398 lines · c
1// SPDX-License-Identifier: GPL-2.02/* dvb-usb-remote.c is part of the DVB USB library.3 *4 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)5 * see dvb-usb-init.c for copyright information.6 *7 * This file contains functions for initializing the input-device and for handling remote-control-queries.8 */9#include "dvb-usb-common.h"10#include <linux/usb/input.h>11 12static unsigned int13legacy_dvb_usb_get_keymap_index(const struct input_keymap_entry *ke,14 struct rc_map_table *keymap,15 unsigned int keymap_size)16{17 unsigned int index;18 unsigned int scancode;19 20 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {21 index = ke->index;22 } else {23 if (input_scancode_to_scalar(ke, &scancode))24 return keymap_size;25 26 /* See if we can match the raw key code. */27 for (index = 0; index < keymap_size; index++)28 if (keymap[index].scancode == scancode)29 break;30 31 /* See if there is an unused hole in the map */32 if (index >= keymap_size) {33 for (index = 0; index < keymap_size; index++) {34 if (keymap[index].keycode == KEY_RESERVED ||35 keymap[index].keycode == KEY_UNKNOWN) {36 break;37 }38 }39 }40 }41 42 return index;43}44 45static int legacy_dvb_usb_getkeycode(struct input_dev *dev,46 struct input_keymap_entry *ke)47{48 struct dvb_usb_device *d = input_get_drvdata(dev);49 struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;50 unsigned int keymap_size = d->props.rc.legacy.rc_map_size;51 unsigned int index;52 53 index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);54 if (index >= keymap_size)55 return -EINVAL;56 57 ke->keycode = keymap[index].keycode;58 if (ke->keycode == KEY_UNKNOWN)59 ke->keycode = KEY_RESERVED;60 ke->len = sizeof(keymap[index].scancode);61 memcpy(&ke->scancode, &keymap[index].scancode, ke->len);62 ke->index = index;63 64 return 0;65}66 67static int legacy_dvb_usb_setkeycode(struct input_dev *dev,68 const struct input_keymap_entry *ke,69 unsigned int *old_keycode)70{71 struct dvb_usb_device *d = input_get_drvdata(dev);72 struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;73 unsigned int keymap_size = d->props.rc.legacy.rc_map_size;74 unsigned int index;75 76 index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);77 /*78 * FIXME: Currently, it is not possible to increase the size of79 * scancode table. For it to happen, one possibility80 * would be to allocate a table with key_map_size + 1,81 * copying data, appending the new key on it, and freeing82 * the old one - or maybe just allocating some spare space83 */84 if (index >= keymap_size)85 return -EINVAL;86 87 *old_keycode = keymap[index].keycode;88 keymap->keycode = ke->keycode;89 __set_bit(ke->keycode, dev->keybit);90 91 if (*old_keycode != KEY_RESERVED) {92 __clear_bit(*old_keycode, dev->keybit);93 for (index = 0; index < keymap_size; index++) {94 if (keymap[index].keycode == *old_keycode) {95 __set_bit(*old_keycode, dev->keybit);96 break;97 }98 }99 }100 101 return 0;102}103 104/* Remote-control poll function - called every dib->rc_query_interval ms to see105 * whether the remote control has received anything.106 *107 * TODO: Fix the repeat rate of the input device.108 */109static void legacy_dvb_usb_read_remote_control(struct work_struct *work)110{111 struct dvb_usb_device *d =112 container_of(work, struct dvb_usb_device, rc_query_work.work);113 u32 event;114 int state;115 116 /* TODO: need a lock here. We can simply skip checking for the remote control117 if we're busy. */118 119 /* when the parameter has been set to 1 via sysfs while the driver was running */120 if (dvb_usb_disable_rc_polling)121 return;122 123 if (d->props.rc.legacy.rc_query(d,&event,&state)) {124 err("error while querying for an remote control event.");125 goto schedule;126 }127 128 129 switch (state) {130 case REMOTE_NO_KEY_PRESSED:131 break;132 case REMOTE_KEY_PRESSED:133 deb_rc("key pressed\n");134 