diff options
Diffstat (limited to 'drivers/char/rio/rio_linux.c')
| -rw-r--r-- | drivers/char/rio/rio_linux.c | 1380 |
1 files changed, 1380 insertions, 0 deletions
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c new file mode 100644 index 00000000000..a91ae271cf0 --- /dev/null +++ b/drivers/char/rio/rio_linux.c @@ -0,0 +1,1380 @@ + +/* rio_linux.c -- Linux driver for the Specialix RIO series cards. + * + * + * (C) 1999 R.E.Wolff@BitWizard.nl + * + * 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 (rio.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: rio.c,v $ + * Revision 1.1 1999/07/11 10:13:54 wolff + * Initial revision + * + * */ + +#include <linux/module.h> +#include <linux/config.h> +#include <linux/kdev_t.h> +#include <asm/io.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/mm.h> +#include <linux/serial.h> +#include <linux/fcntl.h> +#include <linux/major.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <linux/slab.h> +#include <linux/miscdevice.h> +#include <linux/init.h> + +#include <linux/generic_serial.h> +#include <asm/uaccess.h> + +#if BITS_PER_LONG != 32 +# error FIXME: this driver only works on 32-bit platforms +#endif + +#include "linux_compat.h" +#include "typdef.h" +#include "pkt.h" +#include "daemon.h" +#include "rio.h" +#include "riospace.h" +#include "top.h" +#include "cmdpkt.h" +#include "map.h" +#include "riotypes.h" +#include "rup.h" +#include "port.h" +#include "riodrvr.h" +#include "rioinfo.h" +#include "func.h" +#include "errors.h" +#include "pci.h" + +#include "parmmap.h" +#include "unixrup.h" +#include "board.h" +#include "host.h" +#include "error.h" +#include "phb.h" +#include "link.h" +#include "cmdblk.h" +#include "route.h" +#include "control.h" +#include "cirrus.h" +#include "rioioctl.h" +#include "param.h" +#include "list.h" +#include "sam.h" +#include "protsts.h" +#include "rioboard.h" + + +#include "rio_linux.h" + +/* I don't think that this driver can handle more than 512 ports on +one machine. Specialix specifies max 4 boards in one machine. I don't +know why. If you want to try anyway you'll have to increase the number +of boards in rio.h. You'll have to allocate more majors if you need +more than 512 ports.... */ + +#ifndef RIO_NORMAL_MAJOR0 +/* This allows overriding on the compiler commandline, or in a "major.h" + include or something like that */ +#define RIO_NORMAL_MAJOR0 154 +#define RIO_NORMAL_MAJOR1 156 +#endif + +#ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 +#define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000 +#endif + +#ifndef RIO_WINDOW_LEN +#define RIO_WINDOW_LEN 0x10000 +#endif + + +/* Configurable options: + (Don't be too sure that it'll work if you toggle them) */ + +/* Am I paranoid or not ? ;-) */ +#undef RIO_PARANOIA_CHECK + + +/* 20 -> 2000 per second. The card should rate-limit interrupts at 1000 + 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. + undef this if you want to disable the check.... +*/ +#define IRQ_RATE_LIMIT 200 + +#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 RIO_REPORT_FIFO +#define RIO_REPORT_OVERRUN +#endif + + +/* These constants are derived from SCO Source */ +static struct Conf +RIOConf = +{ + /* locator */ "RIO Config here", + /* startuptime */ HZ*2, /* how long to wait for card to run */ + /* slowcook */ 0, /* TRUE -> always use line disc. */ + /* intrpolltime */ 1, /* The frequency of OUR polls */ + /* breakinterval */ 25, /* x10 mS XXX: units seem to be 1ms not 10! -- REW*/ + /* timer */ 10, /* mS */ + /* RtaLoadBase */ 0x7000, + /* HostLoadBase */ 0x7C00, + /* XpHz */ 5, /* number of Xprint hits per second */ + /* XpCps */ 120, /* Xprint characters per second */ + /* XpOn */ "\033d#", /* start Xprint for a wyse 60 */ + /* XpOff */ "\024", /* end Xprint for a wyse 60 */ + /* MaxXpCps */ 2000, /* highest Xprint speed */ + /* MinXpCps */ 10, /* slowest Xprint speed */ + /* SpinCmds */ 1, /* non-zero for mega fast boots */ + /* First Addr */ 0x0A0000, /* First address to look at */ + /* Last Addr */ 0xFF0000, /* Last address looked at */ + /* BufferSize */ 1024, /* Bytes per port of buffering */ + /* LowWater */ 256, /* how much data left before wakeup */ + /* LineLength */ 80, /* how wide is the console? */ + /* CmdTimeout */ HZ, /* how long a close command may take */ +}; + + + + +/* Function prototypes */ + +static void rio_disable_tx_interrupts (void * ptr); +static void rio_enable_tx_interrupts (void * ptr); +static void rio_disable_rx_interrupts (void * ptr); +static void rio_enable_rx_interrupts (void * ptr); +static int rio_get_CD (void * ptr); +static void rio_shutdown_port (void * ptr); +static int rio_set_real_termios (void *ptr); +static void rio_hungup (void *ptr); +static void rio_close (void *ptr); +static int rio_chars_in_buffer (void * ptr); +static int rio_fw_ioctl (struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg); +static int rio_init_drivers(void); + +static void my_hd (void *addr, int len); + +static struct tty_driver *rio_driver, *rio_driver2; + +/* The name "p" is a bit non-descript. But that's what the rio-lynxos +sources use all over the place. */ +struct rio_info *p; + +int rio_debug; + + +/* You can have the driver poll your card. + - Set rio_poll to 1 to poll every timer tick (10ms on Intel). + This is used when the card cannot use an interrupt for some reason. +*/ +static int rio_poll = 1; + + +/* These are the only open spaces in my computer. Yours may have more + or less.... */ +static int rio_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000}; + +#define NR_RIO_ADDRS (sizeof(rio_probe_addrs)/sizeof (int)) + + +/* Set the mask to all-ones. This alas, only supports 32 interrupts. + Some architectures may need more. -- Changed to LONG to + support up to 64 bits on 64bit architectures. -- REW 20/06/99 */ +long rio_irqmask = -1; + +MODULE_AUTHOR("Rogier Wolff <R.E.Wolff@bitwizard.nl>, Patrick van de Lageweg <patrick@bitwizard.nl>"); +MODULE_DESCRIPTION("RIO driver"); +MODULE_LICENSE("GPL"); +module_param(rio_poll, int, 0); +module_param(rio_debug, int, 0644); +module_param(rio_irqmask, long, 0); + +static struct real_driver rio_real_driver = { + rio_disable_tx_interrupts, + rio_enable_tx_interrupts, + rio_disable_rx_interrupts, + rio_enable_rx_interrupts, + rio_get_CD, + rio_shutdown_port, + rio_set_real_termios, + rio_chars_in_buffer, + rio_close, + rio_hungup, + NULL +}; + +/* + * Firmware loader driver specific routines + * + */ + +static struct file_operations rio_fw_fops = { + .owner = THIS_MODULE, + .ioctl = rio_fw_ioctl, +}; + +static struct miscdevice rio_fw_device = { + RIOCTL_MISC_MINOR, "rioctl", &rio_fw_fops +}; + + + + + +#ifdef RIO_PARANOIA_CHECK + +/* This doesn't work. Who's paranoid around here? Not me! */ + +static inline int rio_paranoia_check(struct rio_port const * port, + char *name, const char *routine) +{ + + static const char *badmagic = + KERN_ERR "rio: Warning: bad rio port magic number for device %s in %s\n"; + static const char *badinfo = + KERN_ERR "rio: Warning: null rio port for device %s in %s\n"; + + if (!port) { + printk (badinfo, name, routine); + return 1; + } + if (port->magic != RIO_MAGIC) { + printk (badmagic, name, routine); + return 1; + } + + return 0; +} +#else +#define rio_paranoia_check(a,b,c) 0 +#endif + + +#ifdef DEBUG +static void my_hd (void *ad, int len) +{ + int i, j, ch; + unsigned char *addr = ad; + + for (i=0;i<len;i+=16) { + rio_dprintk (RIO_DEBUG_PARAM, "%08x ", (int) addr+i); + for (j=0;j<16;j++) { + rio_dprintk (RIO_DEBUG_PARAM, "%02x %s", addr[j+i], (j==7)?" ":""); + } + for (j=0;j<16;j++) { + ch = addr[j+i]; + rio_dprintk (RIO_DEBUG_PARAM, "%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch)); + } + rio_dprintk (RIO_DEBUG_PARAM, "\n"); + } +} +#else +#define my_hd(ad,len) do{/* nothing*/ } while (0) +#endif + + +/* Delay a number of jiffies, allowing a signal to interrupt */ +int RIODelay (struct Port *PortP, int njiffies) +{ + func_enter (); + + rio_dprintk (RIO_DEBUG_DELAY, "delaying %d jiffies\n", njiffies); + msleep_interruptible(jiffies_to_msecs(njiffies)); + func_exit(); + + if (signal_pending(current)) + return RIO_FAIL; + else + return !RIO_FAIL; +} + + +/* Delay a number of jiffies, disallowing a signal to interrupt */ +int RIODelay_ni (struct Port *PortP, int njiffies) +{ + func_enter (); + + rio_dprintk (RIO_DEBUG_DELAY, "delaying %d jiffies (ni)\n", njiffies); + msleep(jiffies_to_msecs(njiffies)); + func_exit(); + return !RIO_FAIL; +} + + +int rio_minor(struct tty_struct *tty) +{ + return tty->index + (tty->driver == rio_driver) ? 