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-rw-r--r--drivers/media/dvb/frontends/cx24123.c565
1 files changed, 396 insertions, 169 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c
index d661c6f9cbe5..691dc840dcc0 100644
--- a/drivers/media/dvb/frontends/cx24123.c
+++ b/drivers/media/dvb/frontends/cx24123.c
@@ -29,6 +29,9 @@
#include "dvb_frontend.h"
#include "cx24123.h"
+#define XTAL 10111000
+
+static int force_band;
static int debug;
#define dprintk(args...) \
do { \
@@ -52,6 +55,7 @@ struct cx24123_state
u32 VGAarg;
u32 bandselectarg;
u32 pllarg;
+ u32 FILTune;
/* The Demod/Tuner can't easily provide these, we cache them */
u32 currentfreq;
@@ -63,43 +67,33 @@ static struct
{
u32 symbolrate_low;
u32 symbolrate_high;
- u32 VCAslope;
- u32 VCAoffset;
- u32 VGA1offset;
- u32 VGA2offset;
u32 VCAprogdata;
u32 VGAprogdata;
+ u32 FILTune;
} cx24123_AGC_vals[] =
{
{
.symbolrate_low = 1000000,
.symbolrate_high = 4999999,
- .VCAslope = 0x07,
- .VCAoffset = 0x0f,
- .VGA1offset = 0x1f8,
- .VGA2offset = 0x1f8,
- .VGAprogdata = (2 << 18) | (0x1f8 << 9) | 0x1f8,
- .VCAprogdata = (4 << 18) | (0x07 << 9) | 0x07,
+ /* the specs recommend other values for VGA offsets,
+ but tests show they are wrong */
+ .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
+ .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x07,
+ .FILTune = 0x27f /* 0.41 V */
},
{
.symbolrate_low = 5000000,
.symbolrate_high = 14999999,
- .VCAslope = 0x1f,
- .VCAoffset = 0x1f,
- .VGA1offset = 0x1e0,
- .VGA2offset = 0x180,
- .VGAprogdata = (2 << 18) | (0x180 << 9) | 0x1e0,
- .VCAprogdata = (4 << 18) | (0x07 << 9) | 0x1f,
+ .VGAprogdata = (1 << 19) | (0x180 << 9) | 0x1e0,
+ .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x1f,
+ .FILTune = 0x317 /* 0.90 V */
},
{
.symbolrate_low = 15000000,
.symbolrate_high = 45000000,
- .VCAslope = 0x3f,
- .VCAoffset = 0x3f,
- .VGA1offset = 0x180,
- .VGA2offset = 0x100,
- .VGAprogdata = (2 << 18) | (0x100 << 9) | 0x180,
- .VCAprogdata = (4 << 18) | (0x07 << 9) | 0x3f,
+ .VGAprogdata = (1 << 19) | (0x100 << 9) | 0x180,
+ .VCAprogdata = (2 << 19) | (0x07 << 9) | 0x3f,
+ .FILTune = 0x145 /* 2.70 V */
},
};
@@ -112,91 +106,80 @@ static struct
{
u32 freq_low;
u32 freq_high;
- u32 bandselect;
u32 VCOdivider;
- u32 VCOnumber;
u32 progdata;
} cx24123_bandselect_vals[] =
{
+ /* band 1 */
{
.freq_low = 950000,
- .freq_high = 1018999,
- .bandselect = 0x40,
- .VCOdivider = 4,
- .VCOnumber = 7,
- .progdata = (0 << 18) | (0 << 9) | 0x40,
- },
- {
- .freq_low = 1019000,
.freq_high = 1074999,
- .bandselect = 0x80,
.VCOdivider = 4,
- .VCOnumber = 8,
- .progdata = (0 << 18) | (0 << 9) | 0x80,
+ .progdata = (0 << 19) | (0 << 9) | 0x40,
},
+
+ /* band 2 */
{
.freq_low = 1075000,
- .freq_high = 1227999,
- .bandselect = 0x01,
- .VCOdivider = 2,
- .VCOnumber = 1,
- .progdata = (0 << 18) | (1 << 9) | 0x01,
+ .freq_high = 1177999,
+ .VCOdivider = 4,
+ .progdata = (0 << 19) | (0 << 9) | 0x80,
},
+
+ /* band 3 */
{
- .freq_low = 1228000,
- .freq_high = 1349999,
- .bandselect = 0x02,
+ .freq_low = 1178000,
+ .freq_high = 1295999,
.VCOdivider = 2,
- .VCOnumber = 2,
- .progdata = (0 << 18) | (1 << 9) | 0x02,
+ .progdata = (0 << 19) | (1 << 9) | 0x01,
},
+
+ /* band 4 */
{
- .freq_low = 1350000,
- .freq_high = 1481999,
- .bandselect = 0x04,
+ .freq_low = 1296000,
+ .freq_high = 1431999,
.VCOdivider = 2,
