The attached patch rewrites the keyup/keydown logic in drivers/media/IR/ir-keytable.c. (applies to http://git.linuxtv.org/mchehab/ir.git) All knowledge of keystates etc is now internal to ir-keytable.c and not scattered around ir-raw-event.c and ir-nec-decoder.c (where it doesn't belong). In addition, I've changed the API slightly so that ir_input_dev is passed as the first argument rather than input_dev. If we're ever going to support multiple keytables we need to move towards making ir_input_dev the main interface from a driver POV and obscure away the input_dev as an implementational detail in ir-core. Mauro, once this patch is merged I'll start working on patches to migrate drivers which use ir_input_* in ir-functions.c over to the ir-keytable.c code instead. Signed-off-by: David Härdeman <david@xxxxxxxxxxx> --- drivers/media/IR/ir-keytable.c | 127 +++++++++++++++++++++++++++++-------- drivers/media/IR/ir-nec-decoder.c | 7 +-- drivers/media/IR/ir-raw-event.c | 14 ---- include/media/ir-core.h | 15 +++-- 4 files changed, 112 insertions(+), 51 deletions(-) diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c index 6b0d13e..e1fd20b 100644 --- a/drivers/media/IR/ir-keytable.c +++ b/drivers/media/IR/ir-keytable.c @@ -19,6 +19,9 @@ #define IR_TAB_MIN_SIZE 32 #define IR_TAB_MAX_SIZE 1024 +/* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ +#define IR_KEYPRESS_TIMEOUT 250 + /** * ir_seek_table() - returns the element order on the table * @rc_tab: the ir_scancode_table with the keymap to be used @@ -392,56 +395,122 @@ EXPORT_SYMBOL_GPL(ir_g_keycode_from_table); /** * ir_keyup() - generates input event to cleanup a key press - * @input_dev: the struct input_dev descriptor of the device + * @ir: the struct ir_input_dev descriptor of the device * - * This routine is used by the input routines when a key is pressed at the - * IR. It reports a keyup input event via input_report_key(). + * This routine is used to signal that a key has been released on the + * remote control. It reports a keyup input event via input_report_key(). */ -void ir_keyup(struct input_dev *dev) +static void ir_keyup(struct ir_input_dev *ir) { - struct ir_input_dev *ir = input_get_drvdata(dev); - if (!ir->keypressed) return; - IR_dprintk(1, "keyup key 0x%04x\n", ir->keycode); - input_report_key(dev, ir->keycode, 0); - input_sync(dev); - ir->keypressed = 0; + IR_dprintk(1, "keyup key 0x%04x\n", ir->last_keycode); + input_report_key(ir->input_dev, ir->last_keycode, 0); + input_sync(ir->input_dev); + ir->keypressed = false; } -EXPORT_SYMBOL_GPL(ir_keyup); + +/** + * ir_timer_keyup() - generates a keyup event after a timeout + * @cookie: a pointer to struct ir_input_dev passed to setup_timer() + * + * This routine will generate a keyup event some time after a keydown event + * is generated when no further activity has been detected. + */ +static void ir_timer_keyup(unsigned long cookie) +{ + struct ir_input_dev *ir = (struct ir_input_dev *)cookie; + unsigned long flags; + + /* + * ir->keyup_jiffies is used to prevent a race condition if a + * hardware interrupt occurs at this point and the keyup timer + * event is moved further into the future as a result. + * + * The timer will then be reactivated and this function called + * again in the future. We need to exit gracefully in that case + * to allow the input subsystem to do its auto-repeat magic or + * a keyup event might follow immediately after the keydown. + */ + spin_lock_irqsave(&ir->keylock, flags); + if (time_is_after_eq_jiffies(ir->keyup_jiffies)) + ir_keyup(ir); + spin_unlock_irqrestore(&ir->keylock, flags); +} + +/** + * ir_repeat() - notifies