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Diffstat (limited to 'drivers/char/stallion.c')
| -rw-r--r-- | drivers/char/stallion.c | 4652 |
1 files changed, 0 insertions, 4652 deletions
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c deleted file mode 100644 index 461a5a045517..000000000000 --- a/drivers/char/stallion.c +++ /dev/null @@ -1,4652 +0,0 @@ -/*****************************************************************************/ - -/* - * 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/module.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/seq_file.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/device.h> -#include <linux/delay.h> -#include <linux/ctype.h> - -#include <asm/io.h> -#include <asm/uaccess.h> - -#include <linux/pci.h> - -/*****************************************************************************/ - -/* - * 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 - -struct stlconf { - unsigned int brdtype; - int ioaddr1; - int ioaddr2; - unsigned long memaddr; - int irq; - int irqtype; -}; - -static unsigned int stl_nrbrds; - -/*****************************************************************************/ - -/* - * 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; - -/* - * 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 ktermios stl_deftermios = { - .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), - .c_cc = INIT_C_CC, - .c_ispeed = 9600, - .c_ospeed = 9600, -}; - -/* - * Define global place to put buffer overflow characters. - */ -static char stl_unwanted[SC26198_RXFIFOSIZE]; - -/*****************************************************************************/ - -static DEFINE_MUTEX(stl_brdslock); -static struct stlbrd *stl_brds[STL_MAXBRDS]; - -static const struct tty_port_operations stl_port_ops; - -/* - * Per board state flags. Used with the state field of the board struct. - * Not really much here! - */ -#define BRD_FOUND 0x1 -#define STL_PROBED 0x2 - - -/* - * 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_TXFLOWED 3 - -/* - * Define an array of board names as printable strings. Handy for - * referencing boards when printing trace and stuff. - */ -static char *stl_brdnames[] = { - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - NULL, - "EasyIO", - "EC8/32-AT", - "EC8/32-MC", - NULL, - NULL, - 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 unsigned int stl_nargs; -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. - */ - -static struct { - char *name; - int type; -} 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_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 -}; - -/* - * Lock ordering is that you may not take stallion_lock holding - * brd_lock. - */ - -static spinlock_t brd_lock; /* Guard the board mapping */ -static spinlock_t stallion_lock; /* Guard the tty driver */ - -/* - * 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) - -/*****************************************************************************/ - -/* - * 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. - */ - -static struct pci_device_id stl_pcibrds[] = { - { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864), - .driver_data = BRD_ECH64PCI }, - { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI), - .driver_data = BRD_EASYIOPCI }, - { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832), - .driver_data = BRD_ECHPCI }, - { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410), - .driver_data = BRD_ECHPCI }, - { } -}; -MODULE_DEVICE_TABLE(pci, stl_pcibrds); - -/*****************************************************************************/ - -/* - * 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 -}; - -/*****************************************************************************/ - -/* - * Declare all those functions in this driver! - */ - -static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg); -static int stl_brdinit(struct stlbrd *brdp); -static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp); -static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); - -/* - * CD1400 uart specific handling functions. - */ -static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); -static int stl_cd1400getreg(struct stlport *portp, int regnr); -static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); -static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); -static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); -static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); -static int stl_cd1400getsignals(struct stlport *portp); -static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); -static void stl_cd1400ccrwait(struct stlport *portp); -static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); -static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); -static void stl_cd1400disableintrs(struct stlport *portp); -static void stl_cd1400sendbreak(struct stlport *portp, int len); -static void stl_cd1400flowctrl(struct stlport *portp, int state); -static void stl_cd1400sendflow(struct stlport *portp, int state); -static void stl_cd1400flush(struct stlport *portp); -static int stl_cd1400datastate(struct stlport *portp); -static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); -static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); -static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); -static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); -static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); - -static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); - -/* - * SC26198 uart specific handling functions. - */ -static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); -static int stl_sc26198getreg(struct stlport *portp, int regnr); -static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); -static int stl_sc26198getglobreg(struct stlport *portp, int regnr); -static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); -static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); -static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); -static int stl_sc26198getsignals(struct stlport *portp); -static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); -static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); -static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); -static void stl_sc26198disableintrs(struct stlport *portp); -static void stl_sc26198sendbreak(struct stlport *portp, int len); -static void stl_sc26198flowctrl(struct stlport *portp, int state); -static void stl_sc26198sendflow(struct stlport *portp, int state); -static void stl_sc26198flush(struct stlport *portp); -static int stl_sc26198datastate(struct stlport *portp); -static void stl_sc26198wait(struct stlport *portp); -static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); -static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); -static void stl_sc26198txisr(struct stlport *port); -static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); -static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); -static void stl_sc26198rxbadchars(struct stlport *portp); -static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); - -/*****************************************************************************/ - -/* - * Generic UART support structure. - */ -typedef struct uart { - int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); - void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); - void (*setport)(struct stlport *portp, struct ktermios *tiosp); - int (*getsignals)(struct stlport *portp); - void (*setsignals)(struct stlport *portp, int dtr, int rts); - void (*enablerxtx)(struct stlport *portp, int rx, int tx); - void (*startrxtx)(struct stlport *portp, int rx, int tx); - void (*disableintrs)(struct stlport *portp); - void (*sendbreak)(struct stlport *portp, int len); - void (*flowctrl)(struct stlport *portp, int state); - void (*sendflow)(struct stlport *portp, int state); - void (*flush)(struct stlport *portp); - int (*datastate)(struct stlport *portp); - void (*intr)(struct stlpanel *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 ARRAY_SIZE(sc26198_baudtable) - -/*****************************************************************************/ - -/* - * 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 const struct file_operations stl_fsiomem = { - .owner = THIS_MODULE, - .unlocked_ioctl = stl_memioctl, - .llseek = noop_llseek, -}; - -static struct class *stallion_class; - -static void stl_cd_change(struct stlport *portp) -{ - unsigned int oldsigs = portp->sigs; - struct tty_struct *tty = tty_port_tty_get(&portp->port); - - if (!tty) - return; - - portp->sigs = stl_getsignals(portp); - - if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) - wake_up_interruptible(&portp->port.open_wait); - - if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) - if (portp->port.flags & ASYNC_CHECK_CD) - tty_hangup(tty); - tty_kref_put(tty); -} - -/* - * Check for any arguments passed in on the module load command line. - */ - -/*****************************************************************************/ - -/* - * Parse the supplied argument string, into the board conf struct. - */ - -static int __init stl_parsebrd(struct stlconf *confp, char **argp) -{ - char *sp; - unsigned int i; - - pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); - - if ((argp[0] == NULL) || (*argp[0] == 0)) - return 0; - - for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++) - *sp = tolower(*sp); - - for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) - if (strcmp(stl_brdstr[i].name, argp[0]) == 0) - break; - - if (i == ARRAY_SIZE(stl_brdstr)) { - printk("STALLION: unknown board name, %s?\n", argp[0]); - return 0; - } - - confp->brdtype = stl_brdstr[i].type; - - i = 1; - if ((argp[i] != NULL) && (*argp[i] != 0)) - confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0); - i++; - if (confp->brdtype == BRD_ECH) { - if ((argp[i] != NULL) && (*argp[i] != 0)) - confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0); - i++; - } - if ((argp[i] != NULL) && (*argp[i] != 0)) - confp->irq = simple_strtoul(argp[i], NULL, 0); - return 1; -} - -/*****************************************************************************/ - -/* - * Allocate a new board structure. Fill out the basic info in it. - */ - -static struct stlbrd *stl_allocbrd(void) -{ - struct stlbrd *brdp; - - brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); - if (!brdp) { - printk("STALLION: failed to allocate memory (size=%Zd)\n", - sizeof(struct stlbrd)); - return NULL; - } - - brdp->magic = STL_BOARDMAGIC; - return brdp; -} - -/*****************************************************************************/ - -static int stl_activate(struct tty_port *port, struct tty_struct *tty) -{ - struct stlport *portp = container_of(port, struct stlport, port); - if (!portp->tx.buf) { - portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); - if (!portp->tx.buf) - 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); - return 0; -} - -static int stl_open(struct tty_struct *tty, struct file *filp) -{ - struct stlport *portp; - struct stlbrd *brdp; - unsigned int minordev, brdnr, panelnr; - int portnr; - - pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name); - - minordev = tty->index; - brdnr = MINOR2BRD(minordev); - if (brdnr >= stl_nrbrds) - return -ENODEV; - brdp = stl_brds[brdnr]; - if (brdp == NULL) - return -ENODEV; - - minordev = MINOR2PORT(minordev); - for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) { - if (brdp->panels[panelnr] == 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 == NULL) - return -ENODEV; - - tty->driver_data = portp; - return tty_port_open(&portp->port, tty, filp); - -} - -/*****************************************************************************/ - -static int stl_carrier_raised(struct tty_port *port) -{ - struct stlport *portp = container_of(port, struct stlport, port); - return (portp->sigs & TIOCM_CD) ? 1 : 0; -} - -static void stl_dtr_rts(struct tty_port *port, int on) -{ - struct stlport *portp = container_of(port, struct stlport, port); - /* Takes brd_lock internally */ - stl_setsignals(portp, on, on); -} - -/*****************************************************************************/ - -static void stl_flushbuffer(struct tty_struct *tty) -{ - struct stlport *portp; - - pr_debug("stl_flushbuffer(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return; - - stl_flush(portp); - tty_wakeup(tty); -} - -/*****************************************************************************/ - -static void stl_waituntilsent(struct tty_struct *tty, int timeout) -{ - struct stlport *portp; - unsigned long tend; - - pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); - - portp = tty->driver_data; - if (portp == 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_shutdown(struct tty_port *port) -{ - struct stlport *portp = container_of(port, struct stlport, port); - stl_disableintrs(portp); - stl_enablerxtx(portp, 0, 0); - stl_flush(portp); - portp->istate = 0; - if (portp->tx.buf != NULL) { - kfree(portp->tx.buf); - portp->tx.buf = NULL; - portp->tx.head = NULL; - portp->tx.tail = NULL; - } -} - -static void stl_close(struct tty_struct *tty, struct file *filp) -{ - struct stlport*portp; - pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); - - portp = tty->driver_data; - if(portp == NULL) - return; - tty_port_close(&portp->port, tty, filp); -} - -/*****************************************************************************/ - -/* - * 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) -{ - struct stlport *portp; - unsigned int len, stlen; - unsigned char *chbuf; - char *head, *tail; - - pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count); - - portp = tty->driver_data; - if (portp == NULL) - return 0; - if (portp->tx.buf == 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, (unsigned int)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 int stl_putchar(struct tty_struct *tty, unsigned char ch) -{ - struct stlport *portp; - unsigned int len; - char *head, *tail; - - pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); - - portp = tty->driver_data; - if (portp == NULL) - return -EINVAL; - if (portp->tx.buf == NULL) - return -EINVAL; - - 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; - return 0; -} - -/*****************************************************************************/ - -/* - * 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) -{ - struct stlport *portp; - - pr_debug("stl_flushchars(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return; - if (portp->tx.buf == NULL) - return; - - stl_startrxtx(portp, -1, 1); -} - -/*****************************************************************************/ - -static int stl_writeroom(struct tty_struct *tty) -{ - struct stlport *portp; - char *head, *tail; - - pr_debug("stl_writeroom(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return 0; - if (portp->tx.buf == 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) -{ - struct stlport *portp; - unsigned int size; - char *head, *tail; - - pr_debug("stl_charsinbuffer(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return 0; - if (portp->tx.buf == 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(struct stlport *portp, struct serial_struct __user *sp) -{ - struct serial_struct sio; - struct stlbrd *brdp; - - pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); - - memset(&sio, 0, sizeof(struct serial_struct)); - - mutex_lock(&portp->port.mutex); - sio.line = portp->portnr; - sio.port = portp->ioaddr; - sio.flags = portp->port.flags; - sio.baud_base = portp->baud_base; - sio.close_delay = portp->close_delay; - sio.closing_wait = portp->closing_wait; - sio.custom_divisor = portp->custom_divisor; - sio.