summaryrefslogtreecommitdiff
path: root/drivers/char/cyclades.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/cyclades.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/char/cyclades.c')
-rw-r--r--drivers/char/cyclades.c5540
1 files changed, 5540 insertions, 0 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
new file mode 100644
index 000000000000..6a5337bf0936
--- /dev/null
+++ b/drivers/char/cyclades.c
@@ -0,0 +1,5540 @@
+#undef BLOCKMOVE
+#define Z_WAKE
+#undef Z_EXT_CHARS_IN_BUFFER
+static char rcsid[] =
+"$Revision: 2.3.2.20 $$Date: 2004/02/25 18:14:16 $";
+
+/*
+ * 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>.
+ * Currently maintained by Cyclades team <async@cyclades.com>.
+ *
+ * For Technical support and installation problems, please send e-mail
+ * to support@cyclades.com.
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992 Linus Torvalds. It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ *
+ * This version supports shared IRQ's (only for PCI boards).
+ *
+ * $Log: cyclades.c,v $
+ * 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 explictly
+ * 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
+ *
+ */
+
+/* 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
+
+#if 0
+#define PAUSE __asm__("nop");
+#else
+#define PAUSE ;
+#endif
+
+/*
+ * Include section
+ */
+#include <linux/config.h>
+#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/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 <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#define CY_LOCK(info,flags) \
+ do { \
+ spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
+ } while (0)
+
+#define CY_UNLOCK(info,flags) \
+ do { \
+ spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
+ } while (0)
+
+#include <linux/types.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 == -1)
+
+#define Z_FPGA_CHECK(card) \
+ ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
+ ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
+
+#define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
+ ((card).ctl_addr))->mail_box_0)) || \
+ Z_FPGA_CHECK(card)) && \
+ (ZFIRM_ID==cy_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)
+
+#define JIFFIES_DIFF(n, j) ((j) - (n))
+
+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.
+ The cy_setup function extracts additional addresses from the
+ boot options line. The form is "cyclades=address,address..."
+*/
+
+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 (sizeof(cy_isa_addresses)/sizeof(unsigned char*))
+
+#ifdef MODULE
+static long maddr[NR_CARDS] = { 0, };
+static int irq[NR_CARDS] = { 0, };
+
+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];
+
+/* This is the per-channel data structure containing pointers, flags
+ and variables for the port. This driver supports a maximum of NR_PORTS.
+*/
+static struct cyclades_port cy_port[NR_PORTS];
+
+static int cy_next_channel; /* next minor available */
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write. We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open. This buffer is
+ * allocated when the first cy_open occurs.
+ */
+static unsigned char *tmp_buf;
+
+/*
+ * 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->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 */
+
+static unsigned short cy_pci_nboard;
+static unsigned short cy_isa_nboard;
+static unsigned short cy_nboard;
+#ifdef CONFIG_PCI
+static unsigned short cy_pci_dev_id[] = {
+ PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
+ PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
+ PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
+ PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
+ PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
+ PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
+ PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
+ PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
+ 0 /* end of table */
+ };
+#endif
+
+static void cy_start(struct tty_struct *);
+static void set_line_char(struct cyclades_port *);
+static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
+#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 int cyz_timeron = 0;
+static struct timer_list cyz_timerlist = TIMER_INITIALIZER(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
+ static const char *badmagic =
+ "cyc Warning: bad magic number for serial struct (%s) in %s\n";
+ static const char *badinfo =
+ "cyc Warning: null cyclades_port for (%s) in %s\n";
+ static const char *badrange =
+ "cyc Warning: cyclades_port out of range for (%s) in %s\n";
+
+ if (!info) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+
+ if( (long)info < (long)(&cy_port[0])
+ || (long)(&cy_port[NR_PORTS]) < (long)info ){
+ printk(badrange, name, routine);
+ return 1;
+ }
+
+ if (info->magic != CYCLADES_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+} /* serial_paranoia_check */
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver
+ * (also known as the "bottom half"). This can be called any
+ * number of times for any channel without harm.
+ */
+static inline void
+cy_sched_event(struct cyclades_port *info, int event)
+{
+ info->event |= 1 << event; /* remember what kind of event and who */
+ schedule_work(&info->tqueue);
+} /* cy_sched_event */
+
+
+/*
+ * This routine is used to handle the "bottom half" processing for the
+ * serial driver, known also the "software interrupt" processing.
+ * This processing is done at the kernel interrupt level, after the
+ * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
+ * is where time-consuming activities which can not be done in the
+ * interrupt driver proper are done; the interrupt driver schedules
+ * them using cy_sched_event(), and they get done here.
+ *
+ * This is done through one level of indirection--the task queue.
+ * When a hardware interrupt service routine wants service by the
+ * driver's bottom half, it enqueues the appropriate tq_struct (one
+ * per port) to the keventd work queue and sets a request flag
+ * that the work queue be processed.
+ *
+ * Although this may seem unwieldy, it gives the system a way to
+ * pass an argument (in this case the pointer to the cyclades_port
+ * structure) to the bottom half of the driver. Previous kernels
+ * had to poll every port to see if that port needed servicing.
+ */
+static void
+do_softint(void *private_)
+{
+ struct cyclades_port *info = (struct cyclades_port *) private_;
+ struct tty_struct *tty;
+
+ tty = info->tty;
+ if (!tty)
+ return;
+
+ if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
+ tty_hangup(info->tty);
+ wake_up_interruptible(&info->open_wait);
+ info->flags &= ~ASYNC_NORMAL_ACTIVE;
+ }
+ if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
+ wake_up_interruptible(&info->open_wait);
+ }
+#ifdef CONFIG_CYZ_INTR
+ if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
+ if (cyz_rx_full_timer[info->line].function == NULL) {
+ cyz_rx_full_timer[info->line].expires = jiffies + 1;
+ cyz_rx_full_timer[info->line].function = cyz_rx_restart;
+ cyz_rx_full_timer[info->line].data = (unsigned long)info;
+ add_timer(&cyz_rx_full_timer[info->line]);
+ }
+ }
+#endif
+ if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event)) {
+ wake_up_interruptible(&info->delta_msr_wait);
+ }
+ if (test_and_clear_bit(Cy_EVENT_WRITE_WAKEUP, &info->event)) {
+ tty_wakeup(tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+#ifdef Z_WAKE
+ if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event)) {
+ wake_up_interruptible(&info->shutdown_wait);
+ }
+#endif
+} /* do_softint */
+
+
+/***********************************************************/
+/********* 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)
+{
+ volatile int i;
+
+ /* Check to see that the previous command has completed */
+ for(i = 0 ; i < 100 ; i++){
+ if (cy_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),
+ cy_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) cy_readb(address + (CyTIR<<index));
+ save_car = cy_readb(address + (CyCAR<<index));
+ cy_writeb(address + (CyCAR<<index), (save_xir & 0x3));
+ cy_writeb(address + (CySRER<<index),
+ cy_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 */
+
+/* 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, struct pt_regs *regs)
+{
+ struct tty_struct *tty;
+ int status;
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info;
+ void __iomem *base_addr, *card_base_addr;
+ int chip;
+ int save_xir, channel, save_car;
+ char data;
+ volatile int char_count;
+ int outch;
+ int i,j,index;
+ int too_many;
+ int had_work;
+ int mdm_change;
+ int mdm_status;
+
+ if((cinfo = (struct cyclades_card *)dev_id) == 0){
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
+#endif
+ return IRQ_NONE; /* spurious interrupt */
+ }
+
+ card_base_addr = cinfo->base_addr;
+ index = cinfo->bus_index;
+
+
+ /* This loop checks all chips in the card. Make a note whenever
+ _any_ chip had some work to do, as this is considered an
+ indication that there will be more to do. Only when no chip
+ has any work does this outermost loop exit.
+ */
+ do{
+ had_work = 0;
+ for ( chip = 0 ; chip < cinfo->num_chips ; chip ++) {
+ base_addr = cinfo->base_addr + (cy_chip_offset[chip]<<index);
+ too_many = 0;
+ while ( (status = cy_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;
+ }
+ if (status & CySRReceive) { /* reception interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
+#endif
+ /* determine the channel & change to that context */
+ spin_lock(&cinfo->card_lock);
+ save_xir = (u_char) cy_readb(base_addr+(CyRIR<<index));
+ channel = (u_short ) (save_xir & CyIRChannel);
+ i = channel + chip * 4 + cinfo->first_line;
+ info = &cy_port[i];
+ info->last_active = jiffies;
+ save_car = cy_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->tty == 0){
+ j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
+ if ( j == CyIVRRxEx ) { /* exception */
+ data = cy_readb(base_addr+(CyRDSR<<index));
+ } else { /* normal character reception */
+ char_count = cy_readb(base_addr+(CyRDCR<<index));
+ while(char_count--){
+ data = cy_readb(base_addr+(CyRDSR<<index));
+ }
+ }
+ }else{ /* there is an open port for this data */
+ tty = info->tty;
+ j = (cy_readb(base_addr+(CyRIVR<<index)) & CyIVRMask);
+ if ( j == CyIVRRxEx ) { /* exception */
+ data = cy_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++;
+ continue;
+ }
+ if (tty->flip.count < TTY_FLIPBUF_SIZE){
+ tty->flip.count++;
+ if (data & info->read_status_mask){
+ if(data & CyBREAK){
+ *tty->flip.flag_buf_ptr++ =
+ TTY_BREAK;
+ *tty->flip.char_buf_ptr++ =
+ cy_readb(base_addr+(CyRDSR<<index));
+ info->icount.rx++;
+ if (info->flags & ASYNC_SAK){
+ do_SAK(tty);
+ }
+ }else if(data & CyFRAME){
+ *tty->flip.flag_buf_ptr++ =
+ TTY_FRAME;
+ *tty->flip.char_buf_ptr++ =
+ cy_readb(base_addr+(CyRDSR<<index));
+ info->icount.rx++;
+ info->idle_stats.frame_errs++;
+ }else if(data & CyPARITY){
+ *tty->flip.flag_buf_ptr++ =
+ TTY_PARITY;
+ *tty->flip.char_buf_ptr++ =
+ cy_readb(base_addr+(CyRDSR<<index));
+ info->icount.rx++;
+ info->idle_stats.parity_errs++;
+ }else if(data & CyOVERRUN){
+ *tty->flip.flag_buf_ptr++ =
+ TTY_OVERRUN;
+ *tty->flip.char_buf_ptr++ = 0;
+ info->icount.rx++;
+ /* If the flip buffer itself is
+ overflowing, we still lose
+ the next incoming character.
