ip2main.c
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上传日期:2013-04-10
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文件大小:114k
- /*
- *
- * (c) 1999 by Computone Corporation
- *
- ********************************************************************************
- *
- * PACKAGE: Linux tty Device Driver for IntelliPort family of multiport
- * serial I/O controllers.
- *
- * DESCRIPTION: Mainline code for the device driver
- *
- *******************************************************************************/
- // ToDo:
- //
- // Fix the immediate DSS_NOW problem.
- // Work over the channel stats return logic in ip2_ipl_ioctl so they
- // make sense for all 256 possible channels and so the user space
- // utilities will compile and work properly.
- //
- // Done:
- //
- // 1.2.14 //|=mhw=|//
- // Added bounds checking to ip2_ipl_ioctl to avoid potential terroristic acts.
- // Changed the definition of ip2trace to be more consistant with kernel style
- // Thanks to Andreas Dilger <adilger@turbolabs.com> for these updates
- //
- // 1.2.13 //|=mhw=|//
- // DEVFS: Renamed ttf/{n} to tts/F{n} and cuf/{n} to cua/F{n} to conform
- // to agreed devfs serial device naming convention.
- //
- // 1.2.12 //|=mhw=|//
- // Cleaned up some remove queue cut and paste errors
- //
- // 1.2.11 //|=mhw=|//
- // Clean up potential NULL pointer dereferences
- // Clean up devfs registration
- // Add kernel command line parsing for io and irq
- // Compile defaults for io and irq are now set in ip2.c not ip2/ip2.h!
- // Reworked poll_only hack for explicit parameter setting
- // You must now EXPLICITLY set poll_only = 1 or set all irqs to 0
- // Merged ip2_loadmain and old_ip2_init
- // Converted all instances of interruptible_sleep_on into queue calls
- // Most of these had no race conditions but better to clean up now
- //
- // 1.2.10 //|=mhw=|//
- // Fixed the bottom half interrupt handler and enabled USE_IQI
- // to split the interrupt handler into a formal top-half / bottom-half
- // Fixed timing window on high speed processors that queued messages to
- // the outbound mail fifo faster than the board could handle.
- //
- // 1.2.9
- // Four box EX was barfing on >128k kmalloc, made structure smaller by
- // reducing output buffer size
- //
- // 1.2.8
- // Device file system support (MHW)
- //
- // 1.2.7
- // Fixed
- // Reload of ip2 without unloading ip2main hangs system on cat of /proc/modules
- //
- // 1.2.6
- //Fixes DCD problems
- // DCD was not reported when CLOCAL was set on call to TIOCMGET
- //
- //Enhancements:
- // TIOCMGET requests and waits for status return
- // No DSS interrupts enabled except for DCD when needed
- //
- // For internal use only
- //
- //#define IP2DEBUG_INIT
- //#define IP2DEBUG_OPEN
- //#define IP2DEBUG_WRITE
- //#define IP2DEBUG_READ
- //#define IP2DEBUG_IOCTL
- //#define IP2DEBUG_IPL
- //#define IP2DEBUG_TRACE
- //#define DEBUG_FIFO
- /************/
- /* Includes */
- /************/
- #include <linux/config.h>
- // Uncomment the following if you want it compiled with modversions
- #include <linux/version.h>
- #include <linux/ctype.h>
- #include <linux/string.h>
- #include <linux/fcntl.h>
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
- #ifdef CONFIG_DEVFS_FS
- #include <linux/devfs_fs_kernel.h>
- #endif
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/major.h>
- #include <linux/wait.h>
- #include <linux/tty.h>
- #include <linux/tty_flip.h>
- #include <linux/termios.h>
- #include <linux/tty_driver.h>
- #include <linux/serial.h>
- #include <linux/ptrace.h>
- #include <linux/ioport.h>
- #include <linux/cdk.h>
- #include <linux/comstats.h>
- #include <linux/delay.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/bitops.h>
- #ifndef KERNEL_VERSION
- #define KERNEL_VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
- #endif
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
- # include <linux/vmalloc.h>
- # include <linux/init.h>
- # include <asm/serial.h>
- #else
- # include <linux/bios32.h>
- #endif
- // These VERSION switches maybe inexact because I simply don't know
- // when the various features appeared in the 2.1.XX kernels.
- // They are good enough for 2.0 vs 2.2 and if you are fooling with
- // the 2.1.XX stuff then it would be trivial for you to fix.
- // Most of these macros were stolen from some other drivers
- // so blame them.
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,4)
- # include <asm/segment.h>
- # define GET_USER(error,value,addr) error = get_user(value,addr)
- # define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
- # define PUT_USER(error,value,addr) error = put_user(value,addr)
- # define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
- # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,5)
- # include <asm/uaccess.h>
- # define pcibios_strerror(status)
- printk( KERN_ERR "IP2: PCI error 0x%x n", status );
- # endif
- #else /* 2.0.x and 2.1.x before 2.1.4 */
- # define proc_register_dynamic(a,b) proc_register(a,b)
- # define GET_USER(error,value,addr)
- do {
- error = verify_area (VERIFY_READ, (void *) addr, sizeof (value));
- if (error == 0)
- value = get_user(addr);
- } while (0)
- # define COPY_FROM_USER(error,dest,src,size)
- do {
- error = verify_area (VERIFY_READ, (void *) src, size);
- if (error == 0)
- memcpy_fromfs (dest, src, size);
- } while (0)
- # define PUT_USER(error,value,addr)
- do {
- error = verify_area (VERIFY_WRITE, (void *) addr, sizeof (value));
- if (error == 0)
- put_user (value, addr);
- } while (0)
- # define COPY_TO_USER(error,dest,src,size)
- do {
- error = verify_area (VERIFY_WRITE, (void *) dest, size);
- if (error == 0)
- memcpy_tofs (dest, src, size);
- } while (0)
- #endif
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
- #define __init
- #define __initfunc(a) a
- #define __initdata
- #define ioremap(a,b) vremap((a),(b))
- #define iounmap(a) vfree((a))
- #define SERIAL_TYPE_NORMAL 1
- #define SERIAL_TYPE_CALLOUT 2
- #define schedule_timeout(a){current->timeout = jiffies + (a); schedule();}
- #define signal_pending(a) ((a)->signal & ~(a)->blocked)
- #define in_interrupt() intr_count
- #endif
- #include "./ip2/ip2types.h"
- #include "./ip2/ip2trace.h"
- #include "./ip2/ip2ioctl.h"
- #include "./ip2/ip2.h"
- #include "./ip2/i2ellis.h"
- #include "./ip2/i2lib.h"
- /*****************
- * /proc/ip2mem *
- *****************/
- #include <linux/proc_fs.h>
- static int ip2_read_procmem(char *, char **, off_t, int);
- int ip2_read_proc(char *, char **, off_t, int, int *, void * );
- /********************/
- /* Type Definitions */
- /********************/
- /*************/
- /* Constants */
- /*************/
- /* String constants to identify ourselves */
- static char *pcName = "Computone IntelliPort Plus multiport driver";
- static char *pcVersion = "1.2.14";
- /* String constants for port names */
- static char *pcDriver_name = "ip2";
- #ifdef CONFIG_DEVFS_FS
- static char *pcTty = "tts/F%d";
- static char *pcCallout = "cua/F%d";
- #else
- static char *pcTty = "ttyF";
- static char *pcCallout = "cuf";
- #endif
- static char *pcIpl = "ip2ipl";
- /* Serial subtype definitions */
- #define SERIAL_TYPE_NORMAL 1
- #define SERIAL_TYPE_CALLOUT 2
- // cheezy kludge or genius - you decide?
- int ip2_loadmain(int *, int *, unsigned char *, int);
- static unsigned char *Fip_firmware;
- static int Fip_firmware_size;
- /***********************/
- /* Function Prototypes */
- /***********************/
- /* Global module entry functions */
- #ifdef MODULE
- int init_module(void);
- void cleanup_module(void);
- #endif
- /* Private (static) functions */
- static int ip2_open(PTTY, struct file *);
- static void ip2_close(PTTY, struct file *);
- static int ip2_write(PTTY, int, const unsigned char *, int);
- static void ip2_putchar(PTTY, unsigned char);
- static void ip2_flush_chars(PTTY);
- static int ip2_write_room(PTTY);
- static int ip2_chars_in_buf(PTTY);
- static void ip2_flush_buffer(PTTY);
- static int ip2_ioctl(PTTY, struct file *, UINT, ULONG);
- static void ip2_set_termios(PTTY, struct termios *);
- static void ip2_set_line_discipline(PTTY);
- static void ip2_throttle(PTTY);
- static void ip2_unthrottle(PTTY);
- static void ip2_stop(PTTY);
- static void ip2_start(PTTY);
- static void ip2_hangup(PTTY);
- static void set_irq(int, int);
- static void ip2_interrupt_bh(i2eBordStrPtr pB);
- static void ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs);
- static void ip2_poll(unsigned long arg);
- static inline void service_all_boards(void);
- static inline void do_input(i2ChanStrPtr pCh);
- static inline void do_status(i2ChanStrPtr pCh);
- static void ip2_wait_until_sent(PTTY,int);
- static void set_params (i2ChanStrPtr, struct termios *);
- static int set_modem_info(i2ChanStrPtr, unsigned int, unsigned int *);
- static int get_serial_info(i2ChanStrPtr, struct serial_struct *);
- static int set_serial_info(i2ChanStrPtr, struct serial_struct *);
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
- static int ip2_ipl_read(struct inode *, char *, size_t , loff_t *);
- #else
- static ssize_t ip2_ipl_read(struct file *, char *, size_t, loff_t *) ;
- #endif
- static ssize_t ip2_ipl_write(struct file *, const char *, size_t, loff_t *);
- static int ip2_ipl_ioctl(struct inode *, struct file *, UINT, ULONG);
- static int ip2_ipl_open(struct inode *, struct file *);
- static int DumpTraceBuffer(char *, int);
- static int DumpFifoBuffer( char *, int);
- static void ip2_init_board(int);
- static unsigned short find_eisa_board(int);
- /***************/
- /* Static Data */
- /***************/
- static struct tty_driver ip2_tty_driver;
- static struct tty_driver ip2_callout_driver;
- static int ref_count;
- /* Here, then is a table of board pointers which the interrupt routine should
- * scan through to determine who it must service.
- */
- static unsigned short i2nBoards; // Number of boards here
- static i2eBordStrPtr i2BoardPtrTable[IP2_MAX_BOARDS];
- static i2ChanStrPtr DevTable[IP2_MAX_PORTS];
- //DevTableMem just used to save addresses for kfree
- static void *DevTableMem[IP2_MAX_BOARDS];
- static struct tty_struct * TtyTable[IP2_MAX_PORTS];
- static struct termios * Termios[IP2_MAX_PORTS];
- static struct termios * TermiosLocked[IP2_MAX_PORTS];
- /* This is the driver descriptor for the ip2ipl device, which is used to
- * download the loadware to the boards.
- */
- static struct file_operations ip2_ipl = {
- owner: THIS_MODULE,
- read: ip2_ipl_read,
- write: ip2_ipl_write,
- ioctl: ip2_ipl_ioctl,
- open: ip2_ipl_open,
- };
- static unsigned long irq_counter = 0;
- static unsigned long bh_counter = 0;
- // Use immediate queue to service interrupts
- #define USE_IQI
- //#define USE_IQ // PCI&2.2 needs work
- /* The timer_list entry for our poll routine. If interrupt operation is not
- * selected, the board is serviced periodically to see if anything needs doing.
