/* * * (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 consistent with kernel style // Thanks to Andreas Dilger 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.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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ip2types.h" #include "ip2trace.h" #include "ip2ioctl.h" #include "ip2.h" #include "i2ellis.h" #include "i2lib.h" /***************** * /proc/ip2mem * *****************/ #include static int ip2_read_procmem(char *, char **, off_t, int); static 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"; static char *pcIpl = "ip2ipl"; /* Serial subtype definitions */ #define SERIAL_TYPE_NORMAL 1 // 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 */ /* Private (static) functions */ static int ip2_open(PTTY, struct file *); static void ip2_close(PTTY, struct file *); static int ip2_write(PTTY, 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 int ip2_tiocmget(struct tty_struct *tty, struct file *file); static int ip2_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); static void set_irq(int, int); static void ip2_interrupt_bh(i2eBordStrPtr pB); static irqreturn_t 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 void do_input(void *p); static void do_status(void *p); static void ip2_wait_until_sent(PTTY,int); static void set_params (i2ChanStrPtr, struct termios *); static int get_serial_info(i2ChanStrPtr, struct serial_struct __user *); static int set_serial_info(i2ChanStrPtr, struct serial_struct __user *); static ssize_t ip2_ipl_read(struct file *, char __user *, size_t, loff_t *); static ssize_t ip2_ipl_write(struct file *, const char __user *, 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 __user *, int); static int DumpFifoBuffer( char __user *, int); static void ip2_init_board(int); static unsigned short find_eisa_board(int); /***************/ /* Static Data */ /***************/ static struct tty_driver *ip2_tty_driver; /* 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]; /* 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 DEFINE_TIMER(PollTimer, ip2_poll, 0, 0); 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 -> %s\n", \ tty->name,(pCh->flags),ip2_tty_driver->refcount, \ tty->count,/*GET_USE_COUNT(module)*/0,s) #else #define DBG_CNT(s) #endif /********/ /* Code */ /********/ #include "i2ellis.c" /* Extremely low-level interface services */ #include "i2cmd.c" /* Standard loadware command definitions */ #include "i2lib.c" /* High level interface services */ /* Configuration area for modprobe */ MODULE_AUTHOR("Doug McNash"); MODULE_DESCRIPTION("Computone IntelliPort Plus Driver"); 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}; /* for sysfs class support */ static struct class *ip2_class; // 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 %s\n", 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 ); class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i)); devfs_remove("ip2/ipl%d", i); class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1)); devfs_remove("ip2/stat%d", i); } /* 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]); } } class_destroy(ip2_class); devfs_remove("ip2"); if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) { printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err); } put_tty_driver(ip2_tty_driver); if ( ( err = unregister_chrdev ( IP2_IPL_MAJOR, pcIpl ) ) ) { 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; #ifdef CONFIG_PCI if (ip2config.type[i] == PCI && ip2config.pci_dev[i]) { pci_disable_device(ip2config.pci_dev[i]); ip2config.pci_dev[i] = NULL; } #endif 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 Unloaded\n" ); #endif } #endif /* MODULE */ static struct tty_operations ip2_ops = { .open = ip2_open, .close = ip2_close, .write = ip2_write, .put_char = ip2_putchar, .flush_chars = ip2_flush_chars, .write_room = ip2_write_room, .chars_in_buffer = ip2_chars_in_buf, .flush_buffer = ip2_flush_buffer, .ioctl = ip2_ioctl, .throttle = ip2_throttle, .unthrottle = ip2_unthrottle, .set_termios = ip2_set_termios, .set_ldisc = ip2_set_line_discipline, .stop = ip2_stop, .start = ip2_start, .hangup = ip2_hangup, .read_proc = ip2_read_proc, .tiocmget = ip2_tiocmget, .tiocmset = ip2_tiocmset, }; /******************************************************************************/ /* 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 ip2_loadmain(int *iop, int *irqp, unsigned char *firmware, int firmsize) { int