istallion.c 124.8 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.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

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

#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 <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_BRUMBY8	5
#define	BRD_BRUMBY16	6
#define	BRD_ONBOARDE	7
#define	BRD_ONBOARD32	9
#define	BRD_ONBOARD2_32	10
#define	BRD_ONBOARDRS	11
#define	BRD_EASYIO	20
#define	BRD_ECH		21
#define	BRD_ECHMC	22
#define	BRD_ECP		23
#define BRD_ECPE	24
#define	BRD_ECPMC	25
#define	BRD_ECHPCI	26
#define	BRD_ECH64PCI	27
#define	BRD_EASYIOPCI	28
#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.
 */

typedef struct {
	int		brdtype;
	int		ioaddr1;
	int		ioaddr2;
	unsigned long	memaddr;
	int		irq;
	int		irqtype;
} stlconf_t;

static stlconf_t	stli_brdconf[] = {
	/*{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },*/
};

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static int	stli_nrbrds = ARRAY_SIZE(stli_brdconf);
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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.
 */
static struct termios		stli_deftermios = {
	.c_cflag	= (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
	.c_cc		= INIT_C_CC,
};

/*
 *	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;
static asystats_t	stli_cdkstats;
static stlibrd_t	stli_dummybrd;
static stliport_t	stli_dummyport;

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

static stlibrd_t	*stli_brds[STL_MAXBRDS];

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

/*
 *	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",
	(char *) NULL,
	"ONboard",
	"ONboard-MC",
	"ONboard-MC",
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	(char *) NULL,
	"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.
 */

typedef struct stlibrdtype {
	char	*name;
	int	type;
} stlibrdtype_t;

static stlibrdtype_t	stli_brdstr[] = {
	{ "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]");

/*
 *	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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/*
 *	Define the Stallion PCI vendor and device IDs.
 */
#ifdef CONFIG_PCI
#ifndef	PCI_VENDOR_ID_STALLION
#define	PCI_VENDOR_ID_STALLION		0x124d
#endif
#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);

#endif /* CONFIG_PCI */

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

/*
 *	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)

/*
 *	Define a baud rate table that converts termios baud rate selector
 *	into the actual baud rate value. All baud rate calculations are based
 *	on the actual baud rate required.
 */
static unsigned int	stli_baudrates[] = {
	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
	9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
};

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

/*
 *	Define some handy local macros...
 */
#undef MIN
#define	MIN(a,b)	(((a) <= (b)) ? (a) : (b))

#undef	TOLOWER
#define	TOLOWER(x)	((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))

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

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

static int	stli_parsebrd(stlconf_t *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);
static void	stli_settermios(struct tty_struct *tty, struct termios *old);
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);
static int	stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos);

static int	stli_brdinit(stlibrd_t *brdp);
static int	stli_startbrd(stlibrd_t *brdp);
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);
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static void	stli_brdpoll(stlibrd_t *brdp, cdkhdr_t __iomem *hdrp);
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static void	stli_poll(unsigned long arg);
static int	stli_hostcmd(stlibrd_t *brdp, stliport_t *portp);
static int	stli_initopen(stlibrd_t *brdp, stliport_t *portp);
static int	stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int	stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int	stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
static void	stli_dohangup(void *arg);
static int	stli_setport(stliport_t *portp);
static int	stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
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static void	__stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_dodelaycmd(stliport_t *portp, cdkctrl_t __iomem *cp);
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static void	stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
static void	stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
static long	stli_mktiocm(unsigned long sigvalue);
static void	stli_read(stlibrd_t *brdp, stliport_t *portp);
static int	stli_getserial(stliport_t *portp, struct serial_struct __user *sp);
static int	stli_setserial(stliport_t *portp, struct serial_struct __user *sp);
static int	stli_getbrdstats(combrd_t __user *bp);
static int	stli_getportstats(stliport_t *portp, comstats_t __user *cp);
static int	stli_portcmdstats(stliport_t *portp);
static int	stli_clrportstats(stliport_t *portp, comstats_t __user *cp);
static int	stli_getportstruct(stliport_t __user *arg);
static int	stli_getbrdstruct(stlibrd_t __user *arg);
static stlibrd_t *stli_allocbrd(void);

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

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

static stliport_t *stli_getport(int brdnr, int panelnr, int portnr);

static int	stli_initecp(stlibrd_t *brdp);
static int	stli_initonb(stlibrd_t *brdp);
static int	stli_eisamemprobe(stlibrd_t *brdp);
static int	stli_initports(stlibrd_t *brdp);

#ifdef	CONFIG_PCI
static int	stli_initpcibrd(int brdtype, struct pci_dev *devp);
#endif

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

/*
 *	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.
 */
static struct file_operations	stli_fsiomem = {
	.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...
 */
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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)

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

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static struct class *istallion_class;
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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)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	int		i, j;

	printk(KERN_INFO "Unloading %s: version %s\n", stli_drvtitle,
		stli_drvversion);

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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);
	if (i) {
		printk("STALLION: failed to un-register tty driver, "
			"errno=%d\n", -i);
		return;
	}
	put_tty_driver(stli_serial);
816
	for (i = 0; i < 4; i++)
817 818
		class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, i));
	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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	for (i = 0; (i < stli_nrbrds); i++) {
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		if ((brdp = stli_brds[i]) == NULL)
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			continue;
		for (j = 0; (j < STL_MAXPORTS); j++) {
			portp = brdp->ports[j];
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			if (portp != NULL) {
				if (portp->tty != NULL)
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					tty_hangup(portp->tty);
				kfree(portp);
			}
		}

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

module_init(istallion_module_init);
module_exit(istallion_module_exit);

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

/*
 *	Check for any arguments passed in on the module load command line.
 */

static void stli_argbrds(void)
{
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	stlconf_t conf;
	stlibrd_t *brdp;
	int i;
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	for (i = stli_nrbrds; i < ARRAY_SIZE(stli_brdsp); i++) {
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		memset(&conf, 0, sizeof(conf));
		if (stli_parsebrd(&conf, stli_brdsp[i]) == 0)
			continue;
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		if ((brdp = stli_allocbrd()) == NULL)
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			continue;
		stli_nrbrds = i + 1;
		brdp->brdnr = i;
		brdp->brdtype = conf.brdtype;
		brdp->iobase = conf.ioaddr1;
		brdp->memaddr = conf.memaddr;
		stli_brdinit(brdp);
	}
}

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

/*
 *	Convert an ascii string number into an unsigned long.
 */

static unsigned long stli_atol(char *str)
{
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	unsigned long val;
	int base, c;
	char *sp;
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	val = 0;
	sp = str;
	if ((*sp == '0') && (*(sp+1) == 'x')) {
		base = 16;
		sp += 2;
	} else if (*sp == '0') {
		base = 8;
		sp++;
	} else {
		base = 10;
	}

	for (; (*sp != 0); sp++) {
		c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
		if ((c < 0) || (c >= base)) {
			printk("STALLION: invalid argument %s\n", str);
			val = 0;
			break;
		}
		val = (val * base) + c;
	}
	return(val);
}

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

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

static int stli_parsebrd(stlconf_t *confp, char **argp)
{
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	char *sp;
	int i;
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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++)
		*sp = TOLOWER(*sp);

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	for (i = 0; i < ARRAY_SIZE(stli_brdstr); i++) {
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		if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
			break;
	}
932
	if (i == ARRAY_SIZE(stli_brdstr)) {
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		printk("STALLION: unknown board name, %s?\n", argp[0]);
934
		return 0;
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	}

