[PATCH 127/141] V4L/DVB (3197a): IR keymaps are exported by their-common module now

[mchehab]

From: Ricardo Cerqueira <v4l@xxxxxxxxxxxxx>
Date: 1141398822 -0300

Moved keymaps to the ir-common module, and export them from there, instead
of #including them in each module

Included missing files from V4L/DVB(3197).

Signed-off-by: Ricardo Cerqueira <v4l@xxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
---

diff --git a/drivers/media/common/ir-functions.c b/drivers/media/common/ir-functions.c
diff --git a/drivers/media/common/ir-functions.c b/drivers/media/common/ir-functions.c
new file mode 100644
index 0000000..397cff8
--- /dev/null
+++ b/drivers/media/common/ir-functions.c
@@ -0,0 +1,272 @@
+/*
+ *
+ * some common structs and functions to handle infrared remotes via
+ * input layer ...
+ *
+ * (c) 2003 Gerd Knorr <kraxel@xxxxxxxxxxx> [SuSE Labs]
+ *
+ *  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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/string.h>
+#include <media/ir-common.h>
+
+/* -------------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Gerd Knorr <kraxel@xxxxxxxxxxx> [SuSE Labs]");
+MODULE_LICENSE("GPL");
+
+static int repeat = 1;
+module_param(repeat, int, 0444);
+MODULE_PARM_DESC(repeat,"auto-repeat for IR keys (default: on)");
+
+static int debug = 0;    /* debug level (0,1,2) */
+module_param(debug, int, 0644);
+
+#define dprintk(level, fmt, arg...)	if (debug >= level) \
+	printk(KERN_DEBUG fmt , ## arg)
+
+/* -------------------------------------------------------------------------- */
+
+static void ir_input_key_event(struct input_dev *dev, struct ir_input_state *ir)
+{
+	if (KEY_RESERVED == ir->keycode) {
+		printk(KERN_INFO "%s: unknown key: key=0x%02x raw=0x%02x down=%d\n",
+		       dev->name,ir->ir_key,ir->ir_raw,ir->keypressed);
+		return;
+	}
+	dprintk(1,"%s: key event code=%d down=%d\n",
+		dev->name,ir->keycode,ir->keypressed);
+	input_report_key(dev,ir->keycode,ir->keypressed);
+	input_sync(dev);
+}
+
+/* -------------------------------------------------------------------------- */
+
+void ir_input_init(struct input_dev *dev, struct ir_input_state *ir,
+		   int ir_type, IR_KEYTAB_TYPE *ir_codes)
+{
+	int i;
+
+	ir->ir_type = ir_type;
+	if (ir_codes)
+		memcpy(ir->ir_codes, ir_codes, sizeof(ir->ir_codes));
+
+
+	dev->keycode     = ir->ir_codes;
+	dev->keycodesize = sizeof(IR_KEYTAB_TYPE);
+	dev->keycodemax  = IR_KEYTAB_SIZE;
+	for (i = 0; i < IR_KEYTAB_SIZE; i++)
+		set_bit(ir->ir_codes[i], dev->keybit);
+	clear_bit(0, dev->keybit);
+
+	set_bit(EV_KEY, dev->evbit);
+	if (repeat)
+		set_bit(EV_REP, dev->evbit);
+}
+
+void ir_input_nokey(struct input_dev *dev, struct ir_input_state *ir)
+{
+	if (ir->keypressed) {
+		ir->keypressed = 0;
+		ir_input_key_event(dev,ir);
+	}
+}
+
+void ir_input_keydown(struct input_dev *dev, struct ir_input_state *ir,
+		      u32 ir_key, u32 ir_raw)
+{
+	u32 keycode = IR_KEYCODE(ir->ir_codes, ir_key);
+
+	if (ir->keypressed && ir->keycode != keycode) {
+		ir->keypressed = 0;
+		ir_input_key_event(dev,ir);
+	}
+	if (!ir->keypressed) {
+		ir->ir_key  = ir_key;
