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path: root/drivers/media/dvb/frontends/tda10048.c
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Diffstat (limited to 'drivers/media/dvb/frontends/tda10048.c')
-rw-r--r--drivers/media/dvb/frontends/tda10048.c312
1 files changed, 298 insertions, 14 deletions
diff --git a/drivers/media/dvb/frontends/tda10048.c b/drivers/media/dvb/frontends/tda10048.c
index 2a8bbcd44cd0..4302c563a6b8 100644
--- a/drivers/media/dvb/frontends/tda10048.c
+++ b/drivers/media/dvb/frontends/tda10048.c
@@ -1,7 +1,7 @@
/*
NXP TDA10048HN DVB OFDM demodulator driver
- Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
+ Copyright (C) 2009 Steven Toth <stoth@kernellabs.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -25,6 +25,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <asm/div64.h>
#include "dvb_frontend.h"
#include "dvb_math.h"
#include "tda10048.h"
@@ -138,11 +139,20 @@ struct tda10048_state {
struct i2c_adapter *i2c;
- /* configuration settings */
- const struct tda10048_config *config;
+ /* We'll cache and update the attach config settings */
+ struct tda10048_config config;
struct dvb_frontend frontend;
int fwloaded;
+
+ u32 freq_if_hz;
+ u32 xtal_hz;
+ u32 pll_mfactor;
+ u32 pll_nfactor;
+ u32 pll_pfactor;
+ u32 sample_freq;
+
+ enum fe_bandwidth bandwidth;
};
static struct init_tab {
@@ -192,12 +202,26 @@ static struct init_tab {
{ TDA10048_CONF_C4_2, 0x04 },
};
+static struct pll_tab {
+ u32 clk_freq_khz;
+ u32 if_freq_khz;
+ u8 m, n, p;
+} pll_tab[] = {
+ { TDA10048_CLK_4000, TDA10048_IF_36130, 10, 0, 0 },
+ { TDA10048_CLK_16000, TDA10048_IF_3300, 10, 3, 0 },
+ { TDA10048_CLK_16000, TDA10048_IF_3500, 10, 3, 0 },
+ { TDA10048_CLK_16000, TDA10048_IF_4000, 10, 3, 0 },
+ { TDA10048_CLK_16000, TDA10048_IF_4300, 10, 3, 0 },
+ { TDA10048_CLK_16000, TDA10048_IF_36130, 10, 3, 0 },
+};
+
static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
{
+ struct tda10048_config *config = &state->config;
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg = {
- .addr = state->config->demod_address,
+ .addr = config->demod_address,
.flags = 0, .buf = buf, .len = 2 };
dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
@@ -212,13 +236,14 @@ static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
{
+ struct tda10048_config *config = &state->config;
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
- { .addr = state->config->demod_address,
+ { .addr = config->demod_address,
.flags = 0, .buf = b0, .len = 1 },
- { .addr = state->config->demod_address,
+ { .addr = config->demod_address,
.flags = I2C_M_RD, .buf = b1, .len = 1 } };
dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
@@ -235,6 +260,7 @@ static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
const u8 *data, u16 len)
{
+ struct tda10048_config *config = &state->config;
int ret = -EREMOTEIO;
struct i2c_msg msg;
u8 *buf;
@@ -250,7 +276,7 @@ static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
*buf = reg;
memcpy(buf + 1, data, len);
- msg.addr = state->config->demod_address;
+ msg.addr = config->demod_address;
msg.flags = 0;
msg.buf = buf;
msg.len = len + 1;
@@ -271,14 +297,206 @@ error:
return ret;
}
+static int tda10048_set_phy2(struct dvb_frontend *fe, u32 sample_freq_hz,
+ u32 if_hz)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ u64 t;
+
+ dprintk(1, "%s()\n", __func__);
+
+ if (sample_freq_hz == 0)
+ return -EINVAL;
+
+ if (if_hz < (sample_freq_hz / 2)) {
+ /* PHY2 = (if2/fs) * 2^15 */
+ t = if_hz;
+ t *= 10;
+ t *= 32768;
+ do_div(t, sample_freq_hz);
+ t += 5;
+ do_div(t, 10);
+ } else {
+ /* PHY2 = ((IF1-fs)/fs) * 2^15 */
+ t = sample_freq_hz - if_hz;
+ t *= 10;
+ t *= 32768;
+ do_div(t, sample_freq_hz);
+ t += 5;
+ do_div(t, 10);
+ t = ~t + 1;
+ }
+
+ tda10048_writereg(state, TDA10048_FREQ_PHY2_LSB, (u8)t);
+ tda10048_writereg(state, TDA10048_FREQ_PHY2_MSB, (u8)(t >> 8));
+
+ return 0;
+}
+
+static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
+ u32 bw)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ u64 t, z;
+ u32 b = 8000000;
+
+ dprintk(1, "%s()\n", __func__);
+
+ if (sample_freq_hz == 0)
+ return -EINVAL;
+
+ if (bw == BANDWIDTH_6_MHZ)
+ b = 6000000;
+ else
+ if (bw == BANDWIDTH_7_MHZ)
+ b = 7000000;
+
+ /* WREF = (B / (7 * fs)) * 2^31 */
+ t = b * 10;
+ /* avoid warning: this decimal constant is unsigned only in ISO C90 */
+ /* t *= 2147483648 on 32bit platforms */
+ t *= (2048 * 1024);
+ t *= 1024;
+ z = 7 * sample_freq_hz;
+ do_div(t, z);
+ t += 5;
+ do_div(t, 10);
+
+ tda10048_writereg(state, TDA10048_TIME_WREF_LSB, (u8)t);
+ tda10048_writereg(state, TDA10048_TIME_WREF_MID1, (u8)(t >> 8));
+ tda10048_writereg(state, TDA10048_TIME_WREF_MID2, (u8)(t >> 16));
+ tda10048_writereg(state, TDA10048_TIME_WREF_MSB, (u8)(t >> 24));
+
+ return 0;
+}
+
+static int tda10048_set_invwref(struct dvb_frontend *fe, u32 sample_freq_hz,
+ u32 bw)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ u64 t;
+ u32 b = 8000000;
+
+ dprintk(1, "%s()\n", __func__);
+
+ if (sample_freq_hz == 0)
+ return -EINVAL;
+
+ if (bw == BANDWIDTH_6_MHZ)
+ b = 6000000;
+ else
+ if (bw == BANDWIDTH_7_MHZ)
+ b = 7000000;
+
+ /* INVWREF = ((7 * fs) / B) * 2^5 */
+ t = sample_freq_hz;
+ t *= 7;
+ t *= 32;
+ t *= 10;
+ do_div(t, b);
+ t += 5;
+ do_div(t, 10);
+
+ tda10048_writereg(state, TDA10048_TIME_INVWREF_LSB, (u8)t);
+ tda10048_writereg(state, TDA10048_TIME_INVWREF_MSB, (u8)(t >> 8));
+
+ return 0;
+}
+
+static int tda10048_set_bandwidth(struct dvb_frontend *fe,
+ enum fe_bandwidth bw)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ dprintk(1, "%s(bw=%d)\n", __func__, bw);
+
+ /* Bandwidth setting may need to be adjusted */
+ switch (bw) {
+ case BANDWIDTH_6_MHZ:
+ case BANDWIDTH_7_MHZ:
+ case BANDWIDTH_8_MHZ:
+ tda10048_set_wref(fe, state->sample_freq, bw);
+ tda10048_set_invwref(fe, state->sample_freq, bw);
+ break;
+ default:
+ printk(KERN_ERR "%s() invalid bandwidth\n", __func__);
+ return -EINVAL;
+ }
+
+ state->bandwidth = bw;
+
+ return 0;
+}
+
+static int tda10048_set_if(struct dvb_frontend *fe, enum fe_bandwidth bw)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ struct tda10048_config *config = &state->config;
+ int i;
+ u32 if_freq_khz;
+
