[media] rtl28xxu: add support for Rafael Micro r820t

This tuner is used on some rtl2882 dongles. Add it to the driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>

3 files changed, 32 insertions, 0 deletions

diff --git a/drivers/media/usb/dvb-usb-v2/Kconfig b/drivers/media/usb/dvb-usb-v2/Kconfig
index 9aff03555464..a3c8ecf22078 100644
--- a/drivers/media/usb/dvb-usb-v2/Kconfig
+++ b/drivers/media/usb/dvb-usb-v2/Kconfig
@@ -143,6 +143,7 @@ config DVB_USB_RTL28XXU
         select MEDIA_TUNER_FC0013 if MEDIA_SUBDRV_AUTOSELECT
         select MEDIA_TUNER_E4000 if MEDIA_SUBDRV_AUTOSELECT
         select MEDIA_TUNER_FC2580 if MEDIA_SUBDRV_AUTOSELECT
+        select MEDIA_TUNER_R820T if MEDIA_SUBDRV_AUTOSELECT
         help
           Say Y here to support the Realtek RTL28xxU DVB USB receiver.
 
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 3d128a5e4794..18756a6d03d5 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -33,6 +33,7 @@
 #include "e4000.h"
 #include "fc2580.h"
 #include "tua9001.h"
+#include "r820t.h"
 
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
@@ -375,6 +376,7 @@ static int rtl2832u_read_config(struct dvb_usb_device *d)
         struct rtl28xxu_req req_mxl5007t = {0xd9c0, CMD_I2C_RD, 1, buf};
         struct rtl28xxu_req req_e4000 = {0x02c8, CMD_I2C_RD, 1, buf};
         struct rtl28xxu_req req_tda18272 = {0x00c0, CMD_I2C_RD, 2, buf};
+        struct rtl28xxu_req req_r820t = {0x0034, CMD_I2C_RD, 5, buf};
 
         dev_dbg(&d->udev->dev, "%s:\n", __func__);
 
@@ -479,6 +481,14 @@ static int rtl2832u_read_config(struct dvb_usb_device *d)
                 goto found;
         }
 
+        /* check R820T by reading tuner stats at I2C addr 0x1a */
+        ret = rtl28xxu_ctrl_msg(d, &req_r820t);
+        if (ret == 0) {
+                priv->tuner = TUNER_RTL2832_R820T;
+                priv->tuner_name = "R820T";
+                goto found;
+        }
+
 found:
         dev_dbg(&d->udev->dev, "%s: tuner=%s\n", __func__, priv->tuner_name);
 
@@ -589,6 +599,12 @@ static struct rtl2832_config rtl28xxu_rtl2832_e4000_config = {
         .tuner = TUNER_RTL2832_E4000,
 };
 
+static struct rtl2832_config rtl28xxu_rtl2832_r820t_config = {
+        .i2c_addr = 0x10,
+        .xtal = 28800000,
+        .tuner = TUNER_RTL2832_R820T,
+};
+
 static int rtl2832u_fc0012_tuner_callback(struct dvb_usb_device *d,
                 int cmd, int arg)
 {
@@ -728,6 +744,9 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
         case TUNER_RTL2832_E4000:
                 rtl2832_config = &rtl28xxu_rtl2832_e4000_config;
                 break;
+        case TUNER_RTL2832_R820T:
+                rtl2832_config = &rtl28xxu_rtl2832_r820t_config;
+                break;
         default:
                 dev_err(&d->udev->dev, "%s: unknown tuner=%s\n",
                                 KBUILD_MODNAME, priv->tuner_name);
@@ -840,6 +859,13 @@ static const struct fc0012_config rtl2832u_fc0012_config = {
         .xtal_freq = FC_XTAL_28_8_MHZ,
 };
 
+static const struct r820t_config rtl2832u_r820t_config = {
+        .i2c_addr = 0x1a,
+        .xtal = 28800000,
+        .max_i2c_msg_len = 2,
+        .rafael_chip = CHIP_R820T,
+};
+
 static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
 {
         int ret;
@@ -889,6 +915,10 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
                 fe = dvb_attach(tua9001_attach, adap->fe[0], &d->i2c_adap,
                                 &rtl2832u_tua9001_config);
                 break;
+        case TUNER_RTL2832_R820T:
+                fe = dvb_attach(r820t_attach, adap->fe[0], &d->i2c_adap,
+                                &rtl2832u_r820t_config);
+                break;
         default:
                 fe = NULL;
                 dev_err(&d->udev->dev, "%s: unknown tuner=%d\n", KBUILD_MODNAME,
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
index 2f3af2d3b6ce..533a33127289 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
@@ -82,6 +82,7 @@ enum rtl28xxu_tuner {
         TUNER_RTL2832_E4000,
         TUNER_RTL2832_TDA18272,
         TUNER_RTL2832_FC0013,
+        TUNER_RTL2832_R820T,
 };
 
 struct rtl28xxu_req {