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authorRalf Baechle <ralf@linux-mips.org>1999-10-09 00:00:47 +0000
committerRalf Baechle <ralf@linux-mips.org>1999-10-09 00:00:47 +0000
commitd6434e1042f3b0a6dfe1b1f615af369486f9b1fa (patch)
treee2be02f33984c48ec019c654051d27964e42c441 /drivers/char/sx.c
parent609d1e803baf519487233b765eb487f9ec227a18 (diff)
Merge with 2.3.19.
Diffstat (limited to 'drivers/char/sx.c')
-rw-r--r--drivers/char/sx.c2684
1 files changed, 2684 insertions, 0 deletions
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
new file mode 100644
index 000000000..7e5ff9465
--- /dev/null
+++ b/drivers/char/sx.c
@@ -0,0 +1,2684 @@
+
+/* sx.c -- driver for the Specialix SX series cards.
+ *
+ * This driver will also support the older SI, and XIO cards.
+ *
+ *
+ * (C) 1998 R.E.Wolff@BitWizard.nl
+ *
+ * Simon Allen (simonallen@cix.compulink.co.uk) wrote a previous
+ * version of this driver. Some fragments may have been copied. (none
+ * yet :-)
+ *
+ * Specialix pays for the development and support of this driver.
+ * Please DO contact support@specialix.co.uk if you require
+ * support. But please read the documentation (sx.txt) first.
+ *
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
+ * USA.
+ *
+ * Revision history:
+ * $Log: sx.c,v $
+ * Revision 1.26 1999/08/05 15:22:14 wolff
+ * - Port to 2.3.x
+ * - Reformatted to Linus' liking.
+ *
+ * Revision 1.25 1999/07/30 14:24:08 wolff
+ * Had accidentally left "gs_debug" set to "-1" instead of "off" (=0).
+ *
+ * Revision 1.24 1999/07/28 09:41:52 wolff
+ * - I noticed the remark about use-count straying in sx.txt. I checked
+ * sx_open, and found a few places where that could happen. I hope it's
+ * fixed now.
+ *
+ * Revision 1.23 1999/07/28 08:56:06 wolff
+ * - Fixed crash when sx_firmware run twice.
+ * - Added sx_slowpoll as a module parameter (I guess nobody really wanted
+ * to change it from the default... )
+ * - Fixed a stupid editing problem I introduced in 1.22.
+ * - Fixed dropping characters on a termios change.
+ *
+ * Revision 1.22 1999/07/26 21:01:43 wolff
+ * Russell Brown noticed that I had overlooked 4 out of six modem control
+ * signals in sx_getsignals. Ooops.
+ *
+ * Revision 1.21 1999/07/23 09:11:33 wolff
+ * I forgot to free dynamically allocated memory when the driver is unloaded.
+ *
+ * Revision 1.20 1999/07/20 06:25:26 wolff
+ * The "closing wait" wasn't honoured. Thanks to James Griffiths for
+ * reporting this.
+ *
+ * Revision 1.19 1999/07/11 08:59:59 wolff
+ * Fixed an oops in close, when an open was pending. Changed the memtest
+ * a bit. Should also test the board in word-mode, however my card fails the
+ * memtest then. I still have to figure out what is wrong...
+ *
+ * Revision 1.18 1999/06/10 09:38:42 wolff
+ * Changed the format of the firmware revision from %04x to %x.%02x .
+ *
+ * Revision 1.17 1999/06/04 09:44:35 wolff
+ * fixed problem: reference to pci stuff when config_pci was off...
+ * Thanks to Jorge Novo for noticing this.
+ *
+ * Revision 1.16 1999/06/02 08:30:15 wolff
+ * added/removed the workaround for the DCD bug in the Firmware.
+ * A bit more debugging code to locate that...
+ *
+ * Revision 1.15 1999/06/01 11:35:30 wolff
+ * when DCD is left low (floating?), on TA's the firmware first tells us
+ * that DCD is high, but after a short while suddenly comes to the
+ * conclusion that it is low. All this would be fine, if it weren't that
+ * Unix requires us to send a "hangup" signal in that case. This usually
+ * all happens BEFORE the program has had a chance to ioctl the device
+ * into clocal mode..
+ *
+ * Revision 1.14 1999/05/25 11:18:59 wolff
+ * Added PCI-fix.
+ * Added checks for return code of sx_sendcommand.
+ * Don't issue "reconfig" if port isn't open yet. (bit us on TA modules...)
+ *
+ * Revision 1.13 1999/04/29 15:18:01 wolff
+ * Fixed an "oops" that showed on SuSE 6.0 systems.
+ * Activate DTR again after stty 0.
+ *
+ * Revision 1.12 1999/04/29 07:49:52 wolff
+ * Improved "stty 0" handling a bit. (used to change baud to 9600 assuming
+ * the connection would be dropped anyway. That is not always the case,
+ * and confuses people).
+ * Told the card to always monitor the modem signals.
+ * Added support for dynamic gs_debug adjustments.
+ * Now tells the rest of the system the number of ports.
+ *
+ * Revision 1.11 1999/04/24 11:11:30 wolff
+ * Fixed two stupid typos in the memory test.
+ *
+ * Revision 1.10 1999/04/24 10:53:39 wolff
+ * Added some of Christian's suggestions.
+ * Fixed an HW_COOK_IN bug (ISIG was not in I_OTHER. We used to trust the
+ * card to send the signal to the process.....)
+ *
+ * Revision 1.9 1999/04/23 07:26:38 wolff
+ * Included Christian Lademann's 2.0 compile-warning fixes and interrupt
+ * assignment redesign.
+ * Cleanup of some other stuff.
+ *
+ * Revision 1.8 1999/04/16 13:05:30 wolff
+ * fixed a DCD change unnoticed bug.
+ *
+ * Revision 1.7 1999/04/14 22:19:51 wolff
+ * Fixed typo that showed up in 2.0.x builds (get_user instead of Get_user!)
+ *
+ * Revision 1.6 1999/04/13 18:40:20 wolff
+ * changed misc-minor to 161, as assigned by HPA.
+ *
+ * Revision 1.5 1999/04/13 15:12:25 wolff
+ * Fixed use-count leak when "hangup" occurred.
+ * Added workaround for a stupid-PCIBIOS bug.
+ *
+ *
+ * Revision 1.4 1999/04/01 22:47:40 wolff
+ * Fixed < 1M linux-2.0 problem.
+ * (vremap isn't compatible with ioremap in that case)
+ *
+ * Revision 1.3 1999/03/31 13:45:45 wolff
+ * Firmware loading is now done through a separate IOCTL.
+ *
+ * Revision 1.2 1999/03/28 12:22:29 wolff
+ * rcs cleanup
+ *
+ * Revision 1.1 1999/03/28 12:10:34 wolff
+ * Readying for release on 2.0.x (sorry David, 1.01 becomes 1.1 for RCS).
+ *
+ * Revision 0.12 1999/03/28 09:20:10 wolff
+ * Fixed problem in 0.11, continueing cleanup.
+ *
+ * Revision 0.11 1999/03/28 08:46:44 wolff
+ * cleanup. Not good.
+ *
+ * Revision 0.10 1999/03/28 08:09:43 wolff
+ * Fixed loosing characters on close.
+ *
+ * Revision 0.9 1999/03/21 22:52:01 wolff
+ * Ported back to 2.2.... (minor things)
+ *
+ * Revision 0.8 1999/03/21 22:40:33 wolff
+ * Port to 2.0
+ *
+ * Revision 0.7 1999/03/21 19:06:34 wolff
+ * Fixed hangup processing.
+ *
+ * Revision 0.6 1999/02/05 08:45:14 wolff
+ * fixed real_raw problems. Inclusion into kernel imminent.
+ *
+ * Revision 0.5 1998/12/21 23:51:06 wolff
+ * Snatched a nasty bug: sx_transmit_chars was getting re-entered, and it
+ * shouldn't have. THATs why I want to have transmit interrupts even when
+ * the buffer is empty.
+ *
+ * Revision 0.4 1998/12/17 09:34:46 wolff
+ * PPP works. ioctl works. Basically works!
+ *
+ * Revision 0.3 1998/12/15 13:05:18 wolff
+ * It works! Wow! Gotta start implementing IOCTL and stuff....
+ *
+ * Revision 0.2 1998/12/01 08:33:53 wolff
+ * moved over to 2.1.130
+ *
+ * Revision 0.1 1998/11/03 21:23:51 wolff
+ * Initial revision. Detects SX card.
+ *
+ * */
+
+
+#define RCS_ID "$Id: sx.c,v 1.26 1999/08/05 15:22:14 wolff Exp $"
+#define RCS_REV "$Revision: 1.26 $"
+
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/kdev_t.h>
+#include <asm/io.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/mm.h>
+#include <linux/serial.h>
+#include <linux/fcntl.h>
+#include <linux/major.h>
+#include <linux/delay.h>
+#include <linux/tqueue.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/malloc.h>
+#include <linux/miscdevice.h>
+
+/* The 3.0.0 version of sxboards/sxwindow.h uses BYTE and WORD.... */
+#define BYTE u8
+#define WORD u16
+
+/* .... but the 3.0.4 version uses _u8 and _u16. */
+#define _u8 u8
+#define _u16 u16
+
+#include "sxboards.h"
+#include "sxwindow.h"
+
+
+/* I don't think that this driver can handle more than 256 ports on
+ one machine. You'll have to increase the number of boards in sx.h
+ if you want more than 4 boards. */
+
+
+/* ************************************************************** */
+/* * This section can be removed when 2.0 becomes outdated.... * */
+/* ************************************************************** */
+
+
+#if LINUX_VERSION_CODE < 0x020100 /* Less than 2.1.0 */
+#define TWO_ZERO
+#else
+#if LINUX_VERSION_CODE < 0x020200 /* less than 2.2.x */
+#warning "Please use a 2.2.x kernel. "
+#else
+#if LINUX_VERSION_CODE < 0x020300 /* less than 2.3.x */
+#define TWO_TWO
+#else
+#define TWO_THREE
+#endif
+#endif
+#endif
+
+#ifdef TWO_ZERO
+
+/* Here is the section that makes the 2.2 compatible driver source
+ work for 2.0 too! We mostly try to adopt the "new thingies" from 2.2,
+ and provide for compatibility stuff here if possible. */
+
+#include <linux/bios32.h>
+
+#define Get_user(a,b) a = get_user(b)
+#define Put_user(a,b) 0,put_user(a,b)
+#define copy_to_user(a,b,c) memcpy_tofs(a,b,c)
+
+static inline int copy_from_user(void *to,const void *from, int c)
+{
+ memcpy_fromfs(to, from, c);
+ return 0;
+}
+
+#define pci_present pcibios_present
+#define pci_read_config_word pcibios_read_config_word
+#define pci_read_config_dword pcibios_read_config_dword
+
+static inline unsigned char get_irq (unsigned char bus, unsigned char fn)
+{
+ unsigned char t;
+ pcibios_read_config_byte (bus, fn, PCI_INTERRUPT_LINE, &t);
+ return t;
+}
+
+static inline void *ioremap(unsigned long base, long length)
+{
+ if (base < 0x100000) return (void *)base;
+ return vremap (base, length);
+}
+
+#define my_iounmap(x, b) (((long)x<0x100000)?0:vfree ((void*)x))
+
+#define capable(x) suser()
+
+#define queue_task queue_task_irq_off
+#define tty_flip_buffer_push(tty) queue_task(&tty->flip.tqueue, &tq_timer)
+#define signal_pending(current) (current->signal & ~current->blocked)
+#define schedule_timeout(to) do {current->timeout = jiffies + (to);schedule ();} while (0)
+#define time_after(t1,t2) (((long)t1-t2) > 0)
+
+
+#define test_and_set_bit(nr, addr) set_bit(nr, addr)
+#define test_and_clear_bit(nr, addr) clear_bit(nr, addr)
+
+/* Not yet implemented on 2.0 */
+#define ASYNC_SPD_SHI -1
+#define ASYNC_SPD_WARP -1
+
+
+/* Ugly hack: the driver_name doesn't exist in 2.0.x . So we define it
+ to the "name" field that does exist. As long as the assignments are
+ done in the right order, there is nothing to worry about. */
+#define driver_name name
+
+/* Should be in a header somewhere. They are in tty.h on 2.2 */
+#define TTY_HW_COOK_OUT 14 /* Flag to tell ntty what we can handle */
+#define TTY_HW_COOK_IN 15 /* in hardware - output and input */
+
+/* The return type of a "close" routine. */
+#define INT void
+#define NO_ERROR /* Nothing */
+
+#else
+
+/* The 2.2.x compatibility section. */
+#include <asm/uaccess.h>
+
+
+#define Get_user(a,b) get_user(a,b)
+#define Put_user(a,b) put_user(a,b)
+#define get_irq(pdev) pdev->irq
+
+#define INT int
+#define NO_ERROR 0
+
+#define my_iounmap(x,b) (iounmap((char *)(b)))
+
+#endif
+
+#ifndef TWO_THREE
+/* These are new in 2.3. The source now uses 2.3 syntax, and here is
+ the compatibility define... */
+#define wait_queue_head_t struct wait_queue *
+#define DECLARE_MUTEX(name) struct semaphore name = MUTEX
+#define DECLARE_WAITQUEUE(wait, current) struct wait_queue wait = { current, NULL }
+
+#endif
+
+
+
+#include "generic_serial.h"
+#include "sx.h"
+
+
+/* ************************************************************** */
+/* * End of compatibility section.. * */
+/* ************************************************************** */
+
+
+
+/* Why the hell am I defining these here? */
+#define SX_TYPE_NORMAL 1
+#define SX_TYPE_CALLOUT 2
+
+#ifndef SX_NORMAL_MAJOR
+/* This allows overriding on the compiler commandline, or in a "major.h"
+ include or something like that */
+#define SX_NORMAL_MAJOR 32
+#define SX_CALLOUT_MAJOR 33
+#endif
+
+#ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
+#define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
+#endif
+
+
+
+/* Configurable options:
+ (Don't be too sure that it'll work if you toggle them) */
+
+/* Am I paranoid or not ? ;-) */
+#undef SX_PARANOIA_CHECK
+
+
+/* 20 -> 2000 per second. The card should rate-limit interrupts at 100
+ Hz, but it is user configurable. I don't recommend going above 1000
+ Hz. The interrupt ratelimit might trigger if the interrupt is
+ shared with a very active other device. */
+#define IRQ_RATE_LIMIT 20
+
+/* Sharing interrupts is possible now. If the other device wants more
+ than 2000 interrupts per second, we'd gracefully decline further
+ interrupts. That's not what we want. On the other hand, if the
+ other device interrupts 2000 times a second, don't use the SX
+ interrupt. Use polling. */
+#undef IRQ_RATE_LIMIT
+
+
+#if 0
+/* Not implemented */
+/*
+ * The following defines are mostly for testing purposes. But if you need
+ * some nice reporting in your syslog, you can define them also.
