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istallion.c：源码内容

/*****************************************************************************/
/*
* istallion.c -- stallion intelligent multiport serial driver.
*
*
* This code is loosely based on the Linux serial driver, written by
* Linus Torvalds, Theodore T'so and others.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*****************************************************************************/
#include <linux/config.h>
#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/version.h>
#include <linux/istallion.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/devfs_fs_kernel.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
/*****************************************************************************/
/*
* Define different board types. Not all of the following board types
* are supported by this driver. But I will use the standard "assigned"
* board numbers. Currently supported boards are abbreviated as:
* ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
* STAL = Stallion.
*/
#define BRD_UNKNOWN 0
#define BRD_STALLION 1
#define BRD_BRUMBY4 2
#define BRD_ONBOARD2 3
#define BRD_ONBOARD 4
#define BRD_BRUMBY8 5
#define BRD_BRUMBY16 6
#define BRD_ONBOARDE 7
#define BRD_ONBOARD32 9
#define BRD_ONBOARD2_32 10
#define BRD_ONBOARDRS 11
#define BRD_EASYIO 20
#define BRD_ECH 21
#define BRD_ECHMC 22
#define BRD_ECP 23
#define BRD_ECPE 24
#define BRD_ECPMC 25
#define BRD_ECHPCI 26
#define BRD_ECH64PCI 27
#define BRD_EASYIOPCI 28
#define BRD_ECPPCI 29
#define BRD_BRUMBY BRD_BRUMBY4
/*
* Define a configuration structure to hold the board configuration.
* Need to set this up in the code (for now) with the boards that are
* to be configured into the system. This is what needs to be modified
* when adding/removing/modifying boards. Each line entry in the
* stli_brdconf[] array is a board. Each line contains io/irq/memory
* ranges for that board (as well as what type of board it is).
* Some examples:
* { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
* This line will configure an EasyConnection 8/64 at io address 2a0,
* and shared memory address of cc000. Multiple EasyConnection 8/64
* boards can share the same shared memory address space. No interrupt
* is required for this board type.
* Another example:
* { BRD_ECPE, 0x5000, 0, 0x80000000, 0, 0 },
* This line will configure an EasyConnection 8/64 EISA in slot 5 and
* shared memory address of 0x80000000 (2 GByte). Multiple
* EasyConnection 8/64 EISA boards can share the same shared memory
* address space. No interrupt is required for this board type.
* Another example:
* { BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
* This line will configure an ONboard (ISA type) at io address 240,
* and shared memory address of d0000. Multiple ONboards can share
* the same shared memory address space. No interrupt required.
* Another example:
* { BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
* This line will configure a Brumby board (any number of ports!) at
* io address 360 and shared memory address of c8000. All Brumby boards
* configured into a system must have their own separate io and memory
* addresses. No interrupt is required.
* Another example:
* { BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
* This line will configure an original Stallion board at io address 330
* and shared memory address d0000 (this would only be valid for a "V4.0"
* or Rev.O Stallion board). All Stallion boards configured into the
* system must have their own separate io and memory addresses. No
* interrupt is required.
*/
typedef struct {
int brdtype;
int ioaddr1;
int ioaddr2;
unsigned long memaddr;
int irq;
int irqtype;
} stlconf_t;
static stlconf_t stli_brdconf[] = {
/*{ BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },*/
};
static int stli_nrbrds = sizeof(stli_brdconf) / sizeof(stlconf_t);
/*
* 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
static devfs_handle_t devfs_handle;
/*****************************************************************************/
/*
* 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 STL_DRVTYPSERIAL 1
#define STL_DRVTYPCALLOUT 2
/*****************************************************************************/
/*
* 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 char *stli_calloutname = "cue";
static struct tty_driver stli_serial;
static struct tty_driver stli_callout;
static struct tty_struct *stli_ttys[STL_MAXDEVS];
static struct termios *stli_termios[STL_MAXDEVS];
static struct termios *stli_termioslocked[STL_MAXDEVS];
static int stli_refcount;
/*
* We will need to allocate a temporary write buffer for chars that
* come direct from user space. The problem is that a copy from user
* space might cause a page fault (typically on a system that is
* swapping!). All ports will share one buffer - since if the system
* is already swapping a shared buffer won't make things any worse.
*/
static char *stli_tmpwritebuf;
static DECLARE_MUTEX(stli_tmpwritesem);
#define STLI_TXBUFSIZE 4096
/*
* Use a fast local buffer for cooked characters. Typically a whole
* bunch of cooked characters come in for a port, 1 at a time. So we
* save those up into a local buffer, then write out the whole lot
* with a large memcpy. Just use 1 buffer for all ports, since its
* use it is only need for short periods of time by each port.
*/
static char *stli_txcookbuf;
static int stli_txcooksize;
static int stli_txcookrealsize;
static struct tty_struct *stli_txcooktty;
/*
* Define a local default termios struct. All ports will be created
* with this termios initially. Basically all it defines is a raw port
* at 9600 baud, 8 data bits, no parity, 1 stop bit.
*/
static struct termios stli_deftermios = {
c_cflag: (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
c_cc: INIT_C_CC,
};
/*
* Define global stats structures. Not used often, and can be
* re-used for each stats call.
*/
static comstats_t stli_comstats;
static combrd_t stli_brdstats;
static asystats_t stli_cdkstats;
static stlibrd_t stli_dummybrd;
static stliport_t stli_dummyport;
/*****************************************************************************/
static stlibrd_t *stli_brds[STL_MAXBRDS];
static int stli_shared;
/*
* Per board state flags. Used with the state field of the board struct.
* Not really much here... All we need to do is keep track of whether
* the board has been detected, and whether it is actually running a slave
* or not.
*/
#define BST_FOUND 0x1
#define BST_STARTED 0x2
/*
* Define the set of port state flags. These are marked for internal
* state purposes only, usually to do with the state of communications
* with the slave. Most of them need to be updated atomically, so always
* use the bit setting operations (unless protected by cli/sti).
*/
#define ST_INITIALIZING 1
#define ST_OPENING 2
#define ST_CLOSING 3
#define ST_CMDING 4
#define ST_TXBUSY 5
#define ST_RXING 6
#define ST_DOFLUSHRX 7
#define ST_DOFLUSHTX 8
#define ST_DOSIGS 9
#define ST_RXSTOP 10
#define ST_GETSIGS 11
/*
* Define an array of board names as printable strings. Handy for
* referencing boards when printing trace and stuff.
*/
static char *stli_brdnames[] = {
"Unknown",
"Stallion",
"Brumby",
"ONboard-MC",
"ONboard",
"Brumby",
"Brumby",
"ONboard-EI",
(char *) NULL,
"ONboard",
"ONboard-MC",
"ONboard-MC",
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
(char *) NULL,
"EasyIO",
"EC8/32-AT",
"EC8/32-MC",
"EC8/64-AT",
"EC8/64-EI",
"EC8/64-MC",
"EC8/32-PCI",
"EC8/64-PCI",
"EasyIO-PCI",
"EC/RA-PCI",
};
/*****************************************************************************/
#ifdef MODULE
/*
* Define some string labels for arguments passed from the module
* load line. These allow for easy board definitions, and easy
* modification of the io, memory and irq resoucres.
*/
static char *board0[8];
static char *board1[8];
static char *board2[8];
static char *board3[8];
static char **stli_brdsp[] = {
(char **) &board0,
(char **) &board1,
(char **) &board2,
(char **) &board3
};
/*
* Define a set of common board names, and types. This is used to
* parse any module arguments.
