DVB-T2 stick

Hi!

The patch in the attachment makes it possible to use the Logilink
VG0022a DVB-T2 USB stick and watch TV (at least in Germany).
After patching and building the kernel it shows up with lsusb and I
used w_scan to scan for channels and vlc for watching.
The original patches were from Andreas Kemnade.

Maybe you want to include it in Ubuntu.

Thanks

Hi,

On Tue, 3 Apr 2018 12:25:20 +0200
Gonsolo <gonsolo@gmail.com> wrote:

> Hi!
> 
> The patch in the attachment makes it possible to use the Logilink
> VG0022a DVB-T2 USB stick and watch TV (at least in Germany).
> After patching and building the kernel it shows up with lsusb and I
> used w_scan to scan for channels and vlc for watching.
> The original patches were from Andreas Kemnade.
> 
> Maybe you want to include it in Ubuntu.
> 
just for reference: the original patchset:
https://patchwork.linuxtv.org/patch/40089/

I will probably try to update and improve it.

Regards,
Andreas

Aktualisierter Patch fuer 5.0-rc4.
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index d389f1fc237a..1f923418ff10 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -84,7 +84,7 @@ static int si2157_init(struct dvb_frontend *fe)
 	struct si2157_cmd cmd;
 	const struct firmware *fw;
 	const char *fw_name;
-	unsigned int uitmp, chip_id;
+        unsigned int uitmp;
 
 	dev_dbg(&client->dev, "\n");
 
@@ -126,7 +126,7 @@ static int si2157_init(struct dvb_frontend *fe)
 		if (ret)
 			goto err;
 	}
-
+#if 0
 	/* query chip revision */
 	memcpy(cmd.args, "\x02", 1);
 	cmd.wlen = 1;
@@ -146,6 +146,8 @@ static int si2157_init(struct dvb_frontend *fe)
 	#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
 
 	switch (chip_id) {
+#endif
+        switch (dev->chip_id) {
 	case SI2158_A20:
 	case SI2148_A20:
 		fw_name = SI2158_A20_FIRMWARE;
@@ -166,9 +168,9 @@ static int si2157_init(struct dvb_frontend *fe)
 		goto err;
 	}
 
-	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
-			cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
-
+//	dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
+//			cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+//
 	if (fw_name == NULL)
 		goto skip_fw_download;
 
@@ -461,6 +463,38 @@ static int si2157_probe(struct i2c_client *client,
 	memcpy(&fe->ops.tuner_ops, &si2157_ops, sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = client;
 
+       /* power up */
+       if (dev->chiptype == SI2157_CHIPTYPE_SI2146) {
+               memcpy(cmd.args, "\xc0\x05\x01\x00\x00\x0b\x00\x00\x01", 9);
+               cmd.wlen = 9;
+       } else {
+               memcpy(cmd.args,
+               "\xc0\x00\x0c\x00\x00\x01\x01\x01\x01\x01\x01\x02\x00\x00\x01",
+               15);
+               cmd.wlen = 15;
+       }
+       cmd.rlen = 1;
+       ret = si2157_cmd_execute(client, &cmd);
+       if (ret)
+               goto err;
+       /* query chip revision */
+       /* hack: do it here because after the si2168 gets 0101, commands will
+        * still be executed here but no result
+        */
+       memcpy(cmd.args, "\x02", 1);
+       cmd.wlen = 1;
+       cmd.rlen = 13;
+       ret = si2157_cmd_execute(client, &cmd);
+       if (ret)
+               goto err_kfree;
+       dev->chip_id = cmd.args[1] << 24 |
+                       cmd.args[2] << 16 |
+                       cmd.args[3] << 8 |
+                       cmd.args[4] << 0;
+       dev_info(&client->dev, "found a 'Silicon Labs Si21%d-%c%c%c'\n",
+                       cmd.args[2], cmd.args[1], cmd.args[3], cmd.args[4]);
+ 
+
 #ifdef CONFIG_MEDIA_CONTROLLER
 	if (cfg->mdev) {
 		dev->mdev = cfg->mdev;
diff --git a/drivers/media/tuners/si2157_priv.h b/drivers/media/tuners/si2157_priv.h
index 50f86300d965..3592146cf49a 100644
--- a/drivers/media/tuners/si2157_priv.h
+++ b/drivers/media/tuners/si2157_priv.h
@@ -37,6 +37,7 @@ struct si2157_dev {
 	u8 chiptype;
 	u8 if_port;
 	u32 if_frequency;
+        u32 chip_id;
 	struct delayed_work stat_work;
 
