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Diffstat (limited to 'drivers/char/stallion.c')
| -rw-r--r-- | drivers/char/stallion.c | 5197 |
1 files changed, 5197 insertions, 0 deletions
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c new file mode 100644 index 00000000000..de166608c59 --- /dev/null +++ b/drivers/char/stallion.c @@ -0,0 +1,5197 @@ +/*****************************************************************************/ + +/* + * stallion.c -- stallion multiport serial driver. + * + * Copyright (C) 1996-1999 Stallion Technologies + * Copyright (C) 1994-1996 Greg Ungerer. + * + * This code is loosely based on the Linux serial driver, written by + * Linus Torvalds, Theodore T'so and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/*****************************************************************************/ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial.h> +#include <linux/cd1400.h> +#include <linux/sc26198.h> +#include <linux/comstats.h> +#include <linux/stallion.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/smp_lock.h> +#include <linux/devfs_fs_kernel.h> +#include <linux/device.h> +#include <linux/delay.h> + +#include <asm/io.h> +#include <asm/uaccess.h> + +#ifdef CONFIG_PCI +#include <linux/pci.h> +#endif + +/*****************************************************************************/ + +/* + * Define different board types. Use the standard Stallion "assigned" + * board numbers. Boards supported in this driver are abbreviated as + * EIO = EasyIO and ECH = EasyConnection 8/32. + */ +#define BRD_EASYIO 20 +#define BRD_ECH 21 +#define BRD_ECHMC 22 +#define BRD_ECHPCI 26 +#define BRD_ECH64PCI 27 +#define BRD_EASYIOPCI 28 + +/* + * 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 + * stl_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_EASYIO, 0x2a0, 0, 0, 10, 0 }, + * This line would configure an EasyIO board (4 or 8, no difference), + * at io address 2a0 and irq 10. + * Another example: + * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, + * This line will configure an EasyConnection 8/32 board at primary io + * address 2a8, secondary io address 280 and irq 12. + * Enter as many lines into this array as you want (only the first 4 + * will actually be used!). Any combination of EasyIO and EasyConnection + * boards can be specified. EasyConnection 8/32 boards can share their + * secondary io addresses between each other. + * + * NOTE: there is no need to put any entries in this table for PCI + * boards. They will be found automatically by the driver - provided + * PCI BIOS32 support is compiled into the kernel. + */ + +typedef struct { + int brdtype; + int ioaddr1; + int ioaddr2; + unsigned long memaddr; + int irq; + int irqtype; +} stlconf_t; + +static stlconf_t stl_brdconf[] = { + /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ +}; + +static int stl_nrbrds = sizeof(stl_brdconf) / sizeof(stlconf_t); + +/*****************************************************************************/ + +/* + * 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 + +/* + * Set the TX buffer size. Bigger is better, but we don't want + * to chew too much memory with buffers! + */ +#define STL_TXBUFLOW 512 +#define STL_TXBUFSIZE 4096 + +/*****************************************************************************/ + +/* + * Define our local driver identity first. Set up stuff to deal with + * all the local structures required by a serial tty driver. + */ +static char *stl_drvtitle = "Stallion Multiport Serial Driver"; +static char *stl_drvname = "stallion"; +static char *stl_drvversion = "5.6.0"; + +static struct tty_driver *stl_serial; + +/* + * We will need to allocate a temporary write buffer for chars that + * come direct from user space. The problem is that a copy from user + * space might cause a page fault (typically on a system that is + * swapping!). All ports will share one buffer - since if the system + * is already swapping a shared buffer won't make things any worse. + */ +static char *stl_tmpwritebuf; +static DECLARE_MUTEX(stl_tmpwritesem); + +/* + * 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, 8 data bits, 1 stop bit. + */ +static struct termios stl_deftermios = { + .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), + .c_cc = INIT_C_CC, +}; + +/* + * Define global stats structures. Not used often, and can be + * re-used for each stats call. + */ +static comstats_t stl_comstats; +static combrd_t stl_brdstats; +static stlbrd_t stl_dummybrd; +static stlport_t stl_dummyport; + +/* + * Define global place to put buffer overflow characters. + */ +static char stl_unwanted[SC26198_RXFIFOSIZE]; + +/*****************************************************************************/ + +static stlbrd_t *stl_brds[STL_MAXBRDS]; + +/* + * Per board state flags. Used with the state field of the board struct. + * Not really much here! + */ +#define BRD_FOUND 0x1 + +/* + * Define the port structure istate flags. These set of flags are + * modified at interrupt time - so setting and reseting them needs + * to be atomic. Use the bit clear/setting routines for this. + */ +#define ASYI_TXBUSY 1 +#define ASYI_TXLOW 2 +#define ASYI_DCDCHANGE 3 +#define ASYI_TXFLOWED 4 + +/* + * Define an array of board names as printable strings. Handy for + * referencing boards when printing trace and stuff. + */ +static char *stl_brdnames[] = { + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + (char *) NULL, + "EasyIO", + "EC8/32-AT", + "EC8/32-MC", + (char *) NULL, + (char *) NULL, + (char *) NULL, + "EC8/32-PCI", + "EC8/64-PCI", + "EasyIO-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 int stl_nargs = 0; +static char *board0[4]; +static char *board1[4]; +static char *board2[4]; +static char *board3[4]; + +static char **stl_brdsp[] = { + (char **) &board0, + (char **) &board1, + (char **) &board2, + (char **) &board3 +}; + +/* + * Define a set of common board names, and types. This is used to + * parse any module arguments. + */ + +typedef struct stlbrdtype { + char *name; + int type; +} stlbrdtype_t; + +static stlbrdtype_t stl_brdstr[] = { + { "easyio", BRD_EASYIO }, + { "eio", BRD_EASYIO }, + { "20", BRD_EASYIO }, + { "ec8/32", BRD_ECH }, + { "ec8/32-at", BRD_ECH }, + { "ec8/32-isa", BRD_ECH }, + { "ech", BRD_ECH }, + { "echat", BRD_ECH }, + { "21", BRD_ECH }, + { "ec8/32-mc", BRD_ECHMC }, + { "ec8/32-mca", BRD_ECHMC }, + { "echmc", BRD_ECHMC }, + { "echmca", BRD_ECHMC }, + { "22", BRD_ECHMC }, + { "ec8/32-pc", BRD_ECHPCI }, + { "ec8/32-pci", BRD_ECHPCI }, + { "26", BRD_ECHPCI }, + { "ec8/64-pc", BRD_ECH64PCI }, + { "ec8/64-pci", BRD_ECH64PCI }, + { "ech-pci", BRD_ECH64PCI }, + { "echpci", BRD_ECH64PCI }, + { "echpc", BRD_ECH64PCI }, + { "27", BRD_ECH64PCI }, + { "easyio-pc", BRD_EASYIOPCI }, + { "easyio-pci", BRD_EASYIOPCI }, + { "eio-pci", BRD_EASYIOPCI }, + { "eiopci", BRD_EASYIOPCI }, + { "28", BRD_EASYIOPCI }, +}; + +/* + * Define the module agruments. + */ +MODULE_AUTHOR("Greg Ungerer"); +MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); +MODULE_LICENSE("GPL"); + +module_param_array(board0, charp, &stl_nargs, 0); +MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); +module_param_array(board1, charp, &stl_nargs, 0); +MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); +module_param_array(board2, charp, &stl_nargs, 0); +MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); +module_param_array(board3, charp, &stl_nargs, 0); +MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); + +/*****************************************************************************/ + +/* + * Hardware ID bits for the EasyIO and ECH boards. These defines apply + * to the directly accessible io ports of these boards (not the uarts - + * they are in cd1400.h and sc26198.h). + */ +#define EIO_8PORTRS 0x04 +#define EIO_4PORTRS 0x05 +#define EIO_8PORTDI 0x00 +#define EIO_8PORTM 0x06 +#define EIO_MK3 0x03 +#define EIO_IDBITMASK 0x07 + +#define EIO_BRDMASK 0xf0 +#define ID_BRD4 0x10 +#define ID_BRD8 0x20 +#define ID_BRD16 0x30 + +#define EIO_INTRPEND 0x08 +#define EIO_INTEDGE 0x00 +#define EIO_INTLEVEL 0x08 +#define EIO_0WS 0x10 + +#define ECH_ID 0xa0 +#define ECH_IDBITMASK 0xe0 +#define ECH_BRDENABLE 0x08 +#define ECH_BRDDISABLE 0x00 +#define ECH_INTENABLE 0x01 +#define ECH_INTDISABLE 0x00 +#define ECH_INTLEVEL 0x02 +#define ECH_INTEDGE 0x00 +#define ECH_INTRPEND 0x01 +#define ECH_BRDRESET 0x01 + +#define ECHMC_INTENABLE 0x01 +#define ECHMC_BRDRESET 0x02 + +#define ECH_PNLSTATUS 2 +#define ECH_PNL16PORT 0x20 +#define ECH_PNLIDMASK 0x07 +#define ECH_PNLXPID 0x40 +#define ECH_PNLINTRPEND 0x80 + +#define ECH_ADDR2MASK 0x1e0 + +/* + * Define the vector mapping bits for the programmable interrupt board + * hardware. These bits encode the interrupt for the board to use - it + * is software selectable (except the EIO-8M). + */ +static unsigned char stl_vecmap[] = { + 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, + 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 +}; + +/* + * Set up enable and disable macros for the ECH boards. They require + * the secondary io address space to be activated and deactivated. + * This way all ECH boards can share their secondary io region. + * If this is an ECH-PCI board then also need to set the page pointer + * to point to the correct page. + */ +#define BRDENABLE(brdnr,pagenr) \ + if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ + outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ + stl_brds[(brdnr)]->ioctrl); \ + else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ + outb((pagenr), stl_brds[(brdnr)]->ioctrl); + +#define BRDDISABLE(brdnr) \ + if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ + outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ + stl_brds[(brdnr)]->ioctrl); + +#define STL_CD1400MAXBAUD 230400 +#define STL_SC26198MAXBAUD 460800 + +#define STL_BAUDBASE 115200 +#define STL_CLOSEDELAY (5 * HZ / 10) + +/*****************************************************************************/ + +#ifdef CONFIG_PCI + +/* + * Define the Stallion PCI vendor and device IDs. + */ +#ifndef PCI_VENDOR_ID_STALLION +#define PCI_VENDOR_ID_STALLION 0x124d +#endif +#ifndef PCI_DEVICE_ID_ECHPCI832 +#define PCI_DEVICE_ID_ECHPCI832 0x0000 +#endif +#ifndef PCI_DEVICE_ID_ECHPCI864 +#define PCI_DEVICE_ID_ECHPCI864 0x0002 +#endif +#ifndef PCI_DEVICE_ID_EIOPCI +#define PCI_DEVICE_ID_EIOPCI 0x0003 +#endif + +/* + * Define structure to hold all Stallion PCI boards. + */ +typedef struct stlpcibrd { + unsigned short vendid; + unsigned short devid; + int brdtype; +} stlpcibrd_t; + +static stlpcibrd_t stl_pcibrds[] = { + { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, + { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, + { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, + { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, +}; + +static int stl_nrpcibrds = sizeof(stl_pcibrds) / sizeof(stlpcibrd_t); + +#endif + +/*****************************************************************************/ + +/* + * Define macros to extract a brd/port number from a minor number. + */ +#define MINOR2BRD(min) (((min) & 0xc0) >> 6) +#define MINOR2PORT(min) ((min) & 0x3f) + +/* + * Define a baud rate table that converts termios baud rate selector + * into the actual baud rate value. All baud rate calculations are + * based on the actual baud rate required. + */ +static unsigned int stl_baudrates[] = { + 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, + 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 +}; + +/* + * Define some handy local macros... + */ +#undef MIN +#define MIN(a,b) (((a) <= (b)) ? (a) : (b)) + +#undef TOLOWER +#define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) + +/*****************************************************************************/ + +/* + * Declare all those functions in this driver! + */ + +static void stl_argbrds(void); +static int stl_parsebrd(stlconf_t *confp, char **argp); + +static unsigned long stl_atol(char *str); + +int stl_init(void); +static int stl_open(struct tty_struct *tty, struct file *filp); +static void stl_close(struct tty_struct *tty, struct file *filp); +static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count); +static void stl_putchar(struct tty_struct *tty, unsigned char ch); +static void stl_flushchars(struct tty_struct *tty); +static int stl_writeroom(struct tty_struct *tty); +static int stl_charsinbuffer(struct tty_struct *tty); +static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); +static void stl_settermios(struct tty_struct *tty, struct termios *old); +static void stl_throttle(struct tty_struct *tty); +static void stl_unthrottle(struct tty_struct *tty); +static void stl_stop(struct tty_struct *tty); +static void stl_start(struct tty_struct *tty); +static void stl_flushbuffer(struct tty_struct *tty); +static void stl_breakctl(struct tty_struct *tty, int state); +static void stl_waituntilsent(struct tty_struct *tty, int timeout); +static void stl_sendxchar(struct tty_struct *tty, char ch); +static void stl_hangup(struct tty_struct *tty); +static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); +static int stl_portinfo(stlport_t *portp, int portnr, char *pos); +static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data); + +static int stl_brdinit(stlbrd_t *brdp); +static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); +static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp); +static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp); +static int stl_getbrdstats(combrd_t __user *bp); +static int stl_getportstats(stlport_t *portp, comstats_t __user *cp); +static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp); +static int stl_getportstruct(stlport_t __user *arg); +static int stl_getbrdstruct(stlbrd_t __user *arg); +static int stl_waitcarrier(stlport_t *portp, struct file *filp); +static int stl_eiointr(stlbrd_t *brdp); +static int stl_echatintr(stlbrd_t *brdp); +static int stl_echmcaintr(stlbrd_t *brdp); +static int stl_echpciintr(stlbrd_t *brdp); +static int stl_echpci64intr(stlbrd_t *brdp); +static void stl_offintr(void *private); +static void *stl_memalloc(int len); +static stlbrd_t *stl_allocbrd(void); +static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); + +static inline int stl_initbrds(void); +static inline int stl_initeio(stlbrd_t *brdp); +static inline int stl_initech(stlbrd_t *brdp); +static inline int stl_getbrdnr(void); + +#ifdef CONFIG_PCI +static inline int stl_findpcibrds(void); +static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp); +#endif + +/* + * CD1400 uart specific handling functions. + */ +static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); +static int stl_cd1400getreg(stlport_t *portp, int regnr); +static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); +static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); +static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); +static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); +static int stl_cd1400getsignals(stlport_t *portp); +static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); +static void stl_cd1400ccrwait(stlport_t *portp); +static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); +static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); +static void stl_cd1400disableintrs(stlport_t *portp); +static void stl_cd1400sendbreak(stlport_t *portp, int len); +static void stl_cd1400flowctrl(stlport_t *portp, int state); +static void stl_cd1400sendflow(stlport_t *portp, int state); +static void stl_cd1400flush(stlport_t *portp); +static int stl_cd1400datastate(stlport_t *portp); +static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); +static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); +static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); +static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); +static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); + +static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr); + +/* + * SC26198 