V4L/DVB: Add driver for Telegent tlg2300

pd-common.h contains the common data structures, while
vendorcmds.h contains the vendor commands for firmware.

[mchehab@redhat.com: Folded the 10 patches with the driver]
Signed-off-by: NHuang Shijie <shijie8@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Documentation/video4linux/README.tlg2300

+tlg2300 release notes
+====================
+
+This is a v4l2/dvb device driver for the tlg2300 chip.
+
+
+current status
+==============
+
+video
+	- support mmap and read().(no overlay)
+
+audio
+	- The driver will register a ALSA card for the audio input.
+
+vbi
+	- Works for almost TV norms.
+
+dvb-t
+	- works for DVB-T
+
+FM
+	- Works for radio.
+
+---------------------------------------------------------------------------
+TESTED APPLICATIONS:
+
+-VLC1.0.4 test the video and dvb. The GUI is friendly to use.
+
+-Mplayer test the video.
+
+-Mplayer test the FM. The mplayer should be compiled with --enable-radio and
+	 --enable-radio-capture.
+	The command runs as this(The alsa audio registers to card 1):
+	#mplayer radio://103.7/capture/ -radio adevice=hw=1,0:arate=48000 \
+		-rawaudio rate=48000:channels=2
+
+---------------------------------------------------------------------------
+KNOWN PROBLEMS:
+
+country code
+	- The firmware of the chip needs the country code to determine
+	the stardards of video and audio when it runs for analog TV or radio.
+	The DVB-T does not need the country code.
+
+	So you must set the country-code correctly. The V4L2 does not have
+	the interface,the driver has to provide a parameter `country_code'.
+
+	You could set the coutry code in two ways, take USA as example
+	(The USA's country code is 1):
+
+	[1] add the following line in /etc/modprobe.conf before you insert the
+	    card into USB hub's port :
+		poseidon country_code=1
+
+	[2] You can also modify the parameter at runtime (before you run the
+	    application such as VLC)
+		#echo 1 > /sys/module/poseidon/parameter/country_code
+
+	The known country codes show below:
+	country code :  country
+	93 		"Afghanistan"
+	355	 	"Albania"
+	213	 	"Algeria"
+	684	 	"American Samoa"
+	376	 	"Andorra"
+	244	 	"Angola"
+	54 		"Argentina"
+	374	 	"Armenia"
+	61 		"Australia"
+	43 		"Austria"
+	994	 	"Azerbaijan"
+	973	 	"Bahrain"
+	880	 	"Bangladesh"
+	375	 	"Belarus"
+	32 		"Belgium"
+	501	 	"Belize"
+	229	 	"Benin"
+	591	 	"Bolivia"
+	387	 	"Bosnia and Herzegovina"
+	267	 	"Botswana"
+	55 		"Brazil"
+	673	 	"Brunei Darussalam"
+	359	 	"Bulgalia"
+	226	 	"Burkina Faso"
+	257	 	"Burundi"
+	237	 	"Cameroon"
+	1		"Canada"
+	236	 	"Central African Republic"
+	235	 	"Chad"
+	56 		"Chile"
+	86 		"China"
+	57 		"Colombia"
+	242	 	"Congo"
+	243	 	"Congo, Dem. Rep. of "
+	506	 	"Costa Rica"
+	385	 	"Croatia"
+	53 		"Cuba or Guantanamo Bay"
+	357	 	"Cyprus"
+	420	 	"Czech Republic"
+	45 		"Denmark"
+	246	 	"Diego Garcia"
+	253	 	"Djibouti"
+	593	 	"Ecuador"
+	20 		"Egypt"
+	503	 	"El Salvador"
+	240	 	"Equatorial Guinea"
+	372	 	"Estonia"
+	251	 	"Ethiopia"
+	358	 	"Finland"
+	33 		"France"
+	594	 	"French Guiana"
+	689	 	"French Polynesia"
+	241	 	"Gabonese Republic"
+	220	 	"Gambia"
+	995	 	"Georgia"
+	49 		"Germany"
+	233	 	"Ghana"
+	350	 	"Gibraltar"
+	30 		"Greece"
+	299	 	"Greenland"
+	671	 	"Guam"
+	502		"Guatemala"
+	592	 	"Guyana"
+	509	 	"Haiti"
+	504	 	"Honduras"
+	852	 	"Hong Kong SAR, China"
+	36 		"Hungary"
+	354	 	"Iceland"
+	91 		"India"
+	98 		"Iran"
+	964	 	"Iraq"
+	353	 	"Ireland"
+	972	 	"Israel"
+	39 		"Italy or Vatican City"
+	225	 	"Ivory Coast"
+	81 		"Japan"
+	962	 	"Jordan"
+	7		"Kazakhstan or Kyrgyzstan"
+	254	 	"Kenya"
+	686	 	"Kiribati"
+	965	 	"Kuwait"
+	856	 	"Laos"
+	371	 	"Latvia"
+	961	 	"Lebanon"
+	266	 	"Lesotho"
+	231	 	"Liberia"
+	218	 	"Libya"
+	41 		"Liechtenstein or Switzerland"
+	370	 	"Lithuania"
+	352	 	"Luxembourg"
+	853	 	"Macau SAR, China"
+	261	 	"Madagascar"
+	60 		"Malaysia"
+	960	 	"Maldives"
+	223	 	"Mali Republic"
+	356	 	"Malta"
+	692	 	"Marshall Islands"
+	596	 	"Martinique"
+	222	 	"Mauritania"
+	230	 	"Mauritus"
+	52 		"Mexico"
+	691	 	"Micronesia"
+	373	 	"Moldova"
+	377	 	"Monaco"
+	976	 	"Mongolia"
+	212	 	"Morocco"
+	258	 	"Mozambique"
+	95 		"Myanmar"
+	264	 	"Namibia"
+	674	 	"Nauru"
+	31 		"Netherlands"
+	687	 	"New Caledonia"
+	64 		"New Zealand"
+	505	 	"Nicaragua"
+	227	 	"Niger"
+	234	 	"Nigeria"
+	850	 	"North Korea"
+	47 		"Norway"
+	968	 	"Oman"
+	92 		"Pakistan"
+	680	 	"Palau"
+	507	 	"Panama"
+	675	 	"Papua New Guinea"
+	595	 	"Paraguay"
+	51 		"Peru"
+	63 		"Philippines"
+	48 		"Poland"
+	351	 	"Portugal"
+	974	 	"Qatar"
+	262	 	"Reunion Island"
+	40 		"Romania"
+	7		"Russia"
+	378	 	"San Marino"
+	239	 	"Sao Tome and Principe"
+	966	 	"Saudi Arabia"
+	221	 	"Senegal"
+	248	 	"Seychelles Republic"
+	232	 	"Sierra Leone"
+	65 		"Singapore"
+	421	 	"Slovak Republic"
+	386	 	"Slovenia"
+	27 		"South Africa"
+	82 		"South Korea "
+	34 		"Spain"
+	94 		"Sri Lanka"
+	508	 	"St. Pierre and Miquelon"
+	249	 	"Sudan"
+	597	 	"Suriname"
+	268	 	"Swaziland"
+	46 		"Sweden"
+	963	 	"Syria"
+	886	 	"Taiwan Region"
+	255	 	"Tanzania"
+	66 		"Thailand"
+	228	 	"Togolese Republic"
+	216	 	"Tunisia"
+	90 		"Turkey"
+	993	 	"Turkmenistan"
+	256	 	"Uganda"
+	380	 	"Ukraine"
+	971	 	"United Arab Emirates"
+	44 		"United Kingdom"
+	1		"United States of America"
+	598	 	"Uruguay"
+	58 		"Venezuela"
+	84 		"Vietnam"
+	967	 	"Yemen"
+	260	 	"Zambia"
+	255	 	"Zanzibar"
+	263	 	"Zimbabwe"

MAINTAINERS

@@ -4676,6 +4676,14 @@ F:	drivers/media/common/saa7146*
 F:	drivers/media/video/*7146*
 F:	include/media/*7146*
 
+TLG2300 VIDEO4LINUX-2 DRIVER
+M 	Huang Shijie	<shijie8@gmail.com>
+M 	Kang Yong	<kangyong@telegent.com>
+M 	Zhang Xiaobing	<xbzhang@telegent.com>
+S:	Supported
+F:	drivers/media/video/tlg2300
+
+
 SC1200 WDT DRIVER
 M:	Zwane Mwaikambo <zwane@arm.linux.org.uk>
 S:	Maintained

drivers/media/video/Kconfig

@@ -949,6 +949,8 @@ source "drivers/media/video/hdpvr/Kconfig"
 
 source "drivers/media/video/em28xx/Kconfig"
 
+source "drivers/media/video/tlg2300/Kconfig"
+
 source "drivers/media/video/cx231xx/Kconfig"
 
 source "drivers/media/video/usbvision/Kconfig"

drivers/media/video/Makefile

@@ -99,6 +99,7 @@ obj-$(CONFIG_VIDEO_MEYE) += meye.o
 obj-$(CONFIG_VIDEO_SAA7134) += saa7134/
 obj-$(CONFIG_VIDEO_CX88) += cx88/
 obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
+obj-$(CONFIG_VIDEO_TLG2300) += tlg2300/
 obj-$(CONFIG_VIDEO_CX231XX) += cx231xx/
 obj-$(CONFIG_VIDEO_USBVISION) += usbvision/
 obj-$(CONFIG_VIDEO_PVRUSB2) += pvrusb2/

drivers/media/video/tlg2300/Kconfig

+config VIDEO_TLG2300
+	tristate "Telegent TLG2300 USB video capture support"
+	depends on VIDEO_DEV && I2C && INPUT && SND && DVB_CORE
+	select VIDEO_TUNER
+	select VIDEO_TVEEPROM
+	select VIDEO_IR
+	select VIDEOBUF_VMALLOC
+	select SND_PCM
+	select VIDEOBUF_DVB
+
+	---help---
+	  This is a video4linux driver for Telegent tlg2300 based TV cards.
+	  The driver supports V4L2, DVB-T and radio.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called poseidon

drivers/media/video/tlg2300/Makefile

+poseidon-objs := pd-video.o pd-alsa.o pd-dvb.o pd-radio.o pd-main.o
+
+obj-$(CONFIG_VIDEO_TLG2300) += poseidon.o
+
+EXTRA_CFLAGS += -Idrivers/media/video
+EXTRA_CFLAGS += -Idrivers/media/common/tuners
+EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
+EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
+

