patch-2.3.15 linux/drivers/char/ip2/i2pack.h

• Lines: 365
• Date: Mon Aug 23 10:23:23 1999
• Orig file: v2.3.14/linux/drivers/char/ip2/i2pack.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.14/linux/drivers/char/ip2/i2pack.h linux/drivers/char/ip2/i2pack.h
@@ -0,0 +1,364 @@
+/*******************************************************************************
+*
+*   (c) 1998 by Computone Corporation
+*
+********************************************************************************
+*
+*
+*   PACKAGE:     Linux tty Device Driver for IntelliPort II family of multiport
+*                serial I/O controllers.
+*
+*   DESCRIPTION: Definitions of the packets used to transfer data and commands
+*                Host <--> Board. Information provided here is only applicable
+*                when the standard loadware is active.
+*
+*******************************************************************************/
+#ifndef I2PACK_H
+#define I2PACK_H  1
+
+//-----------------------------------------------
+// Revision History:
+//
+// 10 October 1991   MAG First draft
+// 24 February 1992  MAG Additions for 1.4.x loadware
+// 11 March 1992     MAG New status packets
+//
+//-----------------------------------------------
+
+//------------------------------------------------------------------------------
+// Packet Formats:
+//
+// Information passes between the host and board through the FIFO in packets.
+// These have headers which indicate the type of packet. Because the fifo data
+// path may be 16-bits wide, the protocol is constrained such that each packet
+// is always padded to an even byte count. (The lower-level interface routines
+// -- i2ellis.c -- are designed to do this).
+//
+// The sender (be it host or board) must place some number of complete packets
+// in the fifo, then place a message in the mailbox that packets are available.
+// Placing such a message interrupts the "receiver" (be it board or host), who
+// reads the mailbox message and determines that there are incoming packets
+// ready. Since there are no partial packets, and the length of a packet is
+// given in the header, the remainder of the packet can be read without checking
+// for FIFO empty condition. The process is repeated, packet by packet, until
+// the incoming FIFO is empty. Then the receiver uses the outbound mailbox to
+// signal the board that it has read the data. Only then can the sender place
+// additional data in the fifo.
+//------------------------------------------------------------------------------
+//
+//------------------------------------------------
+// Definition of Packet Header Area
+//------------------------------------------------
+//
+// Caution: these only define header areas. In actual use the data runs off
+// beyond the end of these structures.
+//
+// Since these structures are based on sequences of bytes which go to the board,
+// there cannot be ANY padding between the elements.
+#pragma pack(1)
+
+//----------------------------
+// DATA PACKETS
+//----------------------------
+
+typedef struct _i2DataHeader
+{
+	unsigned char i2sChannel;  /* The channel number: 0-255 */
+
+	// -- Bitfields are allocated LSB first --
+
+	// For incoming data, indicates whether this is an ordinary packet or a
+	// special one (e.g., hot key hit).
+	unsigned i2sId : 2 __attribute__ ((__packed__));
+
+	// For tagging data packets. There are flush commands which flush only data
+	// packets bearing a particular tag. (used in implementing IntelliView and
+	// IntelliPrint). THE TAG VALUE 0xf is RESERVED and must not be used (it has
+	// meaning internally to the loadware).
+	unsigned i2sTag : 4;
+
+	// These two bits determine the type of packet sent/received.
+	unsigned i2sType : 2;
+
+	// The count of data to follow: does not include the possible additional
+	// padding byte. MAXIMUM COUNT: 4094. The top four bits must be 0.
+	unsigned short i2sCount;
+
+} i2DataHeader, *i2DataHeaderPtr;
+
+// Structure is immediately followed by the data, proper.
+
+//----------------------------
+// NON-DATA PACKETS
+//----------------------------
+
+typedef struct _i2CmdHeader
+{
+	unsigned char i2sChannel;	// The channel number: 0-255 (Except where noted
+								// - see below
+
+	// Number of bytes of commands, status or whatever to follow
+	unsigned i2sCount : 6;
+
+	// These two bits determine the type of packet sent/received.
+	unsigned i2sType : 2;
+
+} i2CmdHeader, *i2CmdHeaderPtr;
+
+// Structure is immediately followed by the applicable data.
+
+//---------------------------------------
+// Flow Control Packets (Outbound)
+//---------------------------------------
+
+// One type of outbound command packet is so important that the entire structure
+// is explicitly defined here. That is the flow-control packet. This is never
+// sent by user-level code (as would be the commands to raise/lower DTR, for
+// example). These are only sent by the library routines in response to reading
+// incoming data into the buffers.
+//
+// The parameters inside the command block are maintained in place, then the
+// block is sent at the appropriate time.
+
+typedef struct _flowIn
+{
+	i2CmdHeader    hd;      // Channel #, count, type (see above)
+	unsigned char  fcmd;    // The flow control command (37)
+	unsigned short asof;    // As of byte number "asof" (LSB first!) I have room
+							// for "room" bytes
+	unsigned short room;
+} flowIn, *flowInPtr;
+
+//----------------------------------------
+// (Incoming) Status Packets
+//----------------------------------------
+
+// Incoming packets which are non-data packets are status packets. In this case,
+// the channel number in the header is unimportant. What follows are one or more
+// sub-packets, the first word of which consists of the channel (first or low
+// byte) and the status indicator (second or high byte), followed by possibly
+// more data.
