| /*****************************************************************************/ |
| |
| /* |
| * 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/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/cd1400.h> |
| #include <linux/sc26198.h> |
| #include <linux/comstats.h> |
| #include <linux/stallion.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| #include <linux/smp_lock.h> |
| #include <linux/device.h> |
| #include <linux/delay.h> |
| |
| #include <asm/io.h> |
| #include <asm/uaccess.h> |
| |
| #ifdef CONFIG_PCI |
| #include <linux/pci.h> |
| #endif |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Define different board types. Use the standard Stallion "assigned" |
| * board numbers. Boards supported in this driver are abbreviated as |
| * EIO = EasyIO and ECH = EasyConnection 8/32. |
| */ |
| #define BRD_EASYIO 20 |
| #define BRD_ECH 21 |
| #define BRD_ECHMC 22 |
| #define BRD_ECHPCI 26 |
| #define BRD_ECH64PCI 27 |
| #define BRD_EASYIOPCI 28 |
| |
| /* |
| * Define a configuration structure to hold the board configuration. |
| * Need to set this up in the code (for now) with the boards that are |
| * to be configured into the system. This is what needs to be modified |
| * when adding/removing/modifying boards. Each line entry in the |
| * stl_brdconf[] array is a board. Each line contains io/irq/memory |
| * ranges for that board (as well as what type of board it is). |
| * Some examples: |
| * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, |
| * This line would configure an EasyIO board (4 or 8, no difference), |
| * at io address 2a0 and irq 10. |
| * Another example: |
| * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, |
| * This line will configure an EasyConnection 8/32 board at primary io |
| * address 2a8, secondary io address 280 and irq 12. |
| * Enter as many lines into this array as you want (only the first 4 |
| * will actually be used!). Any combination of EasyIO and EasyConnection |
| * boards can be specified. EasyConnection 8/32 boards can share their |
| * secondary io addresses between each other. |
| * |
| * NOTE: there is no need to put any entries in this table for PCI |
| * boards. They will be found automatically by the driver - provided |
| * PCI BIOS32 support is compiled into the kernel. |
| */ |
| |
| static struct stlconf { |
| int brdtype; |
| int ioaddr1; |
| int ioaddr2; |
| unsigned long memaddr; |
| int irq; |
| int irqtype; |
| } 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; |
| |
| /* |
| * 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 struct stlbrd stl_dummybrd; |
| static struct stlport stl_dummyport; |
| |
| /* |
| * Define global place to put buffer overflow characters. |
| */ |
| static char stl_unwanted[SC26198_RXFIFOSIZE]; |
| |
| /*****************************************************************************/ |
| |
| static struct stlbrd *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[] = { |
| 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 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. |
| */ |
| |
| 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) |
| |
| /*****************************************************************************/ |
| |
| #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 int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
| static int stl_brdinit(struct stlbrd *brdp); |
| static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
| static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); |
| static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
| |
| /* |
| * 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 termios *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 termios *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 termios *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, |
| .ioctl = stl_memioctl, |
| }; |
| |
| static struct class *stallion_class; |
| |
| /* |
| * Check for any arguments passed in on the module load command line. |
| */ |
| |
| /*****************************************************************************/ |
| |
| /* |
| * 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 __init stl_parsebrd(struct stlconf *confp, char **argp) |
| { |
| char *sp; |
| 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 = stl_atol(argp[i]); |
| i++; |
| if (confp->brdtype == BRD_ECH) { |
| if ((argp[i] != NULL) && (*argp[i] != 0)) |
| confp->ioaddr2 = stl_atol(argp[i]); |
| i++; |
| } |
| if ((argp[i] != 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 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 void __init stl_argbrds(void) |
| { |
| struct stlconf conf; |
| struct stlbrd *brdp; |
| int i; |
| |
| pr_debug("stl_argbrds()\n"); |
| |
| for (i = stl_nrbrds; (i < stl_nargs); i++) { |
| memset(&conf, 0, sizeof(conf)); |
| if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
| continue; |
| if ((brdp = stl_allocbrd()) == NULL) |
| continue; |
| 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); |
| } |
| } |
| |
| /*****************************************************************************/ |
| |
| static int stl_open(struct tty_struct *tty, struct file *filp) |
| { |
| struct stlport *portp; |
| struct stlbrd *brdp; |
| unsigned int minordev; |
| int brdnr, panelnr, portnr, rc; |
| |
| 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; |
| |
| /* |
| * 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(struct stlport *portp, struct file *filp) |
| { |
| unsigned long flags; |
| int rc, doclocal; |
| |
| pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
| |
| rc = 0; |
| doclocal = 0; |
| |
| spin_lock_irqsave(&stallion_lock, flags); |
| |
| if (portp->tty->termios->c_cflag & CLOCAL) |
| doclocal++; |
| |
| portp->openwaitcnt++; |
| if (! tty_hung_up_p(filp)) |
| portp->refcount--; |
| |
| for (;;) { |
| /* Takes brd_lock internally */ |
| 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; |
| } |
| /* FIXME */ |
| interruptible_sleep_on(&portp->open_wait); |
| } |
| |
| if (! tty_hung_up_p(filp)) |
| portp->refcount++; |
| portp->openwaitcnt--; |
| spin_unlock_irqrestore(&stallion_lock, flags); |
| |
| return rc; |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_flushbuffer(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_flushbuffer(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| 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); |
| |
| if (tty == NULL) |
| return; |
| 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_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct stlport *portp; |
| unsigned long flags; |
| |
| pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
| |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| |
| spin_lock_irqsave(&stallion_lock, flags); |
| if (tty_hung_up_p(filp)) { |
| spin_unlock_irqrestore(&stallion_lock, flags); |
| return; |
| } |
| if ((tty->count == 1) && (portp->refcount != 1)) |
| portp->refcount = 1; |
| if (portp->refcount-- > 1) { |
| spin_unlock_irqrestore(&stallion_lock, 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; |
| |
| spin_unlock_irqrestore(&stallion_lock, flags); |
| |
| if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| tty_wait_until_sent(tty, portp->closing_wait); |
| stl_waituntilsent(tty, (HZ / 2)); |
| |
| |
| spin_lock_irqsave(&stallion_lock, flags); |
| portp->flags &= ~ASYNC_INITIALIZED; |
| spin_unlock_irqrestore(&stallion_lock, flags); |
| |
| 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 != NULL) { |
| kfree(portp->tx.buf); |
| portp->tx.buf = NULL; |
| portp->tx.head = NULL; |
| portp->tx.tail = NULL; |
| } |
| set_bit(TTY_IO_ERROR, &tty->flags); |
| tty_ldisc_flush(tty); |
| |
| tty->closing = 0; |
| portp->tty = 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); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * 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, 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) |
| { |
| struct stlport *portp; |
| unsigned int len; |
| char *head, *tail; |
| |
| pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| if (portp->tx.buf == 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) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_flushchars(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| 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); |
| |
| if (tty == NULL) |
| return 0; |
| 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); |
| |
| if (tty == NULL) |
| return 0; |
| 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)); |
| 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 != 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(struct stlport *portp, struct serial_struct __user *sp) |
| { |
| 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; |
| 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) |
| { |
| struct stlport *portp; |
| |
| if (tty == NULL) |
| return -ENODEV; |
| 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; |
| |
| if (tty == NULL) |
| return -ENODEV; |
| 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; |
| unsigned int ival; |
| 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); |
| |
| if (tty == NULL) |
| return -ENODEV; |
| 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 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; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Start the transmitter again. Just turn TX interrupts back on. |
| */ |
| |
| static void stl_start(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_start(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| stl_startrxtx(portp, -1, 1); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_settermios(struct tty_struct *tty, struct termios *old) |
| { |
| struct stlport *portp; |
| struct termios *tiosp; |
| |
| pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| |
| tiosp = tty->termios; |
| if ((tiosp->c_cflag == old->c_cflag) && |
| (tiosp->c_iflag == old->c_iflag)) |
| return; |
| |
| stl_setport(portp, tiosp); |
| stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
| -1); |
| if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
| tty->hw_stopped = 0; |
| stl_start(tty); |
| } |
| if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
| wake_up_interruptible(&portp->open_wait); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Attempt to flow control who ever is sending us data. Based on termios |
| * settings use software or/and hardware flow control. |
| */ |
| |
| static void stl_throttle(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_throttle(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| stl_flowctrl(portp, 0); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Unflow control the device sending us data... |