- .VCOnumber = 3,
- .progdata = (0 << 18) | (1 << 9) | 0x04,
+ .progdata = (0 << 19) | (1 << 9) | 0x02,
},
+
+ /* band 5 */
{
- .freq_low = 1482000,
- .freq_high = 1595999,
- .bandselect = 0x08,
+ .freq_low = 1432000,
+ .freq_high = 1575999,
.VCOdivider = 2,
- .VCOnumber = 4,
- .progdata = (0 << 18) | (1 << 9) | 0x08,
+ .progdata = (0 << 19) | (1 << 9) | 0x04,
},
+
+ /* band 6 */
{
- .freq_low = 1596000,
+ .freq_low = 1576000,
.freq_high = 1717999,
- .bandselect = 0x10,
.VCOdivider = 2,
- .VCOnumber = 5,
- .progdata = (0 << 18) | (1 << 9) | 0x10,
+ .progdata = (0 << 19) | (1 << 9) | 0x08,
},
+
+ /* band 7 */
{
.freq_low = 1718000,
.freq_high = 1855999,
- .bandselect = 0x20,
.VCOdivider = 2,
- .VCOnumber = 6,
- .progdata = (0 << 18) | (1 << 9) | 0x20,
+ .progdata = (0 << 19) | (1 << 9) | 0x10,
},
+
+ /* band 8 */
{
.freq_low = 1856000,
.freq_high = 2035999,
- .bandselect = 0x40,
.VCOdivider = 2,
- .VCOnumber = 7,
- .progdata = (0 << 18) | (1 << 9) | 0x40,
+ .progdata = (0 << 19) | (1 << 9) | 0x20,
},
+
+ /* band 9 */
{
.freq_low = 2036000,
- .freq_high = 2149999,
- .bandselect = 0x80,
+ .freq_high = 2150000,
.VCOdivider = 2,
- .VCOnumber = 8,
- .progdata = (0 << 18) | (1 << 9) | 0x80,
+ .progdata = (0 << 19) | (1 << 9) | 0x40,
},
};
@@ -207,49 +190,44 @@ static struct {
{
{0x00, 0x03}, /* Reset system */
{0x00, 0x00}, /* Clear reset */
- {0x01, 0x3b}, /* Apply sensible defaults, from an i2c sniffer */
- {0x03, 0x07},
- {0x04, 0x10},
- {0x05, 0x04},
- {0x06, 0x31},
- {0x0d, 0x02},
- {0x0e, 0x03},
- {0x0f, 0xfe},
- {0x10, 0x01},
- {0x14, 0x01},
- {0x15, 0x98},
- {0x16, 0x00},
- {0x17, 0x01},
- {0x1b, 0x05},
- {0x1c, 0x80},
- {0x1d, 0x00},
- {0x1e, 0x00},
- {0x20, 0x41},
- {0x21, 0x15},
- {0x27, 0x14},
- {0x28, 0x46},
- {0x29, 0x00},
- {0x2a, 0xb0},
- {0x2b, 0x73},
- {0x2c, 0x00},
+ {0x03, 0x07}, /* QPSK, DVB, Auto Acquisition (default) */
+ {0x04, 0x10}, /* MPEG */
+ {0x05, 0x04}, /* MPEG */
+ {0x06, 0x31}, /* MPEG (default) */
+ {0x0b, 0x00}, /* Freq search start point (default) */
+ {0x0c, 0x00}, /* Demodulator sample gain (default) */
+ {0x0d, 0x02}, /* Frequency search range = Fsymbol / 4 (default) */
+ {0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
+ {0x0f, 0xfe}, /* FEC search mask (all supported codes) */
+ {0x10, 0x01}, /* Default search inversion, no repeat (default) */
+ {0x16, 0x00}, /* Enable reading of frequency */
+ {0x17, 0x01}, /* Enable EsNO Ready Counter */
+ {0x1c, 0x80}, /* Enable error counter */
+ {0x20, 0x00}, /* Tuner burst clock rate = 500KHz */
+ {0x21, 0x15}, /* Tuner burst mode, word length = 0x15 */
+ {0x28, 0x00}, /* Enable FILTERV with positive pol., DiSEqC 2.x off */
+ {0x29, 0x00}, /* DiSEqC LNB_DC off */
+ {0x2a, 0xb0}, /* DiSEqC Parameters (default) */
+ {0x2b, 0x73}, /* DiSEqC Tone Frequency (default) */
+ {0x2c, 0x00}, /* DiSEqC Message (0x2c - 0x31) */
{0x2d, 0x00},
{0x2e, 0x00},
{0x2f, 0x00},
{0x30, 0x00},
{0x31, 0x00},
- {0x32, 0x8c},
- {0x33, 0x00},
+ {0x32, 0x8c}, /* DiSEqC Parameters (default) */
+ {0x33, 0x00}, /* Interrupts off (0x33 - 0x34) */
{0x34, 0x00},
- {0x35, 0x03},
- {0x36, 0x02},
- {0x37, 0x3a},
- {0x3a, 0x00}, /* Enable AGC accumulator */
- {0x44, 0x00},
- {0x45, 0x00},
- {0x46, 0x05},
- {0x56, 0x41},
- {0x57, 0xff},
- {0x67, 0x83},
+ {0x35, 0x03}, /* DiSEqC Tone Amplitude (default) */
+ {0x36, 0x02}, /* DiSEqC Parameters (default) */