*/
typedef struct stlibrdtype {
char *name;
int type;
} stlibrdtype_t;
static stlibrdtype_t stli_brdstr[] = {
{ "stallion", BRD_STALLION },
{ "1", BRD_STALLION },
{ "brumby", BRD_BRUMBY },
{ "brumby4", BRD_BRUMBY },
{ "brumby/4", BRD_BRUMBY },
{ "brumby-4", BRD_BRUMBY },
{ "brumby8", BRD_BRUMBY },
{ "brumby/8", BRD_BRUMBY },
{ "brumby-8", BRD_BRUMBY },
{ "brumby16", BRD_BRUMBY },
{ "brumby/16", BRD_BRUMBY },
{ "brumby-16", BRD_BRUMBY },
{ "2", BRD_BRUMBY },
{ "onboard2", BRD_ONBOARD2 },
{ "onboard-2", BRD_ONBOARD2 },
{ "onboard/2", BRD_ONBOARD2 },
{ "onboard-mc", BRD_ONBOARD2 },
{ "onboard/mc", BRD_ONBOARD2 },
{ "onboard-mca", BRD_ONBOARD2 },
{ "onboard/mca", BRD_ONBOARD2 },
{ "3", BRD_ONBOARD2 },
{ "onboard", BRD_ONBOARD },
{ "onboardat", BRD_ONBOARD },
{ "4", BRD_ONBOARD },
{ "onboarde", BRD_ONBOARDE },
{ "onboard-e", BRD_ONBOARDE },
{ "onboard/e", BRD_ONBOARDE },
{ "onboard-ei", BRD_ONBOARDE },
{ "onboard/ei", BRD_ONBOARDE },
{ "7", BRD_ONBOARDE },
{ "ecp", BRD_ECP },
{ "ecpat", BRD_ECP },
{ "ec8/64", BRD_ECP },
{ "ec8/64-at", BRD_ECP },
{ "ec8/64-isa", BRD_ECP },
{ "23", BRD_ECP },
{ "ecpe", BRD_ECPE },
{ "ecpei", BRD_ECPE },
{ "ec8/64-e", BRD_ECPE },
{ "ec8/64-ei", BRD_ECPE },
{ "24", BRD_ECPE },
{ "ecpmc", BRD_ECPMC },
{ "ec8/64-mc", BRD_ECPMC },
{ "ec8/64-mca", BRD_ECPMC },
{ "25", BRD_ECPMC },
{ "ecppci", BRD_ECPPCI },
{ "ec/ra", BRD_ECPPCI },
{ "ec/ra-pc", BRD_ECPPCI },
{ "ec/ra-pci", BRD_ECPPCI },
{ "29", BRD_ECPPCI },
};
/*
* Define the module agruments.
*/
MODULE_AUTHOR("Greg Ungerer");
MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver");
MODULE_LICENSE("GPL");
MODULE_PARM(board0, "1-3s");
MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]");
MODULE_PARM(board1, "1-3s");
MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]");
MODULE_PARM(board2, "1-3s");
MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]");
MODULE_PARM(board3, "1-3s");
MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]");
#endif
/*
* 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,
};
static int stli_eisamempsize = sizeof(stli_eisamemprobeaddrs) / sizeof(unsigned long);
int stli_eisaprobe = STLI_EISAPROBE;
/*
* Define the Stallion PCI vendor and device IDs.
*/
#ifdef CONFIG_PCI
#ifndef PCI_VENDOR_ID_STALLION
#define PCI_VENDOR_ID_STALLION 0x124d
#endif
#ifndef PCI_DEVICE_ID_ECRA
#define PCI_DEVICE_ID_ECRA 0x0004
#endif
#endif
static struct pci_device_id istallion_pci_tbl[] = {
{ PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, istallion_pci_tbl);
/*****************************************************************************/
/*
* Hardware configuration info for ECP boards. These defines apply
* to the directly accessible io ports of the ECP. There is a set of
* defines for each ECP board type, ISA, EISA, MCA and PCI.
*/
#define ECP_IOSIZE 4
#define ECP_MEMSIZE (128 * 1024)
#define ECP_PCIMEMSIZE (256 * 1024)
#define ECP_ATPAGESIZE (4 * 1024)
#define ECP_MCPAGESIZE (4 * 1024)
#define ECP_EIPAGESIZE (64 * 1024)
#define ECP_PCIPAGESIZE (64 * 1024)
#define STL_EISAID 0x8c4e
/*
* Important defines for the ISA class of ECP board.
*/
#define ECP_ATIREG 0
#define ECP_ATCONFR 1
#define ECP_ATMEMAR 2
#define ECP_ATMEMPR 3
#define ECP_ATSTOP 0x1
#define ECP_ATINTENAB 0x10
#define ECP_ATENABLE 0x20
#define ECP_ATDISABLE 0x00
#define ECP_ATADDRMASK 0x3f000
#define ECP_ATADDRSHFT 12
/*
* Important defines for the EISA class of ECP board.
*/
#define ECP_EIIREG 0
#define ECP_EIMEMARL 1
#define ECP_EICONFR 2
#define ECP_EIMEMARH 3
#define ECP_EIENABLE 0x1
#define ECP_EIDISABLE 0x0
#define ECP_EISTOP 0x4
#define ECP_EIEDGE 0x00
#define ECP_EILEVEL 0x80
#define ECP_EIADDRMASKL 0x00ff0000
#define ECP_EIADDRSHFTL 16
#define ECP_EIADDRMASKH 0xff000000
#define ECP_EIADDRSHFTH 24
#define ECP_EIBRDENAB 0xc84
#define ECP_EISAID 0x4
/*
* Important defines for the Micro-channel class of ECP board.
* (It has a lot in common with the ISA boards.)
*/
#define ECP_MCIREG 0
#define ECP_MCCONFR 1
#define ECP_MCSTOP 0x20
#define ECP_MCENABLE 0x80
#define ECP_MCDISABLE 0x00
/*
* Important defines for the PCI class of ECP board.
* (It has a lot in common with the other ECP boards.)
*/
#define ECP_PCIIREG 0
#define ECP_PCICONFR 1
#define ECP_PCISTOP 0x01
/*
* Hardware configuration info for ONboard and Brumby boards. These
* defines apply to the directly accessible io ports of these boards.
*/
#define ONB_IOSIZE 16
#define ONB_MEMSIZE (64 * 1024)
#define ONB_ATPAGESIZE (64 * 1024)
#define ONB_MCPAGESIZE (64 * 1024)
#define ONB_EIMEMSIZE (128 * 1024)
#define ONB_EIPAGESIZE (64 * 1024)
/*
* Important defines for the ISA class of ONboard board.
*/
#define ONB_ATIREG 0
#define ONB_ATMEMAR 1
#define ONB_ATCONFR 2
#define ONB_ATSTOP 0x4
#define ONB_ATENABLE 0x01
#define ONB_ATDISABLE 0x00
#define ONB_ATADDRMASK 0xff0000
#define ONB_ATADDRSHFT 16
#define ONB_MEMENABLO 0
#define ONB_MEMENABHI 0x02
/*
* Important defines for the EISA class of ONboard board.
