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提交 d0dcc2da 编写于 作者: M Mauro Carvalho Chehab
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[media] mt2063: Remove the code for more than one adjacent mt2063 tuners 

Such code is disabled via ifdef's. Also, they're ugly and rely
on some static structures. Just remove. If ever needed, the git
log can be used to recover it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
上级 dcd52d20
隐藏空白更改
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Showing with 1 addition and 327 deletion
drivers/media/common/tuners/mt2063.c
浏览文件 @ d0dcc2da
......@@ -35,11 +35,6 @@ module_param(verbose, int, 0644);
/* Info: Downconverter frequency is out of range (may be reason for MT_DPC_UNLOCK) */
#define MT2063_DNC_RANGE (0x08000000)
#define MAX_UDATA (4294967295) /* max value storable in u32 */
#define MT2063_TUNER_CNT (1) /* total num of MicroTuner tuners */
#define MT2063_I2C (0xC0)
/*
* Data Types
*/
......@@ -810,8 +805,6 @@ static int MT2063_Sleep(struct dvb_frontend *fe)
**
*****************************************************************************/
/* Version of this module */
#define MT2063_SPUR_VERSION 10201 /* Version 01.21 */
/* Implement ceiling, floor functions. */
#define ceil(n, d) (((n) < 0) ? (-((-(n))/(d))) : (n)/(d) + ((n)%(d) != 0))
......@@ -824,53 +817,15 @@ struct MT2063_FIFZone_t {
s32 max_;
};
#if MT2063_TUNER_CNT > 1
static struct MT2063_AvoidSpursData_t *TunerList[MT2063_TUNER_CNT];
static u32 TunerCount = 0;
#endif
static u32 MT2063_RegisterTuner(struct MT2063_AvoidSpursData_t *pAS_Info)
{
#if MT2063_TUNER_CNT == 1
pAS_Info->nAS_Algorithm = 1;
return 0;
#else
u32 index;
pAS_Info->nAS_Algorithm = 2;
/*
** Check to see if tuner is already registered
*/
for (index = 0; index < TunerCount; index++) {
if (TunerList[index] == pAS_Info) {
return 0; /* Already here - no problem */
}
}
/*
** Add tuner to list - if there is room.
*/
if (TunerCount < MT2063_TUNER_CNT) {
TunerList[TunerCount] = pAS_Info;
TunerCount++;
return 0;
} else
return -ENODEV;
#endif
}
static void MT2063_UnRegisterTuner(struct MT2063_AvoidSpursData_t *pAS_Info)
{
#if MT2063_TUNER_CNT > 1
u32 index;
for (index = 0; index < TunerCount; index++) {
if (TunerList[index] == pAS_Info) {
TunerList[index] = TunerList[--TunerCount];
}
}
#endif
}
/*
......@@ -883,10 +838,6 @@ static void MT2063_UnRegisterTuner(struct MT2063_AvoidSpursData_t *pAS_Info)
static void MT2063_ResetExclZones(struct MT2063_AvoidSpursData_t *pAS_Info)
{
u32 center;
#if MT2063_TUNER_CNT > 1
u32 index;
struct MT2063_AvoidSpursData_t *adj;
#endif
pAS_Info->nZones = 0; /* this clears the used list */
pAS_Info->usedZones = NULL; /* reset ptr */
......@@ -945,38 +896,6 @@ static void MT2063_ResetExclZones(struct MT2063_AvoidSpursData_t *pAS_Info)
MT2063_AddExclZone(pAS_Info, 1882820000 - pAS_Info->f_in, 1884220000 - pAS_Info->f_in); /* Ctr = 1883.52 */
MT2063_AddExclZone(pAS_Info, 1881092000 - pAS_Info->f_in, 1882492000 - pAS_Info->f_in); /* Ctr = 1881.792 */
}
#if MT2063_TUNER_CNT > 1
/*
** Iterate through all adjacent tuners and exclude frequencies related to them
*/
for (index = 0; index < TunerCount; ++index) {
adj = TunerList[index];
if (pAS_Info == adj) /* skip over our own data, don't process it */
continue;
/*
** Add 1st IF exclusion zone covering adjacent tuner's LO2
** at "adjfLO2 + f_out" +/- m_MinLOSpacing
*/
if (adj->f_LO2 != 0)
MT2063_AddExclZone(pAS_Info,
(adj->f_LO2 + pAS_Info->f_out) -
pAS_Info->f_min_LO_Separation,
(adj->f_LO2 + pAS_Info->f_out) +
pAS_Info->f_min_LO_Separation);
/*
** Add 1st IF exclusion zone covering adjacent tuner's LO1
** at "adjfLO1 - f_in" +/- m_MinLOSpacing
*/
if (adj->f_LO1 != 0)
MT2063_AddExclZone(pAS_Info,
(adj->f_LO1 - pAS_Info->f_in) -
pAS_Info->f_min_LO_Separation,
(adj->f_LO1 - pAS_Info->f_in) +
pAS_Info->f_min_LO_Separation);
}
#endif
}
static struct MT2063_ExclZone_t *InsertNode(struct MT2063_AvoidSpursData_t
......@@ -1285,215 +1204,6 @@ static u32 MT2063_umax(u32 a, u32 b)
return (a >= b) ? a : b;
}
#if MT2063_TUNER_CNT > 1
static s32 RoundAwayFromZero(s32 n, s32 d)
{
return (n < 0) ? floor(n, d) : ceil(n, d);