0 : 256; +} + + +int rio_ismodem(struct tty_struct *tty) +{ + return 1; +} + + +void rio_udelay (int usecs) +{ + udelay (usecs); +} + +static int rio_set_real_termios (void *ptr) +{ + int rv, modem; + struct tty_struct *tty; + func_enter(); + + tty = ((struct Port *)ptr)->gs.tty; + + modem = rio_ismodem(tty); + + rv = RIOParam( (struct Port *) ptr, CONFIG, modem, 1); + + func_exit (); + + return rv; +} + + +static void rio_reset_interrupt (struct Host *HostP) +{ + func_enter(); + + switch( HostP->Type ) { + case RIO_AT: + case RIO_MCA: + case RIO_PCI: + WBYTE(HostP->ResetInt , 0xff); + } + + func_exit(); +} + + +static irqreturn_t rio_interrupt (int irq, void *ptr, struct pt_regs *regs) +{ + struct Host *HostP; + func_enter (); + + HostP = (struct Host*)ptr; /* &p->RIOHosts[(long)ptr]; */ + rio_dprintk (RIO_DEBUG_IFLOW, "rio: enter rio_interrupt (%d/%d)\n", + irq, HostP->Ivec); + + /* 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 (HostP->Ivec, ptr); + printk (KERN_ERR "rio: Too many interrupts. Turning off interrupt %d.\n", + HostP->Ivec); + } + } else { + lastjif = jiffies; + nintr = 0; + } + } +#endif + rio_dprintk (RIO_DEBUG_IFLOW, "rio: We've have noticed the interrupt\n"); + if (HostP->Ivec == irq) { + /* Tell the card we've noticed the interrupt. */ + rio_reset_interrupt (HostP); + } + + if ((HostP->Flags & RUN_STATE) != RC_RUNNING) + return IRQ_HANDLED; + + if (test_and_set_bit (RIO_BOARD_INTR_LOCK, &HostP->locks)) { + printk (KERN_ERR "Recursive interrupt! (host %d/irq%d)\n", + (int) ptr, HostP->Ivec); + return IRQ_HANDLED; + } + + RIOServiceHost(p, HostP, irq); + + rio_dprintk ( RIO_DEBUG_IFLOW, "riointr() doing host %d type %d\n", + (int) ptr, HostP->Type); + + clear_bit (RIO_BOARD_INTR_LOCK, &HostP->locks); + rio_dprintk (RIO_DEBUG_IFLOW, "rio: exit rio_interrupt (%d/%d)\n", + irq, HostP->Ivec); + func_exit (); + return IRQ_HANDLED; +} + + +static void rio_pollfunc (unsigned long data) +{ + func_enter (); + + rio_interrupt (0, &p->RIOHosts[data], NULL); + p->RIOHosts[data].timer.expires = jiffies + rio_poll; + add_timer (&p->RIOHosts[data].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 Specialix + cards. .... Hmm. Ok I figured it out. You don't. -- REW */ + +static void rio_disable_tx_interrupts (void * ptr) +{ + func_enter(); + + /* port->gs.flags &= ~GS_TX_INTEN; */ + + func_exit(); +} + + +static void rio_enable_tx_interrupts (void * ptr) +{ + struct Port *PortP = ptr; + /* int hn; */ + + func_enter(); + + /* hn = PortP->HostP - p->RIOHosts; + + rio_dprintk (RIO_DEBUG_TTY, "Pushing host %d\n", hn); + rio_interrupt (-1,(void *) hn, NULL); */ + + RIOTxEnable((char *) PortP); + + /* + * In general we cannot count on "tx empty" interrupts, although + * the interrupt routine seems to be able to tell the difference. + */ + PortP->gs.flags &= ~GS_TX_INTEN; + + func_exit(); +} + + +static void rio_disable_rx_interrupts (void * ptr) +{ + func_enter(); + func_exit(); +} + +static void rio_enable_rx_interrupts (void * ptr) +{ + /* struct rio_port *port = ptr; */ + func_enter(); + func_exit(); +} + + +/* Jeez. Isn't this simple? */ +static int rio_get_CD (void * ptr) +{ + struct Port *PortP = ptr; + int rv; + + func_enter(); + rv = (PortP->ModemState & MSVR1_CD) != 0; + + rio_dprintk (RIO_DEBUG_INIT, "Getting CD status: %d\n", rv); + + func_exit(); + return rv; +} + + +/* Jeez. Isn't this simple? Actually, we can sync with the actual port + by just pushing stuff into the queue going to the port... */ +static int rio_chars_in_buffer (void * ptr) +{ + func_enter(); + + func_exit(); + return 0; +} + + +/* Nothing special here... */ +static void rio_shutdown_port (void * ptr) +{ + struct Port *PortP; + + func_enter(); + + PortP = (struct Port *)ptr; + PortP->gs.tty = NULL; +#if 0 + port->gs.flags &= ~ GS_ACTIVE; + if (!port->gs.tty) { + rio_dprintk (RIO_DBUG_TTY, "No tty.