the IR core that a key is still pressed + * @ir: the struct ir_input_dev descriptor of the device + * + * This routine is used by IR decoders when a repeat message which does + * not include the necessary bits to reproduce the scancode has been + * received. + */ +void ir_repeat(struct ir_input_dev *ir) +{ + unsigned long flags; + + spin_lock_irqsave(&ir->keylock, flags); + + if (!ir->keypressed) + goto out; + + ir->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); + mod_timer(&ir->timer_keyup, ir->keyup_jiffies); + +out: + spin_unlock_irqrestore(&ir->keylock, flags); +} +EXPORT_SYMBOL_GPL(ir_repeat); /** * ir_keydown() - generates input event for a key press - * @input_dev: the struct input_dev descriptor of the device + * @ir: the struct ir_input_dev descriptor of the device * @scancode: the scancode that we're seeking + * @toggle: the toggle value (protocol dependent, if the protocol doesn't + * support toggle values, this should be set to zero) * * This routine is used by the input routines when a key is pressed at the * IR. It gets the keycode for a scancode and reports an input event via * input_report_key(). */ -void ir_keydown(struct input_dev *dev, int scancode) +void ir_keydown(struct ir_input_dev *ir, int scancode, u8 toggle) { - struct ir_input_dev *ir = input_get_drvdata(dev); + unsigned long flags; - u32 keycode = ir_g_keycode_from_table(dev, scancode); + u32 keycode = ir_g_keycode_from_table(ir->input_dev, scancode); - /* If already sent a keydown, do a keyup */ - if (ir->keypressed) - ir_keyup(dev); + spin_lock_irqsave(&ir->keylock, flags); - if (KEY_RESERVED == keycode) - return; + /* Repeat event? */ + if (ir->keypressed && + ir->last_scancode == scancode && + ir->last_toggle == toggle) + goto set_timer; - ir->keycode = keycode; - ir->keypressed = 1; + /* Optionally, release an old keypress */ + ir_keyup(ir); - IR_dprintk(1, "%s: key down event, key 0x%04x, scancode 0x%04x\n", - dev->name, keycode, scancode); + ir->last_scancode = scancode; + ir->last_toggle = toggle; + ir->last_keycode = keycode; - input_report_key(dev, ir->keycode, 1); - input_sync(dev); + if (keycode == KEY_RESERVED) + goto out; + /* Register a keypress */ + ir->keypressed = true; + IR_dprintk(1, "%s: key down event, key 0x%04x, scancode 0x%04x\n", + ir->input_dev->name, keycode, scancode); + input_report_key(ir->input_dev, ir->last_keycode, 1); + input_sync(ir->input_dev); + +set_timer: + ir->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); + mod_timer(&ir->timer_keyup, ir->keyup_jiffies); +out: + spin_unlock_irqrestore(&ir->keylock, flags); } EXPORT_SYMBOL_GPL(ir_keydown); @@ -487,7 +556,10 @@ int ir_input_register(struct input_dev *input_dev, return -ENOMEM; spin_lock_init(&ir_dev->rc_tab.lock); + spin_lock_init(&ir_dev->keylock); + setup_timer(&ir_dev->timer_keyup, ir_timer_keyup, (unsigned long)ir_dev); + ir_dev->input_dev = input_dev; ir_dev->driver_name = kmalloc(strlen(driver_name) + 1, GFP_KERNEL); if (!ir_dev->driver_name) return -ENOMEM; @@ -522,6 +594,7 @@ int ir_input_register(struct input_dev *input_dev, clear_bit(0, input_dev->keybit); set_bit(EV_KEY, input_dev->evbit); + set_bit(EV_REP, input_dev->evbit); input_dev->getkeycode = ir_getkeycode; input_dev->setkeycode = ir_setkeycode; @@ -555,7 +628,7 @@ void ir_input_unregister(struct input_dev *dev) return; IR_dprintk(1, "Freed keycode table\n"); - + del_timer_sync(&ir_dev->timer_keyup); rc_tab = &ir_dev->rc_tab; rc_tab->size = 0; kfree(rc_tab->scan); diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c index c0579d3..69c2388 100644 --- a/drivers/media/IR/ir-nec-decoder.c +++ b/drivers/media/IR/ir-nec-decoder.c @@ -179,8 +179,7 @@ static int __ir_nec_decode(struct input_dev *input_dev, if (is_repeat(evs, len, *pos)) { *pos += 2; if (ir->keypressed) { - mod_timer(&ir->raw->timer_keyup, - jiffies + msecs_to_jiffies(REPEAT_TIME)); + ir_repeat(ir); IR_dprintk(1, "NEC repeat event\n"); return 1; } else { @@ -237,9 +236,7 @@ static int __ir_nec_decode(struct input_dev *input_dev, } IR_dprintk(1, "NEC scancode 0x%04x\n", ircode); - ir_keydown(input_dev, ircode); - mod_timer(&ir->raw->timer_keyup, - jiffies + msecs_to_jiffies(REPEAT_TIME)); + ir_keydown(ir, ircode, 0); return 1; err: diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c index 1f72223..e539455 100644 --- a/drivers/media/IR/ir-raw-event.c +++ b/drivers/media/IR/ir-raw-event.c @@ -53,13 +53,6 @@ static spinlock_t ir_raw_handler_lock; /* Used to load the decoders */ static struct work_struct wq_load; -static void ir_keyup_timer(unsigned long data) -{ - struct input_dev *input_dev = (struct input_dev *)data; - - ir_keyup(input_dev); -} - int ir_raw_event_register(struct input_dev *input_dev) { struct ir_input_dev *ir = input_get_drvdata(input_dev); @@ -72,11 +65,6 @@ int ir_raw_event_register(struct input_dev *input_dev) size = sizeof(struct ir_raw_event) * MAX_IR_EVENT_SIZE * 2; size = roundup_pow_of_two(size); - init_timer(&ir->raw->timer_keyup); - ir->raw->timer_keyup.function = ir_keyup_timer; - ir->raw->timer_keyup.data = (unsigned long)input_dev; - set_bit(EV_REP, input_dev->evbit); - rc = kfifo_alloc(&ir->raw->kfifo, size, GFP_KERNEL); if (rc < 0) { kfree (ir->raw); @@ -103,8 +91,6 @@ void ir_raw_event_unregister(struct input_dev *input_dev) if (!ir->raw) return; - del_timer_sync(&ir->raw->timer_keyup); - RUN_DECODER(raw_unregister, input_dev); kfifo_free(&ir->raw->kfifo); diff --git a/include/media/ir-core.h b/include/media/ir-core.h index 60ee020..72e4b3e 100644 --- a/include/media/ir-core.h +++ b/include/media/ir-core.h @@ -68,7 +68,6 @@ struct ir_raw_event { struct ir_raw_event_ctrl { struct kfifo kfifo; /* fifo for the pulse/space events */ struct timespec last_event; /* when last event occurred */ - struct timer_list timer_keyup; /* timer for key release */ }; struct ir_input_dev { @@ -78,10 +77,16 @@ struct ir_input_dev { unsigned long devno; /* device number */ const struct ir_dev_props *props; /* Device properties */ struct ir_raw_event_ctrl *raw; /* for raw pulse/space events */ + struct input_dev *input_dev; /* the input device associated with this device */ /* key info - needed by IR keycode handlers */ - u32 keycode; /* linux key code */ - int keypressed; /* current state */ + spinlock_t keylock; /* protects the below members */ + bool keypressed; /* current state */ + unsigned long keyup_jiffies; /* when should the current keypress be released? */ + struct timer_list timer_keyup; /* timer for releasing a keypress */ + u32 last_keycode; /* keycode of last command */ + u32 last_scancode; /* scancode of last command */ + u8 last_toggle; /* toggle of last command */ }; struct ir_raw_handler { @@ -100,8 +105,8 @@ struct ir_raw_handler { u32 ir_g_keycode_from_table(struct input_dev *input_dev, u32 scancode); -void ir_keyup(struct input_dev *dev); -void ir_keydown(struct input_dev *dev, int scancode); +void ir_repeat(struct ir_input_dev *ir); +void ir_keydown(struct ir_input_dev *ir, int scancode, u8 toggle); int ir_input_register(struct input_dev *dev, const struct ir_scancode_table *ir_codes, const struct ir_dev_props *props, -- 1.7.0.3 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
