doxygen: unify use of \file across the board

Considering the various styles and implications found in the sources, edit
scores of files to follow the same API doc guidelines around the doxygen
grouping and the \file tag.

Many files now show a short description in the generated API doc that was so
far only available as C comment.

The guidelines and reasoning behind it is documented at
https://osmocom.org/projects/cellular-infrastructure/wiki/Guidelines_for_API_documentation

In some instances, remove file comments and add to the corresponding group
instead, to be shared among several files (e.g. bitvec).

Change-Id: Ifa70e77e90462b5eb2b0457c70fd25275910c72b

5 files changed, 38 insertions, 47 deletions

diff --git a/src/coding/gsm0503_coding.c b/src/coding/gsm0503_coding.c
index bb86b2c7..5213dc5f 100644
--- a/src/coding/gsm0503_coding.c
+++ b/src/coding/gsm0503_coding.c
@@ -100,9 +100,8 @@
  *  various other modules (mapping, parity, interleaving) in order to
  *  implement the complete channel coding (and decoding) chain for the
  *  various channel types as defined in TS 05.03 / 45.003.
- */
-
-/*! \file gsm0503_coding.c */
+ *
+ * \file gsm0503_coding.c */
 
 /*
  * EGPRS coding limits
diff --git a/src/coding/gsm0503_interleaving.c b/src/coding/gsm0503_interleaving.c
index 19e68474..b42f242d 100644
--- a/src/coding/gsm0503_interleaving.c
+++ b/src/coding/gsm0503_interleaving.c
@@ -29,16 +29,12 @@
 
 /*! \addtogroup interleaving
  *  @{
- *  GSM TS 05.03 interleaving
+ * GSM TS 05.03 interleaving
  *
- *  This module contains interleaving / de-interleaving routines for
- *  various channel types, as defined in 3GPP TS 05.03 / 45.003
- */
-
-/*! \file gsm0503_interleaving.c */
-
-/*
- * GSM xCCH interleaving and burst mapping
+ * This module contains interleaving / de-interleaving routines for
+ * various channel types, as defined in 3GPP TS 05.03 / 45.003.
+ *
+ * GSM xCCH interleaving and burst mapping:
  *
  * Interleaving:
  *
@@ -57,7 +53,30 @@
  *      e(B, 58) = h_n(B)
  *
  * Where hl(B) and hn(B) are bits in burst B indicating flags.
- */
+ *
+ * GSM TCH HR/AHS interleaving and burst mapping:
+ *
+ * Interleaving:
+ *
+ * Given 288 coded input bits, form 4 blocks of 114 bits,
+ * where even bits of the first 2 blocks and odd bits of the last 2 blocks
+ * are used:
+ *
+ *      i(B, j) = c(n, k)       k = 0, ..., 227
+ *                              n = 0, ..., N, N + 1, ...
+ *                              B = B_0 + 2n + b
+ *                              j, b = table[k];
+ *
+ * Mapping on Burst:
+ *
+ *      e(B, j) = i(B, j)
+ *      e(B, 59 + j) = i(B, 57 + j)     j = 0, ..., 56
+ *      e(B, 57) = h_l(B)
+ *      e(B, 58) = h_n(B)
+ *
+ * Where hl(B) and hn(B) are bits in burst B indicating flags.
+ *
+ * \file gsm0503_interleaving.c */
 
 /*! De-Interleave burst bits according to TS 05.03 4.1.4
  *  \param[out] cB caller-allocated output buffer for 456 soft coded bits
@@ -633,30 +652,6 @@ void gsm0503_tch_fr_interleave(const ubit_t *cB, ubit_t *iB)
 	}
 }
 
-/*
- * GSM TCH HR/AHS interleaving and burst mapping
- *
- * Interleaving:
- *
- * Given 288 coded input bits, form 4 blocks of 114 bits,
- * where even bits of the first 2 blocks and odd bits of the last 2 blocks
- * are used:
- *
- *      i(B, j) = c(n, k)       k = 0, ..., 227
- *                              n = 0, ..., N, N + 1, ...
- *                              B = B_0 + 2n + b
- *                              j, b = table[k];
- *
- * Mapping on Burst:
- *
- *      e(B, j) = i(B, j)
- *      e(B, 59 + j) = i(B, 57 + j)     j = 0, ..., 56
- *      e(B, 57) = h_l(B)
- *      e(B, 58) = h_n(B)
- *
- * Where hl(B) and hn(B) are bits in burst B indicating flags.
- */
-
 /*! GSM TCH HR/AHS De-Interleaving and burst mapping
  *  \param[out] cB caller-allocated buffer for 228 unpacked output bits
  *  \param[in] iB 228 unpacked interleaved input bits */
diff --git a/src/coding/gsm0503_mapping.c b/src/coding/gsm0503_mapping.c
index 15fd1b6e..d414769f 100644
--- a/src/coding/gsm0503_mapping.c
+++ b/src/coding/gsm0503_mapping.c
@@ -32,9 +32,8 @@
  *
  *  This module contains burst mapping routines as specified in 3GPP TS
  *  05.03 / 45.003.
- */
-
-/*! \file gsm0503_mapping.c */
+ *
+ * \file gsm0503_mapping.c */
 
 void gsm0503_xcch_burst_unmap(sbit_t *iB, const sbit_t *eB,
 	sbit_t *hl, sbit_t *hn)
diff --git a/src/coding/gsm0503_parity.c b/src/coding/gsm0503_parity.c
index cc817024..b57caa30 100644
--- a/src/coding/gsm0503_parity.c
+++ b/src/coding/gsm0503_parity.c
@@ -31,9 +31,8 @@
  *
  *  This module contains parity/crc code definitions for the various
  *  parity/crc schemes as defined in 3GPP TS 05.03 / 45.003
- */
-
-/*! \file gsm0503_parity.c */
+ *
+ * \file gsm0503_parity.c */
 
 /*! GSM (SACCH) parity (FIRE code)
  *
diff --git a/src/coding/gsm0503_tables.c b/src/coding/gsm0503_tables.c
index 32d12eae..dda8cad1 100644
--- a/src/coding/gsm0503_tables.c
+++ b/src/coding/gsm0503_tables.c
@@ -27,14 +27,13 @@
 /*! \addtogroup tables
  *  @{
  *
- *  GSM TS 05.03 tables
+ *  GSM TS 05.03 tables.
  *
  *  This module contains various tables defining parts of 3GPP TS 05.03
  *  / 45.003, primarily for the purpose of (de)puncturing, interleaving,
  *  etc.
- */
-
-/*! \file gsm0503_tables.c */
+ *
+ * \file gsm0503_tables.c */
 
 const ubit_t gsm0503_pdtch_hl_hn_ubit[4][8] = {
 	{ 1,1, 1,1, 1,1, 1,1 },