From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/media/usb/dvb-usb/dvb-usb-remote.c | 397 +++++++++++++++++++++++++++++ 1 file changed, 397 insertions(+) create mode 100644 drivers/media/usb/dvb-usb/dvb-usb-remote.c (limited to 'drivers/media/usb/dvb-usb/dvb-usb-remote.c') 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 0000000000..65e2c9e2cd --- /dev/null +++ b/drivers/media/usb/dvb-usb/dvb-usb-remote.c @@ -0,0 +1,397 @@ +// SPDX-License-Identifier: GPL-2.0 +/* dvb-usb-remote.c is part of the DVB USB library. + * + * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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 + +static unsigned int +legacy_dvb_usb_get_keymap_index(const struct input_keymap_entry *ke, + struct rc_map_table *keymap, + unsigned int keymap_size) +{ + unsigned int index; + unsigned int scancode; + + if (ke->flags & INPUT_KEYMAP_BY_INDEX) { + index = ke->index; + } else { + if (input_scancode_to_scalar(ke, &scancode)) + return keymap_size; + + /* See if we can match the raw key code. */ + for (index = 0; index < keymap_size; index++) + if (keymap[index].scancode == scancode) + break; + + /* See if there is an unused hole in the map */ + if (index >= keymap_size) { + for (index = 0; index < keymap_size; index++) { + if (keymap[index].keycode == KEY_RESERVED || + keymap[index].keycode == KEY_UNKNOWN) { + break; + } + } + } + } + + return index; +} + +static int legacy_dvb_usb_getkeycode(struct input_dev *dev, + struct input_keymap_entry *ke) +{ + struct dvb_usb_device *d = input_get_drvdata(dev); + struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; + unsigned int keymap_size = d->props.rc.legacy.rc_map_size; + unsigned int index; + + index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size); + if (index >= keymap_size) + return -EINVAL; + + ke->keycode = keymap[index].keycode; + if (ke->keycode == KEY_UNKNOWN) + ke->keycode = KEY_RESERVED; + ke->len = sizeof(keymap[index].scancode); + memcpy(&ke->scancode, &keymap[index].scancode, ke->len); + ke->index = index; + + return 0; +} + +static int legacy_dvb_usb_setkeycode(struct input_dev *dev, + const struct input_keymap_entry *ke, + unsigned int *old_keycode) +{ + struct dvb_usb_device *d = input_get_drvdata(dev); + struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; + unsigned int keymap_size = d->props.rc.legacy.rc_map_size; + unsigned int index; + + index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size); + /* + * FIXME: Currently, it is not possible to increase the size of + * scancode table. For it to happen, one possibility + * would be to allocate a table with key_map_size + 1, + * copying data, appending the new key on it, and freeing + * the old one - or maybe just allocating some spare space + */ + if (index >= keymap_size) + return -EINVAL; + + *old_keycode = keymap[index].keycode; + keymap->keycode = ke->keycode; + __set_bit(ke->keycode, dev->keybit); + + if (*old_keycode != KEY_RESERVED) { + __clear_bit(*old_keycode, dev->keybit); + for (index = 0; index < keymap_size; index++) { + if (keymap[index].keycode == *old_keycode) { + __set_bit(*old_keycode, dev->keybit); + break; + } + } + } + + return 0; +} + +/* 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 legacy_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); + u32 event; + int state; + + /* 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 */ + if (dvb_usb_disable_rc_polling) + return; + + if (d->props.rc.legacy.rc_query(d,&event,&state)) { + err("error while querying for an remote control