+ */
+ if(tty->flip.count
+ < TTY_FLIPBUF_SIZE){
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ =
+ TTY_NORMAL;
+ *tty->flip.char_buf_ptr++ =
+ cy_readb(base_addr+(CyRDSR<<index));
+ 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->flip.flag_buf_ptr++ = 0;
+ *tty->flip.char_buf_ptr++ = 0;
+ info->icount.rx++;
+ }
+ }else{
+ *tty->flip.flag_buf_ptr++ = 0;
+ *tty->flip.char_buf_ptr++ = 0;
+ 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 = cy_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
+ while(char_count--){
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE){
+ break;
+ }
+ tty->flip.count++;
+ data = cy_readb(base_addr+(CyRDSR<<index));
+ *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+ *tty->flip.char_buf_ptr++ = data;
+ info->idle_stats.recv_bytes++;
+ info->icount.rx++;
+#ifdef CY_16Y_HACK
+ udelay(10L);
+#endif
+ }
+ info->idle_stats.recv_idle = jiffies;
+ }
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+ /* end of service */
+ cy_writeb(base_addr+(CyRIR<<index), (save_xir & 0x3f));
+ cy_writeb(base_addr+(CyCAR<<index), (save_car));
+ spin_unlock(&cinfo->card_lock);
+ }
+
+
+ if (status & CySRTransmit) { /* transmission interrupt */
+ /* Since we only get here when the transmit buffer
+ is empty, we know we can always stuff a dozen
+ characters. */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
+#endif
+
+ /* determine the channel & change to that context */
+ spin_lock(&cinfo->card_lock);
+ save_xir = (u_char) cy_readb(base_addr+(CyTIR<<index));
+ channel = (u_short ) (save_xir & CyIRChannel);
+ i = channel + chip * 4 + cinfo->first_line;
+ save_car = cy_readb(base_addr+(CyCAR<<index));
+ cy_writeb(base_addr+(CyCAR<<index), save_xir);
+
+ /* validate the port# (as configured and open) */
+ if( (i < 0) || (NR_PORTS <= i) ){
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
+ goto txend;
+ }
+ info = &cy_port[i];
+ info->last_active = jiffies;
+ if(info->tty == 0){
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
+ goto txdone;
+ }
+
+ /* 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 (cy_readb(base_addr+(CySRER<<index))&CyTxMpty) {
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) &
+ ~CyTxMpty);
+ } else {
+ cy_writeb(base_addr+(CySRER<<index),
+ ((cy_readb(base_addr+(CySRER<<index))
+ & ~CyTxRdy)
+ | CyTxMpty));
+ }
+ goto txdone;
+ }
+ if (info->xmit_buf == 0){
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) &
+ ~CyTxRdy);
+ goto txdone;
+ }
+ if (info->tty->stopped || info->tty->hw_stopped){
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) &
+ ~CyTxRdy);
+ goto txdone;
+ }
+ /* Because the Embedded Transmit Commands have
+ been enabled, we must check to see if the
+ escape character, NULL, is being sent. If it
+ is, we must ensure that there is room for it
+ to be doubled in the output stream. Therefore
+ we no longer advance the pointer when the
+ character is fetched, but rather wait until
+ after the check for a NULL output character.
+ This is necessary because there may not be
+ room for the two chars needed to send a NULL.)
+ */
+ outch = info->xmit_buf[info->xmit_tail];
+ if( outch ){
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1)
+ & (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--;
+ }else{
+ }
+ }
+ }
+
+ txdone:
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+ }
+ txend:
+ /* end of service */
+ cy_writeb(base_addr+(CyTIR<<index),
+ (save_xir & 0x3f));
+ cy_writeb(base_addr+(CyCAR<<index), (save_car));
+ spin_unlock(&cinfo->card_lock);
+ }
+
+ if (status & CySRModem) { /* modem interrupt */
+
+ /* determine the channel & change to that context */
+ spin_lock(&cinfo->card_lock);
+ save_xir = (u_char) cy_readb(base_addr+(CyMIR<<index));
+ channel = (u_short ) (save_xir & CyIRChannel);
+ info = &cy_port[channel + chip * 4
+ + cinfo->first_line];
+ info->last_active = jiffies;
+ save_car = cy_readb(base_addr+(CyCAR<<index));
+ cy_writeb(base_addr+(CyCAR<<index), save_xir);
+
+ mdm_change = cy_readb(base_addr+(CyMISR<<index));
+ mdm_status = cy_readb(base_addr+(CyMSVR1<<index));
+
+ if(info->tty == 0){/* no place for data, ignore it*/
+ ;
+ }else{
+ 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++;
+
+ cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
+ }
+
+ if((mdm_change & CyDCD)
+ && (info->flags & ASYNC_CHECK_CD)){
+ if(mdm_status & CyDCD){
+ cy_sched_event(info,
+ Cy_EVENT_OPEN_WAKEUP);
+ }else{
+ cy_sched_event(info,
+ Cy_EVENT_HANGUP);
+ }
+ }
+ if((mdm_change & CyCTS)
+ && (info->flags & ASYNC_CTS_FLOW)){
+ if(info->tty->hw_stopped){
+ if(mdm_status & CyCTS){
+ /* cy_start isn't used
+ because... !!! */
+ info->tty->hw_stopped = 0;
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) |
+ CyTxRdy);
+ cy_sched_event(info,
+ Cy_EVENT_WRITE_WAKEUP);
+ }
+ }else{
+ if(!(mdm_status & CyCTS)){
+ /* cy_stop isn't used
+ because ... !!! */
+ info->tty->hw_stopped = 1;
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) &
+ ~CyTxRdy);
+ }
+ }
+ }
+ if(mdm_change & CyDSR){
+ }
+ if(mdm_change & CyRI){
+ }
+ }
+ /* end of service */
+ cy_writeb(base_addr+(CyMIR<<index),
+ (save_xir & 0x3f));
+ cy_writeb(base_addr+(CyCAR<<index), save_car);
+ spin_unlock(&cinfo->card_lock);
+ }
+ } /* end while status != 0 */
+ } /* end loop for chips... */
+ } 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,
+ uclong *channel, ucchar *cmd, uclong *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 + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+
+ loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
+ (cinfo->ctl_addr))->loc_doorbell);
+ if (loc_doorbell){
+ *cmd = (char)(0xff & loc_doorbell);
+ *channel = cy_readl(&board_ctrl->fwcmd_channel);
+ *param = (uclong)cy_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,
+ uclong channel, ucchar cmd, uclong param)
+{
+ struct FIRM_ID __iomem *firm_id;
+ struct ZFW_CTRL __iomem *zfw_ctrl;
+ struct BOARD_CTRL __iomem *board_ctrl;
+ unsigned long __iomem *pci_doorbell;
+ int index;
+
+ firm_id = cinfo->base_addr + ID_ADDRESS;
+ if (!ISZLOADED(*cinfo)){
+ return (-1);
+ }
+ zfw_ctrl = cinfo->base_addr + (cy_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( (cy_readl(pci_doorbell) & 0xff) != 0){
+ if (index++ == 1000){
+ return((int)(cy_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,
+ volatile struct CH_CTRL __iomem *ch_ctrl,
+ volatile struct BUF_CTRL __iomem *buf_ctrl)
+{
+ struct cyclades_card *cinfo = &cy_card[info->card];
+ struct tty_struct *tty = info->tty;
+ volatile int char_count;
+#ifdef BLOCKMOVE
+ int small_count;
+#else
+ char data;
+#endif
+ volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
+
+ rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
+ rx_put = cy_readl(&buf_ctrl->rx_put);
+ rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
+ rx_bufaddr = cy_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 ) {
+ info->last_active = jiffies;
+ info->jiffies[1] = jiffies;
+
+#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 == 0){
+ /* 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(0 < (small_count =
+ min_t(unsigned int, (rx_bufsize - new_rx_get),
+ min_t(unsigned int, (TTY_FLIPBUF_SIZE - tty->flip.count), char_count))
+ )) {
+ memcpy_fromio(tty->flip.char_buf_ptr,
+ (char *)(cinfo->base_addr
+ + rx_bufaddr + new_rx_get),
+ small_count);
+
+ tty->flip.char_buf_ptr += small_count;
+ memset(tty->flip.flag_buf_ptr, TTY_NORMAL, small_count);
+ tty->flip.flag_buf_ptr += small_count;
+ new_rx_get = (new_rx_get + small_count) & (rx_bufsize - 1);
+ char_count -= small_count;
+ info->icount.rx += small_count;
+ info->idle_stats.recv_bytes += small_count;
+ tty->flip.count += small_count;
+ }
+#else
+ while(char_count--){
+ if (tty->flip.count >= N_TTY_BUF_SIZE - tty->read_cnt)
+ break;
+
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+ break;
+
+ data = cy_readb(cinfo->base_addr + rx_bufaddr + new_rx_get);
+ new_rx_get = (new_rx_get + 1) & (rx_bufsize - 1);
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+ *tty->flip.char_buf_ptr++ = data;
+ 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 = cy_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 >= cy_readl(&buf_ctrl->rx_threshold)) {
+ cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
+ }
+#endif
+ info->idle_stats.recv_idle = jiffies;
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+ /* Update rx_get */
+ cy_writel(&buf_ctrl->rx_get, new_rx_get);
+ }
+}
+
+static void
+cyz_handle_tx(struct cyclades_port *info,
+ volatile struct CH_CTRL __iomem *ch_ctrl,
+ volatile struct BUF_CTRL __iomem *buf_ctrl)
+{
+ struct cyclades_card *cinfo = &cy_card[info->card];
+ struct tty_struct *tty = info->tty;
+ char data;
+ volatile int char_count;
+#ifdef BLOCKMOVE
+ int small_count;
+#endif
+ volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
+
+ if (info->xmit_cnt <= 0) /* Nothing to transmit */
+ return;
+
+ tx_get = cy_readl(&buf_ctrl->tx_get);
+ tx_put = cy_readl(&buf_ctrl->tx_put);
+ tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
+ tx_bufaddr = cy_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 == 0 ){
+ 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++;
+ info->last_active = jiffies;
+ info->jiffies[2] = jiffies;
+ }
+#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->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);
+ info->last_active = jiffies;
+ info->jiffies[2] = jiffies;
+ }
+#else
+ while (info->xmit_cnt && char_count){
+ data = info->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++;
+ info->last_active = jiffies;
+ info->jiffies[2] = jiffies;
+ }
+#endif
+ ztxdone:
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+ }
+ /* 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 volatile struct FIRM_ID __iomem *firm_id;
+ static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
+ static volatile struct BOARD_CTRL __iomem *board_ctrl;
+ static volatile struct CH_CTRL __iomem *ch_ctrl;
+ static volatile struct BUF_CTRL __iomem *buf_ctrl;
+ uclong channel;
+ ucchar cmd;
+ uclong param;
+ uclong hw_ver, fw_ver;
+ int special_count;
+ int delta_count;
+
+ firm_id = cinfo->base_addr + ID_ADDRESS;
+ zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+ fw_ver = cy_readl(&board_ctrl->fw_version);
+ hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->mail_box_0);
+
+
+ while(cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
+ special_count = 0;
+ delta_count = 0;
+ info = &cy_port[channel + cinfo->first_line];
+ if((tty = info->tty) == 0) {
+ continue;
+ }
+ ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
+ buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
+
+ switch(cmd) {
+ case C_CM_PR_ERROR:
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_PARITY;
+ *tty->flip.char_buf_ptr++ = 0;
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_FR_ERROR:
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_FRAME;
+ *tty->flip.char_buf_ptr++ = 0;
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_RXBRK:
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ *tty->flip.char_buf_ptr++ = 0;
+ info->icount.rx++;
+ special_count++;
+ break;
+ case C_CM_MDCD:
+ info->icount.dcd++;
+ delta_count++;
+ if (info->flags & ASYNC_CHECK_CD){
+ if ((fw_ver > 241 ?