+
+#define STAT_CTS_UP     0  /* CTS raised  (no other bytes) */
+#define STAT_CTS_DN     1  /* CTS dropped (no other bytes) */
+#define STAT_DCD_UP     2  /* DCD raised  (no other bytes) */
+#define STAT_DCD_DN     3  /* DCD dropped (no other bytes) */
+#define STAT_DSR_UP     4  /* DSR raised  (no other bytes) */
+#define STAT_DSR_DN     5  /* DSR dropped (no other bytes) */
+#define STAT_RI_UP      6  /* RI  raised  (no other bytes) */
+#define STAT_RI_DN      7  /* RI  dropped (no other bytes) */
+#define STAT_BRK_DET    8  /* BRK detect  (no other bytes) */
+#define STAT_FLOW       9  /* Flow control(-- more: see below */
+#define STAT_BMARK      10 /* Bookmark    (no other bytes)
+							* Bookmark is sent as a response to
+							* a command 60: request for bookmark
+							*/
+#define STAT_STATUS     11 /* Special packet: see below */
+#define STAT_TXCNT      12 /* Special packet: see below */
+#define STAT_RXCNT      13 /* Special packet: see below */
+#define STAT_BOXIDS     14 /* Special packet: see below */
+#define STAT_HWFAIL     15 /* Special packet: see below */
+
+#define STAT_MOD_ERROR  0xc0
+#define STAT_MODEM      0xc0/* If status & STAT_MOD_ERROR:
+							 * == STAT_MODEM, then this is a modem
+							 * status packet, given in response to a
+							 * CMD_DSS_NOW command.
+							 * The low nibble has each data signal:
+							 */
+#define STAT_MOD_DCD    0x8
+#define STAT_MOD_RI     0x4
+#define STAT_MOD_DSR    0x2
+#define STAT_MOD_CTS    0x1
+
+#define STAT_ERROR      0x80/* If status & STAT_MOD_ERROR
+							 * == STAT_ERROR, then
+							 * sort of error on the channel.
+							 * The remaining seven bits indicate
+							 * what sort of error it is.
+							 */
+/* The low three bits indicate parity, framing, or overrun errors */
+
+#define STAT_E_PARITY   4     /* Parity error */
+#define STAT_E_FRAMING  2     /* Framing error */
+#define STAT_E_OVERRUN  1     /* (uxart) overrun error */
+
+//---------------------------------------
+// STAT_FLOW packets
+//---------------------------------------
+
+typedef struct _flowStat
+{
+	unsigned short asof;
+	unsigned short room;
+}flowStat, *flowStatPtr;
+
+// flowStat packets are received from the board to regulate the flow of outgoing
+// data. A local copy of this structure is also kept to track the amount of
+// credits used and credits remaining. "room" is the amount of space in the
+// board's buffers, "as of" having received a certain byte number. When sending
+// data to the fifo, you must calculate how much buffer space your packet will
+// use.  Add this to the current "asof" and subtract it from the current "room".
+//
+// The calculation for the board's buffer is given by CREDIT_USAGE, where size
+// is the un-rounded count of either data characters or command characters.
+// (Which is to say, the count rounded up, plus two).
+
+#define CREDIT_USAGE(size) (((size) + 3) & ~1)
+
+//---------------------------------------
+// STAT_STATUS packets
+//---------------------------------------
+
+typedef  struct   _debugStat
+{
+	unsigned char d_ccsr;
+	unsigned char d_txinh;
+	unsigned char d_stat1;
+	unsigned char d_stat2;
+} debugStat, *debugStatPtr;
+
+// debugStat packets are sent to the host in response to a CMD_GET_STATUS
+// command.  Each byte is bit-mapped as described below:
+
+#define D_CCSR_XON      2     /* Has received XON, ready to transmit */
+#define D_CCSR_XOFF     4     /* Has received XOFF, not transmitting */
+#define D_CCSR_TXENAB   8     /* Transmitter is enabled */
+#define D_CCSR_RXENAB   0x80  /* Receiver is enabled */
+
+#define D_TXINH_BREAK   1     /* We are sending a break */
+#define D_TXINH_EMPTY   2     /* No data to send */
+#define D_TXINH_SUSP    4     /* Output suspended via command 57 */
+#define D_TXINH_CMD     8     /* We are processing an in-line command */
+#define D_TXINH_LCD     0x10  /* LCD diagnostics are running */
+#define D_TXINH_PAUSE   0x20  /* We are processing a PAUSE command */
+#define D_TXINH_DCD     0x40  /* DCD is low, preventing transmission */
+#define D_TXINH_DSR     0x80  /* DSR is low, preventing transmission */
+
+#define D_STAT1_TXEN    1     /* Transmit INTERRUPTS enabled */
+#define D_STAT1_RXEN    2     /* Receiver INTERRUPTS enabled */
+#define D_STAT1_MDEN    4     /* Modem (data set sigs) interrupts enabled */
+#define D_STAT1_RLM     8     /* Remote loopback mode selected */
+#define D_STAT1_LLM     0x10  /* Local internal loopback mode selected */
+#define D_STAT1_CTS     0x20  /* CTS is low, preventing transmission */
+#define D_STAT1_DTR     0x40  /* DTR is low, to stop remote transmission */
+#define D_STAT1_RTS     0x80  /* RTS is low, to stop remote transmission */
+
+#define D_STAT2_TXMT    1     /* Transmit buffers are all empty */
+#define D_STAT2_RXMT    2     /* Receive buffers are all empty */
+#define D_STAT2_RXINH   4     /* Loadware has tried to inhibit remote
+							   * transmission:  dropped DTR, sent XOFF,
+							   * whatever...
