From: Raja-Mani <x0102026@xxxxxx> This module interfaces V4L2 subsystem and FM common module. It registers itself with V4L2 as Radio module. Signed-off-by: Pramodh AG <pramodh_ag@xxxxxx> Signed-off-by: Raja-Mani <x0102026@xxxxxx> --- drivers/staging/ti-st/fmdrv_v4l2.c | 550 ++++++++++++++++++++++++++++++++++++ drivers/staging/ti-st/fmdrv_v4l2.h | 32 ++ 2 files changed, 582 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.c create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.h diff --git a/drivers/staging/ti-st/fmdrv_v4l2.c b/drivers/staging/ti-st/fmdrv_v4l2.c new file mode 100644 index 0000000..047bce5 --- /dev/null +++ b/drivers/staging/ti-st/fmdrv_v4l2.c @@ -0,0 +1,550 @@ +/* + * FM Driver for Connectivity chip of Texas Instruments. + * This file provides interfaces to V4L2 subsystem. + * + * This module registers with V4L2 subsystem as Radio + * data system interface (/dev/radio). During the registration, + * it will expose two set of function pointers to V4L2 subsystem. + * + * 1) File operation related API (open, close, read, write, poll...etc). + * 2) Set of V4L2 IOCTL complaint API. + * + * Copyright (C) 2010 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 "fmdrv.h" +#include "fmdrv_v4l2.h" +#include "fmdrv_common.h" +#include "fmdrv_rx.h" +/* TODO: Enable when FM TX is supported */ +/* #include "fmdrv_tx.h" */ + +static struct video_device *gradio_dev; +static unsigned char radio_disconnected; + +/* Query control */ +static struct v4l2_queryctrl fmdrv_v4l2_queryctrl[] = { + { + .id = V4L2_CID_AUDIO_VOLUME, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Volume", + .minimum = FM_RX_VOLUME_MIN, + .maximum = FM_RX_VOLUME_MAX, + .step = 1, + .default_value = FM_DEFAULT_RX_VOLUME, + }, + { + .id = V4L2_CID_AUDIO_BALANCE, + .flags = V4L2_CTRL_FLAG_DISABLED, + }, + { + .id = V4L2_CID_AUDIO_BASS, + .flags = V4L2_CTRL_FLAG_DISABLED, + }, + { + .id = V4L2_CID_AUDIO_TREBLE, + .flags = V4L2_CTRL_FLAG_DISABLED, + }, + { + .id = V4L2_CID_AUDIO_MUTE, + .type = V4L2_CTRL_TYPE_BOOLEAN, + .name = "Mute", + .minimum = 0, + .maximum = 2, + .step = 1, + .default_value = FM_MUTE_OFF, + }, + { + .id = V4L2_CID_AUDIO_LOUDNESS, + .flags = V4L2_CTRL_FLAG_DISABLED, + }, +}; + +/* -- V4L2 RADIO (/dev/radioX) device file operation interfaces --- */ +/* Read RX RDS data */ +static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf, + size_t count, loff_t *ppos) +{ + unsigned char rds_mode; + int ret; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + + if (!radio_disconnected) { + pr_err("(fmdrv): FM device is already disconnected\n"); + ret = -EIO; + goto exit; + } + + /* Turn on RDS mode , if it is disabled */ + ret = fm_rx_get_rds_mode(fmdev, &rds_mode); + if (ret < 0) { + pr_err("(fmdrv): Unable to read current rds mode"); + goto exit; + } + if (rds_mode == FM_RDS_DISABLE) { + ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE); + if (ret < 0) { + pr_err("(fmdrv): Failed to enable rds mode"); + goto exit; + } + } + /* Copy RDS data from internal buffer to user buffer */ + ret = fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count); + +exit: + return ret; +} + +/* Write RDS data. + * TODO: When FM TX support is added, use "V4L2_CID_RDS_TX_XXXX" codes, + * instead of write operation. + */ +static ssize_t fm_v4l2_fops_write(struct file *file, const char __user * buf, + size_t count, loff_t *ppos) +{ + struct tx_rds rds; + int ret; + struct fmdrv_ops *fmdev; + + ret = copy_from_user(&rds, buf, sizeof(rds)); + pr_info("(fmdrv): (%d)type: %d, text %s, af %d", + ret, rds.text_type, rds.text, rds.af_freq); + + fmdev = video_drvdata(file); + /* TODO: Enable when FM TX is supported */ + /* fm_tx_set_radio_text(fmdev, rds.text, rds.text_type); */ + /* fm_tx_set_af(fmdev, rds.af_freq); */ + + return 0; +} + +static unsigned int fm_v4l2_fops_poll(struct file *file, + struct poll_table_struct *pts) +{ + int ret; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + ret = fmc_is_rds_data_available(fmdev, file, pts); + if (!ret) + return POLLIN | POLLRDNORM; + return 0; +} + +/* Handle open request for "/dev/radioX" device. + * Start with FM RX mode as default. + */ +static int fm_v4l2_fops_open(struct file *file) +{ + int ret; + struct fmdrv_ops *fmdev = NULL; + + /* Don't allow multiple open */ + if (radio_disconnected) { + pr_err("(fmdrv): FM device is already opened\n"); + ret = -EBUSY; + goto exit; + } + + fmdev = video_drvdata(file); + ret = fmc_prepare(fmdev); + if (ret < 0) { + pr_err("(fmdrv): Unable to prepare FM CORE"); + goto exit; + } + + pr_info("(fmdrv): Load FM RX firmware.."); + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret < 0) { + pr_err("(fmdrv): Unable to load FM RX firmware"); + goto exit; + } + radio_disconnected = 1; + +exit: + return ret; +} + +static int fm_v4l2_fops_release(struct file *file) +{ + int ret = 0; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + if (!radio_disconnected) { + pr_info("(fmdrv):FM dev already closed, close called again?"); + goto exit; + } + ret = fmc_set_mode(fmdev, FM_MODE_OFF); + if (ret < 0) { + pr_err("(fmdrv): Unable to turn off the chip"); + goto exit; + } + ret = fmc_release(fmdev); + if (ret < 0) { + pr_err("(fmdrv): FM CORE release failed"); + goto exit; + } + radio_disconnected = 0; + +exit: + return ret; +} + +/* V4L2 RADIO (/dev/radioX) device IOCTL interfaces */ +static int fm_v4l2_vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *capability) +{ + strlcpy(capability->driver, FM_DRV_NAME, sizeof(capability->driver)); + strlcpy(capability->card, FM_DRV_CARD_SHORT_NAME, + sizeof(capability->card)); + sprintf(capability->bus_info, "UART"); + capability->version = FM_DRV_RADIO_VERSION; + capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER | + V4L2_CAP_RADIO | V4L2_CAP_MODULATOR | + V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | + V4L2_CAP_RDS_CAPTURE; + return 0; +} + +static int fm_v4l2_vidioc_queryctrl(struct file *file, void *priv, + struct v4l2_queryctrl *qc) +{ + int index; + int ret = -EINVAL; + + if (qc->id < V4L2_CID_BASE) + return ret; + + /* Search control ID and copy its properties */ + for (index = 0; index < NO_OF_ENTRIES_IN_ARRAY(fmdrv_v4l2_queryctrl);\ + index++) { + if (qc->id && qc->id == fmdrv_v4l2_queryctrl[index].id) { + memcpy(qc, &(fmdrv_v4l2_queryctrl[index]), sizeof(*qc)); + ret = 0; + break; + } + } + return ret; +} + +static int fm_v4l2_vidioc_g_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + int ret = -EINVAL; + unsigned short curr_vol; + unsigned char curr_mute_mode; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: /* get mute mode */ + ret = fm_rx_get_mute_mode(fmdev, &curr_mute_mode); + if (ret < 0) + goto exit; + ctrl->value = curr_mute_mode; + break; + case V4L2_CID_AUDIO_VOLUME: /* get volume */ + ret = fm_rx_get_volume(fmdev, &curr_vol); + if (ret < 0) + goto exit; + ctrl->value = curr_vol; + break; + } + +exit: + return ret; +} + +static int fm_v4l2_vidioc_s_ctrl(struct file *file, void *priv, + struct v4l2_control *ctrl) +{ + int ret = -EINVAL; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: /* set mute */ + ret = fmc_set_mute_mode(fmdev, (unsigned char)ctrl->value); + if (ret < 0) + goto exit; + break; + case V4L2_CID_AUDIO_VOLUME: /* set volume */ + ret = fm_rx_set_volume(fmdev, (unsigned short)ctrl->value); + if (ret < 0) + goto exit; + break; + } + +exit: + return ret; +} + +static int fm_v4l2_vidioc_g_audio(struct file *file, void *priv, + struct v4l2_audio *audio) +{ + memset(audio, 0, sizeof(*audio)); + audio->index = 0; + strcpy(audio->name, "Radio"); + audio->capability = V4L2_AUDCAP_STEREO; + + return 0; +} + +static int fm_v4l2_vidioc_s_audio(struct file *file, void *priv, + struct v4l2_audio *audio) +{ + if (audio->index != 0) + return -EINVAL; + return 0; +} + +/* Get tuner attributes. If current mode is NOT RX, set to RX */ +static int fm_v4l2_vidioc_g_tuner(struct file *file, void *priv, + struct v4l2_tuner *tuner) +{ + unsigned int bottom_frequency; + unsigned int top_frequency; + unsigned short stereo_mono_mode; + unsigned short rssilvl; + int ret = -EINVAL; + struct fmdrv_ops *fmdev; + + if (tuner->index != 0) + goto exit; + + fmdev = video_drvdata(file); + if (fmdev->curr_fmmode != FM_MODE_RX) { + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret < 0) { + pr_err("(fmdrv): Failed to set RX mode; unable to " \ + "read tuner attributes\n"); + goto exit; + } + } + + ret = fm_rx_get_currband_lowhigh_freq(fmdev, &bottom_frequency, + &top_frequency); + if (ret < 0) + goto exit; + + ret = fm_rx_get_stereo_mono(fmdev, &stereo_mono_mode); + if (ret < 0) + goto exit; + + ret = fm_rx_get_rssi_level(fmdev, &rssilvl); + if (ret < 0) + goto exit; + + strcpy(tuner->name, "FM"); + tuner->type = V4L2_TUNER_RADIO; + /* Store rangelow and rangehigh freq in unit of 62.5 KHz */ + tuner->rangelow = (bottom_frequency * 10000) / 625; + tuner->rangehigh = (top_frequency * 10000) / 625; + tuner->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO | + ((fmdev->rx.rds.flag == FM_RDS_ENABLE) ? V4L2_TUNER_SUB_RDS : 0); + tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS; + tuner->audmode = (stereo_mono_mode ? + V4L2_TUNER_MODE_MONO : V4L2_TUNER_MODE_STEREO); + + /* Actual rssi value lies in between -128 to +127. + * Convert this range from 0 to 255 by adding +128 + */ + rssilvl += 128; + + /* Return signal strength value should be within 0 to 65535. + * Find out correct signal radio by multiplying (65535/255) = 257 + */ + tuner->signal = rssilvl * 257; + tuner->afc = 0; + +exit: + return ret; +} + +/* Set tuner attributes. If current mode is NOT RX, set to RX. + * Currently, we set only audio mode (mono/stereo) and RDS state (on/off). + * Should we set other tuner attributes, too? + */ +static int fm_v4l2_vidioc_s_tuner(struct file *file, void *priv, + struct v4l2_tuner *tuner) +{ + unsigned short aud_mode; + unsigned char rds_mode; + int ret = -EINVAL; + struct fmdrv_ops *fmdev; + + if (tuner->index != 0) + goto exit; + + aud_mode = (tuner->audmode == V4L2_TUNER_MODE_STEREO) ? + FM_STEREO_MODE : FM_MONO_MODE; + rds_mode = (tuner->rxsubchans & V4L2_TUNER_SUB_RDS) ? + FM_RDS_ENABLE : FM_RDS_DISABLE; + + fmdev = video_drvdata(file); + if (fmdev->curr_fmmode != FM_MODE_RX) { + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret < 0) { + pr_err("(fmdrv): Failed to set RX mode; unable to" \ + "write tuner attributes\n"); + goto exit; + } + } + + ret = fmc_set_stereo_mono(fmdev, aud_mode); + if (ret < 0) + goto exit; + + ret = fmc_set_rds_mode(fmdev, rds_mode); + if (ret < 0) + goto exit; + +exit: + return ret; +} + +/* Get tuner or modulator radio frequency */ +static int fm_v4l2_vidioc_g_frequency(struct file *file, void *priv, + struct v4l2_frequency *freq) +{ + int ret; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + ret = fmc_get_frequency(fmdev, &freq->frequency); + if (ret < 0) + return ret; + return 0; +} + +/* Set tuner or modulator radio frequency */ +static int fm_v4l2_vidioc_s_frequency(struct file *file, void *priv, + struct v4l2_frequency *freq) +{ + int ret; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + ret = fmc_set_frequency(fmdev, freq->frequency); + if (ret < 0) + return ret; + return 0; +} + +/* Set hardware frequency seek. If current mode is NOT RX, set it RX. */ +static int fm_v4l2_vidioc_s_hw_freq_seek(struct file *file, void *priv, + struct v4l2_hw_freq_seek *seek) +{ + int ret; + struct fmdrv_ops *fmdev; + + fmdev = video_drvdata(file); + if (fmdev->curr_fmmode != FM_MODE_RX) { + ret = fmc_set_mode(fmdev, FM_MODE_RX); + if (ret != 0) { + pr_err("(fmdrv): Failed to set RX mode; unable to " \ + "start HW frequency seek\n"); + goto exit; + } + } + + ret = fm_rx_seek(fmdev, seek->seek_upward, seek->wrap_around); + if (ret < 0) + goto exit; + +exit: + 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, + .ioctl = video_ioctl2, + .open = fm_v4l2_fops_open, + .release = fm_v4l2_fops_release, +}; + +static const struct v4l2_ioctl_ops fm_drv_ioctl_ops = { + .vidioc_querycap = fm_v4l2_vidioc_querycap, + .vidioc_queryctrl = fm_v4l2_vidioc_queryctrl, + .vidioc_g_ctrl = fm_v4l2_vidioc_g_ctrl, + .vidioc_s_ctrl = fm_v4l2_vidioc_s_ctrl, + .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_frequency, + .vidioc_s_frequency = fm_v4l2_vidioc_s_frequency, + .vidioc_s_hw_freq_seek = fm_v4l2_vidioc_s_hw_freq_seek +}; + +/* 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 fmdrv_ops *fmdev, int radio_nr) +{ + int ret = -ENOMEM; + + gradio_dev = NULL; + /* Allocate new video device */ + gradio_dev = video_device_alloc(); + if (NULL == gradio_dev) { + pr_err("(fmdrv): Can't allocate video device"); + goto exit; + } + + /* Setup FM driver's V4L2 properties */ + memcpy(gradio_dev, &fm_viddev_template, sizeof(fm_viddev_template)); + + video_set_drvdata(gradio_dev, fmdev); + + /* Register with V4L2 subsystem as RADIO device */ + if (video_register_device(gradio_dev, VFL_TYPE_RADIO, radio_nr)) { + video_device_release(gradio_dev); + pr_err("(fmdrv): Could not register video device"); + goto exit; + } + + fmdev->radio_dev = gradio_dev; + ret = 0; + +exit: + return ret; +} + +void *fm_v4l2_deinit_video_device(void) +{ + struct fmdrv_ops *fmdev; + + fmdev = video_get_drvdata(gradio_dev); + /* Unregister RADIO device from V4L2 subsystem */ + video_unregister_device(gradio_dev); + + return fmdev; +} diff --git a/drivers/staging/ti-st/fmdrv_v4l2.h b/drivers/staging/ti-st/fmdrv_v4l2.h new file mode 100644 index 0000000..6f0a415 --- /dev/null +++ b/drivers/staging/ti-st/fmdrv_v4l2.h @@ -0,0 +1,32 @@ +/* + * FM Driver for Connectivity chip of Texas Instruments. + * + * FM V4L2 module header. + * + * Copyright (C) 2010 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-common.h> +#include <media/v4l2-ioctl.h> + +int fm_v4l2_init_video_device(struct fmdrv_ops *, int); +void *fm_v4l2_deinit_video_device(void); + +#endif -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html