istallion.c 123.2 KB
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/*****************************************************************************/

/*
 *	istallion.c  -- stallion intelligent multiport serial driver.
 *
 *	Copyright (C) 1996-1999  Stallion Technologies
 *	Copyright (C) 1994-1996  Greg Ungerer.
 *
 *	This code is loosely based on the Linux serial driver, written by
 *	Linus Torvalds, Theodore T'so and others.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 */

/*****************************************************************************/

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/cdk.h>
#include <linux/comstats.h>
#include <linux/istallion.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/wait.h>
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#include <linux/eisa.h>
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#include <linux/ctype.h>
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#include <asm/io.h>
#include <asm/uaccess.h>

#include <linux/pci.h>

/*****************************************************************************/

/*
 *	Define different board types. Not all of the following board types
 *	are supported by this driver. But I will use the standard "assigned"
 *	board numbers. Currently supported boards are abbreviated as:
 *	ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
 *	STAL = Stallion.
 */
#define	BRD_UNKNOWN	0
#define	BRD_STALLION	1
#define	BRD_BRUMBY4	2
#define	BRD_ONBOARD2	3
#define	BRD_ONBOARD	4
#define	BRD_ONBOARDE	7
#define	BRD_ECP		23
#define BRD_ECPE	24
#define	BRD_ECPMC	25
#define	BRD_ECPPCI	29

#define	BRD_BRUMBY	BRD_BRUMBY4

/*
 *	Define a configuration structure to hold the board configuration.
 *	Need to set this up in the code (for now) with the boards that are
 *	to be configured into the system. This is what needs to be modified
 *	when adding/removing/modifying boards. Each line entry in the
 *	stli_brdconf[] array is a board. Each line contains io/irq/memory
 *	ranges for that board (as well as what type of board it is).
 *	Some examples:
 *		{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
 *	This line will configure an EasyConnection 8/64 at io address 2a0,
 *	and shared memory address of cc000. Multiple EasyConnection 8/64
 *	boards can share the same shared memory address space. No interrupt
 *	is required for this board type.
 *	Another example:
 *		{ BRD_ECPE, 0x5000, 0, 0x80000000, 0, 0 },
 *	This line will configure an EasyConnection 8/64 EISA in slot 5 and
 *	shared memory address of 0x80000000 (2 GByte). Multiple
 *	EasyConnection 8/64 EISA boards can share the same shared memory
 *	address space. No interrupt is required for this board type.
 *	Another example:
 *		{ BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
 *	This line will configure an ONboard (ISA type) at io address 240,
 *	and shared memory address of d0000. Multiple ONboards can share
 *	the same shared memory address space. No interrupt required.
 *	Another example:
 *		{ BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
 *	This line will configure a Brumby board (any number of ports!) at
 *	io address 360 and shared memory address of c8000. All Brumby boards
 *	configured into a system must have their own separate io and memory
 *	addresses. No interrupt is required.
 *	Another example:
 *		{ BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
 *	This line will configure an original Stallion board at io address 330
 *	and shared memory address d0000 (this would only be valid for a "V4.0"
 *	or Rev.O Stallion board). All Stallion boards configured into the
 *	system must have their own separate io and memory addresses. No
 *	interrupt is required.
 */

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struct stlconf {
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	int		brdtype;
	int		ioaddr1;
	int		ioaddr2;
	unsigned long	memaddr;
	int		irq;
	int		irqtype;
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};
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static unsigned int stli_nrbrds;
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/* stli_lock must NOT be taken holding brd_lock */
static spinlock_t stli_lock;	/* TTY logic lock */
static spinlock_t brd_lock;	/* Board logic lock */

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/*
 *	There is some experimental EISA board detection code in this driver.
 *	By default it is disabled, but for those that want to try it out,
 *	then set the define below to be 1.
 */
#define	STLI_EISAPROBE	0

/*****************************************************************************/

/*
 *	Define some important driver characteristics. Device major numbers
 *	allocated as per Linux Device Registry.
 */
#ifndef	STL_SIOMEMMAJOR
#define	STL_SIOMEMMAJOR		28
#endif
#ifndef	STL_SERIALMAJOR
#define	STL_SERIALMAJOR		24
#endif
#ifndef	STL_CALLOUTMAJOR
#define	STL_CALLOUTMAJOR	25
#endif

/*****************************************************************************/

/*
 *	Define our local driver identity first. Set up stuff to deal with
 *	all the local structures required by a serial tty driver.
 */
static char	*stli_drvtitle = "Stallion Intelligent Multiport Serial Driver";
static char	*stli_drvname = "istallion";
static char	*stli_drvversion = "5.6.0";
static char	*stli_serialname = "ttyE";

static struct tty_driver	*stli_serial;


#define	STLI_TXBUFSIZE		4096

/*
 *	Use a fast local buffer for cooked characters. Typically a whole
 *	bunch of cooked characters come in for a port, 1 at a time. So we
 *	save those up into a local buffer, then write out the whole lot
 *	with a large memcpy. Just use 1 buffer for all ports, since its
 *	use it is only need for short periods of time by each port.
 */
static char			*stli_txcookbuf;
static int			stli_txcooksize;
static int			stli_txcookrealsize;
static struct tty_struct	*stli_txcooktty;

/*
 *	Define a local default termios struct. All ports will be created
 *	with this termios initially. Basically all it defines is a raw port
 *	at 9600 baud, 8 data bits, no parity, 1 stop bit.
 */
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static struct ktermios		stli_deftermios = {
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	.c_cflag	= (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
	.c_cc		= INIT_C_CC,
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	.c_ispeed	= 9600,
	.c_ospeed	= 9600,
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};

/*
 *	Define global stats structures. Not used often, and can be
 *	re-used for each stats call.
 */
static comstats_t	stli_comstats;
static combrd_t		stli_brdstats;
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static struct asystats	stli_cdkstats;
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/*****************************************************************************/

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static DEFINE_MUTEX(stli_brdslock);
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static struct stlibrd	*stli_brds[STL_MAXBRDS];
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static int		stli_shared;

/*
 *	Per board state flags. Used with the state field of the board struct.
 *	Not really much here... All we need to do is keep track of whether
 *	the board has been detected, and whether it is actually running a slave
 *	or not.
 */
#define	BST_FOUND	0x1
#define	BST_STARTED	0x2
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#define	BST_PROBED	0x4
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/*
 *	Define the set of port state flags. These are marked for internal
 *	state purposes only, usually to do with the state of communications
 *	with the slave. Most of them need to be updated atomically, so always
 *	use the bit setting operations (unless protected by cli/sti).
 */
#define	ST_INITIALIZING	1
#define	ST_OPENING	2
#define	ST_CLOSING	3
#define	ST_CMDING	4
#define	ST_TXBUSY	5
#define	ST_RXING	6
#define	ST_DOFLUSHRX	7
#define	ST_DOFLUSHTX	8
#define	ST_DOSIGS	9
#define	ST_RXSTOP	10
#define	ST_GETSIGS	11

/*
 *	Define an array of board names as printable strings. Handy for
 *	referencing boards when printing trace and stuff.
 */
static char	*stli_brdnames[] = {
	"Unknown",
	"Stallion",
	"Brumby",
	"ONboard-MC",
	"ONboard",
	"Brumby",
	"Brumby",
	"ONboard-EI",
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	NULL,
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	"ONboard",
	"ONboard-MC",
	"ONboard-MC",
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	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
	NULL,
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	"EasyIO",
	"EC8/32-AT",
	"EC8/32-MC",
	"EC8/64-AT",
	"EC8/64-EI",
	"EC8/64-MC",
	"EC8/32-PCI",
	"EC8/64-PCI",
	"EasyIO-PCI",
	"EC/RA-PCI",
};

/*****************************************************************************/

/*
 *	Define some string labels for arguments passed from the module
 *	load line. These allow for easy board definitions, and easy
 *	modification of the io, memory and irq resoucres.
 */

static char	*board0[8];
static char	*board1[8];
static char	*board2[8];
static char	*board3[8];

static char	**stli_brdsp[] = {
	(char **) &board0,
	(char **) &board1,
	(char **) &board2,
	(char **) &board3
};

/*
 *	Define a set of common board names, and types. This is used to
 *	parse any module arguments.
 */

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static struct stlibrdtype {
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	char	*name;
	int	type;
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} stli_brdstr[] = {
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	{ "stallion", BRD_STALLION },
	{ "1", BRD_STALLION },
	{ "brumby", BRD_BRUMBY },
	{ "brumby4", BRD_BRUMBY },
	{ "brumby/4", BRD_BRUMBY },
	{ "brumby-4", BRD_BRUMBY },
	{ "brumby8", BRD_BRUMBY },
	{ "brumby/8", BRD_BRUMBY },
	{ "brumby-8", BRD_BRUMBY },
	{ "brumby16", BRD_BRUMBY },
	{ "brumby/16", BRD_BRUMBY },
	{ "brumby-16", BRD_BRUMBY },
	{ "2", BRD_BRUMBY },
	{ "onboard2", BRD_ONBOARD2 },
	{ "onboard-2", BRD_ONBOARD2 },
	{ "onboard/2", BRD_ONBOARD2 },
	{ "onboard-mc", BRD_ONBOARD2 },
	{ "onboard/mc", BRD_ONBOARD2 },
	{ "onboard-mca", BRD_ONBOARD2 },
	{ "onboard/mca", BRD_ONBOARD2 },
	{ "3", BRD_ONBOARD2 },
	{ "onboard", BRD_ONBOARD },
	{ "onboardat", BRD_ONBOARD },
	{ "4", BRD_ONBOARD },
	{ "onboarde", BRD_ONBOARDE },
	{ "onboard-e", BRD_ONBOARDE },
	{ "onboard/e", BRD_ONBOARDE },
	{ "onboard-ei", BRD_ONBOARDE },
	{ "onboard/ei", BRD_ONBOARDE },
	{ "7", BRD_ONBOARDE },
	{ "ecp", BRD_ECP },
	{ "ecpat", BRD_ECP },
	{ "ec8/64", BRD_ECP },
	{ "ec8/64-at", BRD_ECP },
	{ "ec8/64-isa", BRD_ECP },
	{ "23", BRD_ECP },
	{ "ecpe", BRD_ECPE },
	{ "ecpei", BRD_ECPE },
	{ "ec8/64-e", BRD_ECPE },
	{ "ec8/64-ei", BRD_ECPE },
	{ "24", BRD_ECPE },
	{ "ecpmc", BRD_ECPMC },
	{ "ec8/64-mc", BRD_ECPMC },
	{ "ec8/64-mca", BRD_ECPMC },
	{ "25", BRD_ECPMC },
	{ "ecppci", BRD_ECPPCI },
	{ "ec/ra", BRD_ECPPCI },
	{ "ec/ra-pc", BRD_ECPPCI },
	{ "ec/ra-pci", BRD_ECPPCI },
	{ "29", BRD_ECPPCI },
};

/*
 *	Define the module agruments.
 */
MODULE_AUTHOR("Greg Ungerer");
MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver");
MODULE_LICENSE("GPL");


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module_param_array(board0, charp, NULL, 0);
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MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]");
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module_param_array(board1, charp, NULL, 0);
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MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]");
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module_param_array(board2, charp, NULL, 0);
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MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]");
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module_param_array(board3, charp, NULL, 0);
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MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]");

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#if STLI_EISAPROBE != 0
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/*
 *	Set up a default memory address table for EISA board probing.
 *	The default addresses are all bellow 1Mbyte, which has to be the
 *	case anyway. They should be safe, since we only read values from
 *	them, and interrupts are disabled while we do it. If the higher
 *	memory support is compiled in then we also try probing around
 *	the 1Gb, 2Gb and 3Gb areas as well...
 */
static unsigned long	stli_eisamemprobeaddrs[] = {
	0xc0000,    0xd0000,    0xe0000,    0xf0000,
	0x80000000, 0x80010000, 0x80020000, 0x80030000,
	0x40000000, 0x40010000, 0x40020000, 0x40030000,
	0xc0000000, 0xc0010000, 0xc0020000, 0xc0030000,
	0xff000000, 0xff010000, 0xff020000, 0xff030000,
};

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static int	stli_eisamempsize = ARRAY_SIZE(stli_eisamemprobeaddrs);
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#endif
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/*
 *	Define the Stallion PCI vendor and device IDs.
 */
#ifndef PCI_DEVICE_ID_ECRA
#define	PCI_DEVICE_ID_ECRA		0x0004
#endif

static struct pci_device_id istallion_pci_tbl[] = {
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	{ PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA), },
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	{ 0 }
};
MODULE_DEVICE_TABLE(pci, istallion_pci_tbl);

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static struct pci_driver stli_pcidriver;
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/*****************************************************************************/

/*
 *	Hardware configuration info for ECP boards. These defines apply
 *	to the directly accessible io ports of the ECP. There is a set of
 *	defines for each ECP board type, ISA, EISA, MCA and PCI.
 */
#define	ECP_IOSIZE	4

#define	ECP_MEMSIZE	(128 * 1024)
#define	ECP_PCIMEMSIZE	(256 * 1024)

#define	ECP_ATPAGESIZE	(4 * 1024)
#define	ECP_MCPAGESIZE	(4 * 1024)
#define	ECP_EIPAGESIZE	(64 * 1024)
#define	ECP_PCIPAGESIZE	(64 * 1024)

#define	STL_EISAID	0x8c4e

/*
 *	Important defines for the ISA class of ECP board.
 */
#define	ECP_ATIREG	0
#define	ECP_ATCONFR	1
#define	ECP_ATMEMAR	2
#define	ECP_ATMEMPR	3
#define	ECP_ATSTOP	0x1
#define	ECP_ATINTENAB	0x10
#define	ECP_ATENABLE	0x20
#define	ECP_ATDISABLE	0x00
#define	ECP_ATADDRMASK	0x3f000
#define	ECP_ATADDRSHFT	12

/*
 *	Important defines for the EISA class of ECP board.
 */
#define	ECP_EIIREG	0
#define	ECP_EIMEMARL	1
#define	ECP_EICONFR	2
#define	ECP_EIMEMARH	3
#define	ECP_EIENABLE	0x1
#define	ECP_EIDISABLE	0x0
#define	ECP_EISTOP	0x4
#define	ECP_EIEDGE	0x00
#define	ECP_EILEVEL	0x80
#define	ECP_EIADDRMASKL	0x00ff0000
#define	ECP_EIADDRSHFTL	16
#define	ECP_EIADDRMASKH	0xff000000
#define	ECP_EIADDRSHFTH	24
#define	ECP_EIBRDENAB	0xc84

#define	ECP_EISAID	0x4

/*
 *	Important defines for the Micro-channel class of ECP board.
 *	(It has a lot in common with the ISA boards.)
 */
#define	ECP_MCIREG	0
#define	ECP_MCCONFR	1
#define	ECP_MCSTOP	0x20
#define	ECP_MCENABLE	0x80
#define	ECP_MCDISABLE	0x00

/*
 *	Important defines for the PCI class of ECP board.
 *	(It has a lot in common with the other ECP boards.)
 */
#define	ECP_PCIIREG	0
#define	ECP_PCICONFR	1
#define	ECP_PCISTOP	0x01

/*
 *	Hardware configuration info for ONboard and Brumby boards. These
 *	defines apply to the directly accessible io ports of these boards.
 */
#define	ONB_IOSIZE	16
#define	ONB_MEMSIZE	(64 * 1024)
#define	ONB_ATPAGESIZE	(64 * 1024)
#define	ONB_MCPAGESIZE	(64 * 1024)
#define	ONB_EIMEMSIZE	(128 * 1024)
#define	ONB_EIPAGESIZE	(64 * 1024)

/*
 *	Important defines for the ISA class of ONboard board.
 */
#define	ONB_ATIREG	0
#define	ONB_ATMEMAR	1
#define	ONB_ATCONFR	2
#define	ONB_ATSTOP	0x4
#define	ONB_ATENABLE	0x01
#define	ONB_ATDISABLE	0x00
#define	ONB_ATADDRMASK	0xff0000
#define	ONB_ATADDRSHFT	16

#define	ONB_MEMENABLO	0
#define	ONB_MEMENABHI	0x02

/*
 *	Important defines for the EISA class of ONboard board.
 */
#define	ONB_EIIREG	0
#define	ONB_EIMEMARL	1
#define	ONB_EICONFR	2
#define	ONB_EIMEMARH	3
#define	ONB_EIENABLE	0x1
#define	ONB_EIDISABLE	0x0
#define	ONB_EISTOP	0x4
#define	ONB_EIEDGE	0x00
#define	ONB_EILEVEL	0x80
#define	ONB_EIADDRMASKL	0x00ff0000
#define	ONB_EIADDRSHFTL	16
#define	ONB_EIADDRMASKH	0xff000000
#define	ONB_EIADDRSHFTH	24
#define	ONB_EIBRDENAB	0xc84

#define	ONB_EISAID	0x1

/*
 *	Important defines for the Brumby boards. They are pretty simple,
 *	there is not much that is programmably configurable.
 */
#define	BBY_IOSIZE	16
#define	BBY_MEMSIZE	(64 * 1024)
#define	BBY_PAGESIZE	(16 * 1024)

#define	BBY_ATIREG	0
#define	BBY_ATCONFR	1
#define	BBY_ATSTOP	0x4

/*
 *	Important defines for the Stallion boards. They are pretty simple,
 *	there is not much that is programmably configurable.
 */
#define	STAL_IOSIZE	16
#define	STAL_MEMSIZE	(64 * 1024)
#define	STAL_PAGESIZE	(64 * 1024)

/*
 *	Define the set of status register values for EasyConnection panels.
 *	The signature will return with the status value for each panel. From
 *	this we can determine what is attached to the board - before we have
 *	actually down loaded any code to it.
 */
#define	ECH_PNLSTATUS	2
#define	ECH_PNL16PORT	0x20
#define	ECH_PNLIDMASK	0x07
#define	ECH_PNLXPID	0x40
#define	ECH_PNLINTRPEND	0x80

/*
 *	Define some macros to do things to the board. Even those these boards
 *	are somewhat related there is often significantly different ways of
 *	doing some operation on it (like enable, paging, reset, etc). So each
 *	board class has a set of functions which do the commonly required
 *	operations. The macros below basically just call these functions,
 *	generally checking for a NULL function - which means that the board
 *	needs nothing done to it to achieve this operation!
 */
#define	EBRDINIT(brdp)						\
	if (brdp->init != NULL)					\
		(* brdp->init)(brdp)

#define	EBRDENABLE(brdp)					\
	if (brdp->enable != NULL)				\
		(* brdp->enable)(brdp);

#define	EBRDDISABLE(brdp)					\
	if (brdp->disable != NULL)				\
		(* brdp->disable)(brdp);