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 != NULL) - sio.irq = brdp->irq; - mutex_unlock(&portp->port.mutex); - - 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(struct tty_struct *tty, struct serial_struct __user *sp) -{ - struct stlport * portp = tty->driver_data; - struct serial_struct sio; - - pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); - - if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) - return -EFAULT; - mutex_lock(&portp->port.mutex); - if (!capable(CAP_SYS_ADMIN)) { - if ((sio.baud_base != portp->baud_base) || - (sio.close_delay != portp->close_delay) || - ((sio.flags & ~ASYNC_USR_MASK) != - (portp->port.flags & ~ASYNC_USR_MASK))) { - mutex_unlock(&portp->port.mutex); - return -EPERM; - } - } - - portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) | - (sio.flags & ASYNC_USR_MASK); - portp->baud_base = sio.baud_base; - portp->close_delay = sio.close_delay; - portp->closing_wait = sio.closing_wait; - portp->custom_divisor = sio.custom_divisor; - mutex_unlock(&portp->port.mutex); - stl_setport(portp, tty->termios); - return 0; -} - -/*****************************************************************************/ - -static int stl_tiocmget(struct tty_struct *tty, struct file *file) -{ - struct stlport *portp; - - portp = tty->driver_data; - if (portp == 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) -{ - struct stlport *portp; - int rts = -1, dtr = -1; - - portp = tty->driver_data; - if (portp == 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) -{ - struct stlport *portp; - int rc; - void __user *argp = (void __user *)arg; - - pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, - arg); - - portp = tty->driver_data; - if (portp == 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 TIOCGSERIAL: - rc = stl_getserial(portp, argp); - break; - case TIOCSSERIAL: - rc = stl_setserial(tty, argp); - break; - case COM_GETPORTSTATS: - rc = stl_getportstats(tty, 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; -} - -/*****************************************************************************/ - -/* - * Start the transmitter again. Just turn TX interrupts back on. - */ - -static void stl_start(struct tty_struct *tty) -{ - struct stlport *portp; - - pr_debug("stl_start(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return; - stl_startrxtx(portp, -1, 1); -} - -/*****************************************************************************/ - -static void stl_settermios(struct tty_struct *tty, struct ktermios *old) -{ - struct stlport *portp; - struct ktermios *tiosp; - - pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); - - portp = tty->driver_data; - if (portp == 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->port.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) -{ - struct stlport *portp; - - pr_debug("stl_throttle(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return; - stl_flowctrl(portp, 0); -} - -/*****************************************************************************/ - -/* - * Unflow control the device sending us data... - */ - -static void stl_unthrottle(struct tty_struct *tty) -{ - struct stlport *portp; - - pr_debug("stl_unthrottle(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == 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) -{ - struct stlport *portp; - - pr_debug("stl_stop(tty=%p)\n", tty); - - portp = tty->driver_data; - if (portp == NULL) - return; - stl_startrxtx(portp, -1, 0); -} - -/*****************************************************************************/ - -/* - * 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) -{ - struct stlport *portp = tty->driver_data; - pr_debug("stl_hangup(tty=%p)\n", tty); - - if (portp == NULL) - return; - tty_port_hangup(&portp->port); -} - -/*****************************************************************************/ - -static int stl_breakctl(struct tty_struct *tty, int state) -{ - struct stlport *portp; - - pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); - - portp = tty->driver_data; - if (portp == NULL) - return -EINVAL; - - stl_sendbreak(portp, ((state == -1) ? 1 : 2)); - return 0; -} - -/*****************************************************************************/ - -static void stl_sendxchar(struct tty_struct *tty, char ch) -{ - struct stlport *portp; - - pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); - - portp = tty->driver_data; - if (portp == 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); -} - -static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr) -{ - int sigs; - char sep; - - seq_printf(m, "%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) - seq_printf(m, " fe:%d", (int) portp->stats.rxframing); - if (portp->stats.rxparity) - seq_printf(m, " pe:%d", (int) portp->stats.rxparity); - if (portp->stats.rxbreaks) - seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks); - if (portp->stats.rxoverrun) - seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun); - - sigs = stl_getsignals(portp); - sep = ' '; - if (sigs & TIOCM_RTS) { - seq_printf(m, "%c%s", sep, "RTS"); - sep = '|'; - } - if (sigs & TIOCM_CTS) { - seq_printf(m, "%c%s", sep, "CTS"); - sep = '|'; - } - if (sigs & TIOCM_DTR) { - seq_printf(m, "%c%s", sep, "DTR"); - sep = '|'; - } - if (sigs & TIOCM_CD) { - seq_printf(m, "%c%s", sep, "DCD"); - sep = '|'; - } - if (sigs & TIOCM_DSR) { - seq_printf(m, "%c%s", sep, "DSR"); - sep = '|'; - } - seq_putc(m, '\n'); -} - -/*****************************************************************************/ - -/* - * Port info, read from the /proc file system. - */ - -static int stl_proc_show(struct seq_file *m, void *v) -{ - struct stlbrd *brdp; - struct stlpanel *panelp; - struct stlport *portp; - unsigned int brdnr, panelnr, portnr; - int totalport; - - totalport = 0; - - seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion); - -/* - * 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 == NULL) - continue; - if (brdp->state == 0) - continue; - - totalport = brdnr * STL_MAXPORTS; - for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) { - panelp = brdp->panels[panelnr]; - if (panelp == NULL) - continue; - - for (portnr = 0; portnr < panelp->nrports; portnr++, - totalport++) { - portp = panelp->ports[portnr]; - if (portp == NULL) - continue; - stl_portinfo(m, portp, totalport); - } - } - } - return 