Roger.
Rogier Wolff wrote:
>
> Hi Linus, Alan,
>
> The patch below implements breaks (correctly) for the RIO and SX
> cards.
>
> We started out trying to fix one thing, but found that the 2.4.4 rio
> driver was behind on several patches.
>
> Roger Wolff.
> Patrick van de Lageweg.
>
> -----------
diff -u -r linux-2.4.4.clean/drivers/char/generic_serial.c linux-2.4.4.rio_close/drivers/char/generic_serial.c
--- linux-2.4.4.clean/drivers/char/generic_serial.c Fri Dec 29 23:35:47 2000
+++ linux-2.4.4.rio_close/drivers/char/generic_serial.c Mon May 14 16:36:39 2001
@@ -344,7 +344,7 @@
struct gs_port *port = ptr;
long end_jiffies;
int jiffies_to_transmit, charsleft = 0, rv = 0;
- int to, rcib;
+ int rcib;
func_enter();
@@ -368,6 +368,7 @@
return rv;
}
/* stop trying: now + twice the time it would normally take + seconds */
+ if (timeout == 0) timeout = MAX_SCHEDULE_TIMEOUT;
end_jiffies = jiffies;
if (timeout != MAX_SCHEDULE_TIMEOUT)
end_jiffies += port->baud?(2 * rcib * 10 * HZ / port->baud):0;
@@ -376,11 +377,9 @@
gs_dprintk (GS_DEBUG_FLUSH, "now=%lx, end=%lx (%ld).\n",
jiffies, end_jiffies, end_jiffies-jiffies);
- to = 100;
/* the expression is actually jiffies < end_jiffies, but that won't
work around the wraparound. Tricky eh? */
- while (to-- &&
- (charsleft = gs_real_chars_in_buffer (port->tty)) &&
+ while ((charsleft = gs_real_chars_in_buffer (port->tty)) &&
time_after (end_jiffies, jiffies)) {
/* Units check:
chars * (bits/char) * (jiffies /sec) / (bits/sec) = jiffies!
@@ -1059,6 +1058,19 @@
copy_to_user(sp, &sio, sizeof(struct serial_struct));
}
+
+void gs_got_break(struct gs_port *port)
+{
+ if (port->flags & ASYNC_SAK) {
+ do_SAK (port->tty);
+ }
+ *(port->tty->flip.flag_buf_ptr) = TTY_BREAK;
+ port->tty->flip.flag_buf_ptr++;
+ port->tty->flip.char_buf_ptr++;
+ port->tty->flip.count++;
+}
+
+
EXPORT_SYMBOL(gs_put_char);
EXPORT_SYMBOL(gs_write);
EXPORT_SYMBOL(gs_write_room);
@@ -1075,4 +1087,4 @@
EXPORT_SYMBOL(gs_init_port);
EXPORT_SYMBOL(gs_setserial);
EXPORT_SYMBOL(gs_getserial);
-
+EXPORT_SYMBOL(gs_got_break);
diff -u -r linux-2.4.4.clean/drivers/char/rio/linux_compat.h linux-2.4.4.rio_close/drivers/char/rio/linux_compat.h
--- linux-2.4.4.clean/drivers/char/rio/linux_compat.h Fri Aug 11 23:51:33 2000
+++ linux-2.4.4.rio_close/drivers/char/rio/linux_compat.h Mon May 14 15:11:09 2001
@@ -16,11 +16,13 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <asm/hardirq.h>
+
#define disable(oldspl) save_flags (oldspl)
#define restore(oldspl) restore_flags (oldspl)
-#define sysbrk(x) kmalloc ((x), GFP_KERNEL)
+#define sysbrk(x) kmalloc ((x),in_interrupt()? GFP_ATOMIC : GFP_KERNEL)
#define sysfree(p,size) kfree ((p))
#define WBYTE(p,v) writeb(v, &p)
diff -u -r linux-2.4.4.clean/drivers/char/rio/rio_linux.c linux-2.4.4.rio_close/drivers/char/rio/rio_linux.c
--- linux-2.4.4.clean/drivers/char/rio/rio_linux.c Wed May 2 18:29:56 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/rio_linux.c Mon May 14 16:03:39 2001
@@ -58,6 +58,7 @@
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/miscdevice.h>
+#include <linux/init.h>
#include <linux/compatmac.h>
