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3422 3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454 3455 3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 | /* * * (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. // // Done: // // 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 = "1.2.11"; /* String constants for port names */ static char *pcDriver_name = "ip2"; #ifdef CONFIG_DEVFS_FS static char *pcTty = "ttf/%d"; static char *pcCallout = "cuf/%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 *); void ip2trace(unsigned short,unsigned char,unsigned char,unsigned long,...); 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 -> %s\n", \ 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 %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 ); #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 Unloaded\n" ); #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; #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 ); #endif /* 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++; /* 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 %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 #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 error\n"); } 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 found\n", 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 error\n"); } 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 found\n", i ); } else { pcibios_strerror(status); } } } #endif /* ! 2_0_X */ #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 ); } } #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 ); #endif /* 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; #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 ); #endif /* 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_procmem\n"); } else { #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 ); #endif /* 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: 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 */ } } } #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 ); #endif 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 %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 (0 != ( rc = check_region( ip2config.addr[boardnum], 8))) { printk(KERN_ERR "IP2: bad addr=0x%x rc = %d\n", ip2config.addr[boardnum], rc ); goto err_initialize; } request_region( ip2config.addr[boardnum], 8, pcName ); 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: 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 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() { 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; #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq ); #endif /* 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; #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 ); #endif } /******************************************************************************/ /* 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) { #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 ); #endif 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; #ifdef IP2DEBUG_TRACE ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 ); #endif } static inline void do_input( i2ChanStrPtr pCh ) { unsigned long flags; #ifdef IP2DEBUG_TRACE ip2trace(CHANN, ITRC_INPUT, 21, 0 ); #endif // 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 { #ifdef IP2DEBUG_TRACE ip2trace(CHANN, ITRC_INPUT, 22, 0 ); #endif 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) ); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_STATUS, 21, 1, status ); #endif 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 = '\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->flags & ASYNC_CALLOUT_ACTIVE) ) { if (pCh->pTTY && (!