| #undef BLOCKMOVE |
| #define Z_WAKE |
| #undef Z_EXT_CHARS_IN_BUFFER |
| |
| /* |
| * linux/drivers/char/cyclades.c |
| * |
| * This file contains the driver for the Cyclades async multiport |
| * serial boards. |
| * |
| * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>. |
| * Modified and maintained by Marcio Saito <marcio@cyclades.com>. |
| * |
| * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com> |
| * |
| * Much of the design and some of the code came from serial.c |
| * which was copyright (C) 1991, 1992 Linus Torvalds. It was |
| * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92, |
| * and then fixed as suggested by Michael K. Johnson 12/12/92. |
| * Converted to pci probing and cleaned up by Jiri Slaby. |
| * |
| * This version supports shared IRQ's (only for PCI boards). |
| * |
| * Prevent users from opening non-existing Z ports. |
| * |
| * Revision 2.3.2.8 2000/07/06 18:14:16 ivan |
| * Fixed the PCI detection function to work properly on Alpha systems. |
| * Implemented support for TIOCSERGETLSR ioctl. |
| * Implemented full support for non-standard baud rates. |
| * |
| * Revision 2.3.2.7 2000/06/01 18:26:34 ivan |
| * Request PLX I/O region, although driver doesn't use it, to avoid |
| * problems with other drivers accessing it. |
| * Removed count for on-board buffer characters in cy_chars_in_buffer |
| * (Cyclades-Z only). |
| * |
| * Revision 2.3.2.6 2000/05/05 13:56:05 ivan |
| * Driver now reports physical instead of virtual memory addresses. |
| * Masks were added to some Cyclades-Z read accesses. |
| * Implemented workaround for PLX9050 bug that would cause a system lockup |
| * in certain systems, depending on the MMIO addresses allocated to the |
| * board. |
| * Changed the Tx interrupt programming in the CD1400 chips to boost up |
| * performance (Cyclom-Y only). |
| * Code is now compliant with the new module interface (module_[init|exit]). |
| * Make use of the PCI helper functions to access PCI resources. |
| * Did some code "housekeeping". |
| * |
| * Revision 2.3.2.5 2000/01/19 14:35:33 ivan |
| * Fixed bug in cy_set_termios on CRTSCTS flag turnoff. |
| * |
| * Revision 2.3.2.4 2000/01/17 09:19:40 ivan |
| * Fixed SMP locking in Cyclom-Y interrupt handler. |
| * |
| * Revision 2.3.2.3 1999/12/28 12:11:39 ivan |
| * Added a new cyclades_card field called nports to allow the driver to |
| * know the exact number of ports found by the Z firmware after its load; |
| * RX buffer contention prevention logic on interrupt op mode revisited |
| * (Cyclades-Z only); |
| * Revisited printk's for Z debug; |
| * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined; |
| * |
| * Revision 2.3.2.2 1999/10/01 11:27:43 ivan |
| * Fixed bug in cyz_poll that would make all ports but port 0 |
| * unable to transmit/receive data (Cyclades-Z only); |
| * Implemented logic to prevent the RX buffer from being stuck with data |
| * due to a driver / firmware race condition in interrupt op mode |
| * (Cyclades-Z only); |
| * Fixed bug in block_til_ready logic that would lead to a system crash; |
| * Revisited cy_close spinlock usage; |
| * |
| * Revision 2.3.2.1 1999/09/28 11:01:22 ivan |
| * Revisited CONFIG_PCI conditional compilation for PCI board support; |
| * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support; |
| * _Major_ cleanup on the Cyclades-Z interrupt support code / logic; |
| * Removed CTS handling from the driver -- this is now completely handled |
| * by the firmware (Cyclades-Z only); |
| * Flush RX on-board buffers on a port open (Cyclades-Z only); |
| * Fixed handling of ASYNC_SPD_* TTY flags; |
| * Module unload now unmaps all memory area allocated by ioremap; |
| * |
| * Revision 2.3.1.1 1999/07/15 16:45:53 ivan |
| * Removed CY_PROC conditional compilation; |
| * Implemented SMP-awareness for the driver; |
| * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off] |
| * functions; |
| * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs |
| * (irq=NN) as parameters (only for ISA boards); |
| * Fixed bug in set_line_char that would prevent the Cyclades-Z |
| * ports from being configured at speeds above 115.2Kbps; |
| * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control |
| * switching from working properly; |
| * The driver now only prints IRQ info for the Cyclades-Z if it's |
| * configured to work in interrupt mode; |
| * |
| * Revision 2.2.2.3 1999/06/28 11:13:29 ivan |
| * Added support for interrupt mode operation for the Z cards; |
| * Removed the driver inactivity control for the Z; |
| * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when |
| * the Z firmware is not loaded yet; |
| * Replaced the "manual" Z Tx flush buffer by a call to a FW command of |
| * same functionality; |
| * Implemented workaround for IRQ setting loss on the PCI configuration |
| * registers after a PCI bridge EEPROM reload (affects PLX9060 only); |
| * |
| * Revision 2.2.2.2 1999/05/14 17:18:15 ivan |
| * /proc entry location changed to /proc/tty/driver/cyclades; |
| * Added support to shared IRQ's (only for PCI boards); |
| * Added support for Cobalt Qube2 systems; |
| * IRQ [de]allocation scheme revisited; |
| * BREAK implementation changed in order to make use of the 'break_ctl' |
| * TTY facility; |
| * Fixed typo in TTY structure field 'driver_name'; |
| * Included a PCI bridge reset and EEPROM reload in the board |
| * initialization code (for both Y and Z series). |
| * |
| * Revision 2.2.2.1 1999/04/08 16:17:43 ivan |
| * Fixed a bug in cy_wait_until_sent that was preventing the port to be |
| * closed properly after a SIGINT; |
| * Module usage counter scheme revisited; |
| * Added support to the upcoming Y PCI boards (i.e., support to additional |
| * PCI Device ID's). |
| * |
| * Revision 2.2.1.10 1999/01/20 16:14:29 ivan |
| * Removed all unnecessary page-alignement operations in ioremap calls |
| * (ioremap is currently safe for these operations). |
| * |
| * Revision 2.2.1.9 1998/12/30 18:18:30 ivan |
| * Changed access to PLX PCI bridge registers from I/O to MMIO, in |
| * order to make PLX9050-based boards work with certain motherboards. |
| * |
| * Revision 2.2.1.8 1998/11/13 12:46:20 ivan |
| * cy_close function now resets (correctly) the tty->closing flag; |
| * JIFFIES_DIFF macro fixed. |
| * |
| * Revision 2.2.1.7 1998/09/03 12:07:28 ivan |
| * Fixed bug in cy_close function, which was not informing HW of |
| * which port should have the reception disabled before doing so; |
| * fixed Cyclom-8YoP hardware detection bug. |
| * |
| * Revision 2.2.1.6 1998/08/20 17:15:39 ivan |
| * Fixed bug in cy_close function, which causes malfunction |
| * of one of the first 4 ports when a higher port is closed |
| * (Cyclom-Y only). |
| * |
| * Revision 2.2.1.5 1998/08/10 18:10:28 ivan |
| * Fixed Cyclom-4Yo hardware detection bug. |
| * |
| * Revision 2.2.1.4 1998/08/04 11:02:50 ivan |
| * /proc/cyclades implementation with great collaboration of |
| * Marc Lewis <marc@blarg.net>; |
| * cyy_interrupt was changed to avoid occurrence of kernel oopses |
| * during PPP operation. |
| * |
| * Revision 2.2.1.3 1998/06/01 12:09:10 ivan |
| * General code review in order to comply with 2.1 kernel standards; |
| * data loss prevention for slow devices revisited (cy_wait_until_sent |
| * was created); |
| * removed conditional compilation for new/old PCI structure support |
| * (now the driver only supports the new PCI structure). |
| * |
| * Revision 2.2.1.1 1998/03/19 16:43:12 ivan |
| * added conditional compilation for new/old PCI structure support; |
| * removed kernel series (2.0.x / 2.1.x) conditional compilation. |
| * |
| * Revision 2.1.1.3 1998/03/16 18:01:12 ivan |
| * cleaned up the data loss fix; |
| * fixed XON/XOFF handling once more (Cyclades-Z); |
| * general review of the driver routines; |
| * introduction of a mechanism to prevent data loss with slow |
| * printers, by forcing a delay before closing the port. |
| * |
| * Revision 2.1.1.2 1998/02/17 16:50:00 ivan |
| * fixed detection/handling of new CD1400 in Ye boards; |
| * fixed XON/XOFF handling (Cyclades-Z); |
| * fixed data loss caused by a premature port close; |
| * introduction of a flag that holds the CD1400 version ID per port |
| * (used by the CYGETCD1400VER new ioctl). |
| * |
| * Revision 2.1.1.1 1997/12/03 17:31:19 ivan |
| * Code review for the module cleanup routine; |
| * fixed RTS and DTR status report for new CD1400's in get_modem_info; |
| * includes anonymous changes regarding signal_pending. |
| * |
| * Revision 2.1 1997/11/01 17:42:41 ivan |
| * Changes in the driver to support Alpha systems (except 8Zo V_1); |
| * BREAK fix for the Cyclades-Z boards; |
| * driver inactivity control by FW implemented; |
| * introduction of flag that allows driver to take advantage of |
| * a special CD1400 feature related to HW flow control; |
| * added support for the CD1400 rev. J (Cyclom-Y boards); |
| * introduction of ioctls to: |
| * - control the rtsdtr_inv flag (Cyclom-Y); |
| * - control the rflow flag (Cyclom-Y); |
| * - adjust the polling interval (Cyclades-Z); |
| * |
| * Revision 1.36.4.33 1997/06/27 19:00:00 ivan |
| * Fixes related to kernel version conditional |
| * compilation. |
| * |
| * Revision 1.36.4.32 1997/06/14 19:30:00 ivan |
| * Compatibility issues between kernels 2.0.x and |
| * 2.1.x (mainly related to clear_bit function). |
| * |
| * Revision 1.36.4.31 1997/06/03 15:30:00 ivan |
| * Changes to define the memory window according to the |
| * board type. |
| * |
| * Revision 1.36.4.30 1997/05/16 15:30:00 daniel |
| * Changes to support new cycladesZ boards. |
| * |
| * Revision 1.36.4.29 1997/05/12 11:30:00 daniel |
| * Merge of Bentson's and Daniel's version 1.36.4.28. |
| * Corrects bug in cy_detect_pci: check if there are more |
| * ports than the number of static structs allocated. |
| * Warning message during initialization if this driver is |
| * used with the new generation of cycladesZ boards. Those |
| * will be supported only in next release of the driver. |
| * Corrects bug in cy_detect_pci and cy_detect_isa that |
| * returned wrong number of VALID boards, when a cyclomY |
| * was found with no serial modules connected. |
| * Changes to use current (2.1.x) kernel subroutine names |
| * and created macros for compilation with 2.0.x kernel, |
| * instead of the other way around. |