+							   */
+#define D_STAT2_RXFLO   8     /* Loadware can send no more data to host
+							   * until it receives a flow-control packet
+							   */
+//-----------------------------------------
+// STAT_TXCNT and STAT_RXCNT packets
+//----------------------------------------
+
+typedef  struct   _cntStat
+{
+	unsigned short cs_time;    // (Assumes host is little-endian!)
+	unsigned short cs_count;
+} cntStat, *cntStatPtr;
+
+// These packets are sent in response to a CMD_GET_RXCNT or a CMD_GET_TXCNT
+// bypass command. cs_time is a running 1 Millisecond counter which acts as a
+// time stamp. cs_count is a running counter of data sent or received from the
+// uxarts. (Not including data added by the chip itself, as with CRLF
+// processing).
+//------------------------------------------
+// STAT_HWFAIL packets
+//------------------------------------------
+
+typedef struct _failStat
+{
+	unsigned char fs_written;
+	unsigned char fs_read;
+	unsigned short fs_address;
+} failStat, *failStatPtr;
+
+// This packet is sent whenever the on-board diagnostic process detects an
+// error. At startup, this process is dormant. The host can wake it up by
+// issuing the bypass command CMD_HW_TEST. The process runs at low priority and
+// performs continuous hardware verification; writing data to certain on-board
+// registers, reading it back, and comparing. If it detects an error, this
+// packet is sent to the host, and the process goes dormant again until the host
+// sends another CMD_HW_TEST. It then continues with the next register to be
+// tested.
+
+//------------------------------------------------------------------------------
+// Macros to deal with the headers more easily! Note that these are defined so
+// they may be used as "left" as well as "right" expressions.
+//------------------------------------------------------------------------------
+
+// Given a pointer to the packet, reference the channel number
+//
+#define CHANNEL_OF(pP)  ((i2DataHeaderPtr)(pP))->i2sChannel
+
+// Given a pointer to the packet, reference the Packet type
+//
+#define PTYPE_OF(pP) ((i2DataHeaderPtr)(pP))->i2sType
+
+// The possible types of packets
+//
+#define PTYPE_DATA   0  /* Host <--> Board */
+#define PTYPE_BYPASS 1  /* Host ---> Board */
+#define PTYPE_INLINE 2  /* Host ---> Board */
+#define PTYPE_STATUS 2  /* Host <--- Board */
+
+// Given a pointer to a Data packet, reference the Tag
+//
+#define TAG_OF(pP) ((i2DataHeaderPtr)(pP))->i2sTag
+
+// Given a pointer to a Data packet, reference the data i.d.
+//
+#define ID_OF(pP)  ((i2DataHeaderPtr)(pP))->i2sId
+
+// The possible types of ID's
+//
+#define ID_ORDINARY_DATA   0
+#define ID_HOT_KEY         1
+
+// Given a pointer to a Data packet, reference the count
+//
+#define DATA_COUNT_OF(pP) ((i2DataHeaderPtr)(pP))->i2sCount
+
+// Given a pointer to a Data packet, reference the beginning of data
+//
+#define DATA_OF(pP) &((unsigned char *)(pP))[4] // 4 = size of header
+
+// Given a pointer to a Non-Data packet, reference the count
+//
+#define CMD_COUNT_OF(pP) ((i2CmdHeaderPtr)(pP))->i2sCount
+
+#define MAX_CMD_PACK_SIZE  62 // Maximum size of such a count
+
+// Given a pointer to a Non-Data packet, reference the beginning of data
+//
+#define CMD_OF(pP) &((unsigned char *)(pP))[2]  // 2 = size of header
+
+//--------------------------------
+// MailBox Bits:
+//--------------------------------
+
+//--------------------------
+// Outgoing (host to board)
+//--------------------------
+//
+#define MB_OUT_STUFFED     0x80  // Host has placed output in fifo 
+#define MB_IN_STRIPPED     0x40  // Host has read in all input from fifo 
+
+//--------------------------
+// Incoming (board to host)
+//--------------------------
+//
+#define MB_IN_STUFFED      0x80  // Board has placed input in fifo 
+#define MB_OUT_STRIPPED    0x40  // Board has read all output from fifo 
+#define MB_FATAL_ERROR     0x20  // Board has encountered a fatal error
+
+#pragma pack(4)                  // Reset padding to command-line default
+
+#endif      // I2PACK_H
+