drivers/media/video/tlg2300/pd-alsa.c

+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/init.h>
+#include <linux/sound.h>
+#include <linux/spinlock.h>
+#include <linux/soundcard.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/proc_fs.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/info.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <media/v4l2-common.h>
+#include "pd-common.h"
+#include "vendorcmds.h"
+
+static void complete_handler_audio(struct urb *urb);
+#define AUDIO_EP	(0x83)
+#define AUDIO_BUF_SIZE	(512)
+#define PERIOD_SIZE	(1024 * 8)
+#define PERIOD_MIN	(4)
+#define PERIOD_MAX 	PERIOD_MIN
+
+static struct snd_pcm_hardware snd_pd_hw_capture = {
+	.info = SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		SNDRV_PCM_INFO_MMAP           |
+		SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_MMAP_VALID,
+
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rates = SNDRV_PCM_RATE_48000,
+
+	.rate_min = 48000,
+	.rate_max = 48000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = PERIOD_SIZE * PERIOD_MIN,
+	.period_bytes_min = PERIOD_SIZE,
+	.period_bytes_max = PERIOD_SIZE,
+	.periods_min = PERIOD_MIN,
+	.periods_max = PERIOD_MAX,
+	/*
+	.buffer_bytes_max = 62720 * 8,
+	.period_bytes_min = 64,
+	.period_bytes_max = 12544,
+	.periods_min = 2,
+	.periods_max = 98
+	*/
+};
+
+static int snd_pd_capture_open(struct snd_pcm_substream *substream)
+{
+	struct poseidon *p = snd_pcm_substream_chip(substream);
+	struct poseidon_audio *pa = &p->audio;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	if (!p)
+		return -ENODEV;
+	pa->users++;
+	pa->card_close 		= 0;
+	pa->capture_pcm_substream	= substream;
+	runtime->private_data		= p;
+
+	runtime->hw = snd_pd_hw_capture;
+	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+	usb_autopm_get_interface(p->interface);
+	kref_get(&p->kref);
+	return 0;
+}
+
+static int snd_pd_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct poseidon *p = snd_pcm_substream_chip(substream);
+	struct poseidon_audio *pa = &p->audio;
+
+	pa->users--;
+	pa->card_close 		= 1;
+	usb_autopm_put_interface(p->interface);
+	kref_put(&p->kref, poseidon_delete);
+	return 0;
+}
+
+static int snd_pd_hw_capture_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	unsigned int size;
+
+	size = params_buffer_bytes(hw_params);
+	if (runtime->dma_area) {
+		if (runtime->dma_bytes > size)
+			return 0;
+		vfree(runtime->dma_area);
+	}
+	runtime->dma_area = vmalloc(size);
+	if (!runtime->dma_area)
+		return -ENOMEM;
+	else
+		runtime->dma_bytes = size;
+	return 0;
+}
+
+static int audio_buf_free(struct poseidon *p)
+{
+	struct poseidon_audio *pa = &p->audio;
+	int i;
+
+	for (i = 0; i < AUDIO_BUFS; i++)
+		if (pa->urb_array[i])
+			usb_kill_urb(pa->urb_array[i]);
+	free_all_urb_generic(pa->urb_array, AUDIO_BUFS);
+	logpm();
+	return 0;
+}
+
+static int snd_pd_hw_capture_free(struct snd_pcm_substream *substream)
+{
+	struct poseidon *p = snd_pcm_substream_chip(substream);
+
+	logpm();
+	audio_buf_free(p);
+	return 0;
+}
+
+static int snd_pd_prepare(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+#define AUDIO_TRAILER_SIZE	(16)
+static inline void handle_audio_data(struct urb *urb, int *period_elapsed)
+{
+	struct poseidon_audio *pa = urb->context;
+	struct snd_pcm_runtime *runtime = pa->capture_pcm_substream->runtime;
+
+	int stride	= runtime->frame_bits >> 3;
+	int len		= urb->actual_length / stride;
+	unsigned char *cp	= urb->transfer_buffer;
+	unsigned int oldptr	= pa->rcv_position;
+
+	if (urb->actual_length == AUDIO_BUF_SIZE - 4)
+		len -= (AUDIO_TRAILER_SIZE / stride);
+
+	/* do the copy */
+	if (oldptr + len >= runtime->buffer_size) {
+		unsigned int cnt = runtime->buffer_size - oldptr;
+
+		memcpy(runtime->dma_area + oldptr * stride, cp, cnt * stride);
+		memcpy(runtime->dma_area, (cp + cnt * stride),
+					(len * stride - cnt * stride));
+	} else
+		memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
+
+	/* update the statas */
+	snd_pcm_stream_lock(pa->capture_pcm_substream);
+	pa->rcv_position	+= len;
+	if (pa->rcv_position >= runtime->buffer_size)
+		pa->rcv_position -= runtime->buffer_size;
+
+	pa->copied_position += (len);
+	if (pa->copied_position >= runtime->period_size) {
+		pa->copied_position -= runtime->period_size;
+		*period_elapsed = 1;
+	}
+	snd_pcm_stream_unlock(pa->capture_pcm_substream);
+}
+
+static void complete_handler_audio(struct urb *urb)
+{
+	struct poseidon_audio *pa = urb->context;
+	struct snd_pcm_substream *substream = pa->capture_pcm_substream;
+	int    period_elapsed = 0;
+	int    ret;
+
+	if (1 == pa->card_close || pa->capture_stream != STREAM_ON)
+		return;
+
+	if (urb->status != 0) {
+		/*if (urb->status == -ESHUTDOWN)*/
+			return;
+	}
+
+	if (substream) {
+		if (urb->actual_length) {
+			handle_audio_data(urb, &period_elapsed);
+			if (period_elapsed)
+				snd_pcm_period_elapsed(substream);
+		}
+	}
+
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret < 0)
+		log("audio urb failed (errcod = %i)", ret);
+	return;
+}
+
+static int fire_audio_urb(struct poseidon *p)
+{
+	int i, ret = 0;
+	struct poseidon_audio *pa = &p->audio;
+
+	alloc_bulk_urbs_generic(pa->urb_array, AUDIO_BUFS,
+			p->udev, AUDIO_EP,
+			AUDIO_BUF_SIZE, GFP_ATOMIC,
+			complete_handler_audio, pa);
+
+	for (i = 0; i < AUDIO_BUFS; i++) {
+		ret = usb_submit_urb(pa->urb_array[i], GFP_KERNEL);
+		if (ret)
+			log("urb err : %d", ret);
+	}
+	log();
+	return ret;
+}
+
+static int snd_pd_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct poseidon *p = snd_pcm_substream_chip(substream);
+	struct poseidon_audio *pa = &p->audio;
+
+	if (debug_mode)
+		log("cmd %d, audio stat : %d\n", cmd, pa->capture_stream);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_START:
+		if (pa->capture_stream == STREAM_ON)
+			return 0;
+
+		pa->rcv_position = pa->copied_position = 0;
+		pa->capture_stream = STREAM_ON;
+
+		if (in_hibernation(p))
+			return 0;
+		fire_audio_urb(p);
+		return 0;
+
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		pa->capture_stream = STREAM_SUSPEND;
+		return 0;
+	case SNDRV_PCM_TRIGGER_STOP:
+		pa->capture_stream = STREAM_OFF;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+static snd_pcm_uframes_t
+snd_pd_capture_pointer(struct snd_pcm_substream *substream)
+{
+	struct poseidon *p = snd_pcm_substream_chip(substream);
+	struct poseidon_audio *pa = &p->audio;
+	return pa->rcv_position;
+}
+
+static struct page *snd_pcm_pd_get_page(struct snd_pcm_substream *subs,
+					     unsigned long offset)
+{
+	void *pageptr = subs->runtime->dma_area + offset;
+	return vmalloc_to_page(pageptr);
+}
+
+static struct snd_pcm_ops pcm_capture_ops = {
+	.open      = snd_pd_capture_open,
+	.close     = snd_pd_pcm_close,
+	.ioctl     = snd_pcm_lib_ioctl,
+	.hw_params = snd_pd_hw_capture_params,
+	.hw_free   = snd_pd_hw_capture_free,
+	.prepare   = snd_pd_prepare,
+	.trigger   = snd_pd_capture_trigger,
+	.pointer   = snd_pd_capture_pointer,
+	.page      = snd_pcm_pd_get_page,
+};
+
+#ifdef CONFIG_PM
+int pm_alsa_suspend(struct poseidon *p)
+{
+	logpm(p);
+	audio_buf_free(p);
+	return 0;
+}
+
+int pm_alsa_resume(struct poseidon *p)
+{
+	logpm(p);
+	fire_audio_urb(p);
+	return 0;
+}
+#endif
+
+int poseidon_audio_init(struct poseidon *p)
+{
+	struct poseidon_audio *pa = &p->audio;
+	struct snd_card *card;
+	struct snd_pcm *pcm;
+	int ret;
+
+	ret = snd_card_create(-1, "Telegent", THIS_MODULE, 0, &card);
+	if (ret != 0)
+		return ret;
+
+	ret = snd_pcm_new(card, "poseidon audio", 0, 0, 1, &pcm);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
+	pcm->info_flags   = 0;
+	pcm->private_data = p;
+	strcpy(pcm->name, "poseidon audio capture");
+
+	strcpy(card->driver, "ALSA driver");
+	strcpy(card->shortname, "poseidon Audio");
+	strcpy(card->longname, "poseidon ALSA Audio");
+
+	if (snd_card_register(card)) {
+		snd_card_free(card);
+		return -ENOMEM;
+	}
+	pa->card = card;
+	return 0;
+}
+
+int poseidon_audio_free(struct poseidon *p)
+{
+	struct poseidon_audio *pa = &p->audio;
+
+	if (pa->card)
+		snd_card_free(pa->card);
+	return 0;
+}