| * |
| * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson |
| * Change queue_task_irq_off to queue_task_irq. |
| * The inline function queue_task_irq_off (tqueue.h) |
| * was removed from latest releases of 2.1.x kernel. |
| * Use of macro __init to mark the initialization |
| * routines, so memory can be reused. |
| * Also incorporate implementation of critical region |
| * in function cleanup_module() created by anonymous |
| * linuxer. |
| * |
| * Revision 1.36.4.28 1997/04/25 16:00:00 daniel |
| * Change to support new firmware that solves DCD problem: |
| * application could fail to receive SIGHUP signal when DCD |
| * varying too fast. |
| * |
| * Revision 1.36.4.27 1997/03/26 10:30:00 daniel |
| * Changed for support linux versions 2.1.X. |
| * Backward compatible with linux versions 2.0.X. |
| * Corrected illegal use of filler field in |
| * CH_CTRL struct. |
| * Deleted some debug messages. |
| * |
| * Revision 1.36.4.26 1997/02/27 12:00:00 daniel |
| * Included check for NULL tty pointer in cyz_poll. |
| * |
| * Revision 1.36.4.25 1997/02/26 16:28:30 bentson |
| * Bill Foster at Blarg! Online services noticed that |
| * some of the switch elements of -Z modem control |
| * lacked a closing "break;" |
| * |
| * Revision 1.36.4.24 1997/02/24 11:00:00 daniel |
| * Changed low water threshold for buffer xmit_buf |
| * |
| * Revision 1.36.4.23 1996/12/02 21:50:16 bentson |
| * Marcio provided fix to modem status fetch for -Z |
| * |
| * Revision 1.36.4.22 1996/10/28 22:41:17 bentson |
| * improve mapping of -Z control page (thanks to Steve |
| * Price <stevep@fa.tdktca.com> for help on this) |
| * |
| * Revision 1.36.4.21 1996/09/10 17:00:10 bentson |
| * shift from CPU-bound to memcopy in cyz_polling operation |
| * |
| * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson |
| * Added support to set and report higher speeds. |
| * |
| * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito |
| * Some fixes in the HW flow control for the BETA release. |
| * Don't try to register the IRQ. |
| * |
| * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson |
| * make sure "cyc" appears in all kernel messages; all soft interrupts |
| * handled by same routine; recognize out-of-band reception; comment |
| * out some diagnostic messages; leave RTS/CTS flow control to hardware; |
| * fix race condition in -Z buffer management; only -Y needs to explicitly |
| * flush chars; tidy up some startup messages; |
| * |
| * Revision 1.36.4.18 1996/07/25 18:57:31 bentson |
| * shift MOD_INC_USE_COUNT location to match |
| * serial.c; purge some diagnostic messages; |
| * |
| * Revision 1.36.4.17 1996/07/25 18:01:08 bentson |
| * enable modem status messages and fetch & process them; note |
| * time of last activity type for each port; set_line_char now |
| * supports more than line 0 and treats 0 baud correctly; |
| * get_modem_info senses rs_status; |
| * |
| * Revision 1.36.4.16 1996/07/20 08:43:15 bentson |
| * barely works--now's time to turn on |
| * more features 'til it breaks |
| * |
| * Revision 1.36.4.15 1996/07/19 22:30:06 bentson |
| * check more -Z board status; shorten boot message |
| * |
| * Revision 1.36.4.14 1996/07/19 22:20:37 bentson |
| * fix reference to ch_ctrl in startup; verify return |
| * values from cyz_issue_cmd and cyz_update_channel; |
| * more stuff to get modem control correct; |
| * |
| * Revision 1.36.4.13 1996/07/11 19:53:33 bentson |
| * more -Z stuff folded in; re-order changes to put -Z stuff |
| * after -Y stuff (to make changes clearer) |
| * |
| * Revision 1.36.4.12 1996/07/11 15:40:55 bentson |
| * Add code to poll Cyclades-Z. Add code to get & set RS-232 control. |
| * Add code to send break. Clear firmware ID word at startup (so |
| * that other code won't talk to inactive board). |
| * |
| * Revision 1.36.4.11 1996/07/09 05:28:29 bentson |
| * add code for -Z in set_line_char |
| * |
| * Revision 1.36.4.10 1996/07/08 19:28:37 bentson |
| * fold more -Z stuff (or in some cases, error messages) |
| * into driver; add text to "don't know what to do" messages. |
| * |
| * Revision 1.36.4.9 1996/07/08 18:38:38 bentson |
| * moved compile-time flags near top of file; cosmetic changes |
| * to narrow text (to allow 2-up printing); changed many declarations |
| * to "static" to limit external symbols; shuffled code order to |
| * coalesce -Y and -Z specific code, also to put internal functions |
| * in order of tty_driver structure; added code to recognize -Z |
| * ports (and for moment, do nothing or report error); add cy_startup |
| * to parse boot command line for extra base addresses for ISA probes; |
| * |
| * Revision 1.36.4.8 1996/06/25 17:40:19 bentson |
| * reorder some code, fix types of some vars (int vs. long), |
| * add cy_setup to support user declared ISA addresses |
| * |
| * Revision 1.36.4.7 1996/06/21 23:06:18 bentson |
| * dump ioctl based firmware load (it's now a user level |
| * program); ensure uninitialzed ports cannot be used |
| * |
| * Revision 1.36.4.6 1996/06/20 23:17:19 bentson |
| * rename vars and restructure some code |
| * |
| * Revision 1.36.4.5 1996/06/14 15:09:44 bentson |
| * get right status back after boot load |
| * |
| * Revision 1.36.4.4 1996/06/13 19:51:44 bentson |
| * successfully loads firmware |
| * |
| * Revision 1.36.4.3 1996/06/13 06:08:33 bentson |
| * add more of the code for the boot/load ioctls |
| * |
| * Revision 1.36.4.2 1996/06/11 21:00:51 bentson |
| * start to add Z functionality--starting with ioctl |
| * for loading firmware |
| * |
| * Revision 1.36.4.1 1996/06/10 18:03:02 bentson |
| * added code to recognize Z/PCI card at initialization; report |
| * presence, but card is not initialized (because firmware needs |
| * to be loaded) |
| * |
| * Revision 1.36.3.8 1996/06/07 16:29:00 bentson |
| * starting minor number at zero; added missing verify_area |
| * as noted by Heiko Eißfeldt <heiko@colossus.escape.de> |
| * |
| * Revision 1.36.3.7 1996/04/19 21:06:18 bentson |
| * remove unneeded boot message & fix CLOCAL hardware flow |
| * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>); |
| * remove unused diagnostic statements; minor 0 is first; |
| * |
| * Revision 1.36.3.6 1996/03/13 13:21:17 marcio |
| * The kernel function vremap (available only in later 1.3.xx kernels) |
| * allows the access to memory addresses above the RAM. This revision |
| * of the driver supports PCI boards below 1Mb (device id 0x100) and |
| * above 1Mb (device id 0x101). |
| * |
| * Revision 1.36.3.5 1996/03/07 15:20:17 bentson |
| * Some global changes to interrupt handling spilled into |
| * this driver--mostly unused arguments in system function |
| * calls. Also added change by Marcio Saito which should |
| * reduce lost interrupts at startup by fast processors. |
| * |
| * Revision 1.36.3.4 1995/11/13 20:45:10 bentson |
| * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed |
| * in 1.3.41 kernel to remove a possible race condition, extend |
| * some error messages, and let the driver run as a loadable module |
| * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a |
| * possible race condition. |
| * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing. |
| * |
| * Revision 1.36.3.3 1995/11/13 19:44:48 bentson |
| * Changes by Linus Torvalds in 1.3.33 kernel distribution |
| * required due to reordering of driver initialization. |
| * Drivers are now initialized *after* memory management. |
| * |
| * Revision 1.36.3.2 1995/09/08 22:07:14 bentson |
| * remove printk from ISR; fix typo |
| * |
| * Revision 1.36.3.1 1995/09/01 12:00:42 marcio |
| * Minor fixes in the PCI board support. PCI function calls in |
| * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan |
| * <duncan@okay.com>. "bad serial count" message removed. |
| * |
| * Revision 1.36.3 1995/08/22 09:19:42 marcio |
| * Cyclom-Y/PCI support added. Changes in the cy_init routine and |
| * board initialization. Changes in the boot messages. The driver |
| * supports up to 4 boards and 64 ports by default. |
| * |
| * Revision 1.36.1.4 1995/03/29 06:14:14 bentson |
| * disambiguate between Cyclom-16Y and Cyclom-32Ye; |
| * |
| * Revision 1.36.1.3 1995/03/23 22:15:35 bentson |
| * add missing break in modem control block in ioctl switch statement |
| * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>); |
| * |
| * Revision 1.36.1.2 1995/03/22 19:16:22 bentson |
| * make sure CTS flow control is set as soon as possible (thanks |
| * to note from David Lambert <lambert@chesapeake.rps.slb.com>); |
| * |
| * Revision 1.36.1.1 1995/03/13 15:44:43 bentson |
| * initialize defaults for receive threshold and stale data timeout; |
| * cosmetic changes; |
| * |
| * Revision 1.36 1995/03/10 23:33:53 bentson |
| * added support of chips 4-7 in 32 port Cyclom-Ye; |
| * fix cy_interrupt pointer dereference problem |
| * (Joe Portman <baron@aa.net>); |
| * give better error response if open is attempted on non-existent port |
| * (Zachariah Vaum <jchryslr@netcom.com>); |
| * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>); |
| * conditional compilation for -16Y on systems with fast, noisy bus; |
| * comment out diagnostic print function; |
| * cleaned up table of base addresses; |
| * set receiver time-out period register to correct value, |
| * set receive threshold to better default values, |
| * set chip timer to more accurate 200 Hz ticking, |
| * add code to monitor and modify receive parameters |
| * (Rik Faith <faith@cs.unc.edu> Nick Simicich |
| * <njs@scifi.emi.net>); |
| * |
| * Revision 1.35 1994/12/16 13:54:18 steffen |
| * additional patch by Marcio Saito for board detection |
| * Accidently left out in 1.34 |
| * |
| * Revision 1.34 1994/12/10 12:37:12 steffen |
| * This is the corrected version as suggested by Marcio Saito |
| * |
| * Revision 1.33 1994/12/01 22:41:18 bentson |
| * add hooks to support more high speeds directly; add tytso |
| * patch regarding CLOCAL wakeups |
| * |
| * Revision 1.32 1994/11/23 19:50:04 bentson |
| * allow direct kernel control of higher signalling rates; |
| * look for cards at additional locations |
| * |
| * Revision 1.31 1994/11/16 04:33:28 bentson |
| * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com-- |
| * a problem in chars_in_buffer has been resolved by some |
| * small changes; this should yield smoother output |
| * |