0; -} - -static int stl_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, stl_proc_show, NULL); -} - -static const struct file_operations stl_proc_fops = { - .owner = THIS_MODULE, - .open = stl_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/*****************************************************************************/ - -/* - * 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 stlbrd *brdp = dev_id; - - pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq); - - return IRQ_RETVAL((* brdp->isr)(brdp)); -} - -/*****************************************************************************/ - -/* - * Interrupt service routine for EasyIO board types. - */ - -static int stl_eiointr(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int iobase; - int handled = 0; - - spin_lock(&brd_lock); - panelp = brdp->panels[0]; - iobase = panelp->iobase; - while (inb(brdp->iostatus) & EIO_INTRPEND) { - handled = 1; - (* panelp->isr)(panelp, iobase); - } - spin_unlock(&brd_lock); - return handled; -} - -/*****************************************************************************/ - -/* - * Interrupt service routine for ECH-AT board types. - */ - -static int stl_echatintr(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int ioaddr, 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(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int ioaddr, 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(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int ioaddr, 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(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int ioaddr, 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; -} - -/*****************************************************************************/ - -/* - * Initialize all the ports on a panel. - */ - -static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) -{ - struct stlport *portp; - unsigned int i; - int chipmask; - - pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); - - 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 = kzalloc(sizeof(struct stlport), GFP_KERNEL); - if (!portp) { - printk("STALLION: failed to allocate memory " - "(size=%Zd)\n", sizeof(struct stlport)); - break; - } - tty_port_init(&portp->port); - portp->port.ops = &stl_port_ops; - 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_waitqueue_head(&portp->port.open_wait); - init_waitqueue_head(&portp->port.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; -} - -static void stl_cleanup_panels(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - struct stlport *portp; - unsigned int j, k; - struct tty_struct *tty; - - for (j = 0; j < STL_MAXPANELS; j++) { - panelp = brdp->panels[j]; - if (panelp == NULL) - continue; - for (k = 0; k < STL_PORTSPERPANEL; k++) { - portp = panelp->ports[k]; - if (portp == NULL) - continue; - tty = tty_port_tty_get(&portp->port); - if (tty != NULL) { - stl_hangup(tty); - tty_kref_put(tty); - } - kfree(portp->tx.buf); - kfree(portp); - } - kfree(panelp); - } -} - -/*****************************************************************************/ - -/* - * Try to find and initialize an EasyIO board. - */ - -static int __devinit stl_initeio(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int status; - char *name; - int retval; - - pr_debug("stl_initeio(brdp=%p)\n", brdp); - - 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); - retval = -EINVAL; - goto err; - } - outb((stl_vecmap[brdp->irq] | EIO_0WS | - ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), - brdp->ioctrl); - } - - retval = -EBUSY; - 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); - goto err; - } - - 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); - goto err_rel1; - } - -/* - * Everything looks OK, so let's go ahead and probe for the hardware. - */ - brdp->clk = CD1400_CLK; - brdp->isr = stl_eiointr; - - retval = -ENODEV; - 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: - goto err_rel2; - } - break; - default: - goto err_rel2; - } - -/* - * We have verified that the board is actually present, so now we - * can complete the setup. - */ - - panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); - if (!panelp) { - printk(KERN_WARNING "STALLION: failed to allocate memory " - "(size=%Zd)\n", sizeof(struct stlpanel)); - retval = -ENOMEM; - goto err_rel2; - } - - 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 = &stl_sc26198uart; - panelp->isr = stl_sc26198intr; - } else { - panelp->uartp = &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, IRQF_SHARED, name, brdp) != 0) { - printk("STALLION: failed to register interrupt " - "routine for %s irq=%d\n", name, brdp->irq); - retval = -ENODEV; - goto err_fr; - } - - return 0; -err_fr: - stl_cleanup_panels(brdp); -err_rel2: - if (brdp->iosize2 > 0) - release_region(brdp->ioaddr2, brdp->iosize2); -err_rel1: - release_region(brdp->ioaddr1, brdp->iosize1); -err: - return retval; -} - -/*****************************************************************************/ - -/* - * Try to find an ECH board and initialize it. This code is capable of - * dealing with all types of ECH board. - */ - -static int __devinit stl_initech(struct stlbrd *brdp) -{ - struct stlpanel *panelp; - unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i; - int retval; - char *name; - - pr_debug("stl_initech(brdp=%p)\n", brdp); - - 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) { - retval = -ENODEV; - goto err; - } - 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); - retval = -EINVAL; - goto err; - } - 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) { - retval = -ENODEV; - goto err; - } - 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); - retval = -EINVAL; - goto err; - } - 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); - retval = -EINVAL; - goto err; - } - -/* - * Check boards for possible IO address conflicts and return fail status - * if an IO conflict found. - */ - retval = -EBUSY; - 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); - goto err; - } - - 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); - goto err_rel1; - } - -/* - * 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 = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); - if (!panelp) { - printk("STALLION: failed to allocate memory " - "(size=%Zd)\n", sizeof(struct stlpanel)); - retval = -ENOMEM; - goto err_fr; - } - 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 = &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 = &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))) { - retval = -EINVAL; - goto err_fr; - } - } - - 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, IRQF_SHARED, name, brdp) != 0) { - printk("STALLION: failed to register interrupt " - "routine for %s irq=%d\n", name, brdp->irq); - retval = -ENODEV; - goto err_fr; - } - - return 0; -err_fr: - stl_cleanup_panels(brdp); - if (brdp->iosize2 > 0) - release_region(brdp->ioaddr2, brdp->iosize2); -err_rel1: - release_region(brdp->ioaddr1, brdp->iosize1); -err: - return retval; -} - -/*****************************************************************************/ - -/* - * 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 __devinit stl_brdinit(struct stlbrd *brdp) -{ - int i, retval; - - pr_debug("stl_brdinit(brdp=%p)\n", brdp); - - switch (brdp->brdtype) { - case BRD_EASYIO: - case BRD_EASYIOPCI: - retval = stl_initeio(brdp); - if (retval) - goto err; - break; - case BRD_ECH: - case BRD_ECHMC: - case BRD_ECHPCI: - case BRD_ECH64PCI: - retval = stl_initech(brdp); - if (retval) - goto err; - break; - default: - printk("STALLION: board=%d is unknown board type=%d\n", - brdp->brdnr, brdp->brdtype); - retval = -ENODEV; - goto err; - } - - 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); - goto err_free; - } - - for (i = 0; i < STL_MAXPANELS; i++) - if (brdp->panels[i] != 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; -err_free: - free_irq(brdp->irq, brdp); - - stl_cleanup_panels(brdp); - - release_region(brdp->ioaddr1, brdp->iosize1); - if (brdp->iosize2 > 0) - release_region(brdp->ioaddr2, brdp->iosize2); -err: - return retval; -} - -/*****************************************************************************/ - -/* - * Find the next available board number that is free. - */ - -static int __devinit stl_getbrdnr(void) -{ - unsigned int i; - - for (i = 0; i < STL_MAXBRDS; i++) - if (stl_brds[i] == NULL) { - if (i >= stl_nrbrds) - stl_nrbrds = i + 1; - return i; - } - - return -1; -} - -/*****************************************************************************/ -/* - * We have a Stallion board. Allocate a board structure and - * initialize it. Read its IO and IRQ resources from PCI - * configuration space. - */ - -static int __devinit stl_pciprobe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct stlbrd *brdp; - unsigned int i, brdtype = ent->driver_data; - int brdnr, retval = -ENODEV; - - if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) - goto err; - - retval = pci_enable_device(pdev); - if (retval) - goto err; - brdp = stl_allocbrd(); - if (brdp == NULL) { - retval = -ENOMEM; - goto err; - } - mutex_lock(&stl_brdslock); - brdnr = stl_getbrdnr(); - if (brdnr < 0) { - dev_err(&pdev->dev, "too many boards found, " - "maximum supported %d\n", STL_MAXBRDS); - mutex_unlock(&stl_brdslock); - retval = -ENODEV; - goto err_fr; - } - brdp->brdnr = (unsigned int)brdnr; - stl_brds[brdp->brdnr] = brdp; - mutex_unlock(&stl_brdslock); - - brdp->brdtype = brdtype; - brdp->state |= STL_PROBED; - -/* - * 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(pdev, 0); - brdp->ioaddr1 = pci_resource_start(pdev, 1); - break; - case BRD_ECH64PCI: - brdp->ioaddr2 = pci_resource_start(pdev, 2); - brdp->ioaddr1 = pci_resource_start(pdev, 1); - break; - case BRD_EASYIOPCI: - brdp->ioaddr1 = pci_resource_start(pdev, 2); - brdp->ioaddr2 = pci_resource_start(pdev, 1); - break; - default: - dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype); - break; - } - - brdp->irq = pdev->irq; - retval = stl_brdinit(brdp); - if (retval) - goto err_null; - - pci_set_drvdata(pdev, brdp); - - for (i = 0; i < brdp->nrports; i++) - tty_register_device(stl_serial, - brdp->brdnr * STL_MAXPORTS + i, &pdev->dev); - - return 0; -err_null: - stl_brds[brdp->brdnr] = NULL; -err_fr: - kfree(brdp); -err: - return retval; -} - -static void __devexit stl_pciremove(struct pci_dev *pdev) -{ - struct stlbrd *brdp = pci_get_drvdata(pdev); - unsigned int i; - - free_irq(brdp->irq, brdp); - - stl_cleanup_panels(brdp); - - release_region(brdp->ioaddr1, brdp->iosize1); - if (brdp->iosize2 > 0) - release_region(brdp->ioaddr2, brdp->iosize2); - - for (i = 0; i < brdp->nrports; i++) - tty_unregister_device(stl_serial, - brdp->brdnr * STL_MAXPORTS + i); - - stl_brds[brdp->brdnr] = NULL; - kfree(brdp); -} - -static struct pci_driver stl_pcidriver = { - .name = "stallion", - .id_table = stl_pcibrds, - .probe = stl_pciprobe, - .remove = __devexit_p(stl_pciremove) -}; - -/*****************************************************************************/ - -/* - * Return the board stats structure to user app. - */ - -static int stl_getbrdstats(combrd_t __user *bp) -{ - combrd_t stl_brdstats; - struct stlbrd *brdp; - struct stlpanel *panelp; - unsigned 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 == 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 struct stlport *stl_getport(int brdnr, int panelnr, int portnr) -{ - struct stlbrd *brdp; - struct stlpanel *panelp; - - if (brdnr < 0 || brdnr >= STL_MAXBRDS) - return NULL; - brdp = stl_brds[brdnr]; - if (brdp == NULL) - return NULL; - if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels) - return NULL; - panelp = brdp->panels[panelnr]; - if (panelp == NULL) - return NULL; - if (portnr < 0 || (unsigned int)portnr >= panelp->nrports) - return 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(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp) -{ - comstats_t stl_comstats; - 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 == NULL) - return -ENODEV; - } - - mutex_lock(&portp->port.mutex); - portp->stats.state = portp->istate; - portp->stats.flags = portp->port.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; - - spin_lock_irqsave(&stallion_lock, flags); - if (tty != NULL && portp->port.tty == tty) { - portp->stats.ttystate = tty->flags; - /* No longer available as a statistic */ - portp->stats.rxbuffered = 1; /*tty->flip.count; */ - if (tty->termios != NULL) { - portp->stats.cflags = tty->termios->c_cflag; - portp->stats.iflags = tty->termios->c_iflag; - portp->stats.oflags = tty->termios->c_oflag; - portp->stats.lflags = tty->termios->c_lflag; - } - } - spin_unlock_irqrestore(&stallion_lock, 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); - mutex_unlock(&portp->port.mutex); - - 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(struct stlport *portp, comstats_t __user *cp) -{ - comstats_t stl_comstats; - - 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 == NULL) - return -ENODEV; - } - - mutex_lock(&portp->port.mutex); - memset(&portp->stats, 0, sizeof(comstats_t)); - portp->stats.brd = portp->brdnr; - portp->stats.panel = portp->panelnr; - portp->stats.port = portp->portnr; - mutex_unlock(&portp->port.mutex); - 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(struct stlport __user *arg) -{ - struct stlport stl_dummyport; - struct stlport *portp; - - if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) - 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(struct stlport)) ? -EFAULT : 0; -} - -/*****************************************************************************/ - -/* - * Return the entire driver board structure to a user app. - */ - -static int stl_getbrdstruct(struct stlbrd __user *arg) -{ - struct stlbrd stl_dummybrd; - struct stlbrd *brdp; - - if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) - return -EFAULT; - if (stl_dummybrd.brdnr >= STL_MAXBRDS) - return -ENODEV; - brdp = stl_brds[stl_dummybrd.brdnr]; - if (!brdp) - return -ENODEV; - return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -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 long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg) -{ - int brdnr, rc; - void __user *argp = (void __user *)arg; - - pr_debug("stl_memioctl(fp=%p,cmd=%x,arg=%lx)\n", fp, cmd,arg); - - brdnr = iminor(fp->f_dentry->d_inode); - if (brdnr >= STL_MAXBRDS) - return -ENODEV; - rc = 0; - - switch (cmd) { - case COM_GETPORTSTATS: - rc = stl_getportstats(NULL, 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 const 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, - .tiocmget = stl_tiocmget, - .tiocmset = stl_tiocmset, - .proc_fops = &stl_proc_fops, -}; - -static const struct tty_port_operations