\n"); + return; + } + if (!port->gs.tty->termios) { + rio_dprintk (RIO_DEBUG_TTY, "No termios.\n"); + return; + } + if (port->gs.tty->termios->c_cflag & HUPCL) { + rio_setsignals (port, 0, 0); + } +#endif + + func_exit(); +} + + +/* I haven't the foggiest why the decrement use count has to happen + here. The whole linux serial drivers stuff needs to be redesigned. + My guess is that this is a hack to minimize the impact of a bug + elsewhere. Thinking about it some more. (try it sometime) Try + running minicom on a serial port that is driven by a modularized + driver. Have the modem hangup. Then remove the driver module. Then + exit minicom. I expect an "oops". -- REW */ +static void rio_hungup (void *ptr) +{ + struct Port *PortP; + + func_enter(); + + PortP = (struct Port *)ptr; + PortP->gs.tty = NULL; + + func_exit (); +} + + +/* The standard serial_close would become shorter if you'd wrap it like + this. + rs_close (...){save_flags;cli;real_close();dec_use_count;restore_flags;} + */ +static void rio_close (void *ptr) +{ + struct Port *PortP; + + func_enter (); + + PortP = (struct Port *)ptr; + + riotclose (ptr); + + if(PortP->gs.count) { + printk (KERN_ERR "WARNING port count:%d\n", PortP->gs.count); + PortP->gs.count = 0; + } + + PortP->gs.tty = NULL; + func_exit (); +} + + + +static int rio_fw_ioctl (struct inode *inode, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + int rc = 0; + func_enter(); + + /* The "dev" argument isn't used. */ + rc = riocontrol (p, 0, cmd, (void *)arg, capable(CAP_SYS_ADMIN)); + + func_exit (); + return rc; +} + +extern int RIOShortCommand(struct rio_info *p, struct Port *PortP, + int command, int len, int arg); + +static int rio_ioctl (struct tty_struct * tty, struct file * filp, + unsigned int cmd, unsigned long arg) +{ + int rc; + struct Port *PortP; + int ival; + + func_enter(); + + PortP = (struct Port *)tty->driver_data; + + rc = 0; + switch (cmd) { +#if 0 + case TIOCGSOFTCAR: + rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), + (unsigned int *) arg); + break; +#endif + case TIOCSSOFTCAR: + if ((rc = get_user(ival, (unsigned int *) arg)) == 0) { + tty->termios->c_cflag = + (tty->termios->c_cflag & ~CLOCAL) | + (ival ? CLOCAL : 0); + } + break; + case TIOCGSERIAL: + rc = -EFAULT; + if (access_ok(VERIFY_WRITE, (void *) arg, + sizeof(struct serial_struct))) + rc = gs_getserial(&PortP->gs, (struct serial_struct *) arg); + break; + case TCSBRK: + if ( PortP->State & RIO_DELETED ) { + rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n"); + rc = -EIO; + } else { + if (RIOShortCommand(p, PortP, SBREAK, 2, 250) == RIO_FAIL) { + rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n"); + rc = -EIO; + } + } + break; + case TCSBRKP: + if ( PortP->State & RIO_DELETED ) { + rio_dprintk (RIO_DEBUG_TTY, "BREAK on deleted RTA\n"); + rc = -EIO; + } else { + int l; + l = arg?arg*100:250; + if (l > 255) l = 255; + if (RIOShortCommand(p, PortP, SBREAK, 2, arg?arg*100:250) == RIO_FAIL) { + rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n"); + rc = -EIO; + } + } + break; + case TIOCSSERIAL: + rc = -EFAULT; + if (access_ok(VERIFY_READ, (void *) arg, + sizeof(struct serial_struct))) + rc = gs_setserial(&PortP->gs, (struct serial_struct *) arg); + break; +#if 0 + /* + * note: these IOCTLs no longer reach here. Use + * tiocmset/tiocmget driver methods instead. The + * #if 0 disablement predates this comment. + */ + case TIOCMGET: + rc = -EFAULT; + if (access_ok(VERIFY_WRITE, (void *) arg, + sizeof(unsigned int))) { + rc = 0; + ival = rio_getsignals(port); + put_user(ival, (unsigned int *) arg); + } + break; + case TIOCMBIS: + if ((rc = get_user(ival, (unsigned int *) arg)) == 0) { + rio_setsignals(port, ((ival & TIOCM_DTR) ? 1 : -1), + ((ival & TIOCM_RTS) ? 1 : -1)); + } + break; + case TIOCMBIC: + if ((rc = get_user(ival, (unsigned int *) arg)) == 0) { + rio_setsignals(port, ((ival & TIOCM_DTR) ? 