sx.c
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- /* sx.c -- driver for the Specialix SX series cards.
- *
- * This driver will also support the older SI, and XIO cards.
- *
- *
- * (C) 1998 - 2000 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 1.33 2000/03/09 10:00:00 pvdl,wolff
- * - Fixed module and port counting
- * - Fixed signal handling
- * - Fixed an Ooops
- *
- * Revision 1.32 2000/03/07 09:00:00 wolff,pvdl
- * - Fixed some sx_dprintk typos
- * - added detection for an invalid board/module configuration
- *
- * Revision 1.31 2000/03/06 12:00:00 wolff,pvdl
- * - Added support for EISA
- *
- * Revision 1.30 2000/01/21 17:43:06 wolff
- * - Added support for SX+
- *
- * 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 1.33 2000/03/08 10:01:02 wolff, pvdl Exp $"
- #define RCS_REV "$Revision: 1.33 $"
- #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/slab.h>
- #include <linux/init.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"
- #include <linux/compatmac.h>
- #include <linux/generic_serial.h>
- #include "sx.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. */
- /* Why the hell am I defining these here? */
- #define SX_TYPE_NORMAL 1
- #define SX_TYPE_CALLOUT 2
- #ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
- #define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
- #endif
- static struct pci_device_id sx_pci_tbl[] = {
- { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, PCI_ANY_ID, PCI_ANY_ID },
- { 0 }
- };
- MODULE_DEVICE_TABLE(pci, sx_pci_tbl);
- /* 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 int 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_init_drivers(void);
- static struct tty_driver sx_driver, sx_callout_driver;
- static struct tty_struct * sx_table[SX_NPORTS];
- static struct termios ** sx_termios;
- static struct termios ** sx_termios_locked;
- static struct sx_board boards[SX_NBOARDS];
- static struct sx_port *sx_ports;
- static int sx_refcount;
- static int sx_initialized;
- static int sx_nports;
- static int sx_debug;
- /* 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....
- */
- static int sx_poll = 1;
- static int sx_slowpoll;
- /* 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...
- */
- static int sx_maxints = 100;
- /* These are the only open spaces in my computer. Yours may have more
- or less.... -- REW
- duh: Card at 0xa0000 is possible on HP Netserver?? -- pvdl
- */
- static int sx_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
- 0xc8000, 0xd8000, 0xe8000};
- static int si_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
- 0xc8000, 0xd8000, 0xe8000, 0xa0000};
- static int si1_probe_addrs[]= { 0xd0000};
- #define NR_SX_ADDRS (sizeof(sx_probe_addrs)/sizeof (int))
- #define NR_SI_ADDRS (sizeof(si_probe_addrs)/sizeof (int))
- #define NR_SI1_ADDRS (sizeof(si1_probe_addrs)/sizeof (int))
- /* Set the mask to all-ones. This alas, only supports 32 interrupts.
- Some architectures may need more. */
- static int sx_irqmask = -1;
- MODULE_PARM(sx_probe_addrs, "i");
- MODULE_PARM(si_probe_addrs, "i");
- 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");
- MODULE_LICENSE("GPL");
- 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,
- };
- /*
- 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 %sb",__FUNCTION__)
- #define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit %sn", __FUNCTION__)
- #define func_enter2() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s (port %d)n",
- __FUNCTION__, port->line)
- /*
- * Firmware loader driver specific routines
- *
- */
- static struct file_operations sx_fw_fops = {
- owner: THIS_MODULE,
- ioctl: sx_fw_ioctl,
- };
- static 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 %sn";
- static const char *badinfo =
- KERN_ERR "sx: Warning: null sx port for device %s in %sn";
-
- 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
- #ifdef DEBUG
- static void my_hd (unsigned char *addr, int len)
- {
- int i, j, ch;
- for (i=0;i<len;i+=16) {
- printk ("%p ", 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
- /* This needs redoing for Alpha -- REW -- Done. */
- static inline void write_sx_byte (struct sx_board *board, int offset, u8 byte)
- {
- writeb (byte, board->base+offset);
- }
- static inline u8 read_sx_byte (struct sx_board *board, int offset)
- {
- return readb (board->base+offset);
- }
- static inline void write_sx_word (struct sx_board *board, int offset, u16 word)
- {
- writew (word, board->base+offset);
- }
- static inline u16 read_sx_word (struct sx_board *board, int offset)
- {
- return readw (board->base + offset);
- }
- static 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;
- }
- static 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 */
- static 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 if (IS_EISA_BOARD(board)) {
- outb(board->irq<<4, board->eisa_base+0xc02);
- } else if (IS_SI1_BOARD(board)) {
- write_sx_byte (board, SI1_ISA_RESET, 0); // value does not matter