+ */
+#define SX_REPORT_FIFO
+#define SX_REPORT_OVERRUN
+#endif
+
+
+/* Function prototypes */
+static void sx_disable_tx_interrupts (void * ptr);
+static void sx_enable_tx_interrupts (void * ptr);
+static void sx_disable_rx_interrupts (void * ptr);
+static void sx_enable_rx_interrupts (void * ptr);
+static int sx_get_CD (void * ptr);
+static void sx_shutdown_port (void * ptr);
+static void sx_set_real_termios (void *ptr);
+static void sx_hungup (void *ptr);
+static void sx_close (void *ptr);
+static int sx_chars_in_buffer (void * ptr);
+static int sx_init_board (struct sx_board *board);
+static int sx_init_portstructs (int nboards, int nports);
+static int sx_fw_ioctl (struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg);
+static int sx_fw_open(struct inode *inode, struct file *filp);
+static INT sx_fw_release(struct inode *inode, struct file *filp);
+static int sx_init_drivers(void);
+void my_hd (unsigned char *addr, int len);
+
+
+
+static struct tty_driver sx_driver, sx_callout_driver;
+
+static struct tty_struct * sx_table[SX_NPORTS] = { NULL, };
+static struct termios ** sx_termios;
+static struct termios ** sx_termios_locked;
+
+struct sx_board boards[SX_NBOARDS];
+struct sx_port *sx_ports;
+int sx_refcount;
+int sx_initialized = 0;
+int sx_nports = 0;
+int sx_debug = 0;
+
+
+/* You can have the driver poll your card.
+ - Set sx_poll to 1 to poll every timer tick (10ms on Intel).
+ This is used when the card cannot use an interrupt for some reason.
+
+ - set sx_slowpoll to 100 to do an extra poll once a second (on Intel). If
+ the driver misses an interrupt (report this if it DOES happen to you!)
+ everything will continue to work....
+ */
+int sx_poll = 1;
+int sx_slowpoll = 0;
+
+/* The card limits the number of interrupts per second.
+ At 115k2 "100" should be sufficient.
+ If you're using higher baudrates, you can increase this...
+ */
+
+int sx_maxints = 100;
+
+/* These are the only open spaces in my computer. Yours may have more
+ or less.... */
+int sx_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
+ 0xc8000, 0xd8000, 0xe8000};
+int si_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
+ 0xc8000, 0xd8000, 0xe8000};
+
+#define NR_SX_ADDRS (sizeof(sx_probe_addrs)/sizeof (int))
+#define NR_SI_ADDRS (sizeof(si_probe_addrs)/sizeof (int))
+
+
+/* Set the mask to all-ones. This alas, only supports 32 interrupts.
+ Some architectures may need more. */
+int sx_irqmask = -1;
+
+#ifndef TWO_ZERO
+#ifdef MODULE
+MODULE_PARM(sx_poll, "i");
+MODULE_PARM(sx_slowpoll, "i");
+MODULE_PARM(sx_maxints, "i");
+MODULE_PARM(sx_debug, "i");
+MODULE_PARM(sx_irqmask, "i");
+#endif
+#endif
+
+static struct real_driver sx_real_driver = {
+ sx_disable_tx_interrupts,
+ sx_enable_tx_interrupts,
+ sx_disable_rx_interrupts,
+ sx_enable_rx_interrupts,
+ sx_get_CD,
+ sx_shutdown_port,
+ sx_set_real_termios,
+ sx_chars_in_buffer,
+ sx_close,
+ sx_hungup,
+ NULL
+};
+
+
+/*
+ This driver can spew a whole lot of debugging output at you. If you
+ need maximum performance, you should disable the DEBUG define. To
+ aid in debugging in the field, I'm leaving the compile-time debug
+ features enabled, and disable them "runtime". That allows me to
+ instruct people with problems to enable debugging without requiring
+ them to recompile...
+*/
+#define DEBUG
+
+
+#ifdef DEBUG
+#define sx_dprintk(f, str...) if (sx_debug & f) printk (str)
+#else
+#define sx_dprintk(f, str...) /* nothing */
+#endif
+
+
+
+#define func_enter() sx_dprintk (SX_DEBUG_FLOW, "sx: enter " __FUNCTION__ "\n")
+#define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit " __FUNCTION__ "\n")
+
+#define func_enter2() sx_dprintk (SX_DEBUG_FLOW, "sx: enter " __FUNCTION__ \
+ "(port %d)\n", port->line)
+
+
+
+
+/*
+ * Firmware loader driver specific routines
+ *
+ */
+
+static struct file_operations sx_fw_fops = {
+ NULL, /* lseek */
+ NULL, /* read */
+ NULL, /* write */
+ NULL, /* readdir */
+ NULL, /* select */
+ sx_fw_ioctl,
+ NULL, /* mmap */
+ sx_fw_open,
+#ifndef TWO_ZERO
+ NULL, /* flush */
+#endif
+ sx_fw_release,
+ NULL, /* fsync */
+ NULL, /* fasync */
+ NULL, /* check_media_change */
+ NULL, /* revalidate */
+};
+
+struct miscdevice sx_fw_device = {
+ SXCTL_MISC_MINOR, "sxctl", &sx_fw_fops
+};
+
+
+
+
+
+#ifdef SX_PARANOIA_CHECK
+
+/* This doesn't work. Who's paranoid around here? Not me! */
+
+static inline int sx_paranoia_check(struct sx_port const * port,
+ kdev_t device, const char *routine)
+{
+
+ static const char *badmagic =
+ KERN_ERR "sx: Warning: bad sx port magic number for device %s in %s\n";
+ static const char *badinfo =
+ KERN_ERR "sx: Warning: null sx port for device %s in %s\n";
+
+ if (!port) {
+ printk(badinfo, kdevname(device), routine);
+ return 1;
+ }
+ if (port->magic != SX_MAGIC) {
+ printk(badmagic, kdevname(device), routine);
+ return 1;
+ }
+
+ return 0;
+}
+#else
+#define sx_paranoia_check(a,b,c) 0
+#endif
+
+/* The timeouts. First try 30 times as fast as possible. Then give
+ the card some time to breathe between accesses. (Otherwise the
+ processor on the card might not be able to access its OWN bus... */
+
+#define TIMEOUT_1 30
+#define TIMEOUT_2 1000000
+
+
+/* This needs redoing for Alpha -- REW -- Done. */
+
+inline void write_sx_byte (struct sx_board *board, int offset, u8 byte)
+{
+ writeb (byte, board->base+offset);
+}
+
+inline u8 read_sx_byte (struct sx_board *board, int offset)
+{
+ return readb (board->base+offset);
+}
+
+
+inline void write_sx_word (struct sx_board *board, int offset, u16 word)
+{
+ writew (word, board->base+offset);
+}
+
+inline u16 read_sx_word (struct sx_board *board, int offset)
+{
+ return readw (board->base + offset);
+}
+
+
+int sx_busy_wait_eq (struct sx_board *board,
+ int offset,
+ int mask,
+ int correctval)
+{
+ int i;
+
+ func_enter ();
+
+ for (i=0; i < TIMEOUT_1 > 0;i++)
+ if ((read_sx_byte (board, offset) & mask) == correctval) {
+ func_exit ();
+ return 1;
+ }
+
+ for (i=0; i < TIMEOUT_2 > 0;i++) {
+ if ((read_sx_byte (board, offset) & mask) == correctval) {
+ func_exit ();
+ return 1;
+ }
+ udelay (1);
+ }
+
+ func_exit ();
+ return 0;
+}
+
+
+int sx_busy_wait_neq (struct sx_board *board,
+ int offset,
+ int mask,
+ int badval)
+{
+ int i;
+
+ func_enter ();
+
+ for (i=0; i < TIMEOUT_1 > 0;i++)
+ if ((read_sx_byte (board, offset) & mask) != badval) {
+ func_exit ();
+ return 1;
+ }
+
+ for (i=0; i < TIMEOUT_2 > 0;i++) {
+ if ((read_sx_byte (board, offset) & mask) != badval) {
+ func_exit ();
+ return 1;
+ }
+ udelay (1);
+ }
+
+ func_exit ();
+ return 0;
+}
+
+
+
+/* 5.6.4 of 6210028 r2.3 */
+int sx_reset (struct sx_board *board)
+{
+ func_enter ();
+
+ if (IS_SX_BOARD (board)) {
+
+ write_sx_byte (board, SX_CONFIG, 0);
+ write_sx_byte (board, SX_RESET, 1); /* Value doesn't matter */
+
+ if (!sx_busy_wait_eq (board, SX_RESET_STATUS, 1, 0)) {
+ printk (KERN_INFO "sx: Card doesn't respond to reset....\n");
+ return 0;
+ }
+ } else {
+ /* Gory details of the SI/ISA board */
+ write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_SET);
+ write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_CLEAR);
+ write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_CLEAR);
+ write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_CLEAR);
+ write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR);
+ write_sx_byte (board, SI2_ISA_IRQSET, SI2_ISA_IRQSET_CLEAR);
+ }
+
+ func_exit ();
+ return 1;
+}
+
+
+/* This doesn't work on machines where "NULL" isn't 0 */
+/* If you have one of those, someone will need to write
+ the equivalent of this, which will amount to about 3 lines. I don't
+ want to complicate this right now. -- REW
+ (See, I do write comments every now and then :-) */
+#define OFFSETOF(strct, elem) ((long)&(((struct strct *)NULL)->elem))
+
+
+#define CHAN_OFFSET(port,elem) (port->ch_base + OFFSETOF (_SXCHANNEL, elem))
+#define MODU_OFFSET(board,addr,elem) (addr + OFFSETOF (_SXMODULE, elem))
+#define BRD_OFFSET(board,elem) (OFFSETOF (_SXCARD, elem))
+
+
+#define sx_write_channel_byte(port, elem, val) \
+ write_sx_byte (port->board, CHAN_OFFSET (port, elem), val)
+
+#define sx_read_channel_byte(port, elem) \
+ read_sx_byte (port->board, CHAN_OFFSET (port, elem))
+
+#define sx_write_channel_word(port, elem, val) \
+ write_sx_word (port->board, CHAN_OFFSET (port, elem), val)
+
+#define sx_read_channel_word(port, elem) \
+ read_sx_word (port->board, CHAN_OFFSET (port, elem))
+
+
+#define sx_write_module_byte(board, addr, elem, val) \
+ write_sx_byte (board, MODU_OFFSET (board, addr, elem), val)
+
+#define sx_read_module_byte(board, addr, elem) \
+ read_sx_byte (board, MODU_OFFSET (board, addr, elem))
+
+#define sx_write_module_word(board, addr, elem, val) \
+ write_sx_word (board, MODU_OFFSET (board, addr, elem), val)
+
+#define sx_read_module_word(board, addr, elem) \
+ read_sx_word (board, MODU_OFFSET (board, addr, elem))
+
+
+#define sx_write_board_byte(board, elem, val) \
+ write_sx_byte (board, BRD_OFFSET (board, elem), val)
+
+#define sx_read_board_byte(board, elem) \
+ read_sx_byte (board, BRD_OFFSET (board, elem))
+
+#define sx_write_board_word(board, elem, val) \
+ write_sx_word (board, BRD_OFFSET (board, elem), val)
+
+#define sx_read_board_word(board, elem) \
+ read_sx_word (board, BRD_OFFSET (board, elem))
+
+
+int sx_start_board (struct sx_board *board)
+{
+ if (IS_SX_BOARD (board)) {
+ write_sx_byte (board, SX_CONFIG, SX_CONF_BUSEN);
+ } else {
+ /* Don't bug me about the clear_set.