#define	EBRDINTR(brdp)						\
	if (brdp->intr != NULL)					\
		(* brdp->intr)(brdp);

#define	EBRDRESET(brdp)						\
	if (brdp->reset != NULL)				\
		(* brdp->reset)(brdp);

#define	EBRDGETMEMPTR(brdp,offset)				\
	(* brdp->getmemptr)(brdp, offset, __LINE__)

/*
 *	Define the maximal baud rate, and the default baud base for ports.
 */
#define	STL_MAXBAUD	460800
#define	STL_BAUDBASE	115200
#define	STL_CLOSEDELAY	(5 * HZ / 10)

/*****************************************************************************/

/*
 *	Define macros to extract a brd or port number from a minor number.
 */
#define	MINOR2BRD(min)		(((min) & 0xc0) >> 6)
#define	MINOR2PORT(min)		((min) & 0x3f)

/*****************************************************************************/

/*
 *	Prototype all functions in this driver!
 */

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static int	stli_parsebrd(struct stlconf *confp, char **argp);
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static int	stli_init(void);
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static int	stli_open(struct tty_struct *tty, struct file *filp);
static void	stli_close(struct tty_struct *tty, struct file *filp);
static int	stli_write(struct tty_struct *tty, const unsigned char *buf, int count);
static void	stli_putchar(struct tty_struct *tty, unsigned char ch);
static void	stli_flushchars(struct tty_struct *tty);
static int	stli_writeroom(struct tty_struct *tty);
static int	stli_charsinbuffer(struct tty_struct *tty);
static int	stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
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static void	stli_settermios(struct tty_struct *tty, struct ktermios *old);
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static void	stli_throttle(struct tty_struct *tty);
static void	stli_unthrottle(struct tty_struct *tty);
static void	stli_stop(struct tty_struct *tty);
static void	stli_start(struct tty_struct *tty);
static void	stli_flushbuffer(struct tty_struct *tty);
static void	stli_breakctl(struct tty_struct *tty, int state);
static void	stli_waituntilsent(struct tty_struct *tty, int timeout);
static void	stli_sendxchar(struct tty_struct *tty, char ch);
static void	stli_hangup(struct tty_struct *tty);
617
static int	stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos);
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619 620
static int	stli_brdinit(struct stlibrd *brdp);
static int	stli_startbrd(struct stlibrd *brdp);
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static ssize_t	stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp);
static ssize_t	stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp);
static int	stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
624
static void	stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp);
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static void	stli_poll(unsigned long arg);
626 627 628 629 630
static int	stli_hostcmd(struct stlibrd *brdp, struct stliport *portp);
static int	stli_initopen(struct stlibrd *brdp, struct stliport *portp);
static int	stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
static int	stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
static int	stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp);
631
static void	stli_dohangup(struct work_struct *);
632 633 634 635 636 637
static int	stli_setport(struct stliport *portp);
static int	stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	__stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp);
static void	stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp);
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static void	stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
static long	stli_mktiocm(unsigned long sigvalue);
640 641 642
static void	stli_read(struct stlibrd *brdp, struct stliport *portp);
static int	stli_getserial(struct stliport *portp, struct serial_struct __user *sp);
static int	stli_setserial(struct stliport *portp, struct serial_struct __user *sp);
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static int	stli_getbrdstats(combrd_t __user *bp);
644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686
static int	stli_getportstats(struct stliport *portp, comstats_t __user *cp);
static int	stli_portcmdstats(struct stliport *portp);
static int	stli_clrportstats(struct stliport *portp, comstats_t __user *cp);
static int	stli_getportstruct(struct stliport __user *arg);
static int	stli_getbrdstruct(struct stlibrd __user *arg);
static struct stlibrd *stli_allocbrd(void);

static void	stli_ecpinit(struct stlibrd *brdp);
static void	stli_ecpenable(struct stlibrd *brdp);
static void	stli_ecpdisable(struct stlibrd *brdp);
static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_ecpreset(struct stlibrd *brdp);
static void	stli_ecpintr(struct stlibrd *brdp);
static void	stli_ecpeiinit(struct stlibrd *brdp);
static void	stli_ecpeienable(struct stlibrd *brdp);
static void	stli_ecpeidisable(struct stlibrd *brdp);
static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_ecpeireset(struct stlibrd *brdp);
static void	stli_ecpmcenable(struct stlibrd *brdp);
static void	stli_ecpmcdisable(struct stlibrd *brdp);
static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_ecpmcreset(struct stlibrd *brdp);
static void	stli_ecppciinit(struct stlibrd *brdp);
static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_ecppcireset(struct stlibrd *brdp);

static void	stli_onbinit(struct stlibrd *brdp);
static void	stli_onbenable(struct stlibrd *brdp);
static void	stli_onbdisable(struct stlibrd *brdp);
static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_onbreset(struct stlibrd *brdp);
static void	stli_onbeinit(struct stlibrd *brdp);
static void	stli_onbeenable(struct stlibrd *brdp);
static void	stli_onbedisable(struct stlibrd *brdp);
static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_onbereset(struct stlibrd *brdp);
static void	stli_bbyinit(struct stlibrd *brdp);
static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_bbyreset(struct stlibrd *brdp);
static void	stli_stalinit(struct stlibrd *brdp);
static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line);
static void	stli_stalreset(struct stlibrd *brdp);

687
static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr, unsigned int portnr);
688 689 690

static int	stli_initecp(struct stlibrd *brdp);
static int	stli_initonb(struct stlibrd *brdp);
691
#if STLI_EISAPROBE != 0
692
static int	stli_eisamemprobe(struct stlibrd *brdp);
693
#endif
694
static int	stli_initports(struct stlibrd *brdp);
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/*****************************************************************************/

/*
 *	Define the driver info for a user level shared memory device. This
 *	device will work sort of like the /dev/kmem device - except that it
 *	will give access to the shared memory on the Stallion intelligent
 *	board. This is also a very useful debugging tool.
 */
704
static const struct file_operations	stli_fsiomem = {
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	.owner		= THIS_MODULE,
	.read		= stli_memread,
	.write		= stli_memwrite,
	.ioctl		= stli_memioctl,
};

/*****************************************************************************/

/*
 *	Define a timer_list entry for our poll routine. The slave board
 *	is polled every so often to see if anything needs doing. This is
 *	much cheaper on host cpu than using interrupts. It turns out to
 *	not increase character latency by much either...
 */
719
static DEFINE_TIMER(stli_timerlist, stli_poll, 0, 0);
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static int	stli_timeron;

/*
 *	Define the calculation for the timeout routine.
 */
#define	STLI_TIMEOUT	(jiffies + 1)

/*****************************************************************************/

730
static struct class *istallion_class;
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732
static void stli_cleanup_ports(struct stlibrd *brdp)
733
{
734
	struct stliport *portp;
735 736 737 738 739 740 741 742 743 744 745 746
	unsigned int j;

	for (j = 0; j < STL_MAXPORTS; j++) {
		portp = brdp->ports[j];
		if (portp != NULL) {
			if (portp->tty != NULL)
				tty_hangup(portp->tty);
			kfree(portp);
		}
	}
}

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/*
 *	Loadable module initialization stuff.
 */

static int __init istallion_module_init(void)
{
	stli_init();
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	return 0;
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}

/*****************************************************************************/

static void __exit istallion_module_exit(void)
{
761
	struct stlibrd	*brdp;
762
	unsigned int j;
763
	int		i;
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	printk(KERN_INFO "Unloading %s: version %s\n", stli_drvtitle,
		stli_drvversion);

768
	pci_unregister_driver(&stli_pcidriver);
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	/*
	 *	Free up all allocated resources used by the ports. This includes
	 *	memory and interrupts.
	 */
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	if (stli_timeron) {
		stli_timeron = 0;
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		del_timer_sync(&stli_timerlist);
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	}

	i = tty_unregister_driver(stli_serial);
	put_tty_driver(stli_serial);
780 781
	for (j = 0; j < 4; j++)
		class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, j));
782
	class_destroy(istallion_class);
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	if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
		printk("STALLION: failed to un-register serial memory device, "
			"errno=%d\n", -i);
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	kfree(stli_txcookbuf);
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789
	for (j = 0; (j < stli_nrbrds); j++) {
790
		if ((brdp = stli_brds[j]) == NULL || (brdp->state & BST_PROBED))
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			continue;
792 793

		stli_cleanup_ports(brdp);
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		iounmap(brdp->membase);
		if (brdp->iosize > 0)
			release_region(brdp->iobase, brdp->iosize);
		kfree(brdp);
799
		stli_brds[j] = NULL;
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	}
}

module_init(istallion_module_init);
module_exit(istallion_module_exit);

/*****************************************************************************/

/*
 *	Parse the supplied argument string, into the board conf struct.
 */

812
static int stli_parsebrd(struct stlconf *confp, char **argp)
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{
814
	unsigned int i;
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	char *sp;
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	if (argp[0] == NULL || *argp[0] == 0)
		return 0;
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	for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
821
		*sp = tolower(*sp);
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823
	for (i = 0; i < ARRAY_SIZE(stli_brdstr); i++) {
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		if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
			break;
	}
827
	if (i == ARRAY_SIZE(stli_brdstr)) {
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		printk("STALLION: unknown board name, %s?\n", argp[0]);
829
		return 0;
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	}

	confp->brdtype = stli_brdstr[i].type;
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	if (argp[1] != NULL && *argp[1] != 0)
834
		confp->ioaddr1 = simple_strtoul(argp[1], NULL, 0);
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	if (argp[2] !=  NULL && *argp[2] != 0)
836
		confp->memaddr = simple_strtoul(argp[2], NULL, 0);
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	return(1);
}

/*****************************************************************************/

static int stli_open(struct tty_struct *tty, struct file *filp)
{
844 845
	struct stlibrd *brdp;
	struct stliport *portp;
846 847
	unsigned int minordev, brdnr, portnr;
	int rc;
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	minordev = tty->index;
	brdnr = MINOR2BRD(minordev);
	if (brdnr >= stli_nrbrds)
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		return -ENODEV;
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	brdp = stli_brds[brdnr];
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	if (brdp == NULL)
		return -ENODEV;
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	if ((brdp->state & BST_STARTED) == 0)
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		return -ENODEV;
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	portnr = MINOR2PORT(minordev);
859
	if (portnr > brdp->nrports)
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		return -ENODEV;
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	portp = brdp->ports[portnr];
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	if (portp == NULL)
		return -ENODEV;
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	if (portp->devnr < 1)
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		return -ENODEV;
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/*
 *	Check if this port is in the middle of closing. If so then wait
 *	until it is closed then return error status based on flag settings.
 *	The sleep here does not need interrupt protection since the wakeup
 *	for it is done with the same context.
 */
	if (portp->flags & ASYNC_CLOSING) {
		interruptible_sleep_on(&portp->close_wait);
		if (portp->flags & ASYNC_HUP_NOTIFY)
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			return -EAGAIN;
		return -ERESTARTSYS;
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	}

/*
 *	On the first open of the device setup the port hardware, and
 *	initialize the per port data structure. Since initializing the port
 *	requires several commands to the board we will need to wait for any
 *	other open that is already initializing the port.
 */
	portp->tty = tty;
	tty->driver_data = portp;
	portp->refcount++;

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_INITIALIZING, &portp->state));
	if (signal_pending(current))
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		return -ERESTARTSYS;
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	if ((portp->flags & ASYNC_INITIALIZED) == 0) {
		set_bit(ST_INITIALIZING, &portp->state);
		if ((rc = stli_initopen(brdp, portp)) >= 0) {
			portp->flags |= ASYNC_INITIALIZED;
			clear_bit(TTY_IO_ERROR, &tty->flags);
		}
		clear_bit(ST_INITIALIZING, &portp->state);
		wake_up_interruptible(&portp->raw_wait);
		if (rc < 0)
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			return rc;
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	}

/*
 *	Check if this port is in the middle of closing. If so then wait
 *	until it is closed then return error status, based on flag settings.
 *	The sleep here does not need interrupt protection since the wakeup
 *	for it is done with the same context.
 */
	if (portp->flags & ASYNC_CLOSING) {
		interruptible_sleep_on(&portp->close_wait);
		if (portp->flags & ASYNC_HUP_NOTIFY)
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			return -EAGAIN;
		return -ERESTARTSYS;
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	}

/*
 *	Based on type of open being done check if it can overlap with any
 *	previous opens still in effect. If we are a normal serial device
 *	then also we might have to wait for carrier.
 */
	if (!(filp->f_flags & O_NONBLOCK)) {
		if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
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			return rc;
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	}
	portp->flags |= ASYNC_NORMAL_ACTIVE;
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	return 0;
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}

/*****************************************************************************/

static void stli_close(struct tty_struct *tty, struct file *filp)
{
939 940
	struct stlibrd *brdp;
	struct stliport *portp;
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	unsigned long flags;
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	portp = tty->driver_data;
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	if (portp == NULL)
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		return;

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	spin_lock_irqsave(&stli_lock, flags);
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	if (tty_hung_up_p(filp)) {
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		spin_unlock_irqrestore(&stli_lock, flags);
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		return;
	}
	if ((tty->count == 1) && (portp->refcount != 1))
		portp->refcount = 1;
	if (portp->refcount-- > 1) {
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		spin_unlock_irqrestore(&stli_lock, flags);
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		return;
	}

	portp->flags |= ASYNC_CLOSING;

/*
 *	May want to wait for data to drain before closing. The BUSY flag
 *	keeps track of whether we are still transmitting or not. It is
 *	updated by messages from the slave - indicating when all chars
 *	really have drained.
 */
	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	tty->closing = 1;
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	spin_unlock_irqrestore(&stli_lock, flags);

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	if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
		tty_wait_until_sent(tty, portp->closing_wait);

	portp->flags &= ~ASYNC_INITIALIZED;
	brdp = stli_brds[portp->brdnr];
	stli_rawclose(brdp, portp, 0, 0);
	if (tty->termios->c_cflag & HUPCL) {
		stli_mkasysigs(&portp->asig, 0, 0);
		if (test_bit(ST_CMDING, &portp->state))
			set_bit(ST_DOSIGS, &portp->state);
		else
			stli_sendcmd(brdp, portp, A_SETSIGNALS, &portp->asig,
				sizeof(asysigs_t), 0);
	}
	clear_bit(ST_TXBUSY, &portp->state);
	clear_bit(ST_RXSTOP, &portp->state);
	set_bit(TTY_IO_ERROR, &tty->flags);
	if (tty->ldisc.flush_buffer)
		(tty->ldisc.flush_buffer)(tty);
	set_bit(ST_DOFLUSHRX, &portp->state);
	stli_flushbuffer(tty);

	tty->closing = 0;
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	portp->tty = NULL;
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	if (portp->openwaitcnt) {
		if (portp->close_delay)
			msleep_interruptible(jiffies_to_msecs(portp->close_delay));
		wake_up_interruptible(&portp->open_wait);
	}

	portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
	wake_up_interruptible(&portp->close_wait);
}

/*****************************************************************************/

/*
 *	Carry out first open operations on a port. This involves a number of
 *	commands to be sent to the slave. We need to open the port, set the
 *	notification events, set the initial port settings, get and set the
 *	initial signal values. We sleep and wait in between each one. But
 *	this still all happens pretty quickly.
 */

1017
static int stli_initopen(struct stlibrd *brdp, struct stliport *portp)
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{
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	struct tty_struct *tty;
	asynotify_t nt;
	asyport_t aport;
	int rc;
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	if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
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		return rc;
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	memset(&nt, 0, sizeof(asynotify_t));
	nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
	nt.signal = SG_DCD;
	if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt,
	    sizeof(asynotify_t), 0)) < 0)
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		return rc;
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	tty = portp->tty;
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	if (tty == NULL)
		return -ENODEV;
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	stli_mkasyport(portp, &aport, tty->termios);
	if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
	    sizeof(asyport_t), 0)) < 0)
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		return rc;
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	set_bit(ST_GETSIGS, &portp->state);
	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
	    sizeof(asysigs_t), 1)) < 0)
A
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		return rc;
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	if (test_and_clear_bit(ST_GETSIGS, &portp->state))
		portp->sigs = stli_mktiocm(portp->asig.sigvalue);
	stli_mkasysigs(&portp->asig, 1, 1);
	if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
	    sizeof(asysigs_t), 0)) < 0)
A
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		return rc;
L
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1052

A
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1053
	return 0;
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}

/*****************************************************************************/

/*
 *	Send an open message to the slave. This will sleep waiting for the
 *	acknowledgement, so must have user context. We need to co-ordinate
 *	with close events here, since we don't want open and close events
 *	to overlap.
 */

1065
static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
L
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{
A
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1067 1068 1069 1070 1071
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
	int rc;
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1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093

/*
 *	Send a message to the slave to open this port.
 */

/*
 *	Slave is already closing this port. This can happen if a hangup
 *	occurs on this port. So we must wait until it is complete. The
 *	order of opens and closes may not be preserved across shared
 *	memory, so we must wait until it is complete.
 */
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CLOSING, &portp->state));
	if (signal_pending(current)) {
		return -ERESTARTSYS;
	}

/*
 *	Everything is ready now, so write the open message into shared
 *	memory. Once the message is in set the service bits to say that
 *	this port wants service.
 */
A
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	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1095
	EBRDENABLE(brdp);
A
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1096 1097 1098 1099 1100
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	writel(arg, &cp->openarg);
	writeb(1, &cp->open);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
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1101
		portp->portidx;
A
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1102
	writeb(readb(bits) | portp->portbit, bits);
L
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1103 1104 1105
	EBRDDISABLE(brdp);

	if (wait == 0) {
A
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1106 1107
		spin_unlock_irqrestore(&brd_lock, flags);
		return 0;
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1108 1109 1110 1111 1112 1113 1114 1115
	}

/*
 *	Slave is in action, so now we must wait for the open acknowledgment
 *	to come back.
 */
	rc = 0;
	set_bit(ST_OPENING, &portp->state);
A
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	spin_unlock_irqrestore(&brd_lock, flags);

L
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1118 1119 1120 1121 1122 1123 1124
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_OPENING, &portp->state));
	if (signal_pending(current))
		rc = -ERESTARTSYS;

	if ((rc == 0) && (portp->rc != 0))
		rc = -EIO;
A
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	return rc;
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}

/*****************************************************************************/

/*
 *	Send a close message to the slave. Normally this will sleep waiting
 *	for the acknowledgement, but if wait parameter is 0 it will not. If
 *	wait is true then must have user context (to sleep).
 */

1136
static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
L
Linus Torvalds 已提交
1137
{
A
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1138 1139 1140 1141 1142
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
	int rc;
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/*
 *	Slave is already closing this port. This can happen if a hangup
 *	occurs on this port.
 */
	if (wait) {
		wait_event_interruptible(portp->raw_wait,
				!test_bit(ST_CLOSING, &portp->state));
		if (signal_pending(current)) {
			return -ERESTARTSYS;
		}
	}

