istallion.c 123.3 KB
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/*****************************************************************************/

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

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

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

#include <linux/pci.h>

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

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

#define	BRD_BRUMBY	BRD_BRUMBY4

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

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

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

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

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

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

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

static struct tty_driver	*stli_serial;


#define	STLI_TXBUFSIZE		4096

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

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

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

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

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

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

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

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

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

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

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

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

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


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

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

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

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

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

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

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

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

#define	STL_EISAID	0x8c4e

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

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

#define	ECP_EISAID	0x4

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

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

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

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

#define	ONB_MEMENABLO	0
#define	ONB_MEMENABHI	0x02

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

#define	ONB_EISAID	0x1

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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static int	stli_parsebrd(struct stlconf *confp, char **argp);
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static int	stli_open(struct tty_struct *tty, struct file *filp);
static void	stli_close(struct tty_struct *tty, struct file *filp);
static int	stli_write(struct tty_struct *tty, const unsigned char *buf, int count);
static void	stli_putchar(struct tty_struct *tty, unsigned char ch);
static void	stli_flushchars(struct tty_struct *tty);
static int	stli_writeroom(struct tty_struct *tty);
static int	stli_charsinbuffer(struct tty_struct *tty);
static int	stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
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static void	stli_settermios(struct tty_struct *tty, struct ktermios *old);
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static void	stli_throttle(struct tty_struct *tty);
static void	stli_unthrottle(struct tty_struct *tty);
static void	stli_stop(struct tty_struct *tty);
static void	stli_start(struct tty_struct *tty);
static void	stli_flushbuffer(struct tty_struct *tty);
static void	stli_breakctl(struct tty_struct *tty, int state);
static void	stli_waituntilsent(struct tty_struct *tty, int timeout);
static void	stli_sendxchar(struct tty_struct *tty, char ch);
static void	stli_hangup(struct tty_struct *tty);
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static int	stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos);
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static int	stli_brdinit(struct stlibrd *brdp);
static int	stli_startbrd(struct stlibrd *brdp);
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static ssize_t	stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp);
static ssize_t	stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp);
static int	stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
623
static void	stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp);
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static void	stli_poll(unsigned long arg);
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static int	stli_hostcmd(struct stlibrd *brdp, struct stliport *portp);
static int	stli_initopen(struct stlibrd *brdp, struct stliport *portp);
static int	stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
static int	stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
static int	stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp);
630
static void	stli_dohangup(struct work_struct *);
631 632 633 634 635 636
static int	stli_setport(struct stliport *portp);
static int	stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	__stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
static void	stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp);
static void	stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp);
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static void	stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
static long	stli_mktiocm(unsigned long sigvalue);
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static void	stli_read(struct stlibrd *brdp, struct stliport *portp);
static int	stli_getserial(struct stliport *portp, struct serial_struct __user *sp);
static int	stli_setserial(struct stliport *portp, struct serial_struct __user *sp);
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static int	stli_getbrdstats(combrd_t __user *bp);
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static int	stli_getportstats(struct stliport *portp, comstats_t __user *cp);
static int	stli_portcmdstats(struct stliport *portp);
static int	stli_clrportstats(struct stliport *portp, comstats_t __user *cp);
static int	stli_getportstruct(struct stliport __user *arg);
static int	stli_getbrdstruct(struct stlibrd __user *arg);
static struct stlibrd *stli_allocbrd(void);

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

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

686
static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr, unsigned int portnr);
687 688 689

static int	stli_initecp(struct stlibrd *brdp);
static int	stli_initonb(struct stlibrd *brdp);
690
#if STLI_EISAPROBE != 0
691
static int	stli_eisamemprobe(struct stlibrd *brdp);
692
#endif
693
static int	stli_initports(struct stlibrd *brdp);
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/*****************************************************************************/

/*
 *	Define the driver info for a user level shared memory device. This
 *	device will work sort of like the /dev/kmem device - except that it
 *	will give access to the shared memory on the Stallion intelligent
 *	board. This is also a very useful debugging tool.
 */
703
static const struct file_operations	stli_fsiomem = {
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	.owner		= THIS_MODULE,
	.read		= stli_memread,
	.write		= stli_memwrite,
	.ioctl		= stli_memioctl,
};

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

/*
 *	Define a timer_list entry for our poll routine. The slave board
 *	is polled every so often to see if anything needs doing. This is
 *	much cheaper on host cpu than using interrupts. It turns out to
 *	not increase character latency by much either...
 */
718
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)

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

729
static struct class *istallion_class;
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731
static void stli_cleanup_ports(struct stlibrd *brdp)
732
{
733
	struct stliport *portp;
734 735 736 737 738 739 740 741 742 743 744 745
	unsigned int j;

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

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

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

752
static int stli_parsebrd(struct stlconf *confp, char **argp)
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{
754
	unsigned int i;
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	char *sp;
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	if (argp[0] == NULL || *argp[0] == 0)
		return 0;
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	for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
761
		*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;
	}
767
	if (i == ARRAY_SIZE(stli_brdstr)) {
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		printk("STALLION: unknown board name, %s?\n", argp[0]);
769
		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 = simple_strtoul(argp[1], NULL, 0);
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	if (argp[2] !=  NULL && *argp[2] != 0)
776
		confp->memaddr = simple_strtoul(argp[2], NULL, 0);
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	return(1);
}

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

static int stli_open(struct tty_struct *tty, struct file *filp)
{
784 785
	struct stlibrd *brdp;
	struct stliport *portp;
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	unsigned int minordev, brdnr, portnr;
	int rc;
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	minordev = tty->index;
	brdnr = MINOR2BRD(minordev);
	if (brdnr >= stli_nrbrds)
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		return -ENODEV;
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	brdp = stli_brds[brdnr];
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	if (brdp == NULL)
		return -ENODEV;
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	if ((brdp->state & BST_STARTED) == 0)
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		return -ENODEV;
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	portnr = MINOR2PORT(minordev);
799
	if (portnr > brdp->nrports)
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		return -ENODEV;
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	portp = brdp->ports[portnr];
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	if (portp == NULL)
		return -ENODEV;
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	if (portp->devnr < 1)
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		return -ENODEV;
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/*
 *	Check if this port is in the middle of closing. If so then wait
 *	until it is closed then return error status based on flag settings.
 *	The sleep here does not need interrupt protection since the wakeup
 *	for it is done with the same context.
 */
	if (portp->flags & ASYNC_CLOSING) {
		interruptible_sleep_on(&portp->close_wait);
		if (portp->flags & ASYNC_HUP_NOTIFY)
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			return -EAGAIN;
		return -ERESTARTSYS;
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	}

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

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

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

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

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

static void stli_close(struct tty_struct *tty, struct file *filp)
{
879 880
	struct stlibrd *brdp;
	struct stliport *portp;
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	unsigned long flags;
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	portp = tty->driver_data;
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	if (portp == NULL)
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		return;

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

	portp->flags |= ASYNC_CLOSING;

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

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

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

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

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

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

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

957
static int stli_initopen(struct stlibrd *brdp, struct stliport *portp)
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{
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	struct tty_struct *tty;
	asynotify_t nt;
	asyport_t aport;
	int rc;
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	if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
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		return rc;
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	memset(&nt, 0, sizeof(asynotify_t));
	nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
	nt.signal = SG_DCD;
	if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt,
	    sizeof(asynotify_t), 0)) < 0)
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		return rc;
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	tty = portp->tty;
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	if (tty == NULL)
		return -ENODEV;
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	stli_mkasyport(portp, &aport, tty->termios);
	if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
	    sizeof(asyport_t), 0)) < 0)
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		return rc;
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	set_bit(ST_GETSIGS, &portp->state);
	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
	    sizeof(asysigs_t), 1)) < 0)
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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.
 */

1005
static int stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
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{
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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;
A
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	writeb(readb(bits) | portp->portbit, bits);
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1043 1044 1045
	EBRDDISABLE(brdp);

	if (wait == 0) {
A
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1046 1047
		spin_unlock_irqrestore(&brd_lock, flags);
		return 0;
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1048 1049 1050 1051 1052 1053 1054 1055
	}

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

L
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1058 1059 1060 1061 1062 1063 1064
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_OPENING, &portp->state));
	if (signal_pending(current))
		rc = -ERESTARTSYS;

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

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

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

1076
static int stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait)
L
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{
A
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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);
A
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1101 1102 1103 1104 1105
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
	writel(arg, &cp->closearg);
	writeb(1, &cp->close);
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
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		portp->portidx;
A
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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).
 */

1140
static int stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
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{
	wait_event_interruptible(portp->raw_wait,
			!test_bit(ST_CMDING, &portp->state));
A
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	if (signal_pending(current))
L
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1145 1146 1147 1148 1149 1150
		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))
L
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		return -ERESTARTSYS;

	if (portp->rc != 0)
A
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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.
 */

1166
static int stli_setport(struct stliport *portp)
L
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{
1168
	struct stlibrd *brdp;
A
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1169
	asyport_t aport;
L
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1170

A
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	if (portp == NULL)
		return -ENODEV;
	if (portp->tty == NULL)
		return -ENODEV;
1175
	if (portp->brdnr >= stli_nrbrds)
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		return -ENODEV;
L
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	brdp = stli_brds[portp->brdnr];
A
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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...
 */

1192
static int stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp)
L
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{
A
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	unsigned long flags;
	int rc, doclocal;
L
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1196 1197 1198 1199 1200 1201 1202

	rc = 0;
	doclocal = 0;

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

A
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1203
	spin_lock_irqsave(&stli_lock, flags);
L
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1204 1205 1206
	portp->openwaitcnt++;
	if (! tty_hung_up_p(filp))
		portp->refcount--;
A
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1207
	spin_unlock_irqrestore(&stli_lock, flags);
L
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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);
	}

