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Diffstat (limited to 'drivers/char/cyclades.c')
| -rw-r--r-- | drivers/char/cyclades.c | 5424 |
1 files changed, 5424 insertions, 0 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c new file mode 100644 index 0000000..5e5b1dc --- /dev/null +++ b/drivers/char/cyclades.c @@ -0,0 +1,5424 @@ +#undef BLOCKMOVE +#define Z_WAKE +#undef Z_EXT_CHARS_IN_BUFFER + +/* + * linux/drivers/char/cyclades.c + * + * This file contains the driver for the Cyclades async multiport + * serial boards. + * + * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. + * Modified and maintained by Marcio Saito <marcio@cyclades.com>. + * + * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.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. + * Converted to pci probing and cleaned up by Jiri Slaby. + * + * This version supports shared IRQ's (only for PCI boards). + * + * Prevent users from opening non-existing Z ports. + * + * Revision 2.3.2.8 2000/07/06 18:14:16 ivan + * Fixed the PCI detection function to work properly on Alpha systems. + * Implemented support for TIOCSERGETLSR ioctl. + * Implemented full support for non-standard baud rates. + * + * Revision 2.3.2.7 2000/06/01 18:26:34 ivan + * Request PLX I/O region, although driver doesn't use it, to avoid + * problems with other drivers accessing it. + * Removed count for on-board buffer characters in cy_chars_in_buffer + * (Cyclades-Z only). + * + * Revision 2.3.2.6 2000/05/05 13:56:05 ivan + * Driver now reports physical instead of virtual memory addresses. + * Masks were added to some Cyclades-Z read accesses. + * Implemented workaround for PLX9050 bug that would cause a system lockup + * in certain systems, depending on the MMIO addresses allocated to the + * board. + * Changed the Tx interrupt programming in the CD1400 chips to boost up + * performance (Cyclom-Y only). + * Code is now compliant with the new module interface (module_[init|exit]). + * Make use of the PCI helper functions to access PCI resources. + * Did some code "housekeeping". + * + * Revision 2.3.2.5 2000/01/19 14:35:33 ivan + * Fixed bug in cy_set_termios on CRTSCTS flag turnoff. + * + * Revision 2.3.2.4 2000/01/17 09:19:40 ivan + * Fixed SMP locking in Cyclom-Y interrupt handler. + * + * Revision 2.3.2.3 1999/12/28 12:11:39 ivan + * Added a new cyclades_card field called nports to allow the driver to + * know the exact number of ports found by the Z firmware after its load; + * RX buffer contention prevention logic on interrupt op mode revisited + * (Cyclades-Z only); + * Revisited printk's for Z debug; + * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined; + * + * Revision 2.3.2.2 1999/10/01 11:27:43 ivan + * Fixed bug in cyz_poll that would make all ports but port 0 + * unable to transmit/receive data (Cyclades-Z only); + * Implemented logic to prevent the RX buffer from being stuck with data + * due to a driver / firmware race condition in interrupt op mode + * (Cyclades-Z only); + * Fixed bug in block_til_ready logic that would lead to a system crash; + * Revisited cy_close spinlock usage; + * + * Revision 2.3.2.1 1999/09/28 11:01:22 ivan + * Revisited CONFIG_PCI conditional compilation for PCI board support; + * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support; + * _Major_ cleanup on the Cyclades-Z interrupt support code / logic; + * Removed CTS handling from the driver -- this is now completely handled + * by the firmware (Cyclades-Z only); + * Flush RX on-board buffers on a port open (Cyclades-Z only); + * Fixed handling of ASYNC_SPD_* TTY flags; + * Module unload now unmaps all memory area allocated by ioremap; + * + * Revision 2.3.1.1 1999/07/15 16:45:53 ivan + * Removed CY_PROC conditional compilation; + * Implemented SMP-awareness for the driver; + * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] + * functions; + * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs + * (irq=NN) as parameters (only for ISA boards); + * Fixed bug in set_line_char that would prevent the Cyclades-Z + * ports from being configured at speeds above 115.2Kbps; + * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control + * switching from working properly; + * The driver now only prints IRQ info for the Cyclades-Z if it's + * configured to work in interrupt mode; + * + * Revision 2.2.2.3 1999/06/28 11:13:29 ivan + * Added support for interrupt mode operation for the Z cards; + * Removed the driver inactivity control for the Z; + * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when + * the Z firmware is not loaded yet; + * Replaced the "manual" Z Tx flush buffer by a call to a FW command of + * same functionality; + * Implemented workaround for IRQ setting loss on the PCI configuration + * registers after a PCI bridge EEPROM reload (affects PLX9060 only); + * + * Revision 2.2.2.2 1999/05/14 17:18:15 ivan + * /proc entry location changed to /proc/tty/driver/cyclades; + * Added support to shared IRQ's (only for PCI boards); + * Added support for Cobalt Qube2 systems; + * IRQ [de]allocation scheme revisited; + * BREAK implementation changed in order to make use of the 'break_ctl' + * TTY facility; + * Fixed typo in TTY structure field 'driver_name'; + * Included a PCI bridge reset and EEPROM reload in the board + * initialization code (for both Y and Z series). + * + * Revision 2.2.2.1 1999/04/08 16:17:43 ivan + * Fixed a bug in cy_wait_until_sent that was preventing the port to be + * closed properly after a SIGINT; + * Module usage counter scheme revisited; + * Added support to the upcoming Y PCI boards (i.e., support to additional + * PCI Device ID's). + * + * Revision 2.2.1.10 1999/01/20 16:14:29 ivan + * Removed all unnecessary page-alignement operations in ioremap calls + * (ioremap is currently safe for these operations). + * + * Revision 2.2.1.9 1998/12/30 18:18:30 ivan + * Changed access to PLX PCI bridge registers from I/O to MMIO, in + * order to make PLX9050-based boards work with certain motherboards. + * + * Revision 2.2.1.8 1998/11/13 12:46:20 ivan + * cy_close function now resets (correctly) the tty->closing flag; + * JIFFIES_DIFF macro fixed. + * + * Revision 2.2.1.7 1998/09/03 12:07:28 ivan + * Fixed bug in cy_close function, which was not informing HW of + * which port should have the reception disabled before doing so; + * fixed Cyclom-8YoP hardware detection bug. + * + * Revision 2.2.1.6 1998/08/20 17:15:39 ivan + * Fixed bug in cy_close function, which causes malfunction + * of one of the first 4 ports when a higher port is closed + * (Cyclom-Y only). + * + * Revision 2.2.1.5 1998/08/10 18:10:28 ivan + * Fixed Cyclom-4Yo hardware detection bug. + * + * Revision 2.2.1.4 1998/08/04 11:02:50 ivan + * /proc/cyclades implementation with great collaboration of + * Marc Lewis <marc@blarg.net>; + * cyy_interrupt was changed to avoid occurrence of kernel oopses + * during PPP operation. + * + * Revision 2.2.1.3 1998/06/01 12:09:10 ivan + * General code review in order to comply with 2.1 kernel standards; + * data loss prevention for slow devices revisited (cy_wait_until_sent + * was created); + * removed conditional compilation for new/old PCI structure support + * (now the driver only supports the new PCI structure). + * + * Revision 2.2.1.1 1998/03/19 16:43:12 ivan + * added conditional compilation for new/old PCI structure support; + * removed kernel series (2.0.x / 2.1.x) conditional compilation. + * + * Revision 2.1.1.3 1998/03/16 18:01:12 ivan + * cleaned up the data loss fix; + * fixed XON/XOFF handling once more (Cyclades-Z); + * general review of the driver routines; + * introduction of a mechanism to prevent data loss with slow + * printers, by forcing a delay before closing the port. + * + * Revision 2.1.1.2 1998/02/17 16:50:00 ivan + * fixed detection/handling of new CD1400 in Ye boards; + * fixed XON/XOFF handling (Cyclades-Z); + * fixed data loss caused by a premature port close; + * introduction of a flag that holds the CD1400 version ID per port + * (used by the CYGETCD1400VER new ioctl). + * + * Revision 2.1.1.1 1997/12/03 17:31:19 ivan + * Code review for the module cleanup routine; + * fixed RTS and DTR status report for new CD1400's in get_modem_info; + * includes anonymous changes regarding signal_pending. + * + * Revision 2.1 1997/11/01 17:42:41 ivan + * Changes in the driver to support Alpha systems (except 8Zo V_1); + * BREAK fix for the Cyclades-Z boards; + * driver inactivity control by FW implemented; + * introduction of flag that allows driver to take advantage of + * a special CD1400 feature related to HW flow control; + * added support for the CD1400 rev. J (Cyclom-Y boards); + * introduction of ioctls to: + * - control the rtsdtr_inv flag (Cyclom-Y); + * - control the rflow flag (Cyclom-Y); + * - adjust the polling interval (Cyclades-Z); + * + * Revision 1.36.4.33 1997/06/27 19:00:00 ivan + * Fixes related to kernel version conditional + * compilation. + * + * Revision 1.36.4.32 1997/06/14 19:30:00 ivan + * Compatibility issues between kernels 2.0.x and + * 2.1.x (mainly related to clear_bit function). + * + * Revision 1.36.4.31 1997/06/03 15:30:00 ivan + * Changes to define the memory window according to the + * board type. + * + * Revision 1.36.4.30 1997/05/16 15:30:00 daniel + * Changes to support new cycladesZ boards. + * + * Revision 1.36.4.29 1997/05/12 11:30:00 daniel + * Merge of Bentson's and Daniel's version 1.36.4.28. + * Corrects bug in cy_detect_pci: check if there are more + * ports than the number of static structs allocated. + * Warning message during initialization if this driver is + * used with the new generation of cycladesZ boards. Those + * will be supported only in next release of the driver. + * Corrects bug in cy_detect_pci and cy_detect_isa that + * returned wrong number of VALID boards, when a cyclomY + * was found with no serial modules connected. + * Changes to use current (2.1.x) kernel subroutine names + * and created macros for compilation with 2.0.x kernel, + * instead of the other way around. + * + * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson + * Change queue_task_irq_off to queue_task_irq. + * The inline function queue_task_irq_off (tqueue.h) + * was removed from latest releases of 2.1.x kernel. + * Use of macro __init to mark the initialization + * routines, so memory can be reused. + * Also incorporate implementation of critical region + * in function cleanup_module() created by anonymous + * linuxer. + * + * Revision 1.36.4.28 1997/04/25 16:00:00 daniel + * Change to support new firmware that solves DCD problem: + * application could fail to receive SIGHUP signal when DCD + * varying too fast. + * + * Revision 1.36.4.27 1997/03/26 10:30:00 daniel + * Changed for support linux versions 2.1.X. + * Backward compatible with linux versions 2.0.X. + * Corrected illegal use of filler field in + * CH_CTRL struct. + * Deleted some debug messages. + * + * Revision 1.36.4.26 1997/02/27 12:00:00 daniel + * Included check for NULL tty pointer in cyz_poll. + * + * Revision 1.36.4.25 1997/02/26 16:28:30 bentson + * Bill Foster at Blarg! Online services noticed that + * some of the switch elements of -Z modem control + * lacked a closing "break;" + * + * Revision 1.36.4.24 1997/02/24 11:00:00 daniel + * Changed low water threshold for buffer xmit_buf + * + * Revision 1.36.4.23 1996/12/02 21:50:16 bentson + * Marcio provided fix to modem status fetch for -Z + * + * Revision 1.36.4.22 1996/10/28 22:41:17 bentson + * improve mapping of -Z control page (thanks to Steve + * Price <stevep@fa.tdktca.com> for help on this) + * + * Revision 1.36.4.21 1996/09/10 17:00:10 bentson + * shift from CPU-bound to memcopy in cyz_polling operation + * + * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson + * Added support to set and report higher speeds. + * + * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito + * Some fixes in the HW flow control for the BETA release. + * Don't try to register the IRQ. + * + * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson + * make sure "cyc" appears in all kernel messages; all soft interrupts + * handled by same routine; recognize out-of-band reception; comment + * out some diagnostic messages; leave RTS/CTS flow control to hardware; + * fix race condition in -Z buffer management; only -Y needs to explicitly + * flush chars; tidy up some startup messages; + * + * Revision 1.36.4.18 1996/07/25 18:57:31 bentson + * shift MOD_INC_USE_COUNT location to match + * serial.c; purge some diagnostic messages; + * + * Revision 1.36.4.17 1996/07/25 18:01:08 bentson + * enable modem status messages and fetch & process them; note + * time of last activity type for each port; set_line_char now + * supports more than line 0 and treats 0 baud correctly; + * get_modem_info senses rs_status; + * + * Revision 1.36.4.16 1996/07/20 08:43:15 bentson + * barely works--now's time to turn on + * more features 'til it breaks + * + * Revision 1.36.4.15 1996/07/19 22:30:06 bentson + * check more -Z board status; shorten boot message + * + * Revision 1.36.4.14 1996/07/19 22:20:37 bentson + * fix reference to ch_ctrl in startup; verify return + * values from cyz_issue_cmd and cyz_update_channel; + * more stuff to get modem control correct; + * + * Revision 1.36.4.13 1996/07/11 19:53:33 bentson + * more -Z stuff folded in; re-order changes to put -Z stuff + * after -Y stuff (to make changes clearer) + * + * Revision 1.36.4.12 1996/07/11 15:40:55 bentson + * Add code to poll Cyclades-Z. Add code to get & set RS-232 control. + * Add code to send break. Clear firmware ID word at startup (so + * that other code won't talk to inactive board). + * + * Revision 1.36.4.11 1996/07/09 05:28:29 bentson + * add code for -Z in set_line_char + * + * Revision 1.36.4.10 1996/07/08 19:28:37 bentson + * fold more -Z stuff (or in some cases, error messages) + * into driver; add text to "don't know what to do" messages. + * + * Revision 1.36.4.9 1996/07/08 18:38:38 bentson + * moved compile-time flags near top of file; cosmetic changes + * to narrow text (to allow 2-up printing); changed many declarations + * to "static" to limit external symbols; shuffled code order to + * coalesce -Y and -Z specific code, also to put internal functions + * in order of tty_driver structure; added code to recognize -Z + * ports (and for moment, do nothing or report error); add cy_startup + * to parse boot command line for extra base addresses for ISA probes; + * + * Revision 1.36.4.8 1996/06/25 17:40:19 bentson + * reorder some code, fix types of some vars (int vs. long), + * add cy_setup to support user declared ISA addresses + * + * Revision 1.36.4.7 1996/06/21 23:06:18 bentson + * dump ioctl based firmware load (it's now a user level + * program); ensure uninitialzed ports cannot be used + * + * Revision 1.36.4.6 1996/06/20 23:17:19 bentson + * rename vars and restructure some code + * + * Revision 1.36.4.5 1996/06/14 15:09:44 bentson + * get right status back after boot load + * + * Revision 1.36.4.4 1996/06/13 19:51:44 bentson + * successfully loads firmware + * + * Revision 1.36.4.3 1996/06/13 06:08:33 bentson + * add more of the code for the boot/load ioctls + * + * Revision 1.36.4.2 1996/06/11 21:00:51 bentson + * start to add Z functionality--starting with ioctl + * for loading firmware + * + * Revision 1.36.4.1 1996/06/10 18:03:02 bentson + * added code to recognize Z/PCI card at initialization; report + * presence, but card is not initialized (because firmware needs + * to be loaded) + * + * 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 <heiko@colossus.escape.de> + * + * Revision 1.36.3.7 1996/04/19 21:06:18 bentson + * remove unneeded boot message & fix CLOCAL hardware flow + * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>); + * 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 <minyard@wf-rch.cirr.com> 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 <alan@ez0.ezlink.com> to remove a + * possible race condition. + * Change by Marcio Saito <marcio@cyclades.com> 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 + * <duncan@okay.com>. "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 <mec@jobe.shell.portal.com>); + * + * 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 <lambert@chesapeake.rps.slb.com>); + * + * 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 <baron@aa.net>); + * give better error response if open is attempted on non-existent port + * (Zachariah Vaum <jchryslr@netcom.com>); + * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>); + * 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 <faith@cs.unc.edu> Nick Simicich + * <njs@scifi.emi.net>); + * + * 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 + * + */ + +#define CY_VERSION "2.5" + +/* If you need to install more boards than NR_CARDS, change the constant + in the definition below. No other change is necessary to support up to + eight boards. Beyond that you'll have to extend cy_isa_addresses. */ + +#define NR_CARDS 4 + +/* + If the total number of ports is larger than NR_PORTS, change this + constant in the definition below. No other change is necessary to + support more boards/ports. */ + +#define NR_PORTS 256 + +#define ZE_V1_NPORTS 64 +#define ZO_V1 0 +#define ZO_V2 1 +#define ZE_V1 2 + +#define SERIAL_PARANOIA_CHECK +#undef CY_DEBUG_OPEN +#undef CY_DEBUG_THROTTLE +#undef CY_DEBUG_OTHER +#undef CY_DEBUG_IO +#undef CY_DEBUG_COUNT +#undef CY_DEBUG_DTR +#undef CY_DEBUG_WAIT_UNTIL_SENT +#undef CY_DEBUG_INTERRUPTS +#undef CY_16Y_HACK +#undef CY_ENABLE_MONITORING +#undef CY_PCI_DEBUG + +/* + * Include section + */ +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/fcntl.h> +#include <linux/ptrace.h> +#include <linux/cyclades.