/*
 *	Write the close command into shared memory.
 */
A
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	spin_lock_irqsave(&brd_lock, flags);
L
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	EBRDENABLE(brdp);
A
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1161 1162 1163 1164 1165
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	writel(arg, &cp->closearg);
	writeb(1, &cp->close);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
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1166
		portp->portidx;
A
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1167
	writeb(readb(bits) |portp->portbit, bits);
L
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1168 1169 1170
	EBRDDISABLE(brdp);

	set_bit(ST_CLOSING, &portp->state);
A
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	spin_unlock_irqrestore(&brd_lock, flags);

	if (wait == 0)
		return 0;
L
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/*
 *	Slave is in action, so now we must wait for the open acknowledgment
 *	to come back.
 */
	rc = 0;
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CLOSING, &portp->state));
	if (signal_pending(current))
		rc = -ERESTARTSYS;

	if ((rc == 0) && (portp->rc != 0))
		rc = -EIO;
A
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	return rc;
L
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}

/*****************************************************************************/

/*
 *	Send a command to the slave and wait for the response. This must
 *	have user context (it sleeps). This routine is generic in that it
 *	can send any type of command. Its purpose is to wait for that command
 *	to complete (as opposed to initiating the command then returning).
 */

1200
static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
L
Linus Torvalds 已提交
1201 1202 1203
{
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
A
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1204
	if (signal_pending(current))
L
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1205 1206 1207 1208 1209 1210
		return -ERESTARTSYS;

	stli_sendcmd(brdp, portp, cmd, arg, size, copyback);

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
A
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	if (signal_pending(current))
L
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1212 1213 1214
		return -ERESTARTSYS;

	if (portp->rc != 0)
A
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1215 1216
		return -EIO;
	return 0;
L
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1217 1218 1219 1220 1221 1222 1223 1224 1225
}

/*****************************************************************************/

/*
 *	Send the termios settings for this port to the slave. This sleeps
 *	waiting for the command to complete - so must have user context.
 */

1226
static int stli_setport(struct stliport *portp)
L
Linus Torvalds 已提交
1227
{
1228
	struct stlibrd *brdp;
A
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1229
	asyport_t aport;
L
Linus Torvalds 已提交
1230

A
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1231 1232 1233 1234
	if (portp == NULL)
		return -ENODEV;
	if (portp->tty == NULL)
		return -ENODEV;
1235
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1236
		return -ENODEV;
L
Linus Torvalds 已提交
1237
	brdp = stli_brds[portp->brdnr];
A
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1238 1239
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251

	stli_mkasyport(portp, &aport, portp->tty->termios);
	return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
}

/*****************************************************************************/

/*
 *	Possibly need to wait for carrier (DCD signal) to come high. Say
 *	maybe because if we are clocal then we don't need to wait...
 */

1252
static int stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp)
L
Linus Torvalds 已提交
1253
{
A
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1254 1255
	unsigned long flags;
	int rc, doclocal;
L
Linus Torvalds 已提交
1256 1257 1258 1259 1260 1261 1262

	rc = 0;
	doclocal = 0;

	if (portp->tty->termios->c_cflag & CLOCAL)
		doclocal++;

A
Alan Cox 已提交
1263
	spin_lock_irqsave(&stli_lock, flags);
L
Linus Torvalds 已提交
1264 1265 1266
	portp->openwaitcnt++;
	if (! tty_hung_up_p(filp))
		portp->refcount--;
A
Alan Cox 已提交
1267
	spin_unlock_irqrestore(&stli_lock, flags);
L
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1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292

	for (;;) {
		stli_mkasysigs(&portp->asig, 1, 1);
		if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
		    &portp->asig, sizeof(asysigs_t), 0)) < 0)
			break;
		if (tty_hung_up_p(filp) ||
		    ((portp->flags & ASYNC_INITIALIZED) == 0)) {
			if (portp->flags & ASYNC_HUP_NOTIFY)
				rc = -EBUSY;
			else
				rc = -ERESTARTSYS;
			break;
		}
		if (((portp->flags & ASYNC_CLOSING) == 0) &&
		    (doclocal || (portp->sigs & TIOCM_CD))) {
			break;
		}
		if (signal_pending(current)) {
			rc = -ERESTARTSYS;
			break;
		}
		interruptible_sleep_on(&portp->open_wait);
	}

A
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1293
	spin_lock_irqsave(&stli_lock, flags);
L
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1294 1295 1296
	if (! tty_hung_up_p(filp))
		portp->refcount++;
	portp->openwaitcnt--;
A
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1297
	spin_unlock_irqrestore(&stli_lock, flags);
L
Linus Torvalds 已提交
1298

A
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1299
	return rc;
L
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}

/*****************************************************************************/

/*
 *	Write routine. Take the data and put it in the shared memory ring
 *	queue. If port is not already sending chars then need to mark the
 *	service bits for this port.
 */

static int stli_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
A
Alan Cox 已提交
1312 1313 1314 1315 1316
	cdkasy_t __iomem *ap;
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	unsigned char __iomem *shbuf;
	unsigned char *chbuf;
1317 1318
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1319 1320
	unsigned int len, stlen, head, tail, size;
	unsigned long flags;
L
Linus Torvalds 已提交
1321 1322 1323 1324

	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
A
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1325 1326
	if (portp == NULL)
		return 0;
1327
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1328
		return 0;
L
Linus Torvalds 已提交
1329
	brdp = stli_brds[portp->brdnr];
A
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1330 1331
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1332 1333 1334 1335 1336
	chbuf = (unsigned char *) buf;

/*
 *	All data is now local, shove as much as possible into shared memory.
 */
A
Alan Cox 已提交
1337
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1338
	EBRDENABLE(brdp);
A
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1339 1340 1341 1342 1343
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
L
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1344 1345 1346 1347 1348 1349 1350 1351 1352
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

1353
	len = min(len, (unsigned int)count);
L
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1354
	count = 0;
A
Alan Cox 已提交
1355
	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset);
L
Linus Torvalds 已提交
1356 1357

	while (len > 0) {
1358
		stlen = min(len, stlen);
A
Alan Cox 已提交
1359
		memcpy_toio(shbuf + head, chbuf, stlen);
L
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1360 1361 1362 1363 1364 1365 1366 1367 1368 1369
		chbuf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

A
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1370 1371
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
L
Linus Torvalds 已提交
1372
	if (test_bit(ST_TXBUSY, &portp->state)) {
A
Alan Cox 已提交
1373 1374
		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
L
Linus Torvalds 已提交
1375
	}
A
Alan Cox 已提交
1376 1377
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
Linus Torvalds 已提交
1378
		portp->portidx;
A
Alan Cox 已提交
1379
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
1380 1381
	set_bit(ST_TXBUSY, &portp->state);
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1382
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399

	return(count);
}

/*****************************************************************************/

/*
 *	Output a single character. We put it into a temporary local buffer
 *	(for speed) then write out that buffer when the flushchars routine
 *	is called. There is a safety catch here so that if some other port
 *	writes chars before the current buffer has been, then we write them
 *	first them do the new ports.
 */

static void stli_putchar(struct tty_struct *tty, unsigned char ch)
{
	if (tty != stli_txcooktty) {
A
Alan Cox 已提交
1400
		if (stli_txcooktty != NULL)
L
Linus Torvalds 已提交
1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
			stli_flushchars(stli_txcooktty);
		stli_txcooktty = tty;
	}

	stli_txcookbuf[stli_txcooksize++] = ch;
}

/*****************************************************************************/

/*
 *	Transfer characters from the local TX cooking buffer to the board.
 *	We sort of ignore the tty that gets passed in here. We rely on the
 *	info stored with the TX cook buffer to tell us which port to flush
 *	the data on. In any case we clean out the TX cook buffer, for re-use
 *	by someone else.
 */

static void stli_flushchars(struct tty_struct *tty)
{
A
Alan Cox 已提交
1420 1421 1422 1423
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	cdkasy_t __iomem *ap;
	struct tty_struct *cooktty;
1424 1425
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1426 1427 1428 1429
	unsigned int len, stlen, head, tail, size, count, cooksize;
	unsigned char *buf;
	unsigned char __iomem *shbuf;
	unsigned long flags;
L
Linus Torvalds 已提交
1430 1431 1432 1433 1434

	cooksize = stli_txcooksize;
	cooktty = stli_txcooktty;
	stli_txcooksize = 0;
	stli_txcookrealsize = 0;
A
Alan Cox 已提交
1435
	stli_txcooktty = NULL;
L
Linus Torvalds 已提交
1436

A
Alan Cox 已提交
1437
	if (tty == NULL)
L
Linus Torvalds 已提交
1438
		return;
A
Alan Cox 已提交
1439
	if (cooktty == NULL)
L
Linus Torvalds 已提交
1440 1441 1442 1443 1444 1445 1446
		return;
	if (tty != cooktty)
		tty = cooktty;
	if (cooksize == 0)
		return;

	portp = tty->driver_data;
A
Alan Cox 已提交
1447
	if (portp == NULL)
L
Linus Torvalds 已提交
1448
		return;
1449
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1450 1451
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1452
	if (brdp == NULL)
L
Linus Torvalds 已提交
1453 1454
		return;

A
Alan Cox 已提交
1455
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1456 1457
	EBRDENABLE(brdp);

A
Alan Cox 已提交
1458 1459 1460 1461 1462
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
L
Linus Torvalds 已提交
1463 1464 1465 1466 1467 1468 1469 1470 1471
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

1472
	len = min(len, cooksize);
L
Linus Torvalds 已提交
1473
	count = 0;
1474
	shbuf = EBRDGETMEMPTR(brdp, portp->txoffset);
L
Linus Torvalds 已提交
1475 1476 1477
	buf = stli_txcookbuf;

	while (len > 0) {
1478
		stlen = min(len, stlen);
A
Alan Cox 已提交
1479
		memcpy_toio(shbuf + head, buf, stlen);
L
Linus Torvalds 已提交
1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
		buf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

A
Alan Cox 已提交
1490 1491
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
L
Linus Torvalds 已提交
1492 1493

	if (test_bit(ST_TXBUSY, &portp->state)) {
A
Alan Cox 已提交
1494 1495
		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
L
Linus Torvalds 已提交
1496
	}
A
Alan Cox 已提交
1497 1498
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
Linus Torvalds 已提交
1499
		portp->portidx;
A
Alan Cox 已提交
1500
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
1501 1502 1503
	set_bit(ST_TXBUSY, &portp->state);

	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1504
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1505 1506 1507 1508 1509 1510
}

/*****************************************************************************/

static int stli_writeroom(struct tty_struct *tty)
{
A
Alan Cox 已提交
1511
	cdkasyrq_t __iomem *rp;
1512 1513
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1514 1515
	unsigned int head, tail, len;
	unsigned long flags;
L
Linus Torvalds 已提交
1516 1517 1518 1519

	if (tty == stli_txcooktty) {
		if (stli_txcookrealsize != 0) {
			len = stli_txcookrealsize - stli_txcooksize;
A
Alan Cox 已提交
1520
			return len;
L
Linus Torvalds 已提交
1521 1522 1523 1524
		}
	}

	portp = tty->driver_data;
A
Alan Cox 已提交
1525 1526
	if (portp == NULL)
		return 0;
1527
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1528
		return 0;
L
Linus Torvalds 已提交
1529
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1530 1531
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1532

A
Alan Cox 已提交
1533
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1534
	EBRDENABLE(brdp);
A
Alan Cox 已提交
1535 1536 1537 1538 1539
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
L
Linus Torvalds 已提交
1540 1541 1542
	len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
	len--;
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1543
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1544 1545 1546 1547 1548

	if (tty == stli_txcooktty) {
		stli_txcookrealsize = len;
		len -= stli_txcooksize;
	}
A
Alan Cox 已提交
1549
	return len;
L
Linus Torvalds 已提交
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563
}

/*****************************************************************************/

/*
 *	Return the number of characters in the transmit buffer. Normally we
 *	will return the number of chars in the shared memory ring queue.
 *	We need to kludge around the case where the shared memory buffer is
 *	empty but not all characters have drained yet, for this case just
 *	return that there is 1 character in the buffer!
 */

static int stli_charsinbuffer(struct tty_struct *tty)
{
A
Alan Cox 已提交
1564
	cdkasyrq_t __iomem *rp;
1565 1566
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1567 1568
	unsigned int head, tail, len;
	unsigned long flags;
L
Linus Torvalds 已提交
1569 1570 1571 1572

	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
A
Alan Cox 已提交
1573 1574
	if (portp == NULL)
		return 0;
1575
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1576
		return 0;
L
Linus Torvalds 已提交
1577
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1578 1579
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1580

A
Alan Cox 已提交
1581
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1582
	EBRDENABLE(brdp);
A
Alan Cox 已提交
1583 1584 1585 1586 1587
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
L
Linus Torvalds 已提交
1588 1589 1590 1591
	len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
	if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
		len = 1;
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1592
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1593

A
Alan Cox 已提交
1594
	return len;
L
Linus Torvalds 已提交
1595 1596 1597 1598 1599 1600 1601 1602
}

/*****************************************************************************/

/*
 *	Generate the serial struct info.
 */

1603
static int stli_getserial(struct stliport *portp, struct serial_struct __user *sp)
L
Linus Torvalds 已提交
1604
{
A
Alan Cox 已提交
1605
	struct serial_struct sio;
1606
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620

	memset(&sio, 0, sizeof(struct serial_struct));
	sio.type = PORT_UNKNOWN;
	sio.line = portp->portnr;
	sio.irq = 0;
	sio.flags = portp->flags;
	sio.baud_base = portp->baud_base;
	sio.close_delay = portp->close_delay;
	sio.closing_wait = portp->closing_wait;
	sio.custom_divisor = portp->custom_divisor;
	sio.xmit_fifo_size = 0;
	sio.hub6 = 0;

	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1621
	if (brdp != NULL)
L
Linus Torvalds 已提交
1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635
		sio.port = brdp->iobase;
		
	return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ?
			-EFAULT : 0;
}

/*****************************************************************************/

/*
 *	Set port according to the serial struct info.
 *	At this point we do not do any auto-configure stuff, so we will
 *	just quietly ignore any requests to change irq, etc.
 */

1636
static int stli_setserial(struct stliport *portp, struct serial_struct __user *sp)
L
Linus Torvalds 已提交
1637
{
A
Alan Cox 已提交
1638 1639
	struct serial_struct sio;
	int rc;
L
Linus Torvalds 已提交
1640 1641 1642 1643 1644 1645 1646 1647

	if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
		return -EFAULT;
	if (!capable(CAP_SYS_ADMIN)) {
		if ((sio.baud_base != portp->baud_base) ||
		    (sio.close_delay != portp->close_delay) ||
		    ((sio.flags & ~ASYNC_USR_MASK) !=
		    (portp->flags & ~ASYNC_USR_MASK)))
A
Alan Cox 已提交
1648
			return -EPERM;
L
Linus Torvalds 已提交
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658
	} 

	portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
		(sio.flags & ASYNC_USR_MASK);
	portp->baud_base = sio.baud_base;
	portp->close_delay = sio.close_delay;
	portp->closing_wait = sio.closing_wait;
	portp->custom_divisor = sio.custom_divisor;

	if ((rc = stli_setport(portp)) < 0)
A
Alan Cox 已提交
1659 1660
		return rc;
	return 0;
L
Linus Torvalds 已提交
1661 1662 1663 1664 1665 1666
}

/*****************************************************************************/

static int stli_tiocmget(struct tty_struct *tty, struct file *file)
{
1667 1668
	struct stliport *portp = tty->driver_data;
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1669 1670
	int rc;

A
Alan Cox 已提交
1671 1672
	if (portp == NULL)
		return -ENODEV;
1673
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1674
		return 0;
L
Linus Torvalds 已提交
1675
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1676 1677
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1678
	if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1679
		return -EIO;
L
Linus Torvalds 已提交
1680 1681 1682

	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
			       &portp->asig, sizeof(asysigs_t), 1)) < 0)
A
Alan Cox 已提交
1683
		return rc;
L
Linus Torvalds 已提交
1684 1685 1686 1687 1688 1689 1690

	return stli_mktiocm(portp->asig.sigvalue);
}

static int stli_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear)
{
1691 1692
	struct stliport *portp = tty->driver_data;
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1693 1694
	int rts = -1, dtr = -1;

A
Alan Cox 已提交
1695 1696
	if (portp == NULL)
		return -ENODEV;
1697
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1698
		return 0;
L
Linus Torvalds 已提交
1699
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1700 1701
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1702
	if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1703
		return -EIO;
L
Linus Torvalds 已提交
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721

	if (set & TIOCM_RTS)
		rts = 1;
	if (set & TIOCM_DTR)
		dtr = 1;
	if (clear & TIOCM_RTS)
		rts = 0;
	if (clear & TIOCM_DTR)
		dtr = 0;

	stli_mkasysigs(&portp->asig, dtr, rts);

	return stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
			    sizeof(asysigs_t), 0);
}

static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
1722 1723
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1724 1725
	unsigned int ival;
	int rc;
L
Linus Torvalds 已提交
1726 1727 1728
	void __user *argp = (void __user *)arg;

	portp = tty->driver_data;
A
Alan Cox 已提交
1729 1730
	if (portp == NULL)
		return -ENODEV;
1731
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1732
		return 0;
L
Linus Torvalds 已提交
1733
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1734 1735
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1736 1737 1738 1739

	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
 	    (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
		if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1740
			return -EIO;
L
Linus Torvalds 已提交
1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
	}

	rc = 0;

	switch (cmd) {
	case TIOCGSOFTCAR:
		rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
			(unsigned __user *) arg);
		break;
	case TIOCSSOFTCAR:
		if ((rc = get_user(ival, (unsigned __user *) arg)) == 0)
			tty->termios->c_cflag =
				(tty->termios->c_cflag & ~CLOCAL) |
				(ival ? CLOCAL : 0);
		break;
	case TIOCGSERIAL:
		rc = stli_getserial(portp, argp);
		break;
	case TIOCSSERIAL:
		rc = stli_setserial(portp, argp);
		break;
	case STL_GETPFLAG:
		rc = put_user(portp->pflag, (unsigned __user *)argp);
		break;
	case STL_SETPFLAG:
		if ((rc = get_user(portp->pflag, (unsigned __user *)argp)) == 0)
			stli_setport(portp);
		break;
	case COM_GETPORTSTATS:
		rc = stli_getportstats(portp, argp);
		break;
	case COM_CLRPORTSTATS:
		rc = stli_clrportstats(portp, argp);
		break;
	case TIOCSERCONFIG:
	case TIOCSERGWILD:
	case TIOCSERSWILD:
	case TIOCSERGETLSR:
	case TIOCSERGSTRUCT:
	case TIOCSERGETMULTI:
	case TIOCSERSETMULTI:
	default:
		rc = -ENOIOCTLCMD;
		break;
	}

