From 68d5ce70217ddd20baf3583ce25f08e869eb148f Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 8 Feb 2009 08:34:43 -0300 Subject: 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/tuners/tda827x.c | 183 +++++++++++++++++++--------------- 1 file changed, 102 insertions(+), 81 deletions(-) (limited to 'drivers/media/common') diff --git a/drivers/media/common/tuners/tda827x.c b/drivers/media/common/tuners/tda827x.c index f4d931f14fa..8cd55a83b38 100644 --- a/drivers/media/common/tuners/tda827x.c +++ b/drivers/media/common/tuners/tda827x.c @@ -132,11 +132,31 @@ static const struct tda827x_data tda827x_table[] = { { .lomax = 0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0} }; +static int tuner_transfer(struct dvb_frontend *fe, + struct i2c_msg *msg, + const int size) +{ + int rc; + struct tda827x_priv *priv = fe->tuner_priv; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + rc = i2c_transfer(priv->i2c_adap, msg, size); + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + + if (rc >= 0 && rc != size) + return -EIO; + + return rc; +} + static int tda827xo_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) { struct tda827x_priv *priv = fe->tuner_priv; u8 buf[14]; + int rc; struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0, .buf = buf, .len = sizeof(buf) }; @@ -183,27 +203,29 @@ static int tda827xo_set_params(struct dvb_frontend *fe, buf[13] = 0x40; msg.len = 14; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) { - printk("%s: could not write to tuner at addr: 0x%02x\n", - __func__, priv->i2c_addr << 1); - return -EIO; - } + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; + msleep(500); /* correct CP value */ buf[0] = 0x30; buf[1] = 0x50 + tda827x_table[i].cp; msg.len = 2; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; priv->frequency = params->frequency; priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0; return 0; + +err: + printk(KERN_ERR "%s: could not write to tuner at addr: 0x%02x\n", + __func__, priv->i2c_addr << 1); + return rc; } static int tda827xo_sleep(struct dvb_frontend *fe) @@ -214,9 +236,7 @@ static int tda827xo_sleep(struct dvb_frontend *fe) .buf = buf, .len = sizeof(buf) }; dprintk("%s:\n", __func__); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); if (priv->cfg && priv->cfg->sleep) priv->cfg->sleep(fe); @@ -266,44 +286,44 @@ static int tda827xo_set_analog_params(struct dvb_frontend *fe, msg.buf = tuner_reg; msg.len = 8; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msg.buf = reg2; msg.len = 2; reg2[0] = 0x80; reg2[1] = 0; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); reg2[0] = 0x60; reg2[1] = 0xbf; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); reg2[0] = 0x30; reg2[1] = tuner_reg[4] + 0x80; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msleep(1); reg2[0] = 0x30; reg2[1] = tuner_reg[4] + 4; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msleep(1); reg2[0] = 0x30; reg2[1] = tuner_reg[4]; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msleep(550); reg2[0] = 0x30; reg2[1] = (tuner_reg[4] & 0xfc) + tda827x_table[i].cp; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); reg2[0] = 0x60; reg2[1] = 0x3f; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); reg2[0] = 0x80; reg2[1] = 0x08; /* Vsync en */ - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); priv->frequency = params->frequency; @@ -317,7 +337,7 @@ static void tda827xo_agcf(struct dvb_frontend *fe) struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0, .buf = data, .len = 2}; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); } /* ------------------------------------------------------------------ */ @@ -398,13 +418,8 @@ static int tda827xa_sleep(struct dvb_frontend *fe) .buf = buf, .len = sizeof(buf) }; dprintk("%s:\n", __func__); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); - - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); + tuner_transfer(fe, &msg, 1); if (priv->cfg && priv->cfg->sleep) priv->cfg->sleep(fe); @@ -455,7 +470,7 @@ static void tda827xa_lna_gain(struct dvb_frontend *fe, int high, buf[1] = high ? 0 : 1; if (priv->cfg->config == 2) buf[1] = high ? 