+ I haven't the foggiest idea what it's about -- REW*/
+ write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_CLEAR);
+ write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
+ }
+ return 1;
+}
+
+#define SX_IRQ_REG_VAL(board) \
+ ((board->flags & SX_ISA_BOARD)?(board->irq << 4):0)
+
+/* Note. The SX register is write-only. Therefore, we have to enable the
+ bus too. This is a no-op, if you don't mess with this driver... */
+int sx_start_interrupts (struct sx_board *board)
+{
+
+ /* Don't call this with board->irq == 0 */
+
+ if (IS_SX_BOARD(board)) {
+ write_sx_byte (board, SX_CONFIG, SX_IRQ_REG_VAL (board) |
+ SX_CONF_BUSEN |
+ SX_CONF_HOSTIRQ);
+ } else {
+ switch (board->irq) {
+ case 11:write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_SET);break;
+ case 12:write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_SET);break;
+ case 15:write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_SET);break;
+ default:printk (KERN_INFO "sx: SI/XIO card doesn't support interrupt %d.\n",
+ board->irq);
+ return 0;
+ }
+ write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
+ }
+
+ return 1;
+}
+
+
+int sx_send_command (struct sx_port *port,
+ int command,
+ int mask,
+ int newstat)
+{
+ func_enter2 ();
+ write_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat), command);
+ func_exit ();
+ return sx_busy_wait_eq (port->board, CHAN_OFFSET (port, hi_hstat), mask, newstat);
+}
+
+
+char *mod_type_s (int module_type)
+{
+ switch (module_type) {
+ case TA4: return "TA4";
+ case TA8: return "TA8";
+ case TA4_ASIC: return "TA4_ASIC";
+ case TA8_ASIC: return "TA8_ASIC";
+ case MTA_CD1400:return "MTA_CD1400";
+ case SXDC: return "SXDC";
+ default:return "Unknown/invalid";
+ }
+}
+
+
+char *pan_type_s (int pan_type)
+{
+ switch (pan_type) {
+ case MOD_RS232DB25: return "MOD_RS232DB25";
+ case MOD_RS232RJ45: return "MOD_RS232RJ45";
+ case MOD_RS422DB25: return "MOD_RS422DB25";
+ case MOD_PARALLEL: return "MOD_PARALLEL";
+ case MOD_2_RS232DB25: return "MOD_2_RS232DB25";
+ case MOD_2_RS232RJ45: return "MOD_2_RS232RJ45";
+ case MOD_2_RS422DB25: return "MOD_2_RS422DB25";
+ case MOD_RS232DB25MALE: return "MOD_RS232DB25MALE";
+ case MOD_2_PARALLEL: return "MOD_2_PARALLEL";
+ case MOD_BLANK: return "empty";
+ default:return "invalid";
+ }
+}
+
+
+int mod_compat_type (int module_type)
+{
+ return module_type >> 4;
+}
+
+
+static void sx_setsignals (struct sx_port *port, int dtr, int rts)
+{
+ int t;
+ func_enter2 ();
+
+ t = sx_read_channel_byte (port, hi_op);
+ if (dtr >= 0) t = dtr? (t | OP_DTR): (t & ~OP_DTR);
+ if (rts >= 0) t = rts? (t | OP_RTS): (t & ~OP_RTS);
+ sx_write_channel_byte (port, hi_op, t);
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "setsignals: %d/%d\n", dtr, rts);
+ func_exit ();
+}
+
+
+
+static int sx_getsignals (struct sx_port *port)
+{
+ int i_stat,o_stat;
+
+ o_stat = sx_read_channel_byte (port, hi_op);
+ i_stat = sx_read_channel_byte (port, hi_ip);
+
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d (%d/%d) %02x/%02x\n",
+ (o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0,
+ port->c_dcd, sx_get_CD (port),
+ sx_read_channel_byte (port, hi_ip),
+ sx_read_channel_byte (port, hi_state));
+
+ return (((o_stat & OP_DTR)?TIOCM_DTR:0) |
+ ((o_stat & OP_RTS)?TIOCM_RTS:0) |
+ ((i_stat & IP_CTS)?TIOCM_CTS:0) |
+ ((i_stat & IP_DCD)?TIOCM_CAR:0) |
+ ((i_stat & IP_DSR)?TIOCM_DSR:0) |
+ ((i_stat & IP_RI)?TIOCM_RNG:0)
+ );
+}
+
+
+static void sx_set_baud (struct sx_port *port)
+{
+ int t;
+
+ if (port->board->ta_type == MOD_SXDC) {
+ switch (port->gs.baud) {
+ /* Save some typing work... */
+#define e(x) case x:t= BAUD_ ## x ; break
+ e(50);e(75);e(110);e(150);e(200);e(300);e(600);
+ e(1200);e(1800);e(2000);e(2400);e(4800);e(7200);
+ e(9600);e(14400);e(19200);e(28800);e(38400);
+ e(56000);e(57600);e(64000);e(76800);e(115200);
+ e(128000);e(150000);e(230400);e(256000);e(460800);
+ e(921600);
+ case 134 :t = BAUD_134_5; break;
+ case 0 :t = -1;
+ break;
+ default:
+ /* Can I return "invalid"? */
+ t = BAUD_9600;
+ printk (KERN_INFO "sx: unsupported baud rate: %d.\n", port->gs.baud);
+ break;
+ }
+#undef e
+ if (t > 0) {
+ /* The baud rate is not set to 0, so we're enabeling DTR... -- REW */
+ sx_setsignals (port, 1, -1);
+ /* XXX This is not TA & MTA compatible */
+ sx_write_channel_byte (port, hi_csr, 0xff);
+
+ sx_write_channel_byte (port, hi_txbaud, t);
+ sx_write_channel_byte (port, hi_rxbaud, t);
+ } else {
+ sx_setsignals (port, 0, -1);
+ }
+ } else {
+ switch (port->gs.baud) {
+#define e(x) case x:t= CSR_ ## x ; break
+ e(75);e(150);e(300);e(600);e(1200);e(2400);e(4800);
+ e(1800);e(9600);
+ e(19200);e(57600);e(38400);
+ /* TA supports 110, but not 115200, MTA supports 115200, but not 110 */
+ case 110:
+ if (port->board->ta_type == MOD_TA) {
+ t = CSR_110;
+ break;
+ } else {
+ t = CSR_9600;
+ printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
+ break;
+ }
+ case 115200:
+ if (port->board->ta_type == MOD_TA) {
+ t = CSR_9600;
+ printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
+ break;
+ } else {
+ t = CSR_110;
+ break;
+ }
+ case 0 :t = -1;
+ break;
+ default:
+ t = CSR_9600;
+ printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
+ break;
+ }
+#undef e
+ if (t >= 0) {
+ sx_setsignals (port, 1, -1);
+ sx_write_channel_byte (port, hi_csr, t * 0x11);
+ } else {
+ sx_setsignals (port, 0, -1);
+ }
+ }
+}
+
+
+/* Simon Allen's version of this routine was 225 lines long. 85 is a lot
+ better. -- REW */
+
+static void sx_set_real_termios (void *ptr)
+{
+ struct sx_port *port = ptr;
+
+ func_enter2();
+
+ /* What is this doing here? -- REW
+ Ha! figured it out. It is to allow you to get DTR active again
+ if you've dropped it with stty 0. Moved to set_baud, where it
+ belongs (next to the drop dtr if baud == 0) -- REW */
+ /* sx_setsignals (port, 1, -1); */
+
+ sx_set_baud (port);
+
+#define CFLAG port->gs.tty->termios->c_cflag
+ sx_write_channel_byte (port, hi_mr1,
+ (C_PARENB (port->gs.tty)? MR1_WITH:MR1_NONE) |
+ (C_PARODD (port->gs.tty)? MR1_ODD:MR1_EVEN) |
+ (C_CRTSCTS(port->gs.tty)? MR1_RTS_RXFLOW:0) |
+ (((CFLAG & CSIZE)==CS8) ? MR1_8_BITS:0) |
+ (((CFLAG & CSIZE)==CS7) ? MR1_7_BITS:0) |
+ (((CFLAG & CSIZE)==CS6) ? MR1_6_BITS:0) |
+ (((CFLAG & CSIZE)==CS5) ? MR1_5_BITS:0) );
+
+ sx_write_channel_byte (port, hi_mr2,
+ (C_CRTSCTS(port->gs.tty)?MR2_CTS_TXFLOW:0) |
+ (C_CSTOPB (port->gs.tty)?MR2_2_STOP:MR2_1_STOP));
+
+ switch (CFLAG & CSIZE) {
+ case CS8:sx_write_channel_byte (port, hi_mask, 0xff);break;
+ case CS7:sx_write_channel_byte (port, hi_mask, 0x7f);break;
+ case CS6:sx_write_channel_byte (port, hi_mask, 0x3f);break;
+ case CS5:sx_write_channel_byte (port, hi_mask, 0x1f);break;
+ default:
+ printk (KERN_INFO "sx: Invalid wordsize: %d\n", CFLAG & CSIZE);
+ break;
+ }
+
+ sx_write_channel_byte (port, hi_prtcl,
+ (I_IXON (port->gs.tty)?SP_TXEN:0) |
+ (I_IXOFF (port->gs.tty)?SP_RXEN:0) |
+ (I_IXANY (port->gs.tty)?SP_TANY:0) |
+ SP_DCEN);
+
+ sx_write_channel_byte (port, hi_break,
+ I_OTHER(port->gs.tty) ? 0:
+ (I_IGNBRK(port->gs.tty)?BR_IGN:0 |
+ I_BRKINT(port->gs.tty)?BR_INT:0));
+
+ sx_write_channel_byte (port, hi_txon, START_CHAR (port->gs.tty));
+ sx_write_channel_byte (port, hi_rxon, START_CHAR (port->gs.tty));
+ sx_write_channel_byte (port, hi_txoff, STOP_CHAR (port->gs.tty));
+ sx_write_channel_byte (port, hi_rxoff, STOP_CHAR (port->gs.tty));
+
+ if (sx_read_channel_byte (port, hi_hstat) == HS_IDLE_OPEN) {
+ if (sx_send_command (port, HS_CONFIG, -1, HS_IDLE_OPEN) != 1) {
+ printk (KERN_WARNING "sx: Sent reconfigure command, but card didn't react.\n");
+ }
+ } else {
+ sx_dprintk (SX_DEBUG_TERMIOS,
+ "sx: Not sending reconfigure: port isn't open (%02x).\n",
+ sx_read_channel_byte (port, hi_hstat));
+ }
+
+
+ /* Tell line discipline whether we will do input cooking */
+ if(I_OTHER(port->gs.tty)) {
+ clear_bit(TTY_HW_COOK_IN, &port->gs.tty->flags);
+ } else {
+ set_bit(TTY_HW_COOK_IN, &port->gs.tty->flags);
+ }
+ sx_dprintk (SX_DEBUG_TERMIOS, "iflags: %x(%d) ",
+ port->gs.tty->termios->c_iflag,
+ I_OTHER(port->gs.tty));
+
+
+/* Tell line discipline whether we will do output cooking.