(pCh->pTTY->termios->c_cflag & CLOCAL)) ) { tty_hangup( pCh->pTTY ); } } } } #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_STATUS, 26, 0 ); #endif } /******************************************************************************/ /* 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[MINOR(tty->device)]; #ifdef IP2DEBUG_TRACE ip2trace (MINOR(tty->device), ITRC_OPEN, ITRC_ENTER, 0 ); #endif 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=%d\n", 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 = %d\n", 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 = %s\n", (pCh->flags & ASYNC_CALLOUT_ACTIVE)?"True":"False"); printk(KERN_DEBUG "ASYNC_CLOSING = %s\n", (pCh->flags & ASYNC_CLOSING)?"True":"False"); printk(KERN_DEBUG "OpenBlock: waiting for CD or signal\n"); #endif #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_OPEN, 3, 2, (pCh->flags & ASYNC_CALLOUT_ACTIVE), (pCh->flags & ASYNC_CLOSING) ); #endif /* 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? #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_OPEN, 4, 0 ); #endif 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 completed\n" ); #endif serviceOutgoingFifo( pCh->pMyBord ); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_OPEN, ITRC_RETURN, 0 ); #endif 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; } #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_CLOSE, ITRC_ENTER, 0 ); #endif #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; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_CLOSE, 2, 1, 2 ); #endif return; } if ( tty->count > 1 ) { /* not the last close */ MOD_DEC_USE_COUNT; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_CLOSE, 2, 1, 3 ); #endif 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; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_CLOSE, ITRC_RETURN, 1, 1 ); #endif 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; } #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_HANGUP, ITRC_ENTER, 0 ); #endif 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 ); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_HANGUP, ITRC_RETURN, 0 ); #endif } /******************************************************************************/ /******************************************************************************/ /* 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; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_WRITE, ITRC_ENTER, 2, count, -1 ); #endif /* 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); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_WRITE, ITRC_RETURN, 1, bytesSent ); #endif 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; #ifdef IP2DEBUG_TRACE // ip2trace (CHANN, ITRC_PUTC, ITRC_ENTER, 1, ch ); #endif 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); #ifdef IP2DEBUG_TRACE // ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch ); #endif } /******************************************************************************/ /* 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 ) { #ifdef IP2DEBUG_TRACE // ip2trace (CHANN, ITRC_PUTC, 10, 1, strip ); #endif // // 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); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_WRITE, 11, 1, bytesFree ); #endif 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; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_WRITE, 12, 1, pCh->Obuf_char_count + pCh->Pbuf_stuff ); #endif #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; #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_FLUSH, ITRC_ENTER, 0 ); #endif #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); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_FLUSH, ITRC_RETURN, 0 ); #endif } /******************************************************************************/ /* 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() */ /* 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: unthrottle\n" ); #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 unthrottle\n" ); #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 tx\n" ); #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 tx\n" ); #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; } #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, ITRC_ENTER, 2, cmd, arg ); #endif #ifdef IP2DEBUG_IOCTL printk(KERN_DEBUG "IP2: ioctl cmd (%x), arg (%lx)\n", cmd, arg ); #endif switch(cmd) { case TIOCGSERIAL: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 2, 1, rc ); #endif rc = get_serial_info(pCh, (struct serial_struct *) arg); if (rc) return rc; break; case TIOCSSERIAL: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 3, 1, rc ); #endif 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); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 4, 1, rc ); #endif 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); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 5, 1, rc ); #endif 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: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 