diff options
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 0000000..3ad758a --- /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 = (sx_read_channel_byte (port, hi_rxipos) - rx_op) & 0xff; + + sx_dprintk (SX_DEBUG_RECEIVE, "rxop=%d, c = %d.\n", rx_op, c); + + /* Don't copy more bytes than there is room for in the buffer */ + if (tty->flip.count + c > TTY_FLIPBUF_SIZE) + c = TTY_FLIPBUF_SIZE - tty->flip.count; + + sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c); + + /* Don't copy past the end of the hardware receive buffer */ + if (rx_op + c > 0x100) c = 0x100 - rx_op; + + sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c); + + /* If for one reason or another, we can't copy more data, we're done! */ + if (c == 0) break; + + sx_dprintk (SX_DEBUG_RECEIVE , "Copying over %d chars. First is %d at %lx\n", c, + read_sx_byte (port->board, CHAN_OFFSET(port,hi_rxbuf) + rx_op), + CHAN_OFFSET(port, hi_rxbuf)); + memcpy_fromio (tty->flip.char_buf_ptr, + port->board->base + CHAN_OFFSET(port,hi_rxbuf) + rx_op, c); + memset(tty->flip.flag_buf_ptr, TTY_NORMAL, c); + + /* Update the kernel buffer end */ + tty->flip.count += c; + tty->flip.char_buf_ptr += c; + tty->flip.flag_buf_ptr += c; + + /* This one last. ( Not essential.) + It allows the card to start putting more data into the buffer! + Update the pointer in the card */ + sx_write_channel_byte (port, hi_rxopos, (rx_op + c) & 0xff); + + copied += c; + } + if (copied) { + struct timeval tv; + + do_gettimeofday (&tv); + sx_dprintk (SX_DEBUG_RECEIVE, + "pushing flipq port %d (%3d chars): %d.%06d (%d/%d)\n", + port->line, copied, + (int) (tv.tv_sec % 60), (int)tv.tv_usec, tty->raw, tty->real_raw); + + /* Tell the rest of the system the news. Great news. New characters! */ + tty_flip_buffer_push (tty); + /* tty_schedule_flip (tty); */ + } + + func_exit (); +} + +/* Inlined: it is called only once. Remove the inline if you add another + call */ +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 %d\n", c_dcd); + if (c_dcd != port->c_dcd) { + port->c_dcd = c_dcd; + if (sx_get_CD (port)) { + /* DCD went UP */ + if ((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 open\n"); + wake_up_interruptible(&port->gs.open_wait); + } else { + sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD raised. Ignoring.\n"); + } + } else { + /* DCD went down! */ + if (!(port->gs.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 irqreturn_t 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 won't + 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 IRQ_HANDLED; + if (!(board->flags & SX_BOARD_INITIALIZED)) + return IRQ_HANDLED; + + if (test_and_set_bit (SX_BOARD_INTR_LOCK, &board->locks)) { + printk (KERN_ERR "Recursive interrupt! (%d)\n", board->irq); + return IRQ_HANDLED; + } + + 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 (); + return IRQ_HANDLED; +} + + +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; + unsigned long flags; + + func_enter(); + + if (!sx_initialized) { + return -EIO; + } + + line = tty->index; + sx_dprintk (SX_DEBUG_OPEN, "%d: opening line %d. tty=%p ctty=%p, np=%d)\n", + current->pid, line, tty, current->signal->tty, sx_nports); + + if ((line < 0) || (line >= SX_NPORTS) || (line >= sx_nports)) + return -ENODEV; + + port = & sx_ports[line]; + port->c_dcd = 0; /* Make sure that the first interrupt doesn't detect a + 1 -> 0 transition. */ + + + sx_dprintk (SX_DEBUG_OPEN, "port = %p c_dcd = %d\n", port, port->c_dcd); + + spin_lock_irqsave(&port->gs.driver_lock, flags); + + tty->driver_data = port; + port->gs.tty = tty; + port->gs.count++; + spin_unlock_irqrestore(&port->gs.driver_lock, flags); + + sx_dprintk (SX_DEBUG_OPEN, "starting port\n"); + + /* + * Start up serial port + */ + retval = gs_init_port(&port->gs); + sx_dprintk (SX_DEBUG_OPEN, "done gs_init\n"); + if (retval) { + port->gs.count--; + return retval; + } + + port->gs.flags |= GS_ACTIVE; + if (port->gs.count <= 1) + sx_setsignals (port, 1,1); + +#if 0 + if (sx_debug & SX_DEBUG_OPEN) + my_hd (port, sizeof (*port)); +#else + if (sx_debug & SX_DEBUG_OPEN) + my_hd_io (port->board->base + port->ch_base, sizeof (*port)); +#endif + + if (port->gs.count <= 1) { + if (sx_send_command (port, HS_LOPEN, -1, HS_IDLE_OPEN) != 1) { + printk (KERN_ERR "sx: Card didn't respond to LOPEN command.\n"); + spin_lock_irqsave(&port->gs.driver_lock, flags); + port->gs.count--; + spin_unlock_irqrestore(&port->gs.driver_lock, flags); + return -EIO; + } + } + + retval = gs_block_til_ready(port, filp); + sx_dprintk (SX_DEBUG_OPEN, "Block til ready returned %d. Count=%d\n", + 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; */ + + port->c_dcd = sx_get_CD (port); + sx_dprintk (SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd); + + func_exit(); + return 0; + +} + + +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)) + if (msleep_interruptible(10)) + break; + if (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED) { + if (sx_send_command (port, HS_FORCE_CLOSED, -1, HS_IDLE_CLOSED) != 1) { + printk (KERN_ERR + "sx: sent the force_close command, but card didn't react\n"); + } else + sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.\n"); + } + + sx_dprintk (SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%d\n", + 5 * HZ - to - 1, port->gs.count); + + if(port->gs.count) { + sx_dprintk(SX_DEBUG_CLOSE, "WARNING port count:%d\n", port->gs.count); + //printk ("%s SETTING port count to zero: %p count: %d\n", __FUNCTION__, port, port->gs.count); + //port->gs.count = 0; + } + + 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 __user *descr = (int __user *)arg; + int 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: %lx\n", cmd, arg); + + if (!board) board = &boards[0]; + if (board->flags & SX_BOARD_PRESENT) { + sx_dprintk (SX_DEBUG_FIRMWARE, "Board present! (%x)\n", + board->flags); + } else { + sx_dprintk (SX_DEBUG_FIRMWARE, "Board not present! (%x) all:", + board->flags); + for (i=0;i< SX_NBOARDS;i++) + sx_dprintk (SX_DEBUG_FIRMWARE, "<%x> ", boards[i].flags); + sx_dprintk (SX_DEBUG_FIRMWARE, "\n"); + return -EIO; + } + + switch (cmd) { + case SXIO_SET_BOARD: + sx_dprintk (SX_DEBUG_FIRMWARE, "set board to %ld\n", arg); + if (arg >= SX_NBOARDS) return -EIO; + sx_dprintk (SX_DEBUG_FIRMWARE, "not out of range\n"); + if (!(boards[arg].flags & SX_BOARD_PRESENT)) return -EIO; + sx_dprintk (SX_DEBUG_FIRMWARE, ".. and present!\n"); + board = &boards[arg]; + break; + case SXIO_GET_TYPE: + rc = -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= %d\n", rc); + break; + case SXIO_DO_RAMTEST: + if (sx_initialized) /* Already initialized: better not ramtest the board. */ + return -EPERM; + if (IS_SX_BOARD (board)) { + rc = do_memtest (board, 0, 0x7000); + if (!rc) rc = do_memtest (board, 0, 0x7000); + /*if (!rc) rc = do_memtest_w (board, 0, 0x7000);*/ + } else { + rc = do_memtest (board, 0, 0x7ff8); + /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */ + } + sx_dprintk (SX_DEBUG_FIRMWARE, "returning memtest result= %d\n", rc); + break; + case SXIO_DOWNLOAD: + if (sx_initialized) /* Already initialized */ + return -EEXIST; + if (!sx_reset (board)) + return -EIO; + sx_dprintk (SX_DEBUG_INIT, "reset the board...\n"); + + tmp = kmalloc (SX_CHUNK_SIZE, GFP_USER); + if (!tmp) return -ENOMEM; + get_user (nbytes, descr++); + get_user (offset, descr++); + get_user (data, descr++); + while (nbytes && data) { + for (i=0;i<nbytes;i += SX_CHUNK_SIZE) { + if (copy_from_user(tmp, (char __user *)data+i, + (i + SX_CHUNK_SIZE > + nbytes) ? nbytes - i : + SX_CHUNK_SIZE)) { + kfree (tmp); + return -EFAULT; + } + memcpy_toio(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 ports\n", + i, sx_nports, boards[0].nports); + rc = sx_init_portstructs (i, sx_nports); + sx_init_drivers (); + if (rc >= 0) + sx_initialized++; + break; + case SXIO_SETDEBUG: + sx_debug = arg; + break; + case SXIO_GETDEBUG: + rc = sx_debug; + break; + case SXIO_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; + + func_enter (); + + 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))); + + func_exit (); +} + + +static int sx_tiocmget(struct tty_struct *tty, struct file *file) +{ + struct sx_port *port = tty->driver_data; + return sx_getsignals(port); +} + +static int sx_tiocmset(struct tty_struct *tty, struct file *file, + unsigned int set, unsigned int clear) +{ + struct sx_port *port = tty->driver_data; + int rts = -1, dtr = -1; + + if (set & TIOCM_RTS) + rts = 1; + if (set & TIOCM_DTR) + dtr = 1; + if (clear & TIOCM_RTS) + rts = 0; + if (clear & TIOCM_DTR) + dtr = 0; + + sx_setsignals(port, dtr, rts); + sx_reconfigure_port(port); + return 0; +} + +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; + void __user *argp = (void __user *)arg; + int ival; + + /* func_enter2(); */ + + rc = 0; + switch (cmd) { + case TIOCGSOFTCAR: + rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), + (unsigned __user *) argp); + break; + case TIOCSSOFTCAR: + if ((rc = get_user(ival, (unsigned __user *) argp)) == 0) { + tty->termios->c_cflag = + (tty->termios->c_cflag & ~CLOCAL) | + (ival ? CLOCAL : 0); + } + break; + case TIOCGSERIAL: + rc = gs_getserial(&port->gs, argp); + break; + case TIOCSSERIAL: + rc = gs_setserial(&port->gs, argp); + 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_io (board->base, 0x10); + sx_dprintk (SX_DEBUG_INIT, "the first sx_module structure:\n"); + if (sx_debug & SX_DEBUG_INIT) my_hd_io (board->base + 0x80, 0x30); + + sx_dprintk (SX_DEBUG_INIT, + "init_status: %x, %dk memory, firmware V%x.%02x,\n", + read_sx_byte (board, 0), read_sx_byte(board, 1), + read_sx_byte (board, 5), read_sx_byte(board, 4)); + + if (read_sx_byte (board, 0) == 0xff) { + printk (KERN_INFO "sx: No modules found. Sorry.\n"); + board->nports = 0; + return 0; + } + + chans = 0; + + if (IS_SX_BOARD(board)) { + sx_write_board_word (board, cc_int_count, sx_maxints); + } else { + if (sx_maxints) + sx_write_board_word (board, cc_int_count, SI_PROCESSOR_CLOCK/8/sx_maxints); + } + + /* grab the first module type... */ + /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */ + board->ta_type = mod_compat_type (sx_read_module_byte (board, 0x80, mc_chip)); + + /* XXX byteorder */ + for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) { + type = sx_read_module_byte (board, addr, mc_chip); + sx_dprintk (SX_DEBUG_INIT, "Module at %x: %d channels\n", + addr, read_sx_byte (board, addr + 2)); + + chans += sx_read_module_byte (board, addr, mc_type); + + sx_dprintk (SX_DEBUG_INIT, "module is an %s, which has %s/%s panels\n", + mod_type_s (type), + pan_type_s (sx_read_module_byte (board, addr, mc_mods) & 0xf), + pan_type_s (sx_read_module_byte (board, addr, mc_mods) >> 4)); + + sx_dprintk (SX_DEBUG_INIT, "CD1400 versions: %x/%x, ASIC version: %x\n", + sx_read_module_byte (board, addr, mc_rev1), + sx_read_module_byte (board, addr, mc_rev2), + sx_read_module_byte (board, addr, mc_mtaasic_rev)); + + /* The following combinations are illegal: It should theoretically + work, but timing problems make the bus HANG. */ + + if (mod_compat_type (type) != board->ta_type) { + printk (KERN_ERR "sx: This is an invalid configuration.\n" + "Don't mix TA/MTA/SXDC on the same hostadapter.\n"); + chans=0; + break; + } + if ((IS_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 %s\n", 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 %p.\n", + board->base + SX_VPD_ROM); + + if (sx_debug & SX_DEBUG_PROBE) + my_hd_io(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 (&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 %lx\n", board->hw_base); + printk (KERN_DEBUG "sx: hw_rev: %d, assembly level: %d, uniq ID:%08x, ", + vpdp.hwrev, vpdp.hwass, vpdp.uniqid); + printk ( "Manufactured: %d/%d\n", + 1970 + vpdp.myear, vpdp.mweek); + + + if ((((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_PCI_UNIQUEID1) && + (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_ISA_UNIQUEID1)) { + /* This might be a bit harsh. This was the primary reason the + SX/ISA card didn't work at first... */ + printk (KERN_ERR "sx: Hmm. Not an SX/PCI or SX/ISA card. Sorry: giving up.