static char rcsid[] = "$Revision: 1.36.3.9 $$Date: 1996/10/07 19:47:13 $"; /* * linux/drivers/char/cyclades.c * * This file contains the driver for the Cyclades Cyclom-Y multiport * serial boards. * * Maintained by Marcio Saito (marcio@cyclades.com) and * Randolph Bentson (bentson@grieg.seaslug.org) * * For Technical support and installation problems, please send e-mail * to support@cyclades.com. * * 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: * int cy_init(void); * int cy_open(struct tty_struct *tty, struct file *filp); * * $Log: cyclades.c,v $ * Revision 1.36.3.9 1996/10/07 19:47:13 bentson * add MOD_DEC_USE_COUNT in one return from cy_close (as * noted by Jon Lewis ) * * Revision 1.36.3.8 1996/06/07 16:29:00 bentson * starting minor number at zero; added missing verify_area * as noted by Heiko Eissfeldt * * Revision 1.36.3.7 1996/04/19 21:06:18 bentson * remove unneeded boot message & fix CLOCAL hardware flow * control (Miquel van Smoorenburg ); * remove unused diagnostic statements; minor 0 is first; * * Revision 1.36.3.6 1996/03/13 13:21:17 marcio * The kernel function vremap (available only in later 1.3.xx kernels) * allows the access to memory addresses above the RAM. This revision * of the driver supports PCI boards below 1Mb (device id 0x100) and * above 1Mb (device id 0x101). * * Revision 1.36.3.5 1996/03/07 15:20:17 bentson * Some global changes to interrupt handling spilled into * this driver--mostly unused arguments in system function * calls. Also added change by Marcio Saito which should * reduce lost interrupts at startup by fast processors. * * Revision 1.36.3.4 1995/11/13 20:45:10 bentson * Changes by Corey Minyard distributed * in 1.3.41 kernel to remove a possible race condition, extend * some error messages, and let the driver run as a loadable module * Change by Alan Wendt to remove a * possible race condition. * Change by Marcio Saito to fix PCI addressing. * * Revision 1.36.3.3 1995/11/13 19:44:48 bentson * Changes by Linus Torvalds in 1.3.33 kernel distribution * required due to reordering of driver initialization. * Drivers are now initialized *after* memory management. * * Revision 1.36.3.2 1995/09/08 22:07:14 bentson * remove printk from ISR; fix typo * * Revision 1.36.3.1 1995/09/01 12:00:42 marcio * Minor fixes in the PCI board support. PCI function calls in * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan * . "bad serial count" message removed. * * Revision 1.36.3 1995/08/22 09:19:42 marcio * Cyclom-Y/PCI support added. Changes in the cy_init routine and * board initialization. Changes in the boot messages. The driver * supports up to 4 boards and 64 ports by default. * * 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 #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 *); #ifdef CYCLOM_SHOW_STATUS static void show_status(int); #endif static inline int serial_paranoia_check(struct cyclades_port *info, kdev_t device, const char *routine) { #ifdef SERIAL_PARANOIA_CHECK static const char *badmagic = "Warning: bad magic number for serial struct (%s) in %s\n"; static const char *badinfo = "Warning: null cyclades_port for (%s) in %s\n"; static const char *badrange = "Warning: cyclades_port out of range for (%s) in %s\n"; if (!info) { printk(badinfo, kdevname(device), routine); return 1; } if( (long)info < (long)(&cy_port[0]) || (long)(&cy_port[NR_PORTS]) < (long)info ){ printk(badrange, kdevname(device), routine); return 1; } if (info->magic != CYCLADES_MAGIC) { printk(badmagic, kdevname(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); } void CP(char data){ unsigned long flags; char scrn[2]; save_flags(flags); cli(); scrn[0] = data; scrn[1] = '\0'; 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, int index) { 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<driver_data; unsigned char *base_addr; int chip,channel,index; 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]; index = cinfo->bus_index; 