int fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,
u32 wrap_around, u32 spacing)
{
u32 resp_len;
u16 curr_frq, next_frq, last_frq;
u16 payload, int_reason, intr_flag;
u16 offset, space_idx;
unsigned long timeleft;
int ret;
/* Set channel spacing */
ret = fm_rx_set_channel_spacing(fmdev, spacing);
if (ret < 0) {
fmerr("Failed to set channel spacing\n");
return ret;
}
/* Read the current frequency from chip */
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
sizeof(curr_frq), &curr_frq, &resp_len);
if (ret < 0)
return ret;
curr_frq = be16_to_cpu((__force __be16)curr_frq);
last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
/* Check the offset in order to be aligned to the channel spacing*/
space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;
offset = curr_frq % space_idx;
next_frq = seek_upward ? curr_frq + space_idx /* Seek Up */ :
curr_frq - space_idx /* Seek Down */ ;
/*
* Add or subtract offset in order to stay aligned to the channel
* spacing.
*/
if ((short)next_frq < 0)
next_frq = last_frq - offset;
else if (next_frq > last_frq)
next_frq = 0 + offset;
again:
/* Set calculated next frequency to perform seek */
payload = next_frq;
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* Set search direction (0:Seek Down, 1:Seek Up) */
payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);
ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* Read flags - just to clear any pending interrupts if we had */
ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
if (ret < 0)
return ret;
/* Enable FR, BL interrupts */
intr_flag = fmdev->irq_info.mask;
fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
payload = fmdev->irq_info.mask;
ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* Start seek */
payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;
ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* Wait for tune ended/band limit reached interrupt */
init_completion(&fmdev->maintask_comp);
timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
FM_DRV_RX_SEEK_TIMEOUT);
if (!timeleft) {
fmerr("Timeout(%d sec),didn't get tune ended int\n",
jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);
return -ENODATA;
}
int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);
/* Re-enable default FM interrupts */
fmdev->irq_info.mask = intr_flag;
payload = fmdev->irq_info.mask;
ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
if (int_reason & FM_BL_EVENT) {
if (wrap_around == 0) {
fmdev->rx.freq = seek_upward ?
fmdev->rx.region.top_freq :
fmdev->rx.region.bot_freq;
} else {
fmdev->rx.freq = seek_upward ?
fmdev->rx.region.bot_freq :
fmdev->rx.region.top_freq;
/* Calculate frequency index to write */
next_frq = (fmdev->rx.freq -
fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
goto again;
}
} else {
/* Read freq to know where operation tune operation stopped */
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,
&curr_frq, &resp_len);
if (ret < 0)
return ret;
curr_frq = be16_to_cpu((__force __be16)curr_frq);
fmdev->rx.freq = (fmdev->rx.region.bot_freq +
((u32)curr_frq * FM_FREQ_MUL));
}
/* Reset RDS cache and current station pointers */
fm_rx_reset_rds_cache(fmdev);
fm_rx_reset_station_info(fmdev);
return ret;
}
int fm_rx_seek(struct fmdev *fmdev, u32 seek_upward,
u32 wrap_around, u32 spacing)
{
u32 resp_len;
u16 curr_frq, next_frq, last_frq;
u16 payload, int_reason, intr_flag;
u16 offset, space_idx;
unsigned long timeleft;
int ret;
/* */
ret = fm_rx_set_channel_spacing(fmdev, spacing);
if (ret < 0) {
fmerr("Failed to set channel spacing\n");
return ret;
}
/* */
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL,
sizeof(curr_frq), &curr_frq, &resp_len);
if (ret < 0)
return ret;
curr_frq = be16_to_cpu(curr_frq);
last_frq = (fmdev->rx.region.top_freq - fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
/* */
space_idx = fmdev->rx.region.chanl_space / FM_FREQ_MUL;
offset = curr_frq % space_idx;
next_frq = seek_upward ? curr_frq + space_idx /* */ :
curr_frq - space_idx /* */ ;
/*
*/
if ((short)next_frq < 0)
next_frq = last_frq - offset;
else if (next_frq > last_frq)
next_frq = 0 + offset;
again:
/* */
payload = next_frq;
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* */
payload = (seek_upward ? FM_SEARCH_DIRECTION_UP : FM_SEARCH_DIRECTION_DOWN);
ret = fmc_send_cmd(fmdev, SEARCH_DIR_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* */
ret = fmc_send_cmd(fmdev, FLAG_GET, REG_RD, NULL, 2, NULL, NULL);
if (ret < 0)
return ret;
/* */
intr_flag = fmdev->irq_info.mask;
fmdev->irq_info.mask = (FM_FR_EVENT | FM_BL_EVENT);
payload = fmdev->irq_info.mask;
ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* */
payload = FM_TUNER_AUTONOMOUS_SEARCH_MODE;
ret = fmc_send_cmd(fmdev, TUNER_MODE_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
/* */
init_completion(&fmdev->maintask_comp);
timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
FM_DRV_RX_SEEK_TIMEOUT);
if (!timeleft) {
fmerr("Timeout(%d sec),didn't get tune ended int\n",
jiffies_to_msecs(FM_DRV_RX_SEEK_TIMEOUT) / 1000);
return -ETIMEDOUT;
}
int_reason = fmdev->irq_info.flag & (FM_TUNE_COMPLETE | FM_BAND_LIMIT);
/* */
fmdev->irq_info.mask = intr_flag;
payload = fmdev->irq_info.mask;
ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
sizeof(payload), NULL, NULL);
if (ret < 0)
return ret;
if (int_reason & FM_BL_EVENT) {
if (wrap_around == 0) {
fmdev->rx.freq = seek_upward ?
fmdev->rx.region.top_freq :
fmdev->rx.region.bot_freq;
} else {
fmdev->rx.freq = seek_upward ?
fmdev->rx.region.bot_freq :
fmdev->rx.region.top_freq;
/* */
next_frq = (fmdev->rx.freq -
fmdev->rx.region.bot_freq) / FM_FREQ_MUL;
goto again;
}
} else {
/* */
ret = fmc_send_cmd(fmdev, FREQ_SET, REG_RD, NULL, 2,
&curr_frq, &resp_len);
if (ret < 0)
return ret;
curr_frq = be16_to_cpu(curr_frq);
fmdev->rx.freq = (fmdev->rx.region.bot_freq +
((u32)curr_frq * FM_FREQ_MUL));
}
/* */
fm_rx_reset_rds_cache(fmdev);
fm_rx_reset_station_info(fmdev);
return ret;
}
