1 files changed, 339 insertions, 0 deletions
diff --git a/drivers/staging/media/tlg2300/pd-radio.c b/drivers/staging/media/tlg2300/pd-radio.c
new file mode 100644
index 000000000000..b391194a840c
--- /dev/null
+++ b/drivers/staging/media/tlg2300/pd-radio.c
@@ -0,0 +1,339 @@
+#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;
+	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;
+}