+ * If OPOST is set and no other output flags are set then we can do output
+ * processing. Even if only *one* other flag in the O_OTHER group is set
+ * we do cooking in software.
+ */
+ if(O_OPOST(port->gs.tty) && !O_OTHER(port->gs.tty)) {
+ set_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags);
+ } else {
+ clear_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags);
+ }
+ sx_dprintk (SX_DEBUG_TERMIOS, "oflags: %x(%d)\n",
+ port->gs.tty->termios->c_oflag,
+ O_OTHER(port->gs.tty));
+ /* port->c_dcd = sx_get_CD (port); */
+ func_exit ();
+}
+
+
+
+/* ********************************************************************** *
+ * the interrupt related routines *
+ * ********************************************************************** */
+
+/* Note:
+ Other drivers use the macro "MIN" to calculate how much to copy.
+ This has the disadvantage that it will evaluate parts twice. That's
+ expensive when it's IO (and the compiler cannot optimize those away!).
+ Moreover, I'm not sure that you're race-free.
+
+ I assign a value, and then only allow the value to decrease. This
+ is always safe. This makes the code a few lines longer, and you
+ know I'm dead against that, but I think it is required in this
+ case. */
+
+
+void sx_transmit_chars (struct sx_port *port)
+{
+ int c;
+ int tx_ip;
+ int txroom;
+
+ func_enter2 ();
+ sx_dprintk (SX_DEBUG_TRANSMIT, "Port %p: transmit %d chars\n",
+ port, port->gs.xmit_cnt);
+
+ if (test_and_set_bit (SX_PORT_TRANSMIT_LOCK, &port->locks)) {
+ return;
+ }
+
+ while (1) {
+ c = port->gs.xmit_cnt;
+
+ sx_dprintk (SX_DEBUG_TRANSMIT, "Copying %d ", c);
+ tx_ip = sx_read_channel_byte (port, hi_txipos);
+
+ /* Took me 5 minutes to deduce this formula.
+ Luckily it is literally in the manual in section 6.5.4.3.5 */
+ txroom = (sx_read_channel_byte (port, hi_txopos) - tx_ip - 1) & 0xff;
+
+ /* Don't copy more bytes than there is room for in the buffer */
+ if (c > txroom)
+ c = txroom;
+ sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, txroom );
+
+ /* Don't copy past the end of the hardware transmit buffer */
+ if (c > 0x100 - tx_ip)
+ c = 0x100 - tx_ip;
+
+ sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, 0x100-tx_ip );
+
+ /* Don't copy pas the end of the source buffer */
+ if (c > SERIAL_XMIT_SIZE - port->gs.xmit_tail)
+ c = SERIAL_XMIT_SIZE - port->gs.xmit_tail;
+
+ sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) \n",
+ c, SERIAL_XMIT_SIZE- port->gs.xmit_tail);
+
+ /* If for one reason or another, we can't copy more data, we're done! */
+ if (c == 0) break;
+
+
+ memcpy_toio (port->board->base + CHAN_OFFSET(port,hi_txbuf) + tx_ip,
+ port->gs.xmit_buf + port->gs.xmit_tail, c);
+
+ /* Update the pointer in the card */
+ sx_write_channel_byte (port, hi_txipos, (tx_ip+c) & 0xff);
+
+ /* Update the kernel buffer end */
+ port->gs.xmit_tail = (port->gs.xmit_tail + c) & (SERIAL_XMIT_SIZE-1);
+
+ /* This one last. (this is essential)
+ It would allow others to start putting more data into the buffer! */
+ port->gs.xmit_cnt -= c;
+ }
+
+ if (port->gs.xmit_cnt == 0) {
+ sx_disable_tx_interrupts (port);
+ }
+
+ if (port->gs.xmit_cnt <= port->gs.wakeup_chars) {
+ if ((port->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ port->gs.tty->ldisc.write_wakeup)
+ (port->gs.tty->ldisc.write_wakeup)(port->gs.tty);
+ sx_dprintk (SX_DEBUG_TRANSMIT, "Waking up.... ldisc (%d)....\n",
+ port->gs.wakeup_chars);
+ wake_up_interruptible(&port->gs.tty->write_wait);
+ }
+
+ clear_bit (SX_PORT_TRANSMIT_LOCK, &port->locks);
+ func_exit ();
+}
+
+
+/* Note the symmetry between receiving chars and transmitting them!
+ Note: The kernel should have implemented both a receive buffer and
+ a transmit buffer. */
+
+/* Inlined: Called only once. Remove the inline when you add another call */
+inline void sx_receive_chars (struct sx_port *port)
+{
+ int c;
+ int rx_op;
+ struct tty_struct *tty;
+ int copied=0;
+
+ /* func_enter2 (); */
+ tty = port->gs.tty;
+ while (1) {
+ rx_op = sx_read_channel_byte (port, hi_rxopos);
+ c = (sx_read_channel_byte (port, hi_rxipos) - rx_op) & 0xff;
+
+ sx_dprintk (SX_DEBUG_RECEIVE, "rxop=%d, c = %d.\n", rx_op, c);
+
+ /* Don't copy more bytes than there is room for in the buffer */
+ if (tty->flip.count + c > TTY_FLIPBUF_SIZE)
+ c = TTY_FLIPBUF_SIZE - tty->flip.count;
+
+ sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c);
+
+ /* Don't copy past the end of the hardware receive buffer */
+ if (rx_op + c > 0x100) c = 0x100 - rx_op;
+
+ sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c);
+
+ /* If for one reason or another, we can't copy more data, we're done! */
+ if (c == 0) break;
+
+ sx_dprintk (SX_DEBUG_RECEIVE , "Copying over %d chars. First is %d at %lx\n", c,
+ read_sx_byte (port->board, CHAN_OFFSET(port,hi_rxbuf) + rx_op),
+ CHAN_OFFSET(port, hi_rxbuf));
+ memcpy_fromio (tty->flip.char_buf_ptr,
+ port->board->base + CHAN_OFFSET(port,hi_rxbuf) + rx_op, c);
+ memset(tty->flip.flag_buf_ptr, TTY_NORMAL, c);
+
+ /* Update the kernel buffer end */
+ tty->flip.count += c;
+ tty->flip.char_buf_ptr += c;
+ tty->flip.flag_buf_ptr += c;
+
+ /* This one last. ( Not essential.)
+ It allows the card to start putting more data into the buffer!
+ Update the pointer in the card */
+ sx_write_channel_byte (port, hi_rxopos, (rx_op + c) & 0xff);
+
+ copied += c;
+ }
+ if (copied) {
+ struct timeval tv;
+
+ do_gettimeofday (&tv);
+ sx_dprintk (SX_DEBUG_RECEIVE,
+ "pushing flipq port %d (%3d chars): %d.%06d (%d/%d)\n",
+ port->line, copied,
+ (int) (tv.tv_sec % 60), (int)tv.tv_usec, tty->raw, tty->real_raw);
+
+ /* Tell the rest of the system the news. Great news. New characters! */
+ tty_flip_buffer_push (tty);
+ /* tty_schedule_flip (tty); */
+ }
+
+ /* func_exit (); */
+}
+
+/* Inlined: it is called only once. Remove the inline if you add another
+ call */
+inline void sx_check_modem_signals (struct sx_port *port)
+{
+ int hi_state;
+ int c_dcd;
+
+ hi_state = sx_read_channel_byte (port, hi_state);
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n",
+ port->c_dcd, sx_get_CD (port));
+
+ if (hi_state & ST_BREAK) {
+ hi_state &= ~ST_BREAK;
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a break.\n");
+
+ sx_write_channel_byte (port, hi_state, hi_state);
+ if (port->gs.flags & ASYNC_SAK) {
+ do_SAK (port->gs.tty);
+ }
+ }
+ if (hi_state & ST_DCD) {
+ hi_state &= ~ST_DCD;
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n");
+ sx_write_channel_byte (port, hi_state, hi_state);
+ c_dcd = sx_get_CD (port);
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd);
+ if (c_dcd != port->c_dcd) {
+ port->c_dcd = c_dcd;
+ if (sx_get_CD (port)) {
+ /* DCD went UP */
+ if( (~(port->gs.flags & ASYNC_NORMAL_ACTIVE) ||
+ ~(port->gs.flags & ASYNC_CALLOUT_ACTIVE)) &&
+ (sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED)) {
+ /* Are we blocking in open?*/
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD active, unblocking open\n");
+ wake_up_interruptible(&port->gs.open_wait);
+ } else {
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD raised. Ignoring.\n");
+ }
+ } else {
+ /* DCD went down! */
+ if (!((port->gs.flags & ASYNC_CALLOUT_ACTIVE) &&
+ (port->gs.flags & ASYNC_CALLOUT_NOHUP))) {
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. hanging up....\n");
+ tty_hangup (port->gs.tty);
+ } else {
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. ignoring.\n");
+ }
+ }
+ } else {
+ sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Hmmm. card told us DCD changed, but it didn't.\n");
+ }
+ }
+}
+
+
+/* This is what an interrupt routine should look like.
+ * Small, elegant, clear.
+ */
+
+static void sx_interrupt (int irq, void *ptr, struct pt_regs *regs)
+{
+ struct sx_board *board = ptr;
+ struct sx_port *port;
+ int i;
+
+ /* func_enter (); */
+ sx_dprintk (SX_DEBUG_FLOW, "sx: enter sx_interrupt (%d/%d)\n", irq, board->irq);
+
+ /* AAargh! The order in which to do these things is essential and
+ not trivial.
+
+ - Rate limit goes before "recursive". Otherwise a series of
+ recursive calls will hang the machine in the interrupt routine.
+
+ - hardware twiddling goes before "recursive". Otherwise when we
+ poll the card, and a recursive interrupt happens, we wont
+ ack the card, so it might keep on interrupting us. (especially
+ level sensitive interrupt systems like PCI).
