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413 lines
8.5 KiB
413 lines
8.5 KiB
// 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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