linux/drivers/media/usb/tlg2300/pd-radio.c

341 lines
8.6 KiB
C

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <media/v4l2-dev.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <linux/sched.h>
#include "pd-common.h"
#include "vendorcmds.h"
static int set_frequency(struct poseidon *p, __u32 frequency);
static int poseidon_fm_close(struct file *filp);
static int poseidon_fm_open(struct file *filp);
#define TUNER_FREQ_MIN_FM 76000000U
#define TUNER_FREQ_MAX_FM 108000000U
#define MAX_PREEMPHASIS (V4L2_PREEMPHASIS_75_uS + 1)
static int preemphasis[MAX_PREEMPHASIS] = {
TLG_TUNE_ASTD_NONE, /* V4L2_PREEMPHASIS_DISABLED */
TLG_TUNE_ASTD_FM_EUR, /* V4L2_PREEMPHASIS_50_uS */
TLG_TUNE_ASTD_FM_US, /* V4L2_PREEMPHASIS_75_uS */
};
static int poseidon_check_mode_radio(struct poseidon *p)
{
int ret;
u32 status;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ/2);
ret = usb_set_interface(p->udev, 0, BULK_ALTERNATE_IFACE);
if (ret < 0)
goto out;
ret = set_tuner_mode(p, TLG_MODE_FM_RADIO);
if (ret != 0)
goto out;
ret = send_set_req(p, SGNL_SRC_SEL, TLG_SIG_SRC_ANTENNA, &status);
ret = send_set_req(p, TUNER_AUD_ANA_STD,
p->radio_data.pre_emphasis, &status);
ret |= send_set_req(p, TUNER_AUD_MODE,
TLG_TUNE_TVAUDIO_MODE_STEREO, &status);
ret |= send_set_req(p, AUDIO_SAMPLE_RATE_SEL,
ATV_AUDIO_RATE_48K, &status);
ret |= send_set_req(p, TUNE_FREQ_SELECT, TUNER_FREQ_MIN_FM, &status);
out:
return ret;
}
#ifdef CONFIG_PM
static int pm_fm_suspend(struct poseidon *p)
{
logpm(p);
pm_alsa_suspend(p);
usb_set_interface(p->udev, 0, 0);
msleep(300);
return 0;
}
static int pm_fm_resume(struct poseidon *p)
{
logpm(p);
poseidon_check_mode_radio(p);
set_frequency(p, p->radio_data.fm_freq);
pm_alsa_resume(p);
return 0;
}
#endif
static int poseidon_fm_open(struct file *filp)
{
struct poseidon *p = video_drvdata(filp);
int ret = 0;
mutex_lock(&p->lock);
if (p->state & POSEIDON_STATE_DISCONNECT) {
ret = -ENODEV;
goto out;
}
if (p->state && !(p->state & POSEIDON_STATE_FM)) {
ret = -EBUSY;
goto out;
}
ret = v4l2_fh_open(filp);
if (ret)
goto out;
usb_autopm_get_interface(p->interface);
if (0 == p->state) {
struct video_device *vfd = &p->radio_data.fm_dev;
/* default pre-emphasis */
if (p->radio_data.pre_emphasis == 0)
p->radio_data.pre_emphasis = TLG_TUNE_ASTD_FM_EUR;
set_debug_mode(vfd, debug_mode);
ret = poseidon_check_mode_radio(p);
if (ret < 0) {
usb_autopm_put_interface(p->interface);
goto out;
}
p->state |= POSEIDON_STATE_FM;
}
kref_get(&p->kref);
out:
mutex_unlock(&p->lock);
return ret;
}
static int poseidon_fm_close(struct file *filp)
{
struct poseidon *p = video_drvdata(filp);
struct radio_data *fm = &p->radio_data;
uint32_t status;
mutex_lock(&p->lock);
if (v4l2_fh_is_singular_file(filp))
p->state &= ~POSEIDON_STATE_FM;
if (fm->is_radio_streaming && filp == p->file_for_stream) {
fm->is_radio_streaming = 0;
send_set_req(p, PLAY_SERVICE, TLG_TUNE_PLAY_SVC_STOP, &status);
}
usb_autopm_put_interface(p->interface);
mutex_unlock(&p->lock);
kref_put(&p->kref, poseidon_delete);
return v4l2_fh_release(filp);
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
struct poseidon *p = video_drvdata(file);
strlcpy(v->driver, "tele-radio", sizeof(v->driver));
strlcpy(v->card, "Telegent Poseidon", sizeof(v->card));
usb_make_path(p->udev, v->bus_info, sizeof(v->bus_info));
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
/* Report all capabilities of the USB device */
v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS |
V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VBI_CAPTURE |
V4L2_CAP_AUDIO | V4L2_CAP_STREAMING |
V4L2_CAP_READWRITE;
return 0;
}
static const struct v4l2_file_operations poseidon_fm_fops = {
.owner = THIS_MODULE,
.open = poseidon_fm_open,
.release = poseidon_fm_close,
.poll = v4l2_ctrl_poll,
.unlocked_ioctl = video_ioctl2,
};
static int tlg_fm_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *vt)
{
struct poseidon *p = video_drvdata(file);
struct tuner_fm_sig_stat_s fm_stat = {};
int ret, status, count = 5;
if (vt->index != 0)
return -EINVAL;
vt->type = V4L2_TUNER_RADIO;