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/spinlock.h> +#include <linux/bitops.h> +#include <linux/firmware.h> + +#include <asm/system.h> +#include <linux/io.h> +#include <asm/irq.h> +#include <linux/uaccess.h> + +#include <linux/kernel.h> +#include <linux/pci.h> + +#include <linux/stat.h> +#include <linux/proc_fs.h> + +static void cy_throttle(struct tty_struct *tty); +static void cy_send_xchar(struct tty_struct *tty, char ch); + +#define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1) + +#define Z_FPGA_CHECK(card) \ + ((readl(&((struct RUNTIME_9060 __iomem *) \ + ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0) + +#define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \ + ((card).ctl_addr))->mail_box_0)) || \ + Z_FPGA_CHECK(card)) && \ + (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \ + ((card).base_addr+ID_ADDRESS))->signature))) + +#ifndef SERIAL_XMIT_SIZE +#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) +#endif +#define WAKEUP_CHARS 256 + +#define STD_COM_FLAGS (0) + +/* firmware stuff */ +#define ZL_MAX_BLOCKS 16 +#define DRIVER_VERSION 0x02010203 +#define RAM_SIZE 0x80000 + +#define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0) + +enum zblock_type { + ZBLOCK_PRG = 0, + ZBLOCK_FPGA = 1 +}; + +struct zfile_header { + char name[64]; + char date[32]; + char aux[32]; + u32 n_config; + u32 config_offset; + u32 n_blocks; + u32 block_offset; + u32 reserved[9]; +} __attribute__ ((packed)); + +struct zfile_config { + char name[64]; + u32 mailbox; + u32 function; + u32 n_blocks; + u32 block_list[ZL_MAX_BLOCKS]; +} __attribute__ ((packed)); + +struct zfile_block { + u32 type; + u32 file_offset; + u32 ram_offset; + u32 size; +} __attribute__ ((packed)); + +static struct tty_driver *cy_serial_driver; + +#ifdef CONFIG_ISA +/* This is the address lookup table. The driver will probe for + Cyclom-Y/ISA boards at all addresses in here. If you want the + driver to probe addresses at a different address, add it to + this table. If the driver is probing some other board and + causing problems, remove the offending address from this table. +*/ + +static unsigned int cy_isa_addresses[] = { + 0xD0000, + 0xD2000, + 0xD4000, + 0xD6000, + 0xD8000, + 0xDA000, + 0xDC000, + 0xDE000, + 0, 0, 0, 0, 0, 0, 0, 0 +}; + +#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) + +#ifdef MODULE +static long maddr[NR_CARDS]; +static int irq[NR_CARDS]; + +module_param_array(maddr, long, NULL, 0); +module_param_array(irq, int, NULL, 0); +#endif + +#endif /* CONFIG_ISA */ + +/* This is the per-card data structure containing address, irq, number of + channels, etc. This driver supports a maximum of NR_CARDS cards. +*/ +static struct cyclades_card cy_card[NR_CARDS]; + +static int cy_next_channel; /* next minor available */ + +/* + * This is used to look up the divisor speeds and the timeouts + * We're normally limited to 15 distinct baud rates. The extra + * are accessed via settings in info->port.flags. + * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, + * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, + * HI VHI + * 20 + */ +static int baud_table[] = { + 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, + 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, + 230400, 0 +}; + +static char baud_co_25[] = { /* 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[] = { /* 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_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ + /* value => 00 01 02 03 04 */ + /* divide by 8 32 128 512 2048 */ + 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, + 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00 +}; + +static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ + 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, + 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, + 0x21 +}; + +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, + 0x07 +}; + +/* + * The Cyclades driver implements HW flow control as any serial driver. + * The cyclades_port structure member rflow and the vector rflow_thr + * allows us to take advantage of a special feature in the CD1400 to avoid + * data loss even when the system interrupt latency is too high. These flags + * are to be used only with very special applications. Setting these flags + * requires the use of a special cable (DTR and RTS reversed). In the new + * CD1400-based boards (rev. 6.00 or later), there is no need for special + * cables. + */ + +static char rflow_thr[] = { /* rflow threshold */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, + 0x0a +}; + +/* The Cyclom-Ye has placed the sequential chips in non-sequential + * address order. This look-up table overcomes that problem. + */ +static int cy_chip_offset[] = { 0x0000, + 0x0400, + 0x0800, + 0x0C00, + 0x0200, + 0x0600, + 0x0A00, + 0x0E00 +}; + +/* PCI related definitions */ + +#ifdef CONFIG_PCI +static struct pci_device_id cy_pci_dev_id[] __devinitdata = { + /* PCI < 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, + /* PCI > 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, + /* 4Y PCI < 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, + /* 4Y PCI > 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, + /* 8Y PCI < 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, + /* 8Y PCI > 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, + /* Z PCI < 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, + /* Z PCI > 1Mb */ + { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, + { } /* end of table */ +}; +MODULE_DEVICE_TABLE(pci, cy_pci_dev_id); +#endif + +static void cy_start(struct tty_struct *); +static void set_line_char(struct cyclades_port *); +static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32); +#ifdef CONFIG_ISA +static unsigned detect_isa_irq(void __iomem *); +#endif /* CONFIG_ISA */ + +static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *); + +#ifndef CONFIG_CYZ_INTR +static void cyz_poll(unsigned long); + +/* The Cyclades-Z polling cycle is defined by this variable */ +static long cyz_polling_cycle = CZ_DEF_POLL; + +static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); + +#else /* CONFIG_CYZ_INTR */ +static void cyz_rx_restart(unsigned long); +static struct timer_list cyz_rx_full_timer[NR_PORTS]; +#endif /* CONFIG_CYZ_INTR */ + +static inline int serial_paranoia_check(struct cyclades_port *info, + char *name, const char *routine) +{ +#ifdef SERIAL_PARANOIA_CHECK + if (!info) { + printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) " + "in %s\n", name, routine); + return 1; + } + + if (info->magic != CYCLADES_MAGIC) { + printk(KERN_WARNING "cyc Warning: bad magic number for serial " + "struct (%s) in %s\n", name, routine); + return 1; + } +#endif + return 0; +} /* serial_paranoia_check */ + +/***********************************************************/ +/********* Start of block of Cyclom-Y specific code ********/ + +/* 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. + + This function is only called from inside spinlock-protected code. + */ +static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index) +{ + unsigned int i; + + /* Check to see that the previous command has completed */ + for (i = 0; i < 100; i++) { + if (readb(base_addr + (CyCCR << index)) == 0) + break; + udelay(10L); + } + /* if the CCR never cleared, the previous command + didn't finish within the "reasonable time" */ + if (i == 100) + return -1; + + /* Issue the new command */ + cy_writeb(base_addr + (CyCCR << index), cmd); + + return 0; +} /* cyy_issue_cmd */ + +#ifdef CONFIG_ISA +/* ISA interrupt detection code */ +static unsigned detect_isa_irq(void __iomem *address) +{ + int irq; + unsigned long irqs, flags; + int save_xir, save_car; + int index = 0; /* IRQ probing is only for ISA */ + + /* forget possible initially masked and pending IRQ */ + irq = probe_irq_off(probe_irq_on()); + + /* Clear interrupts on the board first */ + cy_writeb(address + (Cy_ClrIntr << index), 0); + /* Cy_ClrIntr is 0x1800 */ + + irqs = probe_irq_on(); + /* Wait ... */ + udelay(5000L); + + /* Enable the Tx interrupts on the CD1400 */ + local_irq_save(flags); + cy_writeb(address + (CyCAR << index), 0); + cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); + + cy_writeb(address + (CyCAR << index), 0); + cy_writeb(address + (CySRER << index), + readb(address + (CySRER << index)) | CyTxRdy); + local_irq_restore(flags); + + /* Wait ... */ + udelay(5000L); + + /* Check which interrupt is in use */ + irq = probe_irq_off(irqs); + + /* Clean up */ + save_xir = (u_char) readb(address + (CyTIR << index)); + save_car = readb(address + (CyCAR << index)); + cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); + cy_writeb(address + (CySRER << index), + readb(address + (CySRER << index)) & ~CyTxRdy); + cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); + cy_writeb(address + (CyCAR << index), (save_car)); + cy_writeb(address + (Cy_ClrIntr << index), 0); + /* Cy_ClrIntr is 0x1800 */ + + return (irq > 0) ? irq : 0; +} +#endif /* CONFIG_ISA */ + +static void cyy_chip_rx(struct cyclades_card *cinfo, int chip, + void __iomem *base_addr) +{ + struct cyclades_port *info; + struct tty_struct *tty; + int len, index = cinfo->bus_index; + u8 save_xir, channel, save_car, data, char_count; + +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip); +#endif + /* determine the channel & change to that context */ + save_xir = readb(base_addr + (CyRIR << index)); + channel = save_xir & CyIRChannel; + info = &cinfo->ports[channel + chip * 4]; + save_car = readb(base_addr + (CyCAR << index)); + cy_writeb(base_addr + (CyCAR << index), save_xir); + + /* if there is nowhere to put the data, discard it */ + if (info->port.tty == NULL) { + if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == + CyIVRRxEx) { /* exception */ + data = readb(base_addr + (CyRDSR << index)); + } else { /* normal character reception */ + char_count = readb(base_addr + (CyRDCR << index)); + while (char_count--) + data = readb(base_addr + (CyRDSR << index)); + } + goto end; + } + /* there is an open port for this data */ + tty = info->port.tty; + if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == + CyIVRRxEx) { /* exception */ + data = readb(base_addr + (CyRDSR << index)); + + /* For statistics only */ + if (data & CyBREAK) + info->icount.brk++; + else if (data & CyFRAME) + info->icount.frame++; + else if (data & CyPARITY) + info->icount.parity++; + else if (data & CyOVERRUN) + info->icount.overrun++; + + if (data & info->ignore_status_mask) { + info->icount.rx++; + return; + } + if (tty_buffer_request_room(tty, 1)) { + if (data & info->read_status_mask) { + if (data & CyBREAK) { + tty_insert_flip_char(tty, + readb(base_addr + (CyRDSR << + index)), TTY_BREAK); + info->icount.rx++; + if (info->port.flags & ASYNC_SAK) + do_SAK(tty); + } else if (data & CyFRAME) { + tty_insert_flip_char(tty, + readb(base_addr + (CyRDSR << + index)), TTY_FRAME); + info->icount.rx++; + info->idle_stats.frame_errs++; + } else if (data & CyPARITY) { + /* Pieces of seven... */ + tty_insert_flip_char(tty, + readb(base_addr + (CyRDSR << + index)), TTY_PARITY); + info->icount.rx++; + info->idle_stats.parity_errs++; + } else if (data & CyOVERRUN) { + tty_insert_flip_char(tty, 0, + TTY_OVERRUN); + info->icount.rx++; + /* If the flip buffer itself is + overflowing, we still lose + the next incoming character. + */ + tty_insert_flip_char(tty, + readb(base_addr + (CyRDSR << + index)), TTY_FRAME); + info->icount.rx++; + info->idle_stats.overruns++; + /* These two conditions may imply */ + /* a normal read should be done. */ + /* } else if(data & CyTIMEOUT) { */ + /* } else if(data & CySPECHAR) { */ + } else { + tty_insert_flip_char(tty, 0, + TTY_NORMAL); + info->icount.rx++; + } + } else { + tty_insert_flip_char(tty, 0, TTY_NORMAL); + info->icount.rx++; + } + } else { + /* there was a software buffer overrun and nothing + * could be done about it!!! */ + info->icount.buf_overrun++; + info->idle_stats.overruns++; + } + } else { /* normal character reception */ + /* load # chars available from the chip */ + char_count = readb(base_addr + (CyRDCR << index)); + +#ifdef CY_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 + len = tty_buffer_request_room(tty, char_count); + while (len--) { + data = readb(base_addr + (CyRDSR << index)); + tty_insert_flip_char(tty, data, TTY_NORMAL); + info->idle_stats.recv_bytes++; + info->icount.rx++; +#ifdef CY_16Y_HACK + udelay(10L); +#endif + } + info->idle_stats.recv_idle = jiffies; + } + tty_schedule_flip(tty); +end: + /* end of service */ + cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f); + cy_writeb(base_addr + (CyCAR << index), save_car); +} + +static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip, + void __iomem *base_addr) +{ + struct cyclades_port *info; + int char_count, index = cinfo->bus_index; + u8 save_xir, channel, save_car, outch; + + /* Since we only get here when the transmit buffer + is empty, we know we can always stuff a dozen + characters. */ +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip); +#endif + + /* determine the channel & change to that context */ + save_xir = readb(base_addr + (CyTIR << index)); + channel = save_xir & CyIRChannel; + save_car = readb(base_addr + (CyCAR << index)); + cy_writeb(base_addr + (CyCAR << index), save_xir); + + /* validate the port# (as configured and open) */ + if (channel + chip * 4 >= cinfo->nports) { + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & ~CyTxRdy); + goto end; + } + info = &cinfo->ports[channel + chip * 4]; + if (info->port.tty == NULL) { + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & ~CyTxRdy); + goto end; + } + + /* load the on-chip space for outbound data */ + char_count = info->xmit_fifo_size; + + if (info->x_char) { /* send special char */ + outch = info->x_char; + cy_writeb(base_addr + (CyTDR << index), outch); + char_count--; + info->icount.tx++; + info->x_char = 0; + } + + if (info->breakon || info->breakoff) { + if (info->breakon) { + cy_writeb(base_addr + (CyTDR << index), 0); + cy_writeb(base_addr + (CyTDR << index), 0x81); + info->breakon = 0; + char_count -= 2; + } + if (info->breakoff) { + cy_writeb(base_addr + (CyTDR << index), 0); + cy_writeb(base_addr + (CyTDR << index), 0x83); + info->breakoff = 0; + char_count -= 2; + } + } + + while (char_count-- > 0) { + if (!info->xmit_cnt) { + if (readb(base_addr + (CySRER << index)) & CyTxMpty) { + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & + ~CyTxMpty); + } else { + cy_writeb(base_addr + (CySRER << index), + (readb(base_addr + (CySRER << index)) & + ~CyTxRdy) | CyTxMpty); + } + goto done; + } + if (info->port.xmit_buf == NULL) { + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & + ~CyTxRdy); + goto done; + } + if (info->port.tty->stopped || info->port.tty->hw_stopped) { + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & + ~CyTxRdy); + goto done; + } + /* 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->port.xmit_buf[info->xmit_tail]; + if (outch) { + info->xmit_cnt--; + info->xmit_tail = (info->xmit_tail + 1) & + (SERIAL_XMIT_SIZE - 1); + cy_writeb(base_addr + (CyTDR << index), outch); + info->icount.tx++; + } else { + if (char_count > 1) { + info->xmit_cnt--; + info->xmit_tail = (info->xmit_tail + 1) & + (SERIAL_XMIT_SIZE - 1); + cy_writeb(base_addr + (CyTDR << index), outch); + cy_writeb(base_addr + (CyTDR << index), 0); + info->icount.tx++; + char_count--; + } + } + } + +done: + tty_wakeup(info->port.tty); +end: + /* end of service */ + cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f); + cy_writeb(base_addr + (CyCAR << index), save_car); +} + +static void cyy_chip_modem(struct cyclades_card *cinfo, int chip, + void __iomem *base_addr) +{ + struct cyclades_port *info; + int index = cinfo->bus_index; + u8 save_xir, channel, save_car, mdm_change, mdm_status; + + /* determine the channel & change to that context */ + save_xir = readb(base_addr + (CyMIR << index)); + channel = save_xir & CyIRChannel; + info = &cinfo->ports[channel + chip * 4]; + save_car = readb(base_addr + (CyCAR << index)); + cy_writeb(base_addr + (CyCAR << index), save_xir); + + mdm_change = readb(base_addr + (CyMISR << index)); + mdm_status = readb(base_addr + (CyMSVR1 << index)); + + if (!info->port.tty) + goto end; + + if (mdm_change & CyANY_DELTA) { + /* For statistics only */ + if (mdm_change & CyDCD) + info->icount.dcd++; + if (mdm_change & CyCTS) + info->icount.cts++; + if (mdm_change & CyDSR) + info->icount.dsr++; + if (mdm_change & CyRI) + info->icount.rng++; + + wake_up_interruptible(&info->delta_msr_wait); + } + + if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) { + if (!