static char rcsid[] = "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $"; /* * linux/kernel/cyclades.c * * Maintained by Marcio Saito (cyclades@netcom.com) and * Randolph Bentson (bentson@grieg.seaslug.org) * * Much of the design and some of the code came from serial.c * which was copyright (C) 1991, 1992 Linus Torvalds. It was * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, * and then fixed as suggested by Michael K. Johnson 12/12/92. * * This version does not support shared irq's. * * This module exports the following rs232 io functions: * long cy_init(long); * int cy_open(struct tty_struct *tty, struct file *filp); * * $Log: cyclades.c,v $ * Revision 1.36.1.4 1995/03/29 06:14:14 bentson * disambiguate between Cyclom-16Y and Cyclom-32Ye; * * Revision 1.36.1.3 1995/03/23 22:15:35 bentson * add missing break in modem control block in ioctl switch statement * (discovered by Michael Edward Chastain ); * * Revision 1.36.1.2 1995/03/22 19:16:22 bentson * make sure CTS flow control is set as soon as possible (thanks * to note from David Lambert ); * * Revision 1.36.1.1 1995/03/13 15:44:43 bentson * initialize defaults for receive threshold and stale data timeout; * cosmetic changes; * * Revision 1.36 1995/03/10 23:33:53 bentson * added support of chips 4-7 in 32 port Cyclom-Ye; * fix cy_interrupt pointer dereference problem * (Joe Portman ); * give better error response if open is attempted on non-existent port * (Zachariah Vaum ); * correct command timeout (Kenneth Lerman ); * conditional compilation for -16Y on systems with fast, noisy bus; * comment out diagnostic print function; * cleaned up table of base addresses; * set receiver time-out period register to correct value, * set receive threshold to better default values, * set chip timer to more accurate 200 Hz ticking, * add code to monitor and modify receive parameters * (Rik Faith Nick Simicich * ); * * Revision 1.35 1994/12/16 13:54:18 steffen * additional patch by Marcio Saito for board detection * Accidently left out in 1.34 * * Revision 1.34 1994/12/10 12:37:12 steffen * This is the corrected version as suggested by Marcio Saito * * Revision 1.33 1994/12/01 22:41:18 bentson * add hooks to support more high speeds directly; add tytso * patch regarding CLOCAL wakeups * * Revision 1.32 1994/11/23 19:50:04 bentson * allow direct kernel control of higher signalling rates; * look for cards at additional locations * * Revision 1.31 1994/11/16 04:33:28 bentson * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com-- * a problem in chars_in_buffer has been resolved by some * small changes; this should yield smoother output * * Revision 1.30 1994/11/16 04:28:05 bentson * Fix from Corey Minyard, Internet: minyard@metronet.com, * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to * cy_hangup that appears to clear up much (all?) of the * DTR glitches; also he's added/cleaned-up diagnostic messages * * Revision 1.29 1994/11/16 04:16:07 bentson * add change proposed by Ralph Sims, ralphs@halcyon.com, to * operate higher speeds in same way as other serial ports; * add more serial ports (for up to two 16-port muxes). * * Revision 1.28 1994/11/04 00:13:16 root * turn off diagnostic messages * * Revision 1.27 1994/11/03 23:46:37 root * bunch of changes to bring driver into greater conformance * with the serial.c driver (looking for missed fixes) * * Revision 1.26 1994/11/03 22:40:36 root * automatic interrupt probing fixed. * * Revision 1.25 1994/11/03 20:17:02 root * start to implement auto-irq * * Revision 1.24 1994/11/03 18:01:55 root * still working on modem signals--trying not to drop DTR * during the getty/login processes * * Revision 1.23 1994/11/03 17:51:36 root * extend baud rate support; set receive threshold as function * of baud rate; fix some problems with RTS/CTS; * * Revision 1.22 1994/11/02 18:05:35 root * changed arguments to udelay to type long to get * delays to be of correct duration * * Revision 1.21 1994/11/02 17:37:30 root * employ udelay (after calibrating loops_per_second earlier * in init/main.c) instead of using home-grown delay routines * * Revision 1.20 1994/11/02 03:11:38 root * cy_chars_in_buffer forces a return value of 0 to let * login work (don't know why it does); some functions * that were returning EFAULT, now executes the code; * more work on deciding when to disable xmit interrupts; * * Revision 1.19 1994/11/01 20:10:14 root * define routine to start transmission interrupts (by enabling * transmit interrupts); directly enable/disable modem interrupts; * * Revision 1.18 1994/11/01 18:40:45 bentson * Don't always enable transmit interrupts in startup; interrupt on * TxMpty instead of TxRdy to help characters get out before shutdown; * restructure xmit interrupt to check for chars first and quit if * none are ready to go; modem status (MXVRx) is upright, _not_ inverted * (to my view); * * Revision 1.17 1994/10/30 04:39:45 bentson * rename serial_driver and callout_driver to cy_serial_driver and * cy_callout_driver to avoid linkage interference; initialize * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port * from cyclades_port structure; add paranoia check to cy_close; * * Revision 1.16 1994/10/30 01:14:33 bentson * change major numbers; add some _early_ return statements; * * Revision 1.15 1994/10/29 06:43:15 bentson * final tidying up for clean compile; enable some error reporting * * Revision 1.14 1994/10/28 20:30:22 Bentson * lots of changes to drag the driver towards the new tty_io * structures and operation. not expected to work, but may * compile cleanly. * * Revision 1.13 1994/07/21 23:08:57 Bentson * add some diagnostic cruft; support 24 lines (for testing * both -8Y and -16Y cards; be more thorough in servicing all * chips during interrupt; add "volatile" a few places to * circumvent compiler optimizations; fix base & offset * computations in block_til_ready (was causing chip 0 to * stop operation) * * Revision 1.12 1994/07/19 16:42:11 Bentson * add some hackery for kernel version 1.1.8; expand * error messages; refine timing for delay loops and * declare loop params volatile * * Revision 1.11 1994/06/11 21:53:10 bentson * get use of save_car right in transmit interrupt service * * Revision 1.10.1.1 1994/06/11 21:31:18 bentson * add some diagnostic printing; try to fix save_car stuff * * Revision 1.10 1994/06/11 20:36:08 bentson * clean up compiler warnings * * Revision 1.9 1994/06/11 19:42:46 bentson * added a bunch of code to support modem signalling * * Revision 1.8 1994/06/11 17:57:07 bentson * recognize break & parity error * * Revision 1.7 1994/06/05 05:51:34 bentson * Reorder baud table to be monotonic; add cli to CP; discard * incoming characters and status if the line isn't open; start to * fold code into cy_throttle; start to port get_serial_info, * set_serial_info, get_modem_info, set_modem_info, and send_break * from serial.c; expand cy_ioctl; relocate and expand config_setup; * get flow control characters from tty struct; invalidate ports w/o * hardware; * * Revision 1.6 1994/05/31 18:42:21 bentson * add a loop-breaker in the interrupt service routine; * note when port is initialized so that it can be shut * down under the right conditions; receive works without * any obvious errors * * Revision 1.5 1994/05/30 00:55:02 bentson * transmit works without obvious errors * * Revision 1.4 1994/05/27 18:46:27 bentson * incorporated more code from lib_y.c; can now print short * strings under interrupt control to port zero; seems to * select ports/channels/lines correctly * * Revision 1.3 1994/05/25 22:12:44 bentson * shifting from multi-port on a card to proper multiplexor * data structures; added skeletons of most routines * * Revision 1.2 1994/05/19 13:21:43 bentson * start to crib from other sources * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define small_delay(x) for(j=0;jflags. * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, * HI