diff options
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-core.c | 76 | ||||
| -rw-r--r-- | drivers/hid/hid-generic.c | 68 |
2 files changed, 115 insertions, 29 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index e6d586a22bbd..7297b1d1300c 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -830,31 +830,6 @@ static int hid_scan_report(struct hid_device *hid) break; } - /* fall back to generic driver in case specific driver doesn't exist */ - switch (hid->group) { - case HID_GROUP_MULTITOUCH_WIN_8: - /* fall-through */ - case HID_GROUP_MULTITOUCH: - if (!IS_ENABLED(CONFIG_HID_MULTITOUCH)) - hid->group = HID_GROUP_GENERIC; - break; - case HID_GROUP_SENSOR_HUB: - if (!IS_ENABLED(CONFIG_HID_SENSOR_HUB)) - hid->group = HID_GROUP_GENERIC; - break; - case HID_GROUP_RMI: - if (!IS_ENABLED(CONFIG_HID_RMI)) - hid->group = HID_GROUP_GENERIC; - break; - case HID_GROUP_WACOM: - if (!IS_ENABLED(CONFIG_HID_WACOM)) - hid->group = HID_GROUP_GENERIC; - break; - case HID_GROUP_LOGITECH_DJ_DEVICE: - if (!IS_ENABLED(CONFIG_HID_LOGITECH_DJ)) - hid->group = HID_GROUP_GENERIC; - break; - } vfree(parser); return 0; } @@ -1928,8 +1903,8 @@ static void hid_free_dynids(struct hid_driver *hdrv) spin_unlock(&hdrv->dyn_lock); } -static const struct hid_device_id *hid_match_device(struct hid_device *hdev, - struct hid_driver *hdrv) +const struct hid_device_id *hid_match_device(struct hid_device *hdev, + struct hid_driver *hdrv) { struct hid_dynid *dynid; @@ -1944,6 +1919,7 @@ static const struct hid_device_id *hid_match_device(struct hid_device *hdev, return hid_match_id(hdev, hdrv->id_table); } +EXPORT_SYMBOL_GPL(hid_match_device); static int hid_bus_match(struct device *dev, struct device_driver *drv) { @@ -1973,6 +1949,23 @@ static int hid_device_probe(struct device *dev) goto unlock; } + if (hdrv->match) { + if (!hdrv->match(hdev, hid_ignore_special_drivers)) { + ret = -ENODEV; + goto unlock; + } + } else { + /* + * hid-generic implements .match(), so if + * hid_ignore_special_drivers is set, we can safely + * return. + */ + if (hid_ignore_special_drivers) { + ret = -ENODEV; + goto unlock; + } + } + hdev->driver = hdrv; if (hdrv->probe) { ret = hdrv->probe(hdev, id); @@ -2069,7 +2062,7 @@ static int hid_uevent(struct device *dev, struct kobj_uevent_env *env) return 0; } -static struct bus_type hid_bus_type = { +struct bus_type hid_bus_type = { .name = "hid", .dev_groups = hid_dev_groups, .drv_groups = hid_drv_groups, @@ -2203,6 +2196,29 @@ void hid_destroy_device(struct hid_device *hdev) } EXPORT_SYMBOL_GPL(hid_destroy_device); + +static int __bus_add_driver(struct device_driver *drv, void *data) +{ + struct hid_driver *added_hdrv = data; + struct hid_driver *hdrv = to_hid_driver(drv); + + if (hdrv->bus_add_driver) + hdrv->bus_add_driver(added_hdrv); + + return 0; +} + +static int __bus_removed_driver(struct device_driver *drv, void *data) +{ + struct hid_driver *removed_hdrv = data; + struct hid_driver *hdrv = to_hid_driver(drv); + + if (hdrv->bus_removed_driver) + hdrv->bus_removed_driver(removed_hdrv); + + return 0; +} + int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, const char *mod_name) { @@ -2214,6 +2230,8 @@ int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, INIT_LIST_HEAD(&hdrv->dyn_list); spin_lock_init(&hdrv->dyn_lock); + bus_for_each_drv(&hid_bus_type, NULL, hdrv, __bus_add_driver); + return driver_register(&hdrv->driver); } EXPORT_SYMBOL_GPL(__hid_register_driver); @@ -2222,6 +2240,8 @@ void hid_unregister_driver(struct hid_driver *hdrv) { driver_unregister(&hdrv->driver); hid_free_dynids(hdrv); + + bus_for_each_drv(&hid_bus_type, NULL, hdrv, __bus_removed_driver); } EXPORT_SYMBOL_GPL(hid_unregister_driver); diff --git a/drivers/hid/hid-generic.c b/drivers/hid/hid-generic.c index e288a4a06fe8..3c0a1bf433d7 100644 --- a/drivers/hid/hid-generic.c +++ b/drivers/hid/hid-generic.c @@ -24,8 +24,71 @@ #include <linux/hid.h> +static struct hid_driver hid_generic; + +static int __unmap_hid_generic(struct device *dev, void *data) +{ + struct hid_driver *hdrv = data; + struct hid_device *hdev = to_hid_device(dev); + + /* only unbind matching devices already bound to hid-generic */ + if (hdev->driver != &hid_generic || + hid_match_device(hdev, hdrv) == NULL) + return 0; + + if (dev->parent) /* Needed for USB */ + device_lock(dev->parent); + device_release_driver(dev); + if (dev->parent) + device_unlock(dev->parent); + + return 0; +} + +static void hid_generic_add_driver(struct hid_driver *hdrv) +{ + bus_for_each_dev(&hid_bus_type, NULL, hdrv, __unmap_hid_generic); +} + +static void hid_generic_removed_driver(struct hid_driver *hdrv) +{ + int ret; + + ret = driver_attach(&hid_generic.driver); +} + +static int __check_hid_generic(struct device_driver *drv, void *data) +{ + struct hid_driver *hdrv = to_hid_driver(drv); + struct hid_device *hdev = data; + + if (hdrv == &hid_generic) + return 0; + + return hid_match_device(hdev, hdrv) != NULL; +} + +static bool hid_generic_match(struct hid_device *hdev, + bool ignore_special_driver) +{ + if (ignore_special_driver) + return true; + + if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER) + return false; + + /* + * If any other driver wants the device, leave the device to this other + * driver. + */ + if (bus_for_each_drv(&hid_bus_type, NULL, hdev, __check_hid_generic)) + return false; + + return true; +} + static const struct hid_device_id hid_table[] = { - { HID_DEVICE(HID_BUS_ANY, HID_GROUP_GENERIC, HID_ANY_ID, HID_ANY_ID) }, + { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, HID_ANY_ID, HID_ANY_ID) }, { } }; MODULE_DEVICE_TABLE(hid, hid_table); @@ -33,6 +96,9 @@ MODULE_DEVICE_TABLE(hid, hid_table); static struct hid_driver hid_generic = { .name = "hid-generic", .id_table = hid_table, + .match = hid_generic_match, + .bus_add_driver = hid_generic_add_driver, + .bus_removed_driver = hid_generic_removed_driver, }; module_hid_driver(hid_generic); |