V4L/DVB (7633): au8522: consolidate mse2snr_lookup functions

consolidate au8522_qam256_mse2snr_lookup, au8522_qam64_mse2snr_lookup and
au8522_vsb_mse2snr_lookup into a single function, au8522_mse2snr_lookup.

Pass the mse2snr table into au8522_mse2snr_lookup depending on the
modulation type.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/dvb/frontends/au8522.c b/drivers/media/dvb/frontends/au8522.c
index fa3e6ab..394fb90 100644 (file)
--- a/drivers/media/dvb/frontends/au8522.c
+++ b/drivers/media/dvb/frontends/au8522.c
@@ -96,11 +96,13 @@ static int au8522_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
                return au8522_writereg(state, 0x106, 0);
 }
 
-/* VSB SNR lookup table */
-static struct {
+struct mse2snr_tab {
        u16 val;
        u16 data;
-} vsb_mse2snr_tab[] = {
+};
+
+/* VSB SNR lookup table */
+static struct mse2snr_tab vsb_mse2snr_tab[] = {
        {   0, 270 },
        {   2, 250 },
        {   3, 240 },
@@ -134,10 +136,7 @@ static struct {
 };
 
 /* QAM64 SNR lookup table */
-static struct {
-       u16 val;
-       u16 data;
-} qam64_mse2snr_tab[] = {
+static struct mse2snr_tab qam64_mse2snr_tab[] = {
        {  15,   0 },
        {  16, 290 },
        {  17, 288 },
@@ -218,10 +217,7 @@ static struct {
 };
 
 /* QAM256 SNR lookup table */
-static struct {
-       u16 val;
-       u16 data;
-} qam256_mse2snr_tab[] = {
+static struct mse2snr_tab qam256_mse2snr_tab[] = {
        {  16,   0 },
        {  17, 400 },
        {  18, 398 },
@@ -288,46 +284,14 @@ static struct {
        { 256, 280 },
 };
 
-static int au8522_vsb_mse2snr_lookup(int mse, u16 *snr)
-{
-       int i, ret = -EINVAL;
-       dprintk("%s()\n", __func__);
-
-       for (i = 0; i < ARRAY_SIZE(vsb_mse2snr_tab); i++) {
-               if (mse < vsb_mse2snr_tab[i].val) {
-                       *snr = vsb_mse2snr_tab[i].data;
-                       ret = 0;
-                       break;
-               }
-       }
-       dprintk("%s() snr=%d\n", __func__, *snr);
-       return ret;
-}
-
-static int au8522_qam64_mse2snr_lookup(int mse, u16 *snr)
-{
-       int i, ret = -EINVAL;
-       dprintk("%s()\n", __func__);
-
-       for (i = 0; i < ARRAY_SIZE(qam64_mse2snr_tab); i++) {
-               if (mse < qam64_mse2snr_tab[i].val) {
-                       *snr = qam64_mse2snr_tab[i].data;
-                       ret = 0;
-                       break;
-               }
-       }
-       dprintk("%s() snr=%d\n", __func__, *snr);
-       return ret;
-}
-
-static int au8522_qam256_mse2snr_lookup(int mse, u16 *snr)
+static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, u16 *snr)
 {
        int i, ret = -EINVAL;
        dprintk("%s()\n", __func__);
 
-       for (i = 0; i < ARRAY_SIZE(qam256_mse2snr_tab); i++) {
-               if (mse < qam256_mse2snr_tab[i].val) {
-                       *snr = qam256_mse2snr_tab[i].data;
+       for (i = 0; i < sz; i++) {
+               if (mse < tab[i].val) {
+                       *snr = tab[i].data;
                        ret = 0;
                        break;
                }
@@ -588,14 +552,20 @@ static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr)
        dprintk("%s()\n", __func__);
 
        if (state->current_modulation == QAM_256)
-               ret = au8522_qam256_mse2snr_lookup(
-                       au8522_readreg(state, 0x4522), snr);
+               ret = au8522_mse2snr_lookup(qam256_mse2snr_tab,
+                                           ARRAY_SIZE(qam256_mse2snr_tab),
+                                           au8522_readreg(state, 0x4522),
+                                           snr);
        else if (state->current_modulation == QAM_64)
-               ret = au8522_qam64_mse2snr_lookup(
-                       au8522_readreg(state, 0x4522), snr);
+               ret = au8522_mse2snr_lookup(qam64_mse2snr_tab,
+                                           ARRAY_SIZE(qam64_mse2snr_tab),
+                                           au8522_readreg(state, 0x4522),
+                                           snr);
        else /* VSB_8 */
-               ret = au8522_vsb_mse2snr_lookup(
-                       au8522_readreg(state, 0x4311), snr);
+               ret = au8522_mse2snr_lookup(vsb_mse2snr_tab,
+                                           ARRAY_SIZE(vsb_mse2snr_tab),
+                                           au8522_readreg(state, 0x4311),
+                                           snr);
 
        return ret;
 }