A
Alan Cox 已提交
1787
	return rc;
L
Linus Torvalds 已提交
1788 1789 1790 1791 1792 1793 1794 1795 1796
}

/*****************************************************************************/

/*
 *	This routine assumes that we have user context and can sleep.
 *	Looks like it is true for the current ttys implementation..!!
 */

A
Alan Cox 已提交
1797
static void stli_settermios(struct tty_struct *tty, struct ktermios *old)
L
Linus Torvalds 已提交
1798
{
1799 1800
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1801
	struct ktermios *tiosp;
A
Alan Cox 已提交
1802
	asyport_t aport;
L
Linus Torvalds 已提交
1803

A
Alan Cox 已提交
1804
	if (tty == NULL)
L
Linus Torvalds 已提交
1805 1806
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
1807
	if (portp == NULL)
L
Linus Torvalds 已提交
1808
		return;
1809
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1810 1811
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1812
	if (brdp == NULL)
L
Linus Torvalds 已提交
1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
		return;

	tiosp = tty->termios;
	if ((tiosp->c_cflag == old->c_cflag) &&
	    (tiosp->c_iflag == old->c_iflag))
		return;

	stli_mkasyport(portp, &aport, tiosp);
	stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
	stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
	stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
		sizeof(asysigs_t), 0);
	if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
		tty->hw_stopped = 0;
	if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
		wake_up_interruptible(&portp->open_wait);
}

/*****************************************************************************/

/*
 *	Attempt to flow control who ever is sending us data. We won't really
 *	do any flow control action here. We can't directly, and even if we
 *	wanted to we would have to send a command to the slave. The slave
 *	knows how to flow control, and will do so when its buffers reach its
 *	internal high water marks. So what we will do is set a local state
 *	bit that will stop us sending any RX data up from the poll routine
 *	(which is the place where RX data from the slave is handled).
 */

static void stli_throttle(struct tty_struct *tty)
{
1845
	struct stliport	*portp = tty->driver_data;
A
Alan Cox 已提交
1846
	if (portp == NULL)
L
Linus Torvalds 已提交
1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860
		return;
	set_bit(ST_RXSTOP, &portp->state);
}

/*****************************************************************************/

/*
 *	Unflow control the device sending us data... That means that all
 *	we have to do is clear the RXSTOP state bit. The next poll call
 *	will then be able to pass the RX data back up.
 */

static void stli_unthrottle(struct tty_struct *tty)
{
1861
	struct stliport	*portp = tty->driver_data;
A
Alan Cox 已提交
1862
	if (portp == NULL)
L
Linus Torvalds 已提交
1863 1864 1865 1866 1867 1868 1869
		return;
	clear_bit(ST_RXSTOP, &portp->state);
}

/*****************************************************************************/

/*
A
Alan Cox 已提交
1870
 *	Stop the transmitter.
L
Linus Torvalds 已提交
1871 1872 1873 1874 1875 1876 1877 1878 1879
 */

static void stli_stop(struct tty_struct *tty)
{
}

/*****************************************************************************/

/*
A
Alan Cox 已提交
1880
 *	Start the transmitter again.
L
Linus Torvalds 已提交
1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897
 */

static void stli_start(struct tty_struct *tty)
{
}

/*****************************************************************************/

/*
 *	Scheduler called hang up routine. This is called from the scheduler,
 *	not direct from the driver "poll" routine. We can't call it there
 *	since the real local hangup code will enable/disable the board and
 *	other things that we can't do while handling the poll. Much easier
 *	to deal with it some time later (don't really care when, hangups
 *	aren't that time critical).
 */

1898
static void stli_dohangup(struct work_struct *ugly_api)
L
Linus Torvalds 已提交
1899
{
1900
	struct stliport *portp = container_of(ugly_api, struct stliport, tqhangup);
A
Alan Cox 已提交
1901 1902
	if (portp->tty != NULL) {
		tty_hangup(portp->tty);
L
Linus Torvalds 已提交
1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916
	}
}

/*****************************************************************************/

/*
 *	Hangup this port. This is pretty much like closing the port, only
 *	a little more brutal. No waiting for data to drain. Shutdown the
 *	port and maybe drop signals. This is rather tricky really. We want
 *	to close the port as well.
 */

static void stli_hangup(struct tty_struct *tty)
{
1917 1918
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1919
	unsigned long flags;
L
Linus Torvalds 已提交
1920 1921

	portp = tty->driver_data;
A
Alan Cox 已提交
1922
	if (portp == NULL)
L
Linus Torvalds 已提交
1923
		return;
1924
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1925 1926
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1927
	if (brdp == NULL)
L
Linus Torvalds 已提交
1928 1929 1930 1931
		return;

	portp->flags &= ~ASYNC_INITIALIZED;

A
Alan Cox 已提交
1932
	if (!test_bit(ST_CLOSING, &portp->state))
L
Linus Torvalds 已提交
1933
		stli_rawclose(brdp, portp, 0, 0);
A
Alan Cox 已提交
1934 1935

	spin_lock_irqsave(&stli_lock, flags);
L
Linus Torvalds 已提交
1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950
	if (tty->termios->c_cflag & HUPCL) {
		stli_mkasysigs(&portp->asig, 0, 0);
		if (test_bit(ST_CMDING, &portp->state)) {
			set_bit(ST_DOSIGS, &portp->state);
			set_bit(ST_DOFLUSHTX, &portp->state);
			set_bit(ST_DOFLUSHRX, &portp->state);
		} else {
			stli_sendcmd(brdp, portp, A_SETSIGNALSF,
				&portp->asig, sizeof(asysigs_t), 0);
		}
	}

	clear_bit(ST_TXBUSY, &portp->state);
	clear_bit(ST_RXSTOP, &portp->state);
	set_bit(TTY_IO_ERROR, &tty->flags);
A
Alan Cox 已提交
1951
	portp->tty = NULL;
L
Linus Torvalds 已提交
1952 1953
	portp->flags &= ~ASYNC_NORMAL_ACTIVE;
	portp->refcount = 0;
A
Alan Cox 已提交
1954 1955
	spin_unlock_irqrestore(&stli_lock, flags);

L
Linus Torvalds 已提交
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969
	wake_up_interruptible(&portp->open_wait);
}

/*****************************************************************************/

/*
 *	Flush characters from the lower buffer. We may not have user context
 *	so we cannot sleep waiting for it to complete. Also we need to check
 *	if there is chars for this port in the TX cook buffer, and flush them
 *	as well.
 */

static void stli_flushbuffer(struct tty_struct *tty)
{
1970 1971
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1972
	unsigned long ftype, flags;
L
Linus Torvalds 已提交
1973 1974

	portp = tty->driver_data;
A
Alan Cox 已提交
1975
	if (portp == NULL)
L
Linus Torvalds 已提交
1976
		return;
1977
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1978 1979
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1980
	if (brdp == NULL)
L
Linus Torvalds 已提交
1981 1982
		return;

A
Alan Cox 已提交
1983
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1984
	if (tty == stli_txcooktty) {
A
Alan Cox 已提交
1985
		stli_txcooktty = NULL;
L
Linus Torvalds 已提交
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996
		stli_txcooksize = 0;
		stli_txcookrealsize = 0;
	}
	if (test_bit(ST_CMDING, &portp->state)) {
		set_bit(ST_DOFLUSHTX, &portp->state);
	} else {
		ftype = FLUSHTX;
		if (test_bit(ST_DOFLUSHRX, &portp->state)) {
			ftype |= FLUSHRX;
			clear_bit(ST_DOFLUSHRX, &portp->state);
		}
A
Alan Cox 已提交
1997
		__stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(u32), 0);
L
Linus Torvalds 已提交
1998
	}
A
Alan Cox 已提交
1999 2000
	spin_unlock_irqrestore(&brd_lock, flags);
	tty_wakeup(tty);
L
Linus Torvalds 已提交
2001 2002 2003 2004 2005 2006
}

/*****************************************************************************/

static void stli_breakctl(struct tty_struct *tty, int state)
{
2007 2008
	struct stlibrd	*brdp;
	struct stliport	*portp;
L
Linus Torvalds 已提交
2009 2010 2011
	long		arg;

	portp = tty->driver_data;
A
Alan Cox 已提交
2012
	if (portp == NULL)
L
Linus Torvalds 已提交
2013
		return;
2014
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2015 2016
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2017
	if (brdp == NULL)
L
Linus Torvalds 已提交
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027
		return;

	arg = (state == -1) ? BREAKON : BREAKOFF;
	stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0);
}

/*****************************************************************************/

static void stli_waituntilsent(struct tty_struct *tty, int timeout)
{
2028
	struct stliport *portp;
A
Alan Cox 已提交
2029
	unsigned long tend;
L
Linus Torvalds 已提交
2030

A
Alan Cox 已提交
2031
	if (tty == NULL)
L
Linus Torvalds 已提交
2032 2033
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
2034
	if (portp == NULL)
L
Linus Torvalds 已提交
2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053
		return;

	if (timeout == 0)
		timeout = HZ;
	tend = jiffies + timeout;

	while (test_bit(ST_TXBUSY, &portp->state)) {
		if (signal_pending(current))
			break;
		msleep_interruptible(20);
		if (time_after_eq(jiffies, tend))
			break;
	}
}

/*****************************************************************************/

static void stli_sendxchar(struct tty_struct *tty, char ch)
{
2054 2055
	struct stlibrd	*brdp;
	struct stliport	*portp;
L
Linus Torvalds 已提交
2056 2057 2058
	asyctrl_t	actrl;

	portp = tty->driver_data;
A
Alan Cox 已提交
2059
	if (portp == NULL)
L
Linus Torvalds 已提交
2060
		return;
2061
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2062 2063
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2064
	if (brdp == NULL)
L
Linus Torvalds 已提交
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088
		return;

	memset(&actrl, 0, sizeof(asyctrl_t));
	if (ch == STOP_CHAR(tty)) {
		actrl.rxctrl = CT_STOPFLOW;
	} else if (ch == START_CHAR(tty)) {
		actrl.rxctrl = CT_STARTFLOW;
	} else {
		actrl.txctrl = CT_SENDCHR;
		actrl.tximdch = ch;
	}
	stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
}

/*****************************************************************************/

#define	MAXLINE		80

/*
 *	Format info for a specified port. The line is deliberately limited
 *	to 80 characters. (If it is too long it will be truncated, if too
 *	short then padded with spaces).
 */

2089
static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos)
L
Linus Torvalds 已提交
2090
{
A
Alan Cox 已提交
2091 2092
	char *sp, *uart;
	int rc, cnt;
L
Linus Torvalds 已提交
2093 2094 2095 2096 2097 2098

	rc = stli_portcmdstats(portp);

	uart = "UNKNOWN";
	if (brdp->state & BST_STARTED) {
		switch (stli_comstats.hwid) {
A
Alan Cox 已提交
2099 2100 2101
		case 0:	uart = "2681"; break;
		case 1:	uart = "SC26198"; break;
		default:uart = "CD1400"; break;
L
Linus Torvalds 已提交
2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151
		}
	}

	sp = pos;
	sp += sprintf(sp, "%d: uart:%s ", portnr, uart);

	if ((brdp->state & BST_STARTED) && (rc >= 0)) {
		sp += sprintf(sp, "tx:%d rx:%d", (int) stli_comstats.txtotal,
			(int) stli_comstats.rxtotal);

		if (stli_comstats.rxframing)
			sp += sprintf(sp, " fe:%d",
				(int) stli_comstats.rxframing);
		if (stli_comstats.rxparity)
			sp += sprintf(sp, " pe:%d",
				(int) stli_comstats.rxparity);
		if (stli_comstats.rxbreaks)
			sp += sprintf(sp, " brk:%d",
				(int) stli_comstats.rxbreaks);
		if (stli_comstats.rxoverrun)
			sp += sprintf(sp, " oe:%d",
				(int) stli_comstats.rxoverrun);

		cnt = sprintf(sp, "%s%s%s%s%s ",
			(stli_comstats.signals & TIOCM_RTS) ? "|RTS" : "",
			(stli_comstats.signals & TIOCM_CTS) ? "|CTS" : "",
			(stli_comstats.signals & TIOCM_DTR) ? "|DTR" : "",
			(stli_comstats.signals & TIOCM_CD) ? "|DCD" : "",
			(stli_comstats.signals & TIOCM_DSR) ? "|DSR" : "");
		*sp = ' ';
		sp += cnt;
	}

	for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
		*sp++ = ' ';
	if (cnt >= MAXLINE)
		pos[(MAXLINE - 2)] = '+';
	pos[(MAXLINE - 1)] = '\n';

	return(MAXLINE);
}

/*****************************************************************************/

/*
 *	Port info, read from the /proc file system.
 */

static int stli_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
{
2152 2153
	struct stlibrd *brdp;
	struct stliport *portp;
2154
	unsigned int brdnr, portnr, totalport;
A
Alan Cox 已提交
2155 2156
	int curoff, maxoff;
	char *pos;
L
Linus Torvalds 已提交
2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176

	pos = page;
	totalport = 0;
	curoff = 0;

	if (off == 0) {
		pos += sprintf(pos, "%s: version %s", stli_drvtitle,
			stli_drvversion);
		while (pos < (page + MAXLINE - 1))
			*pos++ = ' ';
		*pos++ = '\n';
	}
	curoff =  MAXLINE;

/*
 *	We scan through for each board, panel and port. The offset is
 *	calculated on the fly, and irrelevant ports are skipped.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
A
Alan Cox 已提交
2177
		if (brdp == NULL)
L
Linus Torvalds 已提交
2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191
			continue;
		if (brdp->state == 0)
			continue;

		maxoff = curoff + (brdp->nrports * MAXLINE);
		if (off >= maxoff) {
			curoff = maxoff;
			continue;
		}

		totalport = brdnr * STL_MAXPORTS;
		for (portnr = 0; (portnr < brdp->nrports); portnr++,
		    totalport++) {
			portp = brdp->ports[portnr];
A
Alan Cox 已提交
2192
			if (portp == NULL)
L
Linus Torvalds 已提交
2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218
				continue;
			if (off >= (curoff += MAXLINE))
				continue;
			if ((pos - page + MAXLINE) > count)
				goto stli_readdone;
			pos += stli_portinfo(brdp, portp, totalport, pos);
		}
	}

	*eof = 1;

stli_readdone:
	*start = page;
	return(pos - page);
}

/*****************************************************************************/

/*
 *	Generic send command routine. This will send a message to the slave,
 *	of the specified type with the specified argument. Must be very
 *	careful of data that will be copied out from shared memory -
 *	containing command results. The command completion is all done from
 *	a poll routine that does not have user context. Therefore you cannot
 *	copy back directly into user space, or to the kernel stack of a
 *	process. This routine does not sleep, so can be called from anywhere.
A
Alan Cox 已提交
2219 2220 2221
 *
 *	The caller must hold the brd_lock (see also stli_sendcmd the usual
 *	entry point)
L
Linus Torvalds 已提交
2222 2223
 */

2224
static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
L
Linus Torvalds 已提交
2225
{
A
Alan Cox 已提交
2226 2227 2228 2229
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
L
Linus Torvalds 已提交
2230

A
Alan Cox 已提交
2231
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
2232 2233 2234 2235

	if (test_bit(ST_CMDING, &portp->state)) {
		printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n",
				(int) cmd);
A
Alan Cox 已提交
2236
		spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
2237 2238 2239 2240
		return;
	}

	EBRDENABLE(brdp);
A
Alan Cox 已提交
2241
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
L
Linus Torvalds 已提交
2242
	if (size > 0) {
A
Alan Cox 已提交
2243
		memcpy_toio((void __iomem *) &(cp->args[0]), arg, size);
L
Linus Torvalds 已提交
2244 2245 2246 2247 2248
		if (copyback) {
			portp->argp = arg;
			portp->argsize = size;
		}
	}
A
Alan Cox 已提交
2249 2250 2251 2252
	writel(0, &cp->status);
	writel(cmd, &cp->cmd);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
Linus Torvalds 已提交
2253
		portp->portidx;
A
Alan Cox 已提交
2254
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
2255 2256
	set_bit(ST_CMDING, &portp->state);
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
2257 2258 2259
	spin_unlock_irqrestore(&brd_lock, flags);
}

2260
static void stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
A
Alan Cox 已提交
2261 2262 2263 2264 2265 2266
{
	unsigned long		flags;

	spin_lock_irqsave(&brd_lock, flags);
	__stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278
}

/*****************************************************************************/

/*
 *	Read data from shared memory. This assumes that the shared memory
 *	is enabled and that interrupts are off. Basically we just empty out
 *	the shared memory buffer into the tty buffer. Must be careful to
 *	handle the case where we fill up the tty buffer, but still have
 *	more chars to unload.
 */

2279
static void stli_read(struct stlibrd *brdp, struct stliport *portp)
L
Linus Torvalds 已提交
2280
{
A
Alan Cox 已提交
2281 2282
	cdkasyrq_t __iomem *rp;
	char __iomem *shbuf;
L
Linus Torvalds 已提交
2283
	struct tty_struct	*tty;
A
Alan Cox 已提交
2284 2285
	unsigned int head, tail, size;
	unsigned int len, stlen;
L
Linus Torvalds 已提交
2286 2287 2288 2289

	if (test_bit(ST_RXSTOP, &portp->state))
		return;
	tty = portp->tty;
A
Alan Cox 已提交
2290
	if (tty == NULL)
L
Linus Torvalds 已提交
2291 2292
		return;

A
Alan Cox 已提交
2293 2294 2295 2296 2297
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	head = (unsigned int) readw(&rp->head);
	if (head != ((unsigned int) readw(&rp->head)))
		head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
L
Linus Torvalds 已提交
2298 2299 2300 2301 2302 2303 2304 2305 2306
	size = portp->rxsize;
	if (head >= tail) {
		len = head - tail;
		stlen = len;
	} else {
		len = size - (tail - head);
		stlen = size - tail;
	}

A
Alan Cox 已提交
2307
	len = tty_buffer_request_room(tty, len);
A
Alan Cox 已提交
2308 2309

	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset);
L
Linus Torvalds 已提交
2310 2311

	while (len > 0) {
A
Alan Cox 已提交
2312 2313
		unsigned char *cptr;