vt->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
vt->rangelow = TUNER_FREQ_MIN_FM * 2 / 125;
vt->rangehigh = TUNER_FREQ_MAX_FM * 2 / 125;
vt->rxsubchans = V4L2_TUNER_SUB_STEREO;
vt->audmode = V4L2_TUNER_MODE_STEREO;
vt->signal = 0;
vt->afc = 0;
strlcpy(vt->name, "Radio", sizeof(vt->name));
mutex_lock(&p->lock);
ret = send_get_req(p, TUNER_STATUS, TLG_MODE_FM_RADIO,
&fm_stat, &status, sizeof(fm_stat));
while (fm_stat.sig_lock_busy && count-- && !ret) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
ret = send_get_req(p, TUNER_STATUS, TLG_MODE_FM_RADIO,
&fm_stat, &status, sizeof(fm_stat));
}
mutex_unlock(&p->lock);
if (ret || status) {
vt->signal = 0;
} else if ((fm_stat.sig_present || fm_stat.sig_locked)
&& fm_stat.sig_strength == 0) {
vt->signal = 0xffff;
} else
vt->signal = (fm_stat.sig_strength * 255 / 10) << 8;
return 0;
}
static int fm_get_freq(struct file *file, void *priv,
struct v4l2_frequency *argp)
{
struct poseidon *p = video_drvdata(file);
if (argp->tuner)
return -EINVAL;
argp->frequency = p->radio_data.fm_freq;
return 0;
}
static int set_frequency(struct poseidon *p, __u32 frequency)
{
__u32 freq ;
int ret, status;
mutex_lock(&p->lock);
ret = send_set_req(p, TUNER_AUD_ANA_STD,
p->radio_data.pre_emphasis, &status);
freq = (frequency * 125) / 2; /* Hz */
freq = clamp(freq, TUNER_FREQ_MIN_FM, TUNER_FREQ_MAX_FM);
ret = send_set_req(p, TUNE_FREQ_SELECT, freq, &status);
if (ret < 0)
goto error ;
ret = send_set_req(p, TAKE_REQUEST, 0, &status);
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ/4);
if (!p->radio_data.is_radio_streaming) {
ret = send_set_req(p, TAKE_REQUEST, 0, &status);
ret = send_set_req(p, PLAY_SERVICE,
TLG_TUNE_PLAY_SVC_START, &status);
p->radio_data.is_radio_streaming = 1;
}
p->radio_data.fm_freq = freq * 2 / 125;
error:
mutex_unlock(&p->lock);
return ret;
}
static int fm_set_freq(struct file *file, void *priv,
const struct v4l2_frequency *argp)
{
struct poseidon *p = video_drvdata(file);
if (argp->tuner)
return -EINVAL;
p->file_for_stream = file;
#ifdef CONFIG_PM
p->pm_suspend = pm_fm_suspend;
p->pm_resume = pm_fm_resume;
#endif
return set_frequency(p, argp->frequency);
}
static int tlg_fm_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct poseidon *p = container_of(ctrl->handler, struct poseidon,
radio_data.ctrl_handler);
int pre_emphasis;
u32 status;
switch (ctrl->id) {
case V4L2_CID_TUNE_PREEMPHASIS:
pre_emphasis = preemphasis[ctrl->val];
send_set_req(p, TUNER_AUD_ANA_STD, pre_emphasis, &status);
p->radio_data.pre_emphasis = pre_emphasis;
return 0;
}
return -EINVAL;
}
static int vidioc_s_tuner(struct file *file, void *priv, const struct v4l2_tuner *vt)
{
return vt->index > 0 ? -EINVAL : 0;
}
static const struct v4l2_ctrl_ops tlg_fm_ctrl_ops = {
.s_ctrl = tlg_fm_s_ctrl,
};
static const struct v4l2_ioctl_ops poseidon_fm_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_tuner = tlg_fm_vidioc_g_tuner,
.vidioc_g_frequency = fm_get_freq,
.vidioc_s_frequency = fm_set_freq,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static struct video_device poseidon_fm_template = {
.name = "Telegent-Radio",
.fops = &poseidon_fm_fops,
.minor = -1,
.release = video_device_release_empty,
.ioctl_ops = &poseidon_fm_ioctl_ops,
};
int poseidon_fm_init(struct poseidon *p)
{
struct video_device *vfd = &p->radio_data.fm_dev;
struct v4l2_ctrl_handler *hdl = &p->radio_data.ctrl_handler;
*vfd = poseidon_fm_template;
set_frequency(p, TUNER_FREQ_MIN_FM);
v4l2_ctrl_handler_init(hdl, 1);
v4l2_ctrl_new_std_menu(hdl, &tlg_fm_ctrl_ops, V4L2_CID_TUNE_PREEMPHASIS,
V4L2_PREEMPHASIS_75_uS, 0, V4L2_PREEMPHASIS_50_uS);
if (hdl->error) {
v4l2_ctrl_handler_free(hdl);
return hdl->error;
}
vfd->v4l2_dev = &p->v4l2_dev;
vfd->ctrl_handler = hdl;
set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
video_set_drvdata(vfd, p);
return video_register_device(vfd, VFL_TYPE_RADIO, -1);
}
int poseidon_fm_exit(struct poseidon *p)
{
video_unregister_device(&p->radio_data.fm_dev);
v4l2_ctrl_handler_free(&p->radio_data.ctrl_handler);
return 0;
}