#define IOSP_BUILD_DATA_HDR2(Port, Len) ((__u8) (Len))
|
|
|
|
|
|
//
|
|
// These macros build the 1st and 2nd bytes for a command header
|
|
//
|
|
#define IOSP_BUILD_CMD_HDR1(Port, Cmd) ((__u8) (IOSP_CMD_STAT_BIT | (Port) | ((__u8) ((Cmd) << 3))))
|
|
|
|
|
|
//--------------------------------------------------------------
|
|
//
|
|
// Define values for commands and command parameters
|
|
// (sent from Host to Edgeport)
|
|
//
|
|
// 1ccccPPP P1P1P1P1 [ P2P2P2P2P2 ]...
|
|
//
|
|
// cccc: 00-07 2-byte commands. Write UART register 0-7 with
|
|
// value in P1. See 16650.H for definitions of
|
|
// UART register numbers and contents.
|
|
//
|
|
// 08-0B 3-byte commands: ==== P1 ==== ==== P2 ====
|
|
// 08 available for expansion
|
|
// 09 1-param commands Command Code Param
|
|
// 0A available for expansion
|
|
// 0B available for expansion
|
|
//
|
|
// 0C-0D 4-byte commands. P1 = extended cmd and P2,P3 = params
|
|
// Currently unimplemented.
|
|
//
|
|
// 0E-0F N-byte commands: P1 = num bytes after P1 (ie, TotalLen - 2)
|
|
// P2 = extended cmd, P3..Pn = parameters.
|
|
// Currently unimplemented.
|
|
//
|
|
|
|
#define IOSP_WRITE_UART_REG(n) ((n) & 0x07) // UartReg[ n ] := P1
|
|
|
|
// Register numbers and contents
|
|
// defined in 16554.H.
|
|
|
|
// 0x08 // Available for expansion.
|
|
#define IOSP_EXT_CMD 0x09 // P1 = Command code (defined below)
|
|
|
|
// P2 = Parameter
|
|
|
|
//
|
|
// Extended Command values, used with IOSP_EXT_CMD, may
|
|
// or may not use parameter P2.
|
|
//
|
|
|
|
#define IOSP_CMD_OPEN_PORT 0x00 // Enable ints, init UART. (NO PARAM)
|
|
#define IOSP_CMD_CLOSE_PORT 0x01 // Disable ints, flush buffers. (NO PARAM)
|
|
#define IOSP_CMD_CHASE_PORT 0x02 // Wait for Edgeport TX buffers to empty. (NO PARAM)
|
|
#define IOSP_CMD_SET_RX_FLOW 0x03 // Set Rx Flow Control in Edgeport
|
|
#define IOSP_CMD_SET_TX_FLOW 0x04 // Set Tx Flow Control in Edgeport
|
|
#define IOSP_CMD_SET_XON_CHAR 0x05 // Set XON Character in Edgeport
|
|
#define IOSP_CMD_SET_XOFF_CHAR 0x06 // Set XOFF Character in Edgeport
|
|
#define IOSP_CMD_RX_CHECK_REQ 0x07 // Request Edgeport to insert a Checkpoint into
|
|
|
|
// the receive data stream (Parameter = 1 byte sequence number)
|
|
|
|
#define IOSP_CMD_SET_BREAK 0x08 // Turn on the BREAK (LCR bit 6)
|
|
#define IOSP_CMD_CLEAR_BREAK 0x09 // Turn off the BREAK (LCR bit 6)
|
|
|
|
|
|
//
|
|
// Define macros to simplify building of IOSP cmds
|
|
//
|
|
|
|
#define MAKE_CMD_WRITE_REG(ppBuf, pLen, Port, Reg, Val) \
|
|
do { \
|
|
(*(ppBuf))[0] = IOSP_BUILD_CMD_HDR1((Port), \
|
|
IOSP_WRITE_UART_REG(Reg)); \
|
|
(*(ppBuf))[1] = (Val); \
|
|
\
|
|
*ppBuf += 2; \
|
|
*pLen += 2; \
|
|
} while (0)
|
|
|
|
#define MAKE_CMD_EXT_CMD(ppBuf, pLen, Port, ExtCmd, Param) \
|
|
do { \
|
|
(*(ppBuf))[0] = IOSP_BUILD_CMD_HDR1((Port), IOSP_EXT_CMD); \
|
|
(*(ppBuf))[1] = (ExtCmd); \
|
|
(*(ppBuf))[2] = (Param); \
|
|
\
|
|
*ppBuf += 3; \
|
|
*pLen += 3; \
|
|
} while (0)
|
|
|
|
|
|
|
|
//--------------------------------------------------------------
|
|
//
|
|
// Define format of flow control commands
|
|
// (sent from Host to Edgeport)
|
|
//
|
|
// 11001PPP FlowCmd FlowTypes
|
|
//
|
|
// Note that the 'FlowTypes' parameter is a bit mask; that is,
|
|
// more than one flow control type can be active at the same time.
|
|
// FlowTypes = 0 means 'no flow control'.