+
+ - Rate limit goes before hardware twiddling. Otherwise we won't
+ catch a card that has gone bonkers.
+
+ - The "initialized" test goes after the hardware twiddling. Otherwise
+ the card will stick us in the interrupt routine again.
+
+ - The initialized test goes before recursive.
+ */
+
+
+
+#ifdef IRQ_RATE_LIMIT
+ /* Aaargh! I'm ashamed. This costs more lines-of-code than the
+ actual interrupt routine!. (Well, used to when I wrote that comment) */
+ {
+ static int lastjif;
+ static int nintr=0;
+
+ if (lastjif == jiffies) {
+ if (++nintr > IRQ_RATE_LIMIT) {
+ free_irq (board->irq, board);
+ printk (KERN_ERR "sx: Too many interrupts. Turning off interrupt %d.\n",
+ board->irq);
+ }
+ } else {
+ lastjif = jiffies;
+ nintr = 0;
+ }
+ }
+#endif
+
+
+ if (board->irq == irq) {
+ /* Tell the card we've noticed the interrupt. */
+
+ sx_write_board_word (board, cc_int_pending, 0);
+ if (IS_SX_BOARD (board)) {
+ write_sx_byte (board, SX_RESET_IRQ, 1);
+ } else {
+ write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR);
+ write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
+ }
+ }
+
+ if (!sx_initialized) return;
+ if (!(board->flags & SX_BOARD_INITIALIZED)) return;
+
+ if (test_and_set_bit (SX_BOARD_INTR_LOCK, &board->locks)) {
+ printk (KERN_ERR "Recursive interrupt! (%d)\n", board->irq);
+ return;
+ }
+
+ for (i=0;i<board->nports;i++) {
+ port = &board->ports[i];
+ if (port->gs.flags & GS_ACTIVE) {
+ if (sx_read_channel_byte (port, hi_state)) {
+ sx_dprintk (SX_DEBUG_INTERRUPTS,
+ "Port %d: modem signal change?... \n", i);
+ sx_check_modem_signals (port);
+ }
+ if (port->gs.xmit_cnt) {
+ sx_transmit_chars (port);
+ }
+ if (!(port->gs.flags & SX_RX_THROTTLE)) {
+ sx_receive_chars (port);
+ }
+ }
+ }
+
+ clear_bit (SX_BOARD_INTR_LOCK, &board->locks);
+
+ sx_dprintk (SX_DEBUG_FLOW, "sx: exit sx_interrupt (%d/%d)\n", irq, board->irq);
+ /* func_exit (); */
+}
+
+
+static void sx_pollfunc (unsigned long data)
+{
+ struct sx_board *board = (struct sx_board *) data;
+
+ func_enter ();
+
+ sx_interrupt (0, board, NULL);
+
+ board->timer.expires = jiffies + sx_poll;
+ add_timer (&board->timer);
+ func_exit ();
+}
+
+
+
+/* ********************************************************************** *
+ * Here are the routines that actually *
+ * interface with the generic_serial driver *
+ * ********************************************************************** */
+
+/* Ehhm. I don't know how to fiddle with interrupts on the SX card. --REW */
+/* Hmm. Ok I figured it out. You don't. */
+
+static void sx_disable_tx_interrupts (void * ptr)
+{
+ struct sx_port *port = ptr;
+ func_enter2();
+
+ port->gs.flags &= ~GS_TX_INTEN;
+
+ func_exit();
+}
+
+
+static void sx_enable_tx_interrupts (void * ptr)
+{
+ struct sx_port *port = ptr;
+ int data_in_buffer;
+ func_enter2();
+
+ /* First transmit the characters that we're supposed to */
+ sx_transmit_chars (port);
+
+ /* The sx card will never interrupt us if we don't fill the buffer
+ past 25%. So we keep considering interrupts off if that's the case. */
+ data_in_buffer = (sx_read_channel_byte (port, hi_txipos) -
+ sx_read_channel_byte (port, hi_txopos)) & 0xff;
+
+ /* XXX Must be "HIGH_WATER" for SI card according to doc. */
+ if (data_in_buffer < LOW_WATER)
+ port->gs.flags &= ~GS_TX_INTEN;
+
+ func_exit();
+}
+
+
+static void sx_disable_rx_interrupts (void * ptr)
+{
+ /* struct sx_port *port = ptr; */
+ func_enter();
+
+ func_exit();
+}
+
+static void sx_enable_rx_interrupts (void * ptr)
+{
+ /* struct sx_port *port = ptr; */
+ func_enter();
+
+ func_exit();
+}
+
+
+/* Jeez. Isn't this simple? */
+static int sx_get_CD (void * ptr)
+{
+ struct sx_port *port = ptr;
+ func_enter2();
+
+ func_exit();
+ return ((sx_read_channel_byte (port, hi_ip) & IP_DCD) != 0);
+}
+
+
+/* Jeez. Isn't this simple? */
+static int sx_chars_in_buffer (void * ptr)
+{
+ struct sx_port *port = ptr;
+ func_enter2();
+
+ func_exit();
+ return ((sx_read_channel_byte (port, hi_txipos) -
+ sx_read_channel_byte (port, hi_txopos)) & 0xff);
+}
+
+
+static void sx_shutdown_port (void * ptr)
+{
+ struct sx_port *port = ptr;
+
+ func_enter();
+
+ port->gs.flags &= ~ GS_ACTIVE;
+ if (port->gs.tty && port->gs.tty->termios->c_cflag & HUPCL) {
+ sx_setsignals (port, 0, 0);
+ }
+
+ func_exit();
+}
+
+
+
+
+
+/* ********************************************************************** *
+ * Here are the routines that actually *
+ * interface with the rest of the system *
+ * ********************************************************************** */
+
+
+static int sx_fw_open(struct inode *inode, struct file *filp)
+{
+ func_enter ();
+ MOD_INC_USE_COUNT;
+ func_exit ();
+ return 0;
+}
+
+
+static INT sx_fw_release(struct inode *inode, struct file *filp)
+{
+ func_enter ();
+ MOD_DEC_USE_COUNT;
+ func_exit ();
+ return NO_ERROR;
+}
+
+
+static int sx_open (struct tty_struct * tty, struct file * filp)
+{
+ struct sx_port *port;
+ int retval, line;
+
+ func_enter();
+
+ if (!sx_initialized) {
+ return -EIO;
+ }
+
+ line = MINOR(tty->device);
+ sx_dprintk (SX_DEBUG_OPEN, "%d: opening line %d. tty=%p ctty=%p, np=%d)\n",
+ current->pid, line, tty, current->tty, sx_nports);
+
+ if ((line < 0) || (line >= SX_NPORTS) || (line >= sx_nports))
+ return -ENODEV;
+
+ port = & sx_ports[line];
+ port->c_dcd = 0; /* Make sure that the first interrupt doesn't detect a
+ 1 -> 0 transition. */
+
+
+ sx_dprintk (SX_DEBUG_OPEN, "port = %p c_dcd = %d\n", port, port->c_dcd);
+
+ tty->driver_data = port;
+ port->gs.tty = tty;
+ port->gs.count++;
+
+ sx_dprintk (SX_DEBUG_OPEN, "starting port\n");
+
+ /*
+ * Start up serial port
+ */
+ retval = gs_init_port(&port->gs);
+ sx_dprintk (SX_DEBUG_OPEN, "done gs_init\n");
+ if (retval) {
+ port->gs.count--;
+ return retval;
+ }
+
+ port->gs.flags |= GS_ACTIVE;
+ sx_setsignals (port, 1,1);
+
+ sx_dprintk (SX_DEBUG_OPEN, "before inc_use_count (count=%d.\n",
+ port->gs.count);
+ if (port->gs.count == 1) {
+ MOD_INC_USE_COUNT;
+ }
+ sx_dprintk (SX_DEBUG_OPEN, "after inc_use_count\n");
+
+#if 0
+ if (sx_debug & SX_DEBUG_OPEN)
+ my_hd ((unsigned char *)port, sizeof (*port));
+#else
+ if (sx_debug & SX_DEBUG_OPEN)
+ my_hd ((unsigned char *)port->board->base + port->ch_base,
+ sizeof (*port));
+#endif
+
+ if (sx_send_command (port, HS_LOPEN, -1, HS_IDLE_OPEN) != 1) {
+ printk (KERN_ERR "sx: Card didn't respond to LOPEN command.\n");
+ MOD_DEC_USE_COUNT;
+ port->gs.count--;
+ return -EIO;
+ }
+
+ retval = block_til_ready(port, filp);
+ sx_dprintk (SX_DEBUG_OPEN, "Block til ready returned %d. Count=%d\n",
+ retval, port->gs.count);
+
+ if (retval) {
+ MOD_DEC_USE_COUNT;
+ port->gs.count--;
+ return retval;
+ }
+ /* tty->low_latency = 1; */
+
+ if ((port->gs.count == 1) && (port->gs.flags & ASYNC_SPLIT_TERMIOS)) {
+ if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
+ *tty->termios = port->gs.normal_termios;
+ else
+ *tty->termios = port->gs.callout_termios;
+ sx_set_real_termios (port);
+ }
+
+ port->gs.session = current->session;
+ port->gs.pgrp = current->pgrp;
+ port->c_dcd = sx_get_CD (port);
+ sx_dprintk (SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd);
+ func_exit();
+ return 0;
+
+}
+
+
+/* I haven't the foggiest why the decrement use count has to happen
+ here. The whole linux serial drivers stuff needs to be redesigned.