- */
- #define POLL_TIMEOUT (jiffies + 1)
- static struct timer_list PollTimer = { function: ip2_poll };
- static char TimerOn;
- #ifdef IP2DEBUG_TRACE
- /* Trace (debug) buffer data */
- #define TRACEMAX 1000
- static unsigned long tracebuf[TRACEMAX];
- static int tracestuff;
- static int tracestrip;
- static int tracewrap;
- #endif
- /**********/
- /* Macros */
- /**********/
- #if defined(MODULE) && defined(IP2DEBUG_OPEN)
- #define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, ttyc=%d, modc=%x -> %sn",
- kdevname(tty->device),(pCh->flags),ref_count,
- tty->count,/*GET_USE_COUNT(module)*/0,s)
- #else
- #define DBG_CNT(s)
- #endif
- #define MIN(a,b) ( ( (a) < (b) ) ? (a) : (b) )
- #define MAX(a,b) ( ( (a) > (b) ) ? (a) : (b) )
- /********/
- /* Code */
- /********/
- #include "./ip2/i2ellis.c" /* Extremely low-level interface services */
- #include "./ip2/i2cmd.c" /* Standard loadware command definitions */
- #include "./ip2/i2lib.c" /* High level interface services */
- /* Configuration area for modprobe */
- #ifdef MODULE
- # if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
- MODULE_AUTHOR("Doug McNash");
- MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
- # endif /* LINUX_VERSION */
- #endif /* MODULE */
- static int poll_only = 0;
- static int Eisa_irq;
- static int Eisa_slot;
- static int iindx;
- static char rirqs[IP2_MAX_BOARDS];
- static int Valid_Irqs[] = { 3, 4, 5, 7, 10, 11, 12, 15, 0};
- // Some functions to keep track of what irq's we have
- static int __init
- is_valid_irq(int irq)
- {
- int *i = Valid_Irqs;
-
- while ((*i != 0) && (*i != irq)) {
- i++;
- }
- return (*i);
- }
- static void __init
- mark_requested_irq( char irq )
- {
- rirqs[iindx++] = irq;
- }
- #ifdef MODULE
- static int __init
- clear_requested_irq( char irq )
- {
- int i;
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if (rirqs[i] == irq) {
- rirqs[i] = 0;
- return 1;
- }
- }
- return 0;
- }
- #endif
- static int __init
- have_requested_irq( char irq )
- {
- // array init to zeros so 0 irq will not be requested as a side effect
- int i;
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if (rirqs[i] == irq)
- return 1;
- }
- return 0;
- }
- /******************************************************************************/
- /* Function: init_module() */
- /* Parameters: None */
- /* Returns: Success (0) */
- /* */
- /* Description: */
- /* This is a required entry point for an installable module. It simply calls */
- /* the driver initialisation function and returns what it returns. */
- /******************************************************************************/
- #ifdef MODULE
- int
- init_module(void)
- {
- #ifdef IP2DEBUG_INIT
- printk (KERN_DEBUG "Loading module ...n" );
- #endif
- return 0;
- }
- #endif /* MODULE */
- /******************************************************************************/
- /* Function: cleanup_module() */
- /* Parameters: None */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This is a required entry point for an installable module. It has to return */
- /* the device and the driver to a passive state. It should not be necessary */
- /* to reset the board fully, especially as the loadware is downloaded */
- /* externally rather than in the driver. We just want to disable the board */
- /* and clear the loadware to a reset state. To allow this there has to be a */
- /* way to detect whether the board has the loadware running at init time to */
- /* handle subsequent installations of the driver. All memory allocated by the */
- /* driver should be returned since it may be unloaded from memory. */
- /******************************************************************************/
- #ifdef MODULE
- void
- cleanup_module(void)
- {
- int err;
- int i;
- #ifdef IP2DEBUG_INIT
- printk (KERN_DEBUG "Unloading %s: version %sn", pcName, pcVersion );
- #endif
- /* Stop poll timer if we had one. */
- if ( TimerOn ) {
- del_timer ( &PollTimer );
- TimerOn = 0;
- }
- /* Reset the boards we have. */
- for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( i2BoardPtrTable[i] ) {
- iiReset( i2BoardPtrTable[i] );
- }
- }
- /* The following is done at most once, if any boards were installed. */
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( i2BoardPtrTable[i] ) {
- iiResetDelay( i2BoardPtrTable[i] );
- /* free io addresses and Tibet */
- release_region( ip2config.addr[i], 8 );
- #ifdef CONFIG_DEVFS_FS
- devfs_unregister (i2BoardPtrTable[i]->devfs_ipl_handle);
- devfs_unregister (i2BoardPtrTable[i]->devfs_stat_handle);
- #endif
- }
- /* Disable and remove interrupt handler. */
- if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {
- free_irq ( ip2config.irq[i], (void *)&pcName);
- clear_requested_irq( ip2config.irq[i]);
- }
- }
- if ( ( err = tty_unregister_driver ( &ip2_tty_driver ) ) ) {
- printk(KERN_ERR "IP2: failed to unregister tty driver (%d)n", err);
- }
- if ( ( err = tty_unregister_driver ( &ip2_callout_driver ) ) ) {
- printk(KERN_ERR "IP2: failed to unregister callout driver (%d)n", err);
- }
- #ifdef CONFIG_DEVFS_FS
- if ( ( err = devfs_unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) )
- #else
- if ( ( err = unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) )
- #endif
- {
- printk(KERN_ERR "IP2: failed to unregister IPL driver (%d)n", err);
- }
- remove_proc_entry("ip2mem", &proc_root);
- // free memory
- for (i = 0; i < IP2_MAX_BOARDS; i++) {
- void *pB;
- if ((pB = i2BoardPtrTable[i]) != 0 ) {
- kfree ( pB );
- i2BoardPtrTable[i] = NULL;
- }
- if ((DevTableMem[i]) != NULL ) {
- kfree ( DevTableMem[i] );
- DevTableMem[i] = NULL;
- }
- }
- /* Cleanup the iiEllis subsystem. */
- iiEllisCleanup();
- #ifdef IP2DEBUG_INIT
- printk (KERN_DEBUG "IP2 Unloadedn" );
- #endif
- }
- #endif /* MODULE */
- /******************************************************************************/
- /* Function: ip2_loadmain() */
- /* Parameters: irq, io from command line of insmod et. al. */
- /* pointer to fip firmware and firmware size for boards */
- /* Returns: Success (0) */
- /* */
- /* Description: */
- /* This was the required entry point for all drivers (now in ip2.c) */
- /* It performs all */
- /* initialisation of the devices and driver structures, and registers itself */
- /* with the relevant kernel modules. */
- /******************************************************************************/
- /* SA_INTERRUPT- if set blocks all interrupts else only this line */
- /* SA_SHIRQ - for shared irq PCI or maybe EISA only */
- /* SA_RANDOM - can be source for cert. random number generators */
- #define IP2_SA_FLAGS 0
- int __init
- ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize)
- {
- #ifdef CONFIG_DEVFS_FS
- static devfs_handle_t devfs_handle;
- int j, box;
- #endif
- int i;
- int err;
- int status = 0;
- static int loaded;
- i2eBordStrPtr pB = NULL;
- int rc = -1;
- ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 );
- /* process command line arguments to modprobe or
- insmod i.e. iop & irqp */
- /* irqp and iop should ALWAYS be specified now... But we check
- them individually just to be sure, anyways... */
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if (iop) {
- ip2config.addr[i] = iop[i];
- if (irqp) {
- if( irqp[i] >= 0 ) {
- ip2config.irq[i] = irqp[i];
- } else {
- ip2config.irq[i] = 0;
- }
- // This is a little bit of a hack. If poll_only=1 on command
- // line back in ip2.c OR all IRQs on all specified boards are
- // explicitly set to 0, then drop to poll only mode and override
- // PCI or EISA interrupts. This superceeds the old hack of
- // triggering if all interrupts were zero (like da default).
- // Still a hack but less prone to random acts of terrorism.
- //
- // What we really should do, now that the IRQ default is set
- // to -1, is to use 0 as a hard coded, do not probe.
- //
- // //|=mhw=|//
- poll_only |= irqp[i];
- }
- }
- }
- poll_only = !poll_only;
- Fip_firmware = firmware;
- Fip_firmware_size = firmsize;
- /* Announce our presence */
- printk( KERN_INFO "%s version %sn", pcName, pcVersion );
- // ip2 can be unloaded and reloaded for no good reason
- // we can't let that happen here or bad things happen
- // second load hoses board but not system - fixme later
- if (loaded) {
- printk( KERN_INFO "Still loadedn" );
- return 0;
- }
- loaded++;
- /* Initialise the iiEllis subsystem. */
- iiEllisInit();
- /* Initialize arrays. */
- memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable );
- memset( DevTable, 0, sizeof DevTable );
- memset( TtyTable, 0, sizeof TtyTable );
- memset( Termios, 0, sizeof Termios );
- memset( TermiosLocked, 0, sizeof TermiosLocked );
- /* Initialise all the boards we can find (up to the maximum). */
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- switch ( ip2config.addr[i] ) {
- case 0: /* skip this slot even if card is present */
- break;
- default: /* ISA */
- /* ISA address must be specified */
- if ( (ip2config.addr[i] < 0x100) || (ip2config.addr[i] > 0x3f8) ) {
- printk ( KERN_ERR "IP2: Bad ISA board %d address %xn",
- i, ip2config.addr[i] );
- ip2config.addr[i] = 0;
- } else {
- ip2config.type[i] = ISA;
- /* Check for valid irq argument, set for polling if invalid */
- if (ip2config.irq[i] && !is_valid_irq(ip2config.irq[i])) {
- printk(KERN_ERR "IP2: Bad IRQ(%d) specifiedn",ip2config.irq[i]);
- ip2config.irq[i] = 0;// 0 is polling and is valid in that sense
- }
- }
- break;
- case PCI:
- #ifdef CONFIG_PCI
- #if (LINUX_VERSION_CODE < 0x020163) /* 2.1.99 */
- if (pcibios_present()) {
- unsigned char pci_bus, pci_devfn;
- int Pci_index = 0;
- status = pcibios_find_device(PCI_VENDOR_ID_COMPUTONE,
- PCI_DEVICE_ID_COMPUTONE_IP2EX, Pci_index,
- &pci_bus, &pci_devfn);
- if (status == 0) {
- unsigned int addr;
- unsigned char pci_irq;
- ip2config.type[i] = PCI;
- /*
- * Update Pci_index, so that the next time we go
- * searching for a PCI board we find a different
- * one.
- */
- ++Pci_index;
- pcibios_read_config_dword(pci_bus, pci_devfn,
- PCI_BASE_ADDRESS_1, &addr);
- if ( addr & 1 ) {
- ip2config.addr[i]=(USHORT)(addr&0xfffe);
- } else {
- printk( KERN_ERR "IP2: PCI I/O address errorn");
- }
- pcibios_read_config_byte(pci_bus, pci_devfn,
- PCI_INTERRUPT_LINE, &pci_irq);
- // If the PCI BIOS assigned it, lets try and use it. If we
- // can't acquire it or it screws up, deal with it then.
