V4L/DVB (11951): cx18: Add DVB-T support for the Leadtek WinFast DVR3100 H

This adds support for DVB-T on the Leadtek DVR3100 H and should also get analog
TV capture from the tuner working properly as well.

DVB-T 6 MHz and 8 MHz have been tested and verified to work by Terry Wu of
Leadtek.  DVB-T 7 MHz has also been verified working with a change developed by
Terry to the tuner-xc2028.c driver.

Special thanks go to Terry Wu <terrywu2009@gmail.com> of Leadtek who provided
the needed information and testing to get digital TV working for the Leadtek
DVR3100 H.

Reported-by: Terry Wu <terrywu2009@gmail.com>
Tested-by: Terry Wu <terrywu2009@gmail.com>
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 51 insertions, 2 deletions

diff --git a/drivers/media/video/cx18/cx18-dvb.c b/drivers/media/video/cx18/cx18-dvb.c
index e7285a1096f2..6ea3fe623ef4 100644
--- a/drivers/media/video/cx18/cx18-dvb.c
+++ b/drivers/media/video/cx18/cx18-dvb.c
@@ -26,12 +26,17 @@
 #include "cx18-queue.h"
 #include "cx18-streams.h"
 #include "cx18-cards.h"
+#include "cx18-gpio.h"
 #include "s5h1409.h"
 #include "mxl5005s.h"
+#include "zl10353.h"
+#include "tuner-xc2028.h"
 
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
 #define CX18_REG_DMUX_NUM_PORT_0_CONTROL 0xd5a000
+#define CX18_CLOCK_ENABLE2               0xc71024
+#define CX18_DMUX_CLK_MASK               0x0080
 
 static struct mxl5005s_config hauppauge_hvr1600_tuner = {
         .i2c_address     = 0xC6 >> 1,
@@ -58,7 +63,15 @@ static struct s5h1409_config hauppauge_hvr1600_config = {
         .inversion     = S5H1409_INVERSION_OFF,
         .status_mode   = S5H1409_DEMODLOCKING,
         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
+};
 
+/* Information/confirmation of proper config values provided by Terry Wu */
+static struct zl10353_config leadtek_dvr3100h_demod = {
+        .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
+        .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
+        .parallel_ts           = 1,         /* Not a serial TS */
+        .no_tuner              = 1,         /* XC3028 is not behind the gate */
+        .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 };
 
 static int dvb_register(struct cx18_stream *stream);
@@ -99,6 +112,7 @@ static int cx18_dvb_start_feed(struct dvb_demux_feed *feed)
                 cx18_write_reg(cx, v, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
                 break;
 
+        case CX18_CARD_LEADTEK_DVR3100H:
         default:
                 /* Assumption - Parallel transport - Signalling
                  * undefined or default.
@@ -268,8 +282,7 @@ void cx18_dvb_unregister(struct cx18_stream *stream)
 }
 
 /* All the DVB attach calls go here, this function get's modified
- * for each new card. No other function in this file needs
- * to change.
+ * for each new card. cx18_dvb_start_feed() will also need changes.
  */
 static int dvb_register(struct cx18_stream *stream)
 {
@@ -290,6 +303,29 @@ static int dvb_register(struct cx18_stream *stream)
                         ret = 0;
                 }
                 break;
+        case CX18_CARD_LEADTEK_DVR3100H:
+                dvb->fe = dvb_attach(zl10353_attach,
+                                     &leadtek_dvr3100h_demod,
+                                     &cx->i2c_adap[1]);
+                if (dvb->fe != NULL) {
+                        struct dvb_frontend *fe;
+                        struct xc2028_config cfg = {
+                                .i2c_adap = &cx->i2c_adap[1],
+                                .i2c_addr = 0xc2 >> 1,
+                                .ctrl = NULL,
+                        };
+                        static struct xc2028_ctrl ctrl = {
+                                .fname   = XC2028_DEFAULT_FIRMWARE,
+                                .max_len = 64,
+                                .demod   = XC3028_FE_ZARLINK456,
+                                .type    = XC2028_AUTO,
+                        };
+
+                        fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
+                        if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
+                                fe->ops.tuner_ops.set_config(fe, &ctrl);
+                }
+                break;
         default:
                 /* No Digital Tv Support */
                 break;
@@ -300,6 +336,8 @@ static int dvb_register(struct cx18_stream *stream)
                 return -1;
         }
 
+        dvb->fe->callback = cx18_reset_tuner_gpio;
+
         ret = dvb_register_frontend(&dvb->dvb_adapter, dvb->fe);
         if (ret < 0) {
                 if (dvb->fe->ops.release)
@@ -307,5 +345,16 @@ static int dvb_register(struct cx18_stream *stream)
                 return ret;
         }
 
+        /*
+         * The firmware seems to enable the TS DMUX clock
+         * under various circumstances.  However, since we know we
+         * might use it, let's just turn it on ourselves here.
+         */
+        cx18_write_reg_expect(cx,
+                              (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK,
+                              CX18_CLOCK_ENABLE2,
+                              CX18_DMUX_CLK_MASK,
+                              (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK);
+
         return ret;
 }