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[media] drivers:media:radio: wl128x: FM Driver V4L2 sources
This module interfaces V4L2 subsystem and FM common module. It registers itself with V4L2 as Radio 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>
This commit is contained in:
Manjunatha Halli
Mauro Carvalho Chehab
parent
8d19824ba2
commit
7e38849631
580
drivers/media/radio/wl128x/fmdrv_v4l2.c
Normal file
580
drivers/media/radio/wl128x/fmdrv_v4l2.c
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@ -0,0 +1,580 @@
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/*
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* FM Driver for Connectivity chip of Texas Instruments.
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* This file provides interfaces to V4L2 subsystem.
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*
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* This module registers with V4L2 subsystem as Radio
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* data system interface (/dev/radio). During the registration,
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* it will expose two set of function pointers.
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*
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* 1) File operation related API (open, close, read, write, poll...etc).
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* 2) Set of V4L2 IOCTL complaint API.
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*
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* Copyright (C) 2011 Texas Instruments
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* Author: Raja Mani <raja_mani@ti.com>
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* Author: Manjunatha Halli <manjunatha_halli@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "fmdrv.h"
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#include "fmdrv_v4l2.h"
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#include "fmdrv_common.h"
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#include "fmdrv_rx.h"
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#include "fmdrv_tx.h"
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static struct video_device *gradio_dev;
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static u8 radio_disconnected;
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/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */
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/* Read RX RDS data */
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static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf,
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size_t count, loff_t *ppos)
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{
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u8 rds_mode;
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int ret;
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struct fmdev *fmdev;
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fmdev = video_drvdata(file);
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if (!radio_disconnected) {
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fmerr("FM device is already disconnected\n");
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return -EIO;
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}
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/* Turn on RDS mode , if it is disabled */
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ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
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if (ret < 0) {
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fmerr("Unable to read current rds mode\n");
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return ret;
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}
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if (rds_mode == FM_RDS_DISABLE) {
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ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
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if (ret < 0) {
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fmerr("Failed to enable rds mode\n");
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return ret;
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}
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}
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/* Copy RDS data from internal buffer to user buffer */
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return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
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}
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/* Write TX RDS data */
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static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf,
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size_t count, loff_t *ppos)
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{
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struct tx_rds rds;
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int ret;
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struct fmdev *fmdev;
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ret = copy_from_user(&rds, buf, sizeof(rds));
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fmdbg("(%d)type: %d, text %s, af %d\n",
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ret, rds.text_type, rds.text, rds.af_freq);
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fmdev = video_drvdata(file);
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fm_tx_set_radio_text(fmdev, rds.text, rds.text_type);
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fm_tx_set_af(fmdev, rds.af_freq);
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return 0;
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}
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static u32 fm_v4l2_fops_poll(struct file *file, struct poll_table_struct *pts)
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{
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int ret;
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struct fmdev *fmdev;
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fmdev = video_drvdata(file);
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ret = fmc_is_rds_data_available(fmdev, file, pts);
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if (ret < 0)
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return POLLIN | POLLRDNORM;
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return 0;
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}
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/*
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* Handle open request for "/dev/radioX" device.
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* Start with FM RX mode as default.
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*/
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static int fm_v4l2_fops_open(struct file *file)
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{
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int ret;
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struct fmdev *fmdev = NULL;
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/* Don't allow multiple open */
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if (radio_disconnected) {
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fmerr("FM device is already opened\n");
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return -EBUSY;
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}
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fmdev = video_drvdata(file);
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ret = fmc_prepare(fmdev);
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if (ret < 0) {
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fmerr("Unable to prepare FM CORE\n");
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return ret;
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}
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fmdbg("Load FM RX firmware..\n");
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ret = fmc_set_mode(fmdev, FM_MODE_RX);
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if (ret < 0) {
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fmerr("Unable to load FM RX firmware\n");
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return ret;
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}
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radio_disconnected = 1;
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return ret;
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}
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static int fm_v4l2_fops_release(struct file *file)
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{
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int ret;
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struct fmdev *fmdev;
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fmdev = video_drvdata(file);
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if (!radio_disconnected) {
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fmdbg("FM device is already closed\n");
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return 0;
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}
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ret = fmc_set_mode(fmdev, FM_MODE_OFF);
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if (ret < 0) {
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fmerr("Unable to turn off the chip\n");
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return ret;
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}
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ret = fmc_release(fmdev);
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if (ret < 0) {
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fmerr("FM CORE release failed\n");
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return ret;
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}
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radio_disconnected = 0;
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return ret;
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}
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/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */
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static int fm_v4l2_vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *capability)
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{
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strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver));
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strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME,
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sizeof(capability->card));
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sprintf(capability->bus_info, "UART");
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capability->version = FM_DRV_RADIO_VERSION;
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capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER |
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V4L2_CAP_RADIO | V4L2_CAP_MODULATOR |
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V4L2_CAP_AUDIO | V4L2_CAP_READWRITE |
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V4L2_CAP_RDS_CAPTURE;
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return 0;
