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Diffstat (limited to 'drivers/char/istallion.c')
| -rw-r--r-- | drivers/char/istallion.c | 4650 |
1 files changed, 4650 insertions, 0 deletions
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c new file mode 100644 index 0000000..4b10770 --- /dev/null +++ b/drivers/char/istallion.c @@ -0,0 +1,4650 @@ +/*****************************************************************************/ + +/* + * 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> +#include <linux/eisa.h> +#include <linux/ctype.h> + +#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. + */ + +struct stlconf { + int brdtype; + int ioaddr1; + int ioaddr2; + unsigned long memaddr; + int irq; + int irqtype; +}; + +static unsigned int stli_nrbrds; + +/* 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 */ + +/* + * There is some experimental EISA board detection code in this driver. + * By default it is disabled, but for those that want to try it out, + * then set the define below to be 1. + */ +#define STLI_EISAPROBE 0 + +/*****************************************************************************/ + +/* + * Define some important driver characteristics. Device major numbers + * allocated as per Linux Device Registry. + */ +#ifndef STL_SIOMEMMAJOR +#define STL_SIOMEMMAJOR 28 +#endif +#ifndef STL_SERIALMAJOR +#define STL_SERIALMAJOR 24 +#endif +#ifndef STL_CALLOUTMAJOR +#define STL_CALLOUTMAJOR 25 +#endif + +/*****************************************************************************/ + +/* + * Define our local driver identity first. Set up stuff to deal with + * all the local structures required by a serial tty driver. + */ +static char *stli_drvtitle = "Stallion Intelligent Multiport Serial Driver"; +static char *stli_drvname = "istallion"; +static char *stli_drvversion = "5.6.0"; +static char *stli_serialname = "ttyE"; + +static struct tty_driver *stli_serial; + + +#define STLI_TXBUFSIZE 4096 + +/* + * Use a fast local buffer for cooked characters. Typically a whole + * bunch of cooked characters come in for a port, 1 at a time. So we + * save those up into a local buffer, then write out the whole lot + * with a large memcpy. Just use 1 buffer for all ports, since its + * use it is only need for short periods of time by each port. + */ +static char *stli_txcookbuf; +static int stli_txcooksize; +static int stli_txcookrealsize; +static struct tty_struct *stli_txcooktty; + +/* + * Define a local default termios struct. All ports will be created + * with this termios initially. Basically all it defines is a raw port + * at 9600 baud, 8 data bits, no parity, 1 stop bit. + */ +static struct ktermios stli_deftermios = { + .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), + .c_cc = INIT_C_CC, + .c_ispeed = 9600, + .c_ospeed = 9600, +}; + +/* + * 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 struct asystats stli_cdkstats; + +/*****************************************************************************/ + +static DEFINE_MUTEX(stli_brdslock); +static struct stlibrd *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 BST_PROBED 0x4 + +/* + * 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", + NULL, + "ONboard", + "ONboard-MC", + "ONboard-MC", + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + NULL, + "EasyIO", + "EC8/32-AT", + "EC8/32-MC", + "EC8/64-AT", + "EC8/64-EI", + "EC8/64-MC", + "EC8/32-PCI", + "EC8/64-PCI", + "EasyIO-PCI", + "EC/RA-PCI", +}; + +/*****************************************************************************/ + +/* + * Define some string labels for arguments passed from the module + * load line. These allow for easy board definitions, and easy + * modification of the io, memory and irq resoucres. + */ + +static char *board0[8]; +static char *board1[8]; +static char *board2[8]; +static char *board3[8]; + +static char **stli_brdsp[] = { + (char **) &board0, + (char **) &board1, + (char **) &board2, + (char **) &board3 +}; + +/* + * Define a set of common board names, and types. This is used to + * parse any module arguments. + */ + +static struct stlibrdtype { + char *name; + int type; +} 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_param_array(board0, charp, NULL, 0); +MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]"); +module_param_array(board1, charp, NULL, 0); +MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]"); +module_param_array(board2, charp, NULL, 0); +MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]"); +module_param_array(board3, charp, NULL, 0); +MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]"); + +#if STLI_EISAPROBE != 0 +/* + * 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 = ARRAY_SIZE(stli_eisamemprobeaddrs); +#endif + +/* + * 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[] = { + { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECRA), }, + { 0 } +}; +MODULE_DEVICE_TABLE(pci, istallion_pci_tbl); + +static struct pci_driver stli_pcidriver; + +/*****************************************************************************/ + +/* + * 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! + */ + +static int stli_parsebrd(struct stlconf *confp, char **argp); +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 int 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 ktermios *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 int 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(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos); + +static int stli_brdinit(struct stlibrd *brdp); +static int stli_startbrd(struct stlibrd *brdp); +static ssize_t stli_memread(struct file *fp, char __user *buf, size_t count, loff_t *offp); +static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp); +static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); +static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp); +static void stli_poll(unsigned long arg); +static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp); +static int stli_initopen(struct tty_struct *tty, 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 tty_struct *tty, struct stlibrd *brdp, + struct stliport *portp, struct file *filp); +static int stli_setport(struct tty_struct *tty); +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 tty_struct *tty, struct stliport *portp, asyport_t *pp, struct ktermios *tiosp); +static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts); +static long stli_mktiocm(unsigned long sigvalue); +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 tty_struct *tty, struct serial_struct __user *sp); +static int stli_getbrdstats(combrd_t __user *bp); +static int stli_getportstats(struct tty_struct *tty, struct stliport *portp, comstats_t __user *cp); +static int stli_portcmdstats(struct tty_struct *tty, 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); + +static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr, unsigned int portnr); + +static int stli_initecp(struct stlibrd *brdp); +static int stli_initonb(struct stlibrd *brdp); +#if STLI_EISAPROBE != 0 +static int stli_eisamemprobe(struct stlibrd *brdp); +#endif +static int stli_initports(struct stlibrd *brdp); + +/*****************************************************************************/ + +/* + * 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 const 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 DEFINE_TIMER(stli_timerlist, stli_poll, 0, 0); + +static int stli_timeron; + +/* + * Define the calculation for the timeout routine. + */ +#define STLI_TIMEOUT (jiffies + 1) + +/*****************************************************************************/ + +static struct class *istallion_class; + +static void stli_cleanup_ports(struct stlibrd *brdp) +{ + struct stliport *portp; + unsigned int j; + struct tty_struct *tty; + + for (j = 0; j < STL_MAXPORTS; j++) { + portp = brdp->ports[j]; + if (portp != NULL) { + tty = tty_port_tty_get(&portp->port); + if (tty != NULL) { + tty_hangup(tty); + tty_kref_put(tty); + } + kfree(portp); + } + } +} + +/*****************************************************************************/ + +/* + * Parse the supplied argument string, into the board conf struct. + */ + +static int stli_parsebrd(struct stlconf *confp, char **argp) +{ + unsigned int i; + char *sp; + + if (argp[0] == NULL || *argp[0] == 0) + return 0; + + for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) + *sp = tolower(*sp); + + for (i = 0; i < ARRAY_SIZE(stli_brdstr); i++) { + if (strcmp(stli_brdstr[i].name, argp[0]) == 0) + break; + } + if (i == ARRAY_SIZE(stli_brdstr)) { + printk("STALLION: unknown board name, %s?