- } 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))
- static int sx_start_board (struct sx_board *board)
- {
- if (IS_SX_BOARD (board)) {
- write_sx_byte (board, SX_CONFIG, SX_CONF_BUSEN);
- } else if (IS_EISA_BOARD(board)) {
- write_sx_byte(board, SI2_EISA_OFF, SI2_EISA_VAL);
- outb((board->irq<<4)|4, board->eisa_base+0xc02);
- } else if (IS_SI1_BOARD(board)) {
- write_sx_byte (board, SI1_ISA_RESET_CLEAR, 0);
- write_sx_byte (board, SI1_ISA_INTCL, 0);
- } 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... */
- static 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 if (IS_EISA_BOARD(board)) {
- inb(board->eisa_base+0xc03);
- } else if (IS_SI1_BOARD(board)) {
- write_sx_byte (board, SI1_ISA_INTCL,0);
- write_sx_byte (board, SI1_ISA_INTCL_CLEAR,0);
- } 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;
- }
- static 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);
- }
- static 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";
- }
- }
- static 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";
- }
- }
- static int mod_compat_type (int module_type)
- {
- return module_type >> 4;
- }
- static void sx_reconfigure_port(struct sx_port *port)
- {
- 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));
- }
- }
- 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/%dn", 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/%02xn",
- (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 int sx_set_real_termios (void *ptr)
- {
- struct sx_port *port = ptr;
- func_enter2();
- if (!port->gs.tty)
- return 0;
- /* 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: %dn", 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_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));
- sx_reconfigure_port(port);
- /* 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 ();
- return 0;
- }
- /* ********************************************************************** *
- * 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. */
- static 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 charsn",
- 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(%ld) 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) && port->gs.tty) {
- 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 */
- static 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 %lxn", 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 */
- static 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);
- gs_got_break (&port->gs);
- }
- 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 %dn", 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) &&
- !(port->gs.tty->termios->c_cflag & CLOCAL) ) {
- /* Are we blocking in open?*/
- sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD active, unblocking openn");
- 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)) &&
- !(port->gs.tty->termios->c_cflag & CLOCAL) ) {
- 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 if (IS_EISA_BOARD(board)) {
- inb(board->eisa_base+0xc03);
- write_sx_word(board, 8, 0);
- } 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);
- init_timer(&board->timer);
- 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);
- sx_reconfigure_port(port);
- }
- func_exit();
- }
- /* ********************************************************************** *
- * Here are the routines that actually *
- * interface with the rest of the system *
- * ********************************************************************** */
- 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 = %dn", port, port->c_dcd);
- tty->driver_data = port;
- port->gs.tty = tty;
- if (!port->gs.count)
- MOD_INC_USE_COUNT;
- port->gs.count++;
- sx_dprintk (SX_DEBUG_OPEN, "starting portn");
- /*
- * Start up serial port
- */
- retval = gs_init_port(&port->gs);
- sx_dprintk (SX_DEBUG_OPEN, "done gs_initn");
- if (retval) {
- port->gs.count--;
- if (port->gs.count) MOD_DEC_USE_COUNT;
- return retval;
- }
- port->gs.flags |= GS_ACTIVE;
- sx_setsignals (port, 1,1);
- #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");
- port->gs.count--;
- if (!port->gs.count) MOD_DEC_USE_COUNT;
- return -EIO;
- }
- retval = gs_block_til_ready(port, filp);
- sx_dprintk (SX_DEBUG_OPEN, "Block til ready returned %d. Count=%dn",
- retval, port->gs.count);
- if (retval) {
- /*
- * Don't lower gs.count here because sx_close() will be called later
- */
- 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=%dn", 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)
- {
- /*
- struct sx_port *port = ptr;
- */
- func_enter ();
- /* Don't force the SX card to close. mgetty doesn't like it !!!!!! -- pvdl */
- /* For some reson we added this code. Don't know why anymore ;-( -- pvdl */
- /*
- sx_setsignals (port, 0, 0);
- sx_reconfigure_port(port);
- sx_send_command (port, HS_CLOSE, 0, 0);
- 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 reactn");
- } else
- sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.n");