(mdm_status & CyDCD)) { + tty_hangup(info->port.tty); + info->port.flags &= ~ASYNC_NORMAL_ACTIVE; + } + wake_up_interruptible(&info->port.open_wait); + } + if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) { + if (info->port.tty->hw_stopped) { + if (mdm_status & CyCTS) { + /* cy_start isn't used + because... !!! */ + info->port.tty->hw_stopped = 0; + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) | + CyTxRdy); + tty_wakeup(info->port.tty); + } + } else { + if (!(mdm_status & CyCTS)) { + /* cy_stop isn't used + because ... !!! */ + info->port.tty->hw_stopped = 1; + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & + ~CyTxRdy); + } + } + } +/* if (mdm_change & CyDSR) { + } + if (mdm_change & CyRI) { + }*/ +end: + /* end of service */ + cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f); + cy_writeb(base_addr + (CyCAR << index), save_car); +} + +/* The real interrupt service routine is called + whenever the card wants its hand held--chars + received, out buffer empty, modem change, etc. + */ +static irqreturn_t cyy_interrupt(int irq, void *dev_id) +{ + int status; + struct cyclades_card *cinfo = dev_id; + void __iomem *base_addr, *card_base_addr; + unsigned int chip, too_many, had_work; + int index; + + if (unlikely(cinfo == NULL)) { +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n", + irq); +#endif + return IRQ_NONE; /* spurious interrupt */ + } + + card_base_addr = cinfo->base_addr; + index = cinfo->bus_index; + + /* card was not initialized yet (e.g. DEBUG_SHIRQ) */ + if (unlikely(card_base_addr == NULL)) + return IRQ_HANDLED; + + /* 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 = cinfo->base_addr + + (cy_chip_offset[chip] << index); + too_many = 0; + while ((status = readb(base_addr + + (CySVRR << index))) != 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 (1000 < too_many++) + break; + spin_lock(&cinfo->card_lock); + if (status & CySRReceive) /* rx intr */ + cyy_chip_rx(cinfo, chip, base_addr); + if (status & CySRTransmit) /* tx intr */ + cyy_chip_tx(cinfo, chip, base_addr); + if (status & CySRModem) /* modem intr */ + cyy_chip_modem(cinfo, chip, base_addr); + spin_unlock(&cinfo->card_lock); + } + } + } while (had_work); + + /* clear interrupts */ + spin_lock(&cinfo->card_lock); + cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); + /* Cy_ClrIntr is 0x1800 */ + spin_unlock(&cinfo->card_lock); + return IRQ_HANDLED; +} /* cyy_interrupt */ + +/***********************************************************/ +/********* End of block of Cyclom-Y specific code **********/ +/******** Start of block of Cyclades-Z specific code *******/ +/***********************************************************/ + +static int +cyz_fetch_msg(struct cyclades_card *cinfo, + __u32 *channel, __u8 *cmd, __u32 *param) +{ + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + unsigned long loc_doorbell; + + firm_id = cinfo->base_addr + ID_ADDRESS; + if (!ISZLOADED(*cinfo)) + return -1; + zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + + loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *) + (cinfo->ctl_addr))->loc_doorbell); + if (loc_doorbell) { + *cmd = (char)(0xff & loc_doorbell); + *channel = readl(&board_ctrl->fwcmd_channel); + *param = (__u32) readl(&board_ctrl->fwcmd_param); + cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> + loc_doorbell, 0xffffffff); + return 1; + } + return 0; +} /* cyz_fetch_msg */ + +static int +cyz_issue_cmd(struct cyclades_card *cinfo, + __u32 channel, __u8 cmd, __u32 param) +{ + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + __u32 __iomem *pci_doorbell; + unsigned int index; + + firm_id = cinfo->base_addr + ID_ADDRESS; + if (!ISZLOADED(*cinfo)) + return -1; + + zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + + index = 0; + pci_doorbell = + &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell; + while ((readl(pci_doorbell) & 0xff) != 0) { + if (index++ == 1000) + return (int)(readl(pci_doorbell) & 0xff); + udelay(50L); + } + cy_writel(&board_ctrl->hcmd_channel, channel); + cy_writel(&board_ctrl->hcmd_param, param); + cy_writel(pci_doorbell, (long)cmd); + + return 0; +} /* cyz_issue_cmd */ + +static void cyz_handle_rx(struct cyclades_port *info, + struct BUF_CTRL __iomem *buf_ctrl) +{ + struct cyclades_card *cinfo = info->card; + struct tty_struct *tty = info->port.tty; + unsigned int char_count; + int len; +#ifdef BLOCKMOVE + unsigned char *buf; +#else + char data; +#endif + __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; + + rx_get = new_rx_get = readl(&buf_ctrl->rx_get); + rx_put = readl(&buf_ctrl->rx_put); + rx_bufsize = readl(&buf_ctrl->rx_bufsize); + rx_bufaddr = readl(&buf_ctrl->rx_bufaddr); + if (rx_put >= rx_get) + char_count = rx_put - rx_get; + else + char_count = rx_put - rx_get + rx_bufsize; + + if (char_count) { +#ifdef CY_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 + if (tty == NULL) { + /* flush received characters */ + new_rx_get = (new_rx_get + char_count) & + (rx_bufsize - 1); + info->rflush_count++; + } else { +#ifdef BLOCKMOVE + /* we'd like to use memcpy(t, f, n) and memset(s, c, count) + for performance, but because of buffer boundaries, there + may be several steps to the operation */ + while (1) { + len = tty_prepare_flip_string(tty, &buf, + char_count); + if (!len) + break; + + len = min_t(unsigned int, min(len, char_count), + rx_bufsize - new_rx_get); + + memcpy_fromio(buf, cinfo->base_addr + + rx_bufaddr + new_rx_get, len); + + new_rx_get = (new_rx_get + len) & + (rx_bufsize - 1); + char_count -= len; + info->icount.rx += len; + info->idle_stats.recv_bytes += len; + } +#else + len = tty_buffer_request_room(tty, char_count); + while (len--) { + data = readb(cinfo->base_addr + rx_bufaddr + + new_rx_get); + new_rx_get = (new_rx_get + 1) & + (rx_bufsize - 1); + tty_insert_flip_char(tty, data, TTY_NORMAL); + info->idle_stats.recv_bytes++; + info->icount.rx++; + } +#endif +#ifdef CONFIG_CYZ_INTR + /* Recalculate the number of chars in the RX buffer and issue + a cmd in case it's higher than the RX high water mark */ + rx_put = readl(&buf_ctrl->rx_put); + if (rx_put >= rx_get) + char_count = rx_put - rx_get; + else + char_count = rx_put - rx_get + rx_bufsize; + if (char_count >= readl(&buf_ctrl->rx_threshold) && + !timer_pending(&cyz_rx_full_timer[ + info->line])) + mod_timer(&cyz_rx_full_timer[info->line], + jiffies + 1); +#endif + info->idle_stats.recv_idle = jiffies; + tty_schedule_flip(tty); + } + /* Update rx_get */ + cy_writel(&buf_ctrl->rx_get, new_rx_get); + } +} + +static void cyz_handle_tx(struct cyclades_port *info, + struct BUF_CTRL __iomem *buf_ctrl) +{ + struct cyclades_card *cinfo = info->card; + struct tty_struct *tty = info->port.tty; + u8 data; + unsigned int char_count; +#ifdef BLOCKMOVE + int small_count; +#endif + __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr; + + if (info->xmit_cnt <= 0) /* Nothing to transmit */ + return; + + tx_get = readl(&buf_ctrl->tx_get); + tx_put = readl(&buf_ctrl->tx_put); + tx_bufsize = readl(&buf_ctrl->tx_bufsize); + tx_bufaddr = readl(&buf_ctrl->tx_bufaddr); + if (tx_put >= tx_get) + char_count = tx_get - tx_put - 1 + tx_bufsize; + else + char_count = tx_get - tx_put - 1; + + if (char_count) { + + if (tty == NULL) + goto ztxdone; + + if (info->x_char) { /* send special char */ + data = info->x_char; + + cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); + tx_put = (tx_put + 1) & (tx_bufsize - 1); + info->x_char = 0; + char_count--; + info->icount.tx++; + } +#ifdef BLOCKMOVE + while (0 < (small_count = min_t(unsigned int, + tx_bufsize - tx_put, min_t(unsigned int, + (SERIAL_XMIT_SIZE - info->xmit_tail), + min_t(unsigned int, info->xmit_cnt, + char_count))))) { + + memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + + tx_put), + &info->port.xmit_buf[info->xmit_tail], + small_count); + + tx_put = (tx_put + small_count) & (tx_bufsize - 1); + char_count -= small_count; + info->icount.tx += small_count; + info->xmit_cnt -= small_count; + info->xmit_tail = (info->xmit_tail + small_count) & + (SERIAL_XMIT_SIZE - 1); + } +#else + while (info->xmit_cnt && char_count) { + data = info->port.xmit_buf[info->xmit_tail]; + info->xmit_cnt--; + info->xmit_tail = (info->xmit_tail + 1) & + (SERIAL_XMIT_SIZE - 1); + + cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); + tx_put = (tx_put + 1) & (tx_bufsize - 1); + char_count--; + info->icount.tx++; + } +#endif + tty_wakeup(tty); +ztxdone: + /* Update tx_put */ + cy_writel(&buf_ctrl->tx_put, tx_put); + } +} + +static void cyz_handle_cmd(struct cyclades_card *cinfo) +{ + struct tty_struct *tty; + struct cyclades_port *info; + static struct FIRM_ID __iomem *firm_id; + static struct ZFW_CTRL __iomem *zfw_ctrl; + static struct BOARD_CTRL __iomem *board_ctrl; + static struct CH_CTRL __iomem *ch_ctrl; + static struct BUF_CTRL __iomem *buf_ctrl; + __u32 channel; + __u8 cmd; + __u32 param; + __u32 hw_ver, fw_ver; + int special_count; + int delta_count; + + firm_id = cinfo->base_addr + ID_ADDRESS; + zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + fw_ver = readl(&board_ctrl->fw_version); + hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> + mail_box_0); + + while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { + special_count = 0; + delta_count = 0; + info = &cinfo->ports[channel]; + tty = info->port.tty; + if (tty == NULL) + continue; + + ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); + buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); + + switch (cmd) { + case C_CM_PR_ERROR: + tty_insert_flip_char(tty, 0, TTY_PARITY); + info->icount.rx++; + special_count++; + break; + case C_CM_FR_ERROR: + tty_insert_flip_char(tty, 0, TTY_FRAME); + info->icount.rx++; + special_count++; + break; + case C_CM_RXBRK: + tty_insert_flip_char(tty, 0, TTY_BREAK); + info->icount.rx++; + special_count++; + break; + case C_CM_MDCD: + info->icount.dcd++; + delta_count++; + if (info->port.flags & ASYNC_CHECK_CD) { + if ((fw_ver > 241 ? ((u_long) param) : + readl(&ch_ctrl->rs_status)) & + C_RS_DCD) { + wake_up_interruptible(&info->port.open_wait); + } else { + tty_hangup(info->port.tty); + wake_up_interruptible(&info->port.open_wait); + info->port.flags &= ~ASYNC_NORMAL_ACTIVE; + } + } + break; + case C_CM_MCTS: + info->icount.cts++; + delta_count++; + break; + case C_CM_MRI: + info->icount.rng++; + delta_count++; + break; + case C_CM_MDSR: + info->icount.dsr++; + delta_count++; + break; +#ifdef Z_WAKE + case C_CM_IOCTLW: + complete(&info->shutdown_wait); + break; +#endif +#ifdef CONFIG_CYZ_INTR + case C_CM_RXHIWM: + case C_CM_RXNNDT: + case C_CM_INTBACK2: + /* Reception Interrupt */ +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, " + "port %ld\n", info->card, channel); +#endif + cyz_handle_rx(info, buf_ctrl); + break; + case C_CM_TXBEMPTY: + case C_CM_TXLOWWM: + case C_CM_INTBACK: + /* Transmission Interrupt */ +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, " + "port %ld\n", info->card, channel); +#endif + cyz_handle_tx(info, buf_ctrl); + break; +#endif /* CONFIG_CYZ_INTR */ + case C_CM_FATAL: + /* should do something with this !!! */ + break; + default: + break; + } + if (delta_count) + wake_up_interruptible(&info->delta_msr_wait); + if (special_count) + tty_schedule_flip(tty); + } +} + +#ifdef CONFIG_CYZ_INTR +static irqreturn_t cyz_interrupt(int irq, void *dev_id) +{ + struct cyclades_card *cinfo = dev_id; + + if (unlikely(cinfo == NULL)) { +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n", + irq); +#endif + return IRQ_NONE; /* spurious interrupt */ + } + + if (unlikely(!ISZLOADED(*cinfo))) { +#ifdef CY_DEBUG_INTERRUPTS + printk(KERN_DEBUG "cyz_interrupt: board not yet loaded " + "(IRQ%d).\n", irq); +#endif + return IRQ_NONE; + } + + /* Handle the interrupts */ + cyz_handle_cmd(cinfo); + + return IRQ_HANDLED; +} /* cyz_interrupt */ + +static void cyz_rx_restart(unsigned long arg) +{ + struct cyclades_port *info = (struct cyclades_port *)arg; + struct cyclades_card *card = info->card; + int retval; + __u32 channel = info->line - card->first_line; + unsigned long flags; + + spin_lock_irqsave(&card->card_lock, flags); + retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n", + info->line, retval); + } + spin_unlock_irqrestore(&card->card_lock, flags); +} + +#else /* CONFIG_CYZ_INTR */ + +static void cyz_poll(unsigned long arg) +{ + struct cyclades_card *cinfo; + struct cyclades_port *info; + struct tty_struct *tty; + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct BUF_CTRL __iomem *buf_ctrl; + unsigned long expires = jiffies + HZ; + unsigned int port, card; + + for (card = 0; card < NR_CARDS; card++) { + cinfo = &cy_card[card]; + + if (!IS_CYC_Z(*cinfo)) + continue; + if (!ISZLOADED(*cinfo)) + continue; + + firm_id = cinfo->base_addr + ID_ADDRESS; + zfw_ctrl = cinfo->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &(zfw_ctrl->board_ctrl); + + /* Skip first polling cycle to avoid racing conditions with the FW */ + if (!cinfo->intr_enabled) { + cinfo->nports = (int)readl(&board_ctrl->n_channel); + cinfo->intr_enabled = 1; + continue; + } + + cyz_handle_cmd(cinfo); + + for (port = 0; port < cinfo->nports; port++) { + info = &cinfo->ports[port]; + tty = info->port.tty; + buf_ctrl = &(zfw_ctrl->buf_ctrl[port]); + + if (!info->throttle) + cyz_handle_rx(info, buf_ctrl); + cyz_handle_tx(info, buf_ctrl); + } + /* poll every 'cyz_polling_cycle' period */ + expires = jiffies + cyz_polling_cycle; + } + mod_timer(&cyz_timerlist, expires); +} /* cyz_poll */ + +#endif /* CONFIG_CYZ_INTR */ + +/********** End of block of Cyclades-Z specific code *********/ +/***********************************************************/ + +/* This is called whenever a port becomes active; + interrupts are enabled and DTR & RTS are turned on. + */ +static int startup(struct cyclades_port *info) +{ + struct cyclades_card *card; + unsigned long flags; + int retval = 0; + void __iomem *base_addr; + int chip, channel, index; + unsigned long page; + + card = info->card; + channel = info->line - card->first_line; + + page = get_zeroed_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + + spin_lock_irqsave(&card->card_lock, flags); + + if (info->port.flags & ASYNC_INITIALIZED) { + free_page(page); + goto errout; + } + + if (!info->type) { + if (info->port.tty) + set_bit(TTY_IO_ERROR, &info->port.tty->flags); + free_page(page); + goto errout; + } + + if (info->port.xmit_buf) + free_page(page); + else + info->port.xmit_buf = (unsigned char *)page; + + spin_unlock_irqrestore(&card->card_lock, flags); + + set_line_char(info); + + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, " + "base_addr %p\n", + card, chip, channel, base_addr); +#endif + spin_lock_irqsave(&card->card_lock, flags); + + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + + cy_writeb(base_addr + (CyRTPR << index), + (info->default_timeout ? info->default_timeout : 0x02)); + /* 10ms rx timeout */ + + cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR, + index); + + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); + cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); + +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:startup raising DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) | CyRxData); + info->port.flags |= ASYNC_INITIALIZED; + + if (info->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); + info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; + info->breakon = info->breakoff = 0; + memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); + info->idle_stats.in_use = + info->idle_stats.recv_idle = + info->idle_stats.xmit_idle = jiffies; + + spin_unlock_irqrestore(&card->card_lock, flags); + + } else { + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + + base_addr = card->base_addr; + + firm_id = base_addr + ID_ADDRESS; + if (!ISZLOADED(*card)) + return -ENODEV; + + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = zfw_ctrl->ch_ctrl; + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc startup Z card %d, channel %d, " + "base_addr %p\n", card, channel, base_addr); +#endif + spin_lock_irqsave(&card->card_lock, flags); + + cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE); +#ifdef Z_WAKE +#ifdef CONFIG_CYZ_INTR + cy_writel(&ch_ctrl[channel].intr_enable, + C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | + C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); +#else + cy_writel(&ch_ctrl[channel].intr_enable, + C_IN_IOCTLW | C_IN_MDCD); +#endif /* CONFIG_CYZ_INTR */ +#else +#ifdef CONFIG_CYZ_INTR + cy_writel(&ch_ctrl[channel].intr_enable, + C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | + C_IN_RXNNDT | C_IN_MDCD); +#else + cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD); +#endif /* CONFIG_CYZ_INTR */ +#endif /* Z_WAKE */ + + retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was " + "%x\n", info->line, retval); + } + + /* Flush RX buffers before raising DTR and RTS */ + retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was " + "%x\n", info->line, retval); + } + + /* set timeout !!! */ + /* set RTS and DTR !!! */ + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | + C_RS_DTR); + retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was " + "%x\n", info->line, retval); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:startup raising Z DTR\n"); +#endif + + /* enable send, recv, modem !!! */ + + info->port.flags |= ASYNC_INITIALIZED; + if (info->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); + info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; + info->breakon = info->breakoff = 0; + memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats)); + info->idle_stats.in_use = + info->idle_stats.recv_idle = + info->idle_stats.xmit_idle = jiffies; + + spin_unlock_irqrestore(&card->card_lock, flags); + } + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc startup done\n"); +#endif + return 0; + +errout: + spin_unlock_irqrestore(&card->card_lock, flags); + return retval; +} /* startup */ + +static void start_xmit(struct cyclades_port *info) +{ + struct cyclades_card *card; + unsigned long flags; + void __iomem *base_addr; + int chip, channel, index; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), channel); + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) | CyTxRdy); + spin_unlock_irqrestore(&card->card_lock, flags); + } else { +#ifdef CONFIG_CYZ_INTR + int retval; + + spin_lock_irqsave(&card->card_lock, flags); + retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was " + "%x\n", info->line, retval); + } + spin_unlock_irqrestore(&card->card_lock, flags); +#else /* CONFIG_CYZ_INTR */ + /* Don't have to do anything at this time */ +#endif /* CONFIG_CYZ_INTR */ + } +} /* 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) +{ + struct cyclades_card *card; + unsigned long flags; + void __iomem *base_addr; + int chip, channel, index; + + if (!