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[media] si2168: implement ber statistics
Implement DVBv5 BER. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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parent
e5360224eb
commit
8393c00369
drivers/media/dvb-frontends
@ -85,7 +85,8 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
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struct i2c_client *client = fe->demodulator_priv;
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struct si2168_dev *dev = i2c_get_clientdata(client);
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret;
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int ret, i;
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unsigned int utmp, utmp1, utmp2;
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struct si2168_cmd cmd;
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*status = 0;
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@ -144,6 +145,39 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status)
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dev_dbg(&client->dev, "status=%02x args=%*ph\n",
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*status, cmd.rlen, cmd.args);
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/* BER */
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if (*status & FE_HAS_VITERBI) {
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memcpy(cmd.args, "\x82\x00", 2);
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cmd.wlen = 2;
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cmd.rlen = 3;
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ret = si2168_cmd_execute(client, &cmd);
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if (ret)
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goto err;
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/*
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* Firmware returns [0, 255] mantissa and [0, 8] exponent.
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* Convert to DVB API: mantissa * 10^(8 - exponent) / 10^8
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*/
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utmp = clamp(8 - cmd.args[1], 0, 8);
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for (i = 0, utmp1 = 1; i < utmp; i++)
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utmp1 = utmp1 * 10;
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utmp1 = cmd.args[2] * utmp1;
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utmp2 = 100000000; /* 10^8 */
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dev_dbg(&client->dev,
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"post_bit_error=%u post_bit_count=%u ber=%u*10^-%u\n",
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utmp1, utmp2, cmd.args[2], cmd.args[1]);
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c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
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c->post_bit_error.stat[0].uvalue += utmp1;
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c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
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c->post_bit_count.stat[0].uvalue += utmp2;
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} else {
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c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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}
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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@ -355,6 +389,7 @@ static int si2168_init(struct dvb_frontend *fe)
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{
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struct i2c_client *client = fe->demodulator_priv;
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struct si2168_dev *dev = i2c_get_clientdata(client);
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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int ret, len, remaining;
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const struct firmware *fw;
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struct si2168_cmd cmd;
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@ -493,10 +528,17 @@ static int si2168_init(struct dvb_frontend *fe)
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dev->warm = true;
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warm:
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/* Init stats here to indicate which stats are supported */
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c->cnr.len = 1;
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c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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c->post_bit_error.len = 1;
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c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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c->post_bit_count.len = 1;
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c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
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dev->active = true;
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return 0;
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err_release_firmware:
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release_firmware(fw);
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err:
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@ -21,6 +21,7 @@
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#include "dvb_frontend.h"
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#include <linux/firmware.h>
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#include <linux/i2c-mux.h>
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#include <linux/kernel.h>
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#define SI2168_A20_FIRMWARE "dvb-demod-si2168-a20-01.fw"
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#define SI2168_A30_FIRMWARE "dvb-demod-si2168-a30-01.fw"
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