}
/****************************************************************************
**
** Name: IsSpurInAdjTunerBand
**
** Description: Checks to see if a spur will be present within the IF's
** bandwidth or near the zero IF.
** (fIFOut +/- fIFBW/2, -fIFOut +/- fIFBW/2)
** and
** (0 +/- fZIFBW/2)
**
** ma mb me mf mc md
** <--+-+-+-----------------+-+-+-----------------+-+-+-->
** | ^ 0 ^ |
** ^ b=-fIFOut+fIFBW/2 -b=+fIFOut-fIFBW/2 ^
** a=-fIFOut-fIFBW/2 -a=+fIFOut+fIFBW/2
**
** Note that some equations are doubled to prevent round-off
** problems when calculating fIFBW/2
**
** The spur frequencies are computed as:
**
** fSpur = n * f1 - m * f2 - fOffset
**
** Parameters: f1 - The 1st local oscillator (LO) frequency
** of the tuner whose output we are examining
** f2 - The 1st local oscillator (LO) frequency
** of the adjacent tuner
** fOffset - The 2nd local oscillator of the tuner whose
** output we are examining
** fIFOut - Output IF center frequency
** fIFBW - Output IF Bandwidth
** nMaxH - max # of LO harmonics to search
** fp - If spur, positive distance to spur-free band edge (returned)
** fm - If spur, negative distance to spur-free band edge (returned)
**
** Returns: 1 if an LO spur would be present, otherwise 0.
**
** Dependencies: None.
**
** Revision History:
**
** SCR Date Author Description
** -------------------------------------------------------------------------
** N/A 01-21-2005 JWS Original, adapted from MT_DoubleConversion.
** 115 03-23-2007 DAD Fix declaration of spur due to truncation
** errors.
** 137 06-18-2007 DAD Ver 1.16: Fix possible divide-by-0 error for
** multi-tuners that have
** (delta IF1) > (f_out-f_outbw/2).
** 177 S 02-26-2008 RSK Ver 1.18: Corrected calculation using LO1 > MAX/2
** Type casts added to preserve correct sign.
**
****************************************************************************/
static u32 IsSpurInAdjTunerBand(u32 bIsMyOutput,
u32 f1,
u32 f2,
u32 fOffset,
u32 fIFOut,
u32 fIFBW,
u32 fZIFBW,
u32 nMaxH, u32 * fp, u32 * fm)
{
u32 bSpurFound = 0;
const u32 fHalf_IFBW = fIFBW / 2;
const u32 fHalf_ZIFBW = fZIFBW / 2;
/* Calculate a scale factor for all frequencies, so that our
calculations all stay within 31 bits */
const u32 f_Scale =
((f1 +
(fOffset + fIFOut +
fHalf_IFBW) / nMaxH) / (MAX_UDATA / 2 / nMaxH)) + 1;
/*
** After this scaling, _f1, _f2, and _f3 are guaranteed to fit into
** signed data types (smaller than MAX_UDATA/2)
*/
const s32 _f1 = (s32) (f1 / f_Scale);
const s32 _f2 = (s32) (f2 / f_Scale);
const s32 _f3 = (s32) (fOffset / f_Scale);
const s32 c = (s32) (fIFOut - fHalf_IFBW) / (s32) f_Scale;
const s32 d = (s32) ((fIFOut + fHalf_IFBW) / f_Scale);
const s32 f = (s32) (fHalf_ZIFBW / f_Scale);
s32 ma, mb, mc, md, me, mf;
s32 fp_ = 0;
s32 fm_ = 0;
s32 n;
/*
** If the other tuner does not have an LO frequency defined,
** assume that we cannot interfere with it
*/
if (f2 == 0)
return 0;
/* Check out all multiples of f1 from -nMaxH to +nMaxH */
for (n = -(s32) nMaxH; n <= (s32) nMaxH; ++n) {
const s32 nf1 = n * _f1;
md = (_f3 + d - nf1) / _f2;
/* If # f2 harmonics > nMaxH, then no spurs present */
if (md <= -(s32) nMaxH)
break;
ma = (_f3 - d - nf1) / _f2;
if ((ma == md) || (ma >= (s32) (nMaxH)))
continue;
mc = (_f3 + c - nf1) / _f2;
if (mc != md) {
const s32 m = (n < 0) ? md : mc;
const s32 fspur = (nf1 + m * _f2 - _f3);
const s32 den = (bIsMyOutput ? n - 1 : n);
if (den == 0) {
fp_ = (d - fspur) * f_Scale;
fm_ = (fspur - c) * f_Scale;
} else {
fp_ =
(s32) RoundAwayFromZero((d - fspur) *
f_Scale, den);
fm_ =