stl_port_ops = { - .carrier_raised = stl_carrier_raised, - .dtr_rts = stl_dtr_rts, - .activate = stl_activate, - .shutdown = stl_shutdown, -}; - -/*****************************************************************************/ -/* 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(struct stlport *portp, int regnr) -{ - outb((regnr + portp->uartaddr), portp->ioaddr); - return inb(portp->ioaddr + EREG_DATA); -} - -static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) -{ - outb(regnr + portp->uartaddr, portp->ioaddr); - outb(value, portp->ioaddr + EREG_DATA); -} - -static int stl_cd1400updatereg(struct stlport *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(struct stlbrd *brdp, struct stlpanel *panelp) -{ - unsigned int gfrcr; - int chipmask, i, j; - int nrchips, uartaddr, ioaddr; - unsigned long flags; - - pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); - return chipmask; -} - -/*****************************************************************************/ - -/* - * Initialize hardware specific port registers. - */ - -static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) -{ - unsigned long flags; - pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, - panelp, portp); - - if ((brdp == NULL) || (panelp == NULL) || - (portp == NULL)) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * 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(struct stlport *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(struct stlport *portp, struct ktermios *tiosp) -{ - struct stlbrd *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 == 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->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) - baudrate = 57600; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) - baudrate = 115200; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) - baudrate = 230400; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) - baudrate = 460800; - else if ((portp->port.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->port.flags |= ASYNC_CHECK_CD; - } else - portp->port.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. - */ - - pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", - portp->portnr, portp->panelnr, portp->brdnr); - pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", - cor1, cor2, cor3, cor4, cor5); - pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", - mcor1, mcor2, rtpr, sreron, sreroff); - pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); - pr_debug(" 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]); - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Set the state of the DTR and RTS signals. - */ - -static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) -{ - unsigned char msvr1, msvr2; - unsigned long flags; - - pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", - portp, dtr, rts); - - msvr1 = 0; - msvr2 = 0; - if (dtr > 0) - msvr1 = MSVR1_DTR; - if (rts > 0) - msvr2 = MSVR2_RTS; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Return the state of the signals. - */ - -static int stl_cd1400getsignals(struct stlport *portp) -{ - unsigned char msvr1, msvr2; - unsigned long flags; - int sigs; - - pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, 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(struct stlport *portp, int rx, int tx) -{ - unsigned char ccr; - unsigned long flags; - - pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); - - 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; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Start/stop the Transmitter and/or Receiver. - */ - -static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) -{ - unsigned char sreron, sreroff; - unsigned long flags; - - pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); - - 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; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Disable all interrupts from this port. - */ - -static void stl_cd1400disableintrs(struct stlport *portp) -{ - unsigned long flags; - - pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); - stl_cd1400setreg(portp, SRER, 0); - BRDDISABLE(portp->brdnr); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -static void stl_cd1400sendbreak(struct stlport *portp, int len) -{ - unsigned long flags; - - pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); - - spin_lock_irqsave(&brd_lock, flags); - 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++; - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Take flow control actions... - */ - -static void stl_cd1400flowctrl(struct stlport *portp, int state) -{ - struct tty_struct *tty; - unsigned long flags; - - pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); - - if (portp == NULL) - return; - tty = tty_port_tty_get(&portp->port); - if (tty == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); - tty_kref_put(tty); -} - -/*****************************************************************************/ - -/* - * Send a flow control character... - */ - -static void stl_cd1400sendflow(struct stlport *portp, int state) -{ - struct tty_struct *tty; - unsigned long flags; - - pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); - - if (portp == NULL) - return; - tty = tty_port_tty_get(&portp->port); - if (tty == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); - tty_kref_put(tty); -} - -/*****************************************************************************/ - -static void stl_cd1400flush(struct stlport *portp) -{ - unsigned long flags; - - pr_debug("stl_cd1400flush(portp=%p)\n", portp); - - if (portp == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Return the current state of data flow on this port. This is only - * really interesting 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(struct stlport *portp) -{ - pr_debug("stl_cd1400datastate(portp=%p)\n", portp); - - if (portp == NULL) - return 0; - - return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; -} - -/*****************************************************************************/ - -/* - * Interrupt service routine for cd1400 EasyIO boards. - */ - -static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) -{ - unsigned char svrtype; - - pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); - - spin_lock(&brd_lock); - 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); - - spin_unlock(&brd_lock); -} - -/*****************************************************************************/ - -/* - * Interrupt service routine for cd1400 panels. - */ - -static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) -{ - unsigned char svrtype; - - pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); - - 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 int stl_cd1400breakisr(struct stlport *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(struct stlpanel *panelp, int ioaddr) -{ - struct stlport *portp; - int len, stlen; - char *head, *tail; - unsigned char ioack, srer; - struct tty_struct *tty; - - pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); - - 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); - tty = tty_port_tty_get(&portp->port); - if (tty) { - tty_wakeup(tty); - tty_kref_put(tty); - } - } - - 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_t(unsigned int, 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(struct stlpanel *panelp, int ioaddr) -{ - struct stlport *portp; - struct tty_struct *tty; - unsigned int ioack, len, buflen; - unsigned char status; - char ch; - - pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); - - 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 = tty_port_tty_get(&portp->port); - - if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { - outb((RDCR + portp->uartaddr), ioaddr); - len = inb(ioaddr + EREG_DATA); - if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { - len = min_t(unsigned int, 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) { - unsigned char *ptr; - outb((RDSR + portp->uartaddr), ioaddr); - tty_prepare_flip_string(tty, &ptr, len); - insb((ioaddr + EREG_DATA), ptr, 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 != NULL && (portp->rxignoremsk & status) == 0) { - if (portp->rxmarkmsk & status) { - if (status & ST_BREAK) { - status = TTY_BREAK; - if (portp->port.