+ {0x37, 0x3a}, /* DiSEqC Parameters (default) */
+ {0x3a, 0x00}, /* Enable AGC accumulator (for signal strength) */
+ {0x44, 0x00}, /* Constellation (default) */
+ {0x45, 0x00}, /* Symbol count (default) */
+ {0x46, 0x0d}, /* Symbol rate estimator on (default) */
+ {0x56, 0x41}, /* Various (default) */
+ {0x57, 0xff}, /* Error Counter Window (default) */
+ {0x67, 0x83}, /* Non-DCII symbol clock */
};
static int cx24123_writereg(struct cx24123_state* state, int reg, int data)
@@ -258,6 +236,10 @@ static int cx24123_writereg(struct cx24123_state* state, int reg, int data)
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
int err;
+ if (debug>1)
+ printk("cx24123: %s: write reg 0x%02x, value 0x%02x\n",
+ __FUNCTION__,reg, data);
+
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
printk("%s: writereg error(err == %i, reg == 0x%02x,"
" data == 0x%02x)\n", __FUNCTION__, err, reg, data);
@@ -274,6 +256,10 @@ static int cx24123_writelnbreg(struct cx24123_state* state, int reg, int data)
struct i2c_msg msg = { .addr = 0x08, .flags = 0, .buf = buf, .len = 2 };
int err;
+ if (debug>1)
+ printk("cx24123: %s: writeln addr=0x08, reg 0x%02x, value 0x%02x\n",
+ __FUNCTION__,reg, data);
+
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
printk("%s: writelnbreg error (err == %i, reg == 0x%02x,"
" data == 0x%02x)\n", __FUNCTION__, err, reg, data);
@@ -303,6 +289,9 @@ static int cx24123_readreg(struct cx24123_state* state, u8 reg)
return ret;
}
+ if (debug>1)
+ printk("cx24123: read reg 0x%02x, value 0x%02x\n",reg, ret);
+
return b1[0];
}
@@ -313,17 +302,23 @@ static int cx24123_readlnbreg(struct cx24123_state* state, u8 reg)
static int cx24123_set_inversion(struct cx24123_state* state, fe_spectral_inversion_t inversion)
{
+ u8 nom_reg = cx24123_readreg(state, 0x0e);
+ u8 auto_reg = cx24123_readreg(state, 0x10);
+
switch (inversion) {
case INVERSION_OFF:
- cx24123_writereg(state, 0x0e, cx24123_readreg(state, 0x0e) & 0x7f);
- cx24123_writereg(state, 0x10, cx24123_readreg(state, 0x10) | 0x80);
+ dprintk("%s: inversion off\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg & ~0x80);
+ cx24123_writereg(state, 0x10, auto_reg | 0x80);
break;
case INVERSION_ON:
- cx24123_writereg(state, 0x0e, cx24123_readreg(state, 0x0e) | 0x80);
- cx24123_writereg(state, 0x10, cx24123_readreg(state, 0x10) | 0x80);
+ dprintk("%s: inversion on\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x80);
+ cx24123_writereg(state, 0x10, auto_reg | 0x80);
break;
case INVERSION_AUTO:
- cx24123_writereg(state, 0x10, cx24123_readreg(state, 0x10) & 0x7f);
+ dprintk("%s: inversion auto\n",__FUNCTION__);
+ cx24123_writereg(state, 0x10, auto_reg & ~0x80);
break;
default:
return -EINVAL;
@@ -338,92 +333,191 @@ static int cx24123_get_inversion(struct cx24123_state* state, fe_spectral_invers
val = cx24123_readreg(state, 0x1b) >> 7;
- if (val == 0)
+ if (val == 0) {
+ dprintk("%s: read inversion off\n",__FUNCTION__);
*inversion = INVERSION_OFF;
- else
+ } else {
+ dprintk("%s: read inversion on\n",__FUNCTION__);
*inversion = INVERSION_ON;
+ }
return 0;
}
static int cx24123_set_fec(struct cx24123_state* state, fe_code_rate_t fec)
{
+ u8 nom_reg = cx24123_readreg(state, 0x0e) & ~0x07;
+
if ( (fec < FEC_NONE) || (fec > FEC_AUTO) )
fec = FEC_AUTO;
- /* Hardware has 5/11 and 3/5 but are never unused */
