diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb/dvb_usb_remote.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb/dvb_usb_remote.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb_usb_remote.c b/drivers/media/usb/dvb-usb/dvb_usb_remote.c new file mode 100644 index 000000000000..f856ab6648c7 --- /dev/null +++ b/drivers/media/usb/dvb-usb/dvb_usb_remote.c @@ -0,0 +1,117 @@ +/* dvb-usb-remote.c is part of the DVB USB library. + * + * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de) + * see dvb-usb-init.c for copyright information. + * + * This file contains functions for initializing the input-device and for + * handling remote-control-queries. + */ +#include "dvb_usb_common.h" +#include <linux/usb/input.h> + +/* Remote-control poll function - called every dib->rc_query_interval ms to see + * whether the remote control has received anything. + * + * TODO: Fix the repeat rate of the input device. + */ +static void dvb_usb_read_remote_control(struct work_struct *work) +{ + struct dvb_usb_device *d = container_of(work, + struct dvb_usb_device, rc_query_work.work); + int ret; + + /* TODO: need a lock here. We can simply skip checking for the remote + control if we're busy. */ + + /* when the parameter has been set to 1 via sysfs while the + * driver was running, or when bulk mode is enabled after IR init + */ + if (dvb_usbv2_disable_rc_polling || d->rc.bulk_mode) + return; + + ret = d->rc.query(d); + if (ret < 0) + pr_err("%s: error %d while querying for an remote control " \ + "event\n", KBUILD_MODNAME, ret); + + schedule_delayed_work(&d->rc_query_work, + msecs_to_jiffies(d->rc.interval)); +} + +int dvb_usbv2_remote_init(struct dvb_usb_device *d) +{ + int ret; + struct rc_dev *dev; + + if (dvb_usbv2_disable_rc_polling || !d->props->get_rc_config) + return 0; + + ret = d->props->get_rc_config(d, &d->rc); + if (ret < 0) + goto err; + + dev = rc_allocate_device(); + if (!dev) { + ret = -ENOMEM; + goto err; + } + + dev->dev.parent = &d->udev->dev; + dev->input_name = "IR-receiver inside an USB DVB receiver"; + usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys)); + strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys)); + dev->input_phys = d->rc_phys; + usb_to_input_id(d->udev, &dev->input_id); + /* TODO: likely RC-core should took const char * */ + dev->driver_name = (char *) d->props->driver_name; + dev->driver_type = d->rc.driver_type; + dev->allowed_protos = d->rc.allowed_protos; + dev->change_protocol = d->rc.change_protocol; + dev->priv = d; + /* select used keymap */ + if (d->rc.map_name) + dev->map_name = d->rc.map_name; + else if (d->rc_map) + dev->map_name = d->rc_map; + else + dev->map_name = RC_MAP_EMPTY; /* keep rc enabled */ + + ret = rc_register_device(dev); + if (ret < 0) { + rc_free_device(dev); + goto err; + } + + d->input_dev = NULL; + d->rc_dev = dev; + + /* start polling if needed */ + if (d->rc.query && !d->rc.bulk_mode) { + /* initialize a work queue for handling polling */ + INIT_DELAYED_WORK(&d->rc_query_work, + dvb_usb_read_remote_control); + pr_info("%s: schedule remote query interval to %d msecs\n", + KBUILD_MODNAME, d->rc.interval); + schedule_delayed_work(&d->rc_query_work, + msecs_to_jiffies(d->rc.interval)); + } + + d->state |= DVB_USB_STATE_REMOTE; + + return 0; +err: + pr_debug("%s: failed=%d\n", __func__, ret); + return ret; +} + +int dvb_usbv2_remote_exit(struct dvb_usb_device *d) +{ + if (d->state & DVB_USB_STATE_REMOTE) { + cancel_delayed_work_sync(&d->rc_query_work); + rc_unregister_device(d->rc_dev); + } + + d->state &= ~DVB_USB_STATE_REMOTE; + + return 0; +} |