/*****************************************************************************/ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_PCI #include #endif /*****************************************************************************/ /* * Define different board types. Use the standard Stallion "assigned" * board numbers. Boards supported in this driver are abbreviated as * EIO = EasyIO and ECH = EasyConnection 8/32. */ #define BRD_EASYIO 20 #define BRD_ECH 21 #define BRD_ECHMC 22 #define BRD_ECHPCI 26 #define BRD_ECH64PCI 27 #define BRD_EASYIOPCI 28 /* * Define a configuration structure to hold the board configuration. * Need to set this up in the code (for now) with the boards that are * to be configured into the system. This is what needs to be modified * when adding/removing/modifying boards. Each line entry in the * stl_brdconf[] array is a board. Each line contains io/irq/memory * ranges for that board (as well as what type of board it is). * Some examples: * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, * This line would configure an EasyIO board (4 or 8, no difference), * at io address 2a0 and irq 10. * Another example: * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, * This line will configure an EasyConnection 8/32 board at primary io * address 2a8, secondary io address 280 and irq 12. * Enter as many lines into this array as you want (only the first 4 * will actually be used!). Any combination of EasyIO and EasyConnection * boards can be specified. EasyConnection 8/32 boards can share their * secondary io addresses between each other. * * NOTE: there is no need to put any entries in this table for PCI * boards. They will be found automatically by the driver - provided * PCI BIOS32 support is compiled into the kernel. */ typedef struct { int brdtype; int ioaddr1; int ioaddr2; unsigned long memaddr; int irq; int irqtype; } stlconf_t; static stlconf_t stl_brdconf[] = { /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ }; static int stl_nrbrds = ARRAY_SIZE(stl_brdconf); /*****************************************************************************/ /* * Define some important driver characteristics. Device major numbers * allocated as per Linux Device Registry. */ #ifndef STL_SIOMEMMAJOR #define STL_SIOMEMMAJOR 28 #endif #ifndef STL_SERIALMAJOR #define STL_SERIALMAJOR 24 #endif #ifndef STL_CALLOUTMAJOR #define STL_CALLOUTMAJOR 25 #endif /* * Set the TX buffer size. Bigger is better, but we don't want * to chew too much memory with buffers! */ #define STL_TXBUFLOW 512 #define STL_TXBUFSIZE 4096 /*****************************************************************************/ /* * Define our local driver identity first. Set up stuff to deal with * all the local structures required by a serial tty driver. */ static char *stl_drvtitle = "Stallion Multiport Serial Driver"; static char *stl_drvname = "stallion"; static char *stl_drvversion = "5.6.0"; static struct tty_driver *stl_serial; /* * We will need to allocate a temporary write buffer for chars that * come direct from user space. The problem is that a copy from user * space might cause a page fault (typically on a system that is * swapping!). All ports will share one buffer - since if the system * is already swapping a shared buffer won't make things any worse. */ static char *stl_tmpwritebuf; /* * Define a local default termios struct. All ports will be created * with this termios initially. Basically all it defines is a raw port * at 9600, 8 data bits, 1 stop bit. */ static struct termios stl_deftermios = { .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), .c_cc = INIT_C_CC, }; /* * Define global stats structures. Not used often, and can be * re-used for each stats call. */ static comstats_t stl_comstats; static combrd_t stl_brdstats; static stlbrd_t stl_dummybrd; static stlport_t stl_dummyport; /* * Define global place to put buffer overflow characters. */ static char stl_unwanted[SC26198_RXFIFOSIZE]; /*****************************************************************************/ static stlbrd_t *stl_brds[STL_MAXBRDS]; /* * Per board state flags. Used with the state field of the board struct. * Not really much here! */ #define BRD_FOUND 0x1 /* * Define the port structure istate flags. These set of flags are * modified at interrupt time - so setting and reseting them needs * to be atomic. Use the bit clear/setting routines for this. */ #define ASYI_TXBUSY 1 #define ASYI_TXLOW 2 #define ASYI_DCDCHANGE 3 #define ASYI_TXFLOWED 4 /* * Define an array of board names as printable strings. Handy for * referencing boards when printing trace and stuff. */ static char *stl_brdnames[] = { (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, (char *) NULL, "EasyIO", "EC8/32-AT", "EC8/32-MC", (char *) NULL, (char *) NULL, (char *) NULL, "EC8/32-PCI", "EC8/64-PCI", "EasyIO-PCI", }; /*****************************************************************************/ /* * Define some string labels for arguments passed from the module * load line. These allow for easy board definitions, and easy * modification of the io, memory and irq resoucres. */ static int stl_nargs = 0; static char *board0[4]; static char *board1[4]; static char *board2[4]; static char *board3[4]; static char **stl_brdsp[] = { (char **) &board0, (char **) &board1, (char **) &board2, (char **) &board3 }; /* * Define a set of common board names, and types. This is used to * parse any module arguments. */ typedef struct stlbrdtype { char *name; int type; } stlbrdtype_t; static stlbrdtype_t stl_brdstr[] = { { "easyio", BRD_EASYIO }, { "eio", BRD_EASYIO }, { "20", BRD_EASYIO }, { "ec8/32", BRD_ECH }, { "ec8/32-at", BRD_ECH }, { "ec8/32-isa", BRD_ECH }, { "ech", BRD_ECH }, { "echat", BRD_ECH }, { "21", BRD_ECH }, { "ec8/32-mc", BRD_ECHMC }, { "ec8/32-mca", BRD_ECHMC }, { "echmc", BRD_ECHMC }, { "echmca", BRD_ECHMC }, { "22", BRD_ECHMC }, { "ec8/32-pc", BRD_ECHPCI }, { "ec8/32-pci", BRD_ECHPCI }, { "26", BRD_ECHPCI }, { "ec8/64-pc", BRD_ECH64PCI }, { "ec8/64-pci", BRD_ECH64PCI }, { "ech-pci", BRD_ECH64PCI }, { "echpci", BRD_ECH64PCI }, { "echpc", BRD_ECH64PCI }, { "27", BRD_ECH64PCI }, { "easyio-pc", BRD_EASYIOPCI }, { "easyio-pci", BRD_EASYIOPCI }, { "eio-pci", BRD_EASYIOPCI }, { "eiopci", BRD_EASYIOPCI }, { "28", BRD_EASYIOPCI }, }; /* * Define the module agruments. */ MODULE_AUTHOR("Greg Ungerer"); MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); MODULE_LICENSE("GPL"); module_param_array(board0, charp, &stl_nargs, 0); MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); module_param_array(board1, charp, &stl_nargs, 0); MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); module_param_array(board2, charp, &stl_nargs, 0); MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); module_param_array(board3, charp, &stl_nargs, 0); MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); /*****************************************************************************/ /* * Hardware ID bits for the EasyIO and ECH boards. These defines apply * to the directly accessible io ports of these boards (not the uarts - * they are in cd1400.h and sc26198.h). */ #define EIO_8PORTRS 0x04 #define EIO_4PORTRS 0x05 #define EIO_8PORTDI 0x00 #define EIO_8PORTM 0x06 #define EIO_MK3 0x03 #define EIO_IDBITMASK 0x07 #define EIO_BRDMASK 0xf0 #define ID_BRD4 0x10 #define ID_BRD8 0x20 #define ID_BRD16 0x30 #define EIO_INTRPEND 0x08 #define EIO_INTEDGE 0x00 #define EIO_INTLEVEL 0x08 #define EIO_0WS 0x10 #define ECH_ID 0xa0 #define ECH_IDBITMASK 0xe0 #define ECH_BRDENABLE 0x08 #define ECH_BRDDISABLE 0x00 #define ECH_INTENABLE 0x01 #define ECH_INTDISABLE 0x00 #define ECH_INTLEVEL 0x02 #define ECH_INTEDGE 0x00 #define ECH_INTRPEND 0x01 #define ECH_BRDRESET 0x01 #define ECHMC_INTENABLE 0x01 #define ECHMC_BRDRESET 0x02 #define ECH_PNLSTATUS 2 #define ECH_PNL16PORT 0x20 #define ECH_PNLIDMASK 0x07 #define ECH_PNLXPID 0x40 #define ECH_PNLINTRPEND 0x80 #define ECH_ADDR2MASK 0x1e0 /* * Define the vector mapping bits for the programmable interrupt board * hardware. These bits encode the interrupt for the board to use - it * is software selectable (except the EIO-8M). */ static unsigned char stl_vecmap[] = { 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 }; /* * Set up enable and disable macros for the ECH boards. They require * the secondary io address space to be activated and deactivated. * This way all ECH boards can share their secondary io region. * If this is an ECH-PCI board then also need to set the page pointer * to point to the correct page. */ #define BRDENABLE(brdnr,pagenr) \ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ stl_brds[(brdnr)]->ioctrl); \ else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ outb((pagenr), stl_brds[(brdnr)]->ioctrl); #define BRDDISABLE(brdnr) \ if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ stl_brds[(brdnr)]->ioctrl); #define STL_CD1400MAXBAUD 230400 #define STL_SC26198MAXBAUD 460800 #define STL_BAUDBASE 115200 #define STL_CLOSEDELAY (5 * HZ / 10) /*****************************************************************************/ #ifdef CONFIG_PCI /* * Define the Stallion PCI vendor and device IDs. */ #ifndef PCI_VENDOR_ID_STALLION #define PCI_VENDOR_ID_STALLION 0x124d #endif #ifndef PCI_DEVICE_ID_ECHPCI832 #define PCI_DEVICE_ID_ECHPCI832 0x0000 #endif #ifndef PCI_DEVICE_ID_ECHPCI864 #define PCI_DEVICE_ID_ECHPCI864 0x0002 #endif #ifndef PCI_DEVICE_ID_EIOPCI #define PCI_DEVICE_ID_EIOPCI 0x0003 #endif /* * Define structure to hold all Stallion PCI boards. */ typedef struct stlpcibrd { unsigned short vendid; unsigned short devid; int brdtype; } stlpcibrd_t; static stlpcibrd_t stl_pcibrds[] = { { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, }; static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds); #endif /*****************************************************************************/ /* * Define macros to extract a brd/port number from a minor number. */ #define MINOR2BRD(min) (((min) & 0xc0) >> 6) #define MINOR2PORT(min) ((min) & 0x3f) /* * Define a baud rate table that converts termios baud rate selector * into the actual baud rate value. All baud rate calculations are * based on the actual baud rate required. */ static unsigned int stl_baudrates[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 }; /* * Define some handy local macros... */ #undef MIN #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) #undef TOLOWER #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) /*****************************************************************************/ /* * Declare all those functions in this driver! */ static void stl_argbrds(void); static int stl_parsebrd(stlconf_t *confp, char **argp); static unsigned long stl_atol(char *str); static int stl_init(void); static int stl_open(struct tty_struct *tty, struct file *filp); static void stl_close(struct tty_struct *tty, struct file *filp); static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count); static void stl_putchar(struct tty_struct *tty, unsigned char ch); static void stl_flushchars(struct tty_struct *tty); static int stl_writeroom(struct tty_struct *tty); static int stl_charsinbuffer(struct tty_struct *tty); static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); static void stl_settermios(struct tty_struct *tty, struct termios *old); static void stl_throttle(struct tty_struct *tty); static void stl_unthrottle(struct tty_struct *tty); static void stl_stop(struct tty_struct *tty); static void stl_start(struct tty_struct *tty); static void stl_flushbuffer(struct tty_struct *tty); static void stl_breakctl(struct tty_struct *tty, int state); static void stl_waituntilsent(struct tty_struct *tty, int timeout); static void stl_sendxchar(struct tty_struct *tty, char ch); static void stl_hangup(struct tty_struct *tty); static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); static int stl_portinfo(stlport_t *portp, int portnr, char *pos); static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data); static int stl_brdinit(stlbrd_t *brdp); static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp); static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp); static int stl_getbrdstats(combrd_t __user *bp); static int stl_getportstats(stlport_t *portp, comstats_t __user *cp); static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp); static int stl_getportstruct(stlport_t __user *arg); static int stl_getbrdstruct(stlbrd_t __user *arg); static int stl_waitcarrier(stlport_t *portp, struct file *filp); static int stl_eiointr(stlbrd_t *brdp); static int stl_echatintr(stlbrd_t *brdp); static int stl_echmcaintr(stlbrd_t *brdp); static int stl_echpciintr(stlbrd_t *brdp); static int stl_echpci64intr(stlbrd_t *brdp); static void stl_offintr(void *private); static stlbrd_t *stl_allocbrd(void); static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); static inline int stl_initbrds(void); static inline int stl_initeio(stlbrd_t *brdp); static inline int stl_initech(stlbrd_t *brdp); static inline int stl_getbrdnr(void); #ifdef CONFIG_PCI static inline int stl_findpcibrds(void); static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp); #endif /* * CD1400 uart specific handling functions. */ static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); static int stl_cd1400getreg(stlport_t *portp, int regnr); static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); static int stl_cd1400getsignals(stlport_t *portp); static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); static void stl_cd1400ccrwait(stlport_t *portp); static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); static void stl_cd1400disableintrs(stlport_t *portp); static void