switch (fec) {
- case FEC_NONE:
- return cx24123_writereg(state, 0x0f, 0x01);
case FEC_1_2:
- return cx24123_writereg(state, 0x0f, 0x02);
+ dprintk("%s: set FEC to 1/2\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x01);
+ cx24123_writereg(state, 0x0f, 0x02);
+ break;
case FEC_2_3:
- return cx24123_writereg(state, 0x0f, 0x04);
+ dprintk("%s: set FEC to 2/3\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x02);
+ cx24123_writereg(state, 0x0f, 0x04);
+ break;
case FEC_3_4:
- return cx24123_writereg(state, 0x0f, 0x08);
+ dprintk("%s: set FEC to 3/4\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x03);
+ cx24123_writereg(state, 0x0f, 0x08);
+ break;
+ case FEC_4_5:
+ dprintk("%s: set FEC to 4/5\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x04);
+ cx24123_writereg(state, 0x0f, 0x10);
+ break;
case FEC_5_6:
- return cx24123_writereg(state, 0x0f, 0x20);
+ dprintk("%s: set FEC to 5/6\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x05);
+ cx24123_writereg(state, 0x0f, 0x20);
+ break;
+ case FEC_6_7:
+ dprintk("%s: set FEC to 6/7\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x06);
+ cx24123_writereg(state, 0x0f, 0x40);
+ break;
case FEC_7_8:
- return cx24123_writereg(state, 0x0f, 0x80);
+ dprintk("%s: set FEC to 7/8\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0e, nom_reg | 0x07);
+ cx24123_writereg(state, 0x0f, 0x80);
+ break;
case FEC_AUTO:
- return cx24123_writereg(state, 0x0f, 0xae);
+ dprintk("%s: set FEC to auto\n",__FUNCTION__);
+ cx24123_writereg(state, 0x0f, 0xfe);
+ break;
default:
return -EOPNOTSUPP;
}
+
+ return 0;
}
static int cx24123_get_fec(struct cx24123_state* state, fe_code_rate_t *fec)
{
int ret;
- u8 val;
ret = cx24123_readreg (state, 0x1b);
if (ret < 0)
return ret;
- val = ret & 0x07;
- switch (val) {
+ ret = ret & 0x07;
+
+ switch (ret) {
case 1:
*fec = FEC_1_2;
break;
- case 3:
+ case 2:
*fec = FEC_2_3;
break;
- case 4:
+ case 3:
*fec = FEC_3_4;
break;
- case 5:
+ case 4:
*fec = FEC_4_5;
break;
- case 6:
+ case 5:
*fec = FEC_5_6;
break;
+ case 6:
+ *fec = FEC_6_7;
+ break;
case 7:
*fec = FEC_7_8;
break;
- case 2: /* *fec = FEC_3_5; break; */
- case 0: /* *fec = FEC_5_11; break; */
- *fec = FEC_AUTO;
- break;
default:
- *fec = FEC_NONE; // can't happen
+ /* this can happen when there's no lock */
+ *fec = FEC_NONE;
}
return 0;
}
-/* fixme: Symbol rates < 3MSps may not work because of precision loss */
+/* Approximation of closest integer of log2(a/b). It actually gives the
+ lowest integer i such that 2^i >= round(a/b) */
+static u32 cx24123_int_log2(u32 a, u32 b)
+{
+ u32 exp, nearest = 0;
+ u32 div = a / b;
+ if(a % b >= b / 2) ++div;
+ if(div < (1 << 31))
+ {
+ for(exp = 1; div > exp; nearest++)
+ exp += exp;
+ }
+ return nearest;
+}
+
static int cx24123_set_symbolrate(struct cx24123_state* state, u32 srate)
{
- u32 val;
+ u32 tmp, sample_rate, ratio, sample_gain;
+ u8 pll_mult;
+
+ /* check if symbol rate is within limits */
+ if ((srate > state->ops.info.symbol_rate_max) ||
+ (srate < state->ops.info.symbol_rate_min))
+ return -EOPNOTSUPP;;
+
+ /* choose the sampling rate high enough for the required operation,
+ while optimizing the power consumed by the demodulator */
+ if (srate < (XTAL*2)/2)
+ pll_mult = 2;
+ else if (srate < (XTAL*3)/2)
+ pll_mult = 3;
+ else if (srate < (XTAL*4)/2)
+ pll_mult = 4;
+ else if (srate < (XTAL*5)/2)