+ My guess is that this is a hack to minimize the impact of a bug
+ elsewhere. Thinking about it some more. (try it sometime) Try
+ running minicom on a serial port that is driven by a modularized
+ driver. Have the modem hangup. Then remove the driver module. Then
+ exit minicom. I expect an "oops". -- REW */
+static void sx_hungup (void *ptr)
+{
+ func_enter ();
+ MOD_DEC_USE_COUNT;
+ func_exit ();
+}
+
+
+static void sx_close (void *ptr)
+{
+ struct sx_port *port = ptr;
+ /* Give the port 5 seconds to close down. */
+ int to = 5 * HZ;
+
+ func_enter ();
+ sx_send_command (port, HS_CLOSE, 0, 0);
+
+ while (to-- && (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED)) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout (1);
+ if (signal_pending (current))
+ break;
+ }
+ current->state = TASK_RUNNING;
+ if (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED) {
+ if (sx_send_command (port, HS_FORCE_CLOSED, -1, HS_IDLE_CLOSED) != 1) {
+ printk (KERN_ERR
+ "sx: sent the force_close command, but card didn't react\n");
+ } else
+ sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.\n");
+ }
+
+ sx_dprintk (SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%d\n",
+ 5 * HZ - to - 1, port->gs.count);
+
+ MOD_DEC_USE_COUNT;
+ func_exit ();
+}
+
+
+
+/* This is relatively thorough. But then again it is only 20 lines. */
+#define MARCHUP for (i=min;i<max;i++)
+#define MARCHDOWN for (i=max-1;i>=min;i--)
+#define W0 write_sx_byte (board, i, 0x55)
+#define W1 write_sx_byte (board, i, 0xaa)
+#define R0 if (read_sx_byte (board, i) != 0x55) return 1
+#define R1 if (read_sx_byte (board, i) != 0xaa) return 1
+
+/* This memtest takes a human-noticable time. You normally only do it
+ once a boot, so I guess that it is worth it. */
+int do_memtest (struct sx_board *board, int min, int max)
+{
+ int i;
+
+ /* This is a marchb. Theoretically, marchb catches much more than
+ simpler tests. In practise, the longer test just catches more
+ intermittent errors. -- REW
+ (For the theory behind memory testing see:
+ Testing Semiconductor Memories by A.J. van de Goor.) */
+ MARCHUP {W0;}
+ MARCHUP {R0;W1;R1;W0;R0;W1;}
+ MARCHUP {R1;W0;W1;}
+ MARCHDOWN {R1;W0;W1;W0;}
+ MARCHDOWN {R0;W1;W0;}
+
+ return 0;
+}
+
+
+#undef MARCHUP
+#undef MARCHDOWN
+#undef W0
+#undef W1
+#undef R0
+#undef R1
+
+#define MARCHUP for (i=min;i<max;i+=2)
+#define MARCHDOWN for (i=max-1;i>=min;i-=2)
+#define W0 write_sx_word (board, i, 0x55aa)
+#define W1 write_sx_word (board, i, 0xaa55)
+#define R0 if (read_sx_word (board, i) != 0x55aa) return 1
+#define R1 if (read_sx_word (board, i) != 0xaa55) return 1
+
+/* This memtest takes a human-noticable time. You normally only do it
+ once a boot, so I guess that it is worth it. */
+int do_memtest_w (struct sx_board *board, int min, int max)
+{
+ int i;
+
+ MARCHUP {W0;}
+ MARCHUP {R0;W1;R1;W0;R0;W1;}
+ MARCHUP {R1;W0;W1;}
+ MARCHDOWN {R1;W0;W1;W0;}
+ MARCHDOWN {R0;W1;W0;}
+
+ return 0;
+}
+
+
+static int sx_fw_ioctl (struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
+{
+ int rc = 0;
+ int *descr = (int *)arg, i;
+ static struct sx_board *board = NULL;
+ int nbytes, offset, data;
+ char *tmp;
+
+ func_enter();
+
+#if 0
+ /* Removed superuser check: Sysops can use the permissions on the device
+ file to restrict access. Recommendation: Root only. (root.root 600) */
+ if (!suser ()) {
+ return -EPERM;
+ }
+#endif
+
+ sx_dprintk (SX_DEBUG_FIRMWARE, "IOCTL %x: %lx\n", cmd, arg);
+
+ if (!board) board = &boards[0];
+ if (board->flags & SX_BOARD_PRESENT) {
+ sx_dprintk (SX_DEBUG_FIRMWARE, "Board present! (%x)\n",
+ board->flags);
+ } else {
+ sx_dprintk (SX_DEBUG_FIRMWARE, "Board not present! (%x) all:",
+ board->flags);
+ for (i=0;i< SX_NBOARDS;i++)
+ sx_dprintk (SX_DEBUG_FIRMWARE, "<%x> ", boards[i].flags);
+ sx_dprintk (SX_DEBUG_FIRMWARE, "\n");
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case SXIO_SET_BOARD:
+ sx_dprintk (SX_DEBUG_FIRMWARE, "set board to %ld\n", arg);
+ if (arg > SX_NBOARDS) return -EIO;
+ sx_dprintk (SX_DEBUG_FIRMWARE, "not out of range\n");
+ if (!(boards[arg].flags & SX_BOARD_PRESENT)) return -EIO;
+ sx_dprintk (SX_DEBUG_FIRMWARE, ".. and present!\n");
+ board = &boards[arg];
+ break;
+ case SXIO_GET_TYPE:
+ rc = IS_SX_BOARD (board)? SX_TYPE_SX:SX_TYPE_SI;
+ sx_dprintk (SX_DEBUG_FIRMWARE, "returning type= %d\n", rc);
+ break;
+ case SXIO_DO_RAMTEST:
+ if (sx_initialized) /* Already initialized: better not ramtest the board. */
+ return -EPERM;
+ if (IS_SX_BOARD (board)) {
+ rc = do_memtest (board, 0, 0x7000);
+ if (!rc) rc = do_memtest (board, 0, 0x7000);
+ /*if (!rc) rc = do_memtest_w (board, 0, 0x7000);*/
+ } else {
+ rc = do_memtest (board, 0, 0x7ff8);
+ /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */
+ }
+ sx_dprintk (SX_DEBUG_FIRMWARE, "returning memtest result= %d\n", rc);
+ break;
+ case SXIO_DOWNLOAD:
+ if (sx_initialized) /* Already initialized */
+ return -EEXIST;
+ if (!sx_reset (board))
+ return -EIO;
+ sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
+
+ tmp = kmalloc (SX_CHUNK_SIZE, GFP_USER);
+ if (!tmp) return -ENOMEM;
+ Get_user (nbytes, descr++);
+ Get_user (offset, descr++);
+ Get_user (data, descr++);
+ while (nbytes && data) {
+ for (i=0;i<nbytes;i += SX_CHUNK_SIZE) {
+ copy_from_user (tmp, (char *)data+i,
+ (i+SX_CHUNK_SIZE>nbytes)?nbytes-i:SX_CHUNK_SIZE);
+ memcpy_toio ((char *) (board->base + offset + i), tmp,
+ (i+SX_CHUNK_SIZE>nbytes)?nbytes-i:SX_CHUNK_SIZE);
+ }
+
+ Get_user (nbytes, descr++);
+ Get_user (offset, descr++);
+ Get_user (data, descr++);
+ }
+ kfree (tmp);
+ sx_nports += sx_init_board (board);
+ rc = sx_nports;
+ break;
+ case SXIO_INIT:
+ if (sx_initialized) /* Already initialized */
+ return -EEXIST;
+ /* This is not allowed until all boards are initialized... */
+ for (i=0;i<SX_NBOARDS;i++) {
+ if ( (boards[i].flags & SX_BOARD_PRESENT) &&
+ !(boards[i].flags & SX_BOARD_INITIALIZED))
+ return -EIO;
+ }
+ for (i=0;i<SX_NBOARDS;i++)
+ if (!(boards[i].flags & SX_BOARD_PRESENT)) break;
+
+ sx_dprintk (SX_DEBUG_FIRMWARE, "initing portstructs, %d boards, "
+ "%d channels, first board: %d ports\n",
+ i, sx_nports, boards[0].nports);
+ rc = sx_init_portstructs (i, sx_nports);
+ sx_init_drivers ();
+ if (rc >= 0)
+ sx_initialized++;
+ break;
+ case SXIO_SETDEBUG:
+ sx_debug = arg;
+ break;
+ case SXIO_GETDEBUG:
+ rc = sx_debug;
+ break;
+ case SXIO_SETGSDEBUG:
+ gs_debug = arg;
+ break;
+ case SXIO_GETGSDEBUG:
+ rc = gs_debug;
+ break;
+ default:
+ printk (KERN_WARNING "Unknown ioctl on firmware device (%x).\n", cmd);
+ break;
+ }
+ func_exit ();
+ return rc;
+}
+
+
+static int sx_ioctl (struct tty_struct * tty, struct file * filp,
+ unsigned int cmd, unsigned long arg)
+{
+ int rc;
+ struct sx_port *port = tty->driver_data;
+ int ival;
+
+ /* func_enter2(); */
+
+ rc = 0;
+ switch (cmd) {
+ case TIOCGSOFTCAR:
+ rc = Put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
+ (unsigned int *) arg);
+ break;
+ case TIOCSSOFTCAR:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(int))) == 0) {
+ Get_user(ival, (unsigned int *) arg);
+ tty->termios->c_cflag =
+ (tty->termios->c_cflag & ~CLOCAL) |
+ (ival ? CLOCAL : 0);
+ }
+ break;
+ case TIOCGSERIAL:
+ if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(struct serial_struct))) == 0)
+ gs_getserial(&port->gs, (struct serial_struct *) arg);
+ break;
+ case TIOCSSERIAL:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(struct serial_struct))) == 0)
+ rc = gs_setserial(&port->gs, (struct serial_struct *) arg);
+ break;
+ case TIOCMGET:
+ if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(unsigned int))) == 0) {
+ ival = sx_getsignals(port);
+ put_user(ival, (unsigned int *) arg);
+ }
+ break;
+ case TIOCMBIS:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(unsigned int))) == 0) {
+ Get_user(ival, (unsigned int *) arg);
+ sx_setsignals(port, ((ival & TIOCM_DTR) ? 1 : -1),
+ ((ival & TIOCM_RTS) ? 1 : -1));
+ }
+ break;
+ case TIOCMBIC:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(unsigned int))) == 0) {
+ Get_user(ival, (unsigned int *) arg);
+ sx_setsignals(port, ((ival & TIOCM_DTR) ? 0 : -1),
+ ((ival & TIOCM_RTS) ? 0 : -1));
+ }
+ break;
+ case TIOCMSET:
+ if ((rc = verify_area(VERIFY_READ, (void *) arg,
+ sizeof(unsigned int))) == 0) {
+ Get_user(ival, (unsigned int *) arg);
+ sx_setsignals(port, ((ival & TIOCM_DTR) ? 1 : 0),
+ ((ival & TIOCM_RTS) ? 1 : 0));
+ }
+ break;
+
+ default:
+ rc = -ENOIOCTLCMD;
+ break;
+ }
+
+ /* func_exit(); */
+ return rc;
+}
+
+
+/* The throttle/unthrottle scheme for the Specialix card is different
+ * from other drivers and deserves some explanation.
+ * The Specialix hardware takes care of XON/XOFF
+ * and CTS/RTS flow control itself. This means that all we have to
+ * do when signalled by the upper tty layer to throttle/unthrottle is
+ * to make a note of it here. When we come to read characters from the
+ * rx buffers on the card (sx_receive_chars()) we look to see if the
+ * upper layer can accept more (as noted here in sx_rx_throt[]).
+ * If it can't we simply don't remove chars from the cards buffer.
+ * When the tty layer can accept chars, we again note that here and when
+ * sx_receive_chars() is called it will remove them from the cards buffer.
+ * The card will notice that a ports buffer has drained below some low
+ * water mark and will unflow control the line itself, using whatever
+ * flow control scheme is in use for that port. -- Simon Allen
+ */
+
+static void sx_throttle (struct tty_struct * tty)
+{
+ struct sx_port *port = (struct sx_port *)tty->driver_data;
+
+ func_enter2();
+ /* If the port is using any type of input flow
+ * control then throttle the port.