(info->port.flags & ASYNC_INITIALIZED)) + return; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, " + "channel %d, base_addr %p\n", + card, chip, channel, base_addr); +#endif + + spin_lock_irqsave(&card->card_lock, flags); + + /* Clear delta_msr_wait queue to avoid mem leaks. */ + wake_up_interruptible(&info->delta_msr_wait); + + if (info->port.xmit_buf) { + unsigned char *temp; + temp = info->port.xmit_buf; + info->port.xmit_buf = NULL; + free_page((unsigned long)temp); + } + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { + cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS); + cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc shutdown dropping DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + } + cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index); + /* it may be appropriate to clear _XMIT at + some later date (after testing)!!! */ + + if (info->port.tty) + set_bit(TTY_IO_ERROR, &info->port.tty->flags); + info->port.flags &= ~ASYNC_INITIALIZED; + spin_unlock_irqrestore(&card->card_lock, flags); + } else { + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + int retval; + + base_addr = card->base_addr; +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " + "base_addr %p\n", card, channel, base_addr); +#endif + + firm_id = base_addr + ID_ADDRESS; + if (!ISZLOADED(*card)) + return; + + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = zfw_ctrl->ch_ctrl; + + spin_lock_irqsave(&card->card_lock, flags); + + if (info->port.xmit_buf) { + unsigned char *temp; + temp = info->port.xmit_buf; + info->port.xmit_buf = NULL; + free_page((unsigned long)temp); + } + + if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { + cy_writel(&ch_ctrl[channel].rs_control, + (__u32)(readl(&ch_ctrl[channel].rs_control) & + ~(C_RS_RTS | C_RS_DTR))); + retval = cyz_issue_cmd(info->card, channel, + C_CM_IOCTLM, 0L); + if (retval != 0) { + printk(KERN_ERR"cyc:shutdown retval on ttyC%d " + "was %x\n", info->line, retval); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n"); +#endif + } + + if (info->port.tty) + set_bit(TTY_IO_ERROR, &info->port.tty->flags); + info->port.flags &= ~ASYNC_INITIALIZED; + + spin_unlock_irqrestore(&card->card_lock, flags); + } + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc shutdown done\n"); +#endif +} /* shutdown */ + +/* + * ------------------------------------------------------------ + * cy_open() and friends + * ------------------------------------------------------------ + */ + +static int +block_til_ready(struct tty_struct *tty, struct file *filp, + struct cyclades_port *info) +{ + DECLARE_WAITQUEUE(wait, current); + struct cyclades_card *cinfo; + unsigned long flags; + int chip, channel, index; + int retval; + void __iomem *base_addr; + + cinfo = info->card; + channel = info->line - cinfo->first_line; + + /* + * If the device is in the middle of being closed, then block + * until it's done, and then try again. + */ + if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { + wait_event_interruptible(info->port.close_wait, + !(info->port.flags & ASYNC_CLOSING)); + return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; + } + + /* + * If non-blocking mode is set, then make the check up front + * and then exit. + */ + if ((filp->f_flags & O_NONBLOCK) || + (tty->flags & (1 << TTY_IO_ERROR))) { + info->port.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->port.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->port.open_wait, &wait); +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, " + "count = %d\n", info->line, info->port.count); +#endif + spin_lock_irqsave(&cinfo->card_lock, flags); + if (!tty_hung_up_p(filp)) + info->port.count--; + spin_unlock_irqrestore(&cinfo->card_lock, flags); +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to " + "%d\n", current->pid, info->port.count); +#endif + info->port.blocked_open++; + + if (!IS_CYC_Z(*cinfo)) { + chip = channel >> 2; + channel &= 0x03; + index = cinfo->bus_index; + base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); + + while (1) { + spin_lock_irqsave(&cinfo->card_lock, flags); + if ((tty->termios->c_cflag & CBAUD)) { + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + cy_writeb(base_addr + (CyMSVR1 << index), + CyRTS); + cy_writeb(base_addr + (CyMSVR2 << index), + CyDTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:block_til_ready raising " + "DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + } + spin_unlock_irqrestore(&cinfo->card_lock, flags); + + set_current_state(TASK_INTERRUPTIBLE); + if (tty_hung_up_p(filp) || + !(info->port.flags & ASYNC_INITIALIZED)) { + retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? + -EAGAIN : -ERESTARTSYS); + break; + } + + spin_lock_irqsave(&cinfo->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || + (readb(base_addr + + (CyMSVR1 << index)) & CyDCD))) { + spin_unlock_irqrestore(&cinfo->card_lock, flags); + break; + } + spin_unlock_irqrestore(&cinfo->card_lock, flags); + + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc block_til_ready blocking: " + "ttyC%d, count = %d\n", + info->line, info->port.count); +#endif + schedule(); + } + } else { + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + + base_addr = cinfo->base_addr; + firm_id = base_addr + ID_ADDRESS; + if (!ISZLOADED(*cinfo)) { + __set_current_state(TASK_RUNNING); + remove_wait_queue(&info->port.open_wait, &wait); + return -EINVAL; + } + + zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr) + & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = zfw_ctrl->ch_ctrl; + + while (1) { + if ((tty->termios->c_cflag & CBAUD)) { + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) | + C_RS_RTS | C_RS_DTR); + retval = cyz_issue_cmd(cinfo, + channel, C_CM_IOCTLM, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:block_til_ready " + "retval on ttyC%d was %x\n", + info->line, retval); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:block_til_ready raising " + "Z DTR\n"); +#endif + } + + set_current_state(TASK_INTERRUPTIBLE); + if (tty_hung_up_p(filp) || + !(info->port.flags & ASYNC_INITIALIZED)) { + retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? + -EAGAIN : -ERESTARTSYS); + break; + } + if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || + (readl(&ch_ctrl[channel].rs_status) & + C_RS_DCD))) { + break; + } + if (signal_pending(current)) { + retval = -ERESTARTSYS; + break; + } +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc block_til_ready blocking: " + "ttyC%d, count = %d\n", + info->line, info->port.count); +#endif + schedule(); + } + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(&info->port.open_wait, &wait); + if (!tty_hung_up_p(filp)) { + info->port.count++; +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing " + "count to %d\n", current->pid, info->port.count); +#endif + } + info->port.blocked_open--; +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, " + "count = %d\n", info->line, info->port.count); +#endif + if (retval) + return retval; + info->port.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. + */ +static int cy_open(struct tty_struct *tty, struct file *filp) +{ + struct cyclades_port *info; + unsigned int i, line; + int retval; + + line = tty->index; + if (tty->index < 0 || NR_PORTS <= line) + return -ENODEV; + + for (i = 0; i < NR_CARDS; i++) + if (line < cy_card[i].first_line + cy_card[i].nports && + line >= cy_card[i].first_line) + break; + if (i >= NR_CARDS) + return -ENODEV; + info = &cy_card[i].ports[line - cy_card[i].first_line]; + if (info->line < 0) + return -ENODEV; + + /* If the card's firmware hasn't been loaded, + treat it as absent from the system. This + will make the user pay attention. + */ + if (IS_CYC_Z(*info->card)) { + struct cyclades_card *cinfo = info->card; + struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; + + if (!ISZLOADED(*cinfo)) { + if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *) + (cinfo->ctl_addr))->mail_box_0)) && + Z_FPGA_CHECK(*cinfo)) && + (ZFIRM_HLT == readl( + &firm_id->signature))) { + printk(KERN_ERR "cyc:Cyclades-Z Error: you " + "need an external power supply for " + "this number of ports.\nFirmware " + "halted.\n"); + } else { + printk(KERN_ERR "cyc:Cyclades-Z firmware not " + "yet loaded\n"); + } + return -ENODEV; + } +#ifdef CONFIG_CYZ_INTR + else { + /* In case this Z board is operating in interrupt mode, its + interrupts should be enabled as soon as the first open + happens to one of its ports. */ + if (!cinfo->intr_enabled) { + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + + zfw_ctrl = cinfo->base_addr + + (readl(&firm_id->zfwctrl_addr) & + 0xfffff); + + board_ctrl = &zfw_ctrl->board_ctrl; + + /* Enable interrupts on the PLX chip */ + cy_writew(cinfo->ctl_addr + 0x68, + readw(cinfo->ctl_addr + 0x68) | 0x0900); + /* Enable interrupts on the FW */ + retval = cyz_issue_cmd(cinfo, 0, + C_CM_IRQ_ENBL, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:IRQ enable retval " + "was %x\n", retval); + } + cinfo->nports = + (int)readl(&board_ctrl->n_channel); + cinfo->intr_enabled = 1; + } + } +#endif /* CONFIG_CYZ_INTR */ + /* Make sure this Z port really exists in hardware */ + if (info->line > (cinfo->first_line + cinfo->nports - 1)) + return -ENODEV; + } +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line); +#endif + tty->driver_data = info; + info->port.tty = tty; + if (serial_paranoia_check(info, tty->name, "cy_open")) + return -ENODEV; + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line, + info->port.count); +#endif + info->port.count++; +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n", + current->pid, info->port.count); +#endif + + /* + * If the port is the middle of closing, bail out now + */ + if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { + wait_event_interruptible(info->port.close_wait, + !(info->port.flags & ASYNC_CLOSING)); + return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; + } + + /* + * Start up serial port + */ + retval = startup(info); + if (retval) + return retval; + + retval = block_til_ready(tty, filp, info); + if (retval) { +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready " + "with %d\n", retval); +#endif + return retval; + } + + info->throttle = 0; + +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc:cy_open done\n"); +#endif + return 0; +} /* cy_open */ + +/* + * cy_wait_until_sent() --- wait until the transmitter is empty + */ +static void cy_wait_until_sent(struct tty_struct *tty, int timeout) +{ + struct cyclades_card *card; + struct cyclades_port *info = tty->driver_data; + void __iomem *base_addr; + int chip, channel, index; + unsigned long orig_jiffies; + int char_time; + + if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) + return; + + if (info->xmit_fifo_size == 0) + return; /* Just in case.... */ + + orig_jiffies = jiffies; + lock_kernel(); + /* + * Set the check interval to be 1/5 of the estimated time to + * send a single character, and make it at least 1. The check + * interval should also be less than the timeout. + * + * Note: we have to use pretty tight timings here to satisfy + * the NIST-PCTS. + */ + char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; + char_time = char_time / 5; + if (char_time <= 0) + char_time = 1; + if (timeout < 0) + timeout = 0; + if (timeout) + char_time = min(char_time, timeout); + /* + * If the transmitter hasn't cleared in twice the approximate + * amount of time to send the entire FIFO, it probably won't + * ever clear. This assumes the UART isn't doing flow + * control, which is currently the case. Hence, if it ever + * takes longer than info->timeout, this is probably due to a + * UART bug of some kind. So, we clamp the timeout parameter at + * 2*info->timeout. + */ + if (!timeout || timeout > 2 * info->timeout) + timeout = 2 * info->timeout; +#ifdef CY_DEBUG_WAIT_UNTIL_SENT + printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...", + timeout, char_time, jiffies); +#endif + card = info->card; + channel = (info->line) - (card->first_line); + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + while (readb(base_addr + (CySRER << index)) & CyTxRdy) { +#ifdef CY_DEBUG_WAIT_UNTIL_SENT + printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies); +#endif + if (msleep_interruptible(jiffies_to_msecs(char_time))) + break; + if (timeout && time_after(jiffies, orig_jiffies + + timeout)) + break; + } + } + /* Run one more char cycle */ + msleep_interruptible(jiffies_to_msecs(char_time * 5)); + unlock_kernel(); +#ifdef CY_DEBUG_WAIT_UNTIL_SENT + printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); +#endif +} + +static void cy_flush_buffer(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + int channel, retval; + unsigned long flags; + +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) + return; + + card = info->card; + channel = info->line - card->first_line; + + spin_lock_irqsave(&card->card_lock, flags); + info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; + spin_unlock_irqrestore(&card->card_lock, flags); + + if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board + buffers as well */ + spin_lock_irqsave(&card->card_lock, flags); + retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d " + "was %x\n", info->line, retval); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } + tty_wakeup(tty); +} /* cy_flush_buffer */ + + +/* + * This routine is called when a particular tty device is closed. + */ +static void cy_close(struct tty_struct *tty, struct file *filp) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + unsigned long flags; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line); +#endif + + if (!info || serial_paranoia_check(info, tty->name, "cy_close")) + return; + + card = info->card; + + spin_lock_irqsave(&card->card_lock, flags); + /* If the TTY is being hung up, nothing to do */ + if (tty_hung_up_p(filp)) { + spin_unlock_irqrestore(&card->card_lock, flags); + return; + } +#ifdef CY_DEBUG_OPEN + printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line, + info->port.count); +#endif + if ((tty->count == 1) && (info->port.