+ pll_mult = 5;
+ else if (srate < (XTAL*6)/2)
+ pll_mult = 6;
+ else if (srate < (XTAL*7)/2)
+ pll_mult = 7;
+ else if (srate < (XTAL*8)/2)
+ pll_mult = 8;
+ else
+ pll_mult = 9;
+
+
+ sample_rate = pll_mult * XTAL;
+
+ /*
+ SYSSymbolRate[21:0] = (srate << 23) / sample_rate
+
+ We have to use 32 bit unsigned arithmetic without precision loss.
+ The maximum srate is 45000000 or 0x02AEA540. This number has
+ only 6 clear bits on top, hence we can shift it left only 6 bits
+ at a time. Borrowed from cx24110.c
+ */
+
+ tmp = srate << 6;
+ ratio = tmp / sample_rate;
+
+ tmp = (tmp % sample_rate) << 6;
+ ratio = (ratio << 6) + (tmp / sample_rate);
+
+ tmp = (tmp % sample_rate) << 6;
+ ratio = (ratio << 6) + (tmp / sample_rate);
+
+ tmp = (tmp % sample_rate) << 5;
+ ratio = (ratio << 5) + (tmp / sample_rate);
+
+
+ cx24123_writereg(state, 0x01, pll_mult * 6);
- val = (srate / 1185) * 100;
+ cx24123_writereg(state, 0x08, (ratio >> 16) & 0x3f );
+ cx24123_writereg(state, 0x09, (ratio >> 8) & 0xff );
+ cx24123_writereg(state, 0x0a, (ratio ) & 0xff );
- /* Compensate for scaling up, by removing 17 symbols per 1Msps */
- val = val - (17 * (srate / 1000000));
+ /* also set the demodulator sample gain */
+ sample_gain = cx24123_int_log2(sample_rate, srate);
+ tmp = cx24123_readreg(state, 0x0c) & ~0xe0;
+ cx24123_writereg(state, 0x0c, tmp | sample_gain << 5);
- cx24123_writereg(state, 0x08, (val >> 16) & 0xff );
- cx24123_writereg(state, 0x09, (val >> 8) & 0xff );
- cx24123_writereg(state, 0x0a, (val ) & 0xff );
+ dprintk("%s: srate=%d, ratio=0x%08x, sample_rate=%i sample_gain=%d\n", __FUNCTION__, srate, ratio, sample_rate, sample_gain);
return 0;
}
@@ -437,6 +531,9 @@ static int cx24123_pll_calculate(struct dvb_frontend* fe, struct dvb_frontend_pa
struct cx24123_state *state = fe->demodulator_priv;
u32 ndiv = 0, adiv = 0, vco_div = 0;
int i = 0;
+ int pump = 2;
+ int band = 0;
+ int num_bands = sizeof(cx24123_bandselect_vals) / sizeof(cx24123_bandselect_vals[0]);
/* Defaults for low freq, low rate */
state->VCAarg = cx24123_AGC_vals[0].VCAprogdata;
@@ -444,38 +541,49 @@ static int cx24123_pll_calculate(struct dvb_frontend* fe, struct dvb_frontend_pa
state->bandselectarg = cx24123_bandselect_vals[0].progdata;
vco_div = cx24123_bandselect_vals[0].VCOdivider;
- /* For the given symbolerate, determine the VCA and VGA programming bits */
+ /* For the given symbol rate, determine the VCA, VGA and FILTUNE programming bits */
for (i = 0; i < sizeof(cx24123_AGC_vals) / sizeof(cx24123_AGC_vals[0]); i++)
{
if ((cx24123_AGC_vals[i].symbolrate_low <= p->u.qpsk.symbol_rate) &&
- (cx24123_AGC_vals[i].symbolrate_high >= p->u.qpsk.symbol_rate) ) {
+ (cx24123_AGC_vals[i].symbolrate_high >= p->u.qpsk.symbol_rate) ) {
state->VCAarg = cx24123_AGC_vals[i].VCAprogdata;
state->VGAarg = cx24123_AGC_vals[i].VGAprogdata;
+ state->FILTune = cx24123_AGC_vals[i].FILTune;
}
}
- /* For the given frequency, determine the bandselect programming bits */
- for (i = 0; i < sizeof(cx24123_bandselect_vals) / sizeof(cx24123_bandselect_vals[0]); i++)
+ /* determine the band to use */
+ if(force_band < 1 || force_band > num_bands)
{
- if ((cx24123_bandselect_vals[i].freq_low <= p->frequency) &&
- (cx24123_bandselect_vals[i].freq_high >= p->frequency) ) {
- state->bandselectarg = cx24123_bandselect_vals[i].progdata;