|
|
//
|
|
|
|
//
|
|
// IOSP_CMD_SET_RX_FLOW
|
|
//
|
|
// Tells Edgeport how it can stop incoming UART data
|
|
//
|
|
// Example for Port 0
|
|
// P0 = 11001000
|
|
// P1 = IOSP_CMD_SET_RX_FLOW
|
|
// P2 = Bit mask as follows:
|
|
|
|
#define IOSP_RX_FLOW_RTS 0x01 // Edgeport drops RTS to stop incoming data
|
|
#define IOSP_RX_FLOW_DTR 0x02 // Edgeport drops DTR to stop incoming data
|
|
#define IOSP_RX_FLOW_DSR_SENSITIVITY 0x04 // Ignores Rx data unless DSR high
|
|
|
|
// Not currently implemented by firmware.
|
|
#define IOSP_RX_FLOW_XON_XOFF 0x08 // Edgeport sends XOFF char to stop incoming data.
|
|
|
|
// Host must have previously programmed the
|
|
// XON/XOFF values with SET_XON/SET_XOFF
|
|
// before enabling this bit.
|
|
|
|
//
|
|
// IOSP_CMD_SET_TX_FLOW
|
|
//
|
|
// Tells Edgeport what signal(s) will stop it from transmitting UART data
|
|
//
|
|
// Example for Port 0
|
|
// P0 = 11001000
|
|
// P1 = IOSP_CMD_SET_TX_FLOW
|
|
// P2 = Bit mask as follows:
|
|
|
|
#define IOSP_TX_FLOW_CTS 0x01 // Edgeport stops Tx if CTS low
|
|
#define IOSP_TX_FLOW_DSR 0x02 // Edgeport stops Tx if DSR low
|
|
#define IOSP_TX_FLOW_DCD 0x04 // Edgeport stops Tx if DCD low
|
|
#define IOSP_TX_FLOW_XON_XOFF 0x08 // Edgeport stops Tx upon receiving XOFF char.
|
|
|
|
// Host must have previously programmed the
|
|
// XON/XOFF values with SET_XON/SET_XOFF
|
|
// before enabling this bit.
|
|
#define IOSP_TX_FLOW_XOFF_CONTINUE 0x10 // If not set, Edgeport stops Tx when
|
|
|
|
// sending XOFF in order to fix broken
|
|
// systems that interpret the next
|
|
// received char as XON.
|
|
// If set, Edgeport continues Tx
|
|
// normally after transmitting XOFF.
|
|
// Not currently implemented by firmware.
|
|
#define IOSP_TX_TOGGLE_RTS 0x20 // Edgeport drives RTS as a true half-duplex
|
|
|
|
// Request-to-Send signal: it is raised before
|
|
// beginning transmission and lowered after
|
|
// the last Tx char leaves the UART.
|
|
// Not currently implemented by firmware.
|
|
|
|
//
|
|
// IOSP_CMD_SET_XON_CHAR
|
|
//
|
|
// Sets the character which Edgeport transmits/interprets as XON.
|
|
// Note: This command MUST be sent before sending a SET_RX_FLOW or
|
|
// SET_TX_FLOW with the XON_XOFF bit set.
|
|
//
|
|
// Example for Port 0
|
|
// P0 = 11001000
|
|
// P1 = IOSP_CMD_SET_XON_CHAR
|
|
// P2 = 0x11
|
|
|
|
|
|
//
|
|
// IOSP_CMD_SET_XOFF_CHAR
|
|
//
|
|
// Sets the character which Edgeport transmits/interprets as XOFF.
|
|
// Note: This command must be sent before sending a SET_RX_FLOW or
|
|
// SET_TX_FLOW with the XON_XOFF bit set.
|
|
//
|
|
// Example for Port 0
|
|
// P0 = 11001000
|
|
// P1 = IOSP_CMD_SET_XOFF_CHAR
|
|
// P2 = 0x13
|
|
|
|
|
|
//
|
|
// IOSP_CMD_RX_CHECK_REQ
|
|
//
|
|
// This command is used to assist in the implementation of the
|
|
// IOCTL_SERIAL_PURGE Windows IOCTL.
|
|
// This IOSP command tries to place a marker at the end of the RX
|
|
// queue in the Edgeport. If the Edgeport RX queue is full then
|
|
// the Check will be discarded.
|
|
// It is up to the device driver to timeout waiting for the
|
|
// RX_CHECK_RSP. If a RX_CHECK_RSP is received, the driver is
|
|
// sure that all data has been received from the edgeport and
|
|
// may now purge any internal RX buffers.
|
|
// Note tat the sequence numbers may be used to detect lost
|
|
// CHECK_REQs.
|
|
|
|
// Example for Port 0
|
|
// P0 = 11001000
|
|
// P1 = IOSP_CMD_RX_CHECK_REQ
|
|
// P2 = Sequence number
|
|
|
|
|
|
// Response will be:
|
|
// P1 = IOSP_EXT_RX_CHECK_RSP
|
|
// P2 = Request Sequence number
|
|
|
|
|
|
|
|
//--------------------------------------------------------------
|
|
//
|
|
// Define values for status and status parameters
|
|
// (received by Host from Edgeport)
|
|
//
|
|
// 1ssssPPP P1P1P1P1 [ P2P2P2P2P2 ]...
