media: rtl28xxu: add support for Sony CXD2837ER slave demod

Since 2018 some new revisions of RTL2832P based devices having
Sony CXD2837ER as a slave demodulator instead of Panasonic MN88473.
CXD2837ER handled in DVB_CXD2841ER module but it's has a lack of control.
So slave demod has to be reseted by GPIO0 before detecting to woke up
CXD2837ER.

Signed-off-by: Nikita Gerasimov <nikitych@yandex.ru>
Cc: Antti Palosaari <crope@iki.fi>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/usb/dvb-usb-v2/Kconfig b/drivers/media/usb/dvb-usb-v2/Kconfig
index df44122..511e3f2 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/Kconfig
+++ b/drivers/media/usb/dvb-usb-v2/Kconfig
@@ -133,6 +133,7 @@ config DVB_USB_RTL28XXU
        depends on DVB_USB_V2 && I2C_MUX
        select DVB_MN88472 if MEDIA_SUBDRV_AUTOSELECT
        select DVB_MN88473 if MEDIA_SUBDRV_AUTOSELECT
+       select DVB_CXD2841ER if MEDIA_SUBDRV_AUTOSELECT
        select DVB_RTL2830
        select DVB_RTL2832
        select DVB_RTL2832_SDR if (MEDIA_SUBDRV_AUTOSELECT && MEDIA_SDR_SUPPORT)

diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 8a83b10..d0075cb 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -384,6 +384,7 @@ static int rtl2832u_read_config(struct dvb_usb_device *d)
        struct rtl28xxu_req req_r828d = {0x0074, CMD_I2C_RD, 1, buf};
        struct rtl28xxu_req req_mn88472 = {0xff38, CMD_I2C_RD, 1, buf};
        struct rtl28xxu_req req_mn88473 = {0xff38, CMD_I2C_RD, 1, buf};
+       struct rtl28xxu_req req_cxd2837er = {0xfdd8, CMD_I2C_RD, 1, buf};
        struct rtl28xxu_req req_si2157 = {0x00c0, CMD_I2C_RD, 1, buf};
        struct rtl28xxu_req req_si2168 = {0x00c8, CMD_I2C_RD, 1, buf};
 
@@ -540,7 +541,18 @@ tuner_found:
 
        /* probe slave demod */
        if (dev->tuner == TUNER_RTL2832_R828D) {
-               /* power on MN88472 demod on GPIO0 */
+               /* power off slave demod on GPIO0 to reset CXD2837ER */
+               ret = rtl28xxu_wr_reg_mask(d, SYS_GPIO_OUT_VAL, 0x00, 0x01);
+               if (ret)
+                       goto err;
+
+               ret = rtl28xxu_wr_reg_mask(d, SYS_GPIO_OUT_EN, 0x00, 0x01);
+               if (ret)
+                       goto err;
+
+               msleep(50);
+
+               /* power on slave demod on GPIO0 */
                ret = rtl28xxu_wr_reg_mask(d, SYS_GPIO_OUT_VAL, 0x01, 0x01);
                if (ret)
                        goto err;
@@ -553,7 +565,7 @@ tuner_found:
                if (ret)
                        goto err;
 
-               /* check MN88472 answers */
+               /* check slave answers */
                ret = rtl28xxu_ctrl_msg(d, &req_mn88472);
                if (ret == 0 && buf[0] == 0x02) {
                        dev_dbg(&d->intf->dev, "MN88472 found\n");
@@ -567,6 +579,13 @@ tuner_found:
                        dev->slave_demod = SLAVE_DEMOD_MN88473;
                        goto demod_found;
                }
+
+               ret = rtl28xxu_ctrl_msg(d, &req_cxd2837er);
+               if (ret == 0 && buf[0] == 0xb1) {
+                       dev_dbg(&d->intf->dev, "CXD2837ER found\n");
+                       dev->slave_demod = SLAVE_DEMOD_CXD2837ER;
+                       goto demod_found;
+               }
        }
        if (dev->tuner == TUNER_RTL2832_SI2157) {
                /* check Si2168 ID register; reg=c8 val=80 */
@@ -989,6 +1008,23 @@ static int rtl2832u_frontend_attach(struct dvb_usb_adapter *adap)
                        }
 
                        dev->i2c_client_slave_demod = client;
+               } else if (dev->slave_demod == SLAVE_DEMOD_CXD2837ER) {
+                       struct cxd2841er_config cxd2837er_config = {};
+
+                       cxd2837er_config.i2c_addr = 0xd8;
+                       cxd2837er_config.xtal = SONY_XTAL_20500;
+                       cxd2837er_config.flags = (CXD2841ER_AUTO_IFHZ |
+                               CXD2841ER_NO_AGCNEG | CXD2841ER_TSBITS |
+                               CXD2841ER_EARLY_TUNE | CXD2841ER_TS_SERIAL);
+                       adap->fe[1] = dvb_attach(cxd2841er_attach_t_c,
+                                                &cxd2837er_config,
+                                                &d->i2c_adap);
+                       if (!adap->fe[1]) {
+                               dev->slave_demod = SLAVE_DEMOD_NONE;
+                               goto err_slave_demod_failed;
+                       }
+                       adap->fe[1]->id = 1;
+                       dev->i2c_client_slave_demod = NULL;
                } else {
                        struct si2168_config si2168_config = {};
                        struct i2c_adapter *adapter;

diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
index 1380629..197f4e3 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
@@ -31,6 +31,7 @@
 #include "rtl2832_sdr.h"
 #include "mn88472.h"
 #include "mn88473.h"
+#include "cxd2841er.h"
 
 #include "qt1010.h"
 #include "mt2060.h"
@@ -87,7 +88,8 @@ struct rtl28xxu_dev {
        #define SLAVE_DEMOD_MN88472        1
        #define SLAVE_DEMOD_MN88473        2
        #define SLAVE_DEMOD_SI2168         3
-       unsigned int slave_demod:2;
+       #define SLAVE_DEMOD_CXD2837ER      4
+       unsigned int slave_demod:3;
        union {
                struct rtl2830_platform_data rtl2830_platform_data;
                struct rtl2832_platform_data rtl2832_platform_data;