 #if defined(CONFIG_MEDIA_CONTROLLER)
@@ -51,6 +52,13 @@ struct si2157_dev {
 #define SI2157_CHIPTYPE_SI2146 1
 #define SI2157_CHIPTYPE_SI2141 2
 
+#define SI2158_A20 ('A' << 24 | 58 << 16 | '2' << 8 | '0' << 0)
+#define SI2148_A20 ('A' << 24 | 48 << 16 | '2' << 8 | '0' << 0)
+#define SI2157_A30 ('A' << 24 | 57 << 16 | '3' << 8 | '0' << 0)
+#define SI2147_A30 ('A' << 24 | 47 << 16 | '3' << 8 | '0' << 0)
+#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
+#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
+
 /* firmware command struct */
 #define SI2157_ARGLEN      30
 struct si2157_cmd {
diff --git a/drivers/media/usb/dvb-usb-v2/af9035.c b/drivers/media/usb/dvb-usb-v2/af9035.c
index 80d3bd3a0f24..28b073bfe0d4 100644
--- a/drivers/media/usb/dvb-usb-v2/af9035.c
+++ b/drivers/media/usb/dvb-usb-v2/af9035.c
@@ -1216,8 +1216,51 @@ static int it930x_frontend_attach(struct dvb_usb_adapter *adap)
 	struct si2168_config si2168_config;
 	struct i2c_adapter *adapter;
 
-	dev_dbg(&intf->dev, "adap->id=%d\n", adap->id);
-
+	//dev_dbg(&intf->dev, "adap->id=%d\n", adap->id);
+       dev_dbg(&intf->dev, "%s  adap->id=%d\n", __func__, adap->id);
+
+       /* I2C master bus 2 clock speed 300k */
+       ret = af9035_wr_reg(d, 0x00f6a7, 0x07);
+       if (ret < 0)
+               goto err;
+
+       /* I2C master bus 1,3 clock speed 300k */
+       ret = af9035_wr_reg(d, 0x00f103, 0x07);
+       if (ret < 0)
+               goto err;
+
+       /* set gpio11 low */
+       ret = af9035_wr_reg_mask(d, 0xd8d4, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+
+       ret = af9035_wr_reg_mask(d, 0xd8d5, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+
+       ret = af9035_wr_reg_mask(d, 0xd8d3, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+ 
+       /* Tuner enable using gpiot2_en, gpiot2_on and gpiot2_o (reset) */
+       ret = af9035_wr_reg_mask(d, 0xd8b8, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+
+       ret = af9035_wr_reg_mask(d, 0xd8b9, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+
+       ret = af9035_wr_reg_mask(d, 0xd8b7, 0x00, 0x01);
+       if (ret < 0)
+               goto err;
+
+       msleep(200);
+
+       ret = af9035_wr_reg_mask(d, 0xd8b7, 0x01, 0x01);
+       if (ret < 0)
+               goto err;
+ 
 	memset(&si2168_config, 0, sizeof(si2168_config));
 	si2168_config.i2c_adapter = &adapter;
 	si2168_config.fe = &adap->fe[0];
@@ -2128,6 +2171,8 @@ static const struct usb_device_id af9035_id_table[] = {
 	/* IT930x devices */
 	{ DVB_USB_DEVICE(USB_VID_ITETECH, USB_PID_ITETECH_IT9303,
 		&it930x_props, "ITE 9303 Generic", NULL) },
+        { DVB_USB_DEVICE(USB_VID_DEXATEK, 0x0100,
+                &it930x_props, "Logilink VG0022A", NULL) },
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, af9035_id_table);