\n", argp[0]); + return 0; + } + + confp->brdtype = stli_brdstr[i].type; + if (argp[1] != NULL && *argp[1] != 0) + confp->ioaddr1 = simple_strtoul(argp[1], NULL, 0); + if (argp[2] != NULL && *argp[2] != 0) + confp->memaddr = simple_strtoul(argp[2], NULL, 0); + return(1); +} + +/*****************************************************************************/ + +static int stli_open(struct tty_struct *tty, struct file *filp) +{ + struct stlibrd *brdp; + struct stliport *portp; + unsigned int minordev, brdnr, portnr; + int rc; + + minordev = tty->index; + brdnr = MINOR2BRD(minordev); + if (brdnr >= stli_nrbrds) + return -ENODEV; + brdp = stli_brds[brdnr]; + if (brdp == NULL) + return -ENODEV; + if ((brdp->state & BST_STARTED) == 0) + return -ENODEV; + portnr = MINOR2PORT(minordev); + if (portnr > brdp->nrports) + return -ENODEV; + + portp = brdp->ports[portnr]; + if (portp == NULL) + return -ENODEV; + if (portp->devnr < 1) + return -ENODEV; + + +/* + * 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->port.flags & ASYNC_CLOSING) { + interruptible_sleep_on(&portp->port.close_wait); + if (portp->port.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. + */ + tty_port_tty_set(&portp->port, tty); + tty->driver_data = portp; + portp->port.count++; + + wait_event_interruptible(portp->raw_wait, + !test_bit(ST_INITIALIZING, &portp->state)); + if (signal_pending(current)) + return -ERESTARTSYS; + + if ((portp->port.flags & ASYNC_INITIALIZED) == 0) { + set_bit(ST_INITIALIZING, &portp->state); + if ((rc = stli_initopen(tty, brdp, portp)) >= 0) { + portp->port.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->port.flags & ASYNC_CLOSING) { + interruptible_sleep_on(&portp->port.close_wait); + if (portp->port.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 (!(filp->f_flags & O_NONBLOCK)) { + if ((rc = stli_waitcarrier(tty, brdp, portp, filp)) != 0) + return rc; + } + portp->port.flags |= ASYNC_NORMAL_ACTIVE; + return 0; +} + +/*****************************************************************************/ + +static void stli_close(struct tty_struct *tty, struct file *filp) +{ + struct stlibrd *brdp; + struct stliport *portp; + unsigned long flags; + + portp = tty->driver_data; + if (portp == NULL) + return; + + spin_lock_irqsave(&stli_lock, flags); + if (tty_hung_up_p(filp)) { + spin_unlock_irqrestore(&stli_lock, flags); + return; + } + if ((tty->count == 1) && (portp->port.count != 1)) + portp->port.count = 1; + if (portp->port.count-- > 1) { + spin_unlock_irqrestore(&stli_lock, flags); + return; + } + + portp->port.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; + spin_unlock_irqrestore(&stli_lock, flags); + + if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) + tty_wait_until_sent(tty, portp->closing_wait); + + portp->port.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); + tty_ldisc_flush(tty); + set_bit(ST_DOFLUSHRX, &portp->state); + stli_flushbuffer(tty); + + tty->closing = 0; + tty_port_tty_set(&portp->port, NULL); + + if (portp->openwaitcnt) { + if (portp->close_delay) + msleep_interruptible(jiffies_to_msecs(portp->close_delay)); + wake_up_interruptible(&portp->port.open_wait); + } + + portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + wake_up_interruptible(&portp->port.close_wait); +} + +/*****************************************************************************/ + +/* + * Carry out first open operations on a port. This involves a number of + * commands to be sent to the slave. We need to open the port, set the + * notification events, set the initial port settings, get and set the + * initial signal values. We sleep and wait in between each one. But + * this still all happens pretty quickly. + */ + +static int stli_initopen(struct tty_struct *tty, + struct stlibrd *brdp, struct stliport *portp) +{ + asynotify_t nt; + asyport_t aport; + int rc; + + 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; + + stli_mkasyport(tty, 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(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait) +{ + cdkhdr_t __iomem *hdrp; + cdkctrl_t __iomem *cp; + unsigned char __iomem *bits; + unsigned long flags; + int rc; + +/* + * 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. + */ + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + 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 + + portp->portidx; + writeb(readb(bits) | portp->portbit, bits); + EBRDDISABLE(brdp); + + if (wait == 0) { + spin_unlock_irqrestore(&brd_lock, 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); + spin_unlock_irqrestore(&brd_lock, flags); + + 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; + 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(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait) +{ + cdkhdr_t __iomem *hdrp; + cdkctrl_t __iomem *cp; + unsigned char __iomem *bits; + unsigned long flags; + int rc; + +/* + * 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. + */ + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + 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 + + portp->portidx; + writeb(readb(bits) |portp->portbit, bits); + EBRDDISABLE(brdp); + + set_bit(ST_CLOSING, &portp->state); + spin_unlock_irqrestore(&brd_lock, flags); + + if (wait == 0) + return 0; + +/* + * 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; + 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(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback) +{ + wait_event_interruptible(portp->raw_wait, + !test_bit(ST_CMDING, &portp->state)); + if (signal_pending(current)) + return -ERESTARTSYS; + + stli_sendcmd(brdp, portp, cmd, arg, size, copyback); + + wait_event_interruptible(portp->raw_wait, + !test_bit(ST_CMDING, &portp->state)); + if (signal_pending(current)) + return -ERESTARTSYS; + + 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(struct tty_struct *tty) +{ + struct stliport *portp = tty->driver_data; + struct stlibrd *brdp; + asyport_t aport; + + if (portp == NULL) + return -ENODEV; + if (portp->brdnr >= stli_nrbrds) + return -ENODEV; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return -ENODEV; + + stli_mkasyport(tty, portp, &aport, tty->termios); + return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0)); +} + +/*****************************************************************************/ + +/* + * Possibly need to wait for carrier (DCD signal) to come high. Say + * maybe because if we are clocal then we don't need to wait... + */ + +static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp, + struct stliport *portp, struct file *filp) +{ + unsigned long flags; + int rc, doclocal; + + rc = 0; + doclocal = 0; + + if (tty->termios->c_cflag & CLOCAL) + doclocal++; + + spin_lock_irqsave(&stli_lock, flags); + portp->openwaitcnt++; + if (! tty_hung_up_p(filp)) + portp->port.count--; + spin_unlock_irqrestore(&stli_lock, flags); + + 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->port.flags & ASYNC_INITIALIZED) == 0)) { + if (portp->port.flags & ASYNC_HUP_NOTIFY) + rc = -EBUSY; + else + rc = -ERESTARTSYS; + break; + } + if (((portp->port.flags & ASYNC_CLOSING) == 0) && + (doclocal || (portp->sigs & TIOCM_CD))) { + break; + } + if (signal_pending(current)) { + rc = -ERESTARTSYS; + break; + } + interruptible_sleep_on(&portp->port.open_wait); + } + + spin_lock_irqsave(&stli_lock, flags); + if (! tty_hung_up_p(filp)) + portp->port.count++; + portp->openwaitcnt--; + spin_unlock_irqrestore(&stli_lock, 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, const unsigned char *buf, int count) +{ + cdkasy_t __iomem *ap; + cdkhdr_t __iomem *hdrp; + unsigned char __iomem *bits; + unsigned char __iomem *shbuf; + unsigned char *chbuf; + struct stliport *portp; + struct stlibrd *brdp; + unsigned int len, stlen, head, tail, size; + unsigned long flags; + + if (tty == stli_txcooktty) + stli_flushchars(tty); + portp = tty->driver_data; + if (portp == NULL) + return 0; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return 0; + chbuf = (unsigned char *) buf; + +/* + * All data is now local, shove as much as possible into shared memory. + */ + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + 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); + size = portp->txsize; + if (head >= tail) { + len = size - (head - tail) - 1; + stlen = size - head; + } else { + len = tail - head - 1; + stlen = len; + } + + len = min(len, (unsigned int)count); + count = 0; + shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->txoffset); + + while (len > 0) { + stlen = min(len, stlen); + memcpy_toio(shbuf + head, chbuf, stlen); + chbuf += stlen; + len -= stlen; + count += stlen; + head += stlen; + if (head >= size) { + head = 0; + stlen = tail; + } + } + + ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr); + writew(head, &ap->txq.head); + if (test_bit(ST_TXBUSY, &portp->state)) { + if (readl(&ap->changed.data) & DT_TXEMPTY) + writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data); + } + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset + + portp->portidx; + writeb(readb(bits) | portp->portbit, bits); + set_bit(ST_TXBUSY, &portp->state); + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, 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 int stli_putchar(struct tty_struct *tty, unsigned char ch) +{ + if (tty != stli_txcooktty) { + if (stli_txcooktty != NULL) + stli_flushchars(stli_txcooktty); + stli_txcooktty = tty; + } + + stli_txcookbuf[stli_txcooksize++] = ch; + return 0; +} + +/*****************************************************************************/ + +/* + * 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) +{ + cdkhdr_t __iomem *hdrp; + unsigned char __iomem *bits; + cdkasy_t __iomem *ap; + struct tty_struct *cooktty; + struct stliport *portp; + struct stlibrd *brdp; + unsigned int len, stlen, head, tail, size, count, cooksize; + unsigned char *buf; + unsigned char __iomem *shbuf; + unsigned long flags; + + cooksize = stli_txcooksize; + cooktty = stli_txcooktty; + stli_txcooksize = 0; + stli_txcookrealsize = 0; + stli_txcooktty = NULL; + + if (cooktty == NULL) + return; + if (tty != cooktty) + tty = cooktty; + if (cooksize == 0) + return; + + portp = tty->driver_data; + if (portp == NULL) + return; + if (portp->brdnr >= stli_nrbrds) + return; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return; + + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + + 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); + 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 = EBRDGETMEMPTR(brdp, portp->txoffset); + buf = stli_txcookbuf; + + while (len > 0) { + stlen = min(len, stlen); + memcpy_toio(shbuf + head, buf, stlen); + buf += stlen; + len -= stlen; + count += stlen; + head += stlen; + if (head >= size) { + head = 0; + stlen = tail; + } + } + + ap = (cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr); + writew(head, &ap->txq.head); + + if (test_bit(ST_TXBUSY, &portp->state)) { + if (readl(&ap->changed.data) & DT_TXEMPTY) + writel(readl(&ap->changed.data) & ~DT_TXEMPTY, &ap->changed.data); + } + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset + + portp->portidx; + writeb(readb(bits) | portp->portbit, bits); + set_bit(ST_TXBUSY, &portp->state); + + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, flags); +} + +/*****************************************************************************/ + +static int stli_writeroom(struct tty_struct *tty) +{ + cdkasyrq_t __iomem *rp; + struct stliport *portp; + struct stlibrd *brdp; + unsigned int head, tail, len; + unsigned long flags; + + if (tty == stli_txcooktty) { + if (stli_txcookrealsize != 0) { + len = stli_txcookrealsize - stli_txcooksize; + return len; + } + } + + portp = tty->driver_data; + if (portp == NULL) + return 0; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return 0; + + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + 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); + len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head); + len--; + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, 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) +{ + cdkasyrq_t __iomem *rp; + struct stliport *portp; + struct stlibrd *brdp; + unsigned int head, tail, len; + unsigned long flags; + + if (tty == stli_txcooktty) + stli_flushchars(tty); + portp = tty->driver_data; + if (portp == NULL) + return 0; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return 0; + + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + 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); + len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head)); + if ((len == 0) && test_bit(ST_TXBUSY, &portp->state)) + len = 1; + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, flags); + + return len; +} + +/*****************************************************************************/ + +/* + * Generate the serial struct info. + */ + +static int stli_getserial(struct stliport *portp, struct serial_struct __user *sp) +{ + struct serial_struct sio; + struct stlibrd *brdp; + + memset(&sio, 0, sizeof(struct serial_struct)); + sio.type = PORT_UNKNOWN; + sio.line = portp->portnr; + sio.irq = 0; + sio.flags = portp->port.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 != NULL) + sio.port = brdp->iobase; + + return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? + -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Set port according to the serial struct info. + * At this point we do not do any auto-configure stuff, so we will + * just quietly ignore any requests to change irq, etc. + */ + +static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *sp) +{ + struct serial_struct sio; + int rc; + struct stliport *portp = tty->driver_data; + + 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->port.flags & ~ASYNC_USR_MASK))) + return -EPERM; + } + + portp->port.flags = (portp->port.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(tty)) < 0) + return rc; + return 0; +} + +/*****************************************************************************/ + +static int stli_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct stliport *portp = tty->driver_data; + struct stlibrd *brdp; + int rc; + + if (portp == NULL) + return -ENODEV; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return 0; + if (tty->flags & (1 << TTY_IO_ERROR)) + return -EIO; + + if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, + &portp->asig, sizeof(asysigs_t), 1)) < 0) + return rc; + + return stli_mktiocm(portp->asig.sigvalue); +} + +static int stli_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct stliport *portp = tty->driver_data; + struct stlibrd *brdp; + int rts = -1, dtr = -1; + + if (portp == NULL) + return -ENODEV; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return 0; + if (tty->flags & (1 << TTY_IO_ERROR)) + return -EIO; + + 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) +{ + struct stliport *portp; + struct stlibrd *brdp; + int rc; + void __user *argp = (void __user *)arg; + + portp = tty->driver_data; + if (portp == NULL) + return -ENODEV; + if (portp->brdnr >= stli_nrbrds) + return 0; + brdp = stli_brds[portp->brdnr]; + if (brdp == 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 TIOCGSERIAL: + rc = stli_getserial(portp, argp); + break; + case TIOCSSERIAL: + rc = stli_setserial(tty, 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(tty); + break; + case COM_GETPORTSTATS: + rc = stli_getportstats(tty, 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; + } + + 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 ktermios *old) +{ + struct stliport *portp; + struct stlibrd *brdp; + struct ktermios *tiosp; + asyport_t aport; + + portp = tty->driver_data; + if (portp == NULL) + return; + if (portp->brdnr >= stli_nrbrds) + return; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return; + + tiosp = tty->termios; + + stli_mkasyport(tty, 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->port.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) +{ + struct stliport *portp = tty->driver_data; + if (portp == 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) +{ + struct stliport *portp = tty->driver_data; + if (portp == NULL) + return; + clear_bit(ST_RXSTOP, &portp->state); +} + +/*****************************************************************************/ + +/* + * Stop the transmitter. + */ + +static void stli_stop(struct tty_struct *tty) +{ +} + +/*****************************************************************************/ + +/* + * Start the transmitter again. + */ + +static void stli_start(struct tty_struct *tty) +{ +} + +/*****************************************************************************/ + +/* + * 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) +{ + struct stliport *portp; + struct stlibrd *brdp; + unsigned long flags; + + portp = tty->driver_data; + if (portp == NULL) + return; + if (portp->brdnr >= stli_nrbrds) + return; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return; + + portp->port.flags &= ~ASYNC_INITIALIZED; + + if (!test_bit(ST_CLOSING, &portp->state)) + stli_rawclose(brdp, portp, 0, 0); + + spin_lock_irqsave(&stli_lock, flags); + 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); + tty_port_tty_set(&portp->port, NULL); + portp->port.flags &= ~ASYNC_NORMAL_ACTIVE; + portp->port.count = 0; + spin_unlock_irqrestore(&stli_lock, flags); + + wake_up_interruptible(&portp->port.