A
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	spin_lock_irqsave(&stli_lock, flags);
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	if (! tty_hung_up_p(filp))
		portp->refcount++;
	portp->openwaitcnt--;
A
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1237
	spin_unlock_irqrestore(&stli_lock, flags);
L
Linus Torvalds 已提交
1238

A
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1239
	return rc;
L
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}

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

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

static int stli_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
A
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1252 1253 1254 1255 1256
	cdkasy_t __iomem *ap;
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	unsigned char __iomem *shbuf;
	unsigned char *chbuf;
1257 1258
	struct stliport *portp;
	struct stlibrd *brdp;
A
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1259 1260
	unsigned int len, stlen, head, tail, size;
	unsigned long flags;
L
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	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
A
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1265 1266
	if (portp == NULL)
		return 0;
1267
	if (portp->brdnr >= stli_nrbrds)
A
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1268
		return 0;
L
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1269
	brdp = stli_brds[portp->brdnr];
A
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1270 1271
	if (brdp == NULL)
		return 0;
L
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1272 1273 1274 1275 1276
	chbuf = (unsigned char *) buf;

/*
 *	All data is now local, shove as much as possible into shared memory.
 */
A
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1277
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1278
	EBRDENABLE(brdp);
A
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1279 1280 1281 1282 1283
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
L
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1284 1285 1286 1287 1288 1289 1290 1291 1292
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

1293
	len = min(len, (unsigned int)count);
L
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1294
	count = 0;
A
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1295
	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset);
L
Linus Torvalds 已提交
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	while (len > 0) {
1298
		stlen = min(len, stlen);
A
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1299
		memcpy_toio(shbuf + head, chbuf, stlen);
L
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		chbuf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

A
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	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
L
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1312
	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);
L
Linus Torvalds 已提交
1315
	}
A
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	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
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1318
		portp->portidx;
A
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1319
	writeb(readb(bits) | portp->portbit, bits);
L
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1320 1321
	set_bit(ST_TXBUSY, &portp->state);
	EBRDDISABLE(brdp);
A
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1322
	spin_unlock_irqrestore(&brd_lock, flags);
L
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1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339

	return(count);
}

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

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

static void stli_putchar(struct tty_struct *tty, unsigned char ch)
{
	if (tty != stli_txcooktty) {
A
Alan Cox 已提交
1340
		if (stli_txcooktty != NULL)
L
Linus Torvalds 已提交
1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359
			stli_flushchars(stli_txcooktty);
		stli_txcooktty = tty;
	}

	stli_txcookbuf[stli_txcooksize++] = ch;
}

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

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

static void stli_flushchars(struct tty_struct *tty)
{
A
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1360 1361 1362 1363
	cdkhdr_t __iomem *hdrp;
	unsigned char __iomem *bits;
	cdkasy_t __iomem *ap;
	struct tty_struct *cooktty;
1364 1365
	struct stliport *portp;
	struct stlibrd *brdp;
A
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1366 1367 1368 1369
	unsigned int len, stlen, head, tail, size, count, cooksize;
	unsigned char *buf;
	unsigned char __iomem *shbuf;
	unsigned long flags;
L
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1370 1371 1372 1373 1374

	cooksize = stli_txcooksize;
	cooktty = stli_txcooktty;
	stli_txcooksize = 0;
	stli_txcookrealsize = 0;
A
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1375
	stli_txcooktty = NULL;
L
Linus Torvalds 已提交
1376

A
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1377
	if (tty == NULL)
L
Linus Torvalds 已提交
1378
		return;
A
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1379
	if (cooktty == NULL)
L
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1380 1381 1382 1383 1384 1385 1386
		return;
	if (tty != cooktty)
		tty = cooktty;
	if (cooksize == 0)
		return;

	portp = tty->driver_data;
A
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1387
	if (portp == NULL)
L
Linus Torvalds 已提交
1388
		return;
1389
	if (portp->brdnr >= stli_nrbrds)
L
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1390 1391
		return;
	brdp = stli_brds[portp->brdnr];
A
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1392
	if (brdp == NULL)
L
Linus Torvalds 已提交
1393 1394
		return;

A
Alan Cox 已提交
1395
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1396 1397
	EBRDENABLE(brdp);

A
Alan Cox 已提交
1398 1399 1400 1401 1402
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	head = (unsigned int) readw(&ap->txq.head);
	tail = (unsigned int) readw(&ap->txq.tail);
	if (tail != ((unsigned int) readw(&ap->txq.tail)))
		tail = (unsigned int) readw(&ap->txq.tail);
L
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1403 1404 1405 1406 1407 1408 1409 1410 1411
	size = portp->txsize;
	if (head >= tail) {
		len = size - (head - tail) - 1;
		stlen = size - head;
	} else {
		len = tail - head - 1;
		stlen = len;
	}

1412
	len = min(len, cooksize);
L
Linus Torvalds 已提交
1413
	count = 0;
1414
	shbuf = EBRDGETMEMPTR(brdp, portp->txoffset);
L
Linus Torvalds 已提交
1415 1416 1417
	buf = stli_txcookbuf;

	while (len > 0) {
1418
		stlen = min(len, stlen);
A
Alan Cox 已提交
1419
		memcpy_toio(shbuf + head, buf, stlen);
L
Linus Torvalds 已提交
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429
		buf += stlen;
		len -= stlen;
		count += stlen;
		head += stlen;
		if (head >= size) {
			head = 0;
			stlen = tail;
		}
	}

A
Alan Cox 已提交
1430 1431
	ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr);
	writew(head, &ap->txq.head);
L
Linus Torvalds 已提交
1432 1433

	if (test_bit(ST_TXBUSY, &portp->state)) {
A
Alan Cox 已提交
1434 1435
		if (readl(&ap->changed.data) & DT_TXEMPTY)
			writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data);
L
Linus Torvalds 已提交
1436
	}
A
Alan Cox 已提交
1437 1438
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
	bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset +
L
Linus Torvalds 已提交
1439
		portp->portidx;
A
Alan Cox 已提交
1440
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
1441 1442 1443
	set_bit(ST_TXBUSY, &portp->state);

	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1444
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1445 1446 1447 1448 1449 1450
}

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

static int stli_writeroom(struct tty_struct *tty)
{
A
Alan Cox 已提交
1451
	cdkasyrq_t __iomem *rp;
1452 1453
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1454 1455
	unsigned int head, tail, len;
	unsigned long flags;
L
Linus Torvalds 已提交
1456 1457 1458 1459

	if (tty == stli_txcooktty) {
		if (stli_txcookrealsize != 0) {
			len = stli_txcookrealsize - stli_txcooksize;
A
Alan Cox 已提交
1460
			return len;
L
Linus Torvalds 已提交
1461 1462 1463 1464
		}
	}

	portp = tty->driver_data;
A
Alan Cox 已提交
1465 1466
	if (portp == NULL)
		return 0;
1467
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1468
		return 0;
L
Linus Torvalds 已提交
1469
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1470 1471
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1472

A
Alan Cox 已提交
1473
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1474
	EBRDENABLE(brdp);
A
Alan Cox 已提交
1475 1476 1477 1478 1479
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
L
Linus Torvalds 已提交
1480 1481 1482
	len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
	len--;
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1483
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1484 1485 1486 1487 1488

	if (tty == stli_txcooktty) {
		stli_txcookrealsize = len;
		len -= stli_txcooksize;
	}
A
Alan Cox 已提交
1489
	return len;
L
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1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503
}

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

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

static int stli_charsinbuffer(struct tty_struct *tty)
{
A
Alan Cox 已提交
1504
	cdkasyrq_t __iomem *rp;
1505 1506
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1507 1508
	unsigned int head, tail, len;
	unsigned long flags;
L
Linus Torvalds 已提交
1509 1510 1511 1512

	if (tty == stli_txcooktty)
		stli_flushchars(tty);
	portp = tty->driver_data;
A
Alan Cox 已提交
1513 1514
	if (portp == NULL)
		return 0;
1515
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1516
		return 0;
L
Linus Torvalds 已提交
1517
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1518 1519
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1520

A
Alan Cox 已提交
1521
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1522
	EBRDENABLE(brdp);
A
Alan Cox 已提交
1523 1524 1525 1526 1527
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
	head = (unsigned int) readw(&rp->head);
	tail = (unsigned int) readw(&rp->tail);
	if (tail != ((unsigned int) readw(&rp->tail)))
		tail = (unsigned int) readw(&rp->tail);
L
Linus Torvalds 已提交
1528 1529 1530 1531
	len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
	if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
		len = 1;
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
1532
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
1533

A
Alan Cox 已提交
1534
	return len;
L
Linus Torvalds 已提交
1535 1536 1537 1538 1539 1540 1541 1542
}

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

/*
 *	Generate the serial struct info.
 */

1543
static int stli_getserial(struct stliport *portp, struct serial_struct __user *sp)
L
Linus Torvalds 已提交
1544
{
A
Alan Cox 已提交
1545
	struct serial_struct sio;
1546
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560

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

	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1561
	if (brdp != NULL)
L
Linus Torvalds 已提交
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575
		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.
 */

1576
static int stli_setserial(struct stliport *portp, struct serial_struct __user *sp)
L
Linus Torvalds 已提交
1577
{
A
Alan Cox 已提交
1578 1579
	struct serial_struct sio;
	int rc;
L
Linus Torvalds 已提交
1580 1581 1582 1583 1584 1585 1586 1587

	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
1588
			return -EPERM;
L
Linus Torvalds 已提交
1589 1590 1591 1592 1593 1594 1595 1596 1597 1598
	} 