- // if (!is_valid_irq(pci_irq)) {
- // printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)n",pci_irq);
- // pci_irq = 0;
- // }
- ip2config.irq[i] = pci_irq;
- } else { // ann error
- ip2config.addr[i] = 0;
- if (status == PCIBIOS_DEVICE_NOT_FOUND) {
- printk( KERN_ERR "IP2: PCI board %d not foundn", i );
- } else {
- pcibios_strerror(status);
- }
- }
- }
- #else /* LINUX_VERSION_CODE > 2.1.99 */
- if (pci_present()) {
- struct pci_dev *pci_dev_i = NULL;
- pci_dev_i = pci_find_device(PCI_VENDOR_ID_COMPUTONE,
- PCI_DEVICE_ID_COMPUTONE_IP2EX, pci_dev_i);
- if (pci_dev_i != NULL) {
- unsigned int addr;
- unsigned char pci_irq;
- ip2config.type[i] = PCI;
- status =
- pci_read_config_dword(pci_dev_i, PCI_BASE_ADDRESS_1, &addr);
- if ( addr & 1 ) {
- ip2config.addr[i]=(USHORT)(addr&0xfffe);
- } else {
- printk( KERN_ERR "IP2: PCI I/O address errorn");
- }
- status =
- pci_read_config_byte(pci_dev_i, PCI_INTERRUPT_LINE, &pci_irq);
- // If the PCI BIOS assigned it, lets try and use it. If we
- // can't acquire it or it screws up, deal with it then.
- // if (!is_valid_irq(pci_irq)) {
- // printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)n",pci_irq);
- // pci_irq = 0;
- // }
- ip2config.irq[i] = pci_irq;
- } else { // ann error
- ip2config.addr[i] = 0;
- if (status == PCIBIOS_DEVICE_NOT_FOUND) {
- printk( KERN_ERR "IP2: PCI board %d not foundn", i );
- } else {
- pcibios_strerror(status);
- }
- }
- }
- #endif /* ! 2_0_X */
- #else
- printk( KERN_ERR "IP2: PCI card specified but PCI support notn");
- printk( KERN_ERR "IP2: configured in this kernel.n");
- printk( KERN_ERR "IP2: Recompile kernel with CONFIG_PCI defined!n");
- #endif /* CONFIG_PCI */
- break;
- case EISA:
- if ( (ip2config.addr[i] = find_eisa_board( Eisa_slot + 1 )) != 0) {
- /* Eisa_irq set as side effect, boo */
- ip2config.type[i] = EISA;
- }
- ip2config.irq[i] = Eisa_irq;
- break;
- } /* switch */
- } /* for */
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( ip2config.addr[i] ) {
- pB = kmalloc( sizeof(i2eBordStr), GFP_KERNEL);
- if ( pB != NULL ) {
- i2BoardPtrTable[i] = pB;
- memset( pB, 0, sizeof(i2eBordStr) );
- iiSetAddress( pB, ip2config.addr[i], ii2DelayTimer );
- iiReset( pB );
- } else {
- printk(KERN_ERR "IP2: board memory allocation errorn");
- }
- }
- }
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( ( pB = i2BoardPtrTable[i] ) != NULL ) {
- iiResetDelay( pB );
- break;
- }
- }
- for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( i2BoardPtrTable[i] != NULL ) {
- ip2_init_board( i );
- }
- }
- ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 );
- /* Zero out the normal tty device structure. */
- memset ( &ip2_tty_driver, 0, sizeof ip2_tty_driver );
- /* Initialise the relevant fields. */
- ip2_tty_driver.magic = TTY_DRIVER_MAGIC;
- ip2_tty_driver.name = pcTty;
- #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
- ip2_tty_driver.driver_name = pcDriver_name;
- ip2_tty_driver.read_proc = ip2_read_proc;
- #endif
- ip2_tty_driver.major = IP2_TTY_MAJOR;
- ip2_tty_driver.minor_start = 0;
- ip2_tty_driver.num = IP2_MAX_PORTS;
- ip2_tty_driver.type = TTY_DRIVER_TYPE_SERIAL;
- ip2_tty_driver.subtype = SERIAL_TYPE_NORMAL;
- ip2_tty_driver.init_termios = tty_std_termios;
- ip2_tty_driver.init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
- #ifdef CONFIG_DEVFS_FS
- ip2_tty_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- #else
- ip2_tty_driver.flags = TTY_DRIVER_REAL_RAW;
- #endif
- ip2_tty_driver.refcount = &ref_count;
- ip2_tty_driver.table = TtyTable;
- ip2_tty_driver.termios = Termios;
- ip2_tty_driver.termios_locked = TermiosLocked;
- /* Setup the pointers to the implemented functions. */
- ip2_tty_driver.open = ip2_open;
- ip2_tty_driver.close = ip2_close;
- ip2_tty_driver.write = ip2_write;
- ip2_tty_driver.put_char = ip2_putchar;
- ip2_tty_driver.flush_chars = ip2_flush_chars;
- ip2_tty_driver.write_room = ip2_write_room;
- ip2_tty_driver.chars_in_buffer = ip2_chars_in_buf;
- ip2_tty_driver.flush_buffer = ip2_flush_buffer;
- ip2_tty_driver.ioctl = ip2_ioctl;
- ip2_tty_driver.throttle = ip2_throttle;
- ip2_tty_driver.unthrottle = ip2_unthrottle;
- ip2_tty_driver.set_termios = ip2_set_termios;
- ip2_tty_driver.set_ldisc = ip2_set_line_discipline;
- ip2_tty_driver.stop = ip2_stop;
- ip2_tty_driver.start = ip2_start;
- ip2_tty_driver.hangup = ip2_hangup;
- /* Initialise the callout driver structure from the tty driver, and
- * make the needed adjustments.
- */
- ip2_callout_driver = ip2_tty_driver;
- ip2_callout_driver.name = pcCallout;
- #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
- ip2_callout_driver.driver_name = pcDriver_name;
- ip2_callout_driver.read_proc = NULL;
- #endif
- ip2_callout_driver.major = IP2_CALLOUT_MAJOR;
- ip2_callout_driver.subtype = SERIAL_TYPE_CALLOUT;
- ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );
- /* Register the tty devices. */
- if ( ( err = tty_register_driver ( &ip2_tty_driver ) ) ) {
- printk(KERN_ERR "IP2: failed to register tty driver (%d)n", err);
- } else
- if ( ( err = tty_register_driver ( &ip2_callout_driver ) ) ) {
- printk(KERN_ERR "IP2: failed to register callout driver (%d)n", err);
- } else
- /* Register the IPL driver. */
- #ifdef CONFIG_DEVFS_FS
- if (( err = devfs_register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl )))
- #else
- if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) )
- #endif
- {
- printk(KERN_ERR "IP2: failed to register IPL device (%d)n", err );
- } else
- /* Register the read_procmem thing */
- if (!create_proc_info_entry("ip2mem",0,&proc_root,ip2_read_procmem)) {
- printk(KERN_ERR "IP2: failed to register read_procmemn");
- } else {
- ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 );
- /* Register the interrupt handler or poll handler, depending upon the
- * specified interrupt.
- */
- #ifdef CONFIG_DEVFS_FS
- if (!devfs_handle)
- devfs_handle = devfs_mk_dir (NULL, "ip2", NULL);
- #endif
- for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- #ifdef CONFIG_DEVFS_FS
- char name[16];
- #endif
- if ( 0 == ip2config.addr[i] ) {
- continue;
- }
- #ifdef CONFIG_DEVFS_FS
- if ( NULL != ( pB = i2BoardPtrTable[i] ) ) {
- sprintf( name, "ipl%d", i );
- pB->devfs_ipl_handle =
- devfs_register (devfs_handle, name,
- DEVFS_FL_DEFAULT,
- IP2_IPL_MAJOR, 4 * i,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
- &ip2_ipl, NULL);
- sprintf( name, "stat%d", i );
- pB->devfs_stat_handle =
- devfs_register (devfs_handle, name,
- DEVFS_FL_DEFAULT,
- IP2_IPL_MAJOR, 4 * i + 1,
- S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
- &ip2_ipl, NULL);
- for ( box = 0; box < ABS_MAX_BOXES; ++box )
- {
- for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
- {
- if ( pB->i2eChannelMap[box] & (1 << j) )
- {
- tty_register_devfs(&ip2_tty_driver,
- 0, j + ABS_BIGGEST_BOX *
- (box+i*ABS_MAX_BOXES));
- tty_register_devfs(&ip2_callout_driver,
- 0, j + ABS_BIGGEST_BOX *
- (box+i*ABS_MAX_BOXES));
- }
- }
- }
- }
- #endif
- if (poll_only) {
- // Poll only forces driver to only use polling and
- // to ignore the probed PCI or EISA interrupts.