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) +{ + struct stliport *portp; + struct stlibrd *brdp; + unsigned long ftype, flags; + + portp = tty->driver_data; + if (portp == NULL) + return; + if (portp->brdnr >= stli_nrbrds) + return; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return; + + spin_lock_irqsave(&brd_lock, flags); + if (tty == stli_txcooktty) { + stli_txcooktty = 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(u32), 0); + } + spin_unlock_irqrestore(&brd_lock, flags); + tty_wakeup(tty); +} + +/*****************************************************************************/ + +static int stli_breakctl(struct tty_struct *tty, int state) +{ + struct stlibrd *brdp; + struct stliport *portp; + long arg; + + portp = tty->driver_data; + if (portp == NULL) + return -EINVAL; + if (portp->brdnr >= stli_nrbrds) + return -EINVAL; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return -EINVAL; + + arg = (state == -1) ? BREAKON : BREAKOFF; + stli_cmdwait(brdp, portp, A_BREAK, &arg, sizeof(long), 0); + return 0; +} + +/*****************************************************************************/ + +static void stli_waituntilsent(struct tty_struct *tty, int timeout) +{ + struct stliport *portp; + unsigned long tend; + + portp = tty->driver_data; + if (portp == NULL) + 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) +{ + struct stlibrd *brdp; + struct stliport *portp; + asyctrl_t actrl; + + portp = tty->driver_data; + if (portp == NULL) + return; + if (portp->brdnr >= stli_nrbrds) + return; + brdp = stli_brds[portp->brdnr]; + if (brdp == 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(struct stlibrd *brdp, struct stliport *portp, int portnr, char *pos) +{ + char *sp, *uart; + int rc, cnt; + + rc = stli_portcmdstats(NULL, 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) +{ + struct stlibrd *brdp; + struct stliport *portp; + unsigned int brdnr, portnr, totalport; + int curoff, maxoff; + char *pos; + + 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]; + if (brdp == NULL) + 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]; + if (portp == NULL) + 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. + * + * The caller must hold the brd_lock (see also stli_sendcmd the usual + * entry point) + */ + +static void __stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback) +{ + cdkhdr_t __iomem *hdrp; + cdkctrl_t __iomem *cp; + unsigned char __iomem *bits; + + if (test_bit(ST_CMDING, &portp->state)) { + printk(KERN_ERR "STALLION: command already busy, cmd=%x!\n", + (int) cmd); + return; + } + + EBRDENABLE(brdp); + cp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl; + if (size > 0) { + memcpy_toio((void __iomem *) &(cp->args[0]), arg, size); + if (copyback) { + portp->argp = arg; + portp->argsize = size; + } + } + writel(0, &cp->status); + writel(cmd, &cp->cmd); + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + bits = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset + + portp->portidx; + writeb(readb(bits) | portp->portbit, bits); + set_bit(ST_CMDING, &portp->state); + EBRDDISABLE(brdp); +} + +static void stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback) +{ + unsigned long flags; + + spin_lock_irqsave(&brd_lock, flags); + __stli_sendcmd(brdp, portp, cmd, arg, size, copyback); + spin_unlock_irqrestore(&brd_lock, flags); +} + +/*****************************************************************************/ + +/* + * Read data from shared memory. This assumes that the shared memory + * is enabled and that interrupts are off. Basically we just empty out + * the shared memory buffer into the tty buffer. Must be careful to + * handle the case where we fill up the tty buffer, but still have + * more chars to unload. + */ + +static void stli_read(struct stlibrd *brdp, struct stliport *portp) +{ + cdkasyrq_t __iomem *rp; + char __iomem *shbuf; + struct tty_struct *tty; + unsigned int head, tail, size; + unsigned int len, stlen; + + if (test_bit(ST_RXSTOP, &portp->state)) + return; + tty = tty_port_tty_get(&portp->port); + if (tty == NULL) + return; + + 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); + size = portp->rxsize; + if (head >= tail) { + len = head - tail; + stlen = len; + } else { + len = size - (tail - head); + stlen = size - tail; + } + + len = tty_buffer_request_room(tty, len); + + shbuf = (char __iomem *) EBRDGETMEMPTR(brdp, portp->rxoffset); + + while (len > 0) { + unsigned char *cptr; + + stlen = min(len, stlen); + tty_prepare_flip_string(tty, &cptr, stlen); + memcpy_fromio(cptr, shbuf + tail, stlen); + len -= stlen; + tail += stlen; + if (tail >= size) { + tail = 0; + stlen = head; + } + } + rp = &((cdkasy_t __iomem *) EBRDGETMEMPTR(brdp, portp->addr))->rxq; + writew(tail, &rp->tail); + + if (head != tail) + set_bit(ST_RXING, &portp->state); + + tty_schedule_flip(tty); + tty_kref_put(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. + */ + +static void stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp) +{ + int cmd; + + 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); + memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &portp->asig, + sizeof(asysigs_t)); + writel(0, &cp->status); + writel(cmd, &cp->cmd); + 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); + memcpy_toio((void __iomem *) &(cp->args[0]), (void *) &cmd, sizeof(int)); + writel(0, &cp->status); + writel(A_FLUSH, &cp->cmd); + set_bit(ST_CMDING, &portp->state); + } +} + +/*****************************************************************************/ + +/* + * Host command service checking. This handles commands or messages + * coming from the slave to the host. Must have board shared memory + * enabled and interrupts off when called. Notice that by servicing the + * read data last we don't need to change the shared memory pointer + * during processing (which is a slow IO operation). + * Return value indicates if this port is still awaiting actions from + * the slave (like open, command, or even TX data being sent). If 0 + * then port is still busy, otherwise no longer busy. + */ + +static int stli_hostcmd(struct stlibrd *brdp, struct stliport *portp) +{ + 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); + cp = &ap->ctrl; + +/* + * Check if we are waiting for an open completion message. + */ + if (test_bit(ST_OPENING, &portp->state)) { + rc = readl(&cp->openarg); + if (readb(&cp->open) == 0 && rc != 0) { + if (rc > 0) + rc--; + writel(0, &cp->openarg); + 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)) { + rc = (int) readl(&cp->closearg); + if (readb(&cp->close) == 0 && rc != 0) { + if (rc > 0) + rc--; + writel(0, &cp->closearg); + 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)) { + rc = readl(&cp->status); + if (readl(&cp->cmd) == 0 && rc != 0) { + if (rc > 0) + rc--; + if (portp->argp != NULL) { + memcpy_fromio(portp->argp, (void __iomem *) &(cp->args[0]), + portp->argsize); + portp->argp = NULL; + } + writel(0, &cp->status); + 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 = tty_port_tty_get(&portp->port); + + 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->port.open_wait); + if ((oldsigs & TIOCM_CD) && + ((portp->sigs & TIOCM_CD) == 0)) { + if (portp->port.flags & ASYNC_CHECK_CD) { + if (tty) + tty_hangup(tty); + } + } + } + + if (nt.data & DT_TXEMPTY) + clear_bit(ST_TXBUSY, &portp->state); + if (nt.data & (DT_TXEMPTY | DT_TXLOW)) { + if (tty != NULL) { + tty_wakeup(tty); + EBRDENABLE(brdp); + } + } + + if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) { + if (tty != NULL) { + tty_insert_flip_char(tty, 0, TTY_BREAK); + if (portp->port.flags & ASYNC_SAK) { + do_SAK(tty); + EBRDENABLE(brdp); + } + tty_schedule_flip(tty); + } + } + tty_kref_put(tty); + + 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. + */ + +static void stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp) +{ + struct stliport *portp; + unsigned char hostbits[(STL_MAXCHANS / 8) + 1]; + unsigned char slavebits[(STL_MAXCHANS / 8) + 1]; + unsigned char __iomem *slavep; + int bitpos, bitat, bitsize; + int channr, nrdevs, slavebitchange; + + 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. + */ + memcpy_fromio(&hostbits[0], (((unsigned char __iomem *) hdrp) + brdp->hostoffset), + 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) { + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + slavep = ((unsigned char __iomem *) hdrp) + brdp->slaveoffset; + for (bitpos = 0; (bitpos < bitsize); bitpos++) { + if (readb(slavebits + bitpos)) + writeb(readb(slavep + bitpos) & ~slavebits[bitpos], slavebits + bitpos); + } + } +} + +/*****************************************************************************/ + +/* + * 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) +{ + cdkhdr_t __iomem *hdrp; + struct stlibrd *brdp; + unsigned int brdnr; + + mod_timer(&stli_timerlist, STLI_TIMEOUT); + +/* + * Check each board and do any servicing required. + */ + for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) { + brdp = stli_brds[brdnr]; + if (brdp == NULL) + continue; + if ((brdp->state & BST_STARTED) == 0) + continue; + + spin_lock(&brd_lock); + EBRDENABLE(brdp); + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + if (readb(&hdrp->hostreq)) + stli_brdpoll(brdp, hdrp); + EBRDDISABLE(brdp); + spin_unlock(&brd_lock); + } +} + +/*****************************************************************************/ + +/* + * Translate the termios settings into the port setting structure of + * the slave. + */ + +static void stli_mkasyport(struct tty_struct *tty, struct stliport *portp, + asyport_t *pp, struct ktermios *tiosp) +{ + memset(pp, 0, sizeof(asyport_t)); + +/* + * Start of by setting the baud, char size, parity and stop bit info. + */ + pp->baudout = tty_get_baud_rate(tty); + if ((tiosp->c_cflag & CBAUD) == B38400) { + if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + pp->baudout = 57600; + else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + pp->baudout = 115200; + else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) + pp->baudout = 230400; + else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) + pp->baudout = 460800; + else if ((portp->port.