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

	if ((rc = stli_setport(portp)) < 0)
A
Alan Cox 已提交
1599 1600
		return rc;
	return 0;
L
Linus Torvalds 已提交
1601 1602 1603 1604 1605 1606
}

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

static int stli_tiocmget(struct tty_struct *tty, struct file *file)
{
1607 1608
	struct stliport *portp = tty->driver_data;
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1609 1610
	int rc;

A
Alan Cox 已提交
1611 1612
	if (portp == NULL)
		return -ENODEV;
1613
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1614
		return 0;
L
Linus Torvalds 已提交
1615
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1616 1617
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1618
	if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1619
		return -EIO;
L
Linus Torvalds 已提交
1620 1621 1622

	if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
			       &portp->asig, sizeof(asysigs_t), 1)) < 0)
A
Alan Cox 已提交
1623
		return rc;
L
Linus Torvalds 已提交
1624 1625 1626 1627 1628 1629 1630

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

static int stli_tiocmset(struct tty_struct *tty, struct file *file,
			 unsigned int set, unsigned int clear)
{
1631 1632
	struct stliport *portp = tty->driver_data;
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
1633 1634
	int rts = -1, dtr = -1;

A
Alan Cox 已提交
1635 1636
	if (portp == NULL)
		return -ENODEV;
1637
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1638
		return 0;
L
Linus Torvalds 已提交
1639
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1640 1641
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1642
	if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1643
		return -EIO;
L
Linus Torvalds 已提交
1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661

	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)
{
1662 1663
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1664 1665
	unsigned int ival;
	int rc;
L
Linus Torvalds 已提交
1666 1667 1668
	void __user *argp = (void __user *)arg;

	portp = tty->driver_data;
A
Alan Cox 已提交
1669 1670
	if (portp == NULL)
		return -ENODEV;
1671
	if (portp->brdnr >= stli_nrbrds)
A
Alan Cox 已提交
1672
		return 0;
L
Linus Torvalds 已提交
1673
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1674 1675
	if (brdp == NULL)
		return 0;
L
Linus Torvalds 已提交
1676 1677 1678 1679

	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
 	    (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
		if (tty->flags & (1 << TTY_IO_ERROR))
A
Alan Cox 已提交
1680
			return -EIO;
L
Linus Torvalds 已提交
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
	}

	rc = 0;

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

A
Alan Cox 已提交
1727
	return rc;
L
Linus Torvalds 已提交
1728 1729 1730 1731 1732 1733 1734 1735 1736
}

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

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

A
Alan Cox 已提交
1737
static void stli_settermios(struct tty_struct *tty, struct ktermios *old)
L
Linus Torvalds 已提交
1738
{
1739 1740
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1741
	struct ktermios *tiosp;
A
Alan Cox 已提交
1742
	asyport_t aport;
L
Linus Torvalds 已提交
1743

A
Alan Cox 已提交
1744
	if (tty == NULL)
L
Linus Torvalds 已提交
1745 1746
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
1747
	if (portp == NULL)
L
Linus Torvalds 已提交
1748
		return;
1749
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1750 1751
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1752
	if (brdp == NULL)
L
Linus Torvalds 已提交
1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781
		return;

	tiosp = tty->termios;

	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)
{
1782
	struct stliport	*portp = tty->driver_data;
A
Alan Cox 已提交
1783
	if (portp == NULL)
L
Linus Torvalds 已提交
1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797
		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)
{
1798
	struct stliport	*portp = tty->driver_data;
A
Alan Cox 已提交
1799
	if (portp == NULL)
L
Linus Torvalds 已提交
1800 1801 1802 1803 1804 1805 1806
		return;
	clear_bit(ST_RXSTOP, &portp->state);
}

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

/*
A
Alan Cox 已提交
1807
 *	Stop the transmitter.
L
Linus Torvalds 已提交
1808 1809 1810 1811 1812 1813 1814 1815 1816
 */

static void stli_stop(struct tty_struct *tty)
{
}

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

/*
A
Alan Cox 已提交
1817
 *	Start the transmitter again.
L
Linus Torvalds 已提交
1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
 */

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).
 */

1835
static void stli_dohangup(struct work_struct *ugly_api)
L
Linus Torvalds 已提交
1836
{
1837
	struct stliport *portp = container_of(ugly_api, struct stliport, tqhangup);
A
Alan Cox 已提交
1838 1839
	if (portp->tty != NULL) {
		tty_hangup(portp->tty);
L
Linus Torvalds 已提交
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
	}
}

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

/*
 *	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)
{
1854 1855
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1856
	unsigned long flags;
L
Linus Torvalds 已提交
1857 1858

	portp = tty->driver_data;
A
Alan Cox 已提交
1859
	if (portp == NULL)
L
Linus Torvalds 已提交
1860
		return;
1861
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1862 1863
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1864
	if (brdp == NULL)
L
Linus Torvalds 已提交
1865 1866 1867 1868
		return;

	portp->flags &= ~ASYNC_INITIALIZED;

A
Alan Cox 已提交
1869
	if (!test_bit(ST_CLOSING, &portp->state))
L
Linus Torvalds 已提交
1870
		stli_rawclose(brdp, portp, 0, 0);
A
Alan Cox 已提交
1871 1872

	spin_lock_irqsave(&stli_lock, flags);
L
Linus Torvalds 已提交
1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
	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
1888
	portp->tty = NULL;
L
Linus Torvalds 已提交
1889 1890
	portp->flags &= ~ASYNC_NORMAL_ACTIVE;
	portp->refcount = 0;
A
Alan Cox 已提交
1891 1892
	spin_unlock_irqrestore(&stli_lock, flags);

L
Linus Torvalds 已提交
1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906
	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)
{
1907 1908
	struct stliport *portp;
	struct stlibrd *brdp;
A
Alan Cox 已提交
1909
	unsigned long ftype, flags;
L
Linus Torvalds 已提交
1910 1911

	portp = tty->driver_data;
A
Alan Cox 已提交
1912
	if (portp == NULL)
L
Linus Torvalds 已提交
1913
		return;
1914
	if (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
		return;

A
Alan Cox 已提交
1920
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
1921
	if (tty == stli_txcooktty) {
A
Alan Cox 已提交
1922
		stli_txcooktty = NULL;
L
Linus Torvalds 已提交
1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
		stli_txcooksize = 0;
		stli_txcookrealsize = 0;
	}
	if (test_bit(ST_CMDING, &portp->state)) {
		set_bit(ST_DOFLUSHTX, &portp->state);
	} else {
		ftype = FLUSHTX;
		if (test_bit(ST_DOFLUSHRX, &portp->state)) {
			ftype |= FLUSHRX;
			clear_bit(ST_DOFLUSHRX, &portp->state);
		}
A
Alan Cox 已提交
1934
		__stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(u32), 0);
L
Linus Torvalds 已提交
1935
	}
A
Alan Cox 已提交
1936 1937
	spin_unlock_irqrestore(&brd_lock, flags);
	tty_wakeup(tty);
L
Linus Torvalds 已提交
1938 1939 1940 1941 1942 1943
}

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

static void stli_breakctl(struct tty_struct *tty, int state)
{
1944 1945
	struct stlibrd	*brdp;
	struct stliport	*portp;
L
Linus Torvalds 已提交
1946 1947 1948
	long		arg;

	portp = tty->driver_data;
A
Alan Cox 已提交
1949
	if (portp == NULL)
L
Linus Torvalds 已提交
1950
		return;
1951
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1952 1953
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
1954
	if (brdp == NULL)
L
Linus Torvalds 已提交
1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
		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)
{
1965
	struct stliport *portp;
A
Alan Cox 已提交
1966
	unsigned long tend;
L
Linus Torvalds 已提交
1967

A
Alan Cox 已提交
1968
	if (tty == NULL)
L
Linus Torvalds 已提交
1969 1970
		return;
	portp = tty->driver_data;
A
Alan Cox 已提交
1971
	if (portp == NULL)
L
Linus Torvalds 已提交
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
		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)
{
1991 1992
	struct stlibrd	*brdp;
	struct stliport	*portp;
L
Linus Torvalds 已提交
1993 1994 1995
	asyctrl_t	actrl;

	portp = tty->driver_data;
A
Alan Cox 已提交
1996
	if (portp == NULL)
L
Linus Torvalds 已提交
1997
		return;
1998
	if (portp->brdnr >= stli_nrbrds)
L
Linus Torvalds 已提交
1999 2000
		return;
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
2001
	if (brdp == NULL)
L
Linus Torvalds 已提交
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
		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).
 */

2026
static int stli_portinfo(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos)
L
Linus Torvalds 已提交
2027
{
A
Alan Cox 已提交
2028 2029
	char *sp, *uart;
	int rc, cnt;
L
Linus Torvalds 已提交
2030 2031 2032 2033 2034 2035

	rc = stli_portcmdstats(portp);

	uart = "UNKNOWN";
	if (brdp->state & BST_STARTED) {
		switch (stli_comstats.hwid) {
A
Alan Cox 已提交
2036 2037 2038
		case 0:	uart = "2681"; break;
		case 1:	uart = "SC26198"; break;
		default:uart = "CD1400"; break;
L
Linus Torvalds 已提交
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088
		}
	}

	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)
{
2089 2090
	struct stlibrd *brdp;
	struct stliport *portp;
2091
	unsigned int brdnr, portnr, totalport;
A
Alan Cox 已提交
2092 2093
	int curoff, maxoff;
	char *pos;
L
Linus Torvalds 已提交
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113

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

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

/*
 *	We scan through for each board, panel and port. The offset is
 *	calculated on the fly, and irrelevant ports are skipped.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
A
Alan Cox 已提交
2114
		if (brdp == NULL)
L
Linus Torvalds 已提交
2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
			continue;
		if (brdp->state == 0)
			continue;