| */ |
| |
| static void stl_unthrottle(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_unthrottle(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| stl_flowctrl(portp, 1); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Stop the transmitter. Basically to do this we will just turn TX |
| * interrupts off. |
| */ |
| |
| static void stl_stop(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_stop(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| stl_startrxtx(portp, -1, 0); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Hangup this port. This is pretty much like closing the port, only |
| * a little more brutal. No waiting for data to drain. Shutdown the |
| * port and maybe drop signals. |
| */ |
| |
| static void stl_hangup(struct tty_struct *tty) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_hangup(tty=%p)\n", tty); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == 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 != NULL) { |
| kfree(portp->tx.buf); |
| portp->tx.buf = NULL; |
| portp->tx.head = NULL; |
| portp->tx.tail = NULL; |
| } |
| portp->tty = NULL; |
| portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
| portp->refcount = 0; |
| wake_up_interruptible(&portp->open_wait); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_breakctl(struct tty_struct *tty, int state) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| |
| stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_sendxchar(struct tty_struct *tty, char ch) |
| { |
| struct stlport *portp; |
| |
| pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
| |
| if (tty == NULL) |
| return; |
| portp = tty->driver_data; |
| if (portp == NULL) |
| return; |
| |
| if (ch == STOP_CHAR(tty)) |
| stl_sendflow(portp, 0); |
| else if (ch == START_CHAR(tty)) |
| stl_sendflow(portp, 1); |
| else |
| stl_putchar(tty, ch); |
| } |
| |
| /*****************************************************************************/ |
| |
| #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(struct stlport *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) |
| { |
| struct stlbrd *brdp; |
| struct stlpanel *panelp; |
| struct stlport *portp; |
| int brdnr, panelnr, portnr, totalport; |
| int curoff, maxoff; |
| char *pos; |
| |
| pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
| "data=%p\n", page, start, off, count, eof, data); |
| |
| 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 == 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 == 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 == 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 stlbrd *brdp = dev_id; |
| |
| pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
| |
| return IRQ_RETVAL((* brdp->isr)(brdp)); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Interrupt service routine for EasyIO board types. |
| */ |
| |
| static int stl_eiointr(struct stlbrd *brdp) |
| { |
| struct stlpanel *panelp; |
| unsigned int iobase; |
| int handled = 0; |
| |
| spin_lock(&brd_lock); |
| panelp = brdp->panels[0]; |
| iobase = panelp->iobase; |
| while (inb(brdp->iostatus) & EIO_INTRPEND) { |
| handled = 1; |
| (* panelp->isr)(panelp, iobase); |
| } |
| spin_unlock(&brd_lock); |
| return handled; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Interrupt service routine for ECH-AT board types. |
| */ |
| |
| static int stl_echatintr(struct stlbrd *brdp) |
| { |
| struct stlpanel *panelp; |
| unsigned int ioaddr; |
| 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(struct stlbrd *brdp) |
| { |
| struct stlpanel *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(struct stlbrd *brdp) |
| { |
| struct stlpanel *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(struct stlbrd *brdp) |
| { |
| struct stlpanel *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(struct work_struct *work) |
| { |
| struct stlport *portp = container_of(work, struct stlport, tqueue); |
| struct tty_struct *tty; |
| unsigned int oldsigs; |
| |
| pr_debug("stl_offintr(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return; |
| |
| tty = portp->tty; |
| if (tty == 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(struct stlbrd *brdp, struct stlpanel *panelp) |
| { |
| struct stlport *portp; |
| int chipmask, i; |
| |
| pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
| |
| chipmask = stl_panelinit(brdp, panelp); |
| |
| /* |
| * All UART's are initialized (if found!). Now go through and setup |
| * each ports data structures. |
| */ |
| for (i = 0; (i < panelp->nrports); i++) { |
| portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
| if (!portp) { |
| printk("STALLION: failed to allocate memory " |
| "(size=%Zd)\n", sizeof(struct stlport)); |
| break; |
| } |
| |
| 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); |
| 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 int __init stl_initeio(struct stlbrd *brdp) |
| { |
| struct stlpanel *panelp; |
| unsigned int status; |
| char *name; |
| int rc; |
| |
| pr_debug("stl_initeio(brdp=%p)\n", brdp); |
| |
| brdp->ioctrl = brdp->ioaddr1 + 1; |
| brdp->iostatus = brdp->ioaddr1 + 2; |
| |
| status = inb(brdp->iostatus); |
| if ((status & EIO_IDBITMASK) == EIO_MK3) |
| brdp->ioctrl++; |
| |
| /* |
| * Handle board specific stuff now. The real difference is PCI |
| * or not PCI. |
| */ |
| if (brdp->brdtype == BRD_EASYIOPCI) { |
| brdp->iosize1 = 0x80; |
| brdp->iosize2 = 0x80; |
| name = "serial(EIO-PCI)"; |
| outb(0x41, (brdp->ioaddr2 + 0x4c)); |
| } else { |
| brdp->iosize1 = 8; |
| name = "serial(EIO)"; |
| if ((brdp->irq < 0) || (brdp->irq > 15) || |
| (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| printk("STALLION: invalid irq=%d for brd=%d\n", |
| brdp->irq, brdp->brdnr); |
| 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(struct stlpanel), GFP_KERNEL); |
| if (!panelp) { |
| printk(KERN_WARNING "STALLION: failed to allocate memory " |
| "(size=%Zd)\n", sizeof(struct stlpanel)); |
| 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 = &stl_sc26198uart; |
| panelp->isr = stl_sc26198intr; |
| } else { |
| panelp->uartp = &stl_cd1400uart; |
| panelp->isr = stl_cd1400eiointr; |
| } |
| |
| brdp->panels[0] = panelp; |
| brdp->nrpanels = 1; |
| brdp->state |= BRD_FOUND; |
| brdp->hwid = status; |
| if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
| printk("STALLION: failed to register interrupt " |
| "routine for %s irq=%d\n", name, brdp->irq); |
| 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 int __init stl_initech(struct stlbrd *brdp) |
| { |
| struct stlpanel *panelp; |
| unsigned int status, nxtid, ioaddr, conflict; |
| int panelnr, banknr, i; |
| char *name; |
| |
| pr_debug("stl_initech(brdp=%p)\n", brdp); |
| |
| status = 0; |
| conflict = 0; |
| |
| /* |
| * Set up the initial board register contents for boards. This varies a |
| * bit between the different board types. So we need to handle each |
| * separately. Also do a check that the supplied IRQ is good. |
| */ |
| switch (brdp->brdtype) { |
| |
| case BRD_ECH: |
| brdp->isr = stl_echatintr; |
| brdp->ioctrl = brdp->ioaddr1 + 1; |
| brdp->iostatus = brdp->ioaddr1 + 1; |
| status = inb(brdp->iostatus); |
| if ((status & ECH_IDBITMASK) != ECH_ID) |
| 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(struct stlpanel), GFP_KERNEL); |
| if (!panelp) { |
| printk("STALLION: failed to allocate memory " |
| "(size=%Zd)\n", sizeof(struct stlpanel)); |
| break; |
| } |
| panelp->magic = STL_PANELMAGIC; |
| panelp->brdnr = brdp->brdnr; |
| panelp->panelnr = panelnr; |
| panelp->iobase = ioaddr; |
| panelp->pagenr = nxtid; |
| panelp->hwid = status; |
| brdp->bnk2panel[banknr] = panelp; |
| brdp->bnkpageaddr[banknr] = nxtid; |
| brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
| |
| if (status & ECH_PNLXPID) { |
| panelp->uartp = &stl_sc26198uart; |
| panelp->isr = stl_sc26198intr; |
| if (status & ECH_PNL16PORT) { |
| panelp->nrports = 16; |
| brdp->bnk2panel[banknr] = panelp; |
| brdp->bnkpageaddr[banknr] = nxtid; |
| brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
| ECH_PNLSTATUS; |
| } else { |
| panelp->nrports = 8; |
| } |
| } else { |
| panelp->uartp = &stl_cd1400uart; |
| panelp->isr = stl_cd1400echintr; |
| if (status & ECH_PNL16PORT) { |
| panelp->nrports = 16; |
| panelp->ackmask = 0x80; |
| if (brdp->brdtype != BRD_ECHPCI) |
| ioaddr += EREG_BANKSIZE; |
| brdp->bnk2panel[banknr] = panelp; |
| brdp->bnkpageaddr[banknr] = ++nxtid; |
| brdp->bnkstataddr[banknr++] = ioaddr + |
| ECH_PNLSTATUS; |
| } else { |
| panelp->nrports = 8; |
| panelp->ackmask = 0xc0; |
| } |
| } |
| |
| nxtid++; |
| ioaddr += EREG_BANKSIZE; |
| brdp->nrports += panelp->nrports; |
| brdp->panels[panelnr++] = panelp; |
| if ((brdp->brdtype != BRD_ECHPCI) && |
| (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
| break; |
| } |
| |
| brdp->nrpanels = panelnr; |
| brdp->nrbnks = banknr; |
| if (brdp->brdtype == BRD_ECH) |
| outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| |
| brdp->state |= BRD_FOUND; |
| if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
| printk("STALLION: failed to register interrupt " |
| "routine for %s irq=%d\n", name, brdp->irq); |
| i = -ENODEV; |
| } else { |
| i = 0; |
| } |
| |
| return(i); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Initialize and configure the specified board. |
| * Scan through all the boards in the configuration and see what we |
| * can find. Handle EIO and the ECH boards a little differently here |
| * since the initial search and setup is very different. |
| */ |
| |
| static int __init stl_brdinit(struct stlbrd *brdp) |
| { |
| int i; |
| |
| pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
| |
| switch (brdp->brdtype) { |
| case BRD_EASYIO: |
| case BRD_EASYIOPCI: |
| stl_initeio(brdp); |
| break; |
| case BRD_ECH: |
| case BRD_ECHMC: |
| case BRD_ECHPCI: |
| case BRD_ECH64PCI: |
| stl_initech(brdp); |
| break; |
| default: |
| printk("STALLION: board=%d is unknown board type=%d\n", |
| brdp->brdnr, brdp->brdtype); |
| return(ENODEV); |
| } |
| |
| stl_brds[brdp->brdnr] = brdp; |
| if ((brdp->state & BRD_FOUND) == 0) { |
| printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
| stl_brdnames[brdp->brdtype], brdp->brdnr, |
| brdp->ioaddr1, brdp->irq); |
| return(ENODEV); |
| } |
| |
| for (i = 0; (i < STL_MAXPANELS); i++) |
| if (brdp->panels[i] != NULL) |
| stl_initports(brdp, brdp->panels[i]); |
| |
| printk("STALLION: %s found, board=%d io=%x irq=%d " |
| "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
| brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
| brdp->nrports); |