+ dprintk(1, "%s(bw = %d)\n", __func__, bw);
+
+ /* based on target bandwidth and clk we calculate pll factors */
+ switch (bw) {
+ case BANDWIDTH_6_MHZ:
+ if_freq_khz = config->dtv6_if_freq_khz;
+ break;
+ case BANDWIDTH_7_MHZ:
+ if_freq_khz = config->dtv7_if_freq_khz;
+ break;
+ case BANDWIDTH_8_MHZ:
+ if_freq_khz = config->dtv8_if_freq_khz;
+ break;
+ default:
+ printk(KERN_ERR "%s() no default\n", __func__);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pll_tab); i++) {
+ if ((pll_tab[i].clk_freq_khz == config->clk_freq_khz) &&
+ (pll_tab[i].if_freq_khz == if_freq_khz)) {
+
+ state->freq_if_hz = pll_tab[i].if_freq_khz * 1000;
+ state->xtal_hz = pll_tab[i].clk_freq_khz * 1000;
+ state->pll_mfactor = pll_tab[i].m;
+ state->pll_nfactor = pll_tab[i].n;
+ state->pll_pfactor = pll_tab[i].p;
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(pll_tab)) {
+ printk(KERN_ERR "%s() Incorrect attach settings\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
+ dprintk(1, "- xtal_hz = %d\n", state->xtal_hz);
+ dprintk(1, "- pll_mfactor = %d\n", state->pll_mfactor);
+ dprintk(1, "- pll_nfactor = %d\n", state->pll_nfactor);
+ dprintk(1, "- pll_pfactor = %d\n", state->pll_pfactor);
+
+ /* Calculate the sample frequency */
+ state->sample_freq = state->xtal_hz * (state->pll_mfactor + 45);
+ state->sample_freq /= (state->pll_nfactor + 1);
+ state->sample_freq /= (state->pll_pfactor + 4);
+ dprintk(1, "- sample_freq = %d\n", state->sample_freq);
+
+ /* Update the I/F */
+ tda10048_set_phy2(fe, state->sample_freq, state->freq_if_hz);
+
+ return 0;
+}
+
static int tda10048_firmware_upload(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
+ struct tda10048_config *config = &state->config;
const struct firmware *fw;
int ret;
int pos = 0;
int cnt;
- u8 wlen = state->config->fwbulkwritelen;
+ u8 wlen = config->fwbulkwritelen;
if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
wlen = TDA10048_BULKWRITE_200;
@@ -289,7 +507,7 @@ static int tda10048_firmware_upload(struct dvb_frontend *fe)
TDA10048_DEFAULT_FIRMWARE);
ret = request_firmware(&fw, TDA10048_DEFAULT_FIRMWARE,
- &state->i2c->dev);
+ state->i2c->dev.parent);
if (ret) {
printk(KERN_ERR "%s: Upload failed. (file not found?)\n",
__func__);
@@ -484,8 +702,12 @@ static int tda10048_get_tps(struct tda10048_state *state,
static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct tda10048_state *state = fe->demodulator_priv;
+ struct tda10048_config *config = &state->config;
dprintk(1, "%s(%d)\n", __func__, enable);
+ if (config->disable_gate_access)
+ return 0;
+
if (enable)
return tda10048_writereg(state, TDA10048_CONF_C4_1,
tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x02);
@@ -523,6 +745,12 @@ static int tda10048_set_frontend(struct dvb_frontend *fe,
dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
+ /* Update the I/F pll's if the bandwidth changes */
+ if (p->u.ofdm.bandwidth != state->bandwidth) {
+ tda10048_set_if(fe, p->u.ofdm.bandwidth);
+ tda10048_set_bandwidth(fe, p->u.ofdm.bandwidth);
+ }
+
if (fe->ops.tuner_ops.set_params) {
if (fe->ops.i2c_gate_ctrl)
@@ -544,6 +772,7 @@ static int tda10048_set_frontend(struct dvb_frontend *fe,