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]<driver_data; unsigned char *base_addr; int chip,channel,index; 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]; index = cinfo->bus_index; 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]<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 */ static int probe_ready; /* * This interrupt routine is used * while we are probing for submarines. */ static void cy_probe(int irq, void *dev_id, struct pt_regs *regs) { int save_xir, save_car; int index = 0; /* probing interrupts is only for ISA */ if (!probe_ready) { *(intr_base_addr + (Cy_ClrIntr<base_addr; index = cinfo->bus_index; /* 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]<first_line; info = &cy_port[i]; info->last_active = jiffies; save_car = base_addr[CyCAR<tty == 0){ j = (base_addr[CyRIVR<tty; j = (base_addr[CyRIVR<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<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<flip.flag_buf_ptr++ = TTY_PARITY; *tty->flip.char_buf_ptr++ = base_addr[CyRDSR<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<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<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<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<first_line; save_car = base_addr[CyCAR<last_active = jiffies; if(info->tty == 0){ base_addr[CySRER<xmit_fifo_size; if(info->x_char) { /* send special char */ outch = info->x_char; base_addr[CyTDR<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<x_break*200/HZ; base_addr[CyTDR<x_break = 0; } while (char_count-- > 0){ if (!info->xmit_cnt){ base_addr[CySRER<xmit_buf == 0){ base_addr[CySRER<tty->stopped || info->tty->hw_stopped){ base_addr[CySRER<xmit_buf[info->xmit_tail]; if( outch ){ info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (PAGE_SIZE - 1); base_addr[CyTDR< 1){ info->xmit_cnt--; info->xmit_tail = (info->xmit_tail + 1) & (PAGE_SIZE - 1); base_addr[CyTDR<xmit_cnt < WAKEUP_CHARS) { cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP); } txend: /* end of service */ base_addr[CyTIR<first_line]; info->last_active = jiffies; save_car = base_addr[CyCAR<tty == 0){ /* nowhere to put the data, ignore it */ ; }else{ if((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)){ if(mdm_status & CyDCD){ cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP); }else if(!((info->flags & ASYNC_CALLOUT_ACTIVE) &&(info->flags & ASYNC_CALLOUT_NOHUP))){ cy_sched_event(info, Cy_EVENT_HANGUP); } } if((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)){ if(info->tty->hw_stopped){ if(mdm_status & CyCTS){ /* !!! cy_start isn't used because... */ info->tty->hw_stopped = 0; base_addr[CySRER<tty->hw_stopped = 1; base_addr[CySRER<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", NULL)) { 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,NULL); } } /* 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(unsigned char *address) { unsigned long timeout; unsigned char *base_addr; int index; index = 0; /* IRQ probing is only for ISA */ base_addr = address; intr_base_addr = address; /* * Enable interrupts and see who answers */ cy_irq_triggered = 0; cli(); base_addr[CyCAR<= jiffies) { if (cy_irq_triggered) break; } probe_ready = 0; 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(unsigned char *address) { 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(); probe_ready = 0; 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(address); if (!irq_try_2) irq_try_2 = get_auto_irq(address); 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,index; 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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<default_timeout ? info->default_timeout : 0x02); /* 10ms rx timeout */ write_cy_cmd(base_addr,CyCHAN_CTL|CyENB_RCVR|CyENB_XMTR,index); base_addr[CyCAR<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,index; card = info->card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<flags & ASYNC_INITIALIZED)){ return; } card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<xmit_buf){ unsigned char * temp; temp = info->xmit_buf; info->xmit_buf = 0; free_page((unsigned long) temp); } base_addr[CyCAR<tty || (info->tty->termios->c_cflag & HUPCL)) { base_addr[CyMSVR1<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,index; 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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<tco; base_addr[CyTBPR<tbpr; base_addr[CyRCOR<rco; base_addr[CyRBPR<rbpr; /* set line characteristics according configuration */ base_addr[CySCHR1<tty); base_addr[CySCHR2<tty); base_addr[CyCOR1<cor1; base_addr[CyCOR2<cor2; base_addr[CyCOR3<cor3; base_addr[CyCOR4<cor4; base_addr[CyCOR5<cor5; write_cy_cmd(base_addr,CyCOR_CHANGE|CyCOR1ch|CyCOR2ch|CyCOR3ch,index); base_addr[CyCAR<default_timeout ? info->default_timeout : 0x02); /* 10ms rx timeout */ if (C_CLOCAL(info->tty)) { base_addr[CySRER<0 modem transitions */ base_addr[CyMCOR1<1 modem transitions */ base_addr[CyMCOR2<0 modem transitions */ base_addr[CyMCOR1<1 modem transitions */ base_addr[CyMCOR2<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,index; #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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<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,index; #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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<driver_data; unsigned long flags; unsigned char *base_addr; int card,chip,channel,index; #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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<card]; 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; 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,index; 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; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<card; channel = (info->line) - (cy_card[card].first_line); chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<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,index; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<cor3 &= ~CyREC_FIFO; info->cor3 |= value & CyREC_FIFO; base_addr[CyCOR3<cor3; write_cy_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index); return 0; } static int get_threshold(struct cyclades_port * info, unsigned long *value) { unsigned char *base_addr; int card,channel,chip,index; unsigned long tmp; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<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,index; card = info->card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<card; channel = info->line - cy_card[card].first_line; chip = channel>>2; channel &= 0x03; index = cy_card[card].bus_index; base_addr = (unsigned char*) (cy_card[card].base_addr + (cy_chip_offset[chip]<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: error = verify_area(VERIFY_READ, (void *) arg ,sizeof(unsigned long *)); if (error) { ret_val = error; break; } 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: error = verify_area(VERIFY_READ, (void *) arg ,sizeof(struct serial_struct)); if (error){ ret_val = error; break; } 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; unsigned long flags; #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 save_flags(flags); cli(); /* If the TTY is being hung up, nothing to do */ if (tty_hung_up_p(filp)) { MOD_DEC_USE_COUNT; restore_flags(flags); return; } 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(%d): decrementing count to %d\n", __LINE__, current->pid, info->count - 1); #endif if (--info->count < 0) { #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d: setting count to 0\n", __LINE__); #endif info->count = 0; } if (info->count) { MOD_DEC_USE_COUNT; restore_flags(flags); 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, 30*HZ); /* 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 (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 MOD_DEC_USE_COUNT; restore_flags(flags); 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); info->event = 0; info->count = 0; #ifdef SERIAL_DEBUG_COUNT printk("cyc: %d(%d): setting count to 0\n", __LINE__, current->pid); #endif info->tty = 0; 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,index; 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(%d): decrementing count to %d\n", __LINE__, current->pid, info->count); #endif info->blocked_open++; cinfo = &cy_card[info->card]; channel = info->line - cinfo->first_line; chip = channel>>2; channel &= 0x03; index = cinfo->bus_index; base_addr = (char *) (cinfo->base_addr + (cy_chip_offset[chip]<flags & ASYNC_CALLOUT_ACTIVE)){ base_addr[CyCAR<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<flags & ASYNC_CALLOUT_ACTIVE) && !(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || (base_addr[CyMSVR1<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(%d): incrementing count to %d\n", __LINE__, current->pid, 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; 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(%d): incrementing count to %d\n", __LINE__, current->pid, 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; } MOD_INC_USE_COUNT; 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,int index) { unsigned int chip_number; unsigned char* base_addr; true_base_addr[Cy_HwReset<first_line ; port < cinfo->first_line + 4*cinfo->num_chips ; port++) { info = &cy_port[port]; info->magic = CYCLADES_MAGIC; info->type = PORT_CIRRUS; info->card = board; info->line = port; 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 */ info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK | CyPARITY| CyFRAME| CyOVERRUN; /* info->timeout */ } } return 0; } /* cy_init */ #ifdef MODULE int init_module(void) { return(cy_init()); } void cleanup_module(void) { int i; if (tty_unregister_driver(&cy_callout_driver)) printk("Couldn't unregister Cyclom callout driver\n"); if (tty_unregister_driver(&cy_serial_driver)) printk("Couldn't unregister Cyclom serial driver\n"); for (i = 0; i < NR_CARDS; i++) { if (cy_card[i].base_addr != 0) { free_irq(cy_card[i].irq,NULL); } } } #endif /* * --------------------------------------------------------------------- * cy_detect_isa() - Probe for Cyclom-Y/ISA boards. * sets global variables and return the number of ISA boards found. * --------------------------------------------------------------------- */ int cy_detect_isa() { unsigned int cy_isa_irq,nboard; unsigned char *cy_isa_address; unsigned short i,j,cy_isa_nchan; nboard = 0; /* scan the address table probing for Cyclom-Y/ISA boards */ for (i = 0 ; i < NR_ISA_ADDRESSES ; i++) { cy_isa_address = cy_isa_addresses[i]; if (cy_isa_address == 0x0000) { return(nboard); } /* probe for CD1400... */ cy_isa_nchan = 4 * cy_init_card(cy_isa_address,0); if (cy_isa_nchan == 0) { continue; } /* find out the board's irq by probing */ cy_isa_irq = do_auto_irq(cy_isa_address); if (cy_isa_irq == 0) { printk("Cyclom-Y/ISA found at 0x%x but the IRQ could not be detected.\n", (unsigned int) cy_isa_address); continue; } if((cy_next_channel+cy_isa_nchan) > NR_PORTS) { printk("Cyclom-Y/ISA found at 0x%x but no more channel structures are available.\n", (unsigned int) cy_isa_address); return(nboard); } /* fill the next cy_card structure available */ for (j = 0 ; j < NR_CARDS ; j++) { if (cy_card[j].base_addr == 0) break; } if (j == NR_CARDS) { /* no more cy_cards available */ printk("Cyclom-Y/ISA found at 0x%x but no more card structures are available.\n", (unsigned int) cy_isa_address); return(nboard); } /* allocate IRQ */ if(request_irq(cy_isa_irq,cy_interrupt,SA_INTERRUPT,"cyclades",NULL)) { printk("Cyclom-Y/ISA found at 0x%x but could not allocate interrupt IRQ#%d.\n", (unsigned int) cy_isa_address,cy_isa_irq); return(nboard); } /* set cy_card */ cy_card[j].base_addr = (int) cy_isa_address; cy_card[j].irq = (int) cy_isa_irq; cy_card[j].bus_index = 0; cy_card[j].first_line = cy_next_channel; cy_card[j].num_chips = cy_isa_nchan/4; IRQ_cards[cy_isa_irq] = &cy_card[j]; nboard++; /* print message */ printk("Cyclom-Y/ISA #%d: 0x%x-0x%x, IRQ%d, %d channels starting from port %d.