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

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

static int stli_open(struct tty_struct *tty, struct file *filp)
{
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	stlibrd_t *brdp;
	stliport_t *portp;
	unsigned int minordev;
	int brdnr, portnr, 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);
	if ((portnr < 0) || (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)
{
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	stlibrd_t *brdp;
	stliport_t *portp;
	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.
 */

static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
{
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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)
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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)
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		return rc;
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	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.
 */

static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
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	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
	int rc;
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/*
 *	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.
 */
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	spin_lock_irqsave(&brd_lock, flags);
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	EBRDENABLE(brdp);
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	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 +
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		portp->portidx;
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	writeb(readb(bits) | portp->portbit, bits);
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	EBRDDISABLE(brdp);

	if (wait == 0) {
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		spin_unlock_irqrestore(&brd_lock, flags);
		return 0;
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	}

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

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	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;
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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).
 */

static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
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	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.
 */
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	spin_lock_irqsave(&brd_lock, flags);
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	EBRDENABLE(brdp);
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	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 +
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		portp->portidx;
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	writeb(readb(bits) |portp->portbit, bits);
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	EBRDDISABLE(brdp);

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

	if (wait == 0)
		return 0;
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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;
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	return rc;
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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).
 */

static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
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	if (signal_pending(current))
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		return -ERESTARTSYS;

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

	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
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	if (signal_pending(current))
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		return -ERESTARTSYS;

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

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

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

static int stli_setport(stliport_t *portp)
{
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	stlibrd_t *brdp;
	asyport_t aport;
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	if (portp == NULL)
		return -ENODEV;
	if (portp->tty == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 && portp->brdnr >= stli_nrbrds)
		return -ENODEV;
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	brdp = stli_brds[portp->brdnr];
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	if (brdp == NULL)
		return -ENODEV;
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	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...
 */

static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
{
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	unsigned long flags;
	int rc, doclocal;
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	rc = 0;
	doclocal = 0;

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

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	spin_lock_irqsave(&stli_lock, flags);
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	portp->openwaitcnt++;
	if (! tty_hung_up_p(filp))
		portp->refcount--;
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	spin_unlock_irqrestore(&stli_lock, flags);
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	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);
	}

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	spin_lock_irqsave(&stli_lock, flags);
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	if (! tty_hung_up_p(filp))
		portp->refcount++;
	portp->openwaitcnt--;
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	spin_unlock_irqrestore(&stli_lock, flags);
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	return rc;
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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)
{
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	cdkasy_t __iomem *ap;
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	unsigned char __iomem *shbuf;
	unsigned char *chbuf;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int len, stlen, head, tail, size;
	unsigned long flags;
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	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
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	if (portp == NULL)
		return 0;
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	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
A
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		return 0;
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	brdp = stli_brds[portp->brdnr];
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	if (brdp == NULL)
		return 0;
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	chbuf = (unsigned char *) buf;

/*
 *	All data is now local, shove as much as possible into shared memory.
 */
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	spin_lock_irqsave(&brd_lock, flags);
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	EBRDENABLE(brdp);
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	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);
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	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

	len = MIN(len, count);
	count = 0;
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	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset);
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	while (len > 0) {
		stlen = MIN(len, stlen);
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		memcpy_toio(shbuf + head, chbuf, stlen);
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		chbuf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

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	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
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	if (test_bit(ST_TXBUSY, &portp->state)) {
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		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
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	}
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	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
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		portp->portidx;
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	writeb(readb(bits) | portp->portbit, bits);
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	set_bit(ST_TXBUSY, &portp->state);
	EBRDDISABLE(brdp);
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	spin_unlock_irqrestore(&brd_lock, flags);
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	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) {
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		if (stli_txcooktty != NULL)
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			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)
{
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	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	cdkasy_t __iomem *ap;
	struct tty_struct *cooktty;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int len, stlen, head, tail, size, count, cooksize;
	unsigned char *buf;
	unsigned char __iomem *shbuf;
	unsigned long flags;
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	cooksize = stli_txcooksize;
	cooktty = stli_txcooktty;
	stli_txcooksize = 0;
	stli_txcookrealsize = 0;
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	stli_txcooktty = NULL;
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1541

A
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	if (tty == NULL)
L
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		return;
A
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	if (cooktty == NULL)
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		return;
	if (tty != cooktty)
		tty = cooktty;
	if (cooksize == 0)
		return;

	portp = tty->driver_data;
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	if (portp == NULL)
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		return;
	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
		return;
	brdp = stli_brds[portp->brdnr];
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	if (brdp == NULL)
L
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		return;

A
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	spin_lock_irqsave(&brd_lock, flags);
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	EBRDENABLE(brdp);

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	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);
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	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

	len = MIN(len, cooksize);
	count = 0;
	shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
	buf = stli_txcookbuf;

	while (len > 0) {
		stlen = MIN(len, stlen);
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Alan Cox 已提交
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		memcpy_toio(shbuf + head, buf, stlen);
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Linus Torvalds 已提交
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		buf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

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	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
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	if (test_bit(ST_TXBUSY, &portp->state)) {
A
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		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
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Linus Torvalds 已提交
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	}
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	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
Linus Torvalds 已提交
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		portp->portidx;
A
Alan Cox 已提交
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	writeb(readb(bits) | portp->portbit, bits);
L
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	set_bit(ST_TXBUSY, &portp->state);

	EBRDDISABLE(brdp);
A
Alan Cox 已提交
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	spin_unlock_irqrestore(&brd_lock, flags);
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}

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

static int stli_writeroom(struct tty_struct *tty)
{
A
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1616 1617 1618 1619 1620
	cdkasyrq_t __iomem *rp;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int head, tail, len;
	unsigned long flags;
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	if (tty == stli_txcooktty) {
		if (stli_txcookrealsize != 0) {
			len = stli_txcookrealsize - stli_txcooksize;
A
Alan Cox 已提交
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			return len;
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1626 1627 1628 1629
		}
	}

	portp = tty->driver_data;
A
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1630 1631
	if (portp == NULL)
		return 0;
L
Linus Torvalds 已提交
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	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
A
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1633
		return 0;
L
Linus Torvalds 已提交
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	brdp = stli_brds[portp->brdnr];
A
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1635 1636
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1637

A
Alan Cox 已提交
1638
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1639
	EBRDENABLE(brdp);
A
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1640 1641 1642 1643 1644
	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);
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	len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
	len--;
	EBRDDISABLE(brdp);
A
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1648
	spin_unlock_irqrestore(&brd_lock, flags);
L
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	if (tty == stli_txcooktty) {
		stli_txcookrealsize = len;
		len -= stli_txcooksize;
	}
A
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	return len;
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}

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

/*
 *	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
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1669 1670 1671 1672 1673
	cdkasyrq_t __iomem *rp;
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int head, tail, len;
	unsigned long flags;
L
Linus Torvalds 已提交
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	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
A
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1678 1679
	if (portp == NULL)
		return 0;
L
Linus Torvalds 已提交
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	if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
A
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		return 0;
L
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	brdp = stli_brds[portp->brdnr];
A
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	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1685

A
Alan Cox 已提交
1686
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
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	EBRDENABLE(brdp);
A
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	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);
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	len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
	if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
		len = 1;
	EBRDDISABLE(brdp);
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	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
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A
Alan Cox 已提交
1699
	return len;
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}