| * Revision 1.30 1994/11/16 04:28:05 bentson |
| * Fix from Corey Minyard, Internet: minyard@metronet.com, |
| * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to |
| * cy_hangup that appears to clear up much (all?) of the |
| * DTR glitches; also he's added/cleaned-up diagnostic messages |
| * |
| * Revision 1.29 1994/11/16 04:16:07 bentson |
| * add change proposed by Ralph Sims, ralphs@halcyon.com, to |
| * operate higher speeds in same way as other serial ports; |
| * add more serial ports (for up to two 16-port muxes). |
| * |
| * Revision 1.28 1994/11/04 00:13:16 root |
| * turn off diagnostic messages |
| * |
| * Revision 1.27 1994/11/03 23:46:37 root |
| * bunch of changes to bring driver into greater conformance |
| * with the serial.c driver (looking for missed fixes) |
| * |
| * Revision 1.26 1994/11/03 22:40:36 root |
| * automatic interrupt probing fixed. |
| * |
| * Revision 1.25 1994/11/03 20:17:02 root |
| * start to implement auto-irq |
| * |
| * Revision 1.24 1994/11/03 18:01:55 root |
| * still working on modem signals--trying not to drop DTR |
| * during the getty/login processes |
| * |
| * Revision 1.23 1994/11/03 17:51:36 root |
| * extend baud rate support; set receive threshold as function |
| * of baud rate; fix some problems with RTS/CTS; |
| * |
| * Revision 1.22 1994/11/02 18:05:35 root |
| * changed arguments to udelay to type long to get |
| * delays to be of correct duration |
| * |
| * Revision 1.21 1994/11/02 17:37:30 root |
| * employ udelay (after calibrating loops_per_second earlier |
| * in init/main.c) instead of using home-grown delay routines |
| * |
| * Revision 1.20 1994/11/02 03:11:38 root |
| * cy_chars_in_buffer forces a return value of 0 to let |
| * login work (don't know why it does); some functions |
| * that were returning EFAULT, now executes the code; |
| * more work on deciding when to disable xmit interrupts; |
| * |
| * Revision 1.19 1994/11/01 20:10:14 root |
| * define routine to start transmission interrupts (by enabling |
| * transmit interrupts); directly enable/disable modem interrupts; |
| * |
| * Revision 1.18 1994/11/01 18:40:45 bentson |
| * Don't always enable transmit interrupts in startup; interrupt on |
| * TxMpty instead of TxRdy to help characters get out before shutdown; |
| * restructure xmit interrupt to check for chars first and quit if |
| * none are ready to go; modem status (MXVRx) is upright, _not_ inverted |
| * (to my view); |
| * |
| * Revision 1.17 1994/10/30 04:39:45 bentson |
| * rename serial_driver and callout_driver to cy_serial_driver and |
| * cy_callout_driver to avoid linkage interference; initialize |
| * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port |
| * from cyclades_port structure; add paranoia check to cy_close; |
| * |
| * Revision 1.16 1994/10/30 01:14:33 bentson |
| * change major numbers; add some _early_ return statements; |
| * |
| * Revision 1.15 1994/10/29 06:43:15 bentson |
| * final tidying up for clean compile; enable some error reporting |
| * |
| * Revision 1.14 1994/10/28 20:30:22 Bentson |
| * lots of changes to drag the driver towards the new tty_io |
| * structures and operation. not expected to work, but may |
| * compile cleanly. |
| * |
| * Revision 1.13 1994/07/21 23:08:57 Bentson |
| * add some diagnostic cruft; support 24 lines (for testing |
| * both -8Y and -16Y cards; be more thorough in servicing all |
| * chips during interrupt; add "volatile" a few places to |
| * circumvent compiler optimizations; fix base & offset |
| * computations in block_til_ready (was causing chip 0 to |
| * stop operation) |
| * |
| * Revision 1.12 1994/07/19 16:42:11 Bentson |
| * add some hackery for kernel version 1.1.8; expand |
| * error messages; refine timing for delay loops and |
| * declare loop params volatile |
| * |
| * Revision 1.11 1994/06/11 21:53:10 bentson |
| * get use of save_car right in transmit interrupt service |
| * |
| * Revision 1.10.1.1 1994/06/11 21:31:18 bentson |
| * add some diagnostic printing; try to fix save_car stuff |
| * |
| * Revision 1.10 1994/06/11 20:36:08 bentson |
| * clean up compiler warnings |
| * |
| * Revision 1.9 1994/06/11 19:42:46 bentson |
| * added a bunch of code to support modem signalling |
| * |
| * Revision 1.8 1994/06/11 17:57:07 bentson |
| * recognize break & parity error |
| * |
| * Revision 1.7 1994/06/05 05:51:34 bentson |
| * Reorder baud table to be monotonic; add cli to CP; discard |
| * incoming characters and status if the line isn't open; start to |
| * fold code into cy_throttle; start to port get_serial_info, |
| * set_serial_info, get_modem_info, set_modem_info, and send_break |
| * from serial.c; expand cy_ioctl; relocate and expand config_setup; |
| * get flow control characters from tty struct; invalidate ports w/o |
| * hardware; |
| * |
| * Revision 1.6 1994/05/31 18:42:21 bentson |
| * add a loop-breaker in the interrupt service routine; |
| * note when port is initialized so that it can be shut |
| * down under the right conditions; receive works without |
| * any obvious errors |
| * |
| * Revision 1.5 1994/05/30 00:55:02 bentson |
| * transmit works without obvious errors |
| * |
| * Revision 1.4 1994/05/27 18:46:27 bentson |
| * incorporated more code from lib_y.c; can now print short |
| * strings under interrupt control to port zero; seems to |
| * select ports/channels/lines correctly |
| * |
| * Revision 1.3 1994/05/25 22:12:44 bentson |
| * shifting from multi-port on a card to proper multiplexor |
| * data structures; added skeletons of most routines |
| * |
| * Revision 1.2 1994/05/19 13:21:43 bentson |
| * start to crib from other sources |
| * |
| */ |
| |
| #define CY_VERSION "2.5" |
| |
| /* If you need to install more boards than NR_CARDS, change the constant |
| in the definition below. No other change is necessary to support up to |
| eight boards. Beyond that you'll have to extend cy_isa_addresses. */ |
| |
| #define NR_CARDS 4 |
| |
| /* |
| If the total number of ports is larger than NR_PORTS, change this |
| constant in the definition below. No other change is necessary to |
| support more boards/ports. */ |
| |
| #define NR_PORTS 256 |
| |
| #define ZE_V1_NPORTS 64 |
| #define ZO_V1 0 |
| #define ZO_V2 1 |
| #define ZE_V1 2 |
| |
| #define SERIAL_PARANOIA_CHECK |
| #undef CY_DEBUG_OPEN |
| #undef CY_DEBUG_THROTTLE |
| #undef CY_DEBUG_OTHER |
| #undef CY_DEBUG_IO |
| #undef CY_DEBUG_COUNT |
| #undef CY_DEBUG_DTR |
| #undef CY_DEBUG_WAIT_UNTIL_SENT |
| #undef CY_DEBUG_INTERRUPTS |
| #undef CY_16Y_HACK |
| #undef CY_ENABLE_MONITORING |
| #undef CY_PCI_DEBUG |
| |
| /* |
| * Include section |
| */ |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/major.h> |
| #include <linux/string.h> |
| #include <linux/fcntl.h> |
| #include <linux/ptrace.h> |
| #include <linux/cyclades.h> |
| #include <linux/mm.h> |
| #include <linux/ioport.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/spinlock.h> |
| #include <linux/bitops.h> |
| #include <linux/firmware.h> |
| |
| #include <asm/system.h> |
| #include <linux/io.h> |
| #include <asm/irq.h> |
| #include <linux/uaccess.h> |
| |
| #include <linux/kernel.h> |
| #include <linux/pci.h> |
| |
| #include <linux/stat.h> |
| #include <linux/proc_fs.h> |
| |
| static void cy_throttle(struct tty_struct *tty); |
| static void cy_send_xchar(struct tty_struct *tty, char ch); |
| |
| #define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1) |
| |
| #define Z_FPGA_CHECK(card) \ |
| ((readl(&((struct RUNTIME_9060 __iomem *) \ |
| ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0) |
| |
| #define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \ |
| ((card).ctl_addr))->mail_box_0)) || \ |
| Z_FPGA_CHECK(card)) && \ |
| (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \ |
| ((card).base_addr+ID_ADDRESS))->signature))) |
| |
| #ifndef SERIAL_XMIT_SIZE |
| #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096)) |
| #endif |
| #define WAKEUP_CHARS 256 |
| |
| #define STD_COM_FLAGS (0) |
| |
| /* firmware stuff */ |
| #define ZL_MAX_BLOCKS 16 |
| #define DRIVER_VERSION 0x02010203 |
| #define RAM_SIZE 0x80000 |
| |
| #define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0) |
| |
| enum zblock_type { |
| ZBLOCK_PRG = 0, |
| ZBLOCK_FPGA = 1 |
| }; |
| |
| struct zfile_header { |
| char name[64]; |
| char date[32]; |
| char aux[32]; |
| u32 n_config; |
| u32 config_offset; |
| u32 n_blocks; |
| u32 block_offset; |
| u32 reserved[9]; |
| } __attribute__ ((packed)); |
| |
| struct zfile_config { |
| char name[64]; |
| u32 mailbox; |
| u32 function; |
| u32 n_blocks; |
| u32 block_list[ZL_MAX_BLOCKS]; |
| } __attribute__ ((packed)); |
| |
| struct zfile_block { |
| u32 type; |
| u32 file_offset; |
| u32 ram_offset; |
| u32 size; |
| } __attribute__ ((packed)); |
| |
| static struct tty_driver *cy_serial_driver; |
| |
| #ifdef CONFIG_ISA |
| /* This is the address lookup table. The driver will probe for |
| Cyclom-Y/ISA boards at all addresses in here. If you want the |
| driver to probe addresses at a different address, add it to |
| this table. If the driver is probing some other board and |
| causing problems, remove the offending address from this table. |
| */ |
| |
| static unsigned int cy_isa_addresses[] = { |
| 0xD0000, |
| 0xD2000, |
| 0xD4000, |
| 0xD6000, |
| 0xD8000, |
| 0xDA000, |
| 0xDC000, |
| 0xDE000, |
| 0, 0, 0, 0, 0, 0, 0, 0 |
| }; |
| |
| #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses) |
| |
| #ifdef MODULE |
| static long maddr[NR_CARDS]; |
| static int irq[NR_CARDS]; |
| |
| module_param_array(maddr, long, NULL, 0); |
| module_param_array(irq, int, NULL, 0); |
| #endif |
| |
| #endif /* CONFIG_ISA */ |
| |
| /* This is the per-card data structure containing address, irq, number of |
| channels, etc. This driver supports a maximum of NR_CARDS cards. |
| */ |
| static struct cyclades_card cy_card[NR_CARDS]; |
| |
| static int cy_next_channel; /* next minor available */ |
| |
| /* |
| * This is used to look up the divisor speeds and the timeouts |
| * We're normally limited to 15 distinct baud rates. The extra |
| * are accessed via settings in info->flags. |
| * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, |
| * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| * HI VHI |
| * 20 |
| */ |
| static int baud_table[] = { |
| 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, |
