mirror of https://gitee.com/openkylin/linux.git
V4L/DVB (10504): tda827x: Be sure that gate will be open/closed at the proper time
The gate control logic is broken: several routines just keep it open; other rotines close it properly; there are even other routines that assumes that it is open without really checking or opening it. Instead of having to manually handle the gate control and having such troubles, let a sub-routine take care of the gate, opening it before i2c_transfer and closing it after that. This avoids leaving the gate into a random state. Cc: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
230b65f994
commit
68d5ce7021
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@ -132,11 +132,31 @@ static const struct tda827x_data tda827x_table[] = {
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{ .lomax = 0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
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};
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static int tuner_transfer(struct dvb_frontend *fe,
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struct i2c_msg *msg,
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const int size)
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{
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int rc;
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struct tda827x_priv *priv = fe->tuner_priv;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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rc = i2c_transfer(priv->i2c_adap, msg, size);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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if (rc >= 0 && rc != size)
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return -EIO;
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return rc;
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}
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static int tda827xo_set_params(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params)
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{
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struct tda827x_priv *priv = fe->tuner_priv;
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u8 buf[14];
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int rc;
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struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
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.buf = buf, .len = sizeof(buf) };
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@ -183,27 +203,29 @@ static int tda827xo_set_params(struct dvb_frontend *fe,
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buf[13] = 0x40;
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msg.len = 14;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
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printk("%s: could not write to tuner at addr: 0x%02x\n",
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__func__, priv->i2c_addr << 1);
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return -EIO;
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}
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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msleep(500);
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/* correct CP value */
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buf[0] = 0x30;
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buf[1] = 0x50 + tda827x_table[i].cp;
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msg.len = 2;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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priv->frequency = params->frequency;
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priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
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return 0;
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err:
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printk(KERN_ERR "%s: could not write to tuner at addr: 0x%02x\n",
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__func__, priv->i2c_addr << 1);
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return rc;
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}
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static int tda827xo_sleep(struct dvb_frontend *fe)
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@ -214,9 +236,7 @@ static int tda827xo_sleep(struct dvb_frontend *fe)
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.buf = buf, .len = sizeof(buf) };
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dprintk("%s:\n", __func__);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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if (priv->cfg && priv->cfg->sleep)
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priv->cfg->sleep(fe);
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@ -266,44 +286,44 @@ static int tda827xo_set_analog_params(struct dvb_frontend *fe,
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msg.buf = tuner_reg;
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msg.len = 8;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msg.buf = reg2;
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msg.len = 2;
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reg2[0] = 0x80;
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reg2[1] = 0;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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reg2[0] = 0x60;
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reg2[1] = 0xbf;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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reg2[0] = 0x30;
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reg2[1] = tuner_reg[4] + 0x80;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msleep(1);
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reg2[0] = 0x30;
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reg2[1] = tuner_reg[4] + 4;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msleep(1);
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reg2[0] = 0x30;
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reg2[1] = tuner_reg[4];
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msleep(550);
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reg2[0] = 0x30;
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reg2[1] = (tuner_reg[4] & 0xfc) + tda827x_table[i].cp;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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reg2[0] = 0x60;
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reg2[1] = 0x3f;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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reg2[0] = 0x80;
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reg2[1] = 0x08; /* Vsync en */
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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priv->frequency = params->frequency;
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@ -317,7 +337,7 @@ static void tda827xo_agcf(struct dvb_frontend *fe)
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struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
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.buf = data, .len = 2};
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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}
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/* ------------------------------------------------------------------ */
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@ -398,13 +418,8 @@ static int tda827xa_sleep(struct dvb_frontend *fe)
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.buf = buf, .len = sizeof(buf) };
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dprintk("%s:\n", __func__);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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tuner_transfer(fe, &msg, 1);
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if (priv->cfg && priv->cfg->sleep)
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priv->cfg->sleep(fe);
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@ -455,7 +470,7 @@ static void tda827xa_lna_gain(struct dvb_frontend *fe, int high,
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buf[1] = high ? 0 : 1;
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if (priv->cfg->config == 2)
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buf[1] = high ? 1 : 0;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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break;
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case 3: /* switch with GPIO of saa713x */
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if (fe->callback)
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@ -474,7 +489,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
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struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
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.buf = buf, .len = sizeof(buf) };
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int i, tuner_freq, if_freq;
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int i, tuner_freq, if_freq, rc;
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u32 N;
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dprintk("%s:\n", __func__);
