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linux/drivers/char/ip2/i2ellis.h
Andrew Morton 2723f9603a [PATCH] ip2 warning fix 
Make this:

drivers/char/ip2/ip2main.c: In function 'ip2_loadmain':
drivers/char/ip2/ip2main.c:654: warning: control may reach end of non-void function 'iiSetAddress' being inlined
drivers/char/ip2/ip2main.c:808: warning: control may reach end of non-void function 'iiInitialize' being inlined

go away.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2007-01-05 23:55:23 -08:00

615 lines
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/*******************************************************************************
*
* (c) 1999 by Computone Corporation
*
********************************************************************************
*
*
* PACKAGE: Linux tty Device Driver for IntelliPort II family of multiport
* serial I/O controllers.
*
* DESCRIPTION: Mainline code for the device driver
*
*******************************************************************************/
//------------------------------------------------------------------------------
// i2ellis.h
//
// IntelliPort-II and IntelliPort-IIEX
//
// Extremely
// Low
// Level
// Interface
// Services
//
// Structure Definitions and declarations for "ELLIS" service routines found in
// i2ellis.c
//
// These routines are based on properties of the IntelliPort-II and -IIEX
// hardware and bootstrap firmware, and are not sensitive to particular
// conventions of any particular loadware.
//
// Unlike i2hw.h, which provides IRONCLAD hardware definitions, the material
// here and in i2ellis.c is intended to provice a useful, but not required,
// layer of insulation from the hardware specifics.
//------------------------------------------------------------------------------
#ifndef I2ELLIS_H /* To prevent multiple includes */
#define I2ELLIS_H 1
//------------------------------------------------
// Revision History:
//
// 30 September 1991 MAG First Draft Started
// 12 October 1991 ...continued...
//
// 20 December 1996 AKM Linux version
//-------------------------------------------------
//----------------------
// Mandatory Includes:
//----------------------
#include "ip2types.h"
#include "i2hw.h" // The hardware definitions
//------------------------------------------
// STAT_BOXIDS packets
//------------------------------------------
#define MAX_BOX 4
typedef struct _bidStat
{
unsigned char bid_value[MAX_BOX];
} bidStat, *bidStatPtr;
// This packet is sent in response to a CMD_GET_BOXIDS bypass command. For -IIEX
// boards, reports the hardware-specific "asynchronous resource register" on
// each expansion box. Boxes not present report 0xff. For -II boards, the first
// element contains 0x80 for 8-port, 0x40 for 4-port boards.
// Box IDs aka ARR or Async Resource Register (more than you want to know)
// 7 6 5 4 3 2 1 0
// F F N N L S S S
// =============================
// F F - Product Family Designator
// =====+++++++++++++++++++++++++++++++
// 0 0 - Intelliport II EX / ISA-8
// 1 0 - IntelliServer
// 0 1 - SAC - Port Device (Intelliport III ??? )
// =====+++++++++++++++++++++++++++++++++++++++
// N N - Number of Ports
// 0 0 - 8 (eight)
// 0 1 - 4 (four)
// 1 0 - 12 (twelve)
// 1 1 - 16 (sixteen)
// =++++++++++++++++++++++++++++++++++
// L - LCD Display Module Present
// 0 - No
// 1 - LCD module present
// =========+++++++++++++++++++++++++++++++++++++
// S S S - Async Signals Supported Designator
// 0 0 0 - 8dss, Mod DCE DB25 Female
// 0 0 1 - 6dss, RJ-45
// 0 1 0 - RS-232/422 dss, DB25 Female
// 0 1 1 - RS-232/422 dss, separate 232/422 DB25 Female
// 1 0 0 - 6dss, 921.6 I/F with ST654's
// 1 0 1 - RS-423/232 8dss, RJ-45 10Pin
// 1 1 0 - 6dss, Mod DCE DB25 Female
// 1 1 1 - NO BOX PRESENT
#define FF(c) ((c & 0xC0) >> 6)
#define NN(c) ((c & 0x30) >> 4)
#define L(c) ((c & 0x08) >> 3)
#define SSS(c) (c & 0x07)
#define BID_HAS_654(x) (SSS(x) == 0x04)
#define BID_NO_BOX 0xff /* no box */
#define BID_8PORT 0x80 /* IP2-8 port */
#define BID_4PORT 0x81 /* IP2-4 port */