*/
#define ONB_EIIREG 0
#define ONB_EIMEMARL 1
#define ONB_EICONFR 2
#define ONB_EIMEMARH 3
#define ONB_EIENABLE 0x1
#define ONB_EIDISABLE 0x0
#define ONB_EISTOP 0x4
#define ONB_EIEDGE 0x00
#define ONB_EILEVEL 0x80
#define ONB_EIADDRMASKL 0x00ff0000
#define ONB_EIADDRSHFTL 16
#define ONB_EIADDRMASKH 0xff000000
#define ONB_EIADDRSHFTH 24
#define ONB_EIBRDENAB 0xc84
#define ONB_EISAID 0x1
/*
* Important defines for the Brumby boards. They are pretty simple,
* there is not much that is programmably configurable.
*/
#define BBY_IOSIZE 16
#define BBY_MEMSIZE (64 * 1024)
#define BBY_PAGESIZE (16 * 1024)
#define BBY_ATIREG 0
#define BBY_ATCONFR 1
#define BBY_ATSTOP 0x4
/*
* Important defines for the Stallion boards. They are pretty simple,
* there is not much that is programmably configurable.
*/
#define STAL_IOSIZE 16
#define STAL_MEMSIZE (64 * 1024)
#define STAL_PAGESIZE (64 * 1024)
/*
* Define the set of status register values for EasyConnection panels.
* The signature will return with the status value for each panel. From
* this we can determine what is attached to the board - before we have
* actually down loaded any code to it.
*/
#define ECH_PNLSTATUS 2
#define ECH_PNL16PORT 0x20
#define ECH_PNLIDMASK 0x07
#define ECH_PNLXPID 0x40
#define ECH_PNLINTRPEND 0x80
/*
* Define some macros to do things to the board. Even those these boards
* are somewhat related there is often significantly different ways of
* doing some operation on it (like enable, paging, reset, etc). So each
* board class has a set of functions which do the commonly required
* operations. The macros below basically just call these functions,
* generally checking for a NULL function - which means that the board
* needs nothing done to it to achieve this operation!
*/
#define EBRDINIT(brdp)
if (brdp->init != NULL)
(* brdp->init)(brdp)
#define EBRDENABLE(brdp)
if (brdp->enable != NULL)
(* brdp->enable)(brdp);
#define EBRDDISABLE(brdp)
if (brdp->disable != NULL)
(* brdp->disable)(brdp);
#define EBRDINTR(brdp)
if (brdp->intr != NULL)
(* brdp->intr)(brdp);
#define EBRDRESET(brdp)
if (brdp->reset != NULL)
(* brdp->reset)(brdp);
#define EBRDGETMEMPTR(brdp,offset)
(* brdp->getmemptr)(brdp, offset, __LINE__)
/*
* Define the maximal baud rate, and the default baud base for ports.
*/
#define STL_MAXBAUD 460800
#define STL_BAUDBASE 115200
#define STL_CLOSEDELAY (5 * HZ / 10)
/*****************************************************************************/
/*
* Define macros to extract a brd or port number from a minor number.
*/
#define MINOR2BRD(min) (((min) & 0xc0) >> 6)
#define MINOR2PORT(min) ((min) & 0x3f)
/*
* Define a baud rate table that converts termios baud rate selector
* into the actual baud rate value. All baud rate calculations are based
* on the actual baud rate required.
*/
static unsigned int stli_baudrates[] = {
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
};
/*****************************************************************************/
/*
* Define some handy local macros...
*/
#undef MIN
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
#undef TOLOWER
#define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
/*****************************************************************************/
/*
* Prototype all functions in this driver!
*/
#ifdef MODULE
int init_module(void);
void cleanup_module(void);
static void stli_argbrds(void);
static int stli_parsebrd(stlconf_t *confp, char **argp);
static unsigned long stli_atol(char *str);
#endif
int stli_init(void);
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, int from_user, const unsigned char *buf, int count);
static void stli_putchar(struct tty_struct *tty, unsigned char ch);
static void stli_flushchars(struct tty_struct *tty);
static int stli_writeroom(struct tty_struct *tty);
static int stli_charsinbuffer(struct tty_struct *tty);
static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
static void stli_settermios(struct tty_struct *tty, struct termios *old);
static void stli_throttle(struct tty_struct *tty);
static void stli_unthrottle(struct tty_struct *tty);
static void stli_stop(struct tty_struct *tty);
static void stli_start(struct tty_struct *tty);
static void stli_flushbuffer(struct tty_struct *tty);
static void stli_breakctl(struct tty_struct *tty, int state);
static void stli_waituntilsent(struct tty_struct *tty, int timeout);
static void stli_sendxchar(struct tty_struct *tty, char ch);
static void stli_hangup(struct tty_struct *tty);
static int stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos);
static int stli_brdinit(stlibrd_t *brdp);
static int stli_startbrd(stlibrd_t *brdp);
static ssize_t stli_memread(struct file *fp, char *buf, size_t count, loff_t *offp);
static ssize_t stli_memwrite(struct file *fp, const char *buf, size_t count, loff_t *offp);
static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
static void stli_brdpoll(stlibrd_t *brdp, volatile cdkhdr_t *hdrp);
static void stli_poll(unsigned long arg);
static int stli_hostcmd(stlibrd_t *brdp, stliport_t *portp);
static int stli_initopen(stlibrd_t *brdp, stliport_t *portp);
static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
static void stli_dohangup(void *arg);
static void stli_delay(int len);
static int stli_setport(stliport_t *portp);
static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
static void stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp);
static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
static long stli_mktiocm(unsigned long sigvalue);
static void stli_read(stlibrd_t *brdp, stliport_t *portp);
static void stli_getserial(stliport_t *portp, struct serial_struct *sp);
static int stli_setserial(stliport_t *portp, struct serial_struct *sp);
static int stli_getbrdstats(combrd_t *bp);
static int stli_getportstats(stliport_t *portp, comstats_t *cp);
static int stli_portcmdstats(stliport_t *portp);
static int stli_clrportstats(stliport_t *portp, comstats_t *cp);
static int stli_getportstruct(unsigned long arg);
static int stli_getbrdstruct(unsigned long arg);
static void *stli_memalloc(int len);
static stlibrd_t *stli_allocbrd(void);
static void stli_ecpinit(stlibrd_t *brdp);
static void stli_ecpenable(stlibrd_t *brdp);
static void stli_ecpdisable(stlibrd_t *brdp);
static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_ecpreset(stlibrd_t *brdp);
static void stli_ecpintr(stlibrd_t *brdp);
static void stli_ecpeiinit(stlibrd_t *brdp);
static void stli_ecpeienable(stlibrd_t *brdp);
static void stli_ecpeidisable(stlibrd_t *brdp);
static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_ecpeireset(stlibrd_t *brdp);
static void stli_ecpmcenable(stlibrd_t *brdp);
static void stli_ecpmcdisable(stlibrd_t *brdp);
static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_ecpmcreset(stlibrd_t *brdp);
static void stli_ecppciinit(stlibrd_t *brdp);
static char *stli_ecppcigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_ecppcireset(stlibrd_t *brdp);
static void stli_onbinit(stlibrd_t *brdp);
static void stli_onbenable(stlibrd_t *brdp);
static void stli_onbdisable(stlibrd_t *brdp);
static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_onbreset(stlibrd_t *brdp);
static void stli_onbeinit(stlibrd_t *brdp);
static void stli_onbeenable(stlibrd_t *brdp);
static void stli_onbedisable(stlibrd_t *brdp);
static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_onbereset(stlibrd_t *brdp);
static void stli_bbyinit(stlibrd_t *brdp);
static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_bbyreset(stlibrd_t *brdp);
static void stli_stalinit(stlibrd_t *brdp);
static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
static void stli_stalreset(stlibrd_t *brdp);
static stliport_t *stli_getport(int brdnr, int panelnr, int portnr);
static inline int stli_initbrds(void);
static inline int stli_initecp(stlibrd_t *brdp);
static inline int stli_initonb(stlibrd_t *brdp);
static inline int stli_findeisabrds(void);
static inline int stli_eisamemprobe(stlibrd_t *brdp);
static inline int stli_initports(stlibrd_t *brdp);
static inline int stli_getbrdnr(void);
#ifdef CONFIG_PCI
static inline int stli_findpcibrds(void);
static inline int stli_initpcibrd(int brdtype, struct pci_dev *devp);
#endif
/*****************************************************************************/
/*
* Define the driver info for a user level shared memory device. This
* device will work sort of like the /dev/kmem device - except that it
* will give access to the shared memory on the Stallion intelligent
* board. This is also a very useful debugging tool.