drivers/media/video/tlg2300/pd-common.h

+#ifndef PD_COMMON_H
+#define PD_COMMON_H
+
+#include <linux/version.h>
+#include <linux/fs.h>
+#include <linux/wait.h>
+#include <linux/list.h>
+#include <linux/videodev2.h>
+#include <linux/semaphore.h>
+#include <linux/usb.h>
+#include <linux/poll.h>
+#include <media/videobuf-vmalloc.h>
+#include <media/v4l2-device.h>
+
+#include "dvb_frontend.h"
+#include "dvbdev.h"
+#include "dvb_demux.h"
+#include "dmxdev.h"
+
+#define SBUF_NUM	8
+#define MAX_BUFFER_NUM	6
+#define PK_PER_URB	32
+#define ISO_PKT_SIZE	3072
+
+#define POSEIDON_STATE_NONE		(0x0000)
+#define POSEIDON_STATE_ANALOG		(0x0001)
+#define POSEIDON_STATE_FM		(0x0002)
+#define POSEIDON_STATE_DVBT		(0x0004)
+#define POSEIDON_STATE_VBI		(0x0008)
+#define POSEIDON_STATE_DISCONNECT	(0x0080)
+
+#define PM_SUSPEND_DELAY	3
+
+#define V4L_PAL_VBI_LINES	18
+#define V4L_NTSC_VBI_LINES	12
+#define V4L_PAL_VBI_FRAMESIZE	(V4L_PAL_VBI_LINES * 1440 * 2)
+#define V4L_NTSC_VBI_FRAMESIZE	(V4L_NTSC_VBI_LINES * 1440 * 2)
+
+#define TUNER_FREQ_MIN		(45000000)
+#define TUNER_FREQ_MAX		(862000000)
+
+struct vbi_data {
+	struct video_device	*v_dev;
+	struct video_data	*video;
+	struct front_face	*front;
+
+	unsigned int		copied;
+	unsigned int		vbi_size; /* the whole size of two fields */
+	int 			users;
+};
+
+/*
+ * This is the running context of the video, it is useful for
+ * resume()
+ */
+struct running_context {
+	u32		freq;		/* VIDIOC_S_FREQUENCY */
+	int		audio_idx;	/* VIDIOC_S_TUNER    */
+	v4l2_std_id	tvnormid;	/* VIDIOC_S_STD     */
+	int		sig_index;	/* VIDIOC_S_INPUT  */
+	struct v4l2_pix_format pix;	/* VIDIOC_S_FMT   */
+};
+
+struct video_data {
+	/* v4l2 video device */
+	struct video_device	*v_dev;
+
+	/* the working context */
+	struct running_context	context;
+
+	/* for data copy */
+	int		field_count;
+
+	char		*dst;
+	int		lines_copied;
+	int		prev_left;
+
+	int		lines_per_field;
+	int		lines_size;
+
+	/* for communication */
+	u8			endpoint_addr;
+	struct urb 		*urb_array[SBUF_NUM];
+	struct vbi_data		*vbi;
+	struct poseidon 	*pd;
+	struct front_face	*front;
+
+	int			is_streaming;
+	int			users;
+
+	/* for bubble handler */
+	struct work_struct	bubble_work;
+};
+
+enum pcm_stream_state {
+	STREAM_OFF,
+	STREAM_ON,
+	STREAM_SUSPEND,
+};
+
+#define AUDIO_BUFS (3)
+#define CAPTURE_STREAM_EN 1
+struct poseidon_audio {
+	struct urb		*urb_array[AUDIO_BUFS];
+	unsigned int 		copied_position;
+	struct snd_pcm_substream   *capture_pcm_substream;
+
+	unsigned int 		rcv_position;
+	struct	snd_card	*card;
+	int 			card_close;
+
+	int 			users;
+	int			pm_state;
+	enum pcm_stream_state 	capture_stream;
+};
+
+struct radio_data {
+	__u32		fm_freq;
+	int		users;
+	unsigned int	is_radio_streaming;
+	struct video_device *fm_dev;
+};
+
+#define DVB_SBUF_NUM		4
+#define DVB_URB_BUF_SIZE	0x2000
+struct pd_dvb_adapter {
+	struct dvb_adapter	dvb_adap;
+	struct dvb_frontend	dvb_fe;
+	struct dmxdev		dmxdev;
+	struct dvb_demux	demux;
+
+	atomic_t		users;
+	atomic_t		active_feed;
+
+	/* data transfer */
+	s32			is_streaming;
+	struct urb		*urb_array[DVB_SBUF_NUM];
+	struct poseidon		*pd_device;
+	u8			ep_addr;
+	u8			reserved[3];
+
+	/* data for power resume*/
+	struct dvb_frontend_parameters fe_param;
+
+	/* for channel scanning */
+	int		prev_freq;
+	int		bandwidth;
+	unsigned long	last_jiffies;
+};
+
+struct front_face {
+	/* use this field to distinguish VIDEO and VBI */
+	enum v4l2_buf_type	type;
+
+	/* for host */
+	struct videobuf_queue	q;
+
+	/* the bridge for host and device */
+	struct videobuf_buffer	*curr_frame;
+
+	/* for device */
+	spinlock_t		queue_lock;
+	struct list_head	active;
+	struct poseidon		*pd;
+};
+
+struct poseidon {
+	struct list_head	device_list;
+
+	struct mutex		lock;
+	struct kref		kref;
+
+	/* for V4L2 */
+	struct v4l2_device	v4l2_dev;
+
+	/* hardware info */
+	struct usb_device	*udev;
+	struct usb_interface	*interface;
+	int 			cur_transfer_mode;
+
+	struct video_data	video_data;	/* video */
+	struct vbi_data		vbi_data;	/* vbi	 */
+	struct poseidon_audio	audio;		/* audio (alsa) */
+	struct radio_data	radio_data;	/* FM	 */
+	struct pd_dvb_adapter	dvb_data;	/* DVB	 */
+
+	u32			state;
+	int			country_code;
+	struct file		*file_for_stream; /* the active stream*/
+
+#ifdef CONFIG_PM
+	int (*pm_suspend)(struct poseidon *);
+	int (*pm_resume)(struct poseidon *);
+	pm_message_t		msg;
+
+	struct work_struct	pm_work;
+	u8			portnum;
+#endif
+};
+
+struct poseidon_format {
+	char 	*name;
+	int	fourcc;		 /* video4linux 2	  */
+	int	depth;		 /* bit/pixel		  */
+	int	flags;
+};
+
+struct poseidon_tvnorm {
+	v4l2_std_id	v4l2_id;
+	char		name[12];
+	u32		tlg_tvnorm;
+};
+
+/* video */
+int pd_video_init(struct poseidon *);
+void pd_video_exit(struct poseidon *);
+int stop_all_video_stream(struct poseidon *);
+
+/* alsa audio */
+int poseidon_audio_init(struct poseidon *);
+int poseidon_audio_free(struct poseidon *);
+#ifdef CONFIG_PM
+int pm_alsa_suspend(struct poseidon *);
+int pm_alsa_resume(struct poseidon *);
+#endif
+
+/* dvb */
+int pd_dvb_usb_device_init(struct poseidon *);
+void pd_dvb_usb_device_exit(struct poseidon *);
+void pd_dvb_usb_device_cleanup(struct poseidon *);
+int pd_dvb_get_adapter_num(struct pd_dvb_adapter *);
+void dvb_stop_streaming(struct pd_dvb_adapter *);
+
+/* FM */
+int poseidon_fm_init(struct poseidon *);
+int poseidon_fm_exit(struct poseidon *);
+struct video_device *vdev_init(struct poseidon *, struct video_device *);
+
+/* vendor command ops */
+int send_set_req(struct poseidon*, u8, s32, s32*);
+int send_get_req(struct poseidon*, u8, s32, void*, s32*, s32);
+s32 set_tuner_mode(struct poseidon*, unsigned char);
+enum tlg__analog_audio_standard get_audio_std(s32, s32);
+
+/* bulk urb alloc/free */
+int alloc_bulk_urbs_generic(struct urb **urb_array, int num,
+			struct usb_device *udev, u8 ep_addr,
+			int buf_size, gfp_t gfp_flags,
+			usb_complete_t complete_fn, void *context);
+void free_all_urb_generic(struct urb **urb_array, int num);
+
+/* misc */
+void poseidon_delete(struct kref *kref);
+void destroy_video_device(struct video_device **v_dev);
+extern int country_code;
+extern int debug_mode;
+void set_debug_mode(struct video_device *vfd, int debug_mode);
+
+#define in_hibernation(pd) (pd->msg.event == PM_EVENT_FREEZE)
+#define get_pm_count(p) (atomic_read(&(p)->interface->pm_usage_cnt))
+
+#define log(a, ...) printk(KERN_DEBUG "\t[ %s : %.3d ] "a"\n", \
+				__func__, __LINE__,  ## __VA_ARGS__)
+
+/* for power management */
+#define logpm(pd) do {\
+			if (debug_mode & 0x10)\
+				log();\
+		} while (0)
+
+#define logs(f) do { \
+			if ((debug_mode & 0x4) && \
+				(f)->type == V4L2_BUF_TYPE_VBI_CAPTURE) \
+					log("type : VBI");\
+								\
+			if ((debug_mode & 0x8) && \
+				(f)->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) \
+					log("type : VIDEO");\
+		} while (0)
+#endif

