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V4L/DVB: ir-core: allow specifying multiple protocols at one open/write

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With this change, it is now possible to do something like:
        su -c 'echo "none +rc-5 +nec" > /sys/class/rc/rc1/protocols'

This prevents the need of multiple opens, one for each protocol change,
and makes userspace application easier.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2010-06-28 13:52:07 -03:00
parent 5f1247972e
commit de8592bd53
1 changed files with 49 additions and 49 deletions
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98
drivers/media/IR/ir-sysfs.c
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@ -117,61 +117,62 @@ static ssize_t store_protocols(struct device *d,
const char *tmp;
u64 type;
u64 mask;
int rc, i;
int rc, i, count = 0;
unsigned long flags;
tmp = skip_spaces(data);
if (*tmp == '\0') {
IR_dprintk(1, "Protocol not specified\n");
return -EINVAL;
} else if (*tmp == '+') {
enable = true;
disable = false;
tmp++;
} else if (*tmp == '-') {
enable = false;
disable = true;
tmp++;
} else {
enable = false;
disable = false;
}
if (!enable && !disable && !strncasecmp(tmp, PROTO_NONE, sizeof(PROTO_NONE))) {
mask = 0;
tmp += sizeof(PROTO_NONE);
} else {
for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
if (!strncasecmp(tmp, proto_names[i].name, strlen(proto_names[i].name))) {
tmp += strlen(proto_names[i].name);
mask = proto_names[i].type;
break;
}
}
if (i == ARRAY_SIZE(proto_names)) {
IR_dprintk(1, "Unknown protocol\n");
return -EINVAL;
}
}
tmp = skip_spaces(tmp);
if (*tmp != '\0') {
IR_dprintk(1, "Invalid trailing characters\n");
return -EINVAL;
}
if (ir_dev->props->driver_type == RC_DRIVER_SCANCODE)
type = ir_dev->rc_tab.ir_type;
else
type = ir_dev->raw->enabled_protocols;
if (enable)
type |= mask;
else if (disable)
type &= ~mask;
else
type = mask;
while ((tmp = strsep((char **) &data, " \n")) != NULL) {
if (!*tmp)
break;
if (*tmp == '+') {
enable = true;
disable = false;
tmp++;
} else if (*tmp == '-') {
enable = false;
disable = true;
tmp++;
} else {
enable = false;
disable = false;
}
if (!enable && !disable && !strncasecmp(tmp, PROTO_NONE, sizeof(PROTO_NONE))) {
tmp += sizeof(PROTO_NONE);
mask = 0;
count++;
} else {
for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
if (!strncasecmp(tmp, proto_names[i].name, strlen(proto_names[i].name))) {
tmp += strlen(proto_names[i].name);
mask = proto_names[i].type;
break;
}
}
if (i == ARRAY_SIZE(proto_names)) {
IR_dprintk(1, "Unknown protocol: '%s'\n", tmp);
return -EINVAL;
}
count++;
}
if (enable)
type |= mask;
else if (disable)
type &= ~mask;
else
type = mask;
}
if (!count) {
IR_dprintk(1, "Protocol not specified\n");
return -EINVAL;
}
if (ir_dev->props && ir_dev->props->change_protocol) {
rc = ir_dev->props->change_protocol(ir_dev->props->priv,
@ -191,7 +192,6 @@ static ssize_t store_protocols(struct device *d,
ir_dev->raw->enabled_protocols = type;
}
IR_dprintk(1, "Current protocol(s): 0x%llx\n",
(long long)type);