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(KERN_ERR "cyc:cy_close: bad serial port count; " + "tty->count is 1, info->port.count is %d\n", info->port.count); + info->port.count = 1; + } +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n", + current->pid, info->port.count - 1); +#endif + if (--info->port.count < 0) { +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n"); +#endif + info->port.count = 0; + } + if (info->port.count) { + spin_unlock_irqrestore(&card->card_lock, flags); + return; + } + info->port.flags |= ASYNC_CLOSING; + + /* + * Now we wait for the transmit buffer to clear; and we notify + * the line discipline to only process XON/XOFF characters. + */ + tty->closing = 1; + spin_unlock_irqrestore(&card->card_lock, flags); + if (info->port.closing_wait != CY_CLOSING_WAIT_NONE) + tty_wait_until_sent(tty, info->port.closing_wait); + + spin_lock_irqsave(&card->card_lock, flags); + + if (!IS_CYC_Z(*card)) { + int channel = info->line - card->first_line; + int index = card->bus_index; + void __iomem *base_addr = card->base_addr + + (cy_chip_offset[channel >> 2] << index); + /* Stop accepting input */ + channel &= 0x03; + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & ~CyRxData); + if (info->port.flags & ASYNC_INITIALIZED) { + /* Waiting for on-board buffers to be empty before + closing the port */ + spin_unlock_irqrestore(&card->card_lock, flags); + cy_wait_until_sent(tty, info->timeout); + spin_lock_irqsave(&card->card_lock, flags); + } + } else { +#ifdef Z_WAKE + /* Waiting for on-board buffers to be empty before closing + the port */ + void __iomem *base_addr = card->base_addr; + struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS; + struct ZFW_CTRL __iomem *zfw_ctrl = + base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl; + int channel = info->line - card->first_line; + int retval; + + if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) { + retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L); + if (retval != 0) { + printk(KERN_DEBUG "cyc:cy_close retval on " + "ttyC%d was %x\n", info->line, retval); + } + spin_unlock_irqrestore(&card->card_lock, flags); + wait_for_completion_interruptible(&info->shutdown_wait); + spin_lock_irqsave(&card->card_lock, flags); + } +#endif + } + + spin_unlock_irqrestore(&card->card_lock, flags); + shutdown(info); + cy_flush_buffer(tty); + tty_ldisc_flush(tty); + spin_lock_irqsave(&card->card_lock, flags); + + tty->closing = 0; + info->port.tty = NULL; + if (info->port.blocked_open) { + spin_unlock_irqrestore(&card->card_lock, flags); + if (info->port.close_delay) { + msleep_interruptible(jiffies_to_msecs + (info->port.close_delay)); + } + wake_up_interruptible(&info->port.open_wait); + spin_lock_irqsave(&card->card_lock, flags); + } + info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); + wake_up_interruptible(&info->port.close_wait); + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_close done\n"); +#endif + + spin_unlock_irqrestore(&card->card_lock, flags); +} /* cy_close */ + +/* This routine gets called when tty_write has put something into + * the write_queue. The characters may come from user space or + * kernel space. + * + * This routine will return the number of characters actually + * accepted for writing. + * + * 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, const unsigned char *buf, int count) +{ + struct cyclades_port *info = tty->driver_data; + unsigned long flags; + int c, ret = 0; + +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_write")) + return 0; + + if (!info->port.xmit_buf) + return 0; + + spin_lock_irqsave(&info->card->card_lock, flags); + while (1) { + c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1)); + c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head)); + + if (c <= 0) + break; + + memcpy(info->port.xmit_buf + info->xmit_head, buf, c); + info->xmit_head = (info->xmit_head + c) & + (SERIAL_XMIT_SIZE - 1); + info->xmit_cnt += c; + buf += c; + count -= c; + ret += c; + } + spin_unlock_irqrestore(&info->card->card_lock, flags); + + info->idle_stats.xmit_bytes += ret; + info->idle_stats.xmit_idle = jiffies; + + if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) + start_xmit(info); + + return ret; +} /* cy_write */ + +/* + * This routine is called by the kernel to write a single + * character to the tty device. If the kernel uses this routine, + * it must call the flush_chars() routine (if defined) when it is + * done stuffing characters into the driver. If there is no room + * in the queue, the character is ignored. + */ +static int cy_put_char(struct tty_struct *tty, unsigned char ch) +{ + struct cyclades_port *info = tty->driver_data; + unsigned long flags; + +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_put_char")) + return 0; + + if (!info->port.xmit_buf) + return 0; + + spin_lock_irqsave(&info->card->card_lock, flags); + if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) { + spin_unlock_irqrestore(&info->card->card_lock, flags); + return 0; + } + + info->port.xmit_buf[info->xmit_head++] = ch; + info->xmit_head &= SERIAL_XMIT_SIZE - 1; + info->xmit_cnt++; + info->idle_stats.xmit_bytes++; + info->idle_stats.xmit_idle = jiffies; + spin_unlock_irqrestore(&info->card->card_lock, flags); + return 1; +} /* cy_put_char */ + +/* + * This routine is called by the kernel after it has written a + * series of characters to the tty device using put_char(). + */ +static void cy_flush_chars(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_flush_chars")) + return; + + if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || + !info->port.xmit_buf) + return; + + start_xmit(info); +} /* cy_flush_chars */ + +/* + * This routine returns the numbers of characters the tty driver + * will accept for queuing to be written. This number is subject + * to change as output buffers get emptied, or if the output flow + * control is activated. + */ +static int cy_write_room(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + int ret; + +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_write_room")) + return 0; + ret = SERIAL_XMIT_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_card *card; + struct cyclades_port *info = tty->driver_data; + int channel; + + if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer")) + return 0; + + card = info->card; + channel = (info->line) - (card->first_line); + +#ifdef Z_EXT_CHARS_IN_BUFFER + if (!IS_CYC_Z(cy_card[card])) { +#endif /* Z_EXT_CHARS_IN_BUFFER */ +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", + info->line, info->xmit_cnt); +#endif + return info->xmit_cnt; +#ifdef Z_EXT_CHARS_IN_BUFFER + } else { + static struct FIRM_ID *firm_id; + static struct ZFW_CTRL *zfw_ctrl; + static struct CH_CTRL *ch_ctrl; + static struct BUF_CTRL *buf_ctrl; + int char_count; + __u32 tx_put, tx_get, tx_bufsize; + + lock_kernel(); + firm_id = card->base_addr + ID_ADDRESS; + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); + buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); + + tx_get = readl(&buf_ctrl->tx_get); + tx_put = readl(&buf_ctrl->tx_put); + tx_bufsize = readl(&buf_ctrl->tx_bufsize); + if (tx_put >= tx_get) + char_count = tx_put - tx_get; + else + char_count = tx_put - tx_get + tx_bufsize; +#ifdef CY_DEBUG_IO + printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n", + info->line, info->xmit_cnt + char_count); +#endif + unlock_kernel(); + return info->xmit_cnt + char_count; + } +#endif /* Z_EXT_CHARS_IN_BUFFER */ +} /* cy_chars_in_buffer */ + +/* + * ------------------------------------------------------------ + * cy_ioctl() and friends + * ------------------------------------------------------------ + */ + +static void cyy_baud_calc(struct cyclades_port *info, __u32 baud) +{ + int co, co_val, bpr; + __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 : + 25000000); + + if (baud == 0) { + info->tbpr = info->tco = info->rbpr = info->rco = 0; + return; + } + + /* determine which prescaler to use */ + for (co = 4, co_val = 2048; co; co--, co_val >>= 2) { + if (cy_clock / co_val / baud > 63) + break; + } + + bpr = (cy_clock / co_val * 2 / baud + 1) / 2; + if (bpr > 255) + bpr = 255; + + info->tbpr = info->rbpr = bpr; + info->tco = info->rco = co; +} + +/* + * This routine finds or computes the various line characteristics. + * It used to be called config_setup + */ +static void set_line_char(struct cyclades_port *info) +{ + struct cyclades_card *card; + unsigned long flags; + void __iomem *base_addr; + int chip, channel, index; + unsigned cflag, iflag; + unsigned short chip_number; + int baud, baud_rate = 0; + int i; + + if (!info->port.tty || !info->port.tty->termios) + return; + + if (info->line == -1) + return; + + cflag = info->port.tty->termios->c_cflag; + iflag = info->port.tty->termios->c_iflag; + + /* + * Set up the tty->alt_speed kludge + */ + if (info->port.tty) { + if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) + info->port.tty->alt_speed = 57600; + if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) + info->port.tty->alt_speed = 115200; + if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) + info->port.tty->alt_speed = 230400; + if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) + info->port.tty->alt_speed = 460800; + } + + card = info->card; + channel = info->line - card->first_line; + chip_number = channel / 4; + + if (!IS_CYC_Z(*card)) { + + index = card->bus_index; + + /* baud rate */ + baud = tty_get_baud_rate(info->port.tty); + if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == + ASYNC_SPD_CUST) { + if (info->custom_divisor) + baud_rate = info->baud / info->custom_divisor; + else + baud_rate = info->baud; + } else if (baud > CD1400_MAX_SPEED) { + baud = CD1400_MAX_SPEED; + } + /* find the baud index */ + for (i = 0; i < 20; i++) { + if (baud == baud_table[i]) + break; + } + if (i == 20) + i = 19; /* CD1400_MAX_SPEED */ + + if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == + ASYNC_SPD_CUST) { + cyy_baud_calc(info, baud_rate); + } else { + if (info->chip_rev >= CD1400_REV_J) { + /* It is a CD1400 rev. J or later */ + info->tbpr = baud_bpr_60[i]; /* Tx BPR */ + info->tco = baud_co_60[i]; /* Tx CO */ + info->rbpr = baud_bpr_60[i]; /* Rx BPR */ + info->rco = baud_co_60[i]; /* Rx CO */ + } else { + info->tbpr = baud_bpr_25[i]; /* Tx BPR */ + info->tco = baud_co_25[i]; /* Tx CO */ + info->rbpr = baud_bpr_25[i]; /* Rx BPR */ + info->rco = baud_co_25[i]; /* Rx CO */ + } + } + if (baud_table[i] == 134) { + /* get it right for 134.5 baud */ + info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + + 2; + } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == + ASYNC_SPD_CUST) { + info->timeout = (info->xmit_fifo_size * HZ * 15 / + baud_rate) + 2; + } 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; + /* receive threshold */ + info->cor3 = (info->default_threshold ? + info->default_threshold : baud_cor3[i]); + 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->port.flags |= ASYNC_CTS_FLOW; + info->cor2 |= CyCtsAE; + } else { + info->port.flags &= ~ASYNC_CTS_FLOW; + info->cor2 &= ~CyCtsAE; + } + if (cflag & CLOCAL) + info->port.flags &= ~ASYNC_CHECK_CD; + else + info->port.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. + ***********************************************/ + + chip = channel >> 2; + channel &= 0x03; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + + /* tx and rx baud rate */ + + cy_writeb(base_addr + (CyTCOR << index), info->tco); + cy_writeb(base_addr + (CyTBPR << index), info->tbpr); + cy_writeb(base_addr + (CyRCOR << index), info->rco); + cy_writeb(base_addr + (CyRBPR << index), info->rbpr); + + /* set line characteristics according configuration */ + + cy_writeb(base_addr + (CySCHR1 << index), + START_CHAR(info->port.tty)); + cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty)); + cy_writeb(base_addr + (CyCOR1 << index), info->cor1); + cy_writeb(base_addr + (CyCOR2 << index), info->cor2); + cy_writeb(base_addr + (CyCOR3 << index), info->cor3); + cy_writeb(base_addr + (CyCOR4 << index), info->cor4); + cy_writeb(base_addr + (CyCOR5 << index), info->cor5); + + cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch | + CyCOR3ch, index); + + /* !!! Is this needed? */ + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + cy_writeb(base_addr + (CyRTPR << index), + (info->default_timeout ? info->default_timeout : 0x02)); + /* 10ms rx timeout */ + + if (C_CLOCAL(info->port.tty)) { + /* without modem intr */ + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) | CyMdmCh); + /* act on 1->0 modem transitions */ + if ((cflag & CRTSCTS) && info->rflow) { + cy_writeb(base_addr + (CyMCOR1 << index), + (CyCTS | rflow_thr[i])); + } else { + cy_writeb(base_addr + (CyMCOR1 << index), + CyCTS); + } + /* act on 0->1 modem transitions */ + cy_writeb(base_addr + (CyMCOR2 << index), CyCTS); + } else { + /* without modem intr */ + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + + (CySRER << index)) | CyMdmCh); + /* act on 1->0 modem transitions */ + if ((cflag & CRTSCTS) && info->rflow) { + cy_writeb(base_addr + (CyMCOR1 << index), + (CyDSR | CyCTS | CyRI | CyDCD | + rflow_thr[i])); + } else { + cy_writeb(base_addr + (CyMCOR1 << index), + CyDSR | CyCTS | CyRI | CyDCD); + } + /* act on 0->1 modem transitions */ + cy_writeb(base_addr + (CyMCOR2 << index), + CyDSR | CyCTS | CyRI | CyDCD); + } + + if (i == 0) { /* baud rate is zero, turn off line */ + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR1 << index), + ~CyRTS); + } else { + cy_writeb(base_addr + (CyMSVR2 << index), + ~CyDTR); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + } else { + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR1 << index), + CyRTS); + } else { + cy_writeb(base_addr + (CyMSVR2 << index), + CyDTR); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_line_char raising DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + } + + if (info->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); + spin_unlock_irqrestore(&card->card_lock, flags); + + } else { + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + struct BUF_CTRL __iomem *buf_ctrl; + __u32 sw_flow; + int retval; + + firm_id = card->base_addr + ID_ADDRESS; + if (!ISZLOADED(*card)) + return; + + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); + buf_ctrl = &zfw_ctrl->buf_ctrl[channel]; + + /* baud rate */ + baud = tty_get_baud_rate(info->port.tty); + if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == + ASYNC_SPD_CUST) { + if (info->custom_divisor) + baud_rate = info->baud / info->custom_divisor; + else + baud_rate = info->baud; + } else if (baud > CYZ_MAX_SPEED) { + baud = CYZ_MAX_SPEED; + } + cy_writel(&ch_ctrl->comm_baud, baud); + + if (baud == 134) { + /* get it right for 134.5 baud */ + info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) + + 2; + } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) == + ASYNC_SPD_CUST) { + info->timeout = (info->xmit_fifo_size * HZ * 15 / + baud_rate) + 2; + } else if (baud) { + info->timeout = (info->xmit_fifo_size * HZ * 15 / + baud) + 2; + /* this needs to be propagated into the card info */ + } else { + info->timeout = 0; + } + + /* byte size and parity */ + switch (cflag & CSIZE) { + case CS5: + cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5); + break; + case CS6: + cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6); + break; + case CS7: + cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7); + break; + case CS8: + cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8); + break; + } + if (cflag & CSTOPB) { + cy_writel(&ch_ctrl->comm_data_l, + readl(&ch_ctrl->comm_data_l) | C_DL_2STOP); + } else { + cy_writel(&ch_ctrl->comm_data_l, + readl(&ch_ctrl->comm_data_l) | C_DL_1STOP); + } + if (cflag & PARENB) { + if (cflag & PARODD) + cy_writel(&ch_ctrl->comm_parity, C_PR_ODD); + else + cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN); + } else + cy_writel(&ch_ctrl->comm_parity, C_PR_NONE); + + /* CTS flow control flag */ + if (cflag & CRTSCTS) { + cy_writel(&ch_ctrl->hw_flow, + readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS); + } else { + cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) & + ~(C_RS_CTS | C_RS_RTS)); + } + /* As the HW flow control is done in firmware, the driver + doesn't need to care about it */ + info->port.flags &= ~ASYNC_CTS_FLOW; + + /* XON/XOFF/XANY flow control flags */ + sw_flow = 0; + if (iflag & IXON) { + sw_flow |= C_FL_OXX; + if (iflag & IXANY) + sw_flow |= C_FL_OIXANY; + } + cy_writel(&ch_ctrl->sw_flow, sw_flow); + + retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:set_line_char retval on ttyC%d " + "was %x\n", info->line, retval); + } + + /* CD sensitivity */ + if (cflag & CLOCAL) + info->port.flags &= ~ASYNC_CHECK_CD; + else + info->port.flags |= ASYNC_CHECK_CD; + + if (baud == 0) { /* baud rate is zero, turn off line */ + cy_writel(&ch_ctrl->rs_control, + readl(&ch_ctrl->rs_control) & ~C_RS_DTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n"); +#endif + } else { + cy_writel(&ch_ctrl->rs_control, + readl(&ch_ctrl->rs_control) | C_RS_DTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n"); +#endif + } + + retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d " + "was %x\n", info->line, retval); + } + + if (info->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); + } +} /* set_line_char */ + +static int +get_serial_info(struct cyclades_port *info, + struct serial_struct __user *retinfo) +{ + struct serial_struct tmp; + struct cyclades_card *cinfo = info->card; + + if (!retinfo) + return -EFAULT; + memset(&tmp, 0, sizeof(tmp)); + tmp.type = info->type; + tmp.line = info->line; + tmp.port = (info->card - cy_card) * 0x100 + info->line - + cinfo->first_line; + tmp.irq = cinfo->irq; + tmp.flags = info->port.flags; + tmp.close_delay = info->port.close_delay; + tmp.closing_wait = info->port.closing_wait; + tmp.baud_base = info->baud; + tmp.custom_divisor = info->custom_divisor; + tmp.hub6 = 0; /*!!! */ + return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0; +} /* get_serial_info */ + +static int +set_serial_info(struct cyclades_port *info, + struct serial_struct __user *new_info) +{ + struct serial_struct new_serial; + struct cyclades_port old_info; + + if (copy_from_user(&new_serial, new_info, sizeof(new_serial))) + return -EFAULT; + old_info = *info; + + if (!capable(CAP_SYS_ADMIN)) { + if (new_serial.close_delay != info->port.close_delay || + new_serial.baud_base != info->baud || + (new_serial.flags & ASYNC_FLAGS & + ~ASYNC_USR_MASK) != + (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)) + return -EPERM; + info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) | + (new_serial.flags & ASYNC_USR_MASK); + info->baud = new_serial.baud_base; + info->custom_divisor = new_serial.custom_divisor; + goto check_and_exit; + } + + /* + * OK, past this point, all the error checking has been done. + * At this point, we start making changes..... + */ + + info->baud = new_serial.baud_base; + info->custom_divisor = new_serial.custom_divisor; + info->port.flags = (info->port.flags & ~ASYNC_FLAGS) | + (new_serial.flags & ASYNC_FLAGS); + info->port.close_delay = new_serial.close_delay * HZ / 100; + info->port.closing_wait = new_serial.closing_wait * HZ / 100; + +check_and_exit: + if (info->port.flags & ASYNC_INITIALIZED) { + set_line_char(info); + return 0; + } else { + return startup(info); + } +} /* set_serial_info */ + +/* + * get_lsr_info - get line status register info + * + * Purpose: Let user call ioctl() to get info when the UART physically + * is emptied. On bus types like RS485, the transmitter must + * release the bus after transmitting. This must be done when + * the transmit shift register is empty, not be done when the + * transmit holding register is empty. This functionality + * allows an RS485 driver to be written in user space. + */ +static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value) +{ + struct cyclades_card *card; + int chip, channel, index; + unsigned char status; + unsigned int result; + unsigned long flags; + void __iomem *base_addr; + + card = info->card; + channel = (info->line) - (card->first_line); + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + status = readb(base_addr + (CySRER << index)) & + (CyTxRdy | CyTxMpty); + spin_unlock_irqrestore(&card->card_lock, flags); + result = (status ? 