- }
- */
- 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_setsignals (port, 0, 0);
- sx_reconfigure_port(port);
- 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 reactn");
- } else
- sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.n");
- }
- sx_dprintk (SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%dn",
- 5 * HZ - to - 1, port->gs.count);
- if(port->gs.count) {
- sx_dprintk(SX_DEBUG_CLOSE, "WARNING port count:%dn", port->gs.count);
- port->gs.count = 0;
- }
- 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. */
- static 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
- #if 0
- /* This memtest takes a human-noticable time. You normally only do it
- once a boot, so I guess that it is worth it. */
- static 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;
- }
- #endif
- 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;
- unsigned long 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 (!capable(CAP_SYS_ADMIN)) {
- return -EPERM;
- }
- #endif
- sx_dprintk (SX_DEBUG_FIRMWARE, "IOCTL %x: %lxn", 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 %ldn", arg);
- if (arg > SX_NBOARDS) return -EIO;
- sx_dprintk (SX_DEBUG_FIRMWARE, "not out of rangen");
- 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 = -ENOENT; /* If we manage to miss one, return error. */
- if (IS_SX_BOARD (board)) rc = SX_TYPE_SX;
- if (IS_CF_BOARD (board)) rc = SX_TYPE_CF;
- if (IS_SI_BOARD (board)) rc = SX_TYPE_SI;
- if (IS_SI1_BOARD (board)) rc = SX_TYPE_SI;
- if (IS_EISA_BOARD (board)) rc = SX_TYPE_SI;
- sx_dprintk (SX_DEBUG_FIRMWARE, "returning type= %dn", 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= %dn", 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) {
- if (copy_from_user(tmp, (char *)data + i,
- (i + SX_CHUNK_SIZE >
- nbytes) ? nbytes - i :
- SX_CHUNK_SIZE))
- return -EFAULT;
- memcpy_toio ((char *) (board->base2 + 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 portsn",
- 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_GETGSDEBUG:
- case SXIO_SETGSDEBUG:
- rc = -EINVAL;
- break;
- case SXIO_GETNPORTS:
- rc = sx_nports;
- break;
- default:
- printk (KERN_WARNING "Unknown ioctl on firmware device (%x).n", cmd);
- break;
- }
- func_exit ();
- return rc;
- }
- static void sx_break (struct tty_struct * tty, int flag)
- {
- struct sx_port *port = tty->driver_data;
- int rv;
- if (flag)
- rv = sx_send_command (port, HS_START, -1, HS_IDLE_BREAK);
- else
- rv = sx_send_command (port, HS_STOP, -1, HS_IDLE_OPEN);
- if (rv != 1) printk (KERN_ERR "sx: couldn't send break (%x).n",
- read_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat)));
- }
- 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)
- rc = 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));
- sx_reconfigure_port(port);
- }
- 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));
- sx_reconfigure_port(port);
- }
- 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));
- sx_reconfigure_port(port);
- }
- 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;
- if (read_sx_byte (board, 0))
- /* CF boards may need this. */
- write_sx_byte(board,0, 0);
- /* 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);
- udelay (10);
- 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 channelsn",
- 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 panelsn",
- 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: %xn",
- 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_EISA_BOARD(board) ||
- 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;
- }
- static void printheader(void)
- {
- static int header_printed;
- if (!header_printed) {
- printk (KERN_INFO "Specialix SX driver "
- "(C) 1998/1999 R.E.Wolff@BitWizard.nl n");
- printk (KERN_INFO "sx: version %sn", RCS_ID);
- header_printed = 1;
- }
- }
- static int probe_sx (struct sx_board *board)
- {
- struct vpd_prom vpdp;
- char *p;
- int i;
- func_enter();
- if (!IS_CF_BOARD (board)) {
- sx_dprintk (SX_DEBUG_PROBE, "Going to verify vpd prom at %lx.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 ();
- if (!IS_CF_BOARD (board)) {
- printk (KERN_DEBUG "sx: Found an SX board at %lxn", 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/%dn",
- 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 %lx.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 . */
- static int probe_si (struct sx_board *board)
- {
- int i;
- func_enter();
- sx_dprintk (SX_DEBUG_PROBE, "Going to verify SI signature hw %lx at %lx.n", board->hw_base,
- board->base + SI2_ISA_ID_BASE);
- if (sx_debug & SX_DEBUG_PROBE)
- my_hd ((char *)(board->base + SI2_ISA_ID_BASE), 0x8);
- if (!IS_EISA_BOARD(board) ) {
- if( IS_SI1_BOARD(board) )
- {
- for (i=0;i<8;i++) {
- write_sx_byte (board, SI2_ISA_ID_BASE+7-i,i);
- }
- }
- for (i=0;i<8;i++) {
- if ((read_sx_byte (board, SI2_ISA_ID_BASE+7-i) & 7) != i) {
- return 0;
- }
- }
- }
- /* Now we're pretty much convinced that there is an SI board here,
