Em 28-04-2011 12:13, David Härdeman escreveu:
> The RC_TYPE_* defines are currently used both where a single protocol is
> expected and where a bitmap of protocols is expected. This patch tries
> to separate the two in preparation for the following patches.
>
> Signed-off-by: David Härdeman <[email protected]>
Most of the patch is just renaming stuff. So, I'm commenting just the
rc-main.c/rc-map.h changes.
> diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
> index 5b4422e..5a182b2 100644
> --- a/drivers/media/rc/rc-main.c
> +++ b/drivers/media/rc/rc-main.c
> @@ -102,7 +102,7 @@ static struct rc_map_list empty_map = {
> .map = {
> .scan = empty,
> .size = ARRAY_SIZE(empty),
> - .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */
> + .rc_type = RC_BIT_UNKNOWN, /* Legacy IR type */
> .name = RC_MAP_EMPTY,
> }
> };
> @@ -725,14 +725,17 @@ static struct {
> u64 type;
> char *name;
> } proto_names[] = {
> - { RC_TYPE_UNKNOWN, "unknown" },
> - { RC_TYPE_RC5, "rc-5" },
> - { RC_TYPE_NEC, "nec" },
> - { RC_TYPE_RC6, "rc-6" },
> - { RC_TYPE_JVC, "jvc" },
> - { RC_TYPE_SONY, "sony" },
> - { RC_TYPE_RC5_SZ, "rc-5-sz" },
> - { RC_TYPE_LIRC, "lirc" },
> + { RC_BIT_OTHER, "other" },
> + { RC_BIT_RC5, "rc-5" },
> + { RC_BIT_RC5X, "rc-5-x" },
> + { RC_BIT_RC5_SZ, "rc-5-sz" },
> + { RC_BIT_RC6, "rc-6" },
> + { RC_BIT_JVC, "jvc" },
> + { RC_BIT_SONY12, "sony12" },
> + { RC_BIT_SONY15, "sony15" },
> + { RC_BIT_SONY20, "sony20" },
> + { RC_BIT_NEC, "nec" },
> + { RC_BIT_LIRC, "lirc" },
> };
There are some API breakages on the above. We shouln't do it, except
if strictly required, and, if we'll do it, we need to do it via
Documentation/feature-removal-schedule.txt.
There are two types of breakages on the above:
1) the removal of "unknown" and "sony" types;
2) the behaviour change of "rc-5" (that, currently, means
both rc-5 and rc-5x.
Also, while you've mapped rc5/sony variants, nec variants weren't mapped.
IMO, what we should do on the above is:
1) preserve the "unknown";
2) use "rc-5", "sony", "nec" with the meaning that they will
enable all variants of those protocols;
3) add a new set of protocols to indicate subsets, like "sony:20",
"rc-5:normal", "rc5:x", etc.
4) if you're changing the interface, please submit a patch also
to v4l-utils, adding a logic there to handle the changes.
>
> #define PROTO_NONE "none"
> diff --git a/include/media/rc-map.h b/include/media/rc-map.h
> index 9184751..2c68ca6 100644
> --- a/include/media/rc-map.h
> +++ b/include/media/rc-map.h
> @@ -11,19 +11,36 @@
>
> #include <linux/input.h>
>
> -#define RC_TYPE_UNKNOWN 0
> -#define RC_TYPE_RC5 (1 << 0) /* Philips RC5 protocol */
> -#define RC_TYPE_NEC (1 << 1)
> -#define RC_TYPE_RC6 (1 << 2) /* Philips RC6 protocol */
> -#define RC_TYPE_JVC (1 << 3) /* JVC protocol */
> -#define RC_TYPE_SONY (1 << 4) /* Sony12/15/20 protocol */
> -#define RC_TYPE_RC5_SZ (1 << 5) /* RC5 variant used by
> Streamzap */
> -#define RC_TYPE_LIRC (1 << 30) /* Pass raw IR to lirc userspace */
> -#define RC_TYPE_OTHER (1u << 31)
> +#define RC_TYPE_UNKNOWN 0 /* Protocol not known */
> +#define RC_TYPE_OTHER 0 /* Protocol known but
> proprietary */
This change doesn't make sense: we should either remove other or use different
bits for different meanings. This is somewhat a mess currently, as there are, in
fact, 3 types of "protocols":
1) reverse-engineered drivers, where developer didn't care to check
what was the used protocol. It is there due to legacy IR handlers,
added before rc-core. The better is to not accept this type anymore
for new devices;
2) Other protocols that don't match at the list of supported protocols.