drivers/media/video/tlg2300/pd-dvb.c

+#include "pd-common.h"
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/dvb/dmx.h>
+#include <linux/delay.h>
+
+#include "vendorcmds.h"
+#include <linux/sched.h>
+#include <asm/atomic.h>
+
+static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb);
+
+static int dvb_bandwidth[][2] = {
+	{ TLG_BW_8, BANDWIDTH_8_MHZ },
+	{ TLG_BW_7, BANDWIDTH_7_MHZ },
+	{ TLG_BW_6, BANDWIDTH_6_MHZ }
+};
+static int dvb_bandwidth_length = ARRAY_SIZE(dvb_bandwidth);
+
+static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb);
+static int poseidon_check_mode_dvbt(struct poseidon *pd)
+{
+	s32 ret = 0, cmd_status = 0;
+
+	set_current_state(TASK_INTERRUPTIBLE);
+	schedule_timeout(HZ/4);
+
+	ret = usb_set_interface(pd->udev, 0, BULK_ALTERNATE_IFACE);
+	if (ret != 0)
+		return ret;
+
+	ret = set_tuner_mode(pd, TLG_MODE_CAPS_DVB_T);
+	if (ret)
+		return ret;
+
+	/* signal source */
+	ret = send_set_req(pd, SGNL_SRC_SEL, TLG_SIG_SRC_ANTENNA, &cmd_status);
+	if (ret|cmd_status)
+		return ret;
+
+	return 0;
+}
+
+/* acquire :
+ * 	1 == open
+ * 	0 == release
+ */
+static int poseidon_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	struct pd_dvb_adapter *pd_dvb;
+	int ret = 0;
+
+	if (!pd)
+		return -ENODEV;
+
+	pd_dvb = container_of(fe, struct pd_dvb_adapter, dvb_fe);
+	if (acquire) {
+		mutex_lock(&pd->lock);
+		if (pd->state & POSEIDON_STATE_DISCONNECT) {
+			ret = -ENODEV;
+			goto open_out;
+		}
+
+		if (pd->state && !(pd->state & POSEIDON_STATE_DVBT)) {
+			ret = -EBUSY;
+			goto open_out;
+		}
+
+		usb_autopm_get_interface(pd->interface);
+		if (0 == pd->state) {
+			ret = poseidon_check_mode_dvbt(pd);
+			if (ret < 0) {
+				usb_autopm_put_interface(pd->interface);
+				goto open_out;
+			}
+			pd->state |= POSEIDON_STATE_DVBT;
+			pd_dvb->bandwidth = 0;
+			pd_dvb->prev_freq = 0;
+		}
+		atomic_inc(&pd_dvb->users);
+		kref_get(&pd->kref);
+open_out:
+		mutex_unlock(&pd->lock);
+	} else {
+		dvb_stop_streaming(pd_dvb);
+
+		if (atomic_dec_and_test(&pd_dvb->users)) {
+			mutex_lock(&pd->lock);
+			pd->state &= ~POSEIDON_STATE_DVBT;
+			mutex_unlock(&pd->lock);
+		}
+		kref_put(&pd->kref, poseidon_delete);
+		usb_autopm_put_interface(pd->interface);
+	}
+	return ret;
+}
+
+static void poseidon_fe_release(struct dvb_frontend *fe)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+
+#ifdef CONFIG_PM
+	pd->pm_suspend = NULL;
+	pd->pm_resume  = NULL;
+#endif
+}
+
+static s32 poseidon_fe_sleep(struct dvb_frontend *fe)
+{
+	return 0;
+}
+
+/*
+ * return true if we can satisfy the conditions, else return false.
+ */
+static bool check_scan_ok(__u32 freq, int bandwidth,
+			struct pd_dvb_adapter *adapter)
+{
+	if (bandwidth < 0)
+		return false;
+
+	if (adapter->prev_freq == freq
+		&& adapter->bandwidth == bandwidth) {
+		long nl = jiffies - adapter->last_jiffies;
+		unsigned int msec ;
+
+		msec = jiffies_to_msecs(abs(nl));
+		return msec > 15000 ? true : false;
+	}
+	return true;
+}
+
+/*
+ * Check if the firmware delays too long for an invalid frequency.
+ */
+static int fw_delay_overflow(struct pd_dvb_adapter *adapter)
+{
+	long nl = jiffies - adapter->last_jiffies;
+	unsigned int msec ;
+
+	msec = jiffies_to_msecs(abs(nl));
+	return msec > 800 ? true : false;
+}
+
+static int poseidon_set_fe(struct dvb_frontend *fe,
+			struct dvb_frontend_parameters *fep)
+{
+	s32 ret = 0, cmd_status = 0;
+	s32 i, bandwidth = -1;
+	struct poseidon *pd = fe->demodulator_priv;
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+	if (in_hibernation(pd))
+		return -EBUSY;
+
+	mutex_lock(&pd->lock);
+	for (i = 0; i < dvb_bandwidth_length; i++)
+		if (fep->u.ofdm.bandwidth == dvb_bandwidth[i][1])
+			bandwidth = dvb_bandwidth[i][0];
+
+	if (check_scan_ok(fep->frequency, bandwidth, pd_dvb)) {
+		ret = send_set_req(pd, TUNE_FREQ_SELECT,
+					fep->frequency / 1000, &cmd_status);
+		if (ret | cmd_status) {
+			log("error line");
+			goto front_out;
+		}
+
+		ret = send_set_req(pd, DVBT_BANDW_SEL,
+						bandwidth, &cmd_status);
+		if (ret | cmd_status) {
+			log("error line");
+			goto front_out;
+		}
+
+		ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
+		if (ret | cmd_status) {
+			log("error line");
+			goto front_out;
+		}
+
+		/* save the context for future */
+		memcpy(&pd_dvb->fe_param, fep, sizeof(*fep));
+		pd_dvb->bandwidth = bandwidth;
+		pd_dvb->prev_freq = fep->frequency;
+		pd_dvb->last_jiffies = jiffies;
+	}
+front_out:
+	mutex_unlock(&pd->lock);
+	return ret;
+}
+
+#ifdef CONFIG_PM
+static int pm_dvb_suspend(struct poseidon *pd)
+{
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+	dvb_stop_streaming(pd_dvb);
+	dvb_urb_cleanup(pd_dvb);
+	msleep(500);
+	return 0;
+}
+
+static int pm_dvb_resume(struct poseidon *pd)
+{
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+	poseidon_check_mode_dvbt(pd);
+	msleep(300);
+	poseidon_set_fe(&pd_dvb->dvb_fe, &pd_dvb->fe_param);
+
+	dvb_start_streaming(pd_dvb);
+	return 0;
+}
+#endif
+
+static s32 poseidon_fe_init(struct dvb_frontend *fe)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+#ifdef CONFIG_PM
+	pd->pm_suspend = pm_dvb_suspend;
+	pd->pm_resume  = pm_dvb_resume;
+#endif
+	memset(&pd_dvb->fe_param, 0,
+			sizeof(struct dvb_frontend_parameters));
+	return 0;
+}
+
+static int poseidon_get_fe(struct dvb_frontend *fe,
+			struct dvb_frontend_parameters *fep)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+	memcpy(fep, &pd_dvb->fe_param, sizeof(*fep));
+	return 0;
+}
+
+static int poseidon_fe_get_tune_settings(struct dvb_frontend *fe,
+				struct dvb_frontend_tune_settings *tune)
+{
+	tune->min_delay_ms = 1000;
+	return 0;
+}
+
+static int poseidon_read_status(struct dvb_frontend *fe, fe_status_t *stat)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	s32 ret = -1, cmd_status;
+	struct tuner_dtv_sig_stat_s status = {};
+
+	if (in_hibernation(pd))
+		return -EBUSY;
+	mutex_lock(&pd->lock);
+
+	ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
+				&status, &cmd_status, sizeof(status));
+	if (ret | cmd_status) {
+		log("get tuner status error");
+		goto out;
+	}
+
+	if (debug_mode)
+		log("P : %d, L %d, LB :%d", status.sig_present,
+			status.sig_locked, status.sig_lock_busy);
+
+	if (status.sig_lock_busy) {
+		goto out;
+	} else if (status.sig_present || status.sig_locked) {
+		*stat |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER
+				| FE_HAS_SYNC | FE_HAS_VITERBI;
+	} else {
+		if (fw_delay_overflow(&pd->dvb_data))
+			*stat |= FE_TIMEDOUT;
+	}
+out:
+	mutex_unlock(&pd->lock);
+	return ret;
+}
+
+static int poseidon_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	struct tuner_ber_rate_s tlg_ber = {};
+	s32 ret = -1, cmd_status;
+
+	mutex_lock(&pd->lock);
+	ret = send_get_req(pd, TUNER_BER_RATE, 0,
+				&tlg_ber, &cmd_status, sizeof(tlg_ber));
+	if (ret | cmd_status)
+		goto out;
+	*ber = tlg_ber.ber_rate;
+out:
+	mutex_unlock(&pd->lock);
+	return ret;
+}
+
+static s32 poseidon_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct poseidon *pd = fe->demodulator_priv;
+	struct tuner_dtv_sig_stat_s status = {};