1 : 0; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); break; case 3: /* switch with GPIO of saa713x */ if (fe->callback) @@ -474,7 +489,7 @@ static int tda827xa_set_params(struct dvb_frontend *fe, struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0, .buf = buf, .len = sizeof(buf) }; - int i, tuner_freq, if_freq; + int i, tuner_freq, if_freq, rc; u32 N; dprintk("%s:\n", __func__); @@ -516,35 +531,32 @@ static int tda827xa_set_params(struct dvb_frontend *fe, buf[9] = 0x24; buf[10] = 0x00; msg.len = 11; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) { - printk("%s: could not write to tuner at addr: 0x%02x\n", - __func__, priv->i2c_addr << 1); - return -EIO; - } + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; + buf[0] = 0x90; buf[1] = 0xff; buf[2] = 0x60; buf[3] = 0x00; buf[4] = 0x59; // lpsel, for 6MHz + 2 msg.len = 5; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; buf[0] = 0xa0; buf[1] = 0x40; msg.len = 2; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; msleep(11); msg.flags = I2C_M_RD; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; msg.flags = 0; buf[1] >>= 4; @@ -553,49 +565,55 @@ static int tda827xa_set_params(struct dvb_frontend *fe, tda827xa_lna_gain(fe, 0, NULL); buf[0] = 0x60; buf[1] = 0x0c; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; } buf[0] = 0xc0; buf[1] = 0x99; // lpsel, for 6MHz + 2 - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; buf[0] = 0x60; buf[1] = 0x3c; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; /* correct CP value */ buf[0] = 0x30; buf[1] = 0x10 + tda827xa_dvbt[i].scr; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; msleep(163); buf[0] = 0xc0; buf[1] = 0x39; // lpsel, for 6MHz + 2 - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; msleep(3); /* freeze AGC1 */ buf[0] = 0x50; buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + rc = tuner_transfer(fe, &msg, 1); + if (rc < 0) + goto err; priv->frequency = params->frequency; priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0; + return 0; + +err: + printk(KERN_ERR "%s: could not write to tuner at addr: 0x%02x\n", + __func__, priv->i2c_addr << 1); + return rc; } @@ -643,7 +661,7 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe, tuner_reg[9] = 0x20; tuner_reg[10] = 0x00; msg.len = 11; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0x90; tuner_reg[1] = 0xff; @@ -651,19 +669,19 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe, tuner_reg[3] = 0; tuner_reg[4] = 0x99 + (priv->lpsel << 1); msg.len = 5; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0xa0; tuner_reg[1] = 0xc0; msg.len = 2; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0x30; tuner_reg[1] = 0x10 + tda827xa_analog[i].scr; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msg.flags = I2C_M_RD; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msg.flags = 0; tuner_reg[1] >>= 4; dprintk("AGC2 gain is: %d\n", tuner_reg[1]); @@ -673,24 +691,24 @@ static int tda827xa_set_analog_params(struct dvb_frontend *fe, msleep(100); tuner_reg[0] = 0x60; tuner_reg[1] = 0x3c; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); msleep(163); tuner_reg[0] = 0x50; tuner_reg[1] = 0x8f + (tda827xa_analog[i].gc3 << 4); - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0x80; tuner_reg[1] = 0x28; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0xb0; tuner_reg[1] = 0x01; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); tuner_reg[0] = 0xc0; tuner_reg[1] = 0x19 + (priv->lpsel << 1); - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); priv->frequency = params->frequency; @@ -703,7 +721,7 @@ static void tda827xa_agcf(struct dvb_frontend *fe) unsigned char data[] = {0x80, 0x2c}; struct i2c_msg msg = {.addr = priv->i2c_addr, .flags = 0, .buf = data, .len = 2}; - i2c_transfer(priv->i2c_adap, &msg, 1); + tuner_transfer(fe, &msg, 1); } /* ------------------------------------------------------------------ */ @@ -792,16 +810,19 @@ static struct dvb_tuner_ops tda827xa_tuner_ops = { }; static int tda827x_probe_version(struct dvb_frontend *fe) -{ u8 data; +{ + u8 data; + int rc; struct tda827x_priv *priv = fe->tuner_priv; struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD, .buf = &data, .len = 1 }; - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 1); - if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) { + + rc = tuner_transfer(fe, &msg, 1); + + if (rc < 0) { printk("%s: could not read from tuner at addr: 0x%02x\n", __func__, msg.addr << 1); - return -EIO; + return rc; } if ((data & 0x3c) == 0) { dprintk("tda827x tuner found\n"); -- cgit v1.2.3-70-g09d2