V4L/DVB: af9013: optimize code size

Optimize af9013_set_coeff(). Move configuration values to own table.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/af9013.c

@@ -220,173 +220,50 @@ static u32 af913_div(u32 a, u32 b, u32 x)
 
 static int af9013_set_coeff(struct af9013_state *state, fe_bandwidth_t bw)
 {
-	int ret = 0;
-	u8 i = 0;
+	int ret, i, found;
 	u8 buf[24];
-	u32 uninitialized_var(ns_coeff1_2048nu);
-	u32 uninitialized_var(ns_coeff1_8191nu);
-	u32 uninitialized_var(ns_coeff1_8192nu);
-	u32 uninitialized_var(ns_coeff1_8193nu);
-	u32 uninitialized_var(ns_coeff2_2k);
-	u32 uninitialized_var(ns_coeff2_8k);
-
 	deb_info("%s: adc_clock:%d bw:%d\n", __func__,
 		state->config.adc_clock, bw);
 
-	switch (state->config.adc_clock) {
-	case 28800: /* 28.800 MHz */
-		switch (bw) {
-		case BANDWIDTH_6_MHZ:
-			ns_coeff1_2048nu = 0x01e79e7a;
-			ns_coeff1_8191nu = 0x0079eb6e;
-			ns_coeff1_8192nu = 0x0079e79e;
-			ns_coeff1_8193nu = 0x0079e3cf;
-			ns_coeff2_2k     = 0x00f3cf3d;
-			ns_coeff2_8k     = 0x003cf3cf;
-			break;
-		case BANDWIDTH_7_MHZ:
-			ns_coeff1_2048nu = 0x0238e38e;
-			ns_coeff1_8191nu = 0x008e3d55;
-			ns_coeff1_8192nu = 0x008e38e4;
-			ns_coeff1_8193nu = 0x008e3472;
-			ns_coeff2_2k     = 0x011c71c7;
-			ns_coeff2_8k     = 0x00471c72;
-			break;
-		case BANDWIDTH_8_MHZ:
-			ns_coeff1_2048nu = 0x028a28a3;
-			ns_coeff1_8191nu = 0x00a28f3d;
-			ns_coeff1_8192nu = 0x00a28a29;
-			ns_coeff1_8193nu = 0x00a28514;
-			ns_coeff2_2k     = 0x01451451;
-			ns_coeff2_8k     = 0x00514514;
-			break;
-		default:
-			ret = -EINVAL;
-		}
-		break;
-	case 20480: /* 20.480 MHz */
-		switch (bw) {
-		case BANDWIDTH_6_MHZ:
-			ns_coeff1_2048nu = 0x02adb6dc;
-			ns_coeff1_8191nu = 0x00ab7313;
-			ns_coeff1_8192nu = 0x00ab6db7;
-			ns_coeff1_8193nu = 0x00ab685c;
-			ns_coeff2_2k     = 0x0156db6e;
-			ns_coeff2_8k     = 0x0055b6dc;
-			break;
-		case BANDWIDTH_7_MHZ:
-			ns_coeff1_2048nu = 0x03200001;
-			ns_coeff1_8191nu = 0x00c80640;
-			ns_coeff1_8192nu = 0x00c80000;
-			ns_coeff1_8193nu = 0x00c7f9c0;
-			ns_coeff2_2k     = 0x01900000;
-			ns_coeff2_8k     = 0x00640000;
-			break;
-		case BANDWIDTH_8_MHZ:
-			ns_coeff1_2048nu = 0x03924926;
-			ns_coeff1_8191nu = 0x00e4996e;
-			ns_coeff1_8192nu = 0x00e49249;
-			ns_coeff1_8193nu = 0x00e48b25;
-			ns_coeff2_2k     = 0x01c92493;
-			ns_coeff2_8k     = 0x00724925;
-			break;
-		default:
-			ret = -EINVAL;
-		}
-		break;
-	case 28000: /* 28.000 MHz */
-		switch (bw) {
-		case BANDWIDTH_6_MHZ:
-			ns_coeff1_2048nu = 0x01f58d10;
-			ns_coeff1_8191nu = 0x007d672f;
-			ns_coeff1_8192nu = 0x007d6344;
-			ns_coeff1_8193nu = 0x007d5f59;
-			ns_coeff2_2k     = 0x00fac688;
-			ns_coeff2_8k     = 0x003eb1a2;
-			break;
-		case BANDWIDTH_7_MHZ:
-			ns_coeff1_2048nu = 0x02492492;
-			ns_coeff1_8191nu = 0x00924db7;
-			ns_coeff1_8192nu = 0x00924925;
-			ns_coeff1_8193nu = 0x00924492;
-			ns_coeff2_2k     = 0x01249249;
-			ns_coeff2_8k     = 0x00492492;
+	/* lookup coeff from table */
+	for (i = 0, found = 0; i < ARRAY_SIZE(coeff_table); i++) {
+		if (coeff_table[i].adc_clock == state->config.adc_clock &&
+			coeff_table[i].bw == bw) {
+			found = 1;
 			break;
-		case BANDWIDTH_8_MHZ:
-			ns_coeff1_2048nu = 0x029cbc15;
-			ns_coeff1_8191nu = 0x00a7343f;
-			ns_coeff1_8192nu = 0x00a72f05;
-			ns_coeff1_8193nu = 0x00a729cc;
-			ns_coeff2_2k     = 0x014e5e0a;
-			ns_coeff2_8k     = 0x00539783;
-			break;
-		default:
-			ret = -EINVAL;
-		}
-		break;
-	case 25000: /* 25.000 MHz */
-		switch (bw) {
-		case BANDWIDTH_6_MHZ:
-			ns_coeff1_2048nu = 0x0231bcb5;
-			ns_coeff1_8191nu = 0x008c7391;
-			ns_coeff1_8192nu = 0x008c6f2d;
-			ns_coeff1_8193nu = 0x008c6aca;
-			ns_coeff2_2k     = 0x0118de5b;
-			ns_coeff2_8k     = 0x00463797;
-			break;
-		case BANDWIDTH_7_MHZ:
-			ns_coeff1_2048nu = 0x028f5c29;
-			ns_coeff1_8191nu = 0x00a3dc29;
-			ns_coeff1_8192nu = 0x00a3d70a;
-			ns_coeff1_8193nu = 0x00a3d1ec;
-			ns_coeff2_2k     = 0x0147ae14;
-			ns_coeff2_8k     = 0x0051eb85;
-			break;
-		case BANDWIDTH_8_MHZ:
-			ns_coeff1_2048nu = 0x02ecfb9d;
-			ns_coeff1_8191nu = 0x00bb44c1;
-			ns_coeff1_8192nu = 0x00bb3ee7;
-			ns_coeff1_8193nu = 0x00bb390d;
-			ns_coeff2_2k     = 0x01767dce;
-			ns_coeff2_8k     = 0x005d9f74;
-			break;
-		default:
-			ret = -EINVAL;
 		}
-		break;
-	default:
-		err("invalid xtal");
-		return -EINVAL;
 	}
-	if (ret) {
-		err("invalid bandwidth");
-		return ret;
+
+	if (!found) {
+		err("invalid bw or clock");
+		ret = -EINVAL;
+		goto error;
 	}
 