\n", j+1,(unsigned int) cy_isa_address, (unsigned int)(cy_isa_address + 0x1fff), cy_isa_irq,cy_isa_nchan,cy_next_channel); cy_next_channel += cy_isa_nchan; } return(nboard); } /* * --------------------------------------------------------------------- * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI. * sets global variables and return the number of PCI boards found. * --------------------------------------------------------------------- */ int cy_detect_pci() { #ifdef CONFIG_PCI unsigned char cyy_bus, cyy_dev_fn, cyy_rev_id; unsigned long pci_intr_ctrl; unsigned char cy_pci_irq; unsigned int cy_pci_address, cy_pci_io; unsigned short i,j,cy_pci_nchan; unsigned short device_id,dev_index = 0,board_index = 0; if(pcibios_present() == 0) { /* PCI bus not present */ return(0); } for (i = 0; i < NR_CARDS; i++) { /* look for a Cyclom-Y card by vendor and device id */ while((device_id = cy_pci_dev_id[dev_index]) != 0) { if(pcibios_find_device(PCI_VENDOR_ID_CYCLADES, device_id,board_index, &cyy_bus, &cyy_dev_fn) != 0) { dev_index++; /* try next device id */ board_index = 0; } else { board_index++; break; /* found a board */ } } if (device_id == 0) break; /* read PCI configuration area */ pcibios_read_config_byte(cyy_bus, cyy_dev_fn, PCI_INTERRUPT_LINE, &cy_pci_irq); pcibios_read_config_dword(cyy_bus, cyy_dev_fn, PCI_BASE_ADDRESS_1, &cy_pci_io); pcibios_read_config_dword(cyy_bus, cyy_dev_fn, PCI_BASE_ADDRESS_2, &cy_pci_address); pcibios_read_config_byte(cyy_bus, cyy_dev_fn, PCI_REVISION_ID, &cyy_rev_id); cy_pci_address &= 0xfffffff0; if ((ulong)cy_pci_address >= 0x100000) { /* above 1M? */ cy_pci_address = (unsigned int) vremap(cy_pci_address,0x4000); } cy_pci_io &= 0xfffffffc; cy_pci_nchan = 4 * cy_init_card((unsigned char *) cy_pci_address,1); if(cy_pci_nchan == 0) { printk("Cyclom-Y PCI host card with no Serial-Modules at 0x%x.\n", (unsigned int) cy_pci_address); continue; } if((cy_next_channel+cy_pci_nchan) > NR_PORTS) { printk("Cyclom-Y/PCI found at 0x%x but no more channel structures are available.\n", (unsigned int) cy_pci_address); return(i); } #ifdef CY_PCI_DEBUG printk("Cyclom-Ye/PCI #%d (bus=0x0%x, pci_id=0x%x, rev_id=%d).\n", i+1,cyy_bus,cyy_dev_fn,cyy_rev_id); printk("Cyclom-Ye/PCI: found at 0x%x, IRQ%d, ioaddr = 0x%lx.\n", cy_pci_address,(int)cy_pci_irq,cy_pci_io); #endif /* fill the next cy_card structure available */ for (j = 0 ; j < NR_CARDS ; j++) { if (cy_card[j].base_addr == 0) break; } if (j == NR_CARDS) { /* no more cy_cards available */ printk("Cyclom-Y/PCI found at 0x%x but no more card structures are available.\n", (unsigned int) cy_pci_address); return(i); } /* allocate IRQ */ if(request_irq(cy_pci_irq,cy_interrupt,SA_INTERRUPT,"cyclades",NULL)) { printk("Cyclom-Y/PCI found at 0x%x but could not allocate interrupt IRQ%d.\n", (unsigned int) cy_pci_address,cy_pci_irq); return(i); } /* set cy_card */ cy_card[j].base_addr = (int) cy_pci_address; cy_card[j].irq = (int) cy_pci_irq; cy_card[j].bus_index = 1; cy_card[j].first_line = cy_next_channel; cy_card[j].num_chips = cy_pci_nchan/4; IRQ_cards[cy_pci_irq] = &cy_card[j]; /* enable interrupts in the PCI interface */ outw(inw(cy_pci_io+0x68)|0x0900,cy_pci_io+0x68); pci_intr_ctrl = (unsigned long)(inw(cy_pci_io+0x68) | inw(cy_pci_io+0x6a)<<16); /* print message */ printk("Cyclom-Y/PCI #%d: 0x%x-0x%x, IRQ%d, %d channels starting from port %d.\n", j+1,(unsigned int) cy_pci_address, (unsigned int)(cy_pci_address + 0x3fff), (int)cy_pci_irq,cy_pci_nchan,cy_next_channel); cy_next_channel += cy_pci_nchan; } return(i); #else return(0); #endif /* ifdef CONFIG_PCI */ } #ifdef CYCLOM_SHOW_STATUS static void show_status(int line_num) { unsigned char *base_addr; int card,chip,channel,index; struct cyclades_port * info; unsigned long flags; info = &cy_port[line_num]; card = info->card; index = cy_card[card].bus_index; 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]<