d->last_event = event;135 input_event(d->input_dev, EV_KEY, event, 1);136 input_sync(d->input_dev);137 input_event(d->input_dev, EV_KEY, d->last_event, 0);138 input_sync(d->input_dev);139 break;140 case REMOTE_KEY_REPEAT:141 deb_rc("key repeated\n");142 input_event(d->input_dev, EV_KEY, event, 1);143 input_sync(d->input_dev);144 input_event(d->input_dev, EV_KEY, d->last_event, 0);145 input_sync(d->input_dev);146 break;147 default:148 break;149 }150 151/* improved repeat handling ???152 switch (state) {153 case REMOTE_NO_KEY_PRESSED:154 deb_rc("NO KEY PRESSED\n");155 if (d->last_state != REMOTE_NO_KEY_PRESSED) {156 deb_rc("releasing event %d\n",d->last_event);157 input_event(d->rc_input_dev, EV_KEY, d->last_event, 0);158 input_sync(d->rc_input_dev);159 }160 d->last_state = REMOTE_NO_KEY_PRESSED;161 d->last_event = 0;162 break;163 case REMOTE_KEY_PRESSED:164 deb_rc("KEY PRESSED\n");165 deb_rc("pressing event %d\n",event);166 167 input_event(d->rc_input_dev, EV_KEY, event, 1);168 input_sync(d->rc_input_dev);169 170 d->last_event = event;171 d->last_state = REMOTE_KEY_PRESSED;172 break;173 case REMOTE_KEY_REPEAT:174 deb_rc("KEY_REPEAT\n");175 if (d->last_state != REMOTE_NO_KEY_PRESSED) {176 deb_rc("repeating event %d\n",d->last_event);177 input_event(d->rc_input_dev, EV_KEY, d->last_event, 2);178 input_sync(d->rc_input_dev);179 d->last_state = REMOTE_KEY_REPEAT;180 }181 default:182 break;183 }184*/185 186schedule:187 schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc.legacy.rc_interval));188}189 190static int legacy_dvb_usb_remote_init(struct dvb_usb_device *d)191{192 int i, err, rc_interval;193 struct input_dev *input_dev;194 195 input_dev = input_allocate_device();196 if (!input_dev)197 return -ENOMEM;198 199 input_dev->evbit[0] = BIT_MASK(EV_KEY);200 input_dev->name = "IR-receiver inside an USB DVB receiver";201 input_dev->phys = d->rc_phys;202 usb_to_input_id(d->udev, &input_dev->id);203 input_dev->dev.parent = &d->udev->dev;204 d->input_dev = input_dev;205 d->rc_dev = NULL;206 207 input_dev->getkeycode = legacy_dvb_usb_getkeycode;208 input_dev->setkeycode = legacy_dvb_usb_setkeycode;209 210 /* set the bits for the keys */211 deb_rc("key map size: %d\n", d->props.rc.legacy.rc_map_size);212 for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {213 deb_rc("setting bit for event %d item %d\n",214 d->props.rc.legacy.rc_map_table[i].keycode, i);215 set_bit(d->props.rc.legacy.rc_map_table[i].keycode, input_dev->keybit);216 }217 218 /* setting these two values to non-zero, we have to manage key repeats */219 input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval;220 input_dev->rep[REP_DELAY] = d->props.rc.legacy.rc_interval + 150;221 222 input_set_drvdata(input_dev, d);223 224 err = input_register_device(input_dev);225 if (err)226 input_free_device(input_dev);227 228 rc_interval = d->props.rc.legacy.rc_interval;229 230 INIT_DELAYED_WORK(&d->rc_query_work, legacy_dvb_usb_read_remote_control);231 232 info("schedule remote query interval to %d msecs.", rc_interval);233 schedule_delayed_work(&d->rc_query_work,234 msecs_to_jiffies(rc_interval));235 236 d->state |= DVB_USB_STATE_REMOTE;237 238 return err;239}240 241/* Remote-control poll function - called every dib->rc_query_interval ms to see242 * whether the remote control has received anything.243 *244 * TODO: Fix the repeat rate of the input device.245 */246static void dvb_usb_read_remote_control(struct work_struct *work)247{248 struct dvb_usb_device *d =249 container_of(work, struct dvb_usb_device, rc_query_work.work);250 int err;251 252 /* TODO: need a lock here. We can simply skip checking for the remote control253 if we're busy. */254 255 /* when the parameter has been set to 1 via sysfs while the256 * driver was running, or when bulk mode is enabled after IR init257 */258 if (dvb_usb_disable_rc_polling || d->props.rc.core.bulk_mode)259 