#define BID_EXP_MASK 0x30 /* IP2-EX */
#define BID_EXP_8PORT 0x00 /* 8, */
#define BID_EXP_4PORT 0x10 /* 4, */
#define BID_EXP_UNDEF 0x20 /* UNDEF, */
#define BID_EXP_16PORT 0x30 /* 16, */
#define BID_LCD_CTRL 0x08 /* LCD Controller */
#define BID_LCD_NONE 0x00 /* - no controller present */
#define BID_LCD_PRES 0x08 /* - controller present */
#define BID_CON_MASK 0x07 /* - connector pinouts */
#define BID_CON_DB25 0x00 /* - DB-25 F */
#define BID_CON_RJ45 0x01 /* - rj45 */
//------------------------------------------------------------------------------
// i2eBordStr
//
// This structure contains all the information the ELLIS routines require in
// dealing with a particular board.
//------------------------------------------------------------------------------
// There are some queues here which are guaranteed to never contain the entry
// for a single channel twice. So they must be slightly larger to allow
// unambiguous full/empty management
//
#define CH_QUEUE_SIZE ABS_MOST_PORTS+2
typedef struct _i2eBordStr
{
porStr i2ePom; // Structure containing the power-on message.
unsigned short i2ePomSize;
// The number of bytes actually read if
// different from sizeof i2ePom, indicates
// there is an error!
unsigned short i2eStartMail;
// Contains whatever inbound mailbox data
// present at startup. NO_MAIL_HERE indicates
// nothing was present. No special
// significance as of this writing, but may be
// useful for diagnostic reasons.
unsigned short i2eValid;
// Indicates validity of the structure; if
// i2eValid == I2E_MAGIC, then we can trust
// the other fields. Some (especially
// initialization) functions are good about
// checking for validity. Many functions do
// not, it being assumed that the larger
// context assures we are using a valid
// i2eBordStrPtr.
unsigned short i2eError;
// Used for returning an error condition from
// several functions which use i2eBordStrPtr
// as an argument.
// Accelerators to characterize separate features of a board, derived from a
// number of sources.
unsigned short i2eFifoSize;
// Always, the size of the FIFO. For
// IntelliPort-II, always the same, for -IIEX
// taken from the Power-On reset message.
volatile
unsigned short i2eFifoRemains;
// Used during normal operation to indicate a
// lower bound on the amount of data which
// might be in the outbound fifo.
unsigned char i2eFifoStyle;
// Accelerator which tells which style (-II or
// -IIEX) FIFO we are using.
unsigned char i2eDataWidth16;
// Accelerator which tells whether we should
// do 8 or 16-bit data transfers.
unsigned char i2eMaxIrq;
// The highest allowable IRQ, based on the
// slot size.
unsigned char i2eChangeIrq;
// Whether tis valid to change IRQ's
// ISA = ok, EISA, MicroChannel, no
// Accelerators for various addresses on the board
int i2eBase; // I/O Address of the Board
int i2eData; // From here data transfers happen
int i2eStatus; // From here status reads happen
int i2ePointer; // (IntelliPort-II: pointer/commands)
int i2eXMail; // (IntelliPOrt-IIEX: mailboxes
int i2eXMask; // (IntelliPort-IIEX: mask write
//-------------------------------------------------------
// Information presented in a common format across boards
// For each box, bit map of the channels present. Box closest to
// the host is box 0. LSB is channel 0. IntelliPort-II (non-expandable)
// is taken to be box 0. These are derived from product i.d. registers.
unsigned short i2eChannelMap[ABS_MAX_BOXES];
// Same as above, except each is derived from firmware attempting to detect
// the uart presence (by reading a valid GFRCR register). If bits are set in
// i2eChannelMap and not in i2eGoodMap, there is a potential problem.
unsigned short i2eGoodMap[ABS_MAX_BOXES];
// ---------------------------
// For indirect function calls
// Routine to cause an N-millisecond delay: Patched by the ii2Initialize
// function.
void (*i2eDelay)(unsigned int);
// Routine to write N bytes to the board through the FIFO. Returns true if
// all copacetic, otherwise returns false and error is in i2eError field.