| 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000, |
| 230400, 0 |
| }; |
| |
| static char baud_co_25[] = { /* 25 MHz clock option table */ |
| /* value => 00 01 02 03 04 */ |
| /* divide by 8 32 128 512 2048 */ |
| 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02, |
| 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
| }; |
| |
| static char baud_bpr_25[] = { /* 25 MHz baud rate period table */ |
| 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3, |
| 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15 |
| }; |
| |
| static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */ |
| /* value => 00 01 02 03 04 */ |
| /* divide by 8 32 128 512 2048 */ |
| 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, |
| 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00 |
| }; |
| |
| static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */ |
| 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62, |
| 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32, |
| 0x21 |
| }; |
| |
| static char baud_cor3[] = { /* receive threshold */ |
| 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
| 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07, |
| 0x07 |
| }; |
| |
| /* |
| * The Cyclades driver implements HW flow control as any serial driver. |
| * The cyclades_port structure member rflow and the vector rflow_thr |
| * allows us to take advantage of a special feature in the CD1400 to avoid |
| * data loss even when the system interrupt latency is too high. These flags |
| * are to be used only with very special applications. Setting these flags |
| * requires the use of a special cable (DTR and RTS reversed). In the new |
| * CD1400-based boards (rev. 6.00 or later), there is no need for special |
| * cables. |
| */ |
| |
| static char rflow_thr[] = { /* rflow threshold */ |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, |
| 0x0a |
| }; |
| |
| /* The Cyclom-Ye has placed the sequential chips in non-sequential |
| * address order. This look-up table overcomes that problem. |
| */ |
| static int cy_chip_offset[] = { 0x0000, |
| 0x0400, |
| 0x0800, |
| 0x0C00, |
| 0x0200, |
| 0x0600, |
| 0x0A00, |
| 0x0E00 |
| }; |
| |
| /* PCI related definitions */ |
| |
| #ifdef CONFIG_PCI |
| static struct pci_device_id cy_pci_dev_id[] __devinitdata = { |
| /* PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, |
| /* PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, |
| /* 4Y PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, |
| /* 4Y PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, |
| /* 8Y PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, |
| /* 8Y PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, |
| /* Z PCI < 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, |
| /* Z PCI > 1Mb */ |
| { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, |
| { } /* end of table */ |
| }; |
| MODULE_DEVICE_TABLE(pci, cy_pci_dev_id); |
| #endif |
| |
| static void cy_start(struct tty_struct *); |
| static void set_line_char(struct cyclades_port *); |
| static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32); |
| #ifdef CONFIG_ISA |
| static unsigned detect_isa_irq(void __iomem *); |
| #endif /* CONFIG_ISA */ |
| |
| static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *); |
| |
| #ifndef CONFIG_CYZ_INTR |
| static void cyz_poll(unsigned long); |
| |
| /* The Cyclades-Z polling cycle is defined by this variable */ |
| static long cyz_polling_cycle = CZ_DEF_POLL; |
| |
| static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0); |
| |
| #else /* CONFIG_CYZ_INTR */ |
| static void cyz_rx_restart(unsigned long); |
| static struct timer_list cyz_rx_full_timer[NR_PORTS]; |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| static inline int serial_paranoia_check(struct cyclades_port *info, |
| char *name, const char *routine) |
| { |
| #ifdef SERIAL_PARANOIA_CHECK |
| if (!info) { |
| printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) " |
| "in %s\n", name, routine); |
| return 1; |
| } |
| |
| if (info->magic != CYCLADES_MAGIC) { |
| printk(KERN_WARNING "cyc Warning: bad magic number for serial " |
| "struct (%s) in %s\n", name, routine); |
| return 1; |
| } |
| #endif |
| return 0; |
| } /* serial_paranoia_check */ |
| |
| /***********************************************************/ |
| /********* Start of block of Cyclom-Y specific code ********/ |
| |
| /* This routine waits up to 1000 micro-seconds for the previous |
| command to the Cirrus chip to complete and then issues the |
| new command. An error is returned if the previous command |
| didn't finish within the time limit. |
| |
| This function is only called from inside spinlock-protected code. |
| */ |
| static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index) |
| { |
| unsigned int i; |
| |
| /* Check to see that the previous command has completed */ |
| for (i = 0; i < 100; i++) { |
| if (readb(base_addr + (CyCCR << index)) == 0) |
| break; |
| udelay(10L); |
| } |
| /* if the CCR never cleared, the previous command |
| didn't finish within the "reasonable time" */ |
| if (i == 100) |
| return -1; |
| |
| /* Issue the new command */ |
| cy_writeb(base_addr + (CyCCR << index), cmd); |
| |
| return 0; |
| } /* cyy_issue_cmd */ |
| |
| #ifdef CONFIG_ISA |
| /* ISA interrupt detection code */ |
| static unsigned detect_isa_irq(void __iomem *address) |
| { |
| int irq; |
| unsigned long irqs, flags; |
| int save_xir, save_car; |
| int index = 0; /* IRQ probing is only for ISA */ |
| |
| /* forget possible initially masked and pending IRQ */ |
| irq = probe_irq_off(probe_irq_on()); |
| |
| /* Clear interrupts on the board first */ |
| cy_writeb(address + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| |
| irqs = probe_irq_on(); |
| /* Wait ... */ |
| udelay(5000L); |
| |
| /* Enable the Tx interrupts on the CD1400 */ |
| local_irq_save(flags); |
| cy_writeb(address + (CyCAR << index), 0); |
| cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index); |
| |
| cy_writeb(address + (CyCAR << index), 0); |
| cy_writeb(address + (CySRER << index), |
| readb(address + (CySRER << index)) | CyTxRdy); |
| local_irq_restore(flags); |
| |
| /* Wait ... */ |
| udelay(5000L); |
| |
| /* Check which interrupt is in use */ |
| irq = probe_irq_off(irqs); |
| |
| /* Clean up */ |
| save_xir = (u_char) readb(address + (CyTIR << index)); |
| save_car = readb(address + (CyCAR << index)); |
| cy_writeb(address + (CyCAR << index), (save_xir & 0x3)); |
| cy_writeb(address + (CySRER << index), |
| readb(address + (CySRER << index)) & ~CyTxRdy); |
| cy_writeb(address + (CyTIR << index), (save_xir & 0x3f)); |
| cy_writeb(address + (CyCAR << index), (save_car)); |
| cy_writeb(address + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| |
| return (irq > 0) ? irq : 0; |
| } |
| #endif /* CONFIG_ISA */ |
| |
| static void cyy_chip_rx(struct cyclades_card *cinfo, int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| struct tty_struct *tty; |
| int len, index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, data, char_count; |
| |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip); |
| #endif |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyRIR << index)); |
| channel = save_xir & CyIRChannel; |
| info = &cinfo->ports[channel + chip * 4]; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| /* if there is nowhere to put the data, discard it */ |
| if (info->tty == NULL) { |
| if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == |
| CyIVRRxEx) { /* exception */ |
| data = readb(base_addr + (CyRDSR << index)); |
| } else { /* normal character reception */ |
| char_count = readb(base_addr + (CyRDCR << index)); |
| while (char_count--) |
| data = readb(base_addr + (CyRDSR << index)); |
| } |
| goto end; |
| } |
| /* there is an open port for this data */ |
| tty = info->tty; |
| if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) == |
| CyIVRRxEx) { /* exception */ |
| data = readb(base_addr + (CyRDSR << index)); |
| |
| /* For statistics only */ |
| if (data & CyBREAK) |
| info->icount.brk++; |
| else if (data & CyFRAME) |
| info->icount.frame++; |
| else if (data & CyPARITY) |
| info->icount.parity++; |
| else if (data & CyOVERRUN) |
| info->icount.overrun++; |
| |
| if (data & info->ignore_status_mask) { |
| info->icount.rx++; |
| return; |
| } |
| if (tty_buffer_request_room(tty, 1)) { |
| if (data & info->read_status_mask) { |
| if (data & CyBREAK) { |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_BREAK); |
| info->icount.rx++; |
| if (info->flags & ASYNC_SAK) |
| do_SAK(tty); |
| } else if (data & CyFRAME) { |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_FRAME); |
| info->icount.rx++; |
| info->idle_stats.frame_errs++; |
| } else if (data & CyPARITY) { |
| /* Pieces of seven... */ |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_PARITY); |
| info->icount.rx++; |
| info->idle_stats.parity_errs++; |
| } else if (data & CyOVERRUN) { |
| tty_insert_flip_char(tty, 0, |
| TTY_OVERRUN); |
| info->icount.rx++; |
| /* If the flip buffer itself is |
| overflowing, we still lose |
| the next incoming character. |
| */ |
| tty_insert_flip_char(tty, |
| readb(base_addr + (CyRDSR << |
| index)), TTY_FRAME); |
| info->icount.rx++; |
| info->idle_stats.overruns++; |
| /* These two conditions may imply */ |
| /* a normal read should be done. */ |
| /* } else if(data & CyTIMEOUT) { */ |
| /* } else if(data & CySPECHAR) { */ |
| } else { |
| tty_insert_flip_char(tty, 0, |
| TTY_NORMAL); |
| info->icount.rx++; |
| } |
| } else { |
| tty_insert_flip_char(tty, 0, TTY_NORMAL); |
| info->icount.rx++; |
| } |
| } else { |
| /* there was a software buffer overrun and nothing |
| * could be done about it!!! */ |
| info->icount.buf_overrun++; |
| info->idle_stats.overruns++; |
| } |
| } else { /* normal character reception */ |
| /* load # chars available from the chip */ |
| char_count = readb(base_addr + (CyRDCR << index)); |
| |
| #ifdef CY_ENABLE_MONITORING |
| ++info->mon.int_count; |
| info->mon.char_count += char_count; |
| if (char_count > info->mon.char_max) |
| info->mon.char_max = char_count; |
| info->mon.char_last = char_count; |
| #endif |
| len = tty_buffer_request_room(tty, char_count); |
| while (len--) { |
| data = readb(base_addr + (CyRDSR << index)); |
| tty_insert_flip_char(tty, data, TTY_NORMAL); |