return;260 261 err = d->props.rc.core.rc_query(d);262 if (err)263 err("error %d while querying for an remote control event.", err);264 265 schedule_delayed_work(&d->rc_query_work,266 msecs_to_jiffies(d->props.rc.core.rc_interval));267}268 269static int rc_core_dvb_usb_remote_init(struct dvb_usb_device *d)270{271 int err, rc_interval;272 struct rc_dev *dev;273 274 dev = rc_allocate_device(d->props.rc.core.driver_type);275 if (!dev)276 return -ENOMEM;277 278 dev->driver_name = d->props.rc.core.module_name;279 dev->map_name = d->props.rc.core.rc_codes;280 dev->change_protocol = d->props.rc.core.change_protocol;281 dev->allowed_protocols = d->props.rc.core.allowed_protos;282 usb_to_input_id(d->udev, &dev->input_id);283 dev->device_name = d->desc->name;284 dev->input_phys = d->rc_phys;285 dev->dev.parent = &d->udev->dev;286 dev->priv = d;287 dev->scancode_mask = d->props.rc.core.scancode_mask;288 289 err = rc_register_device(dev);290 if (err < 0) {291 rc_free_device(dev);292 return err;293 }294 295 d->input_dev = NULL;296 d->rc_dev = dev;297 298 if (!d->props.rc.core.rc_query || d->props.rc.core.bulk_mode)299 return 0;300 301 /* Polling mode - initialize a work queue for handling it */302 INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control);303 304 rc_interval = d->props.rc.core.rc_interval;305 306 info("schedule remote query interval to %d msecs.", rc_interval);307 schedule_delayed_work(&d->rc_query_work,308 msecs_to_jiffies(rc_interval));309 310 return 0;311}312 313int dvb_usb_remote_init(struct dvb_usb_device *d)314{315 int err;316 317 if (dvb_usb_disable_rc_polling)318 return 0;319 320 if (d->props.rc.legacy.rc_map_table && d->props.rc.legacy.rc_query)321 d->props.rc.mode = DVB_RC_LEGACY;322 else if (d->props.rc.core.rc_codes)323 d->props.rc.mode = DVB_RC_CORE;324 else325 return 0;326 327 usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));328 strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));329 330 /* Start the remote-control polling. */331 if (d->props.rc.legacy.rc_interval < 40)332 d->props.rc.legacy.rc_interval = 100; /* default */333 334 if (d->props.rc.mode == DVB_RC_LEGACY)335 err = legacy_dvb_usb_remote_init(d);336 else337 err = rc_core_dvb_usb_remote_init(d);338 if (err)339 return err;340 341 d->state |= DVB_USB_STATE_REMOTE;342 343 return 0;344}345 346int dvb_usb_remote_exit(struct dvb_usb_device *d)347{348 if (d->state & DVB_USB_STATE_REMOTE) {349 cancel_delayed_work_sync(&d->rc_query_work);350 if (d->props.rc.mode == DVB_RC_LEGACY)351 input_unregister_device(d->input_dev);352 else353 rc_unregister_device(d->rc_dev);354 }355 d->state &= ~DVB_USB_STATE_REMOTE;356 return 0;357}358 359#define DVB_USB_RC_NEC_EMPTY 0x00360#define DVB_USB_RC_NEC_KEY_PRESSED 0x01361#define DVB_USB_RC_NEC_KEY_REPEATED 0x02362int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,363 u8 keybuf[5], u32 *event, int *state)364{365 int i;366 struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;367 *event = 0;368 *state = REMOTE_NO_KEY_PRESSED;369 switch (keybuf[0]) {370 case DVB_USB_RC_NEC_EMPTY:371 break;372 case DVB_USB_RC_NEC_KEY_PRESSED:373 if ((u8) ~keybuf[1] != keybuf[2] ||374 (u8) ~keybuf[3] != keybuf[4]) {375 deb_err("remote control checksum failed.\n");376 break;377 }378 /* See if we can match the raw key code. */379 for (i = 0; i < d->props.rc.legacy.rc_map_size; i++)380 if (rc5_custom(&keymap[i]) == keybuf[1] &&381 rc5_data(&keymap[i]) == keybuf[3]) {382 *event = keymap[i].keycode;383 *state = REMOTE_KEY_PRESSED;384 return 0;385 }386 deb_err("key mapping failed - no appropriate key found in keymapping\n");387 break;388 case DVB_USB_RC_NEC_KEY_REPEATED:389 *state = REMOTE_KEY_REPEAT;390 break;391 default:392 deb_err("unknown type of remote status: %d\n",keybuf[0]);393 break;394 }395 return 0;396}397EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);398