+ */
+ if((tty->termios->c_cflag & CRTSCTS) || (I_IXOFF(tty)) ) {
+ port->gs.flags |= SX_RX_THROTTLE;
+ }
+ func_exit();
+}
+
+
+static void sx_unthrottle (struct tty_struct * tty)
+{
+ struct sx_port *port = (struct sx_port *)tty->driver_data;
+
+ func_enter2();
+ /* Always unthrottle even if flow control is not enabled on
+ * this port in case we disabled flow control while the port
+ * was throttled
+ */
+ port->gs.flags &= ~SX_RX_THROTTLE;
+ func_exit();
+ return;
+}
+
+
+/* ********************************************************************** *
+ * Here are the initialization routines. *
+ * ********************************************************************** */
+
+
+
+
+static int sx_init_board (struct sx_board *board)
+{
+ int addr;
+ int chans;
+ int type;
+
+ func_enter();
+
+ /* This is preceded by downloading the download code. */
+
+ board->flags |= SX_BOARD_INITIALIZED;
+
+ /* This resets the processor again, to make sure it didn't do any
+ foolish things while we were downloading the image */
+ if (!sx_reset (board))
+ return 0;
+
+ sx_start_board (board);
+
+ if (!sx_busy_wait_neq (board, 0, 0xff, 0)) {
+ printk (KERN_ERR "sx: Ooops. Board won't initialize.\n");
+ return 0;
+ }
+
+ /* Ok. So now the processor on the card is running. It gathered
+ some info for us... */
+ sx_dprintk (SX_DEBUG_INIT, "The sxcard structure:\n");
+ if (sx_debug & SX_DEBUG_INIT) my_hd ((char *)(board->base), 0x10);
+ sx_dprintk (SX_DEBUG_INIT, "the first sx_module structure:\n");
+ if (sx_debug & SX_DEBUG_INIT) my_hd ((char *)(board->base + 0x80), 0x30);
+
+ sx_dprintk (SX_DEBUG_INIT,
+ "init_status: %x, %dk memory, firmware V%x.%02x,\n",
+ read_sx_byte (board, 0), read_sx_byte(board, 1),
+ read_sx_byte (board, 5), read_sx_byte(board, 4));
+
+ if (read_sx_byte (board, 0) == 0xff) {
+ printk (KERN_INFO "sx: No modules found. Sorry.\n");
+ board->nports = 0;
+ return 0;
+ }
+
+ chans = 0;
+
+ if (IS_SX_BOARD(board)) {
+ sx_write_board_word (board, cc_int_count, sx_maxints);
+ } else {
+ if (sx_maxints)
+ sx_write_board_word (board, cc_int_count, SI_PROCESSOR_CLOCK/8/sx_maxints);
+ }
+
+ /* grab the first module type... */
+ /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */
+ board->ta_type = mod_compat_type (sx_read_module_byte (board, 0x80, mc_chip));
+
+ /* XXX byteorder */
+ for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) {
+ type = sx_read_module_byte (board, addr, mc_chip);
+ sx_dprintk (SX_DEBUG_INIT, "Module at %x: %d channels\n",
+ addr, read_sx_byte (board, addr + 2));
+
+ chans += sx_read_module_byte (board, addr, mc_type);
+
+ sx_dprintk (SX_DEBUG_INIT, "module is an %s, which has %s/%s panels\n",
+ mod_type_s (type),
+ pan_type_s (sx_read_module_byte (board, addr, mc_mods) & 0xf),
+ pan_type_s (sx_read_module_byte (board, addr, mc_mods) >> 4));
+
+ sx_dprintk (SX_DEBUG_INIT, "CD1400 versions: %x/%x, ASIC version: %x\n",
+ sx_read_module_byte (board, addr, mc_rev1),
+ sx_read_module_byte (board, addr, mc_rev2),
+ sx_read_module_byte (board, addr, mc_mtaasic_rev));
+
+ /* The following combinations are illegal: It should theoretically
+ work, but timing problems make the bus HANG. */
+
+ if (mod_compat_type (type) != board->ta_type) {
+ printk (KERN_ERR "sx: This is an invalid configuration.\n"
+ "Don't mix TA/MTA/SXDC on the same hostadapter.\n");
+ chans=0;
+ break;
+ }
+ if (IS_SI_BOARD(board) && (mod_compat_type(type) == 4)) {
+ printk (KERN_ERR "sx: This is an invalid configuration.\n"
+ "Don't use SXDCs on an SI/XIO adapter.\n");
+ chans=0;
+ break;
+ }
+#if 0 /* Problem fixed: firmware 3.05 */
+ if (IS_SX_BOARD(board) && (type == TA8)) {
+ /* There are some issues with the firmware and the DCD/RTS
+ lines. It might work if you tie them together or something.
+ It might also work if you get a newer sx_firmware. Therefore
+ this is just a warning. */
+ printk (KERN_WARNING "sx: The SX host doesn't work too well "
+ "with the TA8 adapters.\nSpecialix is working on it.\n");
+ }
+#endif
+ }
+
+ if (chans) {
+ /* board->flags |= SX_BOARD_PRESENT; */
+ if(board->irq > 0) {
+ /* fixed irq, probably PCI */
+ if(sx_irqmask & (1 << board->irq)) { /* may we use this irq? */
+ if(request_irq(board->irq, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board)) {
+ printk(KERN_ERR "sx: Cannot allocate irq %d.\n", board->irq);
+ board->irq = 0;
+ }
+ } else
+ board->irq = 0;
+ } else if(board->irq < 0 && sx_irqmask) {
+ /* auto-allocate irq */
+ int irqnr;
+ int irqmask = sx_irqmask & (IS_SX_BOARD(board) ? SX_ISA_IRQ_MASK : SI2_ISA_IRQ_MASK);
+ for(irqnr = 15; irqnr > 0; irqnr--)
+ if(irqmask & (1 << irqnr))
+ if(! request_irq(irqnr, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board))
+ break;
+ if(! irqnr)
+ printk(KERN_ERR "sx: Cannot allocate IRQ.\n");
+ board->irq = irqnr;
+ } else
+ board->irq = 0;
+
+ if (board->irq) {
+ /* Found a valid interrupt, start up interrupts! */
+ sx_dprintk (SX_DEBUG_INIT, "Using irq %d.\n", board->irq);
+ sx_start_interrupts (board);
+ board->poll = sx_slowpoll;
+ board->flags |= SX_IRQ_ALLOCATED;
+ } else {
+ /* no irq: setup board for polled operation */
+ board->poll = sx_poll;
+ sx_dprintk (SX_DEBUG_INIT, "Using poll-interval %d.\n", board->poll);
+ }
+
+ /* The timer should be initialized anyway: That way we can safely
+ del_timer it when the module is unloaded. */
+ init_timer (&board->timer);
+
+ if (board->poll) {
+ board->timer.data = (unsigned long) board;
+ board->timer.function = sx_pollfunc;
+ board->timer.expires = jiffies + board->poll;
+ add_timer (&board->timer);
+ }
+ } else {
+ board->irq = 0;
+ }
+
+ board->nports = chans;
+ sx_dprintk (SX_DEBUG_INIT, "returning %d ports.", board->nports);
+
+ func_exit();
+ return chans;
+}
+
+
+void printheader(void)
+{
+ static int header_printed = 0;
+
+ if (!header_printed) {
+ printk (KERN_INFO "Specialix SX driver "
+ "(C) 1998/1999 R.E.Wolff@BitWizard.nl \n");
+ printk (KERN_INFO "sx: version %s\n", RCS_ID);
+ header_printed = 1;
+ }
+}
+
+
+int probe_sx (struct sx_board *board)
+{
+ struct vpd_prom vpdp;
+ char *p;
+ int i;
+
+ func_enter();
+ sx_dprintk (SX_DEBUG_PROBE, "Going to verify vpd prom at %x.\n",
+ board->base + SX_VPD_ROM);
+
+ if (sx_debug & SX_DEBUG_PROBE)
+ my_hd ((char *)(board->base + SX_VPD_ROM), 0x40);
+
+ p = (char *) &vpdp;
+ for (i=0;i< sizeof (struct vpd_prom);i++)
+ *p++ = read_sx_byte (board, SX_VPD_ROM + i*2);
+
+ if (sx_debug & SX_DEBUG_PROBE)
+ my_hd ((char *)&vpdp, 0x20);
+
+ sx_dprintk (SX_DEBUG_PROBE, "checking identifier...\n");
+
+ if (strncmp (vpdp.identifier, SX_VPD_IDENT_STRING, 16) != 0) {
+ sx_dprintk (SX_DEBUG_PROBE, "Got non-SX identifier: '%s'\n",
+ vpdp.identifier);
+ return 0;
+ }
+
+ printheader ();
+
+ printk (KERN_DEBUG "sx: Found an SX board at %x\n", board->hw_base);
+ printk (KERN_DEBUG "sx: hw_rev: %d, assembly level: %d, uniq ID:%08x, ",
+ vpdp.hwrev, vpdp.hwass, vpdp.uniqid);
+ printk ( "Manufactured: %d/%d\n",
+ 1970 + vpdp.myear, vpdp.mweek);
+
+
+ if ((((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_PCI_UNIQUEID1) &&
+ (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_ISA_UNIQUEID1)) {
+ /* This might be a bit harsh. This was the primary reason the
+ SX/ISA card didn't work at first... */
+ printk (KERN_ERR "sx: Hmm. Not an SX/PCI or SX/ISA card. Sorry: giving up.\n");
+ return (0);
+ }
+
+ if (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) == SX_ISA_UNIQUEID1) {
+ if (board->base & 0x8000) {
+ printk (KERN_WARNING "sx: Warning: There may be hardware problems with the card at %x.\n", board->base);
+ printk (KERN_WARNING "sx: Read sx.txt for more info.\n");
+ }
+ }
+
+
+ board->nports = -1;
+
+ /* This resets the processor, and keeps it off the bus. */
+ if (!sx_reset (board))
+ return 0;
+ sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
+
+ board->flags |= SX_BOARD_PRESENT;
+
+ func_exit();
+ return 1;
+}
+
+
+
+/* Specialix probes for this card at 32k increments from 640k to 16M.
+ I consider machines with less than 16M unlikely nowadays, so I'm
+ not probing above 1Mb. Also, 0xa0000, 0xb0000, are taken by the VGA
+ card. 0xe0000 and 0xf0000 are taken by the BIOS. That only leaves
+ 0xc0000, 0xc8000, 0xd0000 and 0xd8000 . */
+
+int probe_si (struct sx_board *board)
+{
+ int i;
+
+ func_enter();
+ sx_dprintk (SX_DEBUG_PROBE, "Going to verify SI signature %x.\n",
+ board->base + SI2_ISA_ID_BASE);
+
+ if (sx_debug & SX_DEBUG_PROBE)
+ my_hd ((char *)(board->base + SI2_ISA_ID_BASE), 0x8);
+
+ for (i=0;i<8;i++) {
+ if ((read_sx_byte (board, SI2_ISA_ID_BASE+7-i) & 7) != i) {
+ return 0;
+ }
+ }
+
+ printheader ();
+
+ printk (KERN_DEBUG "sx: Found an SI board at %x\n", board->hw_base);
+ /* Compared to the SX boards, it is a complete guess as to what
+ this card is up to... */
+
+ board->nports = -1;
+
+ /* This resets the processor, and keeps it off the bus. */
+ if (!sx_reset (board))
+ return 0;
+ sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
+
+ board->flags |= SX_BOARD_PRESENT;
+
+ func_exit();
+ return 1;
+}
+
+
+static int sx_init_drivers(void)
+{
+ int error;
+
+ func_enter();
+
+ memset(&sx_driver, 0, sizeof(sx_driver));
+ sx_driver.magic = TTY_DRIVER_MAGIC;
+ sx_driver.driver_name = "specialix_sx";
+ sx_driver.name = "ttyX";
+ sx_driver.major = SX_NORMAL_MAJOR;
+ sx_driver.num = sx_nports;
+ sx_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ sx_driver.subtype = SX_TYPE_NORMAL;
+ sx_driver.init_termios = tty_std_termios;
+ sx_driver.init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ sx_driver.flags = TTY_DRIVER_REAL_RAW;
+ sx_driver.refcount = &sx_refcount;
+ sx_driver.table = sx_table;
+ sx_driver.termios = sx_termios;
+ sx_driver.termios_locked = sx_termios_locked;
+
+ sx_driver.open = sx_open;
+ sx_driver.close = gs_close;
+ sx_driver.write = gs_write;
+ sx_driver.put_char = gs_put_char;
+ sx_driver.flush_chars = gs_flush_chars;
+ sx_driver.write_room = gs_write_room;
+ sx_driver.chars_in_buffer = gs_chars_in_buffer;
+ sx_driver.flush_buffer = gs_flush_buffer;
+ sx_driver.ioctl = sx_ioctl;
+ sx_driver.throttle = sx_throttle;
+ sx_driver.unthrottle = sx_unthrottle;