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

		totalport = brdnr * STL_MAXPORTS;
		for (portnr = 0; (portnr < brdp->nrports); portnr++,
		    totalport++) {
			portp = brdp->ports[portnr];
A
Alan Cox 已提交
2129
			if (portp == NULL)
L
Linus Torvalds 已提交
2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155
				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
2156 2157 2158
 *
 *	The caller must hold the brd_lock (see also stli_sendcmd the usual
 *	entry point)
L
Linus Torvalds 已提交
2159 2160
 */

2161
static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
L
Linus Torvalds 已提交
2162
{
A
Alan Cox 已提交
2163 2164 2165 2166
	cdkhdr_t __iomem *hdrp;
	cdkctrl_t __iomem *cp;
	unsigned char __iomem *bits;
	unsigned long flags;
L
Linus Torvalds 已提交
2167

A
Alan Cox 已提交
2168
	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
2169 2170 2171 2172

	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
2173
		spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
2174 2175 2176 2177
		return;
	}

	EBRDENABLE(brdp);
A
Alan Cox 已提交
2178
	cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
L
Linus Torvalds 已提交
2179
	if (size > 0) {
A
Alan Cox 已提交
2180
		memcpy_toio((void __iomem *) &(cp->args[0]), arg, size);
L
Linus Torvalds 已提交
2181 2182 2183 2184 2185
		if (copyback) {
			portp->argp = arg;
			portp->argsize = size;
		}
	}
A
Alan Cox 已提交
2186 2187 2188 2189
	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
2190
		portp->portidx;
A
Alan Cox 已提交
2191
	writeb(readb(bits) | portp->portbit, bits);
L
Linus Torvalds 已提交
2192 2193
	set_bit(ST_CMDING, &portp->state);
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
2194 2195 2196
	spin_unlock_irqrestore(&brd_lock, flags);
}

2197
static void stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback)
A
Alan Cox 已提交
2198 2199 2200 2201 2202 2203
{
	unsigned long		flags;

	spin_lock_irqsave(&brd_lock, flags);
	__stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215
}

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

/*
 *	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.
 */

2216
static void stli_read(struct stlibrd *brdp, struct stliport *portp)
L
Linus Torvalds 已提交
2217
{
A
Alan Cox 已提交
2218 2219
	cdkasyrq_t __iomem *rp;
	char __iomem *shbuf;
L
Linus Torvalds 已提交
2220
	struct tty_struct	*tty;
A
Alan Cox 已提交
2221 2222
	unsigned int head, tail, size;
	unsigned int len, stlen;
L
Linus Torvalds 已提交
2223 2224 2225 2226

	if (test_bit(ST_RXSTOP, &portp->state))
		return;
	tty = portp->tty;
A
Alan Cox 已提交
2227
	if (tty == NULL)
L
Linus Torvalds 已提交
2228 2229
		return;

A
Alan Cox 已提交
2230 2231 2232 2233 2234
	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
2235 2236 2237 2238 2239 2240 2241 2242 2243
	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
2244
	len = tty_buffer_request_room(tty, len);
A
Alan Cox 已提交
2245 2246

	shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset);
L
Linus Torvalds 已提交
2247 2248

	while (len > 0) {
A
Alan Cox 已提交
2249 2250
		unsigned char *cptr;

2251
		stlen = min(len, stlen);
A
Alan Cox 已提交
2252 2253
		tty_prepare_flip_string(tty, &cptr, stlen);
		memcpy_fromio(cptr, shbuf + tail, stlen);
L
Linus Torvalds 已提交
2254 2255 2256 2257 2258 2259 2260
		len -= stlen;
		tail += stlen;
		if (tail >= size) {
			tail = 0;
			stlen = head;
		}
	}
A
Alan Cox 已提交
2261 2262
	rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
	writew(tail, &rp->tail);
L
Linus Torvalds 已提交
2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277

	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.
 */

2278
static void stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp)
L
Linus Torvalds 已提交
2279
{
A
Alan Cox 已提交
2280
	int cmd;
L
Linus Torvalds 已提交
2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294

	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
2295
		memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig,
L
Linus Torvalds 已提交
2296
			sizeof(asysigs_t));
A
Alan Cox 已提交
2297 2298
		writel(0, &cp->status);
		writel(cmd, &cp->cmd);
L
Linus Torvalds 已提交
2299 2300 2301 2302 2303 2304 2305
		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
2306 2307 2308
		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
2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325
		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.
 */

2326
static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp)
L
Linus Torvalds 已提交
2327
{
A
Alan Cox 已提交
2328 2329 2330 2331 2332 2333 2334 2335
	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
2336 2337 2338 2339 2340 2341
	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
2342 2343
		rc = readl(&cp->openarg);
		if (readb(&cp->open) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2344 2345
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2346
			writel(0, &cp->openarg);
L
Linus Torvalds 已提交
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
			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
2357 2358
		rc = (int) readl(&cp->closearg);
		if (readb(&cp->close) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2359 2360
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2361
			writel(0, &cp->closearg);
L
Linus Torvalds 已提交
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372
			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
2373 2374
		rc = readl(&cp->status);
		if (readl(&cp->cmd) == 0 && rc != 0) {
L
Linus Torvalds 已提交
2375 2376
			if (rc > 0)
				rc--;
A
Alan Cox 已提交
2377 2378
			if (portp->argp != NULL) {
				memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]),
L
Linus Torvalds 已提交
2379
					portp->argsize);
A
Alan Cox 已提交
2380
				portp->argp = NULL;
L
Linus Torvalds 已提交
2381
			}
A
Alan Cox 已提交
2382
			writel(0, &cp->status);
L
Linus Torvalds 已提交
2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420
			portp->rc = rc;
			clear_bit(ST_CMDING, &portp->state);
			stli_dodelaycmd(portp, cp);
			wake_up_interruptible(&portp->raw_wait);
		}
	}

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

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

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

		if (nt.data & DT_TXEMPTY)
			clear_bit(ST_TXBUSY, &portp->state);
		if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
A
Alan Cox 已提交
2421 2422 2423
			if (tty != NULL) {
				tty_wakeup(tty);
				EBRDENABLE(brdp);
L
Linus Torvalds 已提交
2424 2425 2426 2427
			}
		}

		if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
A
Alan Cox 已提交
2428
			if (tty != NULL) {
A
Alan Cox 已提交
2429 2430 2431 2432
				tty_insert_flip_char(tty, 0, TTY_BREAK);
				if (portp->flags & ASYNC_SAK) {
					do_SAK(tty);
					EBRDENABLE(brdp);
L
Linus Torvalds 已提交
2433
				}
A
Alan Cox 已提交
2434
				tty_schedule_flip(tty);
L
Linus Torvalds 已提交
2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471
			}
		}

		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.
 */

2472
static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp)
L
Linus Torvalds 已提交
2473
{
2474
	struct stliport *portp;
A
Alan Cox 已提交
2475 2476 2477 2478 2479
	unsigned char hostbits[(STL_MAXCHANS / 8) + 1];
	unsigned char slavebits[(STL_MAXCHANS / 8) + 1];
	unsigned char __iomem *slavep;
	int bitpos, bitat, bitsize;
	int channr, nrdevs, slavebitchange;
L
Linus Torvalds 已提交
2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490

	bitsize = brdp->bitsize;
	nrdevs = brdp->nrdevs;

/*
 *	Check if slave wants any service. Basically we try to do as
 *	little work as possible here. There are 2 levels of service
 *	bits. So if there is nothing to do we bail early. We check
 *	8 service bits at a time in the inner loop, so we can bypass
 *	the lot if none of them want service.
 */
A
Alan Cox 已提交
2491
	memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset),
L
Linus Torvalds 已提交
2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517
		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) {
A
Alan Cox 已提交
2518 2519
		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		slavep = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset;
L
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		for (bitpos = 0; (bitpos < bitsize); bitpos++) {
A
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			if (readb(slavebits + bitpos))
				writeb(readb(slavep + bitpos) & ~slavebits[bitpos], slavebits + bitpos);
L
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		}
	}
}

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

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

static void stli_poll(unsigned long arg)
{
A
Alan Cox 已提交
2540
	cdkhdr_t __iomem *hdrp;
2541
	struct stlibrd *brdp;
2542
	unsigned int brdnr;
L
Linus Torvalds 已提交
2543

2544
	mod_timer(&stli_timerlist, STLI_TIMEOUT);
L
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2545 2546 2547 2548 2549 2550

/*
 *	Check each board and do any servicing required.
 */
	for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
		brdp = stli_brds[brdnr];
A
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		if (brdp == NULL)
L
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2552 2553 2554 2555
			continue;
		if ((brdp->state & BST_STARTED) == 0)
			continue;

A
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2556
		spin_lock(&brd_lock);
L
Linus Torvalds 已提交
2557
		EBRDENABLE(brdp);
A
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2558 2559
		hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
		if (readb(&hdrp->hostreq))
L
Linus Torvalds 已提交
2560 2561
			stli_brdpoll(brdp, hdrp);
		EBRDDISABLE(brdp);
A
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2562
		spin_unlock(&brd_lock);
L
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	}
}

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

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

2573
static void stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp)
L
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{
	memset(pp, 0, sizeof(asyport_t));

