#include <linux/firmware.h>
#include <linux/kref.h>
#include <linux/dma-mapping.h>
+#include <linux/slab.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
static void pcmcia_release_dev(struct device *dev)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+ int i;
dev_dbg(dev, "releasing device\n");
pcmcia_put_socket(p_dev->socket);
+ for (i = 0; i < 4; i++)
+ kfree(p_dev->prod_id[i]);
kfree(p_dev->devname);
kref_put(&p_dev->function_config->ref, pcmcia_release_function);
kfree(p_dev);
}
-static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
-{
- if (!s->pcmcia_state.device_add_pending) {
- dev_dbg(&s->dev, "scheduling to add %s secondary"
- " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
- s->pcmcia_state.device_add_pending = 1;
- s->pcmcia_state.mfc_pfc = mfc;
- schedule_work(&s->device_add);
- }
- return;
-}
static int pcmcia_device_probe(struct device *dev)
{
struct pcmcia_device *p_dev;
struct pcmcia_driver *p_drv;
- struct pcmcia_device_id *did;
struct pcmcia_socket *s;
cistpl_config_t cis_config;
int ret = 0;
p_drv = to_pcmcia_drv(dev->driver);
s = p_dev->socket;
- /* The PCMCIA code passes the match data in via dev_set_drvdata(dev)
- * which is an ugly hack. Once the driver probe is called it may
- * and often will overwrite the match data so we must save it first
- *
- * handle pseudo multifunction devices:
- * there are at most two pseudo multifunction devices.
- * if we're matching against the first, schedule a
- * call which will then check whether there are two
- * pseudo devices, and if not, add the second one.
- */
- did = dev_get_drvdata(&p_dev->dev);
-
dev_dbg(dev, "trying to bind to %s\n", p_drv->drv.name);
if ((!p_drv->probe) || (!p_dev->function_config) ||
}
mutex_lock(&s->ops_mutex);
- if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
+ if ((s->pcmcia_state.has_pfc) &&
(p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
- pcmcia_add_device_later(p_dev->socket, 0);
+ pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
mutex_unlock(&s->ops_mutex);
put_module:
mutex_lock(&s->ops_mutex);
list_del(&p_dev->socket_device_list);
- p_dev->_removed = 1;
mutex_unlock(&s->ops_mutex);
dev_dbg(&p_dev->dev, "unregistering device\n");
{
struct pcmcia_device *p_dev;
struct pcmcia_driver *p_drv;
- struct pcmcia_device_id *did;
int i;
p_dev = to_pcmcia_dev(dev);
* pseudo multi-function card, we need to unbind
* all devices
*/
- did = dev_get_drvdata(&p_dev->dev);
- if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
+ if ((p_dev->socket->pcmcia_state.has_pfc) &&
(p_dev->socket->device_count > 0) &&
(p_dev->device_no == 0))
pcmcia_card_remove(p_dev->socket, p_dev);
for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) {
char *tmp;
unsigned int length;
+ char *new;
tmp = vers1->str + vers1->ofs[i];
if ((length < 2) || (length > 255))
continue;
- p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
- GFP_KERNEL);
- if (!p_dev->prod_id[i])
+ new = kmalloc(sizeof(char) * length, GFP_KERNEL);
+ if (!new)
continue;
- p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
- tmp, length);
+ new = strncpy(new, tmp, length);
+
+ tmp = p_dev->prod_id[i];
+ p_dev->prod_id[i] = new;
+ kfree(tmp);
}
mutex_unlock(&p_dev->socket->ops_mutex);
}
struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
{
struct pcmcia_device *p_dev, *tmp_dev;
+ int i;
s = pcmcia_get_socket(s);
if (!s)
p_dev->device_no = (s->device_count++);
mutex_unlock(&s->ops_mutex);
- /* max of 4 devices per card */
+ /* max of 2 PFC devices */
+ if ((p_dev->device_no >= 2) && (function == 0))
+ goto err_free;
+
+ /* max of 4 devices overall */
if (p_dev->device_no >= 4)
goto err_free;
s->device_count--;
mutex_unlock(&s->ops_mutex);
+ for (i = 0; i < 4; i++)
+ kfree(p_dev->prod_id[i]);
kfree(p_dev->devname);
kfree(p_dev);
err_put:
}
-static void pcmcia_delayed_add_device(struct work_struct *work)
-{
- struct pcmcia_socket *s =
- container_of(work, struct pcmcia_socket, device_add);
- u8 mfc_pfc;
-
- mutex_lock(&s->ops_mutex);
- mfc_pfc = s->pcmcia_state.mfc_pfc;
- s->pcmcia_state.device_add_pending = 0;
- s->pcmcia_state.mfc_pfc = 0;
- mutex_unlock(&s->ops_mutex);
-
- dev_dbg(&s->dev, "adding additional device to %d\n", s->sock);
- pcmcia_device_add(s, mfc_pfc);
-}
-
static int pcmcia_requery_callback(struct device *dev, void * _data)
{
struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
return 0;
}
+
static void pcmcia_requery(struct pcmcia_socket *s)
{
- int present;
-
- mutex_lock(&s->ops_mutex);
- present = s->pcmcia_state.present;
- mutex_unlock(&s->ops_mutex);
-
- if (!present)
- return;
+ int has_pfc;
if (s->functions == 0) {
pcmcia_card_add(s);
new_funcs = mfc.nfn;
else
new_funcs = 1;
- if (old_funcs > new_funcs) {
+ if (old_funcs != new_funcs) {
+ /* we need to re-start */
pcmcia_card_remove(s, NULL);
pcmcia_card_add(s);
- } else if (new_funcs > old_funcs) {
- s->functions = new_funcs;
- pcmcia_device_add(s, 1);
}
}