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

/*
 *	Generate the serial struct info.
 */

static int stli_getserial(stliport_t *portp, struct serial_struct __user *sp)
{
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	struct serial_struct sio;
	stlibrd_t *brdp;
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	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];
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Alan Cox 已提交
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	if (brdp != NULL)
L
Linus Torvalds 已提交
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		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.
 */

static int stli_setserial(stliport_t *portp, struct serial_struct __user *sp)
{
A
Alan Cox 已提交
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	struct serial_struct sio;
	int rc;
L
Linus Torvalds 已提交
1745 1746 1747 1748 1749 1750 1751 1752

	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
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			return -EPERM;
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	} 

	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)
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		return rc;
	return 0;
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}

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

static int stli_tiocmget(struct tty_struct *tty, struct file *file)
{
	stliport_t *portp = tty->driver_data;
	stlibrd_t *brdp;
	int rc;

A
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	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
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Linus Torvalds 已提交
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	brdp = stli_brds[portp->brdnr];
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1781 1782
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
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	if (tty->flags & (1 << TTY_IO_ERROR))
A
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1784
		return -EIO;
L
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	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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	return stli_mktiocm(portp->asig.sigvalue);
}

static int stli_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear)
{
	stliport_t *portp = tty->driver_data;
	stlibrd_t *brdp;
	int rts = -1, dtr = -1;

A
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1800 1801 1802 1803
	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
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Linus Torvalds 已提交
1804
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1805 1806
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1807
	if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1808
		return -EIO;
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	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)
{
A
Alan Cox 已提交
1827 1828 1829 1830
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned int ival;
	int rc;
L
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1831 1832 1833
	void __user *argp = (void __user *)arg;

	portp = tty->driver_data;
A
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1834 1835 1836 1837
	if (portp == NULL)
		return -ENODEV;
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
		return 0;
L
Linus Torvalds 已提交
1838
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1839 1840
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1841 1842 1843 1844

	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
 	    (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
		if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1845
			return -EIO;
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Linus Torvalds 已提交
1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891
	}

	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
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	return rc;
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1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903
}

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

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

static void stli_settermios(struct tty_struct *tty, struct termios *old)
{
A
Alan Cox 已提交
1904 1905 1906 1907
	stliport_t *portp;
	stlibrd_t *brdp;
	struct termios *tiosp;
	asyport_t aport;
L
Linus Torvalds 已提交
1908

A
Alan Cox 已提交
1909
	if (tty == NULL)
L
Linus Torvalds 已提交
1910 1911
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
1912
	if (portp == NULL)
L
Linus Torvalds 已提交
1913
		return;
A
Alan Cox 已提交
1914
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1915 1916
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1917
	if (brdp == NULL)
L
Linus Torvalds 已提交
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
		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)
{
A
Alan Cox 已提交
1950 1951
	stliport_t	*portp = tty->driver_data;
	if (portp == NULL)
L
Linus Torvalds 已提交
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
		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)
{
A
Alan Cox 已提交
1966 1967
	stliport_t	*portp = tty->driver_data;
	if (portp == NULL)
L
Linus Torvalds 已提交
1968 1969 1970 1971 1972 1973 1974
		return;
	clear_bit(ST_RXSTOP, &portp->state);
}

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

/*
A
Alan Cox 已提交
1975
 *	Stop the transmitter.
L
Linus Torvalds 已提交
1976 1977 1978 1979 1980 1981 1982 1983 1984
 */

static void stli_stop(struct tty_struct *tty)
{
}

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

/*
A
Alan Cox 已提交
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 *	Start the transmitter again.
L
Linus Torvalds 已提交
1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
 */

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).
 */

static void stli_dohangup(void *arg)
{
A
Alan Cox 已提交
2005 2006 2007
	stliport_t *portp = (stliport_t *) arg;
	if (portp->tty != NULL) {
		tty_hangup(portp->tty);
L
Linus Torvalds 已提交
2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
	}
}

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

/*
 *	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)
{
A
Alan Cox 已提交
2022 2023 2024
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned long flags;
L
Linus Torvalds 已提交
2025 2026

	portp = tty->driver_data;
A
Alan Cox 已提交
2027
	if (portp == NULL)
L
Linus Torvalds 已提交
2028
		return;
A
Alan Cox 已提交
2029
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2030 2031
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2032
	if (brdp == NULL)
L
Linus Torvalds 已提交
2033 2034 2035 2036
		return;

	portp->flags &= ~ASYNC_INITIALIZED;

A
Alan Cox 已提交
2037
	if (!test_bit(ST_CLOSING, &portp->state))
L
Linus Torvalds 已提交
2038
		stli_rawclose(brdp, portp, 0, 0);
A
Alan Cox 已提交
2039 2040

	spin_lock_irqsave(&stli_lock, flags);
L
Linus Torvalds 已提交
2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055
	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
2056
	portp->tty = NULL;
L
Linus Torvalds 已提交
2057 2058
	portp->flags &= ~ASYNC_NORMAL_ACTIVE;
	portp->refcount = 0;
A
Alan Cox 已提交
2059 2060
	spin_unlock_irqrestore(&stli_lock, flags);

L
Linus Torvalds 已提交
2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
	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)
{
A
Alan Cox 已提交
2075 2076 2077
	stliport_t *portp;
	stlibrd_t *brdp;
	unsigned long ftype, flags;
L
Linus Torvalds 已提交
2078 2079

	portp = tty->driver_data;
A
Alan Cox 已提交
2080
	if (portp == NULL)
L
Linus Torvalds 已提交
2081
		return;
A
Alan Cox 已提交
2082
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2083 2084
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2085
	if (brdp == NULL)
L
Linus Torvalds 已提交
2086 2087
		return;

A
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2088
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
2089
	if (tty == stli_txcooktty) {
A
Alan Cox 已提交
2090
		stli_txcooktty = NULL;
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Linus Torvalds 已提交
2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101
		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);
		}
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2102
		__stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(u32), 0);
L
Linus Torvalds 已提交
2103
	}
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Alan Cox 已提交
2104 2105
	spin_unlock_irqrestore(&brd_lock, flags);
	tty_wakeup(tty);
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2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116
}

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

static void stli_breakctl(struct tty_struct *tty, int state)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	long		arg;

	portp = tty->driver_data;
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	if (portp == NULL)
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Linus Torvalds 已提交
2118
		return;
A
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2119
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2120 2121
		return;
	brdp = stli_brds[portp->brdnr];
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2122
	if (brdp == NULL)
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Linus Torvalds 已提交
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132
		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)
{
A
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2133 2134
	stliport_t *portp;
	unsigned long tend;
L
Linus Torvalds 已提交
2135

A
Alan Cox 已提交
2136
	if (tty == NULL)
L
Linus Torvalds 已提交
2137 2138
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
2139
	if (portp == NULL)
L
Linus Torvalds 已提交
2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
		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)
{
	stlibrd_t	*brdp;
	stliport_t	*portp;
	asyctrl_t	actrl;

	portp = tty->driver_data;
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2164
	if (portp == NULL)
L
Linus Torvalds 已提交
2165
		return;
A
Alan Cox 已提交
2166
	if (portp->brdnr < 0 || portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
2167 2168
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2169
	if (brdp == NULL)
L
Linus Torvalds 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
		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).
 */

static int stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos)
{
A
Alan Cox 已提交
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	char *sp, *uart;
	int rc, cnt;
L
Linus Torvalds 已提交
2198 2199 2200 2201 2202 2203

	rc = stli_portcmdstats(portp);

	uart = "UNKNOWN";
	if (brdp->state & BST_STARTED) {
		switch (stli_comstats.hwid) {
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		case 0:	uart = "2681"; break;
		case 1:	uart = "SC26198"; break;
		default:uart = "CD1400"; break;
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2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256
		}
	}

