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; }