// SPDX-License-Identifier: GPL-2.0-only
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/*
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* FM Driver for Connectivity chip of Texas Instruments.
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* This sub-module of FM driver implements FM TX functionality.
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*
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* Copyright (C) 2011 Texas Instruments
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*/
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#include <linux/delay.h>
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#include "fmdrv.h"
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#include "fmdrv_common.h"
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#include "fmdrv_tx.h"
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int fm_tx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
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{
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u16 payload;
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int ret;
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if (fmdev->tx_data.aud_mode == mode)
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return 0;
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fmdbg("stereo mode: %d\n", mode);
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/* Set Stereo/Mono mode */
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payload = (1 - mode);
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ret = fmc_send_cmd(fmdev, MONO_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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fmdev->tx_data.aud_mode = mode;
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return ret;
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}
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static int set_rds_text(struct fmdev *fmdev, u8 *rds_text)
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{
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u16 payload;
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int ret;
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ret = fmc_send_cmd(fmdev, RDS_DATA_SET, REG_WR, rds_text,
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strlen(rds_text), NULL, NULL);
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if (ret < 0)
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return ret;
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/* Scroll mode */
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payload = (u16)0x1;
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ret = fmc_send_cmd(fmdev, DISPLAY_MODE, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int set_rds_data_mode(struct fmdev *fmdev, u8 mode)
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{
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u16 payload;
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int ret;
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/* Setting unique PI TODO: how unique? */
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payload = (u16)0xcafe;
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ret = fmc_send_cmd(fmdev, PI_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* Set decoder id */
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payload = (u16)0xa;
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ret = fmc_send_cmd(fmdev, DI_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* TODO: RDS_MODE_GET? */
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return 0;
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}
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static int set_rds_len(struct fmdev *fmdev, u8 type, u16 len)
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{
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u16 payload;
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int ret;
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len |= type << 8;
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payload = len;
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ret = fmc_send_cmd(fmdev, RDS_CONFIG_DATA_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* TODO: LENGTH_GET? */
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return 0;
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}
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int fm_tx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
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{
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u16 payload;
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int ret;
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u8 rds_text[] = "Zoom2\n";
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fmdbg("rds_en_dis:%d(E:%d, D:%d)\n", rds_en_dis,
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FM_RDS_ENABLE, FM_RDS_DISABLE);
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if (rds_en_dis == FM_RDS_ENABLE) {
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/* Set RDS length */
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set_rds_len(fmdev, 0, strlen(rds_text));
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/* Set RDS text */
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set_rds_text(fmdev, rds_text);
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/* Set RDS mode */
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set_rds_data_mode(fmdev, 0x0);
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}
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/* Send command to enable RDS */
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if (rds_en_dis == FM_RDS_ENABLE)
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payload = 0x01;
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else
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payload = 0x00;
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ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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if (rds_en_dis == FM_RDS_ENABLE) {
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/* Set RDS length */
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set_rds_len(fmdev, 0, strlen(rds_text));
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/* Set RDS text */
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set_rds_text(fmdev, rds_text);
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}
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fmdev->tx_data.rds.flag = rds_en_dis;
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return 0;
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}
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int fm_tx_set_radio_text(struct fmdev *fmdev, u8 *rds_text, u8 rds_type)
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{
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u16 payload;
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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fm_tx_set_rds_mode(fmdev, 0);
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/* Set RDS length */
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set_rds_len(fmdev, rds_type, strlen(rds_text));
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/* Set RDS text */
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set_rds_text(fmdev, rds_text);
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/* Set RDS mode */
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set_rds_data_mode(fmdev, 0x0);
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payload = 1;
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ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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int fm_tx_set_af(struct fmdev *fmdev, u32 af)
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{
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u16 payload;
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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fmdbg("AF: %d\n", af);
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af = (af - 87500) / 100;
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payload = (u16)af;
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ret = fmc_send_cmd(fmdev, TA_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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int fm_tx_set_region(struct fmdev *fmdev, u8 region)
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{
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u16 payload;
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int ret;
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if (region != FM_BAND_EUROPE_US && region != FM_BAND_JAPAN) {
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fmerr("Invalid band\n");
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return -EINVAL;
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}
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/* Send command to set the band */
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payload = (u16)region;
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ret = fmc_send_cmd(fmdev, TX_BAND_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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int fm_tx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
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{
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u16 payload;
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int ret;
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fmdbg("tx: mute mode %d\n", mute_mode_toset);
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payload = mute_mode_toset;
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ret = fmc_send_cmd(fmdev, MUTE, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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return 0;
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}
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/* Set TX Audio I/O */
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static int set_audio_io(struct fmdev *fmdev)
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{
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struct fmtx_data *tx = &fmdev->tx_data;