+ ((u_long)param) :
+ cy_readl(&ch_ctrl->rs_status)) & C_RS_DCD) {
+ cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
+ }else{
+ cy_sched_event(info, Cy_EVENT_HANGUP);
+ }
+ }
+ 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:
+ cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
+ 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("cyz_interrupt: rcvd intr, card %d, port %ld\n\r",
+ info->card, channel);
+#endif
+ cyz_handle_rx(info, ch_ctrl, buf_ctrl);
+ break;
+ case C_CM_TXBEMPTY:
+ case C_CM_TXLOWWM:
+ case C_CM_INTBACK:
+ /* Transmission Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyz_interrupt: xmit intr, card %d, port %ld\n\r",
+ info->card, channel);
+#endif
+ cyz_handle_tx(info, ch_ctrl, buf_ctrl);
+ break;
+#endif /* CONFIG_CYZ_INTR */
+ case C_CM_FATAL:
+ /* should do something with this !!! */
+ break;
+ default:
+ break;
+ }
+ if(delta_count)
+ cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
+ if(special_count)
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+}
+
+#ifdef CONFIG_CYZ_INTR
+static irqreturn_t
+cyz_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct cyclades_card *cinfo;
+
+ if((cinfo = (struct cyclades_card *)dev_id) == 0){
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
+#endif
+ return IRQ_NONE; /* spurious interrupt */
+ }
+
+ if (!ISZLOADED(*cinfo)) {
+#ifdef CY_DEBUG_INTERRUPTS
+ printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", 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;
+ int retval;
+ int card = info->card;
+ uclong channel = (info->line) - (cy_card[card].first_line);
+ unsigned long flags;
+
+ CY_LOCK(info, flags);
+ retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
+ if (retval != 0){
+ printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ cyz_rx_full_timer[info->line].function = NULL;
+ CY_UNLOCK(info, flags);
+}
+
+#else /* CONFIG_CYZ_INTR */
+
+static void
+cyz_poll(unsigned long arg)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info;
+ struct tty_struct *tty;
+ static volatile struct FIRM_ID *firm_id;
+ static volatile struct ZFW_CTRL *zfw_ctrl;
+ static volatile struct BOARD_CTRL *board_ctrl;
+ static volatile struct CH_CTRL *ch_ctrl;
+ static volatile struct BUF_CTRL *buf_ctrl;
+ int card, port;
+
+ cyz_timerlist.expires = jiffies + (HZ);
+ 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 + (cy_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) cy_readl(&board_ctrl->n_channel);
+ cinfo->intr_enabled = 1;
+ continue;
+ }
+
+ cyz_handle_cmd(cinfo);
+
+ for (port = 0 ; port < cinfo->nports ; port++) {
+ info = &cy_port[ port + cinfo->first_line ];
+ tty = info->tty;
+ ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
+ buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
+
+ if (!info->throttle)
+ cyz_handle_rx(info, ch_ctrl, buf_ctrl);
+ cyz_handle_tx(info, ch_ctrl, buf_ctrl);
+ }
+ /* poll every 'cyz_polling_cycle' period */
+ cyz_timerlist.expires = jiffies + cyz_polling_cycle;
+ }
+ add_timer(&cyz_timerlist);
+
+ return;
+} /* 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)
+{
+ unsigned long flags;
+ int retval = 0;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+ unsigned long page;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ CY_LOCK(info, flags);
+
+ if (info->flags & ASYNC_INITIALIZED){
+ free_page(page);
+ goto errout;
+ }
+
+ if (!info->type){
+ if (info->tty){
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ free_page(page);
+ goto errout;
+ }
+
+ if (info->xmit_buf)
+ free_page(page);
+ else
+ info->xmit_buf = (unsigned char *) page;
+
+ CY_UNLOCK(info, flags);
+
+ set_line_char(info);
+
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+#ifdef CY_DEBUG_OPEN
+ printk("cyc startup card %d, chip %d, channel %d, base_addr %lx\n",
+ card, chip, channel, (long)base_addr);/**/
+#endif
+
+ CY_LOCK(info, 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("cyc:startup raising DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_readb(base_addr+(CyMSVR2<<index)));
+#endif
+
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) | CyRxData);
+ info->flags |= ASYNC_INITIALIZED;
+
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ 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;
+
+ CY_UNLOCK(info, 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 = cy_card[card].base_addr;
+
+ firm_id = base_addr + ID_ADDRESS;
+ if (!ISZLOADED(cy_card[card])){
+ return -ENODEV;
+ }
+
+ zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+ ch_ctrl = zfw_ctrl->ch_ctrl;
+
+#ifdef CY_DEBUG_OPEN
+ printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
+ card, channel, (long)base_addr);/**/
+#endif
+
+ CY_LOCK(info, 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(&cy_card[card], channel, C_CM_IOCTL, 0L);
+ if (retval != 0){
+ printk("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(&cy_card[card], channel, C_CM_FLUSH_RX, 0L);
+ if (retval != 0){
+ printk("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,
+ cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | C_RS_DTR) ;
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ channel, C_CM_IOCTLM, 0L);
+ if (retval != 0){
+ printk("cyc:startup(3) retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+#ifdef CY_DEBUG_DTR
+ printk("cyc:startup raising Z DTR\n");
+#endif
+
+ /* enable send, recv, modem !!! */
+
+ info->flags |= ASYNC_INITIALIZED;
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ 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;
+
+ CY_UNLOCK(info, flags);
+ }
+
+#ifdef CY_DEBUG_OPEN
+ printk(" cyc startup done\n");
+#endif
+ return 0;
+
+errout:
+ CY_UNLOCK(info, flags);
+ return retval;
+} /* startup */
+
+
+static void
+start_xmit( struct cyclades_port *info )
+{
+ unsigned long flags;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCAR<<index), channel);
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
+ CY_UNLOCK(info, flags);
+ } else {
+#ifdef CONFIG_CYZ_INTR
+ int retval;
+
+ CY_LOCK(info, flags);
+ retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK, 0L);
+ if (retval != 0){
+ printk("cyc:start_xmit retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ CY_UNLOCK(info, 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)
+{
+ unsigned long flags;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+
+ if (!(info->flags & ASYNC_INITIALIZED)){
+ return;
+ }
+
+ card = info->card;
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+#ifdef CY_DEBUG_OPEN
+ printk("cyc shutdown Y card %d, chip %d, channel %d, base_addr %lx\n",
+ card, chip, channel, (long)base_addr);
+#endif
+
+ CY_LOCK(info, flags);
+
+ /* Clear delta_msr_wait queue to avoid mem leaks. */
+ wake_up_interruptible(&info->delta_msr_wait);
+
+ if (info->xmit_buf){
+ unsigned char * temp;
+ temp = info->xmit_buf;
+ info->xmit_buf = NULL;
+ free_page((unsigned long) temp);
+ }
+ cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+ cy_writeb(base_addr+(CyMSVR1<<index), ~CyRTS);
+ cy_writeb(base_addr+(CyMSVR2<<index), ~CyDTR);
+#ifdef CY_DEBUG_DTR
+ printk("cyc shutdown dropping DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_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->tty){
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->flags &= ~ASYNC_INITIALIZED;
+ CY_UNLOCK(info, 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 = cy_card[card].base_addr;
+#ifdef CY_DEBUG_OPEN
+ printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
+ card, channel, (long)base_addr);
+#endif
+
+ firm_id = base_addr + ID_ADDRESS;
+ if (!ISZLOADED(cy_card[card])) {
+ return;
+ }
+
+ zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+ ch_ctrl = zfw_ctrl->ch_ctrl;
+
+ CY_LOCK(info, flags);
+
+ if (info->xmit_buf){
+ unsigned char * temp;
+ temp = info->xmit_buf;
+ info->xmit_buf = NULL;
+ free_page((unsigned long) temp);
+ }
+
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+ cy_writel(&ch_ctrl[channel].rs_control,
+ (uclong)(cy_readl(&ch_ctrl[channel].rs_control) &
+ ~(C_RS_RTS | C_RS_DTR)));
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ channel, C_CM_IOCTLM, 0L);
+ if (retval != 0){
+ printk("cyc:shutdown retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+#ifdef CY_DEBUG_DTR
+ printk("cyc:shutdown dropping Z DTR\n");
+#endif
+ }
+
+ if (info->tty){
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->flags &= ~ASYNC_INITIALIZED;
+
+ CY_UNLOCK(info, flags);
+ }
+
+#ifdef CY_DEBUG_OPEN
+ printk(" cyc shutdown done\n");
+#endif
+ return;
+} /* 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 = &cy_card[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->flags & ASYNC_CLOSING)) {
+ if (info->flags & ASYNC_CLOSING) {
+ interruptible_sleep_on(&info->close_wait);
+ }
+ return ((info->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->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ /*
+ * Block waiting for the carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, info->count is dropped by one, so that
+ * cy_close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+ retval = 0;
+ add_wait_queue(&info->open_wait, &wait);
+#ifdef CY_DEBUG_OPEN
+ printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ CY_LOCK(info, flags);
+ if (!tty_hung_up_p(filp))
+ info->count--;
+ CY_UNLOCK(info, flags);
+#ifdef CY_DEBUG_COUNT
+ printk("cyc block_til_ready: (%d): decrementing count to %d\n",
+ current->pid, info->count);
+#endif
+ info->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) {
+ CY_LOCK(info, 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("cyc:block_til_ready raising DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_readb(base_addr+(CyMSVR2<<index)));
+#endif
+ }
+ CY_UNLOCK(info, flags);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (tty_hung_up_p(filp)
+ || !(info->flags & ASYNC_INITIALIZED) ){
+ retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+ break;
+ }
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
+ if (!(info->flags & ASYNC_CLOSING)
+ && (C_CLOCAL(tty)
+ || (cy_readb(base_addr+(CyMSVR1<<index)) & CyDCD))) {
+ CY_UNLOCK(info, flags);
+ break;
+ }
+ CY_UNLOCK(info, flags);
+
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef CY_DEBUG_OPEN
+ printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
+ info->line, info->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;
+ int retval;
+
+ base_addr = cinfo->base_addr;
+ firm_id = base_addr + ID_ADDRESS;
+ if (!ISZLOADED(*cinfo)){
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&info->open_wait, &wait);
+ return -EINVAL;
+ }
+
+ zfw_ctrl = base_addr + (cy_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,
+ cy_readl(&ch_ctrl[channel].rs_control) |
+ (C_RS_RTS | C_RS_DTR));
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ channel, C_CM_IOCTLM, 0L);
+ if (retval != 0){
+ printk("cyc:block_til_ready retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+#ifdef CY_DEBUG_DTR
+ printk("cyc:block_til_ready raising Z DTR\n");
+#endif
+ }
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (tty_hung_up_p(filp)
+ || !(info->flags & ASYNC_INITIALIZED) ){
+ retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+ break;
+ }
+ if (!(info->flags & ASYNC_CLOSING)
+ && (C_CLOCAL(tty)
+ || (cy_readl(&ch_ctrl[channel].rs_status) & C_RS_DCD))) {
+ break;
+ }
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef CY_DEBUG_OPEN
+ printk("cyc block_til_ready blocking: ttyC%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ schedule();
+ }
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&info->open_wait, &wait);
+ if (!tty_hung_up_p(filp)){
+ info->count++;
+#ifdef CY_DEBUG_COUNT
+ printk("cyc:block_til_ready (%d): incrementing count to %d\n",
+ current->pid, info->count);
+#endif
+ }
+ info->blocked_open--;
+#ifdef CY_DEBUG_OPEN
+ printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ if (retval)
+ return retval;
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+} /* block_til_ready */
+
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * performs the serial-specific initialization for the tty structure.
