diff options
Diffstat (limited to 'drivers/hid/hid-core.c')
| -rw-r--r-- | drivers/hid/hid-core.c | 126 |
1 files changed, 109 insertions, 17 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 6e040692f1d8..6fd01a692197 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1070,7 +1070,7 @@ static s32 snto32(__u32 value, unsigned n) case 16: return ((__s16)value); case 32: return ((__s32)value); } - return value & (1 << (n - 1)) ? value | (-1 << n) : value; + return value & (1 << (n - 1)) ? value | (~0U << n) : value; } s32 hid_snto32(__u32 value, unsigned n) @@ -1774,6 +1774,94 @@ void hid_disconnect(struct hid_device *hdev) } EXPORT_SYMBOL_GPL(hid_disconnect); +/** + * hid_hw_start - start underlying HW + * @hdev: hid device + * @connect_mask: which outputs to connect, see HID_CONNECT_* + * + * Call this in probe function *after* hid_parse. This will setup HW + * buffers and start the device (if not defeirred to device open). + * hid_hw_stop must be called if this was successful. + */ +int hid_hw_start(struct hid_device *hdev, unsigned int connect_mask) +{ + int error; + + error = hdev->ll_driver->start(hdev); + if (error) + return error; + + if (connect_mask) { + error = hid_connect(hdev, connect_mask); + if (error) { + hdev->ll_driver->stop(hdev); + return error; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(hid_hw_start); + +/** + * hid_hw_stop - stop underlying HW + * @hdev: hid device + * + * This is usually called from remove function or from probe when something + * failed and hid_hw_start was called already. + */ +void hid_hw_stop(struct hid_device *hdev) +{ + hid_disconnect(hdev); + hdev->ll_driver->stop(hdev); +} +EXPORT_SYMBOL_GPL(hid_hw_stop); + +/** + * hid_hw_open - signal underlying HW to start delivering events + * @hdev: hid device + * + * Tell underlying HW to start delivering events from the device. + * This function should be called sometime after successful call + * to hid_hiw_start(). + */ +int hid_hw_open(struct hid_device *hdev) +{ + int ret; + + ret = mutex_lock_killable(&hdev->ll_open_lock); + if (ret) + return ret; + + if (!hdev->ll_open_count++) { + ret = hdev->ll_driver->open(hdev); + if (ret) + hdev->ll_open_count--; + } + + mutex_unlock(&hdev->ll_open_lock); + return ret; +} +EXPORT_SYMBOL_GPL(hid_hw_open); + +/** + * hid_hw_close - signal underlaying HW to stop delivering events + * + * @hdev: hid device + * + * This function indicates that we are not interested in the events + * from this device anymore. Delivery of events may or may not stop, + * depending on the number of users still outstanding. + */ +void hid_hw_close(struct hid_device *hdev) +{ + mutex_lock(&hdev->ll_open_lock); + if (!--hdev->ll_open_count) + hdev->ll_driver->close(hdev); + mutex_unlock(&hdev->ll_open_lock); +} +EXPORT_SYMBOL_GPL(hid_hw_close); + /* * A list of devices for which there is a specialized driver on HID bus. * @@ -1892,6 +1980,8 @@ static const struct hid_device_id hid_have_special_driver[] = { { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) }, { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2) }, { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD) }, + { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) }, + { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) }, #endif #if IS_ENABLED(CONFIG_HID_AUREAL) { HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) }, @@ -1913,9 +2003,8 @@ static const struct hid_device_id hid_have_special_driver[] = { #if IS_ENABLED(CONFIG_HID_CHICONY) { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) }, { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) }, - { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) }, + { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) }, { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) }, - { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_JESS_ZEN_AIO_KBD) }, #endif #if IS_ENABLED(CONFIG_HID_CMEDIA) { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM6533) }, @@ -1984,6 +2073,9 @@ static const struct hid_device_id hid_have_special_driver[] = { #if IS_ENABLED(CONFIG_HID_ICADE) { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) }, #endif +#if IS_ENABLED(CONFIG_HID_ITE) + { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) }, +#endif #if IS_ENABLED(CONFIG_HID_KENSINGTON) { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) }, #endif @@ -2151,6 +2243,9 @@ static const struct hid_device_id hid_have_special_driver[] = { #if IS_ENABLED(CONFIG_HID_PRODIKEYS) { HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS, USB_DEVICE_ID_PRODIKEYS_PCMIDI) }, #endif +#if IS_ENABLED(CONFIG_HID_RETRODE) + { HID_USB_DEVICE(USB_VENDOR_ID_FUTURE_TECHNOLOGY, USB_DEVICE_ID_RETRODE2) }, +#endif #if IS_ENABLED(CONFIG_HID_RMI) { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) }, { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14) }, @@ -2307,7 +2402,7 @@ struct hid_dynid { * Adds a new dynamic hid device ID to this driver, * and causes the driver to probe for all devices again. */ -static ssize_t store_new_id(struct device_driver *drv, const char *buf, +static ssize_t new_id_store(struct device_driver *drv, const char *buf, size_t count) { struct hid_driver *hdrv = to_hid_driver(drv); @@ -2339,7 +2434,13 @@ static ssize_t store_new_id(struct device_driver *drv, const char *buf, return ret ? : count; } -static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id); +static DRIVER_ATTR_WO(new_id); + +static struct attribute *hid_drv_attrs[] = { + &driver_attr_new_id.attr, + NULL, +}; +ATTRIBUTE_GROUPS(hid_drv); static void hid_free_dynids(struct hid_driver *hdrv) { @@ -2503,6 +2604,7 @@ static int hid_uevent(struct device *dev, struct kobj_uevent_env *env) static struct bus_type hid_bus_type = { .name = "hid", .dev_groups = hid_dev_groups, + .drv_groups = hid_drv_groups, .match = hid_bus_match, .probe = hid_device_probe, .remove = hid_device_remove, @@ -2907,6 +3009,7 @@ struct hid_device *hid_allocate_device(void) spin_lock_init(&hdev->debug_list_lock); sema_init(&hdev->driver_lock, 1); sema_init(&hdev->driver_input_lock, 1); + mutex_init(&hdev->ll_open_lock); return hdev; } @@ -2942,8 +3045,6 @@ EXPORT_SYMBOL_GPL(hid_destroy_device); int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, const char *mod_name) { - int ret; - hdrv->driver.name = hdrv->name; hdrv->driver.bus = &hid_bus_type; hdrv->driver.owner = owner; @@ -2952,21 +3053,12 @@ int __hid_register_driver(struct hid_driver *hdrv, struct module *owner, INIT_LIST_HEAD(&hdrv->dyn_list); spin_lock_init(&hdrv->dyn_lock); - ret = driver_register(&hdrv->driver); - if (ret) - return ret; - - ret = driver_create_file(&hdrv->driver, &driver_attr_new_id); - if (ret) - driver_unregister(&hdrv->driver); - - return ret; + return driver_register(&hdrv->driver); } EXPORT_SYMBOL_GPL(__hid_register_driver); void hid_unregister_driver(struct hid_driver *hdrv) { - driver_remove_file(&hdrv->driver, &driver_attr_new_id); driver_unregister(&hdrv->driver); hid_free_dynids(hdrv); } |