diff mbox

[2/2] mn88472: implement firmware parity check

Message ID 1418070667-13349-2-git-send-email-benjamin@southpole.se (mailing list archive)
State Superseded, archived
Headers

Commit Message

Benjamin Larsson Dec. 8, 2014, 8:31 p.m. UTC 
  Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
---
 drivers/staging/media/mn88472/mn88472.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Comments

Antti Palosaari Dec. 8, 2014, 8:59 p.m. UTC | #1 
Reviewed-by: Antti Palosaari <crope@iki.fi>

PS. something to say about logging levels... but as it is staging 
driver, criteria for patches is not so high yet.

regards
Antti

On 12/08/2014 10:31 PM, Benjamin Larsson wrote:
> Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
> ---
>   drivers/staging/media/mn88472/mn88472.c | 15 +++++++++++++++
>   1 file changed, 15 insertions(+)
>
> diff --git a/drivers/staging/media/mn88472/mn88472.c b/drivers/staging/media/mn88472/mn88472.c
> index df7dbe9..1df85a7 100644
> --- a/drivers/staging/media/mn88472/mn88472.c
> +++ b/drivers/staging/media/mn88472/mn88472.c
> @@ -294,6 +294,7 @@ static int mn88472_init(struct dvb_frontend *fe)
>   	int ret, len, remaining;
>   	const struct firmware *fw = NULL;
>   	u8 *fw_file = MN88472_FIRMWARE;
> +	unsigned int csum;
>
>   	dev_dbg(&client->dev, "\n");
>
> @@ -346,6 +347,20 @@ static int mn88472_init(struct dvb_frontend *fe)
>   		}
>   	}
>
> +	/* parity check of firmware */
> +	ret = regmap_read(dev->regmap[0], 0xf8, &csum);
> +	if (ret) {
> +		dev_err(&client->dev,
> +				"parity reg read failed=%d\n", ret);
> +		goto err;
> +	}
> +	if (csum & 0x10) {
> +		dev_err(&client->dev,
> +				"firmware parity check failed=0x%x\n", csum);
> +		goto err;
> +	}
> +	dev_err(&client->dev, "firmware parity check succeeded=0x%x\n", csum);
> +
>   	ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
>   	if (ret)
>   		goto err;
>
diff mbox

Patch

diff --git a/drivers/staging/media/mn88472/mn88472.c b/drivers/staging/media/mn88472/mn88472.c
index df7dbe9..1df85a7 100644
--- a/drivers/staging/media/mn88472/mn88472.c
+++ b/drivers/staging/media/mn88472/mn88472.c
@@ -294,6 +294,7 @@  static int mn88472_init(struct dvb_frontend *fe)
 	int ret, len, remaining;
 	const struct firmware *fw = NULL;
 	u8 *fw_file = MN88472_FIRMWARE;
+	unsigned int csum;
 
 	dev_dbg(&client->dev, "\n");
 
@@ -346,6 +347,20 @@  static int mn88472_init(struct dvb_frontend *fe)
 		}
 	}
 
+	/* parity check of firmware */
+	ret = regmap_read(dev->regmap[0], 0xf8, &csum);
+	if (ret) {
+		dev_err(&client->dev,
+				"parity reg read failed=%d\n", ret);
+		goto err;
+	}
+	if (csum & 0x10) {
+		dev_err(&client->dev,
+				"firmware parity check failed=0x%x\n", csum);
+		goto err;
+	}
+	dev_err(&client->dev, "firmware parity check succeeded=0x%x\n", csum);
+
 	ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
 	if (ret)
 		goto err;