Reserved for the cases were the developer took the care to check if
the protocol is not NEC/RC-5/... and didn't find any protocol that
matches;
3) Standard protocols with broken hardware. In general, keycode tables
with just 8 bits for RC-5 or NEC, because the hardware uses a cheap
uC (generally KS007 or similar) that only decodes the last 8 bits of
the protocol. As the developer didn't have a full IR decoder, he was
not able to fill the RC/NEC table with the IR address.
The problem with (2) is that it may reflect a temporary state where the protocol
is not yet known. After adding a protocol decoder for it, case (2) turns into
case (1).
So, maybe we can just merge (1) and (2) into the same case: "unknown". Maybe we
should map (3) with a different option, internally (even exporting it as
"unknown"
to userspace), as it helps us to identify such cases and fix it later.
> +#define RC_TYPE_RC5 1 /* Philips RC5 protocol */
> +#define RC_TYPE_RC5X 2 /* Philips RC5x protocol */
> +#define RC_TYPE_RC5_SZ 3 /* StreamZap variant of RC5 */
> +#define RC_TYPE_RC6 4 /* Philips RC6 protocol */
> +#define RC_TYPE_JVC 5 /* JVC protocol */
> +#define RC_TYPE_SONY12 6 /* Sony 12 bit protocol */
> +#define RC_TYPE_SONY15 7 /* Sony 15 bit protocol */
> +#define RC_TYPE_SONY20 8 /* Sony 20 bit protocol */
> +#define RC_TYPE_NEC 9 /* NEC protocol */
> +#define RC_TYPE_LIRC 10 /* Pass raw IR to lirc userspace */
>
> -#define RC_TYPE_ALL (RC_TYPE_RC5 | RC_TYPE_NEC | RC_TYPE_RC6 | \
> - RC_TYPE_JVC | RC_TYPE_SONY | RC_TYPE_LIRC | \
> - RC_TYPE_RC5_SZ | RC_TYPE_OTHER)
> +#define RC_BIT_UNKNOWN (1 << RC_TYPE_UNKNOWN)
> +#define RC_BIT_OTHER (1 << RC_TYPE_OTHER)
> +#define RC_BIT_RC5 (1 << RC_TYPE_RC5)
> +#define RC_BIT_RC5X (1 << RC_TYPE_RC5X)
> +#define RC_BIT_RC5_SZ (1 << RC_TYPE_RC5_SZ)
> +#define RC_BIT_RC6 (1 << RC_TYPE_RC6)
> +#define RC_BIT_JVC (1 << RC_TYPE_JVC)
> +#define RC_BIT_SONY12 (1 << RC_TYPE_SONY12)
> +#define RC_BIT_SONY15 (1 << RC_TYPE_SONY15)
> +#define RC_BIT_SONY20 (1 << RC_TYPE_SONY20)
> +#define RC_BIT_NEC (1 << RC_TYPE_NEC)
> +#define RC_BIT_LIRC (1 << RC_TYPE_LIRC)
> +
> +#define RC_BIT_ALL (RC_BIT_UNKNOWN | RC_BIT_OTHER | RC_BIT_RC5 | \
> + RC_BIT_RC5X | RC_BIT_RC6 | RC_BIT_JVC | \
> + RC_BIT_SONY12 | RC_BIT_SONY15 | RC_BIT_SONY20 | \
> + RC_BIT_NEC | RC_BIT_LIRC)
>
> struct rc_map_table {
> u32 scancode;
>
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Thanks,
Mauro
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