static int tda10048_init(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
+ struct tda10048_config *config = &state->config;
int ret = 0, i;
dprintk(1, "%s()\n", __func__);
@@ -556,10 +785,14 @@ static int tda10048_init(struct dvb_frontend *fe)
ret = tda10048_firmware_upload(fe);
/* Set either serial or parallel */
- tda10048_output_mode(fe, state->config->output_mode);
+ tda10048_output_mode(fe, config->output_mode);
+
+ /* Set inversion */
+ tda10048_set_inversion(fe, config->inversion);
- /* set inversion */
- tda10048_set_inversion(fe, state->config->inversion);
+ /* Establish default RF values */
+ tda10048_set_if(fe, BANDWIDTH_8_MHZ);
+ tda10048_set_bandwidth(fe, BANDWIDTH_8_MHZ);
/* Ensure we leave the gate closed */
tda10048_i2c_gate_ctrl(fe, 0);
@@ -812,6 +1045,45 @@ static void tda10048_release(struct dvb_frontend *fe)
kfree(state);
}
+static void tda10048_establish_defaults(struct dvb_frontend *fe)
+{
+ struct tda10048_state *state = fe->demodulator_priv;
+ struct tda10048_config *config = &state->config;
+
+ /* Validate/default the config */
+ if (config->dtv6_if_freq_khz == 0) {
+ config->dtv6_if_freq_khz = TDA10048_IF_4300;
+ printk(KERN_WARNING "%s() tda10048_config.dtv6_if_freq_khz "
+ "is not set (defaulting to %d)\n",
+ __func__,
+ config->dtv6_if_freq_khz);
+ }
+
+ if (config->dtv7_if_freq_khz == 0) {
+ config->dtv7_if_freq_khz = TDA10048_IF_4300;
+ printk(KERN_WARNING "%s() tda10048_config.dtv7_if_freq_khz "
+ "is not set (defaulting to %d)\n",
+ __func__,
+ config->dtv7_if_freq_khz);
+ }
+
+ if (config->dtv8_if_freq_khz == 0) {
+ config->dtv8_if_freq_khz = TDA10048_IF_4300;
+ printk(KERN_WARNING "%s() tda10048_config.dtv8_if_freq_khz "
+ "is not set (defaulting to %d)\n",
+ __func__,
+ config->dtv8_if_freq_khz);
+ }
+
+ if (config->clk_freq_khz == 0) {
+ config->clk_freq_khz = TDA10048_CLK_16000;
+ printk(KERN_WARNING "%s() tda10048_config.clk_freq_khz "
+ "is not set (defaulting to %d)\n",
+ __func__,
+ config->clk_freq_khz);
+ }
+}
+
static struct dvb_frontend_ops tda10048_ops;
struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
@@ -826,10 +1098,11 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
if (state == NULL)
goto error;
- /* setup the state */
- state->config = config;
+ /* setup the state and clone the config */
+ memcpy(&state->config, config, sizeof(*config));
state->i2c = i2c;
state->fwloaded = 0;
+ state->bandwidth = BANDWIDTH_8_MHZ;
/* check if the demod is present */
if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
@@ -840,6 +1113,17 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
+ /* Establish any defaults the the user didn't pass */
+ tda10048_establish_defaults(&state->frontend);
+
+ /* Set the xtal and freq defaults */
+ if (tda10048_set_if(&state->frontend, BANDWIDTH_8_MHZ) != 0)
+ goto error;
+
+ /* Default bandwidth */
+ if (tda10048_set_bandwidth(&state->frontend, BANDWIDTH_8_MHZ) != 0)
+ goto error;
+
/* Leave the gate closed */
tda10048_i2c_gate_ctrl(&state->frontend, 0);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 23:37:51 +0100