+ */
+static int
+cy_open(struct tty_struct *tty, struct file * filp)
+{
+ struct cyclades_port *info;
+ int retval, line;
+ unsigned long page;
+
+ line = tty->index;
+ if ((line < 0) || (NR_PORTS <= line)){
+ return -ENODEV;
+ }
+ info = &cy_port[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(cy_card[info->card])) {
+ struct cyclades_card *cinfo = &cy_card[info->card];
+ struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
+
+ if (!ISZLOADED(*cinfo)) {
+ if (((ZE_V1 ==cy_readl(&((struct RUNTIME_9060 __iomem *)
+ (cinfo->ctl_addr))->mail_box_0)) &&
+ Z_FPGA_CHECK (*cinfo)) &&
+ (ZFIRM_HLT == cy_readl (&firm_id->signature)))
+ {
+ printk ("cyc:Cyclades-Z Error: you need an external power supply for this number of ports.\n\rFirmware halted.\r\n");
+ } else {
+ printk("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 + (cy_readl (&firm_id->zfwctrl_addr) & 0xfffff);
+
+ board_ctrl = &zfw_ctrl->board_ctrl;
+
+ /* Enable interrupts on the PLX chip */
+ cy_writew(cinfo->ctl_addr+0x68,
+ cy_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("cyc:IRQ enable retval was %x\n", retval);
+ }
+ cinfo->nports = (int) cy_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("cyc:cy_open ttyC%d\n", info->line); /* */
+#endif
+ tty->driver_data = info;
+ info->tty = tty;
+ if (serial_paranoia_check(info, tty->name, "cy_open")){
+ return -ENODEV;
+ }
+#ifdef CY_DEBUG_OPEN
+ printk("cyc:cy_open ttyC%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ info->count++;
+#ifdef CY_DEBUG_COUNT
+ printk("cyc:cy_open (%d): incrementing count to %d\n",
+ current->pid, info->count);
+#endif
+ if (!tmp_buf) {
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ if (tmp_buf)
+ free_page(page);
+ else
+ tmp_buf = (unsigned char *) page;
+ }
+
+ /*
+ * If the port is the middle of closing, bail out now
+ */
+ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
+ if (info->flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&info->close_wait);
+ return ((info->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("cyc:cy_open returning after block_til_ready with %d\n",
+ retval);
+#endif
+ return retval;
+ }
+
+ info->throttle = 0;
+
+#ifdef CY_DEBUG_OPEN
+ printk(" 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_port * info = (struct cyclades_port *)tty->driver_data;
+ void __iomem *base_addr;
+ int card,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;
+ /*
+ * 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("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
+ printk("jiff=%lu...", jiffies);
+#endif
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+ while (cy_readb(base_addr+(CySRER<<index)) & CyTxRdy) {
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk("Not clean (jiff=%lu)...", jiffies);
+#endif
+ if (msleep_interruptible(jiffies_to_msecs(char_time)))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ } else {
+ // Nothing to do!
+ }
+ /* Run one more char cycle */
+ msleep_interruptible(jiffies_to_msecs(char_time * 5));
+#ifdef CY_DEBUG_WAIT_UNTIL_SENT
+ printk("Clean (jiff=%lu)...done\n", jiffies);
+#endif
+}
+
+/*
+ * 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 = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk("cyc:cy_close ttyC%d\n", info->line);
+#endif
+
+ if (!info || serial_paranoia_check(info, tty->name, "cy_close")){
+ return;
+ }
+
+ CY_LOCK(info, flags);
+ /* If the TTY is being hung up, nothing to do */
+ if (tty_hung_up_p(filp)) {
+ CY_UNLOCK(info, flags);
+ return;
+ }
+
+#ifdef CY_DEBUG_OPEN
+ printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
+#endif
+ if ((tty->count == 1) && (info->count != 1)) {
+ /*
+ * Uh, oh. tty->count is 1, which means that the tty
+ * structure will be freed. Info->count should always
+ * be one in these conditions. If it's greater than
+ * one, we've got real problems, since it means the
+ * serial port won't be shutdown.
+ */
+ printk("cyc:cy_close: bad serial port count; tty->count is 1, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+#ifdef CY_DEBUG_COUNT
+ printk("cyc:cy_close at (%d): decrementing count to %d\n",
+ current->pid, info->count - 1);
+#endif
+ if (--info->count < 0) {
+#ifdef CY_DEBUG_COUNT
+ printk("cyc:cyc_close setting count to 0\n");
+#endif
+ info->count = 0;
+ }
+ if (info->count) {
+ CY_UNLOCK(info, flags);
+ return;
+ }
+ info->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;
+ CY_UNLOCK(info, flags);
+ if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
+ tty_wait_until_sent(tty, info->closing_wait);
+ }
+ CY_LOCK(info, flags);
+
+ if (!IS_CYC_Z(cy_card[info->card])) {
+ int channel = info->line - cy_card[info->card].first_line;
+ int index = cy_card[info->card].bus_index;
+ void __iomem *base_addr = cy_card[info->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),
+ cy_readb(base_addr+(CySRER<<index)) & ~CyRxData);
+ if (info->flags & ASYNC_INITIALIZED) {
+ /* Waiting for on-board buffers to be empty before closing
+ the port */
+ CY_UNLOCK(info, flags);
+ cy_wait_until_sent(tty, info->timeout);
+ CY_LOCK(info, flags);
+ }
+ } else {
+#ifdef Z_WAKE
+ /* Waiting for on-board buffers to be empty before closing the port */
+ void __iomem *base_addr = cy_card[info->card].base_addr;
+ struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
+ struct ZFW_CTRL __iomem *zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
+ int channel = info->line - cy_card[info->card].first_line;
+ int retval;
+
+ if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
+ retval = cyz_issue_cmd(&cy_card[info->card], channel,
+ C_CM_IOCTLW, 0L);
+ if (retval != 0){
+ printk("cyc:cy_close retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ CY_UNLOCK(info, flags);
+ interruptible_sleep_on(&info->shutdown_wait);
+ CY_LOCK(info, flags);
+ }
+#endif
+ }
+
+ CY_UNLOCK(info, flags);
+ shutdown(info);
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ tty_ldisc_flush(tty);
+ CY_LOCK(info, flags);
+
+ tty->closing = 0;
+ info->event = 0;
+ info->tty = NULL;
+ if (info->blocked_open) {
+ CY_UNLOCK(info, flags);
+ if (info->close_delay) {
+ msleep_interruptible(jiffies_to_msecs(info->close_delay));
+ }
+ wake_up_interruptible(&info->open_wait);
+ CY_LOCK(info, flags);
+ }
+ info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&info->close_wait);
+
+#ifdef CY_DEBUG_OTHER
+ printk(" cyc:cy_close done\n");
+#endif
+
+ CY_UNLOCK(info, flags);
+ return;
+} /* 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 = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ int c, ret = 0;
+
+#ifdef CY_DEBUG_IO
+ printk("cyc:cy_write ttyC%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_write")){
+ return 0;
+ }
+
+ if (!tty || !info->xmit_buf || !tmp_buf){
+ return 0;
+ }
+
+ CY_LOCK(info, flags);
+ while (1) {
+ c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
+ (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
+
+ if (c <= 0)
+ break;
+
+ memcpy(info->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;
+ }
+ CY_UNLOCK(info, 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 void
+cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk("cyc:cy_put_char ttyC%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_put_char"))
+ return;
+
+ if (!tty || !info->xmit_buf)
+ return;
+
+ CY_LOCK(info, flags);
+ if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ CY_UNLOCK(info, flags);
+ return;
+ }
+
+ info->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;
+ CY_UNLOCK(info, flags);
+} /* 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 = (struct cyclades_port *)tty->driver_data;
+
+#ifdef CY_DEBUG_IO
+ printk("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->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 = (struct cyclades_port *)tty->driver_data;
+ int ret;
+
+#ifdef CY_DEBUG_IO
+ printk("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_port *info = (struct cyclades_port *)tty->driver_data;
+ int card, channel;
+
+ if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
+ return 0;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[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("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 volatile struct FIRM_ID *firm_id;
+ static volatile struct ZFW_CTRL *zfw_ctrl;
+ static volatile struct CH_CTRL *ch_ctrl;
+ static volatile struct BUF_CTRL *buf_ctrl;
+ int char_count;
+ volatile uclong tx_put, tx_get, tx_bufsize;
+
+ firm_id = cy_card[card].base_addr + ID_ADDRESS;
+ zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
+ buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
+
+ tx_get = cy_readl(&buf_ctrl->tx_get);
+ tx_put = cy_readl(&buf_ctrl->tx_put);
+ tx_bufsize = cy_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("cyc:cy_chars_in_buffer ttyC%d %d\n",
+ info->line, info->xmit_cnt + char_count); /* */
+#endif
+ 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, uclong baud)
+{
+ int co, co_val, bpr;
+ uclong 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)
+{
+ unsigned long flags;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+ unsigned cflag, iflag;
+ unsigned short chip_number;
+ int baud, baud_rate = 0;
+ int i;
+
+
+ if (!info->tty || !info->tty->termios){
+ return;
+ }
+ if (info->line == -1){
+ return;
+ }
+ cflag = info->tty->termios->c_cflag;
+ iflag = info->tty->termios->c_iflag;
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if (info->tty) {
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ info->tty->alt_speed = 57600;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ info->tty->alt_speed = 115200;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ info->tty->alt_speed = 230400;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ info->tty->alt_speed = 460800;
+ }
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ chip_number = channel / 4;
+
+ if (!IS_CYC_Z(cy_card[card])) {
+
+ index = cy_card[card].bus_index;
+
+ /* baud rate */
+ baud = tty_get_baud_rate(info->tty);
+ if ((baud == 38400) &&
+ ((info->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->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->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;
+ info->cor3 = (info->default_threshold
+ ? info->default_threshold
+ : baud_cor3[i]); /* receive threshold */
+ info->cor2 = CyETC;
+ switch(cflag & CSIZE){
+ case CS5:
+ info->cor1 = Cy_5_BITS;
+ break;
+ case CS6:
+ info->cor1 = Cy_6_BITS;
+ break;
+ case CS7:
+ info->cor1 = Cy_7_BITS;
+ break;
+ case CS8:
+ info->cor1 = Cy_8_BITS;
+ break;
+ }
+ if(cflag & CSTOPB){
+ info->cor1 |= Cy_2_STOP;
+ }
+ if (cflag & PARENB){
+ if (cflag & PARODD){
+ info->cor1 |= CyPARITY_O;
+ }else{
+ info->cor1 |= CyPARITY_E;
+ }
+ }else{
+ info->cor1 |= CyPARITY_NONE;
+ }
+
+ /* CTS flow control flag */
+ if (cflag & CRTSCTS){
+ info->flags |= ASYNC_CTS_FLOW;
+ info->cor2 |= CyCtsAE;
+ }else{
+ info->flags &= ~ASYNC_CTS_FLOW;
+ info->cor2 &= ~CyCtsAE;
+ }
+ if (cflag & CLOCAL)
+ info->flags &= ~ASYNC_CHECK_CD;
+ else
+ info->flags |= ASYNC_CHECK_CD;
+
+ /***********************************************
+ The hardware option, CyRtsAO, presents RTS when
+ the chip has characters to send. Since most modems
+ use RTS as reverse (inbound) flow control, this
+ option is not used. If inbound flow control is
+ necessary, DTR can be programmed to provide the
+ appropriate signals for use with a non-standard
+ cable. Contact Marcio Saito for details.