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->port.flags &= ~ASYNC_CHECK_CD; + else + portp->port.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) +{ + long tiocm = 0; + tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0); + tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0); + tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0); + tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0); + tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0); + tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0); + return(tiocm); +} + +/*****************************************************************************/ + +/* + * All panels and ports actually attached have been worked out. All + * we need to do here is set up the appropriate per port data structures. + */ + +static int stli_initports(struct stlibrd *brdp) +{ + struct stliport *portp; + unsigned int i, panelnr, panelport; + + for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) { + portp = kzalloc(sizeof(struct stliport), GFP_KERNEL); + if (!portp) { + printk("STALLION: failed to allocate port structure\n"); + continue; + } + tty_port_init(&portp->port); + portp->magic = STLI_PORTMAGIC; + portp->portnr = i; + portp->brdnr = brdp->brdnr; + portp->panelnr = panelnr; + portp->baud_base = STL_BAUDBASE; + portp->close_delay = STL_CLOSEDELAY; + portp->closing_wait = 30 * HZ; + init_waitqueue_head(&portp->port.open_wait); + init_waitqueue_head(&portp->port.close_wait); + init_waitqueue_head(&portp->raw_wait); + panelport++; + if (panelport >= brdp->panels[panelnr]) { + panelport = 0; + panelnr++; + } + brdp->ports[i] = portp; + } + + return 0; +} + +/*****************************************************************************/ + +/* + * All the following routines are board specific hardware operations. + */ + +static void stli_ecpinit(struct stlibrd *brdp) +{ + unsigned long memconf; + + outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR)); + udelay(10); + outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR)); + udelay(100); + + memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT; + outb(memconf, (brdp->iobase + ECP_ATMEMAR)); +} + +/*****************************************************************************/ + +static void stli_ecpenable(struct stlibrd *brdp) +{ + outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR)); +} + +/*****************************************************************************/ + +static void stli_ecpdisable(struct stlibrd *brdp) +{ + outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR)); +} + +/*****************************************************************************/ + +static void __iomem *stli_ecpgetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), brd=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + val = 0; + } else { + ptr = brdp->membase + (offset % ECP_ATPAGESIZE); + val = (unsigned char) (offset / ECP_ATPAGESIZE); + } + outb(val, (brdp->iobase + ECP_ATMEMPR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_ecpreset(struct stlibrd *brdp) +{ + outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR)); + udelay(10); + outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR)); + udelay(500); +} + +/*****************************************************************************/ + +static void stli_ecpintr(struct stlibrd *brdp) +{ + outb(0x1, brdp->iobase); +} + +/*****************************************************************************/ + +/* + * The following set of functions act on ECP EISA boards. + */ + +static void stli_ecpeiinit(struct stlibrd *brdp) +{ + unsigned long memconf; + + outb(0x1, (brdp->iobase + ECP_EIBRDENAB)); + outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR)); + udelay(10); + outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR)); + udelay(500); + + memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL; + outb(memconf, (brdp->iobase + ECP_EIMEMARL)); + memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH; + outb(memconf, (brdp->iobase + ECP_EIMEMARH)); +} + +/*****************************************************************************/ + +static void stli_ecpeienable(struct stlibrd *brdp) +{ + outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR)); +} + +/*****************************************************************************/ + +static void stli_ecpeidisable(struct stlibrd *brdp) +{ + outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR)); +} + +/*****************************************************************************/ + +static void __iomem *stli_ecpeigetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), brd=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + val = 0; + } else { + ptr = brdp->membase + (offset % ECP_EIPAGESIZE); + if (offset < ECP_EIPAGESIZE) + val = ECP_EIENABLE; + else + val = ECP_EIENABLE | 0x40; + } + outb(val, (brdp->iobase + ECP_EICONFR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_ecpeireset(struct stlibrd *brdp) +{ + outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR)); + udelay(10); + outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR)); + udelay(500); +} + +/*****************************************************************************/ + +/* + * The following set of functions act on ECP MCA boards. + */ + +static void stli_ecpmcenable(struct stlibrd *brdp) +{ + outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR)); +} + +/*****************************************************************************/ + +static void stli_ecpmcdisable(struct stlibrd *brdp) +{ + outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR)); +} + +/*****************************************************************************/ + +static void __iomem *stli_ecpmcgetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), brd=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + val = 0; + } else { + ptr = brdp->membase + (offset % ECP_MCPAGESIZE); + val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE; + } + outb(val, (brdp->iobase + ECP_MCCONFR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_ecpmcreset(struct stlibrd *brdp) +{ + outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR)); + udelay(10); + outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR)); + udelay(500); +} + +/*****************************************************************************/ + +/* + * The following set of functions act on ECP PCI boards. + */ + +static void stli_ecppciinit(struct stlibrd *brdp) +{ + outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR)); + udelay(10); + outb(0, (brdp->iobase + ECP_PCICONFR)); + udelay(500); +} + +/*****************************************************************************/ + +static void __iomem *stli_ecppcigetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), board=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + val = 0; + } else { + ptr = brdp->membase + (offset % ECP_PCIPAGESIZE); + val = (offset / ECP_PCIPAGESIZE) << 1; + } + outb(val, (brdp->iobase + ECP_PCICONFR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_ecppcireset(struct stlibrd *brdp) +{ + outb(ECP_PCISTOP, (brdp->iobase + ECP_PCICONFR)); + udelay(10); + outb(0, (brdp->iobase + ECP_PCICONFR)); + udelay(500); +} + +/*****************************************************************************/ + +/* + * The following routines act on ONboards. + */ + +static void stli_onbinit(struct stlibrd *brdp) +{ + unsigned long memconf; + + outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR)); + udelay(10); + outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR)); + mdelay(1000); + + memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT; + outb(memconf, (brdp->iobase + ONB_ATMEMAR)); + outb(0x1, brdp->iobase); + mdelay(1); +} + +/*****************************************************************************/ + +static void stli_onbenable(struct stlibrd *brdp) +{ + outb((brdp->enabval | ONB_ATENABLE), (brdp->iobase + ONB_ATCONFR)); +} + +/*****************************************************************************/ + +static void stli_onbdisable(struct stlibrd *brdp) +{ + outb((brdp->enabval | ONB_ATDISABLE), (brdp->iobase + ONB_ATCONFR)); +} + +/*****************************************************************************/ + +static void __iomem *stli_onbgetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), brd=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + } else { + ptr = brdp->membase + (offset % ONB_ATPAGESIZE); + } + return(ptr); +} + +/*****************************************************************************/ + +static void stli_onbreset(struct stlibrd *brdp) +{ + outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR)); + udelay(10); + outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR)); + mdelay(1000); +} + +/*****************************************************************************/ + +/* + * The following routines act on ONboard EISA. + */ + +static void stli_onbeinit(struct stlibrd *brdp) +{ + unsigned long memconf; + + outb(0x1, (brdp->iobase + ONB_EIBRDENAB)); + outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR)); + udelay(10); + outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR)); + mdelay(1000); + + memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL; + outb(memconf, (brdp->iobase + ONB_EIMEMARL)); + memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH; + outb(memconf, (brdp->iobase + ONB_EIMEMARH)); + outb(0x1, brdp->iobase); + mdelay(1); +} + +/*****************************************************************************/ + +static void stli_onbeenable(struct stlibrd *brdp) +{ + outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR)); +} + +/*****************************************************************************/ + +static void stli_onbedisable(struct stlibrd *brdp) +{ + outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR)); +} + +/*****************************************************************************/ + +static void __iomem *stli_onbegetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + if (offset > brdp->memsize) { + printk(KERN_ERR "STALLION: shared memory pointer=%x out of " + "range at line=%d(%d), brd=%d\n", + (int) offset, line, __LINE__, brdp->brdnr); + ptr = NULL; + val = 0; + } else { + ptr = brdp->membase + (offset % ONB_EIPAGESIZE); + if (offset < ONB_EIPAGESIZE) + val = ONB_EIENABLE; + else + val = ONB_EIENABLE | 0x40; + } + outb(val, (brdp->iobase + ONB_EICONFR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_onbereset(struct stlibrd *brdp) +{ + outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR)); + udelay(10); + outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR)); + mdelay(1000); +} + +/*****************************************************************************/ + +/* + * The following routines act on Brumby boards. + */ + +static void stli_bbyinit(struct stlibrd *brdp) +{ + outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR)); + udelay(10); + outb(0, (brdp->iobase + BBY_ATCONFR)); + mdelay(1000); + outb(0x1, brdp->iobase); + mdelay(1); +} + +/*****************************************************************************/ + +static void __iomem *stli_bbygetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + void __iomem *ptr; + unsigned char val; + + BUG_ON(offset > brdp->memsize); + + ptr = brdp->membase + (offset % BBY_PAGESIZE); + val = (unsigned char) (offset / BBY_PAGESIZE); + outb(val, (brdp->iobase + BBY_ATCONFR)); + return(ptr); +} + +/*****************************************************************************/ + +static void stli_bbyreset(struct stlibrd *brdp) +{ + outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR)); + udelay(10); + outb(0, (brdp->iobase + BBY_ATCONFR)); + mdelay(1000); +} + +/*****************************************************************************/ + +/* + * The following routines act on original old Stallion boards. + */ + +static void stli_stalinit(struct stlibrd *brdp) +{ + outb(0x1, brdp->iobase); + mdelay(1000); +} + +/*****************************************************************************/ + +static void __iomem *stli_stalgetmemptr(struct stlibrd *brdp, unsigned long offset, int line) +{ + BUG_ON(offset > brdp->memsize); + return brdp->membase + (offset % STAL_PAGESIZE); +} + +/*****************************************************************************/ + +static void stli_stalreset(struct stlibrd *brdp) +{ + u32 __iomem *vecp; + + vecp = (u32 __iomem *) (brdp->membase + 0x30); + writel(0xffff0000, vecp); + outb(0, brdp->iobase); + mdelay(1000); +} + +/*****************************************************************************/ + +/* + * Try to find an ECP board and initialize it. This handles only ECP + * board types. + */ + +static int stli_initecp(struct stlibrd *brdp) +{ + cdkecpsig_t sig; + cdkecpsig_t __iomem *sigsp; + unsigned int status, nxtid; + char *name; + int retval, panelnr, nrports; + + if ((brdp->iobase == 0) || (brdp->memaddr == 0)) { + retval = -ENODEV; + goto err; + } + + brdp->iosize = ECP_IOSIZE; + + if (!request_region(brdp->iobase, brdp->iosize, "istallion")) { + retval = -EIO; + goto err; + } + +/* + * 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: + retval = -EINVAL; + goto err_reg; + } + +/* + * 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_nocache(brdp->memaddr, brdp->memsize); + if (brdp->membase == NULL) { + retval = -ENOMEM; + goto err_reg; + } + +/* + * 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); + sigsp = (cdkecpsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR); + memcpy_fromio(&sig, sigsp, sizeof(cdkecpsig_t)); + EBRDDISABLE(brdp); + + if (sig.magic != cpu_to_le32(ECP_MAGIC)) { + retval = -ENODEV; + goto err_unmap; + } + +/* + * 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; + return 0; +err_unmap: + iounmap(brdp->membase); + brdp->membase = NULL; +err_reg: + release_region(brdp->iobase, brdp->iosize); +err: + return retval; +} + +/*****************************************************************************/ + +/* + * Try to find an ONboard, Brumby or Stallion board and initialize it. + * This handles only these board types. + */ + +static int stli_initonb(struct stlibrd *brdp) +{ + cdkonbsig_t sig; + cdkonbsig_t __iomem *sigsp; + char *name; + int i, retval; + +/* + * Do a basic sanity check on the IO and memory addresses. + */ + if (brdp->iobase == 0 || brdp->memaddr == 0) { + retval = -ENODEV; + goto err; + } + + brdp->iosize = ONB_IOSIZE; + + if (!request_region(brdp->iobase, brdp->iosize, "istallion")) { + retval = -EIO; + goto err; + } + +/* + * 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: + retval = -EINVAL; + goto err_reg; + } + +/* + * 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_nocache(brdp->memaddr, brdp->memsize); + if (brdp->membase == NULL) { + retval = -ENOMEM; + goto err_reg; + } + +/* + * 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); + sigsp = (cdkonbsig_t __iomem *) EBRDGETMEMPTR(brdp, CDK_SIGADDR); + memcpy_fromio(&sig, sigsp, sizeof(cdkonbsig_t)); + EBRDDISABLE(brdp); + + if (sig.magic0 != cpu_to_le16(ONB_MAGIC0) || + sig.magic1 != cpu_to_le16(ONB_MAGIC1) || + sig.magic2 != cpu_to_le16(ONB_MAGIC2) || + sig.magic3 != cpu_to_le16(ONB_MAGIC3)) { + retval = -ENODEV; + goto err_unmap; + } + +/* + * 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; + return 0; +err_unmap: + iounmap(brdp->membase); + brdp->membase = NULL; +err_reg: + release_region(brdp->iobase, brdp->iosize); +err: + return retval; +} + +/*****************************************************************************/ + +/* + * Start up a running board. This routine is only called after the + * code has been down loaded to the board and is operational. It will + * read in the memory map, and get the show on the road... + */ + +static int stli_startbrd(struct stlibrd *brdp) +{ + cdkhdr_t __iomem *hdrp; + cdkmem_t __iomem *memp; + cdkasy_t __iomem *ap; + unsigned long flags; + unsigned int portnr, nrdevs, i; + struct stliport *portp; + int rc = 0; + u32 memoff; + + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + hdrp = (cdkhdr_t __iomem *) EBRDGETMEMPTR(brdp, CDK_CDKADDR); + nrdevs = hdrp->nrdevs; + +#if 0 + printk("%s(%d): CDK version %d.%d.%d --> " + "nrdevs=%d memp=%x hostp=%x slavep=%x\n", + __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)); +#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; + memoff = readl(&hdrp->memp); + if (memoff > brdp->memsize) { + printk(KERN_ERR "STALLION: corrupted shared memory region?