stl_cd1400sendbreak(stlport_t *portp, int len); static void stl_cd1400flowctrl(stlport_t *portp, int state); static void stl_cd1400sendflow(stlport_t *portp, int state); static void stl_cd1400flush(stlport_t *portp); static int stl_cd1400datastate(stlport_t *portp); static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr); /* * SC26198 uart specific handling functions. */ static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); static int stl_sc26198getreg(stlport_t *portp, int regnr); static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); static int stl_sc26198getglobreg(stlport_t *portp, int regnr); static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); static int stl_sc26198getsignals(stlport_t *portp); static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); static void stl_sc26198disableintrs(stlport_t *portp); static void stl_sc26198sendbreak(stlport_t *portp, int len); static void stl_sc26198flowctrl(stlport_t *portp, int state); static void stl_sc26198sendflow(stlport_t *portp, int state); static void stl_sc26198flush(stlport_t *portp); static int stl_sc26198datastate(stlport_t *portp); static void stl_sc26198wait(stlport_t *portp); static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); static void stl_sc26198txisr(stlport_t *port); static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); static void stl_sc26198rxbadchars(stlport_t *portp); static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); /*****************************************************************************/ /* * Generic UART support structure. */ typedef struct uart { int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); void (*setport)(stlport_t *portp, struct termios *tiosp); int (*getsignals)(stlport_t *portp); void (*setsignals)(stlport_t *portp, int dtr, int rts); void (*enablerxtx)(stlport_t *portp, int rx, int tx); void (*startrxtx)(stlport_t *portp, int rx, int tx); void (*disableintrs)(stlport_t *portp); void (*sendbreak)(stlport_t *portp, int len); void (*flowctrl)(stlport_t *portp, int state); void (*sendflow)(stlport_t *portp, int state); void (*flush)(stlport_t *portp); int (*datastate)(stlport_t *portp); void (*intr)(stlpanel_t *panelp, unsigned int iobase); } uart_t; /* * Define some macros to make calling these functions nice and clean. */ #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) #define stl_setport (* ((uart_t *) portp->uartp)->setport) #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) #define stl_flush (* ((uart_t *) portp->uartp)->flush) #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) /*****************************************************************************/ /* * CD1400 UART specific data initialization. */ static uart_t stl_cd1400uart = { stl_cd1400panelinit, stl_cd1400portinit, stl_cd1400setport, stl_cd1400getsignals, stl_cd1400setsignals, stl_cd1400enablerxtx, stl_cd1400startrxtx, stl_cd1400disableintrs, stl_cd1400sendbreak, stl_cd1400flowctrl, stl_cd1400sendflow, stl_cd1400flush, stl_cd1400datastate, stl_cd1400eiointr }; /* * Define the offsets within the register bank of a cd1400 based panel. * These io address offsets are common to the EasyIO board as well. */ #define EREG_ADDR 0 #define EREG_DATA 4 #define EREG_RXACK 5 #define EREG_TXACK 6 #define EREG_MDACK 7 #define EREG_BANKSIZE 8 #define CD1400_CLK 25000000 #define CD1400_CLK8M 20000000 /* * Define the cd1400 baud rate clocks. These are used when calculating * what clock and divisor to use for the required baud rate. Also * define the maximum baud rate allowed, and the default base baud. */ static int stl_cd1400clkdivs[] = { CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 }; /*****************************************************************************/ /* * SC26198 UART specific data initization. */ static uart_t stl_sc26198uart = { stl_sc26198panelinit, stl_sc26198portinit, stl_sc26198setport, stl_sc26198getsignals, stl_sc26198setsignals, stl_sc26198enablerxtx, stl_sc26198startrxtx, stl_sc26198disableintrs, stl_sc26198sendbreak, stl_sc26198flowctrl, stl_sc26198sendflow, stl_sc26198flush, stl_sc26198datastate, stl_sc26198intr }; /* * Define the offsets within the register bank of a sc26198 based panel. */ #define XP_DATA 0 #define XP_ADDR 1 #define XP_MODID 2 #define XP_STATUS 2 #define XP_IACK 3 #define XP_BANKSIZE 4 /* * Define the sc26198 baud rate table. Offsets within the table * represent the actual baud rate selector of sc26198 registers. */ static unsigned int sc26198_baudtable[] = { 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 921600 }; #define SC26198_NRBAUDS 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 struct file_operations stl_fsiomem = { .owner = THIS_MODULE, .ioctl = stl_memioctl, }; /*****************************************************************************/ static struct class *stallion_class; /* * Loadable module initialization stuff. */ static int __init stallion_module_init(void) { unsigned long flags; #ifdef DEBUG printk("init_module()\n"); #endif save_flags(flags); cli(); stl_init(); restore_flags(flags); return 0; } /*****************************************************************************/ static void __exit stallion_module_exit(void) { stlbrd_t *brdp; stlpanel_t *panelp; stlport_t *portp; unsigned long flags; int i, j, k; #ifdef DEBUG printk("cleanup_module()\n"); #endif printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, stl_drvversion); save_flags(flags); cli(); /* * Free up all allocated resources used by the ports. This includes * memory and interrupts. As part of this process we will also do * a hangup on every open port - to try to flush out any processes * hanging onto ports. */ i = tty_unregister_driver(stl_serial); put_tty_driver(stl_serial); if (i) { printk("STALLION: failed to un-register tty driver, " "errno=%d\n", -i); restore_flags(flags); return; } for (i = 0; i < 4; i++) { devfs_remove("staliomem/%d", i); class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); } devfs_remove("staliomem"); if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) printk("STALLION: failed to un-register serial memory device, " "errno=%d\n", -i); class_destroy(stallion_class); kfree(stl_tmpwritebuf); for (i = 0; (i < stl_nrbrds); i++) { if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) continue; free_irq(brdp->irq, brdp); for (j = 0; (j < STL_MAXPANELS); j++) { panelp = brdp->panels[j]; if (panelp == (stlpanel_t *) NULL) continue; for (k = 0; (k < STL_PORTSPERPANEL); k++) { portp = panelp->ports[k]; if (portp == (stlport_t *) NULL) continue; if (portp->tty != (struct tty_struct *) NULL) stl_hangup(portp->tty); kfree(portp->tx.buf); kfree(portp); } kfree(panelp); } release_region(brdp->ioaddr1, brdp->iosize1); if (brdp->iosize2 > 0) release_region(brdp->ioaddr2, brdp->iosize2); kfree(brdp); stl_brds[i] = (stlbrd_t *) NULL; } restore_flags(flags); } module_init(stallion_module_init); module_exit(stallion_module_exit); /*****************************************************************************/ /* * Check for any arguments passed in on the module load command line. */ static void stl_argbrds(void) { stlconf_t conf; stlbrd_t *brdp; int i; #ifdef DEBUG printk("stl_argbrds()\n"); #endif for (i = stl_nrbrds; (i < stl_nargs); i++) { memset(&conf, 0, sizeof(conf)); if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) continue; if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) continue; stl_nrbrds = i + 1; brdp->brdnr = i; brdp->brdtype = conf.brdtype; brdp->ioaddr1 = conf.ioaddr1; brdp->ioaddr2 = conf.ioaddr2; brdp->irq = conf.irq; brdp->irqtype = conf.irqtype; stl_brdinit(brdp); } } /*****************************************************************************/ /* * Convert an ascii string number into an unsigned long. */ static unsigned long stl_atol(char *str) { unsigned long val; int base, c; char *sp; val = 0; sp = str; if ((*sp == '0') && (*(sp+1) == 'x')) { base = 16; sp += 2; } else if (*sp == '0') { base = 8; sp++; } else { base = 10; } for (; (*sp != 0); sp++) { c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); if ((c < 0) || (c >= base)) { printk("STALLION: invalid argument %s\n", str); val = 0; break; } val = (val * base) + c; } return val; } /*****************************************************************************/ /* * Parse the supplied argument string, into the board conf struct. */ static int stl_parsebrd(stlconf_t *confp, char **argp) { char *sp; int i; #ifdef DEBUG printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp); #endif if ((argp[0] == (char *) NULL) || (*argp[0] == 0)) return 0; for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) *sp = TOLOWER(*sp); 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] != (char *) NULL) && (*argp[i] != 0)) confp->ioaddr1 = stl_atol(argp[i]); i++; if (confp->brdtype == BRD_ECH) { if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) confp->ioaddr2 = stl_atol(argp[i]); i++; } if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) confp->irq = stl_atol(argp[i]); return 1; } /*****************************************************************************/ /* * Allocate a new board structure. Fill out the basic info in it. */ static stlbrd_t *stl_allocbrd(void) { stlbrd_t *brdp; brdp = kzalloc(sizeof(stlbrd_t), GFP_KERNEL); if (!brdp) { printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlbrd_t)); return NULL; } brdp->magic = STL_BOARDMAGIC; return brdp; } /*****************************************************************************/ static int stl_open(struct tty_struct *tty, struct file *filp) { stlport_t *portp; stlbrd_t *brdp; unsigned int minordev; int brdnr, panelnr, portnr, rc; #ifdef DEBUG printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty, (int) filp, tty->name); #endif minordev = tty->index; brdnr = MINOR2BRD(minordev); if (brdnr >= stl_nrbrds) return -ENODEV; brdp = stl_brds[brdnr]; if (brdp == (stlbrd_t *) NULL) return -ENODEV; minordev = MINOR2PORT(minordev); for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { if (brdp->panels[panelnr] == (stlpanel_t *) NULL) break; if (minordev < brdp->panels[panelnr]->nrports) { portnr = minordev; break; } minordev -= brdp->panels[panelnr]->nrports; } if (portnr < 0) return -ENODEV; portp = brdp->panels[panelnr]->ports[portnr]; if (portp == (stlport_t *) NULL) return -ENODEV; /* * On the first open of the device setup the port hardware, and * initialize the per port data structure. */ portp->tty = tty; tty->driver_data = portp; portp->refcount++; if ((portp->flags & ASYNC_INITIALIZED) == 0) { if (!portp->tx.buf) { 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); clear_bit(TTY_IO_ERROR, &tty->flags); portp->flags |= ASYNC_INITIALIZED; } /* * Check if this port is in the middle of closing. If so then wait * until it is closed then return error status, based on flag settings. * The sleep here does not need interrupt protection since the wakeup * for it is done with the same context. */ if (portp->flags & ASYNC_CLOSING) { interruptible_sleep_on(&portp->close_wait); if (portp->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; return -ERESTARTSYS; } /* * Based on type of open being done check if it can overlap with any * previous opens still in effect. If we are a normal serial device * then also we might have to wait for carrier. */ if (!(filp->f_flags & O_NONBLOCK)) { if ((rc = stl_waitcarrier(portp, filp)) != 0) return rc; } portp->flags |= ASYNC_NORMAL_ACTIVE; return 0; } /*****************************************************************************/ /* * Possibly need to wait for carrier (DCD signal) to come high. Say * maybe because if we are clocal then we don't need to wait... */ static int stl_waitcarrier(stlport_t *portp, struct file *filp) { unsigned long flags; int rc, doclocal; #ifdef DEBUG printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); #endif rc = 0; doclocal = 0; if (portp->tty->termios->c_cflag & CLOCAL) doclocal++; save_flags(flags); cli(); portp->openwaitcnt++; if (! tty_hung_up_p(filp)) portp->refcount--; for (;;) { stl_setsignals(portp, 1, 1); if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) { if (portp->flags & ASYNC_HUP_NOTIFY) rc = -EBUSY; else rc = -ERESTARTSYS; break; } if (((portp->flags & ASYNC_CLOSING) == 0) && (doclocal || (portp->sigs & TIOCM_CD))) { break; } if (signal_pending(current)) { rc = -ERESTARTSYS; break; } interruptible_sleep_on(&portp->open_wait); } if (! tty_hung_up_p(filp)) portp->refcount++; portp->openwaitcnt--; restore_flags(flags); return rc; } /*****************************************************************************/ static void stl_close(struct tty_struct *tty, struct file *filp) { stlport_t *portp; unsigned long flags; #ifdef DEBUG printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); #endif portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; save_flags(flags); cli(); if (tty_hung_up_p(filp)) { restore_flags(flags); return; } if ((tty->count == 1) && (portp->refcount != 1)) portp->refcount = 1; if (portp->refcount-- > 1) { restore_flags(flags); return; } portp->refcount = 0; portp->flags |= ASYNC_CLOSING; /* * May want to wait for any data to drain before closing. The BUSY * flag keeps track of whether we are still sending or not - it is * very accurate for the cd1400, not quite so for the sc26198. * (The sc26198 has no "end-of-data" interrupt only empty FIFO) */ tty->closing = 1; if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) tty_wait_until_sent(tty, portp->closing_wait); stl_waituntilsent(tty, (HZ / 2)); portp->flags &= ~ASYNC_INITIALIZED; stl_disableintrs(portp); if (tty->termios->c_cflag & HUPCL) stl_setsignals(portp, 0, 0); stl_enablerxtx(portp, 