#include <linux/generic_serial.h>
@@ -165,7 +166,7 @@
/* 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 */
+ /* breakinterval */ 25, /* x10 mS XXX: units seem to be 1ms not 10! -- REW*/
/* timer */ 10, /* mS */
/* RtaLoadBase */ 0x7000,
/* HostLoadBase */ 0x7C00,
@@ -203,11 +204,8 @@
unsigned int cmd, unsigned long arg);
static int rio_init_drivers(void);
-
void my_hd (void *addr, int len);
-
-
static struct tty_driver rio_driver, rio_callout_driver;
static struct tty_driver rio_driver2, rio_callout_driver2;
@@ -248,14 +246,12 @@
long rio_irqmask = -1;
#ifndef TWO_ZERO
-#ifdef MODULE
MODULE_AUTHOR("Rogier Wolff <R.E.Wolff@bitwizard.nl>, Patrick van de Lageweg <patrick@bitwizard.nl>");
MODULE_DESCRIPTION("RIO driver");
MODULE_PARM(rio_poll, "i");
MODULE_PARM(rio_debug, "i");
MODULE_PARM(rio_irqmask, "i");
#endif
-#endif
static struct real_driver rio_real_driver = {
rio_disable_tx_interrupts,
@@ -383,8 +379,8 @@
int rio_ismodem (kdev_t device)
{
- return (MAJOR (device) != RIO_NORMAL_MAJOR0) &&
- (MAJOR (device) != RIO_NORMAL_MAJOR1);
+ return (MAJOR (device) == RIO_NORMAL_MAJOR0) ||
+ (MAJOR (device) == RIO_NORMAL_MAJOR1);
}
@@ -455,7 +451,6 @@
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);
@@ -624,8 +619,12 @@
/* 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) {
@@ -654,8 +653,14 @@
exit minicom. I expect an "oops". -- REW */
static void rio_hungup (void *ptr)
{
- func_enter ();
+ struct Port *PortP;
+
+ func_enter();
+
+ PortP = (struct Port *)ptr;
+ PortP->gs.tty = NULL;
rio_dec_mod_count ();
+
func_exit ();
}
@@ -679,9 +684,8 @@
PortP->gs.count = 0;
}
-
+ PortP->gs.tty = NULL;
rio_dec_mod_count ();
-
func_exit ();
}
@@ -700,24 +704,28 @@
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)
{
-#if 0
int rc;
- struct rio_port *port = tty->driver_data;
+ struct Port *PortP;
int ival;
- /* func_enter2(); */
+ 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 = verify_area(VERIFY_READ, (void *) arg,
sizeof(int))) == 0) {
@@ -730,13 +738,39 @@
case TIOCGSERIAL:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(struct serial_struct))) == 0)
- gs_getserial(&port->gs, (struct serial_struct *) arg);
+ 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:
if ((rc = verify_area(VERIFY_READ, (void *) arg,
sizeof(struct serial_struct))) == 0)
- rc = gs_setserial(&port->gs, (struct serial_struct *) arg);
+ rc = gs_setserial(&PortP->gs, (struct serial_struct *) arg);
break;
+#if 0
case TIOCMGET:
if ((rc = verify_area(VERIFY_WRITE, (void *) arg,
sizeof(unsigned int))) == 0) {
@@ -768,17 +802,13 @@
((ival & TIOCM_RTS) ? 1 : 0));
}
break;
-
+#endif
default:
rc = -ENOIOCTLCMD;
break;
}
- /* func_exit(); */
+ func_exit();
return rc;
-#else
- return -ENOIOCTLCMD;
-#endif
-
}
@@ -1038,8 +1068,7 @@
return -ENOMEM;
}
-#ifdef MODULE
-static void rio_release_drivers(void)
+static void __exit rio_release_drivers(void)
{
func_enter();
tty_unregister_driver (&rio_callout_driver2);
@@ -1048,7 +1077,6 @@
tty_unregister_driver (&rio_driver);
func_exit();
}
-#endif
#ifdef TWO_ZERO
#define PDEV unsigned char pci_bus, unsigned pci_fun