- vco_div = cx24123_bandselect_vals[i].VCOdivider;
+ for (i = 0; i < num_bands; i++)
+ {
+ if ((cx24123_bandselect_vals[i].freq_low <= p->frequency) &&
+ (cx24123_bandselect_vals[i].freq_high >= p->frequency) )
+ band = i;
}
}
+ else
+ band = force_band - 1;
+
+ state->bandselectarg = cx24123_bandselect_vals[band].progdata;
+ vco_div = cx24123_bandselect_vals[band].VCOdivider;
+
+ /* determine the charge pump current */
+ if ( p->frequency < (cx24123_bandselect_vals[band].freq_low + cx24123_bandselect_vals[band].freq_high)/2 )
+ pump = 0x01;
+ else
+ pump = 0x02;
/* Determine the N/A dividers for the requested lband freq (in kHz). */
- /* Note: 10111 (kHz) is the Crystal Freq and divider of 10. */
- ndiv = ( ((p->frequency * vco_div) / (10111 / 10) / 2) / 32) & 0x1ff;
- adiv = ( ((p->frequency * vco_div) / (10111 / 10) / 2) % 32) & 0x1f;
+ /* Note: the reference divider R=10, frequency is in KHz, XTAL is in Hz */
+ ndiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) / 32) & 0x1ff;
+ adiv = ( ((p->frequency * vco_div * 10) / (2 * XTAL / 1000)) % 32) & 0x1f;
if (adiv == 0)
- adiv++;
+ ndiv++;
- /* determine the correct pll frequency values. */
- /* Command 11, refdiv 11, cpump polarity 1, cpump current 3mA 10. */
- state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (2 << 14);
- state->pllarg |= (ndiv << 5) | adiv;
+ /* control bits 11, refdiv 11, charge pump polarity 1, charge pump current, ndiv, adiv */
+ state->pllarg = (3 << 19) | (3 << 17) | (1 << 16) | (pump << 14) | (ndiv << 5) | adiv;
return 0;
}
@@ -489,6 +597,8 @@ static int cx24123_pll_writereg(struct dvb_frontend* fe, struct dvb_frontend_par
struct cx24123_state *state = fe->demodulator_priv;
unsigned long timeout;
+ dprintk("%s: pll writereg called, data=0x%08x\n",__FUNCTION__,data);
+
/* align the 21 bytes into to bit23 boundary */
data = data << 3;
@@ -538,6 +648,9 @@ static int cx24123_pll_writereg(struct dvb_frontend* fe, struct dvb_frontend_par
static int cx24123_pll_tune(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
struct cx24123_state *state = fe->demodulator_priv;
+ u8 val;
+
+ dprintk("frequency=%i\n", p->frequency);
if (cx24123_pll_calculate(fe, p) != 0) {
printk("%s: cx24123_pll_calcutate failed\n",__FUNCTION__);
@@ -552,6 +665,14 @@ static int cx24123_pll_tune(struct dvb_frontend* fe, struct dvb_frontend_paramet
cx24123_pll_writereg(fe, p, state->bandselectarg);
cx24123_pll_writereg(fe, p, state->pllarg);
+ /* set the FILTUNE voltage */
+ val = cx24123_readreg(state, 0x28) & ~0x3;
+ cx24123_writereg(state, 0x27, state->FILTune >> 2);
+ cx24123_writereg(state, 0x28, val | (state->FILTune & 0x3));
+
+ dprintk("%s: pll tune VCA=%d, band=%d, pll=%d\n",__FUNCTION__,state->VCAarg,
+ state->bandselectarg,state->pllarg);
+
return 0;
}
@@ -560,6 +681,8 @@ static int cx24123_initfe(struct dvb_frontend* fe)
struct cx24123_state *state = fe->demodulator_priv;
int i;
+ dprintk("%s: init frontend\n",__FUNCTION__);
+
/* Configure the demod to a good set of defaults */
for (i = 0; i < sizeof(cx24123_regdata) / sizeof(cx24123_regdata[0]); i++)
cx24123_writereg(state, cx24123_regdata[i].reg, cx24123_regdata[i].data);
@@ -587,10 +710,13 @@ static int cx24123_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage
switch (voltage) {
case SEC_VOLTAGE_13:
+ dprintk("%s: isl6421 voltage = 13V\n",__FUNCTION__);
