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media: si2157: Add analog tuning related functions
Include set_analog_params, get_frequency, and get_bandwidth. Tested with NTSC and PAL standards via ch3/4 generator. Other standards are included, but are untested due to lack of generator. Signed-off-by: Brad Love <brad@nextdimension.cc> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Brad Love
Mauro Carvalho Chehab
parent
e955f959ac
commit
7e80a8d14d
2 changed files with 230 additions and 3 deletions
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@ -371,7 +371,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
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if (ret)
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goto err;
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/* set if frequency if needed */
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/* set digital if frequency if needed */
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if (if_frequency != dev->if_frequency) {
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memcpy(cmd.args, "\x14\x00\x06\x07", 4);
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cmd.args[4] = (if_frequency / 1000) & 0xff;
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@ -385,7 +385,7 @@ static int si2157_set_params(struct dvb_frontend *fe)
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dev->if_frequency = if_frequency;
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}
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/* set frequency */
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/* set digital frequency */
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memcpy(cmd.args, "\x41\x00\x00\x00\x00\x00\x00\x00", 8);
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cmd.args[4] = (c->frequency >> 0) & 0xff;
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cmd.args[5] = (c->frequency >> 8) & 0xff;
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@ -397,18 +397,240 @@ static int si2157_set_params(struct dvb_frontend *fe)
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if (ret)
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goto err;
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dev->bandwidth = bandwidth;
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dev->frequency = c->frequency;
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return 0;
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err:
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dev->bandwidth = 0;
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dev->frequency = 0;
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dev->if_frequency = 0;
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_set_analog_params(struct dvb_frontend *fe,
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struct analog_parameters *params)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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char *std; /* for debugging */
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int ret;
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struct si2157_cmd cmd;
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u32 bandwidth = 0;
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u32 if_frequency = 0;
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u32 freq = 0;
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u64 tmp_lval = 0;
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u8 system = 0;
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u8 color = 0; /* 0=NTSC/PAL, 0x10=SECAM */
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u8 invert_analog = 1; /* analog tuner spectrum; 0=normal, 1=inverted */
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if (dev->chiptype != SI2157_CHIPTYPE_SI2157) {
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dev_info(&client->dev, "Analog tuning not supported for chiptype=%u\n",
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dev->chiptype);
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ret = -EINVAL;
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goto err;
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}
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if (!dev->active)
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si2157_init(fe);
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if (!dev->active) {
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ret = -EAGAIN;
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goto err;
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}
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if (params->mode == V4L2_TUNER_RADIO) {
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/*
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* std = "fm";
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* bandwidth = 1700000; //best can do for FM, AGC will be a mess though
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* if_frequency = 1250000; //HVR-225x(saa7164), HVR-12xx(cx23885)
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* if_frequency = 6600000; //HVR-9xx(cx231xx)
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* if_frequency = 5500000; //HVR-19xx(pvrusb2)
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*/
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dev_err(&client->dev, "si2157 does not currently support FM radio\n");
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ret = -EINVAL;
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goto err;
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}
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tmp_lval = params->frequency * 625LL;
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do_div(tmp_lval, 10); /* convert to HZ */
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freq = (u32)tmp_lval;
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if (freq < 1000000) /* is freq in KHz */
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freq = freq * 1000;
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dev->frequency = freq;
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/* if_frequency values based on tda187271C2 */
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if (params->std & (V4L2_STD_B | V4L2_STD_GH)) {
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if (freq >= 470000000) {
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std = "palGH";
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bandwidth = 8000000;
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if_frequency = 6000000;
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system = 1;
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if (params->std &
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(V4L2_STD_SECAM_G | V4L2_STD_SECAM_H)) {
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std = "secamGH";
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color = 0x10;
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}
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} else {
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std = "palB";
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bandwidth = 7000000;
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if_frequency = 6000000;
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system = 0;
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if (params->std & V4L2_STD_SECAM_B) {
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std = "secamB";
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color = 0x10;
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}
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}
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} else if (params->std & V4L2_STD_MN) {
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std = "MN";
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bandwidth = 6000000;
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if_frequency = 5400000;
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system = 2;
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} else if (params->std & V4L2_STD_PAL_I) {
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std = "palI";
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bandwidth = 8000000;
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if_frequency = 7250000; /* TODO: does not work yet */
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system = 4;
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} else if (params->std & V4L2_STD_DK) {
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std = "palDK";
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bandwidth = 8000000;
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if_frequency = 6900000; /* TODO: does not work yet */
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system = 5;