0 : TIOCSER_TEMT); + } else { + /* Not supported yet */ + return -EINVAL; + } + return put_user(result, (unsigned long __user *)value); +} + +static int cy_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + int chip, channel, index; + void __iomem *base_addr; + unsigned long flags; + unsigned char status; + unsigned long lstatus; + unsigned int result; + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + + if (serial_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + + lock_kernel(); + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), (u_char) channel); + status = readb(base_addr + (CyMSVR1 << index)); + status |= readb(base_addr + (CyMSVR2 << index)); + spin_unlock_irqrestore(&card->card_lock, flags); + + if (info->rtsdtr_inv) { + result = ((status & CyRTS) ? TIOCM_DTR : 0) | + ((status & CyDTR) ? TIOCM_RTS : 0); + } else { + result = ((status & CyRTS) ? TIOCM_RTS : 0) | + ((status & CyDTR) ? TIOCM_DTR : 0); + } + result |= ((status & CyDCD) ? TIOCM_CAR : 0) | + ((status & CyRI) ? TIOCM_RNG : 0) | + ((status & CyDSR) ? TIOCM_DSR : 0) | + ((status & CyCTS) ? TIOCM_CTS : 0); + } else { + base_addr = card->base_addr; + firm_id = card->base_addr + ID_ADDRESS; + if (ISZLOADED(*card)) { + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = zfw_ctrl->ch_ctrl; + lstatus = readl(&ch_ctrl[channel].rs_status); + result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) | + ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) | + ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) | + ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) | + ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) | + ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0); + } else { + result = 0; + unlock_kernel(); + return -ENODEV; + } + + } + unlock_kernel(); + return result; +} /* cy_tiomget */ + +static int +cy_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + int chip, channel, index; + void __iomem *base_addr; + unsigned long flags; + struct FIRM_ID __iomem *firm_id; + struct ZFW_CTRL __iomem *zfw_ctrl; + struct BOARD_CTRL __iomem *board_ctrl; + struct CH_CTRL __iomem *ch_ctrl; + int retval; + + if (serial_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + + card = info->card; + channel = (info->line) - (card->first_line); + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + if (set & TIOCM_RTS) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR2 << index), + CyDTR); + } else { + cy_writeb(base_addr + (CyMSVR1 << index), + CyRTS); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (clear & TIOCM_RTS) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR2 << index), + ~CyDTR); + } else { + cy_writeb(base_addr + (CyMSVR1 << index), + ~CyRTS); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (set & TIOCM_DTR) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR1 << index), + CyRTS); + } else { + cy_writeb(base_addr + (CyMSVR2 << index), + CyDTR); + } +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (clear & TIOCM_DTR) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR1 << index), + ~CyRTS); + } else { + cy_writeb(base_addr + (CyMSVR2 << index), + ~CyDTR); + } + +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n"); + printk(KERN_DEBUG " status: 0x%x, 0x%x\n", + readb(base_addr + (CyMSVR1 << index)), + readb(base_addr + (CyMSVR2 << index))); +#endif + spin_unlock_irqrestore(&card->card_lock, flags); + } + } else { + base_addr = card->base_addr; + + firm_id = card->base_addr + ID_ADDRESS; + if (ISZLOADED(*card)) { + zfw_ctrl = card->base_addr + + (readl(&firm_id->zfwctrl_addr) & 0xfffff); + board_ctrl = &zfw_ctrl->board_ctrl; + ch_ctrl = zfw_ctrl->ch_ctrl; + + if (set & TIOCM_RTS) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) | + C_RS_RTS); + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (clear & TIOCM_RTS) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) & + ~C_RS_RTS); + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (set & TIOCM_DTR) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) | + C_RS_DTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_modem_info raising " + "Z DTR\n"); +#endif + spin_unlock_irqrestore(&card->card_lock, flags); + } + if (clear & TIOCM_DTR) { + spin_lock_irqsave(&card->card_lock, flags); + cy_writel(&ch_ctrl[channel].rs_control, + readl(&ch_ctrl[channel].rs_control) & + ~C_RS_DTR); +#ifdef CY_DEBUG_DTR + printk(KERN_DEBUG "cyc:set_modem_info clearing " + "Z DTR\n"); +#endif + spin_unlock_irqrestore(&card->card_lock, flags); + } + } else { + return -ENODEV; + } + spin_lock_irqsave(&card->card_lock, flags); + retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d " + "was %x\n", info->line, retval); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } + return 0; +} /* cy_tiocmset */ + +/* + * cy_break() --- routine which turns the break handling on or off + */ +static int cy_break(struct tty_struct *tty, int break_state) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + unsigned long flags; + int retval = 0; + + if (serial_paranoia_check(info, tty->name, "cy_break")) + return -EINVAL; + + card = info->card; + + spin_lock_irqsave(&card->card_lock, flags); + if (!IS_CYC_Z(*card)) { + /* Let the transmit ISR take care of this (since it + requires stuffing characters into the output stream). + */ + if (break_state == -1) { + if (!info->breakon) { + info->breakon = 1; + if (!info->xmit_cnt) { + spin_unlock_irqrestore(&card->card_lock, flags); + start_xmit(info); + spin_lock_irqsave(&card->card_lock, flags); + } + } + } else { + if (!info->breakoff) { + info->breakoff = 1; + if (!info->xmit_cnt) { + spin_unlock_irqrestore(&card->card_lock, flags); + start_xmit(info); + spin_lock_irqsave(&card->card_lock, flags); + } + } + } + } else { + if (break_state == -1) { + retval = cyz_issue_cmd(card, + info->line - card->first_line, + C_CM_SET_BREAK, 0L); + if (retval != 0) { + printk(KERN_ERR "cyc:cy_break (set) retval on " + "ttyC%d was %x\n", info->line, retval); + } + } else { + retval = cyz_issue_cmd(card, + info->line - card->first_line, + C_CM_CLR_BREAK, 0L); + if (retval != 0) { + printk(KERN_DEBUG "cyc:cy_break (clr) retval " + "on ttyC%d was %x\n", info->line, + retval); + } + } + } + spin_unlock_irqrestore(&card->card_lock, flags); + return retval; +} /* cy_break */ + +static int get_mon_info(struct cyclades_port *info, + struct cyclades_monitor __user *mon) +{ + + if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor))) + return -EFAULT; + info->mon.int_count = 0; + info->mon.char_count = 0; + info->mon.char_max = 0; + info->mon.char_last = 0; + return 0; +} /* get_mon_info */ + +static int set_threshold(struct cyclades_port *info, unsigned long value) +{ + struct cyclades_card *card; + void __iomem *base_addr; + int channel, chip, index; + unsigned long flags; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = + card->base_addr + (cy_chip_offset[chip] << index); + + info->cor3 &= ~CyREC_FIFO; + info->cor3 |= value & CyREC_FIFO; + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCOR3 << index), info->cor3); + cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index); + spin_unlock_irqrestore(&card->card_lock, flags); + } + return 0; +} /* set_threshold */ + +static int get_threshold(struct cyclades_port *info, + unsigned long __user *value) +{ + struct cyclades_card *card; + void __iomem *base_addr; + int channel, chip, index; + unsigned long tmp; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO; + return put_user(tmp, value); + } + return 0; +} /* get_threshold */ + +static int set_default_threshold(struct cyclades_port *info, + unsigned long value) +{ + info->default_threshold = value & 0x0f; + return 0; +} /* set_default_threshold */ + +static int get_default_threshold(struct cyclades_port *info, + unsigned long __user *value) +{ + return put_user(info->default_threshold, value); +} /* get_default_threshold */ + +static int set_timeout(struct cyclades_port *info, unsigned long value) +{ + struct cyclades_card *card; + void __iomem *base_addr; + int channel, chip, index; + unsigned long flags; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyRTPR << index), value & 0xff); + spin_unlock_irqrestore(&card->card_lock, flags); + } + return 0; +} /* set_timeout */ + +static int get_timeout(struct cyclades_port *info, + unsigned long __user *value) +{ + struct cyclades_card *card; + void __iomem *base_addr; + int channel, chip, index; + unsigned long tmp; + + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + (cy_chip_offset[chip] << index); + + tmp = readb(base_addr + (CyRTPR << index)); + return put_user(tmp, value); + } + return 0; +} /* get_timeout */ + +static int set_default_timeout(struct cyclades_port *info, unsigned long value) +{ + info->default_timeout = value & 0xff; + return 0; +} /* set_default_timeout */ + +static int get_default_timeout(struct cyclades_port *info, + unsigned long __user *value) +{ + return put_user(info->default_timeout, value); +} /* get_default_timeout */ + +/* + * This routine allows the tty driver to implement device- + * specific ioctl's. If the ioctl number passed in cmd is + * not recognized by the driver, it should return ENOIOCTLCMD. + */ +static int +cy_ioctl(struct tty_struct *tty, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_icount cprev, cnow; /* kernel counter temps */ + struct serial_icounter_struct __user *p_cuser; /* user space */ + int ret_val = 0; + unsigned long flags; + void __user *argp = (void __user *)arg; + + if (serial_paranoia_check(info, tty->name, "cy_ioctl")) + return -ENODEV; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", + info->line, cmd, arg); +#endif + lock_kernel(); + + switch (cmd) { + case CYGETMON: + ret_val = get_mon_info(info, argp); + break; + case CYGETTHRESH: + ret_val = get_threshold(info, argp); + break; + case CYSETTHRESH: + ret_val = set_threshold(info, arg); + break; + case CYGETDEFTHRESH: + ret_val = get_default_threshold(info, argp); + break; + case CYSETDEFTHRESH: + ret_val = set_default_threshold(info, arg); + break; + case CYGETTIMEOUT: + ret_val = get_timeout(info, argp); + break; + case CYSETTIMEOUT: + ret_val = set_timeout(info, arg); + break; + case CYGETDEFTIMEOUT: + ret_val = get_default_timeout(info, argp); + break; + case CYSETDEFTIMEOUT: + ret_val = set_default_timeout(info, arg); + break; + case CYSETRFLOW: + info->rflow = (int)arg; + ret_val = 0; + break; + case CYGETRFLOW: + ret_val = info->rflow; + break; + case CYSETRTSDTR_INV: + info->rtsdtr_inv = (int)arg; + ret_val = 0; + break; + case CYGETRTSDTR_INV: + ret_val = info->rtsdtr_inv; + break; + case CYGETCD1400VER: + ret_val = info->chip_rev; + break; +#ifndef CONFIG_CYZ_INTR + case CYZSETPOLLCYCLE: + cyz_polling_cycle = (arg * HZ) / 1000; + ret_val = 0; + break; + case CYZGETPOLLCYCLE: + ret_val = (cyz_polling_cycle * 1000) / HZ; + break; +#endif /* CONFIG_CYZ_INTR */ + case CYSETWAIT: + info->port.closing_wait = (unsigned short)arg * HZ / 100; + ret_val = 0; + break; + case CYGETWAIT: + ret_val = info->port.closing_wait / (HZ / 100); + break; + case TIOCGSERIAL: + ret_val = get_serial_info(info, argp); + break; + case TIOCSSERIAL: + ret_val = set_serial_info(info, argp); + break; + case TIOCSERGETLSR: /* Get line status register */ + ret_val = get_lsr_info(info, argp); + break; + /* + * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change + * - mask passed in arg for lines of interest + * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) + * Caller should use TIOCGICOUNT to see which one it was + */ + case TIOCMIWAIT: + spin_lock_irqsave(&info->card->card_lock, flags); + /* note the counters on entry */ + cnow = info->icount; + spin_unlock_irqrestore(&info->card->card_lock, flags); + ret_val = wait_event_interruptible(info->delta_msr_wait, ({ + cprev = cnow; + spin_lock_irqsave(&info->card->card_lock, flags); + cnow = info->icount; /* atomic copy */ + spin_unlock_irqrestore(&info->card->card_lock, flags); + + ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || + ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || + ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || + ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)); + })); + break; + + /* + * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) + * Return: write counters to the user passed counter struct + * NB: both 1->0 and 0->1 transitions are counted except for + * RI where only 0->1 is counted. + */ + case TIOCGICOUNT: + spin_lock_irqsave(&info->card->card_lock, flags); + cnow = info->icount; + spin_unlock_irqrestore(&info->card->card_lock, flags); + p_cuser = argp; + ret_val = put_user(cnow.cts, &p_cuser->cts); + if (ret_val) + break; + ret_val = put_user(cnow.dsr, &p_cuser->dsr); + if (ret_val) + break; + ret_val = put_user(cnow.rng, &p_cuser->rng); + if (ret_val) + break; + ret_val = put_user(cnow.dcd, &p_cuser->dcd); + if (ret_val) + break; + ret_val = put_user(cnow.rx, &p_cuser->rx); + if (ret_val) + break; + ret_val = put_user(cnow.tx, &p_cuser->tx); + if (ret_val) + break; + ret_val = put_user(cnow.frame, &p_cuser->frame); + if (ret_val) + break; + ret_val = put_user(cnow.overrun, &p_cuser->overrun); + if (ret_val) + break; + ret_val = put_user(cnow.parity, &p_cuser->parity); + if (ret_val) + break; + ret_val = put_user(cnow.brk, &p_cuser->brk); + if (ret_val) + break; + ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun); + if (ret_val) + break; + ret_val = 0; + break; + default: + ret_val = -ENOIOCTLCMD; + } + unlock_kernel(); + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_ioctl done\n"); +#endif + return ret_val; +} /* cy_ioctl */ + +/* + * This routine allows the tty driver to be notified when + * device's termios settings have changed. Note that a + * well-designed tty driver should be prepared to accept the case + * where old == NULL, and try to do something rational. + */ +static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) +{ + struct cyclades_port *info = tty->driver_data; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line); +#endif + + set_line_char(info); + + if ((old_termios->c_cflag & CRTSCTS) && + !(tty->termios->c_cflag & CRTSCTS)) { + tty->hw_stopped = 0; + cy_start(tty); + } +#if 0 + /* + * No need to wake up processes in open wait, since they + * sample the CLOCAL flag once, and don't recheck it. + * XXX It's not clear whether the current behavior is correct + * or not. Hence, this may change..... + */ + if (!