/*
 *	Start of by setting the baud, char size, parity and stop bit info.
 */
2580
	pp->baudout = tty_get_baud_rate(portp->tty);
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	if ((tiosp->c_cflag & CBAUD) == B38400) {
		if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
			pp->baudout = 57600;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
			pp->baudout = 115200;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
			pp->baudout = 230400;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
			pp->baudout = 460800;
		else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
			pp->baudout = (portp->baud_base / portp->custom_divisor);
	}
	if (pp->baudout > STL_MAXBAUD)
		pp->baudout = STL_MAXBAUD;
	pp->baudin = pp->baudout;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

static long stli_mktiocm(unsigned long sigvalue)
{
A
Alan Cox 已提交
2705
	long	tiocm = 0;
L
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2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
	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.
 */

2722
static int stli_initports(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2723
{
2724
	struct stliport	*portp;
2725
	unsigned int i, panelnr, panelport;
L
Linus Torvalds 已提交
2726 2727

	for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2728
		portp = kzalloc(sizeof(struct stliport), GFP_KERNEL);
2729
		if (!portp) {
L
Linus Torvalds 已提交
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740
			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;
2741
		INIT_WORK(&portp->tqhangup, stli_dohangup);
L
Linus Torvalds 已提交
2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752
		init_waitqueue_head(&portp->open_wait);
		init_waitqueue_head(&portp->close_wait);
		init_waitqueue_head(&portp->raw_wait);
		panelport++;
		if (panelport >= brdp->panels[panelnr]) {
			panelport = 0;
			panelnr++;
		}
		brdp->ports[i] = portp;
	}

A
Alan Cox 已提交
2753
	return 0;
L
Linus Torvalds 已提交
2754 2755 2756 2757 2758 2759 2760 2761
}

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

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

2762
static void stli_ecpinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776
{
	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));
}

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

2777
static void stli_ecpenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2778 2779 2780 2781 2782 2783
{	
	outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
}

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

2784
static void stli_ecpdisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2785 2786 2787 2788 2789 2790
{	
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
}

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

2791
static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2792
{	
2793
	void __iomem *ptr;
A
Alan Cox 已提交
2794
	unsigned char val;
L
Linus Torvalds 已提交
2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811

	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);
}

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

2812
static void stli_ecpreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2813 2814 2815 2816 2817 2818 2819 2820 2821
{	
	outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
	udelay(10);
	outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
	udelay(500);
}

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

2822
static void stli_ecpintr(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2823 2824 2825 2826 2827 2828 2829 2830 2831 2832
{	
	outb(0x1, brdp->iobase);
}

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

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

2833
static void stli_ecpeiinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850
{
	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));
}

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

2851
static void stli_ecpeienable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2852 2853 2854 2855 2856 2857
{	
	outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
}

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

2858
static void stli_ecpeidisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2859 2860 2861 2862 2863 2864
{	
	outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
}

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

2865
static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2866
{	
2867
	void __iomem *ptr;
L
Linus Torvalds 已提交
2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888
	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);
}

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

2889
static void stli_ecpeireset(struct stlibrd *brdp)
L
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2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902
{	
	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.
 */

2903
static void stli_ecpmcenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2904 2905 2906 2907 2908 2909
{	
	outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
}

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

2910
static void stli_ecpmcdisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2911 2912 2913 2914 2915 2916
{	
	outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
}

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

2917
static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2918
{	
2919
	void __iomem *ptr;
A
Alan Cox 已提交
2920
	unsigned char val;
L
Linus Torvalds 已提交
2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937

	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);
}

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

2938
static void stli_ecpmcreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951
{	
	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.
 */

2952
static void stli_ecppciinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2953 2954 2955 2956 2957 2958 2959 2960 2961
{
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

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

2962
static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
2963
{	
2964
	void __iomem *ptr;
L
Linus Torvalds 已提交
2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982
	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);
}

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

2983
static void stli_ecppcireset(struct stlibrd *brdp)
L
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2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996
{	
	outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR));
	udelay(10);
	outb(0, (brdp->iobase + ECP_PCICONFR));
	udelay(500);
}

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

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

2997
static void stli_onbinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013
{
	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);
}

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

3014
static void stli_onbenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3015 3016 3017 3018 3019 3020
{	
	outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR));
}

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

3021
static void stli_onbdisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3022 3023 3024 3025 3026 3027
{	
	outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR));
}

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

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

	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);
}

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

3045
static void stli_onbreset(struct stlibrd *brdp)
L
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3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058
{	
	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.
 */

3059
static void stli_onbeinit(struct stlibrd *brdp)
L
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3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078
{
	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);
}

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

3079
static void stli_onbeenable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3080 3081 3082 3083 3084 3085
{	
	outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
}

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

3086
static void stli_onbedisable(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3087 3088 3089 3090 3091 3092
{	
	outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
}

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

3093
static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3094
{	
3095
	void __iomem *ptr;
A
Alan Cox 已提交
3096
	unsigned char val;
L
Linus Torvalds 已提交
3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116

	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);
}

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

3117
static void stli_onbereset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130
{	
	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.
 */

3131
static void stli_bbyinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142
{
	outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
	udelay(10);
	outb(0, (brdp->iobase + BBY_ATCONFR));
	mdelay(1000);
	outb(0x1, brdp->iobase);
	mdelay(1);
}

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

3143
static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3144
{	
3145
	void __iomem *ptr;
A
Alan Cox 已提交
3146
	unsigned char val;
L
Linus Torvalds 已提交
3147

A
Alan Cox 已提交
3148
	BUG_ON(offset > brdp->memsize);
L
Linus Torvalds 已提交
3149

A
Alan Cox 已提交
3150 3151
	ptr = brdp->membase + (offset % BBY_PAGESIZE);
	val = (unsigned char) (offset / BBY_PAGESIZE);
L
Linus Torvalds 已提交
3152 3153 3154 3155 3156 3157
	outb(val, (brdp->iobase + BBY_ATCONFR));
	return(ptr);
}

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

3158
static void stli_bbyreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171
{	
	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.
 */

3172
static void stli_stalinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3173 3174 3175 3176 3177 3178 3179
{
	outb(0x1, brdp->iobase);
	mdelay(1000);
}

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

3180
static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line)
L
Linus Torvalds 已提交
3181
{	
A
Alan Cox 已提交
3182 3183
	BUG_ON(offset > brdp->memsize);
	return brdp->membase + (offset % STAL_PAGESIZE);
L
Linus Torvalds 已提交
3184 3185 3186 3187
}

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

3188
static void stli_stalreset(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3189
{	
A
Alan Cox 已提交
3190
	u32 __iomem *vecp;
L
Linus Torvalds 已提交
3191

A
Alan Cox 已提交
3192 3193
	vecp = (u32 __iomem *) (brdp->membase + 0x30);
	writel(0xffff0000, vecp);
L
Linus Torvalds 已提交
3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204
	outb(0, brdp->iobase);
	mdelay(1000);
}

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

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

3205
static int stli_initecp(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3206
{
A
Alan Cox 已提交
3207 3208 3209 3210
	cdkecpsig_t sig;
	cdkecpsig_t __iomem *sigsp;
	unsigned int status, nxtid;
	char *name;
3211
	int retval, panelnr, nrports;
L
Linus Torvalds 已提交
3212

3213 3214 3215 3216 3217 3218 3219 3220
	if ((brdp->iobase == 0) || (brdp->memaddr == 0)) {
		retval = -ENODEV;
		goto err;
	}

	if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
		retval = -EIO;
		goto err;
L
Linus Torvalds 已提交
3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283
	}

	brdp->iosize = ECP_IOSIZE;

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

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

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

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

	default:
3284 3285
		retval = -EINVAL;
		goto err_reg;
L
Linus Torvalds 已提交
3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296
	}

/*
 *	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);
3297 3298 3299
	if (brdp->membase == NULL) {
		retval = -ENOMEM;
		goto err_reg;
L
Linus Torvalds 已提交
3300 3301 3302 3303 3304 3305 3306 3307
	}

/*
 *	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
3308
	sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3309
	memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t));
L
Linus Torvalds 已提交
3310 3311
	EBRDDISABLE(brdp);

3312 3313 3314
	if (sig.magic != cpu_to_le32(ECP_MAGIC)) {
		retval = -ENODEV;
		goto err_unmap;
L
Linus Torvalds 已提交
3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337
	}

/*
 *	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
3338
	return 0;
3339 3340 3341 3342 3343 3344 3345
err_unmap:
	iounmap(brdp->membase);
	brdp->membase = NULL;
err_reg:
	release_region(brdp->iobase, brdp->iosize);
err:
	return retval;
L
Linus Torvalds 已提交
3346 3347 3348 3349 3350 3351 3352 3353 3354
}

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

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

3355
static int stli_initonb(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3356
{
A
Alan Cox 已提交
3357 3358 3359
	cdkonbsig_t sig;
	cdkonbsig_t __iomem *sigsp;
	char *name;
3360
	int i, retval;
L
Linus Torvalds 已提交
3361 3362 3363 3364

/*
 *	Do a basic sanity check on the IO and memory addresses.
 */
3365 3366 3367 3368
	if (brdp->iobase == 0 || brdp->memaddr == 0) {
		retval = -ENODEV;
		goto err;
	}
L
Linus Torvalds 已提交
3369 3370 3371

	brdp->iosize = ONB_IOSIZE;
	
3372 3373 3374 3375
	if (!request_region(brdp->iobase, brdp->iosize, "istallion")) {
		retval = -EIO;
		goto err;
	}
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 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

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

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

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

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

	default:
3441 3442
		retval = -EINVAL;
		goto err_reg;
L
Linus Torvalds 已提交
3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453
	}

/*
 *	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);
3454 3455 3456
	if (brdp->membase == NULL) {
		retval = -ENOMEM;
		goto err_reg;
L
Linus Torvalds 已提交
3457 3458 3459 3460 3461 3462 3463 3464
	}

/*
 *	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
3465 3466
	sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
	memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t));
L
Linus Torvalds 已提交
3467 3468
	EBRDDISABLE(brdp);

