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authorHenrik Kurelid <henrik@kurelid.se>2010-03-01 11:56:42 (GMT)
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-10-23 03:35:49 (GMT)
commit52065c513a8a15fc0fb1fe2452256303edaece74 (patch)
tree29de3a9b7744b0d86fa59f409be2fd1f238d9435
parent4363a0b8343747a429df526249d2f3194403365c (diff)
[media] firedtv: add parameter to fake ca_system_ids in CA_INFO
The Digital Everywhere firmware have the shortcoming that ca_info_enq and ca_info are not supported. This means that we can never retrieve the correct ca_system_id to present in the CI message CA_INFO. Currently the driver uses the application id retrieved using app_info_req and app_info, but this id only match the correct ca_system_id as given in ca_info in some cases. This patch adds a parameter to the driver in order for the user to override what will be returned in the CA_INFO CI message. Up to four ca_system_ids can be specified. This is needed for users with CAMs that have different manufacturer id and ca_system_id and that uses applications that take this into account, like MythTV. Signed-off-by: Henrik Kurelid <henrik@kurelid.se> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r--drivers/media/dvb/firewire/firedtv-avc.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/drivers/media/dvb/firewire/firedtv-avc.c b/drivers/media/dvb/firewire/firedtv-avc.c
index 1f3d1fb..f0f1842 100644
--- a/drivers/media/dvb/firewire/firedtv-avc.c
+++ b/drivers/media/dvb/firewire/firedtv-avc.c
@@ -132,6 +132,20 @@ MODULE_PARM_DESC(debug, "Verbose logging (none = 0"
", FCP payloads = " __stringify(AVC_DEBUG_FCP_PAYLOADS)
", or a combination, or all = -1)");
+/*
+ * This is a workaround since there is no vendor specific command to retrieve
+ * ca_info using AVC. If this parameter is not used, ca_system_id will be
+ * filled with application_manufacturer from ca_app_info.
+ * Digital Everywhere have said that adding ca_info is on their TODO list.
+ */
+static unsigned int num_fake_ca_system_ids;
+static int fake_ca_system_ids[4] = { -1, -1, -1, -1 };
+module_param_array(fake_ca_system_ids, int, &num_fake_ca_system_ids, 0644);
+MODULE_PARM_DESC(fake_ca_system_ids, "If your CAM application manufacturer "
+ "does not have the same ca_system_id as your CAS, you can "
+ "override what ca_system_ids are presented to the "
+ "application by setting this field to an array of ids.");
+
static const char *debug_fcp_ctype(unsigned int ctype)
{
static const char *ctypes[] = {
@@ -999,7 +1013,7 @@ int avc_ca_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
{
struct avc_command_frame *c = (void *)fdtv->avc_data;
struct avc_response_frame *r = (void *)fdtv->avc_data;
- int pos, ret;
+ int i, pos, ret;
mutex_lock(&fdtv->avc_mutex);
@@ -1026,9 +1040,18 @@ int avc_ca_info(struct firedtv *fdtv, char *app_info, unsigned int *len)
app_info[0] = (EN50221_TAG_CA_INFO >> 16) & 0xff;
app_info[1] = (EN50221_TAG_CA_INFO >> 8) & 0xff;
app_info[2] = (EN50221_TAG_CA_INFO >> 0) & 0xff;
- app_info[3] = 2;
- app_info[4] = r->operand[pos + 0];
- app_info[5] = r->operand[pos + 1];
+ if (num_fake_ca_system_ids == 0) {
+ app_info[3] = 2;
+ app_info[4] = r->operand[pos + 0];
+ app_info[5] = r->operand[pos + 1];
+ } else {
+ app_info[3] = num_fake_ca_system_ids * 2;
+ for (i = 0; i < num_fake_ca_system_ids; i++) {
+ app_info[4 + i * 2] =
+ (fake_ca_system_ids[i] >> 8) & 0xff;
+ app_info[5 + i * 2] = fake_ca_system_ids[i] & 0xff;
+ }
+ }
*len = app_info[3] + 4;
out:
mutex_unlock(&fdtv->avc_mutex);

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