VHI */ static int baud_table[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000, 0}; static char baud_co[] = { /* 25 MHz clock option table */ /* value => 00 01 02 03 04 */ /* divide by 8 32 128 512 2048 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; static char baud_bpr[] = { /* 25 MHz baud rate period table */ 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15}; static char baud_cor3[] = { /* receive threshold */ 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07}; static void shutdown(struct cyclades_port *); static int startup (struct cyclades_port *); static void cy_throttle(struct tty_struct *); static void cy_unthrottle(struct tty_struct *); static void config_setup(struct cyclades_port *); extern void console_print(const char *); #ifdef CYCLOM_SHOW_STATUS static void show_status(int); #endif static inline int serial_paranoia_check(struct cyclades_port *info, dev_t device, const char *routine) { #ifdef SERIAL_PARANOIA_CHECK static const char *badmagic = "Warning: bad magic number for serial struct (%d, %d) in %s\n"; static const char *badinfo = "Warning: null cyclades_port for (%d, %d) in %s\n"; static const char *badrange = "Warning: cyclades_port out of range for (%d, %d) in %s\n"; if (!info) { printk(badinfo, MAJOR(device), MINOR(device), routine); return 1; } if( (long)info < (long)(&cy_port[0]) || (long)(&cy_port[NR_PORTS]) < (long)info ){ printk(badrange, MAJOR(device), MINOR(device), routine); return 1; } if (info->magic != CYCLADES_MAGIC) { printk(badmagic, MAJOR(device), MINOR(device), routine); return 1; } #endif return 0; } /* serial_paranoia_check */ /* The following diagnostic routines allow the driver to spew information on the screen, even (especially!) during interrupts. */ void SP(char *data){ unsigned long flags; save_flags(flags); cli(); console_print(data); restore_flags(flags); } char scrn[2]; void CP(char data){ unsigned long flags; save_flags(flags); cli(); scrn[0] = data; console_print(scrn); restore_flags(flags); }/* CP */ void CP1(int data) { (data<10)? CP(data+'0'): CP(data+'A'-10); }/* CP1 */ void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */ void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */ void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */ /* This routine waits up to 1000 micro-seconds for the previous command to the Cirrus chip to complete and then issues the new command. An error is returned if the previous command didn't finish within the time limit. */ u_short write_cy_cmd(u_char *base_addr, u_char cmd) { unsigned long flags; volatile int i; save_flags(flags); cli(); /* Check to see that the previous command has completed */ for(i = 0 ; i < 100 ; i++){ if (base_addr[CyCCR] == 0){ break; } udelay(10L); } /* if the CCR never cleared, the previous command didn't finish within the "reasonable time" */ if ( i == 10 ) { restore_flags(flags); return (-1); } /* Issue the new command */ base_addr[CyCCR] = cmd; restore_flags(flags); return(0); } /* write_cy_cmd */ /* cy_start and cy_stop provide software output flow control as a function of XON/XOFF, software CTS, and other such stuff. */ static void cy_stop(struct tty_struct *tty) { struct cyclades_card *cinfo; struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned char *base_addr; int chip,channel; unsigned long flags; #ifdef SERIAL_DEBUG_OTHER printk("cy_stop ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_stop")) return; cinfo = &cy_card[info->card]; channel = info->line - cinfo->first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[info->card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)(channel & 0x0003); /* index channel */ base_addr[CySRER] &= ~CyTxMpty; restore_flags(flags); return; } /* cy_stop */ static void cy_start(struct tty_struct *tty) { struct cyclades_card *cinfo; struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned char *base_addr; int chip,channel; unsigned long flags; #ifdef SERIAL_DEBUG_OTHER printk("cy_start ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_start")) return; cinfo = &cy_card[info->card]; channel = info->line - cinfo->first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[info->card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)(channel & 0x0003); base_addr[CySRER] |= CyTxMpty; restore_flags(flags); return; } /* cy_start */ /* * This routine is used by the interrupt handler to schedule * processing in the software interrupt portion of the driver * (also known as the "bottom half"). This can be called any * number of times for any channel without harm. */ static inline void cy_sched_event(struct cyclades_port *info, int event) { info->event |= 1 << event; /* remember what kind of event and who */ queue_task_irq_off(&info->tqueue, &tq_cyclades); /* it belongs to */ mark_bh(CYCLADES_BH); /* then trigger event */ } /* cy_sched_event */ /* * This interrupt routine is used * while we are probing for submarines. */ static void cy_probe(int irq, struct pt_regs *regs) { cy_irq_triggered = irq; cy_triggered |= 1 << irq; return; } /* cy_probe */ /* The real interrupt service routine is called whenever the card wants its hand held--chars received, out buffer empty, modem change, etc. */ static void cy_interrupt(int irq, struct pt_regs *regs) { struct tty_struct *tty; int status; struct cyclades_card *cinfo; struct cyclades_port *info; volatile unsigned char *base_addr, *card_base_addr; int chip; int save_xir, channel, save_car; char data; volatile char vdata; int char_count; int outch; int i,j; int too_many; int had_work; int mdm_change; int mdm_status; if((cinfo = IRQ_cards[irq]) == 0){ return; /* spurious interrupt */ } /* This loop checks all chips in the card. Make a note whenever _any_ chip had some work to do, as this is considered an indication that there will be more to do. Only when no chip has any work does this outermost loop exit. */ do{ had_work = 0; for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) { base_addr = (unsigned char *) (cinfo->base_addr + cy_chip_offset[chip]); too_many = 0; while ( (status = base_addr[CySVRR]) != 0x00) { had_work++; /* The purpose of the following test is to ensure that no chip can monopolize the driver. This forces the chips to be checked in a round-robin fashion (after draining each of a bunch (1000) of characters). */ if(1000first_line; info = &cy_port[i]; info->last_active = jiffies; save_car = base_addr[CyCAR]; base_addr[CyCAR] = save_xir; /* if there is nowhere to put the data, discard it */ if(info->tty == 0){ j = (base_addr[CyRIVR] & CyIVRMask); if ( j == CyIVRRxEx ) { /* exception */ data = base_addr[CyRDSR]; } else { /* normal character reception */ char_count = base_addr[CyRDCR]; while(char_count--){ data = base_addr[CyRDSR]; } } }else{ /* there is an open port for this data */ tty = info->tty; j = (base_addr[CyRIVR] & CyIVRMask); if ( j == CyIVRRxEx ) { /* exception */ data = base_addr[CyRDSR]; if(data & info->ignore_status_mask){ continue; } if (tty->flip.count < TTY_FLIPBUF_SIZE){ tty->flip.count++; if (data & info->read_status_mask){ if(data & CyBREAK){ *tty->flip.flag_buf_ptr++ = TTY_BREAK; *tty->flip.char_buf_ptr++ = base_addr[CyRDSR]; if (info->flags & ASYNC_SAK){ do_SAK(tty); } }else if(data & CyFRAME){ *tty->flip.flag_buf_ptr++ = TTY_FRAME; *tty->flip.char_buf_ptr++ = base_addr[CyRDSR]; }else if(data & CyPARITY){ *tty->flip.flag_buf_ptr++ = TTY_PARITY; *tty->flip.char_buf_ptr++ = base_addr[CyRDSR]; }else if(data & CyOVERRUN){ *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; *tty->flip.char_buf_ptr++ = 0; /* If the flip buffer itself is overflowing, we still loose the next incoming character. */ if(tty->flip.count < TTY_FLIPBUF_SIZE){ tty->flip.count++; *tty->flip.flag_buf_ptr++ = TTY_NORMAL; *tty->flip.char_buf_ptr++ = base_addr[CyRDSR]; } /* These two conditions may imply */ /* a normal read should be done. */ /* }else