	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)
{
A
Alan Cox 已提交
2257 2258 2259 2260 2261
	stlibrd_t *brdp;
	stliport_t *portp;
	int brdnr, portnr, totalport;
	int curoff, maxoff;
	char *pos;
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Linus Torvalds 已提交
2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281

	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];
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2282
		if (brdp == NULL)
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Linus Torvalds 已提交
2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296
			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
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2297
			if (portp == NULL)
L
Linus Torvalds 已提交
2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323
				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
2324 2325 2326
 *
 *	The caller must hold the brd_lock (see also stli_sendcmd the usual
 *	entry point)
L
Linus Torvalds 已提交
2327 2328
 */

A
Alan Cox 已提交
2329
static void __stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
L
Linus Torvalds 已提交
2330
{
A
Alan Cox 已提交
2331 2332 2333 2334
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
L
Linus Torvalds 已提交
2335

A
Alan Cox 已提交
2336
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
2337 2338 2339 2340

	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
2341
		spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
2342 2343 2344 2345
		return;
	}

	EBRDENABLE(brdp);
A
Alan Cox 已提交
2346
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
L
Linus Torvalds 已提交
2347
	if (size > 0) {
A
Alan Cox 已提交
2348
		memcpy_toio((void __iomem *) &(cp->args[0]), arg, size);
L
Linus Torvalds 已提交
2349 2350 2351 2352 2353
		if (copyback) {
			portp->argp = arg;
			portp->argsize = size;
		}
	}
A
Alan Cox 已提交
2354 2355 2356 2357
	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
2358
		portp->portidx;
A
Alan Cox 已提交
2359
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
2360 2361
	set_bit(ST_CMDING, &portp->state);
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371
	spin_unlock_irqrestore(&brd_lock, flags);
}

static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
	unsigned long		flags;

	spin_lock_irqsave(&brd_lock, flags);
	__stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
	spin_unlock_irqrestore(&brd_lock, flags);
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Linus Torvalds 已提交
2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385
}

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

/*
 *	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.
 */

static void stli_read(stlibrd_t *brdp, stliport_t *portp)
{
A
Alan Cox 已提交
2386 2387
	cdkasyrq_t __iomem *rp;
	char __iomem *shbuf;
L
Linus Torvalds 已提交
2388
	struct tty_struct	*tty;
A
Alan Cox 已提交
2389 2390
	unsigned int head, tail, size;
	unsigned int len, stlen;
L
Linus Torvalds 已提交
2391 2392 2393 2394

	if (test_bit(ST_RXSTOP, &portp->state))
		return;
	tty = portp->tty;
A
Alan Cox 已提交
2395
	if (tty == NULL)
L
Linus Torvalds 已提交
2396 2397
		return;

A
Alan Cox 已提交
2398 2399 2400 2401 2402
	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
2403 2404 2405 2406 2407 2408 2409 2410 2411
	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
2412
	len = tty_buffer_request_room(tty, len);
A
Alan Cox 已提交
2413 2414

	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset);
L
Linus Torvalds 已提交
2415 2416

	while (len > 0) {
A
Alan Cox 已提交
2417 2418
		unsigned char *cptr;

L
Linus Torvalds 已提交
2419
		stlen = MIN(len, stlen);
A
Alan Cox 已提交
2420 2421
		tty_prepare_flip_string(tty, &cptr, stlen);
		memcpy_fromio(cptr, shbuf + tail, stlen);
L
Linus Torvalds 已提交
2422 2423 2424 2425 2426 2427 2428
		len -= stlen;
		tail += stlen;
		if (tail >= size) {
			tail = 0;
			stlen = head;
		}
	}
A
Alan Cox 已提交
2429 2430
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	writew(tail, &rp->tail);
L
Linus Torvalds 已提交
2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445

	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.
 */

A
Alan Cox 已提交
2446
static void stli_dodelaycmd(stliport_t *portp, cdkctrl_t __iomem *cp)
L
Linus Torvalds 已提交
2447
{
A
Alan Cox 已提交
2448
	int cmd;
L
Linus Torvalds 已提交
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462

	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
2463
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig,
L
Linus Torvalds 已提交
2464
			sizeof(asysigs_t));
A
Alan Cox 已提交
2465 2466
		writel(0, &cp->status);
		writel(cmd, &cp->cmd);
L
Linus Torvalds 已提交
2467 2468 2469 2470 2471 2472 2473
		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
2474 2475 2476
		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
2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495
		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.
 */

static int stli_hostcmd(stlibrd_t *brdp, stliport_t *portp)
{
A
Alan Cox 已提交
2496 2497 2498 2499 2500 2501 2502 2503
	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
2504 2505 2506 2507 2508 2509
	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
2510 2511
		rc = readl(&cp->openarg);
		if (readb(&cp->open) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2512 2513
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2514
			writel(0, &cp->openarg);
L
Linus Torvalds 已提交
2515 2516 2517 2518 2519 2520 2521 2522 2523 2524
			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
2525 2526
		rc = (int) readl(&cp->closearg);
		if (readb(&cp->close) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2527 2528
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2529
			writel(0, &cp->closearg);
L
Linus Torvalds 已提交
2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540
			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
2541 2542
		rc = readl(&cp->status);
		if (readl(&cp->cmd) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2543 2544
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2545 2546
			if (portp->argp != NULL) {
				memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]),
L
Linus Torvalds 已提交
2547
					portp->argsize);
A
Alan Cox 已提交
2548
				portp->argp = NULL;
L
Linus Torvalds 已提交
2549
			}
A
Alan Cox 已提交
2550
			writel(0, &cp->status);
L
Linus Torvalds 已提交
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588
			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)) {
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			if (tty != NULL) {
				tty_wakeup(tty);
				EBRDENABLE(brdp);
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				wake_up_interruptible(&tty->write_wait);
			}
		}

		if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
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			if (tty != NULL) {
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				tty_insert_flip_char(tty, 0, TTY_BREAK);
				if (portp->flags & ASYNC_SAK) {
					do_SAK(tty);
					EBRDENABLE(brdp);
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				}
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				tty_schedule_flip(tty);
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			}
		}

		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.
 */

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static void stli_brdpoll(stlibrd_t *brdp, cdkhdr_t __iomem *hdrp)
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{
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	stliport_t *portp;
	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;
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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.
 */
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	memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset),
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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;
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		for (bitpos = 0; (bitpos < bitsize); bitpos++) {
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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)
{
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	cdkhdr_t __iomem *hdrp;
	stlibrd_t *brdp;
	int brdnr;
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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];
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		if (brdp == NULL)
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			continue;
		if ((brdp->state & BST_STARTED) == 0)
			continue;

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

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

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

static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp)
{
	memset(pp, 0, sizeof(asyport_t));