+	s32 ret = 0, cmd_status;
+
+	mutex_lock(&pd->lock);
+	ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
+				&status, &cmd_status, sizeof(status));
+	if (ret | cmd_status)
+		goto out;
+	if ((status.sig_present || status.sig_locked) && !status.sig_strength)
+		*strength = 0xFFFF;
+	else
+		*strength = status.sig_strength;
+out:
+	mutex_unlock(&pd->lock);
+	return ret;
+}
+
+static int poseidon_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	return 0;
+}
+
+static int poseidon_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
+{
+	*unc = 0;
+	return 0;
+}
+
+static struct dvb_frontend_ops poseidon_frontend_ops = {
+	.info = {
+		.name		= "Poseidon DVB-T",
+		.type		= FE_OFDM,
+		.frequency_min	= 174000000,
+		.frequency_max  = 862000000,
+		.frequency_stepsize	  = 62500,/* FIXME */
+		.caps = FE_CAN_INVERSION_AUTO |
+			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
+			FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
+			FE_CAN_GUARD_INTERVAL_AUTO |
+			FE_CAN_RECOVER |
+			FE_CAN_HIERARCHY_AUTO,
+	},
+
+	.release = poseidon_fe_release,
+
+	.init = poseidon_fe_init,
+	.sleep = poseidon_fe_sleep,
+
+	.set_frontend = poseidon_set_fe,
+	.get_frontend = poseidon_get_fe,
+	.get_tune_settings = poseidon_fe_get_tune_settings,
+
+	.read_status	= poseidon_read_status,
+	.read_ber	= poseidon_read_ber,
+	.read_signal_strength = poseidon_read_signal_strength,
+	.read_snr	= poseidon_read_snr,
+	.read_ucblocks	= poseidon_read_unc_blocks,
+
+	.ts_bus_ctrl = poseidon_ts_bus_ctrl,
+};
+
+static void dvb_urb_irq(struct urb *urb)
+{
+	struct pd_dvb_adapter *pd_dvb = urb->context;
+	int len = urb->transfer_buffer_length;
+	struct dvb_demux *demux = &pd_dvb->demux;
+	s32 ret;
+
+	if (!pd_dvb->is_streaming || urb->status) {
+		if (urb->status == -EPROTO)
+			goto resend;
+		return;
+	}
+
+	if (urb->actual_length == len)
+		dvb_dmx_swfilter(demux, urb->transfer_buffer, len);
+	else if (urb->actual_length == len - 4) {
+		int offset;
+		u8 *buf = urb->transfer_buffer;
+
+		/*
+		 * The packet size is 512,
+		 * last packet contains 456 bytes tsp data
+		 */
+		for (offset = 456; offset < len; offset += 512) {
+			if (!strncmp(buf + offset, "DVHS", 4)) {
+				dvb_dmx_swfilter(demux, buf, offset);
+				if (len > offset + 52 + 4) {
+					/*16 bytes trailer + 36 bytes padding */
+					buf += offset + 52;
+					len -= offset + 52 + 4;
+					dvb_dmx_swfilter(demux, buf, len);
+				}
+				break;
+			}
+		}
+	}
+
+resend:
+	ret = usb_submit_urb(urb, GFP_ATOMIC);
+	if (ret)
+		log(" usb_submit_urb failed: error %d", ret);
+}
+
+static int dvb_urb_init(struct pd_dvb_adapter *pd_dvb)
+{
+	if (pd_dvb->urb_array[0])
+		return 0;
+
+	alloc_bulk_urbs_generic(pd_dvb->urb_array, DVB_SBUF_NUM,
+			pd_dvb->pd_device->udev, pd_dvb->ep_addr,
+			DVB_URB_BUF_SIZE, GFP_KERNEL,
+			dvb_urb_irq, pd_dvb);
+	return 0;
+}
+
+static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb)
+{
+	free_all_urb_generic(pd_dvb->urb_array, DVB_SBUF_NUM);
+}
+
+static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb)
+{
+	struct poseidon *pd = pd_dvb->pd_device;
+	int ret = 0;
+
+	if (pd->state & POSEIDON_STATE_DISCONNECT)
+		return -ENODEV;
+
+	mutex_lock(&pd->lock);
+	if (!pd_dvb->is_streaming) {
+		s32 i, cmd_status = 0;
+		/*
+		 * Once upon a time, there was a difficult bug lying here.
+		 * ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
+		 */
+
+		ret = send_set_req(pd, PLAY_SERVICE, 1, &cmd_status);
+		if (ret | cmd_status)
+			goto out;
+
+		ret = dvb_urb_init(pd_dvb);
+		if (ret < 0)
+			goto out;
+
+		pd_dvb->is_streaming = 1;
+		for (i = 0; i < DVB_SBUF_NUM; i++) {
+			ret = usb_submit_urb(pd_dvb->urb_array[i],
+						       GFP_KERNEL);
+			if (ret) {
+				log(" submit urb error %d", ret);
+				goto out;
+			}
+		}
+	}
+out:
+	mutex_unlock(&pd->lock);
+	return ret;
+}
+
+void dvb_stop_streaming(struct pd_dvb_adapter *pd_dvb)
+{
+	struct poseidon *pd = pd_dvb->pd_device;
+
+	mutex_lock(&pd->lock);
+	if (pd_dvb->is_streaming) {
+		s32 i, ret, cmd_status = 0;
+
+		pd_dvb->is_streaming = 0;
+
+		for (i = 0; i < DVB_SBUF_NUM; i++)
+			if (pd_dvb->urb_array[i])
+				usb_kill_urb(pd_dvb->urb_array[i]);
+
+		ret = send_set_req(pd, PLAY_SERVICE, TLG_TUNE_PLAY_SVC_STOP,
+					&cmd_status);
+		if (ret | cmd_status)
+			log("error");
+	}
+	mutex_unlock(&pd->lock);
+}
+
+static int pd_start_feed(struct dvb_demux_feed *feed)
+{
+	struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
+	int ret = 0;
+
+	if (!pd_dvb)
+		return -1;
+	if (atomic_inc_return(&pd_dvb->active_feed) == 1)
+		ret = dvb_start_streaming(pd_dvb);
+	return ret;
+}
+
+static int pd_stop_feed(struct dvb_demux_feed *feed)
+{
+	struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
+
+	if (!pd_dvb)
+		return -1;
+	if (atomic_dec_and_test(&pd_dvb->active_feed))
+		dvb_stop_streaming(pd_dvb);
+	return 0;
+}
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+int pd_dvb_usb_device_init(struct poseidon *pd)
+{
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+	struct dvb_demux *dvbdemux;
+	int ret = 0;
+
+	pd_dvb->ep_addr = 0x82;
+	atomic_set(&pd_dvb->users, 0);
+	atomic_set(&pd_dvb->active_feed, 0);
+	pd_dvb->pd_device = pd;
+
+	ret = dvb_register_adapter(&pd_dvb->dvb_adap,
+				"Poseidon dvbt adapter",
+				THIS_MODULE,
+				NULL /* for hibernation correctly*/,
+				adapter_nr);
+	if (ret < 0)
+		goto error1;
+
+	/* register frontend */
+	pd_dvb->dvb_fe.demodulator_priv = pd;
+	memcpy(&pd_dvb->dvb_fe.ops, &poseidon_frontend_ops,
+			sizeof(struct dvb_frontend_ops));
+	ret = dvb_register_frontend(&pd_dvb->dvb_adap, &pd_dvb->dvb_fe);
+	if (ret < 0)
+		goto error2;
+
+	/* register demux device */
+	dvbdemux = &pd_dvb->demux;
+	dvbdemux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
+	dvbdemux->priv = pd_dvb;
+	dvbdemux->feednum = dvbdemux->filternum = 64;
+	dvbdemux->start_feed = pd_start_feed;
+	dvbdemux->stop_feed = pd_stop_feed;
+	dvbdemux->write_to_decoder = NULL;
+
+	ret = dvb_dmx_init(dvbdemux);
+	if (ret < 0)
+		goto error3;
+
+	pd_dvb->dmxdev.filternum = pd_dvb->demux.filternum;
+	pd_dvb->dmxdev.demux = &pd_dvb->demux.dmx;
+	pd_dvb->dmxdev.capabilities = 0;
+
+	ret = dvb_dmxdev_init(&pd_dvb->dmxdev, &pd_dvb->dvb_adap);
+	if (ret < 0)
+		goto error3;
+	return 0;
+
+error3:
+	dvb_unregister_frontend(&pd_dvb->dvb_fe);
+error2:
+	dvb_unregister_adapter(&pd_dvb->dvb_adap);
+error1:
+	return ret;
+}
+
+void pd_dvb_usb_device_exit(struct poseidon *pd)
+{
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+	while (atomic_read(&pd_dvb->users) != 0
+		|| atomic_read(&pd_dvb->active_feed) != 0) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(HZ);
+	}
+	dvb_dmxdev_release(&pd_dvb->dmxdev);
+	dvb_unregister_frontend(&pd_dvb->dvb_fe);
+	dvb_unregister_adapter(&pd_dvb->dvb_adap);
+	pd_dvb_usb_device_cleanup(pd);
+}
+
+void pd_dvb_usb_device_cleanup(struct poseidon *pd)
+{
+	struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
+
+	dvb_urb_cleanup(pd_dvb);
+}
+
+int pd_dvb_get_adapter_num(struct pd_dvb_adapter *pd_dvb)
+{
+	return pd_dvb->dvb_adap.num;
+}