if(data & CyTIMEOUT){ */ /* }else if(data & CySPECHAR){ */ }else{ *tty->flip.flag_buf_ptr++ = 0; *tty->flip.char_buf_ptr++ = 0; } }else{ *tty->flip.flag_buf_ptr++ = 0; *tty->flip.char_buf_ptr++ = 0; } }else{ /* there was a software buffer overrun and nothing could be done about it!!! */ } } else { /* normal character reception */ /* load # characters available from the chip */ char_count = base_addr[CyRDCR]; #ifdef CYCLOM_ENABLE_MONITORING ++info->mon.int_count; info->mon.char_count += char_count; if (char_count > info->mon.char_max) info->mon.char_max = char_count; info->mon.char_last = char_count; #endif while(char_count--){ if (tty->flip.count >= TTY_FLIPBUF_SIZE){ break; } tty->flip.count++; data = base_addr[CyRDSR]; *tty->flip.flag_buf_ptr++ = TTY_NORMAL; *tty->flip.char_buf_ptr++ = data; #ifdef CYCLOM_16Y_HACK udelay(10L); #endif } } queue_task_irq_off(&tty->flip.tqueue, &tq_timer); } /* end of service */ base_addr[CyRIR] = (save_xir & 0x3f); base_addr[CyCAR] = (save_car); } if (status & CySRTransmit) { /* transmission interrupt */ /* Since we only get here when the transmit buffer is empty, we know we can always stuff a dozen characters. */ /* determine the channel and change to that context */ save_xir = (u_char) base_addr[CyTIR]; channel = (u_short ) (save_xir & CyIRChannel); i = channel + chip * 4 + cinfo->first_line; save_car = base_addr[CyCAR]; base_addr[CyCAR] = save_xir; /* validate the port number (as configured and open) */ if( (i < 0) || (NR_PORTS <= i) ){ base_addr[CySRER] &= ~CyTxMpty; goto txend; } info = &cy_port[i]; info->last_active = jiffies; if(info->tty == 0){ base_addr[CySRER] &= ~CyTxMpty; goto txdone; } /* load the on-chip space available for outbound data */ char_count = info->xmit_fifo_size; if(info->x_char) { /* send special char */ outch = info->x_char; base_addr[CyTDR] = outch; char_count--; info->x_char = 0; } if (info->x_break){ /* The Cirrus chip requires the "Embedded Transmit Commands" of start break, delay, and end break sequences to be sent. The duration of the break is given in TICs, which runs at HZ (typically 100) and the PPR runs at 200 Hz, so the delay is duration * 200/HZ, and thus a break can run from 1/100 sec to about 5/4 sec. */ base_addr[CyTDR] = 0; /* start break */ base_addr[CyTDR] = 0x81; base_addr[CyTDR] = 0; /* delay a bit */ base_addr[CyTDR] = 0x82; base_addr[CyTDR] = info->x_break*200/HZ; base_addr[CyTDR] = 0; /* terminate break */ base_addr[CyTDR] = 0x83; char_count -= 7; info->x_break = 0; } while (char_count-- > 0){ if (!info->xmit_cnt){ base_addr[CySRER] &= ~CyTxMpty; goto txdone; } if (info->xmit_buf == 0){ base_addr[CySRER] &= ~CyTxMpty; goto txdone; } if (info->tty->stopped || info->tty->hw_stopped){ base_addr[CySRER] &= ~CyTxMpty; goto txdone; } /* Because the Embedded Transmit Commands have been enabled, we must check to see if the escape character, NULL, is being sent. If it is, we must ensure that there is room for it to be doubled in the output stream. Therefore we no longer advance the pointer when the character is fetched, but rather wait until after the check for a NULL output character. (This is necessary because there may not be room for the two chars needed to send a NULL. */ outch = info->xmit_buf[info->xmit_tail]; if( outch ){ info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (PAGE_SIZE - 1); base_addr[CyTDR] = outch; }else{ if(char_count > 1){ info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (PAGE_SIZE - 1); base_addr[CyTDR] = outch; base_addr[CyTDR] = 0; char_count--; }else{ } } } txdone: if (info->xmit_cnt < WAKEUP_CHARS) { cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } txend: /* end of service */ base_addr[CyTIR] = (save_xir & 0x3f); base_addr[CyCAR] = (save_car); } if (status & CySRModem) { /* modem interrupt */ /* determine the channel and change to that context */ save_xir = (u_char) base_addr[CyMIR]; channel = (u_short ) (save_xir & CyIRChannel); info = &cy_port[channel + chip * 4 + cinfo->first_line]; info->last_active = jiffies; save_car = base_addr[CyCAR]; base_addr[CyCAR] = save_xir; mdm_change = base_addr[CyMISR]; mdm_status = base_addr[CyMSVR1]; if(info->tty == 0){ /* nowhere to put the data, ignore it */ ; }else{ if((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)){ if(mdm_status & CyDCD){ /* CP('!'); */ cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); }else if(!((info->flags & ASYNC_CALLOUT_ACTIVE) &&(info->flags & ASYNC_CALLOUT_NOHUP))){ /* CP('@'); */ cy_sched_event(info, Cy_EVENT_HANGUP); } } if((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)){ if(info->tty->stopped){ if(mdm_status & CyCTS){ /* !!! cy_start isn't used because... */ info->tty->stopped = 0; base_addr[CySRER] |= CyTxMpty; cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } }else{ if(!(mdm_status & CyCTS)){ /* !!! cy_stop isn't used because... */ info->tty->stopped = 1; base_addr[CySRER] &= ~CyTxMpty; } } } if(mdm_status & CyDSR){ } if(mdm_status & CyRI){ } } /* end of service */ base_addr[CyMIR] = (save_xir & 0x3f); base_addr[CyCAR] = save_car; } } /* end while status != 0 */ } /* end loop for chips... */ } while(had_work); /* clear interrupts */ card_base_addr = (unsigned char *)cinfo->base_addr; vdata = *(card_base_addr + Cy_ClrIntr); /* Cy_ClrIntr is 0x1800 */ } /* cy_interrupt */ /* * This routine is used to handle the "bottom half" processing for the * serial driver, known also the "software interrupt" processing. * This processing is done at the kernel interrupt level, after the * cy_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This * is where time-consuming activities which can not be done in the * interrupt driver proper are done; the interrupt driver schedules * them using cy_sched_event(), and they get done here. * * This is done through one level of indirection--the task queue. * When a hardware interrupt service routine wants service by the * driver's bottom half, it enqueues the appropriate tq_struct (one * per port) to the tq_cyclades work queue and sets a request flag * via mark_bh for processing that queue. When the time is right, * do_cyclades_bh is called (because of the mark_bh) and it requests * that the work queue be processed. * * Although this may seem unwieldy, it gives the system a way to * pass an argument (in this case the pointer to the cyclades_port * structure) to the bottom half of the driver. Previous kernels * had to poll every port to see if that port needed servicing. */ static void do_cyclades_bh(void *unused) { run_task_queue(&tq_cyclades); } /* do_cyclades_bh */ static void do_softint(void *private_) { struct cyclades_port *info = (struct cyclades_port *) private_; struct tty_struct *tty; tty = info->tty; if (!tty) return; if (clear_bit(Cy_EVENT_HANGUP, &info->event)) { tty_hangup(info->tty); wake_up_interruptible(&info->open_wait); info->flags &= ~(ASYNC_NORMAL_ACTIVE| ASYNC_CALLOUT_ACTIVE); } if (clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) { wake_up_interruptible(&info->open_wait); } if (clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) { if((tty->flags & (1<< TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup){ (tty->ldisc.write_wakeup)(tty); } wake_up_interruptible(&tty->write_wait); } } /* do_softint */ /* * Grab all interrupts in preparation for doing an automatic irq * detection. dontgrab is a mask of irq's _not_ to grab. Returns a * mask of irq's which were grabbed and should therefore be freed * using free_all_interrupts(). */ static int grab_all_interrupts(int dontgrab) { int irq_lines = 0; int i, mask; for (i = 0, mask = 1; i < 16; i++, mask <<= 1) { if (!