| return(0); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Find the next available board number that is free. |
| */ |
| |
| static int __init stl_getbrdnr(void) |
| { |
| int i; |
| |
| for (i = 0; (i < STL_MAXBRDS); i++) { |
| if (stl_brds[i] == NULL) { |
| if (i >= stl_nrbrds) |
| stl_nrbrds = i + 1; |
| return(i); |
| } |
| } |
| return(-1); |
| } |
| |
| /*****************************************************************************/ |
| |
| #ifdef CONFIG_PCI |
| |
| /* |
| * We have a Stallion board. Allocate a board structure and |
| * initialize it. Read its IO and IRQ resources from PCI |
| * configuration space. |
| */ |
| |
| static int __init stl_initpcibrd(int brdtype, struct pci_dev *devp) |
| { |
| struct stlbrd *brdp; |
| |
| pr_debug("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
| devp->bus->number, devp->devfn); |
| |
| if (pci_enable_device(devp)) |
| return(-EIO); |
| if ((brdp = stl_allocbrd()) == NULL) |
| return(-ENOMEM); |
| if ((brdp->brdnr = stl_getbrdnr()) < 0) { |
| printk("STALLION: too many boards found, " |
| "maximum supported %d\n", STL_MAXBRDS); |
| return(0); |
| } |
| brdp->brdtype = brdtype; |
| |
| /* |
| * Different Stallion boards use the BAR registers in different ways, |
| * so set up io addresses based on board type. |
| */ |
| pr_debug("%s(%d): BAR[]=%Lx,%Lx,%Lx,%Lx IRQ=%x\n", __FILE__, __LINE__, |
| pci_resource_start(devp, 0), pci_resource_start(devp, 1), |
| pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); |
| |
| /* |
| * We have all resources from the board, so let's setup the actual |
| * board structure now. |
| */ |
| switch (brdtype) { |
| case BRD_ECHPCI: |
| brdp->ioaddr2 = pci_resource_start(devp, 0); |
| brdp->ioaddr1 = pci_resource_start(devp, 1); |
| break; |
| case BRD_ECH64PCI: |
| brdp->ioaddr2 = pci_resource_start(devp, 2); |
| brdp->ioaddr1 = pci_resource_start(devp, 1); |
| break; |
| case BRD_EASYIOPCI: |
| brdp->ioaddr1 = pci_resource_start(devp, 2); |
| brdp->ioaddr2 = pci_resource_start(devp, 1); |
| break; |
| default: |
| printk("STALLION: unknown PCI board type=%d\n", brdtype); |
| break; |
| } |
| |
| brdp->irq = devp->irq; |
| stl_brdinit(brdp); |
| |
| return(0); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Find all Stallion PCI boards that might be installed. Initialize each |
| * one as it is found. |
| */ |
| |
| |
| static int __init stl_findpcibrds(void) |
| { |
| struct pci_dev *dev = NULL; |
| int i, rc; |
| |
| pr_debug("stl_findpcibrds()\n"); |
| |
| for (i = 0; (i < stl_nrpcibrds); i++) |
| while ((dev = pci_find_device(stl_pcibrds[i].vendid, |
| stl_pcibrds[i].devid, dev))) { |
| |
| /* |
| * Found a device on the PCI bus that has our vendor and |
| * device ID. Need to check now that it is really us. |
| */ |
| if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
| continue; |
| |
| rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); |
| if (rc) |
| return(rc); |
| } |
| |
| return(0); |
| } |
| |
| #endif |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Scan through all the boards in the configuration and see what we |
| * can find. Handle EIO and the ECH boards a little differently here |
| * since the initial search and setup is too different. |
| */ |
| |
| static int __init stl_initbrds(void) |
| { |
| struct stlbrd *brdp; |
| struct stlconf *confp; |
| int i; |
| |
| pr_debug("stl_initbrds()\n"); |
| |
| if (stl_nrbrds > STL_MAXBRDS) { |
| printk("STALLION: too many boards in configuration table, " |
| "truncating to %d\n", STL_MAXBRDS); |
| stl_nrbrds = STL_MAXBRDS; |
| } |
| |
| /* |
| * Firstly scan the list of static boards configured. Allocate |
| * resources and initialize the boards as found. |
| */ |
| for (i = 0; (i < stl_nrbrds); i++) { |
| confp = &stl_brdconf[i]; |
| stl_parsebrd(confp, stl_brdsp[i]); |
| if ((brdp = stl_allocbrd()) == NULL) |
| return(-ENOMEM); |
| brdp->brdnr = i; |
| brdp->brdtype = confp->brdtype; |
| brdp->ioaddr1 = confp->ioaddr1; |
| brdp->ioaddr2 = confp->ioaddr2; |
| brdp->irq = confp->irq; |
| brdp->irqtype = confp->irqtype; |
| stl_brdinit(brdp); |
| } |
| |
| /* |
| * Find any dynamically supported boards. That is via module load |
| * line options or auto-detected on the PCI bus. |
| */ |
| stl_argbrds(); |
| #ifdef CONFIG_PCI |
| stl_findpcibrds(); |
| #endif |
| |
| return(0); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the board stats structure to user app. |
| */ |
| |
| static int stl_getbrdstats(combrd_t __user *bp) |
| { |
| struct stlbrd *brdp; |
| struct stlpanel *panelp; |
| int i; |
| |
| if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
| return -EFAULT; |
| if (stl_brdstats.brd >= STL_MAXBRDS) |
| return(-ENODEV); |
| brdp = stl_brds[stl_brdstats.brd]; |
| if (brdp == NULL) |
| return(-ENODEV); |
| |
| memset(&stl_brdstats, 0, sizeof(combrd_t)); |
| stl_brdstats.brd = brdp->brdnr; |
| stl_brdstats.type = brdp->brdtype; |
| stl_brdstats.hwid = brdp->hwid; |
| stl_brdstats.state = brdp->state; |
| stl_brdstats.ioaddr = brdp->ioaddr1; |
| stl_brdstats.ioaddr2 = brdp->ioaddr2; |
| stl_brdstats.irq = brdp->irq; |
| stl_brdstats.nrpanels = brdp->nrpanels; |
| stl_brdstats.nrports = brdp->nrports; |
| for (i = 0; (i < brdp->nrpanels); i++) { |
| panelp = brdp->panels[i]; |
| stl_brdstats.panels[i].panel = i; |
| stl_brdstats.panels[i].hwid = panelp->hwid; |
| stl_brdstats.panels[i].nrports = panelp->nrports; |
| } |
| |
| return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Resolve the referenced port number into a port struct pointer. |
| */ |
| |
| static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
| { |
| struct stlbrd *brdp; |
| struct stlpanel *panelp; |
| |
| if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
| return(NULL); |
| brdp = stl_brds[brdnr]; |
| if (brdp == NULL) |
| return(NULL); |
| if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
| return(NULL); |
| panelp = brdp->panels[panelnr]; |
| if (panelp == NULL) |
| return(NULL); |
| if ((portnr < 0) || (portnr >= panelp->nrports)) |
| return(NULL); |
| return(panelp->ports[portnr]); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the port stats structure to user app. A NULL port struct |
| * pointer passed in means that we need to find out from the app |
| * what port to get stats for (used through board control device). |
| */ |
| |
| static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
| { |
| unsigned char *head, *tail; |
| unsigned long flags; |
| |
| if (!portp) { |
| if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| return -EFAULT; |
| portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| stl_comstats.port); |
| if (portp == NULL) |
| return(-ENODEV); |
| } |
| |
| portp->stats.state = portp->istate; |
| portp->stats.flags = portp->flags; |
| portp->stats.hwid = portp->hwid; |
| |
| portp->stats.ttystate = 0; |
| portp->stats.cflags = 0; |
| portp->stats.iflags = 0; |
| portp->stats.oflags = 0; |
| portp->stats.lflags = 0; |
| portp->stats.rxbuffered = 0; |
| |
| spin_lock_irqsave(&stallion_lock, flags); |
| if (portp->tty != NULL) { |
| if (portp->tty->driver_data == portp) { |
| portp->stats.ttystate = portp->tty->flags; |
| /* No longer available as a statistic */ |
| portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ |
| if (portp->tty->termios != NULL) { |
| portp->stats.cflags = portp->tty->termios->c_cflag; |
| portp->stats.iflags = portp->tty->termios->c_iflag; |
| portp->stats.oflags = portp->tty->termios->c_oflag; |
| portp->stats.lflags = portp->tty->termios->c_lflag; |
| } |
| } |
| } |
| spin_unlock_irqrestore(&stallion_lock, flags); |
| |
| head = portp->tx.head; |
| tail = portp->tx.tail; |
| portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
| (STL_TXBUFSIZE - (tail - head))); |
| |
| portp->stats.signals = (unsigned long) stl_getsignals(portp); |
| |
| return copy_to_user(cp, &portp->stats, |
| sizeof(comstats_t)) ? -EFAULT : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Clear the port stats structure. We also return it zeroed out... |
| */ |
| |
| static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
| { |
| if (!portp) { |
| if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| return -EFAULT; |
| portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| stl_comstats.port); |
| if (portp == NULL) |
| return(-ENODEV); |
| } |
| |
| memset(&portp->stats, 0, sizeof(comstats_t)); |
| portp->stats.brd = portp->brdnr; |
| portp->stats.panel = portp->panelnr; |
| portp->stats.port = portp->portnr; |
| return copy_to_user(cp, &portp->stats, |
| sizeof(comstats_t)) ? -EFAULT : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the entire driver ports structure to a user app. |
| */ |
| |
| static int stl_getportstruct(struct stlport __user *arg) |
| { |
| struct stlport *portp; |
| |
| if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
| return -EFAULT; |
| portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
| stl_dummyport.portnr); |
| if (!portp) |
| return -ENODEV; |
| return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the entire driver board structure to a user app. |
| */ |
| |
| static int stl_getbrdstruct(struct stlbrd __user *arg) |
| { |
| struct stlbrd *brdp; |
| |
| if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
| return -EFAULT; |
| if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
| return -ENODEV; |
| brdp = stl_brds[stl_dummybrd.brdnr]; |
| if (!brdp) |
| return(-ENODEV); |
| return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * The "staliomem" device is also required to do some special operations |
| * on the board and/or ports. In this driver it is mostly used for stats |
| * collection. |
| */ |
| |
| static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
| { |
| int brdnr, rc; |
| void __user *argp = (void __user *)arg; |
| |
| pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg); |
| |
| brdnr = iminor(ip); |
| if (brdnr >= STL_MAXBRDS) |
| return(-ENODEV); |
| rc = 0; |
| |
| switch (cmd) { |
| case COM_GETPORTSTATS: |
| rc = stl_getportstats(NULL, argp); |
| break; |
| case COM_CLRPORTSTATS: |
| rc = stl_clrportstats(NULL, argp); |
| break; |
| case COM_GETBRDSTATS: |
| rc = stl_getbrdstats(argp); |
| break; |
| case COM_READPORT: |
| rc = stl_getportstruct(argp); |
| break; |
| case COM_READBOARD: |
| rc = stl_getbrdstruct(argp); |
| break; |
| default: |
| rc = -ENOIOCTLCMD; |
| break; |
| } |
| |
| return(rc); |
| } |
| |
| static const struct tty_operations stl_ops = { |
| .open = stl_open, |
| .close = stl_close, |
| .write = stl_write, |
| .put_char = stl_putchar, |
| .flush_chars = stl_flushchars, |
| .write_room = stl_writeroom, |