|
|
//
|
|
// ssss: 00-07 2-byte status. ssss identifies which UART register
|
|
// has changed value, and the new value is in P1.
|
|
// Note that the ssss values do not correspond to the
|
|
// 16554 register numbers given in 16554.H. Instead,
|
|
// see below for definitions of the ssss numbers
|
|
// used in this status message.
|
|
//
|
|
// 08-0B 3-byte status: ==== P1 ==== ==== P2 ====
|
|
// 08 LSR_DATA: New LSR Errored byte
|
|
// 09 1-param responses Response Code Param
|
|
// 0A OPEN_RSP: InitialMsr TxBufferSize
|
|
// 0B available for expansion
|
|
//
|
|
// 0C-0D 4-byte status. P1 = extended status code and P2,P3 = params
|
|
// Not currently implemented.
|
|
//
|
|
// 0E-0F N-byte status: P1 = num bytes after P1 (ie, TotalLen - 2)
|
|
// P2 = extended status, P3..Pn = parameters.
|
|
// Not currently implemented.
|
|
//
|
|
|
|
/****************************************************
|
|
* SSSS values for 2-byte status messages (0-8)
|
|
****************************************************/
|
|
|
|
#define IOSP_STATUS_LSR 0x00 // P1 is new value of LSR register.
|
|
|
|
// Bits defined in 16554.H. Edgeport
|
|
// returns this in order to report
|
|
// line status errors (overrun,
|
|
// parity, framing, break). This form
|
|
// is used when a errored receive data
|
|
// character was NOT present in the
|
|
// UART when the LSR error occurred
|
|
// (ie, when LSR bit 0 = 0).
|
|
|
|
#define IOSP_STATUS_MSR 0x01 // P1 is new value of MSR register.
|
|
|
|
// Bits defined in 16554.H. Edgeport
|
|
// returns this in order to report
|
|
// changes in modem status lines
|
|
// (CTS, DSR, RI, CD)
|
|
//
|
|
|
|
// 0x02 // Available for future expansion
|
|
// 0x03 //
|
|
// 0x04 //
|
|
// 0x05 //
|
|
// 0x06 //
|
|
// 0x07 //
|
|
|
|
|
|
/****************************************************
|
|
* SSSS values for 3-byte status messages (8-A)
|
|
****************************************************/
|
|
|
|
#define IOSP_STATUS_LSR_DATA 0x08 // P1 is new value of LSR register (same as STATUS_LSR)
|
|
|
|
// P2 is errored character read from
|
|
// RxFIFO after LSR reported an error.
|
|
|
|
#define IOSP_EXT_STATUS 0x09 // P1 is status/response code, param in P2.
|
|
|
|
|
|
// Response Codes (P1 values) for 3-byte status messages
|
|
|
|
#define IOSP_EXT_STATUS_CHASE_RSP 0 // Reply to CHASE_PORT cmd. P2 is outcome:
|
|
#define IOSP_EXT_STATUS_CHASE_PASS 0 // P2 = 0: All Tx data drained successfully
|
|
#define IOSP_EXT_STATUS_CHASE_FAIL 1 // P2 = 1: Timed out (stuck due to flow
|
|
|
|
// control from remote device).
|
|
|
|
#define IOSP_EXT_STATUS_RX_CHECK_RSP 1 // Reply to RX_CHECK cmd. P2 is sequence number
|
|
|
|
|
|
#define IOSP_STATUS_OPEN_RSP 0x0A // Reply to OPEN_PORT cmd.
|
|
|
|
// P1 is Initial MSR value
|
|
// P2 is encoded TxBuffer Size:
|
|
// TxBufferSize = (P2 + 1) * 64
|
|
|
|
// 0x0B // Available for future expansion
|
|
|
|
#define GET_TX_BUFFER_SIZE(P2) (((P2) + 1) * 64)
|
|
|
|
|
|
|
|
|
|
/****************************************************
|
|
* SSSS values for 4-byte status messages
|
|
****************************************************/
|
|
|
|
#define IOSP_EXT4_STATUS 0x0C // Extended status code in P1,
|
|
|
|
// Params in P2, P3
|
|
// Currently unimplemented.
|
|
|
|
// 0x0D // Currently unused, available.
|
|
|
|
|
|
|
|
//
|
|
// Macros to parse status messages
|
|
//
|
|
|
|
#define IOSP_GET_STATUS_LEN(code) ((code) < 8 ? 2 : ((code) < 0x0A ? 3 : 4))
|
|
|
|
#define IOSP_STATUS_IS_2BYTE(code) ((code) < 0x08)
|
|
#define IOSP_STATUS_IS_3BYTE(code) (((code) >= 0x08) && ((code) <= 0x0B))
|
|
#define IOSP_STATUS_IS_4BYTE(code) (((code) >= 0x0C) && ((code) <= 0x0D))
|
|
|