(mask & dontgrab) && !request_irq(i, cy_probe, SA_INTERRUPT, "serial probe")) { irq_lines |= mask; } } return irq_lines; } /* grab_all_interrupts */ /* * Release all interrupts grabbed by grab_all_interrupts */ static void free_all_interrupts(int irq_lines) { int i; for (i = 0; i < 16; i++) { if (irq_lines & (1 << i)) free_irq(i); } } /* free_all_interrupts */ /* * This routine returns a bitfield of "wild interrupts". Basically, * any unclaimed interrupts which is flapping around. */ static int check_wild_interrupts(void) { int i, mask; int wild_interrupts = 0; int irq_lines; unsigned long timeout; unsigned long flags; /*Turn on interrupts (they may be off) */ save_flags(flags); sti(); irq_lines = grab_all_interrupts(0); /* * Delay for 0.1 seconds -- we use a busy loop since this may * occur during the bootup sequence */ timeout = jiffies+10; while (timeout >= jiffies) ; cy_triggered = 0; /* Reset after letting things settle */ timeout = jiffies+10; while (timeout >= jiffies) ; for (i = 0, mask = 1; i < 16; i++, mask <<= 1) { if ((cy_triggered & (1 << i)) && (irq_lines & (1 << i))) { wild_interrupts |= mask; } } free_all_interrupts(irq_lines); restore_flags(flags); return wild_interrupts; } /* check_wild_interrupts */ /* * This routine is called by do_auto_irq(); it attempts to determine * which interrupt a serial port is configured to use. It is not * fool-proof, but it works a large part of the time. */ static int get_auto_irq(int card) { unsigned long timeout; unsigned char *base_addr; int save_xir, save_car; volatile char vdata; base_addr = (unsigned char*) (cy_card[card].base_addr); intr_base_addr = base_addr; /* * Enable interrupts and see who answers */ cy_irq_triggered = 0; cli(); base_addr[CyCAR] = 0; write_cy_cmd(base_addr,CyCHAN_CTL|CyENB_XMTR); base_addr[CySRER] |= CyTxMpty; sti(); timeout = jiffies+2; while (timeout >= jiffies) { if (cy_irq_triggered) break; } /* * Now check to see if we got any business, and clean up. */ cli(); if(intr_base_addr[CySVRR] != 0){ save_xir = (u_char) intr_base_addr[CyTIR]; save_car = intr_base_addr[CyCAR]; if ((save_xir & 0x3) != 0){ printk("channel %x requesting unexpected interrupt\n",save_xir); } intr_base_addr[CyCAR] = (save_xir & 0x3); intr_base_addr[CySRER] &= ~CyTxMpty; intr_base_addr[CyTIR] = (save_xir & 0x3f); intr_base_addr[CyCAR] = (save_car); vdata = *(intr_base_addr + Cy_ClrIntr); /* Cy_ClrIntr is 0x1800 */ } sti(); return(cy_irq_triggered); } /* get_auto_irq */ /* * Calls get_auto_irq() multiple times, to make sure we don't get * faked out by random interrupts */ static int do_auto_irq(int card) { int irq_lines = 0; int irq_try_1 = 0, irq_try_2 = 0; int retries; unsigned long flags; /* Turn on interrupts (they may be off) */ save_flags(flags); sti(); cy_wild_int_mask = check_wild_interrupts(); irq_lines = grab_all_interrupts(cy_wild_int_mask); for (retries = 0; retries < 5; retries++) { if (!irq_try_1) irq_try_1 = get_auto_irq(card); if (!irq_try_2) irq_try_2 = get_auto_irq(card); if (irq_try_1 && irq_try_2) { if (irq_try_1 == irq_try_2) break; irq_try_1 = irq_try_2 = 0; } } restore_flags(flags); free_all_interrupts(irq_lines); return (irq_try_1 == irq_try_2) ? irq_try_1 : 0; } /* do_auto_irq */ /* This is called whenever a port becomes active; interrupts are enabled and DTR & RTS are turned on. */ static int startup(struct cyclades_port * info) { unsigned long flags; unsigned char *base_addr; int card,chip,channel; if (info->flags & ASYNC_INITIALIZED){ return 0; } if (!info->type){ if (info->tty){ set_bit(TTY_IO_ERROR, &info->tty->flags); } return 0; } if (!info->xmit_buf){ info->xmit_buf = (unsigned char *) get_free_page (GFP_KERNEL); if (!info->xmit_buf){ return -ENOMEM; } } config_setup(info); card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); #ifdef SERIAL_DEBUG_OPEN printk("startup card %d, chip %d, channel %d, base_addr %lx", card, chip, channel, (long)base_addr);/**/ #endif save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyRTPR] = (info->default_timeout ? info->default_timeout : 0x02); /* 10ms rx timeout */ write_cy_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR); base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ base_addr[CyMSVR1] = CyRTS; /* CP('S');CP('1'); */ base_addr[CyMSVR2] = CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: raising DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif base_addr[CySRER] |= CyRxData; info->flags |= ASYNC_INITIALIZED; if (info->tty){ clear_bit(TTY_IO_ERROR, &info->tty->flags); } info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; restore_flags(flags); #ifdef SERIAL_DEBUG_OPEN printk(" done\n"); #endif return 0; } /* startup */ void start_xmit( struct cyclades_port *info ) { unsigned long flags; unsigned char *base_addr; int card,chip,channel; card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = channel; base_addr[CySRER] |= CyTxMpty; restore_flags(flags); } /* start_xmit */ /* * This routine shuts down a serial port; interrupts are disabled, * and DTR is dropped if the hangup on close termio flag is on. */ static void shutdown(struct cyclades_port * info) { unsigned long flags; unsigned char *base_addr; int card,chip,channel; if (!(info->flags & ASYNC_INITIALIZED)){ /* CP('$'); */ return; } card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); #ifdef SERIAL_DEBUG_OPEN printk("shutdown card %d, chip %d, channel %d, base_addr %lx\n", card, chip, channel, (long)base_addr); #endif /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE SENT BEFORE DROPPING THE LINE !!! (Perhaps set some flag that is read when XMTY happens.) Other choices are to delay some fixed interval or schedule some later processing. */ save_flags(flags); cli(); if (info->xmit_buf){ free_page((unsigned long) info->xmit_buf); info->xmit_buf = 0; } base_addr[CyCAR] = (u_char)channel; if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) { base_addr[CyMSVR1] = ~CyRTS; /* CP('C');CP('1'); */ base_addr[CyMSVR2] = ~CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: dropping DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif } write_cy_cmd(base_addr,CyCHAN_CTL|CyDIS_RCVR); /* it may be appropriate to clear _XMIT at some later date (after testing)!!! */ if (info->tty){ set_bit(TTY_IO_ERROR, &info->tty->flags); } info->flags &= ~ASYNC_INITIALIZED; restore_flags(flags); #ifdef SERIAL_DEBUG_OPEN printk(" done\n"); #endif return; } /* shutdown */ /* * This routine finds or computes the various line characteristics. */ static void config_setup(struct cyclades_port * info) { unsigned long flags; unsigned char *base_addr; int card,chip,channel; unsigned cflag; int i; if (!info->tty || !info->tty->termios){ return; } if (info->line == -1){ return; } cflag = info->tty->termios->c_cflag; /* baud rate */ i = cflag & CBAUD; #ifdef CBAUDEX /* Starting with kernel 1.1.65, there is direct support for higher baud rates. The following code supports those changes. The conditional aspect allows this driver to be used for earlier as well as later kernel versions. (The mapping is slightly different from serial.c because there is still the possibility of supporting 75 kbit/sec with the Cyclades board.) */ if (i & CBAUDEX) { if (i == B57600) i = 16; else if(i == B115200) i = 18; #ifdef B78600 else if(i == B78600) i = 17; #endif else info->tty->termios->c_cflag &= ~CBAUDEX; } #endif if (i == 15) { if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) i += 1; if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) i += 3; } info->tbpr = baud_bpr[i]; /* Tx BPR */ info->tco = baud_co[i]; /* Tx CO */ info->rbpr = baud_bpr[i]; /* Rx BPR */ info->rco = baud_co[i]; /* Rx CO */ if (baud_table[i] == 134) { info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2; /* get it right for 134.5 baud */ } else if (baud_table[i]) { info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2; /* this needs to be propagated into the card info */ } else { info->timeout = 0; } /* By tradition (is it a standard?) a baud rate of zero implies the line should be/has been closed. A bit later in this routine such a test is performed. */ /* byte size and parity */ info->cor5 = 0; info->cor4 = 0; info->cor3 = (info->default_threshold ? info->default_threshold : baud_cor3[i]); /* receive threshold */ info->cor2 = CyETC; switch(cflag & CSIZE){ case CS5: info->cor1 = Cy_5_BITS; break; case CS6: info->cor1 = Cy_6_BITS; break; case CS7: info->cor1 = Cy_7_BITS; break; case CS8: info->cor1 = Cy_8_BITS; break; } if(cflag & CSTOPB){ info->cor1 |= Cy_2_STOP; } if (cflag & PARENB){ if (cflag & PARODD){ info->cor1 |= CyPARITY_O; }else{ info->cor1 |= CyPARITY_E; } }else{ info->cor1 |= CyPARITY_NONE; } /* CTS flow control flag */ if (cflag & CRTSCTS){ info->flags |= ASYNC_CTS_FLOW; info->cor2 |= CyCtsAE; }else{ info->flags &= ~ASYNC_CTS_FLOW; info->cor2 &= ~CyCtsAE; } if (cflag & CLOCAL) info->flags &= ~ASYNC_CHECK_CD; else info->flags |= ASYNC_CHECK_CD; /*********************************************** The hardware option, CyRtsAO, presents RTS when the chip has characters to send. Since most modems use RTS as reverse (inbound) flow control, this option is not used. If inbound flow control is necessary, DTR can be programmed to provide the appropriate signals for use with a non-standard cable. Contact Marcio Saito for details. ***********************************************/ card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* tx and rx baud rate */ base_addr[CyTCOR] = info->tco; base_addr[CyTBPR] = info->tbpr; base_addr[CyRCOR] = info->rco; base_addr[CyRBPR] = info->rbpr; /* set line characteristics according configuration */ base_addr[CySCHR1] = START_CHAR(info->tty); base_addr[CySCHR2] = STOP_CHAR(info->tty); base_addr[CyCOR1] = info->cor1; base_addr[CyCOR2] = info->cor2; base_addr[CyCOR3] = info->cor3; base_addr[CyCOR4] = info->cor4; base_addr[CyCOR5] = info->cor5; write_cy_cmd(base_addr,CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch); base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */ base_addr[CyRTPR] = (info->default_timeout ? info->default_timeout : 0x02); /* 10ms rx timeout */ if (C_CLOCAL(info->tty)) { base_addr[CySRER] |= 0; /* without modem intr */ /* ignore 1->0 modem transitions */ base_addr[CyMCOR1] = 0x0; /* ignore 0->1 modem transitions */ base_addr[CyMCOR2] = 0x0; } else { base_addr[CySRER] |= CyMdmCh; /* with modem intr */ /* act on 1->0 modem transitions */ base_addr[CyMCOR1] = CyDSR|CyCTS|CyRI|CyDCD; /* act on 0->1 modem transitions */ base_addr[CyMCOR2] = CyDSR|CyCTS|CyRI|CyDCD; } if(i == 0){ /* baud rate is zero, turn off line */ base_addr[CyMSVR2] = ~CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: dropping DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif }else{ base_addr[CyMSVR2] = CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: raising DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif } if (info->tty){ clear_bit(TTY_IO_ERROR, &info->tty->flags); } restore_flags(flags); } /* config_setup */ static void cy_put_char(struct tty_struct *tty, unsigned char ch) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; #ifdef SERIAL_DEBUG_IO printk("cy_put_char ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->device, "cy_put_char")) return; if (!tty || !info->xmit_buf) return; save_flags(flags); cli(); if (info->xmit_cnt >= PAGE_SIZE - 1) { restore_flags(flags); return; } info->xmit_buf[info->xmit_head++] = ch; info->xmit_head &= PAGE_SIZE - 1; info->xmit_cnt++; restore_flags(flags); } /* cy_put_char */ static void cy_flush_chars(struct tty_struct *tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; unsigned char *base_addr; int card,chip,channel; #ifdef SERIAL_DEBUG_IO printk("cy_flush_chars ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_flush_chars")) return; if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || !info->xmit_buf) return; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = channel; base_addr[CySRER] |= CyTxMpty; restore_flags(flags); } /* cy_flush_chars */ /* This routine gets called when tty_write has put something into the write_queue. If the port is not already transmitting stuff, start it off by enabling interrupts. The interrupt service routine will then ensure that the characters are sent. If the port is already active, there is no need to kick it. */ static int cy_write(struct tty_struct * tty, int from_user, unsigned char *buf, int count) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; int c, total = 0; #ifdef SERIAL_DEBUG_IO printk("cy_write ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_write")){ return 0; } if (!tty || !info->xmit_buf || !tmp_buf){ return 0; } while (1) { save_flags(flags); cli(); c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head)); if (c <= 0){ restore_flags(flags); break; } if (from_user) { down(&tmp_buf_sem); memcpy_fromfs(tmp_buf, buf, c); c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head)); memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c); up(&tmp_buf_sem); } else memcpy(info->xmit_buf + info->xmit_head, buf, c); info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1); info->xmit_cnt += c; restore_flags(flags); buf += c; count -= c; total += c; } if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped ) { start_xmit(info); } return total; } /* cy_write */ static int cy_write_room(struct tty_struct *tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; int ret; #ifdef SERIAL_DEBUG_IO printk("cy_write_room ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_write_room")) return 0; ret = PAGE_SIZE - info->xmit_cnt - 1; if (ret < 0) ret = 0; return ret; } /* cy_write_room */ static int cy_chars_in_buffer(struct tty_struct *tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; #ifdef SERIAL_DEBUG_IO printk("cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_chars_in_buffer")) return 0; return info->xmit_cnt; } /* cy_chars_in_buffer */ static void cy_flush_buffer(struct tty_struct *tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; #ifdef SERIAL_DEBUG_IO printk("cy_flush_buffer ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_flush_buffer")) return; save_flags(flags); cli(); info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; restore_flags(flags); wake_up_interruptible(&tty->write_wait); if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup) (tty->ldisc.write_wakeup)(tty); } /* cy_flush_buffer */ /* This routine is called by the upper-layer tty layer to signal that incoming characters should be throttled or that the throttle should be released. */ static void cy_throttle(struct tty_struct * tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; unsigned char *base_addr; int card,chip,channel; #ifdef SERIAL_DEBUG_THROTTLE char buf[64]; printk("throttle %s: %d....\n", _tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty)); printk("cy_throttle ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->device, "cy_nthrottle")){ return; } if (I_IXOFF(tty)) { info->x_char = STOP_CHAR(tty); /* Should use the "Send Special Character" feature!!! */ } card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = ~CyRTS; restore_flags(flags); return; } /* cy_throttle */ static void cy_unthrottle(struct tty_struct * tty) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; unsigned long flags; unsigned char *base_addr; int card,chip,channel; #ifdef SERIAL_DEBUG_THROTTLE char buf[64]; printk("throttle %s: %d....\n", _tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty)); printk("cy_unthrottle ttyC%d\n", info->line); #endif if (serial_paranoia_check(info, tty->device, "cy_nthrottle")){ return; } if (I_IXOFF(tty)) { info->x_char = START_CHAR(tty); /* Should use the "Send Special Character" feature!!! */ } card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = CyRTS; restore_flags(flags); return; } /* cy_unthrottle */ static int get_serial_info(struct cyclades_port * info, struct serial_struct * retinfo) { struct serial_struct tmp; struct cyclades_card *cinfo = &cy_card[info->card]; /* CP('g'); */ if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.type = info->type; tmp.line = info->line; tmp.port = info->card * 0x100 + info->line - cinfo->first_line; tmp.irq = cinfo->irq; tmp.flags = info->flags; tmp.baud_base = 0; /*!!!