| .chars_in_buffer = stl_charsinbuffer, |
| .ioctl = stl_ioctl, |
| .set_termios = stl_settermios, |
| .throttle = stl_throttle, |
| .unthrottle = stl_unthrottle, |
| .stop = stl_stop, |
| .start = stl_start, |
| .hangup = stl_hangup, |
| .flush_buffer = stl_flushbuffer, |
| .break_ctl = stl_breakctl, |
| .wait_until_sent = stl_waituntilsent, |
| .send_xchar = stl_sendxchar, |
| .read_proc = stl_readproc, |
| .tiocmget = stl_tiocmget, |
| .tiocmset = stl_tiocmset, |
| }; |
| |
| /*****************************************************************************/ |
| /* CD1400 HARDWARE FUNCTIONS */ |
| /*****************************************************************************/ |
| |
| /* |
| * These functions get/set/update the registers of the cd1400 UARTs. |
| * Access to the cd1400 registers is via an address/data io port pair. |
| * (Maybe should make this inline...) |
| */ |
| |
| static int stl_cd1400getreg(struct stlport *portp, int regnr) |
| { |
| outb((regnr + portp->uartaddr), portp->ioaddr); |
| return inb(portp->ioaddr + EREG_DATA); |
| } |
| |
| static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
| { |
| outb((regnr + portp->uartaddr), portp->ioaddr); |
| outb(value, portp->ioaddr + EREG_DATA); |
| } |
| |
| static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
| { |
| outb((regnr + portp->uartaddr), portp->ioaddr); |
| if (inb(portp->ioaddr + EREG_DATA) != value) { |
| outb(value, portp->ioaddr + EREG_DATA); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Inbitialize the UARTs in a panel. We don't care what sort of board |
| * these ports are on - since the port io registers are almost |
| * identical when dealing with ports. |
| */ |
| |
| static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
| { |
| unsigned int gfrcr; |
| int chipmask, i, j; |
| int nrchips, uartaddr, ioaddr; |
| unsigned long flags; |
| |
| pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(panelp->brdnr, panelp->pagenr); |
| |
| /* |
| * Check that each chip is present and started up OK. |
| */ |
| chipmask = 0; |
| nrchips = panelp->nrports / CD1400_PORTS; |
| for (i = 0; (i < nrchips); i++) { |
| if (brdp->brdtype == BRD_ECHPCI) { |
| outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
| ioaddr = panelp->iobase; |
| } else { |
| ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
| } |
| uartaddr = (i & 0x01) ? 0x080 : 0; |
| outb((GFRCR + uartaddr), ioaddr); |
| outb(0, (ioaddr + EREG_DATA)); |
| outb((CCR + uartaddr), ioaddr); |
| outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| outb((GFRCR + uartaddr), ioaddr); |
| for (j = 0; (j < CCR_MAXWAIT); j++) { |
| if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
| break; |
| } |
| if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
| printk("STALLION: cd1400 not responding, " |
| "brd=%d panel=%d chip=%d\n", |
| panelp->brdnr, panelp->panelnr, i); |
| continue; |
| } |
| chipmask |= (0x1 << i); |
| outb((PPR + uartaddr), ioaddr); |
| outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
| } |
| |
| BRDDISABLE(panelp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| return chipmask; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Initialize hardware specific port registers. |
| */ |
| |
| static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
| { |
| unsigned long flags; |
| pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| panelp, portp); |
| |
| if ((brdp == NULL) || (panelp == NULL) || |
| (portp == NULL)) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
| (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
| portp->uartaddr = (portp->portnr & 0x04) << 5; |
| portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
| |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
| portp->hwid = stl_cd1400getreg(portp, GFRCR); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Wait for the command register to be ready. We will poll this, |
| * since it won't usually take too long to be ready. |
| */ |
| |
| static void stl_cd1400ccrwait(struct stlport *portp) |
| { |
| int i; |
| |
| for (i = 0; (i < CCR_MAXWAIT); i++) { |
| if (stl_cd1400getreg(portp, CCR) == 0) { |
| return; |
| } |
| } |
| |
| printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
| portp->portnr, portp->panelnr, portp->brdnr); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Set up the cd1400 registers for a port based on the termios port |
| * settings. |
| */ |
| |
| static void stl_cd1400setport(struct stlport *portp, struct termios *tiosp) |
| { |
| struct stlbrd *brdp; |
| unsigned long flags; |
| unsigned int clkdiv, baudrate; |
| unsigned char cor1, cor2, cor3; |
| unsigned char cor4, cor5, ccr; |
| unsigned char srer, sreron, sreroff; |
| unsigned char mcor1, mcor2, rtpr; |
| unsigned char clk, div; |
| |
| cor1 = 0; |
| cor2 = 0; |
| cor3 = 0; |
| cor4 = 0; |
| cor5 = 0; |
| ccr = 0; |
| rtpr = 0; |
| clk = 0; |
| div = 0; |
| mcor1 = 0; |
| mcor2 = 0; |
| sreron = 0; |
| sreroff = 0; |
| |
| brdp = stl_brds[portp->brdnr]; |
| if (brdp == NULL) |
| return; |
| |
| /* |
| * Set up the RX char ignore mask with those RX error types we |
| * can ignore. We can get the cd1400 to help us out a little here, |
| * it will ignore parity errors and breaks for us. |
| */ |
| portp->rxignoremsk = 0; |
| if (tiosp->c_iflag & IGNPAR) { |
| portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
| cor1 |= COR1_PARIGNORE; |
| } |
| if (tiosp->c_iflag & IGNBRK) { |
| portp->rxignoremsk |= ST_BREAK; |
| cor4 |= COR4_IGNBRK; |
| } |
| |
| portp->rxmarkmsk = ST_OVERRUN; |
| if (tiosp->c_iflag & (INPCK | PARMRK)) |
| portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
| if (tiosp->c_iflag & BRKINT) |
| portp->rxmarkmsk |= ST_BREAK; |
| |
| /* |
| * Go through the char size, parity and stop bits and set all the |
| * option register appropriately. |
| */ |
| switch (tiosp->c_cflag & CSIZE) { |
| case CS5: |
| cor1 |= COR1_CHL5; |
| break; |
| case CS6: |
| cor1 |= COR1_CHL6; |
| break; |
| case CS7: |
| cor1 |= COR1_CHL7; |
| break; |
| default: |
| cor1 |= COR1_CHL8; |
| break; |
| } |
| |
| if (tiosp->c_cflag & CSTOPB) |
| cor1 |= COR1_STOP2; |
| else |
| cor1 |= COR1_STOP1; |
| |
| if (tiosp->c_cflag & PARENB) { |
| if (tiosp->c_cflag & PARODD) |
| cor1 |= (COR1_PARENB | COR1_PARODD); |
| else |
| cor1 |= (COR1_PARENB | COR1_PAREVEN); |
| } else { |
| cor1 |= COR1_PARNONE; |
| } |
| |
| /* |
| * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
| * space for hardware flow control and the like. This should be set to |
| * VMIN. Also here we will set the RX data timeout to 10ms - this should |
| * really be based on VTIME. |
| */ |
| cor3 |= FIFO_RXTHRESHOLD; |
| rtpr = 2; |
| |
| /* |
| * Calculate the baud rate timers. For now we will just assume that |
| * the input and output baud are the same. Could have used a baud |
| * table here, but this way we can generate virtually any baud rate |
| * we like! |
| */ |
| baudrate = tiosp->c_cflag & CBAUD; |
| if (baudrate & CBAUDEX) { |
| baudrate &= ~CBAUDEX; |
| if ((baudrate < 1) || (baudrate > 4)) |
| tiosp->c_cflag &= ~CBAUDEX; |
| else |
| baudrate += 15; |
| } |
| baudrate = stl_baudrates[baudrate]; |
| if ((tiosp->c_cflag & CBAUD) == B38400) { |
| if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| baudrate = 57600; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| baudrate = 115200; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| baudrate = 230400; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| baudrate = 460800; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| baudrate = (portp->baud_base / portp->custom_divisor); |
| } |
| if (baudrate > STL_CD1400MAXBAUD) |
| baudrate = STL_CD1400MAXBAUD; |
| |
| if (baudrate > 0) { |
| for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
| clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
| if (clkdiv < 0x100) |
| break; |
| } |
| div = (unsigned char) clkdiv; |
| } |
| |
| /* |
| * Check what form of modem signaling is required and set it up. |
| */ |
| if ((tiosp->c_cflag & CLOCAL) == 0) { |
| mcor1 |= MCOR1_DCD; |
| mcor2 |= MCOR2_DCD; |
| sreron |= SRER_MODEM; |
| portp->flags |= ASYNC_CHECK_CD; |
| } else { |
| portp->flags &= ~ASYNC_CHECK_CD; |
| } |
| |
| /* |
| * Setup cd1400 enhanced modes if we can. In particular we want to |
| * handle as much of the flow control as possible automatically. As |
| * well as saving a few CPU cycles it will also greatly improve flow |
| * control reliability. |
| */ |
| if (tiosp->c_iflag & IXON) { |
| cor2 |= COR2_TXIBE; |
| cor3 |= COR3_SCD12; |
| if (tiosp->c_iflag & IXANY) |
| cor2 |= COR2_IXM; |
| } |
| |
| if (tiosp->c_cflag & CRTSCTS) { |
| cor2 |= COR2_CTSAE; |
| mcor1 |= FIFO_RTSTHRESHOLD; |
| } |
| |
| /* |
| * All cd1400 register values calculated so go through and set |
| * them all up. |
| */ |
| |
| pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
| portp->portnr, portp->panelnr, portp->brdnr); |
| pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
| cor1, cor2, cor3, cor4, cor5); |
| pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
| mcor1, mcor2, rtpr, sreron, sreroff); |
| pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
| pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
| tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
| srer = stl_cd1400getreg(portp, SRER); |
| stl_cd1400setreg(portp, SRER, 0); |
| if (stl_cd1400updatereg(portp, COR1, cor1)) |
| ccr = 1; |
| if (stl_cd1400updatereg(portp, COR2, cor2)) |
| ccr = 1; |
| if (stl_cd1400updatereg(portp, COR3, cor3)) |
| ccr = 1; |
| if (ccr) { |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
| } |
| stl_cd1400setreg(portp, COR4, cor4); |
| stl_cd1400setreg(portp, COR5, cor5); |
| stl_cd1400setreg(portp, MCOR1, mcor1); |
| stl_cd1400setreg(portp, MCOR2, mcor2); |
| if (baudrate > 0) { |
| stl_cd1400setreg(portp, TCOR, clk); |
| stl_cd1400setreg(portp, TBPR, div); |
| stl_cd1400setreg(portp, RCOR, clk); |
| stl_cd1400setreg(portp, RBPR, div); |
| } |
| stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
| stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
| stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
| stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
| stl_cd1400setreg(portp, RTPR, rtpr); |
| mcor1 = stl_cd1400getreg(portp, MSVR1); |
| if (mcor1 & MSVR1_DCD) |
| portp->sigs |= TIOCM_CD; |
| else |
| portp->sigs &= ~TIOCM_CD; |
| stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Set the state of the DTR and RTS signals. |
| */ |
| |
| static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
| { |
| unsigned char msvr1, msvr2; |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