0 : -1), + ((ival & TIOCM_RTS) ? 0 : -1)); + } + break; + case TIOCMSET: + if ((rc = get_user(ival, (unsigned int *) arg)) == 0) { + rio_setsignals(port, ((ival & TIOCM_DTR) ? 1 : 0), + ((ival & TIOCM_RTS) ? 1 : 0)); + } + break; +#endif + 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 (rio_receive_chars()) we look to see if the + * upper layer can accept more (as noted here in rio_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 + * rio_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 rio_throttle (struct tty_struct * tty) +{ + struct Port *port = (struct Port *)tty->driver_data; + + func_enter(); + /* 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->State |= RIO_THROTTLE_RX; + } + + func_exit(); +} + + +static void rio_unthrottle (struct tty_struct * tty) +{ + struct Port *port = (struct Port *)tty->driver_data; + + func_enter(); + /* Always unthrottle even if flow control is not enabled on + * this port in case we disabled flow control while the port + * was throttled + */ + + port->State &= ~RIO_THROTTLE_RX; + + func_exit(); + return; +} + + + + + +/* ********************************************************************** * + * Here are the initialization routines. * + * ********************************************************************** */ + + +static struct vpd_prom *get_VPD_PROM (struct Host *hp) +{ + static struct vpd_prom vpdp; + char *p; + int i; + + func_enter(); + rio_dprintk (RIO_DEBUG_PROBE, "Going to verify vpd prom at %p.\n", + hp->Caddr + RIO_VPD_ROM); + + p = (char *) &vpdp; + for (i=0;i< sizeof (struct vpd_prom);i++) + *p++ = readb (hp->Caddr+RIO_VPD_ROM + i*2); + /* read_rio_byte (hp, RIO_VPD_ROM + i*2); */ + + /* Terminate the identifier string. + *** requires one extra byte in struct vpd_prom *** */ + *p++=0; + + if (rio_debug & RIO_DEBUG_PROBE) + my_hd ((char *)&vpdp, 0x20); + + func_exit(); + + return &vpdp; +} + +static struct tty_operations rio_ops = { + .open = riotopen, + .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 = rio_ioctl, + .throttle = rio_throttle, + .unthrottle = rio_unthrottle, + .set_termios = gs_set_termios, + .stop = gs_stop, + .start = gs_start, + .hangup = gs_hangup, +}; + +static int rio_init_drivers(void) +{ + int error = -ENOMEM; + + rio_driver = alloc_tty_driver(256); + if (!rio_driver) + goto out; + rio_driver2 = alloc_tty_driver(256); + if (!rio_driver2) + goto out1; + + func_enter(); + + rio_driver->owner = THIS_MODULE; + rio_driver->driver_name = "specialix_rio"; + rio_driver->name = "ttySR"; + rio_driver->major = RIO_NORMAL_MAJOR0; + rio_driver->type = TTY_DRIVER_TYPE_SERIAL; + rio_driver->subtype = SERIAL_TYPE_NORMAL; + rio_driver->init_termios = tty_std_termios; + rio_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + rio_driver->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(rio_driver, &rio_ops); + + rio_driver2->owner = THIS_MODULE; + rio_driver2->driver_name = "specialix_rio"; + rio_driver2->name = "ttySR"; + rio_driver2->major = RIO_NORMAL_MAJOR1; + rio_driver2->type = TTY_DRIVER_TYPE_SERIAL; + rio_driver2->subtype = SERIAL_TYPE_NORMAL; + rio_driver2->init_termios = tty_std_termios; + rio_driver2->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + rio_driver2->flags = TTY_DRIVER_REAL_RAW; + tty_set_operations(rio_driver2, &rio_ops); + + rio_dprintk (RIO_DEBUG_INIT, "set_termios = %p\n", gs_set_termios); + + if ((error = tty_register_driver(rio_driver))) + goto out2; + if ((error = tty_register_driver(rio_driver2))) + goto out3; + func_exit(); + return 0; +out3: + tty_unregister_driver(rio_driver); +out2: + put_tty_driver(rio_driver2); +out1: + put_tty_driver(rio_driver); +out: + printk(KERN_ERR "rio: Couldn't register a rio driver, error = %d\n", + error); + return 1; +} + + +static void * ckmalloc (int size) +{ + void *p; + + p = kmalloc(size, GFP_KERNEL); + if (p) + memset(p, 0, size); + return p; +} + + + +static int rio_init_datastructures (void) +{ + int i; + struct Port *port; + func_enter(); + + /* Many drivers statically allocate the maximum number of ports + There is no reason not to allocate them dynamically. Is there? -- REW */ + /* However, the RIO driver allows users to configure their first + RTA as the ports numbered 504-511. We therefore need to allocate + the whole range. :-( -- REW */ + +#define RI_SZ sizeof(struct rio_info) +#define HOST_SZ sizeof(struct Host) +#define PORT_SZ sizeof(struct Port *) +#define TMIO_SZ sizeof(struct termios *) + rio_dprintk (RIO_DEBUG_INIT, "getting : %d %d %d %d %d bytes\n", + RI_SZ, + RIO_HOSTS * HOST_SZ, + RIO_PORTS * PORT_SZ, + RIO_PORTS * TMIO_SZ, + RIO_PORTS * TMIO_SZ); + + if (!