+ /* If the PCMCIA device consists of two pseudo devices,
+ * call pcmcia_device_add() -- which will fail if both
+ * devices are already registered. */
+ mutex_lock(&s->ops_mutex);
+ has_pfc = s->pcmcia_state.has_pfc;
+ mutex_unlock(&s->ops_mutex);
+ if (has_pfc)
+ pcmcia_device_add(s, 0);
+
/* we re-scan all devices, not just the ones connected to this
* socket. This does not matter, though. */
if (bus_rescan_devices(&pcmcia_bus_type))
struct pcmcia_socket *s = dev->socket;
const struct firmware *fw;
int ret = -ENOMEM;
- int no_funcs;
- int old_funcs;
cistpl_longlink_mfc_t mfc;
+ int old_funcs, new_funcs = 1;
if (!filename)
return -EINVAL;
goto release;
}
+ /* we need to re-start if the number of functions changed */
+ old_funcs = s->functions;
+ if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC,
+ &mfc))
+ new_funcs = mfc.nfn;
+
+ if (old_funcs != new_funcs)
+ ret = -EBUSY;
/* update information */
pcmcia_device_query(dev);
- /* does this cis override add or remove functions? */
- old_funcs = s->functions;
-
- if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
- no_funcs = mfc.nfn;
- else
- no_funcs = 1;
- s->functions = no_funcs;
-
- if (old_funcs > no_funcs)
- pcmcia_card_remove(s, dev);
- else if (no_funcs > old_funcs) {
- mutex_lock(&s->ops_mutex);
- pcmcia_add_device_later(s, 1);
- mutex_unlock(&s->ops_mutex);
- }
+ /* requery (as number of functions might have changed) */
+ pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
}
release:
release_firmware(fw);
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
+ dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n");
+ mutex_lock(&dev->socket->ops_mutex);
+ dev->socket->pcmcia_state.has_pfc = 1;
+ mutex_unlock(&dev->socket->ops_mutex);
if (dev->device_no != did->device_no)
return 0;
}
/* if this is a pseudo-multi-function device,
* we need explicit matches */
- if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
+ if (dev->socket->pcmcia_state.has_pfc)
return 0;
if (dev->device_no)
return 0;
if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
dev_dbg(&dev->dev, "device needs a fake CIS\n");
if (!dev->socket->fake_cis)
- pcmcia_load_firmware(dev, did->cisfile);
-
- if (!dev->socket->fake_cis)
- return 0;
+ if (pcmcia_load_firmware(dev, did->cisfile))
+ return 0;
}
if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
return 0;
}
- dev_set_drvdata(&dev->dev, did);
-
return 1;
}
{
int rc;
- down(&dev->sem);
+ device_lock(dev);
rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
- up(&dev->sem);
+ device_unlock(dev);
return rc;
}
{
int rc;
- down(&dev->sem);
+ device_lock(dev);
rc = pcmcia_dev_resume(dev);
- up(&dev->sem);
+ device_unlock(dev);
return rc;
}
switch (event) {
case CS_EVENT_CARD_REMOVAL:
- mutex_lock(&s->ops_mutex);
- s->pcmcia_state.present = 0;
- mutex_unlock(&s->ops_mutex);
+ atomic_set(&skt->present, 0);
pcmcia_card_remove(skt, NULL);
handle_event(skt, event);
mutex_lock(&s->ops_mutex);
break;
case CS_EVENT_CARD_INSERTION:
+ atomic_set(&skt->present, 1);
mutex_lock(&s->ops_mutex);
- s->pcmcia_state.present = 1;
+ s->pcmcia_state.has_pfc = 0;
destroy_cis_cache(s); /* to be on the safe side... */
mutex_unlock(&s->ops_mutex);
pcmcia_card_add(skt);
return 0;
} /* ds_event */
-
+/*
+ * NOTE: This is racy. There's no guarantee the card will still be
+ * physically present, even if the call to this function returns
+ * non-NULL. Furthermore, the device driver most likely is unbound
+ * almost immediately, so the timeframe where pcmcia_dev_present
+ * returns NULL is probably really really small.
+ */
struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev)
{
struct pcmcia_device *p_dev;
if (!p_dev)
return NULL;
- mutex_lock(&p_dev->socket->ops_mutex);
- if (!p_dev->socket->pcmcia_state.present)
- goto out;
-
- if (p_dev->socket->pcmcia_state.dead)
- goto out;
+ if (atomic_read(&p_dev->socket->present) != 0)
+ ret = p_dev;
- if (p_dev->_removed)
- goto out;
-
- if (p_dev->suspended)
- goto out;
-
- ret = p_dev;
- out:
- mutex_unlock(&p_dev->socket->ops_mutex);
pcmcia_put_dev(p_dev);
return ret;
}
return -ENODEV;
}
- /*
- * Ugly. But we want to wait for the socket threads to have started up.
- * We really should let the drivers themselves drive some of this..
- */
- msleep(250);
-
ret = sysfs_create_bin_file(&dev->kobj, &pccard_cis_attr);
if (ret) {
dev_printk(KERN_ERR, dev, "PCMCIA registration failed\n");
init_waitqueue_head(&socket->queue);
#endif
INIT_LIST_HEAD(&socket->devices_list);
- INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
memset(&socket->pcmcia_state, 0, sizeof(u8));
socket->device_count = 0;
return ret;
}
+ atomic_set(&socket->present, 0);
+
return 0;
}
if (!socket)
return;
- mutex_lock(&socket->ops_mutex);
- socket->pcmcia_state.dead = 1;
- mutex_unlock(&socket->ops_mutex);
-
pccard_register_pcmcia(socket, NULL);
/* unregister any unbound devices */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff