As all the basics are now in place, we can finally add the ioctls
for adding/removing keytables from userspace.
Signed-off-by: David Härdeman <da...@hardeman.nu>
---
drivers/media/rc/rc-core-priv.h | 2 -
drivers/media/rc/rc-keytable.c | 5 ++
drivers/media/rc/rc-main.c | 81 ++++++++++++++++++++++++++++++++++++---
include/media/rc-core.h | 27 +++++++++++++
4 files changed, 106 insertions(+), 9 deletions(-)
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index 02b538c..0159836 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -162,7 +162,7 @@ void rc_keytable_keyup(struct rc_keytable *kt);
void rc_keytable_repeat(struct rc_keytable *kt);
void rc_keytable_keydown(struct rc_keytable *kt, enum rc_type protocol,
u32 scancode, u8 toggle, bool autokeyup);
-struct rc_keytable *rc_keytable_create(struct rc_dev *dev, struct rc_map
*rc_map);
+struct rc_keytable *rc_keytable_create(struct rc_dev *dev, const char *name,
struct rc_map *rc_map);
void rc_keytable_destroy(struct rc_keytable *kt);
/* Only to be used by rc-core and ir-lirc-codec */
diff --git a/drivers/media/rc/rc-keytable.c b/drivers/media/rc/rc-keytable.c
index 412d342..6d04b8f 100644
--- a/drivers/media/rc/rc-keytable.c
+++ b/drivers/media/rc/rc-keytable.c
@@ -825,6 +825,7 @@ static void rc_input_close(struct input_dev *idev)
/**
* rc_keytable_create() - create a new keytable
* @dev: the struct rc_dev device this keytable should belong to
+ * @name: the userfriendly name of this keymap
* @rc_map: the keymap to use for the new keytable
* @return: zero on success or a negative error code
*
@@ -832,7 +833,8 @@ static void rc_input_close(struct input_dev *idev)
* keytable and an input device along with some state (whether a key is
* currently pressed or not, etc).
*/
-struct rc_keytable *rc_keytable_create(struct rc_dev *dev, struct rc_map
*rc_map)
+struct rc_keytable *rc_keytable_create(struct rc_dev *dev, const char *name,
+ struct rc_map *rc_map)
{
struct rc_keytable *kt;
struct input_dev *idev = NULL;
@@ -854,6 +856,7 @@ struct rc_keytable *rc_keytable_create(struct rc_dev *dev,
struct rc_map *rc_map
kt->dev = dev;
spin_lock_init(&kt->keylock);
spin_lock_init(&kt->rc_map.lock);
+ snprintf(kt->name, sizeof(*kt->name), name ? name : "undefined");
idev->getkeycode = ir_getkeycode;
idev->setkeycode = ir_setkeycode;
idev->open = rc_input_open;
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index bc2d479..ad784c8 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -201,7 +201,8 @@ void rc_repeat(struct rc_dev *dev)
}
EXPORT_SYMBOL_GPL(rc_repeat);
-static int rc_add_keytable(struct rc_dev *dev, struct rc_map *rc_map)
+static int rc_add_keytable(struct rc_dev *dev, const char *name,
+ struct rc_map *rc_map)
{
struct rc_keytable *kt;
unsigned i;
@@ -219,7 +220,7 @@ static int rc_add_keytable(struct rc_dev *dev, struct
rc_map *rc_map)
if (i >= ARRAY_SIZE(dev->keytables))
return -ENFILE;
- kt = rc_keytable_create(dev, rc_map);
+ kt = rc_keytable_create(dev, name, rc_map);
if (IS_ERR(kt))
return PTR_ERR(kt);
@@ -229,19 +230,24 @@ static int rc_add_keytable(struct rc_dev *dev, struct
rc_map *rc_map)
return 0;
}
-static void rc_remove_keytable(struct rc_dev *dev, unsigned i)
+static int rc_remove_keytable(struct rc_dev *dev, unsigned i)
{
struct rc_keytable *kt;
if (i >= ARRAY_SIZE(dev->keytables))
- return;
+ return -EINVAL;
kt = dev->keytables[i];
rcu_assign_pointer(dev->keytables[i], NULL);
if (kt)
list_del_rcu(&kt->node);
synchronize_rcu();
+
+ if (!kt)
+ return -EINVAL;
+
rc_keytable_destroy(kt);
+ return 0;
}
/* class for /sys/class/rc */
@@ -946,6 +952,8 @@ static long rc_do_ioctl(struct rc_dev *dev, unsigned int
cmd, unsigned long arg)
unsigned int __user *ip = (unsigned int __user *)p;
struct rc_ir_rx rx;
struct rc_ir_tx tx;
+ struct rc_keytable_ioctl ktio;
+ struct rc_keytable *kt;
int error;
switch (cmd) {
@@ -1007,8 +1015,69 @@ static long rc_do_ioctl(struct rc_dev *dev, unsigned int
cmd, unsigned long arg)
return -EFAULT;
return 0;
- }
+ case RCIOCADDTABLE:
+ if (copy_from_user(&ktio, p, sizeof(ktio)))
+ return -EFAULT;
+
+ if (ktio.id >= RC_MAX_KEYTABLES)
+ return -EINVAL;
+
+ if (ktio.flags)
+ return -EINVAL;
+
+ ktio.name[sizeof(ktio.name) - 1] = '\0';
+ if (strlen(ktio.name) < 1)
+ return -EINVAL;
+
+ error = rc_add_keytable(dev, ktio.name, NULL);
+ if (error < 0)
+ return error;
+ ktio.id = error;
+
+ if (copy_to_user(p, &ktio, sizeof(ktio)))
+ return -EFAULT;
+
+ return 0;
+
+ case RCIOCGTABLENAME:
+ if (copy_from_user(&ktio, p, sizeof(ktio)))
+ return -EFAULT;
+
+ if (ktio.id >= RC_MAX_KEYTABLES)
+ return -EINVAL;
+
+ if (ktio.flags)
+ return -EINVAL;
+
+ rcu_read_lock();
+ kt = rcu_dereference(dev->keytables[ktio.id]);
+ if (kt) {
+ ktio.name[0] = '\0';
+ strncat(ktio.name, kt->name, sizeof(ktio.name));
+ }
+ rcu_read_unlock();
+
+ if (!kt)
+ return -EINVAL;
+
+ if (copy_to_user(p, &ktio, sizeof(ktio)))
+ return -EFAULT;
+
+ return 0;
+
+ case RCIOCDELTABLE:
+ if (copy_from_user(&ktio, p, sizeof(ktio)))
+ return -EFAULT;
+
+ if (ktio.id >= RC_MAX_KEYTABLES)
+ return -EINVAL;
+
+ if (ktio.flags)
+ return -EINVAL;
+
+ return rc_remove_keytable(dev, ktio.id);
+ }
return -EINVAL;
}
@@ -1276,7 +1345,7 @@ int rc_register_device(struct rc_dev *dev)
if (rc)
goto out_cdev;
- rc = rc_add_keytable(dev, rc_map);
+ rc = rc_add_keytable(dev, dev->map_name, rc_map);
if (rc)
goto out_dev;
diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index f48d5cd..6f282e6 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -153,6 +153,29 @@ struct rc_ir_tx {
__u32 reserved[9];
} __packed;
+/* add a keytable */
+#define RCIOCADDTABLE _IOC(_IOC_READ | _IOC_WRITE, RC_IOC_MAGIC, 0x06,
sizeof(struct rc_keytable_ioctl))
+
+/* get the name of a keytable */
+#define RCIOCGTABLENAME _IOC(_IOC_READ, RC_IOC_MAGIC, 0x06,
sizeof(struct rc_keytable_ioctl))
+
+/* remove a keytable */
+#define RCIOCDELTABLE _IOC(_IOC_WRITE, RC_IOC_MAGIC, 0x06, sizeof(struct
rc_keytable_ioctl))
+
+/**
+ * struct rc_keytable_ioctl - used to alter keytables
+ * @id: the id of the keytable
+ * @flags: flags for the keytable
+ * @reserved: for future use, set to zero
+ * @name: a user-friendly name for the keytable
+ */
+#define RC_KEYTABLE_NAME_SIZE 128
+struct rc_keytable_ioctl {
+ __u32 id;
+ __u32 flags;
+ __u32 reserved[4];
+ char name[RC_KEYTABLE_NAME_SIZE];
+} __packed;
enum rc_driver_type {
RC_DRIVER_SCANCODE = 0, /* Driver or hardware generates a scancode */
@@ -303,7 +326,7 @@ enum rc_filter_type {
* @get_ir_tx: allow driver to provide tx settings
* @set_ir_tx: allow driver to change tx settings
*/
-#define RC_MAX_KEYTABLES 1
+#define RC_MAX_KEYTABLES 32
struct rc_dev {
struct device dev;
struct cdev cdev;
@@ -367,6 +390,7 @@ struct rc_dev {
* @node: used to iterate over all keytables for a rc_dev device
* @dev: the rc_dev device this keytable belongs to
* @idev: the input_dev device which belongs to this keytable
+ * @name: the user-friendly name of this keytable
* @rc_map: holds the scancode <-> keycode mappings
* @keypressed: whether a key is currently pressed or not
* @keyup_jiffies: when the key should be auto-released
@@ -381,6 +405,7 @@ struct rc_keytable {
struct list_head node;
struct rc_dev *dev;
struct input_dev *idev;
+ char name[RC_KEYTABLE_NAME_SIZE];
struct rc_map rc_map;
bool keypressed;
unsigned long keyup_jiffies;
--
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