(p = ckmalloc ( RI_SZ))) goto free0; + if (!(p->RIOHosts = ckmalloc (RIO_HOSTS * HOST_SZ))) goto free1; + if (!(p->RIOPortp = ckmalloc (RIO_PORTS * PORT_SZ))) goto free2; + p->RIOConf = RIOConf; + rio_dprintk (RIO_DEBUG_INIT, "Got : %p %p %p\n", + p, p->RIOHosts, p->RIOPortp); + +#if 1 + for (i = 0; i < RIO_PORTS; i++) { + port = p->RIOPortp[i] = ckmalloc (sizeof (struct Port)); + if (!port) { + goto free6; + } + rio_dprintk (RIO_DEBUG_INIT, "initing port %d (%d)\n", i, port->Mapped); + port->PortNum = i; + port->gs.magic = RIO_MAGIC; + port->gs.close_delay = HZ/2; + port->gs.closing_wait = 30 * HZ; + port->gs.rd = &rio_real_driver; + spin_lock_init(&port->portSem); + /* + * Initializing wait queue + */ + init_waitqueue_head(&port->gs.open_wait); + init_waitqueue_head(&port->gs.close_wait); + } +#else + /* We could postpone initializing them to when they are configured. */ +#endif + + + + if (rio_debug & RIO_DEBUG_INIT) { + my_hd (&rio_real_driver, sizeof (rio_real_driver)); + } + + + func_exit(); + return 0; + + free6:for (i--;i>=0;i--) + kfree (p->RIOPortp[i]); +/*free5: + free4: + free3:*/kfree (p->RIOPortp); + free2:kfree (p->RIOHosts); + free1: + rio_dprintk (RIO_DEBUG_INIT, "Not enough memory! %p %p %p\n", + p, p->RIOHosts, p->RIOPortp); + kfree(p); + free0: + return -ENOMEM; +} + +static void __exit rio_release_drivers(void) +{ + func_enter(); + tty_unregister_driver(rio_driver2); + tty_unregister_driver(rio_driver); + put_tty_driver(rio_driver2); + put_tty_driver(rio_driver); + func_exit(); +} + + +#ifdef CONFIG_PCI + /* This was written for SX, but applies to RIO too... + (including bugs....) + + There is another bit besides Bit 17. Turning that bit off + (on boards shipped with the fix in the eeprom) results in a + hang on the next access to the card. + */ + + /******************************************************** + * 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_rio_pci (struct pci_dev *pdev) +{ + unsigned int hwbase; + unsigned long rebase; + unsigned int t; + +#define CNTRL_REG_OFFSET 0x50 +#define CNTRL_REG_GOODVALUE 0x18260000 + + pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase); + hwbase &= PCI_BASE_ADDRESS_MEM_MASK; + rebase = (ulong) ioremap(hwbase, 0x80); + t = readl (rebase + CNTRL_REG_OFFSET); + if (t != CNTRL_REG_GOODVALUE) { + printk (KERN_DEBUG "rio: performing cntrl reg fix: %08x -> %08x\n", + t, CNTRL_REG_GOODVALUE); + writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET); + } + iounmap((char*) rebase); +} +#endif + + +static int __init rio_init(void) +{ + int found = 0; + int i; + struct Host *hp; + int retval; + struct vpd_prom *vpdp; + int okboard; + +#ifdef CONFIG_PCI + struct pci_dev *pdev = NULL; + unsigned int tint; + unsigned short tshort; +#endif + + func_enter(); + rio_dprintk (RIO_DEBUG_INIT, "Initing rio module... (rio_debug=%d)\n", + rio_debug); + + if (abs ((long) (&rio_debug) - rio_debug) < 0x10000) { + printk (KERN_WARNING "rio: rio_debug is an address, instead of a value. " + "Assuming -1. Was %x/%p.\n", rio_debug, &rio_debug); + rio_debug=-1; + } + + if (misc_register(&rio_fw_device) < 0) { + printk(KERN_ERR "RIO: Unable to register firmware loader driver.\n"); + return -EIO; + } + + retval = rio_init_datastructures (); + if (retval < 0) { + misc_deregister(&rio_fw_device); + return retval; + } + +#ifdef CONFIG_PCI + /* First look for the JET devices: */ + 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; + rio_dprintk (RIO_DEBUG_PROBE, "Got a specialix card: %x.