+ ***********************************************/
+
+ chip = channel>>2;
+ channel &= 0x03;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, 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->tty));
+ cy_writeb(base_addr+(CySCHR2<<index),
+ STOP_CHAR(info->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);
+
+ cy_writeb(base_addr+(CyCAR<<index),
+ (u_char)channel); /* !!! Is this needed? */
+ cy_writeb(base_addr+(CyRTPR<<index), (info->default_timeout
+ ? info->default_timeout
+ : 0x02)); /* 10ms rx timeout */
+
+ if (C_CLOCAL(info->tty)) {
+ /* without modem intr */
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_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),
+ cy_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("cyc:set_line_char dropping DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_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("cyc:set_line_char raising DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_readb(base_addr+(CyMSVR2<<index)));
+#endif
+ }
+
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ CY_UNLOCK(info, 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;
+ uclong sw_flow;
+ int retval;
+
+ firm_id = cy_card[card].base_addr + ID_ADDRESS;
+ if (!ISZLOADED(cy_card[card])) {
+ return;
+ }
+
+ zfw_ctrl = cy_card[card].base_addr + (cy_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->tty);
+ if ((baud == 38400) &&
+ ((info->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->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,
+ cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
+ }else{
+ cy_writel(&ch_ctrl->comm_data_l,
+ cy_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,
+ cy_readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
+ }else{
+ cy_writel(&ch_ctrl->hw_flow,
+ cy_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->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(&cy_card[card], channel, C_CM_IOCTL, 0L);
+ if (retval != 0){
+ printk("cyc:set_line_char retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+
+ /* CD sensitivity */
+ if (cflag & CLOCAL){
+ info->flags &= ~ASYNC_CHECK_CD;
+ }else{
+ info->flags |= ASYNC_CHECK_CD;
+ }
+
+ if(baud == 0){ /* baud rate is zero, turn off line */
+ cy_writel(&ch_ctrl->rs_control,
+ cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk("cyc:set_line_char dropping Z DTR\n");
+#endif
+ }else{
+ cy_writel(&ch_ctrl->rs_control,
+ cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk("cyc:set_line_char raising Z DTR\n");
+#endif
+ }
+
+ retval = cyz_issue_cmd( &cy_card[card], channel, C_CM_IOCTLM, 0L);
+ if (retval != 0){
+ printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->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 = &cy_card[info->card];
+
+ if (!retinfo)
+ return -EFAULT;
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.type = info->type;
+ tmp.line = info->line;
+ tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
+ tmp.irq = cinfo->irq;
+ tmp.flags = info->flags;
+ tmp.close_delay = info->close_delay;
+ 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->close_delay) ||
+ (new_serial.baud_base != info->baud) ||
+ ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
+ (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
+ 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->flags = ((info->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
+ info->close_delay = new_serial.close_delay * HZ/100;
+ info->closing_wait = new_serial.closing_wait * HZ/100;
+
+check_and_exit:
+ if (info->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)
+{
+ int card, chip, channel, index;
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+ void __iomem *base_addr;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ status = cy_readb(base_addr+(CySRER<<index)) & (CyTxRdy|CyTxMpty);
+ CY_UNLOCK(info, 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 = (struct cyclades_port *)tty->driver_data;
+ int card,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, __FUNCTION__))
+ return -ENODEV;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCAR<<index), (u_char)channel);
+ status = cy_readb(base_addr+(CyMSVR1<<index));
+ status |= cy_readb(base_addr+(CyMSVR2<<index));
+ CY_UNLOCK(info, 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 = cy_card[card].base_addr;
+
+ if (cy_card[card].num_chips != -1){
+ return -EINVAL;
+ }
+
+ firm_id = cy_card[card].base_addr + ID_ADDRESS;
+ if (ISZLOADED(cy_card[card])) {
+ zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+ ch_ctrl = zfw_ctrl->ch_ctrl;
+ lstatus = cy_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;
+ return -ENODEV;
+ }
+
+ }
+ 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 = (struct cyclades_port *)tty->driver_data;
+ int card,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, __FUNCTION__))
+ return -ENODEV;
+
+ card = info->card;
+ channel = (info->line) - (cy_card[card].first_line);
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ if (set & TIOCM_RTS){
+ CY_LOCK(info, 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);
+ }
+ CY_UNLOCK(info, flags);
+ }
+ if (clear & TIOCM_RTS) {
+ CY_LOCK(info, 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);
+ }
+ CY_UNLOCK(info, flags);
+ }
+ if (set & TIOCM_DTR){
+ CY_LOCK(info, 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("cyc:set_modem_info raising DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_readb(base_addr+(CyMSVR2<<index)));
+#endif
+ CY_UNLOCK(info, flags);
+ }
+ if (clear & TIOCM_DTR) {
+ CY_LOCK(info, 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("cyc:set_modem_info dropping DTR\n");
+ printk(" status: 0x%x, 0x%x\n",
+ cy_readb(base_addr+(CyMSVR1<<index)),
+ cy_readb(base_addr+(CyMSVR2<<index)));
+#endif
+ CY_UNLOCK(info, flags);
+ }
+ } else {
+ base_addr = cy_card[card].base_addr;
+
+ firm_id = cy_card[card].base_addr + ID_ADDRESS;
+ if (ISZLOADED(cy_card[card])) {
+ zfw_ctrl = cy_card[card].base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
+ board_ctrl = &zfw_ctrl->board_ctrl;
+ ch_ctrl = zfw_ctrl->ch_ctrl;
+
+ if (set & TIOCM_RTS){
+ CY_LOCK(info, flags);
+ cy_writel(&ch_ctrl[channel].rs_control,
+ cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS);
+ CY_UNLOCK(info, flags);
+ }
+ if (clear & TIOCM_RTS) {
+ CY_LOCK(info, flags);
+ cy_writel(&ch_ctrl[channel].rs_control,
+ cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_RTS);
+ CY_UNLOCK(info, flags);
+ }
+ if (set & TIOCM_DTR){
+ CY_LOCK(info, flags);
+ cy_writel(&ch_ctrl[channel].rs_control,
+ cy_readl(&ch_ctrl[channel].rs_control) | C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk("cyc:set_modem_info raising Z DTR\n");
+#endif
+ CY_UNLOCK(info, flags);
+ }
+ if (clear & TIOCM_DTR) {
+ CY_LOCK(info, flags);
+ cy_writel(&ch_ctrl[channel].rs_control,
+ cy_readl(&ch_ctrl[channel].rs_control) & ~C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+ printk("cyc:set_modem_info clearing Z DTR\n");
+#endif
+ CY_UNLOCK(info, flags);
+ }
+ }else{
+ return -ENODEV;
+ }
+ CY_LOCK(info, flags);
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ channel, C_CM_IOCTLM,0L);
+ if (retval != 0){
+ printk("cyc:set_modem_info retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ CY_UNLOCK(info, flags);
+ }
+ return 0;
+} /* cy_tiocmset */
+
+/*
+ * cy_break() --- routine which turns the break handling on or off
+ */
+static void
+cy_break(struct tty_struct *tty, int break_state)
+{
+ struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->name, "cy_break"))
+ return;
+
+ CY_LOCK(info, flags);
+ if (!IS_CYC_Z(cy_card[info->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) {
+ CY_UNLOCK(info, flags);
+ start_xmit(info);
+ CY_LOCK(info, flags);
+ }
+ }
+ } else {
+ if (!info->breakoff) {
+ info->breakoff = 1;
+ if (!info->xmit_cnt) {
+ CY_UNLOCK(info, flags);
+ start_xmit(info);
+ CY_LOCK(info, flags);
+ }
+ }
+ }
+ } else {
+ int retval;
+
+ if (break_state == -1) {
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ (info->line) - (cy_card[info->card].first_line),
+ C_CM_SET_BREAK, 0L);
+ if (retval != 0) {
+ printk("cyc:cy_break (set) retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ } else {
+ retval = cyz_issue_cmd(&cy_card[info->card],
+ (info->line) - (cy_card[info->card].first_line),
+ C_CM_CLR_BREAK, 0L);
+ if (retval != 0) {
+ printk("cyc:cy_break (clr) retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ }
+ }
+ CY_UNLOCK(info, flags);
+} /* 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)
+{
+ void __iomem *base_addr;
+ int card,channel,chip,index;
+ unsigned long flags;
+
+ card = info->card;
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ info->cor3 &= ~CyREC_FIFO;
+ info->cor3 |= value & CyREC_FIFO;
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCOR3<<index), info->cor3);
+ cyy_issue_cmd(base_addr,CyCOR_CHANGE|CyCOR3ch,index);
+ CY_UNLOCK(info, flags);
+ } else {
+ // Nothing to do!
+ }
+ return 0;
+}/* set_threshold */
+
+
+static int
+get_threshold(struct cyclades_port * info, unsigned long __user *value)
+{
+ void __iomem *base_addr;
+ int card,channel,chip,index;
+ unsigned long tmp;
+
+ card = info->card;
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ tmp = cy_readb(base_addr+(CyCOR3<<index)) & CyREC_FIFO;
+ return put_user(tmp,value);
+ } else {
+ // Nothing to do!
+ 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)
+{
+ void __iomem *base_addr;
+ int card,channel,chip,index;
+ unsigned long flags;
+
+ card = info->card;
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyRTPR<<index), value & 0xff);
+ CY_UNLOCK(info, flags);
+ } else {
+ // Nothing to do!
+ }
+ return 0;
+}/* set_timeout */
+
+
+static int
+get_timeout(struct cyclades_port * info, unsigned long __user *value)
+{
+ void __iomem *base_addr;
+ int card,channel,chip,index;
+ unsigned long tmp;
+
+ card = info->card;
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ tmp = cy_readb(base_addr+(CyRTPR<<index));
+ return put_user(tmp,value);
+ } else {
+ // Nothing to do!