// IF COUNT IS ODD, ROUNDS UP TO THE NEXT EVEN NUMBER.
int (*i2eWriteBuf)(struct _i2eBordStr *, unsigned char *, int);
// Routine to read N bytes from the board through the FIFO. Returns true if
// copacetic, otherwise returns false and error in i2eError.
// IF COUNT IS ODD, ROUNDS UP TO THE NEXT EVEN NUMBER.
int (*i2eReadBuf)(struct _i2eBordStr *, unsigned char *, int);
// Returns a word from FIFO. Will use 2 byte operations if needed.
unsigned short (*i2eReadWord)(struct _i2eBordStr *);
// Writes a word to FIFO. Will use 2 byte operations if needed.
void (*i2eWriteWord)(struct _i2eBordStr *, unsigned short);
// Waits specified time for the Transmit FIFO to go empty. Returns true if
// ok, otherwise returns false and error in i2eError.
int (*i2eWaitForTxEmpty)(struct _i2eBordStr *, int);
// Returns true or false according to whether the outgoing mailbox is empty.
int (*i2eTxMailEmpty)(struct _i2eBordStr *);
// Checks whether outgoing mailbox is empty. If so, sends mail and returns
// true. Otherwise returns false.
int (*i2eTrySendMail)(struct _i2eBordStr *, unsigned char);
// If no mail available, returns NO_MAIL_HERE, else returns the value in the
// mailbox (guaranteed can't be NO_MAIL_HERE).
unsigned short (*i2eGetMail)(struct _i2eBordStr *);
// Enables the board to interrupt the host when it writes to the mailbox.
// Irqs will not occur, however, until the loadware separately enables
// interrupt generation to the host. The standard loadware does this in
// response to a command packet sent by the host. (Also, disables
// any other potential interrupt sources from the board -- other than the
// inbound mailbox).
void (*i2eEnableMailIrq)(struct _i2eBordStr *);
// Writes an arbitrary value to the mask register.
void (*i2eWriteMask)(struct _i2eBordStr *, unsigned char);
// State information
// During downloading, indicates the number of blocks remaining to download
// to the board.
short i2eToLoad;
// State of board (see manifests below) (e.g., whether in reset condition,
// whether standard loadware is installed, etc.
unsigned char i2eState;
// These three fields are only valid when there is loadware running on the
// board. (i2eState == II_STATE_LOADED or i2eState == II_STATE_STDLOADED )
unsigned char i2eLVersion; // Loadware version
unsigned char i2eLRevision; // Loadware revision
unsigned char i2eLSub; // Loadware subrevision
// Flags which only have meaning in the context of the standard loadware.
// Somewhat violates the layering concept, but there is so little additional
// needed at the board level (while much additional at the channel level),
// that this beats maintaining two different per-board structures.