\n"); + rc = -EIO; + goto stli_donestartup; + } + memp = (cdkmem_t __iomem *) EBRDGETMEMPTR(brdp, memoff); + if (readw(&memp->dtype) != TYP_ASYNCTRL) { + 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++) { + if (readw(&memp->dtype) != TYP_ASYNC) + break; + portp = brdp->ports[portnr]; + if (portp == NULL) + break; + portp->devnr = i; + portp->addr = readl(&memp->offset); + portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs)); + portp->portidx = (unsigned char) (i / 8); + portp->portbit = (unsigned char) (0x1 << (i % 8)); + } + + writeb(0xff, &hdrp->slavereq); + +/* + * 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]; + if (portp == NULL) + break; + if (portp->addr == 0) + break; + 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); + } + } + +stli_donestartup: + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, flags); + + if (rc == 0) + brdp->state |= BST_STARTED; + + if (! stli_timeron) { + stli_timeron++; + mod_timer(&stli_timerlist, STLI_TIMEOUT); + } + + return rc; +} + +/*****************************************************************************/ + +/* + * Probe and initialize the specified board. + */ + +static int __devinit stli_brdinit(struct stlibrd *brdp) +{ + int retval; + + switch (brdp->brdtype) { + case BRD_ECP: + case BRD_ECPE: + case BRD_ECPMC: + case BRD_ECPPCI: + retval = stli_initecp(brdp); + break; + case BRD_ONBOARD: + case BRD_ONBOARDE: + case BRD_ONBOARD2: + case BRD_BRUMBY4: + case BRD_STALLION: + retval = stli_initonb(brdp); + break; + default: + printk(KERN_ERR "STALLION: board=%d is unknown board " + "type=%d\n", brdp->brdnr, brdp->brdtype); + retval = -ENODEV; + } + + if (retval) + return retval; + + 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); + return 0; +} + +#if STLI_EISAPROBE != 0 +/*****************************************************************************/ + +/* + * Probe around trying to find where the EISA boards shared memory + * might be. This is a bit if hack, but it is the best we can do. + */ + +static int stli_eisamemprobe(struct stlibrd *brdp) +{ + cdkecpsig_t ecpsig, __iomem *ecpsigp; + cdkonbsig_t onbsig, __iomem *onbsigp; + 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 { + return -ENODEV; + } + + 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_nocache(brdp->memaddr, brdp->memsize); + if (brdp->membase == NULL) + continue; + + if (brdp->brdtype == BRD_ECPE) { + ecpsigp = stli_ecpeigetmemptr(brdp, + CDK_SIGADDR, __LINE__); + memcpy_fromio(&ecpsig, ecpsigp, sizeof(cdkecpsig_t)); + if (ecpsig.magic == cpu_to_le32(ECP_MAGIC)) + foundit = 1; + } else { + onbsigp = (cdkonbsig_t __iomem *) stli_onbegetmemptr(brdp, + CDK_SIGADDR, __LINE__); + 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))) + 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)); + return -ENODEV; + } + return 0; +} +#endif + +static int stli_getbrdnr(void) +{ + unsigned int i; + + for (i = 0; i < STL_MAXBRDS; i++) { + if (!stli_brds[i]) { + if (i >= stli_nrbrds) + stli_nrbrds = i + 1; + return i; + } + } + return -1; +} + +#if STLI_EISAPROBE != 0 +/*****************************************************************************/ + +/* + * 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 __init stli_findeisabrds(void) +{ + struct stlibrd *brdp; + unsigned int iobase, eid, i; + int brdnr, found = 0; + +/* + * Firstly check if this is an EISA system. If this is not an EISA system then + * don't bother going any further! + */ + if (EISA_bus) + return 0; + +/* + * 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]; + if (brdp == NULL) + 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. + */ + if ((brdp = stli_allocbrd()) == NULL) + return found ? : -ENOMEM; + brdnr = stli_getbrdnr(); + if (brdnr < 0) + return found ? : -ENOMEM; + brdp->brdnr = (unsigned int)brdnr; + 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)); + if (stli_brdinit(brdp) < 0) { + kfree(brdp); + continue; + } + + stli_brds[brdp->brdnr] = brdp; + found++; + + for (i = 0; i < brdp->nrports; i++) + tty_register_device(stli_serial, + brdp->brdnr * STL_MAXPORTS + i, NULL); + } + + return found; +} +#else +static inline int stli_findeisabrds(void) { return 0; } +#endif + +/*****************************************************************************/ + +/* + * 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. + */ + +static int __devinit stli_pciprobe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + struct stlibrd *brdp; + unsigned int i; + int brdnr, retval = -EIO; + + retval = pci_enable_device(pdev); + if (retval) + goto err; + brdp = stli_allocbrd(); + if (brdp == NULL) { + retval = -ENOMEM; + goto err; + } + mutex_lock(&stli_brdslock); + brdnr = stli_getbrdnr(); + if (brdnr < 0) { + printk(KERN_INFO "STALLION: too many boards found, " + "maximum supported %d\n", STL_MAXBRDS); + mutex_unlock(&stli_brdslock); + retval = -EIO; + goto err_fr; + } + brdp->brdnr = (unsigned int)brdnr; + stli_brds[brdp->brdnr] = brdp; + mutex_unlock(&stli_brdslock); + brdp->brdtype = BRD_ECPPCI; +/* + * We have all resources from the board, so lets setup the actual + * board structure now. + */ + brdp->iobase = pci_resource_start(pdev, 3); + brdp->memaddr = pci_resource_start(pdev, 2); + retval = stli_brdinit(brdp); + if (retval) + goto err_null; + + brdp->state |= BST_PROBED; + pci_set_drvdata(pdev, brdp); + + EBRDENABLE(brdp); + brdp->enable = NULL; + brdp->disable = NULL; + + for (i = 0; i < brdp->nrports; i++) + tty_register_device(stli_serial, brdp->brdnr * STL_MAXPORTS + i, + &pdev->dev); + + return 0; +err_null: + stli_brds[brdp->brdnr] = NULL; +err_fr: + kfree(brdp); +err: + return retval; +} + +static void stli_pciremove(struct pci_dev *pdev) +{ + struct stlibrd *brdp = pci_get_drvdata(pdev); + + stli_cleanup_ports(brdp); + + iounmap(brdp->membase); + if (brdp->iosize > 0) + release_region(brdp->iobase, brdp->iosize); + + stli_brds[brdp->brdnr] = NULL; + kfree(brdp); +} + +static struct pci_driver stli_pcidriver = { + .name = "istallion", + .id_table = istallion_pci_tbl, + .probe = stli_pciprobe, + .remove = __devexit_p(stli_pciremove) +}; +/*****************************************************************************/ + +/* + * Allocate a new board structure. Fill out the basic info in it. + */ + +static struct stlibrd *stli_allocbrd(void) +{ + struct stlibrd *brdp; + + brdp = kzalloc(sizeof(struct stlibrd), GFP_KERNEL); + if (!brdp) { + printk(KERN_ERR "STALLION: failed to allocate memory " + "(size=%Zd)\n", sizeof(struct stlibrd)); + return NULL; + } + brdp->magic = STLI_BOARDMAGIC; + return brdp; +} + +/*****************************************************************************/ + +/* + * Scan through all the boards in the configuration and see what we + * can find. + */ + +static int __init stli_initbrds(void) +{ + struct stlibrd *brdp, *nxtbrdp; + struct stlconf conf; + unsigned int i, j, found = 0; + int retval; + + 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; + if ((brdp = stli_allocbrd()) == NULL) + continue; + brdp->brdnr = stli_nrbrds; + brdp->brdtype = conf.brdtype; + brdp->iobase = conf.ioaddr1; + brdp->memaddr = conf.memaddr; + if (stli_brdinit(brdp) < 0) { + kfree(brdp); + continue; + } + stli_brds[brdp->brdnr] = brdp; + found++; + + for (i = 0; i < brdp->nrports; i++) + tty_register_device(stli_serial, + brdp->brdnr * STL_MAXPORTS + i, NULL); + } + + retval = stli_findeisabrds(); + if (retval > 0) + found += retval; + +/* + * 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]; + if (brdp == NULL) + continue; + for (j = i + 1; (j < stli_nrbrds); j++) { + nxtbrdp = stli_brds[j]; + if (nxtbrdp == NULL) + 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]; + if (brdp == NULL) + continue; + if (brdp->state & BST_FOUND) { + EBRDENABLE(brdp); + brdp->enable = NULL; + brdp->disable = NULL; + } + } + } + + 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; + } + + return 0; +err: + return retval; +} + +/*****************************************************************************/ + +/* + * 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) +{ + unsigned long flags; + void __iomem *memptr; + struct stlibrd *brdp; + unsigned int brdnr; + int size, n; + void *p; + loff_t off = *offp; + + brdnr = iminor(fp->f_path.dentry->d_inode); + if (brdnr >= stli_nrbrds) + return -ENODEV; + brdp = stli_brds[brdnr]; + if (brdp == NULL) + return -ENODEV; + if (brdp->state == 0) + return -ENODEV; + if (off >= brdp->memsize || off + count < off) + return 0; + + size = min(count, (size_t)(brdp->memsize - off)); + + /* + * Copy the data a page at a time + */ + + p = (void *)__get_free_page(GFP_KERNEL); + if(p == NULL) + return -ENOMEM; + + while (size > 0) { + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + memptr = EBRDGETMEMPTR(brdp, off); + n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize))); + n = min(n, (int)PAGE_SIZE); + memcpy_fromio(p, memptr, n); + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, flags); + if (copy_to_user(buf, p, n)) { + count = -EFAULT; + goto out; + } + off += n; + buf += n; + size -= n; + } +out: + *offp = off; + free_page((unsigned long)p); + return count; +} + +/*****************************************************************************/ + +/* + * 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 :-) + * + * FIXME: copy under lock + */ + +static ssize_t stli_memwrite(struct file *fp, const char __user *buf, size_t count, loff_t *offp) +{ + unsigned long flags; + void __iomem *memptr; + struct stlibrd *brdp; + char __user *chbuf; + unsigned int brdnr; + int size, n; + void *p; + loff_t off = *offp; + + brdnr = iminor(fp->f_path.dentry->d_inode); + + if (brdnr >= stli_nrbrds) + return -ENODEV; + brdp = stli_brds[brdnr]; + if (brdp == NULL) + return -ENODEV; + if (brdp->state == 0) + return -ENODEV; + if (off >= brdp->memsize || off + count < off) + return 0; + + chbuf = (char __user *) buf; + size = min(count, (size_t)(brdp->memsize - off)); + + /* + * Copy the data a page at a time + */ + + p = (void *)__get_free_page(GFP_KERNEL); + if(p == NULL) + return -ENOMEM; + + while (size > 0) { + n = min(size, (int)(brdp->pagesize - (((unsigned long) off) % brdp->pagesize))); + n = min(n, (int)PAGE_SIZE); + if (copy_from_user(p, chbuf, n)) { + if (count == 0) + count = -EFAULT; + goto