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+/*
+ * FM Driver for Connectivity chip of Texas Instruments.
+ * This sub-module of FM driver implements FM TX functionality.
+ *
+ * Copyright (C) 2011 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/delay.h>
+#include "fmdrv.h"
+#include "fmdrv_common.h"
+#include "fmdrv_tx.h"
+
+u32 fm_tx_set_stereo_mono(struct fmdev *fmdev, u16 mode)
+{
+ u16 payload;
+ u32 ret;
+
+ if (fmdev->tx_data.aud_mode == mode)
+ return 0;
+
+ fmdbg("stereo mode: %d\n", mode);
+
+ /* Set Stereo/Mono mode */
+ payload = (1 - mode);
+ ret = fmc_send_cmd(fmdev, MONO_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ fmdev->tx_data.aud_mode = mode;
+
+ return ret;
+}
+
+static u32 set_rds_text(struct fmdev *fmdev, u8 *rds_text)
+{
+ u16 payload;
+ u32 ret;
+
+ ret = fmc_send_cmd(fmdev, RDS_DATA_SET, REG_WR, rds_text,
+ strlen(rds_text), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* Scroll mode */
+ payload = (u16)0x1;
+ ret = fmc_send_cmd(fmdev, DISPLAY_MODE, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static u32 set_rds_data_mode(struct fmdev *fmdev, u8 mode)
+{
+ u16 payload;
+ u32 ret;
+
+ /* Setting unique PI TODO: how unique? */
+ payload = (u16)0xcafe;
+ ret = fmc_send_cmd(fmdev, PI_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* Set decoder id */
+ payload = (u16)0xa;
+ ret = fmc_send_cmd(fmdev, DI_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* TODO: RDS_MODE_GET? */
+ return 0;
+}
+
+static u32 set_rds_len(struct fmdev *fmdev, u8 type, u16 len)
+{
+ u16 payload;
+ u32 ret;
+
+ len |= type << 8;
+ payload = len;
+ ret = fmc_send_cmd(fmdev, RDS_CONFIG_DATA_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* TODO: LENGTH_GET? */
+ return 0;
+}
+
+u32 fm_tx_set_rds_mode(struct fmdev *fmdev, u8 rds_en_dis)
+{
+ u16 payload;
+ u32 ret;
+ u8 rds_text[] = "Zoom2\n";
+
+ fmdbg("rds_en_dis:%d(E:%d, D:%d)\n", rds_en_dis,
+ FM_RDS_ENABLE, FM_RDS_DISABLE);
+
+ if (rds_en_dis == FM_RDS_ENABLE) {
+ /* Set RDS length */
+ set_rds_len(fmdev, 0, strlen(rds_text));
+
+ /* Set RDS text */
+ set_rds_text(fmdev, rds_text);
+
+ /* Set RDS mode */
+ set_rds_data_mode(fmdev, 0x0);
+ }
+
+ /* Send command to enable RDS */
+ if (rds_en_dis == FM_RDS_ENABLE)
+ payload = 0x01;
+ else
+ payload = 0x00;
+
+ ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ if (rds_en_dis == FM_RDS_ENABLE) {
+ /* Set RDS length */
+ set_rds_len(fmdev, 0, strlen(rds_text));
+
+ /* Set RDS text */
+ set_rds_text(fmdev, rds_text);
+ }
+ fmdev->tx_data.rds.flag = rds_en_dis;
+
+ return 0;
+}
+
+u32 fm_tx_set_radio_text(struct fmdev *fmdev, u8 *rds_text, u8 rds_type)
+{
+ u16 payload;
+ u32 ret;
+
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ return -EPERM;
+
+ fm_tx_set_rds_mode(fmdev, 0);
+
+ /* Set RDS length */
+ set_rds_len(fmdev, rds_type, strlen(rds_text));
+
+ /* Set RDS text */
+ set_rds_text(fmdev, rds_text);
+
+ /* Set RDS mode */
+ set_rds_data_mode(fmdev, 0x0);
+
+ payload = 1;
+ ret = fmc_send_cmd(fmdev, RDS_DATA_ENB, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+u32 fm_tx_set_af(struct fmdev *fmdev, u32 af)
+{
+ u16 payload;
+ u32 ret;