*/
static struct file_operations stli_fsiomem = {
owner: THIS_MODULE,
read: stli_memread,
write: stli_memwrite,
ioctl: stli_memioctl,
};
/*****************************************************************************/
/*
* Define a timer_list entry for our poll routine. The slave board
* is polled every so often to see if anything needs doing. This is
* much cheaper on host cpu than using interrupts. It turns out to
* not increase character latency by much either...
*/
static struct timer_list stli_timerlist = {
function: stli_poll
};
static int stli_timeron;
/*
* Define the calculation for the timeout routine.
*/
#define STLI_TIMEOUT (jiffies + 1)
/*****************************************************************************/
#ifdef MODULE
/*
* Loadable module initialization stuff.
*/
int init_module()
{
unsigned long flags;
#if DEBUG
printk("init_module()n");
#endif
save_flags(flags);
cli();
stli_init();
restore_flags(flags);
return(0);
}
/*****************************************************************************/
void cleanup_module()
{
stlibrd_t *brdp;
stliport_t *portp;
unsigned long flags;
int i, j;
#if DEBUG
printk("cleanup_module()n");
#endif
printk(KERN_INFO "Unloading %s: version %sn", stli_drvtitle,
stli_drvversion);
save_flags(flags);
cli();
/*
* Free up all allocated resources used by the ports. This includes
* memory and interrupts.
*/
if (stli_timeron) {
stli_timeron = 0;
del_timer(&stli_timerlist);
}
i = tty_unregister_driver(&stli_serial);
j = tty_unregister_driver(&stli_callout);
if (i || j) {
printk("STALLION: failed to un-register tty driver, "
"errno=%d,%dn", -i, -j);
restore_flags(flags);
return;
}
devfs_unregister (devfs_handle);
if ((i = devfs_unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
printk("STALLION: failed to un-register serial memory device, "
"errno=%dn", -i);
if (stli_tmpwritebuf != (char *) NULL)
kfree(stli_tmpwritebuf);
if (stli_txcookbuf != (char *) NULL)
kfree(stli_txcookbuf);
for (i = 0; (i < stli_nrbrds); i++) {
if ((brdp = stli_brds[i]) == (stlibrd_t *) NULL)
continue;
for (j = 0; (j < STL_MAXPORTS); j++) {
portp = brdp->ports[j];
if (portp != (stliport_t *) NULL) {
if (portp->tty != (struct tty_struct *) NULL)
tty_hangup(portp->tty);
kfree(portp);
}
}
iounmap(brdp->membase);
if (brdp->iosize > 0)
release_region(brdp->iobase, brdp->iosize);
kfree(brdp);
stli_brds[i] = (stlibrd_t *) NULL;
}
restore_flags(flags);
}
/*****************************************************************************/
/*
* Check for any arguments passed in on the module load command line.
*/
static void stli_argbrds()
{
stlconf_t conf;
stlibrd_t *brdp;
int nrargs, i;
#if DEBUG
printk("stli_argbrds()n");
#endif
nrargs = sizeof(stli_brdsp) / sizeof(char **);
for (i = stli_nrbrds; (i < nrargs); i++) {
memset(&conf, 0, sizeof(conf));
if (stli_parsebrd(&conf, stli_brdsp[i]) == 0)
continue;
if ((brdp = stli_allocbrd()) == (stlibrd_t *) NULL)
continue;
stli_nrbrds = i + 1;
brdp->brdnr = i;
brdp->brdtype = conf.brdtype;
brdp->iobase = conf.ioaddr1;
brdp->memaddr = conf.memaddr;
stli_brdinit(brdp);
}
}
/*****************************************************************************/
/*
* Convert an ascii string number into an unsigned long.
*/
static unsigned long stli_atol(char *str)
{
unsigned long val;
int base, c;
char *sp;
val = 0;
sp = str;
if ((*sp == '0') && (*(sp+1) == 'x')) {
base = 16;
sp += 2;
} else if (*sp == '0') {
base = 8;
sp++;
} else {
base = 10;
}
for (; (*sp != 0); sp++) {
c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
if ((c < 0) || (c >= base)) {
printk("STALLION: invalid argument %sn", str);
val = 0;
break;
}
val = (val * base) + c;
}
return(val);
}
/*****************************************************************************/
/*
* Parse the supplied argument string, into the board conf struct.
*/
static int stli_parsebrd(stlconf_t *confp, char **argp)
{
char *sp;
int nrbrdnames, i;
#if DEBUG
printk("stli_parsebrd(confp=%x,argp=%x)n", (int) confp, (int) argp);
#endif
if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
return(0);
for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
*sp = TOLOWER(*sp);
nrbrdnames = sizeof(stli_brdstr) / sizeof(stlibrdtype_t);
for (i = 0; (i < nrbrdnames); i++) {
if (strcmp(stli_brdstr[i].name, argp[0]) == 0)
break;
}
if (i >= nrbrdnames) {
printk("STALLION: unknown board name, %s?n", argp[0]);
return(0);
}
confp->brdtype = stli_brdstr[i].type;
if ((argp[1] != (char *) NULL) && (*argp[1] != 0))
confp->ioaddr1 = stli_atol(argp[1]);
if ((argp[2] != (char *) NULL) && (*argp[2] != 0))
confp->memaddr = stli_atol(argp[2]);
return(1);
}
#endif
/*****************************************************************************/
/*
* Local driver kernel malloc routine.