| portp, dtr, rts); |
| |
| msvr1 = 0; |
| msvr2 = 0; |
| if (dtr > 0) |
| msvr1 = MSVR1_DTR; |
| if (rts > 0) |
| msvr2 = MSVR2_RTS; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| if (rts >= 0) |
| stl_cd1400setreg(portp, MSVR2, msvr2); |
| if (dtr >= 0) |
| stl_cd1400setreg(portp, MSVR1, msvr1); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the state of the signals. |
| */ |
| |
| static int stl_cd1400getsignals(struct stlport *portp) |
| { |
| unsigned char msvr1, msvr2; |
| unsigned long flags; |
| int sigs; |
| |
| pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| msvr1 = stl_cd1400getreg(portp, MSVR1); |
| msvr2 = stl_cd1400getreg(portp, MSVR2); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| |
| sigs = 0; |
| sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
| sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
| sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
| sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
| #if 0 |
| sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
| sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
| #else |
| sigs |= TIOCM_DSR; |
| #endif |
| return sigs; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Enable/Disable the Transmitter and/or Receiver. |
| */ |
| |
| static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
| { |
| unsigned char ccr; |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| |
| ccr = 0; |
| |
| if (tx == 0) |
| ccr |= CCR_TXDISABLE; |
| else if (tx > 0) |
| ccr |= CCR_TXENABLE; |
| if (rx == 0) |
| ccr |= CCR_RXDISABLE; |
| else if (rx > 0) |
| ccr |= CCR_RXENABLE; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, ccr); |
| stl_cd1400ccrwait(portp); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Start/stop the Transmitter and/or Receiver. |
| */ |
| |
| static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
| { |
| unsigned char sreron, sreroff; |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| |
| sreron = 0; |
| sreroff = 0; |
| if (tx == 0) |
| sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
| else if (tx == 1) |
| sreron |= SRER_TXDATA; |
| else if (tx >= 2) |
| sreron |= SRER_TXEMPTY; |
| if (rx == 0) |
| sreroff |= SRER_RXDATA; |
| else if (rx > 0) |
| sreron |= SRER_RXDATA; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400setreg(portp, SRER, |
| ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
| BRDDISABLE(portp->brdnr); |
| if (tx > 0) |
| set_bit(ASYI_TXBUSY, &portp->istate); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Disable all interrupts from this port. |
| */ |
| |
| static void stl_cd1400disableintrs(struct stlport *portp) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400setreg(portp, SRER, 0); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_cd1400sendbreak(struct stlport *portp, int len) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400setreg(portp, SRER, |
| ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
| SRER_TXEMPTY)); |
| BRDDISABLE(portp->brdnr); |
| portp->brklen = len; |
| if (len == 1) |
| portp->stats.txbreaks++; |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Take flow control actions... |
| */ |
| |
| static void stl_cd1400flowctrl(struct stlport *portp, int state) |
| { |
| struct tty_struct *tty; |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
| |
| if (portp == NULL) |
| return; |
| tty = portp->tty; |
| if (tty == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| |
| if (state) { |
| if (tty->termios->c_iflag & IXOFF) { |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| portp->stats.rxxon++; |
| stl_cd1400ccrwait(portp); |
| } |
| /* |
| * Question: should we return RTS to what it was before? It may |
| * have been set by an ioctl... Suppose not, since if you have |
| * hardware flow control set then it is pretty silly to go and |
| * set the RTS line by hand. |
| */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| stl_cd1400setreg(portp, MCOR1, |
| (stl_cd1400getreg(portp, MCOR1) | |
| FIFO_RTSTHRESHOLD)); |
| stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
| portp->stats.rxrtson++; |
| } |
| } else { |
| if (tty->termios->c_iflag & IXOFF) { |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| portp->stats.rxxoff++; |
| stl_cd1400ccrwait(portp); |
| } |
| if (tty->termios->c_cflag & CRTSCTS) { |
| stl_cd1400setreg(portp, MCOR1, |
| (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
| stl_cd1400setreg(portp, MSVR2, 0); |
| portp->stats.rxrtsoff++; |
| } |
| } |
| |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Send a flow control character... |
| */ |
| |
| static void stl_cd1400sendflow(struct stlport *portp, int state) |
| { |
| struct tty_struct *tty; |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
| |
| if (portp == NULL) |
| return; |
| tty = portp->tty; |
| if (tty == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| if (state) { |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| portp->stats.rxxon++; |
| stl_cd1400ccrwait(portp); |
| } else { |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| portp->stats.rxxoff++; |
| stl_cd1400ccrwait(portp); |
| } |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_cd1400flush(struct stlport *portp) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| stl_cd1400ccrwait(portp); |
| stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
| stl_cd1400ccrwait(portp); |
| portp->tx.tail = portp->tx.head; |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the current state of data flow on this port. This is only |
| * really interresting when determining if data has fully completed |
| * transmission or not... This is easy for the cd1400, it accurately |
| * maintains the busy port flag. |
| */ |
| |
| static int stl_cd1400datastate(struct stlport *portp) |
| { |
| pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return 0; |
| |
| return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Interrupt service routine for cd1400 EasyIO boards. |
| */ |
| |
| static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
| { |
| unsigned char svrtype; |
| |
| pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
| |
| spin_lock(&brd_lock); |
| outb(SVRR, iobase); |
| svrtype = inb(iobase + EREG_DATA); |
| if (panelp->nrports > 4) { |
| outb((SVRR + 0x80), iobase); |
| svrtype |= inb(iobase + EREG_DATA); |
| } |
| |
| if (svrtype & SVRR_RX) |
| stl_cd1400rxisr(panelp, iobase); |
| else if (svrtype & SVRR_TX) |
| stl_cd1400txisr(panelp, iobase); |
| else if (svrtype & SVRR_MDM) |
| stl_cd1400mdmisr(panelp, iobase); |
| |
| spin_unlock(&brd_lock); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Interrupt service routine for cd1400 panels. |
| */ |
| |
| static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
| { |
| unsigned char svrtype; |
| |
| pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
| |
| outb(SVRR, iobase); |
| svrtype = inb(iobase + EREG_DATA); |
| outb((SVRR + 0x80), iobase); |
| svrtype |= inb(iobase + EREG_DATA); |
| if (svrtype & SVRR_RX) |
| stl_cd1400rxisr(panelp, iobase); |
| else if (svrtype & SVRR_TX) |
| stl_cd1400txisr(panelp, iobase); |
| else if (svrtype & SVRR_MDM) |
| stl_cd1400mdmisr(panelp, iobase); |
| } |
| |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Unfortunately we need to handle breaks in the TX data stream, since |
| * this is the only way to generate them on the cd1400. |
| */ |
| |
| static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
| { |
| if (portp->brklen == 1) { |
| outb((COR2 + portp->uartaddr), ioaddr); |
| outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
| (ioaddr + EREG_DATA)); |
| outb((TDR + portp->uartaddr), ioaddr); |
| outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
| outb((SRER + portp->uartaddr), ioaddr); |
| outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
| (ioaddr + EREG_DATA)); |
| return 1; |
| } else if (portp->brklen > 1) { |
| outb((TDR + portp->uartaddr), ioaddr); |
| outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
| portp->brklen = -1; |
| return 1; |
| } else { |
| outb((COR2 + portp->uartaddr), ioaddr); |
| outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
| (ioaddr + EREG_DATA)); |
| portp->brklen = 0; |
| } |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Transmit interrupt handler. This has gotta be fast! Handling TX |
| * chars is pretty simple, stuff as many as possible from the TX buffer |
| * into the cd1400 FIFO. Must also handle TX breaks here, since they |
| * are embedded as commands in the data stream. Oh no, had to use a goto! |
| * This could be optimized more, will do when I get time... |
| * In practice it is possible that interrupts are enabled but that the |
| * port has been hung up. Need to handle not having any TX buffer here, |
| * this is done by using the side effect that head and tail will also |
| * be NULL if the buffer has been freed. |
| */ |
| |
| static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
| { |
| struct stlport *portp; |
| int len, stlen; |
| char *head, *tail; |
| unsigned char ioack, srer; |
| |
| pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
| |
| ioack = inb(ioaddr + EREG_TXACK); |
| if (((ioack & panelp->ackmask) != 0) || |
| ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
| printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
| return; |
| } |
| portp = panelp->ports[(ioack >> 3)]; |
| |
| /* |
| * Unfortunately we need to handle breaks in the data stream, since |
| * this is the only way to generate them on the cd1400. Do it now if |
| * a break is to be sent. |
| */ |
| if (portp->brklen != 0) |
| if (stl_cd1400breakisr(portp, ioaddr)) |
| goto stl_txalldone; |
| |
| head = portp->tx.head; |
| tail = portp->tx.tail; |
| len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| if ((len == 0) || ((len < STL_TXBUFLOW) && |
| (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| set_bit(ASYI_TXLOW, &portp->istate); |
| schedule_work(&portp->tqueue); |
| } |
| |
| if (len == 0) { |
| outb((SRER + portp->uartaddr), ioaddr); |
| srer = inb(ioaddr + EREG_DATA); |
| if (srer & SRER_TXDATA) { |
| srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
| } else { |
| srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
| clear_bit(ASYI_TXBUSY, &portp->istate); |
| } |
| outb(srer, (ioaddr + EREG_DATA)); |
| } else { |
| len = MIN(len, CD1400_TXFIFOSIZE); |
| portp->stats.txtotal += len; |
| stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| outb((TDR + portp->uartaddr), ioaddr); |
| outsb((ioaddr + EREG_DATA), tail, stlen); |
| len -= stlen; |
| tail += stlen; |