(s32) RoundAwayFromZero((fspur - c) *
f_Scale, den);
}
if (((u32) abs(fm_) >= f_Scale)
&& ((u32) abs(fp_) >= f_Scale)) {
bSpurFound = 1;
break;
}
}
/* Location of Zero-IF-spur to be checked */
mf = (_f3 + f - nf1) / _f2;
me = (_f3 - f - nf1) / _f2;
if (me != mf) {
const s32 m = (n < 0) ? mf : me;
const s32 fspur = (nf1 + m * _f2 - _f3);
const s32 den = (bIsMyOutput ? n - 1 : n);
if (den == 0) {
fp_ = (d - fspur) * f_Scale;
fm_ = (fspur - c) * f_Scale;
} else {
fp_ =
(s32) RoundAwayFromZero((f - fspur) *
f_Scale, den);
fm_ =
(s32) RoundAwayFromZero((fspur + f) *
f_Scale, den);
}
if (((u32) abs(fm_) >= f_Scale)
&& ((u32) abs(fp_) >= f_Scale)) {
bSpurFound = 1;
break;
}
}
mb = (_f3 - c - nf1) / _f2;
if (ma != mb) {
const s32 m = (n < 0) ? mb : ma;
const s32 fspur = (nf1 + m * _f2 - _f3);
const s32 den = (bIsMyOutput ? n - 1 : n);
if (den == 0) {
fp_ = (d - fspur) * f_Scale;
fm_ = (fspur - c) * f_Scale;
} else {
fp_ =
(s32) RoundAwayFromZero((-c - fspur) *
f_Scale, den);
fm_ =
(s32) RoundAwayFromZero((fspur + d) *
f_Scale, den);
}
if (((u32) abs(fm_) >= f_Scale)
&& ((u32) abs(fp_) >= f_Scale)) {
bSpurFound = 1;
break;
}
}
}
/*
** Verify that fm & fp are both positive
** Add one to ensure next 1st IF choice is not right on the edge
*/
if (fp_ < 0) {
*fp = -fm_ + 1;
*fm = -fp_ + 1;
} else if (fp_ > 0) {
*fp = fp_ + 1;
*fm = fm_ + 1;
} else {
*fp = 1;
*fm = abs(fm_) + 1;
}
return bSpurFound;
}
#endif
/****************************************************************************
**
** Name: IsSpurInBand
......@@ -1539,16 +1249,11 @@ static u32 IsSpurInBand(struct MT2063_AvoidSpursData_t *pAS_Info,
const u32 d = pAS_Info->f_out + pAS_Info->f_out_bw / 2;
const u32 c = d - pAS_Info->f_out_bw;
const u32 f = pAS_Info->f_zif_bw / 2;
const u32 f_Scale = (f_LO1 / (MAX_UDATA / 2 / pAS_Info->maxH1)) + 1;
const u32 f_Scale = (f_LO1 / (UINT_MAX / 2 / pAS_Info->maxH1)) + 1;
s32 f_nsLO1, f_nsLO2;
s32 f_Spur;
u32 ma, mb, mc, md, me, mf;
u32 lo_gcd, gd_Scale, gc_Scale, gf_Scale, hgds, hgfs, hgcs;
#if MT2063_TUNER_CNT > 1
u32 index;
struct MT2063_AvoidSpursData_t *adj;
#endif
*fm = 0;
/*
......@@ -1628,37 +1333,6 @@ static u32 IsSpurInBand(struct MT2063_AvoidSpursData_t *pAS_Info,
}
}
#if MT2063_TUNER_CNT > 1
/* If no spur found, see if there are more tuners on the same board */
for (index = 0; index < TunerCount; ++index) {
adj = TunerList[index];
if (pAS_Info == adj) /* skip over our own data, don't process it */
continue;
/* Look for LO-related spurs from the adjacent tuner generated into my IF output */
if (IsSpurInAdjTunerBand(1, /* check my IF output */
pAS_Info->f_LO1, /* my fLO1 */
adj->f_LO1, /* the other tuner's fLO1 */
pAS_Info->f_LO2, /* my fLO2 */
pAS_Info->f_out, /* my fOut */
pAS_Info->f_out_bw, /* my output IF bandwidth */
pAS_Info->f_zif_bw, /* my Zero-IF bandwidth */
pAS_Info->maxH2, fp, /* minimum amount to move LO's positive */
fm)) /* miminum amount to move LO's negative */
return 1;
/* Look for LO-related spurs from my tuner generated into the adjacent tuner's IF output */
if (IsSpurInAdjTunerBand(0, /* check his IF output */
pAS_Info->f_LO1, /* my fLO1 */
adj->f_LO1, /* the other tuner's fLO1 */
adj->f_LO2, /* the other tuner's fLO2 */
adj->f_out, /* the other tuner's fOut */
adj->f_out_bw, /* the other tuner's output IF bandwidth */
pAS_Info->f_zif_bw, /* the other tuner's Zero-IF bandwidth */
adj->maxH2, fp, /* minimum amount to move LO's positive */
fm)) /* miminum amount to move LO's negative */
return 1;
}
#endif
/* No spurs found */
return 0;
}
......
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