于 2013年01月31日 05:25, Hans Verkuil 写道:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> This driver now passes the tuner and frequency tests of v4l2-compliance.
>
> It's the usual bugs: frequency wasn't clamped to the valid frequency range,
> incorrect tuner capabilities and tuner fields not filled in, missing test
> for invalid tuner index, no initial frequency and incorrect error handling.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> ---
> drivers/media/usb/tlg2300/pd-radio.c | 37
> +++++++++++++++++++---------------
> 1 file changed, 21 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/usb/tlg2300/pd-radio.c
> b/drivers/media/usb/tlg2300/pd-radio.c
> index 25eeb16..90dc1d1 100644
> --- a/drivers/media/usb/tlg2300/pd-radio.c
> +++ b/drivers/media/usb/tlg2300/pd-radio.c
> @@ -18,8 +18,8 @@ static int set_frequency(struct poseidon *p, __u32
> frequency);
> static int poseidon_fm_close(struct file *filp);
> static int poseidon_fm_open(struct file *filp);
>
> -#define TUNER_FREQ_MIN_FM 76000000
> -#define TUNER_FREQ_MAX_FM 108000000
> +#define TUNER_FREQ_MIN_FM 76000000U
> +#define TUNER_FREQ_MAX_FM 108000000U
>
> #define MAX_PREEMPHASIS (V4L2_PREEMPHASIS_75_uS + 1)
> static int preemphasis[MAX_PREEMPHASIS] = {
> @@ -170,13 +170,14 @@ static int tlg_fm_vidioc_g_tuner(struct file *file,
> void *priv,
> return -EINVAL;
>
> vt->type = V4L2_TUNER_RADIO;
> - vt->capability = V4L2_TUNER_CAP_STEREO;
> - vt->rangelow = TUNER_FREQ_MIN_FM / 62500;
> - vt->rangehigh = TUNER_FREQ_MAX_FM / 62500;
> + vt->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
> + vt->rangelow = TUNER_FREQ_MIN_FM * 2 / 125;
> + vt->rangehigh = TUNER_FREQ_MAX_FM * 2 / 125;
> vt->rxsubchans = V4L2_TUNER_SUB_STEREO;
> vt->audmode = V4L2_TUNER_MODE_STEREO;
> vt->signal = 0;
> vt->afc = 0;
> + strlcpy(vt->name, "Radio", sizeof(vt->name));
>
> mutex_lock(&p->lock);
> ret = send_get_req(p, TUNER_STATUS, TLG_MODE_FM_RADIO,
> @@ -207,6 +208,8 @@ static int fm_get_freq(struct file *file, void *priv,
> {
> struct poseidon *p = file->private_data;
>
> + if (argp->tuner)
> + return -EINVAL;
> argp->frequency = p->radio_data.fm_freq;
> return 0;
> }
> @@ -221,11 +224,8 @@ static int set_frequency(struct poseidon *p, __u32
> frequency)
> ret = send_set_req(p, TUNER_AUD_ANA_STD,
> p->radio_data.pre_emphasis, &status);
>
> - freq = (frequency * 125) * 500 / 1000;/* kHZ */
> - if (freq < TUNER_FREQ_MIN_FM/1000 || freq > TUNER_FREQ_MAX_FM/1000) {
> - ret = -EINVAL;
> - goto error;
> - }
> + freq = (frequency * 125) / 2; /* Hz */
> + freq = clamp(freq, TUNER_FREQ_MIN_FM, TUNER_FREQ_MAX_FM);
>
> ret = send_set_req(p, TUNE_FREQ_SELECT, freq, &status);
> if (ret < 0)
> @@ -240,7 +240,7 @@ static int set_frequency(struct poseidon *p, __u32
> frequency)
> TLG_TUNE_PLAY_SVC_START, &status);
> p->radio_data.is_radio_streaming = 1;
> }
> - p->radio_data.fm_freq = frequency;
> + p->radio_data.fm_freq = freq * 2 / 125;
> error:
> mutex_unlock(&p->lock);
> return ret;
> @@ -251,7 +251,9 @@ static int fm_set_freq(struct file *file, void *priv,
> {
> struct poseidon *p = file->private_data;
>
> - p->file_for_stream = file;
> + if (argp->tuner)
> + return -EINVAL;
> + p->file_for_stream = file;
> #ifdef CONFIG_PM
> p->pm_suspend = pm_fm_suspend;
> p->pm_resume = pm_fm_resume;
> @@ -401,16 +403,19 @@ static struct video_device poseidon_fm_template = {
> int poseidon_fm_init(struct poseidon *p)
> {
> struct video_device *fm_dev;
> + int err;
>
> fm_dev = vdev_init(p, &poseidon_fm_template);
> if (fm_dev == NULL)
> - return -1;
> + return -ENOMEM;
>
> - if (video_register_device(fm_dev, VFL_TYPE_RADIO, -1) < 0) {
> + p->radio_data.fm_dev = fm_dev;
> + set_frequency(p, TUNER_FREQ_MIN_FM);
> + err = video_register_device(fm_dev, VFL_TYPE_RADIO, -1);
> + if (err < 0) {
> video_device_release(fm_dev);
> - return -1;
> + return err;
> }
> - p->radio_data.fm_dev = fm_dev;
> return 0;
> }
>
thanks.
Acked-by: Huang Shijie <shij...@gmail.com>
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