- but to prevent trouble, we'd better double check that we don't
- have an SI1 board when we're probing for an SI2 board.... */
- write_sx_byte (board, SI2_ISA_ID_BASE,0x10);
- if ( IS_SI1_BOARD(board)) {
- /* This should be an SI1 board, which has this
- location writable... */
- if (read_sx_byte (board, SI2_ISA_ID_BASE) != 0x10)
- return 0;
- } else {
- /* This should be an SI2 board, which has the bottom
- 3 bits non-writable... */
- if (read_sx_byte (board, SI2_ISA_ID_BASE) == 0x10)
- return 0;
- }
- printheader ();
- printk (KERN_DEBUG "sx: Found an SI board at %lxn", 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.break_ctl = sx_break;
- 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 = %dn",
- 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 = %dn",
- error);
- return 1;
- }
- func_exit();
- return 0;
- }
- static 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 %dn", 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
- /*
- * Initializing wait queue
- */
- init_waitqueue_head(&port->gs.open_wait);
- init_waitqueue_head(&port->gs.close_wait);
-
- 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 channelsn", 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 channelsn", 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 __exit 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 */
- static void fix_sx_pci (PDEV, struct sx_board *board)
- {
- unsigned int hwbase;
- unsigned long rebase;
- unsigned int t;
- #define CNTRL_REG_OFFSET 0x50
- #define CNTRL_REG_GOODVALUE 0x18260000
- pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase);
- hwbase &= PCI_BASE_ADDRESS_MEM_MASK;
- rebase = (ulong) ioremap(hwbase, 0x80);
- t = readl (rebase + CNTRL_REG_OFFSET);
- if (t != CNTRL_REG_GOODVALUE) {
- printk (KERN_DEBUG "sx: performing cntrl reg fix: %08x -> %08xn", t, CNTRL_REG_GOODVALUE);
- writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET);
- }
- my_iounmap (hwbase, rebase);
- }
- #endif
- static int __init sx_init(void)
- {
- int i;
- int found = 0;
- int eisa_slot;
- 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))) {
- if (pci_enable_device(pdev))
- continue;
- #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) && (tshort != 0x0300)) {
- sx_dprintk (SX_DEBUG_PROBE, "But it's not an SX card (%d)...n",
- tshort);
- continue;
- }
- board = &boards[found];
- board->flags &= ~SX_BOARD_TYPE;
- board->flags |= (tshort == 0x200)?SX_PCI_BOARD:
- SX_CFPCI_BOARD;
- /* CF boards use base address 3.... */
- if (IS_CF_BOARD (board))
- board->hw_base = pci_resource_start (pdev, 3);
- else
- board->hw_base = pci_resource_start (pdev, 2);
- board->base2 =
- board->base = (ulong) ioremap(board->hw_base, WINDOW_LEN (board));
- if (!board->base) {
- printk(KERN_ERR "ioremap failedn");
- /* XXX handle error */
- }
- /* Most of the stuff on the CF board is offset by
- 0x18000 .... */
- if (IS_CF_BOARD (board)) board->base += 0x18000;
- board->irq = get_irq (pdev);
- sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x/%lx(%d) %x.n",
- tint, boards[found].base, board->irq, board->flags);
- 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->base2 =
- 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->base2 =
- 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);
- }
- }
- for (i=0;i<NR_SI1_ADDRS;i++) {
- board = &boards[found];
- board->hw_base = si1_probe_addrs[i];
- board->base2 =
- board->base = (ulong) ioremap(board->hw_base, SI1_ISA_WINDOW_LEN);
- board->flags &= ~SX_BOARD_TYPE;
- board->flags |= SI1_ISA_BOARD;
- board->irq = sx_irqmask ?-1:0;
- if (probe_si (board)) {
- found++;
- } else {
- my_iounmap (board->hw_base, board->base);
- }
- }
- sx_dprintk(SX_DEBUG_PROBE, "Probing for EISA cardsn");
- for(eisa_slot=0x1000; eisa_slot<0x10000; eisa_slot+=0x1000)
- {
- if((inb(eisa_slot+0xc80)==0x4d) &&
- (inb(eisa_slot+0xc81)==0x98))
- {
- sx_dprintk(SX_DEBUG_PROBE, "%s : Signature found in EISA slot %d, Product %d Rev %dn",
- "XIO", (eisa_slot>>12), inb(eisa_slot+0xc82), inb(eisa_slot+0xc83));
- board = &boards[found];
- board->eisa_base = eisa_slot;
- board->flags &= ~SX_BOARD_TYPE;
- board->flags |= SI_EISA_BOARD;
- board->hw_base = (((inb(0xc01+eisa_slot) << 8) + inb(0xc00+eisa_slot)) << 16);
- board->base2 =
- board->base = (ulong) ioremap(board->hw_base, SI2_EISA_WINDOW_LEN);
- sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lxn", board->hw_base);
- sx_dprintk(SX_DEBUG_PROBE, "base: %lxn", board->base);
- board->irq = inb(board->eisa_base+0xc02)>>4;
- sx_dprintk(SX_DEBUG_PROBE, "IRQ: %dn", board->irq);
-
- probe_si(board);
- found++;
- }
- }
- 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;
- }
- static void __exit sx_exit (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 %lxn", 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 devicen");
- }
- 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();
- }
- module_init(sx_init);
- module_exit(sx_exit);