*/ tmp.close_delay = info->close_delay; tmp.custom_divisor = 0; /*!!!*/ tmp.hub6 = 0; /*!!!*/ memcpy_tofs(retinfo,&tmp,sizeof(*retinfo)); return 0; } /* get_serial_info */ static int set_serial_info(struct cyclades_port * info, struct serial_struct * new_info) { struct serial_struct new_serial; struct cyclades_port old_info; /* CP('s'); */ if (!new_info) return -EFAULT; memcpy_fromfs(&new_serial,new_info,sizeof(new_serial)); old_info = *info; if (!suser()) { if ((new_serial.close_delay != info->close_delay) || ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) != (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))) return -EPERM; info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK)); goto check_and_exit; } /* * OK, past this point, all the error checking has been done. * At this point, we start making changes..... */ info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS)); info->close_delay = new_serial.close_delay; check_and_exit: if (info->flags & ASYNC_INITIALIZED){ config_setup(info); return 0; }else{ return startup(info); } } /* set_serial_info */ static int get_modem_info(struct cyclades_port * info, unsigned int *value) { int card,chip,channel; unsigned char *base_addr; unsigned long flags; unsigned char status; unsigned int result; card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; status = base_addr[CyMSVR1] | base_addr[CyMSVR2]; restore_flags(flags); result = ((status & CyRTS) ? TIOCM_RTS : 0) | ((status & CyDTR) ? TIOCM_DTR : 0) | ((status & CyDCD) ? TIOCM_CAR : 0) | ((status & CyRI) ? TIOCM_RNG : 0) | ((status & CyDSR) ? TIOCM_DSR : 0) | ((status & CyCTS) ? TIOCM_CTS : 0); put_fs_long(result,(unsigned long *) value); return 0; } /* get_modem_info */ static int set_modem_info(struct cyclades_port * info, unsigned int cmd, unsigned int *value) { int card,chip,channel; unsigned char *base_addr; unsigned long flags; unsigned int arg = get_fs_long((unsigned long *) value); card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); switch (cmd) { case TIOCMBIS: if (arg & TIOCM_RTS){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = CyRTS; restore_flags(flags); } if (arg & TIOCM_DTR){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* CP('S');CP('2'); */ base_addr[CyMSVR2] = CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: raising DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif restore_flags(flags); } break; case TIOCMBIC: if (arg & TIOCM_RTS){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = ~CyRTS; restore_flags(flags); } if (arg & TIOCM_DTR){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* CP('C');CP('2'); */ base_addr[CyMSVR2] = ~CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: dropping DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif restore_flags(flags); } break; case TIOCMSET: if (arg & TIOCM_RTS){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = CyRTS; restore_flags(flags); }else{ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = ~CyRTS; restore_flags(flags); } if (arg & TIOCM_DTR){ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* CP('S');CP('3'); */ base_addr[CyMSVR2] = CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: raising DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif restore_flags(flags); }else{ save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* CP('C');CP('3'); */ base_addr[CyMSVR2] = ~CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: dropping DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif restore_flags(flags); } break; default: return -EINVAL; } return 0; } /* set_modem_info */ static void send_break( struct cyclades_port * info, int duration) { /* Let the transmit ISR take care of this (since it requires stuffing characters into the output stream). */ info->x_break = duration; if (!info->xmit_cnt ) { start_xmit(info); } } /* send_break */ static int get_mon_info(struct cyclades_port * info, struct cyclades_monitor * mon) { memcpy_tofs(mon, &info->mon, sizeof(struct cyclades_monitor)); info->mon.int_count = 0; info->mon.char_count = 0; info->mon.char_max = 0; info->mon.char_last = 0; return 0; } static int set_threshold(struct cyclades_port * info, unsigned long value) { unsigned char *base_addr; int card,channel,chip; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); info->cor3 &= ~CyREC_FIFO; info->cor3 |= value & CyREC_FIFO; base_addr[CyCOR3] = info->cor3; write_cy_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch); return 0; } static int get_threshold(struct cyclades_port * info, unsigned long *value) { unsigned char *base_addr; int card,channel,chip; unsigned long tmp; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); tmp = base_addr[CyCOR3] & CyREC_FIFO; put_fs_long(tmp,value); return 0; } static int set_default_threshold(struct cyclades_port * info, unsigned long value) { info->default_threshold = value & 0x0f; return 0; } static int get_default_threshold(struct cyclades_port * info, unsigned long *value) { put_fs_long(info->default_threshold,value); return 0; } static int set_timeout(struct cyclades_port * info, unsigned long value) { unsigned char *base_addr; int card,channel,chip; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); base_addr[CyRTPR] = value & 0xff; return 0; } static int get_timeout(struct cyclades_port * info, unsigned long *value) { unsigned char *base_addr; int card,channel,chip; unsigned long tmp; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); tmp = base_addr[CyRTPR]; put_fs_long(tmp,value); return 0; } static int set_default_timeout(struct cyclades_port * info, unsigned long value) { info->default_timeout = value & 0xff; return 0; } static int get_default_timeout(struct cyclades_port * info, unsigned long *value) { put_fs_long(info->default_timeout,value); return 0; } static int cy_ioctl(struct tty_struct *tty, struct file * file, unsigned int cmd, unsigned long arg) { int error; struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; int ret_val = 0; #ifdef SERIAL_DEBUG_OTHER printk("cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */ #endif switch (cmd) { case CYGETMON: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(struct cyclades_monitor)); if (error){ ret_val = error; break; } ret_val = get_mon_info(info, (struct cyclades_monitor *)arg); break; case CYGETTHRESH: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned long)); if (error){ ret_val = error; break; } ret_val = get_threshold(info, (unsigned long *)arg); break; case CYSETTHRESH: ret_val = set_threshold(info, (unsigned long)arg); break; case CYGETDEFTHRESH: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned long)); if (error){ ret_val = error; break; } ret_val = get_default_threshold(info, (unsigned long *)arg); break; case CYSETDEFTHRESH: ret_val = set_default_threshold(info, (unsigned long)arg); break; case CYGETTIMEOUT: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned long)); if (error){ ret_val = error; break; } ret_val = get_timeout(info, (unsigned long *)arg); break; case CYSETTIMEOUT: ret_val = set_timeout(info, (unsigned long)arg); break; case CYGETDEFTIMEOUT: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned long)); if (error){ ret_val = error; break; } ret_val = get_default_timeout(info, (unsigned long *)arg); break; case CYSETDEFTIMEOUT: ret_val = set_default_timeout(info, (unsigned long)arg); break; case TCSBRK: /* SVID version: non-zero arg --> no break */ ret_val = tty_check_change(tty); if (ret_val) return ret_val; tty_wait_until_sent(tty,0); if (!arg) send_break(info, HZ/4); /* 1/4 second */ break; case TCSBRKP: /* support for POSIX tcsendbreak() */ ret_val = tty_check_change(tty); if (ret_val) return ret_val; tty_wait_until_sent(tty,0); send_break(info, arg ? arg*(HZ/10) : HZ/4); break; case TIOCMBIS: case TIOCMBIC: case TIOCMSET: ret_val = set_modem_info(info, cmd, (unsigned int *) arg); break; /* The following commands are incompletely implemented!!! */ case TIOCGSOFTCAR: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned int *)); if (error){ ret_val = error; break; } put_fs_long(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg); break; case TIOCSSOFTCAR: arg = get_fs_long((unsigned long *) arg); tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); break; case TIOCMGET: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(unsigned int *)); if (error){ ret_val = error; break; } ret_val = get_modem_info(info, (unsigned int *) arg); break; case TIOCGSERIAL: error = verify_area(VERIFY_WRITE, (void *) arg ,sizeof(struct serial_struct)); if (error){ ret_val = error; break; } ret_val = get_serial_info(info, (struct serial_struct *) arg); break; case TIOCSSERIAL: ret_val = set_serial_info(info, (struct serial_struct *) arg); break; default: ret_val = -ENOIOCTLCMD; } #ifdef SERIAL_DEBUG_OTHER printk("cy_ioctl done\n"); #endif return ret_val; } /* cy_ioctl */ static void cy_set_termios(struct tty_struct *tty, struct termios * old_termios) { struct cyclades_port *info = (struct cyclades_port *)tty->driver_data; #ifdef SERIAL_DEBUG_OTHER printk("cy_set_termios ttyC%d\n", info->line); #endif if (tty->termios->c_cflag == old_termios->c_cflag) return; config_setup(info); if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { tty->stopped = 0; cy_start(tty); } #ifdef tytso_patch_94Nov25_1726 if (!(old_termios->c_cflag & CLOCAL) && (tty->termios->c_cflag & CLOCAL)) wake_up_interruptible(&info->open_wait); #endif return; } /* cy_set_termios */ static void cy_close(struct tty_struct * tty, struct file * filp) { struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; /* CP('C'); */ #ifdef SERIAL_DEBUG_OTHER printk("cy_close ttyC%d\n", info->line); #endif if (!info || serial_paranoia_check(info, tty->device, "cy_close")){ return; } #ifdef SERIAL_DEBUG_OPEN printk("cy_close ttyC%d, count = %d\n", info->line, info->count); #endif if ((tty->count == 1) && (info->count != 1)) { /* * Uh, oh. tty->count is 1, which means that the tty * structure will be freed. Info->count should always * be one in these conditions. If it's greater than * one, we've got real problems, since it means the * serial port won't be shutdown. */ printk("cy_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count); info->count = 1; } #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1); #endif if (--info->count < 0) { printk("cy_close: bad serial port count for ttys%d: %d\n", info->line, info->count); #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: setting count to 0\n", __LINE__); #endif info->count = 0; } if (info->count) return; info->flags |= ASYNC_CLOSING; /* * Save the termios structure, since this port may have * separate termios for callout and dialin. */ if (info->flags & ASYNC_NORMAL_ACTIVE) info->normal_termios = *tty->termios; if (info->flags & ASYNC_CALLOUT_ACTIVE) info->callout_termios = *tty->termios; if (info->flags & ASYNC_INITIALIZED) tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */ shutdown(info); if (tty->driver.flush_buffer) tty->driver.flush_buffer(tty); if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty); info->event = 0; info->tty = 0; if (tty->ldisc.num != ldiscs[N_TTY].num) { if (tty->ldisc.close) (tty->ldisc.close)(tty); tty->ldisc = ldiscs[N_TTY]; tty->termios->c_line = N_TTY; if (tty->ldisc.open) (tty->ldisc.open)(tty); } if (info->blocked_open) { if (info->close_delay) { current->state = TASK_INTERRUPTIBLE; current->timeout = jiffies + info->close_delay; schedule(); } wake_up_interruptible(&info->open_wait); } info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE| ASYNC_CLOSING); wake_up_interruptible(&info->close_wait); #ifdef SERIAL_DEBUG_OTHER printk("cy_close done\n"); #endif return; } /* cy_close */ /* * cy_hangup() --- called by tty_hangup() when a hangup is signaled. */ void cy_hangup(struct tty_struct *tty) { struct cyclades_port * info = (struct cyclades_port *)tty->driver_data; #ifdef SERIAL_DEBUG_OTHER printk("cy_hangup ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_hangup")) return; shutdown(info); #if 0 info->event = 0; info->count = 0; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: setting count to 0\n", __LINE__); #endif info->tty = 0; #endif info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE); wake_up_interruptible(&info->open_wait); } /* cy_hangup */ /* * ------------------------------------------------------------ * cy_open() and friends * ------------------------------------------------------------ */ static int block_til_ready(struct tty_struct *tty, struct file * filp, struct cyclades_port *info) { struct wait_queue wait = { current, NULL }; struct cyclades_card *cinfo; unsigned long flags; int chip, channel; int retval; char *base_addr; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ if (info->flags & ASYNC_CLOSING) { interruptible_sleep_on(&info->close_wait); if (info->flags & ASYNC_HUP_NOTIFY){ return -EAGAIN; }else{ return -ERESTARTSYS; } } /* * If this is a callout device, then just make sure the normal * device isn't being used. */ if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) { if (info->flags & ASYNC_NORMAL_ACTIVE){ return -EBUSY; } if ((info->flags & ASYNC_CALLOUT_ACTIVE) && (info->flags & ASYNC_SESSION_LOCKOUT) && (info->session != current->session)){ return -EBUSY; } if ((info->flags & ASYNC_CALLOUT_ACTIVE) && (info->flags & ASYNC_PGRP_LOCKOUT) && (info->pgrp != current->pgrp)){ return -EBUSY; } info->flags |= ASYNC_CALLOUT_ACTIVE; return 0; } /* * If non-blocking mode is set, then make the check up front * and then exit. */ if (filp->f_flags & O_NONBLOCK) { if (info->flags & ASYNC_CALLOUT_ACTIVE){ return -EBUSY; } info->flags |= ASYNC_NORMAL_ACTIVE; return 0; } /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in * this loop, info->count is dropped by one, so that * cy_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; add_wait_queue(&info->open_wait, &wait); #ifdef SERIAL_DEBUG_OPEN printk("block_til_ready before block: ttyC%d, count = %d\n", info->line, info->count);/**/ #endif info->count--; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count); #endif info->blocked_open++; cinfo = &cy_card[info->card]; channel = info->line - cinfo->first_line; chip = channel>>2; channel &= 0x03; base_addr = (char *) (cinfo->base_addr + cy_chip_offset[chip]); while (1) { save_flags(flags); cli(); if (!(info->flags & ASYNC_CALLOUT_ACTIVE)){ base_addr[CyCAR] = (u_char)channel; base_addr[CyMSVR1] = CyRTS; /* CP('S');CP('4'); */ base_addr[CyMSVR2] = CyDTR; #ifdef SERIAL_DEBUG_DTR printk("cyc: %d: raising DTR\n", __LINE__); printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]); #endif } restore_flags(flags); current->state = TASK_INTERRUPTIBLE; if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED) ){ if (info->flags & ASYNC_HUP_NOTIFY) { retval = -EAGAIN; }else{ retval = -ERESTARTSYS; } break; } save_flags(flags); cli(); base_addr[CyCAR] = (u_char)channel; /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */ if (!(info->flags & ASYNC_CALLOUT_ACTIVE) && !