| info->idle_stats.recv_bytes++; |
| info->icount.rx++; |
| #ifdef CY_16Y_HACK |
| udelay(10L); |
| #endif |
| } |
| info->idle_stats.recv_idle = jiffies; |
| } |
| tty_schedule_flip(tty); |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| int char_count, index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, outch; |
| |
| /* Since we only get here when the transmit buffer |
| is empty, we know we can always stuff a dozen |
| characters. */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip); |
| #endif |
| |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyTIR << index)); |
| channel = save_xir & CyIRChannel; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| /* validate the port# (as configured and open) */ |
| if (channel + chip * 4 >= cinfo->nports) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyTxRdy); |
| goto end; |
| } |
| info = &cinfo->ports[channel + chip * 4]; |
| if (info->tty == NULL) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyTxRdy); |
| goto end; |
| } |
| |
| /* load the on-chip space for outbound data */ |
| char_count = info->xmit_fifo_size; |
| |
| if (info->x_char) { /* send special char */ |
| outch = info->x_char; |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| char_count--; |
| info->icount.tx++; |
| info->x_char = 0; |
| } |
| |
| if (info->breakon || info->breakoff) { |
| if (info->breakon) { |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| cy_writeb(base_addr + (CyTDR << index), 0x81); |
| info->breakon = 0; |
| char_count -= 2; |
| } |
| if (info->breakoff) { |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| cy_writeb(base_addr + (CyTDR << index), 0x83); |
| info->breakoff = 0; |
| char_count -= 2; |
| } |
| } |
| |
| while (char_count-- > 0) { |
| if (!info->xmit_cnt) { |
| if (readb(base_addr + (CySRER << index)) & CyTxMpty) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxMpty); |
| } else { |
| cy_writeb(base_addr + (CySRER << index), |
| (readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy) | CyTxMpty); |
| } |
| goto done; |
| } |
| if (info->xmit_buf == NULL) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| goto done; |
| } |
| if (info->tty->stopped || info->tty->hw_stopped) { |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| goto done; |
| } |
| /* Because the Embedded Transmit Commands have been enabled, |
| * we must check to see if the escape character, NULL, is being |
| * sent. If it is, we must ensure that there is room for it to |
| * be doubled in the output stream. Therefore we no longer |
| * advance the pointer when the character is fetched, but |
| * rather wait until after the check for a NULL output |
| * character. This is necessary because there may not be room |
| * for the two chars needed to send a NULL.) |
| */ |
| outch = info->xmit_buf[info->xmit_tail]; |
| if (outch) { |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| info->icount.tx++; |
| } else { |
| if (char_count > 1) { |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| cy_writeb(base_addr + (CyTDR << index), outch); |
| cy_writeb(base_addr + (CyTDR << index), 0); |
| info->icount.tx++; |
| char_count--; |
| } |
| } |
| } |
| |
| done: |
| tty_wakeup(info->tty); |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| static void cyy_chip_modem(struct cyclades_card *cinfo, int chip, |
| void __iomem *base_addr) |
| { |
| struct cyclades_port *info; |
| int index = cinfo->bus_index; |
| u8 save_xir, channel, save_car, mdm_change, mdm_status; |
| |
| /* determine the channel & change to that context */ |
| save_xir = readb(base_addr + (CyMIR << index)); |
| channel = save_xir & CyIRChannel; |
| info = &cinfo->ports[channel + chip * 4]; |
| save_car = readb(base_addr + (CyCAR << index)); |
| cy_writeb(base_addr + (CyCAR << index), save_xir); |
| |
| mdm_change = readb(base_addr + (CyMISR << index)); |
| mdm_status = readb(base_addr + (CyMSVR1 << index)); |
| |
| if (!info->tty) |
| goto end; |
| |
| if (mdm_change & CyANY_DELTA) { |
| /* For statistics only */ |
| if (mdm_change & CyDCD) |
| info->icount.dcd++; |
| if (mdm_change & CyCTS) |
| info->icount.cts++; |
| if (mdm_change & CyDSR) |
| info->icount.dsr++; |
| if (mdm_change & CyRI) |
| info->icount.rng++; |
| |
| wake_up_interruptible(&info->delta_msr_wait); |
| } |
| |
| if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) { |
| if (!(mdm_status & CyDCD)) { |
| tty_hangup(info->tty); |
| info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| } |
| wake_up_interruptible(&info->open_wait); |
| } |
| 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), |
| readb(base_addr + (CySRER << index)) | |
| CyTxRdy); |
| tty_wakeup(info->tty); |
| } |
| } else { |
| if (!(mdm_status & CyCTS)) { |
| /* cy_stop isn't used |
| because ... !!! */ |
| info->tty->hw_stopped = 1; |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & |
| ~CyTxRdy); |
| } |
| } |
| } |
| /* if (mdm_change & CyDSR) { |
| } |
| if (mdm_change & CyRI) { |
| }*/ |
| end: |
| /* end of service */ |
| cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f); |
| cy_writeb(base_addr + (CyCAR << index), save_car); |
| } |
| |
| /* The real interrupt service routine is called |
| whenever the card wants its hand held--chars |
| received, out buffer empty, modem change, etc. |
| */ |
| static irqreturn_t cyy_interrupt(int irq, void *dev_id) |
| { |
| int status; |
| struct cyclades_card *cinfo = dev_id; |
| void __iomem *base_addr, *card_base_addr; |
| unsigned int chip, too_many, had_work; |
| int index; |
| |
| if (unlikely(cinfo == NULL)) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n", |
| irq); |
| #endif |
| return IRQ_NONE; /* spurious interrupt */ |
| } |
| |
| card_base_addr = cinfo->base_addr; |
| index = cinfo->bus_index; |
| |
| /* card was not initialized yet (e.g. DEBUG_SHIRQ) */ |
| if (unlikely(card_base_addr == NULL)) |
| return IRQ_HANDLED; |
| |
| /* This loop checks all chips in the card. Make a note whenever |
| _any_ chip had some work to do, as this is considered an |
| indication that there will be more to do. Only when no chip |
| has any work does this outermost loop exit. |
| */ |
| do { |
| had_work = 0; |
| for (chip = 0; chip < cinfo->num_chips; chip++) { |
| base_addr = cinfo->base_addr + |
| (cy_chip_offset[chip] << index); |
| too_many = 0; |
| while ((status = readb(base_addr + |
| (CySVRR << index))) != 0x00) { |
| had_work++; |
| /* The purpose of the following test is to ensure that |
| no chip can monopolize the driver. This forces the |
| chips to be checked in a round-robin fashion (after |
| draining each of a bunch (1000) of characters). |
| */ |
| if (1000 < too_many++) |
| break; |
| spin_lock(&cinfo->card_lock); |
| if (status & CySRReceive) /* rx intr */ |
| cyy_chip_rx(cinfo, chip, base_addr); |
| if (status & CySRTransmit) /* tx intr */ |
| cyy_chip_tx(cinfo, chip, base_addr); |
| if (status & CySRModem) /* modem intr */ |
| cyy_chip_modem(cinfo, chip, base_addr); |
| spin_unlock(&cinfo->card_lock); |
| } |
| } |
| } while (had_work); |
| |
| /* clear interrupts */ |
| spin_lock(&cinfo->card_lock); |
| cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0); |
| /* Cy_ClrIntr is 0x1800 */ |
| spin_unlock(&cinfo->card_lock); |
| return IRQ_HANDLED; |
| } /* cyy_interrupt */ |
| |
| /***********************************************************/ |
| /********* End of block of Cyclom-Y specific code **********/ |
| /******** Start of block of Cyclades-Z specific code *******/ |
| /***********************************************************/ |
| |
| static int |
| cyz_fetch_msg(struct cyclades_card *cinfo, |
| __u32 *channel, __u8 *cmd, __u32 *param) |
| { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| unsigned long loc_doorbell; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) |
| return -1; |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *) |
| (cinfo->ctl_addr))->loc_doorbell); |
| if (loc_doorbell) { |
| *cmd = (char)(0xff & loc_doorbell); |
| *channel = readl(&board_ctrl->fwcmd_channel); |
| *param = (__u32) readl(&board_ctrl->fwcmd_param); |
| cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> |
| loc_doorbell, 0xffffffff); |
| return 1; |
| } |
| return 0; |
| } /* cyz_fetch_msg */ |
| |
| static int |
| cyz_issue_cmd(struct cyclades_card *cinfo, |
| __u32 channel, __u8 cmd, __u32 param) |
| { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| __u32 __iomem *pci_doorbell; |
| unsigned int index; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) |
| return -1; |
| |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| index = 0; |
| pci_doorbell = |
| &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell; |
| while ((readl(pci_doorbell) & 0xff) != 0) { |
| if (index++ == 1000) |
| return (int)(readl(pci_doorbell) & 0xff); |
| udelay(50L); |
| } |
| cy_writel(&board_ctrl->hcmd_channel, channel); |
| cy_writel(&board_ctrl->hcmd_param, param); |
| cy_writel(pci_doorbell, (long)cmd); |
| |
| return 0; |
| } /* cyz_issue_cmd */ |
| |
| static void cyz_handle_rx(struct cyclades_port *info, |
| struct BUF_CTRL __iomem *buf_ctrl) |
| { |
| struct cyclades_card *cinfo = info->card; |
| struct tty_struct *tty = info->tty; |
| unsigned int char_count; |
| int len; |
| #ifdef BLOCKMOVE |
| unsigned char *buf; |
| #else |
| char data; |
| #endif |
| __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr; |
| |
| rx_get = new_rx_get = readl(&buf_ctrl->rx_get); |
| rx_put = readl(&buf_ctrl->rx_put); |
| rx_bufsize = readl(&buf_ctrl->rx_bufsize); |
| rx_bufaddr = readl(&buf_ctrl->rx_bufaddr); |
| if (rx_put >= rx_get) |
| char_count = rx_put - rx_get; |
| else |
| char_count = rx_put - rx_get + rx_bufsize; |
| |
| if (char_count) { |
| #ifdef CY_ENABLE_MONITORING |
| info->mon.int_count++; |
| info->mon.char_count += char_count; |
| if (char_count > info->mon.char_max) |
| info->mon.char_max = char_count; |
| info->mon.char_last = char_count; |
| #endif |
| if (tty == NULL) { |
| /* flush received characters */ |
| new_rx_get = (new_rx_get + char_count) & |
| (rx_bufsize - 1); |
| info->rflush_count++; |
| } else { |
| #ifdef BLOCKMOVE |
| /* we'd like to use memcpy(t, f, n) and memset(s, c, count) |
| for performance, but because of buffer boundaries, there |
| may be several steps to the operation */ |
| while (1) { |
