[media] si2165: Prepare si2165_set_frontend() for future DVB-C support

The current si2165_set_frontend() function actually works only for DVB-T.
Split it into two functions, preparing the code to support DVB-C.

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/dvb-frontends/si2165.c b/drivers/media/dvb-frontends/si2165.c
index a0e6ad8a10f106e8ce6d2ce67775b9345b1c7091..4e3acd40733dbe239c7b24ec4364d77fc90aac12 100644 (file)
--- a/drivers/media/dvb-frontends/si2165.c
+++ b/drivers/media/dvb-frontends/si2165.c
@@ -760,7 +760,7 @@ static int si2165_set_oversamp(struct si2165_state *state, u32 dvb_rate)
        do_div(oversamp, dvb_rate);
        reg_value = oversamp & 0x3fffffff;
 
-       /* oversamp, usbdump contained 0x03100000; */
+       dprintk("%s: Write oversamp=%#x\n", __func__, reg_value);
        return si2165_writereg32(state, 0x00e4, reg_value);
 }
 
@@ -795,14 +795,6 @@ static int si2165_set_if_freq_shift(struct si2165_state *state)
        return si2165_writereg32(state, 0x00e8, reg_value);
 }
 
-static const struct si2165_reg_value_pair agc_rewrite[] = {
-       { 0x012a, 0x46 },
-       { 0x012c, 0x00 },
-       { 0x012e, 0x0a },
-       { 0x012f, 0xff },
-       { 0x0123, 0x70 }
-};
-
 static const struct si2165_reg_value_pair dvbt_regs[] = {
        /* standard = DVB-T */
        { 0x00ec, 0x01 },
@@ -826,12 +818,11 @@ static const struct si2165_reg_value_pair dvbt_regs[] = {
        { 0x0387, 0x00 }
 };
 
-static int si2165_set_frontend(struct dvb_frontend *fe)
+static int si2165_set_frontend_dvbt(struct dvb_frontend *fe)
 {
        int ret;
        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
        struct si2165_state *state = fe->demodulator_priv;
-       u8 val[3];
        u32 dvb_rate = 0;
        u16 bw10k;
 
@@ -852,9 +843,6 @@ static int si2165_set_frontend(struct dvb_frontend *fe)
        if (ret < 0)
                return ret;
 
-       ret = si2165_set_if_freq_shift(state);
-       if (ret < 0)
-               return ret;
        /* bandwidth in 10KHz steps */
        ret = si2165_writereg16(state, 0x0308, bw10k);
        if (ret < 0)
@@ -867,6 +855,40 @@ static int si2165_set_frontend(struct dvb_frontend *fe)
        if (ret < 0)
                return ret;
 
+       return 0;
+}
+
+static const struct si2165_reg_value_pair agc_rewrite[] = {
+       { 0x012a, 0x46 },
+       { 0x012c, 0x00 },
+       { 0x012e, 0x0a },
+       { 0x012f, 0xff },
+       { 0x0123, 0x70 }
+};
+
+static int si2165_set_frontend(struct dvb_frontend *fe)
+{
+       struct si2165_state *state = fe->demodulator_priv;
+       struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+       u32 delsys = p->delivery_system;
+       int ret;
+       u8 val[3];
+
+       /* initial setting of if freq shift */
+       ret = si2165_set_if_freq_shift(state);
+       if (ret < 0)
+               return ret;
+
+       switch (delsys) {
+       case SYS_DVBT:
+               ret = si2165_set_frontend_dvbt(fe);
+               if (ret < 0)
+                       return ret;
+               break;
+       default:
+               return -EINVAL;
+       }
+
        /* dsp_addr_jump */
        ret = si2165_writereg32(state, 0x0348, 0xf4000000);
        if (ret < 0)
@@ -887,6 +909,7 @@ static int si2165_set_frontend(struct dvb_frontend *fe)
        ret = si2165_writereg8(state, 0x0341, 0x00);
        if (ret < 0)
                return ret;
+
        /* reset all */
        ret = si2165_writereg8(state, 0x00c0, 0x00);
        if (ret < 0)