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[media] it913x-fe: correct tuner settings 

Correct tuner settings for more accuracy. This now makes the tuner
 section more compatible with other versions of the IT913X
 series.

TODOs
Version 2 chip

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
tvboxspy 2011-09-21 19:06:58 -03:00 committed by Mauro Carvalho Chehab
parent 2ba0f94796
commit 7c2808e2fd
2 changed files with 113 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/media/dvb/frontends/it913x-fe-priv.h
View File

@ -316,27 +316,13 @@ static struct it913xset it9137_set[] = {
{0xff, 0x0000, {0x00}, 0x00}, /* Terminating Entry */
};
static struct it913xset it9137_tuner[] = {
{PRO_DMOD, 0xec57, {0x00}, 0x01},
{PRO_DMOD, 0xec58, {0x00}, 0x01},
{PRO_DMOD, 0xec40, {0x00}, 0x01},
{PRO_DMOD, 0xec02, { 0x00, 0x0c, 0x00, 0x40, 0x00, 0x80, 0x80,
0x00, 0x00, 0x00, 0x00 }, 0x0b},
{PRO_DMOD, 0xec0d, { 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 }, 0x0b},
{PRO_DMOD, 0xec19, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00}, 0x08},
{PRO_DMOD, 0xec22, { 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00 }, 0x0a},
{PRO_DMOD, 0xec3f, {0x01}, 0x01},
/* Clear any existing tune */
{PRO_DMOD, 0xec4c, {0xa8, 0x00, 0x00, 0x00, 0x00}, 0x05},
{0xff, 0x0000, {0x00}, 0x00}, /* Terminating Entry */
};
static struct it913xset set_it9137_template[] = {
{PRO_DMOD, 0xee06, {0x00}, 0x01},
{PRO_DMOD, 0xec56, {0x00}, 0x01},
{PRO_DMOD, 0xec4c, {0x00, 0x00, 0x00, 0x00, 0x00}, 0x05},
{PRO_DMOD, 0xec4c, {0x00}, 0x01},
{PRO_DMOD, 0xec4d, {0x00}, 0x01},
{PRO_DMOD, 0xec4e, {0x00}, 0x01},
{PRO_DMOD, 0xec4f, {0x00}, 0x01},
{PRO_DMOD, 0xec50, {0x00}, 0x01},
{0xff, 0x0000, {0x00}, 0x00}, /* Terminating Entry */
};

