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path: root/drivers/pcmcia/cs.c
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Diffstat (limited to 'drivers/pcmcia/cs.c')
-rw-r--r--drivers/pcmcia/cs.c116
1 files changed, 45 insertions, 71 deletions
diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
index 976d80706ea..5292db69c42 100644
--- a/drivers/pcmcia/cs.c
+++ b/drivers/pcmcia/cs.c
@@ -29,12 +29,9 @@
#include <linux/device.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
-#include <asm/system.h>
#include <asm/irq.h>
-#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
-#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
@@ -252,38 +249,6 @@ struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr)
}
EXPORT_SYMBOL(pcmcia_get_socket_by_nr);
-/*
- * The central event handler. Send_event() sends an event to the
- * 16-bit subsystem, which then calls the relevant device drivers.
- * Parse_events() interprets the event bits from
- * a card status change report. Do_shutdown() handles the high
- * priority stuff associated with a card removal.
- */
-
-/* NOTE: send_event needs to be called with skt->sem held. */
-
-static int send_event(struct pcmcia_socket *s, event_t event, int priority)
-{
- int ret;
-
- if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL))
- return 0;
-
- dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n",
- event, priority, s->callback);
-
- if (!s->callback)
- return 0;
- if (!try_module_get(s->callback->owner))
- return 0;
-
- ret = s->callback->event(s, event, priority);
-
- module_put(s->callback->owner);
-
- return ret;
-}
-
static int socket_reset(struct pcmcia_socket *skt)
{
int status, i;
@@ -326,7 +291,8 @@ static void socket_shutdown(struct pcmcia_socket *s)
dev_dbg(&s->dev, "shutdown\n");
- send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
+ if (s->callback)
+ s->callback->remove(s);
mutex_lock(&s->ops_mutex);
s->state &= SOCKET_INUSE | SOCKET_PRESENT;
@@ -477,7 +443,8 @@ static int socket_insert(struct pcmcia_socket *skt)
dev_dbg(&skt->dev, "insert done\n");
mutex_unlock(&skt->ops_mutex);
- send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+ if (!(skt->state & SOCKET_CARDBUS) && (skt->callback))
+ skt->callback->add(skt);
} else {
mutex_unlock(&skt->ops_mutex);
socket_shutdown(skt);
@@ -494,7 +461,6 @@ static int socket_suspend(struct pcmcia_socket *skt)
mutex_lock(&skt->ops_mutex);
skt->suspended_state = skt->state;
- send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW);
skt->socket = dead_socket;
skt->ops->set_socket(skt, &skt->socket);
if (skt->ops->suspend)
@@ -518,7 +484,7 @@ static int socket_early_resume(struct pcmcia_socket *skt)
static int socket_late_resume(struct pcmcia_socket *skt)
{
- int ret;
+ int ret = 0;
mutex_lock(&skt->ops_mutex);
skt->state &= ~SOCKET_SUSPEND;
@@ -545,19 +511,31 @@ static int socket_late_resume(struct pcmcia_socket *skt)
return socket_insert(skt);
}
+ if (!(skt->state & SOCKET_CARDBUS) && (skt->callback))
+ ret = skt->callback->early_resume(skt);
+ return ret;
+}
+
+/*
+ * Finalize the resume. In case of a cardbus socket, we have
+ * to rebind the devices as we can't be certain that it has been
+ * replaced, or not.
+ */
+static int socket_complete_resume(struct pcmcia_socket *skt)
+{
+ int ret = 0;
#ifdef CONFIG_CARDBUS
if (skt->state & SOCKET_CARDBUS) {
/* We can't be sure the CardBus card is the same
* as the one previously inserted. Therefore, remove
* and re-add... */
cb_free(skt);
- cb_alloc(skt);
- return 0;
+ ret = cb_alloc(skt);
+ if (ret)
+ cb_free(skt);
}
#endif
-
- send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
- return 0;
+ return ret;
}
/*
@@ -567,11 +545,15 @@ static int socket_late_resume(struct pcmcia_socket *skt)
*/
static int socket_resume(struct pcmcia_socket *skt)
{
+ int err;
if (!(skt->state & SOCKET_SUSPEND))
return -EBUSY;
socket_early_resume(skt);
- return socket_late_resume(skt);
+ err = socket_late_resume(skt);
+ if (!err)
+ err = socket_complete_resume(skt);
+ return err;
}
static void socket_remove(struct pcmcia_socket *skt)
@@ -654,16 +636,8 @@ static int pccardd(void *__skt)
spin_unlock_irqrestore(&skt->thread_lock, flags);
mutex_lock(&skt->skt_mutex);
- if (events) {
- if (events & SS_DETECT)
- socket_detect_change(skt);
- if (events & SS_BATDEAD)
- send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW);
- if (events & SS_BATWARN)
- send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW);
- if (events & SS_READY)
- send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW);
- }
+ if (events & SS_DETECT)
+ socket_detect_change(skt);
if (sysfs_events) {
if (sysfs_events & PCMCIA_UEVENT_EJECT)
@@ -783,7 +757,7 @@ int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c)
s->callback = c;
if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT)
- send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW);
+ s->callback->add(s);
} else
s->callback = NULL;
err:
@@ -823,20 +797,13 @@ int pcmcia_reset_card(struct pcmcia_socket *skt)
break;
}
- ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW);
- if (ret == 0) {
- send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW);
- if (skt->callback)
- skt->callback->suspend(skt);
- mutex_lock(&skt->ops_mutex);
- ret = socket_reset(skt);
- mutex_unlock(&skt->ops_mutex);
- if (ret == 0) {
- send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
- if (skt->callback)
- skt->callback->resume(skt);
- }
- }
+ if (skt->callback)
+ skt->callback->suspend(skt);
+ mutex_lock(&skt->ops_mutex);
+ ret = socket_reset(skt);
+ mutex_unlock(&skt->ops_mutex);
+ if ((ret == 0) && (skt->callback))
+ skt->callback->resume(skt);
ret = 0;
} while (0);
@@ -892,11 +859,17 @@ static int pcmcia_socket_dev_resume_noirq(struct device *dev)
return __pcmcia_pm_op(dev, socket_early_resume);
}
-static int pcmcia_socket_dev_resume(struct device *dev)
+static int __used pcmcia_socket_dev_resume(struct device *dev)
{
return __pcmcia_pm_op(dev, socket_late_resume);
}
+static void __used pcmcia_socket_dev_complete(struct device *dev)
+{
+ WARN(__pcmcia_pm_op(dev, socket_complete_resume),
+ "failed to complete resume");
+}
+
static const struct dev_pm_ops pcmcia_socket_pm_ops = {
/* dev_resume may be called with IRQs enabled */
SET_SYSTEM_SLEEP_PM_OPS(NULL,
@@ -911,6 +884,7 @@ static const struct dev_pm_ops pcmcia_socket_pm_ops = {
.resume_noirq = pcmcia_socket_dev_resume_noirq,
.thaw_noirq = pcmcia_socket_dev_resume_noirq,
.restore_noirq = pcmcia_socket_dev_resume_noirq,
+ .complete = pcmcia_socket_dev_complete,
};
#define PCMCIA_SOCKET_CLASS_PM_OPS (&pcmcia_socket_pm_ops)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 23:38:53 +0000