2314
		stlen = min(len, stlen);
A
Alan Cox 已提交
2315 2316
		tty_prepare_flip_string(tty, &cptr, stlen);
		memcpy_fromio(cptr, shbuf + tail, stlen);
L
Linus Torvalds 已提交
2317 2318 2319 2320 2321 2322 2323
		len -= stlen;
		tail += stlen;
		if (tail >= size) {
			tail = 0;
			stlen = head;
		}
	}
A
Alan Cox 已提交
2324 2325
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	writew(tail, &rp->tail);
L
Linus Torvalds 已提交
2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340

	if (head != tail)
		set_bit(ST_RXING, &portp->state);

	tty_schedule_flip(tty);
}

/*****************************************************************************/

/*
 *	Set up and carry out any delayed commands. There is only a small set
 *	of slave commands that can be done "off-level". So it is not too
 *	difficult to deal with them here.
 */

2341
static void stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp)
L
Linus Torvalds 已提交
2342
{
A
Alan Cox 已提交
2343
	int cmd;
L
Linus Torvalds 已提交
2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357

	if (test_bit(ST_DOSIGS, &portp->state)) {
		if (test_bit(ST_DOFLUSHTX, &portp->state) &&
		    test_bit(ST_DOFLUSHRX, &portp->state))
			cmd = A_SETSIGNALSF;
		else if (test_bit(ST_DOFLUSHTX, &portp->state))
			cmd = A_SETSIGNALSFTX;
		else if (test_bit(ST_DOFLUSHRX, &portp->state))
			cmd = A_SETSIGNALSFRX;
		else
			cmd = A_SETSIGNALS;
		clear_bit(ST_DOFLUSHTX, &portp->state);
		clear_bit(ST_DOFLUSHRX, &portp->state);
		clear_bit(ST_DOSIGS, &portp->state);
A
Alan Cox 已提交
2358
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig,
L
Linus Torvalds 已提交
2359
			sizeof(asysigs_t));
A
Alan Cox 已提交
2360 2361
		writel(0, &cp->status);
		writel(cmd, &cp->cmd);
L
Linus Torvalds 已提交
2362 2363 2364 2365 2366 2367 2368
		set_bit(ST_CMDING, &portp->state);
	} else if (test_bit(ST_DOFLUSHTX, &portp->state) ||
	    test_bit(ST_DOFLUSHRX, &portp->state)) {
		cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
		cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
		clear_bit(ST_DOFLUSHTX, &portp->state);
		clear_bit(ST_DOFLUSHRX, &portp->state);
A
Alan Cox 已提交
2369 2370 2371
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &cmd, sizeof(int));
		writel(0, &cp->status);
		writel(A_FLUSH, &cp->cmd);
L
Linus Torvalds 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388
		set_bit(ST_CMDING, &portp->state);
	}
}

/*****************************************************************************/

/*
 *	Host command service checking. This handles commands or messages
 *	coming from the slave to the host. Must have board shared memory
 *	enabled and interrupts off when called. Notice that by servicing the
 *	read data last we don't need to change the shared memory pointer
 *	during processing (which is a slow IO operation).
 *	Return value indicates if this port is still awaiting actions from
 *	the slave (like open, command, or even TX data being sent). If 0
 *	then port is still busy, otherwise no longer busy.
 */

2389
static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp)
L
Linus Torvalds 已提交
2390
{
A
Alan Cox 已提交
2391 2392 2393 2394 2395 2396 2397 2398
	cdkasy_t __iomem *ap;
	cdkctrl_t __iomem *cp;
	struct tty_struct *tty;
	asynotify_t nt;
	unsigned long oldsigs;
	int rc, donerx;

	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
L
Linus Torvalds 已提交
2399 2400 2401 2402 2403 2404
	cp = &ap->ctrl;

/*
 *	Check if we are waiting for an open completion message.
 */
	if (test_bit(ST_OPENING, &portp->state)) {
A
Alan Cox 已提交
2405 2406
		rc = readl(&cp->openarg);
		if (readb(&cp->open) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2407 2408
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2409
			writel(0, &cp->openarg);
L
Linus Torvalds 已提交
2410 2411 2412 2413 2414 2415 2416 2417 2418 2419
			portp->rc = rc;
			clear_bit(ST_OPENING, &portp->state);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check if we are waiting for a close completion message.
 */
	if (test_bit(ST_CLOSING, &portp->state)) {
A
Alan Cox 已提交
2420 2421
		rc = (int) readl(&cp->closearg);
		if (readb(&cp->close) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2422 2423
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2424
			writel(0, &cp->closearg);
L
Linus Torvalds 已提交
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435
			portp->rc = rc;
			clear_bit(ST_CLOSING, &portp->state);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check if we are waiting for a command completion message. We may
 *	need to copy out the command results associated with this command.
 */
	if (test_bit(ST_CMDING, &portp->state)) {
A
Alan Cox 已提交
2436 2437
		rc = readl(&cp->status);
		if (readl(&cp->cmd) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2438 2439
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2440 2441
			if (portp->argp != NULL) {
				memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]),
L
Linus Torvalds 已提交
2442
					portp->argsize);
A
Alan Cox 已提交
2443
				portp->argp = NULL;
L
Linus Torvalds 已提交
2444
			}
A
Alan Cox 已提交
2445
			writel(0, &cp->status);
L
Linus Torvalds 已提交
2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483
			portp->rc = rc;
			clear_bit(ST_CMDING, &portp->state);
			stli_dodelaycmd(portp, cp);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

/*
 *	Check for any notification messages ready. This includes lots of
 *	different types of events - RX chars ready, RX break received,
 *	TX data low or empty in the slave, modem signals changed state.
 */
	donerx = 0;

	if (ap->notify) {
		nt = ap->changed;
		ap->notify = 0;
		tty = portp->tty;

		if (nt.signal & SG_DCD) {
			oldsigs = portp->sigs;
			portp->sigs = stli_mktiocm(nt.sigvalue);
			clear_bit(ST_GETSIGS, &portp->state);
			if ((portp->sigs & TIOCM_CD) &&
			    ((oldsigs & TIOCM_CD) == 0))
				wake_up_interruptible(&portp->open_wait);
			if ((oldsigs & TIOCM_CD) &&
			    ((portp->sigs & TIOCM_CD) == 0)) {
				if (portp->flags & ASYNC_CHECK_CD) {
					if (tty)
						schedule_work(&portp->tqhangup);
				}
			}
		}

		if (nt.data & DT_TXEMPTY)
			clear_bit(ST_TXBUSY, &portp->state);
		if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
A
Alan Cox 已提交
2484 2485 2486
			if (tty != NULL) {
				tty_wakeup(tty);
				EBRDENABLE(brdp);
L
Linus Torvalds 已提交
2487 2488 2489 2490 2491
				wake_up_interruptible(&tty->write_wait);
			}
		}

		if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
A
Alan Cox 已提交
2492
			if (tty != NULL) {
A
Alan Cox 已提交
2493 2494 2495 2496
				tty_insert_flip_char(tty, 0, TTY_BREAK);
				if (portp->flags & ASYNC_SAK) {
					do_SAK(tty);
					EBRDENABLE(brdp);
L
Linus Torvalds 已提交
2497
				}
A
Alan Cox 已提交
2498
				tty_schedule_flip(tty);
L
Linus Torvalds 已提交
2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535
			}
		}

		if (nt.data & DT_RXBUSY) {
			donerx++;
			stli_read(brdp, portp);
		}
	}

/*
 *	It might seem odd that we are checking for more RX chars here.
 *	But, we need to handle the case where the tty buffer was previously
 *	filled, but we had more characters to pass up. The slave will not
 *	send any more RX notify messages until the RX buffer has been emptied.
 *	But it will leave the service bits on (since the buffer is not empty).
 *	So from here we can try to process more RX chars.
 */
	if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
		clear_bit(ST_RXING, &portp->state);
		stli_read(brdp, portp);
	}

	return((test_bit(ST_OPENING, &portp->state) ||
		test_bit(ST_CLOSING, &portp->state) ||
		test_bit(ST_CMDING, &portp->state) ||
		test_bit(ST_TXBUSY, &portp->state) ||
		test_bit(ST_RXING, &portp->state)) ? 0 : 1);
}

/*****************************************************************************/

/*
 *	Service all ports on a particular board. Assumes that the boards
 *	shared memory is enabled, and that the page pointer is pointed
 *	at the cdk header structure.
 */

2536
static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp)
L
Linus Torvalds 已提交
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{
2538
	struct stliport *portp;
A
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	unsigned char hostbits[(STL_MAXCHANS / 8) + 1];
	unsigned char slavebits[(STL_MAXCHANS / 8) + 1];
	unsigned char __iomem *slavep;
	int bitpos, bitat, bitsize;
	int channr, nrdevs, slavebitchange;
L
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	bitsize = brdp->bitsize;
	nrdevs = brdp->nrdevs;

/*
 *	Check if slave wants any service. Basically we try to do as
 *	little work as possible here. There are 2 levels of service
 *	bits. So if there is nothing to do we bail early. We check
 *	8 service bits at a time in the inner loop, so we can bypass
 *	the lot if none of them want service.
 */
A
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	memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset),
L
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		bitsize);

	memset(&slavebits[0], 0, bitsize);
	slavebitchange = 0;

	for (bitpos = 0; (bitpos < bitsize); bitpos++) {
		if (hostbits[bitpos] == 0)
			continue;
		channr = bitpos * 8;
		for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
			if (hostbits[bitpos] & bitat) {
				portp = brdp->ports[(channr - 1)];
				if (stli_hostcmd(brdp, portp)) {
					slavebitchange++;
					slavebits[bitpos] |= bitat;
				}
			}
		}
	}

/*
 *	If any of the ports are no longer busy then update them in the
 *	slave request bits. We need to do this after, since a host port
 *	service may initiate more slave requests.
 */
	if (slavebitchange) {
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		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		slavep = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset;
L
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		for (bitpos = 0; (bitpos < bitsize); bitpos++) {
A
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			if (readb(slavebits + bitpos))
				writeb(readb(slavep + bitpos) & ~slavebits[bitpos], slavebits + bitpos);
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		}
	}
}

/*****************************************************************************/

/*
 *	Driver poll routine. This routine polls the boards in use and passes
 *	messages back up to host when necessary. This is actually very
 *	CPU efficient, since we will always have the kernel poll clock, it
 *	adds only a few cycles when idle (since board service can be
 *	determined very easily), but when loaded generates no interrupts
 *	(with their expensive associated context change).
 */

static void stli_poll(unsigned long arg)
{
A
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	cdkhdr_t __iomem *hdrp;
2605
	struct stlibrd *brdp;
2606
	unsigned int brdnr;
L
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	stli_timerlist.expires = STLI_TIMEOUT;
	add_timer(&stli_timerlist);

/*
 *	Check each board and do any servicing required.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
A
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		if (brdp == NULL)
L
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			continue;
		if ((brdp->state & BST_STARTED) == 0)
			continue;

A
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		spin_lock(&brd_lock);
L
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		EBRDENABLE(brdp);
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		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		if (readb(&hdrp->hostreq))
L
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			stli_brdpoll(brdp, hdrp);
		EBRDDISABLE(brdp);
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		spin_unlock(&brd_lock);
L
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	}
}

/*****************************************************************************/

/*
 *	Translate the termios settings into the port setting structure of
 *	the slave.
 */

2638
static void stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp)
L
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{
	memset(pp, 0, sizeof(asyport_t));

/*
 *	Start of by setting the baud, char size, parity and stop bit info.
 */
2645
	pp->baudout = tty_get_baud_rate(portp->tty);
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	if ((tiosp->c_cflag & CBAUD) == B38400) {
		if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
			pp->baudout = 57600;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
			pp->baudout = 115200;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
			pp->baudout = 230400;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
			pp->baudout = 460800;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
			pp->baudout = (portp->baud_base / portp->custom_divisor);
	}
	if (pp->baudout > STL_MAXBAUD)
		pp->baudout = STL_MAXBAUD;
	pp->baudin = pp->baudout;

	switch (tiosp->c_cflag & CSIZE) {
	case CS5:
		pp->csize = 5;
		break;
	case CS6:
		pp->csize = 6;
		break;
	case CS7:
		pp->csize = 7;
		break;
	default:
		pp->csize = 8;
		break;
	}

	if (tiosp->c_cflag & CSTOPB)
		pp->stopbs = PT_STOP2;
	else
		pp->stopbs = PT_STOP1;

	if (tiosp->c_cflag & PARENB) {
		if (tiosp->c_cflag & PARODD)
			pp->parity = PT_ODDPARITY;
		else
			pp->parity = PT_EVENPARITY;
	} else {
		pp->parity = PT_NOPARITY;
	}

/*
 *	Set up any flow control options enabled.
 */
	if (tiosp->c_iflag & IXON) {
		pp->flow |= F_IXON;
		if (tiosp->c_iflag & IXANY)
			pp->flow |= F_IXANY;
	}
	if (tiosp->c_cflag & CRTSCTS)
		pp->flow |= (F_RTSFLOW | F_CTSFLOW);

	pp->startin = tiosp->c_cc[VSTART];
	pp->stopin = tiosp->c_cc[VSTOP];
	pp->startout = tiosp->c_cc[VSTART];
	pp->stopout = tiosp->c_cc[VSTOP];

/*
 *	Set up the RX char marking mask with those RX error types we must
 *	catch. We can get the slave to help us out a little here, it will
 *	ignore parity errors and breaks for us, and mark parity errors in
 *	the data stream.
 */
	if (tiosp->c_iflag & IGNPAR)
		pp->iflag |= FI_IGNRXERRS;
	if (tiosp->c_iflag & IGNBRK)
		pp->iflag |= FI_IGNBREAK;

	portp->rxmarkmsk = 0;
	if (tiosp->c_iflag & (INPCK | PARMRK))
		pp->iflag |= FI_1MARKRXERRS;
	if (tiosp->c_iflag & BRKINT)
		portp->rxmarkmsk |= BRKINT;

/*
 *	Set up clocal processing as required.
 */
	if (tiosp->c_cflag & CLOCAL)
		portp->flags &= ~ASYNC_CHECK_CD;
	else
		portp->flags |= ASYNC_CHECK_CD;

/*
 *	Transfer any persistent flags into the asyport structure.
 */
	pp->pflag = (portp->pflag & 0xffff);
	pp->vmin = (portp->pflag & P_RXIMIN) ? 1 : 0;
	pp->vtime = (portp->pflag & P_RXITIME) ? 1 : 0;
	pp->cc[1] = (portp->pflag & P_RXTHOLD) ? 1 : 0;
}

/*****************************************************************************/

/*
 *	Construct a slave signals structure for setting the DTR and RTS
 *	signals as specified.
 */

static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
{
	memset(sp, 0, sizeof(asysigs_t));
	if (dtr >= 0) {
		sp->signal |= SG_DTR;
		sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
	}
	if (rts >= 0) {
		sp->signal |= SG_RTS;
		sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
	}
}

/*****************************************************************************/

/*
 *	Convert the signals returned from the slave into a local TIOCM type
 *	signals value. We keep them locally in TIOCM format.
 */

static long stli_mktiocm(unsigned long sigvalue)
{
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	long	tiocm = 0;
L
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	tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
	tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
	tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
	tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
	tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
	tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
	return(tiocm);
}

/*****************************************************************************/

/*
 *	All panels and ports actually attached have been worked out. All
 *	we need to do here is set up the appropriate per port data structures.
 */

2787
static int stli_initports(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2788
{
2789
	struct stliport	*portp;
2790
	unsigned int i, panelnr, panelport;
L
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	for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2793
		portp = kzalloc(sizeof(struct stliport), GFP_KERNEL);
2794
		if (!portp) {
L
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			printk("STALLION: failed to allocate port structure\n");
			continue;
		}

		portp->magic = STLI_PORTMAGIC;
		portp->portnr = i;
		portp->brdnr = brdp->brdnr;
		portp->panelnr = panelnr;
		portp->baud_base = STL_BAUDBASE;
		portp->close_delay = STL_CLOSEDELAY;
		portp->closing_wait = 30 * HZ;
2806
		INIT_WORK(&portp->tqhangup, stli_dohangup);
L
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2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817
		init_waitqueue_head(&portp->open_wait);
		init_waitqueue_head(&portp->close_wait);
		init_waitqueue_head(&portp->raw_wait);
		panelport++;
		if (panelport >= brdp->panels[panelnr]) {
			panelport = 0;
			panelnr++;
		}
		brdp->ports[i] = portp;
	}

A
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2818
	return 0;
L
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2819 2820 2821 2822 2823 2824 2825 2826
}

/*****************************************************************************/

/*
 *	All the following routines are board specific hardware operations.
 */

2827
static void stli_ecpinit(struct stlibrd *brdp)
L
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{
	unsigned long	memconf;

	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(100);

	memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
	outb(memconf, (brdp->iobase + ECP_ATMEMAR));
}

/*****************************************************************************/

2842
static void stli_ecpenable(struct stlibrd *brdp)
L
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2843 2844 2845 2846 2847 2848
{	
	outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
}

/*****************************************************************************/

2849
static void stli_ecpdisable(struct stlibrd *brdp)
L
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2850 2851 2852 2853 2854 2855
{	
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
}

/*****************************************************************************/

2856
static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2857
{	
2858
	void __iomem *ptr;
A
Alan Cox 已提交
2859
	unsigned char val;
L
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	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
		val = (unsigned char) (offset / ECP_ATPAGESIZE);
	}
	outb(val, (brdp->iobase + ECP_ATMEMPR));
	return(ptr);
}

/*****************************************************************************/

2877
static void stli_ecpreset(struct stlibrd *brdp)
L
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2878 2879 2880 2881 2882 2883 2884 2885 2886
{	
	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(500);
}

/*****************************************************************************/

2887
static void stli_ecpintr(struct stlibrd *brdp)
L
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2888 2889 2890 2891 2892 2893 2894 2895 2896 2897
{	
	outb(0x1, brdp->iobase);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP EISA boards.
 */

2898
static void stli_ecpeiinit(struct stlibrd *brdp)
L
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2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915
{
	unsigned long	memconf;

	outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
	outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
	udelay(10);
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
	udelay(500);

	memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
	outb(memconf, (brdp->iobase + ECP_EIMEMARL));
	memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
	outb(memconf, (brdp->iobase + ECP_EIMEMARH));
}

/*****************************************************************************/

2916
static void stli_ecpeienable(struct stlibrd *brdp)
L
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2917 2918 2919 2920 2921 2922
{	
	outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
}

/*****************************************************************************/

2923
static void stli_ecpeidisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2924 2925 2926 2927 2928 2929
{	
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
}

/*****************************************************************************/

2930
static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2931
{	
2932
	void __iomem *ptr;
L
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2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953
	unsigned char	val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
		if (offset < ECP_EIPAGESIZE)
			val = ECP_EIENABLE;
		else
			val = ECP_EIENABLE | 0x40;
	}
	outb(val, (brdp->iobase + ECP_EICONFR));
	return(ptr);
}