+ 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 = (struct cyclades_port *)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("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
+ info->line, cmd, arg); /* */
+#endif
+
+ 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 CYGETCARDINFO:
+ if (copy_to_user(argp, &cy_card[info->card],
+ sizeof (struct cyclades_card))) {
+ ret_val = -EFAULT;
+ break;
+ }
+ ret_val = 0;
+ 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->closing_wait = (unsigned short)arg * HZ/100;
+ ret_val = 0;
+ break;
+ case CYGETWAIT:
+ ret_val = info->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:
+ CY_LOCK(info, flags);
+ /* note the counters on entry */
+ cprev = info->icount;
+ CY_UNLOCK(info, flags);
+ while (1) {
+ interruptible_sleep_on(&info->delta_msr_wait);
+ /* see if a signal did it */
+ if (signal_pending(current)) {
+ return -ERESTARTSYS;
+ }
+
+ CY_LOCK(info, flags);
+ cnow = info->icount; /* atomic copy */
+ CY_UNLOCK(info, flags);
+
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ return -EIO; /* no change => error */
+ }
+ if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
+ return 0;
+ }
+ cprev = cnow;
+ }
+ /* NOTREACHED */
+
+ /*
+ * 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:
+ CY_LOCK(info, flags);
+ cnow = info->icount;
+ CY_UNLOCK(info, flags);
+ p_cuser = argp;
+ ret_val = put_user(cnow.cts, &p_cuser->cts);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.dsr, &p_cuser->dsr);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.rng, &p_cuser->rng);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.dcd, &p_cuser->dcd);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.rx, &p_cuser->rx);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.tx, &p_cuser->tx);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.frame, &p_cuser->frame);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.overrun, &p_cuser->overrun);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.parity, &p_cuser->parity);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.brk, &p_cuser->brk);
+ if (ret_val) return ret_val;
+ ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
+ if (ret_val) return ret_val;
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOIOCTLCMD;
+ }
+
+#ifdef CY_DEBUG_OTHER
+ printk(" 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 termios * old_termios)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk("cyc:cy_set_termios ttyC%d\n", info->line);
+#endif
+
+ if ((tty->termios->c_cflag == old_termios->c_cflag) &&
+ ((tty->termios->c_iflag & (IXON|IXANY)) ==
+ (old_termios->c_iflag & (IXON|IXANY))))
+ return;
+ 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->open_wait);
+#endif
+
+ return;
+} /* 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 = (struct cyclades_port *) tty->driver_data;
+ int card, 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 - cy_card[card].first_line;
+
+ if (IS_CYC_Z (cy_card[card])) {
+ if (ch == STOP_CHAR (tty))
+ cyz_issue_cmd (&cy_card[card], channel, C_CM_SENDXOFF, 0L);
+ else if (ch == START_CHAR (tty))
+ cyz_issue_cmd (&cy_card[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 = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("cyc:throttle %s: %d....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 (cy_card[card]))
+ cy_send_xchar (tty, STOP_CHAR (tty));
+ else
+ info->throttle = 1;
+ }
+
+ if (tty->termios->c_cflag & CRTSCTS) {
+ channel = info->line - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, 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);
+ }
+ CY_UNLOCK(info, flags);
+ } else {
+ info->throttle = 1;
+ }
+ }
+
+ return;
+} /* 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 = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ void __iomem *base_addr;
+ int card,chip,channel,index;
+
+#ifdef CY_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("cyc:unthrottle %s: %d....ttyC%d\n",
+ tty_name(tty, buf),
+ tty->ldisc.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 - cy_card[card].first_line;
+ if (!IS_CYC_Z(cy_card[card])) {
+ chip = channel>>2;
+ channel &= 0x03;
+ index = cy_card[card].bus_index;
+ base_addr = cy_card[card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, 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);
+ }
+ CY_UNLOCK(info, flags);
+ } else {
+ info->throttle = 0;
+ }
+ }
+
+ return;
+} /* 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 = (struct cyclades_port *)tty->driver_data;
+ void __iomem *base_addr;
+ int chip,channel,index;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk("cyc:cy_stop ttyC%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_stop"))
+ return;
+
+ cinfo = &cy_card[info->card];
+ channel = info->line - cinfo->first_line;
+ if (!IS_CYC_Z(*cinfo)) {
+ index = cinfo->bus_index;
+ chip = channel>>2;
+ channel &= 0x03;
+ base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCAR<<index),
+ (u_char)(channel & 0x0003)); /* index channel */
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) & ~CyTxRdy);
+ CY_UNLOCK(info, flags);
+ } else {
+ // Nothing to do!
+ }
+
+ return;
+} /* cy_stop */
+
+
+static void
+cy_start(struct tty_struct *tty)
+{
+ struct cyclades_card *cinfo;
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ void __iomem *base_addr;
+ int chip,channel,index;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+ printk("cyc:cy_start ttyC%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->name, "cy_start"))
+ return;
+
+ cinfo = &cy_card[info->card];
+ channel = info->line - cinfo->first_line;
+ index = cinfo->bus_index;
+ if (!IS_CYC_Z(*cinfo)) {
+ chip = channel>>2;
+ channel &= 0x03;
+ base_addr = cy_card[info->card].base_addr + (cy_chip_offset[chip]<<index);
+
+ CY_LOCK(info, flags);
+ cy_writeb(base_addr+(CyCAR<<index),
+ (u_char)(channel & 0x0003)); /* index channel */
+ cy_writeb(base_addr+(CySRER<<index),
+ cy_readb(base_addr+(CySRER<<index)) | CyTxRdy);
+ CY_UNLOCK(info, flags);
+ } else {
+ // Nothing to do!
+ }
+
+ return;
+} /* cy_start */
+
+
+static void
+cy_flush_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ int card, channel, retval;
+ unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+ printk("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) - (cy_card[card].first_line);
+
+ CY_LOCK(info, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ CY_UNLOCK(info, flags);
+
+ if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
+ buffers as well */
+ CY_LOCK(info, flags);
+ retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
+ if (retval != 0) {
+ printk("cyc: flush_buffer retval on ttyC%d was %x\n",
+ info->line, retval);
+ }
+ CY_UNLOCK(info, flags);
+ }
+ tty_wakeup(tty);
+ wake_up_interruptible(&tty->write_wait);
+} /* cy_flush_buffer */
+
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void
+cy_hangup(struct tty_struct *tty)
+{
+ struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+ printk("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->event = 0;
+ info->count = 0;
+#ifdef CY_DEBUG_COUNT
+ printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
+#endif
+ info->tty = NULL;
+ info->flags &= ~ASYNC_NORMAL_ACTIVE;
+ wake_up_interruptible(&info->open_wait);
+} /* cy_hangup */
+
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_init() and friends
+ *
+ * cy_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+/* initialize chips on Cyclom-Y card -- return number of valid
+ chips (which is number of ports/4) */
+static unsigned short __init
+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(cy_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
+ && cy_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(cy_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 & (cy_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 (cy_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,
+ cy_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(isa_address, CyISA_Ywin);
+ cy_isa_nchan = CyPORTS_PER_CHIP *
+ cyy_init_card(cy_isa_address,0);
+ if (cy_isa_nchan == 0) {
+ 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("Cyclom-Y/ISA found at 0x%lx ",
+ (unsigned long) cy_isa_address);
+ printk("but the IRQ could not be detected.\n");
+ continue;
+ }
+
+ if((cy_next_channel+cy_isa_nchan) > NR_PORTS) {
+ printk("Cyclom-Y/ISA found at 0x%lx ",
+ (unsigned long) cy_isa_address);
+ printk("but no more channels are available.\n");
+ printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
+ return(nboard);
+ }
+ /* fill the next cy_card structure available */
+ for (j = 0 ; j < NR_CARDS ; j++) {
+ if (cy_card[j].base_addr == 0) break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk("Cyclom-Y/ISA found at 0x%lx ",
+ (unsigned long) cy_isa_address);
+ printk("but no more cards can be used .\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ return(nboard);
+ }
+
+ /* allocate IRQ */
+ if(request_irq(cy_isa_irq, cyy_interrupt,
+ SA_INTERRUPT, "Cyclom-Y", &cy_card[j]))
+ {
+ printk("Cyclom-Y/ISA found at 0x%lx ",
+ (unsigned long) cy_isa_address);
+ printk("but could not allocate IRQ#%d.\n",
+ cy_isa_irq);
+ 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;
+ nboard++;
+
+ /* print message */
+ printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
+ j+1, (unsigned long) cy_isa_address,
+ (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
+ cy_isa_irq);
+ printk("%d channels starting from port %d.\n",
+ cy_isa_nchan, cy_next_channel);
+ cy_next_channel += cy_isa_nchan;
+ }
+ return(nboard);
+#else
+ return(0);
+#endif /* CONFIG_ISA */
+} /* cy_detect_isa */
+
+static void
+plx_init(void __iomem *addr, uclong initctl)
+{
+ /* Reset PLX */
+ cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
+ udelay(100L);
+ cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
+
+ /* Reload Config. Registers from EEPROM */
+ cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
+ udelay(100L);
+ cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
+}
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
+ * sets global variables and return the number of PCI boards found.