A
Alan Cox 已提交
3469 3470 3471
	if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) ||
	    sig.magic1 != cpu_to_le16(ONB_MAGIC1) ||
	    sig.magic2 != cpu_to_le16(ONB_MAGIC2) ||
3472 3473 3474
	    sig.magic3 != cpu_to_le16(ONB_MAGIC3)) {
		retval = -ENODEV;
		goto err_unmap;
L
Linus Torvalds 已提交
3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494
	}

/*
 *	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
3495
	return 0;
3496 3497 3498 3499 3500 3501 3502
err_unmap:
	iounmap(brdp->membase);
	brdp->membase = NULL;
err_reg:
	release_region(brdp->iobase, brdp->iosize);
err:
	return retval;
L
Linus Torvalds 已提交
3503 3504 3505 3506 3507 3508 3509 3510 3511 3512
}

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

/*
 *	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...
 */

3513
static int stli_startbrd(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3514
{
A
Alan Cox 已提交
3515 3516 3517 3518
	cdkhdr_t __iomem *hdrp;
	cdkmem_t __iomem *memp;
	cdkasy_t __iomem *ap;
	unsigned long flags;
3519
	unsigned int portnr, nrdevs, i;
3520
	struct stliport *portp;
3521
	int rc = 0;
A
Alan Cox 已提交
3522 3523 3524
	u32 memoff;

	spin_lock_irqsave(&brd_lock, flags);
L
Linus Torvalds 已提交
3525
	EBRDENABLE(brdp);
A
Alan Cox 已提交
3526
	hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
L
Linus Torvalds 已提交
3527 3528 3529 3530 3531
	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
3532 3533 3534
		 __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
3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545
#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
3546 3547
	memoff = readl(&hdrp->memp);
	if (memoff > brdp->memsize) {
L
Linus Torvalds 已提交
3548 3549 3550 3551
		printk(KERN_ERR "STALLION: corrupted shared memory region?\n");
		rc = -EIO;
		goto stli_donestartup;
	}
A
Alan Cox 已提交
3552 3553
	memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff);
	if (readw(&memp->dtype) != TYP_ASYNCTRL) {
L
Linus Torvalds 已提交
3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564
		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
3565
		if (readw(&memp->dtype) != TYP_ASYNC)
L
Linus Torvalds 已提交
3566 3567
			break;
		portp = brdp->ports[portnr];
A
Alan Cox 已提交
3568
		if (portp == NULL)
L
Linus Torvalds 已提交
3569 3570
			break;
		portp->devnr = i;
A
Alan Cox 已提交
3571
		portp->addr = readl(&memp->offset);
L
Linus Torvalds 已提交
3572 3573 3574 3575 3576
		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
3577
	writeb(0xff, &hdrp->slavereq);
L
Linus Torvalds 已提交
3578 3579 3580 3581 3582 3583 3584 3585

/*
 *	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
3586
		if (portp == NULL)
L
Linus Torvalds 已提交
3587 3588 3589
			break;
		if (portp->addr == 0)
			break;
A
Alan Cox 已提交
3590 3591 3592 3593 3594 3595
		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
3596 3597 3598 3599 3600
		}
	}

stli_donestartup:
	EBRDDISABLE(brdp);
A
Alan Cox 已提交
3601
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
3602 3603 3604 3605 3606 3607

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

	if (! stli_timeron) {
		stli_timeron++;
3608
		mod_timer(&stli_timerlist, STLI_TIMEOUT);
L
Linus Torvalds 已提交
3609 3610
	}

A
Alan Cox 已提交
3611
	return rc;
L
Linus Torvalds 已提交
3612 3613 3614 3615 3616 3617 3618 3619
}

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

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

3620
static int __devinit stli_brdinit(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3621
{
3622 3623
	int retval;

L
Linus Torvalds 已提交
3624 3625 3626 3627 3628
	switch (brdp->brdtype) {
	case BRD_ECP:
	case BRD_ECPE:
	case BRD_ECPMC:
	case BRD_ECPPCI:
3629
		retval = stli_initecp(brdp);
L
Linus Torvalds 已提交
3630 3631 3632 3633 3634 3635
		break;
	case BRD_ONBOARD:
	case BRD_ONBOARDE:
	case BRD_ONBOARD2:
	case BRD_BRUMBY4:
	case BRD_STALLION:
3636
		retval = stli_initonb(brdp);
L
Linus Torvalds 已提交
3637 3638 3639 3640
		break;
	default:
		printk(KERN_ERR "STALLION: board=%d is unknown board "
				"type=%d\n", brdp->brdnr, brdp->brdtype);
3641
		retval = -ENODEV;
L
Linus Torvalds 已提交
3642 3643
	}

3644 3645
	if (retval)
		return retval;
L
Linus Torvalds 已提交
3646 3647 3648 3649 3650 3651

	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
3652
	return 0;
L
Linus Torvalds 已提交
3653 3654
}

3655
#if STLI_EISAPROBE != 0
L
Linus Torvalds 已提交
3656 3657 3658 3659 3660 3661 3662
/*****************************************************************************/

/*
 *	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.
 */

3663
static int stli_eisamemprobe(struct stlibrd *brdp)
L
Linus Torvalds 已提交
3664
{
A
Alan Cox 已提交
3665 3666
	cdkecpsig_t	ecpsig, __iomem *ecpsigp;
	cdkonbsig_t	onbsig, __iomem *onbsigp;
L
Linus Torvalds 已提交
3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691
	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
3692
		return -ENODEV;
L
Linus Torvalds 已提交
3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704
	}

	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
3705
		if (brdp->membase == NULL)
L
Linus Torvalds 已提交
3706 3707 3708
			continue;

		if (brdp->brdtype == BRD_ECPE) {
3709
			ecpsigp = stli_ecpeigetmemptr(brdp,
L
Linus Torvalds 已提交
3710
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3711 3712
			memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
			if (ecpsig.magic == cpu_to_le32(ECP_MAGIC))
L
Linus Torvalds 已提交
3713 3714
				foundit = 1;
		} else {
A
Alan Cox 已提交
3715
			onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp,
L
Linus Torvalds 已提交
3716
				CDK_SIGADDR, __LINE__);
A
Alan Cox 已提交
3717 3718 3719 3720 3721
			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
3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744
				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
3745
		return -ENODEV;
L
Linus Torvalds 已提交
3746
	}
A
Alan Cox 已提交
3747
	return 0;
L
Linus Torvalds 已提交
3748
}
3749
#endif
L
Linus Torvalds 已提交
3750 3751 3752

static int stli_getbrdnr(void)
{
3753
	unsigned int i;
L
Linus Torvalds 已提交
3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764

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

3765
#if STLI_EISAPROBE != 0
L
Linus Torvalds 已提交
3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779
/*****************************************************************************/

/*
 *	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)
{
3780
	struct stlibrd *brdp;
3781
	unsigned int iobase, eid, i;
3782
	int brdnr, found = 0;
L
Linus Torvalds 已提交
3783 3784

/*
A
Alan Cox 已提交
3785
 *	Firstly check if this is an EISA system.  If this is not an EISA system then
L
Linus Torvalds 已提交
3786 3787
 *	don't bother going any further!
 */
A
Alan Cox 已提交
3788 3789
	if (EISA_bus)
		return 0;
L
Linus Torvalds 已提交
3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806

/*
 *	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
3807
			if (brdp == NULL)
L
Linus Torvalds 已提交
3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818
				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
3819
		if ((brdp = stli_allocbrd()) == NULL)
3820
			return found ? : -ENOMEM;
3821 3822
		brdnr = stli_getbrdnr();
		if (brdnr < 0)
3823
			return found ? : -ENOMEM;
3824
		brdp->brdnr = (unsigned int)brdnr;
L
Linus Torvalds 已提交
3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835
		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));
3836 3837 3838 3839 3840
		if (stli_brdinit(brdp) < 0) {
			kfree(brdp);
			continue;
		}

3841
		stli_brds[brdp->brdnr] = brdp;
3842
		found++;
3843 3844 3845 3846

		for (i = 0; i < brdp->nrports; i++)
			tty_register_device(stli_serial,
					brdp->brdnr * STL_MAXPORTS + i, NULL);
L
Linus Torvalds 已提交
3847 3848
	}

3849
	return found;
L
Linus Torvalds 已提交
3850
}
3851 3852 3853
#else
static inline int stli_findeisabrds(void) { return 0; }
#endif
L
Linus Torvalds 已提交
3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868

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

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

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

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

3869 3870
static int __devinit stli_pciprobe(struct pci_dev *pdev,
		const struct pci_device_id *ent)
L
Linus Torvalds 已提交
3871
{
3872
	struct stlibrd *brdp;
3873
	unsigned int i;
3874
	int brdnr, retval = -EIO;
3875 3876 3877 3878 3879 3880 3881 3882 3883

	retval = pci_enable_device(pdev);
	if (retval)
		goto err;
	brdp = stli_allocbrd();
	if (brdp == NULL) {
		retval = -ENOMEM;
		goto err;
	}
3884
	mutex_lock(&stli_brdslock);
3885
	brdnr = stli_getbrdnr();
3886
	if (brdnr < 0) {
L
Linus Torvalds 已提交
3887 3888
		printk(KERN_INFO "STALLION: too many boards found, "
			"maximum supported %d\n", STL_MAXBRDS);
3889
		mutex_unlock(&stli_brdslock);
3890 3891
		retval = -EIO;
		goto err_fr;
L
Linus Torvalds 已提交
3892
	}
3893
	brdp->brdnr = (unsigned int)brdnr;
3894 3895
	stli_brds[brdp->brdnr] = brdp;
	mutex_unlock(&stli_brdslock);
3896
	brdp->brdtype = BRD_ECPPCI;
L
Linus Torvalds 已提交
3897 3898 3899 3900
/*
 *	We have all resources from the board, so lets setup the actual
 *	board structure now.
 */
3901 3902 3903 3904
	brdp->iobase = pci_resource_start(pdev, 3);
	brdp->memaddr = pci_resource_start(pdev, 2);
	retval = stli_brdinit(brdp);
	if (retval)
3905
		goto err_null;
3906