\n", tint); + if (tshort != 0x0100) { + rio_dprintk (RIO_DEBUG_PROBE, "But it's not a RIO card (%d)...\n", + tshort); + continue; + } + rio_dprintk (RIO_DEBUG_PROBE, "cp1\n"); + + pci_read_config_dword(pdev, PCI_BASE_ADDRESS_2, &tint); + + hp = &p->RIOHosts[p->RIONumHosts]; + hp->PaddrP = tint & PCI_BASE_ADDRESS_MEM_MASK; + hp->Ivec = pdev->irq; + if (((1 << hp->Ivec) & rio_irqmask) == 0) + hp->Ivec = 0; + hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN); + hp->CardP = (struct DpRam *) hp->Caddr; + hp->Type = RIO_PCI; + hp->Copy = rio_pcicopy; + hp->Mode = RIO_PCI_BOOT_FROM_RAM; + spin_lock_init(&hp->HostLock); + rio_reset_interrupt (hp); + rio_start_card_running (hp); + + rio_dprintk (RIO_DEBUG_PROBE, "Going to test it (%p/%p).\n", + (void *)p->RIOHosts[p->RIONumHosts].PaddrP, + p->RIOHosts[p->RIONumHosts].Caddr); + if (RIOBoardTest( p->RIOHosts[p->RIONumHosts].PaddrP, + p->RIOHosts[p->RIONumHosts].Caddr, + RIO_PCI, 0 ) == RIO_SUCCESS) { + rio_dprintk (RIO_DEBUG_INIT, "Done RIOBoardTest\n"); + WBYTE(p->RIOHosts[p->RIONumHosts].ResetInt, 0xff); + p->RIOHosts[p->RIONumHosts].UniqueNum = + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[0]) &0xFF)<< 0)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[1]) &0xFF)<< 8)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[2]) &0xFF)<<16)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[3]) &0xFF)<<24); + rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n", + p->RIOHosts[p->RIONumHosts].UniqueNum); + + fix_rio_pci (pdev); + p->RIOLastPCISearch = RIO_SUCCESS; + p->RIONumHosts++; + found++; + } else { + iounmap((char*) (p->RIOHosts[p->RIONumHosts].Caddr)); + } + } + + /* Then look for the older PCI card.... : */ + + /* These older PCI cards have problems (only byte-mode access is + supported), which makes them a bit awkward to support. + They also have problems sharing interrupts. Be careful. + (The driver now refuses to share interrupts for these + cards. This should be sufficient). + */ + + /* Then look for the older RIO/PCI devices: */ + while ((pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX, + PCI_DEVICE_ID_SPECIALIX_RIO, + pdev))) { + if (pci_enable_device(pdev)) continue; + +#ifdef CONFIG_RIO_OLDPCI + pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &tint); + + hp = &p->RIOHosts[p->RIONumHosts]; + hp->PaddrP = tint & PCI_BASE_ADDRESS_MEM_MASK; + hp->Ivec = pdev->irq; + if (((1 << hp->Ivec) & rio_irqmask) == 0) + hp->Ivec = 0; + hp->Ivec |= 0x8000; /* Mark as non-sharable */ + hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN); + hp->CardP = (struct DpRam *) hp->Caddr; + hp->Type = RIO_PCI; + hp->Copy = rio_pcicopy; + hp->Mode = RIO_PCI_BOOT_FROM_RAM; + spin_lock_init(&hp->HostLock); + + rio_dprintk (RIO_DEBUG_PROBE, "Ivec: %x\n", hp->Ivec); + rio_dprintk (RIO_DEBUG_PROBE, "Mode: %x\n", hp->Mode); + + rio_reset_interrupt (hp); + rio_start_card_running (hp); + rio_dprintk (RIO_DEBUG_PROBE, "Going to test it (%p/%p).\n", + (void *)p->RIOHosts[p->RIONumHosts].PaddrP, + p->RIOHosts[p->RIONumHosts].Caddr); + if (RIOBoardTest( p->RIOHosts[p->RIONumHosts].PaddrP, + p->RIOHosts[p->RIONumHosts].Caddr, + RIO_PCI, 0 ) == RIO_SUCCESS) { + WBYTE(p->RIOHosts[p->RIONumHosts].ResetInt, 0xff); + p->RIOHosts[p->RIONumHosts].UniqueNum = + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[0]) &0xFF)<< 0)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[1]) &0xFF)<< 8)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[2]) &0xFF)<<16)| + ((RBYTE(p->RIOHosts[p->RIONumHosts].Unique[3]) &0xFF)<<24); + rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n", + p->RIOHosts[p->RIONumHosts].UniqueNum); + + p->RIOLastPCISearch = RIO_SUCCESS; + p->RIONumHosts++; + found++; + } else { + iounmap((char*) (p->RIOHosts[p->RIONumHosts].Caddr)); + } +#else + printk (KERN_ERR "Found an older RIO PCI card, but the driver is not " + "compiled to support it.\n"); +#endif + } +#endif /* PCI */ + + /* Now probe for ISA cards... */ + for (i=0;i<NR_RIO_ADDRS;i++) { + hp = &p->RIOHosts[p->RIONumHosts]; + hp->PaddrP = rio_probe_addrs[i]; + /* There was something about the IRQs of these cards. 