- ip2config.irq[i] = CIR_POLL;
- }
- if ( ip2config.irq[i] == CIR_POLL ) {
- retry:
- if (!TimerOn) {
- PollTimer.expires = POLL_TIMEOUT;
- add_timer ( &PollTimer );
- TimerOn = 1;
- printk( KERN_INFO "IP2: pollingn");
- }
- } else {
- if (have_requested_irq(ip2config.irq[i]))
- continue;
- rc = request_irq( ip2config.irq[i], ip2_interrupt,
- IP2_SA_FLAGS | (ip2config.type[i] == PCI ? SA_SHIRQ : 0),
- pcName, (void *)&pcName);
- if (rc) {
- printk(KERN_ERR "IP2: an request_irq failed: error %dn",rc);
- ip2config.irq[i] = CIR_POLL;
- printk( KERN_INFO "IP2: Polling %ld/sec.n",
- (POLL_TIMEOUT - jiffies));
- goto retry;
- }
- mark_requested_irq(ip2config.irq[i]);
- /* Initialise the interrupt handler bottom half (aka slih). */
- }
- }
- for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- if ( i2BoardPtrTable[i] ) {
- set_irq( i, ip2config.irq[i] ); /* set and enable board interrupt */
- }
- }
- }
- ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 );
- return 0;
- }
- /******************************************************************************/
- /* Function: ip2_init_board() */
- /* Parameters: Index of board in configuration structure */
- /* Returns: Success (0) */
- /* */
- /* Description: */
- /* This function initializes the specified board. The loadware is copied to */
- /* the board, the channel structures are initialized, and the board details */
- /* are reported on the console. */
- /******************************************************************************/
- static void __init
- ip2_init_board( int boardnum )
- {
- int i,rc;
- int nports = 0, nboxes = 0;
- i2ChanStrPtr pCh;
- i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
- if ( !iiInitialize ( pB ) ) {
- printk ( KERN_ERR "IP2: Failed to initialize board at 0x%x, error %dn",
- pB->i2eBase, pB->i2eError );
- goto err_initialize;
- }
- printk(KERN_INFO "IP2: Board %d: addr=0x%x irq=%dn", boardnum + 1,
- ip2config.addr[boardnum], ip2config.irq[boardnum] );
- if (!request_region( ip2config.addr[boardnum], 8, pcName )) {
- printk(KERN_ERR "IP2: bad addr=0x%xn", ip2config.addr[boardnum]);
- goto err_initialize;
- }
- if ( iiDownloadAll ( pB, (loadHdrStrPtr)Fip_firmware, 1, Fip_firmware_size )
- != II_DOWN_GOOD ) {
- printk ( KERN_ERR "IP2: failed to download loadwaren" );
- goto err_release_region;
- } else {
- printk ( KERN_INFO "IP2: fv=%d.%d.%d lv=%d.%d.%dn",
- pB->i2ePom.e.porVersion,
- pB->i2ePom.e.porRevision,
- pB->i2ePom.e.porSubRev, pB->i2eLVersion,
- pB->i2eLRevision, pB->i2eLSub );
- }
- switch ( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) {
- default:
- printk( KERN_ERR "IP2: Unknown board type, ID = %xn",
- pB->i2ePom.e.porID );
- nports = 0;
- goto err_release_region;
- break;
- case POR_ID_II_4: /* IntelliPort-II, ISA-4 (4xRJ45) */
- printk ( KERN_INFO "IP2: ISA-4n" );
- nports = 4;
- break;
- case POR_ID_II_8: /* IntelliPort-II, 8-port using standard brick. */
- printk ( KERN_INFO "IP2: ISA-8 stdn" );
- nports = 8;
- break;
- case POR_ID_II_8R: /* IntelliPort-II, 8-port using RJ11's (no CTS) */
- printk ( KERN_INFO "IP2: ISA-8 RJ11n" );
- nports = 8;
- break;
- case POR_ID_FIIEX: /* IntelliPort IIEX */
- {
- int portnum = IP2_PORTS_PER_BOARD * boardnum;
- int box;
- for( box = 0; box < ABS_MAX_BOXES; ++box ) {
- if ( pB->i2eChannelMap[box] != 0 ) {
- ++nboxes;
- }
- for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
- if ( pB->i2eChannelMap[box] & 1<< i ) {
- ++nports;
- }
- }
- }
- DevTableMem[boardnum] = pCh =
- kmalloc( sizeof(i2ChanStr) * nports, GFP_KERNEL );
- if ( !pCh ) {
- printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.n");
- goto err_release_region;
- }
- if ( !i2InitChannels( pB, nports, pCh ) ) {
- printk(KERN_ERR "IP2: i2InitChannels failed: %dn",pB->i2eError);
- kfree ( pCh );
- goto err_release_region;
- }
- pB->i2eChannelPtr = &DevTable[portnum];
- pB->i2eChannelCnt = ABS_MOST_PORTS;
- for( box = 0; box < ABS_MAX_BOXES; ++box, portnum += ABS_BIGGEST_BOX ) {
- for( i = 0; i < ABS_BIGGEST_BOX; ++i ) {
- if ( pB->i2eChannelMap[box] & (1 << i) ) {
- DevTable[portnum + i] = pCh;
- pCh->port_index = portnum + i;
- pCh++;
- }
- }
- }
- printk(KERN_INFO "IP2: EX box=%d ports=%d %d bitn",
- nboxes, nports, pB->i2eDataWidth16 ? 16 : 8 );
- }
- goto ex_exit;
- }
- DevTableMem[boardnum] = pCh =
- kmalloc ( sizeof (i2ChanStr) * nports, GFP_KERNEL );
- if ( !pCh ) {
- printk ( KERN_ERR "IP2: (i2_init_channel:) Out of memory.n");
- goto err_release_region;
- }
- pB->i2eChannelPtr = pCh;
- pB->i2eChannelCnt = nports;
- if ( !i2InitChannels( pB, nports, pCh ) ) {
- printk(KERN_ERR "IP2: i2InitChannels failed: %dn",pB->i2eError);
- kfree ( pCh );
- goto err_release_region;
- }
- pB->i2eChannelPtr = &DevTable[IP2_PORTS_PER_BOARD * boardnum];
- for( i = 0; i < pB->i2eChannelCnt; ++i ) {
- DevTable[IP2_PORTS_PER_BOARD * boardnum + i] = pCh;
- pCh->port_index = (IP2_PORTS_PER_BOARD * boardnum) + i;
- pCh++;
- }
- ex_exit:
- pB->tqueue_interrupt.routine = (void(*)(void*)) ip2_interrupt_bh;
- pB->tqueue_interrupt.data = pB;
- return;
- err_release_region:
- release_region(ip2config.addr[boardnum], 8);
- err_initialize:
- kfree ( pB );
- i2BoardPtrTable[boardnum] = NULL;
- return;
- }
- /******************************************************************************/
- /* Function: find_eisa_board ( int start_slot ) */
- /* Parameters: First slot to check */
- /* Returns: Address of EISA IntelliPort II controller */
- /* */
- /* Description: */
- /* This function searches for an EISA IntelliPort controller, starting */
- /* from the specified slot number. If the motherboard is not identified as an */
- /* EISA motherboard, or no valid board ID is selected it returns 0. Otherwise */
- /* it returns the base address of the controller. */
- /******************************************************************************/
- static unsigned short __init
- find_eisa_board( int start_slot )
- {
- int i, j;
- unsigned int idm = 0;
- unsigned int idp = 0;
- unsigned int base = 0;
- unsigned int value;
- int setup_address;
- int setup_irq;
- int ismine = 0;
- /*
- * First a check for an EISA motherboard, which we do by comparing the
- * EISA ID registers for the system board and the first couple of slots.
- * No slot ID should match the system board ID, but on an ISA or PCI
- * machine the odds are that an empty bus will return similar values for
- * each slot.
- */
- i = 0x0c80;
- value = (inb(i) << 24) + (inb(i+1) << 16) + (inb(i+2) << 8) + inb(i+3);
- for( i = 0x1c80; i <= 0x4c80; i += 0x1000 ) {
- j = (inb(i)<<24)+(inb(i+1)<<16)+(inb(i+2)<<8)+inb(i+3);
- if ( value == j )
- return 0;
- }
- /*
- * OK, so we are inclined to believe that this is an EISA machine. Find
- * an IntelliPort controller.
- */
- for( i = start_slot; i < 16; i++ ) {
- base = i << 12;
- idm = (inb(base + 0xc80) << 8) | (inb(base + 0xc81) & 0xff);
- idp = (inb(base + 0xc82) << 8) | (inb(base + 0xc83) & 0xff);
- ismine = 0;
- if ( idm == 0x0e8e ) {
- if ( idp == 0x0281 || idp == 0x0218 ) {
- ismine = 1;
- } else if ( idp == 0x0282 || idp == 0x0283 ) {
- ismine = 3; /* Can do edge-trigger */
- }
- if ( ismine ) {
- Eisa_slot = i;
- break;
- }
- }
- }
- if ( !ismine )
- return 0;
- /* It's some sort of EISA card, but at what address is it configured? */
- setup_address = base + 0xc88;
- value = inb(base + 0xc86);
- setup_irq = (value & 8) ? Valid_Irqs[value & 7] : 0;
- if ( (ismine & 2) && !(value & 0x10) ) {
- ismine = 1; /* Could be edging, but not */
- }
- if ( Eisa_irq == 0 ) {
- Eisa_irq = setup_irq;
- } else if ( Eisa_irq != setup_irq ) {
- printk ( KERN_ERR "IP2: EISA irq mismatch between EISA controllersn" );
- }
- #ifdef IP2DEBUG_INIT
- printk(KERN_DEBUG "Computone EISA board in slot %d, I.D. 0x%x%x, Address 0x%x",
- base >> 12, idm, idp, setup_address);
- if ( Eisa_irq ) {
- printk(KERN_DEBUG ", Interrupt %d %sn",
- setup_irq, (ismine & 2) ? "(edge)" : "(level)");
- } else {
- printk(KERN_DEBUG ", (polled)n");
- }
- #endif
- return setup_address;
- }
- /******************************************************************************/
- /* Function: set_irq() */
- /* Parameters: index to board in board table */
- /* IRQ to use */
- /* Returns: Success (0) */
- /* */
- /* Description: */
- /******************************************************************************/
- static void
- set_irq( int boardnum, int boardIrq )
- {
- unsigned char tempCommand[16];
- i2eBordStrPtr pB = i2BoardPtrTable[boardnum];
- unsigned long flags;
- /*
- * Notify the boards they may generate interrupts. This is done by
- * sending an in-line command to channel 0 on each board. This is why
- * the channels have to be defined already. For each board, if the
- * interrupt has never been defined, we must do so NOW, directly, since
- * board will not send flow control or even give an interrupt until this
- * is done. If polling we must send 0 as the interrupt parameter.
- */
- // We will get an interrupt here at the end of this function
- iiDisableMailIrq(pB);
- /* We build up the entire packet header. */
- CHANNEL_OF(tempCommand) = 0;
- PTYPE_OF(tempCommand) = PTYPE_INLINE;
- CMD_COUNT_OF(tempCommand) = 2;
- (CMD_OF(tempCommand))[0] = CMDVALUE_IRQ;
- (CMD_OF(tempCommand))[1] = boardIrq;
- /*
- * Write to FIFO; don't bother to adjust fifo capacity for this, since
- * board will respond almost immediately after SendMail hit.
- */
- WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
- iiWriteBuf(pB, tempCommand, 4);
- WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
- pB->i2eUsingIrq = boardIrq;
- pB->i2eOutMailWaiting |= MB_OUT_STUFFED;
- /* Need to update number of boards before you enable mailbox int */
- ++i2nBoards;
- CHANNEL_OF(tempCommand) = 0;
- PTYPE_OF(tempCommand) = PTYPE_BYPASS;
- CMD_COUNT_OF(tempCommand) = 6;
- (CMD_OF(tempCommand))[0] = 88; // SILO
- (CMD_OF(tempCommand))[1] = 64; // chars
- (CMD_OF(tempCommand))[2] = 32; // ms
- (CMD_OF(tempCommand))[3] = 28; // MAX_BLOCK
- (CMD_OF(tempCommand))[4] = 64; // chars
- (CMD_OF(tempCommand))[5] = 87; // HW_TEST
- WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
- iiWriteBuf(pB, tempCommand, 8);
- WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
- CHANNEL_OF(tempCommand) = 0;
- PTYPE_OF(tempCommand) = PTYPE_BYPASS;
- CMD_COUNT_OF(tempCommand) = 1;
- (CMD_OF(tempCommand))[0] = 84; /* get BOX_IDS */
- iiWriteBuf(pB, tempCommand, 3);
- #ifdef XXX
- // enable heartbeat for test porpoises
- CHANNEL_OF(tempCommand) = 0;
- PTYPE_OF(tempCommand) = PTYPE_BYPASS;
- CMD_COUNT_OF(tempCommand) = 2;
- (CMD_OF(tempCommand))[0] = 44; /* get ping */
- (CMD_OF(tempCommand))[1] = 200; /* 200 ms */
- WRITE_LOCK_IRQSAVE(&pB->write_fifo_spinlock,flags);
- iiWriteBuf(pB, tempCommand, 4);
- WRITE_UNLOCK_IRQRESTORE(&pB->write_fifo_spinlock,flags);
- #endif
- iiEnableMailIrq(pB);
- iiSendPendingMail(pB);
- }
- /******************************************************************************/
- /* Interrupt Handler Section */
- /******************************************************************************/
- static inline void
- service_all_boards()
- {
- int i;
- i2eBordStrPtr pB;
- /* Service every board on the list */
- for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
- pB = i2BoardPtrTable[i];
- if ( pB ) {
- i2ServiceBoard( pB );
- }
- }
- }
- /******************************************************************************/
- /* Function: ip2_interrupt_bh(pB) */
- /* Parameters: pB - pointer to the board structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* Service the board in a bottom half interrupt handler and then */
- /* reenable the board's interrupts if it has an IRQ number */
- /* */
- /******************************************************************************/
- static void
- ip2_interrupt_bh(i2eBordStrPtr pB)
- {
- // pB better well be set or we have a problem! We can only get
- // here from the IMMEDIATE queue. Here, we process the boards.
- // Checking pB doesn't cost much and it saves us from the sanity checkers.
- bh_counter++;
- if ( pB ) {
- i2ServiceBoard( pB );
- if( pB->i2eUsingIrq ) {
- // Re-enable his interrupts
- iiEnableMailIrq(pB);
- }
- }
- }
- /******************************************************************************/
- /* Function: ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs) */
- /* Parameters: irq - interrupt number */
- /* pointer to optional device ID structure */
- /* pointer to register structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* Our task here is simply to identify each board which needs servicing. */
- /* If we are queuing then, queue it to be serviced, and disable its irq */
- /* mask otherwise process the board directly. */
- /* */
- /* We could queue by IRQ but that just complicates things on both ends */
- /* with very little gain in performance (how many instructions does */
- /* it take to iterate on the immediate queue). */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs)
- {
- int i;
- i2eBordStrPtr pB;
- ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq );
- /* Service just the boards on the list using this irq */
- for( i = 0; i < i2nBoards; ++i ) {
- pB = i2BoardPtrTable[i];
- // Only process those boards which match our IRQ.