+
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ return -EPERM;
+
+ fmdbg("AF: %d\n", af);
+
+ af = (af - 87500) / 100;
+ payload = (u16)af;
+ ret = fmc_send_cmd(fmdev, TA_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+u32 fm_tx_set_region(struct fmdev *fmdev, u8 region)
+{
+ u16 payload;
+ u32 ret;
+
+ if (region != FM_BAND_EUROPE_US && region != FM_BAND_JAPAN) {
+ fmerr("Invalid band\n");
+ return -EINVAL;
+ }
+
+ /* Send command to set the band */
+ payload = (u16)region;
+ ret = fmc_send_cmd(fmdev, TX_BAND_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+u32 fm_tx_set_mute_mode(struct fmdev *fmdev, u8 mute_mode_toset)
+{
+ u16 payload;
+ u32 ret;
+
+ fmdbg("tx: mute mode %d\n", mute_mode_toset);
+
+ payload = mute_mode_toset;
+ ret = fmc_send_cmd(fmdev, MUTE, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/* Set TX Audio I/O */
+static u32 set_audio_io(struct fmdev *fmdev)
+{
+ struct fmtx_data *tx = &fmdev->tx_data;
+ u16 payload;
+ u32 ret;
+
+ /* Set Audio I/O Enable */
+ payload = tx->audio_io;
+ ret = fmc_send_cmd(fmdev, AUDIO_IO_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* TODO: is audio set? */
+ return 0;
+}
+
+/* Start TX Transmission */
+static u32 enable_xmit(struct fmdev *fmdev, u8 new_xmit_state)
+{
+ struct fmtx_data *tx = &fmdev->tx_data;
+ unsigned long timeleft;
+ u16 payload;
+ u32 ret;
+
+ /* Enable POWER_ENB interrupts */
+ payload = FM_POW_ENB_EVENT;
+ ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* Set Power Enable */
+ payload = new_xmit_state;
+ ret = fmc_send_cmd(fmdev, POWER_ENB_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* Wait for Power Enabled */
+ init_completion(&fmdev->maintask_comp);
+ timeleft = wait_for_completion_timeout(&fmdev->maintask_comp,
+ FM_DRV_TX_TIMEOUT);
+ if (!timeleft) {
+ fmerr("Timeout(%d sec),didn't get tune ended interrupt\n",
+ jiffies_to_msecs(FM_DRV_TX_TIMEOUT) / 1000);
+ return -ETIMEDOUT;
+ }
+
+ set_bit(FM_CORE_TX_XMITING, &fmdev->flag);
+ tx->xmit_state = new_xmit_state;
+
+ return 0;
+}
+
+/* Set TX power level */
+u32 fm_tx_set_pwr_lvl(struct fmdev *fmdev, u8 new_pwr_lvl)
+{
+ u16 payload;
+ struct fmtx_data *tx = &fmdev->tx_data;
+ u32 ret;
+
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ return -EPERM;
+ fmdbg("tx: pwr_level_to_set %ld\n", (long int)new_pwr_lvl);
+
+ /* If the core isn't ready update global variable */
+ if (!test_bit(FM_CORE_READY, &fmdev->flag)) {
+ tx->pwr_lvl = new_pwr_lvl;
+ return 0;
+ }
+
+ /* Set power level: Application will specify power level value in
+ * units of dB/uV, whereas range and step are specific to FM chip.
+ * For TI's WL chips, convert application specified power level value
+ * to chip specific value by subtracting 122 from it. Refer to TI FM
+ * data sheet for details.
+ * */
+
+ payload = (FM_PWR_LVL_HIGH - new_pwr_lvl);
+ ret = fmc_send_cmd(fmdev, POWER_LEV_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ /* TODO: is the power level set? */
+ tx->pwr_lvl = new_pwr_lvl;
+
+ return 0;
+}
+
+/*
+ * Sets FM TX pre-emphasis filter value (OFF, 50us, or 75us)
+ * Convert V4L2 specified filter values to chip specific filter values.