return cx24123_writelnbreg(state, 0x0, val & 0x32); /* V 13v */
case SEC_VOLTAGE_18:
+ dprintk("%s: isl6421 voltage = 18V\n",__FUNCTION__);
return cx24123_writelnbreg(state, 0x0, val | 0x04); /* H 18v */
case SEC_VOLTAGE_OFF:
+ dprintk("%s: isl5421 voltage off\n",__FUNCTION__);
return cx24123_writelnbreg(state, 0x0, val & 0x30);
default:
return -EINVAL;
@@ -624,13 +750,93 @@ static int cx24123_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage
return 0;
}
-static int cx24123_send_diseqc_msg(struct dvb_frontend* fe,
- struct dvb_diseqc_master_cmd *cmd)
+/* wait for diseqc queue to become ready (or timeout) */
+static void cx24123_wait_for_diseqc(struct cx24123_state *state)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(200);
+ while (!(cx24123_readreg(state, 0x29) & 0x40)) {
+ if(time_after(jiffies, timeout)) {
+ printk("%s: diseqc queue not ready, command may be lost.\n", __FUNCTION__);
+ break;
+ }
+ msleep(10);
+ }
+}
+
+static int cx24123_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
{
- /* fixme: Implement diseqc */
- printk("%s: No support yet\n",__FUNCTION__);
+ struct cx24123_state *state = fe->demodulator_priv;
+ int i, val;
+
+ dprintk("%s:\n",__FUNCTION__);
+
+ /* check if continuous tone has been stopped */
+ if (state->config->use_isl6421)
+ val = cx24123_readlnbreg(state, 0x00) & 0x10;
+ else
+ val = cx24123_readreg(state, 0x29) & 0x10;
- return -ENOTSUPP;
+
+ if (val) {
+ printk("%s: ERROR: attempt to send diseqc command before tone is off\n", __FUNCTION__);
+ return -ENOTSUPP;
+ }
+
+ /* wait for diseqc queue ready */
+ cx24123_wait_for_diseqc(state);
+
+ /* select tone mode */
+ cx24123_writereg(state, 0x2a, cx24123_readreg(state, 0x2a) & 0xf8);
+
+ for (i = 0; i < cmd->msg_len; i++)
+ cx24123_writereg(state, 0x2C + i, cmd->msg[i]);
+
+ val = cx24123_readreg(state, 0x29);
+ cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40) | ((cmd->msg_len-3) & 3));
+
+ /* wait for diseqc message to finish sending */
+ cx24123_wait_for_diseqc(state);
+
+ return 0;
+}
+
+static int cx24123_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
+{
+ struct cx24123_state *state = fe->demodulator_priv;
+ int val;
+
+ dprintk("%s:\n", __FUNCTION__);
+
+ /* check if continuous tone has been stoped */
+ if (state->config->use_isl6421)
+ val = cx24123_readlnbreg(state, 0x00) & 0x10;
+ else
+ val = cx24123_readreg(state, 0x29) & 0x10;
+
+
+ if (val) {
+ printk("%s: ERROR: attempt to send diseqc command before tone is off\n", __FUNCTION__);
+ return -ENOTSUPP;
+ }
+
+ cx24123_wait_for_diseqc(state);
+
+ /* select tone mode */
+ val = cx24123_readreg(state, 0x2a) & 0xf8;
+ cx24123_writereg(state, 0x2a, val | 0x04);
+
+ val = cx24123_readreg(state, 0x29);
+
+ if (burst == SEC_MINI_A)
+ cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x00));
+ else if (burst == SEC_MINI_B)
+ cx24123_writereg(state, 0x29, ((val & 0x90) | 0x40 | 0x08));
+ else
+ return -EINVAL;
+
+ cx24123_wait_for_diseqc(state);
+
+ return 0;
}
static int cx24123_read_status(struct dvb_frontend* fe, fe_status_t* status)
@@ -642,13 +848,15 @@ static int cx24123_read_status(struct dvb_frontend* fe, fe_status_t* status)
*status = 0;
if (lock & 0x01)
- *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
+ *status |= FE_HAS_SIGNAL;
+ if (sync & 0x02)
+ *status |= FE_HAS_CARRIER;
if (sync & 0x04)
*status |= FE_HAS_VITERBI;
