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SubjectRe: Update Linux 2.4 Status/TODO list
David Ford wrote:
>
> > 10. To Do But Non Showstopper
> > * PCMCIA/Cardbus hangs (Basically unusable - Hinds pcmcia code is
> > reliable)
> > + PCMCIA crashes on unloading pci_socket
>
> With test8, pcmcia either with kernel code, mixed, or dhinds code; nothing is
> usable.

David,

I'll take a stab at this while my PCMCIA memories are fresh. Can you
please try the attached patch and, when it doesn't work, send me all the
usual details?--- linux-2.4.0-test8/include/pcmcia/ss.h Sat Sep 9 16:19:30 2000
+++ linux-akpm/include/pcmcia/ss.h Wed Sep 13 00:13:06 2000
@@ -82,6 +82,7 @@
#define SS_DMA_MODE 0x0080
#define SS_SPKR_ENA 0x0100
#define SS_OUTPUT_ENA 0x0200
+#define SS_DEBOUNCED 0x0400 /* Tell driver that the debounce delay has ended */

/* Flags for I/O port and memory windows */
#define MAP_ACTIVE 0x01
--- linux-2.4.0-test8/drivers/pcmcia/cardbus.c Sat Sep 9 16:19:26 2000
+++ linux-akpm/drivers/pcmcia/cardbus.c Wed Sep 13 00:13:06 2000
@@ -58,11 +58,6 @@
#include <asm/irq.h>
#include <asm/io.h>

-#ifndef PCMCIA_DEBUG
-#define PCMCIA_DEBUG 1
-#endif
-static int pc_debug = PCMCIA_DEBUG;
-
#define IN_CARD_SERVICES
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
@@ -72,6 +67,11 @@
#include <pcmcia/cistpl.h>
#include "cs_internal.h"
#include "rsrc_mgr.h"
+
+#ifndef PCMCIA_DEBUG
+#define PCMCIA_DEBUG 1
+#endif
+static int pc_debug = PCMCIA_DEBUG;

/*====================================================================*/

--- linux-2.4.0-test8/drivers/pcmcia/cs.c Sat Sep 9 16:19:26 2000
+++ linux-akpm/drivers/pcmcia/cs.c Wed Sep 13 00:13:06 2000
@@ -103,13 +103,13 @@

#define INT_MODULE_PARM(n, v) static int n = v; MODULE_PARM(n, "i")

-INT_MODULE_PARM(setup_delay, HZ/20); /* ticks */
-INT_MODULE_PARM(resume_delay, HZ/5); /* ticks */
-INT_MODULE_PARM(shutdown_delay, HZ/40); /* ticks */
-INT_MODULE_PARM(vcc_settle, 400); /* msecs */
+INT_MODULE_PARM(setup_delay, 10); /* centiseconds */
+INT_MODULE_PARM(resume_delay, 20); /* centiseconds */
+INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */
+INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */
INT_MODULE_PARM(reset_time, 10); /* usecs */
-INT_MODULE_PARM(unreset_delay, 100); /* msecs */
-INT_MODULE_PARM(unreset_check, 100); /* msecs */
+INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */
+INT_MODULE_PARM(unreset_check, 10); /* centiseconds */
INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */

/* Access speed for attribute memory windows */
@@ -446,10 +446,13 @@

static int send_event(socket_info_t *s, event_t event, int priority);

-static void msleep(unsigned int msec)
+/*
+ * Sleep for n_cs centiseconds (1 cs = 1/100th of a second)
+ */
+static void cs_sleep(unsigned int n_cs)
{
current->state = TASK_INTERRUPTIBLE;
- schedule_timeout( (msec * HZ + 999) / 1000);
+ schedule_timeout( (n_cs * HZ + 99) / 100);
}

static void shutdown_socket(socket_info_t *s)
@@ -504,7 +507,7 @@
if (!(val & SS_PENDING))
break;
if (--setup_timeout) {
- msleep(100);
+ cs_sleep(10);
continue;
}
printk(KERN_NOTICE "cs: socket %p voltage interrogation"
@@ -516,7 +519,7 @@
if (val & SS_DETECT) {
DEBUG(1, "cs: setup_socket(%p): applying power\n", s);
s->state |= SOCKET_PRESENT;
- s->socket.flags = 0;
+ s->socket.flags &= SS_DEBOUNCED;
if (val & SS_3VCARD)
s->socket.Vcc = s->socket.Vpp = 33;
else if (!(val & SS_XVCARD))
@@ -533,7 +536,7 @@
#endif
}
set_socket(s, &s->socket);
- msleep(vcc_settle);
+ cs_sleep(vcc_settle);
reset_socket(s);
ret = 1;
} else {
@@ -561,7 +564,7 @@
udelay((long)reset_time);
s->socket.flags &= ~SS_RESET;
set_socket(s, &s->socket);
- msleep(unreset_delay);
+ cs_sleep(unreset_delay);
unreset_socket(s);
} /* reset_socket */

@@ -580,11 +583,11 @@
break;
DEBUG(2, "cs: socket %d not ready yet\n", s->sock);
if (--setup_timeout) {
- msleep(unreset_check);
+ cs_sleep(unreset_check);
continue;
}
printk(KERN_NOTICE "cs: socket %p timed out during"
- " reset\n", s);
+ " reset. Try increasing setup_delay.\n", s);
s->state &= ~EVENT_MASK;
return;
}
@@ -656,7 +659,7 @@
DEBUG(0, "cs: flushing pending setup\n");
s->state &= ~EVENT_MASK;
}
- msleep(shutdown_delay);
+ cs_sleep(shutdown_delay);
s->state &= ~SOCKET_PRESENT;
shutdown_socket(s);
}
@@ -679,11 +682,13 @@
}
s->state |= SOCKET_SETUP_PENDING;
if (s->state & SOCKET_SUSPEND)
- msleep(resume_delay);
+ cs_sleep(resume_delay);
else
- msleep(setup_delay);
+ cs_sleep(setup_delay);
+ s->socket.flags |= SS_DEBOUNCED;
if (setup_socket(s) == 0)
s->state &= ~SOCKET_SETUP_PENDING;
+ s->socket.flags &= ~SS_DEBOUNCED;
}
}
if (events & SS_BATDEAD)
--- linux-2.4.0-test8/drivers/pcmcia/yenta.c Sat Sep 9 16:19:26 2000
+++ linux-akpm/drivers/pcmcia/yenta.c Wed Sep 13 00:13:06 2000
@@ -233,6 +233,11 @@
{
u16 bridge;

+ if (state->flags & SS_DEBOUNCED) {
+ /* The insertion debounce period has ended. Clear any pending insertion events */
+ socket->events &= ~SS_DETECT;
+ state->flags &= ~SS_DEBOUNCED; /* SS_DEBOUNCED is oneshot */
+ }
yenta_set_power(socket, state);
socket->io_irq = state->io_irq;
bridge = config_readw(socket, CB_BRIDGE_CONTROL) & ~(CB_BRIDGE_CRST | CB_BRIDGE_INTR);
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