drivers/media/video/tlg2300/pd-main.c

+/*
+ * device driver for Telegent tlg2300 based TV cards
+ *
+ * Author :
+ * 	Kang Yong	<kangyong@telegent.com>
+ * 	Zhang Xiaobing	<xbzhang@telegent.com>
+ * 	Huang Shijie	<zyziii@telegent.com> or <shijie8@gmail.com>
+ *
+ *	(c) 2009 Telegent Systems
+ *	(c) 2010 Telegent Systems
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kref.h>
+#include <linux/suspend.h>
+#include <linux/usb/quirks.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/firmware.h>
+#include <linux/smp_lock.h>
+
+#include "vendorcmds.h"
+#include "pd-common.h"
+
+#define VENDOR_ID	0x1B24
+#define PRODUCT_ID	0x4001
+static struct usb_device_id id_table[] = {
+	{ USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID, PRODUCT_ID, 255, 1, 0) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(VENDOR_ID, PRODUCT_ID, 255, 1, 1) },
+	{ },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+int debug_mode;
+module_param(debug_mode, int, 0644);
+MODULE_PARM_DESC(debug_mode, "0 = disable, 1 = enable, 2 = verbose");
+
+const char *firmware_name = "tlg2300_firmware.bin";
+struct usb_driver poseidon_driver;
+static LIST_HEAD(pd_device_list);
+
+/*
+ * send set request to USB firmware.
+ */
+s32 send_set_req(struct poseidon *pd, u8 cmdid, s32 param, s32 *cmd_status)
+{
+	s32 ret;
+	s8  data[32] = {};
+	u16 lower_16, upper_16;
+
+	if (pd->state & POSEIDON_STATE_DISCONNECT)
+		return -ENODEV;
+
+	mdelay(30);
+
+	if (param == 0) {
+		upper_16 = lower_16 = 0;
+	} else {
+		/* send 32 bit param as  two 16 bit param,little endian */
+		lower_16 = (unsigned short)(param & 0xffff);
+		upper_16 = (unsigned short)((param >> 16) & 0xffff);
+	}
+	ret = usb_control_msg(pd->udev,
+			 usb_rcvctrlpipe(pd->udev, 0),
+			 REQ_SET_CMD | cmdid,
+			 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			 lower_16,
+			 upper_16,
+			 &data,
+			 sizeof(*cmd_status),
+			 USB_CTRL_GET_TIMEOUT);
+
+	if (!ret) {
+		return -ENXIO;
+	} else {
+		/*  1st 4 bytes into cmd_status   */
+		memcpy((char *)cmd_status, &(data[0]), sizeof(*cmd_status));
+	}
+	return 0;
+}
+
+/*
+ * send get request to Poseidon firmware.
+ */
+s32 send_get_req(struct poseidon *pd, u8 cmdid, s32 param,
+			void *buf, s32 *cmd_status, s32 datalen)
+{
+	s32 ret;
+	s8 data[128] = {};
+	u16 lower_16, upper_16;
+
+	if (pd->state & POSEIDON_STATE_DISCONNECT)
+		return -ENODEV;
+
+	mdelay(30);
+	if (param == 0) {
+		upper_16 = lower_16 = 0;
+	} else {
+		/*send 32 bit param as two 16 bit param, little endian */
+		lower_16 = (unsigned short)(param & 0xffff);
+		upper_16 = (unsigned short)((param >> 16) & 0xffff);
+	}
+	ret = usb_control_msg(pd->udev,
+			 usb_rcvctrlpipe(pd->udev, 0),
+			 REQ_GET_CMD | cmdid,
+			 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			 lower_16,
+			 upper_16,
+			 &data,
+			 (datalen + sizeof(*cmd_status)),
+			 USB_CTRL_GET_TIMEOUT);
+
+	if (ret < 0) {
+		return -ENXIO;
+	} else {
+		/* 1st 4 bytes into cmd_status, remaining data into cmd_data */
+		memcpy((char *)cmd_status, &data[0], sizeof(*cmd_status));
+		memcpy((char *)buf, &data[sizeof(*cmd_status)], datalen);
+	}
+	return 0;
+}
+
+static int pm_notifier_block(struct notifier_block *nb,
+				unsigned long event, void *dummy)
+{
+	struct poseidon *pd = NULL;
+	struct list_head *node, *next;
+
+	switch (event) {
+	case PM_POST_HIBERNATION:
+		list_for_each_safe(node, next, &pd_device_list) {
+			struct usb_device *udev;
+			struct usb_interface *iface;
+			int rc = 0;
+
+			pd = container_of(node, struct poseidon, device_list);
+			udev = pd->udev;
+			iface = pd->interface;
+
+			/* It will cause the system to reload the firmware */
+			rc = usb_lock_device_for_reset(udev, iface);
+			if (rc >= 0) {
+				usb_reset_device(udev);
+				usb_unlock_device(udev);
+			}
+		}
+		break;
+	default:
+		break;
+	}
+	log("event :%ld\n", event);
+	return 0;
+}
+
+static struct notifier_block pm_notifer = {
+	.notifier_call = pm_notifier_block,
+};
+
+int set_tuner_mode(struct poseidon *pd, unsigned char mode)
+{
+	s32 ret, cmd_status;
+
+	if (pd->state & POSEIDON_STATE_DISCONNECT)
+		return -ENODEV;
+
+	ret = send_set_req(pd, TUNE_MODE_SELECT, mode, &cmd_status);
+	if (ret || cmd_status)
+		return -ENXIO;
+	return 0;
+}
+
+enum tlg__analog_audio_standard get_audio_std(s32 mode, s32 country_code)
+{
+	s32 nicam[] = {27, 32, 33, 34, 36, 44, 45, 46, 47, 48, 64,
+			65, 86, 351, 352, 353, 354, 358, 372, 852, 972};
+	s32 btsc[] = {1, 52, 54, 55, 886};
+	s32 eiaj[] = {81};
+	s32 i;
+
+	if (mode == TLG_MODE_FM_RADIO) {
+		if (country_code == 1)
+			return TLG_TUNE_ASTD_FM_US;
+		else
+			return TLG_TUNE_ASTD_FM_EUR;
+	} else if (mode == TLG_MODE_ANALOG_TV_UNCOMP) {
+		for (i = 0; i < sizeof(nicam) / sizeof(s32); i++) {
+			if (country_code == nicam[i])
+				return TLG_TUNE_ASTD_NICAM;
+		}
+
+		for (i = 0; i < sizeof(btsc) / sizeof(s32); i++) {
+			if (country_code == btsc[i])
+				return TLG_TUNE_ASTD_BTSC;
+		}
+
+		for (i = 0; i < sizeof(eiaj) / sizeof(s32); i++) {
+			if (country_code == eiaj[i])
+				return TLG_TUNE_ASTD_EIAJ;
+		}
+
+		return TLG_TUNE_ASTD_A2;
+	} else {
+		return TLG_TUNE_ASTD_NONE;
+	}
+}
+
+void poseidon_delete(struct kref *kref)
+{
+	struct poseidon *pd = container_of(kref, struct poseidon, kref);
+
+	if (!pd)
+		return;
+	list_del_init(&pd->device_list);
+
+	pd_dvb_usb_device_cleanup(pd);
+	/* clean_audio_data(&pd->audio_data);*/
+
+	if (pd->udev) {
+		usb_put_dev(pd->udev);
+		pd->udev = NULL;
+	}
+	if (pd->interface) {
+		usb_put_intf(pd->interface);
+		pd->interface = NULL;
+	}
+	kfree(pd);
+	log();
+}
+
+static int firmware_download(struct usb_device *udev)
+{
+	int ret = 0, actual_length;
+	const struct firmware *fw = NULL;
+	void *fwbuf = NULL;
+	size_t fwlength = 0, offset;
+	size_t max_packet_size;
+
+	ret = request_firmware(&fw, firmware_name, &udev->dev);
+	if (ret) {
+		log("download err : %d", ret);
+		return ret;
+	}
+
+	fwlength = fw->size;
+
+	fwbuf = kzalloc(fwlength, GFP_KERNEL);
+	if (!fwbuf) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	memcpy(fwbuf, fw->data, fwlength);
+
+	max_packet_size = udev->ep_out[0x1]->desc.wMaxPacketSize;
+	log("\t\t download size : %d", (int)max_packet_size);
+
+	for (offset = 0; offset < fwlength; offset += max_packet_size) {
+		actual_length = 0;
+		ret = usb_bulk_msg(udev,
+				usb_sndbulkpipe(udev, 0x01), /* ep 1 */
+				fwbuf + offset,
+				min(max_packet_size, fwlength - offset),
+				&actual_length,
+				HZ * 10);
+		if (ret)
+			break;
+	}
+	kfree(fwbuf);
+out:
+	release_firmware(fw);
+	return ret;
+}
+
+#ifdef CONFIG_PM
+/* one-to-one map : poseidon{} <----> usb_device{}'s port */
+static inline void set_map_flags(struct poseidon *pd, struct usb_device *udev)
+{
+	pd->portnum = udev->portnum;
+}
+
+static inline int get_autopm_ref(struct poseidon *pd)
+{
+	return  pd->video_data.users + pd->vbi_data.users + pd->audio.users
+		+ atomic_read(&pd->dvb_data.users) + pd->radio_data.users;
+}
+
+/* fixup something for poseidon */
+static inline struct poseidon *fixup(struct poseidon *pd)
+{
+	int count;
+
+	/* old udev and interface have gone, so put back reference . */
+	count = get_autopm_ref(pd);
+	log("count : %d, ref count : %d", count, get_pm_count(pd));
+	while (count--)
+		usb_autopm_put_interface(pd->interface);
+	/*usb_autopm_set_interface(pd->interface); */
+
+	usb_put_dev(pd->udev);
+	usb_put_intf(pd->interface);
+	log("event : %d\n", pd->msg.event);
+	return pd;
+}
+
+static struct poseidon *find_old_poseidon(struct usb_device *udev)
+{
+	struct poseidon *pd;
+
+	list_for_each_entry(pd, &pd_device_list, device_list) {
+		if (pd->portnum == udev->portnum && in_hibernation(pd))
+			return fixup(pd);
+	}
+	return NULL;
+}
+
+/* Is the card working now ? */
+static inline int is_working(struct poseidon *pd)
+{
+	return get_pm_count(pd) > 0;
+}
+
+static inline struct poseidon *get_pd(struct usb_interface *intf)
+{
+	return usb_get_intfdata(intf);
+}
+
+static int poseidon_suspend(struct usb_interface *intf, pm_message_t msg)
+{
+	struct poseidon *pd = get_pd(intf);
+
+	if (!pd)
+		return 0;
+	if (!is_working(pd)) {
+		if (get_pm_count(pd) <= 0 && !in_hibernation(pd)) {
+			pd->msg.event = PM_EVENT_AUTO_SUSPEND;
+			pd->pm_resume = NULL; /*  a good guard */
+			printk(KERN_DEBUG "\n\t+ TLG2300 auto suspend +\n\n");
+		}
+		return 0;
+	}
+	pd->msg = msg; /* save it here */
+	logpm(pd);
+	return pd->pm_suspend ? pd->pm_suspend(pd) : 0;
+}
+
+static int poseidon_resume(struct usb_interface *intf)
+{
+	struct poseidon *pd = get_pd(intf);
+
+	if (!pd)
+		return 0;
+	printk(KERN_DEBUG "\n\t ++ TLG2300 resume ++\n\n");
+
+	if (!is_working(pd)) {
+		if (PM_EVENT_AUTO_SUSPEND == pd->msg.event)
+			pd->msg = PMSG_ON;
+		return 0;
+	}
+	if (in_hibernation(pd)) {
+		logpm(pd);
+		return 0;
+	}
+	logpm(pd);
+	return pd->pm_resume ? pd->pm_resume(pd) : 0;
+}
+
+static void hibernation_resume(struct work_struct *w)
+{
+	struct poseidon *pd = container_of(w, struct poseidon, pm_work);
+	int count;
+
+	pd->msg.event = 0; /* clear it here */
+	pd->state &= ~POSEIDON_STATE_DISCONNECT;
+
+	/* set the new interface's reference */
+	count = get_autopm_ref(pd);
+	while (count--)
+		usb_autopm_get_interface(pd->interface);
+
+	/* resume the context */
+	logpm(pd);
+	if (pd->pm_resume)
+		pd->pm_resume(pd);
+}
+#endif
+
+static bool check_firmware(struct usb_device *udev, int *down_firmware)
+{
+	void *buf;
+	int ret;
+	struct cmd_firmware_vers_s *cmd_firm;
+
+	buf = kzalloc(sizeof(*cmd_firm) + sizeof(u32), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	ret = usb_control_msg(udev,
+			 usb_rcvctrlpipe(udev, 0),
+			 REQ_GET_CMD | GET_FW_ID,
+			 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			 0,
+			 0,
+			 buf,
+			 sizeof(*cmd_firm) + sizeof(u32),
+			 USB_CTRL_GET_TIMEOUT);
+	kfree(buf);
+
+	if (ret < 0) {
+		*down_firmware = 1;
+		return firmware_download(udev);
+	}
+	return ret;
+}
+
+static int poseidon_probe(struct usb_interface *interface,
+				const struct usb_device_id *id)
+{
+	struct usb_device *udev = interface_to_usbdev(interface);
+	struct poseidon *pd = NULL;
+	int ret = 0;
+	int new_one = 0;
+
+	/* download firmware */
+	check_firmware(udev, &ret);
+	if (ret)
+		return 0;
+
+	/* Do I recovery from the hibernate ? */
+	pd = find_old_poseidon(udev);
+	if (!pd) {
+		pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+		if (!pd)
+			return -ENOMEM;
+		kref_init(&pd->kref);
+		set_map_flags(pd, udev);
+		new_one = 1;
+	}
+
+	pd->udev	= usb_get_dev(udev);
+	pd->interface	= usb_get_intf(interface);
+	usb_set_intfdata(interface, pd);
+
+	if (new_one) {
+		struct device *dev = &interface->dev;
+
+		logpm(pd);
+		pd->country_code = 86;
+		mutex_init(&pd->lock);
+
+		/* register v4l2 device */
+		snprintf(pd->v4l2_dev.name, sizeof(pd->v4l2_dev.name), "%s %s",
+			dev->driver->name, dev_name(dev));
+		ret = v4l2_device_register(NULL, &pd->v4l2_dev);
+
+		/* register devices in directory /dev */
+		ret = pd_video_init(pd);
+		poseidon_audio_init(pd);
+		poseidon_fm_init(pd);
+		pd_dvb_usb_device_init(pd);
+
+		INIT_LIST_HEAD(&pd->device_list);
+		list_add_tail(&pd->device_list, &pd_device_list);
+	}
+
+	device_init_wakeup(&udev->dev, 1);
+#ifdef CONFIG_PM
+	pd->udev->autosuspend_disabled = 0;
+	pd->udev->autosuspend_delay = HZ * PM_SUSPEND_DELAY;
+
+	if (in_hibernation(pd)) {
+		INIT_WORK(&pd->pm_work, hibernation_resume);
+		schedule_work(&pd->pm_work);
+	}
+#endif
+	return 0;
+}
+
+static void poseidon_disconnect(struct usb_interface *interface)
+{
+	struct poseidon *pd = get_pd(interface);
+
+	if (!pd)
+		return;
+	logpm(pd);
+	if (in_hibernation(pd))
+		return;
+
+	mutex_lock(&pd->lock);
+	pd->state |= POSEIDON_STATE_DISCONNECT;
+	mutex_unlock(&pd->lock);
+
+	/* stop urb transferring */
+	stop_all_video_stream(pd);
+	dvb_stop_streaming(&pd->dvb_data);
+
+	/*unregister v4l2 device */
+	v4l2_device_unregister(&pd->v4l2_dev);
+
+	lock_kernel();
+	{
+		pd_dvb_usb_device_exit(pd);
+		poseidon_fm_exit(pd);
+
+		poseidon_audio_free(pd);
+		pd_video_exit(pd);
+	}
+	unlock_kernel();
+
+	usb_set_intfdata(interface, NULL);
+	kref_put(&pd->kref, poseidon_delete);
+}
+
+struct usb_driver poseidon_driver = {
+	.name		= "poseidon",
+	.probe		= poseidon_probe,
+	.disconnect	= poseidon_disconnect,
+	.id_table	= id_table,
+#ifdef CONFIG_PM
+	.suspend	= poseidon_suspend,
+	.resume		= poseidon_resume,
+#endif
+	.supports_autosuspend = 1,
+};
+
+static int __init poseidon_init(void)
+{
+	int ret;
+
+	ret = usb_register(&poseidon_driver);
+	if (ret)
+		return ret;
+	register_pm_notifier(&pm_notifer);
+	return ret;
+}
+
+static void __exit poseidon_exit(void)
+{
+	log();
+	unregister_pm_notifier(&pm_notifer);
+	usb_deregister(&poseidon_driver);
+}
+
+module_init(poseidon_init);
+module_exit(poseidon_exit);
+
+MODULE_AUTHOR("Telegent Systems");
+MODULE_DESCRIPTION("For tlg2300-based USB device ");
+MODULE_LICENSE("GPL");