(old_termios->c_cflag & CLOCAL) && + (tty->termios->c_cflag & CLOCAL)) + wake_up_interruptible(&info->port.open_wait); +#endif +} /* cy_set_termios */ + +/* This function is used to send a high-priority XON/XOFF character to + the device. +*/ +static void cy_send_xchar(struct tty_struct *tty, char ch) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + int channel; + + if (serial_paranoia_check(info, tty->name, "cy_send_xchar")) + return; + + info->x_char = ch; + + if (ch) + cy_start(tty); + + card = info->card; + channel = info->line - card->first_line; + + if (IS_CYC_Z(*card)) { + if (ch == STOP_CHAR(tty)) + cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L); + else if (ch == START_CHAR(tty)) + cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L); + } +} + +/* This routine is called by the upper-layer tty layer to signal + that incoming characters should be throttled because the input + buffers are close to full. + */ +static void cy_throttle(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + unsigned long flags; + void __iomem *base_addr; + int chip, channel, index; + +#ifdef CY_DEBUG_THROTTLE + char buf[64]; + + printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf), + tty->ldisc.chars_in_buffer(tty), info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_throttle")) + return; + + card = info->card; + + if (I_IXOFF(tty)) { + if (!IS_CYC_Z(*card)) + cy_send_xchar(tty, STOP_CHAR(tty)); + else + info->throttle = 1; + } + + if (tty->termios->c_cflag & CRTSCTS) { + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR2 << index), + ~CyDTR); + } else { + cy_writeb(base_addr + (CyMSVR1 << index), + ~CyRTS); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } else { + info->throttle = 1; + } + } +} /* cy_throttle */ + +/* + * This routine notifies the tty driver that it should signal + * that characters can now be sent to the tty without fear of + * overrunning the input buffers of the line disciplines. + */ +static void cy_unthrottle(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + struct cyclades_card *card; + unsigned long flags; + void __iomem *base_addr; + int chip, channel, index; + +#ifdef CY_DEBUG_THROTTLE + char buf[64]; + + printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n", + tty_name(tty, buf), tty_chars_in_buffer(tty), info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) + return; + + if (I_IXOFF(tty)) { + if (info->x_char) + info->x_char = 0; + else + cy_send_xchar(tty, START_CHAR(tty)); + } + + if (tty->termios->c_cflag & CRTSCTS) { + card = info->card; + channel = info->line - card->first_line; + if (!IS_CYC_Z(*card)) { + chip = channel >> 2; + channel &= 0x03; + index = card->bus_index; + base_addr = card->base_addr + + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&card->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) channel); + if (info->rtsdtr_inv) { + cy_writeb(base_addr + (CyMSVR2 << index), + CyDTR); + } else { + cy_writeb(base_addr + (CyMSVR1 << index), + CyRTS); + } + spin_unlock_irqrestore(&card->card_lock, flags); + } else { + info->throttle = 0; + } + } +} /* cy_unthrottle */ + +/* 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 = tty->driver_data; + void __iomem *base_addr; + int chip, channel, index; + unsigned long flags; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_stop")) + return; + + cinfo = info->card; + channel = info->line - cinfo->first_line; + if (!IS_CYC_Z(*cinfo)) { + index = cinfo->bus_index; + chip = channel >> 2; + channel &= 0x03; + base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&cinfo->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char)(channel & 0x0003)); /* index channel */ + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) & ~CyTxRdy); + spin_unlock_irqrestore(&cinfo->card_lock, flags); + } +} /* cy_stop */ + +static void cy_start(struct tty_struct *tty) +{ + struct cyclades_card *cinfo; + struct cyclades_port *info = tty->driver_data; + void __iomem *base_addr; + int chip, channel, index; + unsigned long flags; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_start")) + return; + + cinfo = info->card; + channel = info->line - cinfo->first_line; + index = cinfo->bus_index; + if (!IS_CYC_Z(*cinfo)) { + chip = channel >> 2; + channel &= 0x03; + base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index); + + spin_lock_irqsave(&cinfo->card_lock, flags); + cy_writeb(base_addr + (CyCAR << index), + (u_char) (channel & 0x0003)); /* index channel */ + cy_writeb(base_addr + (CySRER << index), + readb(base_addr + (CySRER << index)) | CyTxRdy); + spin_unlock_irqrestore(&cinfo->card_lock, flags); + } +} /* cy_start */ + +/* + * cy_hangup() --- called by tty_hangup() when a hangup is signaled. + */ +static void cy_hangup(struct tty_struct *tty) +{ + struct cyclades_port *info = tty->driver_data; + +#ifdef CY_DEBUG_OTHER + printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line); +#endif + + if (serial_paranoia_check(info, tty->name, "cy_hangup")) + return; + + cy_flush_buffer(tty); + shutdown(info); + info->port.count = 0; +#ifdef CY_DEBUG_COUNT + printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n", + current->pid); +#endif + info->port.tty = NULL; + info->port.flags &= ~ASYNC_NORMAL_ACTIVE; + wake_up_interruptible(&info->port.open_wait); +} /* cy_hangup */ + +/* + * --------------------------------------------------------------------- + * cy_init() and friends + * + * cy_init() is called at boot-time to initialize the serial driver. + * --------------------------------------------------------------------- + */ + +static int __devinit cy_init_card(struct cyclades_card *cinfo) +{ + struct cyclades_port *info; + u32 uninitialized_var(mailbox); + unsigned int nports, port; + unsigned short chip_number; + int uninitialized_var(index); + + spin_lock_init(&cinfo->card_lock); + + if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */ + mailbox = readl(&((struct RUNTIME_9060 __iomem *) + cinfo->ctl_addr)->mail_box_0); + nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8; + cinfo->intr_enabled = 0; + cinfo->nports = 0; /* Will be correctly set later, after + Z FW is loaded */ + } else { + index = cinfo->bus_index; + nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips; + } + + cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL); + if (cinfo->ports == NULL) { + printk(KERN_ERR "Cyclades: cannot allocate ports\n"); + cinfo->nports = 0; + return -ENOMEM; + } + + for (port = cinfo->first_line; port < cinfo->first_line + nports; + port++) { + info = &cinfo->ports[port - cinfo->first_line]; + tty_port_init(&info->port); + info->magic = CYCLADES_MAGIC; + info->card = cinfo; + info->line = port; + + info->port.closing_wait = CLOSING_WAIT_DELAY; + info->port.close_delay = 5 * HZ / 10; + info->port.flags = STD_COM_FLAGS; + init_completion(&info->shutdown_wait); + init_waitqueue_head(&info->delta_msr_wait); + + if (IS_CYC_Z(*cinfo)) { + info->type = PORT_STARTECH; + if (mailbox == ZO_V1) + info->xmit_fifo_size = CYZ_FIFO_SIZE; + else + info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE; +#ifdef CONFIG_CYZ_INTR + setup_timer(&cyz_rx_full_timer[port], + cyz_rx_restart, (unsigned long)info); +#endif + } else { + info->type = PORT_CIRRUS; + info->xmit_fifo_size = CyMAX_CHAR_FIFO; + info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS; + info->cor2 = CyETC; + info->cor3 = 0x08; /* _very_ small rcv threshold */ + + chip_number = (port - cinfo->first_line) / 4; + info->chip_rev = readb(cinfo->base_addr + + (cy_chip_offset[chip_number] << index) + + (CyGFRCR << index)); + + if (info->chip_rev >= CD1400_REV_J) { + /* It is a CD1400 rev. J or later */ + info->tbpr = baud_bpr_60[13]; /* Tx BPR */ + info->tco = baud_co_60[13]; /* Tx CO */ + info->rbpr = baud_bpr_60[13]; /* Rx BPR */ + info->rco = baud_co_60[13]; /* Rx CO */ + info->rtsdtr_inv = 1; + } else { + info->tbpr = baud_bpr_25[13]; /* Tx BPR */ + info->tco = baud_co_25[13]; /* Tx CO */ + info->rbpr = baud_bpr_25[13]; /* Rx BPR */ + info->rco = baud_co_25[13]; /* Rx CO */ + info->rtsdtr_inv = 0; + } + info->read_status_mask = CyTIMEOUT | CySPECHAR | + CyBREAK | CyPARITY | CyFRAME | CyOVERRUN; + } + + } + +#ifndef CONFIG_CYZ_INTR + if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) { + mod_timer(&cyz_timerlist, jiffies + 1); +#ifdef CY_PCI_DEBUG + printk(KERN_DEBUG "Cyclades-Z polling initialized\n"); +#endif + } +#endif + return 0; +} + +/* initialize chips on Cyclom-Y card -- return number of valid + chips (which is number of ports/4) */ +static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr, + int index) +{ + unsigned int chip_number; + void __iomem *base_addr; + + cy_writeb(true_base_addr + (Cy_HwReset << index), 0); + /* Cy_HwReset is 0x1400 */ + cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0); + /* Cy_ClrIntr is 0x1800 */ + udelay(500L); + + for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; + chip_number++) { + base_addr = + true_base_addr + (cy_chip_offset[chip_number] << index); + mdelay(1); + if (readb(base_addr + (CyCCR << index)) != 0x00) { + /************* + printk(" chip #%d at %#6lx is never idle (CCR != 0)\n", + chip_number, (unsigned long)base_addr); + *************/ + return chip_number; + } + + cy_writeb(base_addr + (CyGFRCR << index), 0); + udelay(10L); + + /* The Cyclom-16Y does not decode address bit 9 and therefore + cannot distinguish between references to chip 0 and a non- + existent chip 4. If the preceding clearing of the supposed + chip 4 GFRCR register appears at chip 0, there is no chip 4 + and this must be a Cyclom-16Y, not a Cyclom-32Ye. + */ + if (chip_number == 4 && readb(true_base_addr + + (cy_chip_offset[0] << index) + + (CyGFRCR << index)) == 0) { + return chip_number; + } + + cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET); + mdelay(1); + + if (readb(base_addr + (CyGFRCR << index)) == 0x00) { + /* + printk(" chip #%d at %#6lx is not responding ", + chip_number, (unsigned long)base_addr); + printk("(GFRCR stayed 0)\n", + */ + return chip_number; + } + if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) != + 0x40) { + /* + printk(" chip #%d at %#6lx is not valid (GFRCR == " + "%#2x)\n", + chip_number, (unsigned long)base_addr, + base_addr[CyGFRCR<<index]); + */ + return chip_number; + } + cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL); + if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) { + /* It is a CD1400 rev. J or later */ + /* Impossible to reach 5ms with this chip. + Changed to 2ms instead (f = 500 Hz). */ + cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS); + } else { + /* f = 200 Hz */ + cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS); + } + + /* + printk(" chip #%d at %#6lx is rev 0x%2x\n", + chip_number, (unsigned long)base_addr, + readb(base_addr+(CyGFRCR<<index))); + */ + } + return chip_number; +} /* cyy_init_card */ + +/* + * --------------------------------------------------------------------- + * cy_detect_isa() - Probe for Cyclom-Y/ISA boards. + * sets global variables and return the number of ISA boards found. + * --------------------------------------------------------------------- + */ +static int __init cy_detect_isa(void) +{ +#ifdef CONFIG_ISA + unsigned short cy_isa_irq, nboard; + void __iomem *cy_isa_address; + unsigned short i, j, cy_isa_nchan; +#ifdef MODULE + int isparam = 0; +#endif + + nboard = 0; + +#ifdef MODULE + /* Check for module parameters */ + for (i = 0; i < NR_CARDS; i++) { + if (maddr[i] || i) { + isparam = 1; + cy_isa_addresses[i] = maddr[i]; + } + if (!maddr[i]) + break; + } +#endif + + /* scan the address table probing for Cyclom-Y/ISA boards */ + for (i = 0; i < NR_ISA_ADDRS; i++) { + unsigned int isa_address = cy_isa_addresses[i]; + if (isa_address == 0x0000) + return nboard; + + /* probe for CD1400... */ + cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin); + if (cy_isa_address == NULL) { + printk(KERN_ERR "Cyclom-Y/ISA: can't remap base " + "address\n"); + continue; + } + cy_isa_nchan = CyPORTS_PER_CHIP * + cyy_init_card(cy_isa_address, 0); + if (cy_isa_nchan == 0) { + iounmap(cy_isa_address); + continue; + } +#ifdef MODULE + if (isparam && irq[i]) + cy_isa_irq = irq[i]; + else +#endif + /* find out the board's irq by probing */ + cy_isa_irq = detect_isa_irq(cy_isa_address); + if (cy_isa_irq == 0) { + printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the " + "IRQ could not be detected.\n", + (unsigned long)cy_isa_address); + iounmap(cy_isa_address); + continue; + } + + if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) { + printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " + "more channels are available. Change NR_PORTS " + "in cyclades.c and recompile kernel.\n", + (unsigned long)cy_isa_address); + iounmap(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 == NULL) + break; + } + if (j == NR_CARDS) { /* no more cy_cards available */ + printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no " + "more cards can be used. Change NR_CARDS in " + "cyclades.c and recompile kernel.\n", + (unsigned long)cy_isa_address); + iounmap(cy_isa_address); + return nboard; + } + + /* allocate IRQ */ + if (request_irq(cy_isa_irq, cyy_interrupt, + IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) { + printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but " + "could not allocate IRQ#%d.\n", + (unsigned long)cy_isa_address, cy_isa_irq); + iounmap(cy_isa_address); + return nboard; + } + + /* set cy_card */ + cy_card[j].base_addr = cy_isa_address; + cy_card[j].ctl_addr = NULL; + 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; + if (cy_init_card(&cy_card[j])) { + cy_card[j].base_addr = NULL; + free_irq(cy_isa_irq, &cy_card[j]); + iounmap(cy_isa_address); + continue; + } + nboard++; + + printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: " + "%d channels starting from port %d\n", + j + 1, (unsigned long)cy_isa_address, + (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), + cy_isa_irq, cy_isa_nchan, cy_next_channel); + + for (j = cy_next_channel; + j < cy_next_channel + cy_isa_nchan; j++) + tty_register_device(cy_serial_driver, j, NULL); + cy_next_channel += cy_isa_nchan; + } + return nboard; +#else + return 0; +#endif /* CONFIG_ISA */ +} /* cy_detect_isa */ + +#ifdef CONFIG_PCI +static inline int __devinit cyc_isfwstr(const char *str, unsigned int size) +{ + unsigned int a; + + for (a = 0; a < size && *str; a++, str++) + if (*str & 0x80) + return -EINVAL; + + for (; a < size; a++, str++) + if (*str) + return -EINVAL; + + return 0; +} + +static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data, + unsigned int size) +{ + for (; size > 0; size--) { + cy_writel(fpga, *data++); + udelay(10); + } +} + +static void __devinit plx_init(struct pci_dev *pdev, int irq, + struct RUNTIME_9060 __iomem *addr) +{ + /* Reset PLX */ + cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000); + udelay(100L); + cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000); + + /* Reload Config. Registers from EEPROM */ + cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000); + udelay(100L); + cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000); + + /* For some yet unknown reason, once the PLX9060 reloads the EEPROM, + * the IRQ is lost and, thus, we have to re-write it to the PCI config. + * registers. This will remain here until we find a permanent fix. + */ + pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq); +} + +static int __devinit __cyz_load_fw(const struct firmware *fw, + const char *name, const u32 mailbox, void __iomem *base, + void __iomem *fpga) +{ + const void *ptr = fw->data; + const struct zfile_header *h = ptr; + const struct zfile_config *c, *cs; + const struct zfile_block *b, *bs; + unsigned int a, tmp, len = fw->size; +#define BAD_FW KERN_ERR "Bad firmware: " + if (len < sizeof(*h)) { + printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h)); + return -EINVAL; + } + + cs = ptr + h->config_offset; + bs = ptr + h->block_offset; + + if ((void *)(cs + h->n_config) > ptr + len || + (void *)(bs + h->n_blocks) > ptr + len) { + printk(BAD_FW "too short"); + return -EINVAL; + } + + if (cyc_isfwstr(h->name, sizeof(h->name)) || + cyc_isfwstr(h->date, sizeof(h->date))) { + printk(BAD_FW "bad formatted header string\n"); + return -EINVAL; + } + + if (strncmp(name, h->name, sizeof(h->name))) { + printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name); + return -EINVAL; + } + + tmp = 0; + for (c = cs; c < cs + h->n_config; c++) { + for (a = 0; a < c->n_blocks; a++) + if (c->block_list[a] > h->n_blocks) { + printk(BAD_FW "bad block ref number in cfgs\n"); + return -EINVAL; + } + if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */ + tmp++; + } + if (!tmp) { + printk(BAD_FW "nothing appropriate\n"); + return -EINVAL; + } + + for (b = bs; b < bs + h->n_blocks; b++) + if (b->file_offset + b->size > len) { + printk(BAD_FW "bad block data offset\n"); + return -EINVAL; + } + + /* everything is OK, let's seek'n'load it */ + for (c = cs; c < cs + h->n_config; c++) + if (c->mailbox == mailbox && c->function == 0) + break; + + for (a = 0; a < c->n_blocks; a++) { + b = &bs[c->block_list[a]]; + if (b->type == ZBLOCK_FPGA) { + if (fpga != NULL) + cyz_fpga_copy(fpga, ptr + b->file_offset, + b->size); + } else { + if (base != NULL) + memcpy_toio(base + b->ram_offset, + ptr + b->file_offset, b->size); + } + } +#undef BAD_FW + return 0; +} + +static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr, + struct RUNTIME_9060 __iomem *ctl_addr, int irq) +{ + const struct firmware *fw; + struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS; + struct CUSTOM_REG __iomem *cust = base_addr; + struct ZFW_CTRL __iomem *pt_zfwctrl; + void __iomem *tmp; + u32 mailbox, status; + unsigned int i; + int retval; + + retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev); + if (retval) { + dev_err(&pdev->dev, "can't get firmware\n"); + goto err; + } + + /* Check whether the firmware is already loaded and running. If + positive, skip this board */ + if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) { + u32 cntval = readl(base_addr + 0x190); + + udelay(100); + if (cntval != readl(base_addr + 0x190)) { + /* FW counter is working, FW is running */ + dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. " + "Skipping board.