3907
	brdp->state |= BST_PROBED;
3908
	pci_set_drvdata(pdev, brdp);
L
Linus Torvalds 已提交
3909

J
Jiri Slaby 已提交
3910 3911 3912 3913
	EBRDENABLE(brdp);
	brdp->enable = NULL;
	brdp->disable = NULL;

3914 3915 3916 3917
	for (i = 0; i < brdp->nrports; i++)
		tty_register_device(stli_serial, brdp->brdnr * STL_MAXPORTS + i,
				&pdev->dev);

A
Alan Cox 已提交
3918
	return 0;
3919 3920
err_null:
	stli_brds[brdp->brdnr] = NULL;
3921 3922 3923 3924
err_fr:
	kfree(brdp);
err:
	return retval;
L
Linus Torvalds 已提交
3925 3926
}

3927 3928
static void stli_pciremove(struct pci_dev *pdev)
{
3929
	struct stlibrd *brdp = pci_get_drvdata(pdev);
L
Linus Torvalds 已提交
3930

3931
	stli_cleanup_ports(brdp);
L
Linus Torvalds 已提交
3932

3933 3934 3935
	iounmap(brdp->membase);
	if (brdp->iosize > 0)
		release_region(brdp->iobase, brdp->iosize);
L
Linus Torvalds 已提交
3936

3937 3938
	stli_brds[brdp->brdnr] = NULL;
	kfree(brdp);
L
Linus Torvalds 已提交
3939 3940
}

3941 3942 3943 3944 3945 3946
static struct pci_driver stli_pcidriver = {
	.name = "istallion",
	.id_table = istallion_pci_tbl,
	.probe = stli_pciprobe,
	.remove = __devexit_p(stli_pciremove)
};
L
Linus Torvalds 已提交
3947 3948 3949 3950 3951 3952
/*****************************************************************************/

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

3953
static struct stlibrd *stli_allocbrd(void)
L
Linus Torvalds 已提交
3954
{
3955
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
3956

3957
	brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL);
3958
	if (!brdp) {
L
Linus Torvalds 已提交
3959
		printk(KERN_ERR "STALLION: failed to allocate memory "
3960
				"(size=%Zd)\n", sizeof(struct stlibrd));
3961
		return NULL;
L
Linus Torvalds 已提交
3962 3963
	}
	brdp->magic = STLI_BOARDMAGIC;
A
Alan Cox 已提交
3964
	return brdp;
L
Linus Torvalds 已提交
3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975
}

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

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

static int stli_initbrds(void)
{
3976 3977
	struct stlibrd *brdp, *nxtbrdp;
	struct stlconf conf;
3978
	unsigned int i, j, found = 0;
3979
	int retval;
L
Linus Torvalds 已提交
3980

3981 3982 3983 3984 3985
	for (stli_nrbrds = 0; stli_nrbrds < ARRAY_SIZE(stli_brdsp);
			stli_nrbrds++) {
		memset(&conf, 0, sizeof(conf));
		if (stli_parsebrd(&conf, stli_brdsp[stli_nrbrds]) == 0)
			continue;
A
Alan Cox 已提交
3986
		if ((brdp = stli_allocbrd()) == NULL)
3987 3988 3989 3990 3991
			continue;
		brdp->brdnr = stli_nrbrds;
		brdp->brdtype = conf.brdtype;
		brdp->iobase = conf.ioaddr1;
		brdp->memaddr = conf.memaddr;
3992 3993 3994 3995
		if (stli_brdinit(brdp) < 0) {
			kfree(brdp);
			continue;
		}
3996
		stli_brds[brdp->brdnr] = brdp;
3997
		found++;
3998 3999 4000 4001

		for (i = 0; i < brdp->nrports; i++)
			tty_register_device(stli_serial,
					brdp->brdnr * STL_MAXPORTS + i, NULL);
L
Linus Torvalds 已提交
4002 4003
	}

4004 4005 4006
	retval = stli_findeisabrds();
	if (retval > 0)
		found += retval;
4007

L
Linus Torvalds 已提交
4008 4009 4010 4011 4012 4013 4014 4015 4016
/*
 *	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
4017
			if (brdp == NULL)
L
Linus Torvalds 已提交
4018 4019 4020
				continue;
			for (j = i + 1; (j < stli_nrbrds); j++) {
				nxtbrdp = stli_brds[j];
A
Alan Cox 已提交
4021
				if (nxtbrdp == NULL)
L
Linus Torvalds 已提交
4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035
					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
4036
			if (brdp == NULL)
L
Linus Torvalds 已提交
4037 4038 4039 4040 4041 4042 4043 4044 4045
				continue;
			if (brdp->state & BST_FOUND) {
				EBRDENABLE(brdp);
				brdp->enable = NULL;
				brdp->disable = NULL;
			}
		}
	}

J
Jiri Slaby 已提交
4046 4047 4048 4049 4050 4051 4052
	retval = pci_register_driver(&stli_pcidriver);
	if (retval && found == 0) {
		printk(KERN_ERR "Neither isa nor eisa cards found nor pci "
				"driver can be registered!\n");
		goto err;
	}

A
Alan Cox 已提交
4053
	return 0;
4054 4055
err:
	return retval;
L
Linus Torvalds 已提交
4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
}

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

/*
 *	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
4068
	unsigned long flags;
4069
	void __iomem *memptr;
4070
	struct stlibrd *brdp;
4071 4072
	unsigned int brdnr;
	int size, n;
A
Alan Cox 已提交
4073 4074
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4075

4076
	brdnr = iminor(fp->f_path.dentry->d_inode);
L
Linus Torvalds 已提交
4077
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4078
		return -ENODEV;
L
Linus Torvalds 已提交
4079
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4080 4081
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4082
	if (brdp->state == 0)
A
Alan Cox 已提交
4083 4084 4085
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4086

4087
	size = min(count, (size_t)(brdp->memsize - off));
A
Alan Cox 已提交
4088 4089 4090 4091 4092 4093 4094 4095

	/*
	 *	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
4096 4097

	while (size > 0) {
A
Alan Cox 已提交
4098 4099
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
4100
		memptr = EBRDGETMEMPTR(brdp, off);
4101 4102
		n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = min(n, (int)PAGE_SIZE);
A
Alan Cox 已提交
4103 4104 4105 4106
		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
4107 4108 4109
			count = -EFAULT;
			goto out;
		}
A
Alan Cox 已提交
4110
		off += n;
L
Linus Torvalds 已提交
4111 4112 4113 4114
		buf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4115 4116 4117
	*offp = off;
	free_page((unsigned long)p);
	return count;
L
Linus Torvalds 已提交
4118 4119 4120 4121 4122 4123 4124 4125
}

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

/*
 *	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
4126 4127
 *
 *	FIXME: copy under lock
L
Linus Torvalds 已提交
4128 4129 4130 4131
 */

static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp)
{
A
Alan Cox 已提交
4132
	unsigned long flags;
4133
	void __iomem *memptr;
4134
	struct stlibrd *brdp;
A
Alan Cox 已提交
4135
	char __user *chbuf;
4136 4137
	unsigned int brdnr;
	int size, n;
A
Alan Cox 已提交
4138 4139
	void *p;
	loff_t off = *offp;
L
Linus Torvalds 已提交
4140

4141
	brdnr = iminor(fp->f_path.dentry->d_inode);
A
Alan Cox 已提交
4142

L
Linus Torvalds 已提交
4143
	if (brdnr >= stli_nrbrds)
A
Alan Cox 已提交
4144
		return -ENODEV;
L
Linus Torvalds 已提交
4145
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4146 4147
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4148
	if (brdp->state == 0)
A
Alan Cox 已提交
4149 4150 4151
		return -ENODEV;
	if (off >= brdp->memsize || off + count < off)
		return 0;
L
Linus Torvalds 已提交
4152 4153

	chbuf = (char __user *) buf;
4154
	size = min(count, (size_t)(brdp->memsize - off));
A
Alan Cox 已提交
4155 4156 4157 4158 4159 4160 4161 4162

	/*
	 *	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
4163 4164

	while (size > 0) {
4165 4166
		n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize)));
		n = min(n, (int)PAGE_SIZE);
A
Alan Cox 已提交
4167 4168 4169
		if (copy_from_user(p, chbuf, n)) {
			if (count == 0)
				count = -EFAULT;
L
Linus Torvalds 已提交
4170 4171
			goto out;
		}
A
Alan Cox 已提交
4172 4173
		spin_lock_irqsave(&brd_lock, flags);
		EBRDENABLE(brdp);
4174
		memptr = EBRDGETMEMPTR(brdp, off);
A
Alan Cox 已提交
4175 4176 4177 4178
		memcpy_toio(memptr, p, n);
		EBRDDISABLE(brdp);
		spin_unlock_irqrestore(&brd_lock, flags);
		off += n;
L
Linus Torvalds 已提交
4179 4180 4181 4182
		chbuf += n;
		size -= n;
	}
out:
A
Alan Cox 已提交
4183 4184 4185
	free_page((unsigned long) p);
	*offp = off;
	return count;
L
Linus Torvalds 已提交
4186 4187 4188 4189 4190 4191 4192 4193 4194 4195
}