/*
 *	Start of by setting the baud, char size, parity and stop bit info.
 */
	pp->baudout = tiosp->c_cflag & CBAUD;
	if (pp->baudout & CBAUDEX) {
		pp->baudout &= ~CBAUDEX;
		if ((pp->baudout < 1) || (pp->baudout > 4))
			tiosp->c_cflag &= ~CBAUDEX;
		else
			pp->baudout += 15;
	}
	pp->baudout = stli_baudrates[pp->baudout];
	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;
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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.
 */

static int stli_initports(stlibrd_t *brdp)
{
	stliport_t	*portp;
	int		i, panelnr, panelport;

	for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2906 2907
		portp = kzalloc(sizeof(stliport_t), GFP_KERNEL);
		if (!portp) {
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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;
		INIT_WORK(&portp->tqhangup, stli_dohangup, portp);
		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;
	}

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	return 0;
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}

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

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

static void stli_ecpinit(stlibrd_t *brdp)
{
	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));
}

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

static void stli_ecpenable(stlibrd_t *brdp)
{	
	outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
}

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

static void stli_ecpdisable(stlibrd_t *brdp)
{	
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
}

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

static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
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	void *ptr;
	unsigned char val;
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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);
}

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

static void stli_ecpreset(stlibrd_t *brdp)
{	
	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(500);
}

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

static void stli_ecpintr(stlibrd_t *brdp)
{	
	outb(0x1, brdp->iobase);
}

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

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

static void stli_ecpeiinit(stlibrd_t *brdp)
{
	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));
}

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

static void stli_ecpeienable(stlibrd_t *brdp)
{	
	outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
}

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

static void stli_ecpeidisable(stlibrd_t *brdp)
{	
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
}

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

static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void		*ptr;
	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);
}

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

static void stli_ecpeireset(stlibrd_t *brdp)
{	
	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.
 */

static void stli_ecpmcenable(stlibrd_t *brdp)
{	
	outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
}

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

static void stli_ecpmcdisable(stlibrd_t *brdp)
{	
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
}

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

static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
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	void *ptr;
	unsigned char val;
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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_MCPAGESIZE);
		val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
	}
	outb(val, (brdp->iobase + ECP_MCCONFR));
	return(ptr);
}

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

static void stli_ecpmcreset(stlibrd_t *brdp)
{	
	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.
 */

static void stli_ecppciinit(stlibrd_t *brdp)
{
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

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

static char *stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void		*ptr;
	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);
}

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

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

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

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

static void stli_onbinit(stlibrd_t *brdp)
{
	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);
}

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

static void stli_onbenable(stlibrd_t *brdp)
{	
	outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
}

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

static void stli_onbdisable(stlibrd_t *brdp)
{	
	outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
}

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

static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
	void	*ptr;

	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);
}

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

static void stli_onbreset(stlibrd_t *brdp)
{	
	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.
 */

static void stli_onbeinit(stlibrd_t *brdp)
{
	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);
}

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

static void stli_onbeenable(stlibrd_t *brdp)
{	
	outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
}

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

static void stli_onbedisable(stlibrd_t *brdp)
{	
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
}

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

static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
A
Alan Cox 已提交
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	void *ptr;
	unsigned char val;
L
Linus Torvalds 已提交
3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 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

	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);
}

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

static void stli_onbereset(stlibrd_t *brdp)
{	
	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.
 */

static void stli_bbyinit(stlibrd_t *brdp)
{
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
	outb(0x1, brdp->iobase);
	mdelay(1);
}

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

static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
A
Alan Cox 已提交
3323 3324
	void *ptr;
	unsigned char val;
L
Linus Torvalds 已提交
3325

A
Alan Cox 已提交
3326
	BUG_ON(offset > brdp->memsize);
L
Linus Torvalds 已提交
3327

A
Alan Cox 已提交
3328 3329
	ptr = brdp->membase + (offset % BBY_PAGESIZE);
	val = (unsigned char) (offset / BBY_PAGESIZE);
L
Linus Torvalds 已提交
3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359
	outb(val, (brdp->iobase + BBY_ATCONFR));
	return(ptr);
}

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

static void stli_bbyreset(stlibrd_t *brdp)
{	
	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.
 */

static void stli_stalinit(stlibrd_t *brdp)
{
	outb(0x1, brdp->iobase);
	mdelay(1000);
}

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

static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
{	
A
Alan Cox 已提交
3360 3361
	BUG_ON(offset > brdp->memsize);
	return brdp->membase + (offset % STAL_PAGESIZE);
L
Linus Torvalds 已提交
3362 3363 3364 3365 3366 3367
}

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

static void stli_stalreset(stlibrd_t *brdp)
{	
A
Alan Cox 已提交
3368
	u32 __iomem *vecp;
L
Linus Torvalds 已提交
3369

A
Alan Cox 已提交
3370 3371
	vecp = (u32 __iomem *) (brdp->membase + 0x30);
	writel(0xffff0000, vecp);
L
Linus Torvalds 已提交
3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384
	outb(0, brdp->iobase);
	mdelay(1000);
}

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

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

static int stli_initecp(stlibrd_t *brdp)
{
A
Alan Cox 已提交
3385 3386 3387 3388 3389
	cdkecpsig_t sig;
	cdkecpsig_t __iomem *sigsp;
	unsigned int status, nxtid;
	char *name;
	int panelnr, nrports;
L
Linus Torvalds 已提交
3390 3391 3392 3393 3394 3395 3396

	if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
		return -EIO;
	
	if ((brdp->iobase == 0) || (brdp->memaddr == 0))
	{
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3397
		return -ENODEV;
L
Linus Torvalds 已提交
3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 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
	}

	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->membase = (void *) brdp->memaddr;
		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->membase = (void *) brdp->memaddr;
		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->membase = (void *) brdp->memaddr;
		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->membase = (void *) brdp->memaddr;
		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:
		release_region(brdp->iobase, brdp->iosize);
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Alan Cox 已提交
3466
		return -EINVAL;
L
Linus Torvalds 已提交
3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477
	}

/*
 *	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);
A
Alan Cox 已提交
3478
	if (brdp->membase == NULL)
L
Linus Torvalds 已提交
3479 3480
	{
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3481
		return -ENOMEM;
L
Linus Torvalds 已提交
3482 3483 3484 3485 3486 3487 3488 3489
	}

/*
 *	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
3490
	sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
L
Linus Torvalds 已提交
3491 3492 3493
	memcpy(&sig, sigsp, sizeof(cdkecpsig_t));
	EBRDDISABLE(brdp);

A
Alan Cox 已提交
3494
	if (sig.magic != cpu_to_le32(ECP_MAGIC))
L
Linus Torvalds 已提交
3495 3496
	{
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3497
		return -ENODEV;
L
Linus Torvalds 已提交
3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520
	}

/*
 *	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
3521
	return 0;
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Linus Torvalds 已提交
3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532
}

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

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

static int stli_initonb(stlibrd_t *brdp)
{
A
Alan Cox 已提交
3533 3534 3535 3536
	cdkonbsig_t sig;
	cdkonbsig_t __iomem *sigsp;
	char *name;
	int i;
L
Linus Torvalds 已提交
3537 3538 3539 3540

/*
 *	Do a basic sanity check on the IO and memory addresses.
 */
A
Alan Cox 已提交
3541 3542
	if (brdp->iobase == 0 || brdp->memaddr == 0)
		return -ENODEV;
L
Linus Torvalds 已提交
3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618

	brdp->iosize = ONB_IOSIZE;
	
	if (!request_region(brdp->iobase, brdp->iosize, "istallion"))
		return -EIO;

/*
 *	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_ONBOARD32:
	case BRD_ONBOARD2:
	case BRD_ONBOARD2_32:
	case BRD_ONBOARDRS:
		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:
	case BRD_BRUMBY8:
	case BRD_BRUMBY16:
		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:
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3619
		return -EINVAL;
L
Linus Torvalds 已提交
3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630
	}