@@ -1101,11 +1129,7 @@
#endif
-#ifdef MODULE
-#define rio_init init_module
-#endif
-
-int rio_init(void)
+static int __init rio_init(void)
{
int found = 0;
int i;
@@ -1255,6 +1279,7 @@
hp->Type = RIO_PCI;
hp->Copy = rio_pcicopy;
hp->Mode = RIO_PCI_BOOT_FROM_RAM;
+ hp->HostLock = SPIN_LOCK_UNLOCKED;
rio_dprintk (RIO_DEBUG_PROBE, "Ivec: %x\n", hp->Ivec);
rio_dprintk (RIO_DEBUG_PROBE, "Mode: %x\n", hp->Mode);
@@ -1310,6 +1335,7 @@
* Moreover, the ISA card will work with the
* special PCI copy anyway. -- REW */
hp->Mode = 0;
+ hp->HostLock = SPIN_LOCK_UNLOCKED;
vpdp = get_VPD_PROM (hp);
rio_dprintk (RIO_DEBUG_PROBE, "Got VPD ROM\n");
@@ -1388,8 +1414,7 @@
}
-#ifdef MODULE
-void cleanup_module(void)
+static void __exit rio_exit (void)
{
int i;
struct Host *hp;
@@ -1424,9 +1449,9 @@
func_exit();
}
-#endif
-
+module_init(rio_init);
+module_exit(rio_exit);
/*
* Anybody who knows why this doesn't work for me, please tell me -- REW.
diff -u -r linux-2.4.4.clean/drivers/char/rio/rio_linux.h linux-2.4.4.rio_close/drivers/char/rio/rio_linux.h
--- linux-2.4.4.clean/drivers/char/rio/rio_linux.h Fri May 11 15:28:12 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/rio_linux.h Mon May 14 16:34:21 2001
@@ -95,28 +95,27 @@
#if 1
#define rio_spin_lock_irqsave(sem, flags) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinlockirqsave: %p %s:%d\n", \
- sem, __FILE__, __LINE__);\
- spin_lock_irqsave(sem, flags);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ spin_lock_irqsave(sem, flags);\
+ } while (0)
#define rio_spin_unlock_irqrestore(sem, flags) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinunlockirqrestore: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_unlock_irqrestore(sem, flags);\
- } while (0)
-
+ sem, __FILE__, __LINE__);\
+ spin_unlock_irqrestore(sem, flags);\
+ } while (0)
#define rio_spin_lock(sem) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinlock: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_lock(sem);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ spin_lock(sem);\
+ } while (0)
#define rio_spin_unlock(sem) do { \
rio_dprintk (RIO_DEBUG_SPINLOCK, "spinunlock: %p %s:%d\n",\
- sem, __FILE__, __LINE__);\
- spin_unlock(sem);\
- } while (0)
+ sem, __FILE__, __LINE__);\
+ spin_unlock(sem);\
+ } while (0)
#else
#define rio_spin_lock_irqsave(sem, flags) \
spin_lock_irqsave(sem, flags)
@@ -165,7 +164,7 @@
#define rio_memcpy_fromio memcpy_fromio
#endif
-#define DEBUG
+#define DEBUG 1
/*
diff -u -r linux-2.4.4.clean/drivers/char/rio/rioboot.c linux-2.4.4.rio_close/drivers/char/rio/rioboot.c
--- linux-2.4.4.clean/drivers/char/rio/rioboot.c Thu Mar 8 17:34:10 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/rioboot.c Mon May 14 16:19:20 2001
@@ -38,6 +38,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/interrupt.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
diff -u -r linux-2.4.4.clean/drivers/char/rio/riocmd.c linux-2.4.4.rio_close/drivers/char/rio/riocmd.c
--- linux-2.4.4.clean/drivers/char/rio/riocmd.c Thu Mar 8 17:34:10 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/riocmd.c Mon May 14 16:18:45 2001
