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. Changes since last version: Clarify a comment Refreshed to apply on top of previous patch Let the new functions take input_dev as their main argument (as there's no agreement on this point yet) Signed-off-by: David Härdeman <david@xxxxxxxxxxx> Index: ir/drivers/media/IR/ir-keytable.c =================================================================== --- ir.orig/drivers/media/IR/ir-keytable.c 2010-04-02 12:32:13.015233729 +0200 +++ ir/drivers/media/IR/ir-keytable.c 2010-04-02 16:40:37.908276737 +0200 @@ -20,6 +20,9 @@ #define IR_TAB_MIN_SIZE 256 #define IR_TAB_MAX_SIZE 8192 +/* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ +#define IR_KEYPRESS_TIMEOUT 250 + /** * ir_resize_table() - resizes a scancode table if necessary * @rc_tab: the ir_scancode_table to resize @@ -250,56 +253,124 @@ /** * 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; +} + +/** + * 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 + * @dev: the struct 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 input_dev *dev) +{ + unsigned long flags; + struct ir_input_dev *ir = input_get_drvdata(dev); + + 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_keyup); +EXPORT_SYMBOL_GPL(ir_repeat); /** * ir_keydown() - generates input event for a key press - * @input_dev: the struct input_dev descriptor of the device + * @dev: the struct 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 input_dev *dev, int scancode, u8 toggle) { + unsigned long flags; struct ir_input_dev *ir = input_get_drvdata(dev); u32 keycode = ir_g_keycode_from_table(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; + + /* Release old keypress */ + ir_keyup(ir); + + ir->last_scancode = scancode; + ir->last_toggle = toggle; + ir->last_keycode = keycode; - ir->keycode = keycode; - ir->keypressed = 1; + 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", - dev->name, keycode, scancode); - - input_report_key(dev, ir->keycode, 1); + dev->name, keycode, scancode); + input_report_key(dev, ir->last_keycode, 1); input_sync(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); @@ -352,8 +423,12 @@ input_dev->getkeycode = ir_getkeycode; input_dev->setkeycode = ir_setkeycode; input_set_drvdata(input_dev, ir_dev); + ir_dev->input_dev = input_dev; 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->rc_tab.name = rc_tab->name; ir_dev->rc_tab.ir_type = rc_tab->ir_type; ir_dev->rc_tab.alloc = roundup_pow_of_two(rc_tab->len * @@ -370,6 +445,8 @@ ir_dev->rc_tab.size, ir_dev->rc_tab.alloc); set_bit(EV_KEY, input_dev->evbit); + set_bit(EV_REP, input_dev->evbit); + if (ir_setkeytable(input_dev, &ir_dev->rc_tab, rc_tab)) { rc = -ENOMEM; goto out_table; @@ -412,7 +489,7 @@ 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); Index: ir/drivers/media/IR/ir-nec-decoder.c =================================================================== --- ir.orig/drivers/media/IR/ir-nec-decoder.c 2010-04-02 12:22:50.872195298 +0200 +++ ir/drivers/media/IR/ir-nec-decoder.c 2010-04-02 16:34:32.531192323 +0200 @@ -179,8 +179,7 @@ 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(input_dev); IR_dprintk(1, "NEC repeat event\n"); return 1; } else { @@ -237,9 +236,7 @@ } 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(input_dev, ircode, 0); return 1; err: Index: ir/drivers/media/IR/ir-raw-event.c =================================================================== --- ir.orig/drivers/media/IR/ir-raw-event.c 2010-04-02 12:22:50.856216460 +0200 +++ ir/drivers/media/IR/ir-raw-event.c 2010-04-02 12:34:05.395187844 +0200 @@ -53,13 +53,6 @@ /* 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 @@ 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 @@ if (!ir->raw) return; - del_timer_sync(&ir->raw->timer_keyup); - RUN_DECODER(raw_unregister, input_dev); kfifo_free(&ir->raw->kfifo); Index: ir/include/media/ir-core.h =================================================================== --- ir.orig/include/media/ir-core.h 2010-04-02 12:22:50.836196555 +0200 +++ ir/include/media/ir-core.h 2010-04-02 16:23:29.783236946 +0200 @@ -70,7 +70,6 @@ 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 { @@ -80,10 +79,16 @@ 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 { @@ -102,8 +107,8 @@ 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 input_dev *dev); +void ir_keydown(struct input_dev *dev, 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, -- 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
