[PATCH 28/43] rc-core: add ioctls for adding/removing keytables from userspace
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 <david@xxxxxxxxxxx>
---
drivers/media/rc/rc-core-priv.h | 3 +
drivers/media/rc/rc-keytable.c | 6 ++-
drivers/media/rc/rc-main.c | 82 +++++++++++++++++++++++++++++++++++----
include/media/rc-core.h | 27 ++++++++++++-
4 files changed, 107 insertions(+), 11 deletions(-)
diff --git a/drivers/media/rc/rc-core-priv.h b/drivers/media/rc/rc-core-priv.h
index 7aaa1bf..8006c2e 100644
--- a/drivers/media/rc/rc-core-priv.h
+++ b/drivers/media/rc/rc-core-priv.h
@@ -156,7 +156,8 @@ 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,
u64 scancode, u8 toggle, bool autokeyup);
-struct rc_keytable *rc_keytable_create(struct rc_dev *dev, const char *map_name);
+struct rc_keytable *rc_keytable_create(struct rc_dev *dev, const char *name,
+ const char *map_name);
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 f422a3b..bdb60f4 100644
--- a/drivers/media/rc/rc-keytable.c
+++ b/drivers/media/rc/rc-keytable.c
@@ -818,6 +818,7 @@ static void rc_input_close(struct input_dev *idev)
/**
* rc_keytable_create() - creates a new keytable
* @dev: the struct rc_dev device this keytable should belong to
+ * @name: the userfriendly name of this keymap
* @map_name: the name of the keymap to autoload
* @return: a new struct rc_keytable pointer or NULL on error
*
@@ -825,7 +826,9 @@ 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, const char *map_name)
+struct rc_keytable *rc_keytable_create(struct rc_dev *dev,
+ const char *name,
+ const char *map_name)
{
struct rc_keytable *kt;
struct input_dev *idev = NULL;
@@ -842,6 +845,7 @@ struct rc_keytable *rc_keytable_create(struct rc_dev *dev, const char *map_name)
kt->idev = idev;
kt->dev = dev;
+ 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 47e778b..a9c7226 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -496,7 +496,8 @@ void rc_free_device(struct rc_dev *dev)
}
EXPORT_SYMBOL_GPL(rc_free_device);
-static int rc_add_keytable(struct rc_dev *dev, const char *map_name)
+static int rc_add_keytable(struct rc_dev *dev, const char *name,
+ const char *map_name)
{
struct rc_keytable *kt;
unsigned i;
@@ -508,7 +509,7 @@ static int rc_add_keytable(struct rc_dev *dev, const char *map_name)
if (i >= ARRAY_SIZE(dev->keytables))
return -ENFILE;
- kt = rc_keytable_create(dev, map_name);
+ kt = rc_keytable_create(dev, name, map_name);
if (!kt)
return -ENOMEM;
@@ -518,19 +519,21 @@ static int rc_add_keytable(struct rc_dev *dev, const char *map_name)
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;
-
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;
}
int rc_register_device(struct rc_dev *dev)
@@ -593,7 +596,7 @@ int rc_register_device(struct rc_dev *dev)
if (rc)
goto out_chardev;
- rc = rc_add_keytable(dev, dev->map_name);
+ rc = rc_add_keytable(dev, dev->map_name, dev->map_name);
if (rc < 0)
goto out_device;
@@ -938,6 +941,8 @@ 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) {
@@ -999,8 +1004,69 @@ 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;
}
diff --git a/include/media/rc-core.h b/include/media/rc-core.h
index 0844e17..1852b47 100644
--- a/include/media/rc-core.h
+++ b/include/media/rc-core.h
@@ -152,6 +152,29 @@ 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 */
@@ -254,7 +277,7 @@ struct ir_raw_event {
* @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;
const char *input_name;
@@ -308,6 +331,7 @@ 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
@@ -322,6 +346,7 @@ 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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