i, j, box; int err = 0; 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 %s\n", 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 loaded\n" ); return 0; } loaded++; ip2_tty_driver = alloc_tty_driver(IP2_MAX_PORTS); if (!ip2_tty_driver) return -ENOMEM; /* Initialise the iiEllis subsystem. */ iiEllisInit(); /* Initialize arrays. */ memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable ); memset( DevTable, 0, sizeof DevTable ); /* 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 %x\n", 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) specified\n",ip2config.irq[i]); ip2config.irq[i] = 0;// 0 is polling and is valid in that sense } } break; case PCI: #ifdef CONFIG_PCI { 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; if (pci_enable_device(pci_dev_i)) { printk( KERN_ERR "IP2: can't enable PCI device at %s\n", pci_name(pci_dev_i)); break; } ip2config.type[i] = PCI; ip2config.pci_dev[i] = pci_dev_i; 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 error\n"); } // 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_dev_i->irq; } else { // ann error ip2config.addr[i] = 0; if (status == PCIBIOS_DEVICE_NOT_FOUND) { printk( KERN_ERR "IP2: PCI board %d not found\n", i ); } else { printk( KERN_ERR "IP2: PCI error 0x%x \n", status ); } } } #else printk( KERN_ERR "IP2: PCI card specified but PCI support not\n"); 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 error\n"); } } } 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 ); ip2_tty_driver->owner = THIS_MODULE; ip2_tty_driver->name = "ttyF"; ip2_tty_driver->devfs_name = "tts/F"; ip2_tty_driver->driver_name = pcDriver_name; ip2_tty_driver->major = IP2_TTY_MAJOR; ip2_tty_driver->minor_start = 0; 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; ip2_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS; tty_set_operations(ip2_tty_driver, &ip2_ops); 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); put_tty_driver(ip2_tty_driver); return -EINVAL; } else /* Register the IPL driver. */ if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) ) { printk(KERN_ERR "IP2: failed to register IPL device (%d)\n", err ); } else { /* create the sysfs class */ ip2_class = class_create(THIS_MODULE, "ip2"); if (IS_ERR(ip2_class)) { err = PTR_ERR(ip2_class); goto out_chrdev; } } /* 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_procmem\n"); } else { ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 ); /* Register the interrupt handler or poll handler, depending upon the * specified interrupt. */ for( i = 0; i < IP2_MAX_BOARDS; ++i ) { if ( 0 == ip2config.addr[i] ) { continue; } if ( NULL != ( pB = i2BoardPtrTable[i] ) ) { class_device_create(ip2_class, NULL, MKDEV(IP2_IPL_MAJOR, 4 * i), NULL, "ipl%d", i); err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i), S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, "ip2/ipl%d", i); if (err) { class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i)); goto out_class; } class_device_create(ip2_class, NULL, MKDEV(IP2_IPL_MAJOR, 4 * i + 1), NULL, "stat%d", i); err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1), S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR, "ip2/stat%d", i); if (err) { class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1)); goto out_class; } for ( box = 0; box < ABS_MAX_BOXES; ++box ) { for ( j = 0; j < ABS_BIGGEST_BOX; ++j ) { if ( pB->i2eChannelMap[box] & (1 << j) ) { tty_register_device(ip2_tty_driver, j + ABS_BIGGEST_BOX * (box+i*ABS_MAX_BOXES), NULL); } } } } 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: polling\n"); } } 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 %d\n",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 ); goto out; out_class: class_destroy(ip2_class); out_chrdev: unregister_chrdev(IP2_IPL_MAJOR, "ip2"); out: return err; } EXPORT_SYMBOL(ip2_loadmain); /******************************************************************************/ /* 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; 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 %d\n", pB->i2eBase, pB->i2eError ); goto err_initialize; } printk(KERN_INFO "IP2: Board %d: addr=0x%x irq=%d\n", boardnum + 1, ip2config.addr[boardnum], ip2config.irq[boardnum] ); if (!request_region( ip2config.addr[boardnum], 8, pcName )) { printk(KERN_ERR "IP2: bad addr=0x%x\n", 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 loadware\n" ); goto err_release_region; } else { printk ( KERN_INFO "IP2: fv=%d.%d.