/*
 *	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);
A
Alan Cox 已提交
3631
	if (brdp->membase == NULL)
L
Linus Torvalds 已提交
3632 3633
	{
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3634
		return -ENOMEM;
L
Linus Torvalds 已提交
3635 3636 3637 3638 3639 3640 3641 3642
	}

/*
 *	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
3643 3644
	sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
	memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t));
L
Linus Torvalds 已提交
3645 3646
	EBRDDISABLE(brdp);

A
Alan Cox 已提交
3647 3648 3649 3650
	if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
	    sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
	    sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
	    sig.magic3 != cpu_to_le16(ONB_MAGIC3))
L
Linus Torvalds 已提交
3651 3652
	{
		release_region(brdp->iobase, brdp->iosize);
A
Alan Cox 已提交
3653
		return -ENODEV;
L
Linus Torvalds 已提交
3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673
	}

/*
 *	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
3674
	return 0;
L
Linus Torvalds 已提交
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686
}

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

/*
 *	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...
 */

static int stli_startbrd(stlibrd_t *brdp)
{
A
Alan Cox 已提交
3687 3688 3689 3690 3691 3692 3693 3694 3695
	cdkhdr_t __iomem *hdrp;
	cdkmem_t __iomem *memp;
	cdkasy_t __iomem *ap;
	unsigned long flags;
	stliport_t *portp;
	int portnr, nrdevs, i, rc = 0;
	u32 memoff;

	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
3696
	EBRDENABLE(brdp);
A
Alan Cox 已提交
3697
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
L
Linus Torvalds 已提交
3698 3699 3700 3701 3702
	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
3703 3704 3705
		 __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
3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716
#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
3717 3718
	memoff = readl(&hdrp->memp);
	if (memoff > brdp->memsize) {
L
Linus Torvalds 已提交
3719 3720 3721 3722
		printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
		rc = -EIO;
		goto stli_donestartup;
	}
A
Alan Cox 已提交
3723 3724
	memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
	if (readw(&memp->dtype) != TYP_ASYNCTRL) {
L
Linus Torvalds 已提交
3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735
		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
3736
		if (readw(&memp->dtype) != TYP_ASYNC)
L
Linus Torvalds 已提交
3737 3738
			break;
		portp = brdp->ports[portnr];
A
Alan Cox 已提交
3739
		if (portp == NULL)
L
Linus Torvalds 已提交
3740 3741
			break;
		portp->devnr = i;
A
Alan Cox 已提交
3742
		portp->addr = readl(&memp->offset);
L
Linus Torvalds 已提交
3743 3744 3745 3746 3747
		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
3748
	writeb(0xff, &hdrp->slavereq);
L
Linus Torvalds 已提交
3749 3750 3751 3752 3753 3754 3755 3756

/*
 *	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
3757
		if (portp == NULL)
L
Linus Torvalds 已提交
3758 3759 3760
			break;
		if (portp->addr == 0)
			break;
A
Alan Cox 已提交
3761 3762 3763 3764 3765 3766
		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
3767 3768 3769 3770 3771
		}
	}

stli_donestartup:
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
3772
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
3773 3774 3775 3776 3777 3778 3779 3780 3781 3782

	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
3783
	return rc;
L
Linus Torvalds 已提交
3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820
}

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

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

static int __init stli_brdinit(stlibrd_t *brdp)
{
	stli_brds[brdp->brdnr] = brdp;

	switch (brdp->brdtype) {
	case BRD_ECP:
	case BRD_ECPE:
	case BRD_ECPMC:
	case BRD_ECPPCI:
		stli_initecp(brdp);
		break;
	case BRD_ONBOARD:
	case BRD_ONBOARDE:
	case BRD_ONBOARD2:
	case BRD_ONBOARD32:
	case BRD_ONBOARD2_32:
	case BRD_ONBOARDRS:
	case BRD_BRUMBY4:
	case BRD_BRUMBY8:
	case BRD_BRUMBY16:
	case BRD_STALLION:
		stli_initonb(brdp);
		break;
	case BRD_EASYIO:
	case BRD_ECH:
	case BRD_ECHMC:
	case BRD_ECHPCI:
		printk(KERN_ERR "STALLION: %s board type not supported in "
				"this driver\n", stli_brdnames[brdp->brdtype]);
A
Alan Cox 已提交
3821
		return -ENODEV;
L
Linus Torvalds 已提交
3822 3823 3824
	default:
		printk(KERN_ERR "STALLION: board=%d is unknown board "
				"type=%d\n", brdp->brdnr, brdp->brdtype);
A
Alan Cox 已提交
3825
		return -ENODEV;
L
Linus Torvalds 已提交
3826 3827 3828 3829 3830 3831 3832
	}

	if ((brdp->state & BST_FOUND) == 0) {
		printk(KERN_ERR "STALLION: %s board not found, board=%d "
				"io=%x mem=%x\n",
			stli_brdnames[brdp->brdtype], brdp->brdnr,
			brdp->iobase, (int) brdp->memaddr);
A
Alan Cox 已提交
3833
		return -ENODEV;
L
Linus Torvalds 已提交
3834 3835 3836 3837 3838 3839 3840
	}

	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
3841
	return 0;
L
Linus Torvalds 已提交
3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852
}

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

/*
 *	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.
 */

static int stli_eisamemprobe(stlibrd_t *brdp)
{
A
Alan Cox 已提交
3853 3854
	cdkecpsig_t	ecpsig, __iomem *ecpsigp;
	cdkonbsig_t	onbsig, __iomem *onbsigp;
L
Linus Torvalds 已提交
3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879
	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
3880
		return -ENODEV;
L
Linus Torvalds 已提交
3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892
	}

	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
3893
		if (brdp->membase == NULL)
L
Linus Torvalds 已提交
3894 3895 3896
			continue;

		if (brdp->brdtype == BRD_ECPE) {
A
Alan Cox 已提交
3897
			ecpsigp = (cdkecpsig_t __iomem *) stli_ecpeigetmemptr(brdp,
L
Linus Torvalds 已提交
3898
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3899 3900
			memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
			if (ecpsig.magic == cpu_to_le32(ECP_MAGIC))
L
Linus Torvalds 已提交
3901 3902
				foundit = 1;
		} else {
A
Alan Cox 已提交
3903
			onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp,
L
Linus Torvalds 已提交
3904
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3905 3906 3907 3908 3909
			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
3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932
				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
3933
		return -ENODEV;
L
Linus Torvalds 已提交
3934
	}
A
Alan Cox 已提交
3935
	return 0;
L
Linus Torvalds 已提交
3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965
}

static int stli_getbrdnr(void)
{
	int i;

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

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

/*
 *	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)
{
A
Alan Cox 已提交
3966 3967 3968
	stlibrd_t *brdp;
	unsigned int iobase, eid;
	int i;
L
Linus Torvalds 已提交
3969 3970

/*
A
Alan Cox 已提交
3971
 *	Firstly check if this is an EISA system.  If this is not an EISA system then
L
Linus Torvalds 已提交
3972 3973
 *	don't bother going any further!
 */
A
Alan Cox 已提交
3974 3975
	if (EISA_bus)
		return 0;
L
Linus Torvalds 已提交
3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992