(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || (base_addr[CyMSVR1] & CyDCD))) { restore_flags(flags); break; } restore_flags(flags); if (current->signal & ~current->blocked) { retval = -ERESTARTSYS; break; } #ifdef SERIAL_DEBUG_OPEN printk("block_til_ready blocking: ttyC%d, count = %d\n", info->line, info->count);/**/ #endif schedule(); } current->state = TASK_RUNNING; remove_wait_queue(&info->open_wait, &wait); if (!tty_hung_up_p(filp)){ info->count++; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); #endif } info->blocked_open--; #ifdef SERIAL_DEBUG_OPEN printk("block_til_ready after blocking: ttyC%d, count = %d\n", info->line, info->count);/**/ #endif if (retval) return retval; info->flags |= ASYNC_NORMAL_ACTIVE; return 0; } /* block_til_ready */ /* * This routine is called whenever a serial port is opened. It * performs the serial-specific initialization for the tty structure. */ int cy_open(struct tty_struct *tty, struct file * filp) { struct cyclades_port *info; int retval, line; /* CP('O'); */ line = MINOR(tty->device) - tty->driver.minor_start; if ((line < 0) || (NR_PORTS <= line)){ return -ENODEV; } info = &cy_port[line]; if (info->line < 0){ return -ENODEV; } #ifdef SERIAL_DEBUG_OTHER printk("cy_open ttyC%d\n", info->line); /* */ #endif if (serial_paranoia_check(info, tty->device, "cy_open")){ return -ENODEV; } #ifdef SERIAL_DEBUG_OPEN printk("cy_open ttyC%d, count = %d\n", info->line, info->count);/**/ #endif info->count++; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count); #endif tty->driver_data = info; info->tty = tty; if (!tmp_buf) { tmp_buf = (unsigned char *) get_free_page(GFP_KERNEL); if (!tmp_buf){ return -ENOMEM; } } if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) { if (tty->driver.subtype == SERIAL_TYPE_NORMAL) *tty->termios = info->normal_termios; else *tty->termios = info->callout_termios; } /* * Start up serial port */ retval = startup(info); if (retval){ return retval; } retval = block_til_ready(tty, filp, info); if (retval) { #ifdef SERIAL_DEBUG_OPEN printk("cy_open returning after block_til_ready with %d\n", retval); #endif return retval; } info->session = current->session; info->pgrp = current->pgrp; #ifdef SERIAL_DEBUG_OPEN printk("cy_open done\n");/**/ #endif return 0; } /* cy_open */ /* * --------------------------------------------------------------------- * cy_init() and friends * * cy_init() is called at boot-time to initialize the serial driver. * --------------------------------------------------------------------- */ /* * This routine prints out the appropriate serial driver version * number, and identifies which options were configured into this * driver. */ static void show_version(void) { printk("Cyclom driver %s\n",rcsid); } /* show_version */ /* initialize chips on card -- return number of valid chips (which is number of ports/4) */ int cy_init_card(unsigned char *true_base_addr) { volatile unsigned short discard; unsigned int chip_number; unsigned char* base_addr; discard = true_base_addr[Cy_HwReset]; /* Cy_HwReset is 0x1400 */ discard = true_base_addr[Cy_ClrIntr]; /* Cy_ClrIntr is 0x1800 */ udelay(500L); for(chip_number=0; chip_numbernum_chips = cy_init_card((unsigned char *)cinfo->base_addr))){ /* this card is not present */ continue; } #ifndef CY_DONT_PROBE /* find out the board's irq by probing */ cinfo->irq = do_auto_irq(index); #endif /** bind IRQ to card **/ if (cinfo->irq) { retval = request_irq(cinfo->irq, cy_interrupt, SA_INTERRUPT, "cyclades"); if (retval){ printk("request_irq returned %d\n",retval); /* return retval; */ } IRQ_cards[cinfo->irq] = cinfo; }else{ printk("couldn't get board's irq\n"); continue; } printk(" share IRQ %d: ", cinfo->irq); good_ports = 4 * cinfo->num_chips; if(port_num < NR_PORTS){ cinfo->first_line = port_num; while( good_ports-- && port_num < NR_PORTS){ /*** initialize port ***/ info->magic = CYCLADES_MAGIC; info->type = PORT_CIRRUS; info->card = index; info->line = port_num; info->flags = STD_COM_FLAGS; info->tty = 0; info->xmit_fifo_size = 12; info->cor1 = CyPARITY_NONE|Cy_1_STOP|Cy_8_BITS; info->cor2 = CyETC; info->cor3 = 0x08; /* _very_ small receive threshold */ info->cor4 = 0; info->cor5 = 0; info->tbpr = baud_bpr[13]; /* Tx BPR */ info->tco = baud_co[13]; /* Tx CO */ info->rbpr = baud_bpr[13]; /* Rx BPR */ info->rco = baud_co[13]; /* Rx CO */ info->close_delay = 0; info->x_char = 0; info->event = 0; info->count = 0; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: setting count to 0\n", __LINE__); #endif info->blocked_open = 0; info->default_threshold = 0; info->default_timeout = 0; info->tqueue.routine = do_softint; info->tqueue.data = info; info->callout_termios =cy_callout_driver.init_termios; info->normal_termios = cy_serial_driver.init_termios; info->open_wait = 0; info->close_wait = 0; /* info->session */ /* info->pgrp */ /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/ info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK | CyPARITY| CyFRAME| CyOVERRUN; /* info->timeout */ printk("ttyC%1d ", info->line); port_num++;info++; if(!(port_num & 7)){ printk("\n "); } } }else{ cinfo->first_line = -1; } printk("\n"); } while( port_num < NR_PORTS){ info->line = -1; port_num++;info++; } return kmem_start; } /* cy_init */ #ifdef CYCLOM_SHOW_STATUS static void show_status(int line_num) { unsigned char *base_addr; int card,chip,channel; struct cyclades_port * info; unsigned long flags; info = &cy_port[line_num]; card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; printk(" card %d, chip %d, channel %d\n", card, chip, channel);/**/ printk(" cy_card\n"); printk(" irq base_addr num_chips first_line = %d %lx %d %d\n", cy_card[card].irq, (long)cy_card[card].base_addr, cy_card[card].num_chips, cy_card[card].first_line); printk(" cy_port\n"); printk(" card line flags = %d %d %x\n", info->card, info->line, info->flags); printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n", (long)info->tty, info->read_status_mask, info->timeout, info->xmit_fifo_size); printk(" cor1,cor2,cor3,cor4,cor5 = %x %x %x %x %x\n", info->cor1, info->cor2, info->cor3, info->cor4, info->cor5); printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco, info->rbpr, info->rco); printk(" close_delay event count = %d %d %d\n", info->close_delay, info->event, info->count); printk(" x_char blocked_open = %x %x\n", info->x_char, info->blocked_open); printk(" session pgrp open_wait = %lx %lx %lx\n", info->session, info->pgrp, (long)info->open_wait); save_flags(flags); cli(); base_addr = (unsigned char*) (cy_card[card].base_addr + cy_chip_offset[chip]); /* Global Registers */ printk(" CyGFRCR %x\n", base_addr[CyGFRCR]); printk(" CyCAR %x\n", base_addr[CyCAR]); printk(" CyGCR %x\n", base_addr[CyGCR]); printk(" CySVRR %x\n", base_addr[CySVRR]); printk(" CyRICR %x\n", base_addr[CyRICR]); printk(" CyTICR %x\n", base_addr[CyTICR]); printk(" CyMICR %x\n", base_addr[CyMICR]); printk(" CyRIR %x\n", base_addr[CyRIR]); printk(" CyTIR %x\n", base_addr[CyTIR]); printk(" CyMIR %x\n", base_addr[CyMIR]); printk(" CyPPR %x\n", base_addr[CyPPR]); base_addr[CyCAR] = (u_char)channel; /* Virtual Registers */ printk(" CyRIVR %x\n", base_addr[CyRIVR]); printk(" CyTIVR %x\n", base_addr[CyTIVR]); printk(" CyMIVR %x\n", base_addr[CyMIVR]); printk(" CyMISR %x\n", base_addr[CyMISR]); /* Channel Registers */ printk(" CyCCR %x\n", base_addr[CyCCR]); printk(" CySRER %x\n", base_addr[CySRER]); printk(" CyCOR1 %x\n", base_addr[CyCOR1]); printk(" CyCOR2 %x\n", base_addr[CyCOR2]); printk(" CyCOR3 %x\n", base_addr[CyCOR3]); printk(" CyCOR4 %x\n", base_addr[CyCOR4]); printk(" CyCOR5 %x\n", base_addr[CyCOR5]); printk(" CyCCSR %x\n", base_addr[CyCCSR]); printk(" CyRDCR %x\n", base_addr[CyRDCR]); printk(" CySCHR1 %x\n", base_addr[CySCHR1]); printk(" CySCHR2 %x\n", base_addr[CySCHR2]); printk(" CySCHR3 %x\n", base_addr[CySCHR3]); printk(" CySCHR4 %x\n", base_addr[CySCHR4]); printk(" CySCRL %x\n", base_addr[CySCRL]); printk(" CySCRH %x\n", base_addr[CySCRH]); printk(" CyLNC %x\n", base_addr[CyLNC]); printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]); printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]); printk(" CyRTPR %x\n", base_addr[CyRTPR]); printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]); printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]); printk(" CyRBPR %x\n", base_addr[CyRBPR]); printk(" CyRCOR %x\n", base_addr[CyRCOR]); printk(" CyTBPR %x\n", base_addr[CyTBPR]); printk(" CyTCOR %x\n", base_addr[CyTCOR]); restore_flags(flags); } /* show_status */ #endif