| len = tty_prepare_flip_string(tty, &buf, |
| char_count); |
| if (!len) |
| break; |
| |
| len = min_t(unsigned int, min(len, char_count), |
| rx_bufsize - new_rx_get); |
| |
| memcpy_fromio(buf, cinfo->base_addr + |
| rx_bufaddr + new_rx_get, len); |
| |
| new_rx_get = (new_rx_get + len) & |
| (rx_bufsize - 1); |
| char_count -= len; |
| info->icount.rx += len; |
| info->idle_stats.recv_bytes += len; |
| } |
| #else |
| len = tty_buffer_request_room(tty, char_count); |
| while (len--) { |
| data = readb(cinfo->base_addr + rx_bufaddr + |
| new_rx_get); |
| new_rx_get = (new_rx_get + 1) & |
| (rx_bufsize - 1); |
| tty_insert_flip_char(tty, data, TTY_NORMAL); |
| info->idle_stats.recv_bytes++; |
| info->icount.rx++; |
| } |
| #endif |
| #ifdef CONFIG_CYZ_INTR |
| /* Recalculate the number of chars in the RX buffer and issue |
| a cmd in case it's higher than the RX high water mark */ |
| rx_put = readl(&buf_ctrl->rx_put); |
| if (rx_put >= rx_get) |
| char_count = rx_put - rx_get; |
| else |
| char_count = rx_put - rx_get + rx_bufsize; |
| if (char_count >= readl(&buf_ctrl->rx_threshold) && |
| !timer_pending(&cyz_rx_full_timer[ |
| info->line])) |
| mod_timer(&cyz_rx_full_timer[info->line], |
| jiffies + 1); |
| #endif |
| info->idle_stats.recv_idle = jiffies; |
| tty_schedule_flip(tty); |
| } |
| /* Update rx_get */ |
| cy_writel(&buf_ctrl->rx_get, new_rx_get); |
| } |
| } |
| |
| static void cyz_handle_tx(struct cyclades_port *info, |
| struct BUF_CTRL __iomem *buf_ctrl) |
| { |
| struct cyclades_card *cinfo = info->card; |
| struct tty_struct *tty = info->tty; |
| u8 data; |
| unsigned int char_count; |
| #ifdef BLOCKMOVE |
| int small_count; |
| #endif |
| __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr; |
| |
| if (info->xmit_cnt <= 0) /* Nothing to transmit */ |
| return; |
| |
| tx_get = readl(&buf_ctrl->tx_get); |
| tx_put = readl(&buf_ctrl->tx_put); |
| tx_bufsize = readl(&buf_ctrl->tx_bufsize); |
| tx_bufaddr = readl(&buf_ctrl->tx_bufaddr); |
| if (tx_put >= tx_get) |
| char_count = tx_get - tx_put - 1 + tx_bufsize; |
| else |
| char_count = tx_get - tx_put - 1; |
| |
| if (char_count) { |
| |
| if (tty == NULL) |
| goto ztxdone; |
| |
| if (info->x_char) { /* send special char */ |
| data = info->x_char; |
| |
| cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
| tx_put = (tx_put + 1) & (tx_bufsize - 1); |
| info->x_char = 0; |
| char_count--; |
| info->icount.tx++; |
| } |
| #ifdef BLOCKMOVE |
| while (0 < (small_count = min_t(unsigned int, |
| tx_bufsize - tx_put, min_t(unsigned int, |
| (SERIAL_XMIT_SIZE - info->xmit_tail), |
| min_t(unsigned int, info->xmit_cnt, |
| char_count))))) { |
| |
| memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + |
| tx_put), |
| &info->xmit_buf[info->xmit_tail], |
| small_count); |
| |
| tx_put = (tx_put + small_count) & (tx_bufsize - 1); |
| char_count -= small_count; |
| info->icount.tx += small_count; |
| info->xmit_cnt -= small_count; |
| info->xmit_tail = (info->xmit_tail + small_count) & |
| (SERIAL_XMIT_SIZE - 1); |
| } |
| #else |
| while (info->xmit_cnt && char_count) { |
| data = info->xmit_buf[info->xmit_tail]; |
| info->xmit_cnt--; |
| info->xmit_tail = (info->xmit_tail + 1) & |
| (SERIAL_XMIT_SIZE - 1); |
| |
| cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data); |
| tx_put = (tx_put + 1) & (tx_bufsize - 1); |
| char_count--; |
| info->icount.tx++; |
| } |
| #endif |
| tty_wakeup(tty); |
| ztxdone: |
| /* Update tx_put */ |
| cy_writel(&buf_ctrl->tx_put, tx_put); |
| } |
| } |
| |
| static void cyz_handle_cmd(struct cyclades_card *cinfo) |
| { |
| struct tty_struct *tty; |
| struct cyclades_port *info; |
| static struct FIRM_ID __iomem *firm_id; |
| static struct ZFW_CTRL __iomem *zfw_ctrl; |
| static struct BOARD_CTRL __iomem *board_ctrl; |
| static struct CH_CTRL __iomem *ch_ctrl; |
| static struct BUF_CTRL __iomem *buf_ctrl; |
| __u32 channel; |
| __u8 cmd; |
| __u32 param; |
| __u32 hw_ver, fw_ver; |
| int special_count; |
| int delta_count; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| fw_ver = readl(&board_ctrl->fw_version); |
| hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))-> |
| mail_box_0); |
| |
| while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) { |
| special_count = 0; |
| delta_count = 0; |
| info = &cinfo->ports[channel]; |
| tty = info->tty; |
| if (tty == NULL) |
| continue; |
| |
| ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]); |
| buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]); |
| |
| switch (cmd) { |
| case C_CM_PR_ERROR: |
| tty_insert_flip_char(tty, 0, TTY_PARITY); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_FR_ERROR: |
| tty_insert_flip_char(tty, 0, TTY_FRAME); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_RXBRK: |
| tty_insert_flip_char(tty, 0, TTY_BREAK); |
| info->icount.rx++; |
| special_count++; |
| break; |
| case C_CM_MDCD: |
| info->icount.dcd++; |
| delta_count++; |
| if (info->flags & ASYNC_CHECK_CD) { |
| if ((fw_ver > 241 ? ((u_long) param) : |
| readl(&ch_ctrl->rs_status)) & |
| C_RS_DCD) { |
| wake_up_interruptible(&info->open_wait); |
| } else { |
| tty_hangup(info->tty); |
| wake_up_interruptible(&info->open_wait); |
| info->flags &= ~ASYNC_NORMAL_ACTIVE; |
| } |
| } |
| break; |
| case C_CM_MCTS: |
| info->icount.cts++; |
| delta_count++; |
| break; |
| case C_CM_MRI: |
| info->icount.rng++; |
| delta_count++; |
| break; |
| case C_CM_MDSR: |
| info->icount.dsr++; |
| delta_count++; |
| break; |
| #ifdef Z_WAKE |
| case C_CM_IOCTLW: |
| complete(&info->shutdown_wait); |
| break; |
| #endif |
| #ifdef CONFIG_CYZ_INTR |
| case C_CM_RXHIWM: |
| case C_CM_RXNNDT: |
| case C_CM_INTBACK2: |
| /* Reception Interrupt */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, " |
| "port %ld\n", info->card, channel); |
| #endif |
| cyz_handle_rx(info, buf_ctrl); |
| break; |
| case C_CM_TXBEMPTY: |
| case C_CM_TXLOWWM: |
| case C_CM_INTBACK: |
| /* Transmission Interrupt */ |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, " |
| "port %ld\n", info->card, channel); |
| #endif |
| cyz_handle_tx(info, buf_ctrl); |
| break; |
| #endif /* CONFIG_CYZ_INTR */ |
| case C_CM_FATAL: |
| /* should do something with this !!! */ |
| break; |
| default: |
| break; |
| } |
| if (delta_count) |
| wake_up_interruptible(&info->delta_msr_wait); |
| if (special_count) |
| tty_schedule_flip(tty); |
| } |
| } |
| |
| #ifdef CONFIG_CYZ_INTR |
| static irqreturn_t cyz_interrupt(int irq, void *dev_id) |
| { |
| struct cyclades_card *cinfo = dev_id; |
| |
| if (unlikely(cinfo == NULL)) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n", |
| irq); |
| #endif |
| return IRQ_NONE; /* spurious interrupt */ |
| } |
| |
| if (unlikely(!ISZLOADED(*cinfo))) { |
| #ifdef CY_DEBUG_INTERRUPTS |
| printk(KERN_DEBUG "cyz_interrupt: board not yet loaded " |
| "(IRQ%d).\n", irq); |
| #endif |
| return IRQ_NONE; |
| } |
| |
| /* Handle the interrupts */ |
| cyz_handle_cmd(cinfo); |
| |
| return IRQ_HANDLED; |
| } /* cyz_interrupt */ |
| |
| static void cyz_rx_restart(unsigned long arg) |
| { |
| struct cyclades_port *info = (struct cyclades_port *)arg; |
| struct cyclades_card *card = info->card; |
| int retval; |
| __u32 channel = info->line - card->first_line; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n", |
| info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #else /* CONFIG_CYZ_INTR */ |
| |
| static void cyz_poll(unsigned long arg) |
| { |
| struct cyclades_card *cinfo; |
| struct cyclades_port *info; |
| struct tty_struct *tty; |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct BUF_CTRL __iomem *buf_ctrl; |
| unsigned long expires = jiffies + HZ; |
| unsigned int port, card; |
| |
| for (card = 0; card < NR_CARDS; card++) { |
| cinfo = &cy_card[card]; |
| |
| if (!IS_CYC_Z(*cinfo)) |
| continue; |
| if (!ISZLOADED(*cinfo)) |
| continue; |
| |
| firm_id = cinfo->base_addr + ID_ADDRESS; |
| zfw_ctrl = cinfo->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &(zfw_ctrl->board_ctrl); |
| |
| /* Skip first polling cycle to avoid racing conditions with the FW */ |
| if (!cinfo->intr_enabled) { |
| cinfo->nports = (int)readl(&board_ctrl->n_channel); |
| cinfo->intr_enabled = 1; |
| continue; |
| } |
| |
| cyz_handle_cmd(cinfo); |
| |
| for (port = 0; port < cinfo->nports; port++) { |
| info = &cinfo->ports[port]; |
| tty = info->tty; |
| buf_ctrl = &(zfw_ctrl->buf_ctrl[port]); |
| |
| if (!info->throttle) |
| cyz_handle_rx(info, buf_ctrl); |
| cyz_handle_tx(info, buf_ctrl); |
| } |
| /* poll every 'cyz_polling_cycle' period */ |
| expires = jiffies + cyz_polling_cycle; |
| } |
| mod_timer(&cyz_timerlist, expires); |
| } /* cyz_poll */ |
| |
| #endif /* CONFIG_CYZ_INTR */ |
| |
| /********** End of block of Cyclades-Z specific code *********/ |
| /***********************************************************/ |
| |
| /* This is called whenever a port becomes active; |
| interrupts are enabled and DTR & RTS are turned on. |
| */ |
| static int startup(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| int retval = 0; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long page; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| |
| page = get_zeroed_page(GFP_KERNEL); |
| if (!page) |
| return -ENOMEM; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (info->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; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| set_line_char(info); |
| |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, " |
| "base_addr %p\n", |
| card, chip, channel, base_addr); |
| #endif |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| |
| cy_writeb(base_addr + (CyRTPR << index), |
| (info->default_timeout ? info->default_timeout : 0x02)); |
| /* 10ms rx timeout */ |
| |
| cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR, |
| index); |
| |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| cy_writeb(base_addr + (CyMSVR1 << index), CyRTS); |
| cy_writeb(base_addr + (CyMSVR2 << index), CyDTR); |
| |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:startup raising DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyRxData); |
| info->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; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| |
| base_addr = card->base_addr; |
| |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*card)) |
| return -ENODEV; |