/*****************************************************************************/

2954
static void stli_ecpeireset(struct stlibrd *brdp)
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{	
	outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
	udelay(10);
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP MCA boards.
 */

2968
static void stli_ecpmcenable(struct stlibrd *brdp)
L
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2969 2970 2971 2972 2973 2974
{	
	outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
}

/*****************************************************************************/

2975
static void stli_ecpmcdisable(struct stlibrd *brdp)
L
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2976 2977 2978 2979 2980 2981
{	
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
}

/*****************************************************************************/

2982
static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2983
{	
2984
	void __iomem *ptr;
A
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2985
	unsigned char val;
L
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2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
		val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
	}
	outb(val, (brdp->iobase + ECP_MCCONFR));
	return(ptr);
}

/*****************************************************************************/

3003
static void stli_ecpmcreset(struct stlibrd *brdp)
L
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{	
	outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
	udelay(10);
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following set of functions act on ECP PCI boards.
 */

3017
static void stli_ecppciinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3018 3019 3020 3021 3022 3023 3024 3025 3026
{
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

/*****************************************************************************/

3027
static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3028
{	
3029
	void __iomem *ptr;
L
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3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047
	unsigned char	val;

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), board=%d\n",
				(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ECP_PCIPAGESIZE);
		val = (offset / ECP_PCIPAGESIZE) << 1;
	}
	outb(val, (brdp->iobase + ECP_PCICONFR));
	return(ptr);
}

/*****************************************************************************/

3048
static void stli_ecppcireset(struct stlibrd *brdp)
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{	
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

/*****************************************************************************/

/*
 *	The following routines act on ONboards.
 */

3062
static void stli_onbinit(struct stlibrd *brdp)
L
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{
	unsigned long	memconf;

	outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
	udelay(10);
	outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
	mdelay(1000);

	memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
	outb(memconf, (brdp->iobase + ONB_ATMEMAR));
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

3079
static void stli_onbenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3080 3081 3082 3083 3084 3085
{	
	outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
}

/*****************************************************************************/

3086
static void stli_onbdisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3087 3088 3089 3090 3091 3092
{	
	outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
}

/*****************************************************************************/

3093
static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3094
{	
3095
	void __iomem *ptr;
L
Linus Torvalds 已提交
3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
				(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
	} else {
		ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
	}
	return(ptr);
}

/*****************************************************************************/

3110
static void stli_onbreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123
{	
	outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
	udelay(10);
	outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on ONboard EISA.
 */

3124
static void stli_onbeinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143
{
	unsigned long	memconf;

	outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
	outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
	udelay(10);
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
	mdelay(1000);

	memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
	outb(memconf, (brdp->iobase + ONB_EIMEMARL));
	memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
	outb(memconf, (brdp->iobase + ONB_EIMEMARH));
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

3144
static void stli_onbeenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3145 3146 3147 3148 3149 3150
{	
	outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
}

/*****************************************************************************/

3151
static void stli_onbedisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3152 3153 3154 3155 3156 3157
{	
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
}

/*****************************************************************************/

3158
static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3159
{	
3160
	void __iomem *ptr;
A
Alan Cox 已提交
3161
	unsigned char val;
L
Linus Torvalds 已提交
3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181

	if (offset > brdp->memsize) {
		printk(KERN_ERR "STALLION: shared memory pointer=%x out of "
				"range at line=%d(%d), brd=%d\n",
			(int) offset, line, __LINE__, brdp->brdnr);
		ptr = NULL;
		val = 0;
	} else {
		ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
		if (offset < ONB_EIPAGESIZE)
			val = ONB_EIENABLE;
		else
			val = ONB_EIENABLE | 0x40;
	}
	outb(val, (brdp->iobase + ONB_EICONFR));
	return(ptr);
}

/*****************************************************************************/

3182
static void stli_onbereset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195
{	
	outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
	udelay(10);
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on Brumby boards.
 */

3196
static void stli_bbyinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207
{
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
	outb(0x1, brdp->iobase);
	mdelay(1);
}

/*****************************************************************************/

3208
static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3209
{	
3210
	void __iomem *ptr;
A
Alan Cox 已提交
3211
	unsigned char val;
L
Linus Torvalds 已提交
3212

A
Alan Cox 已提交
3213
	BUG_ON(offset > brdp->memsize);
L
Linus Torvalds 已提交
3214

A
Alan Cox 已提交
3215 3216
	ptr = brdp->membase + (offset % BBY_PAGESIZE);
	val = (unsigned char) (offset / BBY_PAGESIZE);
L
Linus Torvalds 已提交
3217 3218 3219 3220 3221 3222
	outb(val, (brdp->iobase + BBY_ATCONFR));
	return(ptr);
}

/*****************************************************************************/

3223
static void stli_bbyreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236
{	
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	The following routines act on original old Stallion boards.
 */

3237
static void stli_stalinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3238 3239 3240 3241 3242 3243 3244
{
	outb(0x1, brdp->iobase);
	mdelay(1000);
}

/*****************************************************************************/

3245
static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3246
{	
A
Alan Cox 已提交
3247 3248
	BUG_ON(offset > brdp->memsize);
	return brdp->membase + (offset % STAL_PAGESIZE);
L
Linus Torvalds 已提交
3249 3250 3251 3252
}

/*****************************************************************************/

3253
static void stli_stalreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3254
{	
A
Alan Cox 已提交
3255
	u32 __iomem *vecp;
L
Linus Torvalds 已提交
3256

A
Alan Cox 已提交
3257 3258
	vecp = (u32 __iomem *) (brdp->membase + 0x30);
	writel(0xffff0000, vecp);
L
Linus Torvalds 已提交
3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269
	outb(0, brdp->iobase);
	mdelay(1000);
}

/*****************************************************************************/

/*
 *	Try to find an ECP board and initialize it. This handles only ECP
 *	board types.
 */

3270
static int stli_initecp(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3271
{
A
Alan Cox 已提交
3272 3273 3274 3275
	cdkecpsig_t sig;
	cdkecpsig_t __iomem *sigsp;
	unsigned int status, nxtid;
	char *name;
3276
	int retval, panelnr, nrports;
L
Linus Torvalds 已提交
3277

3278 3279 3280 3281 3282 3283 3284 3285
	if ((brdp->iobase == 0) || (brdp->memaddr == 0)) {
		retval = -ENODEV;
		goto err;
	}

	if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
		retval = -EIO;
		goto err;
L
Linus Torvalds 已提交
3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348
	}

	brdp->iosize = ECP_IOSIZE;

/*
 *	Based on the specific board type setup the common vars to access
 *	and enable shared memory. Set all board specific information now
 *	as well.
 */
	switch (brdp->brdtype) {
	case BRD_ECP:
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_ATPAGESIZE;
		brdp->init = stli_ecpinit;
		brdp->enable = stli_ecpenable;
		brdp->reenable = stli_ecpenable;
		brdp->disable = stli_ecpdisable;
		brdp->getmemptr = stli_ecpgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpreset;
		name = "serial(EC8/64)";
		break;

	case BRD_ECPE:
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_EIPAGESIZE;
		brdp->init = stli_ecpeiinit;
		brdp->enable = stli_ecpeienable;
		brdp->reenable = stli_ecpeienable;
		brdp->disable = stli_ecpeidisable;
		brdp->getmemptr = stli_ecpeigetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpeireset;
		name = "serial(EC8/64-EI)";
		break;

	case BRD_ECPMC:
		brdp->memsize = ECP_MEMSIZE;
		brdp->pagesize = ECP_MCPAGESIZE;
		brdp->init = NULL;
		brdp->enable = stli_ecpmcenable;
		brdp->reenable = stli_ecpmcenable;
		brdp->disable = stli_ecpmcdisable;
		brdp->getmemptr = stli_ecpmcgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecpmcreset;
		name = "serial(EC8/64-MCA)";
		break;

	case BRD_ECPPCI:
		brdp->memsize = ECP_PCIMEMSIZE;
		brdp->pagesize = ECP_PCIPAGESIZE;
		brdp->init = stli_ecppciinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_ecppcigetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_ecppcireset;
		name = "serial(EC/RA-PCI)";
		break;

	default:
3349 3350
		retval = -EINVAL;
		goto err_reg;
L
Linus Torvalds 已提交
3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361
	}

/*
 *	The per-board operations structure is all set up, so now let's go
 *	and get the board operational. Firstly initialize board configuration
 *	registers. Set the memory mapping info so we can get at the boards
 *	shared memory.
 */
	EBRDINIT(brdp);

	brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
3362 3363 3364
	if (brdp->membase == NULL) {
		retval = -ENOMEM;
		goto err_reg;
L
Linus Torvalds 已提交
3365 3366 3367 3368 3369 3370 3371 3372
	}

/*
 *	Now that all specific code is set up, enable the shared memory and
 *	look for the a signature area that will tell us exactly what board
 *	this is, and what it is connected to it.
 */
	EBRDENABLE(brdp);
A
Alan Cox 已提交
3373
	sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3374
	memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t));
L
Linus Torvalds 已提交
3375 3376
	EBRDDISABLE(brdp);

3377 3378 3379
	if (sig.magic != cpu_to_le32(ECP_MAGIC)) {
		retval = -ENODEV;
		goto err_unmap;
L
Linus Torvalds 已提交
3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402
	}

/*
 *	Scan through the signature looking at the panels connected to the
 *	board. Calculate the total number of ports as we go.
 */
	for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
		status = sig.panelid[nxtid];
		if ((status & ECH_PNLIDMASK) != nxtid)
			break;

		brdp->panelids[panelnr] = status;
		nrports = (status & ECH_PNL16PORT) ? 16 : 8;
		if ((nrports == 16) && ((status & ECH_PNLXPID) == 0))
			nxtid++;
		brdp->panels[panelnr] = nrports;
		brdp->nrports += nrports;
		nxtid++;
		brdp->nrpanels++;
	}


	brdp->state |= BST_FOUND;
A
Alan Cox 已提交
3403
	return 0;
3404 3405 3406 3407 3408 3409 3410
err_unmap:
	iounmap(brdp->membase);
	brdp->membase = NULL;
err_reg:
	release_region(brdp->iobase, brdp->iosize);
err:
	return retval;
L
Linus Torvalds 已提交
3411 3412 3413 3414 3415 3416 3417 3418 3419
}

/*****************************************************************************/

/*
 *	Try to find an ONboard, Brumby or Stallion board and initialize it.
 *	This handles only these board types.
 */

3420
static int stli_initonb(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3421
{
A
Alan Cox 已提交
3422 3423 3424
	cdkonbsig_t sig;
	cdkonbsig_t __iomem *sigsp;
	char *name;
3425
	int i, retval;
L
Linus Torvalds 已提交
3426 3427 3428 3429

/*
 *	Do a basic sanity check on the IO and memory addresses.
 */
3430 3431 3432 3433
	if (brdp->iobase == 0 || brdp->memaddr == 0) {
		retval = -ENODEV;
		goto err;
	}
L
Linus Torvalds 已提交
3434 3435 3436

	brdp->iosize = ONB_IOSIZE;
	
3437 3438 3439 3440
	if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
		retval = -EIO;
		goto err;
	}
L
Linus Torvalds 已提交
3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505

/*
 *	Based on the specific board type setup the common vars to access
 *	and enable shared memory. Set all board specific information now
 *	as well.
 */
	switch (brdp->brdtype) {
	case BRD_ONBOARD:
	case BRD_ONBOARD2:
		brdp->memsize = ONB_MEMSIZE;
		brdp->pagesize = ONB_ATPAGESIZE;
		brdp->init = stli_onbinit;
		brdp->enable = stli_onbenable;
		brdp->reenable = stli_onbenable;
		brdp->disable = stli_onbdisable;
		brdp->getmemptr = stli_onbgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_onbreset;
		if (brdp->memaddr > 0x100000)
			brdp->enabval = ONB_MEMENABHI;
		else
			brdp->enabval = ONB_MEMENABLO;
		name = "serial(ONBoard)";
		break;

	case BRD_ONBOARDE:
		brdp->memsize = ONB_EIMEMSIZE;
		brdp->pagesize = ONB_EIPAGESIZE;
		brdp->init = stli_onbeinit;
		brdp->enable = stli_onbeenable;
		brdp->reenable = stli_onbeenable;
		brdp->disable = stli_onbedisable;
		brdp->getmemptr = stli_onbegetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_onbereset;
		name = "serial(ONBoard/E)";
		break;

	case BRD_BRUMBY4:
		brdp->memsize = BBY_MEMSIZE;
		brdp->pagesize = BBY_PAGESIZE;
		brdp->init = stli_bbyinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_bbygetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_bbyreset;
		name = "serial(Brumby)";
		break;

	case BRD_STALLION:
		brdp->memsize = STAL_MEMSIZE;
		brdp->pagesize = STAL_PAGESIZE;
		brdp->init = stli_stalinit;
		brdp->enable = NULL;
		brdp->reenable = NULL;
		brdp->disable = NULL;
		brdp->getmemptr = stli_stalgetmemptr;
		brdp->intr = stli_ecpintr;
		brdp->reset = stli_stalreset;
		name = "serial(Stallion)";
		break;

	default:
3506 3507
		retval = -EINVAL;
		goto err_reg;
L
Linus Torvalds 已提交
3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518
	}

/*
 *	The per-board operations structure is all set up, so now let's go
 *	and get the board operational. Firstly initialize board configuration
 *	registers. Set the memory mapping info so we can get at the boards
 *	shared memory.
 */
	EBRDINIT(brdp);

	brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
3519 3520 3521
	if (brdp->membase == NULL) {
		retval = -ENOMEM;
		goto err_reg;
L
Linus Torvalds 已提交
3522 3523 3524 3525 3526 3527 3528 3529
	}

/*
 *	Now that all specific code is set up, enable the shared memory and
 *	look for the a signature area that will tell us exactly what board
 *	this is, and how many ports.
 */
	EBRDENABLE(brdp);
A
Alan Cox 已提交
3530 3531
	sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
	memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t));
L
Linus Torvalds 已提交
3532 3533
	EBRDDISABLE(brdp);

A
Alan Cox 已提交
3534 3535 3536
	if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
	    sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
	    sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
3537 3538 3539
	    sig.magic3 != cpu_to_le16(ONB_MAGIC3)) {
		retval = -ENODEV;
		goto err_unmap;
L
Linus Torvalds 已提交
3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559
	}

/*
 *	Scan through the signature alive mask and calculate how many ports
 *	there are on this board.
 */
	brdp->nrpanels = 1;
	if (sig.amask1) {
		brdp->nrports = 32;
	} else {
		for (i = 0; (i < 16); i++) {
			if (((sig.amask0 << i) & 0x8000) == 0)
				break;
		}
		brdp->nrports = i;
	}
	brdp->panels[0] = brdp->nrports;


	brdp->state |= BST_FOUND;
A
Alan Cox 已提交
3560
	return 0;
3561 3562 3563 3564 3565 3566 3567
err_unmap:
	iounmap(brdp->membase);
	brdp->membase = NULL;
err_reg:
	release_region(brdp->iobase, brdp->iosize);
err:
	return retval;
L
Linus Torvalds 已提交
3568 3569 3570 3571 3572 3573 3574 3575 3576 3577
}

/*****************************************************************************/

/*
 *	Start up a running board. This routine is only called after the
 *	code has been down loaded to the board and is operational. It will
 *	read in the memory map, and get the show on the road...
 */

3578
static int stli_startbrd(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3579
{
A
Alan Cox 已提交
3580 3581 3582 3583
	cdkhdr_t __iomem *hdrp;
	cdkmem_t __iomem *memp;
	cdkasy_t __iomem *ap;
	unsigned long flags;
3584
	unsigned int portnr, nrdevs, i;
3585
	struct stliport *portp;
3586
	int rc = 0;
A
Alan Cox 已提交
3587 3588 3589
	u32 memoff;

	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
3590
	EBRDENABLE(brdp);
A
Alan Cox 已提交
3591
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
L
Linus Torvalds 已提交
3592 3593 3594 3595 3596
	nrdevs = hdrp->nrdevs;

#if 0
	printk("%s(%d): CDK version %d.%d.%d --> "
		"nrdevs=%d memp=%x hostp=%x slavep=%x\n",
A
Alan Cox 已提交
3597 3598 3599
		 __FILE__, __LINE__, readb(&hdrp->ver_release), readb(&hdrp->ver_modification),
		 readb(&hdrp->ver_fix), nrdevs, (int) readl(&hdrp->memp), readl(&hdrp->hostp),
		 readl(&hdrp->slavep));
L
Linus Torvalds 已提交
3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610
#endif

	if (nrdevs < (brdp->nrports + 1)) {
		printk(KERN_ERR "STALLION: slave failed to allocate memory for "
				"all devices, devices=%d\n", nrdevs);
		brdp->nrports = nrdevs - 1;
	}
	brdp->nrdevs = nrdevs;
	brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
	brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
	brdp->bitsize = (nrdevs + 7) / 8;
A
Alan Cox 已提交
3611 3612
	memoff = readl(&hdrp->memp);
	if (memoff > brdp->memsize) {
L
Linus Torvalds 已提交
3613 3614 3615 3616
		printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
		rc = -EIO;
		goto stli_donestartup;
	}
A
Alan Cox 已提交
3617 3618
	memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
	if (readw(&memp->dtype) != TYP_ASYNCTRL) {
L
Linus Torvalds 已提交
3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629
		printk(KERN_ERR "STALLION: no slave control device found\n");
		goto stli_donestartup;
	}
	memp++;

/*
 *	Cycle through memory allocation of each port. We are guaranteed to
 *	have all ports inside the first page of slave window, so no need to
 *	change pages while reading memory map.
 */
	for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
A
Alan Cox 已提交
3630
		if (readw(&memp->dtype) != TYP_ASYNC)
L
Linus Torvalds 已提交
3631 3632
			break;
		portp = brdp->ports[portnr];
A
Alan Cox 已提交
3633
		if (portp == NULL)
L
Linus Torvalds 已提交
3634 3635
			break;
		portp->devnr = i;
A
Alan Cox 已提交
3636
		portp->addr = readl(&memp->offset);
L
Linus Torvalds 已提交
3637 3638 3639 3640 3641
		portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
		portp->portidx = (unsigned char) (i / 8);
		portp->portbit = (unsigned char) (0x1 << (i % 8));
	}

A
Alan Cox 已提交
3642
	writeb(0xff, &hdrp->slavereq);
L
Linus Torvalds 已提交
3643 3644 3645 3646 3647 3648 3649 3650