+ * ---------------------------------------------------------------------
+ */
+static int __init
+cy_detect_pci(void)
+{
+#ifdef CONFIG_PCI
+
+ struct pci_dev *pdev = NULL;
+ unsigned char cyy_rev_id;
+ unsigned char cy_pci_irq = 0;
+ uclong cy_pci_phys0, cy_pci_phys2;
+ void __iomem *cy_pci_addr0, *cy_pci_addr2;
+ unsigned short i,j,cy_pci_nchan, plx_ver;
+ unsigned short device_id,dev_index = 0;
+ uclong mailbox;
+ uclong ZeIndex = 0;
+ void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
+ uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
+ unsigned char Ze_irq[NR_CARDS];
+ struct pci_dev *Ze_pdev[NR_CARDS];
+
+ for (i = 0; i < NR_CARDS; i++) {
+ /* look for a Cyclades card by vendor and device id */
+ while((device_id = cy_pci_dev_id[dev_index]) != 0) {
+ if((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
+ device_id, pdev)) == NULL) {
+ dev_index++; /* try next device id */
+ } else {
+ break; /* found a board */
+ }
+ }
+
+ if (device_id == 0)
+ break;
+
+ if (pci_enable_device(pdev))
+ continue;
+
+ /* read PCI configuration area */
+ cy_pci_irq = pdev->irq;
+ cy_pci_phys0 = pci_resource_start(pdev, 0);
+ cy_pci_phys2 = pci_resource_start(pdev, 2);
+ pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
+
+ device_id &= ~PCI_DEVICE_ID_MASK;
+
+ if ((device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo)
+ || (device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi)){
+#ifdef CY_PCI_DEBUG
+ printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
+ pdev->bus->number, pdev->devfn);
+ printk("rev_id=%d) IRQ%d\n",
+ cyy_rev_id, (int)cy_pci_irq);
+ printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
+#endif
+
+ if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
+ printk(" Warning: PCI I/O bit incorrectly set. "
+ "Ignoring it...\n");
+ pdev->resource[2].flags &= ~IORESOURCE_IO;
+ }
+
+ /* Although we don't use this I/O region, we should
+ request it from the kernel anyway, to avoid problems
+ with other drivers accessing it. */
+ if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
+ printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
+ continue;
+ }
+
+#if defined(__alpha__)
+ if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
+ printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
+ pdev->bus->number, pdev->devfn);
+ printk("rev_id=%d) IRQ%d\n",
+ cyy_rev_id, (int)cy_pci_irq);
+ printk("Cyclom-Y/PCI:found winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
+ printk("Cyclom-Y/PCI not supported for low addresses in "
+ "Alpha systems.\n");
+ i--;
+ continue;
+ }
+#endif
+ cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
+ cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
+
+#ifdef CY_PCI_DEBUG
+ printk("Cyclom-Y/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
+ (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
+#endif
+ cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
+ cyy_init_card(cy_pci_addr2, 1));
+ if(cy_pci_nchan == 0) {
+ printk("Cyclom-Y PCI host card with ");
+ printk("no Serial-Modules at 0x%lx.\n",
+ (ulong) cy_pci_phys2);
+ i--;
+ continue;
+ }
+ if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
+ printk("Cyclom-Y/PCI found at 0x%lx ",
+ (ulong) cy_pci_phys2);
+ printk("but no channels are available.\n");
+ printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+ /* fill the next cy_card structure available */
+ for (j = 0 ; j < NR_CARDS ; j++) {
+ if (cy_card[j].base_addr == 0) break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk("Cyclom-Y/PCI found at 0x%lx ",
+ (ulong) cy_pci_phys2);
+ printk("but no more cards can be used.\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+
+ /* allocate IRQ */
+ if(request_irq(cy_pci_irq, cyy_interrupt,
+ SA_SHIRQ, "Cyclom-Y", &cy_card[j]))
+ {
+ printk("Cyclom-Y/PCI found at 0x%lx ",
+ (ulong) cy_pci_phys2);
+ printk("but could not allocate IRQ%d.\n",
+ cy_pci_irq);
+ return(i);
+ }
+
+ /* set cy_card */
+ cy_card[j].base_phys = (ulong)cy_pci_phys2;
+ cy_card[j].ctl_phys = (ulong)cy_pci_phys0;
+ cy_card[j].base_addr = cy_pci_addr2;
+ cy_card[j].ctl_addr = cy_pci_addr0;
+ cy_card[j].irq = (int) cy_pci_irq;
+ cy_card[j].bus_index = 1;
+ cy_card[j].first_line = cy_next_channel;
+ cy_card[j].num_chips = cy_pci_nchan/4;
+ cy_card[j].pdev = pdev;
+
+ /* enable interrupts in the PCI interface */
+ plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
+ switch (plx_ver) {
+ case PLX_9050:
+
+ cy_writeb(cy_pci_addr0+0x4c, 0x43);
+ break;
+
+ case PLX_9060:
+ case PLX_9080:
+ default: /* Old boards, use PLX_9060 */
+
+ plx_init(cy_pci_addr0, 0x6c);
+ /* 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, cy_pci_irq);
+
+ cy_writew(cy_pci_addr0+0x68,
+ cy_readw(cy_pci_addr0+0x68)|0x0900);
+ break;
+ }
+
+ /* print message */
+ printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
+ j+1,
+ (ulong)cy_pci_phys2,
+ (ulong)(cy_pci_phys2 + CyPCI_Ywin - 1),
+ (int)cy_pci_irq);
+ printk("%d channels starting from port %d.\n",
+ cy_pci_nchan, cy_next_channel);
+
+ cy_next_channel += cy_pci_nchan;
+ }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo){
+ /* print message */
+ printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
+ pdev->bus->number, pdev->devfn);
+ printk("rev_id=%d) IRQ%d\n",
+ cyy_rev_id, (int)cy_pci_irq);
+ printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
+ printk("Cyclades-Z/PCI not supported for low addresses\n");
+ break;
+ }else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi){
+#ifdef CY_PCI_DEBUG
+ printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
+ pdev->bus->number, pdev->devfn);
+ printk("rev_id=%d) IRQ%d\n",
+ cyy_rev_id, (int)cy_pci_irq);
+ printk("Cyclades-Z/PCI: found winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
+#endif
+ cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
+
+ /* Disable interrupts on the PLX before resetting it */
+ cy_writew(cy_pci_addr0+0x68,
+ cy_readw(cy_pci_addr0+0x68) & ~0x0900);
+
+ plx_init(cy_pci_addr0, 0x6c);
+ /* 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, cy_pci_irq);
+
+ mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
+ cy_pci_addr0)->mail_box_0);
+
+ if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
+ printk(" Warning: PCI I/O bit incorrectly set. "
+ "Ignoring it...\n");
+ pdev->resource[2].flags &= ~IORESOURCE_IO;
+ }
+
+ /* Although we don't use this I/O region, we should
+ request it from the kernel anyway, to avoid problems
+ with other drivers accessing it. */
+ if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
+ printk(KERN_ERR "cyclades: failed to reserve PCI resources\n");
+ continue;
+ }
+
+ if (mailbox == ZE_V1) {
+ cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ze_win);
+ if (ZeIndex == NR_CARDS) {
+ printk("Cyclades-Ze/PCI found at 0x%lx ",
+ (ulong)cy_pci_phys2);
+ printk("but no more cards can be used.\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ } else {
+ Ze_phys0[ZeIndex] = cy_pci_phys0;
+ Ze_phys2[ZeIndex] = cy_pci_phys2;
+ Ze_addr0[ZeIndex] = cy_pci_addr0;
+ Ze_addr2[ZeIndex] = cy_pci_addr2;
+ Ze_irq[ZeIndex] = cy_pci_irq;
+ Ze_pdev[ZeIndex] = pdev;
+ ZeIndex++;
+ }
+ i--;
+ continue;
+ } else {
+ cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Zwin);
+ }
+
+#ifdef CY_PCI_DEBUG
+ printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
+ if (mailbox == ZO_V1) {
+ cy_writel(&((struct RUNTIME_9060 *)
+ (cy_pci_addr0))->loc_addr_base, WIN_CREG);
+ PAUSE
+ printk("Cyclades-8Zo/PCI: FPGA id %lx, ver %lx\n",
+ (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
+ (cy_pci_addr2))->fpga_id)),
+ (ulong)(0xff & cy_readl(&((struct CUSTOM_REG *)
+ (cy_pci_addr2))->fpga_version)));
+ cy_writel(&((struct RUNTIME_9060 *)
+ (cy_pci_addr0))->loc_addr_base, WIN_RAM);
+ } else {
+ printk("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.
+ */
+ PAUSE
+ if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
+ cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
+
+ /* 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. */
+ cy_pci_nchan = 8;
+
+ if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
+ printk("Cyclades-8Zo/PCI found at 0x%lx ",
+ (ulong)cy_pci_phys2);
+ printk("but no channels are available.\n");
+ printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+
+ /* fill the next cy_card structure available */
+ for (j = 0 ; j < NR_CARDS ; j++) {
+ if (cy_card[j].base_addr == 0) break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk("Cyclades-8Zo/PCI found at 0x%lx ",
+ (ulong)cy_pci_phys2);
+ printk("but no more cards can be used.\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+
+#ifdef CONFIG_CYZ_INTR
+ /* allocate IRQ only if board has an IRQ */
+ if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
+ if(request_irq(cy_pci_irq, cyz_interrupt,
+ SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
+ {
+ printk("Cyclom-8Zo/PCI found at 0x%lx ",
+ (ulong) cy_pci_phys2);
+ printk("but could not allocate IRQ%d.\n",
+ cy_pci_irq);
+ return(i);
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+
+
+ /* set cy_card */
+ cy_card[j].base_phys = cy_pci_phys2;
+ cy_card[j].ctl_phys = cy_pci_phys0;
+ cy_card[j].base_addr = cy_pci_addr2;
+ cy_card[j].ctl_addr = cy_pci_addr0;
+ cy_card[j].irq = (int) cy_pci_irq;
+ cy_card[j].bus_index = 1;
+ cy_card[j].first_line = cy_next_channel;
+ cy_card[j].num_chips = -1;
+ cy_card[j].pdev = pdev;
+
+ /* print message */
+#ifdef CONFIG_CYZ_INTR
+ /* don't report IRQ if board is no IRQ */
+ if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
+ printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
+ j+1,(ulong)cy_pci_phys2,
+ (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1),
+ (int)cy_pci_irq);
+ else
+#endif /* CONFIG_CYZ_INTR */
+ printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
+ j+1,(ulong)cy_pci_phys2,
+ (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
+
+ printk("%d channels starting from port %d.\n",
+ cy_pci_nchan,cy_next_channel);
+ cy_next_channel += cy_pci_nchan;
+ }
+ }
+
+ for (; ZeIndex != 0 && i < NR_CARDS; i++) {
+ cy_pci_phys0 = Ze_phys0[0];
+ cy_pci_phys2 = Ze_phys2[0];
+ cy_pci_addr0 = Ze_addr0[0];
+ cy_pci_addr2 = Ze_addr2[0];
+ cy_pci_irq = Ze_irq[0];
+ pdev = Ze_pdev[0];
+ for (j = 0 ; j < ZeIndex-1 ; j++) {
+ Ze_phys0[j] = Ze_phys0[j+1];
+ Ze_phys2[j] = Ze_phys2[j+1];
+ Ze_addr0[j] = Ze_addr0[j+1];
+ Ze_addr2[j] = Ze_addr2[j+1];
+ Ze_irq[j] = Ze_irq[j+1];
+ Ze_pdev[j] = Ze_pdev[j+1];
+ }
+ ZeIndex--;
+ mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
+ cy_pci_addr0)->mail_box_0);
+#ifdef CY_PCI_DEBUG
+ printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
+ (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
+ printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not loaded\n");
+#endif
+ PAUSE
+ /* This must be the new Cyclades-Ze/PCI. */
+ cy_pci_nchan = ZE_V1_NPORTS;
+
+ if((cy_next_channel+cy_pci_nchan) > NR_PORTS) {
+ printk("Cyclades-Ze/PCI found at 0x%lx ",
+ (ulong)cy_pci_phys2);
+ printk("but no channels are available.\n");
+ printk("Change NR_PORTS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+
+ /* fill the next cy_card structure available */
+ for (j = 0 ; j < NR_CARDS ; j++) {
+ if (cy_card[j].base_addr == 0) break;
+ }
+ if (j == NR_CARDS) { /* no more cy_cards available */
+ printk("Cyclades-Ze/PCI found at 0x%lx ",
+ (ulong)cy_pci_phys2);
+ printk("but no more cards can be used.\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ return(i);
+ }
+
+#ifdef CONFIG_CYZ_INTR
+ /* allocate IRQ only if board has an IRQ */
+ if( (cy_pci_irq != 0) && (cy_pci_irq != 255) ) {
+ if(request_irq(cy_pci_irq, cyz_interrupt,
+ SA_SHIRQ, "Cyclades-Z", &cy_card[j]))
+ {
+ printk("Cyclom-Ze/PCI found at 0x%lx ",
+ (ulong) cy_pci_phys2);
+ printk("but could not allocate IRQ%d.\n",
+ cy_pci_irq);
+ return(i);
+ }
+ }
+#endif /* CONFIG_CYZ_INTR */
+
+ /* set cy_card */
+ cy_card[j].base_phys = cy_pci_phys2;
+ cy_card[j].ctl_phys = cy_pci_phys0;
+ cy_card[j].base_addr = cy_pci_addr2;
+ cy_card[j].ctl_addr = cy_pci_addr0;
+ cy_card[j].irq = (int) cy_pci_irq;
+ cy_card[j].bus_index = 1;
+ cy_card[j].first_line = cy_next_channel;
+ cy_card[j].num_chips = -1;
+ cy_card[j].pdev = pdev;
+
+ /* print message */
+#ifdef CONFIG_CYZ_INTR
+ /* don't report IRQ if board is no IRQ */
+ if( (cy_pci_irq != 0) && (cy_pci_irq != 255) )
+ printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
+ j+1,(ulong)cy_pci_phys2,
+ (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1),
+ (int)cy_pci_irq);
+ else
+#endif /* CONFIG_CYZ_INTR */
+ printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
+ j+1,(ulong)cy_pci_phys2,
+ (ulong)(cy_pci_phys2 + CyPCI_Ze_win - 1));
+
+ printk("%d channels starting from port %d.\n",
+ cy_pci_nchan,cy_next_channel);
+ cy_next_channel += cy_pci_nchan;
+ }
+ if (ZeIndex != 0) {
+ printk("Cyclades-Ze/PCI found at 0x%x ",
+ (unsigned int) Ze_phys2[0]);
+ printk("but no more cards can be used.\n");
+ printk("Change NR_CARDS in cyclades.c and recompile kernel.\n");
+ }
+ return(i);
+#else
+ return(0);
+#endif /* ifdef CONFIG_PCI */
+} /* cy_detect_pci */
+
+
+/*
+ * This routine prints out the appropriate serial driver version number
+ * and identifies which options were configured into this driver.