6, 1, rc ); #endif PUT_USER(rc,C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg); if (rc) return rc; break; case TIOCSSOFTCAR: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 7, 1, rc ); #endif 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: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 8, 1, rc ); #endif /* 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: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 9, 0 ); #endif 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(;;) { #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 10, 0 ); #endif schedule(); #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 11, 0 ); #endif /* 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: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc ); #endif 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: #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, 12, 0 ); #endif rc = -ENOIOCTLCMD; break; } #ifdef IP2DEBUG_TRACE ip2trace (CHANN, ITRC_IOCTL, ITRC_RETURN, 0 ); #endif 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 %p\n", 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 discipline\n" ); #endif #ifdef IP2DEBUG_TRACE ip2trace (((i2ChanStrPtr)tty->driver_data)->port_index, ITRC_IOCTL, 16, 0 ); #endif } /******************************************************************************/ /* 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 \000 if (stop_char == __DISABLED_CHAR ) { stop_char = ~__DISABLED_CHAR; } if (start_char == __DISABLED_CHAR ) { start_char = ~__DISABLED_CHAR; } ///////////////////////////////// if ( o_tios->c_cc[VSTART] != start_char ) { i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXON(start_char)); i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXON(start_char)); } if ( o_tios->c_cc[VSTOP] != stop_char ) { i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_DEF_IXOFF(stop_char)); i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DEF_OXOFF(stop_char)); } if (stop_char == __DISABLED_CHAR ) { stop_char = ~__DISABLED_CHAR; //TEST123 goto no_xoff; } if ((iflag & (IXOFF))^(o_tios->c_iflag & (IXOFF))) { if ( iflag & IXOFF ) { // Enable XOFF output flow control i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_XON)); } else { // Disable XOFF output flow control no_xoff: i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_OXON_OPT(COX_NONE)); } } if (start_char == __DISABLED_CHAR ) { goto no_xon; } if ((iflag & (IXON|IXANY)) ^ (o_tios->c_iflag & (IXON|IXANY))) { if ( iflag & IXON ) { if ( iflag & IXANY ) { // Enable XON/XANY output flow control i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XANY)); } else { // Enable XON output flow control i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_XON)); } } else { // Disable XON output flow control no_xon: i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_IXON_OPT(CIX_NONE)); } } if ( (iflag & ISTRIP) ^ ( o_tios->c_iflag & (ISTRIP)) ) { i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_ISTRIP_OPT((iflag & ISTRIP ? 1 : 0))); } if ( (iflag & INPCK) ^ ( o_tios->c_iflag & (INPCK)) ) { i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_PARCHK((iflag & INPCK) ? CPK_ENAB : CPK_DSAB)); } if ( (iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) ^ ( o_tios->c_iflag & (IGNBRK|PARMRK|BRKINT|IGNPAR)) ) { char brkrpt = 0; char parrpt = 0; if ( iflag & IGNBRK ) { /* Ignore breaks altogether */ /* Ignore breaks altogether */ i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_NREP); } else { if ( iflag & BRKINT ) { if ( iflag & PARMRK ) { brkrpt = 0x0a; // exception an inline triple } else { brkrpt = 0x1a; // exception and NULL } brkrpt |= 0x04; // flush input } else { if ( iflag & PARMRK ) { brkrpt = 0x0b; //POSIX triple \0377 \0 \0 } else { brkrpt = 0x01; // Null only } } i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_BRK_REP(brkrpt)); } if (iflag & IGNPAR) { parrpt = 0x20; /* would be 2 for not cirrus bug */ /* would be 0x20 cept for cirrus bug */ } else { if ( iflag & PARMRK ) { /* * Replace error characters with 3-byte sequence (\0377,\0,char) */ parrpt = 0x04 ; i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_ISTRIP_OPT((char)0)); } else { parrpt = 0x03; } } i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_SET_ERROR(parrpt)); } if (cflag & CLOCAL) { // Status reporting fails for DCD if this is off