diff options
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 461a5a04551..00000000000 --- 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 |