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@ -516,35 +531,32 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
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buf[9] = 0x24;
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buf[10] = 0x00;
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msg.len = 11;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
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printk("%s: could not write to tuner at addr: 0x%02x\n",
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__func__, priv->i2c_addr << 1);
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return -EIO;
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}
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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buf[0] = 0x90;
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buf[1] = 0xff;
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buf[2] = 0x60;
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buf[3] = 0x00;
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buf[4] = 0x59; // lpsel, for 6MHz + 2
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msg.len = 5;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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buf[0] = 0xa0;
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buf[1] = 0x40;
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msg.len = 2;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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msleep(11);
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msg.flags = I2C_M_RD;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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msg.flags = 0;
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buf[1] >>= 4;
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@ -553,49 +565,55 @@ static int tda827xa_set_params(struct dvb_frontend *fe,
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tda827xa_lna_gain(fe, 0, NULL);
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buf[0] = 0x60;
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buf[1] = 0x0c;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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}
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buf[0] = 0xc0;
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buf[1] = 0x99; // lpsel, for 6MHz + 2
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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buf[0] = 0x60;
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buf[1] = 0x3c;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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/* correct CP value */
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buf[0] = 0x30;
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buf[1] = 0x10 + tda827xa_dvbt[i].scr;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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msleep(163);
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buf[0] = 0xc0;
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buf[1] = 0x39; // lpsel, for 6MHz + 2
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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msleep(3);
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/* freeze AGC1 */
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buf[0] = 0x50;
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buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0)
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goto err;
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priv->frequency = params->frequency;
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priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
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return 0;
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err:
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printk(KERN_ERR "%s: could not write to tuner at addr: 0x%02x\n",
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__func__, priv->i2c_addr << 1);
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return rc;
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}
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@ -643,7 +661,7 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe,
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tuner_reg[9] = 0x20;
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tuner_reg[10] = 0x00;
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msg.len = 11;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0x90;
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tuner_reg[1] = 0xff;
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@ -651,19 +669,19 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe,
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tuner_reg[3] = 0;
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tuner_reg[4] = 0x99 + (priv->lpsel << 1);
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msg.len = 5;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0xa0;
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tuner_reg[1] = 0xc0;
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msg.len = 2;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0x30;
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tuner_reg[1] = 0x10 + tda827xa_analog[i].scr;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msg.flags = I2C_M_RD;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msg.flags = 0;
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tuner_reg[1] >>= 4;
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dprintk("AGC2 gain is: %d\n", tuner_reg[1]);
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@ -673,24 +691,24 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe,
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msleep(100);
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tuner_reg[0] = 0x60;
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tuner_reg[1] = 0x3c;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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msleep(163);
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tuner_reg[0] = 0x50;
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tuner_reg[1] = 0x8f + (tda827xa_analog[i].gc3 << 4);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0x80;
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tuner_reg[1] = 0x28;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0xb0;
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tuner_reg[1] = 0x01;
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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tuner_reg[0] = 0xc0;
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tuner_reg[1] = 0x19 + (priv->lpsel << 1);
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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priv->frequency = params->frequency;
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@ -703,7 +721,7 @@ static void tda827xa_agcf(struct dvb_frontend *fe)
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unsigned char data[] = {0x80, 0x2c};
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struct i2c_msg msg = {.addr = priv->i2c_addr, .flags = 0,
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.buf = data, .len = 2};
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i2c_transfer(priv->i2c_adap, &msg, 1);
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tuner_transfer(fe, &msg, 1);
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}
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/* ------------------------------------------------------------------ */
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@ -792,16 +810,19 @@ static struct dvb_tuner_ops tda827xa_tuner_ops = {
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};
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static int tda827x_probe_version(struct dvb_frontend *fe)
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{ u8 data;
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{
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u8 data;
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int rc;
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struct tda827x_priv *priv = fe->tuner_priv;
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struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
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.buf = &data, .len = 1 };
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
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rc = tuner_transfer(fe, &msg, 1);
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if (rc < 0) {
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printk("%s: could not read from tuner at addr: 0x%02x\n",
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__func__, msg.addr << 1);
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return -EIO;
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return rc;
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}
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if ((data & 0x3c) == 0) {
|
||||
dprintk("tda827x tuner found\n");
|
||||
|
|
|
|||
Loading…
Reference in New Issue