i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_NREP); pCh->flags &= ~ASYNC_CHECK_CD; } else { i2QueueCommands(PTYPE_INLINE, pCh, 100, 1, CMD_DCD_REP); pCh->flags |= ASYNC_CHECK_CD; } #ifdef XXX do_flags_thing: // This is a test, we don't do the flags thing if ( (cflag & CRTSCTS) ) { cflag |= 014000000000; } i2QueueCommands(PTYPE_BYPASS, pCh, 100, 1, CMD_UNIX_FLAGS(iflag,cflag,lflag)); #endif service_it: i2DrainOutput( pCh, 100 ); } /******************************************************************************/ /* IPL Device Section */ /******************************************************************************/ /******************************************************************************/ /* Function: ip2_ipl_read() */ /* Parameters: Pointer to device inode */ /* Pointer to file structure */ /* Pointer to data */ /* Number of bytes to read */ /* Returns: Success or failure */ /* */ /* Description: Ugly */ /* */ /* */ /******************************************************************************/ static #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0) int ip2_ipl_read(struct inode *pInode, char *pData, size_t count, loff_t *off ) unsigned int minor = MINOR( pInode->i_rdev ); #else ssize_t ip2_ipl_read(struct file *pFile, char *pData, size_t count, loff_t *off ) { unsigned int minor = MINOR( pFile->f_dentry->d_inode->i_rdev ); #endif int rc = 0; #ifdef IP2DEBUG_IPL printk (KERN_DEBUG "IP2IPL: read %p, %d bytes\n", pData, count ); #endif switch( minor ) { case 0: // IPL device rc = -EINVAL; break; case 1: // Status dump rc = -EINVAL; break; case 2: // Ping device rc = -EINVAL; break; case 3: // Trace device rc = DumpTraceBuffer ( pData, count ); break; case 4: // Trace device rc = DumpFifoBuffer ( pData, count ); break; default: rc = -ENODEV; break; } return rc; } static int DumpFifoBuffer ( char *pData, int count ) { #ifdef DEBUG_FIFO int rc; COPY_TO_USER(rc, pData, DBGBuf, count); printk(KERN_DEBUG "Last index %d\n", I ); return count; #endif /* DEBUG_FIFO */ return 0; } static int DumpTraceBuffer ( char *pData, int count ) { #ifdef IP2DEBUG_TRACE int rc; int dumpcount; int chunk; int *pIndex = (int*)pData; if ( count < (sizeof(int) * 6) ) { return -EIO; } PUT_USER(rc, tracewrap, pIndex ); PUT_USER(rc, TRACEMAX, ++pIndex ); PUT_USER(rc, tracestrip, ++pIndex ); PUT_USER(rc, tracestuff, ++pIndex ); pData += sizeof(int) * 6; count -= sizeof(int) * 6; dumpcount = tracestuff - tracestrip; if ( dumpcount < 0 ) { dumpcount += TRACEMAX; } if ( dumpcount > count ) { dumpcount = count; } chunk = TRACEMAX - tracestrip; if ( dumpcount > chunk ) { COPY_TO_USER(rc, pData, &tracebuf[tracestrip], chunk * sizeof(tracebuf[0]) ); pData += chunk * sizeof(tracebuf[0]); tracestrip = 0; chunk = dumpcount - chunk; } else { chunk = dumpcount; } COPY_TO_USER(rc, pData, &tracebuf[tracestrip], chunk * sizeof(tracebuf[0]) ); tracestrip += chunk; tracewrap = 0; PUT_USER(rc, tracestrip, ++pIndex ); PUT_USER(rc, tracestuff, ++pIndex ); return dumpcount; #else return 0; #endif } /******************************************************************************/ /* Function: ip2_ipl_write() */ /* Parameters: */ /* Pointer to file structure */ /* Pointer to data */ /* Number of bytes to write */ /* Returns: Success or failure */ /* */ /* Description: */ /* */ /* */ /******************************************************************************/ static ssize_t ip2_ipl_write(struct file *pFile, const char *pData, size_t count, loff_t *off) { #ifdef IP2DEBUG_IPL printk (KERN_DEBUG "IP2IPL: write %p, %d bytes\n", pData, count ); #endif return 0; } /******************************************************************************/ /* Function: ip2_ipl_ioctl() */ /* Parameters: Pointer to device inode */ /* Pointer to file structure */ /* Command */ /* Argument */ /* Returns: Success or failure */ /* */ /* Description: */ /* */ /* */ /******************************************************************************/ static int ip2_ipl_ioctl ( struct inode *pInode, struct file *pFile, UINT cmd, ULONG arg ) { unsigned int iplminor = MINOR(pInode->i_rdev); int rc = 0; ULONG *pIndex = (ULONG*)arg; i2eBordStrPtr pB = i2BoardPtrTable[iplminor / 4]; i2ChanStrPtr pCh; #ifdef IP2DEBUG_IPL printk (KERN_DEBUG "IP2IPL: ioctl cmd %d, arg %ld\n", cmd, arg ); #endif switch ( iplminor ) { case 0: // IPL device rc = -EINVAL; break; case 