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}
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static int fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct fmdev *fmdev = container_of(ctrl->handler,
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struct fmdev, ctrl_handler);
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switch (ctrl->id) {
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case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
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ctrl->val = fm_tx_get_tune_cap_val(fmdev);
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break;
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default:
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fmwarn("%s: Unknown IOCTL: %d\n", __func__, ctrl->id);
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break;
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}
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return 0;
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}
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static int fm_v4l2_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct fmdev *fmdev = container_of(ctrl->handler,
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struct fmdev, ctrl_handler);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_VOLUME: /* set volume */
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return fm_rx_set_volume(fmdev, (u16)ctrl->val);
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case V4L2_CID_AUDIO_MUTE: /* set mute */
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return fmc_set_mute_mode(fmdev, (u8)ctrl->val);
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case V4L2_CID_TUNE_POWER_LEVEL:
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/* set TX power level - ext control */
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return fm_tx_set_pwr_lvl(fmdev, (u8)ctrl->val);
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case V4L2_CID_TUNE_PREEMPHASIS:
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return fm_tx_set_preemph_filter(fmdev, (u8) ctrl->val);
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default:
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return -EINVAL;
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}
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}
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static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *audio)
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{
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memset(audio, 0, sizeof(*audio));
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strcpy(audio->name, "Radio");
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audio->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *audio)
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{
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if (audio->index != 0)
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return -EINVAL;
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return 0;
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}
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/* Get tuner attributes. If current mode is NOT RX, return error */
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static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *tuner)
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{
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struct fmdev *fmdev = video_drvdata(file);
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u32 bottom_freq;
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u32 top_freq;
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u16 stereo_mono_mode;
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u16 rssilvl;
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int ret;
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if (tuner->index != 0)
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return -EINVAL;
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if (fmdev->curr_fmmode != FM_MODE_RX)
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return -EPERM;
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ret = fm_rx_get_band_freq_range(fmdev, &bottom_freq, &top_freq);
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if (ret != 0)
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return ret;
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ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode);
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if (ret != 0)
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return ret;
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ret = fm_rx_get_rssi_level(fmdev, &rssilvl);
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if (ret != 0)
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return ret;
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strcpy(tuner->name, "FM");
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tuner->type = V4L2_TUNER_RADIO;
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/* Store rangelow and rangehigh freq in unit of 62.5 Hz */
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tuner->rangelow = bottom_freq * 16;
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tuner->rangehigh = top_freq * 16;
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tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO |
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((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0);
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tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
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V4L2_TUNER_CAP_LOW;
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tuner->audmode = (stereo_mono_mode ?
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V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO);
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/*
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* Actual rssi value lies in between -128 to +127.
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* Convert this range from 0 to 255 by adding +128
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*/
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rssilvl += 128;
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/*
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* Return signal strength value should be within 0 to 65535.
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* Find out correct signal radio by multiplying (65535/255) = 257
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*/
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tuner->signal = rssilvl * 257;
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tuner->afc = 0;
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return ret;
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}
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/*
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* Set tuner attributes. If current mode is NOT RX, set to RX.
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* Currently, we set only audio mode (mono/stereo) and RDS state (on/off).
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* Should we set other tuner attributes, too?
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*/
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static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *tuner)
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{
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struct fmdev *fmdev = video_drvdata(file);
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u16 aud_mode;
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u8 rds_mode;
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int ret;
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if (tuner->index != 0)
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return -EINVAL;
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aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ?
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FM_STEREO_MODE : FM_MONO_MODE;
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rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ?
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FM_RDS_ENABLE : FM_RDS_DISABLE;
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if (fmdev->curr_fmmode != FM_MODE_RX) {
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ret = fmc_set_mode(fmdev, FM_MODE_RX);
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if (ret < 0) {
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fmerr("Failed to set RX mode\n");
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return ret;
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}
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}
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ret = fmc_set_stereo_mono(fmdev, aud_mode);
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if (ret < 0) {
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fmerr("Failed to set RX stereo/mono mode\n");
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return ret;
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}
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ret = fmc_set_rds_mode(fmdev, rds_mode);
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if (ret < 0)
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fmerr("Failed to set RX RDS mode\n");
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return ret;
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}
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/* Get tuner or modulator radio frequency */
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static int fm_v4l2_vidioc_g_freq(struct file *file, void *priv,
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struct v4l2_frequency *freq)
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{
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struct fmdev *fmdev = video_drvdata(file);
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int ret;
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ret = fmc_get_freq(fmdev, &freq->frequency);
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if (ret < 0) {
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fmerr("Failed to get frequency\n");
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return ret;
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}
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/* Frequency unit of 62.5 Hz*/
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freq->frequency = (u32) freq->frequency * 16;
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return 0;
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}
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/* Set tuner or modulator radio frequency */
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static int fm_v4l2_vidioc_s_freq(struct file *file, void *priv,
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struct v4l2_frequency *freq)
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{
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struct fmdev *fmdev = video_drvdata(file);
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/*
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* As V4L2_TUNER_CAP_LOW is set 1 user sends the frequency
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* in units of 62.5 Hz.