*/
static void *stli_memalloc(int len)
{
return((void *) kmalloc(len, GFP_KERNEL));
}
/*****************************************************************************/
static int stli_open(struct tty_struct *tty, struct file *filp)
{
stlibrd_t *brdp;
stliport_t *portp;
unsigned int minordev;
int brdnr, portnr, rc;
#if DEBUG
printk("stli_open(tty=%x,filp=%x): device=%xn", (int) tty,
(int) filp, tty->device);
#endif
minordev = MINOR(tty->device);
brdnr = MINOR2BRD(minordev);
if (brdnr >= stli_nrbrds)
return(-ENODEV);
brdp = stli_brds[brdnr];
if (brdp == (stlibrd_t *) NULL)
return(-ENODEV);
if ((brdp->state & BST_STARTED) == 0)
return(-ENODEV);
portnr = MINOR2PORT(minordev);
if ((portnr < 0) || (portnr > brdp->nrports))
return(-ENODEV);
portp = brdp->ports[portnr];
if (portp == (stliport_t *) NULL)
return(-ENODEV);
if (portp->devnr < 1)
return(-ENODEV);
MOD_INC_USE_COUNT;
/*
* 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)
return(-EAGAIN);
return(-ERESTARTSYS);
}
/*
* 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++;
while (test_bit(ST_INITIALIZING, &portp->state)) {
if (signal_pending(current))
return(-ERESTARTSYS);
interruptible_sleep_on(&portp->raw_wait);
}
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)
return(rc);
}
/*
* 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)
return(-EAGAIN);
return(-ERESTARTSYS);
}
/*
* 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 (tty->driver.subtype == STL_DRVTYPCALLOUT) {
if (portp->flags & ASYNC_NORMAL_ACTIVE)
return(-EBUSY);
if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
if ((portp->flags & ASYNC_SESSION_LOCKOUT) &&
(portp->session != current->session))
return(-EBUSY);
if ((portp->flags & ASYNC_PGRP_LOCKOUT) &&
(portp->pgrp != current->pgrp))
return(-EBUSY);
}
portp->flags |= ASYNC_CALLOUT_ACTIVE;
} else {
if (filp->f_flags & O_NONBLOCK) {
if (portp->flags & ASYNC_CALLOUT_ACTIVE)
return(-EBUSY);
} else {
if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
return(rc);
}
portp->flags |= ASYNC_NORMAL_ACTIVE;
}
if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) {
if (tty->driver.subtype == STL_DRVTYPSERIAL)
*tty->termios = portp->normaltermios;
else
*tty->termios = portp->callouttermios;
stli_setport(portp);
}
portp->session = current->session;
portp->pgrp = current->pgrp;
return(0);
}
/*****************************************************************************/
static void stli_close(struct tty_struct *tty, struct file *filp)
{
stlibrd_t *brdp;
stliport_t *portp;
unsigned long flags;
#if DEBUG
printk("stli_close(tty=%x,filp=%x)n", (int) tty, (int) filp);
#endif
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
save_flags(flags);
cli();
if (tty_hung_up_p(filp)) {
MOD_DEC_USE_COUNT;
restore_flags(flags);
return;
}
if ((tty->count == 1) && (portp->refcount != 1))
portp->refcount = 1;
if (portp->refcount-- > 1) {
MOD_DEC_USE_COUNT;
restore_flags(flags);
return;
}
portp->flags |= ASYNC_CLOSING;
if (portp->flags & ASYNC_NORMAL_ACTIVE)
portp->normaltermios = *tty->termios;
if (portp->flags & ASYNC_CALLOUT_ACTIVE)
portp->callouttermios = *tty->termios;
/*
* 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;
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;
portp->tty = (struct tty_struct *) NULL;
if (portp->openwaitcnt) {
if (portp->close_delay)
stli_delay(portp->close_delay);
wake_up_interruptible(&portp->open_wait);
}
portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE |
ASYNC_CLOSING);
wake_up_interruptible(&portp->close_wait);
MOD_DEC_USE_COUNT;
restore_flags(flags);
}
/*****************************************************************************/
/*
* Carry out first open operations on a port. This involves a number of
* commands to be sent to the slave. We need to open the port, set the
* notification events, set the initial port settings, get and set the
* initial signal values. We sleep and wait in between each one. But
* this still all happens pretty quickly.
*/
static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
{
struct tty_struct *tty;
asynotify_t nt;
asyport_t aport;
int rc;
#if DEBUG
printk("stli_initopen(brdp=%x,portp=%x)n", (int) brdp, (int) portp);
#endif
if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
return(rc);
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)
return(rc);
tty = portp->tty;
if (tty == (struct tty_struct *) NULL)
return(-ENODEV);
stli_mkasyport(portp, &aport, tty->termios);
if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
sizeof(asyport_t), 0)) < 0)
return(rc);
set_bit(ST_GETSIGS, &portp->state);
if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig,
sizeof(asysigs_t), 1)) < 0)
return(rc);
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)
return(rc);
return(0);
}
/*****************************************************************************/
/*
* Send an open message to the slave. This will sleep waiting for the
* acknowledgement, so must have user context. We need to co-ordinate
* with close events here, since we don't want open and close events
* to overlap.
*/
static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
volatile cdkhdr_t *hdrp;
volatile cdkctrl_t *cp;
volatile unsigned char *bits;
unsigned long flags;
int rc;
#if DEBUG
printk("stli_rawopen(brdp=%x,portp=%x,arg=%x,wait=%d)n",
(int) brdp, (int) portp, (int) arg, wait);
#endif
/*
* Send a message to the slave to open this port.
*/
save_flags(flags);
cli();
/*
* 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.
*/
while (test_bit(ST_CLOSING, &portp->state)) {
if (signal_pending(current)) {
restore_flags(flags);
return(-ERESTARTSYS);
}
interruptible_sleep_on(&portp->raw_wait);
}
/*
* 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.
*/
EBRDENABLE(brdp);
cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
cp->openarg = arg;
cp->open = 1;
hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
portp->portidx;
*bits |= portp->portbit;
EBRDDISABLE(brdp);
if (wait == 0) {
restore_flags(flags);
return(0);
}
/*
* Slave is in action, so now we must wait for the open acknowledgment
* to come back.
*/
rc = 0;
set_bit(ST_OPENING, &portp->state);
while (test_bit(ST_OPENING, &portp->state)) {
if (signal_pending(current)) {
rc = -ERESTARTSYS;
break;
}
interruptible_sleep_on(&portp->raw_wait);
}
restore_flags(flags);
if ((rc == 0) && (portp->rc != 0))
rc = -EIO;
return(rc);
}
/*****************************************************************************/
/*
* Send a close message to the slave. Normally this will sleep waiting
* for the acknowledgement, but if wait parameter is 0 it will not. If
* wait is true then must have user context (to sleep).
*/
static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
{
volatile cdkhdr_t *hdrp;
volatile cdkctrl_t *cp;
volatile unsigned char *bits;
unsigned long flags;
int rc;
#if DEBUG
printk("stli_rawclose(brdp=%x,portp=%x,arg=%x,wait=%d)n",
(int) brdp, (int) portp, (int) arg, wait);
#endif
save_flags(flags);
cli();
/*
* Slave is already closing this port. This can happen if a hangup
* occurs on this port.
*/
if (wait) {
while (test_bit(ST_CLOSING, &portp->state)) {
if (signal_pending(current)) {
restore_flags(flags);
return(-ERESTARTSYS);
}
interruptible_sleep_on(&portp->raw_wait);
}
}
/*
* Write the close command into shared memory.
*/
EBRDENABLE(brdp);
cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
cp->closearg = arg;
cp->close = 1;
hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
portp->portidx;
*bits |= portp->portbit;
EBRDDISABLE(brdp);
set_bit(ST_CLOSING, &portp->state);
if (wait == 0) {
restore_flags(flags);
return(0);
}
/*
* Slave is in action, so now we must wait for the open acknowledgment
* to come back.
*/
rc = 0;
while (test_bit(ST_CLOSING, &portp->state)) {
if (signal_pending(current)) {
rc = -ERESTARTSYS;
break;
}
interruptible_sleep_on(&portp->raw_wait);
}
restore_flags(flags);
if ((rc == 0) && (portp->rc != 0))
rc = -EIO;
return(rc);
}
/*****************************************************************************/
/*
* Send a command to the slave and wait for the response. This must
* have user context (it sleeps). This routine is generic in that it
* can send any type of command. Its purpose is to wait for that command
* to complete (as opposed to initiating the command then returning).