| |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup Z card %d, channel %d, " |
| "base_addr %p\n", card, channel, base_addr); |
| #endif |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE); |
| #ifdef Z_WAKE |
| #ifdef CONFIG_CYZ_INTR |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
| C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD); |
| #else |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_IOCTLW | C_IN_MDCD); |
| #endif /* CONFIG_CYZ_INTR */ |
| #else |
| #ifdef CONFIG_CYZ_INTR |
| cy_writel(&ch_ctrl[channel].intr_enable, |
| C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM | |
| C_IN_RXNNDT | C_IN_MDCD); |
| #else |
| cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD); |
| #endif /* CONFIG_CYZ_INTR */ |
| #endif /* Z_WAKE */ |
| |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| |
| /* Flush RX buffers before raising DTR and RTS */ |
| retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| |
| /* set timeout !!! */ |
| /* set RTS and DTR !!! */ |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | C_RS_RTS | |
| C_RS_DTR); |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:startup raising Z DTR\n"); |
| #endif |
| |
| /* enable send, recv, modem !!! */ |
| |
| info->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; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc startup done\n"); |
| #endif |
| return 0; |
| |
| errout: |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return retval; |
| } /* startup */ |
| |
| static void start_xmit(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), channel); |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) | CyTxRdy); |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| #ifdef CONFIG_CYZ_INTR |
| int retval; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was " |
| "%x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| #else /* CONFIG_CYZ_INTR */ |
| /* Don't have to do anything at this time */ |
| #endif /* CONFIG_CYZ_INTR */ |
| } |
| } /* start_xmit */ |
| |
| /* |
| * This routine shuts down a serial port; interrupts are disabled, |
| * and DTR is dropped if the hangup on close termio flag is on. |
| */ |
| static void shutdown(struct cyclades_port *info) |
| { |
| struct cyclades_card *card; |
| unsigned long flags; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| |
| if (!(info->flags & ASYNC_INITIALIZED)) |
| return; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, " |
| "channel %d, base_addr %p\n", |
| card, chip, channel, base_addr); |
| #endif |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| /* Clear delta_msr_wait queue to avoid mem leaks. */ |
| wake_up_interruptible(&info->delta_msr_wait); |
| |
| if (info->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(KERN_DEBUG "cyc shutdown dropping DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } |
| cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index); |
| /* it may be appropriate to clear _XMIT at |
| some later date (after testing)!!! */ |
| |
| if (info->tty) |
| set_bit(TTY_IO_ERROR, &info->tty->flags); |
| info->flags &= ~ASYNC_INITIALIZED; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| int retval; |
| |
| base_addr = card->base_addr; |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, " |
| "base_addr %p\n", card, channel, base_addr); |
| #endif |
| |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*card)) |
| return; |
| |
| zfw_ctrl = card->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (info->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, |
| (__u32)(readl(&ch_ctrl[channel].rs_control) & |
| ~(C_RS_RTS | C_RS_DTR))); |
| retval = cyz_issue_cmd(info->card, channel, |
| C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR"cyc:shutdown retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n"); |
| #endif |
| } |
| |
| if (info->tty) |
| set_bit(TTY_IO_ERROR, &info->tty->flags); |
| info->flags &= ~ASYNC_INITIALIZED; |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc shutdown done\n"); |
| #endif |
| } /* shutdown */ |
| |
| /* |
| * ------------------------------------------------------------ |
| * cy_open() and friends |
| * ------------------------------------------------------------ |
| */ |
| |
| static int |
| block_til_ready(struct tty_struct *tty, struct file *filp, |
| struct cyclades_port *info) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| struct cyclades_card *cinfo; |
| unsigned long flags; |
| int chip, channel, index; |
| int retval; |
| void __iomem *base_addr; |
| |
| cinfo = info->card; |
| channel = info->line - cinfo->first_line; |
| |
| /* |
| * If the device is in the middle of being closed, then block |
| * until it's done, and then try again. |
| */ |
| if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { |
| wait_event_interruptible(info->close_wait, |
| !(info->flags & ASYNC_CLOSING)); |
| 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(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, " |
| "count = %d\n", info->line, info->count); |
| #endif |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| if (!tty_hung_up_p(filp)) |
| info->count--; |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to " |
| "%d\n", current->pid, info->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) { |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| if ((tty->termios->c_cflag & CBAUD)) { |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| cy_writeb(base_addr + (CyMSVR1 << index), |
| CyRTS); |
| cy_writeb(base_addr + (CyMSVR2 << index), |
| CyDTR); |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:block_til_ready raising " |
| "DTR\n"); |
| printk(KERN_DEBUG " status: 0x%x, 0x%x\n", |
| readb(base_addr + (CyMSVR1 << index)), |
| readb(base_addr + (CyMSVR2 << index))); |
| #endif |
| } |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (tty_hung_up_p(filp) || |
| !(info->flags & ASYNC_INITIALIZED)) { |
| retval = ((info->flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS); |
| break; |
| } |
| |
| spin_lock_irqsave(&cinfo->card_lock, flags); |
| cy_writeb(base_addr + (CyCAR << index), |
| (u_char) channel); |
| if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || |
| (readb(base_addr + |
| (CyMSVR1 << index)) & CyDCD))) { |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| break; |
| } |
| spin_unlock_irqrestore(&cinfo->card_lock, flags); |
| |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc block_til_ready blocking: " |
| "ttyC%d, count = %d\n", |
| info->line, info->count); |
| #endif |
| schedule(); |
| } |
| } else { |
| struct FIRM_ID __iomem *firm_id; |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| struct CH_CTRL __iomem *ch_ctrl; |
| |
| base_addr = cinfo->base_addr; |
| firm_id = base_addr + ID_ADDRESS; |
| if (!ISZLOADED(*cinfo)) { |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(&info->open_wait, &wait); |
| return -EINVAL; |
| } |
| |
| zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr) |
| & 0xfffff); |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| ch_ctrl = zfw_ctrl->ch_ctrl; |
| |
| while (1) { |
| if ((tty->termios->c_cflag & CBAUD)) { |
| cy_writel(&ch_ctrl[channel].rs_control, |
| readl(&ch_ctrl[channel].rs_control) | |
| C_RS_RTS | C_RS_DTR); |
| retval = cyz_issue_cmd(cinfo, |
| channel, C_CM_IOCTLM, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:block_til_ready " |
| "retval on ttyC%d was %x\n", |
| info->line, retval); |
| } |
| #ifdef CY_DEBUG_DTR |
| printk(KERN_DEBUG "cyc:block_til_ready raising " |
| "Z DTR\n"); |
| #endif |
| } |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| if (tty_hung_up_p(filp) || |
| !(info->flags & ASYNC_INITIALIZED)) { |
| retval = ((info->flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS); |
| break; |
| } |
| if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) || |
| (readl(&ch_ctrl[channel].rs_status) & |
| C_RS_DCD))) { |
| break; |
| } |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc block_til_ready blocking: " |
| "ttyC%d, count = %d\n", |
| info->line, info->count); |
| #endif |
| schedule(); |
| } |
| } |
| __set_current_state(TASK_RUNNING); |
| remove_wait_queue(&info->open_wait, &wait); |
| if (!tty_hung_up_p(filp)) { |
| info->count++; |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing " |
| "count to %d\n", current->pid, info->count); |
| #endif |
| } |
| info->blocked_open--; |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "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; |
| unsigned int i, line; |
| int retval; |
| |
| line = tty->index; |
| if (tty->index < 0 || NR_PORTS <= line) |
| return -ENODEV; |
| |
| for (i = 0; i < NR_CARDS; i++) |
| if (line < cy_card[i].first_line + cy_card[i].nports && |
| line >= cy_card[i].first_line) |
| break; |
| if (i >= NR_CARDS) |
| return -ENODEV; |
| info = &cy_card[i].ports[line - cy_card[i].first_line]; |
| if (info->line < 0) |
| return -ENODEV; |
| |
| /* If the card's firmware hasn't been loaded, |
| treat it as absent from the system. This |
| will make the user pay attention. |
| */ |
| if (IS_CYC_Z(*info->card)) { |
| struct cyclades_card *cinfo = info->card; |
| struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS; |
| |
| if (!ISZLOADED(*cinfo)) { |
| if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *) |
| (cinfo->ctl_addr))->mail_box_0)) && |
| Z_FPGA_CHECK(*cinfo)) && |
| (ZFIRM_HLT == readl( |
| &firm_id->signature))) { |
| printk(KERN_ERR "cyc:Cyclades-Z Error: you " |
| "need an external power supply for " |
| "this number of ports.\nFirmware " |
| "halted.\n"); |
| } else { |
| printk(KERN_ERR "cyc:Cyclades-Z firmware not " |
| "yet loaded\n"); |
| } |
| return -ENODEV; |
| } |
| #ifdef CONFIG_CYZ_INTR |
| else { |
| /* In case this Z board is operating in interrupt mode, its |
| interrupts should be enabled as soon as the first open |
| happens to one of its ports. */ |
| if (!cinfo->intr_enabled) { |
| struct ZFW_CTRL __iomem *zfw_ctrl; |
| struct BOARD_CTRL __iomem *board_ctrl; |
| |
| zfw_ctrl = cinfo->base_addr + |
| (readl(&firm_id->zfwctrl_addr) & |
| 0xfffff); |
| |
| board_ctrl = &zfw_ctrl->board_ctrl; |
| |
| /* Enable interrupts on the PLX chip */ |
| cy_writew(cinfo->ctl_addr + 0x68, |
| readw(cinfo->ctl_addr + 0x68) | 0x0900); |
| /* Enable interrupts on the FW */ |
| retval = cyz_issue_cmd(cinfo, 0, |
