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linux/drivers/media/radio/wl128x/fmdrv_tx.c
Manjunatha Halli 8b7a186c9b [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>
2011-03-21 20:32:36 -03:00

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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;
}
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