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Add 'discover' hook for drivers

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Drivers can now offer a discover function, and are expected to offer the
device devtype during discovery, without accessing the USB device. Hmm.
Maybe we'll have to change that later...
This commit is contained in:
Daniel Drake 2007-10-30 22:15:45 +00:00
parent f0ef386f43
commit cc3e976042
2 changed files with 30 additions and 8 deletions
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36
libfprint/core.c
View file

@ -121,6 +121,32 @@ static struct fp_driver *find_supporting_driver(struct usb_device *udev,
return NULL;
}
static struct fp_dscv_dev *discover_dev(struct usb_device *udev)
{
struct usb_id *usb_id;
struct fp_driver *drv = find_supporting_driver(udev, &usb_id);
struct fp_dscv_dev *ddev;
uint32_t devtype = 0;
if (!drv)
return NULL;
if (drv->discover) {
int r = drv->discover(usb_id, &devtype);
if (r < 0)
fp_err("%s discover failed, code %d", drv->name, r);
if (r <= 0)
return NULL;
}
ddev = g_malloc0(sizeof(*ddev));
ddev->drv = drv;
ddev->udev = udev;
ddev->driver_data = usb_id->driver_data;
ddev->devtype = devtype;
return ddev;
}
API_EXPORTED struct fp_dscv_dev **fp_discover_devs(void)
{
GList *tmplist = NULL;
@ -142,15 +168,9 @@ API_EXPORTED struct fp_dscv_dev **fp_discover_devs(void)
* sets of drivers against small sets of USB devices */
for (bus = usb_get_busses(); bus; bus = bus->next)
for (udev = bus->devices; udev; udev = udev->next) {
unsigned long driver_data;
struct fp_driver *drv = find_supporting_driver(udev, &driver_data);
struct fp_dscv_dev *ddev;
if (!drv)
struct fp_dscv_dev *ddev = discover_dev(udev);
if (!ddev)
continue;
ddev = g_malloc0(sizeof(*ddev));
ddev->drv = drv;
ddev->udev = udev;
ddev->driver_data = driver_data;
tmplist = g_list_prepend(tmplist, (gpointer) ddev);
dscv_count++;
}

2
libfprint/fp_internal.h
View file

@ -103,6 +103,7 @@ struct fp_driver {
void *priv;
/* Device operations */
int (*discover)(struct usb_id *usb_id, uint32_t *devtype);
int (*init)(struct fp_dev *dev, unsigned long driver_data);
void (*exit)(struct fp_dev *dev);
int (*enroll)(struct fp_dev *dev, gboolean initial, int stage,
@ -141,6 +142,7 @@ struct fp_dscv_dev {
struct usb_device *udev;
struct fp_driver *drv;
unsigned long driver_data;
uint32_t devtype;
};
enum fp_print_data_type {