-	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x03000000) >> 24);
-	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x00ff0000) >> 16);
-	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x0000ff00) >> 8);
-	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x000000ff));
-	buf[i++] = (u8) ((ns_coeff2_2k     & 0x01c00000) >> 22);
-	buf[i++] = (u8) ((ns_coeff2_2k     & 0x003fc000) >> 14);
-	buf[i++] = (u8) ((ns_coeff2_2k     & 0x00003fc0) >> 6);
-	buf[i++] = (u8) ((ns_coeff2_2k     & 0x0000003f));
-	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x03000000) >> 24);
-	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x00ffc000) >> 16);
-	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x0000ff00) >> 8);
-	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x000000ff));
-	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x03000000) >> 24);
-	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x00ffc000) >> 16);
-	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x0000ff00) >> 8);
-	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x000000ff));
-	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x03000000) >> 24);
-	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x00ffc000) >> 16);
-	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x0000ff00) >> 8);
-	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x000000ff));
-	buf[i++] = (u8) ((ns_coeff2_8k     & 0x01c00000) >> 22);
-	buf[i++] = (u8) ((ns_coeff2_8k     & 0x003fc000) >> 14);
-	buf[i++] = (u8) ((ns_coeff2_8k     & 0x00003fc0) >> 6);
-	buf[i++] = (u8) ((ns_coeff2_8k     & 0x0000003f));
+	buf[0]  = (u8) ((coeff_table[i].ns_coeff1_2048nu & 0x03000000) >> 24);
+	buf[1]  = (u8) ((coeff_table[i].ns_coeff1_2048nu & 0x00ff0000) >> 16);
+	buf[2]  = (u8) ((coeff_table[i].ns_coeff1_2048nu & 0x0000ff00) >> 8);
+	buf[3]  = (u8) ((coeff_table[i].ns_coeff1_2048nu & 0x000000ff));
+	buf[4]  = (u8) ((coeff_table[i].ns_coeff2_2k     & 0x01c00000) >> 22);
+	buf[5]  = (u8) ((coeff_table[i].ns_coeff2_2k     & 0x003fc000) >> 14);
+	buf[6]  = (u8) ((coeff_table[i].ns_coeff2_2k     & 0x00003fc0) >> 6);
+	buf[7]  = (u8) ((coeff_table[i].ns_coeff2_2k     & 0x0000003f));
+	buf[8]  = (u8) ((coeff_table[i].ns_coeff1_8191nu & 0x03000000) >> 24);
+	buf[9]  = (u8) ((coeff_table[i].ns_coeff1_8191nu & 0x00ffc000) >> 16);
+	buf[10] = (u8) ((coeff_table[i].ns_coeff1_8191nu & 0x0000ff00) >> 8);
+	buf[11] = (u8) ((coeff_table[i].ns_coeff1_8191nu & 0x000000ff));
+	buf[12] = (u8) ((coeff_table[i].ns_coeff1_8192nu & 0x03000000) >> 24);
+	buf[13] = (u8) ((coeff_table[i].ns_coeff1_8192nu & 0x00ffc000) >> 16);
+	buf[14] = (u8) ((coeff_table[i].ns_coeff1_8192nu & 0x0000ff00) >> 8);
+	buf[15] = (u8) ((coeff_table[i].ns_coeff1_8192nu & 0x000000ff));
+	buf[16] = (u8) ((coeff_table[i].ns_coeff1_8193nu & 0x03000000) >> 24);
+	buf[17] = (u8) ((coeff_table[i].ns_coeff1_8193nu & 0x00ffc000) >> 16);
+	buf[18] = (u8) ((coeff_table[i].ns_coeff1_8193nu & 0x0000ff00) >> 8);
+	buf[19] = (u8) ((coeff_table[i].ns_coeff1_8193nu & 0x000000ff));
+	buf[20] = (u8) ((coeff_table[i].ns_coeff2_8k     & 0x01c00000) >> 22);
+	buf[21] = (u8) ((coeff_table[i].ns_coeff2_8k     & 0x003fc000) >> 14);
+	buf[22] = (u8) ((coeff_table[i].ns_coeff2_8k     & 0x00003fc0) >> 6);
+	buf[23] = (u8) ((coeff_table[i].ns_coeff2_8k     & 0x0000003f));
 