0, 0); stl_flushbuffer(tty); portp->istate = 0; if (portp->tx.buf != (char *) NULL) { kfree(portp->tx.buf); portp->tx.buf = (char *) NULL; portp->tx.head = (char *) NULL; portp->tx.tail = (char *) NULL; } set_bit(TTY_IO_ERROR, &tty->flags); tty_ldisc_flush(tty); tty->closing = 0; portp->tty = (struct tty_struct *) NULL; if (portp->openwaitcnt) { if (portp->close_delay) msleep_interruptible(jiffies_to_msecs(portp->close_delay)); wake_up_interruptible(&portp->open_wait); } portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); wake_up_interruptible(&portp->close_wait); restore_flags(flags); } /*****************************************************************************/ /* * Write routine. Take data and stuff it in to the TX ring queue. * If transmit interrupts are not running then start them. */ static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) { stlport_t *portp; unsigned int len, stlen; unsigned char *chbuf; char *head, *tail; #ifdef DEBUG printk("stl_write(tty=%x,buf=%x,count=%d)\n", (int) tty, (int) buf, count); #endif if ((tty == (struct tty_struct *) NULL) || (stl_tmpwritebuf == (char *) NULL)) return 0; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return 0; if (portp->tx.buf == (char *) NULL) return 0; /* * If copying direct from user space we must cater for page faults, * causing us to "sleep" here for a while. To handle this copy in all * the data we need now, into a local buffer. Then when we got it all * copy it into the TX buffer. */ chbuf = (unsigned char *) buf; head = portp->tx.head; tail = portp->tx.tail; if (head >= tail) { len = STL_TXBUFSIZE - (head - tail) - 1; stlen = STL_TXBUFSIZE - (head - portp->tx.buf); } else { len = tail - head - 1; stlen = len; } len = MIN(len, count); count = 0; while (len > 0) { stlen = MIN(len, stlen); memcpy(head, chbuf, stlen); len -= stlen; chbuf += stlen; count += stlen; head += stlen; if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { head = portp->tx.buf; stlen = tail - head; } } portp->tx.head = head; clear_bit(ASYI_TXLOW, &portp->istate); stl_startrxtx(portp, -1, 1); return count; } /*****************************************************************************/ static void stl_putchar(struct tty_struct *tty, unsigned char ch) { stlport_t *portp; unsigned int len; char *head, *tail; #ifdef DEBUG printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (portp->tx.buf == (char *) NULL) return; head = portp->tx.head; tail = portp->tx.tail; len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); len--; if (len > 0) { *head++ = ch; if (head >= (portp->tx.buf + STL_TXBUFSIZE)) head = portp->tx.buf; } portp->tx.head = head; } /*****************************************************************************/ /* * If there are any characters in the buffer then make sure that TX * interrupts are on and get'em out. Normally used after the putchar * routine has been called. */ static void stl_flushchars(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_flushchars(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (portp->tx.buf == (char *) NULL) return; #if 0 if (tty->stopped || tty->hw_stopped || (portp->tx.head == portp->tx.tail)) return; #endif stl_startrxtx(portp, -1, 1); } /*****************************************************************************/ static int stl_writeroom(struct tty_struct *tty) { stlport_t *portp; char *head, *tail; #ifdef DEBUG printk("stl_writeroom(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return 0; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return 0; if (portp->tx.buf == (char *) NULL) return 0; head = portp->tx.head; tail = portp->tx.tail; return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); } /*****************************************************************************/ /* * Return number of chars in the TX buffer. Normally we would just * calculate the number of chars in the buffer and return that, but if * the buffer is empty and TX interrupts are still on then we return * that the buffer still has 1 char in it. This way whoever called us * will not think that ALL chars have drained - since the UART still * must have some chars in it (we are busy after all). */ static int stl_charsinbuffer(struct tty_struct *tty) { stlport_t *portp; unsigned int size; char *head, *tail; #ifdef DEBUG printk("stl_charsinbuffer(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return 0; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return 0; if (portp->tx.buf == (char *) NULL) return 0; head = portp->tx.head; tail = portp->tx.tail; size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) size = 1; return size; } /*****************************************************************************/ /* * Generate the serial struct info. */ static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp) { struct serial_struct sio; stlbrd_t *brdp; #ifdef DEBUG printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); #endif memset(&sio, 0, sizeof(struct serial_struct)); sio.line = portp->portnr; sio.port = portp->ioaddr; sio.flags = portp->flags; sio.baud_base = portp->baud_base; sio.close_delay = portp->close_delay; sio.closing_wait = portp->closing_wait; sio.custom_divisor = portp->custom_divisor; sio.hub6 = 0; if (portp->uartp == &stl_cd1400uart) { sio.type = PORT_CIRRUS; sio.xmit_fifo_size = CD1400_TXFIFOSIZE; } else { sio.type = PORT_UNKNOWN; sio.xmit_fifo_size = SC26198_TXFIFOSIZE; } brdp = stl_brds[portp->brdnr]; if (brdp != (stlbrd_t *) NULL) sio.irq = brdp->irq; return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; } /*****************************************************************************/ /* * Set port according to the serial struct info. * At this point we do not do any auto-configure stuff, so we will * just quietly ignore any requests to change irq, etc. */ static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp) { struct serial_struct sio; #ifdef DEBUG printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); #endif if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) return -EFAULT; if (!capable(CAP_SYS_ADMIN)) { if ((sio.baud_base != portp->baud_base) || (sio.close_delay != portp->close_delay) || ((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK))) return -EPERM; } portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK); portp->baud_base = sio.baud_base; portp->close_delay = sio.close_delay; portp->closing_wait = sio.closing_wait; portp->custom_divisor = sio.custom_divisor; stl_setport(portp, portp->tty->termios); return 0; } /*****************************************************************************/ static int stl_tiocmget(struct tty_struct *tty, struct file *file) { stlport_t *portp; if (tty == (struct tty_struct *) NULL) return -ENODEV; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return -ENODEV; if (tty->flags & (1 << TTY_IO_ERROR)) return -EIO; return stl_getsignals(portp); } static int stl_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { stlport_t *portp; int rts = -1, dtr = -1; if (tty == (struct tty_struct *) NULL) return -ENODEV; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return -ENODEV; if (tty->flags & (1 << TTY_IO_ERROR)) return -EIO; if (set & TIOCM_RTS) rts = 1; if (set & TIOCM_DTR) dtr = 1; if (clear & TIOCM_RTS) rts = 0; if (clear & TIOCM_DTR) dtr = 0; stl_setsignals(portp, dtr, rts); return 0; } static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { stlport_t *portp; unsigned int ival; int rc; void __user *argp = (void __user *)arg; #ifdef DEBUG printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg); #endif if (tty == (struct tty_struct *) NULL) return -ENODEV; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return -ENODEV; if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { if (tty->flags & (1 << TTY_IO_ERROR)) return -EIO; } rc = 0; switch (cmd) { case TIOCGSOFTCAR: rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned __user *) argp); break; case TIOCSSOFTCAR: if (get_user(ival, (unsigned int __user *) arg)) return -EFAULT; tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (ival ? CLOCAL : 0); break; case TIOCGSERIAL: rc = stl_getserial(portp, argp); break; case TIOCSSERIAL: rc = stl_setserial(portp, argp); break; case COM_GETPORTSTATS: rc = stl_getportstats(portp, argp); break; case COM_CLRPORTSTATS: rc = stl_clrportstats(portp, argp); break; case TIOCSERCONFIG: case TIOCSERGWILD: case TIOCSERSWILD: case TIOCSERGETLSR: case TIOCSERGSTRUCT: case TIOCSERGETMULTI: case TIOCSERSETMULTI: default: rc = -ENOIOCTLCMD; break; } return rc; } /*****************************************************************************/ static void stl_settermios(struct tty_struct *tty, struct termios *old) { stlport_t *portp; struct termios *tiosp; #ifdef DEBUG printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; tiosp = tty->termios; if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag)) return; stl_setport(portp, tiosp); stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), -1); if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { tty->hw_stopped = 0; stl_start(tty); } if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) wake_up_interruptible(&portp->open_wait); } /*****************************************************************************/ /* * Attempt to flow control who ever is sending us data. Based on termios * settings use software or/and hardware flow control. */ static void stl_throttle(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_throttle(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flowctrl(portp, 0); } /*****************************************************************************/ /* * Unflow control the device sending us data... */ static void stl_unthrottle(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_unthrottle(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flowctrl(portp, 1); } /*****************************************************************************/ /* * Stop the transmitter. Basically to do this we will just turn TX * interrupts off. */ static void stl_stop(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_stop(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_startrxtx(portp, -1, 0); } /*****************************************************************************/ /* * Start the transmitter again. Just turn TX interrupts back on. */ static void stl_start(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_start(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_startrxtx(portp, -1, 1); } /*****************************************************************************/ /* * Hangup this port. This is pretty much like closing the port, only * a little more brutal. No waiting for data to drain. Shutdown the * port and maybe drop signals. */ static void stl_hangup(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_hangup(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; portp->flags &= ~ASYNC_INITIALIZED; stl_disableintrs(portp); if (tty->termios->c_cflag & HUPCL) stl_setsignals(portp, 0, 0); stl_enablerxtx(portp, 0, 0); stl_flushbuffer(tty); portp->istate = 0; set_bit(TTY_IO_ERROR, &tty->flags); if (portp->tx.buf != (char *) NULL) { kfree(portp->tx.buf); portp->tx.buf = (char *) NULL; portp->tx.head = (char *) NULL; portp->tx.tail = (char *) NULL; } portp->tty = (struct tty_struct *) NULL; portp->flags &= ~ASYNC_NORMAL_ACTIVE; portp->refcount = 0; wake_up_interruptible(&portp->open_wait); } /*****************************************************************************/ static void stl_flushbuffer(struct tty_struct *tty) { stlport_t *portp; #ifdef DEBUG printk("stl_flushbuffer(tty=%x)\n", (int) tty); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_flush(portp); tty_wakeup(tty); } /*****************************************************************************/ static void stl_breakctl(struct tty_struct *tty, int state) { stlport_t *portp; #ifdef DEBUG printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; stl_sendbreak(portp, ((state == -1) ? 1 : 2)); } /*****************************************************************************/ static void stl_waituntilsent(struct tty_struct *tty, int timeout) { stlport_t *portp; unsigned long tend; #ifdef DEBUG printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (timeout == 0) timeout = HZ; tend = jiffies + timeout; while (stl_datastate(portp)) { if (signal_pending(current)) break; msleep_interruptible(20); if (time_after_eq(jiffies, tend)) break; } } /*****************************************************************************/ static void stl_sendxchar(struct tty_struct *tty, char ch) { stlport_t *portp; #ifdef DEBUG printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch); #endif if (tty == (struct tty_struct *) NULL) return; portp = tty->driver_data; if (portp == (stlport_t *) NULL) return; if (ch == STOP_CHAR(tty)) stl_sendflow(portp, 0); else if (ch == START_CHAR(tty)) stl_sendflow(portp, 1); else stl_putchar(tty, ch); } /*****************************************************************************/ #define MAXLINE 80 /* * Format info for a specified port. The line is deliberately limited * to 80 characters. (If it is too long it will be truncated, if too * short then padded with spaces). */ static int stl_portinfo(stlport_t *portp, int portnr, char *pos) { char *sp; int sigs, cnt; sp = pos; sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", (int) portp->stats.txtotal, (int) portp->stats.rxtotal); if (portp->stats.rxframing) sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); if (portp->stats.rxparity) sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); if (portp->stats.rxbreaks) sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); if (portp->stats.rxoverrun) sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); sigs = stl_getsignals(portp); cnt = sprintf(sp, "%s%s%s%s%s ", (sigs & TIOCM_RTS) ? "|RTS" : "", (sigs & TIOCM_CTS) ? "|CTS" : "", (sigs & TIOCM_DTR) ? "|DTR" : "", (sigs & TIOCM_CD) ? "|DCD" : "", (sigs & TIOCM_DSR) ? "|DSR" : ""); *sp = ' '; sp += cnt; for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) *sp++ = ' '; if (cnt >= MAXLINE) pos[(MAXLINE - 2)] = '+'; pos[(MAXLINE - 1)] = '\n'; return MAXLINE; } /*****************************************************************************/ /* * Port info, read from the /proc file system. */ static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) { stlbrd_t *brdp; stlpanel_t *panelp; stlport_t *portp; int brdnr, panelnr, portnr, totalport; int curoff, maxoff; char *pos; #ifdef DEBUG printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x," "data=%x\n", (int) page, (int) start, (int) off, count, (int) eof, (int) data); #endif pos = page; totalport = 0; curoff = 0; if (off == 0) { pos += sprintf(pos, "%s: version %s", stl_drvtitle, stl_drvversion); while (pos < (page + MAXLINE - 1)) *pos++ = ' '; *pos++ = '\n'; } curoff = MAXLINE; /* * We scan through for each board, panel and port. The offset is * calculated on the fly, and irrelevant ports are skipped. */ for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { brdp = stl_brds[brdnr]; if (brdp == (stlbrd_t *) NULL) continue; if (brdp->state == 0) continue; maxoff = curoff + (brdp->nrports * MAXLINE); if (off >= maxoff) { curoff = maxoff; continue; } totalport = brdnr * STL_MAXPORTS; for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { panelp = brdp->panels[panelnr]; if (panelp == (stlpanel_t *) NULL) continue; maxoff = curoff + (panelp->nrports * MAXLINE); if (off >= maxoff) { curoff = maxoff; totalport += panelp->nrports; continue; } for (portnr = 0; (portnr < panelp->nrports); portnr++, totalport++) { portp = panelp->ports[portnr]; if (portp == (stlport_t *) NULL) continue; if (off >= (curoff += MAXLINE)) continue; if ((pos - page + MAXLINE) > count) goto stl_readdone; pos += stl_portinfo(portp, totalport, pos); } } } *eof = 1; stl_readdone: *start = page; return (pos - page); } /*****************************************************************************/ /* * All board interrupts are vectored through here first. This code then * calls off to the approrpriate board interrupt handlers. */ static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs) { stlbrd_t *brdp = (stlbrd_t *) dev_id; #ifdef DEBUG printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq, (int) regs); #endif return IRQ_RETVAL((* brdp->isr)(brdp)); } /*****************************************************************************/ /* * Interrupt service routine for EasyIO board types. */ static int stl_eiointr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int iobase; int handled = 0; panelp = brdp->panels[0]; iobase = panelp->iobase; while (inb(brdp->iostatus) & EIO_INTRPEND) { handled = 1; (* panelp->isr)(panelp, iobase); } return handled; } /*****************************************************************************/ /* * Interrupt service routine for ECH-AT board types. */ static int stl_echatintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; int handled = 0; outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); while (inb(brdp->iostatus) & ECH_INTRPEND) { handled = 1; for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); return handled; } /*****************************************************************************/ /* * Interrupt service routine for ECH-MCA board types. */ static int stl_echmcaintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; int handled = 0; while (inb(brdp->iostatus) & ECH_INTRPEND) { handled = 1; for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } return handled; } /*****************************************************************************/ /* * Interrupt service routine for ECH-PCI board types. */ static int stl_echpciintr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr, recheck; int handled = 0; while (1) { recheck = 0; for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); recheck++; handled = 1; } } if (! recheck) break; } return handled; } /*****************************************************************************/ /* * Interrupt service routine for ECH-8/64-PCI board types. */ static int stl_echpci64intr(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int ioaddr; int bnknr; int handled = 0; while (inb(brdp->ioctrl) & 0x1) { handled = 1; for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { ioaddr = brdp->bnkstataddr[bnknr]; if (inb(ioaddr) & ECH_PNLINTRPEND) { panelp = brdp->bnk2panel[bnknr]; (* panelp->isr)(panelp, (ioaddr & 0xfffc)); } } } return handled; } /*****************************************************************************/ /* * Service an off-level request for some channel. */ static void stl_offintr(void *private) { stlport_t *portp; struct tty_struct *tty; unsigned int oldsigs; portp = private; #ifdef DEBUG printk("stl_offintr(portp=%x)\n", (int) portp); #endif if (portp == (stlport_t *) NULL) return; tty = portp->tty; if (tty == (struct tty_struct *) NULL) return; lock_kernel(); if (test_bit(ASYI_TXLOW, &portp->istate)) { tty_wakeup(tty); } if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { clear_bit(ASYI_DCDCHANGE, &portp->istate); oldsigs = portp->sigs; portp->sigs = stl_getsignals(portp); if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) wake_up_interruptible(&portp->open_wait); if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { if (portp->flags & ASYNC_CHECK_CD) tty_hangup(tty); /* FIXME: module removal race here - AKPM */ } } unlock_kernel(); } /*****************************************************************************/ /* * Initialize all the ports on a panel. */ static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) { stlport_t *portp; int chipmask, i; #ifdef DEBUG printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); #endif chipmask = stl_panelinit(brdp, panelp); /* * All UART's are initialized (if found!). Now go through and setup * each ports data structures. */ for (i = 0; (i < panelp->nrports); i++) { portp = kzalloc(sizeof(stlport_t), GFP_KERNEL); if (!portp) { printk("STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlport_t)); break; } portp->magic = STL_PORTMAGIC; portp->portnr = i; portp->brdnr = panelp->brdnr; portp->panelnr = panelp->panelnr; portp->uartp = panelp->uartp; portp->clk = brdp->clk; portp->baud_base = STL_BAUDBASE; portp->close_delay = STL_CLOSEDELAY; portp->closing_wait = 30 * HZ; INIT_WORK(&portp->tqueue, stl_offintr, portp); init_waitqueue_head(&portp->open_wait); init_waitqueue_head(&portp->close_wait); portp->stats.brd = portp->brdnr; portp->stats.panel = portp->panelnr; portp->stats.port = portp->portnr; panelp->ports[i] = portp; stl_portinit(brdp, panelp, portp); } return(0); } /*****************************************************************************/ /* * Try to find and initialize an EasyIO board. */ static inline int stl_initeio(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int status; char *name; int rc; #ifdef DEBUG printk("stl_initeio(brdp=%x)\n", (int) brdp); #endif brdp->ioctrl = brdp->ioaddr1 + 1; brdp->iostatus = brdp->ioaddr1 + 2; status = inb(brdp->iostatus); if ((status & EIO_IDBITMASK) == EIO_MK3) brdp->ioctrl++; /* * Handle board specific stuff now. The real difference is PCI * or not PCI. */ if (brdp->brdtype == BRD_EASYIOPCI) { brdp->iosize1 = 0x80; brdp->iosize2 = 0x80; name = "serial(EIO-PCI)"; outb(0x41, (brdp->ioaddr2 + 0x4c)); } else { brdp->iosize1 = 8; name = "serial(EIO)"; if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } outb((stl_vecmap[brdp->irq] | EIO_0WS | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), brdp->ioctrl); } if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { printk(KERN_WARNING "STALLION: Warning, board %d I/O address " "%x conflicts with another device\n", brdp->brdnr, brdp->ioaddr1); return(-EBUSY); } if (brdp->iosize2 > 0) if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { printk(KERN_WARNING "STALLION: Warning, board %d I/O " "address %x conflicts with another device\n", brdp->brdnr, brdp->ioaddr2); printk(KERN_WARNING "STALLION: Warning, also " "releasing board %d I/O address %x \n", brdp->brdnr, brdp->ioaddr1); release_region(brdp->ioaddr1, brdp->iosize1); return(-EBUSY); } /* * Everything looks OK, so let's go ahead and probe for the hardware. */ brdp->clk = CD1400_CLK; brdp->isr = stl_eiointr; switch (status & EIO_IDBITMASK) { case EIO_8PORTM: brdp->clk = CD1400_CLK8M; /* fall thru */ case EIO_8PORTRS: case EIO_8PORTDI: brdp->nrports = 8; break; case EIO_4PORTRS: brdp->nrports = 4; break; case EIO_MK3: switch (status & EIO_BRDMASK) { case ID_BRD4: brdp->nrports = 4; break; case ID_BRD8: brdp->nrports = 8; break; case ID_BRD16: brdp->nrports = 16; break; default: return(-ENODEV); } break; default: return(-ENODEV); } /* * We have verified that the board is actually present, so now we * can complete the setup. */ panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); if (!panelp) { printk(KERN_WARNING "STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlpanel_t)); return -ENOMEM; } panelp->magic = STL_PANELMAGIC; panelp->brdnr = brdp->brdnr; panelp->panelnr = 0; panelp->nrports = brdp->nrports; panelp->iobase = brdp->ioaddr1; panelp->hwid = status; if ((status & EIO_IDBITMASK) == EIO_MK3) { panelp->uartp = (void *) &stl_sc26198uart; panelp->isr = stl_sc26198intr; } else { panelp->uartp = (void *) &stl_cd1400uart; panelp->isr = stl_cd1400eiointr; } brdp->panels[0] = panelp; brdp->nrpanels = 1; brdp->state |= BRD_FOUND; brdp->hwid = status; if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { printk("STALLION: failed to register interrupt " "routine for %s irq=%d\n", name, brdp->irq); rc = -ENODEV; } else { rc = 0; } return rc; } /*****************************************************************************/ /* * Try to find an ECH board and initialize it. This code is capable of * dealing with all types of ECH board. */ static inline int stl_initech(stlbrd_t *brdp) { stlpanel_t *panelp; unsigned int status, nxtid, ioaddr, conflict; int panelnr, banknr, i; char *name; #ifdef DEBUG printk("stl_initech(brdp=%x)\n", (int) brdp); #endif status = 0; conflict = 0; /* * Set up the initial board register contents for boards. This varies a * bit between the different board types. So we need to handle each * separately. Also do a check that the supplied IRQ is good. */ switch (brdp->brdtype) { case BRD_ECH: brdp->isr = stl_echatintr; brdp->ioctrl = brdp->ioaddr1 + 1; brdp->iostatus = brdp->ioaddr1 + 1; status = inb(brdp->iostatus); if ((status & ECH_IDBITMASK) != ECH_ID) return(-ENODEV); if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); status |= (stl_vecmap[brdp->irq] << 1); outb((status | ECH_BRDRESET), brdp->ioaddr1); brdp->ioctrlval = ECH_INTENABLE | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); for (i = 0; (i < 10); i++) outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); brdp->iosize1 = 2; brdp->iosize2 = 32; name = "serial(EC8/32)"; outb(status, brdp->ioaddr1); break; case BRD_ECHMC: brdp->isr = stl_echmcaintr; brdp->ioctrl = brdp->ioaddr1 + 0x20; brdp->iostatus = brdp->ioctrl; status = inb(brdp->iostatus); if ((status & ECH_IDBITMASK) != ECH_ID) return(-ENODEV); if ((brdp->irq < 0) || (brdp->irq > 15) || (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { printk("STALLION: invalid irq=%d for brd=%d\n", brdp->irq, brdp->brdnr); return(-EINVAL); } outb(ECHMC_BRDRESET, brdp->ioctrl); outb(ECHMC_INTENABLE, brdp->ioctrl); brdp->iosize1 = 64; name = "serial(EC8/32-MC)"; break; case BRD_ECHPCI: brdp->isr = stl_echpciintr; brdp->ioctrl = brdp->ioaddr1 + 2; brdp->iosize1 = 4; brdp->iosize2 = 8; name = "serial(EC8/32-PCI)"; break; case BRD_ECH64PCI: brdp->isr = stl_echpci64intr; brdp->ioctrl = brdp->ioaddr2 + 0x40; outb(0x43, (brdp->ioaddr1 + 0x4c)); brdp->iosize1 = 0x80; brdp->iosize2 = 0x80; name = "serial(EC8/64-PCI)"; break; default: printk("STALLION: unknown board type=%d\n", brdp->brdtype); return(-EINVAL); break; } /* * Check boards for possible IO address conflicts and return fail status * if an IO conflict found. */ if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { printk(KERN_WARNING "STALLION: Warning, board %d I/O address " "%x conflicts with another device\n", brdp->brdnr, brdp->ioaddr1); return(-EBUSY); } if (brdp->iosize2 > 0) if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { printk(KERN_WARNING "STALLION: Warning, board %d I/O " "address %x conflicts with another device\n", brdp->brdnr, brdp->ioaddr2); printk(KERN_WARNING "STALLION: Warning, also " "releasing board %d I/O address %x \n", brdp->brdnr, brdp->ioaddr1); release_region(brdp->ioaddr1, brdp->iosize1); return(-EBUSY); } /* * Scan through the secondary io address space looking for panels. * As we find'em allocate and initialize panel structures for each. */ brdp->clk = CD1400_CLK; brdp->hwid = status; ioaddr = brdp->ioaddr2; banknr = 0; panelnr = 0; nxtid = 0; for (i = 0; (i < STL_MAXPANELS); i++) { if (brdp->brdtype == BRD_ECHPCI) { outb(nxtid, brdp->ioctrl); ioaddr = brdp->ioaddr2; } status = inb(ioaddr + ECH_PNLSTATUS); if ((status & ECH_PNLIDMASK) != nxtid) break; panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); if (!panelp) { printk("STALLION: failed to allocate memory " "(size=%d)\n", sizeof(stlpanel_t)); break; } panelp->magic = STL_PANELMAGIC; panelp->brdnr = brdp->brdnr; panelp->panelnr = panelnr; panelp->iobase = ioad