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authorAntti Palosaari <crope@iki.fi>2015-04-14 12:56:24 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-30 12:06:48 -0300
commitbefa0cc1da62d5e27b9001900c397c0dada9b032 (patch)
tree51b1c7ac9b0ae723be603bfd0e4786a2e8fa6beb /drivers/media/dvb-frontends/m88ds3103.c
parentce80d713e380581071e4050410fe71a4c926884d (diff)
[media] m88ds3103: use jiffies when polling DiSEqC TX ready
Use jiffies to set timeout for DiSEqC TX ready polling. Using jiffies is more elegant solution than looping N times with sleep. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/dvb-frontends/m88ds3103.c')
-rw-r--r--drivers/media/dvb-frontends/m88ds3103.c53
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c
index 33d8c190661e..e45641f2c794 100644
--- a/drivers/media/dvb-frontends/m88ds3103.c
+++ b/drivers/media/dvb-frontends/m88ds3103.c
@@ -1195,7 +1195,8 @@ static int m88ds3103_diseqc_send_master_cmd(struct dvb_frontend *fe,
struct dvb_diseqc_master_cmd *diseqc_cmd)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
- int ret, i;
+ int ret;
+ unsigned long timeout;
u8 u8tmp;
dev_dbg(&priv->i2c->dev, "%s: msg=%*ph\n", __func__,
@@ -1226,21 +1227,24 @@ static int m88ds3103_diseqc_send_master_cmd(struct dvb_frontend *fe,
if (ret)
goto err;
- /* DiSEqC message typical period is 54 ms */
- usleep_range(40000, 60000);
-
/* wait DiSEqC TX ready */
- for (i = 20, u8tmp = 1; i && u8tmp; i--) {
- usleep_range(5000, 10000);
+ #define SEND_MASTER_CMD_TIMEOUT 120
+ timeout = jiffies + msecs_to_jiffies(SEND_MASTER_CMD_TIMEOUT);
+
+ /* DiSEqC message typical period is 54 ms */
+ usleep_range(50000, 54000);
+ for (u8tmp = 1; !time_after(jiffies, timeout) && u8tmp;) {
ret = m88ds3103_rd_reg_mask(priv, 0xa1, &u8tmp, 0x40);
if (ret)
goto err;
}
- dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i);
-
- if (i == 0) {
+ if (u8tmp == 0) {
+ dev_dbg(&priv->i2c->dev, "%s: diseqc tx took %u ms\n", __func__,
+ jiffies_to_msecs(jiffies) -
+ (jiffies_to_msecs(timeout) - SEND_MASTER_CMD_TIMEOUT));
+ } else {
dev_dbg(&priv->i2c->dev, "%s: diseqc tx timeout\n", __func__);
ret = m88ds3103_wr_reg_mask(priv, 0xa1, 0x40, 0xc0);
@@ -1252,7 +1256,7 @@ static int m88ds3103_diseqc_send_master_cmd(struct dvb_frontend *fe,
if (ret)
goto err;
- if (i == 0) {
+ if (u8tmp == 1) {
ret = -ETIMEDOUT;
goto err;
}
@@ -1267,7 +1271,8 @@ static int m88ds3103_diseqc_send_burst(struct dvb_frontend *fe,
fe_sec_mini_cmd_t fe_sec_mini_cmd)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
- int ret, i;
+ int ret;
+ unsigned long timeout;
u8 u8tmp, burst;
dev_dbg(&priv->i2c->dev, "%s: fe_sec_mini_cmd=%d\n", __func__,
@@ -1301,26 +1306,36 @@ static int m88ds3103_diseqc_send_burst(struct dvb_frontend *fe,
if (ret)
goto err;
- /* DiSEqC ToneBurst period is 12.5 ms */
- usleep_range(11000, 20000);
-
/* wait DiSEqC TX ready */
- for (i = 5, u8tmp = 1; i && u8tmp; i--) {
- usleep_range(800, 2000);
+ #define SEND_BURST_TIMEOUT 40
+ timeout = jiffies + msecs_to_jiffies(SEND_BURST_TIMEOUT);
+
+ /* DiSEqC ToneBurst period is 12.5 ms */
+ usleep_range(8500, 12500);
+ for (u8tmp = 1; !time_after(jiffies, timeout) && u8tmp;) {
ret = m88ds3103_rd_reg_mask(priv, 0xa1, &u8tmp, 0x40);
if (ret)
goto err;
}
- dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i);
+ if (u8tmp == 0) {
+ dev_dbg(&priv->i2c->dev, "%s: diseqc tx took %u ms\n", __func__,
+ jiffies_to_msecs(jiffies) -
+ (jiffies_to_msecs(timeout) - SEND_BURST_TIMEOUT));
+ } else {
+ dev_dbg(&priv->i2c->dev, "%s: diseqc tx timeout\n", __func__);
+
+ ret = m88ds3103_wr_reg_mask(priv, 0xa1, 0x40, 0xc0);
+ if (ret)
+ goto err;
+ }
ret = m88ds3103_wr_reg_mask(priv, 0xa2, 0x80, 0xc0);
if (ret)
goto err;
- if (i == 0) {
- dev_dbg(&priv->i2c->dev, "%s: diseqc tx timeout\n", __func__);
+ if (u8tmp == 1) {
ret = -ETIMEDOUT;
goto err;
}

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