+ */
+u32 fm_tx_set_preemph_filter(struct fmdev *fmdev, u32 preemphasis)
+{
+ struct fmtx_data *tx = &fmdev->tx_data;
+ u16 payload;
+ u32 ret;
+
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ return -EPERM;
+
+ switch (preemphasis) {
+ case V4L2_PREEMPHASIS_DISABLED:
+ payload = FM_TX_PREEMPH_OFF;
+ break;
+ case V4L2_PREEMPHASIS_50_uS:
+ payload = FM_TX_PREEMPH_50US;
+ break;
+ case V4L2_PREEMPHASIS_75_uS:
+ payload = FM_TX_PREEMPH_75US;
+ break;
+ }
+
+ ret = fmc_send_cmd(fmdev, PREMPH_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ tx->preemph = payload;
+
+ return ret;
+}
+
+/* Get the TX tuning capacitor value.*/
+u32 fm_tx_get_tune_cap_val(struct fmdev *fmdev)
+{
+ u16 curr_val;
+ u32 ret, resp_len;
+
+ if (fmdev->curr_fmmode != FM_MODE_TX)
+ return -EPERM;
+
+ ret = fmc_send_cmd(fmdev, READ_FMANT_TUNE_VALUE, REG_RD,
+ NULL, sizeof(curr_val), &curr_val, &resp_len);
+ if (ret < 0)
+ return ret;
+
+ curr_val = be16_to_cpu(curr_val);
+
+ return curr_val;
+}
+
+/* Set TX Frequency */
+u32 fm_tx_set_freq(struct fmdev *fmdev, u32 freq_to_set)
+{
+ struct fmtx_data *tx = &fmdev->tx_data;
+ u16 payload, chanl_index;
+ u32 ret;
+
+ if (test_bit(FM_CORE_TX_XMITING, &fmdev->flag)) {
+ enable_xmit(fmdev, 0);
+ clear_bit(FM_CORE_TX_XMITING, &fmdev->flag);
+ }
+
+ /* Enable FR, BL interrupts */
+ payload = (FM_FR_EVENT | FM_BL_EVENT);
+ ret = fmc_send_cmd(fmdev, INT_MASK_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ tx->tx_frq = (unsigned long)freq_to_set;
+ fmdbg("tx: freq_to_set %ld\n", (long int)tx->tx_frq);
+
+ chanl_index = freq_to_set / 10;
+
+ /* Set current tuner channel */
+ payload = chanl_index;
+ ret = fmc_send_cmd(fmdev, CHANL_SET, REG_WR, &payload,
+ sizeof(payload), NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ fm_tx_set_pwr_lvl(fmdev, tx->pwr_lvl);
+ fm_tx_set_preemph_filter(fmdev, tx->preemph);
+
+ tx->audio_io = 0x01; /* I2S */
+ set_audio_io(fmdev);
+
+ enable_xmit(fmdev, 0x01); /* Enable transmission */
+
+ tx->aud_mode = FM_STEREO_MODE;
+ tx->rds.flag = FM_RDS_DISABLE;
+
+ return 0;
+}
+
new file mode 100644
@@ -0,0 +1,37 @@
+/*
+ * FM Driver for Connectivity chip of Texas Instruments.
+ * FM TX module header.
+ *
+ * Copyright (C) 2011 Texas Instruments
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef _FMDRV_TX_H
+#define _FMDRV_TX_H
+
+u32 fm_tx_set_freq(struct fmdev *, u32);
+u32 fm_tx_set_pwr_lvl(struct fmdev *, u8);
+u32 fm_tx_set_region(struct fmdev *, u8);
+u32 fm_tx_set_mute_mode(struct fmdev *, u8);
+u32 fm_tx_set_stereo_mono(struct fmdev *, u16);
+u32 fm_tx_set_rds_mode(struct fmdev *, u8);
+u32 fm_tx_set_radio_text(struct fmdev *, u8 *, u8);
+u32 fm_tx_set_af(struct fmdev *, u32);
+u32 fm_tx_set_preemph_filter(struct fmdev *, u32);
+u32 fm_tx_get_tune_cap_val(struct fmdev *);
+
+#endif
+