@@ -474,17 +474,18 @@
rio_spin_lock_irqsave(&PortP->portSem, flags);
switch( RBYTE(PktCmdP->Command) ) {
case BREAK_RECEIVED:
- rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n");
+ rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n");
/* If the current line disc. is not multi-threading and
the current processor is not the default, reset rup_intr
and return FALSE to ensure that the command packet is
not freed. */
/* Call tmgr HANGUP HERE */
/* Fix this later when every thing works !!!! RAMRAJ */
+ gs_got_break (PortP);
break;
case COMPLETE:
- rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n",
+ rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n",
RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts);
subCommand = 1;
switch (RBYTE(PktCmdP->SubCommand)) {
@@ -549,6 +550,8 @@
*/
if (PortP->gs.tty == NULL)
break;
+ if (PortP->gs.tty->termios == NULL)
+ break;
if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) &&
((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) {
@@ -623,7 +626,8 @@
struct CmdBlk *CmdBlkP;
CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk));
- bzero(CmdBlkP, sizeof(struct CmdBlk));
+ if (CmdBlkP)
+ bzero(CmdBlkP, sizeof(struct CmdBlk));
return CmdBlkP;
}
diff -u -r linux-2.4.4.clean/drivers/char/rio/rioinit.c linux-2.4.4.rio_close/drivers/char/rio/rioinit.c
--- linux-2.4.4.clean/drivers/char/rio/rioinit.c Thu Mar 8 17:34:10 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/rioinit.c Fri May 11 15:48:33 2001
@@ -1446,7 +1446,7 @@
}
RIODefaultName(p, HostP, rup);
}
- HostP->UnixRups[rup].RupLock = -1;
+ HostP->UnixRups[rup].RupLock = SPIN_LOCK_UNLOCKED;
}
}
}
diff -u -r linux-2.4.4.clean/drivers/char/rio/riotable.c linux-2.4.4.rio_close/drivers/char/rio/riotable.c
--- linux-2.4.4.clean/drivers/char/rio/riotable.c Thu Mar 8 17:34:11 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/riotable.c Fri May 11 15:48:33 2001
@@ -37,6 +37,8 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/interrupt.h>
+
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
diff -u -r linux-2.4.4.clean/drivers/char/rio/riotty.c linux-2.4.4.rio_close/drivers/char/rio/riotty.c
--- linux-2.4.4.clean/drivers/char/rio/riotty.c Fri May 11 15:32:27 2001
+++ linux-2.4.4.rio_close/drivers/char/rio/riotty.c Mon May 14 16:15:15 2001
@@ -96,7 +96,7 @@
#endif
static void RIOClearUp(struct Port *PortP);
-static int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+int RIOShortCommand(struct rio_info *p, struct Port *PortP,
int command, int len, int arg);
@@ -452,8 +452,11 @@
PortP->gs.tty->termios->c_state |= WOPEN;
*/
PortP->State |= RIO_WOPEN;
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+ if (RIODelay (PortP, HUNDRED_MS) == RIO_FAIL)
#if 0
if ( sleep((caddr_t)&tp->tm.c_canqo, TTIPRI|PCATCH))
+#endif
{
/*
** ACTION: verify that this is a good thing
@@ -471,7 +474,6 @@
func_exit ();
return -EINTR;
}
-#endif
}
PortP->State &= ~RIO_WOPEN;
}
@@ -527,8 +529,10 @@
#endif
struct Port *PortP =ptr; /* pointer to the port structure */
int deleted = 0;
- int try = 25;
- int repeat_this = 0xff;