- // IRQ = 0 for polled boards, we won't poll "IRQ" boards
- if ( pB && (pB->i2eUsingIrq == irq) ) {
- #ifdef USE_IQI
- if (NO_MAIL_HERE != ( pB->i2eStartMail = iiGetMail(pB))) {
- // Disable his interrupt (will be enabled when serviced)
- // This is mostly to protect from reentrancy.
- iiDisableMailIrq(pB);
- // Park the board on the immediate queue for processing.
- queue_task(&pB->tqueue_interrupt, &tq_immediate);
- // Make sure the immediate queue is flagged to fire.
- mark_bh(IMMEDIATE_BH);
- }
- #else
- // We are using immediate servicing here. This sucks and can
- // cause all sorts of havoc with ppp and others. The failsafe
- // check on iiSendPendingMail could also throw a hairball.
- i2ServiceBoard( pB );
- #endif /* USE_IQI */
- }
- }
- ++irq_counter;
- ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
- }
- /******************************************************************************/
- /* Function: ip2_poll(unsigned long arg) */
- /* Parameters: ? */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This function calls the library routine i2ServiceBoard for each board in */
- /* the board table. This is used instead of the interrupt routine when polled */
- /* mode is specified. */
- /******************************************************************************/
- static void
- ip2_poll(unsigned long arg)
- {
- ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 );
- TimerOn = 0; // it's the truth but not checked in service
- // Just polled boards, IRQ = 0 will hit all non-interrupt boards.
- // It will NOT poll boards handled by hard interrupts.
- // The issue of queued BH interrups is handled in ip2_interrupt().
- ip2_interrupt(0, NULL, NULL);
- PollTimer.expires = POLL_TIMEOUT;
- add_timer( &PollTimer );
- TimerOn = 1;
- ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
- }
- static inline void
- do_input( i2ChanStrPtr pCh )
- {
- unsigned long flags;
- ip2trace(CHANN, ITRC_INPUT, 21, 0 );
- // Data input
- if ( pCh->pTTY != NULL ) {
- READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
- if (!pCh->throttled && (pCh->Ibuf_stuff != pCh->Ibuf_strip)) {
- READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
- i2Input( pCh );
- } else
- READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
- } else {
- ip2trace(CHANN, ITRC_INPUT, 22, 0 );
- i2InputFlush( pCh );
- }
- }
- // code duplicated from n_tty (ldisc)
- static inline void
- isig(int sig, struct tty_struct *tty, int flush)
- {
- if (tty->pgrp > 0)
- kill_pg(tty->pgrp, sig, 1);
- if (flush || !L_NOFLSH(tty)) {
- if ( tty->ldisc.flush_buffer )
- tty->ldisc.flush_buffer(tty);
- i2InputFlush( tty->driver_data );
- }
- }
- static inline void
- do_status( i2ChanStrPtr pCh )
- {
- int status;
- status = i2GetStatus( pCh, (I2_BRK|I2_PAR|I2_FRA|I2_OVR) );
- ip2trace (CHANN, ITRC_STATUS, 21, 1, status );
- if (pCh->pTTY && (status & (I2_BRK|I2_PAR|I2_FRA|I2_OVR)) ) {
- if ( (status & I2_BRK) ) {
- // code duplicated from n_tty (ldisc)
- if (I_IGNBRK(pCh->pTTY))
- goto skip_this;
- if (I_BRKINT(pCh->pTTY)) {
- isig(SIGINT, pCh->pTTY, 1);
- goto skip_this;
- }
- wake_up_interruptible(&pCh->pTTY->read_wait);
- }
- #ifdef NEVER_HAPPENS_AS_SETUP_XXX
- // and can't work because we don't know the_char
- // as the_char is reported on a seperate path
- // The intelligent board does this stuff as setup
- {
- char brkf = TTY_NORMAL;
- unsigned char brkc = ' ';
- unsigned char tmp;
- if ( (status & I2_BRK) ) {
- brkf = TTY_BREAK;
- brkc = ' ';
- }
- else if (status & I2_PAR) {
- brkf = TTY_PARITY;
- brkc = the_char;
- } else if (status & I2_FRA) {
- brkf = TTY_FRAME;
- brkc = the_char;
- } else if (status & I2_OVR) {
- brkf = TTY_OVERRUN;
- brkc = the_char;
- }
- tmp = pCh->pTTY->real_raw;
- pCh->pTTY->real_raw = 0;
- pCh->pTTY->ldisc.receive_buf( pCh->pTTY, &brkc, &brkf, 1 );
- pCh->pTTY->real_raw = tmp;
- }
- #endif /* NEVER_HAPPENS_AS_SETUP_XXX */
- }
- skip_this:
- if ( status & (I2_DDCD | I2_DDSR | I2_DCTS | I2_DRI) ) {
- wake_up_interruptible(&pCh->delta_msr_wait);
- if ( (pCh->flags & ASYNC_CHECK_CD) && (status & I2_DDCD) ) {
- if ( status & I2_DCD ) {
- if ( pCh->wopen ) {
- wake_up_interruptible ( &pCh->open_wait );
- }
- } else if ( !(pCh->flags & ASYNC_CALLOUT_ACTIVE) ) {
- if (pCh->pTTY && (!(pCh->pTTY->termios->c_cflag & CLOCAL)) ) {
- tty_hangup( pCh->pTTY );
- }
- }
- }
- }
- ip2trace (CHANN, ITRC_STATUS, 26, 0 );
- }
- /******************************************************************************/
- /* Device Open/Close/Ioctl Entry Point Section */
- /******************************************************************************/
- /******************************************************************************/
- /* Function: open_sanity_check() */
- /* Parameters: Pointer to tty structure */
- /* Pointer to file structure */
- /* Returns: Success or failure */
- /* */
- /* Description: */
- /* Verifies the structure magic numbers and cross links. */
- /******************************************************************************/
- #ifdef IP2DEBUG_OPEN
- static void
- open_sanity_check( i2ChanStrPtr pCh, i2eBordStrPtr pBrd )
- {
- if ( pBrd->i2eValid != I2E_MAGIC ) {
- printk(KERN_ERR "IP2: invalid board structuren" );
- } else if ( pBrd != pCh->pMyBord ) {
- printk(KERN_ERR "IP2: board structure pointer mismatch (%p)n",
- pCh->pMyBord );
- } else if ( pBrd->i2eChannelCnt < pCh->port_index ) {
- printk(KERN_ERR "IP2: bad device index (%d)n", pCh->port_index );
- } else if (&((i2ChanStrPtr)pBrd->i2eChannelPtr)[pCh->port_index] != pCh) {
- } else {
- printk(KERN_INFO "IP2: all pointers check out!n" );
- }
- }
- #endif
- /******************************************************************************/
- /* Function: ip2_open() */
- /* Parameters: Pointer to tty structure */
- /* Pointer to file structure */
- /* Returns: Success or failure */
- /* */
- /* Description: (MANDATORY) */
- /* A successful device open has to run a gauntlet of checks before it */
- /* completes. After some sanity checking and pointer setup, the function */
- /* blocks until all conditions are satisfied. It then initialises the port to */
- /* the default characteristics and returns. */
- /******************************************************************************/
- static int
- ip2_open( PTTY tty, struct file *pFile )
- {
- wait_queue_t wait;
- int rc = 0;
- int do_clocal = 0;
- i2ChanStrPtr pCh = DevTable[MINOR(tty->device)];
- ip2trace (MINOR(tty->device), ITRC_OPEN, ITRC_ENTER, 0 );
- if ( pCh == NULL ) {
- return -ENODEV;
- }
- /* Setup pointer links in device and tty structures */
- pCh->pTTY = tty;
- tty->driver_data = pCh;
- MOD_INC_USE_COUNT;
- #ifdef IP2DEBUG_OPEN
- printk(KERN_DEBUG
- "IP2:open(tty=%p,pFile=%p):dev=%x,maj=%d,min=%d,ch=%d,idx=%dn",
- tty, pFile, tty->device, MAJOR(tty->device), MINOR(tty->device),
- pCh->infl.hd.i2sChannel, pCh->port_index);
- open_sanity_check ( pCh, pCh->pMyBord );
- #endif
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 3, CMD_DTRUP,CMD_RTSUP,CMD_DCD_REP);
- pCh->dataSetOut |= (I2_DTR | I2_RTS);
- serviceOutgoingFifo( pCh->pMyBord );
- /* Block here until the port is ready (per serial and istallion) */
- /*
- * 1. If the port is in the middle of closing wait for the completion
- * and then return the appropriate error.
- */
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&pCh->close_wait, &wait);
- set_current_state( TASK_INTERRUPTIBLE );
- if ( tty_hung_up_p(pFile) || ( pCh->flags & ASYNC_CLOSING )) {
- if ( pCh->flags & ASYNC_CLOSING ) {
- schedule();
- }
- if ( tty_hung_up_p(pFile) ) {
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->close_wait, &wait);
- return( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS;
- }
- }
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->close_wait, &wait);
- /*
- * 2. If this is a callout device, make sure the normal port is not in
- * use, and that someone else doesn't have the callout device locked.
- * (These are the only tests the standard serial driver makes for
- * callout devices.)
- */
- if ( tty->driver.subtype == SERIAL_TYPE_CALLOUT ) {
- if ( pCh->flags & ASYNC_NORMAL_ACTIVE ) {
- return -EBUSY;
- }
- if ( ( pCh->flags & ASYNC_CALLOUT_ACTIVE ) &&
- ( pCh->flags & ASYNC_SESSION_LOCKOUT ) &&
- ( pCh->session != current->session ) ) {
- return -EBUSY;
- }
- if ( ( pCh->flags & ASYNC_CALLOUT_ACTIVE ) &&
- ( pCh->flags & ASYNC_PGRP_LOCKOUT ) &&
- ( pCh->pgrp != current->pgrp ) ) {
- return -EBUSY;
- }
- pCh->flags |= ASYNC_CALLOUT_ACTIVE;
- goto noblock;
- }
- /*
- * 3. Handle a non-blocking open of a normal port.
- */
- if ( (pFile->f_flags & O_NONBLOCK) || (tty->flags & (1<<TTY_IO_ERROR) )) {
- if ( pCh->flags & ASYNC_CALLOUT_ACTIVE ) {
- return -EBUSY;
- }
- pCh->flags |= ASYNC_NORMAL_ACTIVE;
- goto noblock;
- }
- /*
- * 4. Now loop waiting for the port to be free and carrier present
- * (if required).