+ sx_driver.set_termios = gs_set_termios;
+ sx_driver.stop = gs_stop;
+ sx_driver.start = gs_start;
+ sx_driver.hangup = gs_hangup;
+
+ sx_callout_driver = sx_driver;
+ sx_callout_driver.name = "cux";
+ sx_callout_driver.major = SX_CALLOUT_MAJOR;
+ sx_callout_driver.subtype = SX_TYPE_CALLOUT;
+
+ if ((error = tty_register_driver(&sx_driver))) {
+ printk(KERN_ERR "sx: Couldn't register sx driver, error = %d\n",
+ error);
+ return 1;
+ }
+ if ((error = tty_register_driver(&sx_callout_driver))) {
+ tty_unregister_driver(&sx_driver);
+ printk(KERN_ERR "sx: Couldn't register sx callout driver, error = %d\n",
+ error);
+ return 1;
+ }
+
+ func_exit();
+ return 0;
+}
+
+
+void * ckmalloc (int size)
+{
+ void *p;
+
+ p = kmalloc(size, GFP_KERNEL);
+ if (p)
+ memset(p, 0, size);
+ return p;
+}
+
+
+static int sx_init_portstructs (int nboards, int nports)
+{
+ struct sx_board *board;
+ struct sx_port *port;
+ int i, j;
+ int addr, chans;
+ int portno;
+
+ func_enter();
+
+ /* Many drivers statically allocate the maximum number of ports
+ There is no reason not to allocate them dynamically. Is there? -- REW */
+ sx_ports = ckmalloc(nports * sizeof (struct sx_port));
+ if (!sx_ports)
+ return -ENOMEM;
+
+ sx_termios = ckmalloc(nports * sizeof (struct termios *));
+ if (!sx_termios) {
+ kfree (sx_ports);
+ return -ENOMEM;
+ }
+
+ sx_termios_locked = ckmalloc(nports * sizeof (struct termios *));
+ if (!sx_termios_locked) {
+ kfree (sx_ports);
+ kfree (sx_termios);
+ return -ENOMEM;
+ }
+
+ /* Adjust the values in the "driver" */
+ sx_driver.termios = sx_termios;
+ sx_driver.termios_locked = sx_termios_locked;
+
+ port = sx_ports;
+ for (i = 0; i < nboards; i++) {
+ board = &boards[i];
+ board->ports = port;
+ for (j=0; j < boards[i].nports;j++) {
+ sx_dprintk (SX_DEBUG_INIT, "initing port %d\n", j);
+ port->gs.callout_termios = tty_std_termios;
+ port->gs.normal_termios = tty_std_termios;
+ port->gs.magic = SX_MAGIC;
+ port->gs.close_delay = HZ/2;
+ port->gs.closing_wait = 30 * HZ;
+ port->board = board;
+ port->gs.rd = &sx_real_driver;
+#ifdef NEW_WRITE_LOCKING
+ port->gs.port_write_sem = MUTEX;
+#endif
+ port++;
+ }
+ }
+
+ port = sx_ports;
+ portno = 0;
+ for (i = 0; i < nboards; i++) {
+ board = &boards[i];
+ board->port_base = portno;
+ /* Possibly the configuration was rejected. */
+ sx_dprintk (SX_DEBUG_PROBE, "Board has %d channels\n", board->nports);
+ if (board->nports <= 0) continue;
+ /* XXX byteorder ?? */
+ for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) {
+ chans = sx_read_module_byte (board, addr, mc_type);
+ sx_dprintk (SX_DEBUG_PROBE, "Module at %x: %d channels\n", addr, chans);
+ sx_dprintk (SX_DEBUG_PROBE, "Port at");
+ for (j=0;j<chans;j++) {
+ /* The "sx-way" is the way it SHOULD be done. That way in the
+ future, the firmware may for example pack the structures a bit
+ more efficient. Neil tells me it isn't going to happen anytime
+ soon though. */
+ if (IS_SX_BOARD(board))
+ port->ch_base = sx_read_module_word (board, addr+j*2, mc_chan_pointer);
+ else
+ port->ch_base = addr + 0x100 + 0x300*j;
+
+ sx_dprintk (SX_DEBUG_PROBE, " %x", port->ch_base);
+ port->line = portno++;
+ port++;
+ }
+ sx_dprintk (SX_DEBUG_PROBE, "\n");
+ }
+ /* This has to be done earlier. */
+ /* board->flags |= SX_BOARD_INITIALIZED; */
+ }
+
+ func_exit();
+ return 0;
+}
+
+
+static void sx_release_drivers(void)
+{
+ func_enter();
+ tty_unregister_driver(&sx_driver);
+ tty_unregister_driver(&sx_callout_driver);
+ func_exit();
+}
+
+#ifdef TWO_ZERO
+#define PDEV unsigned char pci_bus, unsigned pci_fun
+#define pdev pci_bus, pci_fun
+#else
+#define PDEV struct pci_dev *pdev
+#endif
+
+
+#ifdef CONFIG_PCI
+ /********************************************************
+ * Setting bit 17 in the CNTRL register of the PLX 9050 *
+ * chip forces a retry on writes while a read is pending.*
+ * This is to prevent the card locking up on Intel Xeon *
+ * multiprocessor systems with the NX chipset. -- NV *
+ ********************************************************/
+
+/* Newer cards are produced with this bit set from the configuration
+ EEprom. As the bit is read/write for the CPU, we can fix it here,
+ if we detect that it isn't set correctly. -- REW */
+
+void fix_sx_pci (PDEV, struct sx_board *board)
+{
+ unsigned int hwbase;
+ unsigned long rebase;
+ int t;
+
+#define CNTRL_REG_OFFSET 0x14
+
+ pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase);
+ hwbase &= PCI_BASE_ADDRESS_MEM_MASK;
+ rebase = (ulong) ioremap(hwbase, 0x80);
+ t = readb (rebase + CNTRL_REG_OFFSET*4 + 2);
+ if (t != 0x06) {
+ printk (KERN_DEBUG "sx: performing cntrl reg fix: %02x -> 06\n", t);
+ writeb (0x06, rebase + CNTRL_REG_OFFSET*4+2);
+ }
+ my_iounmap (hwbase, rebase);
+
+}
+#endif
+
+
+#ifdef MODULE
+#define sx_init init_module
+#endif
+
+int sx_init(void)
+{
+ int i;
+ int found = 0;
+ struct sx_board *board;
+
+#ifdef CONFIG_PCI
+#ifndef TWO_ZERO
+ struct pci_dev *pdev = NULL;
+#else
+ unsigned char pci_bus, pci_fun;
+ /* in 2.2.x pdev is a pointer defining a PCI device. In 2.0 its the bus/fn */
+#endif
+ unsigned int tint;
+ unsigned short tshort;
+#endif
+
+ func_enter();
+ sx_dprintk (SX_DEBUG_INIT, "Initing sx module... (sx_debug=%d)\n", sx_debug);
+ if (abs ((long) (&sx_debug) - sx_debug) < 0x10000) {
+ printk (KERN_WARNING "sx: sx_debug is an address, instead of a value. "
+ "Assuming -1.\n");
+ printk ("(%p)\n", &sx_debug);
+ sx_debug=-1;
+ }
+
+#ifdef CONFIG_PCI
+ if (pci_present ()) {
+#ifndef TWO_ZERO
+ while ((pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX,
+ PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8,
+ pdev))) {
+#else
+ for (i=0;i< SX_NBOARDS;i++) {
+ if (pcibios_find_device (PCI_VENDOR_ID_SPECIALIX,
+ PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, i,
+ &pci_bus, &pci_fun)) break;
+#endif
+ /* Specialix has a whole bunch of cards with
+ 0x2000 as the device ID. They say its because
+ the standard requires it. Stupid standard. */
+ /* It seems that reading a word doesn't work reliably on 2.0.
+ Also, reading a non-aligned dword doesn't work. So we read the
+ whole dword at 0x2c and extract the word at 0x2e (SUBSYSTEM_ID)
+ ourselves */
+ /* I don't know why the define doesn't work, constant 0x2c does --REW */
+ pci_read_config_dword (pdev, 0x2c, &tint);
+ tshort = (tint >> 16) & 0xffff;
+ sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x.\n", tint);
+ /* sx_dprintk (SX_DEBUG_PROBE, "pdev = %d/%d (%x)\n", pdev, tint); */
+ if (tshort != 0x0200) {
+ sx_dprintk (SX_DEBUG_PROBE, "But it's not an SX card (%d)...\n",
+ tshort);
+ continue;
+ }
+ board = &boards[found];
+
+ pci_read_config_dword(pdev, PCI_BASE_ADDRESS_2, &tint);
+ board->hw_base = tint & PCI_BASE_ADDRESS_MEM_MASK;
+ board->base = (ulong) ioremap(board->hw_base, SX_WINDOW_LEN);
+ board->irq = get_irq (pdev);
+ board->flags &= ~SX_BOARD_TYPE;
+ board->flags |= SX_PCI_BOARD;
+
+ sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x/%x(%d).\n",
+ tint, boards[found].base, board->irq);
+
+ if (probe_sx (board)) {
+ found++;
+ fix_sx_pci (pdev, board);
+ } else
+ my_iounmap (board->hw_base, board->base);
+ }
+ }
+#endif
+
+ for (i=0;i<NR_SX_ADDRS;i++) {
+ board = &boards[found];
+ board->hw_base = sx_probe_addrs[i];
+ board->base = (ulong) ioremap(board->hw_base, SX_WINDOW_LEN);
+ board->flags &= ~SX_BOARD_TYPE;
+ board->flags |= SX_ISA_BOARD;
+ board->irq = sx_irqmask?-1:0;
+
+ if (probe_sx (board)) {
+ found++;
+ } else {
+ my_iounmap (board->hw_base, board->base);
+ }
+ }
+
+ for (i=0;i<NR_SI_ADDRS;i++) {
+ board = &boards[found];
+ board->hw_base = si_probe_addrs[i];
+ board->base = (ulong) ioremap(board->hw_base, SI2_ISA_WINDOW_LEN);
+ board->flags &= ~SX_BOARD_TYPE;
+ board->flags |= SI_ISA_BOARD;
+ board->irq = sx_irqmask ?-1:0;
+
+ if (probe_si (board)) {
+ found++;
+ } else {
+ my_iounmap (board->hw_base, board->base);
+ }
+ }
+
+ if (found) {
+ printk (KERN_INFO "sx: total of %d boards detected.\n", found);
+
+ if (misc_register(&sx_fw_device) < 0) {
+ printk(KERN_ERR "SX: Unable to register firmware loader driver.\n");
+ return -EIO;
+ }
+ }
+
+ func_exit();
+ return found?0:-EIO;
+}
+
+
+
+void cleanup_module(void)
+{
+ int i;
+ struct sx_board *board;
+
+ func_enter();
+ for (i = 0; i < SX_NBOARDS; i++) {
+ board = &boards[i];
+ if (board->flags & SX_BOARD_INITIALIZED) {
+ sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up board at %x\n", board->base);
+ /* The board should stop messing with us.
+ (actually I mean the interrupt) */
+ sx_reset (board);
+ if ((board->irq) && (board->flags & SX_IRQ_ALLOCATED))
+ free_irq (board->irq, board);
+
+ /* It is safe/allowed to del_timer a non-active timer */
+ del_timer (& board->timer);
+ my_iounmap (board->hw_base, board->base);
+ }
+ }
+ if (misc_deregister(&sx_fw_device) < 0) {
+ printk (KERN_INFO "sx: couldn't deregister firmware loader device\n");
+ }
+ sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up drivers (%d)\n", sx_initialized);
+ if (sx_initialized)
+ sx_release_drivers ();
+
+ kfree (sx_ports);
+ kfree (sx_termios);
+ kfree (sx_termios_locked);
+ func_exit();
+}
+
+
+#ifdef DEBUG
+void my_hd (unsigned char *addr, int len)
+{
+ int i, j, ch;
+
+ for (i=0;i<len;i+=16) {
+ printk ("%08x ", (int) addr+i);
+ for (j=0;j<16;j++) {
+ printk ("%02x %s", addr[j+i], (j==7)?" ":"");
+ }
+ for (j=0;j<16;j++) {
+ ch = addr[j+i];
+ printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
+ }
+ printk ("\n");
+ }
+}
+#endif
+
+#ifdef MODULE
+#undef func_enter
+#undef func_exit
+
+#include "generic_serial.c"
+#endif
+
+
+/*
+ * Anybody who knows why this doesn't work for me, please tell me -- REW.
+ * Snatched from scsi.c (fixed one spelling error):
+ * Overrides for Emacs so that we follow Linus' tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 4
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -4
+ * c-argdecl-indent: 4
+ * c-label-offset: -4
+ * c-continued-statement-offset: 4
+ * c-continued-brace-offset: 0
+ * indent-tabs-mode: nil
+ * tab-width: 8
+ * End:
+ */
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