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*/
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freq->frequency = (u32)(freq->frequency / 16);
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return fmc_set_freq(fmdev, freq->frequency);
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}
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/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */
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static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv,
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struct v4l2_hw_freq_seek *seek)
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{
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struct fmdev *fmdev = video_drvdata(file);
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int ret;
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if (fmdev->curr_fmmode != FM_MODE_RX) {
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ret = fmc_set_mode(fmdev, FM_MODE_RX);
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if (ret != 0) {
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fmerr("Failed to set RX mode\n");
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return ret;
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}
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}
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ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around,
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seek->spacing);
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if (ret < 0)
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fmerr("RX seek failed - %d\n", ret);
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return ret;
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}
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/* Get modulator attributes. If mode is not TX, return no attributes. */
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static int fm_v4l2_vidioc_g_modulator(struct file *file, void *priv,
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struct v4l2_modulator *mod)
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{
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struct fmdev *fmdev = video_drvdata(file);;
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if (mod->index != 0)
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return -EINVAL;
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if (fmdev->curr_fmmode != FM_MODE_TX)
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return -EPERM;
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mod->txsubchans = ((fmdev->tx_data.aud_mode == FM_STEREO_MODE) ?
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V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO) |
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((fmdev->tx_data.rds.flag == FM_RDS_ENABLE) ?
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V4L2_TUNER_SUB_RDS : 0);
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mod->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS |
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V4L2_TUNER_CAP_LOW;
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return 0;
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}
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/* Set modulator attributes. If mode is not TX, set to TX. */
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static int fm_v4l2_vidioc_s_modulator(struct file *file, void *priv,
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struct v4l2_modulator *mod)
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{
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struct fmdev *fmdev = video_drvdata(file);
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u8 rds_mode;
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u16 aud_mode;
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int ret;
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if (mod->index != 0)
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return -EINVAL;
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if (fmdev->curr_fmmode != FM_MODE_TX) {
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ret = fmc_set_mode(fmdev, FM_MODE_TX);
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if (ret != 0) {
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fmerr("Failed to set TX mode\n");
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return ret;
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}
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}
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aud_mode = (mod->txsubchans & V4L2_TUNER_SUB_STEREO) ?
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FM_STEREO_MODE : FM_MONO_MODE;
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rds_mode = (mod->txsubchans & V4L2_TUNER_SUB_RDS) ?
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FM_RDS_ENABLE : FM_RDS_DISABLE;
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ret = fm_tx_set_stereo_mono(fmdev, aud_mode);
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if (ret < 0) {