uart specific handling functions. + */ +static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); +static int stl_sc26198getreg(stlport_t *portp, int regnr); +static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); +static int stl_sc26198getglobreg(stlport_t *portp, int regnr); +static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); +static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); +static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); +static int stl_sc26198getsignals(stlport_t *portp); +static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); +static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); +static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); +static void stl_sc26198disableintrs(stlport_t *portp); +static void stl_sc26198sendbreak(stlport_t *portp, int len); +static void stl_sc26198flowctrl(stlport_t *portp, int state); +static void stl_sc26198sendflow(stlport_t *portp, int state); +static void stl_sc26198flush(stlport_t *portp); +static int stl_sc26198datastate(stlport_t *portp); +static void stl_sc26198wait(stlport_t *portp); +static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); +static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); +static void stl_sc26198txisr(stlport_t *port); +static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); +static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); +static void stl_sc26198rxbadchars(stlport_t *portp); +static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); + +/*****************************************************************************/ + +/* + * Generic UART support structure. + */ +typedef struct uart { + int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); + void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); + void (*setport)(stlport_t *portp, struct termios *tiosp); + int (*getsignals)(stlport_t *portp); + void (*setsignals)(stlport_t *portp, int dtr, int rts); + void (*enablerxtx)(stlport_t *portp, int rx, int tx); + void (*startrxtx)(stlport_t *portp, int rx, int tx); + void (*disableintrs)(stlport_t *portp); + void (*sendbreak)(stlport_t *portp, int len); + void (*flowctrl)(stlport_t *portp, int state); + void (*sendflow)(stlport_t *portp, int state); + void (*flush)(stlport_t *portp); + int (*datastate)(stlport_t *portp); + void (*intr)(stlpanel_t *panelp, unsigned int iobase); +} uart_t; + +/* + * Define some macros to make calling these functions nice and clean. + */ +#define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) +#define stl_portinit (* ((uart_t *) portp->uartp)->portinit) +#define stl_setport (* ((uart_t *) portp->uartp)->setport) +#define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) +#define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) +#define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) +#define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) +#define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) +#define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) +#define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) +#define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) +#define stl_flush (* ((uart_t *) portp->uartp)->flush) +#define stl_datastate (* ((uart_t *) portp->uartp)->datastate) + +/*****************************************************************************/ + +/* + * CD1400 UART specific data initialization. + */ +static uart_t stl_cd1400uart = { + stl_cd1400panelinit, + stl_cd1400portinit, + stl_cd1400setport, + stl_cd1400getsignals, + stl_cd1400setsignals, + stl_cd1400enablerxtx, + stl_cd1400startrxtx, + stl_cd1400disableintrs, + stl_cd1400sendbreak, + stl_cd1400flowctrl, + stl_cd1400sendflow, + stl_cd1400flush, + stl_cd1400datastate, + stl_cd1400eiointr +}; + +/* + * Define the offsets within the register bank of a cd1400 based panel. + * These io address offsets are common to the EasyIO board as well. + */ +#define EREG_ADDR 0 +#define EREG_DATA 4 +#define EREG_RXACK 5 +#define EREG_TXACK 6 +#define EREG_MDACK 7 + +#define EREG_BANKSIZE 8 + +#define CD1400_CLK 25000000 +#define CD1400_CLK8M 20000000 + +/* + * Define the cd1400 baud rate clocks. These are used when calculating + * what clock and divisor to use for the required baud rate. Also + * define the maximum baud rate allowed, and the default base baud. + */ +static int stl_cd1400clkdivs[] = { + CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 +}; + +/*****************************************************************************/ + +/* + * SC26198 UART specific data initization. + */ +static uart_t stl_sc26198uart = { + stl_sc26198panelinit, + stl_sc26198portinit, + stl_sc26198setport, + stl_sc26198getsignals, + stl_sc26198setsignals, + stl_sc26198enablerxtx, + stl_sc26198startrxtx, + stl_sc26198disableintrs, + stl_sc26198sendbreak, + stl_sc26198flowctrl, + stl_sc26198sendflow, + stl_sc26198flush, + stl_sc26198datastate, + stl_sc26198intr +}; + +/* + * Define the offsets within the register bank of a sc26198 based panel. + */ +#define XP_DATA 0 +#define XP_ADDR 1 +#define XP_MODID 2 +#define XP_STATUS 2 +#define XP_IACK 3 + +#define XP_BANKSIZE 4 + +/* + * Define the sc26198 baud rate table. Offsets within the table + * represent the actual baud rate selector of sc26198 registers. + */ +static unsigned int sc26198_baudtable[] = { + 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, + 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, + 230400, 460800, 921600 +}; + +#define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int)) + +/*****************************************************************************/ + +/* + * Define the driver info for a user level control device. Used mainly + * to get at port stats - only not using the port device itself. + */ +static struct file_operations stl_fsiomem = { + .owner = THIS_MODULE, + .ioctl = stl_memioctl, +}; + +/*****************************************************************************/ + +static struct class_simple *stallion_class; + +/* + * Loadable module initialization stuff. + */ + +static int __init stallion_module_init(void) +{ + unsigned long flags; + +#ifdef DEBUG + printk("init_module()\n"); +#endif + + save_flags(flags); + cli(); + stl_init(); + restore_flags(flags); + + return(0); +} + +/*****************************************************************************/ + +static void __exit stallion_module_exit(void) +{ + stlbrd_t *brdp; + stlpanel_t *panelp; + stlport_t *portp; + unsigned long flags; + int i, j, k; + +#ifdef DEBUG + printk("cleanup_module()\n"); +#endif + + printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, + stl_drvversion); + + save_flags(flags); + cli(); + +/* + * Free up all allocated resources used by the ports. This includes + * memory and interrupts. As part of this process we will also do + * a hangup on every open port - to try to flush out any processes + * hanging onto ports. + */ + i = tty_unregister_driver(stl_serial); + put_tty_driver(stl_serial); + if (i) { + printk("STALLION: failed to un-register tty driver, " + "errno=%d\n", -i); + restore_flags(flags); + return; + } + for (i = 0; i < 4; i++) { + devfs_remove("staliomem/%d", i); + class_simple_device_remove(MKDEV(STL_SIOMEMMAJOR, i)); + } + devfs_remove("staliomem"); + if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) + printk("STALLION: failed to un-register serial memory device, " + "errno=%d\n", -i); + class_simple_destroy(stallion_class); + + if (stl_tmpwritebuf != (char *) NULL) + kfree(stl_tmpwritebuf); + + for (i = 0; (i < stl_nrbrds); i++) { + if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) + continue; + + free_irq(brdp->irq, brdp); + + for (j = 0; (j < STL_MAXPANELS); j++) { + panelp = brdp->panels[j]; + if (panelp == (stlpanel_t *) NULL) + continue; + for (k = 0; (k < STL_PORTSPERPANEL); k++) { + portp = panelp->ports[k]; + if (portp == (stlport_t *) NULL) + continue; + if (portp->tty != (struct tty_struct *) NULL) + stl_hangup(portp->tty); + if (portp->tx.buf != (char *) NULL) + kfree(portp->tx.buf); + kfree(portp); + } + kfree(panelp); + } + + release_region(brdp->ioaddr1, brdp->iosize1); + if (brdp->iosize2 > 0) + release_region(brdp->ioaddr2, brdp->iosize2); + + kfree(brdp); + stl_brds[i] = (stlbrd_t *) NULL; + } + + restore_flags(flags); +} + +module_init(stallion_module_init); +module_exit(stallion_module_exit); + +/*****************************************************************************/ + +/* + * Check for any arguments passed in on the module load command line. + */ + +static void stl_argbrds(void) +{ + stlconf_t conf; + stlbrd_t *brdp; + int i; + +#ifdef DEBUG + printk("stl_argbrds()\n"); +#endif + + for (i = stl_nrbrds; (i < stl_nargs); i++) { + memset(&conf, 0, sizeof(conf)); + if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) + continue; + if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) + continue; + stl_nrbrds = i + 1; + brdp->brdnr = i; + brdp->brdtype = conf.brdtype; + brdp->ioaddr1 = conf.ioaddr1; + brdp->ioaddr2 = conf.ioaddr2; + brdp->irq = conf.irq; + brdp->irqtype = conf.irqtype; + stl_brdinit(brdp); + } +} + +/*****************************************************************************/ + +/* + * Convert an ascii string number into an unsigned long. + */ + +static unsigned long stl_atol(char *str) +{ + unsigned long val; + int base, c; + char *sp; + + val = 0; + sp = str; + if ((*sp == '0') && (*(sp+1) == 'x')) { + base = 16; + sp += 2; + } else if (*sp == '0') { + base = 8; + sp++; + } else { + base = 10; + } + + for (; (*sp != 0); sp++) { + c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); + if ((c < 0) || (c >= base)) { + printk("STALLION: invalid argument %s\n", str); + val = 0; + break; + } + val = (val * base) + c; + } + return(val); +} + +/*****************************************************************************/ + +/* + * Parse the supplied argument string, into the board conf struct. + */ + +static int stl_parsebrd(stlconf_t *confp, char **argp) +{ + char *sp; + int nrbrdnames, i; + +#ifdef DEBUG + printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp); +#endif + + if ((argp[0] == (char *) NULL) || (*argp[0] == 0)) + return(0); + + for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) + *sp = TOLOWER(*sp); + + nrbrdnames = sizeof(stl_brdstr) / sizeof(stlbrdtype_t); + for (i = 0; (i < nrbrdnames); i++) { + if (strcmp(stl_brdstr[i].name, argp[0]) == 0) + break; + } + if (i >= nrbrdnames) { + printk("STALLION: unknown board name, %s?\n", argp[0]); + return(0); + } + + confp->brdtype = stl_brdstr[i].type; + + i = 1; + if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) + confp->ioaddr1 = stl_atol(argp[i]); + i++; + if (confp->brdtype == BRD_ECH) { + if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) + confp->ioaddr2 = stl_atol(argp[i]); + i++; + } + if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) + confp->irq = stl_atol(argp[i]); + return(1); +} + +/*****************************************************************************/ + +/* + * Local driver kernel memory allocation routine. + */ + +static void *stl_memalloc(int len) +{ + return((void *) kmalloc(len, GFP_KERNEL)); +} + +/*****************************************************************************/ + +/* + * Allocate a new board structure. Fill out the basic info in it. + */ + +static stlbrd_t *stl_allocbrd(void) +{ + stlbrd_t *brdp; + + brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t)); + if (brdp == (stlbrd_t *) NULL) { + printk("STALLION: failed to allocate memory (size=%d)\n", + sizeof(stlbrd_t)); + return((stlbrd_t *) NULL); + } + + memset(brdp, 0, sizeof(stlbrd_t)); + brdp->magic = STL_BOARDMAGIC; + return(brdp); +} + +/*****************************************************************************/ + +static int stl_open(struct tty_struct *tty, struct file *filp) +{ + stlport_t *portp; + stlbrd_t *brdp; + unsigned int minordev; + int brdnr, panelnr, portnr, rc; + +#ifdef DEBUG + printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty, + (int) filp, tty->name); +#endif + + minordev = tty->index; + brdnr = MINOR2BRD(minordev); + if (brdnr >= stl_nrbrds) + return(-ENODEV); + brdp = stl_brds[brdnr]; + if (brdp == (stlbrd_t *) NULL) + return(-ENODEV); + minordev = MINOR2PORT(minordev); + for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { + if (brdp->panels[panelnr] == (stlpanel_t *) NULL) + break; + if (minordev < brdp->panels[panelnr]->nrports) { + portnr = minordev; + break; + } + minordev -= brdp->panels[panelnr]->nrports; + } + if (portnr < 0) + return(-ENODEV); + + portp = brdp->panels[panelnr]->ports[portnr]; + if (portp == (stlport_t *) NULL) + return(-ENODEV); + +/* + * On the first open of the device setup the port hardware, and + * initialize the per port data structure. + */ + portp->tty = tty; + tty->driver_data = portp; + portp->refcount++; + + if ((portp->flags & ASYNC_INITIALIZED) == 0) { + if (portp->tx.buf == (char *) NULL) { + portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE); + if (portp->tx.buf == (char *) NULL) + return(-ENOMEM); + portp->tx.head = portp->tx.buf; + portp->tx.tail = portp->tx.buf; + } + stl_setport(portp, tty->termios); + portp->sigs = stl_getsignals(portp); + stl_setsignals(portp, 1, 1); + stl_enablerxtx(portp, 1, 1); + stl_startrxtx(portp, 1, 0); + clear_bit(TTY_IO_ERROR, &tty->flags); + portp->flags |= ASYNC_INITIALIZED; + } + +/* + * Check if this port is in the middle of closing. If so then wait + * until it is closed then return error status, based on flag settings. + * The sleep here does not need interrupt protection since the wakeup + * for it is done with the same context. + */ + if (portp->flags & ASYNC_CLOSING) { + interruptible_sleep_on(&portp->close_wait); + if (portp->flags & ASYNC_HUP_NOTIFY) + return(-EAGAIN); + return(-ERESTARTSYS); + } + +/* + * Based on type of open being done check if it can overlap with any + * previous opens still in effect. If we are a normal serial device + * then also we might have to wait for carrier. + */ + if (!