summaryrefslogtreecommitdiffstats
path: root/drivers/media/rc/rc-main.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/rc/rc-main.c')
-rw-r--r--drivers/media/rc/rc-main.c248
1 files changed, 171 insertions, 77 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index c144b77eac98..1db8d38fed7c 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1,16 +1,7 @@
-/* rc-main.c - Remote Controller core module
- *
- * Copyright (C) 2009-2010 by Mauro Carvalho Chehab
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+// rc-main.c - Remote Controller core module
+//
+// Copyright (C) 2009-2010 by Mauro Carvalho Chehab
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -29,7 +20,6 @@
/* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
#define IR_TAB_MIN_SIZE 256
#define IR_TAB_MAX_SIZE 8192
-#define RC_DEV_MAX 256
static const struct {
const char *name;
@@ -607,6 +597,7 @@ static void ir_do_keyup(struct rc_dev *dev, bool sync)
return;
IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode);
+ del_timer(&dev->timer_repeat);
input_report_key(dev->input_dev, dev->last_keycode, 0);
led_trigger_event(led_feedback, LED_OFF);
if (sync)
@@ -661,6 +652,31 @@ static void ir_timer_keyup(struct timer_list *t)
}
/**
+ * ir_timer_repeat() - generates a repeat event after a timeout
+ *
+ * @t: a pointer to the struct timer_list
+ *
+ * This routine will generate a soft repeat event every REP_PERIOD
+ * milliseconds.
+ */
+static void ir_timer_repeat(struct timer_list *t)
+{
+ struct rc_dev *dev = from_timer(dev, t, timer_repeat);
+ struct input_dev *input = dev->input_dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->keylock, flags);
+ if (dev->keypressed) {
+ input_event(input, EV_KEY, dev->last_keycode, 2);
+ input_sync(input);
+ if (input->rep[REP_PERIOD])
+ mod_timer(&dev->timer_repeat, jiffies +
+ msecs_to_jiffies(input->rep[REP_PERIOD]));
+ }
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+
+/**
* rc_repeat() - signals that a key is still pressed
* @dev: the struct rc_dev descriptor of the device
*
@@ -672,19 +688,25 @@ void rc_repeat(struct rc_dev *dev)
{
unsigned long flags;
unsigned int timeout = protocols[dev->last_protocol].repeat_period;
+ struct lirc_scancode sc = {
+ .scancode = dev->last_scancode, .rc_proto = dev->last_protocol,
+ .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED,
+ .flags = LIRC_SCANCODE_FLAG_REPEAT |
+ (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0)
+ };
- spin_lock_irqsave(&dev->keylock, flags);
+ ir_lirc_scancode_event(dev, &sc);
- if (!dev->keypressed)
- goto out;
+ spin_lock_irqsave(&dev->keylock, flags);
input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode);
input_sync(dev->input_dev);
- dev->keyup_jiffies = jiffies + msecs_to_jiffies(timeout);
- mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
+ if (dev->keypressed) {
+ dev->keyup_jiffies = jiffies + msecs_to_jiffies(timeout);
+ mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
+ }
-out:
spin_unlock_irqrestore(&dev->keylock, flags);
}
EXPORT_SYMBOL_GPL(rc_repeat);
@@ -707,19 +729,27 @@ static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol,
dev->last_protocol != protocol ||
dev->last_scancode != scancode ||
dev->last_toggle != toggle);
+ struct lirc_scancode sc = {
+ .scancode = scancode, .rc_proto = protocol,
+ .flags = toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0,
+ .keycode = keycode
+ };
+
+ ir_lirc_scancode_event(dev, &sc);
if (new_event && dev->keypressed)
ir_do_keyup(dev, false);
input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);
+ dev->last_protocol = protocol;
+ dev->last_scancode = scancode;
+ dev->last_toggle = toggle;
+ dev->last_keycode = keycode;
+
if (new_event && keycode != KEY_RESERVED) {
/* Register a keypress */
dev->keypressed = true;
- dev->last_protocol = protocol;
- dev->last_scancode = scancode;
- dev->last_toggle = toggle;
- dev->last_keycode = keycode;
IR_dprintk(1, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n",
dev->device_name, keycode, protocol, scancode);
@@ -728,6 +758,22 @@ static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol,
led_trigger_event(led_feedback, LED_FULL);
}
+ /*
+ * For CEC, start sending repeat messages as soon as the first
+ * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD
+ * is non-zero. Otherwise, the input layer will generate repeat
+ * messages.