139
drivers/media/dvb/frontends/it913x-fe.c
View File

@ -58,6 +58,10 @@ struct it913x_fe_state {
u8 tuner_type;
struct adctable *table;
fe_status_t it913x_status;
u16 tun_xtal;
u8 tun_fdiv;
u8 tun_clk_mode;
u32 tun_fn_min;
};
static int it913x_read_reg(struct it913x_fe_state *state,
@ -159,13 +163,74 @@ static int it913x_fe_script_loader(struct it913x_fe_state *state,
return 0;
}
static int it913x_init_tuner(struct it913x_fe_state *state)
{
int ret, i, reg;
u8 val, nv_val;
u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2};
u8 b[2];
reg = it913x_read_reg_u8(state, 0xec86);
switch (reg) {
case 0:
state->tun_clk_mode = reg;
state->tun_xtal = 2000;
state->tun_fdiv = 3;
val = 16;
break;
case -ENODEV:
return -ENODEV;
case 1:
default:
state->tun_clk_mode = reg;
state->tun_xtal = 640;
state->tun_fdiv = 1;
val = 6;
break;
}
reg = it913x_read_reg_u8(state, 0xed03);
if (reg < 0)
return -ENODEV;
else if (reg < sizeof(nv))
nv_val = nv[reg];
else
nv_val = 2;
for (i = 0; i < 50; i++) {
ret = it913x_read_reg(state, 0xed23, &b[0], sizeof(b));
reg = (b[1] << 8) + b[0];
if (reg > 0)
break;
if (ret < 0)
return -ENODEV;
udelay(2000);
}
state->tun_fn_min = state->tun_xtal * reg;
state->tun_fn_min /= (state->tun_fdiv * nv_val);
deb_info("Tuner fn_min %d", state->tun_fn_min);
for (i = 0; i < 50; i++) {
reg = it913x_read_reg_u8(state, 0xec82);
if (reg > 0)
break;
if (reg < 0)
return -ENODEV;
udelay(2000);
}
return it913x_write_reg(state, PRO_DMOD, 0xed81, val);
}
static int it9137_set_tuner(struct it913x_fe_state *state,
enum fe_bandwidth bandwidth, u32 frequency_m)
{
struct it913xset *set_tuner = set_it9137_template;
int ret;
int ret, reg;
u32 frequency = frequency_m / 1000;
u32 freq;
u32 freq, temp_f, tmp;
u16 iqik_m_cal;
u16 n_div;
u8 n;
u8 l_band;
@ -218,10 +283,11 @@ static int it9137_set_tuner(struct it913x_fe_state *state,
bw = 6;
else
bw = 6;
set_tuner[1].reg[0] = bw;
set_tuner[2].reg[0] = 0xa0 | (l_band << 3);
if (frequency > 49000 && frequency <= 74000) {
if (frequency > 53000 && frequency <= 74000) {
n_div = 48;
n = 0;
} else if (frequency > 74000 && frequency <= 111000) {
@ -239,10 +305,10 @@ static int it9137_set_tuner(struct it913x_fe_state *state,
} else if (frequency > 296000 && frequency <= 445000) {
n_div = 8;
n = 5;
} else if (frequency > 445000 && frequency <= 560000) {
} else if (frequency > 445000 && frequency <= state->tun_fn_min) {
n_div = 6;
n = 6;
} else if (frequency > 560000 && frequency <= 860000) {
} else if (frequency > state->tun_fn_min && frequency <= 950000) {
n_div = 4;
n = 7;
} else if (frequency > 1450000 && frequency <= 1680000) {
@ -251,26 +317,47 @@ static int it9137_set_tuner(struct it913x_fe_state *state,
} else
return -EINVAL;
reg = it913x_read_reg_u8(state, 0xed81);
iqik_m_cal = (u16)reg * n_div;
if (reg < 0x20) {
if (state->tun_clk_mode == 0)
iqik_m_cal = (iqik_m_cal * 9) >> 5;
else
iqik_m_cal >>= 1;
} else {
iqik_m_cal = 0x40 - iqik_m_cal;
if (state->tun_clk_mode == 0)
iqik_m_cal = ~((iqik_m_cal * 9) >> 5);
else
iqik_m_cal = ~(iqik_m_cal >> 1);
}
temp_f = frequency * (u32)n_div * (u32)state->tun_fdiv;
freq = temp_f / state->tun_xtal;
tmp = freq * state->tun_xtal;
if ((temp_f - tmp) >= (state->tun_xtal >> 1))
freq++;
/* Frequency + 3000 TODO not sure this is bandwidth setting */
/* Xtal frequency 21327? but it works */
freq = (u32) (n_div * 32 * (frequency + 3000) / 21327);
freq += (u32) n << 13;
set_tuner[2].reg[1] = freq & 0xff;
set_tuner[2].reg[2] = (freq >> 8) & 0xff;
/* Frequency OMEGA_IQIK_M_CAL_MID*/
temp_f = freq + (u32)iqik_m_cal;
/* frequency */
freq = (u32) (n_div * 32 * frequency / 21327);
freq += (u32) n << 13;
set_tuner[2].reg[3] = freq & 0xff;
set_tuner[2].reg[4] = (freq >> 8) & 0xff;
set_tuner[3].reg[0] = temp_f & 0xff;
set_tuner[4].reg[0] = (temp_f >> 8) & 0xff;
deb_info("Frequency = %08x, Bandwidth = %02x, ", freq, bw);
deb_info("High Frequency = %04x", temp_f);
/* Lower frequency */
set_tuner[5].reg[0] = freq & 0xff;
set_tuner[6].reg[0] = (freq >> 8) & 0xff;
deb_info("low Frequency = %04x", freq);
ret = it913x_fe_script_loader(state, set_tuner);
return (ret < 0) ? -ENODEV : 0;
}
static int it913x_fe_select_bw(struct it913x_fe_state *state,
@ -593,6 +680,8 @@ static int it913x_fe_start(struct it913x_fe_state *state)
u32 adc, xtal;
u8 b[4];
ret = it913x_init_tuner(state);
if (adf < 12) {
state->crystalFrequency = fe_clockTable[adf].xtal ;
state->table = fe_clockTable[adf].table;
@ -612,7 +701,6 @@ static int it913x_fe_start(struct it913x_fe_state *state)
ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_ON, 0x1);
ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x1);
ret |= it913x_write_reg(state, PRO_DMOD, 0xed81, 0x10);
ret |= it913x_write_reg(state, PRO_LINK, 0xf641, state->tuner_type);
ret |= it913x_write_reg(state, PRO_DMOD, 0xf5ca, 0x01);
ret |= it913x_write_reg(state, PRO_DMOD, 0xf715, 0x01);
@ -635,6 +723,7 @@ static int it913x_fe_start(struct it913x_fe_state *state)
default:
return -EINVAL;
}
/* set the demod */
ret = it913x_fe_script_loader(state, set_fe);
/* Always solo frontend */
@ -648,20 +737,8 @@ static int it913x_fe_start(struct it913x_fe_state *state)
static int it913x_fe_init(struct dvb_frontend *fe)
{
struct it913x_fe_state *state = fe->demodulator_priv;
struct it913xset *set_tuner;
int ret = 0;
switch (state->tuner_type) {
case IT9137: /* Tuner type 0x38 */
set_tuner = it9137_tuner;
break;
default:
return -EINVAL;
}
/* set any tuner reg(s) */
ret = it913x_fe_script_loader(state, set_tuner);
it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x0);
ret |= it913x_fe_script_loader(state, init_1);
@ -743,5 +820,5 @@ static struct dvb_frontend_ops it913x_fe_ofdm_ops = {
MODULE_DESCRIPTION("it913x Frontend and it9137 tuner");
MODULE_AUTHOR("Malcolm Priestley tvboxspy@gmail.com");
MODULE_VERSION("1.05");
MODULE_VERSION("1.06");
MODULE_LICENSE("GPL");