(filp->f_flags & O_NONBLOCK)) { + if ((rc = stl_waitcarrier(portp, filp)) != 0) + return(rc); + } + portp->flags |= ASYNC_NORMAL_ACTIVE; + + return(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 stl_waitcarrier(stlport_t *portp, struct file *filp) +{ + unsigned long flags; + int rc, doclocal; + +#ifdef DEBUG + printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); +#endif + + rc = 0; + doclocal = 0; + + if (portp->tty->termios->c_cflag & CLOCAL) + doclocal++; + + save_flags(flags); + cli(); + portp->openwaitcnt++; + if (! tty_hung_up_p(filp)) + portp->refcount--; + + for (;;) { + stl_setsignals(portp, 1, 1); + if (tty_hung_up_p(filp) || + ((portp->flags & ASYNC_INITIALIZED) == 0)) { + if (portp->flags & ASYNC_HUP_NOTIFY) + rc = -EBUSY; + else + rc = -ERESTARTSYS; + break; + } + if (((portp->flags & ASYNC_CLOSING) == 0) && + (doclocal || (portp->sigs & TIOCM_CD))) { + break; + } + if (signal_pending(current)) { + rc = -ERESTARTSYS; + break; + } + interruptible_sleep_on(&portp->open_wait); + } + + if (! tty_hung_up_p(filp)) + portp->refcount++; + portp->openwaitcnt--; + restore_flags(flags); + + return(rc); +} + +/*****************************************************************************/ + +static void stl_close(struct tty_struct *tty, struct file *filp) +{ + stlport_t *portp; + unsigned long flags; + +#ifdef DEBUG + printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); +#endif + + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + save_flags(flags); + cli(); + if (tty_hung_up_p(filp)) { + restore_flags(flags); + return; + } + if ((tty->count == 1) && (portp->refcount != 1)) + portp->refcount = 1; + if (portp->refcount-- > 1) { + restore_flags(flags); + return; + } + + portp->refcount = 0; + portp->flags |= ASYNC_CLOSING; + +/* + * May want to wait for any data to drain before closing. The BUSY + * flag keeps track of whether we are still sending or not - it is + * very accurate for the cd1400, not quite so for the sc26198. + * (The sc26198 has no "end-of-data" interrupt only empty FIFO) + */ + tty->closing = 1; + if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) + tty_wait_until_sent(tty, portp->closing_wait); + stl_waituntilsent(tty, (HZ / 2)); + + portp->flags &= ~ASYNC_INITIALIZED; + stl_disableintrs(portp); + if (tty->termios->c_cflag & HUPCL) + stl_setsignals(portp, 0, 0); + stl_enablerxtx(portp, 0, 0); + stl_flushbuffer(tty); + portp->istate = 0; + if (portp->tx.buf != (char *) NULL) { + kfree(portp->tx.buf); + portp->tx.buf = (char *) NULL; + portp->tx.head = (char *) NULL; + portp->tx.tail = (char *) NULL; + } + set_bit(TTY_IO_ERROR, &tty->flags); + tty_ldisc_flush(tty); + + tty->closing = 0; + portp->tty = (struct tty_struct *) NULL; + + if (portp->openwaitcnt) { + if (portp->close_delay) + msleep_interruptible(jiffies_to_msecs(portp->close_delay)); + wake_up_interruptible(&portp->open_wait); + } + + portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + wake_up_interruptible(&portp->close_wait); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Write routine. Take data and stuff it in to the TX ring queue. + * If transmit interrupts are not running then start them. + */ + +static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) +{ + stlport_t *portp; + unsigned int len, stlen; + unsigned char *chbuf; + char *head, *tail; + +#ifdef DEBUG + printk("stl_write(tty=%x,buf=%x,count=%d)\n", + (int) tty, (int) buf, count); +#endif + + if ((tty == (struct tty_struct *) NULL) || + (stl_tmpwritebuf == (char *) NULL)) + return(0); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(0); + if (portp->tx.buf == (char *) NULL) + return(0); + +/* + * If copying direct from user space we must cater for page faults, + * causing us to "sleep" here for a while. To handle this copy in all + * the data we need now, into a local buffer. Then when we got it all + * copy it into the TX buffer. + */ + chbuf = (unsigned char *) buf; + + head = portp->tx.head; + tail = portp->tx.tail; + if (head >= tail) { + len = STL_TXBUFSIZE - (head - tail) - 1; + stlen = STL_TXBUFSIZE - (head - portp->tx.buf); + } else { + len = tail - head - 1; + stlen = len; + } + + len = MIN(len, count); + count = 0; + while (len > 0) { + stlen = MIN(len, stlen); + memcpy(head, chbuf, stlen); + len -= stlen; + chbuf += stlen; + count += stlen; + head += stlen; + if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { + head = portp->tx.buf; + stlen = tail - head; + } + } + portp->tx.head = head; + + clear_bit(ASYI_TXLOW, &portp->istate); + stl_startrxtx(portp, -1, 1); + + return(count); +} + +/*****************************************************************************/ + +static void stl_putchar(struct tty_struct *tty, unsigned char ch) +{ + stlport_t *portp; + unsigned int len; + char *head, *tail; + +#ifdef DEBUG + printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + if (portp->tx.buf == (char *) NULL) + return; + + head = portp->tx.head; + tail = portp->tx.tail; + + len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); + len--; + + if (len > 0) { + *head++ = ch; + if (head >= (portp->tx.buf + STL_TXBUFSIZE)) + head = portp->tx.buf; + } + portp->tx.head = head; +} + +/*****************************************************************************/ + +/* + * If there are any characters in the buffer then make sure that TX + * interrupts are on and get'em out. Normally used after the putchar + * routine has been called. + */ + +static void stl_flushchars(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_flushchars(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + if (portp->tx.buf == (char *) NULL) + return; + +#if 0 + if (tty->stopped || tty->hw_stopped || + (portp->tx.head == portp->tx.tail)) + return; +#endif + stl_startrxtx(portp, -1, 1); +} + +/*****************************************************************************/ + +static int stl_writeroom(struct tty_struct *tty) +{ + stlport_t *portp; + char *head, *tail; + +#ifdef DEBUG + printk("stl_writeroom(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return(0); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(0); + if (portp->tx.buf == (char *) NULL) + return(0); + + head = portp->tx.head; + tail = portp->tx.tail; + return((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); +} + +/*****************************************************************************/ + +/* + * Return number of chars in the TX buffer. Normally we would just + * calculate the number of chars in the buffer and return that, but if + * the buffer is empty and TX interrupts are still on then we return + * that the buffer still has 1 char in it. This way whoever called us + * will not think that ALL chars have drained - since the UART still + * must have some chars in it (we are busy after all). + */ + +static int stl_charsinbuffer(struct tty_struct *tty) +{ + stlport_t *portp; + unsigned int size; + char *head, *tail; + +#ifdef DEBUG + printk("stl_charsinbuffer(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return(0); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(0); + if (portp->tx.buf == (char *) NULL) + return(0); + + head = portp->tx.head; + tail = portp->tx.tail; + size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); + if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) + size = 1; + return(size); +} + +/*****************************************************************************/ + +/* + * Generate the serial struct info. + */ + +static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp) +{ + struct serial_struct sio; + stlbrd_t *brdp; + +#ifdef DEBUG + printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); +#endif + + memset(&sio, 0, sizeof(struct serial_struct)); + sio.line = portp->portnr; + sio.port = portp->ioaddr; + sio.flags = portp->flags; + sio.baud_base = portp->baud_base; + sio.close_delay = portp->close_delay; + sio.closing_wait = portp->closing_wait; + sio.custom_divisor = portp->custom_divisor; + sio.hub6 = 0; + if (portp->uartp == &stl_cd1400uart) { + sio.type = PORT_CIRRUS; + sio.xmit_fifo_size = CD1400_TXFIFOSIZE; + } else { + sio.type = PORT_UNKNOWN; + sio.xmit_fifo_size = SC26198_TXFIFOSIZE; + } + + brdp = stl_brds[portp->brdnr]; + if (brdp != (stlbrd_t *) NULL) + sio.irq = brdp->irq; + + 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 stl_setserial(stlport_t *portp, struct serial_struct __user *sp) +{ + struct serial_struct sio; + +#ifdef DEBUG + printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); +#endif + + if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) + return -EFAULT; + if (!capable(CAP_SYS_ADMIN)) { + if ((sio.baud_base != portp->baud_base) || + (sio.close_delay != portp->close_delay) || + ((sio.flags & ~ASYNC_USR_MASK) != + (portp->flags & ~ASYNC_USR_MASK))) + return(-EPERM); + } + + portp->flags = (portp->flags & ~ASYNC_USR_MASK) | + (sio.flags & ASYNC_USR_MASK); + portp->baud_base = sio.baud_base; + portp->close_delay = sio.close_delay; + portp->closing_wait = sio.closing_wait; + portp->custom_divisor = sio.custom_divisor; + stl_setport(portp, portp->tty->termios); + return(0); +} + +/*****************************************************************************/ + +static int stl_tiocmget(struct tty_struct *tty, struct file *file) +{ + stlport_t *portp; + + if (tty == (struct tty_struct *) NULL) + return(-ENODEV); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(-ENODEV); + if (tty->flags & (1 << TTY_IO_ERROR)) + return(-EIO); + + return stl_getsignals(portp); +} + +static int stl_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + stlport_t *portp; + int rts = -1, dtr = -1; + + if (tty == (struct tty_struct *) NULL) + return(-ENODEV); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(-ENODEV); + 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; + + stl_setsignals(portp, dtr, rts); + return 0; +} + +static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) +{ + stlport_t *portp; + unsigned int ival; + int rc; + void __user *argp = (void __user *)arg; + +#ifdef DEBUG + printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", + (int) tty, (int) file, cmd, (int) arg); +#endif + + if (tty == (struct tty_struct *) NULL) + return(-ENODEV); + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return(-ENODEV); + + if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && + (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { + if (tty->flags & (1 << TTY_IO_ERROR)) + return(-EIO); + } + + rc = 0; + + switch (cmd) { + case TIOCGSOFTCAR: + rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), + (unsigned __user *) argp); + break; + case TIOCSSOFTCAR: + if (get_user(ival, (unsigned int __user *) arg)) + return -EFAULT; + tty->termios->c_cflag = + (tty->termios->c_cflag & ~CLOCAL) | + (ival ? CLOCAL : 0); + break; + case TIOCGSERIAL: + rc = stl_getserial(portp, argp); + break; + case TIOCSSERIAL: + rc = stl_setserial(portp, argp); + break; + case COM_GETPORTSTATS: + rc = stl_getportstats(portp, argp); + break; + case COM_CLRPORTSTATS: + rc = stl_clrportstats(portp, argp); + break; + case TIOCSERCONFIG: + case TIOCSERGWILD: + case TIOCSERSWILD: + case TIOCSERGETLSR: + case TIOCSERGSTRUCT: + case TIOCSERGETMULTI: + case TIOCSERSETMULTI: + default: + rc = -ENOIOCTLCMD; + break; + } + + return(rc); +} + +/*****************************************************************************/ + +static void stl_settermios(struct tty_struct *tty, struct termios *old) +{ + stlport_t *portp; + struct termios *tiosp; + +#ifdef DEBUG + printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + tiosp = tty->termios; + if ((tiosp->c_cflag == old->c_cflag) && + (tiosp->c_iflag == old->c_iflag)) + return; + + stl_setport(portp, tiosp); + stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), + -1); + if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { + tty->hw_stopped = 0; + stl_start(tty); + } + if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) + wake_up_interruptible(&portp->open_wait); +} + +/*****************************************************************************/ + +/* + * Attempt to flow control who ever is sending us data. Based on termios + * settings use software or/and hardware flow control. + */ + +static void stl_throttle(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_throttle(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + stl_flowctrl(portp, 0); +} + +/*****************************************************************************/ + +/* + * Unflow control the device sending us data... + */ + +static void stl_unthrottle(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_unthrottle(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + stl_flowctrl(portp, 1); +} + +/*****************************************************************************/ + +/* + * Stop the transmitter. Basically to do this we will just turn TX + * interrupts off. + */ + +static void stl_stop(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_stop(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + stl_startrxtx(portp, -1, 0); +} + +/*****************************************************************************/ + +/* + * Start the transmitter again. Just turn TX interrupts back on. + */ + +static void stl_start(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_start(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + stl_startrxtx(portp, -1, 1); +} + +/*****************************************************************************/ + +/* + * 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. + */ + +static void stl_hangup(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_hangup(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + portp->flags &= ~ASYNC_INITIALIZED; + stl_disableintrs(portp); + if (tty->termios->c_cflag & HUPCL) + stl_setsignals(portp, 0, 0); + stl_enablerxtx(portp, 0, 0); + stl_flushbuffer(tty); + portp->istate = 0; + set_bit(TTY_IO_ERROR, &tty->flags); + if (portp->tx.buf != (char *) NULL) { + kfree(portp->tx.buf); + portp->tx.buf = (char *) NULL; + portp->tx.head = (char *) NULL; + portp->tx.tail = (char *) NULL; + } + portp->tty = (struct tty_struct *) NULL; + portp->flags &= ~ASYNC_NORMAL_ACTIVE; + portp->refcount = 0; + wake_up_interruptible(&portp->open_wait); +} + +/*****************************************************************************/ + +static void stl_flushbuffer(struct tty_struct *tty) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_flushbuffer(tty=%x)\n", (int) tty); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + stl_flush(portp); + tty_wakeup(tty); +} + +/*****************************************************************************/ + +static void stl_breakctl(struct tty_struct *tty, int state) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + stl_sendbreak(portp, ((state == -1) ? 1 : 2)); +} + +/*****************************************************************************/ + +static void stl_waituntilsent(struct tty_struct *tty, int timeout) +{ + stlport_t *portp; + unsigned long tend; + +#ifdef DEBUG + printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + if (timeout == 0) + timeout = HZ; + tend = jiffies + timeout; + + while (stl_datastate(portp)) { + if (signal_pending(current)) + break; + msleep_interruptible(20); + if (time_after_eq(jiffies, tend)) + break; + } +} + +/*****************************************************************************/ + +static void stl_sendxchar(struct tty_struct *tty, char ch) +{ + stlport_t *portp; + +#ifdef DEBUG + printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch); +#endif + + if (tty == (struct tty_struct *) NULL) + return; + portp = tty->driver_data; + if (portp == (stlport_t *) NULL) + return; + + if (ch == STOP_CHAR(tty)) + stl_sendflow(portp, 0); + else if (ch == START_CHAR(tty)) + stl_sendflow(portp, 1); + else + stl_putchar(tty, ch); +} + +/*****************************************************************************/ + +#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 stl_portinfo(stlport_t *portp, int portnr, char *pos) +{ + char *sp; + int sigs, cnt; + + sp = pos; + sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", + portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", + (int) portp->stats.txtotal, (int) portp->stats.rxtotal); + + if (portp->stats.rxframing) + sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); + if (portp->stats.rxparity) + sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); + if (portp->stats.rxbreaks) + sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); + if (portp->stats.rxoverrun) + sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); + + sigs = stl_getsignals(portp); + cnt = sprintf(sp, "%s%s%s%s%s ", + (sigs & TIOCM_RTS) ? "|RTS" : "", + (sigs & TIOCM_CTS) ? "|CTS" : "", + (sigs & TIOCM_DTR) ? "|DTR" : "", + (sigs & TIOCM_CD) ? "|DCD" : "", + (sigs & 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 stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) +{ + stlbrd_t *brdp; + stlpanel_t *panelp; + stlport_t *portp; + int brdnr, panelnr, portnr, totalport; + int curoff, maxoff; + char *pos; + +#ifdef DEBUG + printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x," + "data=%x\n", (int) page, (int) start, (int) off, count, + (int) eof, (int) data); +#endif + + pos = page; + totalport = 0; + curoff = 0; + + if (off == 0) { + pos += sprintf(pos, "%s: version %s", stl_drvtitle, + stl_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 < stl_nrbrds); brdnr++) { + brdp = stl_brds[brdnr]; + if (brdp == (stlbrd_t *) NULL) + continue; + if (brdp->state == 0) + continue; + + maxoff = curoff + (brdp->nrports * MAXLINE); + if (off >= maxoff) { + curoff = maxoff; + continue; + } + + totalport = brdnr * STL_MAXPORTS; + for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { + panelp = brdp->panels[panelnr]; + if (panelp == (stlpanel_t *) NULL) + continue; + + maxoff = curoff + (panelp->nrports * MAXLINE); + if (off >= maxoff) { + curoff = maxoff; + totalport += panelp->nrports; + continue; + } + + for (portnr = 0; (portnr < panelp->nrports); portnr++, + totalport++) { + portp = panelp->ports[portnr]; + if (portp == (stlport_t *) NULL) + continue; + if (off >= (curoff += MAXLINE)) + continue; + if ((pos - page + MAXLINE) > count) + goto stl_readdone; + pos += stl_portinfo(portp, totalport, pos); + } + } + } + + *eof = 1; + +stl_readdone: + *start = page; + return(pos - page); +} + +/*****************************************************************************/ + +/* + * All board interrupts are vectored through here first. This code then + * calls off to the approrpriate board interrupt handlers. + */ + +static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs) +{ + stlbrd_t *brdp = (stlbrd_t *) dev_id; + +#ifdef DEBUG + printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq, + (int) regs); +#endif + + return IRQ_RETVAL((* brdp->isr)(brdp)); +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for EasyIO board types. + */ + +static int stl_eiointr(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int iobase; + int handled = 0; + + panelp = brdp->panels[0]; + iobase = panelp->iobase; + while (inb(brdp->iostatus) & EIO_INTRPEND) { + handled = 1; + (* panelp->isr)(panelp, iobase); + } + return handled; +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for ECH-AT board types. + */ + +static int stl_echatintr(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int ioaddr; + int bnknr; + int handled = 0; + + outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); + + while (inb(brdp->iostatus) & ECH_INTRPEND) { + handled = 1; + for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { + ioaddr = brdp->bnkstataddr[bnknr]; + if (inb(ioaddr) & ECH_PNLINTRPEND) { + panelp = brdp->bnk2panel[bnknr]; + (* panelp->isr)(panelp, (ioaddr & 0xfffc)); + } + } + } + + outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); + + return handled; +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for ECH-MCA board types. + */ + +static int stl_echmcaintr(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int ioaddr; + int bnknr; + int handled = 0; + + while (inb(brdp->iostatus) & ECH_INTRPEND) { + handled = 1; + for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { + ioaddr = brdp->bnkstataddr[bnknr]; + if (inb(ioaddr) & ECH_PNLINTRPEND) { + panelp = brdp->bnk2panel[bnknr]; + (* panelp->isr)(panelp, (ioaddr & 0xfffc)); + } + } + } + return handled; +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for ECH-PCI board types. + */ + +static int stl_echpciintr(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int ioaddr; + int bnknr, recheck; + int handled = 0; + + while (1) { + recheck = 0; + for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { + outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); + ioaddr = brdp->bnkstataddr[bnknr]; + if (inb(ioaddr) & ECH_PNLINTRPEND) { + panelp = brdp->bnk2panel[bnknr]; + (* panelp->isr)(panelp, (ioaddr & 0xfffc)); + recheck++; + handled = 1; + } + } + if (! recheck) + break; + } + return handled; +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for ECH-8/64-PCI board types. + */ + +static int stl_echpci64intr(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int ioaddr; + int bnknr; + int handled = 0; + + while (inb(brdp->ioctrl) & 0x1) { + handled = 1; + for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { + ioaddr = brdp->bnkstataddr[bnknr]; + if (inb(ioaddr) & ECH_PNLINTRPEND) { + panelp = brdp->bnk2panel[bnknr]; + (* panelp->isr)(panelp, (ioaddr & 0xfffc)); + } + } + } + + return handled; +} + +/*****************************************************************************/ + +/* + * Service an off-level request for some channel. + */ +static void stl_offintr(void *private) +{ + stlport_t *portp; + struct tty_struct *tty; + unsigned int oldsigs; + + portp = private; + +#ifdef DEBUG + printk("stl_offintr(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return; + + tty = portp->tty; + if (tty == (struct tty_struct *) NULL) + return; + + lock_kernel(); + if (test_bit(ASYI_TXLOW, &portp->istate)) { + tty_wakeup(tty); + } + if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { + clear_bit(ASYI_DCDCHANGE, &portp->istate); + oldsigs = portp->sigs; + portp->sigs = stl_getsignals(portp); + if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) + wake_up_interruptible(&portp->open_wait); + if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { + if (portp->flags & ASYNC_CHECK_CD) + tty_hangup(tty); /* FIXME: module removal race here - AKPM */ + } + } + unlock_kernel(); +} + +/*****************************************************************************/ + +/* + * Initialize all the ports on a panel. + */ + +static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) +{ + stlport_t *portp; + int chipmask, i; + +#ifdef DEBUG + printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); +#endif + + chipmask = stl_panelinit(brdp, panelp); + +/* + * All UART's are initialized (if found!). Now go through and setup + * each ports data structures. + */ + for (i = 0; (i < panelp->nrports); i++) { + portp = (stlport_t *) stl_memalloc(sizeof(stlport_t)); + if (portp == (stlport_t *) NULL) { + printk("STALLION: failed to allocate memory " + "(size=%d)\n", sizeof(stlport_t)); + break; + } + memset(portp, 0, sizeof(stlport_t)); + + portp->magic = STL_PORTMAGIC; + portp->portnr = i; + portp->brdnr = panelp->brdnr; + portp->panelnr = panelp->panelnr; + portp->uartp = panelp->uartp; + portp->clk = brdp->clk; + portp->baud_base = STL_BAUDBASE; + portp->close_delay = STL_CLOSEDELAY; + portp->closing_wait = 30 * HZ; + INIT_WORK(&portp->tqueue, stl_offintr, portp); + init_waitqueue_head(&portp->open_wait); + init_waitqueue_head(&portp->close_wait); + portp->stats.brd = portp->brdnr; + portp->stats.panel = portp->panelnr; + portp->stats.port = portp->portnr; + panelp->ports[i] = portp; + stl_portinit(brdp, panelp, portp); + } + + return(0); +} + +/*****************************************************************************/ + +/* + * Try to find and initialize an EasyIO board. + */ + +static inline int stl_initeio(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int status; + char *name; + int rc; + +#ifdef DEBUG + printk("stl_initeio(brdp=%x)\n", (int) brdp); +#endif + + brdp->ioctrl = brdp->ioaddr1 + 1; + brdp->iostatus = brdp->ioaddr1 + 2; + + status = inb(brdp->iostatus); + if ((status & EIO_IDBITMASK) == EIO_MK3) + brdp->ioctrl++; + +/* + * Handle board specific stuff now. The real difference is PCI + * or not PCI. + */ + if (brdp->brdtype == BRD_EASYIOPCI) { + brdp->iosize1 = 0x80; + brdp->iosize2 = 0x80; + name = "serial(EIO-PCI)"; + outb(0x41, (brdp->ioaddr2 + 0x4c)); + } else { + brdp->iosize1 = 8; + name = "serial(EIO)"; + if ((brdp->irq < 0) || (brdp->irq > 15) || + (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { + printk("STALLION: invalid irq=%d for brd=%d\n", + brdp->irq, brdp->brdnr); + return(-EINVAL); + } + outb((stl_vecmap[brdp->irq] | EIO_0WS | + ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), + brdp->ioctrl); + } + + if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { + printk(KERN_WARNING "STALLION: Warning, board %d I/O address " + "%x conflicts with another device\n", brdp->brdnr, + brdp->ioaddr1); + return(-EBUSY); + } + + if (brdp->iosize2 > 0) + if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { + printk(KERN_WARNING "STALLION: Warning, board %d I/O " + "address %x conflicts with another device\n", + brdp->brdnr, brdp->ioaddr2); + printk(KERN_WARNING "STALLION: Warning, also " + "releasing board %d I/O address %x \n", + brdp->brdnr, brdp->ioaddr1); + release_region(brdp->ioaddr1, brdp->iosize1); + return(-EBUSY); + } + +/* + * Everything looks OK, so let's go ahead and probe for the hardware. + */ + brdp->clk = CD1400_CLK; + brdp->isr = stl_eiointr; + + switch (status & EIO_IDBITMASK) { + case EIO_8PORTM: + brdp->clk = CD1400_CLK8M; + /* fall thru */ + case EIO_8PORTRS: + case EIO_8PORTDI: + brdp->nrports = 8; + break; + case EIO_4PORTRS: + brdp->nrports = 4; + break; + case EIO_MK3: + switch (status & EIO_BRDMASK) { + case ID_BRD4: + brdp->nrports = 4; + break; + case ID_BRD8: + brdp->nrports = 8; + break; + case ID_BRD16: + brdp->nrports = 16; + break; + default: + return(-ENODEV); + } + break; + default: + return(-ENODEV); + } + +/* + * We have verified that the board is actually present, so now we + * can complete the setup. + */ + + panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); + if (panelp == (stlpanel_t *) NULL) { + printk(KERN_WARNING "STALLION: failed to allocate memory " + "(size=%d)\n", sizeof(stlpanel_t)); + return(-ENOMEM); + } + memset(panelp, 0, sizeof(stlpanel_t)); + + panelp->magic = STL_PANELMAGIC; + panelp->brdnr = brdp->brdnr; + panelp->panelnr = 0; + panelp->nrports = brdp->nrports; + panelp->iobase = brdp->ioaddr1; + panelp->hwid = status; + if ((status & EIO_IDBITMASK) == EIO_MK3) { + panelp->uartp = (void *) &stl_sc26198uart; + panelp->isr = stl_sc26198intr; + } else { + panelp->uartp = (void *) &stl_cd1400uart; + panelp->isr = stl_cd1400eiointr; + } + + brdp->panels[0] = panelp; + brdp->nrpanels = 1; + brdp->state |= BRD_FOUND; + brdp->hwid = status; + if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { + printk("STALLION: failed to register interrupt " + "routine for %s irq=%d\n", name, brdp->irq); + rc = -ENODEV; + } else { + rc = 0; + } + return(rc); +} + +/*****************************************************************************/ + +/* + * Try to find an ECH board and initialize it. This code is capable of + * dealing with all types of ECH board. + */ + +static inline int stl_initech(stlbrd_t *brdp) +{ + stlpanel_t *panelp; + unsigned int status, nxtid, ioaddr, conflict; + int panelnr, banknr, i; + char *name; + +#ifdef DEBUG + printk("stl_initech(brdp=%x)\n", (int) brdp); +#endif + + status = 0; + conflict = 0; + +/* + * Set up the initial board register contents for boards. This varies a + * bit between the different board types. So we need to handle each + * separately. Also do a check that the supplied IRQ is good. + */ + switch (brdp->brdtype) { + + case BRD_ECH: + brdp->isr = stl_echatintr; + brdp->ioctrl = brdp->ioaddr1 + 1; + brdp->iostatus = brdp->ioaddr1 + 1; + status = inb(brdp->iostatus); + if ((status & ECH_IDBITMASK) != ECH_ID) + return(-ENODEV); + if ((brdp->irq < 0) || (brdp->irq > 15) || + (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { + printk("STALLION: invalid irq=%d for brd=%d\n", + brdp->irq, brdp->brdnr); + return(-EINVAL); + } + status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); + status |= (stl_vecmap[brdp->irq] << 1); + outb((status | ECH_BRDRESET), brdp->ioaddr1); + brdp->ioctrlval = ECH_INTENABLE | + ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); + for (i = 0; (i < 10); i++) + outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); + brdp->iosize1 = 2; + brdp->iosize2 = 32; + name = "serial(EC8/32)"; + outb(status, brdp->ioaddr1); + break; + + case BRD_ECHMC: + brdp->isr = stl_echmcaintr; + brdp->ioctrl = brdp->ioaddr1 + 0x20; + brdp->iostatus = brdp->ioctrl; + status = inb(brdp->iostatus); + if ((status & ECH_IDBITMASK) != ECH_ID) + return(-ENODEV); + if ((brdp->irq < 0) || (brdp->irq > 15) || + (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { + printk("STALLION: invalid irq=%d for brd=%d\n", + brdp->irq, brdp->brdnr); + return(-EINVAL); + } + outb(ECHMC_BRDRESET, brdp->ioctrl); + outb(ECHMC_INTENABLE, brdp->ioctrl); + brdp->iosize1 = 64; + name = "serial(EC8/32-MC)"; + break; + + case BRD_ECHPCI: + brdp->isr = stl_echpciintr; + brdp->ioctrl = brdp->ioaddr1 + 2; + brdp->iosize1 = 4; + brdp->iosize2 = 8; + name = "serial(EC8/32-PCI)"; + break; + + case BRD_ECH64PCI: + brdp->isr = stl_echpci64intr; + brdp->ioctrl = brdp->ioaddr2 + 0x40; + outb(0x43, (brdp->ioaddr1 + 0x4c)); + brdp->iosize1 = 0x80; + brdp->iosize2 = 0x80; + name = "serial(EC8/64-PCI)"; + break; + + default: + printk("STALLION: unknown board type=%d\n", brdp->brdtype); + return(-EINVAL); + break; + } + +/* + * Check boards for possible IO address conflicts and return fail status + * if an IO conflict found. + */ + if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { + printk(KERN_WARNING "STALLION: Warning, board %d I/O address " + "%x conflicts with another device\n", brdp->brdnr, + brdp->ioaddr1); + return(-EBUSY); + } + + if (brdp->iosize2 > 0) + if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { + printk(KERN_WARNING "STALLION: Warning, board %d I/O " + "address %x conflicts with another device\n", + brdp->brdnr, brdp->ioaddr2); + printk(KERN_WARNING "STALLION: Warning, also " + "releasing board %d I/O address %x \n", + brdp->brdnr, brdp->ioaddr1); + release_region(brdp->ioaddr1, brdp->iosize1); + return(-EBUSY); + } + +/* + * Scan through the secondary io address space looking for panels. + * As we find'em allocate and initialize panel structures for each. + */ + brdp->clk = CD1400_CLK; + brdp->hwid = status; + + ioaddr = brdp->ioaddr2; + banknr = 0; + panelnr = 0; + nxtid = 0; + + for (i = 0; (i < STL_MAXPANELS); i++) { + if (brdp->brdtype == BRD_ECHPCI) { + outb(nxtid, brdp->ioctrl); + ioaddr = brdp->ioaddr2; + } + status = inb(ioaddr + ECH_PNLSTATUS); + if ((status & ECH_PNLIDMASK) != nxtid) + break; + panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t)); + if (panelp == (stlpanel_t *) NULL) { + printk("STALLION: failed to allocate memory " + "(size=%d)\n", sizeof(stlpanel_t)); + break; + } + memset(panelp, 0, sizeof(stlpanel_t)); + panelp->magic = STL_PANELMAGIC; + panelp->brdnr = brdp->brdnr; + panelp->panelnr = panelnr; + panelp->iobase = ioaddr; + panelp->pagenr = nxtid; + panelp->hwid = status; + brdp->bnk2panel[banknr] = panelp; + brdp->bnkpageaddr[banknr] = nxtid; + brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; + + if (status & ECH_PNLXPID) { + panelp->uartp = (void *) &stl_sc26198uart; + panelp->isr = stl_sc26198intr; + if (status & ECH_PNL16PORT) { + panelp->nrports = 16; + brdp->bnk2panel[banknr] = panelp; + brdp->bnkpageaddr[banknr] = nxtid; + brdp->bnkstataddr[banknr++] = ioaddr + 4 + + ECH_PNLSTATUS; + } else { + panelp->nrports = 8; + } + } else { + panelp->uartp = (void *) &stl_cd1400uart; + panelp->isr = stl_cd1400echintr; + if (status & ECH_PNL16PORT) { + panelp->nrports = 16; + panelp->ackmask = 0x80; + if (brdp->brdtype != BRD_ECHPCI) + ioaddr += EREG_BANKSIZE; + brdp->bnk2panel[banknr] = panelp; + brdp->bnkpageaddr[banknr] = ++nxtid; + brdp->bnkstataddr[banknr++] = ioaddr + + ECH_PNLSTATUS; + } else { + panelp->nrports = 8; + panelp->ackmask = 0xc0; + } + } + + nxtid++; + ioaddr += EREG_BANKSIZE; + brdp->nrports += panelp->nrports; + brdp->panels[panelnr++] = panelp; + if ((brdp->brdtype != BRD_ECHPCI) && + (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) + break; + } + + brdp->nrpanels = panelnr; + brdp->nrbnks = banknr; + if (brdp->brdtype == BRD_ECH) + outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); + + brdp->state |= BRD_FOUND; + if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { + printk("STALLION: failed to register interrupt " + "routine for %s irq=%d\n", name, brdp->irq); + i = -ENODEV; + } else { + i = 0; + } + + return(i); +} + +/*****************************************************************************/ + +/* + * Initialize and configure the specified board. + * Scan through all the boards in the configuration and see what we + * can find. Handle EIO and the ECH boards a little differently here + * since the initial search and setup is very different. + */ + +static int __init stl_brdinit(stlbrd_t *brdp) +{ + int i; + +#ifdef DEBUG + printk("stl_brdinit(brdp=%x)\n", (int) brdp); +#endif + + switch (brdp->brdtype) { + case BRD_EASYIO: + case BRD_EASYIOPCI: + stl_initeio(brdp); + break; + case BRD_ECH: + case BRD_ECHMC: + case BRD_ECHPCI: + case BRD_ECH64PCI: + stl_initech(brdp); + break; + default: + printk("STALLION: board=%d is unknown board type=%d\n", + brdp->brdnr, brdp->brdtype); + return(ENODEV); + } + + stl_brds[brdp->brdnr] = brdp; + if ((brdp->state & BRD_FOUND) == 0) { + printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", + stl_brdnames[brdp->brdtype], brdp->brdnr, + brdp->ioaddr1, brdp->irq); + return(ENODEV); + } + + for (i = 0; (i < STL_MAXPANELS); i++) + if (brdp->panels[i] != (stlpanel_t *) NULL) + stl_initports(brdp, brdp->panels[i]); + + printk("STALLION: %s found, board=%d io=%x irq=%d " + "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], + brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, + brdp->nrports); + return(0); +} + +/*****************************************************************************/ + +/* + * Find the next available board number that is free. + */ + +static inline int stl_getbrdnr(void) +{ + int i; + + for (i = 0; (i < STL_MAXBRDS); i++) { + if (stl_brds[i] == (stlbrd_t *) NULL) { + if (i >= stl_nrbrds) + stl_nrbrds = i + 1; + return(i); + } + } + return(-1); +} + +/*****************************************************************************/ + +#ifdef CONFIG_PCI + +/* + * We have a Stallion board. Allocate a board structure and + * initialize it. Read its IO and IRQ resources from PCI + * configuration space. + */ + +static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp) +{ + stlbrd_t *brdp; + +#ifdef DEBUG + printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, + devp->bus->number, devp->devfn); +#endif + + if (pci_enable_device(devp)) + return(-EIO); + if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) + return(-ENOMEM); + if ((brdp->brdnr = stl_getbrdnr()) < 0) { + printk("STALLION: too many boards found, " + "maximum supported %d\n", STL_MAXBRDS); + return(0); + } + brdp->brdtype = brdtype; + +/* + * Different Stallion boards use the BAR registers in different ways, + * so set up io addresses based on board type. + */ +#ifdef DEBUG + printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__, + pci_resource_start(devp, 0), pci_resource_start(devp, 1), + pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); +#endif + +/* + * We have all resources from the board, so let's setup the actual + * board structure now. + */ + switch (brdtype) { + case BRD_ECHPCI: + brdp->ioaddr2 = pci_resource_start(devp, 0); + brdp->ioaddr1 = pci_resource_start(devp, 1); + break; + case BRD_ECH64PCI: + brdp->ioaddr2 = pci_resource_start(devp, 2); + brdp->ioaddr1 = pci_resource_start(devp, 1); + break; + case BRD_EASYIOPCI: + brdp->ioaddr1 = pci_resource_start(devp, 2); + brdp->ioaddr2 = pci_resource_start(devp, 1); + break; + default: + printk("STALLION: unknown PCI board type=%d\n", brdtype); + break; + } + + brdp->irq = devp->irq; + stl_brdinit(brdp); + + return(0); +} + +/*****************************************************************************/ + +/* + * Find all Stallion PCI boards that might be installed. Initialize each + * one as it is found. + */ + + +static inline int stl_findpcibrds(void) +{ + struct pci_dev *dev = NULL; + int i, rc; + +#ifdef DEBUG + printk("stl_findpcibrds()\n"); +#endif + + for (i = 0; (i < stl_nrpcibrds); i++) + while ((dev = pci_find_device(stl_pcibrds[i].vendid, + stl_pcibrds[i].devid, dev))) { + +/* + * Found a device on the PCI bus that has our vendor and + * device ID. Need to check now that it is really us. + */ + if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) + continue; + + rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); + if (rc) + return(rc); + } + + return(0); +} + +#endif + +/*****************************************************************************/ + +/* + * Scan through all the boards in the configuration and see what we + * can find. Handle EIO and the ECH boards a little differently here + * since the initial search and setup is too different. + */ + +static inline int stl_initbrds(void) +{ + stlbrd_t *brdp; + stlconf_t *confp; + int i; + +#ifdef DEBUG + printk("stl_initbrds()\n"); +#endif + + if (stl_nrbrds > STL_MAXBRDS) { + printk("STALLION: too many boards in configuration table, " + "truncating to %d\n", STL_MAXBRDS); + stl_nrbrds = STL_MAXBRDS; + } + +/* + * Firstly scan the list of static boards configured. Allocate + * resources and initialize the boards as found. + */ + for (i = 0; (i < stl_nrbrds); i++) { + confp = &stl_brdconf[i]; + stl_parsebrd(confp, stl_brdsp[i]); + if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) + return(-ENOMEM); + brdp->brdnr = i; + brdp->brdtype = confp->brdtype; + brdp->ioaddr1 = confp->ioaddr1; + brdp->ioaddr2 = confp->ioaddr2; + brdp->irq = confp->irq; + brdp->irqtype = confp->irqtype; + stl_brdinit(brdp); + } + +/* + * Find any dynamically supported boards. That is via module load + * line options or auto-detected on the PCI bus. + */ + stl_argbrds(); +#ifdef CONFIG_PCI + stl_findpcibrds(); +#endif + + return(0); +} + +/*****************************************************************************/ + +/* + * Return the board stats structure to user app. + */ + +static int stl_getbrdstats(combrd_t __user *bp) +{ + stlbrd_t *brdp; + stlpanel_t *panelp; + int i; + + if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) + return -EFAULT; + if (stl_brdstats.brd >= STL_MAXBRDS) + return(-ENODEV); + brdp = stl_brds[stl_brdstats.brd]; + if (brdp == (stlbrd_t *) NULL) + return(-ENODEV); + + memset(&stl_brdstats, 0, sizeof(combrd_t)); + stl_brdstats.brd = brdp->brdnr; + stl_brdstats.type = brdp->brdtype; + stl_brdstats.hwid = brdp->hwid; + stl_brdstats.state = brdp->state; + stl_brdstats.ioaddr = brdp->ioaddr1; + stl_brdstats.ioaddr2 = brdp->ioaddr2; + stl_brdstats.irq = brdp->irq; + stl_brdstats.nrpanels = brdp->nrpanels; + stl_brdstats.nrports = brdp->nrports; + for (i = 0; (i < brdp->nrpanels); i++) { + panelp = brdp->panels[i]; + stl_brdstats.panels[i].panel = i; + stl_brdstats.panels[i].hwid = panelp->hwid; + stl_brdstats.panels[i].nrports = panelp->nrports; + } + + return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Resolve the referenced port number into a port struct pointer. + */ + +static stlport_t *stl_getport(int brdnr, int panelnr, int portnr) +{ + stlbrd_t *brdp; + stlpanel_t *panelp; + + if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) + return((stlport_t *) NULL); + brdp = stl_brds[brdnr]; + if (brdp == (stlbrd_t *) NULL) + return((stlport_t *) NULL); + if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) + return((stlport_t *) NULL); + panelp = brdp->panels[panelnr]; + if (panelp == (stlpanel_t *) NULL) + return((stlport_t *) NULL); + if ((portnr < 0) || (portnr >= panelp->nrports)) + return((stlport_t *) NULL); + return(panelp->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 stl_getportstats(stlport_t *portp, comstats_t __user *cp) +{ + unsigned char *head, *tail; + unsigned long flags; + + if (!portp) { + if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) + return -EFAULT; + portp = stl_getport(stl_comstats.brd, stl_comstats.panel, + stl_comstats.port); + if (portp == (stlport_t *) NULL) + return(-ENODEV); + } + + portp->stats.state = portp->istate; + portp->stats.flags = portp->flags; + portp->stats.hwid = portp->hwid; + + portp->stats.ttystate = 0; + portp->stats.cflags = 0; + portp->stats.iflags = 0; + portp->stats.oflags = 0; + portp->stats.lflags = 0; + portp->stats.rxbuffered = 0; + + save_flags(flags); + cli(); + if (portp->tty != (struct tty_struct *) NULL) { + if (portp->tty->driver_data == portp) { + portp->stats.ttystate = portp->tty->flags; + portp->stats.rxbuffered = portp->tty->flip.count; + if (portp->tty->termios != (struct termios *) NULL) { + portp->stats.cflags = portp->tty->termios->c_cflag; + portp->stats.iflags = portp->tty->termios->c_iflag; + portp->stats.oflags = portp->tty->termios->c_oflag; + portp->stats.lflags = portp->tty->termios->c_lflag; + } + } + } + restore_flags(flags); + + head = portp->tx.head; + tail = portp->tx.tail; + portp->stats.txbuffered = ((head >= tail) ? (head - tail) : + (STL_TXBUFSIZE - (tail - head))); + + portp->stats.signals = (unsigned long) stl_getsignals(portp); + + return copy_to_user(cp, &portp->stats, + sizeof(comstats_t)) ? -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Clear the port stats structure. We also return it zeroed out... + */ + +static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp) +{ + if (!portp) { + if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) + return -EFAULT; + portp = stl_getport(stl_comstats.brd, stl_comstats.panel, + stl_comstats.port); + if (portp == (stlport_t *) NULL) + return(-ENODEV); + } + + memset(&portp->stats, 0, sizeof(comstats_t)); + portp->stats.brd = portp->brdnr; + portp->stats.panel = portp->panelnr; + portp->stats.port = portp->portnr; + return copy_to_user(cp, &portp->stats, + sizeof(comstats_t)) ? -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Return the entire driver ports structure to a user app. + */ + +static int stl_getportstruct(stlport_t __user *arg) +{ + stlport_t *portp; + + if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t))) + return -EFAULT; + portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, + stl_dummyport.portnr); + if (!portp) + return -ENODEV; + return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * Return the entire driver board structure to a user app. + */ + +static int stl_getbrdstruct(stlbrd_t __user *arg) +{ + stlbrd_t *brdp; + + if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t))) + return -EFAULT; + if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) + return -ENODEV; + brdp = stl_brds[stl_dummybrd.brdnr]; + if (!brdp) + return(-ENODEV); + return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0; +} + +/*****************************************************************************/ + +/* + * The "staliomem" device is also required to do some special operations + * on the board and/or ports. In this driver it is mostly used for stats + * collection. + */ + +static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) +{ + int brdnr, rc; + void __user *argp = (void __user *)arg; + +#ifdef DEBUG + printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, + (int) fp, cmd, (int) arg); +#endif + + brdnr = iminor(ip); + if (brdnr >= STL_MAXBRDS) + return(-ENODEV); + rc = 0; + + switch (cmd) { + case COM_GETPORTSTATS: + rc = stl_getportstats(NULL, argp); + break; + case COM_CLRPORTSTATS: + rc = stl_clrportstats(NULL, argp); + break; + case COM_GETBRDSTATS: + rc = stl_getbrdstats(argp); + break; + case COM_READPORT: + rc = stl_getportstruct(argp); + break; + case COM_READBOARD: + rc = stl_getbrdstruct(argp); + break; + default: + rc = -ENOIOCTLCMD; + break; + } + + return(rc); +} + +static struct tty_operations stl_ops = { + .open = stl_open, + .close = stl_close, + .write = stl_write, + .put_char = stl_putchar, + .flush_chars = stl_flushchars, + .write_room = stl_writeroom, + .chars_in_buffer = stl_charsinbuffer, + .ioctl = stl_ioctl, + .set_termios = stl_settermios, + .throttle = stl_throttle, + .unthrottle = stl_unthrottle, + .stop = stl_stop, + .start = stl_start, + .hangup = stl_hangup, + .flush_buffer = stl_flushbuffer, + .break_ctl = stl_breakctl, + .wait_until_sent = stl_waituntilsent, + .send_xchar = stl_sendxchar, + .read_proc = stl_readproc, + .tiocmget = stl_tiocmget, + .tiocmset = stl_tiocmset, +}; + +/*****************************************************************************/ + +int __init stl_init(void) +{ + int i; + printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); + + stl_initbrds(); + + stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); + if (!stl_serial) + return -1; + +/* + * Allocate a temporary write buffer. + */ + stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE); + if (stl_tmpwritebuf == (char *) NULL) + printk("STALLION: failed to allocate memory (size=%d)\n", + STL_TXBUFSIZE); + +/* + * Set up a character driver for per board stuff. This is mainly used + * to do stats ioctls on the ports. + */ + if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) + printk("STALLION: failed to register serial board device\n"); + devfs_mk_dir("staliomem"); + + stallion_class = class_simple_create(THIS_MODULE, "staliomem"); + for (i = 0; i < 4; i++) { + devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i), + S_IFCHR|S_IRUSR|S_IWUSR, + "staliomem/%d", i); + class_simple_device_add(stallion_class, MKDEV(STL_SIOMEMMAJOR, i), NULL, "staliomem%d", i); + } + + stl_serial->owner = THIS_MODULE; + stl_serial->driver_name = stl_drvname; + stl_serial->name = "ttyE"; + stl_serial->devfs_name = "tts/E"; + stl_serial->major = STL_SERIALMAJOR; + stl_serial->minor_start = 0; + stl_serial->type = TTY_DRIVER_TYPE_SERIAL; + stl_serial->subtype = SERIAL_TYPE_NORMAL; + stl_serial->init_termios = stl_deftermios; + stl_serial->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(stl_serial, &stl_ops); + + if (tty_register_driver(stl_serial)) { + put_tty_driver(stl_serial); + printk("STALLION: failed to register serial driver\n"); + return -1; + } + + return(0); +} + +/*****************************************************************************/ +/* CD1400 HARDWARE FUNCTIONS */ +/*****************************************************************************/ + +/* + * These functions get/set/update the registers of the cd1400 UARTs. + * Access to the cd1400 registers is via an address/data io port pair. + * (Maybe should make this inline...) + */ + +static int stl_cd1400getreg(stlport_t *portp, int regnr) +{ + outb((regnr + portp->uartaddr), portp->ioaddr); + return(inb(portp->ioaddr + EREG_DATA)); +} + +static void stl_cd1400setreg(stlport_t *portp, int regnr, int value) +{ + outb((regnr + portp->uartaddr), portp->ioaddr); + outb(value, portp->ioaddr + EREG_DATA); +} + +static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value) +{ + outb((regnr + portp->uartaddr), portp->ioaddr); + if (inb(portp->ioaddr + EREG_DATA) != value) { + outb(value, portp->ioaddr + EREG_DATA); + return(1); + } + return(0); +} + +/*****************************************************************************/ + +/* + * Inbitialize the UARTs in a panel. We don't care what sort of board + * these ports are on - since the port io registers are almost + * identical when dealing with ports. + */ + +static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp) +{ + unsigned int gfrcr; + int chipmask, i, j; + int nrchips, uartaddr, ioaddr; + +#ifdef DEBUG + printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); +#endif + + BRDENABLE(panelp->brdnr, panelp->pagenr); + +/* + * Check that each chip is present and started up OK. + */ + chipmask = 0; + nrchips = panelp->nrports / CD1400_PORTS; + for (i = 0; (i < nrchips); i++) { + if (brdp->brdtype == BRD_ECHPCI) { + outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); + ioaddr = panelp->iobase; + } else { + ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); + } + uartaddr = (i & 0x01) ? 