*/
static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
{
unsigned long flags;
#if DEBUG
printk("stli_cmdwait(brdp=%x,portp=%x,cmd=%x,arg=%x,size=%d,"
"copyback=%d)n", (int) brdp, (int) portp, (int) cmd,
(int) arg, size, copyback);
#endif
save_flags(flags);
cli();
while (test_bit(ST_CMDING, &portp->state)) {
if (signal_pending(current)) {
restore_flags(flags);
return(-ERESTARTSYS);
}
interruptible_sleep_on(&portp->raw_wait);
}
stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
while (test_bit(ST_CMDING, &portp->state)) {
if (signal_pending(current)) {
restore_flags(flags);
return(-ERESTARTSYS);
}
interruptible_sleep_on(&portp->raw_wait);
}
restore_flags(flags);
if (portp->rc != 0)
return(-EIO);
return(0);
}
/*****************************************************************************/
/*
* Send the termios settings for this port to the slave. This sleeps
* waiting for the command to complete - so must have user context.
*/
static int stli_setport(stliport_t *portp)
{
stlibrd_t *brdp;
asyport_t aport;
#if DEBUG
printk("stli_setport(portp=%x)n", (int) portp);
#endif
if (portp == (stliport_t *) NULL)
return(-ENODEV);
if (portp->tty == (struct tty_struct *) NULL)
return(-ENODEV);
if ((portp->brdnr < 0) && (portp->brdnr >= stli_nrbrds))
return(-ENODEV);
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return(-ENODEV);
stli_mkasyport(portp, &aport, portp->tty->termios);
return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
}
/*****************************************************************************/
/*
* Wait for a specified delay period, this is not a busy-loop. It will
* give up the processor while waiting. Unfortunately this has some
* rather intimate knowledge of the process management stuff.
*/
static void stli_delay(int len)
{
#if DEBUG
printk("stli_delay(len=%d)n", len);
#endif
if (len > 0) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(len);
set_current_state(TASK_RUNNING);
}
}
/*****************************************************************************/
/*
* Possibly need to wait for carrier (DCD signal) to come high. Say
* maybe because if we are clocal then we don't need to wait...
*/
static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
{
unsigned long flags;
int rc, doclocal;
#if DEBUG
printk("stli_waitcarrier(brdp=%x,portp=%x,filp=%x)n",
(int) brdp, (int) portp, (int) filp);
#endif
rc = 0;
doclocal = 0;
if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
if (portp->normaltermios.c_cflag & CLOCAL)
doclocal++;
} else {
if (portp->tty->termios->c_cflag & CLOCAL)
doclocal++;
}
save_flags(flags);
cli();
portp->openwaitcnt++;
if (! tty_hung_up_p(filp))
portp->refcount--;
for (;;) {
if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) {
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_CALLOUT_ACTIVE) == 0) &&
((portp->flags & ASYNC_CLOSING) == 0) &&
(doclocal || (portp->sigs & TIOCM_CD))) {
break;
}
if (signal_pending(current)) {
rc = -ERESTARTSYS;
break;
}
interruptible_sleep_on(&portp->open_wait);
}
if (! tty_hung_up_p(filp))
portp->refcount++;
portp->openwaitcnt--;
restore_flags(flags);
return(rc);
}
/*****************************************************************************/
/*
* 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, int from_user, const unsigned char *buf, int count)
{
volatile cdkasy_t *ap;
volatile cdkhdr_t *hdrp;
volatile unsigned char *bits;
unsigned char *shbuf, *chbuf;
stliport_t *portp;
stlibrd_t *brdp;
unsigned int len, stlen, head, tail, size;
unsigned long flags;
#if DEBUG
printk("stli_write(tty=%x,from_user=%d,buf=%x,count=%d)n",
(int) tty, from_user, (int) buf, count);
#endif
if ((tty == (struct tty_struct *) NULL) ||
(stli_tmpwritebuf == (char *) NULL))
return(0);
if (tty == stli_txcooktty)
stli_flushchars(tty);
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return(0);
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return(0);
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return(0);
chbuf = (unsigned char *) buf;
/*
* If copying direct from user space we need to be able to handle page
* faults while we are copying. To do this copy as much as we can now
* into a kernel buffer. From there we copy it into shared memory. The
* big problem is that we do not want shared memory enabled when we are
* sleeping (other boards may be serviced while asleep). Something else
* to note here is the reading of the tail twice. Since the boards
* shared memory can be on an 8-bit bus then we need to be very careful
* reading 16 bit quantities - since both the board (slave) and host
* could be writing and reading at the same time.
*/
if (from_user) {
save_flags(flags);
cli();
EBRDENABLE(brdp);
ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
head = (unsigned int) ap->txq.head;
tail = (unsigned int) ap->txq.tail;
if (tail != ((unsigned int) ap->txq.tail))
tail = (unsigned int) ap->txq.tail;
len = (head >= tail) ? (portp->txsize - (head - tail) - 1) :
(tail - head - 1);
count = MIN(len, count);
EBRDDISABLE(brdp);
restore_flags(flags);
down(&stli_tmpwritesem);
copy_from_user(stli_tmpwritebuf, chbuf, count);
chbuf = &stli_tmpwritebuf[0];
}
/*
* All data is now local, shove as much as possible into shared memory.
