diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/sx.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/sx.c')
-rw-r--r-- | drivers/char/sx.c | 2621 |
1 files changed, 2621 insertions, 0 deletions
diff --git a/drivers/char/sx.c b/drivers/char/sx.c new file mode 100644 index 000000000000..3ad758a9a1dc --- /dev/null +++ b/drivers/char/sx.c @@ -0,0 +1,2621 @@ + +/* sx.c -- driver for the Specialix SX series cards. + * + * This driver will also support the older SI, and XIO cards. + * + * + * (C) 1998 - 2004 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 <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/pci.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/miscdevice.h> +#include <linux/bitops.h> + +#include <asm/io.h> +#include <asm/uaccess.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/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. */ + +#ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 +#define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000 +#endif + +#ifdef CONFIG_PCI +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); +#endif /* CONFIG_PCI */ + +/* 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_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; + +static struct sx_board boards[SX_NBOARDS]; +static struct sx_port *sx_ports; +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_param_array(sx_probe_addrs, int, NULL, 0); +module_param_array(si_probe_addrs, int, NULL, 0); +module_param(sx_poll, int, 0); +module_param(sx_slowpoll, int, 0); +module_param(sx_maxints, int, 0); +module_param(sx_debug, int, 0); +module_param(sx_irqmask, int, 0); + +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, +}; + + +/* + 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 %s\n",__FUNCTION__) +#define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit %s\n", __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, + char *name, 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, name, routine); + return 1; + } + if (port->magic != SX_MAGIC) { + printk(badmagic, name, 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_io(void __iomem *p, int len) +{ + int i, j, ch; + unsigned char __iomem *addr = p; + + for (i=0;i<len;i+=16) { + printk ("%p ", addr+i); + for (j=0;j<16;j++) { + printk ("%02x %s", readb(addr+j+i), (j==7)?" ":""); + } + for (j=0;j<16;j++) { + ch = readb(addr+j+i); + printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch)); + } + printk ("\n"); + } +} +static void my_hd(void *p, int len) +{ + int i, j, ch; + unsigned char *addr = p; + + 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 ;i++) + if ((read_sx_byte (board, offset) & mask) == correctval) { + func_exit (); + return 1; + } + + for (i=0; i < TIMEOUT_2 ;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 ;i++) + if ((read_sx_byte (board, offset) & mask) != badval) { + func_exit (); + return 1; + } + + for (i=0; i < TIMEOUT_2 ;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/%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 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: %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_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 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(%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) { + tty_wakeup(port->gs.tty); + sx_dprintk (SX_DEBUG_TRANSMIT, "Waking up.... ldisc (%d)....\n", + port->gs.wakeup_chars); + } + + 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 = |