'Forget what.--REW */ + hp->Ivec = 0; + hp->Caddr = ioremap(p->RIOHosts[p->RIONumHosts].PaddrP, RIO_WINDOW_LEN); + hp->CardP = (struct DpRam *) hp->Caddr; + hp->Type = RIO_AT; + hp->Copy = rio_pcicopy; /* AT card PCI???? - PVDL + * -- YES! this is now a normal copy. Only the + * old PCI card uses the special PCI copy. + * Moreover, the ISA card will work with the + * special PCI copy anyway. -- REW */ + hp->Mode = 0; + spin_lock_init(&hp->HostLock); + + vpdp = get_VPD_PROM (hp); + rio_dprintk (RIO_DEBUG_PROBE, "Got VPD ROM\n"); + okboard = 0; + if ((strncmp (vpdp->identifier, RIO_ISA_IDENT, 16) == 0) || + (strncmp (vpdp->identifier, RIO_ISA2_IDENT, 16) == 0) || + (strncmp (vpdp->identifier, RIO_ISA3_IDENT, 16) == 0)) { + /* Board is present... */ + if (RIOBoardTest (hp->PaddrP, + hp->Caddr, RIO_AT, 0) == RIO_SUCCESS) { + /* ... and feeling fine!!!! */ + rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, uniqid = %x.\n", + p->RIOHosts[p->RIONumHosts].UniqueNum); + if (RIOAssignAT(p, hp->PaddrP, hp->Caddr, 0)) { + rio_dprintk (RIO_DEBUG_PROBE, "Hmm Tested ok, host%d uniqid = %x.\n", + p->RIONumHosts, + p->RIOHosts[p->RIONumHosts-1].UniqueNum); + okboard++; + found++; + } + } + + if (!okboard) + iounmap ((char*) (hp->Caddr)); + } + } + + + for (i=0;i<p->RIONumHosts;i++) { + hp = &p->RIOHosts[i]; + if (hp->Ivec) { + int mode = SA_SHIRQ; + if (hp->Ivec & 0x8000) {mode = 0; hp->Ivec &= 0x7fff;} + rio_dprintk (RIO_DEBUG_INIT, "Requesting interrupt hp: %p rio_interrupt: %d Mode: %x\n", hp,hp->Ivec, hp->Mode); + retval = request_irq (hp->Ivec, rio_interrupt, mode, "rio", hp); + rio_dprintk (RIO_DEBUG_INIT, "Return value from request_irq: %d\n", retval); + if (retval) { + printk(KERN_ERR "rio: Cannot allocate irq %d.\n", hp->Ivec); + hp->Ivec = 0; + } + rio_dprintk (RIO_DEBUG_INIT, "Got irq %d.\n", hp->Ivec); + if (hp->Ivec != 0){ + rio_dprintk (RIO_DEBUG_INIT, "Enabling interrupts on rio card.\n"); + hp->Mode |= RIO_PCI_INT_ENABLE; + } else + hp->Mode &= !RIO_PCI_INT_ENABLE; + rio_dprintk (RIO_DEBUG_INIT, "New Mode: %x\n", hp->Mode); + rio_start_card_running (hp); + } + /* Init the timer "always" to make sure that it can safely be + deleted when we unload... */ + + init_timer (&hp->timer); + if (!hp->Ivec) { + rio_dprintk (RIO_DEBUG_INIT, "Starting polling at %dj intervals.\n", + rio_poll); + hp->timer.data = i; + hp->timer.function = rio_pollfunc; + hp->timer.expires = jiffies + rio_poll; + add_timer (&hp->timer); + } + } + + if (found) { + rio_dprintk (RIO_DEBUG_INIT, "rio: total of %d boards detected.\n", found); + rio_init_drivers (); + } else { + /* deregister the misc device we created earlier */ + misc_deregister(&rio_fw_device); + } + + func_exit(); + return found?0:-EIO; +} + + +static void __exit rio_exit (void) +{ + int i; + struct Host *hp; + + func_enter(); + + for (i=0,hp=p->RIOHosts;i<p->RIONumHosts;i++, hp++) { + RIOHostReset (hp->Type, hp->CardP, hp->Slot); + if (hp->Ivec) { + free_irq (hp->Ivec, hp); + rio_dprintk (RIO_DEBUG_INIT, "freed irq %d.\n", hp->Ivec); + } + /* It is safe/allowed to del_timer a non-active timer */ + del_timer (&hp->timer); + } + + if (misc_deregister(&rio_fw_device) < 0) { + printk (KERN_INFO "rio: couldn't deregister control-device\n"); + } + + + rio_dprintk (RIO_DEBUG_CLEANUP, "Cleaning up drivers\n"); + + rio_release_drivers (); + + /* Release dynamically allocated memory */ + kfree (p->RIOPortp); + kfree (p->RIOHosts); + kfree (p); + + func_exit(); +} + +module_init(rio_init); +module_exit(rio_exit); + +/* + * Anybody who knows why this doesn't work for me, please tell me -- REW. + * Snatched from scsi.c (fixed one spelling error): + * Overrides for Emacs so that we follow Linus' tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local Variables: + * c-indent-level: 4 + * c-brace-imaginary-offset: 0 + * c-brace-offset: -4 + * c-argdecl-indent: 4 + * c-label-offset: -4 + * c-continued-statement-offset: 4 + * c-continued-brace-offset: 0 + * indent-tabs-mode: nil + * tab-width: 8 + * End: + */ + |