/*
 *	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
3993
			if (brdp == NULL)
L
Linus Torvalds 已提交
3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004
				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
4005 4006
		if ((brdp = stli_allocbrd()) == NULL)
			return -ENOMEM;
L
Linus Torvalds 已提交
4007
		if ((brdp->brdnr = stli_getbrdnr()) < 0)
A
Alan Cox 已提交
4008
			return -ENOMEM;
L
Linus Torvalds 已提交
4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022
		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));
		stli_brdinit(brdp);
	}

A
Alan Cox 已提交
4023
	return 0;
L
Linus Torvalds 已提交
4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043
}

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

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

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

#ifdef	CONFIG_PCI

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

static int stli_initpcibrd(int brdtype, struct pci_dev *devp)
{
A
Alan Cox 已提交
4044
	stlibrd_t *brdp;
L
Linus Torvalds 已提交
4045 4046

	if (pci_enable_device(devp))
A
Alan Cox 已提交
4047 4048 4049
		return -EIO;
	if ((brdp = stli_allocbrd()) == NULL)
		return -ENOMEM;
L
Linus Torvalds 已提交
4050 4051 4052
	if ((brdp->brdnr = stli_getbrdnr()) < 0) {
		printk(KERN_INFO "STALLION: too many boards found, "
			"maximum supported %d\n", STL_MAXBRDS);
A
Alan Cox 已提交
4053
		return 0;
L
Linus Torvalds 已提交
4054 4055 4056 4057 4058 4059 4060 4061 4062 4063
	}
	brdp->brdtype = brdtype;
/*
 *	We have all resources from the board, so lets setup the actual
 *	board structure now.
 */
	brdp->iobase = pci_resource_start(devp, 3);
	brdp->memaddr = pci_resource_start(devp, 2);
	stli_brdinit(brdp);

A
Alan Cox 已提交
4064
	return 0;
L
Linus Torvalds 已提交
4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075
}

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

/*
 *	Find all Stallion PCI boards that might be installed. Initialize each
 *	one as it is found.
 */

static int stli_findpcibrds(void)
{
A
Alan Cox 已提交
4076
	struct pci_dev *dev = NULL;
L
Linus Torvalds 已提交
4077

A
Alan Cox 已提交
4078 4079
	while ((dev = pci_get_device(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA, dev))) {
		stli_initpcibrd(BRD_ECPPCI, dev);
L
Linus Torvalds 已提交
4080
	}
A
Alan Cox 已提交
4081
	return 0;
L
Linus Torvalds 已提交
4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093
}

#endif

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

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

static stlibrd_t *stli_allocbrd(void)
{
A
Alan Cox 已提交
4094
	stlibrd_t *brdp;
L
Linus Torvalds 已提交
4095

4096 4097
	brdp = kzalloc(sizeof(stlibrd_t), GFP_KERNEL);
	if (!brdp) {
L
Linus Torvalds 已提交
4098
		printk(KERN_ERR "STALLION: failed to allocate memory "
A
Alan Cox 已提交
4099
				"(size=%Zd)\n", sizeof(stlibrd_t));
4100
		return NULL;
L
Linus Torvalds 已提交
4101 4102
	}
	brdp->magic = STLI_BOARDMAGIC;
A
Alan Cox 已提交
4103
	return brdp;
L
Linus Torvalds 已提交
4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114
}

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

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

static int stli_initbrds(void)
{
A
Alan Cox 已提交
4115 4116 4117
	stlibrd_t *brdp, *nxtbrdp;
	stlconf_t *confp;
	int i, j;
L
Linus Torvalds 已提交
4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132

	if (stli_nrbrds > STL_MAXBRDS) {
		printk(KERN_INFO "STALLION: too many boards in configuration "
			"table, truncating to %d\n", STL_MAXBRDS);
		stli_nrbrds = STL_MAXBRDS;
	}

/*
 *	Firstly scan the list of static boards configured. Allocate
 *	resources and initialize the boards as found. If this is a
 *	module then let the module args override static configuration.
 */
	for (i = 0; (i < stli_nrbrds); i++) {
		confp = &stli_brdconf[i];
		stli_parsebrd(confp, stli_brdsp[i]);
A
Alan Cox 已提交
4133 4134
		if ((brdp = stli_allocbrd()) == NULL)
			return -ENOMEM;
L
Linus Torvalds 已提交
4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146
		brdp->brdnr = i;
		brdp->brdtype = confp->brdtype;
		brdp->iobase = confp->ioaddr1;
		brdp->memaddr = confp->memaddr;
		stli_brdinit(brdp);
	}

/*
 *	Static configuration table done, so now use dynamic methods to
 *	see if any more boards should be configured.
 */
	stli_argbrds();
4147
	if (STLI_EISAPROBE)
L
Linus Torvalds 已提交
4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161
		stli_findeisabrds();
#ifdef CONFIG_PCI
	stli_findpcibrds();
#endif

/*
 *	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
4162
			if (brdp == NULL)
L
Linus Torvalds 已提交
4163 4164 4165
				continue;
			for (j = i + 1; (j < stli_nrbrds); j++) {
				nxtbrdp = stli_brds[j];
A
Alan Cox 已提交
4166
				if (nxtbrdp == NULL)
L
Linus Torvalds 已提交
4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180
					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
4181
			if (brdp == NULL)
L
Linus Torvalds 已提交
4182 4183 4184 4185 4186 4187 4188 4189 4190
				continue;
			if (brdp->state & BST_FOUND) {
				EBRDENABLE(brdp);
				brdp->enable = NULL;
				brdp->disable = NULL;
			}
		}
	}

A
Alan Cox 已提交
4191
	return 0;
L
Linus Torvalds 已提交
4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203
}

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

/*
 *	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
4204 4205 4206 4207 4208 4209
	unsigned long flags;
	void *memptr;
	stlibrd_t *brdp;
	int brdnr, size, n;
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4210 4211 4212

	brdnr = iminor(fp->f_dentry->d_inode);
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4213
		return -ENODEV;
L
Linus Torvalds 已提交
4214
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4215 4216
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4217
	if (brdp->state == 0)
A
Alan Cox 已提交
4218 4219 4220
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4221

A
Alan Cox 已提交
4222 4223 4224 4225 4226 4227 4228 4229 4230
	size = MIN(count, (brdp->memsize - off));

	/*
	 *	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
4231 4232

	while (size > 0) {
A
Alan Cox 已提交
4233 4234 4235 4236 4237 4238 4239 4240 4241
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
		memptr = (void *) EBRDGETMEMPTR(brdp, off);
		n = MIN(size, (brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = MIN(n, PAGE_SIZE);
		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
4242 4243 4244
			count = -EFAULT;
			goto out;
		}
A
Alan Cox 已提交
4245
		off += n;
L
Linus Torvalds 已提交
4246 4247 4248 4249
		buf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4250 4251 4252
	*offp = off;
	free_page((unsigned long)p);
	return count;
L
Linus Torvalds 已提交
4253 4254 4255 4256 4257 4258 4259 4260
}

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

/*
 *	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
4261 4262
 *
 *	FIXME: copy under lock
L
Linus Torvalds 已提交
4263 4264 4265 4266
 */

static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp)
{
A
Alan Cox 已提交
4267 4268 4269 4270 4271 4272 4273
	unsigned long flags;
	void *memptr;
	stlibrd_t *brdp;
	char __user *chbuf;
	int brdnr, size, n;
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4274 4275

	brdnr = iminor(fp->f_dentry->d_inode);
A
Alan Cox 已提交
4276

L
Linus Torvalds 已提交
4277
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4278
		return -ENODEV;
L
Linus Torvalds 已提交
4279
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4280 4281
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4282
	if (brdp->state == 0)
A
Alan Cox 已提交
4283 4284 4285
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4286 4287

	chbuf = (char __user *) buf;
A
Alan Cox 已提交
4288 4289 4290 4291 4292 4293 4294 4295 4296
	size = MIN(count, (brdp->memsize - off));