drivers/media/video/tlg2300/pd-radio.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/version.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <media/v4l2-ioctl.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 76000000
+#define TUNER_FREQ_MAX_FM 108000000
+
+static int poseidon_check_mode_radio(struct poseidon *p)
+{
+	int ret, radiomode;
+	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);
+	radiomode = get_audio_std(TLG_MODE_FM_RADIO, p->country_code);
+	ret = send_set_req(p, TUNER_AUD_ANA_STD, radiomode, &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 video_device *vfd = video_devdata(filp);
+	struct poseidon *p = video_get_drvdata(vfd);
+	int ret = 0;
+
+	if (!p)
+		return -1;
+
+	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;
+	}
+
+	usb_autopm_get_interface(p->interface);
+	if (0 == p->state) {
+		p->country_code = country_code;
+		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;
+	}
+	p->radio_data.users++;
+	kref_get(&p->kref);
+	filp->private_data = p;
+out:
+	mutex_unlock(&p->lock);
+	return ret;
+}
+
+static int poseidon_fm_close(struct file *filp)
+{
+	struct poseidon *p = filp->private_data;
+	struct radio_data *fm = &p->radio_data;
+	uint32_t status;
+
+	mutex_lock(&p->lock);
+	fm->users--;
+	if (0 == fm->users)
+		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);
+	filp->private_data = NULL;
+	return 0;
+}
+
+static int vidioc_querycap(struct file *file, void *priv,
+			struct v4l2_capability *v)
+{
+	struct poseidon *p = file->private_data;
+
+	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->version = KERNEL_VERSION(0, 0, 1);
+	v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
+	return 0;
+}
+
+static const struct v4l2_file_operations poseidon_fm_fops = {
+	.owner         = THIS_MODULE,
+	.open          = poseidon_fm_open,
+	.release       = poseidon_fm_close,
+	.ioctl	       = video_ioctl2,
+};
+
+int tlg_fm_vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *vt)
+{
+	struct tuner_fm_sig_stat_s fm_stat = {};
+	int ret, status, count = 5;
+	struct poseidon *p = file->private_data;
+
+	if (vt->index != 0)
+		return -EINVAL;
+
+	vt->type	= V4L2_TUNER_RADIO;
+	vt->capability	= V4L2_TUNER_CAP_STEREO;
+	vt->rangelow	= TUNER_FREQ_MIN_FM / 62500;
+	vt->rangehigh	= TUNER_FREQ_MAX_FM / 62500;
+	vt->rxsubchans	= V4L2_TUNER_SUB_STEREO;
+	vt->audmode	= V4L2_TUNER_MODE_STEREO;
+	vt->signal	= 0;
+	vt->afc 	= 0;
+
+	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;
+}
+
+int fm_get_freq(struct file *file, void *priv, struct v4l2_frequency *argp)
+{
+	struct poseidon *p = file->private_data;
+
+	argp->frequency = p->radio_data.fm_freq;
+	return 0;
+}
+
+static int set_frequency(struct poseidon *p, __u32 frequency)
+{
+	__u32 freq ;
+	int ret, status, radiomode;
+
+	mutex_lock(&p->lock);
+
+	radiomode = get_audio_std(TLG_MODE_FM_RADIO, p->country_code);
+	/*NTSC 8,PAL 2 */
+	ret = send_set_req(p, TUNER_AUD_ANA_STD, radiomode, &status);
+
+	freq =  (frequency * 125) * 500 / 1000;/* kHZ */
+	if (freq < TUNER_FREQ_MIN_FM/1000 || freq > TUNER_FREQ_MAX_FM/1000) {
+		ret = -EINVAL;
+		goto error;
+	}
+
+	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 = frequency;
+error:
+	mutex_unlock(&p->lock);
+	return ret;
+}
+
+int fm_set_freq(struct file *file, void *priv, struct v4l2_frequency *argp)
+{
+	struct poseidon *p = file->private_data;
+
+	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);
+}
+
+int tlg_fm_vidioc_g_ctrl(struct file *file, void *priv,
+		struct v4l2_control *arg)
+{
+    return 0;
+}
+
+int tlg_fm_vidioc_exts_ctrl(struct file *file, void *fh,
+		struct v4l2_ext_controls *a)
+{
+    return 0;
+}
+
+int tlg_fm_vidioc_s_ctrl(struct file *file, void *priv,
+		struct v4l2_control *arg)
+{
+    return 0;
+}
+
+int tlg_fm_vidioc_queryctrl(struct file *file, void *priv,
+		struct v4l2_queryctrl *arg)
+{
+	arg->minimum = 0;
+	arg->maximum = 65535;
+	return 0;
+}
+
+static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *vt)
+{
+	return vt->index > 0 ? -EINVAL : 0;
+}
+static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *va)
+{
+	return (va->index != 0) ? -EINVAL : 0;
+}
+
+static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
+{
+	a->index    = 0;
+	a->mode    = 0;
+	a->capability = V4L2_AUDCAP_STEREO;
+	strcpy(a->name, "Radio");
+	return 0;
+}
+
+static int vidioc_s_input(struct file *filp, void *priv, u32 i)
+{
+	return (i != 0) ? -EINVAL : 0;
+}
+
+static int vidioc_g_input(struct file *filp, void *priv, u32 *i)
+{
+	return (*i != 0) ? -EINVAL : 0;
+}
+
+static const struct v4l2_ioctl_ops poseidon_fm_ioctl_ops = {
+	.vidioc_querycap    = vidioc_querycap,
+	.vidioc_g_audio     = vidioc_g_audio,
+	.vidioc_s_audio     = vidioc_s_audio,
+	.vidioc_g_input     = vidioc_g_input,
+	.vidioc_s_input     = vidioc_s_input,
+	.vidioc_queryctrl   = tlg_fm_vidioc_queryctrl,
+	.vidioc_g_ctrl      = tlg_fm_vidioc_g_ctrl,
+	.vidioc_s_ctrl      = tlg_fm_vidioc_s_ctrl,
+	.vidioc_s_ext_ctrls = tlg_fm_vidioc_exts_ctrl,
+	.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,
+};
+
+static struct video_device poseidon_fm_template = {
+	.name       = "Telegent-Radio",
+	.fops       = &poseidon_fm_fops,
+	.minor      = -1,
+	.release    = video_device_release,
+	.ioctl_ops  = &poseidon_fm_ioctl_ops,
+};
+
+int poseidon_fm_init(struct poseidon *p)
+{
+	struct video_device *fm_dev;
+
+	fm_dev = vdev_init(p, &poseidon_fm_template);
+	if (fm_dev == NULL)
+		return -1;
+
+	if (video_register_device(fm_dev, VFL_TYPE_RADIO, -1) < 0) {
+		video_device_release(fm_dev);
+		return -1;
+	}
+	p->radio_data.fm_dev = fm_dev;
+	return 0;
+}
+
+int poseidon_fm_exit(struct poseidon *p)
+{
+	destroy_video_device(&p->radio_data.fm_dev);
+	return 0;
+}