| if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| tail = portp->tx.buf; |
| if (len > 0) { |
| outsb((ioaddr + EREG_DATA), tail, len); |
| tail += len; |
| } |
| portp->tx.tail = tail; |
| } |
| |
| stl_txalldone: |
| outb((EOSRR + portp->uartaddr), ioaddr); |
| outb(0, (ioaddr + EREG_DATA)); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Receive character interrupt handler. Determine if we have good chars |
| * or bad chars and then process appropriately. Good chars are easy |
| * just shove the lot into the RX buffer and set all status byte to 0. |
| * If a bad RX char then process as required. This routine needs to be |
| * fast! In practice it is possible that we get an interrupt on a port |
| * that is closed. This can happen on hangups - since they completely |
| * shutdown a port not in user context. Need to handle this case. |
| */ |
| |
| static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
| { |
| struct stlport *portp; |
| struct tty_struct *tty; |
| unsigned int ioack, len, buflen; |
| unsigned char status; |
| char ch; |
| |
| pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
| |
| ioack = inb(ioaddr + EREG_RXACK); |
| if ((ioack & panelp->ackmask) != 0) { |
| printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| return; |
| } |
| portp = panelp->ports[(ioack >> 3)]; |
| tty = portp->tty; |
| |
| if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
| outb((RDCR + portp->uartaddr), ioaddr); |
| len = inb(ioaddr + EREG_DATA); |
| if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
| len = MIN(len, sizeof(stl_unwanted)); |
| outb((RDSR + portp->uartaddr), ioaddr); |
| insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
| portp->stats.rxlost += len; |
| portp->stats.rxtotal += len; |
| } else { |
| len = MIN(len, buflen); |
| if (len > 0) { |
| unsigned char *ptr; |
| outb((RDSR + portp->uartaddr), ioaddr); |
| tty_prepare_flip_string(tty, &ptr, len); |
| insb((ioaddr + EREG_DATA), ptr, len); |
| tty_schedule_flip(tty); |
| portp->stats.rxtotal += len; |
| } |
| } |
| } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
| outb((RDSR + portp->uartaddr), ioaddr); |
| status = inb(ioaddr + EREG_DATA); |
| ch = inb(ioaddr + EREG_DATA); |
| if (status & ST_PARITY) |
| portp->stats.rxparity++; |
| if (status & ST_FRAMING) |
| portp->stats.rxframing++; |
| if (status & ST_OVERRUN) |
| portp->stats.rxoverrun++; |
| if (status & ST_BREAK) |
| portp->stats.rxbreaks++; |
| if (status & ST_SCHARMASK) { |
| if ((status & ST_SCHARMASK) == ST_SCHAR1) |
| portp->stats.txxon++; |
| if ((status & ST_SCHARMASK) == ST_SCHAR2) |
| portp->stats.txxoff++; |
| goto stl_rxalldone; |
| } |
| if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
| if (portp->rxmarkmsk & status) { |
| if (status & ST_BREAK) { |
| status = TTY_BREAK; |
| if (portp->flags & ASYNC_SAK) { |
| do_SAK(tty); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| } |
| } else if (status & ST_PARITY) { |
| status = TTY_PARITY; |
| } else if (status & ST_FRAMING) { |
| status = TTY_FRAME; |
| } else if(status & ST_OVERRUN) { |
| status = TTY_OVERRUN; |
| } else { |
| status = 0; |
| } |
| } else { |
| status = 0; |
| } |
| tty_insert_flip_char(tty, ch, status); |
| tty_schedule_flip(tty); |
| } |
| } else { |
| printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| return; |
| } |
| |
| stl_rxalldone: |
| outb((EOSRR + portp->uartaddr), ioaddr); |
| outb(0, (ioaddr + EREG_DATA)); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Modem interrupt handler. The is called when the modem signal line |
| * (DCD) has changed state. Leave most of the work to the off-level |
| * processing routine. |
| */ |
| |
| static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
| { |
| struct stlport *portp; |
| unsigned int ioack; |
| unsigned char misr; |
| |
| pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
| |
| ioack = inb(ioaddr + EREG_MDACK); |
| if (((ioack & panelp->ackmask) != 0) || |
| ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
| printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
| return; |
| } |
| portp = panelp->ports[(ioack >> 3)]; |
| |
| outb((MISR + portp->uartaddr), ioaddr); |
| misr = inb(ioaddr + EREG_DATA); |
| if (misr & MISR_DCD) { |
| set_bit(ASYI_DCDCHANGE, &portp->istate); |
| schedule_work(&portp->tqueue); |
| portp->stats.modem++; |
| } |
| |
| outb((EOSRR + portp->uartaddr), ioaddr); |
| outb(0, (ioaddr + EREG_DATA)); |
| } |
| |
| /*****************************************************************************/ |
| /* SC26198 HARDWARE FUNCTIONS */ |
| /*****************************************************************************/ |
| |
| /* |
| * These functions get/set/update the registers of the sc26198 UARTs. |
| * Access to the sc26198 registers is via an address/data io port pair. |
| * (Maybe should make this inline...) |
| */ |
| |
| static int stl_sc26198getreg(struct stlport *portp, int regnr) |
| { |
| outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| return inb(portp->ioaddr + XP_DATA); |
| } |
| |
| static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
| { |
| outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| outb(value, (portp->ioaddr + XP_DATA)); |
| } |
| |
| static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
| { |
| outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| if (inb(portp->ioaddr + XP_DATA) != value) { |
| outb(value, (portp->ioaddr + XP_DATA)); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Functions to get and set the sc26198 global registers. |
| */ |
| |
| static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
| { |
| outb(regnr, (portp->ioaddr + XP_ADDR)); |
| return inb(portp->ioaddr + XP_DATA); |
| } |
| |
| #if 0 |
| static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
| { |
| outb(regnr, (portp->ioaddr + XP_ADDR)); |
| outb(value, (portp->ioaddr + XP_DATA)); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Inbitialize the UARTs in a panel. We don't care what sort of board |
| * these ports are on - since the port io registers are almost |
| * identical when dealing with ports. |
| */ |
| |
| static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
| { |
| int chipmask, i; |
| int nrchips, ioaddr; |
| |
| pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
| |
| BRDENABLE(panelp->brdnr, panelp->pagenr); |
| |
| /* |
| * Check that each chip is present and started up OK. |
| */ |
| chipmask = 0; |
| nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
| if (brdp->brdtype == BRD_ECHPCI) |
| outb(panelp->pagenr, brdp->ioctrl); |
| |
| for (i = 0; (i < nrchips); i++) { |
| ioaddr = panelp->iobase + (i * 4); |
| outb(SCCR, (ioaddr + XP_ADDR)); |
| outb(CR_RESETALL, (ioaddr + XP_DATA)); |
| outb(TSTR, (ioaddr + XP_ADDR)); |
| if (inb(ioaddr + XP_DATA) != 0) { |
| printk("STALLION: sc26198 not responding, " |
| "brd=%d panel=%d chip=%d\n", |
| panelp->brdnr, panelp->panelnr, i); |
| continue; |
| } |
| chipmask |= (0x1 << i); |
| outb(GCCR, (ioaddr + XP_ADDR)); |
| outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
| outb(WDTRCR, (ioaddr + XP_ADDR)); |
| outb(0xff, (ioaddr + XP_DATA)); |
| } |
| |
| BRDDISABLE(panelp->brdnr); |
| return chipmask; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Initialize hardware specific port registers. |
| */ |
| |
| static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
| { |
| pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| panelp, portp); |
| |
| if ((brdp == NULL) || (panelp == NULL) || |
| (portp == NULL)) |
| return; |
| |
| portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
| portp->uartaddr = (portp->portnr & 0x07) << 4; |
| portp->pagenr = panelp->pagenr; |
| portp->hwid = 0x1; |
| |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
| BRDDISABLE(portp->brdnr); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Set up the sc26198 registers for a port based on the termios port |
| * settings. |
| */ |
| |
| static void stl_sc26198setport(struct stlport *portp, struct termios *tiosp) |
| { |
| struct stlbrd *brdp; |
| unsigned long flags; |
| unsigned int baudrate; |
| unsigned char mr0, mr1, mr2, clk; |
| unsigned char imron, imroff, iopr, ipr; |
| |
| mr0 = 0; |
| mr1 = 0; |
| mr2 = 0; |
| clk = 0; |
| iopr = 0; |
| imron = 0; |
| imroff = 0; |
| |
| brdp = stl_brds[portp->brdnr]; |
| if (brdp == NULL) |
| return; |
| |
| /* |
| * Set up the RX char ignore mask with those RX error types we |
| * can ignore. |
| */ |
| portp->rxignoremsk = 0; |
| if (tiosp->c_iflag & IGNPAR) |
| portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
| SR_RXOVERRUN); |
| if (tiosp->c_iflag & IGNBRK) |
| portp->rxignoremsk |= SR_RXBREAK; |
| |
| portp->rxmarkmsk = SR_RXOVERRUN; |
| if (tiosp->c_iflag & (INPCK | PARMRK)) |
| portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
| if (tiosp->c_iflag & BRKINT) |
| portp->rxmarkmsk |= SR_RXBREAK; |
| |
| /* |
| * Go through the char size, parity and stop bits and set all the |
| * option register appropriately. |
| */ |
| switch (tiosp->c_cflag & CSIZE) { |
| case CS5: |
| mr1 |= MR1_CS5; |
| break; |
| case CS6: |
| mr1 |= MR1_CS6; |
| break; |
| case CS7: |
| mr1 |= MR1_CS7; |
| break; |
| default: |
| mr1 |= MR1_CS8; |
| break; |
| } |
| |
| if (tiosp->c_cflag & CSTOPB) |
| mr2 |= MR2_STOP2; |
| else |
| mr2 |= MR2_STOP1; |
| |
| if (tiosp->c_cflag & PARENB) { |
| if (tiosp->c_cflag & PARODD) |
| mr1 |= (MR1_PARENB | MR1_PARODD); |
| else |
| mr1 |= (MR1_PARENB | MR1_PAREVEN); |
| } else { |
| mr1 |= MR1_PARNONE; |
| } |
| |
| mr1 |= MR1_ERRBLOCK; |
| |
| /* |
| * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
| * space for hardware flow control and the like. This should be set to |
| * VMIN. |
| */ |
| mr2 |= MR2_RXFIFOHALF; |
| |
| /* |
| * Calculate the baud rate timers. For now we will just assume that |
| * the input and output baud are the same. The sc26198 has a fixed |
| * baud rate table, so only discrete baud rates possible. |
| */ |
| baudrate = tiosp->c_cflag & CBAUD; |
| if (baudrate & CBAUDEX) { |
| baudrate &= ~CBAUDEX; |
| if ((baudrate < 1) || (baudrate > 4)) |
| tiosp->c_cflag &= ~CBAUDEX; |
| else |
| baudrate += 15; |
| } |
| baudrate = stl_baudrates[baudrate]; |
| if ((tiosp->c_cflag & CBAUD) == B38400) { |
| if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| baudrate = 57600; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| baudrate = 115200; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| baudrate = 230400; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| baudrate = 460800; |
| else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| baudrate = (portp->baud_base / portp->custom_divisor); |
