/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
static int amradio_set_freq(struct amradio_device *radio, int freq)
{
- unsigned short freq_send = 0x10 + (freq >> 3) / 25;
+ unsigned short freq_send;
u8 buf[3];
int retval;
+ /* we need to be sure that frequency isn't out of range */
+ freq = clamp_t(unsigned, freq, FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL);
+ freq_send = 0x10 + (freq >> 3) / 25;
+
/* frequency is calculated from freq_send and placed in first 2 bytes */
buf[0] = (freq_send >> 8) & 0xff;
buf[1] = freq_send & 0xff;
if (f->tuner != 0)
return -EINVAL;
- return amradio_set_freq(radio, clamp_t(unsigned, f->frequency,
- FREQ_MIN * FREQ_MUL, FREQ_MAX * FREQ_MUL));
+ return amradio_set_freq(radio, f->frequency);
}
/* vidioc_g_frequency - get tuner radio frequency */
continue;
amradio_send_cmd(radio, AMRADIO_GET_FREQ, 0, NULL, 0, true);
if (radio->buffer[1] || radio->buffer[2]) {
+ /* To check: sometimes radio->curfreq is set to out of range value */
radio->curfreq = (radio->buffer[1] << 8) | radio->buffer[2];
radio->curfreq = (radio->curfreq - 0x10) * 200;
amradio_send_cmd(radio, AMRADIO_STOP_SEARCH,