Correct tuner settings for more accuracy.
This now makes the tuner section more compatible with other
versions of the IT913X series.
TODO
Version 2 chip.
Signed-off-by: Malcolm Priestley <tvboxspy@xxxxxxxxx>
---
drivers/media/dvb/frontends/it913x-fe-priv.h | 24 +----
drivers/media/dvb/frontends/it913x-fe.c | 139 ++++++++++++++++++++------
2 files changed, 113 insertions(+), 50 deletions(-)
diff --git a/drivers/media/dvb/frontends/it913x-fe-priv.h b/drivers/media/dvb/frontends/it913x-fe-priv.h
index b80634ab..40e1d9b 100644
--- a/drivers/media/dvb/frontends/it913x-fe-priv.h
+++ b/drivers/media/dvb/frontends/it913x-fe-priv.h
@@ -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 */
};
diff --git a/drivers/media/dvb/frontends/it913x-fe.c b/drivers/media/dvb/frontends/it913x-fe.c
index c92b3ec..a6ae55c 100644
--- a/drivers/media/dvb/frontends/it913x-fe.c
+++ b/drivers/media/dvb/frontends/it913x-fe.c
@@ -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;
- /* 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;
+ 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 */
- 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;
+ /* Frequency OMEGA_IQIK_M_CAL_MID*/
+ temp_f = freq + (u32)iqik_m_cal;
- deb_info("Frequency = %08x, Bandwidth = %02x, ", freq, bw);
+ set_tuner[3].reg[0] = temp_f & 0xff;
+ set_tuner[4].reg[0] = (temp_f >> 8) & 0xff;
+
+ 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@xxxxxxxxx");
-MODULE_VERSION("1.05");
+MODULE_VERSION("1.06");
MODULE_LICENSE("GPL");
--
1.7.5.4
--
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