%d lv=%d.%d.%d\n", 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 = %x\n", 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-4\n" ); nports = 4; break; case POR_ID_II_8: /* IntelliPort-II, 8-port using standard brick. */ printk ( KERN_INFO "IP2: ISA-8 std\n" ); nports = 8; break; case POR_ID_II_8R: /* IntelliPort-II, 8-port using RJ11's (no CTS) */ printk ( KERN_INFO "IP2: ISA-8 RJ11\n" ); 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: %d\n",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 bit\n", 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: %d\n",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: INIT_WORK(&pB->tqueue_interrupt, (void(*)(void*)) ip2_interrupt_bh, 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 controllers\n" ); } #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 %s\n", 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(void) { 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 irqreturn_t ip2_interrupt(int irq, void *dev_id, struct pt_regs * regs) { int i; i2eBordStrPtr pB; int handled = 0; 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) ) { handled = 1; #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. schedule_work(&pB->tqueue_interrupt); // Make sure the immediate queue is flagged to fire. } #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 ); return IRQ_RETVAL(handled); } /******************************************************************************/ /* 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 void do_input(void *p) { i2ChanStrPtr pCh = p; 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 void do_status(void *p) { i2ChanStrPtr pCh = p; 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 separate path // The intelligent board does this stuff as setup { char brkf = TTY_NORMAL; unsigned char brkc = '\0'; unsigned char tmp; if ( (status & I2_BRK) ) { brkf = TTY_BREAK; brkc = '\0'; } 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->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 structure\n" ); } 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[tty->index]; ip2trace (tty->index, 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; #ifdef IP2DEBUG_OPEN printk(KERN_DEBUG \ "IP2:open(tty=%p,pFile=%p):dev=%s,ch=%d,idx=%d\n", tty, pFile, tty->name, 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); /* * 3. Handle a non-blocking open of a normal port. */ if ( (pFile->f_flags & O_NONBLOCK) || (tty->flags & (1<flags |= ASYNC_NORMAL_ACTIVE; goto noblock; } /* * 4. Now loop waiting for the port to be free and carrier present * (if required). */ if ( tty->termios->c_cflag & CLOCAL ) do_clocal = 1; #ifdef IP2DEBUG_OPEN printk(KERN_DEBUG "OpenBlock: do_clocal = %d\n", do_clocal); #endif ++pCh->wopen; init_waitqueue_entry(&wait, current); add_wait_queue(&pCh->open_wait, &wait); for(;;) { 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_CLOSING) && (do_clocal || (pCh->dataSetIn & I2_DCD) )) { rc = 0; break; } #ifdef IP2DEBUG_OPEN printk(KERN_DEBUG "ASYNC_CLOSING = %s\n", (pCh->flags & ASYNC_CLOSING)?"True":"False"); printk(KERN_DEBUG "OpenBlock: waiting for CD or signal\n"); #endif ip2trace (CHANN, ITRC_OPEN, 3, 2, 0, (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); /* Now we must send the termios settings to the loadware */ set_params( pCh, NULL ); } /* * 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 completed\n" ); #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 %s:\n",tty->name); #endif if ( tty_hung_up_p ( pFile ) ) { ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 ); return; } if ( tty->count > 1 ) { /* not the last close */ ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 ); return; } pCh->flags |= ASYNC_CLOSING; // last close actually 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) { msleep_interruptible(jiffies_to_msecs(pCh->ClosingDelay)); } wake_up_interruptible(&pCh->open_wait); } pCh->flags &=~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); wake_up_interruptible(&pCh->close_wait); #ifdef IP2DEBUG_OPEN DBG_CNT("ip2_close: after wakeups--"); #endif 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; 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, 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, 0 ); 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 buffer\n" ); #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: throttle\n" ); #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()