out; + } + spin_lock_irqsave(&brd_lock, flags); + EBRDENABLE(brdp); + memptr = EBRDGETMEMPTR(brdp, off); + memcpy_toio(memptr, p, n); + EBRDDISABLE(brdp); + spin_unlock_irqrestore(&brd_lock, flags); + off += n; + chbuf += n; + size -= n; + } +out: + free_page((unsigned long) p); + *offp = off; + return count; +} + +/*****************************************************************************/ + +/* + * Return the board stats structure to user app. + */ + +static int stli_getbrdstats(combrd_t __user *bp) +{ + struct stlibrd *brdp; + unsigned int i; + + if (copy_from_user(&stli_brdstats, bp, sizeof(combrd_t))) + return -EFAULT; + if (stli_brdstats.brd >= STL_MAXBRDS) + return -ENODEV; + brdp = stli_brds[stli_brdstats.brd]; + if (brdp == NULL) + return -ENODEV; + + 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; + return 0; +} + +/*****************************************************************************/ + +/* + * Resolve the referenced port number into a port struct pointer. + */ + +static struct stliport *stli_getport(unsigned int brdnr, unsigned int panelnr, + unsigned int portnr) +{ + struct stlibrd *brdp; + unsigned int i; + + if (brdnr >= STL_MAXBRDS) + return NULL; + brdp = stli_brds[brdnr]; + if (brdp == NULL) + return NULL; + for (i = 0; (i < panelnr); i++) + portnr += brdp->panels[i]; + if (portnr >= brdp->nrports) + return NULL; + return brdp->ports[portnr]; +} + +/*****************************************************************************/ + +/* + * Return the port stats structure to user app. A NULL port struct + * pointer passed in means that we need to find out from the app + * what port to get stats for (used through board control device). + */ + +static int stli_portcmdstats(struct tty_struct *tty, struct stliport *portp) +{ + unsigned long flags; + struct stlibrd *brdp; + int rc; + + memset(&stli_comstats, 0, sizeof(comstats_t)); + + if (portp == NULL) + return -ENODEV; + brdp = stli_brds[portp->brdnr]; + if (brdp == NULL) + return -ENODEV; + + if (brdp->state & BST_STARTED) { + if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS, + &stli_cdkstats, sizeof(asystats_t), 1)) < 0) + return rc; + } 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->port.flags; + + spin_lock_irqsave(&brd_lock, flags); + if (tty != NULL) { + if (portp->port.tty == tty) { + stli_comstats.ttystate = tty->flags; + stli_comstats.rxbuffered = -1; + if (tty->termios != NULL) { + stli_comstats.cflags = tty->termios->c_cflag; + stli_comstats.iflags = tty->termios->c_iflag; + stli_comstats.oflags = tty->termios->c_oflag; + stli_comstats.lflags = tty->termios->c_lflag; + } + } + } + spin_unlock_irqrestore(&brd_lock, flags); + + 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); + + return 0; +} + +/*****************************************************************************/ + +/* + * Return the port stats structure to user app. A NULL port struct + * pointer passed in means that we need to find out from the app + * what port to get stats for (used through board control device). + */ + +static int stli_getportstats(struct tty_struct *tty, struct stliport *portp, + comstats_t __user *cp) +{ + struct stlibrd *brdp; + int rc; + + 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(tty, portp)) < 0) + return rc; + + return copy_to_user(cp, &stli_comstats, sizeof(comstats_t)) ? + -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Clear the port stats structure. We also return it zeroed out... + */ + +static int stli_clrportstats(struct stliport *portp, comstats_t __user *cp) +{ + struct stlibrd *brdp; + int rc; + + if (!portp) { + if (copy_from_user(&stli_comstats, cp, sizeof(comstats_t))) + return -EFAULT; + portp = stli_getport(stli_comstats.brd, stli_comstats.panel, + stli_comstats.port); + if (!portp) + return -ENODEV; + } + + brdp = stli_brds[portp->brdnr]; + if (!brdp) + return -ENODEV; + + if (brdp->state & BST_STARTED) { + if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, NULL, 0, 0)) < 0) + return rc; + } + + memset(&stli_comstats, 0, sizeof(comstats_t)); + stli_comstats.brd = portp->brdnr; + stli_comstats.panel = portp->panelnr; + stli_comstats.port = portp->portnr; + + if (copy_to_user(cp, &stli_comstats, sizeof(comstats_t))) + return -EFAULT; + return 0; +} + +/*****************************************************************************/ + +/* + * Return the entire driver ports structure to a user app. + */ + +static int stli_getportstruct(struct stliport __user *arg) +{ + struct stliport stli_dummyport; + struct stliport *portp; + + if (copy_from_user(&stli_dummyport, arg, sizeof(struct stliport))) + return -EFAULT; + portp = stli_getport(stli_dummyport.brdnr, stli_dummyport.panelnr, + stli_dummyport.portnr); + if (!portp) + return -ENODEV; + if (copy_to_user(arg, portp, sizeof(struct stliport))) + return -EFAULT; + return 0; +} + +/*****************************************************************************/ + +/* + * Return the entire driver board structure to a user app. + */ + +static int stli_getbrdstruct(struct stlibrd __user *arg) +{ + struct stlibrd stli_dummybrd; + struct stlibrd *brdp; + + if (copy_from_user(&stli_dummybrd, arg, sizeof(struct stlibrd))) + return -EFAULT; + if (stli_dummybrd.brdnr >= STL_MAXBRDS) + return -ENODEV; + brdp = stli_brds[stli_dummybrd.brdnr]; + if (!brdp) + return -ENODEV; + if (copy_to_user(arg, brdp, sizeof(struct stlibrd))) + 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) +{ + struct stlibrd *brdp; + int brdnr, rc, done; + void __user *argp = (void __user *)arg; + +/* + * First up handle the board independent ioctls. + */ + done = 0; + rc = 0; + + lock_kernel(); + + switch (cmd) { + case COM_GETPORTSTATS: + rc = stli_getportstats(NULL, 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; + } + unlock_kernel(); + + if (done) + return rc; + +/* + * 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) + return -ENODEV; + brdp = stli_brds[brdnr]; + if (!brdp) + return -ENODEV; + if (brdp->state == 0) + return -ENODEV; + + lock_kernel(); + + 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; + } + unlock_kernel(); + return rc; +} + +static const struct tty_operations stli_ops = { + .open = stli_open, + .close = stli_close, + .write = stli_write, + .put_char = stli_putchar, + .flush_chars = stli_flushchars, + .write_room = stli_writeroom, + .chars_in_buffer = stli_charsinbuffer, + .ioctl = stli_ioctl, + .set_termios = stli_settermios, + .throttle = stli_throttle, + .unthrottle = stli_unthrottle, + .stop = stli_stop, + .start = stli_start, + .hangup = stli_hangup, + .flush_buffer = stli_flushbuffer, + .break_ctl = stli_breakctl, + .wait_until_sent = stli_waituntilsent, + .send_xchar = stli_sendxchar, + .read_proc = stli_readproc, + .tiocmget = stli_tiocmget, + .tiocmset = stli_tiocmset, +}; + +/*****************************************************************************/ +/* + * Loadable module initialization stuff. + */ + +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; + } +} + +static int __init istallion_module_init(void) +{ + unsigned int i; + int retval; + + printk(KERN_INFO "%s: version %s\n", stli_drvtitle, stli_drvversion); + + spin_lock_init(&stli_lock); + spin_lock_init(&brd_lock); + + stli_txcookbuf = kmalloc(STLI_TXBUFSIZE, GFP_KERNEL); + if (!stli_txcookbuf) { + printk(KERN_ERR "STALLION: failed to allocate memory " + "(size=%d)\n", STLI_TXBUFSIZE); + retval = -ENOMEM; + goto err; + } + + stli_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); + if (!stli_serial) { + retval = -ENOMEM; + goto err_free; + } + + stli_serial->owner = THIS_MODULE; + stli_serial->driver_name = stli_drvname; + stli_serial->name = stli_serialname; + stli_serial->major = STL_SERIALMAJOR; + stli_serial->minor_start = 0; + stli_serial->type = TTY_DRIVER_TYPE_SERIAL; + stli_serial->subtype = SERIAL_TYPE_NORMAL; + stli_serial->init_termios = stli_deftermios; + stli_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + tty_set_operations(stli_serial, &stli_ops); + + retval = tty_register_driver(stli_serial); + if (retval) { + printk(KERN_ERR "STALLION: failed to register serial driver\n"); + 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; + } + + istallion_class = class_create(THIS_MODULE, "staliomem"); + for (i = 0; i < 4; i++) + device_create(istallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i), + NULL, "staliomem%d", i); + + return 0; +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; +} + +/*****************************************************************************/ + +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); + } + + unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"); + + for (j = 0; j < 4; j++) + device_destroy(istallion_class, MKDEV(STL_SIOMEMMAJOR, j)); + class_destroy(istallion_class); + + pci_unregister_driver(&stli_pcidriver); + istallion_cleanup_isa(); + + tty_unregister_driver(stli_serial); + put_tty_driver(stli_serial); + + kfree(stli_txcookbuf); +} + +module_init(istallion_module_init); +module_exit(istallion_module_exit); |