drivers/media/video/tlg2300/vendorcmds.h

+#ifndef VENDOR_CMD_H_
+#define VENDOR_CMD_H_
+
+#define BULK_ALTERNATE_IFACE		(2)
+#define ISO_3K_BULK_ALTERNATE_IFACE     (1)
+#define REQ_SET_CMD			(0X00)
+#define REQ_GET_CMD			(0X80)
+
+enum tlg__analog_audio_standard {
+	TLG_TUNE_ASTD_NONE	= 0x00000000,
+	TLG_TUNE_ASTD_A2	= 0x00000001,
+	TLG_TUNE_ASTD_NICAM	= 0x00000002,
+	TLG_TUNE_ASTD_EIAJ	= 0x00000004,
+	TLG_TUNE_ASTD_BTSC	= 0x00000008,
+	TLG_TUNE_ASTD_FM_US	= 0x00000010,
+	TLG_TUNE_ASTD_FM_EUR	= 0x00000020,
+	TLG_TUNE_ASTD_ALL	= 0x0000003f
+};
+
+/*
+ * identifiers for Custom Parameter messages.
+ * @typedef cmd_custom_param_id_t
+ */
+enum cmd_custom_param_id {
+	CUST_PARM_ID_NONE		= 0x00,
+	CUST_PARM_ID_BRIGHTNESS_CTRL	= 0x01,
+	CUST_PARM_ID_CONTRAST_CTRL	= 0x02,
+	CUST_PARM_ID_HUE_CTRL		= 0x03,
+	CUST_PARM_ID_SATURATION_CTRL	  = 0x04,
+	CUST_PARM_ID_AUDIO_SNR_THRESHOLD  = 0x10,
+	CUST_PARM_ID_AUDIO_AGC_THRESHOLD  = 0x11,
+	CUST_PARM_ID_MAX
+};
+
+struct  tuner_custom_parameter_s {
+	uint16_t	param_id;	 /*  Parameter identifier  */
+	uint16_t	param_value;	 /*  Parameter value	   */
+};
+
+struct  tuner_ber_rate_s {
+	uint32_t	ber_rate;  /*  BER sample rate in seconds   */
+};
+
+struct tuner_atv_sig_stat_s {
+	uint32_t	sig_present;
+	uint32_t	sig_locked;
+	uint32_t	sig_lock_busy;
+	uint32_t	sig_strength;	   /*  milliDb	  */
+	uint32_t	tv_audio_chan;	  /*  mono/stereo/sap*/
+	uint32_t 	mvision_stat;	   /*  macrovision status */
+};
+
+struct tuner_dtv_sig_stat_s {
+	uint32_t sig_present;   /*  Boolean*/
+	uint32_t sig_locked;	/*  Boolean */
+	uint32_t sig_lock_busy; /*  Boolean	(Can this time-out?) */
+	uint32_t sig_strength;  /*  milliDb*/
+};
+
+struct tuner_fm_sig_stat_s {
+	uint32_t sig_present;	/* Boolean*/
+	uint32_t sig_locked;	 /* Boolean */
+	uint32_t sig_lock_busy;  /* Boolean */
+	uint32_t sig_stereo_mono;/* TBD*/
+	uint32_t sig_strength;   /* milliDb*/
+};
+
+enum _tag_tlg_tune_srv_cmd {
+	TLG_TUNE_PLAY_SVC_START = 1,
+	TLG_TUNE_PLAY_SVC_STOP
+};
+
+enum  _tag_tune_atv_audio_mode_caps {
+	TLG_TUNE_TVAUDIO_MODE_MONO	= 0x00000001,
+	TLG_TUNE_TVAUDIO_MODE_STEREO	= 0x00000002,
+	TLG_TUNE_TVAUDIO_MODE_LANG_A	= 0x00000010,/* Primary language*/
+	TLG_TUNE_TVAUDIO_MODE_LANG_B	= 0x00000020,/* 2nd avail language*/
+	TLG_TUNE_TVAUDIO_MODE_LANG_C	= 0x00000040
+};
+
+
+enum   _tag_tuner_atv_audio_rates {
+	ATV_AUDIO_RATE_NONE	= 0x00,/* Audio not supported*/
+	ATV_AUDIO_RATE_32K	= 0x01,/* Audio rate = 32 KHz*/
+	ATV_AUDIO_RATE_48K	= 0x02, /* Audio rate = 48 KHz*/
+	ATV_AUDIO_RATE_31_25K	= 0x04 /* Audio rate = 31.25KHz */
+};
+
+enum  _tag_tune_atv_vid_res_caps {
+	TLG_TUNE_VID_RES_NONE	= 0x00000000,
+	TLG_TUNE_VID_RES_720	= 0x00000001,
+	TLG_TUNE_VID_RES_704	= 0x00000002,
+	TLG_TUNE_VID_RES_360	= 0x00000004
+};
+
+enum _tag_tuner_analog_video_format {
+	TLG_TUNER_VID_FORMAT_YUV	= 0x00000001,
+	TLG_TUNER_VID_FORMAT_YCRCB	= 0x00000002,
+	TLG_TUNER_VID_FORMAT_RGB_565	= 0x00000004,
+};
+
+enum  tlg_ext_audio_support {
+	TLG_EXT_AUDIO_NONE 	= 0x00,/*  No external audio input supported */
+	TLG_EXT_AUDIO_LR	= 0x01/*  LR external audio inputs supported*/
+};
+
+enum {
+	TLG_MODE_NONE			= 0x00, /* No Mode specified*/
+	TLG_MODE_ANALOG_TV		= 0x01, /* Analog Television mode*/
+	TLG_MODE_ANALOG_TV_UNCOMP	= 0x01, /* Analog Television mode*/
+	TLG_MODE_ANALOG_TV_COMP  	= 0x02, /* Analog TV mode (compressed)*/
+	TLG_MODE_FM_RADIO		= 0x04, /* FM Radio mode*/
+	TLG_MODE_DVB_T			= 0x08, /* Digital TV (DVB-T)*/
+};
+
+enum  tlg_signal_sources_t {
+	TLG_SIG_SRC_NONE	= 0x00,/* Signal source not specified */
+	TLG_SIG_SRC_ANTENNA	= 0x01,/* Signal src is: Antenna */
+	TLG_SIG_SRC_CABLE	= 0x02,/* Signal src is: Coax Cable*/
+	TLG_SIG_SRC_SVIDEO	= 0x04,/* Signal src is: S_VIDEO   */
+	TLG_SIG_SRC_COMPOSITE   = 0x08 /* Signal src is: Composite Video */
+};
+
+enum tuner_analog_video_standard {
+	TLG_TUNE_VSTD_NONE	= 0x00000000,
+	TLG_TUNE_VSTD_NTSC_M	= 0x00000001,
+	TLG_TUNE_VSTD_NTSC_M_J	= 0x00000002,/* Japan   */
+	TLG_TUNE_VSTD_PAL_B	= 0x00000010,
+	TLG_TUNE_VSTD_PAL_D	= 0x00000020,
+	TLG_TUNE_VSTD_PAL_G	= 0x00000040,
+	TLG_TUNE_VSTD_PAL_H	= 0x00000080,
+	TLG_TUNE_VSTD_PAL_I	= 0x00000100,
+	TLG_TUNE_VSTD_PAL_M	= 0x00000200,
+	TLG_TUNE_VSTD_PAL_N	= 0x00000400,
+	TLG_TUNE_VSTD_SECAM_B	= 0x00001000,
+	TLG_TUNE_VSTD_SECAM_D	= 0x00002000,
+	TLG_TUNE_VSTD_SECAM_G	= 0x00004000,
+	TLG_TUNE_VSTD_SECAM_H	= 0x00008000,
+	TLG_TUNE_VSTD_SECAM_K	= 0x00010000,
+	TLG_TUNE_VSTD_SECAM_K1	= 0x00020000,
+	TLG_TUNE_VSTD_SECAM_L	= 0x00040000,
+	TLG_TUNE_VSTD_SECAM_L1	= 0x00080000,
+	TLG_TUNE_VSTD_PAL_N_COMBO = 0x00100000
+};
+
+enum tlg_mode_caps {
+	TLG_MODE_CAPS_NONE		= 0x00,  /*  No Mode specified	*/
+	TLG_MODE_CAPS_ANALOG_TV_UNCOMP  = 0x01,  /*  Analog TV mode     */
+	TLG_MODE_CAPS_ANALOG_TV_COMP	= 0x02,  /*  Analog TV (compressed)*/
+	TLG_MODE_CAPS_FM_RADIO		= 0x04,  /*  FM Radio mode	*/
+	TLG_MODE_CAPS_DVB_T		= 0x08,  /*  Digital TV (DVB-T)	*/
+};
+
+enum poseidon_vendor_cmds {
+	LAST_CMD_STAT		= 0x00,
+	GET_CHIP_ID		= 0x01,
+	GET_FW_ID		= 0x02,
+	PRODUCT_CAPS		= 0x03,
+
+	TUNE_MODE_CAP_ATV	= 0x10,
+	TUNE_MODE_CAP_ATVCOMP	= 0X10,
+	TUNE_MODE_CAP_DVBT	= 0x10,
+	TUNE_MODE_CAP_FM	= 0x10,
+	TUNE_MODE_SELECT	= 0x11,
+	TUNE_FREQ_SELECT	= 0x12,
+	SGNL_SRC_SEL		= 0x13,
+
+	VIDEO_STD_SEL		= 0x14,
+	VIDEO_STREAM_FMT_SEL	= 0x15,
+	VIDEO_ROSOLU_AVAIL	= 0x16,
+	VIDEO_ROSOLU_SEL	= 0x17,
+	VIDEO_CONT_PROTECT	= 0x20,
+
+	VCR_TIMING_MODSEL	= 0x21,
+	EXT_AUDIO_CAP		= 0x22,
+	EXT_AUDIO_SEL		= 0x23,
+	TEST_PATTERN_SEL	= 0x24,
+	VBI_DATA_SEL		= 0x25,
+	AUDIO_SAMPLE_RATE_CAP   = 0x28,
+	AUDIO_SAMPLE_RATE_SEL   = 0x29,
+	TUNER_AUD_MODE		= 0x2a,
+	TUNER_AUD_MODE_AVAIL	= 0x2b,
+	TUNER_AUD_ANA_STD	= 0x2c,
+	TUNER_CUSTOM_PARAMETER	= 0x2f,
+
+	DVBT_TUNE_MODE_SEL	= 0x30,
+	DVBT_BANDW_CAP		= 0x31,
+	DVBT_BANDW_SEL		= 0x32,
+	DVBT_GUARD_INTERV_CAP   = 0x33,
+	DVBT_GUARD_INTERV_SEL   = 0x34,
+	DVBT_MODULATION_CAP	= 0x35,
+	DVBT_MODULATION_SEL	= 0x36,
+	DVBT_INNER_FEC_RATE_CAP = 0x37,
+	DVBT_INNER_FEC_RATE_SEL = 0x38,
+	DVBT_TRANS_MODE_CAP	= 0x39,
+	DVBT_TRANS_MODE_SEL	= 0x3a,
+	DVBT_SEARCH_RANG	= 0x3c,
+
+	TUNER_SETUP_ANALOG	= 0x40,
+	TUNER_SETUP_DIGITAL	= 0x41,
+	TUNER_SETUP_FM_RADIO	= 0x42,
+	TAKE_REQUEST		= 0x43, /* Take effect of the command */
+	PLAY_SERVICE		= 0x44, /* Play start or Play stop */
+	TUNER_STATUS		= 0x45,
+	TUNE_PROP_DVBT		= 0x46,
+	ERR_RATE_STATS		= 0x47,
+	TUNER_BER_RATE		= 0x48,
+
+	SCAN_CAPS		= 0x50,
+	SCAN_SETUP		= 0x51,
+	SCAN_SERVICE		= 0x52,
+	SCAN_STATS		= 0x53,
+
+	PID_SET			= 0x58,
+	PID_UNSET		= 0x59,
+	PID_LIST		= 0x5a,
+
+	IRD_CAP			= 0x60,
+	IRD_MODE_SEL		= 0x61,
+	IRD_SETUP		= 0x62,
+
+	PTM_MODE_CAP		= 0x70,
+	PTM_MODE_SEL		= 0x71,
+	PTM_SERVICE		= 0x72,
+	TUNER_REG_SCRIPT	= 0x73,
+	CMD_CHIP_RST		= 0x74,
+};
+
+enum tlg_bw {
+	TLG_BW_5 = 5,
+	TLG_BW_6 = 6,
+	TLG_BW_7 = 7,
+	TLG_BW_8 = 8,
+	TLG_BW_12 = 12,
+	TLG_BW_15 = 15
+};
+
+struct cmd_firmware_vers_s {
+	uint8_t	 fw_rev_major;
+	uint8_t	 fw_rev_minor;
+	uint16_t fw_patch;
+};
+#endif /* VENDOR_CMD_H_ */