0x080 : 0; + outb((GFRCR + uartaddr), ioaddr); + outb(0, (ioaddr + EREG_DATA)); + outb((CCR + uartaddr), ioaddr); + outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); + outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); + outb((GFRCR + uartaddr), ioaddr); + for (j = 0; (j < CCR_MAXWAIT); j++) { + if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) + break; + } + if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { + printk("STALLION: cd1400 not responding, " + "brd=%d panel=%d chip=%d\n", + panelp->brdnr, panelp->panelnr, i); + continue; + } + chipmask |= (0x1 << i); + outb((PPR + uartaddr), ioaddr); + outb(PPR_SCALAR, (ioaddr + EREG_DATA)); + } + + BRDDISABLE(panelp->brdnr); + return(chipmask); +} + +/*****************************************************************************/ + +/* + * Initialize hardware specific port registers. + */ + +static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) +{ +#ifdef DEBUG + printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n", + (int) brdp, (int) panelp, (int) portp); +#endif + + if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || + (portp == (stlport_t *) NULL)) + return; + + portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || + (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); + portp->uartaddr = (portp->portnr & 0x04) << 5; + portp->pagenr = panelp->pagenr + (portp->portnr >> 3); + + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); + portp->hwid = stl_cd1400getreg(portp, GFRCR); + BRDDISABLE(portp->brdnr); +} + +/*****************************************************************************/ + +/* + * Wait for the command register to be ready. We will poll this, + * since it won't usually take too long to be ready. + */ + +static void stl_cd1400ccrwait(stlport_t *portp) +{ + int i; + + for (i = 0; (i < CCR_MAXWAIT); i++) { + if (stl_cd1400getreg(portp, CCR) == 0) { + return; + } + } + + printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", + portp->portnr, portp->panelnr, portp->brdnr); +} + +/*****************************************************************************/ + +/* + * Set up the cd1400 registers for a port based on the termios port + * settings. + */ + +static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp) +{ + stlbrd_t *brdp; + unsigned long flags; + unsigned int clkdiv, baudrate; + unsigned char cor1, cor2, cor3; + unsigned char cor4, cor5, ccr; + unsigned char srer, sreron, sreroff; + unsigned char mcor1, mcor2, rtpr; + unsigned char clk, div; + + cor1 = 0; + cor2 = 0; + cor3 = 0; + cor4 = 0; + cor5 = 0; + ccr = 0; + rtpr = 0; + clk = 0; + div = 0; + mcor1 = 0; + mcor2 = 0; + sreron = 0; + sreroff = 0; + + brdp = stl_brds[portp->brdnr]; + if (brdp == (stlbrd_t *) NULL) + return; + +/* + * Set up the RX char ignore mask with those RX error types we + * can ignore. We can get the cd1400 to help us out a little here, + * it will ignore parity errors and breaks for us. + */ + portp->rxignoremsk = 0; + if (tiosp->c_iflag & IGNPAR) { + portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); + cor1 |= COR1_PARIGNORE; + } + if (tiosp->c_iflag & IGNBRK) { + portp->rxignoremsk |= ST_BREAK; + cor4 |= COR4_IGNBRK; + } + + portp->rxmarkmsk = ST_OVERRUN; + if (tiosp->c_iflag & (INPCK | PARMRK)) + portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); + if (tiosp->c_iflag & BRKINT) + portp->rxmarkmsk |= ST_BREAK; + +/* + * Go through the char size, parity and stop bits and set all the + * option register appropriately. + */ + switch (tiosp->c_cflag & CSIZE) { + case CS5: + cor1 |= COR1_CHL5; + break; + case CS6: + cor1 |= COR1_CHL6; + break; + case CS7: + cor1 |= COR1_CHL7; + break; + default: + cor1 |= COR1_CHL8; + break; + } + + if (tiosp->c_cflag & CSTOPB) + cor1 |= COR1_STOP2; + else + cor1 |= COR1_STOP1; + + if (tiosp->c_cflag & PARENB) { + if (tiosp->c_cflag & PARODD) + cor1 |= (COR1_PARENB | COR1_PARODD); + else + cor1 |= (COR1_PARENB | COR1_PAREVEN); + } else { + cor1 |= COR1_PARNONE; + } + +/* + * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing + * space for hardware flow control and the like. This should be set to + * VMIN. Also here we will set the RX data timeout to 10ms - this should + * really be based on VTIME. + */ + cor3 |= FIFO_RXTHRESHOLD; + rtpr = 2; + +/* + * Calculate the baud rate timers. For now we will just assume that + * the input and output baud are the same. Could have used a baud + * table here, but this way we can generate virtually any baud rate + * we like! + */ + baudrate = tiosp->c_cflag & CBAUD; + if (baudrate & CBAUDEX) { + baudrate &= ~CBAUDEX; + if ((baudrate < 1) || (baudrate > 4)) + tiosp->c_cflag &= ~CBAUDEX; + else + baudrate += 15; + } + baudrate = stl_baudrates[baudrate]; + if ((tiosp->c_cflag & CBAUD) == B38400) { + if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + baudrate = 57600; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + baudrate = 115200; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) + baudrate = 230400; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) + baudrate = 460800; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) + baudrate = (portp->baud_base / portp->custom_divisor); + } + if (baudrate > STL_CD1400MAXBAUD) + baudrate = STL_CD1400MAXBAUD; + + if (baudrate > 0) { + for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { + clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); + if (clkdiv < 0x100) + break; + } + div = (unsigned char) clkdiv; + } + +/* + * Check what form of modem signaling is required and set it up. + */ + if ((tiosp->c_cflag & CLOCAL) == 0) { + mcor1 |= MCOR1_DCD; + mcor2 |= MCOR2_DCD; + sreron |= SRER_MODEM; + portp->flags |= ASYNC_CHECK_CD; + } else { + portp->flags &= ~ASYNC_CHECK_CD; + } + +/* + * Setup cd1400 enhanced modes if we can. In particular we want to + * handle as much of the flow control as possible automatically. As + * well as saving a few CPU cycles it will also greatly improve flow + * control reliability. + */ + if (tiosp->c_iflag & IXON) { + cor2 |= COR2_TXIBE; + cor3 |= COR3_SCD12; + if (tiosp->c_iflag & IXANY) + cor2 |= COR2_IXM; + } + + if (tiosp->c_cflag & CRTSCTS) { + cor2 |= COR2_CTSAE; + mcor1 |= FIFO_RTSTHRESHOLD; + } + +/* + * All cd1400 register values calculated so go through and set + * them all up. + */ + +#ifdef DEBUG + printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", + portp->portnr, portp->panelnr, portp->brdnr); + printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", + cor1, cor2, cor3, cor4, cor5); + printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", + mcor1, mcor2, rtpr, sreron, sreroff); + printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); + printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", + tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], + tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); + srer = stl_cd1400getreg(portp, SRER); + stl_cd1400setreg(portp, SRER, 0); + if (stl_cd1400updatereg(portp, COR1, cor1)) + ccr = 1; + if (stl_cd1400updatereg(portp, COR2, cor2)) + ccr = 1; + if (stl_cd1400updatereg(portp, COR3, cor3)) + ccr = 1; + if (ccr) { + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); + } + stl_cd1400setreg(portp, COR4, cor4); + stl_cd1400setreg(portp, COR5, cor5); + stl_cd1400setreg(portp, MCOR1, mcor1); + stl_cd1400setreg(portp, MCOR2, mcor2); + if (baudrate > 0) { + stl_cd1400setreg(portp, TCOR, clk); + stl_cd1400setreg(portp, TBPR, div); + stl_cd1400setreg(portp, RCOR, clk); + stl_cd1400setreg(portp, RBPR, div); + } + stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); + stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); + stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); + stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); + stl_cd1400setreg(portp, RTPR, rtpr); + mcor1 = stl_cd1400getreg(portp, MSVR1); + if (mcor1 & MSVR1_DCD) + portp->sigs |= TIOCM_CD; + else + portp->sigs &= ~TIOCM_CD; + stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Set the state of the DTR and RTS signals. + */ + +static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts) +{ + unsigned char msvr1, msvr2; + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n", + (int) portp, dtr, rts); +#endif + + msvr1 = 0; + msvr2 = 0; + if (dtr > 0) + msvr1 = MSVR1_DTR; + if (rts > 0) + msvr2 = MSVR2_RTS; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + if (rts >= 0) + stl_cd1400setreg(portp, MSVR2, msvr2); + if (dtr >= 0) + stl_cd1400setreg(portp, MSVR1, msvr1); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Return the state of the signals. + */ + +static int stl_cd1400getsignals(stlport_t *portp) +{ + unsigned char msvr1, msvr2; + unsigned long flags; + int sigs; + +#ifdef DEBUG + printk("stl_cd1400getsignals(portp=%x)\n", (int) portp); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + msvr1 = stl_cd1400getreg(portp, MSVR1); + msvr2 = stl_cd1400getreg(portp, MSVR2); + BRDDISABLE(portp->brdnr); + restore_flags(flags); + + sigs = 0; + sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; + sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; + sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; + sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; +#if 0 + sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; + sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; +#else + sigs |= TIOCM_DSR; +#endif + return(sigs); +} + +/*****************************************************************************/ + +/* + * Enable/Disable the Transmitter and/or Receiver. + */ + +static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx) +{ + unsigned char ccr; + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n", + (int) portp, rx, tx); +#endif + ccr = 0; + + if (tx == 0) + ccr |= CCR_TXDISABLE; + else if (tx > 0) + ccr |= CCR_TXENABLE; + if (rx == 0) + ccr |= CCR_RXDISABLE; + else if (rx > 0) + ccr |= CCR_RXENABLE; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, ccr); + stl_cd1400ccrwait(portp); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Start/stop the Transmitter and/or Receiver. + */ + +static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx) +{ + unsigned char sreron, sreroff; + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n", + (int) portp, rx, tx); +#endif + + sreron = 0; + sreroff = 0; + if (tx == 0) + sreroff |= (SRER_TXDATA | SRER_TXEMPTY); + else if (tx == 1) + sreron |= SRER_TXDATA; + else if (tx >= 2) + sreron |= SRER_TXEMPTY; + if (rx == 0) + sreroff |= SRER_RXDATA; + else if (rx > 0) + sreron |= SRER_RXDATA; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400setreg(portp, SRER, + ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); + BRDDISABLE(portp->brdnr); + if (tx > 0) + set_bit(ASYI_TXBUSY, &portp->istate); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Disable all interrupts from this port. + */ + +static void stl_cd1400disableintrs(stlport_t *portp) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp); +#endif + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400setreg(portp, SRER, 0); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +static void stl_cd1400sendbreak(stlport_t *portp, int len) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400setreg(portp, SRER, + ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | + SRER_TXEMPTY)); + BRDDISABLE(portp->brdnr); + portp->brklen = len; + if (len == 1) + portp->stats.txbreaks++; + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Take flow control actions... + */ + +static void stl_cd1400flowctrl(stlport_t *portp, int state) +{ + struct tty_struct *tty; + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state); +#endif + + if (portp == (stlport_t *) NULL) + return; + tty = portp->tty; + if (tty == (struct tty_struct *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + + if (state) { + if (tty->termios->c_iflag & IXOFF) { + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); + portp->stats.rxxon++; + stl_cd1400ccrwait(portp); + } +/* + * Question: should we return RTS to what it was before? It may + * have been set by an ioctl... Suppose not, since if you have + * hardware flow control set then it is pretty silly to go and + * set the RTS line by hand. + */ + if (tty->termios->c_cflag & CRTSCTS) { + stl_cd1400setreg(portp, MCOR1, + (stl_cd1400getreg(portp, MCOR1) | + FIFO_RTSTHRESHOLD)); + stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); + portp->stats.rxrtson++; + } + } else { + if (tty->termios->c_iflag & IXOFF) { + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); + portp->stats.rxxoff++; + stl_cd1400ccrwait(portp); + } + if (tty->termios->c_cflag & CRTSCTS) { + stl_cd1400setreg(portp, MCOR1, + (stl_cd1400getreg(portp, MCOR1) & 0xf0)); + stl_cd1400setreg(portp, MSVR2, 0); + portp->stats.rxrtsoff++; + } + } + + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Send a flow control character... + */ + +static void stl_cd1400sendflow(stlport_t *portp, int state) +{ + struct tty_struct *tty; + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state); +#endif + + if (portp == (stlport_t *) NULL) + return; + tty = portp->tty; + if (tty == (struct tty_struct *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + if (state) { + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); + portp->stats.rxxon++; + stl_cd1400ccrwait(portp); + } else { + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); + portp->stats.rxxoff++; + stl_cd1400ccrwait(portp); + } + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +static void stl_cd1400flush(stlport_t *portp) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_cd1400flush(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); + stl_cd1400ccrwait(portp); + stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); + stl_cd1400ccrwait(portp); + portp->tx.tail = portp->tx.head; + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Return the current state of data flow on this port. This is only + * really interresting when determining if data has fully completed + * transmission or not... This is easy for the cd1400, it accurately + * maintains the busy port flag. + */ + +static int stl_cd1400datastate(stlport_t *portp) +{ +#ifdef DEBUG + printk("stl_cd1400datastate(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return(0); + + return(test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0); +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for cd1400 EasyIO boards. + */ + +static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase) +{ + unsigned char svrtype; + +#ifdef DEBUG + printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n", + (int) panelp, iobase); +#endif + + outb(SVRR, iobase); + svrtype = inb(iobase + EREG_DATA); + if (panelp->nrports > 4) { + outb((SVRR + 0x80), iobase); + svrtype |= inb(iobase + EREG_DATA); + } + + if (svrtype & SVRR_RX) + stl_cd1400rxisr(panelp, iobase); + else if (svrtype & SVRR_TX) + stl_cd1400txisr(panelp, iobase); + else if (svrtype & SVRR_MDM) + stl_cd1400mdmisr(panelp, iobase); +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for cd1400 panels. + */ + +static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase) +{ + unsigned char svrtype; + +#ifdef DEBUG + printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp, + iobase); +#endif + + outb(SVRR, iobase); + svrtype = inb(iobase + EREG_DATA); + outb((SVRR + 0x80), iobase); + svrtype |= inb(iobase + EREG_DATA); + if (svrtype & SVRR_RX) + stl_cd1400rxisr(panelp, iobase); + else if (svrtype & SVRR_TX) + stl_cd1400txisr(panelp, iobase); + else if (svrtype & SVRR_MDM) + stl_cd1400mdmisr(panelp, iobase); +} + + +/*****************************************************************************/ + +/* + * Unfortunately we need to handle breaks in the TX data stream, since + * this is the only way to generate them on the cd1400. + */ + +static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr) +{ + if (portp->brklen == 1) { + outb((COR2 + portp->uartaddr), ioaddr); + outb((inb(ioaddr + EREG_DATA) | COR2_ETC), + (ioaddr + EREG_DATA)); + outb((TDR + portp->uartaddr), ioaddr); + outb(ETC_CMD, (ioaddr + EREG_DATA)); + outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); + outb((SRER + portp->uartaddr), ioaddr); + outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), + (ioaddr + EREG_DATA)); + return(1); + } else if (portp->brklen > 1) { + outb((TDR + portp->uartaddr), ioaddr); + outb(ETC_CMD, (ioaddr + EREG_DATA)); + outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); + portp->brklen = -1; + return(1); + } else { + outb((COR2 + portp->uartaddr), ioaddr); + outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), + (ioaddr + EREG_DATA)); + portp->brklen = 0; + } + return(0); +} + +/*****************************************************************************/ + +/* + * Transmit interrupt handler. This has gotta be fast! Handling TX + * chars is pretty simple, stuff as many as possible from the TX buffer + * into the cd1400 FIFO. Must also handle TX breaks here, since they + * are embedded as commands in the data stream. Oh no, had to use a goto! + * This could be optimized more, will do when I get time... + * In practice it is possible that