*/
save_flags(flags);
cli();
EBRDENABLE(brdp);
ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
head = (unsigned int) ap->txq.head;
tail = (unsigned int) ap->txq.tail;
if (tail != ((unsigned int) ap->txq.tail))
tail = (unsigned int) ap->txq.tail;
size = portp->txsize;
if (head >= tail) {
len = size - (head - tail) - 1;
stlen = size - head;
} else {
len = tail - head - 1;
stlen = len;
}
len = MIN(len, count);
count = 0;
shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
while (len > 0) {
stlen = MIN(len, stlen);
memcpy((shbuf + head), chbuf, stlen);
chbuf += stlen;
len -= stlen;
count += stlen;
head += stlen;
if (head >= size) {
head = 0;
stlen = tail;
}
}
ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
ap->txq.head = head;
if (test_bit(ST_TXBUSY, &portp->state)) {
if (ap->changed.data & DT_TXEMPTY)
ap->changed.data &= ~DT_TXEMPTY;
}
hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
portp->portidx;
*bits |= portp->portbit;
set_bit(ST_TXBUSY, &portp->state);
EBRDDISABLE(brdp);
if (from_user)
up(&stli_tmpwritesem);
restore_flags(flags);
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 DEBUG
printk("stli_putchar(tty=%x,ch=%x)n", (int) tty, (int) ch);
#endif
if (tty == (struct tty_struct *) NULL)
return;
if (tty != stli_txcooktty) {
if (stli_txcooktty != (struct tty_struct *) NULL)
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)
{
volatile cdkhdr_t *hdrp;
volatile unsigned char *bits;
volatile cdkasy_t *ap;
struct tty_struct *cooktty;
stliport_t *portp;
stlibrd_t *brdp;
unsigned int len, stlen, head, tail, size, count, cooksize;
unsigned char *buf, *shbuf;
unsigned long flags;
#if DEBUG
printk("stli_flushchars(tty=%x)n", (int) tty);
#endif
cooksize = stli_txcooksize;
cooktty = stli_txcooktty;
stli_txcooksize = 0;
stli_txcookrealsize = 0;
stli_txcooktty = (struct tty_struct *) NULL;
if (tty == (struct tty_struct *) NULL)
return;
if (cooktty == (struct tty_struct *) NULL)
return;
if (tty != cooktty)
tty = cooktty;
if (cooksize == 0)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
save_flags(flags);
cli();
EBRDENABLE(brdp);
ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
head = (unsigned int) ap->txq.head;
tail = (unsigned int) ap->txq.tail;
if (tail != ((unsigned int) ap->txq.tail))
tail = (unsigned int) ap->txq.tail;
size = portp->txsize;
if (head >= tail) {
len = size - (head - tail) - 1;
stlen = size - head;
} else {
len = tail - head - 1;
stlen = len;
}
len = MIN(len, cooksize);
count = 0;
shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
buf = stli_txcookbuf;
while (len > 0) {
stlen = MIN(len, stlen);
memcpy((shbuf + head), buf, stlen);
buf += stlen;
len -= stlen;
count += stlen;
head += stlen;
if (head >= size) {
head = 0;
stlen = tail;
}
}
ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
ap->txq.head = head;
if (test_bit(ST_TXBUSY, &portp->state)) {
if (ap->changed.data & DT_TXEMPTY)
ap->changed.data &= ~DT_TXEMPTY;
}
hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset +
portp->portidx;
*bits |= portp->portbit;
set_bit(ST_TXBUSY, &portp->state);
EBRDDISABLE(brdp);
restore_flags(flags);
}
/*****************************************************************************/
static int stli_writeroom(struct tty_struct *tty)
{
volatile cdkasyrq_t *rp;
stliport_t *portp;
stlibrd_t *brdp;
unsigned int head, tail, len;
unsigned long flags;
#if DEBUG
printk("stli_writeroom(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return(0);
if (tty == stli_txcooktty) {
if (stli_txcookrealsize != 0) {
len = stli_txcookrealsize - stli_txcooksize;
return(len);
}
}
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return(0);
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return(0);
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return(0);
save_flags(flags);
cli();
EBRDENABLE(brdp);
rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
head = (unsigned int) rp->head;
tail = (unsigned int) rp->tail;
if (tail != ((unsigned int) rp->tail))
tail = (unsigned int) rp->tail;
len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
len--;
EBRDDISABLE(brdp);
restore_flags(flags);
if (tty == stli_txcooktty) {
stli_txcookrealsize = len;
len -= stli_txcooksize;
}
return(len);
}
/*****************************************************************************/
/*
* 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)
{
volatile cdkasyrq_t *rp;
stliport_t *portp;
stlibrd_t *brdp;
unsigned int head, tail, len;
unsigned long flags;
#if DEBUG
printk("stli_charsinbuffer(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return(0);
if (tty == stli_txcooktty)
stli_flushchars(tty);
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return(0);
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return(0);
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return(0);
save_flags(flags);
cli();
EBRDENABLE(brdp);
rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
head = (unsigned int) rp->head;
tail = (unsigned int) rp->tail;
if (tail != ((unsigned int) rp->tail))
tail = (unsigned int) rp->tail;
len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
len = 1;
EBRDDISABLE(brdp);
restore_flags(flags);
return(len);
}
/*****************************************************************************/
/*
* Generate the serial struct info.
*/
static void stli_getserial(stliport_t *portp, struct serial_struct *sp)
{
struct serial_struct sio;
stlibrd_t *brdp;
#if DEBUG
printk("stli_getserial(portp=%x,sp=%x)n", (int) portp, (int) sp);
#endif
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];
if (brdp != (stlibrd_t *) NULL)
sio.port = brdp->iobase;
copy_to_user(sp, &sio, sizeof(struct serial_struct));
}
/*****************************************************************************/
/*
* Set port according to the serial struct info.
* At this point we do not do any auto-configure stuff, so we will
* just quietly ignore any requests to change irq, etc.
*/
static int stli_setserial(stliport_t *portp, struct serial_struct *sp)
{
struct serial_struct sio;
int rc;
#if DEBUG
printk("stli_setserial(portp=%x,sp=%x)n", (int) portp, (int) sp);
#endif
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)))
return(-EPERM);
}
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)
return(rc);
return(0);
}
/*****************************************************************************/
static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
{
stliport_t *portp;
stlibrd_t *brdp;
unsigned long lval;
unsigned int ival;
int rc;
#if DEBUG
printk("stli_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)n",
(int) tty, (int) file, cmd, (int) arg);
#endif
if (tty == (struct tty_struct *) NULL)
return(-ENODEV);
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return(-ENODEV);
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return(0);
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return(0);
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return(-EIO);
}
rc = 0;
switch (cmd) {
case TIOCGSOFTCAR:
rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
(unsigned int *) arg);
break;
case TIOCSSOFTCAR:
if ((rc = get_user(ival, (unsigned int *) arg)) == 0)
tty->termios->c_cflag =
(tty->termios->c_cflag & ~CLOCAL) |
(ival ? CLOCAL : 0);
break;
case TIOCMGET:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(unsigned int))) == 0) {
if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS,
&portp->asig, sizeof(asysigs_t), 1)) < 0)
return(rc);
lval = stli_mktiocm(portp->asig.sigvalue);
put_user(lval, (unsigned int *) arg);
}
break;
case TIOCMBIS:
if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
stli_mkasysigs(&portp->asig,
((ival & TIOCM_DTR) ? 1 : -1),
((ival & TIOCM_RTS) ? 1 : -1));
rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
&portp->asig, sizeof(asysigs_t), 0);
}
break;
case TIOCMBIC:
if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
stli_mkasysigs(&portp->asig,
((ival & TIOCM_DTR) ? 0 : -1),
((ival & TIOCM_RTS) ? 0 : -1));
rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
&portp->asig, sizeof(asysigs_t), 0);
}
break;
case TIOCMSET:
if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
stli_mkasysigs(&portp->asig,
((ival & TIOCM_DTR) ? 1 : 0),
((ival & TIOCM_RTS) ? 1 : 0));
rc = stli_cmdwait(brdp, portp, A_SETSIGNALS,
&portp->asig, sizeof(asysigs_t), 0);
}
break;
case TIOCGSERIAL:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct serial_struct))) == 0)
stli_getserial(portp, (struct serial_struct *) arg);
break;
case TIOCSSERIAL:
if ((rc = verify_area(VERIFY_READ, (void *) arg,
sizeof(struct serial_struct))) == 0)
rc = stli_setserial(portp, (struct serial_struct *)arg);
break;
case STL_GETPFLAG:
rc = put_user(portp->pflag, (unsigned int *) arg);
break;
case STL_SETPFLAG:
if ((rc = get_user(portp->pflag, (unsigned int *) arg)) == 0)
stli_setport(portp);
break;
case COM_GETPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(comstats_t))) == 0)
rc = stli_getportstats(portp, (comstats_t *) arg);
break;
case COM_CLRPORTSTATS:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(comstats_t))) == 0)
rc = stli_clrportstats(portp, (comstats_t *) arg);
break;
case TIOCSERCONFIG:
case TIOCSERGWILD:
case TIOCSERSWILD:
case TIOCSERGETLSR:
case TIOCSERGSTRUCT:
case TIOCSERGETMULTI:
case TIOCSERSETMULTI:
default:
rc = -ENOIOCTLCMD;
break;
}
return(rc);
}
/*****************************************************************************/
/*
* This routine assumes that we have user context and can sleep.
* Looks like it is true for the current ttys implementation..!!