// Indicates which IRQ the board has been initialized (from software) to use
// For MicroChannel boards, any value different from IRQ_UNDEFINED means
// that the software command has been sent to enable interrupts (or specify
// they are disabled). Special value: IRQ_UNDEFINED indicates that the
// software command to select the interrupt has not yet been sent, therefore
// (since the standard loadware insists that it be sent before any other
// packets are sent) no other packets should be sent yet.
unsigned short i2eUsingIrq;
// This is set when we hit the MB_OUT_STUFFED mailbox, which prevents us
// putting more in the mailbox until an appropriate mailbox message is
// received.
unsigned char i2eWaitingForEmptyFifo;
// Any mailbox bits waiting to be sent to the board are OR'ed in here.
unsigned char i2eOutMailWaiting;
// The head of any incoming packet is read into here, is then examined and
// we dispatch accordingly.
unsigned short i2eLeadoffWord[1];
// Running counter of interrupts where the mailbox indicated incoming data.
unsigned short i2eFifoInInts;
// Running counter of interrupts where the mailbox indicated outgoing data
// had been stripped.
unsigned short i2eFifoOutInts;
// If not void, gives the address of a routine to call if fatal board error
// is found (only applies to standard l/w).
void (*i2eFatalTrap)(struct _i2eBordStr *);
// Will point to an array of some sort of channel structures (whose format
// is unknown at this level, being a function of what loadware is
// installed and the code configuration (max sizes of buffers, etc.)).
void *i2eChannelPtr;
// Set indicates that the board has gone fatal.
unsigned short i2eFatal;
// The number of elements pointed to by i2eChannelPtr.
unsigned short i2eChannelCnt;
// Ring-buffers of channel structures whose channels have particular needs.
rwlock_t Fbuf_spinlock;
volatile
unsigned short i2Fbuf_strip; // Strip index
volatile
unsigned short i2Fbuf_stuff; // Stuff index
void *i2Fbuf[CH_QUEUE_SIZE]; // An array of channel pointers
// of channels who need to send
// flow control packets.
rwlock_t Dbuf_spinlock;
volatile
unsigned short i2Dbuf_strip; // Strip index
volatile
unsigned short i2Dbuf_stuff; // Stuff index
void *i2Dbuf[CH_QUEUE_SIZE]; // An array of channel pointers
// of channels who need to send
// data or in-line command packets.
rwlock_t Bbuf_spinlock;
volatile
unsigned short i2Bbuf_strip; // Strip index
volatile
unsigned short i2Bbuf_stuff; // Stuff index
void *i2Bbuf[CH_QUEUE_SIZE]; // An array of channel pointers
// of channels who need to send
// bypass command packets.
/*
* A set of flags to indicate that certain events have occurred on at least
* one of the ports on this board. We use this to decide whether to spin
* through the channels looking for breaks, etc.
*/
int got_input;
int status_change;
bidStat channelBtypes;
/*
* Debugging counters, etc.
*/
unsigned long debugFlowQueued;
unsigned long debugInlineQueued;
unsigned long debugDataQueued;
unsigned long debugBypassQueued;
unsigned long debugFlowCount;
unsigned long debugInlineCount;
unsigned long debugBypassCount;
rwlock_t read_fifo_spinlock;
rwlock_t write_fifo_spinlock;
// For queuing interrupt bottom half handlers. /\/\|=mhw=|\/\/
struct work_struct tqueue_interrupt;
struct timer_list SendPendingTimer; // Used by iiSendPending
unsigned int SendPendingRetry;
} i2eBordStr, *i2eBordStrPtr;
//-------------------------------------------------------------------
// Macro Definitions for the indirect calls defined in the i2eBordStr
//-------------------------------------------------------------------
//
#define iiDelay(a,b) (*(a)->i2eDelay)(b)
#define iiWriteBuf(a,b,c) (*(a)->i2eWriteBuf)(a,b,c)
#define iiReadBuf(a,b,c) (*(a)->i2eReadBuf)(a,b,c)
#define iiWriteWord(a,b) (*(a)->i2eWriteWord)(a,b)
#define iiReadWord(a) (*(a)->i2eReadWord)(a)
#define iiWaitForTxEmpty(a,b) (*(a)->i2eWaitForTxEmpty)(a,b)
#define iiTxMailEmpty(a) (*(a)->i2eTxMailEmpty)(a)
#define iiTrySendMail(a,b) (*(a)->i2eTrySendMail)(a,b)
#define iiGetMail(a) (*(a)->i2eGetMail)(a)
#define iiEnableMailIrq(a) (*(a)->i2eEnableMailIrq)(a)
#define iiDisableMailIrq(a) (*(a)->i2eWriteMask)(a,0)
#define iiWriteMask(a,b) (*(a)->i2eWriteMask)(a,b)
//-------------------------------------------
// Manifests for i2eBordStr:
//-------------------------------------------
#define YES 1
#define NO 0
#define NULLFUNC (void (*)(void))0
#define NULLPTR (void *)0
typedef void (*delayFunc_t)(unsigned int);
// i2eValid
//
#define I2E_MAGIC 0x4251 // Structure is valid.
