Commit 8e9e793d authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

[PATCH] pcmcia: merge suspend into device model



Merge the suspend and resume methods for 16-bit PCMCIA cards into the
device model -- for both runtime power management and suspend to ram/disk.

Bugfix in ds.c by Richard Purdie
Signed-Off-By: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 98e4c28b
......@@ -62,6 +62,7 @@ int dpm_runtime_suspend(struct device * dev, pm_message_t state)
up(&dpm_sem);
return error;
}
EXPORT_SYMBOL(dpm_runtime_suspend);
#if 0
......
......@@ -780,8 +780,13 @@ int pccard_reset_card(struct pcmcia_socket *skt)
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 (socket_reset(skt) == CS_SUCCESS)
if (skt->callback)
skt->callback->suspend(skt);
if (socket_reset(skt) == CS_SUCCESS) {
send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW);
if (skt->callback)
skt->callback->resume(skt);
}
}
ret = CS_SUCCESS;
......@@ -812,6 +817,11 @@ int pcmcia_suspend_card(struct pcmcia_socket *skt)
ret = CS_UNSUPPORTED_FUNCTION;
break;
}
if (skt->callback) {
ret = skt->callback->suspend(skt);
if (ret)
break;
}
ret = socket_suspend(skt);
} while (0);
up(&skt->skt_sem);
......@@ -838,6 +848,8 @@ int pcmcia_resume_card(struct pcmcia_socket *skt)
break;
}
ret = socket_resume(skt);
if (!ret && skt->callback)
skt->callback->resume(skt);
} while (0);
up(&skt->skt_sem);
......
......@@ -143,6 +143,8 @@ struct pcmcia_callback{
struct module *owner;
int (*event) (struct pcmcia_socket *s, event_t event, int priority);
void (*requery) (struct pcmcia_socket *s);
int (*suspend) (struct pcmcia_socket *s);
int (*resume) (struct pcmcia_socket *s);
};
int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c);
......
......@@ -920,6 +920,78 @@ static struct device_attribute pcmcia_dev_attrs[] = {
__ATTR_NULL,
};
/* PM support, also needed for reset */
static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
struct pcmcia_driver *p_drv = NULL;
if (dev->driver)
p_drv = to_pcmcia_drv(dev->driver);
if (p_drv && p_drv->suspend)
return p_drv->suspend(p_dev);
return 0;
}
static int pcmcia_dev_resume(struct device * dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
struct pcmcia_driver *p_drv = NULL;
if (dev->driver)
p_drv = to_pcmcia_drv(dev->driver);
if (p_drv && p_drv->resume)
return p_drv->resume(p_dev);
return 0;
}
static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
{
struct pcmcia_socket *skt = _data;
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (p_dev->socket != skt)
return 0;
return dpm_runtime_suspend(dev, PMSG_SUSPEND);
}
static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
{
struct pcmcia_socket *skt = _data;
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
if (p_dev->socket != skt)
return 0;
dpm_runtime_resume(dev);
return 0;
}
static int pcmcia_bus_resume(struct pcmcia_socket *skt)
{
bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
return 0;
}
static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
{
if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
pcmcia_bus_suspend_callback)) {
pcmcia_bus_resume(skt);
return -EIO;
}
return 0;
}
/*======================================================================
......@@ -951,16 +1023,6 @@ static int send_event_callback(struct device *dev, void * _data)
if (p_dev->state & (CLIENT_UNBOUND|CLIENT_STALE))
return 0;
if ((data->event == CS_EVENT_PM_SUSPEND) ||
(data->event == CS_EVENT_RESET_PHYSICAL)) {
if (p_drv->suspend)
return p_drv->suspend(p_dev);
} else if ((data->event == CS_EVENT_PM_RESUME) ||
(data->event == CS_EVENT_CARD_RESET)) {
if (p_drv->resume)
return p_drv->resume(p_dev);
}
if (p_drv->event)
return p_drv->event(data->event, data->priority,
&p_dev->event_callback_args);
......@@ -1012,6 +1074,13 @@ static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
ret = send_event(skt, event, priority);
break;
case CS_EVENT_PM_SUSPEND:
case CS_EVENT_PM_RESUME:
case CS_EVENT_RESET_PHYSICAL:
case CS_EVENT_CARD_RESET:
handle_event(skt, event);
break;
default:
handle_event(skt, event);
send_event(skt, event, priority);
......@@ -1166,10 +1235,13 @@ int pcmcia_deregister_client(struct pcmcia_device *p_dev)
} /* deregister_client */
EXPORT_SYMBOL(pcmcia_deregister_client);
static struct pcmcia_callback pcmcia_bus_callback = {
.owner = THIS_MODULE,
.event = ds_event,
.requery = pcmcia_bus_rescan,
.suspend = pcmcia_bus_suspend,
.resume = pcmcia_bus_resume,
};
static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev,
......@@ -1238,6 +1310,8 @@ struct bus_type pcmcia_bus_type = {
.uevent = pcmcia_bus_uevent,
.match = pcmcia_bus_match,
.dev_attrs = pcmcia_dev_attrs,
.suspend = pcmcia_dev_suspend,
.resume = pcmcia_dev_resume,
};
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment