1 files changed, 391 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 00000000000..41bacff2496
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -0,0 +1,391 @@
+/* dvb-usb-remote.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for initializing the input-device and for handling remote-control-queries.
+ */
+#include "dvb-usb-common.h"
+#include <linux/usb/input.h>
+
+static unsigned int
+legacy_dvb_usb_get_keymap_index(const struct input_keymap_entry *ke,
+                                struct rc_map_table *keymap,
+                                unsigned int keymap_size)
+{
+        unsigned int index;
+        unsigned int scancode;
+
+        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+                index = ke->index;
+        } else {
+                if (input_scancode_to_scalar(ke, &scancode))
+                        return keymap_size;
+
+                /* See if we can match the raw key code. */
+                for (index = 0; index < keymap_size; index++)
+                        if (keymap[index].scancode == scancode)
+                                break;
+
+                /* See if there is an unused hole in the map */
+                if (index >= keymap_size) {
+                        for (index = 0; index < keymap_size; index++) {
+                                if (keymap[index].keycode == KEY_RESERVED ||
+                                    keymap[index].keycode == KEY_UNKNOWN) {
+                                        break;
+                                }
+                        }
+                }
+        }
+
+        return index;
+}
+
+static int legacy_dvb_usb_getkeycode(struct input_dev *dev,
+                                     struct input_keymap_entry *ke)
+{
+        struct dvb_usb_device *d = input_get_drvdata(dev);
+        struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+        unsigned int keymap_size = d->props.rc.legacy.rc_map_size;
+        unsigned int index;
+
+        index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);
+        if (index >= keymap_size)
+                return -EINVAL;
+
+        ke->keycode = keymap[index].keycode;
+        if (ke->keycode == KEY_UNKNOWN)
+                ke->keycode = KEY_RESERVED;
+        ke->len = sizeof(keymap[index].scancode);
+        memcpy(&ke->scancode, &keymap[index].scancode, ke->len);
+        ke->index = index;
+
+        return 0;
+}
+
+static int legacy_dvb_usb_setkeycode(struct input_dev *dev,
+                                     const struct input_keymap_entry *ke,
+                                     unsigned int *old_keycode)
+{
+        struct dvb_usb_device *d = input_get_drvdata(dev);
+        struct rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+        unsigned int keymap_size = d->props.rc.legacy.rc_map_size;
+        unsigned int index;
+
+        index = legacy_dvb_usb_get_keymap_index(ke, keymap, keymap_size);
+        /*
+         * FIXME: Currently, it is not possible to increase the size of
+         * scancode table. For it to happen, one possibility
+         * would be to allocate a table with key_map_size + 1,
+         * copying data, appending the new key on it, and freeing
+         * the old one - or maybe just allocating some spare space
+         */
+        if (index >= keymap_size)
+                return -EINVAL;
+
+        *old_keycode = keymap[index].keycode;
+        keymap->keycode = ke->keycode;
+        __set_bit(ke->keycode, dev->keybit);
+
+        if (*old_keycode != KEY_RESERVED) {
+                __clear_bit(*old_keycode, dev->keybit);
+                for (index = 0; index < keymap_size; index++) {
+                        if (keymap[index].keycode == *old_keycode) {
+                                __set_bit(*old_keycode, dev->keybit);
+                                break;
+                        }
+                }
+        }
+
+        return 0;
+}
+
+/* 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 legacy_dvb_usb_read_remote_control(struct work_struct *work)
+{
+        struct dvb_usb_device *d =
+                container_of(work, struct dvb_usb_device, rc_query_work.work);
+        u32 event;
+        int state;
+
+        /* TODO: need a lock here.  We can simply skip checking for the remote control
+           if we're busy. */
+
+        /* when the parameter has been set to 1 via sysfs while the driver was running */
+        if (dvb_usb_disable_rc_polling)
+                return;
+
+        if (d->props.rc.legacy.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->input_dev, EV_KEY, event, 1);
+                        input_sync(d->input_dev);
+                        input_event(d->input_dev, EV_KEY, d->last_event, 0);
+                        input_sync(d->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.legacy.rc_interval));
+}
+
+static int legacy_dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+        int i, err, rc_interval;
+        struct input_dev *input_dev;
+
+        input_dev = input_allocate_device();
+        if (!input_dev)
+                return -ENOMEM;
+
+        input_dev->evbit[0] = BIT_MASK(EV_KEY);
+        input_dev->name = "IR-receiver inside an USB DVB receiver";
+        input_dev->phys = d->rc_phys;
+        usb_to_input_id(d->udev, &input_dev->id);
+        input_dev->dev.parent = &d->udev->dev;
+        d->input_dev = input_dev;
+        d->rc_dev = NULL;
+
+        input_dev->getkeycode = legacy_dvb_usb_getkeycode;
+        input_dev->setkeycode = legacy_dvb_usb_setkeycode;
+
+        /* set the bits for the keys */
+        deb_rc("key map size: %d\n", d->props.rc.legacy.rc_map_size);
+        for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
+                deb_rc("setting bit for event %d item %d\n",
+                        d->props.rc.legacy.rc_map_table[i].keycode, i);
+                set_bit(d->props.rc.legacy.rc_map_table[i].keycode, input_dev->keybit);
+        }
+
+        /* setting these two values to non-zero, we have to manage key repeats */
+        input_dev->rep[REP_PERIOD] = d->props.rc.legacy.rc_interval;
+        input_dev->rep[REP_DELAY]  = d->props.rc.legacy.rc_interval + 150;
+
+        input_set_drvdata(input_dev, d);
+
+        err = input_register_device(input_dev);
+        if (err)
+                input_free_device(input_dev);
+
+        rc_interval = d->props.rc.legacy.rc_interval;
+
+        INIT_DELAYED_WORK(&d->rc_query_work, legacy_dvb_usb_read_remote_control);
+
+        info("schedule remote query interval to %d msecs.", rc_interval);
+        schedule_delayed_work(&d->rc_query_work,
+                              msecs_to_jiffies(rc_interval));
+
+        d->state |= DVB_USB_STATE_REMOTE;
+
+        return err;
+}
+
+/* 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(struct work_struct *work)
+{
+        struct dvb_usb_device *d =
+                container_of(work, struct dvb_usb_device, rc_query_work.work);
+        int err;
+
+        /* TODO: need a lock here.  We can simply skip checking for the remote control
+           if we're busy. */
+
+        /* when the parameter has been set to 1 via sysfs while the
+         * driver was running, or when bulk mode is enabled after IR init
+         */
+        if (dvb_usb_disable_rc_polling || d->props.rc.core.bulk_mode)
+                return;
+
+        err = d->props.rc.core.rc_query(d);
+        if (err)
+                err("error %d while querying for an remote control event.", err);
+
+        schedule_delayed_work(&d->rc_query_work,
+                              msecs_to_jiffies(d->props.rc.core.rc_interval));
+}
+
+static int rc_core_dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+        int err, rc_interval;
+        struct rc_dev *dev;
+
+        dev = rc_allocate_device();
+        if (!dev)
+                return -ENOMEM;
+
+        dev->driver_name = d->props.rc.core.module_name;
+        dev->map_name = d->props.rc.core.rc_codes;
+        dev->change_protocol = d->props.rc.core.change_protocol;
+        dev->allowed_protos = d->props.rc.core.allowed_protos;
+        dev->driver_type = d->props.rc.core.driver_type;
+        usb_to_input_id(d->udev, &dev->input_id);
+        dev->input_name = "IR-receiver inside an USB DVB receiver";
+        dev->input_phys = d->rc_phys;
+        dev->dev.parent = &d->udev->dev;
+        dev->priv = d;
+
+        err = rc_register_device(dev);
+        if (err < 0) {
+                rc_free_device(dev);
+                return err;
+        }
+
+        d->input_dev = NULL;
+        d->rc_dev = dev;
+
+        if (!d->props.rc.core.rc_query || d->props.rc.core.bulk_mode)
+                return 0;
+
+        /* Polling mode - initialize a work queue for handling it */
+        INIT_DELAYED_WORK(&d->rc_query_work, dvb_usb_read_remote_control);
+
+        rc_interval = d->props.rc.core.rc_interval;
+
+        info("schedule remote query interval to %d msecs.", rc_interval);
+        schedule_delayed_work(&d->rc_query_work,
+                              msecs_to_jiffies(rc_interval));
+
+        return 0;
+}
+
+int dvb_usb_remote_init(struct dvb_usb_device *d)
+{
+        int err;
+
+        if (dvb_usb_disable_rc_polling)
+                return 0;
+
+        if (d->props.rc.legacy.rc_map_table && d->props.rc.legacy.rc_query)
+                d->props.rc.mode = DVB_RC_LEGACY;
+        else if (d->props.rc.core.rc_codes)
+                d->props.rc.mode = DVB_RC_CORE;
+        else
+                return 0;
+
+        usb_make_path(d->udev, d->rc_phys, sizeof(d->rc_phys));
+        strlcat(d->rc_phys, "/ir0", sizeof(d->rc_phys));
+
+        /* Start the remote-control polling. */
+        if (d->props.rc.legacy.rc_interval < 40)
+                d->props.rc.legacy.rc_interval = 100; /* default */
+
+        if (d->props.rc.mode == DVB_RC_LEGACY)
+                err = legacy_dvb_usb_remote_init(d);
+        else
+                err = rc_core_dvb_usb_remote_init(d);
+        if (err)
+                return err;
+
+        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_sync(&d->rc_query_work);
+                if (d->props.rc.mode == DVB_RC_LEGACY)
+                        input_unregister_device(d->input_dev);
+                else
+                        rc_unregister_device(d->rc_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 rc_map_table *keymap = d->props.rc.legacy.rc_map_table;
+        *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 < d->props.rc.legacy.rc_map_size; i++)
+                                if (rc5_custom(&keymap[i]) == keybuf[1] &&
+                                        rc5_data(&keymap[i]) == keybuf[3]) {
+                                        *event = keymap[i].keycode;
+                                        *state = REMOTE_KEY_PRESSED;
+                                        return 0;
+                                }
+                        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("unknown type of remote status: %d\n",keybuf[0]);
+                        break;
+        }
+        return 0;
+}
+EXPORT_SYMBOL(dvb_usb_nec_rc_key_to_event);