[media] drivers:media:radio: wl128x: FM driver TX sources

This has implementation for FM TX functionality.
It communicates with FM V4l2 module and FM common module.
Signed-off-by: NManjunatha Halli <manjunatha_halli@ti.com>
Reviewed-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/radio/wl128x/fmdrv_tx.c

+/*
+ *  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;
+}
+

drivers/media/radio/wl128x/fmdrv_tx.h

+/*
+ *  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
+