once again same topic.
after short discussion with felix domke on irc,
we found that the attached solution is more suitable.
also comments are welcome.
regards
marcel
# HG changeset patch
# User Marcel Siegert <mws@xxxxxxxxxxx>
# Date Wed Feb 22 22:26:35 2006 +0200
# Node ID de50adc80fa00d9da4c7d9887ff6a023c3aca61e
# parent: f13939e6120ba64013534c5f3c37700db2354026
v4l-dvb_add_dvbs2_capabilities.patch
From: Marcel Siegert <mws@xxxxxxxxxxx>
renamed the fe_type enums to report system instead of used modulation type
added new fe_caps enumerations to report new caps for dvb-s2 - fec_rates / modulation types
added new fe_code_rates introduced for dvb-s2 by ETSI 300468 V1.7.1
added new modulation types from ETSI 300468 V1.7.1
added new rolloff_factor enums - also defined in ETSI 300468 V1.7.1
renamed dvb_XXXX_parameters to their corresponding fe_type values
added new dvb_dvbs2_parameters struct
for all renamed flags/enums added backwards compatibility defines
added the FE_SET_MODE ioctl that is needed to differ between DVB-S and DVB-S2 tuning modes
as on DVB-S2 frontends both modes are supported.
this ioctl is ONLY needed that we can use the same dvb_frontend_parameters struct,
also extended for the dvbs2_params but with backwards compatibility.
on normal "old" frontends (DVB-S/C/T/ATSC) the FE_SET_MODE ioctl is not needed,
because these frontend drivers do know about the actual size they will receive/send via the
FE_SET_FRONTEND/FE_GET_FRONTEND ioctl's.
so backwards compatibility is kept. only an application that has dvb-s2 support will
have to use the FE_SET_MODE ioctl explicit to tell the driver what type it should be.
Signed-off-by: Marcel Siegert <mws@xxxxxxxxxxx>
--- a/linux/include/linux/dvb/frontend.h Sun Feb 19 11:07:47 2006 -0300
+++ b/linux/include/linux/dvb/frontend.h Wed Feb 22 22:26:35 2006 +0200
@@ -30,12 +30,16 @@
typedef enum fe_type {
- FE_QPSK,
- FE_QAM,
- FE_OFDM,
- FE_ATSC
+ FE_DVB_S,
+ FE_DVB_C,
+ FE_DVB_T,
+ FE_ATSC,
+ FE_DVB_S2
} fe_type_t;
+#define FE_QPSK FE_DVB_S
+#define FE_QAM FE_DVB_C
+#define FE_OFDM FE_DVB_T
typedef enum fe_caps {
FE_IS_STUPID = 0,
@@ -62,6 +66,11 @@ typedef enum fe_caps {
FE_CAN_HIERARCHY_AUTO = 0x100000,
FE_CAN_8VSB = 0x200000,
FE_CAN_16VSB = 0x400000,
+ FE_CAN_QPSK8 = 0x800000,
+ FE_CAN_FEC_3_5 = 0x1000000,
+ FE_CAN_FEC_4_5 = 0x2000000,
+ FE_CAN_FEC_9_10 = 0x4000000,
+ FE_CAN_QPSKB = 0x8000000,
FE_NEEDS_BENDING = 0x20000000, // not supported anymore, don't use (frontend requires frequency bending)
FE_CAN_RECOVER = 0x40000000, // frontend can recover from a cable unplug automatically
FE_CAN_MUTE_TS = 0x80000000 // frontend can stop spurious TS data output
@@ -147,7 +156,10 @@ typedef enum fe_code_rate {
FEC_6_7,
FEC_7_8,
FEC_8_9,
- FEC_AUTO
+ FEC_AUTO,
+ FEC_3_5,
+ FEC_4_5,
+ FEC_9_10
} fe_code_rate_t;
@@ -160,8 +172,16 @@ typedef enum fe_modulation {
QAM_256,
QAM_AUTO,
VSB_8,
- VSB_16
+ VSB_16,
+ QPSK_8,
+ QPSK_B
} fe_modulation_t;
+
+typedef enum fe_rolloff_factor {
+ ROLLOFF_ALPHA_0_35,
+ ROLLOFF_ALPHA_0_25,
+ ROLLOFF_ALPHA_0_20
+} fe_rolloff_factor_t;
typedef enum fe_transmit_mode {
TRANSMISSION_MODE_2K,
@@ -195,12 +215,12 @@ typedef enum fe_hierarchy {
} fe_hierarchy_t;
-struct dvb_qpsk_parameters {
+struct dvb_dvbs_parameters {
__u32 symbol_rate; /* symbol rate in Symbols per second */
fe_code_rate_t fec_inner; /* forward error correction (see above) */
};
-struct dvb_qam_parameters {
+struct dvb_dvbc_parameters {
__u32 symbol_rate; /* symbol rate in Symbols per second */
fe_code_rate_t fec_inner; /* forward error correction (see above) */
fe_modulation_t modulation; /* modulation type (see above) */
@@ -210,7 +230,7 @@ struct dvb_vsb_parameters {
fe_modulation_t modulation; /* modulation type (see above) */
};
-struct dvb_ofdm_parameters {
+struct dvb_dvbt_parameters {
fe_bandwidth_t bandwidth;
fe_code_rate_t code_rate_HP; /* high priority stream code rate */
fe_code_rate_t code_rate_LP; /* low priority stream code rate */
@@ -220,19 +240,29 @@ struct dvb_ofdm_parameters {
fe_hierarchy_t hierarchy_information;
};
+struct dvb_dvbs2_parameters {
+ __u32 symbol_rate; /* symbol rate in Symbols per second */
+ fe_code_rate_t fec_inner; /* forward error correction (see above) */
+ fe_rolloff_factor_t rolloff_factor; /* rolloff factor needed for dvb-s2 */
+ fe_modulation_t modulation; /* modulation type (see above) */
+};
+
+#define dvb_qpsk_parameters dvb_dvbs_parameters
+#define dvb_qam_parameters dvb_dvbc_parameters
+#define dvb_ofdm_parameters dvb_dvbt_parameters
struct dvb_frontend_parameters {
__u32 frequency; /* (absolute) frequency in Hz for QAM/OFDM/ATSC */
/* intermediate frequency in kHz for QPSK */
fe_spectral_inversion_t inversion;
union {
- struct dvb_qpsk_parameters qpsk;
- struct dvb_qam_parameters qam;
- struct dvb_ofdm_parameters ofdm;
+ struct dvb_dvbs_parameters qpsk;
+ struct dvb_dvbc_parameters qam;
+ struct dvb_dvbt_parameters ofdm;
struct dvb_vsb_parameters vsb;
+ struct dvb_dvbs2_parameters qpsk2;
} u;
};
-
struct dvb_frontend_event {
fe_status_t status;
@@ -270,6 +300,8 @@ struct dvb_frontend_event {
#define FE_SET_FRONTEND _IOW('o', 76, struct dvb_frontend_parameters)
#define FE_GET_FRONTEND _IOR('o', 77, struct dvb_frontend_parameters)
#define FE_SET_FRONTEND_TUNE_MODE _IO('o', 81) /* unsigned int */
+#define FE_SET_MODE _IO('o', 82) /* fe_type_t */
+
#define FE_GET_EVENT _IOR('o', 78, struct dvb_frontend_event)
#define FE_DISHNETWORK_SEND_LEGACY_CMD _IO('o', 80) /* unsigned int */
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