1: // Status dump case 5: case 9: case 13: switch ( cmd ) { case 64: /* Driver - ip2stat */ PUT_USER(rc, ref_count, pIndex++ ); PUT_USER(rc, irq_counter, pIndex++ ); PUT_USER(rc, bh_counter, pIndex++ ); break; case 65: /* Board - ip2stat */ if ( pB ) { COPY_TO_USER(rc, (char*)arg, (char*)pB, sizeof(i2eBordStr) ); PUT_USER(rc, INB(pB->i2eStatus), (ULONG*)(arg + (ULONG)(&pB->i2eStatus) - (ULONG)pB ) ); } else { rc = -ENODEV; } break; default: pCh = DevTable[cmd]; if ( pCh ) { COPY_TO_USER(rc, (char*)arg, (char*)pCh, sizeof(i2ChanStr) ); } else { rc = cmd < 64 ? -ENODEV : -EINVAL; } } break; case 2: // Ping device rc = -EINVAL; break; case 3: // Trace device if ( cmd == 1 ) { PUT_USER(rc, iiSendPendingMail, pIndex++ ); PUT_USER(rc, i2InitChannels, pIndex++ ); PUT_USER(rc, i2QueueNeeds, pIndex++ ); PUT_USER(rc, i2QueueCommands, pIndex++ ); PUT_USER(rc, i2GetStatus, pIndex++ ); PUT_USER(rc, i2Input, pIndex++ ); PUT_USER(rc, i2InputFlush, pIndex++ ); PUT_USER(rc, i2Output, pIndex++ ); PUT_USER(rc, i2FlushOutput, pIndex++ ); PUT_USER(rc, i2DrainWakeup, pIndex++ ); PUT_USER(rc, i2DrainOutput, pIndex++ ); PUT_USER(rc, i2OutputFree, pIndex++ ); PUT_USER(rc, i2StripFifo, pIndex++ ); PUT_USER(rc, i2StuffFifoBypass, pIndex++ ); PUT_USER(rc, i2StuffFifoFlow, pIndex++ ); PUT_USER(rc, i2StuffFifoInline, pIndex++ ); PUT_USER(rc, i2ServiceBoard, pIndex++ ); PUT_USER(rc, serviceOutgoingFifo, pIndex++ ); // PUT_USER(rc, ip2_init, pIndex++ ); PUT_USER(rc, ip2_init_board, pIndex++ ); PUT_USER(rc, find_eisa_board, pIndex++ ); PUT_USER(rc, set_irq, pIndex++ ); PUT_USER(rc, ip2_interrupt, pIndex++ ); PUT_USER(rc, ip2_poll, pIndex++ ); PUT_USER(rc, service_all_boards, pIndex++ ); PUT_USER(rc, do_input, pIndex++ ); PUT_USER(rc, do_status, pIndex++ ); #ifndef IP2DEBUG_OPEN PUT_USER(rc, 0, pIndex++ ); #else PUT_USER(rc, open_sanity_check, pIndex++ ); #endif PUT_USER(rc, ip2_open, pIndex++ ); PUT_USER(rc, ip2_close, pIndex++ ); PUT_USER(rc, ip2_hangup, pIndex++ ); PUT_USER(rc, ip2_write, pIndex++ ); PUT_USER(rc, ip2_putchar, pIndex++ ); PUT_USER(rc, ip2_flush_chars, pIndex++ ); PUT_USER(rc, ip2_write_room, pIndex++ ); PUT_USER(rc, ip2_chars_in_buf, pIndex++ ); PUT_USER(rc, ip2_flush_buffer, pIndex++ ); //PUT_USER(rc, ip2_wait_until_sent, pIndex++ ); PUT_USER(rc, 0, pIndex++ ); PUT_USER(rc, ip2_throttle, pIndex++ ); PUT_USER(rc, ip2_unthrottle, pIndex++ ); PUT_USER(rc, ip2_ioctl, pIndex++ ); PUT_USER(rc, set_modem_info, pIndex++ ); PUT_USER(rc, get_serial_info, pIndex++ ); PUT_USER(rc, set_serial_info, pIndex++ ); PUT_USER(rc, ip2_set_termios, pIndex++ ); PUT_USER(rc, ip2_set_line_discipline, pIndex++ ); PUT_USER(rc, set_params, pIndex++ ); } else { rc = -EINVAL; } break; default: rc = -ENODEV; break; } return rc; } /******************************************************************************/ /* Function: ip2_ipl_open() */ /* Parameters: Pointer to device inode */ /* Pointer to file structure */ /* Returns: Success or failure */ /* */ /* Description: */ /* */ /* */ /******************************************************************************/ static int ip2_ipl_open( struct inode *pInode, struct file *pFile ) { unsigned int iplminor = MINOR(pInode->i_rdev); i2eBordStrPtr pB; i2ChanStrPtr pCh; #ifdef IP2DEBUG_IPL printk (KERN_DEBUG "IP2IPL: open\n" ); #endif switch(iplminor) { // These are the IPL devices case 0: case 4: case 8: case 12: break; // These are the status devices case 1: case 5: case 9: case 13: break; // These are the debug devices case 2: case 6: case 10: case 14: pB = i2BoardPtrTable[iplminor / 4]; pCh = (i2ChanStrPtr) pB->i2eChannelPtr; break; // This is the trace device case 3: break; } return 0; } /******************************************************************************/ /* Function: ip2_read_procmem */ /* Parameters: */ /* */ /* Returns: Length of output */ /* */ /* Description: */ /* Supplies some driver operating parameters */ /* Not real useful unless your debugging the fifo */ /* */ /******************************************************************************/ #define LIMIT (PAGE_SIZE - 120) static int ip2_read_procmem(char *buf, char **start, off_t offset, int len) { i2eBordStrPtr pB; i2ChanStrPtr pCh; PTTY tty; int i; len = 0; #define FMTLINE "%3d: 0x%08x 0x%08x 0%011o 0%011o\n" #define FMTLIN2 " 0x%04x 0x%04x tx flow 0x%x\n" #define FMTLIN3 " 0x%04x 0x%04x rc flow\n" len += sprintf(buf+len,"\n"); for( i = 0; i < IP2_MAX_BOARDS; ++i ) { pB = i2BoardPtrTable[i]; if ( pB ) { len += sprintf(buf+len,"board %d:\n",i); len += sprintf(buf+len,"\tFifo rem: %d mty: %x outM %x\n", pB->i2eFifoRemains,pB->i2eWaitingForEmptyFifo,pB->i2eOutMailWaiting); } } len += sprintf(buf+len,"#: tty flags, port flags, cflags, iflags\n"); for (i=0; i < IP2_MAX_PORTS; i++) { if (len > LIMIT) break; pCh = DevTable[i]; if (pCh) { tty = pCh->pTTY; if (tty && tty->count) { len += sprintf(buf+len,FMTLINE,i,(int)tty->flags,pCh->flags, tty->termios->c_cflag,tty->termios->c_iflag); len += sprintf(buf+len,FMTLIN2, pCh->outfl.asof,pCh->outfl.room,pCh->channelNeeds); len += sprintf(buf+len,FMTLIN3,pCh->infl.asof,pCh->infl.room); } } } return len; } /* * This is the handler for /proc/tty/driver/ip2 * * This stretch of code has been largely plagerized from at least three * different sources including ip2mkdev.c and a couple of other drivers. * The bugs are all mine. :-) =mhw= */ int ip2_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data) { int i, j, box; int len = 0; int boxes = 0; int ports = 0; int tports = 0; off_t begin = 0; i2eBordStrPtr pB; len += sprintf(page, "ip2info: 1.0 driver: %s\n", pcVersion ); len += sprintf(page+len, "Driver: SMajor=%d CMajor=%d IMajor=%d MaxBoards=%d MaxBoxes=%d MaxPorts=%d\n", IP2_TTY_MAJOR, IP2_CALLOUT_MAJOR, IP2_IPL_MAJOR, IP2_MAX_BOARDS, ABS_MAX_BOXES, ABS_BIGGEST_BOX); for( i = 0; i < IP2_MAX_BOARDS; ++i ) { /* This need to be reset for a board by board count... */ boxes = 0; pB = i2BoardPtrTable[i]; if( pB ) { switch( pB->i2ePom.e.porID & ~POR_ID_RESERVED ) { case POR_ID_FIIEX: len += sprintf( page+len, "Board %d: EX ports=", i ); for( box = 0; box < ABS_MAX_BOXES; ++box ) { ports = 0; if( pB->i2eChannelMap[box] != 0 ) ++boxes; for( j = 0; j < ABS_BIGGEST_BOX; ++j ) { if( pB->i2eChannelMap[box] & 1<< j ) { ++ports; } } len += sprintf( page+len, "%d,", ports ); tports += ports; } --len; /* Backup over that last comma */ len += sprintf( page+len, " boxes=%d width=%d", boxes, pB->i2eDataWidth16 ? 16 : 8 ); break; case POR_ID_II_4: len += sprintf(page+len, "Board %d: ISA-4 ports=4 boxes=1", i ); tports = ports = 4; break; case POR_ID_II_8: len += sprintf(page+len, "Board %d: ISA-8-std ports=8 boxes=1", i ); tports = ports = 8; break; case POR_ID_II_8R: len += sprintf(page+len, "Board %d: ISA-8-RJ11 ports=8 boxes=1", i ); tports = ports = 8; break; default: len += sprintf(page+len, "Board %d: unknown", i ); /* Don't try and probe for minor numbers */ tports = ports = 0; } } else { /* Don't try and probe for minor numbers */ len += sprintf(page+len, "Board %d: vacant", i ); tports = ports = 0; } if( tports ) { len += sprintf(page+len, " minors=" ); for ( box = 0; box < ABS_MAX_BOXES; ++box ) { for ( j = 0; j < ABS_BIGGEST_BOX; ++j ) { if ( pB->i2eChannelMap[box] & (1 << j) ) { len += sprintf (page+len,"%d,", j + ABS_BIGGEST_BOX * (box+i*ABS_MAX_BOXES)); } } } page[ len - 1 ] = '\n'; /* Overwrite that last comma */ } else { len += sprintf (page+len,"\n" ); } if (len+begin > off+count) break; if (len+begin < off) { begin += len; len = 0; } } if (i >= IP2_MAX_BOARDS) *eof = 1; if (off >= len+begin) return 0; *start = page + (off-begin); return ((count < begin+len-off) ? count : begin+len-off); } /******************************************************************************/ /* Function: ip2trace() */ /* Parameters: Value to add to trace buffer */ /* Returns: Nothing */ /* */ /* Description: */ /* */ /* */ /******************************************************************************/ void ip2trace (unsigned short pn, unsigned char cat, unsigned char label, unsigned long codes, ...) { #ifdef IP2DEBUG_TRACE long flags; unsigned long *pCode = &codes; union ip2breadcrumb bc; i2ChanStrPtr pCh; tracebuf[tracestuff++] = jiffies; if ( tracestuff == TRACEMAX ) { tracestuff = 0; } if ( tracestuff == tracestrip ) { if ( ++tracestrip == TRACEMAX ) { tracestrip = 0; } ++tracewrap; } bc.hdr.port = 0xff & pn; bc.hdr.cat = cat; bc.hdr.codes = (unsigned char)( codes & 0xff ); bc.hdr.label = label; tracebuf[tracestuff++] = bc.value; for (;;) { if ( tracestuff == TRACEMAX ) { tracestuff = 0; } if ( tracestuff == tracestrip ) { if ( ++tracestrip == TRACEMAX ) { tracestrip = 0; } ++tracewrap; } if ( !codes-- ) break; tracebuf[tracestuff++] = *++pCode; } #endif } MODULE_LICENSE("GPL"); |