if (sync & 0x08)
- *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_SYNC;
if (sync & 0x80)
- *status |= FE_HAS_SYNC | FE_HAS_LOCK;
+ *status |= FE_HAS_LOCK;
return 0;
}
@@ -681,6 +889,8 @@ static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber)
else
state->snr = 0;
+ dprintk("%s: BER = %d, S/N index = %d\n",__FUNCTION__,state->lastber, state->snr);
+
*ber = state->lastber;
return 0;
@@ -691,6 +901,8 @@ static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_str
struct cx24123_state *state = fe->demodulator_priv;
*signal_strength = cx24123_readreg(state, 0x3b) << 8; /* larger = better */
+ dprintk("%s: Signal strength = %d\n",__FUNCTION__,*signal_strength);
+
return 0;
}
@@ -699,6 +911,8 @@ static int cx24123_read_snr(struct dvb_frontend* fe, u16* snr)
struct cx24123_state *state = fe->demodulator_priv;
*snr = state->snr;
+ dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr);
+
return 0;
}
@@ -707,6 +921,8 @@ static int cx24123_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
struct cx24123_state *state = fe->demodulator_priv;
*ucblocks = state->lastber;
+ dprintk("%s: ucblocks (ber) = %d\n",__FUNCTION__,*ucblocks);
+
return 0;
}
@@ -714,6 +930,8 @@ static int cx24123_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_par
{
struct cx24123_state *state = fe->demodulator_priv;
+ dprintk("%s: set_frontend\n",__FUNCTION__);
+
if (state->config->set_ts_params)
state->config->set_ts_params(fe, 0);
@@ -737,6 +955,8 @@ static int cx24123_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_par
{
struct cx24123_state *state = fe->demodulator_priv;
+ dprintk("%s: get_frontend\n",__FUNCTION__);
+
if (cx24123_get_inversion(state, &p->inversion) != 0) {
printk("%s: Failed to get inversion status\n",__FUNCTION__);
return -EREMOTEIO;
@@ -763,8 +983,10 @@ static int cx24123_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
switch (tone) {
case SEC_TONE_ON:
+ dprintk("%s: isl6421 sec tone on\n",__FUNCTION__);
return cx24123_writelnbreg(state, 0x0, val | 0x10);
case SEC_TONE_OFF:
+ dprintk("%s: isl6421 sec tone off\n",__FUNCTION__);
return cx24123_writelnbreg(state, 0x0, val & 0x2f);
default:
printk("%s: CASE reached default with tone=%d\n", __FUNCTION__, tone);
@@ -855,12 +1077,13 @@ static struct dvb_frontend_ops cx24123_ops = {
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 1011, /* kHz for QPSK frontends */
- .frequency_tolerance = 29500,
+ .frequency_tolerance = 5000,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
- FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+ FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
+ FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_RECOVER
},
@@ -875,12 +1098,16 @@ static struct dvb_frontend_ops cx24123_ops = {
.read_snr = cx24123_read_snr,
.read_ucblocks = cx24123_read_ucblocks,
.diseqc_send_master_cmd = cx24123_send_diseqc_msg,
+ .diseqc_send_burst = cx24123_diseqc_send_burst,
.set_tone = cx24123_set_tone,
.set_voltage = cx24123_set_voltage,
};
module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
+
+module_param(force_band, int, 0644);
+MODULE_PARM_DESC(force_band, "Force a specific band select (1-9, default:off).");
MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24123/cx24109 hardware");
MODULE_AUTHOR("Steven Toth");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.