interrupts are enabled but that the + * port has been hung up. Need to handle not having any TX buffer here, + * this is done by using the side effect that head and tail will also + * be NULL if the buffer has been freed. + */ + +static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr) +{ + stlport_t *portp; + int len, stlen; + char *head, *tail; + unsigned char ioack, srer; + +#ifdef DEBUG + printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); +#endif + + ioack = inb(ioaddr + EREG_TXACK); + if (((ioack & panelp->ackmask) != 0) || + ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { + printk("STALLION: bad TX interrupt ack value=%x\n", ioack); + return; + } + portp = panelp->ports[(ioack >> 3)]; + +/* + * Unfortunately we need to handle breaks in the data stream, since + * this is the only way to generate them on the cd1400. Do it now if + * a break is to be sent. + */ + if (portp->brklen != 0) + if (stl_cd1400breakisr(portp, ioaddr)) + goto stl_txalldone; + + head = portp->tx.head; + tail = portp->tx.tail; + len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); + if ((len == 0) || ((len < STL_TXBUFLOW) && + (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { + set_bit(ASYI_TXLOW, &portp->istate); + schedule_work(&portp->tqueue); + } + + if (len == 0) { + outb((SRER + portp->uartaddr), ioaddr); + srer = inb(ioaddr + EREG_DATA); + if (srer & SRER_TXDATA) { + srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; + } else { + srer &= ~(SRER_TXDATA | SRER_TXEMPTY); + clear_bit(ASYI_TXBUSY, &portp->istate); + } + outb(srer, (ioaddr + EREG_DATA)); + } else { + len = MIN(len, CD1400_TXFIFOSIZE); + portp->stats.txtotal += len; + stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); + outb((TDR + portp->uartaddr), ioaddr); + outsb((ioaddr + EREG_DATA), tail, stlen); + len -= stlen; + tail += stlen; + if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) + tail = portp->tx.buf; + if (len > 0) { + outsb((ioaddr + EREG_DATA), tail, len); + tail += len; + } + portp->tx.tail = tail; + } + +stl_txalldone: + outb((EOSRR + portp->uartaddr), ioaddr); + outb(0, (ioaddr + EREG_DATA)); +} + +/*****************************************************************************/ + +/* + * Receive character interrupt handler. Determine if we have good chars + * or bad chars and then process appropriately. Good chars are easy + * just shove the lot into the RX buffer and set all status byte to 0. + * If a bad RX char then process as required. This routine needs to be + * fast! In practice it is possible that we get an interrupt on a port + * that is closed. This can happen on hangups - since they completely + * shutdown a port not in user context. Need to handle this case. + */ + +static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr) +{ + stlport_t *portp; + struct tty_struct *tty; + unsigned int ioack, len, buflen; + unsigned char status; + char ch; + +#ifdef DEBUG + printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); +#endif + + ioack = inb(ioaddr + EREG_RXACK); + if ((ioack & panelp->ackmask) != 0) { + printk("STALLION: bad RX interrupt ack value=%x\n", ioack); + return; + } + portp = panelp->ports[(ioack >> 3)]; + tty = portp->tty; + + if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { + outb((RDCR + portp->uartaddr), ioaddr); + len = inb(ioaddr + EREG_DATA); + if ((tty == (struct tty_struct *) NULL) || + (tty->flip.char_buf_ptr == (char *) NULL) || + ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { + len = MIN(len, sizeof(stl_unwanted)); + outb((RDSR + portp->uartaddr), ioaddr); + insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); + portp->stats.rxlost += len; + portp->stats.rxtotal += len; + } else { + len = MIN(len, buflen); + if (len > 0) { + outb((RDSR + portp->uartaddr), ioaddr); + insb((ioaddr + EREG_DATA), tty->flip.char_buf_ptr, len); + memset(tty->flip.flag_buf_ptr, 0, len); + tty->flip.flag_buf_ptr += len; + tty->flip.char_buf_ptr += len; + tty->flip.count += len; + tty_schedule_flip(tty); + portp->stats.rxtotal += len; + } + } + } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { + outb((RDSR + portp->uartaddr), ioaddr); + status = inb(ioaddr + EREG_DATA); + ch = inb(ioaddr + EREG_DATA); + if (status & ST_PARITY) + portp->stats.rxparity++; + if (status & ST_FRAMING) + portp->stats.rxframing++; + if (status & ST_OVERRUN) + portp->stats.rxoverrun++; + if (status & ST_BREAK) + portp->stats.rxbreaks++; + if (status & ST_SCHARMASK) { + if ((status & ST_SCHARMASK) == ST_SCHAR1) + portp->stats.txxon++; + if ((status & ST_SCHARMASK) == ST_SCHAR2) + portp->stats.txxoff++; + goto stl_rxalldone; + } + if ((tty != (struct tty_struct *) NULL) && + ((portp->rxignoremsk & status) == 0)) { + if (portp->rxmarkmsk & status) { + if (status & ST_BREAK) { + status = TTY_BREAK; + if (portp->flags & ASYNC_SAK) { + do_SAK(tty); + BRDENABLE(portp->brdnr, portp->pagenr); + } + } else if (status & ST_PARITY) { + status = TTY_PARITY; + } else if (status & ST_FRAMING) { + status = TTY_FRAME; + } else if(status & ST_OVERRUN) { + status = TTY_OVERRUN; + } else { + status = 0; + } + } else { + status = 0; + } + if (tty->flip.char_buf_ptr != (char *) NULL) { + if (tty->flip.count < TTY_FLIPBUF_SIZE) { + *tty->flip.flag_buf_ptr++ = status; + *tty->flip.char_buf_ptr++ = ch; + tty->flip.count++; + } + tty_schedule_flip(tty); + } + } + } else { + printk("STALLION: bad RX interrupt ack value=%x\n", ioack); + return; + } + +stl_rxalldone: + outb((EOSRR + portp->uartaddr), ioaddr); + outb(0, (ioaddr + EREG_DATA)); +} + +/*****************************************************************************/ + +/* + * Modem interrupt handler. The is called when the modem signal line + * (DCD) has changed state. Leave most of the work to the off-level + * processing routine. + */ + +static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr) +{ + stlport_t *portp; + unsigned int ioack; + unsigned char misr; + +#ifdef DEBUG + printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp); +#endif + + ioack = inb(ioaddr + EREG_MDACK); + if (((ioack & panelp->ackmask) != 0) || + ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { + printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); + return; + } + portp = panelp->ports[(ioack >> 3)]; + + outb((MISR + portp->uartaddr), ioaddr); + misr = inb(ioaddr + EREG_DATA); + if (misr & MISR_DCD) { + set_bit(ASYI_DCDCHANGE, &portp->istate); + schedule_work(&portp->tqueue); + portp->stats.modem++; + } + + outb((EOSRR + portp->uartaddr), ioaddr); + outb(0, (ioaddr + EREG_DATA)); +} + +/*****************************************************************************/ +/* SC26198 HARDWARE FUNCTIONS */ +/*****************************************************************************/ + +/* + * These functions get/set/update the registers of the sc26198 UARTs. + * Access to the sc26198 registers is via an address/data io port pair. + * (Maybe should make this inline...) + */ + +static int stl_sc26198getreg(stlport_t *portp, int regnr) +{ + outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); + return(inb(portp->ioaddr + XP_DATA)); +} + +static void stl_sc26198setreg(stlport_t *portp, int regnr, int value) +{ + outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); + outb(value, (portp->ioaddr + XP_DATA)); +} + +static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value) +{ + outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); + if (inb(portp->ioaddr + XP_DATA) != value) { + outb(value, (portp->ioaddr + XP_DATA)); + return(1); + } + return(0); +} + +/*****************************************************************************/ + +/* + * Functions to get and set the sc26198 global registers. + */ + +static int stl_sc26198getglobreg(stlport_t *portp, int regnr) +{ + outb(regnr, (portp->ioaddr + XP_ADDR)); + return(inb(portp->ioaddr + XP_DATA)); +} + +#if 0 +static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value) +{ + outb(regnr, (portp->ioaddr + XP_ADDR)); + outb(value, (portp->ioaddr + XP_DATA)); +} +#endif + +/*****************************************************************************/ + +/* + * Inbitialize the UARTs in a panel. We don't care what sort of board + * these ports are on - since the port io registers are almost + * identical when dealing with ports. + */ + +static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp) +{ + int chipmask, i; + int nrchips, ioaddr; + +#ifdef DEBUG + printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n", + (int) brdp, (int) panelp); +#endif + + BRDENABLE(panelp->brdnr, panelp->pagenr); + +/* + * Check that each chip is present and started up OK. + */ + chipmask = 0; + nrchips = (panelp->nrports + 4) / SC26198_PORTS; + if (brdp->brdtype == BRD_ECHPCI) + outb(panelp->pagenr, brdp->ioctrl); + + for (i = 0; (i < nrchips); i++) { + ioaddr = panelp->iobase + (i * 4); + outb(SCCR, (ioaddr + XP_ADDR)); + outb(CR_RESETALL, (ioaddr + XP_DATA)); + outb(TSTR, (ioaddr + XP_ADDR)); + if (inb(ioaddr + XP_DATA) != 0) { + printk("STALLION: sc26198 not responding, " + "brd=%d panel=%d chip=%d\n", + panelp->brdnr, panelp->panelnr, i); + continue; + } + chipmask |= (0x1 << i); + outb(GCCR, (ioaddr + XP_ADDR)); + outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); + outb(WDTRCR, (ioaddr + XP_ADDR)); + outb(0xff, (ioaddr + XP_DATA)); + } + + BRDDISABLE(panelp->brdnr); + return(chipmask); +} + +/*****************************************************************************/ + +/* + * Initialize hardware specific port registers. + */ + +static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) +{ +#ifdef DEBUG + printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n", + (int) brdp, (int) panelp, (int) portp); +#endif + + if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || + (portp == (stlport_t *) NULL)) + return; + + portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); + portp->uartaddr = (portp->portnr & 0x07) << 4; + portp->pagenr = panelp->pagenr; + portp->hwid = 0x1; + + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); + BRDDISABLE(portp->brdnr); +} + +/*****************************************************************************/ + +/* + * Set up the sc26198 registers for a port based on the termios port + * settings. + */ + +static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp) +{ + stlbrd_t *brdp; + unsigned long flags; + unsigned int baudrate; + unsigned char mr0, mr1, mr2, clk; + unsigned char imron, imroff, iopr, ipr; + + mr0 = 0; + mr1 = 0; + mr2 = 0; + clk = 0; + iopr = 0; + imron = 0; + imroff = 0; + + brdp = stl_brds[portp->brdnr]; + if (brdp == (stlbrd_t *) NULL) + return; + +/* + * Set up the RX char ignore mask with those RX error types we + * can ignore. + */ + portp->rxignoremsk = 0; + if (tiosp->c_iflag & IGNPAR) + portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | + SR_RXOVERRUN); + if (tiosp->c_iflag & IGNBRK) + portp->rxignoremsk |= SR_RXBREAK; + + portp->rxmarkmsk = SR_RXOVERRUN; + if (tiosp->c_iflag & (INPCK | PARMRK)) + portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); + if (tiosp->c_iflag & BRKINT) + portp->rxmarkmsk |= SR_RXBREAK; + +/* + * Go through the char size, parity and stop bits and set all the + * option register appropriately. + */ + switch (tiosp->c_cflag & CSIZE) { + case CS5: + mr1 |= MR1_CS5; + break; + case CS6: + mr1 |= MR1_CS6; + break; + case CS7: + mr1 |= MR1_CS7; + break; + default: + mr1 |= MR1_CS8; + break; + } + + if (tiosp->c_cflag & CSTOPB) + mr2 |= MR2_STOP2; + else + mr2 |= MR2_STOP1; + + if (tiosp->c_cflag & PARENB) { + if (tiosp->c_cflag & PARODD) + mr1 |= (MR1_PARENB | MR1_PARODD); + else + mr1 |= (MR1_PARENB | MR1_PAREVEN); + } else { + mr1 |= MR1_PARNONE; + } + + mr1 |= MR1_ERRBLOCK; + +/* + * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing + * space for hardware flow control and the like. This should be set to + * VMIN. + */ + mr2 |= MR2_RXFIFOHALF; + +/* + * Calculate the baud rate timers. For now we will just assume that + * the input and output baud are the same. The sc26198 has a fixed + * baud rate table, so only discrete baud rates possible. + */ + baudrate = tiosp->c_cflag & CBAUD; + if (baudrate & CBAUDEX) { + baudrate &= ~CBAUDEX; + if ((baudrate < 1) || (baudrate > 4)) + tiosp->c_cflag &= ~CBAUDEX; + else + baudrate += 15; + } + baudrate = stl_baudrates[baudrate]; + if ((tiosp->c_cflag & CBAUD) == B38400) { + if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + baudrate = 57600; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + baudrate = 115200; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) + baudrate = 230400; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) + baudrate = 460800; + else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) + baudrate = (portp->baud_base / portp->custom_divisor); + } + if (baudrate > STL_SC26198MAXBAUD) + baudrate = STL_SC26198MAXBAUD; + + if (baudrate > 0) { + for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { + if (baudrate <= sc26198_baudtable[clk]) + break; + } + } + +/* + * Check what form of modem signaling is required and set it up. + */ + if (tiosp->c_cflag & CLOCAL) { + portp->flags &= ~ASYNC_CHECK_CD; + } else { + iopr |= IOPR_DCDCOS; + imron |= IR_IOPORT; + portp->flags |= ASYNC_CHECK_CD; + } + +/* + * Setup sc26198 enhanced modes if we can. In particular we want to + * handle as much of the flow control as possible automatically. As + * well as saving a few CPU cycles it will also greatly improve flow + * control reliability. + */ + if (tiosp->c_iflag & IXON) { + mr0 |= MR0_SWFTX | MR0_SWFT; + imron |= IR_XONXOFF; + } else { + imroff |= IR_XONXOFF; + } + if (tiosp->c_iflag & IXOFF) + mr0 |= MR0_SWFRX; + + if (tiosp->c_cflag & CRTSCTS) { + mr2 |= MR2_AUTOCTS; + mr1 |= MR1_AUTORTS; + } + +/* + * All sc26198 register values calculated so go through and set + * them all up. + */ + +#ifdef DEBUG + printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", + portp->portnr, portp->panelnr, portp->brdnr); + printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); + printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); + printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", + tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], + tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, IMR, 0); + stl_sc26198updatereg(portp, MR0, mr0); + stl_sc26198updatereg(portp, MR1, mr1); + stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); + stl_sc26198updatereg(portp, MR2, mr2); + stl_sc26198updatereg(portp, IOPIOR, + ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); + + if (baudrate > 0) { + stl_sc26198setreg(portp, TXCSR, clk); + stl_sc26198setreg(portp, RXCSR, clk); + } + + stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); + stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); + + ipr = stl_sc26198getreg(portp, IPR); + if (ipr & IPR_DCD) + portp->sigs &= ~TIOCM_CD; + else + portp->sigs |= TIOCM_CD; + + portp->imr = (portp->imr & ~imroff) | imron; + stl_sc26198setreg(portp, IMR, portp->imr); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Set the state of the DTR and RTS signals. + */ + +static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts) +{ + unsigned char iopioron, iopioroff; + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n", + (int) portp, dtr, rts); +#endif + + iopioron = 0; + iopioroff = 0; + if (dtr == 0) + iopioroff |= IPR_DTR; + else if (dtr > 0) + iopioron |= IPR_DTR; + if (rts == 0) + iopioroff |= IPR_RTS; + else if (rts > 0) + iopioron |= IPR_RTS; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, IOPIOR, + ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Return the state of the signals. + */ + +static int stl_sc26198getsignals(stlport_t *portp) +{ + unsigned char ipr; + unsigned long flags; + int sigs; + +#ifdef DEBUG + printk("stl_sc26198getsignals(portp=%x)\n", (int) portp); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + ipr = stl_sc26198getreg(portp, IPR); + BRDDISABLE(portp->brdnr); + restore_flags(flags); + + sigs = 0; + sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; + sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; + sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; + sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; + sigs |= TIOCM_DSR; + return(sigs); +} + +/*****************************************************************************/ + +/* + * Enable/Disable the Transmitter and/or Receiver. + */ + +static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx) +{ + unsigned char ccr; + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n", + (int) portp, rx, tx); +#endif + + ccr = portp->crenable; + if (tx == 0) + ccr &= ~CR_TXENABLE; + else if (tx > 0) + ccr |= CR_TXENABLE; + if (rx == 0) + ccr &= ~CR_RXENABLE; + else if (rx > 0) + ccr |= CR_RXENABLE; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, SCCR, ccr); + BRDDISABLE(portp->brdnr); + portp->crenable = ccr; + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Start/stop the Transmitter and/or Receiver. + */ + +static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx) +{ + unsigned char imr; + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n", + (int) portp, rx, tx); +#endif + + imr = portp->imr; + if (tx == 0) + imr &= ~IR_TXRDY; + else if (tx == 1) + imr |= IR_TXRDY; + if (rx == 0) + imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); + else if (rx > 0) + imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, IMR, imr); + BRDDISABLE(portp->brdnr); + portp->imr = imr; + if (tx > 0) + set_bit(ASYI_TXBUSY, &portp->istate); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Disable all interrupts from this port. + */ + +static void stl_sc26198disableintrs(stlport_t *portp) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + portp->imr = 0; + stl_sc26198setreg(portp, IMR, 0); + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +static void stl_sc26198sendbreak(stlport_t *portp, int len) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len); +#endif + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + if (len == 1) { + stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); + portp->stats.txbreaks++; + } else { + stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); + } + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Take flow control actions... + */ + +static void stl_sc26198flowctrl(stlport_t *portp, int state) +{ + struct tty_struct *tty; + unsigned long flags; + unsigned char mr0; + +#ifdef DEBUG + printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state); +#endif + + if (portp == (stlport_t *) NULL) + return; + tty = portp->tty; + if (tty == (struct tty_struct *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + + if (state) { + if (tty->termios->c_iflag & IXOFF) { + mr0 = stl_sc26198getreg(portp, MR0); + stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); + stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); + mr0 |= MR0_SWFRX; + portp->stats.rxxon++; + stl_sc26198wait(portp); + stl_sc26198setreg(portp, MR0, mr0); + } +/* + * Question: should we return RTS to what it was before? It may + * have been set by an ioctl... Suppose not, since if you have + * hardware flow control set then it is pretty silly to go and + * set the RTS line by hand. + */ + if (tty->termios->c_cflag & CRTSCTS) { + stl_sc26198setreg(portp, MR1, + (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); + stl_sc26198setreg(portp, IOPIOR, + (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); + portp->stats.rxrtson++; + } + } else { + if (tty->termios->c_iflag & IXOFF) { + mr0 = stl_sc26198getreg(portp, MR0); + stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); + stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); + mr0 &= ~MR0_SWFRX; + portp->stats.rxxoff++; + stl_sc26198wait(portp); + stl_sc26198setreg(portp, MR0, mr0); + } + if (tty->termios->c_cflag & CRTSCTS) { + stl_sc26198setreg(portp, MR1, + (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); + stl_sc26198setreg(portp, IOPIOR, + (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); + portp->stats.rxrtsoff++; + } + } + + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Send a flow control character. + */ + +static void stl_sc26198sendflow(stlport_t *portp, int state) +{ + struct tty_struct *tty; + unsigned long flags; + unsigned char mr0; + +#ifdef DEBUG + printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state); +#endif + + if (portp == (stlport_t *) NULL) + return; + tty = portp->tty; + if (tty == (struct tty_struct *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + if (state) { + mr0 = stl_sc26198getreg(portp, MR0); + stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); + stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); + mr0 |= MR0_SWFRX; + portp->stats.rxxon++; + stl_sc26198wait(portp); + stl_sc26198setreg(portp, MR0, mr0); + } else { + mr0 = stl_sc26198getreg(portp, MR0); + stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); + stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); + mr0 &= ~MR0_SWFRX; + portp->stats.rxxoff++; + stl_sc26198wait(portp); + stl_sc26198setreg(portp, MR0, mr0); + } + BRDDISABLE(portp->brdnr); + restore_flags(flags); +} + +/*****************************************************************************/ + +static void stl_sc26198flush(stlport_t *portp) +{ + unsigned long flags; + +#ifdef DEBUG + printk("stl_sc26198flush(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return; + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + stl_sc26198setreg(portp, SCCR, CR_TXRESET); + stl_sc26198setreg(portp, SCCR, portp->crenable); + BRDDISABLE(portp->brdnr); + portp->tx.tail = portp->tx.head; + restore_flags(flags); +} + +/*****************************************************************************/ + +/* + * Return the current state of data flow on this port. This is only + * really interresting when determining if data has fully completed + * transmission or not... The sc26198 interrupt scheme cannot + * determine when all data has actually drained, so we need to + * check the port statusy register to be sure. + */ + +static int stl_sc26198datastate(stlport_t *portp) +{ + unsigned long flags; + unsigned char sr; + +#ifdef DEBUG + printk("stl_sc26198datastate(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return(0); + if (test_bit(ASYI_TXBUSY, &portp->istate)) + return(1); + + save_flags(flags); + cli(); + BRDENABLE(portp->brdnr, portp->pagenr); + sr = stl_sc26198getreg(portp, SR); + BRDDISABLE(portp->brdnr); + restore_flags(flags); + + return((sr & SR_TXEMPTY) ? 0 : 1); +} + +/*****************************************************************************/ + +/* + * Delay for a small amount of time, to give the sc26198 a chance + * to process a command... + */ + +static void stl_sc26198wait(stlport_t *portp) +{ + int i; + +#ifdef DEBUG + printk("stl_sc26198wait(portp=%x)\n", (int) portp); +#endif + + if (portp == (stlport_t *) NULL) + return; + + for (i = 0; (i < 20); i++) + stl_sc26198getglobreg(portp, TSTR); +} + +/*****************************************************************************/ + +/* + * If we are TX flow controlled and in IXANY mode then we may + * need to unflow control here. We gotta do this because of the + * automatic flow control modes of the sc26198. + */ + +static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty) +{ + unsigned char mr0; + + mr0 = stl_sc26198getreg(portp, MR0); + stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); + stl_sc26198setreg(portp, SCCR, CR_HOSTXON); + stl_sc26198wait(portp); + stl_sc26198setreg(portp, MR0, mr0); + clear_bit(ASYI_TXFLOWED, &portp->istate); +} + +/*****************************************************************************/ + +/* + * Interrupt service routine for sc26198 panels. + */ + +static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase) +{ + stlport_t *portp; + unsigned int iack; + +/* + * Work around bug in sc26198 chip... Cannot have A6 address + * line of UART high, else iack will be returned as 0. + */ + outb(0, (iobase + 1)); + + iack = inb(iobase + XP_IACK); + portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; + + if (iack & IVR_RXDATA) + stl_sc26198rxisr(portp, iack); + else if (iack & IVR_TXDATA) + stl_sc26198txisr(portp); + else + stl_sc26198otherisr(portp, iack); +} + +/*****************************************************************************/ + +/* + * Transmit interrupt handler. This has gotta be fast! Handling TX + * chars is pretty simple, stuff as many as possible from the TX buffer + * into the sc26198 FIFO. + * In practice it is possible that interrupts are enabled but that the + * port has been hung up. Need to handle not having any TX buffer here, + * this is done by using the side effect that head and tail will also + * be NULL if the buffer has been freed. + */ + +static void stl_sc26198txisr(stlport_t *portp) +{ + unsigned int ioaddr; + unsigned char mr0; + int len, stlen; + char *head, *tail; + +#ifdef DEBUG + printk("stl_sc26198txisr(portp=%x)\n", (int) portp); +#endif + + ioaddr = portp->ioaddr; + head = portp->tx.head; + tail = portp->tx.tail; + len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); + if ((len == 0) || ((len < STL_TXBUFLOW) && + (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { + set_bit(ASYI_TXLOW, &portp->istate); + schedule_work(&portp->tqueue); + } + + if (len == 0) { + outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); + mr0 = inb(ioaddr + XP_DATA); + if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { + portp->imr &= ~IR_TXRDY; + outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); + outb(portp->imr, (ioaddr + XP_DATA)); + clear_bit(ASYI_TXBUSY, &portp->istate); + } else { + mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); + outb(mr0, (ioaddr + XP_DATA)); + } + } else { + len = MIN(len, SC26198_TXFIFOSIZE); + portp->stats.txtotal += len; + stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); + outb(GTXFIFO, (ioaddr + XP_ADDR)); + outsb((ioaddr + XP_DATA), tail, stlen); + len -= stlen; + tail += stlen; + if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) + tail = portp->tx.buf; + if (len > 0) { + outsb((ioaddr + XP_DATA), tail, len); + tail += len; + } + portp->tx.tail = tail; + } +} + +/*****************************************************************************/ + +/* + * Receive character interrupt handler. Determine if we have good chars + * or bad chars and then process appropriately. Good chars are easy + * just shove the lot into the RX buffer and set all status byte to 0. + * If a bad RX char then process as required. This routine needs to be + * fast! In practice it is possible that we get an interrupt on a port + * that is closed. This can happen on hangups - since they completely + * shutdown a port not in user context. Need to handle this case. + */ + +static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack) +{ + struct tty_struct *tty; + unsigned int len, buflen, ioaddr; + +#ifdef DEBUG + printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack); +#endif + + tty = portp->tty; + ioaddr = portp->ioaddr; + outb(GIBCR, (ioaddr + XP_ADDR)); + len = inb(ioaddr + XP_DATA) + 1; + + if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { + if ((tty == (struct tty_struct *) NULL) || + (tty->flip.char_buf_ptr == (char *) NULL) || + ((buflen = TTY_FLIPBUF_SIZE - tty->flip.count) == 0)) { + len = MIN(len, sizeof(stl_unwanted)); + outb(GRXFIFO, (ioaddr + XP_ADDR)); + insb((ioaddr + XP_DATA), &stl_unwanted[0], len); + portp->stats.rxlost += len; + portp->stats.rxtotal += len; + } else { + len = MIN(len, buflen); + if (len > 0) { + outb(GRXFIFO, (ioaddr + XP_ADDR)); + insb((ioaddr + XP_DATA), tty->flip.char_buf_ptr, len); + memset(tty->flip.flag_buf_ptr, 0, len); + tty->flip.flag_buf_ptr += len; + tty->flip.char_buf_ptr += len; + tty->flip.count += len; + tty_schedule_flip(tty); + portp->stats.rxtotal += len; + } + } + } else { + stl_sc26198rxbadchars(portp); + } + +/* + * If we are TX flow controlled and in IXANY mode then we may need + * to unflow control here. We gotta do this because of the automatic + * flow control modes of the sc26198. + */ + if (test_bit(ASYI_TXFLOWED, &portp->istate)) { + if ((tty != (struct tty_struct *) NULL) && + (tty->termios != (struct termios *) NULL) && + (tty->termios->c_iflag & IXANY)) { + stl_sc26198txunflow(portp, tty); + } + } +} + +/*****************************************************************************/ + +/* + * Process an RX bad character. + */ + +static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch) +{ + struct tty_struct *tty; + unsigned int ioaddr; + + tty = portp->tty; + ioaddr = portp->ioaddr; + + if (status & SR_RXPARITY) + portp->stats.rxparity++; + if (status & SR_RXFRAMING) + portp->stats.rxframing++; + if (status & SR_RXOVERRUN) + portp->stats.rxoverrun++; + if (status & SR_RXBREAK) + portp->stats.rxbreaks++; + + if ((tty != (struct tty_struct *) NULL) && + ((portp->rxignoremsk & status) == 0)) { + if (portp->rxmarkmsk & status) { + if (status & SR_RXBREAK) { + status = TTY_BREAK; + if (portp->flags & ASYNC_SAK) { + do_SAK(tty); + BRDENABLE(portp->brdnr, portp->pagenr); + } + } else if (status & SR_RXPARITY) { + status = TTY_PARITY; + } else if (status & SR_RXFRAMING) { + status = TTY_FRAME; + } else if(status & SR_RXOVERRUN) { + status = TTY_OVERRUN; + } else { + status = 0; + } + } else { + status = 0; + } + + if (tty->flip.char_buf_ptr != (char *) NULL) { + if (tty->flip.count < TTY_FLIPBUF_SIZE) { + *tty->flip.flag_buf_ptr++ = status; + *tty->flip.char_buf_ptr++ = ch; + tty->flip.count++; + } + tty_schedule_flip(tty); + } + + if (status == 0) + portp->stats.rxtotal++; + } +} + +/*****************************************************************************/ + +/* + * Process all characters in the RX FIFO of the UART. Check all char + * status bytes as well, and process as required. We need to check + * all bytes in the FIFO, in case some more enter the FIFO while we + * are here. To get the exact character error type we need to switch + * into CHAR error mode (that is why we need to make sure we empty + * the FIFO). + */ + +static void stl_sc26198rxbadchars(stlport_t *portp) +{ + unsigned char status, mr1; + char ch; + +/* + * To get the precise error type for each character we must switch + * back into CHAR error mode. + */ + mr1 = stl_sc26198getreg(portp, MR1); + stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); + + while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { + stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); + ch = stl_sc26198getreg(portp, RXFIFO); + stl_sc26198rxbadch(portp, status, ch); + } + +/* + * To get correct interrupt class we must switch back into BLOCK + * error mode. + */ + stl_sc26198setreg(portp, MR1, mr1); +} + +/*****************************************************************************/ + +/* + * Other interrupt handler. This includes modem signals, flow + * control actions, etc. Most stuff is left to off-level interrupt + * processing time. + */ + +static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack) +{ + unsigned char cir, ipr, xisr; + +#ifdef DEBUG + printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack); +#endif + + cir = stl_sc26198getglobreg(portp, CIR); + + switch (cir & CIR_SUBTYPEMASK) { + case CIR_SUBCOS: + ipr = stl_sc26198getreg(portp, IPR); + if (ipr & IPR_DCDCHANGE) { + set_bit(ASYI_DCDCHANGE, &portp->istate); + schedule_work(&portp->tqueue); + portp->stats.modem++; + } + break; + case CIR_SUBXONXOFF: + xisr = stl_sc26198getreg(portp, XISR); + if (xisr & XISR_RXXONGOT) { + set_bit(ASYI_TXFLOWED, &portp->istate); + portp->stats.txxoff++; + } + if (xisr & XISR_RXXOFFGOT) { + clear_bit(ASYI_TXFLOWED, &portp->istate); + portp->stats.txxon++; + } + break; + case CIR_SUBBREAK: + stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); + stl_sc26198rxbadchars(portp); + break; + default: + break; + } +} + +/*****************************************************************************/ |