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| author |  Antti Palosaari <crope@iki.fi>
| 2016-02-08 09:51:16 -0200 |
|---|---|---|
| committer |  Mauro Carvalho Chehab <mchehab@osg.samsung.com>
| 2016-05-06 10:07:45 -0300 |
| commit | 78bab93026ab95b6c8b9e8770ef7089f7d40b2d5 (patch) | |
| tree | 1e75706110ef01fe835ad4990c1a0775c6cc13b7 /drivers/media/tuners/si2157.c | |
| parent | [media] zl10353: use div_u64 instead of do_div (diff) | |
| download | linux-78bab93026ab95b6c8b9e8770ef7089f7d40b2d5.tar.gz linux-78bab93026ab95b6c8b9e8770ef7089f7d40b2d5.tar.bz2 linux-78bab93026ab95b6c8b9e8770ef7089f7d40b2d5.zip | |
[media] si2157: detect if firmware is running
Detect if firmware is running run-time and download / start it only
when needed. Detection is done by reading IF frequency value.
Garbage value is returned by firmware when it is not running,
otherwise correct value is returned.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/tuners/si2157.c')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c index 243ac3816028..b07a681f3fbc 100644 --- a/drivers/media/tuners/si2157.c +++ b/drivers/media/tuners/si2157.c @@ -84,11 +84,22 @@ static int si2157_init(struct dvb_frontend *fe) struct si2157_cmd cmd; const struct firmware *fw; const char *fw_name; - unsigned int chip_id; + unsigned int uitmp, chip_id; dev_dbg(&client->dev, "\n"); - if (dev->fw_loaded) + /* Returned IF frequency is garbage when firmware is not running */ + memcpy(cmd.args, "\x15\x00\x06\x07", 4); + cmd.wlen = 4; + cmd.rlen = 4; + ret = si2157_cmd_execute(client, &cmd); + if (ret) + goto err; + + uitmp = cmd.args[2] << 0 | cmd.args[3] << 8; + dev_dbg(&client->dev, "if_frequency kHz=%u\n", uitmp); + + if (uitmp == dev->if_frequency / 1000) goto warm; /* power up */ @@ -203,9 +214,6 @@ skip_fw_download: dev_info(&client->dev, "firmware version: %c.%c.%d\n", cmd.args[6], cmd.args[7], cmd.args[8]); - - dev->fw_loaded = true; - warm: /* init statistics in order signal app which are supported */ c->strength.len = 1; @@ -422,7 +430,6 @@ static int si2157_probe(struct i2c_client *client, dev->fe = cfg->fe; dev->inversion = cfg->inversion; dev->if_port = cfg->if_port; - dev->fw_loaded = false; dev->chiptype = (u8)id->driver_data; dev->if_frequency = 5000000; /* default value of property 0x0706 */ mutex_init(&dev->i2c_mutex); |