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fmerr("Failed to set mono/stereo mode for TX\n");
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return ret;
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}
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ret = fm_tx_set_rds_mode(fmdev, rds_mode);
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if (ret < 0)
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fmerr("Failed to set rds mode for TX\n");
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|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct v4l2_file_operations fm_drv_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = fm_v4l2_fops_read,
|
||||
.write = fm_v4l2_fops_write,
|
||||
.poll = fm_v4l2_fops_poll,
|
||||
.unlocked_ioctl = video_ioctl2,
|
||||
.open = fm_v4l2_fops_open,
|
||||
.release = fm_v4l2_fops_release,
|
||||
};
|
||||
|
||||
static const struct v4l2_ctrl_ops fm_ctrl_ops = {
|
||||
.s_ctrl = fm_v4l2_s_ctrl,
|
||||
.g_volatile_ctrl = fm_g_volatile_ctrl,
|
||||
};
|
||||
static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = {
|
||||
.vidioc_querycap = fm_v4l2_vidioc_querycap,
|
||||
.vidioc_g_audio = fm_v4l2_vidioc_g_audio,
|
||||
.vidioc_s_audio = fm_v4l2_vidioc_s_audio,
|
||||
.vidioc_g_tuner = fm_v4l2_vidioc_g_tuner,
|
||||
.vidioc_s_tuner = fm_v4l2_vidioc_s_tuner,
|
||||
.vidioc_g_frequency = fm_v4l2_vidioc_g_freq,
|
||||
.vidioc_s_frequency = fm_v4l2_vidioc_s_freq,
|
||||
.vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek,
|
||||
.vidioc_g_modulator = fm_v4l2_vidioc_g_modulator,
|
||||
.vidioc_s_modulator = fm_v4l2_vidioc_s_modulator
|
||||
};
|
||||
|
||||
/* V4L2 RADIO device parent structure */
|
||||
static struct video_device fm_viddev_template = {
|
||||
.fops = &fm_drv_fops,
|
||||
.ioctl_ops = &fm_drv_ioctl_ops,
|
||||
.name = FM_DRV_NAME,
|
||||
.release = video_device_release,
|
||||
};
|
||||
|
||||
int fm_v4l2_init_video_device(struct fmdev *fmdev, int radio_nr)
|
||||
{
|
||||
struct v4l2_ctrl *ctrl;
|
||||
int ret;
|
||||
|
||||
/* Init mutex for core locking */
|
||||
mutex_init(&fmdev->mutex);
|
||||
|
||||
/* Allocate new video device */
|
||||
gradio_dev = video_device_alloc();
|
||||
if (NULL == gradio_dev) {
|
||||
fmerr("Can't allocate video device\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Setup FM driver's V4L2 properties */
|
||||
memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template));
|
||||
|
||||
video_set_drvdata(gradio_dev, fmdev);
|
||||
|
||||
gradio_dev->lock = &fmdev->mutex;
|
||||
|
||||
/* Register with V4L2 subsystem as RADIO device */
|
||||
if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) {
|
||||
video_device_release(gradio_dev);
|
||||
fmerr("Could not register video device\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
fmdev->radio_dev = gradio_dev;
|
||||
|
||||
/* Register to v4l2 ctrl handler framework */
|
||||
fmdev->radio_dev->ctrl_handler = &fmdev->ctrl_handler;
|
||||
|
||||
ret = v4l2_ctrl_handler_init(&fmdev->ctrl_handler, 5);
|
||||
if (ret < 0) {
|
||||
fmerr("(fmdev): Can't init ctrl handler\n");
|
||||
v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
/*
|
||||
* Following controls are handled by V4L2 control framework.
|
||||
* Added in ascending ID order.
|
||||
*/
|
||||
v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
|
||||
V4L2_CID_AUDIO_VOLUME, FM_RX_VOLUME_MIN,
|
||||
FM_RX_VOLUME_MAX, 1, FM_RX_VOLUME_MAX);
|
||||
|
||||
v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
|
||||
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
|
||||
|
||||
v4l2_ctrl_new_std_menu(&fmdev->ctrl_handler, &fm_ctrl_ops,
|
||||
V4L2_CID_TUNE_PREEMPHASIS, V4L2_PREEMPHASIS_75_uS,
|
||||
0, V4L2_PREEMPHASIS_75_uS);
|
||||
|
||||
v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
|
||||
V4L2_CID_TUNE_POWER_LEVEL, FM_PWR_LVL_LOW,
|
||||
FM_PWR_LVL_HIGH, 1, FM_PWR_LVL_HIGH);
|
||||
|
||||
ctrl = v4l2_ctrl_new_std(&fmdev->ctrl_handler, &fm_ctrl_ops,
|
||||
V4L2_CID_TUNE_ANTENNA_CAPACITOR, 0,
|
||||
255, 1, 255);
|
||||
|
||||
if (ctrl)
|
||||
ctrl->is_volatile = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void *fm_v4l2_deinit_video_device(void)
|
||||
{
|
||||
struct fmdev *fmdev;
|
||||
|
||||
|
||||
fmdev = video_get_drvdata(gradio_dev);
|
||||
|
||||
/* Unregister to v4l2 ctrl handler framework*/
|
||||
v4l2_ctrl_handler_free(&fmdev->ctrl_handler);
|
||||
|
||||
/* Unregister RADIO device from V4L2 subsystem */
|
||||
video_unregister_device(gradio_dev);
|
||||
|
||||
return fmdev;
|
||||
}
|
||||
33
drivers/media/radio/wl128x/fmdrv_v4l2.h
Normal file
33
drivers/media/radio/wl128x/fmdrv_v4l2.h
Normal file
@ -0,0 +1,33 @@
|
||||
/*
|
||||
* FM Driver for Connectivity chip of Texas Instruments.
|
||||
*
|
||||
* FM V4L2 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_V4L2_H
|
||||
#define _FMDRV_V4L2_H
|
||||
|
||||
#include <media/v4l2-ioctl.h>
|
||||
#include <media/v4l2-common.h>
|
||||
#include <media/v4l2-ctrls.h>
|
||||
|
||||
int fm_v4l2_init_video_device(struct fmdev *, int);
|
||||
void *fm_v4l2_deinit_video_device(void);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user