V4L/DVB (9055): tuner-xc2028: Do a better job selecting firmware type

Firmware selection is very tricky on this device. This patch do a better
selection of the proper firmware type, by using a code to hint if the
firmware to be loaded should be D2620 or D2633.

It also allows overriding the hint at the control structure.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 33 insertions, 11 deletions

diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c
index fc82d154c8c2..b65e6803e6c6 100644
--- a/drivers/media/common/tuners/tuner-xc2028.c
+++ b/drivers/media/common/tuners/tuner-xc2028.c
@@ -1013,11 +1013,6 @@ static int xc2028_set_params(struct dvb_frontend *fe,
 
         tuner_dbg("%s called\n", __func__);
 
-        if (priv->ctrl.d2633)
-                type |= D2633;
-        else
-                type |= D2620;
-
         switch(fe->ops.info.type) {
         case FE_OFDM:
                 bw = p->u.ofdm.bandwidth;
@@ -1032,10 +1027,8 @@ static int xc2028_set_params(struct dvb_frontend *fe,
                 break;
         case FE_ATSC:
                 bw = BANDWIDTH_6_MHZ;
-                /* The only ATSC firmware (at least on v2.7) is D2633,
-                   so overrides ctrl->d2633 */
-                type |= ATSC| D2633;
-                type &= ~D2620;
+                /* The only ATSC firmware (at least on v2.7) is D2633 */
+                type |= ATSC | D2633;
                 break;
         /* DVB-S is not supported */
         default:
@@ -1068,6 +1061,28 @@ static int xc2028_set_params(struct dvb_frontend *fe,
                 tuner_err("error: bandwidth not supported.\n");
         };
 
+        /*
+          Selects between D2633 or D2620 firmware.
+          It doesn't make sense for ATSC, since it should be D2633 on all cases
+         */
+        if (fe->ops.info.type != FE_ATSC) {
+                switch (priv->ctrl.type) {
+                case XC2028_D2633:
+                        type |= D2633;
+                        break;
+                case XC2028_D2620:
+                        type |= D2620;
+                        break;
+                case XC2028_AUTO:
+                default:
+                        /* Zarlink seems to need D2633 */
+                        if (priv->ctrl.demod == XC3028_FE_ZARLINK456)
+                                type |= D2633;
+                        else
+                                type |= D2620;
+                }
+        }
+
         /* All S-code tables need a 200kHz shift */
         if (priv->ctrl.demod)
                 demod = priv->ctrl.demod + 200;
diff --git a/drivers/media/common/tuners/tuner-xc2028.h b/drivers/media/common/tuners/tuner-xc2028.h
index 1af69f49f8e1..19de7928a74e 100644
--- a/drivers/media/common/tuners/tuner-xc2028.h
+++ b/drivers/media/common/tuners/tuner-xc2028.h
@@ -24,16 +24,22 @@
 #define XC3028_FE_ZARLINK456    4560
 #define XC3028_FE_CHINA         5200
 
+enum firmware_type {
+        XC2028_AUTO = 0,        /* By default, auto-detects */
+        XC2028_D2633,
+        XC2028_D2620,
+};
+
 struct xc2028_ctrl {
         char                    *fname;
         int                     max_len;
         unsigned int            scode_table;
         unsigned int            mts   :1;
-        unsigned int            d2633 :1;
         unsigned int            input1:1;
         unsigned int            vhfbw7:1;
         unsigned int            uhfbw8:1;
         unsigned int            demod;
+        enum firmware_type      type:2;
 };
 
 struct xc2028_config {
diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 6c5475d7d321..24bd18327aa0 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -444,7 +444,8 @@ static int dvb_register(struct cx23885_tsport *port)
                                 .fname   = XC3028L_DEFAULT_FIRMWARE,
                                 .max_len = 64,
                                 .demod   = 5000,
-                                .d2633   = 1
+                                /* This is true for all demods with v36 firmware? */
+                                .type    = XC2028_D2633,
                         };
 
                         fe = dvb_attach(xc2028_attach,