event."); + goto schedule; + } + + + switch (state) { + case REMOTE_NO_KEY_PRESSED: + break; + case REMOTE_KEY_PRESSED: + deb_rc("key pressed\n"); + d->last_event = event; + input_event(d->input_dev, EV_KEY, event, 1); + input_sync(d->input_dev); + input_event(d->input_dev, EV_KEY, d->last_event, 0); + input_sync(d->input_dev); + break; + case REMOTE_KEY_REPEAT: + deb_rc("key repeated\n"); + input_event(d->input_dev, EV_KEY, event, 1); + input_sync(d->input_dev); + input_event(d->input_dev, EV_KEY, d->last_event, 0); + input_sync(d->input_dev); + break; + default: + break; + } + +/* improved repeat handling ??? + switch (state) { + case REMOTE_NO_KEY_PRESSED: + deb_rc("NO KEY PRESSED\n"); + if (d->last_state != REMOTE_NO_KEY_PRESSED) { + deb_rc("releasing event %d\n",d->last_event); + input_event(d->rc_input_dev, EV_KEY, d->last_event, 0); + input_sync(d->rc_input_dev); + } + d->last_state = REMOTE_NO_KEY_PRESSED; + d->last_event = 0; + break; + case REMOTE_KEY_PRESSED: + deb_rc("KEY PRESSED\n"); + deb_rc("pressing event %d\n",event); + + input_event(d->rc_input_dev, EV_KEY, event, 1); + input_sync(d->rc_input_dev); + + d->last_event = event; + d->last_state = REMOTE_KEY_PRESSED; + break; + case REMOTE_KEY_REPEAT: + deb_rc("KEY_REPEAT\n"); + if (d->last_state != REMOTE_NO_KEY_PRESSED) { + deb_rc("repeating event %d\n",d->last_event); + input_event(d->rc_input_dev, EV_KEY, d->last_event, 2); + input_sync(d->rc_input_dev); + d->last_state = REMOTE_KEY_REPEAT; + } + default: + break; + } +*/ + +schedule: + schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc.legacy.rc_interval)); +} + +static int legacy_dvb_usb_remote_init(struct dvb_usb_device *d) +{ + int i, err, rc_interval; + struct input_dev *input_dev; + + input_dev = input_allocate_device(); + if (!input_dev) + return -ENOMEM; + + input_dev->evbit[0] = BIT_MASK(EV_KEY); + input_dev->name = "IR-receiver inside an USB DVB receiver"; + input_dev->phys = d->rc_phys; + usb_to_input_id(d->udev, &input_dev->id); + input_dev->dev.parent = &d->udev->dev; + d->input_dev = input_dev; + d->rc_dev = NULL; + + input_dev->getkeycode = legacy_dvb_usb_getkeycode; + input_dev->setkeycode = legacy_dvb_usb_setkeycode; + + /* set the bits for the keys */ + deb_rc("key map size: %d\n", d->props.rc.legacy.rc_map_size); + for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) { + deb_rc("setting bit for event %d item %d\n", + d->props.rc.legacy.rc_map_table[i].keycode, i); + set_bit(d->props.rc.legacy.rc_map_table[i].keycode, input_dev->keybit); + } + + /* setting these two values to non-zero, we have to manage key repeats */ + input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval; + input_dev->rep[REP_DELAY] = d->props.rc.legacy.rc_interval + 150; + + input_set_drvdata(input_dev, d); + + err = input_register_device(input_dev); + if (err) + input_free_device(input_dev); + + rc_interval = d->props.rc.legacy.rc_interval; + + INIT_DELAYED_WORK(&d->rc_query_work, legacy_dvb_usb_read_remote_control); + + info("schedule remote query interval to %d msecs.", rc_interval); + schedule_delayed_work(&d->rc_query_work, + msecs_to_jiffies(rc_interval)); + + d->state |= DVB_USB_STATE_REMOTE; + + return err; +} + +/* 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 err; + + /* 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_usb_disable_rc_polling || d->props.rc.core.bulk_mode) + return; + + err = d->props.rc.core.rc_query(d); + if (err) + err("error %d while querying for an remote control