+ int try = -1; /* Disable the timeouts by setting them to -1 */
+ int repeat_this = -1; /* Congrats to those having 15 years of
+ uptime! (You get to break the driver.) */
+ long end_time;
struct tty_struct * tty;
unsigned long flags;
int Modem;
@@ -541,6 +545,12 @@
/* tp = PortP->TtyP;*/ /* Get tty */
tty = PortP->gs.tty;
rio_dprintk (RIO_DEBUG_TTY, "TTY is at address 0x%x\n",(int)tty);
+
+ if (PortP->gs.closing_wait)
+ end_time = jiffies + PortP->gs.closing_wait;
+ else
+ end_time = jiffies + MAX_SCHEDULE_TIMEOUT;
+
Modem = rio_ismodem(tty->device);
#if 0
/* What F.CKING cache? Even then, a higly idle multiprocessor,
@@ -573,7 +583,8 @@
** clear the open bits for this device
*/
PortP->State &= (Modem ? ~RIO_MOPEN : ~RIO_LOPEN);
-
+ PortP->State &= ~RIO_CARR_ON;
+ PortP->ModemState &= ~MSVR1_CD;
/*
** If the device was open as both a Modem and a tty line
** then we need to wimp out here, as the port has not really
@@ -605,7 +616,6 @@
*/
rio_dprintk (RIO_DEBUG_TTY, "Timeout 1 starts\n");
-#if 0
if (!deleted)
while ( (PortP->InUse != NOT_INUSE) && !p->RIOHalted &&
(PortP->TxBufferIn != PortP->TxBufferOut) ) {
@@ -626,7 +636,7 @@
}
rio_spin_lock_irqsave(&PortP->portSem, flags);
}
-#endif
+
PortP->TxBufferIn = PortP->TxBufferOut = 0;
repeat_this = 0xff;
@@ -662,7 +672,7 @@
if (!deleted)
while (try && (PortP->PortState & PORT_ISOPEN)) {
try--;
- if (try == 0) {
+ if (time_after (jiffies, end_time)) {
rio_dprintk (RIO_DEBUG_TTY, "Run out of tries - force the bugger shut!\n" );
RIOPreemptiveCmd(p, PortP,FCLOSE);
break;
@@ -674,7 +684,11 @@
RIOClearUp( PortP );
goto close_end;
}
- RIODelay_ni(PortP, HUNDRED_MS);
+ if (RIODelay(PortP, HUNDRED_MS) == RIO_FAIL) {
+ rio_dprintk (RIO_DEBUG_TTY, "RTA EINTR in delay \n");
+ RIOPreemptiveCmd(p, PortP,FCLOSE);
+ break;
+ }
}
rio_spin_lock_irqsave(&PortP->portSem, flags);
rio_dprintk (RIO_DEBUG_TTY, "Close: try was %d on completion\n", try );
@@ -779,7 +793,7 @@
** Other values of len aren't allowed, and will cause
** a panic.
*/
-static int RIOShortCommand(struct rio_info *p, struct Port *PortP,
+int RIOShortCommand(struct rio_info *p, struct Port *PortP,
int command, int len, int arg)
{
PKT *PacketP;
diff -u -r linux-2.4.4.clean/drivers/char/sx.c linux-2.4.4.rio_close/drivers/char/sx.c
--- linux-2.4.4.clean/drivers/char/sx.c Wed May 2 18:29:57 2001
+++ linux-2.4.4.rio_close/drivers/char/sx.c Mon May 14 15:49:13 2001
@@ -918,7 +918,6 @@
SP_DCEN);
sx_write_channel_byte (port, hi_break,
- I_OTHER(port->gs.tty) ? 0:
(I_IGNBRK(port->gs.tty)?BR_IGN:0 |
I_BRKINT(port->gs.tty)?BR_INT:0));
@@ -1140,9 +1139,7 @@
sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a break.\n");
sx_write_channel_byte (port, hi_state, hi_state);
- if (port->gs.flags & ASYNC_SAK) {
- do_SAK (port->gs.tty);
- }
+ gs_got_break (port);
}
if (hi_state & ST_DCD) {
hi_state &= ~ST_DCD;
-- ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 ** *-- BitWizard writes Linux device drivers for any device you may have! --* * There are old pilots, and there are bold pilots. * There are also old, bald pilots. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/