+ */
+ if (!new_event && keycode != KEY_RESERVED &&
+ dev->allowed_protocols == RC_PROTO_BIT_CEC &&
+ !timer_pending(&dev->timer_repeat) &&
+ dev->input_dev->rep[REP_PERIOD] &&
+ !dev->input_dev->rep[REP_DELAY]) {
+ input_event(dev->input_dev, EV_KEY, keycode, 2);
+ mod_timer(&dev->timer_repeat, jiffies +
+ msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD]));
+ }
+
input_sync(dev->input_dev);
}
@@ -785,6 +831,51 @@ void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol,
EXPORT_SYMBOL_GPL(rc_keydown_notimeout);
/**
+ * rc_validate_scancode() - checks that a scancode is valid for a protocol.
+ * For nec, it should do the opposite of ir_nec_bytes_to_scancode()
+ * @proto: protocol
+ * @scancode: scancode
+ */
+bool rc_validate_scancode(enum rc_proto proto, u32 scancode)
+{
+ switch (proto) {
+ /*
+ * NECX has a 16-bit address; if the lower 8 bits match the upper
+ * 8 bits inverted, then the address would match regular nec.
+ */
+ case RC_PROTO_NECX:
+ if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0)
+ return false;
+ break;
+ /*
+ * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits
+ * of the command match the upper 8 bits inverted, then it would
+ * be either NEC or NECX.
+ */
+ case RC_PROTO_NEC32:
+ if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0)
+ return false;
+ break;
+ /*
+ * If the customer code (top 32-bit) is 0x800f, it is MCE else it
+ * is regular mode-6a 32 bit
+ */
+ case RC_PROTO_RC6_MCE:
+ if ((scancode & 0xffff0000) != 0x800f0000)
+ return false;
+ break;
+ case RC_PROTO_RC6_6A_32:
+ if ((scancode & 0xffff0000) == 0x800f0000)
+ return false;
+ break;
+ default:
+ break;
+ }
+
+ return true;
+}
+
+/**
* rc_validate_filter() - checks that the scancode and mask are valid and
* provides sensible defaults
* @dev: the struct rc_dev descriptor of the device
@@ -803,26 +894,8 @@ static int rc_validate_filter(struct rc_dev *dev,
mask = protocols[protocol].scancode_bits;
- switch (protocol) {
- case RC_PROTO_NECX:
- if ((((s >> 16) ^ ~(s >> 8)) & 0xff) == 0)
- return -EINVAL;
- break;
- case RC_PROTO_NEC32:
- if ((((s >> 24) ^ ~(s >> 16)) & 0xff) == 0)
- return -EINVAL;
- break;
- case RC_PROTO_RC6_MCE:
- if ((s & 0xffff0000) != 0x800f0000)
- return -EINVAL;
- break;
- case RC_PROTO_RC6_6A_32:
- if ((s & 0xffff0000) == 0x800f0000)
- return -EINVAL;
- break;
- default:
- break;
- }
+ if (!rc_validate_scancode(protocol, s))
+ return -EINVAL;
filter->data &= mask;
filter->mask &= mask;
@@ -845,17 +918,20 @@ int rc_open(struct rc_dev *rdev)
mutex_lock(&rdev->lock);
- if (!rdev->users++ && rdev->open != NULL)
- rval = rdev->open(rdev);
+ if (!rdev->registered) {
+ rval = -ENODEV;
+ } else {
+ if (!rdev->users++ && rdev->open)
+ rval = rdev->open(rdev);
- if (rval)
- rdev->users--;
+ if (rval)
+ rdev->users--;
+ }
mutex_unlock(&rdev->lock);
return rval;
}
-EXPORT_SYMBOL_GPL(rc_open);
static int ir_open(struct input_dev *idev)
{
@@ -869,13 +945,12 @@ void rc_close(struct rc_dev *rdev)
if (rdev) {
mutex_lock(&rdev->lock);
- if (!--rdev->users && rdev->close != NULL)
+ if (!--rdev->users && rdev->close && rdev->registered)
rdev->close(rdev);
mutex_unlock(&rdev->lock);
}
}
-EXPORT_SYMBOL_GPL(rc_close);
static void ir_close(struct input_dev *idev)
{
@@ -950,23 +1025,6 @@ struct rc_filter_attribute {
.mask = (_mask), \
}
-static bool lirc_is_present(void)
-{
-#if defined(CONFIG_LIRC_MODULE)
- struct module *lirc;
-
- mutex_lock(&module_mutex);
- lirc = find_module("lirc_dev");
- mutex_unlock(&module_mutex);
-
- return lirc ? true : false;
-#elif defined(CONFIG_LIRC)
- return true;
-#else
- return false;
-#endif
-}
-
/**
* show_protocols() - shows the current IR protocol(s)
* @device: the device descriptor
@@ -1011,8 +1069,10 @@ static ssize_t show_protocols(struct device *device,
allowed &= ~proto_names[i].type;
}
- if (dev->driver_type == RC_DRIVER_IR_RAW && lirc_is_present())
+#ifdef CONFIG_LIRC
+ if (dev->driver_type == RC_DRIVER_IR_RAW)
tmp += sprintf(tmp, "[lirc] ");
+#endif
if (tmp != buf)
tmp--;
@@ -1091,7 +1151,7 @@ static int parse_protocol_change(u64 *protocols, const char *buf)
return count;
}
-static void ir_raw_load_modules(u64 *protocols)
+void ir_raw_load_modules(u64 *protocols)
{
u64 available;
int i, ret;
@@ -1581,6 +1641,7 @@ struct rc_dev *rc_allocate_device(enum rc_driver_type type)
input_set_drvdata(dev->input_dev, dev);
timer_setup(&dev->timer_keyup, ir_timer_keyup, 0);
+ timer_setup(&dev->timer_repeat, ir_timer_repeat, 0);
spin_lock_init(&dev->rc_map.lock);
spin_lock_init(&dev->keylock);
@@ -1714,7 +1775,10 @@ static int rc_setup_rx_device(struct rc_dev *dev)
* to avoid wrong repetition of the keycodes. Note that this must be
* set after the call to input_register_device().