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u16 payload;
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int ret;
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/* Set Audio I/O Enable */
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payload = tx->audio_io;
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ret = fmc_send_cmd(fmdev, AUDIO_IO_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* TODO: is audio set? */
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return 0;
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}
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/* Start TX Transmission */
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static int enable_xmit(struct fmdev *fmdev, u8 new_xmit_state)
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{
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struct fmtx_data *tx = &fmdev->tx_data;
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unsigned long timeleft;
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u16 payload;
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int ret;
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/* Enable POWER_ENB interrupts */
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payload = FM_POW_ENB_EVENT;
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ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* Set Power Enable */
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payload = new_xmit_state;
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ret = fmc_send_cmd(fmdev, POWER_ENB_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* Wait for Power Enabled */
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init_completion(&fmdev->maintask_comp);
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timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
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FM_DRV_TX_TIMEOUT);
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if (!timeleft) {
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fmerr("Timeout(%d sec),didn't get tune ended interrupt\n",
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jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
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return -ETIMEDOUT;
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}
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set_bit(FM_CORE_TX_XMITING, &fmdev->flag);
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tx->xmit_state = new_xmit_state;
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return 0;
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}
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/* Set TX power level */
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int fm_tx_set_pwr_lvl(struct fmdev *fmdev, u8 new_pwr_lvl)
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{
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u16 payload;
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struct fmtx_data *tx = &fmdev->tx_data;
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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fmdbg("tx: pwr_level_to_set %ld\n", (long int)new_pwr_lvl);
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/* If the core isn't ready update global variable */
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if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
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tx->pwr_lvl = new_pwr_lvl;
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return 0;
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}
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/* Set power level: Application will specify power level value in
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* units of dB/uV, whereas range and step are specific to FM chip.
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* For TI's WL chips, convert application specified power level value
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* to chip specific value by subtracting 122 from it. Refer to TI FM
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* data sheet for details.
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* */
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payload = (FM_PWR_LVL_HIGH - new_pwr_lvl);
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ret = fmc_send_cmd(fmdev, POWER_LEV_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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/* TODO: is the power level set? */
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tx->pwr_lvl = new_pwr_lvl;
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return 0;
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}
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/*
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* Sets FM TX pre-emphasis filter value (OFF, 50us, or 75us)
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* Convert V4L2 specified filter values to chip specific filter values.
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*/
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int fm_tx_set_preemph_filter(struct fmdev *fmdev, u32 preemphasis)
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{
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struct fmtx_data *tx = &fmdev->tx_data;
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u16 payload;
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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switch (preemphasis) {
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case V4L2_PREEMPHASIS_DISABLED:
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payload = FM_TX_PREEMPH_OFF;
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break;
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case V4L2_PREEMPHASIS_50_uS:
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payload = FM_TX_PREEMPH_50US;
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break;
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case V4L2_PREEMPHASIS_75_uS:
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payload = FM_TX_PREEMPH_75US;
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break;
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}
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ret = fmc_send_cmd(fmdev, PREMPH_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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tx->preemph = payload;
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return ret;
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}
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/* Get the TX tuning capacitor value.*/
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int fm_tx_get_tune_cap_val(struct fmdev *fmdev)
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{
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u16 curr_val;
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u32 resp_len;
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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ret = fmc_send_cmd(fmdev, READ_FMANT_TUNE_VALUE, REG_RD,
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NULL, sizeof(curr_val), &curr_val, &resp_len);
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if (ret < 0)
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return ret;
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curr_val = be16_to_cpu((__force __be16)curr_val);
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return curr_val;
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}
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/* Set TX Frequency */
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int fm_tx_set_freq(struct fmdev *fmdev, u32 freq_to_set)
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{
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struct fmtx_data *tx = &fmdev->tx_data;
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u16 payload, chanl_index;
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int ret;
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if (test_bit(FM_CORE_TX_XMITING, &fmdev->flag)) {
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enable_xmit(fmdev, 0);
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clear_bit(FM_CORE_TX_XMITING, &fmdev->flag);
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}
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/* Enable FR, BL interrupts */
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payload = (FM_FR_EVENT | FM_BL_EVENT);
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ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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tx->tx_frq = (unsigned long)freq_to_set;
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fmdbg("tx: freq_to_set %ld\n", (long int)tx->tx_frq);
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chanl_index = freq_to_set / 10;
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/* Set current tuner channel */
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payload = chanl_index;
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ret = fmc_send_cmd(fmdev, CHANL_SET, REG_WR, &payload,
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sizeof(payload), NULL, NULL);
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if (ret < 0)
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return ret;
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fm_tx_set_pwr_lvl(fmdev, tx->pwr_lvl);
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fm_tx_set_preemph_filter(fmdev, tx->preemph);
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tx->audio_io = 0x01; /* I2S */
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set_audio_io(fmdev);
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enable_xmit(fmdev, 0x01); /* Enable transmission */
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tx->aud_mode = FM_STEREO_MODE;
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tx->rds.flag = FM_RDS_DISABLE;
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return 0;
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}
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