[PATCH] dvb: Add generalized dvb-usb driver

Add generalized dvb-usb driver which supports a wide variety of devices.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
new file mode 100644
index 000000000000..9f1e23f82bae
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -0,0 +1,175 @@
+/* dvb-usb-remote.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for initializing the the input-device and for handling remote-control-queries.
+ */
+#include "dvb-usb-common.h"
+
+/* Remote-control poll function - called every dib->rc_query_interval ms to see
+ * whether the remote control has received anything.
+ *
+ * TODO: Fix the repeat rate of the input device.
+ */
+static void dvb_usb_read_remote_control(void *data)
+{
+	struct dvb_usb_device *d = data;
+	u32 event;
+	int state;
+
+	/* TODO: need a lock here.  We can simply skip checking for the remote control
+	   if we're busy. */
+
+	if (d->props.rc_query(d,&event,&state)) {
+		err("error while querying for an remote control event.");
+		goto schedule;
+	}
+
+
+	switch (state) {
+		case REMOTE_NO_KEY_PRESSED:
+			break;
+		case REMOTE_KEY_PRESSED:
+			deb_rc("key pressed\n");
+			d->last_event = event;
+		case REMOTE_KEY_REPEAT:
+			deb_rc("key repeated\n");
+			input_event(&d->rc_input_dev, EV_KEY, event, 1);
+			input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
+			input_sync(&d->rc_input_dev);
+			break;
+		default:
+			break;
+	}
+
+/* improved repeat handling ???
+	switch (state) {
+		case REMOTE_NO_KEY_PRESSED:
+			deb_rc("NO KEY PRESSED\n");
+			if (d->last_state != REMOTE_NO_KEY_PRESSED) {
+				deb_rc("releasing event %d\n",d->last_event);
+				input_event(&d->rc_input_dev, EV_KEY, d->last_event, 0);
+				input_sync(&d->rc_input_dev);
+			}
+			d->last_state = REMOTE_NO_KEY_PRESSED;
+			d->last_event = 0;
+			break;
+		case REMOTE_KEY_PRESSED:
+			deb_rc("KEY PRESSED\n");
+			deb_rc("pressing event %d\n",event);
+
+			input_event(&d->rc_input_dev, EV_KEY, event, 1);
+			input_sync(&d->rc_input_dev);
+
+			d->last_event = event;
+			d->last_state = REMOTE_KEY_PRESSED;
+			break;
+		case REMOTE_KEY_REPEAT:
+			deb_rc("KEY_REPEAT\n");
+			if (d->last_state != REMOTE_NO_KEY_PRESSED) {
+				deb_rc("repeating event %d\n",d->last_event);
+				input_event(&d->rc_input_dev, EV_KEY, d->last_event, 2);
+				input_sync(&d->rc_input_dev);
+				d->last_state = REMOTE_KEY_REPEAT;
+			}
+		default:
+			break;
+	}
+*/
+
+schedule:
+	schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
+}
+
+int dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+	int i;
+	if (d->props.rc_key_map == NULL)
+		return 0;
+
+	/* Initialise the remote-control structures.*/
+	init_input_dev(&d->rc_input_dev);
+
+	d->rc_input_dev.evbit[0] = BIT(EV_KEY);
+	d->rc_input_dev.keycodesize = sizeof(unsigned char);
+	d->rc_input_dev.keycodemax = KEY_MAX;
+	d->rc_input_dev.name = "IR-receiver inside an USB DVB receiver";
+
+	/* set the bits for the keys */
+	deb_rc("key map size: %d\n",d->props.rc_key_map_size);
+	for (i = 0; i < d->props.rc_key_map_size; i++) {
+		deb_rc("setting bit for event %d item %d\n",d->props.rc_key_map[i].event, i);
+		set_bit(d->props.rc_key_map[i].event, d->rc_input_dev.keybit);
+	}
+
+	/* Start the remote-control polling. */
+	if (d->props.rc_interval < 40)
+		d->props.rc_interval = 100; /* default */
+
+	/* setting these two values to non-zero, we have to manage key repeats */
+	d->rc_input_dev.rep[REP_PERIOD] = d->props.rc_interval;
+	d->rc_input_dev.rep[REP_DELAY]  = d->props.rc_interval + 150;
+
+	input_register_device(&d->rc_input_dev);
+
+	INIT_WORK(&d->rc_query_work, dvb_usb_read_remote_control, d);
+
+	info("schedule remote query interval to %d msecs.",d->props.rc_interval);
+	schedule_delayed_work(&d->rc_query_work,msecs_to_jiffies(d->props.rc_interval));
+
+	d->state |= DVB_USB_STATE_REMOTE;
+
+	return 0;
+}
+
+int dvb_usb_remote_exit(struct dvb_usb_device *d)
+{
+	if (d->state & DVB_USB_STATE_REMOTE) {
+		cancel_delayed_work(&d->rc_query_work);
+		flush_scheduled_work();
+		input_unregister_device(&d->rc_input_dev);
+	}
+	d->state &= ~DVB_USB_STATE_REMOTE;
+	return 0;
+}
+
+#define DVB_USB_RC_NEC_EMPTY           0x00
+#define DVB_USB_RC_NEC_KEY_PRESSED     0x01
+#define DVB_USB_RC_NEC_KEY_REPEATED    0x02
+int dvb_usb_nec_rc_key_to_event(struct dvb_usb_device *d,
+		u8 keybuf[5], u32 *event, int *state)
+{
+	int i;
+	struct dvb_usb_rc_key *keymap = d->props.rc_key_map;
+	*event = 0;
+	*state = REMOTE_NO_KEY_PRESSED;
+	switch (keybuf[0]) {
+		case DVB_USB_RC_NEC_EMPTY:
+			break;
+		case DVB_USB_RC_NEC_KEY_PRESSED:
+			if ((u8) ~keybuf[1] != keybuf[2] ||
+				(u8) ~keybuf[3] != keybuf[4]) {
+				deb_err("remote control checksum failed.\n");
+				break;
+			}
+			/* See if we can match the raw key code. */
+			for (i = 0; i < sizeof(keymap)/sizeof(struct dvb_usb_rc_key); i++)
+				if (keymap[i].custom == keybuf[1] &&
+					keymap[i].data == keybuf[3]) {
+					*event = keymap[i].event;
+					*state = REMOTE_KEY_PRESSED;
+					break;
+				}
+			deb_err("key mapping failed - no appropriate key found in keymapping\n");
+			break;
+		case DVB_USB_RC_NEC_KEY_REPEATED:
+			*state = REMOTE_KEY_REPEAT;
+			break;
+		default:
+			deb_err("unkown type of remote status: %d\n",keybuf[0]);
+			break;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);