- */
- if ( pCh->flags & ASYNC_CALLOUT_ACTIVE ) {
- if ( pCh->NormalTermios.c_cflag & CLOCAL ) {
- do_clocal = 1;
- }
- } else {
- if ( tty->termios->c_cflag & CLOCAL ) {
- do_clocal = 1;
- }
- }
- #ifdef IP2DEBUG_OPEN
- printk(KERN_DEBUG "OpenBlock: do_clocal = %dn", do_clocal);
- #endif
- ++pCh->wopen;
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&pCh->open_wait, &wait);
- for(;;) {
- if ( !(pCh->flags & ASYNC_CALLOUT_ACTIVE)) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
- pCh->dataSetOut |= (I2_DTR | I2_RTS);
- set_current_state( TASK_INTERRUPTIBLE );
- serviceOutgoingFifo( pCh->pMyBord );
- }
- if ( tty_hung_up_p(pFile) ) {
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->open_wait, &wait);
- return ( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EBUSY : -ERESTARTSYS;
- }
- if ( !(pCh->flags & ASYNC_CALLOUT_ACTIVE) &&
- !(pCh->flags & ASYNC_CLOSING) &&
- (do_clocal || (pCh->dataSetIn & I2_DCD) )) {
- rc = 0;
- break;
- }
- #ifdef IP2DEBUG_OPEN
- printk(KERN_DEBUG "ASYNC_CALLOUT_ACTIVE = %sn",
- (pCh->flags & ASYNC_CALLOUT_ACTIVE)?"True":"False");
- printk(KERN_DEBUG "ASYNC_CLOSING = %sn",
- (pCh->flags & ASYNC_CLOSING)?"True":"False");
- printk(KERN_DEBUG "OpenBlock: waiting for CD or signaln");
- #endif
- ip2trace (CHANN, ITRC_OPEN, 3, 2, (pCh->flags & ASYNC_CALLOUT_ACTIVE),
- (pCh->flags & ASYNC_CLOSING) );
- /* check for signal */
- if (signal_pending(current)) {
- rc = (( pCh->flags & ASYNC_HUP_NOTIFY ) ? -EAGAIN : -ERESTARTSYS);
- break;
- }
- schedule();
- }
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->open_wait, &wait);
- --pCh->wopen; //why count?
- ip2trace (CHANN, ITRC_OPEN, 4, 0 );
- if (rc != 0 ) {
- return rc;
- }
- pCh->flags |= ASYNC_NORMAL_ACTIVE;
- noblock:
- /* first open - Assign termios structure to port */
- if ( tty->count == 1 ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
- if ( pCh->flags & ASYNC_SPLIT_TERMIOS ) {
- if ( tty->driver.subtype == SERIAL_TYPE_NORMAL ) {
- *tty->termios = pCh->NormalTermios;
- } else {
- *tty->termios = pCh->CalloutTermios;
- }
- }
- /* Now we must send the termios settings to the loadware */
- set_params( pCh, NULL );
- }
- /* override previous and never reset ??? */
- pCh->session = current->session;
- pCh->pgrp = current->pgrp;
- /*
- * Now set any i2lib options. These may go away if the i2lib code ends
- * up rolled into the mainline.
- */
- pCh->channelOptions |= CO_NBLOCK_WRITE;
- #ifdef IP2DEBUG_OPEN
- printk (KERN_DEBUG "IP2: open completedn" );
- #endif
- serviceOutgoingFifo( pCh->pMyBord );
- ip2trace (CHANN, ITRC_OPEN, ITRC_RETURN, 0 );
- return 0;
- }
- /******************************************************************************/
- /* Function: ip2_close() */
- /* Parameters: Pointer to tty structure */
- /* Pointer to file structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_close( PTTY tty, struct file *pFile )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- if ( !pCh ) {
- return;
- }
- ip2trace (CHANN, ITRC_CLOSE, ITRC_ENTER, 0 );
- #ifdef IP2DEBUG_OPEN
- printk(KERN_DEBUG "IP2:close ttyF%02X:n",MINOR(tty->device));
- #endif
- if ( tty_hung_up_p ( pFile ) ) {
- MOD_DEC_USE_COUNT;
- ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 );
- return;
- }
- if ( tty->count > 1 ) { /* not the last close */
- MOD_DEC_USE_COUNT;
- ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 );
- return;
- }
- pCh->flags |= ASYNC_CLOSING; // last close actually
- /*
- * Save the termios structure, since this port may have separate termios
- * for callout and dialin.
- */
- if (pCh->flags & ASYNC_NORMAL_ACTIVE)
- pCh->NormalTermios = *tty->termios;
- if (pCh->flags & ASYNC_CALLOUT_ACTIVE)
- pCh->CalloutTermios = *tty->termios;
- tty->closing = 1;
- if (pCh->ClosingWaitTime != ASYNC_CLOSING_WAIT_NONE) {
- /*
- * Before we drop DTR, make sure the transmitter has completely drained.
- * This uses an timeout, after which the close
- * completes.
- */
- ip2_wait_until_sent(tty, pCh->ClosingWaitTime );
- }
- /*
- * At this point we stop accepting input. Here we flush the channel
- * input buffer which will allow the board to send up more data. Any
- * additional input is tossed at interrupt/poll time.
- */
- i2InputFlush( pCh );
- /* disable DSS reporting */
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 4,
- CMD_DCD_NREP, CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
- if ( !tty || (tty->termios->c_cflag & HUPCL) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
- pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
- i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
- }
- serviceOutgoingFifo ( pCh->pMyBord );
- if ( tty->driver.flush_buffer )
- tty->driver.flush_buffer(tty);
- if ( tty->ldisc.flush_buffer )
- tty->ldisc.flush_buffer(tty);
- tty->closing = 0;
-
- pCh->pTTY = NULL;
- if (pCh->wopen) {
- if (pCh->ClosingDelay) {
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(pCh->ClosingDelay);
- }
- wake_up_interruptible(&pCh->open_wait);
- }
- pCh->flags &=~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&pCh->close_wait);
- #ifdef IP2DEBUG_OPEN
- DBG_CNT("ip2_close: after wakeups--");
- #endif
- MOD_DEC_USE_COUNT;
- ip2trace (CHANN, ITRC_CLOSE, ITRC_RETURN, 1, 1 );
- return;
- }
- /******************************************************************************/
- /* Function: ip2_hangup() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_hangup ( PTTY tty )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- if( !pCh ) {
- return;
- }
- ip2trace (CHANN, ITRC_HANGUP, ITRC_ENTER, 0 );
- ip2_flush_buffer(tty);
- /* disable DSS reporting */
- i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_DCD_NREP);
- i2QueueCommands(PTYPE_INLINE, pCh, 0, 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
- if ( (tty->termios->c_cflag & HUPCL) ) {
- i2QueueCommands(PTYPE_BYPASS, pCh, 0, 2, CMD_RTSDN, CMD_DTRDN);
- pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
- i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
- }
- i2QueueCommands(PTYPE_INLINE, pCh, 1, 3,
- CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
- serviceOutgoingFifo ( pCh->pMyBord );
- wake_up_interruptible ( &pCh->delta_msr_wait );
- pCh->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
- pCh->pTTY = NULL;
- wake_up_interruptible ( &pCh->open_wait );
- ip2trace (CHANN, ITRC_HANGUP, ITRC_RETURN, 0 );
- }
- /******************************************************************************/
- /******************************************************************************/
- /* Device Output Section */
- /******************************************************************************/
- /******************************************************************************/
- /******************************************************************************/
- /* Function: ip2_write() */
- /* Parameters: Pointer to tty structure */
- /* Flag denoting data is in user (1) or kernel (0) space */
- /* Pointer to data */
- /* Number of bytes to write */
- /* Returns: Number of bytes actually written */
- /* */
- /* Description: (MANDATORY) */
- /* */
- /* */
- /******************************************************************************/
- static int
- ip2_write( PTTY tty, int user, const unsigned char *pData, int count)
- {
- i2ChanStrPtr pCh = tty->driver_data;
- int bytesSent = 0;
- unsigned long flags;
- ip2trace (CHANN, ITRC_WRITE, ITRC_ENTER, 2, count, -1 );
- /* Flush out any buffered data left over from ip2_putchar() calls. */
- ip2_flush_chars( tty );
- /* This is the actual move bit. Make sure it does what we need!!!!! */
- WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- bytesSent = i2Output( pCh, pData, count, user );
- WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- ip2trace (CHANN, ITRC_WRITE, ITRC_RETURN, 1, bytesSent );
- return bytesSent > 0 ? bytesSent : 0;
- }
- /******************************************************************************/
- /* Function: ip2_putchar() */
- /* Parameters: Pointer to tty structure */
- /* Character to write */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_putchar( PTTY tty, unsigned char ch )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- unsigned long flags;
- // ip2trace (CHANN, ITRC_PUTC, ITRC_ENTER, 1, ch );
- WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- pCh->Pbuf[pCh->Pbuf_stuff++] = ch;
- if ( pCh->Pbuf_stuff == sizeof pCh->Pbuf ) {
- WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- ip2_flush_chars( tty );
- } else
- WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- // ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch );
- }
- /******************************************************************************/
- /* Function: ip2_flush_chars() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /******************************************************************************/
- static void
- ip2_flush_chars( PTTY tty )
- {
- int strip;
- i2ChanStrPtr pCh = tty->driver_data;
- unsigned long flags;
- WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- if ( pCh->Pbuf_stuff ) {
- // ip2trace (CHANN, ITRC_PUTC, 10, 1, strip );
- //
- // We may need to restart i2Output if it does not fullfill this request
- //
- strip = i2Output( pCh, pCh->Pbuf, pCh->Pbuf_stuff, 0 );
- if ( strip != pCh->Pbuf_stuff ) {
- memmove( pCh->Pbuf, &pCh->Pbuf[strip], pCh->Pbuf_stuff - strip );
- }
- pCh->Pbuf_stuff -= strip;
- }
- WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- }
- /******************************************************************************/
- /* Function: ip2_write_room() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Number of bytes that the driver can accept */
- /* */
- /* Description: */
- /* */
- /******************************************************************************/
- static int
- ip2_write_room ( PTTY tty )
- {
- int bytesFree;
- i2ChanStrPtr pCh = tty->driver_data;
- unsigned long flags;
- READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- bytesFree = i2OutputFree( pCh ) - pCh->Pbuf_stuff;
- READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- ip2trace (CHANN, ITRC_WRITE, 11, 1, bytesFree );
- return ((bytesFree > 0) ? bytesFree : 0);
- }
- /******************************************************************************/
- /* Function: ip2_chars_in_buf() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Number of bytes queued for transmission */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static int
- ip2_chars_in_buf ( PTTY tty )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- int rc;
- unsigned long flags;
- ip2trace (CHANN, ITRC_WRITE, 12, 1, pCh->Obuf_char_count + pCh->Pbuf_stuff );
- #ifdef IP2DEBUG_WRITE
- printk (KERN_DEBUG "IP2: chars in buffer = %d (%d,%d)n",
- pCh->Obuf_char_count + pCh->Pbuf_stuff,
- pCh->Obuf_char_count, pCh->Pbuf_stuff );
- #endif
- READ_LOCK_IRQSAVE(&pCh->Obuf_spinlock,flags);
- rc = pCh->Obuf_char_count;
- READ_UNLOCK_IRQRESTORE(&pCh->Obuf_spinlock,flags);
- READ_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- rc += pCh->Pbuf_stuff;
- READ_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- return rc;
- }
- /******************************************************************************/
- /* Function: ip2_flush_buffer() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_flush_buffer( PTTY tty )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- unsigned long flags;
- ip2trace (CHANN, ITRC_FLUSH, ITRC_ENTER, 0 );
- #ifdef IP2DEBUG_WRITE
- printk (KERN_DEBUG "IP2: flush buffern" );
- #endif
- WRITE_LOCK_IRQSAVE(&pCh->Pbuf_spinlock,flags);
- pCh->Pbuf_stuff = 0;
- WRITE_UNLOCK_IRQRESTORE(&pCh->Pbuf_spinlock,flags);
- i2FlushOutput( pCh );
- ip2_owake(tty);
- ip2trace (CHANN, ITRC_FLUSH, ITRC_RETURN, 0 );
- }
- /******************************************************************************/
- /* Function: ip2_wait_until_sent() */
- /* Parameters: Pointer to tty structure */
- /* Timeout for wait. */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This function is used in place of the normal tty_wait_until_sent, which */
- /* only waits for the driver buffers to be empty (or rather, those buffers */
- /* reported by chars_in_buffer) which doesn't work for IP2 due to the */
- /* indeterminate number of bytes buffered on the board. */
- /******************************************************************************/
- static void
- ip2_wait_until_sent ( PTTY tty, int timeout )
- {
- int i = jiffies;
- i2ChanStrPtr pCh = tty->driver_data;
- tty_wait_until_sent(tty, timeout );
- if ( (i = timeout - (jiffies -i)) > 0)
- i2DrainOutput( pCh, i );
- }
- /******************************************************************************/
- /******************************************************************************/
- /* Device Input Section */
- /******************************************************************************/
- /******************************************************************************/
- /******************************************************************************/
- /* Function: ip2_throttle() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_throttle ( PTTY tty )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- #ifdef IP2DEBUG_READ
- printk (KERN_DEBUG "IP2: throttlen" );
- #endif
- /*
- * Signal the poll/interrupt handlers not to forward incoming data to
- * the line discipline. This will cause the buffers to fill up in the
- * library and thus cause the library routines to send the flow control
- * stuff.