| C_CM_IRQ_ENBL, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc:IRQ enable retval " |
| "was %x\n", retval); |
| } |
| cinfo->nports = |
| (int)readl(&board_ctrl->n_channel); |
| cinfo->intr_enabled = 1; |
| } |
| } |
| #endif /* CONFIG_CYZ_INTR */ |
| /* Make sure this Z port really exists in hardware */ |
| if (info->line > (cinfo->first_line + cinfo->nports - 1)) |
| return -ENODEV; |
| } |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line); |
| #endif |
| tty->driver_data = info; |
| info->tty = tty; |
| if (serial_paranoia_check(info, tty->name, "cy_open")) |
| return -ENODEV; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line, |
| info->count); |
| #endif |
| info->count++; |
| #ifdef CY_DEBUG_COUNT |
| printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n", |
| current->pid, info->count); |
| #endif |
| |
| /* |
| * If the port is the middle of closing, bail out now |
| */ |
| if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { |
| wait_event_interruptible(info->close_wait, |
| !(info->flags & ASYNC_CLOSING)); |
| 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(KERN_DEBUG "cyc:cy_open returning after block_til_ready " |
| "with %d\n", retval); |
| #endif |
| return retval; |
| } |
| |
| info->throttle = 0; |
| |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_open done\n"); |
| #endif |
| return 0; |
| } /* cy_open */ |
| |
| /* |
| * cy_wait_until_sent() --- wait until the transmitter is empty |
| */ |
| static void cy_wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| struct cyclades_card *card; |
| struct cyclades_port *info = tty->driver_data; |
| void __iomem *base_addr; |
| int chip, channel, index; |
| unsigned long orig_jiffies; |
| int char_time; |
| |
| if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent")) |
| return; |
| |
| if (info->xmit_fifo_size == 0) |
| return; /* Just in case.... */ |
| |
| orig_jiffies = jiffies; |
| lock_kernel(); |
| /* |
| * Set the check interval to be 1/5 of the estimated time to |
| * send a single character, and make it at least 1. The check |
| * interval should also be less than the timeout. |
| * |
| * Note: we have to use pretty tight timings here to satisfy |
| * the NIST-PCTS. |
| */ |
| char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; |
| char_time = char_time / 5; |
| if (char_time <= 0) |
| char_time = 1; |
| if (timeout < 0) |
| timeout = 0; |
| if (timeout) |
| char_time = min(char_time, timeout); |
| /* |
| * If the transmitter hasn't cleared in twice the approximate |
| * amount of time to send the entire FIFO, it probably won't |
| * ever clear. This assumes the UART isn't doing flow |
| * control, which is currently the case. Hence, if it ever |
| * takes longer than info->timeout, this is probably due to a |
| * UART bug of some kind. So, we clamp the timeout parameter at |
| * 2*info->timeout. |
| */ |
| if (!timeout || timeout > 2 * info->timeout) |
| timeout = 2 * info->timeout; |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...", |
| timeout, char_time, jiffies); |
| #endif |
| card = info->card; |
| channel = (info->line) - (card->first_line); |
| if (!IS_CYC_Z(*card)) { |
| chip = channel >> 2; |
| channel &= 0x03; |
| index = card->bus_index; |
| base_addr = card->base_addr + (cy_chip_offset[chip] << index); |
| while (readb(base_addr + (CySRER << index)) & CyTxRdy) { |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies); |
| #endif |
| if (msleep_interruptible(jiffies_to_msecs(char_time))) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + |
| timeout)) |
| break; |
| } |
| } |
| /* Run one more char cycle */ |
| msleep_interruptible(jiffies_to_msecs(char_time * 5)); |
| unlock_kernel(); |
| #ifdef CY_DEBUG_WAIT_UNTIL_SENT |
| printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies); |
| #endif |
| } |
| |
| static void cy_flush_buffer(struct tty_struct *tty) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| int channel, retval; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_flush_buffer")) |
| return; |
| |
| card = info->card; |
| channel = info->line - card->first_line; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| |
| if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board |
| buffers as well */ |
| spin_lock_irqsave(&card->card_lock, flags); |
| retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L); |
| if (retval != 0) { |
| printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d " |
| "was %x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } |
| tty_wakeup(tty); |
| } /* cy_flush_buffer */ |
| |
| |
| /* |
| * This routine is called when a particular tty device is closed. |
| */ |
| static void cy_close(struct tty_struct *tty, struct file *filp) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| struct cyclades_card *card; |
| unsigned long flags; |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line); |
| #endif |
| |
| if (!info || serial_paranoia_check(info, tty->name, "cy_close")) |
| return; |
| |
| card = info->card; |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| /* If the TTY is being hung up, nothing to do */ |
| if (tty_hung_up_p(filp)) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| return; |
| } |
| #ifdef CY_DEBUG_OPEN |
| printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line, |
| info->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(KERN_ERR "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(KERN_DEBUG "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(KERN_DEBUG "cyc:cyc_close setting count to 0\n"); |
| #endif |
| info->count = 0; |
| } |
| if (info->count) { |
| spin_unlock_irqrestore(&card->card_lock, 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; |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (info->closing_wait != CY_CLOSING_WAIT_NONE) |
| tty_wait_until_sent(tty, info->closing_wait); |
| |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| if (!IS_CYC_Z(*card)) { |
| int channel = info->line - card->first_line; |
| int index = card->bus_index; |
| void __iomem *base_addr = card->base_addr + |
| (cy_chip_offset[channel >> 2] << index); |
| /* Stop accepting input */ |
| channel &= 0x03; |
| cy_writeb(base_addr + (CyCAR << index), (u_char) channel); |
| cy_writeb(base_addr + (CySRER << index), |
| readb(base_addr + (CySRER << index)) & ~CyRxData); |
| if (info->flags & ASYNC_INITIALIZED) { |
| /* Waiting for on-board buffers to be empty before |
| closing the port */ |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| cy_wait_until_sent(tty, info->timeout); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| } else { |
| #ifdef Z_WAKE |
| /* Waiting for on-board buffers to be empty before closing |
| the port */ |
| void __iomem *base_addr = card->base_addr; |
| struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS; |
| struct ZFW_CTRL __iomem *zfw_ctrl = |
| base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff); |
| struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl; |
| int channel = info->line - card->first_line; |
| int retval; |
| |
| if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) { |
| retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L); |
| if (retval != 0) { |
| printk(KERN_DEBUG "cyc:cy_close retval on " |
| "ttyC%d was %x\n", info->line, retval); |
| } |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| wait_for_completion_interruptible(&info->shutdown_wait); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| #endif |
| } |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| shutdown(info); |
| cy_flush_buffer(tty); |
| tty_ldisc_flush(tty); |
| spin_lock_irqsave(&card->card_lock, flags); |
| |
| tty->closing = 0; |
| info->tty = NULL; |
| if (info->blocked_open) { |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| if (info->close_delay) { |
| msleep_interruptible(jiffies_to_msecs |
| (info->close_delay)); |
| } |
| wake_up_interruptible(&info->open_wait); |
| spin_lock_irqsave(&card->card_lock, flags); |
| } |
| info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); |
| wake_up_interruptible(&info->close_wait); |
| |
| #ifdef CY_DEBUG_OTHER |
| printk(KERN_DEBUG "cyc:cy_close done\n"); |
| #endif |
| |
| spin_unlock_irqrestore(&card->card_lock, flags); |
| } /* cy_close */ |
| |
| /* This routine gets called when tty_write has put something into |
| * the write_queue. The characters may come from user space or |
| * kernel space. |
| * |
| * This routine will return the number of characters actually |
| * accepted for writing. |
| * |
| * If the port is not already transmitting stuff, start it off by |
| * enabling interrupts. The interrupt service routine will then |
| * ensure that the characters are sent. |
| * If the port is already active, there is no need to kick it. |
| * |
| */ |
| static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| { |
| struct cyclades_port *info = tty->driver_data; |
| unsigned long flags; |
| int c, ret = 0; |
| |
| #ifdef CY_DEBUG_IO |
| printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line); |
| #endif |
| |
| if (serial_paranoia_check(info, tty->name, "cy_write")) |
| return 0; |
| |
| if (!info->xmit_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->card->card_lock, flags); |
| while (1) { |
| c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1)); |
| c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head)); |
| |
| if (c <= 0) |
| break; |
| |
| memcpy(info->xmit_buf + info->xmit_head, buf, c); |
| info->xmit_head = (info->xmit_head + c) & |
| (SERIAL_XMIT_SIZE - 1); |
| info->xmit_cnt += c; |
| buf += c; |
| count -= c; |
| ret += c; |
| } |
| spin_unlock_irqrestore(&info->card->card_lock, flags); |
| |
| info->idle_stats.xmit_bytes += ret; |
| info->idle_stats.xmit_idle = jiffies; |
| |
| if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) |
| start_xmit(info); |
| |
| return ret; |
| } /* cy_write */ |
| |
| /* |
| * This routine is called by the kernel to write a single |
| * character to the tty device. If the kernel uses this routine, |
| * it must call the flush_chars() routine (if defined) when it is |
| * done stuffing characters into the driver. If there is no room |
| * in the queue, the character is ignored. |
| */ |
| static int cy_put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| struct cyclades_port * |