/*
 *	For each port setup a local copy of the RX and TX buffer offsets
 *	and sizes. We do this separate from the above, because we need to
 *	move the shared memory page...
 */
	for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
		portp = brdp->ports[portnr];
A
Alan Cox 已提交
3651
		if (portp == NULL)
L
Linus Torvalds 已提交
3652 3653 3654
			break;
		if (portp->addr == 0)
			break;
A
Alan Cox 已提交
3655 3656 3657 3658 3659 3660
		ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
		if (ap != NULL) {
			portp->rxsize = readw(&ap->rxq.size);
			portp->txsize = readw(&ap->txq.size);
			portp->rxoffset = readl(&ap->rxq.offset);
			portp->txoffset = readl(&ap->txq.offset);
L
Linus Torvalds 已提交
3661 3662 3663 3664 3665
		}
	}

stli_donestartup:
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
3666
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
3667 3668 3669 3670 3671 3672 3673 3674 3675 3676

	if (rc == 0)
		brdp->state |= BST_STARTED;

	if (! stli_timeron) {
		stli_timeron++;
		stli_timerlist.expires = STLI_TIMEOUT;
		add_timer(&stli_timerlist);
	}

A
Alan Cox 已提交
3677
	return rc;
L
Linus Torvalds 已提交
3678 3679 3680 3681 3682 3683 3684 3685
}

/*****************************************************************************/

/*
 *	Probe and initialize the specified board.
 */

3686
static int __devinit stli_brdinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3687
{
3688 3689
	int retval;

L
Linus Torvalds 已提交
3690 3691 3692 3693 3694
	switch (brdp->brdtype) {
	case BRD_ECP:
	case BRD_ECPE:
	case BRD_ECPMC:
	case BRD_ECPPCI:
3695
		retval = stli_initecp(brdp);
L
Linus Torvalds 已提交
3696 3697 3698 3699 3700 3701
		break;
	case BRD_ONBOARD:
	case BRD_ONBOARDE:
	case BRD_ONBOARD2:
	case BRD_BRUMBY4:
	case BRD_STALLION:
3702
		retval = stli_initonb(brdp);
L
Linus Torvalds 已提交
3703 3704 3705 3706
		break;
	default:
		printk(KERN_ERR "STALLION: board=%d is unknown board "
				"type=%d\n", brdp->brdnr, brdp->brdtype);
3707
		retval = -ENODEV;
L
Linus Torvalds 已提交
3708 3709
	}

3710 3711
	if (retval)
		return retval;
L
Linus Torvalds 已提交
3712 3713 3714 3715 3716 3717

	stli_initports(brdp);
	printk(KERN_INFO "STALLION: %s found, board=%d io=%x mem=%x "
		"nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype],
		brdp->brdnr, brdp->iobase, (int) brdp->memaddr,
		brdp->nrpanels, brdp->nrports);
A
Alan Cox 已提交
3718
	return 0;
L
Linus Torvalds 已提交
3719 3720
}

3721
#if STLI_EISAPROBE != 0
L
Linus Torvalds 已提交
3722 3723 3724 3725 3726 3727 3728
/*****************************************************************************/

/*
 *	Probe around trying to find where the EISA boards shared memory
 *	might be. This is a bit if hack, but it is the best we can do.
 */

3729
static int stli_eisamemprobe(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3730
{
A
Alan Cox 已提交
3731 3732
	cdkecpsig_t	ecpsig, __iomem *ecpsigp;
	cdkonbsig_t	onbsig, __iomem *onbsigp;
L
Linus Torvalds 已提交
3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757
	int		i, foundit;

/*
 *	First up we reset the board, to get it into a known state. There
 *	is only 2 board types here we need to worry about. Don;t use the
 *	standard board init routine here, it programs up the shared
 *	memory address, and we don't know it yet...
 */
	if (brdp->brdtype == BRD_ECPE) {
		outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
		outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
		udelay(10);
		outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
		udelay(500);
		stli_ecpeienable(brdp);
	} else if (brdp->brdtype == BRD_ONBOARDE) {
		outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
		outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
		udelay(10);
		outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
		mdelay(100);
		outb(0x1, brdp->iobase);
		mdelay(1);
		stli_onbeenable(brdp);
	} else {
A
Alan Cox 已提交
3758
		return -ENODEV;
L
Linus Torvalds 已提交
3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770
	}

	foundit = 0;
	brdp->memsize = ECP_MEMSIZE;

/*
 *	Board shared memory is enabled, so now we have a poke around and
 *	see if we can find it.
 */
	for (i = 0; (i < stli_eisamempsize); i++) {
		brdp->memaddr = stli_eisamemprobeaddrs[i];
		brdp->membase = ioremap(brdp->memaddr, brdp->memsize);
A
Alan Cox 已提交
3771
		if (brdp->membase == NULL)
L
Linus Torvalds 已提交
3772 3773 3774
			continue;

		if (brdp->brdtype == BRD_ECPE) {
3775
			ecpsigp = stli_ecpeigetmemptr(brdp,
L
Linus Torvalds 已提交
3776
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3777 3778
			memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
			if (ecpsig.magic == cpu_to_le32(ECP_MAGIC))
L
Linus Torvalds 已提交
3779 3780
				foundit = 1;
		} else {
A
Alan Cox 已提交
3781
			onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp,
L
Linus Torvalds 已提交
3782
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3783 3784 3785 3786 3787
			memcpy_fromio(&onbsig, onbsigp, sizeof(cdkonbsig_t));
			if ((onbsig.magic0 == cpu_to_le16(ONB_MAGIC0)) &&
			    (onbsig.magic1 == cpu_to_le16(ONB_MAGIC1)) &&
			    (onbsig.magic2 == cpu_to_le16(ONB_MAGIC2)) &&
			    (onbsig.magic3 == cpu_to_le16(ONB_MAGIC3)))
L
Linus Torvalds 已提交
3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810
				foundit = 1;
		}

		iounmap(brdp->membase);
		if (foundit)
			break;
	}

/*
 *	Regardless of whether we found the shared memory or not we must
 *	disable the region. After that return success or failure.
 */
	if (brdp->brdtype == BRD_ECPE)
		stli_ecpeidisable(brdp);
	else
		stli_onbedisable(brdp);

	if (! foundit) {
		brdp->memaddr = 0;
		brdp->membase = NULL;
		printk(KERN_ERR "STALLION: failed to probe shared memory "
				"region for %s in EISA slot=%d\n",
			stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
A
Alan Cox 已提交
3811
		return -ENODEV;
L
Linus Torvalds 已提交
3812
	}
A
Alan Cox 已提交
3813
	return 0;
L
Linus Torvalds 已提交
3814
}
3815
#endif
L
Linus Torvalds 已提交
3816 3817 3818

static int stli_getbrdnr(void)
{
3819
	unsigned int i;
L
Linus Torvalds 已提交
3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830

	for (i = 0; i < STL_MAXBRDS; i++) {
		if (!stli_brds[i]) {
			if (i >= stli_nrbrds)
				stli_nrbrds = i + 1;
			return i;
		}
	}
	return -1;
}

3831
#if STLI_EISAPROBE != 0
L
Linus Torvalds 已提交
3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845
/*****************************************************************************/

/*
 *	Probe around and try to find any EISA boards in system. The biggest
 *	problem here is finding out what memory address is associated with
 *	an EISA board after it is found. The registers of the ECPE and
 *	ONboardE are not readable - so we can't read them from there. We
 *	don't have access to the EISA CMOS (or EISA BIOS) so we don't
 *	actually have any way to find out the real value. The best we can
 *	do is go probing around in the usual places hoping we can find it.
 */

static int stli_findeisabrds(void)
{
3846
	struct stlibrd *brdp;
3847
	unsigned int iobase, eid, i;
3848
	int brdnr, found = 0;
L
Linus Torvalds 已提交
3849 3850

/*
A
Alan Cox 已提交
3851
 *	Firstly check if this is an EISA system.  If this is not an EISA system then
L
Linus Torvalds 已提交
3852 3853
 *	don't bother going any further!
 */
A
Alan Cox 已提交
3854 3855
	if (EISA_bus)
		return 0;
L
Linus Torvalds 已提交
3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872

/*
 *	Looks like an EISA system, so go searching for EISA boards.
 */
	for (iobase = 0x1000; (iobase <= 0xc000); iobase += 0x1000) {
		outb(0xff, (iobase + 0xc80));
		eid = inb(iobase + 0xc80);
		eid |= inb(iobase + 0xc81) << 8;
		if (eid != STL_EISAID)
			continue;

/*
 *		We have found a board. Need to check if this board was
 *		statically configured already (just in case!).
 */
		for (i = 0; (i < STL_MAXBRDS); i++) {
			brdp = stli_brds[i];
A
Alan Cox 已提交
3873
			if (brdp == NULL)
L
Linus Torvalds 已提交
3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884
				continue;
			if (brdp->iobase == iobase)
				break;
		}
		if (i < STL_MAXBRDS)
			continue;

/*
 *		We have found a Stallion board and it is not configured already.
 *		Allocate a board structure and initialize it.
 */
A
Alan Cox 已提交
3885
		if ((brdp = stli_allocbrd()) == NULL)
3886
			return found ? : -ENOMEM;
3887 3888
		brdnr = stli_getbrdnr();
		if (brdnr < 0)
3889
			return found ? : -ENOMEM;
3890
		brdp->brdnr = (unsigned int)brdnr;
L
Linus Torvalds 已提交
3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901
		eid = inb(iobase + 0xc82);
		if (eid == ECP_EISAID)
			brdp->brdtype = BRD_ECPE;
		else if (eid == ONB_EISAID)
			brdp->brdtype = BRD_ONBOARDE;
		else
			brdp->brdtype = BRD_UNKNOWN;
		brdp->iobase = iobase;
		outb(0x1, (iobase + 0xc84));
		if (stli_eisamemprobe(brdp))
			outb(0, (iobase + 0xc84));
3902 3903 3904 3905 3906
		if (stli_brdinit(brdp) < 0) {
			kfree(brdp);
			continue;
		}

3907
		stli_brds[brdp->brdnr] = brdp;
3908
		found++;
L
Linus Torvalds 已提交
3909 3910
	}

3911
	return found;
L
Linus Torvalds 已提交
3912
}
3913 3914 3915
#else
static inline int stli_findeisabrds(void) { return 0; }
#endif
L
Linus Torvalds 已提交
3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930

/*****************************************************************************/

/*
 *	Find the next available board number that is free.
 */

/*****************************************************************************/

/*
 *	We have a Stallion board. Allocate a board structure and
 *	initialize it. Read its IO and MEMORY resources from PCI
 *	configuration space.
 */

3931 3932
static int __devinit stli_pciprobe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
3933
{
3934
	struct stlibrd *brdp;
3935
	int brdnr, retval = -EIO;
3936 3937 3938 3939 3940 3941 3942 3943 3944

	retval = pci_enable_device(pdev);
	if (retval)
		goto err;
	brdp = stli_allocbrd();
	if (brdp == NULL) {
		retval = -ENOMEM;
		goto err;
	}
3945
	mutex_lock(&stli_brdslock);
3946
	brdnr = stli_getbrdnr();
3947
	if (brdnr < 0) {
L
Linus Torvalds 已提交
3948 3949
		printk(KERN_INFO "STALLION: too many boards found, "
			"maximum supported %d\n", STL_MAXBRDS);
3950
		mutex_unlock(&stli_brdslock);
3951 3952
		retval = -EIO;
		goto err_fr;
L
Linus Torvalds 已提交
3953
	}
3954
	brdp->brdnr = (unsigned int)brdnr;
3955 3956
	stli_brds[brdp->brdnr] = brdp;
	mutex_unlock(&stli_brdslock);
3957
	brdp->brdtype = BRD_ECPPCI;
L
Linus Torvalds 已提交
3958 3959 3960 3961
/*
 *	We have all resources from the board, so lets setup the actual
 *	board structure now.
 */
3962 3963 3964 3965
	brdp->iobase = pci_resource_start(pdev, 3);
	brdp->memaddr = pci_resource_start(pdev, 2);
	retval = stli_brdinit(brdp);
	if (retval)
3966
		goto err_null;
3967

3968
	brdp->state |= BST_PROBED;
3969
	pci_set_drvdata(pdev, brdp);
L
Linus Torvalds 已提交
3970

J
Jiri Slaby 已提交
3971 3972 3973 3974
	EBRDENABLE(brdp);
	brdp->enable = NULL;
	brdp->disable = NULL;

A
Alan Cox 已提交
3975
	return 0;
3976 3977
err_null:
	stli_brds[brdp->brdnr] = NULL;
3978 3979 3980 3981
err_fr:
	kfree(brdp);
err:
	return retval;
L
Linus Torvalds 已提交
3982 3983
}

3984 3985
static void stli_pciremove(struct pci_dev *pdev)
{
3986
	struct stlibrd *brdp = pci_get_drvdata(pdev);
L
Linus Torvalds 已提交
3987

3988
	stli_cleanup_ports(brdp);
L
Linus Torvalds 已提交
3989

3990 3991 3992
	iounmap(brdp->membase);
	if (brdp->iosize > 0)
		release_region(brdp->iobase, brdp->iosize);
L
Linus Torvalds 已提交
3993

3994 3995
	stli_brds[brdp->brdnr] = NULL;
	kfree(brdp);
L
Linus Torvalds 已提交
3996 3997
}

3998 3999 4000 4001 4002 4003
static struct pci_driver stli_pcidriver = {
	.name = "istallion",
	.id_table = istallion_pci_tbl,
	.probe = stli_pciprobe,
	.remove = __devexit_p(stli_pciremove)
};
L
Linus Torvalds 已提交
4004 4005 4006 4007 4008 4009
/*****************************************************************************/

/*
 *	Allocate a new board structure. Fill out the basic info in it.
 */

4010
static struct stlibrd *stli_allocbrd(void)
L
Linus Torvalds 已提交
4011
{
4012
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
4013

4014
	brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL);
4015
	if (!brdp) {
L
Linus Torvalds 已提交
4016
		printk(KERN_ERR "STALLION: failed to allocate memory "
4017
				"(size=%Zd)\n", sizeof(struct stlibrd));
4018
		return NULL;
L
Linus Torvalds 已提交
4019 4020
	}
	brdp->magic = STLI_BOARDMAGIC;
A
Alan Cox 已提交
4021
	return brdp;
L
Linus Torvalds 已提交
4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032
}

/*****************************************************************************/

/*
 *	Scan through all the boards in the configuration and see what we
 *	can find.
 */

static int stli_initbrds(void)
{
4033 4034
	struct stlibrd *brdp, *nxtbrdp;
	struct stlconf conf;
4035
	unsigned int i, j, found = 0;
4036
	int retval;
L
Linus Torvalds 已提交
4037

4038 4039 4040 4041 4042
	for (stli_nrbrds = 0; stli_nrbrds < ARRAY_SIZE(stli_brdsp);
			stli_nrbrds++) {
		memset(&conf, 0, sizeof(conf));
		if (stli_parsebrd(&conf, stli_brdsp[stli_nrbrds]) == 0)
			continue;
A
Alan Cox 已提交
4043
		if ((brdp = stli_allocbrd()) == NULL)
4044 4045 4046 4047 4048
			continue;
		brdp->brdnr = stli_nrbrds;
		brdp->brdtype = conf.brdtype;
		brdp->iobase = conf.ioaddr1;
		brdp->memaddr = conf.memaddr;
4049 4050 4051 4052
		if (stli_brdinit(brdp) < 0) {
			kfree(brdp);
			continue;
		}
4053
		stli_brds[brdp->brdnr] = brdp;
4054
		found++;
L
Linus Torvalds 已提交
4055 4056
	}

4057 4058 4059
	retval = stli_findeisabrds();
	if (retval > 0)
		found += retval;
4060

L
Linus Torvalds 已提交
4061 4062 4063 4064 4065 4066 4067 4068 4069
/*
 *	All found boards are initialized. Now for a little optimization, if
 *	no boards are sharing the "shared memory" regions then we can just
 *	leave them all enabled. This is in fact the usual case.
 */
	stli_shared = 0;
	if (stli_nrbrds > 1) {
		for (i = 0; (i < stli_nrbrds); i++) {
			brdp = stli_brds[i];
A
Alan Cox 已提交
4070
			if (brdp == NULL)
L
Linus Torvalds 已提交
4071 4072 4073
				continue;
			for (j = i + 1; (j < stli_nrbrds); j++) {
				nxtbrdp = stli_brds[j];
A
Alan Cox 已提交
4074
				if (nxtbrdp == NULL)
L
Linus Torvalds 已提交
4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088
					continue;
				if ((brdp->membase >= nxtbrdp->membase) &&
				    (brdp->membase <= (nxtbrdp->membase +
				    nxtbrdp->memsize - 1))) {
					stli_shared++;
					break;
				}
			}
		}
	}

	if (stli_shared == 0) {
		for (i = 0; (i < stli_nrbrds); i++) {
			brdp = stli_brds[i];
A
Alan Cox 已提交
4089
			if (brdp == NULL)
L
Linus Torvalds 已提交
4090 4091 4092 4093 4094 4095 4096 4097 4098
				continue;
			if (brdp->state & BST_FOUND) {
				EBRDENABLE(brdp);
				brdp->enable = NULL;
				brdp->disable = NULL;
			}
		}
	}

J
Jiri Slaby 已提交
4099 4100 4101 4102 4103 4104 4105
	retval = pci_register_driver(&stli_pcidriver);
	if (retval && found == 0) {
		printk(KERN_ERR "Neither isa nor eisa cards found nor pci "
				"driver can be registered!\n");
		goto err;
	}

A
Alan Cox 已提交
4106
	return 0;
4107 4108
err:
	return retval;
L
Linus Torvalds 已提交
4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120
}

/*****************************************************************************/

/*
 *	Code to handle an "staliomem" read operation. This device is the 
 *	contents of the board shared memory. It is used for down loading
 *	the slave image (and debugging :-)
 */

static ssize_t stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp)
{
A
Alan Cox 已提交
4121
	unsigned long flags;
4122
	void __iomem *memptr;
4123
	struct stlibrd *brdp;
4124 4125
	unsigned int brdnr;
	int size, n;
A
Alan Cox 已提交
4126 4127
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4128

4129
	brdnr = iminor(fp->f_path.dentry->d_inode);
L
Linus Torvalds 已提交
4130
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4131
		return -ENODEV;
L
Linus Torvalds 已提交
4132
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4133 4134
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4135
	if (brdp->state == 0)
A
Alan Cox 已提交
4136 4137 4138
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4139

4140
	size = min(count, (size_t)(brdp->memsize - off));
A
Alan Cox 已提交
4141 4142 4143 4144 4145 4146 4147 4148