\n"); + retval = 0; + goto err_rel; + } + } + + /* start boot */ + cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) & + ~0x00030800UL); + + mailbox = readl(&ctl_addr->mail_box_0); + + if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) { + /* stops CPU and set window to beginning of RAM */ + cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); + cy_writel(&cust->cpu_stop, 0); + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); + udelay(100); + } + + plx_init(pdev, irq, ctl_addr); + + if (mailbox != 0) { + /* load FPGA */ + retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL, + base_addr); + if (retval) + goto err_rel; + if (!Z_FPGA_LOADED(ctl_addr)) { + dev_err(&pdev->dev, "fw upload successful, but fw is " + "not loaded\n"); + goto err_rel; + } + } + + /* stops CPU and set window to beginning of RAM */ + cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); + cy_writel(&cust->cpu_stop, 0); + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); + udelay(100); + + /* clear memory */ + for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) + cy_writeb(tmp, 255); + if (mailbox != 0) { + /* set window to last 512K of RAM */ + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE); + for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++) + cy_writeb(tmp, 255); + /* set window to beginning of RAM */ + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); + } + + retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL); + release_firmware(fw); + if (retval) + goto err; + + /* finish boot and start boards */ + cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); + cy_writel(&cust->cpu_start, 0); + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); + i = 0; + while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40) + msleep(100); + if (status != ZFIRM_ID) { + if (status == ZFIRM_HLT) { + dev_err(&pdev->dev, "you need an external power supply " + "for this number of ports. Firmware halted and " + "board reset.\n"); + retval = -EIO; + goto err; + } + dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting " + "some more time\n", status); + while ((status = readl(&fid->signature)) != ZFIRM_ID && + i++ < 200) + msleep(100); + if (status != ZFIRM_ID) { + dev_err(&pdev->dev, "Board not started in 20 seconds! " + "Giving up. (fid->signature = 0x%x)\n", + status); + dev_info(&pdev->dev, "*** Warning ***: if you are " + "upgrading the FW, please power cycle the " + "system before loading the new FW to the " + "Cyclades-Z.\n"); + + if (Z_FPGA_LOADED(ctl_addr)) + plx_init(pdev, irq, ctl_addr); + + retval = -EIO; + goto err; + } + dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n", + i / 10); + } + pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr); + + dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n", + base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr), + base_addr + readl(&fid->zfwctrl_addr)); + + dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n", + readl(&pt_zfwctrl->board_ctrl.fw_version), + readl(&pt_zfwctrl->board_ctrl.n_channel)); + + if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) { + dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please " + "check the connection between the Z host card and the " + "serial expanders.\n"); + + if (Z_FPGA_LOADED(ctl_addr)) + plx_init(pdev, irq, ctl_addr); + + dev_info(&pdev->dev, "Null number of ports detected. Board " + "reset.\n"); + retval = 0; + goto err; + } + + cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX); + cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION); + + /* + Early firmware failed to start looking for commands. + This enables firmware interrupts for those commands. + */ + cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | + (1 << 17)); + cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) | + 0x00030800UL); + + plx_init(pdev, irq, ctl_addr); + + return 0; +err_rel: + release_firmware(fw); +err: + return retval; +} + +static int __devinit cy_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *ent) +{ + void __iomem *addr0 = NULL, *addr2 = NULL; + char *card_name = NULL; + u32 mailbox; + unsigned int device_id, nchan = 0, card_no, i; + unsigned char plx_ver; + int retval, irq; + + retval = pci_enable_device(pdev); + if (retval) { + dev_err(&pdev->dev, "cannot enable device\n"); + goto err; + } + + /* read PCI configuration area */ + irq = pdev->irq; + device_id = pdev->device & ~PCI_DEVICE_ID_MASK; + +#if defined(__alpha__) + if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */ + dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low " + "addresses on Alpha systems.\n"); + retval = -EIO; + goto err_dis; + } +#endif + if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) { + dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low " + "addresses\n"); + retval = -EIO; + goto err_dis; + } + + if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) { + dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring " + "it...\n"); + pdev->resource[2].flags &= ~IORESOURCE_IO; + } + + retval = pci_request_regions(pdev, "cyclades"); + if (retval) { + dev_err(&pdev->dev, "failed to reserve resources\n"); + goto err_dis; + } + + retval = -EIO; + if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || + device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { + card_name = "Cyclom-Y"; + + addr0 = ioremap_nocache(pci_resource_start(pdev, 0), + CyPCI_Yctl); + if (addr0 == NULL) { + dev_err(&pdev->dev, "can't remap ctl region\n"); + goto err_reg; + } + addr2 = ioremap_nocache(pci_resource_start(pdev, 2), + CyPCI_Ywin); + if (addr2 == NULL) { + dev_err(&pdev->dev, "can't remap base region\n"); + goto err_unmap; + } + + nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1); + if (nchan == 0) { + dev_err(&pdev->dev, "Cyclom-Y PCI host card with no " + "Serial-Modules\n"); + return -EIO; + } + } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) { + struct RUNTIME_9060 __iomem *ctl_addr; + + ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0), + CyPCI_Zctl); + if (addr0 == NULL) { + dev_err(&pdev->dev, "can't remap ctl region\n"); + goto err_reg; + } + + /* Disable interrupts on the PLX before resetting it */ + cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900); + + plx_init(pdev, irq, addr0); + + mailbox = (u32)readl(&ctl_addr->mail_box_0); + + addr2 = ioremap_nocache(pci_resource_start(pdev, 2), + mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin); + if (addr2 == NULL) { + dev_err(&pdev->dev, "can't remap base region\n"); + goto err_unmap; + } + + if (mailbox == ZE_V1) { + card_name = "Cyclades-Ze"; + + readl(&ctl_addr->mail_box_0); + nchan = ZE_V1_NPORTS; + } else { + card_name = "Cyclades-8Zo"; + +#ifdef CY_PCI_DEBUG + if (mailbox == ZO_V1) { + cy_writel(&ctl_addr->loc_addr_base, WIN_CREG); + dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA " + "id %lx, ver %lx\n", (ulong)(0xff & + readl(&((struct CUSTOM_REG *)addr2)-> + fpga_id)), (ulong)(0xff & + readl(&((struct CUSTOM_REG *)addr2)-> + fpga_version))); + cy_writel(&ctl_addr->loc_addr_base, WIN_RAM); + } else { + dev_info(&pdev->dev, "Cyclades-Z/PCI: New " + "Cyclades-Z board. FPGA not loaded\n"); + } +#endif + /* The following clears the firmware id word. This + ensures that the driver will not attempt to talk to + the board until it has been properly initialized. + */ + if ((mailbox == ZO_V1) || (mailbox == ZO_V2)) + cy_writel(addr2 + ID_ADDRESS, 0L); + + retval = cyz_load_fw(pdev, addr2, addr0, irq); + if (retval) + goto err_unmap; + /* This must be a Cyclades-8Zo/PCI. The extendable + version will have a different device_id and will + be allocated its maximum number of ports. */ + nchan = 8; + } + } + + if ((cy_next_channel + nchan) > NR_PORTS) { + dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " + "channels are available. Change NR_PORTS in " + "cyclades.c and recompile kernel.\n"); + goto err_unmap; + } + /* fill the next cy_card structure available */ + for (card_no = 0; card_no < NR_CARDS; card_no++) { + if (cy_card[card_no].base_addr == NULL) + break; + } + if (card_no == NR_CARDS) { /* no more cy_cards available */ + dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no " + "more cards can be used. Change NR_CARDS in " + "cyclades.c and recompile kernel.\n"); + goto err_unmap; + } + + if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || + device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { + /* allocate IRQ */ + retval = request_irq(irq, cyy_interrupt, + IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]); + if (retval) { + dev_err(&pdev->dev, "could not allocate IRQ\n"); + goto err_unmap; + } + cy_card[card_no].num_chips = nchan / 4; + } else { +#ifdef CONFIG_CYZ_INTR + /* allocate IRQ only if board has an IRQ */ + if (irq != 0 && irq != 255) { + retval = request_irq(irq, cyz_interrupt, + IRQF_SHARED, "Cyclades-Z", + &cy_card[card_no]); + if (retval) { + dev_err(&pdev->dev, "could not allocate IRQ\n"); + goto err_unmap; + } + } +#endif /* CONFIG_CYZ_INTR */ + cy_card[card_no].num_chips = (unsigned int)-1; + } + + /* set cy_card */ + cy_card[card_no].base_addr = addr2; + cy_card[card_no].ctl_addr = addr0; + cy_card[card_no].irq = irq; + cy_card[card_no].bus_index = 1; + cy_card[card_no].first_line = cy_next_channel; + retval = cy_init_card(&cy_card[card_no]); + if (retval) + goto err_null; + + pci_set_drvdata(pdev, &cy_card[card_no]); + + if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || + device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { + /* enable interrupts in the PCI interface */ + plx_ver = readb(addr2 + CyPLX_VER) & 0x0f; + switch (plx_ver) { + case PLX_9050: + + cy_writeb(addr0 + 0x4c, 0x43); + break; + + case PLX_9060: + case PLX_9080: + default: /* Old boards, use PLX_9060 */ + plx_init(pdev, irq, addr0); + cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900); + break; + } + } + + dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from " + "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel); + for (i = cy_next_channel; i < cy_next_channel + nchan; i++) + tty_register_device(cy_serial_driver, i, &pdev->dev); + cy_next_channel += nchan; + + return 0; +err_null: + cy_card[card_no].base_addr = NULL; + free_irq(irq, &cy_card[card_no]); +err_unmap: + iounmap(addr0); + if (addr2) + iounmap(addr2); +err_reg: + pci_release_regions(pdev); +err_dis: + pci_disable_device(pdev); +err: + return retval; +} + +static void __devexit cy_pci_remove(struct pci_dev *pdev) +{ + struct cyclades_card *cinfo = pci_get_drvdata(pdev); + unsigned int i; + + /* non-Z with old PLX */ + if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) == + PLX_9050) + cy_writeb(cinfo->ctl_addr + 0x4c, 0); + else +#ifndef CONFIG_CYZ_INTR + if (!IS_CYC_Z(*cinfo)) +#endif + cy_writew(cinfo->ctl_addr + 0x68, + readw(cinfo->ctl_addr + 0x68) & ~0x0900); + + iounmap(cinfo->base_addr); + if (cinfo->ctl_addr) + iounmap(cinfo->ctl_addr); + if (cinfo->irq +#ifndef CONFIG_CYZ_INTR + && !IS_CYC_Z(*cinfo) +#endif /* CONFIG_CYZ_INTR */ + ) + free_irq(cinfo->irq, cinfo); + pci_release_regions(pdev); + + cinfo->base_addr = NULL; + for (i = cinfo->first_line; i < cinfo->first_line + + cinfo->nports; i++) + tty_unregister_device(cy_serial_driver, i); + cinfo->nports = 0; + kfree(cinfo->ports); +} + +static struct pci_driver cy_pci_driver = { + .name = "cyclades", + .id_table = cy_pci_dev_id, + .probe = cy_pci_probe, + .remove = __devexit_p(cy_pci_remove) +}; +#endif + +static int +cyclades_get_proc_info(char *buf, char **start, off_t offset, int length, + int *eof, void *data) +{ + struct cyclades_port *info; + unsigned int i, j; + int len = 0; + off_t begin = 0; + off_t pos = 0; + int size; + __u32 cur_jifs = jiffies; + + size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn " + "IdleIn Overruns Ldisc\n"); + + pos += size; + len += size; + + /* Output one line for each known port */ + for (i = 0; i < NR_CARDS; i++) + for (j = 0; j < cy_card[i].nports; j++) { + info = &cy_card[i].ports[j]; + + if (info->port.count) + size = sprintf(buf + len, "%3d %8lu %10lu %8lu " + "%10lu %8lu %9lu %6ld\n", info->line, + (cur_jifs - info->idle_stats.in_use) / + HZ, info->idle_stats.xmit_bytes, + (cur_jifs - info->idle_stats.xmit_idle)/ + HZ, info->idle_stats.recv_bytes, + (cur_jifs - info->idle_stats.recv_idle)/ + HZ, info->idle_stats.overruns, + /* FIXME: double check locking */ + (long)info->port.tty->ldisc.ops->num); + else + size = sprintf(buf + len, "%3d %8lu %10lu %8lu " + "%10lu %8lu %9lu %6ld\n", + info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L); + len += size; + pos = begin + len; + + if (pos < offset) { + len = 0; + begin = pos; + } + if (pos > offset + length) + goto done; + } + *eof = 1; +done: + *start = buf + (offset - begin); /* Start of wanted data */ + len -= (offset - begin); /* Start slop */ + if (len > length) + len = length; /* Ending slop */ + if (len < 0) + len = 0; + return len; +} + +/* The serial driver boot-time initialization code! + Hardware I/O ports are mapped to character special devices on a + first found, first allocated manner. That is, this code searches + for Cyclom cards in the system. As each is found, it is probed + to discover how many chips (and thus how many ports) are present. + These ports are mapped to the tty ports 32 and upward in monotonic + fashion. If an 8-port card is replaced with a 16-port card, the + port mapping on a following card will shift. + + This approach is different from what is used in the other serial + device driver because the Cyclom is more properly a multiplexer, + not just an aggregation of serial ports on one card. + + If there are more cards with more ports than have been + statically allocated above, a warning is printed and the + extra ports are ignored. + */ + +static const struct tty_operations cy_ops = { + .open = cy_open, + .close = cy_close, + .write = cy_write, + .put_char = cy_put_char, + .flush_chars = cy_flush_chars, + .write_room = cy_write_room, + .chars_in_buffer = cy_chars_in_buffer, + .flush_buffer = cy_flush_buffer, + .ioctl = cy_ioctl, + .throttle = cy_throttle, + .unthrottle = cy_unthrottle, + .set_termios = cy_set_termios, + .stop = cy_stop, + .start = cy_start, + .hangup = cy_hangup, + .break_ctl = cy_break, + .wait_until_sent = cy_wait_until_sent, + .read_proc = cyclades_get_proc_info, + .tiocmget = cy_tiocmget, + .tiocmset = cy_tiocmset, +}; + +static int __init cy_init(void) +{ + unsigned int nboards; + int retval = -ENOMEM; + + cy_serial_driver = alloc_tty_driver(NR_PORTS); + if (!cy_serial_driver) + goto err; + + printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n", + __DATE__, __TIME__); + + /* Initialize the tty_driver structure */ + + cy_serial_driver->owner = THIS_MODULE; + cy_serial_driver->driver_name = "cyclades"; + cy_serial_driver->name = "ttyC"; + cy_serial_driver->major = CYCLADES_MAJOR; + cy_serial_driver->minor_start = 0; + cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL; + cy_serial_driver->subtype = SERIAL_TYPE_NORMAL; + cy_serial_driver->init_termios = tty_std_termios; + cy_serial_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + tty_set_operations(cy_serial_driver, &cy_ops); + + retval = tty_register_driver(cy_serial_driver); + if (retval) { + printk(KERN_ERR "Couldn't register Cyclades serial driver\n"); + goto err_frtty; + } + + /* the code below is responsible to find the boards. Each different + type of board has its own detection routine. If a board is found, + the next cy_card structure available is set by the detection + routine. These functions are responsible for checking the + availability of cy_card and cy_port data structures and updating + the cy_next_channel. */ + + /* look for isa boards */ + nboards = cy_detect_isa(); + +#ifdef CONFIG_PCI + /* look for pci boards */ + retval = pci_register_driver(&cy_pci_driver); + if (retval && !nboards) { + tty_unregister_driver(cy_serial_driver); + goto err_frtty; + } +#endif + + return 0; +err_frtty: + put_tty_driver(cy_serial_driver); +err: + return retval; +} /* cy_init */ + +static void __exit cy_cleanup_module(void) +{ + struct cyclades_card *card; + unsigned int i, e1; + +#ifndef CONFIG_CYZ_INTR + del_timer_sync(&cyz_timerlist); +#endif /* CONFIG_CYZ_INTR */ + + e1 = tty_unregister_driver(cy_serial_driver); + if (e1) + printk(KERN_ERR "failed to unregister Cyclades serial " + "driver(%d)\n", e1); + +#ifdef CONFIG_PCI + pci_unregister_driver(&cy_pci_driver); +#endif + + for (i = 0; i < NR_CARDS; i++) { + card = &cy_card[i]; + if (card->base_addr) { + /* clear interrupt */ + cy_writeb(card->base_addr + Cy_ClrIntr, 0); + iounmap(card->base_addr); + if (card->ctl_addr) + iounmap(card->ctl_addr); + if (card->irq +#ifndef CONFIG_CYZ_INTR + && !IS_CYC_Z(*card) +#endif /* CONFIG_CYZ_INTR */ + ) + free_irq(card->irq, card); + for (e1 = card->first_line; e1 < card->first_line + + card->nports; e1++) + tty_unregister_device(cy_serial_driver, e1); + kfree(card->ports); + } + } + + put_tty_driver(cy_serial_driver); +} /* cy_cleanup_module */ + +module_init(cy_init); +module_exit(cy_cleanup_module); + +MODULE_LICENSE("GPL"); +MODULE_VERSION(CY_VERSION); |
