media: em28xx: Add support for Hauppauge USB QuadHD

Hauppauge USB QuadHD contains two two-tuner em28xx
devices behind a usb hub. Each of the four dvb adapters
contains a MaxLinear 692 combo ATSC demod/tuner.

Bus 003 Device 006: ID 2040:846d Hauppauge
Bus 003 Device 005: ID 2040:846d Hauppauge
Bus 003 Device 004: ID 04e2:0404 Exar Corp.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/usb/em28xx/Kconfig

@@ -67,6 +67,7 @@ config VIDEO_EM28XX_DVB
 	select MEDIA_TUNER_XC2028 if MEDIA_SUBDRV_AUTOSELECT
 	select MEDIA_TUNER_XC5000 if MEDIA_SUBDRV_AUTOSELECT
 	select MEDIA_TUNER_MT2060 if MEDIA_SUBDRV_AUTOSELECT
+	select DVB_MXL692 if MEDIA_SUBDRV_AUTOSELECT
 	help
 	  This adds support for DVB cards based on the
 	  Empiatech em28xx chips.

drivers/media/usb/em28xx/em28xx-cards.c

@@ -549,6 +549,21 @@ static const struct em28xx_reg_seq hauppauge_dualhd_dvb[] = {
 	{-1,                             -1,   -1,     -1},
 };
 
+/* Hauppauge USB QuadHD */
+static struct em28xx_reg_seq hauppauge_usb_quadhd_atsc_reg_seq[] = {
+	{EM2874_R80_GPIO_P0_CTRL,      0xff, 0xff,      0},
+	{0x0d,                         0xff, 0xff,    200},
+	{0x50,                         0x04, 0xff,    300},
+	{EM2874_R80_GPIO_P0_CTRL,      0xb0, 0xf0,    100}, /* demod 1 reset */
+	{EM2874_R80_GPIO_P0_CTRL,      0xf0, 0xf0,    100},
+	{EM2874_R80_GPIO_P0_CTRL,      0xd0, 0xf0,    100}, /* demod 2 reset */
+	{EM2874_R80_GPIO_P0_CTRL,      0xf0, 0xf0,    100},
+	{EM2874_R5F_TS_ENABLE,         0x44, 0xff,     50},
+	{EM2874_R5D_TS1_PKT_SIZE,      0x05, 0xff,     50},
+	{EM2874_R5E_TS2_PKT_SIZE,      0x05, 0xff,     50},
+	{-1,                           -1,   -1,       -1},
+};
+
 /*
  *  Button definitions
  */
@@ -644,6 +659,22 @@ static struct em28xx_led hauppauge_dualhd_leds[] = {
 	{-1, 0, 0, 0},
 };
 
+static struct em28xx_led hauppauge_usb_quadhd_leds[] = {
+	{
+		.role      = EM28XX_LED_DIGITAL_CAPTURING,
+		.gpio_reg  = EM2874_R80_GPIO_P0_CTRL,
+		.gpio_mask = EM_GPIO_2,
+		.inverted  = 1,
+	},
+	{
+		.role      = EM28XX_LED_DIGITAL_CAPTURING_TS2,
+		.gpio_reg  = EM2874_R80_GPIO_P0_CTRL,
+		.gpio_mask = EM_GPIO_0,
+		.inverted  = 1,
+	},
+	{-1, 0, 0, 0},
+};
+
 /*
  *  Board definitions
  */
@@ -2539,6 +2570,19 @@ const struct em28xx_board em28xx_boards[] = {
 			.amux     = EM28XX_AMUX_LINE_IN,
 		} },
 	},
+	/* 2040:826d Hauppauge USB QuadHD
+	 * Empia 28274, Max Linear 692 ATSC combo demod/tuner
+	 */
+	[EM2874_BOARD_HAUPPAUGE_USB_QUADHD] = {
+		.name          = "Hauppauge USB QuadHD ATSC",
+		.def_i2c_bus   = 1,
+		.has_dual_ts   = 1,
+		.has_dvb       = 1,
+		.i2c_speed     = EM28XX_I2C_CLK_WAIT_ENABLE | EM28XX_I2C_FREQ_100_KHZ,
+		.tuner_type    = TUNER_ABSENT,
+		.tuner_gpio    = hauppauge_usb_quadhd_atsc_reg_seq,
+		.leds          = hauppauge_usb_quadhd_leds,
+	},
 };
 EXPORT_SYMBOL_GPL(em28xx_boards);
 
@@ -2672,6 +2716,8 @@ struct usb_device_id em28xx_id_table[] = {
 			.driver_info = EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_01595 },
 	{ USB_DEVICE(0x2040, 0x826d),
 			.driver_info = EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_01595 },
+	{ USB_DEVICE(0x2040, 0x846d),
+			.driver_info = EM2874_BOARD_HAUPPAUGE_USB_QUADHD },
 	{ USB_DEVICE(0x0438, 0xb002),
 			.driver_info = EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600 },
 	{ USB_DEVICE(0x2001, 0xf112),

drivers/media/usb/em28xx/em28xx-dvb.c

@@ -62,6 +62,7 @@
 #include "si2157.h"
 #include "tc90522.h"
 #include "qm1d1c0042.h"
+#include "mxl692.h"
 
 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
 MODULE_LICENSE("GPL v2");
@@ -1459,6 +1460,26 @@ static int em28174_dvb_init_hauppauge_wintv_dualhd_01595(struct em28xx *dev)
 	return 0;
 }
 
+static int em2874_dvb_init_hauppauge_usb_quadhd(struct em28xx *dev)
+{
+	struct em28xx_dvb *dvb = dev->dvb;
+	struct mxl692_config mxl692_config = {};
+	unsigned char addr;
+
+	/* attach demod/tuner combo */
+	mxl692_config.id = (dev->ts == PRIMARY_TS) ? 0 : 1;
+	mxl692_config.fe = &dvb->fe[0];
+	addr = (dev->ts == PRIMARY_TS) ? 0x60 : 0x63;
+
+	dvb->i2c_client_demod = dvb_module_probe("mxl692", NULL,
+						 &dev->i2c_adap[dev->def_i2c_bus],
+						 addr, &mxl692_config);
+	if (!dvb->i2c_client_demod)
+		return -ENODEV;
+
+	return 0;
+}
+
 static int em28xx_dvb_init(struct em28xx *dev)
 {
 	int result = 0, dvb_alt = 0;
@@ -1945,6 +1966,11 @@ static int em28xx_dvb_init(struct em28xx *dev)
 		if (result)
 			goto out_free;
 		break;
+	case EM2874_BOARD_HAUPPAUGE_USB_QUADHD:
+		result = em2874_dvb_init_hauppauge_usb_quadhd(dev);
+		if (result)
+			goto out_free;
+		break;
 	default:
 		dev_err(&dev->intf->dev,
 			"The frontend of your DVB/ATSC card isn't supported yet\n");

drivers/media/usb/em28xx/em28xx.h

@@ -152,6 +152,7 @@
 #define EM2861_BOARD_MAGIX_VIDEOWANDLER2          103
 #define EM28178_BOARD_PCTV_461E_V2                104
 #define EM2860_BOARD_MYGICA_IGRABBER              105
+#define EM2874_BOARD_HAUPPAUGE_USB_QUADHD         106
 
 /* Limits minimum and default number of buffers */
 #define EM28XX_MIN_BUF 4