	/*
	 *	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
4297 4298

	while (size > 0) {
A
Alan Cox 已提交
4299 4300 4301 4302 4303
		n = MIN(size, (brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = MIN(n, PAGE_SIZE);
		if (copy_from_user(p, chbuf, n)) {
			if (count == 0)
				count = -EFAULT;
L
Linus Torvalds 已提交
4304 4305
			goto out;
		}
A
Alan Cox 已提交
4306 4307 4308 4309 4310 4311 4312
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
		memptr = (void *) EBRDGETMEMPTR(brdp, off);
		memcpy_toio(memptr, p, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		off += n;
L
Linus Torvalds 已提交
4313 4314 4315 4316
		chbuf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4317 4318 4319
	free_page((unsigned long) p);
	*offp = off;
	return count;
L
Linus Torvalds 已提交
4320 4321 4322 4323 4324 4325 4326 4327 4328 4329
}

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

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

static int stli_getbrdstats(combrd_t __user *bp)
{
A
Alan Cox 已提交
4330 4331
	stlibrd_t *brdp;
	int i;
L
Linus Torvalds 已提交
4332 4333 4334 4335

	if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t)))
		return -EFAULT;
	if (stli_brdstats.brd >= STL_MAXBRDS)
A
Alan Cox 已提交
4336
		return -ENODEV;
L
Linus Torvalds 已提交
4337
	brdp = stli_brds[stli_brdstats.brd];
A
Alan Cox 已提交
4338 4339
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357

	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
4358
	return 0;
L
Linus Torvalds 已提交
4359 4360 4361 4362 4363 4364 4365 4366 4367 4368
}

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

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

static stliport_t *stli_getport(int brdnr, int panelnr, int portnr)
{
A
Alan Cox 已提交
4369 4370
	stlibrd_t *brdp;
	int i;
L
Linus Torvalds 已提交
4371

A
Alan Cox 已提交
4372 4373
	if (brdnr < 0 || brdnr >= STL_MAXBRDS)
		return NULL;
L
Linus Torvalds 已提交
4374
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4375 4376
	if (brdp == NULL)
		return NULL;
L
Linus Torvalds 已提交
4377 4378 4379
	for (i = 0; (i < panelnr); i++)
		portnr += brdp->panels[i];
	if ((portnr < 0) || (portnr >= brdp->nrports))
A
Alan Cox 已提交
4380 4381
		return NULL;
	return brdp->ports[portnr];
L
Linus Torvalds 已提交
4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399
}

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

/*
 *	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).
 */

static int stli_portcmdstats(stliport_t *portp)
{
	unsigned long	flags;
	stlibrd_t	*brdp;
	int		rc;

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

A
Alan Cox 已提交
4400 4401
	if (portp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4402
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
4403 4404
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4405 4406 4407 4408

	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
4409
			return rc;
L
Linus Torvalds 已提交
4410 4411 4412 4413 4414 4415 4416 4417 4418 4419
	} 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
4420 4421
	spin_lock_irqsave(&brd_lock, flags);
	if (portp->tty != NULL) {
L
Linus Torvalds 已提交
4422 4423
		if (portp->tty->driver_data == portp) {
			stli_comstats.ttystate = portp->tty->flags;
A
Alan Cox 已提交
4424 4425
			stli_comstats.rxbuffered = -1;
			if (portp->tty->termios != NULL) {
L
Linus Torvalds 已提交
4426 4427 4428 4429 4430 4431 4432
				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
4433
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454

	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
4455
	return 0;
L
Linus Torvalds 已提交
4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467
}

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

/*
 *	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).
 */

static int stli_getportstats(stliport_t *portp, comstats_t __user *cp)
{
A
Alan Cox 已提交
4468 4469
	stlibrd_t *brdp;
	int rc;
L
Linus Torvalds 已提交
4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498

	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...
 */

static int stli_clrportstats(stliport_t *portp, comstats_t __user *cp)
{
A
Alan Cox 已提交
4499 4500
	stlibrd_t *brdp;
	int rc;
L
Linus Torvalds 已提交
4501 4502 4503 4504 4505 4506 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

	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.
 */

static int stli_getportstruct(stliport_t __user *arg)
{
A
Alan Cox 已提交
4538
	stliport_t *portp;
L
Linus Torvalds 已提交
4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558

	if (copy_from_user(&stli_dummyport, arg, sizeof(stliport_t)))
		return -EFAULT;
	portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
		 stli_dummyport.portnr);
	if (!portp)
		return -ENODEV;
	if (copy_to_user(arg, portp, sizeof(stliport_t)))
		return -EFAULT;
	return 0;
}

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

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

static int stli_getbrdstruct(stlibrd_t __user *arg)
{
A
Alan Cox 已提交
4559
	stlibrd_t *brdp;
L
Linus Torvalds 已提交
4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582

	if (copy_from_user(&stli_dummybrd, arg, sizeof(stlibrd_t)))
		return -EFAULT;
	if ((stli_dummybrd.brdnr < 0) || (stli_dummybrd.brdnr >= STL_MAXBRDS))
		return -ENODEV;
	brdp = stli_brds[stli_dummybrd.brdnr];
	if (!brdp)
		return -ENODEV;
	if (copy_to_user(arg, brdp, sizeof(stlibrd_t)))
		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)
{
A
Alan Cox 已提交
4583 4584
	stlibrd_t *brdp;
	int brdnr, rc, done;
L
Linus Torvalds 已提交
4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616
	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
4617
		return rc;
L
Linus Torvalds 已提交
4618 4619 4620 4621 4622 4623 4624

/*
 *	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
4625
		return -ENODEV;
L
Linus Torvalds 已提交
4626 4627
	brdp = stli_brds[brdnr];
	if (!brdp)
A
Alan Cox 已提交
4628
		return -ENODEV;
L
Linus Torvalds 已提交
4629
	if (brdp->state == 0)
A
Alan Cox 已提交
4630
		return -ENODEV;
L
Linus Torvalds 已提交
4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653

	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
4654
	return rc;
L
Linus Torvalds 已提交
4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682
}

static struct tty_operations stli_ops = {
	.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
4683
static int __init stli_init(void)
L
Linus Torvalds 已提交
4684 4685 4686 4687
{
	int i;
	printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);

A
Alan Cox 已提交
4688 4689 4690
	spin_lock_init(&stli_lock);
	spin_lock_init(&brd_lock);

L
Linus Torvalds 已提交
4691 4692 4693 4694 4695 4696 4697 4698 4699
	stli_initbrds();

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

/*
 *	Allocate a temporary write buffer.
 */
4700 4701
	stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
	if (!stli_txcookbuf)
L
Linus Torvalds 已提交
4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712
		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");

4713
	istallion_class = class_create(THIS_MODULE, "staliomem");
4714
	for (i = 0; i < 4; i++)
4715 4716
		class_device_create(istallion_class, NULL,
				MKDEV(STL_SIOMEMMAJOR, i),
L
Linus Torvalds 已提交
4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737
				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;
	}
A
Alan Cox 已提交
4738
	return 0;
L
Linus Torvalds 已提交
4739 4740 4741
}

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