	/*
	 *	Copy the data a page at a time
	 */

	p = (void *)__get_free_page(GFP_KERNEL);
	if(p == NULL)
		return -ENOMEM;
L
Linus Torvalds 已提交
4149 4150

	while (size > 0) {
A
Alan Cox 已提交
4151 4152
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
4153
		memptr = EBRDGETMEMPTR(brdp, off);
4154 4155
		n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = min(n, (int)PAGE_SIZE);
A
Alan Cox 已提交
4156 4157 4158 4159
		memcpy_fromio(p, memptr, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		if (copy_to_user(buf, p, n)) {
L
Linus Torvalds 已提交
4160 4161 4162
			count = -EFAULT;
			goto out;
		}
A
Alan Cox 已提交
4163
		off += n;
L
Linus Torvalds 已提交
4164 4165 4166 4167
		buf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4168 4169 4170
	*offp = off;
	free_page((unsigned long)p);
	return count;
L
Linus Torvalds 已提交
4171 4172 4173 4174 4175 4176 4177 4178
}

/*****************************************************************************/

/*
 *	Code to handle an "staliomem" write operation. This device is the 
 *	contents of the board shared memory. It is used for down loading
 *	the slave image (and debugging :-)
A
Alan Cox 已提交
4179 4180
 *
 *	FIXME: copy under lock
L
Linus Torvalds 已提交
4181 4182 4183 4184
 */

static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp)
{
A
Alan Cox 已提交
4185
	unsigned long flags;
4186
	void __iomem *memptr;
4187
	struct stlibrd *brdp;
A
Alan Cox 已提交
4188
	char __user *chbuf;
4189 4190
	unsigned int brdnr;
	int size, n;
A
Alan Cox 已提交
4191 4192
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4193

4194
	brdnr = iminor(fp->f_path.dentry->d_inode);
A
Alan Cox 已提交
4195

L
Linus Torvalds 已提交
4196
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4197
		return -ENODEV;
L
Linus Torvalds 已提交
4198
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4199 4200
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4201
	if (brdp->state == 0)
A
Alan Cox 已提交
4202 4203 4204
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4205 4206

	chbuf = (char __user *) buf;
4207
	size = min(count, (size_t)(brdp->memsize - off));
A
Alan Cox 已提交
4208 4209 4210 4211 4212 4213 4214 4215

	/*
	 *	Copy the data a page at a time
	 */

	p = (void *)__get_free_page(GFP_KERNEL);
	if(p == NULL)
		return -ENOMEM;
L
Linus Torvalds 已提交
4216 4217

	while (size > 0) {
4218 4219
		n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = min(n, (int)PAGE_SIZE);
A
Alan Cox 已提交
4220 4221 4222
		if (copy_from_user(p, chbuf, n)) {
			if (count == 0)
				count = -EFAULT;
L
Linus Torvalds 已提交
4223 4224
			goto out;
		}
A
Alan Cox 已提交
4225 4226
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
4227
		memptr = EBRDGETMEMPTR(brdp, off);
A
Alan Cox 已提交
4228 4229 4230 4231
		memcpy_toio(memptr, p, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		off += n;
L
Linus Torvalds 已提交
4232 4233 4234 4235
		chbuf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4236 4237 4238
	free_page((unsigned long) p);
	*offp = off;
	return count;
L
Linus Torvalds 已提交
4239 4240 4241 4242 4243 4244 4245 4246 4247 4248
}

/*****************************************************************************/

/*
 *	Return the board stats structure to user app.
 */

static int stli_getbrdstats(combrd_t __user *bp)
{
4249
	struct stlibrd *brdp;
4250
	unsigned int i;
L
Linus Torvalds 已提交
4251 4252 4253 4254

	if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t)))
		return -EFAULT;
	if (stli_brdstats.brd >= STL_MAXBRDS)
A
Alan Cox 已提交
4255
		return -ENODEV;
L
Linus Torvalds 已提交
4256
	brdp = stli_brds[stli_brdstats.brd];
A
Alan Cox 已提交
4257 4258
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276

	memset(&stli_brdstats, 0, sizeof(combrd_t));
	stli_brdstats.brd = brdp->brdnr;
	stli_brdstats.type = brdp->brdtype;
	stli_brdstats.hwid = 0;
	stli_brdstats.state = brdp->state;
	stli_brdstats.ioaddr = brdp->iobase;
	stli_brdstats.memaddr = brdp->memaddr;
	stli_brdstats.nrpanels = brdp->nrpanels;
	stli_brdstats.nrports = brdp->nrports;
	for (i = 0; (i < brdp->nrpanels); i++) {
		stli_brdstats.panels[i].panel = i;
		stli_brdstats.panels[i].hwid = brdp->panelids[i];
		stli_brdstats.panels[i].nrports = brdp->panels[i];
	}

	if (copy_to_user(bp, &stli_brdstats, sizeof(combrd_t)))
		return -EFAULT;
A
Alan Cox 已提交
4277
	return 0;
L
Linus Torvalds 已提交
4278 4279 4280 4281 4282 4283 4284 4285
}

/*****************************************************************************/

/*
 *	Resolve the referenced port number into a port struct pointer.
 */

4286 4287
static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr,
		unsigned int portnr)
L
Linus Torvalds 已提交
4288
{
4289
	struct stlibrd *brdp;
4290
	unsigned int i;
L
Linus Torvalds 已提交
4291

4292
	if (brdnr >= STL_MAXBRDS)
A
Alan Cox 已提交
4293
		return NULL;
L
Linus Torvalds 已提交
4294
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4295 4296
	if (brdp == NULL)
		return NULL;
L
Linus Torvalds 已提交
4297 4298
	for (i = 0; (i < panelnr); i++)
		portnr += brdp->panels[i];
4299
	if (portnr >= brdp->nrports)
A
Alan Cox 已提交
4300 4301
		return NULL;
	return brdp->ports[portnr];
L
Linus Torvalds 已提交
4302 4303 4304 4305 4306 4307 4308 4309 4310 4311
}

/*****************************************************************************/

/*
 *	Return the port stats structure to user app. A NULL port struct
 *	pointer passed in means that we need to find out from the app
 *	what port to get stats for (used through board control device).
 */

4312
static int stli_portcmdstats(struct stliport *portp)
L
Linus Torvalds 已提交
4313 4314
{
	unsigned long	flags;
4315
	struct stlibrd	*brdp;
L
Linus Torvalds 已提交
4316 4317 4318 4319
	int		rc;

	memset(&stli_comstats, 0, sizeof(comstats_t));

A
Alan Cox 已提交
4320 4321
	if (portp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4322
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
4323 4324
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4325 4326 4327 4328

	if (brdp->state & BST_STARTED) {
		if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS,
		    &stli_cdkstats, sizeof(asystats_t), 1)) < 0)
A
Alan Cox 已提交
4329
			return rc;
L
Linus Torvalds 已提交
4330 4331 4332 4333 4334 4335 4336 4337 4338 4339
	} else {
		memset(&stli_cdkstats, 0, sizeof(asystats_t));
	}

	stli_comstats.brd = portp->brdnr;
	stli_comstats.panel = portp->panelnr;
	stli_comstats.port = portp->portnr;
	stli_comstats.state = portp->state;
	stli_comstats.flags = portp->flags;

A
Alan Cox 已提交
4340 4341
	spin_lock_irqsave(&brd_lock, flags);
	if (portp->tty != NULL) {
L
Linus Torvalds 已提交
4342 4343
		if (portp->tty->driver_data == portp) {
			stli_comstats.ttystate = portp->tty->flags;
A
Alan Cox 已提交
4344 4345
			stli_comstats.rxbuffered = -1;
			if (portp->tty->termios != NULL) {
L
Linus Torvalds 已提交
4346 4347 4348 4349 4350 4351 4352
				stli_comstats.cflags = portp->tty->termios->c_cflag;
				stli_comstats.iflags = portp->tty->termios->c_iflag;
				stli_comstats.oflags = portp->tty->termios->c_oflag;
				stli_comstats.lflags = portp->tty->termios->c_lflag;
			}
		}
	}
A
Alan Cox 已提交
4353
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
4354 4355 4356 4357 4358 4359 4360 4361 4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374

	stli_comstats.txtotal = stli_cdkstats.txchars;
	stli_comstats.rxtotal = stli_cdkstats.rxchars + stli_cdkstats.ringover;
	stli_comstats.txbuffered = stli_cdkstats.txringq;
	stli_comstats.rxbuffered += stli_cdkstats.rxringq;
	stli_comstats.rxoverrun = stli_cdkstats.overruns;
	stli_comstats.rxparity = stli_cdkstats.parity;
	stli_comstats.rxframing = stli_cdkstats.framing;
	stli_comstats.rxlost = stli_cdkstats.ringover;
	stli_comstats.rxbreaks = stli_cdkstats.rxbreaks;
	stli_comstats.txbreaks = stli_cdkstats.txbreaks;
	stli_comstats.txxon = stli_cdkstats.txstart;
	stli_comstats.txxoff = stli_cdkstats.txstop;
	stli_comstats.rxxon = stli_cdkstats.rxstart;
	stli_comstats.rxxoff = stli_cdkstats.rxstop;
	stli_comstats.rxrtsoff = stli_cdkstats.rtscnt / 2;
	stli_comstats.rxrtson = stli_cdkstats.rtscnt - stli_comstats.rxrtsoff;
	stli_comstats.modem = stli_cdkstats.dcdcnt;
	stli_comstats.hwid = stli_cdkstats.hwid;
	stli_comstats.signals = stli_mktiocm(stli_cdkstats.signals);

A
Alan Cox 已提交
4375
	return 0;
L
Linus Torvalds 已提交
4376 4377 4378 4379 4380 4381 4382 4383 4384 4385
}

/*****************************************************************************/

/*
 *	Return the port stats structure to user app. A NULL port struct
 *	pointer passed in means that we need to find out from the app
 *	what port to get stats for (used through board control device).
 */

4386
static int stli_getportstats(struct stliport *portp, comstats_t __user *cp)
L
Linus Torvalds 已提交
4387
{
4388
	struct stlibrd *brdp;
A
Alan Cox 已提交
4389
	int rc;
L
Linus Torvalds 已提交
4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416

	if (!portp) {
		if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
			return -EFAULT;
		portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
			stli_comstats.port);
		if (!portp)
			return -ENODEV;
	}

	brdp = stli_brds[portp->brdnr];
	if (!brdp)
		return -ENODEV;

	if ((rc = stli_portcmdstats(portp)) < 0)
		return rc;

	return copy_to_user(cp, &stli_comstats, sizeof(comstats_t)) ?
			-EFAULT : 0;
}

/*****************************************************************************/

/*
 *	Clear the port stats structure. We also return it zeroed out...
 */

4417
static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp)
L
Linus Torvalds 已提交
4418
{
4419
	struct stlibrd *brdp;
A
Alan Cox 已提交
4420
	int rc;
L
Linus Torvalds 已提交
4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455

	if (!portp) {
		if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t)))
			return -EFAULT;
		portp = stli_getport(stli_comstats.brd, stli_comstats.panel,
			stli_comstats.port);
		if (!portp)
			return -ENODEV;
	}

	brdp = stli_brds[portp->brdnr];
	if (!brdp)
		return -ENODEV;

	if (brdp->state & BST_STARTED) {
		if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0)
			return rc;
	}

	memset(&stli_comstats, 0, sizeof(comstats_t));
	stli_comstats.brd = portp->brdnr;
	stli_comstats.panel = portp->panelnr;
	stli_comstats.port = portp->portnr;

	if (copy_to_user(cp, &stli_comstats, sizeof(comstats_t)))
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	Return the entire driver ports structure to a user app.
 */

4456
static int stli_getportstruct(struct stliport __user *arg)
L
Linus Torvalds 已提交
4457
{
4458
	struct stliport stli_dummyport;
4459
	struct stliport *portp;
L
Linus Torvalds 已提交
4460

4461
	if (copy_from_user(&stli_dummyport, arg, sizeof(struct stliport)))
L
Linus Torvalds 已提交
4462 4463 4464 4465 4466
		return -EFAULT;
	portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
		 stli_dummyport.portnr);
	if (!portp)
		return -ENODEV;
4467
	if (copy_to_user(arg, portp, sizeof(struct stliport)))
L
Linus Torvalds 已提交
4468 4469 4470 4471 4472 4473 4474 4475 4476 4477
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	Return the entire driver board structure to a user app.
 */

4478
static int stli_getbrdstruct(struct stlibrd __user *arg)
L
Linus Torvalds 已提交
4479
{
4480
	struct stlibrd stli_dummybrd;
4481
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
4482

4483
	if (copy_from_user(&stli_dummybrd, arg, sizeof(struct stlibrd)))
L
Linus Torvalds 已提交
4484
		return -EFAULT;
4485
	if (stli_dummybrd.brdnr >= STL_MAXBRDS)
L
Linus Torvalds 已提交
4486 4487 4488 4489
		return -ENODEV;
	brdp = stli_brds[stli_dummybrd.brdnr];
	if (!brdp)
		return -ENODEV;
4490
	if (copy_to_user(arg, brdp, sizeof(struct stlibrd)))
L
Linus Torvalds 已提交
4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504
		return -EFAULT;
	return 0;
}

/*****************************************************************************/

/*
 *	The "staliomem" device is also required to do some special operations on
 *	the board. We need to be able to send an interrupt to the board,
 *	reset it, and start/stop it.
 */

static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
{
4505
	struct stlibrd *brdp;
A
Alan Cox 已提交
4506
	int brdnr, rc, done;
L
Linus Torvalds 已提交
4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538
	void __user *argp = (void __user *)arg;

/*
 *	First up handle the board independent ioctls.
 */
	done = 0;
	rc = 0;

	switch (cmd) {
	case COM_GETPORTSTATS:
		rc = stli_getportstats(NULL, argp);
		done++;
		break;
	case COM_CLRPORTSTATS:
		rc = stli_clrportstats(NULL, argp);
		done++;
		break;
	case COM_GETBRDSTATS:
		rc = stli_getbrdstats(argp);
		done++;
		break;
	case COM_READPORT:
		rc = stli_getportstruct(argp);
		done++;
		break;
	case COM_READBOARD:
		rc = stli_getbrdstruct(argp);
		done++;
		break;
	}

	if (done)
A
Alan Cox 已提交
4539
		return rc;
L
Linus Torvalds 已提交
4540 4541 4542 4543 4544 4545 4546

/*
 *	Now handle the board specific ioctls. These all depend on the
 *	minor number of the device they were called from.
 */
	brdnr = iminor(ip);
	if (brdnr >= STL_MAXBRDS)
A
Alan Cox 已提交
4547
		return -ENODEV;
L
Linus Torvalds 已提交
4548 4549
	brdp = stli_brds[brdnr];
	if (!brdp)
A
Alan Cox 已提交
4550
		return -ENODEV;
L
Linus Torvalds 已提交
4551
	if (brdp->state == 0)
A
Alan Cox 已提交
4552
		return -ENODEV;
L
Linus Torvalds 已提交
4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575

	switch (cmd) {
	case STL_BINTR:
		EBRDINTR(brdp);
		break;
	case STL_BSTART:
		rc = stli_startbrd(brdp);
		break;
	case STL_BSTOP:
		brdp->state &= ~BST_STARTED;
		break;
	case STL_BRESET:
		brdp->state &= ~BST_STARTED;
		EBRDRESET(brdp);
		if (stli_shared == 0) {
			if (brdp->reenable != NULL)
				(* brdp->reenable)(brdp);
		}
		break;
	default:
		rc = -ENOIOCTLCMD;
		break;
	}
A
Alan Cox 已提交
4576
	return rc;
L
Linus Torvalds 已提交
4577 4578
}

J
Jeff Dike 已提交
4579
static const struct tty_operations stli_ops = {
L
Linus Torvalds 已提交
4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604
	.open = stli_open,
	.close = stli_close,
	.write = stli_write,
	.put_char = stli_putchar,
	.flush_chars = stli_flushchars,
	.write_room = stli_writeroom,
	.chars_in_buffer = stli_charsinbuffer,
	.ioctl = stli_ioctl,
	.set_termios = stli_settermios,
	.throttle = stli_throttle,
	.unthrottle = stli_unthrottle,
	.stop = stli_stop,
	.start = stli_start,
	.hangup = stli_hangup,
	.flush_buffer = stli_flushbuffer,
	.break_ctl = stli_breakctl,
	.wait_until_sent = stli_waituntilsent,
	.send_xchar = stli_sendxchar,
	.read_proc = stli_readproc,
	.tiocmget = stli_tiocmget,
	.tiocmset = stli_tiocmset,
};

/*****************************************************************************/

A
Adrian Bunk 已提交
4605
static int __init stli_init(void)
L
Linus Torvalds 已提交
4606 4607 4608 4609
{
	int i;
	printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);

A
Alan Cox 已提交
4610 4611 4612
	spin_lock_init(&stli_lock);
	spin_lock_init(&brd_lock);

L
Linus Torvalds 已提交
4613 4614 4615 4616 4617 4618 4619 4620 4621
	stli_initbrds();

	stli_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
	if (!stli_serial)
		return -ENOMEM;

/*
 *	Allocate a temporary write buffer.
 */
4622 4623
	stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
	if (!stli_txcookbuf)
L
Linus Torvalds 已提交
4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634
		printk(KERN_ERR "STALLION: failed to allocate memory "
				"(size=%d)\n", STLI_TXBUFSIZE);

/*
 *	Set up a character driver for the shared memory region. We need this
 *	to down load the slave code image. Also it is a useful debugging tool.
 */
	if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
		printk(KERN_ERR "STALLION: failed to register serial memory "
				"device\n");

4635
	istallion_class = class_create(THIS_MODULE, "staliomem");
4636
	for (i = 0; i < 4; i++)
4637 4638
		class_device_create(istallion_class, NULL,
				MKDEV(STL_SIOMEMMAJOR, i),
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				NULL, "staliomem%d", i);

/*
 *	Set up the tty driver structure and register us as a driver.
 */
	stli_serial->owner = THIS_MODULE;
	stli_serial->driver_name = stli_drvname;
	stli_serial->name = stli_serialname;
	stli_serial->major = STL_SERIALMAJOR;
	stli_serial->minor_start = 0;
	stli_serial->type = TTY_DRIVER_TYPE_SERIAL;
	stli_serial->subtype = SERIAL_TYPE_NORMAL;
	stli_serial->init_termios = stli_deftermios;
	stli_serial->flags = TTY_DRIVER_REAL_RAW;
	tty_set_operations(stli_serial, &stli_ops);

	if (tty_register_driver(stli_serial)) {
		put_tty_driver(stli_serial);
		printk(KERN_ERR "STALLION: failed to register serial driver\n");
		return -EBUSY;
	}
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	return 0;
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}

/*****************************************************************************/