event.", err); + + schedule_delayed_work(&d->rc_query_work, + msecs_to_jiffies(d->props.rc.core.rc_interval)); +} + +static int rc_core_dvb_usb_remote_init(struct dvb_usb_device *d) +{ + int err, rc_interval; + struct rc_dev *dev; + + dev = rc_allocate_device(d->props.rc.core.driver_type); + if (!dev) + return -ENOMEM; + + dev->driver_name = d->props.rc.core.module_name; + dev->map_name = d->props.rc.core.rc_codes; + dev->change_protocol = d->props.rc.core.change_protocol; + dev->allowed_protocols = d->props.rc.core.allowed_protos; + usb_to_input_id(d->udev, &dev->input_id); + dev->device_name = d->desc->name; + dev->input_phys = d->rc_phys; + dev->dev.parent = &d->udev->dev; + dev->priv = d; + dev->scancode_mask = d->props.rc.core.scancode_mask; + + err = rc_register_device(dev); + if (err < 0) { + rc_free_device(dev); + return err; + } + + d->input_dev = NULL; + d->rc_dev = dev; + + if (!d->props.rc.core.rc_query || d->props.rc.core.bulk_mode) + return 0; + + /* Polling mode - initialize a work queue for handling it */ + INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control); + + rc_interval = d->props.rc.core.rc_interval; + + info("schedule remote query interval to %d msecs.", rc_interval); + schedule_delayed_work(&d->rc_query_work, + msecs_to_jiffies(rc_interval)); + + return 0; +} + +int dvb_usb_remote_init(struct dvb_usb_device *d) +{ + int err; + + if (dvb_usb_disable_rc_polling) + return 0; + + if (d->props.rc.legacy.rc_map_table && d->props.rc.legacy.rc_query) + d->props.rc.mode = DVB_RC_LEGACY; + else if (d->props.rc.core.rc_codes) + d->props.rc.mode = DVB_RC_CORE; + else + return 0; + + usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys)); + strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys)); + + /* Start the remote-control polling. */ + if (d->props.rc.legacy.rc_interval < 40) + d->props.rc.legacy.rc_interval = 100; /* default */ + + if (d->props.rc.mode == DVB_RC_LEGACY) + err = legacy_dvb_usb_remote_init(d); + else + err = rc_core_dvb_usb_remote_init(d); + if (err) + return err; + + d->state |= DVB_USB_STATE_REMOTE; + + return 0; +} + +int dvb_usb_remote_exit(struct dvb_usb_device *d) +{ + if (d->state & DVB_USB_STATE_REMOTE) { + cancel_delayed_work_sync(&d->rc_query_work); + if (d->props.rc.mode == DVB_RC_LEGACY) + input_unregister_device(d->input_dev); + else + rc_unregister_device(d->rc_dev); + } + d->state &= ~DVB_USB_STATE_REMOTE; + return 0; +} + +#define DVB_USB_RC_NEC_EMPTY 0x00 +#define DVB_USB_RC_NEC_KEY_PRESSED 0x01 +#define DVB_USB_RC_NEC_KEY_REPEATED 0x02 +int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d, + u8 keybuf[5], u32 *event, int *state) +{ + int i; + struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table; + *event = 0; + *state = REMOTE_NO_KEY_PRESSED; + switch (keybuf[0]) { + case DVB_USB_RC_NEC_EMPTY: + break; + case DVB_USB_RC_NEC_KEY_PRESSED: + if ((u8) ~keybuf[1] != keybuf[2] || + (u8) ~keybuf[3] != keybuf[4]) { + deb_err("remote control checksum failed.\n"); + break; + } + /* See if we can match the raw key code. */ + for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) + if (rc5_custom(&keymap[i]) == keybuf[1] && + rc5_data(&keymap[i]) == keybuf[3]) { + *event = keymap[i].keycode; + *state = REMOTE_KEY_PRESSED; + return 0; + } + deb_err("key mapping failed - no appropriate key found in keymapping\n"); + break; + case DVB_USB_RC_NEC_KEY_REPEATED: + *state = REMOTE_KEY_REPEAT; + break; + default: + deb_err("unknown type of remote status: %d\n",keybuf[0]); + break; + } + return 0; +} +EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event); -- cgit v1.2.3