- */
- pCh->throttled = 1;
- }
- /******************************************************************************/
- /* Function: ip2_unthrottle() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_unthrottle ( PTTY tty )
- {
- i2ChanStrPtr pCh = tty->driver_data;
- unsigned long flags;
- #ifdef IP2DEBUG_READ
- printk (KERN_DEBUG "IP2: unthrottlen" );
- #endif
- /* Pass incoming data up to the line discipline again. */
- pCh->throttled = 0;
- i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
- serviceOutgoingFifo( pCh->pMyBord );
- READ_LOCK_IRQSAVE(&pCh->Ibuf_spinlock,flags)
- if ( pCh->Ibuf_stuff != pCh->Ibuf_strip ) {
- READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
- #ifdef IP2DEBUG_READ
- printk (KERN_DEBUG "i2Input called from unthrottlen" );
- #endif
- i2Input( pCh );
- } else
- READ_UNLOCK_IRQRESTORE(&pCh->Ibuf_spinlock,flags)
- }
- static void
- ip2_start ( PTTY tty )
- {
- i2ChanStrPtr pCh = DevTable[MINOR(tty->device)];
- i2QueueCommands(PTYPE_BYPASS, pCh, 0, 1, CMD_RESUME);
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_UNSUSPEND);
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_RESUME);
- #ifdef IP2DEBUG_WRITE
- printk (KERN_DEBUG "IP2: start txn" );
- #endif
- }
- static void
- ip2_stop ( PTTY tty )
- {
- i2ChanStrPtr pCh = DevTable[MINOR(tty->device)];
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_SUSPEND);
- #ifdef IP2DEBUG_WRITE
- printk (KERN_DEBUG "IP2: stop txn" );
- #endif
- }
- /******************************************************************************/
- /* Device Ioctl Section */
- /******************************************************************************/
- /******************************************************************************/
- /* Function: ip2_ioctl() */
- /* Parameters: Pointer to tty structure */
- /* Pointer to file structure */
- /* Command */
- /* Argument */
- /* Returns: Success or failure */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static int
- ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
- {
- wait_queue_t wait;
- i2ChanStrPtr pCh = DevTable[MINOR(tty->device)];
- struct async_icount cprev, cnow; /* kernel counter temps */
- struct serial_icounter_struct *p_cuser; /* user space */
- int rc = 0;
- unsigned long flags;
- if ( pCh == NULL ) {
- return -ENODEV;
- }
- ip2trace (CHANN, ITRC_IOCTL, ITRC_ENTER, 2, cmd, arg );
- #ifdef IP2DEBUG_IOCTL
- printk(KERN_DEBUG "IP2: ioctl cmd (%x), arg (%lx)n", cmd, arg );
- #endif
- switch(cmd) {
- case TIOCGSERIAL:
- ip2trace (CHANN, ITRC_IOCTL, 2, 1, rc );
- rc = get_serial_info(pCh, (struct serial_struct *) arg);
- if (rc)
- return rc;
- break;
- case TIOCSSERIAL:
- ip2trace (CHANN, ITRC_IOCTL, 3, 1, rc );
- rc = set_serial_info(pCh, (struct serial_struct *) arg);
- if (rc)
- return rc;
- break;
- case TCXONC:
- rc = tty_check_change(tty);
- if (rc)
- return rc;
- switch (arg) {
- case TCOOFF:
- //return -ENOIOCTLCMD;
- break;
- case TCOON:
- //return -ENOIOCTLCMD;
- break;
- case TCIOFF:
- if (STOP_CHAR(tty) != __DISABLED_CHAR) {
- i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
- CMD_XMIT_NOW(STOP_CHAR(tty)));
- }
- break;
- case TCION:
- if (START_CHAR(tty) != __DISABLED_CHAR) {
- i2QueueCommands( PTYPE_BYPASS, pCh, 100, 1,
- CMD_XMIT_NOW(START_CHAR(tty)));
- }
- break;
- default:
- return -EINVAL;
- }
- return 0;
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- rc = tty_check_change(tty);
- ip2trace (CHANN, ITRC_IOCTL, 4, 1, rc );
- if (!rc) {
- ip2_wait_until_sent(tty,0);
- if (!arg) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SEND_BRK(250));
- serviceOutgoingFifo( pCh->pMyBord );
- }
- }
- break;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- rc = tty_check_change(tty);
- ip2trace (CHANN, ITRC_IOCTL, 5, 1, rc );
- if (!rc) {
- ip2_wait_until_sent(tty,0);
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1,
- CMD_SEND_BRK(arg ? arg*100 : 250));
- serviceOutgoingFifo ( pCh->pMyBord );
- }
- break;
- case TIOCGSOFTCAR:
- ip2trace (CHANN, ITRC_IOCTL, 6, 1, rc );
- PUT_USER(rc,C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
- if (rc)
- return rc;
- break;
- case TIOCSSOFTCAR:
- ip2trace (CHANN, ITRC_IOCTL, 7, 1, rc );
- GET_USER(rc,arg,(unsigned long *) arg);
- if (rc)
- return rc;
- tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL)
- | (arg ? CLOCAL : 0));
-
- break;
- case TIOCMGET:
- ip2trace (CHANN, ITRC_IOCTL, 8, 1, rc );
- /*
- FIXME - the following code is causing a NULL pointer dereference in
- 2.3.51 in an interrupt handler. It's suppose to prompt the board
- to return the DSS signal status immediately. Why doesn't it do
- the same thing in 2.2.14?
- */
- /* This thing is still busted in the 1.2.12 driver on 2.4.x
- and even hoses the serial console so the oops can be trapped.
- //|=mhw=|// */
- #ifdef ENABLE_DSSNOW
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DSS_NOW);
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&pCh->dss_now_wait, &wait);
- set_current_state( TASK_INTERRUPTIBLE );
- serviceOutgoingFifo( pCh->pMyBord );
- schedule();
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->dss_now_wait, &wait);
- if (signal_pending(current)) {
- return -EINTR;
- }
- #endif
- PUT_USER(rc,
- ((pCh->dataSetOut & I2_RTS) ? TIOCM_RTS : 0)
- | ((pCh->dataSetOut & I2_DTR) ? TIOCM_DTR : 0)
- | ((pCh->dataSetIn & I2_DCD) ? TIOCM_CAR : 0)
- | ((pCh->dataSetIn & I2_RI) ? TIOCM_RNG : 0)
- | ((pCh->dataSetIn & I2_DSR) ? TIOCM_DSR : 0)
- | ((pCh->dataSetIn & I2_CTS) ? TIOCM_CTS : 0),
- (unsigned int *) arg);
- break;
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- ip2trace (CHANN, ITRC_IOCTL, 9, 0 );
- rc = set_modem_info(pCh, cmd, (unsigned int *) arg);
- break;
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change - mask
- * passed in arg for lines of interest (use |'ed TIOCM_RNG/DSR/CD/CTS
- * for masking). Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- save_flags(flags);cli();
- cprev = pCh->icount; /* note the counters on entry */
- restore_flags(flags);
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 4,
- CMD_DCD_REP, CMD_CTS_REP, CMD_DSR_REP, CMD_RI_REP);
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&pCh->delta_msr_wait, &wait);
- set_current_state( TASK_INTERRUPTIBLE );
- serviceOutgoingFifo( pCh->pMyBord );
- for(;;) {
- ip2trace (CHANN, ITRC_IOCTL, 10, 0 );
- schedule();
- ip2trace (CHANN, ITRC_IOCTL, 11, 0 );
- /* see if a signal did it */
- if (signal_pending(current)) {
- rc = -ERESTARTSYS;
- break;
- }
- save_flags(flags);cli();
- cnow = pCh->icount; /* atomic copy */
- restore_flags(flags);
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
- rc = -EIO; /* no change => rc */
- break;
- }
- if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
- rc = 0;
- break;
- }
- cprev = cnow;
- }
- set_current_state( TASK_RUNNING );
- remove_wait_queue(&pCh->delta_msr_wait, &wait);
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 3,
- CMD_CTS_NREP, CMD_DSR_NREP, CMD_RI_NREP);
- if ( ! (pCh->flags & ASYNC_CHECK_CD)) {
- i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DCD_NREP);
- }
- serviceOutgoingFifo( pCh->pMyBord );
- return rc;
- break;
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for RI where
- * only 0->1 is counted. The controller is quite capable of counting
- * both, but this done to preserve compatibility with the standard
- * serial driver.
- */
- case TIOCGICOUNT:
- ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );
- save_flags(flags);cli();
- cnow = pCh->icount;
- restore_flags(flags);
- p_cuser = (struct serial_icounter_struct *) arg;
- PUT_USER(rc,cnow.cts, &p_cuser->cts);
- PUT_USER(rc,cnow.dsr, &p_cuser->dsr);
- PUT_USER(rc,cnow.rng, &p_cuser->rng);
- PUT_USER(rc,cnow.dcd, &p_cuser->dcd);
- PUT_USER(rc,cnow.rx, &p_cuser->rx);
- PUT_USER(rc,cnow.tx, &p_cuser->tx);
- PUT_USER(rc,cnow.frame, &p_cuser->frame);
- PUT_USER(rc,cnow.overrun, &p_cuser->overrun);
- PUT_USER(rc,cnow.parity, &p_cuser->parity);
- PUT_USER(rc,cnow.brk, &p_cuser->brk);
- PUT_USER(rc,cnow.buf_overrun, &p_cuser->buf_overrun);
- break;
- /*
- * The rest are not supported by this driver. By returning -ENOIOCTLCMD they
- * will be passed to the line discipline for it to handle.