\n"); + return (0); + } + + if (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) == SX_ISA_UNIQUEID1) { + if (((unsigned long)board->hw_base) & 0x8000) { + printk (KERN_WARNING "sx: Warning: There may be hardware problems with the card at %lx.\n", board->hw_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 %p.\n", board->hw_base, + board->base + SI2_ISA_ID_BASE); + + if (sx_debug & SX_DEBUG_PROBE) + my_hd_io(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) { + func_exit (); + 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) + func_exit (); + 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) + func_exit (); + 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) + func_exit(); + 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) + func_exit (); + return 0; + } + + printheader (); + + printk (KERN_DEBUG "sx: Found an SI board at %lx\n", board->hw_base); + /* Compared to the SX boards, it is a complete guess as to what + this card is up to... */ + + board->nports = -1; + + /* This resets the processor, and keeps it off the bus. */ + if (!sx_reset (board)) + return 0; + sx_dprintk (SX_DEBUG_INIT, "reset the board...\n"); + + board->flags |= SX_BOARD_PRESENT; + + func_exit(); + return 1; +} + +static struct tty_operations sx_ops = { + .break_ctl = sx_break, + .open = sx_open, + .close = gs_close, + .write = gs_write, + .put_char = gs_put_char, + .flush_chars = gs_flush_chars, + .write_room = gs_write_room, + .chars_in_buffer = gs_chars_in_buffer, + .flush_buffer = gs_flush_buffer, + .ioctl = sx_ioctl, + .throttle = sx_throttle, + .unthrottle = sx_unthrottle, + .set_termios = gs_set_termios, + .stop = gs_stop, + .start = gs_start, + .hangup = gs_hangup, + .tiocmget = sx_tiocmget, + .tiocmset = sx_tiocmset, +}; + +static int sx_init_drivers(void) +{ + int error; + + func_enter(); + + sx_driver = alloc_tty_driver(sx_nports); + if (!sx_driver) + return 1; + sx_driver->owner = THIS_MODULE; + sx_driver->driver_name = "specialix_sx"; + sx_driver->name = "ttyX"; + sx_driver->major = SX_NORMAL_MAJOR; + sx_driver->type = TTY_DRIVER_TYPE_SERIAL; + sx_driver->subtype = SERIAL_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; + tty_set_operations(sx_driver, &sx_ops); + + if ((error = tty_register_driver(sx_driver))) { + put_tty_driver(sx_driver); + printk(KERN_ERR "sx: Couldn't register sx driver, error = %d\n", + 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; + + port = sx_ports; + for (i = 0; i < nboards; i++) { + board = &boards[i]; + board->ports = port; + for (j=0; j < boards[i].nports;j++) { + sx_dprintk (SX_DEBUG_INIT, "initing port %d\n", j); + port->gs.magic = SX_MAGIC; + port->gs.close_delay = HZ/2; + port->gs.closing_wait = 30 * HZ; + port->board = board; + port->gs.rd = &sx_real_driver; +#ifdef NEW_WRITE_LOCKING + port->gs.port_write_sem = MUTEX; +#endif + port->gs.driver_lock = SPIN_LOCK_UNLOCKED; + /* + * 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 channels\n", board->nports); + if (board->nports <= 0) continue; + /* XXX byteorder ?? */ + for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) { + chans = sx_read_module_byte (board, addr, mc_type); + sx_dprintk (SX_DEBUG_PROBE, "Module at %x: %d channels\n", addr, chans); + sx_dprintk (SX_DEBUG_PROBE, "Port at"); + for (j=0;j<chans;j++) { + /* The "sx-way" is the way it SHOULD be done. That way in the + future, the firmware may for example pack the structures a bit + more efficient. Neil tells me it isn't going to happen anytime + soon though. */ + if (IS_SX_BOARD(board)) + port->ch_base = sx_read_module_word (board, addr+j*2, mc_chan_pointer); + else + port->ch_base = addr + 0x100 + 0x300*j; + + sx_dprintk (SX_DEBUG_PROBE, " %x", port->ch_base); + port->line = portno++; + port++; + } + sx_dprintk (SX_DEBUG_PROBE, "\n"); + } + /* This has to be done earlier. */ + /* board->flags |= SX_BOARD_INITIALIZED; */ + } + + func_exit(); + return 0; +} + +static void __exit sx_release_drivers(void) +{ + func_enter(); + tty_unregister_driver(sx_driver); + put_tty_driver(sx_driver); + func_exit(); +} + +#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 (struct pci_dev *pdev, struct sx_board *board) +{ + unsigned int hwbase; + void __iomem *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 = ioremap(hwbase, 0x80); + t = readl (rebase + CNTRL_REG_OFFSET); + if (t != CNTRL_REG_GOODVALUE) { + printk (KERN_DEBUG "sx: performing cntrl reg fix: %08x -> %08x\n", t, CNTRL_REG_GOODVALUE); + writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET); + } + iounmap(rebase); +} +#endif + + +static int __init sx_init(void) +{ + int i; + int found = 0; + int eisa_slot; + struct sx_board *board; + +#ifdef CONFIG_PCI + struct pci_dev *pdev = NULL; + 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; + } + + if (misc_register(&sx_fw_device) < 0) { + printk(KERN_ERR "SX: Unable to register firmware loader driver.\n"); + return -EIO; + } + +#ifdef CONFIG_PCI + while ((pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, + PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, + pdev))) { + if (pci_enable_device(pdev)) + continue; + + /* 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 = ioremap(board->hw_base, WINDOW_LEN (board)); + if (!board->base) { + printk(KERN_ERR "ioremap failed\n"); + /* 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 = pdev->irq; + + sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x/%p(%d) %x.\n", + tint, boards[found].base, board->irq, board->flags); + + if (probe_sx (board)) { + found++; + fix_sx_pci (pdev, board); + } else + iounmap(board->base2); + } +#endif + + for (i=0;i<NR_SX_ADDRS;i++) { + board = &boards[found]; + board->hw_base = sx_probe_addrs[i]; + board->base2 = + board->base = 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 { + iounmap(board->base); + } + } + + for (i=0;i<NR_SI_ADDRS;i++) { + board = &boards[found]; + board->hw_base = si_probe_addrs[i]; + board->base2 = + board->base = 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 { + iounmap (board->base); + } + } + for (i=0;i<NR_SI1_ADDRS;i++) { + board = &boards[found]; + board->hw_base = si1_probe_addrs[i]; + board->base2 = + board->base = 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 { + iounmap (board->base); + } + } + + sx_dprintk(SX_DEBUG_PROBE, "Probing for EISA cards\n"); + 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 %d\n", + "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 = ioremap(board->hw_base, SI2_EISA_WINDOW_LEN); + + sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lx\n", board->hw_base); + sx_dprintk(SX_DEBUG_PROBE, "base: %p\n", board->base); + board->irq = inb(board->eisa_base+0xc02)>>4; + sx_dprintk(SX_DEBUG_PROBE, "IRQ: %d\n", board->irq); + + probe_si(board); + + found++; + } + } + if (found) { + printk (KERN_INFO "sx: total of %d boards detected.\n", found); + } else { + misc_deregister(&sx_fw_device); + } + + 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 %p\n", board->base); + /* The board should stop messing with us. + (actually I mean the interrupt) */ + sx_reset (board); + if ((board->irq) && (board->flags & SX_IRQ_ALLOCATED)) + free_irq (board->irq, board); + + /* It is safe/allowed to del_timer a non-active timer */ + del_timer (& board->timer); + iounmap(board->base); + } + } + if (misc_deregister(&sx_fw_device) < 0) { + printk (KERN_INFO "sx: couldn't deregister firmware loader devic\n"); + } + sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up drivers (%d)\n", sx_initialized); + if (sx_initialized) + sx_release_drivers (); + + kfree (sx_ports); + func_exit(); +} + +module_init(sx_init); +module_exit(sx_exit); + + |