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

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

static int stli_getbrdstats(combrd_t __user *bp)
{
4196
	struct stlibrd *brdp;
4197
	unsigned int i;
L
Linus Torvalds 已提交
4198 4199 4200 4201

	if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t)))
		return -EFAULT;
	if (stli_brdstats.brd >= STL_MAXBRDS)
A
Alan Cox 已提交
4202
		return -ENODEV;
L
Linus Torvalds 已提交
4203
	brdp = stli_brds[stli_brdstats.brd];
A
Alan Cox 已提交
4204 4205
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223

	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
4224
	return 0;
L
Linus Torvalds 已提交
4225 4226 4227 4228 4229 4230 4231 4232
}

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

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

4233 4234
static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr,
		unsigned int portnr)
L
Linus Torvalds 已提交
4235
{
4236
	struct stlibrd *brdp;
4237
	unsigned int i;
L
Linus Torvalds 已提交
4238

4239
	if (brdnr >= STL_MAXBRDS)
A
Alan Cox 已提交
4240
		return NULL;
L
Linus Torvalds 已提交
4241
	brdp = stli_brds[brdnr];
A
Alan Cox 已提交
4242 4243
	if (brdp == NULL)
		return NULL;
L
Linus Torvalds 已提交
4244 4245
	for (i = 0; (i < panelnr); i++)
		portnr += brdp->panels[i];
4246
	if (portnr >= brdp->nrports)
A
Alan Cox 已提交
4247 4248
		return NULL;
	return brdp->ports[portnr];
L
Linus Torvalds 已提交
4249 4250 4251 4252 4253 4254 4255 4256 4257 4258
}

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

/*
 *	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).
 */

4259
static int stli_portcmdstats(struct stliport *portp)
L
Linus Torvalds 已提交
4260 4261
{
	unsigned long	flags;
4262
	struct stlibrd	*brdp;
L
Linus Torvalds 已提交
4263 4264 4265 4266
	int		rc;

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

A
Alan Cox 已提交
4267 4268
	if (portp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4269
	brdp = stli_brds[portp->brdnr];
A
Alan Cox 已提交
4270 4271
	if (brdp == NULL)
		return -ENODEV;
L
Linus Torvalds 已提交
4272 4273 4274 4275

	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
4276
			return rc;
L
Linus Torvalds 已提交
4277 4278 4279 4280 4281 4282 4283 4284 4285 4286
	} 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
4287 4288
	spin_lock_irqsave(&brd_lock, flags);
	if (portp->tty != NULL) {
L
Linus Torvalds 已提交
4289 4290
		if (portp->tty->driver_data == portp) {
			stli_comstats.ttystate = portp->tty->flags;
A
Alan Cox 已提交
4291 4292
			stli_comstats.rxbuffered = -1;
			if (portp->tty->termios != NULL) {
L
Linus Torvalds 已提交
4293 4294 4295 4296 4297 4298 4299
				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
4300
	spin_unlock_irqrestore(&brd_lock, flags);
L
Linus Torvalds 已提交
4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321

	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
4322
	return 0;
L
Linus Torvalds 已提交
4323 4324 4325 4326 4327 4328 4329 4330 4331 4332
}

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

/*
 *	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).
 */

4333
static int stli_getportstats(struct stliport *portp, comstats_t __user *cp)
L
Linus Torvalds 已提交
4334
{
4335
	struct stlibrd *brdp;
A
Alan Cox 已提交
4336
	int rc;
L
Linus Torvalds 已提交
4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361 4362 4363

	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...
 */

4364
static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp)
L
Linus Torvalds 已提交
4365
{
4366
	struct stlibrd *brdp;
A
Alan Cox 已提交
4367
	int rc;
L
Linus Torvalds 已提交
4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402

	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.
 */

4403
static int stli_getportstruct(struct stliport __user *arg)
L
Linus Torvalds 已提交
4404
{
4405
	struct stliport stli_dummyport;
4406
	struct stliport *portp;
L
Linus Torvalds 已提交
4407

4408
	if (copy_from_user(&stli_dummyport, arg, sizeof(struct stliport)))
L
Linus Torvalds 已提交
4409 4410 4411 4412 4413
		return -EFAULT;
	portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr,
		 stli_dummyport.portnr);
	if (!portp)
		return -ENODEV;
4414
	if (copy_to_user(arg, portp, sizeof(struct stliport)))
L
Linus Torvalds 已提交
4415 4416 4417 4418 4419 4420 4421 4422 4423 4424
		return -EFAULT;
	return 0;
}

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

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

4425
static int stli_getbrdstruct(struct stlibrd __user *arg)
L
Linus Torvalds 已提交
4426
{
4427
	struct stlibrd stli_dummybrd;
4428
	struct stlibrd *brdp;
L
Linus Torvalds 已提交
4429

4430
	if (copy_from_user(&stli_dummybrd, arg, sizeof(struct stlibrd)))
L
Linus Torvalds 已提交
4431
		return -EFAULT;
4432
	if (stli_dummybrd.brdnr >= STL_MAXBRDS)
L
Linus Torvalds 已提交
4433 4434 4435 4436
		return -ENODEV;
	brdp = stli_brds[stli_dummybrd.brdnr];
	if (!brdp)
		return -ENODEV;
4437
	if (copy_to_user(arg, brdp, sizeof(struct stlibrd)))
L
Linus Torvalds 已提交
4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451
		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)
{
4452
	struct stlibrd *brdp;
A
Alan Cox 已提交
4453
	int brdnr, rc, done;
L
Linus Torvalds 已提交
4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485
	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
4486
		return rc;
L
Linus Torvalds 已提交
4487 4488 4489 4490 4491 4492 4493

/*
 *	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
4494
		return -ENODEV;
L
Linus Torvalds 已提交
4495 4496
	brdp = stli_brds[brdnr];
	if (!brdp)
A
Alan Cox 已提交
4497
		return -ENODEV;
L
Linus Torvalds 已提交
4498
	if (brdp->state == 0)
A
Alan Cox 已提交
4499
		return -ENODEV;
L
Linus Torvalds 已提交
4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522

	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
4523
	return rc;
L
Linus Torvalds 已提交
4524 4525
}

J
Jeff Dike 已提交
4526
static const struct tty_operations stli_ops = {
L
Linus Torvalds 已提交
4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550
	.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,
};

/*****************************************************************************/
4551 4552 4553
/*
 *	Loadable module initialization stuff.
 */
L
Linus Torvalds 已提交
4554

4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573
static void istallion_cleanup_isa(void)
{
	struct stlibrd	*brdp;
	unsigned int j;

	for (j = 0; (j < stli_nrbrds); j++) {
		if ((brdp = stli_brds[j]) == NULL || (brdp->state & BST_PROBED))
			continue;

		stli_cleanup_ports(brdp);

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

4574
static int __init istallion_module_init(void)
L
Linus Torvalds 已提交
4575
{
4576 4577
	unsigned int i;
	int retval;
4578

L
Linus Torvalds 已提交
4579 4580
	printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion);

A
Alan Cox 已提交
4581 4582 4583
	spin_lock_init(&stli_lock);
	spin_lock_init(&brd_lock);

4584
	stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL);
4585
	if (!stli_txcookbuf) {
L
Linus Torvalds 已提交
4586 4587
		printk(KERN_ERR "STALLION: failed to allocate memory "
				"(size=%d)\n", STLI_TXBUFSIZE);
4588 4589 4590
		retval = -ENOMEM;
		goto err;
	}
L
Linus Torvalds 已提交
4591

4592 4593 4594 4595 4596
	stli_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
	if (!stli_serial) {
		retval = -ENOMEM;
		goto err_free;
	}
L
Linus Torvalds 已提交
4597 4598 4599 4600 4601 4602 4603 4604 4605

	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;
4606
	stli_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
L
Linus Torvalds 已提交
4607 4608
	tty_set_operations(stli_serial, &stli_ops);

4609 4610
	retval = tty_register_driver(stli_serial);
	if (retval) {
L
Linus Torvalds 已提交
4611
		printk(KERN_ERR "STALLION: failed to register serial driver\n");
4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627
		goto err_ttyput;
	}

	retval = stli_initbrds();
	if (retval)
		goto err_ttyunr;

/*
 *	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.
 */
	retval = register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem);
	if (retval) {
		printk(KERN_ERR "STALLION: failed to register serial memory "
				"device\n");
		goto err_deinit;
L
Linus Torvalds 已提交
4628
	}
4629 4630 4631 4632 4633 4634 4635

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

A
Alan Cox 已提交
4636
	return 0;
4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647
err_deinit:
	pci_unregister_driver(&stli_pcidriver);
	istallion_cleanup_isa();
err_ttyunr:
	tty_unregister_driver(stli_serial);
err_ttyput:
	put_tty_driver(stli_serial);
err_free:
	kfree(stli_txcookbuf);
err:
	return retval;
L
Linus Torvalds 已提交
4648 4649 4650
}

/*****************************************************************************/
4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663

static void __exit istallion_module_exit(void)
{
	unsigned int j;

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

	if (stli_timeron) {
		stli_timeron = 0;
		del_timer_sync(&stli_timerlist);
	}

4664 4665
	unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");

4666
	for (j = 0; j < 4; j++)
4667 4668
		class_device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR,
					j));
4669 4670
	class_destroy(istallion_class);

4671 4672
	pci_unregister_driver(&stli_pcidriver);
	istallion_cleanup_isa();
4673

4674 4675
	tty_unregister_driver(stli_serial);
	put_tty_driver(stli_serial);
4676

4677
	kfree(stli_txcookbuf);
4678 4679 4680 4681
}

module_init(istallion_module_init);
module_exit(istallion_module_exit);