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; - tty_insert_flip_char(tty, ch, status); - tty_schedule_flip(tty); - } - } else { - printk("STALLION: bad RX interrupt ack value=%x\n", ioack); - tty_kref_put(tty); - return; - } - -stl_rxalldone: - tty_kref_put(tty); - 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(struct stlpanel *panelp, int ioaddr) -{ - struct stlport *portp; - unsigned int ioack; - unsigned char misr; - - pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); - - 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) { - stl_cd_change(portp); - 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(struct stlport *portp, int regnr) -{ - outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); - return inb(portp->ioaddr + XP_DATA); -} - -static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) -{ - outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); - outb(value, (portp->ioaddr + XP_DATA)); -} - -static int stl_sc26198updatereg(struct stlport *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(struct stlport *portp, int regnr) -{ - outb(regnr, (portp->ioaddr + XP_ADDR)); - return inb(portp->ioaddr + XP_DATA); -} - -#if 0 -static void stl_sc26198setglobreg(struct stlport *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(struct stlbrd *brdp, struct stlpanel *panelp) -{ - int chipmask, i; - int nrchips, ioaddr; - - pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); - - 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(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) -{ - pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, - panelp, portp); - - if ((brdp == NULL) || (panelp == NULL) || - (portp == 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(struct stlport *portp, struct ktermios *tiosp) -{ - struct stlbrd *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 == 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->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) - baudrate = 57600; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) - baudrate = 115200; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) - baudrate = 230400; - else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) - baudrate = 460800; - else if ((portp->port.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->port.flags &= ~ASYNC_CHECK_CD; - } else { - iopr |= IOPR_DCDCOS; - imron |= IR_IOPORT; - portp->port.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. - */ - - pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", - portp->portnr, portp->panelnr, portp->brdnr); - pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); - pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); - pr_debug(" 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]); - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Set the state of the DTR and RTS signals. - */ - -static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) -{ - unsigned char iopioron, iopioroff; - unsigned long flags; - - pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, - dtr, rts); - - 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; - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - stl_sc26198setreg(portp, IOPIOR, - ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); - BRDDISABLE(portp->brdnr); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Return the state of the signals. - */ - -static int stl_sc26198getsignals(struct stlport *portp) -{ - unsigned char ipr; - unsigned long flags; - int sigs; - - pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - ipr = stl_sc26198getreg(portp, IPR); - BRDDISABLE(portp->brdnr); - spin_unlock_irqrestore(&brd_lock, 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(struct stlport *portp, int rx, int tx) -{ - unsigned char ccr; - unsigned long flags; - - pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx); - - 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; - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - stl_sc26198setreg(portp, SCCR, ccr); - BRDDISABLE(portp->brdnr); - portp->crenable = ccr; - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Start/stop the Transmitter and/or Receiver. - */ - -static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) -{ - unsigned char imr; - unsigned long flags; - - pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); - - 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; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Disable all interrupts from this port. - */ - -static void stl_sc26198disableintrs(struct stlport *portp) -{ - unsigned long flags; - - pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - portp->imr = 0; - stl_sc26198setreg(portp, IMR, 0); - BRDDISABLE(portp->brdnr); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -static void stl_sc26198sendbreak(struct stlport *portp, int len) -{ - unsigned long flags; - - pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Take flow control actions... - */ - -static void stl_sc26198flowctrl(struct stlport *portp, int state) -{ - struct tty_struct *tty; - unsigned long flags; - unsigned char mr0; - - pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); - - if (portp == NULL) - return; - tty = tty_port_tty_get(&portp->port); - if (tty == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); - tty_kref_put(tty); -} - -/*****************************************************************************/ - -/* - * Send a flow control character. - */ - -static void stl_sc26198sendflow(struct stlport *portp, int state) -{ - struct tty_struct *tty; - unsigned long flags; - unsigned char mr0; - - pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); - - if (portp == NULL) - return; - tty = tty_port_tty_get(&portp->port); - if (tty == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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); - spin_unlock_irqrestore(&brd_lock, flags); - tty_kref_put(tty); -} - -/*****************************************************************************/ - -static void stl_sc26198flush(struct stlport *portp) -{ - unsigned long flags; - - pr_debug("stl_sc26198flush(portp=%p)\n", portp); - - if (portp == NULL) - return; - - spin_lock_irqsave(&brd_lock, flags); - 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; - spin_unlock_irqrestore(&brd_lock, flags); -} - -/*****************************************************************************/ - -/* - * Return the current