- */
- case TIOCSERCONFIG:
- case TIOCSERGWILD:
- case TIOCSERGETLSR:
- case TIOCSERSWILD:
- case TIOCSERGSTRUCT:
- case TIOCSERGETMULTI:
- case TIOCSERSETMULTI:
- default:
- ip2trace (CHANN, ITRC_IOCTL, 12, 0 );
- rc = -ENOIOCTLCMD;
- break;
- }
- ip2trace (CHANN, ITRC_IOCTL, ITRC_RETURN, 0 );
- return rc;
- }
- /******************************************************************************/
- /* Function: set_modem_info() */
- /* Parameters: Pointer to channel structure */
- /* Specific ioctl command */
- /* Pointer to source for new settings */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This returns the current settings of the dataset signal inputs to the user */
- /* program. */
- /******************************************************************************/
- static int
- set_modem_info(i2ChanStrPtr pCh, unsigned cmd, unsigned int *value)
- {
- int rc;
- unsigned int arg;
- GET_USER(rc,arg,value);
- if (rc)
- return rc;
- switch(cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSUP);
- pCh->dataSetOut |= I2_RTS;
- }
- if (arg & TIOCM_DTR) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRUP);
- pCh->dataSetOut |= I2_DTR;
- }
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSDN);
- pCh->dataSetOut &= ~I2_RTS;
- }
- if (arg & TIOCM_DTR) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRDN);
- pCh->dataSetOut &= ~I2_DTR;
- }
- break;
- case TIOCMSET:
- if ( (arg & TIOCM_RTS) && !(pCh->dataSetOut & I2_RTS) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSUP);
- pCh->dataSetOut |= I2_RTS;
- } else if ( !(arg & TIOCM_RTS) && (pCh->dataSetOut & I2_RTS) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_RTSDN);
- pCh->dataSetOut &= ~I2_RTS;
- }
- if ( (arg & TIOCM_DTR) && !(pCh->dataSetOut & I2_DTR) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRUP);
- pCh->dataSetOut |= I2_DTR;
- } else if ( !(arg & TIOCM_DTR) && (pCh->dataSetOut & I2_DTR) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DTRDN);
- pCh->dataSetOut &= ~I2_DTR;
- }
- break;
- default:
- return -EINVAL;
- }
- serviceOutgoingFifo( pCh->pMyBord );
- return 0;
- }
- /******************************************************************************/
- /* Function: GetSerialInfo() */
- /* Parameters: Pointer to channel structure */
- /* Pointer to old termios structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This is to support the setserial command, and requires processing of the */
- /* standard Linux serial structure. */
- /******************************************************************************/
- static int
- get_serial_info ( i2ChanStrPtr pCh, struct serial_struct *retinfo )
- {
- struct serial_struct tmp;
- int rc;
- if ( !retinfo ) {
- return -EFAULT;
- }
- memset ( &tmp, 0, sizeof(tmp) );
- tmp.type = pCh->pMyBord->channelBtypes.bid_value[(pCh->port_index & (IP2_PORTS_PER_BOARD-1))/16];
- if (BID_HAS_654(tmp.type)) {
- tmp.type = PORT_16650;
- } else {
- tmp.type = PORT_CIRRUS;
- }
- tmp.line = pCh->port_index;
- tmp.port = pCh->pMyBord->i2eBase;
- tmp.irq = ip2config.irq[pCh->port_index/64];
- tmp.flags = pCh->flags;
- tmp.baud_base = pCh->BaudBase;
- tmp.close_delay = pCh->ClosingDelay;
- tmp.closing_wait = pCh->ClosingWaitTime;
- tmp.custom_divisor = pCh->BaudDivisor;
- COPY_TO_USER(rc,retinfo,&tmp,sizeof(*retinfo));
- return rc;
- }
- /******************************************************************************/
- /* Function: SetSerialInfo() */
- /* Parameters: Pointer to channel structure */
- /* Pointer to old termios structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This function provides support for setserial, which uses the TIOCSSERIAL */
- /* ioctl. Not all setserial parameters are relevant. If the user attempts to */
- /* change the IRQ, address or type of the port the ioctl fails. */
- /******************************************************************************/
- static int
- set_serial_info( i2ChanStrPtr pCh, struct serial_struct *new_info )
- {
- struct serial_struct ns;
- int old_flags, old_baud_divisor;
- int rc = 0;
- if ( !new_info ) {
- return -EFAULT;
- }
- COPY_FROM_USER(rc, &ns, new_info, sizeof (ns) );
- if (rc) {
- return rc;
- }
- /*
- * We don't allow setserial to change IRQ, board address, type or baud
- * base. Also line nunber as such is meaningless but we use it for our
- * array index so it is fixed also.
- */
- if ( (ns.irq != ip2config.irq[pCh->port_index])
- || ((int) ns.port != ((int) (pCh->pMyBord->i2eBase)))
- || (ns.baud_base != pCh->BaudBase)
- || (ns.line != pCh->port_index) ) {
- return -EINVAL;
- }
- old_flags = pCh->flags;
- old_baud_divisor = pCh->BaudDivisor;
- if ( !suser() ) {
- if ( ( ns.close_delay != pCh->ClosingDelay ) ||
- ( (ns.flags & ~ASYNC_USR_MASK) !=
- (pCh->flags & ~ASYNC_USR_MASK) ) ) {
- return -EPERM;
- }
- pCh->flags = (pCh->flags & ~ASYNC_USR_MASK) |
- (ns.flags & ASYNC_USR_MASK);
- pCh->BaudDivisor = ns.custom_divisor;
- } else {
- pCh->flags = (pCh->flags & ~ASYNC_FLAGS) |
- (ns.flags & ASYNC_FLAGS);
- pCh->BaudDivisor = ns.custom_divisor;
- pCh->ClosingDelay = ns.close_delay * HZ/100;
- pCh->ClosingWaitTime = ns.closing_wait * HZ/100;
- }
- if ( ( (old_flags & ASYNC_SPD_MASK) != (pCh->flags & ASYNC_SPD_MASK) )
- || (old_baud_divisor != pCh->BaudDivisor) ) {
- // Invalidate speed and reset parameters
- set_params( pCh, NULL );
- }
- return rc;
- }
- /******************************************************************************/
- /* Function: ip2_set_termios() */
- /* Parameters: Pointer to tty structure */
- /* Pointer to old termios structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_set_termios( PTTY tty, struct termios *old_termios )
- {
- i2ChanStrPtr pCh = (i2ChanStrPtr)tty->driver_data;
- #ifdef IP2DEBUG_IOCTL
- printk (KERN_DEBUG "IP2: set termios %pn", old_termios );
- #endif
- set_params( pCh, old_termios );
- }
- /******************************************************************************/
- /* Function: ip2_set_line_discipline() */
- /* Parameters: Pointer to tty structure */
- /* Returns: Nothing */
- /* */
- /* Description: Does nothing */
- /* */
- /* */
- /******************************************************************************/
- static void
- ip2_set_line_discipline ( PTTY tty )
- {
- #ifdef IP2DEBUG_IOCTL
- printk (KERN_DEBUG "IP2: set line disciplinen" );
- #endif
- ip2trace (((i2ChanStrPtr)tty->driver_data)->port_index, ITRC_IOCTL, 16, 0 );
- }
- /******************************************************************************/
- /* Function: SetLine Characteristics() */
- /* Parameters: Pointer to channel structure */
- /* Returns: Nothing */
- /* */
- /* Description: */
- /* This routine is called to update the channel structure with the new line */
- /* characteristics, and send the appropriate commands to the board when they */
- /* change. */
- /******************************************************************************/
- static void
- set_params( i2ChanStrPtr pCh, struct termios *o_tios )
- {
- tcflag_t cflag, iflag, lflag;
- char stop_char, start_char;
- struct termios dummy;
- lflag = pCh->pTTY->termios->c_lflag;
- cflag = pCh->pTTY->termios->c_cflag;
- iflag = pCh->pTTY->termios->c_iflag;
- if (o_tios == NULL) {
- dummy.c_lflag = ~lflag;
- dummy.c_cflag = ~cflag;
- dummy.c_iflag = ~iflag;
- o_tios = &dummy;
- }
- {
- switch ( cflag & CBAUD ) {
- case B0:
- i2QueueCommands( PTYPE_BYPASS, pCh, 100, 2, CMD_RTSDN, CMD_DTRDN);
- pCh->dataSetOut &= ~(I2_DTR | I2_RTS);
- i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_PAUSE(25));
- pCh->pTTY->termios->c_cflag |= (CBAUD & o_tios->c_cflag);
- goto service_it;
- break;
- case B38400:
- /*
- * This is the speed that is overloaded with all the other high
- * speeds, depending upon the flag settings.
- */
- if ( ( pCh->flags & ASYNC_SPD_MASK ) == ASYNC_SPD_HI ) {
- pCh->speed = CBR_57600;
- } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI ) {
- pCh->speed = CBR_115200;
- } else if ( (pCh->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST ) {
- pCh->speed = CBR_C1;
- } else {
- pCh->speed = CBR_38400;
- }
- break;
- case B50: pCh->speed = CBR_50; break;
- case B75: pCh->speed = CBR_75; break;
- case B110: pCh->speed = CBR_110; break;
- case B134: pCh->speed = CBR_134; break;
- case B150: pCh->speed = CBR_150; break;
- case B200: pCh->speed = CBR_200; break;
- case B300: pCh->speed = CBR_300; break;
- case B600: pCh->speed = CBR_600; break;
- case B1200: pCh->speed = CBR_1200; break;
- case B1800: pCh->speed = CBR_1800; break;
- case B2400: pCh->speed = CBR_2400; break;
- case B4800: pCh->speed = CBR_4800; break;
- case B9600: pCh->speed = CBR_9600; break;
- case B19200: pCh->speed = CBR_19200; break;
- case B57600: pCh->speed = CBR_57600; break;
- case B115200: pCh->speed = CBR_115200; break;
- case B153600: pCh->speed = CBR_153600; break;
- case B230400: pCh->speed = CBR_230400; break;
- case B307200: pCh->speed = CBR_307200; break;
- case B460800: pCh->speed = CBR_460800; break;
- case B921600: pCh->speed = CBR_921600; break;
- default: pCh->speed = CBR_9600; break;
- }
- if ( pCh->speed == CBR_C1 ) {
- // Process the custom speed parameters.
- int bps = pCh->BaudBase / pCh->BaudDivisor;
- if ( bps == 921600 ) {
- pCh->speed = CBR_921600;
- } else {
- bps = bps/10;
- i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_BAUD_DEF1(bps) );
- }
- }
- i2QueueCommands( PTYPE_INLINE, pCh, 100, 1, CMD_SETBAUD(pCh->speed));
-
- i2QueueCommands ( PTYPE_INLINE, pCh, 100, 2, CMD_DTRUP, CMD_RTSUP);
- pCh->dataSetOut |= (I2_DTR | I2_RTS);
- }
- if ( (CSTOPB & cflag) ^ (CSTOPB & o_tios->c_cflag))
- {
- i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
- CMD_SETSTOP( ( cflag & CSTOPB ) ? CST_2 : CST_1));
- }
- if (((PARENB|PARODD) & cflag) ^ ((PARENB|PARODD) & o_tios->c_cflag))
- {
- i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1,
- CMD_SETPAR(
- (cflag & PARENB ? (cflag & PARODD ? CSP_OD : CSP_EV) : CSP_NP)
- )
- );
- }
- /* byte size and parity */
- if ( (CSIZE & cflag)^(CSIZE & o_tios->c_cflag))
- {
- int datasize;
- switch ( cflag & CSIZE ) {
- case CS5: datasize = CSZ_5; break;
- case CS6: datasize = CSZ_6; break;
- case CS7: datasize = CSZ_7; break;
- case CS8: datasize = CSZ_8; break;
- default: datasize = CSZ_5; break; /* as per serial.c */
- }
- i2QueueCommands ( PTYPE_INLINE, pCh, 100, 1, CMD_SETBITS(datasize) );
- }
- /* Process CTS flow control flag setting */
- if ( (cflag & CRTSCTS) ) {
- i2QueueCommands(PTYPE_INLINE, pCh, 100,
- 2, CMD_CTSFL_ENAB, CMD_RTSFL_ENAB);
- } else {
- i2QueueCommands(PTYPE_INLINE, pCh, 100,
- 2, CMD_CTSFL_DSAB, CMD_RTSFL_DSAB);
- }
- //
- // Process XON/XOFF flow control flags settings
- //
- stop_char = STOP_CHAR(pCh->pTTY);
- start_char = START_CHAR(pCh->pTTY);
- //////////// can't be