V4L/DVB (8985): S2API: Added dvb frontend changes to support a newer tuning API

This is an experimental patch to add a new tuning mechanism for
dvb frontends. Rather than passing fixed structures across the
user/kernel boundary, which need to be revised for each new modulation
type (or feature the kernel developers want to add), this implements
a simpler message based approach, allowing fe commands to be broken
down into a series of small fixed size transactions, presented
in an array.

The goal is to avoid changing the user/kernel ABI in the future, by
simply creating new frontend commands (and sequencies of commands) that
help us add support for brand new demodulator, delivery system or
statistics related commmands.

known issues:
checkpatch voilations
feedback from various developers yet to be implemented, relating
to namespace conventions, variable length array passing conventions,
and generally some optimization.

This patch should support all existing tuning mechanisms through the
new API, as well as adding 8PSK, DVB-S2 NBC-QPSK and ISDB-T API support.

For testing and exercise purposes, see the latest tune.c tool
available from http://www.steventoth.net/linux/s2

Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 128 insertions, 2 deletions

diff --git a/include/linux/dvb/frontend.h b/include/linux/dvb/frontend.h
index c8cbd90ba375..4d3770021736 100644
--- a/include/linux/dvb/frontend.h
+++ b/include/linux/dvb/frontend.h
@@ -62,6 +62,7 @@ typedef enum fe_caps {
         FE_CAN_HIERARCHY_AUTO           = 0x100000,
         FE_CAN_8VSB                     = 0x200000,
         FE_CAN_16VSB                    = 0x400000,
+        FE_HAS_EXTENDED_CAPS            = 0x800000,   // We need more bitspace for newer APIs, indicate this.
         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 +148,9 @@ typedef enum fe_code_rate {
         FEC_6_7,
         FEC_7_8,
         FEC_8_9,
-        FEC_AUTO
+        FEC_AUTO,
+        FEC_3_5,
+        FEC_9_10,
 } fe_code_rate_t;
 
 
@@ -160,7 +163,11 @@ typedef enum fe_modulation {
         QAM_256,
         QAM_AUTO,
         VSB_8,
-        VSB_16
+        VSB_16,
+        _8PSK,
+        _16APSK,
+        NBC_QPSK,
+        DQPSK,
 } fe_modulation_t;
 
 typedef enum fe_transmit_mode {
@@ -239,6 +246,125 @@ struct dvb_frontend_event {
         struct dvb_frontend_parameters parameters;
 };
 
+/* TODO: Turn this into a series of defines, so future maintainers
+ * don't insert random new commands and break backwards
+ * binary compatability.
+ */
+typedef enum tv_cmd_types {
+        TV_SEQ_UNDEFINED,
+        TV_SEQ_START,
+        TV_SEQ_CONTINUE,
+        TV_SEQ_COMPLETE,
+        TV_SEQ_TERMINATE,
+
+        TV_SET_FREQUENCY,
+        TV_SET_MODULATION,
+        TV_SET_BANDWIDTH,
+        TV_SET_INVERSION,
+        TV_SET_DISEQC_MASTER,
+        TV_SET_SYMBOLRATE,
+        TV_SET_INNERFEC,
+        TV_SET_VOLTAGE,
+        TV_SET_TONE,
+        TV_SET_PILOT,
+        TV_SET_ROLLOFF,
+
+        TV_GET_FREQUENCY,
+        TV_GET_MODULATION,
+        TV_GET_BANDWIDTH,
+        TV_GET_INVERSION,
+        TV_GET_DISEQC_SLAVE_REPLY,
+        TV_GET_SYMBOLRATE,
+        TV_GET_INNERFEC,
+        TV_GET_VOLTAGE,
+        TV_GET_TONE,
+        TV_GET_PILOT,
+        TV_GET_ROLLOFF,
+
+        /* Basic enumeration set for querying unlimited capabilities */
+        TV_GET_FE_CAPABILITY_COUNT,
+        TV_GET_FE_CAPABILITY,
+
+        /* New commands are always appended */
+        TV_SET_DELIVERY_SYSTEM,
+        TV_GET_DELIVERY_SYSTEM,
+
+        /* ISDB-T */
+        TV_SET_ISDB_SEGMENT_NUM,
+        TV_GET_ISDB_SEGMENT_NUM,
+        TV_SET_ISDB_SEGMENT_WIDTH,
+        TV_GET_ISDB_SEGMENT_WIDTH,
+        TV_GET_ISDB_LAYERA_FEC,
+        TV_GET_ISDB_LAYERA_MODULATION,
+        TV_GET_ISDB_LAYERA_SEGMENT_WIDTH,
+        TV_GET_ISDB_LAYERB_FEC,
+        TV_GET_ISDB_LAYERB_MODULATION,
+        TV_GET_ISDB_LAYERB_SEGMENT_WIDTH,
+        TV_GET_ISDB_LAYERC_FEC,
+        TV_GET_ISDB_LAYERC_MODULATION,
+        TV_GET_ISDB_LAYERC_SEGMENT_WIDTH,
+
+} tv_cmd_types_t;
+
+typedef enum fe_pilot {
+        PILOT_ON,
+        PILOT_OFF,
+        PILOT_AUTO,
+} fe_pilot_t;
+
+typedef enum fe_rolloff {
+        ROLLOFF_20,
+        ROLLOFF_25,
+        ROLLOFF_35,
+        ROLLOFF_AUTO,
+} fe_rolloff_t;
+
+typedef enum fe_delivery_system {
+        SYS_UNDEFINED,
+        SYS_DVBC_ANNEX_AC,
+        SYS_DVBC_ANNEX_B,
+        SYS_DVBT,
+        SYS_DVBS,
+        SYS_DVBS2,
+        SYS_DVBH,
+        SYS_ISDBT,
+        SYS_ISDBS,
+        SYS_ISDBC,
+        SYS_ATSC,
+        SYS_ATSCMH,
+        SYS_DMBTH,
+        SYS_CMMB,
+        SYS_DAB,
+} fe_delivery_system_t;
+
+struct tv_cmds_h {
+        char    *name;          /* A display name for debugging purposes */
+
+        __u32   cmd;            /* A unique ID */
+
+        /* Flags */
+        __u32   set:1;          /* Either a set or get property */
+        __u32   buffer:1;       /* Does this property use the buffer? */
+        __u32   reserved:30;    /* Align */
+};
+
+typedef struct {
+        __u32 cmd;
+        union {
+                __u32 data;
+                struct {
+                        __u8 data[32];
+                        __u32 len;
+                } buffer;
+        } u;
+} tv_property_t;
+
+/* No more than 16 properties during any given ioctl */
+typedef tv_property_t tv_properties_t[16];
+
+#define FE_SET_PROPERTY            _IOW('o', 82, tv_properties_t)
+#define FE_GET_PROPERTY            _IOR('o', 83, tv_properties_t)
+
 
 /**
  * When set, this flag will disable any zigzagging or other "normal" tuning