state of data flow on this port. This is only - * really interesting 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(struct stlport *portp) -{ - unsigned long flags; - unsigned char sr; - - pr_debug("stl_sc26198datastate(portp=%p)\n", portp); - - if (portp == NULL) - return 0; - if (test_bit(ASYI_TXBUSY, &portp->istate)) - return 1; - - spin_lock_irqsave(&brd_lock, flags); - BRDENABLE(portp->brdnr, portp->pagenr); - sr = stl_sc26198getreg(portp, SR); - BRDDISABLE(portp->brdnr); - spin_unlock_irqrestore(&brd_lock, 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(struct stlport *portp) -{ - int i; - - pr_debug("stl_sc26198wait(portp=%p)\n", portp); - - if (portp == 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 void stl_sc26198txunflow(struct stlport *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(struct stlpanel *panelp, unsigned int iobase) -{ - struct stlport *portp; - unsigned int iack; - - spin_lock(&brd_lock); - -/* - * 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); - - spin_unlock(&brd_lock); -} - -/*****************************************************************************/ - -/* - * 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(struct stlport *portp) -{ - struct tty_struct *tty; - unsigned int ioaddr; - unsigned char mr0; - int len, stlen; - char *head, *tail; - - pr_debug("stl_sc26198txisr(portp=%p)\n", portp); - - 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); - tty = tty_port_tty_get(&portp->port); - if (tty) { - tty_wakeup(tty); - tty_kref_put(tty); - } - } - - 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_t(unsigned int, 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(struct stlport *portp, unsigned int iack) -{ - struct tty_struct *tty; - unsigned int len, buflen, ioaddr; - - pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); - - tty = tty_port_tty_get(&portp->port); - ioaddr = portp->ioaddr; - outb(GIBCR, (ioaddr + XP_ADDR)); - len = inb(ioaddr + XP_DATA) + 1; - - if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { - if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { - len = min_t(unsigned int, 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) { - unsigned char *ptr; - outb(GRXFIFO, (ioaddr + XP_ADDR)); - tty_prepare_flip_string(tty, &ptr, len); - insb((ioaddr + XP_DATA), ptr, 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 != NULL) && - (tty->termios != NULL) && - (tty->termios->c_iflag & IXANY)) { - stl_sc26198txunflow(portp, tty); - } - } - tty_kref_put(tty); -} - -/*****************************************************************************/ - -/* - * Process an RX bad character. - */ - -static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) -{ - struct tty_struct *tty; - unsigned int ioaddr; - - tty = tty_port_tty_get(&portp->port); - 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 != NULL) && - ((portp->rxignoremsk & status) == 0)) { - if (portp->rxmarkmsk & status) { - if (status & SR_RXBREAK) { - status = TTY_BREAK; - if (portp->port.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; - - tty_insert_flip_char(tty, ch, status); - tty_schedule_flip(tty); - - if (status == 0) - portp->stats.rxtotal++; - } - tty_kref_put(tty); -} - -/*****************************************************************************/ - -/* - * 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(struct stlport *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(struct stlport *portp, unsigned int iack) -{ - unsigned char cir, ipr, xisr; - - pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); - - cir = stl_sc26198getglobreg(portp, CIR); - - switch (cir & CIR_SUBTYPEMASK) { - case CIR_SUBCOS: - ipr = stl_sc26198getreg(portp, IPR); - if (ipr & IPR_DCDCHANGE) { - stl_cd_change(portp); - 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; - } -} - -static void stl_free_isabrds(void) -{ - struct stlbrd *brdp; - unsigned int i; - - for (i = 0; i < stl_nrbrds; i++) { - if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED)) - continue; - - free_irq(brdp->irq, brdp); - - stl_cleanup_panels(brdp); - - release_region(brdp->ioaddr1, brdp->iosize1); - if (brdp->iosize2 > 0) - release_region(brdp->ioaddr2, brdp->iosize2); - - kfree(brdp); - stl_brds[i] = NULL; - } -} - -/* - * Loadable module initialization stuff. - */ -static int __init stallion_module_init(void) -{ - struct stlbrd *brdp; - struct stlconf conf; - unsigned int i, j; - int retval; - - printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); - - spin_lock_init(&stallion_lock); - spin_lock_init(&brd_lock); - - stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); - if (!stl_serial) { - retval = -ENOMEM; - goto err; - } - - stl_serial->owner = THIS_MODULE; - stl_serial->driver_name = stl_drvname; - stl_serial->name = "ttyE"; - 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_DRIVER_DYNAMIC_DEV; - tty_set_operations(stl_serial, &stl_ops); - - retval = tty_register_driver(stl_serial); - if (retval) { - printk("STALLION: failed to register serial driver\n"); - goto err_frtty; - } - -/* - * Find any dynamically supported boards. That is via module load - * line options. - */ - 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()) == NULL) - continue; - brdp->brdnr = i; - brdp->brdtype = conf.brdtype; - brdp->ioaddr1 = conf.ioaddr1; - brdp->ioaddr2 = conf.ioaddr2; - brdp->irq = conf.irq; - brdp->irqtype = conf.irqtype; - stl_brds[brdp->brdnr] = brdp; - if (stl_brdinit(brdp)) { - stl_brds[brdp->brdnr] = NULL; - kfree(brdp); - } else { - for (j = 0; j < brdp->nrports; j++) - tty_register_device(stl_serial, - brdp->brdnr * STL_MAXPORTS + j, NULL); - stl_nrbrds = i + 1; - } - } - - /* this has to be _after_ isa finding because of locking */ - retval = pci_register_driver(&stl_pcidriver); - if (retval && stl_nrbrds == 0) { - printk(KERN_ERR "STALLION: can't register pci driver\n"); - goto err_unrtty; - } - -/* - * 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"); - - stallion_class = class_create(THIS_MODULE, "staliomem"); - if (IS_ERR(stallion_class)) - printk("STALLION: failed to create class\n"); - for (i = 0; i < 4; i++) - device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i), - NULL, "staliomem%d", i); - - return 0; -err_unrtty: - tty_unregister_driver(stl_serial); -err_frtty: - put_tty_driver(stl_serial); -err: - return retval; -} - -static void __exit stallion_module_exit(void) -{ - struct stlbrd *brdp; - unsigned int i, j; - - pr_debug("cleanup_module()\n"); - - printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, - stl_drvversion); - -/* - * 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. - */ - for (i = 0; i < stl_nrbrds; i++) { - if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED)) - continue; - for (j = 0; j < brdp->nrports; j++) - tty_unregister_device(stl_serial, - brdp->brdnr * STL_MAXPORTS + j); - } - - for (i = 0; i < 4; i++) - device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); - unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"); - class_destroy(stallion_class); - - pci_unregister_driver(&stl_pcidriver); - - stl_free_isabrds(); - - tty_unregister_driver(stl_serial); - put_tty_driver(stl_serial); -} - -module_init(stallion_module_init); -module_exit(stallion_module_exit); - -MODULE_AUTHOR("Greg Ungerer"); -MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); -MODULE_LICENSE("GPL"); |