+ */
+static inline void
+show_version(void)
+{
+ char *rcsvers, *rcsdate, *tmp;
+ rcsvers = strchr(rcsid, ' '); rcsvers++;
+ tmp = strchr(rcsvers, ' '); *tmp++ = '\0';
+ rcsdate = strchr(tmp, ' '); rcsdate++;
+ tmp = strrchr(rcsdate, ' '); *tmp = '\0';
+ printk("Cyclades driver %s %s\n",
+ rcsvers, rcsdate);
+ printk(" built %s %s\n",
+ __DATE__, __TIME__);
+} /* show_version */
+
+static int
+cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
+ int *eof, void *data)
+{
+ struct cyclades_port *info;
+ int i;
+ 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_PORTS && cy_port[i].line >= 0; i++) {
+ info = &cy_port[i];
+
+ if (info->count)
+ size = sprintf(buf+len,
+ "%3d %8lu %10lu %8lu %10lu %8lu %9lu %6ld\n",
+ info->line,
+ JIFFIES_DIFF(info->idle_stats.in_use, cur_jifs) / HZ,
+ info->idle_stats.xmit_bytes,
+ JIFFIES_DIFF(info->idle_stats.xmit_idle, cur_jifs) / HZ,
+ info->idle_stats.recv_bytes,
+ JIFFIES_DIFF(info->idle_stats.recv_idle, cur_jifs) / HZ,
+ info->idle_stats.overruns,
+ (long) info->tty->ldisc.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 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)
+{
+ struct cyclades_port *info;
+ struct cyclades_card *cinfo;
+ int number_z_boards = 0;
+ int board,port,i,index;
+ unsigned long mailbox;
+ unsigned short chip_number;
+ int nports;
+
+ cy_serial_driver = alloc_tty_driver(NR_PORTS);
+ if (!cy_serial_driver)
+ return -ENOMEM;
+ show_version();
+
+ /* 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->devfs_name = "tts/C";
+ 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_set_operations(cy_serial_driver, &cy_ops);
+
+ if (tty_register_driver(cy_serial_driver))
+ panic("Couldn't register Cyclades serial driver\n");
+
+ for (i = 0; i < NR_CARDS; i++) {
+ /* base_addr=0 indicates board not found */
+ cy_card[i].base_addr = NULL;
+ }
+
+ /* 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 */
+ cy_isa_nboard = cy_detect_isa();
+
+ /* look for pci boards */
+ cy_pci_nboard = cy_detect_pci();
+
+ cy_nboard = cy_isa_nboard + cy_pci_nboard;
+
+ /* invalidate remaining cy_card structures */
+ for (i = 0 ; i < NR_CARDS ; i++) {
+ if (cy_card[i].base_addr == 0) {
+ cy_card[i].first_line = -1;
+ cy_card[i].ctl_addr = NULL;
+ cy_card[i].irq = 0;
+ cy_card[i].bus_index = 0;
+ cy_card[i].first_line = 0;
+ cy_card[i].num_chips = 0;
+ }
+ }
+ /* invalidate remaining cy_port structures */
+ for (i = cy_next_channel ; i < NR_PORTS ; i++) {
+ cy_port[i].line = -1;
+ cy_port[i].magic = -1;
+ }
+
+ /* initialize per-port data structures for each valid board found */
+ for (board = 0 ; board < cy_nboard ; board++) {
+ cinfo = &cy_card[board];
+ if (cinfo->num_chips == -1) { /* Cyclades-Z */
+ number_z_boards++;
+ mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
+ cy_card[board].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 */
+ spin_lock_init(&cinfo->card_lock);
+ for (port = cinfo->first_line ;
+ port < cinfo->first_line + nports;
+ port++)
+ {
+ info = &cy_port[port];
+ info->magic = CYCLADES_MAGIC;
+ info->type = PORT_STARTECH;
+ info->card = board;
+ info->line = port;
+ info->chip_rev = 0;
+ info->flags = STD_COM_FLAGS;
+ info->tty = NULL;
+ if (mailbox == ZO_V1)
+ info->xmit_fifo_size = CYZ_FIFO_SIZE;
+ else
+ info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
+ info->cor1 = 0;
+ info->cor2 = 0;
+ info->cor3 = 0;
+ info->cor4 = 0;
+ info->cor5 = 0;
+ info->tbpr = 0;
+ info->tco = 0;
+ info->rbpr = 0;
+ info->rco = 0;
+ info->custom_divisor = 0;
+ info->close_delay = 5*HZ/10;
+ info->closing_wait = CLOSING_WAIT_DELAY;
+ info->icount.cts = info->icount.dsr =
+ info->icount.rng = info->icount.dcd = 0;
+ info->icount.rx = info->icount.tx = 0;
+ info->icount.frame = info->icount.parity = 0;
+ info->icount.overrun = info->icount.brk = 0;
+ info->x_char = 0;
+ info->event = 0;
+ info->count = 0;
+ info->blocked_open = 0;
+ info->default_threshold = 0;
+ info->default_timeout = 0;
+ INIT_WORK(&info->tqueue, do_softint, info);
+ init_waitqueue_head(&info->open_wait);
+ init_waitqueue_head(&info->close_wait);
+ init_waitqueue_head(&info->shutdown_wait);
+ init_waitqueue_head(&info->delta_msr_wait);
+ /* info->session */
+ /* info->pgrp */
+ info->read_status_mask = 0;
+ /* info->timeout */
+ /* Bentson's vars */
+ info->jiffies[0] = 0;
+ info->jiffies[1] = 0;
+ info->jiffies[2] = 0;
+ info->rflush_count = 0;
+#ifdef CONFIG_CYZ_INTR
+ init_timer(&cyz_rx_full_timer[port]);
+ cyz_rx_full_timer[port].function = NULL;
+#endif
+ }
+ continue;
+ }else{ /* Cyclom-Y of some kind*/
+ index = cinfo->bus_index;
+ spin_lock_init(&cinfo->card_lock);
+ cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
+ for (port = cinfo->first_line ;
+ port < cinfo->first_line + cinfo->nports ;
+ port++)
+ {
+ info = &cy_port[port];
+ info->magic = CYCLADES_MAGIC;
+ info->type = PORT_CIRRUS;
+ info->card = board;
+ info->line = port;
+ info->flags = STD_COM_FLAGS;
+ info->tty = NULL;
+ 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 */
+ info->cor4 = 0;
+ info->cor5 = 0;
+ info->custom_divisor = 0;
+ info->close_delay = 5*HZ/10;
+ info->closing_wait = CLOSING_WAIT_DELAY;
+ info->icount.cts = info->icount.dsr =
+ info->icount.rng = info->icount.dcd = 0;
+ info->icount.rx = info->icount.tx = 0;
+ info->icount.frame = info->icount.parity = 0;
+ info->icount.overrun = info->icount.brk = 0;
+ chip_number = (port - cinfo->first_line) / 4;
+ if ((info->chip_rev =
+ cy_readb(cinfo->base_addr +
+ (cy_chip_offset[chip_number]<<index) +
+ (CyGFRCR<<index))) >= 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->rflow = 0;
+ 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->rflow = 0;
+ info->rtsdtr_inv = 0;
+ }
+ info->x_char = 0;
+ info->event = 0;
+ info->count = 0;
+ info->blocked_open = 0;
+ info->default_threshold = 0;
+ info->default_timeout = 0;
+ INIT_WORK(&info->tqueue, do_softint, info);
+ init_waitqueue_head(&info->open_wait);
+ init_waitqueue_head(&info->close_wait);
+ init_waitqueue_head(&info->shutdown_wait);
+ init_waitqueue_head(&info->delta_msr_wait);
+ /* info->session */
+ /* info->pgrp */
+ info->read_status_mask =
+ CyTIMEOUT| CySPECHAR| CyBREAK
+ | CyPARITY| CyFRAME| CyOVERRUN;
+ /* info->timeout */
+ }
+ }
+ }
+
+#ifndef CONFIG_CYZ_INTR
+ if (number_z_boards && !cyz_timeron){
+ cyz_timeron++;
+ cyz_timerlist.expires = jiffies + 1;
+ add_timer(&cyz_timerlist);
+#ifdef CY_PCI_DEBUG
+ printk("Cyclades-Z polling initialized\n");
+#endif
+ }
+#endif /* CONFIG_CYZ_INTR */
+
+ return 0;
+
+} /* cy_init */
+
+static void __exit
+cy_cleanup_module(void)
+{
+ int i, e1;
+
+#ifndef CONFIG_CYZ_INTR
+ if (cyz_timeron){
+ cyz_timeron = 0;
+ del_timer(&cyz_timerlist);
+ }
+#endif /* CONFIG_CYZ_INTR */
+
+ if ((e1 = tty_unregister_driver(cy_serial_driver)))
+ printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
+ e1);
+
+ put_tty_driver(cy_serial_driver);
+
+ for (i = 0; i < NR_CARDS; i++) {
+ if (cy_card[i].base_addr) {
+ iounmap(cy_card[i].base_addr);
+ if (cy_card[i].ctl_addr)
+ iounmap(cy_card[i].ctl_addr);
+ if (cy_card[i].irq
+#ifndef CONFIG_CYZ_INTR
+ && cy_card[i].num_chips != -1 /* not a Z card */
+#endif /* CONFIG_CYZ_INTR */
+ )
+ free_irq(cy_card[i].irq, &cy_card[i]);
+#ifdef CONFIG_PCI
+ if (cy_card[i].pdev)
+ pci_release_regions(cy_card[i].pdev);
+#endif
+ }
+ }
+ if (tmp_buf) {
+ free_page((unsigned long) tmp_buf);
+ tmp_buf = NULL;
+ }
+} /* cy_cleanup_module */
+
+module_init(cy_init);
+module_exit(cy_cleanup_module);
+
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-21 09:40:27 +0300