#define I2E_INCOMPLETE 0x1122 // Structure failed during init.
// i2eError
//
#define I2EE_GOOD 0 // Operation successful
#define I2EE_BADADDR 1 // Address out of range
#define I2EE_BADSTATE 2 // Attempt to perform a function when the board
// structure was in the incorrect state
#define I2EE_BADMAGIC 3 // Bad magic number from Power On test (i2ePomSize
// reflects what was read
#define I2EE_PORM_SHORT 4 // Power On message too short
#define I2EE_PORM_LONG 5 // Power On message too long
#define I2EE_BAD_FAMILY 6 // Un-supported board family type
#define I2EE_INCONSIST 7 // Firmware reports something impossible,
// e.g. unexpected number of ports... Almost no
// excuse other than bad FIFO...
#define I2EE_POSTERR 8 // Power-On self test reported a bad error
#define I2EE_BADBUS 9 // Unknown Bus type declared in message
#define I2EE_TXE_TIME 10 // Timed out waiting for TX Fifo to empty
#define I2EE_INVALID 11 // i2eValid field does not indicate a valid and
// complete board structure (for functions which
// require this be so.)
#define I2EE_BAD_PORT 12 // Discrepancy between channels actually found and
// what the product is supposed to have. Check
// i2eGoodMap vs i2eChannelMap for details.
#define I2EE_BAD_IRQ 13 // Someone specified an unsupported IRQ
#define I2EE_NOCHANNELS 14 // No channel structures have been defined (for
// functions requiring this).
// i2eFifoStyle
//
#define FIFO_II 0 /* IntelliPort-II style: see also i2hw.h */
#define FIFO_IIEX 1 /* IntelliPort-IIEX style */
// i2eGetMail
//
#define NO_MAIL_HERE 0x1111 // Since mail is unsigned char, cannot possibly
// promote to 0x1111.
// i2eState
//
#define II_STATE_COLD 0 // Addresses have been defined, but board not even
// reset yet.
#define II_STATE_RESET 1 // Board,if it exists, has just been reset
#define II_STATE_READY 2 // Board ready for its first block
#define II_STATE_LOADING 3 // Board continuing load
#define II_STATE_LOADED 4 // Board has finished load: status ok
#define II_STATE_BADLOAD 5 // Board has finished load: failed!
#define II_STATE_STDLOADED 6 // Board has finished load: standard firmware
// i2eUsingIrq
//
#define IRQ_UNDEFINED 0x1352 // No valid irq (or polling = 0) can ever
// promote to this!
//------------------------------------------
// Handy Macros for i2ellis.c and others
// Note these are common to -II and -IIEX
//------------------------------------------
// Given a pointer to the board structure, does the input FIFO have any data or
// not?
//
#define HAS_INPUT(pB) !(INB(pB->i2eStatus) & ST_IN_EMPTY)
#define HAS_NO_INPUT(pB) (INB(pB->i2eStatus) & ST_IN_EMPTY)
// Given a pointer to board structure, read a byte or word from the fifo
//
#define BYTE_FROM(pB) (unsigned char)INB(pB->i2eData)
#define WORD_FROM(pB) (unsigned short)INW(pB->i2eData)
// Given a pointer to board structure, is there room for any data to be written
// to the data fifo?