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if (params->std & V4L2_STD_SECAM_DK) {
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std = "secamDK";
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color = 0x10;
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}
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} else if (params->std & V4L2_STD_SECAM_L) {
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std = "secamL";
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bandwidth = 8000000;
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if_frequency = 6750000; /* TODO: untested */
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system = 6;
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color = 0x10;
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} else if (params->std & V4L2_STD_SECAM_LC) {
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std = "secamL'";
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bandwidth = 7000000;
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if_frequency = 1250000; /* TODO: untested */
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system = 7;
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color = 0x10;
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} else {
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std = "unknown";
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}
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/* calc channel center freq */
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freq = freq - 1250000 + (bandwidth / 2);
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dev_dbg(&client->dev,
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"mode=%d system=%u std='%s' params->frequency=%u center freq=%u if=%u bandwidth=%u\n",
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params->mode, system, std, params->frequency,
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freq, if_frequency, bandwidth);
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/* set analog IF port */
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memcpy(cmd.args, "\x14\x00\x03\x06\x08\x02", 6);
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/* in using dev->if_port, we assume analog and digital IF's */
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/* are always on different ports */
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/* assumes if_port definition is 0 or 1 for digital out */
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cmd.args[4] = (dev->if_port == 1) ? 8 : 10;
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/* Analog AGC assumed external */
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cmd.args[5] = (dev->if_port == 1) ? 2 : 1;
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* set analog IF output config */
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memcpy(cmd.args, "\x14\x00\x0d\x06\x94\x64", 6);
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* make this distinct from a digital IF */
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dev->if_frequency = if_frequency | 1;
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/* calc and set tuner analog if center frequency */
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if_frequency = if_frequency + 1250000 - (bandwidth / 2);
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dev_dbg(&client->dev, "IF Ctr freq=%d\n", if_frequency);
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memcpy(cmd.args, "\x14\x00\x0C\x06", 4);
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cmd.args[4] = (if_frequency / 1000) & 0xff;
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cmd.args[5] = ((if_frequency / 1000) >> 8) & 0xff;
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* set analog AGC config */
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memcpy(cmd.args, "\x14\x00\x07\x06\x32\xc8", 6);
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cmd.wlen = 6;
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cmd.rlen = 4;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* set analog video mode */
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memcpy(cmd.args, "\x14\x00\x04\x06\x00\x00", 6);
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cmd.args[4] = system | color;
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/* can use dev->inversion if assumed applies to both digital/analog */
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if (invert_analog)
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cmd.args[5] |= 0x02;
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cmd.wlen = 6;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/* set analog frequency */
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memcpy(cmd.args, "\x41\x01\x00\x00\x00\x00\x00\x00", 8);
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cmd.args[4] = (freq >> 0) & 0xff;
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cmd.args[5] = (freq >> 8) & 0xff;
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cmd.args[6] = (freq >> 16) & 0xff;
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cmd.args[7] = (freq >> 24) & 0xff;
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cmd.wlen = 8;
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cmd.rlen = 1;
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ret = si2157_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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dev->bandwidth = bandwidth;
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return 0;
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err:
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dev->bandwidth = 0;
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dev->frequency = 0;
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dev->if_frequency = 0;
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int si2157_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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*frequency = dev->frequency;
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dev_dbg(&client->dev, "freq=%u\n", dev->frequency);
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return 0;
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}
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static int si2157_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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*bandwidth = dev->bandwidth;
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dev_dbg(&client->dev, "bandwidth=%u\n", dev->bandwidth);
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return 0;
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}
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static int si2157_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct i2c_client *client = fe->tuner_priv;
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struct si2157_dev *dev = i2c_get_clientdata(client);
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*frequency = dev->if_frequency;
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*frequency = dev->if_frequency & ~1; /* strip analog IF indicator bit */
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dev_dbg(&client->dev, "if_frequency=%u\n", *frequency);
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return 0;
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}
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@ -422,6 +644,9 @@ static const struct dvb_tuner_ops si2157_ops = {
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.init = si2157_init,
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.sleep = si2157_sleep,
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.set_params = si2157_set_params,
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.set_analog_params = si2157_set_analog_params,
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.get_frequency = si2157_get_frequency,
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.get_bandwidth = si2157_get_bandwidth,
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.get_if_frequency = si2157_get_if_frequency,
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};
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@ -29,6 +29,8 @@ struct si2157_dev {
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u8 chiptype;
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u8 if_port;
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u32 if_frequency;
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u32 bandwidth;
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u32 frequency;
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struct delayed_work stat_work;
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#if defined(CONFIG_MEDIA_CONTROLLER)
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