| } |
| if (baudrate > STL_SC26198MAXBAUD) |
| baudrate = STL_SC26198MAXBAUD; |
| |
| if (baudrate > 0) { |
| for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
| if (baudrate <= sc26198_baudtable[clk]) |
| break; |
| } |
| } |
| |
| /* |
| * Check what form of modem signaling is required and set it up. |
| */ |
| if (tiosp->c_cflag & CLOCAL) { |
| portp->flags &= ~ASYNC_CHECK_CD; |
| } else { |
| iopr |= IOPR_DCDCOS; |
| imron |= IR_IOPORT; |
| portp->flags |= ASYNC_CHECK_CD; |
| } |
| |
| /* |
| * Setup sc26198 enhanced modes if we can. In particular we want to |
| * handle as much of the flow control as possible automatically. As |
| * well as saving a few CPU cycles it will also greatly improve flow |
| * control reliability. |
| */ |
| if (tiosp->c_iflag & IXON) { |
| mr0 |= MR0_SWFTX | MR0_SWFT; |
| imron |= IR_XONXOFF; |
| } else { |
| imroff |= IR_XONXOFF; |
| } |
| if (tiosp->c_iflag & IXOFF) |
| mr0 |= MR0_SWFRX; |
| |
| if (tiosp->c_cflag & CRTSCTS) { |
| mr2 |= MR2_AUTOCTS; |
| mr1 |= MR1_AUTORTS; |
| } |
| |
| /* |
| * All sc26198 register values calculated so go through and set |
| * them all up. |
| */ |
| |
| pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
| portp->portnr, portp->panelnr, portp->brdnr); |
| pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
| pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
| pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
| tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, IMR, 0); |
| stl_sc26198updatereg(portp, MR0, mr0); |
| stl_sc26198updatereg(portp, MR1, mr1); |
| stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
| stl_sc26198updatereg(portp, MR2, mr2); |
| stl_sc26198updatereg(portp, IOPIOR, |
| ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
| |
| if (baudrate > 0) { |
| stl_sc26198setreg(portp, TXCSR, clk); |
| stl_sc26198setreg(portp, RXCSR, clk); |
| } |
| |
| stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
| stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
| |
| ipr = stl_sc26198getreg(portp, IPR); |
| if (ipr & IPR_DCD) |
| portp->sigs &= ~TIOCM_CD; |
| else |
| portp->sigs |= TIOCM_CD; |
| |
| portp->imr = (portp->imr & ~imroff) | imron; |
| stl_sc26198setreg(portp, IMR, portp->imr); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Set the state of the DTR and RTS signals. |
| */ |
| |
| static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
| { |
| unsigned char iopioron, iopioroff; |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
| dtr, rts); |
| |
| iopioron = 0; |
| iopioroff = 0; |
| if (dtr == 0) |
| iopioroff |= IPR_DTR; |
| else if (dtr > 0) |
| iopioron |= IPR_DTR; |
| if (rts == 0) |
| iopioroff |= IPR_RTS; |
| else if (rts > 0) |
| iopioron |= IPR_RTS; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, IOPIOR, |
| ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the state of the signals. |
| */ |
| |
| static int stl_sc26198getsignals(struct stlport *portp) |
| { |
| unsigned char ipr; |
| unsigned long flags; |
| int sigs; |
| |
| pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| ipr = stl_sc26198getreg(portp, IPR); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| |
| sigs = 0; |
| sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
| sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
| sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
| sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
| sigs |= TIOCM_DSR; |
| return sigs; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Enable/Disable the Transmitter and/or Receiver. |
| */ |
| |
| static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
| { |
| unsigned char ccr; |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx); |
| |
| ccr = portp->crenable; |
| if (tx == 0) |
| ccr &= ~CR_TXENABLE; |
| else if (tx > 0) |
| ccr |= CR_TXENABLE; |
| if (rx == 0) |
| ccr &= ~CR_RXENABLE; |
| else if (rx > 0) |
| ccr |= CR_RXENABLE; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, SCCR, ccr); |
| BRDDISABLE(portp->brdnr); |
| portp->crenable = ccr; |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Start/stop the Transmitter and/or Receiver. |
| */ |
| |
| static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
| { |
| unsigned char imr; |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| |
| imr = portp->imr; |
| if (tx == 0) |
| imr &= ~IR_TXRDY; |
| else if (tx == 1) |
| imr |= IR_TXRDY; |
| if (rx == 0) |
| imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
| else if (rx > 0) |
| imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, IMR, imr); |
| BRDDISABLE(portp->brdnr); |
| portp->imr = imr; |
| if (tx > 0) |
| set_bit(ASYI_TXBUSY, &portp->istate); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Disable all interrupts from this port. |
| */ |
| |
| static void stl_sc26198disableintrs(struct stlport *portp) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| portp->imr = 0; |
| stl_sc26198setreg(portp, IMR, 0); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_sc26198sendbreak(struct stlport *portp, int len) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| if (len == 1) { |
| stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
| portp->stats.txbreaks++; |
| } else { |
| stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
| } |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Take flow control actions... |
| */ |
| |
| static void stl_sc26198flowctrl(struct stlport *portp, int state) |
| { |
| struct tty_struct *tty; |
| unsigned long flags; |
| unsigned char mr0; |
| |
| pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
| |
| if (portp == NULL) |
| return; |
| tty = portp->tty; |
| if (tty == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| |
| if (state) { |
| if (tty->termios->c_iflag & IXOFF) { |
| mr0 = stl_sc26198getreg(portp, MR0); |
| stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| mr0 |= MR0_SWFRX; |
| portp->stats.rxxon++; |
| stl_sc26198wait(portp); |
| stl_sc26198setreg(portp, MR0, mr0); |
| } |
| /* |
| * Question: should we return RTS to what it was before? It may |
| * have been set by an ioctl... Suppose not, since if you have |
| * hardware flow control set then it is pretty silly to go and |
| * set the RTS line by hand. |
| */ |
| if (tty->termios->c_cflag & CRTSCTS) { |
| stl_sc26198setreg(portp, MR1, |
| (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
| stl_sc26198setreg(portp, IOPIOR, |
| (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
| portp->stats.rxrtson++; |
| } |
| } else { |
| if (tty->termios->c_iflag & IXOFF) { |
| mr0 = stl_sc26198getreg(portp, MR0); |
| stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| mr0 &= ~MR0_SWFRX; |
| portp->stats.rxxoff++; |
| stl_sc26198wait(portp); |
| stl_sc26198setreg(portp, MR0, mr0); |
| } |
| if (tty->termios->c_cflag & CRTSCTS) { |
| stl_sc26198setreg(portp, MR1, |
| (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
| stl_sc26198setreg(portp, IOPIOR, |
| (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
| portp->stats.rxrtsoff++; |
| } |
| } |
| |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Send a flow control character. |
| */ |
| |
| static void stl_sc26198sendflow(struct stlport *portp, int state) |
| { |
| struct tty_struct *tty; |
| unsigned long flags; |
| unsigned char mr0; |
| |
| pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
| |
| if (portp == NULL) |
| return; |
| tty = portp->tty; |
| if (tty == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| if (state) { |
| mr0 = stl_sc26198getreg(portp, MR0); |
| stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| mr0 |= MR0_SWFRX; |
| portp->stats.rxxon++; |
| stl_sc26198wait(portp); |
| stl_sc26198setreg(portp, MR0, mr0); |
| } else { |
| mr0 = stl_sc26198getreg(portp, MR0); |
| stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| mr0 &= ~MR0_SWFRX; |
| portp->stats.rxxoff++; |
| stl_sc26198wait(portp); |
| stl_sc26198setreg(portp, MR0, mr0); |
| } |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| static void stl_sc26198flush(struct stlport *portp) |
| { |
| unsigned long flags; |
| |
| pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
| stl_sc26198setreg(portp, SCCR, portp->crenable); |
| BRDDISABLE(portp->brdnr); |
| portp->tx.tail = portp->tx.head; |
| spin_unlock_irqrestore(&brd_lock, flags); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Return the current state of data flow on this port. This is only |
| * really interresting when determining if data has fully completed |
| * transmission or not... The sc26198 interrupt scheme cannot |
| * determine when all data has actually drained, so we need to |
| * check the port statusy register to be sure. |
| */ |
| |
| static int stl_sc26198datastate(struct stlport *portp) |
| { |
| unsigned long flags; |
| unsigned char sr; |
| |
| pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return 0; |
| if (test_bit(ASYI_TXBUSY, &portp->istate)) |
| return 1; |
| |
| spin_lock_irqsave(&brd_lock, flags); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| sr = stl_sc26198getreg(portp, SR); |
| BRDDISABLE(portp->brdnr); |
| spin_unlock_irqrestore(&brd_lock, flags); |
| |
| return (sr & SR_TXEMPTY) ? 0 : 1; |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Delay for a small amount of time, to give the sc26198 a chance |
| * to process a command... |
| */ |
| |
| static void stl_sc26198wait(struct stlport *portp) |
| { |
| int i; |
| |
| pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
| |
| if (portp == NULL) |
| return; |
| |
| for (i = 0; (i < 20); i++) |
| stl_sc26198getglobreg(portp, TSTR); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * If we are TX flow controlled and in IXANY mode then we may |
| * need to unflow control here. We gotta do this because of the |
| * automatic flow control modes of the sc26198. |
| */ |
| |
| static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
| { |
| unsigned char mr0; |
| |
| mr0 = stl_sc26198getreg(portp, MR0); |
| stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
| stl_sc26198wait(portp); |
| stl_sc26198setreg(portp, MR0, mr0); |
| clear_bit(ASYI_TXFLOWED, &portp->istate); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Interrupt service routine for sc26198 panels. |
| */ |
| |
| static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
| { |
| struct stlport *portp; |
| unsigned int iack; |
| |
| spin_lock(&brd_lock); |
| |
| /* |
| * Work around bug in sc26198 chip... Cannot have A6 address |
| * line of UART high, else iack will be returned as 0. |
| */ |
| outb(0, (iobase + 1)); |
| |
| iack = inb(iobase + XP_IACK); |
| portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
| |
| if (iack & IVR_RXDATA) |
| stl_sc26198rxisr(portp, iack); |
| else if (iack & IVR_TXDATA) |
| stl_sc26198txisr(portp); |
| else |
| stl_sc26198otherisr(portp, iack); |
| |
| spin_unlock(&brd_lock); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Transmit interrupt handler. This has gotta be fast! Handling TX |
| * chars is pretty simple, stuff as many as possible from the TX buffer |
| * into the sc26198 FIFO. |
| * In practice it is possible that interrupts are enabled but that the |
| * port has been hung up. Need to handle not having any TX buffer here, |
| * this is done by using the side effect that head and tail will also |
| * be NULL if the buffer has been freed. |
| */ |
| |
| static void stl_sc26198txisr(struct stlport *portp) |
| { |
| unsigned int ioaddr; |
| unsigned char mr0; |
| int len, stlen; |
| char *head, *tail; |
| |
| pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
| |
| ioaddr = portp->ioaddr; |
| head = portp->tx.head; |
| tail = portp->tx.tail; |
| len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| if ((len == 0) || ((len < STL_TXBUFLOW) && |
| (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| set_bit(ASYI_TXLOW, &portp->istate); |
| schedule_work(&portp->tqueue); |
| } |
| |
| if (len == 0) { |
| outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
| mr0 = inb(ioaddr + XP_DATA); |
| if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
| portp->imr &= ~IR_TXRDY; |
| outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
| outb(portp->imr, (ioaddr + XP_DATA)); |
| clear_bit(ASYI_TXBUSY, &portp->istate); |
| } else { |
| mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
| outb(mr0, (ioaddr + XP_DATA)); |
| } |
| } else { |
| len = MIN(len, SC26198_TXFIFOSIZE); |
| portp->stats.txtotal += len; |
| stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| outb(GTXFIFO, (ioaddr + XP_ADDR)); |
| outsb((ioaddr + XP_DATA), tail, stlen); |
| len -= stlen; |
| tail += stlen; |
| if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| tail = portp->tx.buf; |
| if (len > 0) { |
| outsb((ioaddr + XP_DATA), tail, len); |
| tail += len; |
| } |
| portp->tx.tail = tail; |
| } |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Receive character interrupt handler. Determine if we have good chars |
| * or bad chars and then process appropriately. Good chars are easy |
| * just shove the lot into the RX buffer and set all status byte to 0. |
| * If a bad RX char then process as required. This routine needs to be |
| * fast! In practice it is possible that we get an interrupt on a port |
| * that is closed. This can happen on hangups - since they completely |
| * shutdown a port not in user context. Need to handle this case. |
| */ |
| |
| static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
| { |
| struct tty_struct *tty; |
| unsigned int len, buflen, ioaddr; |
| |
| pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
| |
| tty = portp->tty; |
| ioaddr = portp->ioaddr; |
| outb(GIBCR, (ioaddr + XP_ADDR)); |
| len = inb(ioaddr + XP_DATA) + 1; |
| |
| if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
| if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
| len = MIN(len, sizeof(stl_unwanted)); |
| outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
| portp->stats.rxlost += len; |
| portp->stats.rxtotal += len; |
| } else { |
| len = MIN(len, buflen); |
| if (len > 0) { |
| unsigned char *ptr; |
| outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| tty_prepare_flip_string(tty, &ptr, len); |
| insb((ioaddr + XP_DATA), ptr, len); |
| tty_schedule_flip(tty); |
| portp->stats.rxtotal += len; |
| } |
| } |
| } else { |
| stl_sc26198rxbadchars(portp); |
| } |
| |
| /* |
| * If we are TX flow controlled and in IXANY mode then we may need |
| * to unflow control here. We gotta do this because of the automatic |
| * flow control modes of the sc26198. |
| */ |
| if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
| if ((tty != NULL) && |
| (tty->termios != NULL) && |
| (tty->termios->c_iflag & IXANY)) { |
| stl_sc26198txunflow(portp, tty); |
| } |
| } |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Process an RX bad character. |
| */ |
| |
| static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
| { |
| struct tty_struct *tty; |
| unsigned int ioaddr; |
| |
| tty = portp->tty; |
| ioaddr = portp->ioaddr; |
| |
| if (status & SR_RXPARITY) |
| portp->stats.rxparity++; |
| if (status & SR_RXFRAMING) |
| portp->stats.rxframing++; |
| if (status & SR_RXOVERRUN) |
| portp->stats.rxoverrun++; |
| if (status & SR_RXBREAK) |
| portp->stats.rxbreaks++; |
| |
| if ((tty != NULL) && |
| ((portp->rxignoremsk & status) == 0)) { |
| if (portp->rxmarkmsk & status) { |
| if (status & SR_RXBREAK) { |
| status = TTY_BREAK; |
| if (portp->flags & ASYNC_SAK) { |
| do_SAK(tty); |
| BRDENABLE(portp->brdnr, portp->pagenr); |
| } |
| } else if (status & SR_RXPARITY) { |
| status = TTY_PARITY; |
| } else if (status & SR_RXFRAMING) { |
| status = TTY_FRAME; |
| } else if(status & SR_RXOVERRUN) { |
| status = TTY_OVERRUN; |
| } else { |
| status = 0; |
| } |
| } else { |
| status = 0; |
| } |
| |
| tty_insert_flip_char(tty, ch, status); |
| tty_schedule_flip(tty); |
| |
| if (status == 0) |
| portp->stats.rxtotal++; |
| } |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Process all characters in the RX FIFO of the UART. Check all char |
| * status bytes as well, and process as required. We need to check |
| * all bytes in the FIFO, in case some more enter the FIFO while we |
| * are here. To get the exact character error type we need to switch |
| * into CHAR error mode (that is why we need to make sure we empty |
| * the FIFO). |
| */ |
| |
| static void stl_sc26198rxbadchars(struct stlport *portp) |
| { |
| unsigned char status, mr1; |
| char ch; |
| |
| /* |
| * To get the precise error type for each character we must switch |
| * back into CHAR error mode. |
| */ |
| mr1 = stl_sc26198getreg(portp, MR1); |
| stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
| |
| while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
| stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
| ch = stl_sc26198getreg(portp, RXFIFO); |
| stl_sc26198rxbadch(portp, status, ch); |
| } |
| |
| /* |
| * To get correct interrupt class we must switch back into BLOCK |
| * error mode. |
| */ |
| stl_sc26198setreg(portp, MR1, mr1); |
| } |
| |
| /*****************************************************************************/ |
| |
| /* |
| * Other interrupt handler. This includes modem signals, flow |
| * control actions, etc. Most stuff is left to off-level interrupt |
| * processing time. |
| */ |
| |
| static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
| { |
| unsigned char cir, ipr, xisr; |
| |
| pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
| |
| cir = stl_sc26198getglobreg(portp, CIR); |
| |
| switch (cir & CIR_SUBTYPEMASK) { |
| case CIR_SUBCOS: |
| ipr = stl_sc26198getreg(portp, IPR); |
| if (ipr & IPR_DCDCHANGE) { |
| set_bit(ASYI_DCDCHANGE, &portp->istate); |
| schedule_work(&portp->tqueue); |
| portp->stats.modem++; |
| } |
| break; |
| case CIR_SUBXONXOFF: |
| xisr = stl_sc26198getreg(portp, XISR); |
| if (xisr & XISR_RXXONGOT) { |
| set_bit(ASYI_TXFLOWED, &portp->istate); |
| portp->stats.txxoff++; |
| } |
| if (xisr & XISR_RXXOFFGOT) { |
| clear_bit(ASYI_TXFLOWED, &portp->istate); |
| portp->stats.txxon++; |
| } |
| break; |
| case CIR_SUBBREAK: |
| stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
| stl_sc26198rxbadchars(portp); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| /* |
| * Loadable module initialization stuff. |
| */ |
| static int __init stallion_module_init(void) |
| { |
| unsigned int i; |
| |
| printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
| |
| spin_lock_init(&stallion_lock); |
| spin_lock_init(&brd_lock); |
| |
| stl_initbrds(); |
| |
| stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
| if (!stl_serial) |
| return -1; |
| |
| /* |
| * Set up a character driver for per board stuff. This is mainly used |
| * to do stats ioctls on the ports. |
| */ |
| if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
| printk("STALLION: failed to register serial board device\n"); |
| |
| stallion_class = class_create(THIS_MODULE, "staliomem"); |
| for (i = 0; i < 4; i++) |
| class_device_create(stallion_class, NULL, |
| MKDEV(STL_SIOMEMMAJOR, i), NULL, |
| "staliomem%d", i); |
| |
| stl_serial->owner = THIS_MODULE; |
| stl_serial->driver_name = stl_drvname; |
| stl_serial->name = "ttyE"; |
| stl_serial->major = STL_SERIALMAJOR; |
| stl_serial->minor_start = 0; |
| stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
| stl_serial->subtype = SERIAL_TYPE_NORMAL; |
| stl_serial->init_termios = stl_deftermios; |
| stl_serial->flags = TTY_DRIVER_REAL_RAW; |
| tty_set_operations(stl_serial, &stl_ops); |
| |
| if (tty_register_driver(stl_serial)) { |
| put_tty_driver(stl_serial); |
| printk("STALLION: failed to register serial driver\n"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit stallion_module_exit(void) |
| { |
| struct stlbrd *brdp; |
| struct stlpanel *panelp; |
| struct stlport *portp; |
| int i, j, k; |
| |
| pr_debug("cleanup_module()\n"); |
| |
| printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
| stl_drvversion); |
| |
| /* |
| * Free up all allocated resources used by the ports. This includes |
| * memory and interrupts. As part of this process we will also do |
| * a hangup on every open port - to try to flush out any processes |
| * hanging onto ports. |
| */ |
| 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); |
| return; |
| } |
| for (i = 0; i < 4; i++) |
| class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
| if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
| printk("STALLION: failed to un-register serial memory device, " |
| "errno=%d\n", -i); |
| class_destroy(stallion_class); |
| |
| for (i = 0; (i < stl_nrbrds); i++) { |
| if ((brdp = stl_brds[i]) == NULL) |
| continue; |
| |
| free_irq(brdp->irq, brdp); |
| |
| for (j = 0; (j < STL_MAXPANELS); j++) { |
| panelp = brdp->panels[j]; |
| if (panelp == NULL) |
| continue; |
| for (k = 0; (k < STL_PORTSPERPANEL); k++) { |
| portp = panelp->ports[k]; |
| if (portp == NULL) |
| continue; |
| if (portp->tty != 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] = NULL; |
| } |
| } |
| |
| module_init(stallion_module_init); |
| module_exit(stallion_module_exit); |
| |
| MODULE_AUTHOR("Greg Ungerer"); |
| MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
| MODULE_LICENSE("GPL"); |