*/
static void stli_settermios(struct tty_struct *tty, struct termios *old)
{
stliport_t *portp;
stlibrd_t *brdp;
struct termios *tiosp;
asyport_t aport;
#if DEBUG
printk("stli_settermios(tty=%x,old=%x)n", (int) tty, (int) old);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
tiosp = tty->termios;
if ((tiosp->c_cflag == old->c_cflag) &&
(tiosp->c_iflag == old->c_iflag))
return;
stli_mkasyport(portp, &aport, tiosp);
stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
sizeof(asysigs_t), 0);
if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
tty->hw_stopped = 0;
if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
wake_up_interruptible(&portp->open_wait);
}
/*****************************************************************************/
/*
* Attempt to flow control who ever is sending us data. We won't really
* do any flow control action here. We can't directly, and even if we
* wanted to we would have to send a command to the slave. The slave
* knows how to flow control, and will do so when its buffers reach its
* internal high water marks. So what we will do is set a local state
* bit that will stop us sending any RX data up from the poll routine
* (which is the place where RX data from the slave is handled).
*/
static void stli_throttle(struct tty_struct *tty)
{
stliport_t *portp;
#if DEBUG
printk("stli_throttle(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
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)
{
stliport_t *portp;
#if DEBUG
printk("stli_unthrottle(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
clear_bit(ST_RXSTOP, &portp->state);
}
/*****************************************************************************/
/*
* Stop the transmitter. Basically to do this we will just turn TX
* interrupts off.
*/
static void stli_stop(struct tty_struct *tty)
{
stlibrd_t *brdp;
stliport_t *portp;
asyctrl_t actrl;
#if DEBUG
printk("stli_stop(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
memset(&actrl, 0, sizeof(asyctrl_t));
actrl.txctrl = CT_STOPFLOW;
#if 0
stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
#endif
}
/*****************************************************************************/
/*
* Start the transmitter again. Just turn TX interrupts back on.
*/
static void stli_start(struct tty_struct *tty)
{
stliport_t *portp;
stlibrd_t *brdp;
asyctrl_t actrl;
#if DEBUG
printk("stli_start(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
memset(&actrl, 0, sizeof(asyctrl_t));
actrl.txctrl = CT_STARTFLOW;
#if 0
stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
#endif
}
/*****************************************************************************/
/*
* Scheduler called hang up routine. This is called from the scheduler,
* not direct from the driver "poll" routine. We can't call it there
* since the real local hangup code will enable/disable the board and
* other things that we can't do while handling the poll. Much easier
* to deal with it some time later (don't really care when, hangups
* aren't that time critical).
*/
static void stli_dohangup(void *arg)
{
stliport_t *portp;
#if DEBUG
printk(KERN_DEBUG "stli_dohangup(portp=%x)n", (int) arg);
#endif
/*
* FIXME: There's a module removal race here: tty_hangup
* calls schedule_task which will call into this
* driver later.
*/
portp = (stliport_t *) arg;
if (portp != (stliport_t *) NULL) {
if (portp->tty != (struct tty_struct *) NULL) {
tty_hangup(portp->tty);
}
}
MOD_DEC_USE_COUNT;
}
/*****************************************************************************/
/*
* 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)
{
stliport_t *portp;
stlibrd_t *brdp;
unsigned long flags;
#if DEBUG
printk(KERN_DEBUG "stli_hangup(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
portp->flags &= ~ASYNC_INITIALIZED;
save_flags(flags);
cli();
if (! test_bit(ST_CLOSING, &portp->state))
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);
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);
}
}
restore_flags(flags);
clear_bit(ST_TXBUSY, &portp->state);
clear_bit(ST_RXSTOP, &portp->state);
set_bit(TTY_IO_ERROR, &tty->flags);
portp->tty = (struct tty_struct *) NULL;
portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
portp->refcount = 0;
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)
{
stliport_t *portp;
stlibrd_t *brdp;
unsigned long ftype, flags;
#if DEBUG
printk(KERN_DEBUG "stli_flushbuffer(tty=%x)n", (int) tty);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
save_flags(flags);
cli();
if (tty == stli_txcooktty) {
stli_txcooktty = (struct tty_struct *) NULL;
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);
}
stli_sendcmd(brdp, portp, A_FLUSH, &ftype,
sizeof(unsigned long), 0);
}
restore_flags(flags);
wake_up_interruptible(&tty->write_wait);
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
tty->ldisc.write_wakeup)
(tty->ldisc.write_wakeup)(tty);
}
/*****************************************************************************/
static void stli_breakctl(struct tty_struct *tty, int state)
{
stlibrd_t *brdp;
stliport_t *portp;
long arg;
/* long savestate, savetime; */
#if DEBUG
printk(KERN_DEBUG "stli_breakctl(tty=%x,state=%d)n", (int) tty, state);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
/*
* Due to a bug in the tty send_break() code we need to preserve
* the current process state and timeout...
savetime = current->timeout;
savestate = current->state;
*/
arg = (state == -1) ? BREAKON : BREAKOFF;
stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0);
/*
*
current->timeout = savetime;
current->state = savestate;
*/
}
/*****************************************************************************/
static void stli_waituntilsent(struct tty_struct *tty, int timeout)
{
stliport_t *portp;
unsigned long tend;
#if DEBUG
printk(KERN_DEBUG "stli_waituntilsent(tty=%x,timeout=%x)n", (int) tty, timeout);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if (timeout == 0)
timeout = HZ;
tend = jiffies + timeout;
while (test_bit(ST_TXBUSY, &portp->state)) {
if (signal_pending(current))
break;
stli_delay(2);
if (time_after_eq(jiffies, tend))
break;
}
}
/*****************************************************************************/
static void stli_sendxchar(struct tty_struct *tty, char ch)
{
stlibrd_t *brdp;
stliport_t *portp;
asyctrl_t actrl;
#if DEBUG
printk(KERN_DEBUG "stli_sendxchar(tty=%x,ch=%x)n", (int) tty, ch);
#endif
if (tty == (struct tty_struct *) NULL)
return;
portp = tty->driver_data;
if (portp == (stliport_t *) NULL)
return;
if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
return;
brdp = stli_brds[portp->brdnr];
if (brdp == (stlibrd_t *) NULL)
return;
memset(&actrl, 0, sizeof(asyctrl_t));
if (ch == STOP_CHAR(tty)) {
actrl.rxctrl = CT_STOPFLOW;
} else if (ch == START_CHAR(tty)) {
actrl.rxctrl = CT_STARTFLOW;
} else {
actrl.txctrl = CT_SENDCHR;
actrl.tximdch = ch;
}
stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t), 0);
}
/*****************************************************************************/
#define MAXLINE 80
/*
* Format info for a specified port. The line is deliberately limited
* to 80 characters. (If it is too long it will be truncated, if too
* short then padded with spaces).
*/
static int stli_portinfo(stlibrd_t *brdp, stliport_t *portp, int portnr, char *pos)
{
char *sp, *uart;
int rc, cnt;
rc = stli_portcmdstats(portp);
uart = "UNKNOWN";
if (brdp->state & BST_STARTED) {
switch (stli_comstats.hwid) {
case 0: uart = "2681"; break;
case 1: uart = "SC26198"; break;
default: uart = "CD1400"; break;
}
}
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)
{
stlibrd_t *brdp;
stliport_t *portp;
int brdnr, portnr, totalport;
int curoff, maxoff;
char *pos;
#if DEBUG
printk(KERN_DEBUG "stli_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
"data=%xn", (int) page, (int) start, (int) off, count,
(int) eof, (int) data);
#endif
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