+		ir->ir_raw  = ir_raw;
+		ir->keycode = keycode;
+		ir->keypressed = 1;
+		ir_input_key_event(dev,ir);
+	}
+}
+
+/* -------------------------------------------------------------------------- */
+
+u32 ir_extract_bits(u32 data, u32 mask)
+{
+	int mbit, vbit;
+	u32 value;
+
+	value = 0;
+	vbit  = 0;
+	for (mbit = 0; mbit < 32; mbit++) {
+		if (!(mask & ((u32)1 << mbit)))
+			continue;
+		if (data & ((u32)1 << mbit))
+			value |= (1 << vbit);
+		vbit++;
+	}
+	return value;
+}
+
+static int inline getbit(u32 *samples, int bit)
+{
+	return (samples[bit/32] & (1 << (31-(bit%32)))) ? 1 : 0;
+}
+
+/* sump raw samples for visual debugging ;) */
+int ir_dump_samples(u32 *samples, int count)
+{
+	int i, bit, start;
+
+	printk(KERN_DEBUG "ir samples: ");
+	start = 0;
+	for (i = 0; i < count * 32; i++) {
+		bit = getbit(samples,i);
+		if (bit)
+			start = 1;
+		if (0 == start)
+			continue;
+		printk("%s", bit ? "#" : "_");
+	}
+	printk("\n");
+	return 0;
+}
+
+/* decode raw samples, pulse distance coding used by NEC remotes */
+int ir_decode_pulsedistance(u32 *samples, int count, int low, int high)
+{
+	int i,last,bit,len;
+	u32 curBit;
+	u32 value;
+
+	/* find start burst */
+	for (i = len = 0; i < count * 32; i++) {
+		bit = getbit(samples,i);
+		if (bit) {
+			len++;
+		} else {
+			if (len >= 29)
+				break;
+			len = 0;
+		}
+	}
+
+	/* start burst to short */
+	if (len < 29)
+		return 0xffffffff;
+
+	/* find start silence */
+	for (len = 0; i < count * 32; i++) {
+		bit = getbit(samples,i);
+		if (bit) {
+			break;
+		} else {
+			len++;
+		}
+	}
+
+	/* silence to short */
+	if (len < 7)
+		return 0xffffffff;
+
+	/* go decoding */
+	len   = 0;
+	last = 1;
+	value = 0; curBit = 1;
+	for (; i < count * 32; i++) {
+		bit  = getbit(samples,i);
+		if (last) {
+			if(bit) {
+				continue;
+			} else {
+				len = 1;
+			}
+		} else {
+			if (bit) {
+				if (len > (low + high) /2)
+					value |= curBit;
+				curBit <<= 1;
+				if (curBit == 1)
+					break;
+			} else {
+				len++;
+			}
+		}
+		last = bit;
+	}
+
+	return value;
+}
+
+/* decode raw samples, biphase coding, used by rc5 for example */
+int ir_decode_biphase(u32 *samples, int count, int low, int high)
+{
+	int i,last,bit,len,flips;
+	u32 value;
+
+	/* find start bit (1) */
+	for (i = 0; i < 32; i++) {
+		bit = getbit(samples,i);
+		if (bit)
+			break;
+	}
+
+	/* go decoding */
+	len   = 0;
+	flips = 0;
+	value = 1;
+	for (; i < count * 32; i++) {
+		if (len > high)
+			break;
+		if (flips > 1)
+			break;
+		last = bit;
+		bit  = getbit(samples,i);
+		if (last == bit) {
+			len++;
+			continue;
+		}
+		if (len < low) {
+			len++;
+			flips++;
+			continue;
+		}
+		value <<= 1;
+		value |= bit;
+		flips = 0;
+		len   = 1;
+	}
+	return value;
+}
+
+EXPORT_SYMBOL_GPL(ir_input_init);
+EXPORT_SYMBOL_GPL(ir_input_nokey);
+EXPORT_SYMBOL_GPL(ir_input_keydown);
+
+EXPORT_SYMBOL_GPL(ir_extract_bits);
+EXPORT_SYMBOL_GPL(ir_dump_samples);
+EXPORT_SYMBOL_GPL(ir_decode_biphase);
+EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
+

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