//
#define HAS_OUTROOM(pB) !(INB(pB->i2eStatus) & ST_OUT_FULL)
#define HAS_NO_OUTROOM(pB) (INB(pB->i2eStatus) & ST_OUT_FULL)
// Given a pointer to board structure, write a single byte to the fifo
// structure. Note that for 16-bit interfaces, the high order byte is undefined
// and unknown.
//
#define BYTE_TO(pB, c) OUTB(pB->i2eData,(c))
// Write a word to the fifo structure. For 8-bit interfaces, this may have
// unknown results.
//
#define WORD_TO(pB, c) OUTW(pB->i2eData,(c))
// Given a pointer to the board structure, is there anything in the incoming
// mailbox?
//
#define HAS_MAIL(pB) (INB(pB->i2eStatus) & ST_IN_MAIL)
#define UPDATE_FIFO_ROOM(pB) (pB)->i2eFifoRemains=(pB)->i2eFifoSize
// Handy macro to round up a number (like the buffer write and read routines do)
//
#define ROUNDUP(number) (((number)+1) & (~1))
//------------------------------------------
// Function Declarations for i2ellis.c
//------------------------------------------
//
// Functions called directly
//
// Initialization of a board & structure is in four (five!) parts:
//
// 0) iiEllisInit() - Initialize iiEllis subsystem.
// 1) iiSetAddress() - Define the board address & delay function for a board.
// 2) iiReset() - Reset the board (provided it exists)
// -- Note you may do this to several boards --
// 3) iiResetDelay() - Delay for 2 seconds (once for all boards)
// 4) iiInitialize() - Attempt to read Power-up message; further initialize
// accelerators
//
// Then you may use iiDownloadAll() or iiDownloadFile() (in i2file.c) to write
// loadware. To change loadware, you must begin again with step 2, resetting
// the board again (step 1 not needed).
static void iiEllisInit(void);
static int iiSetAddress(i2eBordStrPtr, int, delayFunc_t );
static int iiReset(i2eBordStrPtr);
static int iiResetDelay(i2eBordStrPtr);
static int iiInitialize(i2eBordStrPtr);
// Routine to validate that all channels expected are there.
//
extern int iiValidateChannels(i2eBordStrPtr);
// Routine used to download a block of loadware.
//
static int iiDownloadBlock(i2eBordStrPtr, loadHdrStrPtr, int);
// Return values given by iiDownloadBlock, iiDownloadAll, iiDownloadFile:
//
#define II_DOWN_BADVALID 0 // board structure is invalid
#define II_DOWN_CONTINUING 1 // So far, so good, firmware expects more
#define II_DOWN_GOOD 2 // Download complete, CRC good
#define II_DOWN_BAD 3 // Download complete, but CRC bad
#define II_DOWN_BADFILE 4 // Bad magic number in loadware file
#define II_DOWN_BADSTATE 5 // Board is in an inappropriate state for
// downloading loadware. (see i2eState)
#define II_DOWN_TIMEOUT 6 // Timeout waiting for firmware
#define II_DOWN_OVER 7 // Too much data
#define II_DOWN_UNDER 8 // Not enough data
#define II_DOWN_NOFILE 9 // Loadware file not found
// Routine to download an entire loadware module: Return values are a subset of
// iiDownloadBlock's, excluding, of course, II_DOWN_CONTINUING
//
static int iiDownloadAll(i2eBordStrPtr, loadHdrStrPtr, int, int);
// Called indirectly always. Needed externally so the routine might be
// SPECIFIED as an argument to iiReset()
//
//static void ii2DelayIO(unsigned int); // N-millisecond delay using
//hardware spin
//static void ii2DelayTimer(unsigned int); // N-millisecond delay using Linux
//timer
// Many functions defined here return True if good, False otherwise, with an
// error code in i2eError field. Here is a handy macro for setting the error
// code and returning.
//
#define COMPLETE(pB,code) \
do { \
pB->i2eError = code; \
return (code == I2EE_GOOD);\
} while (0)
#endif // I2ELLIS_H
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