[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: Manjunatha Halli <manjunatha_halli@ti.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 462 insertions, 0 deletions

diff --git a/drivers/media/radio/wl128x/fmdrv_tx.c b/drivers/media/radio/wl128x/fmdrv_tx.c
new file mode 100644
index 000000000000..be54068b56a8
--- /dev/null
+++ b/drivers/media/radio/wl128x/fmdrv_tx.c
@@ -0,0 +1,425 @@
+/*
+ *  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;
+}
+
diff --git a/drivers/media/radio/wl128x/fmdrv_tx.h b/drivers/media/radio/wl128x/fmdrv_tx.h
new file mode 100644
index 000000000000..e393a2bdd49e
--- /dev/null
+++ b/drivers/media/radio/wl128x/fmdrv_tx.h
@@ -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
+