 	deb_info("%s: coeff:", __func__);
 	debug_dump(buf, sizeof(buf), deb_info);
@@ -398,6 +275,7 @@ static int af9013_set_coeff(struct af9013_state *state, fe_bandwidth_t bw)
 			break;
 	}
 
+error:
 	return ret;
 }
 

drivers/media/dvb/frontends/af9013_priv.h

@@ -60,6 +60,49 @@ struct snr_table {
 	u8 snr;
 };
 
+struct coeff {
+	u32 adc_clock;
+	fe_bandwidth_t bw;
+	u32 ns_coeff1_2048nu;
+	u32 ns_coeff1_8191nu;
+	u32 ns_coeff1_8192nu;
+	u32 ns_coeff1_8193nu;
+	u32 ns_coeff2_2k;
+	u32 ns_coeff2_8k;
+};
+
+/* coeff lookup table */
+static struct coeff coeff_table[] = {
+	/* 28.800 MHz */
+	{ 28800, BANDWIDTH_6_MHZ, 0x01e79e7a, 0x0079eb6e, 0x0079e79e,
+		0x0079e3cf, 0x00f3cf3d, 0x003cf3cf },
+	{ 28800, BANDWIDTH_7_MHZ, 0x0238e38e, 0x008e3d55, 0x008e38e4,
+		0x008e3472, 0x011c71c7, 0x00471c72 },
+	{ 28800, BANDWIDTH_8_MHZ, 0x028a28a3, 0x00a28f3d, 0x00a28a29,
+		0x00a28514, 0x01451451, 0x00514514 },
+	/* 20.480 MHz */
+	{ 20480, BANDWIDTH_6_MHZ, 0x02adb6dc, 0x00ab7313, 0x00ab6db7,
+		0x00ab685c, 0x0156db6e, 0x0055b6dc },
+	{ 20480, BANDWIDTH_7_MHZ, 0x03200001, 0x00c80640, 0x00c80000,
+		0x00c7f9c0, 0x01900000, 0x00640000 },
+	{ 20480, BANDWIDTH_8_MHZ, 0x03924926, 0x00e4996e, 0x00e49249,
+		0x00e48b25, 0x01c92493, 0x00724925 },
+	/* 28.000 MHz */
+	{ 28000, BANDWIDTH_6_MHZ, 0x01f58d10, 0x007d672f, 0x007d6344,
+		0x007d5f59, 0x00fac688, 0x003eb1a2 },
+	{ 28000, BANDWIDTH_7_MHZ, 0x02492492, 0x00924db7, 0x00924925,
+		0x00924492, 0x01249249, 0x00492492 },
+	{ 28000, BANDWIDTH_8_MHZ, 0x029cbc15, 0x00a7343f, 0x00a72f05,
+		0x00a729cc, 0x014e5e0a, 0x00539783 },
+	/* 25.000 MHz */
+	{ 25000, BANDWIDTH_6_MHZ, 0x0231bcb5, 0x008c7391, 0x008c6f2d,
+		0x008c6aca, 0x0118de5b, 0x00463797 },
+	{ 25000, BANDWIDTH_7_MHZ, 0x028f5c29, 0x00a3dc29, 0x00a3d70a,
+		0x00a3d1ec, 0x0147ae14, 0x0051eb85 },
+	{ 25000, BANDWIDTH_8_MHZ, 0x02ecfb9d, 0x00bb44c1, 0x00bb3ee7,
+		0x00bb390d, 0x01767dce, 0x005d9f74 },
+};
+
 /* QPSK SNR lookup table */
 static struct snr_table qpsk_snr_table[] = {
 	{ 0x0b4771,  0 },