*/
- dev->input_dev->rep[REP_DELAY] = 500;
+ if (dev->allowed_protocols == RC_PROTO_BIT_CEC)
+ dev->input_dev->rep[REP_DELAY] = 0;
+ else
+ dev->input_dev->rep[REP_DELAY] = 500;
/*
* As a repeat event on protocols like RC-5 and NEC take as long as
@@ -1768,8 +1832,7 @@ int rc_register_device(struct rc_dev *dev)
dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp;
dev->sysfs_groups[attr++] = NULL;
- if (dev->driver_type == RC_DRIVER_IR_RAW ||
- dev->driver_type == RC_DRIVER_IR_RAW_TX) {
+ if (dev->driver_type == RC_DRIVER_IR_RAW) {
rc = ir_raw_event_prepare(dev);
if (rc < 0)
goto out_minor;
@@ -1796,19 +1859,30 @@ int rc_register_device(struct rc_dev *dev)
goto out_dev;
}
- if (dev->driver_type == RC_DRIVER_IR_RAW ||
- dev->driver_type == RC_DRIVER_IR_RAW_TX) {
- rc = ir_raw_event_register(dev);
+ /* Ensure that the lirc kfifo is setup before we start the thread */
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC) {
+ rc = ir_lirc_register(dev);
if (rc < 0)
goto out_rx;
}
+ if (dev->driver_type == RC_DRIVER_IR_RAW) {
+ rc = ir_raw_event_register(dev);
+ if (rc < 0)
+ goto out_lirc;
+ }
+
+ dev->registered = true;
+
IR_dprintk(1, "Registered rc%u (driver: %s)\n",
dev->minor,
dev->driver_name ? dev->driver_name : "unknown");
return 0;
+out_lirc:
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
+ ir_lirc_unregister(dev);
out_rx:
rc_free_rx_device(dev);
out_dev:
@@ -1856,12 +1930,24 @@ void rc_unregister_device(struct rc_dev *dev)
return;
del_timer_sync(&dev->timer_keyup);
+ del_timer_sync(&dev->timer_repeat);
if (dev->driver_type == RC_DRIVER_IR_RAW)
ir_raw_event_unregister(dev);
rc_free_rx_device(dev);
+ mutex_lock(&dev->lock);
+ dev->registered = false;
+ mutex_unlock(&dev->lock);
+
+ /*
+ * lirc device should be freed with dev->registered = false, so
+ * that userspace polling will get notified.
+ */
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
+ ir_lirc_unregister(dev);
+
device_del(&dev->dev);
ida_simple_remove(&rc_ida, dev->minor);
@@ -1884,6 +1970,13 @@ static int __init rc_core_init(void)
return rc;
}
+ rc = lirc_dev_init();
+ if (rc) {
+ pr_err("rc_core: unable to init lirc\n");
+ class_unregister(&rc_class);
+ return 0;
+ }
+
led_trigger_register_simple("rc-feedback", &led_feedback);
rc_map_register(&empty_map);
@@ -1892,6 +1985,7 @@ static int __init rc_core_init(void)
static void __exit rc_core_exit(void)
{
+ lirc_dev_exit();
class_unregister(&rc_class);
led_trigger_unregister_simple(led_feedback);
rc_map_unregister(&empty_map);
@@ -1905,4 +1999,4 @@ EXPORT_SYMBOL_GPL(rc_core_debug);
module_param_named(debug, rc_core_debug, int, 0644);
MODULE_AUTHOR("Mauro Carvalho Chehab");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");